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* mn10300-tdep.c (mn10300_analyze_prologue): Implement backtrack
[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 /* PPC ELF linker hash table. */
2317
2318 struct ppc_elf_link_hash_table
2319 {
2320 struct elf_link_hash_table elf;
2321
2322 /* Short-cuts to get to dynamic linker sections. */
2323 asection *got;
2324 asection *relgot;
2325 asection *glink;
2326 asection *plt;
2327 asection *relplt;
2328 asection *dynbss;
2329 asection *relbss;
2330 asection *dynsbss;
2331 asection *relsbss;
2332 elf_linker_section_t sdata[2];
2333 asection *sbss;
2334
2335 /* Shortcut to .__tls_get_addr. */
2336 struct elf_link_hash_entry *tls_get_addr;
2337
2338 /* TLS local dynamic got entry handling. */
2339 union {
2340 bfd_signed_vma refcount;
2341 bfd_vma offset;
2342 } tlsld_got;
2343
2344 /* Offset of PltResolve function in glink. */
2345 bfd_vma glink_pltresolve;
2346
2347 /* Size of reserved GOT entries. */
2348 unsigned int got_header_size;
2349 /* Non-zero if allocating the header left a gap. */
2350 unsigned int got_gap;
2351
2352 /* Whether to use new plt/got layout or not. */
2353 unsigned int new_plt:1;
2354 unsigned int old_plt:1;
2355
2356 /* Set if we should emit symbols for stubs. */
2357 unsigned int emit_stub_syms:1;
2358
2359 /* Small local sym to section mapping cache. */
2360 struct sym_sec_cache sym_sec;
2361
2362 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2363 asection *srelplt2;
2364
2365 /* The .got.plt section (VxWorks only)*/
2366 asection *sgotplt;
2367
2368 /* True if the target system is VxWorks. */
2369 int is_vxworks;
2370
2371 /* The size of PLT entries. */
2372 int plt_entry_size;
2373 /* The distance between adjacent PLT slots. */
2374 int plt_slot_size;
2375 /* The size of the first PLT entry. */
2376 int plt_initial_entry_size;
2377 };
2378
2379 /* Get the PPC ELF linker hash table from a link_info structure. */
2380
2381 #define ppc_elf_hash_table(p) \
2382 ((struct ppc_elf_link_hash_table *) (p)->hash)
2383
2384 /* Create an entry in a PPC ELF linker hash table. */
2385
2386 static struct bfd_hash_entry *
2387 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2388 struct bfd_hash_table *table,
2389 const char *string)
2390 {
2391 /* Allocate the structure if it has not already been allocated by a
2392 subclass. */
2393 if (entry == NULL)
2394 {
2395 entry = bfd_hash_allocate (table,
2396 sizeof (struct ppc_elf_link_hash_entry));
2397 if (entry == NULL)
2398 return entry;
2399 }
2400
2401 /* Call the allocation method of the superclass. */
2402 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2403 if (entry != NULL)
2404 {
2405 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2406 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2407 ppc_elf_hash_entry (entry)->tls_mask = 0;
2408 }
2409
2410 return entry;
2411 }
2412
2413 /* Create a PPC ELF linker hash table. */
2414
2415 static struct bfd_link_hash_table *
2416 ppc_elf_link_hash_table_create (bfd *abfd)
2417 {
2418 struct ppc_elf_link_hash_table *ret;
2419
2420 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2421 if (ret == NULL)
2422 return NULL;
2423
2424 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2425 ppc_elf_link_hash_newfunc))
2426 {
2427 free (ret);
2428 return NULL;
2429 }
2430
2431 ret->elf.init_plt_refcount.refcount = 0;
2432 ret->elf.init_plt_refcount.glist = NULL;
2433 ret->elf.init_plt_offset.offset = 0;
2434 ret->elf.init_plt_offset.glist = NULL;
2435
2436 ret->sdata[0].name = ".sdata";
2437 ret->sdata[0].sym_name = "_SDA_BASE_";
2438 ret->sdata[0].bss_name = ".sbss";
2439
2440 ret->sdata[1].name = ".sdata2";
2441 ret->sdata[1].sym_name = "_SDA2_BASE_";
2442 ret->sdata[1].bss_name = ".sbss2";
2443
2444 ret->plt_entry_size = 12;
2445 ret->plt_slot_size = 8;
2446 ret->plt_initial_entry_size = 72;
2447
2448 ret->is_vxworks = 0;
2449
2450 return &ret->elf.root;
2451 }
2452
2453 /* Create .got and the related sections. */
2454
2455 static bfd_boolean
2456 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2457 {
2458 struct ppc_elf_link_hash_table *htab;
2459 asection *s;
2460 flagword flags;
2461
2462 if (!_bfd_elf_create_got_section (abfd, info))
2463 return FALSE;
2464
2465 htab = ppc_elf_hash_table (info);
2466 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2467 if (s == NULL)
2468 abort ();
2469
2470 if (htab->is_vxworks)
2471 {
2472 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2473 if (!htab->sgotplt)
2474 abort ();
2475 }
2476 else
2477 {
2478 /* The powerpc .got has a blrl instruction in it. Mark it
2479 executable. */
2480 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2481 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2482 if (!bfd_set_section_flags (abfd, s, flags))
2483 return FALSE;
2484 }
2485
2486 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2487 | SEC_LINKER_CREATED | SEC_READONLY);
2488 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2489 if (!htab->relgot
2490 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2491 return FALSE;
2492
2493 return TRUE;
2494 }
2495
2496 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2497 to output sections (just like _bfd_elf_create_dynamic_sections has
2498 to create .dynbss and .rela.bss). */
2499
2500 static bfd_boolean
2501 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2502 {
2503 struct ppc_elf_link_hash_table *htab;
2504 asection *s;
2505 flagword flags;
2506
2507 htab = ppc_elf_hash_table (info);
2508
2509 if (htab->got == NULL
2510 && !ppc_elf_create_got (abfd, info))
2511 return FALSE;
2512
2513 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2514 return FALSE;
2515
2516 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2517 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2518
2519 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2520 htab->glink = s;
2521 if (s == NULL
2522 || !bfd_set_section_alignment (abfd, s, 4))
2523 return FALSE;
2524
2525 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2526 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2527 SEC_ALLOC | SEC_LINKER_CREATED);
2528 htab->dynsbss = s;
2529 if (s == NULL)
2530 return FALSE;
2531
2532 if (! info->shared)
2533 {
2534 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2535 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2536 htab->relsbss = s;
2537 if (s == NULL
2538 || ! bfd_set_section_alignment (abfd, s, 2))
2539 return FALSE;
2540 }
2541
2542 /* Create the section for VxWorks static plt relocations. */
2543 if (htab->is_vxworks && !info->shared)
2544 {
2545 s = bfd_make_section (abfd, ".rela.plt.unloaded");
2546 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
2547 | SEC_LINKER_CREATED);
2548 if (s == NULL
2549 || ! bfd_set_section_flags (abfd, s, flags)
2550 || ! bfd_set_section_alignment (abfd, s,
2551 get_elf_backend_data (abfd)->s->log_file_align))
2552 return FALSE;
2553 htab->srelplt2 = s;
2554 }
2555
2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2558 if (s == NULL)
2559 abort ();
2560
2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2562 return bfd_set_section_flags (abfd, s, flags);
2563 }
2564
2565 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2566
2567 static void
2568 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2569 struct elf_link_hash_entry *dir,
2570 struct elf_link_hash_entry *ind)
2571 {
2572 struct ppc_elf_link_hash_entry *edir, *eind;
2573
2574 edir = (struct ppc_elf_link_hash_entry *) dir;
2575 eind = (struct ppc_elf_link_hash_entry *) ind;
2576
2577 if (eind->dyn_relocs != NULL)
2578 {
2579 if (edir->dyn_relocs != NULL)
2580 {
2581 struct ppc_elf_dyn_relocs **pp;
2582 struct ppc_elf_dyn_relocs *p;
2583
2584 /* Add reloc counts against the indirect sym to the direct sym
2585 list. Merge any entries against the same section. */
2586 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2587 {
2588 struct ppc_elf_dyn_relocs *q;
2589
2590 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2591 if (q->sec == p->sec)
2592 {
2593 q->pc_count += p->pc_count;
2594 q->count += p->count;
2595 *pp = p->next;
2596 break;
2597 }
2598 if (q == NULL)
2599 pp = &p->next;
2600 }
2601 *pp = edir->dyn_relocs;
2602 }
2603
2604 edir->dyn_relocs = eind->dyn_relocs;
2605 eind->dyn_relocs = NULL;
2606 }
2607
2608 edir->tls_mask |= eind->tls_mask;
2609 edir->has_sda_refs |= eind->has_sda_refs;
2610
2611 /* If called to transfer flags for a weakdef during processing
2612 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2613 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2614 if (!(ELIMINATE_COPY_RELOCS
2615 && eind->elf.root.type != bfd_link_hash_indirect
2616 && edir->elf.dynamic_adjusted))
2617 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2618
2619 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2620 edir->elf.ref_regular |= eind->elf.ref_regular;
2621 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2622 edir->elf.needs_plt |= eind->elf.needs_plt;
2623
2624 /* If we were called to copy over info for a weak sym, that's all. */
2625 if (eind->elf.root.type != bfd_link_hash_indirect)
2626 return;
2627
2628 /* Copy over the GOT refcount entries that we may have already seen to
2629 the symbol which just became indirect. */
2630 edir->elf.got.refcount += eind->elf.got.refcount;
2631 eind->elf.got.refcount = 0;
2632
2633 /* And plt entries. */
2634 if (eind->elf.plt.plist != NULL)
2635 {
2636 if (edir->elf.plt.plist != NULL)
2637 {
2638 struct plt_entry **entp;
2639 struct plt_entry *ent;
2640
2641 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2642 {
2643 struct plt_entry *dent;
2644
2645 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2646 if (dent->sec == ent->sec && dent->addend == ent->addend)
2647 {
2648 dent->plt.refcount += ent->plt.refcount;
2649 *entp = ent->next;
2650 break;
2651 }
2652 if (dent == NULL)
2653 entp = &ent->next;
2654 }
2655 *entp = edir->elf.plt.plist;
2656 }
2657
2658 edir->elf.plt.plist = eind->elf.plt.plist;
2659 eind->elf.plt.plist = NULL;
2660 }
2661
2662 if (eind->elf.dynindx != -1)
2663 {
2664 if (edir->elf.dynindx != -1)
2665 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2666 edir->elf.dynstr_index);
2667 edir->elf.dynindx = eind->elf.dynindx;
2668 edir->elf.dynstr_index = eind->elf.dynstr_index;
2669 eind->elf.dynindx = -1;
2670 eind->elf.dynstr_index = 0;
2671 }
2672 }
2673
2674 /* Return 1 if target is one of ours. */
2675
2676 static bfd_boolean
2677 is_ppc_elf_target (const struct bfd_target *targ)
2678 {
2679 extern const bfd_target bfd_elf32_powerpc_vec;
2680 extern const bfd_target bfd_elf32_powerpcle_vec;
2681
2682 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2683 }
2684
2685 /* Hook called by the linker routine which adds symbols from an object
2686 file. We use it to put .comm items in .sbss, and not .bss. */
2687
2688 static bfd_boolean
2689 ppc_elf_add_symbol_hook (bfd *abfd,
2690 struct bfd_link_info *info,
2691 Elf_Internal_Sym *sym,
2692 const char **namep ATTRIBUTE_UNUSED,
2693 flagword *flagsp ATTRIBUTE_UNUSED,
2694 asection **secp,
2695 bfd_vma *valp)
2696 {
2697 if (sym->st_shndx == SHN_COMMON
2698 && !info->relocatable
2699 && sym->st_size <= elf_gp_size (abfd)
2700 && is_ppc_elf_target (info->hash->creator))
2701 {
2702 /* Common symbols less than or equal to -G nn bytes are automatically
2703 put into .sbss. */
2704 struct ppc_elf_link_hash_table *htab;
2705
2706 htab = ppc_elf_hash_table (info);
2707 if (htab->sbss == NULL)
2708 {
2709 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2710
2711 if (!htab->elf.dynobj)
2712 htab->elf.dynobj = abfd;
2713
2714 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2715 ".sbss",
2716 flags);
2717 if (htab->sbss == NULL)
2718 return FALSE;
2719 }
2720
2721 *secp = htab->sbss;
2722 *valp = sym->st_size;
2723 }
2724
2725 return TRUE;
2726 }
2727 \f
2728 static bfd_boolean
2729 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2730 elf_linker_section_t *lsect)
2731 {
2732 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2733 TRUE, FALSE, TRUE);
2734 if (lsect->sym == NULL)
2735 return FALSE;
2736 if (lsect->sym->root.type == bfd_link_hash_new)
2737 lsect->sym->non_elf = 0;
2738 lsect->sym->ref_regular = 1;
2739 return TRUE;
2740 }
2741
2742 /* Create a special linker section. */
2743
2744 static bfd_boolean
2745 ppc_elf_create_linker_section (bfd *abfd,
2746 struct bfd_link_info *info,
2747 flagword flags,
2748 elf_linker_section_t *lsect)
2749 {
2750 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2751 asection *s;
2752
2753 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2754 | SEC_LINKER_CREATED);
2755
2756 /* Record the first bfd that needs the special sections. */
2757 if (!htab->elf.dynobj)
2758 htab->elf.dynobj = abfd;
2759
2760 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2761 lsect->name,
2762 flags);
2763 if (s == NULL
2764 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2765 return FALSE;
2766 lsect->section = s;
2767
2768 return create_sdata_sym (htab, lsect);
2769 }
2770
2771 /* Find a linker generated pointer with a given addend and type. */
2772
2773 static elf_linker_section_pointers_t *
2774 elf_find_pointer_linker_section
2775 (elf_linker_section_pointers_t *linker_pointers,
2776 bfd_vma addend,
2777 elf_linker_section_t *lsect)
2778 {
2779 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2780 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2781 return linker_pointers;
2782
2783 return NULL;
2784 }
2785
2786 /* Allocate a pointer to live in a linker created section. */
2787
2788 static bfd_boolean
2789 elf_create_pointer_linker_section (bfd *abfd,
2790 elf_linker_section_t *lsect,
2791 struct elf_link_hash_entry *h,
2792 const Elf_Internal_Rela *rel)
2793 {
2794 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2795 elf_linker_section_pointers_t *linker_section_ptr;
2796 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2797 bfd_size_type amt;
2798
2799 BFD_ASSERT (lsect != NULL);
2800
2801 /* Is this a global symbol? */
2802 if (h != NULL)
2803 {
2804 struct ppc_elf_link_hash_entry *eh;
2805
2806 /* Has this symbol already been allocated? If so, our work is done. */
2807 eh = (struct ppc_elf_link_hash_entry *) h;
2808 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2809 rel->r_addend,
2810 lsect))
2811 return TRUE;
2812
2813 ptr_linker_section_ptr = &eh->linker_section_pointer;
2814 }
2815 else
2816 {
2817 /* Allocation of a pointer to a local symbol. */
2818 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2819
2820 /* Allocate a table to hold the local symbols if first time. */
2821 if (!ptr)
2822 {
2823 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2824
2825 amt = num_symbols;
2826 amt *= sizeof (elf_linker_section_pointers_t *);
2827 ptr = bfd_zalloc (abfd, amt);
2828
2829 if (!ptr)
2830 return FALSE;
2831
2832 elf_local_ptr_offsets (abfd) = ptr;
2833 }
2834
2835 /* Has this symbol already been allocated? If so, our work is done. */
2836 if (elf_find_pointer_linker_section (ptr[r_symndx],
2837 rel->r_addend,
2838 lsect))
2839 return TRUE;
2840
2841 ptr_linker_section_ptr = &ptr[r_symndx];
2842 }
2843
2844 /* Allocate space for a pointer in the linker section, and allocate
2845 a new pointer record from internal memory. */
2846 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2847 amt = sizeof (elf_linker_section_pointers_t);
2848 linker_section_ptr = bfd_alloc (abfd, amt);
2849
2850 if (!linker_section_ptr)
2851 return FALSE;
2852
2853 linker_section_ptr->next = *ptr_linker_section_ptr;
2854 linker_section_ptr->addend = rel->r_addend;
2855 linker_section_ptr->lsect = lsect;
2856 *ptr_linker_section_ptr = linker_section_ptr;
2857
2858 linker_section_ptr->offset = lsect->section->size;
2859 lsect->section->size += 4;
2860
2861 #ifdef DEBUG
2862 fprintf (stderr,
2863 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2864 lsect->name, (long) linker_section_ptr->offset,
2865 (long) lsect->section->size);
2866 #endif
2867
2868 return TRUE;
2869 }
2870
2871 static bfd_boolean
2872 update_local_sym_info (bfd *abfd,
2873 Elf_Internal_Shdr *symtab_hdr,
2874 unsigned long r_symndx,
2875 int tls_type)
2876 {
2877 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2878 char *local_got_tls_masks;
2879
2880 if (local_got_refcounts == NULL)
2881 {
2882 bfd_size_type size = symtab_hdr->sh_info;
2883
2884 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2885 local_got_refcounts = bfd_zalloc (abfd, size);
2886 if (local_got_refcounts == NULL)
2887 return FALSE;
2888 elf_local_got_refcounts (abfd) = local_got_refcounts;
2889 }
2890
2891 local_got_refcounts[r_symndx] += 1;
2892 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2893 local_got_tls_masks[r_symndx] |= tls_type;
2894 return TRUE;
2895 }
2896
2897 static bfd_boolean
2898 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2899 asection *sec, bfd_vma addend)
2900 {
2901 struct plt_entry *ent;
2902
2903 if (addend < 32768)
2904 sec = NULL;
2905 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2906 if (ent->sec == sec && ent->addend == addend)
2907 break;
2908 if (ent == NULL)
2909 {
2910 bfd_size_type amt = sizeof (*ent);
2911 ent = bfd_alloc (abfd, amt);
2912 if (ent == NULL)
2913 return FALSE;
2914 ent->next = h->plt.plist;
2915 ent->sec = sec;
2916 ent->addend = addend;
2917 ent->plt.refcount = 0;
2918 h->plt.plist = ent;
2919 }
2920 ent->plt.refcount += 1;
2921 return TRUE;
2922 }
2923
2924 static struct plt_entry *
2925 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2926 {
2927 struct plt_entry *ent;
2928
2929 if (addend < 32768)
2930 sec = NULL;
2931 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2932 if (ent->sec == sec && ent->addend == addend)
2933 break;
2934 return ent;
2935 }
2936
2937 static void
2938 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2939 {
2940 (*_bfd_error_handler)
2941 (_("%B: relocation %s cannot be used when making a shared object"),
2942 abfd,
2943 ppc_elf_howto_table[r_type]->name);
2944 bfd_set_error (bfd_error_bad_value);
2945 }
2946
2947 /* Look through the relocs for a section during the first phase, and
2948 allocate space in the global offset table or procedure linkage
2949 table. */
2950
2951 static bfd_boolean
2952 ppc_elf_check_relocs (bfd *abfd,
2953 struct bfd_link_info *info,
2954 asection *sec,
2955 const Elf_Internal_Rela *relocs)
2956 {
2957 struct ppc_elf_link_hash_table *htab;
2958 Elf_Internal_Shdr *symtab_hdr;
2959 struct elf_link_hash_entry **sym_hashes;
2960 const Elf_Internal_Rela *rel;
2961 const Elf_Internal_Rela *rel_end;
2962 asection *got2, *sreloc;
2963
2964 if (info->relocatable)
2965 return TRUE;
2966
2967 /* Don't do anything special with non-loaded, non-alloced sections.
