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Move UNDEFWEAK_NO_DYNAMIC_RELOC to elf-bfd.h
[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* 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_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* 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_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* 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 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* 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 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x3e007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x3e007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x3e007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x3e007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x3e007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x3e007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* e_li split20 format. */
1660 HOWTO (R_PPC_VLE_ADDR20, /* type */
1661 16, /* rightshift */
1662 2, /* size (0 = byte, 1 = short, 2 = long) */
1663 20, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 bfd_elf_generic_reloc, /* special_function */
1668 "R_PPC_VLE_ADDR20", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0x1f07ff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 HOWTO (R_PPC_IRELATIVE, /* type */
1675 0, /* rightshift */
1676 2, /* size (0 = byte, 1 = short, 2 = long) */
1677 32, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc_elf_unhandled_reloc, /* special_function */
1682 "R_PPC_IRELATIVE", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffffffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation. */
1689 HOWTO (R_PPC_REL16, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_signed, /* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* A 16 bit relative relocation without overflow. */
1704 HOWTO (R_PPC_REL16_LO, /* type */
1705 0, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont,/* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_LO", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address. */
1719 HOWTO (R_PPC_REL16_HI, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 bfd_elf_generic_reloc, /* special_function */
1727 "R_PPC_REL16_HI", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* The high order 16 bits of a relative address, plus 1 if the contents of
1734 the low 16 bits, treated as a signed number, is negative. */
1735 HOWTO (R_PPC_REL16_HA, /* type */
1736 16, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1750 HOWTO (R_PPC_REL16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 TRUE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_REL16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 TRUE), /* pcrel_offset */
1763
1764 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1765 HOWTO (R_PPC_16DX_HA, /* type */
1766 16, /* rightshift */
1767 2, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 ppc_elf_addr16_ha_reloc, /* special_function */
1773 "R_PPC_16DX_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0x1fffc1, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable hierarchy. */
1780 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTINHERIT", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* GNU extension to record C++ vtable member usage. */
1795 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1796 0, /* rightshift */
1797 0, /* size (0 = byte, 1 = short, 2 = long) */
1798 0, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_dont, /* complain_on_overflow */
1802 NULL, /* special_function */
1803 "R_PPC_GNU_VTENTRY", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808
1809 /* Phony reloc to handle AIX style TOC entries. */
1810 HOWTO (R_PPC_TOC16, /* type */
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc_elf_unhandled_reloc, /* special_function */
1818 "R_PPC_TOC16", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xffff, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823 };
1824 \f
1825 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1826
1827 static void
1828 ppc_elf_howto_init (void)
1829 {
1830 unsigned int i, type;
1831
1832 for (i = 0;
1833 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1834 i++)
1835 {
1836 type = ppc_elf_howto_raw[i].type;
1837 if (type >= (sizeof (ppc_elf_howto_table)
1838 / sizeof (ppc_elf_howto_table[0])))
1839 abort ();
1840 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1841 }
1842 }
1843
1844 static reloc_howto_type *
1845 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1846 bfd_reloc_code_real_type code)
1847 {
1848 enum elf_ppc_reloc_type r;
1849
1850 /* Initialize howto table if not already done. */
1851 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1852 ppc_elf_howto_init ();
1853
1854 switch (code)
1855 {
1856 default:
1857 return NULL;
1858
1859 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1860 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1861 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1862 case BFD_RELOC_PPC64_ADDR16_DS:
1863 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1864 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1865 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1866 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1867 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1868 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1869 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1870 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1871 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1872 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1873 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1874 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1875 case BFD_RELOC_PPC64_GOT16_DS:
1876 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1877 case BFD_RELOC_PPC64_GOT16_LO_DS:
1878 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1879 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1880 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1881 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1882 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1883 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1884 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1885 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1886 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1887 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1888 case BFD_RELOC_PPC64_PLT16_LO_DS:
1889 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1890 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1891 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1892 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1893 case BFD_RELOC_PPC64_SECTOFF_DS:
1894 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1895 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1896 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1897 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1898 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1899 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1900 case BFD_RELOC_PPC64_TOC16_DS:
1901 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1902 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1903 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1904 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1905 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1906 case BFD_RELOC_PPC64_TPREL16_DS:
1907 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1908 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1909 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1910 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1911 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1912 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1913 case BFD_RELOC_PPC64_DTPREL16_DS:
1914 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1915 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1916 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1917 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1918 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1919 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1920 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1921 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1922 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1923 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1924 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1925 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1926 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1927 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1928 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1929 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1933 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1934 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1935 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1936 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1937 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1938 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1939 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1940 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1941 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1942 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1943 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1944 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1945 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1946 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1947 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1948 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1949 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1950 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1951 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1952 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1953 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1954 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1955 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1956 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1957 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1958 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1959 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1960 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1961 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1962 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1963 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1964 r = R_PPC_VLE_SDAREL_LO16A;
1965 break;
1966 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1967 r = R_PPC_VLE_SDAREL_LO16D;
1968 break;
1969 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1970 r = R_PPC_VLE_SDAREL_HI16A;
1971 break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1973 r = R_PPC_VLE_SDAREL_HI16D;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1976 r = R_PPC_VLE_SDAREL_HA16A;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1979 r = R_PPC_VLE_SDAREL_HA16D;
1980 break;
1981 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1982 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1983 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1984 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1985 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
1986 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
1987 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1988 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1989 }
1990
1991 return ppc_elf_howto_table[r];
1992 };
1993
1994 static reloc_howto_type *
1995 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1996 const char *r_name)
1997 {
1998 unsigned int i;
1999
2000 for (i = 0;
2001 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2002 i++)
2003 if (ppc_elf_howto_raw[i].name != NULL
2004 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2005 return &ppc_elf_howto_raw[i];
2006
2007 return NULL;
2008 }
2009
2010 /* Set the howto pointer for a PowerPC ELF reloc. */
2011
2012 static void
2013 ppc_elf_info_to_howto (bfd *abfd,
2014 arelent *cache_ptr,
2015 Elf_Internal_Rela *dst)
2016 {
2017 unsigned int r_type;
2018
2019 /* Initialize howto table if not already done. */
2020 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2021 ppc_elf_howto_init ();
2022
2023 r_type = ELF32_R_TYPE (dst->r_info);
2024 if (r_type >= R_PPC_max)
2025 {
2026 /* xgettext:c-format */
2027 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2028 abfd, r_type);
2029 bfd_set_error (bfd_error_bad_value);
2030 r_type = R_PPC_NONE;
2031 }
2032 cache_ptr->howto = ppc_elf_howto_table[r_type];
2033
2034 /* Just because the above assert didn't trigger doesn't mean that
2035 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2036 if (!cache_ptr->howto)
2037 {
2038 /* xgettext:c-format */
2039 _bfd_error_handler (_("%B: invalid relocation type %d"),
2040 abfd, r_type);
2041 bfd_set_error (bfd_error_bad_value);
2042
2043 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2044 }
2045 }
2046
2047 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2048
2049 static bfd_reloc_status_type
2050 ppc_elf_addr16_ha_reloc (bfd *abfd,
2051 arelent *reloc_entry,
2052 asymbol *symbol,
2053 void *data,
2054 asection *input_section,
2055 bfd *output_bfd,
2056 char **error_message ATTRIBUTE_UNUSED)
2057 {
2058 enum elf_ppc_reloc_type r_type;
2059 long insn;
2060 bfd_size_type octets;
2061 bfd_vma value;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 reloc_entry->addend += 0x8000;
2070 r_type = reloc_entry->howto->type;
2071 if (r_type != R_PPC_REL16DX_HA)
2072 return bfd_reloc_continue;
2073
2074 value = 0;
2075 if (!bfd_is_com_section (symbol->section))
2076 value = symbol->value;
2077 value += (reloc_entry->addend
2078 + symbol->section->output_offset
2079 + symbol->section->output_section->vma);
2080 value -= (reloc_entry->address
2081 + input_section->output_offset
2082 + input_section->output_section->vma);
2083 value >>= 16;
2084
2085 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2086 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2087 insn &= ~0x1fffc1;
2088 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2089 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2090 return bfd_reloc_ok;
2091 }
2092
2093 static bfd_reloc_status_type
2094 ppc_elf_unhandled_reloc (bfd *abfd,
2095 arelent *reloc_entry,
2096 asymbol *symbol,
2097 void *data,
2098 asection *input_section,
2099 bfd *output_bfd,
2100 char **error_message)
2101 {
2102 /* If this is a relocatable link (output_bfd test tells us), just
2103 call the generic function. Any adjustment will be done at final
2104 link time. */
2105 if (output_bfd != NULL)
2106 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2107 input_section, output_bfd, error_message);
2108
2109 if (error_message != NULL)
2110 {
2111 static char buf[60];
2112 sprintf (buf, _("generic linker can't handle %s"),
2113 reloc_entry->howto->name);
2114 *error_message = buf;
2115 }
2116 return bfd_reloc_dangerous;
2117 }
2118 \f
2119 /* Sections created by the linker. */
2120
2121 typedef struct elf_linker_section
2122 {
2123 /* Pointer to the bfd section. */
2124 asection *section;
2125 /* Section name. */
2126 const char *name;
2127 /* Associated bss section name. */
2128 const char *bss_name;
2129 /* Associated symbol name. */
2130 const char *sym_name;
2131 /* Associated symbol. */
2132 struct elf_link_hash_entry *sym;
2133 } elf_linker_section_t;
2134
2135 /* Linked list of allocated pointer entries. This hangs off of the
2136 symbol lists, and provides allows us to return different pointers,
2137 based on different addend's. */
2138
2139 typedef struct elf_linker_section_pointers
2140 {
2141 /* next allocated pointer for this symbol */
2142 struct elf_linker_section_pointers *next;
2143 /* offset of pointer from beginning of section */
2144 bfd_vma offset;
2145 /* addend used */
2146 bfd_vma addend;
2147 /* which linker section this is */
2148 elf_linker_section_t *lsect;
2149 } elf_linker_section_pointers_t;
2150
2151 struct ppc_elf_obj_tdata
2152 {
2153 struct elf_obj_tdata elf;
2154
2155 /* A mapping from local symbols to offsets into the various linker
2156 sections added. This is index by the symbol index. */
2157 elf_linker_section_pointers_t **linker_section_pointers;
2158
2159 /* Flags used to auto-detect plt type. */
2160 unsigned int makes_plt_call : 1;
2161 unsigned int has_rel16 : 1;
2162 };
2163
2164 #define ppc_elf_tdata(bfd) \
2165 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2166
2167 #define elf_local_ptr_offsets(bfd) \
2168 (ppc_elf_tdata (bfd)->linker_section_pointers)
2169
2170 #define is_ppc_elf(bfd) \
2171 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2172 && elf_object_id (bfd) == PPC32_ELF_DATA)
2173
2174 /* Override the generic function because we store some extras. */
2175
2176 static bfd_boolean
2177 ppc_elf_mkobject (bfd *abfd)
2178 {
2179 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2180 PPC32_ELF_DATA);
2181 }
2182
2183 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2184
2185 bfd_boolean
2186 _bfd_elf_ppc_set_arch (bfd *abfd)
2187 {
2188 unsigned long mach = 0;
2189 asection *s;
2190 unsigned char *contents;
2191
2192 if (abfd->arch_info->bits_per_word == 32
2193 && bfd_big_endian (abfd))
2194 {
2195
2196 for (s = abfd->sections; s != NULL; s = s->next)
2197 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2198 break;
2199 if (s != NULL)
2200 mach = bfd_mach_ppc_vle;
2201 }
2202
2203 if (mach == 0)
2204 {
2205 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2206 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2207 {
2208 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2209 unsigned int i;
2210
2211 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2212 {
2213 unsigned int val = bfd_get_32 (abfd, contents + i);
2214 switch (val >> 16)
2215 {
2216 case PPC_APUINFO_PMR:
2217 case PPC_APUINFO_RFMCI:
2218 if (mach == 0)
2219 mach = bfd_mach_ppc_titan;
2220 break;
2221
2222 case PPC_APUINFO_ISEL:
2223 case PPC_APUINFO_CACHELCK:
2224 if (mach == bfd_mach_ppc_titan)
2225 mach = bfd_mach_ppc_e500mc;
2226 break;
2227
2228 case PPC_APUINFO_SPE:
2229 case PPC_APUINFO_EFS:
2230 case PPC_APUINFO_BRLOCK:
2231 if (mach != bfd_mach_ppc_vle)
2232 mach = bfd_mach_ppc_e500;
2233 break;
2234
2235 case PPC_APUINFO_VLE:
2236 mach = bfd_mach_ppc_vle;
2237 break;
2238
2239 default:
2240 mach = -1ul;
2241 }
2242 }
2243 free (contents);
2244 }
2245 }
2246
2247 if (mach != 0 && mach != -1ul)
2248 {
2249 const bfd_arch_info_type *arch;
2250
2251 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2252 if (arch->mach == mach)
2253 {
2254 abfd->arch_info = arch;
2255 break;
2256 }
2257 }
2258 return TRUE;
2259 }
2260
2261 /* Fix bad default arch selected for a 32 bit input bfd when the
2262 default is 64 bit. Also select arch based on apuinfo. */
2263
2264 static bfd_boolean
2265 ppc_elf_object_p (bfd *abfd)
2266 {
2267 if (!abfd->arch_info->the_default)
2268 return TRUE;
2269
2270 if (abfd->arch_info->bits_per_word == 64)
2271 {
2272 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2273
2274 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2275 {
2276 /* Relies on arch after 64 bit default being 32 bit default. */
2277 abfd->arch_info = abfd->arch_info->next;
2278 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2279 }
2280 }
2281 return _bfd_elf_ppc_set_arch (abfd);
2282 }
2283
2284 /* Function to set whether a module needs the -mrelocatable bit set. */
2285
2286 static bfd_boolean
2287 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2288 {
2289 BFD_ASSERT (!elf_flags_init (abfd)
2290 || elf_elfheader (abfd)->e_flags == flags);
2291
2292 elf_elfheader (abfd)->e_flags = flags;
2293 elf_flags_init (abfd) = TRUE;
2294 return TRUE;
2295 }
2296
2297 /* Support for core dump NOTE sections. */
2298
2299 static bfd_boolean
2300 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2301 {
2302 int offset;
2303 unsigned int size;
2304
2305 switch (note->descsz)
2306 {
2307 default:
2308 return FALSE;
2309
2310 case 268: /* Linux/PPC. */
2311 /* pr_cursig */
2312 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2313
2314 /* pr_pid */
2315 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2316
2317 /* pr_reg */
2318 offset = 72;
2319 size = 192;
2320
2321 break;
2322 }
2323
2324 /* Make a ".reg/999" section. */
2325 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2326 size, note->descpos + offset);
2327 }
2328
2329 static bfd_boolean
2330 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2331 {
2332 switch (note->descsz)
2333 {
2334 default:
2335 return FALSE;
2336
2337 case 128: /* Linux/PPC elf_prpsinfo. */
2338 elf_tdata (abfd)->core->pid
2339 = bfd_get_32 (abfd, note->descdata + 16);
2340 elf_tdata (abfd)->core->program
2341 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2342 elf_tdata (abfd)->core->command
2343 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2344 }
2345
2346 /* Note that for some reason, a spurious space is tacked
2347 onto the end of the args in some (at least one anyway)
2348 implementations, so strip it off if it exists. */
2349
2350 {
2351 char *command = elf_tdata (abfd)->core->command;
2352 int n = strlen (command);
2353
2354 if (0 < n && command[n - 1] == ' ')
2355 command[n - 1] = '\0';
2356 }
2357
2358 return TRUE;
2359 }
2360
2361 static char *
2362 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2363 {
2364 switch (note_type)
2365 {
2366 default:
2367 return NULL;
2368
2369 case NT_PRPSINFO:
2370 {
2371 char data[128];
2372 va_list ap;
2373
2374 va_start (ap, note_type);
2375 memset (data, 0, sizeof (data));
2376 strncpy (data + 32, va_arg (ap, const char *), 16);
2377 strncpy (data + 48, va_arg (ap, const char *), 80);
2378 va_end (ap);
2379 return elfcore_write_note (abfd, buf, bufsiz,
2380 "CORE", note_type, data, sizeof (data));
2381 }
2382
2383 case NT_PRSTATUS:
2384 {
2385 char data[268];
2386 va_list ap;
2387 long pid;
2388 int cursig;
2389 const void *greg;
2390
2391 va_start (ap, note_type);
2392 memset (data, 0, 72);
2393 pid = va_arg (ap, long);
2394 bfd_put_32 (abfd, pid, data + 24);
2395 cursig = va_arg (ap, int);
2396 bfd_put_16 (abfd, cursig, data + 12);
2397 greg = va_arg (ap, const void *);
2398 memcpy (data + 72, greg, 192);
2399 memset (data + 264, 0, 4);
2400 va_end (ap);
2401 return elfcore_write_note (abfd, buf, bufsiz,
2402 "CORE", note_type, data, sizeof (data));
2403 }
2404 }
2405 }
2406
2407 static flagword
2408 ppc_elf_lookup_section_flags (char *flag_name)
2409 {
2410
2411 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2412 return SHF_PPC_VLE;
2413
2414 return 0;
2415 }
2416
2417 /* Return address for Ith PLT stub in section PLT, for relocation REL
2418 or (bfd_vma) -1 if it should not be included. */
2419
2420 static bfd_vma
2421 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2422 const asection *plt ATTRIBUTE_UNUSED,
2423 const arelent *rel)
2424 {
2425 return rel->address;
2426 }
2427
2428 /* Handle a PowerPC specific section when reading an object file. This
2429 is called when bfd_section_from_shdr finds a section with an unknown
2430 type. */
2431
2432 static bfd_boolean
2433 ppc_elf_section_from_shdr (bfd *abfd,
2434 Elf_Internal_Shdr *hdr,
2435 const char *name,
2436 int shindex)
2437 {
2438 asection *newsect;
2439 flagword flags;
2440
2441 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2442 return FALSE;
2443
2444 newsect = hdr->bfd_section;
2445 flags = bfd_get_section_flags (abfd, newsect);
2446 if (hdr->sh_flags & SHF_EXCLUDE)
2447 flags |= SEC_EXCLUDE;
2448
2449 if (hdr->sh_type == SHT_ORDERED)
2450 flags |= SEC_SORT_ENTRIES;
2451
2452 bfd_set_section_flags (abfd, newsect, flags);
2453 return TRUE;
2454 }
2455
2456 /* Set up any other section flags and such that may be necessary. */
2457
2458 static bfd_boolean
2459 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2460 Elf_Internal_Shdr *shdr,
2461 asection *asect)
2462 {
2463 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2464 shdr->sh_type = SHT_ORDERED;
2465
2466 return TRUE;
2467 }
2468
2469 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2470 need to bump up the number of section headers. */
2471
2472 static int
2473 ppc_elf_additional_program_headers (bfd *abfd,
2474 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2475 {
2476 asection *s;
2477 int ret = 0;
2478
2479 s = bfd_get_section_by_name (abfd, ".sbss2");
2480 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2481 ++ret;
2482
2483 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2484 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2485 ++ret;
2486
2487 return ret;
2488 }
2489
2490 /* Modify the segment map for VLE executables. */
2491
2492 bfd_boolean
2493 ppc_elf_modify_segment_map (bfd *abfd,
2494 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2495 {
2496 struct elf_segment_map *m;
2497
2498 /* At this point in the link, output sections have already been sorted by
2499 LMA and assigned to segments. All that is left to do is to ensure
2500 there is no mixing of VLE & non-VLE sections in a text segment.
2501 If we find that case, we split the segment.
2502 We maintain the original output section order. */
2503
2504 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2505 {
2506 struct elf_segment_map *n;
2507 bfd_size_type amt;
2508 unsigned int j, k;
2509 unsigned int p_flags;
2510
2511 if (m->p_type != PT_LOAD || m->count == 0)
2512 continue;
2513
2514 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2515 {
2516 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2517 p_flags |= PF_W;
2518 if ((m->sections[j]->flags & SEC_CODE) != 0)
2519 {
2520 p_flags |= PF_X;
2521 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2522 p_flags |= PF_PPC_VLE;
2523 break;
2524 }
2525 }
2526 if (j != m->count)
2527 while (++j != m->count)
2528 {
2529 unsigned int p_flags1 = PF_R;
2530
2531 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2532 p_flags1 |= PF_W;
2533 if ((m->sections[j]->flags & SEC_CODE) != 0)
2534 {
2535 p_flags1 |= PF_X;
2536 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2537 p_flags1 |= PF_PPC_VLE;
2538 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2539 break;
2540 }
2541 p_flags |= p_flags1;
2542 }
2543 /* If we're splitting a segment which originally contained rw
2544 sections then those sections might now only be in one of the
2545 two parts. So always set p_flags if splitting, even if we
2546 are being called for objcopy with p_flags_valid set. */
2547 if (j != m->count || !m->p_flags_valid)
2548 {
2549 m->p_flags_valid = 1;
2550 m->p_flags = p_flags;
2551 }
2552 if (j == m->count)
2553 continue;
2554
2555 /* Sections 0..j-1 stay in this (current) segment,
2556 the remainder are put in a new segment.
2557 The scan resumes with the new segment. */
2558
2559 amt = sizeof (struct elf_segment_map);
2560 amt += (m->count - j - 1) * sizeof (asection *);
2561 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2562 if (n == NULL)
2563 return FALSE;
2564
2565 n->p_type = PT_LOAD;
2566 n->count = m->count - j;
2567 for (k = 0; k < n->count; ++k)
2568 n->sections[k] = m->sections[j + k];
2569 m->count = j;
2570 m->p_size_valid = 0;
2571 n->next = m->next;
2572 m->next = n;
2573 }
2574
2575 return TRUE;
2576 }
2577
2578 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2579 .PPC.EMB.sbss0 a normal section, and not a bss section so
2580 that the linker doesn't crater when trying to make more than
2581 2 sections. */
2582
2583 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2584 {
2585 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2586 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2587 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2588 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2590 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2591 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2592 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2593 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2594 { NULL, 0, 0, 0, 0 }
2595 };
2596
2597 /* This is what we want for new plt/got. */
2598 static struct bfd_elf_special_section ppc_alt_plt =
2599 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2600
2601 static const struct bfd_elf_special_section *
2602 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2603 {
2604 const struct bfd_elf_special_section *ssect;
2605
2606 /* See if this is one of the special sections. */
2607 if (sec->name == NULL)
2608 return NULL;
2609
2610 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2611 sec->use_rela_p);
2612 if (ssect != NULL)
2613 {
2614 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2615 ssect = &ppc_alt_plt;
2616 return ssect;
2617 }
2618
2619 return _bfd_elf_get_sec_type_attr (abfd, sec);
2620 }
2621 \f
2622 /* Very simple linked list structure for recording apuinfo values. */
2623 typedef struct apuinfo_list
2624 {
2625 struct apuinfo_list *next;
2626 unsigned long value;
2627 }
2628 apuinfo_list;
2629
2630 static apuinfo_list *head;
2631 static bfd_boolean apuinfo_set;
2632
2633 static void
2634 apuinfo_list_init (void)
2635 {
2636 head = NULL;
2637 apuinfo_set = FALSE;
2638 }
2639
2640 static void
2641 apuinfo_list_add (unsigned long value)
2642 {
2643 apuinfo_list *entry = head;
2644
2645 while (entry != NULL)
2646 {
2647 if (entry->value == value)
2648 return;
2649 entry = entry->next;
2650 }
2651
2652 entry = bfd_malloc (sizeof (* entry));
2653 if (entry == NULL)
2654 return;
2655
2656 entry->value = value;
2657 entry->next = head;
2658 head = entry;
2659 }
2660
2661 static unsigned
2662 apuinfo_list_length (void)
2663 {
2664 apuinfo_list *entry;
2665 unsigned long count;
2666
2667 for (entry = head, count = 0;
2668 entry;
2669 entry = entry->next)
2670 ++ count;
2671
2672 return count;
2673 }
2674
2675 static inline unsigned long
2676 apuinfo_list_element (unsigned long number)
2677 {
2678 apuinfo_list * entry;
2679
2680 for (entry = head;
2681 entry && number --;
2682 entry = entry->next)
2683 ;
2684
2685 return entry ? entry->value : 0;
2686 }
2687
2688 static void
2689 apuinfo_list_finish (void)
2690 {
2691 apuinfo_list *entry;
2692
2693 for (entry = head; entry;)
2694 {
2695 apuinfo_list *next = entry->next;
2696 free (entry);
2697 entry = next;
2698 }
2699
2700 head = NULL;
2701 }
2702
2703 /* Scan the input BFDs and create a linked list of
2704 the APUinfo values that will need to be emitted. */
2705
2706 static void
2707 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2708 {
2709 bfd *ibfd;
2710 asection *asec;
2711 char *buffer = NULL;
2712 bfd_size_type largest_input_size = 0;
2713 unsigned i;
2714 unsigned long length;
2715 const char *error_message = NULL;
2716
2717 if (link_info == NULL)
2718 return;
2719
2720 apuinfo_list_init ();
2721
2722 /* Read in the input sections contents. */
2723 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2724 {
2725 unsigned long datum;
2726
2727 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2728 if (asec == NULL)
2729 continue;
2730
2731 /* xgettext:c-format */
2732 error_message = _("corrupt %s section in %B");
2733 length = asec->size;
2734 if (length < 20)
2735 goto fail;
2736
2737 apuinfo_set = TRUE;
2738 if (largest_input_size < asec->size)
2739 {
2740 if (buffer)
2741 free (buffer);
2742 largest_input_size = asec->size;
2743 buffer = bfd_malloc (largest_input_size);
2744 if (!buffer)
2745 return;
2746 }
2747
2748 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2749 || (bfd_bread (buffer, length, ibfd) != length))
2750 {
2751 /* xgettext:c-format */
2752 error_message = _("unable to read in %s section from %B");
2753 goto fail;
2754 }
2755
2756 /* Verify the contents of the header. Note - we have to
2757 extract the values this way in order to allow for a
2758 host whose endian-ness is different from the target. */
2759 datum = bfd_get_32 (ibfd, buffer);
2760 if (datum != sizeof APUINFO_LABEL)
2761 goto fail;
2762
2763 datum = bfd_get_32 (ibfd, buffer + 8);
2764 if (datum != 0x2)
2765 goto fail;
2766
2767 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2768 goto fail;
2769
2770 /* Get the number of bytes used for apuinfo entries. */
2771 datum = bfd_get_32 (ibfd, buffer + 4);
2772 if (datum + 20 != length)
2773 goto fail;
2774
2775 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2776 for (i = 0; i < datum; i += 4)
2777 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2778 }
2779
2780 error_message = NULL;
2781
2782 if (apuinfo_set)
2783 {
2784 /* Compute the size of the output section. */
2785 unsigned num_entries = apuinfo_list_length ();
2786
2787 /* Set the output section size, if it exists. */
2788 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2789
2790 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2791 {
2792 ibfd = abfd;
2793 /* xgettext:c-format */
2794 error_message = _("warning: unable to set size of %s section in %B");
2795 }
2796 }
2797
2798 fail:
2799 if (buffer)
2800 free (buffer);
2801
2802 if (error_message)
2803 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2804 }
2805
2806 /* Prevent the output section from accumulating the input sections'
2807 contents. We have already stored this in our linked list structure. */
2808
2809 static bfd_boolean
2810 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2811 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2812 asection *asec,
2813 bfd_byte *contents ATTRIBUTE_UNUSED)
2814 {
2815 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2816 }
2817
2818 /* Finally we can generate the output section. */
2819
2820 static void
2821 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2822 {
2823 bfd_byte *buffer;
2824 asection *asec;
2825 unsigned i;
2826 unsigned num_entries;
2827 bfd_size_type length;
2828
2829 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2830 if (asec == NULL)
2831 return;
2832
2833 if (!apuinfo_set)
2834 return;
2835
2836 length = asec->size;
2837 if (length < 20)
2838 return;
2839
2840 buffer = bfd_malloc (length);
2841 if (buffer == NULL)
2842 {
2843 _bfd_error_handler
2844 (_("failed to allocate space for new APUinfo section."));
2845 return;
2846 }
2847
2848 /* Create the apuinfo header. */
2849 num_entries = apuinfo_list_length ();
2850 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2851 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2852 bfd_put_32 (abfd, 0x2, buffer + 8);
2853 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2854
2855 length = 20;
2856 for (i = 0; i < num_entries; i++)
2857 {
2858 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2859 length += 4;
2860 }
2861
2862 if (length != asec->size)
2863 _bfd_error_handler (_("failed to compute new APUinfo section."));
2864
2865 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2866 _bfd_error_handler (_("failed to install new APUinfo section."));
2867
2868 free (buffer);
2869
2870 apuinfo_list_finish ();
2871 }
2872 \f
2873 static bfd_boolean
2874 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2875 {
2876 bfd_byte buf[GLINK_ENTRY_SIZE];
2877
2878 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2879 return FALSE;
2880
2881 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2882 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2883 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2884 && bfd_get_32 (abfd, buf + 12) == BCTR);
2885 }
2886
2887 static bfd_boolean
2888 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2889 {
2890 bfd_vma vma = *(bfd_vma *) ptr;
2891 return ((section->flags & SEC_ALLOC) != 0
2892 && section->vma <= vma
2893 && vma < section->vma + section->size);
2894 }
2895
2896 static long
2897 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2898 long dynsymcount, asymbol **dynsyms,
2899 asymbol **ret)
2900 {
2901 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2902 asection *plt, *relplt, *dynamic, *glink;
2903 bfd_vma glink_vma = 0;
2904 bfd_vma resolv_vma = 0;
2905 bfd_vma stub_vma;
2906 asymbol *s;
2907 arelent *p;
2908 long count, i;
2909 size_t size;
2910 char *names;
2911 bfd_byte buf[4];
2912
2913 *ret = NULL;
2914
2915 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2916 return 0;
2917
2918 if (dynsymcount <= 0)
2919 return 0;
2920
2921 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2922 if (relplt == NULL)
2923 return 0;
2924
2925 plt = bfd_get_section_by_name (abfd, ".plt");
2926 if (plt == NULL)
2927 return 0;
2928
2929 /* Call common code to handle old-style executable PLTs. */
2930 if (elf_section_flags (plt) & SHF_EXECINSTR)
2931 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2932 dynsymcount, dynsyms, ret);
2933
2934 /* If this object was prelinked, the prelinker stored the address
2935 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2936 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2937 if (dynamic != NULL)
2938 {
2939 bfd_byte *dynbuf, *extdyn, *extdynend;
2940 size_t extdynsize;
2941 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2942
2943 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2944 return -1;
2945
2946 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2947 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2948
2949 extdyn = dynbuf;
2950 extdynend = extdyn + dynamic->size;
2951 for (; extdyn < extdynend; extdyn += extdynsize)
2952 {
2953 Elf_Internal_Dyn dyn;
2954 (*swap_dyn_in) (abfd, extdyn, &dyn);
2955
2956 if (dyn.d_tag == DT_NULL)
2957 break;
2958
2959 if (dyn.d_tag == DT_PPC_GOT)
2960 {
2961 unsigned int g_o_t = dyn.d_un.d_val;
2962 asection *got = bfd_get_section_by_name (abfd, ".got");
2963 if (got != NULL
2964 && bfd_get_section_contents (abfd, got, buf,
2965 g_o_t - got->vma + 4, 4))
2966 glink_vma = bfd_get_32 (abfd, buf);
2967 break;
2968 }
2969 }
2970 free (dynbuf);
2971 }
2972
2973 /* Otherwise we read the first plt entry. */
2974 if (glink_vma == 0)
2975 {
2976 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2977 glink_vma = bfd_get_32 (abfd, buf);
2978 }
2979
2980 if (glink_vma == 0)
2981 return 0;
2982
2983 /* The .glink section usually does not survive the final
2984 link; search for the section (usually .text) where the
2985 glink stubs now reside. */
2986 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2987 if (glink == NULL)
2988 return 0;
2989
2990 /* Determine glink PLT resolver by reading the relative branch
2991 from the first glink stub. */
2992 if (bfd_get_section_contents (abfd, glink, buf,
2993 glink_vma - glink->vma, 4))
2994 {
2995 unsigned int insn = bfd_get_32 (abfd, buf);
2996
2997 /* The first glink stub may either branch to the resolver ... */
2998 insn ^= B;
2999 if ((insn & ~0x3fffffc) == 0)
3000 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3001
3002 /* ... or fall through a bunch of NOPs. */
3003 else if ((insn ^ B ^ NOP) == 0)
3004 for (i = 4;
3005 bfd_get_section_contents (abfd, glink, buf,
3006 glink_vma - glink->vma + i, 4);
3007 i += 4)
3008 if (bfd_get_32 (abfd, buf) != NOP)
3009 {
3010 resolv_vma = glink_vma + i;
3011 break;
3012 }
3013 }
3014
3015 count = relplt->size / sizeof (Elf32_External_Rela);
3016 /* If the stubs are those for -shared/-pie then we might have
3017 multiple stubs for each plt entry. If that is the case then
3018 there is no way to associate stubs with their plt entries short
3019 of figuring out the GOT pointer value used in the stub. */
3020 if (!is_nonpic_glink_stub (abfd, glink,
3021 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3022 return 0;
3023
3024 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3025 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3026 return -1;
3027
3028 size = count * sizeof (asymbol);
3029 p = relplt->relocation;
3030 for (i = 0; i < count; i++, p++)
3031 {
3032 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3033 if (p->addend != 0)
3034 size += sizeof ("+0x") - 1 + 8;
3035 }
3036
3037 size += sizeof (asymbol) + sizeof ("__glink");
3038
3039 if (resolv_vma)
3040 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3041
3042 s = *ret = bfd_malloc (size);
3043 if (s == NULL)
3044 return -1;
3045
3046 stub_vma = glink_vma;
3047 names = (char *) (s + count + 1 + (resolv_vma != 0));
3048 p = relplt->relocation + count - 1;
3049 for (i = 0; i < count; i++)
3050 {
3051 size_t len;
3052
3053 *s = **p->sym_ptr_ptr;
3054 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3055 we are defining a symbol, ensure one of them is set. */
3056 if ((s->flags & BSF_LOCAL) == 0)
3057 s->flags |= BSF_GLOBAL;
3058 s->flags |= BSF_SYNTHETIC;
3059 s->section = glink;
3060 stub_vma -= 16;
3061 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3062 stub_vma -= 32;
3063 s->value = stub_vma - glink->vma;
3064 s->name = names;
3065 s->udata.p = NULL;
3066 len = strlen ((*p->sym_ptr_ptr)->name);
3067 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3068 names += len;
3069 if (p->addend != 0)
3070 {
3071 memcpy (names, "+0x", sizeof ("+0x") - 1);
3072 names += sizeof ("+0x") - 1;
3073 bfd_sprintf_vma (abfd, names, p->addend);
3074 names += strlen (names);
3075 }
3076 memcpy (names, "@plt", sizeof ("@plt"));
3077 names += sizeof ("@plt");
3078 ++s;
3079 --p;
3080 }
3081
3082 /* Add a symbol at the start of the glink branch table. */
3083 memset (s, 0, sizeof *s);
3084 s->the_bfd = abfd;
3085 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3086 s->section = glink;
3087 s->value = glink_vma - glink->vma;
3088 s->name = names;
3089 memcpy (names, "__glink", sizeof ("__glink"));
3090 names += sizeof ("__glink");
3091 s++;
3092 count++;
3093
3094 if (resolv_vma)
3095 {
3096 /* Add a symbol for the glink PLT resolver. */
3097 memset (s, 0, sizeof *s);
3098 s->the_bfd = abfd;
3099 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3100 s->section = glink;
3101 s->value = resolv_vma - glink->vma;
3102 s->name = names;
3103 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3104 names += sizeof ("__glink_PLTresolve");
3105 s++;
3106 count++;
3107 }
3108
3109 return count;
3110 }
3111 \f
3112 /* The following functions are specific to the ELF linker, while
3113 functions above are used generally. They appear in this file more
3114 or less in the order in which they are called. eg.
