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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 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 if (htab->elf.dynobj == NULL)
3772 htab->elf.dynobj = abfd;
3773
3774 sreloc = _bfd_elf_make_dynamic_reloc_section
3775 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3776
3777 if (sreloc == NULL)
3778 return FALSE;
3779 }
3780
3781 /* If this is a global symbol, we count the number of
3782 relocations we need for this symbol. */
3783 if (h != NULL)
3784 {
3785 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3786 }
3787 else
3788 {
3789 /* Track dynamic relocs needed for local syms too.
3790 We really need local syms available to do this
3791 easily. Oh well. */
3792
3793 asection *s;
3794 void *vpp;
3795
3796 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3797 sec, r_symndx);
3798 if (s == NULL)
3799 return FALSE;
3800
3801 vpp = &elf_section_data (s)->local_dynrel;
3802 head = (struct ppc_elf_dyn_relocs **) vpp;
3803 }
3804
3805 p = *head;
3806 if (p == NULL || p->sec != sec)
3807 {
3808 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3809 if (p == NULL)
3810 return FALSE;
3811 p->next = *head;
3812 *head = p;
3813 p->sec = sec;
3814 p->count = 0;
3815 p->pc_count = 0;
3816 }
3817
3818 p->count += 1;
3819 if (!must_be_dyn_reloc (info, r_type))
3820 p->pc_count += 1;
3821 }
3822
3823 break;
3824 }
3825 }
3826
3827 return TRUE;
3828 }
3829 \f
3830
3831 /* Merge object attributes from IBFD into OBFD. Raise an error if
3832 there are conflicting attributes. */
3833 static bfd_boolean
3834 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3835 {
3836 obj_attribute *in_attr, *in_attrs;
3837 obj_attribute *out_attr, *out_attrs;
3838
3839 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3840 {
3841 /* This is the first object. Copy the attributes. */
3842 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3843
3844 /* Use the Tag_null value to indicate the attributes have been
3845 initialized. */
3846 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3847
3848 return TRUE;
3849 }
3850
3851 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3852 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3853
3854 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3855 non-conflicting ones. */
3856 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3857 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3858 if (in_attr->i != out_attr->i)
3859 {
3860 out_attr->type = 1;
3861 if (out_attr->i == 0)
3862 out_attr->i = in_attr->i;
3863 else if (in_attr->i == 0)
3864 ;
3865 else if (out_attr->i == 1 && in_attr->i == 2)
3866 _bfd_error_handler
3867 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3868 else if (out_attr->i == 1 && in_attr->i == 3)
3869 _bfd_error_handler
3870 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3871 obfd, ibfd);
3872 else if (out_attr->i == 3 && in_attr->i == 1)
3873 _bfd_error_handler
3874 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3875 ibfd, obfd);
3876 else if (out_attr->i == 3 && in_attr->i == 2)
3877 _bfd_error_handler
3878 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3879 ibfd, obfd);
3880 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3881 _bfd_error_handler
3882 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3883 else if (in_attr->i > 3)
3884 _bfd_error_handler
3885 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3886 in_attr->i);
3887 else
3888 _bfd_error_handler
3889 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3890 out_attr->i);
3891 }
3892
3893 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3894 merge non-conflicting ones. */
3895 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3896 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3897 if (in_attr->i != out_attr->i)
3898 {
3899 const char *in_abi = NULL, *out_abi = NULL;
3900
3901 switch (in_attr->i)
3902 {
3903 case 1: in_abi = "generic"; break;
3904 case 2: in_abi = "AltiVec"; break;
3905 case 3: in_abi = "SPE"; break;
3906 }
3907
3908 switch (out_attr->i)
3909 {
3910 case 1: out_abi = "generic"; break;
3911 case 2: out_abi = "AltiVec"; break;
3912 case 3: out_abi = "SPE"; break;
3913 }
3914
3915 out_attr->type = 1;
3916 if (out_attr->i == 0)
3917 out_attr->i = in_attr->i;
3918 else if (in_attr->i == 0)
3919 ;
3920 /* For now, allow generic to transition to AltiVec or SPE
3921 without a warning. If GCC marked files with their stack
3922 alignment and used don't-care markings for files which are
3923 not affected by the vector ABI, we could warn about this
3924 case too. */
3925 else if (out_attr->i == 1)
3926 out_attr->i = in_attr->i;
3927 else if (in_attr->i == 1)
3928 ;
3929 else if (in_abi == NULL)
3930 _bfd_error_handler
3931 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3932 in_attr->i);
3933 else if (out_abi == NULL)
3934 _bfd_error_handler
3935 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3936 in_attr->i);
3937 else
3938 _bfd_error_handler
3939 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3940 ibfd, obfd, in_abi, out_abi);
3941 }
3942
3943 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
3944 and merge non-conflicting ones. */
3945 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
3946 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
3947 if (in_attr->i != out_attr->i)
3948 {
3949 out_attr->type = 1;
3950 if (out_attr->i == 0)
3951 out_attr->i = in_attr->i;
3952 else if (in_attr->i == 0)
3953 ;
3954 else if (out_attr->i == 1 && in_attr->i == 2)
3955 _bfd_error_handler
3956 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
3957 else if (out_attr->i == 2 && in_attr->i == 1)
3958 _bfd_error_handler
3959 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
3960 else if (in_attr->i > 2)
3961 _bfd_error_handler
3962 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
3963 in_attr->i);
3964 else
3965 _bfd_error_handler
3966 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
3967 out_attr->i);
3968 }
3969
3970 /* Merge Tag_compatibility attributes and any common GNU ones. */
3971 _bfd_elf_merge_object_attributes (ibfd, obfd);
3972
3973 return TRUE;
3974 }
3975
3976 /* Merge backend specific data from an object file to the output
3977 object file when linking. */
3978
3979 static bfd_boolean
3980 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3981 {
3982 flagword old_flags;
3983 flagword new_flags;
3984 bfd_boolean error;
3985
3986 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3987 return TRUE;
3988
3989 /* Check if we have the same endianess. */
3990 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3991 return FALSE;
3992
3993 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3994 return FALSE;
3995
3996 new_flags = elf_elfheader (ibfd)->e_flags;
3997 old_flags = elf_elfheader (obfd)->e_flags;
3998 if (!elf_flags_init (obfd))
3999 {
4000 /* First call, no flags set. */
4001 elf_flags_init (obfd) = TRUE;
4002 elf_elfheader (obfd)->e_flags = new_flags;
4003 }
4004
4005 /* Compatible flags are ok. */
4006 else if (new_flags == old_flags)
4007 ;
4008
4009 /* Incompatible flags. */
4010 else
4011 {
4012 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4013 to be linked with either. */
4014 error = FALSE;
4015 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4016 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4017 {
4018 error = TRUE;
4019 (*_bfd_error_handler)
4020 (_("%B: compiled with -mrelocatable and linked with "
4021 "modules compiled normally"), ibfd);
4022 }
4023 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4024 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4025 {
4026 error = TRUE;
4027 (*_bfd_error_handler)
4028 (_("%B: compiled normally and linked with "
4029 "modules compiled with -mrelocatable"), ibfd);
4030 }
4031
4032 /* The output is -mrelocatable-lib iff both the input files are. */
4033 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4034 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4035
4036 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4037 but each input file is either -mrelocatable or -mrelocatable-lib. */
4038 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4039 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4040 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4041 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4042
4043 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4044 any module uses it. */
4045 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4046
4047 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4048 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4049
4050 /* Warn about any other mismatches. */
4051 if (new_flags != old_flags)
4052 {
4053 error = TRUE;
4054 (*_bfd_error_handler)
4055 (_("%B: uses different e_flags (0x%lx) fields "
4056 "than previous modules (0x%lx)"),
4057 ibfd, (long) new_flags, (long) old_flags);
4058 }
4059
4060 if (error)
4061 {
4062 bfd_set_error (bfd_error_bad_value);
4063 return FALSE;
4064 }
4065 }
4066
4067 return TRUE;
4068 }
4069 \f
4070 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4071 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4072 int
4073 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4074 struct bfd_link_info *info,
4075 enum ppc_elf_plt_type plt_style,
4076 int emit_stub_syms)
4077 {
4078 struct ppc_elf_link_hash_table *htab;
4079 flagword flags;
4080
4081 htab = ppc_elf_hash_table (info);
4082
4083 if (htab->plt_type == PLT_UNSET)
4084 {
4085 if (plt_style == PLT_OLD)
4086 htab->plt_type = PLT_OLD;
4087 else
4088 {
4089 bfd *ibfd;
4090 enum ppc_elf_plt_type plt_type = plt_style;
4091
4092 /* Look through the reloc flags left by ppc_elf_check_relocs.
4093 Use the old style bss plt if a file makes plt calls
4094 without using the new relocs, and if ld isn't given
4095 --secure-plt and we never see REL16 relocs. */
4096 if (plt_type == PLT_UNSET)
4097 plt_type = PLT_OLD;
4098 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4099 if (is_ppc_elf (ibfd))
4100 {
4101 if (ppc_elf_tdata (ibfd)->has_rel16)
4102 plt_type = PLT_NEW;
4103 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4104 {
4105 plt_type = PLT_OLD;
4106 htab->old_bfd = ibfd;
4107 break;
4108 }
4109 }
4110 htab->plt_type = plt_type;
4111 }
4112 }
4113 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4114 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4115
4116 htab->emit_stub_syms = emit_stub_syms;
4117
4118 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4119
4120 if (htab->plt_type == PLT_NEW)
4121 {
4122 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4123 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4124
4125 /* The new PLT is a loaded section. */
4126 if (htab->plt != NULL
4127 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4128 return -1;
4129
4130 /* The new GOT is not executable. */
4131 if (htab->got != NULL
4132 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4133 return -1;
4134 }
4135 else
4136 {
4137 /* Stop an unused .glink section from affecting .text alignment. */
4138 if (htab->glink != NULL
4139 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4140 return -1;
4141 }
4142 return htab->plt_type == PLT_NEW;
4143 }
4144 \f
4145 /* Return the section that should be marked against GC for a given
4146 relocation. */
4147
4148 static asection *
4149 ppc_elf_gc_mark_hook (asection *sec,
4150 struct bfd_link_info *info,
4151 Elf_Internal_Rela *rel,
4152 struct elf_link_hash_entry *h,
4153 Elf_Internal_Sym *sym)
4154 {
4155 if (h != NULL)
4156 switch (ELF32_R_TYPE (rel->r_info))
4157 {
4158 case R_PPC_GNU_VTINHERIT:
4159 case R_PPC_GNU_VTENTRY:
4160 return NULL;
4161 }
4162
4163 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4164 }
4165
4166 /* Update the got, plt and dynamic reloc reference counts for the
4167 section being removed. */
4168
4169 static bfd_boolean
4170 ppc_elf_gc_sweep_hook (bfd *abfd,
4171 struct bfd_link_info *info,
4172 asection *sec,
4173 const Elf_Internal_Rela *relocs)
4174 {
4175 struct ppc_elf_link_hash_table *htab;
4176 Elf_Internal_Shdr *symtab_hdr;
4177 struct elf_link_hash_entry **sym_hashes;
4178 bfd_signed_vma *local_got_refcounts;
4179 const Elf_Internal_Rela *rel, *relend;
4180 asection *got2;
4181
4182 if (info->relocatable)
4183 return TRUE;
4184
4185 if ((sec->flags & SEC_ALLOC) == 0)
4186 return TRUE;
4187
4188 elf_section_data (sec)->local_dynrel = NULL;
4189
4190 htab = ppc_elf_hash_table (info);
4191 symtab_hdr = &elf_symtab_hdr (abfd);
4192 sym_hashes = elf_sym_hashes (abfd);
4193 local_got_refcounts = elf_local_got_refcounts (abfd);
4194 got2 = bfd_get_section_by_name (abfd, ".got2");
4195
4196 relend = relocs + sec->reloc_count;
4197 for (rel = relocs; rel < relend; rel++)
4198 {
4199 unsigned long r_symndx;
4200 enum elf_ppc_reloc_type r_type;
4201 struct elf_link_hash_entry *h = NULL;
4202
4203 r_symndx = ELF32_R_SYM (rel->r_info);
4204 if (r_symndx >= symtab_hdr->sh_info)
4205 {
4206 struct ppc_elf_dyn_relocs **pp, *p;
4207 struct ppc_elf_link_hash_entry *eh;
4208
4209 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4210 while (h->root.type == bfd_link_hash_indirect
4211 || h->root.type == bfd_link_hash_warning)
4212 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4213 eh = (struct ppc_elf_link_hash_entry *) h;
4214
4215 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4216 if (p->sec == sec)
4217 {
4218 /* Everything must go for SEC. */
4219 *pp = p->next;
4220 break;
4221 }
4222 }
4223
4224 r_type = ELF32_R_TYPE (rel->r_info);
4225 switch (r_type)
4226 {
4227 case R_PPC_GOT_TLSLD16:
4228 case R_PPC_GOT_TLSLD16_LO:
4229 case R_PPC_GOT_TLSLD16_HI:
4230 case R_PPC_GOT_TLSLD16_HA:
4231 case R_PPC_GOT_TLSGD16:
4232 case R_PPC_GOT_TLSGD16_LO:
4233 case R_PPC_GOT_TLSGD16_HI:
4234 case R_PPC_GOT_TLSGD16_HA:
4235 case R_PPC_GOT_TPREL16:
4236 case R_PPC_GOT_TPREL16_LO:
4237 case R_PPC_GOT_TPREL16_HI:
4238 case R_PPC_GOT_TPREL16_HA:
4239 case R_PPC_GOT_DTPREL16:
4240 case R_PPC_GOT_DTPREL16_LO:
4241 case R_PPC_GOT_DTPREL16_HI:
4242 case R_PPC_GOT_DTPREL16_HA:
4243 case R_PPC_GOT16:
4244 case R_PPC_GOT16_LO:
4245 case R_PPC_GOT16_HI:
4246 case R_PPC_GOT16_HA:
4247 if (h != NULL)
4248 {
4249 if (h->got.refcount > 0)
4250 h->got.refcount--;
4251 }
4252 else if (local_got_refcounts != NULL)
4253 {
4254 if (local_got_refcounts[r_symndx] > 0)
4255 local_got_refcounts[r_symndx]--;
4256 }
4257 break;
4258
4259 case R_PPC_REL24:
4260 case R_PPC_REL14:
4261 case R_PPC_REL14_BRTAKEN:
4262 case R_PPC_REL14_BRNTAKEN:
4263 case R_PPC_REL32:
4264 if (h == NULL || h == htab->elf.hgot)
4265 break;
4266 /* Fall thru */
4267
4268 case R_PPC_ADDR32:
4269 case R_PPC_ADDR24:
4270 case R_PPC_ADDR16:
4271 case R_PPC_ADDR16_LO:
4272 case R_PPC_ADDR16_HI:
4273 case R_PPC_ADDR16_HA:
4274 case R_PPC_ADDR14:
4275 case R_PPC_ADDR14_BRTAKEN:
4276 case R_PPC_ADDR14_BRNTAKEN:
4277 case R_PPC_UADDR32:
4278 case R_PPC_UADDR16:
4279 if (info->shared)
4280 break;
4281
4282 case R_PPC_PLT32:
4283 case R_PPC_PLTREL24:
4284 case R_PPC_PLTREL32:
4285 case R_PPC_PLT16_LO:
4286 case R_PPC_PLT16_HI:
4287 case R_PPC_PLT16_HA:
4288 if (h != NULL)
4289 {
4290 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4291 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4292 if (ent->plt.refcount > 0)
4293 ent->plt.refcount -= 1;
4294 }
4295 break;
4296