2968 In particular, any relocs in such sections should not affect GOT
2969 and PLT reference counting (ie. we don't allow them to create GOT
2970 or PLT entries), there's no possibility or desire to optimize TLS
2971 relocs, and there's not much point in propagating relocs to shared
2972 libs that the dynamic linker won't relocate. */
2973 if ((sec->flags & SEC_ALLOC) == 0)
2974 return TRUE;
2975
2976 #ifdef DEBUG
2977 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2978 sec, abfd);
2979 #endif
2980
2981 /* Initialize howto table if not already done. */
2982 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2983 ppc_elf_howto_init ();
2984
2985 htab = ppc_elf_hash_table (info);
2986 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2987 sym_hashes = elf_sym_hashes (abfd);
2988 got2 = bfd_get_section_by_name (abfd, ".got2");
2989 sreloc = NULL;
2990
2991 rel_end = relocs + sec->reloc_count;
2992 for (rel = relocs; rel < rel_end; rel++)
2993 {
2994 unsigned long r_symndx;
2995 enum elf_ppc_reloc_type r_type;
2996 struct elf_link_hash_entry *h;
2997 int tls_type = 0;
2998
2999 r_symndx = ELF32_R_SYM (rel->r_info);
3000 if (r_symndx < symtab_hdr->sh_info)
3001 h = NULL;
3002 else
3003 {
3004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3005 while (h->root.type == bfd_link_hash_indirect
3006 || h->root.type == bfd_link_hash_warning)
3007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3008 }
3009
3010 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3011 This shows up in particular in an R_PPC_ADDR32 in the eabi
3012 startup code. */
3013 if (h != NULL
3014 && htab->got == NULL
3015 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3016 {
3017 if (htab->elf.dynobj == NULL)
3018 htab->elf.dynobj = abfd;
3019 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3020 return FALSE;
3021 BFD_ASSERT (h == htab->elf.hgot);
3022 }
3023
3024 r_type = ELF32_R_TYPE (rel->r_info);
3025 switch (r_type)
3026 {
3027 case R_PPC_GOT_TLSLD16:
3028 case R_PPC_GOT_TLSLD16_LO:
3029 case R_PPC_GOT_TLSLD16_HI:
3030 case R_PPC_GOT_TLSLD16_HA:
3031 htab->tlsld_got.refcount += 1;
3032 tls_type = TLS_TLS | TLS_LD;
3033 goto dogottls;
3034
3035 case R_PPC_GOT_TLSGD16:
3036 case R_PPC_GOT_TLSGD16_LO:
3037 case R_PPC_GOT_TLSGD16_HI:
3038 case R_PPC_GOT_TLSGD16_HA:
3039 tls_type = TLS_TLS | TLS_GD;
3040 goto dogottls;
3041
3042 case R_PPC_GOT_TPREL16:
3043 case R_PPC_GOT_TPREL16_LO:
3044 case R_PPC_GOT_TPREL16_HI:
3045 case R_PPC_GOT_TPREL16_HA:
3046 if (info->shared)
3047 info->flags |= DF_STATIC_TLS;
3048 tls_type = TLS_TLS | TLS_TPREL;
3049 goto dogottls;
3050
3051 case R_PPC_GOT_DTPREL16:
3052 case R_PPC_GOT_DTPREL16_LO:
3053 case R_PPC_GOT_DTPREL16_HI:
3054 case R_PPC_GOT_DTPREL16_HA:
3055 tls_type = TLS_TLS | TLS_DTPREL;
3056 dogottls:
3057 sec->has_tls_reloc = 1;
3058 /* Fall thru */
3059
3060 /* GOT16 relocations */
3061 case R_PPC_GOT16:
3062 case R_PPC_GOT16_LO:
3063 case R_PPC_GOT16_HI:
3064 case R_PPC_GOT16_HA:
3065 /* This symbol requires a global offset table entry. */
3066 if (htab->got == NULL)
3067 {
3068 if (htab->elf.dynobj == NULL)
3069 htab->elf.dynobj = abfd;
3070 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3071 return FALSE;
3072 }
3073 if (h != NULL)
3074 {
3075 h->got.refcount += 1;
3076 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3077 }
3078 else
3079 /* This is a global offset table entry for a local symbol. */
3080 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3081 return FALSE;
3082 break;
3083
3084 /* Indirect .sdata relocation. */
3085 case R_PPC_EMB_SDAI16:
3086 if (info->shared)
3087 {
3088 bad_shared_reloc (abfd, r_type);
3089 return FALSE;
3090 }
3091 if (htab->sdata[0].section == NULL
3092 && !ppc_elf_create_linker_section (abfd, info, 0,
3093 &htab->sdata[0]))
3094 return FALSE;
3095 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3096 h, rel))
3097 return FALSE;
3098 if (h != NULL)
3099 {
3100 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3101 h->non_got_ref = TRUE;
3102 }
3103 break;
3104
3105 /* Indirect .sdata2 relocation. */
3106 case R_PPC_EMB_SDA2I16:
3107 if (info->shared)
3108 {
3109 bad_shared_reloc (abfd, r_type);
3110 return FALSE;
3111 }
3112 if (htab->sdata[1].section == NULL
3113 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3114 &htab->sdata[1]))
3115 return FALSE;
3116 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3117 h, rel))
3118 return FALSE;
3119 if (h != NULL)
3120 {
3121 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3122 h->non_got_ref = TRUE;
3123 }
3124 break;
3125
3126 case R_PPC_SDAREL16:
3127 if (info->shared)
3128 {
3129 bad_shared_reloc (abfd, r_type);
3130 return FALSE;
3131 }
3132 if (htab->sdata[0].sym == NULL
3133 && !create_sdata_sym (htab, &htab->sdata[0]))
3134 return FALSE;
3135 if (h != NULL)
3136 {
3137 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3138 h->non_got_ref = TRUE;
3139 }
3140 break;
3141
3142 case R_PPC_EMB_SDA2REL:
3143 if (info->shared)
3144 {
3145 bad_shared_reloc (abfd, r_type);
3146 return FALSE;
3147 }
3148 if (htab->sdata[1].sym == NULL
3149 && !create_sdata_sym (htab, &htab->sdata[1]))
3150 return FALSE;
3151 if (h != NULL)
3152 {
3153 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3154 h->non_got_ref = TRUE;
3155 }
3156 break;
3157
3158 case R_PPC_EMB_SDA21:
3159 case R_PPC_EMB_RELSDA:
3160 if (info->shared)
3161 {
3162 bad_shared_reloc (abfd, r_type);
3163 return FALSE;
3164 }
3165 if (htab->sdata[0].sym == NULL
3166 && !create_sdata_sym (htab, &htab->sdata[0]))
3167 return FALSE;
3168 if (htab->sdata[1].sym == NULL
3169 && !create_sdata_sym (htab, &htab->sdata[1]))
3170 return FALSE;
3171 if (h != NULL)
3172 {
3173 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3174 h->non_got_ref = TRUE;
3175 }
3176 break;
3177
3178 case R_PPC_EMB_NADDR32:
3179 case R_PPC_EMB_NADDR16:
3180 case R_PPC_EMB_NADDR16_LO:
3181 case R_PPC_EMB_NADDR16_HI:
3182 case R_PPC_EMB_NADDR16_HA:
3183 if (info->shared)
3184 {
3185 bad_shared_reloc (abfd, r_type);
3186 return FALSE;
3187 }
3188 if (h != NULL)
3189 h->non_got_ref = TRUE;
3190 break;
3191
3192 case R_PPC_PLT32:
3193 case R_PPC_PLTREL24:
3194 case R_PPC_PLTREL32:
3195 case R_PPC_PLT16_LO:
3196 case R_PPC_PLT16_HI:
3197 case R_PPC_PLT16_HA:
3198 #ifdef DEBUG
3199 fprintf (stderr, "Reloc requires a PLT entry\n");
3200 #endif
3201 /* This symbol requires a procedure linkage table entry. We
3202 actually build the entry in finish_dynamic_symbol,
3203 because this might be a case of linking PIC code without
3204 linking in any dynamic objects, in which case we don't
3205 need to generate a procedure linkage table after all. */
3206
3207 if (h == NULL)
3208 {
3209 /* It does not make sense to have a procedure linkage
3210 table entry for a local symbol. */
3211 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3212 "local symbol"),
3213 abfd,
3214 sec,
3215 (long) rel->r_offset,
3216 ppc_elf_howto_table[r_type]->name);
3217 bfd_set_error (bfd_error_bad_value);
3218 return FALSE;
3219 }
3220 else
3221 {
3222 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3223
3224 h->needs_plt = 1;
3225 if (!update_plt_info (abfd, h, got2, addend))
3226 return FALSE;
3227 }
3228 break;
3229
3230 /* The following relocations don't need to propagate the
3231 relocation if linking a shared object since they are
3232 section relative. */
3233 case R_PPC_SECTOFF:
3234 case R_PPC_SECTOFF_LO:
3235 case R_PPC_SECTOFF_HI:
3236 case R_PPC_SECTOFF_HA:
3237 case R_PPC_DTPREL16:
3238 case R_PPC_DTPREL16_LO:
3239 case R_PPC_DTPREL16_HI:
3240 case R_PPC_DTPREL16_HA:
3241 case R_PPC_TOC16:
3242 break;
3243
3244 case R_PPC_REL16:
3245 case R_PPC_REL16_LO:
3246 case R_PPC_REL16_HI:
3247 case R_PPC_REL16_HA:
3248 htab->new_plt = 1;
3249 break;
3250
3251 /* These are just markers. */
3252 case R_PPC_TLS:
3253 case R_PPC_EMB_MRKREF:
3254 case R_PPC_NONE:
3255 case R_PPC_max:
3256 break;
3257
3258 /* These should only appear in dynamic objects. */
3259 case R_PPC_COPY:
3260 case R_PPC_GLOB_DAT:
3261 case R_PPC_JMP_SLOT:
3262 case R_PPC_RELATIVE:
3263 break;
3264
3265 /* These aren't handled yet. We'll report an error later. */
3266 case R_PPC_ADDR30:
3267 case R_PPC_EMB_RELSEC16:
3268 case R_PPC_EMB_RELST_LO:
3269 case R_PPC_EMB_RELST_HI:
3270 case R_PPC_EMB_RELST_HA:
3271 case R_PPC_EMB_BIT_FLD:
3272 break;
3273
3274 /* This refers only to functions defined in the shared library. */
3275 case R_PPC_LOCAL24PC:
3276 if (h && h == htab->elf.hgot)
3277 htab->old_plt = 1;
3278 break;
3279
3280 /* This relocation describes the C++ object vtable hierarchy.
3281 Reconstruct it for later use during GC. */
3282 case R_PPC_GNU_VTINHERIT:
3283 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3284 return FALSE;
3285 break;
3286
3287 /* This relocation describes which C++ vtable entries are actually
3288 used. Record for later use during GC. */
3289 case R_PPC_GNU_VTENTRY:
3290 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3291 return FALSE;
3292 break;
3293
3294 /* We shouldn't really be seeing these. */
3295 case R_PPC_TPREL32:
3296 if (info->shared)
3297 info->flags |= DF_STATIC_TLS;
3298 goto dodyn;
3299
3300 /* Nor these. */
3301 case R_PPC_DTPMOD32:
3302 case R_PPC_DTPREL32:
3303 goto dodyn;
3304
3305 case R_PPC_TPREL16:
3306 case R_PPC_TPREL16_LO:
3307 case R_PPC_TPREL16_HI:
3308 case R_PPC_TPREL16_HA:
3309 if (info->shared)
3310 info->flags |= DF_STATIC_TLS;
3311 goto dodyn;
3312
3313 case R_PPC_REL32:
3314 if (h == NULL
3315 && got2 != NULL
3316 && (sec->flags & SEC_CODE) != 0
3317 && (info->shared || info->pie)
3318 && !htab->old_plt)
3319 {
3320 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3321 the start of a function, which assembles to a REL32
3322 reference to .got2. If we detect one of these, then
3323 force the old PLT layout because the linker cannot
3324 reliably deduce the GOT pointer value needed for
3325 PLT call stubs. */
3326 asection *s;
3327
3328 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3329 r_symndx);
3330 if (s == got2)
3331 htab->old_plt = 1;
3332 }
3333 /* fall through */
3334
3335 case R_PPC_REL24:
3336 case R_PPC_REL14:
3337 case R_PPC_REL14_BRTAKEN:
3338 case R_PPC_REL14_BRNTAKEN:
3339 if (h == NULL)
3340 break;
3341 if (h == htab->elf.hgot)
3342 {
3343 htab->old_plt = 1;
3344 break;
3345 }
3346 /* fall through */
3347
3348 case R_PPC_ADDR32:
3349 case R_PPC_ADDR24:
3350 case R_PPC_ADDR16:
3351 case R_PPC_ADDR16_LO:
3352 case R_PPC_ADDR16_HI:
3353 case R_PPC_ADDR16_HA:
3354 case R_PPC_ADDR14:
3355 case R_PPC_ADDR14_BRTAKEN:
3356 case R_PPC_ADDR14_BRNTAKEN:
3357 case R_PPC_UADDR32:
3358 case R_PPC_UADDR16:
3359 if (h != NULL && !info->shared)
3360 {
3361 /* We may need a plt entry if the symbol turns out to be
3362 a function defined in a dynamic object. */
3363 if (!update_plt_info (abfd, h, NULL, 0))
3364 return FALSE;
3365
3366 /* We may need a copy reloc too. */
3367 h->non_got_ref = 1;
3368 }
3369
3370 dodyn:
3371 /* If we are creating a shared library, and this is a reloc
3372 against a global symbol, or a non PC relative reloc
3373 against a local symbol, then we need to copy the reloc
3374 into the shared library. However, if we are linking with
3375 -Bsymbolic, we do not need to copy a reloc against a
3376 global symbol which is defined in an object we are
3377 including in the link (i.e., DEF_REGULAR is set). At
3378 this point we have not seen all the input files, so it is
3379 possible that DEF_REGULAR is not set now but will be set
3380 later (it is never cleared). In case of a weak definition,
3381 DEF_REGULAR may be cleared later by a strong definition in
3382 a shared library. We account for that possibility below by
3383 storing information in the dyn_relocs field of the hash
3384 table entry. A similar situation occurs when creating
3385 shared libraries and symbol visibility changes render the
3386 symbol local.
3387
3388 If on the other hand, we are creating an executable, we
3389 may need to keep relocations for symbols satisfied by a
3390 dynamic library if we manage to avoid copy relocs for the
3391 symbol. */
3392 if ((info->shared
3393 && (MUST_BE_DYN_RELOC (r_type)
3394 || (h != NULL
3395 && (! info->symbolic
3396 || h->root.type == bfd_link_hash_defweak
3397 || !h->def_regular))))
3398 || (ELIMINATE_COPY_RELOCS
3399 && !info->shared
3400 && h != NULL
3401 && (h->root.type == bfd_link_hash_defweak
3402 || !h->def_regular)))
3403 {
3404 struct ppc_elf_dyn_relocs *p;
3405 struct ppc_elf_dyn_relocs **head;
3406
3407 #ifdef DEBUG
3408 fprintf (stderr,
3409 "ppc_elf_check_relocs needs to "
3410 "create relocation for %s\n",
3411 (h && h->root.root.string
3412 ? h->root.root.string : "<unknown>"));
3413 #endif
3414 if (sreloc == NULL)
3415 {
3416 const char *name;
3417
3418 name = (bfd_elf_string_from_elf_section
3419 (abfd,
3420 elf_elfheader (abfd)->e_shstrndx,
3421 elf_section_data (sec)->rel_hdr.sh_name));
3422 if (name == NULL)
3423 return FALSE;
3424
3425 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3426 && strcmp (bfd_get_section_name (abfd, sec),
3427 name + 5) == 0);
3428
3429 if (htab->elf.dynobj == NULL)
3430 htab->elf.dynobj = abfd;
3431 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3432 if (sreloc == NULL)
3433 {
3434 flagword flags;
3435
3436 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3437 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3438 | SEC_ALLOC | SEC_LOAD);
3439 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3440 name,
3441 flags);
3442 if (sreloc == NULL
3443 || ! bfd_set_section_alignment (htab->elf.dynobj,
3444 sreloc, 2))
3445 return FALSE;
3446 }
3447 elf_section_data (sec)->sreloc = sreloc;
3448 }
3449
3450 /* If this is a global symbol, we count the number of
3451 relocations we need for this symbol. */
3452 if (h != NULL)
3453 {
3454 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3455 }
3456 else
3457 {
3458 /* Track dynamic relocs needed for local syms too.
