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* aout-adobe.c (aout_32_bfd_reloc_name_lookup): Define.
[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 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include <stdarg.h>
29 #include "bfd.h"
30 #include "sysdep.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37
38 /* RELA relocations are used here. */
39
40 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc_elf_unhandled_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44
45 /* Branch prediction bit for branch taken relocs. */
46 #define BRANCH_PREDICT_BIT 0x200000
47 /* Mask to set RA in memory instructions. */
48 #define RA_REGISTER_MASK 0x001f0000
49 /* Value to shift register by to insert RA. */
50 #define RA_REGISTER_SHIFT 16
51
52 /* The name of the dynamic interpreter. This is put in the .interp
53 section. */
54 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
55
56 /* For old-style PLT. */
57 /* The number of single-slot PLT entries (the rest use two slots). */
58 #define PLT_NUM_SINGLE_ENTRIES 8192
59
60 /* For new-style .glink and .plt. */
61 #define GLINK_PLTRESOLVE 16*4
62 #define GLINK_ENTRY_SIZE 4*4
63
64 /* VxWorks uses its own plt layout, filled in by the static linker. */
65
66 /* The standard VxWorks PLT entry. */
67 #define VXWORKS_PLT_ENTRY_SIZE 32
68 static const bfd_vma ppc_elf_vxworks_plt_entry
69 [VXWORKS_PLT_ENTRY_SIZE / 4] =
70 {
71 0x3d800000, /* lis r12,0 */
72 0x818c0000, /* lwz r12,0(r12) */
73 0x7d8903a6, /* mtctr r12 */
74 0x4e800420, /* bctr */
75 0x39600000, /* li r11,0 */
76 0x48000000, /* b 14 <.PLT0resolve+0x4> */
77 0x60000000, /* nop */
78 0x60000000, /* nop */
79 };
80 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
81 [VXWORKS_PLT_ENTRY_SIZE / 4] =
82 {
83 0x3d9e0000, /* addis r12,r30,0 */
84 0x818c0000, /* lwz r12,0(r12) */
85 0x7d8903a6, /* mtctr r12 */
86 0x4e800420, /* bctr */
87 0x39600000, /* li r11,0 */
88 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
89 0x60000000, /* nop */
90 0x60000000, /* nop */
91 };
92
93 /* The initial VxWorks PLT entry. */
94 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
95 static const bfd_vma ppc_elf_vxworks_plt0_entry
96 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
97 {
98 0x3d800000, /* lis r12,0 */
99 0x398c0000, /* addi r12,r12,0 */
100 0x800c0008, /* lwz r0,8(r12) */
101 0x7c0903a6, /* mtctr r0 */
102 0x818c0004, /* lwz r12,4(r12) */
103 0x4e800420, /* bctr */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
108 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
109 {
110 0x819e0008, /* lwz r12,8(r30) */
111 0x7d8903a6, /* mtctr r12 */
112 0x819e0004, /* lwz r12,4(r30) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 };
119
120 /* For executables, we have some additional relocations in
121 .rela.plt.unloaded, for the kernel loader. */
122
123 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
124 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
125 /* The number of relocations in the PLTResolve slot. */
126 #define VXWORKS_PLTRESOLVE_RELOCS 2
127 /* The number of relocations in the PLTResolve slot when when creating
128 a shared library. */
129 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
130
131 /* Some instructions. */
132 #define ADDIS_11_11 0x3d6b0000
133 #define ADDIS_11_30 0x3d7e0000
134 #define ADDIS_12_12 0x3d8c0000
135 #define ADDI_11_11 0x396b0000
