projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* elf32-ppc.c (struct plt_entry): Revise comments.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160
161 /* The value of a defined global symbol. */
162 #define SYM_VAL(SYM) \
163 ((SYM)->root.u.def.section->output_section->vma \
164 + (SYM)->root.u.def.section->output_offset \
165 + (SYM)->root.u.def.value)
166 \f
167 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
168
169 static reloc_howto_type ppc_elf_howto_raw[] = {
170 /* This reloc does nothing. */
171 HOWTO (R_PPC_NONE, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 32, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_bitfield, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_PPC_NONE", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A standard 32 bit relocation. */
186 HOWTO (R_PPC_ADDR32, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC_ADDR32", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0xffffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* An absolute 26 bit branch; the lower two bits must be zero.
201 FIXME: we don't check that, we just clear them. */
202 HOWTO (R_PPC_ADDR24, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 26, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR24", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0x3fffffc, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* A standard 16 bit relocation. */
217 HOWTO (R_PPC_ADDR16, /* type */
218 0, /* rightshift */
219 1, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC_ADDR16", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0xffff, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A 16 bit relocation without overflow. */
232 HOWTO (R_PPC_ADDR16_LO, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_dont,/* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC_ADDR16_LO", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* The high order 16 bits of an address. */
247 HOWTO (R_PPC_ADDR16_HI, /* type */
248 16, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC_ADDR16_HI", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* The high order 16 bits of an address, plus 1 if the contents of
262 the low 16 bits, treated as a signed number, is negative. */
263 HOWTO (R_PPC_ADDR16_HA, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 ppc_elf_addr16_ha_reloc, /* special_function */
271 "R_PPC_ADDR16_HA", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* An absolute 16 bit branch; the lower two bits must be zero.
278 FIXME: we don't check that, we just clear them. */
279 HOWTO (R_PPC_ADDR14, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_bitfield, /* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC_ADDR14", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xfffc, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch, for which bit 10 should be set to
294 indicate that the branch is expected to be taken. The lower two
295 bits must be zero. */
296 HOWTO (R_PPC_ADDR14_BRTAKEN, /* 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_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14_BRTAKEN",/* 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 not expected to be taken. The lower
312 two bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* 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_bitfield, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRNTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A relative 26 bit branch; the lower two bits must be zero. */
328 HOWTO (R_PPC_REL24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 26, /* bitsize */
332 TRUE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_signed, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_PPC_REL24", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x3fffffc, /* dst_mask */
340 TRUE), /* pcrel_offset */
341
342 /* A relative 16 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC_REL14, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC_REL14", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0xfffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch. Bit 10 should be set to indicate that
358 the branch is expected to be taken. The lower two bits must be
359 zero. */
360 HOWTO (R_PPC_REL14_BRTAKEN, /* 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_BRTAKEN", /* 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 not expected to be taken. The lower two bits must
376 be zero. */
377 HOWTO (R_PPC_REL14_BRNTAKEN, /* 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_BRNTAKEN",/* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
392 symbol. */
393 HOWTO (R_PPC_GOT16, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_GOT16", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
408 the symbol. */
409 HOWTO (R_PPC_GOT16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_bitfield, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_GOT16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_REL24, but referring to the procedure linkage table
456 entry for the symbol. */
457 HOWTO (R_PPC_PLTREL24, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 26, /* bitsize */
461 TRUE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_PLTREL24", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0x3fffffc, /* dst_mask */
469 TRUE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC_COPY, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 32, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC_ADDR32, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC_GLOB_DAT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Marks a procedure linkage table entry for a symbol. */
507 HOWTO (R_PPC_JMP_SLOT, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 longword is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC_RELATIVE, /* 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_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC_REL24, but uses the value of the symbol within the
539 object rather than the final value. Normally used for
540 _GLOBAL_OFFSET_TABLE_. */
541 HOWTO (R_PPC_LOCAL24PC, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 26, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_signed, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_LOCAL24PC", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0x3fffffc, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 /* Like R_PPC_ADDR32, but may be unaligned. */
556 HOWTO (R_PPC_UADDR32, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 32, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_UADDR32", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffffffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but may be unaligned. */
571 HOWTO (R_PPC_UADDR16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_UADDR16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* 32-bit PC relative */
586 HOWTO (R_PPC_REL32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* 32-bit relocation to the symbol's procedure linkage table.
601 FIXME: not supported. */
602 HOWTO (R_PPC_PLT32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_PLT32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLTREL32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 TRUE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLTREL32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 TRUE), /* pcrel_offset */
631
632 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC_PLT16_LO, /* type */
635 0, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLT16_LO", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_HI, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_bitfield, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_HI", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HA, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc_elf_addr16_ha_reloc, /* special_function */
674 "R_PPC_PLT16_HA", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
681 small data items. */
682 HOWTO (R_PPC_SDAREL16, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_signed, /* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_PPC_SDAREL16", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_PPC_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit lower half section relative relocation. */
712 HOWTO (R_PPC_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_PPC_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_bitfield, /* complain_on_overflow */
749 ppc_elf_addr16_ha_reloc, /* special_function */
750 "R_PPC_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Marker relocs for TLS. */
757 HOWTO (R_PPC_TLS,
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 32, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC_TLS", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 HOWTO (R_PPC_TLSGD,
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 32, /* bitsize */
775 FALSE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 bfd_elf_generic_reloc, /* special_function */
779 "R_PPC_TLSGD", /* name */
780 FALSE, /* partial_inplace */
781 0, /* src_mask */
782 0, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 HOWTO (R_PPC_TLSLD,
786 0, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 32, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC_TLSLD", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* Computes the load module index of the load module that contains the
800 definition of its TLS sym. */
801 HOWTO (R_PPC_DTPMOD32,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_DTPMOD32", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0xffffffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes a dtv-relative displacement, the difference between the value
816 of sym+add and the base address of the thread-local storage block that
817 contains the definition of sym, minus 0x8000. */
818 HOWTO (R_PPC_DTPREL32,
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_DTPREL32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* A 16 bit dtprel reloc. */
833 HOWTO (R_PPC_DTPREL16,
834 0, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_signed, /* complain_on_overflow */
840 ppc_elf_unhandled_reloc, /* special_function */
841 "R_PPC_DTPREL16", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* Like DTPREL16, but no overflow. */
848 HOWTO (R_PPC_DTPREL16_LO,
849 0, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_DTPREL16_LO", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* Like DTPREL16_LO, but next higher group of 16 bits. */
863 HOWTO (R_PPC_DTPREL16_HI,
864 16, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_DTPREL16_HI", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* Like DTPREL16_HI, but adjust for low 16 bits. */
878 HOWTO (R_PPC_DTPREL16_HA,
879 16, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_DTPREL16_HA", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* Computes a tp-relative displacement, the difference between the value of
893 sym+add and the value of the thread pointer (r13). */
894 HOWTO (R_PPC_TPREL32,
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 32, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_TPREL32", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffffffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* A 16 bit tprel reloc. */
909 HOWTO (R_PPC_TPREL16,
910 0, /* rightshift */
911 1, /* size (0 = byte, 1 = short, 2 = long) */
912 16, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_signed, /* complain_on_overflow */
916 ppc_elf_unhandled_reloc, /* special_function */
917 "R_PPC_TPREL16", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 0xffff, /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* Like TPREL16, but no overflow. */
924 HOWTO (R_PPC_TPREL16_LO,
925 0, /* rightshift */
926 1, /* size (0 = byte, 1 = short, 2 = long) */
927 16, /* bitsize */
928 FALSE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc_elf_unhandled_reloc, /* special_function */
932 "R_PPC_TPREL16_LO", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 0xffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
937
938 /* Like TPREL16_LO, but next higher group of 16 bits. */
939 HOWTO (R_PPC_TPREL16_HI,
940 16, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc_elf_unhandled_reloc, /* special_function */
947 "R_PPC_TPREL16_HI", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* Like TPREL16_HI, but adjust for low 16 bits. */
954 HOWTO (R_PPC_TPREL16_HA,
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc_elf_unhandled_reloc, /* special_function */
962 "R_PPC_TPREL16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
969 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
970 to the first entry. */
971 HOWTO (R_PPC_GOT_TLSGD16,
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_TLSGD16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like GOT_TLSGD16, but no overflow. */
986 HOWTO (R_PPC_GOT_TLSGD16_LO,
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_TLSGD16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_TLSGD16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_TLSGD16_HI", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_TLSGD16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_TLSGD16_HA", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1031 with values (sym+add)@dtpmod and zero, and computes the offset to the
1032 first entry. */
1033 HOWTO (R_PPC_GOT_TLSLD16,
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_signed, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSLD16", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like GOT_TLSLD16, but no overflow. */
1048 HOWTO (R_PPC_GOT_TLSLD16_LO,
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 FALSE, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc_elf_unhandled_reloc, /* special_function */
1056 "R_PPC_GOT_TLSLD16_LO", /* name */
1057 FALSE, /* partial_inplace */
1058 0, /* src_mask */
1059 0xffff, /* dst_mask */
1060 FALSE), /* pcrel_offset */
1061
1062 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1063 HOWTO (R_PPC_GOT_TLSLD16_HI,
1064 16, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc_elf_unhandled_reloc, /* special_function */
1071 "R_PPC_GOT_TLSLD16_HI", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1078 HOWTO (R_PPC_GOT_TLSLD16_HA,
1079 16, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc_elf_unhandled_reloc, /* special_function */
1086 "R_PPC_GOT_TLSLD16_HA", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1093 the offset to the entry. */
1094 HOWTO (R_PPC_GOT_DTPREL16,
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_DTPREL16", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like GOT_DTPREL16, but no overflow. */
1109 HOWTO (R_PPC_GOT_DTPREL16_LO,
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc_elf_unhandled_reloc, /* special_function */
1117 "R_PPC_GOT_DTPREL16_LO", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xffff, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1124 HOWTO (R_PPC_GOT_DTPREL16_HI,
1125 16, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 ppc_elf_unhandled_reloc, /* special_function */
1132 "R_PPC_GOT_DTPREL16_HI", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xffff, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1139 HOWTO (R_PPC_GOT_DTPREL16_HA,
1140 16, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 ppc_elf_unhandled_reloc, /* special_function */
1147 "R_PPC_GOT_DTPREL16_HA", /* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xffff, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1154 offset to the entry. */
1155 HOWTO (R_PPC_GOT_TPREL16,
1156 0, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_signed, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_TPREL16", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Like GOT_TPREL16, but no overflow. */
1170 HOWTO (R_PPC_GOT_TPREL16_LO,
1171 0, /* rightshift */
1172 1, /* size (0 = byte, 1 = short, 2 = long) */
1173 16, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 ppc_elf_unhandled_reloc, /* special_function */
1178 "R_PPC_GOT_TPREL16_LO", /* name */
1179 FALSE, /* partial_inplace */
1180 0, /* src_mask */
1181 0xffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1185 HOWTO (R_PPC_GOT_TPREL16_HI,
1186 16, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_dont, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TPREL16_HI", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1200 HOWTO (R_PPC_GOT_TPREL16_HA,
1201 16, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TPREL16_HA", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* The remaining relocs are from the Embedded ELF ABI, and are not
1215 in the SVR4 ELF ABI. */
1216
1217 /* 32 bit value resulting from the addend minus the symbol. */
1218 HOWTO (R_PPC_EMB_NADDR32, /* type */
1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_bitfield, /* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
1226 "R_PPC_EMB_NADDR32", /* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* 16 bit value resulting from the addend minus the symbol. */
1233 HOWTO (R_PPC_EMB_NADDR16, /* type */
1234 0, /* rightshift */
1235 1, /* size (0 = byte, 1 = short, 2 = long) */
1236 16, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_bitfield, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC_EMB_NADDR16", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0xffff, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* 16 bit value resulting from the addend minus the symbol. */
1248 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_dont,/* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_ADDR16_LO", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* The high order 16 bits of the addend minus the symbol. */
1263 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1264 16, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_NADDR16_HI", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* The high order 16 bits of the result of the addend minus the address,
1278 plus 1 if the contents of the low 16 bits, treated as a signed number,
1279 is negative. */
1280 HOWTO (R_PPC_EMB_NADDR16_HA, /* 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_addr16_ha_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HA", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* 16 bit value resulting from allocating a 4 byte word to hold an
1295 address in the .sdata section, and returning the offset from
1296 _SDA_BASE_ for that relocation. */
1297 HOWTO (R_PPC_EMB_SDAI16, /* type */
1298 0, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_bitfield, /* complain_on_overflow */
1304 bfd_elf_generic_reloc, /* special_function */
1305 "R_PPC_EMB_SDAI16", /* 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 .sdata2 section, and returning the offset from
1313 _SDA2_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDA2I16, /* 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_bitfield, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDA2I16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1329 small data items. */
1330 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 bfd_elf_generic_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2REL", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1345 signed offset from the appropriate base, and filling in the register
1346 field with the appropriate register (0, 2, or 13). */
1347 HOWTO (R_PPC_EMB_SDA21, /* type */
1348 0, /* rightshift */
1349 2, /* 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 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA21", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocation not handled: R_PPC_EMB_MRKREF */
1362 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1363 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1364 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1365 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1366 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1367
1368 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1369 in the 16 bit signed offset from the appropriate base, and filling in the
1370 register field with the appropriate register (0, 2, or 13). */
1371 HOWTO (R_PPC_EMB_RELSDA, /* type */
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 TRUE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_signed, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC_EMB_RELSDA", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 HOWTO (R_PPC_IRELATIVE, /* type */
1386 0, /* rightshift */
1387 2, /* size (0 = byte, 1 = short, 2 = long) */
1388 32, /* bitsize */
1389 FALSE, /* pc_relative */
1390 0, /* bitpos */
1391 complain_overflow_bitfield, /* complain_on_overflow */
1392 bfd_elf_generic_reloc, /* special_function */
1393 "R_PPC_IRELATIVE", /* name */
1394 FALSE, /* partial_inplace */
1395 0, /* src_mask */
1396 0xffffffff, /* dst_mask */
1397 FALSE), /* pcrel_offset */
1398
1399 /* A 16 bit relative relocation. */
1400 HOWTO (R_PPC_REL16, /* type */
1401 0, /* rightshift */
1402 1, /* size (0 = byte, 1 = short, 2 = long) */
1403 16, /* bitsize */
1404 TRUE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_bitfield, /* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 "R_PPC_REL16", /* name */
1409 FALSE, /* partial_inplace */
1410 0, /* src_mask */
1411 0xffff, /* dst_mask */
1412 TRUE), /* pcrel_offset */
1413
1414 /* A 16 bit relative relocation without overflow. */
1415 HOWTO (R_PPC_REL16_LO, /* type */
1416 0, /* rightshift */
1417 1, /* size (0 = byte, 1 = short, 2 = long) */
1418 16, /* bitsize */
1419 TRUE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_PPC_REL16_LO", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 0xffff, /* dst_mask */
1427 TRUE), /* pcrel_offset */
1428
1429 /* The high order 16 bits of a relative address. */
1430 HOWTO (R_PPC_REL16_HI, /* type */
1431 16, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 TRUE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 bfd_elf_generic_reloc, /* special_function */
1438 "R_PPC_REL16_HI", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 TRUE), /* pcrel_offset */
1443
1444 /* The high order 16 bits of a relative address, plus 1 if the contents of
1445 the low 16 bits, treated as a signed number, is negative. */
1446 HOWTO (R_PPC_REL16_HA, /* type */
1447 16, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 TRUE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc_elf_addr16_ha_reloc, /* special_function */
1454 "R_PPC_REL16_HA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 TRUE), /* pcrel_offset */
1459
1460 /* GNU extension to record C++ vtable hierarchy. */
1461 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1462 0, /* rightshift */
1463 0, /* size (0 = byte, 1 = short, 2 = long) */
1464 0, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 NULL, /* special_function */
1469 "R_PPC_GNU_VTINHERIT", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* GNU extension to record C++ vtable member usage. */
1476 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1477 0, /* rightshift */
1478 0, /* size (0 = byte, 1 = short, 2 = long) */
1479 0, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 NULL, /* special_function */
1484 "R_PPC_GNU_VTENTRY", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Phony reloc to handle AIX style TOC entries. */
1491 HOWTO (R_PPC_TOC16, /* type */
1492 0, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_signed, /* complain_on_overflow */
1498 bfd_elf_generic_reloc, /* special_function */
1499 "R_PPC_TOC16", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xffff, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504 };
1505 \f
1506 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1507
1508 static void
1509 ppc_elf_howto_init (void)
1510 {
1511 unsigned int i, type;
1512
1513 for (i = 0;
1514 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1515 i++)
1516 {
1517 type = ppc_elf_howto_raw[i].type;
1518 if (type >= (sizeof (ppc_elf_howto_table)
1519 / sizeof (ppc_elf_howto_table[0])))
1520 abort ();
1521 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1522 }
1523 }
1524
1525 static reloc_howto_type *
1526 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1527 bfd_reloc_code_real_type code)
1528 {
1529 enum elf_ppc_reloc_type r;
1530
1531 /* Initialize howto table if not already done. */
1532 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1533 ppc_elf_howto_init ();
1534
1535 switch (code)
1536 {
1537 default:
1538 return NULL;
1539
1540 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1541 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1542 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1543 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1544 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1545 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1546 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1547 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1548 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1549 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1550 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1551 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1552 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1553 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1554 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1555 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1556 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1557 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1558 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1559 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1560 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1561 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1562 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1563 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1564 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1565 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1566 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1567 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1568 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1569 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1570 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1571 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1572 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1573 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1574 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1575 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1576 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1577 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1578 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1579 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1580 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1581 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1582 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1583 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1584 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1585 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1586 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1587 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1588 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1589 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1590 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1591 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1592 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1593 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1594 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1595 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1596 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1597 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1598 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1599 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1600 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1601 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1602 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1603 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1604 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1605 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1606 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1607 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1608 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1609 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1610 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1611 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1612 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1613 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1614 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1615 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1616 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1617 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1618 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1619 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1620 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1621 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1622 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1623 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1624 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1625 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1626 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1627 }
1628
1629 return ppc_elf_howto_table[r];
1630 };
1631
1632 static reloc_howto_type *
1633 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1634 const char *r_name)
1635 {
1636 unsigned int i;
1637
1638 for (i = 0;
1639 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1640 i++)
1641 if (ppc_elf_howto_raw[i].name != NULL
1642 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1643 return &ppc_elf_howto_raw[i];
1644
1645 return NULL;
1646 }
1647
1648 /* Set the howto pointer for a PowerPC ELF reloc. */
1649
1650 static void
1651 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1652 arelent *cache_ptr,
1653 Elf_Internal_Rela *dst)
1654 {
1655 /* Initialize howto table if not already done. */
1656 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1657 ppc_elf_howto_init ();
1658
1659 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1660 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1661
1662 /* Just because the above assert didn't trigger doesn't mean that
1663 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1664 if (!cache_ptr->howto)
1665 {
1666 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1667 abfd, ELF32_R_TYPE (dst->r_info));
1668 bfd_set_error (bfd_error_bad_value);
1669
1670 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1671 }
1672 }
1673
1674 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1675
1676 static bfd_reloc_status_type
1677 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1678 arelent *reloc_entry,
1679 asymbol *symbol,
1680 void *data ATTRIBUTE_UNUSED,
1681 asection *input_section,
1682 bfd *output_bfd,
1683 char **error_message ATTRIBUTE_UNUSED)
1684 {
1685 bfd_vma relocation;
1686
1687 if (output_bfd != NULL)
1688 {
1689 reloc_entry->address += input_section->output_offset;
1690 return bfd_reloc_ok;
1691 }
1692
1693 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1694 return bfd_reloc_outofrange;
1695
1696 if (bfd_is_com_section (symbol->section))
1697 relocation = 0;
1698 else
1699 relocation = symbol->value;
1700
1701 relocation += symbol->section->output_section->vma;
1702 relocation += symbol->section->output_offset;
1703 relocation += reloc_entry->addend;
1704 if (reloc_entry->howto->pc_relative)
1705 relocation -= reloc_entry->address;
1706
1707 reloc_entry->addend += (relocation & 0x8000) << 1;
1708
1709 return bfd_reloc_continue;
1710 }
1711
1712 static bfd_reloc_status_type
1713 ppc_elf_unhandled_reloc (bfd *abfd,
1714 arelent *reloc_entry,
1715 asymbol *symbol,
1716 void *data,
1717 asection *input_section,
1718 bfd *output_bfd,
1719 char **error_message)
1720 {
1721 /* If this is a relocatable link (output_bfd test tells us), just
1722 call the generic function. Any adjustment will be done at final
1723 link time. */
1724 if (output_bfd != NULL)
1725 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1726 input_section, output_bfd, error_message);
1727
1728 if (error_message != NULL)
1729 {
1730 static char buf[60];
1731 sprintf (buf, _("generic linker can't handle %s"),
1732 reloc_entry->howto->name);
1733 *error_message = buf;
1734 }
1735 return bfd_reloc_dangerous;
1736 }
1737 \f
1738 /* Sections created by the linker. */
1739
1740 typedef struct elf_linker_section
1741 {
1742 /* Pointer to the bfd section. */
1743 asection *section;
1744 /* Section name. */
1745 const char *name;
1746 /* Associated bss section name. */
1747 const char *bss_name;
1748 /* Associated symbol name. */
1749 const char *sym_name;
1750 /* Associated symbol. */
1751 struct elf_link_hash_entry *sym;
1752 } elf_linker_section_t;
1753
1754 /* Linked list of allocated pointer entries. This hangs off of the
1755 symbol lists, and provides allows us to return different pointers,
1756 based on different addend's. */
1757
1758 typedef struct elf_linker_section_pointers
1759 {
1760 /* next allocated pointer for this symbol */
1761 struct elf_linker_section_pointers *next;
1762 /* offset of pointer from beginning of section */
1763 bfd_vma offset;
1764 /* addend used */
1765 bfd_vma addend;
1766 /* which linker section this is */
1767 elf_linker_section_t *lsect;
1768 } elf_linker_section_pointers_t;
1769
1770 struct ppc_elf_obj_tdata
1771 {
1772 struct elf_obj_tdata elf;
1773
1774 /* A mapping from local symbols to offsets into the various linker
1775 sections added. This is index by the symbol index. */
1776 elf_linker_section_pointers_t **linker_section_pointers;
1777
1778 /* Flags used to auto-detect plt type. */
1779 unsigned int makes_plt_call : 1;
1780 unsigned int has_rel16 : 1;
1781 };
1782
1783 #define ppc_elf_tdata(bfd) \
1784 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1785
1786 #define elf_local_ptr_offsets(bfd) \
1787 (ppc_elf_tdata (bfd)->linker_section_pointers)
1788
1789 #define is_ppc_elf(bfd) \
1790 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1791 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1792
1793 /* Override the generic function because we store some extras. */
1794
1795 static bfd_boolean
1796 ppc_elf_mkobject (bfd *abfd)
1797 {
1798 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1799 PPC32_ELF_TDATA);
1800 }
1801
1802 /* Fix bad default arch selected for a 32 bit input bfd when the
1803 default is 64 bit. */
1804
1805 static bfd_boolean
1806 ppc_elf_object_p (bfd *abfd)
1807 {
1808 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1809 {
1810 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1811
1812 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1813 {
1814 /* Relies on arch after 64 bit default being 32 bit default. */
1815 abfd->arch_info = abfd->arch_info->next;
1816 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1817 }
1818 }
1819 return TRUE;
1820 }
1821
1822 /* Function to set whether a module needs the -mrelocatable bit set. */
1823
1824 static bfd_boolean
1825 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1826 {
1827 BFD_ASSERT (!elf_flags_init (abfd)
1828 || elf_elfheader (abfd)->e_flags == flags);
1829
1830 elf_elfheader (abfd)->e_flags = flags;
1831 elf_flags_init (abfd) = TRUE;
1832 return TRUE;
1833 }
1834
1835 /* Support for core dump NOTE sections. */
1836
1837 static bfd_boolean
1838 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1839 {
1840 int offset;
1841 unsigned int size;
1842
1843 switch (note->descsz)
1844 {
1845 default:
1846 return FALSE;
1847
1848 case 268: /* Linux/PPC. */
1849 /* pr_cursig */
1850 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1851
1852 /* pr_pid */
1853 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1854
1855 /* pr_reg */
1856 offset = 72;
1857 size = 192;
1858
1859 break;
1860 }
1861
1862 /* Make a ".reg/999" section. */
1863 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1864 size, note->descpos + offset);
1865 }
1866
1867 static bfd_boolean
1868 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1869 {
1870 switch (note->descsz)
1871 {
1872 default:
1873 return FALSE;
1874
1875 case 128: /* Linux/PPC elf_prpsinfo. */
1876 elf_tdata (abfd)->core_program
1877 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1878 elf_tdata (abfd)->core_command
1879 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1880 }
1881
1882 /* Note that for some reason, a spurious space is tacked
1883 onto the end of the args in some (at least one anyway)
1884 implementations, so strip it off if it exists. */
1885
1886 {
1887 char *command = elf_tdata (abfd)->core_command;
1888 int n = strlen (command);
1889
1890 if (0 < n && command[n - 1] == ' ')
1891 command[n - 1] = '\0';
1892 }
1893
1894 return TRUE;
1895 }
1896
1897 static char *
1898 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1899 {
1900 switch (note_type)
1901 {
1902 default:
1903 return NULL;
1904
1905 case NT_PRPSINFO:
1906 {
1907 char data[128];
1908 va_list ap;
1909
1910 va_start (ap, note_type);
1911 memset (data, 0, 32);
1912 strncpy (data + 32, va_arg (ap, const char *), 16);
1913 strncpy (data + 48, va_arg (ap, const char *), 80);
1914 va_end (ap);
1915 return elfcore_write_note (abfd, buf, bufsiz,
1916 "CORE", note_type, data, sizeof (data));
1917 }
1918
1919 case NT_PRSTATUS:
1920 {
1921 char data[268];
1922 va_list ap;
1923 long pid;
1924 int cursig;
1925 const void *greg;
1926
1927 va_start (ap, note_type);
1928 memset (data, 0, 72);
1929 pid = va_arg (ap, long);
1930 bfd_put_32 (abfd, pid, data + 24);
1931 cursig = va_arg (ap, int);
1932 bfd_put_16 (abfd, cursig, data + 12);
1933 greg = va_arg (ap, const void *);
1934 memcpy (data + 72, greg, 192);
1935 memset (data + 264, 0, 4);
1936 va_end (ap);
1937 return elfcore_write_note (abfd, buf, bufsiz,
1938 "CORE", note_type, data, sizeof (data));
1939 }
1940 }
1941 }
1942
1943 /* Return address for Ith PLT stub in section PLT, for relocation REL
1944 or (bfd_vma) -1 if it should not be included. */
1945
1946 static bfd_vma
1947 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1948 const asection *plt ATTRIBUTE_UNUSED,
1949 const arelent *rel)
1950 {
1951 return rel->address;
1952 }
1953
1954 /* Handle a PowerPC specific section when reading an object file. This
1955 is called when bfd_section_from_shdr finds a section with an unknown
1956 type. */
1957
1958 static bfd_boolean
1959 ppc_elf_section_from_shdr (bfd *abfd,
1960 Elf_Internal_Shdr *hdr,
1961 const char *name,
1962 int shindex)
1963 {
1964 asection *newsect;
1965 flagword flags;
1966
1967 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1968 return FALSE;
1969
1970 newsect = hdr->bfd_section;
1971 flags = bfd_get_section_flags (abfd, newsect);
1972 if (hdr->sh_flags & SHF_EXCLUDE)
1973 flags |= SEC_EXCLUDE;
1974
1975 if (hdr->sh_type == SHT_ORDERED)
1976 flags |= SEC_SORT_ENTRIES;
1977
1978 bfd_set_section_flags (abfd, newsect, flags);
1979 return TRUE;
1980 }
1981
1982 /* Set up any other section flags and such that may be necessary. */
1983
1984 static bfd_boolean
1985 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1986 Elf_Internal_Shdr *shdr,
1987 asection *asect)
1988 {
1989 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1990 shdr->sh_flags |= SHF_EXCLUDE;
1991
1992 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1993 shdr->sh_type = SHT_ORDERED;
1994
1995 return TRUE;
1996 }
1997
1998 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1999 need to bump up the number of section headers. */
2000
2001 static int
2002 ppc_elf_additional_program_headers (bfd *abfd,
2003 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2004 {
