]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame_incremental - bfd/elf64-ppc.c
projects / thirdparty / binutils-gdb.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
* dw2gencfi.c (tc_cfi_endproc): Avoid "set but not used" error.
[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
... / ...
CommitLineData
1/* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25/* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29#include "sysdep.h"
30#include <stdarg.h>
31#include "bfd.h"
32#include "bfdlink.h"
33#include "libbfd.h"
34#include "elf-bfd.h"
35#include "elf/ppc64.h"
36#include "elf64-ppc.h"
37
38static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60#define TARGET_LITTLE_NAME "elf64-powerpcle"
61#define TARGET_BIG_SYM bfd_elf64_powerpc_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 0x1000
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_can_gc_sections 1
76#define elf_backend_can_refcount 1
77#define elf_backend_rela_normal 1
78#define elf_backend_default_execstack 0
79
80#define bfd_elf64_mkobject ppc64_elf_mkobject
81#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
85#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
86#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
87#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
89
90#define elf_backend_object_p ppc64_elf_object_p
91#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
92#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
93#define elf_backend_write_core_note ppc64_elf_write_core_note
94#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
95#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
96#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
97#define elf_backend_check_directives ppc64_elf_process_dot_syms
98#define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
99#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
100#define elf_backend_check_relocs ppc64_elf_check_relocs
101#define elf_backend_gc_keep ppc64_elf_gc_keep
102#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
103#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
104#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
105#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
106#define elf_backend_hide_symbol ppc64_elf_hide_symbol
107#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
108#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
109#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
110#define elf_backend_action_discarded ppc64_elf_action_discarded
111#define elf_backend_relocate_section ppc64_elf_relocate_section
112#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
113#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
114#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
115#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
116#define elf_backend_special_sections ppc64_elf_special_sections
117#define elf_backend_post_process_headers _bfd_elf_set_osabi
118
119/* The name of the dynamic interpreter. This is put in the .interp
120 section. */
121#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
122
123/* The size in bytes of an entry in the procedure linkage table. */
124#define PLT_ENTRY_SIZE 24
125
126/* The initial size of the plt reserved for the dynamic linker. */
127#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
128
129/* TOC base pointers offset from start of TOC. */
130#define TOC_BASE_OFF 0x8000
131
132/* Offset of tp and dtp pointers from start of TLS block. */
133#define TP_OFFSET 0x7000
134#define DTP_OFFSET 0x8000
135
136/* .plt call stub instructions. The normal stub is like this, but
137 sometimes the .plt entry crosses a 64k boundary and we need to
138 insert an addi to adjust r12. */
139#define PLT_CALL_STUB_SIZE (7*4)
140#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
141#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
142#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
143#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
144#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
145 /* ld %r11,xxx+16@l(%r12) */
146#define BCTR 0x4e800420 /* bctr */
147
148
149#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
150#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
151#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
152#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
153
154#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
155#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
156
157#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
158
159/* glink call stub instructions. We enter with the index in R0. */
160#define GLINK_CALL_STUB_SIZE (16*4)
161 /* 0: */
162 /* .quad plt0-1f */
163 /* __glink: */
164#define MFLR_R12 0x7d8802a6 /* mflr %12 */
165#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
166 /* 1: */
167#define MFLR_R11 0x7d6802a6 /* mflr %11 */
168#define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
169#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
170#define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
171 /* ld %11,0(%12) */
172 /* ld %2,8(%12) */
173 /* mtctr %11 */
174 /* ld %11,16(%12) */
175 /* bctr */
176
177/* Pad with this. */
178#define NOP 0x60000000
179
180/* Some other nops. */
181#define CROR_151515 0x4def7b82
182#define CROR_313131 0x4ffffb82
183
184/* .glink entries for the first 32k functions are two instructions. */
185#define LI_R0_0 0x38000000 /* li %r0,0 */
186#define B_DOT 0x48000000 /* b . */
187
188/* After that, we need two instructions to load the index, followed by
189 a branch. */
190#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
191#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
192
193/* Instructions used by the save and restore reg functions. */
194#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
195#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
196#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
197#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
198#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
199#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
200#define LI_R12_0 0x39800000 /* li %r12,0 */
201#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
202#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
203#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
204#define BLR 0x4e800020 /* blr */
205
206/* Since .opd is an array of descriptors and each entry will end up
207 with identical R_PPC64_RELATIVE relocs, there is really no need to
208 propagate .opd relocs; The dynamic linker should be taught to
209 relocate .opd without reloc entries. */
210#ifndef NO_OPD_RELOCS
211#define NO_OPD_RELOCS 0
212#endif
213\f
214#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
215
216/* Relocation HOWTO's. */
217static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
218
219static reloc_howto_type ppc64_elf_howto_raw[] = {
220 /* This reloc does nothing. */
221 HOWTO (R_PPC64_NONE, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_dont, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC64_NONE", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* A standard 32 bit relocation. */
236 HOWTO (R_PPC64_ADDR32, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 32, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR32", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0xffffffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* An absolute 26 bit branch; the lower two bits must be zero.
251 FIXME: we don't check that, we just clear them. */
252 HOWTO (R_PPC64_ADDR24, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 26, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR24", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0x03fffffc, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* A standard 16 bit relocation. */
267 HOWTO (R_PPC64_ADDR16, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_bitfield, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* A 16 bit relocation without overflow. */
282 HOWTO (R_PPC64_ADDR16_LO, /* type */
283 0, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_dont,/* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC64_ADDR16_LO", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xffff, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* Bits 16-31 of an address. */
297 HOWTO (R_PPC64_ADDR16_HI, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_PPC64_ADDR16_HI", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
312 bits, treated as a signed number, is negative. */
313 HOWTO (R_PPC64_ADDR16_HA, /* type */
314 16, /* rightshift */
315 1, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_dont, /* complain_on_overflow */
320 ppc64_elf_ha_reloc, /* special_function */
321 "R_PPC64_ADDR16_HA", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xffff, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch; the lower two bits must be zero.
328 FIXME: we don't check that, we just clear them. */
329 HOWTO (R_PPC64_ADDR14, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_branch_reloc, /* special_function */
337 "R_PPC64_ADDR14", /* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* An absolute 16 bit branch, for which bit 10 should be set to
344 indicate that the branch is expected to be taken. The lower two
345 bits must be zero. */
346 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc64_elf_brtaken_reloc, /* special_function */
354 "R_PPC64_ADDR14_BRTAKEN",/* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x0000fffc, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 /* An absolute 16 bit branch, for which bit 10 should be set to
361 indicate that the branch is not expected to be taken. The lower
362 two bits must be zero. */
363 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 FALSE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_bitfield, /* complain_on_overflow */
370 ppc64_elf_brtaken_reloc, /* special_function */
371 "R_PPC64_ADDR14_BRNTAKEN",/* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x0000fffc, /* dst_mask */
375 FALSE), /* pcrel_offset */
376
377 /* A relative 26 bit branch; the lower two bits must be zero. */
378 HOWTO (R_PPC64_REL24, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 26, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_branch_reloc, /* special_function */
386 "R_PPC64_REL24", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x03fffffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch; the lower two bits must be zero. */
393 HOWTO (R_PPC64_REL14, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_branch_reloc, /* special_function */
401 "R_PPC64_REL14", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* A relative 16 bit branch. Bit 10 should be set to indicate that
408 the branch is expected to be taken. The lower two bits must be
409 zero. */
410 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
411 0, /* rightshift */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 TRUE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc64_elf_brtaken_reloc, /* special_function */
418 "R_PPC64_REL14_BRTAKEN", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0x0000fffc, /* dst_mask */
422 TRUE), /* pcrel_offset */
423
424 /* A relative 16 bit branch. Bit 10 should be set to indicate that
425 the branch is not expected to be taken. The lower two bits must
426 be zero. */
427 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
428 0, /* rightshift */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 TRUE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_brtaken_reloc, /* special_function */
435 "R_PPC64_REL14_BRNTAKEN",/* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0x0000fffc, /* dst_mask */
439 TRUE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
442 symbol. */
443 HOWTO (R_PPC64_GOT16, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_signed, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_LO, /* type */
460 0, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont, /* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_LO", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HI, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HI", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
490 the symbol. */
491 HOWTO (R_PPC64_GOT16_HA, /* type */
492 16, /* rightshift */
493 1, /* size (0 = byte, 1 = short, 2 = long) */
494 16, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_dont,/* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GOT16_HA", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* This is used only by the dynamic linker. The symbol should exist
506 both in the object being run and in some shared library. The
507 dynamic linker copies the data addressed by the symbol from the
508 shared library into the object, because the object being
509 run has to have the data at some particular address. */
510 HOWTO (R_PPC64_COPY, /* type */
511 0, /* rightshift */
512 0, /* this one is variable size */
513 0, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_COPY", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Like R_PPC64_ADDR64, but used when setting global offset table
525 entries. */
526 HOWTO (R_PPC64_GLOB_DAT, /* type */
527 0, /* rightshift */
528 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
529 64, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_GLOB_DAT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 ONES (64), /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Created by the link editor. Marks a procedure linkage table
541 entry for a symbol. */
542 HOWTO (R_PPC64_JMP_SLOT, /* type */
543 0, /* rightshift */
544 0, /* size (0 = byte, 1 = short, 2 = long) */
545 0, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 ppc64_elf_unhandled_reloc, /* special_function */
550 "R_PPC64_JMP_SLOT", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 0, /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Used only by the dynamic linker. When the object is run, this
557 doubleword64 is set to the load address of the object, plus the
558 addend. */
559 HOWTO (R_PPC64_RELATIVE, /* type */
560 0, /* rightshift */
561 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
562 64, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_dont, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_RELATIVE", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 ONES (64), /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* Like R_PPC64_ADDR32, but may be unaligned. */
574 HOWTO (R_PPC64_UADDR32, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_bitfield, /* complain_on_overflow */
581 bfd_elf_generic_reloc, /* special_function */
582 "R_PPC64_UADDR32", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 0xffffffff, /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Like R_PPC64_ADDR16, but may be unaligned. */
589 HOWTO (R_PPC64_UADDR16, /* type */
590 0, /* rightshift */
591 1, /* size (0 = byte, 1 = short, 2 = long) */
592 16, /* bitsize */
593 FALSE, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_bitfield, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_UADDR16", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffff, /* dst_mask */
601 FALSE), /* pcrel_offset */
602
603 /* 32-bit PC relative. */
604 HOWTO (R_PPC64_REL32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 TRUE, /* pc_relative */
609 0, /* bitpos */
610 /* FIXME: Verify. Was complain_overflow_bitfield. */
611 complain_overflow_signed, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC64_REL32", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffffffff, /* dst_mask */
617 TRUE), /* pcrel_offset */
618
619 /* 32-bit relocation to the symbol's procedure linkage table. */
620 HOWTO (R_PPC64_PLT32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_bitfield, /* complain_on_overflow */
627 ppc64_elf_unhandled_reloc, /* special_function */
628 "R_PPC64_PLT32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
635 FIXME: R_PPC64_PLTREL32 not supported. */
636 HOWTO (R_PPC64_PLTREL32, /* type */
637 0, /* rightshift */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
639 32, /* bitsize */
640 TRUE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_signed, /* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 "R_PPC64_PLTREL32", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffffffff, /* dst_mask */
648 TRUE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_LO, /* type */
653 0, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_LO", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HI, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HI", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
683 the symbol. */
684 HOWTO (R_PPC64_PLT16_HA, /* type */
685 16, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 ppc64_elf_unhandled_reloc, /* special_function */
692 "R_PPC64_PLT16_HA", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* 16-bit section relative relocation. */
699 HOWTO (R_PPC64_SECTOFF, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_bitfield, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* Like R_PPC64_SECTOFF, but no overflow warning. */
714 HOWTO (R_PPC64_SECTOFF_LO, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_reloc, /* special_function */
722 "R_PPC64_SECTOFF_LO", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit upper half section relative relocation. */
729 HOWTO (R_PPC64_SECTOFF_HI, /* type */
730 16, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc64_elf_sectoff_reloc, /* special_function */
737 "R_PPC64_SECTOFF_HI", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half adjusted section relative relocation. */
744 HOWTO (R_PPC64_SECTOFF_HA, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc64_elf_sectoff_ha_reloc, /* special_function */
752 "R_PPC64_SECTOFF_HA", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* Like R_PPC64_REL24 without touching the two least significant bits. */
759 HOWTO (R_PPC64_REL30, /* type */
760 2, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 30, /* bitsize */
763 TRUE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_REL30", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xfffffffc, /* dst_mask */
771 TRUE), /* pcrel_offset */
772
773 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
774
775 /* A standard 64-bit relocation. */
776 HOWTO (R_PPC64_ADDR64, /* type */
777 0, /* rightshift */
778 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
779 64, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_dont, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_PPC64_ADDR64", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 ONES (64), /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* The bits 32-47 of an address. */
791 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHER", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 32-47 of an address, plus 1 if the contents of the low
806 16 bits, treated as a signed number, is negative. */
807 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
808 32, /* rightshift */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
810 16, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 ppc64_elf_ha_reloc, /* special_function */
815 "R_PPC64_ADDR16_HIGHERA", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* The bits 48-63 of an address. */
822 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHEST", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* The bits 48-63 of an address, plus 1 if the contents of the low
837 16 bits, treated as a signed number, is negative. */
838 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
839 48, /* rightshift */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
841 16, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 ppc64_elf_ha_reloc, /* special_function */
846 "R_PPC64_ADDR16_HIGHESTA", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* Like ADDR64, but may be unaligned. */
853 HOWTO (R_PPC64_UADDR64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_PPC64_UADDR64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* 64-bit relative relocation. */
868 HOWTO (R_PPC64_REL64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 TRUE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 bfd_elf_generic_reloc, /* special_function */
876 "R_PPC64_REL64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 TRUE), /* pcrel_offset */
881
882 /* 64-bit relocation to the symbol's procedure linkage table. */
883 HOWTO (R_PPC64_PLT64, /* type */
884 0, /* rightshift */
885 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
886 64, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_unhandled_reloc, /* special_function */
891 "R_PPC64_PLT64", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 ONES (64), /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* 64-bit PC relative relocation to the symbol's procedure linkage
898 table. */
899 /* FIXME: R_PPC64_PLTREL64 not supported. */
900 HOWTO (R_PPC64_PLTREL64, /* type */
901 0, /* rightshift */
902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
903 64, /* bitsize */
904 TRUE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 ppc64_elf_unhandled_reloc, /* special_function */
908 "R_PPC64_PLTREL64", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 ONES (64), /* dst_mask */
912 TRUE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation. */
915
916 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
917 HOWTO (R_PPC64_TOC16, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_signed, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation without overflow. */
932
933 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
934 HOWTO (R_PPC64_TOC16_LO, /* type */
935 0, /* rightshift */
936 1, /* size (0 = byte, 1 = short, 2 = long) */
937 16, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_toc_reloc, /* special_function */
942 "R_PPC64_TOC16_LO", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 0xffff, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 16 bit TOC-relative relocation, high 16 bits. */
949
950 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
951 HOWTO (R_PPC64_TOC16_HI, /* type */
952 16, /* rightshift */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
954 16, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc64_elf_toc_reloc, /* special_function */
959 "R_PPC64_TOC16_HI", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
966 contents of the low 16 bits, treated as a signed number, is
967 negative. */
968
969 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
970 HOWTO (R_PPC64_TOC16_HA, /* type */
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc64_elf_toc_ha_reloc, /* special_function */
978 "R_PPC64_TOC16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* 64-bit relocation; insert value of TOC base (.TOC.). */
985
986 /* R_PPC64_TOC 51 doubleword64 .TOC. */
987 HOWTO (R_PPC64_TOC, /* type */
988 0, /* rightshift */
989 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
990 64, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_bitfield, /* complain_on_overflow */
994 ppc64_elf_toc64_reloc, /* special_function */
995 "R_PPC64_TOC", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 ONES (64), /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like R_PPC64_GOT16, but also informs the link editor that the
1002 value to relocate may (!) refer to a PLT entry which the link
1003 editor (a) may replace with the symbol value. If the link editor
1004 is unable to fully resolve the symbol, it may (b) create a PLT
1005 entry and store the address to the new PLT entry in the GOT.
1006 This permits lazy resolution of function symbols at run time.
1007 The link editor may also skip all of this and just (c) emit a
1008 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1009 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_signed, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLTGOT16, but without overflow. */
1025 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1027 0, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_LO", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1041 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1042 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc64_elf_unhandled_reloc, /* special_function */
1050 "R_PPC64_PLTGOT16_HI", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1057 1 if the contents of the low 16 bits, treated as a signed number,
1058 is negative. */
1059 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1060 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1061 16, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_dont,/* complain_on_overflow */
1067 ppc64_elf_unhandled_reloc, /* special_function */
1068 "R_PPC64_PLTGOT16_HA", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_ADDR16_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_bitfield, /* complain_on_overflow */
1082 bfd_elf_generic_reloc, /* special_function */
1083 "R_PPC64_ADDR16_DS", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont,/* complain_on_overflow */
1097 bfd_elf_generic_reloc, /* special_function */
1098 "R_PPC64_ADDR16_LO_DS",/* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_GOT16_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_signed, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_GOT16_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont, /* complain_on_overflow */
1127 ppc64_elf_unhandled_reloc, /* special_function */
1128 "R_PPC64_GOT16_LO_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc64_elf_unhandled_reloc, /* special_function */
1143 "R_PPC64_PLT16_LO_DS", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_bitfield, /* complain_on_overflow */
1157 ppc64_elf_sectoff_reloc, /* special_function */
1158 "R_PPC64_SECTOFF_DS", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc64_elf_sectoff_reloc, /* special_function */
1173 "R_PPC64_SECTOFF_LO_DS",/* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1180 HOWTO (R_PPC64_TOC16_DS, /* type */
1181 0, /* rightshift */
1182 1, /* size (0 = byte, 1 = short, 2 = long) */
1183 16, /* bitsize */
1184 FALSE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_signed, /* complain_on_overflow */
1187 ppc64_elf_toc_reloc, /* special_function */
1188 "R_PPC64_TOC16_DS", /* name */
1189 FALSE, /* partial_inplace */
1190 0, /* src_mask */
1191 0xfffc, /* dst_mask */
1192 FALSE), /* pcrel_offset */
1193
1194 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1195 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 ppc64_elf_toc_reloc, /* special_function */
1203 "R_PPC64_TOC16_LO_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_signed, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_DS", /* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1226 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1227 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1228 0, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 ppc64_elf_unhandled_reloc, /* special_function */
1235 "R_PPC64_PLTGOT16_LO_DS",/* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xfffc, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Marker relocs for TLS. */
1242 HOWTO (R_PPC64_TLS,
1243 0, /* rightshift */
1244 2, /* size (0 = byte, 1 = short, 2 = long) */
1245 32, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 bfd_elf_generic_reloc, /* special_function */
1250 "R_PPC64_TLS", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 HOWTO (R_PPC64_TLSGD,
1257 0, /* rightshift */
1258 2, /* size (0 = byte, 1 = short, 2 = long) */
1259 32, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_dont, /* complain_on_overflow */
1263 bfd_elf_generic_reloc, /* special_function */
1264 "R_PPC64_TLSGD", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 HOWTO (R_PPC64_TLSLD,
1271 0, /* rightshift */
1272 2, /* size (0 = byte, 1 = short, 2 = long) */
1273 32, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont, /* complain_on_overflow */
1277 bfd_elf_generic_reloc, /* special_function */
1278 "R_PPC64_TLSLD", /* name */
1279 FALSE, /* partial_inplace */
1280 0, /* src_mask */
1281 0, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 /* Computes the load module index of the load module that contains the
1285 definition of its TLS sym. */
1286 HOWTO (R_PPC64_DTPMOD64,
1287 0, /* rightshift */
1288 4, /* size (0 = byte, 1 = short, 2 = long) */
1289 64, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_dont, /* complain_on_overflow */
1293 ppc64_elf_unhandled_reloc, /* special_function */
1294 "R_PPC64_DTPMOD64", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 ONES (64), /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* Computes a dtv-relative displacement, the difference between the value
1301 of sym+add and the base address of the thread-local storage block that
1302 contains the definition of sym, minus 0x8000. */
1303 HOWTO (R_PPC64_DTPREL64,
1304 0, /* rightshift */
1305 4, /* size (0 = byte, 1 = short, 2 = long) */
1306 64, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL64", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 ONES (64), /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* A 16 bit dtprel reloc. */
1318 HOWTO (R_PPC64_DTPREL16,
1319 0, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_signed, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16, but no overflow. */
1333 HOWTO (R_PPC64_DTPREL16_LO,
1334 0, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_LO", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HI,
1349 16, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HI", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HA,
1364 16, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HA", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1378 HOWTO (R_PPC64_DTPREL16_HIGHER,
1379 32, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_dont, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_HIGHER", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1393 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1394 32, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_dont, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_HIGHERA", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1408 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1409 48, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_DTPREL16_HIGHEST", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xffff, /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1423 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1424 48, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 FALSE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_dont, /* complain_on_overflow */
1430 ppc64_elf_unhandled_reloc, /* special_function */
1431 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 FALSE), /* pcrel_offset */
1436
1437 /* Like DTPREL16, but for insns with a DS field. */
1438 HOWTO (R_PPC64_DTPREL16_DS,
1439 0, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_signed, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_DTPREL16_DS", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xfffc, /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* Like DTPREL16_DS, but no overflow. */
1453 HOWTO (R_PPC64_DTPREL16_LO_DS,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_dont, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_DTPREL16_LO_DS", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xfffc, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Computes a tp-relative displacement, the difference between the value of
1468 sym+add and the value of the thread pointer (r13). */
1469 HOWTO (R_PPC64_TPREL64,
1470 0, /* rightshift */
1471 4, /* size (0 = byte, 1 = short, 2 = long) */
1472 64, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL64", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 ONES (64), /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* A 16 bit tprel reloc. */
1484 HOWTO (R_PPC64_TPREL16,
1485 0, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_signed, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16, but no overflow. */
1499 HOWTO (R_PPC64_TPREL16_LO,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_LO", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_LO, but next higher group of 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HI,
1515 16, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HI", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HI, but adjust for low 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HA,
1530 16, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HA", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16_HI, but next higher group of 16 bits. */
1544 HOWTO (R_PPC64_TPREL16_HIGHER,
1545 32, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_dont, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_HIGHER", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xffff, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1559 HOWTO (R_PPC64_TPREL16_HIGHERA,
1560 32, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_dont, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_HIGHERA", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xffff, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1574 HOWTO (R_PPC64_TPREL16_HIGHEST,
1575 48, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_dont, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_TPREL16_HIGHEST", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1589 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1590 48, /* rightshift */
1591 1, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc64_elf_unhandled_reloc, /* special_function */
1597 "R_PPC64_TPREL16_HIGHESTA", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* Like TPREL16, but for insns with a DS field. */
1604 HOWTO (R_PPC64_TPREL16_DS,
1605 0, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_signed, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_TPREL16_DS", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xfffc, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like TPREL16_DS, but no overflow. */
1619 HOWTO (R_PPC64_TPREL16_LO_DS,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_TPREL16_LO_DS", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xfffc, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1634 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1635 to the first entry relative to the TOC base (r2). */
1636 HOWTO (R_PPC64_GOT_TLSGD16,
1637 0, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_signed, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSGD16", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Like GOT_TLSGD16, but no overflow. */
1651 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1652 0, /* rightshift */
1653 1, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 FALSE, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_dont, /* complain_on_overflow */
1658 ppc64_elf_unhandled_reloc, /* special_function */
1659 "R_PPC64_GOT_TLSGD16_LO", /* name */
1660 FALSE, /* partial_inplace */
1661 0, /* src_mask */
1662 0xffff, /* dst_mask */
1663 FALSE), /* pcrel_offset */
1664
1665 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1666 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1667 16, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_dont, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSGD16_HI", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1681 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1682 16, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSGD16_HA", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1696 with values (sym+add)@dtpmod and zero, and computes the offset to the
1697 first entry relative to the TOC base (r2). */
1698 HOWTO (R_PPC64_GOT_TLSLD16,
1699 0, /* rightshift */
1700 1, /* size (0 = byte, 1 = short, 2 = long) */
1701 16, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
1704 complain_overflow_signed, /* complain_on_overflow */
1705 ppc64_elf_unhandled_reloc, /* special_function */
1706 "R_PPC64_GOT_TLSLD16", /* name */
1707 FALSE, /* partial_inplace */
1708 0, /* src_mask */
1709 0xffff, /* dst_mask */
1710 FALSE), /* pcrel_offset */
1711
1712 /* Like GOT_TLSLD16, but no overflow. */
1713 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1714 0, /* rightshift */
1715 1, /* size (0 = byte, 1 = short, 2 = long) */
1716 16, /* bitsize */
1717 FALSE, /* pc_relative */
1718 0, /* bitpos */
1719 complain_overflow_dont, /* complain_on_overflow */
1720 ppc64_elf_unhandled_reloc, /* special_function */
1721 "R_PPC64_GOT_TLSLD16_LO", /* name */
1722 FALSE, /* partial_inplace */
1723 0, /* src_mask */
1724 0xffff, /* dst_mask */
1725 FALSE), /* pcrel_offset */
1726
1727 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1728 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1729 16, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_dont, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_TLSLD16_HI", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xffff, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1743 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1744 16, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_TLSLD16_HA", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xffff, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1758 the offset to the entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_DTPREL16_DS", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xfffc, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_DTPREL16_DS, but no overflow. */
1774 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xfffc, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_dont, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_DTPREL16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_DTPREL16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1819 offset to the entry relative to the TOC base (r2). */
1820 HOWTO (R_PPC64_GOT_TPREL16_DS,
1821 0, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_signed, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_TPREL16_DS", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xfffc, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* Like GOT_TPREL16_DS, but no overflow. */
1835 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1850 HOWTO (R_PPC64_GOT_TPREL16_HI,
1851 16, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_dont, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_TPREL16_HI", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xffff, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1865 HOWTO (R_PPC64_GOT_TPREL16_HA,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_dont, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_TPREL16_HA", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 HOWTO (R_PPC64_JMP_IREL, /* type */
1880 0, /* rightshift */
1881 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1882 0, /* bitsize */
1883 FALSE, /* pc_relative */
1884 0, /* bitpos */
1885 complain_overflow_dont, /* complain_on_overflow */
1886 ppc64_elf_unhandled_reloc, /* special_function */
1887 "R_PPC64_JMP_IREL", /* name */
1888 FALSE, /* partial_inplace */
1889 0, /* src_mask */
1890 0, /* dst_mask */
1891 FALSE), /* pcrel_offset */
1892
1893 HOWTO (R_PPC64_IRELATIVE, /* type */
1894 0, /* rightshift */
1895 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1896 64, /* bitsize */
1897 FALSE, /* pc_relative */
1898 0, /* bitpos */
1899 complain_overflow_dont, /* complain_on_overflow */
1900 bfd_elf_generic_reloc, /* special_function */
1901 "R_PPC64_IRELATIVE", /* name */
1902 FALSE, /* partial_inplace */
1903 0, /* src_mask */
1904 ONES (64), /* dst_mask */
1905 FALSE), /* pcrel_offset */
1906
1907 /* A 16 bit relative relocation. */
1908 HOWTO (R_PPC64_REL16, /* type */
1909 0, /* rightshift */
1910 1, /* size (0 = byte, 1 = short, 2 = long) */
1911 16, /* bitsize */
1912 TRUE, /* pc_relative */
1913 0, /* bitpos */
1914 complain_overflow_bitfield, /* complain_on_overflow */
1915 bfd_elf_generic_reloc, /* special_function */
1916 "R_PPC64_REL16", /* name */
1917 FALSE, /* partial_inplace */
1918 0, /* src_mask */
1919 0xffff, /* dst_mask */
1920 TRUE), /* pcrel_offset */
1921
1922 /* A 16 bit relative relocation without overflow. */
1923 HOWTO (R_PPC64_REL16_LO, /* type */
1924 0, /* rightshift */
1925 1, /* size (0 = byte, 1 = short, 2 = long) */
1926 16, /* bitsize */
1927 TRUE, /* pc_relative */
1928 0, /* bitpos */
1929 complain_overflow_dont,/* complain_on_overflow */
1930 bfd_elf_generic_reloc, /* special_function */
1931 "R_PPC64_REL16_LO", /* name */
1932 FALSE, /* partial_inplace */
1933 0, /* src_mask */
1934 0xffff, /* dst_mask */
1935 TRUE), /* pcrel_offset */
1936
1937 /* The high order 16 bits of a relative address. */
1938 HOWTO (R_PPC64_REL16_HI, /* type */
1939 16, /* rightshift */
1940 1, /* size (0 = byte, 1 = short, 2 = long) */
1941 16, /* bitsize */
1942 TRUE, /* pc_relative */
1943 0, /* bitpos */
1944 complain_overflow_dont, /* complain_on_overflow */
1945 bfd_elf_generic_reloc, /* special_function */
1946 "R_PPC64_REL16_HI", /* name */
1947 FALSE, /* partial_inplace */
1948 0, /* src_mask */
1949 0xffff, /* dst_mask */
1950 TRUE), /* pcrel_offset */
1951
1952 /* The high order 16 bits of a relative address, plus 1 if the contents of
1953 the low 16 bits, treated as a signed number, is negative. */
1954 HOWTO (R_PPC64_REL16_HA, /* type */
1955 16, /* rightshift */
1956 1, /* size (0 = byte, 1 = short, 2 = long) */
1957 16, /* bitsize */
1958 TRUE, /* pc_relative */
1959 0, /* bitpos */
1960 complain_overflow_dont, /* complain_on_overflow */
1961 ppc64_elf_ha_reloc, /* special_function */
1962 "R_PPC64_REL16_HA", /* name */
1963 FALSE, /* partial_inplace */
1964 0, /* src_mask */
1965 0xffff, /* dst_mask */
1966 TRUE), /* pcrel_offset */
1967
1968 /* GNU extension to record C++ vtable hierarchy. */
1969 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1970 0, /* rightshift */
1971 0, /* size (0 = byte, 1 = short, 2 = long) */
1972 0, /* bitsize */
1973 FALSE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_dont, /* complain_on_overflow */
1976 NULL, /* special_function */
1977 "R_PPC64_GNU_VTINHERIT", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0, /* dst_mask */
1981 FALSE), /* pcrel_offset */
1982
1983 /* GNU extension to record C++ vtable member usage. */
1984 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1985 0, /* rightshift */
1986 0, /* size (0 = byte, 1 = short, 2 = long) */
1987 0, /* bitsize */
1988 FALSE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont, /* complain_on_overflow */
1991 NULL, /* special_function */
1992 "R_PPC64_GNU_VTENTRY", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0, /* dst_mask */
1996 FALSE), /* pcrel_offset */
1997};
1998
1999\f
2000/* Initialize the ppc64_elf_howto_table, so that linear accesses can
2001 be done. */
2002
2003static void
2004ppc_howto_init (void)
2005{
2006 unsigned int i, type;
2007
2008 for (i = 0;
2009 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2010 i++)
2011 {
2012 type = ppc64_elf_howto_raw[i].type;
2013 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2014 / sizeof (ppc64_elf_howto_table[0])));
2015 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2016 }
2017}
2018
2019static reloc_howto_type *
2020ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2021 bfd_reloc_code_real_type code)
2022{
2023 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2024
2025 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2026 /* Initialize howto table if needed. */
2027 ppc_howto_init ();
2028
2029 switch (code)
2030 {
2031 default:
2032 return NULL;
2033
2034 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2035 break;
2036 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2037 break;
2038 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2039 break;
2040 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2041 break;
2042 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2043 break;
2044 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2045 break;
2046 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2047 break;
2048 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2053 break;
2054 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2055 break;
2056 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2059 break;
2060 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2061 break;
2062 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2063 break;
2064 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2065 break;
2066 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2067 break;
2068 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2069 break;
2070 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2071 break;
2072 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2073 break;
2074 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2075 break;
2076 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2077 break;
2078 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2079 break;
2080 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2081 break;
2082 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2083 break;
2084 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2085 break;
2086 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2087 break;
2088 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2089 break;
2090 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2091 break;
2092 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2093 break;
2094 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2103 break;
2104 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2105 break;
2106 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2107 break;
2108 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2109 break;
2110 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2111 break;
2112 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2117 break;
2118 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2119 break;
2120 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2127 break;
2128 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2131 break;
2132 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2135 break;
2136 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2141 break;
2142 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2145 break;
2146 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2149 break;
2150 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2151 break;
2152 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2153 break;
2154 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2155 break;
2156 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2157 break;
2158 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2165 break;
2166 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2167 break;
2168 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2177 break;
2178 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2201 break;
2202 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2209 break;
2210 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2221 break;
2222 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2233 break;
2234 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2235 break;
2236 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2237 break;
2238 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2239 break;
2240 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2241 break;
2242 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2243 break;
2244 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2245 break;
2246 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2247 break;
2248 }
2249
2250 return ppc64_elf_howto_table[r];
2251};
2252
2253static reloc_howto_type *
2254ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2255 const char *r_name)
2256{
2257 unsigned int i;
2258
2259 for (i = 0;
2260 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2261 i++)
2262 if (ppc64_elf_howto_raw[i].name != NULL
2263 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2264 return &ppc64_elf_howto_raw[i];
2265
2266 return NULL;
2267}
2268
2269/* Set the howto pointer for a PowerPC ELF reloc. */
2270
2271static void
2272ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2273 Elf_Internal_Rela *dst)
2274{
2275 unsigned int type;
2276
2277 /* Initialize howto table if needed. */
2278 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2279 ppc_howto_init ();
2280
2281 type = ELF64_R_TYPE (dst->r_info);
2282 if (type >= (sizeof (ppc64_elf_howto_table)
2283 / sizeof (ppc64_elf_howto_table[0])))
2284 {
2285 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2286 abfd, (int) type);
2287 type = R_PPC64_NONE;
2288 }
2289 cache_ptr->howto = ppc64_elf_howto_table[type];
2290}
2291
2292/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2293
2294static bfd_reloc_status_type
2295ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2296 void *data, asection *input_section,
2297 bfd *output_bfd, char **error_message)
2298{
2299 /* If this is a relocatable link (output_bfd test tells us), just
2300 call the generic function. Any adjustment will be done at final
2301 link time. */
2302 if (output_bfd != NULL)
2303 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2304 input_section, output_bfd, error_message);
2305
2306 /* Adjust the addend for sign extension of the low 16 bits.
2307 We won't actually be using the low 16 bits, so trashing them
2308 doesn't matter. */
2309 reloc_entry->addend += 0x8000;
2310 return bfd_reloc_continue;
2311}
2312
2313static bfd_reloc_status_type
2314ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2315 void *data, asection *input_section,
2316 bfd *output_bfd, char **error_message)
2317{
2318 if (output_bfd != NULL)
2319 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2320 input_section, output_bfd, error_message);
2321
2322 if (strcmp (symbol->section->name, ".opd") == 0
2323 && (symbol->section->owner->flags & DYNAMIC) == 0)
2324 {
2325 bfd_vma dest = opd_entry_value (symbol->section,
2326 symbol->value + reloc_entry->addend,
2327 NULL, NULL);
2328 if (dest != (bfd_vma) -1)
2329 reloc_entry->addend = dest - (symbol->value
2330 + symbol->section->output_section->vma
2331 + symbol->section->output_offset);
2332 }
2333 return bfd_reloc_continue;
2334}
2335
2336static bfd_reloc_status_type
2337ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340{
2341 long insn;
2342 enum elf_ppc64_reloc_type r_type;
2343 bfd_size_type octets;
2344 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2345 bfd_boolean is_power4 = FALSE;
2346
2347 /* If this is a relocatable link (output_bfd test tells us), just
2348 call the generic function. Any adjustment will be done at final
2349 link time. */
2350 if (output_bfd != NULL)
2351 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2352 input_section, output_bfd, error_message);
2353
2354 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2355 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2356 insn &= ~(0x01 << 21);
2357 r_type = reloc_entry->howto->type;
2358 if (r_type == R_PPC64_ADDR14_BRTAKEN
2359 || r_type == R_PPC64_REL14_BRTAKEN)
2360 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2361
2362 if (is_power4)
2363 {
2364 /* Set 'a' bit. This is 0b00010 in BO field for branch
2365 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2366 for branch on CTR insns (BO == 1a00t or 1a01t). */
2367 if ((insn & (0x14 << 21)) == (0x04 << 21))
2368 insn |= 0x02 << 21;
2369 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2370 insn |= 0x08 << 21;
2371 else
2372 goto out;
2373 }
2374 else
2375 {
2376 bfd_vma target = 0;
2377 bfd_vma from;
2378
2379 if (!bfd_is_com_section (symbol->section))
2380 target = symbol->value;
2381 target += symbol->section->output_section->vma;
2382 target += symbol->section->output_offset;
2383 target += reloc_entry->addend;
2384
2385 from = (reloc_entry->address
2386 + input_section->output_offset
2387 + input_section->output_section->vma);
2388
2389 /* Invert 'y' bit if not the default. */
2390 if ((bfd_signed_vma) (target - from) < 0)
2391 insn ^= 0x01 << 21;
2392 }
2393 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2394 out:
2395 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2396 input_section, output_bfd, error_message);
2397}
2398
2399static bfd_reloc_status_type
2400ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2401 void *data, asection *input_section,
2402 bfd *output_bfd, char **error_message)
2403{
2404 /* If this is a relocatable link (output_bfd test tells us), just
2405 call the generic function. Any adjustment will be done at final
2406 link time. */
2407 if (output_bfd != NULL)
2408 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2409 input_section, output_bfd, error_message);
2410
2411 /* Subtract the symbol section base address. */
2412 reloc_entry->addend -= symbol->section->output_section->vma;
2413 return bfd_reloc_continue;
2414}
2415
2416static bfd_reloc_status_type
2417ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2418 void *data, asection *input_section,
2419 bfd *output_bfd, char **error_message)
2420{
2421 /* If this is a relocatable link (output_bfd test tells us), just
2422 call the generic function. Any adjustment will be done at final
2423 link time. */
2424 if (output_bfd != NULL)
2425 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2426 input_section, output_bfd, error_message);
2427
2428 /* Subtract the symbol section base address. */
2429 reloc_entry->addend -= symbol->section->output_section->vma;
2430
2431 /* Adjust the addend for sign extension of the low 16 bits. */
2432 reloc_entry->addend += 0x8000;
2433 return bfd_reloc_continue;
2434}
2435
2436static bfd_reloc_status_type
2437ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2438 void *data, asection *input_section,
2439 bfd *output_bfd, char **error_message)
2440{
2441 bfd_vma TOCstart;
2442
2443 /* If this is a relocatable link (output_bfd test tells us), just
2444 call the generic function. Any adjustment will be done at final
2445 link time. */
2446 if (output_bfd != NULL)
2447 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2448 input_section, output_bfd, error_message);
2449
2450 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2451 if (TOCstart == 0)
2452 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2453
2454 /* Subtract the TOC base address. */
2455 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2456 return bfd_reloc_continue;
2457}
2458
2459static bfd_reloc_status_type
2460ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463{
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479
2480 /* Adjust the addend for sign extension of the low 16 bits. */
2481 reloc_entry->addend += 0x8000;
2482 return bfd_reloc_continue;
2483}
2484
2485static bfd_reloc_status_type
2486ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2487 void *data, asection *input_section,
2488 bfd *output_bfd, char **error_message)
2489{
2490 bfd_vma TOCstart;
2491 bfd_size_type octets;
2492
2493 /* If this is a relocatable link (output_bfd test tells us), just
2494 call the generic function. Any adjustment will be done at final
2495 link time. */
2496 if (output_bfd != NULL)
2497 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2498 input_section, output_bfd, error_message);
2499
2500 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2501 if (TOCstart == 0)
2502 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2503
2504 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2505 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2506 return bfd_reloc_ok;
2507}
2508
2509static bfd_reloc_status_type
2510ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2511 void *data, asection *input_section,
2512 bfd *output_bfd, char **error_message)
2513{
2514 /* If this is a relocatable link (output_bfd test tells us), just
2515 call the generic function. Any adjustment will be done at final
2516 link time. */
2517 if (output_bfd != NULL)
2518 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2519 input_section, output_bfd, error_message);
2520
2521 if (error_message != NULL)
2522 {
2523 static char buf[60];
2524 sprintf (buf, "generic linker can't handle %s",
2525 reloc_entry->howto->name);
2526 *error_message = buf;
2527 }
2528 return bfd_reloc_dangerous;
2529}
2530
2531/* Track GOT entries needed for a given symbol. We might need more
2532 than one got entry per symbol. */
2533struct got_entry
2534{
2535 struct got_entry *next;
2536
2537 /* The symbol addend that we'll be placing in the GOT. */
2538 bfd_vma addend;
2539
2540 /* Unlike other ELF targets, we use separate GOT entries for the same
2541 symbol referenced from different input files. This is to support
2542 automatic multiple TOC/GOT sections, where the TOC base can vary
2543 from one input file to another. After partitioning into TOC groups
2544 we merge entries within the group.
2545
2546 Point to the BFD owning this GOT entry. */
2547 bfd *owner;
2548
2549 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2550 TLS_TPREL or TLS_DTPREL for tls entries. */
2551 unsigned char tls_type;
2552
2553 /* Non-zero if got.ent points to real entry. */
2554 unsigned char is_indirect;
2555
2556 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2557 union
2558 {
2559 bfd_signed_vma refcount;
2560 bfd_vma offset;
2561 struct got_entry *ent;
2562 } got;
2563};
2564
2565/* The same for PLT. */
2566struct plt_entry
2567{
2568 struct plt_entry *next;
2569
2570 bfd_vma addend;
2571
2572 union
2573 {
2574 bfd_signed_vma refcount;
2575 bfd_vma offset;
2576 } plt;
2577};
2578
2579struct ppc64_elf_obj_tdata
2580{
2581 struct elf_obj_tdata elf;
2582
2583 /* Shortcuts to dynamic linker sections. */
2584 asection *got;
2585 asection *relgot;
2586
2587 /* Used during garbage collection. We attach global symbols defined
2588 on removed .opd entries to this section so that the sym is removed. */
2589 asection *deleted_section;
2590
2591 /* TLS local dynamic got entry handling. Support for multiple GOT
2592 sections means we potentially need one of these for each input bfd. */
2593 struct got_entry tlsld_got;
2594
2595 /* A copy of relocs before they are modified for --emit-relocs. */
2596 Elf_Internal_Rela *opd_relocs;
2597
2598 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2599 the reloc to be in the range -32768 to 32767. */
2600 unsigned int has_small_toc_reloc;
2601};
2602
2603#define ppc64_elf_tdata(bfd) \
2604 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2605
2606#define ppc64_tlsld_got(bfd) \
2607 (&ppc64_elf_tdata (bfd)->tlsld_got)
2608
2609#define is_ppc64_elf(bfd) \
2610 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2611 && elf_object_id (bfd) == PPC64_ELF_DATA)
2612
2613/* Override the generic function because we store some extras. */
2614
2615static bfd_boolean
2616ppc64_elf_mkobject (bfd *abfd)
2617{
2618 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2619 PPC64_ELF_DATA);
2620}
2621
2622/* Fix bad default arch selected for a 64 bit input bfd when the
2623 default is 32 bit. */
2624
2625static bfd_boolean
2626ppc64_elf_object_p (bfd *abfd)
2627{
2628 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2629 {
2630 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2631
2632 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2633 {
2634 /* Relies on arch after 32 bit default being 64 bit default. */
2635 abfd->arch_info = abfd->arch_info->next;
2636 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2637 }
2638 }
2639 return TRUE;
2640}
2641
2642/* Support for core dump NOTE sections. */
2643
2644static bfd_boolean
2645ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2646{
2647 size_t offset, size;
2648
2649 if (note->descsz != 504)
2650 return FALSE;
2651
2652 /* pr_cursig */
2653 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2654
2655 /* pr_pid */
2656 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2657
2658 /* pr_reg */
2659 offset = 112;
2660 size = 384;
2661
2662 /* Make a ".reg/999" section. */
2663 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2664 size, note->descpos + offset);
2665}
2666
2667static bfd_boolean
2668ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2669{
2670 if (note->descsz != 136)
2671 return FALSE;
2672
2673 elf_tdata (abfd)->core_program
2674 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2675 elf_tdata (abfd)->core_command
2676 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2677
2678 return TRUE;
2679}
2680
2681static char *
2682ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2683 ...)