3115 ppc_elf_check_relocs is called early in the link process,
3116 ppc_elf_finish_dynamic_sections is one of the last functions
3117 called. */
3118
3119 /* Track PLT entries needed for a given symbol. We might need more
3120 than one glink entry per symbol when generating a pic binary. */
3121 struct plt_entry
3122 {
3123 struct plt_entry *next;
3124
3125 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3126 This field stores the offset into .got2 used to initialise the
3127 GOT pointer reg. It will always be at least 32768. (Current
3128 gcc always uses an offset of 32768, but ld -r will pack .got2
3129 sections together resulting in larger offsets). */
3130 bfd_vma addend;
3131
3132 /* The .got2 section. */
3133 asection *sec;
3134
3135 /* PLT refcount or offset. */
3136 union
3137 {
3138 bfd_signed_vma refcount;
3139 bfd_vma offset;
3140 } plt;
3141
3142 /* .glink stub offset. */
3143 bfd_vma glink_offset;
3144 };
3145
3146 /* Of those relocs that might be copied as dynamic relocs, this
3147 function selects those that must be copied when linking a shared
3148 library or PIE, even when the symbol is local. */
3149
3150 static int
3151 must_be_dyn_reloc (struct bfd_link_info *info,
3152 enum elf_ppc_reloc_type r_type)
3153 {
3154 switch (r_type)
3155 {
3156 default:
3157 /* Only relative relocs can be resolved when the object load
3158 address isn't fixed. DTPREL32 is excluded because the
3159 dynamic linker needs to differentiate global dynamic from
3160 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3161 return 1;
3162
3163 case R_PPC_REL24:
3164 case R_PPC_REL14:
3165 case R_PPC_REL14_BRTAKEN:
3166 case R_PPC_REL14_BRNTAKEN:
3167 case R_PPC_REL32:
3168 return 0;
3169
3170 case R_PPC_TPREL32:
3171 case R_PPC_TPREL16:
3172 case R_PPC_TPREL16_LO:
3173 case R_PPC_TPREL16_HI:
3174 case R_PPC_TPREL16_HA:
3175 /* These relocations are relative but in a shared library the
3176 linker doesn't know the thread pointer base. */
3177 return bfd_link_dll (info);
3178 }
3179 }
3180
3181 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3182 copying dynamic variables from a shared lib into an app's dynbss
3183 section, and instead use a dynamic relocation to point into the
3184 shared lib. */
3185 #define ELIMINATE_COPY_RELOCS 1
3186
3187 /* Used to track dynamic relocations for local symbols. */
3188 struct ppc_dyn_relocs
3189 {
3190 struct ppc_dyn_relocs *next;
3191
3192 /* The input section of the reloc. */
3193 asection *sec;
3194
3195 /* Total number of relocs copied for the input section. */
3196 unsigned int count : 31;
3197
3198 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3199 unsigned int ifunc : 1;
3200 };
3201
3202 /* PPC ELF linker hash entry. */
3203
3204 struct ppc_elf_link_hash_entry
3205 {
3206 struct elf_link_hash_entry elf;
3207
3208 /* If this symbol is used in the linker created sections, the processor
3209 specific backend uses this field to map the field into the offset
3210 from the beginning of the section. */
3211 elf_linker_section_pointers_t *linker_section_pointer;
3212
3213 /* Track dynamic relocs copied for this symbol. */
3214 struct elf_dyn_relocs *dyn_relocs;
3215
3216 /* Contexts in which symbol is used in the GOT (or TOC).
3217 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3218 corresponding relocs are encountered during check_relocs.
3219 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3220 indicate the corresponding GOT entry type is not needed. */
3221 #define TLS_GD 1 /* GD reloc. */
3222 #define TLS_LD 2 /* LD reloc. */
3223 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3224 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3225 #define TLS_TLS 16 /* Any TLS reloc. */
3226 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3227 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3228 char tls_mask;
3229
3230 /* Nonzero if we have seen a small data relocation referring to this
3231 symbol. */
3232 unsigned char has_sda_refs : 1;
3233
3234 /* Flag use of given relocations. */
3235 unsigned char has_addr16_ha : 1;
3236 unsigned char has_addr16_lo : 1;
3237 };
3238
3239 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3240
3241 /* PPC ELF linker hash table. */
3242
3243 struct ppc_elf_link_hash_table
3244 {
3245 struct elf_link_hash_table elf;
3246
3247 /* Various options passed from the linker. */
3248 struct ppc_elf_params *params;
3249
3250 /* Short-cuts to get to dynamic linker sections. */
3251 asection *glink;
3252 asection *dynsbss;
3253 asection *relsbss;
3254 elf_linker_section_t sdata[2];
3255 asection *sbss;
3256 asection *glink_eh_frame;
3257
3258 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3259 asection *srelplt2;
3260
3261 /* Shortcut to __tls_get_addr. */
3262 struct elf_link_hash_entry *tls_get_addr;
3263
3264 /* The bfd that forced an old-style PLT. */
3265 bfd *old_bfd;
3266
3267 /* TLS local dynamic got entry handling. */
3268 union {
3269 bfd_signed_vma refcount;
3270 bfd_vma offset;
3271 } tlsld_got;
3272
3273 /* Offset of branch table to PltResolve function in glink. */
3274 bfd_vma glink_pltresolve;
3275
3276 /* Size of reserved GOT entries. */
3277 unsigned int got_header_size;
3278 /* Non-zero if allocating the header left a gap. */
3279 unsigned int got_gap;
3280
3281 /* The type of PLT we have chosen to use. */
3282 enum ppc_elf_plt_type plt_type;
3283
3284 /* True if the target system is VxWorks. */
3285 unsigned int is_vxworks:1;
3286
3287 /* Whether there exist local gnu indirect function resolvers,
3288 referenced by dynamic relocations. */
3289 unsigned int local_ifunc_resolver:1;
3290 unsigned int maybe_local_ifunc_resolver:1;
3291
3292 /* Set if tls optimization is enabled. */
3293 unsigned int do_tls_opt:1;
3294
3295 /* The size of PLT entries. */
3296 int plt_entry_size;
3297 /* The distance between adjacent PLT slots. */
3298 int plt_slot_size;
3299 /* The size of the first PLT entry. */
3300 int plt_initial_entry_size;
3301
3302 /* Small local sym cache. */
3303 struct sym_cache sym_cache;
3304 };
3305
3306 /* Rename some of the generic section flags to better document how they
3307 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3308
3309 /* Nonzero if this section has TLS related relocations. */
3310 #define has_tls_reloc sec_flg0
3311
3312 /* Nonzero if this section has a call to __tls_get_addr. */
3313 #define has_tls_get_addr_call sec_flg1
3314
3315 /* Get the PPC ELF linker hash table from a link_info structure. */
3316
3317 #define ppc_elf_hash_table(p) \
3318 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3319 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3320
3321 /* Create an entry in a PPC ELF linker hash table. */
3322
3323 static struct bfd_hash_entry *
3324 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3325 struct bfd_hash_table *table,
3326 const char *string)
3327 {
3328 /* Allocate the structure if it has not already been allocated by a
3329 subclass. */
3330 if (entry == NULL)
3331 {
3332 entry = bfd_hash_allocate (table,
3333 sizeof (struct ppc_elf_link_hash_entry));
3334 if (entry == NULL)
3335 return entry;
3336 }
3337
3338 /* Call the allocation method of the superclass. */
3339 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3340 if (entry != NULL)
3341 {
3342 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3343 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3344 ppc_elf_hash_entry (entry)->tls_mask = 0;
3345 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3346 }
3347
3348 return entry;
3349 }
3350
3351 /* Create a PPC ELF linker hash table. */
3352
3353 static struct bfd_link_hash_table *
3354 ppc_elf_link_hash_table_create (bfd *abfd)
3355 {
3356 struct ppc_elf_link_hash_table *ret;
3357 static struct ppc_elf_params default_params
3358 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3359
3360 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3361 if (ret == NULL)
3362 return NULL;
3363
3364 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3365 ppc_elf_link_hash_newfunc,
3366 sizeof (struct ppc_elf_link_hash_entry),
3367 PPC32_ELF_DATA))
3368 {
3369 free (ret);
3370 return NULL;
3371 }
3372
3373 ret->elf.init_plt_refcount.refcount = 0;
3374 ret->elf.init_plt_refcount.glist = NULL;
3375 ret->elf.init_plt_offset.offset = 0;
3376 ret->elf.init_plt_offset.glist = NULL;
3377
3378 ret->params = &default_params;
3379
3380 ret->sdata[0].name = ".sdata";
3381 ret->sdata[0].sym_name = "_SDA_BASE_";
3382 ret->sdata[0].bss_name = ".sbss";
3383
3384 ret->sdata[1].name = ".sdata2";
3385 ret->sdata[1].sym_name = "_SDA2_BASE_";
3386 ret->sdata[1].bss_name = ".sbss2";
3387
3388 ret->plt_entry_size = 12;
3389 ret->plt_slot_size = 8;
3390 ret->plt_initial_entry_size = 72;
3391
3392 return &ret->elf.root;
3393 }
3394
3395 /* Hook linker params into hash table. */
3396
3397 void
3398 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3399 {
3400 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3401
3402 if (htab)
3403 htab->params = params;
3404 params->pagesize_p2 = bfd_log2 (params->pagesize);
3405 }
3406
3407 /* Create .got and the related sections. */
3408
3409 static bfd_boolean
3410 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3411 {
3412 struct ppc_elf_link_hash_table *htab;
3413
3414 if (!_bfd_elf_create_got_section (abfd, info))
3415 return FALSE;
3416
3417 htab = ppc_elf_hash_table (info);
3418 if (!htab->is_vxworks)
3419 {
3420 /* The powerpc .got has a blrl instruction in it. Mark it
3421 executable. */
3422 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3423 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3424 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3425 return FALSE;
3426 }
3427
3428 return TRUE;
3429 }
3430
3431 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3432 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3433 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3434
3435 static bfd_boolean
3436 ppc_elf_create_linker_section (bfd *abfd,
3437 struct bfd_link_info *info,
3438 flagword flags,
3439 elf_linker_section_t *lsect)
3440 {
3441 asection *s;
3442
3443 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3444 | SEC_LINKER_CREATED);
3445
3446 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3447 if (s == NULL)
3448 return FALSE;
3449 lsect->section = s;
3450
3451 /* Define the sym on the first section of this name. */
3452 s = bfd_get_section_by_name (abfd, lsect->name);
3453
3454 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3455 if (lsect->sym == NULL)
3456 return FALSE;
3457 lsect->sym->root.u.def.value = 0x8000;
3458 return TRUE;
3459 }
3460
3461 static bfd_boolean
3462 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3463 {
3464 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3465 asection *s;
3466 flagword flags;
3467
3468 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3469 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3470 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3471 htab->glink = s;
3472 if (s == NULL
3473 || !bfd_set_section_alignment (abfd, s,
3474 htab->params->ppc476_workaround ? 6 : 4))
3475 return FALSE;
3476
3477 if (!info->no_ld_generated_unwind_info)
3478 {
3479 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3480 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3481 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3482 htab->glink_eh_frame = s;
3483 if (s == NULL
3484 || !bfd_set_section_alignment (abfd, s, 2))
3485 return FALSE;
3486 }
3487
3488 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3489 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3490 htab->elf.iplt = s;
3491 if (s == NULL
3492 || !bfd_set_section_alignment (abfd, s, 4))
3493 return FALSE;
3494
3495 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3497 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3498 htab->elf.irelplt = s;
3499 if (s == NULL
3500 || ! bfd_set_section_alignment (abfd, s, 2))
3501 return FALSE;
3502
3503 if (!ppc_elf_create_linker_section (abfd, info, 0,
3504 &htab->sdata[0]))
3505 return FALSE;
3506
3507 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3508 &htab->sdata[1]))
3509 return FALSE;
3510
3511 return TRUE;
3512 }
3513
3514 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3515 to output sections (just like _bfd_elf_create_dynamic_sections has
3516 to create .dynbss and .rela.bss). */
3517
3518 static bfd_boolean
3519 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3520 {
3521 struct ppc_elf_link_hash_table *htab;
3522 asection *s;
3523 flagword flags;
3524
3525 htab = ppc_elf_hash_table (info);
3526
3527 if (htab->elf.sgot == NULL
3528 && !ppc_elf_create_got (abfd, info))
3529 return FALSE;
3530
3531 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3532 return FALSE;
3533
3534 if (htab->glink == NULL
3535 && !ppc_elf_create_glink (abfd, info))
3536 return FALSE;
3537
3538 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3539 SEC_ALLOC | SEC_LINKER_CREATED);
3540 htab->dynsbss = s;
3541 if (s == NULL)
3542 return FALSE;
3543
3544 if (! bfd_link_pic (info))
3545 {
3546 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3547 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3548 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3549 htab->relsbss = s;
3550 if (s == NULL
3551 || ! bfd_set_section_alignment (abfd, s, 2))
3552 return FALSE;
3553 }
3554
3555 if (htab->is_vxworks
3556 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3557 return FALSE;
3558
3559 s = htab->elf.splt;
3560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3561 if (htab->plt_type == PLT_VXWORKS)
3562 /* The VxWorks PLT is a loaded section with contents. */
3563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3564 return bfd_set_section_flags (abfd, s, flags);
3565 }
3566
3567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3568
3569 static void
3570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3571 struct elf_link_hash_entry *dir,
3572 struct elf_link_hash_entry *ind)
3573 {
3574 struct ppc_elf_link_hash_entry *edir, *eind;
3575
3576 edir = (struct ppc_elf_link_hash_entry *) dir;
3577 eind = (struct ppc_elf_link_hash_entry *) ind;
3578
3579 edir->tls_mask |= eind->tls_mask;
3580 edir->has_sda_refs |= eind->has_sda_refs;
3581
3582 /* If called to transfer flags for a weakdef during processing
3583 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3584 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3585 if (!(ELIMINATE_COPY_RELOCS
3586 && eind->elf.root.type != bfd_link_hash_indirect
3587 && edir->elf.dynamic_adjusted))
3588 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3589
3590 if (edir->elf.versioned != versioned_hidden)
3591 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3592 edir->elf.ref_regular |= eind->elf.ref_regular;
3593 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3594 edir->elf.needs_plt |= eind->elf.needs_plt;
3595 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3596
3597 if (eind->dyn_relocs != NULL)
3598 {
3599 if (edir->dyn_relocs != NULL)
3600 {
3601 struct elf_dyn_relocs **pp;
3602 struct elf_dyn_relocs *p;
3603
3604 /* Add reloc counts against the indirect sym to the direct sym
3605 list. Merge any entries against the same section. */
3606 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3607 {
3608 struct elf_dyn_relocs *q;
3609
3610 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3611 if (q->sec == p->sec)
3612 {
3613 q->pc_count += p->pc_count;
3614 q->count += p->count;
3615 *pp = p->next;
3616 break;
3617 }
3618 if (q == NULL)
3619 pp = &p->next;
3620 }
3621 *pp = edir->dyn_relocs;
3622 }
3623
3624 edir->dyn_relocs = eind->dyn_relocs;
3625 eind->dyn_relocs = NULL;
3626 }
3627
3628 /* If we were called to copy over info for a weak sym, that's all.
3629 You might think dyn_relocs need not be copied over; After all,
3630 both syms will be dynamic or both non-dynamic so we're just
3631 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3632 code in ppc_elf_adjust_dynamic_symbol needs to check for
3633 dyn_relocs in read-only sections, and it does so on what is the
3634 DIR sym here. */
3635 if (eind->elf.root.type != bfd_link_hash_indirect)
3636 return;
3637
3638 /* Copy over the GOT refcount entries that we may have already seen to
3639 the symbol which just became indirect. */
3640 edir->elf.got.refcount += eind->elf.got.refcount;
3641 eind->elf.got.refcount = 0;
3642
3643 /* And plt entries. */
3644 if (eind->elf.plt.plist != NULL)
3645 {
3646 if (edir->elf.plt.plist != NULL)
3647 {
3648 struct plt_entry **entp;
3649 struct plt_entry *ent;
3650
3651 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3652 {
3653 struct plt_entry *dent;
3654
3655 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3656 if (dent->sec == ent->sec && dent->addend == ent->addend)
3657 {
3658 dent->plt.refcount += ent->plt.refcount;
3659 *entp = ent->next;
3660 break;
3661 }
3662 if (dent == NULL)
3663 entp = &ent->next;
3664 }
3665 *entp = edir->elf.plt.plist;
3666 }
3667
3668 edir->elf.plt.plist = eind->elf.plt.plist;
3669 eind->elf.plt.plist = NULL;
3670 }
3671
3672 if (eind->elf.dynindx != -1)
3673 {
3674 if (edir->elf.dynindx != -1)
3675 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3676 edir->elf.dynstr_index);
3677 edir->elf.dynindx = eind->elf.dynindx;
3678 edir->elf.dynstr_index = eind->elf.dynstr_index;
3679 eind->elf.dynindx = -1;
3680 eind->elf.dynstr_index = 0;
3681 }
3682 }
3683
3684 /* Hook called by the linker routine which adds symbols from an object
3685 file. We use it to put .comm items in .sbss, and not .bss. */
3686
3687 static bfd_boolean
3688 ppc_elf_add_symbol_hook (bfd *abfd,
3689 struct bfd_link_info *info,
3690 Elf_Internal_Sym *sym,
3691 const char **namep ATTRIBUTE_UNUSED,
3692 flagword *flagsp ATTRIBUTE_UNUSED,
3693 asection **secp,
3694 bfd_vma *valp)
3695 {
3696 if (sym->st_shndx == SHN_COMMON
3697 && !bfd_link_relocatable (info)
3698 && is_ppc_elf (info->output_bfd)
3699 && sym->st_size <= elf_gp_size (abfd))
3700 {
3701 /* Common symbols less than or equal to -G nn bytes are automatically
3702 put into .sbss. */
3703 struct ppc_elf_link_hash_table *htab;
3704
3705 htab = ppc_elf_hash_table (info);
3706 if (htab->sbss == NULL)
3707 {
3708 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3709
3710 if (!htab->elf.dynobj)
3711 htab->elf.dynobj = abfd;
3712
3713 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3714 ".sbss",
3715 flags);
3716 if (htab->sbss == NULL)
3717 return FALSE;
3718 }
3719
3720 *secp = htab->sbss;
3721 *valp = sym->st_size;
3722 }
3723
3724 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3725 && (abfd->flags & DYNAMIC) == 0
3726 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3727 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3728
3729 return TRUE;
3730 }
3731 \f
3732 /* Find a linker generated pointer with a given addend and type. */
3733
3734 static elf_linker_section_pointers_t *
3735 elf_find_pointer_linker_section
3736 (elf_linker_section_pointers_t *linker_pointers,
3737 bfd_vma addend,
3738 elf_linker_section_t *lsect)
3739 {
3740 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3741 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3742 return linker_pointers;
3743
3744 return NULL;
3745 }
3746
3747 /* Allocate a pointer to live in a linker created section. */
3748
3749 static bfd_boolean
3750 elf_allocate_pointer_linker_section (bfd *abfd,
3751 elf_linker_section_t *lsect,
3752 struct elf_link_hash_entry *h,
3753 const Elf_Internal_Rela *rel)
3754 {
3755 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3756 elf_linker_section_pointers_t *linker_section_ptr;
3757 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3758 bfd_size_type amt;
3759
3760 BFD_ASSERT (lsect != NULL);
3761
3762 /* Is this a global symbol? */
3763 if (h != NULL)
3764 {
3765 struct ppc_elf_link_hash_entry *eh;
3766
3767 /* Has this symbol already been allocated? If so, our work is done. */
3768 eh = (struct ppc_elf_link_hash_entry *) h;
3769 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3770 rel->r_addend,
3771 lsect))
3772 return TRUE;
3773
3774 ptr_linker_section_ptr = &eh->linker_section_pointer;
3775 }
3776 else
3777 {
3778 BFD_ASSERT (is_ppc_elf (abfd));
3779
3780 /* Allocation of a pointer to a local symbol. */
3781 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3782
3783 /* Allocate a table to hold the local symbols if first time. */
3784 if (!ptr)
3785 {
3786 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3787
3788 amt = num_symbols;
3789 amt *= sizeof (elf_linker_section_pointers_t *);
3790 ptr = bfd_zalloc (abfd, amt);
3791
3792 if (!ptr)
3793 return FALSE;
3794
3795 elf_local_ptr_offsets (abfd) = ptr;
3796 }
3797
3798 /* Has this symbol already been allocated? If so, our work is done. */
3799 if (elf_find_pointer_linker_section (ptr[r_symndx],
3800 rel->r_addend,
3801 lsect))
3802 return TRUE;
3803
3804 ptr_linker_section_ptr = &ptr[r_symndx];
3805 }
3806
3807 /* Allocate space for a pointer in the linker section, and allocate
3808 a new pointer record from internal memory. */
3809 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3810 amt = sizeof (elf_linker_section_pointers_t);
3811 linker_section_ptr = bfd_alloc (abfd, amt);
3812
3813 if (!linker_section_ptr)
3814 return FALSE;
3815
3816 linker_section_ptr->next = *ptr_linker_section_ptr;
3817 linker_section_ptr->addend = rel->r_addend;
3818 linker_section_ptr->lsect = lsect;
3819 *ptr_linker_section_ptr = linker_section_ptr;
3820
3821 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3822 return FALSE;
3823 linker_section_ptr->offset = lsect->section->size;
3824 lsect->section->size += 4;
3825
3826 #ifdef DEBUG
3827 fprintf (stderr,
3828 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3829 lsect->name, (long) linker_section_ptr->offset,
3830 (long) lsect->section->size);
3831 #endif
3832
3833 return TRUE;
3834 }
3835
3836 static struct plt_entry **
3837 update_local_sym_info (bfd *abfd,
3838 Elf_Internal_Shdr *symtab_hdr,
3839 unsigned long r_symndx,
3840 int tls_type)
3841 {
3842 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3843 struct plt_entry **local_plt;
3844 char *local_got_tls_masks;
3845
3846 if (local_got_refcounts == NULL)
3847 {
3848 bfd_size_type size = symtab_hdr->sh_info;
3849
3850 size *= (sizeof (*local_got_refcounts)
3851 + sizeof (*local_plt)
3852 + sizeof (*local_got_tls_masks));
3853 local_got_refcounts = bfd_zalloc (abfd, size);
3854 if (local_got_refcounts == NULL)
3855 return NULL;
3856 elf_local_got_refcounts (abfd) = local_got_refcounts;
3857 }
3858
3859 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3860 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3861 local_got_tls_masks[r_symndx] |= tls_type;
3862 if (tls_type != PLT_IFUNC)
3863 local_got_refcounts[r_symndx] += 1;
3864 return local_plt + r_symndx;
3865 }
3866
3867 static bfd_boolean
3868 update_plt_info (bfd *abfd, struct plt_entry **plist,
3869 asection *sec, bfd_vma addend)
3870 {
3871 struct plt_entry *ent;
3872
3873 if (addend < 32768)
3874 sec = NULL;
3875 for (ent = *plist; ent != NULL; ent = ent->next)
3876 if (ent->sec == sec && ent->addend == addend)
3877 break;
3878 if (ent == NULL)
3879 {
3880 bfd_size_type amt = sizeof (*ent);
3881 ent = bfd_alloc (abfd, amt);
3882 if (ent == NULL)
3883 return FALSE;
3884 ent->next = *plist;
3885 ent->sec = sec;
3886 ent->addend = addend;
3887 ent->plt.refcount = 0;
3888 *plist = ent;
3889 }
3890 ent->plt.refcount += 1;
3891 return TRUE;
3892 }
3893
3894 static struct plt_entry *
3895 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3896 {
3897 struct plt_entry *ent;
3898
3899 if (addend < 32768)
3900 sec = NULL;
3901 for (ent = *plist; ent != NULL; ent = ent->next)
3902 if (ent->sec == sec && ent->addend == addend)
3903 break;
3904 return ent;
3905 }
3906
3907 static bfd_boolean
3908 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3909 {
3910 return (r_type == R_PPC_PLTREL24
3911 || r_type == R_PPC_LOCAL24PC
3912 || r_type == R_PPC_REL24
3913 || r_type == R_PPC_REL14
3914 || r_type == R_PPC_REL14_BRTAKEN
3915 || r_type == R_PPC_REL14_BRNTAKEN
3916 || r_type == R_PPC_ADDR24
3917 || r_type == R_PPC_ADDR14
3918 || r_type == R_PPC_ADDR14_BRTAKEN
3919 || r_type == R_PPC_ADDR14_BRNTAKEN
3920 || r_type == R_PPC_VLE_REL24);
3921 }
3922
3923 static void
3924 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3925 {
3926 _bfd_error_handler
3927 /* xgettext:c-format */
3928 (_("%B: relocation %s cannot be used when making a shared object"),
3929 abfd,
3930 ppc_elf_howto_table[r_type]->name);
3931 bfd_set_error (bfd_error_bad_value);
3932 }
3933
3934 /* Look through the relocs for a section during the first phase, and
3935 allocate space in the global offset table or procedure linkage
3936 table. */
3937
3938 static bfd_boolean
3939 ppc_elf_check_relocs (bfd *abfd,
3940 struct bfd_link_info *info,
3941 asection *sec,
3942 const Elf_Internal_Rela *relocs)
3943 {
3944 struct ppc_elf_link_hash_table *htab;
3945 Elf_Internal_Shdr *symtab_hdr;
3946 struct elf_link_hash_entry **sym_hashes;
3947 const Elf_Internal_Rela *rel;
3948 const Elf_Internal_Rela *rel_end;
3949 asection *got2, *sreloc;
3950 struct elf_link_hash_entry *tga;
3951
3952 if (bfd_link_relocatable (info))
3953 return TRUE;
3954
3955 /* Don't do anything special with non-loaded, non-alloced sections.
3956 In particular, any relocs in such sections should not affect GOT
3957 and PLT reference counting (ie. we don't allow them to create GOT
3958 or PLT entries), there's no possibility or desire to optimize TLS
3959 relocs, and there's not much point in propagating relocs to shared
3960 libs that the dynamic linker won't relocate. */
3961 if ((sec->flags & SEC_ALLOC) == 0)
3962 return TRUE;
3963
3964 #ifdef DEBUG
3965 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3966 sec, abfd);
3967 #endif
3968
3969 BFD_ASSERT (is_ppc_elf (abfd));
3970
3971 /* Initialize howto table if not already done. */
3972 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3973 ppc_elf_howto_init ();
3974
3975 htab = ppc_elf_hash_table (info);
3976 if (htab->glink == NULL)
3977 {
3978 if (htab->elf.dynobj == NULL)
3979 htab->elf.dynobj = abfd;
3980 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3981 return FALSE;
3982 }
3983 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3984 FALSE, FALSE, TRUE);
3985 symtab_hdr = &elf_symtab_hdr (abfd);
3986 sym_hashes = elf_sym_hashes (abfd);
3987 got2 = bfd_get_section_by_name (abfd, ".got2");
3988 sreloc = NULL;
3989
3990 rel_end = relocs + sec->reloc_count;
3991 for (rel = relocs; rel < rel_end; rel++)
3992 {
3993 unsigned long r_symndx;
3994 enum elf_ppc_reloc_type r_type;
3995 struct elf_link_hash_entry *h;
3996 int tls_type;
3997 struct plt_entry **ifunc;
3998
3999 r_symndx = ELF32_R_SYM (rel->r_info);
4000 if (r_symndx < symtab_hdr->sh_info)
4001 h = NULL;
4002 else
4003 {
4004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4005 while (h->root.type == bfd_link_hash_indirect
4006 || h->root.type == bfd_link_hash_warning)
4007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4008
4009 /* PR15323, ref flags aren't set for references in the same
4010 object. */
4011 h->root.non_ir_ref_regular = 1;
4012 }
4013
4014 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4015 This shows up in particular in an R_PPC_ADDR32 in the eabi
4016 startup code. */
4017 if (h != NULL
4018 && htab->elf.sgot == NULL
4019 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4020 {
4021 if (htab->elf.dynobj == NULL)
4022 htab->elf.dynobj = abfd;
4023 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4024 return FALSE;
4025 BFD_ASSERT (h == htab->elf.hgot);
4026 }
4027
4028 tls_type = 0;
4029 r_type = ELF32_R_TYPE (rel->r_info);
4030 ifunc = NULL;
4031 if (h == NULL && !htab->is_vxworks)
4032 {
4033 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4034 abfd, r_symndx);
4035 if (isym == NULL)
4036 return FALSE;
4037
4038 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4039 {
4040 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4041 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4042 PLT_IFUNC);
4043 if (ifunc == NULL)
4044 return FALSE;
4045
4046 /* STT_GNU_IFUNC symbols must have a PLT entry;
4047 In a non-pie executable even when there are
4048 no plt calls. */
4049 if (!bfd_link_pic (info)
4050 || is_branch_reloc (r_type))
4051 {
4052 bfd_vma addend = 0;
4053 if (r_type == R_PPC_PLTREL24)
4054 {
4055 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4056 if (bfd_link_pic (info))
4057 addend = rel->r_addend;
4058 }
4059 if (!update_plt_info (abfd, ifunc, got2, addend))
4060 return FALSE;
4061 }
4062 }
4063 }
4064
4065 if (!htab->is_vxworks
4066 && is_branch_reloc (r_type)
4067 && h != NULL
4068 && h == tga)
4069 {
4070 if (rel != relocs
4071 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4072 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4073 /* We have a new-style __tls_get_addr call with a marker
4074 reloc. */
4075 ;
4076 else
4077 /* Mark this section as having an old-style call. */
4078 sec->has_tls_get_addr_call = 1;
4079 }
4080
4081 switch (r_type)
4082 {
4083 case R_PPC_TLSGD:
4084 case R_PPC_TLSLD:
4085 /* These special tls relocs tie a call to __tls_get_addr with
4086 its parameter symbol. */
4087 break;
4088
4089 case R_PPC_GOT_TLSLD16:
4090 case R_PPC_GOT_TLSLD16_LO:
4091 case R_PPC_GOT_TLSLD16_HI:
4092 case R_PPC_GOT_TLSLD16_HA:
4093 tls_type = TLS_TLS | TLS_LD;
4094 goto dogottls;
4095
4096 case R_PPC_GOT_TLSGD16:
4097 case R_PPC_GOT_TLSGD16_LO:
4098 case R_PPC_GOT_TLSGD16_HI:
4099 case R_PPC_GOT_TLSGD16_HA:
4100 tls_type = TLS_TLS | TLS_GD;
4101 goto dogottls;
4102
4103 case R_PPC_GOT_TPREL16:
4104 case R_PPC_GOT_TPREL16_LO:
4105 case R_PPC_GOT_TPREL16_HI:
4106 case R_PPC_GOT_TPREL16_HA:
4107 if (bfd_link_dll (info))
4108 info->flags |= DF_STATIC_TLS;
4109 tls_type = TLS_TLS | TLS_TPREL;
4110 goto dogottls;
4111
4112 case R_PPC_GOT_DTPREL16:
4113 case R_PPC_GOT_DTPREL16_LO:
4114 case R_PPC_GOT_DTPREL16_HI:
4115 case R_PPC_GOT_DTPREL16_HA:
4116 tls_type = TLS_TLS | TLS_DTPREL;
4117 dogottls:
4118 sec->has_tls_reloc = 1;
4119 /* Fall through. */
4120
4121 /* GOT16 relocations */
4122 case R_PPC_GOT16:
4123 case R_PPC_GOT16_LO:
4124 case R_PPC_GOT16_HI:
4125 case R_PPC_GOT16_HA:
4126 /* This symbol requires a global offset table entry. */
4127 if (htab->elf.sgot == NULL)
4128 {
4129 if (htab->elf.dynobj == NULL)
4130 htab->elf.dynobj = abfd;
4131 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4132 return FALSE;
4133 }
4134 if (h != NULL)
4135 {
4136 h->got.refcount += 1;
4137 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4138 }
4139 else
4140 /* This is a global offset table entry for a local symbol. */
4141 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4142 return FALSE;
4143
4144 /* We may also need a plt entry if the symbol turns out to be
4145 an ifunc. */
4146 if (h != NULL && !bfd_link_pic (info))
4147 {
4148 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4149 return FALSE;
4150 }
4151 break;
4152
4153 /* Indirect .sdata relocation. */
4154 case R_PPC_EMB_SDAI16:
4155 if (bfd_link_pic (info))
4156 {
4157 bad_shared_reloc (abfd, r_type);
4158 return FALSE;
4159 }
4160 htab->sdata[0].sym->ref_regular = 1;
4161 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4162 h, rel))
4163 return FALSE;
4164 if (h != NULL)
4165 {
4166 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4167 h->non_got_ref = TRUE;
4168 }
4169 break;
4170
4171 /* Indirect .sdata2 relocation. */
4172 case R_PPC_EMB_SDA2I16:
4173 if (bfd_link_pic (info))
4174 {
4175 bad_shared_reloc (abfd, r_type);
4176 return FALSE;
4177 }
4178 htab->sdata[1].sym->ref_regular = 1;
4179 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4180 h, rel))
4181 return FALSE;
4182 if (h != NULL)
4183 {
4184 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4185 h->non_got_ref = TRUE;
4186 }
4187 break;
4188
4189 case R_PPC_SDAREL16:
4190 htab->sdata[0].sym->ref_regular = 1;
4191 /* Fall through. */
4192
4193 case R_PPC_VLE_SDAREL_LO16A:
4194 case R_PPC_VLE_SDAREL_LO16D:
4195 case R_PPC_VLE_SDAREL_HI16A:
4196 case R_PPC_VLE_SDAREL_HI16D:
4197 case R_PPC_VLE_SDAREL_HA16A:
4198 case R_PPC_VLE_SDAREL_HA16D:
4199 if (h != NULL)
4200 {
4201 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4202 h->non_got_ref = TRUE;
4203 }
4204 break;
4205
4206 case R_PPC_VLE_REL8:
4207 case R_PPC_VLE_REL15:
4208 case R_PPC_VLE_REL24:
4209 case R_PPC_VLE_LO16A:
4210 case R_PPC_VLE_LO16D:
4211 case R_PPC_VLE_HI16A:
4212 case R_PPC_VLE_HI16D:
4213 case R_PPC_VLE_HA16A:
4214 case R_PPC_VLE_HA16D:
4215 case R_PPC_VLE_ADDR20:
4216 break;
4217
4218 case R_PPC_EMB_SDA2REL:
4219 if (bfd_link_pic (info))
4220 {
4221 bad_shared_reloc (abfd, r_type);
4222 return FALSE;
4223 }
4224 htab->sdata[1].sym->ref_regular = 1;
4225 if (h != NULL)
4226 {
4227 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4228 h->non_got_ref = TRUE;
4229 }
4230 break;
4231
4232 case R_PPC_VLE_SDA21_LO:
4233 case R_PPC_VLE_SDA21:
4234 case R_PPC_EMB_SDA21:
4235 case R_PPC_EMB_RELSDA:
4236 if (bfd_link_pic (info))
4237 {
4238 bad_shared_reloc (abfd, r_type);
4239 return FALSE;
4240 }
4241 if (h != NULL)
4242 {
4243 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4244 h->non_got_ref = TRUE;
4245 }
4246 break;
4247
4248 case R_PPC_EMB_NADDR32:
4249 case R_PPC_EMB_NADDR16:
4250 case R_PPC_EMB_NADDR16_LO:
4251 case R_PPC_EMB_NADDR16_HI:
4252 case R_PPC_EMB_NADDR16_HA:
4253 if (bfd_link_pic (info))
4254 {
4255 bad_shared_reloc (abfd, r_type);
4256 return FALSE;
4257 }
4258 if (h != NULL)
4259 h->non_got_ref = TRUE;
4260 break;
4261
4262 case R_PPC_PLTREL24:
4263 if (h == NULL)
4264 break;
4265 /* Fall through */
4266 case R_PPC_PLT32:
4267 case R_PPC_PLTREL32:
4268 case R_PPC_PLT16_LO:
4269 case R_PPC_PLT16_HI:
4270 case R_PPC_PLT16_HA:
4271 #ifdef DEBUG
4272 fprintf (stderr, "Reloc requires a PLT entry\n");
4273 #endif
4274 /* This symbol requires a procedure linkage table entry. */
4275 if (h == NULL)
4276 {
4277 if (ifunc == NULL)
4278 {
4279 /* It does not make sense to have a procedure linkage
4280 table entry for a non-ifunc local symbol. */
4281 info->callbacks->einfo
4282 /* xgettext:c-format */
4283 (_("%H: %s reloc against local symbol\n"),
4284 abfd, sec, rel->r_offset,
4285 ppc_elf_howto_table[r_type]->name);
4286 bfd_set_error (bfd_error_bad_value);
4287 return FALSE;
4288 }
4289 }
4290 else
4291 {
4292 bfd_vma addend = 0;
4293
4294 if (r_type == R_PPC_PLTREL24)
4295 {
4296 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4297 if (bfd_link_pic (info))
4298 addend = rel->r_addend;
4299 }
4300 h->needs_plt = 1;
4301 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4302 return FALSE;
4303 }
4304 break;
4305
4306 /* The following relocations don't need to propagate the
4307 relocation if linking a shared object since they are
4308 section relative. */
4309 case R_PPC_SECTOFF:
4310 case R_PPC_SECTOFF_LO:
4311 case R_PPC_SECTOFF_HI:
4312 case R_PPC_SECTOFF_HA:
4313 case R_PPC_DTPREL16:
4314 case R_PPC_DTPREL16_LO:
4315 case R_PPC_DTPREL16_HI:
4316 case R_PPC_DTPREL16_HA:
4317 case R_PPC_TOC16:
4318 break;
4319
4320 case R_PPC_REL16:
4321 case R_PPC_REL16_LO:
4322 case R_PPC_REL16_HI:
4323 case R_PPC_REL16_HA:
4324 case R_PPC_REL16DX_HA:
4325 ppc_elf_tdata (abfd)->has_rel16 = 1;
4326 break;
4327
4328 /* These are just markers. */
4329 case R_PPC_TLS:
4330 case R_PPC_EMB_MRKREF:
4331 case R_PPC_NONE:
4332 case R_PPC_max:
4333 case R_PPC_RELAX:
4334 case R_PPC_RELAX_PLT:
4335 case R_PPC_RELAX_PLTREL24:
4336 case R_PPC_16DX_HA:
4337 break;
4338
4339 /* These should only appear in dynamic objects. */
4340 case R_PPC_COPY:
4341 case R_PPC_GLOB_DAT:
4342 case R_PPC_JMP_SLOT:
4343 case R_PPC_RELATIVE:
4344 case R_PPC_IRELATIVE:
4345 break;
4346
4347 /* These aren't handled yet. We'll report an error later. */
4348 case R_PPC_ADDR30:
4349 case R_PPC_EMB_RELSEC16:
4350 case R_PPC_EMB_RELST_LO:
4351 case R_PPC_EMB_RELST_HI:
4352 case R_PPC_EMB_RELST_HA:
4353 case R_PPC_EMB_BIT_FLD:
4354 break;
4355
4356 /* This refers only to functions defined in the shared library. */
4357 case R_PPC_LOCAL24PC:
4358 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4359 {
4360 htab->plt_type = PLT_OLD;
4361 htab->old_bfd = abfd;
4362 }
4363 if (h != NULL && h->type == STT_GNU_IFUNC)
4364 {
4365 h->needs_plt = 1;
4366 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4367 return FALSE;
4368 }
4369 break;
4370
4371 /* This relocation describes the C++ object vtable hierarchy.
