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* elf32-ppc.c (ppc_elf_relocate_section): Fixup D field
[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 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 2 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 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 if (abfd->tdata.any == NULL)
1712 {
1713 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1714 abfd->tdata.any = bfd_zalloc (abfd, amt);
1715 if (abfd->tdata.any == NULL)
1716 return FALSE;
1717 }
1718 return bfd_elf_mkobject (abfd);
1719 }
1720
1721 /* Fix bad default arch selected for a 32 bit input bfd when the
1722 default is 64 bit. */
1723
1724 static bfd_boolean
1725 ppc_elf_object_p (bfd *abfd)
1726 {
1727 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1728 {
1729 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1730
1731 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1732 {
1733 /* Relies on arch after 64 bit default being 32 bit default. */
1734 abfd->arch_info = abfd->arch_info->next;
1735 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1736 }
1737 }
1738 return TRUE;
1739 }
1740
1741 /* Function to set whether a module needs the -mrelocatable bit set. */
1742
1743 static bfd_boolean
1744 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1745 {
1746 BFD_ASSERT (!elf_flags_init (abfd)
1747 || elf_elfheader (abfd)->e_flags == flags);
1748
1749 elf_elfheader (abfd)->e_flags = flags;
1750 elf_flags_init (abfd) = TRUE;
1751 return TRUE;
1752 }
1753
1754 /* Support for core dump NOTE sections. */
1755
1756 static bfd_boolean
1757 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1758 {
1759 int offset;
1760 unsigned int size;
1761
1762 switch (note->descsz)
1763 {
1764 default:
1765 return FALSE;
1766
1767 case 268: /* Linux/PPC. */
1768 /* pr_cursig */
1769 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1770
1771 /* pr_pid */
1772 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1773
1774 /* pr_reg */
1775 offset = 72;
1776 size = 192;
1777
1778 break;
1779 }
1780
1781 /* Make a ".reg/999" section. */
1782 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1783 size, note->descpos + offset);
1784 }
1785
1786 static bfd_boolean
1787 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1788 {
1789 switch (note->descsz)
1790 {
1791 default:
1792 return FALSE;
1793
1794 case 128: /* Linux/PPC elf_prpsinfo. */
1795 elf_tdata (abfd)->core_program
1796 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1797 elf_tdata (abfd)->core_command
1798 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1799 }
1800
1801 /* Note that for some reason, a spurious space is tacked
1802 onto the end of the args in some (at least one anyway)
1803 implementations, so strip it off if it exists. */
1804
1805 {
1806 char *command = elf_tdata (abfd)->core_command;
1807 int n = strlen (command);
1808
1809 if (0 < n && command[n - 1] == ' ')
1810 command[n - 1] = '\0';
1811 }
1812
1813 return TRUE;
1814 }
1815
1816 /* Return address for Ith PLT stub in section PLT, for relocation REL
1817 or (bfd_vma) -1 if it should not be included. */
1818
1819 static bfd_vma
1820 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1821 const asection *plt ATTRIBUTE_UNUSED,
1822 const arelent *rel)
1823 {
1824 return rel->address;
1825 }
1826
1827 /* Handle a PowerPC specific section when reading an object file. This
1828 is called when bfd_section_from_shdr finds a section with an unknown
1829 type. */
1830
1831 static bfd_boolean
1832 ppc_elf_section_from_shdr (bfd *abfd,
1833 Elf_Internal_Shdr *hdr,
1834 const char *name,
1835 int shindex)
1836 {
1837 asection *newsect;
1838 flagword flags;
1839
1840 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1841 return FALSE;
1842
1843 newsect = hdr->bfd_section;
1844 flags = bfd_get_section_flags (abfd, newsect);
1845 if (hdr->sh_flags & SHF_EXCLUDE)
1846 flags |= SEC_EXCLUDE;
1847
1848 if (hdr->sh_type == SHT_ORDERED)
1849 flags |= SEC_SORT_ENTRIES;
1850
1851 bfd_set_section_flags (abfd, newsect, flags);
1852 return TRUE;
1853 }
1854
1855 /* Set up any other section flags and such that may be necessary. */
1856
1857 static bfd_boolean
1858 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1859 Elf_Internal_Shdr *shdr,
1860 asection *asect)
1861 {
1862 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1863 shdr->sh_flags |= SHF_EXCLUDE;
1864
1865 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1866 shdr->sh_type = SHT_ORDERED;
1867
1868 return TRUE;
1869 }
1870
1871 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1872 need to bump up the number of section headers. */
1873
1874 static int
1875 ppc_elf_additional_program_headers (bfd *abfd,
1876 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1877 {
1878 asection *s;
1879 int ret = 0;
1880
1881 s = bfd_get_section_by_name (abfd, ".sbss2");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1886 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1887 ++ret;
1888
1889 return ret;
1890 }
1891
1892 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1893 .PPC.EMB.sbss0 a normal section, and not a bss section so
1894 that the linker doesn't crater when trying to make more than
1895 2 sections. */
1896
1897 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1898 {
1899 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1900 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1901 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1902 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1903 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1904 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1905 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1906 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1907 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1908 { NULL, 0, 0, 0, 0 }
1909 };
1910
1911 /* This is what we want for new plt/got. */
1912 static struct bfd_elf_special_section ppc_alt_plt =
1913 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1914
1915 static const struct bfd_elf_special_section *
1916 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1917 {
1918 const struct bfd_elf_special_section *ssect;
1919
1920 /* See if this is one of the special sections. */
1921 if (sec->name == NULL)
1922 return NULL;
1923
1924 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1925 sec->use_rela_p);
1926 if (ssect != NULL)
1927 {
1928 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1929 ssect = &ppc_alt_plt;
1930 return ssect;
1931 }
1932
1933 return _bfd_elf_get_sec_type_attr (abfd, sec);
1934 }
1935 \f
1936 /* Very simple linked list structure for recording apuinfo values. */
1937 typedef struct apuinfo_list
1938 {
1939 struct apuinfo_list *next;
1940 unsigned long value;
1941 }
1942 apuinfo_list;
1943
1944 static apuinfo_list *head;
1945
1946
1947 static void
1948 apuinfo_list_init (void)
1949 {
1950 head = NULL;
1951 }
1952
1953 static void
1954 apuinfo_list_add (unsigned long value)
1955 {
1956 apuinfo_list *entry = head;
1957
1958 while (entry != NULL)
1959 {
1960 if (entry->value == value)
1961 return;
1962 entry = entry->next;
1963 }
1964
1965 entry = bfd_malloc (sizeof (* entry));
1966 if (entry == NULL)
1967 return;
1968
1969 entry->value = value;
1970 entry->next = head;
1971 head = entry;
1972 }
1973
1974 static unsigned
1975 apuinfo_list_length (void)
1976 {
1977 apuinfo_list *entry;
1978 unsigned long count;
1979
1980 for (entry = head, count = 0;
1981 entry;
1982 entry = entry->next)
1983 ++ count;
1984
1985 return count;
1986 }
1987
1988 static inline unsigned long
1989 apuinfo_list_element (unsigned long number)
1990 {
1991 apuinfo_list * entry;
1992
1993 for (entry = head;
1994 entry && number --;
1995 entry = entry->next)
1996 ;
1997
1998 return entry ? entry->value : 0;
1999 }
2000
2001 static void
2002 apuinfo_list_finish (void)
2003 {
2004 apuinfo_list *entry;
2005
2006 for (entry = head; entry;)
2007 {
2008 apuinfo_list *next = entry->next;
2009 free (entry);
2010 entry = next;
2011 }
2012
2013 head = NULL;
2014 }
2015
2016 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2017 #define APUINFO_LABEL "APUinfo"
2018
2019 /* Scan the input BFDs and create a linked list of
2020 the APUinfo values that will need to be emitted. */
2021
2022 static void
2023 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2024 {
2025 bfd *ibfd;
2026 asection *asec;
2027 char *buffer;
2028 unsigned num_input_sections;
2029 bfd_size_type output_section_size;
2030 unsigned i;
2031 unsigned num_entries;
2032 unsigned long offset;
2033 unsigned long length;
2034 const char *error_message = NULL;
2035
2036 if (link_info == NULL)
2037 return;
2038
2039 /* Scan the input bfds, looking for apuinfo sections. */
2040 num_input_sections = 0;
2041 output_section_size = 0;
2042
2043 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2044 {
2045 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2046 if (asec)
2047 {
2048 ++ num_input_sections;
2049 output_section_size += asec->size;
2050 }
2051 }
2052
2053 /* We need at least one input sections
2054 in order to make merging worthwhile. */
2055 if (num_input_sections < 1)
2056 return;
2057
2058 /* Just make sure that the output section exists as well. */
2059 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2060 if (asec == NULL)
2061 return;
2062
2063 /* Allocate a buffer for the contents of the input sections. */
2064 buffer = bfd_malloc (output_section_size);
2065 if (buffer == NULL)
2066 return;
2067
2068 offset = 0;
2069 apuinfo_list_init ();
2070
2071 /* Read in the input sections contents. */
2072 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2073 {
2074 unsigned long datum;
2075 char *ptr;
2076
2077 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2078 if (asec == NULL)
2079 continue;
2080
2081 length = asec->size;
2082 if (length < 24)
2083 {
2084 error_message = _("corrupt or empty %s section in %B");
2085 goto fail;
2086 }
2087
2088 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2089 || (bfd_bread (buffer + offset, length, ibfd) != length))
2090 {
2091 error_message = _("unable to read in %s section from %B");
2092 goto fail;
2093 }
2094
2095 /* Process the contents of the section. */
2096 ptr = buffer + offset;
2097 error_message = _("corrupt %s section in %B");
2098
2099 /* Verify the contents of the header. Note - we have to
2100 extract the values this way in order to allow for a
2101 host whose endian-ness is different from the target. */
2102 datum = bfd_get_32 (ibfd, ptr);
2103 if (datum != sizeof APUINFO_LABEL)
2104 goto fail;
2105
2106 datum = bfd_get_32 (ibfd, ptr + 8);
2107 if (datum != 0x2)
2108 goto fail;
2109
2110 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2111 goto fail;
2112
2113 /* Get the number of bytes used for apuinfo entries. */
2114 datum = bfd_get_32 (ibfd, ptr + 4);
2115 if (datum + 20 != length)
2116 goto fail;
2117
2118 /* Make sure that we do not run off the end of the section. */
2119 if (offset + length > output_section_size)
2120 goto fail;
2121
2122 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2123 for (i = 0; i < datum; i += 4)
2124 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2125
2126 /* Update the offset. */
2127 offset += length;
2128 }
2129
2130 error_message = NULL;
2131
2132 /* Compute the size of the output section. */
2133 num_entries = apuinfo_list_length ();
2134 output_section_size = 20 + num_entries * 4;
2135
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137
2138 if (! bfd_set_section_size (abfd, asec, output_section_size))
2139 ibfd = abfd,
2140 error_message = _("warning: unable to set size of %s section in %B");
2141
2142 fail:
2143 free (buffer);
2144
2145 if (error_message)
2146 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2147 }
2148
2149 /* Prevent the output section from accumulating the input sections'
2150 contents. We have already stored this in our linked list structure. */
2151
2152 static bfd_boolean
2153 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2154 asection *asec,
2155 bfd_byte *contents ATTRIBUTE_UNUSED)
2156 {
2157 return (apuinfo_list_length ()
2158 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2159 }
2160
2161 /* Finally we can generate the output section. */
2162
2163 static void
2164 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2165 {
2166 bfd_byte *buffer;
2167 asection *asec;
2168 unsigned i;
2169 unsigned num_entries;
2170 bfd_size_type length;
2171
2172 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2173 if (asec == NULL)
2174 return;
2175
2176 if (apuinfo_list_length () == 0)
2177 return;
2178
2179 length = asec->size;
2180 if (length < 20)
2181 return;
2182
2183 buffer = bfd_malloc (length);
2184 if (buffer == NULL)
2185 {
2186 (*_bfd_error_handler)
2187 (_("failed to allocate space for new APUinfo section."));
2188 return;
2189 }
2190
2191 /* Create the apuinfo header. */
2192 num_entries = apuinfo_list_length ();
2193 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2194 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2195 bfd_put_32 (abfd, 0x2, buffer + 8);
2196 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2197
2198 length = 20;
2199 for (i = 0; i < num_entries; i++)
2200 {
2201 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2202 length += 4;
2203 }
2204
2205 if (length != asec->size)
2206 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2207
2208 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2209 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2210
2211 free (buffer);
2212
2213 apuinfo_list_finish ();
2214 }
2215 \f
2216 /* The following functions are specific to the ELF linker, while
2217 functions above are used generally. They appear in this file more
2218 or less in the order in which they are called. eg.
2219 ppc_elf_check_relocs is called early in the link process,
2220 ppc_elf_finish_dynamic_sections is one of the last functions
2221 called. */
2222
2223 /* The PPC linker needs to keep track of the number of relocs that it
2224 decides to copy as dynamic relocs in check_relocs for each symbol.
2225 This is so that it can later discard them if they are found to be
2226 unnecessary. We store the information in a field extending the
2227 regular ELF linker hash table. */
2228
2229 struct ppc_elf_dyn_relocs
2230 {
2231 struct ppc_elf_dyn_relocs *next;
2232
2233 /* The input section of the reloc. */
2234 asection *sec;
2235
2236 /* Total number of relocs copied for the input section. */
2237 bfd_size_type count;
2238
2239 /* Number of pc-relative relocs copied for the input section. */
2240 bfd_size_type pc_count;
2241 };
2242
2243 /* Track PLT entries needed for a given symbol. We might need more
2244 than one glink entry per symbol. */
2245 struct plt_entry
2246 {
2247 struct plt_entry *next;
2248
2249 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2250 This field stores the offset into .got2 used to initialise the
2251 GOT pointer reg. It will always be at least 32768 (and for
2252 current gcc this is the only offset used). */
2253 bfd_vma addend;
2254
2255 /* The .got2 section. */
2256 asection *sec;
2257
2258 /* PLT refcount or offset. */
2259 union
2260 {
2261 bfd_signed_vma refcount;
2262 bfd_vma offset;
2263 } plt;
2264
2265 /* .glink stub offset. */
2266 bfd_vma glink_offset;
2267 };
2268
2269 /* Of those relocs that might be copied as dynamic relocs, this macro
2270 selects those that must be copied when linking a shared library,
2271 even when the symbol is local. */
2272
2273 #define MUST_BE_DYN_RELOC(RTYPE) \
2274 ((RTYPE) != R_PPC_REL24 \
2275 && (RTYPE) != R_PPC_REL14 \
2276 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2277 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2278 && (RTYPE) != R_PPC_REL32)
2279
2280 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2281 copying dynamic variables from a shared lib into an app's dynbss
2282 section, and instead use a dynamic relocation to point into the
2283 shared lib. */
2284 #define ELIMINATE_COPY_RELOCS 1
2285
2286 /* PPC ELF linker hash entry. */
2287
2288 struct ppc_elf_link_hash_entry
2289 {
2290 struct elf_link_hash_entry elf;
2291
2292 /* If this symbol is used in the linker created sections, the processor
2293 specific backend uses this field to map the field into the offset
2294 from the beginning of the section. */
2295 elf_linker_section_pointers_t *linker_section_pointer;
2296
2297 /* Track dynamic relocs copied for this symbol. */
2298 struct ppc_elf_dyn_relocs *dyn_relocs;
2299
2300 /* Contexts in which symbol is used in the GOT (or TOC).
2301 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2302 corresponding relocs are encountered during check_relocs.
2303 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2304 indicate the corresponding GOT entry type is not needed. */
2305 #define TLS_GD 1 /* GD reloc. */
2306 #define TLS_LD 2 /* LD reloc. */
2307 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2308 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2309 #define TLS_TLS 16 /* Any TLS reloc. */
2310 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2311 char tls_mask;
2312
2313 /* Nonzero if we have seen a small data relocation referring to this
2314 symbol. */
2315 unsigned char has_sda_refs;
2316 };
2317
2318 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2319
2320 enum ppc_elf_plt_type {
2321 PLT_UNSET,
2322 PLT_OLD,
2323 PLT_NEW,
2324 PLT_VXWORKS
2325 };
2326
2327 /* PPC ELF linker hash table. */
2328
2329 struct ppc_elf_link_hash_table
2330 {
2331 struct elf_link_hash_table elf;
2332
2333 /* Short-cuts to get to dynamic linker sections. */
2334 asection *got;
2335 asection *relgot;
2336 asection *glink;
2337 asection *plt;
2338 asection *relplt;
2339 asection *dynbss;
2340 asection *relbss;
2341 asection *dynsbss;
2342 asection *relsbss;
2343 elf_linker_section_t sdata[2];
2344 asection *sbss;
2345
2346 /* Shortcut to .__tls_get_addr. */
2347 struct elf_link_hash_entry *tls_get_addr;
2348
2349 /* TLS local dynamic got entry handling. */
2350 union {
2351 bfd_signed_vma refcount;
2352 bfd_vma offset;
2353 } tlsld_got;
2354
2355 /* Offset of PltResolve function in glink. */
2356 bfd_vma glink_pltresolve;
2357
2358 /* Size of reserved GOT entries. */
2359 unsigned int got_header_size;
2360 /* Non-zero if allocating the header left a gap. */
2361 unsigned int got_gap;
2362
2363 /* The type of PLT we have chosen to use. */
2364 enum ppc_elf_plt_type plt_type;
2365
2366 /* Whether we can use the new PLT layout. */
2367 unsigned int can_use_new_plt:1;
2368
2369 /* Set if we should emit symbols for stubs. */
2370 unsigned int emit_stub_syms:1;
2371
2372 /* Small local sym to section mapping cache. */
2373 struct sym_sec_cache sym_sec;
2374
2375 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2376 asection *srelplt2;
2377
2378 /* The .got.plt section (VxWorks only)*/
2379 asection *sgotplt;
2380
2381 /* True if the target system is VxWorks. */
2382 int is_vxworks;
2383
2384 /* The size of PLT entries. */
2385 int plt_entry_size;
2386 /* The distance between adjacent PLT slots. */
2387 int plt_slot_size;
2388 /* The size of the first PLT entry. */
2389 int plt_initial_entry_size;
2390 };
2391
2392 /* Get the PPC ELF linker hash table from a link_info structure. */
2393
2394 #define ppc_elf_hash_table(p) \
2395 ((struct ppc_elf_link_hash_table *) (p)->hash)
2396
2397 /* Create an entry in a PPC ELF linker hash table. */
2398
2399 static struct bfd_hash_entry *
2400 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2401 struct bfd_hash_table *table,
2402 const char *string)
2403 {
2404 /* Allocate the structure if it has not already been allocated by a
2405 subclass. */
2406 if (entry == NULL)
2407 {
2408 entry = bfd_hash_allocate (table,
2409 sizeof (struct ppc_elf_link_hash_entry));
2410 if (entry == NULL)
2411 return entry;
2412 }
2413
2414 /* Call the allocation method of the superclass. */
2415 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2416 if (entry != NULL)
2417 {
2418 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2419 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2420 ppc_elf_hash_entry (entry)->tls_mask = 0;
2421 }
2422
2423 return entry;
2424 }
2425
2426 /* Create a PPC ELF linker hash table. */
2427
2428 static struct bfd_link_hash_table *
2429 ppc_elf_link_hash_table_create (bfd *abfd)
2430 {
2431 struct ppc_elf_link_hash_table *ret;
2432
2433 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2434 if (ret == NULL)
2435 return NULL;
2436
2437 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2438 ppc_elf_link_hash_newfunc,
2439 sizeof (struct ppc_elf_link_hash_entry)))
2440 {
2441 free (ret);
2442 return NULL;
2443 }
2444
2445 ret->elf.init_plt_refcount.refcount = 0;
2446 ret->elf.init_plt_refcount.glist = NULL;
2447 ret->elf.init_plt_offset.offset = 0;
2448 ret->elf.init_plt_offset.glist = NULL;
2449
2450 ret->sdata[0].name = ".sdata";
2451 ret->sdata[0].sym_name = "_SDA_BASE_";
2452 ret->sdata[0].bss_name = ".sbss";
2453
2454 ret->sdata[1].name = ".sdata2";
2455 ret->sdata[1].sym_name = "_SDA2_BASE_";
2456 ret->sdata[1].bss_name = ".sbss2";
2457
2458 ret->plt_entry_size = 12;
2459 ret->plt_slot_size = 8;
2460 ret->plt_initial_entry_size = 72;
2461
2462 ret->is_vxworks = 0;
2463
2464 return &ret->elf.root;
2465 }
2466
2467 /* Create .got and the related sections. */
2468
2469 static bfd_boolean
2470 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2471 {
2472 struct ppc_elf_link_hash_table *htab;
2473 asection *s;
2474 flagword flags;
2475
2476 if (!_bfd_elf_create_got_section (abfd, info))
2477 return FALSE;
2478
2479 htab = ppc_elf_hash_table (info);
2480 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2481 if (s == NULL)
2482 abort ();
2483
2484 if (htab->is_vxworks)
2485 {
2486 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2487 if (!htab->sgotplt)
2488 abort ();
2489 }
2490 else
2491 {
2492 /* The powerpc .got has a blrl instruction in it. Mark it
2493 executable. */
2494 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2495 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2496 if (!bfd_set_section_flags (abfd, s, flags))
2497 return FALSE;
2498 }
2499
2500 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2501 | SEC_LINKER_CREATED | SEC_READONLY);
2502 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2503 if (!htab->relgot
