projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* elflink.c (_bfd_elf_adjust_dynamic_symbol): Don't clear plt
[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
3584 /* We may also need a plt entry if the symbol turns out to be
3585 an ifunc. */
3586 if (h != NULL && !info->shared)
3587 {
3588 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3589 return FALSE;
3590 }
3591 break;
3592
3593 /* Indirect .sdata relocation. */
3594 case R_PPC_EMB_SDAI16:
3595 if (info->shared)
3596 {
3597 bad_shared_reloc (abfd, r_type);
3598 return FALSE;
3599 }
3600 if (htab->sdata[0].section == NULL
3601 && !ppc_elf_create_linker_section (abfd, info, 0,
3602 &htab->sdata[0]))
3603 return FALSE;
3604 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3605 h, rel))
3606 return FALSE;
3607 if (h != NULL)
3608 {
3609 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3610 h->non_got_ref = TRUE;
3611 }
3612 break;
3613
3614 /* Indirect .sdata2 relocation. */
3615 case R_PPC_EMB_SDA2I16:
3616 if (info->shared)
3617 {
3618 bad_shared_reloc (abfd, r_type);
3619 return FALSE;
3620 }
3621 if (htab->sdata[1].section == NULL
3622 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3623 &htab->sdata[1]))
3624 return FALSE;
3625 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3626 h, rel))
3627 return FALSE;
3628 if (h != NULL)
3629 {
3630 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3631 h->non_got_ref = TRUE;
3632 }
3633 break;
3634
3635 case R_PPC_SDAREL16:
3636 if (info->shared)
3637 {
3638 bad_shared_reloc (abfd, r_type);
3639 return FALSE;
3640 }
3641 if (htab->sdata[0].sym == NULL
3642 && !create_sdata_sym (htab, &htab->sdata[0]))
3643 return FALSE;
3644 if (h != NULL)
3645 {
3646 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3647 h->non_got_ref = TRUE;
3648 }
3649 break;
3650
3651 case R_PPC_EMB_SDA2REL:
3652 if (info->shared)
3653 {
3654 bad_shared_reloc (abfd, r_type);
3655 return FALSE;
3656 }
3657 if (htab->sdata[1].sym == NULL
3658 && !create_sdata_sym (htab, &htab->sdata[1]))
3659 return FALSE;
3660 if (h != NULL)
3661 {
3662 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3663 h->non_got_ref = TRUE;
3664 }
3665 break;
3666
3667 case R_PPC_EMB_SDA21:
3668 case R_PPC_EMB_RELSDA:
3669 if (info->shared)
3670 {
3671 bad_shared_reloc (abfd, r_type);
3672 return FALSE;
3673 }
3674 if (htab->sdata[0].sym == NULL
3675 && !create_sdata_sym (htab, &htab->sdata[0]))
3676 return FALSE;
3677 if (htab->sdata[1].sym == NULL
3678 && !create_sdata_sym (htab, &htab->sdata[1]))
3679 return FALSE;
3680 if (h != NULL)
3681 {
3682 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3683 h->non_got_ref = TRUE;
3684 }
3685 break;
3686
3687 case R_PPC_EMB_NADDR32:
3688 case R_PPC_EMB_NADDR16:
3689 case R_PPC_EMB_NADDR16_LO:
3690 case R_PPC_EMB_NADDR16_HI:
3691 case R_PPC_EMB_NADDR16_HA:
3692 if (info->shared)
3693 {
3694 bad_shared_reloc (abfd, r_type);
3695 return FALSE;
3696 }
3697 if (h != NULL)
3698 h->non_got_ref = TRUE;
3699 break;
3700
3701 case R_PPC_PLTREL24:
3702 if (h == NULL)
3703 break;
3704 /* Fall through */
3705 case R_PPC_PLT32:
3706 case R_PPC_PLTREL32:
3707 case R_PPC_PLT16_LO:
3708 case R_PPC_PLT16_HI:
3709 case R_PPC_PLT16_HA:
3710 #ifdef DEBUG
3711 fprintf (stderr, "Reloc requires a PLT entry\n");
3712 #endif
3713 /* This symbol requires a procedure linkage table entry. We
3714 actually build the entry in finish_dynamic_symbol,
3715 because this might be a case of linking PIC code without
3716 linking in any dynamic objects, in which case we don't
3717 need to generate a procedure linkage table after all. */
3718
3719 if (h == NULL)
3720 {
3721 /* It does not make sense to have a procedure linkage
3722 table entry for a local symbol. */
3723 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3724 "local symbol"),
3725 abfd,
3726 sec,
3727 (long) rel->r_offset,
3728 ppc_elf_howto_table[r_type]->name);
3729 bfd_set_error (bfd_error_bad_value);
3730 return FALSE;
3731 }
3732 else
3733 {
3734 bfd_vma addend = 0;
3735
3736 if (r_type == R_PPC_PLTREL24)
3737 {
3738 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3739 if (info->shared)
3740 addend = rel->r_addend;
3741 }
3742 h->needs_plt = 1;
3743 if (!update_plt_info (abfd, &h->plt.plist,
3744 addend < 32768 ? NULL : got2, addend))
3745 return FALSE;
3746 }
3747 break;
3748
3749 /* The following relocations don't need to propagate the
3750 relocation if linking a shared object since they are
3751 section relative. */
3752 case R_PPC_SECTOFF:
3753 case R_PPC_SECTOFF_LO:
3754 case R_PPC_SECTOFF_HI:
3755 case R_PPC_SECTOFF_HA:
3756 case R_PPC_DTPREL16:
3757 case R_PPC_DTPREL16_LO:
3758 case R_PPC_DTPREL16_HI:
3759 case R_PPC_DTPREL16_HA:
3760 case R_PPC_TOC16:
3761 break;
3762
3763 case R_PPC_REL16:
3764 case R_PPC_REL16_LO:
3765 case R_PPC_REL16_HI:
3766 case R_PPC_REL16_HA:
3767 ppc_elf_tdata (abfd)->has_rel16 = 1;
3768 break;
3769
3770 /* These are just markers. */
3771 case R_PPC_TLS:
3772 case R_PPC_EMB_MRKREF:
3773 case R_PPC_NONE:
3774 case R_PPC_max:
3775 case R_PPC_RELAX32:
3776 case R_PPC_RELAX32PC:
3777 case R_PPC_RELAX32_PLT:
3778 case R_PPC_RELAX32PC_PLT:
3779 break;
3780
3781 /* These should only appear in dynamic objects. */
3782 case R_PPC_COPY:
3783 case R_PPC_GLOB_DAT:
3784 case R_PPC_JMP_SLOT:
3785 case R_PPC_RELATIVE:
3786 case R_PPC_IRELATIVE:
3787 break;
3788
3789 /* These aren't handled yet. We'll report an error later. */
3790 case R_PPC_ADDR30:
3791 case R_PPC_EMB_RELSEC16:
3792 case R_PPC_EMB_RELST_LO:
3793 case R_PPC_EMB_RELST_HI:
3794 case R_PPC_EMB_RELST_HA:
3795 case R_PPC_EMB_BIT_FLD:
3796 break;
3797
3798 /* This refers only to functions defined in the shared library. */
3799 case R_PPC_LOCAL24PC:
3800 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3801 {
3802 htab->plt_type = PLT_OLD;
3803 htab->old_bfd = abfd;
3804 }
3805 break;
3806
3807 /* This relocation describes the C++ object vtable hierarchy.
3808 Reconstruct it for later use during GC. */
3809 case R_PPC_GNU_VTINHERIT:
3810 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3811 return FALSE;
3812 break;
3813
3814 /* This relocation describes which C++ vtable entries are actually
3815 used. Record for later use during GC. */
3816 case R_PPC_GNU_VTENTRY:
3817 BFD_ASSERT (h != NULL);
3818 if (h != NULL
3819 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3820 return FALSE;
3821 break;
3822
3823 /* We shouldn't really be seeing these. */
3824 case R_PPC_TPREL32:
3825 case R_PPC_TPREL16:
3826 case R_PPC_TPREL16_LO:
3827 case R_PPC_TPREL16_HI:
3828 case R_PPC_TPREL16_HA:
3829 if (!info->executable)
3830 info->flags |= DF_STATIC_TLS;
3831 goto dodyn;
3832
3833 /* Nor these. */
3834 case R_PPC_DTPMOD32:
3835 case R_PPC_DTPREL32:
3836 goto dodyn;
3837
3838 case R_PPC_REL32:
3839 if (h == NULL
3840 && got2 != NULL
3841 && (sec->flags & SEC_CODE) != 0
3842 && info->shared
3843 && htab->plt_type == PLT_UNSET)
3844 {
3845 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3846 the start of a function, which assembles to a REL32
3847 reference to .got2. If we detect one of these, then
3848 force the old PLT layout because the linker cannot
3849 reliably deduce the GOT pointer value needed for
3850 PLT call stubs. */
3851 asection *s;
3852 Elf_Internal_Sym *isym;
3853
3854 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3855 abfd, r_symndx);
3856 if (isym == NULL)
3857 return FALSE;
3858
3859 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3860 if (s == got2)
3861 {
3862 htab->plt_type = PLT_OLD;
3863 htab->old_bfd = abfd;
3864 }
3865 }
3866 if (h == NULL || h == htab->elf.hgot)
3867 break;
3868 /* fall through */
3869
3870 case R_PPC_ADDR32:
3871 case R_PPC_ADDR16:
3872 case R_PPC_ADDR16_LO:
3873 case R_PPC_ADDR16_HI:
3874 case R_PPC_ADDR16_HA:
3875 case R_PPC_UADDR32:
3876 case R_PPC_UADDR16:
3877 if (h != NULL && !info->shared)
3878 {
3879 /* We may need a plt entry if the symbol turns out to be
3880 a function defined in a dynamic object. */
3881 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3882 return FALSE;
3883
3884 /* We may need a copy reloc too. */
3885 h->non_got_ref = 1;
3886 h->pointer_equality_needed = 1;
3887 }
3888 goto dodyn;
3889
3890 case R_PPC_REL24:
3891 case R_PPC_REL14:
3892 case R_PPC_REL14_BRTAKEN:
3893 case R_PPC_REL14_BRNTAKEN:
3894 if (h == NULL)
3895 break;
3896 if (h == htab->elf.hgot)
3897 {
3898 if (htab->plt_type == PLT_UNSET)
3899 {
3900 htab->plt_type = PLT_OLD;
3901 htab->old_bfd = abfd;
3902 }
3903 break;
3904 }
3905 /* fall through */
3906
3907 case R_PPC_ADDR24:
3908 case R_PPC_ADDR14:
3909 case R_PPC_ADDR14_BRTAKEN:
3910 case R_PPC_ADDR14_BRNTAKEN:
3911 if (h != NULL && !info->shared)
3912 {
3913 /* We may need a plt entry if the symbol turns out to be
3914 a function defined in a dynamic object. */
3915 h->needs_plt = 1;
3916 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3917 return FALSE;
3918 break;
3919 }
3920
3921 dodyn:
3922 /* If we are creating a shared library, and this is a reloc
3923 against a global symbol, or a non PC relative reloc
3924 against a local symbol, then we need to copy the reloc
3925 into the shared library. However, if we are linking with
3926 -Bsymbolic, we do not need to copy a reloc against a
3927 global symbol which is defined in an object we are
3928 including in the link (i.e., DEF_REGULAR is set). At
3929 this point we have not seen all the input files, so it is
3930 possible that DEF_REGULAR is not set now but will be set
3931 later (it is never cleared). In case of a weak definition,
3932 DEF_REGULAR may be cleared later by a strong definition in
3933 a shared library. We account for that possibility below by
3934 storing information in the dyn_relocs field of the hash
3935 table entry. A similar situation occurs when creating
3936 shared libraries and symbol visibility changes render the
3937 symbol local.
3938
3939 If on the other hand, we are creating an executable, we
3940 may need to keep relocations for symbols satisfied by a
3941 dynamic library if we manage to avoid copy relocs for the
3942 symbol. */
3943 if ((info->shared
3944 && (must_be_dyn_reloc (info, r_type)
3945 || (h != NULL
3946 && (! info->symbolic
3947 || h->root.type == bfd_link_hash_defweak
3948 || !h->def_regular))))
3949 || (ELIMINATE_COPY_RELOCS
3950 && !info->shared
3951 && h != NULL
3952 && (h->root.type == bfd_link_hash_defweak
3953 || !h->def_regular)))
3954 {
3955 struct ppc_elf_dyn_relocs *p;
3956 struct ppc_elf_dyn_relocs **head;
3957
3958 #ifdef DEBUG
3959 fprintf (stderr,
3960 "ppc_elf_check_relocs needs to "
3961 "create relocation for %s\n",
3962 (h && h->root.root.string
3963 ? h->root.root.string : "<unknown>"));
3964 #endif
3965 if (sreloc == NULL)
3966 {
3967 if (htab->elf.dynobj == NULL)
3968 htab->elf.dynobj = abfd;
3969
3970 sreloc = _bfd_elf_make_dynamic_reloc_section
3971 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3972
3973 if (sreloc == NULL)
3974 return FALSE;
3975 }
3976
3977 /* If this is a global symbol, we count the number of
3978 relocations we need for this symbol. */
3979 if (h != NULL)
3980 {
3981 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3982 }
3983 else
3984 {
3985 /* Track dynamic relocs needed for local syms too.
3986 We really need local syms available to do this
3987 easily. Oh well. */
3988 asection *s;
3989 void *vpp;
3990 Elf_Internal_Sym *isym;
3991
3992 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3993 abfd, r_symndx);
3994 if (isym == NULL)
3995 return FALSE;
3996
3997 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3998 if (s == NULL)
3999 s = sec;
4000
4001 vpp = &elf_section_data (s)->local_dynrel;
4002 head = (struct ppc_elf_dyn_relocs **) vpp;
4003 }
4004
4005 p = *head;
4006 if (p == NULL || p->sec != sec)
4007 {
4008 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4009 if (p == NULL)
4010 return FALSE;
4011 p->next = *head;
4012 *head = p;
4013 p->sec = sec;
4014 p->count = 0;
4015 p->pc_count = 0;
4016 }
4017
4018 p->count += 1;
4019 if (!must_be_dyn_reloc (info, r_type))
4020 p->pc_count += 1;
4021 }
4022
4023 break;
4024 }
4025 }
4026
4027 return TRUE;
4028 }
4029 \f
4030
4031 /* Merge object attributes from IBFD into OBFD. Raise an error if
4032 there are conflicting attributes. */
4033 static bfd_boolean
4034 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4035 {
4036 obj_attribute *in_attr, *in_attrs;
4037 obj_attribute *out_attr, *out_attrs;
4038
4039 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4040 {
4041 /* This is the first object. Copy the attributes. */
4042 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4043
4044 /* Use the Tag_null value to indicate the attributes have been
4045 initialized. */
4046 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4047
4048 return TRUE;
4049 }
4050
4051 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4052 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4053
4054 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4055 non-conflicting ones. */
4056 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4057 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4058 if (in_attr->i != out_attr->i)
4059 {
4060 out_attr->type = 1;
4061 if (out_attr->i == 0)
4062 out_attr->i = in_attr->i;
4063 else if (in_attr->i == 0)
4064 ;
4065 else if (out_attr->i == 1 && in_attr->i == 2)
4066 _bfd_error_handler
4067 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4068 else if (out_attr->i == 1 && in_attr->i == 3)
4069 _bfd_error_handler
4070 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4071 obfd, ibfd);
4072 else if (out_attr->i == 3 && in_attr->i == 1)
4073 _bfd_error_handler
4074 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4075 ibfd, obfd);
4076 else if (out_attr->i == 3 && in_attr->i == 2)
4077 _bfd_error_handler
4078 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4079 ibfd, obfd);
4080 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4081 _bfd_error_handler
4082 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4083 else if (in_attr->i > 3)
4084 _bfd_error_handler
4085 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4086 in_attr->i);
4087 else
4088 _bfd_error_handler
4089 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4090 out_attr->i);
4091 }
4092
4093 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4094 merge non-conflicting ones. */
4095 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4096 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4097 if (in_attr->i != out_attr->i)
4098 {
4099 const char *in_abi = NULL, *out_abi = NULL;
4100
4101 switch (in_attr->i)
4102 {
4103 case 1: in_abi = "generic"; break;
4104 case 2: in_abi = "AltiVec"; break;
4105 case 3: in_abi = "SPE"; break;
4106 }
4107
4108 switch (out_attr->i)
4109 {
4110 case 1: out_abi = "generic"; break;
4111 case 2: out_abi = "AltiVec"; break;
4112 case 3: out_abi = "SPE"; break;
4113 }
4114
4115 out_attr->type = 1;
4116 if (out_attr->i == 0)
4117 out_attr->i = in_attr->i;
4118 else if (in_attr->i == 0)
4119 ;
4120 /* For now, allow generic to transition to AltiVec or SPE
4121 without a warning. If GCC marked files with their stack
4122 alignment and used don't-care markings for files which are
4123 not affected by the vector ABI, we could warn about this
4124 case too. */
4125 else if (out_attr->i == 1)
4126 out_attr->i = in_attr->i;
4127 else if (in_attr->i == 1)
4128 ;
4129 else if (in_abi == NULL)
4130 _bfd_error_handler
4131 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4132 in_attr->i);
4133 else if (out_abi == NULL)
4134 _bfd_error_handler
4135 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4136 in_attr->i);
4137 else
4138 _bfd_error_handler
4139 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4140 ibfd, obfd, in_abi, out_abi);
4141 }
4142
4143 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4144 and merge non-conflicting ones. */
4145 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4146 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4147 if (in_attr->i != out_attr->i)
4148 {
4149 out_attr->type = 1;
4150 if (out_attr->i == 0)
4151 out_attr->i = in_attr->i;
4152 else if (in_attr->i == 0)
4153 ;
4154 else if (out_attr->i == 1 && in_attr->i == 2)
4155 _bfd_error_handler
4156 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4157 else if (out_attr->i == 2 && in_attr->i == 1)
4158 _bfd_error_handler
4159 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4160 else if (in_attr->i > 2)
4161 _bfd_error_handler
4162 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4163 in_attr->i);
4164 else
4165 _bfd_error_handler
4166 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4167 out_attr->i);
4168 }
4169
4170 /* Merge Tag_compatibility attributes and any common GNU ones. */
4171 _bfd_elf_merge_object_attributes (ibfd, obfd);
4172
4173 return TRUE;
4174 }
4175
4176 /* Merge backend specific data from an object file to the output
4177 object file when linking. */
4178
4179 static bfd_boolean
4180 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4181 {
4182 flagword old_flags;
4183 flagword new_flags;
4184 bfd_boolean error;
4185
4186 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4187 return TRUE;
4188
4189 /* Check if we have the same endianess. */
4190 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4191 return FALSE;
4192
4193 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4194 return FALSE;
4195
4196 new_flags = elf_elfheader (ibfd)->e_flags;
4197 old_flags = elf_elfheader (obfd)->e_flags;
4198 if (!elf_flags_init (obfd))
4199 {
4200 /* First call, no flags set. */
4201 elf_flags_init (obfd) = TRUE;
4202 elf_elfheader (obfd)->e_flags = new_flags;
4203 }
4204
4205 /* Compatible flags are ok. */
4206 else if (new_flags == old_flags)
4207 ;
4208
4209 /* Incompatible flags. */
4210 else
4211 {
4212 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4213 to be linked with either. */
4214 error = FALSE;
4215 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4216 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4217 {
4218 error = TRUE;
4219 (*_bfd_error_handler)
4220 (_("%B: compiled with -mrelocatable and linked with "
4221 "modules compiled normally"), ibfd);
4222 }
4223 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4224 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4225 {
4226 error = TRUE;
4227 (*_bfd_error_handler)
4228 (_("%B: compiled normally and linked with "
4229 "modules compiled with -mrelocatable"), ibfd);
4230 }
4231
4232 /* The output is -mrelocatable-lib iff both the input files are. */
4233 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4234 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4235
4236 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4237 but each input file is either -mrelocatable or -mrelocatable-lib. */
4238 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4239 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4240 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4241 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4242
4243 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4244 any module uses it. */
4245 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4246
4247 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4248 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4249
4250 /* Warn about any other mismatches. */
4251 if (new_flags != old_flags)
4252 {
4253 error = TRUE;
4254 (*_bfd_error_handler)
4255 (_("%B: uses different e_flags (0x%lx) fields "
4256 "than previous modules (0x%lx)"),
4257 ibfd, (long) new_flags, (long) old_flags);
4258 }
4259
4260 if (error)
4261 {
4262 bfd_set_error (bfd_error_bad_value);
4263 return FALSE;
4264 }
4265 }
4266
4267 return TRUE;
4268 }
4269 \f
4270 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4271 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4272 int
4273 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4274 struct bfd_link_info *info,
4275 enum ppc_elf_plt_type plt_style,
4276 int emit_stub_syms)
4277 {
4278 struct ppc_elf_link_hash_table *htab;
4279 flagword flags;
4280
4281 htab = ppc_elf_hash_table (info);
4282
4283 if (htab->plt_type == PLT_UNSET)
4284 {
4285 if (plt_style == PLT_OLD)
4286 htab->plt_type = PLT_OLD;
4287 else
4288 {
4289 bfd *ibfd;
4290 enum ppc_elf_plt_type plt_type = plt_style;
4291
4292 /* Look through the reloc flags left by ppc_elf_check_relocs.