4372 Reconstruct it for later use during GC. */
4373 case R_PPC_GNU_VTINHERIT:
4374 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4375 return FALSE;
4376 break;
4377
4378 /* This relocation describes which C++ vtable entries are actually
4379 used. Record for later use during GC. */
4380 case R_PPC_GNU_VTENTRY:
4381 BFD_ASSERT (h != NULL);
4382 if (h != NULL
4383 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4384 return FALSE;
4385 break;
4386
4387 /* We shouldn't really be seeing TPREL32. */
4388 case R_PPC_TPREL32:
4389 case R_PPC_TPREL16:
4390 case R_PPC_TPREL16_LO:
4391 case R_PPC_TPREL16_HI:
4392 case R_PPC_TPREL16_HA:
4393 if (bfd_link_dll (info))
4394 info->flags |= DF_STATIC_TLS;
4395 goto dodyn;
4396
4397 /* Nor these. */
4398 case R_PPC_DTPMOD32:
4399 case R_PPC_DTPREL32:
4400 goto dodyn;
4401
4402 case R_PPC_REL32:
4403 if (h == NULL
4404 && got2 != NULL
4405 && (sec->flags & SEC_CODE) != 0
4406 && bfd_link_pic (info)
4407 && htab->plt_type == PLT_UNSET)
4408 {
4409 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4410 the start of a function, which assembles to a REL32
4411 reference to .got2. If we detect one of these, then
4412 force the old PLT layout because the linker cannot
4413 reliably deduce the GOT pointer value needed for
4414 PLT call stubs. */
4415 asection *s;
4416 Elf_Internal_Sym *isym;
4417
4418 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4419 abfd, r_symndx);
4420 if (isym == NULL)
4421 return FALSE;
4422
4423 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4424 if (s == got2)
4425 {
4426 htab->plt_type = PLT_OLD;
4427 htab->old_bfd = abfd;
4428 }
4429 }
4430 if (h == NULL || h == htab->elf.hgot)
4431 break;
4432 /* fall through */
4433
4434 case R_PPC_ADDR32:
4435 case R_PPC_ADDR16:
4436 case R_PPC_ADDR16_LO:
4437 case R_PPC_ADDR16_HI:
4438 case R_PPC_ADDR16_HA:
4439 case R_PPC_UADDR32:
4440 case R_PPC_UADDR16:
4441 if (h != NULL && !bfd_link_pic (info))
4442 {
4443 /* We may need a plt entry if the symbol turns out to be
4444 a function defined in a dynamic object. */
4445 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4446 return FALSE;
4447
4448 /* We may need a copy reloc too. */
4449 h->non_got_ref = 1;
4450 h->pointer_equality_needed = 1;
4451 if (r_type == R_PPC_ADDR16_HA)
4452 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4453 if (r_type == R_PPC_ADDR16_LO)
4454 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4455 }
4456 goto dodyn;
4457
4458 case R_PPC_REL24:
4459 case R_PPC_REL14:
4460 case R_PPC_REL14_BRTAKEN:
4461 case R_PPC_REL14_BRNTAKEN:
4462 if (h == NULL)
4463 break;
4464 if (h == htab->elf.hgot)
4465 {
4466 if (htab->plt_type == PLT_UNSET)
4467 {
4468 htab->plt_type = PLT_OLD;
4469 htab->old_bfd = abfd;
4470 }
4471 break;
4472 }
4473 /* fall through */
4474
4475 case R_PPC_ADDR24:
4476 case R_PPC_ADDR14:
4477 case R_PPC_ADDR14_BRTAKEN:
4478 case R_PPC_ADDR14_BRNTAKEN:
4479 if (h != NULL && !bfd_link_pic (info))
4480 {
4481 /* We may need a plt entry if the symbol turns out to be
4482 a function defined in a dynamic object. */
4483 h->needs_plt = 1;
4484 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4485 return FALSE;
4486 break;
4487 }
4488
4489 dodyn:
4490 /* If we are creating a shared library, and this is a reloc
4491 against a global symbol, or a non PC relative reloc
4492 against a local symbol, then we need to copy the reloc
4493 into the shared library. However, if we are linking with
4494 -Bsymbolic, we do not need to copy a reloc against a
4495 global symbol which is defined in an object we are
4496 including in the link (i.e., DEF_REGULAR is set). At
4497 this point we have not seen all the input files, so it is
4498 possible that DEF_REGULAR is not set now but will be set
4499 later (it is never cleared). In case of a weak definition,
4500 DEF_REGULAR may be cleared later by a strong definition in
4501 a shared library. We account for that possibility below by
4502 storing information in the dyn_relocs field of the hash
4503 table entry. A similar situation occurs when creating
4504 shared libraries and symbol visibility changes render the
4505 symbol local.
4506
4507 If on the other hand, we are creating an executable, we
4508 may need to keep relocations for symbols satisfied by a
4509 dynamic library if we manage to avoid copy relocs for the
4510 symbol. */
4511 if ((bfd_link_pic (info)
4512 && (must_be_dyn_reloc (info, r_type)
4513 || (h != NULL
4514 && (!SYMBOLIC_BIND (info, h)
4515 || h->root.type == bfd_link_hash_defweak
4516 || !h->def_regular))))
4517 || (ELIMINATE_COPY_RELOCS
4518 && !bfd_link_pic (info)
4519 && h != NULL
4520 && (h->root.type == bfd_link_hash_defweak
4521 || !h->def_regular)))
4522 {
4523 #ifdef DEBUG
4524 fprintf (stderr,
4525 "ppc_elf_check_relocs needs to "
4526 "create relocation for %s\n",
4527 (h && h->root.root.string
4528 ? h->root.root.string : "<unknown>"));
4529 #endif
4530 if (sreloc == NULL)
4531 {
4532 if (htab->elf.dynobj == NULL)
4533 htab->elf.dynobj = abfd;
4534
4535 sreloc = _bfd_elf_make_dynamic_reloc_section
4536 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4537
4538 if (sreloc == NULL)
4539 return FALSE;
4540 }
4541
4542 /* If this is a global symbol, we count the number of
4543 relocations we need for this symbol. */
4544 if (h != NULL)
4545 {
4546 struct elf_dyn_relocs *p;
4547 struct elf_dyn_relocs **rel_head;
4548
4549 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4550 p = *rel_head;
4551 if (p == NULL || p->sec != sec)
4552 {
4553 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4554 if (p == NULL)
4555 return FALSE;
4556 p->next = *rel_head;
4557 *rel_head = p;
4558 p->sec = sec;
4559 p->count = 0;
4560 p->pc_count = 0;
4561 }
4562 p->count += 1;
4563 if (!must_be_dyn_reloc (info, r_type))
4564 p->pc_count += 1;
4565 }
4566 else
4567 {
4568 /* Track dynamic relocs needed for local syms too.
4569 We really need local syms available to do this
4570 easily. Oh well. */
4571 struct ppc_dyn_relocs *p;
4572 struct ppc_dyn_relocs **rel_head;
4573 bfd_boolean is_ifunc;
4574 asection *s;
4575 void *vpp;
4576 Elf_Internal_Sym *isym;
4577
4578 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4579 abfd, r_symndx);
4580 if (isym == NULL)
4581 return FALSE;
4582
4583 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4584 if (s == NULL)
4585 s = sec;
4586
4587 vpp = &elf_section_data (s)->local_dynrel;
4588 rel_head = (struct ppc_dyn_relocs **) vpp;
4589 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4590 p = *rel_head;
4591 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4592 p = p->next;
4593 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4594 {
4595 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4596 if (p == NULL)
4597 return FALSE;
4598 p->next = *rel_head;
4599 *rel_head = p;
4600 p->sec = sec;
4601 p->ifunc = is_ifunc;
4602 p->count = 0;
4603 }
4604 p->count += 1;
4605 }
4606 }
4607
4608 break;
4609 }
4610 }
4611
4612 return TRUE;
4613 }
4614 \f
4615 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4616 and OBFD, and merge non-conflicting ones. */
4617 void
4618 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4619 {
4620 bfd *obfd = info->output_bfd;
4621 obj_attribute *in_attr, *in_attrs;
4622 obj_attribute *out_attr, *out_attrs;
4623
4624 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4625 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4626
4627 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4628 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4629
4630 if (in_attr->i != out_attr->i)
4631 {
4632 int in_fp = in_attr->i & 3;
4633 int out_fp = out_attr->i & 3;
4634
4635 if (in_fp == 0)
4636 ;
4637 else if (out_fp == 0)
4638 {
4639 out_attr->type = 1;
4640 out_attr->i ^= in_fp;
4641 }
4642 else if (out_fp != 2 && in_fp == 2)
4643 _bfd_error_handler
4644 /* xgettext:c-format */
4645 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4646 else if (out_fp == 2 && in_fp != 2)
4647 _bfd_error_handler
4648 /* xgettext:c-format */
4649 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4650 else if (out_fp == 1 && in_fp == 3)
4651 _bfd_error_handler
4652 /* xgettext:c-format */
4653 (_("Warning: %B uses double-precision hard float, "
4654 "%B uses single-precision hard float"), obfd, ibfd);
4655 else if (out_fp == 3 && in_fp == 1)
4656 _bfd_error_handler
4657 /* xgettext:c-format */
4658 (_("Warning: %B uses double-precision hard float, "
4659 "%B uses single-precision hard float"), ibfd, obfd);
4660
4661 in_fp = in_attr->i & 0xc;
4662 out_fp = out_attr->i & 0xc;
4663 if (in_fp == 0)
4664 ;
4665 else if (out_fp == 0)
4666 {
4667 out_attr->type = 1;
4668 out_attr->i ^= in_fp;
4669 }
4670 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4671 _bfd_error_handler
4672 /* xgettext:c-format */
4673 (_("Warning: %B uses 64-bit long double, "
4674 "%B uses 128-bit long double"), ibfd, obfd);
4675 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4676 _bfd_error_handler
4677 /* xgettext:c-format */
4678 (_("Warning: %B uses 64-bit long double, "
4679 "%B uses 128-bit long double"), obfd, ibfd);
4680 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4681 _bfd_error_handler
4682 /* xgettext:c-format */
4683 (_("Warning: %B uses IBM long double, "
4684 "%B uses IEEE long double"), ibfd, obfd);
4685 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4686 _bfd_error_handler
4687 /* xgettext:c-format */
4688 (_("Warning: %B uses IBM long double, "
4689 "%B uses IEEE long double"), obfd, ibfd);
4690 }
4691 }
4692
4693 /* Merge object attributes from IBFD into OBFD. Warn if
4694 there are conflicting attributes. */
4695 static bfd_boolean
4696 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4697 {
4698 bfd *obfd;
4699 obj_attribute *in_attr, *in_attrs;
4700 obj_attribute *out_attr, *out_attrs;
4701
4702 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4703
4704 obfd = info->output_bfd;
4705 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4706 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4707
4708 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4709 merge non-conflicting ones. */
4710 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4711 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4712 if (in_attr->i != out_attr->i)
4713 {
4714 int in_vec = in_attr->i & 3;
4715 int out_vec = out_attr->i & 3;
4716
4717 if (in_vec == 0)
4718 ;
4719 else if (out_vec == 0)
4720 {
4721 out_attr->type = 1;
4722 out_attr->i = in_vec;
4723 }
4724 /* For now, allow generic to transition to AltiVec or SPE
4725 without a warning. If GCC marked files with their stack
4726 alignment and used don't-care markings for files which are
4727 not affected by the vector ABI, we could warn about this
4728 case too. */
4729 else if (in_vec == 1)
4730 ;
4731 else if (out_vec == 1)
4732 {
4733 out_attr->type = 1;
4734 out_attr->i = in_vec;
4735 }
4736 else if (out_vec < in_vec)
4737 _bfd_error_handler
4738 /* xgettext:c-format */
4739 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4740 obfd, ibfd);
4741 else if (out_vec > in_vec)
4742 _bfd_error_handler
4743 /* xgettext:c-format */
4744 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4745 ibfd, obfd);
4746 }
4747
4748 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4749 and merge non-conflicting ones. */
4750 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4751 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4752 if (in_attr->i != out_attr->i)
4753 {
4754 int in_struct = in_attr->i & 3;
4755 int out_struct = out_attr->i & 3;
4756
4757 if (in_struct == 0 || in_struct == 3)
4758 ;
4759 else if (out_struct == 0)
4760 {
4761 out_attr->type = 1;
4762 out_attr->i = in_struct;
4763 }
4764 else if (out_struct < in_struct)
4765 _bfd_error_handler
4766 /* xgettext:c-format */
4767 (_("Warning: %B uses r3/r4 for small structure returns, "
4768 "%B uses memory"), obfd, ibfd);
4769 else if (out_struct > in_struct)
4770 _bfd_error_handler
4771 /* xgettext:c-format */
4772 (_("Warning: %B uses r3/r4 for small structure returns, "
4773 "%B uses memory"), ibfd, obfd);
4774 }
4775
4776 /* Merge Tag_compatibility attributes and any common GNU ones. */
4777 _bfd_elf_merge_object_attributes (ibfd, info);
4778
4779 return TRUE;
4780 }
4781
4782 /* Merge backend specific data from an object file to the output
4783 object file when linking. */
4784
4785 static bfd_boolean
4786 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4787 {
4788 bfd *obfd = info->output_bfd;
4789 flagword old_flags;
4790 flagword new_flags;
4791 bfd_boolean error;
4792
4793 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4794 return TRUE;
4795
4796 /* Check if we have the same endianness. */
4797 if (! _bfd_generic_verify_endian_match (ibfd, info))
4798 return FALSE;
4799
4800 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4801 return FALSE;
4802
4803 new_flags = elf_elfheader (ibfd)->e_flags;
4804 old_flags = elf_elfheader (obfd)->e_flags;
4805 if (!elf_flags_init (obfd))
4806 {
4807 /* First call, no flags set. */
4808 elf_flags_init (obfd) = TRUE;
4809 elf_elfheader (obfd)->e_flags = new_flags;
4810 }
4811
4812 /* Compatible flags are ok. */
4813 else if (new_flags == old_flags)
4814 ;
4815
4816 /* Incompatible flags. */
4817 else
4818 {
4819 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4820 to be linked with either. */
4821 error = FALSE;
4822 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4823 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4824 {
4825 error = TRUE;
4826 _bfd_error_handler
4827 (_("%B: compiled with -mrelocatable and linked with "
4828 "modules compiled normally"), ibfd);
4829 }
4830 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4831 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4832 {
4833 error = TRUE;
4834 _bfd_error_handler
4835 (_("%B: compiled normally and linked with "
4836 "modules compiled with -mrelocatable"), ibfd);
4837 }
4838
4839 /* The output is -mrelocatable-lib iff both the input files are. */
4840 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4841 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4842
4843 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4844 but each input file is either -mrelocatable or -mrelocatable-lib. */
4845 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4846 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4847 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4848 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4849
4850 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4851 any module uses it. */
4852 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4853
4854 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4855 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4856
4857 /* Warn about any other mismatches. */
4858 if (new_flags != old_flags)
4859 {
4860 error = TRUE;
4861 _bfd_error_handler
4862 /* xgettext:c-format */
4863 (_("%B: uses different e_flags (%#x) fields "
4864 "than previous modules (%#x)"),
4865 ibfd, new_flags, old_flags);
4866 }
4867
4868 if (error)
4869 {
4870 bfd_set_error (bfd_error_bad_value);
4871 return FALSE;
4872 }
4873 }
4874
4875 return TRUE;
4876 }
4877
4878 static void
4879 ppc_elf_vle_split16 (bfd *input_bfd,
4880 asection *input_section,
4881 unsigned long offset,
4882 bfd_byte *loc,
4883 bfd_vma value,
4884 split16_format_type split16_format,
4885 bfd_boolean fixup)
4886 {
4887 unsigned int insn, opcode, top5;
4888
4889 insn = bfd_get_32 (input_bfd, loc);
4890 opcode = insn & 0xfc00f800;
4891 if (opcode == E_OR2I_INSN
4892 || opcode == E_AND2I_DOT_INSN
4893 || opcode == E_OR2IS_INSN
4894 || opcode == E_LIS_INSN
4895 || opcode == E_AND2IS_DOT_INSN)
4896 {
4897 if (split16_format != split16a_type)
4898 {
4899 if (fixup)
4900 split16_format = split16a_type;
4901 else
4902 _bfd_error_handler
4903 /* xgettext:c-format */
4904 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4905 input_bfd, input_section, offset, opcode);
4906 }
4907 }
4908 else if (opcode == E_ADD2I_DOT_INSN
4909 || opcode == E_ADD2IS_INSN
4910 || opcode == E_CMP16I_INSN
4911 || opcode == E_MULL2I_INSN
4912 || opcode == E_CMPL16I_INSN
4913 || opcode == E_CMPH16I_INSN
4914 || opcode == E_CMPHL16I_INSN)
4915 {
4916 if (split16_format != split16d_type)
4917 {
4918 if (fixup)
4919 split16_format = split16d_type;
4920 else
4921 _bfd_error_handler
4922 /* xgettext:c-format */
4923 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4924 input_bfd, input_section, offset, opcode);
4925 }
4926 }
4927 top5 = value & 0xf800;
4928 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4929 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4930 insn |= top5;
4931 insn |= value & 0x7ff;
4932 bfd_put_32 (input_bfd, insn, loc);
4933 }
4934
4935 static void
4936 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4937 {
4938 unsigned int insn;
4939
4940 insn = bfd_get_32 (output_bfd, loc);
4941 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4942 /* Top 4 bits of value to 17..20. */
4943 insn |= (value & 0xf0000) >> 5;
4944 /* Next 5 bits of the value to 11..15. */
4945 insn |= (value & 0xf800) << 5;
4946 /* And the final 11 bits of the value to bits 21 to 31. */
4947 insn |= value & 0x7ff;
4948 bfd_put_32 (output_bfd, insn, loc);
4949 }
4950
4951 \f
4952 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4953 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4954 int
4955 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4956 struct bfd_link_info *info)
4957 {
4958 struct ppc_elf_link_hash_table *htab;
4959 flagword flags;
4960
4961 htab = ppc_elf_hash_table (info);
4962
4963 if (htab->plt_type == PLT_UNSET)
4964 {
4965 struct elf_link_hash_entry *h;
4966
4967 if (htab->params->plt_style == PLT_OLD)
4968 htab->plt_type = PLT_OLD;
4969 else if (bfd_link_pic (info)
4970 && htab->elf.dynamic_sections_created
4971 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4972 FALSE, FALSE, TRUE)) != NULL
4973 && (h->type == STT_FUNC
4974 || h->needs_plt)
4975 && h->ref_regular
4976 && !(SYMBOL_CALLS_LOCAL (info, h)
4977 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4978 {
4979 /* Profiling of shared libs (and pies) is not supported with
4980 secure plt, because ppc32 does profiling before a
4981 function prologue and a secure plt pic call stubs needs
4982 r30 to be set up. */
4983 htab->plt_type = PLT_OLD;
4984 }
4985 else
4986 {
4987 bfd *ibfd;
4988 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4989
4990 /* Look through the reloc flags left by ppc_elf_check_relocs.
4991 Use the old style bss plt if a file makes plt calls
4992 without using the new relocs, and if ld isn't given
4993 --secure-plt and we never see REL16 relocs. */
4994 if (plt_type == PLT_UNSET)
4995 plt_type = PLT_OLD;
4996 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4997 if (is_ppc_elf (ibfd))
4998 {
4999 if (ppc_elf_tdata (ibfd)->has_rel16)
5000 plt_type = PLT_NEW;
5001 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5002 {
5003 plt_type = PLT_OLD;
5004 htab->old_bfd = ibfd;
5005 break;
5006 }
5007 }
5008 htab->plt_type = plt_type;
5009 }
5010 }
5011 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5012 {
5013 if (htab->old_bfd != NULL)
5014 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5015 htab->old_bfd);
5016 else
5017 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5018 }
5019
5020 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5021
5022 if (htab->plt_type == PLT_NEW)
5023 {
5024 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5025 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5026
5027 /* The new PLT is a loaded section. */
5028 if (htab->elf.splt != NULL
5029 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5030 return -1;
5031
5032 /* The new GOT is not executable. */
5033 if (htab->elf.sgot != NULL
5034 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5035 return -1;
5036 }
5037 else
5038 {
5039 /* Stop an unused .glink section from affecting .text alignment. */
5040 if (htab->glink != NULL
5041 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5042 return -1;
5043 }
5044 return htab->plt_type == PLT_NEW;
5045 }
5046 \f
5047 /* Return the section that should be marked against GC for a given
5048 relocation. */
5049
5050 static asection *
5051 ppc_elf_gc_mark_hook (asection *sec,
5052 struct bfd_link_info *info,
5053 Elf_Internal_Rela *rel,
5054 struct elf_link_hash_entry *h,
5055 Elf_Internal_Sym *sym)
5056 {
5057 if (h != NULL)
5058 switch (ELF32_R_TYPE (rel->r_info))
5059 {
5060 case R_PPC_GNU_VTINHERIT:
5061 case R_PPC_GNU_VTENTRY:
5062 return NULL;
5063 }
5064
5065 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5066 }
5067
5068 /* Update the got, plt and dynamic reloc reference counts for the
5069 section being removed. */
5070
5071 static bfd_boolean
5072 ppc_elf_gc_sweep_hook (bfd *abfd,
5073 struct bfd_link_info *info,
5074 asection *sec,
5075 const Elf_Internal_Rela *relocs)
5076 {
5077 struct ppc_elf_link_hash_table *htab;
5078 Elf_Internal_Shdr *symtab_hdr;
5079 struct elf_link_hash_entry **sym_hashes;
5080 bfd_signed_vma *local_got_refcounts;
5081 const Elf_Internal_Rela *rel, *relend;
5082 asection *got2;
5083
5084 if (bfd_link_relocatable (info))
5085 return TRUE;
5086
5087 if ((sec->flags & SEC_ALLOC) == 0)
5088 return TRUE;
5089
5090 elf_section_data (sec)->local_dynrel = NULL;
5091
5092 htab = ppc_elf_hash_table (info);
5093 symtab_hdr = &elf_symtab_hdr (abfd);
5094 sym_hashes = elf_sym_hashes (abfd);
5095 local_got_refcounts = elf_local_got_refcounts (abfd);
5096 got2 = bfd_get_section_by_name (abfd, ".got2");
5097
5098 relend = relocs + sec->reloc_count;
5099 for (rel = relocs; rel < relend; rel++)
5100 {
5101 unsigned long r_symndx;
5102 enum elf_ppc_reloc_type r_type;
5103 struct elf_link_hash_entry *h = NULL;
5104
5105 r_symndx = ELF32_R_SYM (rel->r_info);
5106 if (r_symndx >= symtab_hdr->sh_info)
5107 {
5108 struct elf_dyn_relocs **pp, *p;
5109 struct ppc_elf_link_hash_entry *eh;
5110
5111 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5112 while (h->root.type == bfd_link_hash_indirect
5113 || h->root.type == bfd_link_hash_warning)
5114 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5115 eh = (struct ppc_elf_link_hash_entry *) h;
5116
5117 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5118 if (p->sec == sec)
5119 {
5120 /* Everything must go for SEC. */
5121 *pp = p->next;
5122 break;
5123 }
5124 }
5125
5126 r_type = ELF32_R_TYPE (rel->r_info);
5127 if (!htab->is_vxworks
5128 && h == NULL
5129 && local_got_refcounts != NULL
5130 && (!bfd_link_pic (info)
5131 || is_branch_reloc (r_type)))
5132 {
5133 struct plt_entry **local_plt = (struct plt_entry **)
5134 (local_got_refcounts + symtab_hdr->sh_info);
5135 char *local_got_tls_masks = (char *)
5136 (local_plt + symtab_hdr->sh_info);
5137 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5138 {
5139 struct plt_entry **ifunc = local_plt + r_symndx;
5140 bfd_vma addend = 0;
5141 struct plt_entry *ent;
5142
5143 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5144 addend = rel->r_addend;
5145 ent = find_plt_ent (ifunc, got2, addend);
5146 if (ent->plt.refcount > 0)
5147 ent->plt.refcount -= 1;
5148 continue;
5149 }
5150 }
5151
5152 switch (r_type)
5153 {
5154 case R_PPC_GOT_TLSLD16:
5155 case R_PPC_GOT_TLSLD16_LO:
5156 case R_PPC_GOT_TLSLD16_HI:
5157 case R_PPC_GOT_TLSLD16_HA:
5158 case R_PPC_GOT_TLSGD16:
5159 case R_PPC_GOT_TLSGD16_LO:
5160 case R_PPC_GOT_TLSGD16_HI:
5161 case R_PPC_GOT_TLSGD16_HA:
5162 case R_PPC_GOT_TPREL16:
5163 case R_PPC_GOT_TPREL16_LO:
5164 case R_PPC_GOT_TPREL16_HI:
5165 case R_PPC_GOT_TPREL16_HA:
5166 case R_PPC_GOT_DTPREL16:
5167 case R_PPC_GOT_DTPREL16_LO:
5168 case R_PPC_GOT_DTPREL16_HI:
5169 case R_PPC_GOT_DTPREL16_HA:
5170 case R_PPC_GOT16:
5171 case R_PPC_GOT16_LO:
5172 case R_PPC_GOT16_HI:
5173 case R_PPC_GOT16_HA:
5174 if (h != NULL)
5175 {
5176 if (h->got.refcount > 0)
5177 h->got.refcount--;
5178 if (!bfd_link_pic (info))
5179 {
5180 struct plt_entry *ent;
5181
5182 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5183 if (ent != NULL && ent->plt.refcount > 0)
5184 ent->plt.refcount -= 1;
5185 }
5186 }
5187 else if (local_got_refcounts != NULL)
5188 {
5189 if (local_got_refcounts[r_symndx] > 0)
5190 local_got_refcounts[r_symndx]--;
5191 }
5192 break;
5193
5194 case R_PPC_REL24:
5195 case R_PPC_REL14:
5196 case R_PPC_REL14_BRTAKEN:
5197 case R_PPC_REL14_BRNTAKEN:
5198 case R_PPC_REL32:
5199 if (h == NULL || h == htab->elf.hgot)
5200 break;
5201 /* Fall through. */
5202
5203 case R_PPC_ADDR32:
5204 case R_PPC_ADDR24:
5205 case R_PPC_ADDR16:
5206 case R_PPC_ADDR16_LO:
5207 case R_PPC_ADDR16_HI:
5208 case R_PPC_ADDR16_HA:
5209 case R_PPC_ADDR14:
5210 case R_PPC_ADDR14_BRTAKEN:
5211 case R_PPC_ADDR14_BRNTAKEN:
5212 case R_PPC_UADDR32:
5213 case R_PPC_UADDR16:
5214 if (bfd_link_pic (info))
5215 break;
5216 /* Fall through. */
5217
5218 case R_PPC_PLT32:
5219 case R_PPC_PLTREL24:
5220 case R_PPC_PLTREL32:
5221 case R_PPC_PLT16_LO:
5222 case R_PPC_PLT16_HI:
5223 case R_PPC_PLT16_HA:
5224 if (h != NULL)
5225 {
5226 bfd_vma addend = 0;
5227 struct plt_entry *ent;
5228
5229 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5230 addend = rel->r_addend;
5231 ent = find_plt_ent (&h->plt.plist, got2, addend);
5232 if (ent != NULL && ent->plt.refcount > 0)
5233 ent->plt.refcount -= 1;
5234 }
5235 break;
5236
5237 default:
5238 break;
5239 }
5240 }
5241 return TRUE;
5242 }
5243 \f
5244 /* Set plt output section type, htab->tls_get_addr, and call the
5245 generic ELF tls_setup function. */
5246
5247 asection *
5248 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5249 {
5250 struct ppc_elf_link_hash_table *htab;
5251
5252 htab = ppc_elf_hash_table (info);
5253 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5254 FALSE, FALSE, TRUE);
5255 if (htab->plt_type != PLT_NEW)
5256 htab->params->no_tls_get_addr_opt = TRUE;
5257
5258 if (!htab->params->no_tls_get_addr_opt)
5259 {
5260 struct elf_link_hash_entry *opt, *tga;
5261 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5262 FALSE, FALSE, TRUE);
5263 if (opt != NULL
5264 && (opt->root.type == bfd_link_hash_defined
5265 || opt->root.type == bfd_link_hash_defweak))
5266 {
5267 /* If glibc supports an optimized __tls_get_addr call stub,
5268 signalled by the presence of __tls_get_addr_opt, and we'll
5269 be calling __tls_get_addr via a plt call stub, then
5270 make __tls_get_addr point to __tls_get_addr_opt. */
5271 tga = htab->tls_get_addr;
5272 if (htab->elf.dynamic_sections_created
5273 && tga != NULL
5274 && (tga->type == STT_FUNC
5275 || tga->needs_plt)
5276 && !(SYMBOL_CALLS_LOCAL (info, tga)
5277 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5278 {
5279 struct plt_entry *ent;
5280 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5281 if (ent->plt.refcount > 0)
5282 break;
5283 if (ent != NULL)
5284 {
5285 tga->root.type = bfd_link_hash_indirect;
5286 tga->root.u.i.link = &opt->root;
5287 ppc_elf_copy_indirect_symbol (info, opt, tga);
5288 opt->mark = 1;
5289 if (opt->dynindx != -1)
5290 {
5291 /* Use __tls_get_addr_opt in dynamic relocations. */
5292 opt->dynindx = -1;
5293 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5294 opt->dynstr_index);
5295 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5296 return FALSE;
5297 }
5298 htab->tls_get_addr = opt;
5299 }
5300 }
5301 }
5302 else
5303 htab->params->no_tls_get_addr_opt = TRUE;
5304 }
5305 if (htab->plt_type == PLT_NEW
5306 && htab->elf.splt != NULL
5307 && htab->elf.splt->output_section != NULL)
5308 {
5309 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5310 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5311 }
5312
5313 return _bfd_elf_tls_setup (obfd, info);
5314 }
5315
5316 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5317 HASH. */
5318
5319 static bfd_boolean
5320 branch_reloc_hash_match (const bfd *ibfd,
5321 const Elf_Internal_Rela *rel,
5322 const struct elf_link_hash_entry *hash)
5323 {
5324 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5325 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5326 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5327
5328 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5329 {
5330 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5331 struct elf_link_hash_entry *h;
5332
5333 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5334 while (h->root.type == bfd_link_hash_indirect
5335 || h->root.type == bfd_link_hash_warning)
5336 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5337 if (h == hash)
5338 return TRUE;
5339 }
5340 return FALSE;
5341 }
5342
5343 /* Run through all the TLS relocs looking for optimization
5344 opportunities. */
5345
5346 bfd_boolean
5347 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5348 struct bfd_link_info *info)
5349 {
5350 bfd *ibfd;
5351 asection *sec;
5352 struct ppc_elf_link_hash_table *htab;
5353 int pass;
5354
5355 if (!bfd_link_executable (info))
5356 return TRUE;
5357
5358 htab = ppc_elf_hash_table (info);
5359 if (htab == NULL)
5360 return FALSE;
5361
5362 /* Make two passes through the relocs. First time check that tls
5363 relocs involved in setting up a tls_get_addr call are indeed
5364 followed by such a call. If they are not, don't do any tls
5365 optimization. On the second pass twiddle tls_mask flags to
5366 notify relocate_section that optimization can be done, and
5367 adjust got and plt refcounts. */
5368 for (pass = 0; pass < 2; ++pass)
5369 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5370 {
5371 Elf_Internal_Sym *locsyms = NULL;
5372 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5373 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5374
5375 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5376 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5377 {
5378 Elf_Internal_Rela *relstart, *rel, *relend;
5379 int expecting_tls_get_addr = 0;
5380
5381 /* Read the relocations. */
5382 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5383 info->keep_memory);
5384 if (relstart == NULL)
5385 return FALSE;
5386
5387 relend = relstart + sec->reloc_count;
5388 for (rel = relstart; rel < relend; rel++)
5389 {
5390 enum elf_ppc_reloc_type r_type;
5391 unsigned long r_symndx;
5392 struct elf_link_hash_entry *h = NULL;
5393 char *tls_mask;
5394 char tls_set, tls_clear;
5395 bfd_boolean is_local;
5396 bfd_signed_vma *got_count;
5397
5398 r_symndx = ELF32_R_SYM (rel->r_info);
5399 if (r_symndx >= symtab_hdr->sh_info)
5400 {
5401 struct elf_link_hash_entry **sym_hashes;
5402
5403 sym_hashes = elf_sym_hashes (ibfd);
5404 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5405 while (h->root.type == bfd_link_hash_indirect
5406 || h->root.type == bfd_link_hash_warning)
5407 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5408 }
5409
5410 is_local = FALSE;
5411 if (h == NULL
5412 || !h->def_dynamic)
5413 is_local = TRUE;
5414
5415 r_type = ELF32_R_TYPE (rel->r_info);
5416 /* If this section has old-style __tls_get_addr calls
5417 without marker relocs, then check that each
5418 __tls_get_addr call reloc is preceded by a reloc
5419 that conceivably belongs to the __tls_get_addr arg
5420 setup insn. If we don't find matching arg setup
5421 relocs, don't do any tls optimization. */
5422 if (pass == 0
5423 && sec->has_tls_get_addr_call
5424 && h != NULL
5425 && h == htab->tls_get_addr
5426 && !expecting_tls_get_addr
5427 && is_branch_reloc (r_type))
5428 {
5429 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5430 "TLS optimization disabled\n",
5431 ibfd, sec, rel->r_offset);
5432 if (elf_section_data (sec)->relocs != relstart)
5433 free (relstart);
5434 return TRUE;
5435 }
5436
5437 expecting_tls_get_addr = 0;
5438 switch (r_type)
5439 {
5440 case R_PPC_GOT_TLSLD16:
5441 case R_PPC_GOT_TLSLD16_LO:
5442 expecting_tls_get_addr = 1;
5443 /* Fall through. */
5444
5445 case R_PPC_GOT_TLSLD16_HI:
5446 case R_PPC_GOT_TLSLD16_HA:
5447 /* These relocs should never be against a symbol
5448 defined in a shared lib. Leave them alone if
5449 that turns out to be the case. */
5450 if (!is_local)
5451 continue;
5452
5453 /* LD -> LE */
5454 tls_set = 0;
5455 tls_clear = TLS_LD;
5456 break;
5457
5458 case R_PPC_GOT_TLSGD16:
5459 case R_PPC_GOT_TLSGD16_LO:
5460 expecting_tls_get_addr = 1;
5461 /* Fall through. */
5462
5463 case R_PPC_GOT_TLSGD16_HI:
5464 case R_PPC_GOT_TLSGD16_HA:
5465 if (is_local)
5466 /* GD -> LE */
5467 tls_set = 0;
5468 else
5469 /* GD -> IE */
5470 tls_set = TLS_TLS | TLS_TPRELGD;
5471 tls_clear = TLS_GD;
5472 break;
5473
5474 case R_PPC_GOT_TPREL16:
5475 case R_PPC_GOT_TPREL16_LO:
5476 case R_PPC_GOT_TPREL16_HI:
5477 case R_PPC_GOT_TPREL16_HA:
5478 if (is_local)
5479 {
5480 /* IE -> LE */
5481 tls_set = 0;
5482 tls_clear = TLS_TPREL;
5483 break;
5484 }
5485 else
5486 continue;
5487
5488 case R_PPC_TLSGD:
5489 case R_PPC_TLSLD:
5490 expecting_tls_get_addr = 2;
5491 tls_set = 0;
5492 tls_clear = 0;
5493 break;
5494
5495 default:
5496 continue;
5497 }
5498
5499 if (pass == 0)
5500 {
5501 if (!expecting_tls_get_addr
5502 || (expecting_tls_get_addr == 1
5503 && !sec->has_tls_get_addr_call))
5504 continue;
5505
5506 if (rel + 1 < relend
5507 && branch_reloc_hash_match (ibfd, rel + 1,
5508 htab->tls_get_addr))
5509 continue;
5510
5511 /* Uh oh, we didn't find the expected call. We
5512 could just mark this symbol to exclude it
5513 from tls optimization but it's safer to skip
5514 the entire optimization. */
5515 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5516 "TLS optimization disabled\n"),
5517 ibfd, sec, rel->r_offset);
5518 if (elf_section_data (sec)->relocs != relstart)
5519 free (relstart);
5520 return TRUE;
5521 }
5522
5523 if (expecting_tls_get_addr)
5524 {
5525 struct plt_entry *ent;
5526 bfd_vma addend = 0;
5527
5528 if (bfd_link_pic (info)
5529 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5530 addend = rel[1].r_addend;
5531 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5532 got2, addend);
5533 if (ent != NULL && ent->plt.refcount > 0)
5534 ent->plt.refcount -= 1;
5535
5536 if (expecting_tls_get_addr == 2)
5537 continue;
5538 }
5539
5540 if (h != NULL)
5541 {
5542 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5543 got_count = &h->got.refcount;
5544 }
5545 else
5546 {
5547 bfd_signed_vma *lgot_refs;
5548 struct plt_entry **local_plt;
5549 char *lgot_masks;
5550
5551 if (locsyms == NULL)
5552 {
5553 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5554 if (locsyms == NULL)
5555 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5556 symtab_hdr->sh_info,
5557 0, NULL, NULL, NULL);
5558 if (locsyms == NULL)
5559 {
5560 if (elf_section_data (sec)->relocs != relstart)
5561 free (relstart);
5562 return FALSE;
5563 }
5564 }
5565 lgot_refs = elf_local_got_refcounts (ibfd);
5566 if (lgot_refs == NULL)
5567 abort ();
5568 local_plt = (struct plt_entry **)
5569 (lgot_refs + symtab_hdr->sh_info);
5570 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5571 tls_mask = &lgot_masks[r_symndx];
5572 got_count = &lgot_refs[r_symndx];
5573 }
5574
5575 if (tls_set == 0)
5576 {
5577 /* We managed to get rid of a got entry. */
5578 if (*got_count > 0)
5579 *got_count -= 1;
5580 }
5581
5582 *tls_mask |= tls_set;
5583 *tls_mask &= ~tls_clear;
5584 }
5585
5586 if (elf_section_data (sec)->relocs != relstart)
5587 free (relstart);
5588 }
5589
5590 if (locsyms != NULL
5591 && (symtab_hdr->contents != (unsigned char *) locsyms))
5592 {
5593 if (!info->keep_memory)
5594 free (locsyms);
5595 else
5596 symtab_hdr->contents = (unsigned char *) locsyms;
5597 }
5598 }
5599 htab->do_tls_opt = 1;
5600 return TRUE;
5601 }
5602 \f
5603 /* Return true if we have dynamic relocs that apply to read-only sections. */
5604
5605 static bfd_boolean
5606 readonly_dynrelocs (struct elf_link_hash_entry *h,
5607 struct bfd_link_info *info)
5608 {
5609 struct elf_dyn_relocs *p;
5610
5611 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5612 {
5613 asection *s = p->sec->output_section;
5614
5615 if (s != NULL
5616 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5617 == (SEC_READONLY | SEC_ALLOC)))
5618 {
5619 if (info)
5620 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
5621 p->sec->owner, p->sec);
5622
5623 return TRUE;
5624 }
5625 }
5626 return FALSE;
5627 }
5628
5629 /* Adjust a symbol defined by a dynamic object and referenced by a
5630 regular object. The current definition is in some section of the
5631 dynamic object, but we're not including those sections. We have to
5632 change the definition to something the rest of the link can
5633 understand. */
5634
5635 static bfd_boolean
5636 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5637 struct elf_link_hash_entry *h)
5638 {
5639 struct ppc_elf_link_hash_table *htab;
5640 asection *s;
5641
5642 #ifdef DEBUG
5643 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5644 h->root.root.string);
5645 #endif
5646
5647 /* Make sure we know what is going on here. */
5648 htab = ppc_elf_hash_table (info);
5649 BFD_ASSERT (htab->elf.dynobj != NULL
5650 && (h->needs_plt
5651 || h->type == STT_GNU_IFUNC
5652 || h->u.weakdef != NULL
5653 || (h->def_dynamic
5654 && h->ref_regular
5655 && !h->def_regular)));
5656
5657 /* Deal with function syms. */
5658 if (h->type == STT_FUNC
5659 || h->type == STT_GNU_IFUNC
5660 || h->needs_plt)
5661 {
5662 /* Clear procedure linkage table information for any symbol that
5663 won't need a .plt entry. */
5664 struct plt_entry *ent;
5665 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5666 if (ent->plt.refcount > 0)
5667 break;
5668 if (ent == NULL
5669 || (h->type != STT_GNU_IFUNC
5670 && (SYMBOL_CALLS_LOCAL (info, h)
5671 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))))
5672 {
5673 /* A PLT entry is not required/allowed when:
5674
5675 1. We are not using ld.so; because then the PLT entry
5676 can't be set up, so we can't use one. In this case,
5677 ppc_elf_adjust_dynamic_symbol won't even be called.