2005 asection *s;
2006 int ret = 0;
2007
2008 s = bfd_get_section_by_name (abfd, ".sbss2");
2009 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2010 ++ret;
2011
2012 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2013 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2014 ++ret;
2015
2016 return ret;
2017 }
2018
2019 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2020 .PPC.EMB.sbss0 a normal section, and not a bss section so
2021 that the linker doesn't crater when trying to make more than
2022 2 sections. */
2023
2024 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2025 {
2026 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2027 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2028 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2029 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2030 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2031 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2032 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2033 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2034 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2035 { NULL, 0, 0, 0, 0 }
2036 };
2037
2038 /* This is what we want for new plt/got. */
2039 static struct bfd_elf_special_section ppc_alt_plt =
2040 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2041
2042 static const struct bfd_elf_special_section *
2043 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2044 {
2045 const struct bfd_elf_special_section *ssect;
2046
2047 /* See if this is one of the special sections. */
2048 if (sec->name == NULL)
2049 return NULL;
2050
2051 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2052 sec->use_rela_p);
2053 if (ssect != NULL)
2054 {
2055 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2056 ssect = &ppc_alt_plt;
2057 return ssect;
2058 }
2059
2060 return _bfd_elf_get_sec_type_attr (abfd, sec);
2061 }
2062 \f
2063 /* Very simple linked list structure for recording apuinfo values. */
2064 typedef struct apuinfo_list
2065 {
2066 struct apuinfo_list *next;
2067 unsigned long value;
2068 }
2069 apuinfo_list;
2070
2071 static apuinfo_list *head;
2072
2073
2074 static void
2075 apuinfo_list_init (void)
2076 {
2077 head = NULL;
2078 }
2079
2080 static void
2081 apuinfo_list_add (unsigned long value)
2082 {
2083 apuinfo_list *entry = head;
2084
2085 while (entry != NULL)
2086 {
2087 if (entry->value == value)
2088 return;
2089 entry = entry->next;
2090 }
2091
2092 entry = bfd_malloc (sizeof (* entry));
2093 if (entry == NULL)
2094 return;
2095
2096 entry->value = value;
2097 entry->next = head;
2098 head = entry;
2099 }
2100
2101 static unsigned
2102 apuinfo_list_length (void)
2103 {
2104 apuinfo_list *entry;
2105 unsigned long count;
2106
2107 for (entry = head, count = 0;
2108 entry;
2109 entry = entry->next)
2110 ++ count;
2111
2112 return count;
2113 }
2114
2115 static inline unsigned long
2116 apuinfo_list_element (unsigned long number)
2117 {
2118 apuinfo_list * entry;
2119
2120 for (entry = head;
2121 entry && number --;
2122 entry = entry->next)
2123 ;
2124
2125 return entry ? entry->value : 0;
2126 }
2127
2128 static void
2129 apuinfo_list_finish (void)
2130 {
2131 apuinfo_list *entry;
2132
2133 for (entry = head; entry;)
2134 {
2135 apuinfo_list *next = entry->next;
2136 free (entry);
2137 entry = next;
2138 }
2139
2140 head = NULL;
2141 }
2142
2143 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2144 #define APUINFO_LABEL "APUinfo"
2145
2146 /* Scan the input BFDs and create a linked list of
2147 the APUinfo values that will need to be emitted. */
2148
2149 static void
2150 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2151 {
2152 bfd *ibfd;
2153 asection *asec;
2154 char *buffer;
2155 unsigned num_input_sections;
2156 bfd_size_type output_section_size;
2157 unsigned i;
2158 unsigned num_entries;
2159 unsigned long offset;
2160 unsigned long length;
2161 const char *error_message = NULL;
2162
2163 if (link_info == NULL)
2164 return;
2165
2166 /* Scan the input bfds, looking for apuinfo sections. */
2167 num_input_sections = 0;
2168 output_section_size = 0;
2169
2170 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2171 {
2172 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2173 if (asec)
2174 {
2175 ++ num_input_sections;
2176 output_section_size += asec->size;
2177 }
2178 }
2179
2180 /* We need at least one input sections
2181 in order to make merging worthwhile. */
2182 if (num_input_sections < 1)
2183 return;
2184
2185 /* Just make sure that the output section exists as well. */
2186 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2187 if (asec == NULL)
2188 return;
2189
2190 /* Allocate a buffer for the contents of the input sections. */
2191 buffer = bfd_malloc (output_section_size);
2192 if (buffer == NULL)
2193 return;
2194
2195 offset = 0;
2196 apuinfo_list_init ();
2197
2198 /* Read in the input sections contents. */
2199 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2200 {
2201 unsigned long datum;
2202 char *ptr;
2203
2204 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2205 if (asec == NULL)
2206 continue;
2207
2208 length = asec->size;
2209 if (length < 24)
2210 {
2211 error_message = _("corrupt or empty %s section in %B");
2212 goto fail;
2213 }
2214
2215 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2216 || (bfd_bread (buffer + offset, length, ibfd) != length))
2217 {
2218 error_message = _("unable to read in %s section from %B");
2219 goto fail;
2220 }
2221
2222 /* Process the contents of the section. */
2223 ptr = buffer + offset;
2224 error_message = _("corrupt %s section in %B");
2225
2226 /* Verify the contents of the header. Note - we have to
2227 extract the values this way in order to allow for a
2228 host whose endian-ness is different from the target. */
2229 datum = bfd_get_32 (ibfd, ptr);
2230 if (datum != sizeof APUINFO_LABEL)
2231 goto fail;
2232
2233 datum = bfd_get_32 (ibfd, ptr + 8);
2234 if (datum != 0x2)
2235 goto fail;
2236
2237 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2238 goto fail;
2239
2240 /* Get the number of bytes used for apuinfo entries. */
2241 datum = bfd_get_32 (ibfd, ptr + 4);
2242 if (datum + 20 != length)
2243 goto fail;
2244
2245 /* Make sure that we do not run off the end of the section. */
2246 if (offset + length > output_section_size)
2247 goto fail;
2248
2249 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2250 for (i = 0; i < datum; i += 4)
2251 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2252
2253 /* Update the offset. */
2254 offset += length;
2255 }
2256
2257 error_message = NULL;
2258
2259 /* Compute the size of the output section. */
2260 num_entries = apuinfo_list_length ();
2261 output_section_size = 20 + num_entries * 4;
2262
2263 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2264
2265 if (! bfd_set_section_size (abfd, asec, output_section_size))
2266 ibfd = abfd,
2267 error_message = _("warning: unable to set size of %s section in %B");
2268
2269 fail:
2270 free (buffer);
2271
2272 if (error_message)
2273 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2274 }
2275
2276 /* Prevent the output section from accumulating the input sections'
2277 contents. We have already stored this in our linked list structure. */
2278
2279 static bfd_boolean
2280 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2281 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2282 asection *asec,
2283 bfd_byte *contents ATTRIBUTE_UNUSED)
2284 {
2285 return (apuinfo_list_length ()
2286 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2287 }
2288
2289 /* Finally we can generate the output section. */
2290
2291 static void
2292 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2293 {
2294 bfd_byte *buffer;
2295 asection *asec;
2296 unsigned i;
2297 unsigned num_entries;
2298 bfd_size_type length;
2299
2300 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2301 if (asec == NULL)
2302 return;
2303
2304 if (apuinfo_list_length () == 0)
2305 return;
2306
2307 length = asec->size;
2308 if (length < 20)
2309 return;
2310
2311 buffer = bfd_malloc (length);
2312 if (buffer == NULL)
2313 {
2314 (*_bfd_error_handler)
2315 (_("failed to allocate space for new APUinfo section."));
2316 return;
2317 }
2318
2319 /* Create the apuinfo header. */
2320 num_entries = apuinfo_list_length ();
2321 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2322 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2323 bfd_put_32 (abfd, 0x2, buffer + 8);
2324 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2325
2326 length = 20;
2327 for (i = 0; i < num_entries; i++)
2328 {
2329 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2330 length += 4;
2331 }
2332
2333 if (length != asec->size)
2334 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2335
2336 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2337 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2338
2339 free (buffer);
2340
2341 apuinfo_list_finish ();
2342 }
2343 \f
2344 static bfd_boolean
2345 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2346 {
2347 bfd_byte buf[GLINK_ENTRY_SIZE];
2348
2349 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2350 return FALSE;
2351
2352 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2353 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2354 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2355 && bfd_get_32 (abfd, buf + 12) == BCTR);
2356 }
2357
2358 static bfd_boolean
2359 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2360 {
2361 bfd_vma vma = *(bfd_vma *) ptr;
2362 return ((section->flags & SEC_ALLOC) != 0
2363 && section->vma <= vma
2364 && vma < section->vma + section->size);
2365 }
2366
2367 static long
2368 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2369 long dynsymcount, asymbol **dynsyms,
2370 asymbol **ret)
2371 {
2372 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2373 asection *plt, *relplt, *dynamic, *glink;
2374 bfd_vma glink_vma = 0;
2375 bfd_vma resolv_vma = 0;
2376 bfd_vma stub_vma;
2377 asymbol *s;
2378 arelent *p;
2379 long count, i;
2380 size_t size;
2381 char *names;
2382 bfd_byte buf[4];
2383
2384 *ret = NULL;
2385
2386 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2387 return 0;
2388
2389 if (dynsymcount <= 0)
2390 return 0;
2391
2392 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2393 if (relplt == NULL)
2394 return 0;
2395
2396 plt = bfd_get_section_by_name (abfd, ".plt");
2397 if (plt == NULL)
2398 return 0;
2399
2400 /* Call common code to handle old-style executable PLTs. */
2401 if (elf_section_flags (plt) & SHF_EXECINSTR)
2402 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2403 dynsymcount, dynsyms, ret);
2404
2405 /* If this object was prelinked, the prelinker stored the address
2406 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2407 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2408 if (dynamic != NULL)
2409 {
2410 bfd_byte *dynbuf, *extdyn, *extdynend;
2411 size_t extdynsize;
2412 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2413
2414 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2415 return -1;
2416
2417 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2418 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2419
2420 extdyn = dynbuf;
2421 extdynend = extdyn + dynamic->size;
2422 for (; extdyn < extdynend; extdyn += extdynsize)
2423 {
2424 Elf_Internal_Dyn dyn;
2425 (*swap_dyn_in) (abfd, extdyn, &dyn);
2426
2427 if (dyn.d_tag == DT_NULL)
2428 break;
2429
2430 if (dyn.d_tag == DT_PPC_GOT)
2431 {
2432 unsigned int g_o_t = dyn.d_un.d_val;
2433 asection *got = bfd_get_section_by_name (abfd, ".got");
2434 if (got != NULL
2435 && bfd_get_section_contents (abfd, got, buf,
2436 g_o_t - got->vma + 4, 4))
2437 glink_vma = bfd_get_32 (abfd, buf);
2438 break;
2439 }
2440 }
2441 free (dynbuf);
2442 }
2443
2444 /* Otherwise we read the first plt entry. */
2445 if (glink_vma == 0)
2446 {
2447 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2448 glink_vma = bfd_get_32 (abfd, buf);
2449 }
2450
2451 if (glink_vma == 0)
2452 return 0;
2453
2454 /* The .glink section usually does not survive the final
2455 link; search for the section (usually .text) where the
2456 glink stubs now reside. */
2457 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2458 if (glink == NULL)
2459 return 0;
2460
2461 /* Determine glink PLT resolver by reading the relative branch
2462 from the first glink stub. */
2463 if (bfd_get_section_contents (abfd, glink, buf,
2464 glink_vma - glink->vma, 4))
2465 {
2466 unsigned int insn = bfd_get_32 (abfd, buf);
2467
2468 /* The first glink stub may either branch to the resolver ... */
2469 insn ^= B;
2470 if ((insn & ~0x3fffffc) == 0)
2471 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2472
2473 /* ... or fall through a bunch of NOPs. */
2474 else if ((insn ^ B ^ NOP) == 0)
2475 for (i = 4;
2476 bfd_get_section_contents (abfd, glink, buf,
2477 glink_vma - glink->vma + i, 4);
2478 i += 4)
2479 if (bfd_get_32 (abfd, buf) != NOP)
2480 {
2481 resolv_vma = glink_vma + i;
2482 break;
2483 }
2484 }
2485
2486 count = relplt->size / sizeof (Elf32_External_Rela);
2487 stub_vma = glink_vma - (bfd_vma) count * 16;
2488 /* If the stubs are those for -shared/-pie then we might have
2489 multiple stubs for each plt entry. If that is the case then
2490 there is no way to associate stubs with their plt entries short
2491 of figuring out the GOT pointer value used in the stub. */
2492 if (!is_nonpic_glink_stub (abfd, glink,
2493 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2494 return 0;
2495
2496 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2497 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2498 return -1;
2499
2500 size = count * sizeof (asymbol);
2501 p = relplt->relocation;
2502 for (i = 0; i < count; i++, p++)
2503 {
2504 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2505 if (p->addend != 0)
2506 size += sizeof ("+0x") - 1 + 8;
2507 }
2508
2509 size += sizeof (asymbol) + sizeof ("__glink");
2510
2511 if (resolv_vma)
2512 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2513
2514 s = *ret = bfd_malloc (size);
2515 if (s == NULL)
2516 return -1;
2517
2518 names = (char *) (s + count + 1 + (resolv_vma != 0));
2519 p = relplt->relocation;
2520 for (i = 0; i < count; i++, p++)
2521 {
2522 size_t len;
2523
2524 *s = **p->sym_ptr_ptr;
2525 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2526 we are defining a symbol, ensure one of them is set. */
2527 if ((s->flags & BSF_LOCAL) == 0)
2528 s->flags |= BSF_GLOBAL;
2529 s->flags |= BSF_SYNTHETIC;
2530 s->section = glink;
2531 s->value = stub_vma - glink->vma;
2532 s->name = names;
2533 s->udata.p = NULL;
2534 len = strlen ((*p->sym_ptr_ptr)->name);
2535 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2536 names += len;
2537 if (p->addend != 0)
2538 {
2539 memcpy (names, "+0x", sizeof ("+0x") - 1);
2540 names += sizeof ("+0x") - 1;
2541 bfd_sprintf_vma (abfd, names, p->addend);
2542 names += strlen (names);
2543 }
2544 memcpy (names, "@plt", sizeof ("@plt"));
2545 names += sizeof ("@plt");
2546 ++s;
2547 stub_vma += 16;
2548 }
2549
2550 /* Add a symbol at the start of the glink branch table. */
2551 memset (s, 0, sizeof *s);
2552 s->the_bfd = abfd;
2553 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2554 s->section = glink;
2555 s->value = glink_vma - glink->vma;
2556 s->name = names;
2557 memcpy (names, "__glink", sizeof ("__glink"));
2558 names += sizeof ("__glink");
2559 s++;
2560 count++;
2561
2562 if (resolv_vma)
2563 {
2564 /* Add a symbol for the glink PLT resolver. */
2565 memset (s, 0, sizeof *s);
2566 s->the_bfd = abfd;
2567 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2568 s->section = glink;
2569 s->value = resolv_vma - glink->vma;
2570 s->name = names;
2571 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2572 names += sizeof ("__glink_PLTresolve");
2573 s++;
2574 count++;
2575 }
2576
2577 return count;
2578 }
2579 \f
2580 /* The following functions are specific to the ELF linker, while
2581 functions above are used generally. They appear in this file more
2582 or less in the order in which they are called. eg.
2583 ppc_elf_check_relocs is called early in the link process,
2584 ppc_elf_finish_dynamic_sections is one of the last functions
2585 called. */
2586
2587 /* The PPC linker needs to keep track of the number of relocs that it
2588 decides to copy as dynamic relocs in check_relocs for each symbol.
2589 This is so that it can later discard them if they are found to be
2590 unnecessary. We store the information in a field extending the
2591 regular ELF linker hash table. */
2592
2593 struct ppc_elf_dyn_relocs
2594 {
2595 struct ppc_elf_dyn_relocs *next;
2596
2597 /* The input section of the reloc. */
2598 asection *sec;
2599
2600 /* Total number of relocs copied for the input section. */
2601 bfd_size_type count;
2602
2603 /* Number of pc-relative relocs copied for the input section. */
2604 bfd_size_type pc_count;
2605 };
2606
2607 /* Track PLT entries needed for a given symbol. We might need more
2608 than one glink entry per symbol when generating a pic binary. */
2609 struct plt_entry
2610 {
2611 struct plt_entry *next;
2612
2613 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2614 This field stores the offset into .got2 used to initialise the
2615 GOT pointer reg. It will always be at least 32768. (Current
2616 gcc always uses an offset of 32768, but ld -r will pack .got2
2617 sections together resulting in larger offsets). */
2618 bfd_vma addend;
2619
2620 /* The .got2 section. */
2621 asection *sec;
2622
2623 /* PLT refcount or offset. */
2624 union
2625 {
2626 bfd_signed_vma refcount;
2627 bfd_vma offset;
2628 } plt;
2629
2630 /* .glink stub offset. */
2631 bfd_vma glink_offset;
2632 };
2633
2634 /* Of those relocs that might be copied as dynamic relocs, this function
2635 selects those that must be copied when linking a shared library,
2636 even when the symbol is local. */
2637
2638 static int
2639 must_be_dyn_reloc (struct bfd_link_info *info,
2640 enum elf_ppc_reloc_type r_type)
2641 {
2642 switch (r_type)
2643 {
2644 default:
2645 return 1;
2646
2647 case R_PPC_REL24:
2648 case R_PPC_REL14:
2649 case R_PPC_REL14_BRTAKEN:
2650 case R_PPC_REL14_BRNTAKEN:
2651 case R_PPC_REL32:
2652 return 0;
2653
2654 case R_PPC_TPREL32:
2655 case R_PPC_TPREL16:
2656 case R_PPC_TPREL16_LO:
2657 case R_PPC_TPREL16_HI:
2658 case R_PPC_TPREL16_HA:
2659 return !info->executable;
2660 }
2661 }
2662
2663 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2664 copying dynamic variables from a shared lib into an app's dynbss
2665 section, and instead use a dynamic relocation to point into the
2666 shared lib. */
2667 #define ELIMINATE_COPY_RELOCS 1
2668
2669 /* PPC ELF linker hash entry. */
2670
2671 struct ppc_elf_link_hash_entry
2672 {
2673 struct elf_link_hash_entry elf;
2674
2675 /* If this symbol is used in the linker created sections, the processor
2676 specific backend uses this field to map the field into the offset
2677 from the beginning of the section. */
2678 elf_linker_section_pointers_t *linker_section_pointer;
2679
2680 /* Track dynamic relocs copied for this symbol. */
2681 struct ppc_elf_dyn_relocs *dyn_relocs;
2682
2683 /* Contexts in which symbol is used in the GOT (or TOC).
2684 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2685 corresponding relocs are encountered during check_relocs.
2686 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2687 indicate the corresponding GOT entry type is not needed. */
2688 #define TLS_GD 1 /* GD reloc. */
2689 #define TLS_LD 2 /* LD reloc. */
2690 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2691 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2692 #define TLS_TLS 16 /* Any TLS reloc. */
2693 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2694 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2695 char tls_mask;
2696
2697 /* Nonzero if we have seen a small data relocation referring to this
2698 symbol. */
2699 unsigned char has_sda_refs;
2700 };
2701
2702 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2703
2704 /* PPC ELF linker hash table. */
2705
2706 struct ppc_elf_link_hash_table
2707 {
2708 struct elf_link_hash_table elf;
2709
2710 /* Short-cuts to get to dynamic linker sections. */
2711 asection *got;
2712 asection *relgot;
2713 asection *glink;
2714 asection *plt;
2715 asection *relplt;
2716 asection *iplt;
2717 asection *reliplt;
2718 asection *dynbss;
2719 asection *relbss;
2720 asection *dynsbss;
2721 asection *relsbss;
2722 elf_linker_section_t sdata[2];
2723 asection *sbss;
2724
2725 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2726 asection *srelplt2;
2727
2728 /* The .got.plt section (VxWorks only)*/
2729 asection *sgotplt;
2730
2731 /* Shortcut to __tls_get_addr. */
2732 struct elf_link_hash_entry *tls_get_addr;
2733
2734 /* The bfd that forced an old-style PLT. */
2735 bfd *old_bfd;
2736
2737 /* TLS local dynamic got entry handling. */
2738 union {
2739 bfd_signed_vma refcount;
2740 bfd_vma offset;
2741 } tlsld_got;
2742
2743 /* Offset of branch table to PltResolve function in glink. */
2744 bfd_vma glink_pltresolve;
2745
2746 /* Size of reserved GOT entries. */
2747 unsigned int got_header_size;
2748 /* Non-zero if allocating the header left a gap. */
2749 unsigned int got_gap;
2750
2751 /* The type of PLT we have chosen to use. */
2752 enum ppc_elf_plt_type plt_type;
2753
2754 /* Set if we should emit symbols for stubs. */
2755 unsigned int emit_stub_syms:1;
2756
2757 /* True if the target system is VxWorks. */
2758 unsigned int is_vxworks:1;
2759
2760 /* The size of PLT entries. */
2761 int plt_entry_size;
2762 /* The distance between adjacent PLT slots. */
2763 int plt_slot_size;
2764 /* The size of the first PLT entry. */
2765 int plt_initial_entry_size;
2766
2767 /* Small local sym cache. */
2768 struct sym_cache sym_cache;
2769 };
2770
2771 /* Get the PPC ELF linker hash table from a link_info structure. */
2772
2773 #define ppc_elf_hash_table(p) \
2774 ((struct ppc_elf_link_hash_table *) (p)->hash)
2775
2776 /* Create an entry in a PPC ELF linker hash table. */
2777
2778 static struct bfd_hash_entry *
2779 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2780 struct bfd_hash_table *table,
2781 const char *string)
2782 {
2783 /* Allocate the structure if it has not already been allocated by a
2784 subclass. */
2785 if (entry == NULL)
2786 {
2787 entry = bfd_hash_allocate (table,
2788 sizeof (struct ppc_elf_link_hash_entry));
2789 if (entry == NULL)
2790 return entry;
2791 }
2792
2793 /* Call the allocation method of the superclass. */
2794 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2795 if (entry != NULL)
2796 {
2797 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2798 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2799 ppc_elf_hash_entry (entry)->tls_mask = 0;
2800 }
2801
2802 return entry;
2803 }
2804
2805 /* Create a PPC ELF linker hash table. */
2806
2807 static struct bfd_link_hash_table *
2808 ppc_elf_link_hash_table_create (bfd *abfd)
2809 {
2810 struct ppc_elf_link_hash_table *ret;
2811
2812 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2813 if (ret == NULL)
2814 return NULL;
2815
2816 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2817 ppc_elf_link_hash_newfunc,
2818 sizeof (struct ppc_elf_link_hash_entry)))
2819 {
2820 free (ret);
2821 return NULL;
2822 }
2823
2824 ret->elf.init_plt_refcount.refcount = 0;
2825 ret->elf.init_plt_refcount.glist = NULL;
2826 ret->elf.init_plt_offset.offset = 0;
2827 ret->elf.init_plt_offset.glist = NULL;
2828
2829 ret->sdata[0].name = ".sdata";
2830 ret->sdata[0].sym_name = "_SDA_BASE_";
2831 ret->sdata[0].bss_name = ".sbss";
2832
2833 ret->sdata[1].name = ".sdata2";
2834 ret->sdata[1].sym_name = "_SDA2_BASE_";
2835 ret->sdata[1].bss_name = ".sbss2";
2836
2837 ret->plt_entry_size = 12;
2838 ret->plt_slot_size = 8;
2839 ret->plt_initial_entry_size = 72;
2840
2841 return &ret->elf.root;
2842 }
2843
2844 /* Create .got and the related sections. */
2845
2846 static bfd_boolean
2847 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2848 {
2849 struct ppc_elf_link_hash_table *htab;
2850 asection *s;
2851 flagword flags;
2852
2853 if (!_bfd_elf_create_got_section (abfd, info))
2854 return FALSE;
2855
2856 htab = ppc_elf_hash_table (info);
2857 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2858 if (s == NULL)
2859 abort ();
2860
2861 if (htab->is_vxworks)
2862 {
2863 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2864 if (!htab->sgotplt)
2865 abort ();
2866 }
2867 else
2868 {
2869 /* The powerpc .got has a blrl instruction in it. Mark it
2870 executable. */
2871 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2872 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2873 if (!bfd_set_section_flags (abfd, s, flags))
2874 return FALSE;
2875 }
2876
2877 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2878 if (!htab->relgot)
2879 abort ();
2880
2881 return TRUE;
2882 }
2883
2884 static bfd_boolean
2885 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2886 {
2887 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2888 asection *s;
2889 flagword flags;
2890
2891 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2892 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2893 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2894 htab->glink = s;
2895 if (s == NULL
2896 || !bfd_set_section_alignment (abfd, s, 4))
2897 return FALSE;
2898
2899 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2900 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2901 htab->iplt = s;
2902 if (s == NULL
2903 || !bfd_set_section_alignment (abfd, s, 4))
2904 return FALSE;
2905
2906 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2907 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2908 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2909 htab->reliplt = s;
2910 if (s == NULL
2911 || ! bfd_set_section_alignment (abfd, s, 2))
2912 return FALSE;
2913 return TRUE;
2914 }
2915
2916 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2917 to output sections (just like _bfd_elf_create_dynamic_sections has
2918 to create .dynbss and .rela.bss). */
2919
2920 static bfd_boolean
2921 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2922 {
2923 struct ppc_elf_link_hash_table *htab;
2924 asection *s;
2925 flagword flags;
2926
2927 htab = ppc_elf_hash_table (info);
2928
2929 if (htab->got == NULL
2930 && !ppc_elf_create_got (abfd, info))
2931 return FALSE;
2932
2933 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2934 return FALSE;
2935
2936 if (htab->glink == NULL
2937 && !ppc_elf_create_glink (abfd, info))
2938 return FALSE;
2939
2940 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2941 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2942 SEC_ALLOC | SEC_LINKER_CREATED);
2943 htab->dynsbss = s;
2944 if (s == NULL)
2945 return FALSE;
2946
2947 if (! info->shared)
2948 {
2949 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2950 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2951 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2952 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2953 htab->relsbss = s;
2954 if (s == NULL
2955 || ! bfd_set_section_alignment (abfd, s, 2))
2956 return FALSE;
2957 }
2958
2959 if (htab->is_vxworks
2960 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2961 return FALSE;
2962
2963 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2964 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2965 if (s == NULL)
2966 abort ();
2967
2968 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2969 if (htab->plt_type == PLT_VXWORKS)
2970 /* The VxWorks PLT is a loaded section with contents. */
2971 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2972 return bfd_set_section_flags (abfd, s, flags);
2973 }
2974
2975 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2976
2977 static void
2978 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2979 struct elf_link_hash_entry *dir,
2980 struct elf_link_hash_entry *ind)
2981 {
2982 struct ppc_elf_link_hash_entry *edir, *eind;
2983
2984 edir = (struct ppc_elf_link_hash_entry *) dir;
2985 eind = (struct ppc_elf_link_hash_entry *) ind;
2986
2987 if (eind->dyn_relocs != NULL)
2988 {
2989 if (edir->dyn_relocs != NULL)
2990 {
2991 struct ppc_elf_dyn_relocs **pp;
2992 struct ppc_elf_dyn_relocs *p;
2993
2994 /* Add reloc counts against the indirect sym to the direct sym
2995 list. Merge any entries against the same section. */
2996 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2997 {
2998 struct ppc_elf_dyn_relocs *q;
2999
3000 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3001 if (q->sec == p->sec)
3002 {
3003 q->pc_count += p->pc_count;
3004 q->count += p->count;
3005 *pp = p->next;
3006 break;
3007 }
3008 if (q == NULL)
3009 pp = &p->next;
3010 }
3011 *pp = edir->dyn_relocs;
3012 }
3013
3014 edir->dyn_relocs = eind->dyn_relocs;
3015 eind->dyn_relocs = NULL;
3016 }
3017
3018 edir->tls_mask |= eind->tls_mask;
3019 edir->has_sda_refs |= eind->has_sda_refs;
3020
3021 /* If called to transfer flags for a weakdef during processing
3022 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3023 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3024 if (!(ELIMINATE_COPY_RELOCS
3025 && eind->elf.root.type != bfd_link_hash_indirect
3026 && edir->elf.dynamic_adjusted))
3027 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3028
3029 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3030 edir->elf.ref_regular |= eind->elf.ref_regular;
3031 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3032 edir->elf.needs_plt |= eind->elf.needs_plt;
3033 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3034
3035 /* If we were called to copy over info for a weak sym, that's all. */
3036 if (eind->elf.root.type != bfd_link_hash_indirect)
3037 return;
3038
3039 /* Copy over the GOT refcount entries that we may have already seen to
3040 the symbol which just became indirect. */
3041 edir->elf.got.refcount += eind->elf.got.refcount;
3042 eind->elf.got.refcount = 0;
3043
3044 /* And plt entries. */
3045 if (eind->elf.plt.plist != NULL)
3046 {
3047 if (edir->elf.plt.plist != NULL)
3048 {
3049 struct plt_entry **entp;
3050 struct plt_entry *ent;
3051
3052 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3053 {
3054 struct plt_entry *dent;
3055
3056 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3057 if (dent->sec == ent->sec && dent->addend == ent->addend)
3058 {
3059 dent->plt.refcount += ent->plt.refcount;
3060 *entp = ent->next;
3061 break;
3062 }
3063 if (dent == NULL)
3064 entp = &ent->next;
3065 }
3066 *entp = edir->elf.plt.plist;
3067 }
3068
3069 edir->elf.plt.plist = eind->elf.plt.plist;
3070 eind->elf.plt.plist = NULL;
3071 }
3072
3073 if (eind->elf.dynindx != -1)
3074 {
3075 if (edir->elf.dynindx != -1)
3076 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3077 edir->elf.dynstr_index);
3078 edir->elf.dynindx = eind->elf.dynindx;
3079 edir->elf.dynstr_index = eind->elf.dynstr_index;
3080 eind->elf.dynindx = -1;
3081 eind->elf.dynstr_index = 0;
3082 }
3083 }
3084
3085 /* Hook called by the linker routine which adds symbols from an object
3086 file. We use it to put .comm items in .sbss, and not .bss. */
3087
3088 static bfd_boolean
3089 ppc_elf_add_symbol_hook (bfd *abfd,
3090 struct bfd_link_info *info,
3091 Elf_Internal_Sym *sym,
3092 const char **namep ATTRIBUTE_UNUSED,
3093 flagword *flagsp ATTRIBUTE_UNUSED,
3094 asection **secp,
3095 bfd_vma *valp)
3096 {
3097 if (sym->st_shndx == SHN_COMMON
3098 && !info->relocatable
3099 && is_ppc_elf (info->output_bfd)
3100 && sym->st_size <= elf_gp_size (abfd))
3101 {
3102 /* Common symbols less than or equal to -G nn bytes are automatically
3103 put into .sbss. */
3104 struct ppc_elf_link_hash_table *htab;
3105
3106 htab = ppc_elf_hash_table (info);
3107 if (htab->sbss == NULL)
3108 {
3109 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3110
3111 if (!htab->elf.dynobj)
3112 htab->elf.dynobj = abfd;
3113
3114 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3115 ".sbss",
3116 flags);
3117 if (htab->sbss == NULL)
3118 return FALSE;
3119 }
3120
3121 *secp = htab->sbss;
3122 *valp = sym->st_size;
3123 }
3124
3125 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3126 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3127
3128 return TRUE;
3129 }
3130 \f
3131 static bfd_boolean
3132 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3133 elf_linker_section_t *lsect)
3134 {
3135 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3136 TRUE, FALSE, TRUE);
3137 if (lsect->sym == NULL)
3138 return FALSE;
3139 if (lsect->sym->root.type == bfd_link_hash_new)
3140 lsect->sym->non_elf = 0;
3141 lsect->sym->ref_regular = 1;
3142 return TRUE;
3143 }
3144
3145 /* Create a special linker section. */
3146
3147 static bfd_boolean
3148 ppc_elf_create_linker_section (bfd *abfd,
3149 struct bfd_link_info *info,
3150 flagword flags,
3151 elf_linker_section_t *lsect)
3152 {
3153 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3154 asection *s;
3155
3156 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3157 | SEC_LINKER_CREATED);
3158
3159 /* Record the first bfd that needs the special sections. */
3160 if (!htab->elf.dynobj)
3161 htab->elf.dynobj = abfd;
3162
3163 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3164 lsect->name,
3165 flags);
3166 if (s == NULL
3167 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3168 return FALSE;
3169 lsect->section = s;
3170
3171 return create_sdata_sym (htab, lsect);
3172 }
3173
3174 /* Find a linker generated pointer with a given addend and type. */
3175
3176 static elf_linker_section_pointers_t *
3177 elf_find_pointer_linker_section
3178 (elf_linker_section_pointers_t *linker_pointers,
3179 bfd_vma addend,
3180 elf_linker_section_t *lsect)
3181 {
3182 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3183 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3184 return linker_pointers;
3185
3186 return NULL;
3187 }
3188
3189 /* Allocate a pointer to live in a linker created section. */
3190
3191 static bfd_boolean
3192 elf_create_pointer_linker_section (bfd *abfd,
3193 elf_linker_section_t *lsect,
3194 struct elf_link_hash_entry *h,
3195 const Elf_Internal_Rela *rel)
3196 {
3197 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3198 elf_linker_section_pointers_t *linker_section_ptr;
3199 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3200 bfd_size_type amt;
3201
3202 BFD_ASSERT (lsect != NULL);
3203
3204 /* Is this a global symbol? */
3205 if (h != NULL)
3206 {
3207 struct ppc_elf_link_hash_entry *eh;
3208
3209 /* Has this symbol already been allocated? If so, our work is done. */
3210 eh = (struct ppc_elf_link_hash_entry *) h;
3211 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3212 rel->r_addend,
3213 lsect))
3214 return TRUE;
3215
3216 ptr_linker_section_ptr = &eh->linker_section_pointer;
3217 }
3218 else
3219 {
3220 BFD_ASSERT (is_ppc_elf (abfd));
3221
3222 /* Allocation of a pointer to a local symbol. */
3223 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3224
3225 /* Allocate a table to hold the local symbols if first time. */
3226 if (!ptr)
3227 {
3228 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3229
3230 amt = num_symbols;
3231 amt *= sizeof (elf_linker_section_pointers_t *);
3232 ptr = bfd_zalloc (abfd, amt);
3233
3234 if (!ptr)
3235 return FALSE;
3236
3237 elf_local_ptr_offsets (abfd) = ptr;
3238 }
3239
3240 /* Has this symbol already been allocated? If so, our work is done. */
3241 if (elf_find_pointer_linker_section (ptr[r_symndx],
3242 rel->r_addend,
3243 lsect))
3244 return TRUE;
3245
3246 ptr_linker_section_ptr = &ptr[r_symndx];
3247 }
3248
3249 /* Allocate space for a pointer in the linker section, and allocate
3250 a new pointer record from internal memory. */
3251 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3252 amt = sizeof (elf_linker_section_pointers_t);
3253 linker_section_ptr = bfd_alloc (abfd, amt);
3254
3255 if (!linker_section_ptr)
3256 return FALSE;
3257
3258 linker_section_ptr->next = *ptr_linker_section_ptr;
3259 linker_section_ptr->addend = rel->r_addend;
3260 linker_section_ptr->lsect = lsect;
3261 *ptr_linker_section_ptr = linker_section_ptr;
3262
3263 linker_section_ptr->offset = lsect->section->size;
3264 lsect->section->size += 4;
3265
3266 #ifdef DEBUG
3267 fprintf (stderr,
3268 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3269 lsect->name, (long) linker_section_ptr->offset,
3270 (long) lsect->section->size);
3271 #endif
3272
3273 return TRUE;
3274 }
3275
3276 static struct plt_entry **
3277 update_local_sym_info (bfd *abfd,
3278 Elf_Internal_Shdr *symtab_hdr,
3279 unsigned long r_symndx,
3280 int tls_type)
3281 {
3282 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3283 struct plt_entry **local_plt;
3284 char *local_got_tls_masks;
3285
3286 if (local_got_refcounts == NULL)
3287 {
3288 bfd_size_type size = symtab_hdr->sh_info;
3289
3290 size *= (sizeof (*local_got_refcounts)
3291 + sizeof (*local_plt)
3292 + sizeof (*local_got_tls_masks));
3293 local_got_refcounts = bfd_zalloc (abfd, size);
3294 if (local_got_refcounts == NULL)
3295 return NULL;
3296 elf_local_got_refcounts (abfd) = local_got_refcounts;
3297 }
3298
3299 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3300 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3301 local_got_tls_masks[r_symndx] |= tls_type;
3302 if (tls_type != PLT_IFUNC)
3303 local_got_refcounts[r_symndx] += 1;
3304 return local_plt + r_symndx;
3305 }
3306
3307 static bfd_boolean
3308 update_plt_info (bfd *abfd, struct plt_entry **plist,
3309 asection *sec, bfd_vma addend)
3310 {
3311 struct plt_entry *ent;
3312
3313 for (ent = *plist; ent != NULL; ent = ent->next)
3314 if (ent->sec == sec && ent->addend == addend)
3315 break;
3316 if (ent == NULL)
3317 {
3318 bfd_size_type amt = sizeof (*ent);
3319 ent = bfd_alloc (abfd, amt);
3320 if (ent == NULL)
3321 return FALSE;
3322 ent->next = *plist;
3323 ent->sec = sec;
3324 ent->addend = addend;
3325 ent->plt.refcount = 0;
3326 *plist = ent;
3327 }
3328 ent->plt.refcount += 1;
3329 return TRUE;
3330 }
3331
3332 static struct plt_entry *
3333 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3334 {
3335 struct plt_entry *ent;
3336
3337 if (addend < 32768)
3338 sec = NULL;
3339 for (ent = *plist; ent != NULL; ent = ent->next)
3340 if (ent->sec == sec && ent->addend == addend)
3341 break;
3342 return ent;
3343 }
3344
3345 static bfd_boolean
3346 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3347 {
3348 return (r_type == R_PPC_PLTREL24
3349 || r_type == R_PPC_LOCAL24PC
3350 || r_type == R_PPC_REL24
3351 || r_type == R_PPC_REL14
3352 || r_type == R_PPC_REL14_BRTAKEN
3353 || r_type == R_PPC_REL14_BRNTAKEN
3354 || r_type == R_PPC_ADDR24
3355 || r_type == R_PPC_ADDR14
3356 || r_type == R_PPC_ADDR14_BRTAKEN
3357 || r_type == R_PPC_ADDR14_BRNTAKEN);
3358 }
3359
3360 static void
3361 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3362 {
3363 (*_bfd_error_handler)
3364 (_("%B: relocation %s cannot be used when making a shared object"),
3365 abfd,
3366 ppc_elf_howto_table[r_type]->name);
3367 bfd_set_error (bfd_error_bad_value);
3368 }
3369
3370 /* Look through the relocs for a section during the first phase, and
3371 allocate space in the global offset table or procedure linkage
3372 table. */
3373
3374 static bfd_boolean
3375 ppc_elf_check_relocs (bfd *abfd,
3376 struct bfd_link_info *info,
3377 asection *sec,
3378 const Elf_Internal_Rela *relocs)
3379 {
3380 struct ppc_elf_link_hash_table *htab;
3381 Elf_Internal_Shdr *symtab_hdr;
3382 struct elf_link_hash_entry **sym_hashes;
3383 const Elf_Internal_Rela *rel;
3384 const Elf_Internal_Rela *rel_end;
3385 asection *got2, *sreloc;
3386 struct elf_link_hash_entry *tga;
3387
3388 if (info->relocatable)
3389 return TRUE;
3390
3391 /* Don't do anything special with non-loaded, non-alloced sections.
