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PR 6844
[binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160
161 /* The value of a defined global symbol. */
162 #define SYM_VAL(SYM) \
163 ((SYM)->root.u.def.section->output_section->vma \
164 + (SYM)->root.u.def.section->output_offset \
165 + (SYM)->root.u.def.value)
166 \f
167 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
168
169 static reloc_howto_type ppc_elf_howto_raw[] = {
170 /* This reloc does nothing. */
171 HOWTO (R_PPC_NONE, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 32, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_bitfield, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_PPC_NONE", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A standard 32 bit relocation. */
186 HOWTO (R_PPC_ADDR32, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC_ADDR32", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0xffffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* An absolute 26 bit branch; the lower two bits must be zero.
201 FIXME: we don't check that, we just clear them. */
202 HOWTO (R_PPC_ADDR24, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 26, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR24", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0x3fffffc, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* A standard 16 bit relocation. */
217 HOWTO (R_PPC_ADDR16, /* type */
218 0, /* rightshift */
219 1, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC_ADDR16", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0xffff, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A 16 bit relocation without overflow. */
232 HOWTO (R_PPC_ADDR16_LO, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_dont,/* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC_ADDR16_LO", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* The high order 16 bits of an address. */
247 HOWTO (R_PPC_ADDR16_HI, /* type */
248 16, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC_ADDR16_HI", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* The high order 16 bits of an address, plus 1 if the contents of
262 the low 16 bits, treated as a signed number, is negative. */
263 HOWTO (R_PPC_ADDR16_HA, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 ppc_elf_addr16_ha_reloc, /* special_function */
271 "R_PPC_ADDR16_HA", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* An absolute 16 bit branch; the lower two bits must be zero.
278 FIXME: we don't check that, we just clear them. */
279 HOWTO (R_PPC_ADDR14, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_bitfield, /* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC_ADDR14", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xfffc, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch, for which bit 10 should be set to
294 indicate that the branch is expected to be taken. The lower two
295 bits must be zero. */
296 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14_BRTAKEN",/* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is not expected to be taken. The lower
312 two bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRNTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A relative 26 bit branch; the lower two bits must be zero. */
328 HOWTO (R_PPC_REL24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 26, /* bitsize */
332 TRUE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_signed, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_PPC_REL24", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x3fffffc, /* dst_mask */
340 TRUE), /* pcrel_offset */
341
342 /* A relative 16 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC_REL14, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC_REL14", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0xfffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch. Bit 10 should be set to indicate that
358 the branch is expected to be taken. The lower two bits must be
359 zero. */
360 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14_BRTAKEN", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is not expected to be taken. The lower two bits must
376 be zero. */
377 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRNTAKEN",/* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
392 symbol. */
393 HOWTO (R_PPC_GOT16, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_GOT16", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
408 the symbol. */
409 HOWTO (R_PPC_GOT16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_bitfield, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_GOT16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_REL24, but referring to the procedure linkage table
456 entry for the symbol. */
457 HOWTO (R_PPC_PLTREL24, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 26, /* bitsize */
461 TRUE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_PLTREL24", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0x3fffffc, /* dst_mask */
469 TRUE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC_COPY, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 32, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC_ADDR32, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC_GLOB_DAT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Marks a procedure linkage table entry for a symbol. */
507 HOWTO (R_PPC_JMP_SLOT, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 longword is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC_RELATIVE, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC_REL24, but uses the value of the symbol within the
539 object rather than the final value. Normally used for
540 _GLOBAL_OFFSET_TABLE_. */
541 HOWTO (R_PPC_LOCAL24PC, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 26, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_signed, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_LOCAL24PC", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0x3fffffc, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 /* Like R_PPC_ADDR32, but may be unaligned. */
556 HOWTO (R_PPC_UADDR32, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 32, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_UADDR32", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffffffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but may be unaligned. */
571 HOWTO (R_PPC_UADDR16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_UADDR16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* 32-bit PC relative */
586 HOWTO (R_PPC_REL32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* 32-bit relocation to the symbol's procedure linkage table.
601 FIXME: not supported. */
602 HOWTO (R_PPC_PLT32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_PLT32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLTREL32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 TRUE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLTREL32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 TRUE), /* pcrel_offset */
631
632 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC_PLT16_LO, /* type */
635 0, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLT16_LO", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_HI, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_bitfield, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_HI", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HA, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc_elf_addr16_ha_reloc, /* special_function */
674 "R_PPC_PLT16_HA", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
681 small data items. */
682 HOWTO (R_PPC_SDAREL16, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_signed, /* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_PPC_SDAREL16", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_PPC_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit lower half section relative relocation. */
712 HOWTO (R_PPC_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_PPC_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_bitfield, /* complain_on_overflow */
749 ppc_elf_addr16_ha_reloc, /* special_function */
750 "R_PPC_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Marker reloc for TLS. */
757 HOWTO (R_PPC_TLS,
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 32, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC_TLS", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 /* Computes the load module index of the load module that contains the
772 definition of its TLS sym. */
773 HOWTO (R_PPC_DTPMOD32,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 ppc_elf_unhandled_reloc, /* special_function */
781 "R_PPC_DTPMOD32", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0xffffffff, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* Computes a dtv-relative displacement, the difference between the value
788 of sym+add and the base address of the thread-local storage block that
789 contains the definition of sym, minus 0x8000. */
790 HOWTO (R_PPC_DTPREL32,
791 0, /* rightshift */
792 2, /* size (0 = byte, 1 = short, 2 = long) */
793 32, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 ppc_elf_unhandled_reloc, /* special_function */
798 "R_PPC_DTPREL32", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffffffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* A 16 bit dtprel reloc. */
805 HOWTO (R_PPC_DTPREL16,
806 0, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_signed, /* complain_on_overflow */
812 ppc_elf_unhandled_reloc, /* special_function */
813 "R_PPC_DTPREL16", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Like DTPREL16, but no overflow. */
820 HOWTO (R_PPC_DTPREL16_LO,
821 0, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 ppc_elf_unhandled_reloc, /* special_function */
828 "R_PPC_DTPREL16_LO", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* Like DTPREL16_LO, but next higher group of 16 bits. */
835 HOWTO (R_PPC_DTPREL16_HI,
836 16, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL16_HI", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like DTPREL16_HI, but adjust for low 16 bits. */
850 HOWTO (R_PPC_DTPREL16_HA,
851 16, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16_HA", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Computes a tp-relative displacement, the difference between the value of
865 sym+add and the value of the thread pointer (r13). */
866 HOWTO (R_PPC_TPREL32,
867 0, /* rightshift */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
869 32, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc_elf_unhandled_reloc, /* special_function */
874 "R_PPC_TPREL32", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 0xffffffff, /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 /* A 16 bit tprel reloc. */
881 HOWTO (R_PPC_TPREL16,
882 0, /* rightshift */
883 1, /* size (0 = byte, 1 = short, 2 = long) */
884 16, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_signed, /* complain_on_overflow */
888 ppc_elf_unhandled_reloc, /* special_function */
889 "R_PPC_TPREL16", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 0xffff, /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* Like TPREL16, but no overflow. */
896 HOWTO (R_PPC_TPREL16_LO,
897 0, /* rightshift */
898 1, /* size (0 = byte, 1 = short, 2 = long) */
899 16, /* bitsize */
900 FALSE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont, /* complain_on_overflow */
903 ppc_elf_unhandled_reloc, /* special_function */
904 "R_PPC_TPREL16_LO", /* name */
905 FALSE, /* partial_inplace */
906 0, /* src_mask */
907 0xffff, /* dst_mask */
908 FALSE), /* pcrel_offset */
909
910 /* Like TPREL16_LO, but next higher group of 16 bits. */
911 HOWTO (R_PPC_TPREL16_HI,
912 16, /* rightshift */
913 1, /* size (0 = byte, 1 = short, 2 = long) */
914 16, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL16_HI", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* Like TPREL16_HI, but adjust for low 16 bits. */
926 HOWTO (R_PPC_TPREL16_HA,
927 16, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_dont, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16_HA", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
941 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
942 to the first entry. */
943 HOWTO (R_PPC_GOT_TLSGD16,
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_signed, /* complain_on_overflow */
950 ppc_elf_unhandled_reloc, /* special_function */
951 "R_PPC_GOT_TLSGD16", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* Like GOT_TLSGD16, but no overflow. */
958 HOWTO (R_PPC_GOT_TLSGD16_LO,
959 0, /* rightshift */
960 1, /* size (0 = byte, 1 = short, 2 = long) */
961 16, /* bitsize */
962 FALSE, /* pc_relative */
963 0, /* bitpos */
964 complain_overflow_dont, /* complain_on_overflow */
965 ppc_elf_unhandled_reloc, /* special_function */
966 "R_PPC_GOT_TLSGD16_LO", /* name */
967 FALSE, /* partial_inplace */
968 0, /* src_mask */
969 0xffff, /* dst_mask */
970 FALSE), /* pcrel_offset */
971
972 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
973 HOWTO (R_PPC_GOT_TLSGD16_HI,
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont, /* complain_on_overflow */
980 ppc_elf_unhandled_reloc, /* special_function */
981 "R_PPC_GOT_TLSGD16_HI", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
988 HOWTO (R_PPC_GOT_TLSGD16_HA,
989 16, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16_HA", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1003 with values (sym+add)@dtpmod and zero, and computes the offset to the
1004 first entry. */
1005 HOWTO (R_PPC_GOT_TLSLD16,
1006 0, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_signed, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_GOT_TLSLD16", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Like GOT_TLSLD16, but no overflow. */
1020 HOWTO (R_PPC_GOT_TLSLD16_LO,
1021 0, /* rightshift */
1022 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 16, /* bitsize */
1024 FALSE, /* pc_relative */
1025 0, /* bitpos */
1026 complain_overflow_dont, /* complain_on_overflow */
1027 ppc_elf_unhandled_reloc, /* special_function */
1028 "R_PPC_GOT_TLSLD16_LO", /* name */
1029 FALSE, /* partial_inplace */
1030 0, /* src_mask */
1031 0xffff, /* dst_mask */
1032 FALSE), /* pcrel_offset */
1033
1034 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1035 HOWTO (R_PPC_GOT_TLSLD16_HI,
1036 16, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc_elf_unhandled_reloc, /* special_function */
1043 "R_PPC_GOT_TLSLD16_HI", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1050 HOWTO (R_PPC_GOT_TLSLD16_HA,
1051 16, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16_HA", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1065 the offset to the entry. */
1066 HOWTO (R_PPC_GOT_DTPREL16,
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc_elf_unhandled_reloc, /* special_function */
1074 "R_PPC_GOT_DTPREL16", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like GOT_DTPREL16, but no overflow. */
1081 HOWTO (R_PPC_GOT_DTPREL16_LO,
1082 0, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_dont, /* complain_on_overflow */
1088 ppc_elf_unhandled_reloc, /* special_function */
1089 "R_PPC_GOT_DTPREL16_LO", /* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xffff, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1096 HOWTO (R_PPC_GOT_DTPREL16_HI,
1097 16, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_dont, /* complain_on_overflow */
1103 ppc_elf_unhandled_reloc, /* special_function */
1104 "R_PPC_GOT_DTPREL16_HI", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xffff, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1111 HOWTO (R_PPC_GOT_DTPREL16_HA,
1112 16, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16_HA", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1126 offset to the entry. */
1127 HOWTO (R_PPC_GOT_TPREL16,
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 ppc_elf_unhandled_reloc, /* special_function */
1135 "R_PPC_GOT_TPREL16", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xffff, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like GOT_TPREL16, but no overflow. */
1142 HOWTO (R_PPC_GOT_TPREL16_LO,
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont, /* complain_on_overflow */
1149 ppc_elf_unhandled_reloc, /* special_function */
1150 "R_PPC_GOT_TPREL16_LO", /* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xffff, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1157 HOWTO (R_PPC_GOT_TPREL16_HI,
1158 16, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc_elf_unhandled_reloc, /* special_function */
1165 "R_PPC_GOT_TPREL16_HI", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xffff, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1172 HOWTO (R_PPC_GOT_TPREL16_HA,
1173 16, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16_HA", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* The remaining relocs are from the Embedded ELF ABI, and are not
1187 in the SVR4 ELF ABI. */
1188
1189 /* 32 bit value resulting from the addend minus the symbol. */
1190 HOWTO (R_PPC_EMB_NADDR32, /* type */
1191 0, /* rightshift */
1192 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 32, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_bitfield, /* complain_on_overflow */
1197 bfd_elf_generic_reloc, /* special_function */
1198 "R_PPC_EMB_NADDR32", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffffffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* 16 bit value resulting from the addend minus the symbol. */
1205 HOWTO (R_PPC_EMB_NADDR16, /* type */
1206 0, /* rightshift */
1207 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 16, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_bitfield, /* complain_on_overflow */
1212 bfd_elf_generic_reloc, /* special_function */
1213 "R_PPC_EMB_NADDR16", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0xffff, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 /* 16 bit value resulting from the addend minus the symbol. */
1220 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_dont,/* complain_on_overflow */
1227 bfd_elf_generic_reloc, /* special_function */
1228 "R_PPC_EMB_ADDR16_LO", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xffff, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* The high order 16 bits of the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1236 16, /* rightshift */
1237 1, /* size (0 = byte, 1 = short, 2 = long) */
1238 16, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR16_HI", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* The high order 16 bits of the result of the addend minus the address,
1250 plus 1 if the contents of the low 16 bits, treated as a signed number,
1251 is negative. */
1252 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1253 16, /* rightshift */
1254 1, /* size (0 = byte, 1 = short, 2 = long) */
1255 16, /* bitsize */
1256 FALSE, /* pc_relative */
1257 0, /* bitpos */
1258 complain_overflow_dont, /* complain_on_overflow */
1259 ppc_elf_addr16_ha_reloc, /* special_function */
1260 "R_PPC_EMB_NADDR16_HA", /* name */
1261 FALSE, /* partial_inplace */
1262 0, /* src_mask */
1263 0xffff, /* dst_mask */
1264 FALSE), /* pcrel_offset */
1265
1266 /* 16 bit value resulting from allocating a 4 byte word to hold an
1267 address in the .sdata section, and returning the offset from
1268 _SDA_BASE_ for that relocation. */
1269 HOWTO (R_PPC_EMB_SDAI16, /* type */
1270 0, /* rightshift */
1271 1, /* size (0 = byte, 1 = short, 2 = long) */
1272 16, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_bitfield, /* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_PPC_EMB_SDAI16", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from allocating a 4 byte word to hold an
1284 address in the .sdata2 section, and returning the offset from
1285 _SDA2_BASE_ for that relocation. */
1286 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1287 0, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_bitfield, /* complain_on_overflow */
1293 bfd_elf_generic_reloc, /* special_function */
1294 "R_PPC_EMB_SDA2I16", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1301 small data items. */
1302 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1303 0, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_signed, /* complain_on_overflow */
1309 bfd_elf_generic_reloc, /* special_function */
1310 "R_PPC_EMB_SDA2REL", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1317 signed offset from the appropriate base, and filling in the register
1318 field with the appropriate register (0, 2, or 13). */
1319 HOWTO (R_PPC_EMB_SDA21, /* type */
1320 0, /* rightshift */
1321 2, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 bfd_elf_generic_reloc, /* special_function */
1327 "R_PPC_EMB_SDA21", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Relocation not handled: R_PPC_EMB_MRKREF */
1334 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1335 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1336 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1337 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1338 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1339
1340 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1341 in the 16 bit signed offset from the appropriate base, and filling in the
1342 register field with the appropriate register (0, 2, or 13). */
1343 HOWTO (R_PPC_EMB_RELSDA, /* type */
1344 0, /* rightshift */
1345 1, /* size (0 = byte, 1 = short, 2 = long) */
1346 16, /* bitsize */
1347 TRUE, /* pc_relative */
1348 0, /* bitpos */
1349 complain_overflow_signed, /* complain_on_overflow */
1350 bfd_elf_generic_reloc, /* special_function */
1351 "R_PPC_EMB_RELSDA", /* name */
1352 FALSE, /* partial_inplace */
1353 0, /* src_mask */
1354 0xffff, /* dst_mask */
1355 FALSE), /* pcrel_offset */
1356
1357 /* A 16 bit relative relocation. */
1358 HOWTO (R_PPC_REL16, /* type */
1359 0, /* rightshift */
1360 1, /* size (0 = byte, 1 = short, 2 = long) */
1361 16, /* bitsize */
1362 TRUE, /* pc_relative */
1363 0, /* bitpos */
1364 complain_overflow_bitfield, /* complain_on_overflow */
1365 bfd_elf_generic_reloc, /* special_function */
1366 "R_PPC_REL16", /* name */
1367 FALSE, /* partial_inplace */
1368 0, /* src_mask */
1369 0xffff, /* dst_mask */
1370 TRUE), /* pcrel_offset */
1371
1372 /* A 16 bit relative relocation without overflow. */
1373 HOWTO (R_PPC_REL16_LO, /* type */
1374 0, /* rightshift */
1375 1, /* size (0 = byte, 1 = short, 2 = long) */
1376 16, /* bitsize */
1377 TRUE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_PPC_REL16_LO", /* name */
1382 FALSE, /* partial_inplace */
1383 0, /* src_mask */
1384 0xffff, /* dst_mask */
1385 TRUE), /* pcrel_offset */
1386
1387 /* The high order 16 bits of a relative address. */
1388 HOWTO (R_PPC_REL16_HI, /* type */
1389 16, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 TRUE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_dont, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_REL16_HI", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 TRUE), /* pcrel_offset */
1401
1402 /* The high order 16 bits of a relative address, plus 1 if the contents of
1403 the low 16 bits, treated as a signed number, is negative. */
1404 HOWTO (R_PPC_REL16_HA, /* type */
1405 16, /* rightshift */
1406 1, /* size (0 = byte, 1 = short, 2 = long) */
1407 16, /* bitsize */
1408 TRUE, /* pc_relative */
1409 0, /* bitpos */
1410 complain_overflow_dont, /* complain_on_overflow */
1411 ppc_elf_addr16_ha_reloc, /* special_function */
1412 "R_PPC_REL16_HA", /* name */
1413 FALSE, /* partial_inplace */
1414 0, /* src_mask */
1415 0xffff, /* dst_mask */
1416 TRUE), /* pcrel_offset */
1417
1418 /* GNU extension to record C++ vtable hierarchy. */
1419 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1420 0, /* rightshift */
1421 0, /* size (0 = byte, 1 = short, 2 = long) */
1422 0, /* bitsize */
1423 FALSE, /* pc_relative */
1424 0, /* bitpos */
1425 complain_overflow_dont, /* complain_on_overflow */
1426 NULL, /* special_function */
1427 "R_PPC_GNU_VTINHERIT", /* name */
1428 FALSE, /* partial_inplace */
1429 0, /* src_mask */
1430 0, /* dst_mask */
1431 FALSE), /* pcrel_offset */
1432
1433 /* GNU extension to record C++ vtable member usage. */
1434 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1435 0, /* rightshift */
1436 0, /* size (0 = byte, 1 = short, 2 = long) */
1437 0, /* bitsize */
1438 FALSE, /* pc_relative */
1439 0, /* bitpos */
1440 complain_overflow_dont, /* complain_on_overflow */
1441 NULL, /* special_function */
1442 "R_PPC_GNU_VTENTRY", /* name */
1443 FALSE, /* partial_inplace */
1444 0, /* src_mask */
1445 0, /* dst_mask */
1446 FALSE), /* pcrel_offset */
1447
1448 /* Phony reloc to handle AIX style TOC entries. */
1449 HOWTO (R_PPC_TOC16, /* type */
1450 0, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_signed, /* complain_on_overflow */
1456 bfd_elf_generic_reloc, /* special_function */
1457 "R_PPC_TOC16", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462 };
1463 \f
1464 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1465
1466 static void
1467 ppc_elf_howto_init (void)
1468 {
1469 unsigned int i, type;
1470
1471 for (i = 0;
1472 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1473 i++)
1474 {
1475 type = ppc_elf_howto_raw[i].type;
1476 if (type >= (sizeof (ppc_elf_howto_table)
1477 / sizeof (ppc_elf_howto_table[0])))
1478 abort ();
1479 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1480 }
1481 }
1482
1483 static reloc_howto_type *
1484 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1485 bfd_reloc_code_real_type code)
1486 {
1487 enum elf_ppc_reloc_type r;
1488
1489 /* Initialize howto table if not already done. */
1490 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1491 ppc_elf_howto_init ();
1492
1493 switch (code)
1494 {
1495 default:
1496 return NULL;
1497
1498 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1499 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1500 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1501 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1502 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1503 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1504 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1505 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1506 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1507 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1508 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1509 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1510 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1511 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1512 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1513 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1514 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1515 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1516 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1517 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1518 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1519 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1520 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1521 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1522 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1523 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1524 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1525 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1526 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1527 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1528 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1529 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1530 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1531 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1532 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1533 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1534 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1535 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1536 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1537 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1538 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1539 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1540 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1541 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1542 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1543 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1544 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1545 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1546 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1549 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1550 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1551 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1552 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1553 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1554 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1555 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1556 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1557 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1558 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1559 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1560 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1561 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1562 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1563 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1564 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1565 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1566 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1567 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1568 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1569 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1570 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1571 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1572 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1573 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1574 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1575 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1576 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1577 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1578 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1579 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1580 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1581 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1582 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1583 }