5678
5679 2. GC has rendered the entry unused.
5680
5681 3. We know for certain that a call to this symbol
5682 will go to this object, or will remain undefined. */
5683 h->plt.plist = NULL;
5684 h->needs_plt = 0;
5685 h->pointer_equality_needed = 0;
5686 }
5687 else
5688 {
5689 /* Taking a function's address in a read/write section
5690 doesn't require us to define the function symbol in the
5691 executable on a plt call stub. A dynamic reloc can
5692 be used instead, giving better runtime performance.
5693 (Calls via that function pointer don't need to bounce
5694 through the plt call stub.) Similarly, use a dynamic
5695 reloc for a weak reference when possible, allowing the
5696 resolution of the symbol to be set at load time rather
5697 than link time. */
5698 if ((h->pointer_equality_needed
5699 || (!h->ref_regular_nonweak && h->non_got_ref))
5700 && !htab->is_vxworks
5701 && !ppc_elf_hash_entry (h)->has_sda_refs
5702 && !readonly_dynrelocs (h, NULL))
5703 {
5704 h->pointer_equality_needed = 0;
5705 /* After adjust_dynamic_symbol, non_got_ref set in the
5706 non-pic case means that dyn_relocs for this symbol
5707 should be discarded. */
5708 h->non_got_ref = 0;
5709 }
5710 }
5711 h->protected_def = 0;
5712 return TRUE;
5713 }
5714 else
5715 h->plt.plist = NULL;
5716
5717 /* If this is a weak symbol, and there is a real definition, the
5718 processor independent code will have arranged for us to see the
5719 real definition first, and we can just use the same value. */
5720 if (h->u.weakdef != NULL)
5721 {
5722 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5723 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5724 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5725 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5726 if (ELIMINATE_COPY_RELOCS)
5727 h->non_got_ref = h->u.weakdef->non_got_ref;
5728 return TRUE;
5729 }
5730
5731 /* This is a reference to a symbol defined by a dynamic object which
5732 is not a function. */
5733
5734 /* If we are creating a shared library, we must presume that the
5735 only references to the symbol are via the global offset table.
5736 For such cases we need not do anything here; the relocations will
5737 be handled correctly by relocate_section. */
5738 if (bfd_link_pic (info))
5739 {
5740 h->protected_def = 0;
5741 return TRUE;
5742 }
5743
5744 /* If there are no references to this symbol that do not use the
5745 GOT, we don't need to generate a copy reloc. */
5746 if (!h->non_got_ref)
5747 {
5748 h->protected_def = 0;
5749 return TRUE;
5750 }
5751
5752 /* Protected variables do not work with .dynbss. The copy in
5753 .dynbss won't be used by the shared library with the protected
5754 definition for the variable. Editing to PIC, or text relocations
5755 are preferable to an incorrect program. */
5756 if (h->protected_def)
5757 {
5758 if (ELIMINATE_COPY_RELOCS
5759 && ppc_elf_hash_entry (h)->has_addr16_ha
5760 && ppc_elf_hash_entry (h)->has_addr16_lo
5761 && htab->params->pic_fixup == 0
5762 && info->disable_target_specific_optimizations <= 1)
5763 htab->params->pic_fixup = 1;
5764 h->non_got_ref = 0;
5765 return TRUE;
5766 }
5767
5768 /* If -z nocopyreloc was given, we won't generate them either. */
5769 if (info->nocopyreloc)
5770 {
5771 h->non_got_ref = 0;
5772 return TRUE;
5773 }
5774
5775 /* If we didn't find any dynamic relocs in read-only sections, then
5776 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5777 We can't do this if there are any small data relocations. This
5778 doesn't work on VxWorks, where we can not have dynamic
5779 relocations (other than copy and jump slot relocations) in an
5780 executable. */
5781 if (ELIMINATE_COPY_RELOCS
5782 && !ppc_elf_hash_entry (h)->has_sda_refs
5783 && !htab->is_vxworks
5784 && !h->def_regular
5785 && !readonly_dynrelocs (h, NULL))
5786 {
5787 h->non_got_ref = 0;
5788 return TRUE;
5789 }
5790
5791 /* We must allocate the symbol in our .dynbss section, which will
5792 become part of the .bss section of the executable. There will be
5793 an entry for this symbol in the .dynsym section. The dynamic
5794 object will contain position independent code, so all references
5795 from the dynamic object to this symbol will go through the global
5796 offset table. The dynamic linker will use the .dynsym entry to
5797 determine the address it must put in the global offset table, so
5798 both the dynamic object and the regular object will refer to the
5799 same memory location for the variable.
5800
5801 Of course, if the symbol is referenced using SDAREL relocs, we
5802 must instead allocate it in .sbss. */
5803
5804 if (ppc_elf_hash_entry (h)->has_sda_refs)
5805 s = htab->dynsbss;
5806 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5807 s = htab->elf.sdynrelro;
5808 else
5809 s = htab->elf.sdynbss;
5810 BFD_ASSERT (s != NULL);
5811
5812 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5813 copy the initial value out of the dynamic object and into the
5814 runtime process image. We need to remember the offset into the
5815 .rela.bss section we are going to use. */
5816 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5817 {
5818 asection *srel;
5819
5820 if (ppc_elf_hash_entry (h)->has_sda_refs)
5821 srel = htab->relsbss;
5822 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5823 srel = htab->elf.sreldynrelro;
5824 else
5825 srel = htab->elf.srelbss;
5826 BFD_ASSERT (srel != NULL);
5827 srel->size += sizeof (Elf32_External_Rela);
5828 h->needs_copy = 1;
5829 }
5830
5831 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5832 }
5833 \f
5834 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5835 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5836 specifying the addend on the plt relocation. For -fpic code, the sym
5837 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5838 xxxxxxxx.got2.plt_pic32.<callee>. */
5839
5840 static bfd_boolean
5841 add_stub_sym (struct plt_entry *ent,
5842 struct elf_link_hash_entry *h,
5843 struct bfd_link_info *info)
5844 {
5845 struct elf_link_hash_entry *sh;
5846 size_t len1, len2, len3;
5847 char *name;
5848 const char *stub;
5849 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5850
5851 if (bfd_link_pic (info))
5852 stub = ".plt_pic32.";
5853 else
5854 stub = ".plt_call32.";
5855
5856 len1 = strlen (h->root.root.string);
5857 len2 = strlen (stub);
5858 len3 = 0;
5859 if (ent->sec)
5860 len3 = strlen (ent->sec->name);
5861 name = bfd_malloc (len1 + len2 + len3 + 9);
5862 if (name == NULL)
5863 return FALSE;
5864 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5865 if (ent->sec)
5866 memcpy (name + 8, ent->sec->name, len3);
5867 memcpy (name + 8 + len3, stub, len2);
5868 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5869 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5870 if (sh == NULL)
5871 return FALSE;
5872 if (sh->root.type == bfd_link_hash_new)
5873 {
5874 sh->root.type = bfd_link_hash_defined;
5875 sh->root.u.def.section = htab->glink;
5876 sh->root.u.def.value = ent->glink_offset;
5877 sh->ref_regular = 1;
5878 sh->def_regular = 1;
5879 sh->ref_regular_nonweak = 1;
5880 sh->forced_local = 1;
5881 sh->non_elf = 0;
5882 sh->root.linker_def = 1;
5883 }
5884 return TRUE;
5885 }
5886
5887 /* Allocate NEED contiguous space in .got, and return the offset.
5888 Handles allocation of the got header when crossing 32k. */
5889
5890 static bfd_vma
5891 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5892 {
5893 bfd_vma where;
5894 unsigned int max_before_header;
5895
5896 if (htab->plt_type == PLT_VXWORKS)
5897 {
5898 where = htab->elf.sgot->size;
5899 htab->elf.sgot->size += need;
5900 }
5901 else
5902 {
5903 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5904 if (need <= htab->got_gap)
5905 {
5906 where = max_before_header - htab->got_gap;
5907 htab->got_gap -= need;
5908 }
5909 else
5910 {
5911 if (htab->elf.sgot->size + need > max_before_header
5912 && htab->elf.sgot->size <= max_before_header)
5913 {
5914 htab->got_gap = max_before_header - htab->elf.sgot->size;
5915 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5916 }
5917 where = htab->elf.sgot->size;
5918 htab->elf.sgot->size += need;
5919 }
5920 }
5921 return where;
5922 }
5923
5924 /* If H is undefined, make it dynamic if that makes sense. */
5925
5926 static bfd_boolean
5927 ensure_undef_dynamic (struct bfd_link_info *info,
5928 struct elf_link_hash_entry *h)
5929 {
5930 struct elf_link_hash_table *htab = elf_hash_table (info);
5931
5932 if (htab->dynamic_sections_created
5933 && ((info->dynamic_undefined_weak != 0
5934 && h->root.type == bfd_link_hash_undefweak)
5935 || h->root.type == bfd_link_hash_undefined)
5936 && h->dynindx == -1
5937 && !h->forced_local
5938 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5939 return bfd_elf_link_record_dynamic_symbol (info, h);
5940 return TRUE;
5941 }
5942
5943 /* Allocate space in associated reloc sections for dynamic relocs. */
5944
5945 static bfd_boolean
5946 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5947 {
5948 struct bfd_link_info *info = inf;
5949 struct ppc_elf_link_hash_entry *eh;
5950 struct ppc_elf_link_hash_table *htab;
5951 struct elf_dyn_relocs *p;
5952 bfd_boolean dyn;
5953
5954 if (h->root.type == bfd_link_hash_indirect)
5955 return TRUE;
5956
5957 htab = ppc_elf_hash_table (info);
5958 eh = (struct ppc_elf_link_hash_entry *) h;
5959 if (eh->elf.got.refcount > 0
5960 || (ELIMINATE_COPY_RELOCS
5961 && !eh->elf.def_regular
5962 && eh->elf.protected_def
5963 && eh->has_addr16_ha
5964 && eh->has_addr16_lo
5965 && htab->params->pic_fixup > 0))
5966 {
5967 unsigned int need;
5968
5969 /* Make sure this symbol is output as a dynamic symbol. */
5970 if (!ensure_undef_dynamic (info, &eh->elf))
5971 return FALSE;
5972
5973 need = 0;
5974 if ((eh->tls_mask & TLS_TLS) != 0)
5975 {
5976 if ((eh->tls_mask & TLS_LD) != 0)
5977 {
5978 if (!eh->elf.def_dynamic)
5979 /* We'll just use htab->tlsld_got.offset. This should
5980 always be the case. It's a little odd if we have
5981 a local dynamic reloc against a non-local symbol. */
5982 htab->tlsld_got.refcount += 1;
5983 else
5984 need += 8;
5985 }
5986 if ((eh->tls_mask & TLS_GD) != 0)
5987 need += 8;
5988 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5989 need += 4;
5990 if ((eh->tls_mask & TLS_DTPREL) != 0)
5991 need += 4;
5992 }
5993 else
5994 need += 4;
5995 if (need == 0)
5996 eh->elf.got.offset = (bfd_vma) -1;
5997 else
5998 {
5999 eh->elf.got.offset = allocate_got (htab, need);
6000 if ((bfd_link_pic (info)
6001 || (htab->elf.dynamic_sections_created
6002 && eh->elf.dynindx != -1
6003 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6004 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6005 {
6006 asection *rsec = htab->elf.srelgot;
6007
6008 if (eh->elf.type == STT_GNU_IFUNC)
6009 rsec = htab->elf.irelplt;
6010 /* All the entries we allocated need relocs.
6011 Except LD only needs one. */
6012 if ((eh->tls_mask & TLS_LD) != 0
6013 && eh->elf.def_dynamic)
6014 need -= 4;
6015 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6016 }
6017 }
6018 }
6019 else
6020 eh->elf.got.offset = (bfd_vma) -1;
6021
6022 /* If no dynamic sections we can't have dynamic relocs, except for
6023 IFUNCs which are handled even in static executables. */
6024 if (!htab->elf.dynamic_sections_created
6025 && h->type != STT_GNU_IFUNC)
6026 eh->dyn_relocs = NULL;
6027
6028 if (eh->dyn_relocs == NULL)
6029 ;
6030
6031 /* In the shared -Bsymbolic case, discard space allocated for
6032 dynamic pc-relative relocs against symbols which turn out to be
6033 defined in regular objects. For the normal shared case, discard
6034 space for relocs that have become local due to symbol visibility
6035 changes. */
6036 else if (bfd_link_pic (info))
6037 {
6038 /* Discard relocs on undefined symbols that must be local. */
6039 if (h->root.type == bfd_link_hash_undefined
6040 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6041 eh->dyn_relocs = NULL;
6042
6043 /* Also discard relocs on undefined weak syms with non-default
6044 visibility, or when dynamic_undefined_weak says so. */
6045 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6046 eh->dyn_relocs = NULL;
6047
6048 /* Relocs that use pc_count are those that appear on a call insn,
6049 or certain REL relocs (see must_be_dyn_reloc) that can be
6050 generated via assembly. We want calls to protected symbols to
6051 resolve directly to the function rather than going via the plt.
6052 If people want function pointer comparisons to work as expected
6053 then they should avoid writing weird assembly. */
6054 else if (SYMBOL_CALLS_LOCAL (info, h))
6055 {
6056 struct elf_dyn_relocs **pp;
6057
6058 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6059 {
6060 p->count -= p->pc_count;
6061 p->pc_count = 0;
6062 if (p->count == 0)
6063 *pp = p->next;
6064 else
6065 pp = &p->next;
6066 }
6067 }
6068
6069 if (htab->is_vxworks)
6070 {
6071 struct elf_dyn_relocs **pp;
6072
6073 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6074 {
6075 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6076 *pp = p->next;
6077 else
6078 pp = &p->next;
6079 }
6080 }
6081
6082 if (eh->dyn_relocs != NULL)
6083 {
6084 /* Make sure this symbol is output as a dynamic symbol. */
6085 if (!ensure_undef_dynamic (info, h))
6086 return FALSE;
6087 }
6088 }
6089 else if (ELIMINATE_COPY_RELOCS)
6090 {
6091 /* For the non-pic case, discard space for relocs against
6092 symbols which turn out to need copy relocs or are not
6093 dynamic. */
6094 if (!h->non_got_ref
6095 && !h->def_regular
6096 && !(h->protected_def
6097 && eh->has_addr16_ha
6098 && eh->has_addr16_lo
6099 && htab->params->pic_fixup > 0))
6100 {
6101 /* Make sure this symbol is output as a dynamic symbol. */
6102 if (!ensure_undef_dynamic (info, h))
6103 return FALSE;
6104
6105 if (h->dynindx == -1)
6106 eh->dyn_relocs = NULL;
6107 }
6108 else
6109 eh->dyn_relocs = NULL;
6110 }
6111
6112 /* Allocate space. */
6113 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6114 {
6115 asection *sreloc = elf_section_data (p->sec)->sreloc;
6116 if (eh->elf.type == STT_GNU_IFUNC)
6117 sreloc = htab->elf.irelplt;
6118 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6119 }
6120
6121 /* Handle PLT relocs. Done last, after dynindx has settled. */
6122 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6123 if (dyn || h->type == STT_GNU_IFUNC)
6124 {
6125 struct plt_entry *ent;
6126 bfd_boolean doneone = FALSE;
6127 bfd_vma plt_offset = 0, glink_offset = 0;
6128
6129 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6130 if (ent->plt.refcount > 0)
6131 {
6132 asection *s = htab->elf.splt;
6133
6134 if (!dyn)
6135 s = htab->elf.iplt;
6136
6137 if (htab->plt_type == PLT_NEW || !dyn)
6138 {
6139 if (!doneone)
6140 {
6141 plt_offset = s->size;
6142 s->size += 4;
6143 }
6144 ent->plt.offset = plt_offset;
6145
6146 s = htab->glink;
6147 if (!doneone || bfd_link_pic (info))
6148 {
6149 glink_offset = s->size;
6150 s->size += GLINK_ENTRY_SIZE;
6151 if (h == htab->tls_get_addr
6152 && !htab->params->no_tls_get_addr_opt)
6153 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6154 }
6155 if (!doneone
6156 && !bfd_link_pic (info)
6157 && h->def_dynamic
6158 && !h->def_regular)
6159 {
6160 h->root.u.def.section = s;
6161 h->root.u.def.value = glink_offset;
6162 }
6163 ent->glink_offset = glink_offset;
6164
6165 if (htab->params->emit_stub_syms
6166 && !add_stub_sym (ent, h, info))
6167 return FALSE;
6168 }
6169 else
6170 {
6171 if (!doneone)
6172 {
6173 /* If this is the first .plt entry, make room
6174 for the special first entry. */
6175 if (s->size == 0)
6176 s->size += htab->plt_initial_entry_size;
6177
6178 /* The PowerPC PLT is actually composed of two
6179 parts, the first part is 2 words (for a load
6180 and a jump), and then there is a remaining
6181 word available at the end. */
6182 plt_offset = (htab->plt_initial_entry_size
6183 + (htab->plt_slot_size
6184 * ((s->size
6185 - htab->plt_initial_entry_size)
6186 / htab->plt_entry_size)));
6187
6188 /* If this symbol is not defined in a regular
6189 file, and we are not generating a shared
6190 library, then set the symbol to this location
6191 in the .plt. This is to avoid text
6192 relocations, and is required to make
6193 function pointers compare as equal between
6194 the normal executable and the shared library. */
6195 if (! bfd_link_pic (info)
6196 && h->def_dynamic
6197 && !h->def_regular)
6198 {
6199 h->root.u.def.section = s;
6200 h->root.u.def.value = plt_offset;
6201 }
6202
6203 /* Make room for this entry. */
6204 s->size += htab->plt_entry_size;
6205 /* After the 8192nd entry, room for two entries
6206 is allocated. */
6207 if (htab->plt_type == PLT_OLD
6208 && (s->size - htab->plt_initial_entry_size)
6209 / htab->plt_entry_size
6210 > PLT_NUM_SINGLE_ENTRIES)
6211 s->size += htab->plt_entry_size;
6212 }
6213 ent->plt.offset = plt_offset;
6214 }
6215
6216 /* We also need to make an entry in the .rela.plt section. */
6217 if (!doneone)
6218 {
6219 if (!dyn)
6220 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6221 else
6222 {
6223 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6224
6225 if (htab->plt_type == PLT_VXWORKS)
6226 {
6227 /* Allocate space for the unloaded relocations. */
6228 if (!bfd_link_pic (info)
6229 && htab->elf.dynamic_sections_created)
6230 {
6231 if (ent->plt.offset
6232 == (bfd_vma) htab->plt_initial_entry_size)
6233 {
6234 htab->srelplt2->size
6235 += (sizeof (Elf32_External_Rela)
6236 * VXWORKS_PLTRESOLVE_RELOCS);
6237 }
6238
6239 htab->srelplt2->size
6240 += (sizeof (Elf32_External_Rela)
6241 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6242 }
6243
6244 /* Every PLT entry has an associated GOT entry in
6245 .got.plt. */
6246 htab->elf.sgotplt->size += 4;
6247 }
6248 }
6249 doneone = TRUE;
6250 }
6251 }
6252 else
6253 ent->plt.offset = (bfd_vma) -1;
6254
6255 if (!doneone)
6256 {
6257 h->plt.plist = NULL;
6258 h->needs_plt = 0;
6259 }
6260 }
6261 else
6262 {
6263 h->plt.plist = NULL;
6264 h->needs_plt = 0;
6265 }
6266
6267 return TRUE;
6268 }
6269
6270 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6271 read-only sections. */
6272
6273 static bfd_boolean
6274 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6275 {
6276 struct bfd_link_info *info;
6277
6278 if (h->root.type == bfd_link_hash_indirect)
6279 return TRUE;
6280
6281 info = (struct bfd_link_info *) info_p;
6282 if (readonly_dynrelocs (h, info))
6283 {
6284 info->flags |= DF_TEXTREL;
6285
6286 /* Not an error, just cut short the traversal. */
6287 return FALSE;
6288 }
6289 return TRUE;
6290 }
6291
6292 static const unsigned char glink_eh_frame_cie[] =
6293 {
6294 0, 0, 0, 16, /* length. */
6295 0, 0, 0, 0, /* id. */
6296 1, /* CIE version. */
6297 'z', 'R', 0, /* Augmentation string. */
6298 4, /* Code alignment. */
6299 0x7c, /* Data alignment. */
6300 65, /* RA reg. */
6301 1, /* Augmentation size. */
6302 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6303 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6304 };
6305
6306 /* Set the sizes of the dynamic sections. */
6307
6308 static bfd_boolean
6309 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6310 struct bfd_link_info *info)
6311 {
6312 struct ppc_elf_link_hash_table *htab;
6313 asection *s;
6314 bfd_boolean relocs;
6315 bfd *ibfd;
6316
6317 #ifdef DEBUG
6318 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6319 #endif
6320
6321 htab = ppc_elf_hash_table (info);
6322 BFD_ASSERT (htab->elf.dynobj != NULL);
6323
6324 if (elf_hash_table (info)->dynamic_sections_created)
6325 {
6326 /* Set the contents of the .interp section to the interpreter. */
6327 if (bfd_link_executable (info) && !info->nointerp)
6328 {
6329 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6330 BFD_ASSERT (s != NULL);
6331 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6332 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6333 }
6334 }
6335
6336 if (htab->plt_type == PLT_OLD)
6337 htab->got_header_size = 16;
6338 else if (htab->plt_type == PLT_NEW)
6339 htab->got_header_size = 12;
6340
6341 /* Set up .got offsets for local syms, and space for local dynamic
6342 relocs. */
6343 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6344 {
6345 bfd_signed_vma *local_got;
6346 bfd_signed_vma *end_local_got;
6347 struct plt_entry **local_plt;
6348 struct plt_entry **end_local_plt;
6349 char *lgot_masks;
6350 bfd_size_type locsymcount;
6351 Elf_Internal_Shdr *symtab_hdr;
6352
6353 if (!is_ppc_elf (ibfd))
6354 continue;
6355
6356 for (s = ibfd->sections; s != NULL; s = s->next)
6357 {
6358 struct ppc_dyn_relocs *p;
6359
6360 for (p = ((struct ppc_dyn_relocs *)
6361 elf_section_data (s)->local_dynrel);
6362 p != NULL;
6363 p = p->next)
6364 {
6365 if (!bfd_is_abs_section (p->sec)
6366 && bfd_is_abs_section (p->sec->output_section))
6367 {
6368 /* Input section has been discarded, either because
6369 it is a copy of a linkonce section or due to
6370 linker script /DISCARD/, so we'll be discarding
6371 the relocs too. */
6372 }
6373 else if (htab->is_vxworks
6374 && strcmp (p->sec->output_section->name,
6375 ".tls_vars") == 0)
6376 {
6377 /* Relocations in vxworks .tls_vars sections are
6378 handled specially by the loader. */
6379 }
6380 else if (p->count != 0)
6381 {
6382 asection *sreloc = elf_section_data (p->sec)->sreloc;
6383 if (p->ifunc)
6384 sreloc = htab->elf.irelplt;
6385 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6386 if ((p->sec->output_section->flags
6387 & (SEC_READONLY | SEC_ALLOC))
6388 == (SEC_READONLY | SEC_ALLOC))
6389 {
6390 info->flags |= DF_TEXTREL;
6391 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6392 p->sec->owner, p->sec);
6393 }
6394 }
6395 }
6396 }
6397
6398 local_got = elf_local_got_refcounts (ibfd);
6399 if (!local_got)
6400 continue;
6401
6402 symtab_hdr = &elf_symtab_hdr (ibfd);
6403 locsymcount = symtab_hdr->sh_info;
6404 end_local_got = local_got + locsymcount;
6405 local_plt = (struct plt_entry **) end_local_got;
6406 end_local_plt = local_plt + locsymcount;
6407 lgot_masks = (char *) end_local_plt;
6408
6409 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6410 if (*local_got > 0)
6411 {
6412 unsigned int need = 0;
6413 if ((*lgot_masks & TLS_TLS) != 0)
6414 {
6415 if ((*lgot_masks & TLS_GD) != 0)
6416 need += 8;
6417 if ((*lgot_masks & TLS_LD) != 0)
6418 htab->tlsld_got.refcount += 1;
6419 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6420 need += 4;
6421 if ((*lgot_masks & TLS_DTPREL) != 0)
6422 need += 4;
6423 }
6424 else
6425 need += 4;
6426 if (need == 0)
6427 *local_got = (bfd_vma) -1;
6428 else
6429 {
6430 *local_got = allocate_got (htab, need);
6431 if (bfd_link_pic (info))
6432 {
6433 asection *srel = htab->elf.srelgot;
6434 if ((*lgot_masks & PLT_IFUNC) != 0)
6435 srel = htab->elf.irelplt;
6436 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6437 }
6438 }
6439 }
6440 else
6441 *local_got = (bfd_vma) -1;
6442
6443 if (htab->is_vxworks)
6444 continue;
6445
6446 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6447 for (; local_plt < end_local_plt; ++local_plt)
6448 {
6449 struct plt_entry *ent;
6450 bfd_boolean doneone = FALSE;
6451 bfd_vma plt_offset = 0, glink_offset = 0;
6452
6453 for (ent = *local_plt; ent != NULL; ent = ent->next)
6454 if (ent->plt.refcount > 0)
6455 {
6456 s = htab->elf.iplt;
6457
6458 if (!doneone)
6459 {
6460 plt_offset = s->size;
6461 s->size += 4;
6462 }
6463 ent->plt.offset = plt_offset;
6464
6465 s = htab->glink;
6466 if (!doneone || bfd_link_pic (info))
6467 {
6468 glink_offset = s->size;
6469 s->size += GLINK_ENTRY_SIZE;
6470 }
6471 ent->glink_offset = glink_offset;
6472
6473 if (!doneone)
6474 {
6475 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6476 doneone = TRUE;
6477 }
6478 }
6479 else
6480 ent->plt.offset = (bfd_vma) -1;
6481 }
6482 }
6483
6484 /* Allocate space for global sym dynamic relocs. */
6485 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6486
6487 if (htab->tlsld_got.refcount > 0)
6488 {
6489 htab->tlsld_got.offset = allocate_got (htab, 8);
6490 if (bfd_link_pic (info))
6491 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6492 }
6493 else
6494 htab->tlsld_got.offset = (bfd_vma) -1;
6495
6496 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6497 {
6498 unsigned int g_o_t = 32768;
6499
6500 /* If we haven't allocated the header, do so now. When we get here,
6501 for old plt/got the got size will be 0 to 32764 (not allocated),
6502 or 32780 to 65536 (header allocated). For new plt/got, the
6503 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6504 if (htab->elf.sgot->size <= 32768)
6505 {
6506 g_o_t = htab->elf.sgot->size;
6507 if (htab->plt_type == PLT_OLD)
6508 g_o_t += 4;
6509 htab->elf.sgot->size += htab->got_header_size;
6510 }
6511
6512 htab->elf.hgot->root.u.def.value = g_o_t;
6513 }
6514 if (bfd_link_pic (info))
6515 {
6516 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6517
6518 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6519 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6520 }
6521 if (info->emitrelocations)
6522 {
6523 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6524
6525 if (sda != NULL && sda->ref_regular)
6526 sda->root.u.def.section->flags |= SEC_KEEP;
6527 sda = htab->sdata[1].sym;
6528 if (sda != NULL && sda->ref_regular)
6529 sda->root.u.def.section->flags |= SEC_KEEP;
6530 }
6531
6532 if (htab->glink != NULL
6533 && htab->glink->size != 0
6534 && htab->elf.dynamic_sections_created)
6535 {
6536 htab->glink_pltresolve = htab->glink->size;
6537 /* Space for the branch table. ??? We don't need entries for
6538 non-dynamic symbols in this table. This case can arise with
6539 static ifuncs or forced local ifuncs. */
6540 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6541 /* Pad out to align the start of PLTresolve. */
6542 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6543 ? 63 : 15);
6544 htab->glink->size += GLINK_PLTRESOLVE;
6545
6546 if (htab->params->emit_stub_syms)
6547 {
6548 struct elf_link_hash_entry *sh;
6549 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6550 TRUE, FALSE, FALSE);
6551 if (sh == NULL)
6552 return FALSE;
6553 if (sh->root.type == bfd_link_hash_new)
6554 {
6555 sh->root.type = bfd_link_hash_defined;
6556 sh->root.u.def.section = htab->glink;
6557 sh->root.u.def.value = htab->glink_pltresolve;
6558 sh->ref_regular = 1;
6559 sh->def_regular = 1;
6560 sh->ref_regular_nonweak = 1;
6561 sh->forced_local = 1;
6562 sh->non_elf = 0;
6563 sh->root.linker_def = 1;
6564 }
6565 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6566 TRUE, FALSE, FALSE);
6567 if (sh == NULL)
6568 return FALSE;
6569 if (sh->root.type == bfd_link_hash_new)
6570 {
6571 sh->root.type = bfd_link_hash_defined;
6572 sh->root.u.def.section = htab->glink;
6573 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6574 sh->ref_regular = 1;
6575 sh->def_regular = 1;
6576 sh->ref_regular_nonweak = 1;
6577 sh->forced_local = 1;
6578 sh->non_elf = 0;
6579 sh->root.linker_def = 1;
6580 }
6581 }
6582 }
6583
6584 if (htab->glink != NULL
6585 && htab->glink->size != 0
6586 && htab->glink_eh_frame != NULL
6587 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6588 && _bfd_elf_eh_frame_present (info))
6589 {
6590 s = htab->glink_eh_frame;
6591 s->size = sizeof (glink_eh_frame_cie) + 20;
6592 if (bfd_link_pic (info))
6593 {
6594 s->size += 4;
6595 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6596 s->size += 4;
6597 }
6598 }
6599
6600 /* We've now determined the sizes of the various dynamic sections.
