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PR ld/2754
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 if (abfd->tdata.any == NULL)
1712 {
1713 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1714 abfd->tdata.any = bfd_zalloc (abfd, amt);
1715 if (abfd->tdata.any == NULL)
1716 return FALSE;
1717 }
1718 return bfd_elf_mkobject (abfd);
1719 }
1720
1721 /* Fix bad default arch selected for a 32 bit input bfd when the
1722 default is 64 bit. */
1723
1724 static bfd_boolean
1725 ppc_elf_object_p (bfd *abfd)
1726 {
1727 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1728 {
1729 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1730
1731 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1732 {
1733 /* Relies on arch after 64 bit default being 32 bit default. */
1734 abfd->arch_info = abfd->arch_info->next;
1735 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1736 }
1737 }
1738 return TRUE;
1739 }
1740
1741 /* Function to set whether a module needs the -mrelocatable bit set. */
1742
1743 static bfd_boolean
1744 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1745 {
1746 BFD_ASSERT (!elf_flags_init (abfd)
1747 || elf_elfheader (abfd)->e_flags == flags);
1748
1749 elf_elfheader (abfd)->e_flags = flags;
1750 elf_flags_init (abfd) = TRUE;
1751 return TRUE;
1752 }
1753
1754 /* Support for core dump NOTE sections. */
1755
1756 static bfd_boolean
1757 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1758 {
1759 int offset;
1760 unsigned int size;
1761
1762 switch (note->descsz)
1763 {
1764 default:
1765 return FALSE;
1766
1767 case 268: /* Linux/PPC. */
1768 /* pr_cursig */
1769 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1770
1771 /* pr_pid */
1772 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1773
1774 /* pr_reg */
1775 offset = 72;
1776 size = 192;
1777
1778 break;
1779 }
1780
1781 /* Make a ".reg/999" section. */
1782 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1783 size, note->descpos + offset);
1784 }
1785
1786 static bfd_boolean
1787 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1788 {
1789 switch (note->descsz)
1790 {
1791 default:
1792 return FALSE;
1793
1794 case 128: /* Linux/PPC elf_prpsinfo. */
1795 elf_tdata (abfd)->core_program
1796 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1797 elf_tdata (abfd)->core_command
1798 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1799 }
1800
1801 /* Note that for some reason, a spurious space is tacked
1802 onto the end of the args in some (at least one anyway)
1803 implementations, so strip it off if it exists. */
1804
1805 {
1806 char *command = elf_tdata (abfd)->core_command;
1807 int n = strlen (command);
1808
1809 if (0 < n && command[n - 1] == ' ')
1810 command[n - 1] = '\0';
1811 }
1812
1813 return TRUE;
1814 }
1815
1816 /* Return address for Ith PLT stub in section PLT, for relocation REL
1817 or (bfd_vma) -1 if it should not be included. */
1818
1819 static bfd_vma
1820 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1821 const asection *plt ATTRIBUTE_UNUSED,
1822 const arelent *rel)
1823 {
1824 return rel->address;
1825 }
1826
1827 /* Handle a PowerPC specific section when reading an object file. This
1828 is called when bfd_section_from_shdr finds a section with an unknown
1829 type. */
1830
1831 static bfd_boolean
1832 ppc_elf_section_from_shdr (bfd *abfd,
1833 Elf_Internal_Shdr *hdr,
1834 const char *name,
1835 int shindex)
1836 {
1837 asection *newsect;
1838 flagword flags;
1839
1840 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1841 return FALSE;
1842
1843 newsect = hdr->bfd_section;
1844 flags = bfd_get_section_flags (abfd, newsect);
1845 if (hdr->sh_flags & SHF_EXCLUDE)
1846 flags |= SEC_EXCLUDE;
1847
1848 if (hdr->sh_type == SHT_ORDERED)
1849 flags |= SEC_SORT_ENTRIES;
1850
1851 bfd_set_section_flags (abfd, newsect, flags);
1852 return TRUE;
1853 }
1854
1855 /* Set up any other section flags and such that may be necessary. */
1856
1857 static bfd_boolean
1858 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1859 Elf_Internal_Shdr *shdr,
1860 asection *asect)
1861 {
1862 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1863 shdr->sh_flags |= SHF_EXCLUDE;
1864
1865 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1866 shdr->sh_type = SHT_ORDERED;
1867
1868 return TRUE;
1869 }
1870
1871 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1872 need to bump up the number of section headers. */
1873
1874 static int
1875 ppc_elf_additional_program_headers (bfd *abfd,
1876 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1877 {
1878 asection *s;
1879 int ret = 0;
1880
1881 s = bfd_get_section_by_name (abfd, ".sbss2");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1886 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1887 ++ret;
1888
1889 return ret;
1890 }
1891
1892 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1893 .PPC.EMB.sbss0 a normal section, and not a bss section so
1894 that the linker doesn't crater when trying to make more than
1895 2 sections. */
1896
1897 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1898 {
1899 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1900 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1901 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1902 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1903 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1904 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1905 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1906 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1907 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1908 { NULL, 0, 0, 0, 0 }
1909 };
1910
1911 /* This is what we want for new plt/got. */
1912 static struct bfd_elf_special_section ppc_alt_plt =
1913 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1914
1915 static const struct bfd_elf_special_section *
1916 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1917 {
1918 const struct bfd_elf_special_section *ssect;
1919
1920 /* See if this is one of the special sections. */
1921 if (sec->name == NULL)
1922 return NULL;
1923
1924 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1925 sec->use_rela_p);
1926 if (ssect != NULL)
1927 {
1928 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1929 ssect = &ppc_alt_plt;
1930 return ssect;
1931 }
1932
1933 return _bfd_elf_get_sec_type_attr (abfd, sec);
1934 }
1935 \f
1936 /* Very simple linked list structure for recording apuinfo values. */
1937 typedef struct apuinfo_list
1938 {
1939 struct apuinfo_list *next;
1940 unsigned long value;
1941 }
1942 apuinfo_list;
1943
1944 static apuinfo_list *head;
1945
1946
1947 static void
1948 apuinfo_list_init (void)
1949 {
1950 head = NULL;
1951 }
1952
1953 static void
1954 apuinfo_list_add (unsigned long value)
1955 {
1956 apuinfo_list *entry = head;
1957
1958 while (entry != NULL)
1959 {
1960 if (entry->value == value)
1961 return;
1962 entry = entry->next;
1963 }
1964
1965 entry = bfd_malloc (sizeof (* entry));
1966 if (entry == NULL)
1967 return;
1968
1969 entry->value = value;
1970 entry->next = head;
1971 head = entry;
1972 }
1973
1974 static unsigned
1975 apuinfo_list_length (void)
1976 {
1977 apuinfo_list *entry;
1978 unsigned long count;
1979
1980 for (entry = head, count = 0;
1981 entry;
1982 entry = entry->next)
1983 ++ count;
1984
1985 return count;
1986 }
1987
1988 static inline unsigned long
1989 apuinfo_list_element (unsigned long number)
1990 {
1991 apuinfo_list * entry;
1992
1993 for (entry = head;
1994 entry && number --;
1995 entry = entry->next)
1996 ;
1997
1998 return entry ? entry->value : 0;
1999 }
2000
2001 static void
2002 apuinfo_list_finish (void)
2003 {
2004 apuinfo_list *entry;
2005
2006 for (entry = head; entry;)
2007 {
2008 apuinfo_list *next = entry->next;
2009 free (entry);
2010 entry = next;
2011 }
2012
2013 head = NULL;
2014 }
2015
2016 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2017 #define APUINFO_LABEL "APUinfo"
2018
2019 /* Scan the input BFDs and create a linked list of
2020 the APUinfo values that will need to be emitted. */
2021
2022 static void
2023 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2024 {
2025 bfd *ibfd;
2026 asection *asec;
2027 char *buffer;
2028 unsigned num_input_sections;
2029 bfd_size_type output_section_size;
2030 unsigned i;
2031 unsigned num_entries;
2032 unsigned long offset;
2033 unsigned long length;
2034 const char *error_message = NULL;
2035
2036 if (link_info == NULL)
2037 return;
2038
2039 /* Scan the input bfds, looking for apuinfo sections. */
2040 num_input_sections = 0;
2041 output_section_size = 0;
2042
2043 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2044 {
2045 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2046 if (asec)
2047 {
2048 ++ num_input_sections;
2049 output_section_size += asec->size;
2050 }
2051 }
2052
2053 /* We need at least one input sections
2054 in order to make merging worthwhile. */
2055 if (num_input_sections < 1)
2056 return;
2057
2058 /* Just make sure that the output section exists as well. */
2059 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2060 if (asec == NULL)
2061 return;
2062
2063 /* Allocate a buffer for the contents of the input sections. */
2064 buffer = bfd_malloc (output_section_size);
2065 if (buffer == NULL)
2066 return;
2067
2068 offset = 0;
2069 apuinfo_list_init ();
2070
2071 /* Read in the input sections contents. */
2072 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2073 {
2074 unsigned long datum;
2075 char *ptr;
2076
2077 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2078 if (asec == NULL)
2079 continue;
2080
2081 length = asec->size;
2082 if (length < 24)
2083 {
2084 error_message = _("corrupt or empty %s section in %B");
2085 goto fail;
2086 }
2087
2088 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2089 || (bfd_bread (buffer + offset, length, ibfd) != length))
2090 {
2091 error_message = _("unable to read in %s section from %B");
2092 goto fail;
2093 }
2094
2095 /* Process the contents of the section. */
2096 ptr = buffer + offset;
2097 error_message = _("corrupt %s section in %B");
2098
2099 /* Verify the contents of the header. Note - we have to
2100 extract the values this way in order to allow for a
2101 host whose endian-ness is different from the target. */
2102 datum = bfd_get_32 (ibfd, ptr);
2103 if (datum != sizeof APUINFO_LABEL)
2104 goto fail;
2105
2106 datum = bfd_get_32 (ibfd, ptr + 8);
2107 if (datum != 0x2)
2108 goto fail;
2109
2110 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2111 goto fail;
2112
2113 /* Get the number of bytes used for apuinfo entries. */
2114 datum = bfd_get_32 (ibfd, ptr + 4);
2115 if (datum + 20 != length)
2116 goto fail;
2117
2118 /* Make sure that we do not run off the end of the section. */
2119 if (offset + length > output_section_size)
2120 goto fail;
2121
2122 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2123 for (i = 0; i < datum; i += 4)
2124 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2125
2126 /* Update the offset. */
2127 offset += length;
2128 }
2129
2130 error_message = NULL;
2131
2132 /* Compute the size of the output section. */
2133 num_entries = apuinfo_list_length ();
2134 output_section_size = 20 + num_entries * 4;
2135
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137
2138 if (! bfd_set_section_size (abfd, asec, output_section_size))
2139 ibfd = abfd,
2140 error_message = _("warning: unable to set size of %s section in %B");
2141
2142 fail:
2143 free (buffer);
2144
2145 if (error_message)
2146 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2147 }
2148
2149 /* Prevent the output section from accumulating the input sections'
2150 contents. We have already stored this in our linked list structure. */
2151
2152 static bfd_boolean
2153 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2154 asection *asec,
2155 bfd_byte *contents ATTRIBUTE_UNUSED)
2156 {
2157 return (apuinfo_list_length ()
2158 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2159 }
2160
2161 /* Finally we can generate the output section. */
2162
2163 static void
2164 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2165 {
2166 bfd_byte *buffer;
2167 asection *asec;
2168 unsigned i;
2169 unsigned num_entries;
2170 bfd_size_type length;
2171
2172 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2173 if (asec == NULL)
2174 return;
2175
2176 if (apuinfo_list_length () == 0)
2177 return;
2178
2179 length = asec->size;
2180 if (length < 20)
2181 return;
2182
2183 buffer = bfd_malloc (length);
2184 if (buffer == NULL)
2185 {
2186 (*_bfd_error_handler)
2187 (_("failed to allocate space for new APUinfo section."));
2188 return;
2189 }
2190
2191 /* Create the apuinfo header. */
2192 num_entries = apuinfo_list_length ();
2193 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2194 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2195 bfd_put_32 (abfd, 0x2, buffer + 8);
2196 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2197
2198 length = 20;
2199 for (i = 0; i < num_entries; i++)
2200 {
2201 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2202 length += 4;
2203 }
2204
2205 if (length != asec->size)
2206 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2207
2208 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2209 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2210
2211 free (buffer);
2212
2213 apuinfo_list_finish ();
2214 }
2215 \f
2216 /* The following functions are specific to the ELF linker, while
2217 functions above are used generally. They appear in this file more
2218 or less in the order in which they are called. eg.
2219 ppc_elf_check_relocs is called early in the link process,
2220 ppc_elf_finish_dynamic_sections is one of the last functions
2221 called. */
2222
2223 /* The PPC linker needs to keep track of the number of relocs that it
2224 decides to copy as dynamic relocs in check_relocs for each symbol.
2225 This is so that it can later discard them if they are found to be
2226 unnecessary. We store the information in a field extending the
2227 regular ELF linker hash table. */
2228
2229 struct ppc_elf_dyn_relocs
2230 {
2231 struct ppc_elf_dyn_relocs *next;
2232
2233 /* The input section of the reloc. */
2234 asection *sec;
2235
2236 /* Total number of relocs copied for the input section. */
2237 bfd_size_type count;
2238
2239 /* Number of pc-relative relocs copied for the input section. */
2240 bfd_size_type pc_count;
2241 };
2242
2243 /* Track PLT entries needed for a given symbol. We might need more
2244 than one glink entry per symbol. */
2245 struct plt_entry
2246 {
2247 struct plt_entry *next;
2248
2249 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2250 This field stores the offset into .got2 used to initialise the
2251 GOT pointer reg. It will always be at least 32768 (and for
2252 current gcc this is the only offset used). */
2253 bfd_vma addend;
2254
2255 /* The .got2 section. */
2256 asection *sec;
2257
2258 /* PLT refcount or offset. */
2259 union
2260 {
2261 bfd_signed_vma refcount;
2262 bfd_vma offset;
2263 } plt;
2264
2265 /* .glink stub offset. */
2266 bfd_vma glink_offset;
2267 };
2268
2269 /* Of those relocs that might be copied as dynamic relocs, this macro
2270 selects those that must be copied when linking a shared library,
2271 even when the symbol is local. */
2272
2273 #define MUST_BE_DYN_RELOC(RTYPE) \
2274 ((RTYPE) != R_PPC_REL24 \
2275 && (RTYPE) != R_PPC_REL14 \
2276 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2277 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2278 && (RTYPE) != R_PPC_REL32)
2279
2280 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2281 copying dynamic variables from a shared lib into an app's dynbss
2282 section, and instead use a dynamic relocation to point into the
2283 shared lib. */
2284 #define ELIMINATE_COPY_RELOCS 1
2285
2286 /* PPC ELF linker hash entry. */
2287
2288 struct ppc_elf_link_hash_entry
2289 {
2290 struct elf_link_hash_entry elf;
2291
2292 /* If this symbol is used in the linker created sections, the processor
2293 specific backend uses this field to map the field into the offset
2294 from the beginning of the section. */
2295 elf_linker_section_pointers_t *linker_section_pointer;
2296
2297 /* Track dynamic relocs copied for this symbol. */
2298 struct ppc_elf_dyn_relocs *dyn_relocs;
2299
2300 /* Contexts in which symbol is used in the GOT (or TOC).
2301 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2302 corresponding relocs are encountered during check_relocs.
2303 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2304 indicate the corresponding GOT entry type is not needed. */
2305 #define TLS_GD 1 /* GD reloc. */
2306 #define TLS_LD 2 /* LD reloc. */
2307 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2308 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2309 #define TLS_TLS 16 /* Any TLS reloc. */
2310 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2311 char tls_mask;
2312
2313 /* Nonzero if we have seen a small data relocation referring to this
2314 symbol. */
2315 unsigned char has_sda_refs;
2316 };
2317
2318 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2319
2320 enum ppc_elf_plt_type {
2321 PLT_UNSET,
2322 PLT_OLD,
2323 PLT_NEW,
2324 PLT_VXWORKS
2325 };
2326
2327 /* PPC ELF linker hash table. */
2328
2329 struct ppc_elf_link_hash_table
2330 {
2331 struct elf_link_hash_table elf;
2332
2333 /* Short-cuts to get to dynamic linker sections. */
2334 asection *got;
2335 asection *relgot;
2336 asection *glink;
2337 asection *plt;
2338 asection *relplt;
2339 asection *dynbss;
2340 asection *relbss;
2341 asection *dynsbss;
2342 asection *relsbss;
2343 elf_linker_section_t sdata[2];
2344 asection *sbss;
2345
2346 /* Shortcut to .__tls_get_addr. */
2347 struct elf_link_hash_entry *tls_get_addr;
2348
2349 /* TLS local dynamic got entry handling. */
2350 union {
2351 bfd_signed_vma refcount;
2352 bfd_vma offset;
2353 } tlsld_got;
2354
2355 /* Offset of PltResolve function in glink. */
2356 bfd_vma glink_pltresolve;
2357
2358 /* Size of reserved GOT entries. */
2359 unsigned int got_header_size;
2360 /* Non-zero if allocating the header left a gap. */
2361 unsigned int got_gap;
2362
2363 /* The type of PLT we have chosen to use. */
2364 enum ppc_elf_plt_type plt_type;
2365
2366 /* Whether we can use the new PLT layout. */
2367 unsigned int can_use_new_plt:1;
2368
2369 /* Set if we should emit symbols for stubs. */
2370 unsigned int emit_stub_syms:1;
2371
2372 /* Small local sym to section mapping cache. */
2373 struct sym_sec_cache sym_sec;
2374
2375 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2376 asection *srelplt2;
2377
2378 /* The .got.plt section (VxWorks only)*/
2379 asection *sgotplt;
2380
2381 /* True if the target system is VxWorks. */
2382 int is_vxworks;
2383
2384 /* The size of PLT entries. */
2385 int plt_entry_size;
2386 /* The distance between adjacent PLT slots. */
2387 int plt_slot_size;
2388 /* The size of the first PLT entry. */
2389 int plt_initial_entry_size;
2390 };
2391
2392 /* Get the PPC ELF linker hash table from a link_info structure. */
2393
2394 #define ppc_elf_hash_table(p) \
2395 ((struct ppc_elf_link_hash_table *) (p)->hash)
2396
2397 /* Create an entry in a PPC ELF linker hash table. */
2398
2399 static struct bfd_hash_entry *
2400 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2401 struct bfd_hash_table *table,
2402 const char *string)
2403 {
2404 /* Allocate the structure if it has not already been allocated by a
2405 subclass. */
2406 if (entry == NULL)
2407 {
2408 entry = bfd_hash_allocate (table,
2409 sizeof (struct ppc_elf_link_hash_entry));
2410 if (entry == NULL)
2411 return entry;
2412 }
2413
2414 /* Call the allocation method of the superclass. */
2415 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2416 if (entry != NULL)
2417 {
2418 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2419 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2420 ppc_elf_hash_entry (entry)->tls_mask = 0;
2421 }
2422
2423 return entry;
2424 }
2425
2426 /* Create a PPC ELF linker hash table. */
2427
2428 static struct bfd_link_hash_table *
2429 ppc_elf_link_hash_table_create (bfd *abfd)
2430 {
2431 struct ppc_elf_link_hash_table *ret;
2432
2433 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2434 if (ret == NULL)
2435 return NULL;
2436
2437 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2438 ppc_elf_link_hash_newfunc,
2439 sizeof (struct ppc_elf_link_hash_entry)))
2440 {
2441 free (ret);
2442 return NULL;
2443 }
2444
2445 ret->elf.init_plt_refcount.refcount = 0;
2446 ret->elf.init_plt_refcount.glist = NULL;
2447 ret->elf.init_plt_offset.offset = 0;
2448 ret->elf.init_plt_offset.glist = NULL;
2449
2450 ret->sdata[0].name = ".sdata";
2451 ret->sdata[0].sym_name = "_SDA_BASE_";
2452 ret->sdata[0].bss_name = ".sbss";
2453
2454 ret->sdata[1].name = ".sdata2";
2455 ret->sdata[1].sym_name = "_SDA2_BASE_";
2456 ret->sdata[1].bss_name = ".sbss2";
2457
2458 ret->plt_entry_size = 12;
2459 ret->plt_slot_size = 8;
2460 ret->plt_initial_entry_size = 72;
2461
2462 ret->is_vxworks = 0;
2463
2464 return &ret->elf.root;
2465 }
2466
2467 /* Create .got and the related sections. */
2468
2469 static bfd_boolean
2470 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2471 {
2472 struct ppc_elf_link_hash_table *htab;
2473 asection *s;
2474 flagword flags;
2475
2476 if (!_bfd_elf_create_got_section (abfd, info))
2477 return FALSE;
2478
2479 htab = ppc_elf_hash_table (info);
2480 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2481 if (s == NULL)
2482 abort ();
2483
2484 if (htab->is_vxworks)
2485 {
2486 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2487 if (!htab->sgotplt)
2488 abort ();
2489 }
2490 else
2491 {
2492 /* The powerpc .got has a blrl instruction in it. Mark it
2493 executable. */
2494 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2495 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2496 if (!bfd_set_section_flags (abfd, s, flags))
2497 return FALSE;
2498 }
2499
2500 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2501 | SEC_LINKER_CREATED | SEC_READONLY);
2502 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2503 if (!htab->relgot
2504 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2505 return FALSE;