3392 In particular, any relocs in such sections should not affect GOT
3393 and PLT reference counting (ie. we don't allow them to create GOT
3394 or PLT entries), there's no possibility or desire to optimize TLS
3395 relocs, and there's not much point in propagating relocs to shared
3396 libs that the dynamic linker won't relocate. */
3397 if ((sec->flags & SEC_ALLOC) == 0)
3398 return TRUE;
3399
3400 #ifdef DEBUG
3401 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3402 sec, abfd);
3403 #endif
3404
3405 BFD_ASSERT (is_ppc_elf (abfd));
3406
3407 /* Initialize howto table if not already done. */
3408 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3409 ppc_elf_howto_init ();
3410
3411 htab = ppc_elf_hash_table (info);
3412 if (htab->glink == NULL)
3413 {
3414 if (htab->elf.dynobj == NULL)
3415 htab->elf.dynobj = abfd;
3416 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3417 return FALSE;
3418 }
3419 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3420 FALSE, FALSE, TRUE);
3421 symtab_hdr = &elf_symtab_hdr (abfd);
3422 sym_hashes = elf_sym_hashes (abfd);
3423 got2 = bfd_get_section_by_name (abfd, ".got2");
3424 sreloc = NULL;
3425
3426 rel_end = relocs + sec->reloc_count;
3427 for (rel = relocs; rel < rel_end; rel++)
3428 {
3429 unsigned long r_symndx;
3430 enum elf_ppc_reloc_type r_type;
3431 struct elf_link_hash_entry *h;
3432 int tls_type;
3433 struct plt_entry **ifunc;
3434
3435 r_symndx = ELF32_R_SYM (rel->r_info);
3436 if (r_symndx < symtab_hdr->sh_info)
3437 h = NULL;
3438 else
3439 {
3440 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3441 while (h->root.type == bfd_link_hash_indirect
3442 || h->root.type == bfd_link_hash_warning)
3443 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3444 }
3445
3446 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3447 This shows up in particular in an R_PPC_ADDR32 in the eabi
3448 startup code. */
3449 if (h != NULL
3450 && htab->got == NULL
3451 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3452 {
3453 if (htab->elf.dynobj == NULL)
3454 htab->elf.dynobj = abfd;
3455 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3456 return FALSE;
3457 BFD_ASSERT (h == htab->elf.hgot);
3458 }
3459
3460 tls_type = 0;
3461 ifunc = NULL;
3462 r_type = ELF32_R_TYPE (rel->r_info);
3463 if (!htab->is_vxworks)
3464 {
3465 if (h != NULL)
3466 {
3467 if (h->type == STT_GNU_IFUNC)
3468 ifunc = &h->plt.plist;
3469 }
3470 else
3471 {
3472 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3473 abfd, r_symndx);
3474 if (isym == NULL)
3475 return FALSE;
3476
3477 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3478 && (!info->shared
3479 || is_branch_reloc (r_type)))
3480 {
3481 bfd_vma addend;
3482
3483 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3484 PLT_IFUNC);
3485 if (ifunc == NULL)
3486 return FALSE;
3487
3488 /* STT_GNU_IFUNC symbols must have a PLT entry;
3489 In a non-pie executable even when there are
3490 no plt calls. */
3491 addend = 0;
3492 if (r_type == R_PPC_PLTREL24)
3493 {
3494 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3495 if (info->shared)
3496 addend = rel->r_addend;
3497 }
3498 if (!update_plt_info (abfd, ifunc,
3499 addend < 32768 ? NULL : got2, addend))
3500 return FALSE;
3501 }
3502 }
3503 }
3504
3505 if (!htab->is_vxworks
3506 && is_branch_reloc (r_type)
3507 && h != NULL
3508 && h == tga)
3509 {
3510 if (rel != relocs
3511 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3512 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3513 /* We have a new-style __tls_get_addr call with a marker
3514 reloc. */
3515 ;
3516 else
3517 /* Mark this section as having an old-style call. */
3518 sec->has_tls_get_addr_call = 1;
3519 }
3520
3521 switch (r_type)
3522 {
3523 case R_PPC_TLSGD:
3524 case R_PPC_TLSLD:
3525 /* These special tls relocs tie a call to __tls_get_addr with
3526 its parameter symbol. */
3527 break;
3528
3529 case R_PPC_GOT_TLSLD16:
3530 case R_PPC_GOT_TLSLD16_LO:
3531 case R_PPC_GOT_TLSLD16_HI:
3532 case R_PPC_GOT_TLSLD16_HA:
3533 tls_type = TLS_TLS | TLS_LD;
3534 goto dogottls;
3535
3536 case R_PPC_GOT_TLSGD16:
3537 case R_PPC_GOT_TLSGD16_LO:
3538 case R_PPC_GOT_TLSGD16_HI:
3539 case R_PPC_GOT_TLSGD16_HA:
3540 tls_type = TLS_TLS | TLS_GD;
3541 goto dogottls;
3542
3543 case R_PPC_GOT_TPREL16:
3544 case R_PPC_GOT_TPREL16_LO:
3545 case R_PPC_GOT_TPREL16_HI:
3546 case R_PPC_GOT_TPREL16_HA:
3547 if (!info->executable)
3548 info->flags |= DF_STATIC_TLS;
3549 tls_type = TLS_TLS | TLS_TPREL;
3550 goto dogottls;
3551
3552 case R_PPC_GOT_DTPREL16:
3553 case R_PPC_GOT_DTPREL16_LO:
3554 case R_PPC_GOT_DTPREL16_HI:
3555 case R_PPC_GOT_DTPREL16_HA:
3556 tls_type = TLS_TLS | TLS_DTPREL;
3557 dogottls:
3558 sec->has_tls_reloc = 1;
3559 /* Fall thru */
3560
3561 /* GOT16 relocations */
3562 case R_PPC_GOT16:
3563 case R_PPC_GOT16_LO:
3564 case R_PPC_GOT16_HI:
3565 case R_PPC_GOT16_HA:
3566 /* This symbol requires a global offset table entry. */
3567 if (htab->got == NULL)
3568 {
3569 if (htab->elf.dynobj == NULL)
3570 htab->elf.dynobj = abfd;
3571 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3572 return FALSE;
3573 }
3574 if (h != NULL)
3575 {
3576 h->got.refcount += 1;
3577 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3578 }
3579 else
3580 /* This is a global offset table entry for a local symbol. */
3581 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3582 return FALSE;
3583 break;
3584
3585 /* Indirect .sdata relocation. */
3586 case R_PPC_EMB_SDAI16:
3587 if (info->shared)
3588 {
3589 bad_shared_reloc (abfd, r_type);
3590 return FALSE;
3591 }
3592 if (htab->sdata[0].section == NULL
3593 && !ppc_elf_create_linker_section (abfd, info, 0,
3594 &htab->sdata[0]))
3595 return FALSE;
3596 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3597 h, rel))
3598 return FALSE;
3599 if (h != NULL)
3600 {
3601 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3602 h->non_got_ref = TRUE;
3603 }
3604 break;
3605
3606 /* Indirect .sdata2 relocation. */
3607 case R_PPC_EMB_SDA2I16:
3608 if (info->shared)
3609 {
3610 bad_shared_reloc (abfd, r_type);
3611 return FALSE;
3612 }
3613 if (htab->sdata[1].section == NULL
3614 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3615 &htab->sdata[1]))
3616 return FALSE;
3617 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3618 h, rel))
3619 return FALSE;
3620 if (h != NULL)
3621 {
3622 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3623 h->non_got_ref = TRUE;
3624 }
3625 break;
3626
3627 case R_PPC_SDAREL16:
3628 if (info->shared)
3629 {
3630 bad_shared_reloc (abfd, r_type);
3631 return FALSE;
3632 }
3633 if (htab->sdata[0].sym == NULL
3634 && !create_sdata_sym (htab, &htab->sdata[0]))
3635 return FALSE;
3636 if (h != NULL)
3637 {
3638 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3639 h->non_got_ref = TRUE;
3640 }
3641 break;
3642
3643 case R_PPC_EMB_SDA2REL:
3644 if (info->shared)
3645 {
3646 bad_shared_reloc (abfd, r_type);
3647 return FALSE;
3648 }
3649 if (htab->sdata[1].sym == NULL
3650 && !create_sdata_sym (htab, &htab->sdata[1]))
3651 return FALSE;
3652 if (h != NULL)
3653 {
3654 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3655 h->non_got_ref = TRUE;
3656 }
3657 break;
3658
3659 case R_PPC_EMB_SDA21:
3660 case R_PPC_EMB_RELSDA:
3661 if (info->shared)
3662 {
3663 bad_shared_reloc (abfd, r_type);
3664 return FALSE;
3665 }
3666 if (htab->sdata[0].sym == NULL
3667 && !create_sdata_sym (htab, &htab->sdata[0]))
3668 return FALSE;
3669 if (htab->sdata[1].sym == NULL
3670 && !create_sdata_sym (htab, &htab->sdata[1]))
3671 return FALSE;
3672 if (h != NULL)
3673 {
3674 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3675 h->non_got_ref = TRUE;
3676 }
3677 break;
3678
3679 case R_PPC_EMB_NADDR32:
3680 case R_PPC_EMB_NADDR16:
3681 case R_PPC_EMB_NADDR16_LO:
3682 case R_PPC_EMB_NADDR16_HI:
3683 case R_PPC_EMB_NADDR16_HA:
3684 if (info->shared)
3685 {
3686 bad_shared_reloc (abfd, r_type);
3687 return FALSE;
3688 }
3689 if (h != NULL)
3690 h->non_got_ref = TRUE;
3691 break;
3692
3693 case R_PPC_PLTREL24:
3694 if (h == NULL)
3695 break;
3696 /* Fall through */
3697 case R_PPC_PLT32:
3698 case R_PPC_PLTREL32:
3699 case R_PPC_PLT16_LO:
3700 case R_PPC_PLT16_HI:
3701 case R_PPC_PLT16_HA:
3702 #ifdef DEBUG
3703 fprintf (stderr, "Reloc requires a PLT entry\n");
3704 #endif
3705 /* This symbol requires a procedure linkage table entry. We
3706 actually build the entry in finish_dynamic_symbol,
3707 because this might be a case of linking PIC code without
3708 linking in any dynamic objects, in which case we don't
3709 need to generate a procedure linkage table after all. */
3710
3711 if (h == NULL)
3712 {
3713 /* It does not make sense to have a procedure linkage
3714 table entry for a local symbol. */
3715 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3716 "local symbol"),
3717 abfd,
3718 sec,
3719 (long) rel->r_offset,
3720 ppc_elf_howto_table[r_type]->name);
3721 bfd_set_error (bfd_error_bad_value);
3722 return FALSE;
3723 }
3724 else
3725 {
3726 bfd_vma addend = 0;
3727
3728 if (r_type == R_PPC_PLTREL24)
3729 {
3730 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3731 if (info->shared)
3732 addend = rel->r_addend;
3733 }
3734 h->needs_plt = 1;
3735 if (!update_plt_info (abfd, &h->plt.plist,
3736 addend < 32768 ? NULL : got2, addend))
3737 return FALSE;
3738 }
3739 break;
3740
3741 /* The following relocations don't need to propagate the
3742 relocation if linking a shared object since they are
3743 section relative. */
3744 case R_PPC_SECTOFF:
3745 case R_PPC_SECTOFF_LO:
3746 case R_PPC_SECTOFF_HI:
3747 case R_PPC_SECTOFF_HA:
3748 case R_PPC_DTPREL16:
3749 case R_PPC_DTPREL16_LO:
3750 case R_PPC_DTPREL16_HI:
3751 case R_PPC_DTPREL16_HA:
3752 case R_PPC_TOC16:
3753 break;
3754
3755 case R_PPC_REL16:
3756 case R_PPC_REL16_LO:
3757 case R_PPC_REL16_HI:
3758 case R_PPC_REL16_HA:
3759 ppc_elf_tdata (abfd)->has_rel16 = 1;
3760 break;
3761
3762 /* These are just markers. */
3763 case R_PPC_TLS:
3764 case R_PPC_EMB_MRKREF:
3765 case R_PPC_NONE:
3766 case R_PPC_max:
3767 case R_PPC_RELAX32:
3768 case R_PPC_RELAX32PC:
3769 case R_PPC_RELAX32_PLT:
3770 case R_PPC_RELAX32PC_PLT:
3771 break;
3772
3773 /* These should only appear in dynamic objects. */
3774 case R_PPC_COPY:
3775 case R_PPC_GLOB_DAT:
3776 case R_PPC_JMP_SLOT:
3777 case R_PPC_RELATIVE:
3778 case R_PPC_IRELATIVE:
3779 break;
3780
3781 /* These aren't handled yet. We'll report an error later. */
3782 case R_PPC_ADDR30:
3783 case R_PPC_EMB_RELSEC16:
3784 case R_PPC_EMB_RELST_LO:
3785 case R_PPC_EMB_RELST_HI:
3786 case R_PPC_EMB_RELST_HA:
3787 case R_PPC_EMB_BIT_FLD:
3788 break;
3789
3790 /* This refers only to functions defined in the shared library. */
3791 case R_PPC_LOCAL24PC:
3792 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3793 {
3794 htab->plt_type = PLT_OLD;
3795 htab->old_bfd = abfd;
3796 }
3797 break;
3798
3799 /* This relocation describes the C++ object vtable hierarchy.
3800 Reconstruct it for later use during GC. */
3801 case R_PPC_GNU_VTINHERIT:
3802 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3803 return FALSE;
3804 break;
3805
3806 /* This relocation describes which C++ vtable entries are actually
3807 used. Record for later use during GC. */
3808 case R_PPC_GNU_VTENTRY:
3809 BFD_ASSERT (h != NULL);
3810 if (h != NULL
3811 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3812 return FALSE;
3813 break;
3814
3815 /* We shouldn't really be seeing these. */
3816 case R_PPC_TPREL32:
3817 case R_PPC_TPREL16:
3818 case R_PPC_TPREL16_LO:
3819 case R_PPC_TPREL16_HI:
3820 case R_PPC_TPREL16_HA:
3821 if (!info->executable)
3822 info->flags |= DF_STATIC_TLS;
3823 goto dodyn;
3824
3825 /* Nor these. */
3826 case R_PPC_DTPMOD32:
3827 case R_PPC_DTPREL32:
3828 goto dodyn;
3829
3830 case R_PPC_REL32:
3831 if (h == NULL
3832 && got2 != NULL
3833 && (sec->flags & SEC_CODE) != 0
3834 && info->shared
3835 && htab->plt_type == PLT_UNSET)
3836 {
3837 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3838 the start of a function, which assembles to a REL32
3839 reference to .got2. If we detect one of these, then
3840 force the old PLT layout because the linker cannot
3841 reliably deduce the GOT pointer value needed for
3842 PLT call stubs. */
3843 asection *s;
3844 Elf_Internal_Sym *isym;
3845
3846 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3847 abfd, r_symndx);
3848 if (isym == NULL)
3849 return FALSE;
3850
3851 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3852 if (s == got2)
3853 {
3854 htab->plt_type = PLT_OLD;
3855 htab->old_bfd = abfd;
3856 }
3857 }
3858 if (h == NULL || h == htab->elf.hgot)
3859 break;
3860 /* fall through */
3861
3862 case R_PPC_ADDR32:
3863 case R_PPC_ADDR16:
3864 case R_PPC_ADDR16_LO:
3865 case R_PPC_ADDR16_HI:
3866 case R_PPC_ADDR16_HA:
3867 case R_PPC_UADDR32:
3868 case R_PPC_UADDR16:
3869 if (h != NULL && !info->shared)
3870 {
3871 /* We may need a plt entry if the symbol turns out to be
3872 a function defined in a dynamic object. */
3873 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3874 return FALSE;
3875
3876 /* We may need a copy reloc too. */
3877 h->non_got_ref = 1;
3878 h->pointer_equality_needed = 1;
3879 }
3880 goto dodyn;
3881
3882 case R_PPC_REL24:
3883 case R_PPC_REL14:
3884 case R_PPC_REL14_BRTAKEN:
3885 case R_PPC_REL14_BRNTAKEN:
3886 if (h == NULL)
3887 break;
3888 if (h == htab->elf.hgot)
3889 {
3890 if (htab->plt_type == PLT_UNSET)
3891 {
3892 htab->plt_type = PLT_OLD;
3893 htab->old_bfd = abfd;
3894 }
3895 break;
3896 }
3897 /* fall through */
3898
3899 case R_PPC_ADDR24:
3900 case R_PPC_ADDR14:
3901 case R_PPC_ADDR14_BRTAKEN:
3902 case R_PPC_ADDR14_BRNTAKEN:
3903 if (h != NULL && !info->shared)
3904 {
3905 /* We may need a plt entry if the symbol turns out to be
3906 a function defined in a dynamic object. */
3907 h->needs_plt = 1;
3908 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3909 return FALSE;
3910 break;
3911 }
3912
3913 dodyn:
3914 /* If we are creating a shared library, and this is a reloc
3915 against a global symbol, or a non PC relative reloc
3916 against a local symbol, then we need to copy the reloc
3917 into the shared library. However, if we are linking with
3918 -Bsymbolic, we do not need to copy a reloc against a
3919 global symbol which is defined in an object we are
3920 including in the link (i.e., DEF_REGULAR is set). At
3921 this point we have not seen all the input files, so it is
3922 possible that DEF_REGULAR is not set now but will be set
3923 later (it is never cleared). In case of a weak definition,
3924 DEF_REGULAR may be cleared later by a strong definition in
3925 a shared library. We account for that possibility below by
3926 storing information in the dyn_relocs field of the hash
3927 table entry. A similar situation occurs when creating
3928 shared libraries and symbol visibility changes render the
3929 symbol local.
3930
3931 If on the other hand, we are creating an executable, we
3932 may need to keep relocations for symbols satisfied by a
3933 dynamic library if we manage to avoid copy relocs for the
3934 symbol. */
3935 if ((info->shared
3936 && (must_be_dyn_reloc (info, r_type)
3937 || (h != NULL
3938 && (! info->symbolic
3939 || h->root.type == bfd_link_hash_defweak
3940 || !h->def_regular))))
3941 || (ELIMINATE_COPY_RELOCS
3942 && !info->shared
3943 && h != NULL
3944 && (h->root.type == bfd_link_hash_defweak
3945 || !h->def_regular)))
3946 {
3947 struct ppc_elf_dyn_relocs *p;
3948 struct ppc_elf_dyn_relocs **head;
3949
3950 #ifdef DEBUG
3951 fprintf (stderr,
3952 "ppc_elf_check_relocs needs to "
3953 "create relocation for %s\n",
3954 (h && h->root.root.string
3955 ? h->root.root.string : "<unknown>"));
3956 #endif
3957 if (sreloc == NULL)
3958 {
3959 if (htab->elf.dynobj == NULL)
3960 htab->elf.dynobj = abfd;
3961
3962 sreloc = _bfd_elf_make_dynamic_reloc_section
3963 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3964
3965 if (sreloc == NULL)
3966 return FALSE;
3967 }
3968
3969 /* If this is a global symbol, we count the number of
3970 relocations we need for this symbol. */
3971 if (h != NULL)
3972 {
3973 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3974 }
3975 else
3976 {
3977 /* Track dynamic relocs needed for local syms too.