4293 Use the old style bss plt if a file makes plt calls
4294 without using the new relocs, and if ld isn't given
4295 --secure-plt and we never see REL16 relocs. */
4296 if (plt_type == PLT_UNSET)
4297 plt_type = PLT_OLD;
4298 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4299 if (is_ppc_elf (ibfd))
4300 {
4301 if (ppc_elf_tdata (ibfd)->has_rel16)
4302 plt_type = PLT_NEW;
4303 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4304 {
4305 plt_type = PLT_OLD;
4306 htab->old_bfd = ibfd;
4307 break;
4308 }
4309 }
4310 htab->plt_type = plt_type;
4311 }
4312 }
4313 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4314 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4315
4316 htab->emit_stub_syms = emit_stub_syms;
4317
4318 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4319
4320 if (htab->plt_type == PLT_NEW)
4321 {
4322 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4323 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4324
4325 /* The new PLT is a loaded section. */
4326 if (htab->plt != NULL
4327 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4328 return -1;
4329
4330 /* The new GOT is not executable. */
4331 if (htab->got != NULL
4332 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4333 return -1;
4334 }
4335 else
4336 {
4337 /* Stop an unused .glink section from affecting .text alignment. */
4338 if (htab->glink != NULL
4339 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4340 return -1;
4341 }
4342 return htab->plt_type == PLT_NEW;
4343 }
4344 \f
4345 /* Return the section that should be marked against GC for a given
4346 relocation. */
4347
4348 static asection *
4349 ppc_elf_gc_mark_hook (asection *sec,
4350 struct bfd_link_info *info,
4351 Elf_Internal_Rela *rel,
4352 struct elf_link_hash_entry *h,
4353 Elf_Internal_Sym *sym)
4354 {
4355 if (h != NULL)
4356 switch (ELF32_R_TYPE (rel->r_info))
4357 {
4358 case R_PPC_GNU_VTINHERIT:
4359 case R_PPC_GNU_VTENTRY:
4360 return NULL;
4361 }
4362
4363 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4364 }
4365
4366 /* Update the got, plt and dynamic reloc reference counts for the
4367 section being removed. */
4368
4369 static bfd_boolean
4370 ppc_elf_gc_sweep_hook (bfd *abfd,
4371 struct bfd_link_info *info,
4372 asection *sec,
4373 const Elf_Internal_Rela *relocs)
4374 {
4375 struct ppc_elf_link_hash_table *htab;
4376 Elf_Internal_Shdr *symtab_hdr;
4377 struct elf_link_hash_entry **sym_hashes;
4378 bfd_signed_vma *local_got_refcounts;
4379 const Elf_Internal_Rela *rel, *relend;
4380 asection *got2;
4381
4382 if (info->relocatable)
4383 return TRUE;
4384
4385 if ((sec->flags & SEC_ALLOC) == 0)
4386 return TRUE;
4387
4388 elf_section_data (sec)->local_dynrel = NULL;
4389
4390 htab = ppc_elf_hash_table (info);
4391 symtab_hdr = &elf_symtab_hdr (abfd);
4392 sym_hashes = elf_sym_hashes (abfd);
4393 local_got_refcounts = elf_local_got_refcounts (abfd);
4394 got2 = bfd_get_section_by_name (abfd, ".got2");
4395
4396 relend = relocs + sec->reloc_count;
4397 for (rel = relocs; rel < relend; rel++)
4398 {
4399 unsigned long r_symndx;
4400 enum elf_ppc_reloc_type r_type;
4401 struct elf_link_hash_entry *h = NULL;
4402
4403 r_symndx = ELF32_R_SYM (rel->r_info);
4404 if (r_symndx >= symtab_hdr->sh_info)
4405 {
4406 struct ppc_elf_dyn_relocs **pp, *p;
4407 struct ppc_elf_link_hash_entry *eh;
4408
4409 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4410 while (h->root.type == bfd_link_hash_indirect
4411 || h->root.type == bfd_link_hash_warning)
4412 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4413 eh = (struct ppc_elf_link_hash_entry *) h;
4414
4415 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4416 if (p->sec == sec)
4417 {
4418 /* Everything must go for SEC. */
4419 *pp = p->next;
4420 break;
4421 }
4422 }
4423
4424 r_type = ELF32_R_TYPE (rel->r_info);
4425 if (!htab->is_vxworks
4426 && h == NULL
4427 && local_got_refcounts != NULL
4428 && (!info->shared
4429 || is_branch_reloc (r_type)))
4430 {
4431 struct plt_entry **local_plt = (struct plt_entry **)
4432 (local_got_refcounts + symtab_hdr->sh_info);
4433 char *local_got_tls_masks = (char *)
4434 (local_plt + symtab_hdr->sh_info);
4435 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4436 {
4437 struct plt_entry **ifunc = local_plt + r_symndx;
4438 bfd_vma addend = 0;
4439 struct plt_entry *ent;
4440
4441 if (r_type == R_PPC_PLTREL24 && info->shared)
4442 addend = rel->r_addend;
4443 ent = find_plt_ent (ifunc, got2, addend);
4444 if (ent->plt.refcount > 0)
4445 ent->plt.refcount -= 1;
4446 continue;
4447 }
4448 }
4449
4450 switch (r_type)
4451 {
4452 case R_PPC_GOT_TLSLD16:
4453 case R_PPC_GOT_TLSLD16_LO:
4454 case R_PPC_GOT_TLSLD16_HI:
4455 case R_PPC_GOT_TLSLD16_HA:
4456 case R_PPC_GOT_TLSGD16:
4457 case R_PPC_GOT_TLSGD16_LO:
4458 case R_PPC_GOT_TLSGD16_HI:
4459 case R_PPC_GOT_TLSGD16_HA:
4460 case R_PPC_GOT_TPREL16:
4461 case R_PPC_GOT_TPREL16_LO:
4462 case R_PPC_GOT_TPREL16_HI:
4463 case R_PPC_GOT_TPREL16_HA:
4464 case R_PPC_GOT_DTPREL16:
4465 case R_PPC_GOT_DTPREL16_LO:
4466 case R_PPC_GOT_DTPREL16_HI:
4467 case R_PPC_GOT_DTPREL16_HA:
4468 case R_PPC_GOT16:
4469 case R_PPC_GOT16_LO:
4470 case R_PPC_GOT16_HI:
4471 case R_PPC_GOT16_HA:
4472 if (h != NULL)
4473 {
4474 if (h->got.refcount > 0)
4475 h->got.refcount--;
4476 if (!info->shared)
4477 {
4478 struct plt_entry *ent;
4479
4480 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4481 if (ent->plt.refcount > 0)
4482 ent->plt.refcount -= 1;
4483 }
4484 }
4485 else if (local_got_refcounts != NULL)
4486 {
4487 if (local_got_refcounts[r_symndx] > 0)
4488 local_got_refcounts[r_symndx]--;
4489 }
4490 break;
4491
4492 case R_PPC_REL24:
4493 case R_PPC_REL14:
4494 case R_PPC_REL14_BRTAKEN:
4495 case R_PPC_REL14_BRNTAKEN:
4496 case R_PPC_REL32:
4497 if (h == NULL || h == htab->elf.hgot)
4498 break;
4499 /* Fall thru */
4500
4501 case R_PPC_ADDR32:
4502 case R_PPC_ADDR24:
4503 case R_PPC_ADDR16:
4504 case R_PPC_ADDR16_LO:
4505 case R_PPC_ADDR16_HI:
4506 case R_PPC_ADDR16_HA:
4507 case R_PPC_ADDR14:
4508 case R_PPC_ADDR14_BRTAKEN:
4509 case R_PPC_ADDR14_BRNTAKEN:
4510 case R_PPC_UADDR32:
4511 case R_PPC_UADDR16:
4512 if (info->shared)
4513 break;
4514
4515 case R_PPC_PLT32:
4516 case R_PPC_PLTREL24:
4517 case R_PPC_PLTREL32:
4518 case R_PPC_PLT16_LO:
4519 case R_PPC_PLT16_HI:
4520 case R_PPC_PLT16_HA:
4521 if (h != NULL)
4522 {
4523 bfd_vma addend = 0;
4524 struct plt_entry *ent;
4525
4526 if (r_type == R_PPC_PLTREL24 && info->shared)
4527 addend = rel->r_addend;
4528 ent = find_plt_ent (&h->plt.plist, got2, addend);
4529 if (ent->plt.refcount > 0)
4530 ent->plt.refcount -= 1;
4531 }
4532 break;
4533
4534 default:
4535 break;
4536 }
4537 }
4538 return TRUE;
4539 }
4540 \f
4541 /* Set plt output section type, htab->tls_get_addr, and call the
4542 generic ELF tls_setup function. */
4543
4544 asection *
4545 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4546 {
4547 struct ppc_elf_link_hash_table *htab;
4548
4549 htab = ppc_elf_hash_table (info);
4550 if (htab->plt_type == PLT_NEW
4551 && htab->plt != NULL
4552 && htab->plt->output_section != NULL)
4553 {
4554 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4555 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4556 }
4557
4558 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4559 FALSE, FALSE, TRUE);
4560 return _bfd_elf_tls_setup (obfd, info);
4561 }
4562
4563 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4564 HASH. */
4565
4566 static bfd_boolean
4567 branch_reloc_hash_match (const bfd *ibfd,
4568 const Elf_Internal_Rela *rel,
4569 const struct elf_link_hash_entry *hash)
4570 {
4571 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4572 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4573 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4574
4575 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4576 {
4577 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4578 struct elf_link_hash_entry *h;
4579
4580 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4581 while (h->root.type == bfd_link_hash_indirect
4582 || h->root.type == bfd_link_hash_warning)
4583 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4584 if (h == hash)
4585 return TRUE;
4586 }
4587 return FALSE;
4588 }
4589
4590 /* Run through all the TLS relocs looking for optimization
4591 opportunities. */
4592
4593 bfd_boolean
4594 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4595 struct bfd_link_info *info)
4596 {
4597 bfd *ibfd;
4598 asection *sec;
4599 struct ppc_elf_link_hash_table *htab;
4600 int pass;
4601
4602 if (info->relocatable || !info->executable)
4603 return TRUE;
4604
4605 htab = ppc_elf_hash_table (info);
4606 /* Make two passes through the relocs. First time check that tls
4607 relocs involved in setting up a tls_get_addr call are indeed
4608 followed by such a call. If they are not, exclude them from
4609 the optimizations done on the second pass. */
4610 for (pass = 0; pass < 2; ++pass)
4611 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4612 {
4613 Elf_Internal_Sym *locsyms = NULL;
4614 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4615
4616 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4617 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4618 {
4619 Elf_Internal_Rela *relstart, *rel, *relend;
4620
4621 /* Read the relocations. */
4622 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4623 info->keep_memory);
4624 if (relstart == NULL)
4625 return FALSE;
4626
4627 relend = relstart + sec->reloc_count;
4628 for (rel = relstart; rel < relend; rel++)
4629 {
4630 enum elf_ppc_reloc_type r_type;
4631 unsigned long r_symndx;
4632 struct elf_link_hash_entry *h = NULL;
4633 char *tls_mask;
4634 char tls_set, tls_clear;
4635 bfd_boolean is_local;
4636 int expecting_tls_get_addr;
4637 bfd_signed_vma *got_count;
4638
4639 r_symndx = ELF32_R_SYM (rel->r_info);
4640 if (r_symndx >= symtab_hdr->sh_info)
4641 {
4642 struct elf_link_hash_entry **sym_hashes;
4643
4644 sym_hashes = elf_sym_hashes (ibfd);
4645 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4646 while (h->root.type == bfd_link_hash_indirect
4647 || h->root.type == bfd_link_hash_warning)
4648 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4649 }
4650
4651 expecting_tls_get_addr = 0;
4652 is_local = FALSE;
4653 if (h == NULL
4654 || !h->def_dynamic)
4655 is_local = TRUE;
4656
4657 r_type = ELF32_R_TYPE (rel->r_info);
4658 switch (r_type)
4659 {
4660 case R_PPC_GOT_TLSLD16:
4661 case R_PPC_GOT_TLSLD16_LO:
4662 expecting_tls_get_addr = 1;
4663 /* Fall thru */
4664
4665 case R_PPC_GOT_TLSLD16_HI:
4666 case R_PPC_GOT_TLSLD16_HA:
4667 /* These relocs should never be against a symbol
4668 defined in a shared lib. Leave them alone if
4669 that turns out to be the case. */
4670 if (!is_local)
4671 continue;
4672
4673 /* LD -> LE */
4674 tls_set = 0;
4675 tls_clear = TLS_LD;
4676 break;
4677
4678 case R_PPC_GOT_TLSGD16:
4679 case R_PPC_GOT_TLSGD16_LO:
4680 expecting_tls_get_addr = 1;
4681 /* Fall thru */
4682
4683 case R_PPC_GOT_TLSGD16_HI:
4684 case R_PPC_GOT_TLSGD16_HA:
4685 if (is_local)
4686 /* GD -> LE */
4687 tls_set = 0;
4688 else
4689 /* GD -> IE */
4690 tls_set = TLS_TLS | TLS_TPRELGD;
4691 tls_clear = TLS_GD;
4692 break;
4693
4694 case R_PPC_GOT_TPREL16:
4695 case R_PPC_GOT_TPREL16_LO:
4696 case R_PPC_GOT_TPREL16_HI:
4697 case R_PPC_GOT_TPREL16_HA:
4698 if (is_local)
4699 {
4700 /* IE -> LE */
4701 tls_set = 0;
4702 tls_clear = TLS_TPREL;
4703 break;
4704 }
4705 else
4706 continue;
4707
4708 default:
4709 continue;
4710 }
4711
4712 if (pass == 0)
4713 {
4714 if (!expecting_tls_get_addr
4715 || !sec->has_tls_get_addr_call)
4716 continue;
4717
4718 if (rel + 1 < relend
4719 && branch_reloc_hash_match (ibfd, rel + 1,
4720 htab->tls_get_addr))
4721 continue;
4722
4723 /* Uh oh, we didn't find the expected call. We
4724 could just mark this symbol to exclude it
4725 from tls optimization but it's safer to skip
4726 the entire section. */
4727 sec->has_tls_reloc = 0;
4728 break;
4729 }
4730
4731 if (h != NULL)
4732 {
4733 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4734 got_count = &h->got.refcount;
4735 }
4736 else
4737 {
4738 Elf_Internal_Sym *sym;
4739 bfd_signed_vma *lgot_refs;
4740 struct plt_entry **local_plt;
4741 char *lgot_masks;
4742
4743 if (locsyms == NULL)
4744 {
4745 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4746 if (locsyms == NULL)
4747 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4748 symtab_hdr->sh_info,
4749 0, NULL, NULL, NULL);
4750 if (locsyms == NULL)
4751 {
4752 if (elf_section_data (sec)->relocs != relstart)
4753 free (relstart);
4754 return FALSE;
4755 }
4756 }
4757 sym = locsyms + r_symndx;
4758 lgot_refs = elf_local_got_refcounts (ibfd);
4759 if (lgot_refs == NULL)
4760 abort ();
4761 local_plt = (struct plt_entry **)
4762 (lgot_refs + symtab_hdr->sh_info);
4763 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4764 tls_mask = &lgot_masks[r_symndx];
4765 got_count = &lgot_refs[r_symndx];
4766 }
4767
4768 if (tls_set == 0)
4769 {
4770 /* We managed to get rid of a got entry. */
4771 if (*got_count > 0)
4772 *got_count -= 1;
4773 }
4774
4775 if (expecting_tls_get_addr)
4776 {
4777 struct plt_entry *ent;
4778
4779 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4780 NULL, 0);
4781 if (ent != NULL && ent->plt.refcount > 0)
4782 ent->plt.refcount -= 1;
4783 }
4784
4785 *tls_mask |= tls_set;
4786 *tls_mask &= ~tls_clear;
4787 }
4788
4789 if (elf_section_data (sec)->relocs != relstart)
4790 free (relstart);
4791 }
4792
4793 if (locsyms != NULL
4794 && (symtab_hdr->contents != (unsigned char *) locsyms))
4795 {
4796 if (!info->keep_memory)
4797 free (locsyms);
4798 else
4799 symtab_hdr->contents = (unsigned char *) locsyms;
4800 }
4801 }
4802 return TRUE;
4803 }
4804 \f
4805 /* Return true if we have dynamic relocs that apply to read-only sections. */
4806
4807 static bfd_boolean
4808 readonly_dynrelocs (struct elf_link_hash_entry *h)
4809 {
4810 struct ppc_elf_dyn_relocs *p;
4811
4812 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4813 {
4814 asection *s = p->sec->output_section;
4815
4816 if (s != NULL
4817 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4818 == (SEC_READONLY | SEC_ALLOC)))
4819 return TRUE;
4820 }
4821 return FALSE;
4822 }
4823
4824 /* Adjust a symbol defined by a dynamic object and referenced by a
4825 regular object. The current definition is in some section of the
4826 dynamic object, but we're not including those sections. We have to
4827 change the definition to something the rest of the link can
4828 understand. */
4829
4830 static bfd_boolean
4831 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4832 struct elf_link_hash_entry *h)
4833 {
4834 struct ppc_elf_link_hash_table *htab;
4835 asection *s;
4836
4837 #ifdef DEBUG
4838 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4839 h->root.root.string);
4840 #endif
4841
4842 /* Make sure we know what is going on here. */
4843 htab = ppc_elf_hash_table (info);
4844 BFD_ASSERT (htab->elf.dynobj != NULL
4845 && (h->needs_plt
4846 || h->type == STT_GNU_IFUNC
4847 || h->u.weakdef != NULL
4848 || (h->def_dynamic
4849 && h->ref_regular
4850 && !h->def_regular)));
4851
4852 /* Deal with function syms. */
4853 if (h->type == STT_FUNC
4854 || h->type == STT_GNU_IFUNC
4855 || h->needs_plt)
4856 {
4857 /* Clear procedure linkage table information for any symbol that
4858 won't need a .plt entry. */
4859 struct plt_entry *ent;
4860 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4861 if (ent->plt.refcount > 0)
4862 break;
4863 if (ent == NULL
4864 || (h->type != STT_GNU_IFUNC
4865 && (SYMBOL_CALLS_LOCAL (info, h)
4866 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4867 && h->root.type == bfd_link_hash_undefweak))))
4868 {
4869 /* A PLT entry is not required/allowed when:
4870
4871 1. We are not using ld.so; because then the PLT entry
4872 can't be set up, so we can't use one. In this case,
4873 ppc_elf_adjust_dynamic_symbol won't even be called.
4874
4875 2. GC has rendered the entry unused.
4876
4877 3. We know for certain that a call to this symbol
4878 will go to this object, or will remain undefined. */
4879 h->plt.plist = NULL;
4880 h->needs_plt = 0;
4881 }
4882 else
4883 {
4884 /* After adjust_dynamic_symbol, non_got_ref set in the
4885 non-shared case means that we have allocated space in
4886 .dynbss for the symbol and thus dyn_relocs for this
4887 symbol should be discarded.
4888 If we get here we know we are making a PLT entry for this
4889 symbol, and in an executable we'd normally resolve
4890 relocations against this symbol to the PLT entry. Allow
4891 dynamic relocs if the reference is weak, and the dynamic
4892 relocs will not cause text relocation. */
4893 if (!h->ref_regular_nonweak
4894 && h->non_got_ref
4895 && h->type != STT_GNU_IFUNC
4896 && !htab->is_vxworks
4897 && !ppc_elf_hash_entry (h)->has_sda_refs
4898 && !readonly_dynrelocs (h))
4899 h->non_got_ref = 0;
4900 }
4901 return TRUE;
4902 }
4903 else
4904 h->plt.plist = NULL;
4905
4906 /* If this is a weak symbol, and there is a real definition, the
4907 processor independent code will have arranged for us to see the
4908 real definition first, and we can just use the same value. */
4909 if (h->u.weakdef != NULL)
4910 {
4911 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4912 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4913 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4914 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4915 if (ELIMINATE_COPY_RELOCS)
4916 h->non_got_ref = h->u.weakdef->non_got_ref;
4917 return TRUE;
4918 }
4919
4920 /* This is a reference to a symbol defined by a dynamic object which
4921 is not a function. */
4922
4923 /* If we are creating a shared library, we must presume that the
4924 only references to the symbol are via the global offset table.
