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PowerPC64 debian bug 886264, out-of-line save/restore functions
[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* __glink_PLTresolve stub instructions. We enter with the index in R0. */
191 #define GLINK_PLTRESOLVE_SIZE(htab) \
192 (8u + (htab->opd_abi ? 11 * 4 : 14 * 4))
193 /* 0: */
194 /* .quad plt0-1f */
195 /* __glink: */
196 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
197 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
198 /* 1: */
199 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
200 /* ld %2,(0b-1b)(%11) */
201 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
202 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
203 /* ld %12,0(%11) */
204 /* ld %2,8(%11) */
205 /* mtctr %12 */
206 /* ld %11,16(%11) */
207 /* bctr */
208 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
209 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
210 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
211 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
212 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
213
214 /* Pad with this. */
215 #define NOP 0x60000000
216
217 /* Some other nops. */
218 #define CROR_151515 0x4def7b82
219 #define CROR_313131 0x4ffffb82
220
221 /* .glink entries for the first 32k functions are two instructions. */
222 #define LI_R0_0 0x38000000 /* li %r0,0 */
223 #define B_DOT 0x48000000 /* b . */
224
225 /* After that, we need two instructions to load the index, followed by
226 a branch. */
227 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
228 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
229
230 /* Instructions used by the save and restore reg functions. */
231 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
232 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
233 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
234 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
235 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
236 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
237 #define LI_R12_0 0x39800000 /* li %r12,0 */
238 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
239 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
240 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
241 #define BLR 0x4e800020 /* blr */
242
243 /* Since .opd is an array of descriptors and each entry will end up
244 with identical R_PPC64_RELATIVE relocs, there is really no need to
245 propagate .opd relocs; The dynamic linker should be taught to
246 relocate .opd without reloc entries. */
247 #ifndef NO_OPD_RELOCS
248 #define NO_OPD_RELOCS 0
249 #endif
250
251 #ifndef ARRAY_SIZE
252 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
253 #endif
254
255 static inline int
256 abiversion (bfd *abfd)
257 {
258 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
259 }
260
261 static inline void
262 set_abiversion (bfd *abfd, int ver)
263 {
264 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
265 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
266 }
267 \f
268 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
269
270 /* Relocation HOWTO's. */
271 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
272
273 static reloc_howto_type ppc64_elf_howto_raw[] =
274 {
275 /* This reloc does nothing. */
276 HOWTO (R_PPC64_NONE, /* type */
277 0, /* rightshift */
278 3, /* size (0 = byte, 1 = short, 2 = long) */
279 0, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_dont, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_NONE", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A standard 32 bit relocation. */
291 HOWTO (R_PPC64_ADDR32, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR32", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* An absolute 26 bit branch; the lower two bits must be zero.
306 FIXME: we don't check that, we just clear them. */
307 HOWTO (R_PPC64_ADDR24, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 26, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC64_ADDR24", /* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0x03fffffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A standard 16 bit relocation. */
322 HOWTO (R_PPC64_ADDR16, /* type */
323 0, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC64_ADDR16", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* A 16 bit relocation without overflow. */
337 HOWTO (R_PPC64_ADDR16_LO, /* type */
338 0, /* rightshift */
339 1, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_dont,/* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC64_ADDR16_LO", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 /* Bits 16-31 of an address. */
352 HOWTO (R_PPC64_ADDR16_HI, /* type */
353 16, /* rightshift */
354 1, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC64_ADDR16_HI", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
367 bits, treated as a signed number, is negative. */
368 HOWTO (R_PPC64_ADDR16_HA, /* type */
369 16, /* rightshift */
370 1, /* size (0 = byte, 1 = short, 2 = long) */
371 16, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 ppc64_elf_ha_reloc, /* special_function */
376 "R_PPC64_ADDR16_HA", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 /* An absolute 16 bit branch; the lower two bits must be zero.
383 FIXME: we don't check that, we just clear them. */
384 HOWTO (R_PPC64_ADDR14, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 16, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_signed, /* complain_on_overflow */
391 ppc64_elf_branch_reloc, /* special_function */
392 "R_PPC64_ADDR14", /* name */
393 FALSE, /* partial_inplace */
394 0, /* src_mask */
395 0x0000fffc, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 /* An absolute 16 bit branch, for which bit 10 should be set to
399 indicate that the branch is expected to be taken. The lower two
400 bits must be zero. */
401 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 ppc64_elf_brtaken_reloc, /* special_function */
409 "R_PPC64_ADDR14_BRTAKEN",/* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0x0000fffc, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* An absolute 16 bit branch, for which bit 10 should be set to
416 indicate that the branch is not expected to be taken. The lower
417 two bits must be zero. */
418 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
419 0, /* rightshift */
420 2, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_signed, /* complain_on_overflow */
425 ppc64_elf_brtaken_reloc, /* special_function */
426 "R_PPC64_ADDR14_BRNTAKEN",/* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0x0000fffc, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* A relative 26 bit branch; the lower two bits must be zero. */
433 HOWTO (R_PPC64_REL24, /* type */
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 26, /* bitsize */
437 TRUE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_signed, /* complain_on_overflow */
440 ppc64_elf_branch_reloc, /* special_function */
441 "R_PPC64_REL24", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0x03fffffc, /* dst_mask */
445 TRUE), /* pcrel_offset */
446
447 /* A relative 16 bit branch; the lower two bits must be zero. */
448 HOWTO (R_PPC64_REL14, /* type */
449 0, /* rightshift */
450 2, /* size (0 = byte, 1 = short, 2 = long) */
451 16, /* bitsize */
452 TRUE, /* pc_relative */
453 0, /* bitpos */
454 complain_overflow_signed, /* complain_on_overflow */
455 ppc64_elf_branch_reloc, /* special_function */
456 "R_PPC64_REL14", /* name */
457 FALSE, /* partial_inplace */
458 0, /* src_mask */
459 0x0000fffc, /* dst_mask */
460 TRUE), /* pcrel_offset */
461
462 /* A relative 16 bit branch. Bit 10 should be set to indicate that
463 the branch is expected to be taken. The lower two bits must be
464 zero. */
465 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 16, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 ppc64_elf_brtaken_reloc, /* special_function */
473 "R_PPC64_REL14_BRTAKEN", /* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x0000fffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* A relative 16 bit branch. Bit 10 should be set to indicate that
480 the branch is not expected to be taken. The lower two bits must
481 be zero. */
482 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 TRUE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_signed, /* complain_on_overflow */
489 ppc64_elf_brtaken_reloc, /* special_function */
490 "R_PPC64_REL14_BRNTAKEN",/* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0000fffc, /* dst_mask */
494 TRUE), /* pcrel_offset */
495
496 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
497 symbol. */
498 HOWTO (R_PPC64_GOT16, /* type */
499 0, /* rightshift */
500 1, /* size (0 = byte, 1 = short, 2 = long) */
501 16, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_signed, /* complain_on_overflow */
505 ppc64_elf_unhandled_reloc, /* special_function */
506 "R_PPC64_GOT16", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0xffff, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
513 the symbol. */
514 HOWTO (R_PPC64_GOT16_LO, /* type */
515 0, /* rightshift */
516 1, /* size (0 = byte, 1 = short, 2 = long) */
517 16, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc64_elf_unhandled_reloc, /* special_function */
522 "R_PPC64_GOT16_LO", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
529 the symbol. */
530 HOWTO (R_PPC64_GOT16_HI, /* type */
531 16, /* rightshift */
532 1, /* size (0 = byte, 1 = short, 2 = long) */
533 16, /* bitsize */
534 FALSE, /* pc_relative */
535 0, /* bitpos */
536 complain_overflow_signed,/* complain_on_overflow */
537 ppc64_elf_unhandled_reloc, /* special_function */
538 "R_PPC64_GOT16_HI", /* name */
539 FALSE, /* partial_inplace */
540 0, /* src_mask */
541 0xffff, /* dst_mask */
542 FALSE), /* pcrel_offset */
543
544 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
545 the symbol. */
546 HOWTO (R_PPC64_GOT16_HA, /* type */
547 16, /* rightshift */
548 1, /* size (0 = byte, 1 = short, 2 = long) */
549 16, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_signed,/* complain_on_overflow */
553 ppc64_elf_unhandled_reloc, /* special_function */
554 "R_PPC64_GOT16_HA", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* This is used only by the dynamic linker. The symbol should exist
561 both in the object being run and in some shared library. The
562 dynamic linker copies the data addressed by the symbol from the
563 shared library into the object, because the object being
564 run has to have the data at some particular address. */
565 HOWTO (R_PPC64_COPY, /* type */
566 0, /* rightshift */
567 0, /* this one is variable size */
568 0, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_dont, /* complain_on_overflow */
572 ppc64_elf_unhandled_reloc, /* special_function */
573 "R_PPC64_COPY", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC64_ADDR64, but used when setting global offset table
580 entries. */
581 HOWTO (R_PPC64_GLOB_DAT, /* type */
582 0, /* rightshift */
583 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
584 64, /* bitsize */
585 FALSE, /* pc_relative */
586 0, /* bitpos */
587 complain_overflow_dont, /* complain_on_overflow */
588 ppc64_elf_unhandled_reloc, /* special_function */
589 "R_PPC64_GLOB_DAT", /* name */
590 FALSE, /* partial_inplace */
591 0, /* src_mask */
592 ONES (64), /* dst_mask */
593 FALSE), /* pcrel_offset */
594
595 /* Created by the link editor. Marks a procedure linkage table
596 entry for a symbol. */
597 HOWTO (R_PPC64_JMP_SLOT, /* type */
598 0, /* rightshift */
599 0, /* size (0 = byte, 1 = short, 2 = long) */
600 0, /* bitsize */
601 FALSE, /* pc_relative */
602 0, /* bitpos */
603 complain_overflow_dont, /* complain_on_overflow */
604 ppc64_elf_unhandled_reloc, /* special_function */
605 "R_PPC64_JMP_SLOT", /* name */
606 FALSE, /* partial_inplace */
607 0, /* src_mask */
608 0, /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 /* Used only by the dynamic linker. When the object is run, this
612 doubleword64 is set to the load address of the object, plus the
613 addend. */
614 HOWTO (R_PPC64_RELATIVE, /* type */
615 0, /* rightshift */
616 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
617 64, /* bitsize */
618 FALSE, /* pc_relative */
619 0, /* bitpos */
620 complain_overflow_dont, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_RELATIVE", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 ONES (64), /* dst_mask */
626 FALSE), /* pcrel_offset */
627
628 /* Like R_PPC64_ADDR32, but may be unaligned. */
629 HOWTO (R_PPC64_UADDR32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_PPC64_UADDR32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* Like R_PPC64_ADDR16, but may be unaligned. */
644 HOWTO (R_PPC64_UADDR16, /* type */
645 0, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC64_UADDR16", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* 32-bit PC relative. */
659 HOWTO (R_PPC64_REL32, /* type */
660 0, /* rightshift */
661 2, /* size (0 = byte, 1 = short, 2 = long) */
662 32, /* bitsize */
663 TRUE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_signed, /* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 "R_PPC64_REL32", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffffffff, /* dst_mask */
671 TRUE), /* pcrel_offset */
672
673 /* 32-bit relocation to the symbol's procedure linkage table. */
674 HOWTO (R_PPC64_PLT32, /* type */
675 0, /* rightshift */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
677 32, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_bitfield, /* complain_on_overflow */
681 ppc64_elf_unhandled_reloc, /* special_function */
682 "R_PPC64_PLT32", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffffffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
689 FIXME: R_PPC64_PLTREL32 not supported. */
690 HOWTO (R_PPC64_PLTREL32, /* type */
691 0, /* rightshift */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
693 32, /* bitsize */
694 TRUE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_signed, /* complain_on_overflow */
697 ppc64_elf_unhandled_reloc, /* special_function */
698 "R_PPC64_PLTREL32", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffffffff, /* dst_mask */
702 TRUE), /* pcrel_offset */
703
704 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
705 the symbol. */
706 HOWTO (R_PPC64_PLT16_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 ppc64_elf_unhandled_reloc, /* special_function */
714 "R_PPC64_PLT16_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
721 the symbol. */
722 HOWTO (R_PPC64_PLT16_HI, /* type */
723 16, /* rightshift */
724 1, /* size (0 = byte, 1 = short, 2 = long) */
725 16, /* bitsize */
726 FALSE, /* pc_relative */
727 0, /* bitpos */
728 complain_overflow_signed, /* complain_on_overflow */
729 ppc64_elf_unhandled_reloc, /* special_function */
730 "R_PPC64_PLT16_HI", /* name */
731 FALSE, /* partial_inplace */
732 0, /* src_mask */
733 0xffff, /* dst_mask */
734 FALSE), /* pcrel_offset */
735
736 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
737 the symbol. */
738 HOWTO (R_PPC64_PLT16_HA, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_signed, /* complain_on_overflow */
745 ppc64_elf_unhandled_reloc, /* special_function */
746 "R_PPC64_PLT16_HA", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF, /* type */
754 0, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_signed, /* complain_on_overflow */
760 ppc64_elf_sectoff_reloc, /* special_function */
761 "R_PPC64_SECTOFF", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_SECTOFF, but no overflow warning. */
768 HOWTO (R_PPC64_SECTOFF_LO, /* type */
769 0, /* rightshift */
770 1, /* size (0 = byte, 1 = short, 2 = long) */
771 16, /* bitsize */
772 FALSE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 ppc64_elf_sectoff_reloc, /* special_function */
776 "R_PPC64_SECTOFF_LO", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xffff, /* dst_mask */
780 FALSE), /* pcrel_offset */
781
782 /* 16-bit upper half section relative relocation. */
783 HOWTO (R_PPC64_SECTOFF_HI, /* type */
784 16, /* rightshift */
785 1, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_signed, /* complain_on_overflow */
790 ppc64_elf_sectoff_reloc, /* special_function */
791 "R_PPC64_SECTOFF_HI", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* 16-bit upper half adjusted section relative relocation. */
798 HOWTO (R_PPC64_SECTOFF_HA, /* type */
799 16, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_signed, /* complain_on_overflow */
805 ppc64_elf_sectoff_ha_reloc, /* special_function */
806 "R_PPC64_SECTOFF_HA", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* Like R_PPC64_REL24 without touching the two least significant bits. */
813 HOWTO (R_PPC64_REL30, /* type */
814 2, /* rightshift */
815 2, /* size (0 = byte, 1 = short, 2 = long) */
816 30, /* bitsize */
817 TRUE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 bfd_elf_generic_reloc, /* special_function */
821 "R_PPC64_REL30", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xfffffffc, /* dst_mask */
825 TRUE), /* pcrel_offset */
826
827 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
828
829 /* A standard 64-bit relocation. */
830 HOWTO (R_PPC64_ADDR64, /* type */
831 0, /* rightshift */
832 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
833 64, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_PPC64_ADDR64", /* name */
839 FALSE, /* partial_inplace */
840 0, /* src_mask */
841 ONES (64), /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 /* The bits 32-47 of an address. */
845 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
846 32, /* rightshift */
847 1, /* size (0 = byte, 1 = short, 2 = long) */
848 16, /* bitsize */
849 FALSE, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_dont, /* complain_on_overflow */
852 bfd_elf_generic_reloc, /* special_function */
853 "R_PPC64_ADDR16_HIGHER", /* name */
854 FALSE, /* partial_inplace */
855 0, /* src_mask */
856 0xffff, /* dst_mask */
857 FALSE), /* pcrel_offset */
858
859 /* The bits 32-47 of an address, plus 1 if the contents of the low
860 16 bits, treated as a signed number, is negative. */
861 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
862 32, /* rightshift */
863 1, /* size (0 = byte, 1 = short, 2 = long) */
864 16, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont, /* complain_on_overflow */
868 ppc64_elf_ha_reloc, /* special_function */
869 "R_PPC64_ADDR16_HIGHERA", /* name */
870 FALSE, /* partial_inplace */
871 0, /* src_mask */
872 0xffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 /* The bits 48-63 of an address. */
876 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
877 48, /* rightshift */
878 1, /* size (0 = byte, 1 = short, 2 = long) */
879 16, /* bitsize */
880 FALSE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_dont, /* complain_on_overflow */
883 bfd_elf_generic_reloc, /* special_function */
884 "R_PPC64_ADDR16_HIGHEST", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 0xffff, /* dst_mask */
888 FALSE), /* pcrel_offset */
889
890 /* The bits 48-63 of an address, plus 1 if the contents of the low
891 16 bits, treated as a signed number, is negative. */
892 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
893 48, /* rightshift */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_ha_reloc, /* special_function */
900 "R_PPC64_ADDR16_HIGHESTA", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* Like ADDR64, but may be unaligned. */
907 HOWTO (R_PPC64_UADDR64, /* type */
908 0, /* rightshift */
909 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
910 64, /* bitsize */
911 FALSE, /* pc_relative */
912 0, /* bitpos */
913 complain_overflow_dont, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "R_PPC64_UADDR64", /* name */
916 FALSE, /* partial_inplace */
917 0, /* src_mask */
918 ONES (64), /* dst_mask */
919 FALSE), /* pcrel_offset */
920
921 /* 64-bit relative relocation. */
922 HOWTO (R_PPC64_REL64, /* type */
923 0, /* rightshift */
924 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
925 64, /* bitsize */
926 TRUE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_dont, /* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 "R_PPC64_REL64", /* name */
931 FALSE, /* partial_inplace */
932 0, /* src_mask */
933 ONES (64), /* dst_mask */
934 TRUE), /* pcrel_offset */
935
936 /* 64-bit relocation to the symbol's procedure linkage table. */
937 HOWTO (R_PPC64_PLT64, /* type */
938 0, /* rightshift */
939 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
940 64, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_unhandled_reloc, /* special_function */
945 "R_PPC64_PLT64", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 ONES (64), /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* 64-bit PC relative relocation to the symbol's procedure linkage
952 table. */
953 /* FIXME: R_PPC64_PLTREL64 not supported. */
954 HOWTO (R_PPC64_PLTREL64, /* type */
955 0, /* rightshift */
956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
957 64, /* bitsize */
958 TRUE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_unhandled_reloc, /* special_function */
962 "R_PPC64_PLTREL64", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 ONES (64), /* dst_mask */
966 TRUE), /* pcrel_offset */
967
968 /* 16 bit TOC-relative relocation. */
969
970 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
971 HOWTO (R_PPC64_TOC16, /* type */
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc64_elf_toc_reloc, /* special_function */
979 "R_PPC64_TOC16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 16 bit TOC-relative relocation without overflow. */
986
987 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
988 HOWTO (R_PPC64_TOC16_LO, /* type */
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont, /* complain_on_overflow */
995 ppc64_elf_toc_reloc, /* special_function */
996 "R_PPC64_TOC16_LO", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* 16 bit TOC-relative relocation, high 16 bits. */
1003
1004 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1005 HOWTO (R_PPC64_TOC16_HI, /* type */
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_signed, /* complain_on_overflow */
1012 ppc64_elf_toc_reloc, /* special_function */
1013 "R_PPC64_TOC16_HI", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1020 contents of the low 16 bits, treated as a signed number, is
1021 negative. */
1022
1023 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1024 HOWTO (R_PPC64_TOC16_HA, /* type */
1025 16, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_signed, /* complain_on_overflow */
1031 ppc64_elf_toc_ha_reloc, /* special_function */
1032 "R_PPC64_TOC16_HA", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1039
1040 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1041 HOWTO (R_PPC64_TOC, /* type */
1042 0, /* rightshift */
1043 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1044 64, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 ppc64_elf_toc64_reloc, /* special_function */
1049 "R_PPC64_TOC", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 ONES (64), /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_GOT16, but also informs the link editor that the
1056 value to relocate may (!) refer to a PLT entry which the link
1057 editor (a) may replace with the symbol value. If the link editor
1058 is unable to fully resolve the symbol, it may (b) create a PLT
1059 entry and store the address to the new PLT entry in the GOT.
1060 This permits lazy resolution of function symbols at run time.
1061 The link editor may also skip all of this and just (c) emit a
1062 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1063 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1064 HOWTO (R_PPC64_PLTGOT16, /* type */
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_signed, /* complain_on_overflow */
1071 ppc64_elf_unhandled_reloc, /* special_function */
1072 "R_PPC64_PLTGOT16", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like R_PPC64_PLTGOT16, but without overflow. */
1079 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1080 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1081 0, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc64_elf_unhandled_reloc, /* special_function */
1088 "R_PPC64_PLTGOT16_LO", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1095 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1096 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1097 16, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_signed, /* complain_on_overflow */
1103 ppc64_elf_unhandled_reloc, /* special_function */
1104 "R_PPC64_PLTGOT16_HI", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xffff, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1111 1 if the contents of the low 16 bits, treated as a signed number,
1112 is negative. */
1113 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1114 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_PLTGOT16_HA", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_ADDR16_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_signed, /* complain_on_overflow */
1136 bfd_elf_generic_reloc, /* special_function */
1137 "R_PPC64_ADDR16_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont,/* complain_on_overflow */
1151 bfd_elf_generic_reloc, /* special_function */
1152 "R_PPC64_ADDR16_LO_DS",/* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_GOT16_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_signed, /* complain_on_overflow */
1166 ppc64_elf_unhandled_reloc, /* special_function */
1167 "R_PPC64_GOT16_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_unhandled_reloc, /* special_function */
1182 "R_PPC64_GOT16_LO_DS", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_dont, /* complain_on_overflow */
1196 ppc64_elf_unhandled_reloc, /* special_function */
1197 "R_PPC64_PLT16_LO_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_signed, /* complain_on_overflow */
1211 ppc64_elf_sectoff_reloc, /* special_function */
1212 "R_PPC64_SECTOFF_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1219 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1220 0, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_dont, /* complain_on_overflow */
1226 ppc64_elf_sectoff_reloc, /* special_function */
1227 "R_PPC64_SECTOFF_LO_DS",/* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xfffc, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1234 HOWTO (R_PPC64_TOC16_DS, /* type */
1235 0, /* rightshift */
1236 1, /* size (0 = byte, 1 = short, 2 = long) */
1237 16, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_signed, /* complain_on_overflow */
1241 ppc64_elf_toc_reloc, /* special_function */
1242 "R_PPC64_TOC16_DS", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xfffc, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1249 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont, /* complain_on_overflow */
1256 ppc64_elf_toc_reloc, /* special_function */
1257 "R_PPC64_TOC16_LO_DS", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xfffc, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1264 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1265 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_signed, /* complain_on_overflow */
1272 ppc64_elf_unhandled_reloc, /* special_function */
1273 "R_PPC64_PLTGOT16_DS", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xfffc, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1280 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1281 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1282 0, /* rightshift */
1283 1, /* size (0 = byte, 1 = short, 2 = long) */
1284 16, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_dont, /* complain_on_overflow */
1288 ppc64_elf_unhandled_reloc, /* special_function */
1289 "R_PPC64_PLTGOT16_LO_DS",/* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0xfffc, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 /* Marker relocs for TLS. */
1296 HOWTO (R_PPC64_TLS,
1297 0, /* rightshift */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1299 32, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC64_TLS", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 HOWTO (R_PPC64_TLSGD,
1311 0, /* rightshift */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1313 32, /* bitsize */
1314 FALSE, /* pc_relative */
1315 0, /* bitpos */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1318 "R_PPC64_TLSGD", /* name */
1319 FALSE, /* partial_inplace */
1320 0, /* src_mask */
1321 0, /* dst_mask */
1322 FALSE), /* pcrel_offset */
1323
1324 HOWTO (R_PPC64_TLSLD,
1325 0, /* rightshift */
1326 2, /* size (0 = byte, 1 = short, 2 = long) */
1327 32, /* bitsize */
1328 FALSE, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_dont, /* complain_on_overflow */
1331 bfd_elf_generic_reloc, /* special_function */
1332 "R_PPC64_TLSLD", /* name */
1333 FALSE, /* partial_inplace */
1334 0, /* src_mask */
1335 0, /* dst_mask */
1336 FALSE), /* pcrel_offset */
1337
1338 HOWTO (R_PPC64_TOCSAVE,
1339 0, /* rightshift */
1340 2, /* size (0 = byte, 1 = short, 2 = long) */
1341 32, /* bitsize */
1342 FALSE, /* pc_relative */
1343 0, /* bitpos */
1344 complain_overflow_dont, /* complain_on_overflow */
1345 bfd_elf_generic_reloc, /* special_function */
1346 "R_PPC64_TOCSAVE", /* name */
1347 FALSE, /* partial_inplace */
1348 0, /* src_mask */
1349 0, /* dst_mask */
1350 FALSE), /* pcrel_offset */
1351
1352 /* Computes the load module index of the load module that contains the
1353 definition of its TLS sym. */
1354 HOWTO (R_PPC64_DTPMOD64,
1355 0, /* rightshift */
1356 4, /* size (0 = byte, 1 = short, 2 = long) */
1357 64, /* bitsize */
1358 FALSE, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_dont, /* complain_on_overflow */
1361 ppc64_elf_unhandled_reloc, /* special_function */
1362 "R_PPC64_DTPMOD64", /* name */
1363 FALSE, /* partial_inplace */
1364 0, /* src_mask */
1365 ONES (64), /* dst_mask */
1366 FALSE), /* pcrel_offset */
1367
1368 /* Computes a dtv-relative displacement, the difference between the value
1369 of sym+add and the base address of the thread-local storage block that
1370 contains the definition of sym, minus 0x8000. */
1371 HOWTO (R_PPC64_DTPREL64,
1372 0, /* rightshift */
1373 4, /* size (0 = byte, 1 = short, 2 = long) */
1374 64, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL64", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 ONES (64), /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* A 16 bit dtprel reloc. */
1386 HOWTO (R_PPC64_DTPREL16,
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_signed, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16, but no overflow. */
1401 HOWTO (R_PPC64_DTPREL16_LO,
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_LO", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HI,
1417 16, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_signed, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HI", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HA,
1432 16, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_signed, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HA", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHER,
1447 32, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHER", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1461 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1462 32, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_HIGHERA", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xffff, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1476 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1477 48, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_HIGHEST", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xffff, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1491 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1492 48, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_dont, /* complain_on_overflow */
1498 ppc64_elf_unhandled_reloc, /* special_function */
1499 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xffff, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 /* Like DTPREL16, but for insns with a DS field. */
1506 HOWTO (R_PPC64_DTPREL16_DS,
1507 0, /* rightshift */
1508 1, /* size (0 = byte, 1 = short, 2 = long) */
1509 16, /* bitsize */
1510 FALSE, /* pc_relative */
1511 0, /* bitpos */
1512 complain_overflow_signed, /* complain_on_overflow */
1513 ppc64_elf_unhandled_reloc, /* special_function */
1514 "R_PPC64_DTPREL16_DS", /* name */
1515 FALSE, /* partial_inplace */
1516 0, /* src_mask */
1517 0xfffc, /* dst_mask */
1518 FALSE), /* pcrel_offset */
1519
1520 /* Like DTPREL16_DS, but no overflow. */
1521 HOWTO (R_PPC64_DTPREL16_LO_DS,
1522 0, /* rightshift */
1523 1, /* size (0 = byte, 1 = short, 2 = long) */
1524 16, /* bitsize */
1525 FALSE, /* pc_relative */
1526 0, /* bitpos */
1527 complain_overflow_dont, /* complain_on_overflow */
1528 ppc64_elf_unhandled_reloc, /* special_function */
1529 "R_PPC64_DTPREL16_LO_DS", /* name */
1530 FALSE, /* partial_inplace */
1531 0, /* src_mask */
1532 0xfffc, /* dst_mask */
1533 FALSE), /* pcrel_offset */
1534
1535 /* Computes a tp-relative displacement, the difference between the value of
1536 sym+add and the value of the thread pointer (r13). */
1537 HOWTO (R_PPC64_TPREL64,
1538 0, /* rightshift */
1539 4, /* size (0 = byte, 1 = short, 2 = long) */
1540 64, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL64", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 ONES (64), /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* A 16 bit tprel reloc. */
1552 HOWTO (R_PPC64_TPREL16,
1553 0, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_signed, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16, but no overflow. */
1567 HOWTO (R_PPC64_TPREL16_LO,
1568 0, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_LO", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_LO, but next higher group of 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HI,
1583 16, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_signed, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HI", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HI, but adjust for low 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HA,
1598 16, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_signed, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HA", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HI, but next higher group of 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHER,
1613 32, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHER", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1627 HOWTO (R_PPC64_TPREL16_HIGHERA,
1628 32, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_dont, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_HIGHERA", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xffff, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1642 HOWTO (R_PPC64_TPREL16_HIGHEST,
1643 48, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_HIGHEST", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xffff, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1657 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1658 48, /* rightshift */
1659 1, /* size (0 = byte, 1 = short, 2 = long) */
1660 16, /* bitsize */
1661 FALSE, /* pc_relative */
1662 0, /* bitpos */
1663 complain_overflow_dont, /* complain_on_overflow */
1664 ppc64_elf_unhandled_reloc, /* special_function */
1665 "R_PPC64_TPREL16_HIGHESTA", /* name */
1666 FALSE, /* partial_inplace */
1667 0, /* src_mask */
1668 0xffff, /* dst_mask */
1669 FALSE), /* pcrel_offset */
1670
1671 /* Like TPREL16, but for insns with a DS field. */
1672 HOWTO (R_PPC64_TPREL16_DS,
1673 0, /* rightshift */
1674 1, /* size (0 = byte, 1 = short, 2 = long) */
1675 16, /* bitsize */
1676 FALSE, /* pc_relative */
1677 0, /* bitpos */
1678 complain_overflow_signed, /* complain_on_overflow */
1679 ppc64_elf_unhandled_reloc, /* special_function */
1680 "R_PPC64_TPREL16_DS", /* name */
1681 FALSE, /* partial_inplace */
1682 0, /* src_mask */
1683 0xfffc, /* dst_mask */
1684 FALSE), /* pcrel_offset */
1685
1686 /* Like TPREL16_DS, but no overflow. */
1687 HOWTO (R_PPC64_TPREL16_LO_DS,
1688 0, /* rightshift */
1689 1, /* size (0 = byte, 1 = short, 2 = long) */
1690 16, /* bitsize */
1691 FALSE, /* pc_relative */
1692 0, /* bitpos */
1693 complain_overflow_dont, /* complain_on_overflow */
1694 ppc64_elf_unhandled_reloc, /* special_function */
1695 "R_PPC64_TPREL16_LO_DS", /* name */
1696 FALSE, /* partial_inplace */
1697 0, /* src_mask */
1698 0xfffc, /* dst_mask */
1699 FALSE), /* pcrel_offset */
1700
1701 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1702 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1703 to the first entry relative to the TOC base (r2). */
1704 HOWTO (R_PPC64_GOT_TLSGD16,
1705 0, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_signed, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Like GOT_TLSGD16, but no overflow. */
1719 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1720 0, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 FALSE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc64_elf_unhandled_reloc, /* special_function */
1727 "R_PPC64_GOT_TLSGD16_LO", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 FALSE), /* pcrel_offset */
1732
1733 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1734 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1735 16, /* rightshift */
1736 1, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 FALSE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc64_elf_unhandled_reloc, /* special_function */
1742 "R_PPC64_GOT_TLSGD16_HI", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0xffff, /* dst_mask */
1746 FALSE), /* pcrel_offset */
1747
1748 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1749 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1750 16, /* rightshift */
1751 1, /* size (0 = byte, 1 = short, 2 = long) */
1752 16, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_signed, /* complain_on_overflow */
1756 ppc64_elf_unhandled_reloc, /* special_function */
1757 "R_PPC64_GOT_TLSGD16_HA", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0xffff, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1764 with values (sym+add)@dtpmod and zero, and computes the offset to the
1765 first entry relative to the TOC base (r2). */
1766 HOWTO (R_PPC64_GOT_TLSLD16,
1767 0, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Like GOT_TLSLD16, but no overflow. */
1781 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1782 0, /* rightshift */
1783 1, /* size (0 = byte, 1 = short, 2 = long) */
1784 16, /* bitsize */
1785 FALSE, /* pc_relative */
1786 0, /* bitpos */
1787 complain_overflow_dont, /* complain_on_overflow */
1788 ppc64_elf_unhandled_reloc, /* special_function */
1789 "R_PPC64_GOT_TLSLD16_LO", /* name */
1790 FALSE, /* partial_inplace */
1791 0, /* src_mask */
1792 0xffff, /* dst_mask */
1793 FALSE), /* pcrel_offset */
1794
1795 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1796 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1797 16, /* rightshift */
1798 1, /* size (0 = byte, 1 = short, 2 = long) */
1799 16, /* bitsize */
1800 FALSE, /* pc_relative */
1801 0, /* bitpos */
1802 complain_overflow_signed, /* complain_on_overflow */
1803 ppc64_elf_unhandled_reloc, /* special_function */
1804 "R_PPC64_GOT_TLSLD16_HI", /* name */
1805 FALSE, /* partial_inplace */
1806 0, /* src_mask */
1807 0xffff, /* dst_mask */
1808 FALSE), /* pcrel_offset */
1809
1810 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1811 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1812 16, /* rightshift */
1813 1, /* size (0 = byte, 1 = short, 2 = long) */
1814 16, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_signed, /* complain_on_overflow */
1818 ppc64_elf_unhandled_reloc, /* special_function */
1819 "R_PPC64_GOT_TLSLD16_HA", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0xffff, /* dst_mask */
1823 FALSE), /* pcrel_offset */
1824
1825 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1826 the offset to the entry relative to the TOC base (r2). */
1827 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1828 0, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_signed, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_DS", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xfffc, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Like GOT_DTPREL16_DS, but no overflow. */
1842 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1843 0, /* rightshift */
1844 1, /* size (0 = byte, 1 = short, 2 = long) */
1845 16, /* bitsize */
1846 FALSE, /* pc_relative */
1847 0, /* bitpos */
1848 complain_overflow_dont, /* complain_on_overflow */
1849 ppc64_elf_unhandled_reloc, /* special_function */
1850 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1851 FALSE, /* partial_inplace */
1852 0, /* src_mask */
1853 0xfffc, /* dst_mask */
1854 FALSE), /* pcrel_offset */
1855
1856 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1857 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1858 16, /* rightshift */
1859 1, /* size (0 = byte, 1 = short, 2 = long) */
1860 16, /* bitsize */
1861 FALSE, /* pc_relative */
1862 0, /* bitpos */
1863 complain_overflow_signed, /* complain_on_overflow */
1864 ppc64_elf_unhandled_reloc, /* special_function */
1865 "R_PPC64_GOT_DTPREL16_HI", /* name */
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 0xffff, /* dst_mask */
1869 FALSE), /* pcrel_offset */
1870
1871 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1872 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1873 16, /* rightshift */
1874 1, /* size (0 = byte, 1 = short, 2 = long) */
1875 16, /* bitsize */
1876 FALSE, /* pc_relative */
1877 0, /* bitpos */
1878 complain_overflow_signed, /* complain_on_overflow */
1879 ppc64_elf_unhandled_reloc, /* special_function */
1880 "R_PPC64_GOT_DTPREL16_HA", /* name */
1881 FALSE, /* partial_inplace */
1882 0, /* src_mask */
1883 0xffff, /* dst_mask */
1884 FALSE), /* pcrel_offset */
1885
1886 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1887 offset to the entry relative to the TOC base (r2). */
1888 HOWTO (R_PPC64_GOT_TPREL16_DS,
1889 0, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_signed, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_DS", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xfffc, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 /* Like GOT_TPREL16_DS, but no overflow. */
1903 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1904 0, /* rightshift */
1905 1, /* size (0 = byte, 1 = short, 2 = long) */
1906 16, /* bitsize */
1907 FALSE, /* pc_relative */
1908 0, /* bitpos */
1909 complain_overflow_dont, /* complain_on_overflow */
1910 ppc64_elf_unhandled_reloc, /* special_function */
1911 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1912 FALSE, /* partial_inplace */
1913 0, /* src_mask */
1914 0xfffc, /* dst_mask */
1915 FALSE), /* pcrel_offset */
1916
1917 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1918 HOWTO (R_PPC64_GOT_TPREL16_HI,
1919 16, /* rightshift */
1920 1, /* size (0 = byte, 1 = short, 2 = long) */
1921 16, /* bitsize */
1922 FALSE, /* pc_relative */
1923 0, /* bitpos */
1924 complain_overflow_signed, /* complain_on_overflow */
1925 ppc64_elf_unhandled_reloc, /* special_function */
1926 "R_PPC64_GOT_TPREL16_HI", /* name */
1927 FALSE, /* partial_inplace */
1928 0, /* src_mask */
1929 0xffff, /* dst_mask */
1930 FALSE), /* pcrel_offset */
1931
1932 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1933 HOWTO (R_PPC64_GOT_TPREL16_HA,
1934 16, /* rightshift */
1935 1, /* size (0 = byte, 1 = short, 2 = long) */
1936 16, /* bitsize */
1937 FALSE, /* pc_relative */
1938 0, /* bitpos */
1939 complain_overflow_signed, /* complain_on_overflow */
1940 ppc64_elf_unhandled_reloc, /* special_function */
1941 "R_PPC64_GOT_TPREL16_HA", /* name */
1942 FALSE, /* partial_inplace */
1943 0, /* src_mask */
1944 0xffff, /* dst_mask */
1945 FALSE), /* pcrel_offset */
1946
1947 HOWTO (R_PPC64_JMP_IREL, /* type */
1948 0, /* rightshift */
1949 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1950 0, /* bitsize */
1951 FALSE, /* pc_relative */
1952 0, /* bitpos */
1953 complain_overflow_dont, /* complain_on_overflow */
1954 ppc64_elf_unhandled_reloc, /* special_function */
1955 "R_PPC64_JMP_IREL", /* name */
1956 FALSE, /* partial_inplace */
1957 0, /* src_mask */
1958 0, /* dst_mask */
1959 FALSE), /* pcrel_offset */
1960
1961 HOWTO (R_PPC64_IRELATIVE, /* type */
1962 0, /* rightshift */
1963 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1964 64, /* bitsize */
1965 FALSE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_IRELATIVE", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 ONES (64), /* dst_mask */
1973 FALSE), /* pcrel_offset */
1974
1975 /* A 16 bit relative relocation. */
1976 HOWTO (R_PPC64_REL16, /* type */
1977 0, /* rightshift */
1978 1, /* size (0 = byte, 1 = short, 2 = long) */
1979 16, /* bitsize */
1980 TRUE, /* pc_relative */
1981 0, /* bitpos */
1982 complain_overflow_signed, /* complain_on_overflow */
1983 bfd_elf_generic_reloc, /* special_function */
1984 "R_PPC64_REL16", /* name */
1985 FALSE, /* partial_inplace */
1986 0, /* src_mask */
1987 0xffff, /* dst_mask */
1988 TRUE), /* pcrel_offset */
1989
1990 /* A 16 bit relative relocation without overflow. */
1991 HOWTO (R_PPC64_REL16_LO, /* type */
1992 0, /* rightshift */
1993 1, /* size (0 = byte, 1 = short, 2 = long) */
1994 16, /* bitsize */
1995 TRUE, /* pc_relative */
1996 0, /* bitpos */
1997 complain_overflow_dont,/* complain_on_overflow */
1998 bfd_elf_generic_reloc, /* special_function */
1999 "R_PPC64_REL16_LO", /* name */
2000 FALSE, /* partial_inplace */
2001 0, /* src_mask */
2002 0xffff, /* dst_mask */
2003 TRUE), /* pcrel_offset */
2004
2005 /* The high order 16 bits of a relative address. */
2006 HOWTO (R_PPC64_REL16_HI, /* type */
2007 16, /* rightshift */
2008 1, /* size (0 = byte, 1 = short, 2 = long) */
2009 16, /* bitsize */
2010 TRUE, /* pc_relative */
2011 0, /* bitpos */
2012 complain_overflow_signed, /* complain_on_overflow */
2013 bfd_elf_generic_reloc, /* special_function */
2014 "R_PPC64_REL16_HI", /* name */
2015 FALSE, /* partial_inplace */
2016 0, /* src_mask */
2017 0xffff, /* dst_mask */
2018 TRUE), /* pcrel_offset */
2019
2020 /* The high order 16 bits of a relative address, plus 1 if the contents of
2021 the low 16 bits, treated as a signed number, is negative. */
2022 HOWTO (R_PPC64_REL16_HA, /* type */
2023 16, /* rightshift */
2024 1, /* size (0 = byte, 1 = short, 2 = long) */
2025 16, /* bitsize */
2026 TRUE, /* pc_relative */
2027 0, /* bitpos */
2028 complain_overflow_signed, /* complain_on_overflow */
2029 ppc64_elf_ha_reloc, /* special_function */
2030 "R_PPC64_REL16_HA", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 TRUE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2037 HOWTO (R_PPC64_REL16DX_HA, /* type */
2038 16, /* rightshift */
2039 2, /* size (0 = byte, 1 = short, 2 = long) */
2040 16, /* bitsize */
2041 TRUE, /* pc_relative */
2042 0, /* bitpos */
2043 complain_overflow_signed, /* complain_on_overflow */
2044 ppc64_elf_ha_reloc, /* special_function */
2045 "R_PPC64_REL16DX_HA", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0x1fffc1, /* dst_mask */
2049 TRUE), /* pcrel_offset */
2050
2051 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2052 HOWTO (R_PPC64_16DX_HA, /* type */
2053 16, /* rightshift */
2054 2, /* size (0 = byte, 1 = short, 2 = long) */
2055 16, /* bitsize */
2056 FALSE, /* pc_relative */
2057 0, /* bitpos */
2058 complain_overflow_signed, /* complain_on_overflow */
2059 ppc64_elf_ha_reloc, /* special_function */
2060 "R_PPC64_16DX_HA", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0x1fffc1, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2067 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2068 16, /* rightshift */
2069 1, /* size (0 = byte, 1 = short, 2 = long) */
2070 16, /* bitsize */
2071 FALSE, /* pc_relative */
2072 0, /* bitpos */
2073 complain_overflow_dont, /* complain_on_overflow */
2074 bfd_elf_generic_reloc, /* special_function */
2075 "R_PPC64_ADDR16_HIGH", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2082 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2083 16, /* rightshift */
2084 1, /* size (0 = byte, 1 = short, 2 = long) */
2085 16, /* bitsize */
2086 FALSE, /* pc_relative */
2087 0, /* bitpos */
2088 complain_overflow_dont, /* complain_on_overflow */
2089 ppc64_elf_ha_reloc, /* special_function */
2090 "R_PPC64_ADDR16_HIGHA", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0xffff, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2097 HOWTO (R_PPC64_DTPREL16_HIGH,
2098 16, /* rightshift */
2099 1, /* size (0 = byte, 1 = short, 2 = long) */
2100 16, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 ppc64_elf_unhandled_reloc, /* special_function */
2105 "R_PPC64_DTPREL16_HIGH", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 0xffff, /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110
2111 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2112 HOWTO (R_PPC64_DTPREL16_HIGHA,
2113 16, /* rightshift */
2114 1, /* size (0 = byte, 1 = short, 2 = long) */
2115 16, /* bitsize */
2116 FALSE, /* pc_relative */
2117 0, /* bitpos */
2118 complain_overflow_dont, /* complain_on_overflow */
2119 ppc64_elf_unhandled_reloc, /* special_function */
2120 "R_PPC64_DTPREL16_HIGHA", /* name */
2121 FALSE, /* partial_inplace */
2122 0, /* src_mask */
2123 0xffff, /* dst_mask */
2124 FALSE), /* pcrel_offset */
2125
2126 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2127 HOWTO (R_PPC64_TPREL16_HIGH,
2128 16, /* rightshift */
2129 1, /* size (0 = byte, 1 = short, 2 = long) */
2130 16, /* bitsize */
2131 FALSE, /* pc_relative */
2132 0, /* bitpos */
2133 complain_overflow_dont, /* complain_on_overflow */
2134 ppc64_elf_unhandled_reloc, /* special_function */
2135 "R_PPC64_TPREL16_HIGH", /* name */
2136 FALSE, /* partial_inplace */
2137 0, /* src_mask */
2138 0xffff, /* dst_mask */
2139 FALSE), /* pcrel_offset */
2140
2141 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2142 HOWTO (R_PPC64_TPREL16_HIGHA,
2143 16, /* rightshift */
2144 1, /* size (0 = byte, 1 = short, 2 = long) */
2145 16, /* bitsize */
2146 FALSE, /* pc_relative */
2147 0, /* bitpos */
2148 complain_overflow_dont, /* complain_on_overflow */
2149 ppc64_elf_unhandled_reloc, /* special_function */
2150 "R_PPC64_TPREL16_HIGHA", /* name */
2151 FALSE, /* partial_inplace */
2152 0, /* src_mask */
2153 0xffff, /* dst_mask */
2154 FALSE), /* pcrel_offset */
2155
2156 /* Marker reloc on ELFv2 large-model function entry. */
2157 HOWTO (R_PPC64_ENTRY,
2158 0, /* rightshift */
2159 2, /* size (0 = byte, 1 = short, 2 = long) */
2160 32, /* bitsize */
2161 FALSE, /* pc_relative */
2162 0, /* bitpos */
2163 complain_overflow_dont, /* complain_on_overflow */
2164 bfd_elf_generic_reloc, /* special_function */
2165 "R_PPC64_ENTRY", /* name */
2166 FALSE, /* partial_inplace */
2167 0, /* src_mask */
2168 0, /* dst_mask */
2169 FALSE), /* pcrel_offset */
2170
2171 /* Like ADDR64, but use local entry point of function. */
2172 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2173 0, /* rightshift */
2174 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2175 64, /* bitsize */
2176 FALSE, /* pc_relative */
2177 0, /* bitpos */
2178 complain_overflow_dont, /* complain_on_overflow */
2179 bfd_elf_generic_reloc, /* special_function */
2180 "R_PPC64_ADDR64_LOCAL", /* name */
2181 FALSE, /* partial_inplace */
2182 0, /* src_mask */
2183 ONES (64), /* dst_mask */
2184 FALSE), /* pcrel_offset */
2185
2186 /* GNU extension to record C++ vtable hierarchy. */
2187 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2188 0, /* rightshift */
2189 0, /* size (0 = byte, 1 = short, 2 = long) */
2190 0, /* bitsize */
2191 FALSE, /* pc_relative */
2192 0, /* bitpos */
2193 complain_overflow_dont, /* complain_on_overflow */
2194 NULL, /* special_function */
2195 "R_PPC64_GNU_VTINHERIT", /* name */
2196 FALSE, /* partial_inplace */
2197 0, /* src_mask */
2198 0, /* dst_mask */
2199 FALSE), /* pcrel_offset */
2200
2201 /* GNU extension to record C++ vtable member usage. */
2202 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2203 0, /* rightshift */
2204 0, /* size (0 = byte, 1 = short, 2 = long) */
2205 0, /* bitsize */
2206 FALSE, /* pc_relative */
2207 0, /* bitpos */
2208 complain_overflow_dont, /* complain_on_overflow */
2209 NULL, /* special_function */
2210 "R_PPC64_GNU_VTENTRY", /* name */
2211 FALSE, /* partial_inplace */
2212 0, /* src_mask */
2213 0, /* dst_mask */
2214 FALSE), /* pcrel_offset */
2215 };
2216
2217 \f
2218 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2219 be done. */
2220
2221 static void
2222 ppc_howto_init (void)
2223 {
2224 unsigned int i, type;
2225
2226 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2227 {
2228 type = ppc64_elf_howto_raw[i].type;
2229 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2230 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2231 }
2232 }
2233
2234 static reloc_howto_type *
2235 ppc64_elf_reloc_type_lookup (bfd *abfd,
2236 bfd_reloc_code_real_type code)
2237 {
2238 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2239
2240 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2241 /* Initialize howto table if needed. */
2242 ppc_howto_init ();
2243
2244 switch (code)
2245 {
2246 default:
2247 /* xgettext:c-format */
2248 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
2249 bfd_set_error (bfd_error_bad_value);
2250 return NULL;
2251
2252 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2253 break;
2254 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2255 break;
2256 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2257 break;
2258 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2259 break;
2260 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2261 break;
2262 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2263 break;
2264 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2265 break;
2266 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2267 break;
2268 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2269 break;
2270 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2271 break;
2272 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2273 break;
2274 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2275 break;
2276 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2277 break;
2278 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2279 break;
2280 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2281 break;
2282 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2283 break;
2284 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2285 break;
2286 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2287 break;
2288 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2289 break;
2290 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2291 break;
2292 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2293 break;
2294 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2295 break;
2296 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2297 break;
2298 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2299 break;
2300 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2301 break;
2302 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2303 break;
2304 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2305 break;
2306 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2307 break;
2308 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2309 break;
2310 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2311 break;
2312 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2313 break;
2314 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2315 break;
2316 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2317 break;
2318 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2319 break;
2320 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2321 break;
2322 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2323 break;
2324 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2325 break;
2326 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2327 break;
2328 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2329 break;
2330 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2331 break;
2332 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2333 break;
2334 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2335 break;
2336 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2337 break;
2338 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2339 break;
2340 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2341 break;
2342 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2343 break;
2344 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2345 break;
2346 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2347 break;
2348 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2349 break;
2350 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2351 break;
2352 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2353 break;
2354 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2355 break;
2356 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2357 break;
2358 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2359 break;
2360 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2361 break;
2362 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2363 break;
2364 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2365 break;
2366 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2367 break;
2368 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2369 break;
2370 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2371 break;
2372 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2373 break;
2374 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2375 break;
2376 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2377 break;
2378 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2379 break;
2380 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2381 break;
2382 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2383 break;
2384 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2385 break;
2386 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2387 break;
2388 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2389 break;
2390 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2391 break;
2392 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2393 break;
2394 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2395 break;
2396 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2397 break;
2398 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2399 break;
2400 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2401 break;
2402 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2403 break;
2404 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2405 break;
2406 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2407 break;
2408 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2409 break;
2410 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2411 break;
2412 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2413 break;
2414 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2415 break;
2416 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2417 break;
2418 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2419 break;
2420 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2421 break;
2422 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2423 break;
2424 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2425 break;
2426 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2427 break;
2428 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2429 break;
2430 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2431 break;
2432 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2433 break;
2434 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2435 break;
2436 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2437 break;
2438 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2439 break;
2440 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2441 break;
2442 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2443 break;
2444 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2445 break;
2446 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2447 break;
2448 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2449 break;
2450 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2451 break;
2452 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2453 break;
2454 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2455 break;
2456 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2457 break;
2458 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2459 break;
2460 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2461 break;
2462 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2463 break;
2464 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2465 break;
2466 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2467 break;
2468 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2469 break;
2470 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2471 break;
2472 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2473 break;
2474 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2475 break;
2476 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2477 break;
2478 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2479 break;
2480 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2481 break;
2482 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2483 break;
2484 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2485 break;
2486 }
2487
2488 return ppc64_elf_howto_table[r];
2489 };
2490
2491 static reloc_howto_type *
2492 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2493 const char *r_name)
2494 {
2495 unsigned int i;
2496
2497 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2498 if (ppc64_elf_howto_raw[i].name != NULL
2499 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2500 return &ppc64_elf_howto_raw[i];
2501
2502
2503 return NULL;
2504 }
2505
2506 /* Set the howto pointer for a PowerPC ELF reloc. */
2507
2508 static bfd_boolean
2509 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2510 Elf_Internal_Rela *dst)
2511 {
2512 unsigned int type;
2513
2514 /* Initialize howto table if needed. */
2515 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2516 ppc_howto_init ();
2517
2518 type = ELF64_R_TYPE (dst->r_info);
2519 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2520 {
2521 /* xgettext:c-format */
2522 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2523 abfd, type);
2524 bfd_set_error (bfd_error_bad_value);
2525 return FALSE;
2526 }
2527 cache_ptr->howto = ppc64_elf_howto_table[type];
2528 if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL)
2529 {
2530 /* xgettext:c-format */
2531 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2532 abfd, type);
2533 bfd_set_error (bfd_error_bad_value);
2534 return FALSE;
2535 }
2536
2537 return TRUE;
2538 }
2539
2540 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2541
2542 static bfd_reloc_status_type
2543 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2544 void *data, asection *input_section,
2545 bfd *output_bfd, char **error_message)
2546 {
2547 enum elf_ppc64_reloc_type r_type;
2548 long insn;
2549 bfd_size_type octets;
2550 bfd_vma value;
2551
2552 /* If this is a relocatable link (output_bfd test tells us), just
2553 call the generic function. Any adjustment will be done at final
2554 link time. */
2555 if (output_bfd != NULL)
2556 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2557 input_section, output_bfd, error_message);
2558
2559 /* Adjust the addend for sign extension of the low 16 bits.
2560 We won't actually be using the low 16 bits, so trashing them
2561 doesn't matter. */
2562 reloc_entry->addend += 0x8000;
2563 r_type = reloc_entry->howto->type;
2564 if (r_type != R_PPC64_REL16DX_HA)
2565 return bfd_reloc_continue;
2566
2567 value = 0;
2568 if (!bfd_is_com_section (symbol->section))
2569 value = symbol->value;
2570 value += (reloc_entry->addend
2571 + symbol->section->output_offset
2572 + symbol->section->output_section->vma);
2573 value -= (reloc_entry->address
2574 + input_section->output_offset
2575 + input_section->output_section->vma);
2576 value = (bfd_signed_vma) value >> 16;
2577
2578 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2579 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2580 insn &= ~0x1fffc1;
2581 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2582 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2583 if (value + 0x8000 > 0xffff)
2584 return bfd_reloc_overflow;
2585 return bfd_reloc_ok;
2586 }
2587
2588 static bfd_reloc_status_type
2589 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2590 void *data, asection *input_section,
2591 bfd *output_bfd, char **error_message)
2592 {
2593 if (output_bfd != NULL)
2594 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2595 input_section, output_bfd, error_message);
2596
2597 if (strcmp (symbol->section->name, ".opd") == 0
2598 && (symbol->section->owner->flags & DYNAMIC) == 0)
2599 {
2600 bfd_vma dest = opd_entry_value (symbol->section,
2601 symbol->value + reloc_entry->addend,
2602 NULL, NULL, FALSE);
2603 if (dest != (bfd_vma) -1)
2604 reloc_entry->addend = dest - (symbol->value
2605 + symbol->section->output_section->vma
2606 + symbol->section->output_offset);
2607 }
2608 else
2609 {
2610 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2611
2612 if (symbol->section->owner != abfd
2613 && symbol->section->owner != NULL
2614 && abiversion (symbol->section->owner) >= 2)
2615 {
2616 unsigned int i;
2617
2618 for (i = 0; i < symbol->section->owner->symcount; ++i)
2619 {
2620 asymbol *symdef = symbol->section->owner->outsymbols[i];
2621
2622 if (strcmp (symdef->name, symbol->name) == 0)
2623 {
2624 elfsym = (elf_symbol_type *) symdef;
2625 break;
2626 }
2627 }
2628 }
2629 reloc_entry->addend
2630 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2631 }
2632 return bfd_reloc_continue;
2633 }
2634
2635 static bfd_reloc_status_type
2636 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2637 void *data, asection *input_section,
2638 bfd *output_bfd, char **error_message)
2639 {
2640 long insn;
2641 enum elf_ppc64_reloc_type r_type;
2642 bfd_size_type octets;
2643 /* Assume 'at' branch hints. */
2644 bfd_boolean is_isa_v2 = TRUE;
2645
2646 /* If this is a relocatable link (output_bfd test tells us), just
2647 call the generic function. Any adjustment will be done at final
2648 link time. */
2649 if (output_bfd != NULL)
2650 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2651 input_section, output_bfd, error_message);
2652
2653 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2654 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2655 insn &= ~(0x01 << 21);
2656 r_type = reloc_entry->howto->type;
2657 if (r_type == R_PPC64_ADDR14_BRTAKEN
2658 || r_type == R_PPC64_REL14_BRTAKEN)
2659 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2660
2661 if (is_isa_v2)
2662 {
2663 /* Set 'a' bit. This is 0b00010 in BO field for branch
2664 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2665 for branch on CTR insns (BO == 1a00t or 1a01t). */
2666 if ((insn & (0x14 << 21)) == (0x04 << 21))
2667 insn |= 0x02 << 21;
2668 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2669 insn |= 0x08 << 21;
2670 else
2671 goto out;
2672 }
2673 else
2674 {
2675 bfd_vma target = 0;
2676 bfd_vma from;
2677
2678 if (!bfd_is_com_section (symbol->section))
2679 target = symbol->value;
2680 target += symbol->section->output_section->vma;
2681 target += symbol->section->output_offset;
2682 target += reloc_entry->addend;
2683
2684 from = (reloc_entry->address
2685 + input_section->output_offset
2686 + input_section->output_section->vma);
2687
2688 /* Invert 'y' bit if not the default. */
2689 if ((bfd_signed_vma) (target - from) < 0)
2690 insn ^= 0x01 << 21;
2691 }
2692 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2693 out:
2694 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2695 input_section, output_bfd, error_message);
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712 return bfd_reloc_continue;
2713 }
2714
2715 static bfd_reloc_status_type
2716 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2717 void *data, asection *input_section,
2718 bfd *output_bfd, char **error_message)
2719 {
2720 /* If this is a relocatable link (output_bfd test tells us), just
2721 call the generic function. Any adjustment will be done at final
2722 link time. */
2723 if (output_bfd != NULL)
2724 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2725 input_section, output_bfd, error_message);
2726
2727 /* Subtract the symbol section base address. */
2728 reloc_entry->addend -= symbol->section->output_section->vma;
2729
2730 /* Adjust the addend for sign extension of the low 16 bits. */
2731 reloc_entry->addend += 0x8000;
2732 return bfd_reloc_continue;
2733 }
2734
2735 static bfd_reloc_status_type
2736 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2737 void *data, asection *input_section,
2738 bfd *output_bfd, char **error_message)
2739 {
2740 bfd_vma TOCstart;
2741
2742 /* If this is a relocatable link (output_bfd test tells us), just
2743 call the generic function. Any adjustment will be done at final
2744 link time. */
2745 if (output_bfd != NULL)
2746 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2747 input_section, output_bfd, error_message);
2748
2749 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2750 if (TOCstart == 0)
2751 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2752
2753 /* Subtract the TOC base address. */
2754 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2755 return bfd_reloc_continue;
2756 }
2757
2758 static bfd_reloc_status_type
2759 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2760 void *data, asection *input_section,
2761 bfd *output_bfd, char **error_message)
2762 {
2763 bfd_vma TOCstart;
2764
2765 /* If this is a relocatable link (output_bfd test tells us), just
2766 call the generic function. Any adjustment will be done at final
2767 link time. */
2768 if (output_bfd != NULL)
2769 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2770 input_section, output_bfd, error_message);
2771
2772 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2773 if (TOCstart == 0)
2774 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2775
2776 /* Subtract the TOC base address. */
2777 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2778
2779 /* Adjust the addend for sign extension of the low 16 bits. */
2780 reloc_entry->addend += 0x8000;
2781 return bfd_reloc_continue;
2782 }
2783
2784 static bfd_reloc_status_type
2785 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2786 void *data, asection *input_section,
2787 bfd *output_bfd, char **error_message)
2788 {
2789 bfd_vma TOCstart;
2790 bfd_size_type octets;
2791
2792 /* If this is a relocatable link (output_bfd test tells us), just
2793 call the generic function. Any adjustment will be done at final
2794 link time. */
2795 if (output_bfd != NULL)
2796 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2797 input_section, output_bfd, error_message);
2798
2799 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2800 if (TOCstart == 0)
2801 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2802
2803 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2804 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2805 return bfd_reloc_ok;
2806 }
2807
2808 static bfd_reloc_status_type
2809 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2810 void *data, asection *input_section,
2811 bfd *output_bfd, char **error_message)
2812 {
2813 /* If this is a relocatable link (output_bfd test tells us), just
2814 call the generic function. Any adjustment will be done at final
2815 link time. */
2816 if (output_bfd != NULL)
2817 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2818 input_section, output_bfd, error_message);
2819
2820 if (error_message != NULL)
2821 {
2822 static char buf[60];
2823 sprintf (buf, "generic linker can't handle %s",
2824 reloc_entry->howto->name);
2825 *error_message = buf;
2826 }
2827 return bfd_reloc_dangerous;
2828 }
2829
2830 /* Track GOT entries needed for a given symbol. We might need more
2831 than one got entry per symbol. */
2832 struct got_entry
2833 {
2834 struct got_entry *next;
2835
2836 /* The symbol addend that we'll be placing in the GOT. */
2837 bfd_vma addend;
2838
2839 /* Unlike other ELF targets, we use separate GOT entries for the same
2840 symbol referenced from different input files. This is to support
2841 automatic multiple TOC/GOT sections, where the TOC base can vary
2842 from one input file to another. After partitioning into TOC groups
2843 we merge entries within the group.