1584
1585 return ppc_elf_howto_table[r];
1586 };
1587
1588 static reloc_howto_type *
1589 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1590 const char *r_name)
1591 {
1592 unsigned int i;
1593
1594 for (i = 0;
1595 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1596 i++)
1597 if (ppc_elf_howto_raw[i].name != NULL
1598 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1599 return &ppc_elf_howto_raw[i];
1600
1601 return NULL;
1602 }
1603
1604 /* Set the howto pointer for a PowerPC ELF reloc. */
1605
1606 static void
1607 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1608 arelent *cache_ptr,
1609 Elf_Internal_Rela *dst)
1610 {
1611 /* Initialize howto table if not already done. */
1612 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1613 ppc_elf_howto_init ();
1614
1615 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1616 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1617
1618 /* Just because the above assert didn't trigger doesn't mean that
1619 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1620 if (!cache_ptr->howto)
1621 {
1622 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1623 abfd, ELF32_R_TYPE (dst->r_info));
1624 bfd_set_error (bfd_error_bad_value);
1625
1626 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1627 }
1628 }
1629
1630 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1631
1632 static bfd_reloc_status_type
1633 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1634 arelent *reloc_entry,
1635 asymbol *symbol,
1636 void *data ATTRIBUTE_UNUSED,
1637 asection *input_section,
1638 bfd *output_bfd,
1639 char **error_message ATTRIBUTE_UNUSED)
1640 {
1641 bfd_vma relocation;
1642
1643 if (output_bfd != NULL)
1644 {
1645 reloc_entry->address += input_section->output_offset;
1646 return bfd_reloc_ok;
1647 }
1648
1649 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1650 return bfd_reloc_outofrange;
1651
1652 if (bfd_is_com_section (symbol->section))
1653 relocation = 0;
1654 else
1655 relocation = symbol->value;
1656
1657 relocation += symbol->section->output_section->vma;
1658 relocation += symbol->section->output_offset;
1659 relocation += reloc_entry->addend;
1660 if (reloc_entry->howto->pc_relative)
1661 relocation -= reloc_entry->address;
1662
1663 reloc_entry->addend += (relocation & 0x8000) << 1;
1664
1665 return bfd_reloc_continue;
1666 }
1667
1668 static bfd_reloc_status_type
1669 ppc_elf_unhandled_reloc (bfd *abfd,
1670 arelent *reloc_entry,
1671 asymbol *symbol,
1672 void *data,
1673 asection *input_section,
1674 bfd *output_bfd,
1675 char **error_message)
1676 {
1677 /* If this is a relocatable link (output_bfd test tells us), just
1678 call the generic function. Any adjustment will be done at final
1679 link time. */
1680 if (output_bfd != NULL)
1681 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1682 input_section, output_bfd, error_message);
1683
1684 if (error_message != NULL)
1685 {
1686 static char buf[60];
1687 sprintf (buf, _("generic linker can't handle %s"),
1688 reloc_entry->howto->name);
1689 *error_message = buf;
1690 }
1691 return bfd_reloc_dangerous;
1692 }
1693 \f
1694 /* Sections created by the linker. */
1695
1696 typedef struct elf_linker_section
1697 {
1698 /* Pointer to the bfd section. */
1699 asection *section;
1700 /* Section name. */
1701 const char *name;
1702 /* Associated bss section name. */
1703 const char *bss_name;
1704 /* Associated symbol name. */
1705 const char *sym_name;
1706 /* Associated symbol. */
1707 struct elf_link_hash_entry *sym;
1708 } elf_linker_section_t;
1709
1710 /* Linked list of allocated pointer entries. This hangs off of the
1711 symbol lists, and provides allows us to return different pointers,
1712 based on different addend's. */
1713
1714 typedef struct elf_linker_section_pointers
1715 {
1716 /* next allocated pointer for this symbol */
1717 struct elf_linker_section_pointers *next;
1718 /* offset of pointer from beginning of section */
1719 bfd_vma offset;
1720 /* addend used */
1721 bfd_vma addend;
1722 /* which linker section this is */
1723 elf_linker_section_t *lsect;
1724 } elf_linker_section_pointers_t;
1725
1726 struct ppc_elf_obj_tdata
1727 {
1728 struct elf_obj_tdata elf;
1729
1730 /* A mapping from local symbols to offsets into the various linker
1731 sections added. This is index by the symbol index. */
1732 elf_linker_section_pointers_t **linker_section_pointers;
1733
1734 /* Flags used to auto-detect plt type. */
1735 unsigned int makes_plt_call : 1;
1736 unsigned int has_rel16 : 1;
1737 };
1738
1739 #define ppc_elf_tdata(bfd) \
1740 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1741
1742 #define elf_local_ptr_offsets(bfd) \
1743 (ppc_elf_tdata (bfd)->linker_section_pointers)
1744
1745 #define is_ppc_elf(bfd) \
1746 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1747 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1748
1749 /* Override the generic function because we store some extras. */
1750
1751 static bfd_boolean
1752 ppc_elf_mkobject (bfd *abfd)
1753 {
1754 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1755 PPC32_ELF_TDATA);
1756 }
1757
1758 /* Fix bad default arch selected for a 32 bit input bfd when the
1759 default is 64 bit. */
1760
1761 static bfd_boolean
1762 ppc_elf_object_p (bfd *abfd)
1763 {
1764 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1765 {
1766 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1767
1768 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1769 {
1770 /* Relies on arch after 64 bit default being 32 bit default. */
1771 abfd->arch_info = abfd->arch_info->next;
1772 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1773 }
1774 }
1775 return TRUE;
1776 }
1777
1778 /* Function to set whether a module needs the -mrelocatable bit set. */
1779
1780 static bfd_boolean
1781 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1782 {
1783 BFD_ASSERT (!elf_flags_init (abfd)
1784 || elf_elfheader (abfd)->e_flags == flags);
1785
1786 elf_elfheader (abfd)->e_flags = flags;
1787 elf_flags_init (abfd) = TRUE;
1788 return TRUE;
1789 }
1790
1791 /* Support for core dump NOTE sections. */
1792
1793 static bfd_boolean
1794 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1795 {
1796 int offset;
1797 unsigned int size;
1798
1799 switch (note->descsz)
1800 {
1801 default:
1802 return FALSE;
1803
1804 case 268: /* Linux/PPC. */
1805 /* pr_cursig */
1806 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1807
1808 /* pr_pid */
1809 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1810
1811 /* pr_reg */
1812 offset = 72;
1813 size = 192;
1814
1815 break;
1816 }
1817
1818 /* Make a ".reg/999" section. */
1819 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1820 size, note->descpos + offset);
1821 }
1822
1823 static bfd_boolean
1824 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1825 {
1826 switch (note->descsz)
1827 {
1828 default:
1829 return FALSE;
1830
1831 case 128: /* Linux/PPC elf_prpsinfo. */
1832 elf_tdata (abfd)->core_program
1833 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1834 elf_tdata (abfd)->core_command
1835 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1836 }
1837
1838 /* Note that for some reason, a spurious space is tacked
1839 onto the end of the args in some (at least one anyway)
1840 implementations, so strip it off if it exists. */
1841
1842 {
1843 char *command = elf_tdata (abfd)->core_command;
1844 int n = strlen (command);
1845
1846 if (0 < n && command[n - 1] == ' ')
1847 command[n - 1] = '\0';
1848 }
1849
1850 return TRUE;
1851 }
1852
1853 static char *
1854 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1855 {
1856 switch (note_type)
1857 {
1858 default:
1859 return NULL;
1860
1861 case NT_PRPSINFO:
1862 {
1863 char data[128];
1864 va_list ap;
1865
1866 va_start (ap, note_type);
1867 memset (data, 0, 32);
1868 strncpy (data + 32, va_arg (ap, const char *), 16);
1869 strncpy (data + 48, va_arg (ap, const char *), 80);
1870 va_end (ap);
1871 return elfcore_write_note (abfd, buf, bufsiz,
1872 "CORE", note_type, data, sizeof (data));
1873 }
1874
1875 case NT_PRSTATUS:
1876 {
1877 char data[268];
1878 va_list ap;
1879 long pid;
1880 int cursig;
1881 const void *greg;
1882
1883 va_start (ap, note_type);
1884 memset (data, 0, 72);
1885 pid = va_arg (ap, long);
1886 bfd_put_32 (abfd, pid, data + 24);
1887 cursig = va_arg (ap, int);
1888 bfd_put_16 (abfd, cursig, data + 12);
1889 greg = va_arg (ap, const void *);
1890 memcpy (data + 72, greg, 192);
1891 memset (data + 264, 0, 4);
1892 va_end (ap);
1893 return elfcore_write_note (abfd, buf, bufsiz,
1894 "CORE", note_type, data, sizeof (data));
1895 }
1896 }
1897 }
1898
1899 /* Return address for Ith PLT stub in section PLT, for relocation REL
1900 or (bfd_vma) -1 if it should not be included. */
1901
1902 static bfd_vma
1903 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1904 const asection *plt ATTRIBUTE_UNUSED,
1905 const arelent *rel)
1906 {
1907 return rel->address;
1908 }
1909
1910 /* Handle a PowerPC specific section when reading an object file. This
1911 is called when bfd_section_from_shdr finds a section with an unknown
1912 type. */
1913
1914 static bfd_boolean
1915 ppc_elf_section_from_shdr (bfd *abfd,
1916 Elf_Internal_Shdr *hdr,
1917 const char *name,
1918 int shindex)
1919 {
1920 asection *newsect;
1921 flagword flags;
1922
1923 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1924 return FALSE;
1925
1926 newsect = hdr->bfd_section;
1927 flags = bfd_get_section_flags (abfd, newsect);
1928 if (hdr->sh_flags & SHF_EXCLUDE)
1929 flags |= SEC_EXCLUDE;
1930
1931 if (hdr->sh_type == SHT_ORDERED)
1932 flags |= SEC_SORT_ENTRIES;
1933
1934 bfd_set_section_flags (abfd, newsect, flags);
1935 return TRUE;
1936 }
1937
1938 /* Set up any other section flags and such that may be necessary. */
1939
1940 static bfd_boolean
1941 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1942 Elf_Internal_Shdr *shdr,
1943 asection *asect)
1944 {
1945 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1946 shdr->sh_flags |= SHF_EXCLUDE;
1947
1948 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1949 shdr->sh_type = SHT_ORDERED;
1950
1951 return TRUE;
1952 }
1953
1954 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1955 need to bump up the number of section headers. */
1956
1957 static int
1958 ppc_elf_additional_program_headers (bfd *abfd,
1959 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1960 {
1961 asection *s;
1962 int ret = 0;
1963
1964 s = bfd_get_section_by_name (abfd, ".sbss2");
1965 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1966 ++ret;
1967
1968 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1969 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1970 ++ret;
1971
1972 return ret;
1973 }
1974
1975 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1976 .PPC.EMB.sbss0 a normal section, and not a bss section so
1977 that the linker doesn't crater when trying to make more than
1978 2 sections. */
1979
1980 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1981 {
1982 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1983 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1984 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1985 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1986 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1987 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1988 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1989 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1990 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1991 { NULL, 0, 0, 0, 0 }
1992 };
1993
1994 /* This is what we want for new plt/got. */
1995 static struct bfd_elf_special_section ppc_alt_plt =
1996 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1997
1998 static const struct bfd_elf_special_section *
1999 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2000 {
2001 const struct bfd_elf_special_section *ssect;
2002
2003 /* See if this is one of the special sections. */
2004 if (sec->name == NULL)
2005 return NULL;
2006
2007 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2008 sec->use_rela_p);
2009 if (ssect != NULL)
2010 {
2011 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2012 ssect = &ppc_alt_plt;
2013 return ssect;
2014 }
2015
2016 return _bfd_elf_get_sec_type_attr (abfd, sec);
2017 }
2018 \f
2019 /* Very simple linked list structure for recording apuinfo values. */
2020 typedef struct apuinfo_list
2021 {
2022 struct apuinfo_list *next;
2023 unsigned long value;
2024 }
2025 apuinfo_list;
2026
2027 static apuinfo_list *head;
2028
2029
2030 static void
2031 apuinfo_list_init (void)
2032 {
2033 head = NULL;
2034 }
2035
2036 static void
2037 apuinfo_list_add (unsigned long value)
2038 {
2039 apuinfo_list *entry = head;
2040
2041 while (entry != NULL)
2042 {
2043 if (entry->value == value)
2044 return;
2045 entry = entry->next;
2046 }
2047
2048 entry = bfd_malloc (sizeof (* entry));
2049 if (entry == NULL)
2050 return;
2051
2052 entry->value = value;
2053 entry->next = head;
2054 head = entry;
2055 }
2056
2057 static unsigned
2058 apuinfo_list_length (void)
2059 {
2060 apuinfo_list *entry;
2061 unsigned long count;
2062
2063 for (entry = head, count = 0;
2064 entry;
2065 entry = entry->next)
2066 ++ count;
2067
2068 return count;
2069 }
2070
2071 static inline unsigned long
2072 apuinfo_list_element (unsigned long number)
2073 {
2074 apuinfo_list * entry;
2075
2076 for (entry = head;
2077 entry && number --;
2078 entry = entry->next)
2079 ;
2080
2081 return entry ? entry->value : 0;
2082 }
2083
2084 static void
2085 apuinfo_list_finish (void)
2086 {
2087 apuinfo_list *entry;
2088
2089 for (entry = head; entry;)
2090 {
2091 apuinfo_list *next = entry->next;
2092 free (entry);
2093 entry = next;
2094 }
2095
2096 head = NULL;
2097 }
2098
2099 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2100 #define APUINFO_LABEL "APUinfo"
2101
2102 /* Scan the input BFDs and create a linked list of
2103 the APUinfo values that will need to be emitted. */
2104
2105 static void
2106 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2107 {
2108 bfd *ibfd;
2109 asection *asec;
2110 char *buffer;
2111 unsigned num_input_sections;
2112 bfd_size_type output_section_size;
2113 unsigned i;
2114 unsigned num_entries;
2115 unsigned long offset;
2116 unsigned long length;
2117 const char *error_message = NULL;
2118
2119 if (link_info == NULL)
2120 return;
2121
2122 /* Scan the input bfds, looking for apuinfo sections. */
2123 num_input_sections = 0;
2124 output_section_size = 0;
2125
2126 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2127 {
2128 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2129 if (asec)
2130 {
2131 ++ num_input_sections;
2132 output_section_size += asec->size;
2133 }
2134 }
2135
2136 /* We need at least one input sections
2137 in order to make merging worthwhile. */
2138 if (num_input_sections < 1)
2139 return;
2140
2141 /* Just make sure that the output section exists as well. */
2142 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2143 if (asec == NULL)
2144 return;
2145
2146 /* Allocate a buffer for the contents of the input sections. */
2147 buffer = bfd_malloc (output_section_size);
2148 if (buffer == NULL)
2149 return;
2150
2151 offset = 0;
2152 apuinfo_list_init ();
2153
2154 /* Read in the input sections contents. */
2155 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2156 {
2157 unsigned long datum;
2158 char *ptr;
2159
2160 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2161 if (asec == NULL)
2162 continue;
2163
2164 length = asec->size;
2165 if (length < 24)
2166 {
2167 error_message = _("corrupt or empty %s section in %B");
2168 goto fail;
2169 }
2170
2171 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2172 || (bfd_bread (buffer + offset, length, ibfd) != length))
2173 {
2174 error_message = _("unable to read in %s section from %B");
2175 goto fail;
2176 }
2177
2178 /* Process the contents of the section. */
2179 ptr = buffer + offset;
2180 error_message = _("corrupt %s section in %B");
2181
2182 /* Verify the contents of the header. Note - we have to
2183 extract the values this way in order to allow for a
2184 host whose endian-ness is different from the target. */
2185 datum = bfd_get_32 (ibfd, ptr);
2186 if (datum != sizeof APUINFO_LABEL)
2187 goto fail;
2188
2189 datum = bfd_get_32 (ibfd, ptr + 8);
2190 if (datum != 0x2)
2191 goto fail;
2192
2193 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2194 goto fail;
2195
2196 /* Get the number of bytes used for apuinfo entries. */
2197 datum = bfd_get_32 (ibfd, ptr + 4);
2198 if (datum + 20 != length)
2199 goto fail;
2200
2201 /* Make sure that we do not run off the end of the section. */
2202 if (offset + length > output_section_size)
2203 goto fail;
2204
2205 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2206 for (i = 0; i < datum; i += 4)
2207 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2208
2209 /* Update the offset. */
2210 offset += length;
2211 }
2212
2213 error_message = NULL;
2214
2215 /* Compute the size of the output section. */
2216 num_entries = apuinfo_list_length ();
2217 output_section_size = 20 + num_entries * 4;
2218
2219 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2220
2221 if (! bfd_set_section_size (abfd, asec, output_section_size))
2222 ibfd = abfd,
2223 error_message = _("warning: unable to set size of %s section in %B");
2224
2225 fail:
2226 free (buffer);
2227
2228 if (error_message)
2229 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2230 }
2231
2232 /* Prevent the output section from accumulating the input sections'
2233 contents. We have already stored this in our linked list structure. */
2234
2235 static bfd_boolean
2236 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2237 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2238 asection *asec,
2239 bfd_byte *contents ATTRIBUTE_UNUSED)
2240 {
2241 return (apuinfo_list_length ()
2242 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2243 }
2244
2245 /* Finally we can generate the output section. */
2246
2247 static void
2248 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2249 {
2250 bfd_byte *buffer;
2251 asection *asec;
2252 unsigned i;
2253 unsigned num_entries;
2254 bfd_size_type length;
2255
2256 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2257 if (asec == NULL)
2258 return;
2259
2260 if (apuinfo_list_length () == 0)
2261 return;
2262
2263 length = asec->size;
2264 if (length < 20)
2265 return;
2266
2267 buffer = bfd_malloc (length);
2268 if (buffer == NULL)
2269 {
2270 (*_bfd_error_handler)
2271 (_("failed to allocate space for new APUinfo section."));
2272 return;
2273 }
2274
2275 /* Create the apuinfo header. */
2276 num_entries = apuinfo_list_length ();
2277 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2278 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2279 bfd_put_32 (abfd, 0x2, buffer + 8);
2280 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2281
2282 length = 20;
2283 for (i = 0; i < num_entries; i++)
2284 {
2285 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2286 length += 4;
2287 }
2288
2289 if (length != asec->size)
2290 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2291
2292 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2293 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2294
2295 free (buffer);
2296
2297 apuinfo_list_finish ();
2298 }
2299 \f
2300 static bfd_boolean
2301 is_pic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2302 {
2303 bfd_byte buf[16];
2304 unsigned int insn;
2305
2306 if (!bfd_get_section_contents (abfd, glink, buf, off, 16))
2307 return FALSE;
2308
2309 insn = bfd_get_32 (abfd, buf);
2310 if ((insn & 0xffff0000) == LWZ_11_30
2311 && bfd_get_32 (abfd, buf + 4) == MTCTR_11
2312 && bfd_get_32 (abfd, buf + 8) == BCTR)
2313 return TRUE;
2314
2315 if ((insn & 0xffff0000) == ADDIS_11_30
2316 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2317 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2318 && bfd_get_32 (abfd, buf + 12) == BCTR)
2319 return TRUE;
2320 return FALSE;
2321 }
2322
2323 static bfd_boolean
2324 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2325 {
2326 bfd_vma vma = *(bfd_vma *) ptr;
2327 return ((section->flags & SEC_ALLOC) != 0
2328 && section->vma <= vma
2329 && vma < section->vma + section->size);
2330 }
2331
2332 static long
2333 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2334 long dynsymcount, asymbol **dynsyms,
2335 asymbol **ret)
2336 {
2337 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2338 asection *plt, *relplt, *dynamic, *glink;
2339 bfd_vma glink_vma = 0;
2340 bfd_vma resolv_vma = 0;
2341 bfd_vma stub_vma;
2342 asymbol *s;
2343 arelent *p;
2344 long count, i;
2345 size_t size;
2346 char *names;
2347 bfd_byte buf[4];
2348
2349 *ret = NULL;
2350
2351 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2352 return 0;
2353
2354 if (dynsymcount <= 0)
2355 return 0;
2356
2357 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2358 if (relplt == NULL)
2359 return 0;
2360
2361 plt = bfd_get_section_by_name (abfd, ".plt");
2362 if (plt == NULL)
2363 return 0;
2364
2365 /* Call common code to handle old-style executable PLTs. */
2366 if (elf_section_flags (plt) & SHF_EXECINSTR)
2367 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2368 dynsymcount, dynsyms, ret);
2369
2370 /* If this object was prelinked, the prelinker stored the address
2371 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2372 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2373 if (dynamic != NULL)
2374 {
2375 bfd_byte *dynbuf, *extdyn, *extdynend;
2376 size_t extdynsize;
2377 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2378
2379 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2380 return -1;
2381
2382 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2383 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2384
2385 extdyn = dynbuf;
2386 extdynend = extdyn + dynamic->size;
2387 for (; extdyn < extdynend; extdyn += extdynsize)
2388 {
2389 Elf_Internal_Dyn dyn;
2390 (*swap_dyn_in) (abfd, extdyn, &dyn);
2391
2392 if (dyn.d_tag == DT_NULL)
2393 break;
2394
2395 if (dyn.d_tag == DT_PPC_GOT)
2396 {
2397 unsigned int g_o_t = dyn.d_un.d_val;
2398 asection *got = bfd_get_section_by_name (abfd, ".got");
2399 if (got != NULL
2400 && bfd_get_section_contents (abfd, got, buf,
2401 g_o_t - got->vma + 4, 4))
2402 glink_vma = bfd_get_32 (abfd, buf);
2403 break;
2404 }
2405 }
2406 free (dynbuf);
2407 }
2408
2409 /* Otherwise we read the first plt entry. */
2410 if (glink_vma == 0)
2411 {
2412 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2413 glink_vma = bfd_get_32 (abfd, buf);
2414 }
2415
2416 if (glink_vma == 0)
2417 return 0;
2418
2419 /* The .glink section usually does not survive the final
2420 link; search for the section (usually .text) where the
2421 glink stubs now reside. */
2422 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2423 if (glink == NULL)
2424 return 0;
2425
2426 /* Determine glink PLT resolver by reading the relative branch
2427 from the first glink stub. */
2428 if (bfd_get_section_contents (abfd, glink, buf,
2429 glink_vma - glink->vma, 4))
2430 {
2431 unsigned int insn = bfd_get_32 (abfd, buf);
2432
2433 /* The first glink stub may either branch to the resolver ... */
2434 insn ^= B;
2435 if ((insn & ~0x3fffffc) == 0)
2436 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2437
2438 /* ... or fall through a bunch of NOPs. */
2439 else if ((insn ^ B ^ NOP) == 0)
2440 for (i = 4;
2441 bfd_get_section_contents (abfd, glink, buf,
2442 glink_vma - glink->vma + i, 4);
2443 i += 4)
2444 if (bfd_get_32 (abfd, buf) != NOP)
2445 {
2446 resolv_vma = glink_vma + i;
2447 break;
2448 }
2449 }
2450
2451 count = relplt->size / sizeof (Elf32_External_Rela);
2452 stub_vma = glink_vma - (bfd_vma) count * 16;
2453 /* If the stubs are those for -shared/-pie then we might have
2454 multiple stubs for each plt entry. If that is the case then
2455 there is no way to associate stubs with their plt entries short
2456 of figuring out the GOT pointer value used in the stub. */
2457 if (!bfd_get_section_contents (abfd, glink, buf,
2458 stub_vma - glink->vma, 4)
2459 || ((bfd_get_32 (abfd, buf) & 0xffff0000) != LIS_11
2460 && is_pic_glink_stub (abfd, glink, stub_vma - glink->vma - 16)))
2461 return 0;
2462
2463 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2464 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2465 return -1;
2466
2467 size = count * sizeof (asymbol);
2468 p = relplt->relocation;
2469 for (i = 0; i < count; i++, p++)
2470 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2471
2472 size += sizeof (asymbol) + sizeof ("__glink");
2473
2474 if (resolv_vma)
2475 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2476
2477 s = *ret = bfd_malloc (size);
2478 if (s == NULL)
2479 return -1;
2480
2481 names = (char *) (s + count + 1 + (resolv_vma != 0));
2482 p = relplt->relocation;
2483 for (i = 0; i < count; i++, p++)
2484 {
2485 size_t len;
2486
2487 *s = **p->sym_ptr_ptr;
2488 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2489 we are defining a symbol, ensure one of them is set. */
2490 if ((s->flags & BSF_LOCAL) == 0)
2491 s->flags |= BSF_GLOBAL;
2492 s->flags |= BSF_SYNTHETIC;
2493 s->section = glink;
2494 s->value = stub_vma - glink->vma;
2495 s->name = names;
2496 s->udata.p = NULL;
2497 len = strlen ((*p->sym_ptr_ptr)->name);
2498 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2499 names += len;
2500 memcpy (names, "@plt", sizeof ("@plt"));
2501 names += sizeof ("@plt");
2502 ++s;
2503 stub_vma += 16;
2504 }
2505
2506 /* Add a symbol at the start of the glink branch table. */
2507 memset (s, 0, sizeof *s);
2508 s->the_bfd = abfd;
2509 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2510 s->section = glink;
2511 s->value = glink_vma - glink->vma;
2512 s->name = names;
2513 memcpy (names, "__glink", sizeof ("__glink"));
2514 names += sizeof ("__glink");
2515 s++;
2516 count++;
2517
2518 if (resolv_vma)
2519 {
2520 /* Add a symbol for the glink PLT resolver. */
2521 memset (s, 0, sizeof *s);
2522 s->the_bfd = abfd;
2523 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2524 s->section = glink;
2525 s->value = resolv_vma - glink->vma;
2526 s->name = names;
2527 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2528 names += sizeof ("__glink_PLTresolve");
2529 s++;
2530 count++;
2531 }
2532
2533 return count;
2534 }
2535 \f
2536 /* The following functions are specific to the ELF linker, while
2537 functions above are used generally. They appear in this file more
2538 or less in the order in which they are called. eg.
2539 ppc_elf_check_relocs is called early in the link process,
2540 ppc_elf_finish_dynamic_sections is one of the last functions
2541 called. */
2542
2543 /* The PPC linker needs to keep track of the number of relocs that it
2544 decides to copy as dynamic relocs in check_relocs for each symbol.
2545 This is so that it can later discard them if they are found to be
2546 unnecessary. We store the information in a field extending the
2547 regular ELF linker hash table. */
2548
2549 struct ppc_elf_dyn_relocs
2550 {
2551 struct ppc_elf_dyn_relocs *next;
2552
2553 /* The input section of the reloc. */
2554 asection *sec;
2555
2556 /* Total number of relocs copied for the input section. */
2557 bfd_size_type count;
2558
2559 /* Number of pc-relative relocs copied for the input section. */
2560 bfd_size_type pc_count;
2561 };
2562
2563 /* Track PLT entries needed for a given symbol. We might need more
2564 than one glink entry per symbol. */
2565 struct plt_entry
2566 {
2567 struct plt_entry *next;
2568
2569 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2570 This field stores the offset into .got2 used to initialise the
2571 GOT pointer reg. It will always be at least 32768 (and for
2572 current gcc this is the only offset used). */
2573 bfd_vma addend;
2574
2575 /* The .got2 section. */
2576 asection *sec;
2577
2578 /* PLT refcount or offset. */
2579 union
2580 {
2581 bfd_signed_vma refcount;
2582 bfd_vma offset;
2583 } plt;
2584
2585 /* .glink stub offset. */
2586 bfd_vma glink_offset;
2587 };
2588
2589 /* Of those relocs that might be copied as dynamic relocs, this function
2590 selects those that must be copied when linking a shared library,
2591 even when the symbol is local. */
2592
2593 static int
2594 must_be_dyn_reloc (struct bfd_link_info *info,
2595 enum elf_ppc_reloc_type r_type)
2596 {
2597 switch (r_type)
2598 {
2599 default:
2600 return 1;
2601
2602 case R_PPC_REL24:
2603 case R_PPC_REL14:
2604 case R_PPC_REL14_BRTAKEN:
2605 case R_PPC_REL14_BRNTAKEN:
2606 case R_PPC_REL32:
2607 return 0;
2608
2609 case R_PPC_TPREL32:
2610 case R_PPC_TPREL16:
2611 case R_PPC_TPREL16_LO:
2612 case R_PPC_TPREL16_HI:
2613 case R_PPC_TPREL16_HA:
2614 return !info->executable;
2615 }
2616 }
2617
2618 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2619 copying dynamic variables from a shared lib into an app's dynbss
2620 section, and instead use a dynamic relocation to point into the
2621 shared lib. */
2622 #define ELIMINATE_COPY_RELOCS 1
2623
2624 /* PPC ELF linker hash entry. */
2625
2626 struct ppc_elf_link_hash_entry
2627 {
2628 struct elf_link_hash_entry elf;
2629
2630 /* If this symbol is used in the linker created sections, the processor
2631 specific backend uses this field to map the field into the offset
2632 from the beginning of the section. */
2633 elf_linker_section_pointers_t *linker_section_pointer;
2634
2635 /* Track dynamic relocs copied for this symbol. */
2636 struct ppc_elf_dyn_relocs *dyn_relocs;
2637
2638 /* Contexts in which symbol is used in the GOT (or TOC).
2639 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2640 corresponding relocs are encountered during check_relocs.