6601 Allocate memory for them. */
6602 relocs = FALSE;
6603 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6604 {
6605 bfd_boolean strip_section = TRUE;
6606
6607 if ((s->flags & SEC_LINKER_CREATED) == 0)
6608 continue;
6609
6610 if (s == htab->elf.splt
6611 || s == htab->elf.sgot)
6612 {
6613 /* We'd like to strip these sections if they aren't needed, but if
6614 we've exported dynamic symbols from them we must leave them.
6615 It's too late to tell BFD to get rid of the symbols. */
6616 if (htab->elf.hplt != NULL)
6617 strip_section = FALSE;
6618 /* Strip this section if we don't need it; see the
6619 comment below. */
6620 }
6621 else if (s == htab->elf.iplt
6622 || s == htab->glink
6623 || s == htab->glink_eh_frame
6624 || s == htab->elf.sgotplt
6625 || s == htab->sbss
6626 || s == htab->elf.sdynbss
6627 || s == htab->elf.sdynrelro
6628 || s == htab->dynsbss)
6629 {
6630 /* Strip these too. */
6631 }
6632 else if (s == htab->sdata[0].section
6633 || s == htab->sdata[1].section)
6634 {
6635 strip_section = (s->flags & SEC_KEEP) == 0;
6636 }
6637 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6638 ".rela"))
6639 {
6640 if (s->size != 0)
6641 {
6642 /* Remember whether there are any relocation sections. */
6643 relocs = TRUE;
6644
6645 /* We use the reloc_count field as a counter if we need
6646 to copy relocs into the output file. */
6647 s->reloc_count = 0;
6648 }
6649 }
6650 else
6651 {
6652 /* It's not one of our sections, so don't allocate space. */
6653 continue;
6654 }
6655
6656 if (s->size == 0 && strip_section)
6657 {
6658 /* If we don't need this section, strip it from the
6659 output file. This is mostly to handle .rela.bss and
6660 .rela.plt. We must create both sections in
6661 create_dynamic_sections, because they must be created
6662 before the linker maps input sections to output
6663 sections. The linker does that before
6664 adjust_dynamic_symbol is called, and it is that
6665 function which decides whether anything needs to go
6666 into these sections. */
6667 s->flags |= SEC_EXCLUDE;
6668 continue;
6669 }
6670
6671 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6672 continue;
6673
6674 /* Allocate memory for the section contents. */
6675 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6676 if (s->contents == NULL)
6677 return FALSE;
6678 }
6679
6680 if (htab->elf.dynamic_sections_created)
6681 {
6682 /* Add some entries to the .dynamic section. We fill in the
6683 values later, in ppc_elf_finish_dynamic_sections, but we
6684 must add the entries now so that we get the correct size for
6685 the .dynamic section. The DT_DEBUG entry is filled in by the
6686 dynamic linker and used by the debugger. */
6687 #define add_dynamic_entry(TAG, VAL) \
6688 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6689
6690 if (bfd_link_executable (info))
6691 {
6692 if (!add_dynamic_entry (DT_DEBUG, 0))
6693 return FALSE;
6694 }
6695
6696 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6697 {
6698 if (!add_dynamic_entry (DT_PLTGOT, 0)
6699 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6700 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6701 || !add_dynamic_entry (DT_JMPREL, 0))
6702 return FALSE;
6703 }
6704
6705 if (htab->plt_type == PLT_NEW
6706 && htab->glink != NULL
6707 && htab->glink->size != 0)
6708 {
6709 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6710 return FALSE;
6711 if (!htab->params->no_tls_get_addr_opt
6712 && htab->tls_get_addr != NULL
6713 && htab->tls_get_addr->plt.plist != NULL
6714 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6715 return FALSE;
6716 }
6717
6718 if (relocs)
6719 {
6720 if (!add_dynamic_entry (DT_RELA, 0)
6721 || !add_dynamic_entry (DT_RELASZ, 0)
6722 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6723 return FALSE;
6724 }
6725
6726 /* If any dynamic relocs apply to a read-only section, then we
6727 need a DT_TEXTREL entry. */
6728 if ((info->flags & DF_TEXTREL) == 0)
6729 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6730 info);
6731
6732 if ((info->flags & DF_TEXTREL) != 0)
6733 {
6734 if (!add_dynamic_entry (DT_TEXTREL, 0))
6735 return FALSE;
6736 }
6737 if (htab->is_vxworks
6738 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6739 return FALSE;
6740 }
6741 #undef add_dynamic_entry
6742
6743 if (htab->glink_eh_frame != NULL
6744 && htab->glink_eh_frame->contents != NULL)
6745 {
6746 unsigned char *p = htab->glink_eh_frame->contents;
6747 bfd_vma val;
6748
6749 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6750 /* CIE length (rewrite in case little-endian). */
6751 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6752 p += sizeof (glink_eh_frame_cie);
6753 /* FDE length. */
6754 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6755 bfd_put_32 (htab->elf.dynobj, val, p);
6756 p += 4;
6757 /* CIE pointer. */
6758 val = p - htab->glink_eh_frame->contents;
6759 bfd_put_32 (htab->elf.dynobj, val, p);
6760 p += 4;
6761 /* Offset to .glink. Set later. */
6762 p += 4;
6763 /* .glink size. */
6764 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6765 p += 4;
6766 /* Augmentation. */
6767 p += 1;
6768
6769 if (bfd_link_pic (info)
6770 && htab->elf.dynamic_sections_created)
6771 {
6772 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6773 if (adv < 64)
6774 *p++ = DW_CFA_advance_loc + adv;
6775 else if (adv < 256)
6776 {
6777 *p++ = DW_CFA_advance_loc1;
6778 *p++ = adv;
6779 }
6780 else if (adv < 65536)
6781 {
6782 *p++ = DW_CFA_advance_loc2;
6783 bfd_put_16 (htab->elf.dynobj, adv, p);
6784 p += 2;
6785 }
6786 else
6787 {
6788 *p++ = DW_CFA_advance_loc4;
6789 bfd_put_32 (htab->elf.dynobj, adv, p);
6790 p += 4;
6791 }
6792 *p++ = DW_CFA_register;
6793 *p++ = 65;
6794 p++;
6795 *p++ = DW_CFA_advance_loc + 4;
6796 *p++ = DW_CFA_restore_extended;
6797 *p++ = 65;
6798 }
6799 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6800 == htab->glink_eh_frame->size);
6801 }
6802
6803 return TRUE;
6804 }
6805
6806 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6807 if it looks like nothing is using them. */
6808
6809 static void
6810 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6811 {
6812 struct elf_link_hash_entry *sda = lsect->sym;
6813
6814 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6815 {
6816 asection *s;
6817
6818 s = bfd_get_section_by_name (output_bfd, lsect->name);
6819 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6820 {
6821 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6822 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6823 {
6824 sda->def_regular = 0;
6825 /* This is somewhat magic. See elf_link_output_extsym. */
6826 sda->ref_dynamic = 1;
6827 sda->forced_local = 0;
6828 }
6829 }
6830 }
6831 }
6832
6833 void
6834 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6835 {
6836 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6837
6838 if (htab != NULL)
6839 {
6840 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6841 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6842 }
6843 }
6844
6845
6846 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6847
6848 static bfd_boolean
6849 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6850 {
6851 if (h->plt.plist != NULL
6852 && !h->def_regular
6853 && (!h->pointer_equality_needed
6854 || !h->ref_regular_nonweak))
6855 return FALSE;
6856
6857 return _bfd_elf_hash_symbol (h);
6858 }
6859 \f
6860 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6861
6862 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6863 used for some functions that are allowed to break the ABI). */
6864 static const int shared_stub_entry[] =
6865 {
6866 0x7c0802a6, /* mflr 0 */
6867 0x429f0005, /* bcl 20, 31, .Lxxx */
6868 0x7d8802a6, /* mflr 12 */
6869 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6870 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6871 0x7c0803a6, /* mtlr 0 */
6872 0x7d8903a6, /* mtctr 12 */
6873 0x4e800420, /* bctr */
6874 };
6875
6876 static const int stub_entry[] =
6877 {
6878 0x3d800000, /* lis 12,xxx@ha */
6879 0x398c0000, /* addi 12,12,xxx@l */
6880 0x7d8903a6, /* mtctr 12 */
6881 0x4e800420, /* bctr */
6882 };
6883
6884 struct ppc_elf_relax_info
6885 {
6886 unsigned int workaround_size;
6887 unsigned int picfixup_size;
6888 };
6889
6890 /* This function implements long branch trampolines, and the ppc476
6891 icache bug workaround. Any section needing trampolines or patch
6892 space for the workaround has its size extended so that we can
6893 add trampolines at the end of the section. */
6894
6895 static bfd_boolean
6896 ppc_elf_relax_section (bfd *abfd,
6897 asection *isec,
6898 struct bfd_link_info *link_info,
6899 bfd_boolean *again)
6900 {
6901 struct one_branch_fixup
6902 {
6903 struct one_branch_fixup *next;
6904 asection *tsec;
6905 /* Final link, can use the symbol offset. For a
6906 relocatable link we use the symbol's index. */
6907 bfd_vma toff;
6908 bfd_vma trampoff;
6909 };
6910
6911 Elf_Internal_Shdr *symtab_hdr;
6912 bfd_byte *contents = NULL;
6913 Elf_Internal_Sym *isymbuf = NULL;
6914 Elf_Internal_Rela *internal_relocs = NULL;
6915 Elf_Internal_Rela *irel, *irelend = NULL;
6916 struct one_branch_fixup *branch_fixups = NULL;
6917 struct ppc_elf_relax_info *relax_info = NULL;
6918 unsigned changes = 0;
6919 bfd_boolean workaround_change;
6920 struct ppc_elf_link_hash_table *htab;
6921 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6922 asection *got2;
6923 bfd_boolean maybe_pasted;
6924
6925 *again = FALSE;
6926
6927 /* No need to do anything with non-alloc or non-code sections. */
6928 if ((isec->flags & SEC_ALLOC) == 0
6929 || (isec->flags & SEC_CODE) == 0
6930 || (isec->flags & SEC_LINKER_CREATED) != 0
6931 || isec->size < 4)
6932 return TRUE;
6933
6934 /* We cannot represent the required PIC relocs in the output, so don't
6935 do anything. The linker doesn't support mixing -shared and -r
6936 anyway. */
6937 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6938 return TRUE;
6939
6940 htab = ppc_elf_hash_table (link_info);
6941 if (htab == NULL)
6942 return TRUE;
6943
6944 isec->size = (isec->size + 3) & -4;
6945 if (isec->rawsize == 0)
6946 isec->rawsize = isec->size;
6947 trampbase = isec->size;
6948
6949 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6950 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6951 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6952
6953 if (htab->params->ppc476_workaround
6954 || htab->params->pic_fixup > 0)
6955 {
6956 if (elf_section_data (isec)->sec_info == NULL)
6957 {
6958 elf_section_data (isec)->sec_info
6959 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6960 if (elf_section_data (isec)->sec_info == NULL)
6961 return FALSE;
6962 }
6963 relax_info = elf_section_data (isec)->sec_info;
6964 trampbase -= relax_info->workaround_size;
6965 }
6966
6967 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6968 || strcmp (isec->output_section->name, ".fini") == 0);
6969 /* Space for a branch around any trampolines. */
6970 trampoff = trampbase;
6971 if (maybe_pasted && trampbase == isec->rawsize)
6972 trampoff += 4;
6973
6974 symtab_hdr = &elf_symtab_hdr (abfd);
6975 picfixup_size = 0;
6976 if (htab->params->branch_trampolines
6977 || htab->params->pic_fixup > 0)
6978 {
6979 /* Get a copy of the native relocations. */
6980 if (isec->reloc_count != 0)
6981 {
6982 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6983 link_info->keep_memory);
6984 if (internal_relocs == NULL)
6985 goto error_return;
6986 }
6987
6988 got2 = bfd_get_section_by_name (abfd, ".got2");
6989
6990 irelend = internal_relocs + isec->reloc_count;
6991 for (irel = internal_relocs; irel < irelend; irel++)
6992 {
6993 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6994 bfd_vma toff, roff;
6995 asection *tsec;
6996 struct one_branch_fixup *f;
6997 size_t insn_offset = 0;
6998 bfd_vma max_branch_offset = 0, val;
6999 bfd_byte *hit_addr;
7000 unsigned long t0;
7001 struct elf_link_hash_entry *h;
7002 struct plt_entry **plist;
7003 unsigned char sym_type;
7004
7005 switch (r_type)
7006 {
7007 case R_PPC_REL24:
7008 case R_PPC_LOCAL24PC:
7009 case R_PPC_PLTREL24:
7010 max_branch_offset = 1 << 25;
7011 break;
7012
7013 case R_PPC_REL14:
7014 case R_PPC_REL14_BRTAKEN:
7015 case R_PPC_REL14_BRNTAKEN:
7016 max_branch_offset = 1 << 15;
7017 break;
7018
7019 case R_PPC_ADDR16_HA:
7020 if (htab->params->pic_fixup > 0)
7021 break;
7022 continue;
7023
7024 default:
7025 continue;
7026 }
7027
7028 /* Get the value of the symbol referred to by the reloc. */
7029 h = NULL;
7030 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7031 {
7032 /* A local symbol. */
7033 Elf_Internal_Sym *isym;
7034
7035 /* Read this BFD's local symbols. */
7036 if (isymbuf == NULL)
7037 {
7038 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7039 if (isymbuf == NULL)
7040 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7041 symtab_hdr->sh_info, 0,
7042 NULL, NULL, NULL);
7043 if (isymbuf == 0)
7044 goto error_return;
7045 }
7046 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7047 if (isym->st_shndx == SHN_UNDEF)
7048 tsec = bfd_und_section_ptr;
7049 else if (isym->st_shndx == SHN_ABS)
7050 tsec = bfd_abs_section_ptr;
7051 else if (isym->st_shndx == SHN_COMMON)
7052 tsec = bfd_com_section_ptr;
7053 else
7054 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7055
7056 toff = isym->st_value;
7057 sym_type = ELF_ST_TYPE (isym->st_info);
7058 }
7059 else
7060 {
7061 /* Global symbol handling. */
7062 unsigned long indx;
7063
7064 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7065 h = elf_sym_hashes (abfd)[indx];
7066
7067 while (h->root.type == bfd_link_hash_indirect
7068 || h->root.type == bfd_link_hash_warning)
7069 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7070
7071 if (h->root.type == bfd_link_hash_defined
7072 || h->root.type == bfd_link_hash_defweak)
7073 {
7074 tsec = h->root.u.def.section;
7075 toff = h->root.u.def.value;
7076 }
7077 else if (h->root.type == bfd_link_hash_undefined
7078 || h->root.type == bfd_link_hash_undefweak)
7079 {
7080 tsec = bfd_und_section_ptr;
7081 toff = bfd_link_relocatable (link_info) ? indx : 0;
7082 }
7083 else
7084 continue;
7085
7086 /* If this branch is to __tls_get_addr then we may later
7087 optimise away the call. We won't be needing a long-
7088 branch stub in that case. */
7089 if (bfd_link_executable (link_info)
7090 && h == htab->tls_get_addr
7091 && irel != internal_relocs)
7092 {
7093 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7094 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7095 unsigned int tls_mask = 0;
7096
7097 /* The previous reloc should be one of R_PPC_TLSGD or
7098 R_PPC_TLSLD, or for older object files, a reloc
7099 on the __tls_get_addr arg setup insn. Get tls
7100 mask bits from the symbol on that reloc. */
7101 if (t_symndx < symtab_hdr->sh_info)
7102 {
7103 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7104
7105 if (local_got_offsets != NULL)
7106 {
7107 struct plt_entry **local_plt = (struct plt_entry **)
7108 (local_got_offsets + symtab_hdr->sh_info);
7109 char *lgot_masks = (char *)
7110 (local_plt + symtab_hdr->sh_info);
7111 tls_mask = lgot_masks[t_symndx];
7112 }
7113 }
7114 else
7115 {
7116 struct elf_link_hash_entry *th
7117 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7118
7119 while (th->root.type == bfd_link_hash_indirect
7120 || th->root.type == bfd_link_hash_warning)
7121 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7122
7123 tls_mask
7124 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7125 }
7126
7127 /* The mask bits tell us if the call will be
7128 optimised away. */
7129 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7130 && (t_rtype == R_PPC_TLSGD
7131 || t_rtype == R_PPC_GOT_TLSGD16
7132 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7133 continue;
7134 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7135 && (t_rtype == R_PPC_TLSLD
7136 || t_rtype == R_PPC_GOT_TLSLD16
7137 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7138 continue;
7139 }
7140
7141 sym_type = h->type;
7142 }
7143
7144 if (r_type == R_PPC_ADDR16_HA)
7145 {
7146 if (h != NULL
7147 && !h->def_regular
7148 && h->protected_def
7149 && ppc_elf_hash_entry (h)->has_addr16_ha
7150 && ppc_elf_hash_entry (h)->has_addr16_lo)
7151 picfixup_size += 12;
7152 continue;
7153 }
7154
7155 /* The condition here under which we call find_plt_ent must
7156 match that in relocate_section. If we call find_plt_ent here
7157 but not in relocate_section, or vice versa, then the branch
7158 destination used here may be incorrect. */
7159 plist = NULL;
7160 if (h != NULL)
7161 {
7162 /* We know is_branch_reloc (r_type) is true. */
7163 if (h->type == STT_GNU_IFUNC
7164 || r_type == R_PPC_PLTREL24)
7165 plist = &h->plt.plist;
7166 }
7167 else if (sym_type == STT_GNU_IFUNC
7168 && elf_local_got_offsets (abfd) != NULL)
7169 {
7170 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7171 struct plt_entry **local_plt = (struct plt_entry **)
7172 (local_got_offsets + symtab_hdr->sh_info);
7173 plist = local_plt + ELF32_R_SYM (irel->r_info);
7174 }
7175 if (plist != NULL)
7176 {
7177 bfd_vma addend = 0;
7178 struct plt_entry *ent;
7179
7180 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7181 addend = irel->r_addend;
7182 ent = find_plt_ent (plist, got2, addend);
7183 if (ent != NULL)
7184 {
7185 if (htab->plt_type == PLT_NEW
7186 || h == NULL
7187 || !htab->elf.dynamic_sections_created
7188 || h->dynindx == -1)
7189 {
7190 tsec = htab->glink;
7191 toff = ent->glink_offset;
7192 }
7193 else
7194 {
7195 tsec = htab->elf.splt;
7196 toff = ent->plt.offset;
7197 }
7198 }
7199 }
7200
7201 /* If the branch and target are in the same section, you have
7202 no hope of adding stubs. We'll error out later should the
7203 branch overflow. */
7204 if (tsec == isec)
7205 continue;
7206
7207 /* There probably isn't any reason to handle symbols in
7208 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7209 attribute for a code section, and we are only looking at
7210 branches. However, implement it correctly here as a
7211 reference for other target relax_section functions. */
7212 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7213 {
7214 /* At this stage in linking, no SEC_MERGE symbol has been
7215 adjusted, so all references to such symbols need to be
7216 passed through _bfd_merged_section_offset. (Later, in
7217 relocate_section, all SEC_MERGE symbols *except* for
7218 section symbols have been adjusted.)
7219
7220 gas may reduce relocations against symbols in SEC_MERGE
7221 sections to a relocation against the section symbol when
7222 the original addend was zero. When the reloc is against
7223 a section symbol we should include the addend in the
7224 offset passed to _bfd_merged_section_offset, since the
7225 location of interest is the original symbol. On the
7226 other hand, an access to "sym+addend" where "sym" is not
7227 a section symbol should not include the addend; Such an
7228 access is presumed to be an offset from "sym"; The
7229 location of interest is just "sym". */
7230 if (sym_type == STT_SECTION)
7231 toff += irel->r_addend;
7232
7233 toff
7234 = _bfd_merged_section_offset (abfd, &tsec,
7235 elf_section_data (tsec)->sec_info,
7236 toff);
7237
7238 if (sym_type != STT_SECTION)
7239 toff += irel->r_addend;
7240 }
7241 /* PLTREL24 addends are special. */
7242 else if (r_type != R_PPC_PLTREL24)
7243 toff += irel->r_addend;
7244
7245 /* Attempted -shared link of non-pic code loses. */
7246 if ((!bfd_link_relocatable (link_info)
7247 && tsec == bfd_und_section_ptr)
7248 || tsec->output_section == NULL
7249 || (tsec->owner != NULL
7250 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7251 continue;
7252
7253 roff = irel->r_offset;
7254
7255 /* If the branch is in range, no need to do anything. */
7256 if (tsec != bfd_und_section_ptr
7257 && (!bfd_link_relocatable (link_info)
7258 /* A relocatable link may have sections moved during
7259 final link, so do not presume they remain in range. */
7260 || tsec->output_section == isec->output_section))
7261 {
7262 bfd_vma symaddr, reladdr;
7263
7264 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7265 reladdr = isec->output_section->vma + isec->output_offset + roff;
7266 if (symaddr - reladdr + max_branch_offset
7267 < 2 * max_branch_offset)
7268 continue;
7269 }
7270
7271 /* Look for an existing fixup to this address. */
7272 for (f = branch_fixups; f ; f = f->next)
7273 if (f->tsec == tsec && f->toff == toff)
7274 break;
7275
7276 if (f == NULL)
7277 {
7278 size_t size;
7279 unsigned long stub_rtype;
7280
7281 val = trampoff - roff;
7282 if (val >= max_branch_offset)
7283 /* Oh dear, we can't reach a trampoline. Don't try to add
7284 one. We'll report an error later. */
7285 continue;
7286
7287 if (bfd_link_pic (link_info))
7288 {
7289 size = 4 * ARRAY_SIZE (shared_stub_entry);
7290 insn_offset = 12;
7291 }
7292 else
7293 {
7294 size = 4 * ARRAY_SIZE (stub_entry);
7295 insn_offset = 0;
7296 }
7297 stub_rtype = R_PPC_RELAX;
7298 if (tsec == htab->elf.splt
7299 || tsec == htab->glink)
7300 {
7301 stub_rtype = R_PPC_RELAX_PLT;
7302 if (r_type == R_PPC_PLTREL24)
7303 stub_rtype = R_PPC_RELAX_PLTREL24;
7304 }
7305
7306 /* Hijack the old relocation. Since we need two
7307 relocations for this use a "composite" reloc. */
7308 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7309 stub_rtype);
7310 irel->r_offset = trampoff + insn_offset;
7311 if (r_type == R_PPC_PLTREL24
7312 && stub_rtype != R_PPC_RELAX_PLTREL24)
7313 irel->r_addend = 0;
7314
7315 /* Record the fixup so we don't do it again this section. */
7316 f = bfd_malloc (sizeof (*f));
7317 f->next = branch_fixups;
7318 f->tsec = tsec;
7319 f->toff = toff;
7320 f->trampoff = trampoff;
7321 branch_fixups = f;
7322
7323 trampoff += size;
7324 changes++;
7325 }
7326 else
7327 {
7328 val = f->trampoff - roff;
7329 if (val >= max_branch_offset)
7330 continue;
7331
7332 /* Nop out the reloc, since we're finalizing things here. */
7333 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7334 }
7335
7336 /* Get the section contents. */
7337 if (contents == NULL)
7338 {
7339 /* Get cached copy if it exists. */
7340 if (elf_section_data (isec)->this_hdr.contents != NULL)
7341 contents = elf_section_data (isec)->this_hdr.contents;
7342 /* Go get them off disk. */
7343 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7344 goto error_return;
7345 }
7346
7347 /* Fix up the existing branch to hit the trampoline. */
7348 hit_addr = contents + roff;
7349 switch (r_type)
7350 {
7351 case R_PPC_REL24:
7352 case R_PPC_LOCAL24PC:
7353 case R_PPC_PLTREL24:
7354 t0 = bfd_get_32 (abfd, hit_addr);
7355 t0 &= ~0x3fffffc;
7356 t0 |= val & 0x3fffffc;
7357 bfd_put_32 (abfd, t0, hit_addr);
7358 break;
7359
7360 case R_PPC_REL14:
7361 case R_PPC_REL14_BRTAKEN:
7362 case R_PPC_REL14_BRNTAKEN:
7363 t0 = bfd_get_32 (abfd, hit_addr);
7364 t0 &= ~0xfffc;
7365 t0 |= val & 0xfffc;
7366 bfd_put_32 (abfd, t0, hit_addr);
7367 break;
7368 }
7369 }
7370
7371 while (branch_fixups != NULL)
7372 {
7373 struct one_branch_fixup *f = branch_fixups;
7374 branch_fixups = branch_fixups->next;
7375 free (f);
7376 }
7377 }
7378
7379 workaround_change = FALSE;
7380 newsize = trampoff;
7381 if (htab->params->ppc476_workaround
7382 && (!bfd_link_relocatable (link_info)
7383 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7384 {
7385 bfd_vma addr, end_addr;
7386 unsigned int crossings;
7387 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7388
7389 addr = isec->output_section->vma + isec->output_offset;
7390 end_addr = addr + trampoff;
7391 addr &= -pagesize;
7392 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7393 if (crossings != 0)
7394 {
7395 /* Keep space aligned, to ensure the patch code itself does
7396 not cross a page. Don't decrease size calculated on a
7397 previous pass as otherwise we might never settle on a layout. */
7398 newsize = 15 - ((end_addr - 1) & 15);
7399 newsize += crossings * 16;
7400 if (relax_info->workaround_size < newsize)
7401 {
7402 relax_info->workaround_size = newsize;
7403 workaround_change = TRUE;
7404 }
7405 /* Ensure relocate_section is called. */
7406 isec->flags |= SEC_RELOC;
7407 }
7408 newsize = trampoff + relax_info->workaround_size;
7409 }
7410
7411 if (htab->params->pic_fixup > 0)
7412 {
7413 picfixup_size -= relax_info->picfixup_size;
7414 if (picfixup_size != 0)
7415 relax_info->picfixup_size += picfixup_size;
7416 newsize += relax_info->picfixup_size;
7417 }
7418
7419 if (changes != 0 || picfixup_size != 0 || workaround_change)
7420 isec->size = newsize;
7421
7422 if (isymbuf != NULL
7423 && symtab_hdr->contents != (unsigned char *) isymbuf)
7424 {
7425 if (! link_info->keep_memory)
7426 free (isymbuf);
7427 else
7428 {
7429 /* Cache the symbols for elf_link_input_bfd. */
7430 symtab_hdr->contents = (unsigned char *) isymbuf;
7431 }
7432 }
7433
7434 if (contents != NULL
7435 && elf_section_data (isec)->this_hdr.contents != contents)
7436 {
7437 if (!changes && !link_info->keep_memory)
7438 free (contents);
7439 else
7440 {
7441 /* Cache the section contents for elf_link_input_bfd. */
7442 elf_section_data (isec)->this_hdr.contents = contents;
7443 }
7444 }
7445
7446 changes += picfixup_size;
7447 if (changes != 0)
7448 {
7449 /* Append sufficient NOP relocs so we can write out relocation
7450 information for the trampolines. */
7451 Elf_Internal_Shdr *rel_hdr;
7452 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7453 * sizeof (*new_relocs));
7454 unsigned ix;
7455
7456 if (!new_relocs)
7457 goto error_return;
7458 memcpy (new_relocs, internal_relocs,
7459 isec->reloc_count * sizeof (*new_relocs));
7460 for (ix = changes; ix--;)
7461 {
7462 irel = new_relocs + ix + isec->reloc_count;
7463
7464 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7465 }
7466 if (internal_relocs != elf_section_data (isec)->relocs)
7467 free (internal_relocs);
7468 elf_section_data (isec)->relocs = new_relocs;
7469 isec->reloc_count += changes;
7470 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7471 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7472 }
7473 else if (internal_relocs != NULL
7474 && elf_section_data (isec)->relocs != internal_relocs)
7475 free (internal_relocs);
7476
7477 *again = changes != 0 || workaround_change;
7478 return TRUE;
7479
7480 error_return:
7481 while (branch_fixups != NULL)
7482 {
7483 struct one_branch_fixup *f = branch_fixups;
7484 branch_fixups = branch_fixups->next;
7485 free (f);
7486 }
7487 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7488 free (isymbuf);
7489 if (contents != NULL
7490 && elf_section_data (isec)->this_hdr.contents != contents)
7491 free (contents);
7492 if (internal_relocs != NULL
7493 && elf_section_data (isec)->relocs != internal_relocs)
7494 free (internal_relocs);
7495 return FALSE;
7496 }
7497 \f
7498 /* What to do when ld finds relocations against symbols defined in
7499 discarded sections. */
7500
7501 static unsigned int
7502 ppc_elf_action_discarded (asection *sec)
7503 {
7504 if (strcmp (".fixup", sec->name) == 0)
7505 return 0;
7506
7507 if (strcmp (".got2", sec->name) == 0)
7508 return 0;
7509
7510 return _bfd_elf_default_action_discarded (sec);
7511 }
7512 \f
7513 /* Fill in the address for a pointer generated in a linker section. */
7514
7515 static bfd_vma
7516 elf_finish_pointer_linker_section (bfd *input_bfd,
7517 elf_linker_section_t *lsect,
7518 struct elf_link_hash_entry *h,
7519 bfd_vma relocation,
7520 const Elf_Internal_Rela *rel)
7521 {
7522 elf_linker_section_pointers_t *linker_section_ptr;
7523
7524 BFD_ASSERT (lsect != NULL);
7525
7526 if (h != NULL)
7527 {
7528 /* Handle global symbol. */
7529 struct ppc_elf_link_hash_entry *eh;
7530
7531 eh = (struct ppc_elf_link_hash_entry *) h;
7532 BFD_ASSERT (eh->elf.def_regular);
7533 linker_section_ptr = eh->linker_section_pointer;
7534 }
7535 else
7536 {
7537 /* Handle local symbol. */
7538 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7539
7540 BFD_ASSERT (is_ppc_elf (input_bfd));
7541 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7542 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7543 }
7544
7545 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7546 rel->r_addend,
7547 lsect);
7548 BFD_ASSERT (linker_section_ptr != NULL);
7549
7550 /* Offset will always be a multiple of four, so use the bottom bit
7551 as a "written" flag. */
7552 if ((linker_section_ptr->offset & 1) == 0)
7553 {
7554 bfd_put_32 (lsect->section->owner,
7555 relocation + linker_section_ptr->addend,
7556 lsect->section->contents + linker_section_ptr->offset);
7557 linker_section_ptr->offset += 1;
7558 }
7559
7560 relocation = (lsect->section->output_section->vma
7561 + lsect->section->output_offset
7562 + linker_section_ptr->offset - 1
7563 - SYM_VAL (lsect->sym));
7564
7565 #ifdef DEBUG
7566 fprintf (stderr,
7567 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7568 lsect->name, (long) relocation, (long) relocation);
7569 #endif
7570
7571 return relocation;
7572 }
7573
7574 #define PPC_LO(v) ((v) & 0xffff)
7575 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7576 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7577
7578 static void
7579 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7580 struct bfd_link_info *info)
7581 {
7582 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7583 bfd *output_bfd = info->output_bfd;
7584 bfd_vma plt;
7585
7586 plt = ((ent->plt.offset & ~1)
7587 + plt_sec->output_section->vma
7588 + plt_sec->output_offset);
7589
7590 if (bfd_link_pic (info))
7591 {
7592 bfd_vma got = 0;
7593
7594 if (ent->addend >= 32768)
7595 got = (ent->addend
7596 + ent->sec->output_section->vma
7597 + ent->sec->output_offset);
7598 else if (htab->elf.hgot != NULL)
7599 got = SYM_VAL (htab->elf.hgot);
7600
7601 plt -= got;
7602
7603 if (plt + 0x8000 < 0x10000)
7604 {
7605 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7606 p += 4;
7607 bfd_put_32 (output_bfd, MTCTR_11, p);
7608 p += 4;
7609 bfd_put_32 (output_bfd, BCTR, p);
7610 p += 4;
7611 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7612 p += 4;
7613 }
7614 else
7615 {
7616 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7617 p += 4;
7618 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7619 p += 4;
7620 bfd_put_32 (output_bfd, MTCTR_11, p);
7621 p += 4;
7622 bfd_put_32 (output_bfd, BCTR, p);
7623 p += 4;
7624 }
7625 }
7626 else
7627 {
7628 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7629 p += 4;
7630 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7631 p += 4;
7632 bfd_put_32 (output_bfd, MTCTR_11, p);
7633 p += 4;
7634 bfd_put_32 (output_bfd, BCTR, p);
7635 p += 4;
7636 }
7637 }
7638
7639 /* Return true if symbol is defined statically. */
7640
7641 static bfd_boolean
7642 is_static_defined (struct elf_link_hash_entry *h)
7643 {
7644 return ((h->root.type == bfd_link_hash_defined
7645 || h->root.type == bfd_link_hash_defweak)
7646 && h->root.u.def.section != NULL
7647 && h->root.u.def.section->output_section != NULL);
7648 }
7649
7650 /* If INSN is an opcode that may be used with an @tls operand, return
7651 the transformed insn for TLS optimisation, otherwise return 0. If
7652 REG is non-zero only match an insn with RB or RA equal to REG. */
7653
7654 unsigned int
7655 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7656 {
7657 unsigned int rtra;
7658
7659 if ((insn & (0x3f << 26)) != 31 << 26)
7660 return 0;
7661
7662 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7663 rtra = insn & ((1 << 26) - (1 << 16));
7664 else if (((insn >> 16) & 0x1f) == reg)
7665 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7666 else
7667 return 0;
7668
7669 if ((insn & (0x3ff << 1)) == 266 << 1)
7670 /* add -> addi. */
7671 insn = 14 << 26;
7672 else if ((insn & (0x1f << 1)) == 23 << 1
7673 && ((insn & (0x1f << 6)) < 14 << 6
7674 || ((insn & (0x1f << 6)) >= 16 << 6
7675 && (insn & (0x1f << 6)) < 24 << 6)))
7676 /* load and store indexed -> dform. */
7677 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7678 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7679 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7680 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7681 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7682 /* lwax -> lwa. */
7683 insn = (58 << 26) | 2;
7684 else
7685 return 0;
7686 insn |= rtra;
7687 return insn;
7688 }
7689
7690 /* If INSN is an opcode that may be used with an @tprel operand, return
7691 the transformed insn for an undefined weak symbol, ie. with the
7692 thread pointer REG operand removed. Otherwise return 0. */
7693
7694 unsigned int
7695 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7696 {
7697 if ((insn & (0x1f << 16)) == reg << 16
7698 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7699 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7700 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7701 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7702 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7703 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7704 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7705 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7706 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7707 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7708 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7709 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7710 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7711 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7712 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7713 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7714 && (insn & 3) != 1)
7715 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7716 && ((insn & 3) == 0 || (insn & 3) == 3))))
7717 {
7718 insn &= ~(0x1f << 16);
7719 }
7720 else if ((insn & (0x1f << 21)) == reg << 21
7721 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7722 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7723 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7724 {
7725 insn &= ~(0x1f << 21);
7726 insn |= (insn & (0x1f << 16)) << 5;
7727 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7728 insn -= 2 >> 26; /* convert to ori,oris */
7729 }
7730 else
7731 insn = 0;
7732 return insn;
7733 }
7734
7735 static bfd_boolean
7736 is_insn_ds_form (unsigned int insn)
7737 {
7738 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7739 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7740 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7741 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7742 }
7743
7744 static bfd_boolean
7745 is_insn_dq_form (unsigned int insn)
7746 {
7747 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7748 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7749 && (insn & 3) == 1));
7750 }
7751
7752 /* The RELOCATE_SECTION function is called by the ELF backend linker
7753 to handle the relocations for a section.