4925 For such cases we need not do anything here; the relocations will
4926 be handled correctly by relocate_section. */
4927 if (info->shared)
4928 return TRUE;
4929
4930 /* If there are no references to this symbol that do not use the
4931 GOT, we don't need to generate a copy reloc. */
4932 if (!h->non_got_ref)
4933 return TRUE;
4934
4935 /* If we didn't find any dynamic relocs in read-only sections, then
4936 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4937 We can't do this if there are any small data relocations. This
4938 doesn't work on VxWorks, where we can not have dynamic
4939 relocations (other than copy and jump slot relocations) in an
4940 executable. */
4941 if (ELIMINATE_COPY_RELOCS
4942 && !ppc_elf_hash_entry (h)->has_sda_refs
4943 && !htab->is_vxworks
4944 && !h->def_regular
4945 && !readonly_dynrelocs (h))
4946 {
4947 h->non_got_ref = 0;
4948 return TRUE;
4949 }
4950
4951 if (h->size == 0)
4952 {
4953 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4954 h->root.root.string);
4955 return TRUE;
4956 }
4957
4958 /* We must allocate the symbol in our .dynbss section, which will
4959 become part of the .bss section of the executable. There will be
4960 an entry for this symbol in the .dynsym section. The dynamic
4961 object will contain position independent code, so all references
4962 from the dynamic object to this symbol will go through the global
4963 offset table. The dynamic linker will use the .dynsym entry to
4964 determine the address it must put in the global offset table, so
4965 both the dynamic object and the regular object will refer to the
4966 same memory location for the variable.
4967
4968 Of course, if the symbol is referenced using SDAREL relocs, we
4969 must instead allocate it in .sbss. */
4970
4971 if (ppc_elf_hash_entry (h)->has_sda_refs)
4972 s = htab->dynsbss;
4973 else
4974 s = htab->dynbss;
4975 BFD_ASSERT (s != NULL);
4976
4977 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4978 copy the initial value out of the dynamic object and into the
4979 runtime process image. We need to remember the offset into the
4980 .rela.bss section we are going to use. */
4981 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4982 {
4983 asection *srel;
4984
4985 if (ppc_elf_hash_entry (h)->has_sda_refs)
4986 srel = htab->relsbss;
4987 else
4988 srel = htab->relbss;
4989 BFD_ASSERT (srel != NULL);
4990 srel->size += sizeof (Elf32_External_Rela);
4991 h->needs_copy = 1;
4992 }
4993
4994 return _bfd_elf_adjust_dynamic_copy (h, s);
4995 }
4996 \f
4997 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4998 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4999 specifying the addend on the plt relocation. For -fpic code, the sym
5000 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5001 xxxxxxxx.got2.plt_pic32.<callee>. */
5002
5003 static bfd_boolean
5004 add_stub_sym (struct plt_entry *ent,
5005 struct elf_link_hash_entry *h,
5006 struct bfd_link_info *info)
5007 {
5008 struct elf_link_hash_entry *sh;
5009 size_t len1, len2, len3;
5010 char *name;
5011 const char *stub;
5012 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5013
5014 if (info->shared)
5015 stub = ".plt_pic32.";
5016 else
5017 stub = ".plt_call32.";
5018
5019 len1 = strlen (h->root.root.string);
5020 len2 = strlen (stub);
5021 len3 = 0;
5022 if (ent->sec)
5023 len3 = strlen (ent->sec->name);
5024 name = bfd_malloc (len1 + len2 + len3 + 9);
5025 if (name == NULL)
5026 return FALSE;
5027 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5028 if (ent->sec)
5029 memcpy (name + 8, ent->sec->name, len3);
5030 memcpy (name + 8 + len3, stub, len2);
5031 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5032 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5033 if (sh == NULL)
5034 return FALSE;
5035 if (sh->root.type == bfd_link_hash_new)
5036 {
5037 sh->root.type = bfd_link_hash_defined;
5038 sh->root.u.def.section = htab->glink;
5039 sh->root.u.def.value = ent->glink_offset;
5040 sh->ref_regular = 1;
5041 sh->def_regular = 1;
5042 sh->ref_regular_nonweak = 1;
5043 sh->forced_local = 1;
5044 sh->non_elf = 0;
5045 }
5046 return TRUE;
5047 }
5048
5049 /* Allocate NEED contiguous space in .got, and return the offset.
5050 Handles allocation of the got header when crossing 32k. */
5051
5052 static bfd_vma
5053 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5054 {
5055 bfd_vma where;
5056 unsigned int max_before_header;
5057
5058 if (htab->plt_type == PLT_VXWORKS)
5059 {
5060 where = htab->got->size;
5061 htab->got->size += need;
5062 }
5063 else
5064 {
5065 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5066 if (need <= htab->got_gap)
5067 {
5068 where = max_before_header - htab->got_gap;
5069 htab->got_gap -= need;
5070 }
5071 else
5072 {
5073 if (htab->got->size + need > max_before_header
5074 && htab->got->size <= max_before_header)
5075 {
5076 htab->got_gap = max_before_header - htab->got->size;
5077 htab->got->size = max_before_header + htab->got_header_size;
5078 }
5079 where = htab->got->size;
5080 htab->got->size += need;
5081 }
5082 }
5083 return where;
5084 }
5085
5086 /* Allocate space in associated reloc sections for dynamic relocs. */
5087
5088 static bfd_boolean
5089 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5090 {
5091 struct bfd_link_info *info = inf;
5092 struct ppc_elf_link_hash_entry *eh;
5093 struct ppc_elf_link_hash_table *htab;
5094 struct ppc_elf_dyn_relocs *p;
5095
5096 if (h->root.type == bfd_link_hash_indirect)
5097 return TRUE;
5098
5099 if (h->root.type == bfd_link_hash_warning)
5100 /* When warning symbols are created, they **replace** the "real"
5101 entry in the hash table, thus we never get to see the real
5102 symbol in a hash traversal. So look at it now. */
5103 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5104
5105 htab = ppc_elf_hash_table (info);
5106 if (htab->elf.dynamic_sections_created
5107 || h->type == STT_GNU_IFUNC)
5108 {
5109 struct plt_entry *ent;
5110 bfd_boolean doneone = FALSE;
5111 bfd_vma plt_offset = 0, glink_offset = 0;
5112 bfd_boolean dyn;
5113
5114 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5115 if (ent->plt.refcount > 0)
5116 {
5117 /* Make sure this symbol is output as a dynamic symbol. */
5118 if (h->dynindx == -1
5119 && !h->forced_local
5120 && !h->def_regular
5121 && htab->elf.dynamic_sections_created)
5122 {
5123 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5124 return FALSE;
5125 }
5126
5127 dyn = htab->elf.dynamic_sections_created;
5128 if (info->shared
5129 || h->type == STT_GNU_IFUNC
5130 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5131 {
5132 asection *s = htab->plt;
5133 if (!dyn || h->dynindx == -1)
5134 s = htab->iplt;
5135
5136 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5137 {
5138 if (!doneone)
5139 {
5140 plt_offset = s->size;
5141 s->size += 4;
5142 }
5143 ent->plt.offset = plt_offset;
5144
5145 s = htab->glink;
5146 if (!doneone || info->shared)
5147 {
5148 glink_offset = s->size;
5149 s->size += GLINK_ENTRY_SIZE;
5150 }
5151 if (!doneone
5152 && !info->shared
5153 && h->def_dynamic
5154 && !h->def_regular)
5155 {
5156 h->root.u.def.section = s;
5157 h->root.u.def.value = glink_offset;
5158 }
5159 ent->glink_offset = glink_offset;
5160
5161 if (htab->emit_stub_syms
5162 && !add_stub_sym (ent, h, info))
5163 return FALSE;
5164 }
5165 else
5166 {
5167 if (!doneone)
5168 {
5169 /* If this is the first .plt entry, make room
5170 for the special first entry. */
5171 if (s->size == 0)
5172 s->size += htab->plt_initial_entry_size;
5173
5174 /* The PowerPC PLT is actually composed of two
5175 parts, the first part is 2 words (for a load
5176 and a jump), and then there is a remaining
5177 word available at the end. */
5178 plt_offset = (htab->plt_initial_entry_size
5179 + (htab->plt_slot_size
5180 * ((s->size
5181 - htab->plt_initial_entry_size)
5182 / htab->plt_entry_size)));
5183
5184 /* If this symbol is not defined in a regular
5185 file, and we are not generating a shared
5186 library, then set the symbol to this location
5187 in the .plt. This is to avoid text
5188 relocations, and is required to make
5189 function pointers compare as equal between
5190 the normal executable and the shared library. */
5191 if (! info->shared
5192 && h->def_dynamic
5193 && !h->def_regular)
5194 {
5195 h->root.u.def.section = s;
5196 h->root.u.def.value = plt_offset;
5197 }
5198
5199 /* Make room for this entry. */
5200 s->size += htab->plt_entry_size;
5201 /* After the 8192nd entry, room for two entries
5202 is allocated. */
5203 if (htab->plt_type == PLT_OLD
5204 && (s->size - htab->plt_initial_entry_size)
5205 / htab->plt_entry_size
5206 > PLT_NUM_SINGLE_ENTRIES)
5207 s->size += htab->plt_entry_size;
5208 }
5209 ent->plt.offset = plt_offset;
5210 }
5211
5212 /* We also need to make an entry in the .rela.plt section. */
5213 if (!doneone)
5214 {
5215 if (!htab->elf.dynamic_sections_created
5216 || h->dynindx == -1)
5217 htab->reliplt->size += sizeof (Elf32_External_Rela);
5218 else
5219 {
5220 htab->relplt->size += sizeof (Elf32_External_Rela);
5221
5222 if (htab->plt_type == PLT_VXWORKS)
5223 {
5224 /* Allocate space for the unloaded relocations. */
5225 if (!info->shared
5226 && htab->elf.dynamic_sections_created)
5227 {
5228 if (ent->plt.offset
5229 == (bfd_vma) htab->plt_initial_entry_size)
5230 {
5231 htab->srelplt2->size
5232 += (sizeof (Elf32_External_Rela)
5233 * VXWORKS_PLTRESOLVE_RELOCS);
5234 }
5235
5236 htab->srelplt2->size
5237 += (sizeof (Elf32_External_Rela)
5238 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5239 }
5240
5241 /* Every PLT entry has an associated GOT entry in
5242 .got.plt. */
5243 htab->sgotplt->size += 4;
5244 }
5245 }
5246 doneone = TRUE;
5247 }
5248 }
5249 else
5250 ent->plt.offset = (bfd_vma) -1;
5251 }
5252 else
5253 ent->plt.offset = (bfd_vma) -1;
5254
5255 if (!doneone)
5256 {
5257 h->plt.plist = NULL;
5258 h->needs_plt = 0;
5259 }
5260 }
5261 else
5262 {
5263 h->plt.plist = NULL;
5264 h->needs_plt = 0;
5265 }
5266
5267 eh = (struct ppc_elf_link_hash_entry *) h;
5268 if (eh->elf.got.refcount > 0)
5269 {
5270 bfd_boolean dyn;
5271 unsigned int need;
5272
5273 /* Make sure this symbol is output as a dynamic symbol. */
5274 if (eh->elf.dynindx == -1
5275 && !eh->elf.forced_local
5276 && eh->elf.type != STT_GNU_IFUNC
5277 && htab->elf.dynamic_sections_created)
5278 {
5279 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5280 return FALSE;
5281 }
5282
5283 need = 0;
5284 if ((eh->tls_mask & TLS_TLS) != 0)
5285 {
5286 if ((eh->tls_mask & TLS_LD) != 0)
5287 {
5288 if (!eh->elf.def_dynamic)
5289 /* We'll just use htab->tlsld_got.offset. This should
5290 always be the case. It's a little odd if we have
5291 a local dynamic reloc against a non-local symbol. */
5292 htab->tlsld_got.refcount += 1;
5293 else
5294 need += 8;
5295 }
5296 if ((eh->tls_mask & TLS_GD) != 0)
5297 need += 8;
5298 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5299 need += 4;
5300 if ((eh->tls_mask & TLS_DTPREL) != 0)
5301 need += 4;
5302 }
5303 else
5304 need += 4;
5305 if (need == 0)
5306 eh->elf.got.offset = (bfd_vma) -1;
5307 else
5308 {
5309 eh->elf.got.offset = allocate_got (htab, need);
5310 dyn = htab->elf.dynamic_sections_created;
5311 if ((info->shared
5312 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5313 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5314 || eh->elf.root.type != bfd_link_hash_undefweak))
5315 {
5316 asection *rsec = htab->relgot;
5317 /* All the entries we allocated need relocs.
5318 Except LD only needs one. */
5319 if ((eh->tls_mask & TLS_LD) != 0
5320 && eh->elf.def_dynamic)
5321 need -= 4;
5322 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5323 }
5324 }
5325 }
5326 else
5327 eh->elf.got.offset = (bfd_vma) -1;
5328
5329 if (eh->dyn_relocs == NULL
5330 || !htab->elf.dynamic_sections_created)
5331 return TRUE;
5332
5333 /* In the shared -Bsymbolic case, discard space allocated for
5334 dynamic pc-relative relocs against symbols which turn out to be
5335 defined in regular objects. For the normal shared case, discard
5336 space for relocs that have become local due to symbol visibility
5337 changes. */
5338
5339 if (info->shared)
5340 {
5341 /* Relocs that use pc_count are those that appear on a call insn,
5342 or certain REL relocs (see must_be_dyn_reloc) that can be
5343 generated via assembly. We want calls to protected symbols to
5344 resolve directly to the function rather than going via the plt.
5345 If people want function pointer comparisons to work as expected
5346 then they should avoid writing weird assembly. */
5347 if (SYMBOL_CALLS_LOCAL (info, h))
5348 {
5349 struct ppc_elf_dyn_relocs **pp;
5350
5351 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5352 {
5353 p->count -= p->pc_count;
5354 p->pc_count = 0;
5355 if (p->count == 0)
5356 *pp = p->next;
5357 else
5358 pp = &p->next;
5359 }
5360 }
5361
5362 if (htab->is_vxworks)
5363 {
5364 struct ppc_elf_dyn_relocs **pp;
5365
5366 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5367 {
5368 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5369 *pp = p->next;
5370 else
5371 pp = &p->next;
5372 }
5373 }
5374
5375 /* Discard relocs on undefined symbols that must be local. */
5376 if (eh->dyn_relocs != NULL
5377 && h->root.type == bfd_link_hash_undefined
5378 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5379 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5380 eh->dyn_relocs = NULL;
5381
5382 /* Also discard relocs on undefined weak syms with non-default
5383 visibility. */
5384 if (eh->dyn_relocs != NULL
5385 && h->root.type == bfd_link_hash_undefweak)
5386 {
5387 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5388 eh->dyn_relocs = NULL;
5389
5390 /* Make sure undefined weak symbols are output as a dynamic
5391 symbol in PIEs. */
5392 else if (h->dynindx == -1
5393 && !h->forced_local
5394 && !h->def_regular)
5395 {
5396 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5397 return FALSE;
5398 }
5399 }
5400 }
5401 else if (ELIMINATE_COPY_RELOCS)
5402 {
5403 /* For the non-shared case, discard space for relocs against
5404 symbols which turn out to need copy relocs or are not
5405 dynamic. */
5406
5407 if (!h->non_got_ref
5408 && !h->def_regular)
5409 {
5410 /* Make sure this symbol is output as a dynamic symbol.
5411 Undefined weak syms won't yet be marked as dynamic. */
5412 if (h->dynindx == -1
5413 && !h->forced_local)
5414 {
5415 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5416 return FALSE;
5417 }
5418
5419 /* If that succeeded, we know we'll be keeping all the
5420 relocs. */
5421 if (h->dynindx != -1)
5422 goto keep;
5423 }
5424
5425 eh->dyn_relocs = NULL;
5426
5427 keep: ;
5428 }
5429
5430 /* Finally, allocate space. */
5431 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5432 {
5433 asection *sreloc = elf_section_data (p->sec)->sreloc;
5434 if (!htab->elf.dynamic_sections_created)
5435 sreloc = htab->reliplt;
5436 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5437 }
5438
5439 return TRUE;
5440 }
5441
5442 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5443 read-only sections. */
5444
5445 static bfd_boolean
5446 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5447 {
5448 if (h->root.type == bfd_link_hash_indirect)
5449 return TRUE;
5450
5451 if (h->root.type == bfd_link_hash_warning)
5452 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5453
5454 if (readonly_dynrelocs (h))
5455 {
5456 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5457
5458 /* Not an error, just cut short the traversal. */
5459 return FALSE;
5460 }
5461 return TRUE;
5462 }
5463
5464 /* Set the sizes of the dynamic sections. */
5465
5466 static bfd_boolean
5467 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5468 struct bfd_link_info *info)
5469 {
5470 struct ppc_elf_link_hash_table *htab;
5471 asection *s;
5472 bfd_boolean relocs;
5473 bfd *ibfd;
5474
5475 #ifdef DEBUG
5476 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5477 #endif
5478
5479 htab = ppc_elf_hash_table (info);
5480 BFD_ASSERT (htab->elf.dynobj != NULL);
5481
5482 if (elf_hash_table (info)->dynamic_sections_created)
5483 {
5484 /* Set the contents of the .interp section to the interpreter. */
5485 if (info->executable)
5486 {
5487 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5488 BFD_ASSERT (s != NULL);
5489 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5490 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5491 }
5492 }
5493
5494 if (htab->plt_type == PLT_OLD)
5495 htab->got_header_size = 16;
5496 else if (htab->plt_type == PLT_NEW)
5497 htab->got_header_size = 12;
5498
5499 /* Set up .got offsets for local syms, and space for local dynamic
5500 relocs. */
5501 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5502 {
5503 bfd_signed_vma *local_got;
5504 bfd_signed_vma *end_local_got;
5505 struct plt_entry **local_plt;
5506 struct plt_entry **end_local_plt;
5507 char *lgot_masks;
5508 bfd_size_type locsymcount;
5509 Elf_Internal_Shdr *symtab_hdr;
5510
5511 if (!is_ppc_elf (ibfd))
5512 continue;
5513
5514 for (s = ibfd->sections; s != NULL; s = s->next)
5515 {
5516 struct ppc_elf_dyn_relocs *p;
5517
5518 for (p = ((struct ppc_elf_dyn_relocs *)
5519 elf_section_data (s)->local_dynrel);
5520 p != NULL;
5521 p = p->next)
5522 {
5523 if (!bfd_is_abs_section (p->sec)
5524 && bfd_is_abs_section (p->sec->output_section))
5525 {
5526 /* Input section has been discarded, either because
5527 it is a copy of a linkonce section or due to
5528 linker script /DISCARD/, so we'll be discarding
5529 the relocs too. */
5530 }
5531 else if (htab->is_vxworks
5532 && strcmp (p->sec->output_section->name,
5533 ".tls_vars") == 0)
5534 {
5535 /* Relocations in vxworks .tls_vars sections are
5536 handled specially by the loader. */
5537 }
5538 else if (p->count != 0)
5539 {
5540 asection *sreloc = elf_section_data (p->sec)->sreloc;
5541 if (!htab->elf.dynamic_sections_created)
5542 sreloc = htab->reliplt;
5543 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5544 if ((p->sec->output_section->flags
5545 & (SEC_READONLY | SEC_ALLOC))
5546 == (SEC_READONLY | SEC_ALLOC))
5547 info->flags |= DF_TEXTREL;
5548 }
5549 }
5550 }
5551
5552 local_got = elf_local_got_refcounts (ibfd);
5553 if (!local_got)
5554 continue;
5555
5556 symtab_hdr = &elf_symtab_hdr (ibfd);
5557 locsymcount = symtab_hdr->sh_info;
5558 end_local_got = local_got + locsymcount;
5559 local_plt = (struct plt_entry **) end_local_got;
5560 end_local_plt = local_plt + locsymcount;
5561 lgot_masks = (char *) end_local_plt;
5562 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5563 if (*local_got > 0)
5564 {
5565 unsigned int need = 0;
5566 if ((*lgot_masks & TLS_TLS) != 0)
5567 {
5568 if ((*lgot_masks & TLS_GD) != 0)
5569 need += 8;
5570 if ((*lgot_masks & TLS_LD) != 0)
5571 htab->tlsld_got.refcount += 1;
5572 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5573 need += 4;
5574 if ((*lgot_masks & TLS_DTPREL) != 0)
5575 need += 4;
5576 }
5577 else
5578 need += 4;
5579 if (need == 0)
5580 *local_got = (bfd_vma) -1;
5581 else
5582 {
5583 *local_got = allocate_got (htab, need);
5584 if (info->shared)
5585 htab->relgot->size += (need
5586 * (sizeof (Elf32_External_Rela) / 4));
5587 }
5588 }
5589 else
5590 *local_got = (bfd_vma) -1;
5591
5592 if (htab->is_vxworks)
5593 continue;
5594
5595 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5596 for (; local_plt < end_local_plt; ++local_plt)
5597 {
5598 struct plt_entry *ent;
5599 bfd_boolean doneone = FALSE;
5600 bfd_vma plt_offset = 0, glink_offset = 0;
5601
5602 for (ent = *local_plt; ent != NULL; ent = ent->next)
5603 if (ent->plt.refcount > 0)
5604 {
5605 asection *s = htab->iplt;
5606
5607 if (!doneone)
5608 {
5609 plt_offset = s->size;
5610 s->size += 4;
5611 }
5612 ent->plt.offset = plt_offset;
5613
5614 s = htab->glink;
5615 if (!doneone || info->shared)
5616 {
5617 glink_offset = s->size;
5618 s->size += GLINK_ENTRY_SIZE;
5619 }
5620 ent->glink_offset = glink_offset;
5621
5622 if (!doneone)
5623 {
5624 htab->reliplt->size += sizeof (Elf32_External_Rela);
5625 doneone = TRUE;
5626 }
5627 }
5628 else
5629 ent->plt.offset = (bfd_vma) -1;
5630 }
5631 }
5632
5633 /* Allocate space for global sym dynamic relocs. */
5634 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5635
5636 if (htab->tlsld_got.refcount > 0)
5637 {
5638 htab->tlsld_got.offset = allocate_got (htab, 8);
5639 if (info->shared)
5640 htab->relgot->size += sizeof (Elf32_External_Rela);
5641 }
5642 else
5643 htab->tlsld_got.offset = (bfd_vma) -1;
5644
5645 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5646 {
5647 unsigned int g_o_t = 32768;
5648
5649 /* If we haven't allocated the header, do so now. When we get here,
5650 for old plt/got the got size will be 0 to 32764 (not allocated),
5651 or 32780 to 65536 (header allocated). For new plt/got, the
5652 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5653 if (htab->got->size <= 32768)
5654 {
5655 g_o_t = htab->got->size;
5656 if (htab->plt_type == PLT_OLD)
5657 g_o_t += 4;
5658 htab->got->size += htab->got_header_size;
5659 }
5660
5661 htab->elf.hgot->root.u.def.value = g_o_t;
5662 }
5663
5664 if (htab->glink != NULL
5665 && htab->glink->size != 0
5666 && htab->elf.dynamic_sections_created)
5667 {
5668 htab->glink_pltresolve = htab->glink->size;
5669 /* Space for the branch table. */
5670 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5671 /* Pad out to align the start of PLTresolve. */
5672 htab->glink->size += -htab->glink->size & 15;
5673 htab->glink->size += GLINK_PLTRESOLVE;
5674
5675 if (htab->emit_stub_syms)
5676 {
5677 struct elf_link_hash_entry *sh;
5678 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5679 TRUE, FALSE, FALSE);
5680 if (sh == NULL)
5681 return FALSE;
5682 if (sh->root.type == bfd_link_hash_new)
5683 {
5684 sh->root.type = bfd_link_hash_defined;
5685 sh->root.u.def.section = htab->glink;
5686 sh->root.u.def.value = htab->glink_pltresolve;
5687 sh->ref_regular = 1;
5688 sh->def_regular = 1;
5689 sh->ref_regular_nonweak = 1;
5690 sh->forced_local = 1;
5691 sh->non_elf = 0;
5692 }
5693 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5694 TRUE, FALSE, FALSE);
5695 if (sh == NULL)
5696 return FALSE;
5697 if (sh->root.type == bfd_link_hash_new)
5698 {
5699 sh->root.type = bfd_link_hash_defined;
5700 sh->root.u.def.section = htab->glink;
5701 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5702 sh->ref_regular = 1;
5703 sh->def_regular = 1;
5704 sh->ref_regular_nonweak = 1;
5705 sh->forced_local = 1;
5706 sh->non_elf = 0;
5707 }
5708 }
5709 }
5710
5711 /* We've now determined the sizes of the various dynamic sections.
