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* elf32-ppc.c (ppc_elf_check_relocs): Don't fall into REL24
[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 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 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931 \f
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211 \f
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 enum ppc_elf_plt_type {
2317 PLT_UNSET,
2318 PLT_OLD,
2319 PLT_NEW,
2320 PLT_VXWORKS
2321 };
2322
2323 /* PPC ELF linker hash table. */
2324
2325 struct ppc_elf_link_hash_table
2326 {
2327 struct elf_link_hash_table elf;
2328
2329 /* Short-cuts to get to dynamic linker sections. */
2330 asection *got;
2331 asection *relgot;
2332 asection *glink;
2333 asection *plt;
2334 asection *relplt;
2335 asection *dynbss;
2336 asection *relbss;
2337 asection *dynsbss;
2338 asection *relsbss;
2339 elf_linker_section_t sdata[2];
2340 asection *sbss;
2341
2342 /* Shortcut to .__tls_get_addr. */
2343 struct elf_link_hash_entry *tls_get_addr;
2344
2345 /* TLS local dynamic got entry handling. */
2346 union {
2347 bfd_signed_vma refcount;
2348 bfd_vma offset;
2349 } tlsld_got;
2350
2351 /* Offset of PltResolve function in glink. */
2352 bfd_vma glink_pltresolve;
2353
2354 /* Size of reserved GOT entries. */
2355 unsigned int got_header_size;
2356 /* Non-zero if allocating the header left a gap. */
2357 unsigned int got_gap;
2358
2359 /* The type of PLT we have chosen to use. */
2360 enum ppc_elf_plt_type plt_type;
2361
2362 /* Whether we can use the new PLT layout. */
2363 unsigned int can_use_new_plt:1;
2364
2365 /* Set if we should emit symbols for stubs. */
2366 unsigned int emit_stub_syms:1;
2367
2368 /* Small local sym to section mapping cache. */
2369 struct sym_sec_cache sym_sec;
2370
2371 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2372 asection *srelplt2;
2373
2374 /* The .got.plt section (VxWorks only)*/
2375 asection *sgotplt;
2376
2377 /* True if the target system is VxWorks. */
2378 int is_vxworks;
2379
2380 /* The size of PLT entries. */
2381 int plt_entry_size;
2382 /* The distance between adjacent PLT slots. */
2383 int plt_slot_size;
2384 /* The size of the first PLT entry. */
2385 int plt_initial_entry_size;
2386 };
2387
2388 /* Get the PPC ELF linker hash table from a link_info structure. */
2389
2390 #define ppc_elf_hash_table(p) \
2391 ((struct ppc_elf_link_hash_table *) (p)->hash)
2392
2393 /* Create an entry in a PPC ELF linker hash table. */
2394
2395 static struct bfd_hash_entry *
2396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2397 struct bfd_hash_table *table,
2398 const char *string)
2399 {
2400 /* Allocate the structure if it has not already been allocated by a
2401 subclass. */
2402 if (entry == NULL)
2403 {
2404 entry = bfd_hash_allocate (table,
2405 sizeof (struct ppc_elf_link_hash_entry));
2406 if (entry == NULL)
2407 return entry;
2408 }
2409
2410 /* Call the allocation method of the superclass. */
2411 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2412 if (entry != NULL)
2413 {
2414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2416 ppc_elf_hash_entry (entry)->tls_mask = 0;
2417 }
2418
2419 return entry;
2420 }
2421
2422 /* Create a PPC ELF linker hash table. */
2423
2424 static struct bfd_link_hash_table *
2425 ppc_elf_link_hash_table_create (bfd *abfd)
2426 {
2427 struct ppc_elf_link_hash_table *ret;
2428
2429 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2430 if (ret == NULL)
2431 return NULL;
2432
2433 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2434 ppc_elf_link_hash_newfunc))
2435 {
2436 free (ret);
2437 return NULL;
2438 }
2439
2440 ret->elf.init_plt_refcount.refcount = 0;
2441 ret->elf.init_plt_refcount.glist = NULL;
2442 ret->elf.init_plt_offset.offset = 0;
2443 ret->elf.init_plt_offset.glist = NULL;
2444
2445 ret->sdata[0].name = ".sdata";
2446 ret->sdata[0].sym_name = "_SDA_BASE_";
2447 ret->sdata[0].bss_name = ".sbss";
2448
2449 ret->sdata[1].name = ".sdata2";
2450 ret->sdata[1].sym_name = "_SDA2_BASE_";
2451 ret->sdata[1].bss_name = ".sbss2";
2452
2453 ret->plt_entry_size = 12;
2454 ret->plt_slot_size = 8;
2455 ret->plt_initial_entry_size = 72;
2456
2457 ret->is_vxworks = 0;
2458
2459 return &ret->elf.root;
2460 }
2461
2462 /* Create .got and the related sections. */
2463
2464 static bfd_boolean
2465 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2466 {
2467 struct ppc_elf_link_hash_table *htab;
2468 asection *s;
2469 flagword flags;
2470
2471 if (!_bfd_elf_create_got_section (abfd, info))
2472 return FALSE;
2473
2474 htab = ppc_elf_hash_table (info);
2475 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2476 if (s == NULL)
2477 abort ();
2478
2479 if (htab->is_vxworks)
2480 {
2481 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2482 if (!htab->sgotplt)
2483 abort ();
2484 }
2485 else
2486 {
2487 /* The powerpc .got has a blrl instruction in it. Mark it
2488 executable. */
2489 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2490 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2491 if (!bfd_set_section_flags (abfd, s, flags))
2492 return FALSE;
2493 }
2494
2495 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2496 | SEC_LINKER_CREATED | SEC_READONLY);
2497 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2498 if (!htab->relgot
2499 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2500 return FALSE;
2501
2502 return TRUE;
2503 }
2504
2505 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2506 to output sections (just like _bfd_elf_create_dynamic_sections has
2507 to create .dynbss and .rela.bss). */
2508
2509 static bfd_boolean
2510 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2511 {
2512 struct ppc_elf_link_hash_table *htab;
2513 asection *s;
2514 flagword flags;
2515
2516 htab = ppc_elf_hash_table (info);
2517
2518 if (htab->got == NULL
2519 && !ppc_elf_create_got (abfd, info))
2520 return FALSE;
2521
2522 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2523 return FALSE;
2524
2525 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2526 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2527
2528 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2529 htab->glink = s;
2530 if (s == NULL
2531 || !bfd_set_section_alignment (abfd, s, 4))
2532 return FALSE;
2533
2534 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2535 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2536 SEC_ALLOC | SEC_LINKER_CREATED);
2537 htab->dynsbss = s;
2538 if (s == NULL)
2539 return FALSE;
2540
2541 if (! info->shared)
2542 {
2543 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2544 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2545 htab->relsbss = s;
2546 if (s == NULL
2547 || ! bfd_set_section_alignment (abfd, s, 2))
2548 return FALSE;
2549 }
2550
2551 if (htab->is_vxworks
2552 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2553 return FALSE;
2554
2555 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2556 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2557 if (s == NULL)
2558 abort ();
2559
2560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2561 if (htab->plt_type == PLT_VXWORKS)
2562 /* The VxWorks PLT is a loaded section with contents. */
2563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2564 return bfd_set_section_flags (abfd, s, flags);
2565 }
2566
2567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2568
2569 static void
2570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2571 struct elf_link_hash_entry *dir,
2572 struct elf_link_hash_entry *ind)
2573 {
2574 struct ppc_elf_link_hash_entry *edir, *eind;
2575
2576 edir = (struct ppc_elf_link_hash_entry *) dir;
2577 eind = (struct ppc_elf_link_hash_entry *) ind;
2578
2579 if (eind->dyn_relocs != NULL)
2580 {
2581 if (edir->dyn_relocs != NULL)
2582 {
2583 struct ppc_elf_dyn_relocs **pp;
2584 struct ppc_elf_dyn_relocs *p;
2585
2586 /* Add reloc counts against the indirect sym to the direct sym
2587 list. Merge any entries against the same section. */
2588 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2589 {
2590 struct ppc_elf_dyn_relocs *q;
2591
2592 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2593 if (q->sec == p->sec)
2594 {
2595 q->pc_count += p->pc_count;
2596 q->count += p->count;
2597 *pp = p->next;
2598 break;
2599 }
2600 if (q == NULL)
2601 pp = &p->next;
2602 }
2603 *pp = edir->dyn_relocs;
2604 }
2605
2606 edir->dyn_relocs = eind->dyn_relocs;
2607 eind->dyn_relocs = NULL;
2608 }
2609
2610 edir->tls_mask |= eind->tls_mask;
2611 edir->has_sda_refs |= eind->has_sda_refs;
2612
2613 /* If called to transfer flags for a weakdef during processing
2614 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2615 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2616 if (!(ELIMINATE_COPY_RELOCS
2617 && eind->elf.root.type != bfd_link_hash_indirect
2618 && edir->elf.dynamic_adjusted))
2619 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2620
2621 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2622 edir->elf.ref_regular |= eind->elf.ref_regular;
2623 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2624 edir->elf.needs_plt |= eind->elf.needs_plt;
2625
2626 /* If we were called to copy over info for a weak sym, that's all. */
2627 if (eind->elf.root.type != bfd_link_hash_indirect)
2628 return;
2629
2630 /* Copy over the GOT refcount entries that we may have already seen to
2631 the symbol which just became indirect. */
2632 edir->elf.got.refcount += eind->elf.got.refcount;
2633 eind->elf.got.refcount = 0;
2634
2635 /* And plt entries. */
2636 if (eind->elf.plt.plist != NULL)
2637 {
2638 if (edir->elf.plt.plist != NULL)
2639 {
2640 struct plt_entry **entp;
2641 struct plt_entry *ent;
2642
2643 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2644 {
2645 struct plt_entry *dent;
2646
2647 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2648 if (dent->sec == ent->sec && dent->addend == ent->addend)
2649 {
2650 dent->plt.refcount += ent->plt.refcount;
2651 *entp = ent->next;
2652 break;
2653 }
2654 if (dent == NULL)
2655 entp = &ent->next;
2656 }
2657 *entp = edir->elf.plt.plist;
2658 }
2659
2660 edir->elf.plt.plist = eind->elf.plt.plist;
2661 eind->elf.plt.plist = NULL;
2662 }
2663
2664 if (eind->elf.dynindx != -1)
2665 {
2666 if (edir->elf.dynindx != -1)
2667 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2668 edir->elf.dynstr_index);
2669 edir->elf.dynindx = eind->elf.dynindx;
2670 edir->elf.dynstr_index = eind->elf.dynstr_index;
2671 eind->elf.dynindx = -1;
2672 eind->elf.dynstr_index = 0;
2673 }
2674 }
2675
2676 /* Return 1 if target is one of ours. */
2677
2678 static bfd_boolean
2679 is_ppc_elf_target (const struct bfd_target *targ)
2680 {
2681 extern const bfd_target bfd_elf32_powerpc_vec;
2682 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2683 extern const bfd_target bfd_elf32_powerpcle_vec;
2684
2685 return (targ == &bfd_elf32_powerpc_vec
2686 || targ == &bfd_elf32_powerpc_vxworks_vec
2687 || targ == &bfd_elf32_powerpcle_vec);
2688 }
2689
2690 /* Hook called by the linker routine which adds symbols from an object
2691 file. We use it to put .comm items in .sbss, and not .bss. */
2692
2693 static bfd_boolean
2694 ppc_elf_add_symbol_hook (bfd *abfd,
2695 struct bfd_link_info *info,
2696 Elf_Internal_Sym *sym,
2697 const char **namep ATTRIBUTE_UNUSED,
2698 flagword *flagsp ATTRIBUTE_UNUSED,
2699 asection **secp,
2700 bfd_vma *valp)
2701 {
2702 if (sym->st_shndx == SHN_COMMON
2703 && !info->relocatable
2704 && sym->st_size <= elf_gp_size (abfd)
2705 && is_ppc_elf_target (info->hash->creator))
2706 {
2707 /* Common symbols less than or equal to -G nn bytes are automatically
2708 put into .sbss. */
2709 struct ppc_elf_link_hash_table *htab;
2710
2711 htab = ppc_elf_hash_table (info);
2712 if (htab->sbss == NULL)
2713 {
2714 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2715
2716 if (!htab->elf.dynobj)
2717 htab->elf.dynobj = abfd;
2718
2719 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2720 ".sbss",
2721 flags);
2722 if (htab->sbss == NULL)
2723 return FALSE;
2724 }
2725
2726 *secp = htab->sbss;
2727 *valp = sym->st_size;
2728 }
2729
2730 return TRUE;
2731 }
2732 \f
2733 static bfd_boolean
2734 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2735 elf_linker_section_t *lsect)
2736 {
2737 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2738 TRUE, FALSE, TRUE);
2739 if (lsect->sym == NULL)
2740 return FALSE;
2741 if (lsect->sym->root.type == bfd_link_hash_new)
2742 lsect->sym->non_elf = 0;
2743 lsect->sym->ref_regular = 1;
2744 return TRUE;
2745 }
2746
2747 /* Create a special linker section. */
2748
2749 static bfd_boolean
2750 ppc_elf_create_linker_section (bfd *abfd,
2751 struct bfd_link_info *info,
2752 flagword flags,
2753 elf_linker_section_t *lsect)
2754 {
2755 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2756 asection *s;
2757
2758 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2759 | SEC_LINKER_CREATED);
2760
2761 /* Record the first bfd that needs the special sections. */
2762 if (!htab->elf.dynobj)
2763 htab->elf.dynobj = abfd;
2764
2765 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2766 lsect->name,
2767 flags);
2768 if (s == NULL
2769 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2770 return FALSE;
2771 lsect->section = s;
2772
2773 return create_sdata_sym (htab, lsect);
2774 }
2775
2776 /* Find a linker generated pointer with a given addend and type. */
2777
2778 static elf_linker_section_pointers_t *
2779 elf_find_pointer_linker_section
2780 (elf_linker_section_pointers_t *linker_pointers,
2781 bfd_vma addend,
2782 elf_linker_section_t *lsect)
2783 {
2784 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2785 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2786 return linker_pointers;
2787
2788 return NULL;
2789 }
2790
2791 /* Allocate a pointer to live in a linker created section. */
2792
2793 static bfd_boolean
2794 elf_create_pointer_linker_section (bfd *abfd,
2795 elf_linker_section_t *lsect,
2796 struct elf_link_hash_entry *h,
2797 const Elf_Internal_Rela *rel)
2798 {
2799 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2800 elf_linker_section_pointers_t *linker_section_ptr;
2801 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2802 bfd_size_type amt;
2803
2804 BFD_ASSERT (lsect != NULL);
2805
2806 /* Is this a global symbol? */
2807 if (h != NULL)
2808 {
2809 struct ppc_elf_link_hash_entry *eh;
2810
2811 /* Has this symbol already been allocated? If so, our work is done. */
2812 eh = (struct ppc_elf_link_hash_entry *) h;
2813 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2814 rel->r_addend,
2815 lsect))
2816 return TRUE;
2817
2818 ptr_linker_section_ptr = &eh->linker_section_pointer;
2819 }
2820 else
2821 {
2822 /* Allocation of a pointer to a local symbol. */
2823 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2824
2825 /* Allocate a table to hold the local symbols if first time. */
2826 if (!ptr)
2827 {
2828 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2829
2830 amt = num_symbols;
2831 amt *= sizeof (elf_linker_section_pointers_t *);
2832 ptr = bfd_zalloc (abfd, amt);
2833
2834 if (!ptr)
2835 return FALSE;
2836
2837 elf_local_ptr_offsets (abfd) = ptr;
2838 }
2839
2840 /* Has this symbol already been allocated? If so, our work is done. */
2841 if (elf_find_pointer_linker_section (ptr[r_symndx],
2842 rel->r_addend,
2843 lsect))
2844 return TRUE;
2845
2846 ptr_linker_section_ptr = &ptr[r_symndx];
2847 }
2848
2849 /* Allocate space for a pointer in the linker section, and allocate
2850 a new pointer record from internal memory. */
2851 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2852 amt = sizeof (elf_linker_section_pointers_t);
2853 linker_section_ptr = bfd_alloc (abfd, amt);
2854
2855 if (!linker_section_ptr)
2856 return FALSE;
2857
2858 linker_section_ptr->next = *ptr_linker_section_ptr;
2859 linker_section_ptr->addend = rel->r_addend;
2860 linker_section_ptr->lsect = lsect;
2861 *ptr_linker_section_ptr = linker_section_ptr;
2862
2863 linker_section_ptr->offset = lsect->section->size;
2864 lsect->section->size += 4;
2865
2866 #ifdef DEBUG
2867 fprintf (stderr,
2868 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2869 lsect->name, (long) linker_section_ptr->offset,
2870 (long) lsect->section->size);
2871 #endif
2872
2873 return TRUE;
2874 }
2875
2876 static bfd_boolean
2877 update_local_sym_info (bfd *abfd,
2878 Elf_Internal_Shdr *symtab_hdr,
2879 unsigned long r_symndx,
2880 int tls_type)
2881 {
2882 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2883 char *local_got_tls_masks;
2884
2885 if (local_got_refcounts == NULL)
2886 {
2887 bfd_size_type size = symtab_hdr->sh_info;
2888
2889 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2890 local_got_refcounts = bfd_zalloc (abfd, size);
2891 if (local_got_refcounts == NULL)
2892 return FALSE;
2893 elf_local_got_refcounts (abfd) = local_got_refcounts;
2894 }
2895
2896 local_got_refcounts[r_symndx] += 1;
2897 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2898 local_got_tls_masks[r_symndx] |= tls_type;
2899 return TRUE;
2900 }
2901
2902 static bfd_boolean
2903 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2904 asection *sec, bfd_vma addend)
2905 {
2906 struct plt_entry *ent;
2907
2908 if (addend < 32768)
2909 sec = NULL;
2910 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2911 if (ent->sec == sec && ent->addend == addend)
2912 break;
2913 if (ent == NULL)
2914 {
2915 bfd_size_type amt = sizeof (*ent);
2916 ent = bfd_alloc (abfd, amt);
2917 if (ent == NULL)
2918 return FALSE;
2919 ent->next = h->plt.plist;
2920 ent->sec = sec;
2921 ent->addend = addend;
2922 ent->plt.refcount = 0;
2923 h->plt.plist = ent;
2924 }
2925 ent->plt.refcount += 1;
2926 return TRUE;
2927 }
2928
2929 static struct plt_entry *
2930 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2931 {
2932 struct plt_entry *ent;
2933
2934 if (addend < 32768)
2935 sec = NULL;
2936 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2937 if (ent->sec == sec && ent->addend == addend)
2938 break;
2939 return ent;
2940 }
2941
2942 static void
2943 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2944 {
2945 (*_bfd_error_handler)
2946 (_("%B: relocation %s cannot be used when making a shared object"),
2947 abfd,
2948 ppc_elf_howto_table[r_type]->name);
2949 bfd_set_error (bfd_error_bad_value);
2950 }
2951
2952 /* Look through the relocs for a section during the first phase, and
2953 allocate space in the global offset table or procedure linkage
2954 table. */
2955
2956 static bfd_boolean
2957 ppc_elf_check_relocs (bfd *abfd,
2958 struct bfd_link_info *info,
2959 asection *sec,
2960 const Elf_Internal_Rela *relocs)
2961 {
2962 struct ppc_elf_link_hash_table *htab;
2963 Elf_Internal_Shdr *symtab_hdr;
2964 struct elf_link_hash_entry **sym_hashes;
2965 const Elf_Internal_Rela *rel;
2966 const Elf_Internal_Rela *rel_end;
2967 asection *got2, *sreloc;
2968
2969 if (info->relocatable)
2970 return TRUE;
2971
2972 /* Don't do anything special with non-loaded, non-alloced sections.