4297 default:
4298 break;
4299 }
4300 }
4301 return TRUE;
4302 }
4303 \f
4304 /* Set plt output section type, htab->tls_get_addr, and call the
4305 generic ELF tls_setup function. */
4306
4307 asection *
4308 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4309 {
4310 struct ppc_elf_link_hash_table *htab;
4311
4312 htab = ppc_elf_hash_table (info);
4313 if (htab->plt_type == PLT_NEW
4314 && htab->plt != NULL
4315 && htab->plt->output_section != NULL)
4316 {
4317 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4318 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4319 }
4320
4321 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4322 FALSE, FALSE, TRUE);
4323 return _bfd_elf_tls_setup (obfd, info);
4324 }
4325
4326 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4327 HASH. */
4328
4329 static bfd_boolean
4330 branch_reloc_hash_match (const bfd *ibfd,
4331 const Elf_Internal_Rela *rel,
4332 const struct elf_link_hash_entry *hash)
4333 {
4334 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4335 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4336 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4337
4338 if (r_symndx >= symtab_hdr->sh_info
4339 && (r_type == R_PPC_PLTREL24
4340 || r_type == R_PPC_LOCAL24PC
4341 || r_type == R_PPC_REL14
4342 || r_type == R_PPC_REL14_BRTAKEN
4343 || r_type == R_PPC_REL14_BRNTAKEN
4344 || r_type == R_PPC_REL24
4345 || r_type == R_PPC_ADDR24
4346 || r_type == R_PPC_ADDR14
4347 || r_type == R_PPC_ADDR14_BRTAKEN
4348 || r_type == R_PPC_ADDR14_BRNTAKEN))
4349 {
4350 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4351 struct elf_link_hash_entry *h;
4352
4353 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4354 while (h->root.type == bfd_link_hash_indirect
4355 || h->root.type == bfd_link_hash_warning)
4356 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4357 if (h == hash)
4358 return TRUE;
4359 }
4360 return FALSE;
4361 }
4362
4363 /* Run through all the TLS relocs looking for optimization
4364 opportunities. */
4365
4366 bfd_boolean
4367 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4368 struct bfd_link_info *info)
4369 {
4370 bfd *ibfd;
4371 asection *sec;
4372 struct ppc_elf_link_hash_table *htab;
4373 int pass;
4374
4375 if (info->relocatable || !info->executable)
4376 return TRUE;
4377
4378 htab = ppc_elf_hash_table (info);
4379 /* Make two passes through the relocs. First time check that tls
4380 relocs involved in setting up a tls_get_addr call are indeed
4381 followed by such a call. If they are not, exclude them from
4382 the optimizations done on the second pass. */
4383 for (pass = 0; pass < 2; ++pass)
4384 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4385 {
4386 Elf_Internal_Sym *locsyms = NULL;
4387 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4388
4389 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4390 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4391 {
4392 Elf_Internal_Rela *relstart, *rel, *relend;
4393
4394 /* Read the relocations. */
4395 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4396 info->keep_memory);
4397 if (relstart == NULL)
4398 return FALSE;
4399
4400 relend = relstart + sec->reloc_count;
4401 for (rel = relstart; rel < relend; rel++)
4402 {
4403 enum elf_ppc_reloc_type r_type;
4404 unsigned long r_symndx;
4405 struct elf_link_hash_entry *h = NULL;
4406 char *tls_mask;
4407 char tls_set, tls_clear;
4408 bfd_boolean is_local;
4409 int expecting_tls_get_addr;
4410 bfd_signed_vma *got_count;
4411
4412 r_symndx = ELF32_R_SYM (rel->r_info);
4413 if (r_symndx >= symtab_hdr->sh_info)
4414 {
4415 struct elf_link_hash_entry **sym_hashes;
4416
4417 sym_hashes = elf_sym_hashes (ibfd);
4418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4419 while (h->root.type == bfd_link_hash_indirect
4420 || h->root.type == bfd_link_hash_warning)
4421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4422 }
4423
4424 expecting_tls_get_addr = 0;
4425 is_local = FALSE;
4426 if (h == NULL
4427 || !h->def_dynamic)
4428 is_local = TRUE;
4429
4430 r_type = ELF32_R_TYPE (rel->r_info);
4431 switch (r_type)
4432 {
4433 case R_PPC_GOT_TLSLD16:
4434 case R_PPC_GOT_TLSLD16_LO:
4435 expecting_tls_get_addr = 1;
4436 /* Fall thru */
4437
4438 case R_PPC_GOT_TLSLD16_HI:
4439 case R_PPC_GOT_TLSLD16_HA:
4440 /* These relocs should never be against a symbol
4441 defined in a shared lib. Leave them alone if
4442 that turns out to be the case. */
4443 if (!is_local)
4444 continue;
4445
4446 /* LD -> LE */
4447 tls_set = 0;
4448 tls_clear = TLS_LD;
4449 break;
4450
4451 case R_PPC_GOT_TLSGD16:
4452 case R_PPC_GOT_TLSGD16_LO:
4453 expecting_tls_get_addr = 1;
4454 /* Fall thru */
4455
4456 case R_PPC_GOT_TLSGD16_HI:
4457 case R_PPC_GOT_TLSGD16_HA:
4458 if (is_local)
4459 /* GD -> LE */
4460 tls_set = 0;
4461 else
4462 /* GD -> IE */
4463 tls_set = TLS_TLS | TLS_TPRELGD;
4464 tls_clear = TLS_GD;
4465 break;
4466
4467 case R_PPC_GOT_TPREL16:
4468 case R_PPC_GOT_TPREL16_LO:
4469 case R_PPC_GOT_TPREL16_HI:
4470 case R_PPC_GOT_TPREL16_HA:
4471 if (is_local)
4472 {
4473 /* IE -> LE */
4474 tls_set = 0;
4475 tls_clear = TLS_TPREL;
4476 break;
4477 }
4478 else
4479 continue;
4480
4481 default:
4482 continue;
4483 }
4484
4485 if (pass == 0)
4486 {
4487 if (!expecting_tls_get_addr)
4488 continue;
4489
4490 if (rel + 1 < relend
4491 && branch_reloc_hash_match (ibfd, rel + 1,
4492 htab->tls_get_addr))
4493 continue;
4494
4495 /* Uh oh, we didn't find the expected call. We
4496 could just mark this symbol to exclude it
4497 from tls optimization but it's safer to skip
4498 the entire section. */
4499 sec->has_tls_reloc = 0;
4500 break;
4501 }
4502
4503 if (h != NULL)
4504 {
4505 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4506 got_count = &h->got.refcount;
4507 }
4508 else
4509 {
4510 Elf_Internal_Sym *sym;
4511 bfd_signed_vma *lgot_refs;
4512 char *lgot_masks;
4513
4514 if (locsyms == NULL)
4515 {
4516 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4517 if (locsyms == NULL)
4518 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4519 symtab_hdr->sh_info,
4520 0, NULL, NULL, NULL);
4521 if (locsyms == NULL)
4522 {
4523 if (elf_section_data (sec)->relocs != relstart)
4524 free (relstart);
4525 return FALSE;
4526 }
4527 }
4528 sym = locsyms + r_symndx;
4529 lgot_refs = elf_local_got_refcounts (ibfd);
4530 if (lgot_refs == NULL)
4531 abort ();
4532 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4533 tls_mask = &lgot_masks[r_symndx];
4534 got_count = &lgot_refs[r_symndx];
4535 }
4536
4537 if (tls_set == 0)
4538 {
4539 /* We managed to get rid of a got entry. */
4540 if (*got_count > 0)
4541 *got_count -= 1;
4542 }
4543
4544 if (expecting_tls_get_addr)
4545 {
4546 struct plt_entry *ent;
4547
4548 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4549 if (ent != NULL && ent->plt.refcount > 0)
4550 ent->plt.refcount -= 1;
4551 }
4552
4553 *tls_mask |= tls_set;
4554 *tls_mask &= ~tls_clear;
4555 }
4556
4557 if (elf_section_data (sec)->relocs != relstart)
4558 free (relstart);
4559 }
4560
4561 if (locsyms != NULL
4562 && (symtab_hdr->contents != (unsigned char *) locsyms))
4563 {
4564 if (!info->keep_memory)
4565 free (locsyms);
4566 else
4567 symtab_hdr->contents = (unsigned char *) locsyms;
4568 }
4569 }
4570 return TRUE;
4571 }
4572 \f
4573 /* Return true if we have dynamic relocs that apply to read-only sections. */
4574
4575 static bfd_boolean
4576 readonly_dynrelocs (struct elf_link_hash_entry *h)
4577 {
4578 struct ppc_elf_dyn_relocs *p;
4579
4580 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4581 {
4582 asection *s = p->sec->output_section;
4583
4584 if (s != NULL
4585 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4586 == (SEC_READONLY | SEC_ALLOC)))
4587 return TRUE;
4588 }
4589 return FALSE;
4590 }
4591
4592 /* Adjust a symbol defined by a dynamic object and referenced by a
4593 regular object. The current definition is in some section of the
4594 dynamic object, but we're not including those sections. We have to
4595 change the definition to something the rest of the link can
4596 understand. */
4597
4598 static bfd_boolean
4599 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4600 struct elf_link_hash_entry *h)
4601 {
4602 struct ppc_elf_link_hash_table *htab;
4603 asection *s;
4604
4605 #ifdef DEBUG
4606 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4607 h->root.root.string);
4608 #endif
4609
4610 /* Make sure we know what is going on here. */
4611 htab = ppc_elf_hash_table (info);
4612 BFD_ASSERT (htab->elf.dynobj != NULL
4613 && (h->needs_plt
4614 || h->u.weakdef != NULL
4615 || (h->def_dynamic
4616 && h->ref_regular
4617 && !h->def_regular)));
4618
4619 /* Deal with function syms. */
4620 if (h->type == STT_FUNC
4621 || h->needs_plt)
4622 {
4623 /* Clear procedure linkage table information for any symbol that
4624 won't need a .plt entry. */
4625 struct plt_entry *ent;
4626 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4627 if (ent->plt.refcount > 0)
4628 break;
4629 if (ent == NULL
4630 || SYMBOL_CALLS_LOCAL (info, h)
4631 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4632 && h->root.type == bfd_link_hash_undefweak))
4633 {
4634 /* A PLT entry is not required/allowed when:
4635
4636 1. We are not using ld.so; because then the PLT entry
4637 can't be set up, so we can't use one. In this case,
4638 ppc_elf_adjust_dynamic_symbol won't even be called.
4639
4640 2. GC has rendered the entry unused.
4641
4642 3. We know for certain that a call to this symbol
4643 will go to this object, or will remain undefined. */
4644 h->plt.plist = NULL;
4645 h->needs_plt = 0;
4646 }
4647 else
4648 {
4649 /* After adjust_dynamic_symbol, non_got_ref set means that
4650 dyn_relocs for this symbol should be discarded.
4651 If we get here we know we are making a PLT entry for this
4652 symbol, and in an executable we'd normally resolve
4653 relocations against this symbol to the PLT entry. Allow
4654 dynamic relocs if the reference is weak, and the dynamic
4655 relocs will not cause text relocation. */
4656 if (!h->ref_regular_nonweak
4657 && h->non_got_ref
4658 && !htab->is_vxworks
4659 && !ppc_elf_hash_entry (h)->has_sda_refs
4660 && !readonly_dynrelocs (h))
4661 h->non_got_ref = 0;
4662 }
4663 return TRUE;
4664 }
4665 else
4666 h->plt.plist = NULL;
4667
4668 /* If this is a weak symbol, and there is a real definition, the
4669 processor independent code will have arranged for us to see the
4670 real definition first, and we can just use the same value. */
4671 if (h->u.weakdef != NULL)
4672 {
4673 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4674 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4675 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4676 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4677 if (ELIMINATE_COPY_RELOCS)
4678 h->non_got_ref = h->u.weakdef->non_got_ref;
4679 return TRUE;
4680 }
4681
4682 /* This is a reference to a symbol defined by a dynamic object which
4683 is not a function. */
4684
4685 /* If we are creating a shared library, we must presume that the
4686 only references to the symbol are via the global offset table.
4687 For such cases we need not do anything here; the relocations will
4688 be handled correctly by relocate_section. */
4689 if (info->shared)
4690 return TRUE;
4691
4692 /* If there are no references to this symbol that do not use the
4693 GOT, we don't need to generate a copy reloc. */
4694 if (!h->non_got_ref)
4695 return TRUE;
4696
4697 /* If we didn't find any dynamic relocs in read-only sections, then
4698 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4699 We can't do this if there are any small data relocations. This
4700 doesn't work on VxWorks, where we can not have dynamic
4701 relocations (other than copy and jump slot relocations) in an
4702 executable. */
4703 if (ELIMINATE_COPY_RELOCS
4704 && !ppc_elf_hash_entry (h)->has_sda_refs
4705 && !htab->is_vxworks
4706 && !h->def_regular
4707 && !readonly_dynrelocs (h))
4708 {
4709 h->non_got_ref = 0;
4710 return TRUE;
4711 }
4712
4713 if (h->size == 0)
4714 {
4715 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4716 h->root.root.string);
4717 return TRUE;
4718 }
4719
4720 /* We must allocate the symbol in our .dynbss section, which will
4721 become part of the .bss section of the executable. There will be
4722 an entry for this symbol in the .dynsym section. The dynamic
4723 object will contain position independent code, so all references
4724 from the dynamic object to this symbol will go through the global
4725 offset table. The dynamic linker will use the .dynsym entry to
4726 determine the address it must put in the global offset table, so
4727 both the dynamic object and the regular object will refer to the
4728 same memory location for the variable.
4729
4730 Of course, if the symbol is referenced using SDAREL relocs, we
4731 must instead allocate it in .sbss. */
4732
4733 if (ppc_elf_hash_entry (h)->has_sda_refs)
4734 s = htab->dynsbss;
4735 else
4736 s = htab->dynbss;
4737 BFD_ASSERT (s != NULL);
4738
4739 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4740 copy the initial value out of the dynamic object and into the
4741 runtime process image. We need to remember the offset into the
4742 .rela.bss section we are going to use. */
4743 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4744 {
4745 asection *srel;
4746
4747 if (ppc_elf_hash_entry (h)->has_sda_refs)
4748 srel = htab->relsbss;
4749 else
4750 srel = htab->relbss;
4751 BFD_ASSERT (srel != NULL);
4752 srel->size += sizeof (Elf32_External_Rela);
4753 h->needs_copy = 1;
4754 }
4755
4756 return _bfd_elf_adjust_dynamic_copy (h, s);
4757 }
4758 \f
4759 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4760 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4761 specifying the addend on the plt relocation. For -fpic code, the sym
4762 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4763 xxxxxxxx.got2.plt_pic32.<callee>. */
4764
4765 static bfd_boolean
4766 add_stub_sym (struct plt_entry *ent,
4767 struct elf_link_hash_entry *h,
4768 struct bfd_link_info *info)
4769 {
4770 struct elf_link_hash_entry *sh;
4771 size_t len1, len2, len3;
4772 char *name;
4773 const char *stub;
4774 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4775
4776 if (info->shared || info->pie)
4777 stub = ".plt_pic32.";
4778 else
4779 stub = ".plt_call32.";
4780
4781 len1 = strlen (h->root.root.string);
4782 len2 = strlen (stub);
4783 len3 = 0;
4784 if (ent->sec)
4785 len3 = strlen (ent->sec->name);
4786 name = bfd_malloc (len1 + len2 + len3 + 9);
4787 if (name == NULL)
4788 return FALSE;
4789 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4790 if (ent->sec)
4791 memcpy (name + 8, ent->sec->name, len3);
4792 memcpy (name + 8 + len3, stub, len2);
4793 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4794 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4795 if (sh == NULL)
4796 return FALSE;
4797 if (sh->root.type == bfd_link_hash_new)
4798 {
4799 sh->root.type = bfd_link_hash_defined;
4800 sh->root.u.def.section = htab->glink;
4801 sh->root.u.def.value = ent->glink_offset;
4802 sh->ref_regular = 1;
4803 sh->def_regular = 1;
4804 sh->ref_regular_nonweak = 1;
4805 sh->forced_local = 1;
4806 sh->non_elf = 0;
4807 }
4808 return TRUE;
4809 }
4810
4811 /* Allocate NEED contiguous space in .got, and return the offset.