2504 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2505 return FALSE;
2506
2507 return TRUE;
2508 }
2509
2510 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2511 to output sections (just like _bfd_elf_create_dynamic_sections has
2512 to create .dynbss and .rela.bss). */
2513
2514 static bfd_boolean
2515 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2516 {
2517 struct ppc_elf_link_hash_table *htab;
2518 asection *s;
2519 flagword flags;
2520
2521 htab = ppc_elf_hash_table (info);
2522
2523 if (htab->got == NULL
2524 && !ppc_elf_create_got (abfd, info))
2525 return FALSE;
2526
2527 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2528 return FALSE;
2529
2530 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2531 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2532
2533 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2534 htab->glink = s;
2535 if (s == NULL
2536 || !bfd_set_section_alignment (abfd, s, 4))
2537 return FALSE;
2538
2539 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2540 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2541 SEC_ALLOC | SEC_LINKER_CREATED);
2542 htab->dynsbss = s;
2543 if (s == NULL)
2544 return FALSE;
2545
2546 if (! info->shared)
2547 {
2548 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2549 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2550 htab->relsbss = s;
2551 if (s == NULL
2552 || ! bfd_set_section_alignment (abfd, s, 2))
2553 return FALSE;
2554 }
2555
2556 if (htab->is_vxworks
2557 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2558 return FALSE;
2559
2560 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2561 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2562 if (s == NULL)
2563 abort ();
2564
2565 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2566 if (htab->plt_type == PLT_VXWORKS)
2567 /* The VxWorks PLT is a loaded section with contents. */
2568 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2569 return bfd_set_section_flags (abfd, s, flags);
2570 }
2571
2572 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2573
2574 static void
2575 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2576 struct elf_link_hash_entry *dir,
2577 struct elf_link_hash_entry *ind)
2578 {
2579 struct ppc_elf_link_hash_entry *edir, *eind;
2580
2581 edir = (struct ppc_elf_link_hash_entry *) dir;
2582 eind = (struct ppc_elf_link_hash_entry *) ind;
2583
2584 if (eind->dyn_relocs != NULL)
2585 {
2586 if (edir->dyn_relocs != NULL)
2587 {
2588 struct ppc_elf_dyn_relocs **pp;
2589 struct ppc_elf_dyn_relocs *p;
2590
2591 /* Add reloc counts against the indirect sym to the direct sym
2592 list. Merge any entries against the same section. */
2593 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2594 {
2595 struct ppc_elf_dyn_relocs *q;
2596
2597 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2598 if (q->sec == p->sec)
2599 {
2600 q->pc_count += p->pc_count;
2601 q->count += p->count;
2602 *pp = p->next;
2603 break;
2604 }
2605 if (q == NULL)
2606 pp = &p->next;
2607 }
2608 *pp = edir->dyn_relocs;
2609 }
2610
2611 edir->dyn_relocs = eind->dyn_relocs;
2612 eind->dyn_relocs = NULL;
2613 }
2614
2615 edir->tls_mask |= eind->tls_mask;
2616 edir->has_sda_refs |= eind->has_sda_refs;
2617
2618 /* If called to transfer flags for a weakdef during processing
2619 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2620 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2621 if (!(ELIMINATE_COPY_RELOCS
2622 && eind->elf.root.type != bfd_link_hash_indirect
2623 && edir->elf.dynamic_adjusted))
2624 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2625
2626 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2627 edir->elf.ref_regular |= eind->elf.ref_regular;
2628 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2629 edir->elf.needs_plt |= eind->elf.needs_plt;
2630
2631 /* If we were called to copy over info for a weak sym, that's all. */
2632 if (eind->elf.root.type != bfd_link_hash_indirect)
2633 return;
2634
2635 /* Copy over the GOT refcount entries that we may have already seen to
2636 the symbol which just became indirect. */
2637 edir->elf.got.refcount += eind->elf.got.refcount;
2638 eind->elf.got.refcount = 0;
2639
2640 /* And plt entries. */
2641 if (eind->elf.plt.plist != NULL)
2642 {
2643 if (edir->elf.plt.plist != NULL)
2644 {
2645 struct plt_entry **entp;
2646 struct plt_entry *ent;
2647
2648 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2649 {
2650 struct plt_entry *dent;
2651
2652 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2653 if (dent->sec == ent->sec && dent->addend == ent->addend)
2654 {
2655 dent->plt.refcount += ent->plt.refcount;
2656 *entp = ent->next;
2657 break;
2658 }
2659 if (dent == NULL)
2660 entp = &ent->next;
2661 }
2662 *entp = edir->elf.plt.plist;
2663 }
2664
2665 edir->elf.plt.plist = eind->elf.plt.plist;
2666 eind->elf.plt.plist = NULL;
2667 }
2668
2669 if (eind->elf.dynindx != -1)
2670 {
2671 if (edir->elf.dynindx != -1)
2672 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2673 edir->elf.dynstr_index);
2674 edir->elf.dynindx = eind->elf.dynindx;
2675 edir->elf.dynstr_index = eind->elf.dynstr_index;
2676 eind->elf.dynindx = -1;
2677 eind->elf.dynstr_index = 0;
2678 }
2679 }
2680
2681 /* Return 1 if target is one of ours. */
2682
2683 static bfd_boolean
2684 is_ppc_elf_target (const struct bfd_target *targ)
2685 {
2686 extern const bfd_target bfd_elf32_powerpc_vec;
2687 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2688 extern const bfd_target bfd_elf32_powerpcle_vec;
2689
2690 return (targ == &bfd_elf32_powerpc_vec
2691 || targ == &bfd_elf32_powerpc_vxworks_vec
2692 || targ == &bfd_elf32_powerpcle_vec);
2693 }
2694
2695 /* Hook called by the linker routine which adds symbols from an object
2696 file. We use it to put .comm items in .sbss, and not .bss. */
2697
2698 static bfd_boolean
2699 ppc_elf_add_symbol_hook (bfd *abfd,
2700 struct bfd_link_info *info,
2701 Elf_Internal_Sym *sym,
2702 const char **namep ATTRIBUTE_UNUSED,
2703 flagword *flagsp ATTRIBUTE_UNUSED,
2704 asection **secp,
2705 bfd_vma *valp)
2706 {
2707 if (sym->st_shndx == SHN_COMMON
2708 && !info->relocatable
2709 && sym->st_size <= elf_gp_size (abfd)
2710 && is_ppc_elf_target (info->hash->creator))
2711 {
2712 /* Common symbols less than or equal to -G nn bytes are automatically
2713 put into .sbss. */
2714 struct ppc_elf_link_hash_table *htab;
2715
2716 htab = ppc_elf_hash_table (info);
2717 if (htab->sbss == NULL)
2718 {
2719 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2720
2721 if (!htab->elf.dynobj)
2722 htab->elf.dynobj = abfd;
2723
2724 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2725 ".sbss",
2726 flags);
2727 if (htab->sbss == NULL)
2728 return FALSE;
2729 }
2730
2731 *secp = htab->sbss;
2732 *valp = sym->st_size;
2733 }
2734
2735 return TRUE;
2736 }
2737 \f
2738 static bfd_boolean
2739 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2740 elf_linker_section_t *lsect)
2741 {
2742 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2743 TRUE, FALSE, TRUE);
2744 if (lsect->sym == NULL)
2745 return FALSE;
2746 if (lsect->sym->root.type == bfd_link_hash_new)
2747 lsect->sym->non_elf = 0;
2748 lsect->sym->ref_regular = 1;
2749 return TRUE;
2750 }
2751
2752 /* Create a special linker section. */
2753
2754 static bfd_boolean
2755 ppc_elf_create_linker_section (bfd *abfd,
2756 struct bfd_link_info *info,
2757 flagword flags,
2758 elf_linker_section_t *lsect)
2759 {
2760 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2761 asection *s;
2762
2763 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2764 | SEC_LINKER_CREATED);
2765
2766 /* Record the first bfd that needs the special sections. */
2767 if (!htab->elf.dynobj)
2768 htab->elf.dynobj = abfd;
2769
2770 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2771 lsect->name,
2772 flags);
2773 if (s == NULL
2774 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2775 return FALSE;
2776 lsect->section = s;
2777
2778 return create_sdata_sym (htab, lsect);
2779 }
2780
2781 /* Find a linker generated pointer with a given addend and type. */
2782
2783 static elf_linker_section_pointers_t *
2784 elf_find_pointer_linker_section
2785 (elf_linker_section_pointers_t *linker_pointers,
2786 bfd_vma addend,
2787 elf_linker_section_t *lsect)
2788 {
2789 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2790 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2791 return linker_pointers;
2792
2793 return NULL;
2794 }
2795
2796 /* Allocate a pointer to live in a linker created section. */
2797
2798 static bfd_boolean
2799 elf_create_pointer_linker_section (bfd *abfd,
2800 elf_linker_section_t *lsect,
2801 struct elf_link_hash_entry *h,
2802 const Elf_Internal_Rela *rel)
2803 {
2804 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2805 elf_linker_section_pointers_t *linker_section_ptr;
2806 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2807 bfd_size_type amt;
2808
2809 BFD_ASSERT (lsect != NULL);
2810
2811 /* Is this a global symbol? */
2812 if (h != NULL)
2813 {
2814 struct ppc_elf_link_hash_entry *eh;
2815
2816 /* Has this symbol already been allocated? If so, our work is done. */
2817 eh = (struct ppc_elf_link_hash_entry *) h;
2818 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2819 rel->r_addend,
2820 lsect))
2821 return TRUE;
2822
2823 ptr_linker_section_ptr = &eh->linker_section_pointer;
2824 }
2825 else
2826 {
2827 /* Allocation of a pointer to a local symbol. */
2828 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2829
2830 /* Allocate a table to hold the local symbols if first time. */
2831 if (!ptr)
2832 {
2833 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2834
2835 amt = num_symbols;
2836 amt *= sizeof (elf_linker_section_pointers_t *);
2837 ptr = bfd_zalloc (abfd, amt);
2838
2839 if (!ptr)
2840 return FALSE;
2841
2842 elf_local_ptr_offsets (abfd) = ptr;
2843 }
2844
2845 /* Has this symbol already been allocated? If so, our work is done. */
2846 if (elf_find_pointer_linker_section (ptr[r_symndx],
2847 rel->r_addend,
2848 lsect))
2849 return TRUE;
2850
2851 ptr_linker_section_ptr = &ptr[r_symndx];
2852 }
2853
2854 /* Allocate space for a pointer in the linker section, and allocate
2855 a new pointer record from internal memory. */
2856 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2857 amt = sizeof (elf_linker_section_pointers_t);
2858 linker_section_ptr = bfd_alloc (abfd, amt);
2859
2860 if (!linker_section_ptr)
2861 return FALSE;
2862
2863 linker_section_ptr->next = *ptr_linker_section_ptr;
2864 linker_section_ptr->addend = rel->r_addend;
2865 linker_section_ptr->lsect = lsect;
2866 *ptr_linker_section_ptr = linker_section_ptr;
2867
2868 linker_section_ptr->offset = lsect->section->size;
2869 lsect->section->size += 4;
2870
2871 #ifdef DEBUG
2872 fprintf (stderr,
2873 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2874 lsect->name, (long) linker_section_ptr->offset,
2875 (long) lsect->section->size);
2876 #endif
2877
2878 return TRUE;
2879 }
2880
2881 static bfd_boolean
2882 update_local_sym_info (bfd *abfd,
2883 Elf_Internal_Shdr *symtab_hdr,
2884 unsigned long r_symndx,
2885 int tls_type)
2886 {
2887 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2888 char *local_got_tls_masks;
2889
2890 if (local_got_refcounts == NULL)
2891 {
2892 bfd_size_type size = symtab_hdr->sh_info;
2893
2894 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2895 local_got_refcounts = bfd_zalloc (abfd, size);
2896 if (local_got_refcounts == NULL)
2897 return FALSE;
2898 elf_local_got_refcounts (abfd) = local_got_refcounts;
2899 }
2900
2901 local_got_refcounts[r_symndx] += 1;
2902 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2903 local_got_tls_masks[r_symndx] |= tls_type;
2904 return TRUE;
2905 }
2906
2907 static bfd_boolean
2908 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2909 asection *sec, bfd_vma addend)
2910 {
2911 struct plt_entry *ent;
2912
2913 if (addend < 32768)
2914 sec = NULL;
2915 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2916 if (ent->sec == sec && ent->addend == addend)
2917 break;
2918 if (ent == NULL)
2919 {
2920 bfd_size_type amt = sizeof (*ent);
2921 ent = bfd_alloc (abfd, amt);
2922 if (ent == NULL)
2923 return FALSE;
2924 ent->next = h->plt.plist;
2925 ent->sec = sec;
2926 ent->addend = addend;
2927 ent->plt.refcount = 0;
2928 h->plt.plist = ent;
2929 }
2930 ent->plt.refcount += 1;
2931 return TRUE;
2932 }
2933
2934 static struct plt_entry *
2935 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2936 {
2937 struct plt_entry *ent;
2938
2939 if (addend < 32768)
2940 sec = NULL;
2941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2942 if (ent->sec == sec && ent->addend == addend)
2943 break;
2944 return ent;
2945 }
2946
2947 static void
2948 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2949 {
2950 (*_bfd_error_handler)
2951 (_("%B: relocation %s cannot be used when making a shared object"),
2952 abfd,
2953 ppc_elf_howto_table[r_type]->name);
2954 bfd_set_error (bfd_error_bad_value);
2955 }
2956
2957 /* Look through the relocs for a section during the first phase, and
2958 allocate space in the global offset table or procedure linkage
2959 table. */
2960
2961 static bfd_boolean
2962 ppc_elf_check_relocs (bfd *abfd,
2963 struct bfd_link_info *info,
2964 asection *sec,
2965 const Elf_Internal_Rela *relocs)
2966 {
2967 struct ppc_elf_link_hash_table *htab;
2968 Elf_Internal_Shdr *symtab_hdr;
2969 struct elf_link_hash_entry **sym_hashes;
2970 const Elf_Internal_Rela *rel;
2971 const Elf_Internal_Rela *rel_end;
2972 asection *got2, *sreloc;
2973
2974 if (info->relocatable)
2975 return TRUE;
2976
2977 /* Don't do anything special with non-loaded, non-alloced sections.
2978 In particular, any relocs in such sections should not affect GOT
2979 and PLT reference counting (ie. we don't allow them to create GOT
2980 or PLT entries), there's no possibility or desire to optimize TLS
2981 relocs, and there's not much point in propagating relocs to shared
2982 libs that the dynamic linker won't relocate. */
2983 if ((sec->flags & SEC_ALLOC) == 0)
2984 return TRUE;
2985
2986 #ifdef DEBUG
2987 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2988 sec, abfd);
2989 #endif
2990
2991 /* Initialize howto table if not already done. */
2992 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2993 ppc_elf_howto_init ();
2994
2995 htab = ppc_elf_hash_table (info);
2996 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2997 sym_hashes = elf_sym_hashes (abfd);
2998 got2 = bfd_get_section_by_name (abfd, ".got2");
2999 sreloc = NULL;
3000
3001 rel_end = relocs + sec->reloc_count;
3002 for (rel = relocs; rel < rel_end; rel++)
3003 {
3004 unsigned long r_symndx;
3005 enum elf_ppc_reloc_type r_type;
3006 struct elf_link_hash_entry *h;
3007 int tls_type = 0;
3008
3009 r_symndx = ELF32_R_SYM (rel->r_info);
3010 if (r_symndx < symtab_hdr->sh_info)
3011 h = NULL;
3012 else
3013 {
3014 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3015 while (h->root.type == bfd_link_hash_indirect
3016 || h->root.type == bfd_link_hash_warning)
3017 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3018 }
3019
3020 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3021 This shows up in particular in an R_PPC_ADDR32 in the eabi
3022 startup code. */
3023 if (h != NULL
3024 && htab->got == NULL
3025 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3026 {
3027 if (htab->elf.dynobj == NULL)
3028 htab->elf.dynobj = abfd;
3029 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3030 return FALSE;
3031 BFD_ASSERT (h == htab->elf.hgot);
3032 }
3033
3034 r_type = ELF32_R_TYPE (rel->r_info);
3035 switch (r_type)
3036 {
3037 case R_PPC_GOT_TLSLD16:
3038 case R_PPC_GOT_TLSLD16_LO:
3039 case R_PPC_GOT_TLSLD16_HI:
3040 case R_PPC_GOT_TLSLD16_HA:
3041 htab->tlsld_got.refcount += 1;
3042 tls_type = TLS_TLS | TLS_LD;
3043 goto dogottls;
3044
3045 case R_PPC_GOT_TLSGD16:
3046 case R_PPC_GOT_TLSGD16_LO:
3047 case R_PPC_GOT_TLSGD16_HI:
3048 case R_PPC_GOT_TLSGD16_HA:
3049 tls_type = TLS_TLS | TLS_GD;
3050 goto dogottls;
3051
3052 case R_PPC_GOT_TPREL16:
3053 case R_PPC_GOT_TPREL16_LO:
3054 case R_PPC_GOT_TPREL16_HI:
3055 case R_PPC_GOT_TPREL16_HA:
3056 if (info->shared)
3057 info->flags |= DF_STATIC_TLS;
3058 tls_type = TLS_TLS | TLS_TPREL;
3059 goto dogottls;
3060
3061 case R_PPC_GOT_DTPREL16:
3062 case R_PPC_GOT_DTPREL16_LO:
3063 case R_PPC_GOT_DTPREL16_HI:
3064 case R_PPC_GOT_DTPREL16_HA:
3065 tls_type = TLS_TLS | TLS_DTPREL;
3066 dogottls:
3067 sec->has_tls_reloc = 1;
3068 /* Fall thru */
3069
3070 /* GOT16 relocations */
3071 case R_PPC_GOT16:
3072 case R_PPC_GOT16_LO:
3073 case R_PPC_GOT16_HI:
3074 case R_PPC_GOT16_HA:
3075 /* This symbol requires a global offset table entry. */
3076 if (htab->got == NULL)
3077 {
3078 if (htab->elf.dynobj == NULL)
3079 htab->elf.dynobj = abfd;
3080 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3081 return FALSE;
3082 }
3083 if (h != NULL)
3084 {
3085 h->got.refcount += 1;
3086 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3087 }
3088 else
3089 /* This is a global offset table entry for a local symbol. */
3090 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3091 return FALSE;
3092 break;
3093
3094 /* Indirect .sdata relocation. */
3095 case R_PPC_EMB_SDAI16:
3096 if (info->shared)
3097 {
3098 bad_shared_reloc (abfd, r_type);
3099 return FALSE;
3100 }
3101 if (htab->sdata[0].section == NULL
3102 && !ppc_elf_create_linker_section (abfd, info, 0,
3103 &htab->sdata[0]))
3104 return FALSE;
3105 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3106 h, rel))
3107 return FALSE;
3108 if (h != NULL)
3109 {
3110 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3111 h->non_got_ref = TRUE;
3112 }
3113 break;
3114
3115 /* Indirect .sdata2 relocation. */
3116 case R_PPC_EMB_SDA2I16:
3117 if (info->shared)
3118 {
3119 bad_shared_reloc (abfd, r_type);
3120 return FALSE;
3121 }
3122 if (htab->sdata[1].section == NULL
3123 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3124 &htab->sdata[1]))
3125 return FALSE;
3126 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3127 h, rel))
3128 return FALSE;
3129 if (h != NULL)
3130 {
3131 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3132 h->non_got_ref = TRUE;
3133 }
3134 break;
3135
3136 case R_PPC_SDAREL16:
3137 if (info->shared)
3138 {
3139 bad_shared_reloc (abfd, r_type);
3140 return FALSE;
3141 }
3142 if (htab->sdata[0].sym == NULL
3143 && !create_sdata_sym (htab, &htab->sdata[0]))
3144 return FALSE;
3145 if (h != NULL)
3146 {
3147 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3148 h->non_got_ref = TRUE;
3149 }
3150 break;
3151
3152 case R_PPC_EMB_SDA2REL:
3153 if (info->shared)
3154 {
3155 bad_shared_reloc (abfd, r_type);
3156 return FALSE;
3157 }
3158 if (htab->sdata[1].sym == NULL
3159 && !create_sdata_sym (htab, &htab->sdata[1]))
3160 return FALSE;
3161 if (h != NULL)
3162 {
3163 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3164 h->non_got_ref = TRUE;
3165 }
3166 break;
3167
3168 case R_PPC_EMB_SDA21:
3169 case R_PPC_EMB_RELSDA:
3170 if (info->shared)
3171 {
3172 bad_shared_reloc (abfd, r_type);
3173 return FALSE;
3174 }
3175 if (htab->sdata[0].sym == NULL
3176 && !create_sdata_sym (htab, &htab->sdata[0]))
3177 return FALSE;
3178 if (htab->sdata[1].sym == NULL
3179 && !create_sdata_sym (htab, &htab->sdata[1]))
3180 return FALSE;
3181 if (h != NULL)
3182 {
3183 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3184 h->non_got_ref = TRUE;
3185 }
3186 break;
3187
3188 case R_PPC_EMB_NADDR32:
3189 case R_PPC_EMB_NADDR16:
3190 case R_PPC_EMB_NADDR16_LO:
3191 case R_PPC_EMB_NADDR16_HI:
3192 case R_PPC_EMB_NADDR16_HA:
3193 if (info->shared)
3194 {
3195 bad_shared_reloc (abfd, r_type);
3196 return FALSE;
3197 }
3198 if (h != NULL)
3199 h->non_got_ref = TRUE;
3200 break;
3201
3202 case R_PPC_PLT32:
3203 case R_PPC_PLTREL24:
3204 case R_PPC_PLTREL32:
3205 case R_PPC_PLT16_LO:
3206 case R_PPC_PLT16_HI:
3207 case R_PPC_PLT16_HA:
3208 #ifdef DEBUG
3209 fprintf (stderr, "Reloc requires a PLT entry\n");
3210 #endif
3211 /* This symbol requires a procedure linkage table entry. We
3212 actually build the entry in finish_dynamic_symbol,
3213 because this might be a case of linking PIC code without
3214 linking in any dynamic objects, in which case we don't
3215 need to generate a procedure linkage table after all. */
3216
3217 if (h == NULL)
3218 {
3219 /* It does not make sense to have a procedure linkage
3220 table entry for a local symbol. */
3221 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3222 "local symbol"),
3223 abfd,
3224 sec,
3225 (long) rel->r_offset,
3226 ppc_elf_howto_table[r_type]->name);
3227 bfd_set_error (bfd_error_bad_value);
3228 return FALSE;
3229 }
3230 else
3231 {
3232 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3233
3234 h->needs_plt = 1;
3235 if (!update_plt_info (abfd, h, got2, addend))
3236 return FALSE;
3237 }
3238 break;
3239
3240 /* The following relocations don't need to propagate the
3241 relocation if linking a shared object since they are
3242 section relative. */
3243 case R_PPC_SECTOFF:
3244 case R_PPC_SECTOFF_LO:
3245 case R_PPC_SECTOFF_HI:
3246 case R_PPC_SECTOFF_HA:
3247 case R_PPC_DTPREL16:
3248 case R_PPC_DTPREL16_LO:
3249 case R_PPC_DTPREL16_HI:
3250 case R_PPC_DTPREL16_HA:
3251 case R_PPC_TOC16:
3252 break;
3253
3254 case R_PPC_REL16:
3255 case R_PPC_REL16_LO:
3256 case R_PPC_REL16_HI:
3257 case R_PPC_REL16_HA:
3258 htab->can_use_new_plt = 1;
3259 break;
3260
3261 /* These are just markers. */
3262 case R_PPC_TLS:
3263 case R_PPC_EMB_MRKREF:
3264 case R_PPC_NONE:
3265 case R_PPC_max:
3266 break;
3267
3268 /* These should only appear in dynamic objects. */
3269 case R_PPC_COPY:
3270 case R_PPC_GLOB_DAT:
3271 case R_PPC_JMP_SLOT:
3272 case R_PPC_RELATIVE:
3273 break;
3274
3275 /* These aren't handled yet. We'll report an error later. */
3276 case R_PPC_ADDR30:
3277 case R_PPC_EMB_RELSEC16:
3278 case R_PPC_EMB_RELST_LO:
3279 case R_PPC_EMB_RELST_HI:
3280 case R_PPC_EMB_RELST_HA:
3281 case R_PPC_EMB_BIT_FLD:
3282 break;
3283
3284 /* This refers only to functions defined in the shared library. */
3285 case R_PPC_LOCAL24PC:
3286 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3287 htab->plt_type = PLT_OLD;
3288 break;
3289
3290 /* This relocation describes the C++ object vtable hierarchy.
