projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
PR ld/10406
[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 relocs 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 HOWTO (R_PPC_TLSGD,
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 32, /* bitsize */
775 FALSE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 bfd_elf_generic_reloc, /* special_function */
779 "R_PPC_TLSGD", /* name */
780 FALSE, /* partial_inplace */
781 0, /* src_mask */
782 0, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 HOWTO (R_PPC_TLSLD,
786 0, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 32, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC_TLSLD", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* Computes the load module index of the load module that contains the
800 definition of its TLS sym. */
801 HOWTO (R_PPC_DTPMOD32,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_DTPMOD32", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0xffffffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes a dtv-relative displacement, the difference between the value
816 of sym+add and the base address of the thread-local storage block that
817 contains the definition of sym, minus 0x8000. */
818 HOWTO (R_PPC_DTPREL32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPREL32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* A 16 bit dtprel reloc. */
833 HOWTO (R_PPC_DTPREL16,
834 0, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_signed, /* complain_on_overflow */
840 ppc_elf_unhandled_reloc, /* special_function */
841 "R_PPC_DTPREL16", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* Like DTPREL16, but no overflow. */
848 HOWTO (R_PPC_DTPREL16_LO,
849 0, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_DTPREL16_LO", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* Like DTPREL16_LO, but next higher group of 16 bits. */
863 HOWTO (R_PPC_DTPREL16_HI,
864 16, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_DTPREL16_HI", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* Like DTPREL16_HI, but adjust for low 16 bits. */
878 HOWTO (R_PPC_DTPREL16_HA,
879 16, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_DTPREL16_HA", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* Computes a tp-relative displacement, the difference between the value of
893 sym+add and the value of the thread pointer (r13). */
894 HOWTO (R_PPC_TPREL32,
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 32, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_TPREL32", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffffffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* A 16 bit tprel reloc. */
909 HOWTO (R_PPC_TPREL16,
910 0, /* rightshift */
911 1, /* size (0 = byte, 1 = short, 2 = long) */
912 16, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_signed, /* complain_on_overflow */
916 ppc_elf_unhandled_reloc, /* special_function */
917 "R_PPC_TPREL16", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 0xffff, /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* Like TPREL16, but no overflow. */
924 HOWTO (R_PPC_TPREL16_LO,
925 0, /* rightshift */
926 1, /* size (0 = byte, 1 = short, 2 = long) */
927 16, /* bitsize */
928 FALSE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc_elf_unhandled_reloc, /* special_function */
932 "R_PPC_TPREL16_LO", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 0xffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
937
938 /* Like TPREL16_LO, but next higher group of 16 bits. */
939 HOWTO (R_PPC_TPREL16_HI,
940 16, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc_elf_unhandled_reloc, /* special_function */
947 "R_PPC_TPREL16_HI", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* Like TPREL16_HI, but adjust for low 16 bits. */
954 HOWTO (R_PPC_TPREL16_HA,
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc_elf_unhandled_reloc, /* special_function */
962 "R_PPC_TPREL16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
969 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
970 to the first entry. */
971 HOWTO (R_PPC_GOT_TLSGD16,
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_TLSGD16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like GOT_TLSGD16, but no overflow. */
986 HOWTO (R_PPC_GOT_TLSGD16_LO,
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_TLSGD16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_TLSGD16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_TLSGD16_HI", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_TLSGD16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_TLSGD16_HA", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1031 with values (sym+add)@dtpmod and zero, and computes the offset to the
1032 first entry. */
1033 HOWTO (R_PPC_GOT_TLSLD16,
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_signed, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSLD16", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like GOT_TLSLD16, but no overflow. */
1048 HOWTO (R_PPC_GOT_TLSLD16_LO,
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 FALSE, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc_elf_unhandled_reloc, /* special_function */
1056 "R_PPC_GOT_TLSLD16_LO", /* name */
1057 FALSE, /* partial_inplace */
1058 0, /* src_mask */
1059 0xffff, /* dst_mask */
1060 FALSE), /* pcrel_offset */
1061
1062 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1063 HOWTO (R_PPC_GOT_TLSLD16_HI,
1064 16, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc_elf_unhandled_reloc, /* special_function */
1071 "R_PPC_GOT_TLSLD16_HI", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1078 HOWTO (R_PPC_GOT_TLSLD16_HA,
1079 16, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc_elf_unhandled_reloc, /* special_function */
1086 "R_PPC_GOT_TLSLD16_HA", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1093 the offset to the entry. */
1094 HOWTO (R_PPC_GOT_DTPREL16,
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_DTPREL16", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like GOT_DTPREL16, but no overflow. */
1109 HOWTO (R_PPC_GOT_DTPREL16_LO,
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc_elf_unhandled_reloc, /* special_function */
1117 "R_PPC_GOT_DTPREL16_LO", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xffff, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1124 HOWTO (R_PPC_GOT_DTPREL16_HI,
1125 16, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 ppc_elf_unhandled_reloc, /* special_function */
1132 "R_PPC_GOT_DTPREL16_HI", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xffff, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1139 HOWTO (R_PPC_GOT_DTPREL16_HA,
1140 16, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 ppc_elf_unhandled_reloc, /* special_function */
1147 "R_PPC_GOT_DTPREL16_HA", /* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xffff, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1154 offset to the entry. */
1155 HOWTO (R_PPC_GOT_TPREL16,
1156 0, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_signed, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_TPREL16", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Like GOT_TPREL16, but no overflow. */
1170 HOWTO (R_PPC_GOT_TPREL16_LO,
1171 0, /* rightshift */
1172 1, /* size (0 = byte, 1 = short, 2 = long) */
1173 16, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 ppc_elf_unhandled_reloc, /* special_function */
1178 "R_PPC_GOT_TPREL16_LO", /* name */
1179 FALSE, /* partial_inplace */
1180 0, /* src_mask */
1181 0xffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1185 HOWTO (R_PPC_GOT_TPREL16_HI,
1186 16, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_dont, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TPREL16_HI", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1200 HOWTO (R_PPC_GOT_TPREL16_HA,
1201 16, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TPREL16_HA", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* The remaining relocs are from the Embedded ELF ABI, and are not
1215 in the SVR4 ELF ABI. */
1216
1217 /* 32 bit value resulting from the addend minus the symbol. */
1218 HOWTO (R_PPC_EMB_NADDR32, /* type */
1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_bitfield, /* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
1226 "R_PPC_EMB_NADDR32", /* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* 16 bit value resulting from the addend minus the symbol. */
1233 HOWTO (R_PPC_EMB_NADDR16, /* type */
1234 0, /* rightshift */
1235 1, /* size (0 = byte, 1 = short, 2 = long) */
1236 16, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_bitfield, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC_EMB_NADDR16", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0xffff, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* 16 bit value resulting from the addend minus the symbol. */
1248 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_dont,/* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_ADDR16_LO", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* The high order 16 bits of the addend minus the symbol. */
1263 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1264 16, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_NADDR16_HI", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* The high order 16 bits of the result of the addend minus the address,
1278 plus 1 if the contents of the low 16 bits, treated as a signed number,
1279 is negative. */
1280 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_addr16_ha_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HA", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* 16 bit value resulting from allocating a 4 byte word to hold an
1295 address in the .sdata section, and returning the offset from
1296 _SDA_BASE_ for that relocation. */
1297 HOWTO (R_PPC_EMB_SDAI16, /* type */
1298 0, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_signed, /* complain_on_overflow */
1304 bfd_elf_generic_reloc, /* special_function */
1305 "R_PPC_EMB_SDAI16", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata2 section, and returning the offset from
1313 _SDA2_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDA2I16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1329 small data items. */
1330 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 bfd_elf_generic_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2REL", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1345 signed offset from the appropriate base, and filling in the register
1346 field with the appropriate register (0, 2, or 13). */
1347 HOWTO (R_PPC_EMB_SDA21, /* type */
1348 0, /* rightshift */
1349 2, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA21", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocation not handled: R_PPC_EMB_MRKREF */
1362 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1363 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1364 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1365 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1366 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1367
1368 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1369 in the 16 bit signed offset from the appropriate base, and filling in the
1370 register field with the appropriate register (0, 2, or 13). */
1371 HOWTO (R_PPC_EMB_RELSDA, /* type */
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 TRUE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_signed, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC_EMB_RELSDA", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 HOWTO (R_PPC_IRELATIVE, /* type */
1386 0, /* rightshift */
1387 2, /* size (0 = byte, 1 = short, 2 = long) */
1388 32, /* bitsize */
1389 FALSE, /* pc_relative */
1390 0, /* bitpos */
1391 complain_overflow_bitfield, /* complain_on_overflow */
1392 bfd_elf_generic_reloc, /* special_function */
1393 "R_PPC_IRELATIVE", /* name */
1394 FALSE, /* partial_inplace */
1395 0, /* src_mask */
1396 0xffffffff, /* dst_mask */
1397 FALSE), /* pcrel_offset */
1398
1399 /* A 16 bit relative relocation. */
1400 HOWTO (R_PPC_REL16, /* type */
1401 0, /* rightshift */
1402 1, /* size (0 = byte, 1 = short, 2 = long) */
1403 16, /* bitsize */
1404 TRUE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_bitfield, /* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 "R_PPC_REL16", /* name */
1409 FALSE, /* partial_inplace */
1410 0, /* src_mask */
1411 0xffff, /* dst_mask */
1412 TRUE), /* pcrel_offset */
1413
1414 /* A 16 bit relative relocation without overflow. */
1415 HOWTO (R_PPC_REL16_LO, /* type */
1416 0, /* rightshift */
1417 1, /* size (0 = byte, 1 = short, 2 = long) */
1418 16, /* bitsize */
1419 TRUE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_PPC_REL16_LO", /* name */
1424 FALSE, /* partial_inplace */
1425 0, /* src_mask */
1426 0xffff, /* dst_mask */
1427 TRUE), /* pcrel_offset */
1428
1429 /* The high order 16 bits of a relative address. */
1430 HOWTO (R_PPC_REL16_HI, /* type */
1431 16, /* rightshift */
1432 1, /* size (0 = byte, 1 = short, 2 = long) */
1433 16, /* bitsize */
1434 TRUE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont, /* complain_on_overflow */
1437 bfd_elf_generic_reloc, /* special_function */
1438 "R_PPC_REL16_HI", /* name */
1439 FALSE, /* partial_inplace */
1440 0, /* src_mask */
1441 0xffff, /* dst_mask */
1442 TRUE), /* pcrel_offset */
1443
1444 /* The high order 16 bits of a relative address, plus 1 if the contents of
1445 the low 16 bits, treated as a signed number, is negative. */
1446 HOWTO (R_PPC_REL16_HA, /* type */
1447 16, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 TRUE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc_elf_addr16_ha_reloc, /* special_function */
1454 "R_PPC_REL16_HA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 TRUE), /* pcrel_offset */
1459
1460 /* GNU extension to record C++ vtable hierarchy. */
1461 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1462 0, /* rightshift */
1463 0, /* size (0 = byte, 1 = short, 2 = long) */
1464 0, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_dont, /* complain_on_overflow */
1468 NULL, /* special_function */
1469 "R_PPC_GNU_VTINHERIT", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* GNU extension to record C++ vtable member usage. */
1476 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1477 0, /* rightshift */
1478 0, /* size (0 = byte, 1 = short, 2 = long) */
1479 0, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 NULL, /* special_function */
1484 "R_PPC_GNU_VTENTRY", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Phony reloc to handle AIX style TOC entries. */
1491 HOWTO (R_PPC_TOC16, /* type */
1492 0, /* rightshift */
1493 1, /* size (0 = byte, 1 = short, 2 = long) */
1494 16, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_signed, /* complain_on_overflow */
1498 bfd_elf_generic_reloc, /* special_function */
1499 "R_PPC_TOC16", /* name */
1500 FALSE, /* partial_inplace */
1501 0, /* src_mask */
1502 0xffff, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504 };
1505 \f
1506 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1507
1508 static void
1509 ppc_elf_howto_init (void)
1510 {
1511 unsigned int i, type;
1512
1513 for (i = 0;
1514 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1515 i++)
1516 {
1517 type = ppc_elf_howto_raw[i].type;
1518 if (type >= (sizeof (ppc_elf_howto_table)
1519 / sizeof (ppc_elf_howto_table[0])))
1520 abort ();
1521 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1522 }
1523 }
1524
1525 static reloc_howto_type *
1526 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1527 bfd_reloc_code_real_type code)
1528 {
1529 enum elf_ppc_reloc_type r;
1530
1531 /* Initialize howto table if not already done. */
1532 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1533 ppc_elf_howto_init ();
1534
1535 switch (code)
1536 {
1537 default:
1538 return NULL;
1539
1540 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1541 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1542 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1543 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1544 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1545 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1546 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1547 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1548 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1549 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1550 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1551 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1552 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1553 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1554 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1555 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1556 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1557 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1558 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1559 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1560 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1561 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1562 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1563 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1564 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1565 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1566 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1567 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1568 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1569 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1570 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1571 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1572 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1573 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1574 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1575 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1576 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1577 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1578 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1579 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1580 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1581 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1582 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1583 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1584 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1585 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1586 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1587 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1588 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1589 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1590 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1591 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1592 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1593 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1594 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1595 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1596 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1597 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1598 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1599 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1600 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1601 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1602 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1603 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1604 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1605 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1606 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1607 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1608 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1609 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1610 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1611 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1612 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1613 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1614 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1615 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1616 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1617 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1618 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1619 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1620 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1621 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1622 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1623 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1624 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1625 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1626 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1627 }
1628
1629 return ppc_elf_howto_table[r];
1630 };
1631
1632 static reloc_howto_type *
1633 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1634 const char *r_name)
1635 {
1636 unsigned int i;
1637
1638 for (i = 0;
1639 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1640 i++)
1641 if (ppc_elf_howto_raw[i].name != NULL
1642 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1643 return &ppc_elf_howto_raw[i];
1644
1645 return NULL;
1646 }
1647
1648 /* Set the howto pointer for a PowerPC ELF reloc. */
1649
1650 static void
1651 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1652 arelent *cache_ptr,
1653 Elf_Internal_Rela *dst)
1654 {
1655 /* Initialize howto table if not already done. */
1656 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1657 ppc_elf_howto_init ();
1658
1659 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1660 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1661
1662 /* Just because the above assert didn't trigger doesn't mean that
1663 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1664 if (!cache_ptr->howto)
1665 {
1666 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1667 abfd, ELF32_R_TYPE (dst->r_info));
1668 bfd_set_error (bfd_error_bad_value);
1669
1670 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1671 }
1672 }
1673
1674 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1675
1676 static bfd_reloc_status_type
1677 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1678 arelent *reloc_entry,
1679 asymbol *symbol,
1680 void *data ATTRIBUTE_UNUSED,
1681 asection *input_section,
1682 bfd *output_bfd,
1683 char **error_message ATTRIBUTE_UNUSED)
1684 {
1685 bfd_vma relocation;
1686
1687 if (output_bfd != NULL)
1688 {
1689 reloc_entry->address += input_section->output_offset;
1690 return bfd_reloc_ok;
1691 }
1692
1693 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1694 return bfd_reloc_outofrange;
1695
1696 if (bfd_is_com_section (symbol->section))
1697 relocation = 0;
1698 else
1699 relocation = symbol->value;
1700
1701 relocation += symbol->section->output_section->vma;
1702 relocation += symbol->section->output_offset;
1703 relocation += reloc_entry->addend;
1704 if (reloc_entry->howto->pc_relative)
1705 relocation -= reloc_entry->address;
1706
1707 reloc_entry->addend += (relocation & 0x8000) << 1;
1708
1709 return bfd_reloc_continue;
1710 }
1711
1712 static bfd_reloc_status_type
1713 ppc_elf_unhandled_reloc (bfd *abfd,
1714 arelent *reloc_entry,
1715 asymbol *symbol,
1716 void *data,
1717 asection *input_section,
1718 bfd *output_bfd,
1719 char **error_message)
1720 {
1721 /* If this is a relocatable link (output_bfd test tells us), just
1722 call the generic function. Any adjustment will be done at final
1723 link time. */
1724 if (output_bfd != NULL)
1725 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1726 input_section, output_bfd, error_message);
1727
1728 if (error_message != NULL)
1729 {
1730 static char buf[60];
1731 sprintf (buf, _("generic linker can't handle %s"),
1732 reloc_entry->howto->name);
1733 *error_message = buf;
1734 }
1735 return bfd_reloc_dangerous;
1736 }
1737 \f
1738 /* Sections created by the linker. */
1739
1740 typedef struct elf_linker_section
1741 {
1742 /* Pointer to the bfd section. */
1743 asection *section;
1744 /* Section name. */
1745 const char *name;
1746 /* Associated bss section name. */
1747 const char *bss_name;
1748 /* Associated symbol name. */
1749 const char *sym_name;
1750 /* Associated symbol. */
1751 struct elf_link_hash_entry *sym;
1752 } elf_linker_section_t;
1753
1754 /* Linked list of allocated pointer entries. This hangs off of the
1755 symbol lists, and provides allows us to return different pointers,
1756 based on different addend's. */
1757
1758 typedef struct elf_linker_section_pointers
1759 {
1760 /* next allocated pointer for this symbol */
1761 struct elf_linker_section_pointers *next;
1762 /* offset of pointer from beginning of section */
1763 bfd_vma offset;
1764 /* addend used */
1765 bfd_vma addend;
1766 /* which linker section this is */
1767 elf_linker_section_t *lsect;
1768 } elf_linker_section_pointers_t;
1769
1770 struct ppc_elf_obj_tdata
1771 {
1772 struct elf_obj_tdata elf;
1773
1774 /* A mapping from local symbols to offsets into the various linker
1775 sections added. This is index by the symbol index. */
1776 elf_linker_section_pointers_t **linker_section_pointers;
1777
1778 /* Flags used to auto-detect plt type. */
1779 unsigned int makes_plt_call : 1;
1780 unsigned int has_rel16 : 1;
1781 };
1782
1783 #define ppc_elf_tdata(bfd) \
1784 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1785
1786 #define elf_local_ptr_offsets(bfd) \
1787 (ppc_elf_tdata (bfd)->linker_section_pointers)
1788
1789 #define is_ppc_elf(bfd) \
1790 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1791 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1792
1793 /* Override the generic function because we store some extras. */
1794
1795 static bfd_boolean
1796 ppc_elf_mkobject (bfd *abfd)
1797 {
1798 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1799 PPC32_ELF_TDATA);
1800 }
1801
1802 /* Fix bad default arch selected for a 32 bit input bfd when the
1803 default is 64 bit. */
1804
1805 static bfd_boolean
1806 ppc_elf_object_p (bfd *abfd)
1807 {
1808 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1809 {
1810 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1811
1812 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1813 {
1814 /* Relies on arch after 64 bit default being 32 bit default. */
1815 abfd->arch_info = abfd->arch_info->next;
1816 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1817 }
1818 }
1819 return TRUE;
1820 }
1821
1822 /* Function to set whether a module needs the -mrelocatable bit set. */
1823
1824 static bfd_boolean
1825 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1826 {
1827 BFD_ASSERT (!elf_flags_init (abfd)
1828 || elf_elfheader (abfd)->e_flags == flags);
1829
1830 elf_elfheader (abfd)->e_flags = flags;
1831 elf_flags_init (abfd) = TRUE;
1832 return TRUE;
1833 }
1834
1835 /* Support for core dump NOTE sections. */
1836
1837 static bfd_boolean
1838 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1839 {
1840 int offset;
1841 unsigned int size;
1842
1843 switch (note->descsz)
1844 {
1845 default:
1846 return FALSE;
1847
1848 case 268: /* Linux/PPC. */
1849 /* pr_cursig */
1850 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1851
1852 /* pr_pid */
1853 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1854
1855 /* pr_reg */
1856 offset = 72;
1857 size = 192;
1858
1859 break;
1860 }
1861
1862 /* Make a ".reg/999" section. */
1863 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1864 size, note->descpos + offset);
1865 }
1866
1867 static bfd_boolean
1868 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1869 {
1870 switch (note->descsz)
1871 {
1872 default:
1873 return FALSE;
1874
1875 case 128: /* Linux/PPC elf_prpsinfo. */
1876 elf_tdata (abfd)->core_program
1877 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1878 elf_tdata (abfd)->core_command
1879 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1880 }
1881
1882 /* Note that for some reason, a spurious space is tacked
1883 onto the end of the args in some (at least one anyway)
1884 implementations, so strip it off if it exists. */
1885
1886 {
1887 char *command = elf_tdata (abfd)->core_command;
1888 int n = strlen (command);
1889
1890 if (0 < n && command[n - 1] == ' ')
1891 command[n - 1] = '\0';
1892 }
1893
1894 return TRUE;
1895 }
1896
1897 static char *
1898 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1899 {
1900 switch (note_type)
1901 {
1902 default:
1903 return NULL;
1904
1905 case NT_PRPSINFO:
1906 {
1907 char data[128];
1908 va_list ap;
1909
1910 va_start (ap, note_type);
1911 memset (data, 0, 32);
1912 strncpy (data + 32, va_arg (ap, const char *), 16);
1913 strncpy (data + 48, va_arg (ap, const char *), 80);
1914 va_end (ap);
1915 return elfcore_write_note (abfd, buf, bufsiz,
1916 "CORE", note_type, data, sizeof (data));
1917 }
1918
1919 case NT_PRSTATUS:
1920 {
1921 char data[268];
1922 va_list ap;
1923 long pid;
1924 int cursig;
1925 const void *greg;
1926
1927 va_start (ap, note_type);
1928 memset (data, 0, 72);
1929 pid = va_arg (ap, long);
1930 bfd_put_32 (abfd, pid, data + 24);
1931 cursig = va_arg (ap, int);
1932 bfd_put_16 (abfd, cursig, data + 12);
1933 greg = va_arg (ap, const void *);
1934 memcpy (data + 72, greg, 192);
1935 memset (data + 264, 0, 4);
1936 va_end (ap);
1937 return elfcore_write_note (abfd, buf, bufsiz,
1938 "CORE", note_type, data, sizeof (data));
1939 }
1940 }
1941 }
1942
1943 /* Return address for Ith PLT stub in section PLT, for relocation REL
1944 or (bfd_vma) -1 if it should not be included. */
1945
1946 static bfd_vma
1947 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1948 const asection *plt ATTRIBUTE_UNUSED,
1949 const arelent *rel)
1950 {
1951 return rel->address;
1952 }
1953
1954 /* Handle a PowerPC specific section when reading an object file. This
1955 is called when bfd_section_from_shdr finds a section with an unknown
1956 type. */
1957
1958 static bfd_boolean
1959 ppc_elf_section_from_shdr (bfd *abfd,
1960 Elf_Internal_Shdr *hdr,
1961 const char *name,
1962 int shindex)
1963 {
1964 asection *newsect;
1965 flagword flags;
1966
1967 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1968 return FALSE;
1969
1970 newsect = hdr->bfd_section;
1971 flags = bfd_get_section_flags (abfd, newsect);
1972 if (hdr->sh_flags & SHF_EXCLUDE)
1973 flags |= SEC_EXCLUDE;
1974
1975 if (hdr->sh_type == SHT_ORDERED)
1976 flags |= SEC_SORT_ENTRIES;
1977
1978 bfd_set_section_flags (abfd, newsect, flags);
1979 return TRUE;
1980 }
1981
1982 /* Set up any other section flags and such that may be necessary. */
1983
1984 static bfd_boolean
1985 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1986 Elf_Internal_Shdr *shdr,
1987 asection *asect)
1988 {
1989 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1990 shdr->sh_flags |= SHF_EXCLUDE;
1991
1992 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1993 shdr->sh_type = SHT_ORDERED;
1994
1995 return TRUE;
1996 }
1997
1998 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1999 need to bump up the number of section headers. */
2000
2001 static int
2002 ppc_elf_additional_program_headers (bfd *abfd,
2003 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2004 {
2005 asection *s;
2006 int ret = 0;
2007
2008 s = bfd_get_section_by_name (abfd, ".sbss2");
2009 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2010 ++ret;
2011
2012 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2013 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2014 ++ret;
2015
2016 return ret;
2017 }
2018
2019 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2020 .PPC.EMB.sbss0 a normal section, and not a bss section so
2021 that the linker doesn't crater when trying to make more than
2022 2 sections. */
2023
2024 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2025 {
2026 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2027 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2028 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2029 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2030 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2031 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2032 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2033 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2034 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2035 { NULL, 0, 0, 0, 0 }
2036 };
2037
2038 /* This is what we want for new plt/got. */
2039 static struct bfd_elf_special_section ppc_alt_plt =
2040 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2041
2042 static const struct bfd_elf_special_section *
2043 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2044 {
2045 const struct bfd_elf_special_section *ssect;
2046
2047 /* See if this is one of the special sections. */
2048 if (sec->name == NULL)
2049 return NULL;
2050
2051 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2052 sec->use_rela_p);
2053 if (ssect != NULL)
2054 {
2055 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2056 ssect = &ppc_alt_plt;
2057 return ssect;
2058 }
2059
2060 return _bfd_elf_get_sec_type_attr (abfd, sec);
2061 }
2062 \f
2063 /* Very simple linked list structure for recording apuinfo values. */
2064 typedef struct apuinfo_list
2065 {
2066 struct apuinfo_list *next;
2067 unsigned long value;
2068 }
2069 apuinfo_list;
2070
2071 static apuinfo_list *head;
2072
2073
2074 static void
2075 apuinfo_list_init (void)
2076 {
2077 head = NULL;
2078 }
2079
2080 static void
2081 apuinfo_list_add (unsigned long value)
2082 {
2083 apuinfo_list *entry = head;
2084
2085 while (entry != NULL)
2086 {
2087 if (entry->value == value)
2088 return;
2089 entry = entry->next;
2090 }
2091
2092 entry = bfd_malloc (sizeof (* entry));
2093 if (entry == NULL)
2094 return;
2095
2096 entry->value = value;
2097 entry->next = head;
2098 head = entry;
2099 }
2100
2101 static unsigned
2102 apuinfo_list_length (void)
2103 {
2104 apuinfo_list *entry;
2105 unsigned long count;
2106
2107 for (entry = head, count = 0;
2108 entry;
2109 entry = entry->next)
2110 ++ count;
2111
2112 return count;
2113 }
2114
2115 static inline unsigned long
2116 apuinfo_list_element (unsigned long number)
2117 {
2118 apuinfo_list * entry;
2119
2120 for (entry = head;
2121 entry && number --;
2122 entry = entry->next)
2123 ;
2124
2125 return entry ? entry->value : 0;
2126 }
2127
2128 static void
2129 apuinfo_list_finish (void)
2130 {
2131 apuinfo_list *entry;
2132
2133 for (entry = head; entry;)
2134 {
2135 apuinfo_list *next = entry->next;
2136 free (entry);
2137 entry = next;
2138 }
2139
2140 head = NULL;
2141 }
2142
2143 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2144 #define APUINFO_LABEL "APUinfo"
2145
2146 /* Scan the input BFDs and create a linked list of
2147 the APUinfo values that will need to be emitted. */
2148
2149 static void
2150 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2151 {
2152 bfd *ibfd;
2153 asection *asec;
2154 char *buffer;
2155 unsigned num_input_sections;
2156 bfd_size_type output_section_size;
2157 unsigned i;
2158 unsigned num_entries;
2159 unsigned long offset;
2160 unsigned long length;
2161 const char *error_message = NULL;
2162
2163 if (link_info == NULL)
2164 return;
2165
2166 /* Scan the input bfds, looking for apuinfo sections. */
2167 num_input_sections = 0;
2168 output_section_size = 0;
2169
2170 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2171 {
2172 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2173 if (asec)
2174 {
2175 ++ num_input_sections;