2641 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2642 indicate the corresponding GOT entry type is not needed. */
2643 #define TLS_GD 1 /* GD reloc. */
2644 #define TLS_LD 2 /* LD reloc. */
2645 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2646 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2647 #define TLS_TLS 16 /* Any TLS reloc. */
2648 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2649 char tls_mask;
2650
2651 /* Nonzero if we have seen a small data relocation referring to this
2652 symbol. */
2653 unsigned char has_sda_refs;
2654 };
2655
2656 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2657
2658 /* PPC ELF linker hash table. */
2659
2660 struct ppc_elf_link_hash_table
2661 {
2662 struct elf_link_hash_table elf;
2663
2664 /* Short-cuts to get to dynamic linker sections. */
2665 asection *got;
2666 asection *relgot;
2667 asection *glink;
2668 asection *plt;
2669 asection *relplt;
2670 asection *dynbss;
2671 asection *relbss;
2672 asection *dynsbss;
2673 asection *relsbss;
2674 elf_linker_section_t sdata[2];
2675 asection *sbss;
2676
2677 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2678 asection *srelplt2;
2679
2680 /* The .got.plt section (VxWorks only)*/
2681 asection *sgotplt;
2682
2683 /* Shortcut to __tls_get_addr. */
2684 struct elf_link_hash_entry *tls_get_addr;
2685
2686 /* The bfd that forced an old-style PLT. */
2687 bfd *old_bfd;
2688
2689 /* TLS local dynamic got entry handling. */
2690 union {
2691 bfd_signed_vma refcount;
2692 bfd_vma offset;
2693 } tlsld_got;
2694
2695 /* Offset of PltResolve function in glink. */
2696 bfd_vma glink_pltresolve;
2697
2698 /* Size of reserved GOT entries. */
2699 unsigned int got_header_size;
2700 /* Non-zero if allocating the header left a gap. */
2701 unsigned int got_gap;
2702
2703 /* The type of PLT we have chosen to use. */
2704 enum ppc_elf_plt_type plt_type;
2705
2706 /* Set if we should emit symbols for stubs. */
2707 unsigned int emit_stub_syms:1;
2708
2709 /* True if the target system is VxWorks. */
2710 unsigned int is_vxworks:1;
2711
2712 /* The size of PLT entries. */
2713 int plt_entry_size;
2714 /* The distance between adjacent PLT slots. */
2715 int plt_slot_size;
2716 /* The size of the first PLT entry. */
2717 int plt_initial_entry_size;
2718
2719 /* Small local sym to section mapping cache. */
2720 struct sym_sec_cache sym_sec;
2721 };
2722
2723 /* Get the PPC ELF linker hash table from a link_info structure. */
2724
2725 #define ppc_elf_hash_table(p) \
2726 ((struct ppc_elf_link_hash_table *) (p)->hash)
2727
2728 /* Create an entry in a PPC ELF linker hash table. */
2729
2730 static struct bfd_hash_entry *
2731 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2732 struct bfd_hash_table *table,
2733 const char *string)
2734 {
2735 /* Allocate the structure if it has not already been allocated by a
2736 subclass. */
2737 if (entry == NULL)
2738 {
2739 entry = bfd_hash_allocate (table,
2740 sizeof (struct ppc_elf_link_hash_entry));
2741 if (entry == NULL)
2742 return entry;
2743 }
2744
2745 /* Call the allocation method of the superclass. */
2746 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2747 if (entry != NULL)
2748 {
2749 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2750 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2751 ppc_elf_hash_entry (entry)->tls_mask = 0;
2752 }
2753
2754 return entry;
2755 }
2756
2757 /* Create a PPC ELF linker hash table. */
2758
2759 static struct bfd_link_hash_table *
2760 ppc_elf_link_hash_table_create (bfd *abfd)
2761 {
2762 struct ppc_elf_link_hash_table *ret;
2763
2764 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2765 if (ret == NULL)
2766 return NULL;
2767
2768 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2769 ppc_elf_link_hash_newfunc,
2770 sizeof (struct ppc_elf_link_hash_entry)))
2771 {
2772 free (ret);
2773 return NULL;
2774 }
2775
2776 ret->elf.init_plt_refcount.refcount = 0;
2777 ret->elf.init_plt_refcount.glist = NULL;
2778 ret->elf.init_plt_offset.offset = 0;
2779 ret->elf.init_plt_offset.glist = NULL;
2780
2781 ret->sdata[0].name = ".sdata";
2782 ret->sdata[0].sym_name = "_SDA_BASE_";
2783 ret->sdata[0].bss_name = ".sbss";
2784
2785 ret->sdata[1].name = ".sdata2";
2786 ret->sdata[1].sym_name = "_SDA2_BASE_";
2787 ret->sdata[1].bss_name = ".sbss2";
2788
2789 ret->plt_entry_size = 12;
2790 ret->plt_slot_size = 8;
2791 ret->plt_initial_entry_size = 72;
2792
2793 return &ret->elf.root;
2794 }
2795
2796 /* Create .got and the related sections. */
2797
2798 static bfd_boolean
2799 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2800 {
2801 struct ppc_elf_link_hash_table *htab;
2802 asection *s;
2803 flagword flags;
2804
2805 if (!_bfd_elf_create_got_section (abfd, info))
2806 return FALSE;
2807
2808 htab = ppc_elf_hash_table (info);
2809 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2810 if (s == NULL)
2811 abort ();
2812
2813 if (htab->is_vxworks)
2814 {
2815 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2816 if (!htab->sgotplt)
2817 abort ();
2818 }
2819 else
2820 {
2821 /* The powerpc .got has a blrl instruction in it. Mark it
2822 executable. */
2823 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2824 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2825 if (!bfd_set_section_flags (abfd, s, flags))
2826 return FALSE;
2827 }
2828
2829 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2830 | SEC_LINKER_CREATED | SEC_READONLY);
2831 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2832 if (!htab->relgot
2833 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2834 return FALSE;
2835
2836 return TRUE;
2837 }
2838
2839 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2840 to output sections (just like _bfd_elf_create_dynamic_sections has
2841 to create .dynbss and .rela.bss). */
2842
2843 static bfd_boolean
2844 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2845 {
2846 struct ppc_elf_link_hash_table *htab;
2847 asection *s;
2848 flagword flags;
2849
2850 htab = ppc_elf_hash_table (info);
2851
2852 if (htab->got == NULL
2853 && !ppc_elf_create_got (abfd, info))
2854 return FALSE;
2855
2856 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2857 return FALSE;
2858
2859 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2861
2862 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2863 htab->glink = s;
2864 if (s == NULL
2865 || !bfd_set_section_alignment (abfd, s, 4))
2866 return FALSE;
2867
2868 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2869 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2870 SEC_ALLOC | SEC_LINKER_CREATED);
2871 htab->dynsbss = s;
2872 if (s == NULL)
2873 return FALSE;
2874
2875 if (! info->shared)
2876 {
2877 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2878 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2879 htab->relsbss = s;
2880 if (s == NULL
2881 || ! bfd_set_section_alignment (abfd, s, 2))
2882 return FALSE;
2883 }
2884
2885 if (htab->is_vxworks
2886 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2887 return FALSE;
2888
2889 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2890 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2891 if (s == NULL)
2892 abort ();
2893
2894 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2895 if (htab->plt_type == PLT_VXWORKS)
2896 /* The VxWorks PLT is a loaded section with contents. */
2897 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2898 return bfd_set_section_flags (abfd, s, flags);
2899 }
2900
2901 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2902
2903 static void
2904 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2905 struct elf_link_hash_entry *dir,
2906 struct elf_link_hash_entry *ind)
2907 {
2908 struct ppc_elf_link_hash_entry *edir, *eind;
2909
2910 edir = (struct ppc_elf_link_hash_entry *) dir;
2911 eind = (struct ppc_elf_link_hash_entry *) ind;
2912
2913 if (eind->dyn_relocs != NULL)
2914 {
2915 if (edir->dyn_relocs != NULL)
2916 {
2917 struct ppc_elf_dyn_relocs **pp;
2918 struct ppc_elf_dyn_relocs *p;
2919
2920 /* Add reloc counts against the indirect sym to the direct sym
2921 list. Merge any entries against the same section. */
2922 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2923 {
2924 struct ppc_elf_dyn_relocs *q;
2925
2926 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2927 if (q->sec == p->sec)
2928 {
2929 q->pc_count += p->pc_count;
2930 q->count += p->count;
2931 *pp = p->next;
2932 break;
2933 }
2934 if (q == NULL)
2935 pp = &p->next;
2936 }
2937 *pp = edir->dyn_relocs;
2938 }
2939
2940 edir->dyn_relocs = eind->dyn_relocs;
2941 eind->dyn_relocs = NULL;
2942 }
2943
2944 edir->tls_mask |= eind->tls_mask;
2945 edir->has_sda_refs |= eind->has_sda_refs;
2946
2947 /* If called to transfer flags for a weakdef during processing
2948 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2949 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2950 if (!(ELIMINATE_COPY_RELOCS
2951 && eind->elf.root.type != bfd_link_hash_indirect
2952 && edir->elf.dynamic_adjusted))
2953 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2954
2955 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2956 edir->elf.ref_regular |= eind->elf.ref_regular;
2957 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2958 edir->elf.needs_plt |= eind->elf.needs_plt;
2959 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2960
2961 /* If we were called to copy over info for a weak sym, that's all. */
2962 if (eind->elf.root.type != bfd_link_hash_indirect)
2963 return;
2964
2965 /* Copy over the GOT refcount entries that we may have already seen to
2966 the symbol which just became indirect. */
2967 edir->elf.got.refcount += eind->elf.got.refcount;
2968 eind->elf.got.refcount = 0;
2969
2970 /* And plt entries. */
2971 if (eind->elf.plt.plist != NULL)
2972 {
2973 if (edir->elf.plt.plist != NULL)
2974 {
2975 struct plt_entry **entp;
2976 struct plt_entry *ent;
2977
2978 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2979 {
2980 struct plt_entry *dent;
2981
2982 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2983 if (dent->sec == ent->sec && dent->addend == ent->addend)
2984 {
2985 dent->plt.refcount += ent->plt.refcount;
2986 *entp = ent->next;
2987 break;
2988 }
2989 if (dent == NULL)
2990 entp = &ent->next;
2991 }
2992 *entp = edir->elf.plt.plist;
2993 }
2994
2995 edir->elf.plt.plist = eind->elf.plt.plist;
2996 eind->elf.plt.plist = NULL;
2997 }
2998
2999 if (eind->elf.dynindx != -1)
3000 {
3001 if (edir->elf.dynindx != -1)
3002 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3003 edir->elf.dynstr_index);
3004 edir->elf.dynindx = eind->elf.dynindx;
3005 edir->elf.dynstr_index = eind->elf.dynstr_index;
3006 eind->elf.dynindx = -1;
3007 eind->elf.dynstr_index = 0;
3008 }
3009 }
3010
3011 /* Hook called by the linker routine which adds symbols from an object
3012 file. We use it to put .comm items in .sbss, and not .bss. */
3013
3014 static bfd_boolean
3015 ppc_elf_add_symbol_hook (bfd *abfd,
3016 struct bfd_link_info *info,
3017 Elf_Internal_Sym *sym,
3018 const char **namep ATTRIBUTE_UNUSED,
3019 flagword *flagsp ATTRIBUTE_UNUSED,
3020 asection **secp,
3021 bfd_vma *valp)
3022 {
3023 if (sym->st_shndx == SHN_COMMON
3024 && !info->relocatable
3025 && is_ppc_elf (info->output_bfd)
3026 && sym->st_size <= elf_gp_size (abfd))
3027 {
3028 /* Common symbols less than or equal to -G nn bytes are automatically
3029 put into .sbss. */
3030 struct ppc_elf_link_hash_table *htab;
3031
3032 htab = ppc_elf_hash_table (info);
3033 if (htab->sbss == NULL)
3034 {
3035 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3036
3037 if (!htab->elf.dynobj)
3038 htab->elf.dynobj = abfd;
3039
3040 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3041 ".sbss",
3042 flags);
3043 if (htab->sbss == NULL)
3044 return FALSE;
3045 }
3046
3047 *secp = htab->sbss;
3048 *valp = sym->st_size;
3049 }
3050
3051 return TRUE;
3052 }
3053 \f
3054 static bfd_boolean
3055 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3056 elf_linker_section_t *lsect)
3057 {
3058 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3059 TRUE, FALSE, TRUE);
3060 if (lsect->sym == NULL)
3061 return FALSE;
3062 if (lsect->sym->root.type == bfd_link_hash_new)
3063 lsect->sym->non_elf = 0;
3064 lsect->sym->ref_regular = 1;
3065 return TRUE;
3066 }
3067
3068 /* Create a special linker section. */
3069
3070 static bfd_boolean
3071 ppc_elf_create_linker_section (bfd *abfd,
3072 struct bfd_link_info *info,
3073 flagword flags,
3074 elf_linker_section_t *lsect)
3075 {
3076 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3077 asection *s;
3078
3079 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3080 | SEC_LINKER_CREATED);
3081
3082 /* Record the first bfd that needs the special sections. */
3083 if (!htab->elf.dynobj)
3084 htab->elf.dynobj = abfd;
3085
3086 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3087 lsect->name,
3088 flags);
3089 if (s == NULL
3090 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3091 return FALSE;
3092 lsect->section = s;
3093
3094 return create_sdata_sym (htab, lsect);
3095 }
3096
3097 /* Find a linker generated pointer with a given addend and type. */
3098
3099 static elf_linker_section_pointers_t *
3100 elf_find_pointer_linker_section
3101 (elf_linker_section_pointers_t *linker_pointers,
3102 bfd_vma addend,
3103 elf_linker_section_t *lsect)
3104 {
3105 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3106 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3107 return linker_pointers;
3108
3109 return NULL;
3110 }
3111
3112 /* Allocate a pointer to live in a linker created section. */
3113
3114 static bfd_boolean
3115 elf_create_pointer_linker_section (bfd *abfd,
3116 elf_linker_section_t *lsect,
3117 struct elf_link_hash_entry *h,
3118 const Elf_Internal_Rela *rel)
3119 {
3120 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3121 elf_linker_section_pointers_t *linker_section_ptr;
3122 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3123 bfd_size_type amt;
3124
3125 BFD_ASSERT (lsect != NULL);
3126
3127 /* Is this a global symbol? */
3128 if (h != NULL)
3129 {
3130 struct ppc_elf_link_hash_entry *eh;
3131
3132 /* Has this symbol already been allocated? If so, our work is done. */
3133 eh = (struct ppc_elf_link_hash_entry *) h;
3134 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3135 rel->r_addend,
3136 lsect))
3137 return TRUE;
3138
3139 ptr_linker_section_ptr = &eh->linker_section_pointer;
3140 }
3141 else
3142 {
3143 BFD_ASSERT (is_ppc_elf (abfd));
3144
3145 /* Allocation of a pointer to a local symbol. */
3146 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3147
3148 /* Allocate a table to hold the local symbols if first time. */
3149 if (!ptr)
3150 {
3151 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3152
3153 amt = num_symbols;
3154 amt *= sizeof (elf_linker_section_pointers_t *);
3155 ptr = bfd_zalloc (abfd, amt);
3156
3157 if (!ptr)
3158 return FALSE;
3159
3160 elf_local_ptr_offsets (abfd) = ptr;
3161 }
3162
3163 /* Has this symbol already been allocated? If so, our work is done. */
3164 if (elf_find_pointer_linker_section (ptr[r_symndx],
3165 rel->r_addend,
3166 lsect))
3167 return TRUE;
3168
3169 ptr_linker_section_ptr = &ptr[r_symndx];
3170 }
3171
3172 /* Allocate space for a pointer in the linker section, and allocate
3173 a new pointer record from internal memory. */
3174 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3175 amt = sizeof (elf_linker_section_pointers_t);
3176 linker_section_ptr = bfd_alloc (abfd, amt);
3177
3178 if (!linker_section_ptr)
3179 return FALSE;
3180
3181 linker_section_ptr->next = *ptr_linker_section_ptr;
3182 linker_section_ptr->addend = rel->r_addend;
3183 linker_section_ptr->lsect = lsect;
3184 *ptr_linker_section_ptr = linker_section_ptr;
3185
3186 linker_section_ptr->offset = lsect->section->size;
3187 lsect->section->size += 4;
3188
3189 #ifdef DEBUG
3190 fprintf (stderr,
3191 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3192 lsect->name, (long) linker_section_ptr->offset,
3193 (long) lsect->section->size);
3194 #endif
3195
3196 return TRUE;
3197 }
3198
3199 static bfd_boolean
3200 update_local_sym_info (bfd *abfd,
3201 Elf_Internal_Shdr *symtab_hdr,
3202 unsigned long r_symndx,
3203 int tls_type)
3204 {
3205 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3206 char *local_got_tls_masks;
3207
3208 if (local_got_refcounts == NULL)
3209 {
3210 bfd_size_type size = symtab_hdr->sh_info;
3211
3212 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3213 local_got_refcounts = bfd_zalloc (abfd, size);
3214 if (local_got_refcounts == NULL)
3215 return FALSE;
3216 elf_local_got_refcounts (abfd) = local_got_refcounts;
3217 }
3218
3219 local_got_refcounts[r_symndx] += 1;
3220 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3221 local_got_tls_masks[r_symndx] |= tls_type;
3222 return TRUE;
3223 }
3224
3225 static bfd_boolean
3226 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
3227 asection *sec, bfd_vma addend)
3228 {
3229 struct plt_entry *ent;
3230
3231 if (addend < 32768)
3232 sec = NULL;
3233 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3234 if (ent->sec == sec && ent->addend == addend)
3235 break;
3236 if (ent == NULL)
3237 {
3238 bfd_size_type amt = sizeof (*ent);
3239 ent = bfd_alloc (abfd, amt);
3240 if (ent == NULL)
3241 return FALSE;
3242 ent->next = h->plt.plist;
3243 ent->sec = sec;
3244 ent->addend = addend;
3245 ent->plt.refcount = 0;
3246 h->plt.plist = ent;
3247 }
3248 ent->plt.refcount += 1;
3249 return TRUE;
3250 }
3251
3252 static struct plt_entry *
3253 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3254 {
3255 struct plt_entry *ent;
3256
3257 if (addend < 32768)
3258 sec = NULL;
3259 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3260 if (ent->sec == sec && ent->addend == addend)
3261 break;
3262 return ent;
3263 }
3264
3265 static void
3266 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3267 {
3268 (*_bfd_error_handler)
3269 (_("%B: relocation %s cannot be used when making a shared object"),
3270 abfd,
3271 ppc_elf_howto_table[r_type]->name);
3272 bfd_set_error (bfd_error_bad_value);
3273 }
3274
3275 /* Look through the relocs for a section during the first phase, and
3276 allocate space in the global offset table or procedure linkage
3277 table. */
3278
3279 static bfd_boolean
3280 ppc_elf_check_relocs (bfd *abfd,
3281 struct bfd_link_info *info,
3282 asection *sec,
3283 const Elf_Internal_Rela *relocs)
3284 {
3285 struct ppc_elf_link_hash_table *htab;
3286 Elf_Internal_Shdr *symtab_hdr;
3287 struct elf_link_hash_entry **sym_hashes;
3288 const Elf_Internal_Rela *rel;
3289 const Elf_Internal_Rela *rel_end;
3290 asection *got2, *sreloc;
3291
3292 if (info->relocatable)
3293 return TRUE;
3294
3295 /* Don't do anything special with non-loaded, non-alloced sections.
3296 In particular, any relocs in such sections should not affect GOT
3297 and PLT reference counting (ie. we don't allow them to create GOT
3298 or PLT entries), there's no possibility or desire to optimize TLS
3299 relocs, and there's not much point in propagating relocs to shared
3300 libs that the dynamic linker won't relocate. */
3301 if ((sec->flags & SEC_ALLOC) == 0)
3302 return TRUE;
3303
3304 #ifdef DEBUG
3305 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3306 sec, abfd);
3307 #endif
3308
3309 BFD_ASSERT (is_ppc_elf (abfd));
3310
3311 /* Initialize howto table if not already done. */
3312 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3313 ppc_elf_howto_init ();
3314
3315 htab = ppc_elf_hash_table (info);
3316 symtab_hdr = &elf_symtab_hdr (abfd);
3317 sym_hashes = elf_sym_hashes (abfd);
3318 got2 = bfd_get_section_by_name (abfd, ".got2");
3319 sreloc = NULL;
3320
3321 rel_end = relocs + sec->reloc_count;
3322 for (rel = relocs; rel < rel_end; rel++)
3323 {
3324 unsigned long r_symndx;
3325 enum elf_ppc_reloc_type r_type;
3326 struct elf_link_hash_entry *h;
3327 int tls_type = 0;
3328
3329 r_symndx = ELF32_R_SYM (rel->r_info);
3330 if (r_symndx < symtab_hdr->sh_info)
3331 h = NULL;
3332 else
3333 {
3334 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3335 while (h->root.type == bfd_link_hash_indirect
3336 || h->root.type == bfd_link_hash_warning)
3337 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3338 }
3339
3340 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3341 This shows up in particular in an R_PPC_ADDR32 in the eabi
3342 startup code. */
3343 if (h != NULL
3344 && htab->got == NULL
3345 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3346 {
3347 if (htab->elf.dynobj == NULL)
3348 htab->elf.dynobj = abfd;
3349 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3350 return FALSE;
3351 BFD_ASSERT (h == htab->elf.hgot);
3352 }
3353
3354 r_type = ELF32_R_TYPE (rel->r_info);
3355 switch (r_type)
3356 {
3357 case R_PPC_GOT_TLSLD16:
3358 case R_PPC_GOT_TLSLD16_LO:
3359 case R_PPC_GOT_TLSLD16_HI:
3360 case R_PPC_GOT_TLSLD16_HA:
3361 tls_type = TLS_TLS | TLS_LD;
3362 goto dogottls;
3363
3364 case R_PPC_GOT_TLSGD16:
3365 case R_PPC_GOT_TLSGD16_LO:
3366 case R_PPC_GOT_TLSGD16_HI:
3367 case R_PPC_GOT_TLSGD16_HA:
3368 tls_type = TLS_TLS | TLS_GD;
3369 goto dogottls;
3370
3371 case R_PPC_GOT_TPREL16:
3372 case R_PPC_GOT_TPREL16_LO:
3373 case R_PPC_GOT_TPREL16_HI:
3374 case R_PPC_GOT_TPREL16_HA:
3375 if (!info->executable)
3376 info->flags |= DF_STATIC_TLS;
3377 tls_type = TLS_TLS | TLS_TPREL;
3378 goto dogottls;
3379
3380 case R_PPC_GOT_DTPREL16:
3381 case R_PPC_GOT_DTPREL16_LO:
3382 case R_PPC_GOT_DTPREL16_HI:
3383 case R_PPC_GOT_DTPREL16_HA:
3384 tls_type = TLS_TLS | TLS_DTPREL;
3385 dogottls:
3386 sec->has_tls_reloc = 1;
3387 /* Fall thru */
3388
3389 /* GOT16 relocations */
3390 case R_PPC_GOT16:
3391 case R_PPC_GOT16_LO:
3392 case R_PPC_GOT16_HI:
3393 case R_PPC_GOT16_HA:
3394 /* This symbol requires a global offset table entry. */
3395 if (htab->got == NULL)
3396 {
3397 if (htab->elf.dynobj == NULL)
3398 htab->elf.dynobj = abfd;
3399 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3400 return FALSE;
3401 }
3402 if (h != NULL)
3403 {
3404 h->got.refcount += 1;
3405 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3406 }
3407 else
3408 /* This is a global offset table entry for a local symbol. */
3409 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3410 return FALSE;
3411 break;
3412
3413 /* Indirect .sdata relocation. */
3414 case R_PPC_EMB_SDAI16:
3415 if (info->shared)
3416 {
3417 bad_shared_reloc (abfd, r_type);
3418 return FALSE;
3419 }
3420 if (htab->sdata[0].section == NULL
3421 && !ppc_elf_create_linker_section (abfd, info, 0,
3422 &htab->sdata[0]))
3423 return FALSE;
3424 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3425 h, rel))
3426 return FALSE;
3427 if (h != NULL)
3428 {
3429 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3430 h->non_got_ref = TRUE;
3431 }
3432 break;
3433
3434 /* Indirect .sdata2 relocation. */
3435 case R_PPC_EMB_SDA2I16:
3436 if (info->shared)
3437 {
3438 bad_shared_reloc (abfd, r_type);
3439 return FALSE;
3440 }
3441 if (htab->sdata[1].section == NULL
3442 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3443 &htab->sdata[1]))
3444 return FALSE;
3445 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3446 h, rel))
3447 return FALSE;
3448 if (h != NULL)
3449 {
3450 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3451 h->non_got_ref = TRUE;
3452 }
3453 break;
3454
3455 case R_PPC_SDAREL16:
3456 if (info->shared)
3457 {
3458 bad_shared_reloc (abfd, r_type);
3459 return FALSE;
3460 }
3461 if (htab->sdata[0].sym == NULL
3462 && !create_sdata_sym (htab, &htab->sdata[0]))
3463 return FALSE;
3464 if (h != NULL)
3465 {
3466 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3467 h->non_got_ref = TRUE;
3468 }
3469 break;
3470
3471 case R_PPC_EMB_SDA2REL:
3472 if (info->shared)
3473 {
3474 bad_shared_reloc (abfd, r_type);
3475 return FALSE;
3476 }
3477 if (htab->sdata[1].sym == NULL
3478 && !create_sdata_sym (htab, &htab->sdata[1]))
3479 return FALSE;
3480 if (h != NULL)
3481 {
3482 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3483 h->non_got_ref = TRUE;
3484 }
3485 break;
3486
3487 case R_PPC_EMB_SDA21:
3488 case R_PPC_EMB_RELSDA:
3489 if (info->shared)
3490 {
3491 bad_shared_reloc (abfd, r_type);
3492 return FALSE;
3493 }
3494 if (htab->sdata[0].sym == NULL
3495 && !create_sdata_sym (htab, &htab->sdata[0]))
3496 return FALSE;
3497 if (htab->sdata[1].sym == NULL
3498 && !create_sdata_sym (htab, &htab->sdata[1]))
3499 return FALSE;
3500 if (h != NULL)
3501 {
3502 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3503 h->non_got_ref = TRUE;
3504 }
3505 break;
3506
3507 case R_PPC_EMB_NADDR32:
3508 case R_PPC_EMB_NADDR16:
3509 case R_PPC_EMB_NADDR16_LO:
3510 case R_PPC_EMB_NADDR16_HI:
3511 case R_PPC_EMB_NADDR16_HA:
3512 if (info->shared)
3513 {
3514 bad_shared_reloc (abfd, r_type);
3515 return FALSE;
3516 }
3517 if (h != NULL)
3518 h->non_got_ref = TRUE;
3519 break;
3520
3521 case R_PPC_PLT32:
3522 case R_PPC_PLTREL24:
3523 case R_PPC_PLTREL32:
3524 case R_PPC_PLT16_LO:
3525 case R_PPC_PLT16_HI:
3526 case R_PPC_PLT16_HA:
3527 #ifdef DEBUG
3528 fprintf (stderr, "Reloc requires a PLT entry\n");
3529 #endif
3530 /* This symbol requires a procedure linkage table entry. We
3531 actually build the entry in finish_dynamic_symbol,
3532 because this might be a case of linking PIC code without
3533 linking in any dynamic objects, in which case we don't
3534 need to generate a procedure linkage table after all. */
3535
3536 if (h == NULL)
3537 {
3538 /* It does not make sense to have a procedure linkage
3539 table entry for a local symbol. */
3540 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3541 "local symbol"),
3542 abfd,
3543 sec,
3544 (long) rel->r_offset,
3545 ppc_elf_howto_table[r_type]->name);
3546 bfd_set_error (bfd_error_bad_value);
3547 return FALSE;
3548 }
3549 else
3550 {
3551 bfd_vma addend = 0;
3552
3553 if (r_type == R_PPC_PLTREL24)
3554 {
3555 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3556 addend = rel->r_addend;
3557 }
3558 h->needs_plt = 1;
3559 if (!update_plt_info (abfd, h, got2, addend))
3560 return FALSE;
3561 }
3562 break;
3563
3564 /* The following relocations don't need to propagate the
3565 relocation if linking a shared object since they are
3566 section relative. */
3567 case R_PPC_SECTOFF:
3568 case R_PPC_SECTOFF_LO:
3569 case R_PPC_SECTOFF_HI:
3570 case R_PPC_SECTOFF_HA:
3571 case R_PPC_DTPREL16:
3572 case R_PPC_DTPREL16_LO:
3573 case R_PPC_DTPREL16_HI:
3574 case R_PPC_DTPREL16_HA:
3575 case R_PPC_TOC16:
3576 break;
3577
3578 case R_PPC_REL16:
3579 case R_PPC_REL16_LO:
3580 case R_PPC_REL16_HI:
3581 case R_PPC_REL16_HA:
3582 ppc_elf_tdata (abfd)->has_rel16 = 1;
3583 break;
3584
3585 /* These are just markers. */
3586 case R_PPC_TLS:
3587 case R_PPC_EMB_MRKREF:
3588 case R_PPC_NONE:
3589 case R_PPC_max:
3590 break;
3591
3592 /* These should only appear in dynamic objects. */
3593 case R_PPC_COPY:
3594 case R_PPC_GLOB_DAT:
3595 case R_PPC_JMP_SLOT:
3596 case R_PPC_RELATIVE:
3597 break;
3598
3599 /* These aren't handled yet. We'll report an error later. */
3600 case R_PPC_ADDR30:
3601 case R_PPC_EMB_RELSEC16:
3602 case R_PPC_EMB_RELST_LO:
3603 case R_PPC_EMB_RELST_HI:
3604 case R_PPC_EMB_RELST_HA:
3605 case R_PPC_EMB_BIT_FLD:
3606 break;
3607
3608 /* This refers only to functions defined in the shared library. */
3609 case R_PPC_LOCAL24PC:
3610 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3611 {
3612 htab->plt_type = PLT_OLD;
3613 htab->old_bfd = abfd;
3614 }
3615 break;
3616
3617 /* This relocation describes the C++ object vtable hierarchy.
3618 Reconstruct it for later use during GC. */
3619 case R_PPC_GNU_VTINHERIT:
3620 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3621 return FALSE;
3622 break;
3623
3624 /* This relocation describes which C++ vtable entries are actually
3625 used. Record for later use during GC. */
3626 case R_PPC_GNU_VTENTRY:
3627 BFD_ASSERT (h != NULL);
3628 if (h != NULL
3629 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3630 return FALSE;
3631 break;
3632
3633 /* We shouldn't really be seeing these. */
3634 case R_PPC_TPREL32:
3635 case R_PPC_TPREL16:
3636 case R_PPC_TPREL16_LO:
3637 case R_PPC_TPREL16_HI:
3638 case R_PPC_TPREL16_HA:
3639 if (!info->executable)
3640 info->flags |= DF_STATIC_TLS;
3641 goto dodyn;
3642
3643 /* Nor these. */
3644 case R_PPC_DTPMOD32:
3645 case R_PPC_DTPREL32:
3646 goto dodyn;
3647
3648 case R_PPC_REL32:
3649 if (h == NULL
3650 && got2 != NULL
3651 && (sec->flags & SEC_CODE) != 0
3652 && (info->shared || info->pie)
3653 && htab->plt_type == PLT_UNSET)
3654 {
3655 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3656 the start of a function, which assembles to a REL32
3657 reference to .got2. If we detect one of these, then
3658 force the old PLT layout because the linker cannot
3659 reliably deduce the GOT pointer value needed for
3660 PLT call stubs. */
3661 asection *s;
3662
3663 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3664 r_symndx);
3665 if (s == got2)
3666 {
3667 htab->plt_type = PLT_OLD;
3668 htab->old_bfd = abfd;
3669 }
3670 }
3671 if (h == NULL || h == htab->elf.hgot)
3672 break;
3673 /* fall through */
3674
3675 case R_PPC_ADDR32:
3676 case R_PPC_ADDR16:
3677 case R_PPC_ADDR16_LO:
3678 case R_PPC_ADDR16_HI:
3679 case R_PPC_ADDR16_HA:
3680 case R_PPC_UADDR32:
3681 case R_PPC_UADDR16:
3682 if (h != NULL && !info->shared)
3683 {
3684 /* We may need a plt entry if the symbol turns out to be
3685 a function defined in a dynamic object. */
3686 if (!update_plt_info (abfd, h, NULL, 0))
3687 return FALSE;
3688
3689 /* We may need a copy reloc too. */
3690 h->non_got_ref = 1;
3691 h->pointer_equality_needed = 1;
3692 }
3693 goto dodyn;
3694
3695 case R_PPC_REL24:
3696 case R_PPC_REL14:
3697 case R_PPC_REL14_BRTAKEN:
3698 case R_PPC_REL14_BRNTAKEN:
3699 if (h == NULL)
3700 break;
3701 if (h == htab->elf.hgot)
3702 {
3703 if (htab->plt_type == PLT_UNSET)
3704 {
3705 htab->plt_type = PLT_OLD;
3706 htab->old_bfd = abfd;
3707 }
3708 break;
3709 }
3710 /* fall through */
3711
3712 case R_PPC_ADDR24:
3713 case R_PPC_ADDR14:
3714 case R_PPC_ADDR14_BRTAKEN:
3715 case R_PPC_ADDR14_BRNTAKEN:
3716 if (h != NULL && !info->shared)
3717 {
3718 /* We may need a plt entry if the symbol turns out to be
3719 a function defined in a dynamic object. */
3720 if (!update_plt_info (abfd, h, NULL, 0))
3721 return FALSE;
3722 break;
3723 }
3724
3725 dodyn:
3726 /* If we are creating a shared library, and this is a reloc
3727 against a global symbol, or a non PC relative reloc
3728 against a local symbol, then we need to copy the reloc
3729 into the shared library. However, if we are linking with
3730 -Bsymbolic, we do not need to copy a reloc against a
3731 global symbol which is defined in an object we are
3732 including in the link (i.e., DEF_REGULAR is set). At
3733 this point we have not seen all the input files, so it is
3734 possible that DEF_REGULAR is not set now but will be set
3735 later (it is never cleared). In case of a weak definition,
3736 DEF_REGULAR may be cleared later by a strong definition in
3737 a shared library. We account for that possibility below by
3738 storing information in the dyn_relocs field of the hash
3739 table entry. A similar situation occurs when creating
3740 shared libraries and symbol visibility changes render the
3741 symbol local.