3291 Reconstruct it for later use during GC. */
3292 case R_PPC_GNU_VTINHERIT:
3293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3294 return FALSE;
3295 break;
3296
3297 /* This relocation describes which C++ vtable entries are actually
3298 used. Record for later use during GC. */
3299 case R_PPC_GNU_VTENTRY:
3300 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3301 return FALSE;
3302 break;
3303
3304 /* We shouldn't really be seeing these. */
3305 case R_PPC_TPREL32:
3306 if (info->shared)
3307 info->flags |= DF_STATIC_TLS;
3308 goto dodyn;
3309
3310 /* Nor these. */
3311 case R_PPC_DTPMOD32:
3312 case R_PPC_DTPREL32:
3313 goto dodyn;
3314
3315 case R_PPC_TPREL16:
3316 case R_PPC_TPREL16_LO:
3317 case R_PPC_TPREL16_HI:
3318 case R_PPC_TPREL16_HA:
3319 if (info->shared)
3320 info->flags |= DF_STATIC_TLS;
3321 goto dodyn;
3322
3323 case R_PPC_REL32:
3324 if (h == NULL
3325 && got2 != NULL
3326 && (sec->flags & SEC_CODE) != 0
3327 && (info->shared || info->pie)
3328 && htab->plt_type == PLT_UNSET)
3329 {
3330 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3331 the start of a function, which assembles to a REL32
3332 reference to .got2. If we detect one of these, then
3333 force the old PLT layout because the linker cannot
3334 reliably deduce the GOT pointer value needed for
3335 PLT call stubs. */
3336 asection *s;
3337
3338 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3339 r_symndx);
3340 if (s == got2)
3341 htab->plt_type = PLT_OLD;
3342 }
3343 if (h == NULL || h == htab->elf.hgot)
3344 break;
3345 goto dodyn1;
3346
3347 case R_PPC_REL24:
3348 case R_PPC_REL14:
3349 case R_PPC_REL14_BRTAKEN:
3350 case R_PPC_REL14_BRNTAKEN:
3351 if (h == NULL)
3352 break;
3353 if (h == htab->elf.hgot)
3354 {
3355 if (htab->plt_type == PLT_UNSET)
3356 htab->plt_type = PLT_OLD;
3357 break;
3358 }
3359 /* fall through */
3360
3361 case R_PPC_ADDR32:
3362 case R_PPC_ADDR24:
3363 case R_PPC_ADDR16:
3364 case R_PPC_ADDR16_LO:
3365 case R_PPC_ADDR16_HI:
3366 case R_PPC_ADDR16_HA:
3367 case R_PPC_ADDR14:
3368 case R_PPC_ADDR14_BRTAKEN:
3369 case R_PPC_ADDR14_BRNTAKEN:
3370 case R_PPC_UADDR32:
3371 case R_PPC_UADDR16:
3372 dodyn1:
3373 if (h != NULL && !info->shared)
3374 {
3375 /* We may need a plt entry if the symbol turns out to be
3376 a function defined in a dynamic object. */
3377 if (!update_plt_info (abfd, h, NULL, 0))
3378 return FALSE;
3379
3380 /* We may need a copy reloc too. */
3381 h->non_got_ref = 1;
3382 }
3383
3384 dodyn:
3385 /* If we are creating a shared library, and this is a reloc
3386 against a global symbol, or a non PC relative reloc
3387 against a local symbol, then we need to copy the reloc
3388 into the shared library. However, if we are linking with
3389 -Bsymbolic, we do not need to copy a reloc against a
3390 global symbol which is defined in an object we are
3391 including in the link (i.e., DEF_REGULAR is set). At
3392 this point we have not seen all the input files, so it is
3393 possible that DEF_REGULAR is not set now but will be set
3394 later (it is never cleared). In case of a weak definition,
3395 DEF_REGULAR may be cleared later by a strong definition in
3396 a shared library. We account for that possibility below by
3397 storing information in the dyn_relocs field of the hash
3398 table entry. A similar situation occurs when creating
3399 shared libraries and symbol visibility changes render the
3400 symbol local.
3401
3402 If on the other hand, we are creating an executable, we
3403 may need to keep relocations for symbols satisfied by a
3404 dynamic library if we manage to avoid copy relocs for the
3405 symbol. */
3406 if ((info->shared
3407 && (MUST_BE_DYN_RELOC (r_type)
3408 || (h != NULL
3409 && (! info->symbolic
3410 || h->root.type == bfd_link_hash_defweak
3411 || !h->def_regular))))
3412 || (ELIMINATE_COPY_RELOCS
3413 && !info->shared
3414 && h != NULL
3415 && (h->root.type == bfd_link_hash_defweak
3416 || !h->def_regular)))
3417 {
3418 struct ppc_elf_dyn_relocs *p;
3419 struct ppc_elf_dyn_relocs **head;
3420
3421 #ifdef DEBUG
3422 fprintf (stderr,
3423 "ppc_elf_check_relocs needs to "
3424 "create relocation for %s\n",
3425 (h && h->root.root.string
3426 ? h->root.root.string : "<unknown>"));
3427 #endif
3428 if (sreloc == NULL)
3429 {
3430 const char *name;
3431
3432 name = (bfd_elf_string_from_elf_section
3433 (abfd,
3434 elf_elfheader (abfd)->e_shstrndx,
3435 elf_section_data (sec)->rel_hdr.sh_name));
3436 if (name == NULL)
3437 return FALSE;
3438
3439 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3440 && strcmp (bfd_get_section_name (abfd, sec),
3441 name + 5) == 0);
3442
3443 if (htab->elf.dynobj == NULL)
3444 htab->elf.dynobj = abfd;
3445 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3446 if (sreloc == NULL)
3447 {
3448 flagword flags;
3449
3450 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3451 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3452 | SEC_ALLOC | SEC_LOAD);
3453 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3454 name,
3455 flags);
3456 if (sreloc == NULL
3457 || ! bfd_set_section_alignment (htab->elf.dynobj,
3458 sreloc, 2))
3459 return FALSE;
3460 }
3461 elf_section_data (sec)->sreloc = sreloc;
3462 }
3463
3464 /* If this is a global symbol, we count the number of
3465 relocations we need for this symbol. */
3466 if (h != NULL)
3467 {
3468 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3469 }
3470 else
3471 {
3472 /* Track dynamic relocs needed for local syms too.
3473 We really need local syms available to do this
3474 easily. Oh well. */
3475
3476 asection *s;
3477 void *vpp;
3478
3479 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3480 sec, r_symndx);
3481 if (s == NULL)
3482 return FALSE;
3483
3484 vpp = &elf_section_data (s)->local_dynrel;
3485 head = (struct ppc_elf_dyn_relocs **) vpp;
3486 }
3487
3488 p = *head;
3489 if (p == NULL || p->sec != sec)
3490 {
3491 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3492 if (p == NULL)
3493 return FALSE;
3494 p->next = *head;
3495 *head = p;
3496 p->sec = sec;
3497 p->count = 0;
3498 p->pc_count = 0;
3499 }
3500
3501 p->count += 1;
3502 if (!MUST_BE_DYN_RELOC (r_type))
3503 p->pc_count += 1;
3504 }
3505
3506 break;
3507 }
3508 }
3509
3510 return TRUE;
3511 }
3512 \f
3513 /* Merge backend specific data from an object file to the output
3514 object file when linking. */
3515
3516 static bfd_boolean
3517 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3518 {
3519 flagword old_flags;
3520 flagword new_flags;
3521 bfd_boolean error;
3522
3523 if (!is_ppc_elf_target (ibfd->xvec)
3524 || !is_ppc_elf_target (obfd->xvec))
3525 return TRUE;
3526
3527 /* Check if we have the same endianess. */
3528 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3529 return FALSE;
3530
3531 new_flags = elf_elfheader (ibfd)->e_flags;
3532 old_flags = elf_elfheader (obfd)->e_flags;
3533 if (!elf_flags_init (obfd))
3534 {
3535 /* First call, no flags set. */
3536 elf_flags_init (obfd) = TRUE;
3537 elf_elfheader (obfd)->e_flags = new_flags;
3538 }
3539
3540 /* Compatible flags are ok. */
3541 else if (new_flags == old_flags)
3542 ;
3543
3544 /* Incompatible flags. */
3545 else
3546 {
3547 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3548 to be linked with either. */
3549 error = FALSE;
3550 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3551 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3552 {
3553 error = TRUE;
3554 (*_bfd_error_handler)
3555 (_("%B: compiled with -mrelocatable and linked with "
3556 "modules compiled normally"), ibfd);
3557 }
3558 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3559 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3560 {
3561 error = TRUE;
3562 (*_bfd_error_handler)
3563 (_("%B: compiled normally and linked with "
3564 "modules compiled with -mrelocatable"), ibfd);
3565 }
3566
3567 /* The output is -mrelocatable-lib iff both the input files are. */
3568 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3569 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3570
3571 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3572 but each input file is either -mrelocatable or -mrelocatable-lib. */
3573 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3574 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3575 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3576 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3577
3578 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3579 any module uses it. */
3580 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3581
3582 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3583 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3584
3585 /* Warn about any other mismatches. */
3586 if (new_flags != old_flags)
3587 {
3588 error = TRUE;
3589 (*_bfd_error_handler)
3590 (_("%B: uses different e_flags (0x%lx) fields "
3591 "than previous modules (0x%lx)"),
3592 ibfd, (long) new_flags, (long) old_flags);
3593 }
3594
3595 if (error)
3596 {
3597 bfd_set_error (bfd_error_bad_value);
3598 return FALSE;
3599 }
3600 }
3601
3602 return TRUE;
3603 }
3604 \f
3605 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3606 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3607 int
3608 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3609 struct bfd_link_info *info,
3610 int force_old_plt,
3611 int emit_stub_syms)
3612 {
3613 struct ppc_elf_link_hash_table *htab;
3614 flagword flags;
3615
3616 htab = ppc_elf_hash_table (info);
3617
3618 if (htab->plt_type == PLT_UNSET)
3619 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3620 ? PLT_OLD : PLT_NEW);
3621
3622 htab->emit_stub_syms = emit_stub_syms;
3623
3624 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3625
3626 if (htab->plt_type == PLT_NEW)
3627 {
3628 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3629 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3630
3631 /* The new PLT is a loaded section. */
3632 if (htab->plt != NULL
3633 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3634 return -1;
3635
3636 /* The new GOT is not executable. */
3637 if (htab->got != NULL
3638 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3639 return -1;
3640 }
3641 else
3642 {
3643 /* Stop an unused .glink section from affecting .text alignment. */
3644 if (htab->glink != NULL
3645 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3646 return -1;
3647 }
3648 return htab->plt_type == PLT_NEW;
3649 }
3650 \f
3651 /* Return the section that should be marked against GC for a given
3652 relocation. */
3653
3654 static asection *
3655 ppc_elf_gc_mark_hook (asection *sec,
3656 struct bfd_link_info *info,
3657 Elf_Internal_Rela *rel,
3658 struct elf_link_hash_entry *h,
3659 Elf_Internal_Sym *sym)
3660 {
3661 if (h != NULL)
3662 switch (ELF32_R_TYPE (rel->r_info))
3663 {
3664 case R_PPC_GNU_VTINHERIT:
3665 case R_PPC_GNU_VTENTRY:
3666 return NULL;
3667 }
3668
3669 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3670 }
3671
3672 /* Update the got, plt and dynamic reloc reference counts for the
3673 section being removed. */
3674
3675 static bfd_boolean
3676 ppc_elf_gc_sweep_hook (bfd *abfd,
3677 struct bfd_link_info *info,
3678 asection *sec,
3679 const Elf_Internal_Rela *relocs)
3680 {
3681 struct ppc_elf_link_hash_table *htab;
3682 Elf_Internal_Shdr *symtab_hdr;
3683 struct elf_link_hash_entry **sym_hashes;
3684 bfd_signed_vma *local_got_refcounts;
3685 const Elf_Internal_Rela *rel, *relend;
3686 asection *got2;
3687
3688 if ((sec->flags & SEC_ALLOC) == 0)
3689 return TRUE;
3690
3691 elf_section_data (sec)->local_dynrel = NULL;
3692
3693 htab = ppc_elf_hash_table (info);
3694 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3695 sym_hashes = elf_sym_hashes (abfd);
3696 local_got_refcounts = elf_local_got_refcounts (abfd);
3697 got2 = bfd_get_section_by_name (abfd, ".got2");
3698
3699 relend = relocs + sec->reloc_count;
3700 for (rel = relocs; rel < relend; rel++)
3701 {
3702 unsigned long r_symndx;
3703 enum elf_ppc_reloc_type r_type;
3704 struct elf_link_hash_entry *h = NULL;
3705
3706 r_symndx = ELF32_R_SYM (rel->r_info);
3707 if (r_symndx >= symtab_hdr->sh_info)
3708 {
3709 struct ppc_elf_dyn_relocs **pp, *p;
3710 struct ppc_elf_link_hash_entry *eh;
3711
3712 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3713 while (h->root.type == bfd_link_hash_indirect
3714 || h->root.type == bfd_link_hash_warning)
3715 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3716 eh = (struct ppc_elf_link_hash_entry *) h;
3717
3718 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3719 if (p->sec == sec)
3720 {
3721 /* Everything must go for SEC. */
3722 *pp = p->next;
3723 break;
3724 }
3725 }
3726
3727 r_type = ELF32_R_TYPE (rel->r_info);
3728 switch (r_type)
3729 {
3730 case R_PPC_GOT_TLSLD16:
3731 case R_PPC_GOT_TLSLD16_LO:
3732 case R_PPC_GOT_TLSLD16_HI:
3733 case R_PPC_GOT_TLSLD16_HA:
3734 htab->tlsld_got.refcount -= 1;
3735 /* Fall thru */
3736
3737 case R_PPC_GOT_TLSGD16:
3738 case R_PPC_GOT_TLSGD16_LO:
3739 case R_PPC_GOT_TLSGD16_HI:
3740 case R_PPC_GOT_TLSGD16_HA:
3741 case R_PPC_GOT_TPREL16:
3742 case R_PPC_GOT_TPREL16_LO:
3743 case R_PPC_GOT_TPREL16_HI:
3744 case R_PPC_GOT_TPREL16_HA:
3745 case R_PPC_GOT_DTPREL16:
3746 case R_PPC_GOT_DTPREL16_LO:
3747 case R_PPC_GOT_DTPREL16_HI:
3748 case R_PPC_GOT_DTPREL16_HA:
3749 case R_PPC_GOT16:
3750 case R_PPC_GOT16_LO:
3751 case R_PPC_GOT16_HI:
3752 case R_PPC_GOT16_HA:
3753 if (h != NULL)
3754 {
3755 if (h->got.refcount > 0)
3756 h->got.refcount--;
3757 }
3758 else if (local_got_refcounts != NULL)
3759 {
3760 if (local_got_refcounts[r_symndx] > 0)
3761 local_got_refcounts[r_symndx]--;
3762 }
3763 break;
3764
3765 case R_PPC_REL24:
3766 case R_PPC_REL14:
3767 case R_PPC_REL14_BRTAKEN:
3768 case R_PPC_REL14_BRNTAKEN:
3769 case R_PPC_REL32:
3770 if (h == NULL || h == htab->elf.hgot)
3771 break;
3772 /* Fall thru */
3773
3774 case R_PPC_ADDR32:
3775 case R_PPC_ADDR24:
3776 case R_PPC_ADDR16:
3777 case R_PPC_ADDR16_LO:
3778 case R_PPC_ADDR16_HI:
3779 case R_PPC_ADDR16_HA:
3780 case R_PPC_ADDR14:
3781 case R_PPC_ADDR14_BRTAKEN:
3782 case R_PPC_ADDR14_BRNTAKEN:
3783 case R_PPC_UADDR32:
3784 case R_PPC_UADDR16:
3785 if (info->shared)
3786 break;
3787
3788 case R_PPC_PLT32:
3789 case R_PPC_PLTREL24:
3790 case R_PPC_PLTREL32:
3791 case R_PPC_PLT16_LO:
3792 case R_PPC_PLT16_HI:
3793 case R_PPC_PLT16_HA:
3794 if (h != NULL)
3795 {
3796 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3797 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3798 if (ent->plt.refcount > 0)
3799 ent->plt.refcount -= 1;
3800 }
3801 break;
3802
3803 default:
3804 break;
3805 }
3806 }
3807 return TRUE;
3808 }
3809 \f
3810 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3811
3812 asection *
3813 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3814 {
3815 struct ppc_elf_link_hash_table *htab;
3816
3817 htab = ppc_elf_hash_table (info);
3818 if (htab->plt_type == PLT_NEW
3819 && htab->plt != NULL
3820 && htab->plt->output_section != NULL)
3821 {
3822 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3823 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3824 }
3825
3826 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3827 FALSE, FALSE, TRUE);
3828 return _bfd_elf_tls_setup (obfd, info);
3829 }
3830
3831 /* Run through all the TLS relocs looking for optimization
3832 opportunities. */
3833
3834 bfd_boolean
3835 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3836 struct bfd_link_info *info)
3837 {
3838 bfd *ibfd;
3839 asection *sec;
3840 struct ppc_elf_link_hash_table *htab;
3841
3842 if (info->relocatable || info->shared)
3843 return TRUE;
3844
3845 htab = ppc_elf_hash_table (info);
3846 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3847 {
3848 Elf_Internal_Sym *locsyms = NULL;
3849 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3850
3851 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3852 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3853 {
3854 Elf_Internal_Rela *relstart, *rel, *relend;
3855 int expecting_tls_get_addr;
3856
3857 /* Read the relocations. */
3858 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3859 info->keep_memory);
3860 if (relstart == NULL)
3861 return FALSE;
3862
3863 expecting_tls_get_addr = 0;
3864 relend = relstart + sec->reloc_count;
3865 for (rel = relstart; rel < relend; rel++)
3866 {
3867 enum elf_ppc_reloc_type r_type;
3868 unsigned long r_symndx;
3869 struct elf_link_hash_entry *h = NULL;
3870 char *tls_mask;
3871 char tls_set, tls_clear;
3872 bfd_boolean is_local;
3873
3874 r_symndx = ELF32_R_SYM (rel->r_info);
3875 if (r_symndx >= symtab_hdr->sh_info)
3876 {
3877 struct elf_link_hash_entry **sym_hashes;
3878
3879 sym_hashes = elf_sym_hashes (ibfd);
3880 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3881 while (h->root.type == bfd_link_hash_indirect
3882 || h->root.type == bfd_link_hash_warning)
3883 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3884 }
3885
3886 is_local = FALSE;
3887 if (h == NULL
3888 || !h->def_dynamic)
3889 is_local = TRUE;
3890
3891 r_type = ELF32_R_TYPE (rel->r_info);
3892 switch (r_type)
3893 {
3894 case R_PPC_GOT_TLSLD16:
3895 case R_PPC_GOT_TLSLD16_LO:
3896 case R_PPC_GOT_TLSLD16_HI:
3897 case R_PPC_GOT_TLSLD16_HA:
3898 /* These relocs should never be against a symbol
3899 defined in a shared lib. Leave them alone if
3900 that turns out to be the case. */
3901 expecting_tls_get_addr = 0;
3902 htab->tlsld_got.refcount -= 1;
3903 if (!is_local)
3904 continue;
3905
3906 /* LD -> LE */
3907 tls_set = 0;
3908 tls_clear = TLS_LD;
3909 expecting_tls_get_addr = 1;
3910 break;
3911
3912 case R_PPC_GOT_TLSGD16:
3913 case R_PPC_GOT_TLSGD16_LO:
3914 case R_PPC_GOT_TLSGD16_HI:
3915 case R_PPC_GOT_TLSGD16_HA:
3916 if (is_local)
3917 /* GD -> LE */
3918 tls_set = 0;
3919 else
3920 /* GD -> IE */
3921 tls_set = TLS_TLS | TLS_TPRELGD;
3922 tls_clear = TLS_GD;
3923 expecting_tls_get_addr = 1;
3924 break;
3925
3926 case R_PPC_GOT_TPREL16:
3927 case R_PPC_GOT_TPREL16_LO:
3928 case R_PPC_GOT_TPREL16_HI:
3929 case R_PPC_GOT_TPREL16_HA:
3930 expecting_tls_get_addr = 0;
3931 if (is_local)
3932 {
3933 /* IE -> LE */
3934 tls_set = 0;
3935 tls_clear = TLS_TPREL;
3936 break;
3937 }
3938 else
3939 continue;
3940
3941 case R_PPC_REL14:
3942 case R_PPC_REL14_BRTAKEN:
3943 case R_PPC_REL14_BRNTAKEN:
3944 case R_PPC_REL24:
3945 if (expecting_tls_get_addr
3946 && h != NULL
3947 && h == htab->tls_get_addr)
3948 {
3949 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3950 if (ent != NULL && ent->plt.refcount > 0)
3951 ent->plt.refcount -= 1;
3952 }
3953 expecting_tls_get_addr = 0;
3954 continue;
3955
3956 default:
3957 expecting_tls_get_addr = 0;
3958 continue;
3959 }
3960
3961 if (h != NULL)
3962 {
3963 if (tls_set == 0)
3964 {
3965 /* We managed to get rid of a got entry. */
3966 if (h->got.refcount > 0)
3967 h->got.refcount -= 1;
3968 }
3969 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3970 }
3971 else
3972 {
3973 Elf_Internal_Sym *sym;
3974 bfd_signed_vma *lgot_refs;
3975 char *lgot_masks;
3976
3977 if (locsyms == NULL)
3978 {
3979 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3980 if (locsyms == NULL)
3981 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3982 symtab_hdr->sh_info,
3983 0, NULL, NULL, NULL);
3984 if (locsyms == NULL)
3985 {
3986 if (elf_section_data (sec)->relocs != relstart)
3987 free (relstart);
3988 return FALSE;
3989 }
3990 }
3991 sym = locsyms + r_symndx;
3992 lgot_refs = elf_local_got_refcounts (ibfd);
3993 if (lgot_refs == NULL)
3994 abort ();
3995 if (tls_set == 0)
3996 {
3997 /* We managed to get rid of a got entry. */
3998 if (lgot_refs[r_symndx] > 0)
3999 lgot_refs[r_symndx] -= 1;
4000 }
4001 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4002 tls_mask = &lgot_masks[r_symndx];
4003 }
4004
4005 *tls_mask |= tls_set;
4006 *tls_mask &= ~tls_clear;
4007 }
4008
4009 if (elf_section_data (sec)->relocs != relstart)
4010 free (relstart);
4011 }
4012
4013 if (locsyms != NULL
4014 && (symtab_hdr->contents != (unsigned char *) locsyms))
4015 {
4016 if (!info->keep_memory)
4017 free (locsyms);
4018 else
4019 symtab_hdr->contents = (unsigned char *) locsyms;
4020 }
4021 }
4022 return TRUE;
4023 }
4024 \f
4025 /* Adjust a symbol defined by a dynamic object and referenced by a
4026 regular object. The current definition is in some section of the
4027 dynamic object, but we're not including those sections. We have to
4028 change the definition to something the rest of the link can
4029 understand. */
4030
4031 static bfd_boolean
4032 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4033 struct elf_link_hash_entry *h)
4034 {
4035 struct ppc_elf_link_hash_table *htab;
4036 asection *s;
4037 unsigned int power_of_two;
4038
4039 #ifdef DEBUG
4040 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4041 h->root.root.string);
4042 #endif
4043
4044 /* Make sure we know what is going on here. */
4045 htab = ppc_elf_hash_table (info);
4046 BFD_ASSERT (htab->elf.dynobj != NULL
4047 && (h->needs_plt
4048 || h->u.weakdef != NULL
4049 || (h->def_dynamic
4050 && h->ref_regular
4051 && !h->def_regular)));
4052
4053 /* Deal with function syms. */
4054 if (h->type == STT_FUNC
4055 || h->needs_plt)
4056 {
4057 /* Clear procedure linkage table information for any symbol that
4058 won't need a .plt entry. */
4059 struct plt_entry *ent;
4060 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4061 if (ent->plt.refcount > 0)
4062 break;
4063 if (ent == NULL
4064 || SYMBOL_CALLS_LOCAL (info, h)
4065 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4066 && h->root.type == bfd_link_hash_undefweak))
4067 {
4068 /* A PLT entry is not required/allowed when:
4069
4070 1. We are not using ld.so; because then the PLT entry
4071 can't be set up, so we can't use one. In this case,
4072 ppc_elf_adjust_dynamic_symbol won't even be called.