3459 We really need local syms available to do this
3460 easily. Oh well. */
3461
3462 asection *s;
3463 void *vpp;
3464
3465 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3466 sec, r_symndx);
3467 if (s == NULL)
3468 return FALSE;
3469
3470 vpp = &elf_section_data (s)->local_dynrel;
3471 head = (struct ppc_elf_dyn_relocs **) vpp;
3472 }
3473
3474 p = *head;
3475 if (p == NULL || p->sec != sec)
3476 {
3477 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3478 if (p == NULL)
3479 return FALSE;
3480 p->next = *head;
3481 *head = p;
3482 p->sec = sec;
3483 p->count = 0;
3484 p->pc_count = 0;
3485 }
3486
3487 p->count += 1;
3488 if (!MUST_BE_DYN_RELOC (r_type))
3489 p->pc_count += 1;
3490 }
3491
3492 break;
3493 }
3494 }
3495
3496 return TRUE;
3497 }
3498 \f
3499 /* Merge backend specific data from an object file to the output
3500 object file when linking. */
3501
3502 static bfd_boolean
3503 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3504 {
3505 flagword old_flags;
3506 flagword new_flags;
3507 bfd_boolean error;
3508
3509 if (!is_ppc_elf_target (ibfd->xvec)
3510 || !is_ppc_elf_target (obfd->xvec))
3511 return TRUE;
3512
3513 /* Check if we have the same endianess. */
3514 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3515 return FALSE;
3516
3517 new_flags = elf_elfheader (ibfd)->e_flags;
3518 old_flags = elf_elfheader (obfd)->e_flags;
3519 if (!elf_flags_init (obfd))
3520 {
3521 /* First call, no flags set. */
3522 elf_flags_init (obfd) = TRUE;
3523 elf_elfheader (obfd)->e_flags = new_flags;
3524 }
3525
3526 /* Compatible flags are ok. */
3527 else if (new_flags == old_flags)
3528 ;
3529
3530 /* Incompatible flags. */
3531 else
3532 {
3533 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3534 to be linked with either. */
3535 error = FALSE;
3536 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3537 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3538 {
3539 error = TRUE;
3540 (*_bfd_error_handler)
3541 (_("%B: compiled with -mrelocatable and linked with "
3542 "modules compiled normally"), ibfd);
3543 }
3544 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3545 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3546 {
3547 error = TRUE;
3548 (*_bfd_error_handler)
3549 (_("%B: compiled normally and linked with "
3550 "modules compiled with -mrelocatable"), ibfd);
3551 }
3552
3553 /* The output is -mrelocatable-lib iff both the input files are. */
3554 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3555 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3556
3557 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3558 but each input file is either -mrelocatable or -mrelocatable-lib. */
3559 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3560 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3561 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3562 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3563
3564 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3565 any module uses it. */
3566 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3567
3568 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3569 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3570
3571 /* Warn about any other mismatches. */
3572 if (new_flags != old_flags)
3573 {
3574 error = TRUE;
3575 (*_bfd_error_handler)
3576 (_("%B: uses different e_flags (0x%lx) fields "
3577 "than previous modules (0x%lx)"),
3578 ibfd, (long) new_flags, (long) old_flags);
3579 }
3580
3581 if (error)
3582 {
3583 bfd_set_error (bfd_error_bad_value);
3584 return FALSE;
3585 }
3586 }
3587
3588 return TRUE;
3589 }
3590 \f
3591 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3592 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3593 int
3594 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3595 struct bfd_link_info *info,
3596 int force_old_plt,
3597 int emit_stub_syms)
3598 {
3599 struct ppc_elf_link_hash_table *htab;
3600 flagword flags;
3601
3602 htab = ppc_elf_hash_table (info);
3603 if (force_old_plt || !htab->new_plt)
3604 htab->old_plt = 1;
3605
3606 htab->emit_stub_syms = emit_stub_syms;
3607
3608 if (htab->is_vxworks)
3609 {
3610 /* The VxWorks PLT is a loaded section with contents. */
3611 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
3612 | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3613
3614 if (htab->plt != NULL
3615 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3616 return -1;
3617 }
3618 else if (!htab->old_plt)
3619 {
3620 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3621 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3622
3623 /* The new PLT is a loaded section. */
3624 if (htab->plt != NULL
3625 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3626 return -1;
3627
3628 /* The new GOT is not executable. */
3629 if (htab->got != NULL
3630 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3631 return -1;
3632 }
3633 else
3634 {
3635 /* Stop an unused .glink section from affecting .text alignment. */
3636 if (htab->glink != NULL
3637 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3638 return -1;
3639 }
3640 return !htab->old_plt;
3641 }
3642 \f
3643 /* Return the section that should be marked against GC for a given
3644 relocation. */
3645
3646 static asection *
3647 ppc_elf_gc_mark_hook (asection *sec,
3648 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3649 Elf_Internal_Rela *rel,
3650 struct elf_link_hash_entry *h,
3651 Elf_Internal_Sym *sym)
3652 {
3653 if (h != NULL)
3654 {
3655 switch (ELF32_R_TYPE (rel->r_info))
3656 {
3657 case R_PPC_GNU_VTINHERIT:
3658 case R_PPC_GNU_VTENTRY:
3659 break;
3660
3661 default:
3662 switch (h->root.type)
3663 {
3664 case bfd_link_hash_defined:
3665 case bfd_link_hash_defweak:
3666 return h->root.u.def.section;
3667
3668 case bfd_link_hash_common:
3669 return h->root.u.c.p->section;
3670
3671 default:
3672 break;
3673 }
3674 }
3675 }
3676 else
3677 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3678
3679 return NULL;
3680 }
3681
3682 /* Update the got, plt and dynamic reloc reference counts for the
3683 section being removed. */
3684
3685 static bfd_boolean
3686 ppc_elf_gc_sweep_hook (bfd *abfd,
3687 struct bfd_link_info *info,
3688 asection *sec,
3689 const Elf_Internal_Rela *relocs)
3690 {
3691 struct ppc_elf_link_hash_table *htab;
3692 Elf_Internal_Shdr *symtab_hdr;
3693 struct elf_link_hash_entry **sym_hashes;
3694 bfd_signed_vma *local_got_refcounts;
3695 const Elf_Internal_Rela *rel, *relend;
3696 asection *got2;
3697
3698 if ((sec->flags & SEC_ALLOC) == 0)
3699 return TRUE;
3700
3701 elf_section_data (sec)->local_dynrel = NULL;
3702
3703 htab = ppc_elf_hash_table (info);
3704 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3705 sym_hashes = elf_sym_hashes (abfd);
3706 local_got_refcounts = elf_local_got_refcounts (abfd);
3707 got2 = bfd_get_section_by_name (abfd, ".got2");
3708
3709 relend = relocs + sec->reloc_count;
3710 for (rel = relocs; rel < relend; rel++)
3711 {
3712 unsigned long r_symndx;
3713 enum elf_ppc_reloc_type r_type;
3714 struct elf_link_hash_entry *h = NULL;
3715
3716 r_symndx = ELF32_R_SYM (rel->r_info);
3717 if (r_symndx >= symtab_hdr->sh_info)
3718 {
3719 struct ppc_elf_dyn_relocs **pp, *p;
3720 struct ppc_elf_link_hash_entry *eh;
3721
3722 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3723 while (h->root.type == bfd_link_hash_indirect
3724 || h->root.type == bfd_link_hash_warning)
3725 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3726 eh = (struct ppc_elf_link_hash_entry *) h;
3727
3728 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3729 if (p->sec == sec)
3730 {
3731 /* Everything must go for SEC. */
3732 *pp = p->next;
3733 break;
3734 }
3735 }
3736
3737 r_type = ELF32_R_TYPE (rel->r_info);
3738 switch (r_type)
3739 {
3740 case R_PPC_GOT_TLSLD16:
3741 case R_PPC_GOT_TLSLD16_LO:
3742 case R_PPC_GOT_TLSLD16_HI:
3743 case R_PPC_GOT_TLSLD16_HA:
3744 htab->tlsld_got.refcount -= 1;
3745 /* Fall thru */
3746
3747 case R_PPC_GOT_TLSGD16:
3748 case R_PPC_GOT_TLSGD16_LO:
3749 case R_PPC_GOT_TLSGD16_HI:
3750 case R_PPC_GOT_TLSGD16_HA:
3751 case R_PPC_GOT_TPREL16:
3752 case R_PPC_GOT_TPREL16_LO:
3753 case R_PPC_GOT_TPREL16_HI:
3754 case R_PPC_GOT_TPREL16_HA:
3755 case R_PPC_GOT_DTPREL16:
3756 case R_PPC_GOT_DTPREL16_LO:
3757 case R_PPC_GOT_DTPREL16_HI:
3758 case R_PPC_GOT_DTPREL16_HA:
3759 case R_PPC_GOT16:
3760 case R_PPC_GOT16_LO:
3761 case R_PPC_GOT16_HI:
3762 case R_PPC_GOT16_HA:
3763 if (h != NULL)
3764 {
3765 if (h->got.refcount > 0)
3766 h->got.refcount--;
3767 }
3768 else if (local_got_refcounts != NULL)
3769 {
3770 if (local_got_refcounts[r_symndx] > 0)
3771 local_got_refcounts[r_symndx]--;
3772 }
3773 break;
3774
3775 case R_PPC_REL24:
3776 case R_PPC_REL14:
3777 case R_PPC_REL14_BRTAKEN:
3778 case R_PPC_REL14_BRNTAKEN:
3779 case R_PPC_REL32:
3780 if (h == NULL || h == htab->elf.hgot)
3781 break;
3782 /* Fall thru */
3783
3784 case R_PPC_ADDR32:
3785 case R_PPC_ADDR24:
3786 case R_PPC_ADDR16:
3787 case R_PPC_ADDR16_LO:
3788 case R_PPC_ADDR16_HI:
3789 case R_PPC_ADDR16_HA:
3790 case R_PPC_ADDR14:
3791 case R_PPC_ADDR14_BRTAKEN:
3792 case R_PPC_ADDR14_BRNTAKEN:
3793 case R_PPC_UADDR32:
3794 case R_PPC_UADDR16:
3795 if (info->shared)
3796 break;
3797
3798 case R_PPC_PLT32:
3799 case R_PPC_PLTREL24:
3800 case R_PPC_PLTREL32:
3801 case R_PPC_PLT16_LO:
3802 case R_PPC_PLT16_HI:
3803 case R_PPC_PLT16_HA:
3804 if (h != NULL)
3805 {
3806 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3807 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3808 if (ent->plt.refcount > 0)
3809 ent->plt.refcount -= 1;
3810 }
3811 break;
3812
3813 default:
3814 break;
3815 }
3816 }
3817 return TRUE;
3818 }
3819 \f
3820 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3821
3822 asection *
3823 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3824 {
3825 struct ppc_elf_link_hash_table *htab;
3826
3827 htab = ppc_elf_hash_table (info);
3828 if (!htab->old_plt
3829 && htab->plt != NULL
3830 && htab->plt->output_section != NULL)
3831 {
3832 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3833 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3834 }
3835
3836 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3837 FALSE, FALSE, TRUE);
3838 return _bfd_elf_tls_setup (obfd, info);
3839 }
3840
3841 /* Run through all the TLS relocs looking for optimization
3842 opportunities. */
3843
3844 bfd_boolean
3845 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3846 struct bfd_link_info *info)
3847 {
3848 bfd *ibfd;
3849 asection *sec;
3850 struct ppc_elf_link_hash_table *htab;
3851
3852 if (info->relocatable || info->shared)
3853 return TRUE;
3854
3855 htab = ppc_elf_hash_table (info);
3856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3857 {
3858 Elf_Internal_Sym *locsyms = NULL;
3859 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3860
3861 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3862 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3863 {
3864 Elf_Internal_Rela *relstart, *rel, *relend;
3865 int expecting_tls_get_addr;
3866
3867 /* Read the relocations. */
3868 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3869 info->keep_memory);
3870 if (relstart == NULL)
3871 return FALSE;
3872
3873 expecting_tls_get_addr = 0;
3874 relend = relstart + sec->reloc_count;
3875 for (rel = relstart; rel < relend; rel++)
3876 {
3877 enum elf_ppc_reloc_type r_type;
3878 unsigned long r_symndx;
3879 struct elf_link_hash_entry *h = NULL;
3880 char *tls_mask;
3881 char tls_set, tls_clear;
3882 bfd_boolean is_local;
3883
3884 r_symndx = ELF32_R_SYM (rel->r_info);
3885 if (r_symndx >= symtab_hdr->sh_info)
3886 {
3887 struct elf_link_hash_entry **sym_hashes;
3888
3889 sym_hashes = elf_sym_hashes (ibfd);
3890 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3891 while (h->root.type == bfd_link_hash_indirect
3892 || h->root.type == bfd_link_hash_warning)
3893 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3894 }
3895
3896 is_local = FALSE;
3897 if (h == NULL
3898 || !h->def_dynamic)
3899 is_local = TRUE;
3900
3901 r_type = ELF32_R_TYPE (rel->r_info);
3902 switch (r_type)
3903 {
3904 case R_PPC_GOT_TLSLD16:
3905 case R_PPC_GOT_TLSLD16_LO:
3906 case R_PPC_GOT_TLSLD16_HI:
3907 case R_PPC_GOT_TLSLD16_HA:
3908 /* These relocs should never be against a symbol
3909 defined in a shared lib. Leave them alone if
3910 that turns out to be the case. */
3911 expecting_tls_get_addr = 0;
3912 htab->tlsld_got.refcount -= 1;
3913 if (!is_local)
3914 continue;
3915
3916 /* LD -> LE */
3917 tls_set = 0;
3918 tls_clear = TLS_LD;
3919 expecting_tls_get_addr = 1;
3920 break;
3921
3922 case R_PPC_GOT_TLSGD16:
3923 case R_PPC_GOT_TLSGD16_LO:
3924 case R_PPC_GOT_TLSGD16_HI:
3925 case R_PPC_GOT_TLSGD16_HA:
3926 if (is_local)
3927 /* GD -> LE */
3928 tls_set = 0;
3929 else
3930 /* GD -> IE */
3931 tls_set = TLS_TLS | TLS_TPRELGD;
3932 tls_clear = TLS_GD;
3933 expecting_tls_get_addr = 1;
3934 break;
3935
3936 case R_PPC_GOT_TPREL16:
3937 case R_PPC_GOT_TPREL16_LO:
3938 case R_PPC_GOT_TPREL16_HI:
3939 case R_PPC_GOT_TPREL16_HA:
3940 expecting_tls_get_addr = 0;
3941 if (is_local)
3942 {
3943 /* IE -> LE */
3944 tls_set = 0;
3945 tls_clear = TLS_TPREL;
3946 break;
3947 }
3948 else
3949 continue;
3950
3951 case R_PPC_REL14:
3952 case R_PPC_REL14_BRTAKEN:
3953 case R_PPC_REL14_BRNTAKEN:
3954 case R_PPC_REL24:
3955 if (expecting_tls_get_addr
3956 && h != NULL
3957 && h == htab->tls_get_addr)
3958 {
3959 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3960 if (ent != NULL && ent->plt.refcount > 0)
3961 ent->plt.refcount -= 1;
3962 }
3963 expecting_tls_get_addr = 0;
3964 continue;
3965
3966 default:
3967 expecting_tls_get_addr = 0;
3968 continue;
3969 }
3970
3971 if (h != NULL)
3972 {
3973 if (tls_set == 0)
3974 {
3975 /* We managed to get rid of a got entry. */
3976 if (h->got.refcount > 0)
3977 h->got.refcount -= 1;
3978 }
3979 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3980 }
3981 else
3982 {
3983 Elf_Internal_Sym *sym;
3984 bfd_signed_vma *lgot_refs;
3985 char *lgot_masks;
3986
3987 if (locsyms == NULL)
3988 {
3989 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3990 if (locsyms == NULL)
3991 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3992 symtab_hdr->sh_info,
3993 0, NULL, NULL, NULL);
3994 if (locsyms == NULL)
3995 {
3996 if (elf_section_data (sec)->relocs != relstart)
3997 free (relstart);
3998 return FALSE;
3999 }
4000 }
4001 sym = locsyms + r_symndx;
4002 lgot_refs = elf_local_got_refcounts (ibfd);
4003 if (lgot_refs == NULL)
4004 abort ();
4005 if (tls_set == 0)
4006 {
4007 /* We managed to get rid of a got entry. */
4008 if (lgot_refs[r_symndx] > 0)
4009 lgot_refs[r_symndx] -= 1;
4010 }
4011 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4012 tls_mask = &lgot_masks[r_symndx];
4013 }
4014
4015 *tls_mask |= tls_set;
4016 *tls_mask &= ~tls_clear;
4017 }
4018
4019 if (elf_section_data (sec)->relocs != relstart)
4020 free (relstart);
4021 }
4022
4023 if (locsyms != NULL
4024 && (symtab_hdr->contents != (unsigned char *) locsyms))
4025 {
4026 if (!info->keep_memory)
4027 free (locsyms);
4028 else
4029 symtab_hdr->contents = (unsigned char *) locsyms;
4030 }
4031 }
4032 return TRUE;
4033 }
4034 \f
4035 /* Adjust a symbol defined by a dynamic object and referenced by a
4036 regular object. The current definition is in some section of the
4037 dynamic object, but we're not including those sections. We have to
4038 change the definition to something the rest of the link can
4039 understand. */
4040
4041 static bfd_boolean
4042 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4043 struct elf_link_hash_entry *h)
4044 {
4045 struct ppc_elf_link_hash_table *htab;
4046 asection *s;
4047 unsigned int power_of_two;
4048
4049 #ifdef DEBUG
4050 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4051 h->root.root.string);
4052 #endif
4053
4054 /* Make sure we know what is going on here. */
4055 htab = ppc_elf_hash_table (info);
4056 BFD_ASSERT (htab->elf.dynobj != NULL
4057 && (h->needs_plt
4058 || h->u.weakdef != NULL
4059 || (h->def_dynamic
4060 && h->ref_regular
4061 && !h->def_regular)));
4062
4063 /* Deal with function syms. */
4064 if (h->type == STT_FUNC
4065 || h->needs_plt)
4066 {
4067 /* Clear procedure linkage table information for any symbol that
4068 won't need a .plt entry. */
4069 struct plt_entry *ent;
4070 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4071 if (ent->plt.refcount > 0)
4072 break;
4073 if (ent == NULL
4074 || SYMBOL_CALLS_LOCAL (info, h)
4075 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4076 && h->root.type == bfd_link_hash_undefweak))
4077 {
4078 /* A PLT entry is not required/allowed when:
4079
4080 1. We are not using ld.so; because then the PLT entry
4081 can't be set up, so we can't use one. In this case,
4082 ppc_elf_adjust_dynamic_symbol won't even be called.
4083
4084 2. GC has rendered the entry unused.
4085
4086 3. We know for certain that a call to this symbol
4087 will go to this object, or will remain undefined. */
4088 h->plt.plist = NULL;
4089 h->needs_plt = 0;
4090 }
4091 return TRUE;
4092 }
4093 else
4094 h->plt.plist = NULL;
4095
4096 /* If this is a weak symbol, and there is a real definition, the
4097 processor independent code will have arranged for us to see the
4098 real definition first, and we can just use the same value. */
4099 if (h->u.weakdef != NULL)
4100 {
4101 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4102 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4103 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4104 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4105 if (ELIMINATE_COPY_RELOCS)
4106 h->non_got_ref = h->u.weakdef->non_got_ref;
4107 return TRUE;
4108 }
4109
4110 /* This is a reference to a symbol defined by a dynamic object which
4111 is not a function. */
4112
4113 /* If we are creating a shared library, we must presume that the
4114 only references to the symbol are via the global offset table.
4115 For such cases we need not do anything here; the relocations will
4116 be handled correctly by relocate_section. */
4117 if (info->shared)
4118 return TRUE;
4119
4120 /* If there are no references to this symbol that do not use the
4121 GOT, we don't need to generate a copy reloc. */
4122 if (!h->non_got_ref)
4123 return TRUE;
4124
4125 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4126 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4127 do this if there are any small data relocations. */
4128 if (ELIMINATE_COPY_RELOCS
4129 && !ppc_elf_hash_entry (h)->has_sda_refs)
4130 {
4131 struct ppc_elf_dyn_relocs *p;
4132 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4133 {
4134 s = p->sec->output_section;
4135 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4136 break;
4137 }
4138
4139 if (p == NULL)
4140 {
4141 h->non_got_ref = 0;
4142 return TRUE;
4143 }
4144 }
4145
4146 if (h->size == 0)
4147 {
4148 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4149 h->root.root.string);
4150 return TRUE;
4151 }
4152
4153 /* We must allocate the symbol in our .dynbss section, which will
4154 become part of the .bss section of the executable. There will be
4155 an entry for this symbol in the .dynsym section. The dynamic
4156 object will contain position independent code, so all references
4157 from the dynamic object to this symbol will go through the global
4158 offset table. The dynamic linker will use the .dynsym entry to
4159 determine the address it must put in the global offset table, so
4160 both the dynamic object and the regular object will refer to the
4161 same memory location for the variable.
4162
4163 Of course, if the symbol is referenced using SDAREL relocs, we
4164 must instead allocate it in .sbss. */
4165
4166 if (ppc_elf_hash_entry (h)->has_sda_refs)
4167 s = htab->dynsbss;
4168 else
4169 s = htab->dynbss;
4170 BFD_ASSERT (s != NULL);
4171
4172 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4173 copy the initial value out of the dynamic object and into the
4174 runtime process image. We need to remember the offset into the
4175 .rela.bss section we are going to use. */
4176 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4177 {
4178 asection *srel;
4179
4180 if (ppc_elf_hash_entry (h)->has_sda_refs)
4181 srel = htab->relsbss;
4182 else
4183 srel = htab->relbss;
4184 BFD_ASSERT (srel != NULL);
4185 srel->size += sizeof (Elf32_External_Rela);
4186 h->needs_copy = 1;
4187 }
4188
4189 /* We need to figure out the alignment required for this symbol. I
4190 have no idea how ELF linkers handle this. */
4191 power_of_two = bfd_log2 (h->size);
4192 if (power_of_two > 4)
4193 power_of_two = 4;
4194
4195 /* Apply the required alignment. */
4196 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4197 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4198 {
4199 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4200 return FALSE;
4201 }
4202
4203 /* Define the symbol as being at this point in the section. */
4204 h->root.u.def.section = s;
4205 h->root.u.def.value = s->size;
4206
4207 /* Increment the section size to make room for the symbol. */
4208 s->size += h->size;
4209
4210 return TRUE;
4211 }
4212 \f
4213 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4214 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4215 specifying the addend on the plt relocation. For -fpic code, the sym
4216 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4217 xxxxxxxx.got2.plt_pic32.<callee>. */
4218
4219 static bfd_boolean
4220 add_stub_sym (struct plt_entry *ent,
4221 struct elf_link_hash_entry *h,
4222 struct bfd_link_info *info)
4223 {
4224 struct elf_link_hash_entry *sh;
4225 size_t len1, len2, len3;
4226 char *name;
4227 const char *stub;
4228 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4229
4230 if (info->shared || info->pie)
4231 stub = ".plt_pic32.";
4232 else
4233 stub = ".plt_call32.";
4234
4235 len1 = strlen (h->root.root.string);
4236 len2 = strlen (stub);
4237 len3 = 0;
4238 if (ent->sec)
4239 len3 = strlen (ent->sec->name);
4240 name = bfd_malloc (len1 + len2 + len3 + 9);
4241 if (name == NULL)
4242 return FALSE;
4243 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4244 if (ent->sec)
4245 memcpy (name + 8, ent->sec->name, len3);
4246 memcpy (name + 8 + len3, stub, len2);
4247 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4248 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4249 if (sh == NULL)
4250 return FALSE;
4251 if (sh->root.type == bfd_link_hash_new)
4252 {
4253 sh->root.type = bfd_link_hash_defined;
4254 sh->root.u.def.section = htab->glink;
4255 sh->root.u.def.value = ent->glink_offset;
4256 sh->ref_regular = 1;
4257 sh->def_regular = 1;
4258 sh->ref_regular_nonweak = 1;
4259 sh->forced_local = 1;
4260 sh->non_elf = 0;
4261 }
4262 return TRUE;
4263 }
4264
4265 /* Allocate NEED contiguous space in .got, and return the offset.