3742
3743 If on the other hand, we are creating an executable, we
3744 may need to keep relocations for symbols satisfied by a
3745 dynamic library if we manage to avoid copy relocs for the
3746 symbol. */
3747 if ((info->shared
3748 && (must_be_dyn_reloc (info, r_type)
3749 || (h != NULL
3750 && (! info->symbolic
3751 || h->root.type == bfd_link_hash_defweak
3752 || !h->def_regular))))
3753 || (ELIMINATE_COPY_RELOCS
3754 && !info->shared
3755 && h != NULL
3756 && (h->root.type == bfd_link_hash_defweak
3757 || !h->def_regular)))
3758 {
3759 struct ppc_elf_dyn_relocs *p;
3760 struct ppc_elf_dyn_relocs **head;
3761
3762 #ifdef DEBUG
3763 fprintf (stderr,
3764 "ppc_elf_check_relocs needs to "
3765 "create relocation for %s\n",
3766 (h && h->root.root.string
3767 ? h->root.root.string : "<unknown>"));
3768 #endif
3769 if (sreloc == NULL)
3770 {
3771 const char *name;
3772
3773 name = (bfd_elf_string_from_elf_section
3774 (abfd,
3775 elf_elfheader (abfd)->e_shstrndx,
3776 elf_section_data (sec)->rel_hdr.sh_name));
3777 if (name == NULL)
3778 return FALSE;
3779
3780 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3781 && strcmp (bfd_get_section_name (abfd, sec),
3782 name + 5) == 0);
3783
3784 if (htab->elf.dynobj == NULL)
3785 htab->elf.dynobj = abfd;
3786 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3787 if (sreloc == NULL)
3788 {
3789 flagword flags;
3790
3791 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3792 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3793 | SEC_ALLOC | SEC_LOAD);
3794 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3795 name,
3796 flags);
3797 if (sreloc == NULL
3798 || ! bfd_set_section_alignment (htab->elf.dynobj,
3799 sreloc, 2))
3800 return FALSE;
3801 }
3802 elf_section_data (sec)->sreloc = sreloc;
3803 }
3804
3805 /* If this is a global symbol, we count the number of
3806 relocations we need for this symbol. */
3807 if (h != NULL)
3808 {
3809 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3810 }
3811 else
3812 {
3813 /* Track dynamic relocs needed for local syms too.
3814 We really need local syms available to do this
3815 easily. Oh well. */
3816
3817 asection *s;
3818 void *vpp;
3819
3820 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3821 sec, r_symndx);
3822 if (s == NULL)
3823 return FALSE;
3824
3825 vpp = &elf_section_data (s)->local_dynrel;
3826 head = (struct ppc_elf_dyn_relocs **) vpp;
3827 }
3828
3829 p = *head;
3830 if (p == NULL || p->sec != sec)
3831 {
3832 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3833 if (p == NULL)
3834 return FALSE;
3835 p->next = *head;
3836 *head = p;
3837 p->sec = sec;
3838 p->count = 0;
3839 p->pc_count = 0;
3840 }
3841
3842 p->count += 1;
3843 if (!must_be_dyn_reloc (info, r_type))
3844 p->pc_count += 1;
3845 }
3846
3847 break;
3848 }
3849 }
3850
3851 return TRUE;
3852 }
3853 \f
3854
3855 /* Merge object attributes from IBFD into OBFD. Raise an error if
3856 there are conflicting attributes. */
3857 static bfd_boolean
3858 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3859 {
3860 obj_attribute *in_attr, *in_attrs;
3861 obj_attribute *out_attr, *out_attrs;
3862
3863 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3864 {
3865 /* This is the first object. Copy the attributes. */
3866 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3867
3868 /* Use the Tag_null value to indicate the attributes have been
3869 initialized. */
3870 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3871
3872 return TRUE;
3873 }
3874
3875 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3876 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3877
3878 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3879 non-conflicting ones. */
3880 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3881 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3882 if (in_attr->i != out_attr->i)
3883 {
3884 out_attr->type = 1;
3885 if (out_attr->i == 0)
3886 out_attr->i = in_attr->i;
3887 else if (in_attr->i == 0)
3888 ;
3889 else if (out_attr->i == 1 && in_attr->i == 2)
3890 _bfd_error_handler
3891 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3892 else if (out_attr->i == 1 && in_attr->i == 3)
3893 _bfd_error_handler
3894 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3895 obfd, ibfd);
3896 else if (out_attr->i == 3 && in_attr->i == 1)
3897 _bfd_error_handler
3898 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3899 ibfd, obfd);
3900 else if (out_attr->i == 3 && in_attr->i == 2)
3901 _bfd_error_handler
3902 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3903 ibfd, obfd);
3904 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3905 _bfd_error_handler
3906 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3907 else if (in_attr->i > 3)
3908 _bfd_error_handler
3909 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3910 in_attr->i);
3911 else
3912 _bfd_error_handler
3913 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3914 out_attr->i);
3915 }
3916
3917 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3918 merge non-conflicting ones. */
3919 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3920 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3921 if (in_attr->i != out_attr->i)
3922 {
3923 const char *in_abi = NULL, *out_abi = NULL;
3924
3925 switch (in_attr->i)
3926 {
3927 case 1: in_abi = "generic"; break;
3928 case 2: in_abi = "AltiVec"; break;
3929 case 3: in_abi = "SPE"; break;
3930 }
3931
3932 switch (out_attr->i)
3933 {
3934 case 1: out_abi = "generic"; break;
3935 case 2: out_abi = "AltiVec"; break;
3936 case 3: out_abi = "SPE"; break;
3937 }
3938
3939 out_attr->type = 1;
3940 if (out_attr->i == 0)
3941 out_attr->i = in_attr->i;
3942 else if (in_attr->i == 0)
3943 ;
3944 /* For now, allow generic to transition to AltiVec or SPE
3945 without a warning. If GCC marked files with their stack
3946 alignment and used don't-care markings for files which are
3947 not affected by the vector ABI, we could warn about this
3948 case too. */
3949 else if (out_attr->i == 1)
3950 out_attr->i = in_attr->i;
3951 else if (in_attr->i == 1)
3952 ;
3953 else if (in_abi == NULL)
3954 _bfd_error_handler
3955 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3956 in_attr->i);
3957 else if (out_abi == NULL)
3958 _bfd_error_handler
3959 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3960 in_attr->i);
3961 else
3962 _bfd_error_handler
3963 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3964 ibfd, obfd, in_abi, out_abi);
3965 }
3966
3967 /* Merge Tag_compatibility attributes and any common GNU ones. */
3968 _bfd_elf_merge_object_attributes (ibfd, obfd);
3969
3970 return TRUE;
3971 }
3972
3973 /* Merge backend specific data from an object file to the output
3974 object file when linking. */
3975
3976 static bfd_boolean
3977 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3978 {
3979 flagword old_flags;
3980 flagword new_flags;
3981 bfd_boolean error;
3982
3983 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3984 return TRUE;
3985
3986 /* Check if we have the same endianess. */
3987 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3988 return FALSE;
3989
3990 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3991 return FALSE;
3992
3993 new_flags = elf_elfheader (ibfd)->e_flags;
3994 old_flags = elf_elfheader (obfd)->e_flags;
3995 if (!elf_flags_init (obfd))
3996 {
3997 /* First call, no flags set. */
3998 elf_flags_init (obfd) = TRUE;
3999 elf_elfheader (obfd)->e_flags = new_flags;
4000 }
4001
4002 /* Compatible flags are ok. */
4003 else if (new_flags == old_flags)
4004 ;
4005
4006 /* Incompatible flags. */
4007 else
4008 {
4009 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4010 to be linked with either. */
4011 error = FALSE;
4012 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4013 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4014 {
4015 error = TRUE;
4016 (*_bfd_error_handler)
4017 (_("%B: compiled with -mrelocatable and linked with "
4018 "modules compiled normally"), ibfd);
4019 }
4020 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4021 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4022 {
4023 error = TRUE;
4024 (*_bfd_error_handler)
4025 (_("%B: compiled normally and linked with "
4026 "modules compiled with -mrelocatable"), ibfd);
4027 }
4028
4029 /* The output is -mrelocatable-lib iff both the input files are. */
4030 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4031 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4032
4033 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4034 but each input file is either -mrelocatable or -mrelocatable-lib. */
4035 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4036 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4037 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4038 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4039
4040 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4041 any module uses it. */
4042 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4043
4044 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4045 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4046
4047 /* Warn about any other mismatches. */
4048 if (new_flags != old_flags)
4049 {
4050 error = TRUE;
4051 (*_bfd_error_handler)
4052 (_("%B: uses different e_flags (0x%lx) fields "
4053 "than previous modules (0x%lx)"),
4054 ibfd, (long) new_flags, (long) old_flags);
4055 }
4056
4057 if (error)
4058 {
4059 bfd_set_error (bfd_error_bad_value);
4060 return FALSE;
4061 }
4062 }
4063
4064 return TRUE;
4065 }
4066 \f
4067 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4068 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4069 int
4070 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4071 struct bfd_link_info *info,
4072 enum ppc_elf_plt_type plt_style,
4073 int emit_stub_syms)
4074 {
4075 struct ppc_elf_link_hash_table *htab;
4076 flagword flags;
4077
4078 htab = ppc_elf_hash_table (info);
4079
4080 if (htab->plt_type == PLT_UNSET)
4081 {
4082 if (plt_style == PLT_OLD)
4083 htab->plt_type = PLT_OLD;
4084 else
4085 {
4086 bfd *ibfd;
4087 enum ppc_elf_plt_type plt_type = plt_style;
4088
4089 /* Look through the reloc flags left by ppc_elf_check_relocs.
4090 Use the old style bss plt if a file makes plt calls
4091 without using the new relocs, and if ld isn't given
4092 --secure-plt and we never see REL16 relocs. */
4093 if (plt_type == PLT_UNSET)
4094 plt_type = PLT_OLD;
4095 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4096 if (is_ppc_elf (ibfd))
4097 {
4098 if (ppc_elf_tdata (ibfd)->has_rel16)
4099 plt_type = PLT_NEW;
4100 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4101 {
4102 plt_type = PLT_OLD;
4103 htab->old_bfd = ibfd;
4104 break;
4105 }
4106 }
4107 htab->plt_type = plt_type;
4108 }
4109 }
4110 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4111 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4112
4113 htab->emit_stub_syms = emit_stub_syms;
4114
4115 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4116
4117 if (htab->plt_type == PLT_NEW)
4118 {
4119 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4120 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4121
4122 /* The new PLT is a loaded section. */
4123 if (htab->plt != NULL
4124 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4125 return -1;
4126
4127 /* The new GOT is not executable. */
4128 if (htab->got != NULL
4129 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4130 return -1;
4131 }
4132 else
4133 {
4134 /* Stop an unused .glink section from affecting .text alignment. */
4135 if (htab->glink != NULL
4136 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4137 return -1;
4138 }
4139 return htab->plt_type == PLT_NEW;
4140 }
4141 \f
4142 /* Return the section that should be marked against GC for a given
4143 relocation. */
4144
4145 static asection *
4146 ppc_elf_gc_mark_hook (asection *sec,
4147 struct bfd_link_info *info,
4148 Elf_Internal_Rela *rel,
4149 struct elf_link_hash_entry *h,
4150 Elf_Internal_Sym *sym)
4151 {
4152 if (h != NULL)
4153 switch (ELF32_R_TYPE (rel->r_info))
4154 {
4155 case R_PPC_GNU_VTINHERIT:
4156 case R_PPC_GNU_VTENTRY:
4157 return NULL;
4158 }
4159
4160 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4161 }
4162
4163 /* Update the got, plt and dynamic reloc reference counts for the
4164 section being removed. */
4165
4166 static bfd_boolean
4167 ppc_elf_gc_sweep_hook (bfd *abfd,
4168 struct bfd_link_info *info,
4169 asection *sec,
4170 const Elf_Internal_Rela *relocs)
4171 {
4172 struct ppc_elf_link_hash_table *htab;
4173 Elf_Internal_Shdr *symtab_hdr;
4174 struct elf_link_hash_entry **sym_hashes;
4175 bfd_signed_vma *local_got_refcounts;
4176 const Elf_Internal_Rela *rel, *relend;
4177 asection *got2;
4178
4179 if (info->relocatable)
4180 return TRUE;
4181
4182 if ((sec->flags & SEC_ALLOC) == 0)
4183 return TRUE;
4184
4185 elf_section_data (sec)->local_dynrel = NULL;
4186
4187 htab = ppc_elf_hash_table (info);
4188 symtab_hdr = &elf_symtab_hdr (abfd);
4189 sym_hashes = elf_sym_hashes (abfd);
4190 local_got_refcounts = elf_local_got_refcounts (abfd);
4191 got2 = bfd_get_section_by_name (abfd, ".got2");
4192
4193 relend = relocs + sec->reloc_count;
4194 for (rel = relocs; rel < relend; rel++)
4195 {
4196 unsigned long r_symndx;
4197 enum elf_ppc_reloc_type r_type;
4198 struct elf_link_hash_entry *h = NULL;
4199
4200 r_symndx = ELF32_R_SYM (rel->r_info);
4201 if (r_symndx >= symtab_hdr->sh_info)
4202 {
4203 struct ppc_elf_dyn_relocs **pp, *p;
4204 struct ppc_elf_link_hash_entry *eh;
4205
4206 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4207 while (h->root.type == bfd_link_hash_indirect
4208 || h->root.type == bfd_link_hash_warning)
4209 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4210 eh = (struct ppc_elf_link_hash_entry *) h;
4211
4212 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4213 if (p->sec == sec)
4214 {
4215 /* Everything must go for SEC. */
4216 *pp = p->next;
4217 break;
4218 }
4219 }
4220
4221 r_type = ELF32_R_TYPE (rel->r_info);
4222 switch (r_type)
4223 {
4224 case R_PPC_GOT_TLSLD16:
4225 case R_PPC_GOT_TLSLD16_LO:
4226 case R_PPC_GOT_TLSLD16_HI:
4227 case R_PPC_GOT_TLSLD16_HA:
4228 case R_PPC_GOT_TLSGD16:
4229 case R_PPC_GOT_TLSGD16_LO:
4230 case R_PPC_GOT_TLSGD16_HI:
4231 case R_PPC_GOT_TLSGD16_HA:
4232 case R_PPC_GOT_TPREL16:
4233 case R_PPC_GOT_TPREL16_LO:
4234 case R_PPC_GOT_TPREL16_HI:
4235 case R_PPC_GOT_TPREL16_HA:
4236 case R_PPC_GOT_DTPREL16:
4237 case R_PPC_GOT_DTPREL16_LO:
4238 case R_PPC_GOT_DTPREL16_HI:
4239 case R_PPC_GOT_DTPREL16_HA:
4240 case R_PPC_GOT16:
4241 case R_PPC_GOT16_LO:
4242 case R_PPC_GOT16_HI:
4243 case R_PPC_GOT16_HA:
4244 if (h != NULL)
4245 {
4246 if (h->got.refcount > 0)
4247 h->got.refcount--;
4248 }
4249 else if (local_got_refcounts != NULL)
4250 {
4251 if (local_got_refcounts[r_symndx] > 0)
4252 local_got_refcounts[r_symndx]--;
4253 }
4254 break;
4255
4256 case R_PPC_REL24:
4257 case R_PPC_REL14:
4258 case R_PPC_REL14_BRTAKEN:
4259 case R_PPC_REL14_BRNTAKEN:
4260 case R_PPC_REL32:
4261 if (h == NULL || h == htab->elf.hgot)
4262 break;
4263 /* Fall thru */
4264
4265 case R_PPC_ADDR32:
4266 case R_PPC_ADDR24:
4267 case R_PPC_ADDR16:
4268 case R_PPC_ADDR16_LO:
4269 case R_PPC_ADDR16_HI:
4270 case R_PPC_ADDR16_HA:
4271 case R_PPC_ADDR14:
4272 case R_PPC_ADDR14_BRTAKEN:
4273 case R_PPC_ADDR14_BRNTAKEN:
4274 case R_PPC_UADDR32:
4275 case R_PPC_UADDR16:
4276 if (info->shared)
4277 break;
4278
4279 case R_PPC_PLT32:
4280 case R_PPC_PLTREL24:
4281 case R_PPC_PLTREL32:
4282 case R_PPC_PLT16_LO:
4283 case R_PPC_PLT16_HI:
4284 case R_PPC_PLT16_HA:
4285 if (h != NULL)
4286 {
4287 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4288 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4289 if (ent->plt.refcount > 0)
4290 ent->plt.refcount -= 1;
4291 }
4292 break;
4293
4294 default:
4295 break;
4296 }
4297 }
4298 return TRUE;
4299 }
4300 \f
4301 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4302
4303 asection *
4304 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4305 {
4306 struct ppc_elf_link_hash_table *htab;
4307
4308 htab = ppc_elf_hash_table (info);
4309 if (htab->plt_type == PLT_NEW
4310 && htab->plt != NULL
4311 && htab->plt->output_section != NULL)
4312 {
4313 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4314 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4315 }
4316
4317 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4318 FALSE, FALSE, TRUE);
4319 return _bfd_elf_tls_setup (obfd, info);
4320 }
4321
4322 /* Run through all the TLS relocs looking for optimization
4323 opportunities. */
4324
4325 bfd_boolean
4326 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4327 struct bfd_link_info *info)
4328 {
4329 bfd *ibfd;
4330 asection *sec;
4331 struct ppc_elf_link_hash_table *htab;
4332 int pass;
4333
4334 if (info->relocatable || !info->executable)
4335 return TRUE;
4336
4337 htab = ppc_elf_hash_table (info);
4338 /* Make two passes through the relocs. First time check that tls
4339 relocs involved in setting up a tls_get_addr call are indeed
4340 followed by such a call. If they are not, exclude them from
4341 the optimizations done on the second pass. */
4342 for (pass = 0; pass < 2; ++pass)
4343 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4344 {
4345 Elf_Internal_Sym *locsyms = NULL;
4346 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4347
4348 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4349 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4350 {
4351 Elf_Internal_Rela *relstart, *rel, *relend;
4352
4353 /* Read the relocations. */
4354 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4355 info->keep_memory);
4356 if (relstart == NULL)
4357 return FALSE;
4358
4359 relend = relstart + sec->reloc_count;
4360 for (rel = relstart; rel < relend; rel++)
4361 {
4362 enum elf_ppc_reloc_type r_type;
4363 unsigned long r_symndx;
4364 struct elf_link_hash_entry *h = NULL;
4365 char *tls_mask;
4366 char tls_set, tls_clear;
4367 bfd_boolean is_local;
4368 int expecting_tls_get_addr;
4369 bfd_signed_vma *got_count;
4370
4371 r_symndx = ELF32_R_SYM (rel->r_info);
4372 if (r_symndx >= symtab_hdr->sh_info)
4373 {
4374 struct elf_link_hash_entry **sym_hashes;
4375
4376 sym_hashes = elf_sym_hashes (ibfd);
4377 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4378 while (h->root.type == bfd_link_hash_indirect
4379 || h->root.type == bfd_link_hash_warning)
4380 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4381 }
4382
4383 expecting_tls_get_addr = 0;
4384 is_local = FALSE;
4385 if (h == NULL
4386 || !h->def_dynamic)
4387 is_local = TRUE;
4388
4389 r_type = ELF32_R_TYPE (rel->r_info);
4390 switch (r_type)
4391 {
4392 case R_PPC_GOT_TLSLD16:
4393 case R_PPC_GOT_TLSLD16_LO:
4394 expecting_tls_get_addr = 1;
4395 /* Fall thru */
4396
4397 case R_PPC_GOT_TLSLD16_HI:
4398 case R_PPC_GOT_TLSLD16_HA:
4399 /* These relocs should never be against a symbol
4400 defined in a shared lib. Leave them alone if
4401 that turns out to be the case. */
4402 if (!is_local)
4403 continue;
4404
4405 /* LD -> LE */
4406 tls_set = 0;
4407 tls_clear = TLS_LD;
4408 break;
4409
4410 case R_PPC_GOT_TLSGD16:
4411 case R_PPC_GOT_TLSGD16_LO:
4412 expecting_tls_get_addr = 1;
4413 /* Fall thru */
4414
4415 case R_PPC_GOT_TLSGD16_HI:
4416 case R_PPC_GOT_TLSGD16_HA:
4417 if (is_local)
4418 /* GD -> LE */
4419 tls_set = 0;
4420 else
4421 /* GD -> IE */
4422 tls_set = TLS_TLS | TLS_TPRELGD;
4423 tls_clear = TLS_GD;
4424 break;
4425
4426 case R_PPC_GOT_TPREL16:
4427 case R_PPC_GOT_TPREL16_LO:
4428 case R_PPC_GOT_TPREL16_HI:
4429 case R_PPC_GOT_TPREL16_HA:
4430 if (is_local)
4431 {
4432 /* IE -> LE */
4433 tls_set = 0;
4434 tls_clear = TLS_TPREL;
4435 break;
4436 }
4437 else
4438 continue;
4439
4440 default:
4441 continue;
4442 }
4443
4444 if (pass == 0)
4445 {
4446 if (!expecting_tls_get_addr)
4447 continue;
4448
4449 if (rel + 1 < relend)
4450 {
4451 enum elf_ppc_reloc_type r_type2;
4452 unsigned long r_symndx2;
4453 struct elf_link_hash_entry *h2;
4454
4455 /* The next instruction should be a call to
4456 __tls_get_addr. Peek at the reloc to be sure. */
4457 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4458 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4459 if (r_symndx2 >= symtab_hdr->sh_info
4460 && (r_type2 == R_PPC_REL14
4461 || r_type2 == R_PPC_REL14_BRTAKEN
4462 || r_type2 == R_PPC_REL14_BRNTAKEN
4463 || r_type2 == R_PPC_REL24
4464 || r_type2 == R_PPC_PLTREL24))
4465 {
4466 struct elf_link_hash_entry **sym_hashes;
4467
4468 sym_hashes = elf_sym_hashes (ibfd);
4469 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4470 while (h2->root.type == bfd_link_hash_indirect
4471 || h2->root.type == bfd_link_hash_warning)
4472 h2 = ((struct elf_link_hash_entry *)
4473 h2->root.u.i.link);
4474 if (h2 == htab->tls_get_addr)
4475 continue;
4476 }
4477 }
4478
4479 /* Uh oh, we didn't find the expected call. We
4480 could just mark this symbol to exclude it
4481 from tls optimization but it's safer to skip
4482 the entire section. */
4483 sec->has_tls_reloc = 0;
4484 break;
4485 }
4486
4487 if (h != NULL)
4488 {
4489 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4490 got_count = &h->got.refcount;
4491 }
4492 else
4493 {
4494 Elf_Internal_Sym *sym;
4495 bfd_signed_vma *lgot_refs;
4496 char *lgot_masks;
4497
4498 if (locsyms == NULL)
4499 {
4500 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4501 if (locsyms == NULL)
4502 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4503 symtab_hdr->sh_info,
4504 0, NULL, NULL, NULL);
4505 if (locsyms == NULL)
4506 {
4507 if (elf_section_data (sec)->relocs != relstart)
4508 free (relstart);
4509 return FALSE;
4510 }
4511 }
4512 sym = locsyms + r_symndx;
4513 lgot_refs = elf_local_got_refcounts (ibfd);
4514 if (lgot_refs == NULL)
4515 abort ();
4516 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4517 tls_mask = &lgot_masks[r_symndx];
4518 got_count = &lgot_refs[r_symndx];
4519 }
4520
4521 if (tls_set == 0)
4522 {
4523 /* We managed to get rid of a got entry. */
4524 if (*got_count > 0)
4525 *got_count -= 1;
4526 }
4527
4528 if (expecting_tls_get_addr)
4529 {
4530 struct plt_entry *ent;
4531
4532 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4533 if (ent != NULL && ent->plt.refcount > 0)
4534 ent->plt.refcount -= 1;
4535 }
4536
4537 *tls_mask |= tls_set;
4538 *tls_mask &= ~tls_clear;
4539 }
4540
4541 if (elf_section_data (sec)->relocs != relstart)
4542 free (relstart);
4543 }
4544
4545 if (locsyms != NULL
4546 && (symtab_hdr->contents != (unsigned char *) locsyms))
4547 {
4548 if (!info->keep_memory)
4549 free (locsyms);
4550 else
4551 symtab_hdr->contents = (unsigned char *) locsyms;
4552 }
4553 }
4554 return TRUE;
4555 }
4556 \f
4557 /* Return true if we have dynamic relocs that apply to read-only sections. */
4558
4559 static bfd_boolean
4560 readonly_dynrelocs (struct elf_link_hash_entry *h)
4561 {
4562 struct ppc_elf_dyn_relocs *p;
4563
4564 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4565 {
4566 asection *s = p->sec->output_section;
4567
4568 if (s != NULL
4569 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4570 == (SEC_READONLY | SEC_ALLOC)))
4571 return TRUE;
4572 }
4573 return FALSE;
4574 }
4575
4576 /* Adjust a symbol defined by a dynamic object and referenced by a
4577 regular object. The current definition is in some section of the
4578 dynamic object, but we're not including those sections. We have to
4579 change the definition to something the rest of the link can
4580 understand. */
4581
4582 static bfd_boolean
4583 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4584 struct elf_link_hash_entry *h)
4585 {
4586 struct ppc_elf_link_hash_table *htab;
4587 asection *s;
4588
4589 #ifdef DEBUG
4590 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4591 h->root.root.string);
4592 #endif
4593
4594 /* Make sure we know what is going on here. */
4595 htab = ppc_elf_hash_table (info);
4596 BFD_ASSERT (htab->elf.dynobj != NULL
4597 && (h->needs_plt
4598 || h->u.weakdef != NULL
4599 || (h->def_dynamic
4600 && h->ref_regular
4601 && !h->def_regular)));
4602
4603 /* Deal with function syms. */
4604 if (h->type == STT_FUNC
4605 || h->needs_plt)
4606 {
4607 /* Clear procedure linkage table information for any symbol that
4608 won't need a .plt entry. */
4609 struct plt_entry *ent;
4610 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4611 if (ent->plt.refcount > 0)
4612 break;
4613 if (ent == NULL
4614 || SYMBOL_CALLS_LOCAL (info, h)
4615 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4616 && h->root.type == bfd_link_hash_undefweak))
4617 {
4618 /* A PLT entry is not required/allowed when:
4619
4620 1. We are not using ld.so; because then the PLT entry
4621 can't be set up, so we can't use one. In this case,
4622 ppc_elf_adjust_dynamic_symbol won't even be called.