4073
4074 2. GC has rendered the entry unused.
4075
4076 3. We know for certain that a call to this symbol
4077 will go to this object, or will remain undefined. */
4078 h->plt.plist = NULL;
4079 h->needs_plt = 0;
4080 }
4081 return TRUE;
4082 }
4083 else
4084 h->plt.plist = NULL;
4085
4086 /* If this is a weak symbol, and there is a real definition, the
4087 processor independent code will have arranged for us to see the
4088 real definition first, and we can just use the same value. */
4089 if (h->u.weakdef != NULL)
4090 {
4091 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4092 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4093 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4094 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4095 if (ELIMINATE_COPY_RELOCS)
4096 h->non_got_ref = h->u.weakdef->non_got_ref;
4097 return TRUE;
4098 }
4099
4100 /* This is a reference to a symbol defined by a dynamic object which
4101 is not a function. */
4102
4103 /* If we are creating a shared library, we must presume that the
4104 only references to the symbol are via the global offset table.
4105 For such cases we need not do anything here; the relocations will
4106 be handled correctly by relocate_section. */
4107 if (info->shared)
4108 return TRUE;
4109
4110 /* If there are no references to this symbol that do not use the
4111 GOT, we don't need to generate a copy reloc. */
4112 if (!h->non_got_ref)
4113 return TRUE;
4114
4115 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4116 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4117 do this if there are any small data relocations. */
4118 if (ELIMINATE_COPY_RELOCS
4119 && !ppc_elf_hash_entry (h)->has_sda_refs)
4120 {
4121 struct ppc_elf_dyn_relocs *p;
4122 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4123 {
4124 s = p->sec->output_section;
4125 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4126 break;
4127 }
4128
4129 if (p == NULL)
4130 {
4131 h->non_got_ref = 0;
4132 return TRUE;
4133 }
4134 }
4135
4136 if (h->size == 0)
4137 {
4138 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4139 h->root.root.string);
4140 return TRUE;
4141 }
4142
4143 /* We must allocate the symbol in our .dynbss section, which will
4144 become part of the .bss section of the executable. There will be
4145 an entry for this symbol in the .dynsym section. The dynamic
4146 object will contain position independent code, so all references
4147 from the dynamic object to this symbol will go through the global
4148 offset table. The dynamic linker will use the .dynsym entry to
4149 determine the address it must put in the global offset table, so
4150 both the dynamic object and the regular object will refer to the
4151 same memory location for the variable.
4152
4153 Of course, if the symbol is referenced using SDAREL relocs, we
4154 must instead allocate it in .sbss. */
4155
4156 if (ppc_elf_hash_entry (h)->has_sda_refs)
4157 s = htab->dynsbss;
4158 else
4159 s = htab->dynbss;
4160 BFD_ASSERT (s != NULL);
4161
4162 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4163 copy the initial value out of the dynamic object and into the
4164 runtime process image. We need to remember the offset into the
4165 .rela.bss section we are going to use. */
4166 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4167 {
4168 asection *srel;
4169
4170 if (ppc_elf_hash_entry (h)->has_sda_refs)
4171 srel = htab->relsbss;
4172 else
4173 srel = htab->relbss;
4174 BFD_ASSERT (srel != NULL);
4175 srel->size += sizeof (Elf32_External_Rela);
4176 h->needs_copy = 1;
4177 }
4178
4179 /* We need to figure out the alignment required for this symbol. I
4180 have no idea how ELF linkers handle this. */
4181 power_of_two = bfd_log2 (h->size);
4182 if (power_of_two > 4)
4183 power_of_two = 4;
4184
4185 /* Apply the required alignment. */
4186 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4187 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4188 {
4189 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4190 return FALSE;
4191 }
4192
4193 /* Define the symbol as being at this point in the section. */
4194 h->root.u.def.section = s;
4195 h->root.u.def.value = s->size;
4196
4197 /* Increment the section size to make room for the symbol. */
4198 s->size += h->size;
4199
4200 return TRUE;
4201 }
4202 \f
4203 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4204 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4205 specifying the addend on the plt relocation. For -fpic code, the sym
4206 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4207 xxxxxxxx.got2.plt_pic32.<callee>. */
4208
4209 static bfd_boolean
4210 add_stub_sym (struct plt_entry *ent,
4211 struct elf_link_hash_entry *h,
4212 struct bfd_link_info *info)
4213 {
4214 struct elf_link_hash_entry *sh;
4215 size_t len1, len2, len3;
4216 char *name;
4217 const char *stub;
4218 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4219
4220 if (info->shared || info->pie)
4221 stub = ".plt_pic32.";
4222 else
4223 stub = ".plt_call32.";
4224
4225 len1 = strlen (h->root.root.string);
4226 len2 = strlen (stub);
4227 len3 = 0;
4228 if (ent->sec)
4229 len3 = strlen (ent->sec->name);
4230 name = bfd_malloc (len1 + len2 + len3 + 9);
4231 if (name == NULL)
4232 return FALSE;
4233 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4234 if (ent->sec)
4235 memcpy (name + 8, ent->sec->name, len3);
4236 memcpy (name + 8 + len3, stub, len2);
4237 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4238 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4239 if (sh == NULL)
4240 return FALSE;
4241 if (sh->root.type == bfd_link_hash_new)
4242 {
4243 sh->root.type = bfd_link_hash_defined;
4244 sh->root.u.def.section = htab->glink;
4245 sh->root.u.def.value = ent->glink_offset;
4246 sh->ref_regular = 1;
4247 sh->def_regular = 1;
4248 sh->ref_regular_nonweak = 1;
4249 sh->forced_local = 1;
4250 sh->non_elf = 0;
4251 }
4252 return TRUE;
4253 }
4254
4255 /* Allocate NEED contiguous space in .got, and return the offset.
4256 Handles allocation of the got header when crossing 32k. */
4257
4258 static bfd_vma
4259 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4260 {
4261 bfd_vma where;
4262 unsigned int max_before_header;
4263
4264 if (htab->plt_type == PLT_VXWORKS)
4265 {
4266 where = htab->got->size;
4267 htab->got->size += need;
4268 }
4269 else
4270 {
4271 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4272 if (need <= htab->got_gap)
4273 {
4274 where = max_before_header - htab->got_gap;
4275 htab->got_gap -= need;
4276 }
4277 else
4278 {
4279 if (htab->got->size + need > max_before_header
4280 && htab->got->size <= max_before_header)
4281 {
4282 htab->got_gap = max_before_header - htab->got->size;
4283 htab->got->size = max_before_header + htab->got_header_size;
4284 }
4285 where = htab->got->size;
4286 htab->got->size += need;
4287 }
4288 }
4289 return where;
4290 }
4291
4292 /* Allocate space in associated reloc sections for dynamic relocs. */
4293
4294 static bfd_boolean
4295 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4296 {
4297 struct bfd_link_info *info = inf;
4298 struct ppc_elf_link_hash_entry *eh;
4299 struct ppc_elf_link_hash_table *htab;
4300 struct ppc_elf_dyn_relocs *p;
4301
4302 if (h->root.type == bfd_link_hash_indirect)
4303 return TRUE;
4304
4305 if (h->root.type == bfd_link_hash_warning)
4306 /* When warning symbols are created, they **replace** the "real"
4307 entry in the hash table, thus we never get to see the real
4308 symbol in a hash traversal. So look at it now. */
4309 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4310
4311 htab = ppc_elf_hash_table (info);
4312 if (htab->elf.dynamic_sections_created)
4313 {
4314 struct plt_entry *ent;
4315 bfd_boolean doneone = FALSE;
4316 bfd_vma plt_offset = 0, glink_offset = 0;
4317
4318 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4319 if (ent->plt.refcount > 0)
4320 {
4321 /* Make sure this symbol is output as a dynamic symbol. */
4322 if (h->dynindx == -1
4323 && !h->forced_local)
4324 {
4325 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4326 return FALSE;
4327 }
4328
4329 if (info->shared
4330 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4331 {
4332 asection *s = htab->plt;
4333
4334 if (htab->plt_type == PLT_NEW)
4335 {
4336 if (!doneone)
4337 {
4338 plt_offset = s->size;
4339 s->size += 4;
4340 }
4341 ent->plt.offset = plt_offset;
4342
4343 s = htab->glink;
4344 if (!doneone || info->shared || info->pie)
4345 {
4346 glink_offset = s->size;
4347 s->size += GLINK_ENTRY_SIZE;
4348 }
4349 if (!doneone
4350 && !info->shared
4351 && !h->def_regular)
4352 {
4353 h->root.u.def.section = s;
4354 h->root.u.def.value = glink_offset;
4355 }
4356 ent->glink_offset = glink_offset;
4357
4358 if (htab->emit_stub_syms
4359 && !add_stub_sym (ent, h, info))
4360 return FALSE;
4361 }
4362 else
4363 {
4364 if (!doneone)
4365 {
4366 /* If this is the first .plt entry, make room
4367 for the special first entry. */
4368 if (s->size == 0)
4369 s->size += htab->plt_initial_entry_size;
4370
4371 /* The PowerPC PLT is actually composed of two
4372 parts, the first part is 2 words (for a load
4373 and a jump), and then there is a remaining
4374 word available at the end. */
4375 plt_offset = (htab->plt_initial_entry_size
4376 + (htab->plt_slot_size
4377 * ((s->size
4378 - htab->plt_initial_entry_size)
4379 / htab->plt_entry_size)));
4380
4381 /* If this symbol is not defined in a regular
4382 file, and we are not generating a shared
4383 library, then set the symbol to this location
4384 in the .plt. This is required to make
4385 function pointers compare as equal between
4386 the normal executable and the shared library. */
4387 if (! info->shared
4388 && !h->def_regular)
4389 {
4390 h->root.u.def.section = s;
4391 h->root.u.def.value = plt_offset;
4392 }
4393
4394 /* Make room for this entry. */
4395 s->size += htab->plt_entry_size;
4396 /* After the 8192nd entry, room for two entries
4397 is allocated. */
4398 if (htab->plt_type == PLT_OLD
4399 && (s->size - htab->plt_initial_entry_size)
4400 / htab->plt_entry_size
4401 > PLT_NUM_SINGLE_ENTRIES)
4402 s->size += htab->plt_entry_size;
4403 }
4404 ent->plt.offset = plt_offset;
4405 }
4406
4407 /* We also need to make an entry in the .rela.plt section. */
4408 if (!doneone)
4409 {
4410 htab->relplt->size += sizeof (Elf32_External_Rela);
4411
4412 if (htab->plt_type == PLT_VXWORKS)
4413 {
4414 /* Allocate space for the unloaded relocations. */
4415 if (!info->shared)
4416 {
4417 if (ent->plt.offset
4418 == (bfd_vma) htab->plt_initial_entry_size)
4419 {
4420 htab->srelplt2->size
4421 += sizeof (Elf32_External_Rela)
4422 * VXWORKS_PLTRESOLVE_RELOCS;
4423 }
4424
4425 htab->srelplt2->size
4426 += sizeof (Elf32_External_Rela)
4427 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4428 }
4429
4430 /* Every PLT entry has an associated GOT entry in
4431 .got.plt. */
4432 htab->sgotplt->size += 4;
4433 }
4434 doneone = TRUE;
4435 }
4436 }
4437 else
4438 ent->plt.offset = (bfd_vma) -1;
4439
4440 if (!doneone)
4441 {
4442 h->plt.plist = NULL;
4443 h->needs_plt = 0;
4444 }
4445 }
4446 }
4447 else
4448 {
4449 h->plt.plist = NULL;
4450 h->needs_plt = 0;
4451 }
4452
4453 eh = (struct ppc_elf_link_hash_entry *) h;
4454 if (eh->elf.got.refcount > 0)
4455 {
4456 /* Make sure this symbol is output as a dynamic symbol. */
4457 if (eh->elf.dynindx == -1
4458 && !eh->elf.forced_local)
4459 {
4460 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4461 return FALSE;
4462 }
4463
4464 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4465 && !eh->elf.def_dynamic)
4466 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4467 eh->elf.got.offset = (bfd_vma) -1;
4468 else
4469 {
4470 bfd_boolean dyn;
4471 unsigned int need = 0;
4472 if ((eh->tls_mask & TLS_TLS) != 0)
4473 {
4474 if ((eh->tls_mask & TLS_LD) != 0)
4475 need += 8;
4476 if ((eh->tls_mask & TLS_GD) != 0)
4477 need += 8;
4478 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4479 need += 4;
4480 if ((eh->tls_mask & TLS_DTPREL) != 0)
4481 need += 4;
4482 }
4483 else
4484 need += 4;
4485 eh->elf.got.offset = allocate_got (htab, need);
4486 dyn = htab->elf.dynamic_sections_created;
4487 if ((info->shared
4488 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4489 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4490 || eh->elf.root.type != bfd_link_hash_undefweak))
4491 {
4492 /* All the entries we allocated need relocs.
4493 Except LD only needs one. */
4494 if ((eh->tls_mask & TLS_LD) != 0)
4495 need -= 4;
4496 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4497 }
4498 }
4499 }
4500 else
4501 eh->elf.got.offset = (bfd_vma) -1;
4502
4503 if (eh->dyn_relocs == NULL)
4504 return TRUE;
4505
4506 /* In the shared -Bsymbolic case, discard space allocated for
4507 dynamic pc-relative relocs against symbols which turn out to be
4508 defined in regular objects. For the normal shared case, discard
4509 space for relocs that have become local due to symbol visibility
4510 changes. */
4511
4512 if (info->shared)
4513 {
4514 /* Relocs that use pc_count are those that appear on a call insn,
4515 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4516 generated via assembly. We want calls to protected symbols to
4517 resolve directly to the function rather than going via the plt.
4518 If people want function pointer comparisons to work as expected
4519 then they should avoid writing weird assembly. */
4520 if (SYMBOL_CALLS_LOCAL (info, h))
4521 {
4522 struct ppc_elf_dyn_relocs **pp;
4523
4524 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4525 {
4526 p->count -= p->pc_count;
4527 p->pc_count = 0;
4528 if (p->count == 0)
4529 *pp = p->next;
4530 else
4531 pp = &p->next;
4532 }
4533 }
4534
4535 /* Also discard relocs on undefined weak syms with non-default
4536 visibility. */
4537 if (eh->dyn_relocs != NULL
4538 && h->root.type == bfd_link_hash_undefweak)
4539 {
4540 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4541 eh->dyn_relocs = NULL;
4542
4543 /* Make sure undefined weak symbols are output as a dynamic
4544 symbol in PIEs. */
4545 else if (h->dynindx == -1
4546 && !h->forced_local)
4547 {
4548 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4549 return FALSE;
4550 }
4551 }
4552 }
4553 else if (ELIMINATE_COPY_RELOCS)
4554 {
4555 /* For the non-shared case, discard space for relocs against
4556 symbols which turn out to need copy relocs or are not
4557 dynamic. */
4558
4559 if (!h->non_got_ref
4560 && h->def_dynamic
4561 && !h->def_regular)
4562 {
4563 /* Make sure this symbol is output as a dynamic symbol.
4564 Undefined weak syms won't yet be marked as dynamic. */
4565 if (h->dynindx == -1
4566 && !h->forced_local)
4567 {
4568 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4569 return FALSE;
4570 }
4571
4572 /* If that succeeded, we know we'll be keeping all the
4573 relocs. */
4574 if (h->dynindx != -1)
4575 goto keep;
4576 }
4577
4578 eh->dyn_relocs = NULL;
4579
4580 keep: ;
4581 }
4582
4583 /* Finally, allocate space. */
4584 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4585 {
4586 asection *sreloc = elf_section_data (p->sec)->sreloc;
4587 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4588 }
4589
4590 return TRUE;
4591 }
4592
4593 /* Find any dynamic relocs that apply to read-only sections. */
4594
4595 static bfd_boolean
4596 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4597 {
4598 struct ppc_elf_dyn_relocs *p;
4599
4600 if (h->root.type == bfd_link_hash_indirect)
4601 return TRUE;
4602
4603 if (h->root.type == bfd_link_hash_warning)
4604 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4605
4606 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4607 {
4608 asection *s = p->sec->output_section;
4609
4610 if (s != NULL
4611 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4612 == (SEC_READONLY | SEC_ALLOC)))
4613 {
4614 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4615
4616 /* Not an error, just cut short the traversal. */
4617 return FALSE;
4618 }
4619 }
4620 return TRUE;
4621 }
4622
4623 /* Set the sizes of the dynamic sections. */
4624
4625 static bfd_boolean
4626 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4627 struct bfd_link_info *info)
4628 {
4629 struct ppc_elf_link_hash_table *htab;
4630 asection *s;
4631 bfd_boolean relocs;
4632 bfd *ibfd;
4633
4634 #ifdef DEBUG
4635 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4636 #endif
4637
4638 htab = ppc_elf_hash_table (info);
4639 BFD_ASSERT (htab->elf.dynobj != NULL);
4640
4641 if (elf_hash_table (info)->dynamic_sections_created)
4642 {
4643 /* Set the contents of the .interp section to the interpreter. */
4644 if (info->executable)
4645 {
4646 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4647 BFD_ASSERT (s != NULL);
4648 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4649 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4650 }
4651 }
4652
4653 if (htab->plt_type == PLT_OLD)
4654 htab->got_header_size = 16;
4655 else if (htab->plt_type == PLT_NEW)
4656 htab->got_header_size = 12;
4657
4658 /* Set up .got offsets for local syms, and space for local dynamic
4659 relocs. */
4660 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4661 {
4662 bfd_signed_vma *local_got;
4663 bfd_signed_vma *end_local_got;
4664 char *lgot_masks;
4665 bfd_size_type locsymcount;
4666 Elf_Internal_Shdr *symtab_hdr;
4667
4668 if (!is_ppc_elf_target (ibfd->xvec))
4669 continue;
4670
4671 for (s = ibfd->sections; s != NULL; s = s->next)
4672 {
4673 struct ppc_elf_dyn_relocs *p;
4674
4675 for (p = ((struct ppc_elf_dyn_relocs *)
4676 elf_section_data (s)->local_dynrel);
4677 p != NULL;
4678 p = p->next)
4679 {
4680 if (!bfd_is_abs_section (p->sec)
4681 && bfd_is_abs_section (p->sec->output_section))
4682 {
4683 /* Input section has been discarded, either because
4684 it is a copy of a linkonce section or due to
4685 linker script /DISCARD/, so we'll be discarding
4686 the relocs too. */
4687 }
4688 else if (p->count != 0)
4689 {
4690 elf_section_data (p->sec)->sreloc->size
4691 += p->count * sizeof (Elf32_External_Rela);
4692 if ((p->sec->output_section->flags
4693 & (SEC_READONLY | SEC_ALLOC))
4694 == (SEC_READONLY | SEC_ALLOC))
4695 info->flags |= DF_TEXTREL;
4696 }
4697 }
4698 }
4699
4700 local_got = elf_local_got_refcounts (ibfd);
4701 if (!local_got)
4702 continue;
4703
4704 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4705 locsymcount = symtab_hdr->sh_info;
4706 end_local_got = local_got + locsymcount;
4707 lgot_masks = (char *) end_local_got;
4708 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4709 if (*local_got > 0)
4710 {
4711 if (*lgot_masks == (TLS_TLS | TLS_LD))
4712 {
4713 /* If just an LD reloc, we'll just use
4714 htab->tlsld_got.offset. */
4715 htab->tlsld_got.refcount += 1;
4716 *local_got = (bfd_vma) -1;
4717 }
4718 else
4719 {
4720 unsigned int need = 0;
4721 if ((*lgot_masks & TLS_TLS) != 0)
4722 {
4723 if ((*lgot_masks & TLS_GD) != 0)
4724 need += 8;
4725 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4726 need += 4;
4727 if ((*lgot_masks & TLS_DTPREL) != 0)
4728 need += 4;
4729 }
4730 else
4731 need += 4;
4732 *local_got = allocate_got (htab, need);
4733 if (info->shared)
4734 htab->relgot->size += (need
4735 * (sizeof (Elf32_External_Rela) / 4));
4736 }
4737 }
4738 else
4739 *local_got = (bfd_vma) -1;
4740 }
4741
4742 if (htab->tlsld_got.refcount > 0)
4743 {
4744 htab->tlsld_got.offset = allocate_got (htab, 8);
4745 if (info->shared)
4746 htab->relgot->size += sizeof (Elf32_External_Rela);
4747 }
4748 else
4749 htab->tlsld_got.offset = (bfd_vma) -1;
4750
4751 /* Allocate space for global sym dynamic relocs. */
4752 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4753
4754 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4755 {
4756 unsigned int g_o_t = 32768;
4757
4758 /* If we haven't allocated the header, do so now. When we get here,
4759 for old plt/got the got size will be 0 to 32764 (not allocated),
4760 or 32780 to 65536 (header allocated). For new plt/got, the
4761 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4762 if (htab->got->size <= 32768)
4763 {
4764 g_o_t = htab->got->size;
4765 if (htab->plt_type == PLT_OLD)
4766 g_o_t += 4;
4767 htab->got->size += htab->got_header_size;
4768 }
4769
4770 htab->elf.hgot->root.u.def.value = g_o_t;
4771 }
4772
4773 if (htab->glink != NULL && htab->glink->size != 0)
4774 {
4775 htab->glink_pltresolve = htab->glink->size;
4776 /* Space for the branch table. */
4777 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4778 /* Pad out to align the start of PLTresolve. */
4779 htab->glink->size += -htab->glink->size & 15;
4780 htab->glink->size += GLINK_PLTRESOLVE;
4781
4782 if (htab->emit_stub_syms)
4783 {
4784 struct elf_link_hash_entry *sh;
4785 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4786 TRUE, FALSE, FALSE);
4787 if (sh == NULL)
4788 return FALSE;
4789 if (sh->root.type == bfd_link_hash_new)
4790 {
4791 sh->root.type = bfd_link_hash_defined;
4792 sh->root.u.def.section = htab->glink;
4793 sh->root.u.def.value = htab->glink_pltresolve;
4794 sh->ref_regular = 1;
4795 sh->def_regular = 1;
4796 sh->ref_regular_nonweak = 1;
4797 sh->forced_local = 1;
4798 sh->non_elf = 0;
4799 }
4800 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4801 TRUE, FALSE, FALSE);
4802 if (sh == NULL)
4803 return FALSE;
4804 if (sh->root.type == bfd_link_hash_new)
4805 {
4806 sh->root.type = bfd_link_hash_defined;
4807 sh->root.u.def.section = htab->glink;
4808 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4809 sh->ref_regular = 1;
4810 sh->def_regular = 1;
4811 sh->ref_regular_nonweak = 1;
4812 sh->forced_local = 1;
4813 sh->non_elf = 0;
4814 }
4815 }
4816 }
4817
4818 /* We've now determined the sizes of the various dynamic sections.