2844
2845 Point to the BFD owning this GOT entry. */
2846 bfd *owner;
2847
2848 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2849 TLS_TPREL or TLS_DTPREL for tls entries. */
2850 unsigned char tls_type;
2851
2852 /* Non-zero if got.ent points to real entry. */
2853 unsigned char is_indirect;
2854
2855 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2856 union
2857 {
2858 bfd_signed_vma refcount;
2859 bfd_vma offset;
2860 struct got_entry *ent;
2861 } got;
2862 };
2863
2864 /* The same for PLT. */
2865 struct plt_entry
2866 {
2867 struct plt_entry *next;
2868
2869 bfd_vma addend;
2870
2871 union
2872 {
2873 bfd_signed_vma refcount;
2874 bfd_vma offset;
2875 } plt;
2876 };
2877
2878 struct ppc64_elf_obj_tdata
2879 {
2880 struct elf_obj_tdata elf;
2881
2882 /* Shortcuts to dynamic linker sections. */
2883 asection *got;
2884 asection *relgot;
2885
2886 /* Used during garbage collection. We attach global symbols defined
2887 on removed .opd entries to this section so that the sym is removed. */
2888 asection *deleted_section;
2889
2890 /* TLS local dynamic got entry handling. Support for multiple GOT
2891 sections means we potentially need one of these for each input bfd. */
2892 struct got_entry tlsld_got;
2893
2894 union {
2895 /* A copy of relocs before they are modified for --emit-relocs. */
2896 Elf_Internal_Rela *relocs;
2897
2898 /* Section contents. */
2899 bfd_byte *contents;
2900 } opd;
2901
2902 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2903 the reloc to be in the range -32768 to 32767. */
2904 unsigned int has_small_toc_reloc : 1;
2905
2906 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2907 instruction not one we handle. */
2908 unsigned int unexpected_toc_insn : 1;
2909 };
2910
2911 #define ppc64_elf_tdata(bfd) \
2912 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2913
2914 #define ppc64_tlsld_got(bfd) \
2915 (&ppc64_elf_tdata (bfd)->tlsld_got)
2916
2917 #define is_ppc64_elf(bfd) \
2918 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2919 && elf_object_id (bfd) == PPC64_ELF_DATA)
2920
2921 /* Override the generic function because we store some extras. */
2922
2923 static bfd_boolean
2924 ppc64_elf_mkobject (bfd *abfd)
2925 {
2926 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2927 PPC64_ELF_DATA);
2928 }
2929
2930 /* Fix bad default arch selected for a 64 bit input bfd when the
2931 default is 32 bit. Also select arch based on apuinfo. */
2932
2933 static bfd_boolean
2934 ppc64_elf_object_p (bfd *abfd)
2935 {
2936 if (!abfd->arch_info->the_default)
2937 return TRUE;
2938
2939 if (abfd->arch_info->bits_per_word == 32)
2940 {
2941 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2942
2943 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2944 {
2945 /* Relies on arch after 32 bit default being 64 bit default. */
2946 abfd->arch_info = abfd->arch_info->next;
2947 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2948 }
2949 }
2950 return _bfd_elf_ppc_set_arch (abfd);
2951 }
2952
2953 /* Support for core dump NOTE sections. */
2954
2955 static bfd_boolean
2956 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2957 {
2958 size_t offset, size;
2959
2960 if (note->descsz != 504)
2961 return FALSE;
2962
2963 /* pr_cursig */
2964 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2965
2966 /* pr_pid */
2967 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2968
2969 /* pr_reg */
2970 offset = 112;
2971 size = 384;
2972
2973 /* Make a ".reg/999" section. */
2974 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2975 size, note->descpos + offset);
2976 }
2977
2978 static bfd_boolean
2979 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2980 {
2981 if (note->descsz != 136)
2982 return FALSE;
2983
2984 elf_tdata (abfd)->core->pid
2985 = bfd_get_32 (abfd, note->descdata + 24);
2986 elf_tdata (abfd)->core->program
2987 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2988 elf_tdata (abfd)->core->command
2989 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2990
2991 return TRUE;
2992 }
2993
2994 static char *
2995 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2996 ...)
2997 {
2998 switch (note_type)
2999 {
3000 default:
3001 return NULL;
3002
3003 case NT_PRPSINFO:
3004 {
3005 char data[136];
3006 va_list ap;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, sizeof (data));
3010 strncpy (data + 40, va_arg (ap, const char *), 16);
3011 strncpy (data + 56, va_arg (ap, const char *), 80);
3012 va_end (ap);
3013 return elfcore_write_note (abfd, buf, bufsiz,
3014 "CORE", note_type, data, sizeof (data));
3015 }
3016
3017 case NT_PRSTATUS:
3018 {
3019 char data[504];
3020 va_list ap;
3021 long pid;
3022 int cursig;
3023 const void *greg;
3024
3025 va_start (ap, note_type);
3026 memset (data, 0, 112);
3027 pid = va_arg (ap, long);
3028 bfd_put_32 (abfd, pid, data + 32);
3029 cursig = va_arg (ap, int);
3030 bfd_put_16 (abfd, cursig, data + 12);
3031 greg = va_arg (ap, const void *);
3032 memcpy (data + 112, greg, 384);
3033 memset (data + 496, 0, 8);
3034 va_end (ap);
3035 return elfcore_write_note (abfd, buf, bufsiz,
3036 "CORE", note_type, data, sizeof (data));
3037 }
3038 }
3039 }
3040
3041 /* Add extra PPC sections. */
3042
3043 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3044 {
3045 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3046 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3047 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3048 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3049 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3050 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3051 { NULL, 0, 0, 0, 0 }
3052 };
3053
3054 enum _ppc64_sec_type {
3055 sec_normal = 0,
3056 sec_opd = 1,
3057 sec_toc = 2
3058 };
3059
3060 struct _ppc64_elf_section_data
3061 {
3062 struct bfd_elf_section_data elf;
3063
3064 union
3065 {
3066 /* An array with one entry for each opd function descriptor,
3067 and some spares since opd entries may be either 16 or 24 bytes. */
3068 #define OPD_NDX(OFF) ((OFF) >> 4)
3069 struct _opd_sec_data
3070 {
3071 /* Points to the function code section for local opd entries. */
3072 asection **func_sec;
3073
3074 /* After editing .opd, adjust references to opd local syms. */
3075 long *adjust;
3076 } opd;
3077
3078 /* An array for toc sections, indexed by offset/8. */
3079 struct _toc_sec_data
3080 {
3081 /* Specifies the relocation symbol index used at a given toc offset. */
3082 unsigned *symndx;
3083
3084 /* And the relocation addend. */
3085 bfd_vma *add;
3086 } toc;
3087 } u;
3088
3089 enum _ppc64_sec_type sec_type:2;
3090
3091 /* Flag set when small branches are detected. Used to
3092 select suitable defaults for the stub group size. */
3093 unsigned int has_14bit_branch:1;
3094 };
3095
3096 #define ppc64_elf_section_data(sec) \
3097 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3098
3099 static bfd_boolean
3100 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3101 {
3102 if (!sec->used_by_bfd)
3103 {
3104 struct _ppc64_elf_section_data *sdata;
3105 bfd_size_type amt = sizeof (*sdata);
3106
3107 sdata = bfd_zalloc (abfd, amt);
3108 if (sdata == NULL)
3109 return FALSE;
3110 sec->used_by_bfd = sdata;
3111 }
3112
3113 return _bfd_elf_new_section_hook (abfd, sec);
3114 }
3115
3116 static struct _opd_sec_data *
3117 get_opd_info (asection * sec)
3118 {
3119 if (sec != NULL
3120 && ppc64_elf_section_data (sec) != NULL
3121 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3122 return &ppc64_elf_section_data (sec)->u.opd;
3123 return NULL;
3124 }
3125 \f
3126 /* Parameters for the qsort hook. */
3127 static bfd_boolean synthetic_relocatable;
3128 static asection *synthetic_opd;
3129
3130 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3131
3132 static int
3133 compare_symbols (const void *ap, const void *bp)
3134 {
3135 const asymbol *a = * (const asymbol **) ap;
3136 const asymbol *b = * (const asymbol **) bp;
3137
3138 /* Section symbols first. */
3139 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3140 return -1;
3141 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3142 return 1;
3143
3144 /* then .opd symbols. */
3145 if (synthetic_opd != NULL)
3146 {
3147 if (strcmp (a->section->name, ".opd") == 0
3148 && strcmp (b->section->name, ".opd") != 0)
3149 return -1;
3150 if (strcmp (a->section->name, ".opd") != 0
3151 && strcmp (b->section->name, ".opd") == 0)
3152 return 1;
3153 }
3154
3155 /* then other code symbols. */
3156 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3157 == (SEC_CODE | SEC_ALLOC)
3158 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3159 != (SEC_CODE | SEC_ALLOC))
3160 return -1;
3161
3162 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3163 != (SEC_CODE | SEC_ALLOC)
3164 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3165 == (SEC_CODE | SEC_ALLOC))
3166 return 1;
3167
3168 if (synthetic_relocatable)
3169 {
3170 if (a->section->id < b->section->id)
3171 return -1;
3172
3173 if (a->section->id > b->section->id)
3174 return 1;
3175 }
3176
3177 if (a->value + a->section->vma < b->value + b->section->vma)
3178 return -1;
3179
3180 if (a->value + a->section->vma > b->value + b->section->vma)
3181 return 1;
3182
3183 /* For syms with the same value, prefer strong dynamic global function
3184 syms over other syms. */
3185 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3186 return -1;
3187
3188 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3189 return 1;
3190
3191 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3192 return -1;
3193
3194 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3195 return 1;
3196
3197 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3198 return -1;
3199
3200 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3201 return 1;
3202
3203 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3204 return -1;
3205
3206 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3207 return 1;
3208
3209 return a > b;
3210 }
3211
3212 /* Search SYMS for a symbol of the given VALUE. */
3213
3214 static asymbol *
3215 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3216 {
3217 long mid;
3218
3219 if (id == (unsigned) -1)
3220 {
3221 while (lo < hi)
3222 {
3223 mid = (lo + hi) >> 1;
3224 if (syms[mid]->value + syms[mid]->section->vma < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value + syms[mid]->section->vma > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 else
3233 {
3234 while (lo < hi)
3235 {
3236 mid = (lo + hi) >> 1;
3237 if (syms[mid]->section->id < id)
3238 lo = mid + 1;
3239 else if (syms[mid]->section->id > id)
3240 hi = mid;
3241 else if (syms[mid]->value < value)
3242 lo = mid + 1;
3243 else if (syms[mid]->value > value)
3244 hi = mid;
3245 else
3246 return syms[mid];
3247 }
3248 }
3249 return NULL;
3250 }
3251
3252 static bfd_boolean
3253 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3254 {
3255 bfd_vma vma = *(bfd_vma *) ptr;
3256 return ((section->flags & SEC_ALLOC) != 0
3257 && section->vma <= vma
3258 && vma < section->vma + section->size);
3259 }
3260
3261 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3262 entry syms. Also generate @plt symbols for the glink branch table.
3263 Returns count of synthetic symbols in RET or -1 on error. */
3264
3265 static long
3266 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3267 long static_count, asymbol **static_syms,
3268 long dyn_count, asymbol **dyn_syms,
3269 asymbol **ret)
3270 {
3271 asymbol *s;
3272 long i;
3273 long count;
3274 char *names;
3275 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3276 asection *opd = NULL;
3277 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3278 asymbol **syms;
3279 int abi = abiversion (abfd);
3280
3281 *ret = NULL;
3282
3283 if (abi < 2)
3284 {
3285 opd = bfd_get_section_by_name (abfd, ".opd");
3286 if (opd == NULL && abi == 1)
3287 return 0;
3288 }
3289
3290 syms = NULL;
3291 codesecsym = 0;
3292 codesecsymend = 0;
3293 secsymend = 0;
3294 opdsymend = 0;
3295 symcount = 0;
3296 if (opd != NULL)
3297 {
3298 symcount = static_count;
3299 if (!relocatable)
3300 symcount += dyn_count;
3301 if (symcount == 0)
3302 return 0;
3303
3304 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3305 if (syms == NULL)
3306 return -1;
3307
3308 if (!relocatable && static_count != 0 && dyn_count != 0)
3309 {
3310 /* Use both symbol tables. */
3311 memcpy (syms, static_syms, static_count * sizeof (*syms));
3312 memcpy (syms + static_count, dyn_syms,
3313 (dyn_count + 1) * sizeof (*syms));
3314 }
3315 else if (!relocatable && static_count == 0)
3316 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3317 else
3318 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3319
3320 synthetic_relocatable = relocatable;
3321 synthetic_opd = opd;
3322 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3323
3324 if (!relocatable && symcount > 1)
3325 {
3326 long j;
3327 /* Trim duplicate syms, since we may have merged the normal and
3328 dynamic symbols. Actually, we only care about syms that have
3329 different values, so trim any with the same value. */
3330 for (i = 1, j = 1; i < symcount; ++i)
3331 if (syms[i - 1]->value + syms[i - 1]->section->vma
3332 != syms[i]->value + syms[i]->section->vma)
3333 syms[j++] = syms[i];
3334 symcount = j;
3335 }
3336
3337 i = 0;
3338 /* Note that here and in compare_symbols we can't compare opd and
3339 sym->section directly. With separate debug info files, the
3340 symbols will be extracted from the debug file while abfd passed
3341 to this function is the real binary. */
3342 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3343 ++i;
3344 codesecsym = i;
3345
3346 for (; i < symcount; ++i)
3347 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3348 | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3351 break;
3352 codesecsymend = i;
3353
3354 for (; i < symcount; ++i)
3355 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3356 break;
3357 secsymend = i;
3358
3359 for (; i < symcount; ++i)
3360 if (strcmp (syms[i]->section->name, ".opd") != 0)
3361 break;
3362 opdsymend = i;
3363
3364 for (; i < symcount; ++i)
3365 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3366 != (SEC_CODE | SEC_ALLOC))
3367 break;
3368 symcount = i;
3369 }
3370 count = 0;
3371
3372 if (relocatable)
3373 {
3374 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3375 arelent *r;
3376 size_t size;
3377 long relcount;
3378
3379 if (opdsymend == secsymend)
3380 goto done;
3381
3382 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3383 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3384 if (relcount == 0)
3385 goto done;
3386
3387 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3388 {
3389 count = -1;
3390 goto done;
3391 }
3392
3393 size = 0;
3394 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3395 {
3396 asymbol *sym;
3397
3398 while (r < opd->relocation + relcount
3399 && r->address < syms[i]->value + opd->vma)
3400 ++r;
3401
3402 if (r == opd->relocation + relcount)
3403 break;
3404
3405 if (r->address != syms[i]->value + opd->vma)
3406 continue;
3407
3408 if (r->howto->type != R_PPC64_ADDR64)
3409 continue;
3410
3411 sym = *r->sym_ptr_ptr;
3412 if (!sym_exists_at (syms, opdsymend, symcount,
3413 sym->section->id, sym->value + r->addend))
3414 {
3415 ++count;
3416 size += sizeof (asymbol);
3417 size += strlen (syms[i]->name) + 2;
3418 }
3419 }
3420
3421 if (size == 0)
3422 goto done;
3423 s = *ret = bfd_malloc (size);
3424 if (s == NULL)
3425 {
3426 count = -1;
3427 goto done;
3428 }
3429
3430 names = (char *) (s + count);
3431
3432 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3433 {
3434 asymbol *sym;
3435
3436 while (r < opd->relocation + relcount
3437 && r->address < syms[i]->value + opd->vma)
3438 ++r;
3439
3440 if (r == opd->relocation + relcount)
3441 break;
3442
3443 if (r->address != syms[i]->value + opd->vma)
3444 continue;
3445
3446 if (r->howto->type != R_PPC64_ADDR64)
3447 continue;
3448
3449 sym = *r->sym_ptr_ptr;
3450 if (!sym_exists_at (syms, opdsymend, symcount,
3451 sym->section->id, sym->value + r->addend))
3452 {
3453 size_t len;
3454
3455 *s = *syms[i];
3456 s->flags |= BSF_SYNTHETIC;
3457 s->section = sym->section;
3458 s->value = sym->value + r->addend;
3459 s->name = names;
3460 *names++ = '.';
3461 len = strlen (syms[i]->name);
3462 memcpy (names, syms[i]->name, len + 1);
3463 names += len + 1;
3464 /* Have udata.p point back to the original symbol this
3465 synthetic symbol was derived from. */
3466 s->udata.p = syms[i];
3467 s++;
3468 }
3469 }
3470 }
3471 else
3472 {
3473 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3474 bfd_byte *contents = NULL;
3475 size_t size;
3476 long plt_count = 0;
3477 bfd_vma glink_vma = 0, resolv_vma = 0;
3478 asection *dynamic, *glink = NULL, *relplt = NULL;
3479 arelent *p;
3480
3481 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3482 {
3483 free_contents_and_exit_err:
3484 count = -1;
3485 free_contents_and_exit:
3486 if (contents)
3487 free (contents);
3488 goto done;
3489 }
3490
3491 size = 0;
3492 for (i = secsymend; i < opdsymend; ++i)
3493 {
3494 bfd_vma ent;
3495
3496 /* Ignore bogus symbols. */
3497 if (syms[i]->value > opd->size - 8)
3498 continue;
3499
3500 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3501 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3502 {
3503 ++count;
3504 size += sizeof (asymbol);
3505 size += strlen (syms[i]->name) + 2;
3506 }
3507 }
3508
3509 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3510 if (dyn_count != 0
3511 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3512 {
3513 bfd_byte *dynbuf, *extdyn, *extdynend;
3514 size_t extdynsize;
3515 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3516
3517 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3518 goto free_contents_and_exit_err;
3519
3520 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3521 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3522
3523 extdyn = dynbuf;
3524 extdynend = extdyn + dynamic->size;
3525 for (; extdyn < extdynend; extdyn += extdynsize)
3526 {
3527 Elf_Internal_Dyn dyn;
3528 (*swap_dyn_in) (abfd, extdyn, &dyn);
3529
3530 if (dyn.d_tag == DT_NULL)
3531 break;
3532
3533 if (dyn.d_tag == DT_PPC64_GLINK)
3534 {
3535 /* The first glink stub starts at DT_PPC64_GLINK plus 32.
3536 See comment in ppc64_elf_finish_dynamic_sections. */
3537 glink_vma = dyn.d_un.d_val + 8 * 4;
3538 /* The .glink section usually does not survive the final
3539 link; search for the section (usually .text) where the
3540 glink stubs now reside. */
3541 glink = bfd_sections_find_if (abfd, section_covers_vma,
3542 &glink_vma);
3543 break;
3544 }
3545 }
3546
3547 free (dynbuf);
3548 }
3549
3550 if (glink != NULL)
3551 {
3552 /* Determine __glink trampoline by reading the relative branch
3553 from the first glink stub. */
3554 bfd_byte buf[4];
3555 unsigned int off = 0;
3556
3557 while (bfd_get_section_contents (abfd, glink, buf,
3558 glink_vma + off - glink->vma, 4))
3559 {
3560 unsigned int insn = bfd_get_32 (abfd, buf);
3561 insn ^= B_DOT;
3562 if ((insn & ~0x3fffffc) == 0)
3563 {
3564 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3565 break;
3566 }
3567 off += 4;
3568 if (off > 4)
3569 break;
3570 }
3571
3572 if (resolv_vma)
3573 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3574
3575 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3576 if (relplt != NULL)
3577 {
3578 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3579 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3580 goto free_contents_and_exit_err;
3581
3582 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3583 size += plt_count * sizeof (asymbol);
3584
3585 p = relplt->relocation;
3586 for (i = 0; i < plt_count; i++, p++)
3587 {
3588 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3589 if (p->addend != 0)
3590 size += sizeof ("+0x") - 1 + 16;
3591 }
3592 }
3593 }
3594
3595 if (size == 0)
3596 goto free_contents_and_exit;
3597 s = *ret = bfd_malloc (size);
3598 if (s == NULL)
3599 goto free_contents_and_exit_err;
3600
3601 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3602
3603 for (i = secsymend; i < opdsymend; ++i)
3604 {
3605 bfd_vma ent;
3606
3607 if (syms[i]->value > opd->size - 8)
3608 continue;
3609
3610 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3611 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3612 {
3613 long lo, hi;
3614 size_t len;
3615 asection *sec = abfd->sections;
3616
3617 *s = *syms[i];
3618 lo = codesecsym;
3619 hi = codesecsymend;
3620 while (lo < hi)
3621 {
3622 long mid = (lo + hi) >> 1;
3623 if (syms[mid]->section->vma < ent)
3624 lo = mid + 1;
3625 else if (syms[mid]->section->vma > ent)
3626 hi = mid;
3627 else
3628 {
3629 sec = syms[mid]->section;
3630 break;
3631 }
3632 }
3633
3634 if (lo >= hi && lo > codesecsym)
3635 sec = syms[lo - 1]->section;
3636
3637 for (; sec != NULL; sec = sec->next)
3638 {
3639 if (sec->vma > ent)
3640 break;
3641 /* SEC_LOAD may not be set if SEC is from a separate debug
3642 info file. */
3643 if ((sec->flags & SEC_ALLOC) == 0)
3644 break;
3645 if ((sec->flags & SEC_CODE) != 0)
3646 s->section = sec;
3647 }
3648 s->flags |= BSF_SYNTHETIC;
3649 s->value = ent - s->section->vma;
3650 s->name = names;
3651 *names++ = '.';
3652 len = strlen (syms[i]->name);
3653 memcpy (names, syms[i]->name, len + 1);
3654 names += len + 1;
3655 /* Have udata.p point back to the original symbol this
3656 synthetic symbol was derived from. */
3657 s->udata.p = syms[i];
3658 s++;
3659 }
3660 }
3661 free (contents);
3662
3663 if (glink != NULL && relplt != NULL)
3664 {
3665 if (resolv_vma)
3666 {
3667 /* Add a symbol for the main glink trampoline. */
3668 memset (s, 0, sizeof *s);
3669 s->the_bfd = abfd;
3670 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3671 s->section = glink;
3672 s->value = resolv_vma - glink->vma;
3673 s->name = names;
3674 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3675 names += sizeof ("__glink_PLTresolve");
3676 s++;
3677 count++;
3678 }
3679
3680 /* FIXME: It would be very much nicer to put sym@plt on the
3681 stub rather than on the glink branch table entry. The
3682 objdump disassembler would then use a sensible symbol
3683 name on plt calls. The difficulty in doing so is
3684 a) finding the stubs, and,
3685 b) matching stubs against plt entries, and,
3686 c) there can be multiple stubs for a given plt entry.
3687
3688 Solving (a) could be done by code scanning, but older
3689 ppc64 binaries used different stubs to current code.
3690 (b) is the tricky one since you need to known the toc
3691 pointer for at least one function that uses a pic stub to
3692 be able to calculate the plt address referenced.
3693 (c) means gdb would need to set multiple breakpoints (or
3694 find the glink branch itself) when setting breakpoints
3695 for pending shared library loads. */
3696 p = relplt->relocation;
3697 for (i = 0; i < plt_count; i++, p++)
3698 {
3699 size_t len;
3700
3701 *s = **p->sym_ptr_ptr;
3702 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3703 we are defining a symbol, ensure one of them is set. */
3704 if ((s->flags & BSF_LOCAL) == 0)
3705 s->flags |= BSF_GLOBAL;
3706 s->flags |= BSF_SYNTHETIC;
3707 s->section = glink;
3708 s->value = glink_vma - glink->vma;
3709 s->name = names;
3710 s->udata.p = NULL;
3711 len = strlen ((*p->sym_ptr_ptr)->name);
3712 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3713 names += len;
3714 if (p->addend != 0)
3715 {
3716 memcpy (names, "+0x", sizeof ("+0x") - 1);
3717 names += sizeof ("+0x") - 1;
3718 bfd_sprintf_vma (abfd, names, p->addend);
3719 names += strlen (names);
3720 }
3721 memcpy (names, "@plt", sizeof ("@plt"));
3722 names += sizeof ("@plt");
3723 s++;
3724 if (abi < 2)
3725 {
3726 glink_vma += 8;
3727 if (i >= 0x8000)
3728 glink_vma += 4;
3729 }
3730 else
3731 glink_vma += 4;
3732 }
3733 count += plt_count;
3734 }
3735 }
3736
3737 done:
3738 free (syms);
3739 return count;
3740 }
3741 \f
3742 /* The following functions are specific to the ELF linker, while
3743 functions above are used generally. Those named ppc64_elf_* are
3744 called by the main ELF linker code. They appear in this file more
3745 or less in the order in which they are called. eg.
3746 ppc64_elf_check_relocs is called early in the link process,
3747 ppc64_elf_finish_dynamic_sections is one of the last functions
3748 called.
3749
3750 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3751 functions have both a function code symbol and a function descriptor
3752 symbol. A call to foo in a relocatable object file looks like:
3753
3754 . .text
3755 . x:
3756 . bl .foo
3757 . nop
3758
3759 The function definition in another object file might be:
3760
3761 . .section .opd
3762 . foo: .quad .foo
3763 . .quad .TOC.@tocbase
3764 . .quad 0
3765 .
3766 . .text
3767 . .foo: blr
3768
3769 When the linker resolves the call during a static link, the branch
3770 unsurprisingly just goes to .foo and the .opd information is unused.
3771 If the function definition is in a shared library, things are a little
3772 different: The call goes via a plt call stub, the opd information gets
3773 copied to the plt, and the linker patches the nop.
3774
3775 . x:
3776 . bl .foo_stub
3777 . ld 2,40(1)
3778 .
3779 .
3780 . .foo_stub:
3781 . std 2,40(1) # in practice, the call stub
3782 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3783 . addi 11,11,Lfoo@toc@l # this is the general idea
3784 . ld 12,0(11)
3785 . ld 2,8(11)
3786 . mtctr 12
3787 . ld 11,16(11)
3788 . bctr
3789 .
3790 . .section .plt
3791 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3792
3793 The "reloc ()" notation is supposed to indicate that the linker emits
3794 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3795 copying.
3796
3797 What are the difficulties here? Well, firstly, the relocations
3798 examined by the linker in check_relocs are against the function code
3799 sym .foo, while the dynamic relocation in the plt is emitted against
3800 the function descriptor symbol, foo. Somewhere along the line, we need
3801 to carefully copy dynamic link information from one symbol to the other.
3802 Secondly, the generic part of the elf linker will make .foo a dynamic
3803 symbol as is normal for most other backends. We need foo dynamic
3804 instead, at least for an application final link. However, when
3805 creating a shared library containing foo, we need to have both symbols
3806 dynamic so that references to .foo are satisfied during the early
3807 stages of linking. Otherwise the linker might decide to pull in a
3808 definition from some other object, eg. a static library.
3809
3810 Update: As of August 2004, we support a new convention. Function
3811 calls may use the function descriptor symbol, ie. "bl foo". This
3812 behaves exactly as "bl .foo". */
3813
3814 /* Of those relocs that might be copied as dynamic relocs, this
3815 function selects those that must be copied when linking a shared
3816 library or PIE, even when the symbol is local. */
3817
3818 static int
3819 must_be_dyn_reloc (struct bfd_link_info *info,
3820 enum elf_ppc64_reloc_type r_type)
3821 {
3822 switch (r_type)
3823 {
3824 default:
3825 /* Only relative relocs can be resolved when the object load
3826 address isn't fixed. DTPREL64 is excluded because the
3827 dynamic linker needs to differentiate global dynamic from
3828 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3829 return 1;
3830
3831 case R_PPC64_REL32:
3832 case R_PPC64_REL64:
3833 case R_PPC64_REL30:
3834 return 0;
3835
3836 case R_PPC64_TPREL16:
3837 case R_PPC64_TPREL16_LO:
3838 case R_PPC64_TPREL16_HI:
3839 case R_PPC64_TPREL16_HA:
3840 case R_PPC64_TPREL16_DS:
3841 case R_PPC64_TPREL16_LO_DS:
3842 case R_PPC64_TPREL16_HIGH:
3843 case R_PPC64_TPREL16_HIGHA:
3844 case R_PPC64_TPREL16_HIGHER:
3845 case R_PPC64_TPREL16_HIGHERA:
3846 case R_PPC64_TPREL16_HIGHEST:
3847 case R_PPC64_TPREL16_HIGHESTA:
3848 case R_PPC64_TPREL64:
3849 /* These relocations are relative but in a shared library the
3850 linker doesn't know the thread pointer base. */
3851 return bfd_link_dll (info);
3852 }
3853 }
3854
3855 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3856 copying dynamic variables from a shared lib into an app's dynbss
3857 section, and instead use a dynamic relocation to point into the
3858 shared lib. With code that gcc generates, it's vital that this be
3859 enabled; In the PowerPC64 ABI, the address of a function is actually
3860 the address of a function descriptor, which resides in the .opd
3861 section. gcc uses the descriptor directly rather than going via the
3862 GOT as some other ABI's do, which means that initialized function
3863 pointers must reference the descriptor. Thus, a function pointer
3864 initialized to the address of a function in a shared library will
3865 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3866 redefines the function descriptor symbol to point to the copy. This
3867 presents a problem as a plt entry for that function is also
3868 initialized from the function descriptor symbol and the copy reloc
3869 may not be initialized first. */
3870 #define ELIMINATE_COPY_RELOCS 1
3871
3872 /* Section name for stubs is the associated section name plus this
3873 string. */
3874 #define STUB_SUFFIX ".stub"
3875
3876 /* Linker stubs.
3877 ppc_stub_long_branch:
3878 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3879 destination, but a 24 bit branch in a stub section will reach.
3880 . b dest
3881
3882 ppc_stub_plt_branch:
3883 Similar to the above, but a 24 bit branch in the stub section won't
3884 reach its destination.
3885 . addis %r11,%r2,xxx@toc@ha
3886 . ld %r12,xxx@toc@l(%r11)
3887 . mtctr %r12
3888 . bctr
3889
3890 ppc_stub_plt_call:
3891 Used to call a function in a shared library. If it so happens that
3892 the plt entry referenced crosses a 64k boundary, then an extra
3893 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx+0@toc@l(%r11)
3897 . mtctr %r12
3898 . ld %r2,xxx+8@toc@l(%r11)
3899 . ld %r11,xxx+16@toc@l(%r11)
3900 . bctr
3901
3902 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3903 code to adjust the value and save r2 to support multiple toc sections.
3904 A ppc_stub_long_branch with an r2 offset looks like:
3905 . std %r2,40(%r1)
3906 . addis %r2,%r2,off@ha
3907 . addi %r2,%r2,off@l
3908 . b dest
3909
3910 A ppc_stub_plt_branch with an r2 offset looks like:
3911 . std %r2,40(%r1)
3912 . addis %r11,%r2,xxx@toc@ha
3913 . ld %r12,xxx@toc@l(%r11)
3914 . addis %r2,%r2,off@ha
3915 . addi %r2,%r2,off@l
3916 . mtctr %r12
3917 . bctr
3918
3919 In cases where the "addis" instruction would add zero, the "addis" is
3920 omitted and following instructions modified slightly in some cases.
3921 */
3922
3923 enum ppc_stub_type {
3924 ppc_stub_none,
3925 ppc_stub_long_branch,
3926 ppc_stub_long_branch_r2off,
3927 ppc_stub_plt_branch,
3928 ppc_stub_plt_branch_r2off,
3929 ppc_stub_plt_call,
3930 ppc_stub_plt_call_r2save,
3931 ppc_stub_global_entry,
3932 ppc_stub_save_res
3933 };
3934
3935 /* Information on stub grouping. */
3936 struct map_stub
3937 {
3938 /* The stub section. */
3939 asection *stub_sec;
3940 /* This is the section to which stubs in the group will be attached. */
3941 asection *link_sec;
3942 /* Next group. */
3943 struct map_stub *next;
3944 /* Whether to emit a copy of register save/restore functions in this
3945 group. */
3946 int needs_save_res;
3947 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3948 or -1u if no such stub with bctrl exists. */
3949 unsigned int tls_get_addr_opt_bctrl;
3950 };
3951
3952 struct ppc_stub_hash_entry {
3953
3954 /* Base hash table entry structure. */
3955 struct bfd_hash_entry root;
3956
3957 enum ppc_stub_type stub_type;
3958
3959 /* Group information. */
3960 struct map_stub *group;
3961
3962 /* Offset within stub_sec of the beginning of this stub. */
3963 bfd_vma stub_offset;
3964
3965 /* Given the symbol's value and its section we can determine its final
3966 value when building the stubs (so the stub knows where to jump. */
3967 bfd_vma target_value;
3968 asection *target_section;
3969
3970 /* The symbol table entry, if any, that this was derived from. */
3971 struct ppc_link_hash_entry *h;
3972 struct plt_entry *plt_ent;
3973
3974 /* Symbol st_other. */
3975 unsigned char other;
3976 };
3977
3978 struct ppc_branch_hash_entry {
3979
3980 /* Base hash table entry structure. */
3981 struct bfd_hash_entry root;
3982
3983 /* Offset within branch lookup table. */
3984 unsigned int offset;
3985
3986 /* Generation marker. */
3987 unsigned int iter;
3988 };
3989
3990 /* Used to track dynamic relocations for local symbols. */
3991 struct ppc_dyn_relocs
3992 {
3993 struct ppc_dyn_relocs *next;
3994
3995 /* The input section of the reloc. */
3996 asection *sec;
3997
3998 /* Total number of relocs copied for the input section. */
3999 unsigned int count : 31;
4000
4001 /* Whether this entry is for STT_GNU_IFUNC symbols. */
4002 unsigned int ifunc : 1;
4003 };
4004
4005 struct ppc_link_hash_entry
4006 {
4007 struct elf_link_hash_entry elf;
4008
4009 union {
4010 /* A pointer to the most recently used stub hash entry against this
4011 symbol. */
4012 struct ppc_stub_hash_entry *stub_cache;
4013
4014 /* A pointer to the next symbol starting with a '.' */
4015 struct ppc_link_hash_entry *next_dot_sym;
4016 } u;
4017
4018 /* Track dynamic relocs copied for this symbol. */
4019 struct elf_dyn_relocs *dyn_relocs;
4020
4021 /* Link between function code and descriptor symbols. */
4022 struct ppc_link_hash_entry *oh;
4023
4024 /* Flag function code and descriptor symbols. */
4025 unsigned int is_func:1;
4026 unsigned int is_func_descriptor:1;
4027 unsigned int fake:1;
4028
4029 /* Whether global opd/toc sym has been adjusted or not.
4030 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4031 should be set for all globals defined in any opd/toc section. */
4032 unsigned int adjust_done:1;
4033
4034 /* Set if this is an out-of-line register save/restore function,
4035 with non-standard calling convention. */
4036 unsigned int save_res:1;
4037
4038 /* Set if a duplicate symbol with non-zero localentry is detected,
4039 even when the duplicate symbol does not provide a definition. */
4040 unsigned int non_zero_localentry:1;
4041
4042 /* Contexts in which symbol is used in the GOT (or TOC).
4043 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4044 corresponding relocs are encountered during check_relocs.
4045 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4046 indicate the corresponding GOT entry type is not needed.
4047 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4048 a TPREL one. We use a separate flag rather than setting TPREL
4049 just for convenience in distinguishing the two cases. */
4050 #define TLS_GD 1 /* GD reloc. */
4051 #define TLS_LD 2 /* LD reloc. */
4052 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4053 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4054 #define TLS_TLS 16 /* Any TLS reloc. */
4055 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4056 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4057 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4058 unsigned char tls_mask;
4059 };
4060
4061 /* ppc64 ELF linker hash table. */
4062
4063 struct ppc_link_hash_table
4064 {
4065 struct elf_link_hash_table elf;
4066
4067 /* The stub hash table. */
4068 struct bfd_hash_table stub_hash_table;
4069
4070 /* Another hash table for plt_branch stubs. */
4071 struct bfd_hash_table branch_hash_table;
4072
4073 /* Hash table for function prologue tocsave. */
4074 htab_t tocsave_htab;
4075
4076 /* Various options and other info passed from the linker. */
4077 struct ppc64_elf_params *params;
4078
4079 /* The size of sec_info below. */
4080 unsigned int sec_info_arr_size;
4081
4082 /* Per-section array of extra section info. Done this way rather
4083 than as part of ppc64_elf_section_data so we have the info for
4084 non-ppc64 sections. */
4085 struct
4086 {
4087 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4088 bfd_vma toc_off;
4089
4090 union
4091 {
4092 /* The section group that this section belongs to. */
4093 struct map_stub *group;
4094 /* A temp section list pointer. */
4095 asection *list;
4096 } u;
4097 } *sec_info;
4098
4099 /* Linked list of groups. */
4100 struct map_stub *group;
4101
4102 /* Temp used when calculating TOC pointers. */
4103 bfd_vma toc_curr;
4104 bfd *toc_bfd;
4105 asection *toc_first_sec;
4106
4107 /* Used when adding symbols. */
4108 struct ppc_link_hash_entry *dot_syms;
4109
4110 /* Shortcuts to get to dynamic linker sections. */
4111 asection *glink;
4112 asection *global_entry;
4113 asection *sfpr;
4114 asection *brlt;
4115 asection *relbrlt;
4116 asection *glink_eh_frame;
4117
4118 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4119 struct ppc_link_hash_entry *tls_get_addr;
4120 struct ppc_link_hash_entry *tls_get_addr_fd;
4121
4122 /* The size of reliplt used by got entry relocs. */
4123 bfd_size_type got_reli_size;
4124
4125 /* Statistics. */
4126 unsigned long stub_count[ppc_stub_global_entry];
4127
4128 /* Number of stubs against global syms. */
4129 unsigned long stub_globals;
4130
4131 /* Set if we're linking code with function descriptors. */
4132 unsigned int opd_abi:1;
4133
4134 /* Support for multiple toc sections. */
4135 unsigned int do_multi_toc:1;
4136 unsigned int multi_toc_needed:1;
4137 unsigned int second_toc_pass:1;
4138 unsigned int do_toc_opt:1;
4139
4140 /* Set if tls optimization is enabled. */
4141 unsigned int do_tls_opt:1;
4142
4143 /* Set on error. */
4144 unsigned int stub_error:1;
4145
4146 /* Whether func_desc_adjust needs to be run over symbols. */
4147 unsigned int need_func_desc_adj:1;
4148
4149 /* Whether there exist local gnu indirect function resolvers,
4150 referenced by dynamic relocations. */
4151 unsigned int local_ifunc_resolver:1;
4152 unsigned int maybe_local_ifunc_resolver:1;
4153
4154 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4155 unsigned int has_plt_localentry0:1;
4156
4157 /* Incremented every time we size stubs. */
4158 unsigned int stub_iteration;
4159
4160 /* Small local sym cache. */
4161 struct sym_cache sym_cache;
4162 };
4163
4164 /* Rename some of the generic section flags to better document how they
4165 are used here. */
4166
4167 /* Nonzero if this section has TLS related relocations. */
4168 #define has_tls_reloc sec_flg0
4169
4170 /* Nonzero if this section has a call to __tls_get_addr. */
4171 #define has_tls_get_addr_call sec_flg1
4172
4173 /* Nonzero if this section has any toc or got relocs. */
4174 #define has_toc_reloc sec_flg2
4175
4176 /* Nonzero if this section has a call to another section that uses
4177 the toc or got. */
4178 #define makes_toc_func_call sec_flg3
4179
4180 /* Recursion protection when determining above flag. */
4181 #define call_check_in_progress sec_flg4
4182 #define call_check_done sec_flg5
4183
4184 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4185
4186 #define ppc_hash_table(p) \
4187 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4188 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4189
4190 #define ppc_stub_hash_lookup(table, string, create, copy) \
4191 ((struct ppc_stub_hash_entry *) \
4192 bfd_hash_lookup ((table), (string), (create), (copy)))
4193
4194 #define ppc_branch_hash_lookup(table, string, create, copy) \
4195 ((struct ppc_branch_hash_entry *) \
4196 bfd_hash_lookup ((table), (string), (create), (copy)))
4197
4198 /* Create an entry in the stub hash table. */
4199
4200 static struct bfd_hash_entry *
4201 stub_hash_newfunc (struct bfd_hash_entry *entry,
4202 struct bfd_hash_table *table,
4203 const char *string)
4204 {
4205 /* Allocate the structure if it has not already been allocated by a
4206 subclass. */
4207 if (entry == NULL)
4208 {
4209 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4210 if (entry == NULL)
4211 return entry;
4212 }
4213
4214 /* Call the allocation method of the superclass. */
4215 entry = bfd_hash_newfunc (entry, table, string);
4216 if (entry != NULL)
4217 {
4218 struct ppc_stub_hash_entry *eh;
4219
4220 /* Initialize the local fields. */
4221 eh = (struct ppc_stub_hash_entry *) entry;
4222 eh->stub_type = ppc_stub_none;
4223 eh->group = NULL;
4224 eh->stub_offset = 0;
4225 eh->target_value = 0;
4226 eh->target_section = NULL;
4227 eh->h = NULL;
4228 eh->plt_ent = NULL;
4229 eh->other = 0;
4230 }
4231
4232 return entry;
4233 }
4234
4235 /* Create an entry in the branch hash table. */
4236
4237 static struct bfd_hash_entry *
4238 branch_hash_newfunc (struct bfd_hash_entry *entry,
4239 struct bfd_hash_table *table,
4240 const char *string)
4241 {
4242 /* Allocate the structure if it has not already been allocated by a
4243 subclass. */
4244 if (entry == NULL)
4245 {
4246 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4247 if (entry == NULL)
4248 return entry;
4249 }
4250
4251 /* Call the allocation method of the superclass. */
4252 entry = bfd_hash_newfunc (entry, table, string);
4253 if (entry != NULL)
4254 {
4255 struct ppc_branch_hash_entry *eh;
4256
4257 /* Initialize the local fields. */
4258 eh = (struct ppc_branch_hash_entry *) entry;
4259 eh->offset = 0;
4260 eh->iter = 0;
4261 }
4262
4263 return entry;
4264 }
4265
4266 /* Create an entry in a ppc64 ELF linker hash table. */
4267
4268 static struct bfd_hash_entry *
4269 link_hash_newfunc (struct bfd_hash_entry *entry,
4270 struct bfd_hash_table *table,
4271 const char *string)
4272 {
4273 /* Allocate the structure if it has not already been allocated by a
4274 subclass. */
4275 if (entry == NULL)
4276 {
4277 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4278 if (entry == NULL)
4279 return entry;
4280 }
4281
4282 /* Call the allocation method of the superclass. */
4283 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4284 if (entry != NULL)
4285 {
4286 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4287
4288 memset (&eh->u.stub_cache, 0,
4289 (sizeof (struct ppc_link_hash_entry)
4290 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4291
4292 /* When making function calls, old ABI code references function entry
4293 points (dot symbols), while new ABI code references the function
4294 descriptor symbol. We need to make any combination of reference and
4295 definition work together, without breaking archive linking.
4296
4297 For a defined function "foo" and an undefined call to "bar":
4298 An old object defines "foo" and ".foo", references ".bar" (possibly
4299 "bar" too).
4300 A new object defines "foo" and references "bar".
4301
4302 A new object thus has no problem with its undefined symbols being
4303 satisfied by definitions in an old object. On the other hand, the
4304 old object won't have ".bar" satisfied by a new object.
4305
4306 Keep a list of newly added dot-symbols. */
4307
4308 if (string[0] == '.')
4309 {
4310 struct ppc_link_hash_table *htab;
4311
4312 htab = (struct ppc_link_hash_table *) table;
4313 eh->u.next_dot_sym = htab->dot_syms;
4314 htab->dot_syms = eh;
4315 }
4316 }
4317
4318 return entry;
4319 }
4320
4321 struct tocsave_entry {
4322 asection *sec;
4323 bfd_vma offset;
4324 };
4325
4326 static hashval_t
4327 tocsave_htab_hash (const void *p)
4328 {
4329 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4330 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4331 }
4332
4333 static int
4334 tocsave_htab_eq (const void *p1, const void *p2)
4335 {
4336 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4337 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4338 return e1->sec == e2->sec && e1->offset == e2->offset;
4339 }
4340
4341 /* Destroy a ppc64 ELF linker hash table. */
4342
4343 static void
4344 ppc64_elf_link_hash_table_free (bfd *obfd)
4345 {
4346 struct ppc_link_hash_table *htab;
4347
4348 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4349 if (htab->tocsave_htab)
4350 htab_delete (htab->tocsave_htab);
4351 bfd_hash_table_free (&htab->branch_hash_table);
4352 bfd_hash_table_free (&htab->stub_hash_table);
4353 _bfd_elf_link_hash_table_free (obfd);
4354 }
4355
4356 /* Create a ppc64 ELF linker hash table. */
4357
4358 static struct bfd_link_hash_table *
4359 ppc64_elf_link_hash_table_create (bfd *abfd)
4360 {
4361 struct ppc_link_hash_table *htab;
4362 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4363
4364 htab = bfd_zmalloc (amt);
4365 if (htab == NULL)
4366 return NULL;
4367
4368 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4369 sizeof (struct ppc_link_hash_entry),
4370 PPC64_ELF_DATA))
4371 {
4372 free (htab);
4373 return NULL;
4374 }
4375
4376 /* Init the stub hash table too. */
4377 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4378 sizeof (struct ppc_stub_hash_entry)))
4379 {
4380 _bfd_elf_link_hash_table_free (abfd);
4381 return NULL;
4382 }
4383
4384 /* And the branch hash table. */
4385 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4386 sizeof (struct ppc_branch_hash_entry)))
4387 {
4388 bfd_hash_table_free (&htab->stub_hash_table);
4389 _bfd_elf_link_hash_table_free (abfd);
4390 return NULL;
4391 }
4392
4393 htab->tocsave_htab = htab_try_create (1024,
4394 tocsave_htab_hash,
4395 tocsave_htab_eq,
4396 NULL);
4397 if (htab->tocsave_htab == NULL)
4398 {
4399 ppc64_elf_link_hash_table_free (abfd);
4400 return NULL;
4401 }
4402 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4403
4404 /* Initializing two fields of the union is just cosmetic. We really
4405 only care about glist, but when compiled on a 32-bit host the
4406 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4407 debugger inspection of these fields look nicer. */
4408 htab->elf.init_got_refcount.refcount = 0;
4409 htab->elf.init_got_refcount.glist = NULL;
4410 htab->elf.init_plt_refcount.refcount = 0;
4411 htab->elf.init_plt_refcount.glist = NULL;
4412 htab->elf.init_got_offset.offset = 0;
4413 htab->elf.init_got_offset.glist = NULL;
4414 htab->elf.init_plt_offset.offset = 0;
4415 htab->elf.init_plt_offset.glist = NULL;
4416
4417 return &htab->elf.root;
4418 }
4419
4420 /* Create sections for linker generated code. */
4421
4422 static bfd_boolean
4423 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4424 {
4425 struct ppc_link_hash_table *htab;
4426 flagword flags;
4427
4428 htab = ppc_hash_table (info);
4429
4430 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4431 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4432 if (htab->params->save_restore_funcs)
4433 {
4434 /* Create .sfpr for code to save and restore fp regs. */
4435 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4436 flags);
4437 if (htab->sfpr == NULL
4438 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4439 return FALSE;
4440 }
4441
4442 if (bfd_link_relocatable (info))
4443 return TRUE;
4444
4445 /* Create .glink for lazy dynamic linking support. */
4446 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4447 flags);
4448 if (htab->glink == NULL
4449 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4450 return FALSE;
4451
4452 /* The part of .glink used by global entry stubs, separate so that
4453 it can be aligned appropriately without affecting htab->glink. */
4454 htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4455 flags);
4456 if (htab->global_entry == NULL
4457 || ! bfd_set_section_alignment (dynobj, htab->global_entry, 2))
4458 return FALSE;
4459
4460 if (!info->no_ld_generated_unwind_info)
4461 {
4462 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4463 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4464 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4465 ".eh_frame",
4466 flags);
4467 if (htab->glink_eh_frame == NULL
4468 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4469 return FALSE;
4470 }
4471
4472 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4473 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4474 if (htab->elf.iplt == NULL
4475 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4476 return FALSE;
4477
4478 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4479 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4480 htab->elf.irelplt
4481 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4482 if (htab->elf.irelplt == NULL
4483 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4484 return FALSE;
4485
4486 /* Create branch lookup table for plt_branch stubs. */
4487 flags = (SEC_ALLOC | SEC_LOAD
4488 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4489 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4490 flags);
4491 if (htab->brlt == NULL
4492 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4493 return FALSE;
4494
4495 if (!bfd_link_pic (info))
4496 return TRUE;
4497
4498 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4499 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4500 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4501 ".rela.branch_lt",
4502 flags);
4503 if (htab->relbrlt == NULL
4504 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4505 return FALSE;
4506
4507 return TRUE;
4508 }
4509
4510 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4511
4512 bfd_boolean
4513 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4514 struct ppc64_elf_params *params)
4515 {
4516 struct ppc_link_hash_table *htab;
4517
4518 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4519
4520 /* Always hook our dynamic sections into the first bfd, which is the
4521 linker created stub bfd. This ensures that the GOT header is at
4522 the start of the output TOC section. */
4523 htab = ppc_hash_table (info);
4524 htab->elf.dynobj = params->stub_bfd;
4525 htab->params = params;
4526
4527 return create_linkage_sections (htab->elf.dynobj, info);
4528 }
4529
4530 /* Build a name for an entry in the stub hash table. */
4531
4532 static char *
4533 ppc_stub_name (const asection *input_section,
4534 const asection *sym_sec,
4535 const struct ppc_link_hash_entry *h,
4536 const Elf_Internal_Rela *rel)
4537 {
4538 char *stub_name;
4539 ssize_t len;
4540
4541 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4542 offsets from a sym as a branch target? In fact, we could
4543 probably assume the addend is always zero. */
4544 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4545
4546 if (h)
4547 {
4548 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4549 stub_name = bfd_malloc (len);
4550 if (stub_name == NULL)
4551 return stub_name;
4552
4553 len = sprintf (stub_name, "%08x.%s+%x",
4554 input_section->id & 0xffffffff,
4555 h->elf.root.root.string,
4556 (int) rel->r_addend & 0xffffffff);
4557 }
4558 else
4559 {
4560 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4561 stub_name = bfd_malloc (len);
4562 if (stub_name == NULL)
4563 return stub_name;
4564
4565 len = sprintf (stub_name, "%08x.%x:%x+%x",
4566 input_section->id & 0xffffffff,
4567 sym_sec->id & 0xffffffff,
4568 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4569 (int) rel->r_addend & 0xffffffff);
4570 }
4571 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4572 stub_name[len - 2] = 0;
4573 return stub_name;
4574 }
4575
4576 /* Look up an entry in the stub hash. Stub entries are cached because
4577 creating the stub name takes a bit of time. */
4578
4579 static struct ppc_stub_hash_entry *
4580 ppc_get_stub_entry (const asection *input_section,
4581 const asection *sym_sec,
4582 struct ppc_link_hash_entry *h,
4583 const Elf_Internal_Rela *rel,
4584 struct ppc_link_hash_table *htab)
4585 {
4586 struct ppc_stub_hash_entry *stub_entry;
4587 struct map_stub *group;
4588
4589 /* If this input section is part of a group of sections sharing one
4590 stub section, then use the id of the first section in the group.