2506
2507 return TRUE;
2508 }
2509
2510 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2511 to output sections (just like _bfd_elf_create_dynamic_sections has
2512 to create .dynbss and .rela.bss). */
2513
2514 static bfd_boolean
2515 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2516 {
2517 struct ppc_elf_link_hash_table *htab;
2518 asection *s;
2519 flagword flags;
2520
2521 htab = ppc_elf_hash_table (info);
2522
2523 if (htab->got == NULL
2524 && !ppc_elf_create_got (abfd, info))
2525 return FALSE;
2526
2527 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2528 return FALSE;
2529
2530 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2531 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2532
2533 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2534 htab->glink = s;
2535 if (s == NULL
2536 || !bfd_set_section_alignment (abfd, s, 4))
2537 return FALSE;
2538
2539 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2540 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2541 SEC_ALLOC | SEC_LINKER_CREATED);
2542 htab->dynsbss = s;
2543 if (s == NULL)
2544 return FALSE;
2545
2546 if (! info->shared)
2547 {
2548 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2549 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2550 htab->relsbss = s;
2551 if (s == NULL
2552 || ! bfd_set_section_alignment (abfd, s, 2))
2553 return FALSE;
2554 }
2555
2556 if (htab->is_vxworks
2557 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2558 return FALSE;
2559
2560 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2561 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2562 if (s == NULL)
2563 abort ();
2564
2565 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2566 if (htab->plt_type == PLT_VXWORKS)
2567 /* The VxWorks PLT is a loaded section with contents. */
2568 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2569 return bfd_set_section_flags (abfd, s, flags);
2570 }
2571
2572 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2573
2574 static void
2575 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2576 struct elf_link_hash_entry *dir,
2577 struct elf_link_hash_entry *ind)
2578 {
2579 struct ppc_elf_link_hash_entry *edir, *eind;
2580
2581 edir = (struct ppc_elf_link_hash_entry *) dir;
2582 eind = (struct ppc_elf_link_hash_entry *) ind;
2583
2584 if (eind->dyn_relocs != NULL)
2585 {
2586 if (edir->dyn_relocs != NULL)
2587 {
2588 struct ppc_elf_dyn_relocs **pp;
2589 struct ppc_elf_dyn_relocs *p;
2590
2591 /* Add reloc counts against the indirect sym to the direct sym
2592 list. Merge any entries against the same section. */
2593 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2594 {
2595 struct ppc_elf_dyn_relocs *q;
2596
2597 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2598 if (q->sec == p->sec)
2599 {
2600 q->pc_count += p->pc_count;
2601 q->count += p->count;
2602 *pp = p->next;
2603 break;
2604 }
2605 if (q == NULL)
2606 pp = &p->next;
2607 }
2608 *pp = edir->dyn_relocs;
2609 }
2610
2611 edir->dyn_relocs = eind->dyn_relocs;
2612 eind->dyn_relocs = NULL;
2613 }
2614
2615 edir->tls_mask |= eind->tls_mask;
2616 edir->has_sda_refs |= eind->has_sda_refs;
2617
2618 /* If called to transfer flags for a weakdef during processing
2619 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2620 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2621 if (!(ELIMINATE_COPY_RELOCS
2622 && eind->elf.root.type != bfd_link_hash_indirect
2623 && edir->elf.dynamic_adjusted))
2624 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2625
2626 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2627 edir->elf.ref_regular |= eind->elf.ref_regular;
2628 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2629 edir->elf.needs_plt |= eind->elf.needs_plt;
2630
2631 /* If we were called to copy over info for a weak sym, that's all. */
2632 if (eind->elf.root.type != bfd_link_hash_indirect)
2633 return;
2634
2635 /* Copy over the GOT refcount entries that we may have already seen to
2636 the symbol which just became indirect. */
2637 edir->elf.got.refcount += eind->elf.got.refcount;
2638 eind->elf.got.refcount = 0;
2639
2640 /* And plt entries. */
2641 if (eind->elf.plt.plist != NULL)
2642 {
2643 if (edir->elf.plt.plist != NULL)
2644 {
2645 struct plt_entry **entp;
2646 struct plt_entry *ent;
2647
2648 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2649 {
2650 struct plt_entry *dent;
2651
2652 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2653 if (dent->sec == ent->sec && dent->addend == ent->addend)
2654 {
2655 dent->plt.refcount += ent->plt.refcount;
2656 *entp = ent->next;
2657 break;
2658 }
2659 if (dent == NULL)
2660 entp = &ent->next;
2661 }
2662 *entp = edir->elf.plt.plist;
2663 }
2664
2665 edir->elf.plt.plist = eind->elf.plt.plist;
2666 eind->elf.plt.plist = NULL;
2667 }
2668
2669 if (eind->elf.dynindx != -1)
2670 {
2671 if (edir->elf.dynindx != -1)
2672 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2673 edir->elf.dynstr_index);
2674 edir->elf.dynindx = eind->elf.dynindx;
2675 edir->elf.dynstr_index = eind->elf.dynstr_index;
2676 eind->elf.dynindx = -1;
2677 eind->elf.dynstr_index = 0;
2678 }
2679 }
2680
2681 /* Return 1 if target is one of ours. */
2682
2683 static bfd_boolean
2684 is_ppc_elf_target (const struct bfd_target *targ)
2685 {
2686 extern const bfd_target bfd_elf32_powerpc_vec;
2687 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2688 extern const bfd_target bfd_elf32_powerpcle_vec;
2689
2690 return (targ == &bfd_elf32_powerpc_vec
2691 || targ == &bfd_elf32_powerpc_vxworks_vec
2692 || targ == &bfd_elf32_powerpcle_vec);
2693 }
2694
2695 /* Hook called by the linker routine which adds symbols from an object
2696 file. We use it to put .comm items in .sbss, and not .bss. */
2697
2698 static bfd_boolean
2699 ppc_elf_add_symbol_hook (bfd *abfd,
2700 struct bfd_link_info *info,
2701 Elf_Internal_Sym *sym,
2702 const char **namep ATTRIBUTE_UNUSED,
2703 flagword *flagsp ATTRIBUTE_UNUSED,
2704 asection **secp,
2705 bfd_vma *valp)
2706 {
2707 if (sym->st_shndx == SHN_COMMON
2708 && !info->relocatable
2709 && sym->st_size <= elf_gp_size (abfd)
2710 && is_ppc_elf_target (info->hash->creator))
2711 {
2712 /* Common symbols less than or equal to -G nn bytes are automatically
2713 put into .sbss. */
2714 struct ppc_elf_link_hash_table *htab;
2715
2716 htab = ppc_elf_hash_table (info);
2717 if (htab->sbss == NULL)
2718 {
2719 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2720
2721 if (!htab->elf.dynobj)
2722 htab->elf.dynobj = abfd;
2723
2724 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2725 ".sbss",
2726 flags);
2727 if (htab->sbss == NULL)
2728 return FALSE;
2729 }
2730
2731 *secp = htab->sbss;
2732 *valp = sym->st_size;
2733 }
2734
2735 return TRUE;
2736 }
2737 \f
2738 static bfd_boolean
2739 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2740 elf_linker_section_t *lsect)
2741 {
2742 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2743 TRUE, FALSE, TRUE);
2744 if (lsect->sym == NULL)
2745 return FALSE;
2746 if (lsect->sym->root.type == bfd_link_hash_new)
2747 lsect->sym->non_elf = 0;
2748 lsect->sym->ref_regular = 1;
2749 return TRUE;
2750 }
2751
2752 /* Create a special linker section. */
2753
2754 static bfd_boolean
2755 ppc_elf_create_linker_section (bfd *abfd,
2756 struct bfd_link_info *info,
2757 flagword flags,
2758 elf_linker_section_t *lsect)
2759 {
2760 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2761 asection *s;
2762
2763 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2764 | SEC_LINKER_CREATED);
2765
2766 /* Record the first bfd that needs the special sections. */
2767 if (!htab->elf.dynobj)
2768 htab->elf.dynobj = abfd;
2769
2770 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2771 lsect->name,
2772 flags);
2773 if (s == NULL
2774 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2775 return FALSE;
2776 lsect->section = s;
2777
2778 return create_sdata_sym (htab, lsect);
2779 }
2780
2781 /* Find a linker generated pointer with a given addend and type. */
2782
2783 static elf_linker_section_pointers_t *
2784 elf_find_pointer_linker_section
2785 (elf_linker_section_pointers_t *linker_pointers,
2786 bfd_vma addend,
2787 elf_linker_section_t *lsect)
2788 {
2789 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2790 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2791 return linker_pointers;
2792
2793 return NULL;
2794 }
2795
2796 /* Allocate a pointer to live in a linker created section. */
2797
2798 static bfd_boolean
2799 elf_create_pointer_linker_section (bfd *abfd,
2800 elf_linker_section_t *lsect,
2801 struct elf_link_hash_entry *h,
2802 const Elf_Internal_Rela *rel)
2803 {
2804 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2805 elf_linker_section_pointers_t *linker_section_ptr;
2806 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2807 bfd_size_type amt;
2808
2809 BFD_ASSERT (lsect != NULL);
2810
2811 /* Is this a global symbol? */
2812 if (h != NULL)
2813 {
2814 struct ppc_elf_link_hash_entry *eh;
2815
2816 /* Has this symbol already been allocated? If so, our work is done. */
2817 eh = (struct ppc_elf_link_hash_entry *) h;
2818 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2819 rel->r_addend,
2820 lsect))
2821 return TRUE;
2822
2823 ptr_linker_section_ptr = &eh->linker_section_pointer;
2824 }
2825 else
2826 {
2827 /* Allocation of a pointer to a local symbol. */
2828 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2829
2830 /* Allocate a table to hold the local symbols if first time. */
2831 if (!ptr)
2832 {
2833 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2834
2835 amt = num_symbols;
2836 amt *= sizeof (elf_linker_section_pointers_t *);
2837 ptr = bfd_zalloc (abfd, amt);
2838
2839 if (!ptr)
2840 return FALSE;
2841
2842 elf_local_ptr_offsets (abfd) = ptr;
2843 }
2844
2845 /* Has this symbol already been allocated? If so, our work is done. */
2846 if (elf_find_pointer_linker_section (ptr[r_symndx],
2847 rel->r_addend,
2848 lsect))
2849 return TRUE;
2850
2851 ptr_linker_section_ptr = &ptr[r_symndx];
2852 }
2853
2854 /* Allocate space for a pointer in the linker section, and allocate
2855 a new pointer record from internal memory. */
2856 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2857 amt = sizeof (elf_linker_section_pointers_t);
2858 linker_section_ptr = bfd_alloc (abfd, amt);
2859
2860 if (!linker_section_ptr)
2861 return FALSE;
2862
2863 linker_section_ptr->next = *ptr_linker_section_ptr;
2864 linker_section_ptr->addend = rel->r_addend;
2865 linker_section_ptr->lsect = lsect;
2866 *ptr_linker_section_ptr = linker_section_ptr;
2867
2868 linker_section_ptr->offset = lsect->section->size;
2869 lsect->section->size += 4;
2870
2871 #ifdef DEBUG
2872 fprintf (stderr,
2873 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2874 lsect->name, (long) linker_section_ptr->offset,
2875 (long) lsect->section->size);
2876 #endif
2877
2878 return TRUE;
2879 }
2880
2881 static bfd_boolean
2882 update_local_sym_info (bfd *abfd,
2883 Elf_Internal_Shdr *symtab_hdr,
2884 unsigned long r_symndx,
2885 int tls_type)
2886 {
2887 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2888 char *local_got_tls_masks;
2889
2890 if (local_got_refcounts == NULL)
2891 {
2892 bfd_size_type size = symtab_hdr->sh_info;
2893
2894 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2895 local_got_refcounts = bfd_zalloc (abfd, size);
2896 if (local_got_refcounts == NULL)
2897 return FALSE;
2898 elf_local_got_refcounts (abfd) = local_got_refcounts;
2899 }
2900
2901 local_got_refcounts[r_symndx] += 1;
2902 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2903 local_got_tls_masks[r_symndx] |= tls_type;
2904 return TRUE;
2905 }
2906
2907 static bfd_boolean
2908 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2909 asection *sec, bfd_vma addend)
2910 {
2911 struct plt_entry *ent;
2912
2913 if (addend < 32768)
2914 sec = NULL;
2915 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2916 if (ent->sec == sec && ent->addend == addend)
2917 break;
2918 if (ent == NULL)
2919 {
2920 bfd_size_type amt = sizeof (*ent);
2921 ent = bfd_alloc (abfd, amt);
2922 if (ent == NULL)
2923 return FALSE;
2924 ent->next = h->plt.plist;
2925 ent->sec = sec;
2926 ent->addend = addend;
2927 ent->plt.refcount = 0;
2928 h->plt.plist = ent;
2929 }
2930 ent->plt.refcount += 1;
2931 return TRUE;
2932 }
2933
2934 static struct plt_entry *
2935 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2936 {
2937 struct plt_entry *ent;
2938
2939 if (addend < 32768)
2940 sec = NULL;
2941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2942 if (ent->sec == sec && ent->addend == addend)
2943 break;
2944 return ent;
2945 }
2946
2947 static void
2948 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2949 {
2950 (*_bfd_error_handler)
2951 (_("%B: relocation %s cannot be used when making a shared object"),
2952 abfd,
2953 ppc_elf_howto_table[r_type]->name);
2954 bfd_set_error (bfd_error_bad_value);
2955 }
2956
2957 /* Look through the relocs for a section during the first phase, and
2958 allocate space in the global offset table or procedure linkage
2959 table. */
2960
2961 static bfd_boolean
2962 ppc_elf_check_relocs (bfd *abfd,
2963 struct bfd_link_info *info,
2964 asection *sec,
2965 const Elf_Internal_Rela *relocs)
2966 {
2967 struct ppc_elf_link_hash_table *htab;
2968 Elf_Internal_Shdr *symtab_hdr;
2969 struct elf_link_hash_entry **sym_hashes;
2970 const Elf_Internal_Rela *rel;
2971 const Elf_Internal_Rela *rel_end;
2972 asection *got2, *sreloc;
2973
2974 if (info->relocatable)
2975 return TRUE;
2976
2977 /* Don't do anything special with non-loaded, non-alloced sections.
2978 In particular, any relocs in such sections should not affect GOT
2979 and PLT reference counting (ie. we don't allow them to create GOT
2980 or PLT entries), there's no possibility or desire to optimize TLS
2981 relocs, and there's not much point in propagating relocs to shared
2982 libs that the dynamic linker won't relocate. */
2983 if ((sec->flags & SEC_ALLOC) == 0)
2984 return TRUE;
2985
2986 #ifdef DEBUG
2987 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2988 sec, abfd);
2989 #endif
2990
2991 /* Initialize howto table if not already done. */
2992 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2993 ppc_elf_howto_init ();
2994
2995 htab = ppc_elf_hash_table (info);
2996 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2997 sym_hashes = elf_sym_hashes (abfd);
2998 got2 = bfd_get_section_by_name (abfd, ".got2");
2999 sreloc = NULL;
3000
3001 rel_end = relocs + sec->reloc_count;
3002 for (rel = relocs; rel < rel_end; rel++)
3003 {
3004 unsigned long r_symndx;
3005 enum elf_ppc_reloc_type r_type;
3006 struct elf_link_hash_entry *h;
3007 int tls_type = 0;
3008
3009 r_symndx = ELF32_R_SYM (rel->r_info);
3010 if (r_symndx < symtab_hdr->sh_info)
3011 h = NULL;
3012 else
3013 {
3014 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3015 while (h->root.type == bfd_link_hash_indirect
3016 || h->root.type == bfd_link_hash_warning)
3017 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3018 }
3019
3020 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3021 This shows up in particular in an R_PPC_ADDR32 in the eabi
3022 startup code. */
3023 if (h != NULL
3024 && htab->got == NULL
3025 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3026 {
3027 if (htab->elf.dynobj == NULL)
3028 htab->elf.dynobj = abfd;
3029 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3030 return FALSE;
3031 BFD_ASSERT (h == htab->elf.hgot);
3032 }
3033
3034 r_type = ELF32_R_TYPE (rel->r_info);
3035 switch (r_type)
3036 {
3037 case R_PPC_GOT_TLSLD16:
3038 case R_PPC_GOT_TLSLD16_LO:
3039 case R_PPC_GOT_TLSLD16_HI:
3040 case R_PPC_GOT_TLSLD16_HA:
3041 htab->tlsld_got.refcount += 1;
3042 tls_type = TLS_TLS | TLS_LD;
3043 goto dogottls;
3044
3045 case R_PPC_GOT_TLSGD16:
3046 case R_PPC_GOT_TLSGD16_LO:
3047 case R_PPC_GOT_TLSGD16_HI:
3048 case R_PPC_GOT_TLSGD16_HA:
3049 tls_type = TLS_TLS | TLS_GD;
3050 goto dogottls;
3051
3052 case R_PPC_GOT_TPREL16:
3053 case R_PPC_GOT_TPREL16_LO:
3054 case R_PPC_GOT_TPREL16_HI:
3055 case R_PPC_GOT_TPREL16_HA:
3056 if (info->shared)
3057 info->flags |= DF_STATIC_TLS;
3058 tls_type = TLS_TLS | TLS_TPREL;
3059 goto dogottls;
3060
3061 case R_PPC_GOT_DTPREL16:
3062 case R_PPC_GOT_DTPREL16_LO:
3063 case R_PPC_GOT_DTPREL16_HI:
3064 case R_PPC_GOT_DTPREL16_HA:
3065 tls_type = TLS_TLS | TLS_DTPREL;
3066 dogottls:
3067 sec->has_tls_reloc = 1;
3068 /* Fall thru */
3069
3070 /* GOT16 relocations */
3071 case R_PPC_GOT16:
3072 case R_PPC_GOT16_LO:
3073 case R_PPC_GOT16_HI:
3074 case R_PPC_GOT16_HA:
3075 /* This symbol requires a global offset table entry. */
3076 if (htab->got == NULL)
3077 {
3078 if (htab->elf.dynobj == NULL)
3079 htab->elf.dynobj = abfd;
3080 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3081 return FALSE;
3082 }
3083 if (h != NULL)
3084 {
3085 h->got.refcount += 1;
3086 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3087 }
3088 else
3089 /* This is a global offset table entry for a local symbol. */
3090 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3091 return FALSE;
3092 break;
3093
3094 /* Indirect .sdata relocation. */
3095 case R_PPC_EMB_SDAI16:
3096 if (info->shared)
3097 {
3098 bad_shared_reloc (abfd, r_type);
3099 return FALSE;
3100 }
3101 if (htab->sdata[0].section == NULL
3102 && !ppc_elf_create_linker_section (abfd, info, 0,
3103 &htab->sdata[0]))
3104 return FALSE;
3105 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3106 h, rel))
3107 return FALSE;
3108 if (h != NULL)
3109 {
3110 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3111 h->non_got_ref = TRUE;
3112 }
3113 break;
3114
3115 /* Indirect .sdata2 relocation. */
3116 case R_PPC_EMB_SDA2I16:
3117 if (info->shared)
3118 {
3119 bad_shared_reloc (abfd, r_type);
3120 return FALSE;
3121 }
3122 if (htab->sdata[1].section == NULL
3123 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3124 &htab->sdata[1]))
3125 return FALSE;
3126 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3127 h, rel))
3128 return FALSE;
3129 if (h != NULL)
3130 {
3131 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3132 h->non_got_ref = TRUE;
3133 }
3134 break;
3135
3136 case R_PPC_SDAREL16:
3137 if (info->shared)
3138 {
3139 bad_shared_reloc (abfd, r_type);
3140 return FALSE;
3141 }
3142 if (htab->sdata[0].sym == NULL
3143 && !create_sdata_sym (htab, &htab->sdata[0]))
3144 return FALSE;
3145 if (h != NULL)
3146 {
3147 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3148 h->non_got_ref = TRUE;
3149 }
3150 break;
3151
3152 case R_PPC_EMB_SDA2REL:
3153 if (info->shared)
3154 {
3155 bad_shared_reloc (abfd, r_type);
3156 return FALSE;
3157 }
3158 if (htab->sdata[1].sym == NULL
3159 && !create_sdata_sym (htab, &htab->sdata[1]))
3160 return FALSE;
3161 if (h != NULL)
3162 {
3163 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3164 h->non_got_ref = TRUE;
3165 }
3166 break;
3167
3168 case R_PPC_EMB_SDA21:
3169 case R_PPC_EMB_RELSDA:
3170 if (info->shared)
3171 {
3172 bad_shared_reloc (abfd, r_type);
3173 return FALSE;
3174 }
3175 if (htab->sdata[0].sym == NULL
3176 && !create_sdata_sym (htab, &htab->sdata[0]))
3177 return FALSE;
3178 if (htab->sdata[1].sym == NULL
3179 && !create_sdata_sym (htab, &htab->sdata[1]))
3180 return FALSE;
3181 if (h != NULL)
3182 {
3183 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3184 h->non_got_ref = TRUE;
3185 }
3186 break;
3187
3188 case R_PPC_EMB_NADDR32:
3189 case R_PPC_EMB_NADDR16:
3190 case R_PPC_EMB_NADDR16_LO:
3191 case R_PPC_EMB_NADDR16_HI:
3192 case R_PPC_EMB_NADDR16_HA:
3193 if (info->shared)
3194 {
3195 bad_shared_reloc (abfd, r_type);
3196 return FALSE;
3197 }
3198 if (h != NULL)
3199 h->non_got_ref = TRUE;
3200 break;
3201
3202 case R_PPC_PLT32:
3203 case R_PPC_PLTREL24:
3204 case R_PPC_PLTREL32:
3205 case R_PPC_PLT16_LO:
3206 case R_PPC_PLT16_HI:
3207 case R_PPC_PLT16_HA:
3208 #ifdef DEBUG
3209 fprintf (stderr, "Reloc requires a PLT entry\n");
3210 #endif
3211 /* This symbol requires a procedure linkage table entry. We
3212 actually build the entry in finish_dynamic_symbol,
3213 because this might be a case of linking PIC code without
3214 linking in any dynamic objects, in which case we don't
3215 need to generate a procedure linkage table after all. */
3216
3217 if (h == NULL)
3218 {
3219 /* It does not make sense to have a procedure linkage
3220 table entry for a local symbol. */
3221 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3222 "local symbol"),
3223 abfd,
3224 sec,
3225 (long) rel->r_offset,
3226 ppc_elf_howto_table[r_type]->name);
3227 bfd_set_error (bfd_error_bad_value);
3228 return FALSE;
3229 }
3230 else
3231 {
3232 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3233
3234 h->needs_plt = 1;
3235 if (!update_plt_info (abfd, h, got2, addend))
3236 return FALSE;
3237 }
3238 break;
3239
3240 /* The following relocations don't need to propagate the
3241 relocation if linking a shared object since they are
3242 section relative. */
3243 case R_PPC_SECTOFF:
3244 case R_PPC_SECTOFF_LO:
3245 case R_PPC_SECTOFF_HI:
3246 case R_PPC_SECTOFF_HA:
3247 case R_PPC_DTPREL16:
3248 case R_PPC_DTPREL16_LO:
3249 case R_PPC_DTPREL16_HI:
3250 case R_PPC_DTPREL16_HA:
3251 case R_PPC_TOC16:
3252 break;
3253
3254 case R_PPC_REL16:
3255 case R_PPC_REL16_LO:
3256 case R_PPC_REL16_HI:
3257 case R_PPC_REL16_HA:
3258 htab->can_use_new_plt = 1;
3259 break;
3260
3261 /* These are just markers. */
3262 case R_PPC_TLS:
3263 case R_PPC_EMB_MRKREF:
3264 case R_PPC_NONE:
3265 case R_PPC_max:
3266 break;
3267
3268 /* These should only appear in dynamic objects. */
3269 case R_PPC_COPY:
3270 case R_PPC_GLOB_DAT:
3271 case R_PPC_JMP_SLOT:
3272 case R_PPC_RELATIVE:
3273 break;
3274
3275 /* These aren't handled yet. We'll report an error later. */
3276 case R_PPC_ADDR30:
3277 case R_PPC_EMB_RELSEC16:
3278 case R_PPC_EMB_RELST_LO:
3279 case R_PPC_EMB_RELST_HI:
3280 case R_PPC_EMB_RELST_HA:
3281 case R_PPC_EMB_BIT_FLD:
3282 break;
3283
3284 /* This refers only to functions defined in the shared library. */
3285 case R_PPC_LOCAL24PC:
3286 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3287 htab->plt_type = PLT_OLD;
3288 break;
3289
3290 /* This relocation describes the C++ object vtable hierarchy.