2176 output_section_size += asec->size;
2177 }
2178 }
2179
2180 /* We need at least one input sections
2181 in order to make merging worthwhile. */
2182 if (num_input_sections < 1)
2183 return;
2184
2185 /* Just make sure that the output section exists as well. */
2186 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2187 if (asec == NULL)
2188 return;
2189
2190 /* Allocate a buffer for the contents of the input sections. */
2191 buffer = bfd_malloc (output_section_size);
2192 if (buffer == NULL)
2193 return;
2194
2195 offset = 0;
2196 apuinfo_list_init ();
2197
2198 /* Read in the input sections contents. */
2199 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2200 {
2201 unsigned long datum;
2202 char *ptr;
2203
2204 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2205 if (asec == NULL)
2206 continue;
2207
2208 length = asec->size;
2209 if (length < 24)
2210 {
2211 error_message = _("corrupt or empty %s section in %B");
2212 goto fail;
2213 }
2214
2215 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2216 || (bfd_bread (buffer + offset, length, ibfd) != length))
2217 {
2218 error_message = _("unable to read in %s section from %B");
2219 goto fail;
2220 }
2221
2222 /* Process the contents of the section. */
2223 ptr = buffer + offset;
2224 error_message = _("corrupt %s section in %B");
2225
2226 /* Verify the contents of the header. Note - we have to
2227 extract the values this way in order to allow for a
2228 host whose endian-ness is different from the target. */
2229 datum = bfd_get_32 (ibfd, ptr);
2230 if (datum != sizeof APUINFO_LABEL)
2231 goto fail;
2232
2233 datum = bfd_get_32 (ibfd, ptr + 8);
2234 if (datum != 0x2)
2235 goto fail;
2236
2237 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2238 goto fail;
2239
2240 /* Get the number of bytes used for apuinfo entries. */
2241 datum = bfd_get_32 (ibfd, ptr + 4);
2242 if (datum + 20 != length)
2243 goto fail;
2244
2245 /* Make sure that we do not run off the end of the section. */
2246 if (offset + length > output_section_size)
2247 goto fail;
2248
2249 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2250 for (i = 0; i < datum; i += 4)
2251 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2252
2253 /* Update the offset. */
2254 offset += length;
2255 }
2256
2257 error_message = NULL;
2258
2259 /* Compute the size of the output section. */
2260 num_entries = apuinfo_list_length ();
2261 output_section_size = 20 + num_entries * 4;
2262
2263 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2264
2265 if (! bfd_set_section_size (abfd, asec, output_section_size))
2266 ibfd = abfd,
2267 error_message = _("warning: unable to set size of %s section in %B");
2268
2269 fail:
2270 free (buffer);
2271
2272 if (error_message)
2273 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2274 }
2275
2276 /* Prevent the output section from accumulating the input sections'
2277 contents. We have already stored this in our linked list structure. */
2278
2279 static bfd_boolean
2280 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2281 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2282 asection *asec,
2283 bfd_byte *contents ATTRIBUTE_UNUSED)
2284 {
2285 return (apuinfo_list_length ()
2286 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2287 }
2288
2289 /* Finally we can generate the output section. */
2290
2291 static void
2292 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2293 {
2294 bfd_byte *buffer;
2295 asection *asec;
2296 unsigned i;
2297 unsigned num_entries;
2298 bfd_size_type length;
2299
2300 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2301 if (asec == NULL)
2302 return;
2303
2304 if (apuinfo_list_length () == 0)
2305 return;
2306
2307 length = asec->size;
2308 if (length < 20)
2309 return;
2310
2311 buffer = bfd_malloc (length);
2312 if (buffer == NULL)
2313 {
2314 (*_bfd_error_handler)
2315 (_("failed to allocate space for new APUinfo section."));
2316 return;
2317 }
2318
2319 /* Create the apuinfo header. */
2320 num_entries = apuinfo_list_length ();
2321 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2322 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2323 bfd_put_32 (abfd, 0x2, buffer + 8);
2324 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2325
2326 length = 20;
2327 for (i = 0; i < num_entries; i++)
2328 {
2329 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2330 length += 4;
2331 }
2332
2333 if (length != asec->size)
2334 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2335
2336 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2337 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2338
2339 free (buffer);
2340
2341 apuinfo_list_finish ();
2342 }
2343 \f
2344 static bfd_boolean
2345 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2346 {
2347 bfd_byte buf[GLINK_ENTRY_SIZE];
2348
2349 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2350 return FALSE;
2351
2352 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2353 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2354 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2355 && bfd_get_32 (abfd, buf + 12) == BCTR);
2356 }
2357
2358 static bfd_boolean
2359 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2360 {
2361 bfd_vma vma = *(bfd_vma *) ptr;
2362 return ((section->flags & SEC_ALLOC) != 0
2363 && section->vma <= vma
2364 && vma < section->vma + section->size);
2365 }
2366
2367 static long
2368 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2369 long dynsymcount, asymbol **dynsyms,
2370 asymbol **ret)
2371 {
2372 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2373 asection *plt, *relplt, *dynamic, *glink;
2374 bfd_vma glink_vma = 0;
2375 bfd_vma resolv_vma = 0;
2376 bfd_vma stub_vma;
2377 asymbol *s;
2378 arelent *p;
2379 long count, i;
2380 size_t size;
2381 char *names;
2382 bfd_byte buf[4];
2383
2384 *ret = NULL;
2385
2386 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2387 return 0;
2388
2389 if (dynsymcount <= 0)
2390 return 0;
2391
2392 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2393 if (relplt == NULL)
2394 return 0;
2395
2396 plt = bfd_get_section_by_name (abfd, ".plt");
2397 if (plt == NULL)
2398 return 0;
2399
2400 /* Call common code to handle old-style executable PLTs. */
2401 if (elf_section_flags (plt) & SHF_EXECINSTR)
2402 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2403 dynsymcount, dynsyms, ret);
2404
2405 /* If this object was prelinked, the prelinker stored the address
2406 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2407 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2408 if (dynamic != NULL)
2409 {
2410 bfd_byte *dynbuf, *extdyn, *extdynend;
2411 size_t extdynsize;
2412 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2413
2414 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2415 return -1;
2416
2417 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2418 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2419
2420 extdyn = dynbuf;
2421 extdynend = extdyn + dynamic->size;
2422 for (; extdyn < extdynend; extdyn += extdynsize)
2423 {
2424 Elf_Internal_Dyn dyn;
2425 (*swap_dyn_in) (abfd, extdyn, &dyn);
2426
2427 if (dyn.d_tag == DT_NULL)
2428 break;
2429
2430 if (dyn.d_tag == DT_PPC_GOT)
2431 {
2432 unsigned int g_o_t = dyn.d_un.d_val;
2433 asection *got = bfd_get_section_by_name (abfd, ".got");
2434 if (got != NULL
2435 && bfd_get_section_contents (abfd, got, buf,
2436 g_o_t - got->vma + 4, 4))
2437 glink_vma = bfd_get_32 (abfd, buf);
2438 break;
2439 }
2440 }
2441 free (dynbuf);
2442 }
2443
2444 /* Otherwise we read the first plt entry. */
2445 if (glink_vma == 0)
2446 {
2447 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2448 glink_vma = bfd_get_32 (abfd, buf);
2449 }
2450
2451 if (glink_vma == 0)
2452 return 0;
2453
2454 /* The .glink section usually does not survive the final
2455 link; search for the section (usually .text) where the
2456 glink stubs now reside. */
2457 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2458 if (glink == NULL)
2459 return 0;
2460
2461 /* Determine glink PLT resolver by reading the relative branch
2462 from the first glink stub. */
2463 if (bfd_get_section_contents (abfd, glink, buf,
2464 glink_vma - glink->vma, 4))
2465 {
2466 unsigned int insn = bfd_get_32 (abfd, buf);
2467
2468 /* The first glink stub may either branch to the resolver ... */
2469 insn ^= B;
2470 if ((insn & ~0x3fffffc) == 0)
2471 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2472
2473 /* ... or fall through a bunch of NOPs. */
2474 else if ((insn ^ B ^ NOP) == 0)
2475 for (i = 4;
2476 bfd_get_section_contents (abfd, glink, buf,
2477 glink_vma - glink->vma + i, 4);
2478 i += 4)
2479 if (bfd_get_32 (abfd, buf) != NOP)
2480 {
2481 resolv_vma = glink_vma + i;
2482 break;
2483 }
2484 }
2485
2486 count = relplt->size / sizeof (Elf32_External_Rela);
2487 stub_vma = glink_vma - (bfd_vma) count * 16;
2488 /* If the stubs are those for -shared/-pie then we might have
2489 multiple stubs for each plt entry. If that is the case then
2490 there is no way to associate stubs with their plt entries short
2491 of figuring out the GOT pointer value used in the stub. */
2492 if (!is_nonpic_glink_stub (abfd, glink,
2493 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2494 return 0;
2495
2496 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2497 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2498 return -1;
2499
2500 size = count * sizeof (asymbol);
2501 p = relplt->relocation;
2502 for (i = 0; i < count; i++, p++)
2503 {
2504 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2505 if (p->addend != 0)
2506 size += sizeof ("+0x") - 1 + 8;
2507 }
2508
2509 size += sizeof (asymbol) + sizeof ("__glink");
2510
2511 if (resolv_vma)
2512 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2513
2514 s = *ret = bfd_malloc (size);
2515 if (s == NULL)
2516 return -1;
2517
2518 names = (char *) (s + count + 1 + (resolv_vma != 0));
2519 p = relplt->relocation;
2520 for (i = 0; i < count; i++, p++)
2521 {
2522 size_t len;
2523
2524 *s = **p->sym_ptr_ptr;
2525 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2526 we are defining a symbol, ensure one of them is set. */
2527 if ((s->flags & BSF_LOCAL) == 0)
2528 s->flags |= BSF_GLOBAL;
2529 s->flags |= BSF_SYNTHETIC;
2530 s->section = glink;
2531 s->value = stub_vma - glink->vma;
2532 s->name = names;
2533 s->udata.p = NULL;
2534 len = strlen ((*p->sym_ptr_ptr)->name);
2535 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2536 names += len;
2537 if (p->addend != 0)
2538 {
2539 memcpy (names, "+0x", sizeof ("+0x") - 1);
2540 names += sizeof ("+0x") - 1;
2541 bfd_sprintf_vma (abfd, names, p->addend);
2542 names += strlen (names);
2543 }
2544 memcpy (names, "@plt", sizeof ("@plt"));
2545 names += sizeof ("@plt");
2546 ++s;
2547 stub_vma += 16;
2548 }
2549
2550 /* Add a symbol at the start of the glink branch table. */
2551 memset (s, 0, sizeof *s);
2552 s->the_bfd = abfd;
2553 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2554 s->section = glink;
2555 s->value = glink_vma - glink->vma;
2556 s->name = names;
2557 memcpy (names, "__glink", sizeof ("__glink"));
2558 names += sizeof ("__glink");
2559 s++;
2560 count++;
2561
2562 if (resolv_vma)
2563 {
2564 /* Add a symbol for the glink PLT resolver. */
2565 memset (s, 0, sizeof *s);
2566 s->the_bfd = abfd;
2567 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2568 s->section = glink;
2569 s->value = resolv_vma - glink->vma;
2570 s->name = names;
2571 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2572 names += sizeof ("__glink_PLTresolve");
2573 s++;
2574 count++;
2575 }
2576
2577 return count;
2578 }
2579 \f
2580 /* The following functions are specific to the ELF linker, while
2581 functions above are used generally. They appear in this file more
2582 or less in the order in which they are called. eg.
2583 ppc_elf_check_relocs is called early in the link process,
2584 ppc_elf_finish_dynamic_sections is one of the last functions
2585 called. */
2586
2587 /* The PPC linker needs to keep track of the number of relocs that it
2588 decides to copy as dynamic relocs in check_relocs for each symbol.
2589 This is so that it can later discard them if they are found to be
2590 unnecessary. We store the information in a field extending the
2591 regular ELF linker hash table. */
2592
2593 struct ppc_elf_dyn_relocs
2594 {
2595 struct ppc_elf_dyn_relocs *next;
2596
2597 /* The input section of the reloc. */
2598 asection *sec;
2599
2600 /* Total number of relocs copied for the input section. */
2601 bfd_size_type count;
2602
2603 /* Number of pc-relative relocs copied for the input section. */
2604 bfd_size_type pc_count;
2605 };
2606
2607 /* Track PLT entries needed for a given symbol. We might need more
2608 than one glink entry per symbol when generating a pic binary. */
2609 struct plt_entry
2610 {
2611 struct plt_entry *next;
2612
2613 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2614 This field stores the offset into .got2 used to initialise the
2615 GOT pointer reg. It will always be at least 32768. (Current
2616 gcc always uses an offset of 32768, but ld -r will pack .got2
2617 sections together resulting in larger offsets). */
2618 bfd_vma addend;
2619
2620 /* The .got2 section. */
2621 asection *sec;
2622
2623 /* PLT refcount or offset. */
2624 union
2625 {
2626 bfd_signed_vma refcount;
2627 bfd_vma offset;
2628 } plt;
2629
2630 /* .glink stub offset. */
2631 bfd_vma glink_offset;
2632 };
2633
2634 /* Of those relocs that might be copied as dynamic relocs, this function
2635 selects those that must be copied when linking a shared library,
2636 even when the symbol is local. */
2637
2638 static int
2639 must_be_dyn_reloc (struct bfd_link_info *info,
2640 enum elf_ppc_reloc_type r_type)
2641 {
2642 switch (r_type)
2643 {
2644 default:
2645 return 1;
2646
2647 case R_PPC_REL24:
2648 case R_PPC_REL14:
2649 case R_PPC_REL14_BRTAKEN:
2650 case R_PPC_REL14_BRNTAKEN:
2651 case R_PPC_REL32:
2652 return 0;
2653
2654 case R_PPC_TPREL32:
2655 case R_PPC_TPREL16:
2656 case R_PPC_TPREL16_LO:
2657 case R_PPC_TPREL16_HI:
2658 case R_PPC_TPREL16_HA:
2659 return !info->executable;
2660 }
2661 }
2662
2663 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2664 copying dynamic variables from a shared lib into an app's dynbss
2665 section, and instead use a dynamic relocation to point into the
2666 shared lib. */
2667 #define ELIMINATE_COPY_RELOCS 1
2668
2669 /* PPC ELF linker hash entry. */
2670
2671 struct ppc_elf_link_hash_entry
2672 {
2673 struct elf_link_hash_entry elf;
2674
2675 /* If this symbol is used in the linker created sections, the processor
2676 specific backend uses this field to map the field into the offset
2677 from the beginning of the section. */
2678 elf_linker_section_pointers_t *linker_section_pointer;
2679
2680 /* Track dynamic relocs copied for this symbol. */
2681 struct ppc_elf_dyn_relocs *dyn_relocs;
2682
2683 /* Contexts in which symbol is used in the GOT (or TOC).
2684 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2685 corresponding relocs are encountered during check_relocs.
2686 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2687 indicate the corresponding GOT entry type is not needed. */
2688 #define TLS_GD 1 /* GD reloc. */
2689 #define TLS_LD 2 /* LD reloc. */
2690 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2691 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2692 #define TLS_TLS 16 /* Any TLS reloc. */
2693 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2694 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2695 char tls_mask;
2696
2697 /* Nonzero if we have seen a small data relocation referring to this
2698 symbol. */
2699 unsigned char has_sda_refs;
2700 };
2701
2702 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2703
2704 /* PPC ELF linker hash table. */
2705
2706 struct ppc_elf_link_hash_table
2707 {
2708 struct elf_link_hash_table elf;
2709
2710 /* Short-cuts to get to dynamic linker sections. */
2711 asection *got;
2712 asection *relgot;
2713 asection *glink;
2714 asection *plt;
2715 asection *relplt;
2716 asection *iplt;
2717 asection *reliplt;
2718 asection *dynbss;
2719 asection *relbss;
2720 asection *dynsbss;
2721 asection *relsbss;
2722 elf_linker_section_t sdata[2];
2723 asection *sbss;
2724
2725 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2726 asection *srelplt2;
2727
2728 /* The .got.plt section (VxWorks only)*/
2729 asection *sgotplt;
2730
2731 /* Shortcut to __tls_get_addr. */
2732 struct elf_link_hash_entry *tls_get_addr;
2733
2734 /* The bfd that forced an old-style PLT. */
2735 bfd *old_bfd;
2736
2737 /* TLS local dynamic got entry handling. */
2738 union {
2739 bfd_signed_vma refcount;
2740 bfd_vma offset;
2741 } tlsld_got;
2742
2743 /* Offset of branch table to PltResolve function in glink. */
2744 bfd_vma glink_pltresolve;
2745
2746 /* Size of reserved GOT entries. */
2747 unsigned int got_header_size;
2748 /* Non-zero if allocating the header left a gap. */
2749 unsigned int got_gap;
2750
2751 /* The type of PLT we have chosen to use. */
2752 enum ppc_elf_plt_type plt_type;
2753
2754 /* Set if we should emit symbols for stubs. */
2755 unsigned int emit_stub_syms:1;
2756
2757 /* True if the target system is VxWorks. */
2758 unsigned int is_vxworks:1;
2759
2760 /* The size of PLT entries. */
2761 int plt_entry_size;
2762 /* The distance between adjacent PLT slots. */
2763 int plt_slot_size;
2764 /* The size of the first PLT entry. */
2765 int plt_initial_entry_size;
2766
2767 /* Small local sym cache. */
2768 struct sym_cache sym_cache;
2769 };
2770
2771 /* Get the PPC ELF linker hash table from a link_info structure. */
2772
2773 #define ppc_elf_hash_table(p) \
2774 ((struct ppc_elf_link_hash_table *) (p)->hash)
2775
2776 /* Create an entry in a PPC ELF linker hash table. */
2777
2778 static struct bfd_hash_entry *
2779 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2780 struct bfd_hash_table *table,
2781 const char *string)
2782 {
2783 /* Allocate the structure if it has not already been allocated by a
2784 subclass. */
2785 if (entry == NULL)
2786 {
2787 entry = bfd_hash_allocate (table,
2788 sizeof (struct ppc_elf_link_hash_entry));
2789 if (entry == NULL)
2790 return entry;
2791 }
2792
2793 /* Call the allocation method of the superclass. */
2794 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2795 if (entry != NULL)
2796 {
2797 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2798 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2799 ppc_elf_hash_entry (entry)->tls_mask = 0;
2800 }
2801
2802 return entry;
2803 }
2804
2805 /* Create a PPC ELF linker hash table. */
2806
2807 static struct bfd_link_hash_table *
2808 ppc_elf_link_hash_table_create (bfd *abfd)
2809 {
2810 struct ppc_elf_link_hash_table *ret;
2811
2812 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2813 if (ret == NULL)
2814 return NULL;
2815
2816 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2817 ppc_elf_link_hash_newfunc,
2818 sizeof (struct ppc_elf_link_hash_entry)))
2819 {
2820 free (ret);
2821 return NULL;
2822 }
2823
2824 ret->elf.init_plt_refcount.refcount = 0;
2825 ret->elf.init_plt_refcount.glist = NULL;
2826 ret->elf.init_plt_offset.offset = 0;
2827 ret->elf.init_plt_offset.glist = NULL;
2828
2829 ret->sdata[0].name = ".sdata";
2830 ret->sdata[0].sym_name = "_SDA_BASE_";
2831 ret->sdata[0].bss_name = ".sbss";
2832
2833 ret->sdata[1].name = ".sdata2";
2834 ret->sdata[1].sym_name = "_SDA2_BASE_";
2835 ret->sdata[1].bss_name = ".sbss2";
2836
2837 ret->plt_entry_size = 12;
2838 ret->plt_slot_size = 8;
2839 ret->plt_initial_entry_size = 72;
2840
2841 return &ret->elf.root;
2842 }
2843
2844 /* Create .got and the related sections. */
2845
2846 static bfd_boolean
2847 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2848 {
2849 struct ppc_elf_link_hash_table *htab;
2850 asection *s;
2851 flagword flags;
2852
2853 if (!_bfd_elf_create_got_section (abfd, info))
2854 return FALSE;
2855
2856 htab = ppc_elf_hash_table (info);
2857 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2858 if (s == NULL)
2859 abort ();
2860
2861 if (htab->is_vxworks)
2862 {
2863 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2864 if (!htab->sgotplt)
2865 abort ();
2866 }
2867 else
2868 {
2869 /* The powerpc .got has a blrl instruction in it. Mark it
2870 executable. */
2871 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2872 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2873 if (!bfd_set_section_flags (abfd, s, flags))
2874 return FALSE;
2875 }
2876
2877 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2878 if (!htab->relgot)
2879 abort ();
2880
2881 return TRUE;
2882 }
2883
2884 static bfd_boolean
2885 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2886 {
2887 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2888 asection *s;
2889 flagword flags;
2890
2891 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2892 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2893 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2894 htab->glink = s;
2895 if (s == NULL
2896 || !bfd_set_section_alignment (abfd, s, 4))
2897 return FALSE;
2898
2899 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2900 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2901 htab->iplt = s;
2902 if (s == NULL
2903 || !bfd_set_section_alignment (abfd, s, 4))
2904 return FALSE;
2905
2906 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2907 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2908 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2909 htab->reliplt = s;
2910 if (s == NULL
2911 || ! bfd_set_section_alignment (abfd, s, 2))
2912 return FALSE;
2913 return TRUE;
2914 }
2915
2916 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2917 to output sections (just like _bfd_elf_create_dynamic_sections has
2918 to create .dynbss and .rela.bss). */
2919
2920 static bfd_boolean
2921 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2922 {
2923 struct ppc_elf_link_hash_table *htab;
2924 asection *s;
2925 flagword flags;
2926
2927 htab = ppc_elf_hash_table (info);
2928
2929 if (htab->got == NULL
2930 && !ppc_elf_create_got (abfd, info))
2931 return FALSE;
2932
2933 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2934 return FALSE;
2935
2936 if (htab->glink == NULL
2937 && !ppc_elf_create_glink (abfd, info))
2938 return FALSE;
2939
2940 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2941 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2942 SEC_ALLOC | SEC_LINKER_CREATED);
2943 htab->dynsbss = s;
2944 if (s == NULL)
2945 return FALSE;
2946
2947 if (! info->shared)
2948 {
2949 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2950 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2951 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2952 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2953 htab->relsbss = s;
2954 if (s == NULL
2955 || ! bfd_set_section_alignment (abfd, s, 2))
2956 return FALSE;
2957 }
2958
2959 if (htab->is_vxworks
2960 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2961 return FALSE;
2962
2963 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2964 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2965 if (s == NULL)
2966 abort ();
2967
2968 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2969 if (htab->plt_type == PLT_VXWORKS)
2970 /* The VxWorks PLT is a loaded section with contents. */
2971 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2972 return bfd_set_section_flags (abfd, s, flags);
2973 }
2974
2975 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2976
2977 static void
2978 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2979 struct elf_link_hash_entry *dir,
2980 struct elf_link_hash_entry *ind)
2981 {
2982 struct ppc_elf_link_hash_entry *edir, *eind;
2983
2984 edir = (struct ppc_elf_link_hash_entry *) dir;
2985 eind = (struct ppc_elf_link_hash_entry *) ind;
2986
2987 if (eind->dyn_relocs != NULL)
2988 {
2989 if (edir->dyn_relocs != NULL)
2990 {
2991 struct ppc_elf_dyn_relocs **pp;
2992 struct ppc_elf_dyn_relocs *p;
2993
2994 /* Add reloc counts against the indirect sym to the direct sym
2995 list. Merge any entries against the same section. */
2996 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2997 {
2998 struct ppc_elf_dyn_relocs *q;
2999
3000 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3001 if (q->sec == p->sec)
3002 {
3003 q->pc_count += p->pc_count;
3004 q->count += p->count;
3005 *pp = p->next;
3006 break;
3007 }
3008 if (q == NULL)
3009 pp = &p->next;
3010 }
3011 *pp = edir->dyn_relocs;
3012 }
3013
3014 edir->dyn_relocs = eind->dyn_relocs;
3015 eind->dyn_relocs = NULL;
3016 }
3017
3018 edir->tls_mask |= eind->tls_mask;
3019 edir->has_sda_refs |= eind->has_sda_refs;
3020
3021 /* If called to transfer flags for a weakdef during processing
3022 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3023 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3024 if (!(ELIMINATE_COPY_RELOCS
3025 && eind->elf.root.type != bfd_link_hash_indirect
3026 && edir->elf.dynamic_adjusted))
3027 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3028
3029 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3030 edir->elf.ref_regular |= eind->elf.ref_regular;
3031 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3032 edir->elf.needs_plt |= eind->elf.needs_plt;
3033 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3034
3035 /* If we were called to copy over info for a weak sym, that's all. */
3036 if (eind->elf.root.type != bfd_link_hash_indirect)
3037 return;
3038
3039 /* Copy over the GOT refcount entries that we may have already seen to
3040 the symbol which just became indirect. */
3041 edir->elf.got.refcount += eind->elf.got.refcount;
3042 eind->elf.got.refcount = 0;
3043
3044 /* And plt entries. */
3045 if (eind->elf.plt.plist != NULL)
3046 {
3047 if (edir->elf.plt.plist != NULL)
3048 {
3049 struct plt_entry **entp;
3050 struct plt_entry *ent;
3051
3052 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3053 {
3054 struct plt_entry *dent;
3055
3056 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3057 if (dent->sec == ent->sec && dent->addend == ent->addend)
3058 {
3059 dent->plt.refcount += ent->plt.refcount;
3060 *entp = ent->next;
3061 break;
3062 }
3063 if (dent == NULL)
3064 entp = &ent->next;
3065 }
3066 *entp = edir->elf.plt.plist;
3067 }
3068
3069 edir->elf.plt.plist = eind->elf.plt.plist;
3070 eind->elf.plt.plist = NULL;
3071 }
3072
3073 if (eind->elf.dynindx != -1)
3074 {
3075 if (edir->elf.dynindx != -1)
3076 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3077 edir->elf.dynstr_index);
3078 edir->elf.dynindx = eind->elf.dynindx;
3079 edir->elf.dynstr_index = eind->elf.dynstr_index;
3080 eind->elf.dynindx = -1;
3081 eind->elf.dynstr_index = 0;
3082 }
3083 }
3084
3085 /* Hook called by the linker routine which adds symbols from an object
3086 file. We use it to put .comm items in .sbss, and not .bss. */
3087
3088 static bfd_boolean
3089 ppc_elf_add_symbol_hook (bfd *abfd,
3090 struct bfd_link_info *info,
3091 Elf_Internal_Sym *sym,
3092 const char **namep ATTRIBUTE_UNUSED,
3093 flagword *flagsp ATTRIBUTE_UNUSED,
3094 asection **secp,
3095 bfd_vma *valp)
3096 {
3097 if (sym->st_shndx == SHN_COMMON
3098 && !info->relocatable
3099 && is_ppc_elf (info->output_bfd)
3100 && sym->st_size <= elf_gp_size (abfd))
3101 {
3102 /* Common symbols less than or equal to -G nn bytes are automatically
3103 put into .sbss. */
3104 struct ppc_elf_link_hash_table *htab;
3105
3106 htab = ppc_elf_hash_table (info);
3107 if (htab->sbss == NULL)
3108 {
3109 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3110
3111 if (!htab->elf.dynobj)
3112 htab->elf.dynobj = abfd;
3113
3114 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3115 ".sbss",
3116 flags);
3117 if (htab->sbss == NULL)
3118 return FALSE;
3119 }
3120
3121 *secp = htab->sbss;
3122 *valp = sym->st_size;
3123 }
3124
3125 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3126 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3127
3128 return TRUE;
3129 }
3130 \f
3131 static bfd_boolean
3132 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3133 {
3134 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3135
3136 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3137 TRUE, FALSE, TRUE);
3138 if (lsect->sym == NULL)
3139 return FALSE;
3140 if (lsect->sym->root.type == bfd_link_hash_new)
3141 lsect->sym->non_elf = 0;
3142 lsect->sym->ref_regular = 1;
3143 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3144 return TRUE;
3145 }
3146
3147 /* Create a special linker section. */
3148
3149 static bfd_boolean
3150 ppc_elf_create_linker_section (bfd *abfd,
3151 struct bfd_link_info *info,
3152 flagword flags,
3153 elf_linker_section_t *lsect)
3154 {
3155 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3156 asection *s;
3157
3158 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3159 | SEC_LINKER_CREATED);
3160
3161 /* Record the first bfd that needs the special sections. */
3162 if (!htab->elf.dynobj)
3163 htab->elf.dynobj = abfd;
3164
3165 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3166 lsect->name,
3167 flags);
3168 if (s == NULL
3169 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3170 return FALSE;
3171 lsect->section = s;
3172
3173 return create_sdata_sym (info, lsect);
3174 }
3175
3176 /* Find a linker generated pointer with a given addend and type. */
3177
3178 static elf_linker_section_pointers_t *
3179 elf_find_pointer_linker_section
3180 (elf_linker_section_pointers_t *linker_pointers,
3181 bfd_vma addend,
3182 elf_linker_section_t *lsect)
3183 {
3184 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3185 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3186 return linker_pointers;
3187
3188 return NULL;
3189 }
3190
3191 /* Allocate a pointer to live in a linker created section. */
3192
3193 static bfd_boolean
3194 elf_create_pointer_linker_section (bfd *abfd,
3195 elf_linker_section_t *lsect,
3196 struct elf_link_hash_entry *h,
3197 const Elf_Internal_Rela *rel)
3198 {
3199 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3200 elf_linker_section_pointers_t *linker_section_ptr;
3201 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3202 bfd_size_type amt;
3203
3204 BFD_ASSERT (lsect != NULL);
3205
3206 /* Is this a global symbol? */
3207 if (h != NULL)
3208 {
3209 struct ppc_elf_link_hash_entry *eh;
3210
3211 /* Has this symbol already been allocated? If so, our work is done. */
3212 eh = (struct ppc_elf_link_hash_entry *) h;
3213 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3214 rel->r_addend,
3215 lsect))
3216 return TRUE;
3217
3218 ptr_linker_section_ptr = &eh->linker_section_pointer;
3219 }
3220 else
3221 {
3222 BFD_ASSERT (is_ppc_elf (abfd));
3223
3224 /* Allocation of a pointer to a local symbol. */
3225 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3226
3227 /* Allocate a table to hold the local symbols if first time. */
3228 if (!ptr)
3229 {
3230 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3231
3232 amt = num_symbols;
3233 amt *= sizeof (elf_linker_section_pointers_t *);
3234 ptr = bfd_zalloc (abfd, amt);
3235
3236 if (!ptr)
3237 return FALSE;
3238
3239 elf_local_ptr_offsets (abfd) = ptr;
3240 }
3241
3242 /* Has this symbol already been allocated? If so, our work is done. */
3243 if (elf_find_pointer_linker_section (ptr[r_symndx],
3244 rel->r_addend,
3245 lsect))
3246 return TRUE;
3247
3248 ptr_linker_section_ptr = &ptr[r_symndx];
3249 }
3250
3251 /* Allocate space for a pointer in the linker section, and allocate
3252 a new pointer record from internal memory. */
3253 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3254 amt = sizeof (elf_linker_section_pointers_t);
3255 linker_section_ptr = bfd_alloc (abfd, amt);
3256
3257 if (!linker_section_ptr)
3258 return FALSE;
3259
3260 linker_section_ptr->next = *ptr_linker_section_ptr;
3261 linker_section_ptr->addend = rel->r_addend;
3262 linker_section_ptr->lsect = lsect;
3263 *ptr_linker_section_ptr = linker_section_ptr;
3264
3265 linker_section_ptr->offset = lsect->section->size;
3266 lsect->section->size += 4;
3267
3268 #ifdef DEBUG
3269 fprintf (stderr,
3270 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3271 lsect->name, (long) linker_section_ptr->offset,
3272 (long) lsect->section->size);
3273 #endif
3274
3275 return TRUE;
3276 }
3277
3278 static struct plt_entry **
3279 update_local_sym_info (bfd *abfd,
3280 Elf_Internal_Shdr *symtab_hdr,
3281 unsigned long r_symndx,
3282 int tls_type)
3283 {
3284 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3285 struct plt_entry **local_plt;
3286 char *local_got_tls_masks;
3287
3288 if (local_got_refcounts == NULL)
3289 {
3290 bfd_size_type size = symtab_hdr->sh_info;
3291
3292 size *= (sizeof (*local_got_refcounts)
3293 + sizeof (*local_plt)
3294 + sizeof (*local_got_tls_masks));
3295 local_got_refcounts = bfd_zalloc (abfd, size);
3296 if (local_got_refcounts == NULL)
3297 return NULL;
3298 elf_local_got_refcounts (abfd) = local_got_refcounts;
3299 }
3300
3301 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3302 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3303 local_got_tls_masks[r_symndx] |= tls_type;
3304 if (tls_type != PLT_IFUNC)
3305 local_got_refcounts[r_symndx] += 1;
3306 return local_plt + r_symndx;
3307 }
3308
3309 static bfd_boolean
3310 update_plt_info (bfd *abfd, struct plt_entry **plist,
3311 asection *sec, bfd_vma addend)
3312 {
3313 struct plt_entry *ent;
3314
3315 for (ent = *plist; ent != NULL; ent = ent->next)
3316 if (ent->sec == sec && ent->addend == addend)
3317 break;
3318 if (ent == NULL)
3319 {
3320 bfd_size_type amt = sizeof (*ent);
3321 ent = bfd_alloc (abfd, amt);
3322 if (ent == NULL)
3323 return FALSE;
3324 ent->next = *plist;
3325 ent->sec = sec;
3326 ent->addend = addend;
3327 ent->plt.refcount = 0;
3328 *plist = ent;
3329 }
3330 ent->plt.refcount += 1;
3331 return TRUE;
3332 }
3333
3334 static struct plt_entry *
3335 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3336 {
3337 struct plt_entry *ent;
3338
3339 if (addend < 32768)
3340 sec = NULL;
3341 for (ent = *plist; ent != NULL; ent = ent->next)
3342 if (ent->sec == sec && ent->addend == addend)
3343 break;
3344 return ent;
3345 }
3346
3347 static bfd_boolean
3348 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3349 {
3350 return (r_type == R_PPC_PLTREL24
3351 || r_type == R_PPC_LOCAL24PC
3352 || r_type == R_PPC_REL24
3353 || r_type == R_PPC_REL14
3354 || r_type == R_PPC_REL14_BRTAKEN
3355 || r_type == R_PPC_REL14_BRNTAKEN
3356 || r_type == R_PPC_ADDR24
3357 || r_type == R_PPC_ADDR14
3358 || r_type == R_PPC_ADDR14_BRTAKEN
3359 || r_type == R_PPC_ADDR14_BRNTAKEN);
3360 }
3361
3362 static void
3363 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3364 {
3365 (*_bfd_error_handler)
3366 (_("%B: relocation %s cannot be used when making a shared object"),
3367 abfd,
3368 ppc_elf_howto_table[r_type]->name);
3369 bfd_set_error (bfd_error_bad_value);
3370 }
3371
3372 /* Look through the relocs for a section during the first phase, and
3373 allocate space in the global offset table or procedure linkage
3374 table. */
3375
3376 static bfd_boolean
3377 ppc_elf_check_relocs (bfd *abfd,
3378 struct bfd_link_info *info,
3379 asection *sec,
3380 const Elf_Internal_Rela *relocs)
3381 {
3382 struct ppc_elf_link_hash_table *htab;
3383 Elf_Internal_Shdr *symtab_hdr;
3384 struct elf_link_hash_entry **sym_hashes;
3385 const Elf_Internal_Rela *rel;
3386 const Elf_Internal_Rela *rel_end;
3387 asection *got2, *sreloc;
3388 struct elf_link_hash_entry *tga;
3389
3390 if (info->relocatable)
3391 return TRUE;
3392
3393 /* Don't do anything special with non-loaded, non-alloced sections.