3978 We really need local syms available to do this
3979 easily. Oh well. */
3980 asection *s;
3981 void *vpp;
3982 Elf_Internal_Sym *isym;
3983
3984 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3985 abfd, r_symndx);
3986 if (isym == NULL)
3987 return FALSE;
3988
3989 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3990 if (s == NULL)
3991 s = sec;
3992
3993 vpp = &elf_section_data (s)->local_dynrel;
3994 head = (struct ppc_elf_dyn_relocs **) vpp;
3995 }
3996
3997 p = *head;
3998 if (p == NULL || p->sec != sec)
3999 {
4000 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4001 if (p == NULL)
4002 return FALSE;
4003 p->next = *head;
4004 *head = p;
4005 p->sec = sec;
4006 p->count = 0;
4007 p->pc_count = 0;
4008 }
4009
4010 p->count += 1;
4011 if (!must_be_dyn_reloc (info, r_type))
4012 p->pc_count += 1;
4013 }
4014
4015 break;
4016 }
4017 }
4018
4019 return TRUE;
4020 }
4021 \f
4022
4023 /* Merge object attributes from IBFD into OBFD. Raise an error if
4024 there are conflicting attributes. */
4025 static bfd_boolean
4026 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4027 {
4028 obj_attribute *in_attr, *in_attrs;
4029 obj_attribute *out_attr, *out_attrs;
4030
4031 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4032 {
4033 /* This is the first object. Copy the attributes. */
4034 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4035
4036 /* Use the Tag_null value to indicate the attributes have been
4037 initialized. */
4038 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4039
4040 return TRUE;
4041 }
4042
4043 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4044 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4045
4046 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4047 non-conflicting ones. */
4048 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4049 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4050 if (in_attr->i != out_attr->i)
4051 {
4052 out_attr->type = 1;
4053 if (out_attr->i == 0)
4054 out_attr->i = in_attr->i;
4055 else if (in_attr->i == 0)
4056 ;
4057 else if (out_attr->i == 1 && in_attr->i == 2)
4058 _bfd_error_handler
4059 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4060 else if (out_attr->i == 1 && in_attr->i == 3)
4061 _bfd_error_handler
4062 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4063 obfd, ibfd);
4064 else if (out_attr->i == 3 && in_attr->i == 1)
4065 _bfd_error_handler
4066 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4067 ibfd, obfd);
4068 else if (out_attr->i == 3 && in_attr->i == 2)
4069 _bfd_error_handler
4070 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4071 ibfd, obfd);
4072 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4073 _bfd_error_handler
4074 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4075 else if (in_attr->i > 3)
4076 _bfd_error_handler
4077 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4078 in_attr->i);
4079 else
4080 _bfd_error_handler
4081 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4082 out_attr->i);
4083 }
4084
4085 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4086 merge non-conflicting ones. */
4087 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4088 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4089 if (in_attr->i != out_attr->i)
4090 {
4091 const char *in_abi = NULL, *out_abi = NULL;
4092
4093 switch (in_attr->i)
4094 {
4095 case 1: in_abi = "generic"; break;
4096 case 2: in_abi = "AltiVec"; break;
4097 case 3: in_abi = "SPE"; break;
4098 }
4099
4100 switch (out_attr->i)
4101 {
4102 case 1: out_abi = "generic"; break;
4103 case 2: out_abi = "AltiVec"; break;
4104 case 3: out_abi = "SPE"; break;
4105 }
4106
4107 out_attr->type = 1;
4108 if (out_attr->i == 0)
4109 out_attr->i = in_attr->i;
4110 else if (in_attr->i == 0)
4111 ;
4112 /* For now, allow generic to transition to AltiVec or SPE
4113 without a warning. If GCC marked files with their stack
4114 alignment and used don't-care markings for files which are
4115 not affected by the vector ABI, we could warn about this
4116 case too. */
4117 else if (out_attr->i == 1)
4118 out_attr->i = in_attr->i;
4119 else if (in_attr->i == 1)
4120 ;
4121 else if (in_abi == NULL)
4122 _bfd_error_handler
4123 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4124 in_attr->i);
4125 else if (out_abi == NULL)
4126 _bfd_error_handler
4127 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4128 in_attr->i);
4129 else
4130 _bfd_error_handler
4131 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4132 ibfd, obfd, in_abi, out_abi);
4133 }
4134
4135 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4136 and merge non-conflicting ones. */
4137 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4138 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4139 if (in_attr->i != out_attr->i)
4140 {
4141 out_attr->type = 1;
4142 if (out_attr->i == 0)
4143 out_attr->i = in_attr->i;
4144 else if (in_attr->i == 0)
4145 ;
4146 else if (out_attr->i == 1 && in_attr->i == 2)
4147 _bfd_error_handler
4148 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4149 else if (out_attr->i == 2 && in_attr->i == 1)
4150 _bfd_error_handler
4151 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4152 else if (in_attr->i > 2)
4153 _bfd_error_handler
4154 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4155 in_attr->i);
4156 else
4157 _bfd_error_handler
4158 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4159 out_attr->i);
4160 }
4161
4162 /* Merge Tag_compatibility attributes and any common GNU ones. */
4163 _bfd_elf_merge_object_attributes (ibfd, obfd);
4164
4165 return TRUE;
4166 }
4167
4168 /* Merge backend specific data from an object file to the output
4169 object file when linking. */
4170
4171 static bfd_boolean
4172 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4173 {
4174 flagword old_flags;
4175 flagword new_flags;
4176 bfd_boolean error;
4177
4178 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4179 return TRUE;
4180
4181 /* Check if we have the same endianess. */
4182 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4183 return FALSE;
4184
4185 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4186 return FALSE;
4187
4188 new_flags = elf_elfheader (ibfd)->e_flags;
4189 old_flags = elf_elfheader (obfd)->e_flags;
4190 if (!elf_flags_init (obfd))
4191 {
4192 /* First call, no flags set. */
4193 elf_flags_init (obfd) = TRUE;
4194 elf_elfheader (obfd)->e_flags = new_flags;
4195 }
4196
4197 /* Compatible flags are ok. */
4198 else if (new_flags == old_flags)
4199 ;
4200
4201 /* Incompatible flags. */
4202 else
4203 {
4204 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4205 to be linked with either. */
4206 error = FALSE;
4207 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4208 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4209 {
4210 error = TRUE;
4211 (*_bfd_error_handler)
4212 (_("%B: compiled with -mrelocatable and linked with "
4213 "modules compiled normally"), ibfd);
4214 }
4215 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4216 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4217 {
4218 error = TRUE;
4219 (*_bfd_error_handler)
4220 (_("%B: compiled normally and linked with "
4221 "modules compiled with -mrelocatable"), ibfd);
4222 }
4223
4224 /* The output is -mrelocatable-lib iff both the input files are. */
4225 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4226 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4227
4228 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4229 but each input file is either -mrelocatable or -mrelocatable-lib. */
4230 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4231 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4232 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4233 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4234
4235 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4236 any module uses it. */
4237 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4238
4239 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4240 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4241
4242 /* Warn about any other mismatches. */
4243 if (new_flags != old_flags)
4244 {
4245 error = TRUE;
4246 (*_bfd_error_handler)
4247 (_("%B: uses different e_flags (0x%lx) fields "
4248 "than previous modules (0x%lx)"),
4249 ibfd, (long) new_flags, (long) old_flags);
4250 }
4251
4252 if (error)
4253 {
4254 bfd_set_error (bfd_error_bad_value);
4255 return FALSE;
4256 }
4257 }
4258
4259 return TRUE;
4260 }
4261 \f
4262 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4263 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4264 int
4265 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4266 struct bfd_link_info *info,
4267 enum ppc_elf_plt_type plt_style,
4268 int emit_stub_syms)
4269 {
4270 struct ppc_elf_link_hash_table *htab;
4271 flagword flags;
4272
4273 htab = ppc_elf_hash_table (info);
4274
4275 if (htab->plt_type == PLT_UNSET)
4276 {
4277 if (plt_style == PLT_OLD)
4278 htab->plt_type = PLT_OLD;
4279 else
4280 {
4281 bfd *ibfd;
4282 enum ppc_elf_plt_type plt_type = plt_style;
4283
4284 /* Look through the reloc flags left by ppc_elf_check_relocs.
4285 Use the old style bss plt if a file makes plt calls
4286 without using the new relocs, and if ld isn't given
4287 --secure-plt and we never see REL16 relocs. */
4288 if (plt_type == PLT_UNSET)
4289 plt_type = PLT_OLD;
4290 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4291 if (is_ppc_elf (ibfd))
4292 {
4293 if (ppc_elf_tdata (ibfd)->has_rel16)
4294 plt_type = PLT_NEW;
4295 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4296 {
4297 plt_type = PLT_OLD;
4298 htab->old_bfd = ibfd;
4299 break;
4300 }
4301 }
4302 htab->plt_type = plt_type;
4303 }
4304 }
4305 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4306 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4307
4308 htab->emit_stub_syms = emit_stub_syms;
4309
4310 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4311
4312 if (htab->plt_type == PLT_NEW)
4313 {
4314 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4315 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4316
4317 /* The new PLT is a loaded section. */
4318 if (htab->plt != NULL
4319 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4320 return -1;
4321
4322 /* The new GOT is not executable. */
4323 if (htab->got != NULL
4324 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4325 return -1;
4326 }
4327 else
4328 {
4329 /* Stop an unused .glink section from affecting .text alignment. */
4330 if (htab->glink != NULL
4331 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4332 return -1;
4333 }
4334 return htab->plt_type == PLT_NEW;
4335 }
4336 \f
4337 /* Return the section that should be marked against GC for a given
4338 relocation. */
4339
4340 static asection *
4341 ppc_elf_gc_mark_hook (asection *sec,
4342 struct bfd_link_info *info,
4343 Elf_Internal_Rela *rel,
4344 struct elf_link_hash_entry *h,
4345 Elf_Internal_Sym *sym)
4346 {
4347 if (h != NULL)
4348 switch (ELF32_R_TYPE (rel->r_info))
4349 {
4350 case R_PPC_GNU_VTINHERIT:
4351 case R_PPC_GNU_VTENTRY:
4352 return NULL;
4353 }
4354
4355 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4356 }
4357
4358 /* Update the got, plt and dynamic reloc reference counts for the
4359 section being removed. */
4360
4361 static bfd_boolean
4362 ppc_elf_gc_sweep_hook (bfd *abfd,
4363 struct bfd_link_info *info,
4364 asection *sec,
4365 const Elf_Internal_Rela *relocs)
4366 {
4367 struct ppc_elf_link_hash_table *htab;
4368 Elf_Internal_Shdr *symtab_hdr;
4369 struct elf_link_hash_entry **sym_hashes;
4370 bfd_signed_vma *local_got_refcounts;
4371 const Elf_Internal_Rela *rel, *relend;
4372 asection *got2;
4373
4374 if (info->relocatable)
4375 return TRUE;
4376
4377 if ((sec->flags & SEC_ALLOC) == 0)
4378 return TRUE;
4379
4380 elf_section_data (sec)->local_dynrel = NULL;
4381
4382 htab = ppc_elf_hash_table (info);
4383 symtab_hdr = &elf_symtab_hdr (abfd);
4384 sym_hashes = elf_sym_hashes (abfd);
4385 local_got_refcounts = elf_local_got_refcounts (abfd);
4386 got2 = bfd_get_section_by_name (abfd, ".got2");
4387
4388 relend = relocs + sec->reloc_count;
4389 for (rel = relocs; rel < relend; rel++)
4390 {
4391 unsigned long r_symndx;
4392 enum elf_ppc_reloc_type r_type;
4393 struct elf_link_hash_entry *h = NULL;
4394
4395 r_symndx = ELF32_R_SYM (rel->r_info);
4396 if (r_symndx >= symtab_hdr->sh_info)
4397 {
4398 struct ppc_elf_dyn_relocs **pp, *p;
4399 struct ppc_elf_link_hash_entry *eh;
4400
4401 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4402 while (h->root.type == bfd_link_hash_indirect
4403 || h->root.type == bfd_link_hash_warning)
4404 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4405 eh = (struct ppc_elf_link_hash_entry *) h;
4406
4407 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4408 if (p->sec == sec)
4409 {
4410 /* Everything must go for SEC. */
4411 *pp = p->next;
4412 break;
4413 }
4414 }
4415
4416 r_type = ELF32_R_TYPE (rel->r_info);
4417 if (!htab->is_vxworks
4418 && h == NULL
4419 && local_got_refcounts != NULL
4420 && (!info->shared
4421 || is_branch_reloc (r_type)))
4422 {
4423 struct plt_entry **local_plt = (struct plt_entry **)
4424 (local_got_refcounts + symtab_hdr->sh_info);
4425 char *local_got_tls_masks = (char *)
4426 (local_plt + symtab_hdr->sh_info);
4427 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4428 {
4429 struct plt_entry **ifunc = local_plt + r_symndx;
4430 bfd_vma addend = 0;
4431 struct plt_entry *ent;
4432
4433 if (r_type == R_PPC_PLTREL24 && info->shared)
4434 addend = rel->r_addend;
4435 ent = find_plt_ent (ifunc, got2, addend);
4436 if (ent->plt.refcount > 0)
4437 ent->plt.refcount -= 1;
4438 continue;
4439 }
4440 }
4441
4442 switch (r_type)
4443 {
4444 case R_PPC_GOT_TLSLD16:
4445 case R_PPC_GOT_TLSLD16_LO:
4446 case R_PPC_GOT_TLSLD16_HI:
4447 case R_PPC_GOT_TLSLD16_HA:
4448 case R_PPC_GOT_TLSGD16:
4449 case R_PPC_GOT_TLSGD16_LO:
4450 case R_PPC_GOT_TLSGD16_HI:
4451 case R_PPC_GOT_TLSGD16_HA:
4452 case R_PPC_GOT_TPREL16:
4453 case R_PPC_GOT_TPREL16_LO:
4454 case R_PPC_GOT_TPREL16_HI:
4455 case R_PPC_GOT_TPREL16_HA:
4456 case R_PPC_GOT_DTPREL16:
4457 case R_PPC_GOT_DTPREL16_LO:
4458 case R_PPC_GOT_DTPREL16_HI:
4459 case R_PPC_GOT_DTPREL16_HA:
4460 case R_PPC_GOT16:
4461 case R_PPC_GOT16_LO:
4462 case R_PPC_GOT16_HI:
4463 case R_PPC_GOT16_HA:
4464 if (h != NULL)
4465 {
4466 if (h->got.refcount > 0)
4467 h->got.refcount--;
4468 }
4469 else if (local_got_refcounts != NULL)
4470 {
4471 if (local_got_refcounts[r_symndx] > 0)
4472 local_got_refcounts[r_symndx]--;
4473 }
4474 break;
4475
4476 case R_PPC_REL24:
4477 case R_PPC_REL14:
4478 case R_PPC_REL14_BRTAKEN:
4479 case R_PPC_REL14_BRNTAKEN:
4480 case R_PPC_REL32:
4481 if (h == NULL || h == htab->elf.hgot)
4482 break;
4483 /* Fall thru */
4484
4485 case R_PPC_ADDR32:
4486 case R_PPC_ADDR24:
4487 case R_PPC_ADDR16:
4488 case R_PPC_ADDR16_LO:
4489 case R_PPC_ADDR16_HI:
4490 case R_PPC_ADDR16_HA:
4491 case R_PPC_ADDR14:
4492 case R_PPC_ADDR14_BRTAKEN:
4493 case R_PPC_ADDR14_BRNTAKEN:
4494 case R_PPC_UADDR32:
4495 case R_PPC_UADDR16:
4496 if (info->shared)
4497 break;
4498
4499 case R_PPC_PLT32:
4500 case R_PPC_PLTREL24:
4501 case R_PPC_PLTREL32:
4502 case R_PPC_PLT16_LO:
4503 case R_PPC_PLT16_HI:
4504 case R_PPC_PLT16_HA:
4505 if (h != NULL)
4506 {
4507 bfd_vma addend = 0;
4508 struct plt_entry *ent;
4509
4510 if (r_type == R_PPC_PLTREL24 && info->shared)
4511 addend = rel->r_addend;
4512 ent = find_plt_ent (&h->plt.plist, got2, addend);
4513 if (ent->plt.refcount > 0)
4514 ent->plt.refcount -= 1;
4515 }
4516 break;
4517
4518 default:
4519 break;
4520 }
4521 }
4522 return TRUE;
4523 }
4524 \f
4525 /* Set plt output section type, htab->tls_get_addr, and call the
4526 generic ELF tls_setup function. */
4527
4528 asection *
4529 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4530 {
4531 struct ppc_elf_link_hash_table *htab;
4532
4533 htab = ppc_elf_hash_table (info);
4534 if (htab->plt_type == PLT_NEW
4535 && htab->plt != NULL
4536 && htab->plt->output_section != NULL)
4537 {
4538 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4539 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4540 }
4541
4542 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4543 FALSE, FALSE, TRUE);
4544 return _bfd_elf_tls_setup (obfd, info);
4545 }
4546
4547 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4548 HASH. */
4549
4550 static bfd_boolean
4551 branch_reloc_hash_match (const bfd *ibfd,
4552 const Elf_Internal_Rela *rel,
4553 const struct elf_link_hash_entry *hash)
4554 {
4555 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4556 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4557 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4558
4559 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4560 {
4561 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4562 struct elf_link_hash_entry *h;
4563
4564 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4565 while (h->root.type == bfd_link_hash_indirect
4566 || h->root.type == bfd_link_hash_warning)
4567 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4568 if (h == hash)
4569 return TRUE;
4570 }
4571 return FALSE;
4572 }
4573
4574 /* Run through all the TLS relocs looking for optimization
4575 opportunities. */
4576
4577 bfd_boolean
4578 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4579 struct bfd_link_info *info)
4580 {
4581 bfd *ibfd;
4582 asection *sec;
4583 struct ppc_elf_link_hash_table *htab;
4584 int pass;
4585
4586 if (info->relocatable || !info->executable)
4587 return TRUE;
4588
4589 htab = ppc_elf_hash_table (info);
4590 /* Make two passes through the relocs. First time check that tls
4591 relocs involved in setting up a tls_get_addr call are indeed
4592 followed by such a call. If they are not, exclude them from
4593 the optimizations done on the second pass. */
4594 for (pass = 0; pass < 2; ++pass)
4595 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4596 {
4597 Elf_Internal_Sym *locsyms = NULL;
4598 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4599
4600 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4601 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4602 {
4603 Elf_Internal_Rela *relstart, *rel, *relend;
4604
4605 /* Read the relocations. */
4606 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4607 info->keep_memory);
4608 if (relstart == NULL)
4609 return FALSE;
4610
4611 relend = relstart + sec->reloc_count;
4612 for (rel = relstart; rel < relend; rel++)
4613 {
4614 enum elf_ppc_reloc_type r_type;
4615 unsigned long r_symndx;
4616 struct elf_link_hash_entry *h = NULL;
4617 char *tls_mask;
4618 char tls_set, tls_clear;
4619 bfd_boolean is_local;
4620 int expecting_tls_get_addr;
4621 bfd_signed_vma *got_count;
4622
4623 r_symndx = ELF32_R_SYM (rel->r_info);
4624 if (r_symndx >= symtab_hdr->sh_info)
4625 {
4626 struct elf_link_hash_entry **sym_hashes;
4627
4628 sym_hashes = elf_sym_hashes (ibfd);
4629 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4630 while (h->root.type == bfd_link_hash_indirect
4631 || h->root.type == bfd_link_hash_warning)
4632 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4633 }
4634
4635 expecting_tls_get_addr = 0;
4636 is_local = FALSE;
4637 if (h == NULL
4638 || !h->def_dynamic)
4639 is_local = TRUE;
4640
4641 r_type = ELF32_R_TYPE (rel->r_info);
4642 switch (r_type)
4643 {
4644 case R_PPC_GOT_TLSLD16:
4645 case R_PPC_GOT_TLSLD16_LO:
4646 expecting_tls_get_addr = 1;
4647 /* Fall thru */
4648
4649 case R_PPC_GOT_TLSLD16_HI:
4650 case R_PPC_GOT_TLSLD16_HA:
4651 /* These relocs should never be against a symbol
4652 defined in a shared lib. Leave them alone if
4653 that turns out to be the case. */
4654 if (!is_local)
4655 continue;
4656
4657 /* LD -> LE */
4658 tls_set = 0;
4659 tls_clear = TLS_LD;
4660 break;
4661
4662 case R_PPC_GOT_TLSGD16:
4663 case R_PPC_GOT_TLSGD16_LO:
4664 expecting_tls_get_addr = 1;
4665 /* Fall thru */
4666
4667 case R_PPC_GOT_TLSGD16_HI:
4668 case R_PPC_GOT_TLSGD16_HA:
4669 if (is_local)
4670 /* GD -> LE */
4671 tls_set = 0;
4672 else
4673 /* GD -> IE */
4674 tls_set = TLS_TLS | TLS_TPRELGD;
4675 tls_clear = TLS_GD;
4676 break;
4677
4678 case R_PPC_GOT_TPREL16:
4679 case R_PPC_GOT_TPREL16_LO:
4680 case R_PPC_GOT_TPREL16_HI:
4681 case R_PPC_GOT_TPREL16_HA:
4682 if (is_local)
4683 {
4684 /* IE -> LE */
4685 tls_set = 0;
4686 tls_clear = TLS_TPREL;
4687 break;
4688 }
4689 else
4690 continue;
4691
4692 default:
4693 continue;
4694 }
4695
4696 if (pass == 0)
4697 {
4698 if (!expecting_tls_get_addr
4699 || !sec->has_tls_get_addr_call)
4700 continue;
4701
4702 if (rel + 1 < relend
4703 && branch_reloc_hash_match (ibfd, rel + 1,
4704 htab->tls_get_addr))
4705 continue;
4706
4707 /* Uh oh, we didn't find the expected call. We
4708 could just mark this symbol to exclude it
4709 from tls optimization but it's safer to skip
4710 the entire section. */
4711 sec->has_tls_reloc = 0;
4712 break;
4713 }
4714
4715 if (h != NULL)
4716 {
4717 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4718 got_count = &h->got.refcount;
4719 }
4720 else
4721 {
4722 Elf_Internal_Sym *sym;
4723 bfd_signed_vma *lgot_refs;
4724 struct plt_entry **local_plt;
4725 char *lgot_masks;
4726
4727 if (locsyms == NULL)
4728 {
4729 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4730 if (locsyms == NULL)
4731 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4732 symtab_hdr->sh_info,
4733 0, NULL, NULL, NULL);
4734 if (locsyms == NULL)
4735 {
4736 if (elf_section_data (sec)->relocs != relstart)
4737 free (relstart);
4738 return FALSE;
4739 }
4740 }
4741 sym = locsyms + r_symndx;
4742 lgot_refs = elf_local_got_refcounts (ibfd);
4743 if (lgot_refs == NULL)
4744 abort ();
4745 local_plt = (struct plt_entry **)
4746 (lgot_refs + symtab_hdr->sh_info);
4747 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4748 tls_mask = &lgot_masks[r_symndx];
4749 got_count = &lgot_refs[r_symndx];
4750 }
4751
4752 if (tls_set == 0)
4753 {
4754 /* We managed to get rid of a got entry. */
4755 if (*got_count > 0)
4756 *got_count -= 1;
4757 }
4758
4759 if (expecting_tls_get_addr)
4760 {
4761 struct plt_entry *ent;
4762
4763 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4764 NULL, 0);
4765 if (ent != NULL && ent->plt.refcount > 0)
4766 ent->plt.refcount -= 1;
4767 }
4768
4769 *tls_mask |= tls_set;
4770 *tls_mask &= ~tls_clear;
4771 }
4772
4773 if (elf_section_data (sec)->relocs != relstart)
4774 free (relstart);
4775 }
4776
4777 if (locsyms != NULL
4778 && (symtab_hdr->contents != (unsigned char *) locsyms))
4779 {
4780 if (!info->keep_memory)
4781 free (locsyms);
4782 else
4783 symtab_hdr->contents = (unsigned char *) locsyms;
4784 }
4785 }
4786 return TRUE;
4787 }
4788 \f
4789 /* Return true if we have dynamic relocs that apply to read-only sections. */
4790
4791 static bfd_boolean
4792 readonly_dynrelocs (struct elf_link_hash_entry *h)
4793 {
4794 struct ppc_elf_dyn_relocs *p;
4795
4796 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4797 {
4798 asection *s = p->sec->output_section;
4799
4800 if (s != NULL
4801 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4802 == (SEC_READONLY | SEC_ALLOC)))
4803 return TRUE;
4804 }
4805 return FALSE;
4806 }
4807
4808 /* Adjust a symbol defined by a dynamic object and referenced by a
4809 regular object. The current definition is in some section of the
4810 dynamic object, but we're not including those sections. We have to
4811 change the definition to something the rest of the link can
4812 understand. */
4813
4814 static bfd_boolean
4815 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4816 struct elf_link_hash_entry *h)
4817 {
4818 struct ppc_elf_link_hash_table *htab;
4819 asection *s;
4820
4821 #ifdef DEBUG
4822 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4823 h->root.root.string);
4824 #endif
4825
4826 /* Make sure we know what is going on here. */
4827 htab = ppc_elf_hash_table (info);
4828 BFD_ASSERT (htab->elf.dynobj != NULL
4829 && (h->needs_plt
4830 || h->u.weakdef != NULL
4831 || (h->def_dynamic
4832 && h->ref_regular
4833 && !h->def_regular)));
4834
4835 /* Deal with function syms. */
4836 if (h->type == STT_FUNC
4837 || h->type == STT_GNU_IFUNC
4838 || h->needs_plt)
4839 {
4840 /* Clear procedure linkage table information for any symbol that
4841 won't need a .plt entry. */
4842 struct plt_entry *ent;
4843 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4844 if (ent->plt.refcount > 0)
4845 break;
4846 if (ent == NULL
4847 || (h->type != STT_GNU_IFUNC
4848 && (SYMBOL_CALLS_LOCAL (info, h)
4849 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4850 && h->root.type == bfd_link_hash_undefweak))))
4851 {
4852 /* A PLT entry is not required/allowed when:
4853
4854 1. We are not using ld.so; because then the PLT entry
4855 can't be set up, so we can't use one. In this case,
4856 ppc_elf_adjust_dynamic_symbol won't even be called.
4857
4858 2. GC has rendered the entry unused.
4859
4860 3. We know for certain that a call to this symbol
4861 will go to this object, or will remain undefined. */
4862 h->plt.plist = NULL;
4863 h->needs_plt = 0;
4864 }
4865 else
4866 {
4867 /* After adjust_dynamic_symbol, non_got_ref set in the
4868 non-shared case means that we have allocated space in
4869 .dynbss for the symbol and thus dyn_relocs for this
4870 symbol should be discarded.
4871 If we get here we know we are making a PLT entry for this
4872 symbol, and in an executable we'd normally resolve
4873 relocations against this symbol to the PLT entry. Allow
4874 dynamic relocs if the reference is weak, and the dynamic
4875 relocs will not cause text relocation. */
4876 if (!h->ref_regular_nonweak
4877 && h->non_got_ref
4878 && h->type != STT_GNU_IFUNC
4879 && !htab->is_vxworks
4880 && !ppc_elf_hash_entry (h)->has_sda_refs
4881 && !readonly_dynrelocs (h))
4882 h->non_got_ref = 0;
4883 }
4884 return TRUE;
4885 }
4886 else
4887 h->plt.plist = NULL;
4888
4889 /* If this is a weak symbol, and there is a real definition, the
4890 processor independent code will have arranged for us to see the
4891 real definition first, and we can just use the same value. */
4892 if (h->u.weakdef != NULL)
4893 {
4894 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4895 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4896 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4897 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4898 if (ELIMINATE_COPY_RELOCS)
4899 h->non_got_ref = h->u.weakdef->non_got_ref;
4900 return TRUE;
4901 }
4902
4903 /* This is a reference to a symbol defined by a dynamic object which
4904 is not a function. */
4905
4906 /* If we are creating a shared library, we must presume that the
4907 only references to the symbol are via the global offset table.
4908 For such cases we need not do anything here; the relocations will
4909 be handled correctly by relocate_section. */
4910 if (info->shared)
4911 return TRUE;
4912
4913 /* If there are no references to this symbol that do not use the
4914 GOT, we don't need to generate a copy reloc. */
4915 if (!h->non_got_ref)
4916 return TRUE;
4917
4918 /* If we didn't find any dynamic relocs in read-only sections, then
4919 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4920 We can't do this if there are any small data relocations. This
4921 doesn't work on VxWorks, where we can not have dynamic
4922 relocations (other than copy and jump slot relocations) in an
4923 executable. */
4924 if (ELIMINATE_COPY_RELOCS
4925 && !ppc_elf_hash_entry (h)->has_sda_refs
4926 && !htab->is_vxworks
4927 && !h->def_regular
4928 && !readonly_dynrelocs (h))
4929 {
4930 h->non_got_ref = 0;
4931 return TRUE;
4932 }
4933
4934 if (h->size == 0)
4935 {
4936 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4937 h->root.root.string);
4938 return TRUE;
4939 }
4940
4941 /* We must allocate the symbol in our .dynbss section, which will
4942 become part of the .bss section of the executable. There will be
4943 an entry for this symbol in the .dynsym section. The dynamic
4944 object will contain position independent code, so all references
4945 from the dynamic object to this symbol will go through the global
4946 offset table. The dynamic linker will use the .dynsym entry to
4947 determine the address it must put in the global offset table, so
4948 both the dynamic object and the regular object will refer to the
4949 same memory location for the variable.
4950
4951 Of course, if the symbol is referenced using SDAREL relocs, we
4952 must instead allocate it in .sbss. */
4953
4954 if (ppc_elf_hash_entry (h)->has_sda_refs)
4955 s = htab->dynsbss;
4956 else
4957 s = htab->dynbss;
4958 BFD_ASSERT (s != NULL);
4959
4960 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4961 copy the initial value out of the dynamic object and into the
4962 runtime process image. We need to remember the offset into the
4963 .rela.bss section we are going to use. */
4964 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4965 {
4966 asection *srel;
4967
4968 if (ppc_elf_hash_entry (h)->has_sda_refs)
4969 srel = htab->relsbss;
4970 else
4971 srel = htab->relbss;
4972 BFD_ASSERT (srel != NULL);
4973 srel->size += sizeof (Elf32_External_Rela);
4974 h->needs_copy = 1;
4975 }
4976
4977 return _bfd_elf_adjust_dynamic_copy (h, s);
4978 }
4979 \f
4980 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4981 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4982 specifying the addend on the plt relocation. For -fpic code, the sym
4983 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4984 xxxxxxxx.got2.plt_pic32.<callee>. */
4985
4986 static bfd_boolean
4987 add_stub_sym (struct plt_entry *ent,
4988 struct elf_link_hash_entry *h,
4989 struct bfd_link_info *info)
4990 {
4991 struct elf_link_hash_entry *sh;
4992 size_t len1, len2, len3;
4993 char *name;
4994 const char *stub;
4995 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4996
4997 if (info->shared)
4998 stub = ".plt_pic32.";
4999 else
5000 stub = ".plt_call32.";
5001
5002 len1 = strlen (h->root.root.string);
5003 len2 = strlen (stub);
5004 len3 = 0;
5005 if (ent->sec)
5006 len3 = strlen (ent->sec->name);
5007 name = bfd_malloc (len1 + len2 + len3 + 9);
5008 if (name == NULL)
5009 return FALSE;
5010 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5011 if (ent->sec)
5012 memcpy (name + 8, ent->sec->name, len3);
5013 memcpy (name + 8 + len3, stub, len2);
5014 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5015 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5016 if (sh == NULL)
5017 return FALSE;
5018 if (sh->root.type == bfd_link_hash_new)
5019 {
5020 sh->root.type = bfd_link_hash_defined;
5021 sh->root.u.def.section = htab->glink;
5022 sh->root.u.def.value = ent->glink_offset;
5023 sh->ref_regular = 1;
5024 sh->def_regular = 1;
5025 sh->ref_regular_nonweak = 1;
5026 sh->forced_local = 1;
5027 sh->non_elf = 0;
5028 }
5029 return TRUE;
5030 }
5031
5032 /* Allocate NEED contiguous space in .got, and return the offset.