3291 Reconstruct it for later use during GC. */
3292 case R_PPC_GNU_VTINHERIT:
3293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3294 return FALSE;
3295 break;
3296
3297 /* This relocation describes which C++ vtable entries are actually
3298 used. Record for later use during GC. */
3299 case R_PPC_GNU_VTENTRY:
3300 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3301 return FALSE;
3302 break;
3303
3304 /* We shouldn't really be seeing these. */
3305 case R_PPC_TPREL32:
3306 if (info->shared)
3307 info->flags |= DF_STATIC_TLS;
3308 goto dodyn;
3309
3310 /* Nor these. */
3311 case R_PPC_DTPMOD32:
3312 case R_PPC_DTPREL32:
3313 goto dodyn;
3314
3315 case R_PPC_TPREL16:
3316 case R_PPC_TPREL16_LO:
3317 case R_PPC_TPREL16_HI:
3318 case R_PPC_TPREL16_HA:
3319 if (info->shared)
3320 info->flags |= DF_STATIC_TLS;
3321 goto dodyn;
3322
3323 case R_PPC_REL32:
3324 if (h == NULL
3325 && got2 != NULL
3326 && (sec->flags & SEC_CODE) != 0
3327 && (info->shared || info->pie)
3328 && htab->plt_type == PLT_UNSET)
3329 {
3330 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3331 the start of a function, which assembles to a REL32
3332 reference to .got2. If we detect one of these, then
3333 force the old PLT layout because the linker cannot
3334 reliably deduce the GOT pointer value needed for
3335 PLT call stubs. */
3336 asection *s;
3337
3338 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3339 r_symndx);
3340 if (s == got2)
3341 htab->plt_type = PLT_OLD;
3342 }
3343 if (h == NULL || h == htab->elf.hgot)
3344 break;
3345 goto dodyn1;
3346
3347 case R_PPC_REL24:
3348 case R_PPC_REL14:
3349 case R_PPC_REL14_BRTAKEN:
3350 case R_PPC_REL14_BRNTAKEN:
3351 if (h == NULL)
3352 break;
3353 if (h == htab->elf.hgot)
3354 {
3355 if (htab->plt_type == PLT_UNSET)
3356 htab->plt_type = PLT_OLD;
3357 break;
3358 }
3359 /* fall through */
3360
3361 case R_PPC_ADDR32:
3362 case R_PPC_ADDR24:
3363 case R_PPC_ADDR16:
3364 case R_PPC_ADDR16_LO:
3365 case R_PPC_ADDR16_HI:
3366 case R_PPC_ADDR16_HA:
3367 case R_PPC_ADDR14:
3368 case R_PPC_ADDR14_BRTAKEN:
3369 case R_PPC_ADDR14_BRNTAKEN:
3370 case R_PPC_UADDR32:
3371 case R_PPC_UADDR16:
3372 dodyn1:
3373 if (h != NULL && !info->shared)
3374 {
3375 /* We may need a plt entry if the symbol turns out to be
3376 a function defined in a dynamic object. */
3377 if (!update_plt_info (abfd, h, NULL, 0))
3378 return FALSE;
3379
3380 /* We may need a copy reloc too. */
3381 h->non_got_ref = 1;
3382 }
3383
3384 dodyn:
3385 /* If we are creating a shared library, and this is a reloc
3386 against a global symbol, or a non PC relative reloc
3387 against a local symbol, then we need to copy the reloc
3388 into the shared library. However, if we are linking with
3389 -Bsymbolic, we do not need to copy a reloc against a
3390 global symbol which is defined in an object we are
3391 including in the link (i.e., DEF_REGULAR is set). At
3392 this point we have not seen all the input files, so it is
3393 possible that DEF_REGULAR is not set now but will be set
3394 later (it is never cleared). In case of a weak definition,
3395 DEF_REGULAR may be cleared later by a strong definition in
3396 a shared library. We account for that possibility below by
3397 storing information in the dyn_relocs field of the hash
3398 table entry. A similar situation occurs when creating
3399 shared libraries and symbol visibility changes render the
3400 symbol local.
3401
3402 If on the other hand, we are creating an executable, we
3403 may need to keep relocations for symbols satisfied by a
3404 dynamic library if we manage to avoid copy relocs for the
3405 symbol. */
3406 if ((info->shared
3407 && (MUST_BE_DYN_RELOC (r_type)
3408 || (h != NULL
3409 && (! info->symbolic
3410 || h->root.type == bfd_link_hash_defweak
3411 || !h->def_regular))))
3412 || (ELIMINATE_COPY_RELOCS
3413 && !info->shared
3414 && h != NULL
3415 && (h->root.type == bfd_link_hash_defweak
3416 || !h->def_regular)))
3417 {
3418 struct ppc_elf_dyn_relocs *p;
3419 struct ppc_elf_dyn_relocs **head;
3420
3421 #ifdef DEBUG
3422 fprintf (stderr,
3423 "ppc_elf_check_relocs needs to "
3424 "create relocation for %s\n",
3425 (h && h->root.root.string
3426 ? h->root.root.string : "<unknown>"));
3427 #endif
3428 if (sreloc == NULL)
3429 {
3430 const char *name;
3431
3432 name = (bfd_elf_string_from_elf_section
3433 (abfd,
3434 elf_elfheader (abfd)->e_shstrndx,
3435 elf_section_data (sec)->rel_hdr.sh_name));
3436 if (name == NULL)
3437 return FALSE;
3438
3439 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3440 && strcmp (bfd_get_section_name (abfd, sec),
3441 name + 5) == 0);
3442
3443 if (htab->elf.dynobj == NULL)
3444 htab->elf.dynobj = abfd;
3445 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3446 if (sreloc == NULL)
3447 {
3448 flagword flags;
3449
3450 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3451 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3452 | SEC_ALLOC | SEC_LOAD);
3453 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3454 name,
3455 flags);
3456 if (sreloc == NULL
3457 || ! bfd_set_section_alignment (htab->elf.dynobj,
3458 sreloc, 2))
3459 return FALSE;
3460 }
3461 elf_section_data (sec)->sreloc = sreloc;
3462 }
3463
3464 /* If this is a global symbol, we count the number of
3465 relocations we need for this symbol. */
3466 if (h != NULL)
3467 {
3468 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3469 }
3470 else
3471 {
3472 /* Track dynamic relocs needed for local syms too.
3473 We really need local syms available to do this
3474 easily. Oh well. */
3475
3476 asection *s;
3477 void *vpp;
3478
3479 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3480 sec, r_symndx);
3481 if (s == NULL)
3482 return FALSE;
3483
3484 vpp = &elf_section_data (s)->local_dynrel;
3485 head = (struct ppc_elf_dyn_relocs **) vpp;
3486 }
3487
3488 p = *head;
3489 if (p == NULL || p->sec != sec)
3490 {
3491 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3492 if (p == NULL)
3493 return FALSE;
3494 p->next = *head;
3495 *head = p;
3496 p->sec = sec;
3497 p->count = 0;
3498 p->pc_count = 0;
3499 }
3500
3501 p->count += 1;
3502 if (!MUST_BE_DYN_RELOC (r_type))
3503 p->pc_count += 1;
3504 }
3505
3506 break;
3507 }
3508 }
3509
3510 return TRUE;
3511 }
3512 \f
3513 /* Merge backend specific data from an object file to the output
3514 object file when linking. */
3515
3516 static bfd_boolean
3517 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3518 {
3519 flagword old_flags;
3520 flagword new_flags;
3521 bfd_boolean error;
3522
3523 if (!is_ppc_elf_target (ibfd->xvec)
3524 || !is_ppc_elf_target (obfd->xvec))
3525 return TRUE;
3526
3527 /* Check if we have the same endianess. */
3528 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3529 return FALSE;
3530
3531 new_flags = elf_elfheader (ibfd)->e_flags;
3532 old_flags = elf_elfheader (obfd)->e_flags;
3533 if (!elf_flags_init (obfd))
3534 {
3535 /* First call, no flags set. */
3536 elf_flags_init (obfd) = TRUE;
3537 elf_elfheader (obfd)->e_flags = new_flags;
3538 }
3539
3540 /* Compatible flags are ok. */
3541 else if (new_flags == old_flags)
3542 ;
3543
3544 /* Incompatible flags. */
3545 else
3546 {
3547 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3548 to be linked with either. */
3549 error = FALSE;
3550 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3551 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3552 {
3553 error = TRUE;
3554 (*_bfd_error_handler)
3555 (_("%B: compiled with -mrelocatable and linked with "
3556 "modules compiled normally"), ibfd);
3557 }
3558 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3559 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3560 {
3561 error = TRUE;
3562 (*_bfd_error_handler)
3563 (_("%B: compiled normally and linked with "
3564 "modules compiled with -mrelocatable"), ibfd);
3565 }
3566
3567 /* The output is -mrelocatable-lib iff both the input files are. */
3568 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3569 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3570
3571 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3572 but each input file is either -mrelocatable or -mrelocatable-lib. */
3573 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3574 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3575 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3576 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3577
3578 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3579 any module uses it. */
3580 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3581
3582 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3583 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3584
3585 /* Warn about any other mismatches. */
3586 if (new_flags != old_flags)
3587 {
3588 error = TRUE;
3589 (*_bfd_error_handler)
3590 (_("%B: uses different e_flags (0x%lx) fields "
3591 "than previous modules (0x%lx)"),
3592 ibfd, (long) new_flags, (long) old_flags);
3593 }
3594
3595 if (error)
3596 {
3597 bfd_set_error (bfd_error_bad_value);
3598 return FALSE;
3599 }
3600 }
3601
3602 return TRUE;
3603 }
3604 \f
3605 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3606 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3607 int
3608 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3609 struct bfd_link_info *info,
3610 int force_old_plt,
3611 int emit_stub_syms)
3612 {
3613 struct ppc_elf_link_hash_table *htab;
3614 flagword flags;
3615
3616 htab = ppc_elf_hash_table (info);
3617
3618 if (htab->plt_type == PLT_UNSET)
3619 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3620 ? PLT_OLD : PLT_NEW);
3621
3622 htab->emit_stub_syms = emit_stub_syms;
3623
3624 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3625
3626 if (htab->plt_type == PLT_NEW)
3627 {
3628 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3629 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3630
3631 /* The new PLT is a loaded section. */
3632 if (htab->plt != NULL
3633 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3634 return -1;
3635
3636 /* The new GOT is not executable. */
3637 if (htab->got != NULL
3638 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3639 return -1;
3640 }
3641 else
3642 {
3643 /* Stop an unused .glink section from affecting .text alignment. */
3644 if (htab->glink != NULL
3645 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3646 return -1;
3647 }
3648 return htab->plt_type == PLT_NEW;
3649 }
3650 \f
3651 /* Return the section that should be marked against GC for a given
3652 relocation. */
3653
3654 static asection *
3655 ppc_elf_gc_mark_hook (asection *sec,
3656 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3657 Elf_Internal_Rela *rel,
3658 struct elf_link_hash_entry *h,
3659 Elf_Internal_Sym *sym)
3660 {
3661 if (h != NULL)
3662 {
3663 switch (ELF32_R_TYPE (rel->r_info))
3664 {
3665 case R_PPC_GNU_VTINHERIT:
3666 case R_PPC_GNU_VTENTRY:
3667 break;
3668
3669 default:
3670 switch (h->root.type)
3671 {
3672 case bfd_link_hash_defined:
3673 case bfd_link_hash_defweak:
3674 return h->root.u.def.section;
3675
3676 case bfd_link_hash_common:
3677 return h->root.u.c.p->section;
3678
3679 default:
3680 break;
3681 }
3682 }
3683 }
3684 else
3685 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3686
3687 return NULL;
3688 }
3689
3690 /* Update the got, plt and dynamic reloc reference counts for the
3691 section being removed. */
3692
3693 static bfd_boolean
3694 ppc_elf_gc_sweep_hook (bfd *abfd,
3695 struct bfd_link_info *info,
3696 asection *sec,
3697 const Elf_Internal_Rela *relocs)
3698 {
3699 struct ppc_elf_link_hash_table *htab;
3700 Elf_Internal_Shdr *symtab_hdr;
3701 struct elf_link_hash_entry **sym_hashes;
3702 bfd_signed_vma *local_got_refcounts;
3703 const Elf_Internal_Rela *rel, *relend;
3704 asection *got2;
3705
3706 if ((sec->flags & SEC_ALLOC) == 0)
3707 return TRUE;
3708
3709 elf_section_data (sec)->local_dynrel = NULL;
3710
3711 htab = ppc_elf_hash_table (info);
3712 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3713 sym_hashes = elf_sym_hashes (abfd);
3714 local_got_refcounts = elf_local_got_refcounts (abfd);
3715 got2 = bfd_get_section_by_name (abfd, ".got2");
3716
3717 relend = relocs + sec->reloc_count;
3718 for (rel = relocs; rel < relend; rel++)
3719 {
3720 unsigned long r_symndx;
3721 enum elf_ppc_reloc_type r_type;
3722 struct elf_link_hash_entry *h = NULL;
3723
3724 r_symndx = ELF32_R_SYM (rel->r_info);
3725 if (r_symndx >= symtab_hdr->sh_info)
3726 {
3727 struct ppc_elf_dyn_relocs **pp, *p;
3728 struct ppc_elf_link_hash_entry *eh;
3729
3730 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3731 while (h->root.type == bfd_link_hash_indirect
3732 || h->root.type == bfd_link_hash_warning)
3733 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3734 eh = (struct ppc_elf_link_hash_entry *) h;
3735
3736 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3737 if (p->sec == sec)
3738 {
3739 /* Everything must go for SEC. */
3740 *pp = p->next;
3741 break;
3742 }
3743 }
3744
3745 r_type = ELF32_R_TYPE (rel->r_info);
3746 switch (r_type)
3747 {
3748 case R_PPC_GOT_TLSLD16:
3749 case R_PPC_GOT_TLSLD16_LO:
3750 case R_PPC_GOT_TLSLD16_HI:
3751 case R_PPC_GOT_TLSLD16_HA:
3752 htab->tlsld_got.refcount -= 1;
3753 /* Fall thru */
3754
3755 case R_PPC_GOT_TLSGD16:
3756 case R_PPC_GOT_TLSGD16_LO:
3757 case R_PPC_GOT_TLSGD16_HI:
3758 case R_PPC_GOT_TLSGD16_HA:
3759 case R_PPC_GOT_TPREL16:
3760 case R_PPC_GOT_TPREL16_LO:
3761 case R_PPC_GOT_TPREL16_HI:
3762 case R_PPC_GOT_TPREL16_HA:
3763 case R_PPC_GOT_DTPREL16:
3764 case R_PPC_GOT_DTPREL16_LO:
3765 case R_PPC_GOT_DTPREL16_HI:
3766 case R_PPC_GOT_DTPREL16_HA:
3767 case R_PPC_GOT16:
3768 case R_PPC_GOT16_LO:
3769 case R_PPC_GOT16_HI:
3770 case R_PPC_GOT16_HA:
3771 if (h != NULL)
3772 {
3773 if (h->got.refcount > 0)
3774 h->got.refcount--;
3775 }
3776 else if (local_got_refcounts != NULL)
3777 {
3778 if (local_got_refcounts[r_symndx] > 0)
3779 local_got_refcounts[r_symndx]--;
3780 }
3781 break;
3782
3783 case R_PPC_REL24:
3784 case R_PPC_REL14:
3785 case R_PPC_REL14_BRTAKEN:
3786 case R_PPC_REL14_BRNTAKEN:
3787 case R_PPC_REL32:
3788 if (h == NULL || h == htab->elf.hgot)
3789 break;
3790 /* Fall thru */
3791
3792 case R_PPC_ADDR32:
3793 case R_PPC_ADDR24:
3794 case R_PPC_ADDR16:
3795 case R_PPC_ADDR16_LO:
3796 case R_PPC_ADDR16_HI:
3797 case R_PPC_ADDR16_HA:
3798 case R_PPC_ADDR14:
3799 case R_PPC_ADDR14_BRTAKEN:
3800 case R_PPC_ADDR14_BRNTAKEN:
3801 case R_PPC_UADDR32:
3802 case R_PPC_UADDR16:
3803 if (info->shared)
3804 break;
3805
3806 case R_PPC_PLT32:
3807 case R_PPC_PLTREL24:
3808 case R_PPC_PLTREL32:
3809 case R_PPC_PLT16_LO:
3810 case R_PPC_PLT16_HI:
3811 case R_PPC_PLT16_HA:
3812 if (h != NULL)
3813 {
3814 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3815 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3816 if (ent->plt.refcount > 0)
3817 ent->plt.refcount -= 1;
3818 }
3819 break;
3820
3821 default:
3822 break;
3823 }
3824 }
3825 return TRUE;
3826 }
3827 \f
3828 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3829
3830 asection *
3831 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3832 {
3833 struct ppc_elf_link_hash_table *htab;
3834
3835 htab = ppc_elf_hash_table (info);
3836 if (htab->plt_type == PLT_NEW
3837 && htab->plt != NULL
3838 && htab->plt->output_section != NULL)
3839 {
3840 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3841 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3842 }
3843
3844 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3845 FALSE, FALSE, TRUE);
3846 return _bfd_elf_tls_setup (obfd, info);
3847 }
3848
3849 /* Run through all the TLS relocs looking for optimization
3850 opportunities. */
3851
3852 bfd_boolean
3853 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3854 struct bfd_link_info *info)
3855 {
3856 bfd *ibfd;
3857 asection *sec;
3858 struct ppc_elf_link_hash_table *htab;
3859
3860 if (info->relocatable || info->shared)
3861 return TRUE;
3862
3863 htab = ppc_elf_hash_table (info);
3864 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3865 {
3866 Elf_Internal_Sym *locsyms = NULL;
3867 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3868
3869 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3870 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3871 {
3872 Elf_Internal_Rela *relstart, *rel, *relend;
3873 int expecting_tls_get_addr;
3874
3875 /* Read the relocations. */
3876 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3877 info->keep_memory);
3878 if (relstart == NULL)
3879 return FALSE;
3880
3881 expecting_tls_get_addr = 0;
3882 relend = relstart + sec->reloc_count;
3883 for (rel = relstart; rel < relend; rel++)
3884 {
3885 enum elf_ppc_reloc_type r_type;
3886 unsigned long r_symndx;
3887 struct elf_link_hash_entry *h = NULL;
3888 char *tls_mask;
3889 char tls_set, tls_clear;
3890 bfd_boolean is_local;
3891
3892 r_symndx = ELF32_R_SYM (rel->r_info);
3893 if (r_symndx >= symtab_hdr->sh_info)
3894 {
3895 struct elf_link_hash_entry **sym_hashes;
3896
3897 sym_hashes = elf_sym_hashes (ibfd);
3898 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3899 while (h->root.type == bfd_link_hash_indirect
3900 || h->root.type == bfd_link_hash_warning)
3901 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3902 }
3903
3904 is_local = FALSE;
3905 if (h == NULL
3906 || !h->def_dynamic)
3907 is_local = TRUE;
3908
3909 r_type = ELF32_R_TYPE (rel->r_info);
3910 switch (r_type)
3911 {
3912 case R_PPC_GOT_TLSLD16:
3913 case R_PPC_GOT_TLSLD16_LO:
3914 case R_PPC_GOT_TLSLD16_HI:
3915 case R_PPC_GOT_TLSLD16_HA:
3916 /* These relocs should never be against a symbol
3917 defined in a shared lib. Leave them alone if
3918 that turns out to be the case. */
3919 expecting_tls_get_addr = 0;
3920 htab->tlsld_got.refcount -= 1;
3921 if (!is_local)
3922 continue;
3923
3924 /* LD -> LE */
3925 tls_set = 0;
3926 tls_clear = TLS_LD;
3927 expecting_tls_get_addr = 1;
3928 break;
3929
3930 case R_PPC_GOT_TLSGD16:
3931 case R_PPC_GOT_TLSGD16_LO:
3932 case R_PPC_GOT_TLSGD16_HI:
3933 case R_PPC_GOT_TLSGD16_HA:
3934 if (is_local)
3935 /* GD -> LE */
3936 tls_set = 0;
3937 else
3938 /* GD -> IE */
3939 tls_set = TLS_TLS | TLS_TPRELGD;
3940 tls_clear = TLS_GD;
3941 expecting_tls_get_addr = 1;
3942 break;
3943
3944 case R_PPC_GOT_TPREL16:
3945 case R_PPC_GOT_TPREL16_LO:
3946 case R_PPC_GOT_TPREL16_HI:
3947 case R_PPC_GOT_TPREL16_HA:
3948 expecting_tls_get_addr = 0;
3949 if (is_local)
3950 {
3951 /* IE -> LE */
3952 tls_set = 0;
3953 tls_clear = TLS_TPREL;
3954 break;
3955 }
3956 else
3957 continue;
3958
3959 case R_PPC_REL14:
3960 case R_PPC_REL14_BRTAKEN:
3961 case R_PPC_REL14_BRNTAKEN:
3962 case R_PPC_REL24:
3963 if (expecting_tls_get_addr
3964 && h != NULL
3965 && h == htab->tls_get_addr)
3966 {
3967 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3968 if (ent != NULL && ent->plt.refcount > 0)
3969 ent->plt.refcount -= 1;
3970 }
3971 expecting_tls_get_addr = 0;
3972 continue;
3973
3974 default:
3975 expecting_tls_get_addr = 0;
3976 continue;
3977 }
3978
3979 if (h != NULL)
3980 {
3981 if (tls_set == 0)
3982 {
3983 /* We managed to get rid of a got entry. */
3984 if (h->got.refcount > 0)
3985 h->got.refcount -= 1;
3986 }
3987 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3988 }
3989 else
3990 {
3991 Elf_Internal_Sym *sym;
3992 bfd_signed_vma *lgot_refs;
3993 char *lgot_masks;
3994
3995 if (locsyms == NULL)
3996 {
3997 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3998 if (locsyms == NULL)
3999 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4000 symtab_hdr->sh_info,
4001 0, NULL, NULL, NULL);
4002 if (locsyms == NULL)
4003 {
4004 if (elf_section_data (sec)->relocs != relstart)
4005 free (relstart);
4006 return FALSE;
4007 }
4008 }
4009 sym = locsyms + r_symndx;
4010 lgot_refs = elf_local_got_refcounts (ibfd);
4011 if (lgot_refs == NULL)
4012 abort ();
4013 if (tls_set == 0)
4014 {
4015 /* We managed to get rid of a got entry. */
4016 if (lgot_refs[r_symndx] > 0)
4017 lgot_refs[r_symndx] -= 1;
4018 }
4019 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4020 tls_mask = &lgot_masks[r_symndx];
4021 }
4022
4023 *tls_mask |= tls_set;
4024 *tls_mask &= ~tls_clear;
4025 }
4026
4027 if (elf_section_data (sec)->relocs != relstart)
4028 free (relstart);
4029 }
4030
4031 if (locsyms != NULL
4032 && (symtab_hdr->contents != (unsigned char *) locsyms))
4033 {
4034 if (!info->keep_memory)
4035 free (locsyms);
4036 else
4037 symtab_hdr->contents = (unsigned char *) locsyms;
4038 }
4039 }
4040 return TRUE;
4041 }
4042 \f
4043 /* Adjust a symbol defined by a dynamic object and referenced by a
4044 regular object. The current definition is in some section of the
4045 dynamic object, but we're not including those sections. We have to
4046 change the definition to something the rest of the link can
4047 understand. */
4048
4049 static bfd_boolean
4050 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4051 struct elf_link_hash_entry *h)
4052 {
4053 struct ppc_elf_link_hash_table *htab;
4054 asection *s;
4055 unsigned int power_of_two;
4056
4057 #ifdef DEBUG
4058 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4059 h->root.root.string);
4060 #endif
4061
4062 /* Make sure we know what is going on here. */
4063 htab = ppc_elf_hash_table (info);
4064 BFD_ASSERT (htab->elf.dynobj != NULL
4065 && (h->needs_plt
4066 || h->u.weakdef != NULL
4067 || (h->def_dynamic
4068 && h->ref_regular
4069 && !h->def_regular)));
4070
4071 /* Deal with function syms. */
4072 if (h->type == STT_FUNC
4073 || h->needs_plt)
4074 {
4075 /* Clear procedure linkage table information for any symbol that
4076 won't need a .plt entry. */
4077 struct plt_entry *ent;
4078 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4079 if (ent->plt.refcount > 0)
4080 break;
4081 if (ent == NULL
4082 || SYMBOL_CALLS_LOCAL (info, h)
4083 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4084 && h->root.type == bfd_link_hash_undefweak))
4085 {
4086 /* A PLT entry is not required/allowed when:
4087
4088 1. We are not using ld.so; because then the PLT entry
4089 can't be set up, so we can't use one. In this case,
4090 ppc_elf_adjust_dynamic_symbol won't even be called.