4623
4624 2. GC has rendered the entry unused.
4625
4626 3. We know for certain that a call to this symbol
4627 will go to this object, or will remain undefined. */
4628 h->plt.plist = NULL;
4629 h->needs_plt = 0;
4630 }
4631 else
4632 {
4633 /* After adjust_dynamic_symbol, non_got_ref set means that
4634 dyn_relocs for this symbol should be discarded.
4635 If we get here we know we are making a PLT entry for this
4636 symbol, and in an executable we'd normally resolve
4637 relocations against this symbol to the PLT entry. Allow
4638 dynamic relocs if the reference is weak, and the dynamic
4639 relocs will not cause text relocation. */
4640 if (!h->ref_regular_nonweak
4641 && h->non_got_ref
4642 && !htab->is_vxworks
4643 && !ppc_elf_hash_entry (h)->has_sda_refs
4644 && !readonly_dynrelocs (h))
4645 h->non_got_ref = 0;
4646 }
4647 return TRUE;
4648 }
4649 else
4650 h->plt.plist = NULL;
4651
4652 /* If this is a weak symbol, and there is a real definition, the
4653 processor independent code will have arranged for us to see the
4654 real definition first, and we can just use the same value. */
4655 if (h->u.weakdef != NULL)
4656 {
4657 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4658 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4659 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4660 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4661 if (ELIMINATE_COPY_RELOCS)
4662 h->non_got_ref = h->u.weakdef->non_got_ref;
4663 return TRUE;
4664 }
4665
4666 /* This is a reference to a symbol defined by a dynamic object which
4667 is not a function. */
4668
4669 /* If we are creating a shared library, we must presume that the
4670 only references to the symbol are via the global offset table.
4671 For such cases we need not do anything here; the relocations will
4672 be handled correctly by relocate_section. */
4673 if (info->shared)
4674 return TRUE;
4675
4676 /* If there are no references to this symbol that do not use the
4677 GOT, we don't need to generate a copy reloc. */
4678 if (!h->non_got_ref)
4679 return TRUE;
4680
4681 /* If we didn't find any dynamic relocs in read-only sections, then
4682 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4683 We can't do this if there are any small data relocations. This
4684 doesn't work on VxWorks, where we can not have dynamic
4685 relocations (other than copy and jump slot relocations) in an
4686 executable. */
4687 if (ELIMINATE_COPY_RELOCS
4688 && !ppc_elf_hash_entry (h)->has_sda_refs
4689 && !htab->is_vxworks
4690 && !h->def_regular
4691 && !readonly_dynrelocs (h))
4692 {
4693 h->non_got_ref = 0;
4694 return TRUE;
4695 }
4696
4697 if (h->size == 0)
4698 {
4699 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4700 h->root.root.string);
4701 return TRUE;
4702 }
4703
4704 /* We must allocate the symbol in our .dynbss section, which will
4705 become part of the .bss section of the executable. There will be
4706 an entry for this symbol in the .dynsym section. The dynamic
4707 object will contain position independent code, so all references
4708 from the dynamic object to this symbol will go through the global
4709 offset table. The dynamic linker will use the .dynsym entry to
4710 determine the address it must put in the global offset table, so
4711 both the dynamic object and the regular object will refer to the
4712 same memory location for the variable.
4713
4714 Of course, if the symbol is referenced using SDAREL relocs, we
4715 must instead allocate it in .sbss. */
4716
4717 if (ppc_elf_hash_entry (h)->has_sda_refs)
4718 s = htab->dynsbss;
4719 else
4720 s = htab->dynbss;
4721 BFD_ASSERT (s != NULL);
4722
4723 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4724 copy the initial value out of the dynamic object and into the
4725 runtime process image. We need to remember the offset into the
4726 .rela.bss section we are going to use. */
4727 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4728 {
4729 asection *srel;
4730
4731 if (ppc_elf_hash_entry (h)->has_sda_refs)
4732 srel = htab->relsbss;
4733 else
4734 srel = htab->relbss;
4735 BFD_ASSERT (srel != NULL);
4736 srel->size += sizeof (Elf32_External_Rela);
4737 h->needs_copy = 1;
4738 }
4739
4740 return _bfd_elf_adjust_dynamic_copy (h, s);
4741 }
4742 \f
4743 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4744 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4745 specifying the addend on the plt relocation. For -fpic code, the sym
4746 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4747 xxxxxxxx.got2.plt_pic32.<callee>. */
4748
4749 static bfd_boolean
4750 add_stub_sym (struct plt_entry *ent,
4751 struct elf_link_hash_entry *h,
4752 struct bfd_link_info *info)
4753 {
4754 struct elf_link_hash_entry *sh;
4755 size_t len1, len2, len3;
4756 char *name;
4757 const char *stub;
4758 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4759
4760 if (info->shared || info->pie)
4761 stub = ".plt_pic32.";
4762 else
4763 stub = ".plt_call32.";
4764
4765 len1 = strlen (h->root.root.string);
4766 len2 = strlen (stub);
4767 len3 = 0;
4768 if (ent->sec)
4769 len3 = strlen (ent->sec->name);
4770 name = bfd_malloc (len1 + len2 + len3 + 9);
4771 if (name == NULL)
4772 return FALSE;
4773 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4774 if (ent->sec)
4775 memcpy (name + 8, ent->sec->name, len3);
4776 memcpy (name + 8 + len3, stub, len2);
4777 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4778 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4779 if (sh == NULL)
4780 return FALSE;
4781 if (sh->root.type == bfd_link_hash_new)
4782 {
4783 sh->root.type = bfd_link_hash_defined;
4784 sh->root.u.def.section = htab->glink;
4785 sh->root.u.def.value = ent->glink_offset;
4786 sh->ref_regular = 1;
4787 sh->def_regular = 1;
4788 sh->ref_regular_nonweak = 1;
4789 sh->forced_local = 1;
4790 sh->non_elf = 0;
4791 }
4792 return TRUE;
4793 }
4794
4795 /* Allocate NEED contiguous space in .got, and return the offset.
4796 Handles allocation of the got header when crossing 32k. */
4797
4798 static bfd_vma
4799 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4800 {
4801 bfd_vma where;
4802 unsigned int max_before_header;
4803
4804 if (htab->plt_type == PLT_VXWORKS)
4805 {
4806 where = htab->got->size;
4807 htab->got->size += need;
4808 }
4809 else
4810 {
4811 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4812 if (need <= htab->got_gap)
4813 {
4814 where = max_before_header - htab->got_gap;
4815 htab->got_gap -= need;
4816 }
4817 else
4818 {
4819 if (htab->got->size + need > max_before_header
4820 && htab->got->size <= max_before_header)
4821 {
4822 htab->got_gap = max_before_header - htab->got->size;
4823 htab->got->size = max_before_header + htab->got_header_size;
4824 }
4825 where = htab->got->size;
4826 htab->got->size += need;
4827 }
4828 }
4829 return where;
4830 }
4831
4832 /* Allocate space in associated reloc sections for dynamic relocs. */
4833
4834 static bfd_boolean
4835 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4836 {
4837 struct bfd_link_info *info = inf;
4838 struct ppc_elf_link_hash_entry *eh;
4839 struct ppc_elf_link_hash_table *htab;
4840 struct ppc_elf_dyn_relocs *p;
4841
4842 if (h->root.type == bfd_link_hash_indirect)
4843 return TRUE;
4844
4845 if (h->root.type == bfd_link_hash_warning)
4846 /* When warning symbols are created, they **replace** the "real"
4847 entry in the hash table, thus we never get to see the real
4848 symbol in a hash traversal. So look at it now. */
4849 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4850
4851 htab = ppc_elf_hash_table (info);
4852 if (htab->elf.dynamic_sections_created)
4853 {
4854 struct plt_entry *ent;
4855 bfd_boolean doneone = FALSE;
4856 bfd_vma plt_offset = 0, glink_offset = 0;
4857
4858 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4859 if (ent->plt.refcount > 0)
4860 {
4861 /* Make sure this symbol is output as a dynamic symbol. */
4862 if (h->dynindx == -1
4863 && !h->forced_local)
4864 {
4865 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4866 return FALSE;
4867 }
4868
4869 if (info->shared
4870 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4871 {
4872 asection *s = htab->plt;
4873
4874 if (htab->plt_type == PLT_NEW)
4875 {
4876 if (!doneone)
4877 {
4878 plt_offset = s->size;
4879 s->size += 4;
4880 }
4881 ent->plt.offset = plt_offset;
4882
4883 s = htab->glink;
4884 if (!doneone || info->shared || info->pie)
4885 {
4886 glink_offset = s->size;
4887 s->size += GLINK_ENTRY_SIZE;
4888 }
4889 if (!doneone
4890 && !info->shared
4891 && h->def_dynamic
4892 && !h->def_regular)
4893 {
4894 h->root.u.def.section = s;
4895 h->root.u.def.value = glink_offset;
4896 }
4897 ent->glink_offset = glink_offset;
4898
4899 if (htab->emit_stub_syms
4900 && !add_stub_sym (ent, h, info))
4901 return FALSE;
4902 }
4903 else
4904 {
4905 if (!doneone)
4906 {
4907 /* If this is the first .plt entry, make room
4908 for the special first entry. */
4909 if (s->size == 0)
4910 s->size += htab->plt_initial_entry_size;
4911
4912 /* The PowerPC PLT is actually composed of two
4913 parts, the first part is 2 words (for a load
4914 and a jump), and then there is a remaining
4915 word available at the end. */
4916 plt_offset = (htab->plt_initial_entry_size
4917 + (htab->plt_slot_size
4918 * ((s->size
4919 - htab->plt_initial_entry_size)
4920 / htab->plt_entry_size)));
4921
4922 /* If this symbol is not defined in a regular
4923 file, and we are not generating a shared
4924 library, then set the symbol to this location
4925 in the .plt. This is required to make
4926 function pointers compare as equal between
4927 the normal executable and the shared library. */
4928 if (! info->shared
4929 && h->def_dynamic
4930 && !h->def_regular)
4931 {
4932 h->root.u.def.section = s;
4933 h->root.u.def.value = plt_offset;
4934 }
4935
4936 /* Make room for this entry. */
4937 s->size += htab->plt_entry_size;
4938 /* After the 8192nd entry, room for two entries
4939 is allocated. */
4940 if (htab->plt_type == PLT_OLD
4941 && (s->size - htab->plt_initial_entry_size)
4942 / htab->plt_entry_size
4943 > PLT_NUM_SINGLE_ENTRIES)
4944 s->size += htab->plt_entry_size;
4945 }
4946 ent->plt.offset = plt_offset;
4947 }
4948
4949 /* We also need to make an entry in the .rela.plt section. */
4950 if (!doneone)
4951 {
4952 htab->relplt->size += sizeof (Elf32_External_Rela);
4953
4954 if (htab->plt_type == PLT_VXWORKS)
4955 {
4956 /* Allocate space for the unloaded relocations. */
4957 if (!info->shared)
4958 {
4959 if (ent->plt.offset
4960 == (bfd_vma) htab->plt_initial_entry_size)
4961 {
4962 htab->srelplt2->size
4963 += sizeof (Elf32_External_Rela)
4964 * VXWORKS_PLTRESOLVE_RELOCS;
4965 }
4966
4967 htab->srelplt2->size
4968 += sizeof (Elf32_External_Rela)
4969 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4970 }
4971
4972 /* Every PLT entry has an associated GOT entry in
4973 .got.plt. */
4974 htab->sgotplt->size += 4;
4975 }
4976 doneone = TRUE;
4977 }
4978 }
4979 else
4980 ent->plt.offset = (bfd_vma) -1;
4981 }
4982 else
4983 ent->plt.offset = (bfd_vma) -1;
4984
4985 if (!doneone)
4986 {
4987 h->plt.plist = NULL;
4988 h->needs_plt = 0;
4989 }
4990 }
4991 else
4992 {
4993 h->plt.plist = NULL;
4994 h->needs_plt = 0;
4995 }
4996
4997 eh = (struct ppc_elf_link_hash_entry *) h;
4998 if (eh->elf.got.refcount > 0)
4999 {
5000 /* Make sure this symbol is output as a dynamic symbol. */
5001 if (eh->elf.dynindx == -1
5002 && !eh->elf.forced_local
5003 && htab->elf.dynamic_sections_created)
5004 {
5005 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5006 return FALSE;
5007 }
5008
5009 if (eh->tls_mask == (TLS_TLS | TLS_LD)
5010 && !eh->elf.def_dynamic)
5011 {
5012 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
5013 htab->tlsld_got.refcount += 1;
5014 eh->elf.got.offset = (bfd_vma) -1;
5015 }
5016 else
5017 {
5018 bfd_boolean dyn;
5019 unsigned int need = 0;
5020 if ((eh->tls_mask & TLS_TLS) != 0)
5021 {
5022 if ((eh->tls_mask & TLS_LD) != 0)
5023 need += 8;
5024 if ((eh->tls_mask & TLS_GD) != 0)
5025 need += 8;
5026 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5027 need += 4;
5028 if ((eh->tls_mask & TLS_DTPREL) != 0)
5029 need += 4;
5030 }
5031 else
5032 need += 4;
5033 eh->elf.got.offset = allocate_got (htab, need);
5034 dyn = htab->elf.dynamic_sections_created;
5035 if ((info->shared
5036 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5037 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5038 || eh->elf.root.type != bfd_link_hash_undefweak))
5039 {
5040 /* All the entries we allocated need relocs.
5041 Except LD only needs one. */
5042 if ((eh->tls_mask & TLS_LD) != 0)
5043 need -= 4;
5044 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5045 }
5046 }
5047 }
5048 else
5049 eh->elf.got.offset = (bfd_vma) -1;
5050
5051 if (eh->dyn_relocs == NULL
5052 || !htab->elf.dynamic_sections_created)
5053 return TRUE;
5054
5055 /* In the shared -Bsymbolic case, discard space allocated for
5056 dynamic pc-relative relocs against symbols which turn out to be
5057 defined in regular objects. For the normal shared case, discard
5058 space for relocs that have become local due to symbol visibility
5059 changes. */
5060
5061 if (info->shared)
5062 {
5063 /* Relocs that use pc_count are those that appear on a call insn,
5064 or certain REL relocs (see must_be_dyn_reloc) that can be
5065 generated via assembly. We want calls to protected symbols to
5066 resolve directly to the function rather than going via the plt.
5067 If people want function pointer comparisons to work as expected
5068 then they should avoid writing weird assembly. */
5069 if (SYMBOL_CALLS_LOCAL (info, h))
5070 {
5071 struct ppc_elf_dyn_relocs **pp;
5072
5073 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5074 {
5075 p->count -= p->pc_count;
5076 p->pc_count = 0;
5077 if (p->count == 0)
5078 *pp = p->next;
5079 else
5080 pp = &p->next;
5081 }
5082 }
5083
5084 if (htab->is_vxworks)
5085 {
5086 struct ppc_elf_dyn_relocs **pp;
5087
5088 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5089 {
5090 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5091 *pp = p->next;
5092 else
5093 pp = &p->next;
5094 }
5095 }
5096
5097 /* Discard relocs on undefined symbols that must be local. */
5098 if (eh->dyn_relocs != NULL
5099 && h->root.type == bfd_link_hash_undefined
5100 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5101 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5102 eh->dyn_relocs = NULL;
5103
5104 /* Also discard relocs on undefined weak syms with non-default
5105 visibility. */
5106 if (eh->dyn_relocs != NULL
5107 && h->root.type == bfd_link_hash_undefweak)
5108 {
5109 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5110 eh->dyn_relocs = NULL;
5111
5112 /* Make sure undefined weak symbols are output as a dynamic
5113 symbol in PIEs. */
5114 else if (h->dynindx == -1
5115 && !h->forced_local)
5116 {
5117 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5118 return FALSE;
5119 }
5120 }
5121 }
5122 else if (ELIMINATE_COPY_RELOCS)
5123 {
5124 /* For the non-shared case, discard space for relocs against
5125 symbols which turn out to need copy relocs or are not
5126 dynamic. */
5127
5128 if (!h->non_got_ref
5129 && !h->def_regular)
5130 {
5131 /* Make sure this symbol is output as a dynamic symbol.
5132 Undefined weak syms won't yet be marked as dynamic. */
5133 if (h->dynindx == -1
5134 && !h->forced_local)
5135 {
5136 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5137 return FALSE;
5138 }
5139
5140 /* If that succeeded, we know we'll be keeping all the
5141 relocs. */
5142 if (h->dynindx != -1)
5143 goto keep;
5144 }
5145
5146 eh->dyn_relocs = NULL;
5147
5148 keep: ;
5149 }
5150
5151 /* Finally, allocate space. */
5152 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5153 {
5154 asection *sreloc = elf_section_data (p->sec)->sreloc;
5155 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5156 }
5157
5158 return TRUE;
5159 }
5160
5161 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5162 read-only sections. */
5163
5164 static bfd_boolean
5165 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5166 {
5167 if (h->root.type == bfd_link_hash_indirect)
5168 return TRUE;
5169
5170 if (h->root.type == bfd_link_hash_warning)
5171 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5172
5173 if (readonly_dynrelocs (h))
5174 {
5175 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5176
5177 /* Not an error, just cut short the traversal. */
5178 return FALSE;
5179 }
5180 return TRUE;
5181 }
5182
5183 /* Set the sizes of the dynamic sections. */
5184
5185 static bfd_boolean
5186 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5187 struct bfd_link_info *info)
5188 {
5189 struct ppc_elf_link_hash_table *htab;
5190 asection *s;
5191 bfd_boolean relocs;
5192 bfd *ibfd;
5193
5194 #ifdef DEBUG
5195 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5196 #endif
5197
5198 htab = ppc_elf_hash_table (info);
5199 BFD_ASSERT (htab->elf.dynobj != NULL);
5200
5201 if (elf_hash_table (info)->dynamic_sections_created)
5202 {
5203 /* Set the contents of the .interp section to the interpreter. */
5204 if (info->executable)
5205 {
5206 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5207 BFD_ASSERT (s != NULL);
5208 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5209 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5210 }
5211 }
5212
5213 if (htab->plt_type == PLT_OLD)
5214 htab->got_header_size = 16;
5215 else if (htab->plt_type == PLT_NEW)
5216 htab->got_header_size = 12;
5217
5218 /* Set up .got offsets for local syms, and space for local dynamic
5219 relocs. */
5220 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5221 {
5222 bfd_signed_vma *local_got;
5223 bfd_signed_vma *end_local_got;
5224 char *lgot_masks;
5225 bfd_size_type locsymcount;
5226 Elf_Internal_Shdr *symtab_hdr;
5227
5228 if (!is_ppc_elf (ibfd))
5229 continue;
5230
5231 for (s = ibfd->sections; s != NULL; s = s->next)
5232 {
5233 struct ppc_elf_dyn_relocs *p;
5234
5235 for (p = ((struct ppc_elf_dyn_relocs *)
5236 elf_section_data (s)->local_dynrel);
5237 p != NULL;
5238 p = p->next)
5239 {
5240 if (!bfd_is_abs_section (p->sec)
5241 && bfd_is_abs_section (p->sec->output_section))
5242 {
5243 /* Input section has been discarded, either because
5244 it is a copy of a linkonce section or due to
5245 linker script /DISCARD/, so we'll be discarding
5246 the relocs too. */
5247 }
5248 else if (htab->is_vxworks
5249 && strcmp (p->sec->output_section->name,
5250 ".tls_vars") == 0)
5251 {
5252 /* Relocations in vxworks .tls_vars sections are
5253 handled specially by the loader. */
5254 }
5255 else if (p->count != 0)
5256 {
5257 elf_section_data (p->sec)->sreloc->size
5258 += p->count * sizeof (Elf32_External_Rela);
5259 if ((p->sec->output_section->flags
5260 & (SEC_READONLY | SEC_ALLOC))
5261 == (SEC_READONLY | SEC_ALLOC))
5262 info->flags |= DF_TEXTREL;
5263 }
5264 }
5265 }
5266
5267 local_got = elf_local_got_refcounts (ibfd);
5268 if (!local_got)
5269 continue;
5270
5271 symtab_hdr = &elf_symtab_hdr (ibfd);
5272 locsymcount = symtab_hdr->sh_info;
5273 end_local_got = local_got + locsymcount;
5274 lgot_masks = (char *) end_local_got;
5275 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5276 if (*local_got > 0)
5277 {
5278 if (*lgot_masks == (TLS_TLS | TLS_LD))
5279 {
5280 /* If just an LD reloc, we'll just use
5281 htab->tlsld_got.offset. */
5282 htab->tlsld_got.refcount += 1;
5283 *local_got = (bfd_vma) -1;
5284 }
5285 else
5286 {
5287 unsigned int need = 0;
5288 if ((*lgot_masks & TLS_TLS) != 0)
5289 {
5290 if ((*lgot_masks & TLS_GD) != 0)
5291 need += 8;
5292 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5293 need += 4;
5294 if ((*lgot_masks & TLS_DTPREL) != 0)
5295 need += 4;
5296 }
5297 else
5298 need += 4;
5299 *local_got = allocate_got (htab, need);
5300 if (info->shared)
5301 htab->relgot->size += (need
5302 * (sizeof (Elf32_External_Rela) / 4));
5303 }
5304 }
5305 else
5306 *local_got = (bfd_vma) -1;
5307 }
5308
5309 /* Allocate space for global sym dynamic relocs. */
5310 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5311
5312 if (htab->tlsld_got.refcount > 0)
5313 {
5314 htab->tlsld_got.offset = allocate_got (htab, 8);
5315 if (info->shared)
5316 htab->relgot->size += sizeof (Elf32_External_Rela);
5317 }
5318 else
5319 htab->tlsld_got.offset = (bfd_vma) -1;
5320
5321 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5322 {
5323 unsigned int g_o_t = 32768;
5324
5325 /* If we haven't allocated the header, do so now. When we get here,
5326 for old plt/got the got size will be 0 to 32764 (not allocated),
5327 or 32780 to 65536 (header allocated). For new plt/got, the
5328 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5329 if (htab->got->size <= 32768)
5330 {
5331 g_o_t = htab->got->size;
5332 if (htab->plt_type == PLT_OLD)
5333 g_o_t += 4;
5334 htab->got->size += htab->got_header_size;
5335 }
5336
5337 htab->elf.hgot->root.u.def.value = g_o_t;
5338 }
5339
5340 if (htab->glink != NULL && htab->glink->size != 0)
5341 {
5342 htab->glink_pltresolve = htab->glink->size;
5343 /* Space for the branch table. */
5344 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5345 /* Pad out to align the start of PLTresolve. */
5346 htab->glink->size += -htab->glink->size & 15;
5347 htab->glink->size += GLINK_PLTRESOLVE;
5348
5349 if (htab->emit_stub_syms)
5350 {
5351 struct elf_link_hash_entry *sh;
5352 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5353 TRUE, FALSE, FALSE);
5354 if (sh == NULL)
5355 return FALSE;
5356 if (sh->root.type == bfd_link_hash_new)
5357 {
5358 sh->root.type = bfd_link_hash_defined;
5359 sh->root.u.def.section = htab->glink;
5360 sh->root.u.def.value = htab->glink_pltresolve;
5361 sh->ref_regular = 1;
5362 sh->def_regular = 1;
5363 sh->ref_regular_nonweak = 1;
5364 sh->forced_local = 1;
5365 sh->non_elf = 0;
5366 }
5367 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5368 TRUE, FALSE, FALSE);
5369 if (sh == NULL)
5370 return FALSE;
5371 if (sh->root.type == bfd_link_hash_new)
5372 {
5373 sh->root.type = bfd_link_hash_defined;
5374 sh->root.u.def.section = htab->glink;
5375 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5376 sh->ref_regular = 1;
5377 sh->def_regular = 1;
5378 sh->ref_regular_nonweak = 1;
5379 sh->forced_local = 1;
5380 sh->non_elf = 0;
5381 }
5382 }
5383 }
5384
5385 /* We've now determined the sizes of the various dynamic sections.
5386 Allocate memory for them. */
5387 relocs = FALSE;
5388 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5389 {
5390 bfd_boolean strip_section = TRUE;
5391
5392 if ((s->flags & SEC_LINKER_CREATED) == 0)
5393 continue;
5394
5395 if (s == htab->plt
5396 || s == htab->glink
5397 || s == htab->got
5398 || s == htab->sgotplt
5399 || s == htab->sbss
5400 || s == htab->dynbss
5401 || s == htab->dynsbss)
5402 {
5403 /* We'd like to strip these sections if they aren't needed, but if
5404 we've exported dynamic symbols from them we must leave them.