3394 In particular, any relocs in such sections should not affect GOT
3395 and PLT reference counting (ie. we don't allow them to create GOT
3396 or PLT entries), there's no possibility or desire to optimize TLS
3397 relocs, and there's not much point in propagating relocs to shared
3398 libs that the dynamic linker won't relocate. */
3399 if ((sec->flags & SEC_ALLOC) == 0)
3400 return TRUE;
3401
3402 #ifdef DEBUG
3403 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3404 sec, abfd);
3405 #endif
3406
3407 BFD_ASSERT (is_ppc_elf (abfd));
3408
3409 /* Initialize howto table if not already done. */
3410 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3411 ppc_elf_howto_init ();
3412
3413 htab = ppc_elf_hash_table (info);
3414 if (htab->glink == NULL)
3415 {
3416 if (htab->elf.dynobj == NULL)
3417 htab->elf.dynobj = abfd;
3418 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3419 return FALSE;
3420 }
3421 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3422 FALSE, FALSE, TRUE);
3423 symtab_hdr = &elf_symtab_hdr (abfd);
3424 sym_hashes = elf_sym_hashes (abfd);
3425 got2 = bfd_get_section_by_name (abfd, ".got2");
3426 sreloc = NULL;
3427
3428 rel_end = relocs + sec->reloc_count;
3429 for (rel = relocs; rel < rel_end; rel++)
3430 {
3431 unsigned long r_symndx;
3432 enum elf_ppc_reloc_type r_type;
3433 struct elf_link_hash_entry *h;
3434 int tls_type;
3435 struct plt_entry **ifunc;
3436
3437 r_symndx = ELF32_R_SYM (rel->r_info);
3438 if (r_symndx < symtab_hdr->sh_info)
3439 h = NULL;
3440 else
3441 {
3442 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3443 while (h->root.type == bfd_link_hash_indirect
3444 || h->root.type == bfd_link_hash_warning)
3445 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3446 }
3447
3448 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3449 This shows up in particular in an R_PPC_ADDR32 in the eabi
3450 startup code. */
3451 if (h != NULL
3452 && htab->got == NULL
3453 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3454 {
3455 if (htab->elf.dynobj == NULL)
3456 htab->elf.dynobj = abfd;
3457 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3458 return FALSE;
3459 BFD_ASSERT (h == htab->elf.hgot);
3460 }
3461
3462 tls_type = 0;
3463 ifunc = NULL;
3464 r_type = ELF32_R_TYPE (rel->r_info);
3465 if (!htab->is_vxworks)
3466 {
3467 if (h != NULL)
3468 {
3469 if (h->type == STT_GNU_IFUNC)
3470 ifunc = &h->plt.plist;
3471 }
3472 else
3473 {
3474 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3475 abfd, r_symndx);
3476 if (isym == NULL)
3477 return FALSE;
3478
3479 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3480 && (!info->shared
3481 || is_branch_reloc (r_type)))
3482 {
3483 bfd_vma addend;
3484
3485 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3486 PLT_IFUNC);
3487 if (ifunc == NULL)
3488 return FALSE;
3489
3490 /* STT_GNU_IFUNC symbols must have a PLT entry;
3491 In a non-pie executable even when there are
3492 no plt calls. */
3493 addend = 0;
3494 if (r_type == R_PPC_PLTREL24)
3495 {
3496 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3497 if (info->shared)
3498 addend = rel->r_addend;
3499 }
3500 if (!update_plt_info (abfd, ifunc,
3501 addend < 32768 ? NULL : got2, addend))
3502 return FALSE;
3503 }
3504 }
3505 }
3506
3507 if (!htab->is_vxworks
3508 && is_branch_reloc (r_type)
3509 && h != NULL
3510 && h == tga)
3511 {
3512 if (rel != relocs
3513 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3514 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3515 /* We have a new-style __tls_get_addr call with a marker
3516 reloc. */
3517 ;
3518 else
3519 /* Mark this section as having an old-style call. */
3520 sec->has_tls_get_addr_call = 1;
3521 }
3522
3523 switch (r_type)
3524 {
3525 case R_PPC_TLSGD:
3526 case R_PPC_TLSLD:
3527 /* These special tls relocs tie a call to __tls_get_addr with
3528 its parameter symbol. */
3529 break;
3530
3531 case R_PPC_GOT_TLSLD16:
3532 case R_PPC_GOT_TLSLD16_LO:
3533 case R_PPC_GOT_TLSLD16_HI:
3534 case R_PPC_GOT_TLSLD16_HA:
3535 tls_type = TLS_TLS | TLS_LD;
3536 goto dogottls;
3537
3538 case R_PPC_GOT_TLSGD16:
3539 case R_PPC_GOT_TLSGD16_LO:
3540 case R_PPC_GOT_TLSGD16_HI:
3541 case R_PPC_GOT_TLSGD16_HA:
3542 tls_type = TLS_TLS | TLS_GD;
3543 goto dogottls;
3544
3545 case R_PPC_GOT_TPREL16:
3546 case R_PPC_GOT_TPREL16_LO:
3547 case R_PPC_GOT_TPREL16_HI:
3548 case R_PPC_GOT_TPREL16_HA:
3549 if (!info->executable)
3550 info->flags |= DF_STATIC_TLS;
3551 tls_type = TLS_TLS | TLS_TPREL;
3552 goto dogottls;
3553
3554 case R_PPC_GOT_DTPREL16:
3555 case R_PPC_GOT_DTPREL16_LO:
3556 case R_PPC_GOT_DTPREL16_HI:
3557 case R_PPC_GOT_DTPREL16_HA:
3558 tls_type = TLS_TLS | TLS_DTPREL;
3559 dogottls:
3560 sec->has_tls_reloc = 1;
3561 /* Fall thru */
3562
3563 /* GOT16 relocations */
3564 case R_PPC_GOT16:
3565 case R_PPC_GOT16_LO:
3566 case R_PPC_GOT16_HI:
3567 case R_PPC_GOT16_HA:
3568 /* This symbol requires a global offset table entry. */
3569 if (htab->got == NULL)
3570 {
3571 if (htab->elf.dynobj == NULL)
3572 htab->elf.dynobj = abfd;
3573 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3574 return FALSE;
3575 }
3576 if (h != NULL)
3577 {
3578 h->got.refcount += 1;
3579 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3580 }
3581 else
3582 /* This is a global offset table entry for a local symbol. */
3583 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3584 return FALSE;
3585
3586 /* We may also need a plt entry if the symbol turns out to be
3587 an ifunc. */
3588 if (h != NULL && !info->shared)
3589 {
3590 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3591 return FALSE;
3592 }
3593 break;
3594
3595 /* Indirect .sdata relocation. */
3596 case R_PPC_EMB_SDAI16:
3597 if (info->shared)
3598 {
3599 bad_shared_reloc (abfd, r_type);
3600 return FALSE;
3601 }
3602 if (htab->sdata[0].section == NULL
3603 && !ppc_elf_create_linker_section (abfd, info, 0,
3604 &htab->sdata[0]))
3605 return FALSE;
3606 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3607 h, rel))
3608 return FALSE;
3609 if (h != NULL)
3610 {
3611 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3612 h->non_got_ref = TRUE;
3613 }
3614 break;
3615
3616 /* Indirect .sdata2 relocation. */
3617 case R_PPC_EMB_SDA2I16:
3618 if (info->shared)
3619 {
3620 bad_shared_reloc (abfd, r_type);
3621 return FALSE;
3622 }
3623 if (htab->sdata[1].section == NULL
3624 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3625 &htab->sdata[1]))
3626 return FALSE;
3627 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3628 h, rel))
3629 return FALSE;
3630 if (h != NULL)
3631 {
3632 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3633 h->non_got_ref = TRUE;
3634 }
3635 break;
3636
3637 case R_PPC_SDAREL16:
3638 if (htab->sdata[0].sym == NULL
3639 && !create_sdata_sym (info, &htab->sdata[0]))
3640 return FALSE;
3641 if (h != NULL)
3642 {
3643 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3644 h->non_got_ref = TRUE;
3645 }
3646 break;
3647
3648 case R_PPC_EMB_SDA2REL:
3649 if (info->shared)
3650 {
3651 bad_shared_reloc (abfd, r_type);
3652 return FALSE;
3653 }
3654 if (htab->sdata[1].sym == NULL
3655 && !create_sdata_sym (info, &htab->sdata[1]))
3656 return FALSE;
3657 if (h != NULL)
3658 {
3659 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3660 h->non_got_ref = TRUE;
3661 }
3662 break;
3663
3664 case R_PPC_EMB_SDA21:
3665 case R_PPC_EMB_RELSDA:
3666 if (info->shared)
3667 {
3668 bad_shared_reloc (abfd, r_type);
3669 return FALSE;
3670 }
3671 if (htab->sdata[0].sym == NULL
3672 && !create_sdata_sym (info, &htab->sdata[0]))
3673 return FALSE;
3674 if (htab->sdata[1].sym == NULL
3675 && !create_sdata_sym (info, &htab->sdata[1]))
3676 return FALSE;
3677 if (h != NULL)
3678 {
3679 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3680 h->non_got_ref = TRUE;
3681 }
3682 break;
3683
3684 case R_PPC_EMB_NADDR32:
3685 case R_PPC_EMB_NADDR16:
3686 case R_PPC_EMB_NADDR16_LO:
3687 case R_PPC_EMB_NADDR16_HI:
3688 case R_PPC_EMB_NADDR16_HA:
3689 if (info->shared)
3690 {
3691 bad_shared_reloc (abfd, r_type);
3692 return FALSE;
3693 }
3694 if (h != NULL)
3695 h->non_got_ref = TRUE;
3696 break;
3697
3698 case R_PPC_PLTREL24:
3699 if (h == NULL)
3700 break;
3701 /* Fall through */
3702 case R_PPC_PLT32:
3703 case R_PPC_PLTREL32:
3704 case R_PPC_PLT16_LO:
3705 case R_PPC_PLT16_HI:
3706 case R_PPC_PLT16_HA:
3707 #ifdef DEBUG
3708 fprintf (stderr, "Reloc requires a PLT entry\n");
3709 #endif
3710 /* This symbol requires a procedure linkage table entry. We
3711 actually build the entry in finish_dynamic_symbol,
3712 because this might be a case of linking PIC code without
3713 linking in any dynamic objects, in which case we don't
3714 need to generate a procedure linkage table after all. */
3715
3716 if (h == NULL)
3717 {
3718 /* It does not make sense to have a procedure linkage
3719 table entry for a local symbol. */
3720 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3721 "local symbol"),
3722 abfd,
3723 sec,
3724 (long) rel->r_offset,
3725 ppc_elf_howto_table[r_type]->name);
3726 bfd_set_error (bfd_error_bad_value);
3727 return FALSE;
3728 }
3729 else
3730 {
3731 bfd_vma addend = 0;
3732
3733 if (r_type == R_PPC_PLTREL24)
3734 {
3735 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3736 if (info->shared)
3737 addend = rel->r_addend;
3738 }
3739 h->needs_plt = 1;
3740 if (!update_plt_info (abfd, &h->plt.plist,
3741 addend < 32768 ? NULL : got2, addend))
3742 return FALSE;
3743 }
3744 break;
3745
3746 /* The following relocations don't need to propagate the
3747 relocation if linking a shared object since they are
3748 section relative. */
3749 case R_PPC_SECTOFF:
3750 case R_PPC_SECTOFF_LO:
3751 case R_PPC_SECTOFF_HI:
3752 case R_PPC_SECTOFF_HA:
3753 case R_PPC_DTPREL16:
3754 case R_PPC_DTPREL16_LO:
3755 case R_PPC_DTPREL16_HI:
3756 case R_PPC_DTPREL16_HA:
3757 case R_PPC_TOC16:
3758 break;
3759
3760 case R_PPC_REL16:
3761 case R_PPC_REL16_LO:
3762 case R_PPC_REL16_HI:
3763 case R_PPC_REL16_HA:
3764 ppc_elf_tdata (abfd)->has_rel16 = 1;
3765 break;
3766
3767 /* These are just markers. */
3768 case R_PPC_TLS:
3769 case R_PPC_EMB_MRKREF:
3770 case R_PPC_NONE:
3771 case R_PPC_max:
3772 case R_PPC_RELAX32:
3773 case R_PPC_RELAX32PC:
3774 case R_PPC_RELAX32_PLT:
3775 case R_PPC_RELAX32PC_PLT:
3776 break;
3777
3778 /* These should only appear in dynamic objects. */
3779 case R_PPC_COPY:
3780 case R_PPC_GLOB_DAT:
3781 case R_PPC_JMP_SLOT:
3782 case R_PPC_RELATIVE:
3783 case R_PPC_IRELATIVE:
3784 break;
3785
3786 /* These aren't handled yet. We'll report an error later. */
3787 case R_PPC_ADDR30:
3788 case R_PPC_EMB_RELSEC16:
3789 case R_PPC_EMB_RELST_LO:
3790 case R_PPC_EMB_RELST_HI:
3791 case R_PPC_EMB_RELST_HA:
3792 case R_PPC_EMB_BIT_FLD:
3793 break;
3794
3795 /* This refers only to functions defined in the shared library. */
3796 case R_PPC_LOCAL24PC:
3797 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3798 {
3799 htab->plt_type = PLT_OLD;
3800 htab->old_bfd = abfd;
3801 }
3802 break;
3803
3804 /* This relocation describes the C++ object vtable hierarchy.
3805 Reconstruct it for later use during GC. */
3806 case R_PPC_GNU_VTINHERIT:
3807 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3808 return FALSE;
3809 break;
3810
3811 /* This relocation describes which C++ vtable entries are actually
3812 used. Record for later use during GC. */
3813 case R_PPC_GNU_VTENTRY:
3814 BFD_ASSERT (h != NULL);
3815 if (h != NULL
3816 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3817 return FALSE;
3818 break;
3819
3820 /* We shouldn't really be seeing these. */
3821 case R_PPC_TPREL32:
3822 case R_PPC_TPREL16:
3823 case R_PPC_TPREL16_LO:
3824 case R_PPC_TPREL16_HI:
3825 case R_PPC_TPREL16_HA:
3826 if (!info->executable)
3827 info->flags |= DF_STATIC_TLS;
3828 goto dodyn;
3829
3830 /* Nor these. */
3831 case R_PPC_DTPMOD32:
3832 case R_PPC_DTPREL32:
3833 goto dodyn;
3834
3835 case R_PPC_REL32:
3836 if (h == NULL
3837 && got2 != NULL
3838 && (sec->flags & SEC_CODE) != 0
3839 && info->shared
3840 && htab->plt_type == PLT_UNSET)
3841 {
3842 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3843 the start of a function, which assembles to a REL32
3844 reference to .got2. If we detect one of these, then
3845 force the old PLT layout because the linker cannot
3846 reliably deduce the GOT pointer value needed for
3847 PLT call stubs. */
3848 asection *s;
3849 Elf_Internal_Sym *isym;
3850
3851 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3852 abfd, r_symndx);
3853 if (isym == NULL)
3854 return FALSE;
3855
3856 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3857 if (s == got2)
3858 {
3859 htab->plt_type = PLT_OLD;
3860 htab->old_bfd = abfd;
3861 }
3862 }
3863 if (h == NULL || h == htab->elf.hgot)
3864 break;
3865 /* fall through */
3866
3867 case R_PPC_ADDR32:
3868 case R_PPC_ADDR16:
3869 case R_PPC_ADDR16_LO:
3870 case R_PPC_ADDR16_HI:
3871 case R_PPC_ADDR16_HA:
3872 case R_PPC_UADDR32:
3873 case R_PPC_UADDR16:
3874 if (h != NULL && !info->shared)
3875 {
3876 /* We may need a plt entry if the symbol turns out to be
3877 a function defined in a dynamic object. */
3878 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3879 return FALSE;
3880
3881 /* We may need a copy reloc too. */
3882 h->non_got_ref = 1;
3883 h->pointer_equality_needed = 1;
3884 }
3885 goto dodyn;
3886
3887 case R_PPC_REL24:
3888 case R_PPC_REL14:
3889 case R_PPC_REL14_BRTAKEN:
3890 case R_PPC_REL14_BRNTAKEN:
3891 if (h == NULL)
3892 break;
3893 if (h == htab->elf.hgot)
3894 {
3895 if (htab->plt_type == PLT_UNSET)
3896 {
3897 htab->plt_type = PLT_OLD;
3898 htab->old_bfd = abfd;
3899 }
3900 break;
3901 }
3902 /* fall through */
3903
3904 case R_PPC_ADDR24:
3905 case R_PPC_ADDR14:
3906 case R_PPC_ADDR14_BRTAKEN:
3907 case R_PPC_ADDR14_BRNTAKEN:
3908 if (h != NULL && !info->shared)
3909 {
3910 /* We may need a plt entry if the symbol turns out to be
3911 a function defined in a dynamic object. */
3912 h->needs_plt = 1;
3913 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3914 return FALSE;
3915 break;
3916 }
3917
3918 dodyn:
3919 /* If we are creating a shared library, and this is a reloc
3920 against a global symbol, or a non PC relative reloc
3921 against a local symbol, then we need to copy the reloc
3922 into the shared library. However, if we are linking with
3923 -Bsymbolic, we do not need to copy a reloc against a
3924 global symbol which is defined in an object we are
3925 including in the link (i.e., DEF_REGULAR is set). At
3926 this point we have not seen all the input files, so it is
3927 possible that DEF_REGULAR is not set now but will be set
3928 later (it is never cleared). In case of a weak definition,
3929 DEF_REGULAR may be cleared later by a strong definition in
3930 a shared library. We account for that possibility below by
3931 storing information in the dyn_relocs field of the hash
3932 table entry. A similar situation occurs when creating
3933 shared libraries and symbol visibility changes render the
3934 symbol local.
3935
3936 If on the other hand, we are creating an executable, we
3937 may need to keep relocations for symbols satisfied by a
3938 dynamic library if we manage to avoid copy relocs for the
3939 symbol. */
3940 if ((info->shared
3941 && (must_be_dyn_reloc (info, r_type)
3942 || (h != NULL
3943 && (! info->symbolic
3944 || h->root.type == bfd_link_hash_defweak
3945 || !h->def_regular))))
3946 || (ELIMINATE_COPY_RELOCS
3947 && !info->shared
3948 && h != NULL
3949 && (h->root.type == bfd_link_hash_defweak
3950 || !h->def_regular)))
3951 {
3952 struct ppc_elf_dyn_relocs *p;
3953 struct ppc_elf_dyn_relocs **head;
3954
3955 #ifdef DEBUG
3956 fprintf (stderr,
3957 "ppc_elf_check_relocs needs to "
3958 "create relocation for %s\n",
3959 (h && h->root.root.string
3960 ? h->root.root.string : "<unknown>"));
3961 #endif
3962 if (sreloc == NULL)
3963 {
3964 if (htab->elf.dynobj == NULL)
3965 htab->elf.dynobj = abfd;
3966
3967 sreloc = _bfd_elf_make_dynamic_reloc_section
3968 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3969
3970 if (sreloc == NULL)
3971 return FALSE;
3972 }
3973
3974 /* If this is a global symbol, we count the number of
3975 relocations we need for this symbol. */
3976 if (h != NULL)
3977 {
3978 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3979 }
3980 else
3981 {
3982 /* Track dynamic relocs needed for local syms too.
3983 We really need local syms available to do this
3984 easily. Oh well. */
3985 asection *s;
3986 void *vpp;
3987 Elf_Internal_Sym *isym;
3988
3989 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3990 abfd, r_symndx);
3991 if (isym == NULL)
3992 return FALSE;
3993
3994 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3995 if (s == NULL)
3996 s = sec;
3997
3998 vpp = &elf_section_data (s)->local_dynrel;
3999 head = (struct ppc_elf_dyn_relocs **) vpp;
4000 }
4001
4002 p = *head;
4003 if (p == NULL || p->sec != sec)
4004 {
4005 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4006 if (p == NULL)
4007 return FALSE;
4008 p->next = *head;
4009 *head = p;
4010 p->sec = sec;
4011 p->count = 0;
4012 p->pc_count = 0;
4013 }
4014
4015 p->count += 1;
4016 if (!must_be_dyn_reloc (info, r_type))
4017 p->pc_count += 1;
4018 }
4019
4020 break;
4021 }
4022 }
4023
4024 return TRUE;
4025 }
4026 \f
4027
4028 /* Merge object attributes from IBFD into OBFD. Raise an error if
4029 there are conflicting attributes. */
4030 static bfd_boolean
4031 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4032 {
4033 obj_attribute *in_attr, *in_attrs;
4034 obj_attribute *out_attr, *out_attrs;
4035
4036 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4037 {
4038 /* This is the first object. Copy the attributes. */
4039 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4040
4041 /* Use the Tag_null value to indicate the attributes have been
4042 initialized. */
4043 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4044
4045 return TRUE;
4046 }
4047
4048 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4049 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4050
4051 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4052 non-conflicting ones. */
4053 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4054 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4055 if (in_attr->i != out_attr->i)
4056 {
4057 out_attr->type = 1;
4058 if (out_attr->i == 0)
4059 out_attr->i = in_attr->i;
4060 else if (in_attr->i == 0)
4061 ;
4062 else if (out_attr->i == 1 && in_attr->i == 2)
4063 _bfd_error_handler
4064 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4065 else if (out_attr->i == 1 && in_attr->i == 3)
4066 _bfd_error_handler
4067 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4068 obfd, ibfd);
4069 else if (out_attr->i == 3 && in_attr->i == 1)
4070 _bfd_error_handler
4071 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4072 ibfd, obfd);
4073 else if (out_attr->i == 3 && in_attr->i == 2)
4074 _bfd_error_handler
4075 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4076 ibfd, obfd);
4077 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4078 _bfd_error_handler
4079 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4080 else if (in_attr->i > 3)
4081 _bfd_error_handler
4082 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4083 in_attr->i);
4084 else
4085 _bfd_error_handler
4086 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4087 out_attr->i);
4088 }
4089
4090 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4091 merge non-conflicting ones. */
4092 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4093 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4094 if (in_attr->i != out_attr->i)
4095 {
4096 const char *in_abi = NULL, *out_abi = NULL;
4097
4098 switch (in_attr->i)
4099 {
4100 case 1: in_abi = "generic"; break;
4101 case 2: in_abi = "AltiVec"; break;
4102 case 3: in_abi = "SPE"; break;
4103 }
4104
4105 switch (out_attr->i)
4106 {
4107 case 1: out_abi = "generic"; break;
4108 case 2: out_abi = "AltiVec"; break;
4109 case 3: out_abi = "SPE"; break;
4110 }
4111
4112 out_attr->type = 1;
4113 if (out_attr->i == 0)
4114 out_attr->i = in_attr->i;
4115 else if (in_attr->i == 0)
4116 ;
4117 /* For now, allow generic to transition to AltiVec or SPE
4118 without a warning. If GCC marked files with their stack
4119 alignment and used don't-care markings for files which are
4120 not affected by the vector ABI, we could warn about this
4121 case too. */
4122 else if (out_attr->i == 1)
4123 out_attr->i = in_attr->i;
4124 else if (in_attr->i == 1)
4125 ;
4126 else if (in_abi == NULL)
4127 _bfd_error_handler
4128 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4129 in_attr->i);
4130 else if (out_abi == NULL)
4131 _bfd_error_handler
4132 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4133 in_attr->i);
4134 else
4135 _bfd_error_handler
4136 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4137 ibfd, obfd, in_abi, out_abi);
4138 }
4139
4140 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4141 and merge non-conflicting ones. */
4142 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4143 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4144 if (in_attr->i != out_attr->i)
4145 {
4146 out_attr->type = 1;
4147 if (out_attr->i == 0)
4148 out_attr->i = in_attr->i;
4149 else if (in_attr->i == 0)
4150 ;
4151 else if (out_attr->i == 1 && in_attr->i == 2)
4152 _bfd_error_handler
4153 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4154 else if (out_attr->i == 2 && in_attr->i == 1)
4155 _bfd_error_handler
4156 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4157 else if (in_attr->i > 2)
4158 _bfd_error_handler
4159 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4160 in_attr->i);
4161 else
4162 _bfd_error_handler
4163 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4164 out_attr->i);
4165 }
4166
4167 /* Merge Tag_compatibility attributes and any common GNU ones. */
4168 _bfd_elf_merge_object_attributes (ibfd, obfd);
4169
4170 return TRUE;
4171 }
4172
4173 /* Merge backend specific data from an object file to the output
4174 object file when linking. */
4175
4176 static bfd_boolean
4177 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4178 {
4179 flagword old_flags;
4180 flagword new_flags;
4181 bfd_boolean error;
4182
4183 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4184 return TRUE;
4185
4186 /* Check if we have the same endianess. */
4187 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4188 return FALSE;
4189
4190 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4191 return FALSE;
4192
4193 new_flags = elf_elfheader (ibfd)->e_flags;
4194 old_flags = elf_elfheader (obfd)->e_flags;
4195 if (!elf_flags_init (obfd))
4196 {
4197 /* First call, no flags set. */
4198 elf_flags_init (obfd) = TRUE;
4199 elf_elfheader (obfd)->e_flags = new_flags;
4200 }
4201
4202 /* Compatible flags are ok. */
4203 else if (new_flags == old_flags)
4204 ;
4205
4206 /* Incompatible flags. */
4207 else
4208 {
4209 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4210 to be linked with either. */
4211 error = FALSE;
4212 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4213 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4214 {
4215 error = TRUE;
4216 (*_bfd_error_handler)
4217 (_("%B: compiled with -mrelocatable and linked with "
4218 "modules compiled normally"), ibfd);
4219 }
4220 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4221 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4222 {
4223 error = TRUE;
4224 (*_bfd_error_handler)
4225 (_("%B: compiled normally and linked with "
4226 "modules compiled with -mrelocatable"), ibfd);
4227 }
4228
4229 /* The output is -mrelocatable-lib iff both the input files are. */
4230 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4231 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4232
4233 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4234 but each input file is either -mrelocatable or -mrelocatable-lib. */
4235 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4236 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4237 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4238 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4239
4240 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4241 any module uses it. */
4242 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4243
4244 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4245 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4246
4247 /* Warn about any other mismatches. */
4248 if (new_flags != old_flags)
4249 {
4250 error = TRUE;
4251 (*_bfd_error_handler)
4252 (_("%B: uses different e_flags (0x%lx) fields "
4253 "than previous modules (0x%lx)"),
4254 ibfd, (long) new_flags, (long) old_flags);
4255 }
4256
4257 if (error)
4258 {
4259 bfd_set_error (bfd_error_bad_value);
4260 return FALSE;
4261 }
4262 }
4263
4264 return TRUE;
4265 }
4266 \f
4267 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4268 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4269 int
4270 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4271 struct bfd_link_info *info,
4272 enum ppc_elf_plt_type plt_style,
4273 int emit_stub_syms)
4274 {
4275 struct ppc_elf_link_hash_table *htab;
4276 flagword flags;
4277
4278 htab = ppc_elf_hash_table (info);
4279
4280 if (htab->plt_type == PLT_UNSET)
4281 {
4282 if (plt_style == PLT_OLD)
4283 htab->plt_type = PLT_OLD;
4284 else
4285 {
4286 bfd *ibfd;
4287 enum ppc_elf_plt_type plt_type = plt_style;
4288
4289 /* Look through the reloc flags left by ppc_elf_check_relocs.