4091
4092 2. GC has rendered the entry unused.
4093
4094 3. We know for certain that a call to this symbol
4095 will go to this object, or will remain undefined. */
4096 h->plt.plist = NULL;
4097 h->needs_plt = 0;
4098 }
4099 return TRUE;
4100 }
4101 else
4102 h->plt.plist = NULL;
4103
4104 /* If this is a weak symbol, and there is a real definition, the
4105 processor independent code will have arranged for us to see the
4106 real definition first, and we can just use the same value. */
4107 if (h->u.weakdef != NULL)
4108 {
4109 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4110 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4111 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4112 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4113 if (ELIMINATE_COPY_RELOCS)
4114 h->non_got_ref = h->u.weakdef->non_got_ref;
4115 return TRUE;
4116 }
4117
4118 /* This is a reference to a symbol defined by a dynamic object which
4119 is not a function. */
4120
4121 /* If we are creating a shared library, we must presume that the
4122 only references to the symbol are via the global offset table.
4123 For such cases we need not do anything here; the relocations will
4124 be handled correctly by relocate_section. */
4125 if (info->shared)
4126 return TRUE;
4127
4128 /* If there are no references to this symbol that do not use the
4129 GOT, we don't need to generate a copy reloc. */
4130 if (!h->non_got_ref)
4131 return TRUE;
4132
4133 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4134 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4135 do this if there are any small data relocations. */
4136 if (ELIMINATE_COPY_RELOCS
4137 && !ppc_elf_hash_entry (h)->has_sda_refs)
4138 {
4139 struct ppc_elf_dyn_relocs *p;
4140 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4141 {
4142 s = p->sec->output_section;
4143 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4144 break;
4145 }
4146
4147 if (p == NULL)
4148 {
4149 h->non_got_ref = 0;
4150 return TRUE;
4151 }
4152 }
4153
4154 if (h->size == 0)
4155 {
4156 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4157 h->root.root.string);
4158 return TRUE;
4159 }
4160
4161 /* We must allocate the symbol in our .dynbss section, which will
4162 become part of the .bss section of the executable. There will be
4163 an entry for this symbol in the .dynsym section. The dynamic
4164 object will contain position independent code, so all references
4165 from the dynamic object to this symbol will go through the global
4166 offset table. The dynamic linker will use the .dynsym entry to
4167 determine the address it must put in the global offset table, so
4168 both the dynamic object and the regular object will refer to the
4169 same memory location for the variable.
4170
4171 Of course, if the symbol is referenced using SDAREL relocs, we
4172 must instead allocate it in .sbss. */
4173
4174 if (ppc_elf_hash_entry (h)->has_sda_refs)
4175 s = htab->dynsbss;
4176 else
4177 s = htab->dynbss;
4178 BFD_ASSERT (s != NULL);
4179
4180 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4181 copy the initial value out of the dynamic object and into the
4182 runtime process image. We need to remember the offset into the
4183 .rela.bss section we are going to use. */
4184 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4185 {
4186 asection *srel;
4187
4188 if (ppc_elf_hash_entry (h)->has_sda_refs)
4189 srel = htab->relsbss;
4190 else
4191 srel = htab->relbss;
4192 BFD_ASSERT (srel != NULL);
4193 srel->size += sizeof (Elf32_External_Rela);
4194 h->needs_copy = 1;
4195 }
4196
4197 /* We need to figure out the alignment required for this symbol. I
4198 have no idea how ELF linkers handle this. */
4199 power_of_two = bfd_log2 (h->size);
4200 if (power_of_two > 4)
4201 power_of_two = 4;
4202
4203 /* Apply the required alignment. */
4204 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4205 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4206 {
4207 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4208 return FALSE;
4209 }
4210
4211 /* Define the symbol as being at this point in the section. */
4212 h->root.u.def.section = s;
4213 h->root.u.def.value = s->size;
4214
4215 /* Increment the section size to make room for the symbol. */
4216 s->size += h->size;
4217
4218 return TRUE;
4219 }
4220 \f
4221 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4222 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4223 specifying the addend on the plt relocation. For -fpic code, the sym
4224 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4225 xxxxxxxx.got2.plt_pic32.<callee>. */
4226
4227 static bfd_boolean
4228 add_stub_sym (struct plt_entry *ent,
4229 struct elf_link_hash_entry *h,
4230 struct bfd_link_info *info)
4231 {
4232 struct elf_link_hash_entry *sh;
4233 size_t len1, len2, len3;
4234 char *name;
4235 const char *stub;
4236 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4237
4238 if (info->shared || info->pie)
4239 stub = ".plt_pic32.";
4240 else
4241 stub = ".plt_call32.";
4242
4243 len1 = strlen (h->root.root.string);
4244 len2 = strlen (stub);
4245 len3 = 0;
4246 if (ent->sec)
4247 len3 = strlen (ent->sec->name);
4248 name = bfd_malloc (len1 + len2 + len3 + 9);
4249 if (name == NULL)
4250 return FALSE;
4251 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4252 if (ent->sec)
4253 memcpy (name + 8, ent->sec->name, len3);
4254 memcpy (name + 8 + len3, stub, len2);
4255 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4256 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4257 if (sh == NULL)
4258 return FALSE;
4259 if (sh->root.type == bfd_link_hash_new)
4260 {
4261 sh->root.type = bfd_link_hash_defined;
4262 sh->root.u.def.section = htab->glink;
4263 sh->root.u.def.value = ent->glink_offset;
4264 sh->ref_regular = 1;
4265 sh->def_regular = 1;
4266 sh->ref_regular_nonweak = 1;
4267 sh->forced_local = 1;
4268 sh->non_elf = 0;
4269 }
4270 return TRUE;
4271 }
4272
4273 /* Allocate NEED contiguous space in .got, and return the offset.
4274 Handles allocation of the got header when crossing 32k. */
4275
4276 static bfd_vma
4277 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4278 {
4279 bfd_vma where;
4280 unsigned int max_before_header;
4281
4282 if (htab->plt_type == PLT_VXWORKS)
4283 {
4284 where = htab->got->size;
4285 htab->got->size += need;
4286 }
4287 else
4288 {
4289 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4290 if (need <= htab->got_gap)
4291 {
4292 where = max_before_header - htab->got_gap;
4293 htab->got_gap -= need;
4294 }
4295 else
4296 {
4297 if (htab->got->size + need > max_before_header
4298 && htab->got->size <= max_before_header)
4299 {
4300 htab->got_gap = max_before_header - htab->got->size;
4301 htab->got->size = max_before_header + htab->got_header_size;
4302 }
4303 where = htab->got->size;
4304 htab->got->size += need;
4305 }
4306 }
4307 return where;
4308 }
4309
4310 /* Allocate space in associated reloc sections for dynamic relocs. */
4311
4312 static bfd_boolean
4313 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4314 {
4315 struct bfd_link_info *info = inf;
4316 struct ppc_elf_link_hash_entry *eh;
4317 struct ppc_elf_link_hash_table *htab;
4318 struct ppc_elf_dyn_relocs *p;
4319
4320 if (h->root.type == bfd_link_hash_indirect)
4321 return TRUE;
4322
4323 if (h->root.type == bfd_link_hash_warning)
4324 /* When warning symbols are created, they **replace** the "real"
4325 entry in the hash table, thus we never get to see the real
4326 symbol in a hash traversal. So look at it now. */
4327 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4328
4329 htab = ppc_elf_hash_table (info);
4330 if (htab->elf.dynamic_sections_created)
4331 {
4332 struct plt_entry *ent;
4333 bfd_boolean doneone = FALSE;
4334 bfd_vma plt_offset = 0, glink_offset = 0;
4335
4336 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4337 if (ent->plt.refcount > 0)
4338 {
4339 /* Make sure this symbol is output as a dynamic symbol. */
4340 if (h->dynindx == -1
4341 && !h->forced_local)
4342 {
4343 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4344 return FALSE;
4345 }
4346
4347 if (info->shared
4348 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4349 {
4350 asection *s = htab->plt;
4351
4352 if (htab->plt_type == PLT_NEW)
4353 {
4354 if (!doneone)
4355 {
4356 plt_offset = s->size;
4357 s->size += 4;
4358 }
4359 ent->plt.offset = plt_offset;
4360
4361 s = htab->glink;
4362 if (!doneone || info->shared || info->pie)
4363 {
4364 glink_offset = s->size;
4365 s->size += GLINK_ENTRY_SIZE;
4366 }
4367 if (!doneone
4368 && !info->shared
4369 && !h->def_regular)
4370 {
4371 h->root.u.def.section = s;
4372 h->root.u.def.value = glink_offset;
4373 }
4374 ent->glink_offset = glink_offset;
4375
4376 if (htab->emit_stub_syms
4377 && !add_stub_sym (ent, h, info))
4378 return FALSE;
4379 }
4380 else
4381 {
4382 if (!doneone)
4383 {
4384 /* If this is the first .plt entry, make room
4385 for the special first entry. */
4386 if (s->size == 0)
4387 s->size += htab->plt_initial_entry_size;
4388
4389 /* The PowerPC PLT is actually composed of two
4390 parts, the first part is 2 words (for a load
4391 and a jump), and then there is a remaining
4392 word available at the end. */
4393 plt_offset = (htab->plt_initial_entry_size
4394 + (htab->plt_slot_size
4395 * ((s->size
4396 - htab->plt_initial_entry_size)
4397 / htab->plt_entry_size)));
4398
4399 /* If this symbol is not defined in a regular
4400 file, and we are not generating a shared
4401 library, then set the symbol to this location
4402 in the .plt. This is required to make
4403 function pointers compare as equal between
4404 the normal executable and the shared library. */
4405 if (! info->shared
4406 && !h->def_regular)
4407 {
4408 h->root.u.def.section = s;
4409 h->root.u.def.value = plt_offset;
4410 }
4411
4412 /* Make room for this entry. */
4413 s->size += htab->plt_entry_size;
4414 /* After the 8192nd entry, room for two entries
4415 is allocated. */
4416 if (htab->plt_type == PLT_OLD
4417 && (s->size - htab->plt_initial_entry_size)
4418 / htab->plt_entry_size
4419 > PLT_NUM_SINGLE_ENTRIES)
4420 s->size += htab->plt_entry_size;
4421 }
4422 ent->plt.offset = plt_offset;
4423 }
4424
4425 /* We also need to make an entry in the .rela.plt section. */
4426 if (!doneone)
4427 {
4428 htab->relplt->size += sizeof (Elf32_External_Rela);
4429
4430 if (htab->plt_type == PLT_VXWORKS)
4431 {
4432 /* Allocate space for the unloaded relocations. */
4433 if (!info->shared)
4434 {
4435 if (ent->plt.offset
4436 == (bfd_vma) htab->plt_initial_entry_size)
4437 {
4438 htab->srelplt2->size
4439 += sizeof (Elf32_External_Rela)
4440 * VXWORKS_PLTRESOLVE_RELOCS;
4441 }
4442
4443 htab->srelplt2->size
4444 += sizeof (Elf32_External_Rela)
4445 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4446 }
4447
4448 /* Every PLT entry has an associated GOT entry in
4449 .got.plt. */
4450 htab->sgotplt->size += 4;
4451 }
4452 doneone = TRUE;
4453 }
4454 }
4455 else
4456 ent->plt.offset = (bfd_vma) -1;
4457
4458 if (!doneone)
4459 {
4460 h->plt.plist = NULL;
4461 h->needs_plt = 0;
4462 }
4463 }
4464 }
4465 else
4466 {
4467 h->plt.plist = NULL;
4468 h->needs_plt = 0;
4469 }
4470
4471 eh = (struct ppc_elf_link_hash_entry *) h;
4472 if (eh->elf.got.refcount > 0)
4473 {
4474 /* Make sure this symbol is output as a dynamic symbol. */
4475 if (eh->elf.dynindx == -1
4476 && !eh->elf.forced_local)
4477 {
4478 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4479 return FALSE;
4480 }
4481
4482 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4483 && !eh->elf.def_dynamic)
4484 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4485 eh->elf.got.offset = (bfd_vma) -1;
4486 else
4487 {
4488 bfd_boolean dyn;
4489 unsigned int need = 0;
4490 if ((eh->tls_mask & TLS_TLS) != 0)
4491 {
4492 if ((eh->tls_mask & TLS_LD) != 0)
4493 need += 8;
4494 if ((eh->tls_mask & TLS_GD) != 0)
4495 need += 8;
4496 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4497 need += 4;
4498 if ((eh->tls_mask & TLS_DTPREL) != 0)
4499 need += 4;
4500 }
4501 else
4502 need += 4;
4503 eh->elf.got.offset = allocate_got (htab, need);
4504 dyn = htab->elf.dynamic_sections_created;
4505 if ((info->shared
4506 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4507 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4508 || eh->elf.root.type != bfd_link_hash_undefweak))
4509 {
4510 /* All the entries we allocated need relocs.
4511 Except LD only needs one. */
4512 if ((eh->tls_mask & TLS_LD) != 0)
4513 need -= 4;
4514 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4515 }
4516 }
4517 }
4518 else
4519 eh->elf.got.offset = (bfd_vma) -1;
4520
4521 if (eh->dyn_relocs == NULL)
4522 return TRUE;
4523
4524 /* In the shared -Bsymbolic case, discard space allocated for
4525 dynamic pc-relative relocs against symbols which turn out to be
4526 defined in regular objects. For the normal shared case, discard
4527 space for relocs that have become local due to symbol visibility
4528 changes. */
4529
4530 if (info->shared)
4531 {
4532 /* Relocs that use pc_count are those that appear on a call insn,
4533 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4534 generated via assembly. We want calls to protected symbols to
4535 resolve directly to the function rather than going via the plt.
4536 If people want function pointer comparisons to work as expected
4537 then they should avoid writing weird assembly. */
4538 if (SYMBOL_CALLS_LOCAL (info, h))
4539 {
4540 struct ppc_elf_dyn_relocs **pp;
4541
4542 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4543 {
4544 p->count -= p->pc_count;
4545 p->pc_count = 0;
4546 if (p->count == 0)
4547 *pp = p->next;
4548 else
4549 pp = &p->next;
4550 }
4551 }
4552
4553 /* Also discard relocs on undefined weak syms with non-default
4554 visibility. */
4555 if (eh->dyn_relocs != NULL
4556 && h->root.type == bfd_link_hash_undefweak)
4557 {
4558 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4559 eh->dyn_relocs = NULL;
4560
4561 /* Make sure undefined weak symbols are output as a dynamic
4562 symbol in PIEs. */
4563 else if (h->dynindx == -1
4564 && !h->forced_local)
4565 {
4566 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4567 return FALSE;
4568 }
4569 }
4570 }
4571 else if (ELIMINATE_COPY_RELOCS)
4572 {
4573 /* For the non-shared case, discard space for relocs against
4574 symbols which turn out to need copy relocs or are not
4575 dynamic. */
4576
4577 if (!h->non_got_ref
4578 && h->def_dynamic
4579 && !h->def_regular)
4580 {
4581 /* Make sure this symbol is output as a dynamic symbol.