5405 It's too late to tell BFD to get rid of the symbols. */
5406 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5407 strip_section = FALSE;
5408 /* Strip this section if we don't need it; see the
5409 comment below. */
5410 }
5411 else if (s == htab->sdata[0].section
5412 || s == htab->sdata[1].section)
5413 {
5414 /* Strip these too. */
5415 }
5416 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5417 {
5418 if (s->size != 0)
5419 {
5420 /* Remember whether there are any relocation sections. */
5421 relocs = TRUE;
5422
5423 /* We use the reloc_count field as a counter if we need
5424 to copy relocs into the output file. */
5425 s->reloc_count = 0;
5426 }
5427 }
5428 else
5429 {
5430 /* It's not one of our sections, so don't allocate space. */
5431 continue;
5432 }
5433
5434 if (s->size == 0 && strip_section)
5435 {
5436 /* If we don't need this section, strip it from the
5437 output file. This is mostly to handle .rela.bss and
5438 .rela.plt. We must create both sections in
5439 create_dynamic_sections, because they must be created
5440 before the linker maps input sections to output
5441 sections. The linker does that before
5442 adjust_dynamic_symbol is called, and it is that
5443 function which decides whether anything needs to go
5444 into these sections. */
5445 s->flags |= SEC_EXCLUDE;
5446 continue;
5447 }
5448
5449 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5450 continue;
5451
5452 /* Allocate memory for the section contents. */
5453 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5454 if (s->contents == NULL)
5455 return FALSE;
5456 }
5457
5458 if (htab->elf.dynamic_sections_created)
5459 {
5460 /* Add some entries to the .dynamic section. We fill in the
5461 values later, in ppc_elf_finish_dynamic_sections, but we
5462 must add the entries now so that we get the correct size for
5463 the .dynamic section. The DT_DEBUG entry is filled in by the
5464 dynamic linker and used by the debugger. */
5465 #define add_dynamic_entry(TAG, VAL) \
5466 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5467
5468 if (info->executable)
5469 {
5470 if (!add_dynamic_entry (DT_DEBUG, 0))
5471 return FALSE;
5472 }
5473
5474 if (htab->plt != NULL && htab->plt->size != 0)
5475 {
5476 if (!add_dynamic_entry (DT_PLTGOT, 0)
5477 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5478 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5479 || !add_dynamic_entry (DT_JMPREL, 0))
5480 return FALSE;
5481 }
5482
5483 if (htab->glink != NULL && htab->glink->size != 0)
5484 {
5485 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5486 return FALSE;
5487 }
5488
5489 if (relocs)
5490 {
5491 if (!add_dynamic_entry (DT_RELA, 0)
5492 || !add_dynamic_entry (DT_RELASZ, 0)
5493 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5494 return FALSE;
5495 }
5496
5497 /* If any dynamic relocs apply to a read-only section, then we
5498 need a DT_TEXTREL entry. */
5499 if ((info->flags & DF_TEXTREL) == 0)
5500 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5501 info);
5502
5503 if ((info->flags & DF_TEXTREL) != 0)
5504 {
5505 if (!add_dynamic_entry (DT_TEXTREL, 0))
5506 return FALSE;
5507 }
5508 if (htab->is_vxworks
5509 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5510 return FALSE;
5511 }
5512 #undef add_dynamic_entry
5513
5514 return TRUE;
5515 }
5516
5517 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5518
5519 static bfd_boolean
5520 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5521 {
5522 if (h->plt.plist != NULL
5523 && !h->def_regular
5524 && (!h->pointer_equality_needed
5525 || !h->ref_regular_nonweak))
5526 return FALSE;
5527
5528 return _bfd_elf_hash_symbol (h);
5529 }
5530 \f
5531 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5532
5533 static const int shared_stub_entry[] =
5534 {
5535 0x7c0802a6, /* mflr 0 */
5536 0x429f0005, /* bcl 20, 31, .Lxxx */
5537 0x7d6802a6, /* mflr 11 */
5538 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5539 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5540 0x7c0803a6, /* mtlr 0 */
5541 0x7d6903a6, /* mtctr 11 */
5542 0x4e800420, /* bctr */
5543 };
5544
5545 static const int stub_entry[] =
5546 {
5547 0x3d600000, /* lis 11,xxx@ha */
5548 0x396b0000, /* addi 11,11,xxx@l */
5549 0x7d6903a6, /* mtctr 11 */
5550 0x4e800420, /* bctr */
5551 };
5552
5553 static bfd_boolean
5554 ppc_elf_relax_section (bfd *abfd,
5555 asection *isec,
5556 struct bfd_link_info *link_info,
5557 bfd_boolean *again)
5558 {
5559 struct one_fixup
5560 {
5561 struct one_fixup *next;
5562 asection *tsec;
5563 bfd_vma toff;
5564 bfd_vma trampoff;
5565 };
5566
5567 Elf_Internal_Shdr *symtab_hdr;
5568 bfd_byte *contents = NULL;
5569 Elf_Internal_Sym *isymbuf = NULL;
5570 Elf_Internal_Rela *internal_relocs = NULL;
5571 Elf_Internal_Rela *irel, *irelend;
5572 struct one_fixup *fixups = NULL;
5573 bfd_boolean changed;
5574 struct ppc_elf_link_hash_table *htab;
5575 bfd_size_type trampoff;
5576 asection *got2;
5577
5578 *again = FALSE;
5579
5580 /* Nothing to do if there are no relocations, and no need to do
5581 anything with non-alloc sections. */
5582 if ((isec->flags & SEC_ALLOC) == 0
5583 || (isec->flags & SEC_RELOC) == 0
5584 || isec->reloc_count == 0)
5585 return TRUE;
5586
5587 trampoff = (isec->size + 3) & (bfd_vma) -4;
5588 /* Space for a branch around any trampolines. */
5589 trampoff += 4;
5590
5591 symtab_hdr = &elf_symtab_hdr (abfd);
5592
5593 /* Get a copy of the native relocations. */
5594 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5595 link_info->keep_memory);
5596 if (internal_relocs == NULL)
5597 goto error_return;
5598
5599 htab = ppc_elf_hash_table (link_info);
5600 got2 = bfd_get_section_by_name (abfd, ".got2");
5601
5602 irelend = internal_relocs + isec->reloc_count;
5603 for (irel = internal_relocs; irel < irelend; irel++)
5604 {
5605 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5606 bfd_vma symaddr, reladdr, toff, roff;
5607 asection *tsec;
5608 struct one_fixup *f;
5609 size_t insn_offset = 0;
5610 bfd_vma max_branch_offset, val;
5611 bfd_byte *hit_addr;
5612 unsigned long t0;
5613 unsigned char sym_type;
5614
5615 switch (r_type)
5616 {
5617 case R_PPC_REL24:
5618 case R_PPC_LOCAL24PC:
5619 case R_PPC_PLTREL24:
5620 max_branch_offset = 1 << 25;
5621 break;
5622
5623 case R_PPC_REL14:
5624 case R_PPC_REL14_BRTAKEN:
5625 case R_PPC_REL14_BRNTAKEN:
5626 max_branch_offset = 1 << 15;
5627 break;
5628
5629 default:
5630 continue;
5631 }
5632
5633 /* Get the value of the symbol referred to by the reloc. */
5634 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5635 {
5636 /* A local symbol. */
5637 Elf_Internal_Sym *isym;
5638
5639 /* Read this BFD's local symbols. */
5640 if (isymbuf == NULL)
5641 {
5642 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5643 if (isymbuf == NULL)
5644 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5645 symtab_hdr->sh_info, 0,
5646 NULL, NULL, NULL);
5647 if (isymbuf == 0)
5648 goto error_return;
5649 }
5650 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5651 if (isym->st_shndx == SHN_UNDEF)
5652 continue; /* We can't do anything with undefined symbols. */
5653 else if (isym->st_shndx == SHN_ABS)
5654 tsec = bfd_abs_section_ptr;
5655 else if (isym->st_shndx == SHN_COMMON)
5656 tsec = bfd_com_section_ptr;
5657 else
5658 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5659
5660 toff = isym->st_value;
5661 sym_type = ELF_ST_TYPE (isym->st_info);
5662 }
5663 else
5664 {
5665 /* Global symbol handling. */
5666 unsigned long indx;
5667 struct elf_link_hash_entry *h;
5668
5669 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5670 h = elf_sym_hashes (abfd)[indx];
5671
5672 while (h->root.type == bfd_link_hash_indirect
5673 || h->root.type == bfd_link_hash_warning)
5674 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5675
5676 tsec = NULL;
5677 toff = 0;
5678 if (r_type == R_PPC_PLTREL24
5679 && htab->plt != NULL)
5680 {
5681 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5682
5683 if (ent != NULL)
5684 {
5685 if (htab->plt_type == PLT_NEW)
5686 {
5687 tsec = htab->glink;
5688 toff = ent->glink_offset;
5689 }
5690 else
5691 {
5692 tsec = htab->plt;
5693 toff = ent->plt.offset;
5694 }
5695 }
5696 }
5697 if (tsec != NULL)
5698 ;
5699 else if (h->root.type == bfd_link_hash_defined
5700 || h->root.type == bfd_link_hash_defweak)
5701 {
5702 tsec = h->root.u.def.section;
5703 toff = h->root.u.def.value;
5704 }
5705 else
5706 continue;
5707
5708 sym_type = h->type;
5709 }
5710
5711 /* If the branch and target are in the same section, you have
5712 no hope of adding stubs. We'll error out later should the
5713 branch overflow. */
5714 if (tsec == isec)
5715 continue;
5716
5717 /* There probably isn't any reason to handle symbols in
5718 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5719 attribute for a code section, and we are only looking at
5720 branches. However, implement it correctly here as a
5721 reference for other target relax_section functions. */
5722 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5723 {
5724 /* At this stage in linking, no SEC_MERGE symbol has been
5725 adjusted, so all references to such symbols need to be
5726 passed through _bfd_merged_section_offset. (Later, in
5727 relocate_section, all SEC_MERGE symbols *except* for
5728 section symbols have been adjusted.)
5729
5730 gas may reduce relocations against symbols in SEC_MERGE
5731 sections to a relocation against the section symbol when
5732 the original addend was zero. When the reloc is against
5733 a section symbol we should include the addend in the
5734 offset passed to _bfd_merged_section_offset, since the
5735 location of interest is the original symbol. On the
5736 other hand, an access to "sym+addend" where "sym" is not
5737 a section symbol should not include the addend; Such an
5738 access is presumed to be an offset from "sym"; The
5739 location of interest is just "sym". */
5740 if (sym_type == STT_SECTION)
5741 toff += irel->r_addend;
5742
5743 toff = _bfd_merged_section_offset (abfd, &tsec,
5744 elf_section_data (tsec)->sec_info,
5745 toff);
5746
5747 if (sym_type != STT_SECTION)
5748 toff += irel->r_addend;
5749 }
5750 /* PLTREL24 addends are special. */
5751 else if (r_type != R_PPC_PLTREL24)
5752 toff += irel->r_addend;
5753
5754 /* Attempted -shared link of non-pic code loses. */
5755 if (tsec->output_section == NULL)
5756 continue;
5757
5758 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5759
5760 roff = irel->r_offset;
5761 reladdr = isec->output_section->vma + isec->output_offset + roff;
5762
5763 /* If the branch is in range, no need to do anything. */
5764 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5765 continue;
5766
5767 /* Look for an existing fixup to this address. */
5768 for (f = fixups; f ; f = f->next)
5769 if (f->tsec == tsec && f->toff == toff)
5770 break;
5771
5772 if (f == NULL)
5773 {
5774 size_t size;
5775 unsigned long stub_rtype;
5776
5777 val = trampoff - roff;
5778 if (val >= max_branch_offset)
5779 /* Oh dear, we can't reach a trampoline. Don't try to add
5780 one. We'll report an error later. */
5781 continue;
5782
5783 if (link_info->shared)
5784 {
5785 size = 4 * ARRAY_SIZE (shared_stub_entry);
5786 insn_offset = 12;
5787 stub_rtype = R_PPC_RELAX32PC;
5788 }
5789 else
5790 {
5791 size = 4 * ARRAY_SIZE (stub_entry);
5792 insn_offset = 0;
5793 stub_rtype = R_PPC_RELAX32;
5794 }
5795
5796 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5797 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5798 abort ();
5799 if (tsec == htab->plt
5800 || tsec == htab->glink)
5801 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5802
5803 /* Hijack the old relocation. Since we need two
5804 relocations for this use a "composite" reloc. */
5805 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5806 stub_rtype);
5807 irel->r_offset = trampoff + insn_offset;
5808 if (r_type == R_PPC_PLTREL24)
5809 irel->r_addend = 0;
5810
5811 /* Record the fixup so we don't do it again this section. */
5812 f = bfd_malloc (sizeof (*f));
5813 f->next = fixups;
5814 f->tsec = tsec;
5815 f->toff = toff;
5816 f->trampoff = trampoff;
5817 fixups = f;
5818
5819 trampoff += size;
5820 }
5821 else
5822 {
5823 val = f->trampoff - roff;
5824 if (val >= max_branch_offset)
5825 continue;
5826
5827 /* Nop out the reloc, since we're finalizing things here. */
5828 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5829 }
5830
5831 /* Get the section contents. */
5832 if (contents == NULL)
5833 {
5834 /* Get cached copy if it exists. */
5835 if (elf_section_data (isec)->this_hdr.contents != NULL)
5836 contents = elf_section_data (isec)->this_hdr.contents;
5837 else
5838 {
5839 /* Go get them off disk. */
5840 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5841 goto error_return;
5842 }
5843 }
5844
5845 /* Fix up the existing branch to hit the trampoline. */
5846 hit_addr = contents + roff;
5847 switch (r_type)
5848 {
5849 case R_PPC_REL24:
5850 case R_PPC_LOCAL24PC:
5851 case R_PPC_PLTREL24:
5852 t0 = bfd_get_32 (abfd, hit_addr);
5853 t0 &= ~0x3fffffc;
5854 t0 |= val & 0x3fffffc;
5855 bfd_put_32 (abfd, t0, hit_addr);
5856 break;
5857
5858 case R_PPC_REL14:
5859 case R_PPC_REL14_BRTAKEN:
5860 case R_PPC_REL14_BRNTAKEN:
5861 t0 = bfd_get_32 (abfd, hit_addr);
5862 t0 &= ~0xfffc;
5863 t0 |= val & 0xfffc;
5864 bfd_put_32 (abfd, t0, hit_addr);
5865 break;
5866 }
5867 }
5868
5869 /* Write out the trampolines. */
5870 changed = fixups != NULL;
5871 if (fixups != NULL)
5872 {
5873 const int *stub;
5874 bfd_byte *dest;
5875 bfd_vma val;
5876 int i, size;
5877
5878 do
5879 {
5880 struct one_fixup *f = fixups;
5881 fixups = fixups->next;
5882 free (f);
5883 }
5884 while (fixups);
5885
5886 contents = bfd_realloc_or_free (contents, trampoff);
5887 if (contents == NULL)
5888 goto error_return;
5889
5890 isec->size = (isec->size + 3) & (bfd_vma) -4;
5891 /* Branch around the trampolines. */
5892 val = B + trampoff - isec->size;
5893 dest = contents + isec->size;
5894 isec->size = trampoff;
5895 bfd_put_32 (abfd, val, dest);
5896 dest += 4;
5897
5898 if (link_info->shared)
5899 {
5900 stub = shared_stub_entry;
5901 size = ARRAY_SIZE (shared_stub_entry);
5902 }
5903 else
5904 {
5905 stub = stub_entry;
5906 size = ARRAY_SIZE (stub_entry);
5907 }
5908
5909 i = 0;
5910 while (dest < contents + trampoff)
5911 {
5912 bfd_put_32 (abfd, stub[i], dest);
5913 i++;
5914 if (i == size)
5915 i = 0;
5916 dest += 4;
5917 }
5918 BFD_ASSERT (i == 0);
5919 }
5920
5921 if (isymbuf != NULL
5922 && symtab_hdr->contents != (unsigned char *) isymbuf)
5923 {
5924 if (! link_info->keep_memory)
5925 free (isymbuf);
5926 else
5927 {
5928 /* Cache the symbols for elf_link_input_bfd. */
5929 symtab_hdr->contents = (unsigned char *) isymbuf;
5930 }
5931 }
5932
5933 if (contents != NULL
5934 && elf_section_data (isec)->this_hdr.contents != contents)
5935 {
5936 if (!changed && !link_info->keep_memory)
5937 free (contents);
5938 else
5939 {
5940 /* Cache the section contents for elf_link_input_bfd. */
5941 elf_section_data (isec)->this_hdr.contents = contents;
5942 }
5943 }
5944
5945 if (elf_section_data (isec)->relocs != internal_relocs)
5946 {
5947 if (!changed)
5948 free (internal_relocs);
5949 else
5950 elf_section_data (isec)->relocs = internal_relocs;
5951 }
5952
5953 *again = changed;
5954 return TRUE;
5955
5956 error_return:
5957 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5958 free (isymbuf);
5959 if (contents != NULL
5960 && elf_section_data (isec)->this_hdr.contents != contents)
5961 free (contents);
5962 if (internal_relocs != NULL
5963 && elf_section_data (isec)->relocs != internal_relocs)
5964 free (internal_relocs);
5965 return FALSE;
5966 }
5967 \f
5968 /* What to do when ld finds relocations against symbols defined in
5969 discarded sections. */
5970
5971 static unsigned int
5972 ppc_elf_action_discarded (asection *sec)
5973 {
5974 if (strcmp (".fixup", sec->name) == 0)
5975 return 0;
5976
5977 if (strcmp (".got2", sec->name) == 0)
5978 return 0;
5979
5980 return _bfd_elf_default_action_discarded (sec);
5981 }
5982 \f
5983 /* Fill in the address for a pointer generated in a linker section. */
5984
5985 static bfd_vma
5986 elf_finish_pointer_linker_section (bfd *input_bfd,
5987 elf_linker_section_t *lsect,
5988 struct elf_link_hash_entry *h,
5989 bfd_vma relocation,
5990 const Elf_Internal_Rela *rel)
5991 {
5992 elf_linker_section_pointers_t *linker_section_ptr;
5993
5994 BFD_ASSERT (lsect != NULL);
5995
5996 if (h != NULL)
5997 {
5998 /* Handle global symbol. */
5999 struct ppc_elf_link_hash_entry *eh;
6000
6001 eh = (struct ppc_elf_link_hash_entry *) h;
6002 BFD_ASSERT (eh->elf.def_regular);
6003 linker_section_ptr = eh->linker_section_pointer;
6004 }
6005 else
6006 {
6007 /* Handle local symbol. */
6008 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6009
6010 BFD_ASSERT (is_ppc_elf (input_bfd));
6011 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6012 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6013 }
6014
6015 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6016 rel->r_addend,
6017 lsect);
6018 BFD_ASSERT (linker_section_ptr != NULL);
6019
6020 /* Offset will always be a multiple of four, so use the bottom bit
6021 as a "written" flag. */
6022 if ((linker_section_ptr->offset & 1) == 0)
6023 {
6024 bfd_put_32 (lsect->section->owner,
6025 relocation + linker_section_ptr->addend,
6026 lsect->section->contents + linker_section_ptr->offset);
6027 linker_section_ptr->offset += 1;
6028 }
6029
6030 relocation = (lsect->section->output_offset
6031 + linker_section_ptr->offset - 1
6032 - 0x8000);
6033
6034 #ifdef DEBUG
6035 fprintf (stderr,
6036 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6037 lsect->name, (long) relocation, (long) relocation);
6038 #endif
6039
6040 /* Subtract out the addend, because it will get added back in by the normal
6041 processing. */
6042 return relocation - linker_section_ptr->addend;
6043 }
6044
6045 /* The RELOCATE_SECTION function is called by the ELF backend linker
6046 to handle the relocations for a section.
6047
6048 The relocs are always passed as Rela structures; if the section
6049 actually uses Rel structures, the r_addend field will always be
6050 zero.
6051
6052 This function is responsible for adjust the section contents as
6053 necessary, and (if using Rela relocs and generating a
6054 relocatable output file) adjusting the reloc addend as
6055 necessary.
6056
6057 This function does not have to worry about setting the reloc
6058 address or the reloc symbol index.
6059
6060 LOCAL_SYMS is a pointer to the swapped in local symbols.
6061
6062 LOCAL_SECTIONS is an array giving the section in the input file
6063 corresponding to the st_shndx field of each local symbol.
6064
6065 The global hash table entry for the global symbols can be found
6066 via elf_sym_hashes (input_bfd).
6067
6068 When generating relocatable output, this function must handle
6069 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6070 going to be the section symbol corresponding to the output
6071 section, which means that the addend must be adjusted
6072 accordingly. */
6073
6074 static bfd_boolean
6075 ppc_elf_relocate_section (bfd *output_bfd,
6076 struct bfd_link_info *info,
6077 bfd *input_bfd,
6078 asection *input_section,
6079 bfd_byte *contents,
6080 Elf_Internal_Rela *relocs,
6081 Elf_Internal_Sym *local_syms,
6082 asection **local_sections)
6083 {
6084 Elf_Internal_Shdr *symtab_hdr;
6085 struct elf_link_hash_entry **sym_hashes;
6086 struct ppc_elf_link_hash_table *htab;
6087 Elf_Internal_Rela *rel;
6088 Elf_Internal_Rela *relend;
6089 Elf_Internal_Rela outrel;
6090 bfd_byte *loc;
6091 asection *got2, *sreloc = NULL;
6092 bfd_vma *local_got_offsets;
6093 bfd_boolean ret = TRUE;
6094 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6095 bfd_boolean is_vxworks_tls;
6096
6097 #ifdef DEBUG
6098 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6099 "%ld relocations%s",
6100 input_bfd, input_section,
6101 (long) input_section->reloc_count,
6102 (info->relocatable) ? " (relocatable)" : "");
6103 #endif
6104
6105 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6106
6107 /* Initialize howto table if not already done. */
6108 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6109 ppc_elf_howto_init ();
6110
6111 htab = ppc_elf_hash_table (info);
6112 local_got_offsets = elf_local_got_offsets (input_bfd);
6113 symtab_hdr = &elf_symtab_hdr (input_bfd);
6114 sym_hashes = elf_sym_hashes (input_bfd);
6115 /* We have to handle relocations in vxworks .tls_vars sections
6116 specially, because the dynamic loader is 'weird'. */
6117 is_vxworks_tls = (htab->is_vxworks && info->shared
6118 && !strcmp (input_section->output_section->name,
6119 ".tls_vars"));
6120 rel = relocs;
6121 relend = relocs + input_section->reloc_count;
6122 for (; rel < relend; rel++)
6123 {
6124 enum elf_ppc_reloc_type r_type;
6125 bfd_vma addend;
6126 bfd_reloc_status_type r;
6127 Elf_Internal_Sym *sym;
6128 asection *sec;
6129 struct elf_link_hash_entry *h;
6130 const char *sym_name;
6131 reloc_howto_type *howto;
6132 unsigned long r_symndx;
6133 bfd_vma relocation;
6134 bfd_vma branch_bit, insn, from;
6135 bfd_boolean unresolved_reloc;
6136 bfd_boolean warned;
6137 unsigned int tls_type, tls_mask, tls_gd;
6138
6139 r_type = ELF32_R_TYPE (rel->r_info);
6140 sym = NULL;
6141 sec = NULL;
6142 h = NULL;
6143 unresolved_reloc = FALSE;
6144 warned = FALSE;
6145 r_symndx = ELF32_R_SYM (rel->r_info);
6146
6147 if (r_symndx < symtab_hdr->sh_info)
6148 {
6149 sym = local_syms + r_symndx;
6150 sec = local_sections[r_symndx];
6151 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6152
6153 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6154 }
6155 else
6156 {
6157 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6158 r_symndx, symtab_hdr, sym_hashes,
6159 h, sec, relocation,
6160 unresolved_reloc, warned);
6161
6162 sym_name = h->root.root.string;
6163 }
6164
6165 if (sec != NULL && elf_discarded_section (sec))
6166 {
6167 /* For relocs against symbols from removed linkonce sections,
6168 or sections discarded by a linker script, we just want the
6169 section contents zeroed. Avoid any special processing. */
6170 howto = NULL;
6171 if (r_type < R_PPC_max)
6172 howto = ppc_elf_howto_table[r_type];
6173 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6174 rel->r_info = 0;
6175 rel->r_addend = 0;
6176 continue;
6177 }
6178
6179 if (info->relocatable)
6180 {
6181 if (got2 != NULL
6182 && r_type == R_PPC_PLTREL24
6183 && rel->r_addend >= 32768)
6184 {
6185 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6186 addend specifies the GOT pointer offset within .got2. */
6187 rel->r_addend += got2->output_offset;
6188 }
6189 continue;
6190 }
6191
6192 /* TLS optimizations. Replace instruction sequences and relocs
6193 based on information we collected in tls_optimize. We edit
6194 RELOCS so that --emit-relocs will output something sensible
6195 for the final instruction stream. */
6196 tls_mask = 0;
6197 tls_gd = 0;
6198 if (IS_PPC_TLS_RELOC (r_type))
6199 {
6200 if (h != NULL)
6201 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6202 else if (local_got_offsets != NULL)
6203 {
6204 char *lgot_masks;
6205 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6206 tls_mask = lgot_masks[r_symndx];
6207 }
6208 }
6209
6210 /* Ensure reloc mapping code below stays sane. */
6211 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6212 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6213 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6214 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6215 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6216 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6217 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6218 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6219 abort ();
6220 switch (r_type)
6221 {
6222 default:
6223 break;
6224
6225 case R_PPC_GOT_TPREL16:
6226 case R_PPC_GOT_TPREL16_LO:
6227 if (tls_mask != 0
6228 && (tls_mask & TLS_TPREL) == 0)
6229 {
6230 bfd_vma insn;
6231 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6232 insn &= 31 << 21;
6233 insn |= 0x3c020000; /* addis 0,2,0 */
6234 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6235 r_type = R_PPC_TPREL16_HA;
6236 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6237 }
6238 break;
6239
6240 case R_PPC_TLS:
6241 if (tls_mask != 0
6242 && (tls_mask & TLS_TPREL) == 0)
6243 {
6244 bfd_vma insn, rtra;
6245 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6246 if ((insn & ((31 << 26) | (31 << 11)))
6247 == ((31 << 26) | (2 << 11)))
6248 rtra = insn & ((1 << 26) - (1 << 16));
6249 else if ((insn & ((31 << 26) | (31 << 16)))
6250 == ((31 << 26) | (2 << 16)))
6251 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6252 else
6253 abort ();
6254 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6255 /* add -> addi. */
6256 insn = 14 << 26;
6257 else if ((insn & (31 << 1)) == 23 << 1
6258 && ((insn & (31 << 6)) < 14 << 6
6259 || ((insn & (31 << 6)) >= 16 << 6
6260 && (insn & (31 << 6)) < 24 << 6)))
6261 /* load and store indexed -> dform. */
6262 insn = (32 | ((insn >> 6) & 31)) << 26;
6263 else if ((insn & (31 << 1)) == 21 << 1
6264 && (insn & (0x1a << 6)) == 0)
6265 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6266 insn = (((58 | ((insn >> 6) & 4)) << 26)
6267 | ((insn >> 6) & 1));
6268 else if ((insn & (31 << 1)) == 21 << 1
6269 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6270 /* lwax -> lwa. */
6271 insn = (58 << 26) | 2;
6272 else
6273 abort ();
6274 insn |= rtra;
6275 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6276 r_type = R_PPC_TPREL16_LO;
6277 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6278
6279 /* Was PPC_TLS which sits on insn boundary, now
6280 PPC_TPREL16_LO which is at low-order half-word. */
6281 rel->r_offset += d_offset;
6282 }
6283 break;
6284
6285 case R_PPC_GOT_TLSGD16_HI:
6286 case R_PPC_GOT_TLSGD16_HA:
6287 tls_gd = TLS_TPRELGD;
6288 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6289 goto tls_gdld_hi;
6290 break;
6291
6292 case R_PPC_GOT_TLSLD16_HI:
6293 case R_PPC_GOT_TLSLD16_HA:
6294 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6295 {
6296 tls_gdld_hi:
6297 if ((tls_mask & tls_gd) != 0)
6298 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6299 + R_PPC_GOT_TPREL16);
6300 else
6301 {
6302 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6303 rel->r_offset -= d_offset;
6304 r_type = R_PPC_NONE;
6305 }
6306 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6307 }
6308 break;
6309
6310 case R_PPC_GOT_TLSGD16:
6311 case R_PPC_GOT_TLSGD16_LO:
6312 tls_gd = TLS_TPRELGD;
6313 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6314 goto tls_ldgd_opt;
6315 break;
6316
6317 case R_PPC_GOT_TLSLD16:
6318 case R_PPC_GOT_TLSLD16_LO:
6319 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6320 {
6321 bfd_vma insn1, insn2;
6322 bfd_vma offset;
6323
6324 tls_ldgd_opt:
6325 offset = rel[1].r_offset;
6326 insn1 = bfd_get_32 (output_bfd,
6327 contents + rel->r_offset - d_offset);
6328 if ((tls_mask & tls_gd) != 0)
6329 {
6330 /* IE */
6331 insn1 &= (1 << 26) - 1;
6332 insn1 |= 32 << 26; /* lwz */
6333 insn2 = 0x7c631214; /* add 3,3,2 */
6334 rel[1].r_info
6335 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6336 rel[1].r_addend = 0;
6337 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6338 + R_PPC_GOT_TPREL16);
6339 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6340 }
6341 else
6342 {
6343 /* LE */
6344 insn1 = 0x3c620000; /* addis 3,2,0 */
6345 insn2 = 0x38630000; /* addi 3,3,0 */
6346 if (tls_gd == 0)
6347 {
6348 /* Was an LD reloc. */
6349 for (r_symndx = 0;
6350 r_symndx < symtab_hdr->sh_info;
6351 r_symndx++)
6352 if (local_sections[r_symndx] == sec)
6353 break;
6354 if (r_symndx >= symtab_hdr->sh_info)
6355 r_symndx = 0;
6356 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6357 if (r_symndx != 0)
6358 rel->r_addend -= (local_syms[r_symndx].st_value
6359 + sec->output_offset
6360 + sec->output_section->vma);
6361 }
6362 r_type = R_PPC_TPREL16_HA;
6363 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6364 rel[1].r_info = ELF32_R_INFO (r_symndx,
6365 R_PPC_TPREL16_LO);
6366 rel[1].r_offset += d_offset;
6367 rel[1].r_addend = rel->r_addend;
6368 }
6369 bfd_put_32 (output_bfd, insn1,
6370 contents + rel->r_offset - d_offset);
6371 bfd_put_32 (output_bfd, insn2, contents + offset);
6372 if (tls_gd == 0)
6373 {
6374 /* We changed the symbol on an LD reloc. Start over
6375 in order to get h, sym, sec etc. right. */
6376 rel--;
6377 continue;
6378 }
6379 }
6380 break;
6381 }
6382
6383 /* Handle other relocations that tweak non-addend part of insn. */
6384 branch_bit = 0;
6385 switch (r_type)
6386 {
6387 default:
6388 break;
6389
6390 /* Branch taken prediction relocations. */
6391 case R_PPC_ADDR14_BRTAKEN:
6392 case R_PPC_REL14_BRTAKEN:
6393 branch_bit = BRANCH_PREDICT_BIT;
6394 /* Fall thru */
6395
6396 /* Branch not taken prediction relocations. */
6397 case R_PPC_ADDR14_BRNTAKEN:
6398 case R_PPC_REL14_BRNTAKEN:
6399 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6400 insn &= ~BRANCH_PREDICT_BIT;
6401 insn |= branch_bit;
6402
6403 from = (rel->r_offset
6404 + input_section->output_offset
6405 + input_section->output_section->vma);
6406
6407 /* Invert 'y' bit if not the default. */
6408 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6409 insn ^= BRANCH_PREDICT_BIT;
6410
6411 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6412 break;
6413 }
6414
6415 addend = rel->r_addend;
6416 tls_type = 0;
6417 howto = NULL;
6418 if (r_type < R_PPC_max)
6419 howto = ppc_elf_howto_table[r_type];
6420 switch (r_type)
6421 {
6422 default:
6423 (*_bfd_error_handler)
6424 (_("%B: unknown relocation type %d for symbol %s"),
6425 input_bfd, (int) r_type, sym_name);
6426
6427 bfd_set_error (bfd_error_bad_value);
6428 ret = FALSE;
6429 continue;
6430
6431 case R_PPC_NONE:
6432 case R_PPC_TLS:
6433 case R_PPC_EMB_MRKREF:
6434 case R_PPC_GNU_VTINHERIT:
6435 case R_PPC_GNU_VTENTRY:
6436 continue;
6437
6438 /* GOT16 relocations. Like an ADDR16 using the symbol's
6439 address in the GOT as relocation value instead of the
6440 symbol's value itself. Also, create a GOT entry for the
6441 symbol and put the symbol value there. */
6442 case R_PPC_GOT_TLSGD16:
6443 case R_PPC_GOT_TLSGD16_LO:
6444 case R_PPC_GOT_TLSGD16_HI:
6445 case R_PPC_GOT_TLSGD16_HA:
6446 tls_type = TLS_TLS | TLS_GD;
6447 goto dogot;
6448
6449 case R_PPC_GOT_TLSLD16:
6450 case R_PPC_GOT_TLSLD16_LO:
6451 case R_PPC_GOT_TLSLD16_HI:
6452 case R_PPC_GOT_TLSLD16_HA:
6453 tls_type = TLS_TLS | TLS_LD;
6454 goto dogot;
6455
6456 case R_PPC_GOT_TPREL16:
6457 case R_PPC_GOT_TPREL16_LO:
6458 case R_PPC_GOT_TPREL16_HI:
6459 case R_PPC_GOT_TPREL16_HA:
6460 tls_type = TLS_TLS | TLS_TPREL;
6461 goto dogot;
6462
6463 case R_PPC_GOT_DTPREL16:
6464 case R_PPC_GOT_DTPREL16_LO:
6465 case R_PPC_GOT_DTPREL16_HI:
6466 case R_PPC_GOT_DTPREL16_HA:
6467 tls_type = TLS_TLS | TLS_DTPREL;
6468 goto dogot;
6469
6470 case R_PPC_GOT16:
6471 case R_PPC_GOT16_LO:
6472 case R_PPC_GOT16_HI:
6473 case R_PPC_GOT16_HA:
6474 dogot:
6475 {
6476 /* Relocation is to the entry for this symbol in the global
6477 offset table. */
6478 bfd_vma off;
6479 bfd_vma *offp;
6480 unsigned long indx;
6481
6482 if (htab->got == NULL)
6483 abort ();
6484
6485 indx = 0;
6486 if (tls_type == (TLS_TLS | TLS_LD)
6487 && (h == NULL
6488 || !h->def_dynamic))
6489 offp = &htab->tlsld_got.offset;
6490 else if (h != NULL)
6491 {
6492 bfd_boolean dyn;
6493 dyn = htab->elf.dynamic_sections_created;
6494 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6495 || (info->shared
6496 && SYMBOL_REFERENCES_LOCAL (info, h)))
6497 /* This is actually a static link, or it is a
6498 -Bsymbolic link and the symbol is defined
6499 locally, or the symbol was forced to be local
6500 because of a version file. */
6501 ;
6502 else
6503 {
6504 indx = h->dynindx;
6505 unresolved_reloc = FALSE;
6506 }
6507 offp = &h->got.offset;
6508 }
6509 else
6510 {
6511 if (local_got_offsets == NULL)
6512 abort ();
6513 offp = &local_got_offsets[r_symndx];
6514 }
6515
6516 /* The offset must always be a multiple of 4. We use the
6517 least significant bit to record whether we have already
6518 processed this entry. */
6519 off = *offp;
6520 if ((off & 1) != 0)
6521 off &= ~1;
6522 else
6523 {
6524 unsigned int tls_m = (tls_mask
6525 & (TLS_LD | TLS_GD | TLS_DTPREL
6526 | TLS_TPREL | TLS_TPRELGD));
6527
6528 if (offp == &htab->tlsld_got.offset)
6529 tls_m = TLS_LD;
6530 else if (h == NULL
6531 || !h->def_dynamic)
6532 tls_m &= ~TLS_LD;
6533
6534 /* We might have multiple got entries for this sym.