4819 Allocate memory for them. */
4820 relocs = FALSE;
4821 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4822 {
4823 bfd_boolean strip_section = TRUE;
4824
4825 if ((s->flags & SEC_LINKER_CREATED) == 0)
4826 continue;
4827
4828 if (s == htab->plt
4829 || s == htab->glink
4830 || s == htab->got
4831 || s == htab->sgotplt
4832 || s == htab->sbss
4833 || s == htab->dynbss
4834 || s == htab->dynsbss)
4835 {
4836 /* We'd like to strip these sections if they aren't needed, but if
4837 we've exported dynamic symbols from them we must leave them.
4838 It's too late to tell BFD to get rid of the symbols. */
4839 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4840 strip_section = FALSE;
4841 /* Strip this section if we don't need it; see the
4842 comment below. */
4843 }
4844 else if (s == htab->sdata[0].section
4845 || s == htab->sdata[1].section)
4846 {
4847 /* Strip these too. */
4848 }
4849 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
4850 {
4851 if (s->size != 0)
4852 {
4853 /* Remember whether there are any relocation sections. */
4854 relocs = TRUE;
4855
4856 /* We use the reloc_count field as a counter if we need
4857 to copy relocs into the output file. */
4858 s->reloc_count = 0;
4859 }
4860 }
4861 else
4862 {
4863 /* It's not one of our sections, so don't allocate space. */
4864 continue;
4865 }
4866
4867 if (s->size == 0 && strip_section)
4868 {
4869 /* If we don't need this section, strip it from the
4870 output file. This is mostly to handle .rela.bss and
4871 .rela.plt. We must create both sections in
4872 create_dynamic_sections, because they must be created
4873 before the linker maps input sections to output
4874 sections. The linker does that before
4875 adjust_dynamic_symbol is called, and it is that
4876 function which decides whether anything needs to go
4877 into these sections. */
4878 s->flags |= SEC_EXCLUDE;
4879 continue;
4880 }
4881
4882 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4883 continue;
4884
4885 /* Allocate memory for the section contents. */
4886 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4887 if (s->contents == NULL)
4888 return FALSE;
4889 }
4890
4891 if (htab->elf.dynamic_sections_created)
4892 {
4893 /* Add some entries to the .dynamic section. We fill in the
4894 values later, in ppc_elf_finish_dynamic_sections, but we
4895 must add the entries now so that we get the correct size for
4896 the .dynamic section. The DT_DEBUG entry is filled in by the
4897 dynamic linker and used by the debugger. */
4898 #define add_dynamic_entry(TAG, VAL) \
4899 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4900
4901 if (info->executable)
4902 {
4903 if (!add_dynamic_entry (DT_DEBUG, 0))
4904 return FALSE;
4905 }
4906
4907 if (htab->plt != NULL && htab->plt->size != 0)
4908 {
4909 if (!add_dynamic_entry (DT_PLTGOT, 0)
4910 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4911 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4912 || !add_dynamic_entry (DT_JMPREL, 0))
4913 return FALSE;
4914 }
4915
4916 if (htab->glink != NULL && htab->glink->size != 0)
4917 {
4918 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4919 return FALSE;
4920 }
4921
4922 if (relocs)
4923 {
4924 if (!add_dynamic_entry (DT_RELA, 0)
4925 || !add_dynamic_entry (DT_RELASZ, 0)
4926 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4927 return FALSE;
4928 }
4929
4930 /* If any dynamic relocs apply to a read-only section, then we
4931 need a DT_TEXTREL entry. */
4932 if ((info->flags & DF_TEXTREL) == 0)
4933 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4934 info);
4935
4936 if ((info->flags & DF_TEXTREL) != 0)
4937 {
4938 if (!add_dynamic_entry (DT_TEXTREL, 0))
4939 return FALSE;
4940 }
4941 }
4942 #undef add_dynamic_entry
4943
4944 return TRUE;
4945 }
4946 \f
4947 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4948
4949 static const int shared_stub_entry[] =
4950 {
4951 0x7c0802a6, /* mflr 0 */
4952 0x429f0005, /* bcl 20, 31, .Lxxx */
4953 0x7d6802a6, /* mflr 11 */
4954 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4955 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4956 0x7c0803a6, /* mtlr 0 */
4957 0x7d6903a6, /* mtctr 11 */
4958 0x4e800420, /* bctr */
4959 };
4960
4961 static const int stub_entry[] =
4962 {
4963 0x3d600000, /* lis 11,xxx@ha */
4964 0x396b0000, /* addi 11,11,xxx@l */
4965 0x7d6903a6, /* mtctr 11 */
4966 0x4e800420, /* bctr */
4967 };
4968
4969 static bfd_boolean
4970 ppc_elf_relax_section (bfd *abfd,
4971 asection *isec,
4972 struct bfd_link_info *link_info,
4973 bfd_boolean *again)
4974 {
4975 struct one_fixup
4976 {
4977 struct one_fixup *next;
4978 asection *tsec;
4979 bfd_vma toff;
4980 bfd_vma trampoff;
4981 };
4982
4983 Elf_Internal_Shdr *symtab_hdr;
4984 bfd_byte *contents = NULL;
4985 Elf_Internal_Sym *isymbuf = NULL;
4986 Elf_Internal_Rela *internal_relocs = NULL;
4987 Elf_Internal_Rela *irel, *irelend;
4988 struct one_fixup *fixups = NULL;
4989 bfd_boolean changed;
4990 struct ppc_elf_link_hash_table *htab;
4991 bfd_size_type trampoff;
4992 asection *got2;
4993
4994 *again = FALSE;
4995
4996 /* Nothing to do if there are no relocations, and no need to do
4997 anything with non-alloc sections. */
4998 if ((isec->flags & SEC_ALLOC) == 0
4999 || (isec->flags & SEC_RELOC) == 0
5000 || isec->reloc_count == 0)
5001 return TRUE;
5002
5003 trampoff = (isec->size + 3) & (bfd_vma) -4;
5004 /* Space for a branch around any trampolines. */
5005 trampoff += 4;
5006
5007 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5008
5009 /* Get a copy of the native relocations. */
5010 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5011 link_info->keep_memory);
5012 if (internal_relocs == NULL)
5013 goto error_return;
5014
5015 htab = ppc_elf_hash_table (link_info);
5016 got2 = bfd_get_section_by_name (abfd, ".got2");
5017
5018 irelend = internal_relocs + isec->reloc_count;
5019 for (irel = internal_relocs; irel < irelend; irel++)
5020 {
5021 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5022 bfd_vma symaddr, reladdr, toff, roff;
5023 asection *tsec;
5024 struct one_fixup *f;
5025 size_t insn_offset = 0;
5026 bfd_vma max_branch_offset, val;
5027 bfd_byte *hit_addr;
5028 unsigned long t0;
5029 unsigned char sym_type;
5030
5031 switch (r_type)
5032 {
5033 case R_PPC_REL24:
5034 case R_PPC_LOCAL24PC:
5035 case R_PPC_PLTREL24:
5036 max_branch_offset = 1 << 25;
5037 break;
5038
5039 case R_PPC_REL14:
5040 case R_PPC_REL14_BRTAKEN:
5041 case R_PPC_REL14_BRNTAKEN:
5042 max_branch_offset = 1 << 15;
5043 break;
5044
5045 default:
5046 continue;
5047 }
5048
5049 /* Get the value of the symbol referred to by the reloc. */
5050 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5051 {
5052 /* A local symbol. */
5053 Elf_Internal_Sym *isym;
5054
5055 /* Read this BFD's local symbols. */
5056 if (isymbuf == NULL)
5057 {
5058 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5059 if (isymbuf == NULL)
5060 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5061 symtab_hdr->sh_info, 0,
5062 NULL, NULL, NULL);
5063 if (isymbuf == 0)
5064 goto error_return;
5065 }
5066 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5067 if (isym->st_shndx == SHN_UNDEF)
5068 continue; /* We can't do anything with undefined symbols. */
5069 else if (isym->st_shndx == SHN_ABS)
5070 tsec = bfd_abs_section_ptr;
5071 else if (isym->st_shndx == SHN_COMMON)
5072 tsec = bfd_com_section_ptr;
5073 else
5074 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5075
5076 toff = isym->st_value;
5077 sym_type = ELF_ST_TYPE (isym->st_info);
5078 }
5079 else
5080 {
5081 /* Global symbol handling. */
5082 unsigned long indx;
5083 struct elf_link_hash_entry *h;
5084
5085 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5086 h = elf_sym_hashes (abfd)[indx];
5087
5088 while (h->root.type == bfd_link_hash_indirect
5089 || h->root.type == bfd_link_hash_warning)
5090 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5091
5092 tsec = NULL;
5093 toff = 0;
5094 if (r_type == R_PPC_PLTREL24
5095 && htab->plt != NULL)
5096 {
5097 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5098
5099 if (ent != NULL)
5100 {
5101 if (htab->plt_type == PLT_NEW)
5102 {
5103 tsec = htab->glink;
5104 toff = ent->glink_offset;
5105 }
5106 else
5107 {
5108 tsec = htab->plt;
5109 toff = ent->plt.offset;
5110 }
5111 }
5112 }
5113 if (tsec != NULL)
5114 ;
5115 else if (h->root.type == bfd_link_hash_defined
5116 || h->root.type == bfd_link_hash_defweak)
5117 {
5118 tsec = h->root.u.def.section;
5119 toff = h->root.u.def.value;
5120 }
5121 else
5122 continue;
5123
5124 sym_type = h->type;
5125 }
5126
5127 /* If the branch and target are in the same section, you have
5128 no hope of adding stubs. We'll error out later should the
5129 branch overflow. */
5130 if (tsec == isec)
5131 continue;
5132
5133 /* There probably isn't any reason to handle symbols in
5134 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5135 attribute for a code section, and we are only looking at
5136 branches. However, implement it correctly here as a
5137 reference for other target relax_section functions. */
5138 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5139 {
5140 /* At this stage in linking, no SEC_MERGE symbol has been
5141 adjusted, so all references to such symbols need to be
5142 passed through _bfd_merged_section_offset. (Later, in
5143 relocate_section, all SEC_MERGE symbols *except* for
5144 section symbols have been adjusted.)
5145
5146 gas may reduce relocations against symbols in SEC_MERGE
5147 sections to a relocation against the section symbol when
5148 the original addend was zero. When the reloc is against
5149 a section symbol we should include the addend in the
5150 offset passed to _bfd_merged_section_offset, since the
5151 location of interest is the original symbol. On the
5152 other hand, an access to "sym+addend" where "sym" is not
5153 a section symbol should not include the addend; Such an
5154 access is presumed to be an offset from "sym"; The
5155 location of interest is just "sym". */
5156 if (sym_type == STT_SECTION)
5157 toff += irel->r_addend;
5158
5159 toff = _bfd_merged_section_offset (abfd, &tsec,
5160 elf_section_data (tsec)->sec_info,
5161 toff);
5162
5163 if (sym_type != STT_SECTION)
5164 toff += irel->r_addend;
5165 }
5166 /* PLTREL24 addends are special. */
5167 else if (r_type != R_PPC_PLTREL24)
5168 toff += irel->r_addend;
5169
5170 /* Attempted -shared link of non-pic code loses. */
5171 if (tsec->output_section == NULL)
5172 continue;
5173
5174 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5175
5176 roff = irel->r_offset;
5177 reladdr = isec->output_section->vma + isec->output_offset + roff;
5178
5179 /* If the branch is in range, no need to do anything. */
5180 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5181 continue;
5182
5183 /* Look for an existing fixup to this address. */
5184 for (f = fixups; f ; f = f->next)
5185 if (f->tsec == tsec && f->toff == toff)
5186 break;
5187
5188 if (f == NULL)
5189 {
5190 size_t size;
5191 unsigned long stub_rtype;
5192
5193 val = trampoff - roff;
5194 if (val >= max_branch_offset)
5195 /* Oh dear, we can't reach a trampoline. Don't try to add
5196 one. We'll report an error later. */
5197 continue;
5198
5199 if (link_info->shared)
5200 {
5201 size = 4 * ARRAY_SIZE (shared_stub_entry);
5202 insn_offset = 12;
5203 stub_rtype = R_PPC_RELAX32PC;
5204 }
5205 else
5206 {
5207 size = 4 * ARRAY_SIZE (stub_entry);
5208 insn_offset = 0;
5209 stub_rtype = R_PPC_RELAX32;
5210 }
5211
5212 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5213 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5214 abort ();
5215 if (tsec == htab->plt
5216 || tsec == htab->glink)
5217 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5218
5219 /* Hijack the old relocation. Since we need two
5220 relocations for this use a "composite" reloc. */
5221 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5222 stub_rtype);
5223 irel->r_offset = trampoff + insn_offset;
5224
5225 /* Record the fixup so we don't do it again this section. */
5226 f = bfd_malloc (sizeof (*f));
5227 f->next = fixups;
5228 f->tsec = tsec;
5229 f->toff = toff;
5230 f->trampoff = trampoff;
5231 fixups = f;
5232
5233 trampoff += size;
5234 }
5235 else
5236 {
5237 val = f->trampoff - roff;
5238 if (val >= max_branch_offset)
5239 continue;
5240
5241 /* Nop out the reloc, since we're finalizing things here. */
5242 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5243 }
5244
5245 /* Get the section contents. */
5246 if (contents == NULL)
5247 {
5248 /* Get cached copy if it exists. */
5249 if (elf_section_data (isec)->this_hdr.contents != NULL)
5250 contents = elf_section_data (isec)->this_hdr.contents;
5251 else
5252 {
5253 /* Go get them off disk. */
5254 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5255 goto error_return;
5256 }
5257 }
5258
5259 /* Fix up the existing branch to hit the trampoline. */
5260 hit_addr = contents + roff;
5261 switch (r_type)
5262 {
5263 case R_PPC_REL24:
5264 case R_PPC_LOCAL24PC:
5265 case R_PPC_PLTREL24:
5266 t0 = bfd_get_32 (abfd, hit_addr);
5267 t0 &= ~0x3fffffc;
5268 t0 |= val & 0x3fffffc;
5269 bfd_put_32 (abfd, t0, hit_addr);
5270 break;
5271
5272 case R_PPC_REL14:
5273 case R_PPC_REL14_BRTAKEN:
5274 case R_PPC_REL14_BRNTAKEN:
5275 t0 = bfd_get_32 (abfd, hit_addr);
5276 t0 &= ~0xfffc;
5277 t0 |= val & 0xfffc;
5278 bfd_put_32 (abfd, t0, hit_addr);
5279 break;
5280 }
5281 }
5282
5283 /* Write out the trampolines. */
5284 changed = fixups != NULL;
5285 if (fixups != NULL)
5286 {
5287 const int *stub;
5288 bfd_byte *dest;
5289 bfd_vma val;
5290 int i, size;
5291
5292 do
5293 {
5294 struct one_fixup *f = fixups;
5295 fixups = fixups->next;
5296 free (f);
5297 }
5298 while (fixups);
5299
5300 contents = bfd_realloc (contents, trampoff);
5301 if (contents == NULL)
5302 goto error_return;
5303
5304 isec->size = (isec->size + 3) & (bfd_vma) -4;
5305 /* Branch around the trampolines. */
5306 val = trampoff - isec->size + 0x48000000;
5307 dest = contents + isec->size;
5308 isec->size = trampoff;
5309 bfd_put_32 (abfd, val, dest);
5310 dest += 4;
5311
5312 if (link_info->shared)
5313 {
5314 stub = shared_stub_entry;
5315 size = ARRAY_SIZE (shared_stub_entry);
5316 }
5317 else
5318 {
5319 stub = stub_entry;
5320 size = ARRAY_SIZE (stub_entry);
5321 }
5322
5323 i = 0;
5324 while (dest < contents + trampoff)
5325 {
5326 bfd_put_32 (abfd, stub[i], dest);
5327 i++;
5328 if (i == size)
5329 i = 0;
5330 dest += 4;
5331 }
5332 BFD_ASSERT (i == 0);
5333 }
5334
5335 if (isymbuf != NULL
5336 && symtab_hdr->contents != (unsigned char *) isymbuf)
5337 {
5338 if (! link_info->keep_memory)
5339 free (isymbuf);
5340 else
5341 {
5342 /* Cache the symbols for elf_link_input_bfd. */
5343 symtab_hdr->contents = (unsigned char *) isymbuf;
5344 }
5345 }
5346
5347 if (contents != NULL
5348 && elf_section_data (isec)->this_hdr.contents != contents)
5349 {
5350 if (!changed && !link_info->keep_memory)
5351 free (contents);
5352 else
5353 {
5354 /* Cache the section contents for elf_link_input_bfd. */
5355 elf_section_data (isec)->this_hdr.contents = contents;
5356 }
5357 }
5358
5359 if (elf_section_data (isec)->relocs != internal_relocs)
5360 {
5361 if (!changed)
5362 free (internal_relocs);
5363 else
5364 elf_section_data (isec)->relocs = internal_relocs;
5365 }
5366
5367 *again = changed;
5368 return TRUE;
5369
5370 error_return:
5371 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5372 free (isymbuf);
5373 if (contents != NULL
5374 && elf_section_data (isec)->this_hdr.contents != contents)
5375 free (contents);
5376 if (internal_relocs != NULL
5377 && elf_section_data (isec)->relocs != internal_relocs)
5378 free (internal_relocs);
5379 return FALSE;
5380 }
5381 \f
5382 /* What to do when ld finds relocations against symbols defined in
5383 discarded sections. */
5384
5385 static unsigned int
5386 ppc_elf_action_discarded (asection *sec)
5387 {
5388 if (strcmp (".fixup", sec->name) == 0)
5389 return 0;
5390
5391 if (strcmp (".got2", sec->name) == 0)
5392 return 0;
5393
5394 return _bfd_elf_default_action_discarded (sec);
5395 }
5396 \f
5397 /* Fill in the address for a pointer generated in a linker section. */
5398
5399 static bfd_vma
5400 elf_finish_pointer_linker_section (bfd *input_bfd,
5401 elf_linker_section_t *lsect,
5402 struct elf_link_hash_entry *h,
5403 bfd_vma relocation,
5404 const Elf_Internal_Rela *rel)
5405 {
5406 elf_linker_section_pointers_t *linker_section_ptr;
5407
5408 BFD_ASSERT (lsect != NULL);
5409
5410 if (h != NULL)
5411 {
5412 /* Handle global symbol. */
5413 struct ppc_elf_link_hash_entry *eh;
5414
5415 eh = (struct ppc_elf_link_hash_entry *) h;
5416 BFD_ASSERT (eh->elf.def_regular);
5417 linker_section_ptr = eh->linker_section_pointer;
5418 }
5419 else
5420 {
5421 /* Handle local symbol. */
5422 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5423
5424 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5425 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5426 }
5427
5428 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5429 rel->r_addend,
5430 lsect);
5431 BFD_ASSERT (linker_section_ptr != NULL);
5432
5433 /* Offset will always be a multiple of four, so use the bottom bit
5434 as a "written" flag. */
5435 if ((linker_section_ptr->offset & 1) == 0)
5436 {
5437 bfd_put_32 (lsect->section->owner,
5438 relocation + linker_section_ptr->addend,
5439 lsect->section->contents + linker_section_ptr->offset);
5440 linker_section_ptr->offset += 1;
5441 }
5442
5443 relocation = (lsect->section->output_offset
5444 + linker_section_ptr->offset - 1
5445 - 0x8000);
5446
5447 #ifdef DEBUG
5448 fprintf (stderr,
5449 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5450 lsect->name, (long) relocation, (long) relocation);
5451 #endif
5452
5453 /* Subtract out the addend, because it will get added back in by the normal
5454 processing. */
5455 return relocation - linker_section_ptr->addend;
5456 }
5457
5458 /* The RELOCATE_SECTION function is called by the ELF backend linker
5459 to handle the relocations for a section.