4582 Undefined weak syms won't yet be marked as dynamic. */
4583 if (h->dynindx == -1
4584 && !h->forced_local)
4585 {
4586 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4587 return FALSE;
4588 }
4589
4590 /* If that succeeded, we know we'll be keeping all the
4591 relocs. */
4592 if (h->dynindx != -1)
4593 goto keep;
4594 }
4595
4596 eh->dyn_relocs = NULL;
4597
4598 keep: ;
4599 }
4600
4601 /* Finally, allocate space. */
4602 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4603 {
4604 asection *sreloc = elf_section_data (p->sec)->sreloc;
4605 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4606 }
4607
4608 return TRUE;
4609 }
4610
4611 /* Find any dynamic relocs that apply to read-only sections. */
4612
4613 static bfd_boolean
4614 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4615 {
4616 struct ppc_elf_dyn_relocs *p;
4617
4618 if (h->root.type == bfd_link_hash_indirect)
4619 return TRUE;
4620
4621 if (h->root.type == bfd_link_hash_warning)
4622 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4623
4624 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4625 {
4626 asection *s = p->sec->output_section;
4627
4628 if (s != NULL
4629 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4630 == (SEC_READONLY | SEC_ALLOC)))
4631 {
4632 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4633
4634 /* Not an error, just cut short the traversal. */
4635 return FALSE;
4636 }
4637 }
4638 return TRUE;
4639 }
4640
4641 /* Set the sizes of the dynamic sections. */
4642
4643 static bfd_boolean
4644 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4645 struct bfd_link_info *info)
4646 {
4647 struct ppc_elf_link_hash_table *htab;
4648 asection *s;
4649 bfd_boolean relocs;
4650 bfd *ibfd;
4651
4652 #ifdef DEBUG
4653 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4654 #endif
4655
4656 htab = ppc_elf_hash_table (info);
4657 BFD_ASSERT (htab->elf.dynobj != NULL);
4658
4659 if (elf_hash_table (info)->dynamic_sections_created)
4660 {
4661 /* Set the contents of the .interp section to the interpreter. */
4662 if (info->executable)
4663 {
4664 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4665 BFD_ASSERT (s != NULL);
4666 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4667 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4668 }
4669 }
4670
4671 if (htab->plt_type == PLT_OLD)
4672 htab->got_header_size = 16;
4673 else if (htab->plt_type == PLT_NEW)
4674 htab->got_header_size = 12;
4675
4676 /* Set up .got offsets for local syms, and space for local dynamic
4677 relocs. */
4678 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4679 {
4680 bfd_signed_vma *local_got;
4681 bfd_signed_vma *end_local_got;
4682 char *lgot_masks;
4683 bfd_size_type locsymcount;
4684 Elf_Internal_Shdr *symtab_hdr;
4685
4686 if (!is_ppc_elf_target (ibfd->xvec))
4687 continue;
4688
4689 for (s = ibfd->sections; s != NULL; s = s->next)
4690 {
4691 struct ppc_elf_dyn_relocs *p;
4692
4693 for (p = ((struct ppc_elf_dyn_relocs *)
4694 elf_section_data (s)->local_dynrel);
4695 p != NULL;
4696 p = p->next)
4697 {
4698 if (!bfd_is_abs_section (p->sec)
4699 && bfd_is_abs_section (p->sec->output_section))
4700 {
4701 /* Input section has been discarded, either because
4702 it is a copy of a linkonce section or due to
4703 linker script /DISCARD/, so we'll be discarding
4704 the relocs too. */
4705 }
4706 else if (p->count != 0)
4707 {
4708 elf_section_data (p->sec)->sreloc->size
4709 += p->count * sizeof (Elf32_External_Rela);
4710 if ((p->sec->output_section->flags
4711 & (SEC_READONLY | SEC_ALLOC))
4712 == (SEC_READONLY | SEC_ALLOC))
4713 info->flags |= DF_TEXTREL;
4714 }
4715 }
4716 }
4717
4718 local_got = elf_local_got_refcounts (ibfd);
4719 if (!local_got)
4720 continue;
4721
4722 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4723 locsymcount = symtab_hdr->sh_info;
4724 end_local_got = local_got + locsymcount;
4725 lgot_masks = (char *) end_local_got;
4726 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4727 if (*local_got > 0)
4728 {
4729 if (*lgot_masks == (TLS_TLS | TLS_LD))
4730 {
4731 /* If just an LD reloc, we'll just use
4732 htab->tlsld_got.offset. */
4733 htab->tlsld_got.refcount += 1;
4734 *local_got = (bfd_vma) -1;
4735 }
4736 else
4737 {
4738 unsigned int need = 0;
4739 if ((*lgot_masks & TLS_TLS) != 0)
4740 {
4741 if ((*lgot_masks & TLS_GD) != 0)
4742 need += 8;
4743 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4744 need += 4;
4745 if ((*lgot_masks & TLS_DTPREL) != 0)
4746 need += 4;
4747 }
4748 else
4749 need += 4;
4750 *local_got = allocate_got (htab, need);
4751 if (info->shared)
4752 htab->relgot->size += (need
4753 * (sizeof (Elf32_External_Rela) / 4));
4754 }
4755 }
4756 else
4757 *local_got = (bfd_vma) -1;
4758 }
4759
4760 if (htab->tlsld_got.refcount > 0)
4761 {
4762 htab->tlsld_got.offset = allocate_got (htab, 8);
4763 if (info->shared)
4764 htab->relgot->size += sizeof (Elf32_External_Rela);
4765 }
4766 else
4767 htab->tlsld_got.offset = (bfd_vma) -1;
4768
4769 /* Allocate space for global sym dynamic relocs. */
4770 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4771
4772 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4773 {
4774 unsigned int g_o_t = 32768;
4775
4776 /* If we haven't allocated the header, do so now. When we get here,
4777 for old plt/got the got size will be 0 to 32764 (not allocated),
4778 or 32780 to 65536 (header allocated). For new plt/got, the
4779 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4780 if (htab->got->size <= 32768)
4781 {
4782 g_o_t = htab->got->size;
4783 if (htab->plt_type == PLT_OLD)
4784 g_o_t += 4;
4785 htab->got->size += htab->got_header_size;
4786 }
4787
4788 htab->elf.hgot->root.u.def.value = g_o_t;
4789 }
4790
4791 if (htab->glink != NULL && htab->glink->size != 0)
4792 {
4793 htab->glink_pltresolve = htab->glink->size;
4794 /* Space for the branch table. */
4795 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4796 /* Pad out to align the start of PLTresolve. */
4797 htab->glink->size += -htab->glink->size & 15;
4798 htab->glink->size += GLINK_PLTRESOLVE;
4799
4800 if (htab->emit_stub_syms)
4801 {
4802 struct elf_link_hash_entry *sh;
4803 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4804 TRUE, FALSE, FALSE);
4805 if (sh == NULL)
4806 return FALSE;
4807 if (sh->root.type == bfd_link_hash_new)
4808 {
4809 sh->root.type = bfd_link_hash_defined;
4810 sh->root.u.def.section = htab->glink;
4811 sh->root.u.def.value = htab->glink_pltresolve;
4812 sh->ref_regular = 1;
4813 sh->def_regular = 1;
4814 sh->ref_regular_nonweak = 1;
4815 sh->forced_local = 1;
4816 sh->non_elf = 0;
4817 }
4818 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4819 TRUE, FALSE, FALSE);
4820 if (sh == NULL)
4821 return FALSE;
4822 if (sh->root.type == bfd_link_hash_new)
4823 {
4824 sh->root.type = bfd_link_hash_defined;
4825 sh->root.u.def.section = htab->glink;
4826 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4827 sh->ref_regular = 1;
4828 sh->def_regular = 1;
4829 sh->ref_regular_nonweak = 1;
4830 sh->forced_local = 1;
4831 sh->non_elf = 0;
4832 }
4833 }
4834 }
4835
4836 /* We've now determined the sizes of the various dynamic sections.
4837 Allocate memory for them. */
4838 relocs = FALSE;
4839 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4840 {
4841 bfd_boolean strip_section = TRUE;
4842
4843 if ((s->flags & SEC_LINKER_CREATED) == 0)
4844 continue;
4845
4846 if (s == htab->plt
4847 || s == htab->glink
4848 || s == htab->got
4849 || s == htab->sgotplt
4850 || s == htab->sbss
4851 || s == htab->dynbss
4852 || s == htab->dynsbss)
4853 {
4854 /* We'd like to strip these sections if they aren't needed, but if
4855 we've exported dynamic symbols from them we must leave them.
4856 It's too late to tell BFD to get rid of the symbols. */
4857 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4858 strip_section = FALSE;
4859 /* Strip this section if we don't need it; see the
4860 comment below. */
4861 }
4862 else if (s == htab->sdata[0].section
4863 || s == htab->sdata[1].section)
4864 {
4865 /* Strip these too. */
4866 }
4867 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4868 {
4869 if (s->size != 0)
4870 {
4871 /* Remember whether there are any relocation sections. */
4872 relocs = TRUE;
4873
4874 /* We use the reloc_count field as a counter if we need
4875 to copy relocs into the output file. */
4876 s->reloc_count = 0;
4877 }
4878 }
4879 else
4880 {
4881 /* It's not one of our sections, so don't allocate space. */
4882 continue;
4883 }
4884
4885 if (s->size == 0 && strip_section)
4886 {
4887 /* If we don't need this section, strip it from the
4888 output file. This is mostly to handle .rela.bss and
4889 .rela.plt. We must create both sections in
4890 create_dynamic_sections, because they must be created
4891 before the linker maps input sections to output
4892 sections. The linker does that before
4893 adjust_dynamic_symbol is called, and it is that
4894 function which decides whether anything needs to go
4895 into these sections. */
4896 s->flags |= SEC_EXCLUDE;
4897 continue;
4898 }
4899
4900 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4901 continue;
4902
4903 /* Allocate memory for the section contents. */
4904 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4905 if (s->contents == NULL)
4906 return FALSE;
4907 }
4908
4909 if (htab->elf.dynamic_sections_created)
4910 {
4911 /* Add some entries to the .dynamic section. We fill in the
4912 values later, in ppc_elf_finish_dynamic_sections, but we
4913 must add the entries now so that we get the correct size for
4914 the .dynamic section. The DT_DEBUG entry is filled in by the
4915 dynamic linker and used by the debugger. */
4916 #define add_dynamic_entry(TAG, VAL) \
4917 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4918
4919 if (info->executable)
4920 {
4921 if (!add_dynamic_entry (DT_DEBUG, 0))
4922 return FALSE;
4923 }
4924
4925 if (htab->plt != NULL && htab->plt->size != 0)
4926 {
4927 if (!add_dynamic_entry (DT_PLTGOT, 0)
4928 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4929 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4930 || !add_dynamic_entry (DT_JMPREL, 0))
4931 return FALSE;
4932 }
4933
4934 if (htab->glink != NULL && htab->glink->size != 0)
4935 {
4936 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4937 return FALSE;
4938 }
4939
4940 if (relocs)
4941 {
4942 if (!add_dynamic_entry (DT_RELA, 0)
4943 || !add_dynamic_entry (DT_RELASZ, 0)
4944 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4945 return FALSE;
4946 }
4947
4948 /* If any dynamic relocs apply to a read-only section, then we
4949 need a DT_TEXTREL entry. */
4950 if ((info->flags & DF_TEXTREL) == 0)
4951 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4952 info);
4953
4954 if ((info->flags & DF_TEXTREL) != 0)
4955 {
4956 if (!add_dynamic_entry (DT_TEXTREL, 0))
4957 return FALSE;
4958 }
4959 }
4960 #undef add_dynamic_entry
4961
4962 return TRUE;
4963 }
4964 \f
4965 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4966
4967 static const int shared_stub_entry[] =
4968 {
4969 0x7c0802a6, /* mflr 0 */
4970 0x429f0005, /* bcl 20, 31, .Lxxx */
4971 0x7d6802a6, /* mflr 11 */
4972 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4973 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4974 0x7c0803a6, /* mtlr 0 */
4975 0x7d6903a6, /* mtctr 11 */
4976 0x4e800420, /* bctr */
4977 };
4978
4979 static const int stub_entry[] =
4980 {
4981 0x3d600000, /* lis 11,xxx@ha */
4982 0x396b0000, /* addi 11,11,xxx@l */
4983 0x7d6903a6, /* mtctr 11 */
4984 0x4e800420, /* bctr */
4985 };
4986
4987 static bfd_boolean
4988 ppc_elf_relax_section (bfd *abfd,
4989 asection *isec,
4990 struct bfd_link_info *link_info,
4991 bfd_boolean *again)
4992 {
4993 struct one_fixup
4994 {
4995 struct one_fixup *next;
4996 asection *tsec;
4997 bfd_vma toff;
4998 bfd_vma trampoff;
4999 };
5000
5001 Elf_Internal_Shdr *symtab_hdr;
5002 bfd_byte *contents = NULL;
5003 Elf_Internal_Sym *isymbuf = NULL;
5004 Elf_Internal_Rela *internal_relocs = NULL;
5005 Elf_Internal_Rela *irel, *irelend;
5006 struct one_fixup *fixups = NULL;
5007 bfd_boolean changed;
5008 struct ppc_elf_link_hash_table *htab;
5009 bfd_size_type trampoff;
5010 asection *got2;
5011
5012 *again = FALSE;
5013
5014 /* Nothing to do if there are no relocations, and no need to do
5015 anything with non-alloc sections. */
5016 if ((isec->flags & SEC_ALLOC) == 0
5017 || (isec->flags & SEC_RELOC) == 0
5018 || isec->reloc_count == 0)
5019 return TRUE;
5020
5021 trampoff = (isec->size + 3) & (bfd_vma) -4;
5022 /* Space for a branch around any trampolines. */
5023 trampoff += 4;
5024
5025 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5026
5027 /* Get a copy of the native relocations. */
5028 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5029 link_info->keep_memory);
5030 if (internal_relocs == NULL)
5031 goto error_return;
5032
5033 htab = ppc_elf_hash_table (link_info);
5034 got2 = bfd_get_section_by_name (abfd, ".got2");
5035
5036 irelend = internal_relocs + isec->reloc_count;
5037 for (irel = internal_relocs; irel < irelend; irel++)
5038 {
5039 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5040 bfd_vma symaddr, reladdr, toff, roff;
5041 asection *tsec;
5042 struct one_fixup *f;
5043 size_t insn_offset = 0;
5044 bfd_vma max_branch_offset, val;
5045 bfd_byte *hit_addr;
5046 unsigned long t0;
5047 unsigned char sym_type;
5048
5049 switch (r_type)
5050 {
5051 case R_PPC_REL24:
5052 case R_PPC_LOCAL24PC:
5053 case R_PPC_PLTREL24:
5054 max_branch_offset = 1 << 25;
5055 break;
5056
5057 case R_PPC_REL14:
5058 case R_PPC_REL14_BRTAKEN:
5059 case R_PPC_REL14_BRNTAKEN:
5060 max_branch_offset = 1 << 15;
5061 break;
5062
5063 default:
5064 continue;
5065 }
5066
5067 /* Get the value of the symbol referred to by the reloc. */
5068 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5069 {
5070 /* A local symbol. */
5071 Elf_Internal_Sym *isym;
5072
5073 /* Read this BFD's local symbols. */
5074 if (isymbuf == NULL)
5075 {
5076 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5077 if (isymbuf == NULL)
5078 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5079 symtab_hdr->sh_info, 0,
5080 NULL, NULL, NULL);
5081 if (isymbuf == 0)
5082 goto error_return;
5083 }
5084 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5085 if (isym->st_shndx == SHN_UNDEF)
5086 continue; /* We can't do anything with undefined symbols. */
5087 else if (isym->st_shndx == SHN_ABS)
5088 tsec = bfd_abs_section_ptr;
5089 else if (isym->st_shndx == SHN_COMMON)
5090 tsec = bfd_com_section_ptr;
5091 else
5092 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5093
5094 toff = isym->st_value;
5095 sym_type = ELF_ST_TYPE (isym->st_info);
5096 }
5097 else
5098 {
5099 /* Global symbol handling. */
5100 unsigned long indx;
5101 struct elf_link_hash_entry *h;
5102
5103 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5104 h = elf_sym_hashes (abfd)[indx];
5105
5106 while (h->root.type == bfd_link_hash_indirect
5107 || h->root.type == bfd_link_hash_warning)
5108 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5109
5110 tsec = NULL;
5111 toff = 0;
5112 if (r_type == R_PPC_PLTREL24
5113 && htab->plt != NULL)
5114 {
5115 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5116
5117 if (ent != NULL)
5118 {
5119 if (htab->plt_type == PLT_NEW)
5120 {
5121 tsec = htab->glink;
5122 toff = ent->glink_offset;
5123 }
5124 else
5125 {
5126 tsec = htab->plt;
5127 toff = ent->plt.offset;
5128 }
5129 }
5130 }
5131 if (tsec != NULL)
5132 ;
5133 else if (h->root.type == bfd_link_hash_defined
5134 || h->root.type == bfd_link_hash_defweak)
5135 {
5136 tsec = h->root.u.def.section;
5137 toff = h->root.u.def.value;
5138 }
5139 else
5140 continue;
5141
5142 sym_type = h->type;
5143 }
5144
5145 /* If the branch and target are in the same section, you have
5146 no hope of adding stubs. We'll error out later should the
5147 branch overflow. */
5148 if (tsec == isec)
5149 continue;
5150
5151 /* There probably isn't any reason to handle symbols in
5152 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5153 attribute for a code section, and we are only looking at
5154 branches. However, implement it correctly here as a
5155 reference for other target relax_section functions. */
5156 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5157 {
5158 /* At this stage in linking, no SEC_MERGE symbol has been
5159 adjusted, so all references to such symbols need to be
5160 passed through _bfd_merged_section_offset. (Later, in
5161 relocate_section, all SEC_MERGE symbols *except* for
5162 section symbols have been adjusted.)
5163
5164 gas may reduce relocations against symbols in SEC_MERGE
5165 sections to a relocation against the section symbol when
5166 the original addend was zero. When the reloc is against
5167 a section symbol we should include the addend in the
5168 offset passed to _bfd_merged_section_offset, since the
5169 location of interest is the original symbol. On the
5170 other hand, an access to "sym+addend" where "sym" is not
5171 a section symbol should not include the addend; Such an
5172 access is presumed to be an offset from "sym"; The
5173 location of interest is just "sym". */
5174 if (sym_type == STT_SECTION)
5175 toff += irel->r_addend;
5176
5177 toff = _bfd_merged_section_offset (abfd, &tsec,
5178 elf_section_data (tsec)->sec_info,
5179 toff);
5180
5181 if (sym_type != STT_SECTION)
5182 toff += irel->r_addend;
5183 }
5184 /* PLTREL24 addends are special. */
5185 else if (r_type != R_PPC_PLTREL24)
5186 toff += irel->r_addend;
5187
5188 /* Attempted -shared link of non-pic code loses. */
5189 if (tsec->output_section == NULL)
5190 continue;
5191
5192 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5193
5194 roff = irel->r_offset;
5195 reladdr = isec->output_section->vma + isec->output_offset + roff;
5196
5197 /* If the branch is in range, no need to do anything. */
5198 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5199 continue;
5200
5201 /* Look for an existing fixup to this address. */
5202 for (f = fixups; f ; f = f->next)
5203 if (f->tsec == tsec && f->toff == toff)
5204 break;
5205
5206 if (f == NULL)
5207 {
5208 size_t size;
5209 unsigned long stub_rtype;
5210
5211 val = trampoff - roff;
5212 if (val >= max_branch_offset)
5213 /* Oh dear, we can't reach a trampoline. Don't try to add
5214 one. We'll report an error later. */
5215 continue;
5216
5217 if (link_info->shared)
5218 {
5219 size = 4 * ARRAY_SIZE (shared_stub_entry);
5220 insn_offset = 12;
5221 stub_rtype = R_PPC_RELAX32PC;
5222 }
5223 else
5224 {
5225 size = 4 * ARRAY_SIZE (stub_entry);
5226 insn_offset = 0;
5227 stub_rtype = R_PPC_RELAX32;
5228 }
5229
5230 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5231 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5232 abort ();
5233 if (tsec == htab->plt
5234 || tsec == htab->glink)
5235 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5236
5237 /* Hijack the old relocation. Since we need two
5238 relocations for this use a "composite" reloc. */
5239 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5240 stub_rtype);
5241 irel->r_offset = trampoff + insn_offset;
5242
5243 /* Record the fixup so we don't do it again this section. */
5244 f = bfd_malloc (sizeof (*f));
5245 f->next = fixups;
5246 f->tsec = tsec;
5247 f->toff = toff;
5248 f->trampoff = trampoff;
5249 fixups = f;
5250
5251 trampoff += size;
5252 }
5253 else
5254 {
5255 val = f->trampoff - roff;
5256 if (val >= max_branch_offset)
5257 continue;
5258
5259 /* Nop out the reloc, since we're finalizing things here. */
5260 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5261 }
5262
5263 /* Get the section contents. */
5264 if (contents == NULL)
5265 {
5266 /* Get cached copy if it exists. */
5267 if (elf_section_data (isec)->this_hdr.contents != NULL)
5268 contents = elf_section_data (isec)->this_hdr.contents;
5269 else
5270 {
5271 /* Go get them off disk. */
5272 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5273 goto error_return;
5274 }
5275 }
5276
5277 /* Fix up the existing branch to hit the trampoline. */
5278 hit_addr = contents + roff;
5279 switch (r_type)
5280 {
5281 case R_PPC_REL24:
5282 case R_PPC_LOCAL24PC:
5283 case R_PPC_PLTREL24:
5284 t0 = bfd_get_32 (abfd, hit_addr);
5285 t0 &= ~0x3fffffc;
5286 t0 |= val & 0x3fffffc;
5287 bfd_put_32 (abfd, t0, hit_addr);
5288 break;
5289
5290 case R_PPC_REL14:
5291 case R_PPC_REL14_BRTAKEN:
5292 case R_PPC_REL14_BRNTAKEN:
5293 t0 = bfd_get_32 (abfd, hit_addr);
5294 t0 &= ~0xfffc;
5295 t0 |= val & 0xfffc;
5296 bfd_put_32 (abfd, t0, hit_addr);
5297 break;
5298 }
5299 }
5300
5301 /* Write out the trampolines. */
5302 changed = fixups != NULL;
5303 if (fixups != NULL)
5304 {
5305 const int *stub;
5306 bfd_byte *dest;
5307 bfd_vma val;
5308 int i, size;
5309
5310 do
5311 {
5312 struct one_fixup *f = fixups;
5313 fixups = fixups->next;
5314 free (f);
5315 }
5316 while (fixups);
5317
5318 contents = bfd_realloc (contents, trampoff);
5319 if (contents == NULL)
5320 goto error_return;
5321
5322 isec->size = (isec->size + 3) & (bfd_vma) -4;
5323 /* Branch around the trampolines. */
5324 val = trampoff - isec->size + 0x48000000;
5325 dest = contents + isec->size;
5326 isec->size = trampoff;
5327 bfd_put_32 (abfd, val, dest);
5328 dest += 4;
5329
5330 if (link_info->shared)
5331 {
5332 stub = shared_stub_entry;
5333 size = ARRAY_SIZE (shared_stub_entry);
5334 }
5335 else
5336 {
5337 stub = stub_entry;
5338 size = ARRAY_SIZE (stub_entry);
5339 }
5340
5341 i = 0;
5342 while (dest < contents + trampoff)
5343 {
5344 bfd_put_32 (abfd, stub[i], dest);
5345 i++;
5346 if (i == size)
5347 i = 0;
5348 dest += 4;
5349 }
5350 BFD_ASSERT (i == 0);
5351 }
5352
5353 if (isymbuf != NULL
5354 && symtab_hdr->contents != (unsigned char *) isymbuf)
5355 {
5356 if (! link_info->keep_memory)
5357 free (isymbuf);
5358 else
5359 {
5360 /* Cache the symbols for elf_link_input_bfd. */
5361 symtab_hdr->contents = (unsigned char *) isymbuf;
5362 }
5363 }
5364
5365 if (contents != NULL
5366 && elf_section_data (isec)->this_hdr.contents != contents)
5367 {
5368 if (!changed && !link_info->keep_memory)
5369 free (contents);
5370 else
5371 {
5372 /* Cache the section contents for elf_link_input_bfd. */
5373 elf_section_data (isec)->this_hdr.contents = contents;
5374 }
5375 }
5376
5377 if (elf_section_data (isec)->relocs != internal_relocs)
5378 {
5379 if (!changed)
5380 free (internal_relocs);
5381 else
5382 elf_section_data (isec)->relocs = internal_relocs;
5383 }
5384
5385 *again = changed;
5386 return TRUE;
5387
5388 error_return:
5389 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5390 free (isymbuf);
5391 if (contents != NULL
5392 && elf_section_data (isec)->this_hdr.contents != contents)
5393 free (contents);
5394 if (internal_relocs != NULL
5395 && elf_section_data (isec)->relocs != internal_relocs)
5396 free (internal_relocs);
5397 return FALSE;
5398 }
5399 \f
5400 /* What to do when ld finds relocations against symbols defined in
5401 discarded sections. */
5402
5403 static unsigned int
5404 ppc_elf_action_discarded (asection *sec)
5405 {
5406 if (strcmp (".fixup", sec->name) == 0)
5407 return 0;
5408
5409 if (strcmp (".got2", sec->name) == 0)
5410 return 0;
5411
5412 return _bfd_elf_default_action_discarded (sec);
5413 }
5414 \f
5415 /* Fill in the address for a pointer generated in a linker section. */
5416
5417 static bfd_vma
5418 elf_finish_pointer_linker_section (bfd *input_bfd,
5419 elf_linker_section_t *lsect,
5420 struct elf_link_hash_entry *h,
5421 bfd_vma relocation,
5422 const Elf_Internal_Rela *rel)
5423 {
5424 elf_linker_section_pointers_t *linker_section_ptr;
5425
5426 BFD_ASSERT (lsect != NULL);
5427
5428 if (h != NULL)
5429 {
5430 /* Handle global symbol. */
5431 struct ppc_elf_link_hash_entry *eh;
5432
5433 eh = (struct ppc_elf_link_hash_entry *) h;
5434 BFD_ASSERT (eh->elf.def_regular);
5435 linker_section_ptr = eh->linker_section_pointer;
5436 }
5437 else
5438 {
5439 /* Handle local symbol. */
5440 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5441
5442 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5443 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5444 }
5445
5446 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5447 rel->r_addend,
5448 lsect);
5449 BFD_ASSERT (linker_section_ptr != NULL);
5450
5451 /* Offset will always be a multiple of four, so use the bottom bit
5452 as a "written" flag. */
5453 if ((linker_section_ptr->offset & 1) == 0)
5454 {
5455 bfd_put_32 (lsect->section->owner,
5456 relocation + linker_section_ptr->addend,
5457 lsect->section->contents + linker_section_ptr->offset);
5458 linker_section_ptr->offset += 1;
5459 }
5460
5461 relocation = (lsect->section->output_offset
5462 + linker_section_ptr->offset - 1
5463 - 0x8000);
5464
5465 #ifdef DEBUG
5466 fprintf (stderr,
5467 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5468 lsect->name, (long) relocation, (long) relocation);
5469 #endif
5470
5471 /* Subtract out the addend, because it will get added back in by the normal
5472 processing. */
5473 return relocation - linker_section_ptr->addend;
5474 }
5475
5476 /* The RELOCATE_SECTION function is called by the ELF backend linker
5477 to handle the relocations for a section.