4290 Use the old style bss plt if a file makes plt calls
4291 without using the new relocs, and if ld isn't given
4292 --secure-plt and we never see REL16 relocs. */
4293 if (plt_type == PLT_UNSET)
4294 plt_type = PLT_OLD;
4295 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4296 if (is_ppc_elf (ibfd))
4297 {
4298 if (ppc_elf_tdata (ibfd)->has_rel16)
4299 plt_type = PLT_NEW;
4300 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4301 {
4302 plt_type = PLT_OLD;
4303 htab->old_bfd = ibfd;
4304 break;
4305 }
4306 }
4307 htab->plt_type = plt_type;
4308 }
4309 }
4310 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4311 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4312
4313 htab->emit_stub_syms = emit_stub_syms;
4314
4315 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4316
4317 if (htab->plt_type == PLT_NEW)
4318 {
4319 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4320 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4321
4322 /* The new PLT is a loaded section. */
4323 if (htab->plt != NULL
4324 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4325 return -1;
4326
4327 /* The new GOT is not executable. */
4328 if (htab->got != NULL
4329 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4330 return -1;
4331 }
4332 else
4333 {
4334 /* Stop an unused .glink section from affecting .text alignment. */
4335 if (htab->glink != NULL
4336 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4337 return -1;
4338 }
4339 return htab->plt_type == PLT_NEW;
4340 }
4341 \f
4342 /* Return the section that should be marked against GC for a given
4343 relocation. */
4344
4345 static asection *
4346 ppc_elf_gc_mark_hook (asection *sec,
4347 struct bfd_link_info *info,
4348 Elf_Internal_Rela *rel,
4349 struct elf_link_hash_entry *h,
4350 Elf_Internal_Sym *sym)
4351 {
4352 if (h != NULL)
4353 switch (ELF32_R_TYPE (rel->r_info))
4354 {
4355 case R_PPC_GNU_VTINHERIT:
4356 case R_PPC_GNU_VTENTRY:
4357 return NULL;
4358 }
4359
4360 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4361 }
4362
4363 /* Update the got, plt and dynamic reloc reference counts for the
4364 section being removed. */
4365
4366 static bfd_boolean
4367 ppc_elf_gc_sweep_hook (bfd *abfd,
4368 struct bfd_link_info *info,
4369 asection *sec,
4370 const Elf_Internal_Rela *relocs)
4371 {
4372 struct ppc_elf_link_hash_table *htab;
4373 Elf_Internal_Shdr *symtab_hdr;
4374 struct elf_link_hash_entry **sym_hashes;
4375 bfd_signed_vma *local_got_refcounts;
4376 const Elf_Internal_Rela *rel, *relend;
4377 asection *got2;
4378
4379 if (info->relocatable)
4380 return TRUE;
4381
4382 if ((sec->flags & SEC_ALLOC) == 0)
4383 return TRUE;
4384
4385 elf_section_data (sec)->local_dynrel = NULL;
4386
4387 htab = ppc_elf_hash_table (info);
4388 symtab_hdr = &elf_symtab_hdr (abfd);
4389 sym_hashes = elf_sym_hashes (abfd);
4390 local_got_refcounts = elf_local_got_refcounts (abfd);
4391 got2 = bfd_get_section_by_name (abfd, ".got2");
4392
4393 relend = relocs + sec->reloc_count;
4394 for (rel = relocs; rel < relend; rel++)
4395 {
4396 unsigned long r_symndx;
4397 enum elf_ppc_reloc_type r_type;
4398 struct elf_link_hash_entry *h = NULL;
4399
4400 r_symndx = ELF32_R_SYM (rel->r_info);
4401 if (r_symndx >= symtab_hdr->sh_info)
4402 {
4403 struct ppc_elf_dyn_relocs **pp, *p;
4404 struct ppc_elf_link_hash_entry *eh;
4405
4406 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4407 while (h->root.type == bfd_link_hash_indirect
4408 || h->root.type == bfd_link_hash_warning)
4409 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4410 eh = (struct ppc_elf_link_hash_entry *) h;
4411
4412 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4413 if (p->sec == sec)
4414 {
4415 /* Everything must go for SEC. */
4416 *pp = p->next;
4417 break;
4418 }
4419 }
4420
4421 r_type = ELF32_R_TYPE (rel->r_info);
4422 if (!htab->is_vxworks
4423 && h == NULL
4424 && local_got_refcounts != NULL
4425 && (!info->shared
4426 || is_branch_reloc (r_type)))
4427 {
4428 struct plt_entry **local_plt = (struct plt_entry **)
4429 (local_got_refcounts + symtab_hdr->sh_info);
4430 char *local_got_tls_masks = (char *)
4431 (local_plt + symtab_hdr->sh_info);
4432 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4433 {
4434 struct plt_entry **ifunc = local_plt + r_symndx;
4435 bfd_vma addend = 0;
4436 struct plt_entry *ent;
4437
4438 if (r_type == R_PPC_PLTREL24 && info->shared)
4439 addend = rel->r_addend;
4440 ent = find_plt_ent (ifunc, got2, addend);
4441 if (ent->plt.refcount > 0)
4442 ent->plt.refcount -= 1;
4443 continue;
4444 }
4445 }
4446
4447 switch (r_type)
4448 {
4449 case R_PPC_GOT_TLSLD16:
4450 case R_PPC_GOT_TLSLD16_LO:
4451 case R_PPC_GOT_TLSLD16_HI:
4452 case R_PPC_GOT_TLSLD16_HA:
4453 case R_PPC_GOT_TLSGD16:
4454 case R_PPC_GOT_TLSGD16_LO:
4455 case R_PPC_GOT_TLSGD16_HI:
4456 case R_PPC_GOT_TLSGD16_HA:
4457 case R_PPC_GOT_TPREL16:
4458 case R_PPC_GOT_TPREL16_LO:
4459 case R_PPC_GOT_TPREL16_HI:
4460 case R_PPC_GOT_TPREL16_HA:
4461 case R_PPC_GOT_DTPREL16:
4462 case R_PPC_GOT_DTPREL16_LO:
4463 case R_PPC_GOT_DTPREL16_HI:
4464 case R_PPC_GOT_DTPREL16_HA:
4465 case R_PPC_GOT16:
4466 case R_PPC_GOT16_LO:
4467 case R_PPC_GOT16_HI:
4468 case R_PPC_GOT16_HA:
4469 if (h != NULL)
4470 {
4471 if (h->got.refcount > 0)
4472 h->got.refcount--;
4473 if (!info->shared)
4474 {
4475 struct plt_entry *ent;
4476
4477 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4478 if (ent->plt.refcount > 0)
4479 ent->plt.refcount -= 1;
4480 }
4481 }
4482 else if (local_got_refcounts != NULL)
4483 {
4484 if (local_got_refcounts[r_symndx] > 0)
4485 local_got_refcounts[r_symndx]--;
4486 }
4487 break;
4488
4489 case R_PPC_REL24:
4490 case R_PPC_REL14:
4491 case R_PPC_REL14_BRTAKEN:
4492 case R_PPC_REL14_BRNTAKEN:
4493 case R_PPC_REL32:
4494 if (h == NULL || h == htab->elf.hgot)
4495 break;
4496 /* Fall thru */
4497
4498 case R_PPC_ADDR32:
4499 case R_PPC_ADDR24:
4500 case R_PPC_ADDR16:
4501 case R_PPC_ADDR16_LO:
4502 case R_PPC_ADDR16_HI:
4503 case R_PPC_ADDR16_HA:
4504 case R_PPC_ADDR14:
4505 case R_PPC_ADDR14_BRTAKEN:
4506 case R_PPC_ADDR14_BRNTAKEN:
4507 case R_PPC_UADDR32:
4508 case R_PPC_UADDR16:
4509 if (info->shared)
4510 break;
4511
4512 case R_PPC_PLT32:
4513 case R_PPC_PLTREL24:
4514 case R_PPC_PLTREL32:
4515 case R_PPC_PLT16_LO:
4516 case R_PPC_PLT16_HI:
4517 case R_PPC_PLT16_HA:
4518 if (h != NULL)
4519 {
4520 bfd_vma addend = 0;
4521 struct plt_entry *ent;
4522
4523 if (r_type == R_PPC_PLTREL24 && info->shared)
4524 addend = rel->r_addend;
4525 ent = find_plt_ent (&h->plt.plist, got2, addend);
4526 if (ent->plt.refcount > 0)
4527 ent->plt.refcount -= 1;
4528 }
4529 break;
4530
4531 default:
4532 break;
4533 }
4534 }
4535 return TRUE;
4536 }
4537 \f
4538 /* Set plt output section type, htab->tls_get_addr, and call the
4539 generic ELF tls_setup function. */
4540
4541 asection *
4542 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4543 {
4544 struct ppc_elf_link_hash_table *htab;
4545
4546 htab = ppc_elf_hash_table (info);
4547 if (htab->plt_type == PLT_NEW
4548 && htab->plt != NULL
4549 && htab->plt->output_section != NULL)
4550 {
4551 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4552 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4553 }
4554
4555 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4556 FALSE, FALSE, TRUE);
4557 return _bfd_elf_tls_setup (obfd, info);
4558 }
4559
4560 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4561 HASH. */
4562
4563 static bfd_boolean
4564 branch_reloc_hash_match (const bfd *ibfd,
4565 const Elf_Internal_Rela *rel,
4566 const struct elf_link_hash_entry *hash)
4567 {
4568 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4569 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4570 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4571
4572 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4573 {
4574 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4575 struct elf_link_hash_entry *h;
4576
4577 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4578 while (h->root.type == bfd_link_hash_indirect
4579 || h->root.type == bfd_link_hash_warning)
4580 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4581 if (h == hash)
4582 return TRUE;
4583 }
4584 return FALSE;
4585 }
4586
4587 /* Run through all the TLS relocs looking for optimization
4588 opportunities. */
4589
4590 bfd_boolean
4591 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4592 struct bfd_link_info *info)
4593 {
4594 bfd *ibfd;
4595 asection *sec;
4596 struct ppc_elf_link_hash_table *htab;
4597 int pass;
4598
4599 if (info->relocatable || !info->executable)
4600 return TRUE;
4601
4602 htab = ppc_elf_hash_table (info);
4603 /* Make two passes through the relocs. First time check that tls
4604 relocs involved in setting up a tls_get_addr call are indeed
4605 followed by such a call. If they are not, exclude them from
4606 the optimizations done on the second pass. */
4607 for (pass = 0; pass < 2; ++pass)
4608 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4609 {
4610 Elf_Internal_Sym *locsyms = NULL;
4611 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4612
4613 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4614 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4615 {
4616 Elf_Internal_Rela *relstart, *rel, *relend;
4617
4618 /* Read the relocations. */
4619 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4620 info->keep_memory);
4621 if (relstart == NULL)
4622 return FALSE;
4623
4624 relend = relstart + sec->reloc_count;
4625 for (rel = relstart; rel < relend; rel++)
4626 {
4627 enum elf_ppc_reloc_type r_type;
4628 unsigned long r_symndx;
4629 struct elf_link_hash_entry *h = NULL;
4630 char *tls_mask;
4631 char tls_set, tls_clear;
4632 bfd_boolean is_local;
4633 int expecting_tls_get_addr;
4634 bfd_signed_vma *got_count;
4635
4636 r_symndx = ELF32_R_SYM (rel->r_info);
4637 if (r_symndx >= symtab_hdr->sh_info)
4638 {
4639 struct elf_link_hash_entry **sym_hashes;
4640
4641 sym_hashes = elf_sym_hashes (ibfd);
4642 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4643 while (h->root.type == bfd_link_hash_indirect
4644 || h->root.type == bfd_link_hash_warning)
4645 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4646 }
4647
4648 expecting_tls_get_addr = 0;
4649 is_local = FALSE;
4650 if (h == NULL
4651 || !h->def_dynamic)
4652 is_local = TRUE;
4653
4654 r_type = ELF32_R_TYPE (rel->r_info);
4655 switch (r_type)
4656 {
4657 case R_PPC_GOT_TLSLD16:
4658 case R_PPC_GOT_TLSLD16_LO:
4659 expecting_tls_get_addr = 1;
4660 /* Fall thru */
4661
4662 case R_PPC_GOT_TLSLD16_HI:
4663 case R_PPC_GOT_TLSLD16_HA:
4664 /* These relocs should never be against a symbol
4665 defined in a shared lib. Leave them alone if
4666 that turns out to be the case. */
4667 if (!is_local)
4668 continue;
4669
4670 /* LD -> LE */
4671 tls_set = 0;
4672 tls_clear = TLS_LD;
4673 break;
4674
4675 case R_PPC_GOT_TLSGD16:
4676 case R_PPC_GOT_TLSGD16_LO:
4677 expecting_tls_get_addr = 1;
4678 /* Fall thru */
4679
4680 case R_PPC_GOT_TLSGD16_HI:
4681 case R_PPC_GOT_TLSGD16_HA:
4682 if (is_local)
4683 /* GD -> LE */
4684 tls_set = 0;
4685 else
4686 /* GD -> IE */
4687 tls_set = TLS_TLS | TLS_TPRELGD;
4688 tls_clear = TLS_GD;
4689 break;
4690
4691 case R_PPC_GOT_TPREL16:
4692 case R_PPC_GOT_TPREL16_LO:
4693 case R_PPC_GOT_TPREL16_HI:
4694 case R_PPC_GOT_TPREL16_HA:
4695 if (is_local)
4696 {
4697 /* IE -> LE */
4698 tls_set = 0;
4699 tls_clear = TLS_TPREL;
4700 break;
4701 }
4702 else
4703 continue;
4704
4705 default:
4706 continue;
4707 }
4708
4709 if (pass == 0)
4710 {
4711 if (!expecting_tls_get_addr
4712 || !sec->has_tls_get_addr_call)
4713 continue;
4714
4715 if (rel + 1 < relend
4716 && branch_reloc_hash_match (ibfd, rel + 1,
4717 htab->tls_get_addr))
4718 continue;
4719
4720 /* Uh oh, we didn't find the expected call. We
4721 could just mark this symbol to exclude it
4722 from tls optimization but it's safer to skip
4723 the entire section. */
4724 sec->has_tls_reloc = 0;
4725 break;
4726 }
4727
4728 if (h != NULL)
4729 {
4730 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4731 got_count = &h->got.refcount;
4732 }
4733 else
4734 {
4735 Elf_Internal_Sym *sym;
4736 bfd_signed_vma *lgot_refs;
4737 struct plt_entry **local_plt;
4738 char *lgot_masks;
4739
4740 if (locsyms == NULL)
4741 {
4742 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4743 if (locsyms == NULL)
4744 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4745 symtab_hdr->sh_info,
4746 0, NULL, NULL, NULL);
4747 if (locsyms == NULL)
4748 {
4749 if (elf_section_data (sec)->relocs != relstart)
4750 free (relstart);
4751 return FALSE;
4752 }
4753 }
4754 sym = locsyms + r_symndx;
4755 lgot_refs = elf_local_got_refcounts (ibfd);
4756 if (lgot_refs == NULL)
4757 abort ();
4758 local_plt = (struct plt_entry **)
4759 (lgot_refs + symtab_hdr->sh_info);
4760 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4761 tls_mask = &lgot_masks[r_symndx];
4762 got_count = &lgot_refs[r_symndx];
4763 }
4764
4765 if (tls_set == 0)
4766 {
4767 /* We managed to get rid of a got entry. */
4768 if (*got_count > 0)
4769 *got_count -= 1;
4770 }
4771
4772 if (expecting_tls_get_addr)
4773 {
4774 struct plt_entry *ent;
4775
4776 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4777 NULL, 0);
4778 if (ent != NULL && ent->plt.refcount > 0)
4779 ent->plt.refcount -= 1;
4780 }
4781
4782 *tls_mask |= tls_set;
4783 *tls_mask &= ~tls_clear;
4784 }
4785
4786 if (elf_section_data (sec)->relocs != relstart)
4787 free (relstart);
4788 }
4789
4790 if (locsyms != NULL
4791 && (symtab_hdr->contents != (unsigned char *) locsyms))
4792 {
4793 if (!info->keep_memory)
4794 free (locsyms);
4795 else
4796 symtab_hdr->contents = (unsigned char *) locsyms;
4797 }
4798 }
4799 return TRUE;
4800 }
4801 \f
4802 /* Return true if we have dynamic relocs that apply to read-only sections. */
4803
4804 static bfd_boolean
4805 readonly_dynrelocs (struct elf_link_hash_entry *h)
4806 {
4807 struct ppc_elf_dyn_relocs *p;
4808
4809 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4810 {
4811 asection *s = p->sec->output_section;
4812
4813 if (s != NULL
4814 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4815 == (SEC_READONLY | SEC_ALLOC)))
4816 return TRUE;
4817 }
4818 return FALSE;
4819 }
4820
4821 /* Adjust a symbol defined by a dynamic object and referenced by a
4822 regular object. The current definition is in some section of the
4823 dynamic object, but we're not including those sections. We have to
4824 change the definition to something the rest of the link can
4825 understand. */
4826
4827 static bfd_boolean
4828 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4829 struct elf_link_hash_entry *h)
4830 {
4831 struct ppc_elf_link_hash_table *htab;
4832 asection *s;
4833
4834 #ifdef DEBUG
4835 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4836 h->root.root.string);
4837 #endif
4838
4839 /* Make sure we know what is going on here. */
4840 htab = ppc_elf_hash_table (info);
4841 BFD_ASSERT (htab->elf.dynobj != NULL
4842 && (h->needs_plt
4843 || h->type == STT_GNU_IFUNC
4844 || h->u.weakdef != NULL
4845 || (h->def_dynamic
4846 && h->ref_regular
4847 && !h->def_regular)));
4848
4849 /* Deal with function syms. */
4850 if (h->type == STT_FUNC
4851 || h->type == STT_GNU_IFUNC
4852 || h->needs_plt)
4853 {
4854 /* Clear procedure linkage table information for any symbol that
4855 won't need a .plt entry. */
4856 struct plt_entry *ent;
4857 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4858 if (ent->plt.refcount > 0)
4859 break;
4860 if (ent == NULL
4861 || (h->type != STT_GNU_IFUNC
4862 && (SYMBOL_CALLS_LOCAL (info, h)
4863 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4864 && h->root.type == bfd_link_hash_undefweak))))
4865 {
4866 /* A PLT entry is not required/allowed when:
4867
4868 1. We are not using ld.so; because then the PLT entry
4869 can't be set up, so we can't use one. In this case,
4870 ppc_elf_adjust_dynamic_symbol won't even be called.
4871
4872 2. GC has rendered the entry unused.
4873
4874 3. We know for certain that a call to this symbol
4875 will go to this object, or will remain undefined. */
4876 h->plt.plist = NULL;
4877 h->needs_plt = 0;
4878 }
4879 else
4880 {
4881 /* After adjust_dynamic_symbol, non_got_ref set in the
4882 non-shared case means that we have allocated space in
4883 .dynbss for the symbol and thus dyn_relocs for this
4884 symbol should be discarded.
4885 If we get here we know we are making a PLT entry for this
4886 symbol, and in an executable we'd normally resolve
4887 relocations against this symbol to the PLT entry. Allow
4888 dynamic relocs if the reference is weak, and the dynamic
4889 relocs will not cause text relocation. */
4890 if (!h->ref_regular_nonweak
4891 && h->non_got_ref
4892 && h->type != STT_GNU_IFUNC
4893 && !htab->is_vxworks
4894 && !ppc_elf_hash_entry (h)->has_sda_refs
4895 && !readonly_dynrelocs (h))
4896 h->non_got_ref = 0;
4897 }
4898 return TRUE;
4899 }
4900 else
4901 h->plt.plist = NULL;
4902
4903 /* If this is a weak symbol, and there is a real definition, the
4904 processor independent code will have arranged for us to see the
4905 real definition first, and we can just use the same value. */
4906 if (h->u.weakdef != NULL)
4907 {
4908 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4909 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4910 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4911 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4912 if (ELIMINATE_COPY_RELOCS)
4913 h->non_got_ref = h->u.weakdef->non_got_ref;
4914 return TRUE;
4915 }
4916
4917 /* This is a reference to a symbol defined by a dynamic object which
4918 is not a function. */
4919
4920 /* If we are creating a shared library, we must presume that the
4921 only references to the symbol are via the global offset table.
4922 For such cases we need not do anything here; the relocations will
4923 be handled correctly by relocate_section. */
4924 if (info->shared)
4925 return TRUE;
4926
4927 /* If there are no references to this symbol that do not use the
4928 GOT, we don't need to generate a copy reloc. */
4929 if (!h->non_got_ref)
4930 return TRUE;
4931
4932 /* If we didn't find any dynamic relocs in read-only sections, then
4933 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4934 We can't do this if there are any small data relocations. This
4935 doesn't work on VxWorks, where we can not have dynamic
4936 relocations (other than copy and jump slot relocations) in an
4937 executable. */
4938 if (ELIMINATE_COPY_RELOCS
4939 && !ppc_elf_hash_entry (h)->has_sda_refs
4940 && !htab->is_vxworks
4941 && !h->def_regular
4942 && !readonly_dynrelocs (h))
4943 {
4944 h->non_got_ref = 0;
4945 return TRUE;
4946 }
4947
4948 if (h->size == 0)
4949 {
4950 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4951 h->root.root.string);
4952 return TRUE;
4953 }
4954
4955 /* We must allocate the symbol in our .dynbss section, which will
4956 become part of the .bss section of the executable. There will be
4957 an entry for this symbol in the .dynsym section. The dynamic
4958 object will contain position independent code, so all references
4959 from the dynamic object to this symbol will go through the global
4960 offset table. The dynamic linker will use the .dynsym entry to
4961 determine the address it must put in the global offset table, so
4962 both the dynamic object and the regular object will refer to the
4963 same memory location for the variable.
4964
4965 Of course, if the symbol is referenced using SDAREL relocs, we
4966 must instead allocate it in .sbss. */
4967
4968 if (ppc_elf_hash_entry (h)->has_sda_refs)
4969 s = htab->dynsbss;
4970 else
4971 s = htab->dynbss;
4972 BFD_ASSERT (s != NULL);
4973
4974 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4975 copy the initial value out of the dynamic object and into the
4976 runtime process image. We need to remember the offset into the
4977 .rela.bss section we are going to use. */
4978 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4979 {
4980 asection *srel;
4981
4982 if (ppc_elf_hash_entry (h)->has_sda_refs)
4983 srel = htab->relsbss;
4984 else
4985 srel = htab->relbss;
4986 BFD_ASSERT (srel != NULL);
4987 srel->size += sizeof (Elf32_External_Rela);
4988 h->needs_copy = 1;
4989 }
4990
4991 return _bfd_elf_adjust_dynamic_copy (h, s);
4992 }
4993 \f
4994 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4995 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4996 specifying the addend on the plt relocation. For -fpic code, the sym
4997 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4998 xxxxxxxx.got2.plt_pic32.<callee>. */
4999
5000 static bfd_boolean
5001 add_stub_sym (struct plt_entry *ent,
5002 struct elf_link_hash_entry *h,
5003 struct bfd_link_info *info)
5004 {
5005 struct elf_link_hash_entry *sh;
5006 size_t len1, len2, len3;
5007 char *name;
5008 const char *stub;
5009 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5010
5011 if (info->shared)
5012 stub = ".plt_pic32.";
5013 else
5014 stub = ".plt_call32.";
5015
5016 len1 = strlen (h->root.root.string);
5017 len2 = strlen (stub);
5018 len3 = 0;
5019 if (ent->sec)
5020 len3 = strlen (ent->sec->name);
5021 name = bfd_malloc (len1 + len2 + len3 + 9);
5022 if (name == NULL)
5023 return FALSE;
5024 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5025 if (ent->sec)
5026 memcpy (name + 8, ent->sec->name, len3);
5027 memcpy (name + 8 + len3, stub, len2);
5028 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5029 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5030 if (sh == NULL)
5031 return FALSE;
5032 if (sh->root.type == bfd_link_hash_new)
5033 {
5034 sh->root.type = bfd_link_hash_defined;
5035 sh->root.u.def.section = htab->glink;
5036 sh->root.u.def.value = ent->glink_offset;
5037 sh->ref_regular = 1;
5038 sh->def_regular = 1;
5039 sh->ref_regular_nonweak = 1;
5040 sh->forced_local = 1;
5041 sh->non_elf = 0;
5042 }
5043 return TRUE;
5044 }
5045
5046 /* Allocate NEED contiguous space in .got, and return the offset.