4812 Handles allocation of the got header when crossing 32k. */
4813
4814 static bfd_vma
4815 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4816 {
4817 bfd_vma where;
4818 unsigned int max_before_header;
4819
4820 if (htab->plt_type == PLT_VXWORKS)
4821 {
4822 where = htab->got->size;
4823 htab->got->size += need;
4824 }
4825 else
4826 {
4827 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4828 if (need <= htab->got_gap)
4829 {
4830 where = max_before_header - htab->got_gap;
4831 htab->got_gap -= need;
4832 }
4833 else
4834 {
4835 if (htab->got->size + need > max_before_header
4836 && htab->got->size <= max_before_header)
4837 {
4838 htab->got_gap = max_before_header - htab->got->size;
4839 htab->got->size = max_before_header + htab->got_header_size;
4840 }
4841 where = htab->got->size;
4842 htab->got->size += need;
4843 }
4844 }
4845 return where;
4846 }
4847
4848 /* Allocate space in associated reloc sections for dynamic relocs. */
4849
4850 static bfd_boolean
4851 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4852 {
4853 struct bfd_link_info *info = inf;
4854 struct ppc_elf_link_hash_entry *eh;
4855 struct ppc_elf_link_hash_table *htab;
4856 struct ppc_elf_dyn_relocs *p;
4857
4858 if (h->root.type == bfd_link_hash_indirect)
4859 return TRUE;
4860
4861 if (h->root.type == bfd_link_hash_warning)
4862 /* When warning symbols are created, they **replace** the "real"
4863 entry in the hash table, thus we never get to see the real
4864 symbol in a hash traversal. So look at it now. */
4865 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4866
4867 htab = ppc_elf_hash_table (info);
4868 if (htab->elf.dynamic_sections_created)
4869 {
4870 struct plt_entry *ent;
4871 bfd_boolean doneone = FALSE;
4872 bfd_vma plt_offset = 0, glink_offset = 0;
4873
4874 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4875 if (ent->plt.refcount > 0)
4876 {
4877 /* Make sure this symbol is output as a dynamic symbol. */
4878 if (h->dynindx == -1
4879 && !h->forced_local)
4880 {
4881 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4882 return FALSE;
4883 }
4884
4885 if (info->shared
4886 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4887 {
4888 asection *s = htab->plt;
4889
4890 if (htab->plt_type == PLT_NEW)
4891 {
4892 if (!doneone)
4893 {
4894 plt_offset = s->size;
4895 s->size += 4;
4896 }
4897 ent->plt.offset = plt_offset;
4898
4899 s = htab->glink;
4900 if (!doneone || info->shared || info->pie)
4901 {
4902 glink_offset = s->size;
4903 s->size += GLINK_ENTRY_SIZE;
4904 }
4905 if (!doneone
4906 && !info->shared
4907 && h->def_dynamic
4908 && !h->def_regular)
4909 {
4910 h->root.u.def.section = s;
4911 h->root.u.def.value = glink_offset;
4912 }
4913 ent->glink_offset = glink_offset;
4914
4915 if (htab->emit_stub_syms
4916 && !add_stub_sym (ent, h, info))
4917 return FALSE;
4918 }
4919 else
4920 {
4921 if (!doneone)
4922 {
4923 /* If this is the first .plt entry, make room
4924 for the special first entry. */
4925 if (s->size == 0)
4926 s->size += htab->plt_initial_entry_size;
4927
4928 /* The PowerPC PLT is actually composed of two
4929 parts, the first part is 2 words (for a load
4930 and a jump), and then there is a remaining
4931 word available at the end. */
4932 plt_offset = (htab->plt_initial_entry_size
4933 + (htab->plt_slot_size
4934 * ((s->size
4935 - htab->plt_initial_entry_size)
4936 / htab->plt_entry_size)));
4937
4938 /* If this symbol is not defined in a regular
4939 file, and we are not generating a shared
4940 library, then set the symbol to this location
4941 in the .plt. This is required to make
4942 function pointers compare as equal between
4943 the normal executable and the shared library. */
4944 if (! info->shared
4945 && h->def_dynamic
4946 && !h->def_regular)
4947 {
4948 h->root.u.def.section = s;
4949 h->root.u.def.value = plt_offset;
4950 }
4951
4952 /* Make room for this entry. */
4953 s->size += htab->plt_entry_size;
4954 /* After the 8192nd entry, room for two entries
4955 is allocated. */
4956 if (htab->plt_type == PLT_OLD
4957 && (s->size - htab->plt_initial_entry_size)
4958 / htab->plt_entry_size
4959 > PLT_NUM_SINGLE_ENTRIES)
4960 s->size += htab->plt_entry_size;
4961 }
4962 ent->plt.offset = plt_offset;
4963 }
4964
4965 /* We also need to make an entry in the .rela.plt section. */
4966 if (!doneone)
4967 {
4968 htab->relplt->size += sizeof (Elf32_External_Rela);
4969
4970 if (htab->plt_type == PLT_VXWORKS)
4971 {
4972 /* Allocate space for the unloaded relocations. */
4973 if (!info->shared)
4974 {
4975 if (ent->plt.offset
4976 == (bfd_vma) htab->plt_initial_entry_size)
4977 {
4978 htab->srelplt2->size
4979 += sizeof (Elf32_External_Rela)
4980 * VXWORKS_PLTRESOLVE_RELOCS;
4981 }
4982
4983 htab->srelplt2->size
4984 += sizeof (Elf32_External_Rela)
4985 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4986 }
4987
4988 /* Every PLT entry has an associated GOT entry in
4989 .got.plt. */
4990 htab->sgotplt->size += 4;
4991 }
4992 doneone = TRUE;
4993 }
4994 }
4995 else
4996 ent->plt.offset = (bfd_vma) -1;
4997 }
4998 else
4999 ent->plt.offset = (bfd_vma) -1;
5000
5001 if (!doneone)
5002 {
5003 h->plt.plist = NULL;
5004 h->needs_plt = 0;
5005 }
5006 }
5007 else
5008 {
5009 h->plt.plist = NULL;
5010 h->needs_plt = 0;
5011 }
5012
5013 eh = (struct ppc_elf_link_hash_entry *) h;
5014 if (eh->elf.got.refcount > 0)
5015 {
5016 bfd_boolean dyn;
5017 unsigned int need;
5018
5019 /* Make sure this symbol is output as a dynamic symbol. */
5020 if (eh->elf.dynindx == -1
5021 && !eh->elf.forced_local
5022 && htab->elf.dynamic_sections_created)
5023 {
5024 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5025 return FALSE;
5026 }
5027
5028 need = 0;
5029 if ((eh->tls_mask & TLS_TLS) != 0)
5030 {
5031 if ((eh->tls_mask & TLS_LD) != 0)
5032 {
5033 if (!eh->elf.def_dynamic)
5034 /* We'll just use htab->tlsld_got.offset. This should
5035 always be the case. It's a little odd if we have
5036 a local dynamic reloc against a non-local symbol. */
5037 htab->tlsld_got.refcount += 1;
5038 else
5039 need += 8;
5040 }
5041 if ((eh->tls_mask & TLS_GD) != 0)
5042 need += 8;
5043 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5044 need += 4;
5045 if ((eh->tls_mask & TLS_DTPREL) != 0)
5046 need += 4;
5047 }
5048 else
5049 need += 4;
5050 if (need == 0)
5051 eh->elf.got.offset = (bfd_vma) -1;
5052 else
5053 {
5054 eh->elf.got.offset = allocate_got (htab, need);
5055 dyn = htab->elf.dynamic_sections_created;
5056 if ((info->shared
5057 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5058 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5059 || eh->elf.root.type != bfd_link_hash_undefweak))
5060 {
5061 /* All the entries we allocated need relocs.
5062 Except LD only needs one. */
5063 if ((eh->tls_mask & TLS_LD) != 0
5064 && eh->elf.def_dynamic)
5065 need -= 4;
5066 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5067 }
5068 }
5069 }
5070 else
5071 eh->elf.got.offset = (bfd_vma) -1;
5072
5073 if (eh->dyn_relocs == NULL
5074 || !htab->elf.dynamic_sections_created)
5075 return TRUE;
5076
5077 /* In the shared -Bsymbolic case, discard space allocated for
5078 dynamic pc-relative relocs against symbols which turn out to be
5079 defined in regular objects. For the normal shared case, discard
5080 space for relocs that have become local due to symbol visibility
5081 changes. */
5082
5083 if (info->shared)
5084 {
5085 /* Relocs that use pc_count are those that appear on a call insn,
5086 or certain REL relocs (see must_be_dyn_reloc) that can be
5087 generated via assembly. We want calls to protected symbols to
5088 resolve directly to the function rather than going via the plt.
5089 If people want function pointer comparisons to work as expected
5090 then they should avoid writing weird assembly. */
5091 if (SYMBOL_CALLS_LOCAL (info, h))
5092 {
5093 struct ppc_elf_dyn_relocs **pp;
5094
5095 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5096 {
5097 p->count -= p->pc_count;
5098 p->pc_count = 0;
5099 if (p->count == 0)
5100 *pp = p->next;
5101 else
5102 pp = &p->next;
5103 }
5104 }
5105
5106 if (htab->is_vxworks)
5107 {
5108 struct ppc_elf_dyn_relocs **pp;
5109
5110 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5111 {
5112 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5113 *pp = p->next;
5114 else
5115 pp = &p->next;
5116 }
5117 }
5118
5119 /* Discard relocs on undefined symbols that must be local. */
5120 if (eh->dyn_relocs != NULL
5121 && h->root.type == bfd_link_hash_undefined
5122 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5123 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5124 eh->dyn_relocs = NULL;
5125
5126 /* Also discard relocs on undefined weak syms with non-default
5127 visibility. */
5128 if (eh->dyn_relocs != NULL
5129 && h->root.type == bfd_link_hash_undefweak)
5130 {
5131 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5132 eh->dyn_relocs = NULL;
5133
5134 /* Make sure undefined weak symbols are output as a dynamic
5135 symbol in PIEs. */
5136 else if (h->dynindx == -1
5137 && !h->forced_local)
5138 {
5139 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5140 return FALSE;
5141 }
5142 }
5143 }
5144 else if (ELIMINATE_COPY_RELOCS)
5145 {
5146 /* For the non-shared case, discard space for relocs against
5147 symbols which turn out to need copy relocs or are not
5148 dynamic. */
5149
5150 if (!h->non_got_ref
5151 && !h->def_regular)
5152 {
5153 /* Make sure this symbol is output as a dynamic symbol.
5154 Undefined weak syms won't yet be marked as dynamic. */
5155 if (h->dynindx == -1
5156 && !h->forced_local)
5157 {
5158 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5159 return FALSE;
5160 }
5161
5162 /* If that succeeded, we know we'll be keeping all the
5163 relocs. */
5164 if (h->dynindx != -1)
5165 goto keep;
5166 }
5167
5168 eh->dyn_relocs = NULL;
5169
5170 keep: ;
5171 }
5172
5173 /* Finally, allocate space. */
5174 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5175 {
5176 asection *sreloc = elf_section_data (p->sec)->sreloc;
5177 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5178 }
5179
5180 return TRUE;
5181 }
5182
5183 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5184 read-only sections. */
5185
5186 static bfd_boolean
5187 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5188 {
5189 if (h->root.type == bfd_link_hash_indirect)
5190 return TRUE;
5191
5192 if (h->root.type == bfd_link_hash_warning)
5193 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5194
5195 if (readonly_dynrelocs (h))
5196 {
5197 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5198
5199 /* Not an error, just cut short the traversal. */
5200 return FALSE;
5201 }
5202 return TRUE;
5203 }
5204
5205 /* Set the sizes of the dynamic sections. */
5206
5207 static bfd_boolean
5208 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5209 struct bfd_link_info *info)
5210 {
5211 struct ppc_elf_link_hash_table *htab;
5212 asection *s;
5213 bfd_boolean relocs;
5214 bfd *ibfd;
5215
5216 #ifdef DEBUG
5217 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5218 #endif
5219
5220 htab = ppc_elf_hash_table (info);
5221 BFD_ASSERT (htab->elf.dynobj != NULL);
5222
5223 if (elf_hash_table (info)->dynamic_sections_created)
5224 {
5225 /* Set the contents of the .interp section to the interpreter. */
5226 if (info->executable)
5227 {
5228 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5229 BFD_ASSERT (s != NULL);
5230 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5231 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5232 }
5233 }
5234
5235 if (htab->plt_type == PLT_OLD)
5236 htab->got_header_size = 16;
5237 else if (htab->plt_type == PLT_NEW)
5238 htab->got_header_size = 12;
5239
5240 /* Set up .got offsets for local syms, and space for local dynamic
5241 relocs. */
5242 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5243 {
5244 bfd_signed_vma *local_got;
5245 bfd_signed_vma *end_local_got;
5246 char *lgot_masks;
5247 bfd_size_type locsymcount;
5248 Elf_Internal_Shdr *symtab_hdr;
5249
5250 if (!is_ppc_elf (ibfd))
5251 continue;
5252
5253 for (s = ibfd->sections; s != NULL; s = s->next)
5254 {
5255 struct ppc_elf_dyn_relocs *p;
5256
5257 for (p = ((struct ppc_elf_dyn_relocs *)
5258 elf_section_data (s)->local_dynrel);
5259 p != NULL;
5260 p = p->next)
5261 {
5262 if (!bfd_is_abs_section (p->sec)
5263 && bfd_is_abs_section (p->sec->output_section))
5264 {
5265 /* Input section has been discarded, either because
5266 it is a copy of a linkonce section or due to
5267 linker script /DISCARD/, so we'll be discarding
5268 the relocs too. */
5269 }
5270 else if (htab->is_vxworks
5271 && strcmp (p->sec->output_section->name,
5272 ".tls_vars") == 0)
5273 {
5274 /* Relocations in vxworks .tls_vars sections are
5275 handled specially by the loader. */
5276 }
5277 else if (p->count != 0)
5278 {
5279 elf_section_data (p->sec)->sreloc->size
5280 += p->count * sizeof (Elf32_External_Rela);
5281 if ((p->sec->output_section->flags
5282 & (SEC_READONLY | SEC_ALLOC))
5283 == (SEC_READONLY | SEC_ALLOC))
5284 info->flags |= DF_TEXTREL;
5285 }
5286 }
5287 }
5288
5289 local_got = elf_local_got_refcounts (ibfd);
5290 if (!local_got)
5291 continue;
5292
5293 symtab_hdr = &elf_symtab_hdr (ibfd);
5294 locsymcount = symtab_hdr->sh_info;
5295 end_local_got = local_got + locsymcount;
5296 lgot_masks = (char *) end_local_got;
5297 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5298 if (*local_got > 0)
5299 {
5300 unsigned int need = 0;
5301 if ((*lgot_masks & TLS_TLS) != 0)
5302 {
5303 if ((*lgot_masks & TLS_GD) != 0)
5304 need += 8;
5305 if ((*lgot_masks & TLS_LD) != 0)
5306 htab->tlsld_got.refcount += 1;
5307 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5308 need += 4;
5309 if ((*lgot_masks & TLS_DTPREL) != 0)
5310 need += 4;
5311 }
5312 else
5313 need += 4;
5314 if (need == 0)
5315 *local_got = (bfd_vma) -1;
5316 else
5317 {
5318 *local_got = allocate_got (htab, need);
5319 if (info->shared)
5320 htab->relgot->size += (need
5321 * (sizeof (Elf32_External_Rela) / 4));
5322 }
5323 }
5324 else
5325 *local_got = (bfd_vma) -1;
5326 }
5327
5328 /* Allocate space for global sym dynamic relocs. */
5329 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5330
5331 if (htab->tlsld_got.refcount > 0)
5332 {
5333 htab->tlsld_got.offset = allocate_got (htab, 8);
5334 if (info->shared)
5335 htab->relgot->size += sizeof (Elf32_External_Rela);
5336 }
5337 else
5338 htab->tlsld_got.offset = (bfd_vma) -1;
5339
5340 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5341 {
5342 unsigned int g_o_t = 32768;
5343
5344 /* If we haven't allocated the header, do so now. When we get here,
5345 for old plt/got the got size will be 0 to 32764 (not allocated),
5346 or 32780 to 65536 (header allocated). For new plt/got, the
5347 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5348 if (htab->got->size <= 32768)
5349 {
5350 g_o_t = htab->got->size;
5351 if (htab->plt_type == PLT_OLD)
5352 g_o_t += 4;
5353 htab->got->size += htab->got_header_size;
5354 }
5355
5356 htab->elf.hgot->root.u.def.value = g_o_t;
5357 }
5358
5359 if (htab->glink != NULL && htab->glink->size != 0)
5360 {
5361 htab->glink_pltresolve = htab->glink->size;
5362 /* Space for the branch table. */
5363 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5364 /* Pad out to align the start of PLTresolve. */
5365 htab->glink->size += -htab->glink->size & 15;
5366 htab->glink->size += GLINK_PLTRESOLVE;
5367
5368 if (htab->emit_stub_syms)
5369 {
5370 struct elf_link_hash_entry *sh;
5371 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5372 TRUE, FALSE, FALSE);
5373 if (sh == NULL)
5374 return FALSE;
5375 if (sh->root.type == bfd_link_hash_new)
5376 {
5377 sh->root.type = bfd_link_hash_defined;
5378 sh->root.u.def.section = htab->glink;
5379 sh->root.u.def.value = htab->glink_pltresolve;
5380 sh->ref_regular = 1;
5381 sh->def_regular = 1;
5382 sh->ref_regular_nonweak = 1;
5383 sh->forced_local = 1;
5384 sh->non_elf = 0;
5385 }
5386 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5387 TRUE, FALSE, FALSE);
5388 if (sh == NULL)
5389 return FALSE;
5390 if (sh->root.type == bfd_link_hash_new)
5391 {
5392 sh->root.type = bfd_link_hash_defined;
5393 sh->root.u.def.section = htab->glink;
5394 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5395 sh->ref_regular = 1;
5396 sh->def_regular = 1;
5397 sh->ref_regular_nonweak = 1;
5398 sh->forced_local = 1;
5399 sh->non_elf = 0;
5400 }
5401 }
5402 }
5403
5404 /* We've now determined the sizes of the various dynamic sections.
5405 Allocate memory for them. */
5406 relocs = FALSE;
5407 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5408 {
5409 bfd_boolean strip_section = TRUE;
5410
5411 if ((s->flags & SEC_LINKER_CREATED) == 0)
5412 continue;
5413
5414 if (s == htab->plt
5415 || s == htab->glink
5416 || s == htab->got
5417 || s == htab->sgotplt
5418 || s == htab->sbss
5419 || s == htab->dynbss
5420 || s == htab->dynsbss)
5421 {
5422 /* We'd like to strip these sections if they aren't needed, but if
5423 we've exported dynamic symbols from them we must leave them.