5460
5461 The relocs are always passed as Rela structures; if the section
5462 actually uses Rel structures, the r_addend field will always be
5463 zero.
5464
5465 This function is responsible for adjust the section contents as
5466 necessary, and (if using Rela relocs and generating a
5467 relocatable output file) adjusting the reloc addend as
5468 necessary.
5469
5470 This function does not have to worry about setting the reloc
5471 address or the reloc symbol index.
5472
5473 LOCAL_SYMS is a pointer to the swapped in local symbols.
5474
5475 LOCAL_SECTIONS is an array giving the section in the input file
5476 corresponding to the st_shndx field of each local symbol.
5477
5478 The global hash table entry for the global symbols can be found
5479 via elf_sym_hashes (input_bfd).
5480
5481 When generating relocatable output, this function must handle
5482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5483 going to be the section symbol corresponding to the output
5484 section, which means that the addend must be adjusted
5485 accordingly. */
5486
5487 static bfd_boolean
5488 ppc_elf_relocate_section (bfd *output_bfd,
5489 struct bfd_link_info *info,
5490 bfd *input_bfd,
5491 asection *input_section,
5492 bfd_byte *contents,
5493 Elf_Internal_Rela *relocs,
5494 Elf_Internal_Sym *local_syms,
5495 asection **local_sections)
5496 {
5497 Elf_Internal_Shdr *symtab_hdr;
5498 struct elf_link_hash_entry **sym_hashes;
5499 struct ppc_elf_link_hash_table *htab;
5500 Elf_Internal_Rela *rel;
5501 Elf_Internal_Rela *relend;
5502 Elf_Internal_Rela outrel;
5503 bfd_byte *loc;
5504 asection *got2, *sreloc = NULL;
5505 bfd_vma *local_got_offsets;
5506 bfd_boolean ret = TRUE;
5507 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5508
5509 #ifdef DEBUG
5510 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5511 "%ld relocations%s",
5512 input_bfd, input_section,
5513 (long) input_section->reloc_count,
5514 (info->relocatable) ? " (relocatable)" : "");
5515 #endif
5516
5517 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5518
5519 if (info->relocatable)
5520 {
5521 if (got2 == NULL)
5522 return TRUE;
5523
5524 rel = relocs;
5525 relend = relocs + input_section->reloc_count;
5526 for (; rel < relend; rel++)
5527 {
5528 enum elf_ppc_reloc_type r_type;
5529
5530 r_type = ELF32_R_TYPE (rel->r_info);
5531 if (r_type == R_PPC_PLTREL24
5532 && rel->r_addend >= 32768)
5533 {
5534 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5535 addend specifies the GOT pointer offset within .got2. */
5536 rel->r_addend += got2->output_offset;
5537 }
5538 }
5539 return TRUE;
5540 }
5541
5542 /* Initialize howto table if not already done. */
5543 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5544 ppc_elf_howto_init ();
5545
5546 htab = ppc_elf_hash_table (info);
5547 local_got_offsets = elf_local_got_offsets (input_bfd);
5548 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5549 sym_hashes = elf_sym_hashes (input_bfd);
5550 rel = relocs;
5551 relend = relocs + input_section->reloc_count;
5552 for (; rel < relend; rel++)
5553 {
5554 enum elf_ppc_reloc_type r_type;
5555 bfd_vma addend;
5556 bfd_reloc_status_type r;
5557 Elf_Internal_Sym *sym;
5558 asection *sec;
5559 struct elf_link_hash_entry *h;
5560 const char *sym_name;
5561 reloc_howto_type *howto;
5562 unsigned long r_symndx;
5563 bfd_vma relocation;
5564 bfd_vma branch_bit, insn, from;
5565 bfd_boolean unresolved_reloc;
5566 bfd_boolean warned;
5567 unsigned int tls_type, tls_mask, tls_gd;
5568
5569 r_type = ELF32_R_TYPE (rel->r_info);
5570 sym = NULL;
5571 sec = NULL;
5572 h = NULL;
5573 unresolved_reloc = FALSE;
5574 warned = FALSE;
5575 r_symndx = ELF32_R_SYM (rel->r_info);
5576
5577 if (r_symndx < symtab_hdr->sh_info)
5578 {
5579 sym = local_syms + r_symndx;
5580 sec = local_sections[r_symndx];
5581 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5582
5583 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5584 }
5585 else
5586 {
5587 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5588 r_symndx, symtab_hdr, sym_hashes,
5589 h, sec, relocation,
5590 unresolved_reloc, warned);
5591
5592 sym_name = h->root.root.string;
5593 }
5594
5595 /* TLS optimizations. Replace instruction sequences and relocs
5596 based on information we collected in tls_optimize. We edit
5597 RELOCS so that --emit-relocs will output something sensible
5598 for the final instruction stream. */
5599 tls_mask = 0;
5600 tls_gd = 0;
5601 if (IS_PPC_TLS_RELOC (r_type))
5602 {
5603 if (h != NULL)
5604 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5605 else if (local_got_offsets != NULL)
5606 {
5607 char *lgot_masks;
5608 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5609 tls_mask = lgot_masks[r_symndx];
5610 }
5611 }
5612
5613 /* Ensure reloc mapping code below stays sane. */
5614 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5615 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5616 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5617 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5618 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5619 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5620 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5621 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5622 abort ();
5623 switch (r_type)
5624 {
5625 default:
5626 break;
5627
5628 case R_PPC_GOT_TPREL16:
5629 case R_PPC_GOT_TPREL16_LO:
5630 if (tls_mask != 0
5631 && (tls_mask & TLS_TPREL) == 0)
5632 {
5633 bfd_vma insn;
5634 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5635 insn &= 31 << 21;
5636 insn |= 0x3c020000; /* addis 0,2,0 */
5637 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5638 r_type = R_PPC_TPREL16_HA;
5639 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5640 }
5641 break;
5642
5643 case R_PPC_TLS:
5644 if (tls_mask != 0
5645 && (tls_mask & TLS_TPREL) == 0)
5646 {
5647 bfd_vma insn, rtra;
5648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5649 if ((insn & ((31 << 26) | (31 << 11)))
5650 == ((31 << 26) | (2 << 11)))
5651 rtra = insn & ((1 << 26) - (1 << 16));
5652 else if ((insn & ((31 << 26) | (31 << 16)))
5653 == ((31 << 26) | (2 << 16)))
5654 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5655 else
5656 abort ();
5657 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5658 /* add -> addi. */
5659 insn = 14 << 26;
5660 else if ((insn & (31 << 1)) == 23 << 1
5661 && ((insn & (31 << 6)) < 14 << 6
5662 || ((insn & (31 << 6)) >= 16 << 6
5663 && (insn & (31 << 6)) < 24 << 6)))
5664 /* load and store indexed -> dform. */
5665 insn = (32 | ((insn >> 6) & 31)) << 26;
5666 else if ((insn & (31 << 1)) == 21 << 1
5667 && (insn & (0x1a << 6)) == 0)
5668 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5669 insn = (((58 | ((insn >> 6) & 4)) << 26)
5670 | ((insn >> 6) & 1));
5671 else if ((insn & (31 << 1)) == 21 << 1
5672 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5673 /* lwax -> lwa. */
5674 insn = (58 << 26) | 2;
5675 else
5676 abort ();
5677 insn |= rtra;
5678 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5679 r_type = R_PPC_TPREL16_LO;
5680 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5681
5682 /* Was PPC_TLS which sits on insn boundary, now
5683 PPC_TPREL16_LO which is at low-order half-word. */
5684 rel->r_offset += d_offset;
5685 }
5686 break;
5687
5688 case R_PPC_GOT_TLSGD16_HI:
5689 case R_PPC_GOT_TLSGD16_HA:
5690 tls_gd = TLS_TPRELGD;
5691 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5692 goto tls_gdld_hi;
5693 break;
5694
5695 case R_PPC_GOT_TLSLD16_HI:
5696 case R_PPC_GOT_TLSLD16_HA:
5697 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5698 {
5699 tls_gdld_hi:
5700 if ((tls_mask & tls_gd) != 0)
5701 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5702 + R_PPC_GOT_TPREL16);
5703 else
5704 {
5705 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5706 rel->r_offset -= d_offset;
5707 r_type = R_PPC_NONE;
5708 }
5709 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5710 }
5711 break;
5712
5713 case R_PPC_GOT_TLSGD16:
5714 case R_PPC_GOT_TLSGD16_LO:
5715 tls_gd = TLS_TPRELGD;
5716 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5717 goto tls_get_addr_check;
5718 break;
5719
5720 case R_PPC_GOT_TLSLD16:
5721 case R_PPC_GOT_TLSLD16_LO:
5722 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5723 {
5724 tls_get_addr_check:
5725 if (rel + 1 < relend)
5726 {
5727 enum elf_ppc_reloc_type r_type2;
5728 unsigned long r_symndx2;
5729 struct elf_link_hash_entry *h2;
5730 bfd_vma insn1, insn2;
5731 bfd_vma offset;
5732
5733 /* The next instruction should be a call to
5734 __tls_get_addr. Peek at the reloc to be sure. */
5735 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5736 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5737 if (r_symndx2 < symtab_hdr->sh_info
5738 || (r_type2 != R_PPC_REL14
5739 && r_type2 != R_PPC_REL14_BRTAKEN
5740 && r_type2 != R_PPC_REL14_BRNTAKEN
5741 && r_type2 != R_PPC_REL24
5742 && r_type2 != R_PPC_PLTREL24))
5743 break;
5744
5745 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5746 while (h2->root.type == bfd_link_hash_indirect
5747 || h2->root.type == bfd_link_hash_warning)
5748 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5749 if (h2 == NULL || h2 != htab->tls_get_addr)
5750 break;
5751
5752 /* OK, it checks out. Replace the call. */
5753 offset = rel[1].r_offset;
5754 insn1 = bfd_get_32 (output_bfd,
5755 contents + rel->r_offset - d_offset);
5756 if ((tls_mask & tls_gd) != 0)
5757 {
5758 /* IE */
5759 insn1 &= (1 << 26) - 1;
5760 insn1 |= 32 << 26; /* lwz */
5761 insn2 = 0x7c631214; /* add 3,3,2 */
5762 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5763 rel[1].r_addend = 0;
5764 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5765 + R_PPC_GOT_TPREL16);
5766 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5767 }
5768 else
5769 {
5770 /* LE */
5771 insn1 = 0x3c620000; /* addis 3,2,0 */
5772 insn2 = 0x38630000; /* addi 3,3,0 */
5773 if (tls_gd == 0)
5774 {
5775 /* Was an LD reloc. */
5776 r_symndx = 0;
5777 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5778 }
5779 r_type = R_PPC_TPREL16_HA;
5780 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5781 rel[1].r_info = ELF32_R_INFO (r_symndx,
5782 R_PPC_TPREL16_LO);
5783 rel[1].r_offset += d_offset;
5784 rel[1].r_addend = rel->r_addend;
5785 }
5786 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5787 bfd_put_32 (output_bfd, insn2, contents + offset);
5788 if (tls_gd == 0)
5789 {
5790 /* We changed the symbol on an LD reloc. Start over
5791 in order to get h, sym, sec etc. right. */
5792 rel--;
5793 continue;
5794 }
5795 }
5796 }
5797 break;
5798 }
5799
5800 /* Handle other relocations that tweak non-addend part of insn. */
5801 branch_bit = 0;
5802 switch (r_type)
5803 {
5804 default:
5805 break;
5806
5807 /* Branch taken prediction relocations. */
5808 case R_PPC_ADDR14_BRTAKEN:
5809 case R_PPC_REL14_BRTAKEN:
5810 branch_bit = BRANCH_PREDICT_BIT;
5811 /* Fall thru */
5812
5813 /* Branch not taken prediction relocations. */
5814 case R_PPC_ADDR14_BRNTAKEN:
5815 case R_PPC_REL14_BRNTAKEN:
5816 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5817 insn &= ~BRANCH_PREDICT_BIT;
5818 insn |= branch_bit;
5819
5820 from = (rel->r_offset
5821 + input_section->output_offset
5822 + input_section->output_section->vma);
5823
5824 /* Invert 'y' bit if not the default. */
5825 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5826 insn ^= BRANCH_PREDICT_BIT;
5827
5828 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5829 break;
5830 }
5831
5832 addend = rel->r_addend;
5833 tls_type = 0;
5834 howto = NULL;
5835 if (r_type < R_PPC_max)
5836 howto = ppc_elf_howto_table[r_type];
5837 switch (r_type)
5838 {
5839 default:
5840 (*_bfd_error_handler)
5841 (_("%B: unknown relocation type %d for symbol %s"),
5842 input_bfd, (int) r_type, sym_name);
5843
5844 bfd_set_error (bfd_error_bad_value);
5845 ret = FALSE;
5846 continue;
5847
5848 case R_PPC_NONE:
5849 case R_PPC_TLS:
5850 case R_PPC_EMB_MRKREF:
5851 case R_PPC_GNU_VTINHERIT:
5852 case R_PPC_GNU_VTENTRY:
5853 continue;
5854
5855 /* GOT16 relocations. Like an ADDR16 using the symbol's
5856 address in the GOT as relocation value instead of the
5857 symbol's value itself. Also, create a GOT entry for the
5858 symbol and put the symbol value there. */
5859 case R_PPC_GOT_TLSGD16:
5860 case R_PPC_GOT_TLSGD16_LO:
5861 case R_PPC_GOT_TLSGD16_HI:
5862 case R_PPC_GOT_TLSGD16_HA:
5863 tls_type = TLS_TLS | TLS_GD;
5864 goto dogot;
5865
5866 case R_PPC_GOT_TLSLD16:
5867 case R_PPC_GOT_TLSLD16_LO:
5868 case R_PPC_GOT_TLSLD16_HI:
5869 case R_PPC_GOT_TLSLD16_HA:
5870 tls_type = TLS_TLS | TLS_LD;
5871 goto dogot;
5872
5873 case R_PPC_GOT_TPREL16:
5874 case R_PPC_GOT_TPREL16_LO:
5875 case R_PPC_GOT_TPREL16_HI:
5876 case R_PPC_GOT_TPREL16_HA:
5877 tls_type = TLS_TLS | TLS_TPREL;
5878 goto dogot;
5879
5880 case R_PPC_GOT_DTPREL16:
5881 case R_PPC_GOT_DTPREL16_LO:
5882 case R_PPC_GOT_DTPREL16_HI:
5883 case R_PPC_GOT_DTPREL16_HA:
5884 tls_type = TLS_TLS | TLS_DTPREL;
5885 goto dogot;
5886
5887 case R_PPC_GOT16:
5888 case R_PPC_GOT16_LO:
5889 case R_PPC_GOT16_HI:
5890 case R_PPC_GOT16_HA:
5891 dogot:
5892 {
5893 /* Relocation is to the entry for this symbol in the global
5894 offset table. */
5895 bfd_vma off;
5896 bfd_vma *offp;
5897 unsigned long indx;
5898
5899 if (htab->got == NULL)
5900 abort ();
5901
5902 indx = 0;
5903 if (tls_type == (TLS_TLS | TLS_LD)
5904 && (h == NULL
5905 || !h->def_dynamic))
5906 offp = &htab->tlsld_got.offset;
5907 else if (h != NULL)
5908 {
5909 bfd_boolean dyn;
5910 dyn = htab->elf.dynamic_sections_created;
5911 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5912 || (info->shared
5913 && SYMBOL_REFERENCES_LOCAL (info, h)))
5914 /* This is actually a static link, or it is a
5915 -Bsymbolic link and the symbol is defined
5916 locally, or the symbol was forced to be local
5917 because of a version file. */
5918 ;
5919 else
5920 {
5921 indx = h->dynindx;
5922 unresolved_reloc = FALSE;
5923 }
5924 offp = &h->got.offset;
5925 }
5926 else
5927 {
5928 if (local_got_offsets == NULL)
5929 abort ();
5930 offp = &local_got_offsets[r_symndx];
5931 }
5932
5933 /* The offset must always be a multiple of 4. We use the
5934 least significant bit to record whether we have already
5935 processed this entry. */
5936 off = *offp;
5937 if ((off & 1) != 0)
5938 off &= ~1;
5939 else
5940 {
5941 unsigned int tls_m = (tls_mask
5942 & (TLS_LD | TLS_GD | TLS_DTPREL
5943 | TLS_TPREL | TLS_TPRELGD));
5944
5945 if (offp == &htab->tlsld_got.offset)
5946 tls_m = TLS_LD;
5947 else if (h == NULL
5948 || !h->def_dynamic)
5949 tls_m &= ~TLS_LD;
5950
5951 /* We might have multiple got entries for this sym.
5952 Initialize them all. */
5953 do
5954 {
5955 int tls_ty = 0;
5956
5957 if ((tls_m & TLS_LD) != 0)
5958 {
5959 tls_ty = TLS_TLS | TLS_LD;
5960 tls_m &= ~TLS_LD;
5961 }
5962 else if ((tls_m & TLS_GD) != 0)
5963 {
5964 tls_ty = TLS_TLS | TLS_GD;
5965 tls_m &= ~TLS_GD;
5966 }
5967 else if ((tls_m & TLS_DTPREL) != 0)
5968 {
5969 tls_ty = TLS_TLS | TLS_DTPREL;
5970 tls_m &= ~TLS_DTPREL;
5971 }
5972 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5973 {
5974 tls_ty = TLS_TLS | TLS_TPREL;
5975 tls_m = 0;
5976 }
5977
5978 /* Generate relocs for the dynamic linker. */
5979 if ((info->shared || indx != 0)
5980 && (h == NULL
5981 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5982 || h->root.type != bfd_link_hash_undefweak))
5983 {
5984 outrel.r_offset = (htab->got->output_section->vma
5985 + htab->got->output_offset
5986 + off);
5987 outrel.r_addend = 0;
5988 if (tls_ty & (TLS_LD | TLS_GD))
5989 {
5990 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5991 if (tls_ty == (TLS_TLS | TLS_GD))
5992 {
5993 loc = htab->relgot->contents;
5994 loc += (htab->relgot->reloc_count++
5995 * sizeof (Elf32_External_Rela));
5996 bfd_elf32_swap_reloca_out (output_bfd,
5997 &outrel, loc);
5998 outrel.r_offset += 4;
5999 outrel.r_info
6000 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6001 }
6002 }
6003 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6004 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6005 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6006 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6007 else if (indx == 0)
6008 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6009 else
6010 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6011 if (indx == 0)
6012 {
6013 outrel.r_addend += relocation;
6014 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6015 outrel.r_addend -= htab->elf.tls_sec->vma;
6016 }
6017 loc = htab->relgot->contents;
6018 loc += (htab->relgot->reloc_count++
6019 * sizeof (Elf32_External_Rela));
6020 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6021 }
6022
6023 /* Init the .got section contents if we're not
6024 emitting a reloc. */
6025 else
6026 {
6027 bfd_vma value = relocation;
6028
6029 if (tls_ty == (TLS_TLS | TLS_LD))
6030 value = 1;
6031 else if (tls_ty != 0)
6032 {
6033 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6034 if (tls_ty == (TLS_TLS | TLS_TPREL))
6035 value += DTP_OFFSET - TP_OFFSET;
6036
6037 if (tls_ty == (TLS_TLS | TLS_GD))
6038 {
6039 bfd_put_32 (output_bfd, value,
6040 htab->got->contents + off + 4);
6041 value = 1;
6042 }
6043 }
6044 bfd_put_32 (output_bfd, value,
6045 htab->got->contents + off);
6046 }
6047
6048 off += 4;
6049 if (tls_ty & (TLS_LD | TLS_GD))
6050 off += 4;
6051 }
6052 while (tls_m != 0);
6053
6054 off = *offp;
6055 *offp = off | 1;
6056 }
6057
6058 if (off >= (bfd_vma) -2)
6059 abort ();
6060
6061 if ((tls_type & TLS_TLS) != 0)
6062 {
6063 if (tls_type != (TLS_TLS | TLS_LD))
6064 {
6065 if ((tls_mask & TLS_LD) != 0
6066 && !(h == NULL
6067 || !h->def_dynamic))
6068 off += 8;
6069 if (tls_type != (TLS_TLS | TLS_GD))
6070 {
6071 if ((tls_mask & TLS_GD) != 0)
6072 off += 8;
6073 if (tls_type != (TLS_TLS | TLS_DTPREL))
6074 {
6075 if ((tls_mask & TLS_DTPREL) != 0)
6076 off += 4;
6077 }
6078 }
6079 }
6080 }
6081
6082 relocation = htab->got->output_offset + off;
6083 relocation -= htab->elf.hgot->root.u.def.value;
6084
6085 /* Addends on got relocations don't make much sense.