2973 In particular, any relocs in such sections should not affect GOT
2974 and PLT reference counting (ie. we don't allow them to create GOT
2975 or PLT entries), there's no possibility or desire to optimize TLS
2976 relocs, and there's not much point in propagating relocs to shared
2977 libs that the dynamic linker won't relocate. */
2978 if ((sec->flags & SEC_ALLOC) == 0)
2979 return TRUE;
2980
2981 #ifdef DEBUG
2982 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2983 sec, abfd);
2984 #endif
2985
2986 /* Initialize howto table if not already done. */
2987 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2988 ppc_elf_howto_init ();
2989
2990 htab = ppc_elf_hash_table (info);
2991 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2992 sym_hashes = elf_sym_hashes (abfd);
2993 got2 = bfd_get_section_by_name (abfd, ".got2");
2994 sreloc = NULL;
2995
2996 rel_end = relocs + sec->reloc_count;
2997 for (rel = relocs; rel < rel_end; rel++)
2998 {
2999 unsigned long r_symndx;
3000 enum elf_ppc_reloc_type r_type;
3001 struct elf_link_hash_entry *h;
3002 int tls_type = 0;
3003
3004 r_symndx = ELF32_R_SYM (rel->r_info);
3005 if (r_symndx < symtab_hdr->sh_info)
3006 h = NULL;
3007 else
3008 {
3009 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3010 while (h->root.type == bfd_link_hash_indirect
3011 || h->root.type == bfd_link_hash_warning)
3012 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3013 }
3014
3015 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3016 This shows up in particular in an R_PPC_ADDR32 in the eabi
3017 startup code. */
3018 if (h != NULL
3019 && htab->got == NULL
3020 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3021 {
3022 if (htab->elf.dynobj == NULL)
3023 htab->elf.dynobj = abfd;
3024 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3025 return FALSE;
3026 BFD_ASSERT (h == htab->elf.hgot);
3027 }
3028
3029 r_type = ELF32_R_TYPE (rel->r_info);
3030 switch (r_type)
3031 {
3032 case R_PPC_GOT_TLSLD16:
3033 case R_PPC_GOT_TLSLD16_LO:
3034 case R_PPC_GOT_TLSLD16_HI:
3035 case R_PPC_GOT_TLSLD16_HA:
3036 htab->tlsld_got.refcount += 1;
3037 tls_type = TLS_TLS | TLS_LD;
3038 goto dogottls;
3039
3040 case R_PPC_GOT_TLSGD16:
3041 case R_PPC_GOT_TLSGD16_LO:
3042 case R_PPC_GOT_TLSGD16_HI:
3043 case R_PPC_GOT_TLSGD16_HA:
3044 tls_type = TLS_TLS | TLS_GD;
3045 goto dogottls;
3046
3047 case R_PPC_GOT_TPREL16:
3048 case R_PPC_GOT_TPREL16_LO:
3049 case R_PPC_GOT_TPREL16_HI:
3050 case R_PPC_GOT_TPREL16_HA:
3051 if (info->shared)
3052 info->flags |= DF_STATIC_TLS;
3053 tls_type = TLS_TLS | TLS_TPREL;
3054 goto dogottls;
3055
3056 case R_PPC_GOT_DTPREL16:
3057 case R_PPC_GOT_DTPREL16_LO:
3058 case R_PPC_GOT_DTPREL16_HI:
3059 case R_PPC_GOT_DTPREL16_HA:
3060 tls_type = TLS_TLS | TLS_DTPREL;
3061 dogottls:
3062 sec->has_tls_reloc = 1;
3063 /* Fall thru */
3064
3065 /* GOT16 relocations */
3066 case R_PPC_GOT16:
3067 case R_PPC_GOT16_LO:
3068 case R_PPC_GOT16_HI:
3069 case R_PPC_GOT16_HA:
3070 /* This symbol requires a global offset table entry. */
3071 if (htab->got == NULL)
3072 {
3073 if (htab->elf.dynobj == NULL)
3074 htab->elf.dynobj = abfd;
3075 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3076 return FALSE;
3077 }
3078 if (h != NULL)
3079 {
3080 h->got.refcount += 1;
3081 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3082 }
3083 else
3084 /* This is a global offset table entry for a local symbol. */
3085 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3086 return FALSE;
3087 break;
3088
3089 /* Indirect .sdata relocation. */
3090 case R_PPC_EMB_SDAI16:
3091 if (info->shared)
3092 {
3093 bad_shared_reloc (abfd, r_type);
3094 return FALSE;
3095 }
3096 if (htab->sdata[0].section == NULL
3097 && !ppc_elf_create_linker_section (abfd, info, 0,
3098 &htab->sdata[0]))
3099 return FALSE;
3100 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3101 h, rel))
3102 return FALSE;
3103 if (h != NULL)
3104 {
3105 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3106 h->non_got_ref = TRUE;
3107 }
3108 break;
3109
3110 /* Indirect .sdata2 relocation. */
3111 case R_PPC_EMB_SDA2I16:
3112 if (info->shared)
3113 {
3114 bad_shared_reloc (abfd, r_type);
3115 return FALSE;
3116 }
3117 if (htab->sdata[1].section == NULL
3118 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3119 &htab->sdata[1]))
3120 return FALSE;
3121 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3122 h, rel))
3123 return FALSE;
3124 if (h != NULL)
3125 {
3126 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3127 h->non_got_ref = TRUE;
3128 }
3129 break;
3130
3131 case R_PPC_SDAREL16:
3132 if (info->shared)
3133 {
3134 bad_shared_reloc (abfd, r_type);
3135 return FALSE;
3136 }
3137 if (htab->sdata[0].sym == NULL
3138 && !create_sdata_sym (htab, &htab->sdata[0]))
3139 return FALSE;
3140 if (h != NULL)
3141 {
3142 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3143 h->non_got_ref = TRUE;
3144 }
3145 break;
3146
3147 case R_PPC_EMB_SDA2REL:
3148 if (info->shared)
3149 {
3150 bad_shared_reloc (abfd, r_type);
3151 return FALSE;
3152 }
3153 if (htab->sdata[1].sym == NULL
3154 && !create_sdata_sym (htab, &htab->sdata[1]))
3155 return FALSE;
3156 if (h != NULL)
3157 {
3158 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3159 h->non_got_ref = TRUE;
3160 }
3161 break;
3162
3163 case R_PPC_EMB_SDA21:
3164 case R_PPC_EMB_RELSDA:
3165 if (info->shared)
3166 {
3167 bad_shared_reloc (abfd, r_type);
3168 return FALSE;
3169 }
3170 if (htab->sdata[0].sym == NULL
3171 && !create_sdata_sym (htab, &htab->sdata[0]))
3172 return FALSE;
3173 if (htab->sdata[1].sym == NULL
3174 && !create_sdata_sym (htab, &htab->sdata[1]))
3175 return FALSE;
3176 if (h != NULL)
3177 {
3178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3179 h->non_got_ref = TRUE;
3180 }
3181 break;
3182
3183 case R_PPC_EMB_NADDR32:
3184 case R_PPC_EMB_NADDR16:
3185 case R_PPC_EMB_NADDR16_LO:
3186 case R_PPC_EMB_NADDR16_HI:
3187 case R_PPC_EMB_NADDR16_HA:
3188 if (info->shared)
3189 {
3190 bad_shared_reloc (abfd, r_type);
3191 return FALSE;
3192 }
3193 if (h != NULL)
3194 h->non_got_ref = TRUE;
3195 break;
3196
3197 case R_PPC_PLT32:
3198 case R_PPC_PLTREL24:
3199 case R_PPC_PLTREL32:
3200 case R_PPC_PLT16_LO:
3201 case R_PPC_PLT16_HI:
3202 case R_PPC_PLT16_HA:
3203 #ifdef DEBUG
3204 fprintf (stderr, "Reloc requires a PLT entry\n");
3205 #endif
3206 /* This symbol requires a procedure linkage table entry. We
3207 actually build the entry in finish_dynamic_symbol,
3208 because this might be a case of linking PIC code without
3209 linking in any dynamic objects, in which case we don't
3210 need to generate a procedure linkage table after all. */
3211
3212 if (h == NULL)
3213 {
3214 /* It does not make sense to have a procedure linkage
3215 table entry for a local symbol. */
3216 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3217 "local symbol"),
3218 abfd,
3219 sec,
3220 (long) rel->r_offset,
3221 ppc_elf_howto_table[r_type]->name);
3222 bfd_set_error (bfd_error_bad_value);
3223 return FALSE;
3224 }
3225 else
3226 {
3227 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3228
3229 h->needs_plt = 1;
3230 if (!update_plt_info (abfd, h, got2, addend))
3231 return FALSE;
3232 }
3233 break;
3234
3235 /* The following relocations don't need to propagate the
3236 relocation if linking a shared object since they are
3237 section relative. */
3238 case R_PPC_SECTOFF:
3239 case R_PPC_SECTOFF_LO:
3240 case R_PPC_SECTOFF_HI:
3241 case R_PPC_SECTOFF_HA:
3242 case R_PPC_DTPREL16:
3243 case R_PPC_DTPREL16_LO:
3244 case R_PPC_DTPREL16_HI:
3245 case R_PPC_DTPREL16_HA:
3246 case R_PPC_TOC16:
3247 break;
3248
3249 case R_PPC_REL16:
3250 case R_PPC_REL16_LO:
3251 case R_PPC_REL16_HI:
3252 case R_PPC_REL16_HA:
3253 htab->can_use_new_plt = 1;
3254 break;
3255
3256 /* These are just markers. */
3257 case R_PPC_TLS:
3258 case R_PPC_EMB_MRKREF:
3259 case R_PPC_NONE:
3260 case R_PPC_max:
3261 break;
3262
3263 /* These should only appear in dynamic objects. */
3264 case R_PPC_COPY:
3265 case R_PPC_GLOB_DAT:
3266 case R_PPC_JMP_SLOT:
3267 case R_PPC_RELATIVE:
3268 break;
3269
3270 /* These aren't handled yet. We'll report an error later. */
3271 case R_PPC_ADDR30:
3272 case R_PPC_EMB_RELSEC16:
3273 case R_PPC_EMB_RELST_LO:
3274 case R_PPC_EMB_RELST_HI:
3275 case R_PPC_EMB_RELST_HA:
3276 case R_PPC_EMB_BIT_FLD:
3277 break;
3278
3279 /* This refers only to functions defined in the shared library. */
3280 case R_PPC_LOCAL24PC:
3281 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3282 htab->plt_type = PLT_OLD;
3283 break;
3284
3285 /* This relocation describes the C++ object vtable hierarchy.
3286 Reconstruct it for later use during GC. */
3287 case R_PPC_GNU_VTINHERIT:
3288 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3289 return FALSE;
3290 break;
3291
3292 /* This relocation describes which C++ vtable entries are actually
3293 used. Record for later use during GC. */
3294 case R_PPC_GNU_VTENTRY:
3295 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3296 return FALSE;
3297 break;
3298
3299 /* We shouldn't really be seeing these. */
3300 case R_PPC_TPREL32:
3301 if (info->shared)
3302 info->flags |= DF_STATIC_TLS;
3303 goto dodyn;
3304
3305 /* Nor these. */
3306 case R_PPC_DTPMOD32:
3307 case R_PPC_DTPREL32:
3308 goto dodyn;
3309
3310 case R_PPC_TPREL16:
3311 case R_PPC_TPREL16_LO:
3312 case R_PPC_TPREL16_HI:
3313 case R_PPC_TPREL16_HA:
3314 if (info->shared)
3315 info->flags |= DF_STATIC_TLS;
3316 goto dodyn;
3317
3318 case R_PPC_REL32:
3319 if (h == NULL
3320 && got2 != NULL
3321 && (sec->flags & SEC_CODE) != 0
3322 && (info->shared || info->pie)
3323 && htab->plt_type == PLT_UNSET)
3324 {
3325 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3326 the start of a function, which assembles to a REL32
3327 reference to .got2. If we detect one of these, then
3328 force the old PLT layout because the linker cannot
3329 reliably deduce the GOT pointer value needed for
3330 PLT call stubs. */
3331 asection *s;
3332
3333 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3334 r_symndx);
3335 if (s == got2)
3336 htab->plt_type = PLT_OLD;
3337 }
3338 if (h == NULL)
3339 break;
3340 goto dodyn;
3341
3342 case R_PPC_REL24:
3343 case R_PPC_REL14:
3344 case R_PPC_REL14_BRTAKEN:
3345 case R_PPC_REL14_BRNTAKEN:
3346 if (h == NULL)
3347 break;
3348 if (h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3349 {
3350 htab->plt_type = PLT_OLD;
3351 break;
3352 }
3353 /* fall through */
3354
3355 case R_PPC_ADDR32:
3356 case R_PPC_ADDR24:
3357 case R_PPC_ADDR16:
3358 case R_PPC_ADDR16_LO:
3359 case R_PPC_ADDR16_HI:
3360 case R_PPC_ADDR16_HA:
3361 case R_PPC_ADDR14:
3362 case R_PPC_ADDR14_BRTAKEN:
3363 case R_PPC_ADDR14_BRNTAKEN:
3364 case R_PPC_UADDR32:
3365 case R_PPC_UADDR16:
3366 if (h != NULL && !info->shared)
3367 {
3368 /* We may need a plt entry if the symbol turns out to be
3369 a function defined in a dynamic object. */
3370 if (!update_plt_info (abfd, h, NULL, 0))
3371 return FALSE;
3372
3373 /* We may need a copy reloc too. */
3374 h->non_got_ref = 1;
3375 }
3376
3377 dodyn:
3378 /* If we are creating a shared library, and this is a reloc
3379 against a global symbol, or a non PC relative reloc
3380 against a local symbol, then we need to copy the reloc
3381 into the shared library. However, if we are linking with
3382 -Bsymbolic, we do not need to copy a reloc against a
3383 global symbol which is defined in an object we are
3384 including in the link (i.e., DEF_REGULAR is set). At
3385 this point we have not seen all the input files, so it is
3386 possible that DEF_REGULAR is not set now but will be set
3387 later (it is never cleared). In case of a weak definition,
3388 DEF_REGULAR may be cleared later by a strong definition in
3389 a shared library. We account for that possibility below by
3390 storing information in the dyn_relocs field of the hash
3391 table entry. A similar situation occurs when creating
3392 shared libraries and symbol visibility changes render the
3393 symbol local.
3394
3395 If on the other hand, we are creating an executable, we
3396 may need to keep relocations for symbols satisfied by a
3397 dynamic library if we manage to avoid copy relocs for the
3398 symbol. */
3399 if ((info->shared
3400 && (MUST_BE_DYN_RELOC (r_type)
3401 || (h != NULL
3402 && (! info->symbolic
3403 || h->root.type == bfd_link_hash_defweak
3404 || !h->def_regular))))
3405 || (ELIMINATE_COPY_RELOCS
3406 && !info->shared
3407 && h != NULL
3408 && (h->root.type == bfd_link_hash_defweak
3409 || !h->def_regular)))
3410 {
3411 struct ppc_elf_dyn_relocs *p;
3412 struct ppc_elf_dyn_relocs **head;
3413
3414 #ifdef DEBUG
3415 fprintf (stderr,
3416 "ppc_elf_check_relocs needs to "
3417 "create relocation for %s\n",
3418 (h && h->root.root.string
3419 ? h->root.root.string : "<unknown>"));
3420 #endif
3421 if (sreloc == NULL)
3422 {
3423 const char *name;
3424
3425 name = (bfd_elf_string_from_elf_section
3426 (abfd,
3427 elf_elfheader (abfd)->e_shstrndx,
3428 elf_section_data (sec)->rel_hdr.sh_name));
3429 if (name == NULL)
3430 return FALSE;
3431
3432 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3433 && strcmp (bfd_get_section_name (abfd, sec),
3434 name + 5) == 0);
3435
3436 if (htab->elf.dynobj == NULL)
3437 htab->elf.dynobj = abfd;
3438 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3439 if (sreloc == NULL)
3440 {
3441 flagword flags;
3442
3443 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3444 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3445 | SEC_ALLOC | SEC_LOAD);
3446 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3447 name,
3448 flags);
3449 if (sreloc == NULL
3450 || ! bfd_set_section_alignment (htab->elf.dynobj,
3451 sreloc, 2))
3452 return FALSE;
3453 }
3454 elf_section_data (sec)->sreloc = sreloc;
3455 }
3456
3457 /* If this is a global symbol, we count the number of
3458 relocations we need for this symbol. */
3459 if (h != NULL)
3460 {
3461 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3462 }
3463 else
3464 {
3465 /* Track dynamic relocs needed for local syms too.