5424 It's too late to tell BFD to get rid of the symbols. */
5425 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5426 strip_section = FALSE;
5427 /* Strip this section if we don't need it; see the
5428 comment below. */
5429 }
5430 else if (s == htab->sdata[0].section
5431 || s == htab->sdata[1].section)
5432 {
5433 /* Strip these too. */
5434 }
5435 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5436 {
5437 if (s->size != 0)
5438 {
5439 /* Remember whether there are any relocation sections. */
5440 relocs = TRUE;
5441
5442 /* We use the reloc_count field as a counter if we need
5443 to copy relocs into the output file. */
5444 s->reloc_count = 0;
5445 }
5446 }
5447 else
5448 {
5449 /* It's not one of our sections, so don't allocate space. */
5450 continue;
5451 }
5452
5453 if (s->size == 0 && strip_section)
5454 {
5455 /* If we don't need this section, strip it from the
5456 output file. This is mostly to handle .rela.bss and
5457 .rela.plt. We must create both sections in
5458 create_dynamic_sections, because they must be created
5459 before the linker maps input sections to output
5460 sections. The linker does that before
5461 adjust_dynamic_symbol is called, and it is that
5462 function which decides whether anything needs to go
5463 into these sections. */
5464 s->flags |= SEC_EXCLUDE;
5465 continue;
5466 }
5467
5468 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5469 continue;
5470
5471 /* Allocate memory for the section contents. */
5472 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5473 if (s->contents == NULL)
5474 return FALSE;
5475 }
5476
5477 if (htab->elf.dynamic_sections_created)
5478 {
5479 /* Add some entries to the .dynamic section. We fill in the
5480 values later, in ppc_elf_finish_dynamic_sections, but we
5481 must add the entries now so that we get the correct size for
5482 the .dynamic section. The DT_DEBUG entry is filled in by the
5483 dynamic linker and used by the debugger. */
5484 #define add_dynamic_entry(TAG, VAL) \
5485 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5486
5487 if (info->executable)
5488 {
5489 if (!add_dynamic_entry (DT_DEBUG, 0))
5490 return FALSE;
5491 }
5492
5493 if (htab->plt != NULL && htab->plt->size != 0)
5494 {
5495 if (!add_dynamic_entry (DT_PLTGOT, 0)
5496 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5497 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5498 || !add_dynamic_entry (DT_JMPREL, 0))
5499 return FALSE;
5500 }
5501
5502 if (htab->glink != NULL && htab->glink->size != 0)
5503 {
5504 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5505 return FALSE;
5506 }
5507
5508 if (relocs)
5509 {
5510 if (!add_dynamic_entry (DT_RELA, 0)
5511 || !add_dynamic_entry (DT_RELASZ, 0)
5512 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5513 return FALSE;
5514 }
5515
5516 /* If any dynamic relocs apply to a read-only section, then we
5517 need a DT_TEXTREL entry. */
5518 if ((info->flags & DF_TEXTREL) == 0)
5519 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5520 info);
5521
5522 if ((info->flags & DF_TEXTREL) != 0)
5523 {
5524 if (!add_dynamic_entry (DT_TEXTREL, 0))
5525 return FALSE;
5526 }
5527 if (htab->is_vxworks
5528 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5529 return FALSE;
5530 }
5531 #undef add_dynamic_entry
5532
5533 return TRUE;
5534 }
5535
5536 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5537
5538 static bfd_boolean
5539 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5540 {
5541 if (h->plt.plist != NULL
5542 && !h->def_regular
5543 && (!h->pointer_equality_needed
5544 || !h->ref_regular_nonweak))
5545 return FALSE;
5546
5547 return _bfd_elf_hash_symbol (h);
5548 }
5549 \f
5550 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5551
5552 static const int shared_stub_entry[] =
5553 {
5554 0x7c0802a6, /* mflr 0 */
5555 0x429f0005, /* bcl 20, 31, .Lxxx */
5556 0x7d6802a6, /* mflr 11 */
5557 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5558 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5559 0x7c0803a6, /* mtlr 0 */
5560 0x7d6903a6, /* mtctr 11 */
5561 0x4e800420, /* bctr */
5562 };
5563
5564 static const int stub_entry[] =
5565 {
5566 0x3d600000, /* lis 11,xxx@ha */
5567 0x396b0000, /* addi 11,11,xxx@l */
5568 0x7d6903a6, /* mtctr 11 */
5569 0x4e800420, /* bctr */
5570 };
5571
5572 static bfd_boolean
5573 ppc_elf_relax_section (bfd *abfd,
5574 asection *isec,
5575 struct bfd_link_info *link_info,
5576 bfd_boolean *again)
5577 {
5578 struct one_fixup
5579 {
5580 struct one_fixup *next;
5581 asection *tsec;
5582 bfd_vma toff;
5583 bfd_vma trampoff;
5584 };
5585
5586 Elf_Internal_Shdr *symtab_hdr;
5587 bfd_byte *contents = NULL;
5588 Elf_Internal_Sym *isymbuf = NULL;
5589 Elf_Internal_Rela *internal_relocs = NULL;
5590 Elf_Internal_Rela *irel, *irelend;
5591 struct one_fixup *fixups = NULL;
5592 unsigned changes = 0;
5593 struct ppc_elf_link_hash_table *htab;
5594 bfd_size_type trampoff;
5595 asection *got2;
5596
5597 *again = FALSE;
5598
5599 /* Nothing to do if there are no relocations, and no need to do
5600 anything with non-alloc sections. */
5601 if ((isec->flags & SEC_ALLOC) == 0
5602 || (isec->flags & SEC_RELOC) == 0
5603 || isec->reloc_count == 0)
5604 return TRUE;
5605
5606 trampoff = (isec->size + 3) & (bfd_vma) -4;
5607 /* Space for a branch around any trampolines. */
5608 trampoff += 4;
5609
5610 symtab_hdr = &elf_symtab_hdr (abfd);
5611
5612 /* Get a copy of the native relocations. */
5613 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5614 link_info->keep_memory);
5615 if (internal_relocs == NULL)
5616 goto error_return;
5617
5618 htab = ppc_elf_hash_table (link_info);
5619 got2 = bfd_get_section_by_name (abfd, ".got2");
5620
5621 irelend = internal_relocs + isec->reloc_count;
5622 for (irel = internal_relocs; irel < irelend; irel++)
5623 {
5624 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5625 bfd_vma symaddr, reladdr, toff, roff;
5626 asection *tsec;
5627 struct one_fixup *f;
5628 size_t insn_offset = 0;
5629 bfd_vma max_branch_offset, val;
5630 bfd_byte *hit_addr;
5631 unsigned long t0;
5632 unsigned char sym_type;
5633
5634 switch (r_type)
5635 {
5636 case R_PPC_REL24:
5637 case R_PPC_LOCAL24PC:
5638 case R_PPC_PLTREL24:
5639 max_branch_offset = 1 << 25;
5640 break;
5641
5642 case R_PPC_REL14:
5643 case R_PPC_REL14_BRTAKEN:
5644 case R_PPC_REL14_BRNTAKEN:
5645 max_branch_offset = 1 << 15;
5646 break;
5647
5648 default:
5649 continue;
5650 }
5651
5652 /* Get the value of the symbol referred to by the reloc. */
5653 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5654 {
5655 /* A local symbol. */
5656 Elf_Internal_Sym *isym;
5657
5658 /* Read this BFD's local symbols. */
5659 if (isymbuf == NULL)
5660 {
5661 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5662 if (isymbuf == NULL)
5663 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5664 symtab_hdr->sh_info, 0,
5665 NULL, NULL, NULL);
5666 if (isymbuf == 0)
5667 goto error_return;
5668 }
5669 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5670 if (isym->st_shndx == SHN_UNDEF)
5671 continue; /* We can't do anything with undefined symbols. */
5672 else if (isym->st_shndx == SHN_ABS)
5673 tsec = bfd_abs_section_ptr;
5674 else if (isym->st_shndx == SHN_COMMON)
5675 tsec = bfd_com_section_ptr;
5676 else
5677 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5678
5679 toff = isym->st_value;
5680 sym_type = ELF_ST_TYPE (isym->st_info);
5681 }
5682 else
5683 {
5684 /* Global symbol handling. */
5685 unsigned long indx;
5686 struct elf_link_hash_entry *h;
5687
5688 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5689 h = elf_sym_hashes (abfd)[indx];
5690
5691 while (h->root.type == bfd_link_hash_indirect
5692 || h->root.type == bfd_link_hash_warning)
5693 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5694
5695 tsec = NULL;
5696 toff = 0;
5697 if (r_type == R_PPC_PLTREL24
5698 && htab->plt != NULL)
5699 {
5700 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5701
5702 if (ent != NULL)
5703 {
5704 if (htab->plt_type == PLT_NEW)
5705 {
5706 tsec = htab->glink;
5707 toff = ent->glink_offset;
5708 }
5709 else
5710 {
5711 tsec = htab->plt;
5712 toff = ent->plt.offset;
5713 }
5714 }
5715 }
5716 if (tsec != NULL)
5717 ;
5718 else if (h->root.type == bfd_link_hash_defined
5719 || h->root.type == bfd_link_hash_defweak)
5720 {
5721 tsec = h->root.u.def.section;
5722 toff = h->root.u.def.value;
5723 }
5724 else
5725 continue;
5726
5727 sym_type = h->type;
5728 }
5729
5730 /* If the branch and target are in the same section, you have
5731 no hope of adding stubs. We'll error out later should the
5732 branch overflow. */
5733 if (tsec == isec)
5734 continue;
5735
5736 /* There probably isn't any reason to handle symbols in
5737 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5738 attribute for a code section, and we are only looking at
5739 branches. However, implement it correctly here as a
5740 reference for other target relax_section functions. */
5741 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5742 {
5743 /* At this stage in linking, no SEC_MERGE symbol has been
5744 adjusted, so all references to such symbols need to be
5745 passed through _bfd_merged_section_offset. (Later, in
5746 relocate_section, all SEC_MERGE symbols *except* for
5747 section symbols have been adjusted.)
5748
5749 gas may reduce relocations against symbols in SEC_MERGE
5750 sections to a relocation against the section symbol when
5751 the original addend was zero. When the reloc is against
5752 a section symbol we should include the addend in the
5753 offset passed to _bfd_merged_section_offset, since the
5754 location of interest is the original symbol. On the
5755 other hand, an access to "sym+addend" where "sym" is not
5756 a section symbol should not include the addend; Such an
5757 access is presumed to be an offset from "sym"; The
5758 location of interest is just "sym". */
5759 if (sym_type == STT_SECTION)
5760 toff += irel->r_addend;
5761
5762 toff = _bfd_merged_section_offset (abfd, &tsec,
5763 elf_section_data (tsec)->sec_info,
5764 toff);
5765
5766 if (sym_type != STT_SECTION)
5767 toff += irel->r_addend;
5768 }
5769 /* PLTREL24 addends are special. */
5770 else if (r_type != R_PPC_PLTREL24)
5771 toff += irel->r_addend;
5772
5773 /* Attempted -shared link of non-pic code loses. */
5774 if (tsec->output_section == NULL)
5775 continue;
5776
5777 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5778
5779 roff = irel->r_offset;
5780 reladdr = isec->output_section->vma + isec->output_offset + roff;
5781
5782 /* If the branch is in range, no need to do anything. */
5783 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5784 continue;
5785
5786 /* Look for an existing fixup to this address. */
5787 for (f = fixups; f ; f = f->next)
5788 if (f->tsec == tsec && f->toff == toff)
5789 break;
5790
5791 if (f == NULL)
5792 {
5793 size_t size;
5794 unsigned long stub_rtype;
5795
5796 val = trampoff - roff;
5797 if (val >= max_branch_offset)
5798 /* Oh dear, we can't reach a trampoline. Don't try to add
5799 one. We'll report an error later. */
5800 continue;
5801
5802 if (link_info->shared)
5803 {
5804 size = 4 * ARRAY_SIZE (shared_stub_entry);
5805 insn_offset = 12;
5806 stub_rtype = R_PPC_RELAX32PC;
5807 }
5808 else
5809 {
5810 size = 4 * ARRAY_SIZE (stub_entry);
5811 insn_offset = 0;
5812 stub_rtype = R_PPC_RELAX32;
5813 }
5814
5815 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5816 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5817 abort ();
5818 if (tsec == htab->plt
5819 || tsec == htab->glink)
5820 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5821
5822 /* Hijack the old relocation. Since we need two
5823 relocations for this use a "composite" reloc. */
5824 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5825 stub_rtype);
5826 irel->r_offset = trampoff + insn_offset;
5827 if (r_type == R_PPC_PLTREL24)
5828 irel->r_addend = 0;
5829
5830 /* Record the fixup so we don't do it again this section. */
5831 f = bfd_malloc (sizeof (*f));
5832 f->next = fixups;
5833 f->tsec = tsec;
5834 f->toff = toff;
5835 f->trampoff = trampoff;
5836 fixups = f;
5837
5838 trampoff += size;
5839 changes++;
5840 }
5841 else
5842 {
5843 val = f->trampoff - roff;
5844 if (val >= max_branch_offset)
5845 continue;
5846
5847 /* Nop out the reloc, since we're finalizing things here. */
5848 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5849 }
5850
5851 /* Get the section contents. */
5852 if (contents == NULL)
5853 {
5854 /* Get cached copy if it exists. */
5855 if (elf_section_data (isec)->this_hdr.contents != NULL)
5856 contents = elf_section_data (isec)->this_hdr.contents;
5857 else
5858 {
5859 /* Go get them off disk. */
5860 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5861 goto error_return;
5862 }
5863 }
5864
5865 /* Fix up the existing branch to hit the trampoline. */
5866 hit_addr = contents + roff;
5867 switch (r_type)
5868 {
5869 case R_PPC_REL24:
5870 case R_PPC_LOCAL24PC:
5871 case R_PPC_PLTREL24:
5872 t0 = bfd_get_32 (abfd, hit_addr);
5873 t0 &= ~0x3fffffc;
5874 t0 |= val & 0x3fffffc;
5875 bfd_put_32 (abfd, t0, hit_addr);
5876 break;
5877
5878 case R_PPC_REL14:
5879 case R_PPC_REL14_BRTAKEN:
5880 case R_PPC_REL14_BRNTAKEN:
5881 t0 = bfd_get_32 (abfd, hit_addr);
5882 t0 &= ~0xfffc;
5883 t0 |= val & 0xfffc;
5884 bfd_put_32 (abfd, t0, hit_addr);
5885 break;
5886 }
5887 }
5888
5889 /* Write out the trampolines. */
5890 if (fixups != NULL)
5891 {
5892 const int *stub;
5893 bfd_byte *dest;
5894 bfd_vma val;
5895 int i, size;
5896
5897 do
5898 {
5899 struct one_fixup *f = fixups;
5900 fixups = fixups->next;
5901 free (f);
5902 }
5903 while (fixups);
5904
5905 contents = bfd_realloc_or_free (contents, trampoff);
5906 if (contents == NULL)
5907 goto error_return;
5908
5909 isec->size = (isec->size + 3) & (bfd_vma) -4;
5910 /* Branch around the trampolines. */
5911 val = B + trampoff - isec->size;
5912 dest = contents + isec->size;
5913 isec->size = trampoff;
5914 bfd_put_32 (abfd, val, dest);
5915 dest += 4;
5916
5917 if (link_info->shared)
5918 {
5919 stub = shared_stub_entry;
5920 size = ARRAY_SIZE (shared_stub_entry);
5921 }
5922 else
5923 {
5924 stub = stub_entry;
5925 size = ARRAY_SIZE (stub_entry);
5926 }
5927
5928 i = 0;
5929 while (dest < contents + trampoff)
5930 {
5931 bfd_put_32 (abfd, stub[i], dest);
5932 i++;
5933 if (i == size)
5934 i = 0;
5935 dest += 4;
5936 }
5937 BFD_ASSERT (i == 0);
5938 }
5939
5940 if (isymbuf != NULL
5941 && symtab_hdr->contents != (unsigned char *) isymbuf)
5942 {
5943 if (! link_info->keep_memory)
5944 free (isymbuf);
5945 else
5946 {
5947 /* Cache the symbols for elf_link_input_bfd. */
5948 symtab_hdr->contents = (unsigned char *) isymbuf;
5949 }
5950 }
5951
5952 if (contents != NULL
5953 && elf_section_data (isec)->this_hdr.contents != contents)
5954 {
5955 if (!changes && !link_info->keep_memory)
5956 free (contents);
5957 else
5958 {
5959 /* Cache the section contents for elf_link_input_bfd. */
5960 elf_section_data (isec)->this_hdr.contents = contents;
5961 }
5962 }
5963
5964 if (changes != 0)
5965 {
5966 /* Append sufficient NOP relocs so we can write out relocation
5967 information for the trampolines. */
5968 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
5969 * sizeof (*new_relocs));
5970 unsigned ix;
5971
5972 if (!new_relocs)
5973 goto error_return;
5974 memcpy (new_relocs, internal_relocs,
5975 isec->reloc_count * sizeof (*new_relocs));
5976 for (ix = changes; ix--;)
5977 {
5978 irel = new_relocs + ix + isec->reloc_count;
5979
5980 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5981 }
5982 if (internal_relocs != elf_section_data (isec)->relocs)
5983 free (internal_relocs);
5984 elf_section_data (isec)->relocs = new_relocs;
5985 isec->reloc_count += changes;
5986 elf_section_data (isec)->rel_hdr.sh_size
5987 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
5988 }
5989 else if (elf_section_data (isec)->relocs != internal_relocs)
5990 free (internal_relocs);
5991
5992 *again = changes != 0;
5993 return TRUE;
5994
5995 error_return:
5996 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5997 free (isymbuf);
5998 if (contents != NULL
5999 && elf_section_data (isec)->this_hdr.contents != contents)
6000 free (contents);
6001 if (internal_relocs != NULL
6002 && elf_section_data (isec)->relocs != internal_relocs)
6003 free (internal_relocs);
6004 return FALSE;
6005 }
6006 \f
6007 /* What to do when ld finds relocations against symbols defined in
6008 discarded sections. */
6009
6010 static unsigned int
6011 ppc_elf_action_discarded (asection *sec)
6012 {
6013 if (strcmp (".fixup", sec->name) == 0)
6014 return 0;
6015
6016 if (strcmp (".got2", sec->name) == 0)
6017 return 0;
6018
6019 return _bfd_elf_default_action_discarded (sec);
6020 }
6021 \f
6022 /* Fill in the address for a pointer generated in a linker section. */
6023
6024 static bfd_vma
6025 elf_finish_pointer_linker_section (bfd *input_bfd,
6026 elf_linker_section_t *lsect,
6027 struct elf_link_hash_entry *h,
6028 bfd_vma relocation,
6029 const Elf_Internal_Rela *rel)
6030 {
6031 elf_linker_section_pointers_t *linker_section_ptr;
6032
6033 BFD_ASSERT (lsect != NULL);
6034
6035 if (h != NULL)
6036 {
6037 /* Handle global symbol. */
6038 struct ppc_elf_link_hash_entry *eh;
6039
6040 eh = (struct ppc_elf_link_hash_entry *) h;
6041 BFD_ASSERT (eh->elf.def_regular);
6042 linker_section_ptr = eh->linker_section_pointer;
6043 }
6044 else
6045 {
6046 /* Handle local symbol. */
6047 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6048
6049 BFD_ASSERT (is_ppc_elf (input_bfd));
6050 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6051 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6052 }
6053
6054 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6055 rel->r_addend,
6056 lsect);
6057 BFD_ASSERT (linker_section_ptr != NULL);
6058
6059 /* Offset will always be a multiple of four, so use the bottom bit
6060 as a "written" flag. */
6061 if ((linker_section_ptr->offset & 1) == 0)
6062 {
6063 bfd_put_32 (lsect->section->owner,
6064 relocation + linker_section_ptr->addend,
6065 lsect->section->contents + linker_section_ptr->offset);
6066 linker_section_ptr->offset += 1;
6067 }
6068
6069 relocation = (lsect->section->output_offset
6070 + linker_section_ptr->offset - 1
6071 - 0x8000);
6072
6073 #ifdef DEBUG
6074 fprintf (stderr,
6075 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6076 lsect->name, (long) relocation, (long) relocation);
6077 #endif
6078
6079 /* Subtract out the addend, because it will get added back in by the normal
6080 processing. */
6081 return relocation - linker_section_ptr->addend;
6082 }
6083
6084 /* The RELOCATE_SECTION function is called by the ELF backend linker
6085 to handle the relocations for a section.