5033 Handles allocation of the got header when crossing 32k. */
5034
5035 static bfd_vma
5036 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5037 {
5038 bfd_vma where;
5039 unsigned int max_before_header;
5040
5041 if (htab->plt_type == PLT_VXWORKS)
5042 {
5043 where = htab->got->size;
5044 htab->got->size += need;
5045 }
5046 else
5047 {
5048 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5049 if (need <= htab->got_gap)
5050 {
5051 where = max_before_header - htab->got_gap;
5052 htab->got_gap -= need;
5053 }
5054 else
5055 {
5056 if (htab->got->size + need > max_before_header
5057 && htab->got->size <= max_before_header)
5058 {
5059 htab->got_gap = max_before_header - htab->got->size;
5060 htab->got->size = max_before_header + htab->got_header_size;
5061 }
5062 where = htab->got->size;
5063 htab->got->size += need;
5064 }
5065 }
5066 return where;
5067 }
5068
5069 /* Allocate space in associated reloc sections for dynamic relocs. */
5070
5071 static bfd_boolean
5072 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5073 {
5074 struct bfd_link_info *info = inf;
5075 struct ppc_elf_link_hash_entry *eh;
5076 struct ppc_elf_link_hash_table *htab;
5077 struct ppc_elf_dyn_relocs *p;
5078
5079 if (h->root.type == bfd_link_hash_indirect)
5080 return TRUE;
5081
5082 if (h->root.type == bfd_link_hash_warning)
5083 /* When warning symbols are created, they **replace** the "real"
5084 entry in the hash table, thus we never get to see the real
5085 symbol in a hash traversal. So look at it now. */
5086 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5087
5088 htab = ppc_elf_hash_table (info);
5089 if (htab->elf.dynamic_sections_created
5090 || h->type == STT_GNU_IFUNC)
5091 {
5092 struct plt_entry *ent;
5093 bfd_boolean doneone = FALSE;
5094 bfd_vma plt_offset = 0, glink_offset = 0;
5095 bfd_boolean dyn;
5096
5097 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5098 if (ent->plt.refcount > 0)
5099 {
5100 /* Make sure this symbol is output as a dynamic symbol. */
5101 if (h->dynindx == -1
5102 && !h->forced_local
5103 && !h->def_regular
5104 && htab->elf.dynamic_sections_created)
5105 {
5106 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5107 return FALSE;
5108 }
5109
5110 dyn = htab->elf.dynamic_sections_created;
5111 if (info->shared
5112 || h->type == STT_GNU_IFUNC
5113 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5114 {
5115 asection *s = htab->plt;
5116 if (!dyn || h->dynindx == -1)
5117 s = htab->iplt;
5118
5119 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5120 {
5121 if (!doneone)
5122 {
5123 plt_offset = s->size;
5124 s->size += 4;
5125 }
5126 ent->plt.offset = plt_offset;
5127
5128 s = htab->glink;
5129 if (!doneone || info->shared)
5130 {
5131 glink_offset = s->size;
5132 s->size += GLINK_ENTRY_SIZE;
5133 }
5134 if (!doneone
5135 && !info->shared
5136 && h->def_dynamic
5137 && !h->def_regular)
5138 {
5139 h->root.u.def.section = s;
5140 h->root.u.def.value = glink_offset;
5141 }
5142 ent->glink_offset = glink_offset;
5143
5144 if (htab->emit_stub_syms
5145 && !add_stub_sym (ent, h, info))
5146 return FALSE;
5147 }
5148 else
5149 {
5150 if (!doneone)
5151 {
5152 /* If this is the first .plt entry, make room
5153 for the special first entry. */
5154 if (s->size == 0)
5155 s->size += htab->plt_initial_entry_size;
5156
5157 /* The PowerPC PLT is actually composed of two
5158 parts, the first part is 2 words (for a load
5159 and a jump), and then there is a remaining
5160 word available at the end. */
5161 plt_offset = (htab->plt_initial_entry_size
5162 + (htab->plt_slot_size
5163 * ((s->size
5164 - htab->plt_initial_entry_size)
5165 / htab->plt_entry_size)));
5166
5167 /* If this symbol is not defined in a regular
5168 file, and we are not generating a shared
5169 library, then set the symbol to this location
5170 in the .plt. This is to avoid text
5171 relocations, and is required to make
5172 function pointers compare as equal between
5173 the normal executable and the shared library. */
5174 if (! info->shared
5175 && h->def_dynamic
5176 && !h->def_regular)
5177 {
5178 h->root.u.def.section = s;
5179 h->root.u.def.value = plt_offset;
5180 }
5181
5182 /* Make room for this entry. */
5183 s->size += htab->plt_entry_size;
5184 /* After the 8192nd entry, room for two entries
5185 is allocated. */
5186 if (htab->plt_type == PLT_OLD
5187 && (s->size - htab->plt_initial_entry_size)
5188 / htab->plt_entry_size
5189 > PLT_NUM_SINGLE_ENTRIES)
5190 s->size += htab->plt_entry_size;
5191 }
5192 ent->plt.offset = plt_offset;
5193 }
5194
5195 /* We also need to make an entry in the .rela.plt section. */
5196 if (!doneone)
5197 {
5198 if (!htab->elf.dynamic_sections_created
5199 || h->dynindx == -1)
5200 htab->reliplt->size += sizeof (Elf32_External_Rela);
5201 else
5202 {
5203 htab->relplt->size += sizeof (Elf32_External_Rela);
5204
5205 if (htab->plt_type == PLT_VXWORKS)
5206 {
5207 /* Allocate space for the unloaded relocations. */
5208 if (!info->shared
5209 && htab->elf.dynamic_sections_created)
5210 {
5211 if (ent->plt.offset
5212 == (bfd_vma) htab->plt_initial_entry_size)
5213 {
5214 htab->srelplt2->size
5215 += (sizeof (Elf32_External_Rela)
5216 * VXWORKS_PLTRESOLVE_RELOCS);
5217 }
5218
5219 htab->srelplt2->size
5220 += (sizeof (Elf32_External_Rela)
5221 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5222 }
5223
5224 /* Every PLT entry has an associated GOT entry in
5225 .got.plt. */
5226 htab->sgotplt->size += 4;
5227 }
5228 }
5229 doneone = TRUE;
5230 }
5231 }
5232 else
5233 ent->plt.offset = (bfd_vma) -1;
5234 }
5235 else
5236 ent->plt.offset = (bfd_vma) -1;
5237
5238 if (!doneone)
5239 {
5240 h->plt.plist = NULL;
5241 h->needs_plt = 0;
5242 }
5243 }
5244 else
5245 {
5246 h->plt.plist = NULL;
5247 h->needs_plt = 0;
5248 }
5249
5250 eh = (struct ppc_elf_link_hash_entry *) h;
5251 if (eh->elf.got.refcount > 0)
5252 {
5253 bfd_boolean dyn;
5254 unsigned int need;
5255
5256 /* Make sure this symbol is output as a dynamic symbol. */
5257 if (eh->elf.dynindx == -1
5258 && !eh->elf.forced_local
5259 && eh->elf.type != STT_GNU_IFUNC
5260 && htab->elf.dynamic_sections_created)
5261 {
5262 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5263 return FALSE;
5264 }
5265
5266 need = 0;
5267 if ((eh->tls_mask & TLS_TLS) != 0)
5268 {
5269 if ((eh->tls_mask & TLS_LD) != 0)
5270 {
5271 if (!eh->elf.def_dynamic)
5272 /* We'll just use htab->tlsld_got.offset. This should
5273 always be the case. It's a little odd if we have
5274 a local dynamic reloc against a non-local symbol. */
5275 htab->tlsld_got.refcount += 1;
5276 else
5277 need += 8;
5278 }
5279 if ((eh->tls_mask & TLS_GD) != 0)
5280 need += 8;
5281 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5282 need += 4;
5283 if ((eh->tls_mask & TLS_DTPREL) != 0)
5284 need += 4;
5285 }
5286 else
5287 need += 4;
5288 if (need == 0)
5289 eh->elf.got.offset = (bfd_vma) -1;
5290 else
5291 {
5292 asection *rsec = NULL;
5293 eh->elf.got.offset = allocate_got (htab, need);
5294 dyn = htab->elf.dynamic_sections_created;
5295 if ((info->shared
5296 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5297 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5298 || eh->elf.root.type != bfd_link_hash_undefweak))
5299 rsec = htab->relgot;
5300 else if (h->type == STT_GNU_IFUNC)
5301 rsec = htab->reliplt;
5302 if (rsec != NULL)
5303 {
5304 /* All the entries we allocated need relocs.
5305 Except LD only needs one. */
5306 if ((eh->tls_mask & TLS_LD) != 0
5307 && eh->elf.def_dynamic)
5308 need -= 4;
5309 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5310 }
5311 }
5312 }
5313 else
5314 eh->elf.got.offset = (bfd_vma) -1;
5315
5316 if (eh->dyn_relocs == NULL
5317 || !htab->elf.dynamic_sections_created)
5318 return TRUE;
5319
5320 /* In the shared -Bsymbolic case, discard space allocated for
5321 dynamic pc-relative relocs against symbols which turn out to be
5322 defined in regular objects. For the normal shared case, discard
5323 space for relocs that have become local due to symbol visibility
5324 changes. */
5325
5326 if (info->shared)
5327 {
5328 /* Relocs that use pc_count are those that appear on a call insn,
5329 or certain REL relocs (see must_be_dyn_reloc) that can be
5330 generated via assembly. We want calls to protected symbols to
5331 resolve directly to the function rather than going via the plt.
5332 If people want function pointer comparisons to work as expected
5333 then they should avoid writing weird assembly. */
5334 if (SYMBOL_CALLS_LOCAL (info, h))
5335 {
5336 struct ppc_elf_dyn_relocs **pp;
5337
5338 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5339 {
5340 p->count -= p->pc_count;
5341 p->pc_count = 0;
5342 if (p->count == 0)
5343 *pp = p->next;
5344 else
5345 pp = &p->next;
5346 }
5347 }
5348
5349 if (htab->is_vxworks)
5350 {
5351 struct ppc_elf_dyn_relocs **pp;
5352
5353 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5354 {
5355 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5356 *pp = p->next;
5357 else
5358 pp = &p->next;
5359 }
5360 }
5361
5362 /* Discard relocs on undefined symbols that must be local. */
5363 if (eh->dyn_relocs != NULL
5364 && h->root.type == bfd_link_hash_undefined
5365 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5366 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5367 eh->dyn_relocs = NULL;
5368
5369 /* Also discard relocs on undefined weak syms with non-default
5370 visibility. */
5371 if (eh->dyn_relocs != NULL
5372 && h->root.type == bfd_link_hash_undefweak)
5373 {
5374 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5375 eh->dyn_relocs = NULL;
5376
5377 /* Make sure undefined weak symbols are output as a dynamic
5378 symbol in PIEs. */
5379 else if (h->dynindx == -1
5380 && !h->forced_local
5381 && !h->def_regular)
5382 {
5383 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5384 return FALSE;
5385 }
5386 }
5387 }
5388 else if (ELIMINATE_COPY_RELOCS)
5389 {
5390 /* For the non-shared case, discard space for relocs against
5391 symbols which turn out to need copy relocs or are not
5392 dynamic. */
5393
5394 if (!h->non_got_ref
5395 && !h->def_regular)
5396 {
5397 /* Make sure this symbol is output as a dynamic symbol.
5398 Undefined weak syms won't yet be marked as dynamic. */
5399 if (h->dynindx == -1
5400 && !h->forced_local)
5401 {
5402 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5403 return FALSE;
5404 }
5405
5406 /* If that succeeded, we know we'll be keeping all the
5407 relocs. */
5408 if (h->dynindx != -1)
5409 goto keep;
5410 }
5411
5412 eh->dyn_relocs = NULL;
5413
5414 keep: ;
5415 }
5416
5417 /* Finally, allocate space. */
5418 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5419 {
5420 asection *sreloc = elf_section_data (p->sec)->sreloc;
5421 if (!htab->elf.dynamic_sections_created)
5422 sreloc = htab->reliplt;
5423 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5424 }
5425
5426 return TRUE;
5427 }
5428
5429 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5430 read-only sections. */
5431
5432 static bfd_boolean
5433 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5434 {
5435 if (h->root.type == bfd_link_hash_indirect)
5436 return TRUE;
5437
5438 if (h->root.type == bfd_link_hash_warning)
5439 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5440
5441 if (readonly_dynrelocs (h))
5442 {
5443 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5444
5445 /* Not an error, just cut short the traversal. */
5446 return FALSE;
5447 }
5448 return TRUE;
5449 }
5450
5451 /* Set the sizes of the dynamic sections. */
5452
5453 static bfd_boolean
5454 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5455 struct bfd_link_info *info)
5456 {
5457 struct ppc_elf_link_hash_table *htab;
5458 asection *s;
5459 bfd_boolean relocs;
5460 bfd *ibfd;
5461
5462 #ifdef DEBUG
5463 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5464 #endif
5465
5466 htab = ppc_elf_hash_table (info);
5467 BFD_ASSERT (htab->elf.dynobj != NULL);
5468
5469 if (elf_hash_table (info)->dynamic_sections_created)
5470 {
5471 /* Set the contents of the .interp section to the interpreter. */
5472 if (info->executable)
5473 {
5474 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5475 BFD_ASSERT (s != NULL);
5476 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5477 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5478 }
5479 }
5480
5481 if (htab->plt_type == PLT_OLD)
5482 htab->got_header_size = 16;
5483 else if (htab->plt_type == PLT_NEW)
5484 htab->got_header_size = 12;
5485
5486 /* Set up .got offsets for local syms, and space for local dynamic
5487 relocs. */
5488 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5489 {
5490 bfd_signed_vma *local_got;
5491 bfd_signed_vma *end_local_got;
5492 struct plt_entry **local_plt;
5493 struct plt_entry **end_local_plt;
5494 char *lgot_masks;
5495 bfd_size_type locsymcount;
5496 Elf_Internal_Shdr *symtab_hdr;
5497
5498 if (!is_ppc_elf (ibfd))
5499 continue;
5500
5501 for (s = ibfd->sections; s != NULL; s = s->next)
5502 {
5503 struct ppc_elf_dyn_relocs *p;
5504
5505 for (p = ((struct ppc_elf_dyn_relocs *)
5506 elf_section_data (s)->local_dynrel);
5507 p != NULL;
5508 p = p->next)
5509 {
5510 if (!bfd_is_abs_section (p->sec)
5511 && bfd_is_abs_section (p->sec->output_section))
5512 {
5513 /* Input section has been discarded, either because
5514 it is a copy of a linkonce section or due to
5515 linker script /DISCARD/, so we'll be discarding
5516 the relocs too. */
5517 }
5518 else if (htab->is_vxworks
5519 && strcmp (p->sec->output_section->name,
5520 ".tls_vars") == 0)
5521 {
5522 /* Relocations in vxworks .tls_vars sections are
5523 handled specially by the loader. */
5524 }
5525 else if (p->count != 0)
5526 {
5527 asection *sreloc = elf_section_data (p->sec)->sreloc;
5528 if (!htab->elf.dynamic_sections_created)
5529 sreloc = htab->reliplt;
5530 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5531 if ((p->sec->output_section->flags
5532 & (SEC_READONLY | SEC_ALLOC))
5533 == (SEC_READONLY | SEC_ALLOC))
5534 info->flags |= DF_TEXTREL;
5535 }
5536 }
5537 }
5538
5539 local_got = elf_local_got_refcounts (ibfd);
5540 if (!local_got)
5541 continue;
5542
5543 symtab_hdr = &elf_symtab_hdr (ibfd);
5544 locsymcount = symtab_hdr->sh_info;
5545 end_local_got = local_got + locsymcount;
5546 local_plt = (struct plt_entry **) end_local_got;
5547 end_local_plt = local_plt + locsymcount;
5548 lgot_masks = (char *) end_local_plt;
5549 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5550 if (*local_got > 0)
5551 {
5552 unsigned int need = 0;
5553 if ((*lgot_masks & TLS_TLS) != 0)
5554 {
5555 if ((*lgot_masks & TLS_GD) != 0)
5556 need += 8;
5557 if ((*lgot_masks & TLS_LD) != 0)
5558 htab->tlsld_got.refcount += 1;
5559 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5560 need += 4;
5561 if ((*lgot_masks & TLS_DTPREL) != 0)
5562 need += 4;
5563 }
5564 else
5565 need += 4;
5566 if (need == 0)
5567 *local_got = (bfd_vma) -1;
5568 else
5569 {
5570 *local_got = allocate_got (htab, need);
5571 if (info->shared)
5572 htab->relgot->size += (need
5573 * (sizeof (Elf32_External_Rela) / 4));
5574 else if ((*lgot_masks & PLT_IFUNC) != 0)
5575 htab->reliplt->size += (need
5576 * (sizeof (Elf32_External_Rela) / 4));
5577 }
5578 }
5579 else
5580 *local_got = (bfd_vma) -1;
5581
5582 if (htab->is_vxworks)
5583 continue;
5584
5585 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5586 for (; local_plt < end_local_plt; ++local_plt)
5587 {
5588 struct plt_entry *ent;
5589 bfd_boolean doneone = FALSE;
5590 bfd_vma plt_offset = 0, glink_offset = 0;
5591
5592 for (ent = *local_plt; ent != NULL; ent = ent->next)
5593 if (ent->plt.refcount > 0)
5594 {
5595 asection *s = htab->iplt;
5596
5597 if (!doneone)
5598 {
5599 plt_offset = s->size;
5600 s->size += 4;
5601 }
5602 ent->plt.offset = plt_offset;
5603
5604 s = htab->glink;
5605 if (!doneone || info->shared)
5606 {
5607 glink_offset = s->size;
5608 s->size += GLINK_ENTRY_SIZE;
5609 }
5610 ent->glink_offset = glink_offset;
5611
5612 if (!doneone)
5613 {
5614 htab->reliplt->size += sizeof (Elf32_External_Rela);
5615 doneone = TRUE;
5616 }
5617 }
5618 else
5619 ent->plt.offset = (bfd_vma) -1;
5620 }
5621 }
5622
5623 /* Allocate space for global sym dynamic relocs. */
5624 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5625
5626 if (htab->tlsld_got.refcount > 0)
5627 {
5628 htab->tlsld_got.offset = allocate_got (htab, 8);
5629 if (info->shared)
5630 htab->relgot->size += sizeof (Elf32_External_Rela);
5631 }
5632 else
5633 htab->tlsld_got.offset = (bfd_vma) -1;
5634
5635 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5636 {
5637 unsigned int g_o_t = 32768;
5638
5639 /* If we haven't allocated the header, do so now. When we get here,
5640 for old plt/got the got size will be 0 to 32764 (not allocated),
5641 or 32780 to 65536 (header allocated). For new plt/got, the
5642 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5643 if (htab->got->size <= 32768)
5644 {
5645 g_o_t = htab->got->size;
5646 if (htab->plt_type == PLT_OLD)
5647 g_o_t += 4;
5648 htab->got->size += htab->got_header_size;
5649 }
5650
5651 htab->elf.hgot->root.u.def.value = g_o_t;
5652 }
5653
5654 if (htab->glink != NULL
5655 && htab->glink->size != 0
5656 && htab->elf.dynamic_sections_created)
5657 {
5658 htab->glink_pltresolve = htab->glink->size;
5659 /* Space for the branch table. */
5660 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5661 /* Pad out to align the start of PLTresolve. */
5662 htab->glink->size += -htab->glink->size & 15;
5663 htab->glink->size += GLINK_PLTRESOLVE;
5664
5665 if (htab->emit_stub_syms)
5666 {
5667 struct elf_link_hash_entry *sh;
5668 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5669 TRUE, FALSE, FALSE);
5670 if (sh == NULL)
5671 return FALSE;
5672 if (sh->root.type == bfd_link_hash_new)
5673 {
5674 sh->root.type = bfd_link_hash_defined;
5675 sh->root.u.def.section = htab->glink;
5676 sh->root.u.def.value = htab->glink_pltresolve;
5677 sh->ref_regular = 1;
5678 sh->def_regular = 1;
5679 sh->ref_regular_nonweak = 1;
5680 sh->forced_local = 1;
5681 sh->non_elf = 0;
5682 }
5683 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5684 TRUE, FALSE, FALSE);
5685 if (sh == NULL)
5686 return FALSE;
5687 if (sh->root.type == bfd_link_hash_new)
5688 {
5689 sh->root.type = bfd_link_hash_defined;
5690 sh->root.u.def.section = htab->glink;
5691 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5692 sh->ref_regular = 1;
5693 sh->def_regular = 1;
5694 sh->ref_regular_nonweak = 1;
5695 sh->forced_local = 1;
5696 sh->non_elf = 0;
5697 }
5698 }
5699 }
5700
5701 /* We've now determined the sizes of the various dynamic sections.
5702 Allocate memory for them. */
5703 relocs = FALSE;
5704 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5705 {
5706 bfd_boolean strip_section = TRUE;
5707
5708 if ((s->flags & SEC_LINKER_CREATED) == 0)
5709 continue;
5710
5711 if (s == htab->plt
5712 || s == htab->got)
5713 {
5714 /* We'd like to strip these sections if they aren't needed, but if
5715 we've exported dynamic symbols from them we must leave them.
5716 It's too late to tell BFD to get rid of the symbols. */
5717 if (htab->elf.hplt != NULL)
5718 strip_section = FALSE;
5719 /* Strip this section if we don't need it; see the
5720 comment below. */
5721 }
5722 else if (s == htab->iplt
5723 || s == htab->glink
5724 || s == htab->sgotplt
5725 || s == htab->sbss
5726 || s == htab->dynbss
5727 || s == htab->dynsbss
5728 || s == htab->sdata[0].section
5729 || s == htab->sdata[1].section)
5730 {
5731 /* Strip these too. */
5732 }
5733 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5734 {
5735 if (s->size != 0)
5736 {
5737 /* Remember whether there are any relocation sections. */
5738 relocs = TRUE;
5739
5740 /* We use the reloc_count field as a counter if we need
5741 to copy relocs into the output file. */
5742 s->reloc_count = 0;
5743 }
5744 }
5745 else
5746 {
5747 /* It's not one of our sections, so don't allocate space. */
5748 continue;
5749 }
5750
5751 if (s->size == 0 && strip_section)
5752 {
5753 /* If we don't need this section, strip it from the
5754 output file. This is mostly to handle .rela.bss and
5755 .rela.plt. We must create both sections in
5756 create_dynamic_sections, because they must be created
5757 before the linker maps input sections to output
5758 sections. The linker does that before
5759 adjust_dynamic_symbol is called, and it is that
5760 function which decides whether anything needs to go
5761 into these sections. */
5762 s->flags |= SEC_EXCLUDE;
5763 continue;
5764 }
5765
5766 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5767 continue;
5768
5769 /* Allocate memory for the section contents. */
5770 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5771 if (s->contents == NULL)
5772 return FALSE;
5773 }
5774
5775 if (htab->elf.dynamic_sections_created)
5776 {
5777 /* Add some entries to the .dynamic section. We fill in the
5778 values later, in ppc_elf_finish_dynamic_sections, but we
5779 must add the entries now so that we get the correct size for
5780 the .dynamic section. The DT_DEBUG entry is filled in by the
5781 dynamic linker and used by the debugger. */
5782 #define add_dynamic_entry(TAG, VAL) \
5783 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5784
5785 if (info->executable)
5786 {
5787 if (!add_dynamic_entry (DT_DEBUG, 0))
5788 return FALSE;
5789 }
5790
5791 if (htab->plt != NULL && htab->plt->size != 0)
5792 {
5793 if (!add_dynamic_entry (DT_PLTGOT, 0)
5794 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5795 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5796 || !add_dynamic_entry (DT_JMPREL, 0))
5797 return FALSE;
5798 }
5799
5800 if (htab->glink != NULL && htab->glink->size != 0)
5801 {
5802 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5803 return FALSE;
5804 }
5805
5806 if (relocs)
5807 {
5808 if (!add_dynamic_entry (DT_RELA, 0)
5809 || !add_dynamic_entry (DT_RELASZ, 0)
5810 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5811 return FALSE;
5812 }
5813
5814 /* If any dynamic relocs apply to a read-only section, then we
5815 need a DT_TEXTREL entry. */
5816 if ((info->flags & DF_TEXTREL) == 0)
5817 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5818 info);
5819
5820 if ((info->flags & DF_TEXTREL) != 0)
5821 {
5822 if (!add_dynamic_entry (DT_TEXTREL, 0))
5823 return FALSE;
5824 }
5825 if (htab->is_vxworks
5826 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5827 return FALSE;
5828 }
5829 #undef add_dynamic_entry
5830
5831 return TRUE;
5832 }
5833
5834 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5835
5836 static bfd_boolean
5837 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5838 {
5839 if (h->plt.plist != NULL
5840 && !h->def_regular
5841 && (!h->pointer_equality_needed
5842 || !h->ref_regular_nonweak))
5843 return FALSE;
5844
5845 return _bfd_elf_hash_symbol (h);
5846 }
5847 \f
5848 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5849
5850 static const int shared_stub_entry[] =
5851 {
5852 0x7c0802a6, /* mflr 0 */
5853 0x429f0005, /* bcl 20, 31, .Lxxx */
5854 0x7d6802a6, /* mflr 11 */
5855 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5856 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5857 0x7c0803a6, /* mtlr 0 */
5858 0x7d6903a6, /* mtctr 11 */
5859 0x4e800420, /* bctr */
5860 };
5861
5862 static const int stub_entry[] =
5863 {
5864 0x3d600000, /* lis 11,xxx@ha */
5865 0x396b0000, /* addi 11,11,xxx@l */
5866 0x7d6903a6, /* mtctr 11 */
5867 0x4e800420, /* bctr */
5868 };
5869
5870 static bfd_boolean
5871 ppc_elf_relax_section (bfd *abfd,
5872 asection *isec,
5873 struct bfd_link_info *link_info,
5874 bfd_boolean *again)
5875 {
5876 struct one_fixup
5877 {
5878 struct one_fixup *next;
5879 asection *tsec;
5880 bfd_vma toff;
5881 bfd_vma trampoff;
5882 };
5883
5884 Elf_Internal_Shdr *symtab_hdr;
5885 bfd_byte *contents = NULL;
5886 Elf_Internal_Sym *isymbuf = NULL;
5887 Elf_Internal_Rela *internal_relocs = NULL;
5888 Elf_Internal_Rela *irel, *irelend;
5889 struct one_fixup *fixups = NULL;
5890 unsigned changes = 0;
5891 struct ppc_elf_link_hash_table *htab;
5892 bfd_size_type trampoff;
5893 asection *got2;
5894
5895 *again = FALSE;
5896
5897 /* Nothing to do if there are no relocations, and no need to do
5898 anything with non-alloc sections. */
5899 if ((isec->flags & SEC_ALLOC) == 0
5900 || (isec->flags & SEC_RELOC) == 0
5901 || isec->reloc_count == 0)
5902 return TRUE;
5903
5904 /* We cannot represent the required PIC relocs in the output, so don't
5905 do anything. The linker doesn't support mixing -shared and -r
5906 anyway. */
5907 if (link_info->relocatable && link_info->shared)
5908 return TRUE;
5909
5910 trampoff = (isec->size + 3) & (bfd_vma) -4;
5911 /* Space for a branch around any trampolines. */
5912 trampoff += 4;
5913
5914 symtab_hdr = &elf_symtab_hdr (abfd);
5915
5916 /* Get a copy of the native relocations. */
5917 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5918 link_info->keep_memory);
5919 if (internal_relocs == NULL)
5920 goto error_return;
5921
5922 htab = ppc_elf_hash_table (link_info);
5923 got2 = bfd_get_section_by_name (abfd, ".got2");
5924
5925 irelend = internal_relocs + isec->reloc_count;
5926 for (irel = internal_relocs; irel < irelend; irel++)
5927 {
5928 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5929 bfd_vma symaddr, reladdr, toff, roff;
5930 asection *tsec;
5931 struct one_fixup *f;
5932 size_t insn_offset = 0;
5933 bfd_vma max_branch_offset, val;
5934 bfd_byte *hit_addr;
5935 unsigned long t0;
5936 struct elf_link_hash_entry *h;
5937 unsigned char sym_type;
5938
5939 switch (r_type)
5940 {
5941 case R_PPC_REL24:
5942 case R_PPC_LOCAL24PC:
5943 case R_PPC_PLTREL24:
5944 max_branch_offset = 1 << 25;
5945 break;
5946
5947 case R_PPC_REL14:
5948 case R_PPC_REL14_BRTAKEN:
5949 case R_PPC_REL14_BRNTAKEN:
5950 max_branch_offset = 1 << 15;
5951 break;
5952
5953 default:
5954 continue;
5955 }
5956
5957 /* Get the value of the symbol referred to by the reloc. */
5958 h = NULL;
5959 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5960 {
5961 /* A local symbol. */
5962 Elf_Internal_Sym *isym;
5963
5964 /* Read this BFD's local symbols. */
5965 if (isymbuf == NULL)
5966 {
5967 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5968 if (isymbuf == NULL)
5969 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5970 symtab_hdr->sh_info, 0,
5971 NULL, NULL, NULL);
5972 if (isymbuf == 0)
5973 goto error_return;
5974 }
5975 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5976 if (isym->st_shndx == SHN_UNDEF)
5977 tsec = bfd_und_section_ptr;
5978 else if (isym->st_shndx == SHN_ABS)
5979 tsec = bfd_abs_section_ptr;
5980 else if (isym->st_shndx == SHN_COMMON)
5981 tsec = bfd_com_section_ptr;
5982 else
5983 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5984
5985 toff = isym->st_value;
5986 sym_type = ELF_ST_TYPE (isym->st_info);
5987 }
5988 else
5989 {
5990 /* Global symbol handling. */
5991 unsigned long indx;
5992
5993 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5994 h = elf_sym_hashes (abfd)[indx];
5995
5996 while (h->root.type == bfd_link_hash_indirect
5997 || h->root.type == bfd_link_hash_warning)
5998 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5999
6000 tsec = NULL;
6001 toff = 0;
6002 if (tsec != NULL)
6003 ;
6004 else if (h->root.type == bfd_link_hash_defined
6005 || h->root.type == bfd_link_hash_defweak)
6006 {
6007 tsec = h->root.u.def.section;
6008 toff = h->root.u.def.value;
6009 }
6010 else if (h->root.type == bfd_link_hash_undefined
6011 || h->root.type == bfd_link_hash_undefweak)
6012 {
6013 tsec = bfd_und_section_ptr;
6014 toff = 0;
6015 }
6016 else
6017 continue;
6018
6019 sym_type = h->type;
6020 }
6021
6022 if (is_branch_reloc (r_type))
6023 {
6024 struct plt_entry **plist = NULL;
6025
6026 if (h != NULL)
6027 plist = &h->plt.plist;
6028 else if (sym_type == STT_GNU_IFUNC)
6029 {
6030 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6031 struct plt_entry **local_plt = (struct plt_entry **)
6032 (local_got_offsets + symtab_hdr->sh_info);
6033 plist = local_plt + ELF32_R_SYM (irel->r_info);
6034 }
6035 if (plist != NULL)
6036 {
6037 bfd_vma addend = 0;
6038 struct plt_entry *ent;
6039
6040 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6041 addend = irel->r_addend;
6042 ent = find_plt_ent (plist, got2, addend);
6043 if (ent != NULL)
6044 {
6045 if (htab->plt_type == PLT_NEW
6046 || h == NULL
6047 || !htab->elf.dynamic_sections_created
6048 || h->dynindx == -1)
6049 {
6050 tsec = htab->glink;
6051 toff = ent->glink_offset;
6052 }
6053 else
6054 {
6055 tsec = htab->plt;
6056 toff = ent->plt.offset;
6057 }
6058 }
6059 }
6060 }
6061
6062 /* If the branch and target are in the same section, you have
6063 no hope of adding stubs. We'll error out later should the
6064 branch overflow. */
6065 if (tsec == isec)
6066 continue;
6067
6068 /* There probably isn't any reason to handle symbols in
6069 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6070 attribute for a code section, and we are only looking at
6071 branches. However, implement it correctly here as a
6072 reference for other target relax_section functions. */
6073 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6074 {
6075 /* At this stage in linking, no SEC_MERGE symbol has been
6076 adjusted, so all references to such symbols need to be
6077 passed through _bfd_merged_section_offset. (Later, in
6078 relocate_section, all SEC_MERGE symbols *except* for
6079 section symbols have been adjusted.)