4266 Handles allocation of the got header when crossing 32k. */
4267
4268 static bfd_vma
4269 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4270 {
4271 bfd_vma where;
4272 unsigned int max_before_header = 32768;
4273
4274 if (htab->old_plt)
4275 max_before_header = 32764;
4276
4277 if (htab->is_vxworks)
4278 {
4279 where = htab->got->size;
4280 htab->got->size += need;
4281 }
4282 else if (need <= htab->got_gap)
4283 {
4284 where = max_before_header - htab->got_gap;
4285 htab->got_gap -= need;
4286 }
4287 else
4288 {
4289 if (htab->got->size + need > max_before_header
4290 && htab->got->size <= max_before_header)
4291 {
4292 htab->got_gap = max_before_header - htab->got->size;
4293 htab->got->size = max_before_header + htab->got_header_size;
4294 }
4295 where = htab->got->size;
4296 htab->got->size += need;
4297 }
4298 return where;
4299 }
4300
4301 /* Allocate space in associated reloc sections for dynamic relocs. */
4302
4303 static bfd_boolean
4304 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4305 {
4306 struct bfd_link_info *info = inf;
4307 struct ppc_elf_link_hash_entry *eh;
4308 struct ppc_elf_link_hash_table *htab;
4309 struct ppc_elf_dyn_relocs *p;
4310
4311 if (h->root.type == bfd_link_hash_indirect)
4312 return TRUE;
4313
4314 if (h->root.type == bfd_link_hash_warning)
4315 /* When warning symbols are created, they **replace** the "real"
4316 entry in the hash table, thus we never get to see the real
4317 symbol in a hash traversal. So look at it now. */
4318 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4319
4320 htab = ppc_elf_hash_table (info);
4321 if (htab->elf.dynamic_sections_created)
4322 {
4323 struct plt_entry *ent;
4324 bfd_boolean doneone = FALSE;
4325 bfd_vma plt_offset = 0, glink_offset = 0;
4326
4327 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4328 if (ent->plt.refcount > 0)
4329 {
4330 /* Make sure this symbol is output as a dynamic symbol. */
4331 if (h->dynindx == -1
4332 && !h->forced_local)
4333 {
4334 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4335 return FALSE;
4336 }
4337
4338 if (info->shared
4339 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4340 {
4341 asection *s = htab->plt;
4342
4343 if (!(htab->old_plt || htab->is_vxworks))
4344 {
4345 if (!doneone)
4346 {
4347 plt_offset = s->size;
4348 s->size += 4;
4349 }
4350 ent->plt.offset = plt_offset;
4351
4352 s = htab->glink;
4353 if (!doneone || info->shared || info->pie)
4354 {
4355 glink_offset = s->size;
4356 s->size += GLINK_ENTRY_SIZE;
4357 }
4358 if (!doneone
4359 && !info->shared
4360 && !h->def_regular)
4361 {
4362 h->root.u.def.section = s;
4363 h->root.u.def.value = glink_offset;
4364 }
4365 ent->glink_offset = glink_offset;
4366
4367 if (htab->emit_stub_syms
4368 && !add_stub_sym (ent, h, info))
4369 return FALSE;
4370 }
4371 else
4372 {
4373 if (!doneone)
4374 {
4375 /* If this is the first .plt entry, make room
4376 for the special first entry. */
4377 if (s->size == 0)
4378 s->size += htab->plt_initial_entry_size;
4379
4380 /* The PowerPC PLT is actually composed of two
4381 parts, the first part is 2 words (for a load
4382 and a jump), and then there is a remaining
4383 word available at the end. */
4384 plt_offset = (htab->plt_initial_entry_size
4385 + (htab->plt_slot_size
4386 * ((s->size
4387 - htab->plt_initial_entry_size)
4388 / htab->plt_entry_size)));
4389
4390 /* If this symbol is not defined in a regular
4391 file, and we are not generating a shared
4392 library, then set the symbol to this location
4393 in the .plt. This is required to make
4394 function pointers compare as equal between
4395 the normal executable and the shared library. */
4396 if (! info->shared
4397 && !h->def_regular)
4398 {
4399 h->root.u.def.section = s;
4400 h->root.u.def.value = plt_offset;
4401 }
4402
4403 /* Make room for this entry. */
4404 s->size += htab->plt_entry_size;
4405 /* After the 8192nd entry, room for two entries
4406 is allocated. */
4407 if (!htab->is_vxworks
4408 && (s->size - htab->plt_initial_entry_size)
4409 / htab->plt_entry_size
4410 > PLT_NUM_SINGLE_ENTRIES)
4411 s->size += htab->plt_entry_size;
4412 }
4413 ent->plt.offset = plt_offset;
4414 }
4415
4416 /* We also need to make an entry in the .rela.plt section. */
4417 if (!doneone)
4418 {
4419 htab->relplt->size += sizeof (Elf32_External_Rela);
4420
4421 if (htab->is_vxworks)
4422 {
4423 /* Allocate space for the unloaded relocations. */
4424 if (!info->shared)
4425 {
4426 if (ent->plt.offset
4427 == (bfd_vma) htab->plt_initial_entry_size)
4428 {
4429 htab->srelplt2->size
4430 += sizeof (Elf32_External_Rela)
4431 * VXWORKS_PLTRESOLVE_RELOCS;
4432 }
4433
4434 htab->srelplt2->size
4435 += sizeof (Elf32_External_Rela)
4436 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4437 }
4438
4439 /* Every PLT entry has an associated GOT entry in
4440 .got.plt. */
4441 htab->sgotplt->size += 4;
4442 }
4443 doneone = TRUE;
4444 }
4445 }
4446 else
4447 ent->plt.offset = (bfd_vma) -1;
4448
4449 if (!doneone)
4450 {
4451 h->plt.plist = NULL;
4452 h->needs_plt = 0;
4453 }
4454 }
4455 }
4456 else
4457 {
4458 h->plt.plist = NULL;
4459 h->needs_plt = 0;
4460 }
4461
4462 eh = (struct ppc_elf_link_hash_entry *) h;
4463 if (eh->elf.got.refcount > 0)
4464 {
4465 /* Make sure this symbol is output as a dynamic symbol. */
4466 if (eh->elf.dynindx == -1
4467 && !eh->elf.forced_local)
4468 {
4469 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4470 return FALSE;
4471 }
4472
4473 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4474 && !eh->elf.def_dynamic)
4475 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4476 eh->elf.got.offset = (bfd_vma) -1;
4477 else
4478 {
4479 bfd_boolean dyn;
4480 unsigned int need = 0;
4481 if ((eh->tls_mask & TLS_TLS) != 0)
4482 {
4483 if ((eh->tls_mask & TLS_LD) != 0)
4484 need += 8;
4485 if ((eh->tls_mask & TLS_GD) != 0)
4486 need += 8;
4487 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4488 need += 4;
4489 if ((eh->tls_mask & TLS_DTPREL) != 0)
4490 need += 4;
4491 }
4492 else
4493 need += 4;
4494 eh->elf.got.offset = allocate_got (htab, need);
4495 dyn = htab->elf.dynamic_sections_created;
4496 if ((info->shared
4497 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4498 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4499 || eh->elf.root.type != bfd_link_hash_undefweak))
4500 {
4501 /* All the entries we allocated need relocs.
4502 Except LD only needs one. */
4503 if ((eh->tls_mask & TLS_LD) != 0)
4504 need -= 4;
4505 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4506 }
4507 }
4508 }
4509 else
4510 eh->elf.got.offset = (bfd_vma) -1;
4511
4512 if (eh->dyn_relocs == NULL)
4513 return TRUE;
4514
4515 /* In the shared -Bsymbolic case, discard space allocated for
4516 dynamic pc-relative relocs against symbols which turn out to be
4517 defined in regular objects. For the normal shared case, discard
4518 space for relocs that have become local due to symbol visibility
4519 changes. */
4520
4521 if (info->shared)
4522 {
4523 /* Relocs that use pc_count are those that appear on a call insn,
4524 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4525 generated via assembly. We want calls to protected symbols to
4526 resolve directly to the function rather than going via the plt.
4527 If people want function pointer comparisons to work as expected
4528 then they should avoid writing weird assembly. */
4529 if (SYMBOL_CALLS_LOCAL (info, h))
4530 {
4531 struct ppc_elf_dyn_relocs **pp;
4532
4533 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4534 {
4535 p->count -= p->pc_count;
4536 p->pc_count = 0;
4537 if (p->count == 0)
4538 *pp = p->next;
4539 else
4540 pp = &p->next;
4541 }
4542 }
4543
4544 /* Also discard relocs on undefined weak syms with non-default
4545 visibility. */
4546 if (eh->dyn_relocs != NULL
4547 && h->root.type == bfd_link_hash_undefweak)
4548 {
4549 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4550 eh->dyn_relocs = NULL;
4551
4552 /* Make sure undefined weak symbols are output as a dynamic
4553 symbol in PIEs. */
4554 else if (h->dynindx == -1
4555 && !h->forced_local)
4556 {
4557 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4558 return FALSE;
4559 }
4560 }
4561 }
4562 else if (ELIMINATE_COPY_RELOCS)
4563 {
4564 /* For the non-shared case, discard space for relocs against
4565 symbols which turn out to need copy relocs or are not
4566 dynamic. */
4567
4568 if (!h->non_got_ref
4569 && h->def_dynamic
4570 && !h->def_regular)
4571 {
4572 /* Make sure this symbol is output as a dynamic symbol.
4573 Undefined weak syms won't yet be marked as dynamic. */
4574 if (h->dynindx == -1
4575 && !h->forced_local)
4576 {
4577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4578 return FALSE;
4579 }
4580
4581 /* If that succeeded, we know we'll be keeping all the
4582 relocs. */
4583 if (h->dynindx != -1)
4584 goto keep;
4585 }
4586
4587 eh->dyn_relocs = NULL;
4588
4589 keep: ;
4590 }
4591
4592 /* Finally, allocate space. */
4593 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4594 {
4595 asection *sreloc = elf_section_data (p->sec)->sreloc;
4596 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4597 }
4598
4599 return TRUE;
4600 }
4601
4602 /* Find any dynamic relocs that apply to read-only sections. */
4603
4604 static bfd_boolean
4605 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4606 {
4607 struct ppc_elf_dyn_relocs *p;
4608
4609 if (h->root.type == bfd_link_hash_indirect)
4610 return TRUE;
4611
4612 if (h->root.type == bfd_link_hash_warning)
4613 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4614
4615 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4616 {
4617 asection *s = p->sec->output_section;
4618
4619 if (s != NULL
4620 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4621 == (SEC_READONLY | SEC_ALLOC)))
4622 {
4623 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4624
4625 /* Not an error, just cut short the traversal. */
4626 return FALSE;
4627 }
4628 }
4629 return TRUE;
4630 }
4631
4632 /* Set the sizes of the dynamic sections. */
4633
4634 static bfd_boolean
4635 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4636 struct bfd_link_info *info)
4637 {
4638 struct ppc_elf_link_hash_table *htab;
4639 asection *s;
4640 bfd_boolean relocs;
4641 bfd *ibfd;
4642
4643 #ifdef DEBUG
4644 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4645 #endif
4646
4647 htab = ppc_elf_hash_table (info);
4648 BFD_ASSERT (htab->elf.dynobj != NULL);
4649
4650 if (elf_hash_table (info)->dynamic_sections_created)
4651 {
4652 /* Set the contents of the .interp section to the interpreter. */
4653 if (info->executable)
4654 {
4655 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4656 BFD_ASSERT (s != NULL);
4657 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4658 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4659 }
4660 }
4661
4662 if (htab->old_plt)
4663 htab->got_header_size = 16;
4664 else
4665 htab->got_header_size = 12;
4666
4667 /* Set up .got offsets for local syms, and space for local dynamic
4668 relocs. */
4669 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4670 {
4671 bfd_signed_vma *local_got;
4672 bfd_signed_vma *end_local_got;
4673 char *lgot_masks;
4674 bfd_size_type locsymcount;
4675 Elf_Internal_Shdr *symtab_hdr;
4676
4677 if (!is_ppc_elf_target (ibfd->xvec))
4678 continue;
4679
4680 for (s = ibfd->sections; s != NULL; s = s->next)
4681 {
4682 struct ppc_elf_dyn_relocs *p;
4683
4684 for (p = ((struct ppc_elf_dyn_relocs *)
4685 elf_section_data (s)->local_dynrel);
4686 p != NULL;
4687 p = p->next)
4688 {
4689 if (!bfd_is_abs_section (p->sec)
4690 && bfd_is_abs_section (p->sec->output_section))
4691 {
4692 /* Input section has been discarded, either because
4693 it is a copy of a linkonce section or due to
4694 linker script /DISCARD/, so we'll be discarding
4695 the relocs too. */
4696 }
4697 else if (p->count != 0)
4698 {
4699 elf_section_data (p->sec)->sreloc->size
4700 += p->count * sizeof (Elf32_External_Rela);
4701 if ((p->sec->output_section->flags
4702 & (SEC_READONLY | SEC_ALLOC))
4703 == (SEC_READONLY | SEC_ALLOC))
4704 info->flags |= DF_TEXTREL;
4705 }
4706 }
4707 }
4708
4709 local_got = elf_local_got_refcounts (ibfd);
4710 if (!local_got)
4711 continue;
4712
4713 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4714 locsymcount = symtab_hdr->sh_info;
4715 end_local_got = local_got + locsymcount;
4716 lgot_masks = (char *) end_local_got;
4717 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4718 if (*local_got > 0)
4719 {
4720 if (*lgot_masks == (TLS_TLS | TLS_LD))
4721 {
4722 /* If just an LD reloc, we'll just use
4723 htab->tlsld_got.offset. */
4724 htab->tlsld_got.refcount += 1;
4725 *local_got = (bfd_vma) -1;
4726 }
4727 else
4728 {
4729 unsigned int need = 0;
4730 if ((*lgot_masks & TLS_TLS) != 0)
4731 {
4732 if ((*lgot_masks & TLS_GD) != 0)
4733 need += 8;
4734 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4735 need += 4;
4736 if ((*lgot_masks & TLS_DTPREL) != 0)
4737 need += 4;
4738 }
4739 else
4740 need += 4;
4741 *local_got = allocate_got (htab, need);
4742 if (info->shared)
4743 htab->relgot->size += (need
4744 * (sizeof (Elf32_External_Rela) / 4));
4745 }
4746 }
4747 else
4748 *local_got = (bfd_vma) -1;
4749 }
4750
4751 if (htab->tlsld_got.refcount > 0)
4752 {
4753 htab->tlsld_got.offset = allocate_got (htab, 8);
4754 if (info->shared)
4755 htab->relgot->size += sizeof (Elf32_External_Rela);
4756 }
4757 else
4758 htab->tlsld_got.offset = (bfd_vma) -1;
4759
4760 if (htab->is_vxworks)
4761 {
4762 /* Mark the GOT and PLT symbols as having relocations; they might
4763 not, but we won't know for sure until we build the GOT in
4764 finish_dynamic_symbol. */
4765 if (htab->elf.hgot)
4766 htab->elf.hgot->indx = -2;
4767 if (htab->elf.hplt)
4768 {
4769 htab->elf.hplt->indx = -2;
4770 if (htab->plt->flags & SEC_CODE)
4771 htab->elf.hplt->type = STT_FUNC;
4772 }
4773 }
4774
4775 /* Allocate space for global sym dynamic relocs. */
4776 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4777
4778 if (htab->got != NULL && !htab->is_vxworks)
4779 {
4780 unsigned int g_o_t = 32768;
4781
4782 /* If we haven't allocated the header, do so now. When we get here,
4783 for old plt/got the got size will be 0 to 32764 (not allocated),
4784 or 32780 to 65536 (header allocated). For new plt/got, the
4785 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4786 if (htab->got->size <= 32768)
4787 {
4788 g_o_t = htab->got->size;
4789 if (htab->old_plt)
4790 g_o_t += 4;
4791 htab->got->size += htab->got_header_size;
4792 }
4793
4794 htab->elf.hgot->root.u.def.value = g_o_t;
4795 }
4796
4797 if (htab->glink != NULL && htab->glink->size != 0)
4798 {
4799 htab->glink_pltresolve = htab->glink->size;
4800 /* Space for the branch table. */
4801 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4802 /* Pad out to align the start of PLTresolve. */
4803 htab->glink->size += -htab->glink->size & 15;
4804 htab->glink->size += GLINK_PLTRESOLVE;
4805
4806 if (htab->emit_stub_syms)
4807 {
4808 struct elf_link_hash_entry *sh;
4809 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4810 TRUE, FALSE, FALSE);
4811 if (sh == NULL)
4812 return FALSE;
4813 if (sh->root.type == bfd_link_hash_new)
4814 {
4815 sh->root.type = bfd_link_hash_defined;
4816 sh->root.u.def.section = htab->glink;
4817 sh->root.u.def.value = htab->glink_pltresolve;
4818 sh->ref_regular = 1;
4819 sh->def_regular = 1;
4820 sh->ref_regular_nonweak = 1;
4821 sh->forced_local = 1;
4822 sh->non_elf = 0;
4823 }
4824 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4825 TRUE, FALSE, FALSE);
4826 if (sh == NULL)
4827 return FALSE;
4828 if (sh->root.type == bfd_link_hash_new)
4829 {
4830 sh->root.type = bfd_link_hash_defined;
4831 sh->root.u.def.section = htab->glink;
4832 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4833 sh->ref_regular = 1;
4834 sh->def_regular = 1;
4835 sh->ref_regular_nonweak = 1;
4836 sh->forced_local = 1;
4837 sh->non_elf = 0;
4838 }
4839 }
4840 }
4841
4842 /* We've now determined the sizes of the various dynamic sections.
4843 Allocate memory for them. */
4844 relocs = FALSE;
4845 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4846 {
4847 bfd_boolean strip_section = TRUE;
4848
4849 if ((s->flags & SEC_LINKER_CREATED) == 0)
4850 continue;
4851
4852 if (s == htab->plt
4853 || s == htab->glink
4854 || s == htab->got
4855 || s == htab->sgotplt
4856 || s == htab->sbss
4857 || s == htab->dynbss
4858 || s == htab->dynsbss)
4859 {
4860 /* We'd like to strip these sections if they aren't needed, but if
4861 we've exported dynamic symbols from them we must leave them.