6086
6087 The relocs are always passed as Rela structures; if the section
6088 actually uses Rel structures, the r_addend field will always be
6089 zero.
6090
6091 This function is responsible for adjust the section contents as
6092 necessary, and (if using Rela relocs and generating a
6093 relocatable output file) adjusting the reloc addend as
6094 necessary.
6095
6096 This function does not have to worry about setting the reloc
6097 address or the reloc symbol index.
6098
6099 LOCAL_SYMS is a pointer to the swapped in local symbols.
6100
6101 LOCAL_SECTIONS is an array giving the section in the input file
6102 corresponding to the st_shndx field of each local symbol.
6103
6104 The global hash table entry for the global symbols can be found
6105 via elf_sym_hashes (input_bfd).
6106
6107 When generating relocatable output, this function must handle
6108 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6109 going to be the section symbol corresponding to the output
6110 section, which means that the addend must be adjusted
6111 accordingly. */
6112
6113 static bfd_boolean
6114 ppc_elf_relocate_section (bfd *output_bfd,
6115 struct bfd_link_info *info,
6116 bfd *input_bfd,
6117 asection *input_section,
6118 bfd_byte *contents,
6119 Elf_Internal_Rela *relocs,
6120 Elf_Internal_Sym *local_syms,
6121 asection **local_sections)
6122 {
6123 Elf_Internal_Shdr *symtab_hdr;
6124 struct elf_link_hash_entry **sym_hashes;
6125 struct ppc_elf_link_hash_table *htab;
6126 Elf_Internal_Rela *rel;
6127 Elf_Internal_Rela *relend;
6128 Elf_Internal_Rela outrel;
6129 bfd_byte *loc;
6130 asection *got2, *sreloc = NULL;
6131 bfd_vma *local_got_offsets;
6132 bfd_boolean ret = TRUE;
6133 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6134 bfd_boolean is_vxworks_tls;
6135
6136 #ifdef DEBUG
6137 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6138 "%ld relocations%s",
6139 input_bfd, input_section,
6140 (long) input_section->reloc_count,
6141 (info->relocatable) ? " (relocatable)" : "");
6142 #endif
6143
6144 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6145
6146 /* Initialize howto table if not already done. */
6147 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6148 ppc_elf_howto_init ();
6149
6150 htab = ppc_elf_hash_table (info);
6151 local_got_offsets = elf_local_got_offsets (input_bfd);
6152 symtab_hdr = &elf_symtab_hdr (input_bfd);
6153 sym_hashes = elf_sym_hashes (input_bfd);
6154 /* We have to handle relocations in vxworks .tls_vars sections
6155 specially, because the dynamic loader is 'weird'. */
6156 is_vxworks_tls = (htab->is_vxworks && info->shared
6157 && !strcmp (input_section->output_section->name,
6158 ".tls_vars"));
6159 rel = relocs;
6160 relend = relocs + input_section->reloc_count;
6161 for (; rel < relend; rel++)
6162 {
6163 enum elf_ppc_reloc_type r_type;
6164 bfd_vma addend;
6165 bfd_reloc_status_type r;
6166 Elf_Internal_Sym *sym;
6167 asection *sec;
6168 struct elf_link_hash_entry *h;
6169 const char *sym_name;
6170 reloc_howto_type *howto;
6171 unsigned long r_symndx;
6172 bfd_vma relocation;
6173 bfd_vma branch_bit, insn, from;
6174 bfd_boolean unresolved_reloc;
6175 bfd_boolean warned;
6176 unsigned int tls_type, tls_mask, tls_gd;
6177
6178 r_type = ELF32_R_TYPE (rel->r_info);
6179 sym = NULL;
6180 sec = NULL;
6181 h = NULL;
6182 unresolved_reloc = FALSE;
6183 warned = FALSE;
6184 r_symndx = ELF32_R_SYM (rel->r_info);
6185
6186 if (r_symndx < symtab_hdr->sh_info)
6187 {
6188 sym = local_syms + r_symndx;
6189 sec = local_sections[r_symndx];
6190 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6191
6192 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6193 }
6194 else
6195 {
6196 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6197 r_symndx, symtab_hdr, sym_hashes,
6198 h, sec, relocation,
6199 unresolved_reloc, warned);
6200
6201 sym_name = h->root.root.string;
6202 }
6203
6204 if (sec != NULL && elf_discarded_section (sec))
6205 {
6206 /* For relocs against symbols from removed linkonce sections,
6207 or sections discarded by a linker script, we just want the
6208 section contents zeroed. Avoid any special processing. */
6209 howto = NULL;
6210 if (r_type < R_PPC_max)
6211 howto = ppc_elf_howto_table[r_type];
6212 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6213 rel->r_info = 0;
6214 rel->r_addend = 0;
6215 continue;
6216 }
6217
6218 if (info->relocatable)
6219 {
6220 if (got2 != NULL
6221 && r_type == R_PPC_PLTREL24
6222 && rel->r_addend >= 32768)
6223 {
6224 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6225 addend specifies the GOT pointer offset within .got2. */
6226 rel->r_addend += got2->output_offset;
6227 }
6228 continue;
6229 }
6230
6231 /* TLS optimizations. Replace instruction sequences and relocs
6232 based on information we collected in tls_optimize. We edit
6233 RELOCS so that --emit-relocs will output something sensible
6234 for the final instruction stream. */
6235 tls_mask = 0;
6236 tls_gd = 0;
6237 if (IS_PPC_TLS_RELOC (r_type))
6238 {
6239 if (h != NULL)
6240 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6241 else if (local_got_offsets != NULL)
6242 {
6243 char *lgot_masks;
6244 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6245 tls_mask = lgot_masks[r_symndx];
6246 }
6247 }
6248
6249 /* Ensure reloc mapping code below stays sane. */
6250 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6251 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6252 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6253 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6254 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6255 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6256 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6257 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6258 abort ();
6259 switch (r_type)
6260 {
6261 default:
6262 break;
6263
6264 case R_PPC_GOT_TPREL16:
6265 case R_PPC_GOT_TPREL16_LO:
6266 if (tls_mask != 0
6267 && (tls_mask & TLS_TPREL) == 0)
6268 {
6269 bfd_vma insn;
6270 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6271 insn &= 31 << 21;
6272 insn |= 0x3c020000; /* addis 0,2,0 */
6273 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6274 r_type = R_PPC_TPREL16_HA;
6275 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6276 }
6277 break;
6278
6279 case R_PPC_TLS:
6280 if (tls_mask != 0
6281 && (tls_mask & TLS_TPREL) == 0)
6282 {
6283 bfd_vma insn, rtra;
6284 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6285 if ((insn & ((31 << 26) | (31 << 11)))
6286 == ((31 << 26) | (2 << 11)))
6287 rtra = insn & ((1 << 26) - (1 << 16));
6288 else if ((insn & ((31 << 26) | (31 << 16)))
6289 == ((31 << 26) | (2 << 16)))
6290 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6291 else
6292 abort ();
6293 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6294 /* add -> addi. */
6295 insn = 14 << 26;
6296 else if ((insn & (31 << 1)) == 23 << 1
6297 && ((insn & (31 << 6)) < 14 << 6
6298 || ((insn & (31 << 6)) >= 16 << 6
6299 && (insn & (31 << 6)) < 24 << 6)))
6300 /* load and store indexed -> dform. */
6301 insn = (32 | ((insn >> 6) & 31)) << 26;
6302 else if ((insn & (31 << 1)) == 21 << 1
6303 && (insn & (0x1a << 6)) == 0)
6304 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6305 insn = (((58 | ((insn >> 6) & 4)) << 26)
6306 | ((insn >> 6) & 1));
6307 else if ((insn & (31 << 1)) == 21 << 1
6308 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6309 /* lwax -> lwa. */
6310 insn = (58 << 26) | 2;
6311 else
6312 abort ();
6313 insn |= rtra;
6314 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6315 r_type = R_PPC_TPREL16_LO;
6316 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6317
6318 /* Was PPC_TLS which sits on insn boundary, now
6319 PPC_TPREL16_LO which is at low-order half-word. */
6320 rel->r_offset += d_offset;
6321 }
6322 break;
6323
6324 case R_PPC_GOT_TLSGD16_HI:
6325 case R_PPC_GOT_TLSGD16_HA:
6326 tls_gd = TLS_TPRELGD;
6327 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6328 goto tls_gdld_hi;
6329 break;
6330
6331 case R_PPC_GOT_TLSLD16_HI:
6332 case R_PPC_GOT_TLSLD16_HA:
6333 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6334 {
6335 tls_gdld_hi:
6336 if ((tls_mask & tls_gd) != 0)
6337 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6338 + R_PPC_GOT_TPREL16);
6339 else
6340 {
6341 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6342 rel->r_offset -= d_offset;
6343 r_type = R_PPC_NONE;
6344 }
6345 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6346 }
6347 break;
6348
6349 case R_PPC_GOT_TLSGD16:
6350 case R_PPC_GOT_TLSGD16_LO:
6351 tls_gd = TLS_TPRELGD;
6352 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6353 goto tls_ldgd_opt;
6354 break;
6355
6356 case R_PPC_GOT_TLSLD16:
6357 case R_PPC_GOT_TLSLD16_LO:
6358 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6359 {
6360 unsigned int insn1, insn2;
6361 bfd_vma offset;
6362
6363 tls_ldgd_opt:
6364 offset = rel[1].r_offset;
6365 if ((tls_mask & tls_gd) != 0)
6366 {
6367 /* IE */
6368 insn1 = bfd_get_32 (output_bfd,
6369 contents + rel->r_offset - d_offset);
6370 insn1 &= (1 << 26) - 1;
6371 insn1 |= 32 << 26; /* lwz */
6372 insn2 = 0x7c631214; /* add 3,3,2 */
6373 rel[1].r_info
6374 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6375 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6376 + R_PPC_GOT_TPREL16);
6377 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6378 }
6379 else
6380 {
6381 /* LE */
6382 insn1 = 0x3c620000; /* addis 3,2,0 */
6383 insn2 = 0x38630000; /* addi 3,3,0 */
6384 if (tls_gd == 0)
6385 {
6386 /* Was an LD reloc. */
6387 for (r_symndx = 0;
6388 r_symndx < symtab_hdr->sh_info;
6389 r_symndx++)
6390 if (local_sections[r_symndx] == sec)
6391 break;
6392 if (r_symndx >= symtab_hdr->sh_info)
6393 r_symndx = 0;
6394 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6395 if (r_symndx != 0)
6396 rel->r_addend -= (local_syms[r_symndx].st_value
6397 + sec->output_offset
6398 + sec->output_section->vma);
6399 }
6400 r_type = R_PPC_TPREL16_HA;
6401 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6402 rel[1].r_info = ELF32_R_INFO (r_symndx,
6403 R_PPC_TPREL16_LO);
6404 rel[1].r_offset += d_offset;
6405 rel[1].r_addend = rel->r_addend;
6406 }
6407 bfd_put_32 (output_bfd, insn1,
6408 contents + rel->r_offset - d_offset);
6409 bfd_put_32 (output_bfd, insn2, contents + offset);
6410 if (tls_gd == 0)
6411 {
6412 /* We changed the symbol on an LD reloc. Start over
6413 in order to get h, sym, sec etc. right. */
6414 rel--;
6415 continue;
6416 }
6417 }
6418 break;
6419 }
6420
6421 /* Handle other relocations that tweak non-addend part of insn. */
6422 branch_bit = 0;
6423 switch (r_type)
6424 {
6425 default:
6426 break;
6427
6428 /* Branch taken prediction relocations. */
6429 case R_PPC_ADDR14_BRTAKEN:
6430 case R_PPC_REL14_BRTAKEN:
6431 branch_bit = BRANCH_PREDICT_BIT;
6432 /* Fall thru */
6433
6434 /* Branch not taken prediction relocations. */
6435 case R_PPC_ADDR14_BRNTAKEN:
6436 case R_PPC_REL14_BRNTAKEN:
6437 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6438 insn &= ~BRANCH_PREDICT_BIT;
6439 insn |= branch_bit;
6440
6441 from = (rel->r_offset
6442 + input_section->output_offset
6443 + input_section->output_section->vma);
6444
6445 /* Invert 'y' bit if not the default. */
6446 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6447 insn ^= BRANCH_PREDICT_BIT;
6448
6449 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6450 break;
6451 }
6452
6453 addend = rel->r_addend;
6454 tls_type = 0;
6455 howto = NULL;
6456 if (r_type < R_PPC_max)
6457 howto = ppc_elf_howto_table[r_type];
6458 switch (r_type)
6459 {
6460 default:
6461 (*_bfd_error_handler)
6462 (_("%B: unknown relocation type %d for symbol %s"),
6463 input_bfd, (int) r_type, sym_name);
6464
6465 bfd_set_error (bfd_error_bad_value);
6466 ret = FALSE;
6467 continue;
6468
6469 case R_PPC_NONE:
6470 case R_PPC_TLS:
6471 case R_PPC_EMB_MRKREF:
6472 case R_PPC_GNU_VTINHERIT:
6473 case R_PPC_GNU_VTENTRY:
6474 continue;
6475
6476 /* GOT16 relocations. Like an ADDR16 using the symbol's
6477 address in the GOT as relocation value instead of the
6478 symbol's value itself. Also, create a GOT entry for the
6479 symbol and put the symbol value there. */
6480 case R_PPC_GOT_TLSGD16:
6481 case R_PPC_GOT_TLSGD16_LO:
6482 case R_PPC_GOT_TLSGD16_HI:
6483 case R_PPC_GOT_TLSGD16_HA:
6484 tls_type = TLS_TLS | TLS_GD;
6485 goto dogot;
6486
6487 case R_PPC_GOT_TLSLD16:
6488 case R_PPC_GOT_TLSLD16_LO:
6489 case R_PPC_GOT_TLSLD16_HI:
6490 case R_PPC_GOT_TLSLD16_HA:
6491 tls_type = TLS_TLS | TLS_LD;
6492 goto dogot;
6493
6494 case R_PPC_GOT_TPREL16:
6495 case R_PPC_GOT_TPREL16_LO:
6496 case R_PPC_GOT_TPREL16_HI:
6497 case R_PPC_GOT_TPREL16_HA:
6498 tls_type = TLS_TLS | TLS_TPREL;
6499 goto dogot;
6500
6501 case R_PPC_GOT_DTPREL16:
6502 case R_PPC_GOT_DTPREL16_LO:
6503 case R_PPC_GOT_DTPREL16_HI:
6504 case R_PPC_GOT_DTPREL16_HA:
6505 tls_type = TLS_TLS | TLS_DTPREL;
6506 goto dogot;
6507
6508 case R_PPC_GOT16:
6509 case R_PPC_GOT16_LO:
6510 case R_PPC_GOT16_HI:
6511 case R_PPC_GOT16_HA:
6512 dogot:
6513 {
6514 /* Relocation is to the entry for this symbol in the global
6515 offset table. */
6516 bfd_vma off;
6517 bfd_vma *offp;
6518 unsigned long indx;
6519
6520 if (htab->got == NULL)
6521 abort ();
6522
6523 indx = 0;
6524 if (tls_type == (TLS_TLS | TLS_LD)
6525 && (h == NULL
6526 || !h->def_dynamic))
6527 offp = &htab->tlsld_got.offset;
6528 else if (h != NULL)
6529 {
6530 bfd_boolean dyn;
6531 dyn = htab->elf.dynamic_sections_created;
6532 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6533 || (info->shared
6534 && SYMBOL_REFERENCES_LOCAL (info, h)))
6535 /* This is actually a static link, or it is a
6536 -Bsymbolic link and the symbol is defined
6537 locally, or the symbol was forced to be local
6538 because of a version file. */
6539 ;
6540 else
6541 {
6542 indx = h->dynindx;
6543 unresolved_reloc = FALSE;
6544 }
6545 offp = &h->got.offset;
6546 }
6547 else
6548 {
6549 if (local_got_offsets == NULL)
6550 abort ();
6551 offp = &local_got_offsets[r_symndx];
6552 }
6553
6554 /* The offset must always be a multiple of 4. We use the
6555 least significant bit to record whether we have already
6556 processed this entry. */
6557 off = *offp;
6558 if ((off & 1) != 0)
6559 off &= ~1;
6560 else
6561 {
6562 unsigned int tls_m = (tls_mask
6563 & (TLS_LD | TLS_GD | TLS_DTPREL
6564 | TLS_TPREL | TLS_TPRELGD));
6565
6566 if (offp == &htab->tlsld_got.offset)
6567 tls_m = TLS_LD;
6568 else if (h == NULL
6569 || !h->def_dynamic)
6570 tls_m &= ~TLS_LD;
6571
6572 /* We might have multiple got entries for this sym.