2684{
2685 switch (note_type)
2686 {
2687 default:
2688 return NULL;
2689
2690 case NT_PRPSINFO:
2691 {
2692 char data[136];
2693 va_list ap;
2694
2695 va_start (ap, note_type);
2696 memset (data, 0, 40);
2697 strncpy (data + 40, va_arg (ap, const char *), 16);
2698 strncpy (data + 56, va_arg (ap, const char *), 80);
2699 va_end (ap);
2700 return elfcore_write_note (abfd, buf, bufsiz,
2701 "CORE", note_type, data, sizeof (data));
2702 }
2703
2704 case NT_PRSTATUS:
2705 {
2706 char data[504];
2707 va_list ap;
2708 long pid;
2709 int cursig;
2710 const void *greg;
2711
2712 va_start (ap, note_type);
2713 memset (data, 0, 112);
2714 pid = va_arg (ap, long);
2715 bfd_put_32 (abfd, pid, data + 32);
2716 cursig = va_arg (ap, int);
2717 bfd_put_16 (abfd, cursig, data + 12);
2718 greg = va_arg (ap, const void *);
2719 memcpy (data + 112, greg, 384);
2720 memset (data + 496, 0, 8);
2721 va_end (ap);
2722 return elfcore_write_note (abfd, buf, bufsiz,
2723 "CORE", note_type, data, sizeof (data));
2724 }
2725 }
2726}
2727
2728/* Merge backend specific data from an object file to the output
2729 object file when linking. */
2730
2731static bfd_boolean
2732ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2733{
2734 /* Check if we have the same endianess. */
2735 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2736 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2737 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2738 {
2739 const char *msg;
2740
2741 if (bfd_big_endian (ibfd))
2742 msg = _("%B: compiled for a big endian system "
2743 "and target is little endian");
2744 else
2745 msg = _("%B: compiled for a little endian system "
2746 "and target is big endian");
2747
2748 (*_bfd_error_handler) (msg, ibfd);
2749
2750 bfd_set_error (bfd_error_wrong_format);
2751 return FALSE;
2752 }
2753
2754 return TRUE;
2755}
2756
2757/* Add extra PPC sections. */
2758
2759static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760{
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768};
2769
2770enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774};
2775
2776struct _ppc64_elf_section_data
2777{
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808};
2809
2810#define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813static bfd_boolean
2814ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815{
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828}
2829
2830static struct _opd_sec_data *
2831get_opd_info (asection * sec)
2832{
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838}
2839\f
2840/* Parameters for the qsort hook. */
2841static bfd_boolean synthetic_relocatable;
2842
2843/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845static int
2846compare_symbols (const void *ap, const void *bp)
2847{
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920}
2921
2922/* Search SYMS for a symbol of the given VALUE. */
2923
2924static asymbol *
2925sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926{
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960}
2961
2962static bfd_boolean
2963section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964{
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969}
2970
2971/* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974static long
2975ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979{
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3321 info file. */
3322 if ((sec->flags & SEC_ALLOC) == 0)
3323 break;
3324 if ((sec->flags & SEC_CODE) != 0)
3325 s->section = sec;
3326 }
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3329 s->name = names;
3330 *names++ = '.';
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3333 names += len + 1;
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3337 s++;
3338 }
3339 }
3340 free (contents);
3341
3342 if (glink != NULL && relplt != NULL)
3343 {
3344 if (resolv_vma)
3345 {
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3348 s->the_bfd = abfd;
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3350 s->section = glink;
3351 s->value = resolv_vma - glink->vma;
3352 s->name = names;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3355 s++;
3356 count++;
3357 }
3358
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3366
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3377 {
3378 size_t len;
3379
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3386 s->section = glink;
3387 s->value = glink_vma - glink->vma;
3388 s->name = names;
3389 s->udata.p = NULL;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3392 names += len;
3393 if (p->addend != 0)
3394 {
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3399 }
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3402 s++;
3403 glink_vma += 8;
3404 if (i >= 0x8000)
3405 glink_vma += 4;
3406 }
3407 count += plt_count;
3408 }
3409 }
3410
3411 done:
3412 free (syms);
3413 return count;
3414}
3415\f
3416/* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3422 called.
3423
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3427
3428 . .text
3429 . x:
3430 . bl .foo
3431 . nop
3432
3433 The function definition in another object file might be:
3434
3435 . .section .opd
3436 . foo: .quad .foo
3437 . .quad .TOC.@tocbase
3438 . .quad 0
3439 .
3440 . .text
3441 . .foo: blr
3442
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3448
3449 . x:
3450 . bl .foo_stub
3451 . ld 2,40(1)
3452 .
3453 .
3454 . .foo_stub:
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3458 . ld 11,0(12)
3459 . ld 2,8(12)
3460 . mtctr 11
3461 . ld 11,16(12)
3462 . bctr
3463 .
3464 . .section .plt
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3466
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3469 copying.
3470
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3483
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3487
3488/* The linker needs to keep track of the number of relocs that it
3489 decides to copy as dynamic relocs in check_relocs for each symbol.
3490 This is so that it can later discard them if they are found to be
3491 unnecessary. We store the information in a field extending the
3492 regular ELF linker hash table. */
3493
3494struct ppc_dyn_relocs
3495{
3496 struct ppc_dyn_relocs *next;
3497
3498 /* The input section of the reloc. */
3499 asection *sec;
3500
3501 /* Total number of relocs copied for the input section. */
3502 bfd_size_type count;
3503
3504 /* Number of pc-relative relocs copied for the input section. */
3505 bfd_size_type pc_count;
3506};
3507
3508/* Of those relocs that might be copied as dynamic relocs, this function
3509 selects those that must be copied when linking a shared library,
3510 even when the symbol is local. */
3511
3512static int
3513must_be_dyn_reloc (struct bfd_link_info *info,
3514 enum elf_ppc64_reloc_type r_type)
3515{
3516 switch (r_type)
3517 {
3518 default:
3519 return 1;
3520
3521 case R_PPC64_REL32:
3522 case R_PPC64_REL64:
3523 case R_PPC64_REL30:
3524 return 0;
3525
3526 case R_PPC64_TPREL16:
3527 case R_PPC64_TPREL16_LO:
3528 case R_PPC64_TPREL16_HI:
3529 case R_PPC64_TPREL16_HA:
3530 case R_PPC64_TPREL16_DS:
3531 case R_PPC64_TPREL16_LO_DS:
3532 case R_PPC64_TPREL16_HIGHER:
3533 case R_PPC64_TPREL16_HIGHERA:
3534 case R_PPC64_TPREL16_HIGHEST:
3535 case R_PPC64_TPREL16_HIGHESTA:
3536 case R_PPC64_TPREL64:
3537 return !info->executable;
3538 }
3539}
3540
3541/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3542 copying dynamic variables from a shared lib into an app's dynbss
3543 section, and instead use a dynamic relocation to point into the
3544 shared lib. With code that gcc generates, it's vital that this be
3545 enabled; In the PowerPC64 ABI, the address of a function is actually
3546 the address of a function descriptor, which resides in the .opd
3547 section. gcc uses the descriptor directly rather than going via the
3548 GOT as some other ABI's do, which means that initialized function
3549 pointers must reference the descriptor. Thus, a function pointer
3550 initialized to the address of a function in a shared library will
3551 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3552 redefines the function descriptor symbol to point to the copy. This
3553 presents a problem as a plt entry for that function is also
3554 initialized from the function descriptor symbol and the copy reloc
3555 may not be initialized first. */
3556#define ELIMINATE_COPY_RELOCS 1
3557
3558/* Section name for stubs is the associated section name plus this
3559 string. */
3560#define STUB_SUFFIX ".stub"
3561
3562/* Linker stubs.
3563 ppc_stub_long_branch:
3564 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3565 destination, but a 24 bit branch in a stub section will reach.
3566 . b dest
3567
3568 ppc_stub_plt_branch:
3569 Similar to the above, but a 24 bit branch in the stub section won't
3570 reach its destination.
3571 . addis %r12,%r2,xxx@toc@ha
3572 . ld %r11,xxx@toc@l(%r12)
3573 . mtctr %r11
3574 . bctr
3575
3576 ppc_stub_plt_call:
3577 Used to call a function in a shared library. If it so happens that
3578 the plt entry referenced crosses a 64k boundary, then an extra
3579 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3580 . addis %r12,%r2,xxx@toc@ha
3581 . std %r2,40(%r1)
3582 . ld %r11,xxx+0@toc@l(%r12)
3583 . mtctr %r11
3584 . ld %r2,xxx+8@toc@l(%r12)
3585 . ld %r11,xxx+16@toc@l(%r12)
3586 . bctr
3587
3588 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3589 code to adjust the value and save r2 to support multiple toc sections.
3590 A ppc_stub_long_branch with an r2 offset looks like:
3591 . std %r2,40(%r1)
3592 . addis %r2,%r2,off@ha
3593 . addi %r2,%r2,off@l
3594 . b dest
3595
3596 A ppc_stub_plt_branch with an r2 offset looks like:
3597 . std %r2,40(%r1)
3598 . addis %r12,%r2,xxx@toc@ha
3599 . ld %r11,xxx@toc@l(%r12)
3600 . addis %r2,%r2,off@ha
3601 . addi %r2,%r2,off@l
3602 . mtctr %r11
3603 . bctr
3604
3605 In cases where the "addis" instruction would add zero, the "addis" is
3606 omitted and following instructions modified slightly in some cases.
3607*/
3608
3609enum ppc_stub_type {
3610 ppc_stub_none,
3611 ppc_stub_long_branch,
3612 ppc_stub_long_branch_r2off,
3613 ppc_stub_plt_branch,
3614 ppc_stub_plt_branch_r2off,
3615 ppc_stub_plt_call
3616};
3617
3618struct ppc_stub_hash_entry {
3619
3620 /* Base hash table entry structure. */
3621 struct bfd_hash_entry root;
3622
3623 enum ppc_stub_type stub_type;
3624
3625 /* The stub section. */
3626 asection *stub_sec;
3627
3628 /* Offset within stub_sec of the beginning of this stub. */
3629 bfd_vma stub_offset;
3630
3631 /* Given the symbol's value and its section we can determine its final
3632 value when building the stubs (so the stub knows where to jump. */
3633 bfd_vma target_value;
3634 asection *target_section;
3635
3636 /* The symbol table entry, if any, that this was derived from. */
3637 struct ppc_link_hash_entry *h;
3638 struct plt_entry *plt_ent;
3639
3640 /* And the reloc addend that this was derived from. */
3641 bfd_vma addend;
3642
3643 /* Where this stub is being called from, or, in the case of combined
3644 stub sections, the first input section in the group. */
3645 asection *id_sec;
3646};
3647
3648struct ppc_branch_hash_entry {
3649
3650 /* Base hash table entry structure. */
3651 struct bfd_hash_entry root;
3652
3653 /* Offset within branch lookup table. */
3654 unsigned int offset;
3655
3656 /* Generation marker. */
3657 unsigned int iter;
3658};
3659
3660struct ppc_link_hash_entry
3661{
3662 struct elf_link_hash_entry elf;
3663
3664 union {
3665 /* A pointer to the most recently used stub hash entry against this
3666 symbol. */
3667 struct ppc_stub_hash_entry *stub_cache;
3668
3669 /* A pointer to the next symbol starting with a '.' */
3670 struct ppc_link_hash_entry *next_dot_sym;
3671 } u;
3672
3673 /* Track dynamic relocs copied for this symbol. */
3674 struct ppc_dyn_relocs *dyn_relocs;
3675
3676 /* Link between function code and descriptor symbols. */
3677 struct ppc_link_hash_entry *oh;
3678
3679 /* Flag function code and descriptor symbols. */
3680 unsigned int is_func:1;
3681 unsigned int is_func_descriptor:1;
3682 unsigned int fake:1;
3683
3684 /* Whether global opd/toc sym has been adjusted or not.
3685 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3686 should be set for all globals defined in any opd/toc section. */
3687 unsigned int adjust_done:1;
3688
3689 /* Set if we twiddled this symbol to weak at some stage. */
3690 unsigned int was_undefined:1;
3691
3692 /* Contexts in which symbol is used in the GOT (or TOC).
3693 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3694 corresponding relocs are encountered during check_relocs.
3695 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3696 indicate the corresponding GOT entry type is not needed.
3697 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3698 a TPREL one. We use a separate flag rather than setting TPREL
3699 just for convenience in distinguishing the two cases. */
3700#define TLS_GD 1 /* GD reloc. */
3701#define TLS_LD 2 /* LD reloc. */
3702#define TLS_TPREL 4 /* TPREL reloc, => IE. */
3703#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3704#define TLS_TLS 16 /* Any TLS reloc. */
3705#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3706#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3707#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3708 unsigned char tls_mask;
3709};
3710
3711/* ppc64 ELF linker hash table. */
3712
3713struct ppc_link_hash_table
3714{
3715 struct elf_link_hash_table elf;
3716
3717 /* The stub hash table. */
3718 struct bfd_hash_table stub_hash_table;
3719
3720 /* Another hash table for plt_branch stubs. */
3721 struct bfd_hash_table branch_hash_table;
3722
3723 /* Linker stub bfd. */
3724 bfd *stub_bfd;
3725
3726 /* Linker call-backs. */
3727 asection * (*add_stub_section) (const char *, asection *);
3728 void (*layout_sections_again) (void);
3729
3730 /* Array to keep track of which stub sections have been created, and
3731 information on stub grouping. */
3732 struct map_stub {
3733 /* This is the section to which stubs in the group will be attached. */
3734 asection *link_sec;
3735 /* The stub section. */
3736 asection *stub_sec;
3737 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3738 bfd_vma toc_off;
3739 } *stub_group;
3740
3741 /* Temp used when calculating TOC pointers. */
3742 bfd_vma toc_curr;
3743 bfd *toc_bfd;
3744 asection *toc_first_sec;
3745
3746 /* Highest input section id. */
3747 int top_id;
3748
3749 /* Highest output section index. */
3750 int top_index;
3751
3752 /* Used when adding symbols. */
3753 struct ppc_link_hash_entry *dot_syms;
3754
3755 /* List of input sections for each output section. */
3756 asection **input_list;
3757
3758 /* Short-cuts to get to dynamic linker sections. */
3759 asection *got;
3760 asection *plt;
3761 asection *relplt;
3762 asection *iplt;
3763 asection *reliplt;
3764 asection *dynbss;
3765 asection *relbss;
3766 asection *glink;
3767 asection *sfpr;
3768 asection *brlt;
3769 asection *relbrlt;
3770
3771 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3772 struct ppc_link_hash_entry *tls_get_addr;
3773 struct ppc_link_hash_entry *tls_get_addr_fd;
3774
3775 /* The size of reliplt used by got entry relocs. */
3776 bfd_size_type got_reli_size;
3777
3778 /* Statistics. */
3779 unsigned long stub_count[ppc_stub_plt_call];
3780
3781 /* Number of stubs against global syms. */
3782 unsigned long stub_globals;
3783
3784 /* Set if we should emit symbols for stubs. */
3785 unsigned int emit_stub_syms:1;
3786
3787 /* Set if __tls_get_addr optimization should not be done. */
3788 unsigned int no_tls_get_addr_opt:1;
3789
3790 /* Support for multiple toc sections. */
3791 unsigned int do_multi_toc:1;
3792 unsigned int multi_toc_needed:1;
3793 unsigned int second_toc_pass:1;
3794 unsigned int do_toc_opt:1;
3795
3796 /* Set on error. */
3797 unsigned int stub_error:1;
3798
3799 /* Temp used by ppc64_elf_process_dot_syms. */
3800 unsigned int twiddled_syms:1;
3801
3802 /* Incremented every time we size stubs. */
3803 unsigned int stub_iteration;
3804
3805 /* Small local sym cache. */
3806 struct sym_cache sym_cache;
3807};
3808
3809/* Rename some of the generic section flags to better document how they
3810 are used here. */
3811
3812/* Nonzero if this section has TLS related relocations. */
3813#define has_tls_reloc sec_flg0
3814
3815/* Nonzero if this section has a call to __tls_get_addr. */
3816#define has_tls_get_addr_call sec_flg1
3817
3818/* Nonzero if this section has any toc or got relocs. */
3819#define has_toc_reloc sec_flg2
3820
3821/* Nonzero if this section has a call to another section that uses
3822 the toc or got. */
3823#define makes_toc_func_call sec_flg3
3824
3825/* Recursion protection when determining above flag. */
3826#define call_check_in_progress sec_flg4
3827#define call_check_done sec_flg5
3828
3829/* Get the ppc64 ELF linker hash table from a link_info structure. */
3830
3831#define ppc_hash_table(p) \
3832 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3833 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3834
3835#define ppc_stub_hash_lookup(table, string, create, copy) \
3836 ((struct ppc_stub_hash_entry *) \
3837 bfd_hash_lookup ((table), (string), (create), (copy)))
3838
3839#define ppc_branch_hash_lookup(table, string, create, copy) \
3840 ((struct ppc_branch_hash_entry *) \
3841 bfd_hash_lookup ((table), (string), (create), (copy)))
3842
3843/* Create an entry in the stub hash table. */
3844
3845static struct bfd_hash_entry *
3846stub_hash_newfunc (struct bfd_hash_entry *entry,
3847 struct bfd_hash_table *table,
3848 const char *string)
3849{
3850 /* Allocate the structure if it has not already been allocated by a
3851 subclass. */
3852 if (entry == NULL)
3853 {
3854 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3855 if (entry == NULL)
3856 return entry;
3857 }
3858
3859 /* Call the allocation method of the superclass. */
3860 entry = bfd_hash_newfunc (entry, table, string);
3861 if (entry != NULL)
3862 {
3863 struct ppc_stub_hash_entry *eh;
3864
3865 /* Initialize the local fields. */
3866 eh = (struct ppc_stub_hash_entry *) entry;
3867 eh->stub_type = ppc_stub_none;
3868 eh->stub_sec = NULL;
3869 eh->stub_offset = 0;
3870 eh->target_value = 0;
3871 eh->target_section = NULL;
3872 eh->h = NULL;
3873 eh->id_sec = NULL;
3874 }
3875
3876 return entry;
3877}
3878
3879/* Create an entry in the branch hash table. */
3880
3881static struct bfd_hash_entry *
3882branch_hash_newfunc (struct bfd_hash_entry *entry,
3883 struct bfd_hash_table *table,
3884 const char *string)
3885{
3886 /* Allocate the structure if it has not already been allocated by a
3887 subclass. */
3888 if (entry == NULL)
3889 {
3890 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3891 if (entry == NULL)
3892 return entry;
3893 }
3894
3895 /* Call the allocation method of the superclass. */
3896 entry = bfd_hash_newfunc (entry, table, string);
3897 if (entry != NULL)
3898 {
3899 struct ppc_branch_hash_entry *eh;
3900
3901 /* Initialize the local fields. */
3902 eh = (struct ppc_branch_hash_entry *) entry;
3903 eh->offset = 0;
3904 eh->iter = 0;
3905 }
3906
3907 return entry;
3908}
3909
3910/* Create an entry in a ppc64 ELF linker hash table. */
3911
3912static struct bfd_hash_entry *
3913link_hash_newfunc (struct bfd_hash_entry *entry,
3914 struct bfd_hash_table *table,
3915 const char *string)
3916{
3917 /* Allocate the structure if it has not already been allocated by a
3918 subclass. */
3919 if (entry == NULL)
3920 {
3921 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3922 if (entry == NULL)
3923 return entry;
3924 }
3925
3926 /* Call the allocation method of the superclass. */
3927 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3928 if (entry != NULL)
3929 {
3930 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3931
3932 memset (&eh->u.stub_cache, 0,
3933 (sizeof (struct ppc_link_hash_entry)
3934 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3935
3936 /* When making function calls, old ABI code references function entry
3937 points (dot symbols), while new ABI code references the function
3938 descriptor symbol. We need to make any combination of reference and
3939 definition work together, without breaking archive linking.
3940
3941 For a defined function "foo" and an undefined call to "bar":
3942 An old object defines "foo" and ".foo", references ".bar" (possibly
3943 "bar" too).
3944 A new object defines "foo" and references "bar".
3945
3946 A new object thus has no problem with its undefined symbols being
3947 satisfied by definitions in an old object. On the other hand, the
3948 old object won't have ".bar" satisfied by a new object.
3949
3950 Keep a list of newly added dot-symbols. */
3951
3952 if (string[0] == '.')
3953 {
3954 struct ppc_link_hash_table *htab;
3955
3956 htab = (struct ppc_link_hash_table *) table;
3957 eh->u.next_dot_sym = htab->dot_syms;
3958 htab->dot_syms = eh;
3959 }
3960 }
3961
3962 return entry;
3963}
3964
3965/* Create a ppc64 ELF linker hash table. */
3966
3967static struct bfd_link_hash_table *
3968ppc64_elf_link_hash_table_create (bfd *abfd)
3969{
3970 struct ppc_link_hash_table *htab;
3971 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3972
3973 htab = bfd_zmalloc (amt);
3974 if (htab == NULL)
3975 return NULL;
3976
3977 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3978 sizeof (struct ppc_link_hash_entry),
3979 PPC64_ELF_DATA))
3980 {
3981 free (htab);
3982 return NULL;
3983 }
3984
3985 /* Init the stub hash table too. */
3986 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3987 sizeof (struct ppc_stub_hash_entry)))
3988 return NULL;
3989
3990 /* And the branch hash table. */
3991 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3992 sizeof (struct ppc_branch_hash_entry)))
3993 return NULL;
3994
3995 /* Initializing two fields of the union is just cosmetic. We really
3996 only care about glist, but when compiled on a 32-bit host the
3997 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3998 debugger inspection of these fields look nicer. */
3999 htab->elf.init_got_refcount.refcount = 0;
4000 htab->elf.init_got_refcount.glist = NULL;
4001 htab->elf.init_plt_refcount.refcount = 0;
4002 htab->elf.init_plt_refcount.glist = NULL;
4003 htab->elf.init_got_offset.offset = 0;
4004 htab->elf.init_got_offset.glist = NULL;
4005 htab->elf.init_plt_offset.offset = 0;
4006 htab->elf.init_plt_offset.glist = NULL;
4007
4008 return &htab->elf.root;
4009}
4010
4011/* Free the derived linker hash table. */
4012
4013static void
4014ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4015{
4016 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4017
4018 bfd_hash_table_free (&ret->stub_hash_table);
4019 bfd_hash_table_free (&ret->branch_hash_table);
4020 _bfd_generic_link_hash_table_free (hash);
4021}
4022
4023/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4024
4025void
4026ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4027{
4028 struct ppc_link_hash_table *htab;
4029
4030 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4031
4032/* Always hook our dynamic sections into the first bfd, which is the
4033 linker created stub bfd. This ensures that the GOT header is at
4034 the start of the output TOC section. */
4035 htab = ppc_hash_table (info);
4036 if (htab == NULL)
4037 return;
4038 htab->stub_bfd = abfd;
4039 htab->elf.dynobj = abfd;
4040}
4041
4042/* Build a name for an entry in the stub hash table. */
4043
4044static char *
4045ppc_stub_name (const asection *input_section,
4046 const asection *sym_sec,
4047 const struct ppc_link_hash_entry *h,
4048 const Elf_Internal_Rela *rel)
4049{
4050 char *stub_name;
4051 bfd_size_type len;
4052
4053 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4054 offsets from a sym as a branch target? In fact, we could
4055 probably assume the addend is always zero. */
4056 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4057
4058 if (h)
4059 {
4060 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4061 stub_name = bfd_malloc (len);
4062 if (stub_name == NULL)
4063 return stub_name;
4064
4065 sprintf (stub_name, "%08x.%s+%x",
4066 input_section->id & 0xffffffff,
4067 h->elf.root.root.string,
4068 (int) rel->r_addend & 0xffffffff);
4069 }
4070 else
4071 {
4072 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4073 stub_name = bfd_malloc (len);
4074 if (stub_name == NULL)
4075 return stub_name;
4076
4077 sprintf (stub_name, "%08x.%x:%x+%x",
4078 input_section->id & 0xffffffff,
4079 sym_sec->id & 0xffffffff,
4080 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4081 (int) rel->r_addend & 0xffffffff);
4082 }
4083 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4084 stub_name[len - 2] = 0;
4085 return stub_name;
4086}
4087
4088/* Look up an entry in the stub hash. Stub entries are cached because
4089 creating the stub name takes a bit of time. */
4090
4091static struct ppc_stub_hash_entry *
4092ppc_get_stub_entry (const asection *input_section,
4093 const asection *sym_sec,
4094 struct ppc_link_hash_entry *h,
4095 const Elf_Internal_Rela *rel,
4096 struct ppc_link_hash_table *htab)
4097{
4098 struct ppc_stub_hash_entry *stub_entry;
4099 const asection *id_sec;
4100
4101 /* If this input section is part of a group of sections sharing one
4102 stub section, then use the id of the first section in the group.
4103 Stub names need to include a section id, as there may well be
4104 more than one stub used to reach say, printf, and we need to
4105 distinguish between them. */
4106 id_sec = htab->stub_group[input_section->id].link_sec;
4107
4108 if (h != NULL && h->u.stub_cache != NULL
4109 && h->u.stub_cache->h == h
4110 && h->u.stub_cache->id_sec == id_sec)
4111 {
4112 stub_entry = h->u.stub_cache;
4113 }
4114 else
4115 {
4116 char *stub_name;
4117
4118 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4119 if (stub_name == NULL)
4120 return NULL;
4121
4122 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4123 stub_name, FALSE, FALSE);
4124 if (h != NULL)
4125 h->u.stub_cache = stub_entry;
4126
4127 free (stub_name);
4128 }
4129
4130 return stub_entry;
4131}
4132
4133/* Add a new stub entry to the stub hash. Not all fields of the new
4134 stub entry are initialised. */
4135
4136static struct ppc_stub_hash_entry *
4137ppc_add_stub (const char *stub_name,
4138 asection *section,
4139 struct ppc_link_hash_table *htab)
4140{
4141 asection *link_sec;
4142 asection *stub_sec;
4143 struct ppc_stub_hash_entry *stub_entry;
4144
4145 link_sec = htab->stub_group[section->id].link_sec;
4146 stub_sec = htab->stub_group[section->id].stub_sec;
4147 if (stub_sec == NULL)
4148 {
4149 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4150 if (stub_sec == NULL)
4151 {
4152 size_t namelen;
4153 bfd_size_type len;
4154 char *s_name;
4155
4156 namelen = strlen (link_sec->name);
4157 len = namelen + sizeof (STUB_SUFFIX);
4158 s_name = bfd_alloc (htab->stub_bfd, len);
4159 if (s_name == NULL)
4160 return NULL;
4161
4162 memcpy (s_name, link_sec->name, namelen);
4163 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4164 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4165 if (stub_sec == NULL)
4166 return NULL;
4167 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4168 }
4169 htab->stub_group[section->id].stub_sec = stub_sec;
4170 }
4171
4172 /* Enter this entry into the linker stub hash table. */
4173 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4174 TRUE, FALSE);
4175 if (stub_entry == NULL)
4176 {
4177 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4178 section->owner, stub_name);
4179 return NULL;
4180 }
4181
4182 stub_entry->stub_sec = stub_sec;
4183 stub_entry->stub_offset = 0;
4184 stub_entry->id_sec = link_sec;
4185 return stub_entry;
4186}
4187
4188/* Create sections for linker generated code. */
4189
4190static bfd_boolean
4191create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4192{
4193 struct ppc_link_hash_table *htab;
4194 flagword flags;
4195
4196 htab = ppc_hash_table (info);
4197 if (htab == NULL)
4198 return FALSE;
4199
4200 /* Create .sfpr for code to save and restore fp regs. */
4201 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4202 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4203 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4204 flags);
4205 if (htab->sfpr == NULL
4206 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4207 return FALSE;
4208
4209 /* Create .glink for lazy dynamic linking support. */
4210 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4211 flags);
4212 if (htab->glink == NULL
4213 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4214 return FALSE;
4215
4216 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4217 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4218 if (htab->iplt == NULL
4219 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4220 return FALSE;
4221
4222 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4223 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4224 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4225 ".rela.iplt",
4226 flags);
4227 if (htab->reliplt == NULL
4228 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4229 return FALSE;
4230
4231 /* Create branch lookup table for plt_branch stubs. */
4232 flags = (SEC_ALLOC | SEC_LOAD
4233 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4234 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4235 flags);
4236 if (htab->brlt == NULL
4237 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4238 return FALSE;
4239
4240 if (!info->shared)
4241 return TRUE;
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4244 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4245 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4246 ".rela.branch_lt",
4247 flags);
4248 if (htab->relbrlt == NULL
4249 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4250 return FALSE;
4251
4252 return TRUE;
4253}
4254
4255/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4256 not already done. */
4257
4258static bfd_boolean
4259create_got_section (bfd *abfd, struct bfd_link_info *info)
4260{
4261 asection *got, *relgot;
4262 flagword flags;
4263 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4264
4265 if (!is_ppc64_elf (abfd))
4266 return FALSE;
4267 if (htab == NULL)
4268 return FALSE;
4269
4270 if (!htab->got)
4271 {
4272 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4273 return FALSE;
4274
4275 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4276 if (!htab->got)
4277 abort ();
4278 }
4279
4280 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4281 | SEC_LINKER_CREATED);
4282
4283 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4284 if (!got
4285 || !bfd_set_section_alignment (abfd, got, 3))
4286 return FALSE;
4287
4288 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4289 flags | SEC_READONLY);
4290 if (!relgot
4291 || ! bfd_set_section_alignment (abfd, relgot, 3))
4292 return FALSE;
4293
4294 ppc64_elf_tdata (abfd)->got = got;
4295 ppc64_elf_tdata (abfd)->relgot = relgot;
4296 return TRUE;
4297}
4298
4299/* Create the dynamic sections, and set up shortcuts. */
4300
4301static bfd_boolean
4302ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4303{
4304 struct ppc_link_hash_table *htab;
4305
4306 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4307 return FALSE;
4308
4309 htab = ppc_hash_table (info);
4310 if (htab == NULL)
4311 return FALSE;
4312
4313 if (!htab->got)
4314 htab->got = bfd_get_section_by_name (dynobj, ".got");
4315 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4316 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4317 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4318 if (!info->shared)
4319 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4320
4321 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4322 || (!info->shared && !htab->relbss))
4323 abort ();
4324
4325 return TRUE;
4326}
4327
4328/* Follow indirect and warning symbol links. */
4329
4330static inline struct bfd_link_hash_entry *
4331follow_link (struct bfd_link_hash_entry *h)
4332{
4333 while (h->type == bfd_link_hash_indirect
4334 || h->type == bfd_link_hash_warning)
4335 h = h->u.i.link;
4336 return h;
4337}
4338
4339static inline struct elf_link_hash_entry *
4340elf_follow_link (struct elf_link_hash_entry *h)
4341{
4342 return (struct elf_link_hash_entry *) follow_link (&h->root);
4343}
4344
4345static inline struct ppc_link_hash_entry *
4346ppc_follow_link (struct ppc_link_hash_entry *h)
4347{
4348 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4349}
4350
4351/* Merge PLT info on FROM with that on TO. */
4352
4353static void
4354move_plt_plist (struct ppc_link_hash_entry *from,
4355 struct ppc_link_hash_entry *to)
4356{
4357 if (from->elf.plt.plist != NULL)
4358 {
4359 if (to->elf.plt.plist != NULL)
4360 {
4361 struct plt_entry **entp;
4362 struct plt_entry *ent;
4363
4364 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4365 {
4366 struct plt_entry *dent;
4367
4368 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4369 if (dent->addend == ent->addend)
4370 {
4371 dent->plt.refcount += ent->plt.refcount;
4372 *entp = ent->next;
4373 break;
4374 }
4375 if (dent == NULL)
4376 entp = &ent->next;
4377 }
4378 *entp = to->elf.plt.plist;
4379 }
4380
4381 to->elf.plt.plist = from->elf.plt.plist;
4382 from->elf.plt.plist = NULL;
4383 }
4384}
4385
4386/* Copy the extra info we tack onto an elf_link_hash_entry. */
4387
4388static void
4389ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4390 struct elf_link_hash_entry *dir,
4391 struct elf_link_hash_entry *ind)
4392{
4393 struct ppc_link_hash_entry *edir, *eind;
4394
4395 edir = (struct ppc_link_hash_entry *) dir;
4396 eind = (struct ppc_link_hash_entry *) ind;
4397
4398 /* Copy over any dynamic relocs we may have on the indirect sym. */
4399 if (eind->dyn_relocs != NULL)
4400 {
4401 if (edir->dyn_relocs != NULL)
4402 {
4403 struct ppc_dyn_relocs **pp;
4404 struct ppc_dyn_relocs *p;
4405
4406 /* Add reloc counts against the indirect sym to the direct sym
4407 list. Merge any entries against the same section. */
4408 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4409 {
4410 struct ppc_dyn_relocs *q;
4411
4412 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4413 if (q->sec == p->sec)
4414 {
4415 q->pc_count += p->pc_count;
4416 q->count += p->count;
4417 *pp = p->next;
4418 break;
4419 }
4420 if (q == NULL)
4421 pp = &p->next;
4422 }
4423 *pp = edir->dyn_relocs;
4424 }
4425
4426 edir->dyn_relocs = eind->dyn_relocs;
4427 eind->dyn_relocs = NULL;
4428 }
4429
4430 edir->is_func |= eind->is_func;
4431 edir->is_func_descriptor |= eind->is_func_descriptor;
4432 edir->tls_mask |= eind->tls_mask;
4433 if (eind->oh != NULL)
4434 edir->oh = ppc_follow_link (eind->oh);
4435
4436 /* If called to transfer flags for a weakdef during processing
4437 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4438 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4439 if (!(ELIMINATE_COPY_RELOCS
4440 && eind->elf.root.type != bfd_link_hash_indirect
4441 && edir->elf.dynamic_adjusted))
4442 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4443
4444 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4445 edir->elf.ref_regular |= eind->elf.ref_regular;
4446 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4447 edir->elf.needs_plt |= eind->elf.needs_plt;
4448
4449 /* If we were called to copy over info for a weak sym, that's all. */
4450 if (eind->elf.root.type != bfd_link_hash_indirect)
4451 return;
4452
4453 /* Copy over got entries that we may have already seen to the
4454 symbol which just became indirect. */
4455 if (eind->elf.got.glist != NULL)
4456 {
4457 if (edir->elf.got.glist != NULL)
4458 {
4459 struct got_entry **entp;
4460 struct got_entry *ent;
4461
4462 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4463 {
4464 struct got_entry *dent;
4465
4466 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4467 if (dent->addend == ent->addend
4468 && dent->owner == ent->owner
4469 && dent->tls_type == ent->tls_type)
4470 {
4471 dent->got.refcount += ent->got.refcount;
4472 *entp = ent->next;
4473 break;
4474 }
4475 if (dent == NULL)
4476 entp = &ent->next;
4477 }
4478 *entp = edir->elf.got.glist;
4479 }
4480
4481 edir->elf.got.glist = eind->elf.got.glist;
4482 eind->elf.got.glist = NULL;
4483 }
4484
4485 /* And plt entries. */
4486 move_plt_plist (eind, edir);
4487
4488 if (eind->elf.dynindx != -1)
4489 {
4490 if (edir->elf.dynindx != -1)
4491 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4492 edir->elf.dynstr_index);
4493 edir->elf.dynindx = eind->elf.dynindx;
4494 edir->elf.dynstr_index = eind->elf.dynstr_index;
4495 eind->elf.dynindx = -1;
4496 eind->elf.dynstr_index = 0;
4497 }
4498}
4499
4500/* Find the function descriptor hash entry from the given function code
4501 hash entry FH. Link the entries via their OH fields. */
4502
4503static struct ppc_link_hash_entry *
4504lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4505{
4506 struct ppc_link_hash_entry *fdh = fh->oh;
4507
4508 if (fdh == NULL)
4509 {
4510 const char *fd_name = fh->elf.root.root.string + 1;
4511
4512 fdh = (struct ppc_link_hash_entry *)
4513 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4514 if (fdh == NULL)
4515 return fdh;
4516
4517 fdh->is_func_descriptor = 1;
4518 fdh->oh = fh;
4519 fh->is_func = 1;
4520 fh->oh = fdh;
4521 }
4522
4523 return ppc_follow_link (fdh);
4524}
4525
4526/* Make a fake function descriptor sym for the code sym FH. */
4527
4528static struct ppc_link_hash_entry *
4529make_fdh (struct bfd_link_info *info,
4530 struct ppc_link_hash_entry *fh)
4531{
4532 bfd *abfd;
4533 asymbol *newsym;
4534 struct bfd_link_hash_entry *bh;
4535 struct ppc_link_hash_entry *fdh;
4536
4537 abfd = fh->elf.root.u.undef.abfd;
4538 newsym = bfd_make_empty_symbol (abfd);
4539 newsym->name = fh->elf.root.root.string + 1;
4540 newsym->section = bfd_und_section_ptr;
4541 newsym->value = 0;
4542 newsym->flags = BSF_WEAK;
4543
4544 bh = NULL;
4545 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4546 newsym->flags, newsym->section,
4547 newsym->value, NULL, FALSE, FALSE,
4548 &bh))
4549 return NULL;
4550
4551 fdh = (struct ppc_link_hash_entry *) bh;
4552 fdh->elf.non_elf = 0;
4553 fdh->fake = 1;
4554 fdh->is_func_descriptor = 1;
4555 fdh->oh = fh;
4556 fh->is_func = 1;
4557 fh->oh = fdh;
4558 return fdh;
4559}
4560
4561/* Fix function descriptor symbols defined in .opd sections to be
4562 function type. */
4563
4564static bfd_boolean
4565ppc64_elf_add_symbol_hook (bfd *ibfd,
4566 struct bfd_link_info *info,
4567 Elf_Internal_Sym *isym,
4568 const char **name ATTRIBUTE_UNUSED,
4569 flagword *flags ATTRIBUTE_UNUSED,
4570 asection **sec,
4571 bfd_vma *value ATTRIBUTE_UNUSED)
4572{
4573 if ((ibfd->flags & DYNAMIC) == 0
4574 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4575 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4576
4577 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4578 {
4579 if ((ibfd->flags & DYNAMIC) == 0)
4580 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4581 }
4582 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4583 ;
4584 else if (*sec != NULL
4585 && strcmp ((*sec)->name, ".opd") == 0)
4586 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4587
4588 return TRUE;
4589}
4590
4591/* This function makes an old ABI object reference to ".bar" cause the
4592 inclusion of a new ABI object archive that defines "bar".
4593 NAME is a symbol defined in an archive. Return a symbol in the hash
4594 table that might be satisfied by the archive symbols. */
4595
4596static struct elf_link_hash_entry *
4597ppc64_elf_archive_symbol_lookup (bfd *abfd,
4598 struct bfd_link_info *info,
4599 const char *name)
4600{
4601 struct elf_link_hash_entry *h;
4602 char *dot_name;
4603 size_t len;
4604
4605 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4606 if (h != NULL
4607 /* Don't return this sym if it is a fake function descriptor
4608 created by add_symbol_adjust. */
4609 && !(h->root.type == bfd_link_hash_undefweak
4610 && ((struct ppc_link_hash_entry *) h)->fake))
4611 return h;
4612
4613 if (name[0] == '.')
4614 return h;
4615
4616 len = strlen (name);
4617 dot_name = bfd_alloc (abfd, len + 2);
4618 if (dot_name == NULL)
4619 return (struct elf_link_hash_entry *) 0 - 1;
4620 dot_name[0] = '.';
4621 memcpy (dot_name + 1, name, len + 1);
4622 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4623 bfd_release (abfd, dot_name);
4624 return h;
4625}
4626
4627/* This function satisfies all old ABI object references to ".bar" if a
4628 new ABI object defines "bar". Well, at least, undefined dot symbols
4629 are made weak. This stops later archive searches from including an
4630 object if we already have a function descriptor definition. It also
4631 prevents the linker complaining about undefined symbols.
4632 We also check and correct mismatched symbol visibility here. The
4633 most restrictive visibility of the function descriptor and the
4634 function entry symbol is used. */
4635
4636static bfd_boolean
4637add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4638{
4639 struct ppc_link_hash_table *htab;
4640 struct ppc_link_hash_entry *fdh;
4641
4642 if (eh->elf.root.type == bfd_link_hash_indirect)
4643 return TRUE;
4644
4645 if (eh->elf.root.type == bfd_link_hash_warning)
4646 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4647
4648 if (eh->elf.root.root.string[0] != '.')
4649 abort ();
4650
4651 htab = ppc_hash_table (info);
4652 if (htab == NULL)
4653 return FALSE;
4654
4655 fdh = lookup_fdh (eh, htab);
4656 if (fdh == NULL)
4657 {
4658 if (!info->relocatable
4659 && (eh->elf.root.type == bfd_link_hash_undefined
4660 || eh->elf.root.type == bfd_link_hash_undefweak)
4661 && eh->elf.ref_regular)
4662 {
4663 /* Make an undefweak function descriptor sym, which is enough to
4664 pull in an --as-needed shared lib, but won't cause link
4665 errors. Archives are handled elsewhere. */
4666 fdh = make_fdh (info, eh);
4667 if (fdh == NULL)
4668 return FALSE;
4669 fdh->elf.ref_regular = 1;
4670 }
4671 }
4672 else
4673 {
4674 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4675 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4676 if (entry_vis < descr_vis)
4677 fdh->elf.other += entry_vis - descr_vis;
4678 else if (entry_vis > descr_vis)
4679 eh->elf.other += descr_vis - entry_vis;
4680
4681 if ((fdh->elf.root.type == bfd_link_hash_defined
4682 || fdh->elf.root.type == bfd_link_hash_defweak)
4683 && eh->elf.root.type == bfd_link_hash_undefined)
4684 {
4685 eh->elf.root.type = bfd_link_hash_undefweak;
4686 eh->was_undefined = 1;
4687 htab->twiddled_syms = 1;
4688 }
4689 }
4690
4691 return TRUE;
4692}
4693
4694/* Process list of dot-symbols we made in link_hash_newfunc. */
4695
4696static bfd_boolean
4697ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4698{
4699 struct ppc_link_hash_table *htab;
4700 struct ppc_link_hash_entry **p, *eh;
4701
4702 if (!is_ppc64_elf (info->output_bfd))
4703 return TRUE;
4704 htab = ppc_hash_table (info);
4705 if (htab == NULL)
4706 return FALSE;
4707
4708 if (is_ppc64_elf (ibfd))
4709 {
4710 p = &htab->dot_syms;
4711 while ((eh = *p) != NULL)
4712 {
4713 *p = NULL;
4714 if (!add_symbol_adjust (eh, info))
4715 return FALSE;
4716 p = &eh->u.next_dot_sym;
4717 }
4718 }
4719
4720 /* Clear the list for non-ppc64 input files. */
4721 p = &htab->dot_syms;
4722 while ((eh = *p) != NULL)
4723 {
4724 *p = NULL;
4725 p = &eh->u.next_dot_sym;
4726 }
4727
4728 /* We need to fix the undefs list for any syms we have twiddled to
4729 undef_weak. */
4730 if (htab->twiddled_syms)
4731 {
4732 bfd_link_repair_undef_list (&htab->elf.root);
4733 htab->twiddled_syms = 0;
4734 }
4735 return TRUE;
4736}
4737
4738/* Undo hash table changes when an --as-needed input file is determined
4739 not to be needed. */
4740
4741static bfd_boolean
4742ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4743 struct bfd_link_info *info)
4744{
4745 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4746
4747 if (htab == NULL)
4748 return FALSE;
4749
4750 htab->dot_syms = NULL;
4751 return TRUE;
4752}
4753
4754/* If --just-symbols against a final linked binary, then assume we need
4755 toc adjusting stubs when calling functions defined there. */
4756
4757static void
4758ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4759{
4760 if ((sec->flags & SEC_CODE) != 0
4761 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4762 && is_ppc64_elf (sec->owner))
4763 {
4764 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4765 if (got != NULL
4766 && got->size >= elf_backend_got_header_size
4767 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4768 sec->has_toc_reloc = 1;
4769 }
4770 _bfd_elf_link_just_syms (sec, info);
4771}
4772
4773static struct plt_entry **
4774update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4775 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4776{
4777 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4778 struct plt_entry **local_plt;
4779 unsigned char *local_got_tls_masks;
4780
4781 if (local_got_ents == NULL)
4782 {
4783 bfd_size_type size = symtab_hdr->sh_info;
4784
4785 size *= (sizeof (*local_got_ents)
4786 + sizeof (*local_plt)
4787 + sizeof (*local_got_tls_masks));
4788 local_got_ents = bfd_zalloc (abfd, size);
4789 if (local_got_ents == NULL)
4790 return NULL;
4791 elf_local_got_ents (abfd) = local_got_ents;
4792 }
4793
4794 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4795 {
4796 struct got_entry *ent;
4797
4798 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4799 if (ent->addend == r_addend
4800 && ent->owner == abfd
4801 && ent->tls_type == tls_type)
4802 break;
4803 if (ent == NULL)
4804 {
4805 bfd_size_type amt = sizeof (*ent);
4806 ent = bfd_alloc (abfd, amt);
4807 if (ent == NULL)
4808 return FALSE;
4809 ent->next = local_got_ents[r_symndx];
4810 ent->addend = r_addend;
4811 ent->owner = abfd;
4812 ent->tls_type = tls_type;
4813 ent->is_indirect = FALSE;
4814 ent->got.refcount = 0;
4815 local_got_ents[r_symndx] = ent;
4816 }
4817 ent->got.refcount += 1;
4818 }
4819
4820 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4821 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4822 local_got_tls_masks[r_symndx] |= tls_type;
4823
4824 return local_plt + r_symndx;
4825}
4826
4827static bfd_boolean
4828update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4829{
4830 struct plt_entry *ent;
4831
4832 for (ent = *plist; ent != NULL; ent = ent->next)
4833 if (ent->addend == addend)
4834 break;
4835 if (ent == NULL)
4836 {
4837 bfd_size_type amt = sizeof (*ent);
4838 ent = bfd_alloc (abfd, amt);
4839 if (ent == NULL)
4840 return FALSE;
4841 ent->next = *plist;
4842 ent->addend = addend;
4843 ent->plt.refcount = 0;
4844 *plist = ent;
4845 }
4846 ent->plt.refcount += 1;
4847 return TRUE;
4848}
4849
4850static bfd_boolean
4851is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4852{
4853 return (r_type == R_PPC64_REL24
4854 || r_type == R_PPC64_REL14
4855 || r_type == R_PPC64_REL14_BRTAKEN
4856 || r_type == R_PPC64_REL14_BRNTAKEN
4857 || r_type == R_PPC64_ADDR24
4858 || r_type == R_PPC64_ADDR14
4859 || r_type == R_PPC64_ADDR14_BRTAKEN
4860 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4861}
4862
4863/* Look through the relocs for a section during the first phase, and
4864 calculate needed space in the global offset table, procedure
4865 linkage table, and dynamic reloc sections. */
4866
4867static bfd_boolean
4868ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4869 asection *sec, const Elf_Internal_Rela *relocs)
4870{
4871 struct ppc_link_hash_table *htab;
4872 Elf_Internal_Shdr *symtab_hdr;
4873 struct elf_link_hash_entry **sym_hashes;
4874 const Elf_Internal_Rela *rel;
4875 const Elf_Internal_Rela *rel_end;
4876 asection *sreloc;
4877 asection **opd_sym_map;
4878 struct elf_link_hash_entry *tga, *dottga;
4879
4880 if (info->relocatable)
4881 return TRUE;
4882
4883 /* Don't do anything special with non-loaded, non-alloced sections.