4862 It's too late to tell BFD to get rid of the symbols. */
4863 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4864 strip_section = FALSE;
4865 /* Strip this section if we don't need it; see the
4866 comment below. */
4867 }
4868 else if (s == htab->sdata[0].section
4869 || s == htab->sdata[1].section)
4870 {
4871 /* Strip these too. */
4872 }
4873 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4874 {
4875 if (s->size != 0)
4876 {
4877 /* Remember whether there are any relocation sections. */
4878 relocs = TRUE;
4879
4880 /* We use the reloc_count field as a counter if we need
4881 to copy relocs into the output file. */
4882 s->reloc_count = 0;
4883 }
4884 }
4885 else
4886 {
4887 /* It's not one of our sections, so don't allocate space. */
4888 continue;
4889 }
4890
4891 if (s->size == 0 && strip_section)
4892 {
4893 /* If we don't need this section, strip it from the
4894 output file. This is mostly to handle .rela.bss and
4895 .rela.plt. We must create both sections in
4896 create_dynamic_sections, because they must be created
4897 before the linker maps input sections to output
4898 sections. The linker does that before
4899 adjust_dynamic_symbol is called, and it is that
4900 function which decides whether anything needs to go
4901 into these sections. */
4902 s->flags |= SEC_EXCLUDE;
4903 continue;
4904 }
4905
4906 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4907 continue;
4908
4909 /* Allocate memory for the section contents. */
4910 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4911 if (s->contents == NULL)
4912 return FALSE;
4913 }
4914
4915 if (htab->elf.dynamic_sections_created)
4916 {
4917 /* Add some entries to the .dynamic section. We fill in the
4918 values later, in ppc_elf_finish_dynamic_sections, but we
4919 must add the entries now so that we get the correct size for
4920 the .dynamic section. The DT_DEBUG entry is filled in by the
4921 dynamic linker and used by the debugger. */
4922 #define add_dynamic_entry(TAG, VAL) \
4923 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4924
4925 if (info->executable)
4926 {
4927 if (!add_dynamic_entry (DT_DEBUG, 0))
4928 return FALSE;
4929 }
4930
4931 if (htab->plt != NULL && htab->plt->size != 0)
4932 {
4933 if (!add_dynamic_entry (DT_PLTGOT, 0)
4934 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4935 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4936 || !add_dynamic_entry (DT_JMPREL, 0))
4937 return FALSE;
4938 }
4939
4940 if (htab->glink != NULL && htab->glink->size != 0)
4941 {
4942 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4943 return FALSE;
4944 }
4945
4946 if (relocs)
4947 {
4948 if (!add_dynamic_entry (DT_RELA, 0)
4949 || !add_dynamic_entry (DT_RELASZ, 0)
4950 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4951 return FALSE;
4952 }
4953
4954 /* If any dynamic relocs apply to a read-only section, then we
4955 need a DT_TEXTREL entry. */
4956 if ((info->flags & DF_TEXTREL) == 0)
4957 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4958 info);
4959
4960 if ((info->flags & DF_TEXTREL) != 0)
4961 {
4962 if (!add_dynamic_entry (DT_TEXTREL, 0))
4963 return FALSE;
4964 }
4965 }
4966 #undef add_dynamic_entry
4967
4968 return TRUE;
4969 }
4970 \f
4971 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4972
4973 static const int shared_stub_entry[] =
4974 {
4975 0x7c0802a6, /* mflr 0 */
4976 0x429f0005, /* bcl 20, 31, .Lxxx */
4977 0x7d6802a6, /* mflr 11 */
4978 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4979 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4980 0x7c0803a6, /* mtlr 0 */
4981 0x7d6903a6, /* mtctr 11 */
4982 0x4e800420, /* bctr */
4983 };
4984
4985 static const int stub_entry[] =
4986 {
4987 0x3d600000, /* lis 11,xxx@ha */
4988 0x396b0000, /* addi 11,11,xxx@l */
4989 0x7d6903a6, /* mtctr 11 */
4990 0x4e800420, /* bctr */
4991 };
4992
4993 static bfd_boolean
4994 ppc_elf_relax_section (bfd *abfd,
4995 asection *isec,
4996 struct bfd_link_info *link_info,
4997 bfd_boolean *again)
4998 {
4999 struct one_fixup
5000 {
5001 struct one_fixup *next;
5002 asection *tsec;
5003 bfd_vma toff;
5004 bfd_vma trampoff;
5005 };
5006
5007 Elf_Internal_Shdr *symtab_hdr;
5008 bfd_byte *contents = NULL;
5009 Elf_Internal_Sym *isymbuf = NULL;
5010 Elf_Internal_Rela *internal_relocs = NULL;
5011 Elf_Internal_Rela *irel, *irelend;
5012 struct one_fixup *fixups = NULL;
5013 bfd_boolean changed;
5014 struct ppc_elf_link_hash_table *htab;
5015 bfd_size_type trampoff;
5016 asection *got2;
5017
5018 *again = FALSE;
5019
5020 /* Nothing to do if there are no relocations, and no need to do
5021 anything with non-alloc sections. */
5022 if ((isec->flags & SEC_ALLOC) == 0
5023 || (isec->flags & SEC_RELOC) == 0
5024 || isec->reloc_count == 0)
5025 return TRUE;
5026
5027 trampoff = (isec->size + 3) & (bfd_vma) -4;
5028 /* Space for a branch around any trampolines. */
5029 trampoff += 4;
5030
5031 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5032
5033 /* Get a copy of the native relocations. */
5034 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5035 link_info->keep_memory);
5036 if (internal_relocs == NULL)
5037 goto error_return;
5038
5039 htab = ppc_elf_hash_table (link_info);
5040 got2 = bfd_get_section_by_name (abfd, ".got2");
5041
5042 irelend = internal_relocs + isec->reloc_count;
5043 for (irel = internal_relocs; irel < irelend; irel++)
5044 {
5045 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5046 bfd_vma symaddr, reladdr, toff, roff;
5047 asection *tsec;
5048 struct one_fixup *f;
5049 size_t insn_offset = 0;
5050 bfd_vma max_branch_offset, val;
5051 bfd_byte *hit_addr;
5052 unsigned long t0;
5053 unsigned char sym_type;
5054
5055 switch (r_type)
5056 {
5057 case R_PPC_REL24:
5058 case R_PPC_LOCAL24PC:
5059 case R_PPC_PLTREL24:
5060 max_branch_offset = 1 << 25;
5061 break;
5062
5063 case R_PPC_REL14:
5064 case R_PPC_REL14_BRTAKEN:
5065 case R_PPC_REL14_BRNTAKEN:
5066 max_branch_offset = 1 << 15;
5067 break;
5068
5069 default:
5070 continue;
5071 }
5072
5073 /* Get the value of the symbol referred to by the reloc. */
5074 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5075 {
5076 /* A local symbol. */
5077 Elf_Internal_Sym *isym;
5078
5079 /* Read this BFD's local symbols. */
5080 if (isymbuf == NULL)
5081 {
5082 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5083 if (isymbuf == NULL)
5084 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5085 symtab_hdr->sh_info, 0,
5086 NULL, NULL, NULL);
5087 if (isymbuf == 0)
5088 goto error_return;
5089 }
5090 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5091 if (isym->st_shndx == SHN_UNDEF)
5092 continue; /* We can't do anything with undefined symbols. */
5093 else if (isym->st_shndx == SHN_ABS)
5094 tsec = bfd_abs_section_ptr;
5095 else if (isym->st_shndx == SHN_COMMON)
5096 tsec = bfd_com_section_ptr;
5097 else
5098 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5099
5100 toff = isym->st_value;
5101 sym_type = ELF_ST_TYPE (isym->st_info);
5102 }
5103 else
5104 {
5105 /* Global symbol handling. */
5106 unsigned long indx;
5107 struct elf_link_hash_entry *h;
5108
5109 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5110 h = elf_sym_hashes (abfd)[indx];
5111
5112 while (h->root.type == bfd_link_hash_indirect
5113 || h->root.type == bfd_link_hash_warning)
5114 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5115
5116 tsec = NULL;
5117 toff = 0;
5118 if (r_type == R_PPC_PLTREL24
5119 && htab->plt != NULL)
5120 {
5121 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5122
5123 if (ent != NULL)
5124 {
5125 if (!htab->old_plt)
5126 {
5127 tsec = htab->glink;
5128 toff = ent->glink_offset;
5129 }
5130 else
5131 {
5132 tsec = htab->plt;
5133 toff = ent->plt.offset;
5134 }
5135 }
5136 }
5137 if (tsec != NULL)
5138 ;
5139 else if (h->root.type == bfd_link_hash_defined
5140 || h->root.type == bfd_link_hash_defweak)
5141 {
5142 tsec = h->root.u.def.section;
5143 toff = h->root.u.def.value;
5144 }
5145 else
5146 continue;
5147
5148 sym_type = h->type;
5149 }
5150
5151 /* If the branch and target are in the same section, you have
5152 no hope of adding stubs. We'll error out later should the
5153 branch overflow. */
5154 if (tsec == isec)
5155 continue;
5156
5157 /* There probably isn't any reason to handle symbols in
5158 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5159 attribute for a code section, and we are only looking at
5160 branches. However, implement it correctly here as a
5161 reference for other target relax_section functions. */
5162 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5163 {
5164 /* At this stage in linking, no SEC_MERGE symbol has been
5165 adjusted, so all references to such symbols need to be
5166 passed through _bfd_merged_section_offset. (Later, in
5167 relocate_section, all SEC_MERGE symbols *except* for
5168 section symbols have been adjusted.)
5169
5170 gas may reduce relocations against symbols in SEC_MERGE
5171 sections to a relocation against the section symbol when
5172 the original addend was zero. When the reloc is against
5173 a section symbol we should include the addend in the
5174 offset passed to _bfd_merged_section_offset, since the
5175 location of interest is the original symbol. On the
5176 other hand, an access to "sym+addend" where "sym" is not
5177 a section symbol should not include the addend; Such an
5178 access is presumed to be an offset from "sym"; The
5179 location of interest is just "sym". */
5180 if (sym_type == STT_SECTION)
5181 toff += irel->r_addend;
5182
5183 toff = _bfd_merged_section_offset (abfd, &tsec,
5184 elf_section_data (tsec)->sec_info,
5185 toff);
5186
5187 if (sym_type != STT_SECTION)
5188 toff += irel->r_addend;
5189 }
5190 /* PLTREL24 addends are special. */
5191 else if (r_type != R_PPC_PLTREL24)
5192 toff += irel->r_addend;
5193
5194 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5195
5196 roff = irel->r_offset;
5197 reladdr = isec->output_section->vma + isec->output_offset + roff;
5198
5199 /* If the branch is in range, no need to do anything. */
5200 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5201 continue;
5202
5203 /* Look for an existing fixup to this address. */
5204 for (f = fixups; f ; f = f->next)
5205 if (f->tsec == tsec && f->toff == toff)
5206 break;
5207
5208 if (f == NULL)
5209 {
5210 size_t size;
5211 unsigned long stub_rtype;
5212
5213 val = trampoff - roff;
5214 if (val >= max_branch_offset)
5215 /* Oh dear, we can't reach a trampoline. Don't try to add
5216 one. We'll report an error later. */
5217 continue;
5218
5219 if (link_info->shared)
5220 {
5221 size = 4 * ARRAY_SIZE (shared_stub_entry);
5222 insn_offset = 12;
5223 stub_rtype = R_PPC_RELAX32PC;
5224 }
5225 else
5226 {
5227 size = 4 * ARRAY_SIZE (stub_entry);
5228 insn_offset = 0;
5229 stub_rtype = R_PPC_RELAX32;
5230 }
5231
5232 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5233 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5234 abort ();
5235 if (tsec == htab->plt
5236 || tsec == htab->glink)
5237 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5238
5239 /* Hijack the old relocation. Since we need two
5240 relocations for this use a "composite" reloc. */
5241 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5242 stub_rtype);
5243 irel->r_offset = trampoff + insn_offset;
5244
5245 /* Record the fixup so we don't do it again this section. */
5246 f = bfd_malloc (sizeof (*f));
5247 f->next = fixups;
5248 f->tsec = tsec;
5249 f->toff = toff;
5250 f->trampoff = trampoff;
5251 fixups = f;
5252
5253 trampoff += size;
5254 }
5255 else
5256 {
5257 val = f->trampoff - roff;
5258 if (val >= max_branch_offset)
5259 continue;
5260
5261 /* Nop out the reloc, since we're finalizing things here. */
5262 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5263 }
5264
5265 /* Get the section contents. */
5266 if (contents == NULL)
5267 {
5268 /* Get cached copy if it exists. */
5269 if (elf_section_data (isec)->this_hdr.contents != NULL)
5270 contents = elf_section_data (isec)->this_hdr.contents;
5271 else
5272 {
5273 /* Go get them off disk. */
5274 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5275 goto error_return;
5276 }
5277 }
5278
5279 /* Fix up the existing branch to hit the trampoline. */
5280 hit_addr = contents + roff;
5281 switch (r_type)
5282 {
5283 case R_PPC_REL24:
5284 case R_PPC_LOCAL24PC:
5285 case R_PPC_PLTREL24:
5286 t0 = bfd_get_32 (abfd, hit_addr);
5287 t0 &= ~0x3fffffc;
5288 t0 |= val & 0x3fffffc;
5289 bfd_put_32 (abfd, t0, hit_addr);
5290 break;
5291
5292 case R_PPC_REL14:
5293 case R_PPC_REL14_BRTAKEN:
5294 case R_PPC_REL14_BRNTAKEN:
5295 t0 = bfd_get_32 (abfd, hit_addr);
5296 t0 &= ~0xfffc;
5297 t0 |= val & 0xfffc;
5298 bfd_put_32 (abfd, t0, hit_addr);
5299 break;
5300 }
5301 }
5302
5303 /* Write out the trampolines. */
5304 changed = fixups != NULL;
5305 if (fixups != NULL)
5306 {
5307 const int *stub;
5308 bfd_byte *dest;
5309 bfd_vma val;
5310 int i, size;
5311
5312 do
5313 {
5314 struct one_fixup *f = fixups;
5315 fixups = fixups->next;
5316 free (f);
5317 }
5318 while (fixups);
5319
5320 contents = bfd_realloc (contents, trampoff);
5321 if (contents == NULL)
5322 goto error_return;
5323
5324 isec->size = (isec->size + 3) & (bfd_vma) -4;
5325 /* Branch around the trampolines. */
5326 val = trampoff - isec->size + 0x48000000;
5327 dest = contents + isec->size;
5328 isec->size = trampoff;
5329 bfd_put_32 (abfd, val, dest);
5330 dest += 4;
5331
5332 if (link_info->shared)
5333 {
5334 stub = shared_stub_entry;
5335 size = ARRAY_SIZE (shared_stub_entry);
5336 }
5337 else
5338 {
5339 stub = stub_entry;
5340 size = ARRAY_SIZE (stub_entry);
5341 }
5342
5343 i = 0;
5344 while (dest < contents + trampoff)
5345 {
5346 bfd_put_32 (abfd, stub[i], dest);
5347 i++;
5348 if (i == size)
5349 i = 0;
5350 dest += 4;
5351 }
5352 BFD_ASSERT (i == 0);
5353 }
5354
5355 if (isymbuf != NULL
5356 && symtab_hdr->contents != (unsigned char *) isymbuf)
5357 {
5358 if (! link_info->keep_memory)
5359 free (isymbuf);
5360 else
5361 {
5362 /* Cache the symbols for elf_link_input_bfd. */
5363 symtab_hdr->contents = (unsigned char *) isymbuf;
5364 }
5365 }
5366
5367 if (contents != NULL
5368 && elf_section_data (isec)->this_hdr.contents != contents)
5369 {
5370 if (!changed && !link_info->keep_memory)
5371 free (contents);
5372 else
5373 {
5374 /* Cache the section contents for elf_link_input_bfd. */
5375 elf_section_data (isec)->this_hdr.contents = contents;
5376 }
5377 }
5378
5379 if (elf_section_data (isec)->relocs != internal_relocs)
5380 {
5381 if (!changed)
5382 free (internal_relocs);
5383 else
5384 elf_section_data (isec)->relocs = internal_relocs;
5385 }
5386
5387 *again = changed;
5388 return TRUE;
5389
5390 error_return:
5391 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5392 free (isymbuf);
5393 if (contents != NULL
5394 && elf_section_data (isec)->this_hdr.contents != contents)
5395 free (contents);
5396 if (internal_relocs != NULL
5397 && elf_section_data (isec)->relocs != internal_relocs)
5398 free (internal_relocs);
5399 return FALSE;
5400 }
5401 \f
5402 /* What to do when ld finds relocations against symbols defined in
5403 discarded sections. */
5404
5405 static unsigned int
5406 ppc_elf_action_discarded (asection *sec)
5407 {
5408 if (strcmp (".fixup", sec->name) == 0)
5409 return 0;
5410
5411 if (strcmp (".got2", sec->name) == 0)
5412 return 0;
5413
5414 return _bfd_elf_default_action_discarded (sec);
5415 }
5416 \f
5417 /* Fill in the address for a pointer generated in a linker section. */
5418
5419 static bfd_vma
5420 elf_finish_pointer_linker_section (bfd *input_bfd,
5421 elf_linker_section_t *lsect,
5422 struct elf_link_hash_entry *h,
5423 bfd_vma relocation,
5424 const Elf_Internal_Rela *rel)
5425 {
5426 elf_linker_section_pointers_t *linker_section_ptr;
5427
5428 BFD_ASSERT (lsect != NULL);
5429
5430 if (h != NULL)
5431 {
5432 /* Handle global symbol. */
5433 struct ppc_elf_link_hash_entry *eh;
5434
5435 eh = (struct ppc_elf_link_hash_entry *) h;
5436 BFD_ASSERT (eh->elf.def_regular);
5437 linker_section_ptr = eh->linker_section_pointer;
5438 }
5439 else
5440 {
5441 /* Handle local symbol. */
5442 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5443
5444 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5445 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5446 }
5447
5448 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5449 rel->r_addend,
5450 lsect);
5451 BFD_ASSERT (linker_section_ptr != NULL);
5452
5453 /* Offset will always be a multiple of four, so use the bottom bit
5454 as a "written" flag. */
5455 if ((linker_section_ptr->offset & 1) == 0)
5456 {
5457 bfd_put_32 (lsect->section->owner,
5458 relocation + linker_section_ptr->addend,
5459 lsect->section->contents + linker_section_ptr->offset);
5460 linker_section_ptr->offset += 1;
5461 }
5462
5463 relocation = (lsect->section->output_offset
5464 + linker_section_ptr->offset - 1
5465 - 0x8000);
5466
5467 #ifdef DEBUG
5468 fprintf (stderr,
5469 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5470 lsect->name, (long) relocation, (long) relocation);
5471 #endif
5472
5473 /* Subtract out the addend, because it will get added back in by the normal
5474 processing. */
5475 return relocation - linker_section_ptr->addend;
5476 }
5477
5478 /* The RELOCATE_SECTION function is called by the ELF backend linker
5479 to handle the relocations for a section.
5480
5481 The relocs are always passed as Rela structures; if the section
5482 actually uses Rel structures, the r_addend field will always be
5483 zero.
5484
5485 This function is responsible for adjust the section contents as
5486 necessary, and (if using Rela relocs and generating a
5487 relocatable output file) adjusting the reloc addend as
5488 necessary.
5489
5490 This function does not have to worry about setting the reloc
5491 address or the reloc symbol index.
5492
5493 LOCAL_SYMS is a pointer to the swapped in local symbols.
5494
5495 LOCAL_SECTIONS is an array giving the section in the input file
5496 corresponding to the st_shndx field of each local symbol.
5497
5498 The global hash table entry for the global symbols can be found
5499 via elf_sym_hashes (input_bfd).