5047 Handles allocation of the got header when crossing 32k. */
5048
5049 static bfd_vma
5050 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5051 {
5052 bfd_vma where;
5053 unsigned int max_before_header;
5054
5055 if (htab->plt_type == PLT_VXWORKS)
5056 {
5057 where = htab->got->size;
5058 htab->got->size += need;
5059 }
5060 else
5061 {
5062 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5063 if (need <= htab->got_gap)
5064 {
5065 where = max_before_header - htab->got_gap;
5066 htab->got_gap -= need;
5067 }
5068 else
5069 {
5070 if (htab->got->size + need > max_before_header
5071 && htab->got->size <= max_before_header)
5072 {
5073 htab->got_gap = max_before_header - htab->got->size;
5074 htab->got->size = max_before_header + htab->got_header_size;
5075 }
5076 where = htab->got->size;
5077 htab->got->size += need;
5078 }
5079 }
5080 return where;
5081 }
5082
5083 /* Allocate space in associated reloc sections for dynamic relocs. */
5084
5085 static bfd_boolean
5086 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5087 {
5088 struct bfd_link_info *info = inf;
5089 struct ppc_elf_link_hash_entry *eh;
5090 struct ppc_elf_link_hash_table *htab;
5091 struct ppc_elf_dyn_relocs *p;
5092
5093 if (h->root.type == bfd_link_hash_indirect)
5094 return TRUE;
5095
5096 if (h->root.type == bfd_link_hash_warning)
5097 /* When warning symbols are created, they **replace** the "real"
5098 entry in the hash table, thus we never get to see the real
5099 symbol in a hash traversal. So look at it now. */
5100 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5101
5102 htab = ppc_elf_hash_table (info);
5103 if (htab->elf.dynamic_sections_created
5104 || h->type == STT_GNU_IFUNC)
5105 {
5106 struct plt_entry *ent;
5107 bfd_boolean doneone = FALSE;
5108 bfd_vma plt_offset = 0, glink_offset = 0;
5109 bfd_boolean dyn;
5110
5111 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5112 if (ent->plt.refcount > 0)
5113 {
5114 /* Make sure this symbol is output as a dynamic symbol. */
5115 if (h->dynindx == -1
5116 && !h->forced_local
5117 && !h->def_regular
5118 && htab->elf.dynamic_sections_created)
5119 {
5120 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5121 return FALSE;
5122 }
5123
5124 dyn = htab->elf.dynamic_sections_created;
5125 if (info->shared
5126 || h->type == STT_GNU_IFUNC
5127 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5128 {
5129 asection *s = htab->plt;
5130 if (!dyn || h->dynindx == -1)
5131 s = htab->iplt;
5132
5133 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5134 {
5135 if (!doneone)
5136 {
5137 plt_offset = s->size;
5138 s->size += 4;
5139 }
5140 ent->plt.offset = plt_offset;
5141
5142 s = htab->glink;
5143 if (!doneone || info->shared)
5144 {
5145 glink_offset = s->size;
5146 s->size += GLINK_ENTRY_SIZE;
5147 }
5148 if (!doneone
5149 && !info->shared
5150 && h->def_dynamic
5151 && !h->def_regular)
5152 {
5153 h->root.u.def.section = s;
5154 h->root.u.def.value = glink_offset;
5155 }
5156 ent->glink_offset = glink_offset;
5157
5158 if (htab->emit_stub_syms
5159 && !add_stub_sym (ent, h, info))
5160 return FALSE;
5161 }
5162 else
5163 {
5164 if (!doneone)
5165 {
5166 /* If this is the first .plt entry, make room
5167 for the special first entry. */
5168 if (s->size == 0)
5169 s->size += htab->plt_initial_entry_size;
5170
5171 /* The PowerPC PLT is actually composed of two
5172 parts, the first part is 2 words (for a load
5173 and a jump), and then there is a remaining
5174 word available at the end. */
5175 plt_offset = (htab->plt_initial_entry_size
5176 + (htab->plt_slot_size
5177 * ((s->size
5178 - htab->plt_initial_entry_size)
5179 / htab->plt_entry_size)));
5180
5181 /* If this symbol is not defined in a regular
5182 file, and we are not generating a shared
5183 library, then set the symbol to this location
5184 in the .plt. This is to avoid text
5185 relocations, and is required to make
5186 function pointers compare as equal between
5187 the normal executable and the shared library. */
5188 if (! info->shared
5189 && h->def_dynamic
5190 && !h->def_regular)
5191 {
5192 h->root.u.def.section = s;
5193 h->root.u.def.value = plt_offset;
5194 }
5195
5196 /* Make room for this entry. */
5197 s->size += htab->plt_entry_size;
5198 /* After the 8192nd entry, room for two entries
5199 is allocated. */
5200 if (htab->plt_type == PLT_OLD
5201 && (s->size - htab->plt_initial_entry_size)
5202 / htab->plt_entry_size
5203 > PLT_NUM_SINGLE_ENTRIES)
5204 s->size += htab->plt_entry_size;
5205 }
5206 ent->plt.offset = plt_offset;
5207 }
5208
5209 /* We also need to make an entry in the .rela.plt section. */
5210 if (!doneone)
5211 {
5212 if (!htab->elf.dynamic_sections_created
5213 || h->dynindx == -1)
5214 htab->reliplt->size += sizeof (Elf32_External_Rela);
5215 else
5216 {
5217 htab->relplt->size += sizeof (Elf32_External_Rela);
5218
5219 if (htab->plt_type == PLT_VXWORKS)
5220 {
5221 /* Allocate space for the unloaded relocations. */
5222 if (!info->shared
5223 && htab->elf.dynamic_sections_created)
5224 {
5225 if (ent->plt.offset
5226 == (bfd_vma) htab->plt_initial_entry_size)
5227 {
5228 htab->srelplt2->size
5229 += (sizeof (Elf32_External_Rela)
5230 * VXWORKS_PLTRESOLVE_RELOCS);
5231 }
5232
5233 htab->srelplt2->size
5234 += (sizeof (Elf32_External_Rela)
5235 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5236 }
5237
5238 /* Every PLT entry has an associated GOT entry in
5239 .got.plt. */
5240 htab->sgotplt->size += 4;
5241 }
5242 }
5243 doneone = TRUE;
5244 }
5245 }
5246 else
5247 ent->plt.offset = (bfd_vma) -1;
5248 }
5249 else
5250 ent->plt.offset = (bfd_vma) -1;
5251
5252 if (!doneone)
5253 {
5254 h->plt.plist = NULL;
5255 h->needs_plt = 0;
5256 }
5257 }
5258 else
5259 {
5260 h->plt.plist = NULL;
5261 h->needs_plt = 0;
5262 }
5263
5264 eh = (struct ppc_elf_link_hash_entry *) h;
5265 if (eh->elf.got.refcount > 0)
5266 {
5267 bfd_boolean dyn;
5268 unsigned int need;
5269
5270 /* Make sure this symbol is output as a dynamic symbol. */
5271 if (eh->elf.dynindx == -1
5272 && !eh->elf.forced_local
5273 && eh->elf.type != STT_GNU_IFUNC
5274 && htab->elf.dynamic_sections_created)
5275 {
5276 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5277 return FALSE;
5278 }
5279
5280 need = 0;
5281 if ((eh->tls_mask & TLS_TLS) != 0)
5282 {
5283 if ((eh->tls_mask & TLS_LD) != 0)
5284 {
5285 if (!eh->elf.def_dynamic)
5286 /* We'll just use htab->tlsld_got.offset. This should
5287 always be the case. It's a little odd if we have
5288 a local dynamic reloc against a non-local symbol. */
5289 htab->tlsld_got.refcount += 1;
5290 else
5291 need += 8;
5292 }
5293 if ((eh->tls_mask & TLS_GD) != 0)
5294 need += 8;
5295 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5296 need += 4;
5297 if ((eh->tls_mask & TLS_DTPREL) != 0)
5298 need += 4;
5299 }
5300 else
5301 need += 4;
5302 if (need == 0)
5303 eh->elf.got.offset = (bfd_vma) -1;
5304 else
5305 {
5306 eh->elf.got.offset = allocate_got (htab, need);
5307 dyn = htab->elf.dynamic_sections_created;
5308 if ((info->shared
5309 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5310 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5311 || eh->elf.root.type != bfd_link_hash_undefweak))
5312 {
5313 asection *rsec = htab->relgot;
5314 /* All the entries we allocated need relocs.
5315 Except LD only needs one. */
5316 if ((eh->tls_mask & TLS_LD) != 0
5317 && eh->elf.def_dynamic)
5318 need -= 4;
5319 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5320 }
5321 }
5322 }
5323 else
5324 eh->elf.got.offset = (bfd_vma) -1;
5325
5326 if (eh->dyn_relocs == NULL
5327 || !htab->elf.dynamic_sections_created)
5328 return TRUE;
5329
5330 /* In the shared -Bsymbolic case, discard space allocated for
5331 dynamic pc-relative relocs against symbols which turn out to be
5332 defined in regular objects. For the normal shared case, discard
5333 space for relocs that have become local due to symbol visibility
5334 changes. */
5335
5336 if (info->shared)
5337 {
5338 /* Relocs that use pc_count are those that appear on a call insn,
5339 or certain REL relocs (see must_be_dyn_reloc) that can be
5340 generated via assembly. We want calls to protected symbols to
5341 resolve directly to the function rather than going via the plt.
5342 If people want function pointer comparisons to work as expected
5343 then they should avoid writing weird assembly. */
5344 if (SYMBOL_CALLS_LOCAL (info, h))
5345 {
5346 struct ppc_elf_dyn_relocs **pp;
5347
5348 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5349 {
5350 p->count -= p->pc_count;
5351 p->pc_count = 0;
5352 if (p->count == 0)
5353 *pp = p->next;
5354 else
5355 pp = &p->next;
5356 }
5357 }
5358
5359 if (htab->is_vxworks)
5360 {
5361 struct ppc_elf_dyn_relocs **pp;
5362
5363 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5364 {
5365 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5366 *pp = p->next;
5367 else
5368 pp = &p->next;
5369 }
5370 }
5371
5372 /* Discard relocs on undefined symbols that must be local. */
5373 if (eh->dyn_relocs != NULL
5374 && h->root.type == bfd_link_hash_undefined
5375 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5376 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5377 eh->dyn_relocs = NULL;
5378
5379 /* Also discard relocs on undefined weak syms with non-default
5380 visibility. */
5381 if (eh->dyn_relocs != NULL
5382 && h->root.type == bfd_link_hash_undefweak)
5383 {
5384 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5385 eh->dyn_relocs = NULL;
5386
5387 /* Make sure undefined weak symbols are output as a dynamic
5388 symbol in PIEs. */
5389 else if (h->dynindx == -1
5390 && !h->forced_local
5391 && !h->def_regular)
5392 {
5393 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5394 return FALSE;
5395 }
5396 }
5397 }
5398 else if (ELIMINATE_COPY_RELOCS)
5399 {
5400 /* For the non-shared case, discard space for relocs against
5401 symbols which turn out to need copy relocs or are not
5402 dynamic. */
5403
5404 if (!h->non_got_ref
5405 && !h->def_regular)
5406 {
5407 /* Make sure this symbol is output as a dynamic symbol.
5408 Undefined weak syms won't yet be marked as dynamic. */
5409 if (h->dynindx == -1
5410 && !h->forced_local)
5411 {
5412 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5413 return FALSE;
5414 }
5415
5416 /* If that succeeded, we know we'll be keeping all the
5417 relocs. */
5418 if (h->dynindx != -1)
5419 goto keep;
5420 }
5421
5422 eh->dyn_relocs = NULL;
5423
5424 keep: ;
5425 }
5426
5427 /* Finally, allocate space. */
5428 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5429 {
5430 asection *sreloc = elf_section_data (p->sec)->sreloc;
5431 if (!htab->elf.dynamic_sections_created)
5432 sreloc = htab->reliplt;
5433 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5434 }
5435
5436 return TRUE;
5437 }
5438
5439 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5440 read-only sections. */
5441
5442 static bfd_boolean
5443 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5444 {
5445 if (h->root.type == bfd_link_hash_indirect)
5446 return TRUE;
5447
5448 if (h->root.type == bfd_link_hash_warning)
5449 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5450
5451 if (readonly_dynrelocs (h))
5452 {
5453 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5454
5455 /* Not an error, just cut short the traversal. */
5456 return FALSE;
5457 }
5458 return TRUE;
5459 }
5460
5461 /* Set the sizes of the dynamic sections. */
5462
5463 static bfd_boolean
5464 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5465 struct bfd_link_info *info)
5466 {
5467 struct ppc_elf_link_hash_table *htab;
5468 asection *s;
5469 bfd_boolean relocs;
5470 bfd *ibfd;
5471
5472 #ifdef DEBUG
5473 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5474 #endif
5475
5476 htab = ppc_elf_hash_table (info);
5477 BFD_ASSERT (htab->elf.dynobj != NULL);
5478
5479 if (elf_hash_table (info)->dynamic_sections_created)
5480 {
5481 /* Set the contents of the .interp section to the interpreter. */
5482 if (info->executable)
5483 {
5484 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5485 BFD_ASSERT (s != NULL);
5486 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5487 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5488 }
5489 }
5490
5491 if (htab->plt_type == PLT_OLD)
5492 htab->got_header_size = 16;
5493 else if (htab->plt_type == PLT_NEW)
5494 htab->got_header_size = 12;
5495
5496 /* Set up .got offsets for local syms, and space for local dynamic
5497 relocs. */
5498 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5499 {
5500 bfd_signed_vma *local_got;
5501 bfd_signed_vma *end_local_got;
5502 struct plt_entry **local_plt;
5503 struct plt_entry **end_local_plt;
5504 char *lgot_masks;
5505 bfd_size_type locsymcount;
5506 Elf_Internal_Shdr *symtab_hdr;
5507
5508 if (!is_ppc_elf (ibfd))
5509 continue;
5510
5511 for (s = ibfd->sections; s != NULL; s = s->next)
5512 {
5513 struct ppc_elf_dyn_relocs *p;
5514
5515 for (p = ((struct ppc_elf_dyn_relocs *)
5516 elf_section_data (s)->local_dynrel);
5517 p != NULL;
5518 p = p->next)
5519 {
5520 if (!bfd_is_abs_section (p->sec)
5521 && bfd_is_abs_section (p->sec->output_section))
5522 {
5523 /* Input section has been discarded, either because
5524 it is a copy of a linkonce section or due to
5525 linker script /DISCARD/, so we'll be discarding
5526 the relocs too. */
5527 }
5528 else if (htab->is_vxworks
5529 && strcmp (p->sec->output_section->name,
5530 ".tls_vars") == 0)
5531 {
5532 /* Relocations in vxworks .tls_vars sections are
5533 handled specially by the loader. */
5534 }
5535 else if (p->count != 0)
5536 {
5537 asection *sreloc = elf_section_data (p->sec)->sreloc;
5538 if (!htab->elf.dynamic_sections_created)
5539 sreloc = htab->reliplt;
5540 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5541 if ((p->sec->output_section->flags
5542 & (SEC_READONLY | SEC_ALLOC))
5543 == (SEC_READONLY | SEC_ALLOC))
5544 info->flags |= DF_TEXTREL;
5545 }
5546 }
5547 }
5548
5549 local_got = elf_local_got_refcounts (ibfd);
5550 if (!local_got)
5551 continue;
5552
5553 symtab_hdr = &elf_symtab_hdr (ibfd);
5554 locsymcount = symtab_hdr->sh_info;
5555 end_local_got = local_got + locsymcount;
5556 local_plt = (struct plt_entry **) end_local_got;
5557 end_local_plt = local_plt + locsymcount;
5558 lgot_masks = (char *) end_local_plt;
5559 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5560 if (*local_got > 0)
5561 {
5562 unsigned int need = 0;
5563 if ((*lgot_masks & TLS_TLS) != 0)
5564 {
5565 if ((*lgot_masks & TLS_GD) != 0)
5566 need += 8;
5567 if ((*lgot_masks & TLS_LD) != 0)
5568 htab->tlsld_got.refcount += 1;
5569 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5570 need += 4;
5571 if ((*lgot_masks & TLS_DTPREL) != 0)
5572 need += 4;
5573 }
5574 else
5575 need += 4;
5576 if (need == 0)
5577 *local_got = (bfd_vma) -1;
5578 else
5579 {
5580 *local_got = allocate_got (htab, need);
5581 if (info->shared)
5582 htab->relgot->size += (need
5583 * (sizeof (Elf32_External_Rela) / 4));
5584 }
5585 }
5586 else
5587 *local_got = (bfd_vma) -1;
5588
5589 if (htab->is_vxworks)
5590 continue;
5591
5592 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5593 for (; local_plt < end_local_plt; ++local_plt)
5594 {
5595 struct plt_entry *ent;
5596 bfd_boolean doneone = FALSE;
5597 bfd_vma plt_offset = 0, glink_offset = 0;
5598
5599 for (ent = *local_plt; ent != NULL; ent = ent->next)
5600 if (ent->plt.refcount > 0)
5601 {
5602 asection *s = htab->iplt;
5603
5604 if (!doneone)
5605 {
5606 plt_offset = s->size;
5607 s->size += 4;
5608 }
5609 ent->plt.offset = plt_offset;
5610
5611 s = htab->glink;
5612 if (!doneone || info->shared)
5613 {
5614 glink_offset = s->size;
5615 s->size += GLINK_ENTRY_SIZE;
5616 }
5617 ent->glink_offset = glink_offset;
5618
5619 if (!doneone)
5620 {
5621 htab->reliplt->size += sizeof (Elf32_External_Rela);
5622 doneone = TRUE;
5623 }
5624 }
5625 else
5626 ent->plt.offset = (bfd_vma) -1;
5627 }
5628 }
5629
5630 /* Allocate space for global sym dynamic relocs. */
5631 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5632
5633 if (htab->tlsld_got.refcount > 0)
5634 {
5635 htab->tlsld_got.offset = allocate_got (htab, 8);
5636 if (info->shared)
5637 htab->relgot->size += sizeof (Elf32_External_Rela);
5638 }
5639 else
5640 htab->tlsld_got.offset = (bfd_vma) -1;
5641
5642 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5643 {
5644 unsigned int g_o_t = 32768;
5645
5646 /* If we haven't allocated the header, do so now. When we get here,
5647 for old plt/got the got size will be 0 to 32764 (not allocated),
5648 or 32780 to 65536 (header allocated). For new plt/got, the
5649 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5650 if (htab->got->size <= 32768)
5651 {
5652 g_o_t = htab->got->size;
5653 if (htab->plt_type == PLT_OLD)
5654 g_o_t += 4;
5655 htab->got->size += htab->got_header_size;
5656 }
5657
5658 htab->elf.hgot->root.u.def.value = g_o_t;
5659 }
5660 if (info->shared)
5661 {
5662 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5663 if (sda != NULL
5664 && !(sda->root.type == bfd_link_hash_defined
5665 || sda->root.type == bfd_link_hash_defweak))
5666 {
5667 sda->root.type = bfd_link_hash_defined;
5668 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5669 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5670 }
5671 }
5672
5673 if (htab->glink != NULL
5674 && htab->glink->size != 0
5675 && htab->elf.dynamic_sections_created)
5676 {
5677 htab->glink_pltresolve = htab->glink->size;
5678 /* Space for the branch table. */
5679 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5680 /* Pad out to align the start of PLTresolve. */
5681 htab->glink->size += -htab->glink->size & 15;
5682 htab->glink->size += GLINK_PLTRESOLVE;
5683
5684 if (htab->emit_stub_syms)
5685 {
5686 struct elf_link_hash_entry *sh;
5687 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5688 TRUE, FALSE, FALSE);
5689 if (sh == NULL)
5690 return FALSE;
5691 if (sh->root.type == bfd_link_hash_new)
5692 {
5693 sh->root.type = bfd_link_hash_defined;
5694 sh->root.u.def.section = htab->glink;
5695 sh->root.u.def.value = htab->glink_pltresolve;
5696 sh->ref_regular = 1;
5697 sh->def_regular = 1;
5698 sh->ref_regular_nonweak = 1;
5699 sh->forced_local = 1;
5700 sh->non_elf = 0;
5701 }
5702 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5703 TRUE, FALSE, FALSE);
5704 if (sh == NULL)
5705 return FALSE;
5706 if (sh->root.type == bfd_link_hash_new)
5707 {
5708 sh->root.type = bfd_link_hash_defined;
5709 sh->root.u.def.section = htab->glink;
5710 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5711 sh->ref_regular = 1;
5712 sh->def_regular = 1;
5713 sh->ref_regular_nonweak = 1;
5714 sh->forced_local = 1;
5715 sh->non_elf = 0;
5716 }
5717 }
5718 }
5719
5720 /* We've now determined the sizes of the various dynamic sections.
5721 Allocate memory for them. */
5722 relocs = FALSE;
5723 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5724 {
5725 bfd_boolean strip_section = TRUE;
5726
5727 if ((s->flags & SEC_LINKER_CREATED) == 0)
5728 continue;
5729
5730 if (s == htab->plt
5731 || s == htab->got)
5732 {
5733 /* We'd like to strip these sections if they aren't needed, but if
5734 we've exported dynamic symbols from them we must leave them.
5735 It's too late to tell BFD to get rid of the symbols. */
5736 if (htab->elf.hplt != NULL)
5737 strip_section = FALSE;
5738 /* Strip this section if we don't need it; see the
5739 comment below. */
5740 }
5741 else if (s == htab->iplt
5742 || s == htab->glink
5743 || s == htab->sgotplt
5744 || s == htab->sbss
5745 || s == htab->dynbss
5746 || s == htab->dynsbss
5747 || s == htab->sdata[0].section
5748 || s == htab->sdata[1].section)
5749 {
5750 /* Strip these too. */
5751 }
5752 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5753 {
5754 if (s->size != 0)
5755 {
5756 /* Remember whether there are any relocation sections. */
5757 relocs = TRUE;
5758
5759 /* We use the reloc_count field as a counter if we need
5760 to copy relocs into the output file. */
5761 s->reloc_count = 0;
5762 }
5763 }
5764 else
5765 {
5766 /* It's not one of our sections, so don't allocate space. */
5767 continue;
5768 }
5769
5770 if (s->size == 0 && strip_section)
5771 {
5772 /* If we don't need this section, strip it from the
5773 output file. This is mostly to handle .rela.bss and
5774 .rela.plt. We must create both sections in
5775 create_dynamic_sections, because they must be created
5776 before the linker maps input sections to output
5777 sections. The linker does that before
5778 adjust_dynamic_symbol is called, and it is that
5779 function which decides whether anything needs to go
5780 into these sections. */
5781 s->flags |= SEC_EXCLUDE;
5782 continue;
5783 }
5784
5785 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5786 continue;
5787
5788 /* Allocate memory for the section contents. */
5789 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5790 if (s->contents == NULL)
5791 return FALSE;
5792 }
5793
5794 if (htab->elf.dynamic_sections_created)
5795 {
5796 /* Add some entries to the .dynamic section. We fill in the
5797 values later, in ppc_elf_finish_dynamic_sections, but we
5798 must add the entries now so that we get the correct size for
5799 the .dynamic section. The DT_DEBUG entry is filled in by the
5800 dynamic linker and used by the debugger. */
5801 #define add_dynamic_entry(TAG, VAL) \
5802 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5803
5804 if (info->executable)
5805 {
5806 if (!add_dynamic_entry (DT_DEBUG, 0))
5807 return FALSE;
5808 }
5809
5810 if (htab->plt != NULL && htab->plt->size != 0)
5811 {
5812 if (!add_dynamic_entry (DT_PLTGOT, 0)
5813 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5814 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5815 || !add_dynamic_entry (DT_JMPREL, 0))
5816 return FALSE;
5817 }
5818
5819 if (htab->glink != NULL && htab->glink->size != 0)
5820 {
5821 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5822 return FALSE;
5823 }
5824
5825 if (relocs)
5826 {
5827 if (!add_dynamic_entry (DT_RELA, 0)
5828 || !add_dynamic_entry (DT_RELASZ, 0)
5829 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5830 return FALSE;
5831 }
5832
5833 /* If any dynamic relocs apply to a read-only section, then we
5834 need a DT_TEXTREL entry. */
5835 if ((info->flags & DF_TEXTREL) == 0)
5836 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5837 info);
5838
5839 if ((info->flags & DF_TEXTREL) != 0)
5840 {
5841 if (!add_dynamic_entry (DT_TEXTREL, 0))
5842 return FALSE;
5843 }
5844 if (htab->is_vxworks
5845 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5846 return FALSE;
5847 }
5848 #undef add_dynamic_entry
5849
5850 return TRUE;
5851 }
5852
5853 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5854
5855 static bfd_boolean
5856 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5857 {
5858 if (h->plt.plist != NULL
5859 && !h->def_regular
5860 && (!h->pointer_equality_needed
5861 || !h->ref_regular_nonweak))
5862 return FALSE;
5863
5864 return _bfd_elf_hash_symbol (h);
5865 }
5866 \f
5867 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5868
5869 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5870 used for some functions that are allowed to break the ABI). */
5871 static const int shared_stub_entry[] =
5872 {
5873 0x7c0802a6, /* mflr 0 */
5874 0x429f0005, /* bcl 20, 31, .Lxxx */
5875 0x7d8802a6, /* mflr 12 */
5876 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5877 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5878 0x7c0803a6, /* mtlr 0 */
5879 0x7d8903a6, /* mtctr 12 */
5880 0x4e800420, /* bctr */
5881 };
5882
5883 static const int stub_entry[] =
5884 {
5885 0x3d800000, /* lis 12,xxx@ha */
5886 0x398c0000, /* addi 12,12,xxx@l */
5887 0x7d8903a6, /* mtctr 12 */
5888 0x4e800420, /* bctr */
5889 };
5890
5891 static bfd_boolean
5892 ppc_elf_relax_section (bfd *abfd,
5893 asection *isec,
5894 struct bfd_link_info *link_info,
5895 bfd_boolean *again)
5896 {
5897 struct one_fixup
5898 {
5899 struct one_fixup *next;
5900 asection *tsec;
5901 /* Final link, can use the symbol offset. For a
5902 relocatable link we use the symbol's index. */
5903 bfd_vma toff;
5904 bfd_vma trampoff;
5905 };
5906
5907 Elf_Internal_Shdr *symtab_hdr;
5908 bfd_byte *contents = NULL;
5909 Elf_Internal_Sym *isymbuf = NULL;
5910 Elf_Internal_Rela *internal_relocs = NULL;
5911 Elf_Internal_Rela *irel, *irelend;
5912 struct one_fixup *fixups = NULL;
5913 unsigned changes = 0;
5914 struct ppc_elf_link_hash_table *htab;
5915 bfd_size_type trampoff;
5916 asection *got2;
5917
5918 *again = FALSE;
5919
5920 /* Nothing to do if there are no relocations, and no need to do
5921 anything with non-alloc or non-code sections. */
5922 if ((isec->flags & SEC_ALLOC) == 0
5923 || (isec->flags & SEC_CODE) == 0
5924 || (isec->flags & SEC_RELOC) == 0
5925 || isec->reloc_count == 0)
5926 return TRUE;
5927
5928 /* We cannot represent the required PIC relocs in the output, so don't
5929 do anything. The linker doesn't support mixing -shared and -r
5930 anyway. */
5931 if (link_info->relocatable && link_info->shared)
5932 return TRUE;
5933
5934 trampoff = (isec->size + 3) & (bfd_vma) -4;
5935 /* Space for a branch around any trampolines. */
5936 trampoff += 4;
5937
5938 symtab_hdr = &elf_symtab_hdr (abfd);
5939
5940 /* Get a copy of the native relocations. */
5941 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5942 link_info->keep_memory);
5943 if (internal_relocs == NULL)
5944 goto error_return;
5945
5946 htab = ppc_elf_hash_table (link_info);
5947 got2 = bfd_get_section_by_name (abfd, ".got2");
5948
5949 irelend = internal_relocs + isec->reloc_count;
5950 for (irel = internal_relocs; irel < irelend; irel++)
5951 {
5952 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5953 bfd_vma reladdr, toff, roff;
5954 asection *tsec;
5955 struct one_fixup *f;
5956 size_t insn_offset = 0;
5957 bfd_vma max_branch_offset, val;
5958 bfd_byte *hit_addr;
5959 unsigned long t0;
5960 struct elf_link_hash_entry *h;
5961 struct plt_entry **plist;
5962 unsigned char sym_type;
5963
5964 switch (r_type)
5965 {
5966 case R_PPC_REL24:
5967 case R_PPC_LOCAL24PC:
5968 case R_PPC_PLTREL24:
5969 max_branch_offset = 1 << 25;
5970 break;
5971
5972 case R_PPC_REL14:
5973 case R_PPC_REL14_BRTAKEN:
5974 case R_PPC_REL14_BRNTAKEN:
5975 max_branch_offset = 1 << 15;
5976 break;
5977
5978 default:
5979 continue;
5980 }
5981
5982 /* Get the value of the symbol referred to by the reloc. */
5983 h = NULL;
5984 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5985 {
5986 /* A local symbol. */
5987 Elf_Internal_Sym *isym;
5988
5989 /* Read this BFD's local symbols. */
5990 if (isymbuf == NULL)
5991 {
5992 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5993 if (isymbuf == NULL)
5994 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5995 symtab_hdr->sh_info, 0,
5996 NULL, NULL, NULL);
5997 if (isymbuf == 0)
5998 goto error_return;
5999 }
6000 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6001 if (isym->st_shndx == SHN_UNDEF)
6002 tsec = bfd_und_section_ptr;
6003 else if (isym->st_shndx == SHN_ABS)
6004 tsec = bfd_abs_section_ptr;
6005 else if (isym->st_shndx == SHN_COMMON)
6006 tsec = bfd_com_section_ptr;
6007 else
6008 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6009
6010 toff = isym->st_value;
6011 sym_type = ELF_ST_TYPE (isym->st_info);
6012 }
6013 else
6014 {
6015 /* Global symbol handling. */
6016 unsigned long indx;
6017
6018 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6019 h = elf_sym_hashes (abfd)[indx];
6020
6021 while (h->root.type == bfd_link_hash_indirect
6022 || h->root.type == bfd_link_hash_warning)
6023 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6024
6025 if (h->root.type == bfd_link_hash_defined
6026 || h->root.type == bfd_link_hash_defweak)
6027 {
6028 tsec = h->root.u.def.section;
6029 toff = h->root.u.def.value;
6030 }
6031 else if (h->root.type == bfd_link_hash_undefined
6032 || h->root.type == bfd_link_hash_undefweak)
6033 {
6034 tsec = bfd_und_section_ptr;
6035 toff = link_info->relocatable ? indx : 0;
6036 }
6037 else
6038 continue;
6039
6040 sym_type = h->type;
6041 }
6042
6043 /* The condition here under which we call find_plt_ent must
6044 match that in relocate_section. If we call find_plt_ent here
6045 but not in relocate_section, or vice versa, then the branch
6046 destination used here may be incorrect. */
6047 plist = NULL;
6048 if (h != NULL)
6049 {
6050 /* We know is_branch_reloc (r_type) is true. */
6051 if (h->type == STT_GNU_IFUNC
6052 || r_type == R_PPC_PLTREL24)
6053 plist = &h->plt.plist;
6054 }
6055 else if (sym_type == STT_GNU_IFUNC
6056 && elf_local_got_offsets (abfd) != NULL)
6057 {
6058 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6059 struct plt_entry **local_plt = (struct plt_entry **)
6060 (local_got_offsets + symtab_hdr->sh_info);
6061 plist = local_plt + ELF32_R_SYM (irel->r_info);
6062 }
6063 if (plist != NULL)
6064 {
6065 bfd_vma addend = 0;
6066 struct plt_entry *ent;
6067
6068 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6069 addend = irel->r_addend;
6070 ent = find_plt_ent (plist, got2, addend);
6071 if (ent != NULL)
6072 {
6073 if (htab->plt_type == PLT_NEW
6074 || h == NULL
6075 || !htab->elf.dynamic_sections_created
6076 || h->dynindx == -1)
6077 {
6078 tsec = htab->glink;
6079 toff = ent->glink_offset;
6080 }
6081 else
6082 {
6083 tsec = htab->plt;
6084 toff = ent->plt.offset;
6085 }
6086 }
6087 }
6088
6089 /* If the branch and target are in the same section, you have
6090 no hope of adding stubs. We'll error out later should the
6091 branch overflow. */
6092 if (tsec == isec)
6093 continue;
6094
6095 /* There probably isn't any reason to handle symbols in
6096 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6097 attribute for a code section, and we are only looking at
6098 branches. However, implement it correctly here as a
6099 reference for other target relax_section functions. */
6100 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6101 {
6102 /* At this stage in linking, no SEC_MERGE symbol has been
6103 adjusted, so all references to such symbols need to be
6104 passed through _bfd_merged_section_offset. (Later, in
6105 relocate_section, all SEC_MERGE symbols *except* for
6106 section symbols have been adjusted.)