4884 In particular, any relocs in such sections should not affect GOT
4885 and PLT reference counting (ie. we don't allow them to create GOT
4886 or PLT entries), there's no possibility or desire to optimize TLS
4887 relocs, and there's not much point in propagating relocs to shared
4888 libs that the dynamic linker won't relocate. */
4889 if ((sec->flags & SEC_ALLOC) == 0)
4890 return TRUE;
4891
4892 BFD_ASSERT (is_ppc64_elf (abfd));
4893
4894 htab = ppc_hash_table (info);
4895 if (htab == NULL)
4896 return FALSE;
4897
4898 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4899 FALSE, FALSE, TRUE);
4900 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4901 FALSE, FALSE, TRUE);
4902 symtab_hdr = &elf_symtab_hdr (abfd);
4903 sym_hashes = elf_sym_hashes (abfd);
4904 sreloc = NULL;
4905 opd_sym_map = NULL;
4906 if (strcmp (sec->name, ".opd") == 0)
4907 {
4908 /* Garbage collection needs some extra help with .opd sections.
4909 We don't want to necessarily keep everything referenced by
4910 relocs in .opd, as that would keep all functions. Instead,
4911 if we reference an .opd symbol (a function descriptor), we
4912 want to keep the function code symbol's section. This is
4913 easy for global symbols, but for local syms we need to keep
4914 information about the associated function section. */
4915 bfd_size_type amt;
4916
4917 amt = sec->size * sizeof (*opd_sym_map) / 8;
4918 opd_sym_map = bfd_zalloc (abfd, amt);
4919 if (opd_sym_map == NULL)
4920 return FALSE;
4921 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4922 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4923 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4924 }
4925
4926 if (htab->sfpr == NULL
4927 && !create_linkage_sections (htab->elf.dynobj, info))
4928 return FALSE;
4929
4930 rel_end = relocs + sec->reloc_count;
4931 for (rel = relocs; rel < rel_end; rel++)
4932 {
4933 unsigned long r_symndx;
4934 struct elf_link_hash_entry *h;
4935 enum elf_ppc64_reloc_type r_type;
4936 int tls_type;
4937 struct _ppc64_elf_section_data *ppc64_sec;
4938 struct plt_entry **ifunc;
4939
4940 r_symndx = ELF64_R_SYM (rel->r_info);
4941 if (r_symndx < symtab_hdr->sh_info)
4942 h = NULL;
4943 else
4944 {
4945 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4946 h = elf_follow_link (h);
4947 }
4948
4949 tls_type = 0;
4950 ifunc = NULL;
4951 if (h != NULL)
4952 {
4953 if (h->type == STT_GNU_IFUNC)
4954 {
4955 h->needs_plt = 1;
4956 ifunc = &h->plt.plist;
4957 }
4958 }
4959 else
4960 {
4961 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4962 abfd, r_symndx);
4963 if (isym == NULL)
4964 return FALSE;
4965
4966 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4967 {
4968 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4969 rel->r_addend, PLT_IFUNC);
4970 if (ifunc == NULL)
4971 return FALSE;
4972 }
4973 }
4974 r_type = ELF64_R_TYPE (rel->r_info);
4975 if (is_branch_reloc (r_type))
4976 {
4977 if (h != NULL && (h == tga || h == dottga))
4978 {
4979 if (rel != relocs
4980 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4981 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4982 /* We have a new-style __tls_get_addr call with a marker
4983 reloc. */
4984 ;
4985 else
4986 /* Mark this section as having an old-style call. */
4987 sec->has_tls_get_addr_call = 1;
4988 }
4989
4990 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4991 if (ifunc != NULL
4992 && !update_plt_info (abfd, ifunc, rel->r_addend))
4993 return FALSE;
4994 }
4995
4996 switch (r_type)
4997 {
4998 case R_PPC64_TLSGD:
4999 case R_PPC64_TLSLD:
5000 /* These special tls relocs tie a call to __tls_get_addr with
5001 its parameter symbol. */
5002 break;
5003
5004 case R_PPC64_GOT_TLSLD16:
5005 case R_PPC64_GOT_TLSLD16_LO:
5006 case R_PPC64_GOT_TLSLD16_HI:
5007 case R_PPC64_GOT_TLSLD16_HA:
5008 tls_type = TLS_TLS | TLS_LD;
5009 goto dogottls;
5010
5011 case R_PPC64_GOT_TLSGD16:
5012 case R_PPC64_GOT_TLSGD16_LO:
5013 case R_PPC64_GOT_TLSGD16_HI:
5014 case R_PPC64_GOT_TLSGD16_HA:
5015 tls_type = TLS_TLS | TLS_GD;
5016 goto dogottls;
5017
5018 case R_PPC64_GOT_TPREL16_DS:
5019 case R_PPC64_GOT_TPREL16_LO_DS:
5020 case R_PPC64_GOT_TPREL16_HI:
5021 case R_PPC64_GOT_TPREL16_HA:
5022 if (!info->executable)
5023 info->flags |= DF_STATIC_TLS;
5024 tls_type = TLS_TLS | TLS_TPREL;
5025 goto dogottls;
5026
5027 case R_PPC64_GOT_DTPREL16_DS:
5028 case R_PPC64_GOT_DTPREL16_LO_DS:
5029 case R_PPC64_GOT_DTPREL16_HI:
5030 case R_PPC64_GOT_DTPREL16_HA:
5031 tls_type = TLS_TLS | TLS_DTPREL;
5032 dogottls:
5033 sec->has_tls_reloc = 1;
5034 /* Fall thru */
5035
5036 case R_PPC64_GOT16:
5037 case R_PPC64_GOT16_DS:
5038 case R_PPC64_GOT16_HA:
5039 case R_PPC64_GOT16_HI:
5040 case R_PPC64_GOT16_LO:
5041 case R_PPC64_GOT16_LO_DS:
5042 /* This symbol requires a global offset table entry. */
5043 sec->has_toc_reloc = 1;
5044 if (r_type == R_PPC64_GOT_TLSLD16
5045 || r_type == R_PPC64_GOT_TLSGD16
5046 || r_type == R_PPC64_GOT_TPREL16_DS
5047 || r_type == R_PPC64_GOT_DTPREL16_DS
5048 || r_type == R_PPC64_GOT16
5049 || r_type == R_PPC64_GOT16_DS)
5050 {
5051 htab->do_multi_toc = 1;
5052 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5053 }
5054
5055 if (ppc64_elf_tdata (abfd)->got == NULL
5056 && !create_got_section (abfd, info))
5057 return FALSE;
5058
5059 if (h != NULL)
5060 {
5061 struct ppc_link_hash_entry *eh;
5062 struct got_entry *ent;
5063
5064 eh = (struct ppc_link_hash_entry *) h;
5065 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5066 if (ent->addend == rel->r_addend
5067 && ent->owner == abfd
5068 && ent->tls_type == tls_type)
5069 break;
5070 if (ent == NULL)
5071 {
5072 bfd_size_type amt = sizeof (*ent);
5073 ent = bfd_alloc (abfd, amt);
5074 if (ent == NULL)
5075 return FALSE;
5076 ent->next = eh->elf.got.glist;
5077 ent->addend = rel->r_addend;
5078 ent->owner = abfd;
5079 ent->tls_type = tls_type;
5080 ent->is_indirect = FALSE;
5081 ent->got.refcount = 0;
5082 eh->elf.got.glist = ent;
5083 }
5084 ent->got.refcount += 1;
5085 eh->tls_mask |= tls_type;
5086 }
5087 else
5088 /* This is a global offset table entry for a local symbol. */
5089 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5090 rel->r_addend, tls_type))
5091 return FALSE;
5092 break;
5093
5094 case R_PPC64_PLT16_HA:
5095 case R_PPC64_PLT16_HI:
5096 case R_PPC64_PLT16_LO:
5097 case R_PPC64_PLT32:
5098 case R_PPC64_PLT64:
5099 /* This symbol requires a procedure linkage table entry. We
5100 actually build the entry in adjust_dynamic_symbol,
5101 because this might be a case of linking PIC code without
5102 linking in any dynamic objects, in which case we don't
5103 need to generate a procedure linkage table after all. */
5104 if (h == NULL)
5105 {
5106 /* It does not make sense to have a procedure linkage
5107 table entry for a local symbol. */
5108 bfd_set_error (bfd_error_bad_value);
5109 return FALSE;
5110 }
5111 else
5112 {
5113 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5114 return FALSE;
5115 h->needs_plt = 1;
5116 if (h->root.root.string[0] == '.'
5117 && h->root.root.string[1] != '\0')
5118 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5119 }
5120 break;
5121
5122 /* The following relocations don't need to propagate the
5123 relocation if linking a shared object since they are
5124 section relative. */
5125 case R_PPC64_SECTOFF:
5126 case R_PPC64_SECTOFF_LO:
5127 case R_PPC64_SECTOFF_HI:
5128 case R_PPC64_SECTOFF_HA:
5129 case R_PPC64_SECTOFF_DS:
5130 case R_PPC64_SECTOFF_LO_DS:
5131 case R_PPC64_DTPREL16:
5132 case R_PPC64_DTPREL16_LO:
5133 case R_PPC64_DTPREL16_HI:
5134 case R_PPC64_DTPREL16_HA:
5135 case R_PPC64_DTPREL16_DS:
5136 case R_PPC64_DTPREL16_LO_DS:
5137 case R_PPC64_DTPREL16_HIGHER:
5138 case R_PPC64_DTPREL16_HIGHERA:
5139 case R_PPC64_DTPREL16_HIGHEST:
5140 case R_PPC64_DTPREL16_HIGHESTA:
5141 break;
5142
5143 /* Nor do these. */
5144 case R_PPC64_REL16:
5145 case R_PPC64_REL16_LO:
5146 case R_PPC64_REL16_HI:
5147 case R_PPC64_REL16_HA:
5148 break;
5149
5150 case R_PPC64_TOC16:
5151 case R_PPC64_TOC16_DS:
5152 htab->do_multi_toc = 1;
5153 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5154 case R_PPC64_TOC16_LO:
5155 case R_PPC64_TOC16_HI:
5156 case R_PPC64_TOC16_HA:
5157 case R_PPC64_TOC16_LO_DS:
5158 sec->has_toc_reloc = 1;
5159 break;
5160
5161 /* This relocation describes the C++ object vtable hierarchy.
5162 Reconstruct it for later use during GC. */
5163 case R_PPC64_GNU_VTINHERIT:
5164 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5165 return FALSE;
5166 break;
5167
5168 /* This relocation describes which C++ vtable entries are actually
5169 used. Record for later use during GC. */
5170 case R_PPC64_GNU_VTENTRY:
5171 BFD_ASSERT (h != NULL);
5172 if (h != NULL
5173 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5174 return FALSE;
5175 break;
5176
5177 case R_PPC64_REL14:
5178 case R_PPC64_REL14_BRTAKEN:
5179 case R_PPC64_REL14_BRNTAKEN:
5180 {
5181 asection *dest = NULL;
5182
5183 /* Heuristic: If jumping outside our section, chances are
5184 we are going to need a stub. */
5185 if (h != NULL)
5186 {
5187 /* If the sym is weak it may be overridden later, so
5188 don't assume we know where a weak sym lives. */
5189 if (h->root.type == bfd_link_hash_defined)
5190 dest = h->root.u.def.section;
5191 }
5192 else
5193 {
5194 Elf_Internal_Sym *isym;
5195
5196 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5197 abfd, r_symndx);
5198 if (isym == NULL)
5199 return FALSE;
5200
5201 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5202 }
5203
5204 if (dest != sec)
5205 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5206 }
5207 /* Fall through. */
5208
5209 case R_PPC64_REL24:
5210 if (h != NULL && ifunc == NULL)
5211 {
5212 /* We may need a .plt entry if the function this reloc
5213 refers to is in a shared lib. */
5214 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5215 return FALSE;
5216 h->needs_plt = 1;
5217 if (h->root.root.string[0] == '.'
5218 && h->root.root.string[1] != '\0')
5219 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5220 if (h == tga || h == dottga)
5221 sec->has_tls_reloc = 1;
5222 }
5223 break;
5224
5225 case R_PPC64_TPREL64:
5226 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5227 if (!info->executable)
5228 info->flags |= DF_STATIC_TLS;
5229 goto dotlstoc;
5230
5231 case R_PPC64_DTPMOD64:
5232 if (rel + 1 < rel_end
5233 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5234 && rel[1].r_offset == rel->r_offset + 8)
5235 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5236 else
5237 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5238 goto dotlstoc;
5239
5240 case R_PPC64_DTPREL64:
5241 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5242 if (rel != relocs
5243 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5244 && rel[-1].r_offset == rel->r_offset - 8)
5245 /* This is the second reloc of a dtpmod, dtprel pair.
5246 Don't mark with TLS_DTPREL. */
5247 goto dodyn;
5248
5249 dotlstoc:
5250 sec->has_tls_reloc = 1;
5251 if (h != NULL)
5252 {
5253 struct ppc_link_hash_entry *eh;
5254 eh = (struct ppc_link_hash_entry *) h;
5255 eh->tls_mask |= tls_type;
5256 }
5257 else
5258 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5259 rel->r_addend, tls_type))
5260 return FALSE;
5261
5262 ppc64_sec = ppc64_elf_section_data (sec);
5263 if (ppc64_sec->sec_type != sec_toc)
5264 {
5265 bfd_size_type amt;
5266
5267 /* One extra to simplify get_tls_mask. */
5268 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5269 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5270 if (ppc64_sec->u.toc.symndx == NULL)
5271 return FALSE;
5272 amt = sec->size * sizeof (bfd_vma) / 8;
5273 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5274 if (ppc64_sec->u.toc.add == NULL)
5275 return FALSE;
5276 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5277 ppc64_sec->sec_type = sec_toc;
5278 }
5279 BFD_ASSERT (rel->r_offset % 8 == 0);
5280 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5281 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5282
5283 /* Mark the second slot of a GD or LD entry.
5284 -1 to indicate GD and -2 to indicate LD. */
5285 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5286 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5287 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5288 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5289 goto dodyn;
5290
5291 case R_PPC64_TPREL16:
5292 case R_PPC64_TPREL16_LO:
5293 case R_PPC64_TPREL16_HI:
5294 case R_PPC64_TPREL16_HA:
5295 case R_PPC64_TPREL16_DS:
5296 case R_PPC64_TPREL16_LO_DS:
5297 case R_PPC64_TPREL16_HIGHER:
5298 case R_PPC64_TPREL16_HIGHERA:
5299 case R_PPC64_TPREL16_HIGHEST:
5300 case R_PPC64_TPREL16_HIGHESTA:
5301 if (info->shared)
5302 {
5303 if (!info->executable)
5304 info->flags |= DF_STATIC_TLS;
5305 goto dodyn;
5306 }
5307 break;
5308
5309 case R_PPC64_ADDR64:
5310 if (opd_sym_map != NULL
5311 && rel + 1 < rel_end
5312 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5313 {
5314 if (h != NULL)
5315 {
5316 if (h->root.root.string[0] == '.'
5317 && h->root.root.string[1] != 0
5318 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5319 ;
5320 else
5321 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5322 }
5323 else
5324 {
5325 asection *s;
5326 Elf_Internal_Sym *isym;
5327
5328 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5329 abfd, r_symndx);
5330 if (isym == NULL)
5331 return FALSE;
5332
5333 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5334 if (s != NULL && s != sec)
5335 opd_sym_map[rel->r_offset / 8] = s;
5336 }
5337 }
5338 /* Fall through. */
5339
5340 case R_PPC64_REL30:
5341 case R_PPC64_REL32:
5342 case R_PPC64_REL64:
5343 case R_PPC64_ADDR14:
5344 case R_PPC64_ADDR14_BRNTAKEN:
5345 case R_PPC64_ADDR14_BRTAKEN:
5346 case R_PPC64_ADDR16:
5347 case R_PPC64_ADDR16_DS:
5348 case R_PPC64_ADDR16_HA:
5349 case R_PPC64_ADDR16_HI:
5350 case R_PPC64_ADDR16_HIGHER:
5351 case R_PPC64_ADDR16_HIGHERA:
5352 case R_PPC64_ADDR16_HIGHEST:
5353 case R_PPC64_ADDR16_HIGHESTA:
5354 case R_PPC64_ADDR16_LO:
5355 case R_PPC64_ADDR16_LO_DS:
5356 case R_PPC64_ADDR24:
5357 case R_PPC64_ADDR32:
5358 case R_PPC64_UADDR16:
5359 case R_PPC64_UADDR32:
5360 case R_PPC64_UADDR64:
5361 case R_PPC64_TOC:
5362 if (h != NULL && !info->shared)
5363 /* We may need a copy reloc. */
5364 h->non_got_ref = 1;
5365
5366 /* Don't propagate .opd relocs. */
5367 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5368 break;
5369
5370 /* If we are creating a shared library, and this is a reloc
5371 against a global symbol, or a non PC relative reloc
5372 against a local symbol, then we need to copy the reloc
5373 into the shared library. However, if we are linking with
5374 -Bsymbolic, we do not need to copy a reloc against a
5375 global symbol which is defined in an object we are
5376 including in the link (i.e., DEF_REGULAR is set). At
5377 this point we have not seen all the input files, so it is
5378 possible that DEF_REGULAR is not set now but will be set
5379 later (it is never cleared). In case of a weak definition,
5380 DEF_REGULAR may be cleared later by a strong definition in
5381 a shared library. We account for that possibility below by
5382 storing information in the dyn_relocs field of the hash
5383 table entry. A similar situation occurs when creating
5384 shared libraries and symbol visibility changes render the
5385 symbol local.
5386
5387 If on the other hand, we are creating an executable, we
5388 may need to keep relocations for symbols satisfied by a
5389 dynamic library if we manage to avoid copy relocs for the
5390 symbol. */
5391 dodyn:
5392 if ((info->shared
5393 && (must_be_dyn_reloc (info, r_type)
5394 || (h != NULL
5395 && (! info->symbolic
5396 || h->root.type == bfd_link_hash_defweak
5397 || !h->def_regular))))
5398 || (ELIMINATE_COPY_RELOCS
5399 && !info->shared
5400 && h != NULL
5401 && (h->root.type == bfd_link_hash_defweak
5402 || !h->def_regular))
5403 || (!info->shared
5404 && ifunc != NULL))
5405 {
5406 struct ppc_dyn_relocs *p;
5407 struct ppc_dyn_relocs **head;
5408
5409 /* We must copy these reloc types into the output file.
5410 Create a reloc section in dynobj and make room for
5411 this reloc. */
5412 if (sreloc == NULL)
5413 {
5414 sreloc = _bfd_elf_make_dynamic_reloc_section
5415 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5416
5417 if (sreloc == NULL)
5418 return FALSE;
5419 }
5420
5421 /* If this is a global symbol, we count the number of
5422 relocations we need for this symbol. */
5423 if (h != NULL)
5424 {
5425 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5426 }
5427 else
5428 {
5429 /* Track dynamic relocs needed for local syms too.
5430 We really need local syms available to do this
5431 easily. Oh well. */
5432 asection *s;
5433 void *vpp;
5434 Elf_Internal_Sym *isym;
5435
5436 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5437 abfd, r_symndx);
5438 if (isym == NULL)
5439 return FALSE;
5440
5441 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5442 if (s == NULL)
5443 s = sec;
5444
5445 vpp = &elf_section_data (s)->local_dynrel;
5446 head = (struct ppc_dyn_relocs **) vpp;
5447 }
5448
5449 p = *head;
5450 if (p == NULL || p->sec != sec)
5451 {
5452 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5453 if (p == NULL)
5454 return FALSE;
5455 p->next = *head;
5456 *head = p;
5457 p->sec = sec;
5458 p->count = 0;
5459 p->pc_count = 0;
5460 }
5461
5462 p->count += 1;
5463 if (!must_be_dyn_reloc (info, r_type))
5464 p->pc_count += 1;
5465 }
5466 break;
5467
5468 default:
5469 break;
5470 }
5471 }
5472
5473 return TRUE;
5474}
5475
5476/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5477 of the code entry point, and its section. */
5478
5479static bfd_vma
5480opd_entry_value (asection *opd_sec,
5481 bfd_vma offset,
5482 asection **code_sec,
5483 bfd_vma *code_off)
5484{
5485 bfd *opd_bfd = opd_sec->owner;
5486 Elf_Internal_Rela *relocs;
5487 Elf_Internal_Rela *lo, *hi, *look;
5488 bfd_vma val;
5489
5490 /* No relocs implies we are linking a --just-symbols object. */
5491 if (opd_sec->reloc_count == 0)
5492 {
5493 char buf[8];
5494
5495 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5496 return (bfd_vma) -1;
5497
5498 val = bfd_get_64 (opd_bfd, buf);
5499 if (code_sec != NULL)
5500 {
5501 asection *sec, *likely = NULL;
5502 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5503 if (sec->vma <= val
5504 && (sec->flags & SEC_LOAD) != 0
5505 && (sec->flags & SEC_ALLOC) != 0)
5506 likely = sec;
5507 if (likely != NULL)
5508 {
5509 *code_sec = likely;
5510 if (code_off != NULL)
5511 *code_off = val - likely->vma;
5512 }
5513 }
5514 return val;
5515 }
5516
5517 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5518
5519 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5520 if (relocs == NULL)
5521 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5522
5523 /* Go find the opd reloc at the sym address. */
5524 lo = relocs;
5525 BFD_ASSERT (lo != NULL);
5526 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5527 val = (bfd_vma) -1;
5528 while (lo < hi)
5529 {
5530 look = lo + (hi - lo) / 2;
5531 if (look->r_offset < offset)
5532 lo = look + 1;
5533 else if (look->r_offset > offset)
5534 hi = look;
5535 else
5536 {
5537 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5538
5539 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5540 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5541 {
5542 unsigned long symndx = ELF64_R_SYM (look->r_info);
5543 asection *sec;
5544
5545 if (symndx < symtab_hdr->sh_info)
5546 {
5547 Elf_Internal_Sym *sym;
5548
5549 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5550 if (sym == NULL)
5551 {
5552 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5553 symtab_hdr->sh_info,
5554 0, NULL, NULL, NULL);
5555 if (sym == NULL)
5556 break;
5557 symtab_hdr->contents = (bfd_byte *) sym;
5558 }
5559
5560 sym += symndx;
5561 val = sym->st_value;
5562 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5563 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5564 }
5565 else
5566 {
5567 struct elf_link_hash_entry **sym_hashes;
5568 struct elf_link_hash_entry *rh;
5569
5570 sym_hashes = elf_sym_hashes (opd_bfd);
5571 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5572 rh = elf_follow_link (rh);
5573 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5574 || rh->root.type == bfd_link_hash_defweak);
5575 val = rh->root.u.def.value;
5576 sec = rh->root.u.def.section;
5577 }
5578 val += look->r_addend;
5579 if (code_off != NULL)
5580 *code_off = val;
5581 if (code_sec != NULL)
5582 *code_sec = sec;
5583 if (sec != NULL && sec->output_section != NULL)
5584 val += sec->output_section->vma + sec->output_offset;
5585 }
5586 break;
5587 }
5588 }
5589
5590 return val;
5591}
5592
5593/* Return true if symbol is defined in a regular object file. */
5594
5595static bfd_boolean
5596is_static_defined (struct elf_link_hash_entry *h)
5597{
5598 return ((h->root.type == bfd_link_hash_defined
5599 || h->root.type == bfd_link_hash_defweak)
5600 && h->root.u.def.section != NULL
5601 && h->root.u.def.section->output_section != NULL);
5602}
5603
5604/* If FDH is a function descriptor symbol, return the associated code
5605 entry symbol if it is defined. Return NULL otherwise. */
5606
5607static struct ppc_link_hash_entry *
5608defined_code_entry (struct ppc_link_hash_entry *fdh)
5609{
5610 if (fdh->is_func_descriptor)
5611 {
5612 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5613 if (fh->elf.root.type == bfd_link_hash_defined
5614 || fh->elf.root.type == bfd_link_hash_defweak)
5615 return fh;
5616 }
5617 return NULL;
5618}
5619
5620/* If FH is a function code entry symbol, return the associated
5621 function descriptor symbol if it is defined. Return NULL otherwise. */
5622
5623static struct ppc_link_hash_entry *
5624defined_func_desc (struct ppc_link_hash_entry *fh)
5625{
5626 if (fh->oh != NULL
5627 && fh->oh->is_func_descriptor)
5628 {
5629 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5630 if (fdh->elf.root.type == bfd_link_hash_defined
5631 || fdh->elf.root.type == bfd_link_hash_defweak)
5632 return fdh;
5633 }
5634 return NULL;
5635}
5636
5637/* Mark all our entry sym sections, both opd and code section. */
5638
5639static void
5640ppc64_elf_gc_keep (struct bfd_link_info *info)
5641{
5642 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5643 struct bfd_sym_chain *sym;
5644
5645 if (htab == NULL)
5646 return;
5647
5648 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5649 {
5650 struct ppc_link_hash_entry *eh, *fh;
5651 asection *sec;
5652
5653 eh = (struct ppc_link_hash_entry *)
5654 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5655 if (eh == NULL)
5656 continue;
5657 if (eh->elf.root.type != bfd_link_hash_defined
5658 && eh->elf.root.type != bfd_link_hash_defweak)
5659 continue;
5660
5661 fh = defined_code_entry (eh);
5662 if (fh != NULL)
5663 {
5664 sec = fh->elf.root.u.def.section;
5665 sec->flags |= SEC_KEEP;
5666 }
5667 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5668 && opd_entry_value (eh->elf.root.u.def.section,
5669 eh->elf.root.u.def.value,
5670 &sec, NULL) != (bfd_vma) -1)
5671 sec->flags |= SEC_KEEP;
5672
5673 sec = eh->elf.root.u.def.section;
5674 sec->flags |= SEC_KEEP;
5675 }
5676}
5677
5678/* Mark sections containing dynamically referenced symbols. When
5679 building shared libraries, we must assume that any visible symbol is
5680 referenced. */
5681
5682static bfd_boolean
5683ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5684{
5685 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5686 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5687 struct ppc_link_hash_entry *fdh;
5688
5689 if (eh->elf.root.type == bfd_link_hash_warning)
5690 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5691
5692 /* Dynamic linking info is on the func descriptor sym. */
5693 fdh = defined_func_desc (eh);
5694 if (fdh != NULL)
5695 eh = fdh;
5696
5697 if ((eh->elf.root.type == bfd_link_hash_defined
5698 || eh->elf.root.type == bfd_link_hash_defweak)
5699 && (eh->elf.ref_dynamic
5700 || (!info->executable
5701 && eh->elf.def_regular
5702 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5703 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5704 {
5705 asection *code_sec;
5706 struct ppc_link_hash_entry *fh;
5707
5708 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5709
5710 /* Function descriptor syms cause the associated
5711 function code sym section to be marked. */
5712 fh = defined_code_entry (eh);
5713 if (fh != NULL)
5714 {
5715 code_sec = fh->elf.root.u.def.section;
5716 code_sec->flags |= SEC_KEEP;
5717 }
5718 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5719 && opd_entry_value (eh->elf.root.u.def.section,
5720 eh->elf.root.u.def.value,
5721 &code_sec, NULL) != (bfd_vma) -1)
5722 code_sec->flags |= SEC_KEEP;
5723 }
5724
5725 return TRUE;
5726}
5727
5728/* Return the section that should be marked against GC for a given
5729 relocation. */
5730
5731static asection *
5732ppc64_elf_gc_mark_hook (asection *sec,
5733 struct bfd_link_info *info,
5734 Elf_Internal_Rela *rel,
5735 struct elf_link_hash_entry *h,
5736 Elf_Internal_Sym *sym)
5737{
5738 asection *rsec;
5739
5740 /* Syms return NULL if we're marking .opd, so we avoid marking all
5741 function sections, as all functions are referenced in .opd. */
5742 rsec = NULL;
5743 if (get_opd_info (sec) != NULL)
5744 return rsec;
5745
5746 if (h != NULL)
5747 {
5748 enum elf_ppc64_reloc_type r_type;
5749 struct ppc_link_hash_entry *eh, *fh, *fdh;
5750
5751 r_type = ELF64_R_TYPE (rel->r_info);
5752 switch (r_type)
5753 {
5754 case R_PPC64_GNU_VTINHERIT:
5755 case R_PPC64_GNU_VTENTRY:
5756 break;
5757
5758 default:
5759 switch (h->root.type)
5760 {
5761 case bfd_link_hash_defined:
5762 case bfd_link_hash_defweak:
5763 eh = (struct ppc_link_hash_entry *) h;
5764 fdh = defined_func_desc (eh);
5765 if (fdh != NULL)
5766 eh = fdh;
5767
5768 /* Function descriptor syms cause the associated
5769 function code sym section to be marked. */
5770 fh = defined_code_entry (eh);
5771 if (fh != NULL)
5772 {
5773 /* They also mark their opd section. */
5774 eh->elf.root.u.def.section->gc_mark = 1;
5775
5776 rsec = fh->elf.root.u.def.section;
5777 }
5778 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5779 && opd_entry_value (eh->elf.root.u.def.section,
5780 eh->elf.root.u.def.value,
5781 &rsec, NULL) != (bfd_vma) -1)
5782 eh->elf.root.u.def.section->gc_mark = 1;
5783 else
5784 rsec = h->root.u.def.section;
5785 break;
5786
5787 case bfd_link_hash_common:
5788 rsec = h->root.u.c.p->section;
5789 break;
5790
5791 default:
5792 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5793 }
5794 }
5795 }
5796 else
5797 {
5798 struct _opd_sec_data *opd;
5799
5800 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5801 opd = get_opd_info (rsec);
5802 if (opd != NULL && opd->func_sec != NULL)
5803 {
5804 rsec->gc_mark = 1;
5805
5806 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5807 }
5808 }
5809
5810 return rsec;
5811}
5812
5813/* Update the .got, .plt. and dynamic reloc reference counts for the
5814 section being removed. */
5815
5816static bfd_boolean
5817ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5818 asection *sec, const Elf_Internal_Rela *relocs)
5819{
5820 struct ppc_link_hash_table *htab;
5821 Elf_Internal_Shdr *symtab_hdr;
5822 struct elf_link_hash_entry **sym_hashes;
5823 struct got_entry **local_got_ents;
5824 const Elf_Internal_Rela *rel, *relend;
5825
5826 if (info->relocatable)
5827 return TRUE;
5828
5829 if ((sec->flags & SEC_ALLOC) == 0)
5830 return TRUE;
5831
5832 elf_section_data (sec)->local_dynrel = NULL;
5833
5834 htab = ppc_hash_table (info);
5835 if (htab == NULL)
5836 return FALSE;
5837
5838 symtab_hdr = &elf_symtab_hdr (abfd);
5839 sym_hashes = elf_sym_hashes (abfd);
5840 local_got_ents = elf_local_got_ents (abfd);
5841
5842 relend = relocs + sec->reloc_count;
5843 for (rel = relocs; rel < relend; rel++)
5844 {
5845 unsigned long r_symndx;
5846 enum elf_ppc64_reloc_type r_type;
5847 struct elf_link_hash_entry *h = NULL;
5848 unsigned char tls_type = 0;
5849
5850 r_symndx = ELF64_R_SYM (rel->r_info);
5851 r_type = ELF64_R_TYPE (rel->r_info);
5852 if (r_symndx >= symtab_hdr->sh_info)
5853 {
5854 struct ppc_link_hash_entry *eh;
5855 struct ppc_dyn_relocs **pp;
5856 struct ppc_dyn_relocs *p;
5857
5858 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5859 h = elf_follow_link (h);
5860 eh = (struct ppc_link_hash_entry *) h;
5861
5862 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5863 if (p->sec == sec)
5864 {
5865 /* Everything must go for SEC. */
5866 *pp = p->next;
5867 break;
5868 }
5869 }
5870
5871 if (is_branch_reloc (r_type))
5872 {
5873 struct plt_entry **ifunc = NULL;
5874 if (h != NULL)
5875 {
5876 if (h->type == STT_GNU_IFUNC)
5877 ifunc = &h->plt.plist;
5878 }
5879 else if (local_got_ents != NULL)
5880 {
5881 struct plt_entry **local_plt = (struct plt_entry **)
5882 (local_got_ents + symtab_hdr->sh_info);
5883 unsigned char *local_got_tls_masks = (unsigned char *)
5884 (local_plt + symtab_hdr->sh_info);
5885 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5886 ifunc = local_plt + r_symndx;
5887 }
5888 if (ifunc != NULL)
5889 {
5890 struct plt_entry *ent;
5891
5892 for (ent = *ifunc; ent != NULL; ent = ent->next)
5893 if (ent->addend == rel->r_addend)
5894 break;
5895 if (ent == NULL)
5896 abort ();
5897 if (ent->plt.refcount > 0)
5898 ent->plt.refcount -= 1;
5899 continue;
5900 }
5901 }
5902
5903 switch (r_type)
5904 {
5905 case R_PPC64_GOT_TLSLD16:
5906 case R_PPC64_GOT_TLSLD16_LO:
5907 case R_PPC64_GOT_TLSLD16_HI:
5908 case R_PPC64_GOT_TLSLD16_HA:
5909 tls_type = TLS_TLS | TLS_LD;
5910 goto dogot;
5911
5912 case R_PPC64_GOT_TLSGD16:
5913 case R_PPC64_GOT_TLSGD16_LO:
5914 case R_PPC64_GOT_TLSGD16_HI:
5915 case R_PPC64_GOT_TLSGD16_HA:
5916 tls_type = TLS_TLS | TLS_GD;
5917 goto dogot;
5918
5919 case R_PPC64_GOT_TPREL16_DS:
5920 case R_PPC64_GOT_TPREL16_LO_DS:
5921 case R_PPC64_GOT_TPREL16_HI:
5922 case R_PPC64_GOT_TPREL16_HA:
5923 tls_type = TLS_TLS | TLS_TPREL;
5924 goto dogot;
5925
5926 case R_PPC64_GOT_DTPREL16_DS:
5927 case R_PPC64_GOT_DTPREL16_LO_DS:
5928 case R_PPC64_GOT_DTPREL16_HI:
5929 case R_PPC64_GOT_DTPREL16_HA:
5930 tls_type = TLS_TLS | TLS_DTPREL;
5931 goto dogot;
5932
5933 case R_PPC64_GOT16:
5934 case R_PPC64_GOT16_DS:
5935 case R_PPC64_GOT16_HA:
5936 case R_PPC64_GOT16_HI:
5937 case R_PPC64_GOT16_LO:
5938 case R_PPC64_GOT16_LO_DS:
5939 dogot:
5940 {
5941 struct got_entry *ent;
5942
5943 if (h != NULL)
5944 ent = h->got.glist;
5945 else
5946 ent = local_got_ents[r_symndx];
5947
5948 for (; ent != NULL; ent = ent->next)
5949 if (ent->addend == rel->r_addend
5950 && ent->owner == abfd
5951 && ent->tls_type == tls_type)
5952 break;
5953 if (ent == NULL)
5954 abort ();
5955 if (ent->got.refcount > 0)
5956 ent->got.refcount -= 1;
5957 }
5958 break;
5959
5960 case R_PPC64_PLT16_HA:
5961 case R_PPC64_PLT16_HI:
5962 case R_PPC64_PLT16_LO:
5963 case R_PPC64_PLT32:
5964 case R_PPC64_PLT64:
5965 case R_PPC64_REL14:
5966 case R_PPC64_REL14_BRNTAKEN:
5967 case R_PPC64_REL14_BRTAKEN:
5968 case R_PPC64_REL24:
5969 if (h != NULL)
5970 {
5971 struct plt_entry *ent;
5972
5973 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5974 if (ent->addend == rel->r_addend)
5975 break;
5976 if (ent != NULL && ent->plt.refcount > 0)
5977 ent->plt.refcount -= 1;
5978 }
5979 break;
5980
5981 default:
5982 break;
5983 }
5984 }
5985 return TRUE;
5986}
5987
5988/* The maximum size of .sfpr. */
5989#define SFPR_MAX (218*4)
5990
5991struct sfpr_def_parms
5992{
5993 const char name[12];
5994 unsigned char lo, hi;
5995 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5996 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5997};
5998
5999/* Auto-generate _save*, _rest* functions in .sfpr. */
6000
6001static bfd_boolean
6002sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6003{
6004 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6005 unsigned int i;
6006 size_t len = strlen (parm->name);
6007 bfd_boolean writing = FALSE;
6008 char sym[16];
6009
6010 if (htab == NULL)
6011 return FALSE;
6012
6013 memcpy (sym, parm->name, len);
6014 sym[len + 2] = 0;
6015
6016 for (i = parm->lo; i <= parm->hi; i++)
6017 {
6018 struct elf_link_hash_entry *h;
6019
6020 sym[len + 0] = i / 10 + '0';
6021 sym[len + 1] = i % 10 + '0';
6022 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6023 if (h != NULL
6024 && !h->def_regular)
6025 {
6026 h->root.type = bfd_link_hash_defined;
6027 h->root.u.def.section = htab->sfpr;
6028 h->root.u.def.value = htab->sfpr->size;
6029 h->type = STT_FUNC;
6030 h->def_regular = 1;
6031 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6032 writing = TRUE;
6033 if (htab->sfpr->contents == NULL)
6034 {
6035 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6036 if (htab->sfpr->contents == NULL)
6037 return FALSE;
6038 }
6039 }
6040 if (writing)
6041 {
6042 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6043 if (i != parm->hi)
6044 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6045 else
6046 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6047 htab->sfpr->size = p - htab->sfpr->contents;
6048 }
6049 }
6050
6051 return TRUE;
6052}
6053
6054static bfd_byte *
6055savegpr0 (bfd *abfd, bfd_byte *p, int r)
6056{
6057 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6058 return p + 4;
6059}
6060
6061static bfd_byte *
6062savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6063{
6064 p = savegpr0 (abfd, p, r);
6065 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6066 p = p + 4;
6067 bfd_put_32 (abfd, BLR, p);
6068 return p + 4;
6069}
6070
6071static bfd_byte *
6072restgpr0 (bfd *abfd, bfd_byte *p, int r)
6073{
6074 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6075 return p + 4;
6076}
6077
6078static bfd_byte *
6079restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6080{
6081 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6082 p = p + 4;
6083 p = restgpr0 (abfd, p, r);
6084 bfd_put_32 (abfd, MTLR_R0, p);
6085 p = p + 4;
6086 if (r == 29)
6087 {
6088 p = restgpr0 (abfd, p, 30);
6089 p = restgpr0 (abfd, p, 31);
6090 }
6091 bfd_put_32 (abfd, BLR, p);
6092 return p + 4;
6093}
6094
6095static bfd_byte *
6096savegpr1 (bfd *abfd, bfd_byte *p, int r)
6097{
6098 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6099 return p + 4;
6100}
6101
6102static bfd_byte *
6103savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6104{
6105 p = savegpr1 (abfd, p, r);
6106 bfd_put_32 (abfd, BLR, p);
6107 return p + 4;
6108}
6109
6110static bfd_byte *
6111restgpr1 (bfd *abfd, bfd_byte *p, int r)
6112{
6113 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6114 return p + 4;
6115}
6116
6117static bfd_byte *
6118restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6119{
6120 p = restgpr1 (abfd, p, r);
6121 bfd_put_32 (abfd, BLR, p);
6122 return p + 4;
6123}
6124
6125static bfd_byte *
6126savefpr (bfd *abfd, bfd_byte *p, int r)
6127{
6128 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6129 return p + 4;
6130}
6131
6132static bfd_byte *
6133savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6134{
6135 p = savefpr (abfd, p, r);
6136 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6137 p = p + 4;
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140}
6141
6142static bfd_byte *
6143restfpr (bfd *abfd, bfd_byte *p, int r)
6144{
6145 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6146 return p + 4;
6147}
6148
6149static bfd_byte *
6150restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6151{
6152 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6153 p = p + 4;
6154 p = restfpr (abfd, p, r);
6155 bfd_put_32 (abfd, MTLR_R0, p);
6156 p = p + 4;
6157 if (r == 29)
6158 {
6159 p = restfpr (abfd, p, 30);
6160 p = restfpr (abfd, p, 31);
6161 }
6162 bfd_put_32 (abfd, BLR, p);
6163 return p + 4;
6164}
6165
6166static bfd_byte *
6167savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6168{
6169 p = savefpr (abfd, p, r);
6170 bfd_put_32 (abfd, BLR, p);
6171 return p + 4;
6172}
6173
6174static bfd_byte *
6175restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6176{
6177 p = restfpr (abfd, p, r);
6178 bfd_put_32 (abfd, BLR, p);
6179 return p + 4;
6180}
6181
6182static bfd_byte *
6183savevr (bfd *abfd, bfd_byte *p, int r)
6184{
6185 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6186 p = p + 4;
6187 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6188 return p + 4;
6189}
6190
6191static bfd_byte *
6192savevr_tail (bfd *abfd, bfd_byte *p, int r)
6193{
6194 p = savevr (abfd, p, r);
6195 bfd_put_32 (abfd, BLR, p);
6196 return p + 4;
6197}
6198
6199static bfd_byte *
6200restvr (bfd *abfd, bfd_byte *p, int r)
6201{
6202 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6203 p = p + 4;
6204 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6205 return p + 4;
6206}
6207
6208static bfd_byte *
6209restvr_tail (bfd *abfd, bfd_byte *p, int r)
6210{
6211 p = restvr (abfd, p, r);
6212 bfd_put_32 (abfd, BLR, p);
6213 return p + 4;
6214}
6215
6216/* Called via elf_link_hash_traverse to transfer dynamic linking
6217 information on function code symbol entries to their corresponding
6218 function descriptor symbol entries. */
6219
6220static bfd_boolean
6221func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6222{
6223 struct bfd_link_info *info;
6224 struct ppc_link_hash_table *htab;
6225 struct plt_entry *ent;
6226 struct ppc_link_hash_entry *fh;
6227 struct ppc_link_hash_entry *fdh;
6228 bfd_boolean force_local;
6229
6230 fh = (struct ppc_link_hash_entry *) h;
6231 if (fh->elf.root.type == bfd_link_hash_indirect)
6232 return TRUE;
6233
6234 if (fh->elf.root.type == bfd_link_hash_warning)
6235 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6236
6237 info = inf;
6238 htab = ppc_hash_table (info);
6239 if (htab == NULL)
6240 return FALSE;
6241
6242 /* Resolve undefined references to dot-symbols as the value
6243 in the function descriptor, if we have one in a regular object.
6244 This is to satisfy cases like ".quad .foo". Calls to functions
6245 in dynamic objects are handled elsewhere. */
6246 if (fh->elf.root.type == bfd_link_hash_undefweak
6247 && fh->was_undefined
6248 && (fdh = defined_func_desc (fh)) != NULL
6249 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6250 && opd_entry_value (fdh->elf.root.u.def.section,
6251 fdh->elf.root.u.def.value,
6252 &fh->elf.root.u.def.section,
6253 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6254 {
6255 fh->elf.root.type = fdh->elf.root.type;
6256 fh->elf.forced_local = 1;
6257 fh->elf.def_regular = fdh->elf.def_regular;
6258 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6259 }
6260
6261 /* If this is a function code symbol, transfer dynamic linking
6262 information to the function descriptor symbol. */
6263 if (!fh->is_func)
6264 return TRUE;
6265
6266 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6267 if (ent->plt.refcount > 0)
6268 break;
6269 if (ent == NULL
6270 || fh->elf.root.root.string[0] != '.'
6271 || fh->elf.root.root.string[1] == '\0')
6272 return TRUE;
6273
6274 /* Find the corresponding function descriptor symbol. Create it
6275 as undefined if necessary. */
6276
6277 fdh = lookup_fdh (fh, htab);
6278 if (fdh == NULL
6279 && !info->executable
6280 && (fh->elf.root.type == bfd_link_hash_undefined
6281 || fh->elf.root.type == bfd_link_hash_undefweak))
6282 {
6283 fdh = make_fdh (info, fh);
6284 if (fdh == NULL)
6285 return FALSE;
6286 }
6287
6288 /* Fake function descriptors are made undefweak. If the function
6289 code symbol is strong undefined, make the fake sym the same.