5500
5501 When generating relocatable output, this function must handle
5502 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5503 going to be the section symbol corresponding to the output
5504 section, which means that the addend must be adjusted
5505 accordingly. */
5506
5507 static bfd_boolean
5508 ppc_elf_relocate_section (bfd *output_bfd,
5509 struct bfd_link_info *info,
5510 bfd *input_bfd,
5511 asection *input_section,
5512 bfd_byte *contents,
5513 Elf_Internal_Rela *relocs,
5514 Elf_Internal_Sym *local_syms,
5515 asection **local_sections)
5516 {
5517 Elf_Internal_Shdr *symtab_hdr;
5518 struct elf_link_hash_entry **sym_hashes;
5519 struct ppc_elf_link_hash_table *htab;
5520 Elf_Internal_Rela *rel;
5521 Elf_Internal_Rela *relend;
5522 Elf_Internal_Rela outrel;
5523 bfd_byte *loc;
5524 asection *got2, *sreloc = NULL;
5525 bfd_vma *local_got_offsets;
5526 bfd_boolean ret = TRUE;
5527
5528 #ifdef DEBUG
5529 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5530 "%ld relocations%s",
5531 input_bfd, input_section,
5532 (long) input_section->reloc_count,
5533 (info->relocatable) ? " (relocatable)" : "");
5534 #endif
5535
5536 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5537
5538 if (info->relocatable)
5539 {
5540 if (got2 == NULL)
5541 return TRUE;
5542
5543 rel = relocs;
5544 relend = relocs + input_section->reloc_count;
5545 for (; rel < relend; rel++)
5546 {
5547 enum elf_ppc_reloc_type r_type;
5548
5549 r_type = ELF32_R_TYPE (rel->r_info);
5550 if (r_type == R_PPC_PLTREL24
5551 && rel->r_addend >= 32768)
5552 {
5553 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5554 addend specifies the GOT pointer offset within .got2. */
5555 rel->r_addend += got2->output_offset;
5556 }
5557 }
5558 return TRUE;
5559 }
5560
5561 /* Initialize howto table if not already done. */
5562 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5563 ppc_elf_howto_init ();
5564
5565 htab = ppc_elf_hash_table (info);
5566 local_got_offsets = elf_local_got_offsets (input_bfd);
5567 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5568 sym_hashes = elf_sym_hashes (input_bfd);
5569 rel = relocs;
5570 relend = relocs + input_section->reloc_count;
5571 for (; rel < relend; rel++)
5572 {
5573 enum elf_ppc_reloc_type r_type;
5574 bfd_vma addend;
5575 bfd_reloc_status_type r;
5576 Elf_Internal_Sym *sym;
5577 asection *sec;
5578 struct elf_link_hash_entry *h;
5579 const char *sym_name;
5580 reloc_howto_type *howto;
5581 unsigned long r_symndx;
5582 bfd_vma relocation;
5583 bfd_vma branch_bit, insn, from;
5584 bfd_boolean unresolved_reloc;
5585 bfd_boolean warned;
5586 unsigned int tls_type, tls_mask, tls_gd;
5587
5588 r_type = ELF32_R_TYPE (rel->r_info);
5589 sym = NULL;
5590 sec = NULL;
5591 h = NULL;
5592 unresolved_reloc = FALSE;
5593 warned = FALSE;
5594 r_symndx = ELF32_R_SYM (rel->r_info);
5595
5596 if (r_symndx < symtab_hdr->sh_info)
5597 {
5598 sym = local_syms + r_symndx;
5599 sec = local_sections[r_symndx];
5600 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5601
5602 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5603 }
5604 else
5605 {
5606 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5607 r_symndx, symtab_hdr, sym_hashes,
5608 h, sec, relocation,
5609 unresolved_reloc, warned);
5610
5611 sym_name = h->root.root.string;
5612 }
5613
5614 /* TLS optimizations. Replace instruction sequences and relocs
5615 based on information we collected in tls_optimize. We edit
5616 RELOCS so that --emit-relocs will output something sensible
5617 for the final instruction stream. */
5618 tls_mask = 0;
5619 tls_gd = 0;
5620 if (IS_PPC_TLS_RELOC (r_type))
5621 {
5622 if (h != NULL)
5623 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5624 else if (local_got_offsets != NULL)
5625 {
5626 char *lgot_masks;
5627 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5628 tls_mask = lgot_masks[r_symndx];
5629 }
5630 }
5631
5632 /* Ensure reloc mapping code below stays sane. */
5633 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5634 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5635 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5636 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5637 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5638 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5639 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5640 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5641 abort ();
5642 switch (r_type)
5643 {
5644 default:
5645 break;
5646
5647 case R_PPC_GOT_TPREL16:
5648 case R_PPC_GOT_TPREL16_LO:
5649 if (tls_mask != 0
5650 && (tls_mask & TLS_TPREL) == 0)
5651 {
5652 bfd_vma insn;
5653 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5654 insn &= 31 << 21;
5655 insn |= 0x3c020000; /* addis 0,2,0 */
5656 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5657 r_type = R_PPC_TPREL16_HA;
5658 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5659 }
5660 break;
5661
5662 case R_PPC_TLS:
5663 if (tls_mask != 0
5664 && (tls_mask & TLS_TPREL) == 0)
5665 {
5666 bfd_vma insn, rtra;
5667 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5668 if ((insn & ((31 << 26) | (31 << 11)))
5669 == ((31 << 26) | (2 << 11)))
5670 rtra = insn & ((1 << 26) - (1 << 16));
5671 else if ((insn & ((31 << 26) | (31 << 16)))
5672 == ((31 << 26) | (2 << 16)))
5673 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5674 else
5675 abort ();
5676 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5677 /* add -> addi. */
5678 insn = 14 << 26;
5679 else if ((insn & (31 << 1)) == 23 << 1
5680 && ((insn & (31 << 6)) < 14 << 6
5681 || ((insn & (31 << 6)) >= 16 << 6
5682 && (insn & (31 << 6)) < 24 << 6)))
5683 /* load and store indexed -> dform. */
5684 insn = (32 | ((insn >> 6) & 31)) << 26;
5685 else if ((insn & (31 << 1)) == 21 << 1
5686 && (insn & (0x1a << 6)) == 0)
5687 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5688 insn = (((58 | ((insn >> 6) & 4)) << 26)
5689 | ((insn >> 6) & 1));
5690 else if ((insn & (31 << 1)) == 21 << 1
5691 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5692 /* lwax -> lwa. */
5693 insn = (58 << 26) | 2;
5694 else
5695 abort ();
5696 insn |= rtra;
5697 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5698 r_type = R_PPC_TPREL16_LO;
5699 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5700 /* Was PPC_TLS which sits on insn boundary, now
5701 PPC_TPREL16_LO which is at insn+2. */
5702 rel->r_offset += 2;
5703 }
5704 break;
5705
5706 case R_PPC_GOT_TLSGD16_HI:
5707 case R_PPC_GOT_TLSGD16_HA:
5708 tls_gd = TLS_TPRELGD;
5709 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5710 goto tls_gdld_hi;
5711 break;
5712
5713 case R_PPC_GOT_TLSLD16_HI:
5714 case R_PPC_GOT_TLSLD16_HA:
5715 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5716 {
5717 tls_gdld_hi:
5718 if ((tls_mask & tls_gd) != 0)
5719 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5720 + R_PPC_GOT_TPREL16);
5721 else
5722 {
5723 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5724 rel->r_offset -= 2;
5725 r_type = R_PPC_NONE;
5726 }
5727 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5728 }
5729 break;
5730
5731 case R_PPC_GOT_TLSGD16:
5732 case R_PPC_GOT_TLSGD16_LO:
5733 tls_gd = TLS_TPRELGD;
5734 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5735 goto tls_get_addr_check;
5736 break;
5737
5738 case R_PPC_GOT_TLSLD16:
5739 case R_PPC_GOT_TLSLD16_LO:
5740 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5741 {
5742 tls_get_addr_check:
5743 if (rel + 1 < relend)
5744 {
5745 enum elf_ppc_reloc_type r_type2;
5746 unsigned long r_symndx2;
5747 struct elf_link_hash_entry *h2;
5748 bfd_vma insn1, insn2;
5749 bfd_vma offset;
5750
5751 /* The next instruction should be a call to
5752 __tls_get_addr. Peek at the reloc to be sure. */
5753 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5754 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5755 if (r_symndx2 < symtab_hdr->sh_info
5756 || (r_type2 != R_PPC_REL14
5757 && r_type2 != R_PPC_REL14_BRTAKEN
5758 && r_type2 != R_PPC_REL14_BRNTAKEN
5759 && r_type2 != R_PPC_REL24
5760 && r_type2 != R_PPC_PLTREL24))
5761 break;
5762
5763 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5764 while (h2->root.type == bfd_link_hash_indirect
5765 || h2->root.type == bfd_link_hash_warning)
5766 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5767 if (h2 == NULL || h2 != htab->tls_get_addr)
5768 break;
5769
5770 /* OK, it checks out. Replace the call. */
5771 offset = rel[1].r_offset;
5772 insn1 = bfd_get_32 (output_bfd,
5773 contents + rel->r_offset - 2);
5774 if ((tls_mask & tls_gd) != 0)
5775 {
5776 /* IE */
5777 insn1 &= (1 << 26) - 1;
5778 insn1 |= 32 << 26; /* lwz */
5779 insn2 = 0x7c631214; /* add 3,3,2 */
5780 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5781 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5782 + R_PPC_GOT_TPREL16);
5783 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5784 }
5785 else
5786 {
5787 /* LE */
5788 insn1 = 0x3c620000; /* addis 3,2,0 */
5789 insn2 = 0x38630000; /* addi 3,3,0 */
5790 if (tls_gd == 0)
5791 {
5792 /* Was an LD reloc. */
5793 r_symndx = 0;
5794 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5795 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5796 }
5797 r_type = R_PPC_TPREL16_HA;
5798 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5799 rel[1].r_info = ELF32_R_INFO (r_symndx,
5800 R_PPC_TPREL16_LO);
5801 rel[1].r_offset += 2;
5802 }
5803 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5804 bfd_put_32 (output_bfd, insn2, contents + offset);
5805 if (tls_gd == 0)
5806 {
5807 /* We changed the symbol on an LD reloc. Start over
5808 in order to get h, sym, sec etc. right. */
5809 rel--;
5810 continue;
5811 }
5812 }
5813 }
5814 break;
5815 }
5816
5817 /* Handle other relocations that tweak non-addend part of insn. */
5818 branch_bit = 0;
5819 switch (r_type)
5820 {
5821 default:
5822 break;
5823
5824 /* Branch taken prediction relocations. */
5825 case R_PPC_ADDR14_BRTAKEN:
5826 case R_PPC_REL14_BRTAKEN:
5827 branch_bit = BRANCH_PREDICT_BIT;
5828 /* Fall thru */
5829
5830 /* Branch not taken prediction relocations. */
5831 case R_PPC_ADDR14_BRNTAKEN:
5832 case R_PPC_REL14_BRNTAKEN:
5833 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5834 insn &= ~BRANCH_PREDICT_BIT;
5835 insn |= branch_bit;
5836
5837 from = (rel->r_offset
5838 + input_section->output_offset
5839 + input_section->output_section->vma);
5840
5841 /* Invert 'y' bit if not the default. */
5842 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5843 insn ^= BRANCH_PREDICT_BIT;
5844
5845 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5846 break;
5847 }
5848
5849 addend = rel->r_addend;
5850 tls_type = 0;
5851 howto = NULL;
5852 if (r_type < R_PPC_max)
5853 howto = ppc_elf_howto_table[r_type];
5854 switch (r_type)
5855 {
5856 default:
5857 (*_bfd_error_handler)
5858 (_("%B: unknown relocation type %d for symbol %s"),
5859 input_bfd, (int) r_type, sym_name);
5860
5861 bfd_set_error (bfd_error_bad_value);
5862 ret = FALSE;
5863 continue;
5864
5865 case R_PPC_NONE:
5866 case R_PPC_TLS:
5867 case R_PPC_EMB_MRKREF:
5868 case R_PPC_GNU_VTINHERIT:
5869 case R_PPC_GNU_VTENTRY:
5870 continue;
5871
5872 /* GOT16 relocations. Like an ADDR16 using the symbol's
5873 address in the GOT as relocation value instead of the
5874 symbol's value itself. Also, create a GOT entry for the
5875 symbol and put the symbol value there. */
5876 case R_PPC_GOT_TLSGD16:
5877 case R_PPC_GOT_TLSGD16_LO:
5878 case R_PPC_GOT_TLSGD16_HI:
5879 case R_PPC_GOT_TLSGD16_HA:
5880 tls_type = TLS_TLS | TLS_GD;
5881 goto dogot;
5882
5883 case R_PPC_GOT_TLSLD16:
5884 case R_PPC_GOT_TLSLD16_LO:
5885 case R_PPC_GOT_TLSLD16_HI:
5886 case R_PPC_GOT_TLSLD16_HA:
5887 tls_type = TLS_TLS | TLS_LD;
5888 goto dogot;
5889
5890 case R_PPC_GOT_TPREL16:
5891 case R_PPC_GOT_TPREL16_LO:
5892 case R_PPC_GOT_TPREL16_HI:
5893 case R_PPC_GOT_TPREL16_HA:
5894 tls_type = TLS_TLS | TLS_TPREL;
5895 goto dogot;
5896
5897 case R_PPC_GOT_DTPREL16:
5898 case R_PPC_GOT_DTPREL16_LO:
5899 case R_PPC_GOT_DTPREL16_HI:
5900 case R_PPC_GOT_DTPREL16_HA:
5901 tls_type = TLS_TLS | TLS_DTPREL;
5902 goto dogot;
5903
5904 case R_PPC_GOT16:
5905 case R_PPC_GOT16_LO:
5906 case R_PPC_GOT16_HI:
5907 case R_PPC_GOT16_HA:
5908 dogot:
5909 {
5910 /* Relocation is to the entry for this symbol in the global
5911 offset table. */
5912 bfd_vma off;
5913 bfd_vma *offp;
5914 unsigned long indx;
5915
5916 if (htab->got == NULL)
5917 abort ();
5918
5919 indx = 0;
5920 if (tls_type == (TLS_TLS | TLS_LD)
5921 && (h == NULL
5922 || !h->def_dynamic))
5923 offp = &htab->tlsld_got.offset;
5924 else if (h != NULL)
5925 {
5926 bfd_boolean dyn;
5927 dyn = htab->elf.dynamic_sections_created;
5928 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5929 || (info->shared
5930 && SYMBOL_REFERENCES_LOCAL (info, h)))
5931 /* This is actually a static link, or it is a
5932 -Bsymbolic link and the symbol is defined
5933 locally, or the symbol was forced to be local
5934 because of a version file. */
5935 ;
5936 else
5937 {
5938 indx = h->dynindx;
5939 unresolved_reloc = FALSE;
5940 }
5941 offp = &h->got.offset;
5942 }
5943 else
5944 {
5945 if (local_got_offsets == NULL)
5946 abort ();
5947 offp = &local_got_offsets[r_symndx];
5948 }
5949
5950 /* The offset must always be a multiple of 4. We use the
5951 least significant bit to record whether we have already
5952 processed this entry. */
5953 off = *offp;
5954 if ((off & 1) != 0)
5955 off &= ~1;
5956 else
5957 {
5958 unsigned int tls_m = (tls_mask
5959 & (TLS_LD | TLS_GD | TLS_DTPREL
5960 | TLS_TPREL | TLS_TPRELGD));
5961
5962 if (offp == &htab->tlsld_got.offset)
5963 tls_m = TLS_LD;
5964 else if (h == NULL
5965 || !h->def_dynamic)
5966 tls_m &= ~TLS_LD;
5967
5968 /* We might have multiple got entries for this sym.
5969 Initialize them all. */
5970 do
5971 {
5972 int tls_ty = 0;
5973
5974 if ((tls_m & TLS_LD) != 0)
5975 {
5976 tls_ty = TLS_TLS | TLS_LD;
5977 tls_m &= ~TLS_LD;
5978 }
5979 else if ((tls_m & TLS_GD) != 0)
5980 {
5981 tls_ty = TLS_TLS | TLS_GD;
5982 tls_m &= ~TLS_GD;
5983 }
5984 else if ((tls_m & TLS_DTPREL) != 0)
5985 {
5986 tls_ty = TLS_TLS | TLS_DTPREL;
5987 tls_m &= ~TLS_DTPREL;
5988 }
5989 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5990 {
5991 tls_ty = TLS_TLS | TLS_TPREL;
5992 tls_m = 0;
5993 }
5994
5995 /* Generate relocs for the dynamic linker. */
5996 if ((info->shared || indx != 0)
5997 && (h == NULL
5998 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5999 || h->root.type != bfd_link_hash_undefweak))
6000 {
6001 outrel.r_offset = (htab->got->output_section->vma
6002 + htab->got->output_offset
6003 + off);
6004 outrel.r_addend = 0;
6005 if (tls_ty & (TLS_LD | TLS_GD))
6006 {
6007 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6008 if (tls_ty == (TLS_TLS | TLS_GD))
6009 {
6010 loc = htab->relgot->contents;
6011 loc += (htab->relgot->reloc_count++
6012 * sizeof (Elf32_External_Rela));
6013 bfd_elf32_swap_reloca_out (output_bfd,
6014 &outrel, loc);
6015 outrel.r_offset += 4;
6016 outrel.r_info
6017 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6018 }
6019 }
6020 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6021 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6022 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6023 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6024 else if (indx == 0)
6025 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6026 else
6027 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6028 if (indx == 0)
6029 {
6030 outrel.r_addend += relocation;
6031 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6032 outrel.r_addend -= htab->elf.tls_sec->vma;
6033 }
6034 loc = htab->relgot->contents;
6035 loc += (htab->relgot->reloc_count++
6036 * sizeof (Elf32_External_Rela));
6037 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6038 }
6039
6040 /* Init the .got section contents if we're not
6041 emitting a reloc. */
6042 else
6043 {
6044 bfd_vma value = relocation;
6045
6046 if (tls_ty == (TLS_TLS | TLS_LD))
6047 value = 1;
6048 else if (tls_ty != 0)
6049 {
6050 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6051 if (tls_ty == (TLS_TLS | TLS_TPREL))
6052 value += DTP_OFFSET - TP_OFFSET;
6053
6054 if (tls_ty == (TLS_TLS | TLS_GD))
6055 {
6056 bfd_put_32 (output_bfd, value,
6057 htab->got->contents + off + 4);
6058 value = 1;
6059 }
6060 }
6061 bfd_put_32 (output_bfd, value,
6062 htab->got->contents + off);
6063 }
6064
6065 off += 4;
6066 if (tls_ty & (TLS_LD | TLS_GD))
6067 off += 4;
6068 }
6069 while (tls_m != 0);
6070
6071 off = *offp;
6072 *offp = off | 1;
6073 }
6074
6075 if (off >= (bfd_vma) -2)
6076 abort ();
6077
6078 if ((tls_type & TLS_TLS) != 0)
6079 {
6080 if (tls_type != (TLS_TLS | TLS_LD))
6081 {
6082 if ((tls_mask & TLS_LD) != 0
6083 && !(h == NULL
6084 || !h->def_dynamic))
6085 off += 8;
6086 if (tls_type != (TLS_TLS | TLS_GD))
6087 {
6088 if ((tls_mask & TLS_GD) != 0)
6089 off += 8;
6090 if (tls_type != (TLS_TLS | TLS_DTPREL))
6091 {
6092 if ((tls_mask & TLS_DTPREL) != 0)
6093 off += 4;
6094 }
6095 }
6096 }
6097 }
6098
6099 relocation = htab->got->output_offset + off;
6100 relocation -= htab->elf.hgot->root.u.def.value;
6101
6102 /* Addends on got relocations don't make much sense.