6535 Initialize them all. */
6536 do
6537 {
6538 int tls_ty = 0;
6539
6540 if ((tls_m & TLS_LD) != 0)
6541 {
6542 tls_ty = TLS_TLS | TLS_LD;
6543 tls_m &= ~TLS_LD;
6544 }
6545 else if ((tls_m & TLS_GD) != 0)
6546 {
6547 tls_ty = TLS_TLS | TLS_GD;
6548 tls_m &= ~TLS_GD;
6549 }
6550 else if ((tls_m & TLS_DTPREL) != 0)
6551 {
6552 tls_ty = TLS_TLS | TLS_DTPREL;
6553 tls_m &= ~TLS_DTPREL;
6554 }
6555 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6556 {
6557 tls_ty = TLS_TLS | TLS_TPREL;
6558 tls_m = 0;
6559 }
6560
6561 /* Generate relocs for the dynamic linker. */
6562 if ((info->shared || indx != 0)
6563 && (h == NULL
6564 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6565 || h->root.type != bfd_link_hash_undefweak))
6566 {
6567 outrel.r_offset = (htab->got->output_section->vma
6568 + htab->got->output_offset
6569 + off);
6570 outrel.r_addend = 0;
6571 if (tls_ty & (TLS_LD | TLS_GD))
6572 {
6573 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6574 if (tls_ty == (TLS_TLS | TLS_GD))
6575 {
6576 loc = htab->relgot->contents;
6577 loc += (htab->relgot->reloc_count++
6578 * sizeof (Elf32_External_Rela));
6579 bfd_elf32_swap_reloca_out (output_bfd,
6580 &outrel, loc);
6581 outrel.r_offset += 4;
6582 outrel.r_info
6583 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6584 }
6585 }
6586 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6587 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6588 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6589 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6590 else if (indx == 0)
6591 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6592 else
6593 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6594 if (indx == 0)
6595 {
6596 outrel.r_addend += relocation;
6597 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6598 outrel.r_addend -= htab->elf.tls_sec->vma;
6599 }
6600 loc = htab->relgot->contents;
6601 loc += (htab->relgot->reloc_count++
6602 * sizeof (Elf32_External_Rela));
6603 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6604 }
6605
6606 /* Init the .got section contents if we're not
6607 emitting a reloc. */
6608 else
6609 {
6610 bfd_vma value = relocation;
6611
6612 if (tls_ty == (TLS_TLS | TLS_LD))
6613 value = 1;
6614 else if (tls_ty != 0)
6615 {
6616 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6617 if (tls_ty == (TLS_TLS | TLS_TPREL))
6618 value += DTP_OFFSET - TP_OFFSET;
6619
6620 if (tls_ty == (TLS_TLS | TLS_GD))
6621 {
6622 bfd_put_32 (output_bfd, value,
6623 htab->got->contents + off + 4);
6624 value = 1;
6625 }
6626 }
6627 bfd_put_32 (output_bfd, value,
6628 htab->got->contents + off);
6629 }
6630
6631 off += 4;
6632 if (tls_ty & (TLS_LD | TLS_GD))
6633 off += 4;
6634 }
6635 while (tls_m != 0);
6636
6637 off = *offp;
6638 *offp = off | 1;
6639 }
6640
6641 if (off >= (bfd_vma) -2)
6642 abort ();
6643
6644 if ((tls_type & TLS_TLS) != 0)
6645 {
6646 if (tls_type != (TLS_TLS | TLS_LD))
6647 {
6648 if ((tls_mask & TLS_LD) != 0
6649 && !(h == NULL
6650 || !h->def_dynamic))
6651 off += 8;
6652 if (tls_type != (TLS_TLS | TLS_GD))
6653 {
6654 if ((tls_mask & TLS_GD) != 0)
6655 off += 8;
6656 if (tls_type != (TLS_TLS | TLS_DTPREL))
6657 {
6658 if ((tls_mask & TLS_DTPREL) != 0)
6659 off += 4;
6660 }
6661 }
6662 }
6663 }
6664
6665 relocation = (htab->got->output_section->vma
6666 + htab->got->output_offset
6667 + off
6668 - SYM_VAL (htab->elf.hgot));
6669
6670 /* Addends on got relocations don't make much sense.
6671 x+off@got is actually x@got+off, and since the got is
6672 generated by a hash table traversal, the value in the
6673 got at entry m+n bears little relation to the entry m. */
6674 if (addend != 0)
6675 (*_bfd_error_handler)
6676 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6677 input_bfd,
6678 input_section,
6679 (long) rel->r_offset,
6680 howto->name,
6681 sym_name);
6682 }
6683 break;
6684
6685 /* Relocations that need no special processing. */
6686 case R_PPC_LOCAL24PC:
6687 /* It makes no sense to point a local relocation
6688 at a symbol not in this object. */
6689 if (unresolved_reloc)
6690 {
6691 if (! (*info->callbacks->undefined_symbol) (info,
6692 h->root.root.string,
6693 input_bfd,
6694 input_section,
6695 rel->r_offset,
6696 TRUE))
6697 return FALSE;
6698 continue;
6699 }
6700 break;
6701
6702 case R_PPC_DTPREL16:
6703 case R_PPC_DTPREL16_LO:
6704 case R_PPC_DTPREL16_HI:
6705 case R_PPC_DTPREL16_HA:
6706 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6707 break;
6708
6709 /* Relocations that may need to be propagated if this is a shared
6710 object. */
6711 case R_PPC_TPREL16:
6712 case R_PPC_TPREL16_LO:
6713 case R_PPC_TPREL16_HI:
6714 case R_PPC_TPREL16_HA:
6715 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6716 /* The TPREL16 relocs shouldn't really be used in shared
6717 libs as they will result in DT_TEXTREL being set, but
6718 support them anyway. */
6719 goto dodyn;
6720
6721 case R_PPC_TPREL32:
6722 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6723 goto dodyn;
6724
6725 case R_PPC_DTPREL32:
6726 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6727 goto dodyn;
6728
6729 case R_PPC_DTPMOD32:
6730 relocation = 1;
6731 addend = 0;
6732 goto dodyn;
6733
6734 case R_PPC_REL16:
6735 case R_PPC_REL16_LO:
6736 case R_PPC_REL16_HI:
6737 case R_PPC_REL16_HA:
6738 break;
6739
6740 case R_PPC_REL32:
6741 if (h == NULL || h == htab->elf.hgot)
6742 break;
6743 /* fall through */
6744
6745 case R_PPC_ADDR32:
6746 case R_PPC_ADDR16:
6747 case R_PPC_ADDR16_LO:
6748 case R_PPC_ADDR16_HI:
6749 case R_PPC_ADDR16_HA:
6750 case R_PPC_UADDR32:
6751 case R_PPC_UADDR16:
6752 goto dodyn;
6753
6754 case R_PPC_REL24:
6755 case R_PPC_REL14:
6756 case R_PPC_REL14_BRTAKEN:
6757 case R_PPC_REL14_BRNTAKEN:
6758 /* If these relocations are not to a named symbol, they can be
6759 handled right here, no need to bother the dynamic linker. */
6760 if (SYMBOL_CALLS_LOCAL (info, h)
6761 || h == htab->elf.hgot)
6762 break;
6763 /* fall through */
6764
6765 case R_PPC_ADDR24:
6766 case R_PPC_ADDR14:
6767 case R_PPC_ADDR14_BRTAKEN:
6768 case R_PPC_ADDR14_BRNTAKEN:
6769 if (h != NULL && !info->shared)
6770 break;
6771 /* fall through */
6772
6773 dodyn:
6774 if ((input_section->flags & SEC_ALLOC) == 0
6775 || is_vxworks_tls)
6776 break;
6777
6778 if ((info->shared
6779 && !(h != NULL
6780 && ((h->root.type == bfd_link_hash_undefined
6781 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6782 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6783 || (h->root.type == bfd_link_hash_undefweak
6784 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6785 && (must_be_dyn_reloc (info, r_type)
6786 || !SYMBOL_CALLS_LOCAL (info, h)))
6787 || (ELIMINATE_COPY_RELOCS
6788 && !info->shared
6789 && h != NULL
6790 && h->dynindx != -1
6791 && !h->non_got_ref
6792 && !h->def_regular))
6793 {
6794 int skip;
6795
6796 #ifdef DEBUG
6797 fprintf (stderr, "ppc_elf_relocate_section needs to "
6798 "create relocation for %s\n",
6799 (h && h->root.root.string
6800 ? h->root.root.string : "<unknown>"));
6801 #endif
6802
6803 /* When generating a shared object, these relocations
6804 are copied into the output file to be resolved at run
6805 time. */
6806 if (sreloc == NULL)
6807 {
6808 const char *name;
6809
6810 name = (bfd_elf_string_from_elf_section
6811 (input_bfd,
6812 elf_elfheader (input_bfd)->e_shstrndx,
6813 elf_section_data (input_section)->rel_hdr.sh_name));
6814 if (name == NULL)
6815 return FALSE;
6816
6817 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6818 && strcmp (bfd_get_section_name (input_bfd,
6819 input_section),
6820 name + 5) == 0);
6821
6822 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6823 BFD_ASSERT (sreloc != NULL);
6824 }
6825
6826 skip = 0;
6827 outrel.r_offset =
6828 _bfd_elf_section_offset (output_bfd, info, input_section,
6829 rel->r_offset);
6830 if (outrel.r_offset == (bfd_vma) -1
6831 || outrel.r_offset == (bfd_vma) -2)
6832 skip = (int) outrel.r_offset;
6833 outrel.r_offset += (input_section->output_section->vma
6834 + input_section->output_offset);
6835
6836 if (skip)
6837 memset (&outrel, 0, sizeof outrel);
6838 else if ((h != NULL
6839 && (h->root.type == bfd_link_hash_undefined
6840 || h->root.type == bfd_link_hash_undefweak))
6841 || !SYMBOL_REFERENCES_LOCAL (info, h))
6842 {
6843 unresolved_reloc = FALSE;
6844 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6845 outrel.r_addend = rel->r_addend;
6846 }
6847 else
6848 {
6849 outrel.r_addend = relocation + rel->r_addend;
6850
6851 if (r_type == R_PPC_ADDR32)
6852 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6853 else
6854 {
6855 long indx = 0;
6856
6857 if (r_symndx == 0 || bfd_is_abs_section (sec))
6858 ;
6859 else if (sec == NULL || sec->owner == NULL)
6860 {
6861 bfd_set_error (bfd_error_bad_value);
6862 ret = FALSE;
6863 }
6864 else
6865 {
6866 asection *osec;
6867
6868 /* We are turning this relocation into one
6869 against a section symbol. It would be
6870 proper to subtract the symbol's value,
6871 osec->vma, from the emitted reloc addend,
6872 but ld.so expects buggy relocs. */
6873 osec = sec->output_section;
6874 indx = elf_section_data (osec)->dynindx;
6875 if (indx == 0)
6876 {
6877 osec = htab->elf.text_index_section;
6878 indx = elf_section_data (osec)->dynindx;
6879 }
6880 BFD_ASSERT (indx != 0);
6881 #ifdef DEBUG
6882 if (indx == 0)
6883 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6884 indx, osec->name, osec->flags,
6885 h->root.root.string);
6886 #endif
6887 }
6888
6889 outrel.r_info = ELF32_R_INFO (indx, r_type);
6890 }
6891 }
6892
6893 loc = sreloc->contents;
6894 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6895 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6896
6897 if (skip == -1)
6898 continue;
6899
6900 /* This reloc will be computed at runtime. We clear the memory
6901 so that it contains predictable value. */
6902 if (! skip
6903 && ((input_section->flags & SEC_ALLOC) != 0
6904 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6905 {
6906 relocation = howto->pc_relative ? outrel.r_offset : 0;
6907 addend = 0;
6908 break;
6909 }
6910 }
6911 break;
6912
6913 case R_PPC_RELAX32PC_PLT:
6914 case R_PPC_RELAX32_PLT:
6915 {
6916 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6917
6918 if (htab->plt_type == PLT_NEW)
6919 relocation = (htab->glink->output_section->vma
6920 + htab->glink->output_offset
6921 + ent->glink_offset);
6922 else
6923 relocation = (htab->plt->output_section->vma
6924 + htab->plt->output_offset
6925 + ent->plt.offset);
6926 }
6927 if (r_type == R_PPC_RELAX32_PLT)
6928 goto relax32;
6929 /* Fall thru */
6930
6931 case R_PPC_RELAX32PC:
6932 relocation -= (input_section->output_section->vma
6933 + input_section->output_offset
6934 + rel->r_offset - 4);
6935 /* Fall thru */
6936
6937 case R_PPC_RELAX32:
6938 relax32:
6939 {
6940 unsigned long t0;
6941 unsigned long t1;
6942
6943 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6944 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6945
6946 /* We're clearing the bits for R_PPC_ADDR16_HA
6947 and R_PPC_ADDR16_LO here. */
6948 t0 &= ~0xffff;
6949 t1 &= ~0xffff;
6950
6951 /* t0 is HA, t1 is LO */
6952 relocation += addend;
6953 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6954 t1 |= relocation & 0xffff;
6955
6956 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6957 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6958 }
6959 continue;
6960
6961 /* Indirect .sdata relocation. */
6962 case R_PPC_EMB_SDAI16:
6963 BFD_ASSERT (htab->sdata[0].section != NULL);
6964 relocation
6965 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6966 h, relocation, rel);
6967 break;
6968
6969 /* Indirect .sdata2 relocation. */
6970 case R_PPC_EMB_SDA2I16:
6971 BFD_ASSERT (htab->sdata[1].section != NULL);
6972 relocation
6973 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6974 h, relocation, rel);
6975 break;
6976
6977 /* Handle the TOC16 reloc. We want to use the offset within the .got
6978 section, not the actual VMA. This is appropriate when generating
6979 an embedded ELF object, for which the .got section acts like the
6980 AIX .toc section. */
6981 case R_PPC_TOC16: /* phony GOT16 relocations */
6982 if (sec == NULL || sec->output_section == NULL)
6983 {
6984 unresolved_reloc = TRUE;
6985 break;
6986 }
6987 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6988 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6989
6990 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6991 break;
6992
6993 case R_PPC_PLTREL24:
6994 /* Relocation is to the entry for this symbol in the
6995 procedure linkage table. */
6996 {
6997 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6998
6999 addend = 0;
7000 if (ent == NULL
7001 || htab->plt == NULL)
7002 {
7003 /* We didn't make a PLT entry for this symbol. This
7004 happens when statically linking PIC code, or when
7005 using -Bsymbolic. */
7006 break;
7007 }
7008
7009 unresolved_reloc = FALSE;
7010 if (htab->plt_type == PLT_NEW)
7011 relocation = (htab->glink->output_section->vma
7012 + htab->glink->output_offset
7013 + ent->glink_offset);
7014 else
7015 relocation = (htab->plt->output_section->vma
7016 + htab->plt->output_offset
7017 + ent->plt.offset);
7018 }
7019 break;
7020
7021 /* Relocate against _SDA_BASE_. */
7022 case R_PPC_SDAREL16:
7023 {
7024 const char *name;
7025
7026 if (sec == NULL || sec->output_section == NULL)
7027 {
7028 unresolved_reloc = TRUE;
7029 break;
7030 }
7031
7032 name = bfd_get_section_name (abfd, sec->output_section);
7033 if (! ((CONST_STRNEQ (name, ".sdata")
7034 && (name[6] == 0 || name[6] == '.'))
7035 || (CONST_STRNEQ (name, ".sbss")
7036 && (name[5] == 0 || name[5] == '.'))))
7037 {
7038 (*_bfd_error_handler)
7039 (_("%B: the target (%s) of a %s relocation is "
7040 "in the wrong output section (%s)"),
7041 input_bfd,
7042 sym_name,
7043 howto->name,
7044 name);
7045 }
7046 addend -= SYM_VAL (htab->sdata[0].sym);
7047 }
7048 break;
7049
7050 /* Relocate against _SDA2_BASE_. */
7051 case R_PPC_EMB_SDA2REL:
7052 {
7053 const char *name;
7054
7055 if (sec == NULL || sec->output_section == NULL)
7056 {
7057 unresolved_reloc = TRUE;
7058 break;
7059 }
7060
7061 name = bfd_get_section_name (abfd, sec->output_section);
7062 if (! (CONST_STRNEQ (name, ".sdata2")
7063 || CONST_STRNEQ (name, ".sbss2")))
7064 {
7065 (*_bfd_error_handler)
7066 (_("%B: the target (%s) of a %s relocation is "
7067 "in the wrong output section (%s)"),
7068 input_bfd,
7069 sym_name,
7070 howto->name,
7071 name);
7072
7073 bfd_set_error (bfd_error_bad_value);
7074 ret = FALSE;
7075 continue;
7076 }
7077 addend -= SYM_VAL (htab->sdata[1].sym);
7078 }
7079 break;
7080
7081 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7082 case R_PPC_EMB_SDA21:
7083 case R_PPC_EMB_RELSDA:
7084 {
7085 const char *name;
7086 int reg;
7087
7088 if (sec == NULL || sec->output_section == NULL)
7089 {
7090 unresolved_reloc = TRUE;
7091 break;
7092 }
7093
7094 name = bfd_get_section_name (abfd, sec->output_section);
7095 if (((CONST_STRNEQ (name, ".sdata")
7096 && (name[6] == 0 || name[6] == '.'))
7097 || (CONST_STRNEQ (name, ".sbss")
7098 && (name[5] == 0 || name[5] == '.'))))
7099 {
7100 reg = 13;
7101 addend -= SYM_VAL (htab->sdata[0].sym);
7102 }
7103 else if (CONST_STRNEQ (name, ".sdata2")
7104 || CONST_STRNEQ (name, ".sbss2"))
7105 {
7106 reg = 2;
7107 addend -= SYM_VAL (htab->sdata[1].sym);
7108 }
7109 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7110 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7111 {
7112 reg = 0;
7113 }
7114 else
7115 {
7116 (*_bfd_error_handler)
7117 (_("%B: the target (%s) of a %s relocation is "
7118 "in the wrong output section (%s)"),
7119 input_bfd,
7120 sym_name,
7121 howto->name,
7122 name);
7123
7124 bfd_set_error (bfd_error_bad_value);
7125 ret = FALSE;
7126 continue;
7127 }
7128
7129 if (r_type == R_PPC_EMB_SDA21)
7130 { /* fill in register field */
7131 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7132 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7133 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7134 }
7135 }
7136 break;
7137
7138 /* Relocate against the beginning of the section. */
7139 case R_PPC_SECTOFF:
7140 case R_PPC_SECTOFF_LO:
7141 case R_PPC_SECTOFF_HI:
7142 case R_PPC_SECTOFF_HA:
7143 if (sec == NULL || sec->output_section == NULL)
7144 {
7145 unresolved_reloc = TRUE;
7146 break;
7147 }
7148 addend -= sec->output_section->vma;
7149 break;
7150
7151 /* Negative relocations. */
7152 case R_PPC_EMB_NADDR32:
7153 case R_PPC_EMB_NADDR16:
7154 case R_PPC_EMB_NADDR16_LO:
7155 case R_PPC_EMB_NADDR16_HI:
7156 case R_PPC_EMB_NADDR16_HA:
7157 addend -= 2 * relocation;
7158 break;
7159
7160 case R_PPC_COPY:
7161 case R_PPC_GLOB_DAT:
7162 case R_PPC_JMP_SLOT:
7163 case R_PPC_RELATIVE:
7164 case R_PPC_PLT32:
7165 case R_PPC_PLTREL32:
7166 case R_PPC_PLT16_LO:
7167 case R_PPC_PLT16_HI:
7168 case R_PPC_PLT16_HA:
7169 case R_PPC_ADDR30:
7170 case R_PPC_EMB_RELSEC16:
7171 case R_PPC_EMB_RELST_LO:
7172 case R_PPC_EMB_RELST_HI:
7173 case R_PPC_EMB_RELST_HA:
7174 case R_PPC_EMB_BIT_FLD:
7175 (*_bfd_error_handler)
7176 (_("%B: relocation %s is not yet supported for symbol %s."),
7177 input_bfd,
7178 howto->name,
7179 sym_name);
7180
7181 bfd_set_error (bfd_error_invalid_operation);
7182 ret = FALSE;
7183 continue;
7184 }
7185
7186 /* Do any further special processing. */
7187 switch (r_type)
7188 {
7189 default:
7190 break;
7191
7192 case R_PPC_ADDR16_HA:
7193 case R_PPC_REL16_HA:
7194 case R_PPC_SECTOFF_HA:
7195 case R_PPC_TPREL16_HA:
7196 case R_PPC_DTPREL16_HA:
7197 case R_PPC_EMB_NADDR16_HA:
7198 case R_PPC_EMB_RELST_HA:
7199 /* It's just possible that this symbol is a weak symbol
7200 that's not actually defined anywhere. In that case,
7201 'sec' would be NULL, and we should leave the symbol
7202 alone (it will be set to zero elsewhere in the link). */
7203 if (sec == NULL)
7204 break;
7205 /* Fall thru */
7206
7207 case R_PPC_PLT16_HA:
7208 case R_PPC_GOT16_HA:
7209 case R_PPC_GOT_TLSGD16_HA:
7210 case R_PPC_GOT_TLSLD16_HA:
7211 case R_PPC_GOT_TPREL16_HA:
7212 case R_PPC_GOT_DTPREL16_HA:
7213 /* Add 0x10000 if sign bit in 0:15 is set.