6290 If the function code symbol is defined, then force the fake
6291 descriptor local; We can't support overriding of symbols in a
6292 shared library on a fake descriptor. */
6293
6294 if (fdh != NULL
6295 && fdh->fake
6296 && fdh->elf.root.type == bfd_link_hash_undefweak)
6297 {
6298 if (fh->elf.root.type == bfd_link_hash_undefined)
6299 {
6300 fdh->elf.root.type = bfd_link_hash_undefined;
6301 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6302 }
6303 else if (fh->elf.root.type == bfd_link_hash_defined
6304 || fh->elf.root.type == bfd_link_hash_defweak)
6305 {
6306 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6307 }
6308 }
6309
6310 if (fdh != NULL
6311 && !fdh->elf.forced_local
6312 && (!info->executable
6313 || fdh->elf.def_dynamic
6314 || fdh->elf.ref_dynamic
6315 || (fdh->elf.root.type == bfd_link_hash_undefweak
6316 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6317 {
6318 if (fdh->elf.dynindx == -1)
6319 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6320 return FALSE;
6321 fdh->elf.ref_regular |= fh->elf.ref_regular;
6322 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6323 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6324 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6325 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6326 {
6327 move_plt_plist (fh, fdh);
6328 fdh->elf.needs_plt = 1;
6329 }
6330 fdh->is_func_descriptor = 1;
6331 fdh->oh = fh;
6332 fh->oh = fdh;
6333 }
6334
6335 /* Now that the info is on the function descriptor, clear the
6336 function code sym info. Any function code syms for which we
6337 don't have a definition in a regular file, we force local.
6338 This prevents a shared library from exporting syms that have
6339 been imported from another library. Function code syms that
6340 are really in the library we must leave global to prevent the
6341 linker dragging in a definition from a static library. */
6342 force_local = (!fh->elf.def_regular
6343 || fdh == NULL
6344 || !fdh->elf.def_regular
6345 || fdh->elf.forced_local);
6346 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6347
6348 return TRUE;
6349}
6350
6351/* Called near the start of bfd_elf_size_dynamic_sections. We use
6352 this hook to a) provide some gcc support functions, and b) transfer
6353 dynamic linking information gathered so far on function code symbol
6354 entries, to their corresponding function descriptor symbol entries. */
6355
6356static bfd_boolean
6357ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6358 struct bfd_link_info *info)
6359{
6360 struct ppc_link_hash_table *htab;
6361 unsigned int i;
6362 const struct sfpr_def_parms funcs[] =
6363 {
6364 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6365 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6366 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6367 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6368 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6369 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6370 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6371 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6372 { "._savef", 14, 31, savefpr, savefpr1_tail },
6373 { "._restf", 14, 31, restfpr, restfpr1_tail },
6374 { "_savevr_", 20, 31, savevr, savevr_tail },
6375 { "_restvr_", 20, 31, restvr, restvr_tail }
6376 };
6377
6378 htab = ppc_hash_table (info);
6379 if (htab == NULL)
6380 return FALSE;
6381
6382 if (htab->sfpr == NULL)
6383 /* We don't have any relocs. */
6384 return TRUE;
6385
6386 /* Provide any missing _save* and _rest* functions. */
6387 htab->sfpr->size = 0;
6388 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6389 if (!sfpr_define (info, &funcs[i]))
6390 return FALSE;
6391
6392 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6393
6394 if (htab->sfpr->size == 0)
6395 htab->sfpr->flags |= SEC_EXCLUDE;
6396
6397 return TRUE;
6398}
6399
6400/* Adjust a symbol defined by a dynamic object and referenced by a
6401 regular object. The current definition is in some section of the
6402 dynamic object, but we're not including those sections. We have to
6403 change the definition to something the rest of the link can
6404 understand. */
6405
6406static bfd_boolean
6407ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6408 struct elf_link_hash_entry *h)
6409{
6410 struct ppc_link_hash_table *htab;
6411 asection *s;
6412
6413 htab = ppc_hash_table (info);
6414 if (htab == NULL)
6415 return FALSE;
6416
6417 /* Deal with function syms. */
6418 if (h->type == STT_FUNC
6419 || h->type == STT_GNU_IFUNC
6420 || h->needs_plt)
6421 {
6422 /* Clear procedure linkage table information for any symbol that
6423 won't need a .plt entry. */
6424 struct plt_entry *ent;
6425 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6426 if (ent->plt.refcount > 0)
6427 break;
6428 if (ent == NULL
6429 || (h->type != STT_GNU_IFUNC
6430 && (SYMBOL_CALLS_LOCAL (info, h)
6431 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6432 && h->root.type == bfd_link_hash_undefweak))))
6433 {
6434 h->plt.plist = NULL;
6435 h->needs_plt = 0;
6436 }
6437 }
6438 else
6439 h->plt.plist = NULL;
6440
6441 /* If this is a weak symbol, and there is a real definition, the
6442 processor independent code will have arranged for us to see the
6443 real definition first, and we can just use the same value. */
6444 if (h->u.weakdef != NULL)
6445 {
6446 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6447 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6448 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6449 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6450 if (ELIMINATE_COPY_RELOCS)
6451 h->non_got_ref = h->u.weakdef->non_got_ref;
6452 return TRUE;
6453 }
6454
6455 /* If we are creating a shared library, we must presume that the
6456 only references to the symbol are via the global offset table.
6457 For such cases we need not do anything here; the relocations will
6458 be handled correctly by relocate_section. */
6459 if (info->shared)
6460 return TRUE;
6461
6462 /* If there are no references to this symbol that do not use the
6463 GOT, we don't need to generate a copy reloc. */
6464 if (!h->non_got_ref)
6465 return TRUE;
6466
6467 /* Don't generate a copy reloc for symbols defined in the executable. */
6468 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6469 return TRUE;
6470
6471 if (ELIMINATE_COPY_RELOCS)
6472 {
6473 struct ppc_link_hash_entry * eh;
6474 struct ppc_dyn_relocs *p;
6475
6476 eh = (struct ppc_link_hash_entry *) h;
6477 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6478 {
6479 s = p->sec->output_section;
6480 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6481 break;
6482 }
6483
6484 /* If we didn't find any dynamic relocs in read-only sections, then
6485 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6486 if (p == NULL)
6487 {
6488 h->non_got_ref = 0;
6489 return TRUE;
6490 }
6491 }
6492
6493 if (h->plt.plist != NULL)
6494 {
6495 /* We should never get here, but unfortunately there are versions
6496 of gcc out there that improperly (for this ABI) put initialized
6497 function pointers, vtable refs and suchlike in read-only
6498 sections. Allow them to proceed, but warn that this might
6499 break at runtime. */
6500 (*_bfd_error_handler)
6501 (_("copy reloc against `%s' requires lazy plt linking; "
6502 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6503 h->root.root.string);
6504 }
6505
6506 /* This is a reference to a symbol defined by a dynamic object which
6507 is not a function. */
6508
6509 if (h->size == 0)
6510 {
6511 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6512 h->root.root.string);
6513 return TRUE;
6514 }
6515
6516 /* We must allocate the symbol in our .dynbss section, which will
6517 become part of the .bss section of the executable. There will be
6518 an entry for this symbol in the .dynsym section. The dynamic
6519 object will contain position independent code, so all references
6520 from the dynamic object to this symbol will go through the global
6521 offset table. The dynamic linker will use the .dynsym entry to
6522 determine the address it must put in the global offset table, so
6523 both the dynamic object and the regular object will refer to the
6524 same memory location for the variable. */
6525
6526 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6527 to copy the initial value out of the dynamic object and into the
6528 runtime process image. We need to remember the offset into the
6529 .rela.bss section we are going to use. */
6530 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6531 {
6532 htab->relbss->size += sizeof (Elf64_External_Rela);
6533 h->needs_copy = 1;
6534 }
6535
6536 s = htab->dynbss;
6537
6538 return _bfd_elf_adjust_dynamic_copy (h, s);
6539}
6540
6541/* If given a function descriptor symbol, hide both the function code
6542 sym and the descriptor. */
6543static void
6544ppc64_elf_hide_symbol (struct bfd_link_info *info,
6545 struct elf_link_hash_entry *h,
6546 bfd_boolean force_local)
6547{
6548 struct ppc_link_hash_entry *eh;
6549 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6550
6551 eh = (struct ppc_link_hash_entry *) h;
6552 if (eh->is_func_descriptor)
6553 {
6554 struct ppc_link_hash_entry *fh = eh->oh;
6555
6556 if (fh == NULL)
6557 {
6558 const char *p, *q;
6559 struct ppc_link_hash_table *htab;
6560 char save;
6561
6562 /* We aren't supposed to use alloca in BFD because on
6563 systems which do not have alloca the version in libiberty
6564 calls xmalloc, which might cause the program to crash
6565 when it runs out of memory. This function doesn't have a
6566 return status, so there's no way to gracefully return an
6567 error. So cheat. We know that string[-1] can be safely
6568 accessed; It's either a string in an ELF string table,
6569 or allocated in an objalloc structure. */
6570
6571 p = eh->elf.root.root.string - 1;
6572 save = *p;
6573 *(char *) p = '.';
6574 htab = ppc_hash_table (info);
6575 if (htab == NULL)
6576 return;
6577
6578 fh = (struct ppc_link_hash_entry *)
6579 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6580 *(char *) p = save;
6581
6582 /* Unfortunately, if it so happens that the string we were
6583 looking for was allocated immediately before this string,
6584 then we overwrote the string terminator. That's the only
6585 reason the lookup should fail. */
6586 if (fh == NULL)
6587 {
6588 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6589 while (q >= eh->elf.root.root.string && *q == *p)
6590 --q, --p;
6591 if (q < eh->elf.root.root.string && *p == '.')
6592 fh = (struct ppc_link_hash_entry *)
6593 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6594 }
6595 if (fh != NULL)
6596 {
6597 eh->oh = fh;
6598 fh->oh = eh;
6599 }
6600 }
6601 if (fh != NULL)
6602 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6603 }
6604}
6605
6606static bfd_boolean
6607get_sym_h (struct elf_link_hash_entry **hp,
6608 Elf_Internal_Sym **symp,
6609 asection **symsecp,
6610 unsigned char **tls_maskp,
6611 Elf_Internal_Sym **locsymsp,
6612 unsigned long r_symndx,
6613 bfd *ibfd)
6614{
6615 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6616
6617 if (r_symndx >= symtab_hdr->sh_info)
6618 {
6619 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6620 struct elf_link_hash_entry *h;
6621
6622 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6623 h = elf_follow_link (h);
6624
6625 if (hp != NULL)
6626 *hp = h;
6627
6628 if (symp != NULL)
6629 *symp = NULL;
6630
6631 if (symsecp != NULL)
6632 {
6633 asection *symsec = NULL;
6634 if (h->root.type == bfd_link_hash_defined
6635 || h->root.type == bfd_link_hash_defweak)
6636 symsec = h->root.u.def.section;
6637 *symsecp = symsec;
6638 }
6639
6640 if (tls_maskp != NULL)
6641 {
6642 struct ppc_link_hash_entry *eh;
6643
6644 eh = (struct ppc_link_hash_entry *) h;
6645 *tls_maskp = &eh->tls_mask;
6646 }
6647 }
6648 else
6649 {
6650 Elf_Internal_Sym *sym;
6651 Elf_Internal_Sym *locsyms = *locsymsp;
6652
6653 if (locsyms == NULL)
6654 {
6655 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6656 if (locsyms == NULL)
6657 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6658 symtab_hdr->sh_info,
6659 0, NULL, NULL, NULL);
6660 if (locsyms == NULL)
6661 return FALSE;
6662 *locsymsp = locsyms;
6663 }
6664 sym = locsyms + r_symndx;
6665
6666 if (hp != NULL)
6667 *hp = NULL;
6668
6669 if (symp != NULL)
6670 *symp = sym;
6671
6672 if (symsecp != NULL)
6673 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6674
6675 if (tls_maskp != NULL)
6676 {
6677 struct got_entry **lgot_ents;
6678 unsigned char *tls_mask;
6679
6680 tls_mask = NULL;
6681 lgot_ents = elf_local_got_ents (ibfd);
6682 if (lgot_ents != NULL)
6683 {
6684 struct plt_entry **local_plt = (struct plt_entry **)
6685 (lgot_ents + symtab_hdr->sh_info);
6686 unsigned char *lgot_masks = (unsigned char *)
6687 (local_plt + symtab_hdr->sh_info);
6688 tls_mask = &lgot_masks[r_symndx];
6689 }
6690 *tls_maskp = tls_mask;
6691 }
6692 }
6693 return TRUE;
6694}
6695
6696/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6697 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6698 type suitable for optimization, and 1 otherwise. */
6699
6700static int
6701get_tls_mask (unsigned char **tls_maskp,
6702 unsigned long *toc_symndx,
6703 bfd_vma *toc_addend,
6704 Elf_Internal_Sym **locsymsp,
6705 const Elf_Internal_Rela *rel,
6706 bfd *ibfd)
6707{
6708 unsigned long r_symndx;
6709 int next_r;
6710 struct elf_link_hash_entry *h;
6711 Elf_Internal_Sym *sym;
6712 asection *sec;
6713 bfd_vma off;
6714
6715 r_symndx = ELF64_R_SYM (rel->r_info);
6716 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6717 return 0;
6718
6719 if ((*tls_maskp != NULL && **tls_maskp != 0)
6720 || sec == NULL
6721 || ppc64_elf_section_data (sec) == NULL
6722 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6723 return 1;
6724
6725 /* Look inside a TOC section too. */
6726 if (h != NULL)
6727 {
6728 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6729 off = h->root.u.def.value;
6730 }
6731 else
6732 off = sym->st_value;
6733 off += rel->r_addend;
6734 BFD_ASSERT (off % 8 == 0);
6735 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6736 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6737 if (toc_symndx != NULL)
6738 *toc_symndx = r_symndx;
6739 if (toc_addend != NULL)
6740 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6741 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6742 return 0;
6743 if ((h == NULL || is_static_defined (h))
6744 && (next_r == -1 || next_r == -2))
6745 return 1 - next_r;
6746 return 1;
6747}
6748
6749/* Adjust all global syms defined in opd sections. In gcc generated
6750 code for the old ABI, these will already have been done. */
6751
6752static bfd_boolean
6753adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6754{
6755 struct ppc_link_hash_entry *eh;
6756 asection *sym_sec;
6757 struct _opd_sec_data *opd;
6758
6759 if (h->root.type == bfd_link_hash_indirect)
6760 return TRUE;
6761
6762 if (h->root.type == bfd_link_hash_warning)
6763 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6764
6765 if (h->root.type != bfd_link_hash_defined
6766 && h->root.type != bfd_link_hash_defweak)
6767 return TRUE;
6768
6769 eh = (struct ppc_link_hash_entry *) h;
6770 if (eh->adjust_done)
6771 return TRUE;
6772
6773 sym_sec = eh->elf.root.u.def.section;
6774 opd = get_opd_info (sym_sec);
6775 if (opd != NULL && opd->adjust != NULL)
6776 {
6777 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6778 if (adjust == -1)
6779 {
6780 /* This entry has been deleted. */
6781 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6782 if (dsec == NULL)
6783 {
6784 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6785 if (elf_discarded_section (dsec))
6786 {
6787 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6788 break;
6789 }
6790 }
6791 eh->elf.root.u.def.value = 0;
6792 eh->elf.root.u.def.section = dsec;
6793 }
6794 else
6795 eh->elf.root.u.def.value += adjust;
6796 eh->adjust_done = 1;
6797 }
6798 return TRUE;
6799}
6800
6801/* Handles decrementing dynamic reloc counts for the reloc specified by
6802 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6803 have already been determined. */
6804
6805static bfd_boolean
6806dec_dynrel_count (bfd_vma r_info,
6807 asection *sec,
6808 struct bfd_link_info *info,
6809 Elf_Internal_Sym **local_syms,
6810 struct elf_link_hash_entry *h,
6811 asection *sym_sec)
6812{
6813 enum elf_ppc64_reloc_type r_type;
6814 struct ppc_dyn_relocs *p;
6815 struct ppc_dyn_relocs **pp;
6816
6817 /* Can this reloc be dynamic? This switch, and later tests here
6818 should be kept in sync with the code in check_relocs. */
6819 r_type = ELF64_R_TYPE (r_info);
6820 switch (r_type)
6821 {
6822 default:
6823 return TRUE;
6824
6825 case R_PPC64_TPREL16:
6826 case R_PPC64_TPREL16_LO:
6827 case R_PPC64_TPREL16_HI:
6828 case R_PPC64_TPREL16_HA:
6829 case R_PPC64_TPREL16_DS:
6830 case R_PPC64_TPREL16_LO_DS:
6831 case R_PPC64_TPREL16_HIGHER:
6832 case R_PPC64_TPREL16_HIGHERA:
6833 case R_PPC64_TPREL16_HIGHEST:
6834 case R_PPC64_TPREL16_HIGHESTA:
6835 if (!info->shared)
6836 return TRUE;
6837
6838 case R_PPC64_TPREL64:
6839 case R_PPC64_DTPMOD64:
6840 case R_PPC64_DTPREL64:
6841 case R_PPC64_ADDR64:
6842 case R_PPC64_REL30:
6843 case R_PPC64_REL32:
6844 case R_PPC64_REL64:
6845 case R_PPC64_ADDR14:
6846 case R_PPC64_ADDR14_BRNTAKEN:
6847 case R_PPC64_ADDR14_BRTAKEN:
6848 case R_PPC64_ADDR16:
6849 case R_PPC64_ADDR16_DS:
6850 case R_PPC64_ADDR16_HA:
6851 case R_PPC64_ADDR16_HI:
6852 case R_PPC64_ADDR16_HIGHER:
6853 case R_PPC64_ADDR16_HIGHERA:
6854 case R_PPC64_ADDR16_HIGHEST:
6855 case R_PPC64_ADDR16_HIGHESTA:
6856 case R_PPC64_ADDR16_LO:
6857 case R_PPC64_ADDR16_LO_DS:
6858 case R_PPC64_ADDR24:
6859 case R_PPC64_ADDR32:
6860 case R_PPC64_UADDR16:
6861 case R_PPC64_UADDR32:
6862 case R_PPC64_UADDR64:
6863 case R_PPC64_TOC:
6864 break;
6865 }
6866
6867 if (local_syms != NULL)
6868 {
6869 unsigned long r_symndx;
6870 Elf_Internal_Sym *sym;
6871 bfd *ibfd = sec->owner;
6872
6873 r_symndx = ELF64_R_SYM (r_info);
6874 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6875 return FALSE;
6876 }
6877
6878 if ((info->shared
6879 && (must_be_dyn_reloc (info, r_type)
6880 || (h != NULL
6881 && (!info->symbolic
6882 || h->root.type == bfd_link_hash_defweak
6883 || !h->def_regular))))
6884 || (ELIMINATE_COPY_RELOCS
6885 && !info->shared
6886 && h != NULL
6887 && (h->root.type == bfd_link_hash_defweak
6888 || !h->def_regular)))
6889 ;
6890 else
6891 return TRUE;
6892
6893 if (h != NULL)
6894 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6895 else
6896 {
6897 if (sym_sec != NULL)
6898 {
6899 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6900 pp = (struct ppc_dyn_relocs **) vpp;
6901 }
6902 else
6903 {
6904 void *vpp = &elf_section_data (sec)->local_dynrel;
6905 pp = (struct ppc_dyn_relocs **) vpp;
6906 }
6907
6908 /* elf_gc_sweep may have already removed all dyn relocs associated
6909 with local syms for a given section. Don't report a dynreloc
6910 miscount. */
6911 if (*pp == NULL)
6912 return TRUE;
6913 }
6914
6915 while ((p = *pp) != NULL)
6916 {
6917 if (p->sec == sec)
6918 {
6919 if (!must_be_dyn_reloc (info, r_type))
6920 p->pc_count -= 1;
6921 p->count -= 1;
6922 if (p->count == 0)
6923 *pp = p->next;
6924 return TRUE;
6925 }
6926 pp = &p->next;
6927 }
6928
6929 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6930 sec->owner, sec);
6931 bfd_set_error (bfd_error_bad_value);
6932 return FALSE;
6933}
6934
6935/* Remove unused Official Procedure Descriptor entries. Currently we
6936 only remove those associated with functions in discarded link-once
6937 sections, or weakly defined functions that have been overridden. It
6938 would be possible to remove many more entries for statically linked
6939 applications. */
6940
6941bfd_boolean
6942ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6943{
6944 bfd *ibfd;
6945 bfd_boolean some_edited = FALSE;
6946 asection *need_pad = NULL;
6947
6948 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6949 {
6950 asection *sec;
6951 Elf_Internal_Rela *relstart, *rel, *relend;
6952 Elf_Internal_Shdr *symtab_hdr;
6953 Elf_Internal_Sym *local_syms;
6954 bfd_vma offset;
6955 struct _opd_sec_data *opd;
6956 bfd_boolean need_edit, add_aux_fields;
6957 bfd_size_type cnt_16b = 0;
6958
6959 if (!is_ppc64_elf (ibfd))
6960 continue;
6961
6962 sec = bfd_get_section_by_name (ibfd, ".opd");
6963 if (sec == NULL || sec->size == 0)
6964 continue;
6965
6966 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6967 continue;
6968
6969 if (sec->output_section == bfd_abs_section_ptr)
6970 continue;
6971
6972 /* Look through the section relocs. */
6973 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6974 continue;
6975
6976 local_syms = NULL;
6977 symtab_hdr = &elf_symtab_hdr (ibfd);
6978
6979 /* Read the relocations. */
6980 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6981 info->keep_memory);
6982 if (relstart == NULL)
6983 return FALSE;
6984
6985 /* First run through the relocs to check they are sane, and to
6986 determine whether we need to edit this opd section. */
6987 need_edit = FALSE;
6988 need_pad = sec;
6989 offset = 0;
6990 relend = relstart + sec->reloc_count;
6991 for (rel = relstart; rel < relend; )
6992 {
6993 enum elf_ppc64_reloc_type r_type;
6994 unsigned long r_symndx;
6995 asection *sym_sec;
6996 struct elf_link_hash_entry *h;
6997 Elf_Internal_Sym *sym;
6998
6999 /* .opd contains a regular array of 16 or 24 byte entries. We're
7000 only interested in the reloc pointing to a function entry
7001 point. */
7002 if (rel->r_offset != offset
7003 || rel + 1 >= relend
7004 || (rel + 1)->r_offset != offset + 8)
7005 {
7006 /* If someone messes with .opd alignment then after a
7007 "ld -r" we might have padding in the middle of .opd.
7008 Also, there's nothing to prevent someone putting
7009 something silly in .opd with the assembler. No .opd
7010 optimization for them! */
7011 broken_opd:
7012 (*_bfd_error_handler)
7013 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7014 need_edit = FALSE;
7015 break;
7016 }
7017
7018 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7019 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7020 {
7021 (*_bfd_error_handler)
7022 (_("%B: unexpected reloc type %u in .opd section"),
7023 ibfd, r_type);
7024 need_edit = FALSE;
7025 break;
7026 }
7027
7028 r_symndx = ELF64_R_SYM (rel->r_info);
7029 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7030 r_symndx, ibfd))
7031 goto error_ret;
7032
7033 if (sym_sec == NULL || sym_sec->owner == NULL)
7034 {
7035 const char *sym_name;
7036 if (h != NULL)
7037 sym_name = h->root.root.string;
7038 else
7039 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7040 sym_sec);
7041
7042 (*_bfd_error_handler)
7043 (_("%B: undefined sym `%s' in .opd section"),
7044 ibfd, sym_name);
7045 need_edit = FALSE;
7046 break;
7047 }
7048
7049 /* opd entries are always for functions defined in the
7050 current input bfd. If the symbol isn't defined in the
7051 input bfd, then we won't be using the function in this
7052 bfd; It must be defined in a linkonce section in another
7053 bfd, or is weak. It's also possible that we are
7054 discarding the function due to a linker script /DISCARD/,
7055 which we test for via the output_section. */
7056 if (sym_sec->owner != ibfd
7057 || sym_sec->output_section == bfd_abs_section_ptr)
7058 need_edit = TRUE;
7059
7060 rel += 2;
7061 if (rel == relend
7062 || (rel + 1 == relend && rel->r_offset == offset + 16))
7063 {
7064 if (sec->size == offset + 24)
7065 {
7066 need_pad = NULL;
7067 break;
7068 }
7069 if (rel == relend && sec->size == offset + 16)
7070 {
7071 cnt_16b++;
7072 break;
7073 }
7074 goto broken_opd;
7075 }
7076
7077 if (rel->r_offset == offset + 24)
7078 offset += 24;
7079 else if (rel->r_offset != offset + 16)
7080 goto broken_opd;
7081 else if (rel + 1 < relend
7082 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7083 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7084 {
7085 offset += 16;
7086 cnt_16b++;
7087 }
7088 else if (rel + 2 < relend
7089 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7090 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7091 {
7092 offset += 24;
7093 rel += 1;
7094 }
7095 else
7096 goto broken_opd;
7097 }
7098
7099 add_aux_fields = non_overlapping && cnt_16b > 0;
7100
7101 if (need_edit || add_aux_fields)
7102 {
7103 Elf_Internal_Rela *write_rel;
7104 Elf_Internal_Shdr *rel_hdr;
7105 bfd_byte *rptr, *wptr;
7106 bfd_byte *new_contents;
7107 bfd_boolean skip;
7108 long opd_ent_size;
7109 bfd_size_type amt;
7110
7111 new_contents = NULL;
7112 amt = sec->size * sizeof (long) / 8;
7113 opd = &ppc64_elf_section_data (sec)->u.opd;
7114 opd->adjust = bfd_zalloc (sec->owner, amt);
7115 if (opd->adjust == NULL)
7116 return FALSE;
7117 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7118
7119 /* This seems a waste of time as input .opd sections are all
7120 zeros as generated by gcc, but I suppose there's no reason
7121 this will always be so. We might start putting something in
7122 the third word of .opd entries. */
7123 if ((sec->flags & SEC_IN_MEMORY) == 0)
7124 {
7125 bfd_byte *loc;
7126 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7127 {
7128 if (loc != NULL)
7129 free (loc);
7130 error_ret:
7131 if (local_syms != NULL
7132 && symtab_hdr->contents != (unsigned char *) local_syms)
7133 free (local_syms);
7134 if (elf_section_data (sec)->relocs != relstart)
7135 free (relstart);
7136 return FALSE;
7137 }
7138 sec->contents = loc;
7139 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7140 }
7141
7142 elf_section_data (sec)->relocs = relstart;
7143
7144 new_contents = sec->contents;
7145 if (add_aux_fields)
7146 {
7147 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7148 if (new_contents == NULL)
7149 return FALSE;
7150 need_pad = FALSE;
7151 }
7152 wptr = new_contents;
7153 rptr = sec->contents;
7154
7155 write_rel = relstart;
7156 skip = FALSE;
7157 offset = 0;
7158 opd_ent_size = 0;
7159 for (rel = relstart; rel < relend; rel++)
7160 {
7161 unsigned long r_symndx;
7162 asection *sym_sec;
7163 struct elf_link_hash_entry *h;
7164 Elf_Internal_Sym *sym;
7165
7166 r_symndx = ELF64_R_SYM (rel->r_info);
7167 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7168 r_symndx, ibfd))
7169 goto error_ret;
7170
7171 if (rel->r_offset == offset)
7172 {
7173 struct ppc_link_hash_entry *fdh = NULL;
7174
7175 /* See if the .opd entry is full 24 byte or
7176 16 byte (with fd_aux entry overlapped with next
7177 fd_func). */
7178 opd_ent_size = 24;
7179 if ((rel + 2 == relend && sec->size == offset + 16)
7180 || (rel + 3 < relend
7181 && rel[2].r_offset == offset + 16
7182 && rel[3].r_offset == offset + 24
7183 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7184 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7185 opd_ent_size = 16;
7186
7187 if (h != NULL
7188 && h->root.root.string[0] == '.')
7189 {
7190 struct ppc_link_hash_table *htab;
7191
7192 htab = ppc_hash_table (info);
7193 if (htab != NULL)
7194 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7195 htab);
7196 if (fdh != NULL
7197 && fdh->elf.root.type != bfd_link_hash_defined
7198 && fdh->elf.root.type != bfd_link_hash_defweak)
7199 fdh = NULL;
7200 }
7201
7202 skip = (sym_sec->owner != ibfd
7203 || sym_sec->output_section == bfd_abs_section_ptr);
7204 if (skip)
7205 {
7206 if (fdh != NULL && sym_sec->owner == ibfd)
7207 {
7208 /* Arrange for the function descriptor sym
7209 to be dropped. */
7210 fdh->elf.root.u.def.value = 0;
7211 fdh->elf.root.u.def.section = sym_sec;
7212 }
7213 opd->adjust[rel->r_offset / 8] = -1;
7214 }
7215 else
7216 {
7217 /* We'll be keeping this opd entry. */
7218
7219 if (fdh != NULL)
7220 {
7221 /* Redefine the function descriptor symbol to
7222 this location in the opd section. It is
7223 necessary to update the value here rather
7224 than using an array of adjustments as we do
7225 for local symbols, because various places
7226 in the generic ELF code use the value
7227 stored in u.def.value. */
7228 fdh->elf.root.u.def.value = wptr - new_contents;
7229 fdh->adjust_done = 1;
7230 }
7231
7232 /* Local syms are a bit tricky. We could
7233 tweak them as they can be cached, but
7234 we'd need to look through the local syms
7235 for the function descriptor sym which we
7236 don't have at the moment. So keep an
7237 array of adjustments. */
7238 opd->adjust[rel->r_offset / 8]
7239 = (wptr - new_contents) - (rptr - sec->contents);
7240
7241 if (wptr != rptr)
7242 memcpy (wptr, rptr, opd_ent_size);
7243 wptr += opd_ent_size;
7244 if (add_aux_fields && opd_ent_size == 16)
7245 {
7246 memset (wptr, '\0', 8);
7247 wptr += 8;
7248 }
7249 }
7250 rptr += opd_ent_size;
7251 offset += opd_ent_size;
7252 }
7253
7254 if (skip)
7255 {
7256 if (!NO_OPD_RELOCS
7257 && !info->relocatable
7258 && !dec_dynrel_count (rel->r_info, sec, info,
7259 NULL, h, sym_sec))
7260 goto error_ret;
7261 }
7262 else
7263 {
7264 /* We need to adjust any reloc offsets to point to the
7265 new opd entries. While we're at it, we may as well
7266 remove redundant relocs. */
7267 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7268 if (write_rel != rel)
7269 memcpy (write_rel, rel, sizeof (*rel));
7270 ++write_rel;
7271 }
7272 }
7273
7274 sec->size = wptr - new_contents;
7275 sec->reloc_count = write_rel - relstart;
7276 if (add_aux_fields)
7277 {
7278 free (sec->contents);
7279 sec->contents = new_contents;
7280 }
7281
7282 /* Fudge the header size too, as this is used later in
7283 elf_bfd_final_link if we are emitting relocs. */
7284 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7285 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7286 some_edited = TRUE;
7287 }
7288 else if (elf_section_data (sec)->relocs != relstart)
7289 free (relstart);
7290
7291 if (local_syms != NULL
7292 && symtab_hdr->contents != (unsigned char *) local_syms)
7293 {
7294 if (!info->keep_memory)
7295 free (local_syms);
7296 else
7297 symtab_hdr->contents = (unsigned char *) local_syms;
7298 }
7299 }
7300
7301 if (some_edited)
7302 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7303
7304 /* If we are doing a final link and the last .opd entry is just 16 byte
7305 long, add a 8 byte padding after it. */
7306 if (need_pad != NULL && !info->relocatable)
7307 {
7308 bfd_byte *p;
7309
7310 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7311 {
7312 BFD_ASSERT (need_pad->size > 0);
7313
7314 p = bfd_malloc (need_pad->size + 8);
7315 if (p == NULL)
7316 return FALSE;
7317
7318 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7319 p, 0, need_pad->size))
7320 return FALSE;
7321
7322 need_pad->contents = p;
7323 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7324 }
7325 else
7326 {
7327 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7328 if (p == NULL)
7329 return FALSE;
7330
7331 need_pad->contents = p;
7332 }
7333
7334 memset (need_pad->contents + need_pad->size, 0, 8);
7335 need_pad->size += 8;
7336 }
7337
7338 return TRUE;
7339}
7340
7341/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7342
7343asection *
7344ppc64_elf_tls_setup (struct bfd_link_info *info,
7345 int no_tls_get_addr_opt,
7346 int *no_multi_toc)
7347{
7348 struct ppc_link_hash_table *htab;
7349
7350 htab = ppc_hash_table (info);
7351 if (htab == NULL)
7352 return NULL;
7353
7354 if (*no_multi_toc)
7355 htab->do_multi_toc = 0;
7356 else if (!htab->do_multi_toc)
7357 *no_multi_toc = 1;
7358
7359 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7360 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7361 FALSE, FALSE, TRUE));
7362 /* Move dynamic linking info to the function descriptor sym. */
7363 if (htab->tls_get_addr != NULL)
7364 func_desc_adjust (&htab->tls_get_addr->elf, info);
7365 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7366 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7367 FALSE, FALSE, TRUE));
7368 if (!no_tls_get_addr_opt)
7369 {
7370 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7371
7372 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7373 FALSE, FALSE, TRUE);
7374 if (opt != NULL)
7375 func_desc_adjust (opt, info);
7376 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7377 FALSE, FALSE, TRUE);
7378 if (opt_fd != NULL
7379 && (opt_fd->root.type == bfd_link_hash_defined
7380 || opt_fd->root.type == bfd_link_hash_defweak))
7381 {
7382 /* If glibc supports an optimized __tls_get_addr call stub,
7383 signalled by the presence of __tls_get_addr_opt, and we'll
7384 be calling __tls_get_addr via a plt call stub, then
7385 make __tls_get_addr point to __tls_get_addr_opt. */
7386 tga_fd = &htab->tls_get_addr_fd->elf;
7387 if (htab->elf.dynamic_sections_created
7388 && tga_fd != NULL
7389 && (tga_fd->type == STT_FUNC
7390 || tga_fd->needs_plt)
7391 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7392 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7393 && tga_fd->root.type == bfd_link_hash_undefweak)))
7394 {
7395 struct plt_entry *ent;
7396
7397 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7398 if (ent->plt.refcount > 0)
7399 break;
7400 if (ent != NULL)
7401 {
7402 tga_fd->root.type = bfd_link_hash_indirect;
7403 tga_fd->root.u.i.link = &opt_fd->root;
7404 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7405 if (opt_fd->dynindx != -1)
7406 {
7407 /* Use __tls_get_addr_opt in dynamic relocations. */
7408 opt_fd->dynindx = -1;
7409 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7410 opt_fd->dynstr_index);
7411 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7412 return NULL;
7413 }
7414 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7415 tga = &htab->tls_get_addr->elf;
7416 if (opt != NULL && tga != NULL)
7417 {
7418 tga->root.type = bfd_link_hash_indirect;
7419 tga->root.u.i.link = &opt->root;
7420 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7421 _bfd_elf_link_hash_hide_symbol (info, opt,
7422 tga->forced_local);
7423 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7424 }
7425 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7426 htab->tls_get_addr_fd->is_func_descriptor = 1;
7427 if (htab->tls_get_addr != NULL)
7428 {
7429 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7430 htab->tls_get_addr->is_func = 1;
7431 }
7432 }
7433 }
7434 }
7435 else
7436 no_tls_get_addr_opt = TRUE;
7437 }
7438 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7439 return _bfd_elf_tls_setup (info->output_bfd, info);
7440}
7441
7442/* Return TRUE iff REL is a branch reloc with a global symbol matching
7443 HASH1 or HASH2. */
7444
7445static bfd_boolean
7446branch_reloc_hash_match (const bfd *ibfd,
7447 const Elf_Internal_Rela *rel,
7448 const struct ppc_link_hash_entry *hash1,
7449 const struct ppc_link_hash_entry *hash2)
7450{
7451 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7452 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7453 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7454
7455 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7456 {
7457 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7458 struct elf_link_hash_entry *h;
7459
7460 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7461 h = elf_follow_link (h);
7462 if (h == &hash1->elf || h == &hash2->elf)
7463 return TRUE;
7464 }
7465 return FALSE;
7466}
7467
7468/* Run through all the TLS relocs looking for optimization
7469 opportunities. The linker has been hacked (see ppc64elf.em) to do
7470 a preliminary section layout so that we know the TLS segment
7471 offsets. We can't optimize earlier because some optimizations need
7472 to know the tp offset, and we need to optimize before allocating
7473 dynamic relocations. */
7474
7475bfd_boolean
7476ppc64_elf_tls_optimize (struct bfd_link_info *info)
7477{
7478 bfd *ibfd;
7479 asection *sec;
7480 struct ppc_link_hash_table *htab;
7481 unsigned char *toc_ref;
7482 int pass;
7483
7484 if (info->relocatable || !info->executable)
7485 return TRUE;
7486
7487 htab = ppc_hash_table (info);
7488 if (htab == NULL)
7489 return FALSE;
7490
7491 /* Make two passes over the relocs. On the first pass, mark toc
7492 entries involved with tls relocs, and check that tls relocs
7493 involved in setting up a tls_get_addr call are indeed followed by
7494 such a call. If they are not, we can't do any tls optimization.
7495 On the second pass twiddle tls_mask flags to notify
7496 relocate_section that optimization can be done, and adjust got
7497 and plt refcounts. */
7498 toc_ref = NULL;
7499 for (pass = 0; pass < 2; ++pass)
7500 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7501 {
7502 Elf_Internal_Sym *locsyms = NULL;
7503 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7504
7505 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7506 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7507 {
7508 Elf_Internal_Rela *relstart, *rel, *relend;
7509 bfd_boolean found_tls_get_addr_arg = 0;
7510
7511 /* Read the relocations. */
7512 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7513 info->keep_memory);
7514 if (relstart == NULL)
7515 return FALSE;
7516
7517 relend = relstart + sec->reloc_count;
7518 for (rel = relstart; rel < relend; rel++)
7519 {
7520 enum elf_ppc64_reloc_type r_type;
7521 unsigned long r_symndx;
7522 struct elf_link_hash_entry *h;
7523 Elf_Internal_Sym *sym;
7524 asection *sym_sec;
7525 unsigned char *tls_mask;
7526 unsigned char tls_set, tls_clear, tls_type = 0;
7527 bfd_vma value;
7528 bfd_boolean ok_tprel, is_local;
7529 long toc_ref_index = 0;
7530 int expecting_tls_get_addr = 0;
7531 bfd_boolean ret = FALSE;
7532
7533 r_symndx = ELF64_R_SYM (rel->r_info);
7534 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7535 r_symndx, ibfd))
7536 {
7537 err_free_rel:
7538 if (elf_section_data (sec)->relocs != relstart)
7539 free (relstart);
7540 if (toc_ref != NULL)
7541 free (toc_ref);
7542 if (locsyms != NULL
7543 && (elf_symtab_hdr (ibfd).contents
7544 != (unsigned char *) locsyms))
7545 free (locsyms);
7546 return ret;
7547 }
7548
7549 if (h != NULL)
7550 {
7551 if (h->root.type == bfd_link_hash_defined
7552 || h->root.type == bfd_link_hash_defweak)
7553 value = h->root.u.def.value;
7554 else if (h->root.type == bfd_link_hash_undefweak)
7555 value = 0;
7556 else
7557 {
7558 found_tls_get_addr_arg = 0;
7559 continue;
7560 }
7561 }
7562 else
7563 /* Symbols referenced by TLS relocs must be of type
7564 STT_TLS. So no need for .opd local sym adjust. */
7565 value = sym->st_value;
7566
7567 ok_tprel = FALSE;
7568 is_local = FALSE;
7569 if (h == NULL
7570 || !h->def_dynamic)
7571 {
7572 is_local = TRUE;
7573 if (h != NULL
7574 && h->root.type == bfd_link_hash_undefweak)
7575 ok_tprel = TRUE;
7576 else
7577 {
7578 value += sym_sec->output_offset;
7579 value += sym_sec->output_section->vma;
7580 value -= htab->elf.tls_sec->vma;
7581 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7582 < (bfd_vma) 1 << 32);
7583 }
7584 }
7585
7586 r_type = ELF64_R_TYPE (rel->r_info);
7587 /* If this section has old-style __tls_get_addr calls
7588 without marker relocs, then check that each
7589 __tls_get_addr call reloc is preceded by a reloc
7590 that conceivably belongs to the __tls_get_addr arg
7591 setup insn. If we don't find matching arg setup
7592 relocs, don't do any tls optimization. */
7593 if (pass == 0
7594 && sec->has_tls_get_addr_call
7595 && h != NULL
7596 && (h == &htab->tls_get_addr->elf
7597 || h == &htab->tls_get_addr_fd->elf)
7598 && !found_tls_get_addr_arg
7599 && is_branch_reloc (r_type))
7600 {
7601 info->callbacks->minfo (_("%C __tls_get_addr lost arg, "
7602 "TLS optimization disabled\n"),
7603 ibfd, sec, rel->r_offset);
7604 ret = TRUE;
7605 goto err_free_rel;
7606 }
7607
7608 found_tls_get_addr_arg = 0;
7609 switch (r_type)
7610 {
7611 case R_PPC64_GOT_TLSLD16:
7612 case R_PPC64_GOT_TLSLD16_LO:
7613 expecting_tls_get_addr = 1;
7614 found_tls_get_addr_arg = 1;
7615 /* Fall thru */
7616
7617 case R_PPC64_GOT_TLSLD16_HI:
7618 case R_PPC64_GOT_TLSLD16_HA:
7619 /* These relocs should never be against a symbol
7620 defined in a shared lib. Leave them alone if
7621 that turns out to be the case. */
7622 if (!is_local)
7623 continue;
7624
7625 /* LD -> LE */
7626 tls_set = 0;
7627 tls_clear = TLS_LD;
7628 tls_type = TLS_TLS | TLS_LD;
7629 break;
7630
7631 case R_PPC64_GOT_TLSGD16:
7632 case R_PPC64_GOT_TLSGD16_LO:
7633 expecting_tls_get_addr = 1;
7634 found_tls_get_addr_arg = 1;
7635 /* Fall thru */
7636
7637 case R_PPC64_GOT_TLSGD16_HI:
7638 case R_PPC64_GOT_TLSGD16_HA:
7639 if (ok_tprel)
7640 /* GD -> LE */
7641 tls_set = 0;
7642 else
7643 /* GD -> IE */
7644 tls_set = TLS_TLS | TLS_TPRELGD;
7645 tls_clear = TLS_GD;
7646 tls_type = TLS_TLS | TLS_GD;
7647 break;
7648
7649 case R_PPC64_GOT_TPREL16_DS:
7650 case R_PPC64_GOT_TPREL16_LO_DS:
7651 case R_PPC64_GOT_TPREL16_HI:
7652 case R_PPC64_GOT_TPREL16_HA:
7653 if (ok_tprel)
7654 {
7655 /* IE -> LE */
7656 tls_set = 0;
7657 tls_clear = TLS_TPREL;
7658 tls_type = TLS_TLS | TLS_TPREL;
7659 break;
7660 }
7661 continue;
7662
7663 case R_PPC64_TLSGD:
7664 case R_PPC64_TLSLD:
7665 found_tls_get_addr_arg = 1;
7666 /* Fall thru */
7667
7668 case R_PPC64_TLS:
7669 case R_PPC64_TOC16:
7670 case R_PPC64_TOC16_LO:
7671 if (sym_sec == NULL || sym_sec != toc)
7672 continue;
7673
7674 /* Mark this toc entry as referenced by a TLS
7675 code sequence. We can do that now in the
7676 case of R_PPC64_TLS, and after checking for
7677 tls_get_addr for the TOC16 relocs. */
7678 if (toc_ref == NULL)
7679 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7680 if (toc_ref == NULL)
7681 goto err_free_rel;
7682
7683 if (h != NULL)
7684 value = h->root.u.def.value;
7685 else
7686 value = sym->st_value;
7687 value += rel->r_addend;
7688 BFD_ASSERT (value < toc->size && value % 8 == 0);
7689 toc_ref_index = (value + toc->output_offset) / 8;
7690 if (r_type == R_PPC64_TLS
7691 || r_type == R_PPC64_TLSGD
7692 || r_type == R_PPC64_TLSLD)
7693 {
7694 toc_ref[toc_ref_index] = 1;
7695 continue;
7696 }
7697
7698 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7699 continue;
7700
7701 tls_set = 0;
7702 tls_clear = 0;
7703 expecting_tls_get_addr = 2;
7704 break;
7705
7706 case R_PPC64_TPREL64:
7707 if (pass == 0
7708 || sec != toc
7709 || toc_ref == NULL
7710 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7711 continue;
7712 if (ok_tprel)
7713 {
7714 /* IE -> LE */
7715 tls_set = TLS_EXPLICIT;
7716 tls_clear = TLS_TPREL;
7717 break;
7718 }
7719 continue;
7720
7721 case R_PPC64_DTPMOD64:
7722 if (pass == 0
7723 || sec != toc
7724 || toc_ref == NULL
7725 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7726 continue;
7727 if (rel + 1 < relend
7728 && (rel[1].r_info
7729 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7730 && rel[1].r_offset == rel->r_offset + 8)
7731 {
7732 if (ok_tprel)
7733 /* GD -> LE */
7734 tls_set = TLS_EXPLICIT | TLS_GD;
7735 else
7736 /* GD -> IE */
7737 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7738 tls_clear = TLS_GD;
7739 }
7740 else
7741 {
7742 if (!is_local)
7743 continue;
7744
7745 /* LD -> LE */
7746 tls_set = TLS_EXPLICIT;
7747 tls_clear = TLS_LD;
7748 }
7749 break;
7750
7751 default:
7752 continue;
7753 }
7754
7755 if (pass == 0)
7756 {
7757 if (!expecting_tls_get_addr
7758 || !sec->has_tls_get_addr_call)
7759 continue;
7760
7761 if (rel + 1 < relend
7762 && branch_reloc_hash_match (ibfd, rel + 1,
7763 htab->tls_get_addr,
7764 htab->tls_get_addr_fd))
7765 {
7766 if (expecting_tls_get_addr == 2)
7767 {
7768 /* Check for toc tls entries. */
7769 unsigned char *toc_tls;
7770 int retval;
7771
7772 retval = get_tls_mask (&toc_tls, NULL, NULL,
7773 &locsyms,
7774 rel, ibfd);
7775 if (retval == 0)
7776 goto err_free_rel;
7777 if (toc_tls != NULL)
7778 {
7779 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7780 found_tls_get_addr_arg = 1;
7781 if (retval > 1)
7782 toc_ref[toc_ref_index] = 1;
7783 }
7784 }
7785 continue;
7786 }
7787
7788 if (expecting_tls_get_addr != 1)
7789 continue;
7790
7791 /* Uh oh, we didn't find the expected call. We
7792 could just mark this symbol to exclude it
7793 from tls optimization but it's safer to skip
7794 the entire optimization. */
7795 info->callbacks->minfo (_("%C arg lost __tls_get_addr, "
7796 "TLS optimization disabled\n"),
7797 ibfd, sec, rel->r_offset);
7798 ret = TRUE;
7799 goto err_free_rel;
7800 }
7801
7802 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7803 {
7804 struct plt_entry *ent;
7805 for (ent = htab->tls_get_addr->elf.plt.plist;
7806 ent != NULL;
7807 ent = ent->next)
7808 if (ent->addend == 0)
7809 {
7810 if (ent->plt.refcount > 0)
7811 {
7812 ent->plt.refcount -= 1;
7813 expecting_tls_get_addr = 0;
7814 }
7815 break;
7816 }
7817 }
7818
7819 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7820 {
7821 struct plt_entry *ent;
7822 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7823 ent != NULL;
7824 ent = ent->next)
7825 if (ent->addend == 0)
7826 {
7827 if (ent->plt.refcount > 0)
7828 ent->plt.refcount -= 1;
7829 break;
7830 }
7831 }
7832
7833 if (tls_clear == 0)
7834 continue;
7835
7836 if ((tls_set & TLS_EXPLICIT) == 0)
7837 {
7838 struct got_entry *ent;
7839
7840 /* Adjust got entry for this reloc. */
7841 if (h != NULL)
7842 ent = h->got.glist;
7843 else
7844 ent = elf_local_got_ents (ibfd)[r_symndx];
7845
7846 for (; ent != NULL; ent = ent->next)
7847 if (ent->addend == rel->r_addend
7848 && ent->owner == ibfd
7849 && ent->tls_type == tls_type)
7850 break;
7851 if (ent == NULL)
7852 abort ();
7853
7854 if (tls_set == 0)
7855 {
7856 /* We managed to get rid of a got entry. */
7857 if (ent->got.refcount > 0)
7858 ent->got.refcount -= 1;
7859 }
7860 }
7861 else
7862 {
7863 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7864 we'll lose one or two dyn relocs. */
7865 if (!dec_dynrel_count (rel->r_info, sec, info,
7866 NULL, h, sym_sec))
7867 return FALSE;
7868
7869 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7870 {
7871 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7872 NULL, h, sym_sec))
7873 return FALSE;
7874 }
7875 }
7876
7877 *tls_mask |= tls_set;
7878 *tls_mask &= ~tls_clear;
7879 }
7880
7881 if (elf_section_data (sec)->relocs != relstart)
7882 free (relstart);
7883 }
7884
7885 if (locsyms != NULL
7886 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7887 {
7888 if (!info->keep_memory)
7889 free (locsyms);
7890 else
7891 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7892 }
7893 }
7894
7895 if (toc_ref != NULL)
7896 free (toc_ref);
7897 return TRUE;
7898}
7899
7900/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7901 the values of any global symbols in a toc section that has been
7902 edited. Globals in toc sections should be a rarity, so this function
7903 sets a flag if any are found in toc sections other than the one just
7904 edited, so that futher hash table traversals can be avoided. */
7905
7906struct adjust_toc_info
7907{
7908 asection *toc;
7909 unsigned long *skip;
7910 bfd_boolean global_toc_syms;
7911};
7912
7913enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7914
7915static bfd_boolean
7916adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7917{
7918 struct ppc_link_hash_entry *eh;
7919 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7920 unsigned long i;
7921
7922 if (h->root.type == bfd_link_hash_indirect)
7923 return TRUE;
7924
7925 if (h->root.type == bfd_link_hash_warning)
7926 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7927
7928 if (h->root.type != bfd_link_hash_defined
7929 && h->root.type != bfd_link_hash_defweak)
7930 return TRUE;
7931
7932 eh = (struct ppc_link_hash_entry *) h;
7933 if (eh->adjust_done)
7934 return TRUE;
7935
7936 if (eh->elf.root.u.def.section == toc_inf->toc)
7937 {
7938 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7939 i = toc_inf->toc->rawsize >> 3;
7940 else
7941 i = eh->elf.root.u.def.value >> 3;
7942
7943 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7944 {
7945 (*_bfd_error_handler)
7946 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7947 do
7948 ++i;
7949 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7950 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7951 }
7952
7953 eh->elf.root.u.def.value -= toc_inf->skip[i];
7954 eh->adjust_done = 1;
7955 }
7956 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7957 toc_inf->global_toc_syms = TRUE;
7958
7959 return TRUE;
7960}
7961
7962/* Examine all relocs referencing .toc sections in order to remove
7963 unused .toc entries. */
7964
7965bfd_boolean
7966ppc64_elf_edit_toc (struct bfd_link_info *info)
7967{
7968 bfd *ibfd;
7969 struct adjust_toc_info toc_inf;
7970 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7971
7972 htab->do_toc_opt = 1;
7973 toc_inf.global_toc_syms = TRUE;
7974 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7975 {
7976 asection *toc, *sec;
7977 Elf_Internal_Shdr *symtab_hdr;
7978 Elf_Internal_Sym *local_syms;
7979 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7980 unsigned long *skip, *drop;
7981 unsigned char *used;
7982 unsigned char *keep, last, some_unused;
7983
7984 if (!is_ppc64_elf (ibfd))
7985 continue;
7986
7987 toc = bfd_get_section_by_name (ibfd, ".toc");
7988 if (toc == NULL
7989 || toc->size == 0
7990 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7991 || elf_discarded_section (toc))
7992 continue;
7993
7994 toc_relocs = NULL;
7995 local_syms = NULL;
7996 symtab_hdr = &elf_symtab_hdr (ibfd);
7997
7998 /* Look at sections dropped from the final link. */
7999 skip = NULL;
8000 relstart = NULL;
8001 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8002 {
8003 if (sec->reloc_count == 0
8004 || !elf_discarded_section (sec)
8005 || get_opd_info (sec)
8006 || (sec->flags & SEC_ALLOC) == 0
8007 || (sec->flags & SEC_DEBUGGING) != 0)
8008 continue;
8009
8010 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8011 if (relstart == NULL)
8012 goto error_ret;
8013
8014 /* Run through the relocs to see which toc entries might be
8015 unused. */
8016 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8017 {
8018 enum elf_ppc64_reloc_type r_type;
8019 unsigned long r_symndx;
8020 asection *sym_sec;
8021 struct elf_link_hash_entry *h;
8022 Elf_Internal_Sym *sym;
8023 bfd_vma val;
8024
8025 r_type = ELF64_R_TYPE (rel->r_info);
8026 switch (r_type)
8027 {
8028 default:
8029 continue;
8030
8031 case R_PPC64_TOC16:
8032 case R_PPC64_TOC16_LO:
8033 case R_PPC64_TOC16_HI:
8034 case R_PPC64_TOC16_HA:
8035 case R_PPC64_TOC16_DS:
8036 case R_PPC64_TOC16_LO_DS:
8037 break;
8038 }
8039
8040 r_symndx = ELF64_R_SYM (rel->r_info);
8041 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8042 r_symndx, ibfd))
8043 goto error_ret;
8044
8045 if (sym_sec != toc)
8046 continue;
8047
8048 if (h != NULL)
8049 val = h->root.u.def.value;
8050 else
8051 val = sym->st_value;
8052 val += rel->r_addend;
8053
8054 if (val >= toc->size)
8055 continue;
8056
8057 /* Anything in the toc ought to be aligned to 8 bytes.