6086 x+off@got is actually x@got+off, and since the got is
6087 generated by a hash table traversal, the value in the
6088 got at entry m+n bears little relation to the entry m. */
6089 if (addend != 0)
6090 (*_bfd_error_handler)
6091 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6092 input_bfd,
6093 input_section,
6094 (long) rel->r_offset,
6095 howto->name,
6096 sym_name);
6097 }
6098 break;
6099
6100 /* Relocations that need no special processing. */
6101 case R_PPC_LOCAL24PC:
6102 /* It makes no sense to point a local relocation
6103 at a symbol not in this object. */
6104 if (unresolved_reloc)
6105 {
6106 if (! (*info->callbacks->undefined_symbol) (info,
6107 h->root.root.string,
6108 input_bfd,
6109 input_section,
6110 rel->r_offset,
6111 TRUE))
6112 return FALSE;
6113 continue;
6114 }
6115 break;
6116
6117 case R_PPC_DTPREL16:
6118 case R_PPC_DTPREL16_LO:
6119 case R_PPC_DTPREL16_HI:
6120 case R_PPC_DTPREL16_HA:
6121 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6122 break;
6123
6124 /* Relocations that may need to be propagated if this is a shared
6125 object. */
6126 case R_PPC_TPREL16:
6127 case R_PPC_TPREL16_LO:
6128 case R_PPC_TPREL16_HI:
6129 case R_PPC_TPREL16_HA:
6130 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6131 /* The TPREL16 relocs shouldn't really be used in shared
6132 libs as they will result in DT_TEXTREL being set, but
6133 support them anyway. */
6134 goto dodyn;
6135
6136 case R_PPC_TPREL32:
6137 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6138 goto dodyn;
6139
6140 case R_PPC_DTPREL32:
6141 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6142 goto dodyn;
6143
6144 case R_PPC_DTPMOD32:
6145 relocation = 1;
6146 addend = 0;
6147 goto dodyn;
6148
6149 case R_PPC_REL16:
6150 case R_PPC_REL16_LO:
6151 case R_PPC_REL16_HI:
6152 case R_PPC_REL16_HA:
6153 break;
6154
6155 case R_PPC_REL24:
6156 case R_PPC_REL32:
6157 case R_PPC_REL14:
6158 case R_PPC_REL14_BRTAKEN:
6159 case R_PPC_REL14_BRNTAKEN:
6160 /* If these relocations are not to a named symbol, they can be
6161 handled right here, no need to bother the dynamic linker. */
6162 if (SYMBOL_REFERENCES_LOCAL (info, h)
6163 || h == htab->elf.hgot)
6164 break;
6165 /* fall through */
6166
6167 /* Relocations that always need to be propagated if this is a shared
6168 object. */
6169 case R_PPC_ADDR32:
6170 case R_PPC_ADDR24:
6171 case R_PPC_ADDR16:
6172 case R_PPC_ADDR16_LO:
6173 case R_PPC_ADDR16_HI:
6174 case R_PPC_ADDR16_HA:
6175 case R_PPC_ADDR14:
6176 case R_PPC_ADDR14_BRTAKEN:
6177 case R_PPC_ADDR14_BRNTAKEN:
6178 case R_PPC_UADDR32:
6179 case R_PPC_UADDR16:
6180 /* r_symndx will be zero only for relocs against symbols
6181 from removed linkonce sections, or sections discarded by
6182 a linker script. */
6183 dodyn:
6184 if (r_symndx == 0)
6185 {
6186 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6187 break;
6188 }
6189 /* Fall thru. */
6190
6191 if ((input_section->flags & SEC_ALLOC) == 0)
6192 break;
6193 /* Fall thru. */
6194
6195 if ((info->shared
6196 && (h == NULL
6197 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6198 || h->root.type != bfd_link_hash_undefweak)
6199 && (MUST_BE_DYN_RELOC (r_type)
6200 || !SYMBOL_CALLS_LOCAL (info, h)))
6201 || (ELIMINATE_COPY_RELOCS
6202 && !info->shared
6203 && h != NULL
6204 && h->dynindx != -1
6205 && !h->non_got_ref
6206 && h->def_dynamic
6207 && !h->def_regular))
6208 {
6209 int skip;
6210
6211 #ifdef DEBUG
6212 fprintf (stderr, "ppc_elf_relocate_section needs to "
6213 "create relocation for %s\n",
6214 (h && h->root.root.string
6215 ? h->root.root.string : "<unknown>"));
6216 #endif
6217
6218 /* When generating a shared object, these relocations
6219 are copied into the output file to be resolved at run
6220 time. */
6221 if (sreloc == NULL)
6222 {
6223 const char *name;
6224
6225 name = (bfd_elf_string_from_elf_section
6226 (input_bfd,
6227 elf_elfheader (input_bfd)->e_shstrndx,
6228 elf_section_data (input_section)->rel_hdr.sh_name));
6229 if (name == NULL)
6230 return FALSE;
6231
6232 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6233 && strcmp (bfd_get_section_name (input_bfd,
6234 input_section),
6235 name + 5) == 0);
6236
6237 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6238 BFD_ASSERT (sreloc != NULL);
6239 }
6240
6241 skip = 0;
6242
6243 outrel.r_offset =
6244 _bfd_elf_section_offset (output_bfd, info, input_section,
6245 rel->r_offset);
6246 if (outrel.r_offset == (bfd_vma) -1
6247 || outrel.r_offset == (bfd_vma) -2)
6248 skip = (int) outrel.r_offset;
6249 outrel.r_offset += (input_section->output_section->vma
6250 + input_section->output_offset);
6251
6252 if (skip)
6253 memset (&outrel, 0, sizeof outrel);
6254 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6255 {
6256 unresolved_reloc = FALSE;
6257 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6258 outrel.r_addend = rel->r_addend;
6259 }
6260 else
6261 {
6262 outrel.r_addend = relocation + rel->r_addend;
6263
6264 if (r_type == R_PPC_ADDR32)
6265 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6266 else
6267 {
6268 long indx;
6269
6270 if (bfd_is_abs_section (sec))
6271 indx = 0;
6272 else if (sec == NULL || sec->owner == NULL)
6273 {
6274 bfd_set_error (bfd_error_bad_value);
6275 return FALSE;
6276 }
6277 else
6278 {
6279 asection *osec;
6280
6281 /* We are turning this relocation into one
6282 against a section symbol. It would be
6283 proper to subtract the symbol's value,
6284 osec->vma, from the emitted reloc addend,
6285 but ld.so expects buggy relocs. */
6286 osec = sec->output_section;
6287 indx = elf_section_data (osec)->dynindx;
6288 if (indx == 0)
6289 {
6290 osec = htab->elf.text_index_section;
6291 indx = elf_section_data (osec)->dynindx;
6292 }
6293 BFD_ASSERT (indx != 0);
6294 #ifdef DEBUG
6295 if (indx == 0)
6296 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6297 indx, osec->name, osec->flags,
6298 h->root.root.string);
6299 #endif
6300 }
6301
6302 outrel.r_info = ELF32_R_INFO (indx, r_type);
6303 }
6304 }
6305
6306 loc = sreloc->contents;
6307 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6308 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6309
6310 if (skip == -1)
6311 continue;
6312
6313 /* This reloc will be computed at runtime. We clear the memory
6314 so that it contains predictable value. */
6315 if (! skip
6316 && ((input_section->flags & SEC_ALLOC) != 0
6317 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6318 {
6319 relocation = howto->pc_relative ? outrel.r_offset : 0;
6320 addend = 0;
6321 break;
6322 }
6323 }
6324 break;
6325
6326 case R_PPC_RELAX32PC_PLT:
6327 case R_PPC_RELAX32_PLT:
6328 {
6329 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6330
6331 if (htab->plt_type == PLT_NEW)
6332 relocation = (htab->glink->output_section->vma
6333 + htab->glink->output_offset
6334 + ent->glink_offset);
6335 else
6336 relocation = (htab->plt->output_section->vma
6337 + htab->plt->output_offset
6338 + ent->plt.offset);
6339 addend = 0;
6340 }
6341 if (r_type == R_PPC_RELAX32_PLT)
6342 goto relax32;
6343 /* Fall thru */
6344
6345 case R_PPC_RELAX32PC:
6346 relocation -= (input_section->output_section->vma
6347 + input_section->output_offset
6348 + rel->r_offset - 4);
6349 /* Fall thru */
6350
6351 case R_PPC_RELAX32:
6352 relax32:
6353 {
6354 unsigned long t0;
6355 unsigned long t1;
6356
6357 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6358 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6359
6360 /* We're clearing the bits for R_PPC_ADDR16_HA
6361 and R_PPC_ADDR16_LO here. */
6362 t0 &= ~0xffff;
6363 t1 &= ~0xffff;
6364
6365 /* t0 is HA, t1 is LO */
6366 relocation += addend;
6367 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6368 t1 |= relocation & 0xffff;
6369
6370 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6371 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6372 }
6373 continue;
6374
6375 /* Indirect .sdata relocation. */
6376 case R_PPC_EMB_SDAI16:
6377 BFD_ASSERT (htab->sdata[0].section != NULL);
6378 relocation
6379 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6380 h, relocation, rel);
6381 break;
6382
6383 /* Indirect .sdata2 relocation. */
6384 case R_PPC_EMB_SDA2I16:
6385 BFD_ASSERT (htab->sdata[1].section != NULL);
6386 relocation
6387 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6388 h, relocation, rel);
6389 break;
6390
6391 /* Handle the TOC16 reloc. We want to use the offset within the .got
6392 section, not the actual VMA. This is appropriate when generating
6393 an embedded ELF object, for which the .got section acts like the
6394 AIX .toc section. */
6395 case R_PPC_TOC16: /* phony GOT16 relocations */
6396 BFD_ASSERT (sec != NULL);
6397 BFD_ASSERT (bfd_is_und_section (sec)
6398 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6399 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6400
6401 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6402 break;
6403
6404 case R_PPC_PLTREL24:
6405 /* Relocation is to the entry for this symbol in the
6406 procedure linkage table. */
6407 {
6408 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6409
6410 addend = 0;
6411 if (ent == NULL
6412 || htab->plt == NULL)
6413 {
6414 /* We didn't make a PLT entry for this symbol. This
6415 happens when statically linking PIC code, or when
6416 using -Bsymbolic. */
6417 break;
6418 }
6419
6420 unresolved_reloc = FALSE;
6421 if (htab->plt_type == PLT_NEW)
6422 relocation = (htab->glink->output_section->vma
6423 + htab->glink->output_offset
6424 + ent->glink_offset);
6425 else
6426 relocation = (htab->plt->output_section->vma
6427 + htab->plt->output_offset
6428 + ent->plt.offset);
6429 }
6430 break;
6431
6432 /* Relocate against _SDA_BASE_. */
6433 case R_PPC_SDAREL16:
6434 {
6435 const char *name;
6436 struct elf_link_hash_entry *sh;
6437
6438 BFD_ASSERT (sec != NULL);
6439 name = bfd_get_section_name (abfd, sec->output_section);
6440 if (! ((CONST_STRNEQ (name, ".sdata")
6441 && (name[6] == 0 || name[6] == '.'))
6442 || (CONST_STRNEQ (name, ".sbss")
6443 && (name[5] == 0 || name[5] == '.'))))
6444 {
6445 (*_bfd_error_handler)
6446 (_("%B: the target (%s) of a %s relocation is "
6447 "in the wrong output section (%s)"),
6448 input_bfd,
6449 sym_name,
6450 howto->name,
6451 name);
6452 }
6453 sh = htab->sdata[0].sym;
6454 addend -= (sh->root.u.def.value
6455 + sh->root.u.def.section->output_offset
6456 + sh->root.u.def.section->output_section->vma);
6457 }
6458 break;
6459
6460 /* Relocate against _SDA2_BASE_. */
6461 case R_PPC_EMB_SDA2REL:
6462 {
6463 const char *name;
6464 struct elf_link_hash_entry *sh;
6465
6466 BFD_ASSERT (sec != NULL);
6467 name = bfd_get_section_name (abfd, sec->output_section);
6468 if (! (CONST_STRNEQ (name, ".sdata2")
6469 || CONST_STRNEQ (name, ".sbss2")))
6470 {
6471 (*_bfd_error_handler)
6472 (_("%B: the target (%s) of a %s relocation is "
6473 "in the wrong output section (%s)"),
6474 input_bfd,
6475 sym_name,
6476 howto->name,
6477 name);
6478
6479 bfd_set_error (bfd_error_bad_value);
6480 ret = FALSE;
6481 continue;
6482 }
6483 sh = htab->sdata[1].sym;
6484 addend -= (sh->root.u.def.value
6485 + sh->root.u.def.section->output_offset
6486 + sh->root.u.def.section->output_section->vma);
6487 }
6488 break;
6489
6490 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6491 case R_PPC_EMB_SDA21:
6492 case R_PPC_EMB_RELSDA:
6493 {
6494 const char *name;
6495 int reg;
6496 struct elf_link_hash_entry *sh;
6497
6498 BFD_ASSERT (sec != NULL);
6499 name = bfd_get_section_name (abfd, sec->output_section);
6500 if (((CONST_STRNEQ (name, ".sdata")
6501 && (name[6] == 0 || name[6] == '.'))
6502 || (CONST_STRNEQ (name, ".sbss")
6503 && (name[5] == 0 || name[5] == '.'))))
6504 {
6505 reg = 13;
6506 sh = htab->sdata[0].sym;
6507 addend -= (sh->root.u.def.value
6508 + sh->root.u.def.section->output_offset
6509 + sh->root.u.def.section->output_section->vma);
6510 }
6511
6512 else if (CONST_STRNEQ (name, ".sdata2")
6513 || CONST_STRNEQ (name, ".sbss2"))
6514 {
6515 reg = 2;
6516 sh = htab->sdata[1].sym;
6517 addend -= (sh->root.u.def.value
6518 + sh->root.u.def.section->output_offset
6519 + sh->root.u.def.section->output_section->vma);
6520 }
6521
6522 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6523 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6524 {
6525 reg = 0;
6526 }
6527
6528 else
6529 {
6530 (*_bfd_error_handler)
6531 (_("%B: the target (%s) of a %s relocation is "
6532 "in the wrong output section (%s)"),
6533 input_bfd,
6534 sym_name,
6535 howto->name,
6536 name);
6537
6538 bfd_set_error (bfd_error_bad_value);
6539 ret = FALSE;
6540 continue;
6541 }
6542
6543 if (r_type == R_PPC_EMB_SDA21)
6544 { /* fill in register field */
6545 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6546 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6547 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6548 }
6549 }
6550 break;
6551
6552 /* Relocate against the beginning of the section. */
6553 case R_PPC_SECTOFF:
6554 case R_PPC_SECTOFF_LO:
6555 case R_PPC_SECTOFF_HI:
6556 case R_PPC_SECTOFF_HA:
6557 BFD_ASSERT (sec != NULL);
6558 addend -= sec->output_section->vma;
6559 break;
6560
6561 /* Negative relocations. */
6562 case R_PPC_EMB_NADDR32:
6563 case R_PPC_EMB_NADDR16:
6564 case R_PPC_EMB_NADDR16_LO:
6565 case R_PPC_EMB_NADDR16_HI:
6566 case R_PPC_EMB_NADDR16_HA:
6567 addend -= 2 * relocation;
6568 break;
6569
6570 case R_PPC_COPY:
6571 case R_PPC_GLOB_DAT:
6572 case R_PPC_JMP_SLOT:
6573 case R_PPC_RELATIVE:
6574 case R_PPC_PLT32:
6575 case R_PPC_PLTREL32:
6576 case R_PPC_PLT16_LO:
6577 case R_PPC_PLT16_HI:
6578 case R_PPC_PLT16_HA:
6579 case R_PPC_ADDR30:
6580 case R_PPC_EMB_RELSEC16:
6581 case R_PPC_EMB_RELST_LO:
6582 case R_PPC_EMB_RELST_HI:
6583 case R_PPC_EMB_RELST_HA:
6584 case R_PPC_EMB_BIT_FLD:
6585 (*_bfd_error_handler)
6586 (_("%B: relocation %s is not yet supported for symbol %s."),
6587 input_bfd,
6588 howto->name,
6589 sym_name);
6590
6591 bfd_set_error (bfd_error_invalid_operation);
6592 ret = FALSE;
6593 continue;
6594 }
6595
6596 /* Do any further special processing. */
6597 switch (r_type)
6598 {
6599 default:
6600 break;
6601
6602 case R_PPC_ADDR16_HA:
6603 case R_PPC_REL16_HA:
6604 case R_PPC_SECTOFF_HA:
6605 case R_PPC_TPREL16_HA:
6606 case R_PPC_DTPREL16_HA:
6607 case R_PPC_EMB_NADDR16_HA:
6608 case R_PPC_EMB_RELST_HA:
6609 /* It's just possible that this symbol is a weak symbol
6610 that's not actually defined anywhere. In that case,
6611 'sec' would be NULL, and we should leave the symbol
6612 alone (it will be set to zero elsewhere in the link). */
6613 if (sec == NULL)
6614 break;
6615 /* Fall thru */
6616
6617 case R_PPC_PLT16_HA:
6618 case R_PPC_GOT16_HA:
6619 case R_PPC_GOT_TLSGD16_HA:
6620 case R_PPC_GOT_TLSLD16_HA:
6621 case R_PPC_GOT_TPREL16_HA:
6622 case R_PPC_GOT_DTPREL16_HA:
6623 /* Add 0x10000 if sign bit in 0:15 is set.
6624 Bits 0:15 are not used. */
6625 addend += 0x8000;
6626 break;
6627 }
6628
6629 #ifdef DEBUG
6630 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6631 "offset = %ld, addend = %ld\n",
6632 howto->name,
6633 (int) r_type,
6634 sym_name,
6635 r_symndx,
6636 (long) rel->r_offset,
6637 (long) addend);
6638 #endif
6639
6640 if (unresolved_reloc
6641 && !((input_section->flags & SEC_DEBUGGING) != 0
6642 && h->def_dynamic))
6643 {
6644 (*_bfd_error_handler)
6645 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6646 input_bfd,
6647 input_section,
6648 (long) rel->r_offset,
6649 howto->name,
6650 sym_name);
6651 ret = FALSE;
6652 }
6653
6654 r = _bfd_final_link_relocate (howto,
6655 input_bfd,
6656 input_section,
6657 contents,
6658 rel->r_offset,
6659 relocation,
6660 addend);
6661
6662 if (r != bfd_reloc_ok)
6663 {
6664 if (r == bfd_reloc_overflow)
6665 {
6666 if (warned)
6667 continue;
6668 if (h != NULL
6669 && h->root.type == bfd_link_hash_undefweak
6670 && howto->pc_relative)
6671 {
6672 /* Assume this is a call protected by other code that
6673 detect the symbol is undefined. If this is the case,
6674 we can safely ignore the overflow. If not, the
6675 program is hosed anyway, and a little warning isn't
6676 going to help. */
6677
6678 continue;
6679 }
6680
6681 if (! (*info->callbacks->reloc_overflow) (info,
6682 (h ? &h->root : NULL),
6683 sym_name,
6684 howto->name,
6685 rel->r_addend,
6686 input_bfd,
6687 input_section,
6688 rel->r_offset))
6689 return FALSE;
6690 }
6691 else
6692 {
6693 (*_bfd_error_handler)
6694 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6695 input_bfd, input_section,
6696 (long) rel->r_offset, howto->name, sym_name, (int) r);
6697 ret = FALSE;
6698 }
6699 }
6700 }
6701
6702 #ifdef DEBUG
6703 fprintf (stderr, "\n");
6704 #endif
6705
6706 return ret;
6707 }
6708 \f
6709 #define PPC_LO(v) ((v) & 0xffff)
6710 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6711 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6712
6713 /* Finish up dynamic symbol handling. We set the contents of various
6714 dynamic sections here. */
6715
6716 static bfd_boolean
6717 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6718 struct bfd_link_info *info,
6719 struct elf_link_hash_entry *h,
6720 Elf_Internal_Sym *sym)
6721 {
6722 struct ppc_elf_link_hash_table *htab;
6723 struct plt_entry *ent;
6724 bfd_boolean doneone;
6725
6726 #ifdef DEBUG
6727 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6728 h->root.root.string);
6729 #endif
6730
6731 htab = ppc_elf_hash_table (info);
6732 BFD_ASSERT (htab->elf.dynobj != NULL);
6733
6734 doneone = FALSE;
6735 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6736 if (ent->plt.offset != (bfd_vma) -1)
6737 {
6738 if (!doneone)
6739 {
6740 Elf_Internal_Rela rela;
6741 bfd_byte *loc;
6742 bfd_vma reloc_index;
6743
6744 if (htab->plt_type == PLT_NEW)
6745 reloc_index = ent->plt.offset / 4;
6746 else
6747 {
6748 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6749 / htab->plt_slot_size);
6750 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6751 && htab->plt_type == PLT_OLD)
6752 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6753 }
6754
6755 /* This symbol has an entry in the procedure linkage table.
6756 Set it up. */
6757 if (htab->plt_type == PLT_VXWORKS)
6758 {
6759 bfd_vma got_offset;
6760 const bfd_vma *plt_entry;
6761
6762 /* The first three entries in .got.plt are reserved. */
6763 got_offset = (reloc_index + 3) * 4;
6764
6765 /* Use the right PLT. */
6766 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6767 : ppc_elf_vxworks_plt_entry;
6768
6769 /* Fill in the .plt on VxWorks. */
6770 if (info->shared)
6771 {
6772 bfd_vma got_offset_hi = (got_offset >> 16)
6773 + ((got_offset & 0x8000) >> 15);
6774
6775 bfd_put_32 (output_bfd,
6776 plt_entry[0] | (got_offset_hi & 0xffff),
6777 htab->plt->contents + ent->plt.offset + 0);
6778 bfd_put_32 (output_bfd,
6779 plt_entry[1] | (got_offset & 0xffff),
6780 htab->plt->contents + ent->plt.offset + 4);
6781 }
6782 else
6783 {
6784 bfd_vma got_loc
6785 = (got_offset
6786 + htab->elf.hgot->root.u.def.value
6787 + htab->elf.hgot->root.u.def.section->output_offset
6788 + htab->elf.hgot->root.u.def.section->output_section->vma);
6789 bfd_vma got_loc_hi = (got_loc >> 16)
6790 + ((got_loc & 0x8000) >> 15);
6791
6792 bfd_put_32 (output_bfd,
6793 plt_entry[0] | (got_loc_hi & 0xffff),
6794 htab->plt->contents + ent->plt.offset + 0);
6795 bfd_put_32 (output_bfd,
6796 plt_entry[1] | (got_loc & 0xffff),
6797 htab->plt->contents + ent->plt.offset + 4);
6798 }
6799
6800 bfd_put_32 (output_bfd, plt_entry[2],
6801 htab->plt->contents + ent->plt.offset + 8);
6802 bfd_put_32 (output_bfd, plt_entry[3],
6803 htab->plt->contents + ent->plt.offset + 12);
6804
6805 /* This instruction is an immediate load. The value loaded is
6806 the byte offset of the R_PPC_JMP_SLOT relocation from the
6807 start of the .rela.plt section. The value is stored in the
6808 low-order 16 bits of the load instruction. */
6809 /* NOTE: It appears that this is now an index rather than a
6810 prescaled offset. */
6811 bfd_put_32 (output_bfd,
6812 plt_entry[4] | reloc_index,
6813 htab->plt->contents + ent->plt.offset + 16);
6814 /* This instruction is a PC-relative branch whose target is
6815 the start of the PLT section. The address of this branch
6816 instruction is 20 bytes beyond the start of this PLT entry.