6573 Initialize them all. */
6574 do
6575 {
6576 int tls_ty = 0;
6577
6578 if ((tls_m & TLS_LD) != 0)
6579 {
6580 tls_ty = TLS_TLS | TLS_LD;
6581 tls_m &= ~TLS_LD;
6582 }
6583 else if ((tls_m & TLS_GD) != 0)
6584 {
6585 tls_ty = TLS_TLS | TLS_GD;
6586 tls_m &= ~TLS_GD;
6587 }
6588 else if ((tls_m & TLS_DTPREL) != 0)
6589 {
6590 tls_ty = TLS_TLS | TLS_DTPREL;
6591 tls_m &= ~TLS_DTPREL;
6592 }
6593 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6594 {
6595 tls_ty = TLS_TLS | TLS_TPREL;
6596 tls_m = 0;
6597 }
6598
6599 /* Generate relocs for the dynamic linker. */
6600 if ((info->shared || indx != 0)
6601 && (offp == &htab->tlsld_got.offset
6602 || h == NULL
6603 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6604 || h->root.type != bfd_link_hash_undefweak))
6605 {
6606 outrel.r_offset = (htab->got->output_section->vma
6607 + htab->got->output_offset
6608 + off);
6609 outrel.r_addend = 0;
6610 if (tls_ty & (TLS_LD | TLS_GD))
6611 {
6612 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6613 if (tls_ty == (TLS_TLS | TLS_GD))
6614 {
6615 loc = htab->relgot->contents;
6616 loc += (htab->relgot->reloc_count++
6617 * sizeof (Elf32_External_Rela));
6618 bfd_elf32_swap_reloca_out (output_bfd,
6619 &outrel, loc);
6620 outrel.r_offset += 4;
6621 outrel.r_info
6622 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6623 }
6624 }
6625 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6626 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6627 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6628 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6629 else if (indx == 0)
6630 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6631 else
6632 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6633 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
6634 {
6635 outrel.r_addend += relocation;
6636 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6637 outrel.r_addend -= htab->elf.tls_sec->vma;
6638 }
6639 loc = htab->relgot->contents;
6640 loc += (htab->relgot->reloc_count++
6641 * sizeof (Elf32_External_Rela));
6642 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6643 }
6644
6645 /* Init the .got section contents if we're not
6646 emitting a reloc. */
6647 else
6648 {
6649 bfd_vma value = relocation;
6650
6651 if (tls_ty == (TLS_TLS | TLS_LD))
6652 value = 1;
6653 else if (tls_ty != 0)
6654 {
6655 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6656 if (tls_ty == (TLS_TLS | TLS_TPREL))
6657 value += DTP_OFFSET - TP_OFFSET;
6658
6659 if (tls_ty == (TLS_TLS | TLS_GD))
6660 {
6661 bfd_put_32 (output_bfd, value,
6662 htab->got->contents + off + 4);
6663 value = 1;
6664 }
6665 }
6666 bfd_put_32 (output_bfd, value,
6667 htab->got->contents + off);
6668 }
6669
6670 off += 4;
6671 if (tls_ty & (TLS_LD | TLS_GD))
6672 off += 4;
6673 }
6674 while (tls_m != 0);
6675
6676 off = *offp;
6677 *offp = off | 1;
6678 }
6679
6680 if (off >= (bfd_vma) -2)
6681 abort ();
6682
6683 if ((tls_type & TLS_TLS) != 0)
6684 {
6685 if (tls_type != (TLS_TLS | TLS_LD))
6686 {
6687 if ((tls_mask & TLS_LD) != 0
6688 && !(h == NULL
6689 || !h->def_dynamic))
6690 off += 8;
6691 if (tls_type != (TLS_TLS | TLS_GD))
6692 {
6693 if ((tls_mask & TLS_GD) != 0)
6694 off += 8;
6695 if (tls_type != (TLS_TLS | TLS_DTPREL))
6696 {
6697 if ((tls_mask & TLS_DTPREL) != 0)
6698 off += 4;
6699 }
6700 }
6701 }
6702 }
6703
6704 relocation = (htab->got->output_section->vma
6705 + htab->got->output_offset
6706 + off
6707 - SYM_VAL (htab->elf.hgot));
6708
6709 /* Addends on got relocations don't make much sense.
6710 x+off@got is actually x@got+off, and since the got is
6711 generated by a hash table traversal, the value in the
6712 got at entry m+n bears little relation to the entry m. */
6713 if (addend != 0)
6714 (*_bfd_error_handler)
6715 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6716 input_bfd,
6717 input_section,
6718 (long) rel->r_offset,
6719 howto->name,
6720 sym_name);
6721 }
6722 break;
6723
6724 /* Relocations that need no special processing. */
6725 case R_PPC_LOCAL24PC:
6726 /* It makes no sense to point a local relocation
6727 at a symbol not in this object. */
6728 if (unresolved_reloc)
6729 {
6730 if (! (*info->callbacks->undefined_symbol) (info,
6731 h->root.root.string,
6732 input_bfd,
6733 input_section,
6734 rel->r_offset,
6735 TRUE))
6736 return FALSE;
6737 continue;
6738 }
6739 break;
6740
6741 case R_PPC_DTPREL16:
6742 case R_PPC_DTPREL16_LO:
6743 case R_PPC_DTPREL16_HI:
6744 case R_PPC_DTPREL16_HA:
6745 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6746 break;
6747
6748 /* Relocations that may need to be propagated if this is a shared
6749 object. */
6750 case R_PPC_TPREL16:
6751 case R_PPC_TPREL16_LO:
6752 case R_PPC_TPREL16_HI:
6753 case R_PPC_TPREL16_HA:
6754 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6755 /* The TPREL16 relocs shouldn't really be used in shared
6756 libs as they will result in DT_TEXTREL being set, but
6757 support them anyway. */
6758 goto dodyn;
6759
6760 case R_PPC_TPREL32:
6761 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6762 goto dodyn;
6763
6764 case R_PPC_DTPREL32:
6765 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6766 goto dodyn;
6767
6768 case R_PPC_DTPMOD32:
6769 relocation = 1;
6770 addend = 0;
6771 goto dodyn;
6772
6773 case R_PPC_REL16:
6774 case R_PPC_REL16_LO:
6775 case R_PPC_REL16_HI:
6776 case R_PPC_REL16_HA:
6777 break;
6778
6779 case R_PPC_REL32:
6780 if (h == NULL || h == htab->elf.hgot)
6781 break;
6782 /* fall through */
6783
6784 case R_PPC_ADDR32:
6785 case R_PPC_ADDR16:
6786 case R_PPC_ADDR16_LO:
6787 case R_PPC_ADDR16_HI:
6788 case R_PPC_ADDR16_HA:
6789 case R_PPC_UADDR32:
6790 case R_PPC_UADDR16:
6791 goto dodyn;
6792
6793 case R_PPC_REL24:
6794 case R_PPC_REL14:
6795 case R_PPC_REL14_BRTAKEN:
6796 case R_PPC_REL14_BRNTAKEN:
6797 /* If these relocations are not to a named symbol, they can be
6798 handled right here, no need to bother the dynamic linker. */
6799 if (SYMBOL_CALLS_LOCAL (info, h)
6800 || h == htab->elf.hgot)
6801 break;
6802 /* fall through */
6803
6804 case R_PPC_ADDR24:
6805 case R_PPC_ADDR14:
6806 case R_PPC_ADDR14_BRTAKEN:
6807 case R_PPC_ADDR14_BRNTAKEN:
6808 if (h != NULL && !info->shared)
6809 break;
6810 /* fall through */
6811
6812 dodyn:
6813 if ((input_section->flags & SEC_ALLOC) == 0
6814 || is_vxworks_tls)
6815 break;
6816
6817 if ((info->shared
6818 && !(h != NULL
6819 && ((h->root.type == bfd_link_hash_undefined
6820 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6821 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6822 || (h->root.type == bfd_link_hash_undefweak
6823 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6824 && (must_be_dyn_reloc (info, r_type)
6825 || !SYMBOL_CALLS_LOCAL (info, h)))
6826 || (ELIMINATE_COPY_RELOCS
6827 && !info->shared
6828 && h != NULL
6829 && h->dynindx != -1
6830 && !h->non_got_ref
6831 && !h->def_regular))
6832 {
6833 int skip;
6834
6835 #ifdef DEBUG
6836 fprintf (stderr, "ppc_elf_relocate_section needs to "
6837 "create relocation for %s\n",
6838 (h && h->root.root.string
6839 ? h->root.root.string : "<unknown>"));
6840 #endif
6841
6842 /* When generating a shared object, these relocations
6843 are copied into the output file to be resolved at run
6844 time. */
6845 if (sreloc == NULL)
6846 {
6847 sreloc = _bfd_elf_get_dynamic_reloc_section
6848 (input_bfd, input_section, /*rela?*/ TRUE);
6849 if (sreloc == NULL)
6850 return FALSE;
6851 }
6852
6853 skip = 0;
6854 outrel.r_offset =
6855 _bfd_elf_section_offset (output_bfd, info, input_section,
6856 rel->r_offset);
6857 if (outrel.r_offset == (bfd_vma) -1
6858 || outrel.r_offset == (bfd_vma) -2)
6859 skip = (int) outrel.r_offset;
6860 outrel.r_offset += (input_section->output_section->vma
6861 + input_section->output_offset);
6862
6863 if (skip)
6864 memset (&outrel, 0, sizeof outrel);
6865 else if ((h != NULL
6866 && (h->root.type == bfd_link_hash_undefined
6867 || h->root.type == bfd_link_hash_undefweak))
6868 || !SYMBOL_REFERENCES_LOCAL (info, h))
6869 {
6870 unresolved_reloc = FALSE;
6871 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6872 outrel.r_addend = rel->r_addend;
6873 }
6874 else
6875 {
6876 outrel.r_addend = relocation + rel->r_addend;
6877
6878 if (r_type == R_PPC_ADDR32)
6879 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6880 else
6881 {
6882 long indx = 0;
6883
6884 if (r_symndx == 0 || bfd_is_abs_section (sec))
6885 ;
6886 else if (sec == NULL || sec->owner == NULL)
6887 {
6888 bfd_set_error (bfd_error_bad_value);
6889 ret = FALSE;
6890 }
6891 else
6892 {
6893 asection *osec;
6894
6895 /* We are turning this relocation into one
6896 against a section symbol. It would be
6897 proper to subtract the symbol's value,
6898 osec->vma, from the emitted reloc addend,
6899 but ld.so expects buggy relocs. */
6900 osec = sec->output_section;
6901 indx = elf_section_data (osec)->dynindx;
6902 if (indx == 0)
6903 {
6904 osec = htab->elf.text_index_section;
6905 indx = elf_section_data (osec)->dynindx;
6906 }
6907 BFD_ASSERT (indx != 0);
6908 #ifdef DEBUG
6909 if (indx == 0)
6910 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6911 indx, osec->name, osec->flags,
6912 h->root.root.string);
6913 #endif
6914 }
6915
6916 outrel.r_info = ELF32_R_INFO (indx, r_type);
6917 }
6918 }
6919
6920 loc = sreloc->contents;
6921 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6922 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6923
6924 if (skip == -1)
6925 continue;
6926
6927 /* This reloc will be computed at runtime. We clear the memory
6928 so that it contains predictable value. */
6929 if (! skip
6930 && ((input_section->flags & SEC_ALLOC) != 0
6931 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6932 {
6933 relocation = howto->pc_relative ? outrel.r_offset : 0;
6934 addend = 0;
6935 break;
6936 }
6937 }
6938 break;
6939
6940 case R_PPC_RELAX32PC_PLT:
6941 case R_PPC_RELAX32_PLT:
6942 {
6943 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6944
6945 if (htab->plt_type == PLT_NEW)
6946 relocation = (htab->glink->output_section->vma
6947 + htab->glink->output_offset
6948 + ent->glink_offset);
6949 else
6950 relocation = (htab->plt->output_section->vma
6951 + htab->plt->output_offset
6952 + ent->plt.offset);
6953 }
6954 if (r_type == R_PPC_RELAX32_PLT)
6955 goto relax32;
6956 /* Fall thru */
6957
6958 case R_PPC_RELAX32PC:
6959 relocation -= (input_section->output_section->vma
6960 + input_section->output_offset
6961 + rel->r_offset - 4);
6962 /* Fall thru */
6963
6964 case R_PPC_RELAX32:
6965 relax32:
6966 {
6967 unsigned long t0;
6968 unsigned long t1;
6969
6970 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6971 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6972
6973 /* We're clearing the bits for R_PPC_ADDR16_HA
6974 and R_PPC_ADDR16_LO here. */
6975 t0 &= ~0xffff;
6976 t1 &= ~0xffff;
6977
6978 /* t0 is HA, t1 is LO */
6979 relocation += addend;
6980 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6981 t1 |= relocation & 0xffff;
6982
6983 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6984 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6985
6986 /* Rewrite the reloc and convert one of the trailing nop
6987 relocs to describe this relocation. */
6988 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
6989 /* The relocs are at the bottom 2 bytes */
6990 rel[0].r_offset += 2;
6991 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
6992 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6993 rel[1].r_offset += 4;
6994 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6995 rel++;
6996 }
6997 continue;
6998
6999 /* Indirect .sdata relocation. */
7000 case R_PPC_EMB_SDAI16:
7001 BFD_ASSERT (htab->sdata[0].section != NULL);
7002 relocation
7003 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7004 h, relocation, rel);
7005 break;
7006
7007 /* Indirect .sdata2 relocation. */
7008 case R_PPC_EMB_SDA2I16:
7009 BFD_ASSERT (htab->sdata[1].section != NULL);
7010 relocation
7011 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7012 h, relocation, rel);
7013 break;
7014
7015 /* Handle the TOC16 reloc. We want to use the offset within the .got
7016 section, not the actual VMA. This is appropriate when generating
7017 an embedded ELF object, for which the .got section acts like the
7018 AIX .toc section. */
7019 case R_PPC_TOC16: /* phony GOT16 relocations */
7020 if (sec == NULL || sec->output_section == NULL)
7021 {
7022 unresolved_reloc = TRUE;
7023 break;
7024 }
7025 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7026 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7027
7028 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7029 break;
7030
7031 case R_PPC_PLTREL24:
7032 /* Relocation is to the entry for this symbol in the
7033 procedure linkage table. */
7034 {
7035 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7036
7037 addend = 0;
7038 if (ent == NULL
7039 || htab->plt == NULL)
7040 {
7041 /* We didn't make a PLT entry for this symbol. This
7042 happens when statically linking PIC code, or when
7043 using -Bsymbolic. */
7044 break;
7045 }
7046
7047 unresolved_reloc = FALSE;
7048 if (htab->plt_type == PLT_NEW)
7049 relocation = (htab->glink->output_section->vma
7050 + htab->glink->output_offset
7051 + ent->glink_offset);
7052 else
7053 relocation = (htab->plt->output_section->vma
7054 + htab->plt->output_offset
7055 + ent->plt.offset);
7056 }
7057 break;
7058
7059 /* Relocate against _SDA_BASE_. */
7060 case R_PPC_SDAREL16:
7061 {
7062 const char *name;
7063
7064 if (sec == NULL || sec->output_section == NULL)
7065 {
7066 unresolved_reloc = TRUE;
7067 break;
7068 }
7069
7070 name = bfd_get_section_name (abfd, sec->output_section);
7071 if (! ((CONST_STRNEQ (name, ".sdata")
7072 && (name[6] == 0 || name[6] == '.'))
7073 || (CONST_STRNEQ (name, ".sbss")
7074 && (name[5] == 0 || name[5] == '.'))))
7075 {
7076 (*_bfd_error_handler)
7077 (_("%B: the target (%s) of a %s relocation is "
7078 "in the wrong output section (%s)"),
7079 input_bfd,
7080 sym_name,
7081 howto->name,
7082 name);
7083 }
7084 addend -= SYM_VAL (htab->sdata[0].sym);
7085 }
7086 break;
7087
7088 /* Relocate against _SDA2_BASE_. */
7089 case R_PPC_EMB_SDA2REL:
7090 {
7091 const char *name;
7092
7093 if (sec == NULL || sec->output_section == NULL)
7094 {
7095 unresolved_reloc = TRUE;
7096 break;
7097 }
7098
7099 name = bfd_get_section_name (abfd, sec->output_section);
7100 if (! (CONST_STRNEQ (name, ".sdata2")
7101 || CONST_STRNEQ (name, ".sbss2")))
7102 {
7103 (*_bfd_error_handler)
7104 (_("%B: the target (%s) of a %s relocation is "
7105 "in the wrong output section (%s)"),
7106 input_bfd,
7107 sym_name,
7108 howto->name,
7109 name);
7110
7111 bfd_set_error (bfd_error_bad_value);
7112 ret = FALSE;
7113 continue;
7114 }
7115 addend -= SYM_VAL (htab->sdata[1].sym);
7116 }
7117 break;
7118
7119 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7120 case R_PPC_EMB_SDA21:
7121 case R_PPC_EMB_RELSDA:
7122 {
7123 const char *name;
7124 int reg;
7125
7126 if (sec == NULL || sec->output_section == NULL)
7127 {
7128 unresolved_reloc = TRUE;
7129 break;
7130 }
7131
7132 name = bfd_get_section_name (abfd, sec->output_section);
7133 if (((CONST_STRNEQ (name, ".sdata")
7134 && (name[6] == 0 || name[6] == '.'))