4591 Stub names need to include a section id, as there may well be
4592 more than one stub used to reach say, printf, and we need to
4593 distinguish between them. */
4594 group = htab->sec_info[input_section->id].u.group;
4595 if (group == NULL)
4596 return NULL;
4597
4598 if (h != NULL && h->u.stub_cache != NULL
4599 && h->u.stub_cache->h == h
4600 && h->u.stub_cache->group == group)
4601 {
4602 stub_entry = h->u.stub_cache;
4603 }
4604 else
4605 {
4606 char *stub_name;
4607
4608 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4609 if (stub_name == NULL)
4610 return NULL;
4611
4612 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4613 stub_name, FALSE, FALSE);
4614 if (h != NULL)
4615 h->u.stub_cache = stub_entry;
4616
4617 free (stub_name);
4618 }
4619
4620 return stub_entry;
4621 }
4622
4623 /* Add a new stub entry to the stub hash. Not all fields of the new
4624 stub entry are initialised. */
4625
4626 static struct ppc_stub_hash_entry *
4627 ppc_add_stub (const char *stub_name,
4628 asection *section,
4629 struct bfd_link_info *info)
4630 {
4631 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4632 struct map_stub *group;
4633 asection *link_sec;
4634 asection *stub_sec;
4635 struct ppc_stub_hash_entry *stub_entry;
4636
4637 group = htab->sec_info[section->id].u.group;
4638 link_sec = group->link_sec;
4639 stub_sec = group->stub_sec;
4640 if (stub_sec == NULL)
4641 {
4642 size_t namelen;
4643 bfd_size_type len;
4644 char *s_name;
4645
4646 namelen = strlen (link_sec->name);
4647 len = namelen + sizeof (STUB_SUFFIX);
4648 s_name = bfd_alloc (htab->params->stub_bfd, len);
4649 if (s_name == NULL)
4650 return NULL;
4651
4652 memcpy (s_name, link_sec->name, namelen);
4653 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4654 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4655 if (stub_sec == NULL)
4656 return NULL;
4657 group->stub_sec = stub_sec;
4658 }
4659
4660 /* Enter this entry into the linker stub hash table. */
4661 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4662 TRUE, FALSE);
4663 if (stub_entry == NULL)
4664 {
4665 /* xgettext:c-format */
4666 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4667 section->owner, stub_name);
4668 return NULL;
4669 }
4670
4671 stub_entry->group = group;
4672 stub_entry->stub_offset = 0;
4673 return stub_entry;
4674 }
4675
4676 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4677 not already done. */
4678
4679 static bfd_boolean
4680 create_got_section (bfd *abfd, struct bfd_link_info *info)
4681 {
4682 asection *got, *relgot;
4683 flagword flags;
4684 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4685
4686 if (!is_ppc64_elf (abfd))
4687 return FALSE;
4688 if (htab == NULL)
4689 return FALSE;
4690
4691 if (!htab->elf.sgot
4692 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4693 return FALSE;
4694
4695 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4696 | SEC_LINKER_CREATED);
4697
4698 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4699 if (!got
4700 || !bfd_set_section_alignment (abfd, got, 3))
4701 return FALSE;
4702
4703 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4704 flags | SEC_READONLY);
4705 if (!relgot
4706 || ! bfd_set_section_alignment (abfd, relgot, 3))
4707 return FALSE;
4708
4709 ppc64_elf_tdata (abfd)->got = got;
4710 ppc64_elf_tdata (abfd)->relgot = relgot;
4711 return TRUE;
4712 }
4713
4714 /* Follow indirect and warning symbol links. */
4715
4716 static inline struct bfd_link_hash_entry *
4717 follow_link (struct bfd_link_hash_entry *h)
4718 {
4719 while (h->type == bfd_link_hash_indirect
4720 || h->type == bfd_link_hash_warning)
4721 h = h->u.i.link;
4722 return h;
4723 }
4724
4725 static inline struct elf_link_hash_entry *
4726 elf_follow_link (struct elf_link_hash_entry *h)
4727 {
4728 return (struct elf_link_hash_entry *) follow_link (&h->root);
4729 }
4730
4731 static inline struct ppc_link_hash_entry *
4732 ppc_follow_link (struct ppc_link_hash_entry *h)
4733 {
4734 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4735 }
4736
4737 /* Merge PLT info on FROM with that on TO. */
4738
4739 static void
4740 move_plt_plist (struct ppc_link_hash_entry *from,
4741 struct ppc_link_hash_entry *to)
4742 {
4743 if (from->elf.plt.plist != NULL)
4744 {
4745 if (to->elf.plt.plist != NULL)
4746 {
4747 struct plt_entry **entp;
4748 struct plt_entry *ent;
4749
4750 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4751 {
4752 struct plt_entry *dent;
4753
4754 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4755 if (dent->addend == ent->addend)
4756 {
4757 dent->plt.refcount += ent->plt.refcount;
4758 *entp = ent->next;
4759 break;
4760 }
4761 if (dent == NULL)
4762 entp = &ent->next;
4763 }
4764 *entp = to->elf.plt.plist;
4765 }
4766
4767 to->elf.plt.plist = from->elf.plt.plist;
4768 from->elf.plt.plist = NULL;
4769 }
4770 }
4771
4772 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4773
4774 static void
4775 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4776 struct elf_link_hash_entry *dir,
4777 struct elf_link_hash_entry *ind)
4778 {
4779 struct ppc_link_hash_entry *edir, *eind;
4780
4781 edir = (struct ppc_link_hash_entry *) dir;
4782 eind = (struct ppc_link_hash_entry *) ind;
4783
4784 edir->is_func |= eind->is_func;
4785 edir->is_func_descriptor |= eind->is_func_descriptor;
4786 edir->tls_mask |= eind->tls_mask;
4787 if (eind->oh != NULL)
4788 edir->oh = ppc_follow_link (eind->oh);
4789
4790 if (edir->elf.versioned != versioned_hidden)
4791 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4792 edir->elf.ref_regular |= eind->elf.ref_regular;
4793 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4794 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4795 edir->elf.needs_plt |= eind->elf.needs_plt;
4796 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4797
4798 /* If we were called to copy over info for a weak sym, don't copy
4799 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4800 in order to simplify readonly_dynrelocs and save a field in the
4801 symbol hash entry, but that means dyn_relocs can't be used in any
4802 tests about a specific symbol, or affect other symbol flags which
4803 are then tested. */
4804 if (eind->elf.root.type != bfd_link_hash_indirect)
4805 return;
4806
4807 /* Copy over any dynamic relocs we may have on the indirect sym. */
4808 if (eind->dyn_relocs != NULL)
4809 {
4810 if (edir->dyn_relocs != NULL)
4811 {
4812 struct elf_dyn_relocs **pp;
4813 struct elf_dyn_relocs *p;
4814
4815 /* Add reloc counts against the indirect sym to the direct sym
4816 list. Merge any entries against the same section. */
4817 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4818 {
4819 struct elf_dyn_relocs *q;
4820
4821 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4822 if (q->sec == p->sec)
4823 {
4824 q->pc_count += p->pc_count;
4825 q->count += p->count;
4826 *pp = p->next;
4827 break;
4828 }
4829 if (q == NULL)
4830 pp = &p->next;
4831 }
4832 *pp = edir->dyn_relocs;
4833 }
4834
4835 edir->dyn_relocs = eind->dyn_relocs;
4836 eind->dyn_relocs = NULL;
4837 }
4838
4839 /* Copy over got entries that we may have already seen to the
4840 symbol which just became indirect. */
4841 if (eind->elf.got.glist != NULL)
4842 {
4843 if (edir->elf.got.glist != NULL)
4844 {
4845 struct got_entry **entp;
4846 struct got_entry *ent;
4847
4848 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4849 {
4850 struct got_entry *dent;
4851
4852 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4853 if (dent->addend == ent->addend
4854 && dent->owner == ent->owner
4855 && dent->tls_type == ent->tls_type)
4856 {
4857 dent->got.refcount += ent->got.refcount;
4858 *entp = ent->next;
4859 break;
4860 }
4861 if (dent == NULL)
4862 entp = &ent->next;
4863 }
4864 *entp = edir->elf.got.glist;
4865 }
4866
4867 edir->elf.got.glist = eind->elf.got.glist;
4868 eind->elf.got.glist = NULL;
4869 }
4870
4871 /* And plt entries. */
4872 move_plt_plist (eind, edir);
4873
4874 if (eind->elf.dynindx != -1)
4875 {
4876 if (edir->elf.dynindx != -1)
4877 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4878 edir->elf.dynstr_index);
4879 edir->elf.dynindx = eind->elf.dynindx;
4880 edir->elf.dynstr_index = eind->elf.dynstr_index;
4881 eind->elf.dynindx = -1;
4882 eind->elf.dynstr_index = 0;
4883 }
4884 }
4885
4886 /* Find the function descriptor hash entry from the given function code
4887 hash entry FH. Link the entries via their OH fields. */
4888
4889 static struct ppc_link_hash_entry *
4890 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4891 {
4892 struct ppc_link_hash_entry *fdh = fh->oh;
4893
4894 if (fdh == NULL)
4895 {
4896 const char *fd_name = fh->elf.root.root.string + 1;
4897
4898 fdh = (struct ppc_link_hash_entry *)
4899 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4900 if (fdh == NULL)
4901 return fdh;
4902
4903 fdh->is_func_descriptor = 1;
4904 fdh->oh = fh;
4905 fh->is_func = 1;
4906 fh->oh = fdh;
4907 }
4908
4909 fdh = ppc_follow_link (fdh);
4910 fdh->is_func_descriptor = 1;
4911 fdh->oh = fh;
4912 return fdh;
4913 }
4914
4915 /* Make a fake function descriptor sym for the undefined code sym FH. */
4916
4917 static struct ppc_link_hash_entry *
4918 make_fdh (struct bfd_link_info *info,
4919 struct ppc_link_hash_entry *fh)
4920 {
4921 bfd *abfd = fh->elf.root.u.undef.abfd;
4922 struct bfd_link_hash_entry *bh = NULL;
4923 struct ppc_link_hash_entry *fdh;
4924 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4925 ? BSF_WEAK
4926 : BSF_GLOBAL);
4927
4928 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4929 fh->elf.root.root.string + 1,
4930 flags, bfd_und_section_ptr, 0,
4931 NULL, FALSE, FALSE, &bh))
4932 return NULL;
4933
4934 fdh = (struct ppc_link_hash_entry *) bh;
4935 fdh->elf.non_elf = 0;
4936 fdh->fake = 1;
4937 fdh->is_func_descriptor = 1;
4938 fdh->oh = fh;
4939 fh->is_func = 1;
4940 fh->oh = fdh;
4941 return fdh;
4942 }
4943
4944 /* Fix function descriptor symbols defined in .opd sections to be
4945 function type. */
4946
4947 static bfd_boolean
4948 ppc64_elf_add_symbol_hook (bfd *ibfd,
4949 struct bfd_link_info *info,
4950 Elf_Internal_Sym *isym,
4951 const char **name,
4952 flagword *flags ATTRIBUTE_UNUSED,
4953 asection **sec,
4954 bfd_vma *value)
4955 {
4956 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4957 && (ibfd->flags & DYNAMIC) == 0
4958 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4959 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4960
4961 if (*sec != NULL
4962 && strcmp ((*sec)->name, ".opd") == 0)
4963 {
4964 asection *code_sec;
4965
4966 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4967 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4968 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4969
4970 /* If the symbol is a function defined in .opd, and the function
4971 code is in a discarded group, let it appear to be undefined. */
4972 if (!bfd_link_relocatable (info)
4973 && (*sec)->reloc_count != 0
4974 && opd_entry_value (*sec, *value, &code_sec, NULL,
4975 FALSE) != (bfd_vma) -1
4976 && discarded_section (code_sec))
4977 {
4978 *sec = bfd_und_section_ptr;
4979 isym->st_shndx = SHN_UNDEF;
4980 }
4981 }
4982 else if (*sec != NULL
4983 && strcmp ((*sec)->name, ".toc") == 0
4984 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4985 {
4986 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4987 if (htab != NULL)
4988 htab->params->object_in_toc = 1;
4989 }
4990
4991 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4992 {
4993 if (abiversion (ibfd) == 0)
4994 set_abiversion (ibfd, 2);
4995 else if (abiversion (ibfd) == 1)
4996 {
4997 _bfd_error_handler (_("symbol '%s' has invalid st_other"
4998 " for ABI version 1"), *name);
4999 bfd_set_error (bfd_error_bad_value);
5000 return FALSE;
5001 }
5002 }
5003
5004 return TRUE;
5005 }
5006
5007 /* Merge non-visibility st_other attributes: local entry point. */
5008
5009 static void
5010 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5011 const Elf_Internal_Sym *isym,
5012 bfd_boolean definition,
5013 bfd_boolean dynamic)
5014 {
5015 if (definition && (!dynamic || !h->def_regular))
5016 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5017 | ELF_ST_VISIBILITY (h->other));
5018 }
5019
5020 /* Hook called on merging a symbol. We use this to clear "fake" since
5021 we now have a real symbol. */
5022
5023 static bfd_boolean
5024 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5025 const Elf_Internal_Sym *isym,
5026 asection **psec ATTRIBUTE_UNUSED,
5027 bfd_boolean newdef ATTRIBUTE_UNUSED,
5028 bfd_boolean olddef ATTRIBUTE_UNUSED,
5029 bfd *oldbfd ATTRIBUTE_UNUSED,
5030 const asection *oldsec ATTRIBUTE_UNUSED)
5031 {
5032 ((struct ppc_link_hash_entry *) h)->fake = 0;
5033 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5034 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5035 return TRUE;
5036 }
5037
5038 /* This function makes an old ABI object reference to ".bar" cause the
5039 inclusion of a new ABI object archive that defines "bar".
5040 NAME is a symbol defined in an archive. Return a symbol in the hash
5041 table that might be satisfied by the archive symbols. */
5042
5043 static struct elf_link_hash_entry *
5044 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5045 struct bfd_link_info *info,
5046 const char *name)
5047 {
5048 struct elf_link_hash_entry *h;
5049 char *dot_name;
5050 size_t len;
5051
5052 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5053 if (h != NULL
5054 /* Don't return this sym if it is a fake function descriptor
5055 created by add_symbol_adjust. */
5056 && !((struct ppc_link_hash_entry *) h)->fake)
5057 return h;
5058
5059 if (name[0] == '.')
5060 return h;
5061
5062 len = strlen (name);
5063 dot_name = bfd_alloc (abfd, len + 2);
5064 if (dot_name == NULL)
5065 return (struct elf_link_hash_entry *) -1;
5066 dot_name[0] = '.';
5067 memcpy (dot_name + 1, name, len + 1);
5068 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5069 bfd_release (abfd, dot_name);
5070 return h;
5071 }
5072
5073 /* This function satisfies all old ABI object references to ".bar" if a
5074 new ABI object defines "bar". Well, at least, undefined dot symbols
5075 are made weak. This stops later archive searches from including an
5076 object if we already have a function descriptor definition. It also
5077 prevents the linker complaining about undefined symbols.
5078 We also check and correct mismatched symbol visibility here. The
5079 most restrictive visibility of the function descriptor and the
5080 function entry symbol is used. */
5081
5082 static bfd_boolean
5083 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5084 {
5085 struct ppc_link_hash_table *htab;
5086 struct ppc_link_hash_entry *fdh;
5087
5088 if (eh->elf.root.type == bfd_link_hash_warning)
5089 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5090
5091 if (eh->elf.root.type == bfd_link_hash_indirect)
5092 return TRUE;
5093
5094 if (eh->elf.root.root.string[0] != '.')
5095 abort ();
5096
5097 htab = ppc_hash_table (info);
5098 if (htab == NULL)
5099 return FALSE;
5100
5101 fdh = lookup_fdh (eh, htab);
5102 if (fdh == NULL
5103 && !bfd_link_relocatable (info)
5104 && (eh->elf.root.type == bfd_link_hash_undefined
5105 || eh->elf.root.type == bfd_link_hash_undefweak)
5106 && eh->elf.ref_regular)
5107 {
5108 /* Make an undefined function descriptor sym, in order to
5109 pull in an --as-needed shared lib. Archives are handled
5110 elsewhere. */
5111 fdh = make_fdh (info, eh);
5112 if (fdh == NULL)
5113 return FALSE;
5114 }
5115
5116 if (fdh != NULL)
5117 {
5118 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5119 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5120
5121 /* Make both descriptor and entry symbol have the most
5122 constraining visibility of either symbol. */
5123 if (entry_vis < descr_vis)
5124 fdh->elf.other += entry_vis - descr_vis;
5125 else if (entry_vis > descr_vis)
5126 eh->elf.other += descr_vis - entry_vis;
5127
5128 /* Propagate reference flags from entry symbol to function
5129 descriptor symbol. */
5130 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5131 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5132 fdh->elf.ref_regular |= eh->elf.ref_regular;
5133 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5134
5135 if (!fdh->elf.forced_local
5136 && fdh->elf.dynindx == -1
5137 && fdh->elf.versioned != versioned_hidden
5138 && (bfd_link_dll (info)
5139 || fdh->elf.def_dynamic
5140 || fdh->elf.ref_dynamic)
5141 && (eh->elf.ref_regular
5142 || eh->elf.def_regular))
5143 {
5144 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5145 return FALSE;
5146 }
5147 }
5148
5149 return TRUE;
5150 }
5151
5152 /* Set up opd section info and abiversion for IBFD, and process list
5153 of dot-symbols we made in link_hash_newfunc. */
5154
5155 static bfd_boolean
5156 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5157 {
5158 struct ppc_link_hash_table *htab;
5159 struct ppc_link_hash_entry **p, *eh;
5160 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5161
5162 if (opd != NULL && opd->size != 0)
5163 {
5164 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5165 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5166
5167 if (abiversion (ibfd) == 0)
5168 set_abiversion (ibfd, 1);
5169 else if (abiversion (ibfd) >= 2)
5170 {
5171 /* xgettext:c-format */
5172 _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"),
5173 ibfd, abiversion (ibfd));
5174 bfd_set_error (bfd_error_bad_value);
5175 return FALSE;
5176 }
5177 }
5178
5179 if (is_ppc64_elf (info->output_bfd))
5180 {
5181 /* For input files without an explicit abiversion in e_flags
5182 we should have flagged any with symbol st_other bits set
5183 as ELFv1 and above flagged those with .opd as ELFv2.
5184 Set the output abiversion if not yet set, and for any input
5185 still ambiguous, take its abiversion from the output.
5186 Differences in ABI are reported later. */
5187 if (abiversion (info->output_bfd) == 0)
5188 set_abiversion (info->output_bfd, abiversion (ibfd));
5189 else if (abiversion (ibfd) == 0)
5190 set_abiversion (ibfd, abiversion (info->output_bfd));
5191 }
5192
5193 htab = ppc_hash_table (info);
5194 if (htab == NULL)
5195 return TRUE;
5196
5197 if (opd != NULL && opd->size != 0
5198 && (ibfd->flags & DYNAMIC) == 0
5199 && (opd->flags & SEC_RELOC) != 0
5200 && opd->reloc_count != 0
5201 && !bfd_is_abs_section (opd->output_section)
5202 && info->gc_sections)
5203 {
5204 /* Garbage collection needs some extra help with .opd sections.
5205 We don't want to necessarily keep everything referenced by
5206 relocs in .opd, as that would keep all functions. Instead,
5207 if we reference an .opd symbol (a function descriptor), we
5208 want to keep the function code symbol's section. This is
5209 easy for global symbols, but for local syms we need to keep
5210 information about the associated function section. */
5211 bfd_size_type amt;
5212 asection **opd_sym_map;
5213 Elf_Internal_Shdr *symtab_hdr;
5214 Elf_Internal_Rela *relocs, *rel_end, *rel;
5215
5216 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5217 opd_sym_map = bfd_zalloc (ibfd, amt);
5218 if (opd_sym_map == NULL)
5219 return FALSE;
5220 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5221 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5222 info->keep_memory);
5223 if (relocs == NULL)
5224 return FALSE;
5225 symtab_hdr = &elf_symtab_hdr (ibfd);
5226 rel_end = relocs + opd->reloc_count - 1;
5227 for (rel = relocs; rel < rel_end; rel++)
5228 {
5229 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5230 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5231
5232 if (r_type == R_PPC64_ADDR64
5233 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5234 && r_symndx < symtab_hdr->sh_info)
5235 {
5236 Elf_Internal_Sym *isym;
5237 asection *s;
5238
5239 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5240 if (isym == NULL)
5241 {
5242 if (elf_section_data (opd)->relocs != relocs)
5243 free (relocs);
5244 return FALSE;
5245 }
5246
5247 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5248 if (s != NULL && s != opd)
5249 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5250 }
5251 }
5252 if (elf_section_data (opd)->relocs != relocs)
5253 free (relocs);
5254 }
5255
5256 p = &htab->dot_syms;
5257 while ((eh = *p) != NULL)
5258 {
5259 *p = NULL;
5260 if (&eh->elf == htab->elf.hgot)
5261 ;
5262 else if (htab->elf.hgot == NULL
5263 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5264 htab->elf.hgot = &eh->elf;
5265 else if (abiversion (ibfd) <= 1)
5266 {
5267 htab->need_func_desc_adj = 1;
5268 if (!add_symbol_adjust (eh, info))
5269 return FALSE;
5270 }
5271 p = &eh->u.next_dot_sym;
5272 }
5273 return TRUE;
5274 }
5275
5276 /* Undo hash table changes when an --as-needed input file is determined
5277 not to be needed. */
5278
5279 static bfd_boolean
5280 ppc64_elf_notice_as_needed (bfd *ibfd,
5281 struct bfd_link_info *info,
5282 enum notice_asneeded_action act)
5283 {
5284 if (act == notice_not_needed)
5285 {
5286 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5287
5288 if (htab == NULL)
5289 return FALSE;
5290
5291 htab->dot_syms = NULL;
5292 }
5293 return _bfd_elf_notice_as_needed (ibfd, info, act);
5294 }
5295
5296 /* If --just-symbols against a final linked binary, then assume we need
5297 toc adjusting stubs when calling functions defined there. */
5298
5299 static void
5300 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5301 {
5302 if ((sec->flags & SEC_CODE) != 0
5303 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5304 && is_ppc64_elf (sec->owner))
5305 {
5306 if (abiversion (sec->owner) >= 2
5307 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5308 sec->has_toc_reloc = 1;
5309 }
5310 _bfd_elf_link_just_syms (sec, info);
5311 }
5312
5313 static struct plt_entry **
5314 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5315 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5316 {
5317 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5318 struct plt_entry **local_plt;
5319 unsigned char *local_got_tls_masks;
5320
5321 if (local_got_ents == NULL)
5322 {
5323 bfd_size_type size = symtab_hdr->sh_info;
5324
5325 size *= (sizeof (*local_got_ents)
5326 + sizeof (*local_plt)
5327 + sizeof (*local_got_tls_masks));
5328 local_got_ents = bfd_zalloc (abfd, size);
5329 if (local_got_ents == NULL)
5330 return NULL;
5331 elf_local_got_ents (abfd) = local_got_ents;
5332 }
5333
5334 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5335 {
5336 struct got_entry *ent;
5337
5338 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5339 if (ent->addend == r_addend
5340 && ent->owner == abfd
5341 && ent->tls_type == tls_type)
5342 break;
5343 if (ent == NULL)
5344 {
5345 bfd_size_type amt = sizeof (*ent);
5346 ent = bfd_alloc (abfd, amt);
5347 if (ent == NULL)
5348 return FALSE;
5349 ent->next = local_got_ents[r_symndx];
5350 ent->addend = r_addend;
5351 ent->owner = abfd;
5352 ent->tls_type = tls_type;
5353 ent->is_indirect = FALSE;
5354 ent->got.refcount = 0;
5355 local_got_ents[r_symndx] = ent;
5356 }
5357 ent->got.refcount += 1;
5358 }
5359
5360 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5361 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5362 local_got_tls_masks[r_symndx] |= tls_type;
5363
5364 return local_plt + r_symndx;
5365 }
5366
5367 static bfd_boolean
5368 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5369 {
5370 struct plt_entry *ent;
5371
5372 for (ent = *plist; ent != NULL; ent = ent->next)
5373 if (ent->addend == addend)
5374 break;
5375 if (ent == NULL)
5376 {
5377 bfd_size_type amt = sizeof (*ent);
5378 ent = bfd_alloc (abfd, amt);
5379 if (ent == NULL)
5380 return FALSE;
5381 ent->next = *plist;
5382 ent->addend = addend;
5383 ent->plt.refcount = 0;
5384 *plist = ent;
5385 }
5386 ent->plt.refcount += 1;
5387 return TRUE;
5388 }
5389
5390 static bfd_boolean
5391 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5392 {
5393 return (r_type == R_PPC64_REL24
5394 || r_type == R_PPC64_REL14
5395 || r_type == R_PPC64_REL14_BRTAKEN
5396 || r_type == R_PPC64_REL14_BRNTAKEN
5397 || r_type == R_PPC64_ADDR24
5398 || r_type == R_PPC64_ADDR14
5399 || r_type == R_PPC64_ADDR14_BRTAKEN
5400 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5401 }
5402
5403 /* Look through the relocs for a section during the first phase, and
5404 calculate needed space in the global offset table, procedure
5405 linkage table, and dynamic reloc sections. */
5406
5407 static bfd_boolean
5408 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5409 asection *sec, const Elf_Internal_Rela *relocs)
5410 {
5411 struct ppc_link_hash_table *htab;
5412 Elf_Internal_Shdr *symtab_hdr;
5413 struct elf_link_hash_entry **sym_hashes;
5414 const Elf_Internal_Rela *rel;
5415 const Elf_Internal_Rela *rel_end;
5416 asection *sreloc;
5417 struct elf_link_hash_entry *tga, *dottga;
5418 bfd_boolean is_opd;
5419
5420 if (bfd_link_relocatable (info))
5421 return TRUE;
5422
5423 /* Don't do anything special with non-loaded, non-alloced sections.
5424 In particular, any relocs in such sections should not affect GOT
5425 and PLT reference counting (ie. we don't allow them to create GOT
5426 or PLT entries), there's no possibility or desire to optimize TLS
5427 relocs, and there's not much point in propagating relocs to shared
5428 libs that the dynamic linker won't relocate. */
5429 if ((sec->flags & SEC_ALLOC) == 0)
5430 return TRUE;
5431
5432 BFD_ASSERT (is_ppc64_elf (abfd));
5433
5434 htab = ppc_hash_table (info);
5435 if (htab == NULL)
5436 return FALSE;
5437
5438 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5439 FALSE, FALSE, TRUE);
5440 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5441 FALSE, FALSE, TRUE);
5442 symtab_hdr = &elf_symtab_hdr (abfd);
5443 sym_hashes = elf_sym_hashes (abfd);
5444 sreloc = NULL;
5445 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5446 rel_end = relocs + sec->reloc_count;
5447 for (rel = relocs; rel < rel_end; rel++)
5448 {
5449 unsigned long r_symndx;
5450 struct elf_link_hash_entry *h;
5451 enum elf_ppc64_reloc_type r_type;
5452 int tls_type;
5453 struct _ppc64_elf_section_data *ppc64_sec;
5454 struct plt_entry **ifunc, **plt_list;
5455
5456 r_symndx = ELF64_R_SYM (rel->r_info);
5457 if (r_symndx < symtab_hdr->sh_info)
5458 h = NULL;
5459 else
5460 {
5461 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5462 h = elf_follow_link (h);
5463
5464 if (h == htab->elf.hgot)
5465 sec->has_toc_reloc = 1;
5466 }
5467
5468 tls_type = 0;
5469 ifunc = NULL;
5470 if (h != NULL)
5471 {
5472 if (h->type == STT_GNU_IFUNC)
5473 {
5474 h->needs_plt = 1;
5475 ifunc = &h->plt.plist;
5476 }
5477 }
5478 else
5479 {
5480 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5481 abfd, r_symndx);
5482 if (isym == NULL)
5483 return FALSE;
5484
5485 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5486 {
5487 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5488 rel->r_addend, PLT_IFUNC);
5489 if (ifunc == NULL)
5490 return FALSE;
5491 }
5492 }
5493
5494 r_type = ELF64_R_TYPE (rel->r_info);
5495 switch (r_type)
5496 {
5497 case R_PPC64_TLSGD:
5498 case R_PPC64_TLSLD:
5499 /* These special tls relocs tie a call to __tls_get_addr with
5500 its parameter symbol. */
5501 break;
5502
5503 case R_PPC64_GOT_TLSLD16:
5504 case R_PPC64_GOT_TLSLD16_LO:
5505 case R_PPC64_GOT_TLSLD16_HI:
5506 case R_PPC64_GOT_TLSLD16_HA:
5507 tls_type = TLS_TLS | TLS_LD;
5508 goto dogottls;
5509
5510 case R_PPC64_GOT_TLSGD16:
5511 case R_PPC64_GOT_TLSGD16_LO:
5512 case R_PPC64_GOT_TLSGD16_HI:
5513 case R_PPC64_GOT_TLSGD16_HA:
5514 tls_type = TLS_TLS | TLS_GD;
5515 goto dogottls;
5516
5517 case R_PPC64_GOT_TPREL16_DS:
5518 case R_PPC64_GOT_TPREL16_LO_DS:
5519 case R_PPC64_GOT_TPREL16_HI:
5520 case R_PPC64_GOT_TPREL16_HA:
5521 if (bfd_link_dll (info))
5522 info->flags |= DF_STATIC_TLS;
5523 tls_type = TLS_TLS | TLS_TPREL;
5524 goto dogottls;
5525
5526 case R_PPC64_GOT_DTPREL16_DS:
5527 case R_PPC64_GOT_DTPREL16_LO_DS:
5528 case R_PPC64_GOT_DTPREL16_HI:
5529 case R_PPC64_GOT_DTPREL16_HA:
5530 tls_type = TLS_TLS | TLS_DTPREL;
5531 dogottls:
5532 sec->has_tls_reloc = 1;
5533 /* Fall through */
5534
5535 case R_PPC64_GOT16:
5536 case R_PPC64_GOT16_DS:
5537 case R_PPC64_GOT16_HA:
5538 case R_PPC64_GOT16_HI:
5539 case R_PPC64_GOT16_LO:
5540 case R_PPC64_GOT16_LO_DS:
5541 /* This symbol requires a global offset table entry. */
5542 sec->has_toc_reloc = 1;
5543 if (r_type == R_PPC64_GOT_TLSLD16
5544 || r_type == R_PPC64_GOT_TLSGD16
5545 || r_type == R_PPC64_GOT_TPREL16_DS
5546 || r_type == R_PPC64_GOT_DTPREL16_DS
5547 || r_type == R_PPC64_GOT16
5548 || r_type == R_PPC64_GOT16_DS)
5549 {
5550 htab->do_multi_toc = 1;
5551 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5552 }
5553
5554 if (ppc64_elf_tdata (abfd)->got == NULL
5555 && !create_got_section (abfd, info))
5556 return FALSE;
5557
5558 if (h != NULL)
5559 {
5560 struct ppc_link_hash_entry *eh;
5561 struct got_entry *ent;
5562
5563 eh = (struct ppc_link_hash_entry *) h;
5564 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5565 if (ent->addend == rel->r_addend
5566 && ent->owner == abfd
5567 && ent->tls_type == tls_type)
5568 break;
5569 if (ent == NULL)
5570 {
5571 bfd_size_type amt = sizeof (*ent);
5572 ent = bfd_alloc (abfd, amt);
5573 if (ent == NULL)
5574 return FALSE;
5575 ent->next = eh->elf.got.glist;
5576 ent->addend = rel->r_addend;
5577 ent->owner = abfd;
5578 ent->tls_type = tls_type;
5579 ent->is_indirect = FALSE;
5580 ent->got.refcount = 0;
5581 eh->elf.got.glist = ent;
5582 }
5583 ent->got.refcount += 1;
5584 eh->tls_mask |= tls_type;
5585 }
5586 else
5587 /* This is a global offset table entry for a local symbol. */
5588 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5589 rel->r_addend, tls_type))
5590 return FALSE;
5591
5592 /* We may also need a plt entry if the symbol turns out to be
5593 an ifunc. */
5594 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5595 {
5596 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5597 return FALSE;
5598 }
5599 break;
5600
5601 case R_PPC64_PLT16_HA:
5602 case R_PPC64_PLT16_HI:
5603 case R_PPC64_PLT16_LO:
5604 case R_PPC64_PLT32:
5605 case R_PPC64_PLT64:
5606 /* This symbol requires a procedure linkage table entry. */
5607 plt_list = ifunc;
5608 if (h != NULL)
5609 {
5610 h->needs_plt = 1;
5611 if (h->root.root.string[0] == '.'
5612 && h->root.root.string[1] != '\0')
5613 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5614 plt_list = &h->plt.plist;
5615 }
5616 if (plt_list == NULL)
5617 {
5618 /* It does not make sense to have a procedure linkage
5619 table entry for a non-ifunc local symbol. */
5620 info->callbacks->einfo
5621 /* xgettext:c-format */
5622 (_("%H: %s reloc against local symbol\n"),
5623 abfd, sec, rel->r_offset,
5624 ppc64_elf_howto_table[r_type]->name);
5625 bfd_set_error (bfd_error_bad_value);
5626 return FALSE;
5627 }
5628 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5629 return FALSE;
5630 break;
5631
5632 /* The following relocations don't need to propagate the
5633 relocation if linking a shared object since they are
5634 section relative. */
5635 case R_PPC64_SECTOFF:
5636 case R_PPC64_SECTOFF_LO:
5637 case R_PPC64_SECTOFF_HI:
5638 case R_PPC64_SECTOFF_HA:
5639 case R_PPC64_SECTOFF_DS:
5640 case R_PPC64_SECTOFF_LO_DS:
5641 case R_PPC64_DTPREL16:
5642 case R_PPC64_DTPREL16_LO:
5643 case R_PPC64_DTPREL16_HI:
5644 case R_PPC64_DTPREL16_HA:
5645 case R_PPC64_DTPREL16_DS:
5646 case R_PPC64_DTPREL16_LO_DS:
5647 case R_PPC64_DTPREL16_HIGH:
5648 case R_PPC64_DTPREL16_HIGHA:
5649 case R_PPC64_DTPREL16_HIGHER:
5650 case R_PPC64_DTPREL16_HIGHERA:
5651 case R_PPC64_DTPREL16_HIGHEST:
5652 case R_PPC64_DTPREL16_HIGHESTA:
5653 break;
5654
5655 /* Nor do these. */
5656 case R_PPC64_REL16:
5657 case R_PPC64_REL16_LO:
5658 case R_PPC64_REL16_HI:
5659 case R_PPC64_REL16_HA:
5660 case R_PPC64_REL16DX_HA:
5661 break;
5662
5663 /* Not supported as a dynamic relocation. */
5664 case R_PPC64_ADDR64_LOCAL:
5665 if (bfd_link_pic (info))
5666 {
5667 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5668 ppc_howto_init ();
5669 /* xgettext:c-format */
5670 info->callbacks->einfo (_("%H: %s reloc unsupported "
5671 "in shared libraries and PIEs\n"),
5672 abfd, sec, rel->r_offset,
5673 ppc64_elf_howto_table[r_type]->name);
5674 bfd_set_error (bfd_error_bad_value);
5675 return FALSE;
5676 }
5677 break;
5678
5679 case R_PPC64_TOC16:
5680 case R_PPC64_TOC16_DS:
5681 htab->do_multi_toc = 1;
5682 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5683 /* Fall through. */
5684 case R_PPC64_TOC16_LO:
5685 case R_PPC64_TOC16_HI:
5686 case R_PPC64_TOC16_HA:
5687 case R_PPC64_TOC16_LO_DS:
5688 sec->has_toc_reloc = 1;
5689 break;
5690
5691 /* Marker reloc. */
5692 case R_PPC64_ENTRY:
5693 break;
5694
5695 /* This relocation describes the C++ object vtable hierarchy.
5696 Reconstruct it for later use during GC. */
5697 case R_PPC64_GNU_VTINHERIT:
5698 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5699 return FALSE;
5700 break;
5701
5702 /* This relocation describes which C++ vtable entries are actually
5703 used. Record for later use during GC. */
5704 case R_PPC64_GNU_VTENTRY:
5705 BFD_ASSERT (h != NULL);
5706 if (h != NULL
5707 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5708 return FALSE;
5709 break;
5710
5711 case R_PPC64_REL14:
5712 case R_PPC64_REL14_BRTAKEN:
5713 case R_PPC64_REL14_BRNTAKEN:
5714 {
5715 asection *dest = NULL;
5716
5717 /* Heuristic: If jumping outside our section, chances are
5718 we are going to need a stub. */
5719 if (h != NULL)
5720 {
5721 /* If the sym is weak it may be overridden later, so
5722 don't assume we know where a weak sym lives. */
5723 if (h->root.type == bfd_link_hash_defined)
5724 dest = h->root.u.def.section;
5725 }
5726 else
5727 {
5728 Elf_Internal_Sym *isym;
5729
5730 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5731 abfd, r_symndx);
5732 if (isym == NULL)
5733 return FALSE;
5734
5735 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5736 }
5737
5738 if (dest != sec)
5739 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5740 }
5741 /* Fall through. */
5742
5743 case R_PPC64_REL24:
5744 plt_list = ifunc;
5745 if (h != NULL)
5746 {
5747 h->needs_plt = 1;
5748 if (h->root.root.string[0] == '.'
5749 && h->root.root.string[1] != '\0')
5750 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5751
5752 if (h == tga || h == dottga)
5753 {
5754 sec->has_tls_reloc = 1;
5755 if (rel != relocs
5756 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5757 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5758 /* We have a new-style __tls_get_addr call with
5759 a marker reloc. */
5760 ;
5761 else
5762 /* Mark this section as having an old-style call. */
5763 sec->has_tls_get_addr_call = 1;
5764 }
5765 plt_list = &h->plt.plist;
5766 }
5767
5768 /* We may need a .plt entry if the function this reloc
5769 refers to is in a shared lib. */
5770 if (plt_list
5771 && !update_plt_info (abfd, plt_list, rel->r_addend))
5772 return FALSE;
5773 break;
5774
5775 case R_PPC64_ADDR14:
5776 case R_PPC64_ADDR14_BRNTAKEN:
5777 case R_PPC64_ADDR14_BRTAKEN:
5778 case R_PPC64_ADDR24:
5779 goto dodyn;
5780
5781 case R_PPC64_TPREL64:
5782 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5783 if (bfd_link_dll (info))
5784 info->flags |= DF_STATIC_TLS;
5785 goto dotlstoc;
5786
5787 case R_PPC64_DTPMOD64:
5788 if (rel + 1 < rel_end
5789 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5790 && rel[1].r_offset == rel->r_offset + 8)
5791 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5792 else
5793 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5794 goto dotlstoc;
5795
5796 case R_PPC64_DTPREL64:
5797 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5798 if (rel != relocs
5799 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5800 && rel[-1].r_offset == rel->r_offset - 8)
5801 /* This is the second reloc of a dtpmod, dtprel pair.
5802 Don't mark with TLS_DTPREL. */
5803 goto dodyn;
5804
5805 dotlstoc:
5806 sec->has_tls_reloc = 1;
5807 if (h != NULL)
5808 {
5809 struct ppc_link_hash_entry *eh;
5810 eh = (struct ppc_link_hash_entry *) h;
5811 eh->tls_mask |= tls_type;
5812 }
5813 else
5814 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5815 rel->r_addend, tls_type))
5816 return FALSE;
5817
5818 ppc64_sec = ppc64_elf_section_data (sec);
5819 if (ppc64_sec->sec_type != sec_toc)
5820 {
5821 bfd_size_type amt;
5822
5823 /* One extra to simplify get_tls_mask. */
5824 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5825 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5826 if (ppc64_sec->u.toc.symndx == NULL)
5827 return FALSE;
5828 amt = sec->size * sizeof (bfd_vma) / 8;
5829 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5830 if (ppc64_sec->u.toc.add == NULL)
5831 return FALSE;
5832 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5833 ppc64_sec->sec_type = sec_toc;
5834 }
5835 BFD_ASSERT (rel->r_offset % 8 == 0);
5836 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5837 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5838
5839 /* Mark the second slot of a GD or LD entry.
5840 -1 to indicate GD and -2 to indicate LD. */
5841 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5842 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5843 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5844 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5845 goto dodyn;
5846
5847 case R_PPC64_TPREL16:
5848 case R_PPC64_TPREL16_LO:
5849 case R_PPC64_TPREL16_HI:
5850 case R_PPC64_TPREL16_HA:
5851 case R_PPC64_TPREL16_DS:
5852 case R_PPC64_TPREL16_LO_DS:
5853 case R_PPC64_TPREL16_HIGH:
5854 case R_PPC64_TPREL16_HIGHA:
5855 case R_PPC64_TPREL16_HIGHER:
5856 case R_PPC64_TPREL16_HIGHERA:
5857 case R_PPC64_TPREL16_HIGHEST:
5858 case R_PPC64_TPREL16_HIGHESTA:
5859 if (bfd_link_dll (info))
5860 info->flags |= DF_STATIC_TLS;
5861 goto dodyn;
5862
5863 case R_PPC64_ADDR64:
5864 if (is_opd
5865 && rel + 1 < rel_end
5866 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5867 {
5868 if (h != NULL)
5869 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5870 }
5871 /* Fall through. */
5872
5873 case R_PPC64_ADDR16:
5874 case R_PPC64_ADDR16_DS:
5875 case R_PPC64_ADDR16_HA:
5876 case R_PPC64_ADDR16_HI:
5877 case R_PPC64_ADDR16_HIGH:
5878 case R_PPC64_ADDR16_HIGHA:
5879 case R_PPC64_ADDR16_HIGHER:
5880 case R_PPC64_ADDR16_HIGHERA:
5881 case R_PPC64_ADDR16_HIGHEST:
5882 case R_PPC64_ADDR16_HIGHESTA:
5883 case R_PPC64_ADDR16_LO:
5884 case R_PPC64_ADDR16_LO_DS:
5885 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5886 && rel->r_addend == 0)
5887 {
5888 /* We may need a .plt entry if this reloc refers to a
5889 function in a shared lib. */
5890 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5891 return FALSE;
5892 h->pointer_equality_needed = 1;
5893 }
5894 /* Fall through. */
5895
5896 case R_PPC64_REL30:
5897 case R_PPC64_REL32:
5898 case R_PPC64_REL64:
5899 case R_PPC64_ADDR32:
5900 case R_PPC64_UADDR16:
5901 case R_PPC64_UADDR32:
5902 case R_PPC64_UADDR64:
5903 case R_PPC64_TOC:
5904 if (h != NULL && !bfd_link_pic (info))
5905 /* We may need a copy reloc. */
5906 h->non_got_ref = 1;
5907
5908 /* Don't propagate .opd relocs. */
5909 if (NO_OPD_RELOCS && is_opd)
5910 break;
5911
5912 /* If we are creating a shared library, and this is a reloc
5913 against a global symbol, or a non PC relative reloc
5914 against a local symbol, then we need to copy the reloc
5915 into the shared library. However, if we are linking with
5916 -Bsymbolic, we do not need to copy a reloc against a
5917 global symbol which is defined in an object we are
5918 including in the link (i.e., DEF_REGULAR is set). At
5919 this point we have not seen all the input files, so it is
5920 possible that DEF_REGULAR is not set now but will be set
5921 later (it is never cleared). In case of a weak definition,
5922 DEF_REGULAR may be cleared later by a strong definition in
5923 a shared library. We account for that possibility below by
5924 storing information in the dyn_relocs field of the hash
5925 table entry. A similar situation occurs when creating
5926 shared libraries and symbol visibility changes render the
5927 symbol local.
5928
5929 If on the other hand, we are creating an executable, we
5930 may need to keep relocations for symbols satisfied by a
5931 dynamic library if we manage to avoid copy relocs for the
5932 symbol. */
5933 dodyn:
5934 if ((bfd_link_pic (info)
5935 && (must_be_dyn_reloc (info, r_type)
5936 || (h != NULL
5937 && (!SYMBOLIC_BIND (info, h)
5938 || h->root.type == bfd_link_hash_defweak
5939 || !h->def_regular))))
5940 || (ELIMINATE_COPY_RELOCS
5941 && !bfd_link_pic (info)
5942 && h != NULL
5943 && (h->root.type == bfd_link_hash_defweak
5944 || !h->def_regular))
5945 || (!bfd_link_pic (info)
5946 && ifunc != NULL))
5947 {
5948 /* We must copy these reloc types into the output file.
5949 Create a reloc section in dynobj and make room for
5950 this reloc. */
5951 if (sreloc == NULL)
5952 {
5953 sreloc = _bfd_elf_make_dynamic_reloc_section
5954 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5955
5956 if (sreloc == NULL)
5957 return FALSE;
5958 }
5959
5960 /* If this is a global symbol, we count the number of
5961 relocations we need for this symbol. */
5962 if (h != NULL)
5963 {
5964 struct elf_dyn_relocs *p;
5965 struct elf_dyn_relocs **head;
5966
5967 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5968 p = *head;
5969 if (p == NULL || p->sec != sec)
5970 {
5971 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5972 if (p == NULL)
5973 return FALSE;
5974 p->next = *head;
5975 *head = p;
5976 p->sec = sec;
5977 p->count = 0;
5978 p->pc_count = 0;
5979 }
5980 p->count += 1;
5981 if (!must_be_dyn_reloc (info, r_type))
5982 p->pc_count += 1;
5983 }
5984 else
5985 {
5986 /* Track dynamic relocs needed for local syms too.
5987 We really need local syms available to do this
5988 easily. Oh well. */
5989 struct ppc_dyn_relocs *p;
5990 struct ppc_dyn_relocs **head;
5991 bfd_boolean is_ifunc;
5992 asection *s;
5993 void *vpp;
5994 Elf_Internal_Sym *isym;
5995
5996 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5997 abfd, r_symndx);
5998 if (isym == NULL)
5999 return FALSE;
6000
6001 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6002 if (s == NULL)
6003 s = sec;
6004
6005 vpp = &elf_section_data (s)->local_dynrel;
6006 head = (struct ppc_dyn_relocs **) vpp;
6007 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6008 p = *head;
6009 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6010 p = p->next;
6011 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6012 {
6013 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6014 if (p == NULL)
6015 return FALSE;
6016 p->next = *head;
6017 *head = p;
6018 p->sec = sec;
6019 p->ifunc = is_ifunc;
6020 p->count = 0;
6021 }
6022 p->count += 1;
6023 }
6024 }
6025 break;
6026
6027 default:
6028 break;
6029 }
6030 }
6031
6032 return TRUE;
6033 }
6034
6035 /* Merge backend specific data from an object file to the output
6036 object file when linking. */
6037
6038 static bfd_boolean
6039 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6040 {
6041 bfd *obfd = info->output_bfd;
6042 unsigned long iflags, oflags;
6043
6044 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6045 return TRUE;
6046
6047 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6048 return TRUE;
6049
6050 if (!_bfd_generic_verify_endian_match (ibfd, info))
6051 return FALSE;
6052
6053 iflags = elf_elfheader (ibfd)->e_flags;
6054 oflags = elf_elfheader (obfd)->e_flags;
6055
6056 if (iflags & ~EF_PPC64_ABI)
6057 {
6058 _bfd_error_handler
6059 /* xgettext:c-format */
6060 (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags);
6061 bfd_set_error (bfd_error_bad_value);
6062 return FALSE;
6063 }
6064 else if (iflags != oflags && iflags != 0)
6065 {
6066 _bfd_error_handler
6067 /* xgettext:c-format */
6068 (_("%pB: ABI version %ld is not compatible with ABI version %ld output"),
6069 ibfd, iflags, oflags);
6070 bfd_set_error (bfd_error_bad_value);
6071 return FALSE;
6072 }
6073
6074 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6075
6076 /* Merge Tag_compatibility attributes and any common GNU ones. */
6077 _bfd_elf_merge_object_attributes (ibfd, info);
6078
6079 return TRUE;
6080 }
6081
6082 static bfd_boolean
6083 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6084 {
6085 /* Print normal ELF private data. */
6086 _bfd_elf_print_private_bfd_data (abfd, ptr);
6087
6088 if (elf_elfheader (abfd)->e_flags != 0)
6089 {
6090 FILE *file = ptr;
6091
6092 fprintf (file, _("private flags = 0x%lx:"),
6093 elf_elfheader (abfd)->e_flags);
6094
6095 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6096 fprintf (file, _(" [abiv%ld]"),
6097 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6098 fputc ('\n', file);
6099 }
6100
6101 return TRUE;
6102 }
6103
6104 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6105 of the code entry point, and its section, which must be in the same
6106 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6107
6108 static bfd_vma
6109 opd_entry_value (asection *opd_sec,
6110 bfd_vma offset,
6111 asection **code_sec,
6112 bfd_vma *code_off,
6113 bfd_boolean in_code_sec)
6114 {
6115 bfd *opd_bfd = opd_sec->owner;
6116 Elf_Internal_Rela *relocs;
6117 Elf_Internal_Rela *lo, *hi, *look;
6118 bfd_vma val;
6119
6120 /* No relocs implies we are linking a --just-symbols object, or looking
6121 at a final linked executable with addr2line or somesuch. */
6122 if (opd_sec->reloc_count == 0)
6123 {
6124 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6125
6126 if (contents == NULL)
6127 {
6128 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6129 return (bfd_vma) -1;
6130 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6131 }
6132
6133 /* PR 17512: file: 64b9dfbb. */
6134 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6135 return (bfd_vma) -1;
6136
6137 val = bfd_get_64 (opd_bfd, contents + offset);
6138 if (code_sec != NULL)
6139 {
6140 asection *sec, *likely = NULL;
6141
6142 if (in_code_sec)
6143 {
6144 sec = *code_sec;
6145 if (sec->vma <= val
6146 && val < sec->vma + sec->size)
6147 likely = sec;
6148 else
6149 val = -1;
6150 }
6151 else
6152 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6153 if (sec->vma <= val
6154 && (sec->flags & SEC_LOAD) != 0
6155 && (sec->flags & SEC_ALLOC) != 0)
6156 likely = sec;
6157 if (likely != NULL)
6158 {
6159 *code_sec = likely;
6160 if (code_off != NULL)
6161 *code_off = val - likely->vma;
6162 }
6163 }
6164 return val;
6165 }
6166
6167 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6168
6169 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6170 if (relocs == NULL)
6171 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6172 /* PR 17512: file: df8e1fd6. */
6173 if (relocs == NULL)
6174 return (bfd_vma) -1;
6175
6176 /* Go find the opd reloc at the sym address. */
6177 lo = relocs;
6178 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6179 val = (bfd_vma) -1;
6180 while (lo < hi)
6181 {
6182 look = lo + (hi - lo) / 2;
6183 if (look->r_offset < offset)
6184 lo = look + 1;
6185 else if (look->r_offset > offset)
6186 hi = look;
6187 else
6188 {
6189 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6190
6191 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6192 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6193 {
6194 unsigned long symndx = ELF64_R_SYM (look->r_info);
6195 asection *sec = NULL;
6196
6197 if (symndx >= symtab_hdr->sh_info
6198 && elf_sym_hashes (opd_bfd) != NULL)
6199 {
6200 struct elf_link_hash_entry **sym_hashes;
6201 struct elf_link_hash_entry *rh;
6202
6203 sym_hashes = elf_sym_hashes (opd_bfd);
6204 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6205 if (rh != NULL)
6206 {
6207 rh = elf_follow_link (rh);
6208 if (rh->root.type != bfd_link_hash_defined
6209 && rh->root.type != bfd_link_hash_defweak)
6210 break;
6211 if (rh->root.u.def.section->owner == opd_bfd)
6212 {
6213 val = rh->root.u.def.value;
6214 sec = rh->root.u.def.section;
6215 }
6216 }
6217 }
6218
6219 if (sec == NULL)
6220 {
6221 Elf_Internal_Sym *sym;
6222
6223 if (symndx < symtab_hdr->sh_info)
6224 {
6225 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6226 if (sym == NULL)
6227 {
6228 size_t symcnt = symtab_hdr->sh_info;
6229 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6230 symcnt, 0,
6231 NULL, NULL, NULL);
6232 if (sym == NULL)
6233 break;
6234 symtab_hdr->contents = (bfd_byte *) sym;
6235 }
6236 sym += symndx;
6237 }
6238 else
6239 {
6240 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6241 1, symndx,
6242 NULL, NULL, NULL);
6243 if (sym == NULL)
6244 break;
6245 }
6246 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6247 if (sec == NULL)
6248 break;
6249 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6250 val = sym->st_value;
6251 }
6252
6253 val += look->r_addend;
6254 if (code_off != NULL)
6255 *code_off = val;
6256 if (code_sec != NULL)
6257 {
6258 if (in_code_sec && *code_sec != sec)
6259 return -1;
6260 else
6261 *code_sec = sec;
6262 }
6263 if (sec->output_section != NULL)
6264 val += sec->output_section->vma + sec->output_offset;
6265 }
6266 break;
6267 }
6268 }
6269
6270 return val;
6271 }
6272
6273 /* If the ELF symbol SYM might be a function in SEC, return the
6274 function size and set *CODE_OFF to the function's entry point,
6275 otherwise return zero. */
6276
6277 static bfd_size_type
6278 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6279 bfd_vma *code_off)
6280 {
6281 bfd_size_type size;
6282
6283 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6284 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6285 return 0;
6286
6287 size = 0;
6288 if (!(sym->flags & BSF_SYNTHETIC))
6289 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6290
6291 if (strcmp (sym->section->name, ".opd") == 0)
6292 {
6293 struct _opd_sec_data *opd = get_opd_info (sym->section);
6294 bfd_vma symval = sym->value;
6295
6296 if (opd != NULL
6297 && opd->adjust != NULL
6298 && elf_section_data (sym->section)->relocs != NULL)
6299 {
6300 /* opd_entry_value will use cached relocs that have been
6301 adjusted, but with raw symbols. That means both local
6302 and global symbols need adjusting. */
6303 long adjust = opd->adjust[OPD_NDX (symval)];
6304 if (adjust == -1)
6305 return 0;
6306 symval += adjust;
6307 }
6308
6309 if (opd_entry_value (sym->section, symval,
6310 &sec, code_off, TRUE) == (bfd_vma) -1)
6311 return 0;
6312 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6313 symbol. This size has nothing to do with the code size of the
6314 function, which is what we're supposed to return, but the
6315 code size isn't available without looking up the dot-sym.
6316 However, doing that would be a waste of time particularly
6317 since elf_find_function will look at the dot-sym anyway.
6318 Now, elf_find_function will keep the largest size of any
6319 function sym found at the code address of interest, so return
6320 1 here to avoid it incorrectly caching a larger function size
6321 for a small function. This does mean we return the wrong
6322 size for a new-ABI function of size 24, but all that does is
6323 disable caching for such functions. */
6324 if (size == 24)
6325 size = 1;
6326 }
6327 else
6328 {
6329 if (sym->section != sec)
6330 return 0;
6331 *code_off = sym->value;
6332 }
6333 if (size == 0)
6334 size = 1;
6335 return size;
6336 }
6337
6338 /* Return true if symbol is a strong function defined in an ELFv2
6339 object with st_other localentry bits of zero, ie. its local entry
6340 point coincides with its global entry point. */
6341
6342 static bfd_boolean
6343 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6344 {
6345 return (h != NULL
6346 && h->type == STT_FUNC
6347 && h->root.type == bfd_link_hash_defined
6348 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6349 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6350 && is_ppc64_elf (h->root.u.def.section->owner)
6351 && abiversion (h->root.u.def.section->owner) >= 2);
6352 }
6353
6354 /* Return true if symbol is defined in a regular object file. */
6355
6356 static bfd_boolean
6357 is_static_defined (struct elf_link_hash_entry *h)
6358 {
6359 return ((h->root.type == bfd_link_hash_defined
6360 || h->root.type == bfd_link_hash_defweak)
6361 && h->root.u.def.section != NULL
6362 && h->root.u.def.section->output_section != NULL);
6363 }
6364
6365 /* If FDH is a function descriptor symbol, return the associated code
6366 entry symbol if it is defined. Return NULL otherwise. */
6367
6368 static struct ppc_link_hash_entry *
6369 defined_code_entry (struct ppc_link_hash_entry *fdh)
6370 {
6371 if (fdh->is_func_descriptor)
6372 {
6373 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6374 if (fh->elf.root.type == bfd_link_hash_defined
6375 || fh->elf.root.type == bfd_link_hash_defweak)
6376 return fh;
6377 }
6378 return NULL;
6379 }
6380
6381 /* If FH is a function code entry symbol, return the associated
6382 function descriptor symbol if it is defined. Return NULL otherwise. */
6383
6384 static struct ppc_link_hash_entry *
6385 defined_func_desc (struct ppc_link_hash_entry *fh)
6386 {
6387 if (fh->oh != NULL
6388 && fh->oh->is_func_descriptor)
6389 {
6390 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6391 if (fdh->elf.root.type == bfd_link_hash_defined
6392 || fdh->elf.root.type == bfd_link_hash_defweak)
6393 return fdh;
6394 }
6395 return NULL;
6396 }
6397
6398 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6399
6400 /* Garbage collect sections, after first dealing with dot-symbols. */
6401
6402 static bfd_boolean
6403 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6404 {
6405 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6406
6407 if (htab != NULL && htab->need_func_desc_adj)
6408 {
6409 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6410 htab->need_func_desc_adj = 0;
6411 }
6412 return bfd_elf_gc_sections (abfd, info);
6413 }
6414
6415 /* Mark all our entry sym sections, both opd and code section. */
6416
6417 static void
6418 ppc64_elf_gc_keep (struct bfd_link_info *info)
6419 {
6420 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6421 struct bfd_sym_chain *sym;
6422
6423 if (htab == NULL)
6424 return;
6425
6426 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6427 {
6428 struct ppc_link_hash_entry *eh, *fh;
6429 asection *sec;
6430
6431 eh = (struct ppc_link_hash_entry *)
6432 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6433 if (eh == NULL)
6434 continue;
6435 if (eh->elf.root.type != bfd_link_hash_defined
6436 && eh->elf.root.type != bfd_link_hash_defweak)
6437 continue;
6438
6439 fh = defined_code_entry (eh);
6440 if (fh != NULL)
6441 {
6442 sec = fh->elf.root.u.def.section;
6443 sec->flags |= SEC_KEEP;
6444 }
6445 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6446 && opd_entry_value (eh->elf.root.u.def.section,
6447 eh->elf.root.u.def.value,
6448 &sec, NULL, FALSE) != (bfd_vma) -1)
6449 sec->flags |= SEC_KEEP;
6450
6451 sec = eh->elf.root.u.def.section;
6452 sec->flags |= SEC_KEEP;
6453 }
6454 }
6455
6456 /* Mark sections containing dynamically referenced symbols. When
6457 building shared libraries, we must assume that any visible symbol is
6458 referenced. */
6459
6460 static bfd_boolean
6461 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6462 {
6463 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6464 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6465 struct ppc_link_hash_entry *fdh;
6466 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6467
6468 /* Dynamic linking info is on the func descriptor sym. */
6469 fdh = defined_func_desc (eh);
6470 if (fdh != NULL)
6471 eh = fdh;
6472
6473 if ((eh->elf.root.type == bfd_link_hash_defined
6474 || eh->elf.root.type == bfd_link_hash_defweak)
6475 && ((eh->elf.ref_dynamic && !eh->elf.forced_local)
6476 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6477 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6478 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6479 && (!bfd_link_executable (info)
6480 || info->gc_keep_exported
6481 || info->export_dynamic
6482 || (eh->elf.dynamic
6483 && d != NULL
6484 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6485 && (eh->elf.versioned >= versioned
6486 || !bfd_hide_sym_by_version (info->version_info,
6487 eh->elf.root.root.string)))))
6488 {
6489 asection *code_sec;
6490 struct ppc_link_hash_entry *fh;
6491
6492 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6493
6494 /* Function descriptor syms cause the associated
6495 function code sym section to be marked. */
6496 fh = defined_code_entry (eh);
6497 if (fh != NULL)
6498 {
6499 code_sec = fh->elf.root.u.def.section;
6500 code_sec->flags |= SEC_KEEP;
6501 }
6502 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6503 && opd_entry_value (eh->elf.root.u.def.section,
6504 eh->elf.root.u.def.value,
6505 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6506 code_sec->flags |= SEC_KEEP;
6507 }
6508
6509 return TRUE;
6510 }
6511
6512 /* Return the section that should be marked against GC for a given
6513 relocation. */
6514
6515 static asection *
6516 ppc64_elf_gc_mark_hook (asection *sec,
6517 struct bfd_link_info *info,
6518 Elf_Internal_Rela *rel,
6519 struct elf_link_hash_entry *h,
6520 Elf_Internal_Sym *sym)
6521 {
6522 asection *rsec;
6523
6524 /* Syms return NULL if we're marking .opd, so we avoid marking all
6525 function sections, as all functions are referenced in .opd. */
6526 rsec = NULL;
6527 if (get_opd_info (sec) != NULL)
6528 return rsec;
6529
6530 if (h != NULL)
6531 {
6532 enum elf_ppc64_reloc_type r_type;
6533 struct ppc_link_hash_entry *eh, *fh, *fdh;
6534
6535 r_type = ELF64_R_TYPE (rel->r_info);
6536 switch (r_type)
6537 {
6538 case R_PPC64_GNU_VTINHERIT:
6539 case R_PPC64_GNU_VTENTRY:
6540 break;
6541
6542 default:
6543 switch (h->root.type)
6544 {
6545 case bfd_link_hash_defined:
6546 case bfd_link_hash_defweak:
6547 eh = (struct ppc_link_hash_entry *) h;
6548 fdh = defined_func_desc (eh);
6549 if (fdh != NULL)
6550 {
6551 /* -mcall-aixdesc code references the dot-symbol on
6552 a call reloc. Mark the function descriptor too
6553 against garbage collection. */
6554 fdh->elf.mark = 1;
6555 if (fdh->elf.is_weakalias)
6556 weakdef (&fdh->elf)->mark = 1;
6557 eh = fdh;
6558 }
6559
6560 /* Function descriptor syms cause the associated
6561 function code sym section to be marked. */
6562 fh = defined_code_entry (eh);
6563 if (fh != NULL)
6564 {
6565 /* They also mark their opd section. */
6566 eh->elf.root.u.def.section->gc_mark = 1;
6567
6568 rsec = fh->elf.root.u.def.section;
6569 }
6570 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6571 && opd_entry_value (eh->elf.root.u.def.section,
6572 eh->elf.root.u.def.value,
6573 &rsec, NULL, FALSE) != (bfd_vma) -1)
6574 eh->elf.root.u.def.section->gc_mark = 1;
6575 else
6576 rsec = h->root.u.def.section;
6577 break;
6578
6579 case bfd_link_hash_common:
6580 rsec = h->root.u.c.p->section;
6581 break;
6582
6583 default:
6584 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6585 }
6586 }
6587 }
6588 else
6589 {
6590 struct _opd_sec_data *opd;
6591
6592 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6593 opd = get_opd_info (rsec);
6594 if (opd != NULL && opd->func_sec != NULL)
6595 {
6596 rsec->gc_mark = 1;
6597
6598 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6599 }
6600 }
6601
6602 return rsec;
6603 }
6604
6605 /* The maximum size of .sfpr. */
6606 #define SFPR_MAX (218*4)
6607
6608 struct sfpr_def_parms
6609 {
6610 const char name[12];
6611 unsigned char lo, hi;
6612 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6613 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6614 };
6615
6616 /* Auto-generate _save*, _rest* functions in .sfpr.