6080
6081 gas may reduce relocations against symbols in SEC_MERGE
6082 sections to a relocation against the section symbol when
6083 the original addend was zero. When the reloc is against
6084 a section symbol we should include the addend in the
6085 offset passed to _bfd_merged_section_offset, since the
6086 location of interest is the original symbol. On the
6087 other hand, an access to "sym+addend" where "sym" is not
6088 a section symbol should not include the addend; Such an
6089 access is presumed to be an offset from "sym"; The
6090 location of interest is just "sym". */
6091 if (sym_type == STT_SECTION)
6092 toff += irel->r_addend;
6093
6094 toff = _bfd_merged_section_offset (abfd, &tsec,
6095 elf_section_data (tsec)->sec_info,
6096 toff);
6097
6098 if (sym_type != STT_SECTION)
6099 toff += irel->r_addend;
6100 }
6101 /* PLTREL24 addends are special. */
6102 else if (r_type != R_PPC_PLTREL24)
6103 toff += irel->r_addend;
6104
6105 /* Attempted -shared link of non-pic code loses. */
6106 if (tsec->output_section == NULL)
6107 continue;
6108
6109 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6110
6111 roff = irel->r_offset;
6112 reladdr = isec->output_section->vma + isec->output_offset + roff;
6113
6114 /* If the branch is in range, no need to do anything. */
6115 if (tsec != bfd_und_section_ptr
6116 && (!link_info->relocatable
6117 /* A relocatable link may have sections moved during
6118 final link, so do not presume they remain in range. */
6119 || tsec->output_section == isec->output_section)
6120 && symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6121 continue;
6122
6123 /* Look for an existing fixup to this address. */
6124 for (f = fixups; f ; f = f->next)
6125 if (f->tsec == tsec && f->toff == toff)
6126 break;
6127
6128 if (f == NULL)
6129 {
6130 size_t size;
6131 unsigned long stub_rtype;
6132
6133 val = trampoff - roff;
6134 if (val >= max_branch_offset)
6135 /* Oh dear, we can't reach a trampoline. Don't try to add
6136 one. We'll report an error later. */
6137 continue;
6138
6139 if (link_info->shared)
6140 {
6141 size = 4 * ARRAY_SIZE (shared_stub_entry);
6142 insn_offset = 12;
6143 stub_rtype = R_PPC_RELAX32PC;
6144 }
6145 else
6146 {
6147 size = 4 * ARRAY_SIZE (stub_entry);
6148 insn_offset = 0;
6149 stub_rtype = R_PPC_RELAX32;
6150 }
6151
6152 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
6153 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
6154 abort ();
6155 if (tsec == htab->plt
6156 || tsec == htab->glink)
6157 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
6158
6159 /* Hijack the old relocation. Since we need two
6160 relocations for this use a "composite" reloc. */
6161 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6162 stub_rtype);
6163 irel->r_offset = trampoff + insn_offset;
6164 if (r_type == R_PPC_PLTREL24)
6165 irel->r_addend = 0;
6166
6167 /* Record the fixup so we don't do it again this section. */
6168 f = bfd_malloc (sizeof (*f));
6169 f->next = fixups;
6170 f->tsec = tsec;
6171 f->toff = toff;
6172 f->trampoff = trampoff;
6173 fixups = f;
6174
6175 trampoff += size;
6176 changes++;
6177 }
6178 else
6179 {
6180 val = f->trampoff - roff;
6181 if (val >= max_branch_offset)
6182 continue;
6183
6184 /* Nop out the reloc, since we're finalizing things here. */
6185 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6186 }
6187
6188 /* Get the section contents. */
6189 if (contents == NULL)
6190 {
6191 /* Get cached copy if it exists. */
6192 if (elf_section_data (isec)->this_hdr.contents != NULL)
6193 contents = elf_section_data (isec)->this_hdr.contents;
6194 else
6195 {
6196 /* Go get them off disk. */
6197 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6198 goto error_return;
6199 }
6200 }
6201
6202 /* Fix up the existing branch to hit the trampoline. */
6203 hit_addr = contents + roff;
6204 switch (r_type)
6205 {
6206 case R_PPC_REL24:
6207 case R_PPC_LOCAL24PC:
6208 case R_PPC_PLTREL24:
6209 t0 = bfd_get_32 (abfd, hit_addr);
6210 t0 &= ~0x3fffffc;
6211 t0 |= val & 0x3fffffc;
6212 bfd_put_32 (abfd, t0, hit_addr);
6213 break;
6214
6215 case R_PPC_REL14:
6216 case R_PPC_REL14_BRTAKEN:
6217 case R_PPC_REL14_BRNTAKEN:
6218 t0 = bfd_get_32 (abfd, hit_addr);
6219 t0 &= ~0xfffc;
6220 t0 |= val & 0xfffc;
6221 bfd_put_32 (abfd, t0, hit_addr);
6222 break;
6223 }
6224 }
6225
6226 /* Write out the trampolines. */
6227 if (fixups != NULL)
6228 {
6229 const int *stub;
6230 bfd_byte *dest;
6231 bfd_vma val;
6232 int i, size;
6233
6234 do
6235 {
6236 struct one_fixup *f = fixups;
6237 fixups = fixups->next;
6238 free (f);
6239 }
6240 while (fixups);
6241
6242 contents = bfd_realloc_or_free (contents, trampoff);
6243 if (contents == NULL)
6244 goto error_return;
6245
6246 isec->size = (isec->size + 3) & (bfd_vma) -4;
6247 /* Branch around the trampolines. */
6248 val = B + trampoff - isec->size;
6249 dest = contents + isec->size;
6250 isec->size = trampoff;
6251 bfd_put_32 (abfd, val, dest);
6252 dest += 4;
6253
6254 if (link_info->shared)
6255 {
6256 stub = shared_stub_entry;
6257 size = ARRAY_SIZE (shared_stub_entry);
6258 }
6259 else
6260 {
6261 stub = stub_entry;
6262 size = ARRAY_SIZE (stub_entry);
6263 }
6264
6265 i = 0;
6266 while (dest < contents + trampoff)
6267 {
6268 bfd_put_32 (abfd, stub[i], dest);
6269 i++;
6270 if (i == size)
6271 i = 0;
6272 dest += 4;
6273 }
6274 BFD_ASSERT (i == 0);
6275 }
6276
6277 if (isymbuf != NULL
6278 && symtab_hdr->contents != (unsigned char *) isymbuf)
6279 {
6280 if (! link_info->keep_memory)
6281 free (isymbuf);
6282 else
6283 {
6284 /* Cache the symbols for elf_link_input_bfd. */
6285 symtab_hdr->contents = (unsigned char *) isymbuf;
6286 }
6287 }
6288
6289 if (contents != NULL
6290 && elf_section_data (isec)->this_hdr.contents != contents)
6291 {
6292 if (!changes && !link_info->keep_memory)
6293 free (contents);
6294 else
6295 {
6296 /* Cache the section contents for elf_link_input_bfd. */
6297 elf_section_data (isec)->this_hdr.contents = contents;
6298 }
6299 }
6300
6301 if (changes != 0)
6302 {
6303 /* Append sufficient NOP relocs so we can write out relocation
6304 information for the trampolines. */
6305 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6306 * sizeof (*new_relocs));
6307 unsigned ix;
6308
6309 if (!new_relocs)
6310 goto error_return;
6311 memcpy (new_relocs, internal_relocs,
6312 isec->reloc_count * sizeof (*new_relocs));
6313 for (ix = changes; ix--;)
6314 {
6315 irel = new_relocs + ix + isec->reloc_count;
6316
6317 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6318 }
6319 if (internal_relocs != elf_section_data (isec)->relocs)
6320 free (internal_relocs);
6321 elf_section_data (isec)->relocs = new_relocs;
6322 isec->reloc_count += changes;
6323 elf_section_data (isec)->rel_hdr.sh_size
6324 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6325 }
6326 else if (elf_section_data (isec)->relocs != internal_relocs)
6327 free (internal_relocs);
6328
6329 *again = changes != 0;
6330 if (!*again && link_info->relocatable)
6331 {
6332 /* Convert the internal relax relocs to external form. */
6333 for (irel = internal_relocs; irel < irelend; irel++)
6334 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6335 {
6336 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6337
6338 /* Rewrite the reloc and convert one of the trailing nop
6339 relocs to describe this relocation. */
6340 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6341 /* The relocs are at the bottom 2 bytes */
6342 irel[0].r_offset += 2;
6343 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6344 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6345 irel[1].r_offset += 4;
6346 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6347 irel++;
6348 }
6349 }
6350
6351 return TRUE;
6352
6353 error_return:
6354 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6355 free (isymbuf);
6356 if (contents != NULL
6357 && elf_section_data (isec)->this_hdr.contents != contents)
6358 free (contents);
6359 if (internal_relocs != NULL
6360 && elf_section_data (isec)->relocs != internal_relocs)
6361 free (internal_relocs);
6362 return FALSE;
6363 }
6364 \f
6365 /* What to do when ld finds relocations against symbols defined in
6366 discarded sections. */
6367
6368 static unsigned int
6369 ppc_elf_action_discarded (asection *sec)
6370 {
6371 if (strcmp (".fixup", sec->name) == 0)
6372 return 0;
6373
6374 if (strcmp (".got2", sec->name) == 0)
6375 return 0;
6376
6377 return _bfd_elf_default_action_discarded (sec);
6378 }
6379 \f
6380 /* Fill in the address for a pointer generated in a linker section. */
6381
6382 static bfd_vma
6383 elf_finish_pointer_linker_section (bfd *input_bfd,
6384 elf_linker_section_t *lsect,
6385 struct elf_link_hash_entry *h,
6386 bfd_vma relocation,
6387 const Elf_Internal_Rela *rel)
6388 {
6389 elf_linker_section_pointers_t *linker_section_ptr;
6390
6391 BFD_ASSERT (lsect != NULL);
6392
6393 if (h != NULL)
6394 {
6395 /* Handle global symbol. */
6396 struct ppc_elf_link_hash_entry *eh;
6397
6398 eh = (struct ppc_elf_link_hash_entry *) h;
6399 BFD_ASSERT (eh->elf.def_regular);
6400 linker_section_ptr = eh->linker_section_pointer;
6401 }
6402 else
6403 {
6404 /* Handle local symbol. */
6405 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6406
6407 BFD_ASSERT (is_ppc_elf (input_bfd));
6408 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6409 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6410 }
6411
6412 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6413 rel->r_addend,
6414 lsect);
6415 BFD_ASSERT (linker_section_ptr != NULL);
6416
6417 /* Offset will always be a multiple of four, so use the bottom bit
6418 as a "written" flag. */
6419 if ((linker_section_ptr->offset & 1) == 0)
6420 {
6421 bfd_put_32 (lsect->section->owner,
6422 relocation + linker_section_ptr->addend,
6423 lsect->section->contents + linker_section_ptr->offset);
6424 linker_section_ptr->offset += 1;
6425 }
6426
6427 relocation = (lsect->section->output_offset
6428 + linker_section_ptr->offset - 1
6429 - 0x8000);
6430
6431 #ifdef DEBUG
6432 fprintf (stderr,
6433 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6434 lsect->name, (long) relocation, (long) relocation);
6435 #endif
6436
6437 /* Subtract out the addend, because it will get added back in by the normal
6438 processing. */
6439 return relocation - linker_section_ptr->addend;
6440 }
6441
6442 #define PPC_LO(v) ((v) & 0xffff)
6443 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6444 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6445
6446 static void
6447 write_glink_stub (struct plt_entry *ent, asection *plt_sec,
6448 struct bfd_link_info *info)
6449 {
6450 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6451 bfd *output_bfd = info->output_bfd;
6452 bfd_vma plt;
6453 unsigned char *p;
6454
6455 plt = ((ent->plt.offset & ~1)
6456 + plt_sec->output_section->vma
6457 + plt_sec->output_offset);
6458 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6459
6460 if (info->shared)
6461 {
6462 bfd_vma got = 0;
6463
6464 if (ent->addend >= 32768)
6465 got = (ent->addend
6466 + ent->sec->output_section->vma
6467 + ent->sec->output_offset);
6468 else if (htab->elf.hgot != NULL)
6469 got = SYM_VAL (htab->elf.hgot);
6470
6471 plt -= got;
6472
6473 if (plt + 0x8000 < 0x10000)
6474 {
6475 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6476 p += 4;
6477 bfd_put_32 (output_bfd, MTCTR_11, p);
6478 p += 4;
6479 bfd_put_32 (output_bfd, BCTR, p);
6480 p += 4;
6481 bfd_put_32 (output_bfd, NOP, p);
6482 p += 4;
6483 }
6484 else
6485 {
6486 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6487 p += 4;
6488 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6489 p += 4;
6490 bfd_put_32 (output_bfd, MTCTR_11, p);
6491 p += 4;
6492 bfd_put_32 (output_bfd, BCTR, p);
6493 p += 4;
6494 }
6495 }
6496 else
6497 {
6498 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6499 p += 4;
6500 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6501 p += 4;
6502 bfd_put_32 (output_bfd, MTCTR_11, p);
6503 p += 4;
6504 bfd_put_32 (output_bfd, BCTR, p);
6505 p += 4;
6506 }
6507 }
6508
6509 /* The RELOCATE_SECTION function is called by the ELF backend linker
6510 to handle the relocations for a section.
6511
6512 The relocs are always passed as Rela structures; if the section
6513 actually uses Rel structures, the r_addend field will always be
6514 zero.
6515
6516 This function is responsible for adjust the section contents as
6517 necessary, and (if using Rela relocs and generating a
6518 relocatable output file) adjusting the reloc addend as
6519 necessary.
6520
6521 This function does not have to worry about setting the reloc
6522 address or the reloc symbol index.
6523
6524 LOCAL_SYMS is a pointer to the swapped in local symbols.
6525
6526 LOCAL_SECTIONS is an array giving the section in the input file
6527 corresponding to the st_shndx field of each local symbol.
6528
6529 The global hash table entry for the global symbols can be found
6530 via elf_sym_hashes (input_bfd).
6531
6532 When generating relocatable output, this function must handle
6533 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6534 going to be the section symbol corresponding to the output
6535 section, which means that the addend must be adjusted
6536 accordingly. */
6537
6538 static bfd_boolean
6539 ppc_elf_relocate_section (bfd *output_bfd,
6540 struct bfd_link_info *info,
6541 bfd *input_bfd,
6542 asection *input_section,
6543 bfd_byte *contents,
6544 Elf_Internal_Rela *relocs,
6545 Elf_Internal_Sym *local_syms,
6546 asection **local_sections)
6547 {
6548 Elf_Internal_Shdr *symtab_hdr;
6549 struct elf_link_hash_entry **sym_hashes;
6550 struct ppc_elf_link_hash_table *htab;
6551 Elf_Internal_Rela *rel;
6552 Elf_Internal_Rela *relend;
6553 Elf_Internal_Rela outrel;
6554 bfd_byte *loc;
6555 asection *got2, *sreloc = NULL;
6556 bfd_vma *local_got_offsets;
6557 bfd_boolean ret = TRUE;
6558 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6559 bfd_boolean is_vxworks_tls;
6560
6561 #ifdef DEBUG
6562 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6563 "%ld relocations%s",
6564 input_bfd, input_section,
6565 (long) input_section->reloc_count,
6566 (info->relocatable) ? " (relocatable)" : "");
6567 #endif
6568
6569 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6570
6571 /* Initialize howto table if not already done. */
6572 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6573 ppc_elf_howto_init ();
6574
6575 htab = ppc_elf_hash_table (info);
6576 local_got_offsets = elf_local_got_offsets (input_bfd);
6577 symtab_hdr = &elf_symtab_hdr (input_bfd);
6578 sym_hashes = elf_sym_hashes (input_bfd);
6579 /* We have to handle relocations in vxworks .tls_vars sections
6580 specially, because the dynamic loader is 'weird'. */
6581 is_vxworks_tls = (htab->is_vxworks && info->shared
6582 && !strcmp (input_section->output_section->name,
6583 ".tls_vars"));
6584 rel = relocs;
6585 relend = relocs + input_section->reloc_count;
6586 for (; rel < relend; rel++)
6587 {
6588 enum elf_ppc_reloc_type r_type;
6589 bfd_vma addend;
6590 bfd_reloc_status_type r;
6591 Elf_Internal_Sym *sym;
6592 asection *sec;
6593 struct elf_link_hash_entry *h;
6594 const char *sym_name;
6595 reloc_howto_type *howto;
6596 unsigned long r_symndx;
6597 bfd_vma relocation;
6598 bfd_vma branch_bit, insn, from;
6599 bfd_boolean unresolved_reloc;
6600 bfd_boolean warned;
6601 unsigned int tls_type, tls_mask, tls_gd;
6602 struct plt_entry **ifunc;
6603
6604 r_type = ELF32_R_TYPE (rel->r_info);
6605 sym = NULL;
6606 sec = NULL;
6607 h = NULL;
6608 unresolved_reloc = FALSE;
6609 warned = FALSE;
6610 r_symndx = ELF32_R_SYM (rel->r_info);
6611
6612 if (r_symndx < symtab_hdr->sh_info)
6613 {
6614 sym = local_syms + r_symndx;
6615 sec = local_sections[r_symndx];
6616 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6617
6618 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6619 }
6620 else
6621 {
6622 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6623 r_symndx, symtab_hdr, sym_hashes,
6624 h, sec, relocation,
6625 unresolved_reloc, warned);
6626
6627 sym_name = h->root.root.string;
6628 }
6629
6630 if (sec != NULL && elf_discarded_section (sec))
6631 {
6632 /* For relocs against symbols from removed linkonce sections,
6633 or sections discarded by a linker script, we just want the
6634 section contents zeroed. Avoid any special processing. */
6635 howto = NULL;
6636 if (r_type < R_PPC_max)
6637 howto = ppc_elf_howto_table[r_type];
6638 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6639 rel->r_info = 0;
6640 rel->r_addend = 0;
6641 continue;
6642 }
6643
6644 if (info->relocatable)
6645 {
6646 if (got2 != NULL
6647 && r_type == R_PPC_PLTREL24
6648 && rel->r_addend >= 32768)
6649 {
6650 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6651 addend specifies the GOT pointer offset within .got2. */
6652 rel->r_addend += got2->output_offset;
6653 }
6654 continue;
6655 }
6656
6657 /* TLS optimizations. Replace instruction sequences and relocs
6658 based on information we collected in tls_optimize. We edit
6659 RELOCS so that --emit-relocs will output something sensible
6660 for the final instruction stream. */
6661 tls_mask = 0;
6662 tls_gd = 0;
6663 if (h != NULL)
6664 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6665 else if (local_got_offsets != NULL)
6666 {
6667 struct plt_entry **local_plt;
6668 char *lgot_masks;
6669 local_plt
6670 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6671 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6672 tls_mask = lgot_masks[r_symndx];
6673 }
6674
6675 /* Ensure reloc mapping code below stays sane. */
6676 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6677 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6678 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6679 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6680 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6681 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6682 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6683 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6684 abort ();
6685 switch (r_type)
6686 {
6687 default:
6688 break;
6689
6690 case R_PPC_GOT_TPREL16:
6691 case R_PPC_GOT_TPREL16_LO:
6692 if ((tls_mask & TLS_TLS) != 0
6693 && (tls_mask & TLS_TPREL) == 0)
6694 {
6695 bfd_vma insn;
6696 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6697 insn &= 31 << 21;
6698 insn |= 0x3c020000; /* addis 0,2,0 */
6699 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6700 r_type = R_PPC_TPREL16_HA;
6701 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6702 }
6703 break;
6704
6705 case R_PPC_TLS:
6706 if ((tls_mask & TLS_TLS) != 0
6707 && (tls_mask & TLS_TPREL) == 0)
6708 {
6709 bfd_vma insn, rtra;
6710 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6711 if ((insn & ((31 << 26) | (31 << 11)))
6712 == ((31 << 26) | (2 << 11)))
6713 rtra = insn & ((1 << 26) - (1 << 16));
6714 else if ((insn & ((31 << 26) | (31 << 16)))
6715 == ((31 << 26) | (2 << 16)))
6716 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6717 else
6718 abort ();
6719 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6720 /* add -> addi. */
6721 insn = 14 << 26;
6722 else if ((insn & (31 << 1)) == 23 << 1
6723 && ((insn & (31 << 6)) < 14 << 6
6724 || ((insn & (31 << 6)) >= 16 << 6
6725 && (insn & (31 << 6)) < 24 << 6)))
6726 /* load and store indexed -> dform. */
6727 insn = (32 | ((insn >> 6) & 31)) << 26;
6728 else if ((insn & (31 << 1)) == 21 << 1
6729 && (insn & (0x1a << 6)) == 0)
6730 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6731 insn = (((58 | ((insn >> 6) & 4)) << 26)
6732 | ((insn >> 6) & 1));
6733 else if ((insn & (31 << 1)) == 21 << 1
6734 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6735 /* lwax -> lwa. */
6736 insn = (58 << 26) | 2;
6737 else
6738 abort ();
6739 insn |= rtra;
6740 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6741 r_type = R_PPC_TPREL16_LO;
6742 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6743
6744 /* Was PPC_TLS which sits on insn boundary, now
6745 PPC_TPREL16_LO which is at low-order half-word. */
6746 rel->r_offset += d_offset;
6747 }
6748 break;
6749
6750 case R_PPC_GOT_TLSGD16_HI:
6751 case R_PPC_GOT_TLSGD16_HA:
6752 tls_gd = TLS_TPRELGD;
6753 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6754 goto tls_gdld_hi;
6755 break;
6756
6757 case R_PPC_GOT_TLSLD16_HI:
6758 case R_PPC_GOT_TLSLD16_HA:
6759 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6760 {
6761 tls_gdld_hi:
6762 if ((tls_mask & tls_gd) != 0)
6763 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6764 + R_PPC_GOT_TPREL16);
6765 else
6766 {
6767 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6768 rel->r_offset -= d_offset;
6769 r_type = R_PPC_NONE;
6770 }
6771 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6772 }
6773 break;
6774
6775 case R_PPC_GOT_TLSGD16:
6776 case R_PPC_GOT_TLSGD16_LO:
6777 tls_gd = TLS_TPRELGD;
6778 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6779 goto tls_ldgd_opt;
6780 break;
6781
6782 case R_PPC_GOT_TLSLD16:
6783 case R_PPC_GOT_TLSLD16_LO:
6784 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6785 {
6786 unsigned int insn1, insn2;
6787 bfd_vma offset;
6788
6789 tls_ldgd_opt:
6790 offset = (bfd_vma) -1;
6791 /* If not using the newer R_PPC_TLSGD/LD to mark
6792 __tls_get_addr calls, we must trust that the call
6793 stays with its arg setup insns, ie. that the next
6794 reloc is the __tls_get_addr call associated with
6795 the current reloc. Edit both insns. */
6796 if (input_section->has_tls_get_addr_call
6797 && rel + 1 < relend
6798 && branch_reloc_hash_match (input_bfd, rel + 1,
6799 htab->tls_get_addr))
6800 offset = rel[1].r_offset;
6801 if ((tls_mask & tls_gd) != 0)
6802 {
6803 /* IE */
6804 insn1 = bfd_get_32 (output_bfd,
6805 contents + rel->r_offset - d_offset);
6806 insn1 &= (1 << 26) - 1;
6807 insn1 |= 32 << 26; /* lwz */
6808 if (offset != (bfd_vma) -1)
6809 {
6810 rel[1].r_info
6811 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6812 R_PPC_NONE);
6813 insn2 = 0x7c631214; /* add 3,3,2 */
6814 bfd_put_32 (output_bfd, insn2, contents + offset);
6815 }
6816 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6817 + R_PPC_GOT_TPREL16);
6818 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6819 }
6820 else
6821 {
6822 /* LE */
6823 insn1 = 0x3c620000; /* addis 3,2,0 */
6824 if (tls_gd == 0)
6825 {
6826 /* Was an LD reloc. */
6827 for (r_symndx = 0;
6828 r_symndx < symtab_hdr->sh_info;
6829 r_symndx++)
6830 if (local_sections[r_symndx] == sec)
6831 break;
6832 if (r_symndx >= symtab_hdr->sh_info)
6833 r_symndx = 0;
6834 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6835 if (r_symndx != 0)
6836 rel->r_addend -= (local_syms[r_symndx].st_value
6837 + sec->output_offset
6838 + sec->output_section->vma);
6839 }
6840 r_type = R_PPC_TPREL16_HA;
6841 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6842 if (offset != (bfd_vma) -1)
6843 {
6844 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6845 rel[1].r_offset = offset + d_offset;
6846 rel[1].r_addend = rel->r_addend;
6847 insn2 = 0x38630000; /* addi 3,3,0 */
6848 bfd_put_32 (output_bfd, insn2, contents + offset);
6849 }
6850 }
6851 bfd_put_32 (output_bfd, insn1,
6852 contents + rel->r_offset - d_offset);
6853 if (tls_gd == 0)
6854 {
6855 /* We changed the symbol on an LD reloc. Start over
6856 in order to get h, sym, sec etc. right. */
6857 rel--;
6858 continue;
6859 }
6860 }
6861 break;
6862
6863 case R_PPC_TLSGD:
6864 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6865 {
6866 unsigned int insn2;
6867 bfd_vma offset = rel->r_offset;
6868
6869 if ((tls_mask & TLS_TPRELGD) != 0)
6870 {
6871 /* IE */
6872 r_type = R_PPC_NONE;
6873 insn2 = 0x7c631214; /* add 3,3,2 */
6874 }
6875 else
6876 {
6877 /* LE */
6878 r_type = R_PPC_TPREL16_LO;
6879 rel->r_offset += d_offset;
6880 insn2 = 0x38630000; /* addi 3,3,0 */
6881 }
6882 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6883 bfd_put_32 (output_bfd, insn2, contents + offset);
6884 /* Zap the reloc on the _tls_get_addr call too. */
6885 BFD_ASSERT (offset == rel[1].r_offset);
6886 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6887 R_PPC_NONE);
6888 }
6889 break;
6890
6891 case R_PPC_TLSLD:
6892 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6893 {
6894 unsigned int insn2;
6895
6896 for (r_symndx = 0;
6897 r_symndx < symtab_hdr->sh_info;
6898 r_symndx++)
6899 if (local_sections[r_symndx] == sec)
6900 break;
6901 if (r_symndx >= symtab_hdr->sh_info)
6902 r_symndx = 0;
6903 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6904 if (r_symndx != 0)
6905 rel->r_addend -= (local_syms[r_symndx].st_value
6906 + sec->output_offset
6907 + sec->output_section->vma);
6908
6909 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6910 rel->r_offset += d_offset;
6911 insn2 = 0x38630000; /* addi 3,3,0 */
6912 bfd_put_32 (output_bfd, insn2,
6913 contents + rel->r_offset - d_offset);
6914 /* Zap the reloc on the _tls_get_addr call too. */
6915 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
6916 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6917 R_PPC_NONE);
6918 rel--;
6919 continue;
6920 }
6921 break;
6922 }
6923
6924 /* Handle other relocations that tweak non-addend part of insn. */
6925 branch_bit = 0;
6926 switch (r_type)
6927 {
6928 default:
6929 break;
6930
6931 /* Branch taken prediction relocations. */
6932 case R_PPC_ADDR14_BRTAKEN:
6933 case R_PPC_REL14_BRTAKEN:
6934 branch_bit = BRANCH_PREDICT_BIT;
6935 /* Fall thru */
6936
6937 /* Branch not taken prediction relocations. */
6938 case R_PPC_ADDR14_BRNTAKEN:
6939 case R_PPC_REL14_BRNTAKEN:
6940 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6941 insn &= ~BRANCH_PREDICT_BIT;
6942 insn |= branch_bit;
6943
6944 from = (rel->r_offset
6945 + input_section->output_offset
6946 + input_section->output_section->vma);
6947
6948 /* Invert 'y' bit if not the default. */
6949 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6950 insn ^= BRANCH_PREDICT_BIT;
6951
6952 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6953 break;
6954 }
6955
6956 ifunc = NULL;
6957 if (!htab->is_vxworks)
6958 {
6959 struct plt_entry *ent;
6960
6961 if (h != NULL)
6962 {
6963 if (h->type == STT_GNU_IFUNC)
6964 ifunc = &h->plt.plist;
6965 }
6966 else if (local_got_offsets != NULL
6967 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
6968 {
6969 struct plt_entry **local_plt;
6970
6971 local_plt = (struct plt_entry **) (local_got_offsets
6972 + symtab_hdr->sh_info);
6973 ifunc = local_plt + r_symndx;
6974 }
6975
6976 ent = NULL;
6977 if (ifunc != NULL
6978 && (!info->shared
6979 || is_branch_reloc (r_type)))
6980 {
6981 addend = 0;
6982 if (r_type == R_PPC_PLTREL24 && info->shared)
6983 addend = rel->r_addend;
6984 ent = find_plt_ent (ifunc, got2, addend);
6985 }
6986 if (ent != NULL)
6987 {
6988 if (h == NULL && (ent->plt.offset & 1) == 0)
6989 {
6990 Elf_Internal_Rela rela;
6991 bfd_byte *loc;
6992
6993 rela.r_offset = (htab->iplt->output_section->vma
6994 + htab->iplt->output_offset
6995 + ent->plt.offset);
6996 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
6997 rela.r_addend = relocation;
6998 loc = htab->reliplt->contents;
6999 loc += (htab->reliplt->reloc_count++
7000 * sizeof (Elf32_External_Rela));
7001 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7002
7003 ent->plt.offset |= 1;
7004 }
7005 if (h == NULL && (ent->glink_offset & 1) == 0)
7006 {
7007 write_glink_stub (ent, htab->iplt, info);
7008 ent->glink_offset |= 1;
7009 }
7010
7011 unresolved_reloc = FALSE;
7012 if (htab->plt_type == PLT_NEW
7013 || !htab->elf.dynamic_sections_created
7014 || h == NULL)
7015 relocation = (htab->glink->output_section->vma
7016 + htab->glink->output_offset
7017 + (ent->glink_offset & ~1));
7018 else
7019 relocation = (htab->plt->output_section->vma
7020 + htab->plt->output_offset
7021 + ent->plt.offset);
7022 }
7023 }
7024
7025 addend = rel->r_addend;
7026 tls_type = 0;
7027 howto = NULL;
7028 if (r_type < R_PPC_max)
7029 howto = ppc_elf_howto_table[r_type];
7030 switch (r_type)
7031 {
7032 default:
7033 (*_bfd_error_handler)
7034 (_("%B: unknown relocation type %d for symbol %s"),
7035 input_bfd, (int) r_type, sym_name);
7036
7037 bfd_set_error (bfd_error_bad_value);
7038 ret = FALSE;
7039 continue;
7040
7041 case R_PPC_NONE:
7042 case R_PPC_TLS:
7043 case R_PPC_TLSGD:
7044 case R_PPC_TLSLD:
7045 case R_PPC_EMB_MRKREF:
7046 case R_PPC_GNU_VTINHERIT:
7047 case R_PPC_GNU_VTENTRY:
7048 continue;
7049
7050 /* GOT16 relocations. Like an ADDR16 using the symbol's
7051 address in the GOT as relocation value instead of the
7052 symbol's value itself. Also, create a GOT entry for the
7053 symbol and put the symbol value there. */
7054 case R_PPC_GOT_TLSGD16:
7055 case R_PPC_GOT_TLSGD16_LO:
7056 case R_PPC_GOT_TLSGD16_HI:
7057 case R_PPC_GOT_TLSGD16_HA:
7058 tls_type = TLS_TLS | TLS_GD;
7059 goto dogot;
7060
7061 case R_PPC_GOT_TLSLD16:
7062 case R_PPC_GOT_TLSLD16_LO:
7063 case R_PPC_GOT_TLSLD16_HI:
7064 case R_PPC_GOT_TLSLD16_HA:
7065 tls_type = TLS_TLS | TLS_LD;
7066 goto dogot;
7067
7068 case R_PPC_GOT_TPREL16:
7069 case R_PPC_GOT_TPREL16_LO:
7070 case R_PPC_GOT_TPREL16_HI:
7071 case R_PPC_GOT_TPREL16_HA:
7072 tls_type = TLS_TLS | TLS_TPREL;
7073 goto dogot;
7074
7075 case R_PPC_GOT_DTPREL16:
7076 case R_PPC_GOT_DTPREL16_LO:
7077 case R_PPC_GOT_DTPREL16_HI:
7078 case R_PPC_GOT_DTPREL16_HA:
7079 tls_type = TLS_TLS | TLS_DTPREL;
7080 goto dogot;
7081
7082 case R_PPC_GOT16:
7083 case R_PPC_GOT16_LO:
7084 case R_PPC_GOT16_HI:
7085 case R_PPC_GOT16_HA:
7086 tls_mask = 0;
7087 dogot:
7088 {
7089 /* Relocation is to the entry for this symbol in the global
7090 offset table. */
7091 bfd_vma off;
7092 bfd_vma *offp;
7093 unsigned long indx;
7094
7095 if (htab->got == NULL)
7096 abort ();
7097
7098 indx = 0;
7099 if (tls_type == (TLS_TLS | TLS_LD)
7100 && (h == NULL
7101 || !h->def_dynamic))
7102 offp = &htab->tlsld_got.offset;
7103 else if (h != NULL)
7104 {
7105 bfd_boolean dyn;
7106 dyn = htab->elf.dynamic_sections_created;
7107 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7108 || (info->shared
7109 && SYMBOL_REFERENCES_LOCAL (info, h)))
7110 /* This is actually a static link, or it is a
7111 -Bsymbolic link and the symbol is defined
7112 locally, or the symbol was forced to be local
7113 because of a version file. */
7114 ;
7115 else
7116 {
7117 indx = h->dynindx;
7118 unresolved_reloc = FALSE;
7119 }
7120 offp = &h->got.offset;
7121 }
7122 else
7123 {
7124 if (local_got_offsets == NULL)
7125 abort ();
7126 offp = &local_got_offsets[r_symndx];
7127 }
7128
7129 /* The offset must always be a multiple of 4. We use the
7130 least significant bit to record whether we have already
7131 processed this entry. */
7132 off = *offp;
7133 if ((off & 1) != 0)
7134 off &= ~1;
7135 else
7136 {
7137 asection *rsec;
7138 unsigned int tls_m = (tls_mask
7139 & (TLS_LD | TLS_GD | TLS_DTPREL
7140 | TLS_TPREL | TLS_TPRELGD));
7141
7142 if (offp == &htab->tlsld_got.offset)
7143 tls_m = TLS_LD;
7144 else if (h == NULL
7145 || !h->def_dynamic)
7146 tls_m &= ~TLS_LD;
7147
7148 /* We might have multiple got entries for this sym.