3466 We really need local syms available to do this
3467 easily. Oh well. */
3468
3469 asection *s;
3470 void *vpp;
3471
3472 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3473 sec, r_symndx);
3474 if (s == NULL)
3475 return FALSE;
3476
3477 vpp = &elf_section_data (s)->local_dynrel;
3478 head = (struct ppc_elf_dyn_relocs **) vpp;
3479 }
3480
3481 p = *head;
3482 if (p == NULL || p->sec != sec)
3483 {
3484 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3485 if (p == NULL)
3486 return FALSE;
3487 p->next = *head;
3488 *head = p;
3489 p->sec = sec;
3490 p->count = 0;
3491 p->pc_count = 0;
3492 }
3493
3494 p->count += 1;
3495 if (!MUST_BE_DYN_RELOC (r_type))
3496 p->pc_count += 1;
3497 }
3498
3499 break;
3500 }
3501 }
3502
3503 return TRUE;
3504 }
3505 \f
3506 /* Merge backend specific data from an object file to the output
3507 object file when linking. */
3508
3509 static bfd_boolean
3510 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3511 {
3512 flagword old_flags;
3513 flagword new_flags;
3514 bfd_boolean error;
3515
3516 if (!is_ppc_elf_target (ibfd->xvec)
3517 || !is_ppc_elf_target (obfd->xvec))
3518 return TRUE;
3519
3520 /* Check if we have the same endianess. */
3521 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3522 return FALSE;
3523
3524 new_flags = elf_elfheader (ibfd)->e_flags;
3525 old_flags = elf_elfheader (obfd)->e_flags;
3526 if (!elf_flags_init (obfd))
3527 {
3528 /* First call, no flags set. */
3529 elf_flags_init (obfd) = TRUE;
3530 elf_elfheader (obfd)->e_flags = new_flags;
3531 }
3532
3533 /* Compatible flags are ok. */
3534 else if (new_flags == old_flags)
3535 ;
3536
3537 /* Incompatible flags. */
3538 else
3539 {
3540 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3541 to be linked with either. */
3542 error = FALSE;
3543 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3544 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3545 {
3546 error = TRUE;
3547 (*_bfd_error_handler)
3548 (_("%B: compiled with -mrelocatable and linked with "
3549 "modules compiled normally"), ibfd);
3550 }
3551 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3552 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3553 {
3554 error = TRUE;
3555 (*_bfd_error_handler)
3556 (_("%B: compiled normally and linked with "
3557 "modules compiled with -mrelocatable"), ibfd);
3558 }
3559
3560 /* The output is -mrelocatable-lib iff both the input files are. */
3561 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3562 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3563
3564 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3565 but each input file is either -mrelocatable or -mrelocatable-lib. */
3566 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3567 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3568 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3569 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3570
3571 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3572 any module uses it. */
3573 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3574
3575 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3576 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3577
3578 /* Warn about any other mismatches. */
3579 if (new_flags != old_flags)
3580 {
3581 error = TRUE;
3582 (*_bfd_error_handler)
3583 (_("%B: uses different e_flags (0x%lx) fields "
3584 "than previous modules (0x%lx)"),
3585 ibfd, (long) new_flags, (long) old_flags);
3586 }
3587
3588 if (error)
3589 {
3590 bfd_set_error (bfd_error_bad_value);
3591 return FALSE;
3592 }
3593 }
3594
3595 return TRUE;
3596 }
3597 \f
3598 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3599 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3600 int
3601 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3602 struct bfd_link_info *info,
3603 int force_old_plt,
3604 int emit_stub_syms)
3605 {
3606 struct ppc_elf_link_hash_table *htab;
3607 flagword flags;
3608
3609 htab = ppc_elf_hash_table (info);
3610
3611 if (htab->plt_type == PLT_UNSET)
3612 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3613 ? PLT_OLD : PLT_NEW);
3614
3615 htab->emit_stub_syms = emit_stub_syms;
3616
3617 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3618
3619 if (htab->plt_type == PLT_NEW)
3620 {
3621 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3622 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3623
3624 /* The new PLT is a loaded section. */
3625 if (htab->plt != NULL
3626 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3627 return -1;
3628
3629 /* The new GOT is not executable. */
3630 if (htab->got != NULL
3631 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3632 return -1;
3633 }
3634 else
3635 {
3636 /* Stop an unused .glink section from affecting .text alignment. */
3637 if (htab->glink != NULL
3638 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3639 return -1;
3640 }
3641 return htab->plt_type == PLT_NEW;
3642 }
3643 \f
3644 /* Return the section that should be marked against GC for a given
3645 relocation. */
3646
3647 static asection *
3648 ppc_elf_gc_mark_hook (asection *sec,
3649 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3650 Elf_Internal_Rela *rel,
3651 struct elf_link_hash_entry *h,
3652 Elf_Internal_Sym *sym)
3653 {
3654 if (h != NULL)
3655 {
3656 switch (ELF32_R_TYPE (rel->r_info))
3657 {
3658 case R_PPC_GNU_VTINHERIT:
3659 case R_PPC_GNU_VTENTRY:
3660 break;
3661
3662 default:
3663 switch (h->root.type)
3664 {
3665 case bfd_link_hash_defined:
3666 case bfd_link_hash_defweak:
3667 return h->root.u.def.section;
3668
3669 case bfd_link_hash_common:
3670 return h->root.u.c.p->section;
3671
3672 default:
3673 break;
3674 }
3675 }
3676 }
3677 else
3678 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3679
3680 return NULL;
3681 }
3682
3683 /* Update the got, plt and dynamic reloc reference counts for the
3684 section being removed. */
3685
3686 static bfd_boolean
3687 ppc_elf_gc_sweep_hook (bfd *abfd,
3688 struct bfd_link_info *info,
3689 asection *sec,
3690 const Elf_Internal_Rela *relocs)
3691 {
3692 struct ppc_elf_link_hash_table *htab;
3693 Elf_Internal_Shdr *symtab_hdr;
3694 struct elf_link_hash_entry **sym_hashes;
3695 bfd_signed_vma *local_got_refcounts;
3696 const Elf_Internal_Rela *rel, *relend;
3697 asection *got2;
3698
3699 if ((sec->flags & SEC_ALLOC) == 0)
3700 return TRUE;
3701
3702 elf_section_data (sec)->local_dynrel = NULL;
3703
3704 htab = ppc_elf_hash_table (info);
3705 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3706 sym_hashes = elf_sym_hashes (abfd);
3707 local_got_refcounts = elf_local_got_refcounts (abfd);
3708 got2 = bfd_get_section_by_name (abfd, ".got2");
3709
3710 relend = relocs + sec->reloc_count;
3711 for (rel = relocs; rel < relend; rel++)
3712 {
3713 unsigned long r_symndx;
3714 enum elf_ppc_reloc_type r_type;
3715 struct elf_link_hash_entry *h = NULL;
3716
3717 r_symndx = ELF32_R_SYM (rel->r_info);
3718 if (r_symndx >= symtab_hdr->sh_info)
3719 {
3720 struct ppc_elf_dyn_relocs **pp, *p;
3721 struct ppc_elf_link_hash_entry *eh;
3722
3723 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3724 while (h->root.type == bfd_link_hash_indirect
3725 || h->root.type == bfd_link_hash_warning)
3726 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3727 eh = (struct ppc_elf_link_hash_entry *) h;
3728
3729 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3730 if (p->sec == sec)
3731 {
3732 /* Everything must go for SEC. */
3733 *pp = p->next;
3734 break;
3735 }
3736 }
3737
3738 r_type = ELF32_R_TYPE (rel->r_info);
3739 switch (r_type)
3740 {
3741 case R_PPC_GOT_TLSLD16:
3742 case R_PPC_GOT_TLSLD16_LO:
3743 case R_PPC_GOT_TLSLD16_HI:
3744 case R_PPC_GOT_TLSLD16_HA:
3745 htab->tlsld_got.refcount -= 1;
3746 /* Fall thru */
3747
3748 case R_PPC_GOT_TLSGD16:
3749 case R_PPC_GOT_TLSGD16_LO:
3750 case R_PPC_GOT_TLSGD16_HI:
3751 case R_PPC_GOT_TLSGD16_HA:
3752 case R_PPC_GOT_TPREL16:
3753 case R_PPC_GOT_TPREL16_LO:
3754 case R_PPC_GOT_TPREL16_HI:
3755 case R_PPC_GOT_TPREL16_HA:
3756 case R_PPC_GOT_DTPREL16:
3757 case R_PPC_GOT_DTPREL16_LO:
3758 case R_PPC_GOT_DTPREL16_HI:
3759 case R_PPC_GOT_DTPREL16_HA:
3760 case R_PPC_GOT16:
3761 case R_PPC_GOT16_LO:
3762 case R_PPC_GOT16_HI:
3763 case R_PPC_GOT16_HA:
3764 if (h != NULL)
3765 {
3766 if (h->got.refcount > 0)
3767 h->got.refcount--;
3768 }
3769 else if (local_got_refcounts != NULL)
3770 {
3771 if (local_got_refcounts[r_symndx] > 0)
3772 local_got_refcounts[r_symndx]--;
3773 }
3774 break;
3775
3776 case R_PPC_REL24:
3777 case R_PPC_REL14:
3778 case R_PPC_REL14_BRTAKEN:
3779 case R_PPC_REL14_BRNTAKEN:
3780 case R_PPC_REL32:
3781 if (h == NULL || h == htab->elf.hgot)
3782 break;
3783 /* Fall thru */
3784
3785 case R_PPC_ADDR32:
3786 case R_PPC_ADDR24:
3787 case R_PPC_ADDR16:
3788 case R_PPC_ADDR16_LO:
3789 case R_PPC_ADDR16_HI:
3790 case R_PPC_ADDR16_HA:
3791 case R_PPC_ADDR14:
3792 case R_PPC_ADDR14_BRTAKEN:
3793 case R_PPC_ADDR14_BRNTAKEN:
3794 case R_PPC_UADDR32:
3795 case R_PPC_UADDR16:
3796 if (info->shared)
3797 break;
3798
3799 case R_PPC_PLT32:
3800 case R_PPC_PLTREL24:
3801 case R_PPC_PLTREL32:
3802 case R_PPC_PLT16_LO:
3803 case R_PPC_PLT16_HI:
3804 case R_PPC_PLT16_HA:
3805 if (h != NULL)
3806 {
3807 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3808 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3809 if (ent->plt.refcount > 0)
3810 ent->plt.refcount -= 1;
3811 }
3812 break;
3813
3814 default:
3815 break;
3816 }
3817 }
3818 return TRUE;
3819 }
3820 \f
3821 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3822
3823 asection *
3824 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3825 {
3826 struct ppc_elf_link_hash_table *htab;
3827
3828 htab = ppc_elf_hash_table (info);
3829 if (htab->plt_type == PLT_NEW
3830 && htab->plt != NULL
3831 && htab->plt->output_section != NULL)
3832 {
3833 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3834 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3835 }
3836
3837 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3838 FALSE, FALSE, TRUE);
3839 return _bfd_elf_tls_setup (obfd, info);
3840 }
3841
3842 /* Run through all the TLS relocs looking for optimization
3843 opportunities. */
3844
3845 bfd_boolean
3846 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3847 struct bfd_link_info *info)
3848 {
3849 bfd *ibfd;
3850 asection *sec;
3851 struct ppc_elf_link_hash_table *htab;
3852
3853 if (info->relocatable || info->shared)
3854 return TRUE;
3855
3856 htab = ppc_elf_hash_table (info);
3857 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3858 {
3859 Elf_Internal_Sym *locsyms = NULL;
3860 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3861
3862 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3863 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3864 {
3865 Elf_Internal_Rela *relstart, *rel, *relend;
3866 int expecting_tls_get_addr;
3867
3868 /* Read the relocations. */
3869 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3870 info->keep_memory);
3871 if (relstart == NULL)
3872 return FALSE;
3873
3874 expecting_tls_get_addr = 0;
3875 relend = relstart + sec->reloc_count;
3876 for (rel = relstart; rel < relend; rel++)
3877 {
3878 enum elf_ppc_reloc_type r_type;
3879 unsigned long r_symndx;
3880 struct elf_link_hash_entry *h = NULL;
3881 char *tls_mask;
3882 char tls_set, tls_clear;
3883 bfd_boolean is_local;
3884
3885 r_symndx = ELF32_R_SYM (rel->r_info);
3886 if (r_symndx >= symtab_hdr->sh_info)
3887 {
3888 struct elf_link_hash_entry **sym_hashes;
3889
3890 sym_hashes = elf_sym_hashes (ibfd);
3891 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3892 while (h->root.type == bfd_link_hash_indirect
3893 || h->root.type == bfd_link_hash_warning)
3894 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3895 }
3896
3897 is_local = FALSE;
3898 if (h == NULL
3899 || !h->def_dynamic)
3900 is_local = TRUE;
3901
3902 r_type = ELF32_R_TYPE (rel->r_info);
3903 switch (r_type)
3904 {
3905 case R_PPC_GOT_TLSLD16:
3906 case R_PPC_GOT_TLSLD16_LO:
3907 case R_PPC_GOT_TLSLD16_HI:
3908 case R_PPC_GOT_TLSLD16_HA:
3909 /* These relocs should never be against a symbol
3910 defined in a shared lib. Leave them alone if
3911 that turns out to be the case. */
3912 expecting_tls_get_addr = 0;
3913 htab->tlsld_got.refcount -= 1;
3914 if (!is_local)
3915 continue;
3916
3917 /* LD -> LE */
3918 tls_set = 0;
3919 tls_clear = TLS_LD;
3920 expecting_tls_get_addr = 1;
3921 break;
3922
3923 case R_PPC_GOT_TLSGD16:
3924 case R_PPC_GOT_TLSGD16_LO:
3925 case R_PPC_GOT_TLSGD16_HI:
3926 case R_PPC_GOT_TLSGD16_HA:
3927 if (is_local)
3928 /* GD -> LE */
3929 tls_set = 0;
3930 else
3931 /* GD -> IE */
3932 tls_set = TLS_TLS | TLS_TPRELGD;
3933 tls_clear = TLS_GD;
3934 expecting_tls_get_addr = 1;
3935 break;
3936
3937 case R_PPC_GOT_TPREL16:
3938 case R_PPC_GOT_TPREL16_LO:
3939 case R_PPC_GOT_TPREL16_HI:
3940 case R_PPC_GOT_TPREL16_HA:
3941 expecting_tls_get_addr = 0;
3942 if (is_local)
3943 {
3944 /* IE -> LE */
3945 tls_set = 0;
3946 tls_clear = TLS_TPREL;
3947 break;
3948 }
3949 else
3950 continue;
3951
3952 case R_PPC_REL14:
3953 case R_PPC_REL14_BRTAKEN:
3954 case R_PPC_REL14_BRNTAKEN:
3955 case R_PPC_REL24:
3956 if (expecting_tls_get_addr
3957 && h != NULL
3958 && h == htab->tls_get_addr)
3959 {
3960 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3961 if (ent != NULL && ent->plt.refcount > 0)
3962 ent->plt.refcount -= 1;
3963 }
3964 expecting_tls_get_addr = 0;
3965 continue;
3966
3967 default:
3968 expecting_tls_get_addr = 0;
3969 continue;
3970 }
3971
3972 if (h != NULL)
3973 {
3974 if (tls_set == 0)
3975 {
3976 /* We managed to get rid of a got entry. */
3977 if (h->got.refcount > 0)
3978 h->got.refcount -= 1;
3979 }
3980 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3981 }
3982 else
3983 {
3984 Elf_Internal_Sym *sym;
3985 bfd_signed_vma *lgot_refs;
3986 char *lgot_masks;
3987
3988 if (locsyms == NULL)
3989 {
3990 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3991 if (locsyms == NULL)
3992 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3993 symtab_hdr->sh_info,
3994 0, NULL, NULL, NULL);
3995 if (locsyms == NULL)
3996 {
3997 if (elf_section_data (sec)->relocs != relstart)
3998 free (relstart);
3999 return FALSE;
4000 }
4001 }
4002 sym = locsyms + r_symndx;
4003 lgot_refs = elf_local_got_refcounts (ibfd);
4004 if (lgot_refs == NULL)
4005 abort ();
4006 if (tls_set == 0)
4007 {
4008 /* We managed to get rid of a got entry. */
4009 if (lgot_refs[r_symndx] > 0)
4010 lgot_refs[r_symndx] -= 1;
4011 }
4012 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4013 tls_mask = &lgot_masks[r_symndx];
4014 }
4015
4016 *tls_mask |= tls_set;
4017 *tls_mask &= ~tls_clear;
4018 }
4019
4020 if (elf_section_data (sec)->relocs != relstart)
4021 free (relstart);
4022 }
4023
4024 if (locsyms != NULL
4025 && (symtab_hdr->contents != (unsigned char *) locsyms))
4026 {
4027 if (!info->keep_memory)
4028 free (locsyms);
4029 else
4030 symtab_hdr->contents = (unsigned char *) locsyms;
4031 }
4032 }
4033 return TRUE;
4034 }
4035 \f
4036 /* Adjust a symbol defined by a dynamic object and referenced by a
4037 regular object. The current definition is in some section of the
4038 dynamic object, but we're not including those sections. We have to
4039 change the definition to something the rest of the link can
4040 understand. */
4041
4042 static bfd_boolean
4043 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4044 struct elf_link_hash_entry *h)
4045 {
4046 struct ppc_elf_link_hash_table *htab;
4047 asection *s;
4048 unsigned int power_of_two;
4049
4050 #ifdef DEBUG
4051 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4052 h->root.root.string);
4053 #endif
4054
4055 /* Make sure we know what is going on here. */
4056 htab = ppc_elf_hash_table (info);
4057 BFD_ASSERT (htab->elf.dynobj != NULL
4058 && (h->needs_plt
4059 || h->u.weakdef != NULL
4060 || (h->def_dynamic
4061 && h->ref_regular
4062 && !h->def_regular)));
4063
4064 /* Deal with function syms. */
4065 if (h->type == STT_FUNC
4066 || h->needs_plt)
4067 {
4068 /* Clear procedure linkage table information for any symbol that
4069 won't need a .plt entry. */
4070 struct plt_entry *ent;
4071 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4072 if (ent->plt.refcount > 0)
4073 break;
4074 if (ent == NULL
4075 || SYMBOL_CALLS_LOCAL (info, h)
4076 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4077 && h->root.type == bfd_link_hash_undefweak))
4078 {
4079 /* A PLT entry is not required/allowed when:
4080
4081 1. We are not using ld.so; because then the PLT entry
4082 can't be set up, so we can't use one. In this case,
4083 ppc_elf_adjust_dynamic_symbol won't even be called.
4084
4085 2. GC has rendered the entry unused.
4086
4087 3. We know for certain that a call to this symbol
4088 will go to this object, or will remain undefined. */
4089 h->plt.plist = NULL;
4090 h->needs_plt = 0;
4091 }
4092 return TRUE;
4093 }
4094 else
4095 h->plt.plist = NULL;
4096
4097 /* If this is a weak symbol, and there is a real definition, the
4098 processor independent code will have arranged for us to see the
4099 real definition first, and we can just use the same value. */
4100 if (h->u.weakdef != NULL)
4101 {
4102 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4103 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4104 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4105 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4106 if (ELIMINATE_COPY_RELOCS)
4107 h->non_got_ref = h->u.weakdef->non_got_ref;
4108 return TRUE;
4109 }
4110
4111 /* This is a reference to a symbol defined by a dynamic object which
4112 is not a function. */
4113
4114 /* If we are creating a shared library, we must presume that the
4115 only references to the symbol are via the global offset table.
4116 For such cases we need not do anything here; the relocations will
4117 be handled correctly by relocate_section. */
4118 if (info->shared)
4119 return TRUE;
4120
4121 /* If there are no references to this symbol that do not use the
4122 GOT, we don't need to generate a copy reloc. */
4123 if (!h->non_got_ref)
4124 return TRUE;
4125
4126 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4127 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4128 do this if there are any small data relocations. */
4129 if (ELIMINATE_COPY_RELOCS
4130 && !ppc_elf_hash_entry (h)->has_sda_refs)
4131 {
4132 struct ppc_elf_dyn_relocs *p;
4133 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4134 {
4135 s = p->sec->output_section;
4136 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4137 break;
4138 }
4139
4140 if (p == NULL)
4141 {
4142 h->non_got_ref = 0;
4143 return TRUE;
4144 }
4145 }
4146
4147 if (h->size == 0)
4148 {
4149 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4150 h->root.root.string);
4151 return TRUE;
4152 }
4153
4154 /* We must allocate the symbol in our .dynbss section, which will
4155 become part of the .bss section of the executable. There will be
4156 an entry for this symbol in the .dynsym section. The dynamic
4157 object will contain position independent code, so all references
4158 from the dynamic object to this symbol will go through the global
4159 offset table. The dynamic linker will use the .dynsym entry to
4160 determine the address it must put in the global offset table, so
4161 both the dynamic object and the regular object will refer to the
4162 same memory location for the variable.
4163
4164 Of course, if the symbol is referenced using SDAREL relocs, we
4165 must instead allocate it in .sbss. */
4166
4167 if (ppc_elf_hash_entry (h)->has_sda_refs)
4168 s = htab->dynsbss;
4169 else
4170 s = htab->dynbss;
4171 BFD_ASSERT (s != NULL);
4172
4173 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4174 copy the initial value out of the dynamic object and into the
4175 runtime process image. We need to remember the offset into the
4176 .rela.bss section we are going to use. */
4177 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4178 {
4179 asection *srel;
4180
4181 if (ppc_elf_hash_entry (h)->has_sda_refs)
4182 srel = htab->relsbss;
4183 else
4184 srel = htab->relbss;
4185 BFD_ASSERT (srel != NULL);
4186 srel->size += sizeof (Elf32_External_Rela);
4187 h->needs_copy = 1;
4188 }
4189
4190 /* We need to figure out the alignment required for this symbol. I
4191 have no idea how ELF linkers handle this. */
4192 power_of_two = bfd_log2 (h->size);
4193 if (power_of_two > 4)
4194 power_of_two = 4;
4195
4196 /* Apply the required alignment. */
4197 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4198 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4199 {
4200 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4201 return FALSE;
4202 }
4203
4204 /* Define the symbol as being at this point in the section. */
4205 h->root.u.def.section = s;
4206 h->root.u.def.value = s->size;
4207
4208 /* Increment the section size to make room for the symbol. */
4209 s->size += h->size;
4210
4211 return TRUE;
4212 }
4213 \f
4214 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4215 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4216 specifying the addend on the plt relocation. For -fpic code, the sym
4217 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4218 xxxxxxxx.got2.plt_pic32.<callee>. */
4219
4220 static bfd_boolean
4221 add_stub_sym (struct plt_entry *ent,
4222 struct elf_link_hash_entry *h,
4223 struct bfd_link_info *info)
4224 {
4225 struct elf_link_hash_entry *sh;
4226 size_t len1, len2, len3;
4227 char *name;
4228 const char *stub;
4229 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4230
4231 if (info->shared || info->pie)
4232 stub = ".plt_pic32.";
4233 else
4234 stub = ".plt_call32.";
4235
4236 len1 = strlen (h->root.root.string);
4237 len2 = strlen (stub);
4238 len3 = 0;
4239 if (ent->sec)
4240 len3 = strlen (ent->sec->name);
4241 name = bfd_malloc (len1 + len2 + len3 + 9);
4242 if (name == NULL)
4243 return FALSE;
4244 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4245 if (ent->sec)
4246 memcpy (name + 8, ent->sec->name, len3);
4247 memcpy (name + 8 + len3, stub, len2);
4248 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4249 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4250 if (sh == NULL)
4251 return FALSE;
4252 if (sh->root.type == bfd_link_hash_new)
4253 {
4254 sh->root.type = bfd_link_hash_defined;
4255 sh->root.u.def.section = htab->glink;
4256 sh->root.u.def.value = ent->glink_offset;
4257 sh->ref_regular = 1;
4258 sh->def_regular = 1;
4259 sh->ref_regular_nonweak = 1;
4260 sh->forced_local = 1;
4261 sh->non_elf = 0;
4262 }
4263 return TRUE;
4264 }
4265
4266 /* Allocate NEED contiguous space in .got, and return the offset.