6617 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6618 instead. */
6619
6620 static bfd_boolean
6621 sfpr_define (struct bfd_link_info *info,
6622 const struct sfpr_def_parms *parm,
6623 asection *stub_sec)
6624 {
6625 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6626 unsigned int i;
6627 size_t len = strlen (parm->name);
6628 bfd_boolean writing = FALSE;
6629 char sym[16];
6630
6631 if (htab == NULL)
6632 return FALSE;
6633
6634 memcpy (sym, parm->name, len);
6635 sym[len + 2] = 0;
6636
6637 for (i = parm->lo; i <= parm->hi; i++)
6638 {
6639 struct ppc_link_hash_entry *h;
6640
6641 sym[len + 0] = i / 10 + '0';
6642 sym[len + 1] = i % 10 + '0';
6643 h = (struct ppc_link_hash_entry *)
6644 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6645 if (stub_sec != NULL)
6646 {
6647 if (h != NULL
6648 && h->elf.root.type == bfd_link_hash_defined
6649 && h->elf.root.u.def.section == htab->sfpr)
6650 {
6651 struct elf_link_hash_entry *s;
6652 char buf[32];
6653 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6654 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6655 if (s == NULL)
6656 return FALSE;
6657 if (s->root.type == bfd_link_hash_new
6658 || (s->root.type = bfd_link_hash_defined
6659 && s->root.u.def.section == stub_sec))
6660 {
6661 s->root.type = bfd_link_hash_defined;
6662 s->root.u.def.section = stub_sec;
6663 s->root.u.def.value = (stub_sec->size - htab->sfpr->size
6664 + h->elf.root.u.def.value);
6665 s->ref_regular = 1;
6666 s->def_regular = 1;
6667 s->ref_regular_nonweak = 1;
6668 s->forced_local = 1;
6669 s->non_elf = 0;
6670 s->root.linker_def = 1;
6671 }
6672 }
6673 continue;
6674 }
6675 if (h != NULL)
6676 {
6677 h->save_res = 1;
6678 if (!h->elf.def_regular)
6679 {
6680 h->elf.root.type = bfd_link_hash_defined;
6681 h->elf.root.u.def.section = htab->sfpr;
6682 h->elf.root.u.def.value = htab->sfpr->size;
6683 h->elf.type = STT_FUNC;
6684 h->elf.def_regular = 1;
6685 h->elf.non_elf = 0;
6686 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6687 writing = TRUE;
6688 if (htab->sfpr->contents == NULL)
6689 {
6690 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6691 if (htab->sfpr->contents == NULL)
6692 return FALSE;
6693 }
6694 }
6695 }
6696 if (writing)
6697 {
6698 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6699 if (i != parm->hi)
6700 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6701 else
6702 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6703 htab->sfpr->size = p - htab->sfpr->contents;
6704 }
6705 }
6706
6707 return TRUE;
6708 }
6709
6710 static bfd_byte *
6711 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6712 {
6713 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6714 return p + 4;
6715 }
6716
6717 static bfd_byte *
6718 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6719 {
6720 p = savegpr0 (abfd, p, r);
6721 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6722 p = p + 4;
6723 bfd_put_32 (abfd, BLR, p);
6724 return p + 4;
6725 }
6726
6727 static bfd_byte *
6728 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6729 {
6730 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6731 return p + 4;
6732 }
6733
6734 static bfd_byte *
6735 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6736 {
6737 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6738 p = p + 4;
6739 p = restgpr0 (abfd, p, r);
6740 bfd_put_32 (abfd, MTLR_R0, p);
6741 p = p + 4;
6742 if (r == 29)
6743 {
6744 p = restgpr0 (abfd, p, 30);
6745 p = restgpr0 (abfd, p, 31);
6746 }
6747 bfd_put_32 (abfd, BLR, p);
6748 return p + 4;
6749 }
6750
6751 static bfd_byte *
6752 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6753 {
6754 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6755 return p + 4;
6756 }
6757
6758 static bfd_byte *
6759 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6760 {
6761 p = savegpr1 (abfd, p, r);
6762 bfd_put_32 (abfd, BLR, p);
6763 return p + 4;
6764 }
6765
6766 static bfd_byte *
6767 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6768 {
6769 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6770 return p + 4;
6771 }
6772
6773 static bfd_byte *
6774 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6775 {
6776 p = restgpr1 (abfd, p, r);
6777 bfd_put_32 (abfd, BLR, p);
6778 return p + 4;
6779 }
6780
6781 static bfd_byte *
6782 savefpr (bfd *abfd, bfd_byte *p, int r)
6783 {
6784 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6785 return p + 4;
6786 }
6787
6788 static bfd_byte *
6789 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6790 {
6791 p = savefpr (abfd, p, r);
6792 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6793 p = p + 4;
6794 bfd_put_32 (abfd, BLR, p);
6795 return p + 4;
6796 }
6797
6798 static bfd_byte *
6799 restfpr (bfd *abfd, bfd_byte *p, int r)
6800 {
6801 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6809 p = p + 4;
6810 p = restfpr (abfd, p, r);
6811 bfd_put_32 (abfd, MTLR_R0, p);
6812 p = p + 4;
6813 if (r == 29)
6814 {
6815 p = restfpr (abfd, p, 30);
6816 p = restfpr (abfd, p, 31);
6817 }
6818 bfd_put_32 (abfd, BLR, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 p = savefpr (abfd, p, r);
6826 bfd_put_32 (abfd, BLR, p);
6827 return p + 4;
6828 }
6829
6830 static bfd_byte *
6831 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6832 {
6833 p = restfpr (abfd, p, r);
6834 bfd_put_32 (abfd, BLR, p);
6835 return p + 4;
6836 }
6837
6838 static bfd_byte *
6839 savevr (bfd *abfd, bfd_byte *p, int r)
6840 {
6841 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6842 p = p + 4;
6843 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6844 return p + 4;
6845 }
6846
6847 static bfd_byte *
6848 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6849 {
6850 p = savevr (abfd, p, r);
6851 bfd_put_32 (abfd, BLR, p);
6852 return p + 4;
6853 }
6854
6855 static bfd_byte *
6856 restvr (bfd *abfd, bfd_byte *p, int r)
6857 {
6858 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6859 p = p + 4;
6860 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6861 return p + 4;
6862 }
6863
6864 static bfd_byte *
6865 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6866 {
6867 p = restvr (abfd, p, r);
6868 bfd_put_32 (abfd, BLR, p);
6869 return p + 4;
6870 }
6871
6872 /* Called via elf_link_hash_traverse to transfer dynamic linking
6873 information on function code symbol entries to their corresponding
6874 function descriptor symbol entries. */
6875
6876 static bfd_boolean
6877 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6878 {
6879 struct bfd_link_info *info;
6880 struct ppc_link_hash_table *htab;
6881 struct ppc_link_hash_entry *fh;
6882 struct ppc_link_hash_entry *fdh;
6883 bfd_boolean force_local;
6884
6885 fh = (struct ppc_link_hash_entry *) h;
6886 if (fh->elf.root.type == bfd_link_hash_indirect)
6887 return TRUE;
6888
6889 if (!fh->is_func)
6890 return TRUE;
6891
6892 if (fh->elf.root.root.string[0] != '.'
6893 || fh->elf.root.root.string[1] == '\0')
6894 return TRUE;
6895
6896 info = inf;
6897 htab = ppc_hash_table (info);
6898 if (htab == NULL)
6899 return FALSE;
6900
6901 /* Find the corresponding function descriptor symbol. */
6902 fdh = lookup_fdh (fh, htab);
6903
6904 /* Resolve undefined references to dot-symbols as the value
6905 in the function descriptor, if we have one in a regular object.
6906 This is to satisfy cases like ".quad .foo". Calls to functions
6907 in dynamic objects are handled elsewhere. */
6908 if ((fh->elf.root.type == bfd_link_hash_undefined
6909 || fh->elf.root.type == bfd_link_hash_undefweak)
6910 && (fdh->elf.root.type == bfd_link_hash_defined
6911 || fdh->elf.root.type == bfd_link_hash_defweak)
6912 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6913 && opd_entry_value (fdh->elf.root.u.def.section,
6914 fdh->elf.root.u.def.value,
6915 &fh->elf.root.u.def.section,
6916 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6917 {
6918 fh->elf.root.type = fdh->elf.root.type;
6919 fh->elf.forced_local = 1;
6920 fh->elf.def_regular = fdh->elf.def_regular;
6921 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6922 }
6923
6924 if (!fh->elf.dynamic)
6925 {
6926 struct plt_entry *ent;
6927
6928 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6929 if (ent->plt.refcount > 0)
6930 break;
6931 if (ent == NULL)
6932 return TRUE;
6933 }
6934
6935 /* Create a descriptor as undefined if necessary. */
6936 if (fdh == NULL
6937 && !bfd_link_executable (info)
6938 && (fh->elf.root.type == bfd_link_hash_undefined
6939 || fh->elf.root.type == bfd_link_hash_undefweak))
6940 {
6941 fdh = make_fdh (info, fh);
6942 if (fdh == NULL)
6943 return FALSE;
6944 }
6945
6946 /* We can't support overriding of symbols on a fake descriptor. */
6947 if (fdh != NULL
6948 && fdh->fake
6949 && (fh->elf.root.type == bfd_link_hash_defined
6950 || fh->elf.root.type == bfd_link_hash_defweak))
6951 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6952
6953 /* Transfer dynamic linking information to the function descriptor. */
6954 if (fdh != NULL)
6955 {
6956 fdh->elf.ref_regular |= fh->elf.ref_regular;
6957 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6958 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6959 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6960 fdh->elf.dynamic |= fh->elf.dynamic;
6961 fdh->elf.needs_plt |= (fh->elf.needs_plt
6962 || fh->elf.type == STT_FUNC
6963 || fh->elf.type == STT_GNU_IFUNC);
6964 move_plt_plist (fh, fdh);
6965
6966 if (!fdh->elf.forced_local
6967 && fh->elf.dynindx != -1)
6968 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6969 return FALSE;
6970 }
6971
6972 /* Now that the info is on the function descriptor, clear the
6973 function code sym info. Any function code syms for which we
6974 don't have a definition in a regular file, we force local.
6975 This prevents a shared library from exporting syms that have
6976 been imported from another library. Function code syms that
6977 are really in the library we must leave global to prevent the
6978 linker dragging in a definition from a static library. */
6979 force_local = (!fh->elf.def_regular
6980 || fdh == NULL
6981 || !fdh->elf.def_regular
6982 || fdh->elf.forced_local);
6983 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6984
6985 return TRUE;
6986 }
6987
6988 static const struct sfpr_def_parms save_res_funcs[] =
6989 {
6990 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6991 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6992 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6993 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6994 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6995 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6996 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6997 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6998 { "._savef", 14, 31, savefpr, savefpr1_tail },
6999 { "._restf", 14, 31, restfpr, restfpr1_tail },
7000 { "_savevr_", 20, 31, savevr, savevr_tail },
7001 { "_restvr_", 20, 31, restvr, restvr_tail }
7002 };
7003
7004 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7005 this hook to a) provide some gcc support functions, and b) transfer
7006 dynamic linking information gathered so far on function code symbol
7007 entries, to their corresponding function descriptor symbol entries. */
7008
7009 static bfd_boolean
7010 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7011 struct bfd_link_info *info)
7012 {
7013 struct ppc_link_hash_table *htab;
7014
7015 htab = ppc_hash_table (info);
7016 if (htab == NULL)
7017 return FALSE;
7018
7019 /* Provide any missing _save* and _rest* functions. */
7020 if (htab->sfpr != NULL)
7021 {
7022 unsigned int i;
7023
7024 htab->sfpr->size = 0;
7025 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7026 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7027 return FALSE;
7028 if (htab->sfpr->size == 0)
7029 htab->sfpr->flags |= SEC_EXCLUDE;
7030 }
7031
7032 if (bfd_link_relocatable (info))
7033 return TRUE;
7034
7035 if (htab->elf.hgot != NULL)
7036 {
7037 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7038 /* Make .TOC. defined so as to prevent it being made dynamic.
7039 The wrong value here is fixed later in ppc64_elf_set_toc. */
7040 if (!htab->elf.hgot->def_regular
7041 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7042 {
7043 htab->elf.hgot->root.type = bfd_link_hash_defined;
7044 htab->elf.hgot->root.u.def.value = 0;
7045 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7046 htab->elf.hgot->def_regular = 1;
7047 htab->elf.hgot->root.linker_def = 1;
7048 }
7049 htab->elf.hgot->type = STT_OBJECT;
7050 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7051 | STV_HIDDEN);
7052 }
7053
7054 if (htab->need_func_desc_adj)
7055 {
7056 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7057 htab->need_func_desc_adj = 0;
7058 }
7059
7060 return TRUE;
7061 }
7062
7063 /* Find dynamic relocs for H that apply to read-only sections. */
7064
7065 static asection *
7066 readonly_dynrelocs (struct elf_link_hash_entry *h)
7067 {
7068 struct ppc_link_hash_entry *eh;
7069 struct elf_dyn_relocs *p;
7070
7071 eh = (struct ppc_link_hash_entry *) h;
7072 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7073 {
7074 asection *s = p->sec->output_section;
7075
7076 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7077 return p->sec;
7078 }
7079 return NULL;
7080 }
7081
7082 /* Return true if we have dynamic relocs against H or any of its weak
7083 aliases, that apply to read-only sections. Cannot be used after
7084 size_dynamic_sections. */
7085
7086 static bfd_boolean
7087 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7088 {
7089 struct ppc_link_hash_entry *eh;
7090
7091 eh = (struct ppc_link_hash_entry *) h;
7092 do
7093 {
7094 if (readonly_dynrelocs (&eh->elf))
7095 return TRUE;
7096 eh = (struct ppc_link_hash_entry *) eh->elf.u.alias;
7097 } while (eh != NULL && &eh->elf != h);
7098
7099 return FALSE;
7100 }
7101
7102 /* Return whether EH has pc-relative dynamic relocs. */
7103
7104 static bfd_boolean
7105 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7106 {
7107 struct elf_dyn_relocs *p;
7108
7109 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7110 if (p->pc_count != 0)
7111 return TRUE;
7112 return FALSE;
7113 }
7114
7115 /* Return true if a global entry stub will be created for H. Valid
7116 for ELFv2 before plt entries have been allocated. */
7117
7118 static bfd_boolean
7119 global_entry_stub (struct elf_link_hash_entry *h)
7120 {
7121 struct plt_entry *pent;
7122
7123 if (!h->pointer_equality_needed
7124 || h->def_regular)
7125 return FALSE;
7126
7127 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7128 if (pent->plt.refcount > 0
7129 && pent->addend == 0)
7130 return TRUE;
7131
7132 return FALSE;
7133 }
7134
7135 /* Adjust a symbol defined by a dynamic object and referenced by a
7136 regular object. The current definition is in some section of the
7137 dynamic object, but we're not including those sections. We have to
7138 change the definition to something the rest of the link can
7139 understand. */
7140
7141 static bfd_boolean
7142 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7143 struct elf_link_hash_entry *h)
7144 {
7145 struct ppc_link_hash_table *htab;
7146 asection *s, *srel;
7147
7148 htab = ppc_hash_table (info);
7149 if (htab == NULL)
7150 return FALSE;
7151
7152 /* Deal with function syms. */
7153 if (h->type == STT_FUNC
7154 || h->type == STT_GNU_IFUNC
7155 || h->needs_plt)
7156 {
7157 bfd_boolean local = (((struct ppc_link_hash_entry *) h)->save_res
7158 || SYMBOL_CALLS_LOCAL (info, h)
7159 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
7160 /* Discard dyn_relocs when non-pic if we've decided that a
7161 function symbol is local and not an ifunc. We keep dynamic
7162 relocs for ifuncs when local rather than always emitting a
7163 plt call stub for them and defining the symbol on the call
7164 stub. We can't do that for ELFv1 anyway (a function symbol
7165 is defined on a descriptor, not code) and it can be faster at
7166 run-time due to not needing to bounce through a stub. The
7167 dyn_relocs for ifuncs will be applied even in a static
7168 executable. */
7169 if (!bfd_link_pic (info)
7170 && h->type != STT_GNU_IFUNC
7171 && local)
7172 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7173
7174 /* Clear procedure linkage table information for any symbol that
7175 won't need a .plt entry. */
7176 struct plt_entry *ent;
7177 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7178 if (ent->plt.refcount > 0)
7179 break;
7180 if (ent == NULL
7181 || (h->type != STT_GNU_IFUNC && local))
7182 {
7183 h->plt.plist = NULL;
7184 h->needs_plt = 0;
7185 h->pointer_equality_needed = 0;
7186 }
7187 else if (abiversion (info->output_bfd) >= 2)
7188 {
7189 /* Taking a function's address in a read/write section
7190 doesn't require us to define the function symbol in the
7191 executable on a global entry stub. A dynamic reloc can
7192 be used instead. The reason we prefer a few more dynamic
7193 relocs is that calling via a global entry stub costs a
7194 few more instructions, and pointer_equality_needed causes
7195 extra work in ld.so when resolving these symbols. */
7196 if (global_entry_stub (h))
7197 {
7198 if (!readonly_dynrelocs (h))
7199 {
7200 h->pointer_equality_needed = 0;
7201 /* If we haven't seen a branch reloc then we don't need
7202 a plt entry. */
7203 if (!h->needs_plt)
7204 h->plt.plist = NULL;
7205 }
7206 else if (!bfd_link_pic (info))
7207 /* We are going to be defining the function symbol on the
7208 plt stub, so no dyn_relocs needed when non-pic. */
7209 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7210 }
7211
7212 /* ELFv2 function symbols can't have copy relocs. */
7213 return TRUE;
7214 }
7215 else if (!h->needs_plt
7216 && !readonly_dynrelocs (h))
7217 {
7218 /* If we haven't seen a branch reloc then we don't need a
7219 plt entry. */
7220 h->plt.plist = NULL;
7221 h->pointer_equality_needed = 0;
7222 return TRUE;
7223 }
7224 }
7225 else
7226 h->plt.plist = NULL;
7227
7228 /* If this is a weak symbol, and there is a real definition, the
7229 processor independent code will have arranged for us to see the
7230 real definition first, and we can just use the same value. */
7231 if (h->is_weakalias)
7232 {
7233 struct elf_link_hash_entry *def = weakdef (h);
7234 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7235 h->root.u.def.section = def->root.u.def.section;
7236 h->root.u.def.value = def->root.u.def.value;
7237 if (def->root.u.def.section == htab->elf.sdynbss
7238 || def->root.u.def.section == htab->elf.sdynrelro)
7239 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7240 return TRUE;
7241 }
7242
7243 /* If we are creating a shared library, we must presume that the
7244 only references to the symbol are via the global offset table.
7245 For such cases we need not do anything here; the relocations will
7246 be handled correctly by relocate_section. */
7247 if (bfd_link_pic (info))
7248 return TRUE;
7249
7250 /* If there are no references to this symbol that do not use the
7251 GOT, we don't need to generate a copy reloc. */
7252 if (!h->non_got_ref)
7253 return TRUE;
7254
7255 /* Don't generate a copy reloc for symbols defined in the executable. */
7256 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7257
7258 /* If -z nocopyreloc was given, don't generate them either. */
7259 || info->nocopyreloc
7260
7261 /* If we don't find any dynamic relocs in read-only sections, then
7262 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7263 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7264
7265 /* Protected variables do not work with .dynbss. The copy in
7266 .dynbss won't be used by the shared library with the protected
7267 definition for the variable. Text relocations are preferable
7268 to an incorrect program. */
7269 || h->protected_def)
7270 return TRUE;
7271
7272 if (h->plt.plist != NULL)
7273 {
7274 /* We should never get here, but unfortunately there are versions
7275 of gcc out there that improperly (for this ABI) put initialized
7276 function pointers, vtable refs and suchlike in read-only
7277 sections. Allow them to proceed, but warn that this might
7278 break at runtime. */
7279 info->callbacks->einfo
7280 (_("%P: copy reloc against `%pT' requires lazy plt linking; "
7281 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7282 h->root.root.string);
7283 }
7284
7285 /* This is a reference to a symbol defined by a dynamic object which
7286 is not a function. */
7287
7288 /* We must allocate the symbol in our .dynbss section, which will
7289 become part of the .bss section of the executable. There will be
7290 an entry for this symbol in the .dynsym section. The dynamic
7291 object will contain position independent code, so all references
7292 from the dynamic object to this symbol will go through the global
7293 offset table. The dynamic linker will use the .dynsym entry to
7294 determine the address it must put in the global offset table, so
7295 both the dynamic object and the regular object will refer to the
7296 same memory location for the variable. */
7297 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7298 {
7299 s = htab->elf.sdynrelro;
7300 srel = htab->elf.sreldynrelro;
7301 }
7302 else
7303 {
7304 s = htab->elf.sdynbss;
7305 srel = htab->elf.srelbss;
7306 }
7307 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7308 {
7309 /* We must generate a R_PPC64_COPY reloc to tell the dynamic
7310 linker to copy the initial value out of the dynamic object
7311 and into the runtime process image. */
7312 srel->size += sizeof (Elf64_External_Rela);
7313 h->needs_copy = 1;
7314 }
7315
7316 /* We no longer want dyn_relocs. */
7317 ((struct ppc_link_hash_entry *) h)->dyn_relocs = NULL;
7318 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7319 }
7320
7321 /* If given a function descriptor symbol, hide both the function code
7322 sym and the descriptor. */
7323 static void
7324 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7325 struct elf_link_hash_entry *h,
7326 bfd_boolean force_local)
7327 {
7328 struct ppc_link_hash_entry *eh;
7329 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7330
7331 eh = (struct ppc_link_hash_entry *) h;
7332 if (eh->is_func_descriptor)
7333 {
7334 struct ppc_link_hash_entry *fh = eh->oh;
7335
7336 if (fh == NULL)
7337 {
7338 const char *p, *q;
7339 struct elf_link_hash_table *htab = elf_hash_table (info);
7340 char save;
7341
7342 /* We aren't supposed to use alloca in BFD because on
7343 systems which do not have alloca the version in libiberty
7344 calls xmalloc, which might cause the program to crash
7345 when it runs out of memory. This function doesn't have a
7346 return status, so there's no way to gracefully return an
7347 error. So cheat. We know that string[-1] can be safely
7348 accessed; It's either a string in an ELF string table,
7349 or allocated in an objalloc structure. */
7350
7351 p = eh->elf.root.root.string - 1;
7352 save = *p;
7353 *(char *) p = '.';
7354 fh = (struct ppc_link_hash_entry *)
7355 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7356 *(char *) p = save;
7357
7358 /* Unfortunately, if it so happens that the string we were
7359 looking for was allocated immediately before this string,
7360 then we overwrote the string terminator. That's the only
7361 reason the lookup should fail. */
7362 if (fh == NULL)
7363 {
7364 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7365 while (q >= eh->elf.root.root.string && *q == *p)
7366 --q, --p;
7367 if (q < eh->elf.root.root.string && *p == '.')
7368 fh = (struct ppc_link_hash_entry *)
7369 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7370 }
7371 if (fh != NULL)
7372 {
7373 eh->oh = fh;
7374 fh->oh = eh;
7375 }
7376 }
7377 if (fh != NULL)
7378 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7379 }
7380 }
7381
7382 static bfd_boolean
7383 get_sym_h (struct elf_link_hash_entry **hp,
7384 Elf_Internal_Sym **symp,
7385 asection **symsecp,
7386 unsigned char **tls_maskp,
7387 Elf_Internal_Sym **locsymsp,
7388 unsigned long r_symndx,
7389 bfd *ibfd)
7390 {
7391 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7392
7393 if (r_symndx >= symtab_hdr->sh_info)
7394 {
7395 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7396 struct elf_link_hash_entry *h;
7397
7398 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7399 h = elf_follow_link (h);
7400
7401 if (hp != NULL)
7402 *hp = h;
7403
7404 if (symp != NULL)
7405 *symp = NULL;
7406
7407 if (symsecp != NULL)
7408 {
7409 asection *symsec = NULL;
7410 if (h->root.type == bfd_link_hash_defined
7411 || h->root.type == bfd_link_hash_defweak)
7412 symsec = h->root.u.def.section;
7413 *symsecp = symsec;
7414 }
7415
7416 if (tls_maskp != NULL)
7417 {
7418 struct ppc_link_hash_entry *eh;
7419
7420 eh = (struct ppc_link_hash_entry *) h;
7421 *tls_maskp = &eh->tls_mask;
7422 }
7423 }
7424 else
7425 {
7426 Elf_Internal_Sym *sym;
7427 Elf_Internal_Sym *locsyms = *locsymsp;
7428
7429 if (locsyms == NULL)
7430 {
7431 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7432 if (locsyms == NULL)
7433 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7434 symtab_hdr->sh_info,
7435 0, NULL, NULL, NULL);
7436 if (locsyms == NULL)
7437 return FALSE;
7438 *locsymsp = locsyms;
7439 }
7440 sym = locsyms + r_symndx;
7441
7442 if (hp != NULL)
7443 *hp = NULL;
7444
7445 if (symp != NULL)
7446 *symp = sym;
7447
7448 if (symsecp != NULL)
7449 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7450
7451 if (tls_maskp != NULL)
7452 {
7453 struct got_entry **lgot_ents;
7454 unsigned char *tls_mask;
7455
7456 tls_mask = NULL;
7457 lgot_ents = elf_local_got_ents (ibfd);
7458 if (lgot_ents != NULL)
7459 {
7460 struct plt_entry **local_plt = (struct plt_entry **)
7461 (lgot_ents + symtab_hdr->sh_info);
7462 unsigned char *lgot_masks = (unsigned char *)
7463 (local_plt + symtab_hdr->sh_info);
7464 tls_mask = &lgot_masks[r_symndx];
7465 }
7466 *tls_maskp = tls_mask;
7467 }
7468 }
7469 return TRUE;
7470 }
7471
7472 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7473 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7474 type suitable for optimization, and 1 otherwise. */
7475
7476 static int
7477 get_tls_mask (unsigned char **tls_maskp,
7478 unsigned long *toc_symndx,
7479 bfd_vma *toc_addend,
7480 Elf_Internal_Sym **locsymsp,
7481 const Elf_Internal_Rela *rel,
7482 bfd *ibfd)
7483 {
7484 unsigned long r_symndx;
7485 int next_r;
7486 struct elf_link_hash_entry *h;
7487 Elf_Internal_Sym *sym;
7488 asection *sec;
7489 bfd_vma off;
7490
7491 r_symndx = ELF64_R_SYM (rel->r_info);
7492 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7493 return 0;
7494
7495 if ((*tls_maskp != NULL && **tls_maskp != 0)
7496 || sec == NULL
7497 || ppc64_elf_section_data (sec) == NULL
7498 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7499 return 1;
7500
7501 /* Look inside a TOC section too. */
7502 if (h != NULL)
7503 {
7504 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7505 off = h->root.u.def.value;
7506 }
7507 else
7508 off = sym->st_value;
7509 off += rel->r_addend;
7510 BFD_ASSERT (off % 8 == 0);
7511 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7512 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7513 if (toc_symndx != NULL)
7514 *toc_symndx = r_symndx;
7515 if (toc_addend != NULL)
7516 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7517 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7518 return 0;
7519 if ((h == NULL || is_static_defined (h))
7520 && (next_r == -1 || next_r == -2))
7521 return 1 - next_r;
7522 return 1;
7523 }
7524
7525 /* Find (or create) an entry in the tocsave hash table. */
7526
7527 static struct tocsave_entry *
7528 tocsave_find (struct ppc_link_hash_table *htab,
7529 enum insert_option insert,
7530 Elf_Internal_Sym **local_syms,
7531 const Elf_Internal_Rela *irela,
7532 bfd *ibfd)
7533 {
7534 unsigned long r_indx;
7535 struct elf_link_hash_entry *h;
7536 Elf_Internal_Sym *sym;
7537 struct tocsave_entry ent, *p;
7538 hashval_t hash;
7539 struct tocsave_entry **slot;
7540
7541 r_indx = ELF64_R_SYM (irela->r_info);
7542 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7543 return NULL;
7544 if (ent.sec == NULL || ent.sec->output_section == NULL)
7545 {
7546 _bfd_error_handler
7547 (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7548 return NULL;
7549 }
7550
7551 if (h != NULL)
7552 ent.offset = h->root.u.def.value;
7553 else
7554 ent.offset = sym->st_value;
7555 ent.offset += irela->r_addend;
7556
7557 hash = tocsave_htab_hash (&ent);
7558 slot = ((struct tocsave_entry **)
7559 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7560 if (slot == NULL)
7561 return NULL;
7562
7563 if (*slot == NULL)
7564 {
7565 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7566 if (p == NULL)
7567 return NULL;
7568 *p = ent;
7569 *slot = p;
7570 }
7571 return *slot;
7572 }
7573
7574 /* Adjust all global syms defined in opd sections. In gcc generated
7575 code for the old ABI, these will already have been done. */
7576
7577 static bfd_boolean
7578 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7579 {
7580 struct ppc_link_hash_entry *eh;
7581 asection *sym_sec;
7582 struct _opd_sec_data *opd;
7583
7584 if (h->root.type == bfd_link_hash_indirect)
7585 return TRUE;
7586
7587 if (h->root.type != bfd_link_hash_defined
7588 && h->root.type != bfd_link_hash_defweak)
7589 return TRUE;
7590
7591 eh = (struct ppc_link_hash_entry *) h;
7592 if (eh->adjust_done)
7593 return TRUE;
7594
7595 sym_sec = eh->elf.root.u.def.section;
7596 opd = get_opd_info (sym_sec);
7597 if (opd != NULL && opd->adjust != NULL)
7598 {
7599 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7600 if (adjust == -1)
7601 {
7602 /* This entry has been deleted. */
7603 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7604 if (dsec == NULL)
7605 {
7606 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7607 if (discarded_section (dsec))
7608 {
7609 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7610 break;
7611 }
7612 }
7613 eh->elf.root.u.def.value = 0;
7614 eh->elf.root.u.def.section = dsec;
7615 }
7616 else
7617 eh->elf.root.u.def.value += adjust;
7618 eh->adjust_done = 1;
7619 }
7620 return TRUE;
7621 }
7622
7623 /* Handles decrementing dynamic reloc counts for the reloc specified by
7624 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7625 have already been determined. */
7626
7627 static bfd_boolean
7628 dec_dynrel_count (bfd_vma r_info,
7629 asection *sec,
7630 struct bfd_link_info *info,
7631 Elf_Internal_Sym **local_syms,
7632 struct elf_link_hash_entry *h,
7633 Elf_Internal_Sym *sym)
7634 {
7635 enum elf_ppc64_reloc_type r_type;
7636 asection *sym_sec = NULL;
7637
7638 /* Can this reloc be dynamic? This switch, and later tests here
7639 should be kept in sync with the code in check_relocs. */
7640 r_type = ELF64_R_TYPE (r_info);
7641 switch (r_type)
7642 {
7643 default:
7644 return TRUE;
7645
7646 case R_PPC64_TPREL16:
7647 case R_PPC64_TPREL16_LO:
7648 case R_PPC64_TPREL16_HI:
7649 case R_PPC64_TPREL16_HA:
7650 case R_PPC64_TPREL16_DS:
7651 case R_PPC64_TPREL16_LO_DS:
7652 case R_PPC64_TPREL16_HIGH:
7653 case R_PPC64_TPREL16_HIGHA:
7654 case R_PPC64_TPREL16_HIGHER:
7655 case R_PPC64_TPREL16_HIGHERA:
7656 case R_PPC64_TPREL16_HIGHEST:
7657 case R_PPC64_TPREL16_HIGHESTA:
7658 case R_PPC64_TPREL64:
7659 case R_PPC64_DTPMOD64:
7660 case R_PPC64_DTPREL64:
7661 case R_PPC64_ADDR64:
7662 case R_PPC64_REL30:
7663 case R_PPC64_REL32:
7664 case R_PPC64_REL64:
7665 case R_PPC64_ADDR14:
7666 case R_PPC64_ADDR14_BRNTAKEN:
7667 case R_PPC64_ADDR14_BRTAKEN:
7668 case R_PPC64_ADDR16:
7669 case R_PPC64_ADDR16_DS:
7670 case R_PPC64_ADDR16_HA:
7671 case R_PPC64_ADDR16_HI:
7672 case R_PPC64_ADDR16_HIGH:
7673 case R_PPC64_ADDR16_HIGHA:
7674 case R_PPC64_ADDR16_HIGHER:
7675 case R_PPC64_ADDR16_HIGHERA:
7676 case R_PPC64_ADDR16_HIGHEST:
7677 case R_PPC64_ADDR16_HIGHESTA:
7678 case R_PPC64_ADDR16_LO:
7679 case R_PPC64_ADDR16_LO_DS:
7680 case R_PPC64_ADDR24:
7681 case R_PPC64_ADDR32:
7682 case R_PPC64_UADDR16:
7683 case R_PPC64_UADDR32:
7684 case R_PPC64_UADDR64:
7685 case R_PPC64_TOC:
7686 break;
7687 }
7688
7689 if (local_syms != NULL)
7690 {
7691 unsigned long r_symndx;
7692 bfd *ibfd = sec->owner;
7693
7694 r_symndx = ELF64_R_SYM (r_info);
7695 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7696 return FALSE;
7697 }
7698
7699 if ((bfd_link_pic (info)
7700 && (must_be_dyn_reloc (info, r_type)
7701 || (h != NULL
7702 && (!SYMBOLIC_BIND (info, h)
7703 || h->root.type == bfd_link_hash_defweak
7704 || !h->def_regular))))
7705 || (ELIMINATE_COPY_RELOCS
7706 && !bfd_link_pic (info)
7707 && h != NULL
7708 && (h->root.type == bfd_link_hash_defweak
7709 || !h->def_regular)))
7710 ;
7711 else
7712 return TRUE;
7713
7714 if (h != NULL)
7715 {
7716 struct elf_dyn_relocs *p;
7717 struct elf_dyn_relocs **pp;
7718 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7719
7720 /* elf_gc_sweep may have already removed all dyn relocs associated
7721 with local syms for a given section. Also, symbol flags are
7722 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7723 report a dynreloc miscount. */
7724 if (*pp == NULL && info->gc_sections)
7725 return TRUE;
7726
7727 while ((p = *pp) != NULL)
7728 {
7729 if (p->sec == sec)
7730 {
7731 if (!must_be_dyn_reloc (info, r_type))
7732 p->pc_count -= 1;
7733 p->count -= 1;
7734 if (p->count == 0)
7735 *pp = p->next;
7736 return TRUE;
7737 }
7738 pp = &p->next;
7739 }
7740 }
7741 else
7742 {
7743 struct ppc_dyn_relocs *p;
7744 struct ppc_dyn_relocs **pp;
7745 void *vpp;
7746 bfd_boolean is_ifunc;
7747
7748 if (local_syms == NULL)
7749 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7750 if (sym_sec == NULL)
7751 sym_sec = sec;
7752
7753 vpp = &elf_section_data (sym_sec)->local_dynrel;
7754 pp = (struct ppc_dyn_relocs **) vpp;
7755
7756 if (*pp == NULL && info->gc_sections)
7757 return TRUE;
7758
7759 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7760 while ((p = *pp) != NULL)
7761 {
7762 if (p->sec == sec && p->ifunc == is_ifunc)
7763 {
7764 p->count -= 1;
7765 if (p->count == 0)
7766 *pp = p->next;
7767 return TRUE;
7768 }
7769 pp = &p->next;
7770 }
7771 }
7772
7773 /* xgettext:c-format */
7774 _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"),
7775 sec->owner, sec);
7776 bfd_set_error (bfd_error_bad_value);
7777 return FALSE;
7778 }
7779
7780 /* Remove unused Official Procedure Descriptor entries. Currently we
7781 only remove those associated with functions in discarded link-once
7782 sections, or weakly defined functions that have been overridden. It
7783 would be possible to remove many more entries for statically linked
7784 applications. */
7785
7786 bfd_boolean
7787 ppc64_elf_edit_opd (struct bfd_link_info *info)
7788 {
7789 bfd *ibfd;
7790 bfd_boolean some_edited = FALSE;
7791 asection *need_pad = NULL;
7792 struct ppc_link_hash_table *htab;
7793
7794 htab = ppc_hash_table (info);
7795 if (htab == NULL)
7796 return FALSE;
7797
7798 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7799 {
7800 asection *sec;
7801 Elf_Internal_Rela *relstart, *rel, *relend;
7802 Elf_Internal_Shdr *symtab_hdr;
7803 Elf_Internal_Sym *local_syms;
7804 struct _opd_sec_data *opd;
7805 bfd_boolean need_edit, add_aux_fields, broken;
7806 bfd_size_type cnt_16b = 0;
7807
7808 if (!is_ppc64_elf (ibfd))
7809 continue;
7810
7811 sec = bfd_get_section_by_name (ibfd, ".opd");
7812 if (sec == NULL || sec->size == 0)
7813 continue;
7814
7815 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7816 continue;
7817
7818 if (sec->output_section == bfd_abs_section_ptr)
7819 continue;
7820
7821 /* Look through the section relocs. */
7822 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7823 continue;
7824
7825 local_syms = NULL;
7826 symtab_hdr = &elf_symtab_hdr (ibfd);
7827
7828 /* Read the relocations. */
7829 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7830 info->keep_memory);
7831 if (relstart == NULL)
7832 return FALSE;
7833
7834 /* First run through the relocs to check they are sane, and to
7835 determine whether we need to edit this opd section. */
7836 need_edit = FALSE;
7837 broken = FALSE;
7838 need_pad = sec;
7839 relend = relstart + sec->reloc_count;
7840 for (rel = relstart; rel < relend; )
7841 {
7842 enum elf_ppc64_reloc_type r_type;
7843 unsigned long r_symndx;
7844 asection *sym_sec;
7845 struct elf_link_hash_entry *h;
7846 Elf_Internal_Sym *sym;
7847 bfd_vma offset;
7848
7849 /* .opd contains an array of 16 or 24 byte entries. We're
7850 only interested in the reloc pointing to a function entry
7851 point. */
7852 offset = rel->r_offset;
7853 if (rel + 1 == relend
7854 || rel[1].r_offset != offset + 8)
7855 {
7856 /* If someone messes with .opd alignment then after a
7857 "ld -r" we might have padding in the middle of .opd.
7858 Also, there's nothing to prevent someone putting
7859 something silly in .opd with the assembler. No .opd
7860 optimization for them! */
7861 broken_opd:
7862 _bfd_error_handler
7863 (_("%pB: .opd is not a regular array of opd entries"), ibfd);
7864 broken = TRUE;
7865 break;
7866 }
7867
7868 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7869 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7870 {
7871 _bfd_error_handler
7872 /* xgettext:c-format */
7873 (_("%pB: unexpected reloc type %u in .opd section"),
7874 ibfd, r_type);
7875 broken = TRUE;
7876 break;
7877 }
7878
7879 r_symndx = ELF64_R_SYM (rel->r_info);
7880 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7881 r_symndx, ibfd))
7882 goto error_ret;
7883
7884 if (sym_sec == NULL || sym_sec->owner == NULL)
7885 {
7886 const char *sym_name;
7887 if (h != NULL)
7888 sym_name = h->root.root.string;
7889 else
7890 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7891 sym_sec);
7892
7893 _bfd_error_handler
7894 /* xgettext:c-format */
7895 (_("%pB: undefined sym `%s' in .opd section"),
7896 ibfd, sym_name);
7897 broken = TRUE;
7898 break;
7899 }
7900
7901 /* opd entries are always for functions defined in the
7902 current input bfd. If the symbol isn't defined in the
7903 input bfd, then we won't be using the function in this
7904 bfd; It must be defined in a linkonce section in another
7905 bfd, or is weak. It's also possible that we are
7906 discarding the function due to a linker script /DISCARD/,
7907 which we test for via the output_section. */
7908 if (sym_sec->owner != ibfd
7909 || sym_sec->output_section == bfd_abs_section_ptr)
7910 need_edit = TRUE;
7911
7912 rel += 2;
7913 if (rel + 1 == relend
7914 || (rel + 2 < relend
7915 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7916 ++rel;
7917
7918 if (rel == relend)
7919 {
7920 if (sec->size == offset + 24)
7921 {
7922 need_pad = NULL;
7923 break;
7924 }
7925 if (sec->size == offset + 16)
7926 {
7927 cnt_16b++;
7928 break;
7929 }
7930 goto broken_opd;
7931 }
7932 else if (rel + 1 < relend
7933 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7934 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7935 {
7936 if (rel[0].r_offset == offset + 16)
7937 cnt_16b++;
7938 else if (rel[0].r_offset != offset + 24)
7939 goto broken_opd;
7940 }
7941 else
7942 goto broken_opd;
7943 }
7944
7945 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7946
7947 if (!broken && (need_edit || add_aux_fields))
7948 {
7949 Elf_Internal_Rela *write_rel;
7950 Elf_Internal_Shdr *rel_hdr;
7951 bfd_byte *rptr, *wptr;
7952 bfd_byte *new_contents;
7953 bfd_size_type amt;
7954
7955 new_contents = NULL;
7956 amt = OPD_NDX (sec->size) * sizeof (long);
7957 opd = &ppc64_elf_section_data (sec)->u.opd;
7958 opd->adjust = bfd_zalloc (sec->owner, amt);
7959 if (opd->adjust == NULL)
7960 return FALSE;
7961
7962 /* This seems a waste of time as input .opd sections are all
7963 zeros as generated by gcc, but I suppose there's no reason
7964 this will always be so. We might start putting something in
7965 the third word of .opd entries. */
7966 if ((sec->flags & SEC_IN_MEMORY) == 0)
7967 {
7968 bfd_byte *loc;
7969 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7970 {
7971 if (loc != NULL)
7972 free (loc);
7973 error_ret:
7974 if (local_syms != NULL
7975 && symtab_hdr->contents != (unsigned char *) local_syms)
7976 free (local_syms);
7977 if (elf_section_data (sec)->relocs != relstart)
7978 free (relstart);
7979 return FALSE;
7980 }
7981 sec->contents = loc;
7982 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7983 }
7984
7985 elf_section_data (sec)->relocs = relstart;
7986
7987 new_contents = sec->contents;
7988 if (add_aux_fields)
7989 {
7990 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7991 if (new_contents == NULL)
7992 return FALSE;
7993 need_pad = NULL;
7994 }
7995 wptr = new_contents;
7996 rptr = sec->contents;
7997 write_rel = relstart;
7998 for (rel = relstart; rel < relend; )
7999 {
8000 unsigned long r_symndx;
8001 asection *sym_sec;
8002 struct elf_link_hash_entry *h;
8003 struct ppc_link_hash_entry *fdh = NULL;
8004 Elf_Internal_Sym *sym;
8005 long opd_ent_size;
8006 Elf_Internal_Rela *next_rel;
8007 bfd_boolean skip;
8008
8009 r_symndx = ELF64_R_SYM (rel->r_info);
8010 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8011 r_symndx, ibfd))
8012 goto error_ret;
8013
8014 next_rel = rel + 2;
8015 if (next_rel + 1 == relend
8016 || (next_rel + 2 < relend
8017 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8018 ++next_rel;
8019
8020 /* See if the .opd entry is full 24 byte or
8021 16 byte (with fd_aux entry overlapped with next
8022 fd_func). */
8023 opd_ent_size = 24;
8024 if (next_rel == relend)
8025 {
8026 if (sec->size == rel->r_offset + 16)
8027 opd_ent_size = 16;
8028 }
8029 else if (next_rel->r_offset == rel->r_offset + 16)
8030 opd_ent_size = 16;
8031
8032 if (h != NULL
8033 && h->root.root.string[0] == '.')
8034 {
8035 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8036 if (fdh != NULL)
8037 {
8038 fdh = ppc_follow_link (fdh);
8039 if (fdh->elf.root.type != bfd_link_hash_defined
8040 && fdh->elf.root.type != bfd_link_hash_defweak)
8041 fdh = NULL;
8042 }
8043 }
8044
8045 skip = (sym_sec->owner != ibfd
8046 || sym_sec->output_section == bfd_abs_section_ptr);
8047 if (skip)
8048 {
8049 if (fdh != NULL && sym_sec->owner == ibfd)
8050 {
8051 /* Arrange for the function descriptor sym
8052 to be dropped. */
8053 fdh->elf.root.u.def.value = 0;
8054 fdh->elf.root.u.def.section = sym_sec;
8055 }
8056 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8057
8058 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8059 rel = next_rel;
8060 else
8061 while (1)
8062 {
8063 if (!dec_dynrel_count (rel->r_info, sec, info,
8064 NULL, h, sym))
8065 goto error_ret;
8066
8067 if (++rel == next_rel)
8068 break;
8069
8070 r_symndx = ELF64_R_SYM (rel->r_info);
8071 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8072 r_symndx, ibfd))
8073 goto error_ret;
8074 }
8075 }
8076 else
8077 {
8078 /* We'll be keeping this opd entry. */
8079 long adjust;
8080
8081 if (fdh != NULL)
8082 {
8083 /* Redefine the function descriptor symbol to
8084 this location in the opd section. It is
8085 necessary to update the value here rather
8086 than using an array of adjustments as we do
8087 for local symbols, because various places
8088 in the generic ELF code use the value
8089 stored in u.def.value. */
8090 fdh->elf.root.u.def.value = wptr - new_contents;
8091 fdh->adjust_done = 1;
8092 }
8093
8094 /* Local syms are a bit tricky. We could
8095 tweak them as they can be cached, but
8096 we'd need to look through the local syms
8097 for the function descriptor sym which we
8098 don't have at the moment. So keep an
8099 array of adjustments. */
8100 adjust = (wptr - new_contents) - (rptr - sec->contents);
8101 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8102
8103 if (wptr != rptr)
8104 memcpy (wptr, rptr, opd_ent_size);
8105 wptr += opd_ent_size;
8106 if (add_aux_fields && opd_ent_size == 16)
8107 {
8108 memset (wptr, '\0', 8);
8109 wptr += 8;
8110 }
8111
8112 /* We need to adjust any reloc offsets to point to the
8113 new opd entries. */
8114 for ( ; rel != next_rel; ++rel)
8115 {
8116 rel->r_offset += adjust;
8117 if (write_rel != rel)
8118 memcpy (write_rel, rel, sizeof (*rel));
8119 ++write_rel;
8120 }
8121 }
8122
8123 rptr += opd_ent_size;
8124 }
8125
8126 sec->size = wptr - new_contents;
8127 sec->reloc_count = write_rel - relstart;
8128 if (add_aux_fields)
8129 {
8130 free (sec->contents);
8131 sec->contents = new_contents;
8132 }
8133
8134 /* Fudge the header size too, as this is used later in
8135 elf_bfd_final_link if we are emitting relocs. */
8136 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8137 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8138 some_edited = TRUE;
8139 }
8140 else if (elf_section_data (sec)->relocs != relstart)
8141 free (relstart);
8142
8143 if (local_syms != NULL
8144 && symtab_hdr->contents != (unsigned char *) local_syms)
8145 {
8146 if (!info->keep_memory)
8147 free (local_syms);
8148 else
8149 symtab_hdr->contents = (unsigned char *) local_syms;
8150 }
8151 }
8152
8153 if (some_edited)
8154 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8155
8156 /* If we are doing a final link and the last .opd entry is just 16 byte
8157 long, add a 8 byte padding after it. */
8158 if (need_pad != NULL && !bfd_link_relocatable (info))
8159 {
8160 bfd_byte *p;
8161
8162 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8163 {
8164 BFD_ASSERT (need_pad->size > 0);
8165
8166 p = bfd_malloc (need_pad->size + 8);
8167 if (p == NULL)
8168 return FALSE;
8169
8170 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8171 p, 0, need_pad->size))
8172 return FALSE;
8173
8174 need_pad->contents = p;
8175 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8176 }
8177 else
8178 {
8179 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8180 if (p == NULL)
8181 return FALSE;
8182
8183 need_pad->contents = p;
8184 }
8185
8186 memset (need_pad->contents + need_pad->size, 0, 8);
8187 need_pad->size += 8;
8188 }
8189
8190 return TRUE;
8191 }
8192
8193 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8194
8195 asection *
8196 ppc64_elf_tls_setup (struct bfd_link_info *info)
8197 {
8198 struct ppc_link_hash_table *htab;
8199
8200 htab = ppc_hash_table (info);
8201 if (htab == NULL)
8202 return NULL;
8203
8204 if (abiversion (info->output_bfd) == 1)
8205 htab->opd_abi = 1;
8206
8207 if (htab->params->no_multi_toc)
8208 htab->do_multi_toc = 0;
8209 else if (!htab->do_multi_toc)
8210 htab->params->no_multi_toc = 1;
8211
8212 /* Default to --no-plt-localentry, as this option can cause problems
8213 with symbol interposition. For example, glibc libpthread.so and
8214 libc.so duplicate many pthread symbols, with a fallback
8215 implementation in libc.so. In some cases the fallback does more
8216 work than the pthread implementation. __pthread_condattr_destroy
8217 is one such symbol: the libpthread.so implementation is
8218 localentry:0 while the libc.so implementation is localentry:8.
8219 An app that "cleverly" uses dlopen to only load necessary
8220 libraries at runtime may omit loading libpthread.so when not
8221 running multi-threaded, which then results in the libc.so
8222 fallback symbols being used and ld.so complaining. Now there
8223 are workarounds in ld (see non_zero_localentry) to detect the
8224 pthread situation, but that may not be the only case where
8225 --plt-localentry can cause trouble. */
8226 if (htab->params->plt_localentry0 < 0)
8227 htab->params->plt_localentry0 = 0;
8228 if (htab->params->plt_localentry0
8229 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8230 FALSE, FALSE, FALSE) == NULL)
8231 _bfd_error_handler
8232 (_("warning: --plt-localentry is especially dangerous without "
8233 "ld.so support to detect ABI violations"));
8234
8235 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8236 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8237 FALSE, FALSE, TRUE));
8238 /* Move dynamic linking info to the function descriptor sym. */
8239 if (htab->tls_get_addr != NULL)
8240 func_desc_adjust (&htab->tls_get_addr->elf, info);
8241 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8242 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8243 FALSE, FALSE, TRUE));
8244 if (htab->params->tls_get_addr_opt)
8245 {
8246 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8247
8248 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8249 FALSE, FALSE, TRUE);
8250 if (opt != NULL)
8251 func_desc_adjust (opt, info);
8252 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8253 FALSE, FALSE, TRUE);
8254 if (opt_fd != NULL
8255 && (opt_fd->root.type == bfd_link_hash_defined
8256 || opt_fd->root.type == bfd_link_hash_defweak))
8257 {
8258 /* If glibc supports an optimized __tls_get_addr call stub,
8259 signalled by the presence of __tls_get_addr_opt, and we'll
8260 be calling __tls_get_addr via a plt call stub, then
8261 make __tls_get_addr point to __tls_get_addr_opt. */
8262 tga_fd = &htab->tls_get_addr_fd->elf;
8263 if (htab->elf.dynamic_sections_created
8264 && tga_fd != NULL
8265 && (tga_fd->type == STT_FUNC
8266 || tga_fd->needs_plt)
8267 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8268 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8269 {
8270 struct plt_entry *ent;
8271
8272 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8273 if (ent->plt.refcount > 0)
8274 break;
8275 if (ent != NULL)
8276 {
8277 tga_fd->root.type = bfd_link_hash_indirect;
8278 tga_fd->root.u.i.link = &opt_fd->root;
8279 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8280 opt_fd->mark = 1;
8281 if (opt_fd->dynindx != -1)
8282 {
8283 /* Use __tls_get_addr_opt in dynamic relocations. */
8284 opt_fd->dynindx = -1;
8285 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8286 opt_fd->dynstr_index);
8287 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8288 return NULL;
8289 }
8290 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8291 tga = &htab->tls_get_addr->elf;
8292 if (opt != NULL && tga != NULL)
8293 {
8294 tga->root.type = bfd_link_hash_indirect;
8295 tga->root.u.i.link = &opt->root;
8296 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8297 opt->mark = 1;
8298 _bfd_elf_link_hash_hide_symbol (info, opt,
8299 tga->forced_local);
8300 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8301 }
8302 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8303 htab->tls_get_addr_fd->is_func_descriptor = 1;
8304 if (htab->tls_get_addr != NULL)
8305 {
8306 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8307 htab->tls_get_addr->is_func = 1;
8308 }
8309 }
8310 }
8311 }
8312 else if (htab->params->tls_get_addr_opt < 0)
8313 htab->params->tls_get_addr_opt = 0;
8314 }
8315 return _bfd_elf_tls_setup (info->output_bfd, info);
8316 }
8317
8318 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8319 HASH1 or HASH2. */
8320
8321 static bfd_boolean
8322 branch_reloc_hash_match (const bfd *ibfd,
8323 const Elf_Internal_Rela *rel,
8324 const struct ppc_link_hash_entry *hash1,
8325 const struct ppc_link_hash_entry *hash2)
8326 {
8327 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8328 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8329 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8330
8331 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8332 {
8333 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8334 struct elf_link_hash_entry *h;
8335
8336 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8337 h = elf_follow_link (h);
8338 if (h == &hash1->elf || h == &hash2->elf)
8339 return TRUE;
8340 }
8341 return FALSE;
8342 }
8343
8344 /* Run through all the TLS relocs looking for optimization
8345 opportunities. The linker has been hacked (see ppc64elf.em) to do
8346 a preliminary section layout so that we know the TLS segment
8347 offsets. We can't optimize earlier because some optimizations need
8348 to know the tp offset, and we need to optimize before allocating
8349 dynamic relocations. */
8350
8351 bfd_boolean
8352 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8353 {
8354 bfd *ibfd;
8355 asection *sec;
8356 struct ppc_link_hash_table *htab;
8357 unsigned char *toc_ref;
8358 int pass;
8359
8360 if (!bfd_link_executable (info))
8361 return TRUE;
8362
8363 htab = ppc_hash_table (info);
8364 if (htab == NULL)
8365 return FALSE;
8366
8367 /* Make two passes over the relocs. On the first pass, mark toc
8368 entries involved with tls relocs, and check that tls relocs
8369 involved in setting up a tls_get_addr call are indeed followed by
8370 such a call. If they are not, we can't do any tls optimization.