5478
5479 The relocs are always passed as Rela structures; if the section
5480 actually uses Rel structures, the r_addend field will always be
5481 zero.
5482
5483 This function is responsible for adjust the section contents as
5484 necessary, and (if using Rela relocs and generating a
5485 relocatable output file) adjusting the reloc addend as
5486 necessary.
5487
5488 This function does not have to worry about setting the reloc
5489 address or the reloc symbol index.
5490
5491 LOCAL_SYMS is a pointer to the swapped in local symbols.
5492
5493 LOCAL_SECTIONS is an array giving the section in the input file
5494 corresponding to the st_shndx field of each local symbol.
5495
5496 The global hash table entry for the global symbols can be found
5497 via elf_sym_hashes (input_bfd).
5498
5499 When generating relocatable output, this function must handle
5500 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5501 going to be the section symbol corresponding to the output
5502 section, which means that the addend must be adjusted
5503 accordingly. */
5504
5505 static bfd_boolean
5506 ppc_elf_relocate_section (bfd *output_bfd,
5507 struct bfd_link_info *info,
5508 bfd *input_bfd,
5509 asection *input_section,
5510 bfd_byte *contents,
5511 Elf_Internal_Rela *relocs,
5512 Elf_Internal_Sym *local_syms,
5513 asection **local_sections)
5514 {
5515 Elf_Internal_Shdr *symtab_hdr;
5516 struct elf_link_hash_entry **sym_hashes;
5517 struct ppc_elf_link_hash_table *htab;
5518 Elf_Internal_Rela *rel;
5519 Elf_Internal_Rela *relend;
5520 Elf_Internal_Rela outrel;
5521 bfd_byte *loc;
5522 asection *got2, *sreloc = NULL;
5523 bfd_vma *local_got_offsets;
5524 bfd_boolean ret = TRUE;
5525
5526 #ifdef DEBUG
5527 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5528 "%ld relocations%s",
5529 input_bfd, input_section,
5530 (long) input_section->reloc_count,
5531 (info->relocatable) ? " (relocatable)" : "");
5532 #endif
5533
5534 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5535
5536 if (info->relocatable)
5537 {
5538 if (got2 == NULL)
5539 return TRUE;
5540
5541 rel = relocs;
5542 relend = relocs + input_section->reloc_count;
5543 for (; rel < relend; rel++)
5544 {
5545 enum elf_ppc_reloc_type r_type;
5546
5547 r_type = ELF32_R_TYPE (rel->r_info);
5548 if (r_type == R_PPC_PLTREL24
5549 && rel->r_addend >= 32768)
5550 {
5551 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5552 addend specifies the GOT pointer offset within .got2. */
5553 rel->r_addend += got2->output_offset;
5554 }
5555 }
5556 return TRUE;
5557 }
5558
5559 /* Initialize howto table if not already done. */
5560 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5561 ppc_elf_howto_init ();
5562
5563 htab = ppc_elf_hash_table (info);
5564 local_got_offsets = elf_local_got_offsets (input_bfd);
5565 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5566 sym_hashes = elf_sym_hashes (input_bfd);
5567 rel = relocs;
5568 relend = relocs + input_section->reloc_count;
5569 for (; rel < relend; rel++)
5570 {
5571 enum elf_ppc_reloc_type r_type;
5572 bfd_vma addend;
5573 bfd_reloc_status_type r;
5574 Elf_Internal_Sym *sym;
5575 asection *sec;
5576 struct elf_link_hash_entry *h;
5577 const char *sym_name;
5578 reloc_howto_type *howto;
5579 unsigned long r_symndx;
5580 bfd_vma relocation;
5581 bfd_vma branch_bit, insn, from;
5582 bfd_boolean unresolved_reloc;
5583 bfd_boolean warned;
5584 unsigned int tls_type, tls_mask, tls_gd;
5585
5586 r_type = ELF32_R_TYPE (rel->r_info);
5587 sym = NULL;
5588 sec = NULL;
5589 h = NULL;
5590 unresolved_reloc = FALSE;
5591 warned = FALSE;
5592 r_symndx = ELF32_R_SYM (rel->r_info);
5593
5594 if (r_symndx < symtab_hdr->sh_info)
5595 {
5596 sym = local_syms + r_symndx;
5597 sec = local_sections[r_symndx];
5598 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5599
5600 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5601 }
5602 else
5603 {
5604 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5605 r_symndx, symtab_hdr, sym_hashes,
5606 h, sec, relocation,
5607 unresolved_reloc, warned);
5608
5609 sym_name = h->root.root.string;
5610 }
5611
5612 /* TLS optimizations. Replace instruction sequences and relocs
5613 based on information we collected in tls_optimize. We edit
5614 RELOCS so that --emit-relocs will output something sensible
5615 for the final instruction stream. */
5616 tls_mask = 0;
5617 tls_gd = 0;
5618 if (IS_PPC_TLS_RELOC (r_type))
5619 {
5620 if (h != NULL)
5621 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5622 else if (local_got_offsets != NULL)
5623 {
5624 char *lgot_masks;
5625 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5626 tls_mask = lgot_masks[r_symndx];
5627 }
5628 }
5629
5630 /* Ensure reloc mapping code below stays sane. */
5631 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5632 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5633 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5634 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5635 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5636 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5637 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5638 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5639 abort ();
5640 switch (r_type)
5641 {
5642 default:
5643 break;
5644
5645 case R_PPC_GOT_TPREL16:
5646 case R_PPC_GOT_TPREL16_LO:
5647 if (tls_mask != 0
5648 && (tls_mask & TLS_TPREL) == 0)
5649 {
5650 bfd_vma insn;
5651 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5652 insn &= 31 << 21;
5653 insn |= 0x3c020000; /* addis 0,2,0 */
5654 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5655 r_type = R_PPC_TPREL16_HA;
5656 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5657 }
5658 break;
5659
5660 case R_PPC_TLS:
5661 if (tls_mask != 0
5662 && (tls_mask & TLS_TPREL) == 0)
5663 {
5664 bfd_vma insn, rtra;
5665 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5666 if ((insn & ((31 << 26) | (31 << 11)))
5667 == ((31 << 26) | (2 << 11)))
5668 rtra = insn & ((1 << 26) - (1 << 16));
5669 else if ((insn & ((31 << 26) | (31 << 16)))
5670 == ((31 << 26) | (2 << 16)))
5671 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5672 else
5673 abort ();
5674 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5675 /* add -> addi. */
5676 insn = 14 << 26;
5677 else if ((insn & (31 << 1)) == 23 << 1
5678 && ((insn & (31 << 6)) < 14 << 6
5679 || ((insn & (31 << 6)) >= 16 << 6
5680 && (insn & (31 << 6)) < 24 << 6)))
5681 /* load and store indexed -> dform. */
5682 insn = (32 | ((insn >> 6) & 31)) << 26;
5683 else if ((insn & (31 << 1)) == 21 << 1
5684 && (insn & (0x1a << 6)) == 0)
5685 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5686 insn = (((58 | ((insn >> 6) & 4)) << 26)
5687 | ((insn >> 6) & 1));
5688 else if ((insn & (31 << 1)) == 21 << 1
5689 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5690 /* lwax -> lwa. */
5691 insn = (58 << 26) | 2;
5692 else
5693 abort ();
5694 insn |= rtra;
5695 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5696 r_type = R_PPC_TPREL16_LO;
5697 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5698 /* Was PPC_TLS which sits on insn boundary, now
5699 PPC_TPREL16_LO which is at insn+2. */
5700 rel->r_offset += 2;
5701 }
5702 break;
5703
5704 case R_PPC_GOT_TLSGD16_HI:
5705 case R_PPC_GOT_TLSGD16_HA:
5706 tls_gd = TLS_TPRELGD;
5707 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5708 goto tls_gdld_hi;
5709 break;
5710
5711 case R_PPC_GOT_TLSLD16_HI:
5712 case R_PPC_GOT_TLSLD16_HA:
5713 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5714 {
5715 tls_gdld_hi:
5716 if ((tls_mask & tls_gd) != 0)
5717 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5718 + R_PPC_GOT_TPREL16);
5719 else
5720 {
5721 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5722 rel->r_offset -= 2;
5723 r_type = R_PPC_NONE;
5724 }
5725 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5726 }
5727 break;
5728
5729 case R_PPC_GOT_TLSGD16:
5730 case R_PPC_GOT_TLSGD16_LO:
5731 tls_gd = TLS_TPRELGD;
5732 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5733 goto tls_get_addr_check;
5734 break;
5735
5736 case R_PPC_GOT_TLSLD16:
5737 case R_PPC_GOT_TLSLD16_LO:
5738 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5739 {
5740 tls_get_addr_check:
5741 if (rel + 1 < relend)
5742 {
5743 enum elf_ppc_reloc_type r_type2;
5744 unsigned long r_symndx2;
5745 struct elf_link_hash_entry *h2;
5746 bfd_vma insn1, insn2;
5747 bfd_vma offset;
5748
5749 /* The next instruction should be a call to
5750 __tls_get_addr. Peek at the reloc to be sure. */
5751 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5752 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5753 if (r_symndx2 < symtab_hdr->sh_info
5754 || (r_type2 != R_PPC_REL14
5755 && r_type2 != R_PPC_REL14_BRTAKEN
5756 && r_type2 != R_PPC_REL14_BRNTAKEN
5757 && r_type2 != R_PPC_REL24
5758 && r_type2 != R_PPC_PLTREL24))
5759 break;
5760
5761 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5762 while (h2->root.type == bfd_link_hash_indirect
5763 || h2->root.type == bfd_link_hash_warning)
5764 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5765 if (h2 == NULL || h2 != htab->tls_get_addr)
5766 break;
5767
5768 /* OK, it checks out. Replace the call. */
5769 offset = rel[1].r_offset;
5770 insn1 = bfd_get_32 (output_bfd,
5771 contents + rel->r_offset - 2);
5772 if ((tls_mask & tls_gd) != 0)
5773 {
5774 /* IE */
5775 insn1 &= (1 << 26) - 1;
5776 insn1 |= 32 << 26; /* lwz */
5777 insn2 = 0x7c631214; /* add 3,3,2 */
5778 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5779 rel[1].r_addend = 0;
5780 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5781 + R_PPC_GOT_TPREL16);
5782 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5783 }
5784 else
5785 {
5786 /* LE */
5787 insn1 = 0x3c620000; /* addis 3,2,0 */
5788 insn2 = 0x38630000; /* addi 3,3,0 */
5789 if (tls_gd == 0)
5790 {
5791 /* Was an LD reloc. */
5792 r_symndx = 0;
5793 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5794 }
5795 r_type = R_PPC_TPREL16_HA;
5796 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5797 rel[1].r_info = ELF32_R_INFO (r_symndx,
5798 R_PPC_TPREL16_LO);
5799 rel[1].r_offset += 2;
5800 rel[1].r_addend = rel->r_addend;
5801 }
5802 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5803 bfd_put_32 (output_bfd, insn2, contents + offset);
5804 if (tls_gd == 0)
5805 {
5806 /* We changed the symbol on an LD reloc. Start over
5807 in order to get h, sym, sec etc. right. */
5808 rel--;
5809 continue;
5810 }
5811 }
5812 }
5813 break;
5814 }
5815
5816 /* Handle other relocations that tweak non-addend part of insn. */
5817 branch_bit = 0;
5818 switch (r_type)
5819 {
5820 default:
5821 break;
5822
5823 /* Branch taken prediction relocations. */
5824 case R_PPC_ADDR14_BRTAKEN:
5825 case R_PPC_REL14_BRTAKEN:
5826 branch_bit = BRANCH_PREDICT_BIT;
5827 /* Fall thru */
5828
5829 /* Branch not taken prediction relocations. */
5830 case R_PPC_ADDR14_BRNTAKEN:
5831 case R_PPC_REL14_BRNTAKEN:
5832 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5833 insn &= ~BRANCH_PREDICT_BIT;
5834 insn |= branch_bit;
5835
5836 from = (rel->r_offset
5837 + input_section->output_offset
5838 + input_section->output_section->vma);
5839
5840 /* Invert 'y' bit if not the default. */
5841 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5842 insn ^= BRANCH_PREDICT_BIT;
5843
5844 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5845 break;
5846 }
5847
5848 addend = rel->r_addend;
5849 tls_type = 0;
5850 howto = NULL;
5851 if (r_type < R_PPC_max)
5852 howto = ppc_elf_howto_table[r_type];
5853 switch (r_type)
5854 {
5855 default:
5856 (*_bfd_error_handler)
5857 (_("%B: unknown relocation type %d for symbol %s"),
5858 input_bfd, (int) r_type, sym_name);
5859
5860 bfd_set_error (bfd_error_bad_value);
5861 ret = FALSE;
5862 continue;
5863
5864 case R_PPC_NONE:
5865 case R_PPC_TLS:
5866 case R_PPC_EMB_MRKREF:
5867 case R_PPC_GNU_VTINHERIT:
5868 case R_PPC_GNU_VTENTRY:
5869 continue;
5870
5871 /* GOT16 relocations. Like an ADDR16 using the symbol's
5872 address in the GOT as relocation value instead of the
5873 symbol's value itself. Also, create a GOT entry for the
5874 symbol and put the symbol value there. */
5875 case R_PPC_GOT_TLSGD16:
5876 case R_PPC_GOT_TLSGD16_LO:
5877 case R_PPC_GOT_TLSGD16_HI:
5878 case R_PPC_GOT_TLSGD16_HA:
5879 tls_type = TLS_TLS | TLS_GD;
5880 goto dogot;
5881
5882 case R_PPC_GOT_TLSLD16:
5883 case R_PPC_GOT_TLSLD16_LO:
5884 case R_PPC_GOT_TLSLD16_HI:
5885 case R_PPC_GOT_TLSLD16_HA:
5886 tls_type = TLS_TLS | TLS_LD;
5887 goto dogot;
5888
5889 case R_PPC_GOT_TPREL16:
5890 case R_PPC_GOT_TPREL16_LO:
5891 case R_PPC_GOT_TPREL16_HI:
5892 case R_PPC_GOT_TPREL16_HA:
5893 tls_type = TLS_TLS | TLS_TPREL;
5894 goto dogot;
5895
5896 case R_PPC_GOT_DTPREL16:
5897 case R_PPC_GOT_DTPREL16_LO:
5898 case R_PPC_GOT_DTPREL16_HI:
5899 case R_PPC_GOT_DTPREL16_HA:
5900 tls_type = TLS_TLS | TLS_DTPREL;
5901 goto dogot;
5902
5903 case R_PPC_GOT16:
5904 case R_PPC_GOT16_LO:
5905 case R_PPC_GOT16_HI:
5906 case R_PPC_GOT16_HA:
5907 dogot:
5908 {
5909 /* Relocation is to the entry for this symbol in the global
5910 offset table. */
5911 bfd_vma off;
5912 bfd_vma *offp;
5913 unsigned long indx;
5914
5915 if (htab->got == NULL)
5916 abort ();
5917
5918 indx = 0;
5919 if (tls_type == (TLS_TLS | TLS_LD)
5920 && (h == NULL
5921 || !h->def_dynamic))
5922 offp = &htab->tlsld_got.offset;
5923 else if (h != NULL)
5924 {
5925 bfd_boolean dyn;
5926 dyn = htab->elf.dynamic_sections_created;
5927 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5928 || (info->shared
5929 && SYMBOL_REFERENCES_LOCAL (info, h)))
5930 /* This is actually a static link, or it is a
5931 -Bsymbolic link and the symbol is defined
5932 locally, or the symbol was forced to be local
5933 because of a version file. */
5934 ;
5935 else
5936 {
5937 indx = h->dynindx;
5938 unresolved_reloc = FALSE;
5939 }
5940 offp = &h->got.offset;
5941 }
5942 else
5943 {
5944 if (local_got_offsets == NULL)
5945 abort ();
5946 offp = &local_got_offsets[r_symndx];
5947 }
5948
5949 /* The offset must always be a multiple of 4. We use the
5950 least significant bit to record whether we have already
5951 processed this entry. */
5952 off = *offp;
5953 if ((off & 1) != 0)
5954 off &= ~1;
5955 else
5956 {
5957 unsigned int tls_m = (tls_mask
5958 & (TLS_LD | TLS_GD | TLS_DTPREL
5959 | TLS_TPREL | TLS_TPRELGD));
5960
5961 if (offp == &htab->tlsld_got.offset)
5962 tls_m = TLS_LD;
5963 else if (h == NULL
5964 || !h->def_dynamic)
5965 tls_m &= ~TLS_LD;
5966
5967 /* We might have multiple got entries for this sym.
5968 Initialize them all. */
5969 do
5970 {
5971 int tls_ty = 0;
5972
5973 if ((tls_m & TLS_LD) != 0)
5974 {
5975 tls_ty = TLS_TLS | TLS_LD;
5976 tls_m &= ~TLS_LD;
5977 }
5978 else if ((tls_m & TLS_GD) != 0)
5979 {
5980 tls_ty = TLS_TLS | TLS_GD;
5981 tls_m &= ~TLS_GD;
5982 }
5983 else if ((tls_m & TLS_DTPREL) != 0)
5984 {
5985 tls_ty = TLS_TLS | TLS_DTPREL;
5986 tls_m &= ~TLS_DTPREL;
5987 }
5988 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5989 {
5990 tls_ty = TLS_TLS | TLS_TPREL;
5991 tls_m = 0;
5992 }
5993
5994 /* Generate relocs for the dynamic linker. */
5995 if ((info->shared || indx != 0)
5996 && (h == NULL
5997 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5998 || h->root.type != bfd_link_hash_undefweak))
5999 {
6000 outrel.r_offset = (htab->got->output_section->vma
6001 + htab->got->output_offset
6002 + off);
6003 outrel.r_addend = 0;
6004 if (tls_ty & (TLS_LD | TLS_GD))
6005 {
6006 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6007 if (tls_ty == (TLS_TLS | TLS_GD))
6008 {
6009 loc = htab->relgot->contents;
6010 loc += (htab->relgot->reloc_count++
6011 * sizeof (Elf32_External_Rela));
6012 bfd_elf32_swap_reloca_out (output_bfd,
6013 &outrel, loc);
6014 outrel.r_offset += 4;
6015 outrel.r_info
6016 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6017 }
6018 }
6019 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6020 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6021 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6022 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6023 else if (indx == 0)
6024 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6025 else
6026 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6027 if (indx == 0)
6028 {
6029 outrel.r_addend += relocation;
6030 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6031 outrel.r_addend -= htab->elf.tls_sec->vma;
6032 }
6033 loc = htab->relgot->contents;
6034 loc += (htab->relgot->reloc_count++
6035 * sizeof (Elf32_External_Rela));
6036 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6037 }
6038
6039 /* Init the .got section contents if we're not
6040 emitting a reloc. */
6041 else
6042 {
6043 bfd_vma value = relocation;
6044
6045 if (tls_ty == (TLS_TLS | TLS_LD))
6046 value = 1;
6047 else if (tls_ty != 0)
6048 {
6049 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6050 if (tls_ty == (TLS_TLS | TLS_TPREL))
6051 value += DTP_OFFSET - TP_OFFSET;
6052
6053 if (tls_ty == (TLS_TLS | TLS_GD))
6054 {
6055 bfd_put_32 (output_bfd, value,
6056 htab->got->contents + off + 4);
6057 value = 1;
6058 }
6059 }
6060 bfd_put_32 (output_bfd, value,
6061 htab->got->contents + off);
6062 }
6063
6064 off += 4;
6065 if (tls_ty & (TLS_LD | TLS_GD))
6066 off += 4;
6067 }
6068 while (tls_m != 0);
6069
6070 off = *offp;
6071 *offp = off | 1;
6072 }
6073
6074 if (off >= (bfd_vma) -2)
6075 abort ();
6076
6077 if ((tls_type & TLS_TLS) != 0)
6078 {
6079 if (tls_type != (TLS_TLS | TLS_LD))
6080 {
6081 if ((tls_mask & TLS_LD) != 0
6082 && !(h == NULL
6083 || !h->def_dynamic))
6084 off += 8;
6085 if (tls_type != (TLS_TLS | TLS_GD))
6086 {
6087 if ((tls_mask & TLS_GD) != 0)
6088 off += 8;
6089 if (tls_type != (TLS_TLS | TLS_DTPREL))
6090 {
6091 if ((tls_mask & TLS_DTPREL) != 0)
6092 off += 4;
6093 }
6094 }
6095 }
6096 }
6097
6098 relocation = htab->got->output_offset + off;
6099 relocation -= htab->elf.hgot->root.u.def.value;
6100
6101 /* Addends on got relocations don't make much sense.