4267 Handles allocation of the got header when crossing 32k. */
4268
4269 static bfd_vma
4270 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4271 {
4272 bfd_vma where;
4273 unsigned int max_before_header;
4274
4275 if (htab->plt_type == PLT_VXWORKS)
4276 {
4277 where = htab->got->size;
4278 htab->got->size += need;
4279 }
4280 else
4281 {
4282 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4283 if (need <= htab->got_gap)
4284 {
4285 where = max_before_header - htab->got_gap;
4286 htab->got_gap -= need;
4287 }
4288 else
4289 {
4290 if (htab->got->size + need > max_before_header
4291 && htab->got->size <= max_before_header)
4292 {
4293 htab->got_gap = max_before_header - htab->got->size;
4294 htab->got->size = max_before_header + htab->got_header_size;
4295 }
4296 where = htab->got->size;
4297 htab->got->size += need;
4298 }
4299 }
4300 return where;
4301 }
4302
4303 /* Allocate space in associated reloc sections for dynamic relocs. */
4304
4305 static bfd_boolean
4306 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4307 {
4308 struct bfd_link_info *info = inf;
4309 struct ppc_elf_link_hash_entry *eh;
4310 struct ppc_elf_link_hash_table *htab;
4311 struct ppc_elf_dyn_relocs *p;
4312
4313 if (h->root.type == bfd_link_hash_indirect)
4314 return TRUE;
4315
4316 if (h->root.type == bfd_link_hash_warning)
4317 /* When warning symbols are created, they **replace** the "real"
4318 entry in the hash table, thus we never get to see the real
4319 symbol in a hash traversal. So look at it now. */
4320 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4321
4322 htab = ppc_elf_hash_table (info);
4323 if (htab->elf.dynamic_sections_created)
4324 {
4325 struct plt_entry *ent;
4326 bfd_boolean doneone = FALSE;
4327 bfd_vma plt_offset = 0, glink_offset = 0;
4328
4329 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4330 if (ent->plt.refcount > 0)
4331 {
4332 /* Make sure this symbol is output as a dynamic symbol. */
4333 if (h->dynindx == -1
4334 && !h->forced_local)
4335 {
4336 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4337 return FALSE;
4338 }
4339
4340 if (info->shared
4341 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4342 {
4343 asection *s = htab->plt;
4344
4345 if (htab->plt_type == PLT_NEW)
4346 {
4347 if (!doneone)
4348 {
4349 plt_offset = s->size;
4350 s->size += 4;
4351 }
4352 ent->plt.offset = plt_offset;
4353
4354 s = htab->glink;
4355 if (!doneone || info->shared || info->pie)
4356 {
4357 glink_offset = s->size;
4358 s->size += GLINK_ENTRY_SIZE;
4359 }
4360 if (!doneone
4361 && !info->shared
4362 && !h->def_regular)
4363 {
4364 h->root.u.def.section = s;
4365 h->root.u.def.value = glink_offset;
4366 }
4367 ent->glink_offset = glink_offset;
4368
4369 if (htab->emit_stub_syms
4370 && !add_stub_sym (ent, h, info))
4371 return FALSE;
4372 }
4373 else
4374 {
4375 if (!doneone)
4376 {
4377 /* If this is the first .plt entry, make room
4378 for the special first entry. */
4379 if (s->size == 0)
4380 s->size += htab->plt_initial_entry_size;
4381
4382 /* The PowerPC PLT is actually composed of two
4383 parts, the first part is 2 words (for a load
4384 and a jump), and then there is a remaining
4385 word available at the end. */
4386 plt_offset = (htab->plt_initial_entry_size
4387 + (htab->plt_slot_size
4388 * ((s->size
4389 - htab->plt_initial_entry_size)
4390 / htab->plt_entry_size)));
4391
4392 /* If this symbol is not defined in a regular
4393 file, and we are not generating a shared
4394 library, then set the symbol to this location
4395 in the .plt. This is required to make
4396 function pointers compare as equal between
4397 the normal executable and the shared library. */
4398 if (! info->shared
4399 && !h->def_regular)
4400 {
4401 h->root.u.def.section = s;
4402 h->root.u.def.value = plt_offset;
4403 }
4404
4405 /* Make room for this entry. */
4406 s->size += htab->plt_entry_size;
4407 /* After the 8192nd entry, room for two entries
4408 is allocated. */
4409 if (htab->plt_type == PLT_OLD
4410 && (s->size - htab->plt_initial_entry_size)
4411 / htab->plt_entry_size
4412 > PLT_NUM_SINGLE_ENTRIES)
4413 s->size += htab->plt_entry_size;
4414 }
4415 ent->plt.offset = plt_offset;
4416 }
4417
4418 /* We also need to make an entry in the .rela.plt section. */
4419 if (!doneone)
4420 {
4421 htab->relplt->size += sizeof (Elf32_External_Rela);
4422
4423 if (htab->plt_type == PLT_VXWORKS)
4424 {
4425 /* Allocate space for the unloaded relocations. */
4426 if (!info->shared)
4427 {
4428 if (ent->plt.offset
4429 == (bfd_vma) htab->plt_initial_entry_size)
4430 {
4431 htab->srelplt2->size
4432 += sizeof (Elf32_External_Rela)
4433 * VXWORKS_PLTRESOLVE_RELOCS;
4434 }
4435
4436 htab->srelplt2->size
4437 += sizeof (Elf32_External_Rela)
4438 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4439 }
4440
4441 /* Every PLT entry has an associated GOT entry in
4442 .got.plt. */
4443 htab->sgotplt->size += 4;
4444 }
4445 doneone = TRUE;
4446 }
4447 }
4448 else
4449 ent->plt.offset = (bfd_vma) -1;
4450
4451 if (!doneone)
4452 {
4453 h->plt.plist = NULL;
4454 h->needs_plt = 0;
4455 }
4456 }
4457 }
4458 else
4459 {
4460 h->plt.plist = NULL;
4461 h->needs_plt = 0;
4462 }
4463
4464 eh = (struct ppc_elf_link_hash_entry *) h;
4465 if (eh->elf.got.refcount > 0)
4466 {
4467 /* Make sure this symbol is output as a dynamic symbol. */
4468 if (eh->elf.dynindx == -1
4469 && !eh->elf.forced_local)
4470 {
4471 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4472 return FALSE;
4473 }
4474
4475 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4476 && !eh->elf.def_dynamic)
4477 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4478 eh->elf.got.offset = (bfd_vma) -1;
4479 else
4480 {
4481 bfd_boolean dyn;
4482 unsigned int need = 0;
4483 if ((eh->tls_mask & TLS_TLS) != 0)
4484 {
4485 if ((eh->tls_mask & TLS_LD) != 0)
4486 need += 8;
4487 if ((eh->tls_mask & TLS_GD) != 0)
4488 need += 8;
4489 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4490 need += 4;
4491 if ((eh->tls_mask & TLS_DTPREL) != 0)
4492 need += 4;
4493 }
4494 else
4495 need += 4;
4496 eh->elf.got.offset = allocate_got (htab, need);
4497 dyn = htab->elf.dynamic_sections_created;
4498 if ((info->shared
4499 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4500 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4501 || eh->elf.root.type != bfd_link_hash_undefweak))
4502 {
4503 /* All the entries we allocated need relocs.
4504 Except LD only needs one. */
4505 if ((eh->tls_mask & TLS_LD) != 0)
4506 need -= 4;
4507 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4508 }
4509 }
4510 }
4511 else
4512 eh->elf.got.offset = (bfd_vma) -1;
4513
4514 if (eh->dyn_relocs == NULL)
4515 return TRUE;
4516
4517 /* In the shared -Bsymbolic case, discard space allocated for
4518 dynamic pc-relative relocs against symbols which turn out to be
4519 defined in regular objects. For the normal shared case, discard
4520 space for relocs that have become local due to symbol visibility
4521 changes. */
4522
4523 if (info->shared)
4524 {
4525 /* Relocs that use pc_count are those that appear on a call insn,
4526 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4527 generated via assembly. We want calls to protected symbols to
4528 resolve directly to the function rather than going via the plt.
4529 If people want function pointer comparisons to work as expected
4530 then they should avoid writing weird assembly. */
4531 if (SYMBOL_CALLS_LOCAL (info, h))
4532 {
4533 struct ppc_elf_dyn_relocs **pp;
4534
4535 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4536 {
4537 p->count -= p->pc_count;
4538 p->pc_count = 0;
4539 if (p->count == 0)
4540 *pp = p->next;
4541 else
4542 pp = &p->next;
4543 }
4544 }
4545
4546 /* Also discard relocs on undefined weak syms with non-default
4547 visibility. */
4548 if (eh->dyn_relocs != NULL
4549 && h->root.type == bfd_link_hash_undefweak)
4550 {
4551 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4552 eh->dyn_relocs = NULL;
4553
4554 /* Make sure undefined weak symbols are output as a dynamic
4555 symbol in PIEs. */
4556 else if (h->dynindx == -1
4557 && !h->forced_local)
4558 {
4559 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4560 return FALSE;
4561 }
4562 }
4563 }
4564 else if (ELIMINATE_COPY_RELOCS)
4565 {
4566 /* For the non-shared case, discard space for relocs against
4567 symbols which turn out to need copy relocs or are not
4568 dynamic. */
4569
4570 if (!h->non_got_ref
4571 && h->def_dynamic
4572 && !h->def_regular)
4573 {
4574 /* Make sure this symbol is output as a dynamic symbol.
4575 Undefined weak syms won't yet be marked as dynamic. */
4576 if (h->dynindx == -1
4577 && !h->forced_local)
4578 {
4579 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4580 return FALSE;
4581 }
4582
4583 /* If that succeeded, we know we'll be keeping all the
4584 relocs. */
4585 if (h->dynindx != -1)
4586 goto keep;
4587 }
4588
4589 eh->dyn_relocs = NULL;
4590
4591 keep: ;
4592 }
4593
4594 /* Finally, allocate space. */
4595 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4596 {
4597 asection *sreloc = elf_section_data (p->sec)->sreloc;
4598 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4599 }
4600
4601 return TRUE;
4602 }
4603
4604 /* Find any dynamic relocs that apply to read-only sections. */
4605
4606 static bfd_boolean
4607 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4608 {
4609 struct ppc_elf_dyn_relocs *p;
4610
4611 if (h->root.type == bfd_link_hash_indirect)
4612 return TRUE;
4613
4614 if (h->root.type == bfd_link_hash_warning)
4615 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4616
4617 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4618 {
4619 asection *s = p->sec->output_section;
4620
4621 if (s != NULL
4622 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4623 == (SEC_READONLY | SEC_ALLOC)))
4624 {
4625 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4626
4627 /* Not an error, just cut short the traversal. */
4628 return FALSE;
4629 }
4630 }
4631 return TRUE;
4632 }
4633
4634 /* Set the sizes of the dynamic sections. */
4635
4636 static bfd_boolean
4637 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4638 struct bfd_link_info *info)
4639 {
4640 struct ppc_elf_link_hash_table *htab;
4641 asection *s;
4642 bfd_boolean relocs;
4643 bfd *ibfd;
4644
4645 #ifdef DEBUG
4646 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4647 #endif
4648
4649 htab = ppc_elf_hash_table (info);
4650 BFD_ASSERT (htab->elf.dynobj != NULL);
4651
4652 if (elf_hash_table (info)->dynamic_sections_created)
4653 {
4654 /* Set the contents of the .interp section to the interpreter. */
4655 if (info->executable)
4656 {
4657 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4658 BFD_ASSERT (s != NULL);
4659 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4660 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4661 }
4662 }
4663
4664 if (htab->plt_type == PLT_OLD)
4665 htab->got_header_size = 16;
4666 else if (htab->plt_type == PLT_NEW)
4667 htab->got_header_size = 12;
4668
4669 /* Set up .got offsets for local syms, and space for local dynamic
4670 relocs. */
4671 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4672 {
4673 bfd_signed_vma *local_got;
4674 bfd_signed_vma *end_local_got;
4675 char *lgot_masks;
4676 bfd_size_type locsymcount;
4677 Elf_Internal_Shdr *symtab_hdr;
4678
4679 if (!is_ppc_elf_target (ibfd->xvec))
4680 continue;
4681
4682 for (s = ibfd->sections; s != NULL; s = s->next)
4683 {
4684 struct ppc_elf_dyn_relocs *p;
4685
4686 for (p = ((struct ppc_elf_dyn_relocs *)
4687 elf_section_data (s)->local_dynrel);
4688 p != NULL;
4689 p = p->next)
4690 {
4691 if (!bfd_is_abs_section (p->sec)
4692 && bfd_is_abs_section (p->sec->output_section))
4693 {
4694 /* Input section has been discarded, either because
4695 it is a copy of a linkonce section or due to
4696 linker script /DISCARD/, so we'll be discarding
4697 the relocs too. */
4698 }
4699 else if (p->count != 0)
4700 {
4701 elf_section_data (p->sec)->sreloc->size
4702 += p->count * sizeof (Elf32_External_Rela);
4703 if ((p->sec->output_section->flags
4704 & (SEC_READONLY | SEC_ALLOC))
4705 == (SEC_READONLY | SEC_ALLOC))
4706 info->flags |= DF_TEXTREL;
4707 }
4708 }
4709 }
4710
4711 local_got = elf_local_got_refcounts (ibfd);
4712 if (!local_got)
4713 continue;
4714
4715 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4716 locsymcount = symtab_hdr->sh_info;
4717 end_local_got = local_got + locsymcount;
4718 lgot_masks = (char *) end_local_got;
4719 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4720 if (*local_got > 0)
4721 {
4722 if (*lgot_masks == (TLS_TLS | TLS_LD))
4723 {
4724 /* If just an LD reloc, we'll just use
4725 htab->tlsld_got.offset. */
4726 htab->tlsld_got.refcount += 1;
4727 *local_got = (bfd_vma) -1;
4728 }
4729 else
4730 {
4731 unsigned int need = 0;
4732 if ((*lgot_masks & TLS_TLS) != 0)
4733 {
4734 if ((*lgot_masks & TLS_GD) != 0)
4735 need += 8;
4736 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4737 need += 4;
4738 if ((*lgot_masks & TLS_DTPREL) != 0)
4739 need += 4;
4740 }
4741 else
4742 need += 4;
4743 *local_got = allocate_got (htab, need);
4744 if (info->shared)
4745 htab->relgot->size += (need
4746 * (sizeof (Elf32_External_Rela) / 4));
4747 }
4748 }
4749 else
4750 *local_got = (bfd_vma) -1;
4751 }
4752
4753 if (htab->tlsld_got.refcount > 0)
4754 {
4755 htab->tlsld_got.offset = allocate_got (htab, 8);
4756 if (info->shared)
4757 htab->relgot->size += sizeof (Elf32_External_Rela);
4758 }
4759 else
4760 htab->tlsld_got.offset = (bfd_vma) -1;
4761
4762 /* Allocate space for global sym dynamic relocs. */
4763 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4764
4765 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4766 {
4767 unsigned int g_o_t = 32768;
4768
4769 /* If we haven't allocated the header, do so now. When we get here,
4770 for old plt/got the got size will be 0 to 32764 (not allocated),
4771 or 32780 to 65536 (header allocated). For new plt/got, the
4772 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4773 if (htab->got->size <= 32768)
4774 {
4775 g_o_t = htab->got->size;
4776 if (htab->plt_type == PLT_OLD)
4777 g_o_t += 4;
4778 htab->got->size += htab->got_header_size;
4779 }
4780
4781 htab->elf.hgot->root.u.def.value = g_o_t;
4782 }
4783
4784 if (htab->glink != NULL && htab->glink->size != 0)
4785 {
4786 htab->glink_pltresolve = htab->glink->size;
4787 /* Space for the branch table. */
4788 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4789 /* Pad out to align the start of PLTresolve. */
4790 htab->glink->size += -htab->glink->size & 15;
4791 htab->glink->size += GLINK_PLTRESOLVE;
4792
4793 if (htab->emit_stub_syms)
4794 {
4795 struct elf_link_hash_entry *sh;
4796 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4797 TRUE, FALSE, FALSE);
4798 if (sh == NULL)
4799 return FALSE;
4800 if (sh->root.type == bfd_link_hash_new)
4801 {
4802 sh->root.type = bfd_link_hash_defined;
4803 sh->root.u.def.section = htab->glink;
4804 sh->root.u.def.value = htab->glink_pltresolve;
4805 sh->ref_regular = 1;
4806 sh->def_regular = 1;
4807 sh->ref_regular_nonweak = 1;
4808 sh->forced_local = 1;
4809 sh->non_elf = 0;
4810 }
4811 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4812 TRUE, FALSE, FALSE);
4813 if (sh == NULL)
4814 return FALSE;
4815 if (sh->root.type == bfd_link_hash_new)
4816 {
4817 sh->root.type = bfd_link_hash_defined;
4818 sh->root.u.def.section = htab->glink;
4819 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4820 sh->ref_regular = 1;
4821 sh->def_regular = 1;
4822 sh->ref_regular_nonweak = 1;
4823 sh->forced_local = 1;
4824 sh->non_elf = 0;
4825 }
4826 }
4827 }
4828
4829 /* We've now determined the sizes of the various dynamic sections.
4830 Allocate memory for them. */
4831 relocs = FALSE;
4832 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4833 {
4834 bfd_boolean strip_section = TRUE;
4835
4836 if ((s->flags & SEC_LINKER_CREATED) == 0)
4837 continue;
4838
4839 if (s == htab->plt
4840 || s == htab->glink
4841 || s == htab->got
4842 || s == htab->sgotplt
4843 || s == htab->sbss
4844 || s == htab->dynbss
4845 || s == htab->dynsbss)
4846 {
4847 /* We'd like to strip these sections if they aren't needed, but if
4848 we've exported dynamic symbols from them we must leave them.