8371 On the second pass twiddle tls_mask flags to notify
8372 relocate_section that optimization can be done, and adjust got
8373 and plt refcounts. */
8374 toc_ref = NULL;
8375 for (pass = 0; pass < 2; ++pass)
8376 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8377 {
8378 Elf_Internal_Sym *locsyms = NULL;
8379 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8380
8381 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8382 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8383 {
8384 Elf_Internal_Rela *relstart, *rel, *relend;
8385 bfd_boolean found_tls_get_addr_arg = 0;
8386
8387 /* Read the relocations. */
8388 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8389 info->keep_memory);
8390 if (relstart == NULL)
8391 {
8392 free (toc_ref);
8393 return FALSE;
8394 }
8395
8396 relend = relstart + sec->reloc_count;
8397 for (rel = relstart; rel < relend; rel++)
8398 {
8399 enum elf_ppc64_reloc_type r_type;
8400 unsigned long r_symndx;
8401 struct elf_link_hash_entry *h;
8402 Elf_Internal_Sym *sym;
8403 asection *sym_sec;
8404 unsigned char *tls_mask;
8405 unsigned char tls_set, tls_clear, tls_type = 0;
8406 bfd_vma value;
8407 bfd_boolean ok_tprel, is_local;
8408 long toc_ref_index = 0;
8409 int expecting_tls_get_addr = 0;
8410 bfd_boolean ret = FALSE;
8411
8412 r_symndx = ELF64_R_SYM (rel->r_info);
8413 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8414 r_symndx, ibfd))
8415 {
8416 err_free_rel:
8417 if (elf_section_data (sec)->relocs != relstart)
8418 free (relstart);
8419 if (toc_ref != NULL)
8420 free (toc_ref);
8421 if (locsyms != NULL
8422 && (elf_symtab_hdr (ibfd).contents
8423 != (unsigned char *) locsyms))
8424 free (locsyms);
8425 return ret;
8426 }
8427
8428 if (h != NULL)
8429 {
8430 if (h->root.type == bfd_link_hash_defined
8431 || h->root.type == bfd_link_hash_defweak)
8432 value = h->root.u.def.value;
8433 else if (h->root.type == bfd_link_hash_undefweak)
8434 value = 0;
8435 else
8436 {
8437 found_tls_get_addr_arg = 0;
8438 continue;
8439 }
8440 }
8441 else
8442 /* Symbols referenced by TLS relocs must be of type
8443 STT_TLS. So no need for .opd local sym adjust. */
8444 value = sym->st_value;
8445
8446 ok_tprel = FALSE;
8447 is_local = FALSE;
8448 if (h == NULL
8449 || !h->def_dynamic)
8450 {
8451 is_local = TRUE;
8452 if (h != NULL
8453 && h->root.type == bfd_link_hash_undefweak)
8454 ok_tprel = TRUE;
8455 else if (sym_sec != NULL
8456 && sym_sec->output_section != NULL)
8457 {
8458 value += sym_sec->output_offset;
8459 value += sym_sec->output_section->vma;
8460 value -= htab->elf.tls_sec->vma;
8461 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8462 < (bfd_vma) 1 << 32);
8463 }
8464 }
8465
8466 r_type = ELF64_R_TYPE (rel->r_info);
8467 /* If this section has old-style __tls_get_addr calls
8468 without marker relocs, then check that each
8469 __tls_get_addr call reloc is preceded by a reloc
8470 that conceivably belongs to the __tls_get_addr arg
8471 setup insn. If we don't find matching arg setup
8472 relocs, don't do any tls optimization. */
8473 if (pass == 0
8474 && sec->has_tls_get_addr_call
8475 && h != NULL
8476 && (h == &htab->tls_get_addr->elf
8477 || h == &htab->tls_get_addr_fd->elf)
8478 && !found_tls_get_addr_arg
8479 && is_branch_reloc (r_type))
8480 {
8481 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8482 "TLS optimization disabled\n"),
8483 ibfd, sec, rel->r_offset);
8484 ret = TRUE;
8485 goto err_free_rel;
8486 }
8487
8488 found_tls_get_addr_arg = 0;
8489 switch (r_type)
8490 {
8491 case R_PPC64_GOT_TLSLD16:
8492 case R_PPC64_GOT_TLSLD16_LO:
8493 expecting_tls_get_addr = 1;
8494 found_tls_get_addr_arg = 1;
8495 /* Fall through. */
8496
8497 case R_PPC64_GOT_TLSLD16_HI:
8498 case R_PPC64_GOT_TLSLD16_HA:
8499 /* These relocs should never be against a symbol
8500 defined in a shared lib. Leave them alone if
8501 that turns out to be the case. */
8502 if (!is_local)
8503 continue;
8504
8505 /* LD -> LE */
8506 tls_set = 0;
8507 tls_clear = TLS_LD;
8508 tls_type = TLS_TLS | TLS_LD;
8509 break;
8510
8511 case R_PPC64_GOT_TLSGD16:
8512 case R_PPC64_GOT_TLSGD16_LO:
8513 expecting_tls_get_addr = 1;
8514 found_tls_get_addr_arg = 1;
8515 /* Fall through. */
8516
8517 case R_PPC64_GOT_TLSGD16_HI:
8518 case R_PPC64_GOT_TLSGD16_HA:
8519 if (ok_tprel)
8520 /* GD -> LE */
8521 tls_set = 0;
8522 else
8523 /* GD -> IE */
8524 tls_set = TLS_TLS | TLS_TPRELGD;
8525 tls_clear = TLS_GD;
8526 tls_type = TLS_TLS | TLS_GD;
8527 break;
8528
8529 case R_PPC64_GOT_TPREL16_DS:
8530 case R_PPC64_GOT_TPREL16_LO_DS:
8531 case R_PPC64_GOT_TPREL16_HI:
8532 case R_PPC64_GOT_TPREL16_HA:
8533 if (ok_tprel)
8534 {
8535 /* IE -> LE */
8536 tls_set = 0;
8537 tls_clear = TLS_TPREL;
8538 tls_type = TLS_TLS | TLS_TPREL;
8539 break;
8540 }
8541 continue;
8542
8543 case R_PPC64_TLSGD:
8544 case R_PPC64_TLSLD:
8545 found_tls_get_addr_arg = 1;
8546 /* Fall through. */
8547
8548 case R_PPC64_TLS:
8549 case R_PPC64_TOC16:
8550 case R_PPC64_TOC16_LO:
8551 if (sym_sec == NULL || sym_sec != toc)
8552 continue;
8553
8554 /* Mark this toc entry as referenced by a TLS
8555 code sequence. We can do that now in the
8556 case of R_PPC64_TLS, and after checking for
8557 tls_get_addr for the TOC16 relocs. */
8558 if (toc_ref == NULL)
8559 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8560 if (toc_ref == NULL)
8561 goto err_free_rel;
8562
8563 if (h != NULL)
8564 value = h->root.u.def.value;
8565 else
8566 value = sym->st_value;
8567 value += rel->r_addend;
8568 if (value % 8 != 0)
8569 continue;
8570 BFD_ASSERT (value < toc->size
8571 && toc->output_offset % 8 == 0);
8572 toc_ref_index = (value + toc->output_offset) / 8;
8573 if (r_type == R_PPC64_TLS
8574 || r_type == R_PPC64_TLSGD
8575 || r_type == R_PPC64_TLSLD)
8576 {
8577 toc_ref[toc_ref_index] = 1;
8578 continue;
8579 }
8580
8581 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8582 continue;
8583
8584 tls_set = 0;
8585 tls_clear = 0;
8586 expecting_tls_get_addr = 2;
8587 break;
8588
8589 case R_PPC64_TPREL64:
8590 if (pass == 0
8591 || sec != toc
8592 || toc_ref == NULL
8593 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8594 continue;
8595 if (ok_tprel)
8596 {
8597 /* IE -> LE */
8598 tls_set = TLS_EXPLICIT;
8599 tls_clear = TLS_TPREL;
8600 break;
8601 }
8602 continue;
8603
8604 case R_PPC64_DTPMOD64:
8605 if (pass == 0
8606 || sec != toc
8607 || toc_ref == NULL
8608 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8609 continue;
8610 if (rel + 1 < relend
8611 && (rel[1].r_info
8612 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8613 && rel[1].r_offset == rel->r_offset + 8)
8614 {
8615 if (ok_tprel)
8616 /* GD -> LE */
8617 tls_set = TLS_EXPLICIT | TLS_GD;
8618 else
8619 /* GD -> IE */
8620 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8621 tls_clear = TLS_GD;
8622 }
8623 else
8624 {
8625 if (!is_local)
8626 continue;
8627
8628 /* LD -> LE */
8629 tls_set = TLS_EXPLICIT;
8630 tls_clear = TLS_LD;
8631 }
8632 break;
8633
8634 default:
8635 continue;
8636 }
8637
8638 if (pass == 0)
8639 {
8640 if (!expecting_tls_get_addr
8641 || !sec->has_tls_get_addr_call)
8642 continue;
8643
8644 if (rel + 1 < relend
8645 && branch_reloc_hash_match (ibfd, rel + 1,
8646 htab->tls_get_addr,
8647 htab->tls_get_addr_fd))
8648 {
8649 if (expecting_tls_get_addr == 2)
8650 {
8651 /* Check for toc tls entries. */
8652 unsigned char *toc_tls;
8653 int retval;
8654
8655 retval = get_tls_mask (&toc_tls, NULL, NULL,
8656 &locsyms,
8657 rel, ibfd);
8658 if (retval == 0)
8659 goto err_free_rel;
8660 if (toc_tls != NULL)
8661 {
8662 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8663 found_tls_get_addr_arg = 1;
8664 if (retval > 1)
8665 toc_ref[toc_ref_index] = 1;
8666 }
8667 }
8668 continue;
8669 }
8670
8671 if (expecting_tls_get_addr != 1)
8672 continue;
8673
8674 /* Uh oh, we didn't find the expected call. We
8675 could just mark this symbol to exclude it
8676 from tls optimization but it's safer to skip
8677 the entire optimization. */
8678 /* xgettext:c-format */
8679 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8680 "TLS optimization disabled\n"),
8681 ibfd, sec, rel->r_offset);
8682 ret = TRUE;
8683 goto err_free_rel;
8684 }
8685
8686 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8687 {
8688 struct plt_entry *ent;
8689 for (ent = htab->tls_get_addr->elf.plt.plist;
8690 ent != NULL;
8691 ent = ent->next)
8692 if (ent->addend == 0)
8693 {
8694 if (ent->plt.refcount > 0)
8695 {
8696 ent->plt.refcount -= 1;
8697 expecting_tls_get_addr = 0;
8698 }
8699 break;
8700 }
8701 }
8702
8703 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8704 {
8705 struct plt_entry *ent;
8706 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8707 ent != NULL;
8708 ent = ent->next)
8709 if (ent->addend == 0)
8710 {
8711 if (ent->plt.refcount > 0)
8712 ent->plt.refcount -= 1;
8713 break;
8714 }
8715 }
8716
8717 if (tls_clear == 0)
8718 continue;
8719
8720 if ((tls_set & TLS_EXPLICIT) == 0)
8721 {
8722 struct got_entry *ent;
8723
8724 /* Adjust got entry for this reloc. */
8725 if (h != NULL)
8726 ent = h->got.glist;
8727 else
8728 ent = elf_local_got_ents (ibfd)[r_symndx];
8729
8730 for (; ent != NULL; ent = ent->next)
8731 if (ent->addend == rel->r_addend
8732 && ent->owner == ibfd
8733 && ent->tls_type == tls_type)
8734 break;
8735 if (ent == NULL)
8736 abort ();
8737
8738 if (tls_set == 0)
8739 {
8740 /* We managed to get rid of a got entry. */
8741 if (ent->got.refcount > 0)
8742 ent->got.refcount -= 1;
8743 }
8744 }
8745 else
8746 {
8747 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8748 we'll lose one or two dyn relocs. */
8749 if (!dec_dynrel_count (rel->r_info, sec, info,
8750 NULL, h, sym))
8751 return FALSE;
8752
8753 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8754 {
8755 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8756 NULL, h, sym))
8757 return FALSE;
8758 }
8759 }
8760
8761 *tls_mask |= tls_set;
8762 *tls_mask &= ~tls_clear;
8763 }
8764
8765 if (elf_section_data (sec)->relocs != relstart)
8766 free (relstart);
8767 }
8768
8769 if (locsyms != NULL
8770 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8771 {
8772 if (!info->keep_memory)
8773 free (locsyms);
8774 else
8775 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8776 }
8777 }
8778
8779 if (toc_ref != NULL)
8780 free (toc_ref);
8781 htab->do_tls_opt = 1;
8782 return TRUE;
8783 }
8784
8785 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8786 the values of any global symbols in a toc section that has been
8787 edited. Globals in toc sections should be a rarity, so this function
8788 sets a flag if any are found in toc sections other than the one just
8789 edited, so that further hash table traversals can be avoided. */
8790
8791 struct adjust_toc_info
8792 {
8793 asection *toc;
8794 unsigned long *skip;
8795 bfd_boolean global_toc_syms;
8796 };
8797
8798 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8799
8800 static bfd_boolean
8801 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8802 {
8803 struct ppc_link_hash_entry *eh;
8804 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8805 unsigned long i;
8806
8807 if (h->root.type != bfd_link_hash_defined
8808 && h->root.type != bfd_link_hash_defweak)
8809 return TRUE;
8810
8811 eh = (struct ppc_link_hash_entry *) h;
8812 if (eh->adjust_done)
8813 return TRUE;
8814
8815 if (eh->elf.root.u.def.section == toc_inf->toc)
8816 {
8817 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8818 i = toc_inf->toc->rawsize >> 3;
8819 else
8820 i = eh->elf.root.u.def.value >> 3;
8821
8822 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8823 {
8824 _bfd_error_handler
8825 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8826 do
8827 ++i;
8828 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8829 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8830 }
8831
8832 eh->elf.root.u.def.value -= toc_inf->skip[i];
8833 eh->adjust_done = 1;
8834 }
8835 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8836 toc_inf->global_toc_syms = TRUE;
8837
8838 return TRUE;
8839 }
8840
8841 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8842 on a _LO variety toc/got reloc. */
8843
8844 static bfd_boolean
8845 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8846 {
8847 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8848 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8849 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8850 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8851 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8852 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8853 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8854 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8855 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8856 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8857 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8858 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8859 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8860 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8861 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8862 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8863 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8864 /* Exclude lfqu by testing reloc. If relocs are ever
8865 defined for the reduced D field in psq_lu then those
8866 will need testing too. */
8867 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8868 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8869 && (insn & 1) == 0)
8870 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8871 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8872 /* Exclude stfqu. psq_stu as above for psq_lu. */
8873 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8874 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8875 && (insn & 1) == 0));
8876 }
8877
8878 /* Examine all relocs referencing .toc sections in order to remove
8879 unused .toc entries. */
8880
8881 bfd_boolean
8882 ppc64_elf_edit_toc (struct bfd_link_info *info)
8883 {
8884 bfd *ibfd;
8885 struct adjust_toc_info toc_inf;
8886 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8887
8888 htab->do_toc_opt = 1;
8889 toc_inf.global_toc_syms = TRUE;
8890 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8891 {
8892 asection *toc, *sec;
8893 Elf_Internal_Shdr *symtab_hdr;
8894 Elf_Internal_Sym *local_syms;
8895 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8896 unsigned long *skip, *drop;
8897 unsigned char *used;
8898 unsigned char *keep, last, some_unused;
8899
8900 if (!is_ppc64_elf (ibfd))
8901 continue;
8902
8903 toc = bfd_get_section_by_name (ibfd, ".toc");
8904 if (toc == NULL
8905 || toc->size == 0
8906 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8907 || discarded_section (toc))
8908 continue;
8909
8910 toc_relocs = NULL;
8911 local_syms = NULL;
8912 symtab_hdr = &elf_symtab_hdr (ibfd);
8913
8914 /* Look at sections dropped from the final link. */
8915 skip = NULL;
8916 relstart = NULL;
8917 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8918 {
8919 if (sec->reloc_count == 0
8920 || !discarded_section (sec)
8921 || get_opd_info (sec)
8922 || (sec->flags & SEC_ALLOC) == 0
8923 || (sec->flags & SEC_DEBUGGING) != 0)
8924 continue;
8925
8926 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8927 if (relstart == NULL)
8928 goto error_ret;
8929
8930 /* Run through the relocs to see which toc entries might be
8931 unused. */
8932 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8933 {
8934 enum elf_ppc64_reloc_type r_type;
8935 unsigned long r_symndx;
8936 asection *sym_sec;
8937 struct elf_link_hash_entry *h;
8938 Elf_Internal_Sym *sym;
8939 bfd_vma val;
8940
8941 r_type = ELF64_R_TYPE (rel->r_info);
8942 switch (r_type)
8943 {
8944 default:
8945 continue;
8946
8947 case R_PPC64_TOC16:
8948 case R_PPC64_TOC16_LO:
8949 case R_PPC64_TOC16_HI:
8950 case R_PPC64_TOC16_HA:
8951 case R_PPC64_TOC16_DS:
8952 case R_PPC64_TOC16_LO_DS:
8953 break;
8954 }
8955
8956 r_symndx = ELF64_R_SYM (rel->r_info);
8957 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8958 r_symndx, ibfd))
8959 goto error_ret;
8960
8961 if (sym_sec != toc)
8962 continue;
8963
8964 if (h != NULL)
8965 val = h->root.u.def.value;
8966 else
8967 val = sym->st_value;
8968 val += rel->r_addend;
8969
8970 if (val >= toc->size)
8971 continue;
8972
8973 /* Anything in the toc ought to be aligned to 8 bytes.
8974 If not, don't mark as unused. */
8975 if (val & 7)
8976 continue;
8977
8978 if (skip == NULL)
8979 {
8980 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8981 if (skip == NULL)
8982 goto error_ret;
8983 }
8984
8985 skip[val >> 3] = ref_from_discarded;
8986 }
8987
8988 if (elf_section_data (sec)->relocs != relstart)
8989 free (relstart);
8990 }
8991
8992 /* For largetoc loads of address constants, we can convert
8993 . addis rx,2,addr@got@ha
8994 . ld ry,addr@got@l(rx)
8995 to
8996 . addis rx,2,addr@toc@ha
8997 . addi ry,rx,addr@toc@l
8998 when addr is within 2G of the toc pointer. This then means
8999 that the word storing "addr" in the toc is no longer needed. */
9000
9001 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9002 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9003 && toc->reloc_count != 0)
9004 {
9005 /* Read toc relocs. */
9006 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9007 info->keep_memory);
9008 if (toc_relocs == NULL)
9009 goto error_ret;
9010
9011 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9012 {
9013 enum elf_ppc64_reloc_type r_type;
9014 unsigned long r_symndx;
9015 asection *sym_sec;
9016 struct elf_link_hash_entry *h;
9017 Elf_Internal_Sym *sym;
9018 bfd_vma val, addr;
9019
9020 r_type = ELF64_R_TYPE (rel->r_info);
9021 if (r_type != R_PPC64_ADDR64)
9022 continue;
9023
9024 r_symndx = ELF64_R_SYM (rel->r_info);
9025 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9026 r_symndx, ibfd))
9027 goto error_ret;
9028
9029 if (sym_sec == NULL
9030 || sym_sec->output_section == NULL
9031 || discarded_section (sym_sec))
9032 continue;
9033
9034 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9035 continue;
9036
9037 if (h != NULL)
9038 {
9039 if (h->type == STT_GNU_IFUNC)
9040 continue;
9041 val = h->root.u.def.value;
9042 }
9043 else
9044 {
9045 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9046 continue;
9047 val = sym->st_value;
9048 }
9049 val += rel->r_addend;
9050 val += sym_sec->output_section->vma + sym_sec->output_offset;
9051
9052 /* We don't yet know the exact toc pointer value, but we
9053 know it will be somewhere in the toc section. Don't
9054 optimize if the difference from any possible toc
9055 pointer is outside [ff..f80008000, 7fff7fff]. */
9056 addr = toc->output_section->vma + TOC_BASE_OFF;
9057 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9058 continue;
9059
9060 addr = toc->output_section->vma + toc->output_section->rawsize;
9061 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9062 continue;
9063
9064 if (skip == NULL)
9065 {
9066 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9067 if (skip == NULL)
9068 goto error_ret;
9069 }
9070
9071 skip[rel->r_offset >> 3]
9072 |= can_optimize | ((rel - toc_relocs) << 2);
9073 }
9074 }
9075
9076 if (skip == NULL)
9077 continue;
9078
9079 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9080 if (used == NULL)
9081 {
9082 error_ret:
9083 if (local_syms != NULL
9084 && symtab_hdr->contents != (unsigned char *) local_syms)
9085 free (local_syms);
9086 if (sec != NULL
9087 && relstart != NULL
9088 && elf_section_data (sec)->relocs != relstart)
9089 free (relstart);
9090 if (toc_relocs != NULL
9091 && elf_section_data (toc)->relocs != toc_relocs)
9092 free (toc_relocs);
9093 if (skip != NULL)
9094 free (skip);
9095 return FALSE;
9096 }
9097
9098 /* Now check all kept sections that might reference the toc.
9099 Check the toc itself last. */
9100 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9101 : ibfd->sections);
9102 sec != NULL;
9103 sec = (sec == toc ? NULL
9104 : sec->next == NULL ? toc
9105 : sec->next == toc && toc->next ? toc->next
9106 : sec->next))
9107 {
9108 int repeat;
9109
9110 if (sec->reloc_count == 0
9111 || discarded_section (sec)
9112 || get_opd_info (sec)
9113 || (sec->flags & SEC_ALLOC) == 0
9114 || (sec->flags & SEC_DEBUGGING) != 0)
9115 continue;
9116
9117 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9118 info->keep_memory);
9119 if (relstart == NULL)
9120 {
9121 free (used);
9122 goto error_ret;
9123 }
9124
9125 /* Mark toc entries referenced as used. */
9126 do
9127 {
9128 repeat = 0;
9129 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9130 {
9131 enum elf_ppc64_reloc_type r_type;
9132 unsigned long r_symndx;
9133 asection *sym_sec;
9134 struct elf_link_hash_entry *h;
9135 Elf_Internal_Sym *sym;
9136 bfd_vma val;
9137 enum {no_check, check_lo, check_ha} insn_check;
9138
9139 r_type = ELF64_R_TYPE (rel->r_info);
9140 switch (r_type)
9141 {
9142 default:
9143 insn_check = no_check;
9144 break;
9145
9146 case R_PPC64_GOT_TLSLD16_HA:
9147 case R_PPC64_GOT_TLSGD16_HA:
9148 case R_PPC64_GOT_TPREL16_HA:
9149 case R_PPC64_GOT_DTPREL16_HA:
9150 case R_PPC64_GOT16_HA:
9151 case R_PPC64_TOC16_HA:
9152 insn_check = check_ha;
9153 break;
9154
9155 case R_PPC64_GOT_TLSLD16_LO:
9156 case R_PPC64_GOT_TLSGD16_LO:
9157 case R_PPC64_GOT_TPREL16_LO_DS:
9158 case R_PPC64_GOT_DTPREL16_LO_DS:
9159 case R_PPC64_GOT16_LO:
9160 case R_PPC64_GOT16_LO_DS:
9161 case R_PPC64_TOC16_LO:
9162 case R_PPC64_TOC16_LO_DS:
9163 insn_check = check_lo;
9164 break;
9165 }
9166
9167 if (insn_check != no_check)
9168 {
9169 bfd_vma off = rel->r_offset & ~3;
9170 unsigned char buf[4];
9171 unsigned int insn;
9172
9173 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9174 {
9175 free (used);
9176 goto error_ret;
9177 }
9178 insn = bfd_get_32 (ibfd, buf);
9179 if (insn_check == check_lo
9180 ? !ok_lo_toc_insn (insn, r_type)
9181 : ((insn & ((0x3f << 26) | 0x1f << 16))
9182 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9183 {
9184 char str[12];
9185
9186 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9187 sprintf (str, "%#08x", insn);
9188 info->callbacks->einfo
9189 /* xgettext:c-format */
9190 (_("%H: toc optimization is not supported for"
9191 " %s instruction\n"),
9192 ibfd, sec, rel->r_offset & ~3, str);
9193 }
9194 }
9195
9196 switch (r_type)
9197 {
9198 case R_PPC64_TOC16:
9199 case R_PPC64_TOC16_LO:
9200 case R_PPC64_TOC16_HI:
9201 case R_PPC64_TOC16_HA:
9202 case R_PPC64_TOC16_DS:
9203 case R_PPC64_TOC16_LO_DS:
9204 /* In case we're taking addresses of toc entries. */
9205 case R_PPC64_ADDR64:
9206 break;
9207
9208 default:
9209 continue;
9210 }
9211
9212 r_symndx = ELF64_R_SYM (rel->r_info);
9213 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9214 r_symndx, ibfd))
9215 {
9216 free (used);
9217 goto error_ret;
9218 }
9219
9220 if (sym_sec != toc)
9221 continue;
9222
9223 if (h != NULL)
9224 val = h->root.u.def.value;
9225 else
9226 val = sym->st_value;
9227 val += rel->r_addend;
9228
9229 if (val >= toc->size)
9230 continue;
9231
9232 if ((skip[val >> 3] & can_optimize) != 0)
9233 {
9234 bfd_vma off;
9235 unsigned char opc;
9236
9237 switch (r_type)
9238 {
9239 case R_PPC64_TOC16_HA:
9240 break;
9241
9242 case R_PPC64_TOC16_LO_DS:
9243 off = rel->r_offset;
9244 off += (bfd_big_endian (ibfd) ? -2 : 3);
9245 if (!bfd_get_section_contents (ibfd, sec, &opc,
9246 off, 1))
9247 {
9248 free (used);
9249 goto error_ret;
9250 }
9251 if ((opc & (0x3f << 2)) == (58u << 2))
9252 break;
9253 /* Fall through. */
9254
9255 default:
9256 /* Wrong sort of reloc, or not a ld. We may
9257 as well clear ref_from_discarded too. */
9258 skip[val >> 3] = 0;
9259 }
9260 }
9261
9262 if (sec != toc)
9263 used[val >> 3] = 1;
9264 /* For the toc section, we only mark as used if this
9265 entry itself isn't unused. */
9266 else if ((used[rel->r_offset >> 3]
9267 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9268 && !used[val >> 3])
9269 {
9270 /* Do all the relocs again, to catch reference
9271 chains. */
9272 repeat = 1;
9273 used[val >> 3] = 1;
9274 }
9275 }
9276 }
9277 while (repeat);
9278
9279 if (elf_section_data (sec)->relocs != relstart)
9280 free (relstart);
9281 }
9282
9283 /* Merge the used and skip arrays. Assume that TOC
9284 doublewords not appearing as either used or unused belong
9285 to an entry more than one doubleword in size. */
9286 for (drop = skip, keep = used, last = 0, some_unused = 0;
9287 drop < skip + (toc->size + 7) / 8;
9288 ++drop, ++keep)
9289 {
9290 if (*keep)
9291 {
9292 *drop &= ~ref_from_discarded;
9293 if ((*drop & can_optimize) != 0)
9294 some_unused = 1;
9295 last = 0;
9296 }
9297 else if ((*drop & ref_from_discarded) != 0)
9298 {
9299 some_unused = 1;
9300 last = ref_from_discarded;
9301 }
9302 else
9303 *drop = last;
9304 }
9305
9306 free (used);
9307
9308 if (some_unused)
9309 {
9310 bfd_byte *contents, *src;
9311 unsigned long off;
9312 Elf_Internal_Sym *sym;
9313 bfd_boolean local_toc_syms = FALSE;
9314
9315 /* Shuffle the toc contents, and at the same time convert the
9316 skip array from booleans into offsets. */
9317 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9318 goto error_ret;
9319
9320 elf_section_data (toc)->this_hdr.contents = contents;
9321
9322 for (src = contents, off = 0, drop = skip;
9323 src < contents + toc->size;
9324 src += 8, ++drop)
9325 {
9326 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9327 off += 8;
9328 else if (off != 0)
9329 {
9330 *drop = off;
9331 memcpy (src - off, src, 8);
9332 }
9333 }
9334 *drop = off;
9335 toc->rawsize = toc->size;
9336 toc->size = src - contents - off;
9337
9338 /* Adjust addends for relocs against the toc section sym,
9339 and optimize any accesses we can. */
9340 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9341 {
9342 if (sec->reloc_count == 0
9343 || discarded_section (sec))
9344 continue;
9345
9346 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9347 info->keep_memory);
9348 if (relstart == NULL)
9349 goto error_ret;
9350
9351 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9352 {
9353 enum elf_ppc64_reloc_type r_type;
9354 unsigned long r_symndx;
9355 asection *sym_sec;
9356 struct elf_link_hash_entry *h;
9357 bfd_vma val;
9358
9359 r_type = ELF64_R_TYPE (rel->r_info);
9360 switch (r_type)
9361 {
9362 default:
9363 continue;
9364
9365 case R_PPC64_TOC16:
9366 case R_PPC64_TOC16_LO:
9367 case R_PPC64_TOC16_HI:
9368 case R_PPC64_TOC16_HA:
9369 case R_PPC64_TOC16_DS:
9370 case R_PPC64_TOC16_LO_DS:
9371 case R_PPC64_ADDR64:
9372 break;
9373 }
9374
9375 r_symndx = ELF64_R_SYM (rel->r_info);
9376 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9377 r_symndx, ibfd))
9378 goto error_ret;
9379
9380 if (sym_sec != toc)
9381 continue;
9382
9383 if (h != NULL)
9384 val = h->root.u.def.value;
9385 else
9386 {
9387 val = sym->st_value;
9388 if (val != 0)
9389 local_toc_syms = TRUE;
9390 }
9391
9392 val += rel->r_addend;
9393
9394 if (val > toc->rawsize)
9395 val = toc->rawsize;
9396 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9397 continue;
9398 else if ((skip[val >> 3] & can_optimize) != 0)
9399 {
9400 Elf_Internal_Rela *tocrel
9401 = toc_relocs + (skip[val >> 3] >> 2);
9402 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9403
9404 switch (r_type)
9405 {
9406 case R_PPC64_TOC16_HA:
9407 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9408 break;
9409
9410 case R_PPC64_TOC16_LO_DS:
9411 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9412 break;
9413
9414 default:
9415 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9416 ppc_howto_init ();
9417 info->callbacks->einfo
9418 /* xgettext:c-format */
9419 (_("%H: %s references "
9420 "optimized away TOC entry\n"),
9421 ibfd, sec, rel->r_offset,
9422 ppc64_elf_howto_table[r_type]->name);
9423 bfd_set_error (bfd_error_bad_value);
9424 goto error_ret;
9425 }
9426 rel->r_addend = tocrel->r_addend;
9427 elf_section_data (sec)->relocs = relstart;
9428 continue;
9429 }
9430
9431 if (h != NULL || sym->st_value != 0)
9432 continue;
9433
9434 rel->r_addend -= skip[val >> 3];
9435 elf_section_data (sec)->relocs = relstart;
9436 }
9437
9438 if (elf_section_data (sec)->relocs != relstart)
9439 free (relstart);
9440 }
9441
9442 /* We shouldn't have local or global symbols defined in the TOC,
9443 but handle them anyway. */
9444 if (local_syms != NULL)
9445 for (sym = local_syms;
9446 sym < local_syms + symtab_hdr->sh_info;
9447 ++sym)
9448 if (sym->st_value != 0
9449 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9450 {
9451 unsigned long i;
9452
9453 if (sym->st_value > toc->rawsize)
9454 i = toc->rawsize >> 3;
9455 else
9456 i = sym->st_value >> 3;
9457
9458 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9459 {
9460 if (local_toc_syms)
9461 _bfd_error_handler
9462 (_("%s defined on removed toc entry"),
9463 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9464 do
9465 ++i;
9466 while ((skip[i] & (ref_from_discarded | can_optimize)));
9467 sym->st_value = (bfd_vma) i << 3;
9468 }
9469
9470 sym->st_value -= skip[i];
9471 symtab_hdr->contents = (unsigned char *) local_syms;
9472 }
9473
9474 /* Adjust any global syms defined in this toc input section. */
9475 if (toc_inf.global_toc_syms)
9476 {
9477 toc_inf.toc = toc;
9478 toc_inf.skip = skip;
9479 toc_inf.global_toc_syms = FALSE;
9480 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9481 &toc_inf);
9482 }
9483
9484 if (toc->reloc_count != 0)
9485 {
9486 Elf_Internal_Shdr *rel_hdr;
9487 Elf_Internal_Rela *wrel;
9488 bfd_size_type sz;
9489
9490 /* Remove unused toc relocs, and adjust those we keep. */
9491 if (toc_relocs == NULL)
9492 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9493 info->keep_memory);
9494 if (toc_relocs == NULL)
9495 goto error_ret;
9496
9497 wrel = toc_relocs;
9498 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9499 if ((skip[rel->r_offset >> 3]
9500 & (ref_from_discarded | can_optimize)) == 0)
9501 {
9502 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9503 wrel->r_info = rel->r_info;
9504 wrel->r_addend = rel->r_addend;
9505 ++wrel;
9506 }
9507 else if (!dec_dynrel_count (rel->r_info, toc, info,
9508 &local_syms, NULL, NULL))
9509 goto error_ret;
9510
9511 elf_section_data (toc)->relocs = toc_relocs;
9512 toc->reloc_count = wrel - toc_relocs;
9513 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9514 sz = rel_hdr->sh_entsize;
9515 rel_hdr->sh_size = toc->reloc_count * sz;
9516 }
9517 }
9518 else if (toc_relocs != NULL
9519 && elf_section_data (toc)->relocs != toc_relocs)
9520 free (toc_relocs);
9521
9522 if (local_syms != NULL
9523 && symtab_hdr->contents != (unsigned char *) local_syms)
9524 {
9525 if (!info->keep_memory)
9526 free (local_syms);
9527 else
9528 symtab_hdr->contents = (unsigned char *) local_syms;
9529 }
9530 free (skip);
9531 }
9532
9533 return TRUE;
9534 }
9535
9536 /* Return true iff input section I references the TOC using
9537 instructions limited to +/-32k offsets. */
9538
9539 bfd_boolean
9540 ppc64_elf_has_small_toc_reloc (asection *i)
9541 {
9542 return (is_ppc64_elf (i->owner)
9543 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9544 }
9545
9546 /* Allocate space for one GOT entry. */
9547
9548 static void
9549 allocate_got (struct elf_link_hash_entry *h,
9550 struct bfd_link_info *info,
9551 struct got_entry *gent)
9552 {
9553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9554 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9555 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9556 ? 16 : 8);
9557 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9558 ? 2 : 1) * sizeof (Elf64_External_Rela);
9559 asection *got = ppc64_elf_tdata (gent->owner)->got;
9560
9561 gent->got.offset = got->size;
9562 got->size += entsize;
9563
9564 if (h->type == STT_GNU_IFUNC)
9565 {
9566 htab->elf.irelplt->size += rentsize;
9567 htab->got_reli_size += rentsize;
9568 }
9569 else if (((bfd_link_pic (info)
9570 && !((gent->tls_type & TLS_TPREL) != 0
9571 && bfd_link_executable (info)
9572 && SYMBOL_REFERENCES_LOCAL (info, h)))
9573 || (htab->elf.dynamic_sections_created
9574 && h->dynindx != -1
9575 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9576 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9577 {
9578 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9579 relgot->size += rentsize;
9580 }
9581 }
9582
9583 /* This function merges got entries in the same toc group. */
9584
9585 static void
9586 merge_got_entries (struct got_entry **pent)
9587 {
9588 struct got_entry *ent, *ent2;
9589
9590 for (ent = *pent; ent != NULL; ent = ent->next)
9591 if (!ent->is_indirect)
9592 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9593 if (!ent2->is_indirect
9594 && ent2->addend == ent->addend
9595 && ent2->tls_type == ent->tls_type
9596 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9597 {
9598 ent2->is_indirect = TRUE;
9599 ent2->got.ent = ent;
9600 }
9601 }
9602
9603 /* If H is undefined, make it dynamic if that makes sense. */
9604
9605 static bfd_boolean
9606 ensure_undef_dynamic (struct bfd_link_info *info,
9607 struct elf_link_hash_entry *h)
9608 {
9609 struct elf_link_hash_table *htab = elf_hash_table (info);
9610
9611 if (htab->dynamic_sections_created
9612 && ((info->dynamic_undefined_weak != 0
9613 && h->root.type == bfd_link_hash_undefweak)
9614 || h->root.type == bfd_link_hash_undefined)
9615 && h->dynindx == -1
9616 && !h->forced_local
9617 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9618 return bfd_elf_link_record_dynamic_symbol (info, h);
9619 return TRUE;
9620 }
9621
9622 /* Allocate space in .plt, .got and associated reloc sections for
9623 dynamic relocs. */
9624
9625 static bfd_boolean
9626 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9627 {
9628 struct bfd_link_info *info;
9629 struct ppc_link_hash_table *htab;
9630 asection *s;
9631 struct ppc_link_hash_entry *eh;
9632 struct got_entry **pgent, *gent;
9633
9634 if (h->root.type == bfd_link_hash_indirect)
9635 return TRUE;
9636
9637 info = (struct bfd_link_info *) inf;
9638 htab = ppc_hash_table (info);
9639 if (htab == NULL)
9640 return FALSE;
9641
9642 eh = (struct ppc_link_hash_entry *) h;
9643 /* Run through the TLS GD got entries first if we're changing them
9644 to TPREL. */
9645 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9646 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9647 if (gent->got.refcount > 0
9648 && (gent->tls_type & TLS_GD) != 0)
9649 {
9650 /* This was a GD entry that has been converted to TPREL. If
9651 there happens to be a TPREL entry we can use that one. */
9652 struct got_entry *ent;
9653 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9654 if (ent->got.refcount > 0
9655 && (ent->tls_type & TLS_TPREL) != 0
9656 && ent->addend == gent->addend
9657 && ent->owner == gent->owner)
9658 {
9659 gent->got.refcount = 0;
9660 break;
9661 }
9662
9663 /* If not, then we'll be using our own TPREL entry. */
9664 if (gent->got.refcount != 0)
9665 gent->tls_type = TLS_TLS | TLS_TPREL;
9666 }
9667
9668 /* Remove any list entry that won't generate a word in the GOT before
9669 we call merge_got_entries. Otherwise we risk merging to empty
9670 entries. */
9671 pgent = &h->got.glist;
9672 while ((gent = *pgent) != NULL)
9673 if (gent->got.refcount > 0)
9674 {
9675 if ((gent->tls_type & TLS_LD) != 0
9676 && !h->def_dynamic)
9677 {
9678 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9679 *pgent = gent->next;
9680 }
9681 else
9682 pgent = &gent->next;
9683 }
9684 else
9685 *pgent = gent->next;
9686
9687 if (!htab->do_multi_toc)
9688 merge_got_entries (&h->got.glist);
9689
9690 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9691 if (!gent->is_indirect)
9692 {
9693 /* Make sure this symbol is output as a dynamic symbol. */
9694 if (!ensure_undef_dynamic (info, h))
9695 return FALSE;
9696
9697 if (!is_ppc64_elf (gent->owner))
9698 abort ();
9699
9700 allocate_got (h, info, gent);
9701 }
9702
9703 /* If no dynamic sections we can't have dynamic relocs, except for
9704 IFUNCs which are handled even in static executables. */
9705 if (!htab->elf.dynamic_sections_created
9706 && h->type != STT_GNU_IFUNC)
9707 eh->dyn_relocs = NULL;
9708
9709 /* Discard relocs on undefined symbols that must be local. */
9710 else if (h->root.type == bfd_link_hash_undefined
9711 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9712 eh->dyn_relocs = NULL;
9713
9714 /* Also discard relocs on undefined weak syms with non-default
9715 visibility, or when dynamic_undefined_weak says so. */
9716 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9717 eh->dyn_relocs = NULL;
9718
9719 if (eh->dyn_relocs != NULL)
9720 {
9721 struct elf_dyn_relocs *p, **pp;
9722
9723 /* In the shared -Bsymbolic case, discard space allocated for
9724 dynamic pc-relative relocs against symbols which turn out to
9725 be defined in regular objects. For the normal shared case,
9726 discard space for relocs that have become local due to symbol
9727 visibility changes. */
9728
9729 if (bfd_link_pic (info))
9730 {
9731 /* Relocs that use pc_count are those that appear on a call
9732 insn, or certain REL relocs (see must_be_dyn_reloc) that
9733 can be generated via assembly. We want calls to
9734 protected symbols to resolve directly to the function
9735 rather than going via the plt. If people want function
9736 pointer comparisons to work as expected then they should
9737 avoid writing weird assembly. */
9738 if (SYMBOL_CALLS_LOCAL (info, h))
9739 {
9740 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9741 {
9742 p->count -= p->pc_count;
9743 p->pc_count = 0;
9744 if (p->count == 0)
9745 *pp = p->next;
9746 else
9747 pp = &p->next;
9748 }
9749 }
9750
9751 if (eh->dyn_relocs != NULL)
9752 {
9753 /* Make sure this symbol is output as a dynamic symbol. */
9754 if (!ensure_undef_dynamic (info, h))
9755 return FALSE;
9756 }
9757 }
9758 else if (ELIMINATE_COPY_RELOCS && h->type != STT_GNU_IFUNC)
9759 {
9760 /* For the non-pic case, discard space for relocs against
9761 symbols which turn out to need copy relocs or are not
9762 dynamic. */
9763 if (h->dynamic_adjusted
9764 && !h->def_regular
9765 && !ELF_COMMON_DEF_P (h))
9766 {
9767 /* Make sure this symbol is output as a dynamic symbol. */
9768 if (!ensure_undef_dynamic (info, h))
9769 return FALSE;
9770
9771 if (h->dynindx == -1)
9772 eh->dyn_relocs = NULL;
9773 }
9774 else
9775 eh->dyn_relocs = NULL;
9776 }
9777
9778 /* Finally, allocate space. */
9779 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9780 {
9781 asection *sreloc = elf_section_data (p->sec)->sreloc;
9782 if (eh->elf.type == STT_GNU_IFUNC)
9783 sreloc = htab->elf.irelplt;
9784 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9785 }
9786 }
9787
9788 if ((htab->elf.dynamic_sections_created
9789 && h->dynindx != -1)
9790 || h->type == STT_GNU_IFUNC)
9791 {
9792 struct plt_entry *pent;
9793 bfd_boolean doneone = FALSE;
9794 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9795 if (pent->plt.refcount > 0)
9796 {
9797 if (!htab->elf.dynamic_sections_created
9798 || h->dynindx == -1)
9799 {
9800 s = htab->elf.iplt;
9801 pent->plt.offset = s->size;
9802 s->size += PLT_ENTRY_SIZE (htab);
9803 s = htab->elf.irelplt;
9804 }
9805 else
9806 {
9807 /* If this is the first .plt entry, make room for the special
9808 first entry. */
9809 s = htab->elf.splt;
9810 if (s->size == 0)
9811 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9812
9813 pent->plt.offset = s->size;
9814
9815 /* Make room for this entry. */
9816 s->size += PLT_ENTRY_SIZE (htab);
9817
9818 /* Make room for the .glink code. */
9819 s = htab->glink;
9820 if (s->size == 0)
9821 s->size += GLINK_PLTRESOLVE_SIZE (htab);
9822 if (htab->opd_abi)
9823 {
9824 /* We need bigger stubs past index 32767. */
9825 if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4)
9826 s->size += 4;
9827 s->size += 2*4;
9828 }
9829 else
9830 s->size += 4;
9831
9832 /* We also need to make an entry in the .rela.plt section. */
9833 s = htab->elf.srelplt;
9834 }
9835 s->size += sizeof (Elf64_External_Rela);
9836 doneone = TRUE;
9837 }
9838 else
9839 pent->plt.offset = (bfd_vma) -1;
9840 if (!doneone)
9841 {
9842 h->plt.plist = NULL;
9843 h->needs_plt = 0;
9844 }
9845 }
9846 else
9847 {
9848 h->plt.plist = NULL;
9849 h->needs_plt = 0;
9850 }
9851
9852 return TRUE;
9853 }
9854
9855 #define PPC_LO(v) ((v) & 0xffff)
9856 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9857 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9858
9859 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9860 to set up space for global entry stubs. These are put in glink,
9861 after the branch table. */
9862
9863 static bfd_boolean
9864 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9865 {
9866 struct bfd_link_info *info;
9867 struct ppc_link_hash_table *htab;
9868 struct plt_entry *pent;
9869 asection *s, *plt;
9870
9871 if (h->root.type == bfd_link_hash_indirect)
9872 return TRUE;
9873
9874 if (!h->pointer_equality_needed)
9875 return TRUE;
9876
9877 if (h->def_regular)
9878 return TRUE;
9879
9880 info = inf;
9881 htab = ppc_hash_table (info);
9882 if (htab == NULL)
9883 return FALSE;
9884
9885 s = htab->global_entry;
9886 plt = htab->elf.splt;
9887 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9888 if (pent->plt.offset != (bfd_vma) -1
9889 && pent->addend == 0)
9890 {
9891 /* For ELFv2, if this symbol is not defined in a regular file
9892 and we are not generating a shared library or pie, then we
9893 need to define the symbol in the executable on a call stub.
9894 This is to avoid text relocations. */
9895 bfd_vma off, stub_align, stub_off, stub_size;
9896 unsigned int align_power;
9897
9898 stub_size = 16;
9899 stub_off = s->size;
9900 if (htab->params->plt_stub_align >= 0)
9901 align_power = htab->params->plt_stub_align;
9902 else
9903 align_power = -htab->params->plt_stub_align;
9904 /* Setting section alignment is delayed until we know it is
9905 non-empty. Otherwise the .text output section will be
9906 aligned at least to plt_stub_align even when no global
9907 entry stubs are needed. */
9908 if (s->alignment_power < align_power)
9909 s->alignment_power = align_power;
9910 stub_align = (bfd_vma) 1 << align_power;
9911 if (htab->params->plt_stub_align >= 0
9912 || ((((stub_off + stub_size - 1) & -stub_align)
9913 - (stub_off & -stub_align))
9914 > ((stub_size - 1) & -stub_align)))
9915 stub_off = (stub_off + stub_align - 1) & -stub_align;
9916 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
9917 off -= stub_off + s->output_offset + s->output_section->vma;
9918 /* Note that for --plt-stub-align negative we have a possible
9919 dependency between stub offset and size. Break that
9920 dependency by assuming the max stub size when calculating
9921 the stub offset. */
9922 if (PPC_HA (off) == 0)
9923 stub_size -= 4;
9924 h->root.type = bfd_link_hash_defined;
9925 h->root.u.def.section = s;
9926 h->root.u.def.value = stub_off;
9927 s->size = stub_off + stub_size;
9928 break;
9929 }
9930 return TRUE;
9931 }
9932
9933 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9934 read-only sections. */
9935
9936 static bfd_boolean
9937 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9938 {
9939 asection *sec;
9940
9941 if (h->root.type == bfd_link_hash_indirect)
9942 return TRUE;
9943
9944 sec = readonly_dynrelocs (h);
9945 if (sec != NULL)
9946 {
9947 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9948
9949 info->flags |= DF_TEXTREL;
9950 info->callbacks->minfo
9951 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
9952 sec->owner, h->root.root.string, sec);
9953
9954 /* Not an error, just cut short the traversal. */
9955 return FALSE;
9956 }
9957 return TRUE;
9958 }
9959
9960 /* Set the sizes of the dynamic sections. */
9961
9962 static bfd_boolean
9963 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9964 struct bfd_link_info *info)
9965 {
9966 struct ppc_link_hash_table *htab;
9967 bfd *dynobj;
9968 asection *s;
9969 bfd_boolean relocs;
9970 bfd *ibfd;
9971 struct got_entry *first_tlsld;
9972
9973 htab = ppc_hash_table (info);
9974 if (htab == NULL)
9975 return FALSE;
9976
9977 dynobj = htab->elf.dynobj;
9978 if (dynobj == NULL)
9979 abort ();
9980
9981 if (htab->elf.dynamic_sections_created)
9982 {
9983 /* Set the contents of the .interp section to the interpreter. */
9984 if (bfd_link_executable (info) && !info->nointerp)
9985 {
9986 s = bfd_get_linker_section (dynobj, ".interp");
9987 if (s == NULL)
9988 abort ();
9989 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9990 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9991 }
9992 }
9993
9994 /* Set up .got offsets for local syms, and space for local dynamic
9995 relocs. */
9996 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9997 {
9998 struct got_entry **lgot_ents;
9999 struct got_entry **end_lgot_ents;
10000 struct plt_entry **local_plt;
10001 struct plt_entry **end_local_plt;
10002 unsigned char *lgot_masks;
10003 bfd_size_type locsymcount;
10004 Elf_Internal_Shdr *symtab_hdr;
10005
10006 if (!is_ppc64_elf (ibfd))
10007 continue;
10008
10009 for (s = ibfd->sections; s != NULL; s = s->next)
10010 {
10011 struct ppc_dyn_relocs *p;
10012
10013 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10014 {
10015 if (!bfd_is_abs_section (p->sec)
10016 && bfd_is_abs_section (p->sec->output_section))
10017 {
10018 /* Input section has been discarded, either because
10019 it is a copy of a linkonce section or due to
10020 linker script /DISCARD/, so we'll be discarding
10021 the relocs too. */
10022 }
10023 else if (p->count != 0)
10024 {
10025 asection *srel = elf_section_data (p->sec)->sreloc;
10026 if (p->ifunc)
10027 srel = htab->elf.irelplt;
10028 srel->size += p->count * sizeof (Elf64_External_Rela);
10029 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10030 info->flags |= DF_TEXTREL;
10031 }
10032 }
10033 }
10034
10035 lgot_ents = elf_local_got_ents (ibfd);
10036 if (!lgot_ents)
10037 continue;
10038
10039 symtab_hdr = &elf_symtab_hdr (ibfd);
10040 locsymcount = symtab_hdr->sh_info;
10041 end_lgot_ents = lgot_ents + locsymcount;
10042 local_plt = (struct plt_entry **) end_lgot_ents;
10043 end_local_plt = local_plt + locsymcount;
10044 lgot_masks = (unsigned char *) end_local_plt;
10045 s = ppc64_elf_tdata (ibfd)->got;
10046 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10047 {
10048 struct got_entry **pent, *ent;
10049
10050 pent = lgot_ents;
10051 while ((ent = *pent) != NULL)
10052 if (ent->got.refcount > 0)
10053 {
10054 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10055 {
10056 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10057 *pent = ent->next;
10058 }
10059 else
10060 {
10061 unsigned int ent_size = 8;
10062 unsigned int rel_size = sizeof (Elf64_External_Rela);
10063
10064 ent->got.offset = s->size;
10065 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10066 {
10067 ent_size *= 2;
10068 rel_size *= 2;
10069 }
10070 s->size += ent_size;
10071 if ((*lgot_masks & PLT_IFUNC) != 0)
10072 {
10073 htab->elf.irelplt->size += rel_size;
10074 htab->got_reli_size += rel_size;
10075 }
10076 else if (bfd_link_pic (info)
10077 && !((ent->tls_type & TLS_TPREL) != 0
10078 && bfd_link_executable (info)))
10079 {
10080 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10081 srel->size += rel_size;
10082 }
10083 pent = &ent->next;
10084 }
10085 }
10086 else
10087 *pent = ent->next;
10088 }
10089
10090 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10091 for (; local_plt < end_local_plt; ++local_plt)
10092 {
10093 struct plt_entry *ent;
10094
10095 for (ent = *local_plt; ent != NULL; ent = ent->next)
10096 if (ent->plt.refcount > 0)
10097 {
10098 s = htab->elf.iplt;
10099 ent->plt.offset = s->size;
10100 s->size += PLT_ENTRY_SIZE (htab);
10101
10102 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10103 }
10104 else
10105 ent->plt.offset = (bfd_vma) -1;
10106 }
10107 }
10108
10109 /* Allocate global sym .plt and .got entries, and space for global
10110 sym dynamic relocs. */
10111 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10112
10113 if (!htab->opd_abi && !bfd_link_pic (info))
10114 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10115
10116 first_tlsld = NULL;
10117 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10118 {
10119 struct got_entry *ent;
10120
10121 if (!is_ppc64_elf (ibfd))
10122 continue;
10123
10124 ent = ppc64_tlsld_got (ibfd);
10125 if (ent->got.refcount > 0)
10126 {
10127 if (!htab->do_multi_toc && first_tlsld != NULL)
10128 {
10129 ent->is_indirect = TRUE;
10130 ent->got.ent = first_tlsld;
10131 }
10132 else
10133 {
10134 if (first_tlsld == NULL)
10135 first_tlsld = ent;
10136 s = ppc64_elf_tdata (ibfd)->got;
10137 ent->got.offset = s->size;
10138 ent->owner = ibfd;
10139 s->size += 16;
10140 if (bfd_link_pic (info))
10141 {
10142 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10143 srel->size += sizeof (Elf64_External_Rela);
10144 }
10145 }
10146 }
10147 else
10148 ent->got.offset = (bfd_vma) -1;
10149 }
10150
10151 /* We now have determined the sizes of the various dynamic sections.
10152 Allocate memory for them. */
10153 relocs = FALSE;
10154 for (s = dynobj->sections; s != NULL; s = s->next)
10155 {
10156 if ((s->flags & SEC_LINKER_CREATED) == 0)
10157 continue;
10158
10159 if (s == htab->brlt || s == htab->relbrlt)
10160 /* These haven't been allocated yet; don't strip. */
10161 continue;
10162 else if (s == htab->elf.sgot
10163 || s == htab->elf.splt
10164 || s == htab->elf.iplt
10165 || s == htab->glink
10166 || s == htab->global_entry
10167 || s == htab->elf.sdynbss
10168 || s == htab->elf.sdynrelro)
10169 {
10170 /* Strip this section if we don't need it; see the
10171 comment below. */
10172 }
10173 else if (s == htab->glink_eh_frame)
10174 {
10175 if (!bfd_is_abs_section (s->output_section))
10176 /* Not sized yet. */
10177 continue;
10178 }
10179 else if (CONST_STRNEQ (s->name, ".rela"))
10180 {
10181 if (s->size != 0)
10182 {
10183 if (s != htab->elf.srelplt)
10184 relocs = TRUE;
10185
10186 /* We use the reloc_count field as a counter if we need
10187 to copy relocs into the output file. */
10188 s->reloc_count = 0;
10189 }
10190 }
10191 else
10192 {
10193 /* It's not one of our sections, so don't allocate space. */
10194 continue;
10195 }
10196
10197 if (s->size == 0)
10198 {
10199 /* If we don't need this section, strip it from the
10200 output file. This is mostly to handle .rela.bss and
10201 .rela.plt. We must create both sections in
10202 create_dynamic_sections, because they must be created
10203 before the linker maps input sections to output
10204 sections. The linker does that before
10205 adjust_dynamic_symbol is called, and it is that
10206 function which decides whether anything needs to go
10207 into these sections. */
10208 s->flags |= SEC_EXCLUDE;
10209 continue;
10210 }
10211
10212 if (bfd_is_abs_section (s->output_section))
10213 _bfd_error_handler (_("warning: discarding dynamic section %s"),
10214 s->name);
10215
10216 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10217 continue;
10218
10219 /* Allocate memory for the section contents. We use bfd_zalloc
10220 here in case unused entries are not reclaimed before the
10221 section's contents are written out. This should not happen,
10222 but this way if it does we get a R_PPC64_NONE reloc in .rela
10223 sections instead of garbage.
10224 We also rely on the section contents being zero when writing
10225 the GOT and .dynrelro. */
10226 s->contents = bfd_zalloc (dynobj, s->size);
10227 if (s->contents == NULL)
10228 return FALSE;
10229 }
10230
10231 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10232 {
10233 if (!is_ppc64_elf (ibfd))
10234 continue;
10235
10236 s = ppc64_elf_tdata (ibfd)->got;
10237 if (s != NULL && s != htab->elf.sgot)
10238 {
10239 if (s->size == 0)
10240 s->flags |= SEC_EXCLUDE;
10241 else
10242 {
10243 s->contents = bfd_zalloc (ibfd, s->size);
10244 if (s->contents == NULL)
10245 return FALSE;
10246 }
10247 }
10248 s = ppc64_elf_tdata (ibfd)->relgot;
10249 if (s != NULL)
10250 {
10251 if (s->size == 0)
10252 s->flags |= SEC_EXCLUDE;
10253 else
10254 {
10255 s->contents = bfd_zalloc (ibfd, s->size);
10256 if (s->contents == NULL)
10257 return FALSE;
10258 relocs = TRUE;
10259 s->reloc_count = 0;
10260 }
10261 }
10262 }
10263
10264 if (htab->elf.dynamic_sections_created)
10265 {
10266 bfd_boolean tls_opt;
10267
10268 /* Add some entries to the .dynamic section. We fill in the
10269 values later, in ppc64_elf_finish_dynamic_sections, but we
10270 must add the entries now so that we get the correct size for
10271 the .dynamic section. The DT_DEBUG entry is filled in by the
10272 dynamic linker and used by the debugger. */
10273 #define add_dynamic_entry(TAG, VAL) \
10274 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10275
10276 if (bfd_link_executable (info))
10277 {
10278 if (!add_dynamic_entry (DT_DEBUG, 0))
10279 return FALSE;
10280 }
10281
10282 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10283 {
10284 if (!add_dynamic_entry (DT_PLTGOT, 0)
10285 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10286 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10287 || !add_dynamic_entry (DT_JMPREL, 0)
10288 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10289 return FALSE;
10290 }
10291
10292 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10293 {
10294 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10295 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10296 return FALSE;
10297 }
10298
10299 tls_opt = (htab->params->tls_get_addr_opt
10300 && htab->tls_get_addr_fd != NULL
10301 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10302 if (tls_opt || !htab->opd_abi)
10303 {
10304 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10305 return FALSE;
10306 }
10307
10308 if (relocs)
10309 {
10310 if (!add_dynamic_entry (DT_RELA, 0)
10311 || !add_dynamic_entry (DT_RELASZ, 0)
10312 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10313 return FALSE;
10314
10315 /* If any dynamic relocs apply to a read-only section,
10316 then we need a DT_TEXTREL entry. */
10317 if ((info->flags & DF_TEXTREL) == 0)
10318 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10319
10320 if ((info->flags & DF_TEXTREL) != 0)
10321 {
10322 if (!add_dynamic_entry (DT_TEXTREL, 0))
10323 return FALSE;
10324 }
10325 }
10326 }
10327 #undef add_dynamic_entry
10328
10329 return TRUE;
10330 }
10331
10332 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10333
10334 static bfd_boolean
10335 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10336 {
10337 if (h->plt.plist != NULL
10338 && !h->def_regular
10339 && !h->pointer_equality_needed)
10340 return FALSE;
10341
10342 return _bfd_elf_hash_symbol (h);
10343 }
10344
10345 /* Determine the type of stub needed, if any, for a call. */
10346
10347 static inline enum ppc_stub_type
10348 ppc_type_of_stub (asection *input_sec,
10349 const Elf_Internal_Rela *rel,
10350 struct ppc_link_hash_entry **hash,
10351 struct plt_entry **plt_ent,
10352 bfd_vma destination,
10353 unsigned long local_off)
10354 {
10355 struct ppc_link_hash_entry *h = *hash;
10356 bfd_vma location;
10357 bfd_vma branch_offset;
10358 bfd_vma max_branch_offset;
10359 enum elf_ppc64_reloc_type r_type;
10360
10361 if (h != NULL)
10362 {
10363 struct plt_entry *ent;
10364 struct ppc_link_hash_entry *fdh = h;
10365 if (h->oh != NULL
10366 && h->oh->is_func_descriptor)
10367 {
10368 fdh = ppc_follow_link (h->oh);
10369 *hash = fdh;
10370 }
10371
10372 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10373 if (ent->addend == rel->r_addend
10374 && ent->plt.offset != (bfd_vma) -1)
10375 {
10376 *plt_ent = ent;
10377 return ppc_stub_plt_call;
10378 }
10379
10380 /* Here, we know we don't have a plt entry. If we don't have a
10381 either a defined function descriptor or a defined entry symbol
10382 in a regular object file, then it is pointless trying to make
10383 any other type of stub. */
10384 if (!is_static_defined (&fdh->elf)
10385 && !is_static_defined (&h->elf))
10386 return ppc_stub_none;
10387 }
10388 else if (elf_local_got_ents (input_sec->owner) != NULL)
10389 {
10390 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10391 struct plt_entry **local_plt = (struct plt_entry **)
10392 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10393 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10394
10395 if (local_plt[r_symndx] != NULL)
10396 {
10397 struct plt_entry *ent;
10398
10399 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10400 if (ent->addend == rel->r_addend
10401 && ent->plt.offset != (bfd_vma) -1)
10402 {
10403 *plt_ent = ent;
10404 return ppc_stub_plt_call;
10405 }
10406 }
10407 }
10408
10409 /* Determine where the call point is. */
10410 location = (input_sec->output_offset
10411 + input_sec->output_section->vma
10412 + rel->r_offset);
10413
10414 branch_offset = destination - location;
10415 r_type = ELF64_R_TYPE (rel->r_info);
10416
10417 /* Determine if a long branch stub is needed. */
10418 max_branch_offset = 1 << 25;
10419 if (r_type != R_PPC64_REL24)
10420 max_branch_offset = 1 << 15;
10421
10422 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10423 /* We need a stub. Figure out whether a long_branch or plt_branch
10424 is needed later. */
10425 return ppc_stub_long_branch;
10426
10427 return ppc_stub_none;
10428 }
10429
10430 /* With power7 weakly ordered memory model, it is possible for ld.so
10431 to update a plt entry in one thread and have another thread see a
10432 stale zero toc entry. To avoid this we need some sort of acquire
10433 barrier in the call stub. One solution is to make the load of the
10434 toc word seem to appear to depend on the load of the function entry
10435 word. Another solution is to test for r2 being zero, and branch to
10436 the appropriate glink entry if so.