7214 Bits 0:15 are not used. */
7215 addend += 0x8000;
7216 break;
7217 }
7218
7219 #ifdef DEBUG
7220 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7221 "offset = %ld, addend = %ld\n",
7222 howto->name,
7223 (int) r_type,
7224 sym_name,
7225 r_symndx,
7226 (long) rel->r_offset,
7227 (long) addend);
7228 #endif
7229
7230 if (unresolved_reloc
7231 && !((input_section->flags & SEC_DEBUGGING) != 0
7232 && h->def_dynamic))
7233 {
7234 (*_bfd_error_handler)
7235 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7236 input_bfd,
7237 input_section,
7238 (long) rel->r_offset,
7239 howto->name,
7240 sym_name);
7241 ret = FALSE;
7242 }
7243
7244 r = _bfd_final_link_relocate (howto,
7245 input_bfd,
7246 input_section,
7247 contents,
7248 rel->r_offset,
7249 relocation,
7250 addend);
7251
7252 if (r != bfd_reloc_ok)
7253 {
7254 if (r == bfd_reloc_overflow)
7255 {
7256 if (warned)
7257 continue;
7258 if (h != NULL
7259 && h->root.type == bfd_link_hash_undefweak
7260 && howto->pc_relative)
7261 {
7262 /* Assume this is a call protected by other code that
7263 detect the symbol is undefined. If this is the case,
7264 we can safely ignore the overflow. If not, the
7265 program is hosed anyway, and a little warning isn't
7266 going to help. */
7267
7268 continue;
7269 }
7270
7271 if (! (*info->callbacks->reloc_overflow) (info,
7272 (h ? &h->root : NULL),
7273 sym_name,
7274 howto->name,
7275 rel->r_addend,
7276 input_bfd,
7277 input_section,
7278 rel->r_offset))
7279 return FALSE;
7280 }
7281 else
7282 {
7283 (*_bfd_error_handler)
7284 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7285 input_bfd, input_section,
7286 (long) rel->r_offset, howto->name, sym_name, (int) r);
7287 ret = FALSE;
7288 }
7289 }
7290 }
7291
7292 #ifdef DEBUG
7293 fprintf (stderr, "\n");
7294 #endif
7295
7296 return ret;
7297 }
7298 \f
7299 #define PPC_LO(v) ((v) & 0xffff)
7300 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7301 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7302
7303 /* Finish up dynamic symbol handling. We set the contents of various
7304 dynamic sections here. */
7305
7306 static bfd_boolean
7307 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7308 struct bfd_link_info *info,
7309 struct elf_link_hash_entry *h,
7310 Elf_Internal_Sym *sym)
7311 {
7312 struct ppc_elf_link_hash_table *htab;
7313 struct plt_entry *ent;
7314 bfd_boolean doneone;
7315
7316 #ifdef DEBUG
7317 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7318 h->root.root.string);
7319 #endif
7320
7321 htab = ppc_elf_hash_table (info);
7322 BFD_ASSERT (htab->elf.dynobj != NULL);
7323
7324 doneone = FALSE;
7325 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7326 if (ent->plt.offset != (bfd_vma) -1)
7327 {
7328 if (!doneone)
7329 {
7330 Elf_Internal_Rela rela;
7331 bfd_byte *loc;
7332 bfd_vma reloc_index;
7333
7334 if (htab->plt_type == PLT_NEW)
7335 reloc_index = ent->plt.offset / 4;
7336 else
7337 {
7338 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7339 / htab->plt_slot_size);
7340 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7341 && htab->plt_type == PLT_OLD)
7342 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7343 }
7344
7345 /* This symbol has an entry in the procedure linkage table.
7346 Set it up. */
7347 if (htab->plt_type == PLT_VXWORKS)
7348 {
7349 bfd_vma got_offset;
7350 const bfd_vma *plt_entry;
7351
7352 /* The first three entries in .got.plt are reserved. */
7353 got_offset = (reloc_index + 3) * 4;
7354
7355 /* Use the right PLT. */
7356 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7357 : ppc_elf_vxworks_plt_entry;
7358
7359 /* Fill in the .plt on VxWorks. */
7360 if (info->shared)
7361 {
7362 bfd_put_32 (output_bfd,
7363 plt_entry[0] | PPC_HA (got_offset),
7364 htab->plt->contents + ent->plt.offset + 0);
7365 bfd_put_32 (output_bfd,
7366 plt_entry[1] | PPC_LO (got_offset),
7367 htab->plt->contents + ent->plt.offset + 4);
7368 }
7369 else
7370 {
7371 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7372
7373 bfd_put_32 (output_bfd,
7374 plt_entry[0] | PPC_HA (got_loc),
7375 htab->plt->contents + ent->plt.offset + 0);
7376 bfd_put_32 (output_bfd,
7377 plt_entry[1] | PPC_LO (got_loc),
7378 htab->plt->contents + ent->plt.offset + 4);
7379 }
7380
7381 bfd_put_32 (output_bfd, plt_entry[2],
7382 htab->plt->contents + ent->plt.offset + 8);
7383 bfd_put_32 (output_bfd, plt_entry[3],
7384 htab->plt->contents + ent->plt.offset + 12);
7385
7386 /* This instruction is an immediate load. The value loaded is
7387 the byte offset of the R_PPC_JMP_SLOT relocation from the
7388 start of the .rela.plt section. The value is stored in the
7389 low-order 16 bits of the load instruction. */
7390 /* NOTE: It appears that this is now an index rather than a
7391 prescaled offset. */
7392 bfd_put_32 (output_bfd,
7393 plt_entry[4] | reloc_index,
7394 htab->plt->contents + ent->plt.offset + 16);
7395 /* This instruction is a PC-relative branch whose target is
7396 the start of the PLT section. The address of this branch
7397 instruction is 20 bytes beyond the start of this PLT entry.
7398 The address is encoded in bits 6-29, inclusive. The value
7399 stored is right-shifted by two bits, permitting a 26-bit
7400 offset. */
7401 bfd_put_32 (output_bfd,
7402 (plt_entry[5]
7403 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7404 htab->plt->contents + ent->plt.offset + 20);
7405 bfd_put_32 (output_bfd, plt_entry[6],
7406 htab->plt->contents + ent->plt.offset + 24);
7407 bfd_put_32 (output_bfd, plt_entry[7],
7408 htab->plt->contents + ent->plt.offset + 28);
7409
7410 /* Fill in the GOT entry corresponding to this PLT slot with
7411 the address immediately after the the "bctr" instruction
7412 in this PLT entry. */
7413 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7414 + htab->plt->output_offset
7415 + ent->plt.offset + 16),
7416 htab->sgotplt->contents + got_offset);
7417
7418 if (!info->shared)
7419 {
7420 /* Fill in a couple of entries in .rela.plt.unloaded. */
7421 loc = htab->srelplt2->contents
7422 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7423 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7424 * sizeof (Elf32_External_Rela));
7425
7426 /* Provide the @ha relocation for the first instruction. */
7427 rela.r_offset = (htab->plt->output_section->vma
7428 + htab->plt->output_offset
7429 + ent->plt.offset + 2);
7430 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7431 R_PPC_ADDR16_HA);
7432 rela.r_addend = got_offset;
7433 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7434 loc += sizeof (Elf32_External_Rela);
7435
7436 /* Provide the @l relocation for the second instruction. */
7437 rela.r_offset = (htab->plt->output_section->vma
7438 + htab->plt->output_offset
7439 + ent->plt.offset + 6);
7440 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7441 R_PPC_ADDR16_LO);
7442 rela.r_addend = got_offset;
7443 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7444 loc += sizeof (Elf32_External_Rela);
7445
7446 /* Provide a relocation for the GOT entry corresponding to this
7447 PLT slot. Point it at the middle of the .plt entry. */
7448 rela.r_offset = (htab->sgotplt->output_section->vma
7449 + htab->sgotplt->output_offset
7450 + got_offset);
7451 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7452 R_PPC_ADDR32);
7453 rela.r_addend = ent->plt.offset + 16;
7454 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7455 }
7456
7457 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7458 In particular, the offset for the relocation is not the
7459 address of the PLT entry for this function, as specified
7460 by the ABI. Instead, the offset is set to the address of
7461 the GOT slot for this function. See EABI 4.4.4.1. */
7462 rela.r_offset = (htab->sgotplt->output_section->vma
7463 + htab->sgotplt->output_offset
7464 + got_offset);
7465
7466 }
7467 else
7468 {
7469 rela.r_offset = (htab->plt->output_section->vma
7470 + htab->plt->output_offset
7471 + ent->plt.offset);
7472 if (htab->plt_type == PLT_OLD)
7473 {
7474 /* We don't need to fill in the .plt. The ppc dynamic
7475 linker will fill it in. */
7476 }
7477 else
7478 {
7479 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7480 + htab->glink->output_section->vma
7481 + htab->glink->output_offset);
7482 bfd_put_32 (output_bfd, val,
7483 htab->plt->contents + ent->plt.offset);
7484 }
7485 }
7486
7487 /* Fill in the entry in the .rela.plt section. */
7488 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7489 rela.r_addend = 0;
7490
7491 loc = (htab->relplt->contents
7492 + reloc_index * sizeof (Elf32_External_Rela));
7493 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7494
7495 if (!h->def_regular)
7496 {
7497 /* Mark the symbol as undefined, rather than as
7498 defined in the .plt section. Leave the value if
7499 there were any relocations where pointer equality
7500 matters (this is a clue for the dynamic linker, to
7501 make function pointer comparisons work between an
7502 application and shared library), otherwise set it
7503 to zero. */
7504 sym->st_shndx = SHN_UNDEF;
7505 if (!h->pointer_equality_needed)
7506 sym->st_value = 0;
7507 else if (!h->ref_regular_nonweak)
7508 {
7509 /* This breaks function pointer comparisons, but
7510 that is better than breaking tests for a NULL
7511 function pointer. */
7512 sym->st_value = 0;
7513 }
7514 }
7515 doneone = TRUE;
7516 }
7517
7518 if (htab->plt_type == PLT_NEW)
7519 {
7520 bfd_vma plt;
7521 unsigned char *p;
7522
7523 plt = (ent->plt.offset
7524 + htab->plt->output_section->vma
7525 + htab->plt->output_offset);
7526 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7527
7528 if (info->shared || info->pie)
7529 {
7530 bfd_vma got = 0;
7531
7532 if (ent->addend >= 32768)
7533 got = (ent->addend
7534 + ent->sec->output_section->vma
7535 + ent->sec->output_offset);
7536 else if (htab->elf.hgot != NULL)
7537 got = SYM_VAL (htab->elf.hgot);
7538
7539 plt -= got;
7540
7541 if (plt + 0x8000 < 0x10000)
7542 {
7543 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7544 p += 4;
7545 bfd_put_32 (output_bfd, MTCTR_11, p);
7546 p += 4;
7547 bfd_put_32 (output_bfd, BCTR, p);
7548 p += 4;
7549 bfd_put_32 (output_bfd, NOP, p);
7550 p += 4;
7551 }
7552 else
7553 {
7554 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7555 p += 4;
7556 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7557 p += 4;
7558 bfd_put_32 (output_bfd, MTCTR_11, p);
7559 p += 4;
7560 bfd_put_32 (output_bfd, BCTR, p);
7561 p += 4;
7562 }
7563 }
7564 else
7565 {
7566 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7567 p += 4;
7568 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7569 p += 4;
7570 bfd_put_32 (output_bfd, MTCTR_11, p);
7571 p += 4;
7572 bfd_put_32 (output_bfd, BCTR, p);
7573 p += 4;
7574
7575 /* We only need one non-PIC glink stub. */
7576 break;
7577 }
7578 }
7579 else
7580 break;
7581 }
7582
7583 if (h->needs_copy)
7584 {
7585 asection *s;
7586 Elf_Internal_Rela rela;
7587 bfd_byte *loc;
7588
7589 /* This symbols needs a copy reloc. Set it up. */
7590
7591 #ifdef DEBUG
7592 fprintf (stderr, ", copy");
7593 #endif
7594
7595 BFD_ASSERT (h->dynindx != -1);
7596
7597 if (ppc_elf_hash_entry (h)->has_sda_refs)
7598 s = htab->relsbss;
7599 else
7600 s = htab->relbss;
7601 BFD_ASSERT (s != NULL);
7602
7603 rela.r_offset = SYM_VAL (h);
7604 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7605 rela.r_addend = 0;
7606 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7607 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7608 }
7609
7610 #ifdef DEBUG
7611 fprintf (stderr, "\n");
7612 #endif
7613
7614 /* Mark some specially defined symbols as absolute. */
7615 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7616 || (!htab->is_vxworks
7617 && (h == htab->elf.hgot
7618 || strcmp (h->root.root.string,
7619 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7620 sym->st_shndx = SHN_ABS;
7621
7622 return TRUE;
7623 }
7624 \f
7625 static enum elf_reloc_type_class
7626 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7627 {
7628 switch (ELF32_R_TYPE (rela->r_info))
7629 {
7630 case R_PPC_RELATIVE:
7631 return reloc_class_relative;
7632 case R_PPC_REL24:
7633 case R_PPC_ADDR24:
7634 case R_PPC_JMP_SLOT:
7635 return reloc_class_plt;
7636 case R_PPC_COPY:
7637 return reloc_class_copy;
7638 default:
7639 return reloc_class_normal;
7640 }
7641 }
7642 \f
7643 /* Finish up the dynamic sections. */
7644
7645 static bfd_boolean
7646 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7647 struct bfd_link_info *info)
7648 {
7649 asection *sdyn;
7650 asection *splt;
7651 struct ppc_elf_link_hash_table *htab;
7652 bfd_vma got;
7653 bfd *dynobj;
7654 bfd_boolean ret = TRUE;
7655
7656 #ifdef DEBUG
7657 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7658 #endif
7659
7660 htab = ppc_elf_hash_table (info);
7661 dynobj = elf_hash_table (info)->dynobj;
7662 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7663 if (htab->is_vxworks)
7664 splt = bfd_get_section_by_name (dynobj, ".plt");
7665 else
7666 splt = NULL;
7667
7668 got = 0;
7669 if (htab->elf.hgot != NULL)
7670 got = SYM_VAL (htab->elf.hgot);
7671
7672 if (htab->elf.dynamic_sections_created)
7673 {
7674 Elf32_External_Dyn *dyncon, *dynconend;
7675
7676 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7677
7678 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7679 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7680 for (; dyncon < dynconend; dyncon++)
7681 {
7682 Elf_Internal_Dyn dyn;
7683 asection *s;
7684
7685 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7686
7687 switch (dyn.d_tag)
7688 {
7689 case DT_PLTGOT:
7690 if (htab->is_vxworks)
7691 s = htab->sgotplt;
7692 else
7693 s = htab->plt;
7694 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7695 break;
7696
7697 case DT_PLTRELSZ:
7698 dyn.d_un.d_val = htab->relplt->size;
7699 break;
7700
7701 case DT_JMPREL:
7702 s = htab->relplt;
7703 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7704 break;
7705
7706 case DT_PPC_GOT:
7707 dyn.d_un.d_ptr = got;
7708 break;
7709
7710 case DT_RELASZ:
7711 if (htab->is_vxworks)
7712 {
7713 if (htab->relplt)
7714 dyn.d_un.d_ptr -= htab->relplt->size;
7715 break;
7716 }
7717 continue;
7718
7719 default:
7720 if (htab->is_vxworks
7721 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7722 break;
7723 continue;
7724 }
7725
7726 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7727 }
7728 }
7729
7730 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7731 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7732 if (htab->got != NULL)
7733 {
7734 if (htab->elf.hgot->root.u.def.section == htab->got)
7735 {
7736 unsigned char *p = htab->got->contents;
7737 bfd_vma val;
7738
7739 p += htab->elf.hgot->root.u.def.value;
7740 if (htab->plt_type == PLT_OLD)
7741 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7742
7743 val = 0;
7744 if (sdyn != NULL)
7745 val = sdyn->output_section->vma + sdyn->output_offset;
7746 bfd_put_32 (output_bfd, val, p);
7747 }
7748 else
7749 {
7750 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7751 htab->elf.hgot->root.root.string,
7752 htab->got->name);
7753 bfd_set_error (bfd_error_bad_value);
7754 ret = FALSE;
7755 }
7756
7757 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7758 }
7759
7760 /* Fill in the first entry in the VxWorks procedure linkage table. */
7761 if (splt && splt->size > 0)
7762 {
7763 /* Use the right PLT. */
7764 static const bfd_vma *plt_entry = NULL;
7765 plt_entry = info->shared ?
7766 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7767
7768 if (!info->shared)
7769 {
7770 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7771
7772 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7773 splt->contents + 0);
7774 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
7775 splt->contents + 4);
7776 }
7777 else
7778 {
7779 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7780 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7781 }
7782 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7783 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7784 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7785 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7786 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7787 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7788
7789 if (! info->shared)
7790 {
7791 Elf_Internal_Rela rela;
7792 bfd_byte *loc;
7793
7794 loc = htab->srelplt2->contents;
7795
7796 /* Output the @ha relocation for the first instruction. */
7797 rela.r_offset = (htab->plt->output_section->vma
7798 + htab->plt->output_offset
7799 + 2);
7800 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7801 rela.r_addend = 0;
7802 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7803 loc += sizeof (Elf32_External_Rela);
7804
7805 /* Output the @l relocation for the second instruction. */
7806 rela.r_offset = (htab->plt->output_section->vma
7807 + htab->plt->output_offset
7808 + 6);
7809 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7810 rela.r_addend = 0;
7811 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7812 loc += sizeof (Elf32_External_Rela);
7813
7814 /* Fix up the remaining relocations. They may have the wrong
7815 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7816 in which symbols were output. */
7817 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7818 {
7819 Elf_Internal_Rela rel;
7820
7821 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7822 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7823 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7824 loc += sizeof (Elf32_External_Rela);
7825
7826 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7827 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7828 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7829 loc += sizeof (Elf32_External_Rela);
7830
7831 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7832 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7833 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7834 loc += sizeof (Elf32_External_Rela);
7835 }
7836 }
7837 }
7838
7839 if (htab->glink != NULL && htab->glink->contents != NULL)
7840 {
7841 unsigned char *p;
7842 unsigned char *endp;
7843 bfd_vma res0;
7844 unsigned int i;
7845
7846 /*
7847 * PIC glink code is the following:
7848 *
7849 * # ith PLT code stub.
7850 * addis 11,30,(plt+(i-1)*4-got)@ha
7851 * lwz 11,(plt+(i-1)*4-got)@l(11)
7852 * mtctr 11
7853 * bctr
7854 *
7855 * # A table of branches, one for each plt entry.
7856 * # The idea is that the plt call stub loads ctr and r11 with these
7857 * # addresses, so (r11 - res_0) gives the plt index * 4.
7858 * res_0: b PLTresolve
7859 * res_1: b PLTresolve
7860 * .
7861 * # Some number of entries towards the end can be nops
7862 * res_n_m3: nop
7863 * res_n_m2: nop
7864 * res_n_m1:
7865 *
7866 * PLTresolve:
7867 * addis 11,11,(1f-res_0)@ha
7868 * mflr 0
7869 * bcl 20,31,1f
7870 * 1: addi 11,11,(1b-res_0)@l
7871 * mflr 12
7872 * mtlr 0
7873 * sub 11,11,12 # r11 = index * 4
7874 * addis 12,12,(got+4-1b)@ha
7875 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7876 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7877 * mtctr 0
7878 * add 0,11,11
7879 * add 11,0,11 # r11 = index * 12 = reloc offset.
7880 * bctr
7881 */
7882 static const unsigned int pic_plt_resolve[] =
7883 {
7884 ADDIS_11_11,
7885 MFLR_0,
7886 BCL_20_31,
7887 ADDI_11_11,
7888 MFLR_12,
7889 MTLR_0,
7890 SUB_11_11_12,
7891 ADDIS_12_12,
7892 LWZ_0_12,
7893 LWZ_12_12,
7894 MTCTR_0,
7895 ADD_0_11_11,
7896 ADD_11_0_11,
7897 BCTR,
7898 NOP,
7899 NOP
7900 };
7901
7902 /*
7903 * Non-PIC glink code is a little simpler.
7904 *
7905 * # ith PLT code stub.
7906 * lis 11,(plt+(i-1)*4)@ha
7907 * lwz 11,(plt+(i-1)*4)@l(11)
7908 * mtctr 11
7909 * bctr
7910 *
7911 * The branch table is the same, then comes
7912 *
7913 * PLTresolve:
7914 * lis 12,(got+4)@ha
7915 * addis 11,11,(-res_0)@ha
7916 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7917 * addi 11,11,(-res_0)@l # r11 = index * 4
7918 * mtctr 0
7919 * add 0,11,11
7920 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7921 * add 11,0,11 # r11 = index * 12 = reloc offset.
7922 * bctr
7923 */
7924 static const unsigned int plt_resolve[] =
7925 {
7926 LIS_12,
7927 ADDIS_11_11,
7928 LWZ_0_12,
7929 ADDI_11_11,
7930 MTCTR_0,
7931 ADD_0_11_11,
7932 LWZ_12_12,
7933 ADD_11_0_11,
7934 BCTR,
7935 NOP,
7936 NOP,
7937 NOP,
7938 NOP,
7939 NOP,
7940 NOP,
7941 NOP
7942 };
7943
7944 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7945 abort ();
7946 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7947 abort ();
7948
7949 /* Build the branch table, one for each plt entry (less one),
7950 and perhaps some padding. */
7951 p = htab->glink->contents;
7952 p += htab->glink_pltresolve;
7953 endp = htab->glink->contents;
7954 endp += htab->glink->size - GLINK_PLTRESOLVE;
7955 while (p < endp - 8 * 4)
7956 {
7957 bfd_put_32 (output_bfd, B + endp - p, p);
7958 p += 4;
7959 }
7960 while (p < endp)
7961 {
7962 bfd_put_32 (output_bfd, NOP, p);
7963 p += 4;
7964 }
7965
7966 res0 = (htab->glink_pltresolve
7967 + htab->glink->output_section->vma
7968 + htab->glink->output_offset);
7969
7970 /* Last comes the PLTresolve stub. */
7971 if (info->shared || info->pie)
7972 {
7973 bfd_vma bcl;
7974
7975 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7976 {
7977 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7978 p += 4;
7979 }
7980 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7981
7982 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7983 + htab->glink->output_section->vma
7984 + htab->glink->output_offset);
7985
7986 bfd_put_32 (output_bfd,
7987 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7988 bfd_put_32 (output_bfd,
7989 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7990 bfd_put_32 (output_bfd,
7991 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7992 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7993 {
7994 bfd_put_32 (output_bfd,
7995 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7996 bfd_put_32 (output_bfd,
7997 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7998 }
7999 else
8000 {
8001 bfd_put_32 (output_bfd,
8002 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8003 bfd_put_32 (output_bfd,
8004 LWZ_12_12 + 4, p + 9*4);
8005 }
8006 }
8007 else
8008 {
8009 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8010 {
8011 bfd_put_32 (output_bfd, plt_resolve[i], p);
8012 p += 4;
8013 }
8014 p -= 4 * ARRAY_SIZE (plt_resolve);
8015
8016 bfd_put_32 (output_bfd,
8017 LIS_12 + PPC_HA (got + 4), p + 0*4);
8018 bfd_put_32 (output_bfd,
8019 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8020 bfd_put_32 (output_bfd,
8021 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8022 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8023 {
8024 bfd_put_32 (output_bfd,
8025 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8026 bfd_put_32 (output_bfd,
8027 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8028 }
8029 else
8030 {
8031 bfd_put_32 (output_bfd,
8032 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8033 bfd_put_32 (output_bfd,
8034 LWZ_12_12 + 4, p + 6*4);
8035 }
8036 }
8037 }
8038
8039 return ret;
8040 }
8041 \f
8042 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8043 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8044 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8045 #define TARGET_BIG_NAME "elf32-powerpc"
8046 #define ELF_ARCH bfd_arch_powerpc
8047 #define ELF_MACHINE_CODE EM_PPC
8048 #ifdef __QNXTARGET__
8049 #define ELF_MAXPAGESIZE 0x1000
8050 #else
8051 #define ELF_MAXPAGESIZE 0x10000
8052 #endif
8053 #define ELF_MINPAGESIZE 0x1000
8054 #define ELF_COMMONPAGESIZE 0x1000
8055 #define elf_info_to_howto ppc_elf_info_to_howto
8056
8057 #ifdef EM_CYGNUS_POWERPC
8058 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8059 #endif
8060
8061 #ifdef EM_PPC_OLD
8062 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8063 #endif
8064
8065 #define elf_backend_plt_not_loaded 1
8066 #define elf_backend_can_gc_sections 1
8067 #define elf_backend_can_refcount 1
8068 #define elf_backend_rela_normal 1
8069
8070 #define bfd_elf32_mkobject ppc_elf_mkobject
8071 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8072 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8073 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8074 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8075 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8076 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8077 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8078
8079 #define elf_backend_object_p ppc_elf_object_p
8080 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8081 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8082 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8083 #define elf_backend_relocate_section ppc_elf_relocate_section
8084 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8085 #define elf_backend_check_relocs ppc_elf_check_relocs
8086 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8087 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8088 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8089 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8090 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8091 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8092 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8093 #define elf_backend_fake_sections ppc_elf_fake_sections
8094 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8095 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8096 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8097 #define elf_backend_write_core_note ppc_elf_write_core_note
8098 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8099 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8100 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8101 #define elf_backend_write_section ppc_elf_write_section
8102 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8103 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8104 #define elf_backend_action_discarded ppc_elf_action_discarded
8105 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8106
8107 #include "elf32-target.h"
8108
8109 /* VxWorks Target */
8110
8111 #undef TARGET_LITTLE_SYM
8112 #undef TARGET_LITTLE_NAME
8113
8114 #undef TARGET_BIG_SYM
8115 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8116 #undef TARGET_BIG_NAME
8117 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8118
8119 /* VxWorks uses the elf default section flags for .plt. */
8120 static const struct bfd_elf_special_section *
8121 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8122 {
8123 if (sec->name == NULL)
8124 return NULL;
8125
8126 if (strcmp (sec->name, ".plt") == 0)
8127 return _bfd_elf_get_sec_type_attr (abfd, sec);
8128
8129 return ppc_elf_get_sec_type_attr (abfd, sec);
8130 }
8131
8132 /* Like ppc_elf_link_hash_table_create, but overrides
8133 appropriately for VxWorks. */
8134 static struct bfd_link_hash_table *
8135 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8136 {
8137 struct bfd_link_hash_table *ret;
8138
8139 ret = ppc_elf_link_hash_table_create (abfd);
8140 if (ret)
8141 {
8142 struct ppc_elf_link_hash_table *htab
8143 = (struct ppc_elf_link_hash_table *)ret;
8144 htab->is_vxworks = 1;
8145 htab->plt_type = PLT_VXWORKS;
8146 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8147 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8148 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8149 }
8150 return ret;
8151 }
8152
8153 /* Tweak magic VxWorks symbols as they are loaded. */
8154 static bfd_boolean
8155 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8156 struct bfd_link_info *info,
8157 Elf_Internal_Sym *sym,
8158 const char **namep ATTRIBUTE_UNUSED,
8159 flagword *flagsp ATTRIBUTE_UNUSED,
8160 asection **secp,
8161 bfd_vma *valp)
8162 {
8163 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8164 valp))
8165 return FALSE;
8166
8167 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8168 }
8169
8170 static void
8171 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8172 {
8173 ppc_elf_final_write_processing(abfd, linker);
8174 elf_vxworks_final_write_processing(abfd, linker);
8175 }
8176
8177 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8178 define it. */
8179 #undef elf_backend_want_plt_sym
8180 #define elf_backend_want_plt_sym 1
8181 #undef elf_backend_want_got_plt
8182 #define elf_backend_want_got_plt 1
8183 #undef elf_backend_got_symbol_offset
8184 #define elf_backend_got_symbol_offset 0
8185 #undef elf_backend_plt_not_loaded
8186 #define elf_backend_plt_not_loaded 0
8187 #undef elf_backend_plt_readonly
8188 #define elf_backend_plt_readonly 1
8189 #undef elf_backend_got_header_size
8190 #define elf_backend_got_header_size 12
8191
8192 #undef bfd_elf32_get_synthetic_symtab
8193
8194 #undef bfd_elf32_bfd_link_hash_table_create
8195 #define bfd_elf32_bfd_link_hash_table_create \
8196 ppc_elf_vxworks_link_hash_table_create
8197 #undef elf_backend_add_symbol_hook
8198 #define elf_backend_add_symbol_hook \
8199 ppc_elf_vxworks_add_symbol_hook
8200 #undef elf_backend_link_output_symbol_hook
8201 #define elf_backend_link_output_symbol_hook \
8202 elf_vxworks_link_output_symbol_hook
8203 #undef elf_backend_final_write_processing
8204 #define elf_backend_final_write_processing \
8205 ppc_elf_vxworks_final_write_processing
8206 #undef elf_backend_get_sec_type_attr
8207 #define elf_backend_get_sec_type_attr \
8208 ppc_elf_vxworks_get_sec_type_attr
8209 #undef elf_backend_emit_relocs
8210 #define elf_backend_emit_relocs \
8211 elf_vxworks_emit_relocs
8212
8213 #undef elf32_bed
8214 #define elf32_bed ppc_elf_vxworks_bed
8215
8216 #include "elf32-target.h"