4849 It's too late to tell BFD to get rid of the symbols. */
4850 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4851 strip_section = FALSE;
4852 /* Strip this section if we don't need it; see the
4853 comment below. */
4854 }
4855 else if (s == htab->sdata[0].section
4856 || s == htab->sdata[1].section)
4857 {
4858 /* Strip these too. */
4859 }
4860 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4861 {
4862 if (s->size != 0)
4863 {
4864 /* Remember whether there are any relocation sections. */
4865 relocs = TRUE;
4866
4867 /* We use the reloc_count field as a counter if we need
4868 to copy relocs into the output file. */
4869 s->reloc_count = 0;
4870 }
4871 }
4872 else
4873 {
4874 /* It's not one of our sections, so don't allocate space. */
4875 continue;
4876 }
4877
4878 if (s->size == 0 && strip_section)
4879 {
4880 /* If we don't need this section, strip it from the
4881 output file. This is mostly to handle .rela.bss and
4882 .rela.plt. We must create both sections in
4883 create_dynamic_sections, because they must be created
4884 before the linker maps input sections to output
4885 sections. The linker does that before
4886 adjust_dynamic_symbol is called, and it is that
4887 function which decides whether anything needs to go
4888 into these sections. */
4889 s->flags |= SEC_EXCLUDE;
4890 continue;
4891 }
4892
4893 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4894 continue;
4895
4896 /* Allocate memory for the section contents. */
4897 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4898 if (s->contents == NULL)
4899 return FALSE;
4900 }
4901
4902 if (htab->elf.dynamic_sections_created)
4903 {
4904 /* Add some entries to the .dynamic section. We fill in the
4905 values later, in ppc_elf_finish_dynamic_sections, but we
4906 must add the entries now so that we get the correct size for
4907 the .dynamic section. The DT_DEBUG entry is filled in by the
4908 dynamic linker and used by the debugger. */
4909 #define add_dynamic_entry(TAG, VAL) \
4910 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4911
4912 if (info->executable)
4913 {
4914 if (!add_dynamic_entry (DT_DEBUG, 0))
4915 return FALSE;
4916 }
4917
4918 if (htab->plt != NULL && htab->plt->size != 0)
4919 {
4920 if (!add_dynamic_entry (DT_PLTGOT, 0)
4921 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4922 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4923 || !add_dynamic_entry (DT_JMPREL, 0))
4924 return FALSE;
4925 }
4926
4927 if (htab->glink != NULL && htab->glink->size != 0)
4928 {
4929 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4930 return FALSE;
4931 }
4932
4933 if (relocs)
4934 {
4935 if (!add_dynamic_entry (DT_RELA, 0)
4936 || !add_dynamic_entry (DT_RELASZ, 0)
4937 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4938 return FALSE;
4939 }
4940
4941 /* If any dynamic relocs apply to a read-only section, then we
4942 need a DT_TEXTREL entry. */
4943 if ((info->flags & DF_TEXTREL) == 0)
4944 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4945 info);
4946
4947 if ((info->flags & DF_TEXTREL) != 0)
4948 {
4949 if (!add_dynamic_entry (DT_TEXTREL, 0))
4950 return FALSE;
4951 }
4952 }
4953 #undef add_dynamic_entry
4954
4955 return TRUE;
4956 }
4957 \f
4958 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4959
4960 static const int shared_stub_entry[] =
4961 {
4962 0x7c0802a6, /* mflr 0 */
4963 0x429f0005, /* bcl 20, 31, .Lxxx */
4964 0x7d6802a6, /* mflr 11 */
4965 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4966 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4967 0x7c0803a6, /* mtlr 0 */
4968 0x7d6903a6, /* mtctr 11 */
4969 0x4e800420, /* bctr */
4970 };
4971
4972 static const int stub_entry[] =
4973 {
4974 0x3d600000, /* lis 11,xxx@ha */
4975 0x396b0000, /* addi 11,11,xxx@l */
4976 0x7d6903a6, /* mtctr 11 */
4977 0x4e800420, /* bctr */
4978 };
4979
4980 static bfd_boolean
4981 ppc_elf_relax_section (bfd *abfd,
4982 asection *isec,
4983 struct bfd_link_info *link_info,
4984 bfd_boolean *again)
4985 {
4986 struct one_fixup
4987 {
4988 struct one_fixup *next;
4989 asection *tsec;
4990 bfd_vma toff;
4991 bfd_vma trampoff;
4992 };
4993
4994 Elf_Internal_Shdr *symtab_hdr;
4995 bfd_byte *contents = NULL;
4996 Elf_Internal_Sym *isymbuf = NULL;
4997 Elf_Internal_Rela *internal_relocs = NULL;
4998 Elf_Internal_Rela *irel, *irelend;
4999 struct one_fixup *fixups = NULL;
5000 bfd_boolean changed;
5001 struct ppc_elf_link_hash_table *htab;
5002 bfd_size_type trampoff;
5003 asection *got2;
5004
5005 *again = FALSE;
5006
5007 /* Nothing to do if there are no relocations, and no need to do
5008 anything with non-alloc sections. */
5009 if ((isec->flags & SEC_ALLOC) == 0
5010 || (isec->flags & SEC_RELOC) == 0
5011 || isec->reloc_count == 0)
5012 return TRUE;
5013
5014 trampoff = (isec->size + 3) & (bfd_vma) -4;
5015 /* Space for a branch around any trampolines. */
5016 trampoff += 4;
5017
5018 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5019
5020 /* Get a copy of the native relocations. */
5021 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5022 link_info->keep_memory);
5023 if (internal_relocs == NULL)
5024 goto error_return;
5025
5026 htab = ppc_elf_hash_table (link_info);
5027 got2 = bfd_get_section_by_name (abfd, ".got2");
5028
5029 irelend = internal_relocs + isec->reloc_count;
5030 for (irel = internal_relocs; irel < irelend; irel++)
5031 {
5032 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5033 bfd_vma symaddr, reladdr, toff, roff;
5034 asection *tsec;
5035 struct one_fixup *f;
5036 size_t insn_offset = 0;
5037 bfd_vma max_branch_offset, val;
5038 bfd_byte *hit_addr;
5039 unsigned long t0;
5040 unsigned char sym_type;
5041
5042 switch (r_type)
5043 {
5044 case R_PPC_REL24:
5045 case R_PPC_LOCAL24PC:
5046 case R_PPC_PLTREL24:
5047 max_branch_offset = 1 << 25;
5048 break;
5049
5050 case R_PPC_REL14:
5051 case R_PPC_REL14_BRTAKEN:
5052 case R_PPC_REL14_BRNTAKEN:
5053 max_branch_offset = 1 << 15;
5054 break;
5055
5056 default:
5057 continue;
5058 }
5059
5060 /* Get the value of the symbol referred to by the reloc. */
5061 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5062 {
5063 /* A local symbol. */
5064 Elf_Internal_Sym *isym;
5065
5066 /* Read this BFD's local symbols. */
5067 if (isymbuf == NULL)
5068 {
5069 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5070 if (isymbuf == NULL)
5071 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5072 symtab_hdr->sh_info, 0,
5073 NULL, NULL, NULL);
5074 if (isymbuf == 0)
5075 goto error_return;
5076 }
5077 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5078 if (isym->st_shndx == SHN_UNDEF)
5079 continue; /* We can't do anything with undefined symbols. */
5080 else if (isym->st_shndx == SHN_ABS)
5081 tsec = bfd_abs_section_ptr;
5082 else if (isym->st_shndx == SHN_COMMON)
5083 tsec = bfd_com_section_ptr;
5084 else
5085 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5086
5087 toff = isym->st_value;
5088 sym_type = ELF_ST_TYPE (isym->st_info);
5089 }
5090 else
5091 {
5092 /* Global symbol handling. */
5093 unsigned long indx;
5094 struct elf_link_hash_entry *h;
5095
5096 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5097 h = elf_sym_hashes (abfd)[indx];
5098
5099 while (h->root.type == bfd_link_hash_indirect
5100 || h->root.type == bfd_link_hash_warning)
5101 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5102
5103 tsec = NULL;
5104 toff = 0;
5105 if (r_type == R_PPC_PLTREL24
5106 && htab->plt != NULL)
5107 {
5108 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5109
5110 if (ent != NULL)
5111 {
5112 if (htab->plt_type == PLT_NEW)
5113 {
5114 tsec = htab->glink;
5115 toff = ent->glink_offset;
5116 }
5117 else
5118 {
5119 tsec = htab->plt;
5120 toff = ent->plt.offset;
5121 }
5122 }
5123 }
5124 if (tsec != NULL)
5125 ;
5126 else if (h->root.type == bfd_link_hash_defined
5127 || h->root.type == bfd_link_hash_defweak)
5128 {
5129 tsec = h->root.u.def.section;
5130 toff = h->root.u.def.value;
5131 }
5132 else
5133 continue;
5134
5135 sym_type = h->type;
5136 }
5137
5138 /* If the branch and target are in the same section, you have
5139 no hope of adding stubs. We'll error out later should the
5140 branch overflow. */
5141 if (tsec == isec)
5142 continue;
5143
5144 /* There probably isn't any reason to handle symbols in
5145 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5146 attribute for a code section, and we are only looking at
5147 branches. However, implement it correctly here as a
5148 reference for other target relax_section functions. */
5149 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5150 {
5151 /* At this stage in linking, no SEC_MERGE symbol has been
5152 adjusted, so all references to such symbols need to be
5153 passed through _bfd_merged_section_offset. (Later, in
5154 relocate_section, all SEC_MERGE symbols *except* for
5155 section symbols have been adjusted.)
5156
5157 gas may reduce relocations against symbols in SEC_MERGE
5158 sections to a relocation against the section symbol when
5159 the original addend was zero. When the reloc is against
5160 a section symbol we should include the addend in the
5161 offset passed to _bfd_merged_section_offset, since the
5162 location of interest is the original symbol. On the
5163 other hand, an access to "sym+addend" where "sym" is not
5164 a section symbol should not include the addend; Such an
5165 access is presumed to be an offset from "sym"; The
5166 location of interest is just "sym". */
5167 if (sym_type == STT_SECTION)
5168 toff += irel->r_addend;
5169
5170 toff = _bfd_merged_section_offset (abfd, &tsec,
5171 elf_section_data (tsec)->sec_info,
5172 toff);
5173
5174 if (sym_type != STT_SECTION)
5175 toff += irel->r_addend;
5176 }
5177 /* PLTREL24 addends are special. */
5178 else if (r_type != R_PPC_PLTREL24)
5179 toff += irel->r_addend;
5180
5181 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5182
5183 roff = irel->r_offset;
5184 reladdr = isec->output_section->vma + isec->output_offset + roff;
5185
5186 /* If the branch is in range, no need to do anything. */
5187 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5188 continue;
5189
5190 /* Look for an existing fixup to this address. */
5191 for (f = fixups; f ; f = f->next)
5192 if (f->tsec == tsec && f->toff == toff)
5193 break;
5194
5195 if (f == NULL)
5196 {
5197 size_t size;
5198 unsigned long stub_rtype;
5199
5200 val = trampoff - roff;
5201 if (val >= max_branch_offset)
5202 /* Oh dear, we can't reach a trampoline. Don't try to add
5203 one. We'll report an error later. */
5204 continue;
5205
5206 if (link_info->shared)
5207 {
5208 size = 4 * ARRAY_SIZE (shared_stub_entry);
5209 insn_offset = 12;
5210 stub_rtype = R_PPC_RELAX32PC;
5211 }
5212 else
5213 {
5214 size = 4 * ARRAY_SIZE (stub_entry);
5215 insn_offset = 0;
5216 stub_rtype = R_PPC_RELAX32;
5217 }
5218
5219 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5220 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5221 abort ();
5222 if (tsec == htab->plt
5223 || tsec == htab->glink)
5224 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5225
5226 /* Hijack the old relocation. Since we need two
5227 relocations for this use a "composite" reloc. */
5228 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5229 stub_rtype);
5230 irel->r_offset = trampoff + insn_offset;
5231
5232 /* Record the fixup so we don't do it again this section. */
5233 f = bfd_malloc (sizeof (*f));
5234 f->next = fixups;
5235 f->tsec = tsec;
5236 f->toff = toff;
5237 f->trampoff = trampoff;
5238 fixups = f;
5239
5240 trampoff += size;
5241 }
5242 else
5243 {
5244 val = f->trampoff - roff;
5245 if (val >= max_branch_offset)
5246 continue;
5247
5248 /* Nop out the reloc, since we're finalizing things here. */
5249 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5250 }
5251
5252 /* Get the section contents. */
5253 if (contents == NULL)
5254 {
5255 /* Get cached copy if it exists. */
5256 if (elf_section_data (isec)->this_hdr.contents != NULL)
5257 contents = elf_section_data (isec)->this_hdr.contents;
5258 else
5259 {
5260 /* Go get them off disk. */
5261 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5262 goto error_return;
5263 }
5264 }
5265
5266 /* Fix up the existing branch to hit the trampoline. */
5267 hit_addr = contents + roff;
5268 switch (r_type)
5269 {
5270 case R_PPC_REL24:
5271 case R_PPC_LOCAL24PC:
5272 case R_PPC_PLTREL24:
5273 t0 = bfd_get_32 (abfd, hit_addr);
5274 t0 &= ~0x3fffffc;
5275 t0 |= val & 0x3fffffc;
5276 bfd_put_32 (abfd, t0, hit_addr);
5277 break;
5278
5279 case R_PPC_REL14:
5280 case R_PPC_REL14_BRTAKEN:
5281 case R_PPC_REL14_BRNTAKEN:
5282 t0 = bfd_get_32 (abfd, hit_addr);
5283 t0 &= ~0xfffc;
5284 t0 |= val & 0xfffc;
5285 bfd_put_32 (abfd, t0, hit_addr);
5286 break;
5287 }
5288 }
5289
5290 /* Write out the trampolines. */
5291 changed = fixups != NULL;
5292 if (fixups != NULL)
5293 {
5294 const int *stub;
5295 bfd_byte *dest;
5296 bfd_vma val;
5297 int i, size;
5298
5299 do
5300 {
5301 struct one_fixup *f = fixups;
5302 fixups = fixups->next;
5303 free (f);
5304 }
5305 while (fixups);
5306
5307 contents = bfd_realloc (contents, trampoff);
5308 if (contents == NULL)
5309 goto error_return;
5310
5311 isec->size = (isec->size + 3) & (bfd_vma) -4;
5312 /* Branch around the trampolines. */
5313 val = trampoff - isec->size + 0x48000000;
5314 dest = contents + isec->size;
5315 isec->size = trampoff;
5316 bfd_put_32 (abfd, val, dest);
5317 dest += 4;
5318
5319 if (link_info->shared)
5320 {
5321 stub = shared_stub_entry;
5322 size = ARRAY_SIZE (shared_stub_entry);
5323 }
5324 else
5325 {
5326 stub = stub_entry;
5327 size = ARRAY_SIZE (stub_entry);
5328 }
5329
5330 i = 0;
5331 while (dest < contents + trampoff)
5332 {
5333 bfd_put_32 (abfd, stub[i], dest);
5334 i++;
5335 if (i == size)
5336 i = 0;
5337 dest += 4;
5338 }
5339 BFD_ASSERT (i == 0);
5340 }
5341
5342 if (isymbuf != NULL
5343 && symtab_hdr->contents != (unsigned char *) isymbuf)
5344 {
5345 if (! link_info->keep_memory)
5346 free (isymbuf);
5347 else
5348 {
5349 /* Cache the symbols for elf_link_input_bfd. */
5350 symtab_hdr->contents = (unsigned char *) isymbuf;
5351 }
5352 }
5353
5354 if (contents != NULL
5355 && elf_section_data (isec)->this_hdr.contents != contents)
5356 {
5357 if (!changed && !link_info->keep_memory)
5358 free (contents);
5359 else
5360 {
5361 /* Cache the section contents for elf_link_input_bfd. */
5362 elf_section_data (isec)->this_hdr.contents = contents;
5363 }
5364 }
5365
5366 if (elf_section_data (isec)->relocs != internal_relocs)
5367 {
5368 if (!changed)
5369 free (internal_relocs);
5370 else
5371 elf_section_data (isec)->relocs = internal_relocs;
5372 }
5373
5374 *again = changed;
5375 return TRUE;
5376
5377 error_return:
5378 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5379 free (isymbuf);
5380 if (contents != NULL
5381 && elf_section_data (isec)->this_hdr.contents != contents)
5382 free (contents);
5383 if (internal_relocs != NULL
5384 && elf_section_data (isec)->relocs != internal_relocs)
5385 free (internal_relocs);
5386 return FALSE;
5387 }
5388 \f
5389 /* What to do when ld finds relocations against symbols defined in
5390 discarded sections. */
5391
5392 static unsigned int
5393 ppc_elf_action_discarded (asection *sec)
5394 {
5395 if (strcmp (".fixup", sec->name) == 0)
5396 return 0;
5397
5398 if (strcmp (".got2", sec->name) == 0)
5399 return 0;
5400
5401 return _bfd_elf_default_action_discarded (sec);
5402 }
5403 \f
5404 /* Fill in the address for a pointer generated in a linker section. */
5405
5406 static bfd_vma
5407 elf_finish_pointer_linker_section (bfd *input_bfd,
5408 elf_linker_section_t *lsect,
5409 struct elf_link_hash_entry *h,
5410 bfd_vma relocation,
5411 const Elf_Internal_Rela *rel)
5412 {
5413 elf_linker_section_pointers_t *linker_section_ptr;
5414
5415 BFD_ASSERT (lsect != NULL);
5416
5417 if (h != NULL)
5418 {
5419 /* Handle global symbol. */
5420 struct ppc_elf_link_hash_entry *eh;
5421
5422 eh = (struct ppc_elf_link_hash_entry *) h;
5423 BFD_ASSERT (eh->elf.def_regular);
5424 linker_section_ptr = eh->linker_section_pointer;
5425 }
5426 else
5427 {
5428 /* Handle local symbol. */
5429 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5430
5431 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5432 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5433 }
5434
5435 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5436 rel->r_addend,
5437 lsect);
5438 BFD_ASSERT (linker_section_ptr != NULL);
5439
5440 /* Offset will always be a multiple of four, so use the bottom bit
5441 as a "written" flag. */
5442 if ((linker_section_ptr->offset & 1) == 0)
5443 {
5444 bfd_put_32 (lsect->section->owner,
5445 relocation + linker_section_ptr->addend,
5446 lsect->section->contents + linker_section_ptr->offset);
5447 linker_section_ptr->offset += 1;
5448 }
5449
5450 relocation = (lsect->section->output_offset
5451 + linker_section_ptr->offset - 1
5452 - 0x8000);
5453
5454 #ifdef DEBUG
5455 fprintf (stderr,
5456 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5457 lsect->name, (long) relocation, (long) relocation);
5458 #endif
5459
5460 /* Subtract out the addend, because it will get added back in by the normal
5461 processing. */
5462 return relocation - linker_section_ptr->addend;
5463 }
5464
5465 /* The RELOCATE_SECTION function is called by the ELF backend linker
5466 to handle the relocations for a section.
5467
5468 The relocs are always passed as Rela structures; if the section
5469 actually uses Rel structures, the r_addend field will always be
5470 zero.
5471
5472 This function is responsible for adjust the section contents as
5473 necessary, and (if using Rela relocs and generating a
5474 relocatable output file) adjusting the reloc addend as
5475 necessary.
5476
5477 This function does not have to worry about setting the reloc
5478 address or the reloc symbol index.
5479
5480 LOCAL_SYMS is a pointer to the swapped in local symbols.
5481
5482 LOCAL_SECTIONS is an array giving the section in the input file
5483 corresponding to the st_shndx field of each local symbol.
5484
5485 The global hash table entry for the global symbols can be found
5486 via elf_sym_hashes (input_bfd).