10437
10438 . fake dep barrier compare
10439 . ld 12,xxx(2) ld 12,xxx(2)
10440 . mtctr 12 mtctr 12
10441 . xor 11,12,12 ld 2,xxx+8(2)
10442 . add 2,2,11 cmpldi 2,0
10443 . ld 2,xxx+8(2) bnectr+
10444 . bctr b <glink_entry>
10445
10446 The solution involving the compare turns out to be faster, so
10447 that's what we use unless the branch won't reach. */
10448
10449 #define ALWAYS_USE_FAKE_DEP 0
10450 #define ALWAYS_EMIT_R2SAVE 0
10451
10452 static inline unsigned int
10453 plt_stub_size (struct ppc_link_hash_table *htab,
10454 struct ppc_stub_hash_entry *stub_entry,
10455 bfd_vma off)
10456 {
10457 unsigned size = 12;
10458
10459 if (ALWAYS_EMIT_R2SAVE
10460 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10461 size += 4;
10462 if (PPC_HA (off) != 0)
10463 size += 4;
10464 if (htab->opd_abi)
10465 {
10466 size += 4;
10467 if (htab->params->plt_static_chain)
10468 size += 4;
10469 if (htab->params->plt_thread_safe
10470 && htab->elf.dynamic_sections_created
10471 && stub_entry->h != NULL
10472 && stub_entry->h->elf.dynindx != -1)
10473 size += 8;
10474 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10475 size += 4;
10476 }
10477 if (stub_entry->h != NULL
10478 && (stub_entry->h == htab->tls_get_addr_fd
10479 || stub_entry->h == htab->tls_get_addr)
10480 && htab->params->tls_get_addr_opt)
10481 {
10482 size += 7 * 4;
10483 if (ALWAYS_EMIT_R2SAVE
10484 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10485 size += 6 * 4;
10486 }
10487 return size;
10488 }
10489
10490 /* Depending on the sign of plt_stub_align:
10491 If positive, return the padding to align to a 2**plt_stub_align
10492 boundary.
10493 If negative, if this stub would cross fewer 2**plt_stub_align
10494 boundaries if we align, then return the padding needed to do so. */
10495
10496 static inline unsigned int
10497 plt_stub_pad (struct ppc_link_hash_table *htab,
10498 struct ppc_stub_hash_entry *stub_entry,
10499 bfd_vma plt_off)
10500 {
10501 int stub_align;
10502 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10503 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10504
10505 if (htab->params->plt_stub_align >= 0)
10506 {
10507 stub_align = 1 << htab->params->plt_stub_align;
10508 if ((stub_off & (stub_align - 1)) != 0)
10509 return stub_align - (stub_off & (stub_align - 1));
10510 return 0;
10511 }
10512
10513 stub_align = 1 << -htab->params->plt_stub_align;
10514 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10515 > ((stub_size - 1) & -stub_align))
10516 return stub_align - (stub_off & (stub_align - 1));
10517 return 0;
10518 }
10519
10520 /* Build a .plt call stub. */
10521
10522 static inline bfd_byte *
10523 build_plt_stub (struct ppc_link_hash_table *htab,
10524 struct ppc_stub_hash_entry *stub_entry,
10525 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10526 {
10527 bfd *obfd = htab->params->stub_bfd;
10528 bfd_boolean plt_load_toc = htab->opd_abi;
10529 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10530 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10531 && htab->elf.dynamic_sections_created
10532 && stub_entry->h != NULL
10533 && stub_entry->h->elf.dynindx != -1);
10534 bfd_boolean use_fake_dep = plt_thread_safe;
10535 bfd_vma cmp_branch_off = 0;
10536
10537 if (!ALWAYS_USE_FAKE_DEP
10538 && plt_load_toc
10539 && plt_thread_safe
10540 && !((stub_entry->h == htab->tls_get_addr_fd
10541 || stub_entry->h == htab->tls_get_addr)
10542 && htab->params->tls_get_addr_opt))
10543 {
10544 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10545 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10546 / PLT_ENTRY_SIZE (htab));
10547 bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8;
10548 bfd_vma to, from;
10549
10550 if (pltindex > 32768)
10551 glinkoff += (pltindex - 32768) * 4;
10552 to = (glinkoff
10553 + htab->glink->output_offset
10554 + htab->glink->output_section->vma);
10555 from = (p - stub_entry->group->stub_sec->contents
10556 + 4 * (ALWAYS_EMIT_R2SAVE
10557 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10558 + 4 * (PPC_HA (offset) != 0)
10559 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10560 != PPC_HA (offset))
10561 + 4 * (plt_static_chain != 0)
10562 + 20
10563 + stub_entry->group->stub_sec->output_offset
10564 + stub_entry->group->stub_sec->output_section->vma);
10565 cmp_branch_off = to - from;
10566 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10567 }
10568
10569 if (PPC_HA (offset) != 0)
10570 {
10571 if (r != NULL)
10572 {
10573 if (ALWAYS_EMIT_R2SAVE
10574 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10575 r[0].r_offset += 4;
10576 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10577 r[1].r_offset = r[0].r_offset + 4;
10578 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10579 r[1].r_addend = r[0].r_addend;
10580 if (plt_load_toc)
10581 {
10582 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10583 {
10584 r[2].r_offset = r[1].r_offset + 4;
10585 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10586 r[2].r_addend = r[0].r_addend;
10587 }
10588 else
10589 {
10590 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10591 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10592 r[2].r_addend = r[0].r_addend + 8;
10593 if (plt_static_chain)
10594 {
10595 r[3].r_offset = r[2].r_offset + 4;
10596 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10597 r[3].r_addend = r[0].r_addend + 16;
10598 }
10599 }
10600 }
10601 }
10602 if (ALWAYS_EMIT_R2SAVE
10603 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10604 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10605 if (plt_load_toc)
10606 {
10607 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10608 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10609 }
10610 else
10611 {
10612 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10613 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10614 }
10615 if (plt_load_toc
10616 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10617 {
10618 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10619 offset = 0;
10620 }
10621 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10622 if (plt_load_toc)
10623 {
10624 if (use_fake_dep)
10625 {
10626 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10627 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10628 }
10629 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10630 if (plt_static_chain)
10631 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10632 }
10633 }
10634 else
10635 {
10636 if (r != NULL)
10637 {
10638 if (ALWAYS_EMIT_R2SAVE
10639 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10640 r[0].r_offset += 4;
10641 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10642 if (plt_load_toc)
10643 {
10644 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10645 {
10646 r[1].r_offset = r[0].r_offset + 4;
10647 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10648 r[1].r_addend = r[0].r_addend;
10649 }
10650 else
10651 {
10652 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10653 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10654 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10655 if (plt_static_chain)
10656 {
10657 r[2].r_offset = r[1].r_offset + 4;
10658 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10659 r[2].r_addend = r[0].r_addend + 8;
10660 }
10661 }
10662 }
10663 }
10664 if (ALWAYS_EMIT_R2SAVE
10665 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10666 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10667 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10668 if (plt_load_toc
10669 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10670 {
10671 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10672 offset = 0;
10673 }
10674 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10675 if (plt_load_toc)
10676 {
10677 if (use_fake_dep)
10678 {
10679 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10680 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10681 }
10682 if (plt_static_chain)
10683 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10684 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10685 }
10686 }
10687 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10688 {
10689 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10690 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10691 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10692 }
10693 else
10694 bfd_put_32 (obfd, BCTR, p), p += 4;
10695 return p;
10696 }
10697
10698 /* Build a special .plt call stub for __tls_get_addr. */
10699
10700 #define LD_R11_0R3 0xe9630000
10701 #define LD_R12_0R3 0xe9830000
10702 #define MR_R0_R3 0x7c601b78
10703 #define CMPDI_R11_0 0x2c2b0000
10704 #define ADD_R3_R12_R13 0x7c6c6a14
10705 #define BEQLR 0x4d820020
10706 #define MR_R3_R0 0x7c030378
10707 #define STD_R11_0R1 0xf9610000
10708 #define BCTRL 0x4e800421
10709 #define LD_R11_0R1 0xe9610000
10710 #define MTLR_R11 0x7d6803a6
10711
10712 static inline bfd_byte *
10713 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10714 struct ppc_stub_hash_entry *stub_entry,
10715 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10716 {
10717 bfd *obfd = htab->params->stub_bfd;
10718
10719 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10720 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10721 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10722 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10723 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10724 bfd_put_32 (obfd, BEQLR, p), p += 4;
10725 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10726 if (r != NULL)
10727 r[0].r_offset += 7 * 4;
10728 if (!ALWAYS_EMIT_R2SAVE
10729 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10730 return build_plt_stub (htab, stub_entry, p, offset, r);
10731
10732 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10733 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10734
10735 if (r != NULL)
10736 r[0].r_offset += 2 * 4;
10737 p = build_plt_stub (htab, stub_entry, p, offset, r);
10738 bfd_put_32 (obfd, BCTRL, p - 4);
10739
10740 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10741 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10742 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10743 bfd_put_32 (obfd, BLR, p), p += 4;
10744
10745 return p;
10746 }
10747
10748 static Elf_Internal_Rela *
10749 get_relocs (asection *sec, int count)
10750 {
10751 Elf_Internal_Rela *relocs;
10752 struct bfd_elf_section_data *elfsec_data;
10753
10754 elfsec_data = elf_section_data (sec);
10755 relocs = elfsec_data->relocs;
10756 if (relocs == NULL)
10757 {
10758 bfd_size_type relsize;
10759 relsize = sec->reloc_count * sizeof (*relocs);
10760 relocs = bfd_alloc (sec->owner, relsize);
10761 if (relocs == NULL)
10762 return NULL;
10763 elfsec_data->relocs = relocs;
10764 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10765 sizeof (Elf_Internal_Shdr));
10766 if (elfsec_data->rela.hdr == NULL)
10767 return NULL;
10768 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10769 * sizeof (Elf64_External_Rela));
10770 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10771 sec->reloc_count = 0;
10772 }
10773 relocs += sec->reloc_count;
10774 sec->reloc_count += count;
10775 return relocs;
10776 }
10777
10778 static bfd_vma
10779 get_r2off (struct bfd_link_info *info,
10780 struct ppc_stub_hash_entry *stub_entry)
10781 {
10782 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10783 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10784
10785 if (r2off == 0)
10786 {
10787 /* Support linking -R objects. Get the toc pointer from the
10788 opd entry. */
10789 char buf[8];
10790 if (!htab->opd_abi)
10791 return r2off;
10792 asection *opd = stub_entry->h->elf.root.u.def.section;
10793 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10794
10795 if (strcmp (opd->name, ".opd") != 0
10796 || opd->reloc_count != 0)
10797 {
10798 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%pT'\n"),
10799 stub_entry->h->elf.root.root.string);
10800 bfd_set_error (bfd_error_bad_value);
10801 return (bfd_vma) -1;
10802 }
10803 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10804 return (bfd_vma) -1;
10805 r2off = bfd_get_64 (opd->owner, buf);
10806 r2off -= elf_gp (info->output_bfd);
10807 }
10808 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10809 return r2off;
10810 }
10811
10812 static bfd_boolean
10813 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10814 {
10815 struct ppc_stub_hash_entry *stub_entry;
10816 struct ppc_branch_hash_entry *br_entry;
10817 struct bfd_link_info *info;
10818 struct ppc_link_hash_table *htab;
10819 bfd_byte *loc;
10820 bfd_byte *p;
10821 bfd_vma dest, off;
10822 Elf_Internal_Rela *r;
10823 asection *plt;
10824
10825 /* Massage our args to the form they really have. */
10826 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10827 info = in_arg;
10828
10829 htab = ppc_hash_table (info);
10830 if (htab == NULL)
10831 return FALSE;
10832
10833 /* Make a note of the offset within the stubs for this entry. */
10834 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10835 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10836
10837 htab->stub_count[stub_entry->stub_type - 1] += 1;
10838 switch (stub_entry->stub_type)
10839 {
10840 case ppc_stub_long_branch:
10841 case ppc_stub_long_branch_r2off:
10842 /* Branches are relative. This is where we are going to. */
10843 dest = (stub_entry->target_value
10844 + stub_entry->target_section->output_offset
10845 + stub_entry->target_section->output_section->vma);
10846 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10847 off = dest;
10848
10849 /* And this is where we are coming from. */
10850 off -= (stub_entry->stub_offset
10851 + stub_entry->group->stub_sec->output_offset
10852 + stub_entry->group->stub_sec->output_section->vma);
10853
10854 p = loc;
10855 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10856 {
10857 bfd_vma r2off = get_r2off (info, stub_entry);
10858
10859 if (r2off == (bfd_vma) -1)
10860 {
10861 htab->stub_error = TRUE;
10862 return FALSE;
10863 }
10864 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
10865 p += 4;
10866 if (PPC_HA (r2off) != 0)
10867 {
10868 bfd_put_32 (htab->params->stub_bfd,
10869 ADDIS_R2_R2 | PPC_HA (r2off), p);
10870 p += 4;
10871 }
10872 if (PPC_LO (r2off) != 0)
10873 {
10874 bfd_put_32 (htab->params->stub_bfd,
10875 ADDI_R2_R2 | PPC_LO (r2off), p);
10876 p += 4;
10877 }
10878 off -= p - loc;
10879 }
10880 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p);
10881 p += 4;
10882
10883 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10884 {
10885 _bfd_error_handler
10886 (_("long branch stub `%s' offset overflow"),
10887 stub_entry->root.string);
10888 htab->stub_error = TRUE;
10889 return FALSE;
10890 }
10891
10892 if (info->emitrelocations)
10893 {
10894 r = get_relocs (stub_entry->group->stub_sec, 1);
10895 if (r == NULL)
10896 return FALSE;
10897 r->r_offset = p - 4 - stub_entry->group->stub_sec->contents;
10898 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10899 r->r_addend = dest;
10900 if (stub_entry->h != NULL)
10901 {
10902 struct elf_link_hash_entry **hashes;
10903 unsigned long symndx;
10904 struct ppc_link_hash_entry *h;
10905
10906 hashes = elf_sym_hashes (htab->params->stub_bfd);
10907 if (hashes == NULL)
10908 {
10909 bfd_size_type hsize;
10910
10911 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10912 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10913 if (hashes == NULL)
10914 return FALSE;
10915 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10916 htab->stub_globals = 1;
10917 }
10918 symndx = htab->stub_globals++;
10919 h = stub_entry->h;
10920 hashes[symndx] = &h->elf;
10921 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10922 if (h->oh != NULL && h->oh->is_func)
10923 h = ppc_follow_link (h->oh);
10924 if (h->elf.root.u.def.section != stub_entry->target_section)
10925 /* H is an opd symbol. The addend must be zero. */
10926 r->r_addend = 0;
10927 else
10928 {
10929 off = (h->elf.root.u.def.value
10930 + h->elf.root.u.def.section->output_offset
10931 + h->elf.root.u.def.section->output_section->vma);
10932 r->r_addend -= off;
10933 }
10934 }
10935 }
10936 break;
10937
10938 case ppc_stub_plt_branch:
10939 case ppc_stub_plt_branch_r2off:
10940 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10941 stub_entry->root.string + 9,
10942 FALSE, FALSE);
10943 if (br_entry == NULL)
10944 {
10945 _bfd_error_handler (_("can't find branch stub `%s'"),
10946 stub_entry->root.string);
10947 htab->stub_error = TRUE;
10948 return FALSE;
10949 }
10950
10951 dest = (stub_entry->target_value
10952 + stub_entry->target_section->output_offset
10953 + stub_entry->target_section->output_section->vma);
10954 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10955 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10956
10957 bfd_put_64 (htab->brlt->owner, dest,
10958 htab->brlt->contents + br_entry->offset);
10959
10960 if (br_entry->iter == htab->stub_iteration)
10961 {
10962 br_entry->iter = 0;
10963
10964 if (htab->relbrlt != NULL)
10965 {
10966 /* Create a reloc for the branch lookup table entry. */
10967 Elf_Internal_Rela rela;
10968 bfd_byte *rl;
10969
10970 rela.r_offset = (br_entry->offset
10971 + htab->brlt->output_offset
10972 + htab->brlt->output_section->vma);
10973 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10974 rela.r_addend = dest;
10975
10976 rl = htab->relbrlt->contents;
10977 rl += (htab->relbrlt->reloc_count++
10978 * sizeof (Elf64_External_Rela));
10979 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10980 }
10981 else if (info->emitrelocations)
10982 {
10983 r = get_relocs (htab->brlt, 1);
10984 if (r == NULL)
10985 return FALSE;
10986 /* brlt, being SEC_LINKER_CREATED does not go through the
10987 normal reloc processing. Symbols and offsets are not
10988 translated from input file to output file form, so
10989 set up the offset per the output file. */
10990 r->r_offset = (br_entry->offset
10991 + htab->brlt->output_offset
10992 + htab->brlt->output_section->vma);
10993 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10994 r->r_addend = dest;
10995 }
10996 }
10997
10998 dest = (br_entry->offset
10999 + htab->brlt->output_offset
11000 + htab->brlt->output_section->vma);
11001
11002 off = (dest
11003 - elf_gp (info->output_bfd)
11004 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11005
11006 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11007 {
11008 info->callbacks->einfo
11009 (_("%P: linkage table error against `%pT'\n"),
11010 stub_entry->root.string);
11011 bfd_set_error (bfd_error_bad_value);
11012 htab->stub_error = TRUE;
11013 return FALSE;
11014 }
11015
11016 if (info->emitrelocations)
11017 {
11018 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11019 if (r == NULL)
11020 return FALSE;
11021 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11022 if (bfd_big_endian (info->output_bfd))
11023 r[0].r_offset += 2;
11024 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11025 r[0].r_offset += 4;
11026 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11027 r[0].r_addend = dest;
11028 if (PPC_HA (off) != 0)
11029 {
11030 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11031 r[1].r_offset = r[0].r_offset + 4;
11032 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11033 r[1].r_addend = r[0].r_addend;
11034 }
11035 }
11036
11037 p = loc;
11038 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11039 {
11040 if (PPC_HA (off) != 0)
11041 {
11042 bfd_put_32 (htab->params->stub_bfd,
11043 ADDIS_R12_R2 | PPC_HA (off), p);
11044 p += 4;
11045 bfd_put_32 (htab->params->stub_bfd,
11046 LD_R12_0R12 | PPC_LO (off), p);
11047 }
11048 else
11049 bfd_put_32 (htab->params->stub_bfd,
11050 LD_R12_0R2 | PPC_LO (off), p);
11051 }
11052 else
11053 {
11054 bfd_vma r2off = get_r2off (info, stub_entry);
11055
11056 if (r2off == (bfd_vma) -1)
11057 {
11058 htab->stub_error = TRUE;
11059 return FALSE;
11060 }
11061
11062 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p);
11063 p += 4;
11064 if (PPC_HA (off) != 0)
11065 {
11066 bfd_put_32 (htab->params->stub_bfd,
11067 ADDIS_R12_R2 | PPC_HA (off), p);
11068 p += 4;
11069 bfd_put_32 (htab->params->stub_bfd,
11070 LD_R12_0R12 | PPC_LO (off), p);
11071 }
11072 else
11073 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p);
11074
11075 if (PPC_HA (r2off) != 0)
11076 {
11077 p += 4;
11078 bfd_put_32 (htab->params->stub_bfd,
11079 ADDIS_R2_R2 | PPC_HA (r2off), p);
11080 }
11081 if (PPC_LO (r2off) != 0)
11082 {
11083 p += 4;
11084 bfd_put_32 (htab->params->stub_bfd,
11085 ADDI_R2_R2 | PPC_LO (r2off), p);
11086 }
11087 }
11088 p += 4;
11089 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p);
11090 p += 4;
11091 bfd_put_32 (htab->params->stub_bfd, BCTR, p);
11092 p += 4;
11093 break;
11094
11095 case ppc_stub_plt_call:
11096 case ppc_stub_plt_call_r2save:
11097 if (stub_entry->h != NULL
11098 && stub_entry->h->is_func_descriptor
11099 && stub_entry->h->oh != NULL)
11100 {
11101 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11102
11103 /* If the old-ABI "dot-symbol" is undefined make it weak so
11104 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11105 if (fh->elf.root.type == bfd_link_hash_undefined
11106 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11107 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11108 fh->elf.root.type = bfd_link_hash_undefweak;
11109 }
11110
11111 /* Now build the stub. */
11112 dest = stub_entry->plt_ent->plt.offset & ~1;
11113 if (dest >= (bfd_vma) -2)
11114 abort ();
11115
11116 plt = htab->elf.splt;
11117 if (!htab->elf.dynamic_sections_created
11118 || stub_entry->h == NULL
11119 || stub_entry->h->elf.dynindx == -1)
11120 plt = htab->elf.iplt;
11121
11122 dest += plt->output_offset + plt->output_section->vma;
11123
11124 if (stub_entry->h == NULL
11125 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11126 {
11127 Elf_Internal_Rela rela;
11128 bfd_byte *rl;
11129
11130 rela.r_offset = dest;
11131 if (htab->opd_abi)
11132 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11133 else
11134 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11135 rela.r_addend = (stub_entry->target_value
11136 + stub_entry->target_section->output_offset
11137 + stub_entry->target_section->output_section->vma);
11138
11139 rl = (htab->elf.irelplt->contents
11140 + (htab->elf.irelplt->reloc_count++
11141 * sizeof (Elf64_External_Rela)));
11142 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11143 stub_entry->plt_ent->plt.offset |= 1;
11144 htab->local_ifunc_resolver = 1;
11145 }
11146
11147 off = (dest
11148 - elf_gp (info->output_bfd)
11149 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11150
11151 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11152 {
11153 info->callbacks->einfo
11154 /* xgettext:c-format */
11155 (_("%P: linkage table error against `%pT'\n"),
11156 stub_entry->h != NULL
11157 ? stub_entry->h->elf.root.root.string
11158 : "<local sym>");
11159 bfd_set_error (bfd_error_bad_value);
11160 htab->stub_error = TRUE;
11161 return FALSE;
11162 }
11163
11164 if (htab->params->plt_stub_align != 0)
11165 {
11166 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11167
11168 stub_entry->group->stub_sec->size += pad;
11169 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11170 loc += pad;
11171 }
11172
11173 r = NULL;
11174 if (info->emitrelocations)
11175 {
11176 r = get_relocs (stub_entry->group->stub_sec,
11177 ((PPC_HA (off) != 0)
11178 + (htab->opd_abi
11179 ? 2 + (htab->params->plt_static_chain
11180 && PPC_HA (off + 16) == PPC_HA (off))
11181 : 1)));
11182 if (r == NULL)
11183 return FALSE;
11184 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11185 if (bfd_big_endian (info->output_bfd))
11186 r[0].r_offset += 2;
11187 r[0].r_addend = dest;
11188 }
11189 if (stub_entry->h != NULL
11190 && (stub_entry->h == htab->tls_get_addr_fd
11191 || stub_entry->h == htab->tls_get_addr)
11192 && htab->params->tls_get_addr_opt)
11193 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11194 else
11195 p = build_plt_stub (htab, stub_entry, loc, off, r);
11196 break;
11197
11198 case ppc_stub_save_res:
11199 return TRUE;
11200
11201 default:
11202 BFD_FAIL ();
11203 return FALSE;
11204 }
11205
11206 stub_entry->group->stub_sec->size += p - loc;
11207
11208 if (htab->params->emit_stub_syms)
11209 {
11210 struct elf_link_hash_entry *h;
11211 size_t len1, len2;
11212 char *name;
11213 const char *const stub_str[] = { "long_branch",
11214 "long_branch_r2off",
11215 "plt_branch",
11216 "plt_branch_r2off",
11217 "plt_call",
11218 "plt_call" };
11219
11220 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11221 len2 = strlen (stub_entry->root.string);
11222 name = bfd_malloc (len1 + len2 + 2);
11223 if (name == NULL)
11224 return FALSE;
11225 memcpy (name, stub_entry->root.string, 9);
11226 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11227 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11228 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11229 if (h == NULL)
11230 return FALSE;
11231 if (h->root.type == bfd_link_hash_new)
11232 {
11233 h->root.type = bfd_link_hash_defined;
11234 h->root.u.def.section = stub_entry->group->stub_sec;
11235 h->root.u.def.value = stub_entry->stub_offset;
11236 h->ref_regular = 1;
11237 h->def_regular = 1;
11238 h->ref_regular_nonweak = 1;
11239 h->forced_local = 1;
11240 h->non_elf = 0;
11241 h->root.linker_def = 1;
11242 }
11243 }
11244
11245 return TRUE;
11246 }
11247
11248 /* As above, but don't actually build the stub. Just bump offset so
11249 we know stub section sizes, and select plt_branch stubs where
11250 long_branch stubs won't do. */
11251
11252 static bfd_boolean
11253 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11254 {
11255 struct ppc_stub_hash_entry *stub_entry;
11256 struct bfd_link_info *info;
11257 struct ppc_link_hash_table *htab;
11258 bfd_vma off;
11259 int size;
11260
11261 /* Massage our args to the form they really have. */
11262 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11263 info = in_arg;
11264
11265 htab = ppc_hash_table (info);
11266 if (htab == NULL)
11267 return FALSE;
11268
11269 if (stub_entry->h != NULL
11270 && stub_entry->h->save_res
11271 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11272 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11273 {
11274 /* Don't make stubs to out-of-line register save/restore
11275 functions. Instead, emit copies of the functions. */
11276 stub_entry->group->needs_save_res = 1;
11277 stub_entry->stub_type = ppc_stub_save_res;
11278 return TRUE;
11279 }
11280
11281 if (stub_entry->stub_type == ppc_stub_plt_call
11282 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11283 {
11284 asection *plt;
11285 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11286 if (off >= (bfd_vma) -2)
11287 abort ();
11288 plt = htab->elf.splt;
11289 if (!htab->elf.dynamic_sections_created
11290 || stub_entry->h == NULL
11291 || stub_entry->h->elf.dynindx == -1)
11292 plt = htab->elf.iplt;
11293 off += (plt->output_offset
11294 + plt->output_section->vma
11295 - elf_gp (info->output_bfd)
11296 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11297
11298 size = plt_stub_size (htab, stub_entry, off);
11299 if (stub_entry->h != NULL
11300 && (stub_entry->h == htab->tls_get_addr_fd
11301 || stub_entry->h == htab->tls_get_addr)
11302 && htab->params->tls_get_addr_opt
11303 && (ALWAYS_EMIT_R2SAVE
11304 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11305 stub_entry->group->tls_get_addr_opt_bctrl
11306 = stub_entry->group->stub_sec->size + size - 5 * 4;
11307
11308 if (htab->params->plt_stub_align)
11309 size += plt_stub_pad (htab, stub_entry, off);
11310 if (info->emitrelocations)
11311 {
11312 stub_entry->group->stub_sec->reloc_count
11313 += ((PPC_HA (off) != 0)
11314 + (htab->opd_abi
11315 ? 2 + (htab->params->plt_static_chain
11316 && PPC_HA (off + 16) == PPC_HA (off))
11317 : 1));
11318 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11319 }
11320 }
11321 else
11322 {
11323 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11324 variants. */
11325 bfd_vma r2off = 0;
11326 bfd_vma local_off = 0;
11327
11328 off = (stub_entry->target_value
11329 + stub_entry->target_section->output_offset
11330 + stub_entry->target_section->output_section->vma);
11331 off -= (stub_entry->group->stub_sec->size
11332 + stub_entry->group->stub_sec->output_offset
11333 + stub_entry->group->stub_sec->output_section->vma);
11334
11335 /* Reset the stub type from the plt variant in case we now
11336 can reach with a shorter stub. */
11337 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11338 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11339
11340 size = 4;
11341 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11342 {
11343 r2off = get_r2off (info, stub_entry);
11344 if (r2off == (bfd_vma) -1)
11345 {
11346 htab->stub_error = TRUE;
11347 return FALSE;
11348 }
11349 size = 8;
11350 if (PPC_HA (r2off) != 0)
11351 size += 4;
11352 if (PPC_LO (r2off) != 0)
11353 size += 4;
11354 off -= size - 4;
11355 }
11356
11357 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11358
11359 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11360 Do the same for -R objects without function descriptors. */
11361 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11362 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11363 && r2off == 0
11364 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11365 {
11366 struct ppc_branch_hash_entry *br_entry;
11367
11368 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11369 stub_entry->root.string + 9,
11370 TRUE, FALSE);
11371 if (br_entry == NULL)
11372 {
11373 _bfd_error_handler (_("can't build branch stub `%s'"),
11374 stub_entry->root.string);
11375 htab->stub_error = TRUE;
11376 return FALSE;
11377 }
11378
11379 if (br_entry->iter != htab->stub_iteration)
11380 {
11381 br_entry->iter = htab->stub_iteration;
11382 br_entry->offset = htab->brlt->size;
11383 htab->brlt->size += 8;
11384
11385 if (htab->relbrlt != NULL)
11386 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11387 else if (info->emitrelocations)
11388 {
11389 htab->brlt->reloc_count += 1;
11390 htab->brlt->flags |= SEC_RELOC;
11391 }
11392 }
11393
11394 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11395 off = (br_entry->offset
11396 + htab->brlt->output_offset
11397 + htab->brlt->output_section->vma
11398 - elf_gp (info->output_bfd)
11399 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11400
11401 if (info->emitrelocations)
11402 {
11403 stub_entry->group->stub_sec->reloc_count
11404 += 1 + (PPC_HA (off) != 0);
11405 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11406 }
11407
11408 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11409 {
11410 size = 12;
11411 if (PPC_HA (off) != 0)
11412 size = 16;
11413 }
11414 else
11415 {
11416 size = 16;
11417 if (PPC_HA (off) != 0)
11418 size += 4;
11419
11420 if (PPC_HA (r2off) != 0)
11421 size += 4;
11422 if (PPC_LO (r2off) != 0)
11423 size += 4;
11424 }
11425 }
11426 else if (info->emitrelocations)
11427 {
11428 stub_entry->group->stub_sec->reloc_count += 1;
11429 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11430 }
11431 }
11432
11433 stub_entry->group->stub_sec->size += size;
11434 return TRUE;
11435 }
11436
11437 /* Set up various things so that we can make a list of input sections
11438 for each output section included in the link. Returns -1 on error,
11439 0 when no stubs will be needed, and 1 on success. */
11440
11441 int
11442 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11443 {
11444 unsigned int id;
11445 bfd_size_type amt;
11446 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11447
11448 if (htab == NULL)
11449 return -1;
11450
11451 htab->sec_info_arr_size = bfd_get_next_section_id ();
11452 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11453 htab->sec_info = bfd_zmalloc (amt);
11454 if (htab->sec_info == NULL)
11455 return -1;
11456
11457 /* Set toc_off for com, und, abs and ind sections. */
11458 for (id = 0; id < 3; id++)
11459 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11460
11461 return 1;
11462 }
11463
11464 /* Set up for first pass at multitoc partitioning. */
11465
11466 void
11467 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11468 {
11469 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11470
11471 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11472 htab->toc_bfd = NULL;
11473 htab->toc_first_sec = NULL;
11474 }
11475
11476 /* The linker repeatedly calls this function for each TOC input section
11477 and linker generated GOT section. Group input bfds such that the toc
11478 within a group is less than 64k in size. */
11479
11480 bfd_boolean
11481 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11482 {
11483 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11484 bfd_vma addr, off, limit;
11485
11486 if (htab == NULL)
11487 return FALSE;
11488
11489 if (!htab->second_toc_pass)
11490 {
11491 /* Keep track of the first .toc or .got section for this input bfd. */
11492 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11493
11494 if (new_bfd)
11495 {
11496 htab->toc_bfd = isec->owner;
11497 htab->toc_first_sec = isec;
11498 }
11499
11500 addr = isec->output_offset + isec->output_section->vma;
11501 off = addr - htab->toc_curr;
11502 limit = 0x80008000;
11503 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11504 limit = 0x10000;
11505 if (off + isec->size > limit)
11506 {
11507 addr = (htab->toc_first_sec->output_offset
11508 + htab->toc_first_sec->output_section->vma);
11509 htab->toc_curr = addr;
11510 htab->toc_curr &= -TOC_BASE_ALIGN;
11511 }
11512
11513 /* toc_curr is the base address of this toc group. Set elf_gp
11514 for the input section to be the offset relative to the
11515 output toc base plus 0x8000. Making the input elf_gp an
11516 offset allows us to move the toc as a whole without
11517 recalculating input elf_gp. */
11518 off = htab->toc_curr - elf_gp (info->output_bfd);
11519 off += TOC_BASE_OFF;
11520
11521 /* Die if someone uses a linker script that doesn't keep input
11522 file .toc and .got together. */
11523 if (new_bfd
11524 && elf_gp (isec->owner) != 0
11525 && elf_gp (isec->owner) != off)
11526 return FALSE;
11527
11528 elf_gp (isec->owner) = off;
11529 return TRUE;
11530 }
11531
11532 /* During the second pass toc_first_sec points to the start of
11533 a toc group, and toc_curr is used to track the old elf_gp.
11534 We use toc_bfd to ensure we only look at each bfd once. */
11535 if (htab->toc_bfd == isec->owner)
11536 return TRUE;
11537 htab->toc_bfd = isec->owner;
11538
11539 if (htab->toc_first_sec == NULL
11540 || htab->toc_curr != elf_gp (isec->owner))
11541 {
11542 htab->toc_curr = elf_gp (isec->owner);
11543 htab->toc_first_sec = isec;
11544 }
11545 addr = (htab->toc_first_sec->output_offset
11546 + htab->toc_first_sec->output_section->vma);
11547 off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF;
11548 elf_gp (isec->owner) = off;
11549
11550 return TRUE;
11551 }
11552
11553 /* Called via elf_link_hash_traverse to merge GOT entries for global
11554 symbol H. */
11555
11556 static bfd_boolean
11557 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11558 {
11559 if (h->root.type == bfd_link_hash_indirect)
11560 return TRUE;
11561
11562 merge_got_entries (&h->got.glist);
11563
11564 return TRUE;
11565 }
11566
11567 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11568 symbol H. */
11569
11570 static bfd_boolean
11571 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11572 {
11573 struct got_entry *gent;
11574
11575 if (h->root.type == bfd_link_hash_indirect)
11576 return TRUE;
11577
11578 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11579 if (!gent->is_indirect)
11580 allocate_got (h, (struct bfd_link_info *) inf, gent);
11581 return TRUE;
11582 }
11583
11584 /* Called on the first multitoc pass after the last call to
11585 ppc64_elf_next_toc_section. This function removes duplicate GOT
11586 entries. */
11587
11588 bfd_boolean
11589 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11590 {
11591 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11592 struct bfd *ibfd, *ibfd2;
11593 bfd_boolean done_something;
11594
11595 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11596
11597 if (!htab->do_multi_toc)
11598 return FALSE;
11599
11600 /* Merge global sym got entries within a toc group. */
11601 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11602
11603 /* And tlsld_got. */
11604 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11605 {
11606 struct got_entry *ent, *ent2;
11607
11608 if (!is_ppc64_elf (ibfd))
11609 continue;
11610
11611 ent = ppc64_tlsld_got (ibfd);
11612 if (!ent->is_indirect
11613 && ent->got.offset != (bfd_vma) -1)
11614 {
11615 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11616 {
11617 if (!is_ppc64_elf (ibfd2))
11618 continue;
11619
11620 ent2 = ppc64_tlsld_got (ibfd2);
11621 if (!ent2->is_indirect
11622 && ent2->got.offset != (bfd_vma) -1
11623 && elf_gp (ibfd2) == elf_gp (ibfd))
11624 {
11625 ent2->is_indirect = TRUE;
11626 ent2->got.ent = ent;
11627 }
11628 }
11629 }
11630 }
11631
11632 /* Zap sizes of got sections. */
11633 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11634 htab->elf.irelplt->size -= htab->got_reli_size;
11635 htab->got_reli_size = 0;
11636
11637 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11638 {
11639 asection *got, *relgot;
11640
11641 if (!is_ppc64_elf (ibfd))
11642 continue;
11643
11644 got = ppc64_elf_tdata (ibfd)->got;
11645 if (got != NULL)
11646 {
11647 got->rawsize = got->size;
11648 got->size = 0;
11649 relgot = ppc64_elf_tdata (ibfd)->relgot;
11650 relgot->rawsize = relgot->size;
11651 relgot->size = 0;
11652 }
11653 }
11654
11655 /* Now reallocate the got, local syms first. We don't need to
11656 allocate section contents again since we never increase size. */
11657 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11658 {
11659 struct got_entry **lgot_ents;
11660 struct got_entry **end_lgot_ents;
11661 struct plt_entry **local_plt;
11662 struct plt_entry **end_local_plt;
11663 unsigned char *lgot_masks;
11664 bfd_size_type locsymcount;
11665 Elf_Internal_Shdr *symtab_hdr;
11666 asection *s;
11667
11668 if (!is_ppc64_elf (ibfd))
11669 continue;
11670
11671 lgot_ents = elf_local_got_ents (ibfd);
11672 if (!lgot_ents)
11673 continue;
11674
11675 symtab_hdr = &elf_symtab_hdr (ibfd);
11676 locsymcount = symtab_hdr->sh_info;
11677 end_lgot_ents = lgot_ents + locsymcount;
11678 local_plt = (struct plt_entry **) end_lgot_ents;
11679 end_local_plt = local_plt + locsymcount;
11680 lgot_masks = (unsigned char *) end_local_plt;
11681 s = ppc64_elf_tdata (ibfd)->got;
11682 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11683 {
11684 struct got_entry *ent;
11685
11686 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11687 {
11688 unsigned int ent_size = 8;
11689 unsigned int rel_size = sizeof (Elf64_External_Rela);
11690
11691 ent->got.offset = s->size;
11692 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11693 {
11694 ent_size *= 2;
11695 rel_size *= 2;
11696 }
11697 s->size += ent_size;
11698 if ((*lgot_masks & PLT_IFUNC) != 0)
11699 {
11700 htab->elf.irelplt->size += rel_size;
11701 htab->got_reli_size += rel_size;
11702 }
11703 else if (bfd_link_pic (info))
11704 {
11705 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11706 srel->size += rel_size;
11707 }
11708 }
11709 }
11710 }
11711
11712 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11713
11714 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11715 {
11716 struct got_entry *ent;
11717
11718 if (!is_ppc64_elf (ibfd))
11719 continue;
11720
11721 ent = ppc64_tlsld_got (ibfd);
11722 if (!ent->is_indirect
11723 && ent->got.offset != (bfd_vma) -1)
11724 {
11725 asection *s = ppc64_elf_tdata (ibfd)->got;
11726 ent->got.offset = s->size;
11727 s->size += 16;
11728 if (bfd_link_pic (info))
11729 {
11730 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11731 srel->size += sizeof (Elf64_External_Rela);
11732 }
11733 }
11734 }
11735
11736 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11737 if (!done_something)
11738 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11739 {
11740 asection *got;
11741
11742 if (!is_ppc64_elf (ibfd))
11743 continue;
11744
11745 got = ppc64_elf_tdata (ibfd)->got;
11746 if (got != NULL)
11747 {
11748 done_something = got->rawsize != got->size;
11749 if (done_something)
11750 break;
11751 }
11752 }
11753
11754 if (done_something)
11755 (*htab->params->layout_sections_again) ();
11756
11757 /* Set up for second pass over toc sections to recalculate elf_gp
11758 on input sections. */
11759 htab->toc_bfd = NULL;
11760 htab->toc_first_sec = NULL;
11761 htab->second_toc_pass = TRUE;
11762 return done_something;
11763 }
11764
11765 /* Called after second pass of multitoc partitioning. */
11766
11767 void
11768 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11769 {
11770 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11771
11772 /* After the second pass, toc_curr tracks the TOC offset used
11773 for code sections below in ppc64_elf_next_input_section. */
11774 htab->toc_curr = TOC_BASE_OFF;
11775 }
11776
11777 /* No toc references were found in ISEC. If the code in ISEC makes no
11778 calls, then there's no need to use toc adjusting stubs when branching
11779 into ISEC. Actually, indirect calls from ISEC are OK as they will
11780 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11781 needed, and 2 if a cyclical call-graph was found but no other reason
11782 for a stub was detected. If called from the top level, a return of
11783 2 means the same as a return of 0. */
11784
11785 static int
11786 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11787 {
11788 int ret;
11789
11790 /* Mark this section as checked. */
11791 isec->call_check_done = 1;
11792
11793 /* We know none of our code bearing sections will need toc stubs. */
11794 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11795 return 0;
11796
11797 if (isec->size == 0)
11798 return 0;
11799
11800 if (isec->output_section == NULL)
11801 return 0;
11802
11803 ret = 0;
11804 if (isec->reloc_count != 0)
11805 {
11806 Elf_Internal_Rela *relstart, *rel;
11807 Elf_Internal_Sym *local_syms;
11808 struct ppc_link_hash_table *htab;
11809
11810 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11811 info->keep_memory);
11812 if (relstart == NULL)
11813 return -1;
11814
11815 /* Look for branches to outside of this section. */
11816 local_syms = NULL;
11817 htab = ppc_hash_table (info);
11818 if (htab == NULL)
11819 return -1;
11820
11821 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11822 {
11823 enum elf_ppc64_reloc_type r_type;
11824 unsigned long r_symndx;
11825 struct elf_link_hash_entry *h;
11826 struct ppc_link_hash_entry *eh;
11827 Elf_Internal_Sym *sym;
11828 asection *sym_sec;
11829 struct _opd_sec_data *opd;
11830 bfd_vma sym_value;
11831 bfd_vma dest;
11832
11833 r_type = ELF64_R_TYPE (rel->r_info);
11834 if (r_type != R_PPC64_REL24
11835 && r_type != R_PPC64_REL14
11836 && r_type != R_PPC64_REL14_BRTAKEN
11837 && r_type != R_PPC64_REL14_BRNTAKEN)
11838 continue;
11839
11840 r_symndx = ELF64_R_SYM (rel->r_info);
11841 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11842 isec->owner))
11843 {
11844 ret = -1;
11845 break;
11846 }
11847
11848 /* Calls to dynamic lib functions go through a plt call stub
11849 that uses r2. */
11850 eh = (struct ppc_link_hash_entry *) h;
11851 if (eh != NULL
11852 && (eh->elf.plt.plist != NULL
11853 || (eh->oh != NULL
11854 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11855 {
11856 ret = 1;
11857 break;
11858 }
11859
11860 if (sym_sec == NULL)
11861 /* Ignore other undefined symbols. */
11862 continue;
11863
11864 /* Assume branches to other sections not included in the
11865 link need stubs too, to cover -R and absolute syms. */
11866 if (sym_sec->output_section == NULL)
11867 {
11868 ret = 1;
11869 break;
11870 }
11871
11872 if (h == NULL)
11873 sym_value = sym->st_value;
11874 else
11875 {
11876 if (h->root.type != bfd_link_hash_defined
11877 && h->root.type != bfd_link_hash_defweak)
11878 abort ();
11879 sym_value = h->root.u.def.value;
11880 }
11881 sym_value += rel->r_addend;
11882
11883 /* If this branch reloc uses an opd sym, find the code section. */
11884 opd = get_opd_info (sym_sec);
11885 if (opd != NULL)
11886 {
11887 if (h == NULL && opd->adjust != NULL)
11888 {
11889 long adjust;
11890
11891 adjust = opd->adjust[OPD_NDX (sym_value)];
11892 if (adjust == -1)
11893 /* Assume deleted functions won't ever be called. */
11894 continue;
11895 sym_value += adjust;
11896 }
11897
11898 dest = opd_entry_value (sym_sec, sym_value,
11899 &sym_sec, NULL, FALSE);
11900 if (dest == (bfd_vma) -1)
11901 continue;
11902 }
11903 else
11904 dest = (sym_value
11905 + sym_sec->output_offset
11906 + sym_sec->output_section->vma);
11907
11908 /* Ignore branch to self. */
11909 if (sym_sec == isec)
11910 continue;
11911
11912 /* If the called function uses the toc, we need a stub. */
11913 if (sym_sec->has_toc_reloc
11914 || sym_sec->makes_toc_func_call)
11915 {
11916 ret = 1;
11917 break;
11918 }
11919
11920 /* Assume any branch that needs a long branch stub might in fact
11921 need a plt_branch stub. A plt_branch stub uses r2. */
11922 else if (dest - (isec->output_offset
11923 + isec->output_section->vma
11924 + rel->r_offset) + (1 << 25)
11925 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11926 ? h->other
11927 : sym->st_other))
11928 {
11929 ret = 1;
11930 break;
11931 }
11932
11933 /* If calling back to a section in the process of being
11934 tested, we can't say for sure that no toc adjusting stubs
11935 are needed, so don't return zero. */
11936 else if (sym_sec->call_check_in_progress)
11937 ret = 2;
11938
11939 /* Branches to another section that itself doesn't have any TOC
11940 references are OK. Recursively call ourselves to check. */
11941 else if (!sym_sec->call_check_done)
11942 {
11943 int recur;
11944
11945 /* Mark current section as indeterminate, so that other
11946 sections that call back to current won't be marked as
11947 known. */
11948 isec->call_check_in_progress = 1;
11949 recur = toc_adjusting_stub_needed (info, sym_sec);
11950 isec->call_check_in_progress = 0;
11951
11952 if (recur != 0)
11953 {
11954 ret = recur;
11955 if (recur != 2)
11956 break;
11957 }
11958 }
11959 }
11960
11961 if (local_syms != NULL
11962 && (elf_symtab_hdr (isec->owner).contents
11963 != (unsigned char *) local_syms))
11964 free (local_syms);
11965 if (elf_section_data (isec)->relocs != relstart)
11966 free (relstart);
11967 }
11968
11969 if ((ret & 1) == 0
11970 && isec->map_head.s != NULL
11971 && (strcmp (isec->output_section->name, ".init") == 0
11972 || strcmp (isec->output_section->name, ".fini") == 0))
11973 {
11974 if (isec->map_head.s->has_toc_reloc
11975 || isec->map_head.s->makes_toc_func_call)
11976 ret = 1;
11977 else if (!isec->map_head.s->call_check_done)
11978 {
11979 int recur;
11980 isec->call_check_in_progress = 1;
11981 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11982 isec->call_check_in_progress = 0;
11983 if (recur != 0)
11984 ret = recur;
11985 }
11986 }
11987
11988 if (ret == 1)
11989 isec->makes_toc_func_call = 1;
11990
11991 return ret;
11992 }
11993
11994 /* The linker repeatedly calls this function for each input section,
11995 in the order that input sections are linked into output sections.
11996 Build lists of input sections to determine groupings between which
11997 we may insert linker stubs. */
11998
11999 bfd_boolean
12000 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12001 {
12002 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12003
12004 if (htab == NULL)
12005 return FALSE;
12006
12007 if ((isec->output_section->flags & SEC_CODE) != 0
12008 && isec->output_section->id < htab->sec_info_arr_size)
12009 {
12010 /* This happens to make the list in reverse order,
12011 which is what we want. */
12012 htab->sec_info[isec->id].u.list
12013 = htab->sec_info[isec->output_section->id].u.list;
12014 htab->sec_info[isec->output_section->id].u.list = isec;
12015 }
12016
12017 if (htab->multi_toc_needed)
12018 {
12019 /* Analyse sections that aren't already flagged as needing a
12020 valid toc pointer. Exclude .fixup for the linux kernel.
12021 .fixup contains branches, but only back to the function that
12022 hit an exception. */
12023 if (!(isec->has_toc_reloc
12024 || (isec->flags & SEC_CODE) == 0
12025 || strcmp (isec->name, ".fixup") == 0
12026 || isec->call_check_done))
12027 {
12028 if (toc_adjusting_stub_needed (info, isec) < 0)
12029 return FALSE;
12030 }
12031 /* Make all sections use the TOC assigned for this object file.
12032 This will be wrong for pasted sections; We fix that in
12033 check_pasted_section(). */
12034 if (elf_gp (isec->owner) != 0)
12035 htab->toc_curr = elf_gp (isec->owner);
12036 }
12037
12038 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12039 return TRUE;
12040 }
12041
12042 /* Check that all .init and .fini sections use the same toc, if they
12043 have toc relocs. */
12044
12045 static bfd_boolean
12046 check_pasted_section (struct bfd_link_info *info, const char *name)
12047 {
12048 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12049
12050 if (o != NULL)
12051 {
12052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12053 bfd_vma toc_off = 0;
12054 asection *i;
12055
12056 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12057 if (i->has_toc_reloc)
12058 {
12059 if (toc_off == 0)
12060 toc_off = htab->sec_info[i->id].toc_off;
12061 else if (toc_off != htab->sec_info[i->id].toc_off)
12062 return FALSE;
12063 }
12064
12065 if (toc_off == 0)
12066 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12067 if (i->makes_toc_func_call)
12068 {
12069 toc_off = htab->sec_info[i->id].toc_off;
12070 break;
12071 }
12072
12073 /* Make sure the whole pasted function uses the same toc offset. */
12074 if (toc_off != 0)
12075 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12076 htab->sec_info[i->id].toc_off = toc_off;
12077 }
12078 return TRUE;
12079 }
12080
12081 bfd_boolean
12082 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12083 {
12084 return (check_pasted_section (info, ".init")
12085 & check_pasted_section (info, ".fini"));
12086 }
12087
12088 /* See whether we can group stub sections together. Grouping stub
12089 sections may result in fewer stubs. More importantly, we need to
12090 put all .init* and .fini* stubs at the beginning of the .init or
12091 .fini output sections respectively, because glibc splits the
12092 _init and _fini functions into multiple parts. Putting a stub in
12093 the middle of a function is not a good idea. */
12094
12095 static bfd_boolean
12096 group_sections (struct bfd_link_info *info,
12097 bfd_size_type stub_group_size,
12098 bfd_boolean stubs_always_before_branch)
12099 {
12100 struct ppc_link_hash_table *htab;
12101 asection *osec;
12102 bfd_boolean suppress_size_errors;
12103
12104 htab = ppc_hash_table (info);
12105 if (htab == NULL)
12106 return FALSE;
12107
12108 suppress_size_errors = FALSE;
12109 if (stub_group_size == 1)
12110 {
12111 /* Default values. */
12112 if (stubs_always_before_branch)
12113 stub_group_size = 0x1e00000;
12114 else
12115 stub_group_size = 0x1c00000;
12116 suppress_size_errors = TRUE;
12117 }
12118
12119 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12120 {
12121 asection *tail;
12122
12123 if (osec->id >= htab->sec_info_arr_size)
12124 continue;
12125
12126 tail = htab->sec_info[osec->id].u.list;
12127 while (tail != NULL)
12128 {
12129 asection *curr;
12130 asection *prev;
12131 bfd_size_type total;
12132 bfd_boolean big_sec;
12133 bfd_vma curr_toc;
12134 struct map_stub *group;
12135 bfd_size_type group_size;
12136
12137 curr = tail;
12138 total = tail->size;
12139 group_size = (ppc64_elf_section_data (tail) != NULL
12140 && ppc64_elf_section_data (tail)->has_14bit_branch
12141 ? stub_group_size >> 10 : stub_group_size);
12142
12143 big_sec = total > group_size;
12144 if (big_sec && !suppress_size_errors)
12145 /* xgettext:c-format */
12146 _bfd_error_handler (_("%pB section %pA exceeds stub group size"),
12147 tail->owner, tail);
12148 curr_toc = htab->sec_info[tail->id].toc_off;
12149
12150 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12151 && ((total += curr->output_offset - prev->output_offset)
12152 < (ppc64_elf_section_data (prev) != NULL
12153 && ppc64_elf_section_data (prev)->has_14bit_branch
12154 ? (group_size = stub_group_size >> 10) : group_size))
12155 && htab->sec_info[prev->id].toc_off == curr_toc)
12156 curr = prev;
12157
12158 /* OK, the size from the start of CURR to the end is less
12159 than group_size and thus can be handled by one stub
12160 section. (or the tail section is itself larger than
12161 group_size, in which case we may be toast.) We should
12162 really be keeping track of the total size of stubs added
12163 here, as stubs contribute to the final output section
12164 size. That's a little tricky, and this way will only
12165 break if stubs added make the total size more than 2^25,
12166 ie. for the default stub_group_size, if stubs total more
12167 than 2097152 bytes, or nearly 75000 plt call stubs. */
12168 group = bfd_alloc (curr->owner, sizeof (*group));
12169 if (group == NULL)
12170 return FALSE;
12171 group->link_sec = curr;
12172 group->stub_sec = NULL;
12173 group->needs_save_res = 0;
12174 group->tls_get_addr_opt_bctrl = -1u;
12175 group->next = htab->group;
12176 htab->group = group;
12177 do
12178 {
12179 prev = htab->sec_info[tail->id].u.list;
12180 /* Set up this stub group. */
12181 htab->sec_info[tail->id].u.group = group;
12182 }
12183 while (tail != curr && (tail = prev) != NULL);
12184
12185 /* But wait, there's more! Input sections up to group_size
12186 bytes before the stub section can be handled by it too.
12187 Don't do this if we have a really large section after the
12188 stubs, as adding more stubs increases the chance that
12189 branches may not reach into the stub section. */
12190 if (!stubs_always_before_branch && !big_sec)
12191 {
12192 total = 0;
12193 while (prev != NULL
12194 && ((total += tail->output_offset - prev->output_offset)
12195 < (ppc64_elf_section_data (prev) != NULL
12196 && ppc64_elf_section_data (prev)->has_14bit_branch
12197 ? (group_size = stub_group_size >> 10) : group_size))
12198 && htab->sec_info[prev->id].toc_off == curr_toc)
12199 {
12200 tail = prev;
12201 prev = htab->sec_info[tail->id].u.list;
12202 htab->sec_info[tail->id].u.group = group;
12203 }
12204 }
12205 tail = prev;
12206 }
12207 }
12208 return TRUE;
12209 }
12210
12211 static const unsigned char glink_eh_frame_cie[] =
12212 {
12213 0, 0, 0, 16, /* length. */
12214 0, 0, 0, 0, /* id. */
12215 1, /* CIE version. */
12216 'z', 'R', 0, /* Augmentation string. */
12217 4, /* Code alignment. */
12218 0x78, /* Data alignment. */
12219 65, /* RA reg. */
12220 1, /* Augmentation size. */
12221 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12222 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12223 };
12224
12225 static size_t
12226 stub_eh_frame_size (struct map_stub *group, size_t align)
12227 {
12228 size_t this_size = 17;
12229 if (group->tls_get_addr_opt_bctrl != -1u)
12230 {
12231 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12232 if (to_bctrl < 64)
12233 this_size += 1;
12234 else if (to_bctrl < 256)
12235 this_size += 2;
12236 else if (to_bctrl < 65536)
12237 this_size += 3;
12238 else
12239 this_size += 5;
12240 this_size += 6;
12241 }
12242 this_size = (this_size + align - 1) & -align;
12243 return this_size;
12244 }
12245
12246 /* Stripping output sections is normally done before dynamic section
12247 symbols have been allocated. This function is called later, and
12248 handles cases like htab->brlt which is mapped to its own output
12249 section. */
12250
12251 static void
12252 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12253 {
12254 if (isec->size == 0
12255 && isec->output_section->size == 0
12256 && !(isec->output_section->flags & SEC_KEEP)
12257 && !bfd_section_removed_from_list (info->output_bfd,
12258 isec->output_section)
12259 && elf_section_data (isec->output_section)->dynindx == 0)
12260 {
12261 isec->output_section->flags |= SEC_EXCLUDE;
12262 bfd_section_list_remove (info->output_bfd, isec->output_section);
12263 info->output_bfd->section_count--;
12264 }
12265 }
12266
12267 /* Determine and set the size of the stub section for a final link.