136 #define ADD_0_11_11 0x7c0b5a14
137 #define ADD_11_0_11 0x7d605a14
138 #define B 0x48000000
139 #define BCL_20_31 0x429f0005
140 #define BCTR 0x4e800420
141 #define LIS_11 0x3d600000
142 #define LIS_12 0x3d800000
143 #define LWZU_0_12 0x840c0000
144 #define LWZ_0_12 0x800c0000
145 #define LWZ_11_11 0x816b0000
146 #define LWZ_11_30 0x817e0000
147 #define LWZ_12_12 0x818c0000
148 #define MFLR_0 0x7c0802a6
149 #define MFLR_12 0x7d8802a6
150 #define MTCTR_0 0x7c0903a6
151 #define MTCTR_11 0x7d6903a6
152 #define MTLR_0 0x7c0803a6
153 #define NOP 0x60000000
154 #define SUB_11_11_12 0x7d6c5850
155
156 /* Offset of tp and dtp pointers from start of TLS block. */
157 #define TP_OFFSET 0x7000
158 #define DTP_OFFSET 0x8000
159 \f
160 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
161
162 static reloc_howto_type ppc_elf_howto_raw[] = {
163 /* This reloc does nothing. */
164 HOWTO (R_PPC_NONE, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 32, /* bitsize */
168 FALSE, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_PPC_NONE", /* name */
173 FALSE, /* partial_inplace */
174 0, /* src_mask */
175 0, /* dst_mask */
176 FALSE), /* pcrel_offset */
177
178 /* A standard 32 bit relocation. */
179 HOWTO (R_PPC_ADDR32, /* type */
180 0, /* rightshift */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
182 32, /* bitsize */
183 FALSE, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC_ADDR32", /* name */
188 FALSE, /* partial_inplace */
189 0, /* src_mask */
190 0xffffffff, /* dst_mask */
191 FALSE), /* pcrel_offset */
192
193 /* An absolute 26 bit branch; the lower two bits must be zero.
194 FIXME: we don't check that, we just clear them. */
195 HOWTO (R_PPC_ADDR24, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 26, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_bitfield, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_PPC_ADDR24", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0x3fffffc, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 /* A standard 16 bit relocation. */
210 HOWTO (R_PPC_ADDR16, /* type */
211 0, /* rightshift */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
213 16, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC_ADDR16", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0xffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* A 16 bit relocation without overflow. */
225 HOWTO (R_PPC_ADDR16_LO, /* type */
226 0, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_PPC_ADDR16_LO", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* The high order 16 bits of an address. */
240 HOWTO (R_PPC_ADDR16_HI, /* type */
241 16, /* rightshift */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
243 16, /* bitsize */
244 FALSE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont, /* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_PPC_ADDR16_HI", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 0xffff, /* dst_mask */
252 FALSE), /* pcrel_offset */
253
254 /* The high order 16 bits of an address, plus 1 if the contents of
255 the low 16 bits, treated as a signed number, is negative. */
256 HOWTO (R_PPC_ADDR16_HA, /* type */
257 16, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 ppc_elf_addr16_ha_reloc, /* special_function */
264 "R_PPC_ADDR16_HA", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* An absolute 16 bit branch; the lower two bits must be zero.