7754
7755 The relocs are always passed as Rela structures; if the section
7756 actually uses Rel structures, the r_addend field will always be
7757 zero.
7758
7759 This function is responsible for adjust the section contents as
7760 necessary, and (if using Rela relocs and generating a
7761 relocatable output file) adjusting the reloc addend as
7762 necessary.
7763
7764 This function does not have to worry about setting the reloc
7765 address or the reloc symbol index.
7766
7767 LOCAL_SYMS is a pointer to the swapped in local symbols.
7768
7769 LOCAL_SECTIONS is an array giving the section in the input file
7770 corresponding to the st_shndx field of each local symbol.
7771
7772 The global hash table entry for the global symbols can be found
7773 via elf_sym_hashes (input_bfd).
7774
7775 When generating relocatable output, this function must handle
7776 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7777 going to be the section symbol corresponding to the output
7778 section, which means that the addend must be adjusted
7779 accordingly. */
7780
7781 static bfd_boolean
7782 ppc_elf_relocate_section (bfd *output_bfd,
7783 struct bfd_link_info *info,
7784 bfd *input_bfd,
7785 asection *input_section,
7786 bfd_byte *contents,
7787 Elf_Internal_Rela *relocs,
7788 Elf_Internal_Sym *local_syms,
7789 asection **local_sections)
7790 {
7791 Elf_Internal_Shdr *symtab_hdr;
7792 struct elf_link_hash_entry **sym_hashes;
7793 struct ppc_elf_link_hash_table *htab;
7794 Elf_Internal_Rela *rel;
7795 Elf_Internal_Rela *wrel;
7796 Elf_Internal_Rela *relend;
7797 Elf_Internal_Rela outrel;
7798 asection *got2;
7799 bfd_vma *local_got_offsets;
7800 bfd_boolean ret = TRUE;
7801 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7802 bfd_boolean is_vxworks_tls;
7803 unsigned int picfixup_size = 0;
7804 struct ppc_elf_relax_info *relax_info = NULL;
7805
7806 #ifdef DEBUG
7807 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7808 "%ld relocations%s",
7809 input_bfd, input_section,
7810 (long) input_section->reloc_count,
7811 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7812 #endif
7813
7814 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7815
7816 /* Initialize howto table if not already done. */
7817 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7818 ppc_elf_howto_init ();
7819
7820 htab = ppc_elf_hash_table (info);
7821 local_got_offsets = elf_local_got_offsets (input_bfd);
7822 symtab_hdr = &elf_symtab_hdr (input_bfd);
7823 sym_hashes = elf_sym_hashes (input_bfd);
7824 /* We have to handle relocations in vxworks .tls_vars sections
7825 specially, because the dynamic loader is 'weird'. */
7826 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7827 && !strcmp (input_section->output_section->name,
7828 ".tls_vars"));
7829 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7830 relax_info = elf_section_data (input_section)->sec_info;
7831 rel = wrel = relocs;
7832 relend = relocs + input_section->reloc_count;
7833 for (; rel < relend; wrel++, rel++)
7834 {
7835 enum elf_ppc_reloc_type r_type;
7836 bfd_vma addend;
7837 bfd_reloc_status_type r;
7838 Elf_Internal_Sym *sym;
7839 asection *sec;
7840 struct elf_link_hash_entry *h;
7841 const char *sym_name;
7842 reloc_howto_type *howto;
7843 unsigned long r_symndx;
7844 bfd_vma relocation;
7845 bfd_vma branch_bit, from;
7846 bfd_boolean unresolved_reloc;
7847 bfd_boolean warned;
7848 unsigned int tls_type, tls_mask, tls_gd;
7849 struct plt_entry **ifunc;
7850 struct reloc_howto_struct alt_howto;
7851
7852 again:
7853 r_type = ELF32_R_TYPE (rel->r_info);
7854 sym = NULL;
7855 sec = NULL;
7856 h = NULL;
7857 unresolved_reloc = FALSE;
7858 warned = FALSE;
7859 r_symndx = ELF32_R_SYM (rel->r_info);
7860
7861 if (r_symndx < symtab_hdr->sh_info)
7862 {
7863 sym = local_syms + r_symndx;
7864 sec = local_sections[r_symndx];
7865 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7866
7867 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7868 }
7869 else
7870 {
7871 bfd_boolean ignored;
7872
7873 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7874 r_symndx, symtab_hdr, sym_hashes,
7875 h, sec, relocation,
7876 unresolved_reloc, warned, ignored);
7877
7878 sym_name = h->root.root.string;
7879 }
7880
7881 if (sec != NULL && discarded_section (sec))
7882 {
7883 /* For relocs against symbols from removed linkonce sections,
7884 or sections discarded by a linker script, we just want the
7885 section contents zeroed. Avoid any special processing. */
7886 howto = NULL;
7887 if (r_type < R_PPC_max)
7888 howto = ppc_elf_howto_table[r_type];
7889
7890 _bfd_clear_contents (howto, input_bfd, input_section,
7891 contents + rel->r_offset);
7892 wrel->r_offset = rel->r_offset;
7893 wrel->r_info = 0;
7894 wrel->r_addend = 0;
7895
7896 /* For ld -r, remove relocations in debug sections against
7897 symbols defined in discarded sections. Not done for
7898 non-debug to preserve relocs in .eh_frame which the
7899 eh_frame editing code expects to be present. */
7900 if (bfd_link_relocatable (info)
7901 && (input_section->flags & SEC_DEBUGGING))
7902 wrel--;
7903
7904 continue;
7905 }
7906
7907 if (bfd_link_relocatable (info))
7908 {
7909 if (got2 != NULL
7910 && r_type == R_PPC_PLTREL24
7911 && rel->r_addend != 0)
7912 {
7913 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7914 addend specifies the GOT pointer offset within .got2. */
7915 rel->r_addend += got2->output_offset;
7916 }
7917 if (r_type != R_PPC_RELAX_PLT
7918 && r_type != R_PPC_RELAX_PLTREL24
7919 && r_type != R_PPC_RELAX)
7920 goto copy_reloc;
7921 }
7922
7923 /* TLS optimizations. Replace instruction sequences and relocs
7924 based on information we collected in tls_optimize. We edit
7925 RELOCS so that --emit-relocs will output something sensible
7926 for the final instruction stream. */
7927 tls_mask = 0;
7928 tls_gd = 0;
7929 if (h != NULL)
7930 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7931 else if (local_got_offsets != NULL)
7932 {
7933 struct plt_entry **local_plt;
7934 char *lgot_masks;
7935 local_plt
7936 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7937 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7938 tls_mask = lgot_masks[r_symndx];
7939 }
7940
7941 /* Ensure reloc mapping code below stays sane. */
7942 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7943 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7944 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7945 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7946 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7947 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7948 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7949 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7950 abort ();
7951 switch (r_type)
7952 {
7953 default:
7954 break;
7955
7956 case R_PPC_GOT_TPREL16:
7957 case R_PPC_GOT_TPREL16_LO:
7958 if ((tls_mask & TLS_TLS) != 0
7959 && (tls_mask & TLS_TPREL) == 0)
7960 {
7961 bfd_vma insn;
7962
7963 insn = bfd_get_32 (input_bfd,
7964 contents + rel->r_offset - d_offset);
7965 insn &= 31 << 21;
7966 insn |= 0x3c020000; /* addis 0,2,0 */
7967 bfd_put_32 (input_bfd, insn,
7968 contents + rel->r_offset - d_offset);
7969 r_type = R_PPC_TPREL16_HA;
7970 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7971 }
7972 break;
7973
7974 case R_PPC_TLS:
7975 if ((tls_mask & TLS_TLS) != 0
7976 && (tls_mask & TLS_TPREL) == 0)
7977 {
7978 bfd_vma insn;
7979
7980 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7981 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7982 if (insn == 0)
7983 abort ();
7984 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7985 r_type = R_PPC_TPREL16_LO;
7986 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7987
7988 /* Was PPC_TLS which sits on insn boundary, now
7989 PPC_TPREL16_LO which is at low-order half-word. */
7990 rel->r_offset += d_offset;
7991 }
7992 break;
7993
7994 case R_PPC_GOT_TLSGD16_HI:
7995 case R_PPC_GOT_TLSGD16_HA:
7996 tls_gd = TLS_TPRELGD;
7997 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7998 goto tls_gdld_hi;
7999 break;
8000
8001 case R_PPC_GOT_TLSLD16_HI:
8002 case R_PPC_GOT_TLSLD16_HA:
8003 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8004 {
8005 tls_gdld_hi:
8006 if ((tls_mask & tls_gd) != 0)
8007 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8008 + R_PPC_GOT_TPREL16);
8009 else
8010 {
8011 rel->r_offset -= d_offset;
8012 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8013 r_type = R_PPC_NONE;
8014 }
8015 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8016 }
8017 break;
8018
8019 case R_PPC_GOT_TLSGD16:
8020 case R_PPC_GOT_TLSGD16_LO:
8021 tls_gd = TLS_TPRELGD;
8022 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8023 goto tls_ldgd_opt;
8024 break;
8025
8026 case R_PPC_GOT_TLSLD16:
8027 case R_PPC_GOT_TLSLD16_LO:
8028 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8029 {
8030 unsigned int insn1, insn2;
8031 bfd_vma offset;
8032
8033 tls_ldgd_opt:
8034 offset = (bfd_vma) -1;
8035 /* If not using the newer R_PPC_TLSGD/LD to mark
8036 __tls_get_addr calls, we must trust that the call
8037 stays with its arg setup insns, ie. that the next
8038 reloc is the __tls_get_addr call associated with
8039 the current reloc. Edit both insns. */
8040 if (input_section->has_tls_get_addr_call
8041 && rel + 1 < relend
8042 && branch_reloc_hash_match (input_bfd, rel + 1,
8043 htab->tls_get_addr))
8044 offset = rel[1].r_offset;
8045 /* We read the low GOT_TLS insn because we need to keep
8046 the destination reg. It may be something other than
8047 the usual r3, and moved to r3 before the call by
8048 intervening code. */
8049 insn1 = bfd_get_32 (input_bfd,
8050 contents + rel->r_offset - d_offset);
8051 if ((tls_mask & tls_gd) != 0)
8052 {
8053 /* IE */
8054 insn1 &= (0x1f << 21) | (0x1f << 16);
8055 insn1 |= 32 << 26; /* lwz */
8056 if (offset != (bfd_vma) -1)
8057 {
8058 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8059 insn2 = 0x7c631214; /* add 3,3,2 */
8060 bfd_put_32 (input_bfd, insn2, contents + offset);
8061 }
8062 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8063 + R_PPC_GOT_TPREL16);
8064 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8065 }
8066 else
8067 {
8068 /* LE */
8069 insn1 &= 0x1f << 21;
8070 insn1 |= 0x3c020000; /* addis r,2,0 */
8071 if (tls_gd == 0)
8072 {
8073 /* Was an LD reloc. */
8074 for (r_symndx = 0;
8075 r_symndx < symtab_hdr->sh_info;
8076 r_symndx++)
8077 if (local_sections[r_symndx] == sec)
8078 break;
8079 if (r_symndx >= symtab_hdr->sh_info)
8080 r_symndx = STN_UNDEF;
8081 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8082 if (r_symndx != STN_UNDEF)
8083 rel->r_addend -= (local_syms[r_symndx].st_value
8084 + sec->output_offset
8085 + sec->output_section->vma);
8086 }
8087 r_type = R_PPC_TPREL16_HA;
8088 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8089 if (offset != (bfd_vma) -1)
8090 {
8091 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8092 rel[1].r_offset = offset + d_offset;
8093 rel[1].r_addend = rel->r_addend;
8094 insn2 = 0x38630000; /* addi 3,3,0 */
8095 bfd_put_32 (input_bfd, insn2, contents + offset);
8096 }
8097 }
8098 bfd_put_32 (input_bfd, insn1,
8099 contents + rel->r_offset - d_offset);
8100 if (tls_gd == 0)
8101 {
8102 /* We changed the symbol on an LD reloc. Start over
8103 in order to get h, sym, sec etc. right. */
8104 goto again;
8105 }
8106 }
8107 break;
8108
8109 case R_PPC_TLSGD:
8110 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8111 {
8112 unsigned int insn2;
8113 bfd_vma offset = rel->r_offset;
8114
8115 if ((tls_mask & TLS_TPRELGD) != 0)
8116 {
8117 /* IE */
8118 r_type = R_PPC_NONE;
8119 insn2 = 0x7c631214; /* add 3,3,2 */
8120 }
8121 else
8122 {
8123 /* LE */
8124 r_type = R_PPC_TPREL16_LO;
8125 rel->r_offset += d_offset;
8126 insn2 = 0x38630000; /* addi 3,3,0 */
8127 }
8128 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8129 bfd_put_32 (input_bfd, insn2, contents + offset);
8130 /* Zap the reloc on the _tls_get_addr call too. */
8131 BFD_ASSERT (offset == rel[1].r_offset);
8132 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8133 }
8134 break;
8135
8136 case R_PPC_TLSLD:
8137 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8138 {
8139 unsigned int insn2;
8140
8141 for (r_symndx = 0;
8142 r_symndx < symtab_hdr->sh_info;
8143 r_symndx++)
8144 if (local_sections[r_symndx] == sec)
8145 break;
8146 if (r_symndx >= symtab_hdr->sh_info)
8147 r_symndx = STN_UNDEF;
8148 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8149 if (r_symndx != STN_UNDEF)
8150 rel->r_addend -= (local_syms[r_symndx].st_value
8151 + sec->output_offset
8152 + sec->output_section->vma);
8153
8154 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8155 rel->r_offset += d_offset;
8156 insn2 = 0x38630000; /* addi 3,3,0 */
8157 bfd_put_32 (input_bfd, insn2,
8158 contents + rel->r_offset - d_offset);
8159 /* Zap the reloc on the _tls_get_addr call too. */
8160 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8161 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8162 goto again;
8163 }
8164 break;
8165 }
8166
8167 /* Handle other relocations that tweak non-addend part of insn. */
8168 branch_bit = 0;
8169 switch (r_type)
8170 {
8171 default:
8172 break;
8173
8174 /* Branch taken prediction relocations. */
8175 case R_PPC_ADDR14_BRTAKEN:
8176 case R_PPC_REL14_BRTAKEN:
8177 branch_bit = BRANCH_PREDICT_BIT;
8178 /* Fall through. */
8179
8180 /* Branch not taken prediction relocations. */
8181 case R_PPC_ADDR14_BRNTAKEN:
8182 case R_PPC_REL14_BRNTAKEN:
8183 {
8184 bfd_vma insn;
8185
8186 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8187 insn &= ~BRANCH_PREDICT_BIT;
8188 insn |= branch_bit;
8189
8190 from = (rel->r_offset
8191 + input_section->output_offset
8192 + input_section->output_section->vma);
8193
8194 /* Invert 'y' bit if not the default. */
8195 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8196 insn ^= BRANCH_PREDICT_BIT;
8197
8198 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8199 break;
8200 }
8201 }
8202
8203 if (ELIMINATE_COPY_RELOCS
8204 && h != NULL
8205 && !h->def_regular
8206 && h->protected_def
8207 && ppc_elf_hash_entry (h)->has_addr16_ha
8208 && ppc_elf_hash_entry (h)->has_addr16_lo
8209 && htab->params->pic_fixup > 0)
8210 {
8211 /* Convert lis;addi or lis;load/store accessing a protected
8212 variable defined in a shared library to PIC. */
8213 unsigned int insn;
8214
8215 if (r_type == R_PPC_ADDR16_HA)
8216 {
8217 insn = bfd_get_32 (input_bfd,
8218 contents + rel->r_offset - d_offset);
8219 if ((insn & (0x3f << 26)) == (15u << 26)
8220 && (insn & (0x1f << 16)) == 0 /* lis */)
8221 {
8222 bfd_byte *p;
8223 bfd_vma off;
8224 bfd_vma got_addr;
8225
8226 p = (contents + input_section->size
8227 - relax_info->workaround_size
8228 - relax_info->picfixup_size
8229 + picfixup_size);
8230 off = (p - contents) - (rel->r_offset - d_offset);
8231 if (off > 0x1fffffc || (off & 3) != 0)
8232 info->callbacks->einfo
8233 (_("%H: fixup branch overflow\n"),
8234 input_bfd, input_section, rel->r_offset);
8235
8236 bfd_put_32 (input_bfd, B | off,
8237 contents + rel->r_offset - d_offset);
8238 got_addr = (htab->elf.sgot->output_section->vma
8239 + htab->elf.sgot->output_offset
8240 + (h->got.offset & ~1));
8241 wrel->r_offset = (p - contents) + d_offset;
8242 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8243 wrel->r_addend = got_addr;
8244 insn &= ~0xffff;
8245 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8246 bfd_put_32 (input_bfd, insn, p);
8247
8248 /* Convert lis to lwz, loading address from GOT. */
8249 insn &= ~0xffff;
8250 insn ^= (32u ^ 15u) << 26;
8251 insn |= (insn & (0x1f << 21)) >> 5;
8252 insn |= got_addr & 0xffff;
8253 bfd_put_32 (input_bfd, insn, p + 4);
8254
8255 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8256 picfixup_size += 12;
8257
8258 /* Use one of the spare relocs, so --emit-relocs
8259 output is reasonable. */
8260 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8261 wrel++, rel++;
8262 rel->r_offset = wrel[-1].r_offset + 4;
8263 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8264 rel->r_addend = wrel[-1].r_addend;
8265
8266 /* Continue on as if we had a got reloc, to output
8267 dynamic reloc. */
8268 r_type = R_PPC_GOT16_LO;
8269 }
8270 else
8271 _bfd_error_handler
8272 /* xgettext:c-format */
8273 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8274 input_bfd, input_section, rel->r_offset,
8275 "R_PPC_ADDR16_HA", insn);
8276 }
8277 else if (r_type == R_PPC_ADDR16_LO)
8278 {
8279 insn = bfd_get_32 (input_bfd,
8280 contents + rel->r_offset - d_offset);
8281 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8282 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8283 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8284 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8285 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8286 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8287 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8288 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8289 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8290 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8291 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8292 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8293 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8294 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8295 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8296 && (insn & 3) != 1)
8297 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8298 && ((insn & 3) == 0 || (insn & 3) == 3)))
8299 {
8300 /* Arrange to apply the reloc addend, if any. */
8301 relocation = 0;
8302 unresolved_reloc = FALSE;
8303 rel->r_info = ELF32_R_INFO (0, r_type);
8304 }
8305 else
8306 _bfd_error_handler
8307 /* xgettext:c-format */
8308 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8309 input_bfd, input_section, rel->r_offset,
8310 "R_PPC_ADDR16_LO", insn);
8311 }
8312 }
8313
8314 ifunc = NULL;
8315 if (!htab->is_vxworks)
8316 {
8317 struct plt_entry *ent;
8318
8319 if (h != NULL)
8320 {
8321 if (h->type == STT_GNU_IFUNC)
8322 ifunc = &h->plt.plist;
8323 }
8324 else if (local_got_offsets != NULL
8325 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8326 {
8327 struct plt_entry **local_plt;
8328
8329 local_plt = (struct plt_entry **) (local_got_offsets
8330 + symtab_hdr->sh_info);
8331 ifunc = local_plt + r_symndx;
8332 }
8333
8334 ent = NULL;
8335 if (ifunc != NULL
8336 && (!bfd_link_pic (info)
8337 || is_branch_reloc (r_type)))
8338 {
8339 addend = 0;
8340 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8341 addend = rel->r_addend;
8342 ent = find_plt_ent (ifunc, got2, addend);
8343 }
8344 if (ent != NULL)
8345 {
8346 if (bfd_link_pic (info)
8347 && ent->sec != got2
8348 && htab->plt_type != PLT_NEW
8349 && (!htab->elf.dynamic_sections_created
8350 || h == NULL
8351 || h->dynindx == -1))
8352 {
8353 /* Uh oh, we are going to create a pic glink stub
8354 for an ifunc (here for h == NULL and later in
8355 finish_dynamic_symbol for h != NULL), and
8356 apparently are using code compiled with
8357 -mbss-plt. The difficulty is that -mbss-plt code
8358 gives no indication via a magic PLTREL24 addend
8359 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8360 is pointing into a .got2 section (and how far
8361 into .got2). */
8362 info->callbacks->einfo
8363 /* xgettext:c-format */
8364 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8365 input_bfd, input_section, rel->r_offset, sym_name);
8366 }
8367 if (h == NULL && (ent->plt.offset & 1) == 0)
8368 {
8369 Elf_Internal_Rela rela;
8370 bfd_byte *loc;
8371
8372 rela.r_offset = (htab->elf.iplt->output_section->vma
8373 + htab->elf.iplt->output_offset
8374 + ent->plt.offset);
8375 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8376 rela.r_addend = relocation;
8377 loc = htab->elf.irelplt->contents;
8378 loc += (htab->elf.irelplt->reloc_count++
8379 * sizeof (Elf32_External_Rela));
8380 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8381 htab->local_ifunc_resolver = 1;
8382
8383 ent->plt.offset |= 1;
8384 }
8385 if (h == NULL && (ent->glink_offset & 1) == 0)
8386 {
8387 unsigned char *p = ((unsigned char *) htab->glink->contents
8388 + ent->glink_offset);
8389 write_glink_stub (ent, htab->elf.iplt, p, info);
8390 ent->glink_offset |= 1;
8391 }
8392
8393 unresolved_reloc = FALSE;
8394 if (htab->plt_type == PLT_NEW
8395 || !htab->elf.dynamic_sections_created
8396 || h == NULL
8397 || h->dynindx == -1)
8398 relocation = (htab->glink->output_section->vma
8399 + htab->glink->output_offset
8400 + (ent->glink_offset & ~1));
8401 else
8402 relocation = (htab->elf.splt->output_section->vma
8403 + htab->elf.splt->output_offset
8404 + ent->plt.offset);
8405 }
8406 }
8407
8408 addend = rel->r_addend;
8409 howto = NULL;
8410 if (r_type < R_PPC_max)
8411 howto = ppc_elf_howto_table[r_type];
8412
8413 switch (r_type)
8414 {
8415 default:
8416 break;
8417
8418 case R_PPC_TPREL16_HA:
8419 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8420 {
8421 bfd_byte *p = contents + (rel->r_offset & ~3);
8422 unsigned int insn = bfd_get_32 (input_bfd, p);
8423 if ((insn & ((0x3f << 26) | 0x1f << 16))
8424 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8425 /* xgettext:c-format */
8426 info->callbacks->minfo
8427 (_("%H: warning: %s unexpected insn %#x.\n"),
8428 input_bfd, input_section, rel->r_offset, howto->name, insn);
8429 else
8430 bfd_put_32 (input_bfd, NOP, p);
8431 }
8432 break;
8433
8434 case R_PPC_TPREL16_LO:
8435 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8436 {
8437 bfd_byte *p = contents + (rel->r_offset & ~3);
8438 unsigned int insn = bfd_get_32 (input_bfd, p);
8439 insn &= ~(0x1f << 16);
8440 insn |= 2 << 16;
8441 bfd_put_32 (input_bfd, insn, p);
8442 }
8443 break;
8444 }
8445
8446 tls_type = 0;
8447 switch (r_type)
8448 {
8449 default:
8450 info->callbacks->einfo
8451 /* xgettext:c-format */
8452 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8453 input_bfd, (int) r_type, sym_name);
8454
8455 bfd_set_error (bfd_error_bad_value);
8456 ret = FALSE;
8457 goto copy_reloc;
8458
8459 case R_PPC_NONE:
8460 case R_PPC_TLS:
8461 case R_PPC_TLSGD:
8462 case R_PPC_TLSLD:
8463 case R_PPC_EMB_MRKREF:
8464 case R_PPC_GNU_VTINHERIT:
8465 case R_PPC_GNU_VTENTRY:
8466 goto copy_reloc;
8467
8468 /* GOT16 relocations. Like an ADDR16 using the symbol's
8469 address in the GOT as relocation value instead of the
8470 symbol's value itself. Also, create a GOT entry for the
8471 symbol and put the symbol value there. */
8472 case R_PPC_GOT_TLSGD16:
8473 case R_PPC_GOT_TLSGD16_LO:
8474 case R_PPC_GOT_TLSGD16_HI:
8475 case R_PPC_GOT_TLSGD16_HA:
8476 tls_type = TLS_TLS | TLS_GD;
8477 goto dogot;
8478
8479 case R_PPC_GOT_TLSLD16:
8480 case R_PPC_GOT_TLSLD16_LO:
8481 case R_PPC_GOT_TLSLD16_HI:
8482 case R_PPC_GOT_TLSLD16_HA:
8483 tls_type = TLS_TLS | TLS_LD;
8484 goto dogot;
8485
8486 case R_PPC_GOT_TPREL16:
8487 case R_PPC_GOT_TPREL16_LO:
8488 case R_PPC_GOT_TPREL16_HI:
8489 case R_PPC_GOT_TPREL16_HA:
8490 tls_type = TLS_TLS | TLS_TPREL;
8491 goto dogot;
8492
8493 case R_PPC_GOT_DTPREL16:
8494 case R_PPC_GOT_DTPREL16_LO:
8495 case R_PPC_GOT_DTPREL16_HI:
8496 case R_PPC_GOT_DTPREL16_HA:
8497 tls_type = TLS_TLS | TLS_DTPREL;
8498 goto dogot;
8499
8500 case R_PPC_GOT16:
8501 case R_PPC_GOT16_LO:
8502 case R_PPC_GOT16_HI:
8503 case R_PPC_GOT16_HA:
8504 tls_mask = 0;
8505 dogot:
8506 {
8507 /* Relocation is to the entry for this symbol in the global
8508 offset table. */
8509 bfd_vma off;
8510 bfd_vma *offp;
8511 unsigned long indx;
8512
8513 if (htab->elf.sgot == NULL)
8514 abort ();
8515
8516 indx = 0;
8517 if (tls_type == (TLS_TLS | TLS_LD)
8518 && (h == NULL
8519 || !h->def_dynamic))
8520 offp = &htab->tlsld_got.offset;
8521 else if (h != NULL)
8522 {
8523 if (!htab->elf.dynamic_sections_created
8524 || h->dynindx == -1
8525 || SYMBOL_REFERENCES_LOCAL (info, h)
8526 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8527 /* This is actually a static link, or it is a
8528 -Bsymbolic link and the symbol is defined
8529 locally, or the symbol was forced to be local
8530 because of a version file. */
8531 ;
8532 else
8533 {
8534 indx = h->dynindx;
8535 unresolved_reloc = FALSE;
8536 }
8537 offp = &h->got.offset;
8538 }
8539 else
8540 {
8541 if (local_got_offsets == NULL)
8542 abort ();
8543 offp = &local_got_offsets[r_symndx];
8544 }
8545
8546 /* The offset must always be a multiple of 4. We use the
8547 least significant bit to record whether we have already
8548 processed this entry. */
8549 off = *offp;
8550 if ((off & 1) != 0)
8551 off &= ~1;
8552 else
8553 {
8554 unsigned int tls_m = (tls_mask
8555 & (TLS_LD | TLS_GD | TLS_DTPREL
8556 | TLS_TPREL | TLS_TPRELGD));
8557
8558 if (offp == &htab->tlsld_got.offset)
8559 tls_m = TLS_LD;
8560 else if (h == NULL
8561 || !h->def_dynamic)
8562 tls_m &= ~TLS_LD;
8563
8564 /* We might have multiple got entries for this sym.
8565 Initialize them all. */
8566 do
8567 {
8568 int tls_ty = 0;
8569
8570 if ((tls_m & TLS_LD) != 0)
8571 {
8572 tls_ty = TLS_TLS | TLS_LD;
8573 tls_m &= ~TLS_LD;
8574 }
8575 else if ((tls_m & TLS_GD) != 0)
8576 {
8577 tls_ty = TLS_TLS | TLS_GD;
8578 tls_m &= ~TLS_GD;
8579 }
8580 else if ((tls_m & TLS_DTPREL) != 0)
8581 {
8582 tls_ty = TLS_TLS | TLS_DTPREL;
8583 tls_m &= ~TLS_DTPREL;
8584 }
8585 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8586 {
8587 tls_ty = TLS_TLS | TLS_TPREL;
8588 tls_m = 0;
8589 }
8590
8591 /* Generate relocs for the dynamic linker. */
8592 if (indx != 0
8593 || (bfd_link_pic (info)
8594 && (h == NULL
8595 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8596 || offp == &htab->tlsld_got.offset)))
8597 {
8598 asection *rsec = htab->elf.srelgot;
8599 bfd_byte * loc;
8600
8601 if (ifunc != NULL)
8602 {
8603 rsec = htab->elf.irelplt;
8604 if (indx == 0)
8605 htab->local_ifunc_resolver = 1;
8606 else if (is_static_defined (h))
8607 htab->maybe_local_ifunc_resolver = 1;
8608 }
8609 outrel.r_offset = (htab->elf.sgot->output_section->vma
8610 + htab->elf.sgot->output_offset
8611 + off);
8612 outrel.r_addend = 0;
8613 if (tls_ty & (TLS_LD | TLS_GD))
8614 {
8615 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8616 if (tls_ty == (TLS_TLS | TLS_GD))
8617 {
8618 loc = rsec->contents;
8619 loc += (rsec->reloc_count++
8620 * sizeof (Elf32_External_Rela));
8621 bfd_elf32_swap_reloca_out (output_bfd,
8622 &outrel, loc);
8623 outrel.r_offset += 4;
8624 outrel.r_info
8625 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8626 }
8627 }
8628 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8629 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8630 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8631 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8632 else if (indx != 0)
8633 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8634 else if (ifunc != NULL)
8635 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8636 else
8637 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8638 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8639 {
8640 outrel.r_addend += relocation;
8641 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8642 {
8643 if (htab->elf.tls_sec == NULL)
8644 outrel.r_addend = 0;
8645 else
8646 outrel.r_addend -= htab->elf.tls_sec->vma;
8647 }
8648 }
8649 loc = rsec->contents;
8650 loc += (rsec->reloc_count++
8651 * sizeof (Elf32_External_Rela));
8652 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8653 }
8654
8655 /* Init the .got section contents if we're not
8656 emitting a reloc. */
8657 else
8658 {
8659 bfd_vma value = relocation;
8660
8661 if (tls_ty != 0)
8662 {
8663 if (htab->elf.tls_sec == NULL)
8664 value = 0;
8665 else
8666 {
8667 if (tls_ty & TLS_LD)
8668 value = 0;
8669 else
8670 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8671 if (tls_ty & TLS_TPREL)
8672 value += DTP_OFFSET - TP_OFFSET;
8673 }
8674
8675 if (tls_ty & (TLS_LD | TLS_GD))
8676 {
8677 bfd_put_32 (input_bfd, value,
8678 htab->elf.sgot->contents + off + 4);
8679 value = 1;
8680 }
8681 }
8682 bfd_put_32 (input_bfd, value,
8683 htab->elf.sgot->contents + off);
8684 }
8685
8686 off += 4;
8687 if (tls_ty & (TLS_LD | TLS_GD))
8688 off += 4;
8689 }
8690 while (tls_m != 0);
8691
8692 off = *offp;
8693 *offp = off | 1;
8694 }
8695
8696 if (off >= (bfd_vma) -2)
8697 abort ();
8698
8699 if ((tls_type & TLS_TLS) != 0)
8700 {
8701 if (tls_type != (TLS_TLS | TLS_LD))
8702 {
8703 if ((tls_mask & TLS_LD) != 0
8704 && !(h == NULL
8705 || !h->def_dynamic))
8706 off += 8;
8707 if (tls_type != (TLS_TLS | TLS_GD))
8708 {
8709 if ((tls_mask & TLS_GD) != 0)
8710 off += 8;
8711 if (tls_type != (TLS_TLS | TLS_DTPREL))
8712 {
8713 if ((tls_mask & TLS_DTPREL) != 0)
8714 off += 4;
8715 }
8716 }
8717 }
8718 }
8719
8720 /* If here for a picfixup, we're done. */
8721 if (r_type != ELF32_R_TYPE (rel->r_info))
8722 goto copy_reloc;
8723
8724 relocation = (htab->elf.sgot->output_section->vma
8725 + htab->elf.sgot->output_offset
8726 + off
8727 - SYM_VAL (htab->elf.hgot));
8728
8729 /* Addends on got relocations don't make much sense.