5712 Allocate memory for them. */
5713 relocs = FALSE;
5714 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5715 {
5716 bfd_boolean strip_section = TRUE;
5717
5718 if ((s->flags & SEC_LINKER_CREATED) == 0)
5719 continue;
5720
5721 if (s == htab->plt
5722 || s == htab->got)
5723 {
5724 /* We'd like to strip these sections if they aren't needed, but if
5725 we've exported dynamic symbols from them we must leave them.
5726 It's too late to tell BFD to get rid of the symbols. */
5727 if (htab->elf.hplt != NULL)
5728 strip_section = FALSE;
5729 /* Strip this section if we don't need it; see the
5730 comment below. */
5731 }
5732 else if (s == htab->iplt
5733 || s == htab->glink
5734 || s == htab->sgotplt
5735 || s == htab->sbss
5736 || s == htab->dynbss
5737 || s == htab->dynsbss
5738 || s == htab->sdata[0].section
5739 || s == htab->sdata[1].section)
5740 {
5741 /* Strip these too. */
5742 }
5743 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5744 {
5745 if (s->size != 0)
5746 {
5747 /* Remember whether there are any relocation sections. */
5748 relocs = TRUE;
5749
5750 /* We use the reloc_count field as a counter if we need
5751 to copy relocs into the output file. */
5752 s->reloc_count = 0;
5753 }
5754 }
5755 else
5756 {
5757 /* It's not one of our sections, so don't allocate space. */
5758 continue;
5759 }
5760
5761 if (s->size == 0 && strip_section)
5762 {
5763 /* If we don't need this section, strip it from the
5764 output file. This is mostly to handle .rela.bss and
5765 .rela.plt. We must create both sections in
5766 create_dynamic_sections, because they must be created
5767 before the linker maps input sections to output
5768 sections. The linker does that before
5769 adjust_dynamic_symbol is called, and it is that
5770 function which decides whether anything needs to go
5771 into these sections. */
5772 s->flags |= SEC_EXCLUDE;
5773 continue;
5774 }
5775
5776 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5777 continue;
5778
5779 /* Allocate memory for the section contents. */
5780 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5781 if (s->contents == NULL)
5782 return FALSE;
5783 }
5784
5785 if (htab->elf.dynamic_sections_created)
5786 {
5787 /* Add some entries to the .dynamic section. We fill in the
5788 values later, in ppc_elf_finish_dynamic_sections, but we
5789 must add the entries now so that we get the correct size for
5790 the .dynamic section. The DT_DEBUG entry is filled in by the
5791 dynamic linker and used by the debugger. */
5792 #define add_dynamic_entry(TAG, VAL) \
5793 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5794
5795 if (info->executable)
5796 {
5797 if (!add_dynamic_entry (DT_DEBUG, 0))
5798 return FALSE;
5799 }
5800
5801 if (htab->plt != NULL && htab->plt->size != 0)
5802 {
5803 if (!add_dynamic_entry (DT_PLTGOT, 0)
5804 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5805 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5806 || !add_dynamic_entry (DT_JMPREL, 0))
5807 return FALSE;
5808 }
5809
5810 if (htab->glink != NULL && htab->glink->size != 0)
5811 {
5812 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5813 return FALSE;
5814 }
5815
5816 if (relocs)
5817 {
5818 if (!add_dynamic_entry (DT_RELA, 0)
5819 || !add_dynamic_entry (DT_RELASZ, 0)
5820 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5821 return FALSE;
5822 }
5823
5824 /* If any dynamic relocs apply to a read-only section, then we
5825 need a DT_TEXTREL entry. */
5826 if ((info->flags & DF_TEXTREL) == 0)
5827 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5828 info);
5829
5830 if ((info->flags & DF_TEXTREL) != 0)
5831 {
5832 if (!add_dynamic_entry (DT_TEXTREL, 0))
5833 return FALSE;
5834 }
5835 if (htab->is_vxworks
5836 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5837 return FALSE;
5838 }
5839 #undef add_dynamic_entry
5840
5841 return TRUE;
5842 }
5843
5844 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5845
5846 static bfd_boolean
5847 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5848 {
5849 if (h->plt.plist != NULL
5850 && !h->def_regular
5851 && (!h->pointer_equality_needed
5852 || !h->ref_regular_nonweak))
5853 return FALSE;
5854
5855 return _bfd_elf_hash_symbol (h);
5856 }
5857 \f
5858 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5859
5860 static const int shared_stub_entry[] =
5861 {
5862 0x7c0802a6, /* mflr 0 */
5863 0x429f0005, /* bcl 20, 31, .Lxxx */
5864 0x7d6802a6, /* mflr 11 */
5865 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5866 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5867 0x7c0803a6, /* mtlr 0 */
5868 0x7d6903a6, /* mtctr 11 */
5869 0x4e800420, /* bctr */
5870 };
5871
5872 static const int stub_entry[] =
5873 {
5874 0x3d600000, /* lis 11,xxx@ha */
5875 0x396b0000, /* addi 11,11,xxx@l */
5876 0x7d6903a6, /* mtctr 11 */
5877 0x4e800420, /* bctr */
5878 };
5879
5880 static bfd_boolean
5881 ppc_elf_relax_section (bfd *abfd,
5882 asection *isec,
5883 struct bfd_link_info *link_info,
5884 bfd_boolean *again)
5885 {
5886 struct one_fixup
5887 {
5888 struct one_fixup *next;
5889 asection *tsec;
5890 bfd_vma toff;
5891 bfd_vma trampoff;
5892 };
5893
5894 Elf_Internal_Shdr *symtab_hdr;
5895 bfd_byte *contents = NULL;
5896 Elf_Internal_Sym *isymbuf = NULL;
5897 Elf_Internal_Rela *internal_relocs = NULL;
5898 Elf_Internal_Rela *irel, *irelend;
5899 struct one_fixup *fixups = NULL;
5900 unsigned changes = 0;
5901 struct ppc_elf_link_hash_table *htab;
5902 bfd_size_type trampoff;
5903 asection *got2;
5904
5905 *again = FALSE;
5906
5907 /* Nothing to do if there are no relocations, and no need to do
5908 anything with non-alloc sections. */
5909 if ((isec->flags & SEC_ALLOC) == 0
5910 || (isec->flags & SEC_RELOC) == 0
5911 || isec->reloc_count == 0)
5912 return TRUE;
5913
5914 /* We cannot represent the required PIC relocs in the output, so don't
5915 do anything. The linker doesn't support mixing -shared and -r
5916 anyway. */
5917 if (link_info->relocatable && link_info->shared)
5918 return TRUE;
5919
5920 trampoff = (isec->size + 3) & (bfd_vma) -4;
5921 /* Space for a branch around any trampolines. */
5922 trampoff += 4;
5923
5924 symtab_hdr = &elf_symtab_hdr (abfd);
5925
5926 /* Get a copy of the native relocations. */
5927 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5928 link_info->keep_memory);
5929 if (internal_relocs == NULL)
5930 goto error_return;
5931
5932 htab = ppc_elf_hash_table (link_info);
5933 got2 = bfd_get_section_by_name (abfd, ".got2");
5934
5935 irelend = internal_relocs + isec->reloc_count;
5936 for (irel = internal_relocs; irel < irelend; irel++)
5937 {
5938 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5939 bfd_vma symaddr, reladdr, toff, roff;
5940 asection *tsec;
5941 struct one_fixup *f;
5942 size_t insn_offset = 0;
5943 bfd_vma max_branch_offset, val;
5944 bfd_byte *hit_addr;
5945 unsigned long t0;
5946 struct elf_link_hash_entry *h;
5947 struct plt_entry **plist;
5948 unsigned char sym_type;
5949
5950 switch (r_type)
5951 {
5952 case R_PPC_REL24:
5953 case R_PPC_LOCAL24PC:
5954 case R_PPC_PLTREL24:
5955 max_branch_offset = 1 << 25;
5956 break;
5957
5958 case R_PPC_REL14:
5959 case R_PPC_REL14_BRTAKEN:
5960 case R_PPC_REL14_BRNTAKEN:
5961 max_branch_offset = 1 << 15;
5962 break;
5963
5964 default:
5965 continue;
5966 }
5967
5968 /* Get the value of the symbol referred to by the reloc. */
5969 h = NULL;
5970 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5971 {
5972 /* A local symbol. */
5973 Elf_Internal_Sym *isym;
5974
5975 /* Read this BFD's local symbols. */
5976 if (isymbuf == NULL)
5977 {
5978 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5979 if (isymbuf == NULL)
5980 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5981 symtab_hdr->sh_info, 0,
5982 NULL, NULL, NULL);
5983 if (isymbuf == 0)
5984 goto error_return;
5985 }
5986 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5987 if (isym->st_shndx == SHN_UNDEF)
5988 tsec = bfd_und_section_ptr;
5989 else if (isym->st_shndx == SHN_ABS)
5990 tsec = bfd_abs_section_ptr;
5991 else if (isym->st_shndx == SHN_COMMON)
5992 tsec = bfd_com_section_ptr;
5993 else
5994 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5995
5996 toff = isym->st_value;
5997 sym_type = ELF_ST_TYPE (isym->st_info);
5998 }
5999 else
6000 {
6001 /* Global symbol handling. */
6002 unsigned long indx;
6003
6004 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6005 h = elf_sym_hashes (abfd)[indx];
6006
6007 while (h->root.type == bfd_link_hash_indirect
6008 || h->root.type == bfd_link_hash_warning)
6009 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6010
6011 if (h->root.type == bfd_link_hash_defined
6012 || h->root.type == bfd_link_hash_defweak)
6013 {
6014 tsec = h->root.u.def.section;
6015 toff = h->root.u.def.value;
6016 }
6017 else if (h->root.type == bfd_link_hash_undefined
6018 || h->root.type == bfd_link_hash_undefweak)
6019 {
6020 tsec = bfd_und_section_ptr;
6021 toff = 0;
6022 }
6023 else
6024 continue;
6025
6026 sym_type = h->type;
6027 }
6028
6029 /* The condition here under which we call find_plt_ent must
6030 match that in relocate_section. If we call find_plt_ent here
6031 but not in relocate_section, or vice versa, then the branch
6032 destination used here may be incorrect. */
6033 plist = NULL;
6034 if (h != NULL)
6035 {
6036 /* We know is_branch_reloc (r_type) is true. */
6037 if (h->type == STT_GNU_IFUNC
6038 || r_type == R_PPC_PLTREL24)
6039 plist = &h->plt.plist;
6040 }
6041 else if (sym_type == STT_GNU_IFUNC
6042 && elf_local_got_offsets (abfd) != NULL)
6043 {
6044 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6045 struct plt_entry **local_plt = (struct plt_entry **)
6046 (local_got_offsets + symtab_hdr->sh_info);
6047 plist = local_plt + ELF32_R_SYM (irel->r_info);
6048 }
6049 if (plist != NULL)
6050 {
6051 bfd_vma addend = 0;
6052 struct plt_entry *ent;
6053
6054 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6055 addend = irel->r_addend;
6056 ent = find_plt_ent (plist, got2, addend);
6057 if (ent != NULL)
6058 {
6059 if (htab->plt_type == PLT_NEW
6060 || h == NULL
6061 || !htab->elf.dynamic_sections_created
6062 || h->dynindx == -1)
6063 {
6064 tsec = htab->glink;
6065 toff = ent->glink_offset;
6066 }
6067 else
6068 {
6069 tsec = htab->plt;
6070 toff = ent->plt.offset;
6071 }
6072 }
6073 }
6074
6075 /* If the branch and target are in the same section, you have
6076 no hope of adding stubs. We'll error out later should the
6077 branch overflow. */
6078 if (tsec == isec)
6079 continue;
6080
6081 /* There probably isn't any reason to handle symbols in
6082 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6083 attribute for a code section, and we are only looking at
6084 branches. However, implement it correctly here as a
6085 reference for other target relax_section functions. */
6086 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6087 {
6088 /* At this stage in linking, no SEC_MERGE symbol has been
6089 adjusted, so all references to such symbols need to be
6090 passed through _bfd_merged_section_offset. (Later, in
6091 relocate_section, all SEC_MERGE symbols *except* for
6092 section symbols have been adjusted.)