7149 Initialize them all. */
7150 do
7151 {
7152 int tls_ty = 0;
7153
7154 if ((tls_m & TLS_LD) != 0)
7155 {
7156 tls_ty = TLS_TLS | TLS_LD;
7157 tls_m &= ~TLS_LD;
7158 }
7159 else if ((tls_m & TLS_GD) != 0)
7160 {
7161 tls_ty = TLS_TLS | TLS_GD;
7162 tls_m &= ~TLS_GD;
7163 }
7164 else if ((tls_m & TLS_DTPREL) != 0)
7165 {
7166 tls_ty = TLS_TLS | TLS_DTPREL;
7167 tls_m &= ~TLS_DTPREL;
7168 }
7169 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7170 {
7171 tls_ty = TLS_TLS | TLS_TPREL;
7172 tls_m = 0;
7173 }
7174
7175 /* Generate relocs for the dynamic linker. */
7176 rsec = NULL;
7177 if ((info->shared || indx != 0)
7178 && (offp == &htab->tlsld_got.offset
7179 || h == NULL
7180 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7181 || h->root.type != bfd_link_hash_undefweak))
7182 rsec = htab->relgot;
7183 else if (ifunc != NULL)
7184 rsec = htab->reliplt;
7185 if (rsec != NULL)
7186 {
7187 outrel.r_offset = (htab->got->output_section->vma
7188 + htab->got->output_offset
7189 + off);
7190 outrel.r_addend = 0;
7191 if (tls_ty & (TLS_LD | TLS_GD))
7192 {
7193 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7194 if (tls_ty == (TLS_TLS | TLS_GD))
7195 {
7196 loc = rsec->contents;
7197 loc += (rsec->reloc_count++
7198 * sizeof (Elf32_External_Rela));
7199 bfd_elf32_swap_reloca_out (output_bfd,
7200 &outrel, loc);
7201 outrel.r_offset += 4;
7202 outrel.r_info
7203 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7204 }
7205 }
7206 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7207 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7208 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7209 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7210 else if (indx != 0)
7211 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7212 else if (ifunc != NULL)
7213 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7214 else
7215 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7216 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7217 {
7218 outrel.r_addend += relocation;
7219 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7220 outrel.r_addend -= htab->elf.tls_sec->vma;
7221 }
7222 loc = rsec->contents;
7223 loc += (rsec->reloc_count++
7224 * sizeof (Elf32_External_Rela));
7225 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7226 }
7227
7228 /* Init the .got section contents if we're not
7229 emitting a reloc. */
7230 else
7231 {
7232 bfd_vma value = relocation;
7233
7234 if (tls_ty == (TLS_TLS | TLS_LD))
7235 value = 1;
7236 else if (tls_ty != 0)
7237 {
7238 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7239 if (tls_ty == (TLS_TLS | TLS_TPREL))
7240 value += DTP_OFFSET - TP_OFFSET;
7241
7242 if (tls_ty == (TLS_TLS | TLS_GD))
7243 {
7244 bfd_put_32 (output_bfd, value,
7245 htab->got->contents + off + 4);
7246 value = 1;
7247 }
7248 }
7249 bfd_put_32 (output_bfd, value,
7250 htab->got->contents + off);
7251 }
7252
7253 off += 4;
7254 if (tls_ty & (TLS_LD | TLS_GD))
7255 off += 4;
7256 }
7257 while (tls_m != 0);
7258
7259 off = *offp;
7260 *offp = off | 1;
7261 }
7262
7263 if (off >= (bfd_vma) -2)
7264 abort ();
7265
7266 if ((tls_type & TLS_TLS) != 0)
7267 {
7268 if (tls_type != (TLS_TLS | TLS_LD))
7269 {
7270 if ((tls_mask & TLS_LD) != 0
7271 && !(h == NULL
7272 || !h->def_dynamic))
7273 off += 8;
7274 if (tls_type != (TLS_TLS | TLS_GD))
7275 {
7276 if ((tls_mask & TLS_GD) != 0)
7277 off += 8;
7278 if (tls_type != (TLS_TLS | TLS_DTPREL))
7279 {
7280 if ((tls_mask & TLS_DTPREL) != 0)
7281 off += 4;
7282 }
7283 }
7284 }
7285 }
7286
7287 relocation = (htab->got->output_section->vma
7288 + htab->got->output_offset
7289 + off
7290 - SYM_VAL (htab->elf.hgot));
7291
7292 /* Addends on got relocations don't make much sense.
7293 x+off@got is actually x@got+off, and since the got is
7294 generated by a hash table traversal, the value in the
7295 got at entry m+n bears little relation to the entry m. */
7296 if (addend != 0)
7297 (*_bfd_error_handler)
7298 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7299 input_bfd,
7300 input_section,
7301 (long) rel->r_offset,
7302 howto->name,
7303 sym_name);
7304 }
7305 break;
7306
7307 /* Relocations that need no special processing. */
7308 case R_PPC_LOCAL24PC:
7309 /* It makes no sense to point a local relocation
7310 at a symbol not in this object. */
7311 if (unresolved_reloc)
7312 {
7313 if (! (*info->callbacks->undefined_symbol) (info,
7314 h->root.root.string,
7315 input_bfd,
7316 input_section,
7317 rel->r_offset,
7318 TRUE))
7319 return FALSE;
7320 continue;
7321 }
7322 break;
7323
7324 case R_PPC_DTPREL16:
7325 case R_PPC_DTPREL16_LO:
7326 case R_PPC_DTPREL16_HI:
7327 case R_PPC_DTPREL16_HA:
7328 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7329 break;
7330
7331 /* Relocations that may need to be propagated if this is a shared
7332 object. */
7333 case R_PPC_TPREL16:
7334 case R_PPC_TPREL16_LO:
7335 case R_PPC_TPREL16_HI:
7336 case R_PPC_TPREL16_HA:
7337 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7338 /* The TPREL16 relocs shouldn't really be used in shared
7339 libs as they will result in DT_TEXTREL being set, but
7340 support them anyway. */
7341 goto dodyn;
7342
7343 case R_PPC_TPREL32:
7344 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7345 goto dodyn;
7346
7347 case R_PPC_DTPREL32:
7348 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7349 goto dodyn;
7350
7351 case R_PPC_DTPMOD32:
7352 relocation = 1;
7353 addend = 0;
7354 goto dodyn;
7355
7356 case R_PPC_REL16:
7357 case R_PPC_REL16_LO:
7358 case R_PPC_REL16_HI:
7359 case R_PPC_REL16_HA:
7360 break;
7361
7362 case R_PPC_REL32:
7363 if (h == NULL || h == htab->elf.hgot)
7364 break;
7365 /* fall through */
7366
7367 case R_PPC_ADDR32:
7368 case R_PPC_ADDR16:
7369 case R_PPC_ADDR16_LO:
7370 case R_PPC_ADDR16_HI:
7371 case R_PPC_ADDR16_HA:
7372 case R_PPC_UADDR32:
7373 case R_PPC_UADDR16:
7374 goto dodyn;
7375
7376 case R_PPC_REL24:
7377 case R_PPC_REL14:
7378 case R_PPC_REL14_BRTAKEN:
7379 case R_PPC_REL14_BRNTAKEN:
7380 /* If these relocations are not to a named symbol, they can be
7381 handled right here, no need to bother the dynamic linker. */
7382 if (SYMBOL_CALLS_LOCAL (info, h)
7383 || h == htab->elf.hgot)
7384 break;
7385 /* fall through */
7386
7387 case R_PPC_ADDR24:
7388 case R_PPC_ADDR14:
7389 case R_PPC_ADDR14_BRTAKEN:
7390 case R_PPC_ADDR14_BRNTAKEN:
7391 if (h != NULL && !info->shared)
7392 break;
7393 /* fall through */
7394
7395 dodyn:
7396 if ((input_section->flags & SEC_ALLOC) == 0
7397 || is_vxworks_tls)
7398 break;
7399
7400 if ((info->shared
7401 && !(h != NULL
7402 && ((h->root.type == bfd_link_hash_undefined
7403 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7404 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7405 || (h->root.type == bfd_link_hash_undefweak
7406 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7407 && (must_be_dyn_reloc (info, r_type)
7408 || !SYMBOL_CALLS_LOCAL (info, h)))
7409 || (ELIMINATE_COPY_RELOCS
7410 && !info->shared
7411 && h != NULL
7412 && h->dynindx != -1
7413 && !h->non_got_ref
7414 && !h->def_regular))
7415 {
7416 int skip;
7417
7418 #ifdef DEBUG
7419 fprintf (stderr, "ppc_elf_relocate_section needs to "
7420 "create relocation for %s\n",
7421 (h && h->root.root.string
7422 ? h->root.root.string : "<unknown>"));
7423 #endif
7424
7425 /* When generating a shared object, these relocations
7426 are copied into the output file to be resolved at run
7427 time. */
7428 if (sreloc == NULL)
7429 {
7430 sreloc = elf_section_data (input_section)->sreloc;
7431 if (!htab->elf.dynamic_sections_created)
7432 sreloc = htab->reliplt;
7433 if (sreloc == NULL)
7434 return FALSE;
7435 }
7436
7437 skip = 0;
7438 outrel.r_offset =
7439 _bfd_elf_section_offset (output_bfd, info, input_section,
7440 rel->r_offset);
7441 if (outrel.r_offset == (bfd_vma) -1
7442 || outrel.r_offset == (bfd_vma) -2)
7443 skip = (int) outrel.r_offset;
7444 outrel.r_offset += (input_section->output_section->vma
7445 + input_section->output_offset);
7446
7447 if (skip)
7448 memset (&outrel, 0, sizeof outrel);
7449 else if ((h != NULL
7450 && (h->root.type == bfd_link_hash_undefined
7451 || h->root.type == bfd_link_hash_undefweak))
7452 || !SYMBOL_REFERENCES_LOCAL (info, h))
7453 {
7454 unresolved_reloc = FALSE;
7455 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7456 outrel.r_addend = rel->r_addend;
7457 }
7458 else
7459 {
7460 outrel.r_addend = relocation + rel->r_addend;
7461
7462 if (r_type != R_PPC_ADDR32)
7463 {
7464 long indx = 0;
7465
7466 if (ifunc != NULL)
7467 {
7468 /* If we get here when building a static
7469 executable, then the libc startup function
7470 responsible for applying indirect function
7471 relocations is going to complain about
7472 the reloc type.
7473 If we get here when building a dynamic
7474 executable, it will be because we have
7475 a text relocation. The dynamic loader
7476 will set the text segment writable and
7477 non-executable to apply text relocations.
7478 So we'll segfault when trying to run the
7479 indirection function to resolve the reloc. */
7480 (*_bfd_error_handler)
7481 (_("%B(%A+0x%lx): relocation %s for indirect "
7482 "function %s unsupported"),
7483 input_bfd,
7484 input_section,
7485 (long) rel->r_offset,
7486 howto->name,
7487 sym_name);
7488 ret = FALSE;
7489 }
7490 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7491 ;
7492 else if (sec == NULL || sec->owner == NULL)
7493 {
7494 bfd_set_error (bfd_error_bad_value);
7495 ret = FALSE;
7496 }
7497 else
7498 {
7499 asection *osec;
7500
7501 /* We are turning this relocation into one
7502 against a section symbol. It would be
7503 proper to subtract the symbol's value,
7504 osec->vma, from the emitted reloc addend,
7505 but ld.so expects buggy relocs.
7506 FIXME: Why not always use a zero index? */
7507 osec = sec->output_section;
7508 indx = elf_section_data (osec)->dynindx;
7509 if (indx == 0)
7510 {
7511 osec = htab->elf.text_index_section;
7512 indx = elf_section_data (osec)->dynindx;
7513 }
7514 BFD_ASSERT (indx != 0);
7515 #ifdef DEBUG
7516 if (indx == 0)
7517 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7518 indx, osec->name, osec->flags,
7519 h->root.root.string);
7520 #endif
7521 }
7522
7523 outrel.r_info = ELF32_R_INFO (indx, r_type);
7524 }
7525 else if (ifunc != NULL)
7526 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7527 else
7528 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7529 }
7530
7531 loc = sreloc->contents;
7532 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7533 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7534
7535 if (skip == -1)
7536 continue;
7537
7538 /* This reloc will be computed at runtime. We clear the memory
7539 so that it contains predictable value. */
7540 if (! skip
7541 && ((input_section->flags & SEC_ALLOC) != 0
7542 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7543 {
7544 relocation = howto->pc_relative ? outrel.r_offset : 0;
7545 addend = 0;
7546 break;
7547 }
7548 }
7549 break;
7550
7551 case R_PPC_RELAX32PC_PLT:
7552 case R_PPC_RELAX32_PLT:
7553 if (h != NULL)
7554 {
7555 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7556 info->shared ? addend : 0);
7557 if (htab->plt_type == PLT_NEW)
7558 relocation = (htab->glink->output_section->vma
7559 + htab->glink->output_offset
7560 + ent->glink_offset);
7561 else
7562 relocation = (htab->plt->output_section->vma
7563 + htab->plt->output_offset
7564 + ent->plt.offset);
7565 }
7566 if (r_type == R_PPC_RELAX32_PLT)
7567 goto relax32;
7568 /* Fall thru */
7569
7570 case R_PPC_RELAX32PC:
7571 relocation -= (input_section->output_section->vma
7572 + input_section->output_offset
7573 + rel->r_offset - 4);
7574 /* Fall thru */
7575
7576 case R_PPC_RELAX32:
7577 relax32:
7578 {
7579 unsigned long t0;
7580 unsigned long t1;
7581
7582 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7583 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7584
7585 /* We're clearing the bits for R_PPC_ADDR16_HA
7586 and R_PPC_ADDR16_LO here. */
7587 t0 &= ~0xffff;
7588 t1 &= ~0xffff;
7589
7590 /* t0 is HA, t1 is LO */
7591 relocation += addend;
7592 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7593 t1 |= relocation & 0xffff;
7594
7595 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7596 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7597
7598 /* Rewrite the reloc and convert one of the trailing nop
7599 relocs to describe this relocation. */
7600 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7601 /* The relocs are at the bottom 2 bytes */
7602 rel[0].r_offset += 2;
7603 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7604 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7605 rel[1].r_offset += 4;
7606 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7607 rel++;
7608 }
7609 continue;
7610
7611 /* Indirect .sdata relocation. */
7612 case R_PPC_EMB_SDAI16:
7613 BFD_ASSERT (htab->sdata[0].section != NULL);
7614 relocation
7615 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7616 h, relocation, rel);
7617 break;
7618
7619 /* Indirect .sdata2 relocation. */
7620 case R_PPC_EMB_SDA2I16:
7621 BFD_ASSERT (htab->sdata[1].section != NULL);
7622 relocation
7623 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7624 h, relocation, rel);
7625 break;
7626
7627 /* Handle the TOC16 reloc. We want to use the offset within the .got
7628 section, not the actual VMA. This is appropriate when generating
7629 an embedded ELF object, for which the .got section acts like the
7630 AIX .toc section. */
7631 case R_PPC_TOC16: /* phony GOT16 relocations */
7632 if (sec == NULL || sec->output_section == NULL)
7633 {
7634 unresolved_reloc = TRUE;
7635 break;
7636 }
7637 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7638 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7639
7640 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7641 break;
7642
7643 case R_PPC_PLTREL24:
7644 if (h == NULL || ifunc != NULL)
7645 break;
7646 /* Relocation is to the entry for this symbol in the
7647 procedure linkage table. */
7648 {
7649 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7650 info->shared ? addend : 0);
7651 addend = 0;
7652 if (ent == NULL
7653 || htab->plt == NULL)
7654 {
7655 /* We didn't make a PLT entry for this symbol. This
7656 happens when statically linking PIC code, or when
7657 using -Bsymbolic. */
7658 break;
7659 }
7660
7661 unresolved_reloc = FALSE;
7662 if (htab->plt_type == PLT_NEW)
7663 relocation = (htab->glink->output_section->vma
7664 + htab->glink->output_offset
7665 + ent->glink_offset);
7666 else
7667 relocation = (htab->plt->output_section->vma
7668 + htab->plt->output_offset
7669 + ent->plt.offset);
7670 }
7671 break;
7672
7673 /* Relocate against _SDA_BASE_. */
7674 case R_PPC_SDAREL16:
7675 {
7676 const char *name;
7677
7678 if (sec == NULL || sec->output_section == NULL)
7679 {
7680 unresolved_reloc = TRUE;
7681 break;
7682 }
7683
7684 name = bfd_get_section_name (abfd, sec->output_section);
7685 if (! ((CONST_STRNEQ (name, ".sdata")
7686 && (name[6] == 0 || name[6] == '.'))
7687 || (CONST_STRNEQ (name, ".sbss")
7688 && (name[5] == 0 || name[5] == '.'))))
7689 {
7690 (*_bfd_error_handler)
7691 (_("%B: the target (%s) of a %s relocation is "
7692 "in the wrong output section (%s)"),
7693 input_bfd,
7694 sym_name,
7695 howto->name,
7696 name);
7697 }
7698 addend -= SYM_VAL (htab->sdata[0].sym);
7699 }
7700 break;
7701
7702 /* Relocate against _SDA2_BASE_. */
7703 case R_PPC_EMB_SDA2REL:
7704 {
7705 const char *name;
7706
7707 if (sec == NULL || sec->output_section == NULL)
7708 {
7709 unresolved_reloc = TRUE;
7710 break;
7711 }
7712
7713 name = bfd_get_section_name (abfd, sec->output_section);
7714 if (! (CONST_STRNEQ (name, ".sdata2")
7715 || CONST_STRNEQ (name, ".sbss2")))
7716 {
7717 (*_bfd_error_handler)
7718 (_("%B: the target (%s) of a %s relocation is "
7719 "in the wrong output section (%s)"),
7720 input_bfd,
7721 sym_name,
7722 howto->name,
7723 name);
7724
7725 bfd_set_error (bfd_error_bad_value);
7726 ret = FALSE;
7727 continue;
7728 }
7729 addend -= SYM_VAL (htab->sdata[1].sym);
7730 }
7731 break;
7732
7733 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7734 case R_PPC_EMB_SDA21:
7735 case R_PPC_EMB_RELSDA:
7736 {
7737 const char *name;
7738 int reg;
7739
7740 if (sec == NULL || sec->output_section == NULL)
7741 {
7742 unresolved_reloc = TRUE;
7743 break;
7744 }
7745
7746 name = bfd_get_section_name (abfd, sec->output_section);
7747 if (((CONST_STRNEQ (name, ".sdata")
7748 && (name[6] == 0 || name[6] == '.'))
7749 || (CONST_STRNEQ (name, ".sbss")
7750 && (name[5] == 0 || name[5] == '.'))))
7751 {
7752 reg = 13;
7753 addend -= SYM_VAL (htab->sdata[0].sym);
7754 }
7755 else if (CONST_STRNEQ (name, ".sdata2")
7756 || CONST_STRNEQ (name, ".sbss2"))
7757 {
7758 reg = 2;
7759 addend -= SYM_VAL (htab->sdata[1].sym);
7760 }
7761 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7762 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7763 {
7764 reg = 0;
7765 }
7766 else
7767 {
7768 (*_bfd_error_handler)
7769 (_("%B: the target (%s) of a %s relocation is "
7770 "in the wrong output section (%s)"),
7771 input_bfd,
7772 sym_name,
7773 howto->name,
7774 name);
7775
7776 bfd_set_error (bfd_error_bad_value);
7777 ret = FALSE;
7778 continue;
7779 }
7780
7781 if (r_type == R_PPC_EMB_SDA21)
7782 { /* fill in register field */
7783 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7784 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7785 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7786 }
7787 }
7788 break;
7789
7790 /* Relocate against the beginning of the section. */
7791 case R_PPC_SECTOFF:
7792 case R_PPC_SECTOFF_LO:
7793 case R_PPC_SECTOFF_HI:
7794 case R_PPC_SECTOFF_HA:
7795 if (sec == NULL || sec->output_section == NULL)
7796 {
7797 unresolved_reloc = TRUE;
7798 break;
7799 }
7800 addend -= sec->output_section->vma;
7801 break;
7802
7803 /* Negative relocations. */
7804 case R_PPC_EMB_NADDR32:
7805 case R_PPC_EMB_NADDR16:
7806 case R_PPC_EMB_NADDR16_LO:
7807 case R_PPC_EMB_NADDR16_HI:
7808 case R_PPC_EMB_NADDR16_HA:
7809 addend -= 2 * relocation;
7810 break;
7811
7812 case R_PPC_COPY:
7813 case R_PPC_GLOB_DAT:
7814 case R_PPC_JMP_SLOT:
7815 case R_PPC_RELATIVE:
7816 case R_PPC_IRELATIVE:
7817 case R_PPC_PLT32:
7818 case R_PPC_PLTREL32:
7819 case R_PPC_PLT16_LO:
7820 case R_PPC_PLT16_HI:
7821 case R_PPC_PLT16_HA:
7822 case R_PPC_ADDR30:
7823 case R_PPC_EMB_RELSEC16:
7824 case R_PPC_EMB_RELST_LO:
7825 case R_PPC_EMB_RELST_HI:
7826 case R_PPC_EMB_RELST_HA:
7827 case R_PPC_EMB_BIT_FLD:
7828 (*_bfd_error_handler)
7829 (_("%B: relocation %s is not yet supported for symbol %s."),
7830 input_bfd,
7831 howto->name,
7832 sym_name);
7833
7834 bfd_set_error (bfd_error_invalid_operation);
7835 ret = FALSE;
7836 continue;
7837 }
7838
7839 /* Do any further special processing. */
7840 switch (r_type)
7841 {
7842 default:
7843 break;
7844
7845 case R_PPC_ADDR16_HA:
7846 case R_PPC_REL16_HA:
7847 case R_PPC_SECTOFF_HA:
7848 case R_PPC_TPREL16_HA:
7849 case R_PPC_DTPREL16_HA:
7850 case R_PPC_EMB_NADDR16_HA:
7851 case R_PPC_EMB_RELST_HA:
7852 /* It's just possible that this symbol is a weak symbol
7853 that's not actually defined anywhere. In that case,
7854 'sec' would be NULL, and we should leave the symbol
7855 alone (it will be set to zero elsewhere in the link). */
7856 if (sec == NULL)
7857 break;
7858 /* Fall thru */
7859
7860 case R_PPC_PLT16_HA:
7861 case R_PPC_GOT16_HA:
7862 case R_PPC_GOT_TLSGD16_HA:
7863 case R_PPC_GOT_TLSLD16_HA:
7864 case R_PPC_GOT_TPREL16_HA:
7865 case R_PPC_GOT_DTPREL16_HA:
7866 /* Add 0x10000 if sign bit in 0:15 is set.