6102 x+off@got is actually x@got+off, and since the got is
6103 generated by a hash table traversal, the value in the
6104 got at entry m+n bears little relation to the entry m. */
6105 if (addend != 0)
6106 (*_bfd_error_handler)
6107 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6108 input_bfd,
6109 input_section,
6110 (long) rel->r_offset,
6111 howto->name,
6112 sym_name);
6113 }
6114 break;
6115
6116 /* Relocations that need no special processing. */
6117 case R_PPC_LOCAL24PC:
6118 /* It makes no sense to point a local relocation
6119 at a symbol not in this object. */
6120 if (unresolved_reloc)
6121 {
6122 if (! (*info->callbacks->undefined_symbol) (info,
6123 h->root.root.string,
6124 input_bfd,
6125 input_section,
6126 rel->r_offset,
6127 TRUE))
6128 return FALSE;
6129 continue;
6130 }
6131 break;
6132
6133 case R_PPC_DTPREL16:
6134 case R_PPC_DTPREL16_LO:
6135 case R_PPC_DTPREL16_HI:
6136 case R_PPC_DTPREL16_HA:
6137 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6138 break;
6139
6140 /* Relocations that may need to be propagated if this is a shared
6141 object. */
6142 case R_PPC_TPREL16:
6143 case R_PPC_TPREL16_LO:
6144 case R_PPC_TPREL16_HI:
6145 case R_PPC_TPREL16_HA:
6146 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6147 /* The TPREL16 relocs shouldn't really be used in shared
6148 libs as they will result in DT_TEXTREL being set, but
6149 support them anyway. */
6150 goto dodyn;
6151
6152 case R_PPC_TPREL32:
6153 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6154 goto dodyn;
6155
6156 case R_PPC_DTPREL32:
6157 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6158 goto dodyn;
6159
6160 case R_PPC_DTPMOD32:
6161 relocation = 1;
6162 addend = 0;
6163 goto dodyn;
6164
6165 case R_PPC_REL16:
6166 case R_PPC_REL16_LO:
6167 case R_PPC_REL16_HI:
6168 case R_PPC_REL16_HA:
6169 break;
6170
6171 case R_PPC_REL24:
6172 case R_PPC_REL32:
6173 case R_PPC_REL14:
6174 case R_PPC_REL14_BRTAKEN:
6175 case R_PPC_REL14_BRNTAKEN:
6176 /* If these relocations are not to a named symbol, they can be
6177 handled right here, no need to bother the dynamic linker. */
6178 if (SYMBOL_REFERENCES_LOCAL (info, h)
6179 || h == htab->elf.hgot)
6180 break;
6181 /* fall through */
6182
6183 /* Relocations that always need to be propagated if this is a shared
6184 object. */
6185 case R_PPC_ADDR32:
6186 case R_PPC_ADDR24:
6187 case R_PPC_ADDR16:
6188 case R_PPC_ADDR16_LO:
6189 case R_PPC_ADDR16_HI:
6190 case R_PPC_ADDR16_HA:
6191 case R_PPC_ADDR14:
6192 case R_PPC_ADDR14_BRTAKEN:
6193 case R_PPC_ADDR14_BRNTAKEN:
6194 case R_PPC_UADDR32:
6195 case R_PPC_UADDR16:
6196 /* r_symndx will be zero only for relocs against symbols
6197 from removed linkonce sections, or sections discarded by
6198 a linker script. */
6199 dodyn:
6200 if (r_symndx == 0)
6201 break;
6202 /* Fall thru. */
6203
6204 if ((input_section->flags & SEC_ALLOC) == 0)
6205 break;
6206 /* Fall thru. */
6207
6208 if ((info->shared
6209 && (h == NULL
6210 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6211 || h->root.type != bfd_link_hash_undefweak)
6212 && (MUST_BE_DYN_RELOC (r_type)
6213 || !SYMBOL_CALLS_LOCAL (info, h)))
6214 || (ELIMINATE_COPY_RELOCS
6215 && !info->shared
6216 && h != NULL
6217 && h->dynindx != -1
6218 && !h->non_got_ref
6219 && h->def_dynamic
6220 && !h->def_regular))
6221 {
6222 int skip;
6223
6224 #ifdef DEBUG
6225 fprintf (stderr, "ppc_elf_relocate_section needs to "
6226 "create relocation for %s\n",
6227 (h && h->root.root.string
6228 ? h->root.root.string : "<unknown>"));
6229 #endif
6230
6231 /* When generating a shared object, these relocations
6232 are copied into the output file to be resolved at run
6233 time. */
6234 if (sreloc == NULL)
6235 {
6236 const char *name;
6237
6238 name = (bfd_elf_string_from_elf_section
6239 (input_bfd,
6240 elf_elfheader (input_bfd)->e_shstrndx,
6241 elf_section_data (input_section)->rel_hdr.sh_name));
6242 if (name == NULL)
6243 return FALSE;
6244
6245 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6246 && strcmp (bfd_get_section_name (input_bfd,
6247 input_section),
6248 name + 5) == 0);
6249
6250 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6251 BFD_ASSERT (sreloc != NULL);
6252 }
6253
6254 skip = 0;
6255
6256 outrel.r_offset =
6257 _bfd_elf_section_offset (output_bfd, info, input_section,
6258 rel->r_offset);
6259 if (outrel.r_offset == (bfd_vma) -1
6260 || outrel.r_offset == (bfd_vma) -2)
6261 skip = (int) outrel.r_offset;
6262 outrel.r_offset += (input_section->output_section->vma
6263 + input_section->output_offset);
6264
6265 if (skip)
6266 memset (&outrel, 0, sizeof outrel);
6267 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6268 {
6269 unresolved_reloc = FALSE;
6270 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6271 outrel.r_addend = rel->r_addend;
6272 }
6273 else
6274 {
6275 outrel.r_addend = relocation + rel->r_addend;
6276
6277 if (r_type == R_PPC_ADDR32)
6278 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6279 else
6280 {
6281 long indx;
6282
6283 if (bfd_is_abs_section (sec))
6284 indx = 0;
6285 else if (sec == NULL || sec->owner == NULL)
6286 {
6287 bfd_set_error (bfd_error_bad_value);
6288 return FALSE;
6289 }
6290 else
6291 {
6292 asection *osec;
6293
6294 /* We are turning this relocation into one
6295 against a section symbol. It would be
6296 proper to subtract the symbol's value,
6297 osec->vma, from the emitted reloc addend,
6298 but ld.so expects buggy relocs. */
6299 osec = sec->output_section;
6300 indx = elf_section_data (osec)->dynindx;
6301 BFD_ASSERT (indx > 0);
6302 #ifdef DEBUG
6303 if (indx <= 0)
6304 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6305 indx, osec->name, osec->flags,
6306 h->root.root.string);
6307 #endif
6308 }
6309
6310 outrel.r_info = ELF32_R_INFO (indx, r_type);
6311 }
6312 }
6313
6314 loc = sreloc->contents;
6315 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6316 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6317
6318 if (skip == -1)
6319 continue;
6320
6321 /* This reloc will be computed at runtime. We clear the memory
6322 so that it contains predictable value. */
6323 if (! skip
6324 && ((input_section->flags & SEC_ALLOC) != 0
6325 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6326 {
6327 relocation = howto->pc_relative ? outrel.r_offset : 0;
6328 addend = 0;
6329 break;
6330 }
6331 }
6332 break;
6333
6334 case R_PPC_RELAX32PC_PLT:
6335 case R_PPC_RELAX32_PLT:
6336 {
6337 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6338
6339 if (htab->plt_type == PLT_NEW)
6340 relocation = (htab->glink->output_section->vma
6341 + htab->glink->output_offset
6342 + ent->glink_offset);
6343 else
6344 relocation = (htab->plt->output_section->vma
6345 + htab->plt->output_offset
6346 + ent->plt.offset);
6347 addend = 0;
6348 }
6349 if (r_type == R_PPC_RELAX32_PLT)
6350 goto relax32;
6351 /* Fall thru */
6352
6353 case R_PPC_RELAX32PC:
6354 relocation -= (input_section->output_section->vma
6355 + input_section->output_offset
6356 + rel->r_offset - 4);
6357 /* Fall thru */
6358
6359 case R_PPC_RELAX32:
6360 relax32:
6361 {
6362 unsigned long t0;
6363 unsigned long t1;
6364
6365 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6366 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6367
6368 /* We're clearing the bits for R_PPC_ADDR16_HA
6369 and R_PPC_ADDR16_LO here. */
6370 t0 &= ~0xffff;
6371 t1 &= ~0xffff;
6372
6373 /* t0 is HA, t1 is LO */
6374 relocation += addend;
6375 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6376 t1 |= relocation & 0xffff;
6377
6378 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6379 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6380 }
6381 continue;
6382
6383 /* Indirect .sdata relocation. */
6384 case R_PPC_EMB_SDAI16:
6385 BFD_ASSERT (htab->sdata[0].section != NULL);
6386 relocation
6387 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6388 h, relocation, rel);
6389 break;
6390
6391 /* Indirect .sdata2 relocation. */
6392 case R_PPC_EMB_SDA2I16:
6393 BFD_ASSERT (htab->sdata[1].section != NULL);
6394 relocation
6395 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6396 h, relocation, rel);
6397 break;
6398
6399 /* Handle the TOC16 reloc. We want to use the offset within the .got
6400 section, not the actual VMA. This is appropriate when generating
6401 an embedded ELF object, for which the .got section acts like the
6402 AIX .toc section. */
6403 case R_PPC_TOC16: /* phony GOT16 relocations */
6404 BFD_ASSERT (sec != NULL);
6405 BFD_ASSERT (bfd_is_und_section (sec)
6406 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6407 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6408
6409 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6410 break;
6411
6412 case R_PPC_PLTREL24:
6413 /* Relocation is to the entry for this symbol in the
6414 procedure linkage table. */
6415 {
6416 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6417
6418 addend = 0;
6419 if (ent == NULL
6420 || htab->plt == NULL)
6421 {
6422 /* We didn't make a PLT entry for this symbol. This
6423 happens when statically linking PIC code, or when
6424 using -Bsymbolic. */
6425 break;
6426 }
6427
6428 unresolved_reloc = FALSE;
6429 if (htab->plt_type == PLT_NEW)
6430 relocation = (htab->glink->output_section->vma
6431 + htab->glink->output_offset
6432 + ent->glink_offset);
6433 else
6434 relocation = (htab->plt->output_section->vma
6435 + htab->plt->output_offset
6436 + ent->plt.offset);
6437 }
6438 break;
6439
6440 /* Relocate against _SDA_BASE_. */
6441 case R_PPC_SDAREL16:
6442 {
6443 const char *name;
6444 struct elf_link_hash_entry *sh;
6445
6446 BFD_ASSERT (sec != NULL);
6447 name = bfd_get_section_name (abfd, sec->output_section);
6448 if (! ((strncmp (name, ".sdata", 6) == 0
6449 && (name[6] == 0 || name[6] == '.'))
6450 || (strncmp (name, ".sbss", 5) == 0
6451 && (name[5] == 0 || name[5] == '.'))))
6452 {
6453 (*_bfd_error_handler)
6454 (_("%B: the target (%s) of a %s relocation is "
6455 "in the wrong output section (%s)"),
6456 input_bfd,
6457 sym_name,
6458 howto->name,
6459 name);
6460 }
6461 sh = htab->sdata[0].sym;
6462 addend -= (sh->root.u.def.value
6463 + sh->root.u.def.section->output_offset
6464 + sh->root.u.def.section->output_section->vma);
6465 }
6466 break;
6467
6468 /* Relocate against _SDA2_BASE_. */
6469 case R_PPC_EMB_SDA2REL:
6470 {
6471 const char *name;
6472 struct elf_link_hash_entry *sh;
6473
6474 BFD_ASSERT (sec != NULL);
6475 name = bfd_get_section_name (abfd, sec->output_section);
6476 if (! (strncmp (name, ".sdata2", 7) == 0
6477 || strncmp (name, ".sbss2", 6) == 0))
6478 {
6479 (*_bfd_error_handler)
6480 (_("%B: the target (%s) of a %s relocation is "
6481 "in the wrong output section (%s)"),
6482 input_bfd,
6483 sym_name,
6484 howto->name,
6485 name);
6486
6487 bfd_set_error (bfd_error_bad_value);
6488 ret = FALSE;
6489 continue;
6490 }
6491 sh = htab->sdata[1].sym;
6492 addend -= (sh->root.u.def.value
6493 + sh->root.u.def.section->output_offset
6494 + sh->root.u.def.section->output_section->vma);
6495 }
6496 break;
6497
6498 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6499 case R_PPC_EMB_SDA21:
6500 case R_PPC_EMB_RELSDA:
6501 {
6502 const char *name;
6503 int reg;
6504 struct elf_link_hash_entry *sh;
6505
6506 BFD_ASSERT (sec != NULL);
6507 name = bfd_get_section_name (abfd, sec->output_section);
6508 if (((strncmp (name, ".sdata", 6) == 0
6509 && (name[6] == 0 || name[6] == '.'))
6510 || (strncmp (name, ".sbss", 5) == 0
6511 && (name[5] == 0 || name[5] == '.'))))
6512 {
6513 reg = 13;
6514 sh = htab->sdata[0].sym;
6515 addend -= (sh->root.u.def.value
6516 + sh->root.u.def.section->output_offset
6517 + sh->root.u.def.section->output_section->vma);
6518 }
6519
6520 else if (strncmp (name, ".sdata2", 7) == 0
6521 || strncmp (name, ".sbss2", 6) == 0)
6522 {
6523 reg = 2;
6524 sh = htab->sdata[1].sym;
6525 addend -= (sh->root.u.def.value
6526 + sh->root.u.def.section->output_offset
6527 + sh->root.u.def.section->output_section->vma);
6528 }
6529
6530 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6531 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6532 {
6533 reg = 0;
6534 }
6535
6536 else
6537 {
6538 (*_bfd_error_handler)
6539 (_("%B: the target (%s) of a %s relocation is "
6540 "in the wrong output section (%s)"),
6541 input_bfd,
6542 sym_name,
6543 howto->name,
6544 name);
6545
6546 bfd_set_error (bfd_error_bad_value);
6547 ret = FALSE;
6548 continue;
6549 }
6550
6551 if (r_type == R_PPC_EMB_SDA21)
6552 { /* fill in register field */
6553 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6554 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6555 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6556 }
6557 }
6558 break;
6559
6560 /* Relocate against the beginning of the section. */
6561 case R_PPC_SECTOFF:
6562 case R_PPC_SECTOFF_LO:
6563 case R_PPC_SECTOFF_HI:
6564 case R_PPC_SECTOFF_HA:
6565 BFD_ASSERT (sec != NULL);
6566 addend -= sec->output_section->vma;
6567 break;
6568
6569 /* Negative relocations. */
6570 case R_PPC_EMB_NADDR32:
6571 case R_PPC_EMB_NADDR16:
6572 case R_PPC_EMB_NADDR16_LO:
6573 case R_PPC_EMB_NADDR16_HI:
6574 case R_PPC_EMB_NADDR16_HA:
6575 addend -= 2 * relocation;
6576 break;
6577
6578 case R_PPC_COPY:
6579 case R_PPC_GLOB_DAT:
6580 case R_PPC_JMP_SLOT:
6581 case R_PPC_RELATIVE:
6582 case R_PPC_PLT32:
6583 case R_PPC_PLTREL32:
6584 case R_PPC_PLT16_LO:
6585 case R_PPC_PLT16_HI:
6586 case R_PPC_PLT16_HA:
6587 case R_PPC_ADDR30:
6588 case R_PPC_EMB_RELSEC16:
6589 case R_PPC_EMB_RELST_LO:
6590 case R_PPC_EMB_RELST_HI:
6591 case R_PPC_EMB_RELST_HA:
6592 case R_PPC_EMB_BIT_FLD:
6593 (*_bfd_error_handler)
6594 (_("%B: relocation %s is not yet supported for symbol %s."),
6595 input_bfd,
6596 howto->name,
6597 sym_name);
6598
6599 bfd_set_error (bfd_error_invalid_operation);
6600 ret = FALSE;
6601 continue;
6602 }
6603
6604 /* Do any further special processing. */
6605 switch (r_type)
6606 {
6607 default:
6608 break;
6609
6610 case R_PPC_ADDR16_HA:
6611 case R_PPC_REL16_HA:
6612 case R_PPC_GOT16_HA:
6613 case R_PPC_PLT16_HA:
6614 case R_PPC_SECTOFF_HA:
6615 case R_PPC_TPREL16_HA:
6616 case R_PPC_DTPREL16_HA:
6617 case R_PPC_GOT_TLSGD16_HA:
6618 case R_PPC_GOT_TLSLD16_HA:
6619 case R_PPC_GOT_TPREL16_HA:
6620 case R_PPC_GOT_DTPREL16_HA:
6621 case R_PPC_EMB_NADDR16_HA:
6622 case R_PPC_EMB_RELST_HA:
6623 /* It's just possible that this symbol is a weak symbol
6624 that's not actually defined anywhere. In that case,
6625 'sec' would be NULL, and we should leave the symbol
6626 alone (it will be set to zero elsewhere in the link). */
6627 if (sec != NULL)
6628 /* Add 0x10000 if sign bit in 0:15 is set.
6629 Bits 0:15 are not used. */
6630 addend += 0x8000;
6631 break;
6632 }
6633
6634 #ifdef DEBUG
6635 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6636 "offset = %ld, addend = %ld\n",
6637 howto->name,
6638 (int) r_type,
6639 sym_name,
6640 r_symndx,
6641 (long) rel->r_offset,
6642 (long) addend);
6643 #endif
6644
6645 if (unresolved_reloc
6646 && !((input_section->flags & SEC_DEBUGGING) != 0
6647 && h->def_dynamic))
6648 {
6649 (*_bfd_error_handler)
6650 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6651 input_bfd,
6652 input_section,
6653 (long) rel->r_offset,
6654 howto->name,
6655 sym_name);
6656 ret = FALSE;
6657 }
6658
6659 r = _bfd_final_link_relocate (howto,
6660 input_bfd,
6661 input_section,
6662 contents,
6663 rel->r_offset,
6664 relocation,
6665 addend);
6666
6667 if (r != bfd_reloc_ok)
6668 {
6669 if (r == bfd_reloc_overflow)
6670 {
6671 if (warned)
6672 continue;
6673 if (h != NULL
6674 && h->root.type == bfd_link_hash_undefweak
6675 && howto->pc_relative)
6676 {
6677 /* Assume this is a call protected by other code that
6678 detect the symbol is undefined. If this is the case,
6679 we can safely ignore the overflow. If not, the
6680 program is hosed anyway, and a little warning isn't
6681 going to help. */
6682
6683 continue;
6684 }
6685
6686 if (! (*info->callbacks->reloc_overflow) (info,
6687 (h ? &h->root : NULL),
6688 sym_name,
6689 howto->name,
6690 rel->r_addend,
6691 input_bfd,
6692 input_section,
6693 rel->r_offset))
6694 return FALSE;
6695 }
6696 else
6697 {
6698 (*_bfd_error_handler)
6699 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6700 input_bfd, input_section,
6701 (long) rel->r_offset, howto->name, sym_name, (int) r);
6702 ret = FALSE;
6703 }
6704 }
6705 }
6706
6707 #ifdef DEBUG
6708 fprintf (stderr, "\n");
6709 #endif
6710
6711 return ret;
6712 }
6713 \f
6714 #define PPC_LO(v) ((v) & 0xffff)
6715 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6716 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6717
6718 /* Finish up dynamic symbol handling. We set the contents of various
6719 dynamic sections here. */
6720
6721 static bfd_boolean
6722 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6723 struct bfd_link_info *info,
6724 struct elf_link_hash_entry *h,
6725 Elf_Internal_Sym *sym)
6726 {
6727 struct ppc_elf_link_hash_table *htab;
6728 struct plt_entry *ent;
6729 bfd_boolean doneone;
6730
6731 #ifdef DEBUG
6732 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6733 h->root.root.string);
6734 #endif
6735
6736 htab = ppc_elf_hash_table (info);
6737 BFD_ASSERT (htab->elf.dynobj != NULL);
6738
6739 doneone = FALSE;
6740 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6741 if (ent->plt.offset != (bfd_vma) -1)
6742 {
6743 if (!doneone)
6744 {
6745 Elf_Internal_Rela rela;
6746 bfd_byte *loc;
6747 bfd_vma reloc_index;
6748
6749 if (htab->plt_type == PLT_NEW)
6750 reloc_index = ent->plt.offset / 4;
6751 else
6752 {
6753 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6754 / htab->plt_slot_size);
6755 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6756 && htab->plt_type == PLT_OLD)
6757 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6758 }
6759
6760 /* This symbol has an entry in the procedure linkage table.