6093
6094 gas may reduce relocations against symbols in SEC_MERGE
6095 sections to a relocation against the section symbol when
6096 the original addend was zero. When the reloc is against
6097 a section symbol we should include the addend in the
6098 offset passed to _bfd_merged_section_offset, since the
6099 location of interest is the original symbol. On the
6100 other hand, an access to "sym+addend" where "sym" is not
6101 a section symbol should not include the addend; Such an
6102 access is presumed to be an offset from "sym"; The
6103 location of interest is just "sym". */
6104 if (sym_type == STT_SECTION)
6105 toff += irel->r_addend;
6106
6107 toff = _bfd_merged_section_offset (abfd, &tsec,
6108 elf_section_data (tsec)->sec_info,
6109 toff);
6110
6111 if (sym_type != STT_SECTION)
6112 toff += irel->r_addend;
6113 }
6114 /* PLTREL24 addends are special. */
6115 else if (r_type != R_PPC_PLTREL24)
6116 toff += irel->r_addend;
6117
6118 /* Attempted -shared link of non-pic code loses. */
6119 if (tsec->output_section == NULL)
6120 continue;
6121
6122 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6123
6124 roff = irel->r_offset;
6125 reladdr = isec->output_section->vma + isec->output_offset + roff;
6126
6127 /* If the branch is in range, no need to do anything. */
6128 if (tsec != bfd_und_section_ptr
6129 && (!link_info->relocatable
6130 /* A relocatable link may have sections moved during
6131 final link, so do not presume they remain in range. */
6132 || tsec->output_section == isec->output_section)
6133 && symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6134 continue;
6135
6136 /* Look for an existing fixup to this address. */
6137 for (f = fixups; f ; f = f->next)
6138 if (f->tsec == tsec && f->toff == toff)
6139 break;
6140
6141 if (f == NULL)
6142 {
6143 size_t size;
6144 unsigned long stub_rtype;
6145
6146 val = trampoff - roff;
6147 if (val >= max_branch_offset)
6148 /* Oh dear, we can't reach a trampoline. Don't try to add
6149 one. We'll report an error later. */
6150 continue;
6151
6152 if (link_info->shared)
6153 {
6154 size = 4 * ARRAY_SIZE (shared_stub_entry);
6155 insn_offset = 12;
6156 stub_rtype = R_PPC_RELAX32PC;
6157 }
6158 else
6159 {
6160 size = 4 * ARRAY_SIZE (stub_entry);
6161 insn_offset = 0;
6162 stub_rtype = R_PPC_RELAX32;
6163 }
6164
6165 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
6166 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
6167 abort ();
6168 if (tsec == htab->plt
6169 || tsec == htab->glink)
6170 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
6171
6172 /* Hijack the old relocation. Since we need two
6173 relocations for this use a "composite" reloc. */
6174 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6175 stub_rtype);
6176 irel->r_offset = trampoff + insn_offset;
6177 if (r_type == R_PPC_PLTREL24)
6178 irel->r_addend = 0;
6179
6180 /* Record the fixup so we don't do it again this section. */
6181 f = bfd_malloc (sizeof (*f));
6182 f->next = fixups;
6183 f->tsec = tsec;
6184 f->toff = toff;
6185 f->trampoff = trampoff;
6186 fixups = f;
6187
6188 trampoff += size;
6189 changes++;
6190 }
6191 else
6192 {
6193 val = f->trampoff - roff;
6194 if (val >= max_branch_offset)
6195 continue;
6196
6197 /* Nop out the reloc, since we're finalizing things here. */
6198 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6199 }
6200
6201 /* Get the section contents. */
6202 if (contents == NULL)
6203 {
6204 /* Get cached copy if it exists. */
6205 if (elf_section_data (isec)->this_hdr.contents != NULL)
6206 contents = elf_section_data (isec)->this_hdr.contents;
6207 else
6208 {
6209 /* Go get them off disk. */
6210 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6211 goto error_return;
6212 }
6213 }
6214
6215 /* Fix up the existing branch to hit the trampoline. */
6216 hit_addr = contents + roff;
6217 switch (r_type)
6218 {
6219 case R_PPC_REL24:
6220 case R_PPC_LOCAL24PC:
6221 case R_PPC_PLTREL24:
6222 t0 = bfd_get_32 (abfd, hit_addr);
6223 t0 &= ~0x3fffffc;
6224 t0 |= val & 0x3fffffc;
6225 bfd_put_32 (abfd, t0, hit_addr);
6226 break;
6227
6228 case R_PPC_REL14:
6229 case R_PPC_REL14_BRTAKEN:
6230 case R_PPC_REL14_BRNTAKEN:
6231 t0 = bfd_get_32 (abfd, hit_addr);
6232 t0 &= ~0xfffc;
6233 t0 |= val & 0xfffc;
6234 bfd_put_32 (abfd, t0, hit_addr);
6235 break;
6236 }
6237 }
6238
6239 /* Write out the trampolines. */
6240 if (fixups != NULL)
6241 {
6242 const int *stub;
6243 bfd_byte *dest;
6244 bfd_vma val;
6245 int i, size;
6246
6247 do
6248 {
6249 struct one_fixup *f = fixups;
6250 fixups = fixups->next;
6251 free (f);
6252 }
6253 while (fixups);
6254
6255 contents = bfd_realloc_or_free (contents, trampoff);
6256 if (contents == NULL)
6257 goto error_return;
6258
6259 isec->size = (isec->size + 3) & (bfd_vma) -4;
6260 /* Branch around the trampolines. */
6261 val = B + trampoff - isec->size;
6262 dest = contents + isec->size;
6263 isec->size = trampoff;
6264 bfd_put_32 (abfd, val, dest);
6265 dest += 4;
6266
6267 if (link_info->shared)
6268 {
6269 stub = shared_stub_entry;
6270 size = ARRAY_SIZE (shared_stub_entry);
6271 }
6272 else
6273 {
6274 stub = stub_entry;
6275 size = ARRAY_SIZE (stub_entry);
6276 }
6277
6278 i = 0;
6279 while (dest < contents + trampoff)
6280 {
6281 bfd_put_32 (abfd, stub[i], dest);
6282 i++;
6283 if (i == size)
6284 i = 0;
6285 dest += 4;
6286 }
6287 BFD_ASSERT (i == 0);
6288 }
6289
6290 if (isymbuf != NULL
6291 && symtab_hdr->contents != (unsigned char *) isymbuf)
6292 {
6293 if (! link_info->keep_memory)
6294 free (isymbuf);
6295 else
6296 {
6297 /* Cache the symbols for elf_link_input_bfd. */
6298 symtab_hdr->contents = (unsigned char *) isymbuf;
6299 }
6300 }
6301
6302 if (contents != NULL
6303 && elf_section_data (isec)->this_hdr.contents != contents)
6304 {
6305 if (!changes && !link_info->keep_memory)
6306 free (contents);
6307 else
6308 {
6309 /* Cache the section contents for elf_link_input_bfd. */
6310 elf_section_data (isec)->this_hdr.contents = contents;
6311 }
6312 }
6313
6314 if (changes != 0)
6315 {
6316 /* Append sufficient NOP relocs so we can write out relocation
6317 information for the trampolines. */
6318 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6319 * sizeof (*new_relocs));
6320 unsigned ix;
6321
6322 if (!new_relocs)
6323 goto error_return;
6324 memcpy (new_relocs, internal_relocs,
6325 isec->reloc_count * sizeof (*new_relocs));
6326 for (ix = changes; ix--;)
6327 {
6328 irel = new_relocs + ix + isec->reloc_count;
6329
6330 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6331 }
6332 if (internal_relocs != elf_section_data (isec)->relocs)
6333 free (internal_relocs);
6334 elf_section_data (isec)->relocs = new_relocs;
6335 isec->reloc_count += changes;
6336 elf_section_data (isec)->rel_hdr.sh_size
6337 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6338 }
6339 else if (elf_section_data (isec)->relocs != internal_relocs)
6340 free (internal_relocs);
6341
6342 *again = changes != 0;
6343 if (!*again && link_info->relocatable)
6344 {
6345 /* Convert the internal relax relocs to external form. */
6346 for (irel = internal_relocs; irel < irelend; irel++)
6347 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6348 {
6349 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6350
6351 /* Rewrite the reloc and convert one of the trailing nop
6352 relocs to describe this relocation. */
6353 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6354 /* The relocs are at the bottom 2 bytes */
6355 irel[0].r_offset += 2;
6356 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6357 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6358 irel[1].r_offset += 4;
6359 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6360 irel++;
6361 }
6362 }
6363
6364 return TRUE;
6365
6366 error_return:
6367 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6368 free (isymbuf);
6369 if (contents != NULL
6370 && elf_section_data (isec)->this_hdr.contents != contents)
6371 free (contents);
6372 if (internal_relocs != NULL
6373 && elf_section_data (isec)->relocs != internal_relocs)
6374 free (internal_relocs);
6375 return FALSE;
6376 }
6377 \f
6378 /* What to do when ld finds relocations against symbols defined in
6379 discarded sections. */
6380
6381 static unsigned int
6382 ppc_elf_action_discarded (asection *sec)
6383 {
6384 if (strcmp (".fixup", sec->name) == 0)
6385 return 0;
6386
6387 if (strcmp (".got2", sec->name) == 0)
6388 return 0;
6389
6390 return _bfd_elf_default_action_discarded (sec);
6391 }
6392 \f
6393 /* Fill in the address for a pointer generated in a linker section. */
6394
6395 static bfd_vma
6396 elf_finish_pointer_linker_section (bfd *input_bfd,
6397 elf_linker_section_t *lsect,
6398 struct elf_link_hash_entry *h,
6399 bfd_vma relocation,
6400 const Elf_Internal_Rela *rel)
6401 {
6402 elf_linker_section_pointers_t *linker_section_ptr;
6403
6404 BFD_ASSERT (lsect != NULL);
6405
6406 if (h != NULL)
6407 {
6408 /* Handle global symbol. */
6409 struct ppc_elf_link_hash_entry *eh;
6410
6411 eh = (struct ppc_elf_link_hash_entry *) h;
6412 BFD_ASSERT (eh->elf.def_regular);
6413 linker_section_ptr = eh->linker_section_pointer;
6414 }
6415 else
6416 {
6417 /* Handle local symbol. */
6418 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6419
6420 BFD_ASSERT (is_ppc_elf (input_bfd));
6421 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6422 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6423 }
6424
6425 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6426 rel->r_addend,
6427 lsect);
6428 BFD_ASSERT (linker_section_ptr != NULL);
6429
6430 /* Offset will always be a multiple of four, so use the bottom bit
6431 as a "written" flag. */
6432 if ((linker_section_ptr->offset & 1) == 0)
6433 {
6434 bfd_put_32 (lsect->section->owner,
6435 relocation + linker_section_ptr->addend,
6436 lsect->section->contents + linker_section_ptr->offset);
6437 linker_section_ptr->offset += 1;
6438 }
6439
6440 relocation = (lsect->section->output_offset
6441 + linker_section_ptr->offset - 1
6442 - 0x8000);
6443
6444 #ifdef DEBUG
6445 fprintf (stderr,
6446 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6447 lsect->name, (long) relocation, (long) relocation);
6448 #endif
6449
6450 /* Subtract out the addend, because it will get added back in by the normal
6451 processing. */
6452 return relocation - linker_section_ptr->addend;
6453 }
6454
6455 #define PPC_LO(v) ((v) & 0xffff)
6456 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6457 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6458
6459 static void
6460 write_glink_stub (struct plt_entry *ent, asection *plt_sec,
6461 struct bfd_link_info *info)
6462 {
6463 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6464 bfd *output_bfd = info->output_bfd;
6465 bfd_vma plt;
6466 unsigned char *p;
6467
6468 plt = ((ent->plt.offset & ~1)
6469 + plt_sec->output_section->vma
6470 + plt_sec->output_offset);
6471 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6472
6473 if (info->shared)
6474 {
6475 bfd_vma got = 0;
6476
6477 if (ent->addend >= 32768)
6478 got = (ent->addend
6479 + ent->sec->output_section->vma
6480 + ent->sec->output_offset);
6481 else if (htab->elf.hgot != NULL)
6482 got = SYM_VAL (htab->elf.hgot);
6483
6484 plt -= got;
6485
6486 if (plt + 0x8000 < 0x10000)
6487 {
6488 bfd_put_32 (output_bfd, LWZ_11_30 + 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 bfd_put_32 (output_bfd, NOP, p);
6495 p += 4;
6496 }
6497 else
6498 {
6499 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6500 p += 4;
6501 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6502 p += 4;
6503 bfd_put_32 (output_bfd, MTCTR_11, p);
6504 p += 4;
6505 bfd_put_32 (output_bfd, BCTR, p);
6506 p += 4;
6507 }
6508 }
6509 else
6510 {
6511 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6512 p += 4;
6513 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6514 p += 4;
6515 bfd_put_32 (output_bfd, MTCTR_11, p);
6516 p += 4;
6517 bfd_put_32 (output_bfd, BCTR, p);
6518 p += 4;
6519 }
6520 }
6521
6522 /* The RELOCATE_SECTION function is called by the ELF backend linker
6523 to handle the relocations for a section.
6524
6525 The relocs are always passed as Rela structures; if the section
6526 actually uses Rel structures, the r_addend field will always be
6527 zero.
6528
6529 This function is responsible for adjust the section contents as
6530 necessary, and (if using Rela relocs and generating a
6531 relocatable output file) adjusting the reloc addend as
6532 necessary.
6533
6534 This function does not have to worry about setting the reloc
6535 address or the reloc symbol index.
6536
6537 LOCAL_SYMS is a pointer to the swapped in local symbols.
6538
6539 LOCAL_SECTIONS is an array giving the section in the input file
6540 corresponding to the st_shndx field of each local symbol.
6541
6542 The global hash table entry for the global symbols can be found
6543 via elf_sym_hashes (input_bfd).
6544
6545 When generating relocatable output, this function must handle
6546 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6547 going to be the section symbol corresponding to the output
6548 section, which means that the addend must be adjusted
6549 accordingly. */
6550
6551 static bfd_boolean
6552 ppc_elf_relocate_section (bfd *output_bfd,
6553 struct bfd_link_info *info,
6554 bfd *input_bfd,
6555 asection *input_section,
6556 bfd_byte *contents,
6557 Elf_Internal_Rela *relocs,
6558 Elf_Internal_Sym *local_syms,
6559 asection **local_sections)
6560 {
6561 Elf_Internal_Shdr *symtab_hdr;
6562 struct elf_link_hash_entry **sym_hashes;
6563 struct ppc_elf_link_hash_table *htab;
6564 Elf_Internal_Rela *rel;
6565 Elf_Internal_Rela *relend;
6566 Elf_Internal_Rela outrel;
6567 bfd_byte *loc;
6568 asection *got2, *sreloc = NULL;
6569 bfd_vma *local_got_offsets;
6570 bfd_boolean ret = TRUE;
6571 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6572 bfd_boolean is_vxworks_tls;
6573
6574 #ifdef DEBUG
6575 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6576 "%ld relocations%s",
6577 input_bfd, input_section,
6578 (long) input_section->reloc_count,
6579 (info->relocatable) ? " (relocatable)" : "");
6580 #endif
6581
6582 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6583
6584 /* Initialize howto table if not already done. */
6585 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6586 ppc_elf_howto_init ();
6587
6588 htab = ppc_elf_hash_table (info);
6589 local_got_offsets = elf_local_got_offsets (input_bfd);
6590 symtab_hdr = &elf_symtab_hdr (input_bfd);
6591 sym_hashes = elf_sym_hashes (input_bfd);
6592 /* We have to handle relocations in vxworks .tls_vars sections
6593 specially, because the dynamic loader is 'weird'. */
6594 is_vxworks_tls = (htab->is_vxworks && info->shared
6595 && !strcmp (input_section->output_section->name,
6596 ".tls_vars"));
6597 rel = relocs;
6598 relend = relocs + input_section->reloc_count;
6599 for (; rel < relend; rel++)
6600 {
6601 enum elf_ppc_reloc_type r_type;
6602 bfd_vma addend;
6603 bfd_reloc_status_type r;
6604 Elf_Internal_Sym *sym;
6605 asection *sec;
6606 struct elf_link_hash_entry *h;
6607 const char *sym_name;
6608 reloc_howto_type *howto;
6609 unsigned long r_symndx;
6610 bfd_vma relocation;
6611 bfd_vma branch_bit, insn, from;
6612 bfd_boolean unresolved_reloc;
6613 bfd_boolean warned;
6614 unsigned int tls_type, tls_mask, tls_gd;
6615 struct plt_entry **ifunc;
6616
6617 r_type = ELF32_R_TYPE (rel->r_info);
6618 sym = NULL;
6619 sec = NULL;
6620 h = NULL;
6621 unresolved_reloc = FALSE;
6622 warned = FALSE;
6623 r_symndx = ELF32_R_SYM (rel->r_info);
6624
6625 if (r_symndx < symtab_hdr->sh_info)
6626 {
6627 sym = local_syms + r_symndx;
6628 sec = local_sections[r_symndx];
6629 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6630
6631 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6632 }
6633 else
6634 {
6635 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6636 r_symndx, symtab_hdr, sym_hashes,
6637 h, sec, relocation,
6638 unresolved_reloc, warned);
6639
6640 sym_name = h->root.root.string;
6641 }
6642
6643 if (sec != NULL && elf_discarded_section (sec))
6644 {
6645 /* For relocs against symbols from removed linkonce sections,
6646 or sections discarded by a linker script, we just want the
6647 section contents zeroed. Avoid any special processing. */
6648 howto = NULL;
6649 if (r_type < R_PPC_max)
6650 howto = ppc_elf_howto_table[r_type];
6651 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6652 rel->r_info = 0;
6653 rel->r_addend = 0;
6654 continue;
6655 }
6656
6657 if (info->relocatable)
6658 {
6659 if (got2 != NULL
6660 && r_type == R_PPC_PLTREL24
6661 && rel->r_addend >= 32768)
6662 {
6663 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6664 addend specifies the GOT pointer offset within .got2. */
6665 rel->r_addend += got2->output_offset;
6666 }
6667 continue;
6668 }
6669
6670 /* TLS optimizations. Replace instruction sequences and relocs
6671 based on information we collected in tls_optimize. We edit
6672 RELOCS so that --emit-relocs will output something sensible
6673 for the final instruction stream. */
6674 tls_mask = 0;
6675 tls_gd = 0;
6676 if (h != NULL)
6677 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6678 else if (local_got_offsets != NULL)
6679 {
6680 struct plt_entry **local_plt;
6681 char *lgot_masks;
6682 local_plt
6683 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6684 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6685 tls_mask = lgot_masks[r_symndx];
6686 }
6687
6688 /* Ensure reloc mapping code below stays sane. */
6689 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6690 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6691 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6692 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6693 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6694 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6695 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6696 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6697 abort ();
6698 switch (r_type)
6699 {
6700 default:
6701 break;
6702
6703 case R_PPC_GOT_TPREL16:
6704 case R_PPC_GOT_TPREL16_LO:
6705 if ((tls_mask & TLS_TLS) != 0
6706 && (tls_mask & TLS_TPREL) == 0)
6707 {
6708 bfd_vma insn;
6709 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6710 insn &= 31 << 21;
6711 insn |= 0x3c020000; /* addis 0,2,0 */
6712 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6713 r_type = R_PPC_TPREL16_HA;
6714 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6715 }
6716 break;
6717
6718 case R_PPC_TLS:
6719 if ((tls_mask & TLS_TLS) != 0
6720 && (tls_mask & TLS_TPREL) == 0)
6721 {
6722 bfd_vma insn, rtra;
6723 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6724 if ((insn & ((31 << 26) | (31 << 11)))
6725 == ((31 << 26) | (2 << 11)))
6726 rtra = insn & ((1 << 26) - (1 << 16));
6727 else if ((insn & ((31 << 26) | (31 << 16)))
6728 == ((31 << 26) | (2 << 16)))
6729 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6730 else
6731 abort ();
6732 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6733 /* add -> addi. */
6734 insn = 14 << 26;
6735 else if ((insn & (31 << 1)) == 23 << 1
6736 && ((insn & (31 << 6)) < 14 << 6
6737 || ((insn & (31 << 6)) >= 16 << 6
6738 && (insn & (31 << 6)) < 24 << 6)))
6739 /* load and store indexed -> dform. */
6740 insn = (32 | ((insn >> 6) & 31)) << 26;
6741 else if ((insn & (31 << 1)) == 21 << 1
6742 && (insn & (0x1a << 6)) == 0)
6743 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6744 insn = (((58 | ((insn >> 6) & 4)) << 26)
6745 | ((insn >> 6) & 1));
6746 else if ((insn & (31 << 1)) == 21 << 1
6747 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6748 /* lwax -> lwa. */
6749 insn = (58 << 26) | 2;
6750 else
6751 abort ();
6752 insn |= rtra;
6753 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6754 r_type = R_PPC_TPREL16_LO;
6755 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6756
6757 /* Was PPC_TLS which sits on insn boundary, now
6758 PPC_TPREL16_LO which is at low-order half-word. */
6759 rel->r_offset += d_offset;
6760 }
6761 break;
6762
6763 case R_PPC_GOT_TLSGD16_HI:
6764 case R_PPC_GOT_TLSGD16_HA:
6765 tls_gd = TLS_TPRELGD;
6766 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6767 goto tls_gdld_hi;
6768 break;
6769
6770 case R_PPC_GOT_TLSLD16_HI:
6771 case R_PPC_GOT_TLSLD16_HA:
6772 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6773 {
6774 tls_gdld_hi:
6775 if ((tls_mask & tls_gd) != 0)
6776 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6777 + R_PPC_GOT_TPREL16);
6778 else
6779 {
6780 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6781 rel->r_offset -= d_offset;
6782 r_type = R_PPC_NONE;
6783 }
6784 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6785 }
6786 break;
6787
6788 case R_PPC_GOT_TLSGD16:
6789 case R_PPC_GOT_TLSGD16_LO:
6790 tls_gd = TLS_TPRELGD;
6791 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6792 goto tls_ldgd_opt;
6793 break;
6794
6795 case R_PPC_GOT_TLSLD16:
6796 case R_PPC_GOT_TLSLD16_LO:
6797 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6798 {
6799 unsigned int insn1, insn2;
6800 bfd_vma offset;
6801
6802 tls_ldgd_opt:
6803 offset = (bfd_vma) -1;
6804 /* If not using the newer R_PPC_TLSGD/LD to mark
6805 __tls_get_addr calls, we must trust that the call
6806 stays with its arg setup insns, ie. that the next
6807 reloc is the __tls_get_addr call associated with
6808 the current reloc. Edit both insns. */
6809 if (input_section->has_tls_get_addr_call
6810 && rel + 1 < relend
6811 && branch_reloc_hash_match (input_bfd, rel + 1,
6812 htab->tls_get_addr))
6813 offset = rel[1].r_offset;
6814 if ((tls_mask & tls_gd) != 0)
6815 {
6816 /* IE */
6817 insn1 = bfd_get_32 (output_bfd,
6818 contents + rel->r_offset - d_offset);
6819 insn1 &= (1 << 26) - 1;
6820 insn1 |= 32 << 26; /* lwz */
6821 if (offset != (bfd_vma) -1)
6822 {
6823 rel[1].r_info
6824 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6825 R_PPC_NONE);
6826 insn2 = 0x7c631214; /* add 3,3,2 */
6827 bfd_put_32 (output_bfd, insn2, contents + offset);
6828 }
6829 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6830 + R_PPC_GOT_TPREL16);
6831 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6832 }
6833 else
6834 {
6835 /* LE */
6836 insn1 = 0x3c620000; /* addis 3,2,0 */
6837 if (tls_gd == 0)
6838 {
6839 /* Was an LD reloc. */
6840 for (r_symndx = 0;
6841 r_symndx < symtab_hdr->sh_info;
6842 r_symndx++)
6843 if (local_sections[r_symndx] == sec)
6844 break;
6845 if (r_symndx >= symtab_hdr->sh_info)
6846 r_symndx = 0;
6847 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6848 if (r_symndx != 0)
6849 rel->r_addend -= (local_syms[r_symndx].st_value
6850 + sec->output_offset
6851 + sec->output_section->vma);
6852 }
6853 r_type = R_PPC_TPREL16_HA;
6854 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6855 if (offset != (bfd_vma) -1)
6856 {
6857 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6858 rel[1].r_offset = offset + d_offset;
6859 rel[1].r_addend = rel->r_addend;
6860 insn2 = 0x38630000; /* addi 3,3,0 */
6861 bfd_put_32 (output_bfd, insn2, contents + offset);
6862 }
6863 }
6864 bfd_put_32 (output_bfd, insn1,
6865 contents + rel->r_offset - d_offset);
6866 if (tls_gd == 0)
6867 {
6868 /* We changed the symbol on an LD reloc. Start over
6869 in order to get h, sym, sec etc. right. */
6870 rel--;
6871 continue;
6872 }
6873 }
6874 break;
6875
6876 case R_PPC_TLSGD:
6877 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6878 {
6879 unsigned int insn2;
6880 bfd_vma offset = rel->r_offset;
6881
6882 if ((tls_mask & TLS_TPRELGD) != 0)
6883 {
6884 /* IE */
6885 r_type = R_PPC_NONE;
6886 insn2 = 0x7c631214; /* add 3,3,2 */
6887 }
6888 else
6889 {
6890 /* LE */
6891 r_type = R_PPC_TPREL16_LO;
6892 rel->r_offset += d_offset;
6893 insn2 = 0x38630000; /* addi 3,3,0 */
6894 }
6895 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6896 bfd_put_32 (output_bfd, insn2, contents + offset);
6897 /* Zap the reloc on the _tls_get_addr call too. */
6898 BFD_ASSERT (offset == rel[1].r_offset);
6899 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6900 R_PPC_NONE);
6901 }
6902 break;
6903
6904 case R_PPC_TLSLD:
6905 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6906 {
6907 unsigned int insn2;
6908
6909 for (r_symndx = 0;
6910 r_symndx < symtab_hdr->sh_info;
6911 r_symndx++)
6912 if (local_sections[r_symndx] == sec)
6913 break;
6914 if (r_symndx >= symtab_hdr->sh_info)
6915 r_symndx = 0;
6916 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6917 if (r_symndx != 0)
6918 rel->r_addend -= (local_syms[r_symndx].st_value
6919 + sec->output_offset
6920 + sec->output_section->vma);
6921
6922 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6923 rel->r_offset += d_offset;
6924 insn2 = 0x38630000; /* addi 3,3,0 */
6925 bfd_put_32 (output_bfd, insn2,
6926 contents + rel->r_offset - d_offset);
6927 /* Zap the reloc on the _tls_get_addr call too. */
6928 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
6929 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6930 R_PPC_NONE);
6931 rel--;
6932 continue;
6933 }
6934 break;
6935 }
6936
6937 /* Handle other relocations that tweak non-addend part of insn. */
6938 branch_bit = 0;
6939 switch (r_type)
6940 {
6941 default:
6942 break;
6943
6944 /* Branch taken prediction relocations. */
6945 case R_PPC_ADDR14_BRTAKEN:
6946 case R_PPC_REL14_BRTAKEN:
6947 branch_bit = BRANCH_PREDICT_BIT;
6948 /* Fall thru */
6949
6950 /* Branch not taken prediction relocations. */
6951 case R_PPC_ADDR14_BRNTAKEN:
6952 case R_PPC_REL14_BRNTAKEN:
6953 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6954 insn &= ~BRANCH_PREDICT_BIT;
6955 insn |= branch_bit;
6956
6957 from = (rel->r_offset
6958 + input_section->output_offset
6959 + input_section->output_section->vma);
6960
6961 /* Invert 'y' bit if not the default. */
6962 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6963 insn ^= BRANCH_PREDICT_BIT;
6964
6965 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6966 break;
6967 }
6968
6969 ifunc = NULL;
6970 if (!htab->is_vxworks)
6971 {
6972 struct plt_entry *ent;
6973
6974 if (h != NULL)
6975 {
6976 if (h->type == STT_GNU_IFUNC)
6977 ifunc = &h->plt.plist;
6978 }
6979 else if (local_got_offsets != NULL
6980 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
6981 {
6982 struct plt_entry **local_plt;
6983
6984 local_plt = (struct plt_entry **) (local_got_offsets
6985 + symtab_hdr->sh_info);
6986 ifunc = local_plt + r_symndx;
6987 }
6988
6989 ent = NULL;
6990 if (ifunc != NULL
6991 && (!info->shared
6992 || is_branch_reloc (r_type)))
6993 {
6994 addend = 0;
6995 if (r_type == R_PPC_PLTREL24 && info->shared)
6996 addend = rel->r_addend;
6997 ent = find_plt_ent (ifunc, got2, addend);
6998 }
6999 if (ent != NULL)
7000 {
7001 if (h == NULL && (ent->plt.offset & 1) == 0)
7002 {
7003 Elf_Internal_Rela rela;
7004 bfd_byte *loc;
7005
7006 rela.r_offset = (htab->iplt->output_section->vma
7007 + htab->iplt->output_offset
7008 + ent->plt.offset);
7009 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7010 rela.r_addend = relocation;
7011 loc = htab->reliplt->contents;
7012 loc += (htab->reliplt->reloc_count++
7013 * sizeof (Elf32_External_Rela));
7014 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7015
7016 ent->plt.offset |= 1;
7017 }
7018 if (h == NULL && (ent->glink_offset & 1) == 0)
7019 {
7020 write_glink_stub (ent, htab->iplt, info);
7021 ent->glink_offset |= 1;
7022 }
7023
7024 unresolved_reloc = FALSE;
7025 if (htab->plt_type == PLT_NEW
7026 || !htab->elf.dynamic_sections_created
7027 || h == NULL)
7028 relocation = (htab->glink->output_section->vma
7029 + htab->glink->output_offset
7030 + (ent->glink_offset & ~1));
7031 else
7032 relocation = (htab->plt->output_section->vma
7033 + htab->plt->output_offset
7034 + ent->plt.offset);
7035 }
7036 }
7037
7038 addend = rel->r_addend;
7039 tls_type = 0;
7040 howto = NULL;
7041 if (r_type < R_PPC_max)
7042 howto = ppc_elf_howto_table[r_type];
7043 switch (r_type)
7044 {
7045 default:
7046 (*_bfd_error_handler)
7047 (_("%B: unknown relocation type %d for symbol %s"),
7048 input_bfd, (int) r_type, sym_name);
7049
7050 bfd_set_error (bfd_error_bad_value);
7051 ret = FALSE;
7052 continue;
7053
7054 case R_PPC_NONE:
7055 case R_PPC_TLS:
7056 case R_PPC_TLSGD:
7057 case R_PPC_TLSLD:
7058 case R_PPC_EMB_MRKREF:
7059 case R_PPC_GNU_VTINHERIT:
7060 case R_PPC_GNU_VTENTRY:
7061 continue;
7062
7063 /* GOT16 relocations. Like an ADDR16 using the symbol's
7064 address in the GOT as relocation value instead of the
7065 symbol's value itself. Also, create a GOT entry for the
7066 symbol and put the symbol value there. */
7067 case R_PPC_GOT_TLSGD16:
7068 case R_PPC_GOT_TLSGD16_LO:
7069 case R_PPC_GOT_TLSGD16_HI:
7070 case R_PPC_GOT_TLSGD16_HA:
7071 tls_type = TLS_TLS | TLS_GD;
7072 goto dogot;
7073
7074 case R_PPC_GOT_TLSLD16:
7075 case R_PPC_GOT_TLSLD16_LO:
7076 case R_PPC_GOT_TLSLD16_HI:
7077 case R_PPC_GOT_TLSLD16_HA:
7078 tls_type = TLS_TLS | TLS_LD;
7079 goto dogot;
7080
7081 case R_PPC_GOT_TPREL16:
7082 case R_PPC_GOT_TPREL16_LO:
7083 case R_PPC_GOT_TPREL16_HI:
7084 case R_PPC_GOT_TPREL16_HA:
7085 tls_type = TLS_TLS | TLS_TPREL;
7086 goto dogot;
7087
7088 case R_PPC_GOT_DTPREL16:
7089 case R_PPC_GOT_DTPREL16_LO:
7090 case R_PPC_GOT_DTPREL16_HI:
7091 case R_PPC_GOT_DTPREL16_HA:
7092 tls_type = TLS_TLS | TLS_DTPREL;
7093 goto dogot;
7094
7095 case R_PPC_GOT16:
7096 case R_PPC_GOT16_LO:
7097 case R_PPC_GOT16_HI:
7098 case R_PPC_GOT16_HA:
7099 tls_mask = 0;
7100 dogot:
7101 {
7102 /* Relocation is to the entry for this symbol in the global
7103 offset table. */
7104 bfd_vma off;
7105 bfd_vma *offp;
7106 unsigned long indx;
7107
7108 if (htab->got == NULL)
7109 abort ();
7110
7111 indx = 0;
7112 if (tls_type == (TLS_TLS | TLS_LD)
7113 && (h == NULL
7114 || !h->def_dynamic))
7115 offp = &htab->tlsld_got.offset;
7116 else if (h != NULL)
7117 {
7118 bfd_boolean dyn;
7119 dyn = htab->elf.dynamic_sections_created;
7120 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7121 || (info->shared
7122 && SYMBOL_REFERENCES_LOCAL (info, h)))
7123 /* This is actually a static link, or it is a
7124 -Bsymbolic link and the symbol is defined
7125 locally, or the symbol was forced to be local
7126 because of a version file. */
7127 ;
7128 else
7129 {
7130 indx = h->dynindx;
7131 unresolved_reloc = FALSE;
7132 }
7133 offp = &h->got.offset;
7134 }
7135 else
7136 {
7137 if (local_got_offsets == NULL)
7138 abort ();
7139 offp = &local_got_offsets[r_symndx];
7140 }
7141
7142 /* The offset must always be a multiple of 4. We use the
7143 least significant bit to record whether we have already
7144 processed this entry. */
7145 off = *offp;
7146 if ((off & 1) != 0)
7147 off &= ~1;
7148 else
7149 {
7150 unsigned int tls_m = (tls_mask
7151 & (TLS_LD | TLS_GD | TLS_DTPREL
7152 | TLS_TPREL | TLS_TPRELGD));
7153
7154 if (offp == &htab->tlsld_got.offset)
7155 tls_m = TLS_LD;
7156 else if (h == NULL
7157 || !h->def_dynamic)
7158 tls_m &= ~TLS_LD;
7159
7160 /* We might have multiple got entries for this sym.
7161 Initialize them all. */
7162 do
7163 {
7164 int tls_ty = 0;
7165
7166 if ((tls_m & TLS_LD) != 0)
7167 {
7168 tls_ty = TLS_TLS | TLS_LD;
7169 tls_m &= ~TLS_LD;
7170 }
7171 else if ((tls_m & TLS_GD) != 0)
7172 {
7173 tls_ty = TLS_TLS | TLS_GD;
7174 tls_m &= ~TLS_GD;
7175 }
7176 else if ((tls_m & TLS_DTPREL) != 0)
7177 {
7178 tls_ty = TLS_TLS | TLS_DTPREL;
7179 tls_m &= ~TLS_DTPREL;
7180 }
7181 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7182 {
7183 tls_ty = TLS_TLS | TLS_TPREL;
7184 tls_m = 0;
7185 }
7186
7187 /* Generate relocs for the dynamic linker. */
7188 if ((info->shared || indx != 0)
7189 && (offp == &htab->tlsld_got.offset
7190 || h == NULL
7191 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7192 || h->root.type != bfd_link_hash_undefweak))
7193 {
7194 asection *rsec = htab->relgot;
7195
7196 outrel.r_offset = (htab->got->output_section->vma
7197 + htab->got->output_offset
7198 + off);
7199 outrel.r_addend = 0;
7200 if (tls_ty & (TLS_LD | TLS_GD))
7201 {
7202 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7203 if (tls_ty == (TLS_TLS | TLS_GD))
7204 {
7205 loc = rsec->contents;
7206 loc += (rsec->reloc_count++
7207 * sizeof (Elf32_External_Rela));
7208 bfd_elf32_swap_reloca_out (output_bfd,
7209 &outrel, loc);
7210 outrel.r_offset += 4;
7211 outrel.r_info
7212 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7213 }
7214 }
7215 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7216 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7217 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7218 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7219 else if (indx != 0)
7220 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7221 else if (ifunc != NULL)
7222 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7223 else
7224 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7225 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7226 {
7227 outrel.r_addend += relocation;
7228 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7229 outrel.r_addend -= htab->elf.tls_sec->vma;
7230 }
7231 loc = rsec->contents;
7232 loc += (rsec->reloc_count++
7233 * sizeof (Elf32_External_Rela));
7234 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7235 }
7236
7237 /* Init the .got section contents if we're not
7238 emitting a reloc. */
7239 else
7240 {
7241 bfd_vma value = relocation;
7242
7243 if (tls_ty == (TLS_TLS | TLS_LD))
7244 value = 1;
7245 else if (tls_ty != 0)
7246 {
7247 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7248 if (tls_ty == (TLS_TLS | TLS_TPREL))
7249 value += DTP_OFFSET - TP_OFFSET;
7250
7251 if (tls_ty == (TLS_TLS | TLS_GD))
7252 {
7253 bfd_put_32 (output_bfd, value,
7254 htab->got->contents + off + 4);
7255 value = 1;
7256 }
7257 }
7258 bfd_put_32 (output_bfd, value,
7259 htab->got->contents + off);
7260 }
7261
7262 off += 4;
7263 if (tls_ty & (TLS_LD | TLS_GD))
7264 off += 4;
7265 }
7266 while (tls_m != 0);
7267
7268 off = *offp;
7269 *offp = off | 1;
7270 }
7271
7272 if (off >= (bfd_vma) -2)
7273 abort ();
7274
7275 if ((tls_type & TLS_TLS) != 0)
7276 {
7277 if (tls_type != (TLS_TLS | TLS_LD))
7278 {
7279 if ((tls_mask & TLS_LD) != 0
7280 && !(h == NULL
7281 || !h->def_dynamic))
7282 off += 8;
7283 if (tls_type != (TLS_TLS | TLS_GD))
7284 {
7285 if ((tls_mask & TLS_GD) != 0)
7286 off += 8;
7287 if (tls_type != (TLS_TLS | TLS_DTPREL))
7288 {
7289 if ((tls_mask & TLS_DTPREL) != 0)
7290 off += 4;
7291 }
7292 }
7293 }
7294 }
7295
7296 relocation = (htab->got->output_section->vma
7297 + htab->got->output_offset
7298 + off
7299 - SYM_VAL (htab->elf.hgot));
7300
7301 /* Addends on got relocations don't make much sense.
7302 x+off@got is actually x@got+off, and since the got is
7303 generated by a hash table traversal, the value in the
7304 got at entry m+n bears little relation to the entry m. */
7305 if (addend != 0)
7306 (*_bfd_error_handler)
7307 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7308 input_bfd,
7309 input_section,
7310 (long) rel->r_offset,
7311 howto->name,
7312 sym_name);
7313 }
7314 break;
7315
7316 /* Relocations that need no special processing. */
7317 case R_PPC_LOCAL24PC:
7318 /* It makes no sense to point a local relocation
7319 at a symbol not in this object. */
7320 if (unresolved_reloc)
7321 {
7322 if (! (*info->callbacks->undefined_symbol) (info,
7323 h->root.root.string,
7324 input_bfd,
7325 input_section,
7326 rel->r_offset,
7327 TRUE))
7328 return FALSE;
7329 continue;
7330 }
7331 break;
7332
7333 case R_PPC_DTPREL16:
7334 case R_PPC_DTPREL16_LO:
7335 case R_PPC_DTPREL16_HI:
7336 case R_PPC_DTPREL16_HA:
7337 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7338 break;
7339
7340 /* Relocations that may need to be propagated if this is a shared
7341 object. */
7342 case R_PPC_TPREL16:
7343 case R_PPC_TPREL16_LO:
7344 case R_PPC_TPREL16_HI:
7345 case R_PPC_TPREL16_HA:
7346 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7347 /* The TPREL16 relocs shouldn't really be used in shared
7348 libs as they will result in DT_TEXTREL being set, but
7349 support them anyway. */
7350 goto dodyn;
7351
7352 case R_PPC_TPREL32:
7353 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7354 goto dodyn;
7355
7356 case R_PPC_DTPREL32:
7357 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7358 goto dodyn;
7359
7360 case R_PPC_DTPMOD32:
7361 relocation = 1;
7362 addend = 0;
7363 goto dodyn;
7364
7365 case R_PPC_REL16:
7366 case R_PPC_REL16_LO:
7367 case R_PPC_REL16_HI:
7368 case R_PPC_REL16_HA:
7369 break;
7370
7371 case R_PPC_REL32:
7372 if (h == NULL || h == htab->elf.hgot)
7373 break;
7374 /* fall through */
7375
7376 case R_PPC_ADDR32:
7377 case R_PPC_ADDR16:
7378 case R_PPC_ADDR16_LO:
7379 case R_PPC_ADDR16_HI:
7380 case R_PPC_ADDR16_HA:
7381 case R_PPC_UADDR32:
7382 case R_PPC_UADDR16:
7383 goto dodyn;
7384
7385 case R_PPC_REL24:
7386 case R_PPC_REL14:
7387 case R_PPC_REL14_BRTAKEN:
7388 case R_PPC_REL14_BRNTAKEN:
7389 /* If these relocations are not to a named symbol, they can be
7390 handled right here, no need to bother the dynamic linker. */
7391 if (SYMBOL_CALLS_LOCAL (info, h)
7392 || h == htab->elf.hgot)
7393 break;
7394 /* fall through */
7395
7396 case R_PPC_ADDR24:
7397 case R_PPC_ADDR14:
7398 case R_PPC_ADDR14_BRTAKEN:
7399 case R_PPC_ADDR14_BRNTAKEN:
7400 if (h != NULL && !info->shared)
7401 break;
7402 /* fall through */
7403
7404 dodyn:
7405 if ((input_section->flags & SEC_ALLOC) == 0
7406 || is_vxworks_tls)
7407 break;
7408
7409 if ((info->shared
7410 && !(h != NULL
7411 && ((h->root.type == bfd_link_hash_undefined
7412 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7413 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7414 || (h->root.type == bfd_link_hash_undefweak
7415 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7416 && (must_be_dyn_reloc (info, r_type)
7417 || !SYMBOL_CALLS_LOCAL (info, h)))
7418 || (ELIMINATE_COPY_RELOCS
7419 && !info->shared
7420 && h != NULL
7421 && h->dynindx != -1
7422 && !h->non_got_ref
7423 && !h->def_regular))
7424 {
7425 int skip;
7426
7427 #ifdef DEBUG
7428 fprintf (stderr, "ppc_elf_relocate_section needs to "
7429 "create relocation for %s\n",
7430 (h && h->root.root.string
7431 ? h->root.root.string : "<unknown>"));
7432 #endif
7433
7434 /* When generating a shared object, these relocations
7435 are copied into the output file to be resolved at run
7436 time. */
7437 if (sreloc == NULL)
7438 {
7439 sreloc = elf_section_data (input_section)->sreloc;
7440 if (!htab->elf.dynamic_sections_created)
7441 sreloc = htab->reliplt;
7442 if (sreloc == NULL)
7443 return FALSE;
7444 }
7445
7446 skip = 0;
7447 outrel.r_offset =
7448 _bfd_elf_section_offset (output_bfd, info, input_section,
7449 rel->r_offset);
7450 if (outrel.r_offset == (bfd_vma) -1
7451 || outrel.r_offset == (bfd_vma) -2)
7452 skip = (int) outrel.r_offset;
7453 outrel.r_offset += (input_section->output_section->vma
7454 + input_section->output_offset);
7455
7456 if (skip)
7457 memset (&outrel, 0, sizeof outrel);
7458 else if ((h != NULL
7459 && (h->root.type == bfd_link_hash_undefined
7460 || h->root.type == bfd_link_hash_undefweak))
7461 || !SYMBOL_REFERENCES_LOCAL (info, h))
7462 {
7463 unresolved_reloc = FALSE;
7464 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7465 outrel.r_addend = rel->r_addend;
7466 }
7467 else
7468 {
7469 outrel.r_addend = relocation + rel->r_addend;
7470
7471 if (r_type != R_PPC_ADDR32)
7472 {
7473 long indx = 0;
7474
7475 if (ifunc != NULL)
7476 {
7477 /* If we get here when building a static
7478 executable, then the libc startup function
7479 responsible for applying indirect function
7480 relocations is going to complain about
7481 the reloc type.
7482 If we get here when building a dynamic
7483 executable, it will be because we have
7484 a text relocation. The dynamic loader
7485 will set the text segment writable and
7486 non-executable to apply text relocations.
7487 So we'll segfault when trying to run the
7488 indirection function to resolve the reloc. */
7489 (*_bfd_error_handler)
7490 (_("%B(%A+0x%lx): relocation %s for indirect "
7491 "function %s unsupported"),
7492 input_bfd,
7493 input_section,
7494 (long) rel->r_offset,
7495 howto->name,
7496 sym_name);
7497 ret = FALSE;
7498 }
7499 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7500 ;
7501 else if (sec == NULL || sec->owner == NULL)
7502 {
7503 bfd_set_error (bfd_error_bad_value);
7504 ret = FALSE;
7505 }
7506 else
7507 {
7508 asection *osec;
7509
7510 /* We are turning this relocation into one
7511 against a section symbol. It would be
7512 proper to subtract the symbol's value,
7513 osec->vma, from the emitted reloc addend,
7514 but ld.so expects buggy relocs.