7867 Bits 0:15 are not used. */
7868 addend += 0x8000;
7869 break;
7870 }
7871
7872 #ifdef DEBUG
7873 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7874 "offset = %ld, addend = %ld\n",
7875 howto->name,
7876 (int) r_type,
7877 sym_name,
7878 r_symndx,
7879 (long) rel->r_offset,
7880 (long) addend);
7881 #endif
7882
7883 if (unresolved_reloc
7884 && !((input_section->flags & SEC_DEBUGGING) != 0
7885 && h->def_dynamic))
7886 {
7887 (*_bfd_error_handler)
7888 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7889 input_bfd,
7890 input_section,
7891 (long) rel->r_offset,
7892 howto->name,
7893 sym_name);
7894 ret = FALSE;
7895 }
7896
7897 r = _bfd_final_link_relocate (howto,
7898 input_bfd,
7899 input_section,
7900 contents,
7901 rel->r_offset,
7902 relocation,
7903 addend);
7904
7905 if (r != bfd_reloc_ok)
7906 {
7907 if (r == bfd_reloc_overflow)
7908 {
7909 if (warned)
7910 continue;
7911 if (h != NULL
7912 && h->root.type == bfd_link_hash_undefweak
7913 && howto->pc_relative)
7914 {
7915 /* Assume this is a call protected by other code that
7916 detect the symbol is undefined. If this is the case,
7917 we can safely ignore the overflow. If not, the
7918 program is hosed anyway, and a little warning isn't
7919 going to help. */
7920
7921 continue;
7922 }
7923
7924 if (! (*info->callbacks->reloc_overflow) (info,
7925 (h ? &h->root : NULL),
7926 sym_name,
7927 howto->name,
7928 rel->r_addend,
7929 input_bfd,
7930 input_section,
7931 rel->r_offset))
7932 return FALSE;
7933 }
7934 else
7935 {
7936 (*_bfd_error_handler)
7937 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7938 input_bfd, input_section,
7939 (long) rel->r_offset, howto->name, sym_name, (int) r);
7940 ret = FALSE;
7941 }
7942 }
7943 }
7944
7945 #ifdef DEBUG
7946 fprintf (stderr, "\n");
7947 #endif
7948
7949 return ret;
7950 }
7951 \f
7952 /* Finish up dynamic symbol handling. We set the contents of various
7953 dynamic sections here. */
7954
7955 static bfd_boolean
7956 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7957 struct bfd_link_info *info,
7958 struct elf_link_hash_entry *h,
7959 Elf_Internal_Sym *sym)
7960 {
7961 struct ppc_elf_link_hash_table *htab;
7962 struct plt_entry *ent;
7963 bfd_boolean doneone;
7964
7965 #ifdef DEBUG
7966 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7967 h->root.root.string);
7968 #endif
7969
7970 htab = ppc_elf_hash_table (info);
7971 BFD_ASSERT (htab->elf.dynobj != NULL);
7972
7973 doneone = FALSE;
7974 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7975 if (ent->plt.offset != (bfd_vma) -1)
7976 {
7977 if (!doneone)
7978 {
7979 Elf_Internal_Rela rela;
7980 bfd_byte *loc;
7981 bfd_vma reloc_index;
7982
7983 if (htab->plt_type == PLT_NEW
7984 || !htab->elf.dynamic_sections_created
7985 || h->dynindx == -1)
7986 reloc_index = ent->plt.offset / 4;
7987 else
7988 {
7989 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7990 / htab->plt_slot_size);
7991 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7992 && htab->plt_type == PLT_OLD)
7993 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7994 }
7995
7996 /* This symbol has an entry in the procedure linkage table.
7997 Set it up. */
7998 if (htab->plt_type == PLT_VXWORKS
7999 && htab->elf.dynamic_sections_created
8000 && h->dynindx != -1)
8001 {
8002 bfd_vma got_offset;
8003 const bfd_vma *plt_entry;
8004
8005 /* The first three entries in .got.plt are reserved. */
8006 got_offset = (reloc_index + 3) * 4;
8007
8008 /* Use the right PLT. */
8009 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8010 : ppc_elf_vxworks_plt_entry;
8011
8012 /* Fill in the .plt on VxWorks. */
8013 if (info->shared)
8014 {
8015 bfd_put_32 (output_bfd,
8016 plt_entry[0] | PPC_HA (got_offset),
8017 htab->plt->contents + ent->plt.offset + 0);
8018 bfd_put_32 (output_bfd,
8019 plt_entry[1] | PPC_LO (got_offset),
8020 htab->plt->contents + ent->plt.offset + 4);
8021 }
8022 else
8023 {
8024 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8025
8026 bfd_put_32 (output_bfd,
8027 plt_entry[0] | PPC_HA (got_loc),
8028 htab->plt->contents + ent->plt.offset + 0);
8029 bfd_put_32 (output_bfd,
8030 plt_entry[1] | PPC_LO (got_loc),
8031 htab->plt->contents + ent->plt.offset + 4);
8032 }
8033
8034 bfd_put_32 (output_bfd, plt_entry[2],
8035 htab->plt->contents + ent->plt.offset + 8);
8036 bfd_put_32 (output_bfd, plt_entry[3],
8037 htab->plt->contents + ent->plt.offset + 12);
8038
8039 /* This instruction is an immediate load. The value loaded is
8040 the byte offset of the R_PPC_JMP_SLOT relocation from the
8041 start of the .rela.plt section. The value is stored in the
8042 low-order 16 bits of the load instruction. */
8043 /* NOTE: It appears that this is now an index rather than a
8044 prescaled offset. */
8045 bfd_put_32 (output_bfd,
8046 plt_entry[4] | reloc_index,
8047 htab->plt->contents + ent->plt.offset + 16);
8048 /* This instruction is a PC-relative branch whose target is
8049 the start of the PLT section. The address of this branch
8050 instruction is 20 bytes beyond the start of this PLT entry.
8051 The address is encoded in bits 6-29, inclusive. The value
8052 stored is right-shifted by two bits, permitting a 26-bit
8053 offset. */
8054 bfd_put_32 (output_bfd,
8055 (plt_entry[5]
8056 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8057 htab->plt->contents + ent->plt.offset + 20);
8058 bfd_put_32 (output_bfd, plt_entry[6],
8059 htab->plt->contents + ent->plt.offset + 24);
8060 bfd_put_32 (output_bfd, plt_entry[7],
8061 htab->plt->contents + ent->plt.offset + 28);
8062
8063 /* Fill in the GOT entry corresponding to this PLT slot with
8064 the address immediately after the the "bctr" instruction
8065 in this PLT entry. */
8066 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8067 + htab->plt->output_offset
8068 + ent->plt.offset + 16),
8069 htab->sgotplt->contents + got_offset);
8070
8071 if (!info->shared)
8072 {
8073 /* Fill in a couple of entries in .rela.plt.unloaded. */
8074 loc = htab->srelplt2->contents
8075 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8076 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8077 * sizeof (Elf32_External_Rela));
8078
8079 /* Provide the @ha relocation for the first instruction. */
8080 rela.r_offset = (htab->plt->output_section->vma
8081 + htab->plt->output_offset
8082 + ent->plt.offset + 2);
8083 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8084 R_PPC_ADDR16_HA);
8085 rela.r_addend = got_offset;
8086 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8087 loc += sizeof (Elf32_External_Rela);
8088
8089 /* Provide the @l relocation for the second instruction. */
8090 rela.r_offset = (htab->plt->output_section->vma
8091 + htab->plt->output_offset
8092 + ent->plt.offset + 6);
8093 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8094 R_PPC_ADDR16_LO);
8095 rela.r_addend = got_offset;
8096 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8097 loc += sizeof (Elf32_External_Rela);
8098
8099 /* Provide a relocation for the GOT entry corresponding to this
8100 PLT slot. Point it at the middle of the .plt entry. */
8101 rela.r_offset = (htab->sgotplt->output_section->vma
8102 + htab->sgotplt->output_offset
8103 + got_offset);
8104 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8105 R_PPC_ADDR32);
8106 rela.r_addend = ent->plt.offset + 16;
8107 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8108 }
8109
8110 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8111 In particular, the offset for the relocation is not the
8112 address of the PLT entry for this function, as specified
8113 by the ABI. Instead, the offset is set to the address of
8114 the GOT slot for this function. See EABI 4.4.4.1. */
8115 rela.r_offset = (htab->sgotplt->output_section->vma
8116 + htab->sgotplt->output_offset
8117 + got_offset);
8118
8119 }
8120 else
8121 {
8122 asection *splt = htab->plt;
8123 if (!htab->elf.dynamic_sections_created
8124 || h->dynindx == -1)
8125 splt = htab->iplt;
8126
8127 rela.r_offset = (splt->output_section->vma
8128 + splt->output_offset
8129 + ent->plt.offset);
8130 if (htab->plt_type == PLT_OLD
8131 || !htab->elf.dynamic_sections_created
8132 || h->dynindx == -1)
8133 {
8134 /* We don't need to fill in the .plt. The ppc dynamic
8135 linker will fill it in. */
8136 }
8137 else
8138 {
8139 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8140 + htab->glink->output_section->vma
8141 + htab->glink->output_offset);
8142 bfd_put_32 (output_bfd, val,
8143 splt->contents + ent->plt.offset);
8144 }
8145 }
8146
8147 /* Fill in the entry in the .rela.plt section. */
8148 rela.r_addend = 0;
8149 if (!htab->elf.dynamic_sections_created
8150 || h->dynindx == -1)
8151 {
8152 BFD_ASSERT (h->type == STT_GNU_IFUNC
8153 && h->def_regular
8154 && (h->root.type == bfd_link_hash_defined
8155 || h->root.type == bfd_link_hash_defweak));
8156 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8157 rela.r_addend = SYM_VAL (h);
8158 }
8159 else
8160 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8161
8162 if (!htab->elf.dynamic_sections_created
8163 || h->dynindx == -1)
8164 loc = (htab->reliplt->contents
8165 + (htab->reliplt->reloc_count++
8166 * sizeof (Elf32_External_Rela)));
8167 else
8168 loc = (htab->relplt->contents
8169 + reloc_index * sizeof (Elf32_External_Rela));
8170 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8171
8172 if (!h->def_regular)
8173 {
8174 /* Mark the symbol as undefined, rather than as
8175 defined in the .plt section. Leave the value if
8176 there were any relocations where pointer equality
8177 matters (this is a clue for the dynamic linker, to
8178 make function pointer comparisons work between an
8179 application and shared library), otherwise set it
8180 to zero. */
8181 sym->st_shndx = SHN_UNDEF;
8182 if (!h->pointer_equality_needed)
8183 sym->st_value = 0;
8184 else if (!h->ref_regular_nonweak)
8185 {
8186 /* This breaks function pointer comparisons, but
8187 that is better than breaking tests for a NULL
8188 function pointer. */
8189 sym->st_value = 0;
8190 }
8191 }
8192 else if (h->type == STT_GNU_IFUNC
8193 && !info->shared)
8194 {
8195 /* Set the value of ifunc symbols in a non-pie
8196 executable to the glink entry. This is to avoid
8197 text relocations. We can't do this for ifunc in
8198 allocate_dynrelocs, as we do for normal dynamic
8199 function symbols with plt entries, because we need
8200 to keep the original value around for the ifunc
8201 relocation. */
8202 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8203 (output_bfd, htab->glink->output_section));
8204 sym->st_value = (ent->glink_offset +
8205 htab->glink->output_offset
8206 + htab->glink->output_section->vma);
8207 }
8208 doneone = TRUE;
8209 }
8210
8211 if (htab->plt_type == PLT_NEW
8212 || !htab->elf.dynamic_sections_created
8213 || h->dynindx == -1)
8214 {
8215 asection *splt = htab->plt;
8216 if (!htab->elf.dynamic_sections_created
8217 || h->dynindx == -1)
8218 splt = htab->iplt;
8219
8220 write_glink_stub (ent, splt, info);
8221
8222 if (!info->shared)
8223 /* We only need one non-PIC glink stub. */
8224 break;
8225 }
8226 else
8227 break;
8228 }
8229
8230 if (h->needs_copy)
8231 {
8232 asection *s;
8233 Elf_Internal_Rela rela;
8234 bfd_byte *loc;
8235
8236 /* This symbols needs a copy reloc. Set it up. */
8237
8238 #ifdef DEBUG
8239 fprintf (stderr, ", copy");
8240 #endif
8241
8242 BFD_ASSERT (h->dynindx != -1);
8243
8244 if (ppc_elf_hash_entry (h)->has_sda_refs)
8245 s = htab->relsbss;
8246 else
8247 s = htab->relbss;
8248 BFD_ASSERT (s != NULL);
8249
8250 rela.r_offset = SYM_VAL (h);
8251 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8252 rela.r_addend = 0;
8253 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8254 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8255 }
8256
8257 #ifdef DEBUG
8258 fprintf (stderr, "\n");
8259 #endif
8260
8261 /* Mark some specially defined symbols as absolute. */
8262 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8263 || (!htab->is_vxworks
8264 && (h == htab->elf.hgot
8265 || strcmp (h->root.root.string,
8266 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8267 sym->st_shndx = SHN_ABS;
8268
8269 return TRUE;
8270 }
8271 \f
8272 static enum elf_reloc_type_class
8273 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8274 {
8275 switch (ELF32_R_TYPE (rela->r_info))
8276 {
8277 case R_PPC_RELATIVE:
8278 return reloc_class_relative;
8279 case R_PPC_REL24:
8280 case R_PPC_ADDR24:
8281 case R_PPC_JMP_SLOT:
8282 return reloc_class_plt;
8283 case R_PPC_COPY:
8284 return reloc_class_copy;
8285 default:
8286 return reloc_class_normal;
8287 }
8288 }
8289 \f
8290 /* Finish up the dynamic sections. */
8291
8292 static bfd_boolean
8293 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8294 struct bfd_link_info *info)
8295 {
8296 asection *sdyn;
8297 asection *splt;
8298 struct ppc_elf_link_hash_table *htab;
8299 bfd_vma got;
8300 bfd *dynobj;
8301 bfd_boolean ret = TRUE;
8302
8303 #ifdef DEBUG
8304 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8305 #endif
8306
8307 htab = ppc_elf_hash_table (info);
8308 dynobj = elf_hash_table (info)->dynobj;
8309 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8310 if (htab->is_vxworks)
8311 splt = bfd_get_section_by_name (dynobj, ".plt");
8312 else
8313 splt = NULL;
8314
8315 got = 0;
8316 if (htab->elf.hgot != NULL)
8317 got = SYM_VAL (htab->elf.hgot);
8318
8319 if (htab->elf.dynamic_sections_created)
8320 {
8321 Elf32_External_Dyn *dyncon, *dynconend;
8322
8323 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8324
8325 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8326 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8327 for (; dyncon < dynconend; dyncon++)
8328 {
8329 Elf_Internal_Dyn dyn;
8330 asection *s;
8331
8332 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8333
8334 switch (dyn.d_tag)
8335 {
8336 case DT_PLTGOT:
8337 if (htab->is_vxworks)
8338 s = htab->sgotplt;
8339 else
8340 s = htab->plt;
8341 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8342 break;
8343
8344 case DT_PLTRELSZ:
8345 dyn.d_un.d_val = htab->relplt->size;
8346 break;
8347
8348 case DT_JMPREL:
8349 s = htab->relplt;
8350 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8351 break;
8352
8353 case DT_PPC_GOT:
8354 dyn.d_un.d_ptr = got;
8355 break;
8356
8357 case DT_RELASZ:
8358 if (htab->is_vxworks)
8359 {
8360 if (htab->relplt)
8361 dyn.d_un.d_ptr -= htab->relplt->size;
8362 break;
8363 }
8364 continue;
8365
8366 default:
8367 if (htab->is_vxworks
8368 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8369 break;
8370 continue;
8371 }
8372
8373 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8374 }
8375 }
8376
8377 if (htab->got != NULL)
8378 {
8379 if (htab->elf.hgot->root.u.def.section == htab->got
8380 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8381 {
8382 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8383
8384 p += htab->elf.hgot->root.u.def.value;
8385 if (htab->plt_type == PLT_OLD)
8386 {
8387 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8388 so that a function can easily find the address of
8389 _GLOBAL_OFFSET_TABLE_. */
8390 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8391 < htab->elf.hgot->root.u.def.section->size);
8392 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8393 }
8394
8395 if (sdyn != NULL)
8396 {
8397 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8398 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8399 < htab->elf.hgot->root.u.def.section->size);
8400 bfd_put_32 (output_bfd, val, p);
8401 }
8402 }
8403 else
8404 {
8405 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8406 htab->elf.hgot->root.root.string,
8407 (htab->sgotplt != NULL
8408 ? htab->sgotplt->name : htab->got->name));
8409 bfd_set_error (bfd_error_bad_value);
8410 ret = FALSE;
8411 }
8412
8413 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8414 }
8415
8416 /* Fill in the first entry in the VxWorks procedure linkage table. */
8417 if (splt && splt->size > 0)
8418 {
8419 /* Use the right PLT. */
8420 static const bfd_vma *plt_entry = NULL;
8421 plt_entry = info->shared ?
8422 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8423
8424 if (!info->shared)
8425 {
8426 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8427
8428 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8429 splt->contents + 0);
8430 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8431 splt->contents + 4);
8432 }
8433 else
8434 {
8435 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8436 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8437 }
8438 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8439 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8440 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8441 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8442 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8443 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8444
8445 if (! info->shared)
8446 {
8447 Elf_Internal_Rela rela;
8448 bfd_byte *loc;
8449
8450 loc = htab->srelplt2->contents;
8451
8452 /* Output the @ha relocation for the first instruction. */
8453 rela.r_offset = (htab->plt->output_section->vma
8454 + htab->plt->output_offset
8455 + 2);
8456 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8457 rela.r_addend = 0;
8458 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8459 loc += sizeof (Elf32_External_Rela);
8460
8461 /* Output the @l relocation for the second instruction. */
8462 rela.r_offset = (htab->plt->output_section->vma
8463 + htab->plt->output_offset
8464 + 6);
8465 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8466 rela.r_addend = 0;
8467 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8468 loc += sizeof (Elf32_External_Rela);
8469
8470 /* Fix up the remaining relocations. They may have the wrong
8471 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8472 in which symbols were output. */
8473 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8474 {
8475 Elf_Internal_Rela rel;
8476
8477 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8478 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8479 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8480 loc += sizeof (Elf32_External_Rela);
8481
8482 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8483 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8484 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8485 loc += sizeof (Elf32_External_Rela);
8486
8487 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8488 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8489 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8490 loc += sizeof (Elf32_External_Rela);
8491 }
8492 }
8493 }
8494
8495 if (htab->glink != NULL
8496 && htab->glink->contents != NULL
8497 && htab->elf.dynamic_sections_created)
8498 {
8499 unsigned char *p;
8500 unsigned char *endp;
8501 bfd_vma res0;
8502 unsigned int i;
8503
8504 /*
8505 * PIC glink code is the following:
8506 *
8507 * # ith PLT code stub.
8508 * addis 11,30,(plt+(i-1)*4-got)@ha
8509 * lwz 11,(plt+(i-1)*4-got)@l(11)
8510 * mtctr 11
8511 * bctr
8512 *
8513 * # A table of branches, one for each plt entry.
8514 * # The idea is that the plt call stub loads ctr and r11 with these
8515 * # addresses, so (r11 - res_0) gives the plt index * 4.
8516 * res_0: b PLTresolve
8517 * res_1: b PLTresolve
8518 * .
8519 * # Some number of entries towards the end can be nops
8520 * res_n_m3: nop
8521 * res_n_m2: nop
8522 * res_n_m1:
8523 *
8524 * PLTresolve:
8525 * addis 11,11,(1f-res_0)@ha
8526 * mflr 0
8527 * bcl 20,31,1f
8528 * 1: addi 11,11,(1b-res_0)@l
8529 * mflr 12
8530 * mtlr 0
8531 * sub 11,11,12 # r11 = index * 4
8532 * addis 12,12,(got+4-1b)@ha
8533 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8534 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8535 * mtctr 0
8536 * add 0,11,11
8537 * add 11,0,11 # r11 = index * 12 = reloc offset.
8538 * bctr
8539 */
8540 static const unsigned int pic_plt_resolve[] =
8541 {
8542 ADDIS_11_11,
8543 MFLR_0,
8544 BCL_20_31,
8545 ADDI_11_11,
8546 MFLR_12,
8547 MTLR_0,
8548 SUB_11_11_12,
8549 ADDIS_12_12,
8550 LWZ_0_12,
8551 LWZ_12_12,
8552 MTCTR_0,
8553 ADD_0_11_11,
8554 ADD_11_0_11,
8555 BCTR,
8556 NOP,
8557 NOP
8558 };
8559
8560 /*
8561 * Non-PIC glink code is a little simpler.
8562 *
8563 * # ith PLT code stub.
8564 * lis 11,(plt+(i-1)*4)@ha
8565 * lwz 11,(plt+(i-1)*4)@l(11)
8566 * mtctr 11
8567 * bctr
8568 *
8569 * The branch table is the same, then comes
8570 *
8571 * PLTresolve:
8572 * lis 12,(got+4)@ha
8573 * addis 11,11,(-res_0)@ha
8574 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8575 * addi 11,11,(-res_0)@l # r11 = index * 4
8576 * mtctr 0
8577 * add 0,11,11
8578 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8579 * add 11,0,11 # r11 = index * 12 = reloc offset.
8580 * bctr
8581 */
8582 static const unsigned int plt_resolve[] =
8583 {
8584 LIS_12,
8585 ADDIS_11_11,
8586 LWZ_0_12,
8587 ADDI_11_11,
8588 MTCTR_0,
8589 ADD_0_11_11,
8590 LWZ_12_12,
8591 ADD_11_0_11,
8592 BCTR,
8593 NOP,
8594 NOP,
8595 NOP,
8596 NOP,
8597 NOP,
8598 NOP,
8599 NOP
8600 };
8601
8602 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8603 abort ();
8604 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8605 abort ();
8606
8607 /* Build the branch table, one for each plt entry (less one),
8608 and perhaps some padding. */
8609 p = htab->glink->contents;
8610 p += htab->glink_pltresolve;
8611 endp = htab->glink->contents;
8612 endp += htab->glink->size - GLINK_PLTRESOLVE;
8613 while (p < endp - 8 * 4)
8614 {
8615 bfd_put_32 (output_bfd, B + endp - p, p);
8616 p += 4;
8617 }
8618 while (p < endp)
8619 {
8620 bfd_put_32 (output_bfd, NOP, p);
8621 p += 4;
8622 }
8623
8624 res0 = (htab->glink_pltresolve
8625 + htab->glink->output_section->vma
8626 + htab->glink->output_offset);
8627
8628 /* Last comes the PLTresolve stub. */
8629 if (info->shared)
8630 {
8631 bfd_vma bcl;
8632
8633 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8634 {
8635 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8636 p += 4;
8637 }
8638 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8639
8640 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8641 + htab->glink->output_section->vma
8642 + htab->glink->output_offset);
8643
8644 bfd_put_32 (output_bfd,
8645 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8646 bfd_put_32 (output_bfd,
8647 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8648 bfd_put_32 (output_bfd,
8649 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8650 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8651 {
8652 bfd_put_32 (output_bfd,
8653 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8654 bfd_put_32 (output_bfd,
8655 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8656 }
8657 else
8658 {
8659 bfd_put_32 (output_bfd,
8660 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8661 bfd_put_32 (output_bfd,
8662 LWZ_12_12 + 4, p + 9*4);
8663 }
8664 }
8665 else
8666 {
8667 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8668 {
8669 bfd_put_32 (output_bfd, plt_resolve[i], p);
8670 p += 4;
8671 }
8672 p -= 4 * ARRAY_SIZE (plt_resolve);
8673
8674 bfd_put_32 (output_bfd,
8675 LIS_12 + PPC_HA (got + 4), p + 0*4);
8676 bfd_put_32 (output_bfd,
8677 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8678 bfd_put_32 (output_bfd,
8679 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8680 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8681 {
8682 bfd_put_32 (output_bfd,
8683 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8684 bfd_put_32 (output_bfd,
8685 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8686 }
8687 else
8688 {
8689 bfd_put_32 (output_bfd,
8690 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8691 bfd_put_32 (output_bfd,
8692 LWZ_12_12 + 4, p + 6*4);
8693 }
8694 }
8695 }
8696
8697 return ret;
8698 }
8699 \f
8700 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8701 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8702 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8703 #define TARGET_BIG_NAME "elf32-powerpc"
8704 #define ELF_ARCH bfd_arch_powerpc
8705 #define ELF_MACHINE_CODE EM_PPC
8706 #ifdef __QNXTARGET__
8707 #define ELF_MAXPAGESIZE 0x1000
8708 #else
8709 #define ELF_MAXPAGESIZE 0x10000
8710 #endif
8711 #define ELF_MINPAGESIZE 0x1000
8712 #define ELF_COMMONPAGESIZE 0x1000
8713 #define elf_info_to_howto ppc_elf_info_to_howto
8714
8715 #ifdef EM_CYGNUS_POWERPC
8716 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8717 #endif
8718
8719 #ifdef EM_PPC_OLD
8720 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8721 #endif
8722
8723 #define elf_backend_plt_not_loaded 1
8724 #define elf_backend_can_gc_sections 1
8725 #define elf_backend_can_refcount 1
8726 #define elf_backend_rela_normal 1
8727
8728 #define bfd_elf32_mkobject ppc_elf_mkobject
8729 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8730 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8731 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8732 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8733 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8734 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8735 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8736
8737 #define elf_backend_object_p ppc_elf_object_p
8738 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8739 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8740 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8741 #define elf_backend_relocate_section ppc_elf_relocate_section
8742 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8743 #define elf_backend_check_relocs ppc_elf_check_relocs
8744 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8745 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8746 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8747 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8748 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8749 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8750 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8751 #define elf_backend_fake_sections ppc_elf_fake_sections
8752 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8753 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8754 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8755 #define elf_backend_write_core_note ppc_elf_write_core_note
8756 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8757 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8758 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8759 #define elf_backend_write_section ppc_elf_write_section
8760 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8761 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8762 #define elf_backend_action_discarded ppc_elf_action_discarded
8763 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8764 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8765
8766 #include "elf32-target.h"
8767
8768 /* VxWorks Target */
8769
8770 #undef TARGET_LITTLE_SYM
8771 #undef TARGET_LITTLE_NAME
8772
8773 #undef TARGET_BIG_SYM
8774 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8775 #undef TARGET_BIG_NAME
8776 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8777
8778 /* VxWorks uses the elf default section flags for .plt. */
8779 static const struct bfd_elf_special_section *
8780 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8781 {
8782 if (sec->name == NULL)
8783 return NULL;
8784
8785 if (strcmp (sec->name, ".plt") == 0)
8786 return _bfd_elf_get_sec_type_attr (abfd, sec);
8787
8788 return ppc_elf_get_sec_type_attr (abfd, sec);
8789 }
8790
8791 /* Like ppc_elf_link_hash_table_create, but overrides
8792 appropriately for VxWorks. */
8793 static struct bfd_link_hash_table *
8794 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8795 {
8796 struct bfd_link_hash_table *ret;
8797
8798 ret = ppc_elf_link_hash_table_create (abfd);
8799 if (ret)
8800 {
8801 struct ppc_elf_link_hash_table *htab
8802 = (struct ppc_elf_link_hash_table *)ret;
8803 htab->is_vxworks = 1;
8804 htab->plt_type = PLT_VXWORKS;
8805 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8806 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8807 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8808 }
8809 return ret;
8810 }
8811
8812 /* Tweak magic VxWorks symbols as they are loaded. */
8813 static bfd_boolean
8814 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8815 struct bfd_link_info *info,
8816 Elf_Internal_Sym *sym,
8817 const char **namep ATTRIBUTE_UNUSED,
8818 flagword *flagsp ATTRIBUTE_UNUSED,
8819 asection **secp,
8820 bfd_vma *valp)
8821 {
8822 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8823 valp))
8824 return FALSE;
8825
8826 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8827 }
8828
8829 static void
8830 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8831 {
8832 ppc_elf_final_write_processing(abfd, linker);
8833 elf_vxworks_final_write_processing(abfd, linker);
8834 }
8835
8836 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8837 define it. */
8838 #undef elf_backend_want_plt_sym
8839 #define elf_backend_want_plt_sym 1
8840 #undef elf_backend_want_got_plt
8841 #define elf_backend_want_got_plt 1
8842 #undef elf_backend_got_symbol_offset
8843 #define elf_backend_got_symbol_offset 0
8844 #undef elf_backend_plt_not_loaded
8845 #define elf_backend_plt_not_loaded 0
8846 #undef elf_backend_plt_readonly
8847 #define elf_backend_plt_readonly 1
8848 #undef elf_backend_got_header_size
8849 #define elf_backend_got_header_size 12
8850
8851 #undef bfd_elf32_get_synthetic_symtab
8852
8853 #undef bfd_elf32_bfd_link_hash_table_create
8854 #define bfd_elf32_bfd_link_hash_table_create \
8855 ppc_elf_vxworks_link_hash_table_create
8856 #undef elf_backend_add_symbol_hook
8857 #define elf_backend_add_symbol_hook \
8858 ppc_elf_vxworks_add_symbol_hook
8859 #undef elf_backend_link_output_symbol_hook
8860 #define elf_backend_link_output_symbol_hook \
8861 elf_vxworks_link_output_symbol_hook
8862 #undef elf_backend_final_write_processing
8863 #define elf_backend_final_write_processing \
8864 ppc_elf_vxworks_final_write_processing
8865 #undef elf_backend_get_sec_type_attr
8866 #define elf_backend_get_sec_type_attr \
8867 ppc_elf_vxworks_get_sec_type_attr
8868 #undef elf_backend_emit_relocs
8869 #define elf_backend_emit_relocs \
8870 elf_vxworks_emit_relocs
8871
8872 #undef elf32_bed
8873 #define elf32_bed ppc_elf_vxworks_bed
8874 #undef elf_backend_post_process_headers
8875
8876 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.279252 seconds and 5 git commands to generate.