6107
6108 gas may reduce relocations against symbols in SEC_MERGE
6109 sections to a relocation against the section symbol when
6110 the original addend was zero. When the reloc is against
6111 a section symbol we should include the addend in the
6112 offset passed to _bfd_merged_section_offset, since the
6113 location of interest is the original symbol. On the
6114 other hand, an access to "sym+addend" where "sym" is not
6115 a section symbol should not include the addend; Such an
6116 access is presumed to be an offset from "sym"; The
6117 location of interest is just "sym". */
6118 if (sym_type == STT_SECTION)
6119 toff += irel->r_addend;
6120
6121 toff = _bfd_merged_section_offset (abfd, &tsec,
6122 elf_section_data (tsec)->sec_info,
6123 toff);
6124
6125 if (sym_type != STT_SECTION)
6126 toff += irel->r_addend;
6127 }
6128 /* PLTREL24 addends are special. */
6129 else if (r_type != R_PPC_PLTREL24)
6130 toff += irel->r_addend;
6131
6132 /* Attempted -shared link of non-pic code loses. */
6133 if (tsec->output_section == NULL)
6134 continue;
6135
6136 roff = irel->r_offset;
6137 reladdr = isec->output_section->vma + isec->output_offset + roff;
6138
6139 /* If the branch is in range, no need to do anything. */
6140 if (tsec != bfd_und_section_ptr
6141 && (!link_info->relocatable
6142 /* A relocatable link may have sections moved during
6143 final link, so do not presume they remain in range. */
6144 || tsec->output_section == isec->output_section))
6145 {
6146 bfd_vma symaddr, reladdr;
6147
6148 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6149 reladdr = isec->output_section->vma + isec->output_offset + roff;
6150 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6151 continue;
6152 }
6153
6154 /* Look for an existing fixup to this address. */
6155 for (f = fixups; f ; f = f->next)
6156 if (f->tsec == tsec && f->toff == toff)
6157 break;
6158
6159 if (f == NULL)
6160 {
6161 size_t size;
6162 unsigned long stub_rtype;
6163
6164 val = trampoff - roff;
6165 if (val >= max_branch_offset)
6166 /* Oh dear, we can't reach a trampoline. Don't try to add
6167 one. We'll report an error later. */
6168 continue;
6169
6170 if (link_info->shared)
6171 {
6172 size = 4 * ARRAY_SIZE (shared_stub_entry);
6173 insn_offset = 12;
6174 stub_rtype = R_PPC_RELAX32PC;
6175 }
6176 else
6177 {
6178 size = 4 * ARRAY_SIZE (stub_entry);
6179 insn_offset = 0;
6180 stub_rtype = R_PPC_RELAX32;
6181 }
6182
6183 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
6184 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
6185 abort ();
6186 if (tsec == htab->plt
6187 || tsec == htab->glink)
6188 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
6189
6190 /* Hijack the old relocation. Since we need two
6191 relocations for this use a "composite" reloc. */
6192 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6193 stub_rtype);
6194 irel->r_offset = trampoff + insn_offset;
6195 if (r_type == R_PPC_PLTREL24)
6196 irel->r_addend = 0;
6197
6198 /* Record the fixup so we don't do it again this section. */
6199 f = bfd_malloc (sizeof (*f));
6200 f->next = fixups;
6201 f->tsec = tsec;
6202 f->toff = toff;
6203 f->trampoff = trampoff;
6204 fixups = f;
6205
6206 trampoff += size;
6207 changes++;
6208 }
6209 else
6210 {
6211 val = f->trampoff - roff;
6212 if (val >= max_branch_offset)
6213 continue;
6214
6215 /* Nop out the reloc, since we're finalizing things here. */
6216 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6217 }
6218
6219 /* Get the section contents. */
6220 if (contents == NULL)
6221 {
6222 /* Get cached copy if it exists. */
6223 if (elf_section_data (isec)->this_hdr.contents != NULL)
6224 contents = elf_section_data (isec)->this_hdr.contents;
6225 else
6226 {
6227 /* Go get them off disk. */
6228 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6229 goto error_return;
6230 }
6231 }
6232
6233 /* Fix up the existing branch to hit the trampoline. */
6234 hit_addr = contents + roff;
6235 switch (r_type)
6236 {
6237 case R_PPC_REL24:
6238 case R_PPC_LOCAL24PC:
6239 case R_PPC_PLTREL24:
6240 t0 = bfd_get_32 (abfd, hit_addr);
6241 t0 &= ~0x3fffffc;
6242 t0 |= val & 0x3fffffc;
6243 bfd_put_32 (abfd, t0, hit_addr);
6244 break;
6245
6246 case R_PPC_REL14:
6247 case R_PPC_REL14_BRTAKEN:
6248 case R_PPC_REL14_BRNTAKEN:
6249 t0 = bfd_get_32 (abfd, hit_addr);
6250 t0 &= ~0xfffc;
6251 t0 |= val & 0xfffc;
6252 bfd_put_32 (abfd, t0, hit_addr);
6253 break;
6254 }
6255 }
6256
6257 /* Write out the trampolines. */
6258 if (fixups != NULL)
6259 {
6260 const int *stub;
6261 bfd_byte *dest;
6262 bfd_vma val;
6263 int i, size;
6264
6265 do
6266 {
6267 struct one_fixup *f = fixups;
6268 fixups = fixups->next;
6269 free (f);
6270 }
6271 while (fixups);
6272
6273 contents = bfd_realloc_or_free (contents, trampoff);
6274 if (contents == NULL)
6275 goto error_return;
6276
6277 isec->size = (isec->size + 3) & (bfd_vma) -4;
6278 /* Branch around the trampolines. */
6279 val = B + trampoff - isec->size;
6280 dest = contents + isec->size;
6281 isec->size = trampoff;
6282 bfd_put_32 (abfd, val, dest);
6283 dest += 4;
6284
6285 if (link_info->shared)
6286 {
6287 stub = shared_stub_entry;
6288 size = ARRAY_SIZE (shared_stub_entry);
6289 }
6290 else
6291 {
6292 stub = stub_entry;
6293 size = ARRAY_SIZE (stub_entry);
6294 }
6295
6296 i = 0;
6297 while (dest < contents + trampoff)
6298 {
6299 bfd_put_32 (abfd, stub[i], dest);
6300 i++;
6301 if (i == size)
6302 i = 0;
6303 dest += 4;
6304 }
6305 BFD_ASSERT (i == 0);
6306 }
6307
6308 if (isymbuf != NULL
6309 && symtab_hdr->contents != (unsigned char *) isymbuf)
6310 {
6311 if (! link_info->keep_memory)
6312 free (isymbuf);
6313 else
6314 {
6315 /* Cache the symbols for elf_link_input_bfd. */
6316 symtab_hdr->contents = (unsigned char *) isymbuf;
6317 }
6318 }
6319
6320 if (contents != NULL
6321 && elf_section_data (isec)->this_hdr.contents != contents)
6322 {
6323 if (!changes && !link_info->keep_memory)
6324 free (contents);
6325 else
6326 {
6327 /* Cache the section contents for elf_link_input_bfd. */
6328 elf_section_data (isec)->this_hdr.contents = contents;
6329 }
6330 }
6331
6332 if (changes != 0)
6333 {
6334 /* Append sufficient NOP relocs so we can write out relocation
6335 information for the trampolines. */
6336 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6337 * sizeof (*new_relocs));
6338 unsigned ix;
6339
6340 if (!new_relocs)
6341 goto error_return;
6342 memcpy (new_relocs, internal_relocs,
6343 isec->reloc_count * sizeof (*new_relocs));
6344 for (ix = changes; ix--;)
6345 {
6346 irel = new_relocs + ix + isec->reloc_count;
6347
6348 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6349 }
6350 if (internal_relocs != elf_section_data (isec)->relocs)
6351 free (internal_relocs);
6352 elf_section_data (isec)->relocs = new_relocs;
6353 isec->reloc_count += changes;
6354 elf_section_data (isec)->rel_hdr.sh_size
6355 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6356 }
6357 else if (elf_section_data (isec)->relocs != internal_relocs)
6358 free (internal_relocs);
6359
6360 *again = changes != 0;
6361 if (!*again && link_info->relocatable)
6362 {
6363 /* Convert the internal relax relocs to external form. */
6364 for (irel = internal_relocs; irel < irelend; irel++)
6365 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6366 {
6367 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6368
6369 /* Rewrite the reloc and convert one of the trailing nop
6370 relocs to describe this relocation. */
6371 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6372 /* The relocs are at the bottom 2 bytes */
6373 irel[0].r_offset += 2;
6374 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6375 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6376 irel[1].r_offset += 4;
6377 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6378 irel++;
6379 }
6380 }
6381
6382 return TRUE;
6383
6384 error_return:
6385 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6386 free (isymbuf);
6387 if (contents != NULL
6388 && elf_section_data (isec)->this_hdr.contents != contents)
6389 free (contents);
6390 if (internal_relocs != NULL
6391 && elf_section_data (isec)->relocs != internal_relocs)
6392 free (internal_relocs);
6393 return FALSE;
6394 }
6395 \f
6396 /* What to do when ld finds relocations against symbols defined in
6397 discarded sections. */
6398
6399 static unsigned int
6400 ppc_elf_action_discarded (asection *sec)
6401 {
6402 if (strcmp (".fixup", sec->name) == 0)
6403 return 0;
6404
6405 if (strcmp (".got2", sec->name) == 0)
6406 return 0;
6407
6408 return _bfd_elf_default_action_discarded (sec);
6409 }
6410 \f
6411 /* Fill in the address for a pointer generated in a linker section. */
6412
6413 static bfd_vma
6414 elf_finish_pointer_linker_section (bfd *input_bfd,
6415 elf_linker_section_t *lsect,
6416 struct elf_link_hash_entry *h,
6417 bfd_vma relocation,
6418 const Elf_Internal_Rela *rel)
6419 {
6420 elf_linker_section_pointers_t *linker_section_ptr;
6421
6422 BFD_ASSERT (lsect != NULL);
6423
6424 if (h != NULL)
6425 {
6426 /* Handle global symbol. */
6427 struct ppc_elf_link_hash_entry *eh;
6428
6429 eh = (struct ppc_elf_link_hash_entry *) h;
6430 BFD_ASSERT (eh->elf.def_regular);
6431 linker_section_ptr = eh->linker_section_pointer;
6432 }
6433 else
6434 {
6435 /* Handle local symbol. */
6436 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6437
6438 BFD_ASSERT (is_ppc_elf (input_bfd));
6439 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6440 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6441 }
6442
6443 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6444 rel->r_addend,
6445 lsect);
6446 BFD_ASSERT (linker_section_ptr != NULL);
6447
6448 /* Offset will always be a multiple of four, so use the bottom bit
6449 as a "written" flag. */
6450 if ((linker_section_ptr->offset & 1) == 0)
6451 {
6452 bfd_put_32 (lsect->section->owner,
6453 relocation + linker_section_ptr->addend,
6454 lsect->section->contents + linker_section_ptr->offset);
6455 linker_section_ptr->offset += 1;
6456 }
6457
6458 relocation = (lsect->section->output_section->vma
6459 + lsect->section->output_offset
6460 + linker_section_ptr->offset - 1
6461 - SYM_VAL (lsect->sym));
6462
6463 #ifdef DEBUG
6464 fprintf (stderr,
6465 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6466 lsect->name, (long) relocation, (long) relocation);
6467 #endif
6468
6469 return relocation;
6470 }
6471
6472 #define PPC_LO(v) ((v) & 0xffff)
6473 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6474 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6475
6476 static void
6477 write_glink_stub (struct plt_entry *ent, asection *plt_sec,
6478 struct bfd_link_info *info)
6479 {
6480 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6481 bfd *output_bfd = info->output_bfd;
6482 bfd_vma plt;
6483 unsigned char *p;
6484
6485 plt = ((ent->plt.offset & ~1)
6486 + plt_sec->output_section->vma
6487 + plt_sec->output_offset);
6488 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6489
6490 if (info->shared)
6491 {
6492 bfd_vma got = 0;
6493
6494 if (ent->addend >= 32768)
6495 got = (ent->addend
6496 + ent->sec->output_section->vma
6497 + ent->sec->output_offset);
6498 else if (htab->elf.hgot != NULL)
6499 got = SYM_VAL (htab->elf.hgot);
6500
6501 plt -= got;
6502
6503 if (plt + 0x8000 < 0x10000)
6504 {
6505 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6506 p += 4;
6507 bfd_put_32 (output_bfd, MTCTR_11, p);
6508 p += 4;
6509 bfd_put_32 (output_bfd, BCTR, p);
6510 p += 4;
6511 bfd_put_32 (output_bfd, NOP, p);
6512 p += 4;
6513 }
6514 else
6515 {
6516 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6517 p += 4;
6518 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6519 p += 4;
6520 bfd_put_32 (output_bfd, MTCTR_11, p);
6521 p += 4;
6522 bfd_put_32 (output_bfd, BCTR, p);
6523 p += 4;
6524 }
6525 }
6526 else
6527 {
6528 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6529 p += 4;
6530 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6531 p += 4;
6532 bfd_put_32 (output_bfd, MTCTR_11, p);
6533 p += 4;
6534 bfd_put_32 (output_bfd, BCTR, p);
6535 p += 4;
6536 }
6537 }
6538
6539 /* Return true if symbol is defined statically. */
6540
6541 static bfd_boolean
6542 is_static_defined (struct elf_link_hash_entry *h)
6543 {
6544 return ((h->root.type == bfd_link_hash_defined
6545 || h->root.type == bfd_link_hash_defweak)
6546 && h->root.u.def.section != NULL
6547 && h->root.u.def.section->output_section != NULL);
6548 }
6549
6550 /* The RELOCATE_SECTION function is called by the ELF backend linker
6551 to handle the relocations for a section.
6552
6553 The relocs are always passed as Rela structures; if the section
6554 actually uses Rel structures, the r_addend field will always be
6555 zero.
6556
6557 This function is responsible for adjust the section contents as
6558 necessary, and (if using Rela relocs and generating a
6559 relocatable output file) adjusting the reloc addend as
6560 necessary.
6561
6562 This function does not have to worry about setting the reloc
6563 address or the reloc symbol index.
6564
6565 LOCAL_SYMS is a pointer to the swapped in local symbols.
6566
6567 LOCAL_SECTIONS is an array giving the section in the input file
6568 corresponding to the st_shndx field of each local symbol.
6569
6570 The global hash table entry for the global symbols can be found
6571 via elf_sym_hashes (input_bfd).
6572
6573 When generating relocatable output, this function must handle
6574 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6575 going to be the section symbol corresponding to the output
6576 section, which means that the addend must be adjusted
6577 accordingly. */
6578
6579 static bfd_boolean
6580 ppc_elf_relocate_section (bfd *output_bfd,
6581 struct bfd_link_info *info,
6582 bfd *input_bfd,
6583 asection *input_section,
6584 bfd_byte *contents,
6585 Elf_Internal_Rela *relocs,
6586 Elf_Internal_Sym *local_syms,
6587 asection **local_sections)
6588 {
6589 Elf_Internal_Shdr *symtab_hdr;
6590 struct elf_link_hash_entry **sym_hashes;
6591 struct ppc_elf_link_hash_table *htab;
6592 Elf_Internal_Rela *rel;
6593 Elf_Internal_Rela *relend;
6594 Elf_Internal_Rela outrel;
6595 bfd_byte *loc;
6596 asection *got2, *sreloc = NULL;
6597 bfd_vma *local_got_offsets;
6598 bfd_boolean ret = TRUE;
6599 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6600 bfd_boolean is_vxworks_tls;
6601
6602 #ifdef DEBUG
6603 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6604 "%ld relocations%s",
6605 input_bfd, input_section,
6606 (long) input_section->reloc_count,
6607 (info->relocatable) ? " (relocatable)" : "");
6608 #endif
6609
6610 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6611
6612 /* Initialize howto table if not already done. */
6613 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6614 ppc_elf_howto_init ();
6615
6616 htab = ppc_elf_hash_table (info);
6617 local_got_offsets = elf_local_got_offsets (input_bfd);
6618 symtab_hdr = &elf_symtab_hdr (input_bfd);
6619 sym_hashes = elf_sym_hashes (input_bfd);
6620 /* We have to handle relocations in vxworks .tls_vars sections
6621 specially, because the dynamic loader is 'weird'. */
6622 is_vxworks_tls = (htab->is_vxworks && info->shared
6623 && !strcmp (input_section->output_section->name,
6624 ".tls_vars"));
6625 rel = relocs;
6626 relend = relocs + input_section->reloc_count;
6627 for (; rel < relend; rel++)
6628 {
6629 enum elf_ppc_reloc_type r_type;
6630 bfd_vma addend;
6631 bfd_reloc_status_type r;
6632 Elf_Internal_Sym *sym;
6633 asection *sec;
6634 struct elf_link_hash_entry *h;
6635 const char *sym_name;
6636 reloc_howto_type *howto;
6637 unsigned long r_symndx;
6638 bfd_vma relocation;
6639 bfd_vma branch_bit, insn, from;
6640 bfd_boolean unresolved_reloc;
6641 bfd_boolean warned;
6642 unsigned int tls_type, tls_mask, tls_gd;
6643 struct plt_entry **ifunc;
6644
6645 r_type = ELF32_R_TYPE (rel->r_info);
6646 sym = NULL;
6647 sec = NULL;
6648 h = NULL;
6649 unresolved_reloc = FALSE;
6650 warned = FALSE;
6651 r_symndx = ELF32_R_SYM (rel->r_info);
6652
6653 if (r_symndx < symtab_hdr->sh_info)
6654 {
6655 sym = local_syms + r_symndx;
6656 sec = local_sections[r_symndx];
6657 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6658
6659 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6660 }
6661 else
6662 {
6663 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6664 r_symndx, symtab_hdr, sym_hashes,
6665 h, sec, relocation,
6666 unresolved_reloc, warned);
6667
6668 sym_name = h->root.root.string;
6669 }
6670
6671 if (sec != NULL && elf_discarded_section (sec))
6672 {
6673 /* For relocs against symbols from removed linkonce sections,
6674 or sections discarded by a linker script, we just want the
6675 section contents zeroed. Avoid any special processing. */
6676 howto = NULL;
6677 if (r_type < R_PPC_max)
6678 howto = ppc_elf_howto_table[r_type];
6679 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6680 rel->r_info = 0;
6681 rel->r_addend = 0;
6682 continue;
6683 }
6684
6685 if (info->relocatable)
6686 {
6687 if (got2 != NULL
6688 && r_type == R_PPC_PLTREL24
6689 && rel->r_addend >= 32768)
6690 {
6691 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6692 addend specifies the GOT pointer offset within .got2. */
6693 rel->r_addend += got2->output_offset;
6694 }
6695 continue;
6696 }
6697
6698 /* TLS optimizations. Replace instruction sequences and relocs
6699 based on information we collected in tls_optimize. We edit
6700 RELOCS so that --emit-relocs will output something sensible
6701 for the final instruction stream. */
6702 tls_mask = 0;
6703 tls_gd = 0;
6704 if (h != NULL)
6705 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6706 else if (local_got_offsets != NULL)
6707 {
6708 struct plt_entry **local_plt;
6709 char *lgot_masks;
6710 local_plt
6711 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6712 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6713 tls_mask = lgot_masks[r_symndx];
6714 }
6715
6716 /* Ensure reloc mapping code below stays sane. */
6717 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6718 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6719 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6720 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6721 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6722 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6723 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6724 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6725 abort ();
6726 switch (r_type)
6727 {
6728 default:
6729 break;
6730
6731 case R_PPC_GOT_TPREL16:
6732 case R_PPC_GOT_TPREL16_LO:
6733 if ((tls_mask & TLS_TLS) != 0
6734 && (tls_mask & TLS_TPREL) == 0)
6735 {
6736 bfd_vma insn;
6737 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6738 insn &= 31 << 21;
6739 insn |= 0x3c020000; /* addis 0,2,0 */
6740 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6741 r_type = R_PPC_TPREL16_HA;
6742 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6743 }
6744 break;
6745
6746 case R_PPC_TLS:
6747 if ((tls_mask & TLS_TLS) != 0
6748 && (tls_mask & TLS_TPREL) == 0)
6749 {
6750 bfd_vma insn, rtra;
6751 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6752 if ((insn & ((31 << 26) | (31 << 11)))
6753 == ((31 << 26) | (2 << 11)))
6754 rtra = insn & ((1 << 26) - (1 << 16));
6755 else if ((insn & ((31 << 26) | (31 << 16)))
6756 == ((31 << 26) | (2 << 16)))
6757 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6758 else
6759 abort ();
6760 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6761 /* add -> addi. */
6762 insn = 14 << 26;
6763 else if ((insn & (31 << 1)) == 23 << 1
6764 && ((insn & (31 << 6)) < 14 << 6
6765 || ((insn & (31 << 6)) >= 16 << 6
6766 && (insn & (31 << 6)) < 24 << 6)))
6767 /* load and store indexed -> dform. */
6768 insn = (32 | ((insn >> 6) & 31)) << 26;
6769 else if ((insn & (31 << 1)) == 21 << 1
6770 && (insn & (0x1a << 6)) == 0)
6771 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6772 insn = (((58 | ((insn >> 6) & 4)) << 26)
6773 | ((insn >> 6) & 1));
6774 else if ((insn & (31 << 1)) == 21 << 1
6775 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6776 /* lwax -> lwa. */
6777 insn = (58 << 26) | 2;
6778 else
6779 abort ();
6780 insn |= rtra;
6781 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6782 r_type = R_PPC_TPREL16_LO;
6783 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6784
6785 /* Was PPC_TLS which sits on insn boundary, now
6786 PPC_TPREL16_LO which is at low-order half-word. */
6787 rel->r_offset += d_offset;
6788 }
6789 break;
6790
6791 case R_PPC_GOT_TLSGD16_HI:
6792 case R_PPC_GOT_TLSGD16_HA:
6793 tls_gd = TLS_TPRELGD;
6794 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6795 goto tls_gdld_hi;
6796 break;
6797
6798 case R_PPC_GOT_TLSLD16_HI:
6799 case R_PPC_GOT_TLSLD16_HA:
6800 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6801 {
6802 tls_gdld_hi:
6803 if ((tls_mask & tls_gd) != 0)
6804 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6805 + R_PPC_GOT_TPREL16);
6806 else
6807 {
6808 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6809 rel->r_offset -= d_offset;
6810 r_type = R_PPC_NONE;
6811 }
6812 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6813 }
6814 break;
6815
6816 case R_PPC_GOT_TLSGD16:
6817 case R_PPC_GOT_TLSGD16_LO:
6818 tls_gd = TLS_TPRELGD;
6819 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6820 goto tls_ldgd_opt;
6821 break;
6822
6823 case R_PPC_GOT_TLSLD16:
6824 case R_PPC_GOT_TLSLD16_LO:
6825 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6826 {
6827 unsigned int insn1, insn2;
6828 bfd_vma offset;
6829
6830 tls_ldgd_opt:
6831 offset = (bfd_vma) -1;
6832 /* If not using the newer R_PPC_TLSGD/LD to mark
6833 __tls_get_addr calls, we must trust that the call
6834 stays with its arg setup insns, ie. that the next
6835 reloc is the __tls_get_addr call associated with
6836 the current reloc. Edit both insns. */
6837 if (input_section->has_tls_get_addr_call
6838 && rel + 1 < relend
6839 && branch_reloc_hash_match (input_bfd, rel + 1,
6840 htab->tls_get_addr))
6841 offset = rel[1].r_offset;
6842 if ((tls_mask & tls_gd) != 0)
6843 {
6844 /* IE */
6845 insn1 = bfd_get_32 (output_bfd,
6846 contents + rel->r_offset - d_offset);
6847 insn1 &= (1 << 26) - 1;
6848 insn1 |= 32 << 26; /* lwz */
6849 if (offset != (bfd_vma) -1)
6850 {
6851 rel[1].r_info
6852 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6853 R_PPC_NONE);
6854 insn2 = 0x7c631214; /* add 3,3,2 */
6855 bfd_put_32 (output_bfd, insn2, contents + offset);
6856 }
6857 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6858 + R_PPC_GOT_TPREL16);
6859 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6860 }
6861 else
6862 {
6863 /* LE */
6864 insn1 = 0x3c620000; /* addis 3,2,0 */
6865 if (tls_gd == 0)
6866 {
6867 /* Was an LD reloc. */
6868 for (r_symndx = 0;
6869 r_symndx < symtab_hdr->sh_info;
6870 r_symndx++)
6871 if (local_sections[r_symndx] == sec)
6872 break;
6873 if (r_symndx >= symtab_hdr->sh_info)
6874 r_symndx = 0;
6875 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6876 if (r_symndx != 0)
6877 rel->r_addend -= (local_syms[r_symndx].st_value
6878 + sec->output_offset
6879 + sec->output_section->vma);
6880 }
6881 r_type = R_PPC_TPREL16_HA;
6882 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6883 if (offset != (bfd_vma) -1)
6884 {
6885 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6886 rel[1].r_offset = offset + d_offset;
6887 rel[1].r_addend = rel->r_addend;
6888 insn2 = 0x38630000; /* addi 3,3,0 */
6889 bfd_put_32 (output_bfd, insn2, contents + offset);
6890 }
6891 }
6892 bfd_put_32 (output_bfd, insn1,
6893 contents + rel->r_offset - d_offset);
6894 if (tls_gd == 0)
6895 {
6896 /* We changed the symbol on an LD reloc. Start over
6897 in order to get h, sym, sec etc. right. */
6898 rel--;
6899 continue;
6900 }
6901 }
6902 break;
6903
6904 case R_PPC_TLSGD:
6905 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6906 {
6907 unsigned int insn2;
6908 bfd_vma offset = rel->r_offset;
6909
6910 if ((tls_mask & TLS_TPRELGD) != 0)
6911 {
6912 /* IE */
6913 r_type = R_PPC_NONE;
6914 insn2 = 0x7c631214; /* add 3,3,2 */
6915 }
6916 else
6917 {
6918 /* LE */
6919 r_type = R_PPC_TPREL16_LO;
6920 rel->r_offset += d_offset;
6921 insn2 = 0x38630000; /* addi 3,3,0 */
6922 }
6923 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6924 bfd_put_32 (output_bfd, insn2, contents + offset);
6925 /* Zap the reloc on the _tls_get_addr call too. */
6926 BFD_ASSERT (offset == rel[1].r_offset);
6927 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6928 R_PPC_NONE);
6929 }
6930 break;
6931
6932 case R_PPC_TLSLD:
6933 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6934 {
6935 unsigned int insn2;
6936
6937 for (r_symndx = 0;
6938 r_symndx < symtab_hdr->sh_info;
6939 r_symndx++)
6940 if (local_sections[r_symndx] == sec)
6941 break;
6942 if (r_symndx >= symtab_hdr->sh_info)
6943 r_symndx = 0;
6944 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6945 if (r_symndx != 0)
6946 rel->r_addend -= (local_syms[r_symndx].st_value
6947 + sec->output_offset
6948 + sec->output_section->vma);
6949
6950 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6951 rel->r_offset += d_offset;
6952 insn2 = 0x38630000; /* addi 3,3,0 */
6953 bfd_put_32 (output_bfd, insn2,
6954 contents + rel->r_offset - d_offset);
6955 /* Zap the reloc on the _tls_get_addr call too. */
6956 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
6957 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6958 R_PPC_NONE);
6959 rel--;
6960 continue;
6961 }
6962 break;
6963 }
6964
6965 /* Handle other relocations that tweak non-addend part of insn. */
6966 branch_bit = 0;
6967 switch (r_type)
6968 {
6969 default:
6970 break;
6971
6972 /* Branch taken prediction relocations. */
6973 case R_PPC_ADDR14_BRTAKEN:
6974 case R_PPC_REL14_BRTAKEN:
6975 branch_bit = BRANCH_PREDICT_BIT;
6976 /* Fall thru */
6977
6978 /* Branch not taken prediction relocations. */
6979 case R_PPC_ADDR14_BRNTAKEN:
6980 case R_PPC_REL14_BRNTAKEN:
6981 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6982 insn &= ~BRANCH_PREDICT_BIT;
6983 insn |= branch_bit;
6984
6985 from = (rel->r_offset
6986 + input_section->output_offset
6987 + input_section->output_section->vma);
6988
6989 /* Invert 'y' bit if not the default. */
6990 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6991 insn ^= BRANCH_PREDICT_BIT;
6992
6993 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6994 break;
6995 }
6996
6997 ifunc = NULL;
6998 if (!htab->is_vxworks)
6999 {
7000 struct plt_entry *ent;
7001
7002 if (h != NULL)
7003 {
7004 if (h->type == STT_GNU_IFUNC)
7005 ifunc = &h->plt.plist;
7006 }
7007 else if (local_got_offsets != NULL
7008 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7009 {
7010 struct plt_entry **local_plt;
7011
7012 local_plt = (struct plt_entry **) (local_got_offsets
7013 + symtab_hdr->sh_info);
7014 ifunc = local_plt + r_symndx;
7015 }
7016
7017 ent = NULL;
7018 if (ifunc != NULL
7019 && (!info->shared
7020 || is_branch_reloc (r_type)))
7021 {
7022 addend = 0;
7023 if (r_type == R_PPC_PLTREL24 && info->shared)
7024 addend = rel->r_addend;
7025 ent = find_plt_ent (ifunc, got2, addend);
7026 }
7027 if (ent != NULL)
7028 {
7029 if (h == NULL && (ent->plt.offset & 1) == 0)
7030 {
7031 Elf_Internal_Rela rela;
7032 bfd_byte *loc;
7033
7034 rela.r_offset = (htab->iplt->output_section->vma
7035 + htab->iplt->output_offset
7036 + ent->plt.offset);
7037 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7038 rela.r_addend = relocation;
7039 loc = htab->reliplt->contents;
7040 loc += (htab->reliplt->reloc_count++
7041 * sizeof (Elf32_External_Rela));
7042 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7043
7044 ent->plt.offset |= 1;
7045 }
7046 if (h == NULL && (ent->glink_offset & 1) == 0)
7047 {
7048 write_glink_stub (ent, htab->iplt, info);
7049 ent->glink_offset |= 1;
7050 }
7051
7052 unresolved_reloc = FALSE;
7053 if (htab->plt_type == PLT_NEW
7054 || !htab->elf.dynamic_sections_created
7055 || h == NULL)
7056 relocation = (htab->glink->output_section->vma
7057 + htab->glink->output_offset
7058 + (ent->glink_offset & ~1));
7059 else
7060 relocation = (htab->plt->output_section->vma
7061 + htab->plt->output_offset
7062 + ent->plt.offset);
7063 }
7064 }
7065
7066 addend = rel->r_addend;
7067 tls_type = 0;
7068 howto = NULL;
7069 if (r_type < R_PPC_max)
7070 howto = ppc_elf_howto_table[r_type];
7071 switch (r_type)
7072 {
7073 default:
7074 (*_bfd_error_handler)
7075 (_("%B: unknown relocation type %d for symbol %s"),
7076 input_bfd, (int) r_type, sym_name);
7077
7078 bfd_set_error (bfd_error_bad_value);
7079 ret = FALSE;
7080 continue;
7081
7082 case R_PPC_NONE:
7083 case R_PPC_TLS:
7084 case R_PPC_TLSGD:
7085 case R_PPC_TLSLD:
7086 case R_PPC_EMB_MRKREF:
7087 case R_PPC_GNU_VTINHERIT:
7088 case R_PPC_GNU_VTENTRY:
7089 continue;
7090
7091 /* GOT16 relocations. Like an ADDR16 using the symbol's
7092 address in the GOT as relocation value instead of the
7093 symbol's value itself. Also, create a GOT entry for the
7094 symbol and put the symbol value there. */
7095 case R_PPC_GOT_TLSGD16:
7096 case R_PPC_GOT_TLSGD16_LO:
7097 case R_PPC_GOT_TLSGD16_HI:
7098 case R_PPC_GOT_TLSGD16_HA:
7099 tls_type = TLS_TLS | TLS_GD;
7100 goto dogot;
7101
7102 case R_PPC_GOT_TLSLD16:
7103 case R_PPC_GOT_TLSLD16_LO:
7104 case R_PPC_GOT_TLSLD16_HI:
7105 case R_PPC_GOT_TLSLD16_HA:
7106 tls_type = TLS_TLS | TLS_LD;
7107 goto dogot;
7108
7109 case R_PPC_GOT_TPREL16:
7110 case R_PPC_GOT_TPREL16_LO:
7111 case R_PPC_GOT_TPREL16_HI:
7112 case R_PPC_GOT_TPREL16_HA:
7113 tls_type = TLS_TLS | TLS_TPREL;
7114 goto dogot;
7115
7116 case R_PPC_GOT_DTPREL16:
7117 case R_PPC_GOT_DTPREL16_LO:
7118 case R_PPC_GOT_DTPREL16_HI:
7119 case R_PPC_GOT_DTPREL16_HA:
7120 tls_type = TLS_TLS | TLS_DTPREL;
7121 goto dogot;
7122
7123 case R_PPC_GOT16:
7124 case R_PPC_GOT16_LO:
7125 case R_PPC_GOT16_HI:
7126 case R_PPC_GOT16_HA:
7127 tls_mask = 0;
7128 dogot:
7129 {
7130 /* Relocation is to the entry for this symbol in the global
7131 offset table. */
7132 bfd_vma off;
7133 bfd_vma *offp;
7134 unsigned long indx;
7135
7136 if (htab->got == NULL)
7137 abort ();
7138
7139 indx = 0;
7140 if (tls_type == (TLS_TLS | TLS_LD)
7141 && (h == NULL
7142 || !h->def_dynamic))
7143 offp = &htab->tlsld_got.offset;
7144 else if (h != NULL)
7145 {
7146 bfd_boolean dyn;
7147 dyn = htab->elf.dynamic_sections_created;
7148 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7149 || (info->shared
7150 && SYMBOL_REFERENCES_LOCAL (info, h)))
7151 /* This is actually a static link, or it is a
7152 -Bsymbolic link and the symbol is defined
7153 locally, or the symbol was forced to be local
7154 because of a version file. */
7155 ;
7156 else
7157 {
7158 indx = h->dynindx;
7159 unresolved_reloc = FALSE;
7160 }
7161 offp = &h->got.offset;
7162 }
7163 else
7164 {
7165 if (local_got_offsets == NULL)
7166 abort ();
7167 offp = &local_got_offsets[r_symndx];
7168 }
7169
7170 /* The offset must always be a multiple of 4. We use the
7171 least significant bit to record whether we have already
7172 processed this entry. */
7173 off = *offp;
7174 if ((off & 1) != 0)
7175 off &= ~1;
7176 else
7177 {
7178 unsigned int tls_m = (tls_mask
7179 & (TLS_LD | TLS_GD | TLS_DTPREL
7180 | TLS_TPREL | TLS_TPRELGD));
7181
7182 if (offp == &htab->tlsld_got.offset)
7183 tls_m = TLS_LD;
7184 else if (h == NULL
7185 || !h->def_dynamic)
7186 tls_m &= ~TLS_LD;
7187
7188 /* We might have multiple got entries for this sym.