271 FIXME: we don't check that, we just clear them. */
272 HOWTO (R_PPC_ADDR14, /* type */
273 0, /* rightshift */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_bitfield, /* complain_on_overflow */
279 bfd_elf_generic_reloc, /* special_function */
280 "R_PPC_ADDR14", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0xfffc, /* dst_mask */
284 FALSE), /* pcrel_offset */
285
286 /* An absolute 16 bit branch, for which bit 10 should be set to
287 indicate that the branch is expected to be taken. The lower two
288 bits must be zero. */
289 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 16, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC_ADDR14_BRTAKEN",/* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xfffc, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 16 bit branch, for which bit 10 should be set to
304 indicate that the branch is not expected to be taken. The lower
305 two bits must be zero. */
306 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
307 0, /* rightshift */
308 2, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_bitfield, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC_ADDR14_BRNTAKEN",/* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xfffc, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* A relative 26 bit branch; the lower two bits must be zero. */
321 HOWTO (R_PPC_REL24, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 26, /* bitsize */
325 TRUE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_signed, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_PPC_REL24", /* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0x3fffffc, /* dst_mask */
333 TRUE), /* pcrel_offset */
334
335 /* A relative 16 bit branch; the lower two bits must be zero. */
336 HOWTO (R_PPC_REL14, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 16, /* bitsize */
340 TRUE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_signed, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_PPC_REL14", /* name */
345 FALSE, /* partial_inplace */
346 0, /* src_mask */
347 0xfffc, /* dst_mask */
348 TRUE), /* pcrel_offset */
349
350 /* A relative 16 bit branch. Bit 10 should be set to indicate that
351 the branch is expected to be taken. The lower two bits must be
352 zero. */
353 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
354 0, /* rightshift */
355 2, /* size (0 = byte, 1 = short, 2 = long) */
356 16, /* bitsize */
357 TRUE, /* pc_relative */
358 0, /* bitpos */
359 complain_overflow_signed, /* complain_on_overflow */
360 bfd_elf_generic_reloc, /* special_function */
361 "R_PPC_REL14_BRTAKEN", /* name */
362 FALSE, /* partial_inplace */
363 0, /* src_mask */
364 0xfffc, /* dst_mask */
365 TRUE), /* pcrel_offset */
366
367 /* A relative 16 bit branch. Bit 10 should be set to indicate that
368 the branch is not expected to be taken. The lower two bits must
369 be zero. */
370 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
371 0, /* rightshift */
372 2, /* size (0 = byte, 1 = short, 2 = long) */
373 16, /* bitsize */
374 TRUE, /* pc_relative */
375 0, /* bitpos */
376 complain_overflow_signed, /* complain_on_overflow */
377 bfd_elf_generic_reloc, /* special_function */
378 "R_PPC_REL14_BRNTAKEN",/* name */
379 FALSE, /* partial_inplace */
380 0, /* src_mask */
381 0xfffc, /* dst_mask */
382 TRUE), /* pcrel_offset */
383
384 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
385 symbol. */
386 HOWTO (R_PPC_GOT16, /* type */
387 0, /* rightshift */
388 1, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_PPC_GOT16", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0xffff, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
401 the symbol. */
402 HOWTO (R_PPC_GOT16_LO, /* type */
403 0, /* rightshift */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 FALSE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_dont, /* complain_on_overflow */
409 bfd_elf_generic_reloc, /* special_function */
410 "R_PPC_GOT16_LO", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0xffff, /* dst_mask */
414 FALSE), /* pcrel_offset */
415
416 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
417 the symbol. */
418 HOWTO (R_PPC_GOT16_HI, /* type */
419 16, /* rightshift */
420 1, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_bitfield, /* complain_on_overflow */
425 bfd_elf_generic_reloc, /* special_function */
426 "R_PPC_GOT16_HI", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0xffff, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
433 the symbol. */
434 HOWTO (R_PPC_GOT16_HA, /* type */
435 16, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_bitfield, /* complain_on_overflow */