12268
12269 The basic idea here is to examine all the relocations looking for
12270 PC-relative calls to a target that is unreachable with a "bl"
12271 instruction. */
12272
12273 bfd_boolean
12274 ppc64_elf_size_stubs (struct bfd_link_info *info)
12275 {
12276 bfd_size_type stub_group_size;
12277 bfd_boolean stubs_always_before_branch;
12278 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12279
12280 if (htab == NULL)
12281 return FALSE;
12282
12283 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12284 htab->params->plt_thread_safe = 1;
12285 if (!htab->opd_abi)
12286 htab->params->plt_thread_safe = 0;
12287 else if (htab->params->plt_thread_safe == -1)
12288 {
12289 static const char *const thread_starter[] =
12290 {
12291 "pthread_create",
12292 /* libstdc++ */
12293 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12294 /* librt */
12295 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12296 "mq_notify", "create_timer",
12297 /* libanl */
12298 "getaddrinfo_a",
12299 /* libgomp */
12300 "GOMP_parallel",
12301 "GOMP_parallel_start",
12302 "GOMP_parallel_loop_static",
12303 "GOMP_parallel_loop_static_start",
12304 "GOMP_parallel_loop_dynamic",
12305 "GOMP_parallel_loop_dynamic_start",
12306 "GOMP_parallel_loop_guided",
12307 "GOMP_parallel_loop_guided_start",
12308 "GOMP_parallel_loop_runtime",
12309 "GOMP_parallel_loop_runtime_start",
12310 "GOMP_parallel_sections",
12311 "GOMP_parallel_sections_start",
12312 /* libgo */
12313 "__go_go",
12314 };
12315 unsigned i;
12316
12317 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12318 {
12319 struct elf_link_hash_entry *h;
12320 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12321 FALSE, FALSE, TRUE);
12322 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12323 if (htab->params->plt_thread_safe)
12324 break;
12325 }
12326 }
12327 stubs_always_before_branch = htab->params->group_size < 0;
12328 if (htab->params->group_size < 0)
12329 stub_group_size = -htab->params->group_size;
12330 else
12331 stub_group_size = htab->params->group_size;
12332
12333 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12334 return FALSE;
12335
12336 #define STUB_SHRINK_ITER 20
12337 /* Loop until no stubs added. After iteration 20 of this loop we may
12338 exit on a stub section shrinking. This is to break out of a
12339 pathological case where adding stubs on one iteration decreases
12340 section gaps (perhaps due to alignment), which then requires
12341 fewer or smaller stubs on the next iteration. */
12342
12343 while (1)
12344 {
12345 bfd *input_bfd;
12346 unsigned int bfd_indx;
12347 struct map_stub *group;
12348
12349 htab->stub_iteration += 1;
12350
12351 for (input_bfd = info->input_bfds, bfd_indx = 0;
12352 input_bfd != NULL;
12353 input_bfd = input_bfd->link.next, bfd_indx++)
12354 {
12355 Elf_Internal_Shdr *symtab_hdr;
12356 asection *section;
12357 Elf_Internal_Sym *local_syms = NULL;
12358
12359 if (!is_ppc64_elf (input_bfd))
12360 continue;
12361
12362 /* We'll need the symbol table in a second. */
12363 symtab_hdr = &elf_symtab_hdr (input_bfd);
12364 if (symtab_hdr->sh_info == 0)
12365 continue;
12366
12367 /* Walk over each section attached to the input bfd. */
12368 for (section = input_bfd->sections;
12369 section != NULL;
12370 section = section->next)
12371 {
12372 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12373
12374 /* If there aren't any relocs, then there's nothing more
12375 to do. */
12376 if ((section->flags & SEC_RELOC) == 0
12377 || (section->flags & SEC_ALLOC) == 0
12378 || (section->flags & SEC_LOAD) == 0
12379 || (section->flags & SEC_CODE) == 0
12380 || section->reloc_count == 0)
12381 continue;
12382
12383 /* If this section is a link-once section that will be
12384 discarded, then don't create any stubs. */
12385 if (section->output_section == NULL
12386 || section->output_section->owner != info->output_bfd)
12387 continue;
12388
12389 /* Get the relocs. */
12390 internal_relocs
12391 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12392 info->keep_memory);
12393 if (internal_relocs == NULL)
12394 goto error_ret_free_local;
12395
12396 /* Now examine each relocation. */
12397 irela = internal_relocs;
12398 irelaend = irela + section->reloc_count;
12399 for (; irela < irelaend; irela++)
12400 {
12401 enum elf_ppc64_reloc_type r_type;
12402 unsigned int r_indx;
12403 enum ppc_stub_type stub_type;
12404 struct ppc_stub_hash_entry *stub_entry;
12405 asection *sym_sec, *code_sec;
12406 bfd_vma sym_value, code_value;
12407 bfd_vma destination;
12408 unsigned long local_off;
12409 bfd_boolean ok_dest;
12410 struct ppc_link_hash_entry *hash;
12411 struct ppc_link_hash_entry *fdh;
12412 struct elf_link_hash_entry *h;
12413 Elf_Internal_Sym *sym;
12414 char *stub_name;
12415 const asection *id_sec;
12416 struct _opd_sec_data *opd;
12417 struct plt_entry *plt_ent;
12418
12419 r_type = ELF64_R_TYPE (irela->r_info);
12420 r_indx = ELF64_R_SYM (irela->r_info);
12421
12422 if (r_type >= R_PPC64_max)
12423 {
12424 bfd_set_error (bfd_error_bad_value);
12425 goto error_ret_free_internal;
12426 }
12427
12428 /* Only look for stubs on branch instructions. */
12429 if (r_type != R_PPC64_REL24
12430 && r_type != R_PPC64_REL14
12431 && r_type != R_PPC64_REL14_BRTAKEN
12432 && r_type != R_PPC64_REL14_BRNTAKEN)
12433 continue;
12434
12435 /* Now determine the call target, its name, value,
12436 section. */
12437 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12438 r_indx, input_bfd))
12439 goto error_ret_free_internal;
12440 hash = (struct ppc_link_hash_entry *) h;
12441
12442 ok_dest = FALSE;
12443 fdh = NULL;
12444 sym_value = 0;
12445 if (hash == NULL)
12446 {
12447 sym_value = sym->st_value;
12448 if (sym_sec != NULL
12449 && sym_sec->output_section != NULL)
12450 ok_dest = TRUE;
12451 }
12452 else if (hash->elf.root.type == bfd_link_hash_defined
12453 || hash->elf.root.type == bfd_link_hash_defweak)
12454 {
12455 sym_value = hash->elf.root.u.def.value;
12456 if (sym_sec->output_section != NULL)
12457 ok_dest = TRUE;
12458 }
12459 else if (hash->elf.root.type == bfd_link_hash_undefweak
12460 || hash->elf.root.type == bfd_link_hash_undefined)
12461 {
12462 /* Recognise an old ABI func code entry sym, and
12463 use the func descriptor sym instead if it is
12464 defined. */
12465 if (hash->elf.root.root.string[0] == '.'
12466 && hash->oh != NULL)
12467 {
12468 fdh = ppc_follow_link (hash->oh);
12469 if (fdh->elf.root.type == bfd_link_hash_defined
12470 || fdh->elf.root.type == bfd_link_hash_defweak)
12471 {
12472 sym_sec = fdh->elf.root.u.def.section;
12473 sym_value = fdh->elf.root.u.def.value;
12474 if (sym_sec->output_section != NULL)
12475 ok_dest = TRUE;
12476 }
12477 else
12478 fdh = NULL;
12479 }
12480 }
12481 else
12482 {
12483 bfd_set_error (bfd_error_bad_value);
12484 goto error_ret_free_internal;
12485 }
12486
12487 destination = 0;
12488 local_off = 0;
12489 if (ok_dest)
12490 {
12491 sym_value += irela->r_addend;
12492 destination = (sym_value
12493 + sym_sec->output_offset
12494 + sym_sec->output_section->vma);
12495 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12496 ? hash->elf.other
12497 : sym->st_other);
12498 }
12499
12500 code_sec = sym_sec;
12501 code_value = sym_value;
12502 opd = get_opd_info (sym_sec);
12503 if (opd != NULL)
12504 {
12505 bfd_vma dest;
12506
12507 if (hash == NULL && opd->adjust != NULL)
12508 {
12509 long adjust = opd->adjust[OPD_NDX (sym_value)];
12510 if (adjust == -1)
12511 continue;
12512 code_value += adjust;
12513 sym_value += adjust;
12514 }
12515 dest = opd_entry_value (sym_sec, sym_value,
12516 &code_sec, &code_value, FALSE);
12517 if (dest != (bfd_vma) -1)
12518 {
12519 destination = dest;
12520 if (fdh != NULL)
12521 {
12522 /* Fixup old ABI sym to point at code
12523 entry. */
12524 hash->elf.root.type = bfd_link_hash_defweak;
12525 hash->elf.root.u.def.section = code_sec;
12526 hash->elf.root.u.def.value = code_value;
12527 }
12528 }
12529 }
12530
12531 /* Determine what (if any) linker stub is needed. */
12532 plt_ent = NULL;
12533 stub_type = ppc_type_of_stub (section, irela, &hash,
12534 &plt_ent, destination,
12535 local_off);
12536
12537 if (stub_type != ppc_stub_plt_call)
12538 {
12539 /* Check whether we need a TOC adjusting stub.
12540 Since the linker pastes together pieces from
12541 different object files when creating the
12542 _init and _fini functions, it may be that a
12543 call to what looks like a local sym is in
12544 fact a call needing a TOC adjustment. */
12545 if (code_sec != NULL
12546 && code_sec->output_section != NULL
12547 && (htab->sec_info[code_sec->id].toc_off
12548 != htab->sec_info[section->id].toc_off)
12549 && (code_sec->has_toc_reloc
12550 || code_sec->makes_toc_func_call))
12551 stub_type = ppc_stub_long_branch_r2off;
12552 }
12553
12554 if (stub_type == ppc_stub_none)
12555 continue;
12556
12557 /* __tls_get_addr calls might be eliminated. */
12558 if (stub_type != ppc_stub_plt_call
12559 && hash != NULL
12560 && (hash == htab->tls_get_addr
12561 || hash == htab->tls_get_addr_fd)
12562 && section->has_tls_reloc
12563 && irela != internal_relocs)
12564 {
12565 /* Get tls info. */
12566 unsigned char *tls_mask;
12567
12568 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12569 irela - 1, input_bfd))
12570 goto error_ret_free_internal;
12571 if (*tls_mask != 0)
12572 continue;
12573 }
12574
12575 if (stub_type == ppc_stub_plt_call)
12576 {
12577 if (!htab->opd_abi
12578 && htab->params->plt_localentry0 != 0
12579 && is_elfv2_localentry0 (&hash->elf))
12580 htab->has_plt_localentry0 = 1;
12581 else if (irela + 1 < irelaend
12582 && irela[1].r_offset == irela->r_offset + 4
12583 && (ELF64_R_TYPE (irela[1].r_info)
12584 == R_PPC64_TOCSAVE))
12585 {
12586 if (!tocsave_find (htab, INSERT,
12587 &local_syms, irela + 1, input_bfd))
12588 goto error_ret_free_internal;
12589 }
12590 else
12591 stub_type = ppc_stub_plt_call_r2save;
12592 }
12593
12594 /* Support for grouping stub sections. */
12595 id_sec = htab->sec_info[section->id].u.group->link_sec;
12596
12597 /* Get the name of this stub. */
12598 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12599 if (!stub_name)
12600 goto error_ret_free_internal;
12601
12602 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12603 stub_name, FALSE, FALSE);
12604 if (stub_entry != NULL)
12605 {
12606 /* The proper stub has already been created. */
12607 free (stub_name);
12608 if (stub_type == ppc_stub_plt_call_r2save)
12609 stub_entry->stub_type = stub_type;
12610 continue;
12611 }
12612
12613 stub_entry = ppc_add_stub (stub_name, section, info);
12614 if (stub_entry == NULL)
12615 {
12616 free (stub_name);
12617 error_ret_free_internal:
12618 if (elf_section_data (section)->relocs == NULL)
12619 free (internal_relocs);
12620 error_ret_free_local:
12621 if (local_syms != NULL
12622 && (symtab_hdr->contents
12623 != (unsigned char *) local_syms))
12624 free (local_syms);
12625 return FALSE;
12626 }
12627
12628 stub_entry->stub_type = stub_type;
12629 if (stub_type != ppc_stub_plt_call
12630 && stub_type != ppc_stub_plt_call_r2save)
12631 {
12632 stub_entry->target_value = code_value;
12633 stub_entry->target_section = code_sec;
12634 }
12635 else
12636 {
12637 stub_entry->target_value = sym_value;
12638 stub_entry->target_section = sym_sec;
12639 }
12640 stub_entry->h = hash;
12641 stub_entry->plt_ent = plt_ent;
12642 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12643
12644 if (stub_entry->h != NULL)
12645 htab->stub_globals += 1;
12646 }
12647
12648 /* We're done with the internal relocs, free them. */
12649 if (elf_section_data (section)->relocs != internal_relocs)
12650 free (internal_relocs);
12651 }
12652
12653 if (local_syms != NULL
12654 && symtab_hdr->contents != (unsigned char *) local_syms)
12655 {
12656 if (!info->keep_memory)
12657 free (local_syms);
12658 else
12659 symtab_hdr->contents = (unsigned char *) local_syms;
12660 }
12661 }
12662
12663 /* We may have added some stubs. Find out the new size of the
12664 stub sections. */
12665 for (group = htab->group; group != NULL; group = group->next)
12666 if (group->stub_sec != NULL)
12667 {
12668 asection *stub_sec = group->stub_sec;
12669
12670 if (htab->stub_iteration <= STUB_SHRINK_ITER
12671 || stub_sec->rawsize < stub_sec->size)
12672 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12673 stub_sec->rawsize = stub_sec->size;
12674 stub_sec->size = 0;
12675 stub_sec->reloc_count = 0;
12676 stub_sec->flags &= ~SEC_RELOC;
12677 }
12678
12679 if (htab->stub_iteration <= STUB_SHRINK_ITER
12680 || htab->brlt->rawsize < htab->brlt->size)
12681 htab->brlt->rawsize = htab->brlt->size;
12682 htab->brlt->size = 0;
12683 htab->brlt->reloc_count = 0;
12684 htab->brlt->flags &= ~SEC_RELOC;
12685 if (htab->relbrlt != NULL)
12686 htab->relbrlt->size = 0;
12687
12688 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12689
12690 for (group = htab->group; group != NULL; group = group->next)
12691 if (group->needs_save_res)
12692 group->stub_sec->size += htab->sfpr->size;
12693
12694 if (info->emitrelocations
12695 && htab->glink != NULL && htab->glink->size != 0)
12696 {
12697 htab->glink->reloc_count = 1;
12698 htab->glink->flags |= SEC_RELOC;
12699 }
12700
12701 if (htab->glink_eh_frame != NULL
12702 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12703 && htab->glink_eh_frame->output_section->size > 8)
12704 {
12705 size_t size = 0, align = 4;
12706
12707 for (group = htab->group; group != NULL; group = group->next)
12708 if (group->stub_sec != NULL)
12709 size += stub_eh_frame_size (group, align);
12710 if (htab->glink != NULL && htab->glink->size != 0)
12711 size += (24 + align - 1) & -align;
12712 if (size != 0)
12713 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12714 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12715 size = (size + align - 1) & -align;
12716 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12717 htab->glink_eh_frame->size = size;
12718 }
12719
12720 if (htab->params->plt_stub_align != 0)
12721 for (group = htab->group; group != NULL; group = group->next)
12722 if (group->stub_sec != NULL)
12723 {
12724 int align = abs (htab->params->plt_stub_align);
12725 group->stub_sec->size
12726 = (group->stub_sec->size + (1 << align) - 1) & -(1 << align);
12727 }
12728
12729 for (group = htab->group; group != NULL; group = group->next)
12730 if (group->stub_sec != NULL
12731 && group->stub_sec->rawsize != group->stub_sec->size
12732 && (htab->stub_iteration <= STUB_SHRINK_ITER
12733 || group->stub_sec->rawsize < group->stub_sec->size))
12734 break;
12735
12736 if (group == NULL
12737 && (htab->brlt->rawsize == htab->brlt->size
12738 || (htab->stub_iteration > STUB_SHRINK_ITER
12739 && htab->brlt->rawsize > htab->brlt->size))
12740 && (htab->glink_eh_frame == NULL
12741 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12742 break;
12743
12744 /* Ask the linker to do its stuff. */
12745 (*htab->params->layout_sections_again) ();
12746 }
12747
12748 if (htab->glink_eh_frame != NULL
12749 && htab->glink_eh_frame->size != 0)
12750 {
12751 bfd_vma val;
12752 bfd_byte *p, *last_fde;
12753 size_t last_fde_len, size, align, pad;
12754 struct map_stub *group;
12755
12756 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12757 if (p == NULL)
12758 return FALSE;
12759 htab->glink_eh_frame->contents = p;
12760 last_fde = p;
12761 align = 4;
12762
12763 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12764 /* CIE length (rewrite in case little-endian). */
12765 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12766 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12767 p += last_fde_len + 4;
12768
12769 for (group = htab->group; group != NULL; group = group->next)
12770 if (group->stub_sec != NULL)
12771 {
12772 last_fde = p;
12773 last_fde_len = stub_eh_frame_size (group, align) - 4;
12774 /* FDE length. */
12775 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12776 p += 4;
12777 /* CIE pointer. */
12778 val = p - htab->glink_eh_frame->contents;
12779 bfd_put_32 (htab->elf.dynobj, val, p);
12780 p += 4;
12781 /* Offset to stub section, written later. */
12782 p += 4;
12783 /* stub section size. */
12784 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12785 p += 4;
12786 /* Augmentation. */
12787 p += 1;
12788 if (group->tls_get_addr_opt_bctrl != -1u)
12789 {
12790 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12791
12792 /* This FDE needs more than just the default.
12793 Describe __tls_get_addr_opt stub LR. */
12794 if (to_bctrl < 64)
12795 *p++ = DW_CFA_advance_loc + to_bctrl;
12796 else if (to_bctrl < 256)
12797 {
12798 *p++ = DW_CFA_advance_loc1;
12799 *p++ = to_bctrl;
12800 }
12801 else if (to_bctrl < 65536)
12802 {
12803 *p++ = DW_CFA_advance_loc2;
12804 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12805 p += 2;
12806 }
12807 else
12808 {
12809 *p++ = DW_CFA_advance_loc4;
12810 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12811 p += 4;
12812 }
12813 *p++ = DW_CFA_offset_extended_sf;
12814 *p++ = 65;
12815 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12816 *p++ = DW_CFA_advance_loc + 4;
12817 *p++ = DW_CFA_restore_extended;
12818 *p++ = 65;
12819 }
12820 /* Pad. */
12821 p = last_fde + last_fde_len + 4;
12822 }
12823 if (htab->glink != NULL && htab->glink->size != 0)
12824 {
12825 last_fde = p;
12826 last_fde_len = ((24 + align - 1) & -align) - 4;
12827 /* FDE length. */
12828 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12829 p += 4;
12830 /* CIE pointer. */
12831 val = p - htab->glink_eh_frame->contents;
12832 bfd_put_32 (htab->elf.dynobj, val, p);
12833 p += 4;
12834 /* Offset to .glink, written later. */
12835 p += 4;
12836 /* .glink size. */
12837 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12838 p += 4;
12839 /* Augmentation. */
12840 p += 1;
12841
12842 *p++ = DW_CFA_advance_loc + 1;
12843 *p++ = DW_CFA_register;
12844 *p++ = 65;
12845 *p++ = htab->opd_abi ? 12 : 0;
12846 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12847 *p++ = DW_CFA_restore_extended;
12848 *p++ = 65;
12849 p += ((24 + align - 1) & -align) - 24;
12850 }
12851 /* Subsume any padding into the last FDE if user .eh_frame
12852 sections are aligned more than glink_eh_frame. Otherwise any
12853 zero padding will be seen as a terminator. */
12854 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12855 size = p - htab->glink_eh_frame->contents;
12856 pad = ((size + align - 1) & -align) - size;
12857 htab->glink_eh_frame->size = size + pad;
12858 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12859 }
12860
12861 maybe_strip_output (info, htab->brlt);
12862 if (htab->glink_eh_frame != NULL)
12863 maybe_strip_output (info, htab->glink_eh_frame);
12864
12865 return TRUE;
12866 }
12867
12868 /* Called after we have determined section placement. If sections
12869 move, we'll be called again. Provide a value for TOCstart. */
12870
12871 bfd_vma
12872 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12873 {
12874 asection *s;
12875 bfd_vma TOCstart, adjust;
12876
12877 if (info != NULL)
12878 {
12879 struct elf_link_hash_entry *h;
12880 struct elf_link_hash_table *htab = elf_hash_table (info);
12881
12882 if (is_elf_hash_table (htab)
12883 && htab->hgot != NULL)
12884 h = htab->hgot;
12885 else
12886 {
12887 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12888 if (is_elf_hash_table (htab))
12889 htab->hgot = h;
12890 }
12891 if (h != NULL
12892 && h->root.type == bfd_link_hash_defined
12893 && !h->root.linker_def
12894 && (!is_elf_hash_table (htab)
12895 || h->def_regular))
12896 {
12897 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12898 + h->root.u.def.section->output_offset
12899 + h->root.u.def.section->output_section->vma);
12900 _bfd_set_gp_value (obfd, TOCstart);
12901 return TOCstart;
12902 }
12903 }
12904
12905 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12906 order. The TOC starts where the first of these sections starts. */
12907 s = bfd_get_section_by_name (obfd, ".got");
12908 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12909 s = bfd_get_section_by_name (obfd, ".toc");
12910 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12911 s = bfd_get_section_by_name (obfd, ".tocbss");
12912 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12913 s = bfd_get_section_by_name (obfd, ".plt");
12914 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12915 {
12916 /* This may happen for
12917 o references to TOC base (SYM@toc / TOC[tc0]) without a
12918 .toc directive
12919 o bad linker script
12920 o --gc-sections and empty TOC sections
12921
12922 FIXME: Warn user? */
12923
12924 /* Look for a likely section. We probably won't even be
12925 using TOCstart. */
12926 for (s = obfd->sections; s != NULL; s = s->next)
12927 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12928 | SEC_EXCLUDE))
12929 == (SEC_ALLOC | SEC_SMALL_DATA))
12930 break;
12931 if (s == NULL)
12932 for (s = obfd->sections; s != NULL; s = s->next)
12933 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12934 == (SEC_ALLOC | SEC_SMALL_DATA))
12935 break;
12936 if (s == NULL)
12937 for (s = obfd->sections; s != NULL; s = s->next)
12938 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12939 == SEC_ALLOC)
12940 break;
12941 if (s == NULL)
12942 for (s = obfd->sections; s != NULL; s = s->next)
12943 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12944 break;
12945 }
12946
12947 TOCstart = 0;
12948 if (s != NULL)
12949 TOCstart = s->output_section->vma + s->output_offset;
12950
12951 /* Force alignment. */
12952 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12953 TOCstart -= adjust;
12954 _bfd_set_gp_value (obfd, TOCstart);
12955
12956 if (info != NULL && s != NULL)
12957 {
12958 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12959
12960 if (htab != NULL)
12961 {
12962 if (htab->elf.hgot != NULL)
12963 {
12964 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12965 htab->elf.hgot->root.u.def.section = s;
12966 }
12967 }
12968 else
12969 {
12970 struct bfd_link_hash_entry *bh = NULL;
12971 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12972 s, TOC_BASE_OFF - adjust,
12973 NULL, FALSE, FALSE, &bh);
12974 }
12975 }
12976 return TOCstart;
12977 }
12978
12979 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12980 write out any global entry stubs. */
12981
12982 static bfd_boolean
12983 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12984 {
12985 struct bfd_link_info *info;
12986 struct ppc_link_hash_table *htab;
12987 struct plt_entry *pent;
12988 asection *s;
12989
12990 if (h->root.type == bfd_link_hash_indirect)
12991 return TRUE;
12992
12993 if (!h->pointer_equality_needed)
12994 return TRUE;
12995
12996 if (h->def_regular)
12997 return TRUE;
12998
12999 info = inf;
13000 htab = ppc_hash_table (info);
13001 if (htab == NULL)
13002 return FALSE;
13003
13004 s = htab->global_entry;
13005 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13006 if (pent->plt.offset != (bfd_vma) -1
13007 && pent->addend == 0)
13008 {
13009 bfd_byte *p;
13010 asection *plt;
13011 bfd_vma off;
13012
13013 p = s->contents + h->root.u.def.value;
13014 plt = htab->elf.splt;
13015 if (!htab->elf.dynamic_sections_created
13016 || h->dynindx == -1)
13017 plt = htab->elf.iplt;
13018 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13019 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13020
13021 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13022 {
13023 info->callbacks->einfo
13024 (_("%P: linkage table error against `%pT'\n"),
13025 h->root.root.string);
13026 bfd_set_error (bfd_error_bad_value);
13027 htab->stub_error = TRUE;
13028 }
13029
13030 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13031 if (htab->params->emit_stub_syms)
13032 {
13033 size_t len = strlen (h->root.root.string);
13034 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13035
13036 if (name == NULL)
13037 return FALSE;
13038
13039 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13040 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13041 if (h == NULL)
13042 return FALSE;
13043 if (h->root.type == bfd_link_hash_new)
13044 {
13045 h->root.type = bfd_link_hash_defined;
13046 h->root.u.def.section = s;
13047 h->root.u.def.value = p - s->contents;
13048 h->ref_regular = 1;
13049 h->def_regular = 1;
13050 h->ref_regular_nonweak = 1;
13051 h->forced_local = 1;
13052 h->non_elf = 0;
13053 h->root.linker_def = 1;
13054 }
13055 }
13056
13057 if (PPC_HA (off) != 0)
13058 {
13059 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13060 p += 4;
13061 }
13062 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13063 p += 4;
13064 bfd_put_32 (s->owner, MTCTR_R12, p);
13065 p += 4;
13066 bfd_put_32 (s->owner, BCTR, p);
13067 break;
13068 }
13069 return TRUE;
13070 }
13071
13072 /* Build all the stubs associated with the current output file.
13073 The stubs are kept in a hash table attached to the main linker
13074 hash table. This function is called via gldelf64ppc_finish. */
13075
13076 bfd_boolean
13077 ppc64_elf_build_stubs (struct bfd_link_info *info,
13078 char **stats)
13079 {
13080 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13081 struct map_stub *group;
13082 asection *stub_sec;
13083 bfd_byte *p;
13084 int stub_sec_count = 0;
13085
13086 if (htab == NULL)
13087 return FALSE;
13088
13089 /* Allocate memory to hold the linker stubs. */
13090 for (group = htab->group; group != NULL; group = group->next)
13091 if ((stub_sec = group->stub_sec) != NULL
13092 && stub_sec->size != 0)
13093 {
13094 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13095 if (stub_sec->contents == NULL)
13096 return FALSE;
13097 stub_sec->size = 0;
13098 }
13099
13100 if (htab->glink != NULL && htab->glink->size != 0)
13101 {
13102 unsigned int indx;
13103 bfd_vma plt0;
13104
13105 /* Build the .glink plt call stub. */
13106 if (htab->params->emit_stub_syms)
13107 {
13108 struct elf_link_hash_entry *h;
13109 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13110 TRUE, FALSE, FALSE);
13111 if (h == NULL)
13112 return FALSE;
13113 if (h->root.type == bfd_link_hash_new)
13114 {
13115 h->root.type = bfd_link_hash_defined;
13116 h->root.u.def.section = htab->glink;
13117 h->root.u.def.value = 8;
13118 h->ref_regular = 1;
13119 h->def_regular = 1;
13120 h->ref_regular_nonweak = 1;
13121 h->forced_local = 1;
13122 h->non_elf = 0;
13123 h->root.linker_def = 1;
13124 }
13125 }
13126 plt0 = (htab->elf.splt->output_section->vma
13127 + htab->elf.splt->output_offset
13128 - 16);
13129 if (info->emitrelocations)
13130 {
13131 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13132 if (r == NULL)
13133 return FALSE;
13134 r->r_offset = (htab->glink->output_offset
13135 + htab->glink->output_section->vma);
13136 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13137 r->r_addend = plt0;
13138 }
13139 p = htab->glink->contents;
13140 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13141 bfd_put_64 (htab->glink->owner, plt0, p);
13142 p += 8;
13143 if (htab->opd_abi)
13144 {
13145 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13146 p += 4;
13147 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13148 p += 4;
13149 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13150 p += 4;
13151 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13152 p += 4;
13153 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13154 p += 4;
13155 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13156 p += 4;
13157 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13158 p += 4;
13159 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13160 p += 4;
13161 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13162 p += 4;
13163 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13164 p += 4;
13165 }
13166 else
13167 {
13168 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13169 p += 4;
13170 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13171 p += 4;
13172 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13173 p += 4;
13174 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13175 p += 4;
13176 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13177 p += 4;
13178 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13179 p += 4;
13180 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13181 p += 4;
13182 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13183 p += 4;
13184 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13185 p += 4;
13186 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13187 p += 4;
13188 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13189 p += 4;
13190 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13191 p += 4;
13192 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13193 p += 4;
13194 }
13195 bfd_put_32 (htab->glink->owner, BCTR, p);
13196 p += 4;
13197 BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab));
13198
13199 /* Build the .glink lazy link call stubs. */
13200 indx = 0;
13201 while (p < htab->glink->contents + htab->glink->size)
13202 {
13203 if (htab->opd_abi)
13204 {
13205 if (indx < 0x8000)
13206 {
13207 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13208 p += 4;
13209 }
13210 else
13211 {
13212 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13213 p += 4;
13214 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13215 p);
13216 p += 4;
13217 }
13218 }
13219 bfd_put_32 (htab->glink->owner,
13220 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13221 indx++;
13222 p += 4;
13223 }
13224 }
13225
13226 /* Build .glink global entry stubs. */
13227 if (htab->global_entry != NULL && htab->global_entry->size != 0)
13228 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13229
13230 if (htab->brlt != NULL && htab->brlt->size != 0)
13231 {
13232 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13233 htab->brlt->size);
13234 if (htab->brlt->contents == NULL)
13235 return FALSE;
13236 }
13237 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13238 {
13239 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13240 htab->relbrlt->size);
13241 if (htab->relbrlt->contents == NULL)
13242 return FALSE;
13243 }
13244
13245 /* Build the stubs as directed by the stub hash table. */
13246 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13247
13248 for (group = htab->group; group != NULL; group = group->next)
13249 if (group->needs_save_res)
13250 group->stub_sec->size += htab->sfpr->size;
13251
13252 if (htab->relbrlt != NULL)
13253 htab->relbrlt->reloc_count = 0;
13254
13255 if (htab->params->plt_stub_align != 0)
13256 for (group = htab->group; group != NULL; group = group->next)
13257 if ((stub_sec = group->stub_sec) != NULL)
13258 {
13259 int align = abs (htab->params->plt_stub_align);
13260 stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align);
13261 }
13262
13263 for (group = htab->group; group != NULL; group = group->next)
13264 if (group->needs_save_res)
13265 {
13266 stub_sec = group->stub_sec;
13267 memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
13268 htab->sfpr->contents, htab->sfpr->size);
13269 if (htab->params->emit_stub_syms)
13270 {
13271 unsigned int i;
13272
13273 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13274 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13275 return FALSE;
13276 }
13277 }
13278
13279 for (group = htab->group; group != NULL; group = group->next)
13280 if ((stub_sec = group->stub_sec) != NULL)
13281 {
13282 stub_sec_count += 1;
13283 if (stub_sec->rawsize != stub_sec->size
13284 && (htab->stub_iteration <= STUB_SHRINK_ITER
13285 || stub_sec->rawsize < stub_sec->size))
13286 break;
13287 }
13288
13289 if (group != NULL)
13290 {
13291 htab->stub_error = TRUE;
13292 _bfd_error_handler (_("stubs don't match calculated size"));
13293 }
13294
13295 if (htab->stub_error)
13296 return FALSE;
13297
13298 if (stats != NULL)
13299 {
13300 size_t len;
13301 *stats = bfd_malloc (500);
13302 if (*stats == NULL)
13303 return FALSE;
13304
13305 len = sprintf (*stats,
13306 ngettext ("linker stubs in %u group\n",
13307 "linker stubs in %u groups\n",
13308 stub_sec_count),
13309 stub_sec_count);
13310 sprintf (*stats + len, _(" branch %lu\n"
13311 " toc adjust %lu\n"
13312 " long branch %lu\n"
13313 " long toc adj %lu\n"
13314 " plt call %lu\n"
13315 " plt call toc %lu\n"
13316 " global entry %lu"),
13317 htab->stub_count[ppc_stub_long_branch - 1],
13318 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13319 htab->stub_count[ppc_stub_plt_branch - 1],
13320 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13321 htab->stub_count[ppc_stub_plt_call - 1],
13322 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13323 htab->stub_count[ppc_stub_global_entry - 1]);
13324 }
13325 return TRUE;
13326 }
13327
13328 /* What to do when ld finds relocations against symbols defined in
13329 discarded sections. */
13330
13331 static unsigned int
13332 ppc64_elf_action_discarded (asection *sec)
13333 {
13334 if (strcmp (".opd", sec->name) == 0)
13335 return 0;
13336
13337 if (strcmp (".toc", sec->name) == 0)
13338 return 0;
13339
13340 if (strcmp (".toc1", sec->name) == 0)
13341 return 0;
13342
13343 return _bfd_elf_default_action_discarded (sec);
13344 }
13345
13346 /* The RELOCATE_SECTION function is called by the ELF backend linker
13347 to handle the relocations for a section.
13348
13349 The relocs are always passed as Rela structures; if the section
13350 actually uses Rel structures, the r_addend field will always be
13351 zero.
13352
13353 This function is responsible for adjust the section contents as
13354 necessary, and (if using Rela relocs and generating a
13355 relocatable output file) adjusting the reloc addend as
13356 necessary.
13357
13358 This function does not have to worry about setting the reloc
13359 address or the reloc symbol index.
13360
13361 LOCAL_SYMS is a pointer to the swapped in local symbols.
13362
13363 LOCAL_SECTIONS is an array giving the section in the input file
13364 corresponding to the st_shndx field of each local symbol.
13365
13366 The global hash table entry for the global symbols can be found
13367 via elf_sym_hashes (input_bfd).
13368
13369 When generating relocatable output, this function must handle
13370 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13371 going to be the section symbol corresponding to the output
13372 section, which means that the addend must be adjusted
13373 accordingly. */
13374
13375 static bfd_boolean
13376 ppc64_elf_relocate_section (bfd *output_bfd,
13377 struct bfd_link_info *info,
13378 bfd *input_bfd,
13379 asection *input_section,
13380 bfd_byte *contents,
13381 Elf_Internal_Rela *relocs,
13382 Elf_Internal_Sym *local_syms,
13383 asection **local_sections)
13384 {
13385 struct ppc_link_hash_table *htab;
13386 Elf_Internal_Shdr *symtab_hdr;
13387 struct elf_link_hash_entry **sym_hashes;
13388 Elf_Internal_Rela *rel;
13389 Elf_Internal_Rela *wrel;
13390 Elf_Internal_Rela *relend;
13391 Elf_Internal_Rela outrel;
13392 bfd_byte *loc;
13393 struct got_entry **local_got_ents;
13394 bfd_vma TOCstart;
13395 bfd_boolean ret = TRUE;
13396 bfd_boolean is_opd;
13397 /* Assume 'at' branch hints. */
13398 bfd_boolean is_isa_v2 = TRUE;
13399 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13400
13401 /* Initialize howto table if needed. */
13402 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13403 ppc_howto_init ();
13404
13405 htab = ppc_hash_table (info);
13406 if (htab == NULL)
13407 return FALSE;
13408
13409 /* Don't relocate stub sections. */
13410 if (input_section->owner == htab->params->stub_bfd)
13411 return TRUE;
13412
13413 BFD_ASSERT (is_ppc64_elf (input_bfd));
13414
13415 local_got_ents = elf_local_got_ents (input_bfd);
13416 TOCstart = elf_gp (output_bfd);
13417 symtab_hdr = &elf_symtab_hdr (input_bfd);
13418 sym_hashes = elf_sym_hashes (input_bfd);
13419 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13420
13421 rel = wrel = relocs;
13422 relend = relocs + input_section->reloc_count;
13423 for (; rel < relend; wrel++, rel++)
13424 {
13425 enum elf_ppc64_reloc_type r_type;
13426 bfd_vma addend;
13427 bfd_reloc_status_type r;
13428 Elf_Internal_Sym *sym;
13429 asection *sec;
13430 struct elf_link_hash_entry *h_elf;
13431 struct ppc_link_hash_entry *h;
13432 struct ppc_link_hash_entry *fdh;
13433 const char *sym_name;
13434 unsigned long r_symndx, toc_symndx;
13435 bfd_vma toc_addend;
13436 unsigned char tls_mask, tls_gd, tls_type;
13437 unsigned char sym_type;
13438 bfd_vma relocation;
13439 bfd_boolean unresolved_reloc;
13440 bfd_boolean warned;
13441 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13442 unsigned int insn;
13443 unsigned int mask;
13444 struct ppc_stub_hash_entry *stub_entry;
13445 bfd_vma max_br_offset;
13446 bfd_vma from;
13447 Elf_Internal_Rela orig_rel;
13448 reloc_howto_type *howto;
13449 struct reloc_howto_struct alt_howto;
13450
13451 again:
13452 orig_rel = *rel;
13453
13454 r_type = ELF64_R_TYPE (rel->r_info);
13455 r_symndx = ELF64_R_SYM (rel->r_info);
13456
13457 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13458 symbol of the previous ADDR64 reloc. The symbol gives us the
13459 proper TOC base to use. */
13460 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13461 && wrel != relocs
13462 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13463 && is_opd)
13464 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13465
13466 sym = NULL;
13467 sec = NULL;
13468 h_elf = NULL;
13469 sym_name = NULL;
13470 unresolved_reloc = FALSE;
13471 warned = FALSE;
13472
13473 if (r_symndx < symtab_hdr->sh_info)
13474 {
13475 /* It's a local symbol. */
13476 struct _opd_sec_data *opd;
13477
13478 sym = local_syms + r_symndx;
13479 sec = local_sections[r_symndx];
13480 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13481 sym_type = ELF64_ST_TYPE (sym->st_info);
13482 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13483 opd = get_opd_info (sec);
13484 if (opd != NULL && opd->adjust != NULL)
13485 {
13486 long adjust = opd->adjust[OPD_NDX (sym->st_value
13487 + rel->r_addend)];
13488 if (adjust == -1)
13489 relocation = 0;
13490 else
13491 {
13492 /* If this is a relocation against the opd section sym
13493 and we have edited .opd, adjust the reloc addend so
13494 that ld -r and ld --emit-relocs output is correct.
13495 If it is a reloc against some other .opd symbol,
13496 then the symbol value will be adjusted later. */
13497 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13498 rel->r_addend += adjust;
13499 else
13500 relocation += adjust;
13501 }
13502 }
13503 }
13504 else
13505 {
13506 bfd_boolean ignored;
13507
13508 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13509 r_symndx, symtab_hdr, sym_hashes,
13510 h_elf, sec, relocation,
13511 unresolved_reloc, warned, ignored);
13512 sym_name = h_elf->root.root.string;
13513 sym_type = h_elf->type;
13514 if (sec != NULL
13515 && sec->owner == output_bfd
13516 && strcmp (sec->name, ".opd") == 0)
13517 {
13518 /* This is a symbol defined in a linker script. All
13519 such are defined in output sections, even those
13520 defined by simple assignment from a symbol defined in
13521 an input section. Transfer the symbol to an
13522 appropriate input .opd section, so that a branch to
13523 this symbol will be mapped to the location specified
13524 by the opd entry. */
13525 struct bfd_link_order *lo;
13526 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13527 if (lo->type == bfd_indirect_link_order)
13528 {
13529 asection *isec = lo->u.indirect.section;
13530 if (h_elf->root.u.def.value >= isec->output_offset
13531 && h_elf->root.u.def.value < (isec->output_offset
13532 + isec->size))
13533 {
13534 h_elf->root.u.def.value -= isec->output_offset;
13535 h_elf->root.u.def.section = isec;
13536 sec = isec;
13537 break;
13538 }
13539 }
13540 }
13541 }
13542 h = (struct ppc_link_hash_entry *) h_elf;
13543
13544 if (sec != NULL && discarded_section (sec))
13545 {
13546 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13547 input_bfd, input_section,
13548 contents + rel->r_offset);
13549 wrel->r_offset = rel->r_offset;
13550 wrel->r_info = 0;
13551 wrel->r_addend = 0;
13552
13553 /* For ld -r, remove relocations in debug sections against
13554 symbols defined in discarded sections. Not done for
13555 non-debug to preserve relocs in .eh_frame which the
13556 eh_frame editing code expects to be present. */
13557 if (bfd_link_relocatable (info)
13558 && (input_section->flags & SEC_DEBUGGING))
13559 wrel--;
13560
13561 continue;
13562 }
13563
13564 if (bfd_link_relocatable (info))
13565 goto copy_reloc;
13566
13567 if (h != NULL && &h->elf == htab->elf.hgot)
13568 {
13569 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13570 sec = bfd_abs_section_ptr;
13571 unresolved_reloc = FALSE;
13572 }
13573
13574 /* TLS optimizations. Replace instruction sequences and relocs
13575 based on information we collected in tls_optimize. We edit
13576 RELOCS so that --emit-relocs will output something sensible
13577 for the final instruction stream. */
13578 tls_mask = 0;
13579 tls_gd = 0;
13580 toc_symndx = 0;
13581 if (h != NULL)
13582 tls_mask = h->tls_mask;
13583 else if (local_got_ents != NULL)
13584 {
13585 struct plt_entry **local_plt = (struct plt_entry **)
13586 (local_got_ents + symtab_hdr->sh_info);
13587 unsigned char *lgot_masks = (unsigned char *)
13588 (local_plt + symtab_hdr->sh_info);
13589 tls_mask = lgot_masks[r_symndx];
13590 }
13591 if (tls_mask == 0
13592 && (r_type == R_PPC64_TLS
13593 || r_type == R_PPC64_TLSGD
13594 || r_type == R_PPC64_TLSLD))
13595 {
13596 /* Check for toc tls entries. */
13597 unsigned char *toc_tls;
13598
13599 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13600 &local_syms, rel, input_bfd))
13601 return FALSE;
13602
13603 if (toc_tls)
13604 tls_mask = *toc_tls;
13605 }
13606
13607 /* Check that tls relocs are used with tls syms, and non-tls
13608 relocs are used with non-tls syms. */
13609 if (r_symndx != STN_UNDEF
13610 && r_type != R_PPC64_NONE
13611 && (h == NULL
13612 || h->elf.root.type == bfd_link_hash_defined
13613 || h->elf.root.type == bfd_link_hash_defweak)
13614 && (IS_PPC64_TLS_RELOC (r_type)
13615 != (sym_type == STT_TLS
13616 || (sym_type == STT_SECTION
13617 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13618 {
13619 if (tls_mask != 0
13620 && (r_type == R_PPC64_TLS
13621 || r_type == R_PPC64_TLSGD
13622 || r_type == R_PPC64_TLSLD))
13623 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13624 ;
13625 else
13626 info->callbacks->einfo
13627 (!IS_PPC64_TLS_RELOC (r_type)
13628 /* xgettext:c-format */
13629 ? _("%H: %s used with TLS symbol `%pT'\n")
13630 /* xgettext:c-format */
13631 : _("%H: %s used with non-TLS symbol `%pT'\n"),
13632 input_bfd, input_section, rel->r_offset,
13633 ppc64_elf_howto_table[r_type]->name,
13634 sym_name);
13635 }
13636
13637 /* Ensure reloc mapping code below stays sane. */
13638 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13639 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13640 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13641 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13642 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13643 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13644 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13645 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13646 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13647 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13648 abort ();
13649
13650 switch (r_type)
13651 {
13652 default:
13653 break;
13654
13655 case R_PPC64_LO_DS_OPT:
13656 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13657 if ((insn & (0x3f << 26)) != 58u << 26)
13658 abort ();
13659 insn += (14u << 26) - (58u << 26);
13660 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13661 r_type = R_PPC64_TOC16_LO;
13662 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13663 break;
13664
13665 case R_PPC64_TOC16:
13666 case R_PPC64_TOC16_LO:
13667 case R_PPC64_TOC16_DS:
13668 case R_PPC64_TOC16_LO_DS:
13669 {
13670 /* Check for toc tls entries. */
13671 unsigned char *toc_tls;
13672 int retval;
13673
13674 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13675 &local_syms, rel, input_bfd);
13676 if (retval == 0)
13677 return FALSE;
13678
13679 if (toc_tls)
13680 {
13681 tls_mask = *toc_tls;
13682 if (r_type == R_PPC64_TOC16_DS
13683 || r_type == R_PPC64_TOC16_LO_DS)
13684 {
13685 if (tls_mask != 0
13686 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13687 goto toctprel;
13688 }
13689 else
13690 {
13691 /* If we found a GD reloc pair, then we might be
13692 doing a GD->IE transition. */
13693 if (retval == 2)
13694 {
13695 tls_gd = TLS_TPRELGD;
13696 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13697 goto tls_ldgd_opt;
13698 }
13699 else if (retval == 3)
13700 {
13701 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13702 goto tls_ldgd_opt;
13703 }
13704 }
13705 }
13706 }
13707 break;
13708
13709 case R_PPC64_GOT_TPREL16_HI:
13710 case R_PPC64_GOT_TPREL16_HA:
13711 if (tls_mask != 0
13712 && (tls_mask & TLS_TPREL) == 0)
13713 {
13714 rel->r_offset -= d_offset;
13715 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13716 r_type = R_PPC64_NONE;
13717 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13718 }
13719 break;
13720
13721 case R_PPC64_GOT_TPREL16_DS:
13722 case R_PPC64_GOT_TPREL16_LO_DS:
13723 if (tls_mask != 0
13724 && (tls_mask & TLS_TPREL) == 0)
13725 {
13726 toctprel:
13727 insn = bfd_get_32 (input_bfd,
13728 contents + rel->r_offset - d_offset);
13729 insn &= 31 << 21;
13730 insn |= 0x3c0d0000; /* addis 0,13,0 */
13731 bfd_put_32 (input_bfd, insn,
13732 contents + rel->r_offset - d_offset);
13733 r_type = R_PPC64_TPREL16_HA;
13734 if (toc_symndx != 0)
13735 {
13736 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13737 rel->r_addend = toc_addend;
13738 /* We changed the symbol. Start over in order to
13739 get h, sym, sec etc. right. */
13740 goto again;
13741 }
13742 else
13743 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13744 }
13745 break;
13746
13747 case R_PPC64_TLS:
13748 if (tls_mask != 0
13749 && (tls_mask & TLS_TPREL) == 0)
13750 {
13751 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13752 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13753 if (insn == 0)
13754 abort ();
13755 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13756 /* Was PPC64_TLS which sits on insn boundary, now
13757 PPC64_TPREL16_LO which is at low-order half-word. */
13758 rel->r_offset += d_offset;
13759 r_type = R_PPC64_TPREL16_LO;
13760 if (toc_symndx != 0)
13761 {
13762 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13763 rel->r_addend = toc_addend;
13764 /* We changed the symbol. Start over in order to
13765 get h, sym, sec etc. right. */
13766 goto again;
13767 }
13768 else
13769 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13770 }
13771 break;
13772
13773 case R_PPC64_GOT_TLSGD16_HI:
13774 case R_PPC64_GOT_TLSGD16_HA:
13775 tls_gd = TLS_TPRELGD;
13776 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13777 goto tls_gdld_hi;
13778 break;
13779
13780 case R_PPC64_GOT_TLSLD16_HI:
13781 case R_PPC64_GOT_TLSLD16_HA:
13782 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13783 {
13784 tls_gdld_hi:
13785 if ((tls_mask & tls_gd) != 0)
13786 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13787 + R_PPC64_GOT_TPREL16_DS);
13788 else
13789 {
13790 rel->r_offset -= d_offset;
13791 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13792 r_type = R_PPC64_NONE;
13793 }
13794 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13795 }
13796 break;
13797
13798 case R_PPC64_GOT_TLSGD16:
13799 case R_PPC64_GOT_TLSGD16_LO:
13800 tls_gd = TLS_TPRELGD;
13801 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13802 goto tls_ldgd_opt;
13803 break;
13804
13805 case R_PPC64_GOT_TLSLD16:
13806 case R_PPC64_GOT_TLSLD16_LO:
13807 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13808 {
13809 unsigned int insn1, insn2;
13810 bfd_vma offset;
13811
13812 tls_ldgd_opt:
13813 offset = (bfd_vma) -1;
13814 /* If not using the newer R_PPC64_TLSGD/LD to mark
13815 __tls_get_addr calls, we must trust that the call
13816 stays with its arg setup insns, ie. that the next
13817 reloc is the __tls_get_addr call associated with
13818 the current reloc. Edit both insns. */
13819 if (input_section->has_tls_get_addr_call
13820 && rel + 1 < relend
13821 && branch_reloc_hash_match (input_bfd, rel + 1,
13822 htab->tls_get_addr,
13823 htab->tls_get_addr_fd))
13824 offset = rel[1].r_offset;
13825 /* We read the low GOT_TLS (or TOC16) insn because we
13826 need to keep the destination reg. It may be
13827 something other than the usual r3, and moved to r3
13828 before the call by intervening code. */
13829 insn1 = bfd_get_32 (input_bfd,
13830 contents + rel->r_offset - d_offset);
13831 if ((tls_mask & tls_gd) != 0)
13832 {
13833 /* IE */
13834 insn1 &= (0x1f << 21) | (0x1f << 16);
13835 insn1 |= 58 << 26; /* ld */
13836 insn2 = 0x7c636a14; /* add 3,3,13 */
13837 if (offset != (bfd_vma) -1)
13838 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13839 if ((tls_mask & TLS_EXPLICIT) == 0)
13840 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13841 + R_PPC64_GOT_TPREL16_DS);
13842 else
13843 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13844 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13845 }
13846 else
13847 {
13848 /* LE */
13849 insn1 &= 0x1f << 21;
13850 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13851 insn2 = 0x38630000; /* addi 3,3,0 */
13852 if (tls_gd == 0)
13853 {
13854 /* Was an LD reloc. */
13855 if (toc_symndx)
13856 sec = local_sections[toc_symndx];
13857 for (r_symndx = 0;
13858 r_symndx < symtab_hdr->sh_info;
13859 r_symndx++)
13860 if (local_sections[r_symndx] == sec)
13861 break;
13862 if (r_symndx >= symtab_hdr->sh_info)
13863 r_symndx = STN_UNDEF;
13864 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13865 if (r_symndx != STN_UNDEF)
13866 rel->r_addend -= (local_syms[r_symndx].st_value
13867 + sec->output_offset
13868 + sec->output_section->vma);
13869 }
13870 else if (toc_symndx != 0)
13871 {
13872 r_symndx = toc_symndx;
13873 rel->r_addend = toc_addend;
13874 }
13875 r_type = R_PPC64_TPREL16_HA;
13876 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13877 if (offset != (bfd_vma) -1)
13878 {
13879 rel[1].r_info = ELF64_R_INFO (r_symndx,
13880 R_PPC64_TPREL16_LO);
13881 rel[1].r_offset = offset + d_offset;
13882 rel[1].r_addend = rel->r_addend;
13883 }
13884 }
13885 bfd_put_32 (input_bfd, insn1,
13886 contents + rel->r_offset - d_offset);
13887 if (offset != (bfd_vma) -1)
13888 bfd_put_32 (input_bfd, insn2, contents + offset);
13889 if ((tls_mask & tls_gd) == 0
13890 && (tls_gd == 0 || toc_symndx != 0))
13891 {
13892 /* We changed the symbol. Start over in order
13893 to get h, sym, sec etc. right. */
13894 goto again;
13895 }
13896 }
13897 break;
13898
13899 case R_PPC64_TLSGD:
13900 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13901 {
13902 unsigned int insn2;
13903 bfd_vma offset = rel->r_offset;
13904
13905 if ((tls_mask & TLS_TPRELGD) != 0)
13906 {
13907 /* IE */
13908 r_type = R_PPC64_NONE;
13909 insn2 = 0x7c636a14; /* add 3,3,13 */
13910 }
13911 else
13912 {
13913 /* LE */
13914 if (toc_symndx != 0)
13915 {
13916 r_symndx = toc_symndx;
13917 rel->r_addend = toc_addend;
13918 }
13919 r_type = R_PPC64_TPREL16_LO;
13920 rel->r_offset = offset + d_offset;
13921 insn2 = 0x38630000; /* addi 3,3,0 */
13922 }
13923 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13924 /* Zap the reloc on the _tls_get_addr call too. */
13925 BFD_ASSERT (offset == rel[1].r_offset);
13926 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13927 bfd_put_32 (input_bfd, insn2, contents + offset);
13928 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13929 goto again;
13930 }
13931 break;
13932
13933 case R_PPC64_TLSLD:
13934 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13935 {
13936 unsigned int insn2;
13937 bfd_vma offset = rel->r_offset;
13938
13939 if (toc_symndx)
13940 sec = local_sections[toc_symndx];
13941 for (r_symndx = 0;
13942 r_symndx < symtab_hdr->sh_info;
13943 r_symndx++)
13944 if (local_sections[r_symndx] == sec)
13945 break;
13946 if (r_symndx >= symtab_hdr->sh_info)
13947 r_symndx = STN_UNDEF;
13948 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13949 if (r_symndx != STN_UNDEF)
13950 rel->r_addend -= (local_syms[r_symndx].st_value
13951 + sec->output_offset
13952 + sec->output_section->vma);
13953
13954 r_type = R_PPC64_TPREL16_LO;
13955 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13956 rel->r_offset = offset + d_offset;
13957 /* Zap the reloc on the _tls_get_addr call too. */
13958 BFD_ASSERT (offset == rel[1].r_offset);
13959 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13960 insn2 = 0x38630000; /* addi 3,3,0 */
13961 bfd_put_32 (input_bfd, insn2, contents + offset);
13962 goto again;
13963 }
13964 break;
13965
13966 case R_PPC64_DTPMOD64:
13967 if (rel + 1 < relend
13968 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13969 && rel[1].r_offset == rel->r_offset + 8)
13970 {
13971 if ((tls_mask & TLS_GD) == 0)
13972 {
13973 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13974 if ((tls_mask & TLS_TPRELGD) != 0)
13975 r_type = R_PPC64_TPREL64;
13976 else
13977 {
13978 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13979 r_type = R_PPC64_NONE;
13980 }
13981 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13982 }
13983 }
13984 else
13985 {
13986 if ((tls_mask & TLS_LD) == 0)
13987 {
13988 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13989 r_type = R_PPC64_NONE;
13990 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13991 }
13992 }
13993 break;
13994
13995 case R_PPC64_TPREL64:
13996 if ((tls_mask & TLS_TPREL) == 0)
13997 {
13998 r_type = R_PPC64_NONE;
13999 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14000 }
14001 break;
14002
14003 case R_PPC64_ENTRY:
14004 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14005 if (!bfd_link_pic (info)
14006 && !info->traditional_format
14007 && relocation + 0x80008000 <= 0xffffffff)
14008 {
14009 unsigned int insn1, insn2;
14010
14011 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14012 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14013 if ((insn1 & ~0xfffc) == LD_R2_0R12
14014 && insn2 == ADD_R2_R2_R12)
14015 {
14016 bfd_put_32 (input_bfd,
14017 LIS_R2 + PPC_HA (relocation),
14018 contents + rel->r_offset);
14019 bfd_put_32 (input_bfd,
14020 ADDI_R2_R2 + PPC_LO (relocation),
14021 contents + rel->r_offset + 4);
14022 }
14023 }
14024 else
14025 {
14026 relocation -= (rel->r_offset
14027 + input_section->output_offset
14028 + input_section->output_section->vma);
14029 if (relocation + 0x80008000 <= 0xffffffff)
14030 {
14031 unsigned int insn1, insn2;
14032
14033 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14034 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14035 if ((insn1 & ~0xfffc) == LD_R2_0R12
14036 && insn2 == ADD_R2_R2_R12)
14037 {
14038 bfd_put_32 (input_bfd,
14039 ADDIS_R2_R12 + PPC_HA (relocation),
14040 contents + rel->r_offset);
14041 bfd_put_32 (input_bfd,
14042 ADDI_R2_R2 + PPC_LO (relocation),
14043 contents + rel->r_offset + 4);
14044 }
14045 }
14046 }
14047 break;
14048
14049 case R_PPC64_REL16_HA:
14050 /* If we are generating a non-PIC executable, edit
14051 . 0: addis 2,12,.TOC.-0b@ha
14052 . addi 2,2,.TOC.-0b@l
14053 used by ELFv2 global entry points to set up r2, to
14054 . lis 2,.TOC.@ha
14055 . addi 2,2,.TOC.@l
14056 if .TOC. is in range. */
14057 if (!bfd_link_pic (info)
14058 && !info->traditional_format
14059 && !htab->opd_abi
14060 && rel->r_addend == d_offset
14061 && h != NULL && &h->elf == htab->elf.hgot
14062 && rel + 1 < relend
14063 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14064 && rel[1].r_offset == rel->r_offset + 4
14065 && rel[1].r_addend == rel->r_addend + 4
14066 && relocation + 0x80008000 <= 0xffffffff)
14067 {
14068 unsigned int insn1, insn2;
14069 bfd_vma offset = rel->r_offset - d_offset;
14070 insn1 = bfd_get_32 (input_bfd, contents + offset);
14071 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14072 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14073 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14074 {
14075 r_type = R_PPC64_ADDR16_HA;
14076 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14077 rel->r_addend -= d_offset;
14078 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14079 rel[1].r_addend -= d_offset + 4;
14080 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14081 }
14082 }
14083 break;
14084 }
14085
14086 /* Handle other relocations that tweak non-addend part of insn. */
14087 insn = 0;
14088 max_br_offset = 1 << 25;
14089 addend = rel->r_addend;
14090 reloc_dest = DEST_NORMAL;
14091 switch (r_type)
14092 {
14093 default:
14094 break;
14095
14096 case R_PPC64_TOCSAVE:
14097 if (relocation + addend == (rel->r_offset
14098 + input_section->output_offset
14099 + input_section->output_section->vma)
14100 && tocsave_find (htab, NO_INSERT,
14101 &local_syms, rel, input_bfd))
14102 {
14103 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14104 if (insn == NOP
14105 || insn == CROR_151515 || insn == CROR_313131)
14106 bfd_put_32 (input_bfd,
14107 STD_R2_0R1 + STK_TOC (htab),
14108 contents + rel->r_offset);
14109 }
14110 break;
14111
14112 /* Branch taken prediction relocations. */
14113 case R_PPC64_ADDR14_BRTAKEN:
14114 case R_PPC64_REL14_BRTAKEN:
14115 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14116 /* Fall through. */
14117
14118 /* Branch not taken prediction relocations. */
14119 case R_PPC64_ADDR14_BRNTAKEN:
14120 case R_PPC64_REL14_BRNTAKEN:
14121 insn |= bfd_get_32 (input_bfd,
14122 contents + rel->r_offset) & ~(0x01 << 21);
14123 /* Fall through. */
14124
14125 case R_PPC64_REL14:
14126 max_br_offset = 1 << 15;
14127 /* Fall through. */
14128
14129 case R_PPC64_REL24:
14130 /* Calls to functions with a different TOC, such as calls to
14131 shared objects, need to alter the TOC pointer. This is
14132 done using a linkage stub. A REL24 branching to these
14133 linkage stubs needs to be followed by a nop, as the nop
14134 will be replaced with an instruction to restore the TOC
14135 base pointer. */
14136 fdh = h;
14137 if (h != NULL
14138 && h->oh != NULL
14139 && h->oh->is_func_descriptor)
14140 fdh = ppc_follow_link (h->oh);
14141 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14142 htab);
14143 if (stub_entry != NULL
14144 && (stub_entry->stub_type == ppc_stub_plt_call
14145 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14146 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14147 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14148 {
14149 bfd_boolean can_plt_call = FALSE;
14150
14151 if (stub_entry->stub_type == ppc_stub_plt_call
14152 && !htab->opd_abi
14153 && htab->params->plt_localentry0 != 0
14154 && is_elfv2_localentry0 (&h->elf))
14155 {
14156 /* The function doesn't use or change r2. */
14157 can_plt_call = TRUE;
14158 }
14159
14160 /* All of these stubs may modify r2, so there must be a
14161 branch and link followed by a nop. The nop is
14162 replaced by an insn to restore r2. */
14163 else if (rel->r_offset + 8 <= input_section->size)
14164 {
14165 unsigned long br;
14166
14167 br = bfd_get_32 (input_bfd,
14168 contents + rel->r_offset);
14169 if ((br & 1) != 0)
14170 {
14171 unsigned long nop;
14172
14173 nop = bfd_get_32 (input_bfd,
14174 contents + rel->r_offset + 4);
14175 if (nop == NOP
14176 || nop == CROR_151515 || nop == CROR_313131)
14177 {
14178 if (h != NULL
14179 && (h == htab->tls_get_addr_fd
14180 || h == htab->tls_get_addr)
14181 && htab->params->tls_get_addr_opt)
14182 {
14183 /* Special stub used, leave nop alone. */
14184 }
14185 else
14186 bfd_put_32 (input_bfd,
14187 LD_R2_0R1 + STK_TOC (htab),
14188 contents + rel->r_offset + 4);
14189 can_plt_call = TRUE;
14190 }
14191 }
14192 }
14193
14194 if (!can_plt_call && h != NULL)
14195 {
14196 const char *name = h->elf.root.root.string;
14197
14198 if (*name == '.')