7189 Initialize them all. */
7190 do
7191 {
7192 int tls_ty = 0;
7193
7194 if ((tls_m & TLS_LD) != 0)
7195 {
7196 tls_ty = TLS_TLS | TLS_LD;
7197 tls_m &= ~TLS_LD;
7198 }
7199 else if ((tls_m & TLS_GD) != 0)
7200 {
7201 tls_ty = TLS_TLS | TLS_GD;
7202 tls_m &= ~TLS_GD;
7203 }
7204 else if ((tls_m & TLS_DTPREL) != 0)
7205 {
7206 tls_ty = TLS_TLS | TLS_DTPREL;
7207 tls_m &= ~TLS_DTPREL;
7208 }
7209 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7210 {
7211 tls_ty = TLS_TLS | TLS_TPREL;
7212 tls_m = 0;
7213 }
7214
7215 /* Generate relocs for the dynamic linker. */
7216 if ((info->shared || indx != 0)
7217 && (offp == &htab->tlsld_got.offset
7218 || h == NULL
7219 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7220 || h->root.type != bfd_link_hash_undefweak))
7221 {
7222 asection *rsec = htab->relgot;
7223
7224 outrel.r_offset = (htab->got->output_section->vma
7225 + htab->got->output_offset
7226 + off);
7227 outrel.r_addend = 0;
7228 if (tls_ty & (TLS_LD | TLS_GD))
7229 {
7230 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7231 if (tls_ty == (TLS_TLS | TLS_GD))
7232 {
7233 loc = rsec->contents;
7234 loc += (rsec->reloc_count++
7235 * sizeof (Elf32_External_Rela));
7236 bfd_elf32_swap_reloca_out (output_bfd,
7237 &outrel, loc);
7238 outrel.r_offset += 4;
7239 outrel.r_info
7240 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7241 }
7242 }
7243 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7244 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7245 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7246 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7247 else if (indx != 0)
7248 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7249 else if (ifunc != NULL)
7250 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7251 else
7252 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7253 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7254 {
7255 outrel.r_addend += relocation;
7256 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7257 outrel.r_addend -= htab->elf.tls_sec->vma;
7258 }
7259 loc = rsec->contents;
7260 loc += (rsec->reloc_count++
7261 * sizeof (Elf32_External_Rela));
7262 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7263 }
7264
7265 /* Init the .got section contents if we're not
7266 emitting a reloc. */
7267 else
7268 {
7269 bfd_vma value = relocation;
7270
7271 if (tls_ty == (TLS_TLS | TLS_LD))
7272 value = 1;
7273 else if (tls_ty != 0)
7274 {
7275 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7276 if (tls_ty == (TLS_TLS | TLS_TPREL))
7277 value += DTP_OFFSET - TP_OFFSET;
7278
7279 if (tls_ty == (TLS_TLS | TLS_GD))
7280 {
7281 bfd_put_32 (output_bfd, value,
7282 htab->got->contents + off + 4);
7283 value = 1;
7284 }
7285 }
7286 bfd_put_32 (output_bfd, value,
7287 htab->got->contents + off);
7288 }
7289
7290 off += 4;
7291 if (tls_ty & (TLS_LD | TLS_GD))
7292 off += 4;
7293 }
7294 while (tls_m != 0);
7295
7296 off = *offp;
7297 *offp = off | 1;
7298 }
7299
7300 if (off >= (bfd_vma) -2)
7301 abort ();
7302
7303 if ((tls_type & TLS_TLS) != 0)
7304 {
7305 if (tls_type != (TLS_TLS | TLS_LD))
7306 {
7307 if ((tls_mask & TLS_LD) != 0
7308 && !(h == NULL
7309 || !h->def_dynamic))
7310 off += 8;
7311 if (tls_type != (TLS_TLS | TLS_GD))
7312 {
7313 if ((tls_mask & TLS_GD) != 0)
7314 off += 8;
7315 if (tls_type != (TLS_TLS | TLS_DTPREL))
7316 {
7317 if ((tls_mask & TLS_DTPREL) != 0)
7318 off += 4;
7319 }
7320 }
7321 }
7322 }
7323
7324 relocation = (htab->got->output_section->vma
7325 + htab->got->output_offset
7326 + off
7327 - SYM_VAL (htab->elf.hgot));
7328
7329 /* Addends on got relocations don't make much sense.
7330 x+off@got is actually x@got+off, and since the got is
7331 generated by a hash table traversal, the value in the
7332 got at entry m+n bears little relation to the entry m. */
7333 if (addend != 0)
7334 (*_bfd_error_handler)
7335 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7336 input_bfd,
7337 input_section,
7338 (long) rel->r_offset,
7339 howto->name,
7340 sym_name);
7341 }
7342 break;
7343
7344 /* Relocations that need no special processing. */
7345 case R_PPC_LOCAL24PC:
7346 /* It makes no sense to point a local relocation
7347 at a symbol not in this object. */
7348 if (unresolved_reloc)
7349 {
7350 if (! (*info->callbacks->undefined_symbol) (info,
7351 h->root.root.string,
7352 input_bfd,
7353 input_section,
7354 rel->r_offset,
7355 TRUE))
7356 return FALSE;
7357 continue;
7358 }
7359 break;
7360
7361 case R_PPC_DTPREL16:
7362 case R_PPC_DTPREL16_LO:
7363 case R_PPC_DTPREL16_HI:
7364 case R_PPC_DTPREL16_HA:
7365 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7366 break;
7367
7368 /* Relocations that may need to be propagated if this is a shared
7369 object. */
7370 case R_PPC_TPREL16:
7371 case R_PPC_TPREL16_LO:
7372 case R_PPC_TPREL16_HI:
7373 case R_PPC_TPREL16_HA:
7374 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7375 /* The TPREL16 relocs shouldn't really be used in shared
7376 libs as they will result in DT_TEXTREL being set, but
7377 support them anyway. */
7378 goto dodyn;
7379
7380 case R_PPC_TPREL32:
7381 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7382 goto dodyn;
7383
7384 case R_PPC_DTPREL32:
7385 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7386 goto dodyn;
7387
7388 case R_PPC_DTPMOD32:
7389 relocation = 1;
7390 addend = 0;
7391 goto dodyn;
7392
7393 case R_PPC_REL16:
7394 case R_PPC_REL16_LO:
7395 case R_PPC_REL16_HI:
7396 case R_PPC_REL16_HA:
7397 break;
7398
7399 case R_PPC_REL32:
7400 if (h == NULL || h == htab->elf.hgot)
7401 break;
7402 /* fall through */
7403
7404 case R_PPC_ADDR32:
7405 case R_PPC_ADDR16:
7406 case R_PPC_ADDR16_LO:
7407 case R_PPC_ADDR16_HI:
7408 case R_PPC_ADDR16_HA:
7409 case R_PPC_UADDR32:
7410 case R_PPC_UADDR16:
7411 goto dodyn;
7412
7413 case R_PPC_REL24:
7414 case R_PPC_REL14:
7415 case R_PPC_REL14_BRTAKEN:
7416 case R_PPC_REL14_BRNTAKEN:
7417 /* If these relocations are not to a named symbol, they can be
7418 handled right here, no need to bother the dynamic linker. */
7419 if (SYMBOL_CALLS_LOCAL (info, h)
7420 || h == htab->elf.hgot)
7421 break;
7422 /* fall through */
7423
7424 case R_PPC_ADDR24:
7425 case R_PPC_ADDR14:
7426 case R_PPC_ADDR14_BRTAKEN:
7427 case R_PPC_ADDR14_BRNTAKEN:
7428 if (h != NULL && !info->shared)
7429 break;
7430 /* fall through */
7431
7432 dodyn:
7433 if ((input_section->flags & SEC_ALLOC) == 0
7434 || is_vxworks_tls)
7435 break;
7436
7437 if ((info->shared
7438 && !(h != NULL
7439 && ((h->root.type == bfd_link_hash_undefined
7440 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7441 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7442 || (h->root.type == bfd_link_hash_undefweak
7443 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7444 && (must_be_dyn_reloc (info, r_type)
7445 || !SYMBOL_CALLS_LOCAL (info, h)))
7446 || (ELIMINATE_COPY_RELOCS
7447 && !info->shared
7448 && h != NULL
7449 && h->dynindx != -1
7450 && !h->non_got_ref
7451 && !h->def_regular))
7452 {
7453 int skip;
7454
7455 #ifdef DEBUG
7456 fprintf (stderr, "ppc_elf_relocate_section needs to "
7457 "create relocation for %s\n",
7458 (h && h->root.root.string
7459 ? h->root.root.string : "<unknown>"));
7460 #endif
7461
7462 /* When generating a shared object, these relocations
7463 are copied into the output file to be resolved at run
7464 time. */
7465 if (sreloc == NULL)
7466 {
7467 sreloc = elf_section_data (input_section)->sreloc;
7468 if (!htab->elf.dynamic_sections_created)
7469 sreloc = htab->reliplt;
7470 if (sreloc == NULL)
7471 return FALSE;
7472 }
7473
7474 skip = 0;
7475 outrel.r_offset =
7476 _bfd_elf_section_offset (output_bfd, info, input_section,
7477 rel->r_offset);
7478 if (outrel.r_offset == (bfd_vma) -1
7479 || outrel.r_offset == (bfd_vma) -2)
7480 skip = (int) outrel.r_offset;
7481 outrel.r_offset += (input_section->output_section->vma
7482 + input_section->output_offset);
7483
7484 if (skip)
7485 memset (&outrel, 0, sizeof outrel);
7486 else if ((h != NULL
7487 && (h->root.type == bfd_link_hash_undefined
7488 || h->root.type == bfd_link_hash_undefweak))
7489 || !SYMBOL_REFERENCES_LOCAL (info, h))
7490 {
7491 unresolved_reloc = FALSE;
7492 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7493 outrel.r_addend = rel->r_addend;
7494 }
7495 else
7496 {
7497 outrel.r_addend = relocation + rel->r_addend;
7498
7499 if (r_type != R_PPC_ADDR32)
7500 {
7501 long indx = 0;
7502
7503 if (ifunc != NULL)
7504 {
7505 /* If we get here when building a static
7506 executable, then the libc startup function
7507 responsible for applying indirect function
7508 relocations is going to complain about
7509 the reloc type.
7510 If we get here when building a dynamic
7511 executable, it will be because we have
7512 a text relocation. The dynamic loader
7513 will set the text segment writable and
7514 non-executable to apply text relocations.
7515 So we'll segfault when trying to run the
7516 indirection function to resolve the reloc. */
7517 (*_bfd_error_handler)
7518 (_("%B(%A+0x%lx): relocation %s for indirect "
7519 "function %s unsupported"),
7520 input_bfd,
7521 input_section,
7522 (long) rel->r_offset,
7523 howto->name,
7524 sym_name);
7525 ret = FALSE;
7526 }
7527 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7528 ;
7529 else if (sec == NULL || sec->owner == NULL)
7530 {
7531 bfd_set_error (bfd_error_bad_value);
7532 ret = FALSE;
7533 }
7534 else
7535 {
7536 asection *osec;
7537
7538 /* We are turning this relocation into one
7539 against a section symbol. It would be
7540 proper to subtract the symbol's value,
7541 osec->vma, from the emitted reloc addend,
7542 but ld.so expects buggy relocs.
7543 FIXME: Why not always use a zero index? */
7544 osec = sec->output_section;
7545 indx = elf_section_data (osec)->dynindx;
7546 if (indx == 0)
7547 {
7548 osec = htab->elf.text_index_section;
7549 indx = elf_section_data (osec)->dynindx;
7550 }
7551 BFD_ASSERT (indx != 0);
7552 #ifdef DEBUG
7553 if (indx == 0)
7554 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7555 indx, osec->name, osec->flags,
7556 h->root.root.string);
7557 #endif
7558 }
7559
7560 outrel.r_info = ELF32_R_INFO (indx, r_type);
7561 }
7562 else if (ifunc != NULL)
7563 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7564 else
7565 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7566 }
7567
7568 loc = sreloc->contents;
7569 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7570 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7571
7572 if (skip == -1)
7573 continue;
7574
7575 /* This reloc will be computed at runtime. We clear the memory
7576 so that it contains predictable value. */
7577 if (! skip
7578 && ((input_section->flags & SEC_ALLOC) != 0
7579 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7580 {
7581 relocation = howto->pc_relative ? outrel.r_offset : 0;
7582 addend = 0;
7583 break;
7584 }
7585 }
7586 break;
7587
7588 case R_PPC_RELAX32PC_PLT:
7589 case R_PPC_RELAX32_PLT:
7590 if (h != NULL)
7591 {
7592 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7593 info->shared ? addend : 0);
7594 if (htab->plt_type == PLT_NEW)
7595 relocation = (htab->glink->output_section->vma
7596 + htab->glink->output_offset
7597 + ent->glink_offset);
7598 else
7599 relocation = (htab->plt->output_section->vma
7600 + htab->plt->output_offset
7601 + ent->plt.offset);
7602 }
7603 if (r_type == R_PPC_RELAX32_PLT)
7604 goto relax32;
7605 /* Fall thru */
7606
7607 case R_PPC_RELAX32PC:
7608 relocation -= (input_section->output_section->vma
7609 + input_section->output_offset
7610 + rel->r_offset - 4);
7611 /* Fall thru */
7612
7613 case R_PPC_RELAX32:
7614 relax32:
7615 {
7616 unsigned long t0;
7617 unsigned long t1;
7618
7619 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7620 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7621
7622 /* We're clearing the bits for R_PPC_ADDR16_HA
7623 and R_PPC_ADDR16_LO here. */
7624 t0 &= ~0xffff;
7625 t1 &= ~0xffff;
7626
7627 /* t0 is HA, t1 is LO */
7628 relocation += addend;
7629 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7630 t1 |= relocation & 0xffff;
7631
7632 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7633 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7634
7635 /* Rewrite the reloc and convert one of the trailing nop
7636 relocs to describe this relocation. */
7637 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7638 /* The relocs are at the bottom 2 bytes */
7639 rel[0].r_offset += 2;
7640 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7641 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7642 rel[1].r_offset += 4;
7643 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7644 rel++;
7645 }
7646 continue;
7647
7648 /* Indirect .sdata relocation. */
7649 case R_PPC_EMB_SDAI16:
7650 BFD_ASSERT (htab->sdata[0].section != NULL);
7651 if (!is_static_defined (htab->sdata[0].sym))
7652 {
7653 unresolved_reloc = TRUE;
7654 break;
7655 }
7656 relocation
7657 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7658 h, relocation, rel);
7659 addend = 0;
7660 break;
7661
7662 /* Indirect .sdata2 relocation. */
7663 case R_PPC_EMB_SDA2I16:
7664 BFD_ASSERT (htab->sdata[1].section != NULL);
7665 if (!is_static_defined (htab->sdata[1].sym))
7666 {
7667 unresolved_reloc = TRUE;
7668 break;
7669 }
7670 relocation
7671 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7672 h, relocation, rel);
7673 addend = 0;
7674 break;
7675
7676 /* Handle the TOC16 reloc. We want to use the offset within the .got
7677 section, not the actual VMA. This is appropriate when generating
7678 an embedded ELF object, for which the .got section acts like the
7679 AIX .toc section. */
7680 case R_PPC_TOC16: /* phony GOT16 relocations */
7681 if (sec == NULL || sec->output_section == NULL)
7682 {
7683 unresolved_reloc = TRUE;
7684 break;
7685 }
7686 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7687 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7688
7689 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7690 break;
7691
7692 case R_PPC_PLTREL24:
7693 if (h == NULL || ifunc != NULL)
7694 break;
7695 /* Relocation is to the entry for this symbol in the
7696 procedure linkage table. */
7697 {
7698 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7699 info->shared ? addend : 0);
7700 addend = 0;
7701 if (ent == NULL
7702 || htab->plt == NULL)
7703 {
7704 /* We didn't make a PLT entry for this symbol. This
7705 happens when statically linking PIC code, or when
7706 using -Bsymbolic. */
7707 break;
7708 }
7709
7710 unresolved_reloc = FALSE;
7711 if (htab->plt_type == PLT_NEW)
7712 relocation = (htab->glink->output_section->vma
7713 + htab->glink->output_offset
7714 + ent->glink_offset);
7715 else
7716 relocation = (htab->plt->output_section->vma
7717 + htab->plt->output_offset
7718 + ent->plt.offset);
7719 }
7720 break;
7721
7722 /* Relocate against _SDA_BASE_. */
7723 case R_PPC_SDAREL16:
7724 {
7725 const char *name;
7726 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7727
7728 if (sec == NULL
7729 || sec->output_section == NULL
7730 || !is_static_defined (sda))
7731 {
7732 unresolved_reloc = TRUE;
7733 break;
7734 }
7735 addend -= SYM_VAL (sda);
7736
7737 name = bfd_get_section_name (abfd, sec->output_section);
7738 if (! ((CONST_STRNEQ (name, ".sdata")
7739 && (name[6] == 0 || name[6] == '.'))
7740 || (CONST_STRNEQ (name, ".sbss")
7741 && (name[5] == 0 || name[5] == '.'))))
7742 {
7743 (*_bfd_error_handler)
7744 (_("%B: the target (%s) of a %s relocation is "
7745 "in the wrong output section (%s)"),
7746 input_bfd,
7747 sym_name,
7748 howto->name,
7749 name);
7750 }
7751 }
7752 break;
7753
7754 /* Relocate against _SDA2_BASE_. */
7755 case R_PPC_EMB_SDA2REL:
7756 {
7757 const char *name;
7758 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7759
7760 if (sec == NULL
7761 || sec->output_section == NULL
7762 || !is_static_defined (sda))
7763 {
7764 unresolved_reloc = TRUE;
7765 break;
7766 }
7767 addend -= SYM_VAL (sda);
7768
7769 name = bfd_get_section_name (abfd, sec->output_section);
7770 if (! (CONST_STRNEQ (name, ".sdata2")
7771 || CONST_STRNEQ (name, ".sbss2")))
7772 {
7773 (*_bfd_error_handler)
7774 (_("%B: the target (%s) of a %s relocation is "
7775 "in the wrong output section (%s)"),
7776 input_bfd,
7777 sym_name,
7778 howto->name,
7779 name);
7780 }
7781 }
7782 break;
7783
7784 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7785 case R_PPC_EMB_SDA21:
7786 case R_PPC_EMB_RELSDA:
7787 {
7788 const char *name;
7789 int reg;
7790 struct elf_link_hash_entry *sda = NULL;
7791
7792 if (sec == NULL || sec->output_section == NULL)
7793 {
7794 unresolved_reloc = TRUE;
7795 break;
7796 }
7797
7798 name = bfd_get_section_name (abfd, sec->output_section);
7799 if (((CONST_STRNEQ (name, ".sdata")
7800 && (name[6] == 0 || name[6] == '.'))
7801 || (CONST_STRNEQ (name, ".sbss")
7802 && (name[5] == 0 || name[5] == '.'))))
7803 {
7804 reg = 13;
7805 sda = htab->sdata[0].sym;
7806 }
7807 else if (CONST_STRNEQ (name, ".sdata2")
7808 || CONST_STRNEQ (name, ".sbss2"))
7809 {
7810 reg = 2;
7811 sda = htab->sdata[1].sym;
7812 }
7813 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7814 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7815 {
7816 reg = 0;
7817 }
7818 else
7819 {
7820 (*_bfd_error_handler)
7821 (_("%B: the target (%s) of a %s relocation is "
7822 "in the wrong output section (%s)"),
7823 input_bfd,
7824 sym_name,
7825 howto->name,
7826 name);
7827
7828 bfd_set_error (bfd_error_bad_value);
7829 ret = FALSE;
7830 continue;
7831 }
7832
7833 if (sda != NULL)
7834 {
7835 if (!is_static_defined (sda))
7836 {
7837 unresolved_reloc = TRUE;
7838 break;
7839 }
7840 addend -= SYM_VAL (sda);
7841 }
7842
7843 if (r_type == R_PPC_EMB_SDA21)
7844 { /* fill in register field */
7845 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7846 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7847 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7848 }
7849 }
7850 break;
7851
7852 /* Relocate against the beginning of the section. */
7853 case R_PPC_SECTOFF:
7854 case R_PPC_SECTOFF_LO:
7855 case R_PPC_SECTOFF_HI:
7856 case R_PPC_SECTOFF_HA:
7857 if (sec == NULL || sec->output_section == NULL)
7858 {
7859 unresolved_reloc = TRUE;
7860 break;
7861 }
7862 addend -= sec->output_section->vma;
7863 break;
7864
7865 /* Negative relocations. */
7866 case R_PPC_EMB_NADDR32:
7867 case R_PPC_EMB_NADDR16:
7868 case R_PPC_EMB_NADDR16_LO:
7869 case R_PPC_EMB_NADDR16_HI:
7870 case R_PPC_EMB_NADDR16_HA:
7871 addend -= 2 * relocation;
7872 break;
7873
7874 case R_PPC_COPY:
7875 case R_PPC_GLOB_DAT:
7876 case R_PPC_JMP_SLOT:
7877 case R_PPC_RELATIVE:
7878 case R_PPC_IRELATIVE:
7879 case R_PPC_PLT32:
7880 case R_PPC_PLTREL32:
7881 case R_PPC_PLT16_LO:
7882 case R_PPC_PLT16_HI:
7883 case R_PPC_PLT16_HA:
7884 case R_PPC_ADDR30:
7885 case R_PPC_EMB_RELSEC16:
7886 case R_PPC_EMB_RELST_LO:
7887 case R_PPC_EMB_RELST_HI:
7888 case R_PPC_EMB_RELST_HA:
7889 case R_PPC_EMB_BIT_FLD:
7890 (*_bfd_error_handler)
7891 (_("%B: relocation %s is not yet supported for symbol %s."),
7892 input_bfd,
7893 howto->name,
7894 sym_name);
7895
7896 bfd_set_error (bfd_error_invalid_operation);
7897 ret = FALSE;
7898 continue;
7899 }
7900
7901 /* Do any further special processing. */
7902 switch (r_type)
7903 {
7904 default:
7905 break;
7906
7907 case R_PPC_ADDR16_HA:
7908 case R_PPC_REL16_HA:
7909 case R_PPC_SECTOFF_HA:
7910 case R_PPC_TPREL16_HA:
7911 case R_PPC_DTPREL16_HA:
7912 case R_PPC_EMB_NADDR16_HA:
7913 case R_PPC_EMB_RELST_HA:
7914 /* It's just possible that this symbol is a weak symbol
7915 that's not actually defined anywhere. In that case,
7916 'sec' would be NULL, and we should leave the symbol
7917 alone (it will be set to zero elsewhere in the link). */
7918 if (sec == NULL)
7919 break;
7920 /* Fall thru */
7921
7922 case R_PPC_PLT16_HA:
7923 case R_PPC_GOT16_HA:
7924 case R_PPC_GOT_TLSGD16_HA:
7925 case R_PPC_GOT_TLSLD16_HA:
7926 case R_PPC_GOT_TPREL16_HA:
7927 case R_PPC_GOT_DTPREL16_HA:
7928 /* Add 0x10000 if sign bit in 0:15 is set.