8058 If not, don't mark as unused. */
8059 if (val & 7)
8060 continue;
8061
8062 if (skip == NULL)
8063 {
8064 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8065 if (skip == NULL)
8066 goto error_ret;
8067 }
8068
8069 skip[val >> 3] = ref_from_discarded;
8070 }
8071
8072 if (elf_section_data (sec)->relocs != relstart)
8073 free (relstart);
8074 }
8075
8076 /* For largetoc loads of address constants, we can convert
8077 . addis rx,2,addr@got@ha
8078 . ld ry,addr@got@l(rx)
8079 to
8080 . addis rx,2,addr@toc@ha
8081 . addi ry,rx,addr@toc@l
8082 when addr is within 2G of the toc pointer. This then means
8083 that the word storing "addr" in the toc is no longer needed. */
8084
8085 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8086 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8087 && toc->reloc_count != 0)
8088 {
8089 /* Read toc relocs. */
8090 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8091 info->keep_memory);
8092 if (toc_relocs == NULL)
8093 goto error_ret;
8094
8095 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8096 {
8097 enum elf_ppc64_reloc_type r_type;
8098 unsigned long r_symndx;
8099 asection *sym_sec;
8100 struct elf_link_hash_entry *h;
8101 Elf_Internal_Sym *sym;
8102 bfd_vma val, addr;
8103
8104 r_type = ELF64_R_TYPE (rel->r_info);
8105 if (r_type != R_PPC64_ADDR64)
8106 continue;
8107
8108 r_symndx = ELF64_R_SYM (rel->r_info);
8109 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8110 r_symndx, ibfd))
8111 goto error_ret;
8112
8113 if (sym_sec == NULL
8114 || elf_discarded_section (sym_sec))
8115 continue;
8116
8117 if (!SYMBOL_CALLS_LOCAL (info, h))
8118 continue;
8119
8120 if (h != NULL)
8121 {
8122 if (h->type == STT_GNU_IFUNC)
8123 continue;
8124 val = h->root.u.def.value;
8125 }
8126 else
8127 {
8128 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8129 continue;
8130 val = sym->st_value;
8131 }
8132 val += rel->r_addend;
8133 val += sym_sec->output_section->vma + sym_sec->output_offset;
8134
8135 /* We don't yet know the exact toc pointer value, but we
8136 know it will be somewhere in the toc section. Don't
8137 optimize if the difference from any possible toc
8138 pointer is outside [ff..f80008000, 7fff7fff]. */
8139 addr = toc->output_section->vma + TOC_BASE_OFF;
8140 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8141 continue;
8142
8143 addr = toc->output_section->vma + toc->output_section->rawsize;
8144 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8145 continue;
8146
8147 if (skip == NULL)
8148 {
8149 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8150 if (skip == NULL)
8151 goto error_ret;
8152 }
8153
8154 skip[rel->r_offset >> 3]
8155 |= can_optimize | ((rel - toc_relocs) << 2);
8156 }
8157 }
8158
8159 if (skip == NULL)
8160 continue;
8161
8162 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8163 if (used == NULL)
8164 {
8165 error_ret:
8166 if (local_syms != NULL
8167 && symtab_hdr->contents != (unsigned char *) local_syms)
8168 free (local_syms);
8169 if (sec != NULL
8170 && relstart != NULL
8171 && elf_section_data (sec)->relocs != relstart)
8172 free (relstart);
8173 if (toc_relocs != NULL
8174 && elf_section_data (toc)->relocs != toc_relocs)
8175 free (toc_relocs);
8176 if (skip != NULL)
8177 free (skip);
8178 return FALSE;
8179 }
8180
8181 /* Now check all kept sections that might reference the toc.
8182 Check the toc itself last. */
8183 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8184 : ibfd->sections);
8185 sec != NULL;
8186 sec = (sec == toc ? NULL
8187 : sec->next == NULL ? toc
8188 : sec->next == toc && toc->next ? toc->next
8189 : sec->next))
8190 {
8191 int repeat;
8192
8193 if (sec->reloc_count == 0
8194 || elf_discarded_section (sec)
8195 || get_opd_info (sec)
8196 || (sec->flags & SEC_ALLOC) == 0
8197 || (sec->flags & SEC_DEBUGGING) != 0)
8198 continue;
8199
8200 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8201 info->keep_memory);
8202 if (relstart == NULL)
8203 goto error_ret;
8204
8205 /* Mark toc entries referenced as used. */
8206 repeat = 0;
8207 do
8208 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8209 {
8210 enum elf_ppc64_reloc_type r_type;
8211 unsigned long r_symndx;
8212 asection *sym_sec;
8213 struct elf_link_hash_entry *h;
8214 Elf_Internal_Sym *sym;
8215 bfd_vma val;
8216
8217 r_type = ELF64_R_TYPE (rel->r_info);
8218 switch (r_type)
8219 {
8220 case R_PPC64_TOC16:
8221 case R_PPC64_TOC16_LO:
8222 case R_PPC64_TOC16_HI:
8223 case R_PPC64_TOC16_HA:
8224 case R_PPC64_TOC16_DS:
8225 case R_PPC64_TOC16_LO_DS:
8226 /* In case we're taking addresses of toc entries. */
8227 case R_PPC64_ADDR64:
8228 break;
8229
8230 default:
8231 continue;
8232 }
8233
8234 r_symndx = ELF64_R_SYM (rel->r_info);
8235 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8236 r_symndx, ibfd))
8237 {
8238 free (used);
8239 goto error_ret;
8240 }
8241
8242 if (sym_sec != toc)
8243 continue;
8244
8245 if (h != NULL)
8246 val = h->root.u.def.value;
8247 else
8248 val = sym->st_value;
8249 val += rel->r_addend;
8250
8251 if (val >= toc->size)
8252 continue;
8253
8254 if ((skip[val >> 3] & can_optimize) != 0)
8255 {
8256 bfd_vma off;
8257 unsigned char opc;
8258
8259 switch (r_type)
8260 {
8261 case R_PPC64_TOC16_HA:
8262 break;
8263
8264 case R_PPC64_TOC16_LO_DS:
8265 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8266 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8267 return FALSE;
8268 if ((opc & (0x3f << 2)) == (58u << 2))
8269 break;
8270 /* Fall thru */
8271
8272 default:
8273 /* Wrong sort of reloc, or not a ld. We may
8274 as well clear ref_from_discarded too. */
8275 skip[val >> 3] = 0;
8276 }
8277 }
8278
8279 /* For the toc section, we only mark as used if
8280 this entry itself isn't unused. */
8281 if (sec == toc
8282 && !used[val >> 3]
8283 && (used[rel->r_offset >> 3]
8284 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8285 /* Do all the relocs again, to catch reference
8286 chains. */
8287 repeat = 1;
8288
8289 used[val >> 3] = 1;
8290 }
8291 while (repeat);
8292
8293 if (elf_section_data (sec)->relocs != relstart)
8294 free (relstart);
8295 }
8296
8297 /* Merge the used and skip arrays. Assume that TOC
8298 doublewords not appearing as either used or unused belong
8299 to to an entry more than one doubleword in size. */
8300 for (drop = skip, keep = used, last = 0, some_unused = 0;
8301 drop < skip + (toc->size + 7) / 8;
8302 ++drop, ++keep)
8303 {
8304 if (*keep)
8305 {
8306 *drop &= ~ref_from_discarded;
8307 if ((*drop & can_optimize) != 0)
8308 some_unused = 1;
8309 last = 0;
8310 }
8311 else if (*drop)
8312 {
8313 some_unused = 1;
8314 last = ref_from_discarded;
8315 }
8316 else
8317 *drop = last;
8318 }
8319
8320 free (used);
8321
8322 if (some_unused)
8323 {
8324 bfd_byte *contents, *src;
8325 unsigned long off;
8326 Elf_Internal_Sym *sym;
8327 bfd_boolean local_toc_syms = FALSE;
8328
8329 /* Shuffle the toc contents, and at the same time convert the
8330 skip array from booleans into offsets. */
8331 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8332 goto error_ret;
8333
8334 elf_section_data (toc)->this_hdr.contents = contents;
8335
8336 for (src = contents, off = 0, drop = skip;
8337 src < contents + toc->size;
8338 src += 8, ++drop)
8339 {
8340 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8341 off += 8;
8342 else if (off != 0)
8343 {
8344 *drop = off;
8345 memcpy (src - off, src, 8);
8346 }
8347 }
8348 *drop = off;
8349 toc->rawsize = toc->size;
8350 toc->size = src - contents - off;
8351
8352 /* Adjust addends for relocs against the toc section sym,
8353 and optimize any accesses we can. */
8354 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8355 {
8356 if (sec->reloc_count == 0
8357 || elf_discarded_section (sec))
8358 continue;
8359
8360 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8361 info->keep_memory);
8362 if (relstart == NULL)
8363 goto error_ret;
8364
8365 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8366 {
8367 enum elf_ppc64_reloc_type r_type;
8368 unsigned long r_symndx;
8369 asection *sym_sec;
8370 struct elf_link_hash_entry *h;
8371 bfd_vma val;
8372
8373 r_type = ELF64_R_TYPE (rel->r_info);
8374 switch (r_type)
8375 {
8376 default:
8377 continue;
8378
8379 case R_PPC64_TOC16:
8380 case R_PPC64_TOC16_LO:
8381 case R_PPC64_TOC16_HI:
8382 case R_PPC64_TOC16_HA:
8383 case R_PPC64_TOC16_DS:
8384 case R_PPC64_TOC16_LO_DS:
8385 case R_PPC64_ADDR64:
8386 break;
8387 }
8388
8389 r_symndx = ELF64_R_SYM (rel->r_info);
8390 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8391 r_symndx, ibfd))
8392 goto error_ret;
8393
8394 if (sym_sec != toc)
8395 continue;
8396
8397 if (h != NULL)
8398 val = h->root.u.def.value;
8399 else
8400 {
8401 val = sym->st_value;
8402 if (val != 0)
8403 local_toc_syms = TRUE;
8404 }
8405
8406 val += rel->r_addend;
8407
8408 if (val > toc->rawsize)
8409 val = toc->rawsize;
8410 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8411 continue;
8412 else if ((skip[val >> 3] & can_optimize) != 0)
8413 {
8414 Elf_Internal_Rela *tocrel
8415 = toc_relocs + (skip[val >> 3] >> 2);
8416 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8417
8418 switch (r_type)
8419 {
8420 case R_PPC64_TOC16_HA:
8421 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8422 break;
8423
8424 case R_PPC64_TOC16_LO_DS:
8425 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8426 break;
8427
8428 default:
8429 abort ();
8430 }
8431 rel->r_addend = tocrel->r_addend;
8432 elf_section_data (sec)->relocs = relstart;
8433 continue;
8434 }
8435
8436 if (h != NULL || sym->st_value != 0)
8437 continue;
8438
8439 rel->r_addend -= skip[val >> 3];
8440 elf_section_data (sec)->relocs = relstart;
8441 }
8442
8443 if (elf_section_data (sec)->relocs != relstart)
8444 free (relstart);
8445 }
8446
8447 /* We shouldn't have local or global symbols defined in the TOC,
8448 but handle them anyway. */
8449 if (local_syms != NULL)
8450 for (sym = local_syms;
8451 sym < local_syms + symtab_hdr->sh_info;
8452 ++sym)
8453 if (sym->st_value != 0
8454 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8455 {
8456 unsigned long i;
8457
8458 if (sym->st_value > toc->rawsize)
8459 i = toc->rawsize >> 3;
8460 else
8461 i = sym->st_value >> 3;
8462
8463 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8464 {
8465 if (local_toc_syms)
8466 (*_bfd_error_handler)
8467 (_("%s defined on removed toc entry"),
8468 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8469 do
8470 ++i;
8471 while ((skip[i] & (ref_from_discarded | can_optimize)));
8472 sym->st_value = (bfd_vma) i << 3;
8473 }
8474
8475 sym->st_value -= skip[i];
8476 symtab_hdr->contents = (unsigned char *) local_syms;
8477 }
8478
8479 /* Adjust any global syms defined in this toc input section. */
8480 if (toc_inf.global_toc_syms)
8481 {
8482 toc_inf.toc = toc;
8483 toc_inf.skip = skip;
8484 toc_inf.global_toc_syms = FALSE;
8485 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8486 &toc_inf);
8487 }
8488
8489 if (toc->reloc_count != 0)
8490 {
8491 Elf_Internal_Shdr *rel_hdr;
8492 Elf_Internal_Rela *wrel;
8493 bfd_size_type sz;
8494
8495 /* Remove unused toc relocs, and adjust those we keep. */
8496 if (toc_relocs == NULL)
8497 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8498 info->keep_memory);
8499 if (toc_relocs == NULL)
8500 goto error_ret;
8501
8502 wrel = toc_relocs;
8503 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8504 if ((skip[rel->r_offset >> 3]
8505 & (ref_from_discarded | can_optimize)) == 0)
8506 {
8507 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8508 wrel->r_info = rel->r_info;
8509 wrel->r_addend = rel->r_addend;
8510 ++wrel;
8511 }
8512 else if (!dec_dynrel_count (rel->r_info, toc, info,
8513 &local_syms, NULL, NULL))
8514 goto error_ret;
8515
8516 elf_section_data (toc)->relocs = toc_relocs;
8517 toc->reloc_count = wrel - toc_relocs;
8518 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8519 sz = rel_hdr->sh_entsize;
8520 rel_hdr->sh_size = toc->reloc_count * sz;
8521 }
8522 }
8523 else if (toc_relocs != NULL
8524 && elf_section_data (toc)->relocs != toc_relocs)
8525 free (toc_relocs);
8526
8527 if (local_syms != NULL
8528 && symtab_hdr->contents != (unsigned char *) local_syms)
8529 {
8530 if (!info->keep_memory)
8531 free (local_syms);
8532 else
8533 symtab_hdr->contents = (unsigned char *) local_syms;
8534 }
8535 free (skip);
8536 }
8537
8538 return TRUE;
8539}
8540
8541/* Return true iff input section I references the TOC using
8542 instructions limited to +/-32k offsets. */
8543
8544bfd_boolean
8545ppc64_elf_has_small_toc_reloc (asection *i)
8546{
8547 return (is_ppc64_elf (i->owner)
8548 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8549}
8550
8551/* Allocate space for one GOT entry. */
8552
8553static void
8554allocate_got (struct elf_link_hash_entry *h,
8555 struct bfd_link_info *info,
8556 struct got_entry *gent)
8557{
8558 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8559 bfd_boolean dyn;
8560 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8561 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8562 ? 16 : 8);
8563 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8564 ? 2 : 1) * sizeof (Elf64_External_Rela);
8565 asection *got = ppc64_elf_tdata (gent->owner)->got;
8566
8567 gent->got.offset = got->size;
8568 got->size += entsize;
8569
8570 dyn = htab->elf.dynamic_sections_created;
8571 if ((info->shared
8572 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8573 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8574 || h->root.type != bfd_link_hash_undefweak))
8575 {
8576 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8577 relgot->size += rentsize;
8578 }
8579 else if (h->type == STT_GNU_IFUNC)
8580 {
8581 asection *relgot = htab->reliplt;
8582 relgot->size += rentsize;
8583 htab->got_reli_size += rentsize;
8584 }
8585}
8586
8587/* This function merges got entries in the same toc group. */
8588
8589static void
8590merge_got_entries (struct got_entry **pent)
8591{
8592 struct got_entry *ent, *ent2;
8593
8594 for (ent = *pent; ent != NULL; ent = ent->next)
8595 if (!ent->is_indirect)
8596 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8597 if (!ent2->is_indirect
8598 && ent2->addend == ent->addend
8599 && ent2->tls_type == ent->tls_type
8600 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8601 {
8602 ent2->is_indirect = TRUE;
8603 ent2->got.ent = ent;
8604 }
8605}
8606
8607/* Allocate space in .plt, .got and associated reloc sections for
8608 dynamic relocs. */
8609
8610static bfd_boolean
8611allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8612{
8613 struct bfd_link_info *info;
8614 struct ppc_link_hash_table *htab;
8615 asection *s;
8616 struct ppc_link_hash_entry *eh;
8617 struct ppc_dyn_relocs *p;
8618 struct got_entry **pgent, *gent;
8619
8620 if (h->root.type == bfd_link_hash_indirect)
8621 return TRUE;
8622
8623 if (h->root.type == bfd_link_hash_warning)
8624 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8625
8626 info = (struct bfd_link_info *) inf;
8627 htab = ppc_hash_table (info);
8628 if (htab == NULL)
8629 return FALSE;
8630
8631 if ((htab->elf.dynamic_sections_created
8632 && h->dynindx != -1
8633 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8634 || h->type == STT_GNU_IFUNC)
8635 {
8636 struct plt_entry *pent;
8637 bfd_boolean doneone = FALSE;
8638 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8639 if (pent->plt.refcount > 0)
8640 {
8641 if (!htab->elf.dynamic_sections_created
8642 || h->dynindx == -1)
8643 {
8644 s = htab->iplt;
8645 pent->plt.offset = s->size;
8646 s->size += PLT_ENTRY_SIZE;
8647 s = htab->reliplt;
8648 }
8649 else
8650 {
8651 /* If this is the first .plt entry, make room for the special
8652 first entry. */
8653 s = htab->plt;
8654 if (s->size == 0)
8655 s->size += PLT_INITIAL_ENTRY_SIZE;
8656
8657 pent->plt.offset = s->size;
8658
8659 /* Make room for this entry. */
8660 s->size += PLT_ENTRY_SIZE;
8661
8662 /* Make room for the .glink code. */
8663 s = htab->glink;
8664 if (s->size == 0)
8665 s->size += GLINK_CALL_STUB_SIZE;
8666 /* We need bigger stubs past index 32767. */
8667 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8668 s->size += 4;
8669 s->size += 2*4;
8670
8671 /* We also need to make an entry in the .rela.plt section. */
8672 s = htab->relplt;
8673 }
8674 s->size += sizeof (Elf64_External_Rela);
8675 doneone = TRUE;
8676 }
8677 else
8678 pent->plt.offset = (bfd_vma) -1;
8679 if (!doneone)
8680 {
8681 h->plt.plist = NULL;
8682 h->needs_plt = 0;
8683 }
8684 }
8685 else
8686 {
8687 h->plt.plist = NULL;
8688 h->needs_plt = 0;
8689 }
8690
8691 eh = (struct ppc_link_hash_entry *) h;
8692 /* Run through the TLS GD got entries first if we're changing them
8693 to TPREL. */
8694 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8695 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8696 if (gent->got.refcount > 0
8697 && (gent->tls_type & TLS_GD) != 0)
8698 {
8699 /* This was a GD entry that has been converted to TPREL. If
8700 there happens to be a TPREL entry we can use that one. */
8701 struct got_entry *ent;
8702 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8703 if (ent->got.refcount > 0
8704 && (ent->tls_type & TLS_TPREL) != 0
8705 && ent->addend == gent->addend
8706 && ent->owner == gent->owner)
8707 {
8708 gent->got.refcount = 0;
8709 break;
8710 }
8711
8712 /* If not, then we'll be using our own TPREL entry. */
8713 if (gent->got.refcount != 0)
8714 gent->tls_type = TLS_TLS | TLS_TPREL;
8715 }
8716
8717 /* Remove any list entry that won't generate a word in the GOT before
8718 we call merge_got_entries. Otherwise we risk merging to empty
8719 entries. */
8720 pgent = &h->got.glist;
8721 while ((gent = *pgent) != NULL)
8722 if (gent->got.refcount > 0)
8723 {
8724 if ((gent->tls_type & TLS_LD) != 0
8725 && !h->def_dynamic)
8726 {
8727 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8728 *pgent = gent->next;
8729 }
8730 else
8731 pgent = &gent->next;
8732 }
8733 else
8734 *pgent = gent->next;
8735
8736 if (!htab->do_multi_toc)
8737 merge_got_entries (&h->got.glist);
8738
8739 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8740 if (!gent->is_indirect)
8741 {
8742 /* Make sure this symbol is output as a dynamic symbol.
8743 Undefined weak syms won't yet be marked as dynamic,
8744 nor will all TLS symbols. */
8745 if (h->dynindx == -1
8746 && !h->forced_local
8747 && h->type != STT_GNU_IFUNC
8748 && htab->elf.dynamic_sections_created)
8749 {
8750 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8751 return FALSE;
8752 }
8753
8754 if (!is_ppc64_elf (gent->owner))
8755 abort ();
8756
8757 allocate_got (h, info, gent);
8758 }
8759
8760 if (eh->dyn_relocs == NULL
8761 || (!htab->elf.dynamic_sections_created
8762 && h->type != STT_GNU_IFUNC))
8763 return TRUE;
8764
8765 /* In the shared -Bsymbolic case, discard space allocated for
8766 dynamic pc-relative relocs against symbols which turn out to be
8767 defined in regular objects. For the normal shared case, discard
8768 space for relocs that have become local due to symbol visibility
8769 changes. */
8770
8771 if (info->shared)
8772 {
8773 /* Relocs that use pc_count are those that appear on a call insn,
8774 or certain REL relocs (see must_be_dyn_reloc) that can be
8775 generated via assembly. We want calls to protected symbols to
8776 resolve directly to the function rather than going via the plt.
8777 If people want function pointer comparisons to work as expected
8778 then they should avoid writing weird assembly. */
8779 if (SYMBOL_CALLS_LOCAL (info, h))
8780 {
8781 struct ppc_dyn_relocs **pp;
8782
8783 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8784 {
8785 p->count -= p->pc_count;
8786 p->pc_count = 0;
8787 if (p->count == 0)
8788 *pp = p->next;
8789 else
8790 pp = &p->next;
8791 }
8792 }
8793
8794 /* Also discard relocs on undefined weak syms with non-default
8795 visibility. */
8796 if (eh->dyn_relocs != NULL
8797 && h->root.type == bfd_link_hash_undefweak)
8798 {
8799 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8800 eh->dyn_relocs = NULL;
8801
8802 /* Make sure this symbol is output as a dynamic symbol.
8803 Undefined weak syms won't yet be marked as dynamic. */
8804 else if (h->dynindx == -1
8805 && !h->forced_local)
8806 {
8807 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8808 return FALSE;
8809 }
8810 }
8811 }
8812 else if (h->type == STT_GNU_IFUNC)
8813 {
8814 if (!h->non_got_ref)
8815 eh->dyn_relocs = NULL;
8816 }
8817 else if (ELIMINATE_COPY_RELOCS)
8818 {
8819 /* For the non-shared case, discard space for relocs against
8820 symbols which turn out to need copy relocs or are not
8821 dynamic. */
8822
8823 if (!h->non_got_ref
8824 && !h->def_regular)
8825 {
8826 /* Make sure this symbol is output as a dynamic symbol.
8827 Undefined weak syms won't yet be marked as dynamic. */
8828 if (h->dynindx == -1
8829 && !h->forced_local)
8830 {
8831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8832 return FALSE;
8833 }
8834
8835 /* If that succeeded, we know we'll be keeping all the
8836 relocs. */
8837 if (h->dynindx != -1)
8838 goto keep;
8839 }
8840
8841 eh->dyn_relocs = NULL;
8842
8843 keep: ;
8844 }
8845
8846 /* Finally, allocate space. */
8847 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8848 {
8849 asection *sreloc = elf_section_data (p->sec)->sreloc;
8850 if (!htab->elf.dynamic_sections_created)
8851 sreloc = htab->reliplt;
8852 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8853 }
8854
8855 return TRUE;
8856}
8857
8858/* Find any dynamic relocs that apply to read-only sections. */
8859
8860static bfd_boolean
8861readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8862{
8863 struct ppc_link_hash_entry *eh;
8864 struct ppc_dyn_relocs *p;
8865
8866 if (h->root.type == bfd_link_hash_warning)
8867 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8868
8869 eh = (struct ppc_link_hash_entry *) h;
8870 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8871 {
8872 asection *s = p->sec->output_section;
8873
8874 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8875 {
8876 struct bfd_link_info *info = inf;
8877
8878 info->flags |= DF_TEXTREL;
8879
8880 /* Not an error, just cut short the traversal. */
8881 return FALSE;
8882 }
8883 }
8884 return TRUE;
8885}
8886
8887/* Set the sizes of the dynamic sections. */
8888
8889static bfd_boolean
8890ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8891 struct bfd_link_info *info)
8892{
8893 struct ppc_link_hash_table *htab;
8894 bfd *dynobj;
8895 asection *s;
8896 bfd_boolean relocs;
8897 bfd *ibfd;
8898 struct got_entry *first_tlsld;
8899
8900 htab = ppc_hash_table (info);
8901 if (htab == NULL)
8902 return FALSE;
8903
8904 dynobj = htab->elf.dynobj;
8905 if (dynobj == NULL)
8906 abort ();
8907
8908 if (htab->elf.dynamic_sections_created)
8909 {
8910 /* Set the contents of the .interp section to the interpreter. */
8911 if (info->executable)
8912 {
8913 s = bfd_get_section_by_name (dynobj, ".interp");
8914 if (s == NULL)
8915 abort ();
8916 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8917 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8918 }
8919 }
8920
8921 /* Set up .got offsets for local syms, and space for local dynamic
8922 relocs. */
8923 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8924 {
8925 struct got_entry **lgot_ents;
8926 struct got_entry **end_lgot_ents;
8927 struct plt_entry **local_plt;
8928 struct plt_entry **end_local_plt;
8929 unsigned char *lgot_masks;
8930 bfd_size_type locsymcount;
8931 Elf_Internal_Shdr *symtab_hdr;
8932 asection *srel;
8933
8934 if (!is_ppc64_elf (ibfd))
8935 continue;
8936
8937 for (s = ibfd->sections; s != NULL; s = s->next)
8938 {
8939 struct ppc_dyn_relocs *p;
8940
8941 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8942 {
8943 if (!bfd_is_abs_section (p->sec)
8944 && bfd_is_abs_section (p->sec->output_section))
8945 {
8946 /* Input section has been discarded, either because
8947 it is a copy of a linkonce section or due to
8948 linker script /DISCARD/, so we'll be discarding
8949 the relocs too. */
8950 }
8951 else if (p->count != 0)
8952 {
8953 srel = elf_section_data (p->sec)->sreloc;
8954 if (!htab->elf.dynamic_sections_created)
8955 srel = htab->reliplt;
8956 srel->size += p->count * sizeof (Elf64_External_Rela);
8957 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8958 info->flags |= DF_TEXTREL;
8959 }
8960 }
8961 }
8962
8963 lgot_ents = elf_local_got_ents (ibfd);
8964 if (!lgot_ents)
8965 continue;
8966
8967 symtab_hdr = &elf_symtab_hdr (ibfd);
8968 locsymcount = symtab_hdr->sh_info;
8969 end_lgot_ents = lgot_ents + locsymcount;
8970 local_plt = (struct plt_entry **) end_lgot_ents;
8971 end_local_plt = local_plt + locsymcount;
8972 lgot_masks = (unsigned char *) end_local_plt;
8973 s = ppc64_elf_tdata (ibfd)->got;
8974 srel = ppc64_elf_tdata (ibfd)->relgot;
8975 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8976 {
8977 struct got_entry **pent, *ent;
8978
8979 pent = lgot_ents;
8980 while ((ent = *pent) != NULL)
8981 if (ent->got.refcount > 0)
8982 {
8983 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8984 {
8985 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8986 *pent = ent->next;
8987 }
8988 else
8989 {
8990 unsigned int num = 1;
8991 ent->got.offset = s->size;
8992 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8993 num = 2;
8994 s->size += num * 8;
8995 if (info->shared)
8996 srel->size += num * sizeof (Elf64_External_Rela);
8997 else if ((*lgot_masks & PLT_IFUNC) != 0)
8998 {
8999 htab->reliplt->size
9000 += num * sizeof (Elf64_External_Rela);
9001 htab->got_reli_size
9002 += num * sizeof (Elf64_External_Rela);
9003 }
9004 pent = &ent->next;
9005 }
9006 }
9007 else
9008 *pent = ent->next;
9009 }
9010
9011 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9012 for (; local_plt < end_local_plt; ++local_plt)
9013 {
9014 struct plt_entry *ent;
9015
9016 for (ent = *local_plt; ent != NULL; ent = ent->next)
9017 if (ent->plt.refcount > 0)
9018 {
9019 s = htab->iplt;
9020 ent->plt.offset = s->size;
9021 s->size += PLT_ENTRY_SIZE;
9022
9023 htab->reliplt->size += sizeof (Elf64_External_Rela);
9024 }
9025 else
9026 ent->plt.offset = (bfd_vma) -1;
9027 }
9028 }
9029
9030 /* Allocate global sym .plt and .got entries, and space for global
9031 sym dynamic relocs. */
9032 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9033
9034 first_tlsld = NULL;
9035 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9036 {
9037 struct got_entry *ent;
9038
9039 if (!is_ppc64_elf (ibfd))
9040 continue;
9041
9042 ent = ppc64_tlsld_got (ibfd);
9043 if (ent->got.refcount > 0)
9044 {
9045 if (!htab->do_multi_toc && first_tlsld != NULL)
9046 {
9047 ent->is_indirect = TRUE;
9048 ent->got.ent = first_tlsld;
9049 }
9050 else
9051 {
9052 if (first_tlsld == NULL)
9053 first_tlsld = ent;
9054 s = ppc64_elf_tdata (ibfd)->got;
9055 ent->got.offset = s->size;
9056 ent->owner = ibfd;
9057 s->size += 16;
9058 if (info->shared)
9059 {
9060 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9061 srel->size += sizeof (Elf64_External_Rela);
9062 }
9063 }
9064 }
9065 else
9066 ent->got.offset = (bfd_vma) -1;
9067 }
9068
9069 /* We now have determined the sizes of the various dynamic sections.
9070 Allocate memory for them. */
9071 relocs = FALSE;
9072 for (s = dynobj->sections; s != NULL; s = s->next)
9073 {
9074 if ((s->flags & SEC_LINKER_CREATED) == 0)
9075 continue;
9076
9077 if (s == htab->brlt || s == htab->relbrlt)
9078 /* These haven't been allocated yet; don't strip. */
9079 continue;
9080 else if (s == htab->got
9081 || s == htab->plt
9082 || s == htab->iplt
9083 || s == htab->glink
9084 || s == htab->dynbss)
9085 {
9086 /* Strip this section if we don't need it; see the
9087 comment below. */
9088 }
9089 else if (CONST_STRNEQ (s->name, ".rela"))
9090 {
9091 if (s->size != 0)
9092 {
9093 if (s != htab->relplt)
9094 relocs = TRUE;
9095
9096 /* We use the reloc_count field as a counter if we need
9097 to copy relocs into the output file. */
9098 s->reloc_count = 0;
9099 }
9100 }
9101 else
9102 {
9103 /* It's not one of our sections, so don't allocate space. */
9104 continue;
9105 }
9106
9107 if (s->size == 0)
9108 {
9109 /* If we don't need this section, strip it from the
9110 output file. This is mostly to handle .rela.bss and
9111 .rela.plt. We must create both sections in
9112 create_dynamic_sections, because they must be created
9113 before the linker maps input sections to output
9114 sections. The linker does that before
9115 adjust_dynamic_symbol is called, and it is that
9116 function which decides whether anything needs to go
9117 into these sections. */
9118 s->flags |= SEC_EXCLUDE;
9119 continue;
9120 }
9121
9122 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9123 continue;
9124
9125 /* Allocate memory for the section contents. We use bfd_zalloc
9126 here in case unused entries are not reclaimed before the
9127 section's contents are written out. This should not happen,
9128 but this way if it does we get a R_PPC64_NONE reloc in .rela
9129 sections instead of garbage.