7135 || (CONST_STRNEQ (name, ".sbss")
7136 && (name[5] == 0 || name[5] == '.'))))
7137 {
7138 reg = 13;
7139 addend -= SYM_VAL (htab->sdata[0].sym);
7140 }
7141 else if (CONST_STRNEQ (name, ".sdata2")
7142 || CONST_STRNEQ (name, ".sbss2"))
7143 {
7144 reg = 2;
7145 addend -= SYM_VAL (htab->sdata[1].sym);
7146 }
7147 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7148 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7149 {
7150 reg = 0;
7151 }
7152 else
7153 {
7154 (*_bfd_error_handler)
7155 (_("%B: the target (%s) of a %s relocation is "
7156 "in the wrong output section (%s)"),
7157 input_bfd,
7158 sym_name,
7159 howto->name,
7160 name);
7161
7162 bfd_set_error (bfd_error_bad_value);
7163 ret = FALSE;
7164 continue;
7165 }
7166
7167 if (r_type == R_PPC_EMB_SDA21)
7168 { /* fill in register field */
7169 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7170 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7171 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7172 }
7173 }
7174 break;
7175
7176 /* Relocate against the beginning of the section. */
7177 case R_PPC_SECTOFF:
7178 case R_PPC_SECTOFF_LO:
7179 case R_PPC_SECTOFF_HI:
7180 case R_PPC_SECTOFF_HA:
7181 if (sec == NULL || sec->output_section == NULL)
7182 {
7183 unresolved_reloc = TRUE;
7184 break;
7185 }
7186 addend -= sec->output_section->vma;
7187 break;
7188
7189 /* Negative relocations. */
7190 case R_PPC_EMB_NADDR32:
7191 case R_PPC_EMB_NADDR16:
7192 case R_PPC_EMB_NADDR16_LO:
7193 case R_PPC_EMB_NADDR16_HI:
7194 case R_PPC_EMB_NADDR16_HA:
7195 addend -= 2 * relocation;
7196 break;
7197
7198 case R_PPC_COPY:
7199 case R_PPC_GLOB_DAT:
7200 case R_PPC_JMP_SLOT:
7201 case R_PPC_RELATIVE:
7202 case R_PPC_PLT32:
7203 case R_PPC_PLTREL32:
7204 case R_PPC_PLT16_LO:
7205 case R_PPC_PLT16_HI:
7206 case R_PPC_PLT16_HA:
7207 case R_PPC_ADDR30:
7208 case R_PPC_EMB_RELSEC16:
7209 case R_PPC_EMB_RELST_LO:
7210 case R_PPC_EMB_RELST_HI:
7211 case R_PPC_EMB_RELST_HA:
7212 case R_PPC_EMB_BIT_FLD:
7213 (*_bfd_error_handler)
7214 (_("%B: relocation %s is not yet supported for symbol %s."),
7215 input_bfd,
7216 howto->name,
7217 sym_name);
7218
7219 bfd_set_error (bfd_error_invalid_operation);
7220 ret = FALSE;
7221 continue;
7222 }
7223
7224 /* Do any further special processing. */
7225 switch (r_type)
7226 {
7227 default:
7228 break;
7229
7230 case R_PPC_ADDR16_HA:
7231 case R_PPC_REL16_HA:
7232 case R_PPC_SECTOFF_HA:
7233 case R_PPC_TPREL16_HA:
7234 case R_PPC_DTPREL16_HA:
7235 case R_PPC_EMB_NADDR16_HA:
7236 case R_PPC_EMB_RELST_HA:
7237 /* It's just possible that this symbol is a weak symbol
7238 that's not actually defined anywhere. In that case,
7239 'sec' would be NULL, and we should leave the symbol
7240 alone (it will be set to zero elsewhere in the link). */
7241 if (sec == NULL)
7242 break;
7243 /* Fall thru */
7244
7245 case R_PPC_PLT16_HA:
7246 case R_PPC_GOT16_HA:
7247 case R_PPC_GOT_TLSGD16_HA:
7248 case R_PPC_GOT_TLSLD16_HA:
7249 case R_PPC_GOT_TPREL16_HA:
7250 case R_PPC_GOT_DTPREL16_HA:
7251 /* Add 0x10000 if sign bit in 0:15 is set.
7252 Bits 0:15 are not used. */
7253 addend += 0x8000;
7254 break;
7255 }
7256
7257 #ifdef DEBUG
7258 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7259 "offset = %ld, addend = %ld\n",
7260 howto->name,
7261 (int) r_type,
7262 sym_name,
7263 r_symndx,
7264 (long) rel->r_offset,
7265 (long) addend);
7266 #endif
7267
7268 if (unresolved_reloc
7269 && !((input_section->flags & SEC_DEBUGGING) != 0
7270 && h->def_dynamic))
7271 {
7272 (*_bfd_error_handler)
7273 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7274 input_bfd,
7275 input_section,
7276 (long) rel->r_offset,
7277 howto->name,
7278 sym_name);
7279 ret = FALSE;
7280 }
7281
7282 r = _bfd_final_link_relocate (howto,
7283 input_bfd,
7284 input_section,
7285 contents,
7286 rel->r_offset,
7287 relocation,
7288 addend);
7289
7290 if (r != bfd_reloc_ok)
7291 {
7292 if (r == bfd_reloc_overflow)
7293 {
7294 if (warned)
7295 continue;
7296 if (h != NULL
7297 && h->root.type == bfd_link_hash_undefweak
7298 && howto->pc_relative)
7299 {
7300 /* Assume this is a call protected by other code that
7301 detect the symbol is undefined. If this is the case,
7302 we can safely ignore the overflow. If not, the
7303 program is hosed anyway, and a little warning isn't
7304 going to help. */
7305
7306 continue;
7307 }
7308
7309 if (! (*info->callbacks->reloc_overflow) (info,
7310 (h ? &h->root : NULL),
7311 sym_name,
7312 howto->name,
7313 rel->r_addend,
7314 input_bfd,
7315 input_section,
7316 rel->r_offset))
7317 return FALSE;
7318 }
7319 else
7320 {
7321 (*_bfd_error_handler)
7322 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7323 input_bfd, input_section,
7324 (long) rel->r_offset, howto->name, sym_name, (int) r);
7325 ret = FALSE;
7326 }
7327 }
7328 }
7329
7330 #ifdef DEBUG
7331 fprintf (stderr, "\n");
7332 #endif
7333
7334 return ret;
7335 }
7336 \f
7337 #define PPC_LO(v) ((v) & 0xffff)
7338 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7339 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7340
7341 /* Finish up dynamic symbol handling. We set the contents of various
7342 dynamic sections here. */
7343
7344 static bfd_boolean
7345 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7346 struct bfd_link_info *info,
7347 struct elf_link_hash_entry *h,
7348 Elf_Internal_Sym *sym)
7349 {
7350 struct ppc_elf_link_hash_table *htab;
7351 struct plt_entry *ent;
7352 bfd_boolean doneone;
7353
7354 #ifdef DEBUG
7355 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7356 h->root.root.string);
7357 #endif
7358
7359 htab = ppc_elf_hash_table (info);
7360 BFD_ASSERT (htab->elf.dynobj != NULL);
7361
7362 doneone = FALSE;
7363 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7364 if (ent->plt.offset != (bfd_vma) -1)
7365 {
7366 if (!doneone)
7367 {
7368 Elf_Internal_Rela rela;
7369 bfd_byte *loc;
7370 bfd_vma reloc_index;
7371
7372 if (htab->plt_type == PLT_NEW)
7373 reloc_index = ent->plt.offset / 4;
7374 else
7375 {
7376 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7377 / htab->plt_slot_size);
7378 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7379 && htab->plt_type == PLT_OLD)
7380 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7381 }
7382
7383 /* This symbol has an entry in the procedure linkage table.
7384 Set it up. */
7385 if (htab->plt_type == PLT_VXWORKS)
7386 {
7387 bfd_vma got_offset;
7388 const bfd_vma *plt_entry;
7389
7390 /* The first three entries in .got.plt are reserved. */
7391 got_offset = (reloc_index + 3) * 4;
7392
7393 /* Use the right PLT. */
7394 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7395 : ppc_elf_vxworks_plt_entry;
7396
7397 /* Fill in the .plt on VxWorks. */
7398 if (info->shared)
7399 {
7400 bfd_put_32 (output_bfd,
7401 plt_entry[0] | PPC_HA (got_offset),
7402 htab->plt->contents + ent->plt.offset + 0);
7403 bfd_put_32 (output_bfd,
7404 plt_entry[1] | PPC_LO (got_offset),
7405 htab->plt->contents + ent->plt.offset + 4);
7406 }
7407 else
7408 {
7409 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7410
7411 bfd_put_32 (output_bfd,
7412 plt_entry[0] | PPC_HA (got_loc),
7413 htab->plt->contents + ent->plt.offset + 0);
7414 bfd_put_32 (output_bfd,
7415 plt_entry[1] | PPC_LO (got_loc),
7416 htab->plt->contents + ent->plt.offset + 4);
7417 }
7418
7419 bfd_put_32 (output_bfd, plt_entry[2],
7420 htab->plt->contents + ent->plt.offset + 8);
7421 bfd_put_32 (output_bfd, plt_entry[3],
7422 htab->plt->contents + ent->plt.offset + 12);
7423
7424 /* This instruction is an immediate load. The value loaded is
7425 the byte offset of the R_PPC_JMP_SLOT relocation from the
7426 start of the .rela.plt section. The value is stored in the
7427 low-order 16 bits of the load instruction. */
7428 /* NOTE: It appears that this is now an index rather than a
7429 prescaled offset. */
7430 bfd_put_32 (output_bfd,
7431 plt_entry[4] | reloc_index,
7432 htab->plt->contents + ent->plt.offset + 16);
7433 /* This instruction is a PC-relative branch whose target is
7434 the start of the PLT section. The address of this branch
7435 instruction is 20 bytes beyond the start of this PLT entry.
7436 The address is encoded in bits 6-29, inclusive. The value
7437 stored is right-shifted by two bits, permitting a 26-bit
7438 offset. */
7439 bfd_put_32 (output_bfd,
7440 (plt_entry[5]
7441 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7442 htab->plt->contents + ent->plt.offset + 20);
7443 bfd_put_32 (output_bfd, plt_entry[6],
7444 htab->plt->contents + ent->plt.offset + 24);
7445 bfd_put_32 (output_bfd, plt_entry[7],
7446 htab->plt->contents + ent->plt.offset + 28);
7447
7448 /* Fill in the GOT entry corresponding to this PLT slot with
7449 the address immediately after the the "bctr" instruction
7450 in this PLT entry. */
7451 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7452 + htab->plt->output_offset
7453 + ent->plt.offset + 16),
7454 htab->sgotplt->contents + got_offset);
7455
7456 if (!info->shared)
7457 {
7458 /* Fill in a couple of entries in .rela.plt.unloaded. */
7459 loc = htab->srelplt2->contents
7460 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7461 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7462 * sizeof (Elf32_External_Rela));
7463
7464 /* Provide the @ha relocation for the first instruction. */
7465 rela.r_offset = (htab->plt->output_section->vma
7466 + htab->plt->output_offset
7467 + ent->plt.offset + 2);
7468 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7469 R_PPC_ADDR16_HA);
7470 rela.r_addend = got_offset;
7471 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7472 loc += sizeof (Elf32_External_Rela);
7473
7474 /* Provide the @l relocation for the second instruction. */
7475 rela.r_offset = (htab->plt->output_section->vma
7476 + htab->plt->output_offset
7477 + ent->plt.offset + 6);
7478 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7479 R_PPC_ADDR16_LO);
7480 rela.r_addend = got_offset;
7481 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7482 loc += sizeof (Elf32_External_Rela);
7483
7484 /* Provide a relocation for the GOT entry corresponding to this
7485 PLT slot. Point it at the middle of the .plt entry. */
7486 rela.r_offset = (htab->sgotplt->output_section->vma
7487 + htab->sgotplt->output_offset
7488 + got_offset);
7489 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7490 R_PPC_ADDR32);
7491 rela.r_addend = ent->plt.offset + 16;
7492 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7493 }
7494
7495 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7496 In particular, the offset for the relocation is not the
7497 address of the PLT entry for this function, as specified
7498 by the ABI. Instead, the offset is set to the address of
7499 the GOT slot for this function. See EABI 4.4.4.1. */
7500 rela.r_offset = (htab->sgotplt->output_section->vma
7501 + htab->sgotplt->output_offset
7502 + got_offset);
7503
7504 }
7505 else
7506 {
7507 rela.r_offset = (htab->plt->output_section->vma
7508 + htab->plt->output_offset
7509 + ent->plt.offset);
7510 if (htab->plt_type == PLT_OLD)
7511 {
7512 /* We don't need to fill in the .plt. The ppc dynamic
7513 linker will fill it in. */
7514 }
7515 else
7516 {
7517 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7518 + htab->glink->output_section->vma
7519 + htab->glink->output_offset);
7520 bfd_put_32 (output_bfd, val,
7521 htab->plt->contents + ent->plt.offset);
7522 }
7523 }
7524
7525 /* Fill in the entry in the .rela.plt section. */
7526 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7527 rela.r_addend = 0;
7528
7529 loc = (htab->relplt->contents
7530 + reloc_index * sizeof (Elf32_External_Rela));
7531 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7532
7533 if (!h->def_regular)
7534 {
7535 /* Mark the symbol as undefined, rather than as
7536 defined in the .plt section. Leave the value if
7537 there were any relocations where pointer equality
7538 matters (this is a clue for the dynamic linker, to
7539 make function pointer comparisons work between an
7540 application and shared library), otherwise set it
7541 to zero. */
7542 sym->st_shndx = SHN_UNDEF;
7543 if (!h->pointer_equality_needed)
7544 sym->st_value = 0;
7545 else if (!h->ref_regular_nonweak)
7546 {
7547 /* This breaks function pointer comparisons, but
7548 that is better than breaking tests for a NULL
7549 function pointer. */
7550 sym->st_value = 0;
7551 }
7552 }
7553 doneone = TRUE;
7554 }
7555
7556 if (htab->plt_type == PLT_NEW)
7557 {
7558 bfd_vma plt;
7559 unsigned char *p;
7560
7561 plt = (ent->plt.offset
7562 + htab->plt->output_section->vma
7563 + htab->plt->output_offset);
7564 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7565
7566 if (info->shared || info->pie)
7567 {
7568 bfd_vma got = 0;
7569
7570 if (ent->addend >= 32768)
7571 got = (ent->addend
7572 + ent->sec->output_section->vma
7573 + ent->sec->output_offset);
7574 else if (htab->elf.hgot != NULL)
7575 got = SYM_VAL (htab->elf.hgot);
7576
7577 plt -= got;
7578
7579 if (plt + 0x8000 < 0x10000)
7580 {
7581 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7582 p += 4;
7583 bfd_put_32 (output_bfd, MTCTR_11, p);
7584 p += 4;
7585 bfd_put_32 (output_bfd, BCTR, p);
7586 p += 4;
7587 bfd_put_32 (output_bfd, NOP, p);
7588 p += 4;
7589 }
7590 else
7591 {
7592 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7593 p += 4;
7594 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7595 p += 4;
7596 bfd_put_32 (output_bfd, MTCTR_11, p);
7597 p += 4;
7598 bfd_put_32 (output_bfd, BCTR, p);
7599 p += 4;
7600 }
7601 }
7602 else
7603 {
7604 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7605 p += 4;
7606 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7607 p += 4;
7608 bfd_put_32 (output_bfd, MTCTR_11, p);
7609 p += 4;
7610 bfd_put_32 (output_bfd, BCTR, p);
7611 p += 4;
7612
7613 /* We only need one non-PIC glink stub. */
7614 break;
7615 }
7616 }
7617 else
7618 break;
7619 }
7620
7621 if (h->needs_copy)
7622 {
7623 asection *s;
7624 Elf_Internal_Rela rela;
7625 bfd_byte *loc;
7626
7627 /* This symbols needs a copy reloc. Set it up. */
7628
7629 #ifdef DEBUG
7630 fprintf (stderr, ", copy");
7631 #endif
7632
7633 BFD_ASSERT (h->dynindx != -1);
7634
7635 if (ppc_elf_hash_entry (h)->has_sda_refs)
7636 s = htab->relsbss;
7637 else
7638 s = htab->relbss;
7639 BFD_ASSERT (s != NULL);
7640
7641 rela.r_offset = SYM_VAL (h);
7642 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7643 rela.r_addend = 0;
7644 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7645 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7646 }
7647
7648 #ifdef DEBUG
7649 fprintf (stderr, "\n");
7650 #endif
7651
7652 /* Mark some specially defined symbols as absolute. */
7653 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7654 || (!htab->is_vxworks
7655 && (h == htab->elf.hgot
7656 || strcmp (h->root.root.string,
7657 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7658 sym->st_shndx = SHN_ABS;
7659
7660 return TRUE;
7661 }
7662 \f
7663 static enum elf_reloc_type_class
7664 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7665 {
7666 switch (ELF32_R_TYPE (rela->r_info))
7667 {
7668 case R_PPC_RELATIVE:
7669 return reloc_class_relative;
7670 case R_PPC_REL24:
7671 case R_PPC_ADDR24:
7672 case R_PPC_JMP_SLOT:
7673 return reloc_class_plt;
7674 case R_PPC_COPY:
7675 return reloc_class_copy;
7676 default:
7677 return reloc_class_normal;
7678 }
7679 }
7680 \f
7681 /* Finish up the dynamic sections. */
7682
7683 static bfd_boolean
7684 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7685 struct bfd_link_info *info)
7686 {
7687 asection *sdyn;
7688 asection *splt;
7689 struct ppc_elf_link_hash_table *htab;
7690 bfd_vma got;
7691 bfd *dynobj;
7692 bfd_boolean ret = TRUE;
7693
7694 #ifdef DEBUG
7695 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7696 #endif
7697
7698 htab = ppc_elf_hash_table (info);
7699 dynobj = elf_hash_table (info)->dynobj;
7700 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7701 if (htab->is_vxworks)
7702 splt = bfd_get_section_by_name (dynobj, ".plt");
7703 else
7704 splt = NULL;
7705
7706 got = 0;
7707 if (htab->elf.hgot != NULL)
7708 got = SYM_VAL (htab->elf.hgot);
7709
7710 if (htab->elf.dynamic_sections_created)
7711 {
7712 Elf32_External_Dyn *dyncon, *dynconend;
7713
7714 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7715
7716 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7717 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7718 for (; dyncon < dynconend; dyncon++)
7719 {
7720 Elf_Internal_Dyn dyn;
7721 asection *s;
7722
7723 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7724
7725 switch (dyn.d_tag)
7726 {
7727 case DT_PLTGOT:
7728 if (htab->is_vxworks)
7729 s = htab->sgotplt;
7730 else
7731 s = htab->plt;
7732 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7733 break;
7734
7735 case DT_PLTRELSZ:
7736 dyn.d_un.d_val = htab->relplt->size;
7737 break;
7738
7739 case DT_JMPREL:
7740 s = htab->relplt;
7741 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7742 break;
7743
7744 case DT_PPC_GOT:
7745 dyn.d_un.d_ptr = got;
7746 break;
7747
7748 case DT_RELASZ:
7749 if (htab->is_vxworks)
7750 {
7751 if (htab->relplt)
7752 dyn.d_un.d_ptr -= htab->relplt->size;
7753 break;
7754 }
7755 continue;
7756
7757 default:
7758 if (htab->is_vxworks
7759 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7760 break;
7761 continue;
7762 }
7763
7764 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7765 }
7766 }
7767
7768 if (htab->got != NULL)
7769 {
7770 if (htab->elf.hgot->root.u.def.section == htab->got
7771 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
7772 {
7773 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
7774
7775 p += htab->elf.hgot->root.u.def.value;
7776 if (htab->plt_type == PLT_OLD)
7777 {
7778 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
7779 so that a function can easily find the address of
7780 _GLOBAL_OFFSET_TABLE_. */
7781 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
7782 < htab->elf.hgot->root.u.def.section->size);
7783 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
7784 }
7785
7786 if (sdyn != NULL)
7787 {
7788 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
7789 BFD_ASSERT (htab->elf.hgot->root.u.def.value
7790 < htab->elf.hgot->root.u.def.section->size);
7791 bfd_put_32 (output_bfd, val, p);
7792 }
7793 }
7794 else
7795 {
7796 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7797 htab->elf.hgot->root.root.string,
7798 (htab->sgotplt != NULL
7799 ? htab->sgotplt->name : htab->got->name));
7800 bfd_set_error (bfd_error_bad_value);
7801 ret = FALSE;
7802 }
7803
7804 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7805 }
7806
7807 /* Fill in the first entry in the VxWorks procedure linkage table. */
7808 if (splt && splt->size > 0)
7809 {
7810 /* Use the right PLT. */
7811 static const bfd_vma *plt_entry = NULL;
7812 plt_entry = info->shared ?