14199 ++name;
14200
14201 if (strncmp (name, "__libc_start_main", 17) == 0
14202 && (name[17] == 0 || name[17] == '@'))
14203 {
14204 /* Allow crt1 branch to go via a toc adjusting
14205 stub. Other calls that never return could do
14206 the same, if we could detect such. */
14207 can_plt_call = TRUE;
14208 }
14209 }
14210
14211 if (!can_plt_call)
14212 {
14213 /* g++ as of 20130507 emits self-calls without a
14214 following nop. This is arguably wrong since we
14215 have conflicting information. On the one hand a
14216 global symbol and on the other a local call
14217 sequence, but don't error for this special case.
14218 It isn't possible to cheaply verify we have
14219 exactly such a call. Allow all calls to the same
14220 section. */
14221 asection *code_sec = sec;
14222
14223 if (get_opd_info (sec) != NULL)
14224 {
14225 bfd_vma off = (relocation + addend
14226 - sec->output_section->vma
14227 - sec->output_offset);
14228
14229 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14230 }
14231 if (code_sec == input_section)
14232 can_plt_call = TRUE;
14233 }
14234
14235 if (!can_plt_call)
14236 {
14237 if (stub_entry->stub_type == ppc_stub_plt_call
14238 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14239 info->callbacks->einfo
14240 /* xgettext:c-format */
14241 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14242 "recompile with -fPIC\n"),
14243 input_bfd, input_section, rel->r_offset, sym_name);
14244 else
14245 info->callbacks->einfo
14246 /* xgettext:c-format */
14247 (_("%H: call to `%pT' lacks nop, can't restore toc; "
14248 "(-mcmodel=small toc adjust stub)\n"),
14249 input_bfd, input_section, rel->r_offset, sym_name);
14250
14251 bfd_set_error (bfd_error_bad_value);
14252 ret = FALSE;
14253 }
14254
14255 if (can_plt_call
14256 && (stub_entry->stub_type == ppc_stub_plt_call
14257 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14258 unresolved_reloc = FALSE;
14259 }
14260
14261 if ((stub_entry == NULL
14262 || stub_entry->stub_type == ppc_stub_long_branch
14263 || stub_entry->stub_type == ppc_stub_plt_branch)
14264 && get_opd_info (sec) != NULL)
14265 {
14266 /* The branch destination is the value of the opd entry. */
14267 bfd_vma off = (relocation + addend
14268 - sec->output_section->vma
14269 - sec->output_offset);
14270 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14271 if (dest != (bfd_vma) -1)
14272 {
14273 relocation = dest;
14274 addend = 0;
14275 reloc_dest = DEST_OPD;
14276 }
14277 }
14278
14279 /* If the branch is out of reach we ought to have a long
14280 branch stub. */
14281 from = (rel->r_offset
14282 + input_section->output_offset
14283 + input_section->output_section->vma);
14284
14285 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14286 ? fdh->elf.other
14287 : sym->st_other);
14288
14289 if (stub_entry != NULL
14290 && (stub_entry->stub_type == ppc_stub_long_branch
14291 || stub_entry->stub_type == ppc_stub_plt_branch)
14292 && (r_type == R_PPC64_ADDR14_BRTAKEN
14293 || r_type == R_PPC64_ADDR14_BRNTAKEN
14294 || (relocation + addend - from + max_br_offset
14295 < 2 * max_br_offset)))
14296 /* Don't use the stub if this branch is in range. */
14297 stub_entry = NULL;
14298
14299 if (stub_entry != NULL)
14300 {
14301 /* Munge up the value and addend so that we call the stub
14302 rather than the procedure directly. */
14303 asection *stub_sec = stub_entry->group->stub_sec;
14304
14305 if (stub_entry->stub_type == ppc_stub_save_res)
14306 relocation += (stub_sec->output_offset
14307 + stub_sec->output_section->vma
14308 + stub_sec->size - htab->sfpr->size
14309 - htab->sfpr->output_offset
14310 - htab->sfpr->output_section->vma);
14311 else
14312 relocation = (stub_entry->stub_offset
14313 + stub_sec->output_offset
14314 + stub_sec->output_section->vma);
14315 addend = 0;
14316 reloc_dest = DEST_STUB;
14317
14318 if ((stub_entry->stub_type == ppc_stub_plt_call
14319 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14320 && (ALWAYS_EMIT_R2SAVE
14321 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14322 && rel + 1 < relend
14323 && rel[1].r_offset == rel->r_offset + 4
14324 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14325 relocation += 4;
14326 }
14327
14328 if (insn != 0)
14329 {
14330 if (is_isa_v2)
14331 {
14332 /* Set 'a' bit. This is 0b00010 in BO field for branch
14333 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14334 for branch on CTR insns (BO == 1a00t or 1a01t). */
14335 if ((insn & (0x14 << 21)) == (0x04 << 21))
14336 insn |= 0x02 << 21;
14337 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14338 insn |= 0x08 << 21;
14339 else
14340 break;
14341 }
14342 else
14343 {
14344 /* Invert 'y' bit if not the default. */
14345 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14346 insn ^= 0x01 << 21;
14347 }
14348
14349 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14350 }
14351
14352 /* NOP out calls to undefined weak functions.
14353 We can thus call a weak function without first
14354 checking whether the function is defined. */
14355 else if (h != NULL
14356 && h->elf.root.type == bfd_link_hash_undefweak
14357 && h->elf.dynindx == -1
14358 && r_type == R_PPC64_REL24
14359 && relocation == 0
14360 && addend == 0)
14361 {
14362 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14363 goto copy_reloc;
14364 }
14365 break;
14366 }
14367
14368 /* Set `addend'. */
14369 tls_type = 0;
14370 switch (r_type)
14371 {
14372 default:
14373 /* xgettext:c-format */
14374 _bfd_error_handler (_("%pB: %s unsupported"),
14375 input_bfd, ppc64_elf_howto_table[r_type]->name);
14376
14377 bfd_set_error (bfd_error_bad_value);
14378 ret = FALSE;
14379 goto copy_reloc;
14380
14381 case R_PPC64_NONE:
14382 case R_PPC64_TLS:
14383 case R_PPC64_TLSGD:
14384 case R_PPC64_TLSLD:
14385 case R_PPC64_TOCSAVE:
14386 case R_PPC64_GNU_VTINHERIT:
14387 case R_PPC64_GNU_VTENTRY:
14388 case R_PPC64_ENTRY:
14389 goto copy_reloc;
14390
14391 /* GOT16 relocations. Like an ADDR16 using the symbol's
14392 address in the GOT as relocation value instead of the
14393 symbol's value itself. Also, create a GOT entry for the
14394 symbol and put the symbol value there. */
14395 case R_PPC64_GOT_TLSGD16:
14396 case R_PPC64_GOT_TLSGD16_LO:
14397 case R_PPC64_GOT_TLSGD16_HI:
14398 case R_PPC64_GOT_TLSGD16_HA:
14399 tls_type = TLS_TLS | TLS_GD;
14400 goto dogot;
14401
14402 case R_PPC64_GOT_TLSLD16:
14403 case R_PPC64_GOT_TLSLD16_LO:
14404 case R_PPC64_GOT_TLSLD16_HI:
14405 case R_PPC64_GOT_TLSLD16_HA:
14406 tls_type = TLS_TLS | TLS_LD;
14407 goto dogot;
14408
14409 case R_PPC64_GOT_TPREL16_DS:
14410 case R_PPC64_GOT_TPREL16_LO_DS:
14411 case R_PPC64_GOT_TPREL16_HI:
14412 case R_PPC64_GOT_TPREL16_HA:
14413 tls_type = TLS_TLS | TLS_TPREL;
14414 goto dogot;
14415
14416 case R_PPC64_GOT_DTPREL16_DS:
14417 case R_PPC64_GOT_DTPREL16_LO_DS:
14418 case R_PPC64_GOT_DTPREL16_HI:
14419 case R_PPC64_GOT_DTPREL16_HA:
14420 tls_type = TLS_TLS | TLS_DTPREL;
14421 goto dogot;
14422
14423 case R_PPC64_GOT16:
14424 case R_PPC64_GOT16_LO:
14425 case R_PPC64_GOT16_HI:
14426 case R_PPC64_GOT16_HA:
14427 case R_PPC64_GOT16_DS:
14428 case R_PPC64_GOT16_LO_DS:
14429 dogot:
14430 {
14431 /* Relocation is to the entry for this symbol in the global
14432 offset table. */
14433 asection *got;
14434 bfd_vma *offp;
14435 bfd_vma off;
14436 unsigned long indx = 0;
14437 struct got_entry *ent;
14438
14439 if (tls_type == (TLS_TLS | TLS_LD)
14440 && (h == NULL
14441 || !h->elf.def_dynamic))
14442 ent = ppc64_tlsld_got (input_bfd);
14443 else
14444 {
14445 if (h != NULL)
14446 {
14447 if (!htab->elf.dynamic_sections_created
14448 || h->elf.dynindx == -1
14449 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14450 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14451 /* This is actually a static link, or it is a
14452 -Bsymbolic link and the symbol is defined
14453 locally, or the symbol was forced to be local
14454 because of a version file. */
14455 ;
14456 else
14457 {
14458 indx = h->elf.dynindx;
14459 unresolved_reloc = FALSE;
14460 }
14461 ent = h->elf.got.glist;
14462 }
14463 else
14464 {
14465 if (local_got_ents == NULL)
14466 abort ();
14467 ent = local_got_ents[r_symndx];
14468 }
14469
14470 for (; ent != NULL; ent = ent->next)
14471 if (ent->addend == orig_rel.r_addend
14472 && ent->owner == input_bfd
14473 && ent->tls_type == tls_type)
14474 break;
14475 }
14476
14477 if (ent == NULL)
14478 abort ();
14479 if (ent->is_indirect)
14480 ent = ent->got.ent;
14481 offp = &ent->got.offset;
14482 got = ppc64_elf_tdata (ent->owner)->got;
14483 if (got == NULL)
14484 abort ();
14485
14486 /* The offset must always be a multiple of 8. We use the
14487 least significant bit to record whether we have already
14488 processed this entry. */
14489 off = *offp;
14490 if ((off & 1) != 0)
14491 off &= ~1;
14492 else
14493 {
14494 /* Generate relocs for the dynamic linker, except in
14495 the case of TLSLD where we'll use one entry per
14496 module. */
14497 asection *relgot;
14498 bfd_boolean ifunc;
14499
14500 *offp = off | 1;
14501 relgot = NULL;
14502 ifunc = (h != NULL
14503 ? h->elf.type == STT_GNU_IFUNC
14504 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14505 if (ifunc)
14506 {
14507 relgot = htab->elf.irelplt;
14508 if (indx == 0)
14509 htab->local_ifunc_resolver = 1;
14510 else if (is_static_defined (&h->elf))
14511 htab->maybe_local_ifunc_resolver = 1;
14512 }
14513 else if (indx != 0
14514 || (bfd_link_pic (info)
14515 && (h == NULL
14516 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14517 || (tls_type == (TLS_TLS | TLS_LD)
14518 && !h->elf.def_dynamic))
14519 && !(tls_type == (TLS_TLS | TLS_TPREL)
14520 && bfd_link_executable (info)
14521 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14522 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14523 if (relgot != NULL)
14524 {
14525 outrel.r_offset = (got->output_section->vma
14526 + got->output_offset
14527 + off);
14528 outrel.r_addend = addend;
14529 if (tls_type & (TLS_LD | TLS_GD))
14530 {
14531 outrel.r_addend = 0;
14532 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14533 if (tls_type == (TLS_TLS | TLS_GD))
14534 {
14535 loc = relgot->contents;
14536 loc += (relgot->reloc_count++
14537 * sizeof (Elf64_External_Rela));
14538 bfd_elf64_swap_reloca_out (output_bfd,
14539 &outrel, loc);
14540 outrel.r_offset += 8;
14541 outrel.r_addend = addend;
14542 outrel.r_info
14543 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14544 }
14545 }
14546 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14547 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14548 else if (tls_type == (TLS_TLS | TLS_TPREL))
14549 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14550 else if (indx != 0)
14551 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14552 else
14553 {
14554 if (ifunc)
14555 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14556 else
14557 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14558
14559 /* Write the .got section contents for the sake
14560 of prelink. */
14561 loc = got->contents + off;
14562 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14563 loc);
14564 }
14565
14566 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14567 {
14568 outrel.r_addend += relocation;
14569 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14570 {
14571 if (htab->elf.tls_sec == NULL)
14572 outrel.r_addend = 0;
14573 else
14574 outrel.r_addend -= htab->elf.tls_sec->vma;
14575 }
14576 }
14577 loc = relgot->contents;
14578 loc += (relgot->reloc_count++
14579 * sizeof (Elf64_External_Rela));
14580 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14581 }
14582
14583 /* Init the .got section contents here if we're not
14584 emitting a reloc. */
14585 else
14586 {
14587 relocation += addend;
14588 if (tls_type != 0)
14589 {
14590 if (htab->elf.tls_sec == NULL)
14591 relocation = 0;
14592 else
14593 {
14594 if (tls_type & TLS_LD)
14595 relocation = 0;
14596 else
14597 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14598 if (tls_type & TLS_TPREL)
14599 relocation += DTP_OFFSET - TP_OFFSET;
14600 }
14601
14602 if (tls_type & (TLS_GD | TLS_LD))
14603 {
14604 bfd_put_64 (output_bfd, relocation,
14605 got->contents + off + 8);
14606 relocation = 1;
14607 }
14608 }
14609 bfd_put_64 (output_bfd, relocation,
14610 got->contents + off);
14611 }
14612 }
14613
14614 if (off >= (bfd_vma) -2)
14615 abort ();
14616
14617 relocation = got->output_section->vma + got->output_offset + off;
14618 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14619 }
14620 break;
14621
14622 case R_PPC64_PLT16_HA:
14623 case R_PPC64_PLT16_HI:
14624 case R_PPC64_PLT16_LO:
14625 case R_PPC64_PLT32:
14626 case R_PPC64_PLT64:
14627 /* Relocation is to the entry for this symbol in the
14628 procedure linkage table. */
14629 {
14630 struct plt_entry **plt_list = NULL;
14631 if (h != NULL)
14632 plt_list = &h->elf.plt.plist;
14633 else if (local_got_ents != NULL)
14634 {
14635 struct plt_entry **local_plt = (struct plt_entry **)
14636 (local_got_ents + symtab_hdr->sh_info);
14637 unsigned char *local_got_tls_masks = (unsigned char *)
14638 (local_plt + symtab_hdr->sh_info);
14639 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14640 plt_list = local_plt + r_symndx;
14641 }
14642 if (plt_list)
14643 {
14644 struct plt_entry *ent;
14645
14646 for (ent = *plt_list; ent != NULL; ent = ent->next)
14647 if (ent->plt.offset != (bfd_vma) -1
14648 && ent->addend == orig_rel.r_addend)
14649 {
14650 asection *plt;
14651
14652 plt = htab->elf.splt;
14653 if (!htab->elf.dynamic_sections_created
14654 || h == NULL
14655 || h->elf.dynindx == -1)
14656 plt = htab->elf.iplt;
14657 relocation = (plt->output_section->vma
14658 + plt->output_offset
14659 + ent->plt.offset);
14660 addend = 0;
14661 unresolved_reloc = FALSE;
14662 break;
14663 }
14664 }
14665 }
14666 break;
14667
14668 case R_PPC64_TOC:
14669 /* Relocation value is TOC base. */
14670 relocation = TOCstart;
14671 if (r_symndx == STN_UNDEF)
14672 relocation += htab->sec_info[input_section->id].toc_off;
14673 else if (unresolved_reloc)
14674 ;
14675 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14676 relocation += htab->sec_info[sec->id].toc_off;
14677 else
14678 unresolved_reloc = TRUE;
14679 goto dodyn;
14680
14681 /* TOC16 relocs. We want the offset relative to the TOC base,
14682 which is the address of the start of the TOC plus 0x8000.
14683 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14684 in this order. */
14685 case R_PPC64_TOC16:
14686 case R_PPC64_TOC16_LO:
14687 case R_PPC64_TOC16_HI:
14688 case R_PPC64_TOC16_DS:
14689 case R_PPC64_TOC16_LO_DS:
14690 case R_PPC64_TOC16_HA:
14691 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14692 break;
14693
14694 /* Relocate against the beginning of the section. */
14695 case R_PPC64_SECTOFF:
14696 case R_PPC64_SECTOFF_LO:
14697 case R_PPC64_SECTOFF_HI:
14698 case R_PPC64_SECTOFF_DS:
14699 case R_PPC64_SECTOFF_LO_DS:
14700 case R_PPC64_SECTOFF_HA:
14701 if (sec != NULL)
14702 addend -= sec->output_section->vma;
14703 break;
14704
14705 case R_PPC64_REL16:
14706 case R_PPC64_REL16_LO:
14707 case R_PPC64_REL16_HI:
14708 case R_PPC64_REL16_HA:
14709 case R_PPC64_REL16DX_HA:
14710 break;
14711
14712 case R_PPC64_REL14:
14713 case R_PPC64_REL14_BRNTAKEN:
14714 case R_PPC64_REL14_BRTAKEN:
14715 case R_PPC64_REL24:
14716 break;
14717
14718 case R_PPC64_TPREL16:
14719 case R_PPC64_TPREL16_LO:
14720 case R_PPC64_TPREL16_HI:
14721 case R_PPC64_TPREL16_HA:
14722 case R_PPC64_TPREL16_DS:
14723 case R_PPC64_TPREL16_LO_DS:
14724 case R_PPC64_TPREL16_HIGH:
14725 case R_PPC64_TPREL16_HIGHA:
14726 case R_PPC64_TPREL16_HIGHER:
14727 case R_PPC64_TPREL16_HIGHERA:
14728 case R_PPC64_TPREL16_HIGHEST:
14729 case R_PPC64_TPREL16_HIGHESTA:
14730 if (h != NULL
14731 && h->elf.root.type == bfd_link_hash_undefweak
14732 && h->elf.dynindx == -1)
14733 {
14734 /* Make this relocation against an undefined weak symbol
14735 resolve to zero. This is really just a tweak, since
14736 code using weak externs ought to check that they are
14737 defined before using them. */
14738 bfd_byte *p = contents + rel->r_offset - d_offset;
14739
14740 insn = bfd_get_32 (input_bfd, p);
14741 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14742 if (insn != 0)
14743 bfd_put_32 (input_bfd, insn, p);
14744 break;
14745 }
14746 if (htab->elf.tls_sec != NULL)
14747 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14748 /* The TPREL16 relocs shouldn't really be used in shared
14749 libs or with non-local symbols as that will result in
14750 DT_TEXTREL being set, but support them anyway. */
14751 goto dodyn;
14752
14753 case R_PPC64_DTPREL16:
14754 case R_PPC64_DTPREL16_LO:
14755 case R_PPC64_DTPREL16_HI:
14756 case R_PPC64_DTPREL16_HA:
14757 case R_PPC64_DTPREL16_DS:
14758 case R_PPC64_DTPREL16_LO_DS:
14759 case R_PPC64_DTPREL16_HIGH:
14760 case R_PPC64_DTPREL16_HIGHA:
14761 case R_PPC64_DTPREL16_HIGHER:
14762 case R_PPC64_DTPREL16_HIGHERA:
14763 case R_PPC64_DTPREL16_HIGHEST:
14764 case R_PPC64_DTPREL16_HIGHESTA:
14765 if (htab->elf.tls_sec != NULL)
14766 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14767 break;
14768
14769 case R_PPC64_ADDR64_LOCAL:
14770 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14771 ? h->elf.other
14772 : sym->st_other);
14773 break;
14774
14775 case R_PPC64_DTPMOD64:
14776 relocation = 1;
14777 addend = 0;
14778 goto dodyn;
14779
14780 case R_PPC64_TPREL64:
14781 if (htab->elf.tls_sec != NULL)
14782 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14783 goto dodyn;
14784
14785 case R_PPC64_DTPREL64:
14786 if (htab->elf.tls_sec != NULL)
14787 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14788 /* Fall through. */
14789
14790 /* Relocations that may need to be propagated if this is a
14791 dynamic object. */
14792 case R_PPC64_REL30:
14793 case R_PPC64_REL32:
14794 case R_PPC64_REL64:
14795 case R_PPC64_ADDR14:
14796 case R_PPC64_ADDR14_BRNTAKEN:
14797 case R_PPC64_ADDR14_BRTAKEN:
14798 case R_PPC64_ADDR16:
14799 case R_PPC64_ADDR16_DS:
14800 case R_PPC64_ADDR16_HA:
14801 case R_PPC64_ADDR16_HI:
14802 case R_PPC64_ADDR16_HIGH:
14803 case R_PPC64_ADDR16_HIGHA:
14804 case R_PPC64_ADDR16_HIGHER:
14805 case R_PPC64_ADDR16_HIGHERA:
14806 case R_PPC64_ADDR16_HIGHEST:
14807 case R_PPC64_ADDR16_HIGHESTA:
14808 case R_PPC64_ADDR16_LO:
14809 case R_PPC64_ADDR16_LO_DS:
14810 case R_PPC64_ADDR24:
14811 case R_PPC64_ADDR32:
14812 case R_PPC64_ADDR64:
14813 case R_PPC64_UADDR16:
14814 case R_PPC64_UADDR32:
14815 case R_PPC64_UADDR64:
14816 dodyn:
14817 if ((input_section->flags & SEC_ALLOC) == 0)
14818 break;
14819
14820 if (NO_OPD_RELOCS && is_opd)
14821 break;
14822
14823 if (bfd_link_pic (info)
14824 ? ((h == NULL
14825 || h->dyn_relocs != NULL)
14826 && ((h != NULL && pc_dynrelocs (h))
14827 || must_be_dyn_reloc (info, r_type)))
14828 : (h != NULL
14829 ? h->dyn_relocs != NULL
14830 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14831 {
14832 bfd_boolean skip, relocate;
14833 asection *sreloc;
14834 bfd_vma out_off;
14835 long indx = 0;
14836
14837 /* When generating a dynamic object, these relocations
14838 are copied into the output file to be resolved at run
14839 time. */
14840
14841 skip = FALSE;
14842 relocate = FALSE;
14843
14844 out_off = _bfd_elf_section_offset (output_bfd, info,
14845 input_section, rel->r_offset);
14846 if (out_off == (bfd_vma) -1)
14847 skip = TRUE;
14848 else if (out_off == (bfd_vma) -2)
14849 skip = TRUE, relocate = TRUE;
14850 out_off += (input_section->output_section->vma
14851 + input_section->output_offset);
14852 outrel.r_offset = out_off;
14853 outrel.r_addend = rel->r_addend;
14854
14855 /* Optimize unaligned reloc use. */
14856 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14857 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14858 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14859 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14860 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14861 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14862 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14863 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14864 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14865
14866 if (skip)
14867 memset (&outrel, 0, sizeof outrel);
14868 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14869 && !is_opd
14870 && r_type != R_PPC64_TOC)
14871 {
14872 indx = h->elf.dynindx;
14873 BFD_ASSERT (indx != -1);
14874 outrel.r_info = ELF64_R_INFO (indx, r_type);
14875 }
14876 else
14877 {
14878 /* This symbol is local, or marked to become local,
14879 or this is an opd section reloc which must point
14880 at a local function. */
14881 outrel.r_addend += relocation;
14882 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14883 {
14884 if (is_opd && h != NULL)
14885 {
14886 /* Lie about opd entries. This case occurs
14887 when building shared libraries and we
14888 reference a function in another shared
14889 lib. The same thing happens for a weak
14890 definition in an application that's
14891 overridden by a strong definition in a
14892 shared lib. (I believe this is a generic
14893 bug in binutils handling of weak syms.)
14894 In these cases we won't use the opd
14895 entry in this lib. */
14896 unresolved_reloc = FALSE;
14897 }
14898 if (!is_opd
14899 && r_type == R_PPC64_ADDR64
14900 && (h != NULL
14901 ? h->elf.type == STT_GNU_IFUNC
14902 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14903 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14904 else
14905 {
14906 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14907
14908 /* We need to relocate .opd contents for ld.so.
14909 Prelink also wants simple and consistent rules
14910 for relocs. This make all RELATIVE relocs have
14911 *r_offset equal to r_addend. */
14912 relocate = TRUE;
14913 }
14914 }
14915 else
14916 {
14917 if (h != NULL
14918 ? h->elf.type == STT_GNU_IFUNC
14919 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14920 {
14921 info->callbacks->einfo
14922 /* xgettext:c-format */
14923 (_("%H: %s for indirect "
14924 "function `%pT' unsupported\n"),
14925 input_bfd, input_section, rel->r_offset,
14926 ppc64_elf_howto_table[r_type]->name,
14927 sym_name);
14928 ret = FALSE;
14929 }
14930 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14931 ;
14932 else if (sec == NULL || sec->owner == NULL)
14933 {
14934 bfd_set_error (bfd_error_bad_value);
14935 return FALSE;
14936 }
14937 else
14938 {
14939 asection *osec;
14940
14941 osec = sec->output_section;
14942 indx = elf_section_data (osec)->dynindx;
14943
14944 if (indx == 0)
14945 {
14946 if ((osec->flags & SEC_READONLY) == 0
14947 && htab->elf.data_index_section != NULL)
14948 osec = htab->elf.data_index_section;
14949 else
14950 osec = htab->elf.text_index_section;
14951 indx = elf_section_data (osec)->dynindx;
14952 }
14953 BFD_ASSERT (indx != 0);
14954
14955 /* We are turning this relocation into one
14956 against a section symbol, so subtract out
14957 the output section's address but not the
14958 offset of the input section in the output
14959 section. */
14960 outrel.r_addend -= osec->vma;
14961 }
14962
14963 outrel.r_info = ELF64_R_INFO (indx, r_type);
14964 }
14965 }
14966
14967 sreloc = elf_section_data (input_section)->sreloc;
14968 if (h != NULL
14969 ? h->elf.type == STT_GNU_IFUNC
14970 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14971 {
14972 sreloc = htab->elf.irelplt;
14973 if (indx == 0)
14974 htab->local_ifunc_resolver = 1;
14975 else if (is_static_defined (&h->elf))
14976 htab->maybe_local_ifunc_resolver = 1;
14977 }
14978 if (sreloc == NULL)
14979 abort ();
14980
14981 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14982 >= sreloc->size)
14983 abort ();
14984 loc = sreloc->contents;
14985 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14986 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14987
14988 /* If this reloc is against an external symbol, it will
14989 be computed at runtime, so there's no need to do
14990 anything now. However, for the sake of prelink ensure
14991 that the section contents are a known value. */
14992 if (! relocate)
14993 {
14994 unresolved_reloc = FALSE;
14995 /* The value chosen here is quite arbitrary as ld.so
14996 ignores section contents except for the special
14997 case of .opd where the contents might be accessed
14998 before relocation. Choose zero, as that won't
14999 cause reloc overflow. */
15000 relocation = 0;
15001 addend = 0;
15002 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15003 to improve backward compatibility with older
15004 versions of ld. */
15005 if (r_type == R_PPC64_ADDR64)
15006 addend = outrel.r_addend;
15007 /* Adjust pc_relative relocs to have zero in *r_offset. */
15008 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15009 addend = outrel.r_offset;
15010 }
15011 }
15012 break;
15013
15014 case R_PPC64_COPY:
15015 case R_PPC64_GLOB_DAT:
15016 case R_PPC64_JMP_SLOT:
15017 case R_PPC64_JMP_IREL:
15018 case R_PPC64_RELATIVE:
15019 /* We shouldn't ever see these dynamic relocs in relocatable
15020 files. */
15021 /* Fall through. */
15022
15023 case R_PPC64_PLTGOT16:
15024 case R_PPC64_PLTGOT16_DS:
15025 case R_PPC64_PLTGOT16_HA:
15026 case R_PPC64_PLTGOT16_HI:
15027 case R_PPC64_PLTGOT16_LO:
15028 case R_PPC64_PLTGOT16_LO_DS:
15029 case R_PPC64_PLTREL32:
15030 case R_PPC64_PLTREL64:
15031 /* These ones haven't been implemented yet. */
15032
15033 info->callbacks->einfo
15034 /* xgettext:c-format */
15035 (_("%P: %pB: %s is not supported for `%pT'\n"),
15036 input_bfd,
15037 ppc64_elf_howto_table[r_type]->name, sym_name);
15038
15039 bfd_set_error (bfd_error_invalid_operation);
15040 ret = FALSE;
15041 goto copy_reloc;
15042 }
15043
15044 /* Multi-instruction sequences that access the TOC can be
15045 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15046 to nop; addi rb,r2,x; */
15047 switch (r_type)
15048 {
15049 default:
15050 break;
15051
15052 case R_PPC64_GOT_TLSLD16_HI:
15053 case R_PPC64_GOT_TLSGD16_HI:
15054 case R_PPC64_GOT_TPREL16_HI:
15055 case R_PPC64_GOT_DTPREL16_HI:
15056 case R_PPC64_GOT16_HI:
15057 case R_PPC64_TOC16_HI:
15058 /* These relocs would only be useful if building up an
15059 offset to later add to r2, perhaps in an indexed
15060 addressing mode instruction. Don't try to optimize.
15061 Unfortunately, the possibility of someone building up an
15062 offset like this or even with the HA relocs, means that
15063 we need to check the high insn when optimizing the low
15064 insn. */
15065 break;
15066
15067 case R_PPC64_GOT_TLSLD16_HA:
15068 case R_PPC64_GOT_TLSGD16_HA:
15069 case R_PPC64_GOT_TPREL16_HA:
15070 case R_PPC64_GOT_DTPREL16_HA:
15071 case R_PPC64_GOT16_HA:
15072 case R_PPC64_TOC16_HA:
15073 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15074 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15075 {
15076 bfd_byte *p = contents + (rel->r_offset & ~3);
15077 bfd_put_32 (input_bfd, NOP, p);
15078 goto copy_reloc;
15079 }
15080 break;
15081
15082 case R_PPC64_GOT_TLSLD16_LO:
15083 case R_PPC64_GOT_TLSGD16_LO:
15084 case R_PPC64_GOT_TPREL16_LO_DS:
15085 case R_PPC64_GOT_DTPREL16_LO_DS:
15086 case R_PPC64_GOT16_LO:
15087 case R_PPC64_GOT16_LO_DS:
15088 case R_PPC64_TOC16_LO:
15089 case R_PPC64_TOC16_LO_DS:
15090 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15091 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15092 {
15093 bfd_byte *p = contents + (rel->r_offset & ~3);
15094 insn = bfd_get_32 (input_bfd, p);
15095 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15096 {
15097 /* Transform addic to addi when we change reg. */
15098 insn &= ~((0x3f << 26) | (0x1f << 16));
15099 insn |= (14u << 26) | (2 << 16);
15100 }
15101 else
15102 {
15103 insn &= ~(0x1f << 16);
15104 insn |= 2 << 16;
15105 }
15106 bfd_put_32 (input_bfd, insn, p);
15107 }
15108 break;
15109
15110 case R_PPC64_TPREL16_HA:
15111 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15112 {
15113 bfd_byte *p = contents + (rel->r_offset & ~3);
15114 insn = bfd_get_32 (input_bfd, p);
15115 if ((insn & ((0x3f << 26) | 0x1f << 16))
15116 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15117 /* xgettext:c-format */
15118 info->callbacks->minfo
15119 (_("%H: warning: %s unexpected insn %#x.\n"),
15120 input_bfd, input_section, rel->r_offset,
15121 ppc64_elf_howto_table[r_type]->name, insn);
15122 else
15123 {
15124 bfd_put_32 (input_bfd, NOP, p);
15125 goto copy_reloc;
15126 }
15127 }
15128 break;
15129
15130 case R_PPC64_TPREL16_LO:
15131 case R_PPC64_TPREL16_LO_DS:
15132 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15133 {
15134 bfd_byte *p = contents + (rel->r_offset & ~3);
15135 insn = bfd_get_32 (input_bfd, p);
15136 insn &= ~(0x1f << 16);
15137 insn |= 13 << 16;
15138 bfd_put_32 (input_bfd, insn, p);
15139 }
15140 break;
15141 }
15142
15143 /* Do any further special processing. */
15144 switch (r_type)
15145 {
15146 default:
15147 break;
15148
15149 case R_PPC64_REL16_HA:
15150 case R_PPC64_REL16DX_HA:
15151 case R_PPC64_ADDR16_HA:
15152 case R_PPC64_ADDR16_HIGHA:
15153 case R_PPC64_ADDR16_HIGHERA:
15154 case R_PPC64_ADDR16_HIGHESTA:
15155 case R_PPC64_TOC16_HA:
15156 case R_PPC64_SECTOFF_HA:
15157 case R_PPC64_TPREL16_HA:
15158 case R_PPC64_TPREL16_HIGHA:
15159 case R_PPC64_TPREL16_HIGHERA:
15160 case R_PPC64_TPREL16_HIGHESTA:
15161 case R_PPC64_DTPREL16_HA:
15162 case R_PPC64_DTPREL16_HIGHA:
15163 case R_PPC64_DTPREL16_HIGHERA:
15164 case R_PPC64_DTPREL16_HIGHESTA:
15165 /* It's just possible that this symbol is a weak symbol
15166 that's not actually defined anywhere. In that case,
15167 'sec' would be NULL, and we should leave the symbol
15168 alone (it will be set to zero elsewhere in the link). */
15169 if (sec == NULL)
15170 break;
15171 /* Fall through. */
15172
15173 case R_PPC64_GOT16_HA:
15174 case R_PPC64_PLTGOT16_HA:
15175 case R_PPC64_PLT16_HA:
15176 case R_PPC64_GOT_TLSGD16_HA:
15177 case R_PPC64_GOT_TLSLD16_HA:
15178 case R_PPC64_GOT_TPREL16_HA:
15179 case R_PPC64_GOT_DTPREL16_HA:
15180 /* Add 0x10000 if sign bit in 0:15 is set.
15181 Bits 0:15 are not used. */
15182 addend += 0x8000;
15183 break;
15184
15185 case R_PPC64_ADDR16_DS:
15186 case R_PPC64_ADDR16_LO_DS:
15187 case R_PPC64_GOT16_DS:
15188 case R_PPC64_GOT16_LO_DS:
15189 case R_PPC64_PLT16_LO_DS:
15190 case R_PPC64_SECTOFF_DS:
15191 case R_PPC64_SECTOFF_LO_DS:
15192 case R_PPC64_TOC16_DS:
15193 case R_PPC64_TOC16_LO_DS:
15194 case R_PPC64_PLTGOT16_DS:
15195 case R_PPC64_PLTGOT16_LO_DS:
15196 case R_PPC64_GOT_TPREL16_DS:
15197 case R_PPC64_GOT_TPREL16_LO_DS:
15198 case R_PPC64_GOT_DTPREL16_DS:
15199 case R_PPC64_GOT_DTPREL16_LO_DS:
15200 case R_PPC64_TPREL16_DS:
15201 case R_PPC64_TPREL16_LO_DS:
15202 case R_PPC64_DTPREL16_DS:
15203 case R_PPC64_DTPREL16_LO_DS:
15204 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15205 mask = 3;
15206 /* If this reloc is against an lq, lxv, or stxv insn, then
15207 the value must be a multiple of 16. This is somewhat of
15208 a hack, but the "correct" way to do this by defining _DQ
15209 forms of all the _DS relocs bloats all reloc switches in
15210 this file. It doesn't make much sense to use these
15211 relocs in data, so testing the insn should be safe. */
15212 if ((insn & (0x3f << 26)) == (56u << 26)
15213 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15214 mask = 15;
15215 relocation += addend;
15216 addend = insn & (mask ^ 3);
15217 if ((relocation & mask) != 0)
15218 {
15219 relocation ^= relocation & mask;
15220 info->callbacks->einfo
15221 /* xgettext:c-format */
15222 (_("%H: error: %s not a multiple of %u\n"),
15223 input_bfd, input_section, rel->r_offset,
15224 ppc64_elf_howto_table[r_type]->name,
15225 mask + 1);
15226 bfd_set_error (bfd_error_bad_value);
15227 ret = FALSE;
15228 goto copy_reloc;
15229 }
15230 break;
15231 }
15232
15233 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15234 because such sections are not SEC_ALLOC and thus ld.so will
15235 not process them. */
15236 howto = ppc64_elf_howto_table[(int) r_type];
15237 if (unresolved_reloc
15238 && !((input_section->flags & SEC_DEBUGGING) != 0
15239 && h->elf.def_dynamic)
15240 && _bfd_elf_section_offset (output_bfd, info, input_section,
15241 rel->r_offset) != (bfd_vma) -1)
15242 {
15243 info->callbacks->einfo
15244 /* xgettext:c-format */
15245 (_("%H: unresolvable %s against `%pT'\n"),
15246 input_bfd, input_section, rel->r_offset,
15247 howto->name,
15248 h->elf.root.root.string);
15249 ret = FALSE;
15250 }
15251
15252 /* 16-bit fields in insns mostly have signed values, but a
15253 few insns have 16-bit unsigned values. Really, we should
15254 have different reloc types. */
15255 if (howto->complain_on_overflow != complain_overflow_dont
15256 && howto->dst_mask == 0xffff
15257 && (input_section->flags & SEC_CODE) != 0)
15258 {
15259 enum complain_overflow complain = complain_overflow_signed;
15260
15261 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15262 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15263 complain = complain_overflow_bitfield;
15264 else if (howto->rightshift == 0
15265 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15266 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15267 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15268 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15269 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15270 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15271 complain = complain_overflow_unsigned;
15272 if (howto->complain_on_overflow != complain)
15273 {
15274 alt_howto = *howto;
15275 alt_howto.complain_on_overflow = complain;
15276 howto = &alt_howto;
15277 }
15278 }
15279
15280 if (r_type == R_PPC64_REL16DX_HA)
15281 {
15282 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15283 if (rel->r_offset + 4 > input_section->size)
15284 r = bfd_reloc_outofrange;
15285 else
15286 {
15287 relocation += addend;
15288 relocation -= (rel->r_offset
15289 + input_section->output_offset
15290 + input_section->output_section->vma);
15291 relocation = (bfd_signed_vma) relocation >> 16;
15292 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15293 insn &= ~0x1fffc1;
15294 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15295 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15296 r = bfd_reloc_ok;
15297 if (relocation + 0x8000 > 0xffff)
15298 r = bfd_reloc_overflow;
15299 }
15300 }
15301 else
15302 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15303 rel->r_offset, relocation, addend);
15304
15305 if (r != bfd_reloc_ok)
15306 {
15307 char *more_info = NULL;
15308 const char *reloc_name = howto->name;
15309
15310 if (reloc_dest != DEST_NORMAL)
15311 {
15312 more_info = bfd_malloc (strlen (reloc_name) + 8);
15313 if (more_info != NULL)
15314 {
15315 strcpy (more_info, reloc_name);
15316 strcat (more_info, (reloc_dest == DEST_OPD
15317 ? " (OPD)" : " (stub)"));
15318 reloc_name = more_info;
15319 }
15320 }
15321
15322 if (r == bfd_reloc_overflow)
15323 {
15324 /* On code like "if (foo) foo();" don't report overflow
15325 on a branch to zero when foo is undefined. */
15326 if (!warned
15327 && (reloc_dest == DEST_STUB
15328 || !(h != NULL
15329 && (h->elf.root.type == bfd_link_hash_undefweak
15330 || h->elf.root.type == bfd_link_hash_undefined)
15331 && is_branch_reloc (r_type))))
15332 info->callbacks->reloc_overflow (info, &h->elf.root,
15333 sym_name, reloc_name,
15334 orig_rel.r_addend,
15335 input_bfd, input_section,
15336 rel->r_offset);
15337 }
15338 else
15339 {
15340 info->callbacks->einfo
15341 /* xgettext:c-format */
15342 (_("%H: %s against `%pT': error %d\n"),
15343 input_bfd, input_section, rel->r_offset,
15344 reloc_name, sym_name, (int) r);
15345 ret = FALSE;
15346 }
15347 if (more_info != NULL)
15348 free (more_info);
15349 }
15350 copy_reloc:
15351 if (wrel != rel)
15352 *wrel = *rel;
15353 }
15354
15355 if (wrel != rel)
15356 {
15357 Elf_Internal_Shdr *rel_hdr;
15358 size_t deleted = rel - wrel;
15359
15360 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15361 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15362 if (rel_hdr->sh_size == 0)
15363 {
15364 /* It is too late to remove an empty reloc section. Leave
15365 one NONE reloc.
15366 ??? What is wrong with an empty section??? */
15367 rel_hdr->sh_size = rel_hdr->sh_entsize;
15368 deleted -= 1;
15369 }
15370 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15371 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15372 input_section->reloc_count -= deleted;
15373 }
15374
15375 /* If we're emitting relocations, then shortly after this function
15376 returns, reloc offsets and addends for this section will be
15377 adjusted. Worse, reloc symbol indices will be for the output
15378 file rather than the input. Save a copy of the relocs for
15379 opd_entry_value. */
15380 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15381 {
15382 bfd_size_type amt;
15383 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15384 rel = bfd_alloc (input_bfd, amt);
15385 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15386 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15387 if (rel == NULL)
15388 return FALSE;
15389 memcpy (rel, relocs, amt);
15390 }
15391 return ret;
15392 }
15393
15394 /* Adjust the value of any local symbols in opd sections. */
15395
15396 static int
15397 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15398 const char *name ATTRIBUTE_UNUSED,
15399 Elf_Internal_Sym *elfsym,
15400 asection *input_sec,
15401 struct elf_link_hash_entry *h)
15402 {
15403 struct _opd_sec_data *opd;
15404 long adjust;
15405 bfd_vma value;
15406
15407 if (h != NULL)
15408 return 1;
15409
15410 opd = get_opd_info (input_sec);
15411 if (opd == NULL || opd->adjust == NULL)
15412 return 1;
15413
15414 value = elfsym->st_value - input_sec->output_offset;
15415 if (!bfd_link_relocatable (info))
15416 value -= input_sec->output_section->vma;
15417
15418 adjust = opd->adjust[OPD_NDX (value)];
15419 if (adjust == -1)
15420 return 2;
15421
15422 elfsym->st_value += adjust;
15423 return 1;
15424 }
15425
15426 /* Finish up dynamic symbol handling. We set the contents of various
15427 dynamic sections here. */
15428
15429 static bfd_boolean
15430 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15431 struct bfd_link_info *info,
15432 struct elf_link_hash_entry *h,
15433 Elf_Internal_Sym *sym)
15434 {
15435 struct ppc_link_hash_table *htab;
15436 struct plt_entry *ent;
15437 Elf_Internal_Rela rela;
15438 bfd_byte *loc;
15439
15440 htab = ppc_hash_table (info);
15441 if (htab == NULL)
15442 return FALSE;
15443
15444 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15445 if (ent->plt.offset != (bfd_vma) -1)
15446 {
15447 /* This symbol has an entry in the procedure linkage
15448 table. Set it up. */
15449 if (!htab->elf.dynamic_sections_created
15450 || h->dynindx == -1)
15451 {
15452 BFD_ASSERT (h->type == STT_GNU_IFUNC
15453 && h->def_regular
15454 && (h->root.type == bfd_link_hash_defined
15455 || h->root.type == bfd_link_hash_defweak));
15456 rela.r_offset = (htab->elf.iplt->output_section->vma
15457 + htab->elf.iplt->output_offset
15458 + ent->plt.offset);
15459 if (htab->opd_abi)
15460 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15461 else
15462 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15463 rela.r_addend = (h->root.u.def.value
15464 + h->root.u.def.section->output_offset
15465 + h->root.u.def.section->output_section->vma
15466 + ent->addend);
15467 loc = (htab->elf.irelplt->contents
15468 + (htab->elf.irelplt->reloc_count++
15469 * sizeof (Elf64_External_Rela)));
15470 htab->local_ifunc_resolver = 1;
15471 }
15472 else
15473 {
15474 rela.r_offset = (htab->elf.splt->output_section->vma
15475 + htab->elf.splt->output_offset
15476 + ent->plt.offset);
15477 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15478 rela.r_addend = ent->addend;
15479 loc = (htab->elf.srelplt->contents
15480 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15481 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15482 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15483 htab->maybe_local_ifunc_resolver = 1;
15484 }
15485 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15486
15487 if (!htab->opd_abi)
15488 {
15489 if (!h->def_regular)
15490 {
15491 /* Mark the symbol as undefined, rather than as
15492 defined in glink. Leave the value if there were
15493 any relocations where pointer equality matters
15494 (this is a clue for the dynamic linker, to make
15495 function pointer comparisons work between an
15496 application and shared library), otherwise set it
15497 to zero. */
15498 sym->st_shndx = SHN_UNDEF;
15499 if (!h->pointer_equality_needed)
15500 sym->st_value = 0;
15501 else if (!h->ref_regular_nonweak)
15502 {
15503 /* This breaks function pointer comparisons, but
15504 that is better than breaking tests for a NULL
15505 function pointer. */
15506 sym->st_value = 0;
15507 }
15508 }
15509 }
15510 }
15511
15512 if (h->needs_copy)
15513 {
15514 /* This symbol needs a copy reloc. Set it up. */
15515 asection *srel;
15516
15517 if (h->dynindx == -1
15518 || (h->root.type != bfd_link_hash_defined
15519 && h->root.type != bfd_link_hash_defweak)
15520 || htab->elf.srelbss == NULL
15521 || htab->elf.sreldynrelro == NULL)
15522 abort ();
15523
15524 rela.r_offset = (h->root.u.def.value
15525 + h->root.u.def.section->output_section->vma
15526 + h->root.u.def.section->output_offset);
15527 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15528 rela.r_addend = 0;
15529 if (h->root.u.def.section == htab->elf.sdynrelro)
15530 srel = htab->elf.sreldynrelro;
15531 else
15532 srel = htab->elf.srelbss;
15533 loc = srel->contents;
15534 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15535 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15536 }
15537
15538 return TRUE;
15539 }
15540
15541 /* Used to decide how to sort relocs in an optimal manner for the
15542 dynamic linker, before writing them out. */
15543
15544 static enum elf_reloc_type_class
15545 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15546 const asection *rel_sec,
15547 const Elf_Internal_Rela *rela)
15548 {
15549 enum elf_ppc64_reloc_type r_type;
15550 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15551
15552 if (rel_sec == htab->elf.irelplt)
15553 return reloc_class_ifunc;
15554
15555 r_type = ELF64_R_TYPE (rela->r_info);
15556 switch (r_type)
15557 {
15558 case R_PPC64_RELATIVE:
15559 return reloc_class_relative;
15560 case R_PPC64_JMP_SLOT:
15561 return reloc_class_plt;
15562 case R_PPC64_COPY:
15563 return reloc_class_copy;
15564 default:
15565 return reloc_class_normal;
15566 }
15567 }
15568
15569 /* Finish up the dynamic sections. */
15570
15571 static bfd_boolean
15572 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15573 struct bfd_link_info *info)
15574 {
15575 struct ppc_link_hash_table *htab;
15576 bfd *dynobj;
15577 asection *sdyn;
15578
15579 htab = ppc_hash_table (info);
15580 if (htab == NULL)
15581 return FALSE;
15582
15583 dynobj = htab->elf.dynobj;
15584 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15585
15586 if (htab->elf.dynamic_sections_created)
15587 {
15588 Elf64_External_Dyn *dyncon, *dynconend;
15589
15590 if (sdyn == NULL || htab->elf.sgot == NULL)
15591 abort ();
15592
15593 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15594 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15595 for (; dyncon < dynconend; dyncon++)
15596 {
15597 Elf_Internal_Dyn dyn;
15598 asection *s;
15599
15600 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15601
15602 switch (dyn.d_tag)
15603 {
15604 default:
15605 continue;
15606
15607 case DT_PPC64_GLINK:
15608 s = htab->glink;
15609 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15610 /* We stupidly defined DT_PPC64_GLINK to be the start
15611 of glink rather than the first entry point, which is
15612 what ld.so needs, and now have a bigger stub to
15613 support automatic multiple TOCs. */
15614 dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4;
15615 break;
15616
15617 case DT_PPC64_OPD:
15618 s = bfd_get_section_by_name (output_bfd, ".opd");
15619 if (s == NULL)
15620 continue;
15621 dyn.d_un.d_ptr = s->vma;
15622 break;
15623
15624 case DT_PPC64_OPT:
15625 if (htab->do_multi_toc && htab->multi_toc_needed)
15626 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15627 if (htab->has_plt_localentry0)
15628 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15629 break;
15630
15631 case DT_PPC64_OPDSZ:
15632 s = bfd_get_section_by_name (output_bfd, ".opd");
15633 if (s == NULL)
15634 continue;
15635 dyn.d_un.d_val = s->size;
15636 break;
15637
15638 case DT_PLTGOT:
15639 s = htab->elf.splt;
15640 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15641 break;
15642
15643 case DT_JMPREL:
15644 s = htab->elf.srelplt;
15645 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15646 break;
15647
15648 case DT_PLTRELSZ:
15649 dyn.d_un.d_val = htab->elf.srelplt->size;
15650 break;
15651
15652 case DT_TEXTREL:
15653 if (htab->local_ifunc_resolver)
15654 info->callbacks->einfo
15655 (_("%X%P: text relocations and GNU indirect "
15656 "functions will result in a segfault at runtime\n"));
15657 else if (htab->maybe_local_ifunc_resolver)
15658 info->callbacks->einfo
15659 (_("%P: warning: text relocations and GNU indirect "
15660 "functions may result in a segfault at runtime\n"));
15661 continue;
15662 }
15663
15664 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15665 }
15666 }
15667
15668 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15669 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15670 {
15671 /* Fill in the first entry in the global offset table.
15672 We use it to hold the link-time TOCbase. */
15673 bfd_put_64 (output_bfd,
15674 elf_gp (output_bfd) + TOC_BASE_OFF,
15675 htab->elf.sgot->contents);
15676
15677 /* Set .got entry size. */
15678 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15679 }
15680
15681 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15682 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15683 {
15684 /* Set .plt entry size. */
15685 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15686 = PLT_ENTRY_SIZE (htab);
15687 }
15688
15689 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15690 brlt ourselves if emitrelocations. */
15691 if (htab->brlt != NULL
15692 && htab->brlt->reloc_count != 0
15693 && !_bfd_elf_link_output_relocs (output_bfd,
15694 htab->brlt,
15695 elf_section_data (htab->brlt)->rela.hdr,
15696 elf_section_data (htab->brlt)->relocs,
15697 NULL))
15698 return FALSE;
15699
15700 if (htab->glink != NULL
15701 && htab->glink->reloc_count != 0
15702 && !_bfd_elf_link_output_relocs (output_bfd,
15703 htab->glink,
15704 elf_section_data (htab->glink)->rela.hdr,
15705 elf_section_data (htab->glink)->relocs,
15706 NULL))
15707 return FALSE;
15708
15709 if (htab->glink_eh_frame != NULL
15710 && htab->glink_eh_frame->size != 0)
15711 {
15712 bfd_vma val;
15713 bfd_byte *p;
15714 struct map_stub *group;
15715 size_t align = 4;
15716
15717 p = htab->glink_eh_frame->contents;
15718 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15719
15720 for (group = htab->group; group != NULL; group = group->next)
15721 if (group->stub_sec != NULL)
15722 {
15723 /* Offset to stub section. */
15724 val = (group->stub_sec->output_section->vma
15725 + group->stub_sec->output_offset);
15726 val -= (htab->glink_eh_frame->output_section->vma
15727 + htab->glink_eh_frame->output_offset
15728 + (p + 8 - htab->glink_eh_frame->contents));
15729 if (val + 0x80000000 > 0xffffffff)
15730 {
15731 _bfd_error_handler
15732 (_("%s offset too large for .eh_frame sdata4 encoding"),
15733 group->stub_sec->name);
15734 return FALSE;
15735 }
15736 bfd_put_32 (dynobj, val, p + 8);
15737 p += stub_eh_frame_size (group, align);
15738 }
15739 if (htab->glink != NULL && htab->glink->size != 0)
15740 {
15741 /* Offset to .glink. */
15742 val = (htab->glink->output_section->vma
15743 + htab->glink->output_offset
15744 + 8);
15745 val -= (htab->glink_eh_frame->output_section->vma
15746 + htab->glink_eh_frame->output_offset
15747 + (p + 8 - htab->glink_eh_frame->contents));
15748 if (val + 0x80000000 > 0xffffffff)
15749 {
15750 _bfd_error_handler
15751 (_("%s offset too large for .eh_frame sdata4 encoding"),
15752 htab->glink->name);
15753 return FALSE;
15754 }
15755 bfd_put_32 (dynobj, val, p + 8);
15756 p += (24 + align - 1) & -align;
15757 }
15758
15759 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15760 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15761 htab->glink_eh_frame,
15762 htab->glink_eh_frame->contents))
15763 return FALSE;
15764 }
15765
15766 /* We need to handle writing out multiple GOT sections ourselves,
15767 since we didn't add them to DYNOBJ. We know dynobj is the first
15768 bfd. */
15769 while ((dynobj = dynobj->link.next) != NULL)
15770 {
15771 asection *s;
15772
15773 if (!is_ppc64_elf (dynobj))
15774 continue;
15775
15776 s = ppc64_elf_tdata (dynobj)->got;
15777 if (s != NULL
15778 && s->size != 0
15779 && s->output_section != bfd_abs_section_ptr
15780 && !bfd_set_section_contents (output_bfd, s->output_section,
15781 s->contents, s->output_offset,
15782 s->size))
15783 return FALSE;
15784 s = ppc64_elf_tdata (dynobj)->relgot;
15785 if (s != NULL
15786 && s->size != 0
15787 && s->output_section != bfd_abs_section_ptr
15788 && !bfd_set_section_contents (output_bfd, s->output_section,
15789 s->contents, s->output_offset,
15790 s->size))
15791 return FALSE;
15792 }
15793
15794 return TRUE;
15795 }
15796
15797 #include "elf64-target.h"
15798
15799 /* FreeBSD support */
15800
15801 #undef TARGET_LITTLE_SYM
15802 #undef TARGET_LITTLE_NAME
15803
15804 #undef TARGET_BIG_SYM
15805 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15806 #undef TARGET_BIG_NAME
15807 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15808
15809 #undef ELF_OSABI
15810 #define ELF_OSABI ELFOSABI_FREEBSD
15811
15812 #undef elf64_bed
15813 #define elf64_bed elf64_powerpc_fbsd_bed
15814
15815 #include "elf64-target.h"
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