441 ppc_elf_addr16_ha_reloc, /* special_function */
442 "R_PPC_GOT16_HA", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC_REL24, but referring to the procedure linkage table
449 entry for the symbol. */
450 HOWTO (R_PPC_PLTREL24, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 26, /* bitsize */
454 TRUE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_signed, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_PPC_PLTREL24", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0x3fffffc, /* dst_mask */
462 TRUE), /* pcrel_offset */
463
464 /* This is used only by the dynamic linker. The symbol should exist
465 both in the object being run and in some shared library. The
466 dynamic linker copies the data addressed by the symbol from the
467 shared library into the object, because the object being
468 run has to have the data at some particular address. */
469 HOWTO (R_PPC_COPY, /* type */
470 0, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 32, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_bitfield, /* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_PPC_COPY", /* name */
478 FALSE, /* partial_inplace */
479 0, /* src_mask */
480 0, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Like R_PPC_ADDR32, but used when setting global offset table
484 entries. */
485 HOWTO (R_PPC_GLOB_DAT, /* type */
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 32, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_bitfield, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_PPC_GLOB_DAT", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0xffffffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Marks a procedure linkage table entry for a symbol. */
500 HOWTO (R_PPC_JMP_SLOT, /* type */
501 0, /* rightshift */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
503 32, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_bitfield, /* complain_on_overflow */
507 bfd_elf_generic_reloc, /* special_function */
508 "R_PPC_JMP_SLOT", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Used only by the dynamic linker. When the object is run, this
515 longword is set to the load address of the object, plus the
516 addend. */
517 HOWTO (R_PPC_RELATIVE, /* type */
518 0, /* rightshift */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
520 32, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_bitfield, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_PPC_RELATIVE", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 0xffffffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* Like R_PPC_REL24, but uses the value of the symbol within the
532 object rather than the final value. Normally used for
533 _GLOBAL_OFFSET_TABLE_. */
534 HOWTO (R_PPC_LOCAL24PC, /* type */
535 0, /* rightshift */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
537 26, /* bitsize */
538 TRUE, /* pc_relative */
539 0, /* bitpos */
540 complain_overflow_signed, /* complain_on_overflow */
541 bfd_elf_generic_reloc, /* special_function */
542 "R_PPC_LOCAL24PC", /* name */
543 FALSE, /* partial_inplace */
544 0, /* src_mask */
545 0x3fffffc, /* dst_mask */
546 TRUE), /* pcrel_offset */
547
548 /* Like R_PPC_ADDR32, but may be unaligned. */
549 HOWTO (R_PPC_UADDR32, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 32, /* bitsize */
553 FALSE, /* pc_relative */
554 0, /* bitpos */
555 complain_overflow_bitfield, /* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_PPC_UADDR32", /* name */
558 FALSE, /* partial_inplace */
559 0, /* src_mask */
560 0xffffffff, /* dst_mask */
561 FALSE), /* pcrel_offset */
562
563 /* Like R_PPC_ADDR16, but may be unaligned. */
564 HOWTO (R_PPC_UADDR16, /* type */
565 0, /* rightshift */
566 1, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_bitfield, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_PPC_UADDR16", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 0xffff, /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* 32-bit PC relative */
579 HOWTO (R_PPC_REL32, /* type */
580 0, /* rightshift */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
582 32, /* bitsize */
583 TRUE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_bitfield, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 "R_PPC_REL32", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 0xffffffff, /* dst_mask */
591 TRUE), /* pcrel_offset */
592
593 /* 32-bit relocation to the symbol's procedure linkage table.
594 FIXME: not supported. */
595 HOWTO (R_PPC_PLT32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_bitfield, /* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_PPC_PLT32", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
610 FIXME: not supported. */