8730 x+off@got is actually x@got+off, and since the got is
8731 generated by a hash table traversal, the value in the
8732 got at entry m+n bears little relation to the entry m. */
8733 if (addend != 0)
8734 info->callbacks->einfo
8735 /* xgettext:c-format */
8736 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8737 input_bfd, input_section, rel->r_offset,
8738 howto->name,
8739 sym_name);
8740 }
8741 break;
8742
8743 /* Relocations that need no special processing. */
8744 case R_PPC_LOCAL24PC:
8745 /* It makes no sense to point a local relocation
8746 at a symbol not in this object. */
8747 if (unresolved_reloc)
8748 {
8749 (*info->callbacks->undefined_symbol) (info,
8750 h->root.root.string,
8751 input_bfd,
8752 input_section,
8753 rel->r_offset,
8754 TRUE);
8755 goto copy_reloc;
8756 }
8757 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8758 {
8759 /* @local on an ifunc does not really make sense since
8760 the ifunc resolver can take you anywhere. More
8761 seriously, calls to ifuncs must go through a plt call
8762 stub, and for pic the plt call stubs uses r30 to
8763 access the PLT. The problem is that a call that is
8764 local won't have the +32k reloc addend trick marking
8765 -fPIC code, so the linker won't know whether r30 is
8766 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8767 /* xgettext:c-format */
8768 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8769 input_bfd, input_section, rel->r_offset,
8770 h->root.root.string);
8771 }
8772 break;
8773
8774 case R_PPC_DTPREL16:
8775 case R_PPC_DTPREL16_LO:
8776 case R_PPC_DTPREL16_HI:
8777 case R_PPC_DTPREL16_HA:
8778 if (htab->elf.tls_sec != NULL)
8779 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8780 break;
8781
8782 /* Relocations that may need to be propagated if this is a shared
8783 object. */
8784 case R_PPC_TPREL16:
8785 case R_PPC_TPREL16_LO:
8786 case R_PPC_TPREL16_HI:
8787 case R_PPC_TPREL16_HA:
8788 if (h != NULL
8789 && h->root.type == bfd_link_hash_undefweak
8790 && h->dynindx == -1)
8791 {
8792 /* Make this relocation against an undefined weak symbol
8793 resolve to zero. This is really just a tweak, since
8794 code using weak externs ought to check that they are
8795 defined before using them. */
8796 bfd_byte *p = contents + rel->r_offset - d_offset;
8797 unsigned int insn = bfd_get_32 (input_bfd, p);
8798 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8799 if (insn != 0)
8800 bfd_put_32 (input_bfd, insn, p);
8801 break;
8802 }
8803 if (htab->elf.tls_sec != NULL)
8804 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8805 /* The TPREL16 relocs shouldn't really be used in shared
8806 libs or with non-local symbols as that will result in
8807 DT_TEXTREL being set, but support them anyway. */
8808 goto dodyn;
8809
8810 case R_PPC_TPREL32:
8811 if (htab->elf.tls_sec != NULL)
8812 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8813 goto dodyn;
8814
8815 case R_PPC_DTPREL32:
8816 if (htab->elf.tls_sec != NULL)
8817 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8818 goto dodyn;
8819
8820 case R_PPC_DTPMOD32:
8821 relocation = 1;
8822 addend = 0;
8823 goto dodyn;
8824
8825 case R_PPC_REL16:
8826 case R_PPC_REL16_LO:
8827 case R_PPC_REL16_HI:
8828 case R_PPC_REL16_HA:
8829 case R_PPC_REL16DX_HA:
8830 break;
8831
8832 case R_PPC_REL32:
8833 if (h == NULL || h == htab->elf.hgot)
8834 break;
8835 /* fall through */
8836
8837 case R_PPC_ADDR32:
8838 case R_PPC_ADDR16:
8839 case R_PPC_ADDR16_LO:
8840 case R_PPC_ADDR16_HI:
8841 case R_PPC_ADDR16_HA:
8842 case R_PPC_UADDR32:
8843 case R_PPC_UADDR16:
8844 goto dodyn;
8845
8846 case R_PPC_VLE_REL8:
8847 case R_PPC_VLE_REL15:
8848 case R_PPC_VLE_REL24:
8849 case R_PPC_REL24:
8850 case R_PPC_REL14:
8851 case R_PPC_REL14_BRTAKEN:
8852 case R_PPC_REL14_BRNTAKEN:
8853 /* If these relocations are not to a named symbol, they can be
8854 handled right here, no need to bother the dynamic linker. */
8855 if (SYMBOL_CALLS_LOCAL (info, h)
8856 || h == htab->elf.hgot)
8857 break;
8858 /* fall through */
8859
8860 case R_PPC_ADDR24:
8861 case R_PPC_ADDR14:
8862 case R_PPC_ADDR14_BRTAKEN:
8863 case R_PPC_ADDR14_BRNTAKEN:
8864 if (h != NULL && !bfd_link_pic (info))
8865 break;
8866 /* fall through */
8867
8868 dodyn:
8869 if ((input_section->flags & SEC_ALLOC) == 0
8870 || is_vxworks_tls)
8871 break;
8872
8873 if ((bfd_link_pic (info)
8874 && !(h != NULL
8875 && ((h->root.type == bfd_link_hash_undefined
8876 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8877 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
8878 && (must_be_dyn_reloc (info, r_type)
8879 || !SYMBOL_CALLS_LOCAL (info, h)))
8880 || (ELIMINATE_COPY_RELOCS
8881 && !bfd_link_pic (info)
8882 && h != NULL
8883 && h->dynindx != -1
8884 && !h->non_got_ref
8885 && !h->def_regular
8886 && !(h->protected_def
8887 && ppc_elf_hash_entry (h)->has_addr16_ha
8888 && ppc_elf_hash_entry (h)->has_addr16_lo
8889 && htab->params->pic_fixup > 0)))
8890 {
8891 int skip;
8892 bfd_byte *loc;
8893 asection *sreloc;
8894 long indx = 0;
8895
8896 #ifdef DEBUG
8897 fprintf (stderr, "ppc_elf_relocate_section needs to "
8898 "create relocation for %s\n",
8899 (h && h->root.root.string
8900 ? h->root.root.string : "<unknown>"));
8901 #endif
8902
8903 /* When generating a shared object, these relocations
8904 are copied into the output file to be resolved at run
8905 time. */
8906 skip = 0;
8907 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8908 input_section,
8909 rel->r_offset);
8910 if (outrel.r_offset == (bfd_vma) -1
8911 || outrel.r_offset == (bfd_vma) -2)
8912 skip = (int) outrel.r_offset;
8913 outrel.r_offset += (input_section->output_section->vma
8914 + input_section->output_offset);
8915
8916 if (skip)
8917 memset (&outrel, 0, sizeof outrel);
8918 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8919 {
8920 indx = h->dynindx;
8921 BFD_ASSERT (indx != -1);
8922 unresolved_reloc = FALSE;
8923 outrel.r_info = ELF32_R_INFO (indx, r_type);
8924 outrel.r_addend = rel->r_addend;
8925 }
8926 else
8927 {
8928 outrel.r_addend = relocation + rel->r_addend;
8929
8930 if (r_type != R_PPC_ADDR32)
8931 {
8932 if (ifunc != NULL)
8933 {
8934 /* If we get here when building a static
8935 executable, then the libc startup function
8936 responsible for applying indirect function
8937 relocations is going to complain about
8938 the reloc type.
8939 If we get here when building a dynamic
8940 executable, it will be because we have
8941 a text relocation. The dynamic loader
8942 will set the text segment writable and
8943 non-executable to apply text relocations.
8944 So we'll segfault when trying to run the
8945 indirection function to resolve the reloc. */
8946 info->callbacks->einfo
8947 /* xgettext:c-format */
8948 (_("%H: relocation %s for indirect "
8949 "function %s unsupported\n"),
8950 input_bfd, input_section, rel->r_offset,
8951 howto->name,
8952 sym_name);
8953 ret = FALSE;
8954 }
8955 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8956 ;
8957 else if (sec == NULL || sec->owner == NULL)
8958 {
8959 bfd_set_error (bfd_error_bad_value);
8960 ret = FALSE;
8961 }
8962 else
8963 {
8964 asection *osec;
8965
8966 /* We are turning this relocation into one
8967 against a section symbol. It would be
8968 proper to subtract the symbol's value,
8969 osec->vma, from the emitted reloc addend,
8970 but ld.so expects buggy relocs.
8971 FIXME: Why not always use a zero index? */
8972 osec = sec->output_section;
8973 indx = elf_section_data (osec)->dynindx;
8974 if (indx == 0)
8975 {
8976 osec = htab->elf.text_index_section;
8977 indx = elf_section_data (osec)->dynindx;
8978 }
8979 BFD_ASSERT (indx != 0);
8980 #ifdef DEBUG
8981 if (indx == 0)
8982 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8983 indx, osec->name, osec->flags,
8984 h->root.root.string);
8985 #endif
8986 }
8987
8988 outrel.r_info = ELF32_R_INFO (indx, r_type);
8989 }
8990 else if (ifunc != NULL)
8991 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8992 else
8993 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8994 }
8995
8996 sreloc = elf_section_data (input_section)->sreloc;
8997 if (ifunc)
8998 {
8999 sreloc = htab->elf.irelplt;
9000 if (indx == 0)
9001 htab->local_ifunc_resolver = 1;
9002 else if (is_static_defined (h))
9003 htab->maybe_local_ifunc_resolver = 1;
9004 }
9005 if (sreloc == NULL)
9006 return FALSE;
9007
9008 loc = sreloc->contents;
9009 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9010 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9011
9012 if (skip == -1)
9013 goto copy_reloc;
9014
9015 /* This reloc will be computed at runtime. Clear the memory
9016 so that it contains a predictable value for prelink. */
9017 if (!skip)
9018 {
9019 relocation = howto->pc_relative ? outrel.r_offset : 0;
9020 addend = 0;
9021 break;
9022 }
9023 }
9024 break;
9025
9026 case R_PPC_RELAX_PLT:
9027 case R_PPC_RELAX_PLTREL24:
9028 if (h != NULL)
9029 {
9030 struct plt_entry *ent;
9031 bfd_vma got2_addend = 0;
9032
9033 if (r_type == R_PPC_RELAX_PLTREL24)
9034 {
9035 if (bfd_link_pic (info))
9036 got2_addend = addend;
9037 addend = 0;
9038 }
9039 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9040 if (htab->plt_type == PLT_NEW)
9041 relocation = (htab->glink->output_section->vma
9042 + htab->glink->output_offset
9043 + ent->glink_offset);
9044 else
9045 relocation = (htab->elf.splt->output_section->vma
9046 + htab->elf.splt->output_offset
9047 + ent->plt.offset);
9048 }
9049 /* Fall through. */
9050
9051 case R_PPC_RELAX:
9052 {
9053 const int *stub;
9054 size_t size;
9055 size_t insn_offset = rel->r_offset;
9056 unsigned int insn;
9057
9058 if (bfd_link_pic (info))
9059 {
9060 relocation -= (input_section->output_section->vma
9061 + input_section->output_offset
9062 + rel->r_offset - 4);
9063 stub = shared_stub_entry;
9064 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9065 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9066 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9067 stub += 3;
9068 size = ARRAY_SIZE (shared_stub_entry) - 3;
9069 }
9070 else
9071 {
9072 stub = stub_entry;
9073 size = ARRAY_SIZE (stub_entry);
9074 }
9075
9076 relocation += addend;
9077 if (bfd_link_relocatable (info))
9078 relocation = 0;
9079
9080 /* First insn is HA, second is LO. */
9081 insn = *stub++;
9082 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9083 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9084 insn_offset += 4;
9085
9086 insn = *stub++;
9087 insn |= relocation & 0xffff;
9088 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9089 insn_offset += 4;
9090 size -= 2;
9091
9092 while (size != 0)
9093 {
9094 insn = *stub++;
9095 --size;
9096 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9097 insn_offset += 4;
9098 }
9099
9100 /* Rewrite the reloc and convert one of the trailing nop
9101 relocs to describe this relocation. */
9102 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9103 /* The relocs are at the bottom 2 bytes */
9104 wrel->r_offset = rel->r_offset + d_offset;
9105 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9106 wrel->r_addend = rel->r_addend;
9107 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9108 wrel++, rel++;
9109 wrel->r_offset += 4;
9110 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9111 }
9112 continue;
9113
9114 /* Indirect .sdata relocation. */
9115 case R_PPC_EMB_SDAI16:
9116 BFD_ASSERT (htab->sdata[0].section != NULL);
9117 if (!is_static_defined (htab->sdata[0].sym))
9118 {
9119 unresolved_reloc = TRUE;
9120 break;
9121 }
9122 relocation
9123 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9124 h, relocation, rel);
9125 addend = 0;
9126 break;
9127
9128 /* Indirect .sdata2 relocation. */
9129 case R_PPC_EMB_SDA2I16:
9130 BFD_ASSERT (htab->sdata[1].section != NULL);
9131 if (!is_static_defined (htab->sdata[1].sym))
9132 {
9133 unresolved_reloc = TRUE;
9134 break;
9135 }
9136 relocation
9137 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9138 h, relocation, rel);
9139 addend = 0;
9140 break;
9141
9142 /* Handle the TOC16 reloc. We want to use the offset within the .got
9143 section, not the actual VMA. This is appropriate when generating
9144 an embedded ELF object, for which the .got section acts like the
9145 AIX .toc section. */
9146 case R_PPC_TOC16: /* phony GOT16 relocations */
9147 if (sec == NULL || sec->output_section == NULL)
9148 {
9149 unresolved_reloc = TRUE;
9150 break;
9151 }
9152 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9153 ".got") == 0
9154 || strcmp (bfd_get_section_name (sec->owner, sec),
9155 ".cgot") == 0);
9156
9157 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9158 break;
9159
9160 case R_PPC_PLTREL24:
9161 if (h != NULL && ifunc == NULL)
9162 {
9163 struct plt_entry *ent;
9164
9165 ent = find_plt_ent (&h->plt.plist, got2,
9166 bfd_link_pic (info) ? addend : 0);
9167 if (ent == NULL
9168 || htab->elf.splt == NULL)
9169 {
9170 /* We didn't make a PLT entry for this symbol. This
9171 happens when statically linking PIC code, or when
9172 using -Bsymbolic. */
9173 }
9174 else
9175 {
9176 /* Relocation is to the entry for this symbol in the
9177 procedure linkage table. */
9178 unresolved_reloc = FALSE;
9179 if (htab->plt_type == PLT_NEW)
9180 relocation = (htab->glink->output_section->vma
9181 + htab->glink->output_offset
9182 + ent->glink_offset);
9183 else
9184 relocation = (htab->elf.splt->output_section->vma
9185 + htab->elf.splt->output_offset
9186 + ent->plt.offset);
9187 }
9188 }
9189
9190 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9191 addend specifies the GOT pointer offset within .got2.
9192 Don't apply it to the relocation field. */
9193 addend = 0;
9194 break;
9195
9196 /* Relocate against _SDA_BASE_. */
9197 case R_PPC_SDAREL16:
9198 {
9199 const char *name;
9200 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9201
9202 if (sec == NULL
9203 || sec->output_section == NULL
9204 || !is_static_defined (sda))
9205 {
9206 unresolved_reloc = TRUE;
9207 break;
9208 }
9209 addend -= SYM_VAL (sda);
9210
9211 name = bfd_get_section_name (output_bfd, sec->output_section);
9212 if (!(strcmp (name, ".sdata") == 0
9213 || strcmp (name, ".sbss") == 0))
9214 {
9215 info->callbacks->einfo
9216 /* xgettext:c-format */
9217 (_("%P: %B: the target (%s) of a %s relocation is "
9218 "in the wrong output section (%s)\n"),
9219 input_bfd,
9220 sym_name,
9221 howto->name,
9222 name);
9223 }
9224 }
9225 break;
9226
9227 /* Relocate against _SDA2_BASE_. */
9228 case R_PPC_EMB_SDA2REL:
9229 {
9230 const char *name;
9231 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9232
9233 if (sec == NULL
9234 || sec->output_section == NULL
9235 || !is_static_defined (sda))
9236 {
9237 unresolved_reloc = TRUE;
9238 break;
9239 }
9240 addend -= SYM_VAL (sda);
9241
9242 name = bfd_get_section_name (output_bfd, sec->output_section);
9243 if (!(strcmp (name, ".sdata2") == 0
9244 || strcmp (name, ".sbss2") == 0))
9245 {
9246 info->callbacks->einfo
9247 /* xgettext:c-format */
9248 (_("%P: %B: the target (%s) of a %s relocation is "
9249 "in the wrong output section (%s)\n"),
9250 input_bfd,
9251 sym_name,
9252 howto->name,
9253 name);
9254 }
9255 }
9256 break;
9257
9258 case R_PPC_VLE_LO16A:
9259 relocation = relocation + addend;
9260 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9261 contents + rel->r_offset, relocation,
9262 split16a_type, htab->params->vle_reloc_fixup);
9263 goto copy_reloc;
9264
9265 case R_PPC_VLE_LO16D:
9266 relocation = relocation + addend;
9267 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9268 contents + rel->r_offset, relocation,
9269 split16d_type, htab->params->vle_reloc_fixup);
9270 goto copy_reloc;
9271
9272 case R_PPC_VLE_HI16A:
9273 relocation = (relocation + addend) >> 16;
9274 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9275 contents + rel->r_offset, relocation,
9276 split16a_type, htab->params->vle_reloc_fixup);
9277 goto copy_reloc;
9278
9279 case R_PPC_VLE_HI16D:
9280 relocation = (relocation + addend) >> 16;
9281 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9282 contents + rel->r_offset, relocation,
9283 split16d_type, htab->params->vle_reloc_fixup);
9284 goto copy_reloc;
9285
9286 case R_PPC_VLE_HA16A:
9287 relocation = (relocation + addend + 0x8000) >> 16;
9288 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9289 contents + rel->r_offset, relocation,
9290 split16a_type, htab->params->vle_reloc_fixup);
9291 goto copy_reloc;
9292
9293 case R_PPC_VLE_HA16D:
9294 relocation = (relocation + addend + 0x8000) >> 16;
9295 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9296 contents + rel->r_offset, relocation,
9297 split16d_type, htab->params->vle_reloc_fixup);
9298 goto copy_reloc;
9299
9300 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9301 case R_PPC_EMB_SDA21:
9302 case R_PPC_VLE_SDA21:
9303 case R_PPC_EMB_RELSDA:
9304 case R_PPC_VLE_SDA21_LO:
9305 {
9306 const char *name;
9307 int reg;
9308 unsigned int insn;
9309 struct elf_link_hash_entry *sda = NULL;
9310
9311 if (sec == NULL || sec->output_section == NULL)
9312 {
9313 unresolved_reloc = TRUE;
9314 break;
9315 }
9316
9317 name = bfd_get_section_name (output_bfd, sec->output_section);
9318 if (strcmp (name, ".sdata") == 0
9319 || strcmp (name, ".sbss") == 0)
9320 {
9321 reg = 13;
9322 sda = htab->sdata[0].sym;
9323 }
9324 else if (strcmp (name, ".sdata2") == 0
9325 || strcmp (name, ".sbss2") == 0)
9326 {
9327 reg = 2;
9328 sda = htab->sdata[1].sym;
9329 }
9330 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9331 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9332 {
9333 reg = 0;
9334 }
9335 else
9336 {
9337 info->callbacks->einfo
9338 /* xgettext:c-format */
9339 (_("%P: %B: the target (%s) of a %s relocation is "
9340 "in the wrong output section (%s)\n"),
9341 input_bfd,
9342 sym_name,
9343 howto->name,
9344 name);
9345
9346 bfd_set_error (bfd_error_bad_value);
9347 ret = FALSE;
9348 goto copy_reloc;
9349 }
9350
9351 if (sda != NULL)
9352 {
9353 if (!is_static_defined (sda))
9354 {
9355 unresolved_reloc = TRUE;
9356 break;
9357 }
9358 addend -= SYM_VAL (sda);
9359 }
9360
9361 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9362 if (reg == 0
9363 && (r_type == R_PPC_VLE_SDA21
9364 || r_type == R_PPC_VLE_SDA21_LO))
9365 {
9366 relocation = relocation + addend;
9367 addend = 0;
9368
9369 /* Force e_li insn, keeping RT from original insn. */
9370 insn &= 0x1f << 21;
9371 insn |= 28u << 26;
9372
9373 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9374 /* Top 4 bits of value to 17..20. */
9375 insn |= (relocation & 0xf0000) >> 5;
9376 /* Next 5 bits of the value to 11..15. */
9377 insn |= (relocation & 0xf800) << 5;
9378 /* And the final 11 bits of the value to bits 21 to 31. */
9379 insn |= relocation & 0x7ff;
9380
9381 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9382
9383 if (r_type == R_PPC_VLE_SDA21
9384 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9385 goto overflow;
9386 goto copy_reloc;
9387 }
9388 else if (r_type == R_PPC_EMB_SDA21
9389 || r_type == R_PPC_VLE_SDA21
9390 || r_type == R_PPC_VLE_SDA21_LO)
9391 {
9392 /* Fill in register field. */
9393 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9394 }
9395 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9396 }
9397 break;
9398
9399 case R_PPC_VLE_SDAREL_LO16A:
9400 case R_PPC_VLE_SDAREL_LO16D:
9401 case R_PPC_VLE_SDAREL_HI16A:
9402 case R_PPC_VLE_SDAREL_HI16D:
9403 case R_PPC_VLE_SDAREL_HA16A:
9404 case R_PPC_VLE_SDAREL_HA16D:
9405 {
9406 bfd_vma value;
9407 const char *name;
9408 struct elf_link_hash_entry *sda = NULL;
9409
9410 if (sec == NULL || sec->output_section == NULL)
9411 {
9412 unresolved_reloc = TRUE;
9413 break;
9414 }
9415
9416 name = bfd_get_section_name (output_bfd, sec->output_section);
9417 if (strcmp (name, ".sdata") == 0
9418 || strcmp (name, ".sbss") == 0)
9419 sda = htab->sdata[0].sym;
9420 else if (strcmp (name, ".sdata2") == 0
9421 || strcmp (name, ".sbss2") == 0)
9422 sda = htab->sdata[1].sym;
9423 else
9424 {
9425 _bfd_error_handler
9426 /* xgettext:c-format */
9427 (_("%B: the target (%s) of a %s relocation is "
9428 "in the wrong output section (%s)"),
9429 input_bfd,
9430 sym_name,
9431 howto->name,
9432 name);
9433
9434 bfd_set_error (bfd_error_bad_value);
9435 ret = FALSE;
9436 goto copy_reloc;
9437 }
9438
9439 if (sda == NULL || !is_static_defined (sda))
9440 {
9441 unresolved_reloc = TRUE;
9442 break;
9443 }
9444 value = relocation + addend - SYM_VAL (sda);
9445
9446 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9447 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9448 contents + rel->r_offset, value,
9449 split16a_type,
9450 htab->params->vle_reloc_fixup);
9451 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9452 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9453 contents + rel->r_offset, value,
9454 split16d_type,
9455 htab->params->vle_reloc_fixup);
9456 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9457 {
9458 value = value >> 16;
9459 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9460 contents + rel->r_offset, value,
9461 split16a_type,
9462 htab->params->vle_reloc_fixup);
9463 }
9464 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9465 {
9466 value = value >> 16;
9467 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9468 contents + rel->r_offset, value,
9469 split16d_type,
9470 htab->params->vle_reloc_fixup);
9471 }
9472 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9473 {
9474 value = (value + 0x8000) >> 16;
9475 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9476 contents + rel->r_offset, value,
9477 split16a_type,
9478 htab->params->vle_reloc_fixup);
9479 }
9480 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9481 {
9482 value = (value + 0x8000) >> 16;
9483 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9484 contents + rel->r_offset, value,
9485 split16d_type,
9486 htab->params->vle_reloc_fixup);
9487 }
9488 }
9489 goto copy_reloc;
9490
9491 case R_PPC_VLE_ADDR20:
9492 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9493 continue;
9494
9495 /* Relocate against the beginning of the section. */
9496 case R_PPC_SECTOFF:
9497 case R_PPC_SECTOFF_LO:
9498 case R_PPC_SECTOFF_HI:
9499 case R_PPC_SECTOFF_HA:
9500 if (sec == NULL || sec->output_section == NULL)
9501 {
9502 unresolved_reloc = TRUE;
9503 break;
9504 }
9505 addend -= sec->output_section->vma;
9506 break;
9507
9508 /* Negative relocations. */
9509 case R_PPC_EMB_NADDR32:
9510 case R_PPC_EMB_NADDR16:
9511 case R_PPC_EMB_NADDR16_LO:
9512 case R_PPC_EMB_NADDR16_HI:
9513 case R_PPC_EMB_NADDR16_HA:
9514 addend -= 2 * relocation;
9515 break;
9516
9517 case R_PPC_COPY:
9518 case R_PPC_GLOB_DAT:
9519 case R_PPC_JMP_SLOT:
9520 case R_PPC_RELATIVE:
9521 case R_PPC_IRELATIVE:
9522 case R_PPC_PLT32:
9523 case R_PPC_PLTREL32:
9524 case R_PPC_PLT16_LO:
9525 case R_PPC_PLT16_HI:
9526 case R_PPC_PLT16_HA:
9527 case R_PPC_ADDR30:
9528 case R_PPC_EMB_RELSEC16:
9529 case R_PPC_EMB_RELST_LO:
9530 case R_PPC_EMB_RELST_HI:
9531 case R_PPC_EMB_RELST_HA:
9532 case R_PPC_EMB_BIT_FLD:
9533 info->callbacks->einfo
9534 /* xgettext:c-format */
9535 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9536 input_bfd,
9537 howto->name,
9538 sym_name);
9539
9540 bfd_set_error (bfd_error_invalid_operation);
9541 ret = FALSE;
9542 goto copy_reloc;
9543 }
9544
9545 /* Do any further special processing. */
9546 switch (r_type)
9547 {
9548 default:
9549 break;
9550
9551 case R_PPC_ADDR16_HA:
9552 case R_PPC_REL16_HA:
9553 case R_PPC_REL16DX_HA:
9554 case R_PPC_SECTOFF_HA:
9555 case R_PPC_TPREL16_HA:
9556 case R_PPC_DTPREL16_HA:
9557 case R_PPC_EMB_NADDR16_HA:
9558 case R_PPC_EMB_RELST_HA:
9559 /* It's just possible that this symbol is a weak symbol
9560 that's not actually defined anywhere. In that case,
9561 'sec' would be NULL, and we should leave the symbol
9562 alone (it will be set to zero elsewhere in the link). */
9563 if (sec == NULL)
9564 break;
9565 /* Fall through. */
9566
9567 case R_PPC_PLT16_HA:
9568 case R_PPC_GOT16_HA:
9569 case R_PPC_GOT_TLSGD16_HA:
9570 case R_PPC_GOT_TLSLD16_HA:
9571 case R_PPC_GOT_TPREL16_HA:
9572 case R_PPC_GOT_DTPREL16_HA:
9573 /* Add 0x10000 if sign bit in 0:15 is set.
9574 Bits 0:15 are not used. */
9575 addend += 0x8000;
9576 break;
9577
9578 case R_PPC_ADDR16:
9579 case R_PPC_ADDR16_LO:
9580 case R_PPC_GOT16:
9581 case R_PPC_GOT16_LO:
9582 case R_PPC_SDAREL16:
9583 case R_PPC_SECTOFF:
9584 case R_PPC_SECTOFF_LO:
9585 case R_PPC_DTPREL16:
9586 case R_PPC_DTPREL16_LO:
9587 case R_PPC_TPREL16:
9588 case R_PPC_TPREL16_LO:
9589 case R_PPC_GOT_TLSGD16:
9590 case R_PPC_GOT_TLSGD16_LO:
9591 case R_PPC_GOT_TLSLD16:
9592 case R_PPC_GOT_TLSLD16_LO:
9593 case R_PPC_GOT_DTPREL16:
9594 case R_PPC_GOT_DTPREL16_LO:
9595 case R_PPC_GOT_TPREL16:
9596 case R_PPC_GOT_TPREL16_LO:
9597 {
9598 /* The 32-bit ABI lacks proper relocations to deal with
9599 certain 64-bit instructions. Prevent damage to bits
9600 that make up part of the insn opcode. */
9601 unsigned int insn, mask, lobit;
9602
9603 insn = bfd_get_32 (input_bfd,
9604 contents + rel->r_offset - d_offset);
9605 mask = 0;
9606 if (is_insn_ds_form (insn))
9607 mask = 3;
9608 else if (is_insn_dq_form (insn))
9609 mask = 15;
9610 else
9611 break;
9612 relocation += addend;
9613 addend = insn & mask;
9614 lobit = mask & relocation;
9615 if (lobit != 0)
9616 {
9617 relocation ^= lobit;
9618 info->callbacks->einfo
9619 /* xgettext:c-format */
9620 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9621 input_bfd, input_section, rel->r_offset,
9622 howto->name, sym_name, mask + 1);
9623 bfd_set_error (bfd_error_bad_value);
9624 ret = FALSE;
9625 }
9626 }
9627 break;
9628 }
9629
9630 #ifdef DEBUG
9631 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9632 "offset = %ld, addend = %ld\n",
9633 howto->name,
9634 (int) r_type,
9635 sym_name,
9636 r_symndx,
9637 (long) rel->r_offset,
9638 (long) addend);
9639 #endif
9640
9641 if (unresolved_reloc
9642 && !((input_section->flags & SEC_DEBUGGING) != 0
9643 && h->def_dynamic)
9644 && _bfd_elf_section_offset (output_bfd, info, input_section,
9645 rel->r_offset) != (bfd_vma) -1)
9646 {
9647 info->callbacks->einfo
9648 /* xgettext:c-format */
9649 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9650 input_bfd, input_section, rel->r_offset,
9651 howto->name,
9652 sym_name);
9653 ret = FALSE;
9654 }
9655
9656 /* 16-bit fields in insns mostly have signed values, but a
9657 few insns have 16-bit unsigned values. Really, we should
9658 have different reloc types. */
9659 if (howto->complain_on_overflow != complain_overflow_dont
9660 && howto->dst_mask == 0xffff
9661 && (input_section->flags & SEC_CODE) != 0)
9662 {
9663 enum complain_overflow complain = complain_overflow_signed;
9664
9665 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9666 {
9667 unsigned int insn;
9668
9669 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9670 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9671 complain = complain_overflow_bitfield;
9672 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9673 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9674 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9675 complain = complain_overflow_unsigned;
9676 }
9677 if (howto->complain_on_overflow != complain)
9678 {
9679 alt_howto = *howto;
9680 alt_howto.complain_on_overflow = complain;
9681 howto = &alt_howto;
9682 }
9683 }
9684
9685 if (r_type == R_PPC_REL16DX_HA)
9686 {
9687 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9688 if (rel->r_offset + 4 > input_section->size)
9689 r = bfd_reloc_outofrange;
9690 else
9691 {
9692 unsigned int insn;
9693
9694 relocation += addend;
9695 relocation -= (rel->r_offset
9696 + input_section->output_offset
9697 + input_section->output_section->vma);
9698 relocation >>= 16;
9699 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9700 insn &= ~0x1fffc1;
9701 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9702 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9703 r = bfd_reloc_ok;
9704 }
9705 }
9706 else
9707 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9708 rel->r_offset, relocation, addend);
9709
9710 if (r != bfd_reloc_ok)
9711 {
9712 if (r == bfd_reloc_overflow)
9713 {
9714 overflow:
9715 /* On code like "if (foo) foo();" don't report overflow
9716 on a branch to zero when foo is undefined. */
9717 if (!warned
9718 && !(h != NULL
9719 && (h->root.type == bfd_link_hash_undefweak
9720 || h->root.type == bfd_link_hash_undefined)
9721 && is_branch_reloc (r_type)))
9722 info->callbacks->reloc_overflow
9723 (info, (h ? &h->root : NULL), sym_name, howto->name,
9724 rel->r_addend, input_bfd, input_section, rel->r_offset);
9725 }
9726 else
9727 {
9728 info->callbacks->einfo
9729 /* xgettext:c-format */
9730 (_("%H: %s reloc against `%s': error %d\n"),
9731 input_bfd, input_section, rel->r_offset,
9732 howto->name, sym_name, (int) r);
9733 ret = FALSE;
9734 }
9735 }
9736 copy_reloc:
9737 if (wrel != rel)
9738 *wrel = *rel;
9739 }
9740
9741 if (wrel != rel)
9742 {
9743 Elf_Internal_Shdr *rel_hdr;
9744 size_t deleted = rel - wrel;
9745
9746 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9747 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9748 if (rel_hdr->sh_size == 0)
9749 {
9750 /* It is too late to remove an empty reloc section. Leave
9751 one NONE reloc.
9752 ??? What is wrong with an empty section??? */
9753 rel_hdr->sh_size = rel_hdr->sh_entsize;
9754 deleted -= 1;
9755 wrel++;
9756 }
9757 relend = wrel;
9758 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9759 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9760 input_section->reloc_count -= deleted;
9761 }
9762
9763 #ifdef DEBUG
9764 fprintf (stderr, "\n");
9765 #endif
9766
9767 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9768 && input_section->size != input_section->rawsize
9769 && (strcmp (input_section->output_section->name, ".init") == 0
9770 || strcmp (input_section->output_section->name, ".fini") == 0))
9771 {
9772 /* Branch around the trampolines. */
9773 unsigned int insn = B + input_section->size - input_section->rawsize;
9774 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9775 }
9776
9777 if (htab->params->ppc476_workaround
9778 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9779 && (!bfd_link_relocatable (info)
9780 || (input_section->output_section->alignment_power
9781 >= htab->params->pagesize_p2)))
9782 {
9783 bfd_vma start_addr, end_addr, addr;
9784 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9785
9786 if (relax_info->workaround_size != 0)
9787 {
9788 bfd_byte *p;
9789 unsigned int n;
9790 bfd_byte fill[4];
9791
9792 bfd_put_32 (input_bfd, BA, fill);
9793 p = contents + input_section->size - relax_info->workaround_size;
9794 n = relax_info->workaround_size >> 2;
9795 while (n--)
9796 {
9797 memcpy (p, fill, 4);
9798 p += 4;
9799 }
9800 }
9801
9802 /* The idea is: Replace the last instruction on a page with a
9803 branch to a patch area. Put the insn there followed by a
9804 branch back to the next page. Complicated a little by
9805 needing to handle moved conditional branches, and by not
9806 wanting to touch data-in-text. */
9807
9808 start_addr = (input_section->output_section->vma
9809 + input_section->output_offset);
9810 end_addr = (start_addr + input_section->size
9811 - relax_info->workaround_size);
9812 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9813 addr < end_addr;
9814 addr += pagesize)
9815 {
9816 bfd_vma offset = addr - start_addr;
9817 Elf_Internal_Rela *lo, *hi;
9818 bfd_boolean is_data;
9819 bfd_vma patch_off, patch_addr;
9820 unsigned int insn;
9821
9822 /* Do we have a data reloc at this offset? If so, leave
9823 the word alone. */
9824 is_data = FALSE;
9825 lo = relocs;
9826 hi = relend;
9827 rel = NULL;
9828 while (lo < hi)
9829 {
9830 rel = lo + (hi - lo) / 2;
9831 if (rel->r_offset < offset)
9832 lo = rel + 1;
9833 else if (rel->r_offset > offset + 3)
9834 hi = rel;
9835 else
9836 {
9837 switch (ELF32_R_TYPE (rel->r_info))
9838 {
9839 case R_PPC_ADDR32:
9840 case R_PPC_UADDR32:
9841 case R_PPC_REL32:
9842 case R_PPC_ADDR30:
9843 is_data = TRUE;
9844 break;
9845 default:
9846 break;
9847 }
9848 break;
9849 }
9850 }
9851 if (is_data)
9852 continue;
9853
9854 /* Some instructions can be left alone too. Unconditional
9855 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9856 avoid the icache failure.
9857
9858 The problem occurs due to prefetch across a page boundary
9859 where stale instructions can be fetched from the next
9860 page, and the mechanism for flushing these bad
9861 instructions fails under certain circumstances. The
9862 unconditional branches:
9863 1) Branch: b, bl, ba, bla,
9864 2) Branch Conditional: bc, bca, bcl, bcla,
9865 3) Branch Conditional to Link Register: bclr, bclrl,
9866 where (2) and (3) have BO=0x14 making them unconditional,
9867 prevent the bad prefetch because the prefetch itself is
9868 affected by these instructions. This happens even if the
9869 instruction is not executed.
9870
9871 A bctr example:
9872 .
9873 . lis 9,new_page@ha
9874 . addi 9,9,new_page@l
9875 . mtctr 9
9876 . bctr
9877 . nop
9878 . nop
9879 . new_page:
9880 .
9881 The bctr is not predicted taken due to ctr not being
9882 ready, so prefetch continues on past the bctr into the
9883 new page which might have stale instructions. If they
9884 fail to be flushed, then they will be executed after the
9885 bctr executes. Either of the following modifications
9886 prevent the bad prefetch from happening in the first
9887 place:
9888 .
9889 . lis 9,new_page@ha lis 9,new_page@ha
9890 . addi 9,9,new_page@l addi 9,9,new_page@l
9891 . mtctr 9 mtctr 9
9892 . bctr bctr
9893 . nop b somewhere_else
9894 . b somewhere_else nop
9895 . new_page: new_page:
9896 . */
9897 insn = bfd_get_32 (input_bfd, contents + offset);
9898 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9899 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9900 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9901 || ((insn & (0x3f << 26)) == (19u << 26)
9902 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9903 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9904 continue;
9905
9906 patch_addr = (start_addr + input_section->size
9907 - relax_info->workaround_size);
9908 patch_addr = (patch_addr + 15) & -16;
9909 patch_off = patch_addr - start_addr;
9910 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9911
9912 if (rel != NULL
9913 && rel->r_offset >= offset
9914 && rel->r_offset < offset + 4)
9915 {
9916 asection *sreloc;
9917
9918 /* If the insn we are patching had a reloc, adjust the
9919 reloc r_offset so that the reloc applies to the moved
9920 location. This matters for -r and --emit-relocs. */
9921 if (rel + 1 != relend)
9922 {
9923 Elf_Internal_Rela tmp = *rel;
9924
9925 /* Keep the relocs sorted by r_offset. */
9926 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9927 relend[-1] = tmp;
9928 }
9929 relend[-1].r_offset += patch_off - offset;
9930
9931 /* Adjust REL16 addends too. */
9932 switch (ELF32_R_TYPE (relend[-1].r_info))
9933 {
9934 case R_PPC_REL16:
9935 case R_PPC_REL16_LO:
9936 case R_PPC_REL16_HI:
9937 case R_PPC_REL16_HA:
9938 relend[-1].r_addend += patch_off - offset;
9939 break;
9940 default:
9941 break;
9942 }
9943
9944 /* If we are building a PIE or shared library with
9945 non-PIC objects, perhaps we had a dynamic reloc too?