7515 FIXME: Why not always use a zero index? */
7516 osec = sec->output_section;
7517 indx = elf_section_data (osec)->dynindx;
7518 if (indx == 0)
7519 {
7520 osec = htab->elf.text_index_section;
7521 indx = elf_section_data (osec)->dynindx;
7522 }
7523 BFD_ASSERT (indx != 0);
7524 #ifdef DEBUG
7525 if (indx == 0)
7526 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7527 indx, osec->name, osec->flags,
7528 h->root.root.string);
7529 #endif
7530 }
7531
7532 outrel.r_info = ELF32_R_INFO (indx, r_type);
7533 }
7534 else if (ifunc != NULL)
7535 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7536 else
7537 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7538 }
7539
7540 loc = sreloc->contents;
7541 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7542 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7543
7544 if (skip == -1)
7545 continue;
7546
7547 /* This reloc will be computed at runtime. We clear the memory
7548 so that it contains predictable value. */
7549 if (! skip
7550 && ((input_section->flags & SEC_ALLOC) != 0
7551 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7552 {
7553 relocation = howto->pc_relative ? outrel.r_offset : 0;
7554 addend = 0;
7555 break;
7556 }
7557 }
7558 break;
7559
7560 case R_PPC_RELAX32PC_PLT:
7561 case R_PPC_RELAX32_PLT:
7562 if (h != NULL)
7563 {
7564 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7565 info->shared ? addend : 0);
7566 if (htab->plt_type == PLT_NEW)
7567 relocation = (htab->glink->output_section->vma
7568 + htab->glink->output_offset
7569 + ent->glink_offset);
7570 else
7571 relocation = (htab->plt->output_section->vma
7572 + htab->plt->output_offset
7573 + ent->plt.offset);
7574 }
7575 if (r_type == R_PPC_RELAX32_PLT)
7576 goto relax32;
7577 /* Fall thru */
7578
7579 case R_PPC_RELAX32PC:
7580 relocation -= (input_section->output_section->vma
7581 + input_section->output_offset
7582 + rel->r_offset - 4);
7583 /* Fall thru */
7584
7585 case R_PPC_RELAX32:
7586 relax32:
7587 {
7588 unsigned long t0;
7589 unsigned long t1;
7590
7591 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7592 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7593
7594 /* We're clearing the bits for R_PPC_ADDR16_HA
7595 and R_PPC_ADDR16_LO here. */
7596 t0 &= ~0xffff;
7597 t1 &= ~0xffff;
7598
7599 /* t0 is HA, t1 is LO */
7600 relocation += addend;
7601 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7602 t1 |= relocation & 0xffff;
7603
7604 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7605 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7606
7607 /* Rewrite the reloc and convert one of the trailing nop
7608 relocs to describe this relocation. */
7609 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7610 /* The relocs are at the bottom 2 bytes */
7611 rel[0].r_offset += 2;
7612 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7613 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7614 rel[1].r_offset += 4;
7615 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7616 rel++;
7617 }
7618 continue;
7619
7620 /* Indirect .sdata relocation. */
7621 case R_PPC_EMB_SDAI16:
7622 BFD_ASSERT (htab->sdata[0].section != NULL);
7623 relocation
7624 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7625 h, relocation, rel);
7626 break;
7627
7628 /* Indirect .sdata2 relocation. */
7629 case R_PPC_EMB_SDA2I16:
7630 BFD_ASSERT (htab->sdata[1].section != NULL);
7631 relocation
7632 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7633 h, relocation, rel);
7634 break;
7635
7636 /* Handle the TOC16 reloc. We want to use the offset within the .got
7637 section, not the actual VMA. This is appropriate when generating
7638 an embedded ELF object, for which the .got section acts like the
7639 AIX .toc section. */
7640 case R_PPC_TOC16: /* phony GOT16 relocations */
7641 if (sec == NULL || sec->output_section == NULL)
7642 {
7643 unresolved_reloc = TRUE;
7644 break;
7645 }
7646 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7647 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7648
7649 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7650 break;
7651
7652 case R_PPC_PLTREL24:
7653 if (h == NULL || ifunc != NULL)
7654 break;
7655 /* Relocation is to the entry for this symbol in the
7656 procedure linkage table. */
7657 {
7658 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7659 info->shared ? addend : 0);
7660 addend = 0;
7661 if (ent == NULL
7662 || htab->plt == NULL)
7663 {
7664 /* We didn't make a PLT entry for this symbol. This
7665 happens when statically linking PIC code, or when
7666 using -Bsymbolic. */
7667 break;
7668 }
7669
7670 unresolved_reloc = FALSE;
7671 if (htab->plt_type == PLT_NEW)
7672 relocation = (htab->glink->output_section->vma
7673 + htab->glink->output_offset
7674 + ent->glink_offset);
7675 else
7676 relocation = (htab->plt->output_section->vma
7677 + htab->plt->output_offset
7678 + ent->plt.offset);
7679 }
7680 break;
7681
7682 /* Relocate against _SDA_BASE_. */
7683 case R_PPC_SDAREL16:
7684 {
7685 const char *name;
7686
7687 if (sec == NULL || sec->output_section == NULL)
7688 {
7689 unresolved_reloc = TRUE;
7690 break;
7691 }
7692
7693 name = bfd_get_section_name (abfd, sec->output_section);
7694 if (! ((CONST_STRNEQ (name, ".sdata")
7695 && (name[6] == 0 || name[6] == '.'))
7696 || (CONST_STRNEQ (name, ".sbss")
7697 && (name[5] == 0 || name[5] == '.'))))
7698 {
7699 (*_bfd_error_handler)
7700 (_("%B: the target (%s) of a %s relocation is "
7701 "in the wrong output section (%s)"),
7702 input_bfd,
7703 sym_name,
7704 howto->name,
7705 name);
7706 }
7707 addend -= SYM_VAL (htab->sdata[0].sym);
7708 }
7709 break;
7710
7711 /* Relocate against _SDA2_BASE_. */
7712 case R_PPC_EMB_SDA2REL:
7713 {
7714 const char *name;
7715
7716 if (sec == NULL || sec->output_section == NULL)
7717 {
7718 unresolved_reloc = TRUE;
7719 break;
7720 }
7721
7722 name = bfd_get_section_name (abfd, sec->output_section);
7723 if (! (CONST_STRNEQ (name, ".sdata2")
7724 || CONST_STRNEQ (name, ".sbss2")))
7725 {
7726 (*_bfd_error_handler)
7727 (_("%B: the target (%s) of a %s relocation is "
7728 "in the wrong output section (%s)"),
7729 input_bfd,
7730 sym_name,
7731 howto->name,
7732 name);
7733
7734 bfd_set_error (bfd_error_bad_value);
7735 ret = FALSE;
7736 continue;
7737 }
7738 addend -= SYM_VAL (htab->sdata[1].sym);
7739 }
7740 break;
7741
7742 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7743 case R_PPC_EMB_SDA21:
7744 case R_PPC_EMB_RELSDA:
7745 {
7746 const char *name;
7747 int reg;
7748
7749 if (sec == NULL || sec->output_section == NULL)
7750 {
7751 unresolved_reloc = TRUE;
7752 break;
7753 }
7754
7755 name = bfd_get_section_name (abfd, sec->output_section);
7756 if (((CONST_STRNEQ (name, ".sdata")
7757 && (name[6] == 0 || name[6] == '.'))
7758 || (CONST_STRNEQ (name, ".sbss")
7759 && (name[5] == 0 || name[5] == '.'))))
7760 {
7761 reg = 13;
7762 addend -= SYM_VAL (htab->sdata[0].sym);
7763 }
7764 else if (CONST_STRNEQ (name, ".sdata2")
7765 || CONST_STRNEQ (name, ".sbss2"))
7766 {
7767 reg = 2;
7768 addend -= SYM_VAL (htab->sdata[1].sym);
7769 }
7770 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7771 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7772 {
7773 reg = 0;
7774 }
7775 else
7776 {
7777 (*_bfd_error_handler)
7778 (_("%B: the target (%s) of a %s relocation is "
7779 "in the wrong output section (%s)"),
7780 input_bfd,
7781 sym_name,
7782 howto->name,
7783 name);
7784
7785 bfd_set_error (bfd_error_bad_value);
7786 ret = FALSE;
7787 continue;
7788 }
7789
7790 if (r_type == R_PPC_EMB_SDA21)
7791 { /* fill in register field */
7792 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7793 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7794 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7795 }
7796 }
7797 break;
7798
7799 /* Relocate against the beginning of the section. */
7800 case R_PPC_SECTOFF:
7801 case R_PPC_SECTOFF_LO:
7802 case R_PPC_SECTOFF_HI:
7803 case R_PPC_SECTOFF_HA:
7804 if (sec == NULL || sec->output_section == NULL)
7805 {
7806 unresolved_reloc = TRUE;
7807 break;
7808 }
7809 addend -= sec->output_section->vma;
7810 break;
7811
7812 /* Negative relocations. */
7813 case R_PPC_EMB_NADDR32:
7814 case R_PPC_EMB_NADDR16:
7815 case R_PPC_EMB_NADDR16_LO:
7816 case R_PPC_EMB_NADDR16_HI:
7817 case R_PPC_EMB_NADDR16_HA:
7818 addend -= 2 * relocation;
7819 break;
7820
7821 case R_PPC_COPY:
7822 case R_PPC_GLOB_DAT:
7823 case R_PPC_JMP_SLOT:
7824 case R_PPC_RELATIVE:
7825 case R_PPC_IRELATIVE:
7826 case R_PPC_PLT32:
7827 case R_PPC_PLTREL32:
7828 case R_PPC_PLT16_LO:
7829 case R_PPC_PLT16_HI:
7830 case R_PPC_PLT16_HA:
7831 case R_PPC_ADDR30:
7832 case R_PPC_EMB_RELSEC16:
7833 case R_PPC_EMB_RELST_LO:
7834 case R_PPC_EMB_RELST_HI:
7835 case R_PPC_EMB_RELST_HA:
7836 case R_PPC_EMB_BIT_FLD:
7837 (*_bfd_error_handler)
7838 (_("%B: relocation %s is not yet supported for symbol %s."),
7839 input_bfd,
7840 howto->name,
7841 sym_name);
7842
7843 bfd_set_error (bfd_error_invalid_operation);
7844 ret = FALSE;
7845 continue;
7846 }
7847
7848 /* Do any further special processing. */
7849 switch (r_type)
7850 {
7851 default:
7852 break;
7853
7854 case R_PPC_ADDR16_HA:
7855 case R_PPC_REL16_HA:
7856 case R_PPC_SECTOFF_HA:
7857 case R_PPC_TPREL16_HA:
7858 case R_PPC_DTPREL16_HA:
7859 case R_PPC_EMB_NADDR16_HA:
7860 case R_PPC_EMB_RELST_HA:
7861 /* It's just possible that this symbol is a weak symbol
7862 that's not actually defined anywhere. In that case,
7863 'sec' would be NULL, and we should leave the symbol
7864 alone (it will be set to zero elsewhere in the link). */
7865 if (sec == NULL)
7866 break;
7867 /* Fall thru */
7868
7869 case R_PPC_PLT16_HA:
7870 case R_PPC_GOT16_HA:
7871 case R_PPC_GOT_TLSGD16_HA:
7872 case R_PPC_GOT_TLSLD16_HA:
7873 case R_PPC_GOT_TPREL16_HA:
7874 case R_PPC_GOT_DTPREL16_HA:
7875 /* Add 0x10000 if sign bit in 0:15 is set.
7876 Bits 0:15 are not used. */
7877 addend += 0x8000;
7878 break;
7879 }
7880
7881 #ifdef DEBUG
7882 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7883 "offset = %ld, addend = %ld\n",
7884 howto->name,
7885 (int) r_type,
7886 sym_name,
7887 r_symndx,
7888 (long) rel->r_offset,
7889 (long) addend);
7890 #endif
7891
7892 if (unresolved_reloc
7893 && !((input_section->flags & SEC_DEBUGGING) != 0
7894 && h->def_dynamic))
7895 {
7896 (*_bfd_error_handler)
7897 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7898 input_bfd,
7899 input_section,
7900 (long) rel->r_offset,
7901 howto->name,
7902 sym_name);
7903 ret = FALSE;
7904 }
7905
7906 r = _bfd_final_link_relocate (howto,
7907 input_bfd,
7908 input_section,
7909 contents,
7910 rel->r_offset,
7911 relocation,
7912 addend);
7913
7914 if (r != bfd_reloc_ok)
7915 {
7916 if (r == bfd_reloc_overflow)
7917 {
7918 if (warned)
7919 continue;
7920 if (h != NULL
7921 && h->root.type == bfd_link_hash_undefweak
7922 && howto->pc_relative)
7923 {
7924 /* Assume this is a call protected by other code that
7925 detect the symbol is undefined. If this is the case,
7926 we can safely ignore the overflow. If not, the
7927 program is hosed anyway, and a little warning isn't
7928 going to help. */
7929
7930 continue;
7931 }
7932
7933 if (! (*info->callbacks->reloc_overflow) (info,
7934 (h ? &h->root : NULL),
7935 sym_name,
7936 howto->name,
7937 rel->r_addend,
7938 input_bfd,
7939 input_section,
7940 rel->r_offset))
7941 return FALSE;
7942 }
7943 else
7944 {
7945 (*_bfd_error_handler)
7946 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7947 input_bfd, input_section,
7948 (long) rel->r_offset, howto->name, sym_name, (int) r);
7949 ret = FALSE;
7950 }
7951 }
7952 }
7953
7954 #ifdef DEBUG
7955 fprintf (stderr, "\n");
7956 #endif
7957
7958 return ret;
7959 }
7960 \f
7961 /* Finish up dynamic symbol handling. We set the contents of various
7962 dynamic sections here. */
7963
7964 static bfd_boolean
7965 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7966 struct bfd_link_info *info,
7967 struct elf_link_hash_entry *h,
7968 Elf_Internal_Sym *sym)
7969 {
7970 struct ppc_elf_link_hash_table *htab;
7971 struct plt_entry *ent;
7972 bfd_boolean doneone;
7973
7974 #ifdef DEBUG
7975 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7976 h->root.root.string);
7977 #endif
7978
7979 htab = ppc_elf_hash_table (info);
7980 BFD_ASSERT (htab->elf.dynobj != NULL);
7981
7982 doneone = FALSE;
7983 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7984 if (ent->plt.offset != (bfd_vma) -1)
7985 {
7986 if (!doneone)
7987 {
7988 Elf_Internal_Rela rela;
7989 bfd_byte *loc;
7990 bfd_vma reloc_index;
7991
7992 if (htab->plt_type == PLT_NEW
7993 || !htab->elf.dynamic_sections_created
7994 || h->dynindx == -1)
7995 reloc_index = ent->plt.offset / 4;
7996 else
7997 {
7998 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7999 / htab->plt_slot_size);
8000 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8001 && htab->plt_type == PLT_OLD)
8002 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8003 }
8004
8005 /* This symbol has an entry in the procedure linkage table.
8006 Set it up. */
8007 if (htab->plt_type == PLT_VXWORKS
8008 && htab->elf.dynamic_sections_created
8009 && h->dynindx != -1)
8010 {
8011 bfd_vma got_offset;
8012 const bfd_vma *plt_entry;
8013
8014 /* The first three entries in .got.plt are reserved. */
8015 got_offset = (reloc_index + 3) * 4;
8016
8017 /* Use the right PLT. */
8018 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8019 : ppc_elf_vxworks_plt_entry;
8020
8021 /* Fill in the .plt on VxWorks. */
8022 if (info->shared)
8023 {
8024 bfd_put_32 (output_bfd,
8025 plt_entry[0] | PPC_HA (got_offset),
8026 htab->plt->contents + ent->plt.offset + 0);
8027 bfd_put_32 (output_bfd,
8028 plt_entry[1] | PPC_LO (got_offset),
8029 htab->plt->contents + ent->plt.offset + 4);
8030 }
8031 else
8032 {
8033 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8034
8035 bfd_put_32 (output_bfd,
8036 plt_entry[0] | PPC_HA (got_loc),
8037 htab->plt->contents + ent->plt.offset + 0);
8038 bfd_put_32 (output_bfd,
8039 plt_entry[1] | PPC_LO (got_loc),
8040 htab->plt->contents + ent->plt.offset + 4);
8041 }
8042
8043 bfd_put_32 (output_bfd, plt_entry[2],
8044 htab->plt->contents + ent->plt.offset + 8);
8045 bfd_put_32 (output_bfd, plt_entry[3],
8046 htab->plt->contents + ent->plt.offset + 12);
8047
8048 /* This instruction is an immediate load. The value loaded is
8049 the byte offset of the R_PPC_JMP_SLOT relocation from the
8050 start of the .rela.plt section. The value is stored in the
8051 low-order 16 bits of the load instruction. */
8052 /* NOTE: It appears that this is now an index rather than a
8053 prescaled offset. */
8054 bfd_put_32 (output_bfd,
8055 plt_entry[4] | reloc_index,
8056 htab->plt->contents + ent->plt.offset + 16);
8057 /* This instruction is a PC-relative branch whose target is
8058 the start of the PLT section. The address of this branch
8059 instruction is 20 bytes beyond the start of this PLT entry.