611 HOWTO (R_PPC_PLTREL32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 TRUE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC_PLTREL32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0, /* dst_mask */
623 TRUE), /* pcrel_offset */
624
625 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
626 the symbol. */
627 HOWTO (R_PPC_PLT16_LO, /* type */
628 0, /* rightshift */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
630 16, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_dont, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC_PLT16_LO", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC_PLT16_HI, /* type */
644 16, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_bitfield, /* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_PPC_PLT16_HI", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC_PLT16_HA, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_bitfield, /* complain_on_overflow */
666 ppc_elf_addr16_ha_reloc, /* special_function */
667 "R_PPC_PLT16_HA", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
674 small data items. */
675 HOWTO (R_PPC_SDAREL16, /* type */
676 0, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed, /* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_PPC_SDAREL16", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* 16-bit section relative relocation. */
690 HOWTO (R_PPC_SECTOFF, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_bitfield, /* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_PPC_SECTOFF", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 16-bit lower half section relative relocation. */
705 HOWTO (R_PPC_SECTOFF_LO, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 bfd_elf_generic_reloc, /* special_function */
713 "R_PPC_SECTOFF_LO", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit upper half section relative relocation. */
720 HOWTO (R_PPC_SECTOFF_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_bitfield, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC_SECTOFF_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half adjusted section relative relocation. */
735 HOWTO (R_PPC_SECTOFF_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_bitfield, /* complain_on_overflow */
742 ppc_elf_addr16_ha_reloc, /* special_function */
743 "R_PPC_SECTOFF_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* Marker reloc for TLS. */
750 HOWTO (R_PPC_TLS,
751 0, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 32, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC_TLS", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Computes the load module index of the load module that contains the
765 definition of its TLS sym. */
766 HOWTO (R_PPC_DTPMOD32,
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc_elf_unhandled_reloc, /* special_function */
774 "R_PPC_DTPMOD32", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffffffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* Computes a dtv-relative displacement, the difference between the value
781 of sym+add and the base address of the thread-local storage block that
782 contains the definition of sym, minus 0x8000. */
783 HOWTO (R_PPC_DTPREL32,
784 0, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 32, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_dont, /* complain_on_overflow */
790 ppc_elf_unhandled_reloc, /* special_function */
791 "R_PPC_DTPREL32", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffffffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* A 16 bit dtprel reloc. */
798 HOWTO (R_PPC_DTPREL16,
799 0, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_signed, /* complain_on_overflow */
805 ppc_elf_unhandled_reloc, /* special_function */
806 "R_PPC_DTPREL16", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* Like DTPREL16, but no overflow. */
813 HOWTO (R_PPC_DTPREL16_LO,
814 0, /* rightshift */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
816 16, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 ppc_elf_unhandled_reloc, /* special_function */
821 "R_PPC_DTPREL16_LO", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* Like DTPREL16_LO, but next higher group of 16 bits. */
828 HOWTO (R_PPC_DTPREL16_HI,
829 16, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 ppc_elf_unhandled_reloc, /* special_function */
836 "R_PPC_DTPREL16_HI", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* Like DTPREL16_HI, but adjust for low 16 bits. */
843 HOWTO (R_PPC_DTPREL16_HA,
844 16, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 ppc_elf_unhandled_reloc, /* special_function */
851 "R_PPC_DTPREL16_HA", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* Computes a tp-relative displacement, the difference between the value of