6817 The address is encoded in bits 6-29, inclusive. The value
6818 stored is right-shifted by two bits, permitting a 26-bit
6819 offset. */
6820 bfd_put_32 (output_bfd,
6821 (plt_entry[5]
6822 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6823 htab->plt->contents + ent->plt.offset + 20);
6824 bfd_put_32 (output_bfd, plt_entry[6],
6825 htab->plt->contents + ent->plt.offset + 24);
6826 bfd_put_32 (output_bfd, plt_entry[7],
6827 htab->plt->contents + ent->plt.offset + 28);
6828
6829 /* Fill in the GOT entry corresponding to this PLT slot with
6830 the address immediately after the the "bctr" instruction
6831 in this PLT entry. */
6832 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6833 + htab->plt->output_offset
6834 + ent->plt.offset + 16),
6835 htab->sgotplt->contents + got_offset);
6836
6837 if (!info->shared)
6838 {
6839 /* Fill in a couple of entries in .rela.plt.unloaded. */
6840 loc = htab->srelplt2->contents
6841 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6842 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6843 * sizeof (Elf32_External_Rela));
6844
6845 /* Provide the @ha relocation for the first instruction. */
6846 rela.r_offset = (htab->plt->output_section->vma
6847 + htab->plt->output_offset
6848 + ent->plt.offset + 2);
6849 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6850 R_PPC_ADDR16_HA);
6851 rela.r_addend = got_offset;
6852 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6853 loc += sizeof (Elf32_External_Rela);
6854
6855 /* Provide the @l relocation for the second instruction. */
6856 rela.r_offset = (htab->plt->output_section->vma
6857 + htab->plt->output_offset
6858 + ent->plt.offset + 6);
6859 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6860 R_PPC_ADDR16_LO);
6861 rela.r_addend = got_offset;
6862 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6863 loc += sizeof (Elf32_External_Rela);
6864
6865 /* Provide a relocation for the GOT entry corresponding to this
6866 PLT slot. Point it at the middle of the .plt entry. */
6867 rela.r_offset = (htab->sgotplt->output_section->vma
6868 + htab->sgotplt->output_offset
6869 + got_offset);
6870 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6871 R_PPC_ADDR32);
6872 rela.r_addend = ent->plt.offset + 16;
6873 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6874 }
6875
6876 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6877 In particular, the offset for the relocation is not the
6878 address of the PLT entry for this function, as specified
6879 by the ABI. Instead, the offset is set to the address of
6880 the GOT slot for this function. See EABI 4.4.4.1. */
6881 rela.r_offset = (htab->sgotplt->output_section->vma
6882 + htab->sgotplt->output_offset
6883 + got_offset);
6884
6885 }
6886 else
6887 {
6888 rela.r_offset = (htab->plt->output_section->vma
6889 + htab->plt->output_offset
6890 + ent->plt.offset);
6891 if (htab->plt_type == PLT_OLD)
6892 {
6893 /* We don't need to fill in the .plt. The ppc dynamic
6894 linker will fill it in. */
6895 }
6896 else
6897 {
6898 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6899 + htab->glink->output_section->vma
6900 + htab->glink->output_offset);
6901 bfd_put_32 (output_bfd, val,
6902 htab->plt->contents + ent->plt.offset);
6903 }
6904 }
6905
6906 /* Fill in the entry in the .rela.plt section. */
6907 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6908 rela.r_addend = 0;
6909
6910 loc = (htab->relplt->contents
6911 + reloc_index * sizeof (Elf32_External_Rela));
6912 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6913
6914 if (!h->def_regular)
6915 {
6916 /* Mark the symbol as undefined, rather than as defined in
6917 the .plt section. Leave the value alone. */
6918 sym->st_shndx = SHN_UNDEF;
6919 /* If the symbol is weak, we do need to clear the value.
6920 Otherwise, the PLT entry would provide a definition for
6921 the symbol even if the symbol wasn't defined anywhere,
6922 and so the symbol would never be NULL. */
6923 if (!h->ref_regular_nonweak)
6924 sym->st_value = 0;
6925 }
6926 doneone = TRUE;
6927 }
6928
6929 if (htab->plt_type == PLT_NEW)
6930 {
6931 bfd_vma plt;
6932 unsigned char *p;
6933
6934 plt = (ent->plt.offset
6935 + htab->plt->output_section->vma
6936 + htab->plt->output_offset);
6937 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6938
6939 if (info->shared || info->pie)
6940 {
6941 bfd_vma got = 0;
6942
6943 if (ent->addend >= 32768)
6944 got = (ent->addend
6945 + ent->sec->output_section->vma
6946 + ent->sec->output_offset);
6947 else if (htab->elf.hgot != NULL)
6948 got = (htab->elf.hgot->root.u.def.value
6949 + htab->elf.hgot->root.u.def.section->output_section->vma
6950 + htab->elf.hgot->root.u.def.section->output_offset);
6951
6952 plt -= got;
6953
6954 if (plt + 0x8000 < 0x10000)
6955 {
6956 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6957 p += 4;
6958 bfd_put_32 (output_bfd, MTCTR_11, p);
6959 p += 4;
6960 bfd_put_32 (output_bfd, BCTR, p);
6961 p += 4;
6962 bfd_put_32 (output_bfd, NOP, p);
6963 p += 4;
6964 }
6965 else
6966 {
6967 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6968 p += 4;
6969 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6970 p += 4;
6971 bfd_put_32 (output_bfd, MTCTR_11, p);
6972 p += 4;
6973 bfd_put_32 (output_bfd, BCTR, p);
6974 p += 4;
6975 }
6976 }
6977 else
6978 {
6979 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6980 p += 4;
6981 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6982 p += 4;
6983 bfd_put_32 (output_bfd, MTCTR_11, p);
6984 p += 4;
6985 bfd_put_32 (output_bfd, BCTR, p);
6986 p += 4;
6987
6988 /* We only need one non-PIC glink stub. */
6989 break;
6990 }
6991 }
6992 else
6993 break;
6994 }
6995
6996 if (h->needs_copy)
6997 {
6998 asection *s;
6999 Elf_Internal_Rela rela;
7000 bfd_byte *loc;
7001
7002 /* This symbols needs a copy reloc. Set it up. */
7003
7004 #ifdef DEBUG
7005 fprintf (stderr, ", copy");
7006 #endif
7007
7008 BFD_ASSERT (h->dynindx != -1);
7009
7010 if (ppc_elf_hash_entry (h)->has_sda_refs)
7011 s = htab->relsbss;
7012 else
7013 s = htab->relbss;
7014 BFD_ASSERT (s != NULL);
7015
7016 rela.r_offset = (h->root.u.def.value
7017 + h->root.u.def.section->output_section->vma
7018 + h->root.u.def.section->output_offset);
7019 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7020 rela.r_addend = 0;
7021 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7022 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7023 }
7024
7025 #ifdef DEBUG
7026 fprintf (stderr, "\n");
7027 #endif
7028
7029 /* Mark some specially defined symbols as absolute. */
7030 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7031 || (!htab->is_vxworks
7032 && (h == htab->elf.hgot
7033 || strcmp (h->root.root.string,
7034 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7035 sym->st_shndx = SHN_ABS;
7036
7037 return TRUE;
7038 }
7039 \f
7040 static enum elf_reloc_type_class
7041 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7042 {
7043 switch (ELF32_R_TYPE (rela->r_info))
7044 {
7045 case R_PPC_RELATIVE:
7046 return reloc_class_relative;
7047 case R_PPC_REL24:
7048 case R_PPC_ADDR24:
7049 case R_PPC_JMP_SLOT:
7050 return reloc_class_plt;
7051 case R_PPC_COPY:
7052 return reloc_class_copy;
7053 default:
7054 return reloc_class_normal;
7055 }
7056 }
7057 \f
7058 /* Finish up the dynamic sections. */
7059
7060 static bfd_boolean
7061 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7062 struct bfd_link_info *info)
7063 {
7064 asection *sdyn;
7065 asection *splt;
7066 struct ppc_elf_link_hash_table *htab;
7067 bfd_vma got;
7068 bfd * dynobj;
7069
7070 #ifdef DEBUG
7071 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7072 #endif
7073
7074 htab = ppc_elf_hash_table (info);
7075 dynobj = elf_hash_table (info)->dynobj;
7076 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7077 if (htab->is_vxworks)
7078 splt = bfd_get_section_by_name (dynobj, ".plt");
7079 else
7080 splt = NULL;
7081
7082 got = 0;
7083 if (htab->elf.hgot != NULL)
7084 got = (htab->elf.hgot->root.u.def.value
7085 + htab->elf.hgot->root.u.def.section->output_section->vma
7086 + htab->elf.hgot->root.u.def.section->output_offset);
7087
7088 if (htab->elf.dynamic_sections_created)
7089 {
7090 Elf32_External_Dyn *dyncon, *dynconend;
7091
7092 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7093
7094 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7095 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7096 for (; dyncon < dynconend; dyncon++)
7097 {
7098 Elf_Internal_Dyn dyn;
7099 asection *s;
7100
7101 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7102
7103 switch (dyn.d_tag)
7104 {
7105 case DT_PLTGOT:
7106 if (htab->is_vxworks)
7107 s = htab->sgotplt;
7108 else
7109 s = htab->plt;
7110 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7111 break;
7112
7113 case DT_PLTRELSZ:
7114 dyn.d_un.d_val = htab->relplt->size;
7115 break;
7116
7117 case DT_JMPREL:
7118 s = htab->relplt;
7119 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7120 break;
7121
7122 case DT_PPC_GOT:
7123 dyn.d_un.d_ptr = got;
7124 break;
7125
7126 case DT_RELASZ:
7127 if (htab->is_vxworks)
7128 {
7129 if (htab->relplt)
7130 dyn.d_un.d_ptr -= htab->relplt->size;
7131 break;
7132 }
7133 continue;
7134
7135 default:
7136 continue;
7137 }
7138
7139 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7140 }
7141 }
7142
7143 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7144 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7145 if (htab->got != NULL)
7146 {
7147 unsigned char *p = htab->got->contents;
7148 bfd_vma val;
7149
7150 p += htab->elf.hgot->root.u.def.value;
7151 if (htab->plt_type == PLT_OLD)
7152 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7153
7154 val = 0;
7155 if (sdyn != NULL)
7156 val = sdyn->output_section->vma + sdyn->output_offset;
7157 bfd_put_32 (output_bfd, val, p);
7158
7159 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7160 }
7161
7162 /* Fill in the first entry in the VxWorks procedure linkage table. */
7163 if (splt && splt->size > 0)
7164 {
7165 /* Use the right PLT. */
7166 static const bfd_vma *plt_entry = NULL;
7167 plt_entry = info->shared ?
7168 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7169
7170 if (!info->shared)
7171 {
7172 bfd_vma got_value =
7173 (htab->elf.hgot->root.u.def.section->output_section->vma
7174 + htab->elf.hgot->root.u.def.section->output_offset
7175 + htab->elf.hgot->root.u.def.value);
7176 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7177
7178 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7179 splt->contents + 0);
7180 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7181 splt->contents + 4);
7182 }
7183 else
7184 {
7185 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7186 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7187 }
7188 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7189 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7190 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7191 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7192 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7193 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7194
7195 if (! info->shared)
7196 {
7197 Elf_Internal_Rela rela;
7198 bfd_byte *loc;
7199
7200 loc = htab->srelplt2->contents;
7201
7202 /* Output the @ha relocation for the first instruction. */
7203 rela.r_offset = (htab->plt->output_section->vma
7204 + htab->plt->output_offset
7205 + 2);
7206 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7207 rela.r_addend = 0;
7208 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7209 loc += sizeof (Elf32_External_Rela);
7210
7211 /* Output the @l relocation for the second instruction. */
7212 rela.r_offset = (htab->plt->output_section->vma
7213 + htab->plt->output_offset
7214 + 6);
7215 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7216 rela.r_addend = 0;
7217 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7218 loc += sizeof (Elf32_External_Rela);
7219
7220 /* Fix up the remaining relocations. They may have the wrong
7221 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7222 in which symbols were output. */
7223 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7224 {
7225 Elf_Internal_Rela rel;
7226
7227 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7228 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7229 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7230 loc += sizeof (Elf32_External_Rela);
7231
7232 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7233 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7234 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7235 loc += sizeof (Elf32_External_Rela);
7236
7237 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7238 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7239 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7240 loc += sizeof (Elf32_External_Rela);
7241 }
7242 }
7243 }
7244
7245 if (htab->glink != NULL && htab->glink->contents != NULL)
7246 {
7247 unsigned char *p;
7248 unsigned char *endp;
7249 bfd_vma res0;
7250 unsigned int i;
7251
7252 /*
7253 * PIC glink code is the following:
7254 *
7255 * # ith PLT code stub.
7256 * addis 11,30,(plt+(i-1)*4-got)@ha
7257 * lwz 11,(plt+(i-1)*4-got)@l(11)
7258 * mtctr 11
7259 * bctr
7260 *
7261 * # A table of branches, one for each plt entry.
7262 * # The idea is that the plt call stub loads ctr (and r11) with these
7263 * # addresses, so (r11 - res_0) gives the plt index * 4.
7264 * res_0: b PLTresolve
7265 * res_1: b PLTresolve
7266 * .
7267 * # Some number of entries towards the end can be nops
7268 * res_n_m3: nop
7269 * res_n_m2: nop
7270 * res_n_m1:
7271 *
7272 * PLTresolve:
7273 * addis 11,11,(1f-res_0)@ha
7274 * mflr 0
7275 * bcl 20,31,1f
7276 * 1: addi 11,11,(1b-res_0)@l
7277 * mflr 12
7278 * mtlr 0
7279 * sub 11,11,12 # r11 = index * 4
7280 * addis 12,12,(got+4-1b)@ha
7281 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7282 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7283 * mtctr 0
7284 * add 0,11,11
7285 * add 11,0,11 # r11 = index * 12 = reloc offset.
7286 * bctr
7287 */
7288 static const unsigned int pic_plt_resolve[] =
7289 {
7290 ADDIS_11_11,
7291 MFLR_0,
7292 BCL_20_31,
7293 ADDI_11_11,
7294 MFLR_12,
7295 MTLR_0,
7296 SUB_11_11_12,
7297 ADDIS_12_12,
7298 LWZ_0_12,
7299 LWZ_12_12,
7300 MTCTR_0,
7301 ADD_0_11_11,
7302 ADD_11_0_11,
7303 BCTR,
7304 NOP,
7305 NOP
7306 };
7307
7308 static const unsigned int plt_resolve[] =
7309 {
7310 LIS_12,
7311 ADDIS_11_11,
7312 LWZ_0_12,
7313 ADDI_11_11,
7314 MTCTR_0,
7315 ADD_0_11_11,
7316 LWZ_12_12,
7317 ADD_11_0_11,
7318 BCTR,
7319 NOP,
7320 NOP,
7321 NOP,
7322 NOP,
7323 NOP,
7324 NOP,
7325 NOP
7326 };
7327
7328 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7329 abort ();
7330 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7331 abort ();
7332
7333 /* Build the branch table, one for each plt entry (less one),
7334 and perhaps some padding. */
7335 p = htab->glink->contents;
7336 p += htab->glink_pltresolve;
7337 endp = htab->glink->contents;
7338 endp += htab->glink->size - GLINK_PLTRESOLVE;
7339 while (p < endp - 8 * 4)
7340 {
7341 bfd_put_32 (output_bfd, B + endp - p, p);
7342 p += 4;
7343 }
7344 while (p < endp)
7345 {
7346 bfd_put_32 (output_bfd, NOP, p);
7347 p += 4;
7348 }
7349
7350 res0 = (htab->glink_pltresolve
7351 + htab->glink->output_section->vma
7352 + htab->glink->output_offset);
7353
7354 /* Last comes the PLTresolve stub. */
7355 if (info->shared || info->pie)
7356 {
7357 bfd_vma bcl;
7358
7359 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7360 {
7361 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7362 p += 4;
7363 }
7364 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7365
7366 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7367 + htab->glink->output_section->vma
7368 + htab->glink->output_offset);
7369
7370 bfd_put_32 (output_bfd,
7371 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7372 bfd_put_32 (output_bfd,
7373 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7374 bfd_put_32 (output_bfd,
7375 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7376 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7377 {
7378 bfd_put_32 (output_bfd,
7379 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7380 bfd_put_32 (output_bfd,
7381 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7382 }
7383 else
7384 {
7385 bfd_put_32 (output_bfd,
7386 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7387 bfd_put_32 (output_bfd,
7388 LWZ_12_12 + 4, p + 9*4);
7389 }
7390 }
7391 else
7392 {
7393 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7394 {
7395 bfd_put_32 (output_bfd, plt_resolve[i], p);
7396 p += 4;
7397 }
7398 p -= 4 * ARRAY_SIZE (plt_resolve);
7399
7400 bfd_put_32 (output_bfd,
7401 LIS_12 + PPC_HA (got + 4), p + 0*4);
7402 bfd_put_32 (output_bfd,
7403 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7404 bfd_put_32 (output_bfd,
7405 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7406 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7407 {
7408 bfd_put_32 (output_bfd,
7409 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7410 bfd_put_32 (output_bfd,
7411 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7412 }
7413 else
7414 {
7415 bfd_put_32 (output_bfd,
7416 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7417 bfd_put_32 (output_bfd,
7418 LWZ_12_12 + 4, p + 6*4);
7419 }
7420 }
7421 }
7422
7423 return TRUE;
7424 }
7425 \f
7426 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7427 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7428 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7429 #define TARGET_BIG_NAME "elf32-powerpc"
7430 #define ELF_ARCH bfd_arch_powerpc
7431 #define ELF_MACHINE_CODE EM_PPC
7432 #ifdef __QNXTARGET__
7433 #define ELF_MAXPAGESIZE 0x1000
7434 #else
7435 #define ELF_MAXPAGESIZE 0x10000
7436 #endif
7437 #define ELF_MINPAGESIZE 0x1000
7438 #define ELF_COMMONPAGESIZE 0x1000
7439 #define elf_info_to_howto ppc_elf_info_to_howto
7440
7441 #ifdef EM_CYGNUS_POWERPC
7442 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7443 #endif
7444
7445 #ifdef EM_PPC_OLD
7446 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7447 #endif
7448
7449 #define elf_backend_plt_not_loaded 1
7450 #define elf_backend_can_gc_sections 1
7451 #define elf_backend_can_refcount 1
7452 #define elf_backend_rela_normal 1
7453
7454 #define bfd_elf32_mkobject ppc_elf_mkobject
7455 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7456 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7457 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7458 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7459 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7460
7461 #define elf_backend_object_p ppc_elf_object_p
7462 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7463 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7464 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7465 #define elf_backend_relocate_section ppc_elf_relocate_section
7466 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7467 #define elf_backend_check_relocs ppc_elf_check_relocs
7468 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7469 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7470 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7471 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7472 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7473 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7474 #define elf_backend_fake_sections ppc_elf_fake_sections
7475 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7476 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7477 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7478 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7479 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7480 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7481 #define elf_backend_write_section ppc_elf_write_section
7482 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7483 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7484 #define elf_backend_action_discarded ppc_elf_action_discarded
7485 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7486
7487 #include "elf32-target.h"
7488
7489 /* VxWorks Target */
7490
7491 #undef TARGET_LITTLE_SYM
7492 #undef TARGET_LITTLE_NAME
7493
7494 #undef TARGET_BIG_SYM
7495 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7496 #undef TARGET_BIG_NAME
7497 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7498
7499 /* VxWorks uses the elf default section flags for .plt. */
7500 static const struct bfd_elf_special_section *
7501 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7502 {
7503 if (sec->name == NULL)
7504 return NULL;
7505
7506 if (strcmp (sec->name, ".plt") == 0)
7507 return _bfd_elf_get_sec_type_attr (abfd, sec);
7508
7509 return ppc_elf_get_sec_type_attr (abfd, sec);
7510 }
7511
7512 /* Like ppc_elf_link_hash_table_create, but overrides
7513 appropriately for VxWorks. */
7514 static struct bfd_link_hash_table *
7515 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7516 {
7517 struct bfd_link_hash_table *ret;
7518
7519 ret = ppc_elf_link_hash_table_create (abfd);
7520 if (ret)
7521 {
7522 struct ppc_elf_link_hash_table *htab
7523 = (struct ppc_elf_link_hash_table *)ret;
7524 htab->is_vxworks = 1;
7525 htab->plt_type = PLT_VXWORKS;
7526 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7527 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7528 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7529 }
7530 return ret;
7531 }
7532
7533 /* Tweak magic VxWorks symbols as they are loaded. */
7534 static bfd_boolean
7535 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7536 struct bfd_link_info *info,
7537 Elf_Internal_Sym *sym,
7538 const char **namep ATTRIBUTE_UNUSED,
7539 flagword *flagsp ATTRIBUTE_UNUSED,
7540 asection **secp,
7541 bfd_vma *valp)
7542 {
7543 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7544 valp))
7545 return FALSE;
7546
7547 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7548 }
7549
7550 static void
7551 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7552 {
7553 ppc_elf_final_write_processing(abfd, linker);
7554 elf_vxworks_final_write_processing(abfd, linker);
7555 }
7556
7557 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7558 define it. */
7559 #undef elf_backend_want_plt_sym
7560 #define elf_backend_want_plt_sym 1
7561 #undef elf_backend_want_got_plt
7562 #define elf_backend_want_got_plt 1
7563 #undef elf_backend_got_symbol_offset
7564 #define elf_backend_got_symbol_offset 0
7565 #undef elf_backend_plt_not_loaded
7566 #define elf_backend_plt_not_loaded 0
7567 #undef elf_backend_plt_readonly
7568 #define elf_backend_plt_readonly 1
7569 #undef elf_backend_got_header_size
7570 #define elf_backend_got_header_size 12
7571
7572 #undef bfd_elf32_bfd_link_hash_table_create
7573 #define bfd_elf32_bfd_link_hash_table_create \
7574 ppc_elf_vxworks_link_hash_table_create
7575 #undef elf_backend_add_symbol_hook
7576 #define elf_backend_add_symbol_hook \
7577 ppc_elf_vxworks_add_symbol_hook
7578 #undef elf_backend_link_output_symbol_hook
7579 #define elf_backend_link_output_symbol_hook \
7580 elf_vxworks_link_output_symbol_hook
7581 #undef elf_backend_final_write_processing
7582 #define elf_backend_final_write_processing \
7583 ppc_elf_vxworks_final_write_processing
7584 #undef elf_backend_get_sec_type_attr
7585 #define elf_backend_get_sec_type_attr \
7586 ppc_elf_vxworks_get_sec_type_attr
7587 #undef elf_backend_emit_relocs
7588 #define elf_backend_emit_relocs \
7589 elf_vxworks_emit_relocs
7590
7591 #undef elf32_bed
7592 #define elf32_bed ppc_elf_vxworks_bed
7593
7594 #include "elf32-target.h"
GDB Binutils - Deliverables
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