5487
5488 When generating relocatable output, this function must handle
5489 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5490 going to be the section symbol corresponding to the output
5491 section, which means that the addend must be adjusted
5492 accordingly. */
5493
5494 static bfd_boolean
5495 ppc_elf_relocate_section (bfd *output_bfd,
5496 struct bfd_link_info *info,
5497 bfd *input_bfd,
5498 asection *input_section,
5499 bfd_byte *contents,
5500 Elf_Internal_Rela *relocs,
5501 Elf_Internal_Sym *local_syms,
5502 asection **local_sections)
5503 {
5504 Elf_Internal_Shdr *symtab_hdr;
5505 struct elf_link_hash_entry **sym_hashes;
5506 struct ppc_elf_link_hash_table *htab;
5507 Elf_Internal_Rela *rel;
5508 Elf_Internal_Rela *relend;
5509 Elf_Internal_Rela outrel;
5510 bfd_byte *loc;
5511 asection *got2, *sreloc = NULL;
5512 bfd_vma *local_got_offsets;
5513 bfd_boolean ret = TRUE;
5514
5515 #ifdef DEBUG
5516 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5517 "%ld relocations%s",
5518 input_bfd, input_section,
5519 (long) input_section->reloc_count,
5520 (info->relocatable) ? " (relocatable)" : "");
5521 #endif
5522
5523 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5524
5525 if (info->relocatable)
5526 {
5527 if (got2 == NULL)
5528 return TRUE;
5529
5530 rel = relocs;
5531 relend = relocs + input_section->reloc_count;
5532 for (; rel < relend; rel++)
5533 {
5534 enum elf_ppc_reloc_type r_type;
5535
5536 r_type = ELF32_R_TYPE (rel->r_info);
5537 if (r_type == R_PPC_PLTREL24
5538 && rel->r_addend >= 32768)
5539 {
5540 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5541 addend specifies the GOT pointer offset within .got2. */
5542 rel->r_addend += got2->output_offset;
5543 }
5544 }
5545 return TRUE;
5546 }
5547
5548 /* Initialize howto table if not already done. */
5549 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5550 ppc_elf_howto_init ();
5551
5552 htab = ppc_elf_hash_table (info);
5553 local_got_offsets = elf_local_got_offsets (input_bfd);
5554 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5555 sym_hashes = elf_sym_hashes (input_bfd);
5556 rel = relocs;
5557 relend = relocs + input_section->reloc_count;
5558 for (; rel < relend; rel++)
5559 {
5560 enum elf_ppc_reloc_type r_type;
5561 bfd_vma addend;
5562 bfd_reloc_status_type r;
5563 Elf_Internal_Sym *sym;
5564 asection *sec;
5565 struct elf_link_hash_entry *h;
5566 const char *sym_name;
5567 reloc_howto_type *howto;
5568 unsigned long r_symndx;
5569 bfd_vma relocation;
5570 bfd_vma branch_bit, insn, from;
5571 bfd_boolean unresolved_reloc;
5572 bfd_boolean warned;
5573 unsigned int tls_type, tls_mask, tls_gd;
5574
5575 r_type = ELF32_R_TYPE (rel->r_info);
5576 sym = NULL;
5577 sec = NULL;
5578 h = NULL;
5579 unresolved_reloc = FALSE;
5580 warned = FALSE;
5581 r_symndx = ELF32_R_SYM (rel->r_info);
5582
5583 if (r_symndx < symtab_hdr->sh_info)
5584 {
5585 sym = local_syms + r_symndx;
5586 sec = local_sections[r_symndx];
5587 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5588
5589 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5590 }
5591 else
5592 {
5593 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5594 r_symndx, symtab_hdr, sym_hashes,
5595 h, sec, relocation,
5596 unresolved_reloc, warned);
5597
5598 sym_name = h->root.root.string;
5599 }
5600
5601 /* TLS optimizations. Replace instruction sequences and relocs
5602 based on information we collected in tls_optimize. We edit
5603 RELOCS so that --emit-relocs will output something sensible
5604 for the final instruction stream. */
5605 tls_mask = 0;
5606 tls_gd = 0;
5607 if (IS_PPC_TLS_RELOC (r_type))
5608 {
5609 if (h != NULL)
5610 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5611 else if (local_got_offsets != NULL)
5612 {
5613 char *lgot_masks;
5614 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5615 tls_mask = lgot_masks[r_symndx];
5616 }
5617 }
5618
5619 /* Ensure reloc mapping code below stays sane. */
5620 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5621 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5622 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5623 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5624 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5625 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5626 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5627 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5628 abort ();
5629 switch (r_type)
5630 {
5631 default:
5632 break;
5633
5634 case R_PPC_GOT_TPREL16:
5635 case R_PPC_GOT_TPREL16_LO:
5636 if (tls_mask != 0
5637 && (tls_mask & TLS_TPREL) == 0)
5638 {
5639 bfd_vma insn;
5640 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5641 insn &= 31 << 21;
5642 insn |= 0x3c020000; /* addis 0,2,0 */
5643 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5644 r_type = R_PPC_TPREL16_HA;
5645 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5646 }
5647 break;
5648
5649 case R_PPC_TLS:
5650 if (tls_mask != 0
5651 && (tls_mask & TLS_TPREL) == 0)
5652 {
5653 bfd_vma insn, rtra;
5654 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5655 if ((insn & ((31 << 26) | (31 << 11)))
5656 == ((31 << 26) | (2 << 11)))
5657 rtra = insn & ((1 << 26) - (1 << 16));
5658 else if ((insn & ((31 << 26) | (31 << 16)))
5659 == ((31 << 26) | (2 << 16)))
5660 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5661 else
5662 abort ();
5663 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5664 /* add -> addi. */
5665 insn = 14 << 26;
5666 else if ((insn & (31 << 1)) == 23 << 1
5667 && ((insn & (31 << 6)) < 14 << 6
5668 || ((insn & (31 << 6)) >= 16 << 6
5669 && (insn & (31 << 6)) < 24 << 6)))
5670 /* load and store indexed -> dform. */
5671 insn = (32 | ((insn >> 6) & 31)) << 26;
5672 else if ((insn & (31 << 1)) == 21 << 1
5673 && (insn & (0x1a << 6)) == 0)
5674 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5675 insn = (((58 | ((insn >> 6) & 4)) << 26)
5676 | ((insn >> 6) & 1));
5677 else if ((insn & (31 << 1)) == 21 << 1
5678 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5679 /* lwax -> lwa. */
5680 insn = (58 << 26) | 2;
5681 else
5682 abort ();
5683 insn |= rtra;
5684 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5685 r_type = R_PPC_TPREL16_LO;
5686 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5687 /* Was PPC_TLS which sits on insn boundary, now
5688 PPC_TPREL16_LO which is at insn+2. */
5689 rel->r_offset += 2;
5690 }
5691 break;
5692
5693 case R_PPC_GOT_TLSGD16_HI:
5694 case R_PPC_GOT_TLSGD16_HA:
5695 tls_gd = TLS_TPRELGD;
5696 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5697 goto tls_gdld_hi;
5698 break;
5699
5700 case R_PPC_GOT_TLSLD16_HI:
5701 case R_PPC_GOT_TLSLD16_HA:
5702 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5703 {
5704 tls_gdld_hi:
5705 if ((tls_mask & tls_gd) != 0)
5706 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5707 + R_PPC_GOT_TPREL16);
5708 else
5709 {
5710 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5711 rel->r_offset -= 2;
5712 r_type = R_PPC_NONE;
5713 }
5714 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5715 }
5716 break;
5717
5718 case R_PPC_GOT_TLSGD16:
5719 case R_PPC_GOT_TLSGD16_LO:
5720 tls_gd = TLS_TPRELGD;
5721 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5722 goto tls_get_addr_check;
5723 break;
5724
5725 case R_PPC_GOT_TLSLD16:
5726 case R_PPC_GOT_TLSLD16_LO:
5727 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5728 {
5729 tls_get_addr_check:
5730 if (rel + 1 < relend)
5731 {
5732 enum elf_ppc_reloc_type r_type2;
5733 unsigned long r_symndx2;
5734 struct elf_link_hash_entry *h2;
5735 bfd_vma insn1, insn2;
5736 bfd_vma offset;
5737
5738 /* The next instruction should be a call to
5739 __tls_get_addr. Peek at the reloc to be sure. */
5740 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5741 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5742 if (r_symndx2 < symtab_hdr->sh_info
5743 || (r_type2 != R_PPC_REL14
5744 && r_type2 != R_PPC_REL14_BRTAKEN
5745 && r_type2 != R_PPC_REL14_BRNTAKEN
5746 && r_type2 != R_PPC_REL24
5747 && r_type2 != R_PPC_PLTREL24))
5748 break;
5749
5750 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5751 while (h2->root.type == bfd_link_hash_indirect
5752 || h2->root.type == bfd_link_hash_warning)
5753 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5754 if (h2 == NULL || h2 != htab->tls_get_addr)
5755 break;
5756
5757 /* OK, it checks out. Replace the call. */
5758 offset = rel[1].r_offset;
5759 insn1 = bfd_get_32 (output_bfd,
5760 contents + rel->r_offset - 2);
5761 if ((tls_mask & tls_gd) != 0)
5762 {
5763 /* IE */
5764 insn1 &= (1 << 26) - 1;
5765 insn1 |= 32 << 26; /* lwz */
5766 insn2 = 0x7c631214; /* add 3,3,2 */
5767 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5768 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5769 + R_PPC_GOT_TPREL16);
5770 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5771 }
5772 else
5773 {
5774 /* LE */
5775 insn1 = 0x3c620000; /* addis 3,2,0 */
5776 insn2 = 0x38630000; /* addi 3,3,0 */
5777 if (tls_gd == 0)
5778 {
5779 /* Was an LD reloc. */
5780 r_symndx = 0;
5781 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5782 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5783 }
5784 r_type = R_PPC_TPREL16_HA;
5785 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5786 rel[1].r_info = ELF32_R_INFO (r_symndx,
5787 R_PPC_TPREL16_LO);
5788 rel[1].r_offset += 2;
5789 }
5790 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5791 bfd_put_32 (output_bfd, insn2, contents + offset);
5792 if (tls_gd == 0)
5793 {
5794 /* We changed the symbol on an LD reloc. Start over
5795 in order to get h, sym, sec etc. right. */
5796 rel--;
5797 continue;
5798 }
5799 }
5800 }
5801 break;
5802 }
5803
5804 /* Handle other relocations that tweak non-addend part of insn. */
5805 branch_bit = 0;
5806 switch (r_type)
5807 {
5808 default:
5809 break;
5810
5811 /* Branch taken prediction relocations. */
5812 case R_PPC_ADDR14_BRTAKEN:
5813 case R_PPC_REL14_BRTAKEN:
5814 branch_bit = BRANCH_PREDICT_BIT;
5815 /* Fall thru */
5816
5817 /* Branch not taken prediction relocations. */
5818 case R_PPC_ADDR14_BRNTAKEN:
5819 case R_PPC_REL14_BRNTAKEN:
5820 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5821 insn &= ~BRANCH_PREDICT_BIT;
5822 insn |= branch_bit;
5823
5824 from = (rel->r_offset
5825 + input_section->output_offset
5826 + input_section->output_section->vma);
5827
5828 /* Invert 'y' bit if not the default. */
5829 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5830 insn ^= BRANCH_PREDICT_BIT;
5831
5832 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5833 break;
5834 }
5835
5836 addend = rel->r_addend;
5837 tls_type = 0;
5838 howto = NULL;
5839 if (r_type < R_PPC_max)
5840 howto = ppc_elf_howto_table[r_type];
5841 switch (r_type)
5842 {
5843 default:
5844 (*_bfd_error_handler)
5845 (_("%B: unknown relocation type %d for symbol %s"),
5846 input_bfd, (int) r_type, sym_name);
5847
5848 bfd_set_error (bfd_error_bad_value);
5849 ret = FALSE;
5850 continue;
5851
5852 case R_PPC_NONE:
5853 case R_PPC_TLS:
5854 case R_PPC_EMB_MRKREF:
5855 case R_PPC_GNU_VTINHERIT:
5856 case R_PPC_GNU_VTENTRY:
5857 continue;
5858
5859 /* GOT16 relocations. Like an ADDR16 using the symbol's
5860 address in the GOT as relocation value instead of the
5861 symbol's value itself. Also, create a GOT entry for the
5862 symbol and put the symbol value there. */
5863 case R_PPC_GOT_TLSGD16:
5864 case R_PPC_GOT_TLSGD16_LO:
5865 case R_PPC_GOT_TLSGD16_HI:
5866 case R_PPC_GOT_TLSGD16_HA:
5867 tls_type = TLS_TLS | TLS_GD;
5868 goto dogot;
5869
5870 case R_PPC_GOT_TLSLD16:
5871 case R_PPC_GOT_TLSLD16_LO:
5872 case R_PPC_GOT_TLSLD16_HI:
5873 case R_PPC_GOT_TLSLD16_HA:
5874 tls_type = TLS_TLS | TLS_LD;
5875 goto dogot;
5876
5877 case R_PPC_GOT_TPREL16:
5878 case R_PPC_GOT_TPREL16_LO:
5879 case R_PPC_GOT_TPREL16_HI:
5880 case R_PPC_GOT_TPREL16_HA:
5881 tls_type = TLS_TLS | TLS_TPREL;
5882 goto dogot;
5883
5884 case R_PPC_GOT_DTPREL16:
5885 case R_PPC_GOT_DTPREL16_LO:
5886 case R_PPC_GOT_DTPREL16_HI:
5887 case R_PPC_GOT_DTPREL16_HA:
5888 tls_type = TLS_TLS | TLS_DTPREL;
5889 goto dogot;
5890
5891 case R_PPC_GOT16:
5892 case R_PPC_GOT16_LO:
5893 case R_PPC_GOT16_HI:
5894 case R_PPC_GOT16_HA:
5895 dogot:
5896 {
5897 /* Relocation is to the entry for this symbol in the global
5898 offset table. */
5899 bfd_vma off;
5900 bfd_vma *offp;
5901 unsigned long indx;
5902
5903 if (htab->got == NULL)
5904 abort ();
5905
5906 indx = 0;
5907 if (tls_type == (TLS_TLS | TLS_LD)
5908 && (h == NULL
5909 || !h->def_dynamic))
5910 offp = &htab->tlsld_got.offset;
5911 else if (h != NULL)
5912 {
5913 bfd_boolean dyn;
5914 dyn = htab->elf.dynamic_sections_created;
5915 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5916 || (info->shared
5917 && SYMBOL_REFERENCES_LOCAL (info, h)))
5918 /* This is actually a static link, or it is a
5919 -Bsymbolic link and the symbol is defined
5920 locally, or the symbol was forced to be local
5921 because of a version file. */
5922 ;
5923 else
5924 {
5925 indx = h->dynindx;
5926 unresolved_reloc = FALSE;
5927 }
5928 offp = &h->got.offset;
5929 }
5930 else
5931 {
5932 if (local_got_offsets == NULL)
5933 abort ();
5934 offp = &local_got_offsets[r_symndx];
5935 }
5936
5937 /* The offset must always be a multiple of 4. We use the
5938 least significant bit to record whether we have already
5939 processed this entry. */
5940 off = *offp;
5941 if ((off & 1) != 0)
5942 off &= ~1;
5943 else
5944 {
5945 unsigned int tls_m = (tls_mask
5946 & (TLS_LD | TLS_GD | TLS_DTPREL
5947 | TLS_TPREL | TLS_TPRELGD));
5948
5949 if (offp == &htab->tlsld_got.offset)
5950 tls_m = TLS_LD;
5951 else if (h == NULL
5952 || !h->def_dynamic)
5953 tls_m &= ~TLS_LD;
5954
5955 /* We might have multiple got entries for this sym.
5956 Initialize them all. */
5957 do
5958 {
5959 int tls_ty = 0;
5960
5961 if ((tls_m & TLS_LD) != 0)
5962 {
5963 tls_ty = TLS_TLS | TLS_LD;
5964 tls_m &= ~TLS_LD;
5965 }
5966 else if ((tls_m & TLS_GD) != 0)
5967 {
5968 tls_ty = TLS_TLS | TLS_GD;
5969 tls_m &= ~TLS_GD;
5970 }
5971 else if ((tls_m & TLS_DTPREL) != 0)
5972 {
5973 tls_ty = TLS_TLS | TLS_DTPREL;
5974 tls_m &= ~TLS_DTPREL;
5975 }
5976 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5977 {
5978 tls_ty = TLS_TLS | TLS_TPREL;
5979 tls_m = 0;
5980 }
5981
5982 /* Generate relocs for the dynamic linker. */
5983 if ((info->shared || indx != 0)
5984 && (h == NULL
5985 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5986 || h->root.type != bfd_link_hash_undefweak))
5987 {
5988 outrel.r_offset = (htab->got->output_section->vma
5989 + htab->got->output_offset
5990 + off);
5991 outrel.r_addend = 0;
5992 if (tls_ty & (TLS_LD | TLS_GD))
5993 {
5994 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5995 if (tls_ty == (TLS_TLS | TLS_GD))
5996 {
5997 loc = htab->relgot->contents;
5998 loc += (htab->relgot->reloc_count++
5999 * sizeof (Elf32_External_Rela));
6000 bfd_elf32_swap_reloca_out (output_bfd,
6001 &outrel, loc);
6002 outrel.r_offset += 4;
6003 outrel.r_info
6004 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6005 }
6006 }
6007 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6008 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6009 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6010 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6011 else if (indx == 0)
6012 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6013 else
6014 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6015 if (indx == 0)
6016 {
6017 outrel.r_addend += relocation;
6018 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6019 outrel.r_addend -= htab->elf.tls_sec->vma;
6020 }
6021 loc = htab->relgot->contents;
6022 loc += (htab->relgot->reloc_count++
6023 * sizeof (Elf32_External_Rela));
6024 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6025 }
6026
6027 /* Init the .got section contents if we're not
6028 emitting a reloc. */
6029 else
6030 {
6031 bfd_vma value = relocation;
6032
6033 if (tls_ty == (TLS_TLS | TLS_LD))
6034 value = 1;
6035 else if (tls_ty != 0)
6036 {
6037 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6038 if (tls_ty == (TLS_TLS | TLS_TPREL))
6039 value += DTP_OFFSET - TP_OFFSET;
6040
6041 if (tls_ty == (TLS_TLS | TLS_GD))
6042 {
6043 bfd_put_32 (output_bfd, value,
6044 htab->got->contents + off + 4);
6045 value = 1;
6046 }
6047 }
6048 bfd_put_32 (output_bfd, value,
6049 htab->got->contents + off);
6050 }
6051
6052 off += 4;
6053 if (tls_ty & (TLS_LD | TLS_GD))
6054 off += 4;
6055 }
6056 while (tls_m != 0);
6057
6058 off = *offp;
6059 *offp = off | 1;
6060 }
6061
6062 if (off >= (bfd_vma) -2)
6063 abort ();
6064
6065 if ((tls_type & TLS_TLS) != 0)
6066 {
6067 if (tls_type != (TLS_TLS | TLS_LD))
6068 {
6069 if ((tls_mask & TLS_LD) != 0
6070 && !(h == NULL
6071 || !h->def_dynamic))
6072 off += 8;
6073 if (tls_type != (TLS_TLS | TLS_GD))
6074 {
6075 if ((tls_mask & TLS_GD) != 0)
6076 off += 8;
6077 if (tls_type != (TLS_TLS | TLS_DTPREL))
6078 {
6079 if ((tls_mask & TLS_DTPREL) != 0)
6080 off += 4;
6081 }
6082 }
6083 }
6084 }
6085
6086 relocation = htab->got->output_offset + off;
6087 relocation -= htab->elf.hgot->root.u.def.value;
6088
6089 /* Addends on got relocations don't make much sense.