858 sym+add and the value of the thread pointer (r13). */
859 HOWTO (R_PPC_TPREL32,
860 0, /* rightshift */
861 2, /* size (0 = byte, 1 = short, 2 = long) */
862 32, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc_elf_unhandled_reloc, /* special_function */
867 "R_PPC_TPREL32", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffffffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* A 16 bit tprel reloc. */
874 HOWTO (R_PPC_TPREL16,
875 0, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_signed, /* complain_on_overflow */
881 ppc_elf_unhandled_reloc, /* special_function */
882 "R_PPC_TPREL16", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* Like TPREL16, but no overflow. */
889 HOWTO (R_PPC_TPREL16_LO,
890 0, /* rightshift */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
892 16, /* bitsize */
893 FALSE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 ppc_elf_unhandled_reloc, /* special_function */
897 "R_PPC_TPREL16_LO", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
902
903 /* Like TPREL16_LO, but next higher group of 16 bits. */
904 HOWTO (R_PPC_TPREL16_HI,
905 16, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 ppc_elf_unhandled_reloc, /* special_function */
912 "R_PPC_TPREL16_HI", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* Like TPREL16_HI, but adjust for low 16 bits. */
919 HOWTO (R_PPC_TPREL16_HA,
920 16, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc_elf_unhandled_reloc, /* special_function */
927 "R_PPC_TPREL16_HA", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
934 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
935 to the first entry. */
936 HOWTO (R_PPC_GOT_TLSGD16,
937 0, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_signed, /* complain_on_overflow */
943 ppc_elf_unhandled_reloc, /* special_function */
944 "R_PPC_GOT_TLSGD16", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* Like GOT_TLSGD16, but no overflow. */
951 HOWTO (R_PPC_GOT_TLSGD16_LO,
952 0, /* rightshift */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
954 16, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc_elf_unhandled_reloc, /* special_function */
959 "R_PPC_GOT_TLSGD16_LO", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
966 HOWTO (R_PPC_GOT_TLSGD16_HI,
967 16, /* rightshift */
968 1, /* size (0 = byte, 1 = short, 2 = long) */
969 16, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont, /* complain_on_overflow */
973 ppc_elf_unhandled_reloc, /* special_function */
974 "R_PPC_GOT_TLSGD16_HI", /* name */
975 FALSE, /* partial_inplace */
976 0, /* src_mask */
977 0xffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
981 HOWTO (R_PPC_GOT_TLSGD16_HA,
982 16, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc_elf_unhandled_reloc, /* special_function */
989 "R_PPC_GOT_TLSGD16_HA", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
996 with values (sym+add)@dtpmod and zero, and computes the offset to the
997 first entry. */
998 HOWTO (R_PPC_GOT_TLSLD16,
999 0, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc_elf_unhandled_reloc, /* special_function */
1006 "R_PPC_GOT_TLSLD16", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* Like GOT_TLSLD16, but no overflow. */
1013 HOWTO (R_PPC_GOT_TLSLD16_LO,
1014 0, /* rightshift */
1015 1, /* size (0 = byte, 1 = short, 2 = long) */
1016 16, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_dont, /* complain_on_overflow */
1020 ppc_elf_unhandled_reloc, /* special_function */
1021 "R_PPC_GOT_TLSLD16_LO", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 0xffff, /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1028 HOWTO (R_PPC_GOT_TLSLD16_HI,
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont, /* complain_on_overflow */
1035 ppc_elf_unhandled_reloc, /* special_function */
1036 "R_PPC_GOT_TLSLD16_HI", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1043 HOWTO (R_PPC_GOT_TLSLD16_HA,
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc_elf_unhandled_reloc, /* special_function */
1051 "R_PPC_GOT_TLSLD16_HA", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1058 the offset to the entry. */
1059 HOWTO (R_PPC_GOT_DTPREL16,
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_signed, /* complain_on_overflow */
1066 ppc_elf_unhandled_reloc, /* special_function */
1067 "R_PPC_GOT_DTPREL16", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like GOT_DTPREL16, but no overflow. */
1074 HOWTO (R_PPC_GOT_DTPREL16_LO,
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont, /* complain_on_overflow */
1081 ppc_elf_unhandled_reloc, /* special_function */