6103 x+off@got is actually x@got+off, and since the got is
6104 generated by a hash table traversal, the value in the
6105 got at entry m+n bears little relation to the entry m. */
6106 if (addend != 0)
6107 (*_bfd_error_handler)
6108 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6109 input_bfd,
6110 input_section,
6111 (long) rel->r_offset,
6112 howto->name,
6113 sym_name);
6114 }
6115 break;
6116
6117 /* Relocations that need no special processing. */
6118 case R_PPC_LOCAL24PC:
6119 /* It makes no sense to point a local relocation
6120 at a symbol not in this object. */
6121 if (unresolved_reloc)
6122 {
6123 if (! (*info->callbacks->undefined_symbol) (info,
6124 h->root.root.string,
6125 input_bfd,
6126 input_section,
6127 rel->r_offset,
6128 TRUE))
6129 return FALSE;
6130 continue;
6131 }
6132 break;
6133
6134 case R_PPC_DTPREL16:
6135 case R_PPC_DTPREL16_LO:
6136 case R_PPC_DTPREL16_HI:
6137 case R_PPC_DTPREL16_HA:
6138 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6139 break;
6140
6141 /* Relocations that may need to be propagated if this is a shared
6142 object. */
6143 case R_PPC_TPREL16:
6144 case R_PPC_TPREL16_LO:
6145 case R_PPC_TPREL16_HI:
6146 case R_PPC_TPREL16_HA:
6147 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6148 /* The TPREL16 relocs shouldn't really be used in shared
6149 libs as they will result in DT_TEXTREL being set, but
6150 support them anyway. */
6151 goto dodyn;
6152
6153 case R_PPC_TPREL32:
6154 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6155 goto dodyn;
6156
6157 case R_PPC_DTPREL32:
6158 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6159 goto dodyn;
6160
6161 case R_PPC_DTPMOD32:
6162 relocation = 1;
6163 addend = 0;
6164 goto dodyn;
6165
6166 case R_PPC_REL16:
6167 case R_PPC_REL16_LO:
6168 case R_PPC_REL16_HI:
6169 case R_PPC_REL16_HA:
6170 break;
6171
6172 case R_PPC_REL24:
6173 case R_PPC_REL32:
6174 case R_PPC_REL14:
6175 case R_PPC_REL14_BRTAKEN:
6176 case R_PPC_REL14_BRNTAKEN:
6177 /* If these relocations are not to a named symbol, they can be
6178 handled right here, no need to bother the dynamic linker. */
6179 if (SYMBOL_REFERENCES_LOCAL (info, h)
6180 || h == htab->elf.hgot)
6181 break;
6182 /* fall through */
6183
6184 /* Relocations that always need to be propagated if this is a shared
6185 object. */
6186 case R_PPC_ADDR32:
6187 case R_PPC_ADDR24:
6188 case R_PPC_ADDR16:
6189 case R_PPC_ADDR16_LO:
6190 case R_PPC_ADDR16_HI:
6191 case R_PPC_ADDR16_HA:
6192 case R_PPC_ADDR14:
6193 case R_PPC_ADDR14_BRTAKEN:
6194 case R_PPC_ADDR14_BRNTAKEN:
6195 case R_PPC_UADDR32:
6196 case R_PPC_UADDR16:
6197 /* r_symndx will be zero only for relocs against symbols
6198 from removed linkonce sections, or sections discarded by
6199 a linker script. */
6200 dodyn:
6201 if (r_symndx == 0)
6202 break;
6203 /* Fall thru. */
6204
6205 if ((input_section->flags & SEC_ALLOC) == 0)
6206 break;
6207 /* Fall thru. */
6208
6209 if ((info->shared
6210 && (h == NULL
6211 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6212 || h->root.type != bfd_link_hash_undefweak)
6213 && (MUST_BE_DYN_RELOC (r_type)
6214 || !SYMBOL_CALLS_LOCAL (info, h)))
6215 || (ELIMINATE_COPY_RELOCS
6216 && !info->shared
6217 && h != NULL
6218 && h->dynindx != -1
6219 && !h->non_got_ref
6220 && h->def_dynamic
6221 && !h->def_regular))
6222 {
6223 int skip;
6224
6225 #ifdef DEBUG
6226 fprintf (stderr, "ppc_elf_relocate_section needs to "
6227 "create relocation for %s\n",
6228 (h && h->root.root.string
6229 ? h->root.root.string : "<unknown>"));
6230 #endif
6231
6232 /* When generating a shared object, these relocations
6233 are copied into the output file to be resolved at run
6234 time. */
6235 if (sreloc == NULL)
6236 {
6237 const char *name;
6238
6239 name = (bfd_elf_string_from_elf_section
6240 (input_bfd,
6241 elf_elfheader (input_bfd)->e_shstrndx,
6242 elf_section_data (input_section)->rel_hdr.sh_name));
6243 if (name == NULL)
6244 return FALSE;
6245
6246 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6247 && strcmp (bfd_get_section_name (input_bfd,
6248 input_section),
6249 name + 5) == 0);
6250
6251 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6252 BFD_ASSERT (sreloc != NULL);
6253 }
6254
6255 skip = 0;
6256
6257 outrel.r_offset =
6258 _bfd_elf_section_offset (output_bfd, info, input_section,
6259 rel->r_offset);
6260 if (outrel.r_offset == (bfd_vma) -1
6261 || outrel.r_offset == (bfd_vma) -2)
6262 skip = (int) outrel.r_offset;
6263 outrel.r_offset += (input_section->output_section->vma
6264 + input_section->output_offset);
6265
6266 if (skip)
6267 memset (&outrel, 0, sizeof outrel);
6268 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6269 {
6270 unresolved_reloc = FALSE;
6271 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6272 outrel.r_addend = rel->r_addend;
6273 }
6274 else
6275 {
6276 outrel.r_addend = relocation + rel->r_addend;
6277
6278 if (r_type == R_PPC_ADDR32)
6279 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6280 else
6281 {
6282 long indx;
6283
6284 if (bfd_is_abs_section (sec))
6285 indx = 0;
6286 else if (sec == NULL || sec->owner == NULL)
6287 {
6288 bfd_set_error (bfd_error_bad_value);
6289 return FALSE;
6290 }
6291 else
6292 {
6293 asection *osec;
6294
6295 /* We are turning this relocation into one
6296 against a section symbol. It would be
6297 proper to subtract the symbol's value,
6298 osec->vma, from the emitted reloc addend,
6299 but ld.so expects buggy relocs. */
6300 osec = sec->output_section;
6301 indx = elf_section_data (osec)->dynindx;
6302 BFD_ASSERT (indx > 0);
6303 #ifdef DEBUG
6304 if (indx <= 0)
6305 printf ("indx=%d section=%s flags=%08x name=%s\n",
6306 indx, osec->name, osec->flags,
6307 h->root.root.string);
6308 #endif
6309 }
6310
6311 outrel.r_info = ELF32_R_INFO (indx, r_type);
6312 }
6313 }
6314
6315 loc = sreloc->contents;
6316 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6317 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6318
6319 if (skip == -1)
6320 continue;
6321
6322 /* This reloc will be computed at runtime. We clear the memory
6323 so that it contains predictable value. */
6324 if (! skip
6325 && ((input_section->flags & SEC_ALLOC) != 0
6326 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6327 {
6328 relocation = howto->pc_relative ? outrel.r_offset : 0;
6329 addend = 0;
6330 break;
6331 }
6332 }
6333 break;
6334
6335 case R_PPC_RELAX32PC_PLT:
6336 case R_PPC_RELAX32_PLT:
6337 {
6338 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6339
6340 if (!htab->old_plt)
6341 relocation = (htab->glink->output_section->vma
6342 + htab->glink->output_offset
6343 + ent->glink_offset);
6344 else
6345 relocation = (htab->plt->output_section->vma
6346 + htab->plt->output_offset
6347 + ent->plt.offset);
6348 addend = 0;
6349 }
6350 if (r_type == R_PPC_RELAX32_PLT)
6351 goto relax32;
6352 /* Fall thru */
6353
6354 case R_PPC_RELAX32PC:
6355 relocation -= (input_section->output_section->vma
6356 + input_section->output_offset
6357 + rel->r_offset - 4);
6358 /* Fall thru */
6359
6360 case R_PPC_RELAX32:
6361 relax32:
6362 {
6363 unsigned long t0;
6364 unsigned long t1;
6365
6366 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6367 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6368
6369 /* We're clearing the bits for R_PPC_ADDR16_HA
6370 and R_PPC_ADDR16_LO here. */
6371 t0 &= ~0xffff;
6372 t1 &= ~0xffff;
6373
6374 /* t0 is HA, t1 is LO */
6375 relocation += addend;
6376 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6377 t1 |= relocation & 0xffff;
6378
6379 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6380 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6381 }
6382 continue;
6383
6384 /* Indirect .sdata relocation. */
6385 case R_PPC_EMB_SDAI16:
6386 BFD_ASSERT (htab->sdata[0].section != NULL);
6387 relocation
6388 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6389 h, relocation, rel);
6390 break;
6391
6392 /* Indirect .sdata2 relocation. */
6393 case R_PPC_EMB_SDA2I16:
6394 BFD_ASSERT (htab->sdata[1].section != NULL);
6395 relocation
6396 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6397 h, relocation, rel);
6398 break;
6399
6400 /* Handle the TOC16 reloc. We want to use the offset within the .got
6401 section, not the actual VMA. This is appropriate when generating
6402 an embedded ELF object, for which the .got section acts like the
6403 AIX .toc section. */
6404 case R_PPC_TOC16: /* phony GOT16 relocations */
6405 BFD_ASSERT (sec != NULL);
6406 BFD_ASSERT (bfd_is_und_section (sec)
6407 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6408 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6409
6410 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6411 break;
6412
6413 case R_PPC_PLTREL24:
6414 /* Relocation is to the entry for this symbol in the
6415 procedure linkage table. */
6416 {
6417 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6418
6419 addend = 0;
6420 if (ent == NULL
6421 || htab->plt == NULL)
6422 {
6423 /* We didn't make a PLT entry for this symbol. This
6424 happens when statically linking PIC code, or when
6425 using -Bsymbolic. */
6426 break;
6427 }
6428
6429 unresolved_reloc = FALSE;
6430 if (!htab->old_plt)
6431 relocation = (htab->glink->output_section->vma
6432 + htab->glink->output_offset
6433 + ent->glink_offset);
6434 else
6435 relocation = (htab->plt->output_section->vma
6436 + htab->plt->output_offset
6437 + ent->plt.offset);
6438 }
6439 break;
6440
6441 /* Relocate against _SDA_BASE_. */
6442 case R_PPC_SDAREL16:
6443 {
6444 const char *name;
6445 struct elf_link_hash_entry *sh;
6446
6447 BFD_ASSERT (sec != NULL);
6448 name = bfd_get_section_name (abfd, sec->output_section);
6449 if (! ((strncmp (name, ".sdata", 6) == 0
6450 && (name[6] == 0 || name[6] == '.'))
6451 || (strncmp (name, ".sbss", 5) == 0
6452 && (name[5] == 0 || name[5] == '.'))))
6453 {
6454 (*_bfd_error_handler)
6455 (_("%B: the target (%s) of a %s relocation is "
6456 "in the wrong output section (%s)"),
6457 input_bfd,
6458 sym_name,
6459 howto->name,
6460 name);
6461 }
6462 sh = htab->sdata[0].sym;
6463 addend -= (sh->root.u.def.value
6464 + sh->root.u.def.section->output_offset
6465 + sh->root.u.def.section->output_section->vma);
6466 }
6467 break;
6468
6469 /* Relocate against _SDA2_BASE_. */
6470 case R_PPC_EMB_SDA2REL:
6471 {
6472 const char *name;
6473 struct elf_link_hash_entry *sh;
6474
6475 BFD_ASSERT (sec != NULL);
6476 name = bfd_get_section_name (abfd, sec->output_section);
6477 if (! (strncmp (name, ".sdata2", 7) == 0
6478 || strncmp (name, ".sbss2", 6) == 0))
6479 {
6480 (*_bfd_error_handler)
6481 (_("%B: the target (%s) of a %s relocation is "
6482 "in the wrong output section (%s)"),
6483 input_bfd,
6484 sym_name,
6485 howto->name,
6486 name);
6487
6488 bfd_set_error (bfd_error_bad_value);
6489 ret = FALSE;
6490 continue;
6491 }
6492 sh = htab->sdata[1].sym;
6493 addend -= (sh->root.u.def.value
6494 + sh->root.u.def.section->output_offset
6495 + sh->root.u.def.section->output_section->vma);
6496 }
6497 break;
6498
6499 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6500 case R_PPC_EMB_SDA21:
6501 case R_PPC_EMB_RELSDA:
6502 {
6503 const char *name;
6504 int reg;
6505 struct elf_link_hash_entry *sh;
6506
6507 BFD_ASSERT (sec != NULL);
6508 name = bfd_get_section_name (abfd, sec->output_section);
6509 if (((strncmp (name, ".sdata", 6) == 0
6510 && (name[6] == 0 || name[6] == '.'))
6511 || (strncmp (name, ".sbss", 5) == 0
6512 && (name[5] == 0 || name[5] == '.'))))
6513 {
6514 reg = 13;
6515 sh = htab->sdata[0].sym;
6516 addend -= (sh->root.u.def.value
6517 + sh->root.u.def.section->output_offset
6518 + sh->root.u.def.section->output_section->vma);
6519 }
6520
6521 else if (strncmp (name, ".sdata2", 7) == 0
6522 || strncmp (name, ".sbss2", 6) == 0)
6523 {
6524 reg = 2;
6525 sh = htab->sdata[1].sym;
6526 addend -= (sh->root.u.def.value
6527 + sh->root.u.def.section->output_offset
6528 + sh->root.u.def.section->output_section->vma);
6529 }
6530
6531 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6532 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6533 {
6534 reg = 0;
6535 }
6536
6537 else
6538 {
6539 (*_bfd_error_handler)
6540 (_("%B: the target (%s) of a %s relocation is "
6541 "in the wrong output section (%s)"),
6542 input_bfd,
6543 sym_name,
6544 howto->name,
6545 name);
6546
6547 bfd_set_error (bfd_error_bad_value);
6548 ret = FALSE;
6549 continue;
6550 }
6551
6552 if (r_type == R_PPC_EMB_SDA21)
6553 { /* fill in register field */
6554 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6555 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6556 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6557 }
6558 }
6559 break;
6560
6561 /* Relocate against the beginning of the section. */
6562 case R_PPC_SECTOFF:
6563 case R_PPC_SECTOFF_LO:
6564 case R_PPC_SECTOFF_HI:
6565 case R_PPC_SECTOFF_HA:
6566 BFD_ASSERT (sec != NULL);
6567 addend -= sec->output_section->vma;
6568 break;
6569
6570 /* Negative relocations. */
6571 case R_PPC_EMB_NADDR32:
6572 case R_PPC_EMB_NADDR16:
6573 case R_PPC_EMB_NADDR16_LO:
6574 case R_PPC_EMB_NADDR16_HI:
6575 case R_PPC_EMB_NADDR16_HA:
6576 addend -= 2 * relocation;
6577 break;
6578
6579 case R_PPC_COPY:
6580 case R_PPC_GLOB_DAT:
6581 case R_PPC_JMP_SLOT:
6582 case R_PPC_RELATIVE:
6583 case R_PPC_PLT32:
6584 case R_PPC_PLTREL32:
6585 case R_PPC_PLT16_LO:
6586 case R_PPC_PLT16_HI:
6587 case R_PPC_PLT16_HA:
6588 case R_PPC_ADDR30:
6589 case R_PPC_EMB_RELSEC16:
6590 case R_PPC_EMB_RELST_LO:
6591 case R_PPC_EMB_RELST_HI:
6592 case R_PPC_EMB_RELST_HA:
6593 case R_PPC_EMB_BIT_FLD:
6594 (*_bfd_error_handler)
6595 (_("%B: relocation %s is not yet supported for symbol %s."),
6596 input_bfd,
6597 howto->name,
6598 sym_name);
6599
6600 bfd_set_error (bfd_error_invalid_operation);
6601 ret = FALSE;
6602 continue;
6603 }
6604
6605 /* Do any further special processing. */
6606 switch (r_type)
6607 {
6608 default:
6609 break;
6610
6611 case R_PPC_ADDR16_HA:
6612 case R_PPC_REL16_HA:
6613 case R_PPC_GOT16_HA:
6614 case R_PPC_PLT16_HA:
6615 case R_PPC_SECTOFF_HA:
6616 case R_PPC_TPREL16_HA:
6617 case R_PPC_DTPREL16_HA:
6618 case R_PPC_GOT_TLSGD16_HA:
6619 case R_PPC_GOT_TLSLD16_HA:
6620 case R_PPC_GOT_TPREL16_HA:
6621 case R_PPC_GOT_DTPREL16_HA:
6622 case R_PPC_EMB_NADDR16_HA:
6623 case R_PPC_EMB_RELST_HA:
6624 /* It's just possible that this symbol is a weak symbol
6625 that's not actually defined anywhere. In that case,
6626 'sec' would be NULL, and we should leave the symbol
6627 alone (it will be set to zero elsewhere in the link). */
6628 if (sec != NULL)
6629 /* Add 0x10000 if sign bit in 0:15 is set.
6630 Bits 0:15 are not used. */
6631 addend += 0x8000;
6632 break;
6633 }
6634
6635 #ifdef DEBUG
6636 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6637 "offset = %ld, addend = %ld\n",
6638 howto->name,
6639 (int) r_type,
6640 sym_name,
6641 r_symndx,
6642 (long) rel->r_offset,
6643 (long) addend);
6644 #endif
6645
6646 if (unresolved_reloc
6647 && !((input_section->flags & SEC_DEBUGGING) != 0
6648 && h->def_dynamic))
6649 {
6650 (*_bfd_error_handler)
6651 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6652 input_bfd,
6653 input_section,
6654 (long) rel->r_offset,
6655 howto->name,
6656 sym_name);
6657 ret = FALSE;
6658 }
6659
6660 r = _bfd_final_link_relocate (howto,
6661 input_bfd,
6662 input_section,
6663 contents,
6664 rel->r_offset,
6665 relocation,
6666 addend);
6667
6668 if (r != bfd_reloc_ok)
6669 {
6670 if (r == bfd_reloc_overflow)
6671 {
6672 if (warned)
6673 continue;
6674 if (h != NULL
6675 && h->root.type == bfd_link_hash_undefweak
6676 && howto->pc_relative)
6677 {
6678 /* Assume this is a call protected by other code that
6679 detect the symbol is undefined. If this is the case,
6680 we can safely ignore the overflow. If not, the
6681 program is hosed anyway, and a little warning isn't
6682 going to help. */
6683
6684 continue;
6685 }
6686
6687 if (! (*info->callbacks->reloc_overflow) (info,
6688 (h ? &h->root : NULL),
6689 sym_name,
6690 howto->name,
6691 rel->r_addend,
6692 input_bfd,
6693 input_section,
6694 rel->r_offset))
6695 return FALSE;
6696 }
6697 else
6698 {
6699 (*_bfd_error_handler)
6700 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6701 input_bfd, input_section,
6702 (long) rel->r_offset, howto->name, sym_name, (int) r);
6703 ret = FALSE;
6704 }
6705 }
6706 }
6707
6708 #ifdef DEBUG
6709 fprintf (stderr, "\n");
6710 #endif
6711
6712 return ret;
6713 }
6714 \f
6715 #define PPC_LO(v) ((v) & 0xffff)
6716 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6717 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6718
6719 /* Finish up dynamic symbol handling. We set the contents of various
6720 dynamic sections here. */
6721
6722 static bfd_boolean
6723 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6724 struct bfd_link_info *info,
6725 struct elf_link_hash_entry *h,
6726 Elf_Internal_Sym *sym)
6727 {
6728 struct ppc_elf_link_hash_table *htab;
6729 struct plt_entry *ent;
6730 bfd_boolean doneone;
6731
6732 #ifdef DEBUG
6733 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6734 h->root.root.string);
6735 #endif
6736
6737 htab = ppc_elf_hash_table (info);
6738 BFD_ASSERT (htab->elf.dynobj != NULL);
6739
6740 doneone = FALSE;
6741 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6742 if (ent->plt.offset != (bfd_vma) -1)
6743 {
6744 if (!doneone)
6745 {
6746 Elf_Internal_Rela rela;
6747 bfd_byte *loc;
6748 bfd_vma reloc_index;
6749
6750 if (!(htab->old_plt || htab->is_vxworks))
6751 reloc_index = ent->plt.offset / 4;
6752 else
6753 {
6754 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6755 / htab->plt_slot_size);
6756 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6757 && !htab->is_vxworks)
6758 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6759 }
6760
6761 /* This symbol has an entry in the procedure linkage table.
6762 Set it up. */
6763 if (htab->is_vxworks)
6764 {
6765 bfd_vma got_offset;
6766 const bfd_vma *plt_entry;
6767
6768 /* The first three entries in .got.plt are reserved. */
6769 got_offset = (reloc_index + 3) * 4;
6770
6771 /* Use the right PLT. */
6772 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6773 : ppc_elf_vxworks_plt_entry;
6774
6775 /* Fill in the .plt on VxWorks. */
6776 if (info->shared)
6777 {
6778 bfd_vma got_offset_hi = (got_offset >> 16)
6779 + ((got_offset & 0x8000) >> 15);
6780
6781 bfd_put_32 (output_bfd,
6782 plt_entry[0] | (got_offset_hi & 0xffff),
6783 htab->plt->contents + ent->plt.offset + 0);
6784 bfd_put_32 (output_bfd,
6785 plt_entry[1] | (got_offset & 0xffff),
6786 htab->plt->contents + ent->plt.offset + 4);
6787 }
6788 else
6789 {
6790 bfd_vma got_loc
6791 = (got_offset
6792 + htab->elf.hgot->root.u.def.value
6793 + htab->elf.hgot->root.u.def.section->output_offset
6794 + htab->elf.hgot->root.u.def.section->output_section->vma);
6795 bfd_vma got_loc_hi = (got_loc >> 16)
6796 + ((got_loc & 0x8000) >> 15);
6797
6798 bfd_put_32 (output_bfd,
6799 plt_entry[0] | (got_loc_hi & 0xffff),
6800 htab->plt->contents + ent->plt.offset + 0);
6801 bfd_put_32 (output_bfd,
6802 plt_entry[1] | (got_loc & 0xffff),
6803 htab->plt->contents + ent->plt.offset + 4);
6804 }
6805
6806 bfd_put_32 (output_bfd, plt_entry[2],
6807 htab->plt->contents + ent->plt.offset + 8);
6808 bfd_put_32 (output_bfd, plt_entry[3],
6809 htab->plt->contents + ent->plt.offset + 12);
6810
6811 /* This instruction is an immediate load. The value loaded is
6812 the byte offset of the R_PPC_JMP_SLOT relocation from the
6813 start of the .rela.plt section. The value is stored in the
6814 low-order 16 bits of the load instruction. */
6815 /* NOTE: It appears that this is now an index rather than a
6816 prescaled offset. */
6817 bfd_put_32 (output_bfd,
6818 plt_entry[4] | reloc_index,
6819 htab->plt->contents + ent->plt.offset + 16);
6820 /* This instruction is a PC-relative branch whose target is
6821 the start of the PLT section. The address of this branch
6822 instruction is 20 bytes beyond the start of this PLT entry.
6823 The address is encoded in bits 6-29, inclusive. The value
6824 stored is right-shifted by two bits, permitting a 26-bit
6825 offset. */
6826 bfd_put_32 (output_bfd,
6827 (plt_entry[5]
6828 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6829 htab->plt->contents + ent->plt.offset + 20);
6830 bfd_put_32 (output_bfd, plt_entry[6],
6831 htab->plt->contents + ent->plt.offset + 24);
6832 bfd_put_32 (output_bfd, plt_entry[7],
6833 htab->plt->contents + ent->plt.offset + 28);
6834
6835 /* Fill in the GOT entry corresponding to this PLT slot with
6836 the address immediately after the the "bctr" instruction
6837 in this PLT entry. */
6838 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6839 + htab->plt->output_offset
6840 + ent->plt.offset + 16),
6841 htab->sgotplt->contents + got_offset);
6842
6843 if (!info->shared)
6844 {
6845 /* Fill in a couple of entries in .rela.plt.unloaded. */
6846 loc = htab->srelplt2->contents
6847 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6848 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6849 * sizeof (Elf32_External_Rela));
6850
6851 /* Provide the @ha relocation for the first instruction. */
6852 rela.r_offset = (htab->plt->output_section->vma
6853 + htab->plt->output_offset
6854 + ent->plt.offset + 2);
6855 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6856 R_PPC_ADDR16_HA);
6857 rela.r_addend = got_offset;
6858 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6859 loc += sizeof (Elf32_External_Rela);
6860
6861 /* Provide the @l relocation for the second instruction. */
6862 rela.r_offset = (htab->plt->output_section->vma
6863 + htab->plt->output_offset
6864 + ent->plt.offset + 6);
6865 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6866 R_PPC_ADDR16_LO);
6867 rela.r_addend = got_offset;
6868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6869 loc += sizeof (Elf32_External_Rela);
6870
6871 /* Provide a relocation for the GOT entry corresponding to this
6872 PLT slot. Point it at the middle of the .plt entry. */
6873 rela.r_offset = (htab->sgotplt->output_section->vma
6874 + htab->sgotplt->output_offset
6875 + got_offset);
6876 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6877 R_PPC_ADDR32);
6878 rela.r_addend = ent->plt.offset + 16;
6879 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6880 }
6881
6882 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6883 In particular, the offset for the relocation is not the
6884 address of the PLT entry for this function, as specified
6885 by the ABI. Instead, the offset is set to the address of
6886 the GOT slot for this function. See EABI 4.4.4.1. */
6887 rela.r_offset = (htab->sgotplt->output_section->vma
6888 + htab->sgotplt->output_offset
6889 + got_offset);
6890
6891 }
6892 else
6893 {
6894 rela.r_offset = (htab->plt->output_section->vma
6895 + htab->plt->output_offset
6896 + ent->plt.offset);
6897 if (htab->old_plt)
6898 {
6899 /* We don't need to fill in the .plt. The ppc dynamic
6900 linker will fill it in. */
6901 }
6902 else
6903 {
6904 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6905 + htab->glink->output_section->vma
6906 + htab->glink->output_offset);
6907 bfd_put_32 (output_bfd, val,
6908 htab->plt->contents + ent->plt.offset);
6909 }
6910 }
6911
6912 /* Fill in the entry in the .rela.plt section. */
6913 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6914 rela.r_addend = 0;
6915
6916 loc = (htab->relplt->contents
6917 + reloc_index * sizeof (Elf32_External_Rela));
6918 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6919
6920 if (!h->def_regular)
6921 {
6922 /* Mark the symbol as undefined, rather than as defined in
6923 the .plt section. Leave the value alone. */
6924 sym->st_shndx = SHN_UNDEF;
6925 /* If the symbol is weak, we do need to clear the value.