6761 Set it up. */
6762 if (htab->plt_type == PLT_VXWORKS)
6763 {
6764 bfd_vma got_offset;
6765 const bfd_vma *plt_entry;
6766
6767 /* The first three entries in .got.plt are reserved. */
6768 got_offset = (reloc_index + 3) * 4;
6769
6770 /* Use the right PLT. */
6771 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6772 : ppc_elf_vxworks_plt_entry;
6773
6774 /* Fill in the .plt on VxWorks. */
6775 if (info->shared)
6776 {
6777 bfd_vma got_offset_hi = (got_offset >> 16)
6778 + ((got_offset & 0x8000) >> 15);
6779
6780 bfd_put_32 (output_bfd,
6781 plt_entry[0] | (got_offset_hi & 0xffff),
6782 htab->plt->contents + ent->plt.offset + 0);
6783 bfd_put_32 (output_bfd,
6784 plt_entry[1] | (got_offset & 0xffff),
6785 htab->plt->contents + ent->plt.offset + 4);
6786 }
6787 else
6788 {
6789 bfd_vma got_loc
6790 = (got_offset
6791 + htab->elf.hgot->root.u.def.value
6792 + htab->elf.hgot->root.u.def.section->output_offset
6793 + htab->elf.hgot->root.u.def.section->output_section->vma);
6794 bfd_vma got_loc_hi = (got_loc >> 16)
6795 + ((got_loc & 0x8000) >> 15);
6796
6797 bfd_put_32 (output_bfd,
6798 plt_entry[0] | (got_loc_hi & 0xffff),
6799 htab->plt->contents + ent->plt.offset + 0);
6800 bfd_put_32 (output_bfd,
6801 plt_entry[1] | (got_loc & 0xffff),
6802 htab->plt->contents + ent->plt.offset + 4);
6803 }
6804
6805 bfd_put_32 (output_bfd, plt_entry[2],
6806 htab->plt->contents + ent->plt.offset + 8);
6807 bfd_put_32 (output_bfd, plt_entry[3],
6808 htab->plt->contents + ent->plt.offset + 12);
6809
6810 /* This instruction is an immediate load. The value loaded is
6811 the byte offset of the R_PPC_JMP_SLOT relocation from the
6812 start of the .rela.plt section. The value is stored in the
6813 low-order 16 bits of the load instruction. */
6814 /* NOTE: It appears that this is now an index rather than a
6815 prescaled offset. */
6816 bfd_put_32 (output_bfd,
6817 plt_entry[4] | reloc_index,
6818 htab->plt->contents + ent->plt.offset + 16);
6819 /* This instruction is a PC-relative branch whose target is
6820 the start of the PLT section. The address of this branch
6821 instruction is 20 bytes beyond the start of this PLT entry.
6822 The address is encoded in bits 6-29, inclusive. The value
6823 stored is right-shifted by two bits, permitting a 26-bit
6824 offset. */
6825 bfd_put_32 (output_bfd,
6826 (plt_entry[5]
6827 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6828 htab->plt->contents + ent->plt.offset + 20);
6829 bfd_put_32 (output_bfd, plt_entry[6],
6830 htab->plt->contents + ent->plt.offset + 24);
6831 bfd_put_32 (output_bfd, plt_entry[7],
6832 htab->plt->contents + ent->plt.offset + 28);
6833
6834 /* Fill in the GOT entry corresponding to this PLT slot with
6835 the address immediately after the the "bctr" instruction
6836 in this PLT entry. */
6837 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6838 + htab->plt->output_offset
6839 + ent->plt.offset + 16),
6840 htab->sgotplt->contents + got_offset);
6841
6842 if (!info->shared)
6843 {
6844 /* Fill in a couple of entries in .rela.plt.unloaded. */
6845 loc = htab->srelplt2->contents
6846 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6847 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6848 * sizeof (Elf32_External_Rela));
6849
6850 /* Provide the @ha relocation for the first instruction. */
6851 rela.r_offset = (htab->plt->output_section->vma
6852 + htab->plt->output_offset
6853 + ent->plt.offset + 2);
6854 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6855 R_PPC_ADDR16_HA);
6856 rela.r_addend = got_offset;
6857 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6858 loc += sizeof (Elf32_External_Rela);
6859
6860 /* Provide the @l relocation for the second instruction. */
6861 rela.r_offset = (htab->plt->output_section->vma
6862 + htab->plt->output_offset
6863 + ent->plt.offset + 6);
6864 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6865 R_PPC_ADDR16_LO);
6866 rela.r_addend = got_offset;
6867 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6868 loc += sizeof (Elf32_External_Rela);
6869
6870 /* Provide a relocation for the GOT entry corresponding to this
6871 PLT slot. Point it at the middle of the .plt entry. */
6872 rela.r_offset = (htab->sgotplt->output_section->vma
6873 + htab->sgotplt->output_offset
6874 + got_offset);
6875 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6876 R_PPC_ADDR32);
6877 rela.r_addend = ent->plt.offset + 16;
6878 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6879 }
6880
6881 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6882 In particular, the offset for the relocation is not the
6883 address of the PLT entry for this function, as specified
6884 by the ABI. Instead, the offset is set to the address of
6885 the GOT slot for this function. See EABI 4.4.4.1. */
6886 rela.r_offset = (htab->sgotplt->output_section->vma
6887 + htab->sgotplt->output_offset
6888 + got_offset);
6889
6890 }
6891 else
6892 {
6893 rela.r_offset = (htab->plt->output_section->vma
6894 + htab->plt->output_offset
6895 + ent->plt.offset);
6896 if (htab->plt_type == PLT_OLD)
6897 {
6898 /* We don't need to fill in the .plt. The ppc dynamic
6899 linker will fill it in. */
6900 }
6901 else
6902 {
6903 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6904 + htab->glink->output_section->vma
6905 + htab->glink->output_offset);
6906 bfd_put_32 (output_bfd, val,
6907 htab->plt->contents + ent->plt.offset);
6908 }
6909 }
6910
6911 /* Fill in the entry in the .rela.plt section. */
6912 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6913 rela.r_addend = 0;
6914
6915 loc = (htab->relplt->contents
6916 + reloc_index * sizeof (Elf32_External_Rela));
6917 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6918
6919 if (!h->def_regular)
6920 {
6921 /* Mark the symbol as undefined, rather than as defined in
6922 the .plt section. Leave the value alone. */
6923 sym->st_shndx = SHN_UNDEF;
6924 /* If the symbol is weak, we do need to clear the value.
6925 Otherwise, the PLT entry would provide a definition for
6926 the symbol even if the symbol wasn't defined anywhere,
6927 and so the symbol would never be NULL. */
6928 if (!h->ref_regular_nonweak)
6929 sym->st_value = 0;
6930 }
6931 doneone = TRUE;
6932 }
6933
6934 if (htab->plt_type == PLT_NEW)
6935 {
6936 bfd_vma plt;
6937 unsigned char *p;
6938
6939 plt = (ent->plt.offset
6940 + htab->plt->output_section->vma
6941 + htab->plt->output_offset);
6942 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6943
6944 if (info->shared || info->pie)
6945 {
6946 bfd_vma got = 0;
6947
6948 if (ent->addend >= 32768)
6949 got = (ent->addend
6950 + ent->sec->output_section->vma
6951 + ent->sec->output_offset);
6952 else if (htab->elf.hgot != NULL)
6953 got = (htab->elf.hgot->root.u.def.value
6954 + htab->elf.hgot->root.u.def.section->output_section->vma
6955 + htab->elf.hgot->root.u.def.section->output_offset);
6956
6957 plt -= got;
6958
6959 if (plt + 0x8000 < 0x10000)
6960 {
6961 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6962 p += 4;
6963 bfd_put_32 (output_bfd, MTCTR_11, p);
6964 p += 4;
6965 bfd_put_32 (output_bfd, BCTR, p);
6966 p += 4;
6967 bfd_put_32 (output_bfd, NOP, p);
6968 p += 4;
6969 }
6970 else
6971 {
6972 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6973 p += 4;
6974 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6975 p += 4;
6976 bfd_put_32 (output_bfd, MTCTR_11, p);
6977 p += 4;
6978 bfd_put_32 (output_bfd, BCTR, p);
6979 p += 4;
6980 }
6981 }
6982 else
6983 {
6984 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6985 p += 4;
6986 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6987 p += 4;
6988 bfd_put_32 (output_bfd, MTCTR_11, p);
6989 p += 4;
6990 bfd_put_32 (output_bfd, BCTR, p);
6991 p += 4;
6992
6993 /* We only need one non-PIC glink stub. */
6994 break;
6995 }
6996 }
6997 else
6998 break;
6999 }
7000
7001 if (h->needs_copy)
7002 {
7003 asection *s;
7004 Elf_Internal_Rela rela;
7005 bfd_byte *loc;
7006
7007 /* This symbols needs a copy reloc. Set it up. */
7008
7009 #ifdef DEBUG
7010 fprintf (stderr, ", copy");
7011 #endif
7012
7013 BFD_ASSERT (h->dynindx != -1);
7014
7015 if (ppc_elf_hash_entry (h)->has_sda_refs)
7016 s = htab->relsbss;
7017 else
7018 s = htab->relbss;
7019 BFD_ASSERT (s != NULL);
7020
7021 rela.r_offset = (h->root.u.def.value
7022 + h->root.u.def.section->output_section->vma
7023 + h->root.u.def.section->output_offset);
7024 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7025 rela.r_addend = 0;
7026 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7027 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7028 }
7029
7030 #ifdef DEBUG
7031 fprintf (stderr, "\n");
7032 #endif
7033
7034 /* Mark some specially defined symbols as absolute. */
7035 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7036 || (!htab->is_vxworks
7037 && (h == htab->elf.hgot
7038 || strcmp (h->root.root.string,
7039 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7040 sym->st_shndx = SHN_ABS;
7041
7042 return TRUE;
7043 }
7044 \f
7045 static enum elf_reloc_type_class
7046 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7047 {
7048 switch (ELF32_R_TYPE (rela->r_info))
7049 {
7050 case R_PPC_RELATIVE:
7051 return reloc_class_relative;
7052 case R_PPC_REL24:
7053 case R_PPC_ADDR24:
7054 case R_PPC_JMP_SLOT:
7055 return reloc_class_plt;
7056 case R_PPC_COPY:
7057 return reloc_class_copy;
7058 default:
7059 return reloc_class_normal;
7060 }
7061 }
7062 \f
7063 /* Finish up the dynamic sections. */
7064
7065 static bfd_boolean
7066 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7067 struct bfd_link_info *info)
7068 {
7069 asection *sdyn;
7070 asection *splt;
7071 struct ppc_elf_link_hash_table *htab;
7072 bfd_vma got;
7073 bfd * dynobj;
7074
7075 #ifdef DEBUG
7076 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7077 #endif
7078
7079 htab = ppc_elf_hash_table (info);
7080 dynobj = elf_hash_table (info)->dynobj;
7081 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7082 if (htab->is_vxworks)
7083 splt = bfd_get_section_by_name (dynobj, ".plt");
7084 else
7085 splt = NULL;
7086
7087 got = 0;
7088 if (htab->elf.hgot != NULL)
7089 got = (htab->elf.hgot->root.u.def.value
7090 + htab->elf.hgot->root.u.def.section->output_section->vma
7091 + htab->elf.hgot->root.u.def.section->output_offset);
7092
7093 if (htab->elf.dynamic_sections_created)
7094 {
7095 Elf32_External_Dyn *dyncon, *dynconend;
7096
7097 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7098
7099 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7100 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7101 for (; dyncon < dynconend; dyncon++)
7102 {
7103 Elf_Internal_Dyn dyn;
7104 asection *s;
7105
7106 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7107
7108 switch (dyn.d_tag)
7109 {
7110 case DT_PLTGOT:
7111 if (htab->is_vxworks)
7112 s = htab->sgotplt;
7113 else
7114 s = htab->plt;
7115 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7116 break;
7117
7118 case DT_PLTRELSZ:
7119 dyn.d_un.d_val = htab->relplt->size;
7120 break;
7121
7122 case DT_JMPREL:
7123 s = htab->relplt;
7124 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7125 break;
7126
7127 case DT_PPC_GOT:
7128 dyn.d_un.d_ptr = got;
7129 break;
7130
7131 case DT_RELASZ:
7132 if (htab->is_vxworks)
7133 {
7134 if (htab->relplt)
7135 dyn.d_un.d_ptr -= htab->relplt->size;
7136 break;
7137 }
7138 continue;
7139
7140 default:
7141 continue;
7142 }
7143
7144 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7145 }
7146 }
7147
7148 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7149 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7150 if (htab->got != NULL)
7151 {
7152 unsigned char *p = htab->got->contents;
7153 bfd_vma val;
7154
7155 p += htab->elf.hgot->root.u.def.value;
7156 if (htab->plt_type == PLT_OLD)
7157 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7158
7159 val = 0;
7160 if (sdyn != NULL)
7161 val = sdyn->output_section->vma + sdyn->output_offset;
7162 bfd_put_32 (output_bfd, val, p);
7163
7164 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7165 }
7166
7167 /* Fill in the first entry in the VxWorks procedure linkage table. */
7168 if (splt && splt->size > 0)
7169 {
7170 /* Use the right PLT. */
7171 static const bfd_vma *plt_entry = NULL;
7172 plt_entry = info->shared ?
7173 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7174
7175 if (!info->shared)
7176 {
7177 bfd_vma got_value =
7178 (htab->elf.hgot->root.u.def.section->output_section->vma
7179 + htab->elf.hgot->root.u.def.section->output_offset
7180 + htab->elf.hgot->root.u.def.value);
7181 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7182
7183 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7184 splt->contents + 0);
7185 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7186 splt->contents + 4);
7187 }
7188 else
7189 {
7190 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7191 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7192 }
7193 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7194 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7195 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7196 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7197 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7198 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7199
7200 if (! info->shared)
7201 {
7202 Elf_Internal_Rela rela;
7203 bfd_byte *loc;
7204
7205 loc = htab->srelplt2->contents;
7206
7207 /* Output the @ha relocation for the first instruction. */
7208 rela.r_offset = (htab->plt->output_section->vma
7209 + htab->plt->output_offset
7210 + 2);
7211 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7212 rela.r_addend = 0;
7213 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7214 loc += sizeof (Elf32_External_Rela);
7215
7216 /* Output the @l relocation for the second instruction. */
7217 rela.r_offset = (htab->plt->output_section->vma
7218 + htab->plt->output_offset
7219 + 6);
7220 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7221 rela.r_addend = 0;
7222 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7223 loc += sizeof (Elf32_External_Rela);
7224
7225 /* Fix up the remaining relocations. They may have the wrong
7226 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7227 in which symbols were output. */
7228 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7229 {
7230 Elf_Internal_Rela rel;
7231
7232 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7233 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7234 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7235 loc += sizeof (Elf32_External_Rela);
7236
7237 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7238 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7239 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7240 loc += sizeof (Elf32_External_Rela);
7241
7242 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7243 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7244 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7245 loc += sizeof (Elf32_External_Rela);
7246 }
7247 }
7248 }
7249
7250 if (htab->glink != NULL && htab->glink->contents != NULL)
7251 {
7252 unsigned char *p;
7253 unsigned char *endp;
7254 bfd_vma res0;
7255 unsigned int i;
7256
7257 /*
7258 * PIC glink code is the following:
7259 *
7260 * # ith PLT code stub.
7261 * addis 11,30,(plt+(i-1)*4-got)@ha
7262 * lwz 11,(plt+(i-1)*4-got)@l(11)
7263 * mtctr 11
7264 * bctr
7265 *
7266 * # A table of branches, one for each plt entry.
7267 * # The idea is that the plt call stub loads ctr (and r11) with these
7268 * # addresses, so (r11 - res_0) gives the plt index * 4.
7269 * res_0: b PLTresolve
7270 * res_1: b PLTresolve
7271 * .
7272 * # Some number of entries towards the end can be nops
7273 * res_n_m3: nop
7274 * res_n_m2: nop
7275 * res_n_m1:
7276 *
7277 * PLTresolve:
7278 * addis 11,11,(1f-res_0)@ha
7279 * mflr 0
7280 * bcl 20,31,1f
7281 * 1: addi 11,11,(1b-res_0)@l
7282 * mflr 12
7283 * mtlr 0
7284 * sub 11,11,12 # r11 = index * 4
7285 * addis 12,12,(got+4-1b)@ha
7286 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7287 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7288 * mtctr 0
7289 * add 0,11,11
7290 * add 11,0,11 # r11 = index * 12 = reloc offset.
7291 * bctr
7292 */
7293 static const unsigned int pic_plt_resolve[] =
7294 {
7295 ADDIS_11_11,
7296 MFLR_0,
7297 BCL_20_31,
7298 ADDI_11_11,
7299 MFLR_12,
7300 MTLR_0,
7301 SUB_11_11_12,
7302 ADDIS_12_12,
7303 LWZ_0_12,
7304 LWZ_12_12,
7305 MTCTR_0,
7306 ADD_0_11_11,
7307 ADD_11_0_11,
7308 BCTR,
7309 NOP,
7310 NOP
7311 };
7312
7313 static const unsigned int plt_resolve[] =
7314 {
7315 LIS_12,
7316 ADDIS_11_11,
7317 LWZ_0_12,
7318 ADDI_11_11,
7319 MTCTR_0,
7320 ADD_0_11_11,
7321 LWZ_12_12,
7322 ADD_11_0_11,
7323 BCTR,
7324 NOP,
7325 NOP,
7326 NOP,
7327 NOP,
7328 NOP,
7329 NOP,
7330 NOP
7331 };
7332
7333 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7334 abort ();
7335 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7336 abort ();
7337
7338 /* Build the branch table, one for each plt entry (less one),
7339 and perhaps some padding. */
7340 p = htab->glink->contents;
7341 p += htab->glink_pltresolve;
7342 endp = htab->glink->contents;
7343 endp += htab->glink->size - GLINK_PLTRESOLVE;
7344 while (p < endp - 8 * 4)
7345 {
7346 bfd_put_32 (output_bfd, B + endp - p, p);
7347 p += 4;
7348 }
7349 while (p < endp)
7350 {
7351 bfd_put_32 (output_bfd, NOP, p);
7352 p += 4;
7353 }
7354
7355 res0 = (htab->glink_pltresolve
7356 + htab->glink->output_section->vma
7357 + htab->glink->output_offset);
7358
7359 /* Last comes the PLTresolve stub. */
7360 if (info->shared || info->pie)
7361 {
7362 bfd_vma bcl;
7363
7364 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7365 {
7366 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7367 p += 4;
7368 }
7369 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7370
7371 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7372 + htab->glink->output_section->vma
7373 + htab->glink->output_offset);
7374
7375 bfd_put_32 (output_bfd,
7376 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7377 bfd_put_32 (output_bfd,
7378 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7379 bfd_put_32 (output_bfd,
7380 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7381 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7382 {
7383 bfd_put_32 (output_bfd,
7384 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7385 bfd_put_32 (output_bfd,
7386 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7387 }
7388 else
7389 {
7390 bfd_put_32 (output_bfd,
7391 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7392 bfd_put_32 (output_bfd,
7393 LWZ_12_12 + 4, p + 9*4);
7394 }
7395 }
7396 else
7397 {
7398 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7399 {
7400 bfd_put_32 (output_bfd, plt_resolve[i], p);
7401 p += 4;
7402 }
7403 p -= 4 * ARRAY_SIZE (plt_resolve);
7404
7405 bfd_put_32 (output_bfd,
7406 LIS_12 + PPC_HA (got + 4), p + 0*4);
7407 bfd_put_32 (output_bfd,
7408 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7409 bfd_put_32 (output_bfd,
7410 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7411 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7412 {
7413 bfd_put_32 (output_bfd,
7414 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7415 bfd_put_32 (output_bfd,
7416 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7417 }
7418 else
7419 {
7420 bfd_put_32 (output_bfd,
7421 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7422 bfd_put_32 (output_bfd,
7423 LWZ_12_12 + 4, p + 6*4);
7424 }
7425 }
7426 }
7427
7428 return TRUE;
7429 }
7430 \f
7431 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7432 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7433 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7434 #define TARGET_BIG_NAME "elf32-powerpc"
7435 #define ELF_ARCH bfd_arch_powerpc
7436 #define ELF_MACHINE_CODE EM_PPC
7437 #ifdef __QNXTARGET__
7438 #define ELF_MAXPAGESIZE 0x1000
7439 #else
7440 #define ELF_MAXPAGESIZE 0x10000
7441 #endif
7442 #define ELF_MINPAGESIZE 0x1000
7443 #define ELF_COMMONPAGESIZE 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_type = PLT_VXWORKS;
7530 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7531 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7532 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7533 }
7534 return ret;
7535 }
7536
7537 /* Tweak magic VxWorks symbols as they are loaded. */
7538 static bfd_boolean
7539 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7540 struct bfd_link_info *info,
7541 Elf_Internal_Sym *sym,
7542 const char **namep ATTRIBUTE_UNUSED,
7543 flagword *flagsp ATTRIBUTE_UNUSED,
7544 asection **secp,
7545 bfd_vma *valp)
7546 {
7547 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7548 valp))
7549 return FALSE;
7550
7551 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7552 }
7553
7554 static void
7555 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7556 {
7557 ppc_elf_final_write_processing(abfd, linker);
7558 elf_vxworks_final_write_processing(abfd, linker);
7559 }
7560
7561 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7562 define it. */
7563 #undef elf_backend_want_plt_sym
7564 #define elf_backend_want_plt_sym 1
7565 #undef elf_backend_want_got_plt
7566 #define elf_backend_want_got_plt 1
7567 #undef elf_backend_got_symbol_offset
7568 #define elf_backend_got_symbol_offset 0
7569 #undef elf_backend_plt_not_loaded
7570 #define elf_backend_plt_not_loaded 0
7571 #undef elf_backend_plt_readonly
7572 #define elf_backend_plt_readonly 1
7573 #undef elf_backend_got_header_size
7574 #define elf_backend_got_header_size 12
7575
7576 #undef bfd_elf32_bfd_link_hash_table_create
7577 #define bfd_elf32_bfd_link_hash_table_create \
7578 ppc_elf_vxworks_link_hash_table_create
7579 #undef elf_backend_add_symbol_hook
7580 #define elf_backend_add_symbol_hook \
7581 ppc_elf_vxworks_add_symbol_hook
7582 #undef elf_backend_link_output_symbol_hook
7583 #define elf_backend_link_output_symbol_hook \
7584 elf_vxworks_link_output_symbol_hook
7585 #undef elf_backend_final_write_processing
7586 #define elf_backend_final_write_processing \
7587 ppc_elf_vxworks_final_write_processing
7588 #undef elf_backend_get_sec_type_attr
7589 #define elf_backend_get_sec_type_attr \
7590 ppc_elf_vxworks_get_sec_type_attr
7591 #undef elf_backend_emit_relocs
7592 #define elf_backend_emit_relocs \
7593 elf_vxworks_emit_relocs
7594
7595 #undef elf32_bed
7596 #define elf32_bed ppc_elf_vxworks_bed
7597
7598 #include "elf32-target.h"
GDB Binutils - Deliverables
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