8060 The address is encoded in bits 6-29, inclusive. The value
8061 stored is right-shifted by two bits, permitting a 26-bit
8062 offset. */
8063 bfd_put_32 (output_bfd,
8064 (plt_entry[5]
8065 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8066 htab->plt->contents + ent->plt.offset + 20);
8067 bfd_put_32 (output_bfd, plt_entry[6],
8068 htab->plt->contents + ent->plt.offset + 24);
8069 bfd_put_32 (output_bfd, plt_entry[7],
8070 htab->plt->contents + ent->plt.offset + 28);
8071
8072 /* Fill in the GOT entry corresponding to this PLT slot with
8073 the address immediately after the the "bctr" instruction
8074 in this PLT entry. */
8075 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8076 + htab->plt->output_offset
8077 + ent->plt.offset + 16),
8078 htab->sgotplt->contents + got_offset);
8079
8080 if (!info->shared)
8081 {
8082 /* Fill in a couple of entries in .rela.plt.unloaded. */
8083 loc = htab->srelplt2->contents
8084 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8085 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8086 * sizeof (Elf32_External_Rela));
8087
8088 /* Provide the @ha relocation for the first instruction. */
8089 rela.r_offset = (htab->plt->output_section->vma
8090 + htab->plt->output_offset
8091 + ent->plt.offset + 2);
8092 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8093 R_PPC_ADDR16_HA);
8094 rela.r_addend = got_offset;
8095 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8096 loc += sizeof (Elf32_External_Rela);
8097
8098 /* Provide the @l relocation for the second instruction. */
8099 rela.r_offset = (htab->plt->output_section->vma
8100 + htab->plt->output_offset
8101 + ent->plt.offset + 6);
8102 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8103 R_PPC_ADDR16_LO);
8104 rela.r_addend = got_offset;
8105 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8106 loc += sizeof (Elf32_External_Rela);
8107
8108 /* Provide a relocation for the GOT entry corresponding to this
8109 PLT slot. Point it at the middle of the .plt entry. */
8110 rela.r_offset = (htab->sgotplt->output_section->vma
8111 + htab->sgotplt->output_offset
8112 + got_offset);
8113 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8114 R_PPC_ADDR32);
8115 rela.r_addend = ent->plt.offset + 16;
8116 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8117 }
8118
8119 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8120 In particular, the offset for the relocation is not the
8121 address of the PLT entry for this function, as specified
8122 by the ABI. Instead, the offset is set to the address of
8123 the GOT slot for this function. See EABI 4.4.4.1. */
8124 rela.r_offset = (htab->sgotplt->output_section->vma
8125 + htab->sgotplt->output_offset
8126 + got_offset);
8127
8128 }
8129 else
8130 {
8131 asection *splt = htab->plt;
8132 if (!htab->elf.dynamic_sections_created
8133 || h->dynindx == -1)
8134 splt = htab->iplt;
8135
8136 rela.r_offset = (splt->output_section->vma
8137 + splt->output_offset
8138 + ent->plt.offset);
8139 if (htab->plt_type == PLT_OLD
8140 || !htab->elf.dynamic_sections_created
8141 || h->dynindx == -1)
8142 {
8143 /* We don't need to fill in the .plt. The ppc dynamic
8144 linker will fill it in. */
8145 }
8146 else
8147 {
8148 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8149 + htab->glink->output_section->vma
8150 + htab->glink->output_offset);
8151 bfd_put_32 (output_bfd, val,
8152 splt->contents + ent->plt.offset);
8153 }
8154 }
8155
8156 /* Fill in the entry in the .rela.plt section. */
8157 rela.r_addend = 0;
8158 if (!htab->elf.dynamic_sections_created
8159 || h->dynindx == -1)
8160 {
8161 BFD_ASSERT (h->type == STT_GNU_IFUNC
8162 && h->def_regular
8163 && (h->root.type == bfd_link_hash_defined
8164 || h->root.type == bfd_link_hash_defweak));
8165 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8166 rela.r_addend = SYM_VAL (h);
8167 }
8168 else
8169 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8170
8171 if (!htab->elf.dynamic_sections_created
8172 || h->dynindx == -1)
8173 loc = (htab->reliplt->contents
8174 + (htab->reliplt->reloc_count++
8175 * sizeof (Elf32_External_Rela)));
8176 else
8177 loc = (htab->relplt->contents
8178 + reloc_index * sizeof (Elf32_External_Rela));
8179 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8180
8181 if (!h->def_regular)
8182 {
8183 /* Mark the symbol as undefined, rather than as
8184 defined in the .plt section. Leave the value if
8185 there were any relocations where pointer equality
8186 matters (this is a clue for the dynamic linker, to
8187 make function pointer comparisons work between an
8188 application and shared library), otherwise set it
8189 to zero. */
8190 sym->st_shndx = SHN_UNDEF;
8191 if (!h->pointer_equality_needed)
8192 sym->st_value = 0;
8193 else if (!h->ref_regular_nonweak)
8194 {
8195 /* This breaks function pointer comparisons, but
8196 that is better than breaking tests for a NULL
8197 function pointer. */
8198 sym->st_value = 0;
8199 }
8200 }
8201 else if (h->type == STT_GNU_IFUNC
8202 && !info->shared)
8203 {
8204 /* Set the value of ifunc symbols in a non-pie
8205 executable to the glink entry. This is to avoid
8206 text relocations. We can't do this for ifunc in
8207 allocate_dynrelocs, as we do for normal dynamic
8208 function symbols with plt entries, because we need
8209 to keep the original value around for the ifunc
8210 relocation. */
8211 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8212 (output_bfd, htab->glink->output_section));
8213 sym->st_value = (ent->glink_offset +
8214 htab->glink->output_offset
8215 + htab->glink->output_section->vma);
8216 }
8217 doneone = TRUE;
8218 }
8219
8220 if (htab->plt_type == PLT_NEW
8221 || !htab->elf.dynamic_sections_created
8222 || h->dynindx == -1)
8223 {
8224 asection *splt = htab->plt;
8225 if (!htab->elf.dynamic_sections_created
8226 || h->dynindx == -1)
8227 splt = htab->iplt;
8228
8229 write_glink_stub (ent, splt, info);
8230
8231 if (!info->shared)
8232 /* We only need one non-PIC glink stub. */
8233 break;
8234 }
8235 else
8236 break;
8237 }
8238
8239 if (h->needs_copy)
8240 {
8241 asection *s;
8242 Elf_Internal_Rela rela;
8243 bfd_byte *loc;
8244
8245 /* This symbols needs a copy reloc. Set it up. */
8246
8247 #ifdef DEBUG
8248 fprintf (stderr, ", copy");
8249 #endif
8250
8251 BFD_ASSERT (h->dynindx != -1);
8252
8253 if (ppc_elf_hash_entry (h)->has_sda_refs)
8254 s = htab->relsbss;
8255 else
8256 s = htab->relbss;
8257 BFD_ASSERT (s != NULL);
8258
8259 rela.r_offset = SYM_VAL (h);
8260 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8261 rela.r_addend = 0;
8262 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8263 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8264 }
8265
8266 #ifdef DEBUG
8267 fprintf (stderr, "\n");
8268 #endif
8269
8270 /* Mark some specially defined symbols as absolute. */
8271 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8272 || (!htab->is_vxworks
8273 && (h == htab->elf.hgot
8274 || strcmp (h->root.root.string,
8275 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8276 sym->st_shndx = SHN_ABS;
8277
8278 return TRUE;
8279 }
8280 \f
8281 static enum elf_reloc_type_class
8282 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8283 {
8284 switch (ELF32_R_TYPE (rela->r_info))
8285 {
8286 case R_PPC_RELATIVE:
8287 return reloc_class_relative;
8288 case R_PPC_REL24:
8289 case R_PPC_ADDR24:
8290 case R_PPC_JMP_SLOT:
8291 return reloc_class_plt;
8292 case R_PPC_COPY:
8293 return reloc_class_copy;
8294 default:
8295 return reloc_class_normal;
8296 }
8297 }
8298 \f
8299 /* Finish up the dynamic sections. */
8300
8301 static bfd_boolean
8302 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8303 struct bfd_link_info *info)
8304 {
8305 asection *sdyn;
8306 asection *splt;
8307 struct ppc_elf_link_hash_table *htab;
8308 bfd_vma got;
8309 bfd *dynobj;
8310 bfd_boolean ret = TRUE;
8311
8312 #ifdef DEBUG
8313 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8314 #endif
8315
8316 htab = ppc_elf_hash_table (info);
8317 dynobj = elf_hash_table (info)->dynobj;
8318 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8319 if (htab->is_vxworks)
8320 splt = bfd_get_section_by_name (dynobj, ".plt");
8321 else
8322 splt = NULL;
8323
8324 got = 0;
8325 if (htab->elf.hgot != NULL)
8326 got = SYM_VAL (htab->elf.hgot);
8327
8328 if (htab->elf.dynamic_sections_created)
8329 {
8330 Elf32_External_Dyn *dyncon, *dynconend;
8331
8332 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8333
8334 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8335 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8336 for (; dyncon < dynconend; dyncon++)
8337 {
8338 Elf_Internal_Dyn dyn;
8339 asection *s;
8340
8341 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8342
8343 switch (dyn.d_tag)
8344 {
8345 case DT_PLTGOT:
8346 if (htab->is_vxworks)
8347 s = htab->sgotplt;
8348 else
8349 s = htab->plt;
8350 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8351 break;
8352
8353 case DT_PLTRELSZ:
8354 dyn.d_un.d_val = htab->relplt->size;
8355 break;
8356
8357 case DT_JMPREL:
8358 s = htab->relplt;
8359 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8360 break;
8361
8362 case DT_PPC_GOT:
8363 dyn.d_un.d_ptr = got;
8364 break;
8365
8366 case DT_RELASZ:
8367 if (htab->is_vxworks)
8368 {
8369 if (htab->relplt)
8370 dyn.d_un.d_ptr -= htab->relplt->size;
8371 break;
8372 }
8373 continue;
8374
8375 default:
8376 if (htab->is_vxworks
8377 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8378 break;
8379 continue;
8380 }
8381
8382 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8383 }
8384 }
8385
8386 if (htab->got != NULL)
8387 {
8388 if (htab->elf.hgot->root.u.def.section == htab->got
8389 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8390 {
8391 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8392
8393 p += htab->elf.hgot->root.u.def.value;
8394 if (htab->plt_type == PLT_OLD)
8395 {
8396 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8397 so that a function can easily find the address of
8398 _GLOBAL_OFFSET_TABLE_. */
8399 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8400 < htab->elf.hgot->root.u.def.section->size);
8401 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8402 }
8403
8404 if (sdyn != NULL)
8405 {
8406 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8407 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8408 < htab->elf.hgot->root.u.def.section->size);
8409 bfd_put_32 (output_bfd, val, p);
8410 }
8411 }
8412 else
8413 {
8414 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8415 htab->elf.hgot->root.root.string,
8416 (htab->sgotplt != NULL
8417 ? htab->sgotplt->name : htab->got->name));
8418 bfd_set_error (bfd_error_bad_value);
8419 ret = FALSE;
8420 }
8421
8422 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8423 }
8424
8425 /* Fill in the first entry in the VxWorks procedure linkage table. */
8426 if (splt && splt->size > 0)
8427 {
8428 /* Use the right PLT. */
8429 static const bfd_vma *plt_entry = NULL;
8430 plt_entry = info->shared ?
8431 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8432
8433 if (!info->shared)
8434 {
8435 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8436
8437 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8438 splt->contents + 0);
8439 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8440 splt->contents + 4);
8441 }
8442 else
8443 {
8444 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8445 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8446 }
8447 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8448 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8449 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8450 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8451 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8452 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8453
8454 if (! info->shared)
8455 {
8456 Elf_Internal_Rela rela;
8457 bfd_byte *loc;
8458
8459 loc = htab->srelplt2->contents;
8460
8461 /* Output the @ha relocation for the first instruction. */
8462 rela.r_offset = (htab->plt->output_section->vma
8463 + htab->plt->output_offset
8464 + 2);
8465 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8466 rela.r_addend = 0;
8467 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8468 loc += sizeof (Elf32_External_Rela);
8469
8470 /* Output the @l relocation for the second instruction. */
8471 rela.r_offset = (htab->plt->output_section->vma
8472 + htab->plt->output_offset
8473 + 6);
8474 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8475 rela.r_addend = 0;
8476 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8477 loc += sizeof (Elf32_External_Rela);
8478
8479 /* Fix up the remaining relocations. They may have the wrong
8480 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8481 in which symbols were output. */
8482 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8483 {
8484 Elf_Internal_Rela rel;
8485
8486 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8487 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8488 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8489 loc += sizeof (Elf32_External_Rela);
8490
8491 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8492 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8493 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8494 loc += sizeof (Elf32_External_Rela);
8495
8496 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8497 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8498 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8499 loc += sizeof (Elf32_External_Rela);
8500 }
8501 }
8502 }
8503
8504 if (htab->glink != NULL
8505 && htab->glink->contents != NULL
8506 && htab->elf.dynamic_sections_created)
8507 {
8508 unsigned char *p;
8509 unsigned char *endp;
8510 bfd_vma res0;
8511 unsigned int i;
8512
8513 /*
8514 * PIC glink code is the following:
8515 *
8516 * # ith PLT code stub.
8517 * addis 11,30,(plt+(i-1)*4-got)@ha
8518 * lwz 11,(plt+(i-1)*4-got)@l(11)
8519 * mtctr 11
8520 * bctr
8521 *
8522 * # A table of branches, one for each plt entry.
8523 * # The idea is that the plt call stub loads ctr and r11 with these
8524 * # addresses, so (r11 - res_0) gives the plt index * 4.
8525 * res_0: b PLTresolve
8526 * res_1: b PLTresolve
8527 * .
8528 * # Some number of entries towards the end can be nops
8529 * res_n_m3: nop
8530 * res_n_m2: nop
8531 * res_n_m1:
8532 *
8533 * PLTresolve:
8534 * addis 11,11,(1f-res_0)@ha
8535 * mflr 0
8536 * bcl 20,31,1f
8537 * 1: addi 11,11,(1b-res_0)@l
8538 * mflr 12
8539 * mtlr 0
8540 * sub 11,11,12 # r11 = index * 4
8541 * addis 12,12,(got+4-1b)@ha
8542 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8543 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8544 * mtctr 0
8545 * add 0,11,11
8546 * add 11,0,11 # r11 = index * 12 = reloc offset.
8547 * bctr
8548 */
8549 static const unsigned int pic_plt_resolve[] =
8550 {
8551 ADDIS_11_11,
8552 MFLR_0,
8553 BCL_20_31,
8554 ADDI_11_11,
8555 MFLR_12,
8556 MTLR_0,
8557 SUB_11_11_12,
8558 ADDIS_12_12,
8559 LWZ_0_12,
8560 LWZ_12_12,
8561 MTCTR_0,
8562 ADD_0_11_11,
8563 ADD_11_0_11,
8564 BCTR,
8565 NOP,
8566 NOP
8567 };
8568
8569 /*
8570 * Non-PIC glink code is a little simpler.
8571 *
8572 * # ith PLT code stub.
8573 * lis 11,(plt+(i-1)*4)@ha
8574 * lwz 11,(plt+(i-1)*4)@l(11)
8575 * mtctr 11
8576 * bctr
8577 *
8578 * The branch table is the same, then comes
8579 *
8580 * PLTresolve:
8581 * lis 12,(got+4)@ha
8582 * addis 11,11,(-res_0)@ha
8583 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8584 * addi 11,11,(-res_0)@l # r11 = index * 4
8585 * mtctr 0
8586 * add 0,11,11
8587 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8588 * add 11,0,11 # r11 = index * 12 = reloc offset.
8589 * bctr
8590 */
8591 static const unsigned int plt_resolve[] =
8592 {
8593 LIS_12,
8594 ADDIS_11_11,
8595 LWZ_0_12,
8596 ADDI_11_11,
8597 MTCTR_0,
8598 ADD_0_11_11,
8599 LWZ_12_12,
8600 ADD_11_0_11,
8601 BCTR,
8602 NOP,
8603 NOP,
8604 NOP,
8605 NOP,
8606 NOP,
8607 NOP,
8608 NOP
8609 };
8610
8611 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8612 abort ();
8613 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8614 abort ();
8615
8616 /* Build the branch table, one for each plt entry (less one),
8617 and perhaps some padding. */
8618 p = htab->glink->contents;
8619 p += htab->glink_pltresolve;
8620 endp = htab->glink->contents;
8621 endp += htab->glink->size - GLINK_PLTRESOLVE;
8622 while (p < endp - 8 * 4)
8623 {
8624 bfd_put_32 (output_bfd, B + endp - p, p);
8625 p += 4;
8626 }
8627 while (p < endp)
8628 {
8629 bfd_put_32 (output_bfd, NOP, p);
8630 p += 4;
8631 }
8632
8633 res0 = (htab->glink_pltresolve
8634 + htab->glink->output_section->vma
8635 + htab->glink->output_offset);
8636
8637 /* Last comes the PLTresolve stub. */
8638 if (info->shared)
8639 {
8640 bfd_vma bcl;
8641
8642 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8643 {
8644 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8645 p += 4;
8646 }
8647 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8648
8649 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8650 + htab->glink->output_section->vma
8651 + htab->glink->output_offset);
8652
8653 bfd_put_32 (output_bfd,
8654 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8655 bfd_put_32 (output_bfd,
8656 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8657 bfd_put_32 (output_bfd,
8658 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8659 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8660 {
8661 bfd_put_32 (output_bfd,
8662 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8663 bfd_put_32 (output_bfd,
8664 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8665 }
8666 else
8667 {
8668 bfd_put_32 (output_bfd,
8669 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8670 bfd_put_32 (output_bfd,
8671 LWZ_12_12 + 4, p + 9*4);
8672 }
8673 }
8674 else
8675 {
8676 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8677 {
8678 bfd_put_32 (output_bfd, plt_resolve[i], p);
8679 p += 4;
8680 }
8681 p -= 4 * ARRAY_SIZE (plt_resolve);
8682
8683 bfd_put_32 (output_bfd,
8684 LIS_12 + PPC_HA (got + 4), p + 0*4);
8685 bfd_put_32 (output_bfd,
8686 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8687 bfd_put_32 (output_bfd,
8688 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8689 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8690 {
8691 bfd_put_32 (output_bfd,
8692 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8693 bfd_put_32 (output_bfd,
8694 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8695 }
8696 else
8697 {
8698 bfd_put_32 (output_bfd,
8699 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8700 bfd_put_32 (output_bfd,
8701 LWZ_12_12 + 4, p + 6*4);
8702 }
8703 }
8704 }
8705
8706 return ret;
8707 }
8708 \f
8709 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8710 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8711 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8712 #define TARGET_BIG_NAME "elf32-powerpc"
8713 #define ELF_ARCH bfd_arch_powerpc
8714 #define ELF_MACHINE_CODE EM_PPC
8715 #ifdef __QNXTARGET__
8716 #define ELF_MAXPAGESIZE 0x1000
8717 #else
8718 #define ELF_MAXPAGESIZE 0x10000
8719 #endif
8720 #define ELF_MINPAGESIZE 0x1000
8721 #define ELF_COMMONPAGESIZE 0x1000
8722 #define elf_info_to_howto ppc_elf_info_to_howto
8723
8724 #ifdef EM_CYGNUS_POWERPC
8725 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8726 #endif
8727
8728 #ifdef EM_PPC_OLD
8729 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8730 #endif
8731
8732 #define elf_backend_plt_not_loaded 1
8733 #define elf_backend_can_gc_sections 1
8734 #define elf_backend_can_refcount 1
8735 #define elf_backend_rela_normal 1
8736
8737 #define bfd_elf32_mkobject ppc_elf_mkobject
8738 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8739 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8740 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8741 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8742 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8743 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8744 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8745
8746 #define elf_backend_object_p ppc_elf_object_p
8747 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8748 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8749 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8750 #define elf_backend_relocate_section ppc_elf_relocate_section
8751 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8752 #define elf_backend_check_relocs ppc_elf_check_relocs
8753 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8754 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8755 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8756 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8757 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8758 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8759 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8760 #define elf_backend_fake_sections ppc_elf_fake_sections
8761 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8762 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8763 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8764 #define elf_backend_write_core_note ppc_elf_write_core_note
8765 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8766 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8767 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8768 #define elf_backend_write_section ppc_elf_write_section
8769 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8770 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8771 #define elf_backend_action_discarded ppc_elf_action_discarded
8772 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8773 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8774
8775 #include "elf32-target.h"
8776
8777 /* VxWorks Target */
8778
8779 #undef TARGET_LITTLE_SYM
8780 #undef TARGET_LITTLE_NAME
8781
8782 #undef TARGET_BIG_SYM
8783 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8784 #undef TARGET_BIG_NAME
8785 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8786
8787 /* VxWorks uses the elf default section flags for .plt. */
8788 static const struct bfd_elf_special_section *
8789 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8790 {
8791 if (sec->name == NULL)
8792 return NULL;
8793
8794 if (strcmp (sec->name, ".plt") == 0)
8795 return _bfd_elf_get_sec_type_attr (abfd, sec);
8796
8797 return ppc_elf_get_sec_type_attr (abfd, sec);
8798 }
8799
8800 /* Like ppc_elf_link_hash_table_create, but overrides
8801 appropriately for VxWorks. */
8802 static struct bfd_link_hash_table *
8803 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8804 {
8805 struct bfd_link_hash_table *ret;
8806
8807 ret = ppc_elf_link_hash_table_create (abfd);
8808 if (ret)
8809 {
8810 struct ppc_elf_link_hash_table *htab
8811 = (struct ppc_elf_link_hash_table *)ret;
8812 htab->is_vxworks = 1;
8813 htab->plt_type = PLT_VXWORKS;
8814 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8815 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8816 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8817 }
8818 return ret;
8819 }
8820
8821 /* Tweak magic VxWorks symbols as they are loaded. */
8822 static bfd_boolean
8823 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8824 struct bfd_link_info *info,
8825 Elf_Internal_Sym *sym,
8826 const char **namep ATTRIBUTE_UNUSED,
8827 flagword *flagsp ATTRIBUTE_UNUSED,
8828 asection **secp,
8829 bfd_vma *valp)
8830 {
8831 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8832 valp))
8833 return FALSE;
8834
8835 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8836 }
8837
8838 static void
8839 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8840 {
8841 ppc_elf_final_write_processing(abfd, linker);
8842 elf_vxworks_final_write_processing(abfd, linker);
8843 }
8844
8845 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8846 define it. */
8847 #undef elf_backend_want_plt_sym
8848 #define elf_backend_want_plt_sym 1
8849 #undef elf_backend_want_got_plt
8850 #define elf_backend_want_got_plt 1
8851 #undef elf_backend_got_symbol_offset
8852 #define elf_backend_got_symbol_offset 0
8853 #undef elf_backend_plt_not_loaded
8854 #define elf_backend_plt_not_loaded 0
8855 #undef elf_backend_plt_readonly
8856 #define elf_backend_plt_readonly 1
8857 #undef elf_backend_got_header_size
8858 #define elf_backend_got_header_size 12
8859
8860 #undef bfd_elf32_get_synthetic_symtab
8861
8862 #undef bfd_elf32_bfd_link_hash_table_create
8863 #define bfd_elf32_bfd_link_hash_table_create \
8864 ppc_elf_vxworks_link_hash_table_create
8865 #undef elf_backend_add_symbol_hook
8866 #define elf_backend_add_symbol_hook \
8867 ppc_elf_vxworks_add_symbol_hook
8868 #undef elf_backend_link_output_symbol_hook
8869 #define elf_backend_link_output_symbol_hook \
8870 elf_vxworks_link_output_symbol_hook
8871 #undef elf_backend_final_write_processing
8872 #define elf_backend_final_write_processing \
8873 ppc_elf_vxworks_final_write_processing
8874 #undef elf_backend_get_sec_type_attr
8875 #define elf_backend_get_sec_type_attr \
8876 ppc_elf_vxworks_get_sec_type_attr
8877 #undef elf_backend_emit_relocs
8878 #define elf_backend_emit_relocs \
8879 elf_vxworks_emit_relocs
8880
8881 #undef elf32_bed
8882 #define elf32_bed ppc_elf_vxworks_bed
8883 #undef elf_backend_post_process_headers
8884
8885 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.227039 seconds and 5 git commands to generate.