9130 We also rely on the section contents being zero when writing
9131 the GOT. */
9132 s->contents = bfd_zalloc (dynobj, s->size);
9133 if (s->contents == NULL)
9134 return FALSE;
9135 }
9136
9137 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9138 {
9139 if (!is_ppc64_elf (ibfd))
9140 continue;
9141
9142 s = ppc64_elf_tdata (ibfd)->got;
9143 if (s != NULL && s != htab->got)
9144 {
9145 if (s->size == 0)
9146 s->flags |= SEC_EXCLUDE;
9147 else
9148 {
9149 s->contents = bfd_zalloc (ibfd, s->size);
9150 if (s->contents == NULL)
9151 return FALSE;
9152 }
9153 }
9154 s = ppc64_elf_tdata (ibfd)->relgot;
9155 if (s != NULL)
9156 {
9157 if (s->size == 0)
9158 s->flags |= SEC_EXCLUDE;
9159 else
9160 {
9161 s->contents = bfd_zalloc (ibfd, s->size);
9162 if (s->contents == NULL)
9163 return FALSE;
9164 relocs = TRUE;
9165 s->reloc_count = 0;
9166 }
9167 }
9168 }
9169
9170 if (htab->elf.dynamic_sections_created)
9171 {
9172 /* Add some entries to the .dynamic section. We fill in the
9173 values later, in ppc64_elf_finish_dynamic_sections, but we
9174 must add the entries now so that we get the correct size for
9175 the .dynamic section. The DT_DEBUG entry is filled in by the
9176 dynamic linker and used by the debugger. */
9177#define add_dynamic_entry(TAG, VAL) \
9178 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9179
9180 if (info->executable)
9181 {
9182 if (!add_dynamic_entry (DT_DEBUG, 0))
9183 return FALSE;
9184 }
9185
9186 if (htab->plt != NULL && htab->plt->size != 0)
9187 {
9188 if (!add_dynamic_entry (DT_PLTGOT, 0)
9189 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9190 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9191 || !add_dynamic_entry (DT_JMPREL, 0)
9192 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9193 return FALSE;
9194 }
9195
9196 if (NO_OPD_RELOCS)
9197 {
9198 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9199 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9200 return FALSE;
9201 }
9202
9203 if (!htab->no_tls_get_addr_opt
9204 && htab->tls_get_addr_fd != NULL
9205 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9206 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9207 return FALSE;
9208
9209 if (relocs)
9210 {
9211 if (!add_dynamic_entry (DT_RELA, 0)
9212 || !add_dynamic_entry (DT_RELASZ, 0)
9213 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9214 return FALSE;
9215
9216 /* If any dynamic relocs apply to a read-only section,
9217 then we need a DT_TEXTREL entry. */
9218 if ((info->flags & DF_TEXTREL) == 0)
9219 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9220
9221 if ((info->flags & DF_TEXTREL) != 0)
9222 {
9223 if (!add_dynamic_entry (DT_TEXTREL, 0))
9224 return FALSE;
9225 }
9226 }
9227 }
9228#undef add_dynamic_entry
9229
9230 return TRUE;
9231}
9232
9233/* Determine the type of stub needed, if any, for a call. */
9234
9235static inline enum ppc_stub_type
9236ppc_type_of_stub (asection *input_sec,
9237 const Elf_Internal_Rela *rel,
9238 struct ppc_link_hash_entry **hash,
9239 struct plt_entry **plt_ent,
9240 bfd_vma destination)
9241{
9242 struct ppc_link_hash_entry *h = *hash;
9243 bfd_vma location;
9244 bfd_vma branch_offset;
9245 bfd_vma max_branch_offset;
9246 enum elf_ppc64_reloc_type r_type;
9247
9248 if (h != NULL)
9249 {
9250 struct plt_entry *ent;
9251 struct ppc_link_hash_entry *fdh = h;
9252 if (h->oh != NULL
9253 && h->oh->is_func_descriptor)
9254 {
9255 fdh = ppc_follow_link (h->oh);
9256 *hash = fdh;
9257 }
9258
9259 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9260 if (ent->addend == rel->r_addend
9261 && ent->plt.offset != (bfd_vma) -1)
9262 {
9263 *plt_ent = ent;
9264 return ppc_stub_plt_call;
9265 }
9266
9267 /* Here, we know we don't have a plt entry. If we don't have a
9268 either a defined function descriptor or a defined entry symbol
9269 in a regular object file, then it is pointless trying to make
9270 any other type of stub. */
9271 if (!is_static_defined (&fdh->elf)
9272 && !is_static_defined (&h->elf))
9273 return ppc_stub_none;
9274 }
9275 else if (elf_local_got_ents (input_sec->owner) != NULL)
9276 {
9277 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9278 struct plt_entry **local_plt = (struct plt_entry **)
9279 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9280 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9281
9282 if (local_plt[r_symndx] != NULL)
9283 {
9284 struct plt_entry *ent;
9285
9286 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9287 if (ent->addend == rel->r_addend
9288 && ent->plt.offset != (bfd_vma) -1)
9289 {
9290 *plt_ent = ent;
9291 return ppc_stub_plt_call;
9292 }
9293 }
9294 }
9295
9296 /* Determine where the call point is. */
9297 location = (input_sec->output_offset
9298 + input_sec->output_section->vma
9299 + rel->r_offset);
9300
9301 branch_offset = destination - location;
9302 r_type = ELF64_R_TYPE (rel->r_info);
9303
9304 /* Determine if a long branch stub is needed. */
9305 max_branch_offset = 1 << 25;
9306 if (r_type != R_PPC64_REL24)
9307 max_branch_offset = 1 << 15;
9308
9309 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9310 /* We need a stub. Figure out whether a long_branch or plt_branch
9311 is needed later. */
9312 return ppc_stub_long_branch;
9313
9314 return ppc_stub_none;
9315}
9316
9317/* Build a .plt call stub. */
9318
9319static inline bfd_byte *
9320build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9321{
9322#define PPC_LO(v) ((v) & 0xffff)
9323#define PPC_HI(v) (((v) >> 16) & 0xffff)
9324#define PPC_HA(v) PPC_HI ((v) + 0x8000)
9325
9326 if (PPC_HA (offset) != 0)
9327 {
9328 if (r != NULL)
9329 {
9330 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9331 r[1].r_offset = r[0].r_offset + 8;
9332 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9333 r[1].r_addend = r[0].r_addend;
9334 if (PPC_HA (offset + 16) != PPC_HA (offset))
9335 {
9336 r[2].r_offset = r[1].r_offset + 4;
9337 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9338 r[2].r_addend = r[0].r_addend;
9339 }
9340 else
9341 {
9342 r[2].r_offset = r[1].r_offset + 8;
9343 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9344 r[2].r_addend = r[0].r_addend + 8;
9345 r[3].r_offset = r[2].r_offset + 4;
9346 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9347 r[3].r_addend = r[0].r_addend + 16;
9348 }
9349 }
9350 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9351 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9352 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9353 if (PPC_HA (offset + 16) != PPC_HA (offset))
9354 {
9355 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9356 offset = 0;
9357 }
9358 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9359 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9360 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9361 bfd_put_32 (obfd, BCTR, p), p += 4;
9362 }
9363 else
9364 {
9365 if (r != NULL)
9366 {
9367 r[0].r_offset += 4;
9368 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9369 if (PPC_HA (offset + 16) != PPC_HA (offset))
9370 {
9371 r[1].r_offset = r[0].r_offset + 4;
9372 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9373 r[1].r_addend = r[0].r_addend;
9374 }
9375 else
9376 {
9377 r[1].r_offset = r[0].r_offset + 8;
9378 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9379 r[1].r_addend = r[0].r_addend + 16;
9380 r[2].r_offset = r[1].r_offset + 4;
9381 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9382 r[2].r_addend = r[0].r_addend + 8;
9383 }
9384 }
9385 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9386 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9387 if (PPC_HA (offset + 16) != PPC_HA (offset))
9388 {
9389 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9390 offset = 0;
9391 }
9392 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9393 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9394 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9395 bfd_put_32 (obfd, BCTR, p), p += 4;
9396 }
9397 return p;
9398}
9399
9400/* Build a special .plt call stub for __tls_get_addr. */
9401
9402#define LD_R11_0R3 0xe9630000
9403#define LD_R12_0R3 0xe9830000
9404#define MR_R0_R3 0x7c601b78
9405#define CMPDI_R11_0 0x2c2b0000
9406#define ADD_R3_R12_R13 0x7c6c6a14
9407#define BEQLR 0x4d820020
9408#define MR_R3_R0 0x7c030378
9409#define MFLR_R11 0x7d6802a6
9410#define STD_R11_0R1 0xf9610000
9411#define BCTRL 0x4e800421
9412#define LD_R11_0R1 0xe9610000
9413#define LD_R2_0R1 0xe8410000
9414#define MTLR_R11 0x7d6803a6
9415
9416static inline bfd_byte *
9417build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9418 Elf_Internal_Rela *r)
9419{
9420 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9421 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9422 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9423 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9424 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9425 bfd_put_32 (obfd, BEQLR, p), p += 4;
9426 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9427 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9428 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9429
9430 if (r != NULL)
9431 r[0].r_offset += 9 * 4;
9432 p = build_plt_stub (obfd, p, offset, r);
9433 bfd_put_32 (obfd, BCTRL, p - 4);
9434
9435 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9436 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9437 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9438 bfd_put_32 (obfd, BLR, p), p += 4;
9439
9440 return p;
9441}
9442
9443static Elf_Internal_Rela *
9444get_relocs (asection *sec, int count)
9445{
9446 Elf_Internal_Rela *relocs;
9447 struct bfd_elf_section_data *elfsec_data;
9448
9449 elfsec_data = elf_section_data (sec);
9450 relocs = elfsec_data->relocs;
9451 if (relocs == NULL)
9452 {
9453 bfd_size_type relsize;
9454 relsize = sec->reloc_count * sizeof (*relocs);
9455 relocs = bfd_alloc (sec->owner, relsize);
9456 if (relocs == NULL)
9457 return NULL;
9458 elfsec_data->relocs = relocs;
9459 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9460 sizeof (Elf_Internal_Shdr));
9461 if (elfsec_data->rela.hdr == NULL)
9462 return NULL;
9463 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9464 * sizeof (Elf64_External_Rela));
9465 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9466 sec->reloc_count = 0;
9467 }
9468 relocs += sec->reloc_count;
9469 sec->reloc_count += count;
9470 return relocs;
9471}
9472
9473static bfd_vma
9474get_r2off (struct ppc_link_hash_table *htab,
9475 struct ppc_stub_hash_entry *stub_entry)
9476{
9477 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9478
9479 if (r2off == 0)
9480 {
9481 /* Support linking -R objects. Get the toc pointer from the
9482 opd entry. */
9483 char buf[8];
9484 asection *opd = stub_entry->h->elf.root.u.def.section;
9485 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9486
9487 if (strcmp (opd->name, ".opd") != 0
9488 || opd->reloc_count != 0)
9489 {
9490 (*_bfd_error_handler) (_("cannot find opd entry toc for %s"),
9491 stub_entry->h->elf.root.root.string);
9492 bfd_set_error (bfd_error_bad_value);
9493 return 0;
9494 }
9495 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9496 return 0;
9497 r2off = bfd_get_64 (opd->owner, buf);
9498 r2off -= elf_gp (stub_entry->id_sec->output_section->owner);
9499 }
9500 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9501 return r2off;
9502}
9503
9504static bfd_boolean
9505ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9506{
9507 struct ppc_stub_hash_entry *stub_entry;
9508 struct ppc_branch_hash_entry *br_entry;
9509 struct bfd_link_info *info;
9510 struct ppc_link_hash_table *htab;
9511 bfd_byte *loc;
9512 bfd_byte *p;
9513 bfd_vma dest, off;
9514 int size;
9515 Elf_Internal_Rela *r;
9516 asection *plt;
9517
9518 /* Massage our args to the form they really have. */
9519 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9520 info = in_arg;
9521
9522 htab = ppc_hash_table (info);
9523 if (htab == NULL)
9524 return FALSE;
9525
9526 /* Make a note of the offset within the stubs for this entry. */
9527 stub_entry->stub_offset = stub_entry->stub_sec->size;
9528 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9529
9530 htab->stub_count[stub_entry->stub_type - 1] += 1;
9531 switch (stub_entry->stub_type)
9532 {
9533 case ppc_stub_long_branch:
9534 case ppc_stub_long_branch_r2off:
9535 /* Branches are relative. This is where we are going to. */
9536 off = dest = (stub_entry->target_value
9537 + stub_entry->target_section->output_offset
9538 + stub_entry->target_section->output_section->vma);
9539
9540 /* And this is where we are coming from. */
9541 off -= (stub_entry->stub_offset
9542 + stub_entry->stub_sec->output_offset
9543 + stub_entry->stub_sec->output_section->vma);
9544
9545 size = 4;
9546 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9547 {
9548 bfd_vma r2off = get_r2off (htab, stub_entry);
9549
9550 if (r2off == 0)
9551 {
9552 htab->stub_error = TRUE;
9553 return FALSE;
9554 }
9555 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9556 loc += 4;
9557 size = 12;
9558 if (PPC_HA (r2off) != 0)
9559 {
9560 size = 16;
9561 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9562 loc += 4;
9563 }
9564 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9565 loc += 4;
9566 off -= size - 4;
9567 }
9568 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9569
9570 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9571 {
9572 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9573 stub_entry->root.string);
9574 htab->stub_error = TRUE;
9575 return FALSE;
9576 }
9577
9578 if (info->emitrelocations)
9579 {
9580 r = get_relocs (stub_entry->stub_sec, 1);
9581 if (r == NULL)
9582 return FALSE;
9583 r->r_offset = loc - stub_entry->stub_sec->contents;
9584 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9585 r->r_addend = dest;
9586 if (stub_entry->h != NULL)
9587 {
9588 struct elf_link_hash_entry **hashes;
9589 unsigned long symndx;
9590 struct ppc_link_hash_entry *h;
9591
9592 hashes = elf_sym_hashes (htab->stub_bfd);
9593 if (hashes == NULL)
9594 {
9595 bfd_size_type hsize;
9596
9597 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9598 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9599 if (hashes == NULL)
9600 return FALSE;
9601 elf_sym_hashes (htab->stub_bfd) = hashes;
9602 htab->stub_globals = 1;
9603 }
9604 symndx = htab->stub_globals++;
9605 h = stub_entry->h;
9606 hashes[symndx] = &h->elf;
9607 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9608 if (h->oh != NULL && h->oh->is_func)
9609 h = ppc_follow_link (h->oh);
9610 if (h->elf.root.u.def.section != stub_entry->target_section)
9611 /* H is an opd symbol. The addend must be zero. */
9612 r->r_addend = 0;
9613 else
9614 {
9615 off = (h->elf.root.u.def.value
9616 + h->elf.root.u.def.section->output_offset
9617 + h->elf.root.u.def.section->output_section->vma);
9618 r->r_addend -= off;
9619 }
9620 }
9621 }
9622 break;
9623
9624 case ppc_stub_plt_branch:
9625 case ppc_stub_plt_branch_r2off:
9626 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9627 stub_entry->root.string + 9,
9628 FALSE, FALSE);
9629 if (br_entry == NULL)
9630 {
9631 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9632 stub_entry->root.string);
9633 htab->stub_error = TRUE;
9634 return FALSE;
9635 }
9636
9637 dest = (stub_entry->target_value
9638 + stub_entry->target_section->output_offset
9639 + stub_entry->target_section->output_section->vma);
9640
9641 bfd_put_64 (htab->brlt->owner, dest,
9642 htab->brlt->contents + br_entry->offset);
9643
9644 if (br_entry->iter == htab->stub_iteration)
9645 {
9646 br_entry->iter = 0;
9647
9648 if (htab->relbrlt != NULL)
9649 {
9650 /* Create a reloc for the branch lookup table entry. */
9651 Elf_Internal_Rela rela;
9652 bfd_byte *rl;
9653
9654 rela.r_offset = (br_entry->offset
9655 + htab->brlt->output_offset
9656 + htab->brlt->output_section->vma);
9657 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9658 rela.r_addend = dest;
9659
9660 rl = htab->relbrlt->contents;
9661 rl += (htab->relbrlt->reloc_count++
9662 * sizeof (Elf64_External_Rela));
9663 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9664 }
9665 else if (info->emitrelocations)
9666 {
9667 r = get_relocs (htab->brlt, 1);
9668 if (r == NULL)
9669 return FALSE;
9670 /* brlt, being SEC_LINKER_CREATED does not go through the
9671 normal reloc processing. Symbols and offsets are not
9672 translated from input file to output file form, so
9673 set up the offset per the output file. */
9674 r->r_offset = (br_entry->offset
9675 + htab->brlt->output_offset
9676 + htab->brlt->output_section->vma);
9677 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9678 r->r_addend = dest;
9679 }
9680 }
9681
9682 dest = (br_entry->offset
9683 + htab->brlt->output_offset
9684 + htab->brlt->output_section->vma);
9685
9686 off = (dest
9687 - elf_gp (htab->brlt->output_section->owner)
9688 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9689
9690 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9691 {
9692 (*_bfd_error_handler)
9693 (_("linkage table error against `%s'"),
9694 stub_entry->root.string);
9695 bfd_set_error (bfd_error_bad_value);
9696 htab->stub_error = TRUE;
9697 return FALSE;
9698 }
9699
9700 if (info->emitrelocations)
9701 {
9702 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9703 if (r == NULL)
9704 return FALSE;
9705 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9706 if (bfd_big_endian (info->output_bfd))
9707 r[0].r_offset += 2;
9708 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9709 r[0].r_offset += 4;
9710 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9711 r[0].r_addend = dest;
9712 if (PPC_HA (off) != 0)
9713 {
9714 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9715 r[1].r_offset = r[0].r_offset + 4;
9716 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9717 r[1].r_addend = r[0].r_addend;
9718 }
9719 }
9720
9721 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9722 {
9723 if (PPC_HA (off) != 0)
9724 {
9725 size = 16;
9726 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9727 loc += 4;
9728 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9729 }
9730 else
9731 {
9732 size = 12;
9733 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9734 }
9735 }
9736 else
9737 {
9738 bfd_vma r2off = get_r2off (htab, stub_entry);
9739
9740 if (r2off == 0)
9741 {
9742 htab->stub_error = TRUE;
9743 return FALSE;
9744 }
9745
9746 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9747 loc += 4;
9748 size = 20;
9749 if (PPC_HA (off) != 0)
9750 {
9751 size += 4;
9752 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9753 loc += 4;
9754 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9755 loc += 4;
9756 }
9757 else
9758 {
9759 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9760 loc += 4;
9761 }
9762
9763 if (PPC_HA (r2off) != 0)
9764 {
9765 size += 4;
9766 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9767 loc += 4;
9768 }
9769 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9770 }
9771 loc += 4;
9772 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9773 loc += 4;
9774 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9775 break;
9776
9777 case ppc_stub_plt_call:
9778 if (stub_entry->h != NULL
9779 && stub_entry->h->is_func_descriptor
9780 && stub_entry->h->oh != NULL)
9781 {
9782 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9783
9784 /* If the old-ABI "dot-symbol" is undefined make it weak so
9785 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9786 FIXME: We used to define the symbol on one of the call
9787 stubs instead, which is why we test symbol section id
9788 against htab->top_id in various places. Likely all
9789 these checks could now disappear. */
9790 if (fh->elf.root.type == bfd_link_hash_undefined)
9791 fh->elf.root.type = bfd_link_hash_undefweak;
9792 /* Stop undo_symbol_twiddle changing it back to undefined. */
9793 fh->was_undefined = 0;
9794 }
9795
9796 /* Now build the stub. */
9797 dest = stub_entry->plt_ent->plt.offset & ~1;
9798 if (dest >= (bfd_vma) -2)
9799 abort ();
9800
9801 plt = htab->plt;
9802 if (!htab->elf.dynamic_sections_created
9803 || stub_entry->h == NULL
9804 || stub_entry->h->elf.dynindx == -1)
9805 plt = htab->iplt;
9806
9807 dest += plt->output_offset + plt->output_section->vma;
9808
9809 if (stub_entry->h == NULL
9810 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9811 {
9812 Elf_Internal_Rela rela;
9813 bfd_byte *rl;
9814
9815 rela.r_offset = dest;
9816 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9817 rela.r_addend = (stub_entry->target_value
9818 + stub_entry->target_section->output_offset
9819 + stub_entry->target_section->output_section->vma);
9820
9821 rl = (htab->reliplt->contents
9822 + (htab->reliplt->reloc_count++
9823 * sizeof (Elf64_External_Rela)));
9824 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9825 stub_entry->plt_ent->plt.offset |= 1;
9826 }
9827
9828 off = (dest
9829 - elf_gp (plt->output_section->owner)
9830 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9831
9832 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9833 {
9834 (*_bfd_error_handler)
9835 (_("linkage table error against `%s'"),
9836 stub_entry->h != NULL
9837 ? stub_entry->h->elf.root.root.string
9838 : "<local sym>");
9839 bfd_set_error (bfd_error_bad_value);
9840 htab->stub_error = TRUE;
9841 return FALSE;
9842 }
9843
9844 r = NULL;
9845 if (info->emitrelocations)
9846 {
9847 r = get_relocs (stub_entry->stub_sec,
9848 (2 + (PPC_HA (off) != 0)
9849 + (PPC_HA (off + 16) == PPC_HA (off))));
9850 if (r == NULL)
9851 return FALSE;
9852 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9853 if (bfd_big_endian (info->output_bfd))
9854 r[0].r_offset += 2;
9855 r[0].r_addend = dest;
9856 }
9857 if (stub_entry->h != NULL
9858 && (stub_entry->h == htab->tls_get_addr_fd
9859 || stub_entry->h == htab->tls_get_addr)
9860 && !htab->no_tls_get_addr_opt)
9861 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9862 else
9863 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9864 size = p - loc;
9865 break;
9866
9867 default:
9868 BFD_FAIL ();
9869 return FALSE;
9870 }
9871
9872 stub_entry->stub_sec->size += size;
9873
9874 if (htab->emit_stub_syms)
9875 {
9876 struct elf_link_hash_entry *h;
9877 size_t len1, len2;
9878 char *name;
9879 const char *const stub_str[] = { "long_branch",
9880 "long_branch_r2off",
9881 "plt_branch",
9882 "plt_branch_r2off",
9883 "plt_call" };
9884
9885 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9886 len2 = strlen (stub_entry->root.string);
9887 name = bfd_malloc (len1 + len2 + 2);
9888 if (name == NULL)
9889 return FALSE;
9890 memcpy (name, stub_entry->root.string, 9);
9891 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9892 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9893 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9894 if (h == NULL)
9895 return FALSE;
9896 if (h->root.type == bfd_link_hash_new)
9897 {
9898 h->root.type = bfd_link_hash_defined;
9899 h->root.u.def.section = stub_entry->stub_sec;
9900 h->root.u.def.value = stub_entry->stub_offset;
9901 h->ref_regular = 1;
9902 h->def_regular = 1;
9903 h->ref_regular_nonweak = 1;
9904 h->forced_local = 1;
9905 h->non_elf = 0;
9906 }
9907 }
9908
9909 return TRUE;
9910}
9911
9912/* As above, but don't actually build the stub. Just bump offset so
9913 we know stub section sizes, and select plt_branch stubs where
9914 long_branch stubs won't do. */
9915
9916static bfd_boolean
9917ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9918{
9919 struct ppc_stub_hash_entry *stub_entry;
9920 struct bfd_link_info *info;
9921 struct ppc_link_hash_table *htab;
9922 bfd_vma off;
9923 int size;
9924
9925 /* Massage our args to the form they really have. */
9926 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9927 info = in_arg;
9928
9929 htab = ppc_hash_table (info);
9930 if (htab == NULL)
9931 return FALSE;
9932
9933 if (stub_entry->stub_type == ppc_stub_plt_call)
9934 {
9935 asection *plt;
9936 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9937 if (off >= (bfd_vma) -2)
9938 abort ();
9939 plt = htab->plt;
9940 if (!htab->elf.dynamic_sections_created
9941 || stub_entry->h == NULL
9942 || stub_entry->h->elf.dynindx == -1)
9943 plt = htab->iplt;
9944 off += (plt->output_offset
9945 + plt->output_section->vma
9946 - elf_gp (plt->output_section->owner)
9947 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9948
9949 size = PLT_CALL_STUB_SIZE;
9950 if (PPC_HA (off) == 0)
9951 size -= 4;
9952 if (PPC_HA (off + 16) != PPC_HA (off))
9953 size += 4;
9954 if (stub_entry->h != NULL
9955 && (stub_entry->h == htab->tls_get_addr_fd
9956 || stub_entry->h == htab->tls_get_addr)
9957 && !htab->no_tls_get_addr_opt)
9958 size += 13 * 4;
9959 if (info->emitrelocations)
9960 {
9961 stub_entry->stub_sec->reloc_count
9962 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9963 stub_entry->stub_sec->flags |= SEC_RELOC;
9964 }
9965 }
9966 else
9967 {
9968 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9969 variants. */
9970 bfd_vma r2off = 0;
9971
9972 off = (stub_entry->target_value
9973 + stub_entry->target_section->output_offset
9974 + stub_entry->target_section->output_section->vma);
9975 off -= (stub_entry->stub_sec->size
9976 + stub_entry->stub_sec->output_offset
9977 + stub_entry->stub_sec->output_section->vma);
9978
9979 /* Reset the stub type from the plt variant in case we now
9980 can reach with a shorter stub. */
9981 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9982 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9983
9984 size = 4;
9985 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9986 {
9987 r2off = get_r2off (htab, stub_entry);
9988 if (r2off == 0)
9989 {
9990 htab->stub_error = TRUE;
9991 return FALSE;
9992 }
9993 size = 12;
9994 if (PPC_HA (r2off) != 0)
9995 size = 16;
9996 off -= size - 4;
9997 }
9998
9999 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10000 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10001 {
10002 struct ppc_branch_hash_entry *br_entry;
10003
10004 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10005 stub_entry->root.string + 9,
10006 TRUE, FALSE);
10007 if (br_entry == NULL)
10008 {
10009 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
10010 stub_entry->root.string);
10011 htab->stub_error = TRUE;
10012 return FALSE;
10013 }
10014
10015 if (br_entry->iter != htab->stub_iteration)
10016 {
10017 br_entry->iter = htab->stub_iteration;
10018 br_entry->offset = htab->brlt->size;
10019 htab->brlt->size += 8;
10020
10021 if (htab->relbrlt != NULL)
10022 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10023 else if (info->emitrelocations)
10024 {
10025 htab->brlt->reloc_count += 1;
10026 htab->brlt->flags |= SEC_RELOC;
10027 }
10028 }
10029
10030 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10031 off = (br_entry->offset
10032 + htab->brlt->output_offset
10033 + htab->brlt->output_section->vma
10034 - elf_gp (htab->brlt->output_section->owner)
10035 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10036
10037 if (info->emitrelocations)
10038 {
10039 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10040 stub_entry->stub_sec->flags |= SEC_RELOC;
10041 }
10042
10043 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10044 {
10045 size = 12;
10046 if (PPC_HA (off) != 0)
10047 size = 16;
10048 }
10049 else
10050 {
10051 size = 20;
10052 if (PPC_HA (off) != 0)
10053 size += 4;
10054
10055 if (PPC_HA (r2off) != 0)
10056 size += 4;
10057 }
10058 }
10059 else if (info->emitrelocations)
10060 {
10061 stub_entry->stub_sec->reloc_count += 1;
10062 stub_entry->stub_sec->flags |= SEC_RELOC;
10063 }
10064 }
10065
10066 stub_entry->stub_sec->size += size;
10067 return TRUE;
10068}
10069
10070/* Set up various things so that we can make a list of input sections
10071 for each output section included in the link. Returns -1 on error,
10072 0 when no stubs will be needed, and 1 on success. */
10073
10074int
10075ppc64_elf_setup_section_lists
10076 (struct bfd_link_info *info,
10077 asection *(*add_stub_section) (const char *, asection *),
10078 void (*layout_sections_again) (void))
10079{
10080 bfd *input_bfd;
10081 int top_id, top_index, id;
10082 asection *section;
10083 asection **input_list;
10084 bfd_size_type amt;
10085 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10086
10087 if (htab == NULL)
10088 return -1;
10089 /* Stash our params away. */
10090 htab->add_stub_section = add_stub_section;
10091 htab->layout_sections_again = layout_sections_again;
10092
10093 if (htab->brlt == NULL)
10094 return 0;
10095
10096 /* Find the top input section id. */
10097 for (input_bfd = info->input_bfds, top_id = 3;
10098 input_bfd != NULL;
10099 input_bfd = input_bfd->link_next)
10100 {
10101 for (section = input_bfd->sections;
10102 section != NULL;
10103 section = section->next)
10104 {
10105 if (top_id < section->id)
10106 top_id = section->id;
10107 }
10108 }
10109
10110 htab->top_id = top_id;
10111 amt = sizeof (struct map_stub) * (top_id + 1);
10112 htab->stub_group = bfd_zmalloc (amt);
10113 if (htab->stub_group == NULL)
10114 return -1;
10115
10116 /* Set toc_off for com, und, abs and ind sections. */
10117 for (id = 0; id < 3; id++)
10118 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10119
10120 /* We can't use output_bfd->section_count here to find the top output
10121 section index as some sections may have been removed, and
10122 strip_excluded_output_sections doesn't renumber the indices. */
10123 for (section = info->output_bfd->sections, top_index = 0;
10124 section != NULL;
10125 section = section->next)
10126 {
10127 if (top_index < section->index)
10128 top_index = section->index;
10129 }
10130
10131 htab->top_index = top_index;
10132 amt = sizeof (asection *) * (top_index + 1);
10133 input_list = bfd_zmalloc (amt);
10134 htab->input_list = input_list;
10135 if (input_list == NULL)
10136 return -1;
10137
10138 return 1;
10139}
10140
10141/* Set up for first pass at multitoc partitioning. */
10142
10143void
10144ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10145{
10146 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10147
10148 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10149 htab->toc_curr = elf_gp (info->output_bfd);
10150 htab->toc_bfd = NULL;
10151 htab->toc_first_sec = NULL;
10152}
10153
10154/* The linker repeatedly calls this function for each TOC input section
10155 and linker generated GOT section. Group input bfds such that the toc
10156 within a group is less than 64k in size. */
10157
10158bfd_boolean
10159ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10160{
10161 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10162 bfd_vma addr, off, limit;
10163
10164 if (htab == NULL)
10165 return FALSE;
10166
10167 if (!htab->second_toc_pass)
10168 {
10169 /* Keep track of the first .toc or .got section for this input bfd. */
10170 if (htab->toc_bfd != isec->owner)
10171 {
10172 htab->toc_bfd = isec->owner;
10173 htab->toc_first_sec = isec;
10174 }
10175
10176 addr = isec->output_offset + isec->output_section->vma;
10177 off = addr - htab->toc_curr;
10178 limit = 0x80008000;
10179 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10180 limit = 0x10000;
10181 if (off + isec->size > limit)
10182 {
10183 addr = (htab->toc_first_sec->output_offset
10184 + htab->toc_first_sec->output_section->vma);
10185 htab->toc_curr = addr;
10186 }
10187
10188 /* toc_curr is the base address of this toc group. Set elf_gp
10189 for the input section to be the offset relative to the
10190 output toc base plus 0x8000. Making the input elf_gp an
10191 offset allows us to move the toc as a whole without
10192 recalculating input elf_gp. */
10193 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10194 off += TOC_BASE_OFF;
10195
10196 /* Die if someone uses a linker script that doesn't keep input
10197 file .toc and .got together. */
10198 if (elf_gp (isec->owner) != 0
10199 && elf_gp (isec->owner) != off)
10200 return FALSE;
10201
10202 elf_gp (isec->owner) = off;
10203 return TRUE;
10204 }
10205
10206 /* During the second pass toc_first_sec points to the start of
10207 a toc group, and toc_curr is used to track the old elf_gp.
10208 We use toc_bfd to ensure we only look at each bfd once. */
10209 if (htab->toc_bfd == isec->owner)
10210 return TRUE;
10211 htab->toc_bfd = isec->owner;
10212
10213 if (htab->toc_first_sec == NULL
10214 || htab->toc_curr != elf_gp (isec->owner))
10215 {
10216 htab->toc_curr = elf_gp (isec->owner);
10217 htab->toc_first_sec = isec;
10218 }
10219 addr = (htab->toc_first_sec->output_offset
10220 + htab->toc_first_sec->output_section->vma);
10221 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10222 elf_gp (isec->owner) = off;
10223
10224 return TRUE;
10225}
10226
10227/* Called via elf_link_hash_traverse to merge GOT entries for global
10228 symbol H. */
10229
10230static bfd_boolean
10231merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10232{
10233 if (h->root.type == bfd_link_hash_indirect)
10234 return TRUE;
10235
10236 if (h->root.type == bfd_link_hash_warning)
10237 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10238
10239 merge_got_entries (&h->got.glist);
10240
10241 return TRUE;
10242}
10243
10244/* Called via elf_link_hash_traverse to allocate GOT entries for global
10245 symbol H. */
10246
10247static bfd_boolean
10248reallocate_got (struct elf_link_hash_entry *h, void *inf)
10249{
10250 struct got_entry *gent;
10251
10252 if (h->root.type == bfd_link_hash_indirect)
10253 return TRUE;
10254
10255 if (h->root.type == bfd_link_hash_warning)
10256 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10257
10258 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10259 if (!gent->is_indirect)
10260 allocate_got (h, (struct bfd_link_info *) inf, gent);
10261 return TRUE;
10262}
10263
10264/* Called on the first multitoc pass after the last call to
10265 ppc64_elf_next_toc_section. This function removes duplicate GOT
10266 entries. */
10267
10268bfd_boolean
10269ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10270{
10271 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10272 struct bfd *ibfd, *ibfd2;
10273 bfd_boolean done_something;
10274
10275 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10276
10277 if (!htab->do_multi_toc)
10278 return FALSE;
10279
10280 /* Merge global sym got entries within a toc group. */
10281 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10282
10283 /* And tlsld_got. */
10284 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10285 {
10286 struct got_entry *ent, *ent2;
10287
10288 if (!is_ppc64_elf (ibfd))
10289 continue;
10290
10291 ent = ppc64_tlsld_got (ibfd);
10292 if (!ent->is_indirect
10293 && ent->got.offset != (bfd_vma) -1)
10294 {
10295 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10296 {
10297 if (!is_ppc64_elf (ibfd2))
10298 continue;
10299
10300 ent2 = ppc64_tlsld_got (ibfd2);
10301 if (!ent2->is_indirect
10302 && ent2->got.offset != (bfd_vma) -1
10303 && elf_gp (ibfd2) == elf_gp (ibfd))
10304 {
10305 ent2->is_indirect = TRUE;
10306 ent2->got.ent = ent;
10307 }
10308 }
10309 }
10310 }
10311
10312 /* Zap sizes of got sections. */
10313 htab->reliplt->rawsize = htab->reliplt->size;
10314 htab->reliplt->size -= htab->got_reli_size;
10315 htab->got_reli_size = 0;
10316
10317 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10318 {
10319 asection *got, *relgot;
10320
10321 if (!is_ppc64_elf (ibfd))
10322 continue;
10323
10324 got = ppc64_elf_tdata (ibfd)->got;
10325 if (got != NULL)
10326 {
10327 got->rawsize = got->size;
10328 got->size = 0;
10329 relgot = ppc64_elf_tdata (ibfd)->relgot;
10330 relgot->rawsize = relgot->size;
10331 relgot->size = 0;
10332 }
10333 }
10334
10335 /* Now reallocate the got, local syms first. We don't need to
10336 allocate section contents again since we never increase size. */
10337 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10338 {
10339 struct got_entry **lgot_ents;
10340 struct got_entry **end_lgot_ents;
10341 struct plt_entry **local_plt;
10342 struct plt_entry **end_local_plt;
10343 unsigned char *lgot_masks;
10344 bfd_size_type locsymcount;
10345 Elf_Internal_Shdr *symtab_hdr;
10346 asection *s, *srel;
10347
10348 if (!is_ppc64_elf (ibfd))
10349 continue;
10350
10351 lgot_ents = elf_local_got_ents (ibfd);
10352 if (!lgot_ents)
10353 continue;
10354
10355 symtab_hdr = &elf_symtab_hdr (ibfd);
10356 locsymcount = symtab_hdr->sh_info;
10357 end_lgot_ents = lgot_ents + locsymcount;
10358 local_plt = (struct plt_entry **) end_lgot_ents;
10359 end_local_plt = local_plt + locsymcount;
10360 lgot_masks = (unsigned char *) end_local_plt;
10361 s = ppc64_elf_tdata (ibfd)->got;
10362 srel = ppc64_elf_tdata (ibfd)->relgot;
10363 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10364 {
10365 struct got_entry *ent;
10366
10367 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10368 {
10369 unsigned int num = 1;
10370 ent->got.offset = s->size;
10371 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10372 num = 2;
10373 s->size += num * 8;
10374 if (info->shared)
10375 srel->size += num * sizeof (Elf64_External_Rela);
10376 else if ((*lgot_masks & PLT_IFUNC) != 0)
10377 {
10378 htab->reliplt->size
10379 += num * sizeof (Elf64_External_Rela);
10380 htab->got_reli_size
10381 += num * sizeof (Elf64_External_Rela);
10382 }
10383 }
10384 }
10385 }
10386
10387 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10388
10389 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10390 {
10391 struct got_entry *ent;
10392
10393 if (!is_ppc64_elf (ibfd))
10394 continue;
10395
10396 ent = ppc64_tlsld_got (ibfd);
10397 if (!ent->is_indirect
10398 && ent->got.offset != (bfd_vma) -1)
10399 {
10400 asection *s = ppc64_elf_tdata (ibfd)->got;
10401 ent->got.offset = s->size;
10402 s->size += 16;
10403 if (info->shared)
10404 {
10405 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10406 srel->size += sizeof (Elf64_External_Rela);
10407 }
10408 }
10409 }
10410
10411 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10412 if (!done_something)
10413 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10414 {
10415 asection *got;
10416
10417 if (!is_ppc64_elf (ibfd))
10418 continue;
10419
10420 got = ppc64_elf_tdata (ibfd)->got;
10421 if (got != NULL)
10422 {
10423 done_something = got->rawsize != got->size;
10424 if (done_something)
10425 break;
10426 }
10427 }
10428
10429 if (done_something)
10430 (*htab->layout_sections_again) ();
10431
10432 /* Set up for second pass over toc sections to recalculate elf_gp
10433 on input sections. */
10434 htab->toc_bfd = NULL;
10435 htab->toc_first_sec = NULL;
10436 htab->second_toc_pass = TRUE;
10437 return done_something;
10438}
10439
10440/* Called after second pass of multitoc partitioning. */
10441
10442void
10443ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10444{
10445 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10446
10447 /* After the second pass, toc_curr tracks the TOC offset used
10448 for code sections below in ppc64_elf_next_input_section. */
10449 htab->toc_curr = TOC_BASE_OFF;
10450}
10451
10452/* No toc references were found in ISEC. If the code in ISEC makes no
10453 calls, then there's no need to use toc adjusting stubs when branching
10454 into ISEC. Actually, indirect calls from ISEC are OK as they will
10455 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10456 needed, and 2 if a cyclical call-graph was found but no other reason
10457 for a stub was detected. If called from the top level, a return of
10458 2 means the same as a return of 0. */
10459
10460static int
10461toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10462{
10463 int ret;
10464
10465 /* Mark this section as checked. */
10466 isec->call_check_done = 1;
10467
10468 /* We know none of our code bearing sections will need toc stubs. */
10469 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10470 return 0;
10471
10472 if (isec->size == 0)
10473 return 0;
10474
10475 if (isec->output_section == NULL)
10476 return 0;
10477
10478 ret = 0;
10479 if (isec->reloc_count != 0)
10480 {
10481 Elf_Internal_Rela *relstart, *rel;
10482 Elf_Internal_Sym *local_syms;
10483 struct ppc_link_hash_table *htab;
10484
10485 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10486 info->keep_memory);
10487 if (relstart == NULL)
10488 return -1;
10489
10490 /* Look for branches to outside of this section. */
10491 local_syms = NULL;
10492 htab = ppc_hash_table (info);
10493 if (htab == NULL)
10494 return -1;
10495
10496 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10497 {
10498 enum elf_ppc64_reloc_type r_type;
10499 unsigned long r_symndx;
10500 struct elf_link_hash_entry *h;
10501 struct ppc_link_hash_entry *eh;
10502 Elf_Internal_Sym *sym;
10503 asection *sym_sec;
10504 struct _opd_sec_data *opd;
10505 bfd_vma sym_value;
10506 bfd_vma dest;
10507
10508 r_type = ELF64_R_TYPE (rel->r_info);
10509 if (r_type != R_PPC64_REL24
10510 && r_type != R_PPC64_REL14
10511 && r_type != R_PPC64_REL14_BRTAKEN
10512 && r_type != R_PPC64_REL14_BRNTAKEN)
10513 continue;
10514
10515 r_symndx = ELF64_R_SYM (rel->r_info);
10516 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10517 isec->owner))
10518 {
10519 ret = -1;
10520 break;
10521 }
10522
10523 /* Calls to dynamic lib functions go through a plt call stub
10524 that uses r2. */
10525 eh = (struct ppc_link_hash_entry *) h;
10526 if (eh != NULL
10527 && (eh->elf.plt.plist != NULL
10528 || (eh->oh != NULL
10529 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10530 {
10531 ret = 1;
10532 break;
10533 }
10534
10535 if (sym_sec == NULL)
10536 /* Ignore other undefined symbols. */
10537 continue;
10538
10539 /* Assume branches to other sections not included in the
10540 link need stubs too, to cover -R and absolute syms. */
10541 if (sym_sec->output_section == NULL)
10542 {
10543 ret = 1;
10544 break;
10545 }
10546
10547 if (h == NULL)
10548 sym_value = sym->st_value;
10549 else
10550 {
10551 if (h->root.type != bfd_link_hash_defined
10552 && h->root.type != bfd_link_hash_defweak)
10553 abort ();
10554 sym_value = h->root.u.def.value;
10555 }
10556 sym_value += rel->r_addend;
10557
10558 /* If this branch reloc uses an opd sym, find the code section. */
10559 opd = get_opd_info (sym_sec);
10560 if (opd != NULL)
10561 {
10562 if (h == NULL && opd->adjust != NULL)
10563 {
10564 long adjust;
10565
10566 adjust = opd->adjust[sym->st_value / 8];
10567 if (adjust == -1)
10568 /* Assume deleted functions won't ever be called. */
10569 continue;
10570 sym_value += adjust;
10571 }
10572
10573 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10574 if (dest == (bfd_vma) -1)
10575 continue;
10576 }
10577 else
10578 dest = (sym_value
10579 + sym_sec->output_offset
10580 + sym_sec->output_section->vma);
10581
10582 /* Ignore branch to self. */
10583 if (sym_sec == isec)
10584 continue;
10585
10586 /* If the called function uses the toc, we need a stub. */
10587 if (sym_sec->has_toc_reloc
10588 || sym_sec->makes_toc_func_call)
10589 {
10590 ret = 1;
10591 break;
10592 }
10593
10594 /* Assume any branch that needs a long branch stub might in fact
10595 need a plt_branch stub. A plt_branch stub uses r2. */
10596 else if (dest - (isec->output_offset
10597 + isec->output_section->vma
10598 + rel->r_offset) + (1 << 25) >= (2 << 25))
10599 {
10600 ret = 1;
10601 break;
10602 }
10603
10604 /* If calling back to a section in the process of being
10605 tested, we can't say for sure that no toc adjusting stubs
10606 are needed, so don't return zero. */
10607 else if (sym_sec->call_check_in_progress)
10608 ret = 2;
10609
10610 /* Branches to another section that itself doesn't have any TOC
10611 references are OK. Recursively call ourselves to check. */
10612 else if (!sym_sec->call_check_done)
10613 {
10614 int recur;
10615
10616 /* Mark current section as indeterminate, so that other
10617 sections that call back to current won't be marked as
10618 known. */
10619 isec->call_check_in_progress = 1;
10620 recur = toc_adjusting_stub_needed (info, sym_sec);
10621 isec->call_check_in_progress = 0;
10622
10623 if (recur != 0)
10624 {
10625 ret = recur;
10626 if (recur != 2)
10627 break;
10628 }
10629 }
10630 }
10631
10632 if (local_syms != NULL
10633 && (elf_symtab_hdr (isec->owner).contents
10634 != (unsigned char *) local_syms))
10635 free (local_syms);
10636 if (elf_section_data (isec)->relocs != relstart)
10637 free (relstart);
10638 }
10639
10640 if ((ret & 1) == 0
10641 && isec->map_head.s != NULL
10642 && (strcmp (isec->output_section->name, ".init") == 0
10643 || strcmp (isec->output_section->name, ".fini") == 0))
10644 {
10645 if (isec->map_head.s->has_toc_reloc
10646 || isec->map_head.s->makes_toc_func_call)
10647 ret = 1;
10648 else if (!isec->map_head.s->call_check_done)
10649 {
10650 int recur;
10651 isec->call_check_in_progress = 1;
10652 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10653 isec->call_check_in_progress = 0;
10654 if (recur != 0)
10655 ret = recur;
10656 }
10657 }
10658
10659 if (ret == 1)
10660 isec->makes_toc_func_call = 1;
10661
10662 return ret;
10663}
10664
10665/* The linker repeatedly calls this function for each input section,
10666 in the order that input sections are linked into output sections.
10667 Build lists of input sections to determine groupings between which
10668 we may insert linker stubs. */
10669
10670bfd_boolean
10671ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10672{
10673 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10674
10675 if (htab == NULL)
10676 return FALSE;
10677
10678 if ((isec->output_section->flags & SEC_CODE) != 0
10679 && isec->output_section->index <= htab->top_index)
10680 {
10681 asection **list = htab->input_list + isec->output_section->index;
10682 /* Steal the link_sec pointer for our list. */
10683#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10684 /* This happens to make the list in reverse order,
10685 which is what we want. */
10686 PREV_SEC (isec) = *list;
10687 *list = isec;
10688 }
10689
10690 if (htab->multi_toc_needed)
10691 {
10692 /* If a code section has a function that uses the TOC then we need
10693 to use the right TOC (obviously). Also, make sure that .opd gets
10694 the correct TOC value for R_PPC64_TOC relocs that don't have or
10695 can't find their function symbol (shouldn't ever happen now).
10696 Also specially treat .fixup for the linux kernel. .fixup
10697 contains branches, but only back to the function that hit an
10698 exception. */
10699 if (isec->has_toc_reloc
10700 || (isec->flags & SEC_CODE) == 0
10701 || strcmp (isec->name, ".fixup") == 0)
10702 {
10703 if (elf_gp (isec->owner) != 0)
10704 htab->toc_curr = elf_gp (isec->owner);
10705 }
10706 else
10707 {
10708 if (!isec->call_check_done
10709 && toc_adjusting_stub_needed (info, isec) < 0)
10710 return FALSE;
10711 /* If we make a local call from this section, ie. a branch
10712 without a following nop, then we have no place to put a
10713 toc restoring insn. We must use the same toc group as
10714 the callee.
10715 Testing makes_toc_func_call actually tests for *any*
10716 calls to functions that need a good toc pointer. A more
10717 precise test would be better, as this one will set
10718 incorrect values for pasted .init/.fini fragments.
10719 (Fixed later in check_pasted_section.) */
10720 if (isec->makes_toc_func_call
10721 && elf_gp (isec->owner) != 0)
10722 htab->toc_curr = elf_gp (isec->owner);
10723 }
10724 }
10725
10726 /* Functions that don't use the TOC can belong in any TOC group.
10727 Use the last TOC base. */
10728 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10729 return TRUE;
10730}
10731
10732/* Check that all .init and .fini sections use the same toc, if they
10733 have toc relocs. */
10734
10735static bfd_boolean
10736check_pasted_section (struct bfd_link_info *info, const char *name)
10737{
10738 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10739
10740 if (o != NULL)
10741 {
10742 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10743 bfd_vma toc_off = 0;
10744 asection *i;
10745
10746 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10747 if (i->has_toc_reloc)
10748 {
10749 if (toc_off == 0)
10750 toc_off = htab->stub_group[i->id].toc_off;
10751 else if (toc_off != htab->stub_group[i->id].toc_off)
10752 return FALSE;
10753 }
10754
10755 if (toc_off == 0)
10756 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10757 if (i->makes_toc_func_call)
10758 {
10759 toc_off = htab->stub_group[i->id].toc_off;
10760 break;
10761 }
10762
10763 /* Make sure the whole pasted function uses the same toc offset. */
10764 if (toc_off != 0)
10765 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10766 htab->stub_group[i->id].toc_off = toc_off;
10767 }
10768 return TRUE;
10769}
10770
10771bfd_boolean
10772ppc64_elf_check_init_fini (struct bfd_link_info *info)
10773{
10774 return (check_pasted_section (info, ".init")
10775 & check_pasted_section (info, ".fini"));
10776}
10777
10778/* See whether we can group stub sections together. Grouping stub
10779 sections may result in fewer stubs. More importantly, we need to
10780 put all .init* and .fini* stubs at the beginning of the .init or
10781 .fini output sections respectively, because glibc splits the
10782 _init and _fini functions into multiple parts. Putting a stub in
10783 the middle of a function is not a good idea. */
10784
10785static void
10786group_sections (struct ppc_link_hash_table *htab,
10787 bfd_size_type stub_group_size,
10788 bfd_boolean stubs_always_before_branch)
10789{
10790 asection **list;
10791 bfd_size_type stub14_group_size;
10792 bfd_boolean suppress_size_errors;
10793
10794 suppress_size_errors = FALSE;
10795 stub14_group_size = stub_group_size;
10796 if (stub_group_size == 1)
10797 {
10798 /* Default values. */
10799 if (stubs_always_before_branch)
10800 {
10801 stub_group_size = 0x1e00000;
10802 stub14_group_size = 0x7800;
10803 }
10804 else
10805 {
10806 stub_group_size = 0x1c00000;
10807 stub14_group_size = 0x7000;
10808 }
10809 suppress_size_errors = TRUE;
10810 }
10811
10812 list = htab->input_list + htab->top_index;
10813 do
10814 {
10815 asection *tail = *list;
10816 while (tail != NULL)
10817 {
10818 asection *curr;
10819 asection *prev;
10820 bfd_size_type total;
10821 bfd_boolean big_sec;
10822 bfd_vma curr_toc;
10823
10824 curr = tail;
10825 total = tail->size;
10826 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10827 && ppc64_elf_section_data (tail)->has_14bit_branch
10828 ? stub14_group_size : stub_group_size);
10829 if (big_sec && !suppress_size_errors)
10830 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10831 tail->owner, tail);
10832 curr_toc = htab->stub_group[tail->id].toc_off;
10833
10834 while ((prev = PREV_SEC (curr)) != NULL
10835 && ((total += curr->output_offset - prev->output_offset)
10836 < (ppc64_elf_section_data (prev) != NULL
10837 && ppc64_elf_section_data (prev)->has_14bit_branch
10838 ? stub14_group_size : stub_group_size))
10839 && htab->stub_group[prev->id].toc_off == curr_toc)
10840 curr = prev;
10841
10842 /* OK, the size from the start of CURR to the end is less
10843 than stub_group_size and thus can be handled by one stub
10844 section. (or the tail section is itself larger than
10845 stub_group_size, in which case we may be toast.) We
10846 should really be keeping track of the total size of stubs
10847 added here, as stubs contribute to the final output
10848 section size. That's a little tricky, and this way will
10849 only break if stubs added make the total size more than
10850 2^25, ie. for the default stub_group_size, if stubs total
10851 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10852 do
10853 {
10854 prev = PREV_SEC (tail);
10855 /* Set up this stub group. */
10856 htab->stub_group[tail->id].link_sec = curr;
10857 }
10858 while (tail != curr && (tail = prev) != NULL);
10859
10860 /* But wait, there's more! Input sections up to stub_group_size
10861 bytes before the stub section can be handled by it too.