9946 If so, the dynamic reloc must move with the insn. */
9947 sreloc = elf_section_data (input_section)->sreloc;
9948 if (sreloc != NULL)
9949 {
9950 Elf32_External_Rela *slo, *shi, *srelend;
9951 bfd_vma soffset;
9952
9953 slo = (Elf32_External_Rela *) sreloc->contents;
9954 shi = srelend = slo + sreloc->reloc_count;
9955 soffset = (offset + input_section->output_section->vma
9956 + input_section->output_offset);
9957 while (slo < shi)
9958 {
9959 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9960 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9961 &outrel);
9962 if (outrel.r_offset < soffset)
9963 slo = srel + 1;
9964 else if (outrel.r_offset > soffset + 3)
9965 shi = srel;
9966 else
9967 {
9968 if (srel + 1 != srelend)
9969 {
9970 memmove (srel, srel + 1,
9971 (srelend - (srel + 1)) * sizeof (*srel));
9972 srel = srelend - 1;
9973 }
9974 outrel.r_offset += patch_off - offset;
9975 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9976 (bfd_byte *) srel);
9977 break;
9978 }
9979 }
9980 }
9981 }
9982 else
9983 rel = NULL;
9984
9985 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9986 && (insn & 2) == 0 /* relative */)
9987 {
9988 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9989
9990 delta += offset - patch_off;
9991 if (bfd_link_relocatable (info) && rel != NULL)
9992 delta = 0;
9993 if (!bfd_link_relocatable (info) && rel != NULL)
9994 {
9995 enum elf_ppc_reloc_type r_type;
9996
9997 r_type = ELF32_R_TYPE (relend[-1].r_info);
9998 if (r_type == R_PPC_REL14_BRTAKEN)
9999 insn |= BRANCH_PREDICT_BIT;
10000 else if (r_type == R_PPC_REL14_BRNTAKEN)
10001 insn &= ~BRANCH_PREDICT_BIT;
10002 else
10003 BFD_ASSERT (r_type == R_PPC_REL14);
10004
10005 if ((r_type == R_PPC_REL14_BRTAKEN
10006 || r_type == R_PPC_REL14_BRNTAKEN)
10007 && delta + 0x8000 < 0x10000
10008 && (bfd_signed_vma) delta < 0)
10009 insn ^= BRANCH_PREDICT_BIT;
10010 }
10011 if (delta + 0x8000 < 0x10000)
10012 {
10013 bfd_put_32 (input_bfd,
10014 (insn & ~0xfffc) | (delta & 0xfffc),
10015 contents + patch_off);
10016 patch_off += 4;
10017 bfd_put_32 (input_bfd,
10018 B | ((offset + 4 - patch_off) & 0x3fffffc),
10019 contents + patch_off);
10020 patch_off += 4;
10021 }
10022 else
10023 {
10024 if (rel != NULL)
10025 {
10026 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10027
10028 relend[-1].r_offset += 8;
10029 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10030 }
10031 bfd_put_32 (input_bfd,
10032 (insn & ~0xfffc) | 8,
10033 contents + patch_off);
10034 patch_off += 4;
10035 bfd_put_32 (input_bfd,
10036 B | ((offset + 4 - patch_off) & 0x3fffffc),
10037 contents + patch_off);
10038 patch_off += 4;
10039 bfd_put_32 (input_bfd,
10040 B | ((delta - 8) & 0x3fffffc),
10041 contents + patch_off);
10042 patch_off += 4;
10043 }
10044 }
10045 else
10046 {
10047 bfd_put_32 (input_bfd, insn, contents + patch_off);
10048 patch_off += 4;
10049 bfd_put_32 (input_bfd,
10050 B | ((offset + 4 - patch_off) & 0x3fffffc),
10051 contents + patch_off);
10052 patch_off += 4;
10053 }
10054 BFD_ASSERT (patch_off <= input_section->size);
10055 relax_info->workaround_size = input_section->size - patch_off;
10056 }
10057 }
10058
10059 return ret;
10060 }
10061 \f
10062 /* Finish up dynamic symbol handling. We set the contents of various
10063 dynamic sections here. */
10064
10065 static bfd_boolean
10066 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10067 struct bfd_link_info *info,
10068 struct elf_link_hash_entry *h,
10069 Elf_Internal_Sym *sym)
10070 {
10071 struct ppc_elf_link_hash_table *htab;
10072 struct plt_entry *ent;
10073 bfd_boolean doneone;
10074
10075 #ifdef DEBUG
10076 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10077 h->root.root.string);
10078 #endif
10079
10080 htab = ppc_elf_hash_table (info);
10081 BFD_ASSERT (htab->elf.dynobj != NULL);
10082
10083 doneone = FALSE;
10084 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10085 if (ent->plt.offset != (bfd_vma) -1)
10086 {
10087 if (!doneone)
10088 {
10089 Elf_Internal_Rela rela;
10090 bfd_byte *loc;
10091 bfd_vma reloc_index;
10092
10093 if (htab->plt_type == PLT_NEW
10094 || !htab->elf.dynamic_sections_created
10095 || h->dynindx == -1)
10096 reloc_index = ent->plt.offset / 4;
10097 else
10098 {
10099 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10100 / htab->plt_slot_size);
10101 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10102 && htab->plt_type == PLT_OLD)
10103 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10104 }
10105
10106 /* This symbol has an entry in the procedure linkage table.
10107 Set it up. */
10108 if (htab->plt_type == PLT_VXWORKS
10109 && htab->elf.dynamic_sections_created
10110 && h->dynindx != -1)
10111 {
10112 bfd_vma got_offset;
10113 const bfd_vma *plt_entry;
10114
10115 /* The first three entries in .got.plt are reserved. */
10116 got_offset = (reloc_index + 3) * 4;
10117
10118 /* Use the right PLT. */
10119 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10120 : ppc_elf_vxworks_plt_entry;
10121
10122 /* Fill in the .plt on VxWorks. */
10123 if (bfd_link_pic (info))
10124 {
10125 bfd_put_32 (output_bfd,
10126 plt_entry[0] | PPC_HA (got_offset),
10127 htab->elf.splt->contents + ent->plt.offset + 0);
10128 bfd_put_32 (output_bfd,
10129 plt_entry[1] | PPC_LO (got_offset),
10130 htab->elf.splt->contents + ent->plt.offset + 4);
10131 }
10132 else
10133 {
10134 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10135
10136 bfd_put_32 (output_bfd,
10137 plt_entry[0] | PPC_HA (got_loc),
10138 htab->elf.splt->contents + ent->plt.offset + 0);
10139 bfd_put_32 (output_bfd,
10140 plt_entry[1] | PPC_LO (got_loc),
10141 htab->elf.splt->contents + ent->plt.offset + 4);
10142 }
10143
10144 bfd_put_32 (output_bfd, plt_entry[2],
10145 htab->elf.splt->contents + ent->plt.offset + 8);
10146 bfd_put_32 (output_bfd, plt_entry[3],
10147 htab->elf.splt->contents + ent->plt.offset + 12);
10148
10149 /* This instruction is an immediate load. The value loaded is
10150 the byte offset of the R_PPC_JMP_SLOT relocation from the
10151 start of the .rela.plt section. The value is stored in the
10152 low-order 16 bits of the load instruction. */
10153 /* NOTE: It appears that this is now an index rather than a
10154 prescaled offset. */
10155 bfd_put_32 (output_bfd,
10156 plt_entry[4] | reloc_index,
10157 htab->elf.splt->contents + ent->plt.offset + 16);
10158 /* This instruction is a PC-relative branch whose target is
10159 the start of the PLT section. The address of this branch
10160 instruction is 20 bytes beyond the start of this PLT entry.
10161 The address is encoded in bits 6-29, inclusive. The value
10162 stored is right-shifted by two bits, permitting a 26-bit
10163 offset. */
10164 bfd_put_32 (output_bfd,
10165 (plt_entry[5]
10166 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10167 htab->elf.splt->contents + ent->plt.offset + 20);
10168 bfd_put_32 (output_bfd, plt_entry[6],
10169 htab->elf.splt->contents + ent->plt.offset + 24);
10170 bfd_put_32 (output_bfd, plt_entry[7],
10171 htab->elf.splt->contents + ent->plt.offset + 28);
10172
10173 /* Fill in the GOT entry corresponding to this PLT slot with
10174 the address immediately after the "bctr" instruction
10175 in this PLT entry. */
10176 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10177 + htab->elf.splt->output_offset
10178 + ent->plt.offset + 16),
10179 htab->elf.sgotplt->contents + got_offset);
10180
10181 if (!bfd_link_pic (info))
10182 {
10183 /* Fill in a couple of entries in .rela.plt.unloaded. */
10184 loc = htab->srelplt2->contents
10185 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10186 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10187 * sizeof (Elf32_External_Rela));
10188
10189 /* Provide the @ha relocation for the first instruction. */
10190 rela.r_offset = (htab->elf.splt->output_section->vma
10191 + htab->elf.splt->output_offset
10192 + ent->plt.offset + 2);
10193 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10194 R_PPC_ADDR16_HA);
10195 rela.r_addend = got_offset;
10196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10197 loc += sizeof (Elf32_External_Rela);
10198
10199 /* Provide the @l relocation for the second instruction. */
10200 rela.r_offset = (htab->elf.splt->output_section->vma
10201 + htab->elf.splt->output_offset
10202 + ent->plt.offset + 6);
10203 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10204 R_PPC_ADDR16_LO);
10205 rela.r_addend = got_offset;
10206 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10207 loc += sizeof (Elf32_External_Rela);
10208
10209 /* Provide a relocation for the GOT entry corresponding to this
10210 PLT slot. Point it at the middle of the .plt entry. */
10211 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10212 + htab->elf.sgotplt->output_offset
10213 + got_offset);
10214 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10215 R_PPC_ADDR32);
10216 rela.r_addend = ent->plt.offset + 16;
10217 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10218 }
10219
10220 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10221 In particular, the offset for the relocation is not the
10222 address of the PLT entry for this function, as specified
10223 by the ABI. Instead, the offset is set to the address of
10224 the GOT slot for this function. See EABI 4.4.4.1. */
10225 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10226 + htab->elf.sgotplt->output_offset
10227 + got_offset);
10228
10229 }
10230 else
10231 {
10232 asection *splt = htab->elf.splt;
10233 if (!htab->elf.dynamic_sections_created
10234 || h->dynindx == -1)
10235 splt = htab->elf.iplt;
10236
10237 rela.r_offset = (splt->output_section->vma
10238 + splt->output_offset
10239 + ent->plt.offset);
10240 if (htab->plt_type == PLT_OLD
10241 || !htab->elf.dynamic_sections_created
10242 || h->dynindx == -1)
10243 {
10244 /* We don't need to fill in the .plt. The ppc dynamic
10245 linker will fill it in. */
10246 }
10247 else
10248 {
10249 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10250 + htab->glink->output_section->vma
10251 + htab->glink->output_offset);
10252 bfd_put_32 (output_bfd, val,
10253 splt->contents + ent->plt.offset);
10254 }
10255 }
10256
10257 /* Fill in the entry in the .rela.plt section. */
10258 rela.r_addend = 0;
10259 if (!htab->elf.dynamic_sections_created
10260 || h->dynindx == -1)
10261 {
10262 BFD_ASSERT (h->type == STT_GNU_IFUNC
10263 && h->def_regular
10264 && (h->root.type == bfd_link_hash_defined
10265 || h->root.type == bfd_link_hash_defweak));
10266 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10267 rela.r_addend = SYM_VAL (h);
10268 }
10269 else
10270 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10271
10272 if (!htab->elf.dynamic_sections_created
10273 || h->dynindx == -1)
10274 {
10275 loc = (htab->elf.irelplt->contents
10276 + (htab->elf.irelplt->reloc_count++
10277 * sizeof (Elf32_External_Rela)));
10278 htab->local_ifunc_resolver = 1;
10279 }
10280 else
10281 {
10282 loc = (htab->elf.srelplt->contents
10283 + reloc_index * sizeof (Elf32_External_Rela));
10284 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10285 htab->maybe_local_ifunc_resolver = 1;
10286 }
10287 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10288
10289 if (!h->def_regular)
10290 {
10291 /* Mark the symbol as undefined, rather than as
10292 defined in the .plt section. Leave the value if
10293 there were any relocations where pointer equality
10294 matters (this is a clue for the dynamic linker, to
10295 make function pointer comparisons work between an
10296 application and shared library), otherwise set it
10297 to zero. */
10298 sym->st_shndx = SHN_UNDEF;
10299 if (!h->pointer_equality_needed)
10300 sym->st_value = 0;
10301 else if (!h->ref_regular_nonweak)
10302 {
10303 /* This breaks function pointer comparisons, but
10304 that is better than breaking tests for a NULL
10305 function pointer. */
10306 sym->st_value = 0;
10307 }
10308 }
10309 else if (h->type == STT_GNU_IFUNC
10310 && !bfd_link_pic (info))
10311 {
10312 /* Set the value of ifunc symbols in a non-pie
10313 executable to the glink entry. This is to avoid
10314 text relocations. We can't do this for ifunc in
10315 allocate_dynrelocs, as we do for normal dynamic
10316 function symbols with plt entries, because we need
10317 to keep the original value around for the ifunc
10318 relocation. */
10319 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10320 (output_bfd, htab->glink->output_section));
10321 sym->st_value = (ent->glink_offset
10322 + htab->glink->output_offset
10323 + htab->glink->output_section->vma);
10324 }
10325 doneone = TRUE;
10326 }
10327
10328 if (htab->plt_type == PLT_NEW
10329 || !htab->elf.dynamic_sections_created
10330 || h->dynindx == -1)
10331 {
10332 unsigned char *p;
10333 asection *splt = htab->elf.splt;
10334 if (!htab->elf.dynamic_sections_created
10335 || h->dynindx == -1)
10336 splt = htab->elf.iplt;
10337
10338 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10339
10340 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10341 {
10342 bfd_put_32 (output_bfd, LWZ_11_3, p);
10343 p += 4;
10344 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10345 p += 4;
10346 bfd_put_32 (output_bfd, MR_0_3, p);
10347 p += 4;
10348 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10349 p += 4;
10350 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10351 p += 4;
10352 bfd_put_32 (output_bfd, BEQLR, p);
10353 p += 4;
10354 bfd_put_32 (output_bfd, MR_3_0, p);
10355 p += 4;
10356 bfd_put_32 (output_bfd, NOP, p);
10357 p += 4;
10358 }
10359
10360 write_glink_stub (ent, splt, p, info);
10361
10362 if (!bfd_link_pic (info))
10363 /* We only need one non-PIC glink stub. */
10364 break;
10365 }
10366 else
10367 break;
10368 }
10369
10370 if (h->needs_copy)
10371 {
10372 asection *s;
10373 Elf_Internal_Rela rela;
10374 bfd_byte *loc;
10375
10376 /* This symbols needs a copy reloc. Set it up. */
10377
10378 #ifdef DEBUG
10379 fprintf (stderr, ", copy");
10380 #endif
10381
10382 BFD_ASSERT (h->dynindx != -1);
10383
10384 if (ppc_elf_hash_entry (h)->has_sda_refs)
10385 s = htab->relsbss;
10386 else if (h->root.u.def.section == htab->elf.sdynrelro)
10387 s = htab->elf.sreldynrelro;
10388 else
10389 s = htab->elf.srelbss;
10390 BFD_ASSERT (s != NULL);
10391
10392 rela.r_offset = SYM_VAL (h);
10393 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10394 rela.r_addend = 0;
10395 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10396 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10397 }
10398
10399 #ifdef DEBUG
10400 fprintf (stderr, "\n");
10401 #endif
10402
10403 return TRUE;
10404 }
10405 \f
10406 static enum elf_reloc_type_class
10407 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10408 const asection *rel_sec,
10409 const Elf_Internal_Rela *rela)
10410 {
10411 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10412
10413 if (rel_sec == htab->elf.irelplt)
10414 return reloc_class_ifunc;
10415
10416 switch (ELF32_R_TYPE (rela->r_info))
10417 {
10418 case R_PPC_RELATIVE:
10419 return reloc_class_relative;
10420 case R_PPC_JMP_SLOT:
10421 return reloc_class_plt;
10422 case R_PPC_COPY:
10423 return reloc_class_copy;
10424 default:
10425 return reloc_class_normal;
10426 }
10427 }
10428 \f
10429 /* Finish up the dynamic sections. */
10430
10431 static bfd_boolean
10432 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10433 struct bfd_link_info *info)
10434 {
10435 asection *sdyn;
10436 struct ppc_elf_link_hash_table *htab;
10437 bfd_vma got;
10438 bfd *dynobj;
10439 bfd_boolean ret = TRUE;
10440
10441 #ifdef DEBUG
10442 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10443 #endif
10444
10445 htab = ppc_elf_hash_table (info);
10446 dynobj = htab->elf.dynobj;
10447 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10448
10449 got = 0;
10450 if (htab->elf.hgot != NULL)
10451 got = SYM_VAL (htab->elf.hgot);
10452
10453 if (htab->elf.dynamic_sections_created)
10454 {
10455 Elf32_External_Dyn *dyncon, *dynconend;
10456
10457 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10458
10459 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10460 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10461 for (; dyncon < dynconend; dyncon++)
10462 {
10463 Elf_Internal_Dyn dyn;
10464 asection *s;
10465
10466 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10467
10468 switch (dyn.d_tag)
10469 {
10470 case DT_PLTGOT:
10471 if (htab->is_vxworks)
10472 s = htab->elf.sgotplt;
10473 else
10474 s = htab->elf.splt;
10475 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10476 break;
10477
10478 case DT_PLTRELSZ:
10479 dyn.d_un.d_val = htab->elf.srelplt->size;
10480 break;
10481
10482 case DT_JMPREL:
10483 s = htab->elf.srelplt;
10484 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10485 break;
10486
10487 case DT_PPC_GOT:
10488 dyn.d_un.d_ptr = got;
10489 break;
10490
10491 case DT_TEXTREL:
10492 if (htab->local_ifunc_resolver)
10493 info->callbacks->einfo
10494 (_("%X%P: text relocations and GNU indirect "
10495 "functions will result in a segfault at runtime\n"));
10496 else if (htab->maybe_local_ifunc_resolver)
10497 info->callbacks->einfo
10498 (_("%P: warning: text relocations and GNU indirect "
10499 "functions may result in a segfault at runtime\n"));
10500 continue;
10501
10502 default:
10503 if (htab->is_vxworks
10504 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10505 break;
10506 continue;
10507 }
10508
10509 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10510 }
10511 }
10512
10513 if (htab->elf.sgot != NULL
10514 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10515 {
10516 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10517 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10518 {
10519 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10520
10521 p += htab->elf.hgot->root.u.def.value;
10522 if (htab->plt_type == PLT_OLD)
10523 {
10524 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10525 so that a function can easily find the address of
10526 _GLOBAL_OFFSET_TABLE_. */
10527 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10528 < htab->elf.hgot->root.u.def.section->size);
10529 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10530 }
10531
10532 if (sdyn != NULL)
10533 {
10534 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10535 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10536 < htab->elf.hgot->root.u.def.section->size);
10537 bfd_put_32 (output_bfd, val, p);
10538 }
10539 }
10540 else
10541 {
10542 /* xgettext:c-format */
10543 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10544 htab->elf.hgot->root.root.string,
10545 (htab->elf.sgotplt != NULL
10546 ? htab->elf.sgotplt->name
10547 : htab->elf.sgot->name));
10548 bfd_set_error (bfd_error_bad_value);
10549 ret = FALSE;
10550 }
10551
10552 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10553 }
10554
10555 /* Fill in the first entry in the VxWorks procedure linkage table. */
10556 if (htab->is_vxworks
10557 && htab->elf.splt != NULL
10558 && htab->elf.splt->size != 0
10559 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10560 {
10561 asection *splt = htab->elf.splt;
10562 /* Use the right PLT. */
10563 const bfd_vma *plt_entry = (bfd_link_pic (info)
10564 ? ppc_elf_vxworks_pic_plt0_entry
10565 : ppc_elf_vxworks_plt0_entry);
10566
10567 if (!bfd_link_pic (info))
10568 {
10569 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10570
10571 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10572 splt->contents + 0);
10573 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10574 splt->contents + 4);
10575 }
10576 else
10577 {
10578 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10579 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10580 }
10581 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10582 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10583 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10584 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10585 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10586 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10587
10588 if (! bfd_link_pic (info))
10589 {
10590 Elf_Internal_Rela rela;
10591 bfd_byte *loc;
10592
10593 loc = htab->srelplt2->contents;
10594
10595 /* Output the @ha relocation for the first instruction. */
10596 rela.r_offset = (htab->elf.splt->output_section->vma
10597 + htab->elf.splt->output_offset
10598 + 2);
10599 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10600 rela.r_addend = 0;
10601 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10602 loc += sizeof (Elf32_External_Rela);
10603
10604 /* Output the @l relocation for the second instruction. */
10605 rela.r_offset = (htab->elf.splt->output_section->vma
10606 + htab->elf.splt->output_offset
10607 + 6);
10608 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10609 rela.r_addend = 0;
10610 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10611 loc += sizeof (Elf32_External_Rela);
10612
10613 /* Fix up the remaining relocations. They may have the wrong
10614 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10615 in which symbols were output. */
10616 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10617 {
10618 Elf_Internal_Rela rel;
10619
10620 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10621 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10622 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10623 loc += sizeof (Elf32_External_Rela);
10624
10625 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10626 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10627 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10628 loc += sizeof (Elf32_External_Rela);
10629
10630 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10631 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10632 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10633 loc += sizeof (Elf32_External_Rela);
10634 }
10635 }
10636 }
10637
10638 if (htab->glink != NULL
10639 && htab->glink->contents != NULL
10640 && htab->elf.dynamic_sections_created)
10641 {
10642 unsigned char *p;
10643 unsigned char *endp;
10644 bfd_vma res0;
10645 unsigned int i;
10646
10647 /*
10648 * PIC glink code is the following:
10649 *
10650 * # ith PLT code stub.
10651 * addis 11,30,(plt+(i-1)*4-got)@ha
10652 * lwz 11,(plt+(i-1)*4-got)@l(11)
10653 * mtctr 11
10654 * bctr
10655 *
10656 * # A table of branches, one for each plt entry.
10657 * # The idea is that the plt call stub loads ctr and r11 with these
10658 * # addresses, so (r11 - res_0) gives the plt index * 4.
10659 * res_0: b PLTresolve
10660 * res_1: b PLTresolve
10661 * .
10662 * # Some number of entries towards the end can be nops
10663 * res_n_m3: nop
10664 * res_n_m2: nop
10665 * res_n_m1:
10666 *
10667 * PLTresolve:
10668 * addis 11,11,(1f-res_0)@ha
10669 * mflr 0
10670 * bcl 20,31,1f
10671 * 1: addi 11,11,(1b-res_0)@l
10672 * mflr 12
10673 * mtlr 0
10674 * sub 11,11,12 # r11 = index * 4
10675 * addis 12,12,(got+4-1b)@ha
10676 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10677 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10678 * mtctr 0
10679 * add 0,11,11
10680 * add 11,0,11 # r11 = index * 12 = reloc offset.
10681 * bctr
10682 */
10683 static const unsigned int pic_plt_resolve[] =
10684 {
10685 ADDIS_11_11,
10686 MFLR_0,
10687 BCL_20_31,
10688 ADDI_11_11,
10689 MFLR_12,
10690 MTLR_0,
10691 SUB_11_11_12,
10692 ADDIS_12_12,
10693 LWZ_0_12,
10694 LWZ_12_12,
10695 MTCTR_0,
10696 ADD_0_11_11,
10697 ADD_11_0_11,
10698 BCTR,
10699 NOP,
10700 NOP
10701 };
10702
10703 /*
10704 * Non-PIC glink code is a little simpler.
10705 *
10706 * # ith PLT code stub.
10707 * lis 11,(plt+(i-1)*4)@ha
10708 * lwz 11,(plt+(i-1)*4)@l(11)
10709 * mtctr 11
10710 * bctr
10711 *
10712 * The branch table is the same, then comes
10713 *
10714 * PLTresolve:
10715 * lis 12,(got+4)@ha
10716 * addis 11,11,(-res_0)@ha
10717 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10718 * addi 11,11,(-res_0)@l # r11 = index * 4
10719 * mtctr 0
10720 * add 0,11,11
10721 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10722 * add 11,0,11 # r11 = index * 12 = reloc offset.
10723 * bctr
10724 */
10725 static const unsigned int plt_resolve[] =
10726 {
10727 LIS_12,
10728 ADDIS_11_11,
10729 LWZ_0_12,
10730 ADDI_11_11,
10731 MTCTR_0,
10732 ADD_0_11_11,
10733 LWZ_12_12,
10734 ADD_11_0_11,
10735 BCTR,
10736 NOP,
10737 NOP,
10738 NOP,
10739 NOP,
10740 NOP,
10741 NOP,
10742 NOP
10743 };
10744
10745 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10746 abort ();
10747 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10748 abort ();
10749
10750 /* Build the branch table, one for each plt entry (less one),
10751 and perhaps some padding. */
10752 p = htab->glink->contents;
10753 p += htab->glink_pltresolve;
10754 endp = htab->glink->contents;
10755 endp += htab->glink->size - GLINK_PLTRESOLVE;
10756 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10757 {
10758 bfd_put_32 (output_bfd, B + endp - p, p);
10759 p += 4;
10760 }
10761 while (p < endp)
10762 {
10763 bfd_put_32 (output_bfd, NOP, p);
10764 p += 4;
10765 }
10766
10767 res0 = (htab->glink_pltresolve
10768 + htab->glink->output_section->vma
10769 + htab->glink->output_offset);
10770
10771 if (htab->params->ppc476_workaround)
10772 {
10773 /* Ensure that a call stub at the end of a page doesn't
10774 result in prefetch over the end of the page into the
10775 glink branch table. */
10776 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10777 bfd_vma page_addr;
10778 bfd_vma glink_start = (htab->glink->output_section->vma
10779 + htab->glink->output_offset);
10780
10781 for (page_addr = res0 & -pagesize;
10782 page_addr > glink_start;
10783 page_addr -= pagesize)
10784 {
10785 /* We have a plt call stub that may need fixing. */
10786 bfd_byte *loc;
10787 unsigned int insn;
10788
10789 loc = htab->glink->contents + page_addr - 4 - glink_start;
10790 insn = bfd_get_32 (output_bfd, loc);
10791 if (insn == BCTR)
10792 {
10793 /* By alignment, we know that there must be at least
10794 one other call stub before this one. */
10795 insn = bfd_get_32 (output_bfd, loc - 16);
10796 if (insn == BCTR)
10797 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10798 else
10799 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10800 }
10801 }
10802 }
10803
10804 /* Last comes the PLTresolve stub. */
10805 if (bfd_link_pic (info))
10806 {
10807 bfd_vma bcl;
10808
10809 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10810 {
10811 unsigned int insn = pic_plt_resolve[i];
10812
10813 if (htab->params->ppc476_workaround && insn == NOP)
10814 insn = BA + 0;
10815 bfd_put_32 (output_bfd, insn, p);
10816 p += 4;
10817 }
10818 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10819
10820 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10821 + htab->glink->output_section->vma
10822 + htab->glink->output_offset);
10823
10824 bfd_put_32 (output_bfd,
10825 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10826 bfd_put_32 (output_bfd,
10827 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10828 bfd_put_32 (output_bfd,
10829 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10830 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10831 {
10832 bfd_put_32 (output_bfd,
10833 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10834 bfd_put_32 (output_bfd,
10835 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10836 }
10837 else
10838 {
10839 bfd_put_32 (output_bfd,
10840 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10841 bfd_put_32 (output_bfd,
10842 LWZ_12_12 + 4, p + 9*4);
10843 }
10844 }
10845 else
10846 {
10847 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10848 {
10849 unsigned int insn = plt_resolve[i];
10850
10851 if (htab->params->ppc476_workaround && insn == NOP)
10852 insn = BA + 0;
10853 bfd_put_32 (output_bfd, insn, p);
10854 p += 4;
10855 }
10856 p -= 4 * ARRAY_SIZE (plt_resolve);
10857
10858 bfd_put_32 (output_bfd,
10859 LIS_12 + PPC_HA (got + 4), p + 0*4);
10860 bfd_put_32 (output_bfd,
10861 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10862 bfd_put_32 (output_bfd,
10863 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10864 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10865 {
10866 bfd_put_32 (output_bfd,
10867 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10868 bfd_put_32 (output_bfd,
10869 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10870 }
10871 else
10872 {
10873 bfd_put_32 (output_bfd,
10874 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10875 bfd_put_32 (output_bfd,
10876 LWZ_12_12 + 4, p + 6*4);
10877 }
10878 }
10879 }
10880
10881 if (htab->glink_eh_frame != NULL
10882 && htab->glink_eh_frame->contents != NULL)
10883 {
10884 unsigned char *p = htab->glink_eh_frame->contents;
10885 bfd_vma val;
10886
10887 p += sizeof (glink_eh_frame_cie);
10888 /* FDE length. */
10889 p += 4;
10890 /* CIE pointer. */
10891 p += 4;
10892 /* Offset to .glink. */
10893 val = (htab->glink->output_section->vma
10894 + htab->glink->output_offset);
10895 val -= (htab->glink_eh_frame->output_section->vma
10896 + htab->glink_eh_frame->output_offset);
10897 val -= p - htab->glink_eh_frame->contents;
10898 bfd_put_32 (htab->elf.dynobj, val, p);
10899
10900 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10901 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10902 htab->glink_eh_frame,
10903 htab->glink_eh_frame->contents))
10904 return FALSE;
10905 }
10906
10907 return ret;
10908 }
10909 \f
10910 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10911 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10912 #define TARGET_BIG_SYM powerpc_elf32_vec
10913 #define TARGET_BIG_NAME "elf32-powerpc"
10914 #define ELF_ARCH bfd_arch_powerpc
10915 #define ELF_TARGET_ID PPC32_ELF_DATA
10916 #define ELF_MACHINE_CODE EM_PPC
10917 #ifdef __QNXTARGET__
10918 #define ELF_MAXPAGESIZE 0x1000
10919 #define ELF_COMMONPAGESIZE 0x1000
10920 #else
10921 #define ELF_MAXPAGESIZE 0x10000
10922 #define ELF_COMMONPAGESIZE 0x10000
10923 #endif
10924 #define ELF_MINPAGESIZE 0x1000
10925 #define elf_info_to_howto ppc_elf_info_to_howto
10926
10927 #ifdef EM_CYGNUS_POWERPC
10928 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10929 #endif
10930
10931 #ifdef EM_PPC_OLD
10932 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10933 #endif
10934
10935 #define elf_backend_plt_not_loaded 1
10936 #define elf_backend_want_dynrelro 1
10937 #define elf_backend_can_gc_sections 1
10938 #define elf_backend_can_refcount 1
10939 #define elf_backend_rela_normal 1
10940 #define elf_backend_caches_rawsize 1
10941
10942 #define bfd_elf32_mkobject ppc_elf_mkobject
10943 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10944 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10945 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10946 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10947 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10948 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10949 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10950
10951 #define elf_backend_object_p ppc_elf_object_p
10952 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10953 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10954 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10955 #define elf_backend_relocate_section ppc_elf_relocate_section
10956 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10957 #define elf_backend_check_relocs ppc_elf_check_relocs
10958 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10959 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10960 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10961 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10962 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10963 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10964 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10965 #define elf_backend_fake_sections ppc_elf_fake_sections
10966 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10967 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10968 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10969 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10970 #define elf_backend_write_core_note ppc_elf_write_core_note
10971 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10972 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10973 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10974 #define elf_backend_write_section ppc_elf_write_section
10975 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10976 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10977 #define elf_backend_action_discarded ppc_elf_action_discarded
10978 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10979 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10980
10981 #include "elf32-target.h"
10982
10983 /* FreeBSD Target */
10984
10985 #undef TARGET_LITTLE_SYM
10986 #undef TARGET_LITTLE_NAME
10987
10988 #undef TARGET_BIG_SYM
10989 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10990 #undef TARGET_BIG_NAME
10991 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10992
10993 #undef ELF_OSABI
10994 #define ELF_OSABI ELFOSABI_FREEBSD
10995
10996 #undef elf32_bed
10997 #define elf32_bed elf32_powerpc_fbsd_bed
10998
10999 #include "elf32-target.h"
11000
11001 /* VxWorks Target */
11002
11003 #undef TARGET_LITTLE_SYM
11004 #undef TARGET_LITTLE_NAME
11005
11006 #undef TARGET_BIG_SYM
11007 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11008 #undef TARGET_BIG_NAME
11009 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11010
11011 #undef ELF_OSABI
11012
11013 /* VxWorks uses the elf default section flags for .plt. */
11014 static const struct bfd_elf_special_section *
11015 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11016 {
11017 if (sec->name == NULL)
11018 return NULL;
11019
11020 if (strcmp (sec->name, ".plt") == 0)
11021 return _bfd_elf_get_sec_type_attr (abfd, sec);
11022
11023 return ppc_elf_get_sec_type_attr (abfd, sec);
11024 }
11025
11026 /* Like ppc_elf_link_hash_table_create, but overrides
11027 appropriately for VxWorks. */
11028 static struct bfd_link_hash_table *
11029 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11030 {
11031 struct bfd_link_hash_table *ret;
11032
11033 ret = ppc_elf_link_hash_table_create (abfd);
11034 if (ret)
11035 {
11036 struct ppc_elf_link_hash_table *htab
11037 = (struct ppc_elf_link_hash_table *)ret;
11038 htab->is_vxworks = 1;
11039 htab->plt_type = PLT_VXWORKS;
11040 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11041 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11042 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11043 }
11044 return ret;
11045 }
11046
11047 /* Tweak magic VxWorks symbols as they are loaded. */
11048 static bfd_boolean
11049 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11050 struct bfd_link_info *info,
11051 Elf_Internal_Sym *sym,
11052 const char **namep,
11053 flagword *flagsp,
11054 asection **secp,
11055 bfd_vma *valp)
11056 {
11057 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11058 valp))
11059 return FALSE;
11060
11061 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11062 }
11063
11064 static void
11065 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11066 {
11067 ppc_elf_final_write_processing (abfd, linker);
11068 elf_vxworks_final_write_processing (abfd, linker);
11069 }
11070
11071 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11072 define it. */
11073 #undef elf_backend_want_plt_sym
11074 #define elf_backend_want_plt_sym 1
11075 #undef elf_backend_want_got_plt
11076 #define elf_backend_want_got_plt 1
11077 #undef elf_backend_got_symbol_offset
11078 #define elf_backend_got_symbol_offset 0
11079 #undef elf_backend_plt_not_loaded
11080 #define elf_backend_plt_not_loaded 0
11081 #undef elf_backend_plt_readonly
11082 #define elf_backend_plt_readonly 1
11083 #undef elf_backend_got_header_size
11084 #define elf_backend_got_header_size 12
11085 #undef elf_backend_dtrel_excludes_plt
11086 #define elf_backend_dtrel_excludes_plt 1
11087
11088 #undef bfd_elf32_get_synthetic_symtab
11089
11090 #undef bfd_elf32_bfd_link_hash_table_create
11091 #define bfd_elf32_bfd_link_hash_table_create \
11092 ppc_elf_vxworks_link_hash_table_create
11093 #undef elf_backend_add_symbol_hook
11094 #define elf_backend_add_symbol_hook \
11095 ppc_elf_vxworks_add_symbol_hook
11096 #undef elf_backend_link_output_symbol_hook
11097 #define elf_backend_link_output_symbol_hook \
11098 elf_vxworks_link_output_symbol_hook
11099 #undef elf_backend_final_write_processing
11100 #define elf_backend_final_write_processing \
11101 ppc_elf_vxworks_final_write_processing
11102 #undef elf_backend_get_sec_type_attr
11103 #define elf_backend_get_sec_type_attr \
11104 ppc_elf_vxworks_get_sec_type_attr
11105 #undef elf_backend_emit_relocs
11106 #define elf_backend_emit_relocs \
11107 elf_vxworks_emit_relocs
11108
11109 #undef elf32_bed
11110 #define elf32_bed ppc_elf_vxworks_bed
11111 #undef elf_backend_post_process_headers
11112
11113 #include "elf32-target.h"
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