1082 "R_PPC_GOT_DTPREL16_LO", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xffff, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1089 HOWTO (R_PPC_GOT_DTPREL16_HI,
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont, /* complain_on_overflow */
1096 ppc_elf_unhandled_reloc, /* special_function */
1097 "R_PPC_GOT_DTPREL16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1104 HOWTO (R_PPC_GOT_DTPREL16_HA,
1105 16, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc_elf_unhandled_reloc, /* special_function */
1112 "R_PPC_GOT_DTPREL16_HA", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xffff, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1119 offset to the entry. */
1120 HOWTO (R_PPC_GOT_TPREL16,
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_signed, /* complain_on_overflow */
1127 ppc_elf_unhandled_reloc, /* special_function */
1128 "R_PPC_GOT_TPREL16", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xffff, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like GOT_TPREL16, but no overflow. */
1135 HOWTO (R_PPC_GOT_TPREL16_LO,
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc_elf_unhandled_reloc, /* special_function */
1143 "R_PPC_GOT_TPREL16_LO", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xffff, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1150 HOWTO (R_PPC_GOT_TPREL16_HI,
1151 16, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_dont, /* complain_on_overflow */
1157 ppc_elf_unhandled_reloc, /* special_function */
1158 "R_PPC_GOT_TPREL16_HI", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xffff, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1165 HOWTO (R_PPC_GOT_TPREL16_HA,
1166 16, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc_elf_unhandled_reloc, /* special_function */
1173 "R_PPC_GOT_TPREL16_HA", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xffff, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* The remaining relocs are from the Embedded ELF ABI, and are not
1180 in the SVR4 ELF ABI. */
1181
1182 /* 32 bit value resulting from the addend minus the symbol. */
1183 HOWTO (R_PPC_EMB_NADDR32, /* type */
1184 0, /* rightshift */
1185 2, /* size (0 = byte, 1 = short, 2 = long) */
1186 32, /* bitsize */
1187 FALSE, /* pc_relative */
1188 0, /* bitpos */
1189 complain_overflow_bitfield, /* complain_on_overflow */
1190 bfd_elf_generic_reloc, /* special_function */
1191 "R_PPC_EMB_NADDR32", /* name */
1192 FALSE, /* partial_inplace */
1193 0, /* src_mask */
1194 0xffffffff, /* dst_mask */
1195 FALSE), /* pcrel_offset */
1196
1197 /* 16 bit value resulting from the addend minus the symbol. */
1198 HOWTO (R_PPC_EMB_NADDR16, /* type */
1199 0, /* rightshift */
1200 1, /* size (0 = byte, 1 = short, 2 = long) */
1201 16, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_bitfield, /* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_PPC_EMB_NADDR16", /* name */
1207 FALSE, /* partial_inplace */
1208 0, /* src_mask */
1209 0xffff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 /* 16 bit value resulting from the addend minus the symbol. */
1213 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1214 0, /* rightshift */
1215 1, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont,/* complain_on_overflow */
1220 bfd_elf_generic_reloc, /* special_function */
1221 "R_PPC_EMB_ADDR16_LO", /* name */
1222 FALSE, /* partial_inplace */
1223 0, /* src_mask */
1224 0xffff, /* dst_mask */
1225 FALSE), /* pcrel_offset */
1226
1227 /* The high order 16 bits of the addend minus the symbol. */
1228 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1229 16, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 bfd_elf_generic_reloc, /* special_function */
1236 "R_PPC_EMB_NADDR16_HI", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xffff, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* The high order 16 bits of the result of the addend minus the address,
1243 plus 1 if the contents of the low 16 bits, treated as a signed number,
1244 is negative. */
1245 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1246 16, /* rightshift */
1247 1, /* size (0 = byte, 1 = short, 2 = long) */
1248 16, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont, /* complain_on_overflow */
1252 ppc_elf_addr16_ha_reloc, /* special_function */
1253 "R_PPC_EMB_NADDR16_HA", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 0xffff, /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* 16 bit value resulting from allocating a 4 byte word to hold an
1260 address in the .sdata section, and returning the offset from
1261 _SDA_BASE_ for that relocation. */
1262 HOWTO (R_PPC_EMB_SDAI16, /* type */
1263 0, /* rightshift */
1264 1, /* size (0 = byte, 1 = short, 2 = long) */