6090 x+off@got is actually x@got+off, and since the got is
6091 generated by a hash table traversal, the value in the
6092 got at entry m+n bears little relation to the entry m. */
6093 if (addend != 0)
6094 (*_bfd_error_handler)
6095 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6096 input_bfd,
6097 input_section,
6098 (long) rel->r_offset,
6099 howto->name,
6100 sym_name);
6101 }
6102 break;
6103
6104 /* Relocations that need no special processing. */
6105 case R_PPC_LOCAL24PC:
6106 /* It makes no sense to point a local relocation
6107 at a symbol not in this object. */
6108 if (unresolved_reloc)
6109 {
6110 if (! (*info->callbacks->undefined_symbol) (info,
6111 h->root.root.string,
6112 input_bfd,
6113 input_section,
6114 rel->r_offset,
6115 TRUE))
6116 return FALSE;
6117 continue;
6118 }
6119 break;
6120
6121 case R_PPC_DTPREL16:
6122 case R_PPC_DTPREL16_LO:
6123 case R_PPC_DTPREL16_HI:
6124 case R_PPC_DTPREL16_HA:
6125 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6126 break;
6127
6128 /* Relocations that may need to be propagated if this is a shared
6129 object. */
6130 case R_PPC_TPREL16:
6131 case R_PPC_TPREL16_LO:
6132 case R_PPC_TPREL16_HI:
6133 case R_PPC_TPREL16_HA:
6134 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6135 /* The TPREL16 relocs shouldn't really be used in shared
6136 libs as they will result in DT_TEXTREL being set, but
6137 support them anyway. */
6138 goto dodyn;
6139
6140 case R_PPC_TPREL32:
6141 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6142 goto dodyn;
6143
6144 case R_PPC_DTPREL32:
6145 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6146 goto dodyn;
6147
6148 case R_PPC_DTPMOD32:
6149 relocation = 1;
6150 addend = 0;
6151 goto dodyn;
6152
6153 case R_PPC_REL16:
6154 case R_PPC_REL16_LO:
6155 case R_PPC_REL16_HI:
6156 case R_PPC_REL16_HA:
6157 break;
6158
6159 case R_PPC_REL24:
6160 case R_PPC_REL32:
6161 case R_PPC_REL14:
6162 case R_PPC_REL14_BRTAKEN:
6163 case R_PPC_REL14_BRNTAKEN:
6164 /* If these relocations are not to a named symbol, they can be
6165 handled right here, no need to bother the dynamic linker. */
6166 if (SYMBOL_REFERENCES_LOCAL (info, h)
6167 || h == htab->elf.hgot)
6168 break;
6169 /* fall through */
6170
6171 /* Relocations that always need to be propagated if this is a shared
6172 object. */
6173 case R_PPC_ADDR32:
6174 case R_PPC_ADDR24:
6175 case R_PPC_ADDR16:
6176 case R_PPC_ADDR16_LO:
6177 case R_PPC_ADDR16_HI:
6178 case R_PPC_ADDR16_HA:
6179 case R_PPC_ADDR14:
6180 case R_PPC_ADDR14_BRTAKEN:
6181 case R_PPC_ADDR14_BRNTAKEN:
6182 case R_PPC_UADDR32:
6183 case R_PPC_UADDR16:
6184 /* r_symndx will be zero only for relocs against symbols
6185 from removed linkonce sections, or sections discarded by
6186 a linker script. */
6187 dodyn:
6188 if (r_symndx == 0)
6189 break;
6190 /* Fall thru. */
6191
6192 if ((input_section->flags & SEC_ALLOC) == 0)
6193 break;
6194 /* Fall thru. */
6195
6196 if ((info->shared
6197 && (h == NULL
6198 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6199 || h->root.type != bfd_link_hash_undefweak)
6200 && (MUST_BE_DYN_RELOC (r_type)
6201 || !SYMBOL_CALLS_LOCAL (info, h)))
6202 || (ELIMINATE_COPY_RELOCS
6203 && !info->shared
6204 && h != NULL
6205 && h->dynindx != -1
6206 && !h->non_got_ref
6207 && h->def_dynamic
6208 && !h->def_regular))
6209 {
6210 int skip;
6211
6212 #ifdef DEBUG
6213 fprintf (stderr, "ppc_elf_relocate_section needs to "
6214 "create relocation for %s\n",
6215 (h && h->root.root.string
6216 ? h->root.root.string : "<unknown>"));
6217 #endif
6218
6219 /* When generating a shared object, these relocations
6220 are copied into the output file to be resolved at run
6221 time. */
6222 if (sreloc == NULL)
6223 {
6224 const char *name;
6225
6226 name = (bfd_elf_string_from_elf_section
6227 (input_bfd,
6228 elf_elfheader (input_bfd)->e_shstrndx,
6229 elf_section_data (input_section)->rel_hdr.sh_name));
6230 if (name == NULL)
6231 return FALSE;
6232
6233 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6234 && strcmp (bfd_get_section_name (input_bfd,
6235 input_section),
6236 name + 5) == 0);
6237
6238 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6239 BFD_ASSERT (sreloc != NULL);
6240 }
6241
6242 skip = 0;
6243
6244 outrel.r_offset =
6245 _bfd_elf_section_offset (output_bfd, info, input_section,
6246 rel->r_offset);
6247 if (outrel.r_offset == (bfd_vma) -1
6248 || outrel.r_offset == (bfd_vma) -2)
6249 skip = (int) outrel.r_offset;
6250 outrel.r_offset += (input_section->output_section->vma
6251 + input_section->output_offset);
6252
6253 if (skip)
6254 memset (&outrel, 0, sizeof outrel);
6255 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6256 {
6257 unresolved_reloc = FALSE;
6258 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6259 outrel.r_addend = rel->r_addend;
6260 }
6261 else
6262 {
6263 outrel.r_addend = relocation + rel->r_addend;
6264
6265 if (r_type == R_PPC_ADDR32)
6266 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6267 else
6268 {
6269 long indx;
6270
6271 if (bfd_is_abs_section (sec))
6272 indx = 0;
6273 else if (sec == NULL || sec->owner == NULL)
6274 {
6275 bfd_set_error (bfd_error_bad_value);
6276 return FALSE;
6277 }
6278 else
6279 {
6280 asection *osec;
6281
6282 /* We are turning this relocation into one
6283 against a section symbol. It would be
6284 proper to subtract the symbol's value,
6285 osec->vma, from the emitted reloc addend,
6286 but ld.so expects buggy relocs. */
6287 osec = sec->output_section;
6288 indx = elf_section_data (osec)->dynindx;
6289 BFD_ASSERT (indx > 0);
6290 #ifdef DEBUG
6291 if (indx <= 0)
6292 printf ("indx=%d section=%s flags=%08x name=%s\n",
6293 indx, osec->name, osec->flags,
6294 h->root.root.string);
6295 #endif
6296 }
6297
6298 outrel.r_info = ELF32_R_INFO (indx, r_type);
6299 }
6300 }
6301
6302 loc = sreloc->contents;
6303 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6304 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6305
6306 if (skip == -1)
6307 continue;
6308
6309 /* This reloc will be computed at runtime. We clear the memory
6310 so that it contains predictable value. */
6311 if (! skip
6312 && ((input_section->flags & SEC_ALLOC) != 0
6313 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6314 {
6315 relocation = howto->pc_relative ? outrel.r_offset : 0;
6316 addend = 0;
6317 break;
6318 }
6319 }
6320 break;
6321
6322 case R_PPC_RELAX32PC_PLT:
6323 case R_PPC_RELAX32_PLT:
6324 {
6325 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6326
6327 if (htab->plt_type == PLT_NEW)
6328 relocation = (htab->glink->output_section->vma
6329 + htab->glink->output_offset
6330 + ent->glink_offset);
6331 else
6332 relocation = (htab->plt->output_section->vma
6333 + htab->plt->output_offset
6334 + ent->plt.offset);
6335 addend = 0;
6336 }
6337 if (r_type == R_PPC_RELAX32_PLT)
6338 goto relax32;
6339 /* Fall thru */
6340
6341 case R_PPC_RELAX32PC:
6342 relocation -= (input_section->output_section->vma
6343 + input_section->output_offset
6344 + rel->r_offset - 4);
6345 /* Fall thru */
6346
6347 case R_PPC_RELAX32:
6348 relax32:
6349 {
6350 unsigned long t0;
6351 unsigned long t1;
6352
6353 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6354 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6355
6356 /* We're clearing the bits for R_PPC_ADDR16_HA
6357 and R_PPC_ADDR16_LO here. */
6358 t0 &= ~0xffff;
6359 t1 &= ~0xffff;
6360
6361 /* t0 is HA, t1 is LO */
6362 relocation += addend;
6363 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6364 t1 |= relocation & 0xffff;
6365
6366 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6367 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6368 }
6369 continue;
6370
6371 /* Indirect .sdata relocation. */
6372 case R_PPC_EMB_SDAI16:
6373 BFD_ASSERT (htab->sdata[0].section != NULL);
6374 relocation
6375 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6376 h, relocation, rel);
6377 break;
6378
6379 /* Indirect .sdata2 relocation. */
6380 case R_PPC_EMB_SDA2I16:
6381 BFD_ASSERT (htab->sdata[1].section != NULL);
6382 relocation
6383 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6384 h, relocation, rel);
6385 break;
6386
6387 /* Handle the TOC16 reloc. We want to use the offset within the .got
6388 section, not the actual VMA. This is appropriate when generating
6389 an embedded ELF object, for which the .got section acts like the
6390 AIX .toc section. */
6391 case R_PPC_TOC16: /* phony GOT16 relocations */
6392 BFD_ASSERT (sec != NULL);
6393 BFD_ASSERT (bfd_is_und_section (sec)
6394 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6395 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6396
6397 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6398 break;
6399
6400 case R_PPC_PLTREL24:
6401 /* Relocation is to the entry for this symbol in the
6402 procedure linkage table. */
6403 {
6404 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6405
6406 addend = 0;
6407 if (ent == NULL
6408 || htab->plt == NULL)
6409 {
6410 /* We didn't make a PLT entry for this symbol. This
6411 happens when statically linking PIC code, or when
6412 using -Bsymbolic. */
6413 break;
6414 }
6415
6416 unresolved_reloc = FALSE;
6417 if (htab->plt_type == PLT_NEW)
6418 relocation = (htab->glink->output_section->vma
6419 + htab->glink->output_offset
6420 + ent->glink_offset);
6421 else
6422 relocation = (htab->plt->output_section->vma
6423 + htab->plt->output_offset
6424 + ent->plt.offset);
6425 }
6426 break;
6427
6428 /* Relocate against _SDA_BASE_. */
6429 case R_PPC_SDAREL16:
6430 {
6431 const char *name;
6432 struct elf_link_hash_entry *sh;
6433
6434 BFD_ASSERT (sec != NULL);
6435 name = bfd_get_section_name (abfd, sec->output_section);
6436 if (! ((strncmp (name, ".sdata", 6) == 0
6437 && (name[6] == 0 || name[6] == '.'))
6438 || (strncmp (name, ".sbss", 5) == 0
6439 && (name[5] == 0 || name[5] == '.'))))
6440 {
6441 (*_bfd_error_handler)
6442 (_("%B: the target (%s) of a %s relocation is "
6443 "in the wrong output section (%s)"),
6444 input_bfd,
6445 sym_name,
6446 howto->name,
6447 name);
6448 }
6449 sh = htab->sdata[0].sym;
6450 addend -= (sh->root.u.def.value
6451 + sh->root.u.def.section->output_offset
6452 + sh->root.u.def.section->output_section->vma);
6453 }
6454 break;
6455
6456 /* Relocate against _SDA2_BASE_. */
6457 case R_PPC_EMB_SDA2REL:
6458 {
6459 const char *name;
6460 struct elf_link_hash_entry *sh;
6461
6462 BFD_ASSERT (sec != NULL);
6463 name = bfd_get_section_name (abfd, sec->output_section);
6464 if (! (strncmp (name, ".sdata2", 7) == 0
6465 || strncmp (name, ".sbss2", 6) == 0))
6466 {
6467 (*_bfd_error_handler)
6468 (_("%B: the target (%s) of a %s relocation is "
6469 "in the wrong output section (%s)"),
6470 input_bfd,
6471 sym_name,
6472 howto->name,
6473 name);
6474
6475 bfd_set_error (bfd_error_bad_value);
6476 ret = FALSE;
6477 continue;
6478 }
6479 sh = htab->sdata[1].sym;
6480 addend -= (sh->root.u.def.value
6481 + sh->root.u.def.section->output_offset
6482 + sh->root.u.def.section->output_section->vma);
6483 }
6484 break;
6485
6486 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6487 case R_PPC_EMB_SDA21:
6488 case R_PPC_EMB_RELSDA:
6489 {
6490 const char *name;
6491 int reg;
6492 struct elf_link_hash_entry *sh;
6493
6494 BFD_ASSERT (sec != NULL);
6495 name = bfd_get_section_name (abfd, sec->output_section);
6496 if (((strncmp (name, ".sdata", 6) == 0
6497 && (name[6] == 0 || name[6] == '.'))
6498 || (strncmp (name, ".sbss", 5) == 0
6499 && (name[5] == 0 || name[5] == '.'))))
6500 {
6501 reg = 13;
6502 sh = htab->sdata[0].sym;
6503 addend -= (sh->root.u.def.value
6504 + sh->root.u.def.section->output_offset
6505 + sh->root.u.def.section->output_section->vma);
6506 }
6507
6508 else if (strncmp (name, ".sdata2", 7) == 0
6509 || strncmp (name, ".sbss2", 6) == 0)
6510 {
6511 reg = 2;
6512 sh = htab->sdata[1].sym;
6513 addend -= (sh->root.u.def.value
6514 + sh->root.u.def.section->output_offset
6515 + sh->root.u.def.section->output_section->vma);
6516 }
6517
6518 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6519 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6520 {
6521 reg = 0;
6522 }
6523
6524 else
6525 {
6526 (*_bfd_error_handler)
6527 (_("%B: the target (%s) of a %s relocation is "
6528 "in the wrong output section (%s)"),
6529 input_bfd,
6530 sym_name,
6531 howto->name,
6532 name);
6533
6534 bfd_set_error (bfd_error_bad_value);
6535 ret = FALSE;
6536 continue;
6537 }
6538
6539 if (r_type == R_PPC_EMB_SDA21)
6540 { /* fill in register field */
6541 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6542 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6543 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6544 }
6545 }
6546 break;
6547
6548 /* Relocate against the beginning of the section. */
6549 case R_PPC_SECTOFF:
6550 case R_PPC_SECTOFF_LO:
6551 case R_PPC_SECTOFF_HI:
6552 case R_PPC_SECTOFF_HA:
6553 BFD_ASSERT (sec != NULL);
6554 addend -= sec->output_section->vma;
6555 break;
6556
6557 /* Negative relocations. */
6558 case R_PPC_EMB_NADDR32:
6559 case R_PPC_EMB_NADDR16:
6560 case R_PPC_EMB_NADDR16_LO:
6561 case R_PPC_EMB_NADDR16_HI:
6562 case R_PPC_EMB_NADDR16_HA:
6563 addend -= 2 * relocation;
6564 break;
6565
6566 case R_PPC_COPY:
6567 case R_PPC_GLOB_DAT:
6568 case R_PPC_JMP_SLOT:
6569 case R_PPC_RELATIVE:
6570 case R_PPC_PLT32:
6571 case R_PPC_PLTREL32:
6572 case R_PPC_PLT16_LO:
6573 case R_PPC_PLT16_HI:
6574 case R_PPC_PLT16_HA:
6575 case R_PPC_ADDR30:
6576 case R_PPC_EMB_RELSEC16:
6577 case R_PPC_EMB_RELST_LO:
6578 case R_PPC_EMB_RELST_HI:
6579 case R_PPC_EMB_RELST_HA:
6580 case R_PPC_EMB_BIT_FLD:
6581 (*_bfd_error_handler)
6582 (_("%B: relocation %s is not yet supported for symbol %s."),
6583 input_bfd,
6584 howto->name,
6585 sym_name);
6586
6587 bfd_set_error (bfd_error_invalid_operation);
6588 ret = FALSE;
6589 continue;
6590 }
6591
6592 /* Do any further special processing. */
6593 switch (r_type)
6594 {
6595 default:
6596 break;
6597
6598 case R_PPC_ADDR16_HA:
6599 case R_PPC_REL16_HA:
6600 case R_PPC_GOT16_HA:
6601 case R_PPC_PLT16_HA:
6602 case R_PPC_SECTOFF_HA:
6603 case R_PPC_TPREL16_HA:
6604 case R_PPC_DTPREL16_HA:
6605 case R_PPC_GOT_TLSGD16_HA:
6606 case R_PPC_GOT_TLSLD16_HA:
6607 case R_PPC_GOT_TPREL16_HA:
6608 case R_PPC_GOT_DTPREL16_HA:
6609 case R_PPC_EMB_NADDR16_HA:
6610 case R_PPC_EMB_RELST_HA:
6611 /* It's just possible that this symbol is a weak symbol
6612 that's not actually defined anywhere. In that case,
6613 'sec' would be NULL, and we should leave the symbol
6614 alone (it will be set to zero elsewhere in the link). */
6615 if (sec != NULL)
6616 /* Add 0x10000 if sign bit in 0:15 is set.
6617 Bits 0:15 are not used. */
6618 addend += 0x8000;
6619 break;
6620 }
6621
6622 #ifdef DEBUG
6623 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6624 "offset = %ld, addend = %ld\n",
6625 howto->name,
6626 (int) r_type,
6627 sym_name,
6628 r_symndx,
6629 (long) rel->r_offset,
6630 (long) addend);
6631 #endif
6632
6633 if (unresolved_reloc
6634 && !((input_section->flags & SEC_DEBUGGING) != 0
6635 && h->def_dynamic))
6636 {
6637 (*_bfd_error_handler)
6638 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6639 input_bfd,
6640 input_section,
6641 (long) rel->r_offset,
6642 howto->name,
6643 sym_name);
6644 ret = FALSE;
6645 }
6646
6647 r = _bfd_final_link_relocate (howto,
6648 input_bfd,
6649 input_section,
6650 contents,
6651 rel->r_offset,
6652 relocation,
6653 addend);
6654
6655 if (r != bfd_reloc_ok)
6656 {
6657 if (r == bfd_reloc_overflow)
6658 {
6659 if (warned)
6660 continue;
6661 if (h != NULL
6662 && h->root.type == bfd_link_hash_undefweak
6663 && howto->pc_relative)
6664 {
6665 /* Assume this is a call protected by other code that
6666 detect the symbol is undefined. If this is the case,
6667 we can safely ignore the overflow. If not, the
6668 program is hosed anyway, and a little warning isn't
6669 going to help. */
6670
6671 continue;
6672 }
6673
6674 if (! (*info->callbacks->reloc_overflow) (info,
6675 (h ? &h->root : NULL),
6676 sym_name,
6677 howto->name,
6678 rel->r_addend,
6679 input_bfd,
6680 input_section,
6681 rel->r_offset))
6682 return FALSE;
6683 }
6684 else
6685 {
6686 (*_bfd_error_handler)
6687 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6688 input_bfd, input_section,
6689 (long) rel->r_offset, howto->name, sym_name, (int) r);
6690 ret = FALSE;
6691 }
6692 }
6693 }
6694
6695 #ifdef DEBUG
6696 fprintf (stderr, "\n");
6697 #endif
6698
6699 return ret;
6700 }
6701 \f
6702 #define PPC_LO(v) ((v) & 0xffff)
6703 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6704 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6705
6706 /* Finish up dynamic symbol handling. We set the contents of various
6707 dynamic sections here. */
6708
6709 static bfd_boolean
6710 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6711 struct bfd_link_info *info,
6712 struct elf_link_hash_entry *h,
6713 Elf_Internal_Sym *sym)
6714 {
6715 struct ppc_elf_link_hash_table *htab;
6716 struct plt_entry *ent;
6717 bfd_boolean doneone;
6718
6719 #ifdef DEBUG
6720 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6721 h->root.root.string);
6722 #endif
6723
6724 htab = ppc_elf_hash_table (info);
6725 BFD_ASSERT (htab->elf.dynobj != NULL);
6726
6727 doneone = FALSE;
6728 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6729 if (ent->plt.offset != (bfd_vma) -1)
6730 {
6731 if (!doneone)
6732 {
6733 Elf_Internal_Rela rela;
6734 bfd_byte *loc;
6735 bfd_vma reloc_index;
6736
6737 if (htab->plt_type == PLT_NEW)
6738 reloc_index = ent->plt.offset / 4;
6739 else
6740 {
6741 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6742 / htab->plt_slot_size);
6743 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6744 && htab->plt_type == PLT_OLD)
6745 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6746 }
6747
6748 /* This symbol has an entry in the procedure linkage table.
6749 Set it up. */
6750 if (htab->plt_type == PLT_VXWORKS)
6751 {
6752 bfd_vma got_offset;
6753 const bfd_vma *plt_entry;
6754
6755 /* The first three entries in .got.plt are reserved. */
6756 got_offset = (reloc_index + 3) * 4;
6757
6758 /* Use the right PLT. */
6759 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6760 : ppc_elf_vxworks_plt_entry;
6761
6762 /* Fill in the .plt on VxWorks. */
6763 if (info->shared)
6764 {
6765 bfd_vma got_offset_hi = (got_offset >> 16)
6766 + ((got_offset & 0x8000) >> 15);
6767
6768 bfd_put_32 (output_bfd,
6769 plt_entry[0] | (got_offset_hi & 0xffff),
6770 htab->plt->contents + ent->plt.offset + 0);
6771 bfd_put_32 (output_bfd,
6772 plt_entry[1] | (got_offset & 0xffff),
6773 htab->plt->contents + ent->plt.offset + 4);
6774 }
6775 else
6776 {
6777 bfd_vma got_loc
6778 = (got_offset
6779 + htab->elf.hgot->root.u.def.value
6780 + htab->elf.hgot->root.u.def.section->output_offset
6781 + htab->elf.hgot->root.u.def.section->output_section->vma);
6782 bfd_vma got_loc_hi = (got_loc >> 16)
6783 + ((got_loc & 0x8000) >> 15);
6784
6785 bfd_put_32 (output_bfd,
6786 plt_entry[0] | (got_loc_hi & 0xffff),
6787 htab->plt->contents + ent->plt.offset + 0);
6788 bfd_put_32 (output_bfd,
6789 plt_entry[1] | (got_loc & 0xffff),
6790 htab->plt->contents + ent->plt.offset + 4);
6791 }
6792
6793 bfd_put_32 (output_bfd, plt_entry[2],
6794 htab->plt->contents + ent->plt.offset + 8);
6795 bfd_put_32 (output_bfd, plt_entry[3],
6796 htab->plt->contents + ent->plt.offset + 12);
6797
6798 /* This instruction is an immediate load. The value loaded is
6799 the byte offset of the R_PPC_JMP_SLOT relocation from the
6800 start of the .rela.plt section. The value is stored in the
6801 low-order 16 bits of the load instruction. */
6802 /* NOTE: It appears that this is now an index rather than a
6803 prescaled offset. */
6804 bfd_put_32 (output_bfd,
6805 plt_entry[4] | reloc_index,
6806 htab->plt->contents + ent->plt.offset + 16);
6807 /* This instruction is a PC-relative branch whose target is
6808 the start of the PLT section. The address of this branch
6809 instruction is 20 bytes beyond the start of this PLT entry.
6810 The address is encoded in bits 6-29, inclusive. The value
6811 stored is right-shifted by two bits, permitting a 26-bit
6812 offset. */
6813 bfd_put_32 (output_bfd,
6814 (plt_entry[5]
6815 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6816 htab->plt->contents + ent->plt.offset + 20);
6817 bfd_put_32 (output_bfd, plt_entry[6],
6818 htab->plt->contents + ent->plt.offset + 24);
6819 bfd_put_32 (output_bfd, plt_entry[7],
6820 htab->plt->contents + ent->plt.offset + 28);
6821
6822 /* Fill in the GOT entry corresponding to this PLT slot with
6823 the address immediately after the the "bctr" instruction
6824 in this PLT entry. */
6825 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6826 + htab->plt->output_offset
6827 + ent->plt.offset + 16),
6828 htab->sgotplt->contents + got_offset);
6829
6830 if (!info->shared)
6831 {
6832 /* Fill in a couple of entries in .rela.plt.unloaded. */
6833 loc = htab->srelplt2->contents
6834 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6835 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6836 * sizeof (Elf32_External_Rela));
6837
6838 /* Provide the @ha relocation for the first instruction. */
6839 rela.r_offset = (htab->plt->output_section->vma
6840 + htab->plt->output_offset
6841 + ent->plt.offset + 2);
6842 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6843 R_PPC_ADDR16_HA);
6844 rela.r_addend = got_offset;
6845 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6846 loc += sizeof (Elf32_External_Rela);
6847
6848 /* Provide the @l relocation for the second instruction. */
6849 rela.r_offset = (htab->plt->output_section->vma
6850 + htab->plt->output_offset
6851 + ent->plt.offset + 6);
6852 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6853 R_PPC_ADDR16_LO);
6854 rela.r_addend = got_offset;
6855 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6856 loc += sizeof (Elf32_External_Rela);
6857
6858 /* Provide a relocation for the GOT entry corresponding to this
6859 PLT slot. Point it at the middle of the .plt entry. */
6860 rela.r_offset = (htab->sgotplt->output_section->vma
6861 + htab->sgotplt->output_offset
6862 + got_offset);
6863 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6864 R_PPC_ADDR32);
6865 rela.r_addend = ent->plt.offset + 16;
6866 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6867 }
6868
6869 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6870 In particular, the offset for the relocation is not the
6871 address of the PLT entry for this function, as specified
6872 by the ABI. Instead, the offset is set to the address of
6873 the GOT slot for this function. See EABI 4.4.4.1. */
6874 rela.r_offset = (htab->sgotplt->output_section->vma
6875 + htab->sgotplt->output_offset
6876 + got_offset);
6877
6878 }
6879 else
6880 {
6881 rela.r_offset = (htab->plt->output_section->vma
6882 + htab->plt->output_offset
6883 + ent->plt.offset);
6884 if (htab->plt_type == PLT_OLD)
6885 {
6886 /* We don't need to fill in the .plt. The ppc dynamic
6887 linker will fill it in. */
6888 }
6889 else
6890 {
6891 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6892 + htab->glink->output_section->vma
6893 + htab->glink->output_offset);
6894 bfd_put_32 (output_bfd, val,
6895 htab->plt->contents + ent->plt.offset);
6896 }
6897 }
6898
6899 /* Fill in the entry in the .rela.plt section. */
6900 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6901 rela.r_addend = 0;
6902
6903 loc = (htab->relplt->contents
6904 + reloc_index * sizeof (Elf32_External_Rela));
6905 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6906
6907 if (!h->def_regular)
6908 {
6909 /* Mark the symbol as undefined, rather than as defined in
6910 the .plt section. Leave the value alone. */
6911 sym->st_shndx = SHN_UNDEF;
6912 /* If the symbol is weak, we do need to clear the value.