7813 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7814
7815 if (!info->shared)
7816 {
7817 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7818
7819 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7820 splt->contents + 0);
7821 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
7822 splt->contents + 4);
7823 }
7824 else
7825 {
7826 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7827 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7828 }
7829 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7830 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7831 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7832 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7833 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7834 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7835
7836 if (! info->shared)
7837 {
7838 Elf_Internal_Rela rela;
7839 bfd_byte *loc;
7840
7841 loc = htab->srelplt2->contents;
7842
7843 /* Output the @ha relocation for the first instruction. */
7844 rela.r_offset = (htab->plt->output_section->vma
7845 + htab->plt->output_offset
7846 + 2);
7847 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7848 rela.r_addend = 0;
7849 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7850 loc += sizeof (Elf32_External_Rela);
7851
7852 /* Output the @l relocation for the second instruction. */
7853 rela.r_offset = (htab->plt->output_section->vma
7854 + htab->plt->output_offset
7855 + 6);
7856 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7857 rela.r_addend = 0;
7858 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7859 loc += sizeof (Elf32_External_Rela);
7860
7861 /* Fix up the remaining relocations. They may have the wrong
7862 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7863 in which symbols were output. */
7864 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7865 {
7866 Elf_Internal_Rela rel;
7867
7868 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7869 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7870 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7871 loc += sizeof (Elf32_External_Rela);
7872
7873 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7874 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7875 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7876 loc += sizeof (Elf32_External_Rela);
7877
7878 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7879 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7880 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7881 loc += sizeof (Elf32_External_Rela);
7882 }
7883 }
7884 }
7885
7886 if (htab->glink != NULL && htab->glink->contents != NULL)
7887 {
7888 unsigned char *p;
7889 unsigned char *endp;
7890 bfd_vma res0;
7891 unsigned int i;
7892
7893 /*
7894 * PIC glink code is the following:
7895 *
7896 * # ith PLT code stub.
7897 * addis 11,30,(plt+(i-1)*4-got)@ha
7898 * lwz 11,(plt+(i-1)*4-got)@l(11)
7899 * mtctr 11
7900 * bctr
7901 *
7902 * # A table of branches, one for each plt entry.
7903 * # The idea is that the plt call stub loads ctr and r11 with these
7904 * # addresses, so (r11 - res_0) gives the plt index * 4.
7905 * res_0: b PLTresolve
7906 * res_1: b PLTresolve
7907 * .
7908 * # Some number of entries towards the end can be nops
7909 * res_n_m3: nop
7910 * res_n_m2: nop
7911 * res_n_m1:
7912 *
7913 * PLTresolve:
7914 * addis 11,11,(1f-res_0)@ha
7915 * mflr 0
7916 * bcl 20,31,1f
7917 * 1: addi 11,11,(1b-res_0)@l
7918 * mflr 12
7919 * mtlr 0
7920 * sub 11,11,12 # r11 = index * 4
7921 * addis 12,12,(got+4-1b)@ha
7922 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7923 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7924 * mtctr 0
7925 * add 0,11,11
7926 * add 11,0,11 # r11 = index * 12 = reloc offset.
7927 * bctr
7928 */
7929 static const unsigned int pic_plt_resolve[] =
7930 {
7931 ADDIS_11_11,
7932 MFLR_0,
7933 BCL_20_31,
7934 ADDI_11_11,
7935 MFLR_12,
7936 MTLR_0,
7937 SUB_11_11_12,
7938 ADDIS_12_12,
7939 LWZ_0_12,
7940 LWZ_12_12,
7941 MTCTR_0,
7942 ADD_0_11_11,
7943 ADD_11_0_11,
7944 BCTR,
7945 NOP,
7946 NOP
7947 };
7948
7949 /*
7950 * Non-PIC glink code is a little simpler.
7951 *
7952 * # ith PLT code stub.
7953 * lis 11,(plt+(i-1)*4)@ha
7954 * lwz 11,(plt+(i-1)*4)@l(11)
7955 * mtctr 11
7956 * bctr
7957 *
7958 * The branch table is the same, then comes
7959 *
7960 * PLTresolve:
7961 * lis 12,(got+4)@ha
7962 * addis 11,11,(-res_0)@ha
7963 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7964 * addi 11,11,(-res_0)@l # r11 = index * 4
7965 * mtctr 0
7966 * add 0,11,11
7967 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7968 * add 11,0,11 # r11 = index * 12 = reloc offset.
7969 * bctr
7970 */
7971 static const unsigned int plt_resolve[] =
7972 {
7973 LIS_12,
7974 ADDIS_11_11,
7975 LWZ_0_12,
7976 ADDI_11_11,
7977 MTCTR_0,
7978 ADD_0_11_11,
7979 LWZ_12_12,
7980 ADD_11_0_11,
7981 BCTR,
7982 NOP,
7983 NOP,
7984 NOP,
7985 NOP,
7986 NOP,
7987 NOP,
7988 NOP
7989 };
7990
7991 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7992 abort ();
7993 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7994 abort ();
7995
7996 /* Build the branch table, one for each plt entry (less one),
7997 and perhaps some padding. */
7998 p = htab->glink->contents;
7999 p += htab->glink_pltresolve;
8000 endp = htab->glink->contents;
8001 endp += htab->glink->size - GLINK_PLTRESOLVE;
8002 while (p < endp - 8 * 4)
8003 {
8004 bfd_put_32 (output_bfd, B + endp - p, p);
8005 p += 4;
8006 }
8007 while (p < endp)
8008 {
8009 bfd_put_32 (output_bfd, NOP, p);
8010 p += 4;
8011 }
8012
8013 res0 = (htab->glink_pltresolve
8014 + htab->glink->output_section->vma
8015 + htab->glink->output_offset);
8016
8017 /* Last comes the PLTresolve stub. */
8018 if (info->shared || info->pie)
8019 {
8020 bfd_vma bcl;
8021
8022 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8023 {
8024 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8025 p += 4;
8026 }
8027 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8028
8029 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8030 + htab->glink->output_section->vma
8031 + htab->glink->output_offset);
8032
8033 bfd_put_32 (output_bfd,
8034 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8035 bfd_put_32 (output_bfd,
8036 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8037 bfd_put_32 (output_bfd,
8038 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8039 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8040 {
8041 bfd_put_32 (output_bfd,
8042 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8043 bfd_put_32 (output_bfd,
8044 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8045 }
8046 else
8047 {
8048 bfd_put_32 (output_bfd,
8049 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8050 bfd_put_32 (output_bfd,
8051 LWZ_12_12 + 4, p + 9*4);
8052 }
8053 }
8054 else
8055 {
8056 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8057 {
8058 bfd_put_32 (output_bfd, plt_resolve[i], p);
8059 p += 4;
8060 }
8061 p -= 4 * ARRAY_SIZE (plt_resolve);
8062
8063 bfd_put_32 (output_bfd,
8064 LIS_12 + PPC_HA (got + 4), p + 0*4);
8065 bfd_put_32 (output_bfd,
8066 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8067 bfd_put_32 (output_bfd,
8068 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8069 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8070 {
8071 bfd_put_32 (output_bfd,
8072 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8073 bfd_put_32 (output_bfd,
8074 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8075 }
8076 else
8077 {
8078 bfd_put_32 (output_bfd,
8079 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8080 bfd_put_32 (output_bfd,
8081 LWZ_12_12 + 4, p + 6*4);
8082 }
8083 }
8084 }
8085
8086 return ret;
8087 }
8088 \f
8089 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8090 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8091 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8092 #define TARGET_BIG_NAME "elf32-powerpc"
8093 #define ELF_ARCH bfd_arch_powerpc
8094 #define ELF_MACHINE_CODE EM_PPC
8095 #ifdef __QNXTARGET__
8096 #define ELF_MAXPAGESIZE 0x1000
8097 #else
8098 #define ELF_MAXPAGESIZE 0x10000
8099 #endif
8100 #define ELF_MINPAGESIZE 0x1000
8101 #define ELF_COMMONPAGESIZE 0x1000
8102 #define elf_info_to_howto ppc_elf_info_to_howto
8103
8104 #ifdef EM_CYGNUS_POWERPC
8105 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8106 #endif
8107
8108 #ifdef EM_PPC_OLD
8109 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8110 #endif
8111
8112 #define elf_backend_plt_not_loaded 1
8113 #define elf_backend_can_gc_sections 1
8114 #define elf_backend_can_refcount 1
8115 #define elf_backend_rela_normal 1
8116
8117 #define bfd_elf32_mkobject ppc_elf_mkobject
8118 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8119 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8120 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8121 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8122 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8123 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8124 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8125
8126 #define elf_backend_object_p ppc_elf_object_p
8127 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8128 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8129 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8130 #define elf_backend_relocate_section ppc_elf_relocate_section
8131 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8132 #define elf_backend_check_relocs ppc_elf_check_relocs
8133 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8134 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8135 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8136 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8137 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8138 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8139 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8140 #define elf_backend_fake_sections ppc_elf_fake_sections
8141 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8142 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8143 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8144 #define elf_backend_write_core_note ppc_elf_write_core_note
8145 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8146 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8147 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8148 #define elf_backend_write_section ppc_elf_write_section
8149 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8150 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8151 #define elf_backend_action_discarded ppc_elf_action_discarded
8152 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8153
8154 #include "elf32-target.h"
8155
8156 /* VxWorks Target */
8157
8158 #undef TARGET_LITTLE_SYM
8159 #undef TARGET_LITTLE_NAME
8160
8161 #undef TARGET_BIG_SYM
8162 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8163 #undef TARGET_BIG_NAME
8164 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8165
8166 /* VxWorks uses the elf default section flags for .plt. */
8167 static const struct bfd_elf_special_section *
8168 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8169 {
8170 if (sec->name == NULL)
8171 return NULL;
8172
8173 if (strcmp (sec->name, ".plt") == 0)
8174 return _bfd_elf_get_sec_type_attr (abfd, sec);
8175
8176 return ppc_elf_get_sec_type_attr (abfd, sec);
8177 }
8178
8179 /* Like ppc_elf_link_hash_table_create, but overrides
8180 appropriately for VxWorks. */
8181 static struct bfd_link_hash_table *
8182 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8183 {
8184 struct bfd_link_hash_table *ret;
8185
8186 ret = ppc_elf_link_hash_table_create (abfd);
8187 if (ret)
8188 {
8189 struct ppc_elf_link_hash_table *htab
8190 = (struct ppc_elf_link_hash_table *)ret;
8191 htab->is_vxworks = 1;
8192 htab->plt_type = PLT_VXWORKS;
8193 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8194 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8195 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8196 }
8197 return ret;
8198 }
8199
8200 /* Tweak magic VxWorks symbols as they are loaded. */
8201 static bfd_boolean
8202 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8203 struct bfd_link_info *info,
8204 Elf_Internal_Sym *sym,
8205 const char **namep ATTRIBUTE_UNUSED,
8206 flagword *flagsp ATTRIBUTE_UNUSED,
8207 asection **secp,
8208 bfd_vma *valp)
8209 {
8210 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8211 valp))
8212 return FALSE;
8213
8214 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8215 }
8216
8217 static void
8218 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8219 {
8220 ppc_elf_final_write_processing(abfd, linker);
8221 elf_vxworks_final_write_processing(abfd, linker);
8222 }
8223
8224 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8225 define it. */
8226 #undef elf_backend_want_plt_sym
8227 #define elf_backend_want_plt_sym 1
8228 #undef elf_backend_want_got_plt
8229 #define elf_backend_want_got_plt 1
8230 #undef elf_backend_got_symbol_offset
8231 #define elf_backend_got_symbol_offset 0
8232 #undef elf_backend_plt_not_loaded
8233 #define elf_backend_plt_not_loaded 0
8234 #undef elf_backend_plt_readonly
8235 #define elf_backend_plt_readonly 1
8236 #undef elf_backend_got_header_size
8237 #define elf_backend_got_header_size 12
8238
8239 #undef bfd_elf32_get_synthetic_symtab
8240
8241 #undef bfd_elf32_bfd_link_hash_table_create
8242 #define bfd_elf32_bfd_link_hash_table_create \
8243 ppc_elf_vxworks_link_hash_table_create
8244 #undef elf_backend_add_symbol_hook
8245 #define elf_backend_add_symbol_hook \
8246 ppc_elf_vxworks_add_symbol_hook
8247 #undef elf_backend_link_output_symbol_hook
8248 #define elf_backend_link_output_symbol_hook \
8249 elf_vxworks_link_output_symbol_hook
8250 #undef elf_backend_final_write_processing
8251 #define elf_backend_final_write_processing \
8252 ppc_elf_vxworks_final_write_processing
8253 #undef elf_backend_get_sec_type_attr
8254 #define elf_backend_get_sec_type_attr \
8255 ppc_elf_vxworks_get_sec_type_attr
8256 #undef elf_backend_emit_relocs
8257 #define elf_backend_emit_relocs \
8258 elf_vxworks_emit_relocs
8259
8260 #undef elf32_bed
8261 #define elf32_bed ppc_elf_vxworks_bed
8262
8263 #include "elf32-target.h"
GDB Binutils - Deliverables
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