6926 Otherwise, the PLT entry would provide a definition for
6927 the symbol even if the symbol wasn't defined anywhere,
6928 and so the symbol would never be NULL. */
6929 if (!h->ref_regular_nonweak)
6930 sym->st_value = 0;
6931 }
6932 doneone = TRUE;
6933 }
6934
6935 if (!htab->old_plt)
6936 {
6937 bfd_vma plt;
6938 unsigned char *p;
6939
6940 plt = (ent->plt.offset
6941 + htab->plt->output_section->vma
6942 + htab->plt->output_offset);
6943 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6944
6945 if (info->shared || info->pie)
6946 {
6947 bfd_vma got = 0;
6948
6949 if (ent->addend >= 32768)
6950 got = (ent->addend
6951 + ent->sec->output_section->vma
6952 + ent->sec->output_offset);
6953 else if (htab->elf.hgot != NULL)
6954 got = (htab->elf.hgot->root.u.def.value
6955 + htab->elf.hgot->root.u.def.section->output_section->vma
6956 + htab->elf.hgot->root.u.def.section->output_offset);
6957
6958 plt -= got;
6959
6960 if (plt + 0x8000 < 0x10000)
6961 {
6962 bfd_put_32 (output_bfd, LWZ_11_30 + 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 bfd_put_32 (output_bfd, NOP, p);
6969 p += 4;
6970 }
6971 else
6972 {
6973 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6974 p += 4;
6975 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6976 p += 4;
6977 bfd_put_32 (output_bfd, MTCTR_11, p);
6978 p += 4;
6979 bfd_put_32 (output_bfd, BCTR, p);
6980 p += 4;
6981 }
6982 }
6983 else
6984 {
6985 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6986 p += 4;
6987 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6988 p += 4;
6989 bfd_put_32 (output_bfd, MTCTR_11, p);
6990 p += 4;
6991 bfd_put_32 (output_bfd, BCTR, p);
6992 p += 4;
6993
6994 /* We only need one non-PIC glink stub. */
6995 break;
6996 }
6997 }
6998 else
6999 break;
7000 }
7001
7002 if (h->needs_copy)
7003 {
7004 asection *s;
7005 Elf_Internal_Rela rela;
7006 bfd_byte *loc;
7007
7008 /* This symbols needs a copy reloc. Set it up. */
7009
7010 #ifdef DEBUG
7011 fprintf (stderr, ", copy");
7012 #endif
7013
7014 BFD_ASSERT (h->dynindx != -1);
7015
7016 if (ppc_elf_hash_entry (h)->has_sda_refs)
7017 s = htab->relsbss;
7018 else
7019 s = htab->relbss;
7020 BFD_ASSERT (s != NULL);
7021
7022 rela.r_offset = (h->root.u.def.value
7023 + h->root.u.def.section->output_section->vma
7024 + h->root.u.def.section->output_offset);
7025 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7026 rela.r_addend = 0;
7027 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7028 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7029 }
7030
7031 #ifdef DEBUG
7032 fprintf (stderr, "\n");
7033 #endif
7034
7035 /* Mark some specially defined symbols as absolute. */
7036 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7037 || (!htab->is_vxworks
7038 && (h == htab->elf.hgot
7039 || strcmp (h->root.root.string,
7040 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7041 sym->st_shndx = SHN_ABS;
7042
7043 return TRUE;
7044 }
7045 \f
7046 static enum elf_reloc_type_class
7047 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7048 {
7049 switch (ELF32_R_TYPE (rela->r_info))
7050 {
7051 case R_PPC_RELATIVE:
7052 return reloc_class_relative;
7053 case R_PPC_REL24:
7054 case R_PPC_ADDR24:
7055 case R_PPC_JMP_SLOT:
7056 return reloc_class_plt;
7057 case R_PPC_COPY:
7058 return reloc_class_copy;
7059 default:
7060 return reloc_class_normal;
7061 }
7062 }
7063 \f
7064 /* Finish up the dynamic sections. */
7065
7066 static bfd_boolean
7067 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7068 struct bfd_link_info *info)
7069 {
7070 asection *sdyn;
7071 asection *splt;
7072 struct ppc_elf_link_hash_table *htab;
7073 bfd_vma got;
7074 bfd * dynobj;
7075
7076 #ifdef DEBUG
7077 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7078 #endif
7079
7080 htab = ppc_elf_hash_table (info);
7081 dynobj = elf_hash_table (info)->dynobj;
7082 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7083 if (htab->is_vxworks)
7084 splt = bfd_get_section_by_name (dynobj, ".plt");
7085 else
7086 splt = NULL;
7087
7088 got = 0;
7089 if (htab->elf.hgot != NULL)
7090 got = (htab->elf.hgot->root.u.def.value
7091 + htab->elf.hgot->root.u.def.section->output_section->vma
7092 + htab->elf.hgot->root.u.def.section->output_offset);
7093
7094 if (htab->elf.dynamic_sections_created)
7095 {
7096 Elf32_External_Dyn *dyncon, *dynconend;
7097
7098 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7099
7100 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7101 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7102 for (; dyncon < dynconend; dyncon++)
7103 {
7104 Elf_Internal_Dyn dyn;
7105 asection *s;
7106
7107 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7108
7109 switch (dyn.d_tag)
7110 {
7111 case DT_PLTGOT:
7112 if (htab->is_vxworks)
7113 s = htab->sgotplt;
7114 else
7115 s = htab->plt;
7116 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7117 break;
7118
7119 case DT_PLTRELSZ:
7120 dyn.d_un.d_val = htab->relplt->size;
7121 break;
7122
7123 case DT_JMPREL:
7124 s = htab->relplt;
7125 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7126 break;
7127
7128 case DT_PPC_GOT:
7129 dyn.d_un.d_ptr = got;
7130 break;
7131
7132 case DT_RELASZ:
7133 if (htab->is_vxworks)
7134 {
7135 if (htab->relplt)
7136 dyn.d_un.d_ptr -= htab->relplt->size;
7137 break;
7138 }
7139 continue;
7140
7141 default:
7142 continue;
7143 }
7144
7145 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7146 }
7147 }
7148
7149 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7150 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7151 if (htab->got != NULL)
7152 {
7153 unsigned char *p = htab->got->contents;
7154 bfd_vma val;
7155
7156 p += htab->elf.hgot->root.u.def.value;
7157 if (htab->old_plt && !htab->is_vxworks)
7158 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7159
7160 val = 0;
7161 if (sdyn != NULL)
7162 val = sdyn->output_section->vma + sdyn->output_offset;
7163 bfd_put_32 (output_bfd, val, p);
7164
7165 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7166 }
7167
7168 /* Fill in the first entry in the VxWorks procedure linkage table. */
7169 if (splt && splt->size > 0)
7170 {
7171 /* Use the right PLT. */
7172 static const bfd_vma *plt_entry = NULL;
7173 plt_entry = info->shared ?
7174 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7175
7176 if (!info->shared)
7177 {
7178 bfd_vma got_value =
7179 (htab->elf.hgot->root.u.def.section->output_section->vma
7180 + htab->elf.hgot->root.u.def.section->output_offset
7181 + htab->elf.hgot->root.u.def.value);
7182 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7183
7184 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7185 splt->contents + 0);
7186 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7187 splt->contents + 4);
7188 }
7189 else
7190 {
7191 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7192 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7193 }
7194 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7195 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7196 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7197 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7198 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7199 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7200
7201 if (! info->shared)
7202 {
7203 Elf_Internal_Rela rela;
7204 bfd_byte *loc;
7205
7206 loc = htab->srelplt2->contents;
7207
7208 /* Output the @ha relocation for the first instruction. */
7209 rela.r_offset = (htab->plt->output_section->vma
7210 + htab->plt->output_offset
7211 + 2);
7212 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7213 rela.r_addend = 0;
7214 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7215 loc += sizeof (Elf32_External_Rela);
7216
7217 /* Output the @l relocation for the second instruction. */
7218 rela.r_offset = (htab->plt->output_section->vma
7219 + htab->plt->output_offset
7220 + 6);
7221 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7222 rela.r_addend = 0;
7223 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7224 loc += sizeof (Elf32_External_Rela);
7225
7226 /* Fix up the remaining relocations. They may have the wrong
7227 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7228 in which symbols were output. */
7229 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7230 {
7231 Elf_Internal_Rela rel;
7232
7233 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7234 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7235 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7236 loc += sizeof (Elf32_External_Rela);
7237
7238 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7239 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7240 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7241 loc += sizeof (Elf32_External_Rela);
7242
7243 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7244 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7245 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7246 loc += sizeof (Elf32_External_Rela);
7247 }
7248 }
7249 }
7250
7251 if (htab->glink != NULL && htab->glink->contents != NULL)
7252 {
7253 unsigned char *p;
7254 unsigned char *endp;
7255 bfd_vma res0;
7256 unsigned int i;
7257
7258 /*
7259 * PIC glink code is the following:
7260 *
7261 * # ith PLT code stub.
7262 * addis 11,30,(plt+(i-1)*4-got)@ha
7263 * lwz 11,(plt+(i-1)*4-got)@l(11)
7264 * mtctr 11
7265 * bctr
7266 *
7267 * # A table of branches, one for each plt entry.
7268 * # The idea is that the plt call stub loads ctr (and r11) with these
7269 * # addresses, so (r11 - res_0) gives the plt index * 4.
7270 * res_0: b PLTresolve
7271 * res_1: b PLTresolve
7272 * .
7273 * # Some number of entries towards the end can be nops
7274 * res_n_m3: nop
7275 * res_n_m2: nop
7276 * res_n_m1:
7277 *
7278 * PLTresolve:
7279 * addis 11,11,(1f-res_0)@ha
7280 * mflr 0
7281 * bcl 20,31,1f
7282 * 1: addi 11,11,(1b-res_0)@l
7283 * mflr 12
7284 * mtlr 0
7285 * sub 11,11,12 # r11 = index * 4
7286 * addis 12,12,(got+4-1b)@ha
7287 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7288 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7289 * mtctr 0
7290 * add 0,11,11
7291 * add 11,0,11 # r11 = index * 12 = reloc offset.
7292 * bctr
7293 */
7294 static const unsigned int pic_plt_resolve[] =
7295 {
7296 ADDIS_11_11,
7297 MFLR_0,
7298 BCL_20_31,
7299 ADDI_11_11,
7300 MFLR_12,
7301 MTLR_0,
7302 SUB_11_11_12,
7303 ADDIS_12_12,
7304 LWZ_0_12,
7305 LWZ_12_12,
7306 MTCTR_0,
7307 ADD_0_11_11,
7308 ADD_11_0_11,
7309 BCTR,
7310 NOP,
7311 NOP
7312 };
7313
7314 static const unsigned int plt_resolve[] =
7315 {
7316 LIS_12,
7317 ADDIS_11_11,
7318 LWZ_0_12,
7319 ADDI_11_11,
7320 MTCTR_0,
7321 ADD_0_11_11,
7322 LWZ_12_12,
7323 ADD_11_0_11,
7324 BCTR,
7325 NOP,
7326 NOP,
7327 NOP,
7328 NOP,
7329 NOP,
7330 NOP,
7331 NOP
7332 };
7333
7334 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7335 abort ();
7336 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7337 abort ();
7338
7339 /* Build the branch table, one for each plt entry (less one),
7340 and perhaps some padding. */
7341 p = htab->glink->contents;
7342 p += htab->glink_pltresolve;
7343 endp = htab->glink->contents;
7344 endp += htab->glink->size - GLINK_PLTRESOLVE;
7345 while (p < endp - 8 * 4)
7346 {
7347 bfd_put_32 (output_bfd, B + endp - p, p);
7348 p += 4;
7349 }
7350 while (p < endp)
7351 {
7352 bfd_put_32 (output_bfd, NOP, p);
7353 p += 4;
7354 }
7355
7356 res0 = (htab->glink_pltresolve
7357 + htab->glink->output_section->vma
7358 + htab->glink->output_offset);
7359
7360 /* Last comes the PLTresolve stub. */
7361 if (info->shared || info->pie)
7362 {
7363 bfd_vma bcl;
7364
7365 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7366 {
7367 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7368 p += 4;
7369 }
7370 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7371
7372 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7373 + htab->glink->output_section->vma
7374 + htab->glink->output_offset);
7375
7376 bfd_put_32 (output_bfd,
7377 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7378 bfd_put_32 (output_bfd,
7379 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7380 bfd_put_32 (output_bfd,
7381 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7382 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7383 {
7384 bfd_put_32 (output_bfd,
7385 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7386 bfd_put_32 (output_bfd,
7387 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7388 }
7389 else
7390 {
7391 bfd_put_32 (output_bfd,
7392 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7393 bfd_put_32 (output_bfd,
7394 LWZ_12_12 + 4, p + 9*4);
7395 }
7396 }
7397 else
7398 {
7399 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7400 {
7401 bfd_put_32 (output_bfd, plt_resolve[i], p);
7402 p += 4;
7403 }
7404 p -= 4 * ARRAY_SIZE (plt_resolve);
7405
7406 bfd_put_32 (output_bfd,
7407 LIS_12 + PPC_HA (got + 4), p + 0*4);
7408 bfd_put_32 (output_bfd,
7409 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7410 bfd_put_32 (output_bfd,
7411 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7412 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7413 {
7414 bfd_put_32 (output_bfd,
7415 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7416 bfd_put_32 (output_bfd,
7417 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7418 }
7419 else
7420 {
7421 bfd_put_32 (output_bfd,
7422 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7423 bfd_put_32 (output_bfd,
7424 LWZ_12_12 + 4, p + 6*4);
7425 }
7426 }
7427 }
7428
7429 return TRUE;
7430 }
7431 \f
7432 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7433 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7434 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7435 #define TARGET_BIG_NAME "elf32-powerpc"
7436 #define ELF_ARCH bfd_arch_powerpc
7437 #define ELF_MACHINE_CODE EM_PPC
7438 #ifdef __QNXTARGET__
7439 #define ELF_MAXPAGESIZE 0x1000
7440 #else
7441 #define ELF_MAXPAGESIZE 0x10000
7442 #endif
7443 #define ELF_MINPAGESIZE 0x1000
7444 #define elf_info_to_howto ppc_elf_info_to_howto
7445
7446 #ifdef EM_CYGNUS_POWERPC
7447 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7448 #endif
7449
7450 #ifdef EM_PPC_OLD
7451 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7452 #endif
7453
7454 #define elf_backend_plt_not_loaded 1
7455 #define elf_backend_can_gc_sections 1
7456 #define elf_backend_can_refcount 1
7457 #define elf_backend_rela_normal 1
7458
7459 #define bfd_elf32_mkobject ppc_elf_mkobject
7460 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7461 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7462 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7463 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7464 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7465
7466 #define elf_backend_object_p ppc_elf_object_p
7467 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7468 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7469 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7470 #define elf_backend_relocate_section ppc_elf_relocate_section
7471 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7472 #define elf_backend_check_relocs ppc_elf_check_relocs
7473 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7474 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7475 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7476 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7477 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7478 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7479 #define elf_backend_fake_sections ppc_elf_fake_sections
7480 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7481 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7482 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7483 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7484 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7485 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7486 #define elf_backend_write_section ppc_elf_write_section
7487 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7488 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7489 #define elf_backend_action_discarded ppc_elf_action_discarded
7490
7491 #include "elf32-target.h"
7492
7493 /* VxWorks Target */
7494
7495 #undef TARGET_LITTLE_SYM
7496 #undef TARGET_LITTLE_NAME
7497
7498 #undef TARGET_BIG_SYM
7499 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7500 #undef TARGET_BIG_NAME
7501 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7502
7503 /* VxWorks uses the elf default section flags for .plt. */
7504 static const struct bfd_elf_special_section *
7505 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7506 {
7507 if (sec->name == NULL)
7508 return NULL;
7509
7510 if (strcmp (sec->name, ".plt") == 0)
7511 return _bfd_elf_get_sec_type_attr (abfd, sec);
7512
7513 return ppc_elf_get_sec_type_attr (abfd, sec);
7514 }
7515
7516 /* Like ppc_elf_link_hash_table_create, but overrides
7517 appropriately for VxWorks. */
7518 static struct bfd_link_hash_table *
7519 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7520 {
7521 struct bfd_link_hash_table *ret;
7522
7523 ret = ppc_elf_link_hash_table_create (abfd);
7524 if (ret)
7525 {
7526 struct ppc_elf_link_hash_table *htab
7527 = (struct ppc_elf_link_hash_table *)ret;
7528 htab->is_vxworks = 1;
7529 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7530 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7531 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7532 }
7533 return ret;
7534 }
7535
7536 /* Tweak magic VxWorks symbols as they are loaded. */
7537 static bfd_boolean
7538 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7539 struct bfd_link_info *info,
7540 Elf_Internal_Sym *sym,
7541 const char **namep ATTRIBUTE_UNUSED,
7542 flagword *flagsp ATTRIBUTE_UNUSED,
7543 asection **secp,
7544 bfd_vma *valp)
7545 {
7546 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7547 valp))
7548 return FALSE;
7549
7550 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7551 }
7552
7553 /* Tweak magic VxWorks symbols as they are written to the output file. */
7554 static bfd_boolean
7555 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7556 ATTRIBUTE_UNUSED,
7557 const char *name,
7558 Elf_Internal_Sym *sym,
7559 asection *input_sec ATTRIBUTE_UNUSED,
7560 struct elf_link_hash_entry *h
7561 ATTRIBUTE_UNUSED)
7562 {
7563 /* Ignore the first dummy symbol. */
7564 if (!name)
7565 return TRUE;
7566
7567 return elf_vxworks_link_output_symbol_hook (name, sym);
7568 }
7569
7570 static void
7571 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7572 {
7573 ppc_elf_final_write_processing(abfd, linker);
7574 elf_vxworks_final_write_processing(abfd, linker);
7575 }
7576
7577 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7578 define it. */
7579 #undef elf_backend_want_plt_sym
7580 #define elf_backend_want_plt_sym 1
7581 #undef elf_backend_want_got_plt
7582 #define elf_backend_want_got_plt 1
7583 #undef elf_backend_got_symbol_offset
7584 #define elf_backend_got_symbol_offset 0
7585 #undef elf_backend_plt_not_loaded
7586 #define elf_backend_plt_not_loaded 0
7587 #undef elf_backend_plt_readonly
7588 #define elf_backend_plt_readonly 1
7589 #undef elf_backend_got_header_size
7590 #define elf_backend_got_header_size 12
7591
7592 #undef bfd_elf32_bfd_link_hash_table_create
7593 #define bfd_elf32_bfd_link_hash_table_create \
7594 ppc_elf_vxworks_link_hash_table_create
7595 #undef elf_backend_add_symbol_hook
7596 #define elf_backend_add_symbol_hook \
7597 ppc_elf_vxworks_add_symbol_hook
7598 #undef elf_backend_link_output_symbol_hook
7599 #define elf_backend_link_output_symbol_hook \
7600 elf_i386_vxworks_link_output_symbol_hook
7601 #undef elf_backend_final_write_processing
7602 #define elf_backend_final_write_processing \
7603 ppc_elf_vxworks_final_write_processing
7604 #undef elf_backend_get_sec_type_attr
7605 #define elf_backend_get_sec_type_attr \
7606 ppc_elf_vxworks_get_sec_type_attr
7607 #undef elf_backend_emit_relocs
7608 #define elf_backend_emit_relocs \
7609 elf_vxworks_emit_relocs
7610
7611 #undef elf32_bed
7612 #define elf32_bed ppc_elf_vxworks_bed
7613
7614 #include "elf32-target.h"
GDB Binutils - Deliverables
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