6913 Otherwise, the PLT entry would provide a definition for
6914 the symbol even if the symbol wasn't defined anywhere,
6915 and so the symbol would never be NULL. */
6916 if (!h->ref_regular_nonweak)
6917 sym->st_value = 0;
6918 }
6919 doneone = TRUE;
6920 }
6921
6922 if (htab->plt_type == PLT_NEW)
6923 {
6924 bfd_vma plt;
6925 unsigned char *p;
6926
6927 plt = (ent->plt.offset
6928 + htab->plt->output_section->vma
6929 + htab->plt->output_offset);
6930 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6931
6932 if (info->shared || info->pie)
6933 {
6934 bfd_vma got = 0;
6935
6936 if (ent->addend >= 32768)
6937 got = (ent->addend
6938 + ent->sec->output_section->vma
6939 + ent->sec->output_offset);
6940 else if (htab->elf.hgot != NULL)
6941 got = (htab->elf.hgot->root.u.def.value
6942 + htab->elf.hgot->root.u.def.section->output_section->vma
6943 + htab->elf.hgot->root.u.def.section->output_offset);
6944
6945 plt -= got;
6946
6947 if (plt + 0x8000 < 0x10000)
6948 {
6949 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6950 p += 4;
6951 bfd_put_32 (output_bfd, MTCTR_11, p);
6952 p += 4;
6953 bfd_put_32 (output_bfd, BCTR, p);
6954 p += 4;
6955 bfd_put_32 (output_bfd, NOP, p);
6956 p += 4;
6957 }
6958 else
6959 {
6960 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6961 p += 4;
6962 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6963 p += 4;
6964 bfd_put_32 (output_bfd, MTCTR_11, p);
6965 p += 4;
6966 bfd_put_32 (output_bfd, BCTR, p);
6967 p += 4;
6968 }
6969 }
6970 else
6971 {
6972 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6973 p += 4;
6974 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6975 p += 4;
6976 bfd_put_32 (output_bfd, MTCTR_11, p);
6977 p += 4;
6978 bfd_put_32 (output_bfd, BCTR, p);
6979 p += 4;
6980
6981 /* We only need one non-PIC glink stub. */
6982 break;
6983 }
6984 }
6985 else
6986 break;
6987 }
6988
6989 if (h->needs_copy)
6990 {
6991 asection *s;
6992 Elf_Internal_Rela rela;
6993 bfd_byte *loc;
6994
6995 /* This symbols needs a copy reloc. Set it up. */
6996
6997 #ifdef DEBUG
6998 fprintf (stderr, ", copy");
6999 #endif
7000
7001 BFD_ASSERT (h->dynindx != -1);
7002
7003 if (ppc_elf_hash_entry (h)->has_sda_refs)
7004 s = htab->relsbss;
7005 else
7006 s = htab->relbss;
7007 BFD_ASSERT (s != NULL);
7008
7009 rela.r_offset = (h->root.u.def.value
7010 + h->root.u.def.section->output_section->vma
7011 + h->root.u.def.section->output_offset);
7012 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7013 rela.r_addend = 0;
7014 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7015 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7016 }
7017
7018 #ifdef DEBUG
7019 fprintf (stderr, "\n");
7020 #endif
7021
7022 /* Mark some specially defined symbols as absolute. */
7023 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7024 || (!htab->is_vxworks
7025 && (h == htab->elf.hgot
7026 || strcmp (h->root.root.string,
7027 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7028 sym->st_shndx = SHN_ABS;
7029
7030 return TRUE;
7031 }
7032 \f
7033 static enum elf_reloc_type_class
7034 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7035 {
7036 switch (ELF32_R_TYPE (rela->r_info))
7037 {
7038 case R_PPC_RELATIVE:
7039 return reloc_class_relative;
7040 case R_PPC_REL24:
7041 case R_PPC_ADDR24:
7042 case R_PPC_JMP_SLOT:
7043 return reloc_class_plt;
7044 case R_PPC_COPY:
7045 return reloc_class_copy;
7046 default:
7047 return reloc_class_normal;
7048 }
7049 }
7050 \f
7051 /* Finish up the dynamic sections. */
7052
7053 static bfd_boolean
7054 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7055 struct bfd_link_info *info)
7056 {
7057 asection *sdyn;
7058 asection *splt;
7059 struct ppc_elf_link_hash_table *htab;
7060 bfd_vma got;
7061 bfd * dynobj;
7062
7063 #ifdef DEBUG
7064 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7065 #endif
7066
7067 htab = ppc_elf_hash_table (info);
7068 dynobj = elf_hash_table (info)->dynobj;
7069 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7070 if (htab->is_vxworks)
7071 splt = bfd_get_section_by_name (dynobj, ".plt");
7072 else
7073 splt = NULL;
7074
7075 got = 0;
7076 if (htab->elf.hgot != NULL)
7077 got = (htab->elf.hgot->root.u.def.value
7078 + htab->elf.hgot->root.u.def.section->output_section->vma
7079 + htab->elf.hgot->root.u.def.section->output_offset);
7080
7081 if (htab->elf.dynamic_sections_created)
7082 {
7083 Elf32_External_Dyn *dyncon, *dynconend;
7084
7085 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7086
7087 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7088 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7089 for (; dyncon < dynconend; dyncon++)
7090 {
7091 Elf_Internal_Dyn dyn;
7092 asection *s;
7093
7094 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7095
7096 switch (dyn.d_tag)
7097 {
7098 case DT_PLTGOT:
7099 if (htab->is_vxworks)
7100 s = htab->sgotplt;
7101 else
7102 s = htab->plt;
7103 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7104 break;
7105
7106 case DT_PLTRELSZ:
7107 dyn.d_un.d_val = htab->relplt->size;
7108 break;
7109
7110 case DT_JMPREL:
7111 s = htab->relplt;
7112 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7113 break;
7114
7115 case DT_PPC_GOT:
7116 dyn.d_un.d_ptr = got;
7117 break;
7118
7119 case DT_RELASZ:
7120 if (htab->is_vxworks)
7121 {
7122 if (htab->relplt)
7123 dyn.d_un.d_ptr -= htab->relplt->size;
7124 break;
7125 }
7126 continue;
7127
7128 default:
7129 continue;
7130 }
7131
7132 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7133 }
7134 }
7135
7136 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7137 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7138 if (htab->got != NULL)
7139 {
7140 unsigned char *p = htab->got->contents;
7141 bfd_vma val;
7142
7143 p += htab->elf.hgot->root.u.def.value;
7144 if (htab->plt_type == PLT_OLD)
7145 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7146
7147 val = 0;
7148 if (sdyn != NULL)
7149 val = sdyn->output_section->vma + sdyn->output_offset;
7150 bfd_put_32 (output_bfd, val, p);
7151
7152 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7153 }
7154
7155 /* Fill in the first entry in the VxWorks procedure linkage table. */
7156 if (splt && splt->size > 0)
7157 {
7158 /* Use the right PLT. */
7159 static const bfd_vma *plt_entry = NULL;
7160 plt_entry = info->shared ?
7161 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7162
7163 if (!info->shared)
7164 {
7165 bfd_vma got_value =
7166 (htab->elf.hgot->root.u.def.section->output_section->vma
7167 + htab->elf.hgot->root.u.def.section->output_offset
7168 + htab->elf.hgot->root.u.def.value);
7169 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7170
7171 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7172 splt->contents + 0);
7173 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7174 splt->contents + 4);
7175 }
7176 else
7177 {
7178 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7179 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7180 }
7181 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7182 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7183 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7184 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7185 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7186 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7187
7188 if (! info->shared)
7189 {
7190 Elf_Internal_Rela rela;
7191 bfd_byte *loc;
7192
7193 loc = htab->srelplt2->contents;
7194
7195 /* Output the @ha relocation for the first instruction. */
7196 rela.r_offset = (htab->plt->output_section->vma
7197 + htab->plt->output_offset
7198 + 2);
7199 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7200 rela.r_addend = 0;
7201 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7202 loc += sizeof (Elf32_External_Rela);
7203
7204 /* Output the @l relocation for the second instruction. */
7205 rela.r_offset = (htab->plt->output_section->vma
7206 + htab->plt->output_offset
7207 + 6);
7208 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7209 rela.r_addend = 0;
7210 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7211 loc += sizeof (Elf32_External_Rela);
7212
7213 /* Fix up the remaining relocations. They may have the wrong
7214 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7215 in which symbols were output. */
7216 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7217 {
7218 Elf_Internal_Rela rel;
7219
7220 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7221 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7222 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7223 loc += sizeof (Elf32_External_Rela);
7224
7225 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7226 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7227 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7228 loc += sizeof (Elf32_External_Rela);
7229
7230 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7231 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7232 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7233 loc += sizeof (Elf32_External_Rela);
7234 }
7235 }
7236 }
7237
7238 if (htab->glink != NULL && htab->glink->contents != NULL)
7239 {
7240 unsigned char *p;
7241 unsigned char *endp;
7242 bfd_vma res0;
7243 unsigned int i;
7244
7245 /*
7246 * PIC glink code is the following:
7247 *
7248 * # ith PLT code stub.
7249 * addis 11,30,(plt+(i-1)*4-got)@ha
7250 * lwz 11,(plt+(i-1)*4-got)@l(11)
7251 * mtctr 11
7252 * bctr
7253 *
7254 * # A table of branches, one for each plt entry.
7255 * # The idea is that the plt call stub loads ctr (and r11) with these
7256 * # addresses, so (r11 - res_0) gives the plt index * 4.
7257 * res_0: b PLTresolve
7258 * res_1: b PLTresolve
7259 * .
7260 * # Some number of entries towards the end can be nops
7261 * res_n_m3: nop
7262 * res_n_m2: nop
7263 * res_n_m1:
7264 *
7265 * PLTresolve:
7266 * addis 11,11,(1f-res_0)@ha
7267 * mflr 0
7268 * bcl 20,31,1f
7269 * 1: addi 11,11,(1b-res_0)@l
7270 * mflr 12
7271 * mtlr 0
7272 * sub 11,11,12 # r11 = index * 4
7273 * addis 12,12,(got+4-1b)@ha
7274 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7275 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7276 * mtctr 0
7277 * add 0,11,11
7278 * add 11,0,11 # r11 = index * 12 = reloc offset.
7279 * bctr
7280 */
7281 static const unsigned int pic_plt_resolve[] =
7282 {
7283 ADDIS_11_11,
7284 MFLR_0,
7285 BCL_20_31,
7286 ADDI_11_11,
7287 MFLR_12,
7288 MTLR_0,
7289 SUB_11_11_12,
7290 ADDIS_12_12,
7291 LWZ_0_12,
7292 LWZ_12_12,
7293 MTCTR_0,
7294 ADD_0_11_11,
7295 ADD_11_0_11,
7296 BCTR,
7297 NOP,
7298 NOP
7299 };
7300
7301 static const unsigned int plt_resolve[] =
7302 {
7303 LIS_12,
7304 ADDIS_11_11,
7305 LWZ_0_12,
7306 ADDI_11_11,
7307 MTCTR_0,
7308 ADD_0_11_11,
7309 LWZ_12_12,
7310 ADD_11_0_11,
7311 BCTR,
7312 NOP,
7313 NOP,
7314 NOP,
7315 NOP,
7316 NOP,
7317 NOP,
7318 NOP
7319 };
7320
7321 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7322 abort ();
7323 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7324 abort ();
7325
7326 /* Build the branch table, one for each plt entry (less one),
7327 and perhaps some padding. */
7328 p = htab->glink->contents;
7329 p += htab->glink_pltresolve;
7330 endp = htab->glink->contents;
7331 endp += htab->glink->size - GLINK_PLTRESOLVE;
7332 while (p < endp - 8 * 4)
7333 {
7334 bfd_put_32 (output_bfd, B + endp - p, p);
7335 p += 4;
7336 }
7337 while (p < endp)
7338 {
7339 bfd_put_32 (output_bfd, NOP, p);
7340 p += 4;
7341 }
7342
7343 res0 = (htab->glink_pltresolve
7344 + htab->glink->output_section->vma
7345 + htab->glink->output_offset);
7346
7347 /* Last comes the PLTresolve stub. */
7348 if (info->shared || info->pie)
7349 {
7350 bfd_vma bcl;
7351
7352 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7353 {
7354 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7355 p += 4;
7356 }
7357 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7358
7359 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7360 + htab->glink->output_section->vma
7361 + htab->glink->output_offset);
7362
7363 bfd_put_32 (output_bfd,
7364 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7365 bfd_put_32 (output_bfd,
7366 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7367 bfd_put_32 (output_bfd,
7368 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7369 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7370 {
7371 bfd_put_32 (output_bfd,
7372 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7373 bfd_put_32 (output_bfd,
7374 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7375 }
7376 else
7377 {
7378 bfd_put_32 (output_bfd,
7379 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7380 bfd_put_32 (output_bfd,
7381 LWZ_12_12 + 4, p + 9*4);
7382 }
7383 }
7384 else
7385 {
7386 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7387 {
7388 bfd_put_32 (output_bfd, plt_resolve[i], p);
7389 p += 4;
7390 }
7391 p -= 4 * ARRAY_SIZE (plt_resolve);
7392
7393 bfd_put_32 (output_bfd,
7394 LIS_12 + PPC_HA (got + 4), p + 0*4);
7395 bfd_put_32 (output_bfd,
7396 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7397 bfd_put_32 (output_bfd,
7398 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7399 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7400 {
7401 bfd_put_32 (output_bfd,
7402 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7403 bfd_put_32 (output_bfd,
7404 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7405 }
7406 else
7407 {
7408 bfd_put_32 (output_bfd,
7409 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7410 bfd_put_32 (output_bfd,
7411 LWZ_12_12 + 4, p + 6*4);
7412 }
7413 }
7414 }
7415
7416 return TRUE;
7417 }
7418 \f
7419 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7420 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7421 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7422 #define TARGET_BIG_NAME "elf32-powerpc"
7423 #define ELF_ARCH bfd_arch_powerpc
7424 #define ELF_MACHINE_CODE EM_PPC
7425 #ifdef __QNXTARGET__
7426 #define ELF_MAXPAGESIZE 0x1000
7427 #else
7428 #define ELF_MAXPAGESIZE 0x10000
7429 #endif
7430 #define ELF_MINPAGESIZE 0x1000
7431 #define elf_info_to_howto ppc_elf_info_to_howto
7432
7433 #ifdef EM_CYGNUS_POWERPC
7434 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7435 #endif
7436
7437 #ifdef EM_PPC_OLD
7438 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7439 #endif
7440
7441 #define elf_backend_plt_not_loaded 1
7442 #define elf_backend_can_gc_sections 1
7443 #define elf_backend_can_refcount 1
7444 #define elf_backend_rela_normal 1
7445
7446 #define bfd_elf32_mkobject ppc_elf_mkobject
7447 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7448 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7449 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7450 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7451 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7452
7453 #define elf_backend_object_p ppc_elf_object_p
7454 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7455 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7456 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7457 #define elf_backend_relocate_section ppc_elf_relocate_section
7458 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7459 #define elf_backend_check_relocs ppc_elf_check_relocs
7460 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7461 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7462 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7463 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7464 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7465 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7466 #define elf_backend_fake_sections ppc_elf_fake_sections
7467 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7468 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7469 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7470 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7471 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7472 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7473 #define elf_backend_write_section ppc_elf_write_section
7474 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7475 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7476 #define elf_backend_action_discarded ppc_elf_action_discarded
7477
7478 #include "elf32-target.h"
7479
7480 /* VxWorks Target */
7481
7482 #undef TARGET_LITTLE_SYM
7483 #undef TARGET_LITTLE_NAME
7484
7485 #undef TARGET_BIG_SYM
7486 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7487 #undef TARGET_BIG_NAME
7488 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7489
7490 /* VxWorks uses the elf default section flags for .plt. */
7491 static const struct bfd_elf_special_section *
7492 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7493 {
7494 if (sec->name == NULL)
7495 return NULL;
7496
7497 if (strcmp (sec->name, ".plt") == 0)
7498 return _bfd_elf_get_sec_type_attr (abfd, sec);
7499
7500 return ppc_elf_get_sec_type_attr (abfd, sec);
7501 }
7502
7503 /* Like ppc_elf_link_hash_table_create, but overrides
7504 appropriately for VxWorks. */
7505 static struct bfd_link_hash_table *
7506 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7507 {
7508 struct bfd_link_hash_table *ret;
7509
7510 ret = ppc_elf_link_hash_table_create (abfd);
7511 if (ret)
7512 {
7513 struct ppc_elf_link_hash_table *htab
7514 = (struct ppc_elf_link_hash_table *)ret;
7515 htab->is_vxworks = 1;
7516 htab->plt_type = PLT_VXWORKS;
7517 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7518 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7519 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7520 }
7521 return ret;
7522 }
7523
7524 /* Tweak magic VxWorks symbols as they are loaded. */
7525 static bfd_boolean
7526 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7527 struct bfd_link_info *info,
7528 Elf_Internal_Sym *sym,
7529 const char **namep ATTRIBUTE_UNUSED,
7530 flagword *flagsp ATTRIBUTE_UNUSED,
7531 asection **secp,
7532 bfd_vma *valp)
7533 {
7534 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7535 valp))
7536 return FALSE;
7537
7538 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7539 }
7540
7541 static void
7542 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7543 {
7544 ppc_elf_final_write_processing(abfd, linker);
7545 elf_vxworks_final_write_processing(abfd, linker);
7546 }
7547
7548 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7549 define it. */
7550 #undef elf_backend_want_plt_sym
7551 #define elf_backend_want_plt_sym 1
7552 #undef elf_backend_want_got_plt
7553 #define elf_backend_want_got_plt 1
7554 #undef elf_backend_got_symbol_offset
7555 #define elf_backend_got_symbol_offset 0
7556 #undef elf_backend_plt_not_loaded
7557 #define elf_backend_plt_not_loaded 0
7558 #undef elf_backend_plt_readonly
7559 #define elf_backend_plt_readonly 1
7560 #undef elf_backend_got_header_size
7561 #define elf_backend_got_header_size 12
7562
7563 #undef bfd_elf32_bfd_link_hash_table_create
7564 #define bfd_elf32_bfd_link_hash_table_create \
7565 ppc_elf_vxworks_link_hash_table_create
7566 #undef elf_backend_add_symbol_hook
7567 #define elf_backend_add_symbol_hook \
7568 ppc_elf_vxworks_add_symbol_hook
7569 #undef elf_backend_link_output_symbol_hook
7570 #define elf_backend_link_output_symbol_hook \
7571 elf_vxworks_link_output_symbol_hook
7572 #undef elf_backend_final_write_processing
7573 #define elf_backend_final_write_processing \
7574 ppc_elf_vxworks_final_write_processing
7575 #undef elf_backend_get_sec_type_attr
7576 #define elf_backend_get_sec_type_attr \
7577 ppc_elf_vxworks_get_sec_type_attr
7578 #undef elf_backend_emit_relocs
7579 #define elf_backend_emit_relocs \
7580 elf_vxworks_emit_relocs
7581
7582 #undef elf32_bed
7583 #define elf32_bed ppc_elf_vxworks_bed
7584
7585 #include "elf32-target.h"
GDB Binutils - Deliverables
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