10862 Don't do this if we have a really large section after the
10863 stubs, as adding more stubs increases the chance that
10864 branches may not reach into the stub section. */
10865 if (!stubs_always_before_branch && !big_sec)
10866 {
10867 total = 0;
10868 while (prev != NULL
10869 && ((total += tail->output_offset - prev->output_offset)
10870 < (ppc64_elf_section_data (prev) != NULL
10871 && ppc64_elf_section_data (prev)->has_14bit_branch
10872 ? stub14_group_size : stub_group_size))
10873 && htab->stub_group[prev->id].toc_off == curr_toc)
10874 {
10875 tail = prev;
10876 prev = PREV_SEC (tail);
10877 htab->stub_group[tail->id].link_sec = curr;
10878 }
10879 }
10880 tail = prev;
10881 }
10882 }
10883 while (list-- != htab->input_list);
10884 free (htab->input_list);
10885#undef PREV_SEC
10886}
10887
10888/* Determine and set the size of the stub section for a final link.
10889
10890 The basic idea here is to examine all the relocations looking for
10891 PC-relative calls to a target that is unreachable with a "bl"
10892 instruction. */
10893
10894bfd_boolean
10895ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10896{
10897 bfd_size_type stub_group_size;
10898 bfd_boolean stubs_always_before_branch;
10899 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10900
10901 if (htab == NULL)
10902 return FALSE;
10903
10904 stubs_always_before_branch = group_size < 0;
10905 if (group_size < 0)
10906 stub_group_size = -group_size;
10907 else
10908 stub_group_size = group_size;
10909
10910 group_sections (htab, stub_group_size, stubs_always_before_branch);
10911
10912 while (1)
10913 {
10914 bfd *input_bfd;
10915 unsigned int bfd_indx;
10916 asection *stub_sec;
10917
10918 htab->stub_iteration += 1;
10919
10920 for (input_bfd = info->input_bfds, bfd_indx = 0;
10921 input_bfd != NULL;
10922 input_bfd = input_bfd->link_next, bfd_indx++)
10923 {
10924 Elf_Internal_Shdr *symtab_hdr;
10925 asection *section;
10926 Elf_Internal_Sym *local_syms = NULL;
10927
10928 if (!is_ppc64_elf (input_bfd))
10929 continue;
10930
10931 /* We'll need the symbol table in a second. */
10932 symtab_hdr = &elf_symtab_hdr (input_bfd);
10933 if (symtab_hdr->sh_info == 0)
10934 continue;
10935
10936 /* Walk over each section attached to the input bfd. */
10937 for (section = input_bfd->sections;
10938 section != NULL;
10939 section = section->next)
10940 {
10941 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10942
10943 /* If there aren't any relocs, then there's nothing more
10944 to do. */
10945 if ((section->flags & SEC_RELOC) == 0
10946 || (section->flags & SEC_ALLOC) == 0
10947 || (section->flags & SEC_LOAD) == 0
10948 || (section->flags & SEC_CODE) == 0
10949 || section->reloc_count == 0)
10950 continue;
10951
10952 /* If this section is a link-once section that will be
10953 discarded, then don't create any stubs. */
10954 if (section->output_section == NULL
10955 || section->output_section->owner != info->output_bfd)
10956 continue;
10957
10958 /* Get the relocs. */
10959 internal_relocs
10960 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10961 info->keep_memory);
10962 if (internal_relocs == NULL)
10963 goto error_ret_free_local;
10964
10965 /* Now examine each relocation. */
10966 irela = internal_relocs;
10967 irelaend = irela + section->reloc_count;
10968 for (; irela < irelaend; irela++)
10969 {
10970 enum elf_ppc64_reloc_type r_type;
10971 unsigned int r_indx;
10972 enum ppc_stub_type stub_type;
10973 struct ppc_stub_hash_entry *stub_entry;
10974 asection *sym_sec, *code_sec;
10975 bfd_vma sym_value, code_value;
10976 bfd_vma destination;
10977 bfd_boolean ok_dest;
10978 struct ppc_link_hash_entry *hash;
10979 struct ppc_link_hash_entry *fdh;
10980 struct elf_link_hash_entry *h;
10981 Elf_Internal_Sym *sym;
10982 char *stub_name;
10983 const asection *id_sec;
10984 struct _opd_sec_data *opd;
10985 struct plt_entry *plt_ent;
10986
10987 r_type = ELF64_R_TYPE (irela->r_info);
10988 r_indx = ELF64_R_SYM (irela->r_info);
10989
10990 if (r_type >= R_PPC64_max)
10991 {
10992 bfd_set_error (bfd_error_bad_value);
10993 goto error_ret_free_internal;
10994 }
10995
10996 /* Only look for stubs on branch instructions. */
10997 if (r_type != R_PPC64_REL24
10998 && r_type != R_PPC64_REL14
10999 && r_type != R_PPC64_REL14_BRTAKEN
11000 && r_type != R_PPC64_REL14_BRNTAKEN)
11001 continue;
11002
11003 /* Now determine the call target, its name, value,
11004 section. */
11005 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11006 r_indx, input_bfd))
11007 goto error_ret_free_internal;
11008 hash = (struct ppc_link_hash_entry *) h;
11009
11010 ok_dest = FALSE;
11011 fdh = NULL;
11012 sym_value = 0;
11013 if (hash == NULL)
11014 {
11015 sym_value = sym->st_value;
11016 ok_dest = TRUE;
11017 }
11018 else if (hash->elf.root.type == bfd_link_hash_defined
11019 || hash->elf.root.type == bfd_link_hash_defweak)
11020 {
11021 sym_value = hash->elf.root.u.def.value;
11022 if (sym_sec->output_section != NULL)
11023 ok_dest = TRUE;
11024 }
11025 else if (hash->elf.root.type == bfd_link_hash_undefweak
11026 || hash->elf.root.type == bfd_link_hash_undefined)
11027 {
11028 /* Recognise an old ABI func code entry sym, and
11029 use the func descriptor sym instead if it is
11030 defined. */
11031 if (hash->elf.root.root.string[0] == '.'
11032 && (fdh = lookup_fdh (hash, htab)) != NULL)
11033 {
11034 if (fdh->elf.root.type == bfd_link_hash_defined
11035 || fdh->elf.root.type == bfd_link_hash_defweak)
11036 {
11037 sym_sec = fdh->elf.root.u.def.section;
11038 sym_value = fdh->elf.root.u.def.value;
11039 if (sym_sec->output_section != NULL)
11040 ok_dest = TRUE;
11041 }
11042 else
11043 fdh = NULL;
11044 }
11045 }
11046 else
11047 {
11048 bfd_set_error (bfd_error_bad_value);
11049 goto error_ret_free_internal;
11050 }
11051
11052 destination = 0;
11053 if (ok_dest)
11054 {
11055 sym_value += irela->r_addend;
11056 destination = (sym_value
11057 + sym_sec->output_offset
11058 + sym_sec->output_section->vma);
11059 }
11060
11061 code_sec = sym_sec;
11062 code_value = sym_value;
11063 opd = get_opd_info (sym_sec);
11064 if (opd != NULL)
11065 {
11066 bfd_vma dest;
11067
11068 if (hash == NULL && opd->adjust != NULL)
11069 {
11070 long adjust = opd->adjust[sym_value / 8];
11071 if (adjust == -1)
11072 continue;
11073 code_value += adjust;
11074 sym_value += adjust;
11075 }
11076 dest = opd_entry_value (sym_sec, sym_value,
11077 &code_sec, &code_value);
11078 if (dest != (bfd_vma) -1)
11079 {
11080 destination = dest;
11081 if (fdh != NULL)
11082 {
11083 /* Fixup old ABI sym to point at code
11084 entry. */
11085 hash->elf.root.type = bfd_link_hash_defweak;
11086 hash->elf.root.u.def.section = code_sec;
11087 hash->elf.root.u.def.value = code_value;
11088 }
11089 }
11090 }
11091
11092 /* Determine what (if any) linker stub is needed. */
11093 plt_ent = NULL;
11094 stub_type = ppc_type_of_stub (section, irela, &hash,
11095 &plt_ent, destination);
11096
11097 if (stub_type != ppc_stub_plt_call)
11098 {
11099 /* Check whether we need a TOC adjusting stub.
11100 Since the linker pastes together pieces from
11101 different object files when creating the
11102 _init and _fini functions, it may be that a
11103 call to what looks like a local sym is in
11104 fact a call needing a TOC adjustment. */
11105 if (code_sec != NULL
11106 && code_sec->output_section != NULL
11107 && (htab->stub_group[code_sec->id].toc_off
11108 != htab->stub_group[section->id].toc_off)
11109 && (code_sec->has_toc_reloc
11110 || code_sec->makes_toc_func_call))
11111 stub_type = ppc_stub_long_branch_r2off;
11112 }
11113
11114 if (stub_type == ppc_stub_none)
11115 continue;
11116
11117 /* __tls_get_addr calls might be eliminated. */
11118 if (stub_type != ppc_stub_plt_call
11119 && hash != NULL
11120 && (hash == htab->tls_get_addr
11121 || hash == htab->tls_get_addr_fd)
11122 && section->has_tls_reloc
11123 && irela != internal_relocs)
11124 {
11125 /* Get tls info. */
11126 unsigned char *tls_mask;
11127
11128 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11129 irela - 1, input_bfd))
11130 goto error_ret_free_internal;
11131 if (*tls_mask != 0)
11132 continue;
11133 }
11134
11135 /* Support for grouping stub sections. */
11136 id_sec = htab->stub_group[section->id].link_sec;
11137
11138 /* Get the name of this stub. */
11139 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11140 if (!stub_name)
11141 goto error_ret_free_internal;
11142
11143 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11144 stub_name, FALSE, FALSE);
11145 if (stub_entry != NULL)
11146 {
11147 /* The proper stub has already been created. */
11148 free (stub_name);
11149 continue;
11150 }
11151
11152 stub_entry = ppc_add_stub (stub_name, section, htab);
11153 if (stub_entry == NULL)
11154 {
11155 free (stub_name);
11156 error_ret_free_internal:
11157 if (elf_section_data (section)->relocs == NULL)
11158 free (internal_relocs);
11159 error_ret_free_local:
11160 if (local_syms != NULL
11161 && (symtab_hdr->contents
11162 != (unsigned char *) local_syms))
11163 free (local_syms);
11164 return FALSE;
11165 }
11166
11167 stub_entry->stub_type = stub_type;
11168 if (stub_type != ppc_stub_plt_call)
11169 {
11170 stub_entry->target_value = code_value;
11171 stub_entry->target_section = code_sec;
11172 }
11173 else
11174 {
11175 stub_entry->target_value = sym_value;
11176 stub_entry->target_section = sym_sec;
11177 }
11178 stub_entry->h = hash;
11179 stub_entry->plt_ent = plt_ent;
11180 stub_entry->addend = irela->r_addend;
11181
11182 if (stub_entry->h != NULL)
11183 htab->stub_globals += 1;
11184 }
11185
11186 /* We're done with the internal relocs, free them. */
11187 if (elf_section_data (section)->relocs != internal_relocs)
11188 free (internal_relocs);
11189 }
11190
11191 if (local_syms != NULL
11192 && symtab_hdr->contents != (unsigned char *) local_syms)
11193 {
11194 if (!info->keep_memory)
11195 free (local_syms);
11196 else
11197 symtab_hdr->contents = (unsigned char *) local_syms;
11198 }
11199 }
11200
11201 /* We may have added some stubs. Find out the new size of the
11202 stub sections. */
11203 for (stub_sec = htab->stub_bfd->sections;
11204 stub_sec != NULL;
11205 stub_sec = stub_sec->next)
11206 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11207 {
11208 stub_sec->rawsize = stub_sec->size;
11209 stub_sec->size = 0;
11210 stub_sec->reloc_count = 0;
11211 stub_sec->flags &= ~SEC_RELOC;
11212 }
11213
11214 htab->brlt->size = 0;
11215 htab->brlt->reloc_count = 0;
11216 htab->brlt->flags &= ~SEC_RELOC;
11217 if (htab->relbrlt != NULL)
11218 htab->relbrlt->size = 0;
11219
11220 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11221
11222 if (info->emitrelocations
11223 && htab->glink != NULL && htab->glink->size != 0)
11224 {
11225 htab->glink->reloc_count = 1;
11226 htab->glink->flags |= SEC_RELOC;
11227 }
11228
11229 for (stub_sec = htab->stub_bfd->sections;
11230 stub_sec != NULL;
11231 stub_sec = stub_sec->next)
11232 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11233 && stub_sec->rawsize != stub_sec->size)
11234 break;
11235
11236 /* Exit from this loop when no stubs have been added, and no stubs
11237 have changed size. */
11238 if (stub_sec == NULL)
11239 break;
11240
11241 /* Ask the linker to do its stuff. */
11242 (*htab->layout_sections_again) ();
11243 }
11244
11245 /* It would be nice to strip htab->brlt from the output if the
11246 section is empty, but it's too late. If we strip sections here,
11247 the dynamic symbol table is corrupted since the section symbol
11248 for the stripped section isn't written. */
11249
11250 return TRUE;
11251}
11252
11253/* Called after we have determined section placement. If sections
11254 move, we'll be called again. Provide a value for TOCstart. */
11255
11256bfd_vma
11257ppc64_elf_toc (bfd *obfd)
11258{
11259 asection *s;
11260 bfd_vma TOCstart;
11261
11262 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11263 order. The TOC starts where the first of these sections starts. */
11264 s = bfd_get_section_by_name (obfd, ".got");
11265 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11266 s = bfd_get_section_by_name (obfd, ".toc");
11267 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11268 s = bfd_get_section_by_name (obfd, ".tocbss");
11269 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11270 s = bfd_get_section_by_name (obfd, ".plt");
11271 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11272 {
11273 /* This may happen for
11274 o references to TOC base (SYM@toc / TOC[tc0]) without a
11275 .toc directive
11276 o bad linker script
11277 o --gc-sections and empty TOC sections
11278
11279 FIXME: Warn user? */
11280
11281 /* Look for a likely section. We probably won't even be
11282 using TOCstart. */
11283 for (s = obfd->sections; s != NULL; s = s->next)
11284 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11285 | SEC_EXCLUDE))
11286 == (SEC_ALLOC | SEC_SMALL_DATA))
11287 break;
11288 if (s == NULL)
11289 for (s = obfd->sections; s != NULL; s = s->next)
11290 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11291 == (SEC_ALLOC | SEC_SMALL_DATA))
11292 break;
11293 if (s == NULL)
11294 for (s = obfd->sections; s != NULL; s = s->next)
11295 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11296 == SEC_ALLOC)
11297 break;
11298 if (s == NULL)
11299 for (s = obfd->sections; s != NULL; s = s->next)
11300 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11301 break;
11302 }
11303
11304 TOCstart = 0;
11305 if (s != NULL)
11306 TOCstart = s->output_section->vma + s->output_offset;
11307
11308 return TOCstart;
11309}
11310
11311/* Build all the stubs associated with the current output file.
11312 The stubs are kept in a hash table attached to the main linker
11313 hash table. This function is called via gldelf64ppc_finish. */
11314
11315bfd_boolean
11316ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11317 struct bfd_link_info *info,
11318 char **stats)
11319{
11320 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11321 asection *stub_sec;
11322 bfd_byte *p;
11323 int stub_sec_count = 0;
11324
11325 if (htab == NULL)
11326 return FALSE;
11327
11328 htab->emit_stub_syms = emit_stub_syms;
11329
11330 /* Allocate memory to hold the linker stubs. */
11331 for (stub_sec = htab->stub_bfd->sections;
11332 stub_sec != NULL;
11333 stub_sec = stub_sec->next)
11334 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11335 && stub_sec->size != 0)
11336 {
11337 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11338 if (stub_sec->contents == NULL)
11339 return FALSE;
11340 /* We want to check that built size is the same as calculated
11341 size. rawsize is a convenient location to use. */
11342 stub_sec->rawsize = stub_sec->size;
11343 stub_sec->size = 0;
11344 }
11345
11346 if (htab->glink != NULL && htab->glink->size != 0)
11347 {
11348 unsigned int indx;
11349 bfd_vma plt0;
11350
11351 /* Build the .glink plt call stub. */
11352 if (htab->emit_stub_syms)
11353 {
11354 struct elf_link_hash_entry *h;
11355 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11356 TRUE, FALSE, FALSE);
11357 if (h == NULL)
11358 return FALSE;
11359 if (h->root.type == bfd_link_hash_new)
11360 {
11361 h->root.type = bfd_link_hash_defined;
11362 h->root.u.def.section = htab->glink;
11363 h->root.u.def.value = 8;
11364 h->ref_regular = 1;
11365 h->def_regular = 1;
11366 h->ref_regular_nonweak = 1;
11367 h->forced_local = 1;
11368 h->non_elf = 0;
11369 }
11370 }
11371 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11372 if (info->emitrelocations)
11373 {
11374 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11375 if (r == NULL)
11376 return FALSE;
11377 r->r_offset = (htab->glink->output_offset
11378 + htab->glink->output_section->vma);
11379 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11380 r->r_addend = plt0;
11381 }
11382 p = htab->glink->contents;
11383 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11384 bfd_put_64 (htab->glink->owner, plt0, p);
11385 p += 8;
11386 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11387 p += 4;
11388 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11389 p += 4;
11390 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11391 p += 4;
11392 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11393 p += 4;
11394 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11395 p += 4;
11396 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11397 p += 4;
11398 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11399 p += 4;
11400 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11401 p += 4;
11402 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11403 p += 4;
11404 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11405 p += 4;
11406 bfd_put_32 (htab->glink->owner, BCTR, p);
11407 p += 4;
11408 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11409 {
11410 bfd_put_32 (htab->glink->owner, NOP, p);
11411 p += 4;
11412 }
11413
11414 /* Build the .glink lazy link call stubs. */
11415 indx = 0;
11416 while (p < htab->glink->contents + htab->glink->size)
11417 {
11418 if (indx < 0x8000)
11419 {
11420 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11421 p += 4;
11422 }
11423 else
11424 {
11425 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11426 p += 4;
11427 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11428 p += 4;
11429 }
11430 bfd_put_32 (htab->glink->owner,
11431 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11432 indx++;
11433 p += 4;
11434 }
11435 htab->glink->rawsize = p - htab->glink->contents;
11436 }
11437
11438 if (htab->brlt->size != 0)
11439 {
11440 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11441 htab->brlt->size);
11442 if (htab->brlt->contents == NULL)
11443 return FALSE;
11444 }
11445 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11446 {
11447 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11448 htab->relbrlt->size);
11449 if (htab->relbrlt->contents == NULL)
11450 return FALSE;
11451 }
11452
11453 /* Build the stubs as directed by the stub hash table. */
11454 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11455
11456 if (htab->relbrlt != NULL)
11457 htab->relbrlt->reloc_count = 0;
11458
11459 for (stub_sec = htab->stub_bfd->sections;
11460 stub_sec != NULL;
11461 stub_sec = stub_sec->next)
11462 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11463 {
11464 stub_sec_count += 1;
11465 if (stub_sec->rawsize != stub_sec->size)
11466 break;
11467 }
11468
11469 if (stub_sec != NULL
11470 || htab->glink->rawsize != htab->glink->size)
11471 {
11472 htab->stub_error = TRUE;
11473 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11474 }
11475
11476 if (htab->stub_error)
11477 return FALSE;
11478
11479 if (stats != NULL)
11480 {
11481 *stats = bfd_malloc (500);
11482 if (*stats == NULL)
11483 return FALSE;
11484
11485 sprintf (*stats, _("linker stubs in %u group%s\n"
11486 " branch %lu\n"
11487 " toc adjust %lu\n"
11488 " long branch %lu\n"
11489 " long toc adj %lu\n"
11490 " plt call %lu"),
11491 stub_sec_count,
11492 stub_sec_count == 1 ? "" : "s",
11493 htab->stub_count[ppc_stub_long_branch - 1],
11494 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11495 htab->stub_count[ppc_stub_plt_branch - 1],
11496 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11497 htab->stub_count[ppc_stub_plt_call - 1]);
11498 }
11499 return TRUE;
11500}
11501
11502/* This function undoes the changes made by add_symbol_adjust. */
11503
11504static bfd_boolean
11505undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11506{
11507 struct ppc_link_hash_entry *eh;
11508
11509 if (h->root.type == bfd_link_hash_indirect)
11510 return TRUE;
11511
11512 if (h->root.type == bfd_link_hash_warning)
11513 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11514
11515 eh = (struct ppc_link_hash_entry *) h;
11516 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11517 return TRUE;
11518
11519 eh->elf.root.type = bfd_link_hash_undefined;
11520 return TRUE;
11521}
11522
11523void
11524ppc64_elf_restore_symbols (struct bfd_link_info *info)
11525{
11526 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11527
11528 if (htab != NULL)
11529 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11530}
11531
11532/* What to do when ld finds relocations against symbols defined in
11533 discarded sections. */
11534
11535static unsigned int
11536ppc64_elf_action_discarded (asection *sec)
11537{
11538 if (strcmp (".opd", sec->name) == 0)
11539 return 0;
11540
11541 if (strcmp (".toc", sec->name) == 0)
11542 return 0;
11543
11544 if (strcmp (".toc1", sec->name) == 0)
11545 return 0;
11546
11547 return _bfd_elf_default_action_discarded (sec);
11548}
11549
11550/* REL points to a low-part reloc on a largetoc instruction sequence.
11551 Find the matching high-part reloc instruction and verify that it
11552 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11553 the high-part reloc. */
11554
11555static const Elf_Internal_Rela *
11556ha_reloc_match (const Elf_Internal_Rela *relocs,
11557 const Elf_Internal_Rela *rel,
11558 unsigned int *reg,
11559 bfd_boolean match_addend,
11560 const bfd *input_bfd,
11561 const bfd_byte *contents)
11562{
11563 enum elf_ppc64_reloc_type r_type, r_type_ha;
11564 bfd_vma r_info_ha, r_addend;
11565
11566 r_type = ELF64_R_TYPE (rel->r_info);
11567 switch (r_type)
11568 {
11569 case R_PPC64_GOT_TLSLD16_LO:
11570 case R_PPC64_GOT_TLSGD16_LO:
11571 case R_PPC64_GOT_TPREL16_LO_DS:
11572 case R_PPC64_GOT_DTPREL16_LO_DS:
11573 case R_PPC64_GOT16_LO:
11574 case R_PPC64_TOC16_LO:
11575 r_type_ha = r_type + 2;
11576 break;
11577 case R_PPC64_GOT16_LO_DS:
11578 r_type_ha = R_PPC64_GOT16_HA;
11579 break;
11580 case R_PPC64_TOC16_LO_DS:
11581 r_type_ha = R_PPC64_TOC16_HA;
11582 break;
11583 default:
11584 abort ();
11585 }
11586 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11587 r_addend = rel->r_addend;
11588
11589 while (--rel >= relocs)
11590 if (rel->r_info == r_info_ha
11591 && (!match_addend
11592 || rel->r_addend == r_addend))
11593 {
11594 const bfd_byte *p = contents + (rel->r_offset & ~3);
11595 unsigned int insn = bfd_get_32 (input_bfd, p);
11596 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11597 && (insn & (0x1f << 21)) == (*reg << 21))
11598 {
11599 *reg = (insn >> 16) & 0x1f;
11600 return rel;
11601 }
11602 break;
11603 }
11604 return NULL;
11605}
11606
11607/* The RELOCATE_SECTION function is called by the ELF backend linker
11608 to handle the relocations for a section.
11609
11610 The relocs are always passed as Rela structures; if the section
11611 actually uses Rel structures, the r_addend field will always be
11612 zero.
11613
11614 This function is responsible for adjust the section contents as
11615 necessary, and (if using Rela relocs and generating a
11616 relocatable output file) adjusting the reloc addend as
11617 necessary.
11618
11619 This function does not have to worry about setting the reloc
11620 address or the reloc symbol index.
11621
11622 LOCAL_SYMS is a pointer to the swapped in local symbols.
11623
11624 LOCAL_SECTIONS is an array giving the section in the input file
11625 corresponding to the st_shndx field of each local symbol.
11626
11627 The global hash table entry for the global symbols can be found
11628 via elf_sym_hashes (input_bfd).
11629
11630 When generating relocatable output, this function must handle
11631 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11632 going to be the section symbol corresponding to the output
11633 section, which means that the addend must be adjusted
11634 accordingly. */
11635
11636static bfd_boolean
11637ppc64_elf_relocate_section (bfd *output_bfd,
11638 struct bfd_link_info *info,
11639 bfd *input_bfd,
11640 asection *input_section,
11641 bfd_byte *contents,
11642 Elf_Internal_Rela *relocs,
11643 Elf_Internal_Sym *local_syms,
11644 asection **local_sections)
11645{
11646 struct ppc_link_hash_table *htab;
11647 Elf_Internal_Shdr *symtab_hdr;
11648 struct elf_link_hash_entry **sym_hashes;
11649 Elf_Internal_Rela *rel;
11650 Elf_Internal_Rela *relend;
11651 Elf_Internal_Rela outrel;
11652 bfd_byte *loc;
11653 struct got_entry **local_got_ents;
11654 unsigned char *ha_opt;
11655 bfd_vma TOCstart;
11656 bfd_boolean no_ha_opt;
11657 bfd_boolean ret = TRUE;
11658 bfd_boolean is_opd;
11659 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11660 bfd_boolean is_power4 = FALSE;
11661 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11662
11663 /* Initialize howto table if needed. */
11664 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11665 ppc_howto_init ();
11666
11667 htab = ppc_hash_table (info);
11668 if (htab == NULL)
11669 return FALSE;
11670
11671 /* Don't relocate stub sections. */
11672 if (input_section->owner == htab->stub_bfd)
11673 return TRUE;
11674
11675 BFD_ASSERT (is_ppc64_elf (input_bfd));
11676
11677 local_got_ents = elf_local_got_ents (input_bfd);
11678 TOCstart = elf_gp (output_bfd);
11679 symtab_hdr = &elf_symtab_hdr (input_bfd);
11680 sym_hashes = elf_sym_hashes (input_bfd);
11681 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11682 ha_opt = NULL;
11683 no_ha_opt = FALSE;
11684
11685 rel = relocs;
11686 relend = relocs + input_section->reloc_count;
11687 for (; rel < relend; rel++)
11688 {
11689 enum elf_ppc64_reloc_type r_type;
11690 bfd_vma addend, orig_addend;
11691 bfd_reloc_status_type r;
11692 Elf_Internal_Sym *sym;
11693 asection *sec;
11694 struct elf_link_hash_entry *h_elf;
11695 struct ppc_link_hash_entry *h;
11696 struct ppc_link_hash_entry *fdh;
11697 const char *sym_name;
11698 unsigned long r_symndx, toc_symndx;
11699 bfd_vma toc_addend;
11700 unsigned char tls_mask, tls_gd, tls_type;
11701 unsigned char sym_type;
11702 bfd_vma relocation;
11703 bfd_boolean unresolved_reloc;
11704 bfd_boolean warned;
11705 unsigned int insn;
11706 unsigned int mask;
11707 struct ppc_stub_hash_entry *stub_entry;
11708 bfd_vma max_br_offset;
11709 bfd_vma from;
11710
11711 r_type = ELF64_R_TYPE (rel->r_info);
11712 r_symndx = ELF64_R_SYM (rel->r_info);
11713
11714 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11715 symbol of the previous ADDR64 reloc. The symbol gives us the
11716 proper TOC base to use. */
11717 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11718 && rel != relocs
11719 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11720 && is_opd)
11721 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11722
11723 sym = NULL;
11724 sec = NULL;
11725 h_elf = NULL;
11726 sym_name = NULL;
11727 unresolved_reloc = FALSE;
11728 warned = FALSE;
11729 orig_addend = rel->r_addend;
11730
11731 if (r_symndx < symtab_hdr->sh_info)
11732 {
11733 /* It's a local symbol. */
11734 struct _opd_sec_data *opd;
11735
11736 sym = local_syms + r_symndx;
11737 sec = local_sections[r_symndx];
11738 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11739 sym_type = ELF64_ST_TYPE (sym->st_info);
11740 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11741 opd = get_opd_info (sec);
11742 if (opd != NULL && opd->adjust != NULL)
11743 {
11744 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11745 if (adjust == -1)
11746 relocation = 0;
11747 else
11748 {
11749 /* If this is a relocation against the opd section sym
11750 and we have edited .opd, adjust the reloc addend so
11751 that ld -r and ld --emit-relocs output is correct.
11752 If it is a reloc against some other .opd symbol,
11753 then the symbol value will be adjusted later. */
11754 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11755 rel->r_addend += adjust;
11756 else
11757 relocation += adjust;
11758 }
11759 }
11760 }
11761 else
11762 {
11763 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11764 r_symndx, symtab_hdr, sym_hashes,
11765 h_elf, sec, relocation,
11766 unresolved_reloc, warned);
11767 sym_name = h_elf->root.root.string;
11768 sym_type = h_elf->type;
11769 }
11770 h = (struct ppc_link_hash_entry *) h_elf;
11771
11772 if (sec != NULL && elf_discarded_section (sec))
11773 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11774 rel, relend,
11775 ppc64_elf_howto_table[r_type],
11776 contents);
11777
11778 if (info->relocatable)
11779 continue;
11780
11781 /* TLS optimizations. Replace instruction sequences and relocs
11782 based on information we collected in tls_optimize. We edit
11783 RELOCS so that --emit-relocs will output something sensible
11784 for the final instruction stream. */
11785 tls_mask = 0;
11786 tls_gd = 0;
11787 toc_symndx = 0;
11788 if (h != NULL)
11789 tls_mask = h->tls_mask;
11790 else if (local_got_ents != NULL)
11791 {
11792 struct plt_entry **local_plt = (struct plt_entry **)
11793 (local_got_ents + symtab_hdr->sh_info);
11794 unsigned char *lgot_masks = (unsigned char *)
11795 (local_plt + symtab_hdr->sh_info);
11796 tls_mask = lgot_masks[r_symndx];
11797 }
11798 if (tls_mask == 0
11799 && (r_type == R_PPC64_TLS
11800 || r_type == R_PPC64_TLSGD
11801 || r_type == R_PPC64_TLSLD))
11802 {
11803 /* Check for toc tls entries. */
11804 unsigned char *toc_tls;
11805
11806 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11807 &local_syms, rel, input_bfd))
11808 return FALSE;
11809
11810 if (toc_tls)
11811 tls_mask = *toc_tls;
11812 }
11813
11814 /* Check that tls relocs are used with tls syms, and non-tls
11815 relocs are used with non-tls syms. */
11816 if (r_symndx != STN_UNDEF
11817 && r_type != R_PPC64_NONE
11818 && (h == NULL
11819 || h->elf.root.type == bfd_link_hash_defined
11820 || h->elf.root.type == bfd_link_hash_defweak)
11821 && (IS_PPC64_TLS_RELOC (r_type)
11822 != (sym_type == STT_TLS
11823 || (sym_type == STT_SECTION
11824 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11825 {
11826 if (tls_mask != 0
11827 && (r_type == R_PPC64_TLS
11828 || r_type == R_PPC64_TLSGD
11829 || r_type == R_PPC64_TLSLD))
11830 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11831 ;
11832 else
11833 (*_bfd_error_handler)
11834 (!IS_PPC64_TLS_RELOC (r_type)
11835 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11836 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11837 input_bfd,
11838 input_section,
11839 (long) rel->r_offset,
11840 ppc64_elf_howto_table[r_type]->name,
11841 sym_name);
11842 }
11843
11844 /* Ensure reloc mapping code below stays sane. */
11845 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11846 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11847 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11848 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11849 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11850 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11851 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11852 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11853 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11854 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11855 abort ();
11856
11857 switch (r_type)
11858 {
11859 default:
11860 break;
11861
11862 case R_PPC64_LO_DS_OPT:
11863 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11864 if ((insn & (0x3f << 26)) != 58u << 26)
11865 abort ();
11866 insn += (14u << 26) - (58u << 26);
11867 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11868 r_type = R_PPC64_TOC16_LO;
11869 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11870 break;
11871
11872 case R_PPC64_TOC16:
11873 case R_PPC64_TOC16_LO:
11874 case R_PPC64_TOC16_DS:
11875 case R_PPC64_TOC16_LO_DS:
11876 {
11877 /* Check for toc tls entries. */
11878 unsigned char *toc_tls;
11879 int retval;
11880
11881 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11882 &local_syms, rel, input_bfd);
11883 if (retval == 0)
11884 return FALSE;
11885
11886 if (toc_tls)
11887 {
11888 tls_mask = *toc_tls;
11889 if (r_type == R_PPC64_TOC16_DS
11890 || r_type == R_PPC64_TOC16_LO_DS)
11891 {
11892 if (tls_mask != 0
11893 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11894 goto toctprel;
11895 }
11896 else
11897 {
11898 /* If we found a GD reloc pair, then we might be
11899 doing a GD->IE transition. */
11900 if (retval == 2)
11901 {
11902 tls_gd = TLS_TPRELGD;
11903 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11904 goto tls_ldgd_opt;
11905 }
11906 else if (retval == 3)
11907 {
11908 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11909 goto tls_ldgd_opt;
11910 }
11911 }
11912 }
11913 }
11914 break;
11915
11916 case R_PPC64_GOT_TPREL16_HI:
11917 case R_PPC64_GOT_TPREL16_HA:
11918 if (tls_mask != 0
11919 && (tls_mask & TLS_TPREL) == 0)
11920 {
11921 rel->r_offset -= d_offset;
11922 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11923 r_type = R_PPC64_NONE;
11924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11925 }
11926 break;
11927
11928 case R_PPC64_GOT_TPREL16_DS:
11929 case R_PPC64_GOT_TPREL16_LO_DS:
11930 if (tls_mask != 0
11931 && (tls_mask & TLS_TPREL) == 0)
11932 {
11933 toctprel:
11934 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11935 insn &= 31 << 21;
11936 insn |= 0x3c0d0000; /* addis 0,13,0 */
11937 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11938 r_type = R_PPC64_TPREL16_HA;
11939 if (toc_symndx != 0)
11940 {
11941 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11942 rel->r_addend = toc_addend;
11943 /* We changed the symbol. Start over in order to
11944 get h, sym, sec etc. right. */
11945 rel--;
11946 continue;
11947 }
11948 else
11949 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11950 }
11951 break;
11952
11953 case R_PPC64_TLS:
11954 if (tls_mask != 0
11955 && (tls_mask & TLS_TPREL) == 0)
11956 {
11957 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11958 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11959 if (insn == 0)
11960 abort ();
11961 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11962 /* Was PPC64_TLS which sits on insn boundary, now
11963 PPC64_TPREL16_LO which is at low-order half-word. */
11964 rel->r_offset += d_offset;
11965 r_type = R_PPC64_TPREL16_LO;
11966 if (toc_symndx != 0)
11967 {
11968 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11969 rel->r_addend = toc_addend;
11970 /* We changed the symbol. Start over in order to
11971 get h, sym, sec etc. right. */
11972 rel--;
11973 continue;
11974 }
11975 else
11976 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11977 }
11978 break;
11979
11980 case R_PPC64_GOT_TLSGD16_HI:
11981 case R_PPC64_GOT_TLSGD16_HA:
11982 tls_gd = TLS_TPRELGD;
11983 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11984 goto tls_gdld_hi;
11985 break;
11986
11987 case R_PPC64_GOT_TLSLD16_HI:
11988 case R_PPC64_GOT_TLSLD16_HA:
11989 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11990 {
11991 tls_gdld_hi:
11992 if ((tls_mask & tls_gd) != 0)
11993 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11994 + R_PPC64_GOT_TPREL16_DS);
11995 else
11996 {
11997 rel->r_offset -= d_offset;
11998 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11999 r_type = R_PPC64_NONE;
12000 }
12001 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12002 }
12003 break;
12004
12005 case R_PPC64_GOT_TLSGD16:
12006 case R_PPC64_GOT_TLSGD16_LO:
12007 tls_gd = TLS_TPRELGD;
12008 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12009 goto tls_ldgd_opt;
12010 break;
12011
12012 case R_PPC64_GOT_TLSLD16:
12013 case R_PPC64_GOT_TLSLD16_LO:
12014 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12015 {
12016 unsigned int insn1, insn2, insn3;
12017 bfd_vma offset;
12018
12019 tls_ldgd_opt:
12020 offset = (bfd_vma) -1;
12021 /* If not using the newer R_PPC64_TLSGD/LD to mark
12022 __tls_get_addr calls, we must trust that the call
12023 stays with its arg setup insns, ie. that the next
12024 reloc is the __tls_get_addr call associated with
12025 the current reloc. Edit both insns. */
12026 if (input_section->has_tls_get_addr_call
12027 && rel + 1 < relend
12028 && branch_reloc_hash_match (input_bfd, rel + 1,
12029 htab->tls_get_addr,
12030 htab->tls_get_addr_fd))
12031 offset = rel[1].r_offset;
12032 if ((tls_mask & tls_gd) != 0)
12033 {
12034 /* IE */
12035 insn1 = bfd_get_32 (output_bfd,
12036 contents + rel->r_offset - d_offset);
12037 insn1 &= (1 << 26) - (1 << 2);
12038 insn1 |= 58 << 26; /* ld */
12039 insn2 = 0x7c636a14; /* add 3,3,13 */
12040 if (offset != (bfd_vma) -1)
12041 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12042 if ((tls_mask & TLS_EXPLICIT) == 0)
12043 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12044 + R_PPC64_GOT_TPREL16_DS);
12045 else
12046 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12047 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12048 }
12049 else
12050 {
12051 /* LE */
12052 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12053 insn2 = 0x38630000; /* addi 3,3,0 */
12054 if (tls_gd == 0)
12055 {
12056 /* Was an LD reloc. */
12057 if (toc_symndx)
12058 sec = local_sections[toc_symndx];
12059 for (r_symndx = 0;
12060 r_symndx < symtab_hdr->sh_info;
12061 r_symndx++)
12062 if (local_sections[r_symndx] == sec)
12063 break;
12064 if (r_symndx >= symtab_hdr->sh_info)
12065 r_symndx = STN_UNDEF;
12066 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12067 if (r_symndx != STN_UNDEF)
12068 rel->r_addend -= (local_syms[r_symndx].st_value
12069 + sec->output_offset
12070 + sec->output_section->vma);
12071 }
12072 else if (toc_symndx != 0)
12073 {
12074 r_symndx = toc_symndx;
12075 rel->r_addend = toc_addend;
12076 }
12077 r_type = R_PPC64_TPREL16_HA;
12078 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12079 if (offset != (bfd_vma) -1)
12080 {
12081 rel[1].r_info = ELF64_R_INFO (r_symndx,
12082 R_PPC64_TPREL16_LO);
12083 rel[1].r_offset = offset + d_offset;
12084 rel[1].r_addend = rel->r_addend;
12085 }
12086 }
12087 bfd_put_32 (output_bfd, insn1,
12088 contents + rel->r_offset - d_offset);
12089 if (offset != (bfd_vma) -1)
12090 {
12091 insn3 = bfd_get_32 (output_bfd,
12092 contents + offset + 4);
12093 if (insn3 == NOP
12094 || insn3 == CROR_151515 || insn3 == CROR_313131)
12095 {
12096 rel[1].r_offset += 4;
12097 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12098 insn2 = NOP;
12099 }
12100 bfd_put_32 (output_bfd, insn2, contents + offset);
12101 }
12102 if ((tls_mask & tls_gd) == 0
12103 && (tls_gd == 0 || toc_symndx != 0))
12104 {
12105 /* We changed the symbol. Start over in order
12106 to get h, sym, sec etc. right. */
12107 rel--;
12108 continue;
12109 }
12110 }
12111 break;
12112
12113 case R_PPC64_TLSGD:
12114 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12115 {
12116 unsigned int insn2, insn3;
12117 bfd_vma offset = rel->r_offset;
12118
12119 if ((tls_mask & TLS_TPRELGD) != 0)
12120 {
12121 /* IE */
12122 r_type = R_PPC64_NONE;
12123 insn2 = 0x7c636a14; /* add 3,3,13 */
12124 }
12125 else
12126 {
12127 /* LE */
12128 if (toc_symndx != 0)
12129 {
12130 r_symndx = toc_symndx;
12131 rel->r_addend = toc_addend;
12132 }
12133 r_type = R_PPC64_TPREL16_LO;
12134 rel->r_offset = offset + d_offset;
12135 insn2 = 0x38630000; /* addi 3,3,0 */
12136 }
12137 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12138 /* Zap the reloc on the _tls_get_addr call too. */
12139 BFD_ASSERT (offset == rel[1].r_offset);
12140 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12141 insn3 = bfd_get_32 (output_bfd,
12142 contents + offset + 4);
12143 if (insn3 == NOP
12144 || insn3 == CROR_151515 || insn3 == CROR_313131)
12145 {
12146 rel->r_offset += 4;
12147 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12148 insn2 = NOP;
12149 }
12150 bfd_put_32 (output_bfd, insn2, contents + offset);
12151 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12152 {
12153 rel--;
12154 continue;
12155 }
12156 }
12157 break;
12158
12159 case R_PPC64_TLSLD:
12160 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12161 {
12162 unsigned int insn2, insn3;
12163 bfd_vma offset = rel->r_offset;
12164
12165 if (toc_symndx)
12166 sec = local_sections[toc_symndx];
12167 for (r_symndx = 0;
12168 r_symndx < symtab_hdr->sh_info;
12169 r_symndx++)
12170 if (local_sections[r_symndx] == sec)
12171 break;
12172 if (r_symndx >= symtab_hdr->sh_info)
12173 r_symndx = STN_UNDEF;
12174 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12175 if (r_symndx != STN_UNDEF)
12176 rel->r_addend -= (local_syms[r_symndx].st_value
12177 + sec->output_offset
12178 + sec->output_section->vma);
12179
12180 r_type = R_PPC64_TPREL16_LO;
12181 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12182 rel->r_offset = offset + d_offset;
12183 /* Zap the reloc on the _tls_get_addr call too. */
12184 BFD_ASSERT (offset == rel[1].r_offset);
12185 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12186 insn2 = 0x38630000; /* addi 3,3,0 */
12187 insn3 = bfd_get_32 (output_bfd,
12188 contents + offset + 4);
12189 if (insn3 == NOP
12190 || insn3 == CROR_151515 || insn3 == CROR_313131)
12191 {
12192 rel->r_offset += 4;
12193 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12194 insn2 = NOP;
12195 }
12196 bfd_put_32 (output_bfd, insn2, contents + offset);
12197 rel--;
12198 continue;
12199 }
12200 break;
12201
12202 case R_PPC64_DTPMOD64:
12203 if (rel + 1 < relend
12204 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12205 && rel[1].r_offset == rel->r_offset + 8)
12206 {
12207 if ((tls_mask & TLS_GD) == 0)
12208 {
12209 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12210 if ((tls_mask & TLS_TPRELGD) != 0)
12211 r_type = R_PPC64_TPREL64;
12212 else
12213 {
12214 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12215 r_type = R_PPC64_NONE;
12216 }
12217 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12218 }
12219 }
12220 else
12221 {
12222 if ((tls_mask & TLS_LD) == 0)
12223 {
12224 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12225 r_type = R_PPC64_NONE;
12226 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12227 }
12228 }
12229 break;
12230
12231 case R_PPC64_TPREL64:
12232 if ((tls_mask & TLS_TPREL) == 0)
12233 {
12234 r_type = R_PPC64_NONE;
12235 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12236 }
12237 break;
12238 }
12239
12240 /* Handle other relocations that tweak non-addend part of insn. */
12241 insn = 0;
12242 max_br_offset = 1 << 25;
12243 addend = rel->r_addend;
12244 switch (r_type)
12245 {
12246 default:
12247 break;
12248
12249 /* Branch taken prediction relocations. */
12250 case R_PPC64_ADDR14_BRTAKEN:
12251 case R_PPC64_REL14_BRTAKEN:
12252 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12253 /* Fall thru. */
12254
12255 /* Branch not taken prediction relocations. */
12256 case R_PPC64_ADDR14_BRNTAKEN:
12257 case R_PPC64_REL14_BRNTAKEN:
12258 insn |= bfd_get_32 (output_bfd,
12259 contents + rel->r_offset) & ~(0x01 << 21);
12260 /* Fall thru. */
12261
12262 case R_PPC64_REL14:
12263 max_br_offset = 1 << 15;
12264 /* Fall thru. */
12265
12266 case R_PPC64_REL24:
12267 /* Calls to functions with a different TOC, such as calls to
12268 shared objects, need to alter the TOC pointer. This is
12269 done using a linkage stub. A REL24 branching to these
12270 linkage stubs needs to be followed by a nop, as the nop
12271 will be replaced with an instruction to restore the TOC
12272 base pointer. */
12273 fdh = h;
12274 if (h != NULL
12275 && h->oh != NULL
12276 && h->oh->is_func_descriptor)
12277 fdh = ppc_follow_link (h->oh);
12278 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12279 if (stub_entry != NULL
12280 && (stub_entry->stub_type == ppc_stub_plt_call
12281 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12282 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12283 {
12284 bfd_boolean can_plt_call = FALSE;
12285
12286 if (rel->r_offset + 8 <= input_section->size)
12287 {
12288 unsigned long nop;
12289 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12290 if (nop == NOP
12291 || nop == CROR_151515 || nop == CROR_313131)
12292 {
12293 if (h != NULL
12294 && (h == htab->tls_get_addr_fd
12295 || h == htab->tls_get_addr)
12296 && !htab->no_tls_get_addr_opt)
12297 {
12298 /* Special stub used, leave nop alone. */
12299 }
12300 else
12301 bfd_put_32 (input_bfd, LD_R2_40R1,
12302 contents + rel->r_offset + 4);
12303 can_plt_call = TRUE;
12304 }
12305 }
12306
12307 if (!can_plt_call)
12308 {
12309 if (stub_entry->stub_type == ppc_stub_plt_call)
12310 {
12311 /* If this is a plain branch rather than a branch
12312 and link, don't require a nop. However, don't
12313 allow tail calls in a shared library as they
12314 will result in r2 being corrupted. */
12315 unsigned long br;
12316 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12317 if (info->executable && (br & 1) == 0)
12318 can_plt_call = TRUE;
12319 else
12320 stub_entry = NULL;
12321 }
12322 else if (h != NULL
12323 && strcmp (h->elf.root.root.string,
12324 ".__libc_start_main") == 0)
12325 {
12326 /* Allow crt1 branch to go via a toc adjusting stub. */
12327 can_plt_call = TRUE;
12328 }
12329 else
12330 {
12331 if (strcmp (input_section->output_section->name,
12332 ".init") == 0
12333 || strcmp (input_section->output_section->name,
12334 ".fini") == 0)
12335 (*_bfd_error_handler)
12336 (_("%B(%A+0x%lx): automatic multiple TOCs "
12337 "not supported using your crt files; "
12338 "recompile with -mminimal-toc or upgrade gcc"),
12339 input_bfd,
12340 input_section,
12341 (long) rel->r_offset);
12342 else
12343 (*_bfd_error_handler)
12344 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12345 "does not allow automatic multiple TOCs; "
12346 "recompile with -mminimal-toc or "
12347 "-fno-optimize-sibling-calls, "
12348 "or make `%s' extern"),
12349 input_bfd,
12350 input_section,
12351 (long) rel->r_offset,
12352 sym_name,
12353 sym_name);
12354 bfd_set_error (bfd_error_bad_value);
12355 ret = FALSE;
12356 }
12357 }
12358
12359 if (can_plt_call
12360 && stub_entry->stub_type == ppc_stub_plt_call)
12361 unresolved_reloc = FALSE;
12362 }
12363
12364 if ((stub_entry == NULL
12365 || stub_entry->stub_type == ppc_stub_long_branch
12366 || stub_entry->stub_type == ppc_stub_plt_branch)
12367 && get_opd_info (sec) != NULL)
12368 {
12369 /* The branch destination is the value of the opd entry. */
12370 bfd_vma off = (relocation + addend
12371 - sec->output_section->vma
12372 - sec->output_offset);
12373 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12374 if (dest != (bfd_vma) -1)
12375 {
12376 relocation = dest;
12377 addend = 0;
12378 }
12379 }
12380
12381 /* If the branch is out of reach we ought to have a long
12382 branch stub. */
12383 from = (rel->r_offset
12384 + input_section->output_offset
12385 + input_section->output_section->vma);
12386
12387 if (stub_entry != NULL
12388 && (stub_entry->stub_type == ppc_stub_long_branch
12389 || stub_entry->stub_type == ppc_stub_plt_branch)
12390 && (r_type == R_PPC64_ADDR14_BRTAKEN
12391 || r_type == R_PPC64_ADDR14_BRNTAKEN
12392 || (relocation + addend - from + max_br_offset
12393 < 2 * max_br_offset)))
12394 /* Don't use the stub if this branch is in range. */
12395 stub_entry = NULL;
12396
12397 if (stub_entry != NULL)
12398 {
12399 /* Munge up the value and addend so that we call the stub
12400 rather than the procedure directly. */
12401 relocation = (stub_entry->stub_offset
12402 + stub_entry->stub_sec->output_offset
12403 + stub_entry->stub_sec->output_section->vma);
12404 addend = 0;
12405 }
12406
12407 if (insn != 0)
12408 {
12409 if (is_power4)
12410 {
12411 /* Set 'a' bit. This is 0b00010 in BO field for branch
12412 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12413 for branch on CTR insns (BO == 1a00t or 1a01t). */
12414 if ((insn & (0x14 << 21)) == (0x04 << 21))
12415 insn |= 0x02 << 21;
12416 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12417 insn |= 0x08 << 21;
12418 else
12419 break;
12420 }
12421 else
12422 {
12423 /* Invert 'y' bit if not the default. */
12424 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12425 insn ^= 0x01 << 21;
12426 }
12427
12428 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12429 }
12430
12431 /* NOP out calls to undefined weak functions.