7929 Bits 0:15 are not used. */
7930 addend += 0x8000;
7931 break;
7932 }
7933
7934 #ifdef DEBUG
7935 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7936 "offset = %ld, addend = %ld\n",
7937 howto->name,
7938 (int) r_type,
7939 sym_name,
7940 r_symndx,
7941 (long) rel->r_offset,
7942 (long) addend);
7943 #endif
7944
7945 if (unresolved_reloc
7946 && !((input_section->flags & SEC_DEBUGGING) != 0
7947 && h->def_dynamic))
7948 {
7949 (*_bfd_error_handler)
7950 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7951 input_bfd,
7952 input_section,
7953 (long) rel->r_offset,
7954 howto->name,
7955 sym_name);
7956 ret = FALSE;
7957 }
7958
7959 r = _bfd_final_link_relocate (howto,
7960 input_bfd,
7961 input_section,
7962 contents,
7963 rel->r_offset,
7964 relocation,
7965 addend);
7966
7967 if (r != bfd_reloc_ok)
7968 {
7969 if (r == bfd_reloc_overflow)
7970 {
7971 if (warned)
7972 continue;
7973 if (h != NULL
7974 && h->root.type == bfd_link_hash_undefweak
7975 && howto->pc_relative)
7976 {
7977 /* Assume this is a call protected by other code that
7978 detect the symbol is undefined. If this is the case,
7979 we can safely ignore the overflow. If not, the
7980 program is hosed anyway, and a little warning isn't
7981 going to help. */
7982
7983 continue;
7984 }
7985
7986 if (! (*info->callbacks->reloc_overflow) (info,
7987 (h ? &h->root : NULL),
7988 sym_name,
7989 howto->name,
7990 rel->r_addend,
7991 input_bfd,
7992 input_section,
7993 rel->r_offset))
7994 return FALSE;
7995 }
7996 else
7997 {
7998 (*_bfd_error_handler)
7999 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8000 input_bfd, input_section,
8001 (long) rel->r_offset, howto->name, sym_name, (int) r);
8002 ret = FALSE;
8003 }
8004 }
8005 }
8006
8007 #ifdef DEBUG
8008 fprintf (stderr, "\n");
8009 #endif
8010
8011 return ret;
8012 }
8013 \f
8014 /* Finish up dynamic symbol handling. We set the contents of various
8015 dynamic sections here. */
8016
8017 static bfd_boolean
8018 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8019 struct bfd_link_info *info,
8020 struct elf_link_hash_entry *h,
8021 Elf_Internal_Sym *sym)
8022 {
8023 struct ppc_elf_link_hash_table *htab;
8024 struct plt_entry *ent;
8025 bfd_boolean doneone;
8026
8027 #ifdef DEBUG
8028 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8029 h->root.root.string);
8030 #endif
8031
8032 htab = ppc_elf_hash_table (info);
8033 BFD_ASSERT (htab->elf.dynobj != NULL);
8034
8035 doneone = FALSE;
8036 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8037 if (ent->plt.offset != (bfd_vma) -1)
8038 {
8039 if (!doneone)
8040 {
8041 Elf_Internal_Rela rela;
8042 bfd_byte *loc;
8043 bfd_vma reloc_index;
8044
8045 if (htab->plt_type == PLT_NEW
8046 || !htab->elf.dynamic_sections_created
8047 || h->dynindx == -1)
8048 reloc_index = ent->plt.offset / 4;
8049 else
8050 {
8051 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8052 / htab->plt_slot_size);
8053 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8054 && htab->plt_type == PLT_OLD)
8055 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8056 }
8057
8058 /* This symbol has an entry in the procedure linkage table.
8059 Set it up. */
8060 if (htab->plt_type == PLT_VXWORKS
8061 && htab->elf.dynamic_sections_created
8062 && h->dynindx != -1)
8063 {
8064 bfd_vma got_offset;
8065 const bfd_vma *plt_entry;
8066
8067 /* The first three entries in .got.plt are reserved. */
8068 got_offset = (reloc_index + 3) * 4;
8069
8070 /* Use the right PLT. */
8071 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8072 : ppc_elf_vxworks_plt_entry;
8073
8074 /* Fill in the .plt on VxWorks. */
8075 if (info->shared)
8076 {
8077 bfd_put_32 (output_bfd,
8078 plt_entry[0] | PPC_HA (got_offset),
8079 htab->plt->contents + ent->plt.offset + 0);
8080 bfd_put_32 (output_bfd,
8081 plt_entry[1] | PPC_LO (got_offset),
8082 htab->plt->contents + ent->plt.offset + 4);
8083 }
8084 else
8085 {
8086 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8087
8088 bfd_put_32 (output_bfd,
8089 plt_entry[0] | PPC_HA (got_loc),
8090 htab->plt->contents + ent->plt.offset + 0);
8091 bfd_put_32 (output_bfd,
8092 plt_entry[1] | PPC_LO (got_loc),
8093 htab->plt->contents + ent->plt.offset + 4);
8094 }
8095
8096 bfd_put_32 (output_bfd, plt_entry[2],
8097 htab->plt->contents + ent->plt.offset + 8);
8098 bfd_put_32 (output_bfd, plt_entry[3],
8099 htab->plt->contents + ent->plt.offset + 12);
8100
8101 /* This instruction is an immediate load. The value loaded is
8102 the byte offset of the R_PPC_JMP_SLOT relocation from the
8103 start of the .rela.plt section. The value is stored in the
8104 low-order 16 bits of the load instruction. */
8105 /* NOTE: It appears that this is now an index rather than a
8106 prescaled offset. */
8107 bfd_put_32 (output_bfd,
8108 plt_entry[4] | reloc_index,
8109 htab->plt->contents + ent->plt.offset + 16);
8110 /* This instruction is a PC-relative branch whose target is
8111 the start of the PLT section. The address of this branch
8112 instruction is 20 bytes beyond the start of this PLT entry.
8113 The address is encoded in bits 6-29, inclusive. The value
8114 stored is right-shifted by two bits, permitting a 26-bit
8115 offset. */
8116 bfd_put_32 (output_bfd,
8117 (plt_entry[5]
8118 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8119 htab->plt->contents + ent->plt.offset + 20);
8120 bfd_put_32 (output_bfd, plt_entry[6],
8121 htab->plt->contents + ent->plt.offset + 24);
8122 bfd_put_32 (output_bfd, plt_entry[7],
8123 htab->plt->contents + ent->plt.offset + 28);
8124
8125 /* Fill in the GOT entry corresponding to this PLT slot with
8126 the address immediately after the the "bctr" instruction
8127 in this PLT entry. */
8128 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8129 + htab->plt->output_offset
8130 + ent->plt.offset + 16),
8131 htab->sgotplt->contents + got_offset);
8132
8133 if (!info->shared)
8134 {
8135 /* Fill in a couple of entries in .rela.plt.unloaded. */
8136 loc = htab->srelplt2->contents
8137 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8138 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8139 * sizeof (Elf32_External_Rela));
8140
8141 /* Provide the @ha relocation for the first instruction. */
8142 rela.r_offset = (htab->plt->output_section->vma
8143 + htab->plt->output_offset
8144 + ent->plt.offset + 2);
8145 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8146 R_PPC_ADDR16_HA);
8147 rela.r_addend = got_offset;
8148 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8149 loc += sizeof (Elf32_External_Rela);
8150
8151 /* Provide the @l relocation for the second instruction. */
8152 rela.r_offset = (htab->plt->output_section->vma
8153 + htab->plt->output_offset
8154 + ent->plt.offset + 6);
8155 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8156 R_PPC_ADDR16_LO);
8157 rela.r_addend = got_offset;
8158 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8159 loc += sizeof (Elf32_External_Rela);
8160
8161 /* Provide a relocation for the GOT entry corresponding to this
8162 PLT slot. Point it at the middle of the .plt entry. */
8163 rela.r_offset = (htab->sgotplt->output_section->vma
8164 + htab->sgotplt->output_offset
8165 + got_offset);
8166 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8167 R_PPC_ADDR32);
8168 rela.r_addend = ent->plt.offset + 16;
8169 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8170 }
8171
8172 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8173 In particular, the offset for the relocation is not the
8174 address of the PLT entry for this function, as specified
8175 by the ABI. Instead, the offset is set to the address of
8176 the GOT slot for this function. See EABI 4.4.4.1. */
8177 rela.r_offset = (htab->sgotplt->output_section->vma
8178 + htab->sgotplt->output_offset
8179 + got_offset);
8180
8181 }
8182 else
8183 {
8184 asection *splt = htab->plt;
8185 if (!htab->elf.dynamic_sections_created
8186 || h->dynindx == -1)
8187 splt = htab->iplt;
8188
8189 rela.r_offset = (splt->output_section->vma
8190 + splt->output_offset
8191 + ent->plt.offset);
8192 if (htab->plt_type == PLT_OLD
8193 || !htab->elf.dynamic_sections_created
8194 || h->dynindx == -1)
8195 {
8196 /* We don't need to fill in the .plt. The ppc dynamic
8197 linker will fill it in. */
8198 }
8199 else
8200 {
8201 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8202 + htab->glink->output_section->vma
8203 + htab->glink->output_offset);
8204 bfd_put_32 (output_bfd, val,
8205 splt->contents + ent->plt.offset);
8206 }
8207 }
8208
8209 /* Fill in the entry in the .rela.plt section. */
8210 rela.r_addend = 0;
8211 if (!htab->elf.dynamic_sections_created
8212 || h->dynindx == -1)
8213 {
8214 BFD_ASSERT (h->type == STT_GNU_IFUNC
8215 && h->def_regular
8216 && (h->root.type == bfd_link_hash_defined
8217 || h->root.type == bfd_link_hash_defweak));
8218 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8219 rela.r_addend = SYM_VAL (h);
8220 }
8221 else
8222 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8223
8224 if (!htab->elf.dynamic_sections_created
8225 || h->dynindx == -1)
8226 loc = (htab->reliplt->contents
8227 + (htab->reliplt->reloc_count++
8228 * sizeof (Elf32_External_Rela)));
8229 else
8230 loc = (htab->relplt->contents
8231 + reloc_index * sizeof (Elf32_External_Rela));
8232 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8233
8234 if (!h->def_regular)
8235 {
8236 /* Mark the symbol as undefined, rather than as
8237 defined in the .plt section. Leave the value if
8238 there were any relocations where pointer equality
8239 matters (this is a clue for the dynamic linker, to
8240 make function pointer comparisons work between an
8241 application and shared library), otherwise set it
8242 to zero. */
8243 sym->st_shndx = SHN_UNDEF;
8244 if (!h->pointer_equality_needed)
8245 sym->st_value = 0;
8246 else if (!h->ref_regular_nonweak)
8247 {
8248 /* This breaks function pointer comparisons, but
8249 that is better than breaking tests for a NULL
8250 function pointer. */
8251 sym->st_value = 0;
8252 }
8253 }
8254 else if (h->type == STT_GNU_IFUNC
8255 && !info->shared)
8256 {
8257 /* Set the value of ifunc symbols in a non-pie
8258 executable to the glink entry. This is to avoid
8259 text relocations. We can't do this for ifunc in
8260 allocate_dynrelocs, as we do for normal dynamic
8261 function symbols with plt entries, because we need
8262 to keep the original value around for the ifunc
8263 relocation. */
8264 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8265 (output_bfd, htab->glink->output_section));
8266 sym->st_value = (ent->glink_offset +
8267 htab->glink->output_offset
8268 + htab->glink->output_section->vma);
8269 }
8270 doneone = TRUE;
8271 }
8272
8273 if (htab->plt_type == PLT_NEW
8274 || !htab->elf.dynamic_sections_created
8275 || h->dynindx == -1)
8276 {
8277 asection *splt = htab->plt;
8278 if (!htab->elf.dynamic_sections_created
8279 || h->dynindx == -1)
8280 splt = htab->iplt;
8281
8282 write_glink_stub (ent, splt, info);
8283
8284 if (!info->shared)
8285 /* We only need one non-PIC glink stub. */
8286 break;
8287 }
8288 else
8289 break;
8290 }
8291
8292 if (h->needs_copy)
8293 {
8294 asection *s;
8295 Elf_Internal_Rela rela;
8296 bfd_byte *loc;
8297
8298 /* This symbols needs a copy reloc. Set it up. */
8299
8300 #ifdef DEBUG
8301 fprintf (stderr, ", copy");
8302 #endif
8303
8304 BFD_ASSERT (h->dynindx != -1);
8305
8306 if (ppc_elf_hash_entry (h)->has_sda_refs)
8307 s = htab->relsbss;
8308 else
8309 s = htab->relbss;
8310 BFD_ASSERT (s != NULL);
8311
8312 rela.r_offset = SYM_VAL (h);
8313 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8314 rela.r_addend = 0;
8315 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8316 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8317 }
8318
8319 #ifdef DEBUG
8320 fprintf (stderr, "\n");
8321 #endif
8322
8323 /* Mark some specially defined symbols as absolute. */
8324 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8325 || (!htab->is_vxworks
8326 && (h == htab->elf.hgot
8327 || strcmp (h->root.root.string,
8328 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8329 sym->st_shndx = SHN_ABS;
8330
8331 return TRUE;
8332 }
8333 \f
8334 static enum elf_reloc_type_class
8335 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8336 {
8337 switch (ELF32_R_TYPE (rela->r_info))
8338 {
8339 case R_PPC_RELATIVE:
8340 return reloc_class_relative;
8341 case R_PPC_REL24:
8342 case R_PPC_ADDR24:
8343 case R_PPC_JMP_SLOT:
8344 return reloc_class_plt;
8345 case R_PPC_COPY:
8346 return reloc_class_copy;
8347 default:
8348 return reloc_class_normal;
8349 }
8350 }
8351 \f
8352 /* Finish up the dynamic sections. */
8353
8354 static bfd_boolean
8355 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8356 struct bfd_link_info *info)
8357 {
8358 asection *sdyn;
8359 asection *splt;
8360 struct ppc_elf_link_hash_table *htab;
8361 bfd_vma got;
8362 bfd *dynobj;
8363 bfd_boolean ret = TRUE;
8364
8365 #ifdef DEBUG
8366 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8367 #endif
8368
8369 htab = ppc_elf_hash_table (info);
8370 dynobj = elf_hash_table (info)->dynobj;
8371 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8372 if (htab->is_vxworks)
8373 splt = bfd_get_section_by_name (dynobj, ".plt");
8374 else
8375 splt = NULL;
8376
8377 got = 0;
8378 if (htab->elf.hgot != NULL)
8379 got = SYM_VAL (htab->elf.hgot);
8380
8381 if (htab->elf.dynamic_sections_created)
8382 {
8383 Elf32_External_Dyn *dyncon, *dynconend;
8384
8385 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8386
8387 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8388 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8389 for (; dyncon < dynconend; dyncon++)
8390 {
8391 Elf_Internal_Dyn dyn;
8392 asection *s;
8393
8394 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8395
8396 switch (dyn.d_tag)
8397 {
8398 case DT_PLTGOT:
8399 if (htab->is_vxworks)
8400 s = htab->sgotplt;
8401 else
8402 s = htab->plt;
8403 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8404 break;
8405
8406 case DT_PLTRELSZ:
8407 dyn.d_un.d_val = htab->relplt->size;
8408 break;
8409
8410 case DT_JMPREL:
8411 s = htab->relplt;
8412 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8413 break;
8414
8415 case DT_PPC_GOT:
8416 dyn.d_un.d_ptr = got;
8417 break;
8418
8419 case DT_RELASZ:
8420 if (htab->is_vxworks)
8421 {
8422 if (htab->relplt)
8423 dyn.d_un.d_ptr -= htab->relplt->size;
8424 break;
8425 }
8426 continue;
8427
8428 default:
8429 if (htab->is_vxworks
8430 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8431 break;
8432 continue;
8433 }
8434
8435 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8436 }
8437 }
8438
8439 if (htab->got != NULL)
8440 {
8441 if (htab->elf.hgot->root.u.def.section == htab->got
8442 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8443 {
8444 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8445
8446 p += htab->elf.hgot->root.u.def.value;
8447 if (htab->plt_type == PLT_OLD)
8448 {
8449 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8450 so that a function can easily find the address of
8451 _GLOBAL_OFFSET_TABLE_. */
8452 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8453 < htab->elf.hgot->root.u.def.section->size);
8454 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8455 }
8456
8457 if (sdyn != NULL)
8458 {
8459 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8460 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8461 < htab->elf.hgot->root.u.def.section->size);
8462 bfd_put_32 (output_bfd, val, p);
8463 }
8464 }
8465 else
8466 {
8467 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8468 htab->elf.hgot->root.root.string,
8469 (htab->sgotplt != NULL
8470 ? htab->sgotplt->name : htab->got->name));
8471 bfd_set_error (bfd_error_bad_value);
8472 ret = FALSE;
8473 }
8474
8475 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8476 }
8477
8478 /* Fill in the first entry in the VxWorks procedure linkage table. */
8479 if (splt && splt->size > 0)
8480 {
8481 /* Use the right PLT. */
8482 static const bfd_vma *plt_entry = NULL;
8483 plt_entry = info->shared ?
8484 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8485
8486 if (!info->shared)
8487 {
8488 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8489
8490 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8491 splt->contents + 0);
8492 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8493 splt->contents + 4);
8494 }
8495 else
8496 {
8497 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8498 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8499 }
8500 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8501 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8502 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8503 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8504 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8505 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8506
8507 if (! info->shared)
8508 {
8509 Elf_Internal_Rela rela;
8510 bfd_byte *loc;
8511
8512 loc = htab->srelplt2->contents;
8513
8514 /* Output the @ha relocation for the first instruction. */
8515 rela.r_offset = (htab->plt->output_section->vma
8516 + htab->plt->output_offset
8517 + 2);
8518 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8519 rela.r_addend = 0;
8520 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8521 loc += sizeof (Elf32_External_Rela);
8522
8523 /* Output the @l relocation for the second instruction. */
8524 rela.r_offset = (htab->plt->output_section->vma
8525 + htab->plt->output_offset
8526 + 6);
8527 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8528 rela.r_addend = 0;
8529 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8530 loc += sizeof (Elf32_External_Rela);
8531
8532 /* Fix up the remaining relocations. They may have the wrong
8533 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8534 in which symbols were output. */
8535 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8536 {
8537 Elf_Internal_Rela rel;
8538
8539 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8540 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8541 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8542 loc += sizeof (Elf32_External_Rela);
8543
8544 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8545 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8546 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8547 loc += sizeof (Elf32_External_Rela);
8548
8549 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8550 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8551 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8552 loc += sizeof (Elf32_External_Rela);
8553 }
8554 }
8555 }
8556
8557 if (htab->glink != NULL
8558 && htab->glink->contents != NULL
8559 && htab->elf.dynamic_sections_created)
8560 {
8561 unsigned char *p;
8562 unsigned char *endp;
8563 bfd_vma res0;
8564 unsigned int i;
8565
8566 /*
8567 * PIC glink code is the following:
8568 *
8569 * # ith PLT code stub.
8570 * addis 11,30,(plt+(i-1)*4-got)@ha
8571 * lwz 11,(plt+(i-1)*4-got)@l(11)
8572 * mtctr 11
8573 * bctr
8574 *
8575 * # A table of branches, one for each plt entry.
8576 * # The idea is that the plt call stub loads ctr and r11 with these
8577 * # addresses, so (r11 - res_0) gives the plt index * 4.
8578 * res_0: b PLTresolve
8579 * res_1: b PLTresolve
8580 * .
8581 * # Some number of entries towards the end can be nops
8582 * res_n_m3: nop
8583 * res_n_m2: nop
8584 * res_n_m1:
8585 *
8586 * PLTresolve:
8587 * addis 11,11,(1f-res_0)@ha
8588 * mflr 0
8589 * bcl 20,31,1f
8590 * 1: addi 11,11,(1b-res_0)@l
8591 * mflr 12
8592 * mtlr 0
8593 * sub 11,11,12 # r11 = index * 4
8594 * addis 12,12,(got+4-1b)@ha
8595 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8596 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8597 * mtctr 0
8598 * add 0,11,11
8599 * add 11,0,11 # r11 = index * 12 = reloc offset.
8600 * bctr
8601 */
8602 static const unsigned int pic_plt_resolve[] =
8603 {
8604 ADDIS_11_11,
8605 MFLR_0,
8606 BCL_20_31,
8607 ADDI_11_11,
8608 MFLR_12,
8609 MTLR_0,
8610 SUB_11_11_12,
8611 ADDIS_12_12,
8612 LWZ_0_12,
8613 LWZ_12_12,
8614 MTCTR_0,
8615 ADD_0_11_11,
8616 ADD_11_0_11,
8617 BCTR,
8618 NOP,
8619 NOP
8620 };
8621
8622 /*
8623 * Non-PIC glink code is a little simpler.
8624 *
8625 * # ith PLT code stub.
8626 * lis 11,(plt+(i-1)*4)@ha
8627 * lwz 11,(plt+(i-1)*4)@l(11)
8628 * mtctr 11
8629 * bctr
8630 *
8631 * The branch table is the same, then comes
8632 *
8633 * PLTresolve:
8634 * lis 12,(got+4)@ha
8635 * addis 11,11,(-res_0)@ha
8636 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8637 * addi 11,11,(-res_0)@l # r11 = index * 4
8638 * mtctr 0
8639 * add 0,11,11
8640 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8641 * add 11,0,11 # r11 = index * 12 = reloc offset.
8642 * bctr
8643 */
8644 static const unsigned int plt_resolve[] =
8645 {
8646 LIS_12,
8647 ADDIS_11_11,
8648 LWZ_0_12,
8649 ADDI_11_11,
8650 MTCTR_0,
8651 ADD_0_11_11,
8652 LWZ_12_12,
8653 ADD_11_0_11,
8654 BCTR,
8655 NOP,
8656 NOP,
8657 NOP,
8658 NOP,
8659 NOP,
8660 NOP,
8661 NOP
8662 };
8663
8664 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8665 abort ();
8666 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8667 abort ();
8668
8669 /* Build the branch table, one for each plt entry (less one),
8670 and perhaps some padding. */
8671 p = htab->glink->contents;
8672 p += htab->glink_pltresolve;
8673 endp = htab->glink->contents;
8674 endp += htab->glink->size - GLINK_PLTRESOLVE;
8675 while (p < endp - 8 * 4)
8676 {
8677 bfd_put_32 (output_bfd, B + endp - p, p);
8678 p += 4;
8679 }
8680 while (p < endp)
8681 {
8682 bfd_put_32 (output_bfd, NOP, p);
8683 p += 4;
8684 }
8685
8686 res0 = (htab->glink_pltresolve
8687 + htab->glink->output_section->vma
8688 + htab->glink->output_offset);
8689
8690 /* Last comes the PLTresolve stub. */
8691 if (info->shared)
8692 {
8693 bfd_vma bcl;
8694
8695 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8696 {
8697 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8698 p += 4;
8699 }
8700 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8701
8702 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8703 + htab->glink->output_section->vma
8704 + htab->glink->output_offset);
8705
8706 bfd_put_32 (output_bfd,
8707 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8708 bfd_put_32 (output_bfd,
8709 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8710 bfd_put_32 (output_bfd,
8711 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8712 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8713 {
8714 bfd_put_32 (output_bfd,
8715 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8716 bfd_put_32 (output_bfd,
8717 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8718 }
8719 else
8720 {
8721 bfd_put_32 (output_bfd,
8722 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8723 bfd_put_32 (output_bfd,
8724 LWZ_12_12 + 4, p + 9*4);
8725 }
8726 }
8727 else
8728 {
8729 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8730 {
8731 bfd_put_32 (output_bfd, plt_resolve[i], p);
8732 p += 4;
8733 }
8734 p -= 4 * ARRAY_SIZE (plt_resolve);
8735
8736 bfd_put_32 (output_bfd,
8737 LIS_12 + PPC_HA (got + 4), p + 0*4);
8738 bfd_put_32 (output_bfd,
8739 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8740 bfd_put_32 (output_bfd,
8741 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8742 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8743 {
8744 bfd_put_32 (output_bfd,
8745 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8746 bfd_put_32 (output_bfd,
8747 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8748 }
8749 else
8750 {
8751 bfd_put_32 (output_bfd,
8752 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8753 bfd_put_32 (output_bfd,
8754 LWZ_12_12 + 4, p + 6*4);
8755 }
8756 }
8757 }
8758
8759 return ret;
8760 }
8761 \f
8762 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8763 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8764 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8765 #define TARGET_BIG_NAME "elf32-powerpc"
8766 #define ELF_ARCH bfd_arch_powerpc
8767 #define ELF_MACHINE_CODE EM_PPC
8768 #ifdef __QNXTARGET__
8769 #define ELF_MAXPAGESIZE 0x1000
8770 #else
8771 #define ELF_MAXPAGESIZE 0x10000
8772 #endif
8773 #define ELF_MINPAGESIZE 0x1000
8774 #define ELF_COMMONPAGESIZE 0x1000
8775 #define elf_info_to_howto ppc_elf_info_to_howto
8776
8777 #ifdef EM_CYGNUS_POWERPC
8778 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8779 #endif
8780
8781 #ifdef EM_PPC_OLD
8782 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8783 #endif
8784
8785 #define elf_backend_plt_not_loaded 1
8786 #define elf_backend_can_gc_sections 1
8787 #define elf_backend_can_refcount 1
8788 #define elf_backend_rela_normal 1
8789
8790 #define bfd_elf32_mkobject ppc_elf_mkobject
8791 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8792 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8793 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8794 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8795 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8796 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8797 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8798
8799 #define elf_backend_object_p ppc_elf_object_p
8800 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8801 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8802 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8803 #define elf_backend_relocate_section ppc_elf_relocate_section
8804 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8805 #define elf_backend_check_relocs ppc_elf_check_relocs
8806 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8807 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8808 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8809 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8810 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8811 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8812 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8813 #define elf_backend_fake_sections ppc_elf_fake_sections
8814 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8815 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8816 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8817 #define elf_backend_write_core_note ppc_elf_write_core_note
8818 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8819 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8820 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8821 #define elf_backend_write_section ppc_elf_write_section
8822 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8823 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8824 #define elf_backend_action_discarded ppc_elf_action_discarded
8825 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8826 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8827
8828 #include "elf32-target.h"
8829
8830 /* VxWorks Target */
8831
8832 #undef TARGET_LITTLE_SYM
8833 #undef TARGET_LITTLE_NAME
8834
8835 #undef TARGET_BIG_SYM
8836 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8837 #undef TARGET_BIG_NAME
8838 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8839
8840 /* VxWorks uses the elf default section flags for .plt. */
8841 static const struct bfd_elf_special_section *
8842 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8843 {
8844 if (sec->name == NULL)
8845 return NULL;
8846
8847 if (strcmp (sec->name, ".plt") == 0)
8848 return _bfd_elf_get_sec_type_attr (abfd, sec);
8849
8850 return ppc_elf_get_sec_type_attr (abfd, sec);
8851 }
8852
8853 /* Like ppc_elf_link_hash_table_create, but overrides
8854 appropriately for VxWorks. */
8855 static struct bfd_link_hash_table *
8856 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8857 {
8858 struct bfd_link_hash_table *ret;
8859
8860 ret = ppc_elf_link_hash_table_create (abfd);
8861 if (ret)
8862 {
8863 struct ppc_elf_link_hash_table *htab
8864 = (struct ppc_elf_link_hash_table *)ret;
8865 htab->is_vxworks = 1;
8866 htab->plt_type = PLT_VXWORKS;
8867 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8868 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8869 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8870 }
8871 return ret;
8872 }
8873
8874 /* Tweak magic VxWorks symbols as they are loaded. */
8875 static bfd_boolean
8876 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8877 struct bfd_link_info *info,
8878 Elf_Internal_Sym *sym,
8879 const char **namep ATTRIBUTE_UNUSED,
8880 flagword *flagsp ATTRIBUTE_UNUSED,
8881 asection **secp,
8882 bfd_vma *valp)
8883 {
8884 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8885 valp))
8886 return FALSE;
8887
8888 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8889 }
8890
8891 static void
8892 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8893 {
8894 ppc_elf_final_write_processing(abfd, linker);
8895 elf_vxworks_final_write_processing(abfd, linker);
8896 }
8897
8898 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8899 define it. */
8900 #undef elf_backend_want_plt_sym
8901 #define elf_backend_want_plt_sym 1
8902 #undef elf_backend_want_got_plt
8903 #define elf_backend_want_got_plt 1
8904 #undef elf_backend_got_symbol_offset
8905 #define elf_backend_got_symbol_offset 0
8906 #undef elf_backend_plt_not_loaded
8907 #define elf_backend_plt_not_loaded 0
8908 #undef elf_backend_plt_readonly
8909 #define elf_backend_plt_readonly 1
8910 #undef elf_backend_got_header_size
8911 #define elf_backend_got_header_size 12
8912
8913 #undef bfd_elf32_get_synthetic_symtab
8914
8915 #undef bfd_elf32_bfd_link_hash_table_create
8916 #define bfd_elf32_bfd_link_hash_table_create \
8917 ppc_elf_vxworks_link_hash_table_create
8918 #undef elf_backend_add_symbol_hook
8919 #define elf_backend_add_symbol_hook \
8920 ppc_elf_vxworks_add_symbol_hook
8921 #undef elf_backend_link_output_symbol_hook
8922 #define elf_backend_link_output_symbol_hook \
8923 elf_vxworks_link_output_symbol_hook
8924 #undef elf_backend_final_write_processing
8925 #define elf_backend_final_write_processing \
8926 ppc_elf_vxworks_final_write_processing
8927 #undef elf_backend_get_sec_type_attr
8928 #define elf_backend_get_sec_type_attr \
8929 ppc_elf_vxworks_get_sec_type_attr
8930 #undef elf_backend_emit_relocs
8931 #define elf_backend_emit_relocs \
8932 elf_vxworks_emit_relocs
8933
8934 #undef elf32_bed
8935 #define elf32_bed ppc_elf_vxworks_bed
8936 #undef elf_backend_post_process_headers
8937
8938 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.213235 seconds and 4 git commands to generate.