12432 We can thus call a weak function without first
12433 checking whether the function is defined. */
12434 else if (h != NULL
12435 && h->elf.root.type == bfd_link_hash_undefweak
12436 && h->elf.dynindx == -1
12437 && r_type == R_PPC64_REL24
12438 && relocation == 0
12439 && addend == 0)
12440 {
12441 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12442 continue;
12443 }
12444 break;
12445 }
12446
12447 /* Set `addend'. */
12448 tls_type = 0;
12449 switch (r_type)
12450 {
12451 default:
12452 (*_bfd_error_handler)
12453 (_("%B: unknown relocation type %d for symbol %s"),
12454 input_bfd, (int) r_type, sym_name);
12455
12456 bfd_set_error (bfd_error_bad_value);
12457 ret = FALSE;
12458 continue;
12459
12460 case R_PPC64_NONE:
12461 case R_PPC64_TLS:
12462 case R_PPC64_TLSGD:
12463 case R_PPC64_TLSLD:
12464 case R_PPC64_GNU_VTINHERIT:
12465 case R_PPC64_GNU_VTENTRY:
12466 continue;
12467
12468 /* GOT16 relocations. Like an ADDR16 using the symbol's
12469 address in the GOT as relocation value instead of the
12470 symbol's value itself. Also, create a GOT entry for the
12471 symbol and put the symbol value there. */
12472 case R_PPC64_GOT_TLSGD16:
12473 case R_PPC64_GOT_TLSGD16_LO:
12474 case R_PPC64_GOT_TLSGD16_HI:
12475 case R_PPC64_GOT_TLSGD16_HA:
12476 tls_type = TLS_TLS | TLS_GD;
12477 goto dogot;
12478
12479 case R_PPC64_GOT_TLSLD16:
12480 case R_PPC64_GOT_TLSLD16_LO:
12481 case R_PPC64_GOT_TLSLD16_HI:
12482 case R_PPC64_GOT_TLSLD16_HA:
12483 tls_type = TLS_TLS | TLS_LD;
12484 goto dogot;
12485
12486 case R_PPC64_GOT_TPREL16_DS:
12487 case R_PPC64_GOT_TPREL16_LO_DS:
12488 case R_PPC64_GOT_TPREL16_HI:
12489 case R_PPC64_GOT_TPREL16_HA:
12490 tls_type = TLS_TLS | TLS_TPREL;
12491 goto dogot;
12492
12493 case R_PPC64_GOT_DTPREL16_DS:
12494 case R_PPC64_GOT_DTPREL16_LO_DS:
12495 case R_PPC64_GOT_DTPREL16_HI:
12496 case R_PPC64_GOT_DTPREL16_HA:
12497 tls_type = TLS_TLS | TLS_DTPREL;
12498 goto dogot;
12499
12500 case R_PPC64_GOT16:
12501 case R_PPC64_GOT16_LO:
12502 case R_PPC64_GOT16_HI:
12503 case R_PPC64_GOT16_HA:
12504 case R_PPC64_GOT16_DS:
12505 case R_PPC64_GOT16_LO_DS:
12506 dogot:
12507 {
12508 /* Relocation is to the entry for this symbol in the global
12509 offset table. */
12510 asection *got;
12511 bfd_vma *offp;
12512 bfd_vma off;
12513 unsigned long indx = 0;
12514 struct got_entry *ent;
12515
12516 if (tls_type == (TLS_TLS | TLS_LD)
12517 && (h == NULL
12518 || !h->elf.def_dynamic))
12519 ent = ppc64_tlsld_got (input_bfd);
12520 else
12521 {
12522
12523 if (h != NULL)
12524 {
12525 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12526 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12527 &h->elf)
12528 || (info->shared
12529 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12530 /* This is actually a static link, or it is a
12531 -Bsymbolic link and the symbol is defined
12532 locally, or the symbol was forced to be local
12533 because of a version file. */
12534 ;
12535 else
12536 {
12537 indx = h->elf.dynindx;
12538 unresolved_reloc = FALSE;
12539 }
12540 ent = h->elf.got.glist;
12541 }
12542 else
12543 {
12544 if (local_got_ents == NULL)
12545 abort ();
12546 ent = local_got_ents[r_symndx];
12547 }
12548
12549 for (; ent != NULL; ent = ent->next)
12550 if (ent->addend == orig_addend
12551 && ent->owner == input_bfd
12552 && ent->tls_type == tls_type)
12553 break;
12554 }
12555
12556 if (ent == NULL)
12557 abort ();
12558 if (ent->is_indirect)
12559 ent = ent->got.ent;
12560 offp = &ent->got.offset;
12561 got = ppc64_elf_tdata (ent->owner)->got;
12562 if (got == NULL)
12563 abort ();
12564
12565 /* The offset must always be a multiple of 8. We use the
12566 least significant bit to record whether we have already
12567 processed this entry. */
12568 off = *offp;
12569 if ((off & 1) != 0)
12570 off &= ~1;
12571 else
12572 {
12573 /* Generate relocs for the dynamic linker, except in
12574 the case of TLSLD where we'll use one entry per
12575 module. */
12576 asection *relgot;
12577 bfd_boolean ifunc;
12578
12579 *offp = off | 1;
12580 relgot = NULL;
12581 ifunc = (h != NULL
12582 ? h->elf.type == STT_GNU_IFUNC
12583 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12584 if ((info->shared || indx != 0)
12585 && (h == NULL
12586 || (tls_type == (TLS_TLS | TLS_LD)
12587 && !h->elf.def_dynamic)
12588 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12589 || h->elf.root.type != bfd_link_hash_undefweak))
12590 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12591 else if (ifunc)
12592 relgot = htab->reliplt;
12593 if (relgot != NULL)
12594 {
12595 outrel.r_offset = (got->output_section->vma
12596 + got->output_offset
12597 + off);
12598 outrel.r_addend = addend;
12599 if (tls_type & (TLS_LD | TLS_GD))
12600 {
12601 outrel.r_addend = 0;
12602 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12603 if (tls_type == (TLS_TLS | TLS_GD))
12604 {
12605 loc = relgot->contents;
12606 loc += (relgot->reloc_count++
12607 * sizeof (Elf64_External_Rela));
12608 bfd_elf64_swap_reloca_out (output_bfd,
12609 &outrel, loc);
12610 outrel.r_offset += 8;
12611 outrel.r_addend = addend;
12612 outrel.r_info
12613 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12614 }
12615 }
12616 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12617 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12618 else if (tls_type == (TLS_TLS | TLS_TPREL))
12619 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12620 else if (indx != 0)
12621 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12622 else
12623 {
12624 if (ifunc)
12625 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12626 else
12627 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12628
12629 /* Write the .got section contents for the sake
12630 of prelink. */
12631 loc = got->contents + off;
12632 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12633 loc);
12634 }
12635
12636 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12637 {
12638 outrel.r_addend += relocation;
12639 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12640 outrel.r_addend -= htab->elf.tls_sec->vma;
12641 }
12642 loc = relgot->contents;
12643 loc += (relgot->reloc_count++
12644 * sizeof (Elf64_External_Rela));
12645 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12646 }
12647
12648 /* Init the .got section contents here if we're not
12649 emitting a reloc. */
12650 else
12651 {
12652 relocation += addend;
12653 if (tls_type == (TLS_TLS | TLS_LD))
12654 relocation = 1;
12655 else if (tls_type != 0)
12656 {
12657 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12658 if (tls_type == (TLS_TLS | TLS_TPREL))
12659 relocation += DTP_OFFSET - TP_OFFSET;
12660
12661 if (tls_type == (TLS_TLS | TLS_GD))
12662 {
12663 bfd_put_64 (output_bfd, relocation,
12664 got->contents + off + 8);
12665 relocation = 1;
12666 }
12667 }
12668
12669 bfd_put_64 (output_bfd, relocation,
12670 got->contents + off);
12671 }
12672 }
12673
12674 if (off >= (bfd_vma) -2)
12675 abort ();
12676
12677 relocation = got->output_section->vma + got->output_offset + off;
12678 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12679 }
12680 break;
12681
12682 case R_PPC64_PLT16_HA:
12683 case R_PPC64_PLT16_HI:
12684 case R_PPC64_PLT16_LO:
12685 case R_PPC64_PLT32:
12686 case R_PPC64_PLT64:
12687 /* Relocation is to the entry for this symbol in the
12688 procedure linkage table. */
12689
12690 /* Resolve a PLT reloc against a local symbol directly,
12691 without using the procedure linkage table. */
12692 if (h == NULL)
12693 break;
12694
12695 /* It's possible that we didn't make a PLT entry for this
12696 symbol. This happens when statically linking PIC code,
12697 or when using -Bsymbolic. Go find a match if there is a
12698 PLT entry. */
12699 if (htab->plt != NULL)
12700 {
12701 struct plt_entry *ent;
12702 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12703 if (ent->addend == orig_addend
12704 && ent->plt.offset != (bfd_vma) -1)
12705 {
12706 relocation = (htab->plt->output_section->vma
12707 + htab->plt->output_offset
12708 + ent->plt.offset);
12709 unresolved_reloc = FALSE;
12710 }
12711 }
12712 break;
12713
12714 case R_PPC64_TOC:
12715 /* Relocation value is TOC base. */
12716 relocation = TOCstart;
12717 if (r_symndx == STN_UNDEF)
12718 relocation += htab->stub_group[input_section->id].toc_off;
12719 else if (unresolved_reloc)
12720 ;
12721 else if (sec != NULL && sec->id <= htab->top_id)
12722 relocation += htab->stub_group[sec->id].toc_off;
12723 else
12724 unresolved_reloc = TRUE;
12725 goto dodyn;
12726
12727 /* TOC16 relocs. We want the offset relative to the TOC base,
12728 which is the address of the start of the TOC plus 0x8000.
12729 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12730 in this order. */
12731 case R_PPC64_TOC16:
12732 case R_PPC64_TOC16_LO:
12733 case R_PPC64_TOC16_HI:
12734 case R_PPC64_TOC16_DS:
12735 case R_PPC64_TOC16_LO_DS:
12736 case R_PPC64_TOC16_HA:
12737 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12738 break;
12739
12740 /* Relocate against the beginning of the section. */
12741 case R_PPC64_SECTOFF:
12742 case R_PPC64_SECTOFF_LO:
12743 case R_PPC64_SECTOFF_HI:
12744 case R_PPC64_SECTOFF_DS:
12745 case R_PPC64_SECTOFF_LO_DS:
12746 case R_PPC64_SECTOFF_HA:
12747 if (sec != NULL)
12748 addend -= sec->output_section->vma;
12749 break;
12750
12751 case R_PPC64_REL16:
12752 case R_PPC64_REL16_LO:
12753 case R_PPC64_REL16_HI:
12754 case R_PPC64_REL16_HA:
12755 break;
12756
12757 case R_PPC64_REL14:
12758 case R_PPC64_REL14_BRNTAKEN:
12759 case R_PPC64_REL14_BRTAKEN:
12760 case R_PPC64_REL24:
12761 break;
12762
12763 case R_PPC64_TPREL16:
12764 case R_PPC64_TPREL16_LO:
12765 case R_PPC64_TPREL16_HI:
12766 case R_PPC64_TPREL16_HA:
12767 case R_PPC64_TPREL16_DS:
12768 case R_PPC64_TPREL16_LO_DS:
12769 case R_PPC64_TPREL16_HIGHER:
12770 case R_PPC64_TPREL16_HIGHERA:
12771 case R_PPC64_TPREL16_HIGHEST:
12772 case R_PPC64_TPREL16_HIGHESTA:
12773 if (h != NULL
12774 && h->elf.root.type == bfd_link_hash_undefweak
12775 && h->elf.dynindx == -1)
12776 {
12777 /* Make this relocation against an undefined weak symbol
12778 resolve to zero. This is really just a tweak, since
12779 code using weak externs ought to check that they are
12780 defined before using them. */
12781 bfd_byte *p = contents + rel->r_offset - d_offset;
12782
12783 insn = bfd_get_32 (output_bfd, p);
12784 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12785 if (insn != 0)
12786 bfd_put_32 (output_bfd, insn, p);
12787 break;
12788 }
12789 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12790 if (info->shared)
12791 /* The TPREL16 relocs shouldn't really be used in shared
12792 libs as they will result in DT_TEXTREL being set, but
12793 support them anyway. */
12794 goto dodyn;
12795 break;
12796
12797 case R_PPC64_DTPREL16:
12798 case R_PPC64_DTPREL16_LO:
12799 case R_PPC64_DTPREL16_HI:
12800 case R_PPC64_DTPREL16_HA:
12801 case R_PPC64_DTPREL16_DS:
12802 case R_PPC64_DTPREL16_LO_DS:
12803 case R_PPC64_DTPREL16_HIGHER:
12804 case R_PPC64_DTPREL16_HIGHERA:
12805 case R_PPC64_DTPREL16_HIGHEST:
12806 case R_PPC64_DTPREL16_HIGHESTA:
12807 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12808 break;
12809
12810 case R_PPC64_DTPMOD64:
12811 relocation = 1;
12812 addend = 0;
12813 goto dodyn;
12814
12815 case R_PPC64_TPREL64:
12816 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12817 goto dodyn;
12818
12819 case R_PPC64_DTPREL64:
12820 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12821 /* Fall thru */
12822
12823 /* Relocations that may need to be propagated if this is a
12824 dynamic object. */
12825 case R_PPC64_REL30:
12826 case R_PPC64_REL32:
12827 case R_PPC64_REL64:
12828 case R_PPC64_ADDR14:
12829 case R_PPC64_ADDR14_BRNTAKEN:
12830 case R_PPC64_ADDR14_BRTAKEN:
12831 case R_PPC64_ADDR16:
12832 case R_PPC64_ADDR16_DS:
12833 case R_PPC64_ADDR16_HA:
12834 case R_PPC64_ADDR16_HI:
12835 case R_PPC64_ADDR16_HIGHER:
12836 case R_PPC64_ADDR16_HIGHERA:
12837 case R_PPC64_ADDR16_HIGHEST:
12838 case R_PPC64_ADDR16_HIGHESTA:
12839 case R_PPC64_ADDR16_LO:
12840 case R_PPC64_ADDR16_LO_DS:
12841 case R_PPC64_ADDR24:
12842 case R_PPC64_ADDR32:
12843 case R_PPC64_ADDR64:
12844 case R_PPC64_UADDR16:
12845 case R_PPC64_UADDR32:
12846 case R_PPC64_UADDR64:
12847 dodyn:
12848 if ((input_section->flags & SEC_ALLOC) == 0)
12849 break;
12850
12851 if (NO_OPD_RELOCS && is_opd)
12852 break;
12853
12854 if ((info->shared
12855 && (h == NULL
12856 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12857 || h->elf.root.type != bfd_link_hash_undefweak)
12858 && (must_be_dyn_reloc (info, r_type)
12859 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12860 || (ELIMINATE_COPY_RELOCS
12861 && !info->shared
12862 && h != NULL
12863 && h->elf.dynindx != -1
12864 && !h->elf.non_got_ref
12865 && !h->elf.def_regular)
12866 || (!info->shared
12867 && (h != NULL
12868 ? h->elf.type == STT_GNU_IFUNC
12869 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12870 {
12871 bfd_boolean skip, relocate;
12872 asection *sreloc;
12873 bfd_vma out_off;
12874
12875 /* When generating a dynamic object, these relocations
12876 are copied into the output file to be resolved at run
12877 time. */
12878
12879 skip = FALSE;
12880 relocate = FALSE;
12881
12882 out_off = _bfd_elf_section_offset (output_bfd, info,
12883 input_section, rel->r_offset);
12884 if (out_off == (bfd_vma) -1)
12885 skip = TRUE;
12886 else if (out_off == (bfd_vma) -2)
12887 skip = TRUE, relocate = TRUE;
12888 out_off += (input_section->output_section->vma
12889 + input_section->output_offset);
12890 outrel.r_offset = out_off;
12891 outrel.r_addend = rel->r_addend;
12892
12893 /* Optimize unaligned reloc use. */
12894 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12895 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12896 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12897 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12898 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12899 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12900 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12901 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12902 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12903
12904 if (skip)
12905 memset (&outrel, 0, sizeof outrel);
12906 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12907 && !is_opd
12908 && r_type != R_PPC64_TOC)
12909 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12910 else
12911 {
12912 /* This symbol is local, or marked to become local,
12913 or this is an opd section reloc which must point
12914 at a local function. */
12915 outrel.r_addend += relocation;
12916 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12917 {
12918 if (is_opd && h != NULL)
12919 {
12920 /* Lie about opd entries. This case occurs
12921 when building shared libraries and we
12922 reference a function in another shared
12923 lib. The same thing happens for a weak
12924 definition in an application that's
12925 overridden by a strong definition in a
12926 shared lib. (I believe this is a generic
12927 bug in binutils handling of weak syms.)
12928 In these cases we won't use the opd
12929 entry in this lib. */
12930 unresolved_reloc = FALSE;
12931 }
12932 if (!is_opd
12933 && r_type == R_PPC64_ADDR64
12934 && (h != NULL
12935 ? h->elf.type == STT_GNU_IFUNC
12936 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12937 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12938 else
12939 {
12940 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12941
12942 /* We need to relocate .opd contents for ld.so.
12943 Prelink also wants simple and consistent rules
12944 for relocs. This make all RELATIVE relocs have
12945 *r_offset equal to r_addend. */
12946 relocate = TRUE;
12947 }
12948 }
12949 else
12950 {
12951 long indx = 0;
12952
12953 if (h != NULL
12954 ? h->elf.type == STT_GNU_IFUNC
12955 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12956 {
12957 (*_bfd_error_handler)
12958 (_("%B(%A+0x%lx): relocation %s for indirect "
12959 "function %s unsupported"),
12960 input_bfd,
12961 input_section,
12962 (long) rel->r_offset,
12963 ppc64_elf_howto_table[r_type]->name,
12964 sym_name);
12965 ret = FALSE;
12966 }
12967 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
12968 ;
12969 else if (sec == NULL || sec->owner == NULL)
12970 {
12971 bfd_set_error (bfd_error_bad_value);
12972 return FALSE;
12973 }
12974 else
12975 {
12976 asection *osec;
12977
12978 osec = sec->output_section;
12979 indx = elf_section_data (osec)->dynindx;
12980
12981 if (indx == 0)
12982 {
12983 if ((osec->flags & SEC_READONLY) == 0
12984 && htab->elf.data_index_section != NULL)
12985 osec = htab->elf.data_index_section;
12986 else
12987 osec = htab->elf.text_index_section;
12988 indx = elf_section_data (osec)->dynindx;
12989 }
12990 BFD_ASSERT (indx != 0);
12991
12992 /* We are turning this relocation into one
12993 against a section symbol, so subtract out
12994 the output section's address but not the
12995 offset of the input section in the output
12996 section. */
12997 outrel.r_addend -= osec->vma;
12998 }
12999
13000 outrel.r_info = ELF64_R_INFO (indx, r_type);
13001 }
13002 }
13003
13004 sreloc = elf_section_data (input_section)->sreloc;
13005 if (!htab->elf.dynamic_sections_created)
13006 sreloc = htab->reliplt;
13007 if (sreloc == NULL)
13008 abort ();
13009
13010 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13011 >= sreloc->size)
13012 abort ();
13013 loc = sreloc->contents;
13014 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13015 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13016
13017 /* If this reloc is against an external symbol, it will
13018 be computed at runtime, so there's no need to do
13019 anything now. However, for the sake of prelink ensure
13020 that the section contents are a known value. */
13021 if (! relocate)
13022 {
13023 unresolved_reloc = FALSE;
13024 /* The value chosen here is quite arbitrary as ld.so
13025 ignores section contents except for the special
13026 case of .opd where the contents might be accessed
13027 before relocation. Choose zero, as that won't
13028 cause reloc overflow. */
13029 relocation = 0;
13030 addend = 0;
13031 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13032 to improve backward compatibility with older
13033 versions of ld. */
13034 if (r_type == R_PPC64_ADDR64)
13035 addend = outrel.r_addend;
13036 /* Adjust pc_relative relocs to have zero in *r_offset. */
13037 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13038 addend = (input_section->output_section->vma
13039 + input_section->output_offset
13040 + rel->r_offset);
13041 }
13042 }
13043 break;
13044
13045 case R_PPC64_COPY:
13046 case R_PPC64_GLOB_DAT:
13047 case R_PPC64_JMP_SLOT:
13048 case R_PPC64_JMP_IREL:
13049 case R_PPC64_RELATIVE:
13050 /* We shouldn't ever see these dynamic relocs in relocatable
13051 files. */
13052 /* Fall through. */
13053
13054 case R_PPC64_PLTGOT16:
13055 case R_PPC64_PLTGOT16_DS:
13056 case R_PPC64_PLTGOT16_HA:
13057 case R_PPC64_PLTGOT16_HI:
13058 case R_PPC64_PLTGOT16_LO:
13059 case R_PPC64_PLTGOT16_LO_DS:
13060 case R_PPC64_PLTREL32:
13061 case R_PPC64_PLTREL64:
13062 /* These ones haven't been implemented yet. */
13063
13064 (*_bfd_error_handler)
13065 (_("%B: relocation %s is not supported for symbol %s."),
13066 input_bfd,
13067 ppc64_elf_howto_table[r_type]->name, sym_name);
13068
13069 bfd_set_error (bfd_error_invalid_operation);
13070 ret = FALSE;
13071 continue;
13072 }
13073
13074 /* Multi-instruction sequences that access the TOC can be
13075 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13076 to nop; addi rb,r2,x; */
13077 switch (r_type)
13078 {
13079 default:
13080 break;
13081
13082 case R_PPC64_GOT_TLSLD16_HI:
13083 case R_PPC64_GOT_TLSGD16_HI:
13084 case R_PPC64_GOT_TPREL16_HI:
13085 case R_PPC64_GOT_DTPREL16_HI:
13086 case R_PPC64_GOT16_HI:
13087 case R_PPC64_TOC16_HI:
13088 /* These relocs would only be useful if building up an
13089 offset to later add to r2, perhaps in an indexed
13090 addressing mode instruction. Don't try to optimize.
13091 Unfortunately, the possibility of someone building up an
13092 offset like this or even with the HA relocs, means that
13093 we need to check the high insn when optimizing the low
13094 insn. */
13095 break;
13096
13097 case R_PPC64_GOT_TLSLD16_HA:
13098 case R_PPC64_GOT_TLSGD16_HA:
13099 case R_PPC64_GOT_TPREL16_HA:
13100 case R_PPC64_GOT_DTPREL16_HA:
13101 case R_PPC64_GOT16_HA:
13102 case R_PPC64_TOC16_HA:
13103 /* nop is done later. */
13104 break;
13105
13106 case R_PPC64_GOT_TLSLD16_LO:
13107 case R_PPC64_GOT_TLSGD16_LO:
13108 case R_PPC64_GOT_TPREL16_LO_DS:
13109 case R_PPC64_GOT_DTPREL16_LO_DS:
13110 case R_PPC64_GOT16_LO:
13111 case R_PPC64_GOT16_LO_DS:
13112 case R_PPC64_TOC16_LO:
13113 case R_PPC64_TOC16_LO_DS:
13114 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13115 {
13116 bfd_byte *p = contents + (rel->r_offset & ~3);
13117 insn = bfd_get_32 (input_bfd, p);
13118 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13119 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13120 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13121 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13122 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13123 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13124 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13125 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13126 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13127 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13128 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13129 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13130 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13131 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13132 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13133 && (insn & 3) != 1)
13134 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13135 && ((insn & 3) == 0 || (insn & 3) == 3)))
13136 {
13137 unsigned int reg = (insn >> 16) & 0x1f;
13138 const Elf_Internal_Rela *ha;
13139 bfd_boolean match_addend;
13140
13141 match_addend = (sym != NULL
13142 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13143 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13144 input_bfd, contents);
13145 if (ha != NULL)
13146 {
13147 insn &= ~(0x1f << 16);
13148 insn |= reg << 16;
13149 bfd_put_32 (input_bfd, insn, p);
13150 if (ha_opt == NULL)
13151 {
13152 ha_opt = bfd_zmalloc (input_section->reloc_count);
13153 if (ha_opt == NULL)
13154 return FALSE;
13155 }
13156 ha_opt[ha - relocs] = 1;
13157 }
13158 else
13159 /* If we don't find a matching high part insn,
13160 something is fishy. Refuse to nop any high
13161 part insn in this section. */
13162 no_ha_opt = TRUE;
13163 }
13164 }
13165 break;
13166 }
13167
13168 /* Do any further special processing. */
13169 switch (r_type)
13170 {
13171 default:
13172 break;
13173
13174 case R_PPC64_ADDR16_HA:
13175 case R_PPC64_REL16_HA:
13176 case R_PPC64_ADDR16_HIGHERA:
13177 case R_PPC64_ADDR16_HIGHESTA:
13178 case R_PPC64_TOC16_HA:
13179 case R_PPC64_SECTOFF_HA:
13180 case R_PPC64_TPREL16_HA:
13181 case R_PPC64_DTPREL16_HA:
13182 case R_PPC64_TPREL16_HIGHER:
13183 case R_PPC64_TPREL16_HIGHERA:
13184 case R_PPC64_TPREL16_HIGHEST:
13185 case R_PPC64_TPREL16_HIGHESTA:
13186 case R_PPC64_DTPREL16_HIGHER:
13187 case R_PPC64_DTPREL16_HIGHERA:
13188 case R_PPC64_DTPREL16_HIGHEST:
13189 case R_PPC64_DTPREL16_HIGHESTA:
13190 /* It's just possible that this symbol is a weak symbol
13191 that's not actually defined anywhere. In that case,
13192 'sec' would be NULL, and we should leave the symbol
13193 alone (it will be set to zero elsewhere in the link). */
13194 if (sec == NULL)
13195 break;
13196 /* Fall thru */
13197
13198 case R_PPC64_GOT16_HA:
13199 case R_PPC64_PLTGOT16_HA:
13200 case R_PPC64_PLT16_HA:
13201 case R_PPC64_GOT_TLSGD16_HA:
13202 case R_PPC64_GOT_TLSLD16_HA:
13203 case R_PPC64_GOT_TPREL16_HA:
13204 case R_PPC64_GOT_DTPREL16_HA:
13205 /* Add 0x10000 if sign bit in 0:15 is set.
13206 Bits 0:15 are not used. */
13207 addend += 0x8000;
13208 break;
13209
13210 case R_PPC64_ADDR16_DS:
13211 case R_PPC64_ADDR16_LO_DS:
13212 case R_PPC64_GOT16_DS:
13213 case R_PPC64_GOT16_LO_DS:
13214 case R_PPC64_PLT16_LO_DS:
13215 case R_PPC64_SECTOFF_DS:
13216 case R_PPC64_SECTOFF_LO_DS:
13217 case R_PPC64_TOC16_DS:
13218 case R_PPC64_TOC16_LO_DS:
13219 case R_PPC64_PLTGOT16_DS:
13220 case R_PPC64_PLTGOT16_LO_DS:
13221 case R_PPC64_GOT_TPREL16_DS:
13222 case R_PPC64_GOT_TPREL16_LO_DS:
13223 case R_PPC64_GOT_DTPREL16_DS:
13224 case R_PPC64_GOT_DTPREL16_LO_DS:
13225 case R_PPC64_TPREL16_DS:
13226 case R_PPC64_TPREL16_LO_DS:
13227 case R_PPC64_DTPREL16_DS:
13228 case R_PPC64_DTPREL16_LO_DS:
13229 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13230 mask = 3;
13231 /* If this reloc is against an lq insn, then the value must be
13232 a multiple of 16. This is somewhat of a hack, but the
13233 "correct" way to do this by defining _DQ forms of all the
13234 _DS relocs bloats all reloc switches in this file. It
13235 doesn't seem to make much sense to use any of these relocs
13236 in data, so testing the insn should be safe. */
13237 if ((insn & (0x3f << 26)) == (56u << 26))
13238 mask = 15;
13239 if (((relocation + addend) & mask) != 0)
13240 {
13241 (*_bfd_error_handler)
13242 (_("%B(%A+0x%lx): error: %s not a multiple of %u"),
13243 input_bfd, input_section, (long) rel->r_offset,
13244 ppc64_elf_howto_table[r_type]->name,
13245 mask + 1);
13246 bfd_set_error (bfd_error_bad_value);
13247 ret = FALSE;
13248 continue;
13249 }
13250 break;
13251 }
13252
13253 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13254 because such sections are not SEC_ALLOC and thus ld.so will
13255 not process them. */
13256 if (unresolved_reloc
13257 && !((input_section->flags & SEC_DEBUGGING) != 0
13258 && h->elf.def_dynamic))
13259 {
13260 (*_bfd_error_handler)
13261 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13262 input_bfd,
13263 input_section,
13264 (long) rel->r_offset,
13265 ppc64_elf_howto_table[(int) r_type]->name,
13266 h->elf.root.root.string);
13267 ret = FALSE;
13268 }
13269
13270 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13271 input_bfd,
13272 input_section,
13273 contents,
13274 rel->r_offset,
13275 relocation,
13276 addend);
13277
13278 if (r != bfd_reloc_ok)
13279 {
13280 if (sym_name == NULL)
13281 sym_name = "(null)";
13282 if (r == bfd_reloc_overflow)
13283 {
13284 if (warned)
13285 continue;
13286 if (h != NULL
13287 && h->elf.root.type == bfd_link_hash_undefweak
13288 && ppc64_elf_howto_table[r_type]->pc_relative)
13289 {
13290 /* Assume this is a call protected by other code that
13291 detects the symbol is undefined. If this is the case,
13292 we can safely ignore the overflow. If not, the
13293 program is hosed anyway, and a little warning isn't
13294 going to help. */
13295
13296 continue;
13297 }
13298
13299 if (!((*info->callbacks->reloc_overflow)
13300 (info, (h ? &h->elf.root : NULL), sym_name,
13301 ppc64_elf_howto_table[r_type]->name,
13302 orig_addend, input_bfd, input_section, rel->r_offset)))
13303 return FALSE;
13304 }
13305 else
13306 {
13307 (*_bfd_error_handler)
13308 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13309 input_bfd,
13310 input_section,
13311 (long) rel->r_offset,
13312 ppc64_elf_howto_table[r_type]->name,
13313 sym_name,
13314 (int) r);
13315 ret = FALSE;
13316 }
13317 }
13318 }
13319
13320 if (ha_opt != NULL)
13321 {
13322 if (!no_ha_opt)
13323 {
13324 unsigned char *opt = ha_opt;
13325 rel = relocs;
13326 relend = relocs + input_section->reloc_count;
13327 for (; rel < relend; opt++, rel++)
13328 if (*opt != 0)
13329 {
13330 bfd_byte *p = contents + (rel->r_offset & ~3);
13331 bfd_put_32 (input_bfd, NOP, p);
13332 }
13333 }
13334 free (ha_opt);
13335 }
13336
13337 /* If we're emitting relocations, then shortly after this function
13338 returns, reloc offsets and addends for this section will be
13339 adjusted. Worse, reloc symbol indices will be for the output
13340 file rather than the input. Save a copy of the relocs for
13341 opd_entry_value. */
13342 if (is_opd && (info->emitrelocations || info->relocatable))
13343 {
13344 bfd_size_type amt;
13345 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13346 rel = bfd_alloc (input_bfd, amt);
13347 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13348 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13349 if (rel == NULL)
13350 return FALSE;
13351 memcpy (rel, relocs, amt);
13352 }
13353 return ret;
13354}
13355
13356/* Adjust the value of any local symbols in opd sections. */
13357
13358static int
13359ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13360 const char *name ATTRIBUTE_UNUSED,
13361 Elf_Internal_Sym *elfsym,
13362 asection *input_sec,
13363 struct elf_link_hash_entry *h)
13364{
13365 struct _opd_sec_data *opd;
13366 long adjust;
13367 bfd_vma value;
13368
13369 if (h != NULL)
13370 return 1;
13371
13372 opd = get_opd_info (input_sec);
13373 if (opd == NULL || opd->adjust == NULL)
13374 return 1;
13375
13376 value = elfsym->st_value - input_sec->output_offset;
13377 if (!info->relocatable)
13378 value -= input_sec->output_section->vma;
13379
13380 adjust = opd->adjust[value / 8];
13381 if (adjust == -1)
13382 return 2;
13383
13384 elfsym->st_value += adjust;
13385 return 1;
13386}
13387
13388/* Finish up dynamic symbol handling. We set the contents of various
13389 dynamic sections here. */
13390
13391static bfd_boolean
13392ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13393 struct bfd_link_info *info,
13394 struct elf_link_hash_entry *h,
13395 Elf_Internal_Sym *sym)
13396{
13397 struct ppc_link_hash_table *htab;
13398 struct plt_entry *ent;
13399 Elf_Internal_Rela rela;
13400 bfd_byte *loc;
13401
13402 htab = ppc_hash_table (info);
13403 if (htab == NULL)
13404 return FALSE;
13405
13406 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13407 if (ent->plt.offset != (bfd_vma) -1)
13408 {
13409 /* This symbol has an entry in the procedure linkage
13410 table. Set it up. */
13411 if (!htab->elf.dynamic_sections_created
13412 || h->dynindx == -1)
13413 {
13414 BFD_ASSERT (h->type == STT_GNU_IFUNC
13415 && h->def_regular
13416 && (h->root.type == bfd_link_hash_defined
13417 || h->root.type == bfd_link_hash_defweak));
13418 rela.r_offset = (htab->iplt->output_section->vma
13419 + htab->iplt->output_offset
13420 + ent->plt.offset);
13421 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13422 rela.r_addend = (h->root.u.def.value
13423 + h->root.u.def.section->output_offset
13424 + h->root.u.def.section->output_section->vma
13425 + ent->addend);
13426 loc = (htab->reliplt->contents
13427 + (htab->reliplt->reloc_count++
13428 * sizeof (Elf64_External_Rela)));
13429 }
13430 else
13431 {
13432 rela.r_offset = (htab->plt->output_section->vma
13433 + htab->plt->output_offset
13434 + ent->plt.offset);
13435 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13436 rela.r_addend = ent->addend;
13437 loc = (htab->relplt->contents
13438 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13439 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13440 }
13441 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13442 }
13443
13444 if (h->needs_copy)
13445 {
13446 /* This symbol needs a copy reloc. Set it up. */
13447
13448 if (h->dynindx == -1
13449 || (h->root.type != bfd_link_hash_defined
13450 && h->root.type != bfd_link_hash_defweak)
13451 || htab->relbss == NULL)
13452 abort ();
13453
13454 rela.r_offset = (h->root.u.def.value
13455 + h->root.u.def.section->output_section->vma
13456 + h->root.u.def.section->output_offset);
13457 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13458 rela.r_addend = 0;
13459 loc = htab->relbss->contents;
13460 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13461 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13462 }
13463
13464 /* Mark some specially defined symbols as absolute. */
13465 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13466 sym->st_shndx = SHN_ABS;
13467
13468 return TRUE;
13469}
13470
13471/* Used to decide how to sort relocs in an optimal manner for the
13472 dynamic linker, before writing them out. */
13473
13474static enum elf_reloc_type_class
13475ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13476{
13477 enum elf_ppc64_reloc_type r_type;
13478
13479 r_type = ELF64_R_TYPE (rela->r_info);
13480 switch (r_type)
13481 {
13482 case R_PPC64_RELATIVE:
13483 return reloc_class_relative;
13484 case R_PPC64_JMP_SLOT:
13485 return reloc_class_plt;
13486 case R_PPC64_COPY:
13487 return reloc_class_copy;
13488 default:
13489 return reloc_class_normal;
13490 }
13491}
13492
13493/* Finish up the dynamic sections. */
13494
13495static bfd_boolean
13496ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13497 struct bfd_link_info *info)
13498{
13499 struct ppc_link_hash_table *htab;
13500 bfd *dynobj;
13501 asection *sdyn;
13502
13503 htab = ppc_hash_table (info);
13504 if (htab == NULL)
13505 return FALSE;
13506
13507 dynobj = htab->elf.dynobj;
13508 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13509
13510 if (htab->elf.dynamic_sections_created)
13511 {
13512 Elf64_External_Dyn *dyncon, *dynconend;
13513
13514 if (sdyn == NULL || htab->got == NULL)
13515 abort ();
13516
13517 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13518 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13519 for (; dyncon < dynconend; dyncon++)
13520 {
13521 Elf_Internal_Dyn dyn;
13522 asection *s;
13523
13524 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13525
13526 switch (dyn.d_tag)
13527 {
13528 default:
13529 continue;
13530
13531 case DT_PPC64_GLINK:
13532 s = htab->glink;
13533 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13534 /* We stupidly defined DT_PPC64_GLINK to be the start
13535 of glink rather than the first entry point, which is
13536 what ld.so needs, and now have a bigger stub to
13537 support automatic multiple TOCs. */
13538 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13539 break;
13540
13541 case DT_PPC64_OPD:
13542 s = bfd_get_section_by_name (output_bfd, ".opd");
13543 if (s == NULL)
13544 continue;
13545 dyn.d_un.d_ptr = s->vma;
13546 break;
13547
13548 case DT_PPC64_OPDSZ:
13549 s = bfd_get_section_by_name (output_bfd, ".opd");
13550 if (s == NULL)
13551 continue;
13552 dyn.d_un.d_val = s->size;
13553 break;
13554
13555 case DT_PLTGOT:
13556 s = htab->plt;
13557 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13558 break;
13559
13560 case DT_JMPREL:
13561 s = htab->relplt;
13562 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13563 break;
13564
13565 case DT_PLTRELSZ:
13566 dyn.d_un.d_val = htab->relplt->size;
13567 break;
13568
13569 case DT_RELASZ:
13570 /* Don't count procedure linkage table relocs in the
13571 overall reloc count. */
13572 s = htab->relplt;
13573 if (s == NULL)
13574 continue;
13575 dyn.d_un.d_val -= s->size;
13576 break;
13577
13578 case DT_RELA:
13579 /* We may not be using the standard ELF linker script.
13580 If .rela.plt is the first .rela section, we adjust
13581 DT_RELA to not include it. */
13582 s = htab->relplt;
13583 if (s == NULL)
13584 continue;
13585 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13586 continue;
13587 dyn.d_un.d_ptr += s->size;
13588 break;
13589 }
13590
13591 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13592 }
13593 }
13594
13595 if (htab->got != NULL && htab->got->size != 0)
13596 {
13597 /* Fill in the first entry in the global offset table.
13598 We use it to hold the link-time TOCbase. */
13599 bfd_put_64 (output_bfd,
13600 elf_gp (output_bfd) + TOC_BASE_OFF,
13601 htab->got->contents);
13602
13603 /* Set .got entry size. */
13604 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13605 }
13606
13607 if (htab->plt != NULL && htab->plt->size != 0)
13608 {
13609 /* Set .plt entry size. */
13610 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13611 = PLT_ENTRY_SIZE;
13612 }
13613
13614 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13615 brlt ourselves if emitrelocations. */
13616 if (htab->brlt != NULL
13617 && htab->brlt->reloc_count != 0
13618 && !_bfd_elf_link_output_relocs (output_bfd,
13619 htab->brlt,
13620 elf_section_data (htab->brlt)->rela.hdr,
13621 elf_section_data (htab->brlt)->relocs,
13622 NULL))
13623 return FALSE;
13624
13625 if (htab->glink != NULL
13626 && htab->glink->reloc_count != 0
13627 && !_bfd_elf_link_output_relocs (output_bfd,
13628 htab->glink,
13629 elf_section_data (htab->glink)->rela.hdr,
13630 elf_section_data (htab->glink)->relocs,
13631 NULL))
13632 return FALSE;
13633
13634 /* We need to handle writing out multiple GOT sections ourselves,
13635 since we didn't add them to DYNOBJ. We know dynobj is the first
13636 bfd. */
13637 while ((dynobj = dynobj->link_next) != NULL)
13638 {
13639 asection *s;
13640
13641 if (!is_ppc64_elf (dynobj))
13642 continue;
13643
13644 s = ppc64_elf_tdata (dynobj)->got;
13645 if (s != NULL
13646 && s->size != 0
13647 && s->output_section != bfd_abs_section_ptr
13648 && !bfd_set_section_contents (output_bfd, s->output_section,
13649 s->contents, s->output_offset,
13650 s->size))
13651 return FALSE;
13652 s = ppc64_elf_tdata (dynobj)->relgot;
13653 if (s != NULL
13654 && s->size != 0
13655 && s->output_section != bfd_abs_section_ptr
13656 && !bfd_set_section_contents (output_bfd, s->output_section,
13657 s->contents, s->output_offset,
13658 s->size))
13659 return FALSE;
13660 }
13661
13662 return TRUE;
13663}
13664
13665#include "elf64-target.h"
A mirror of the official binutils-gdb repository