1265 16, /* bitsize */
1266 FALSE, /* pc_relative */
1267 0, /* bitpos */
1268 complain_overflow_bitfield, /* complain_on_overflow */
1269 bfd_elf_generic_reloc, /* special_function */
1270 "R_PPC_EMB_SDAI16", /* name */
1271 FALSE, /* partial_inplace */
1272 0, /* src_mask */
1273 0xffff, /* dst_mask */
1274 FALSE), /* pcrel_offset */
1275
1276 /* 16 bit value resulting from allocating a 4 byte word to hold an
1277 address in the .sdata2 section, and returning the offset from
1278 _SDA2_BASE_ for that relocation. */
1279 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_bitfield, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC_EMB_SDA2I16", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1294 small data items. */
1295 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1296 0, /* rightshift */
1297 1, /* size (0 = byte, 1 = short, 2 = long) */
1298 16, /* bitsize */
1299 FALSE, /* pc_relative */
1300 0, /* bitpos */
1301 complain_overflow_signed, /* complain_on_overflow */
1302 bfd_elf_generic_reloc, /* special_function */
1303 "R_PPC_EMB_SDA2REL", /* name */
1304 FALSE, /* partial_inplace */
1305 0, /* src_mask */
1306 0xffff, /* dst_mask */
1307 FALSE), /* pcrel_offset */
1308
1309 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1310 signed offset from the appropriate base, and filling in the register
1311 field with the appropriate register (0, 2, or 13). */
1312 HOWTO (R_PPC_EMB_SDA21, /* type */
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 16, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_signed, /* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_PPC_EMB_SDA21", /* name */
1321 FALSE, /* partial_inplace */
1322 0, /* src_mask */
1323 0xffff, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 /* Relocation not handled: R_PPC_EMB_MRKREF */
1327 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1328 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1331 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1332
1333 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1334 in the 16 bit signed offset from the appropriate base, and filling in the
1335 register field with the appropriate register (0, 2, or 13). */
1336 HOWTO (R_PPC_EMB_RELSDA, /* type */
1337 0, /* rightshift */
1338 1, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 TRUE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_signed, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC_EMB_RELSDA", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* A 16 bit relative relocation. */
1351 HOWTO (R_PPC_REL16, /* type */
1352 0, /* rightshift */
1353 1, /* size (0 = byte, 1 = short, 2 = long) */
1354 16, /* bitsize */
1355 TRUE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_bitfield, /* complain_on_overflow */
1358 bfd_elf_generic_reloc, /* special_function */
1359 "R_PPC_REL16", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 0xffff, /* dst_mask */
1363 TRUE), /* pcrel_offset */
1364
1365 /* A 16 bit relative relocation without overflow. */
1366 HOWTO (R_PPC_REL16_LO, /* type */
1367 0, /* rightshift */
1368 1, /* size (0 = byte, 1 = short, 2 = long) */
1369 16, /* bitsize */
1370 TRUE, /* pc_relative */
1371 0, /* bitpos */
1372 complain_overflow_dont,/* complain_on_overflow */
1373 bfd_elf_generic_reloc, /* special_function */
1374 "R_PPC_REL16_LO", /* name */
1375 FALSE, /* partial_inplace */
1376 0, /* src_mask */
1377 0xffff, /* dst_mask */
1378 TRUE), /* pcrel_offset */
1379
1380 /* The high order 16 bits of a relative address. */
1381 HOWTO (R_PPC_REL16_HI, /* type */
1382 16, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 TRUE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_dont, /* complain_on_overflow */
1388 bfd_elf_generic_reloc, /* special_function */
1389 "R_PPC_REL16_HI", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 TRUE), /* pcrel_offset */
1394
1395 /* The high order 16 bits of a relative address, plus 1 if the contents of
1396 the low 16 bits, treated as a signed number, is negative. */
1397 HOWTO (R_PPC_REL16_HA, /* type */
1398 16, /* rightshift */
1399 1, /* size (0 = byte, 1 = short, 2 = long) */
1400 16, /* bitsize */
1401 TRUE, /* pc_relative */
1402 0, /* bitpos */
1403 complain_overflow_dont, /* complain_on_overflow */
1404 ppc_elf_addr16_ha_reloc, /* special_function */
1405 "R_PPC_REL16_HA", /* name */
1406 FALSE, /* partial_inplace */
1407 0, /* src_mask */
1408 0xffff, /* dst_mask */
1409 TRUE), /* pcrel_offset */
1410
1411 /* GNU extension to record C++ vtable hierarchy. */
1412 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1413 0, /* rightshift */
1414 0, /* size (0 = byte, 1 = short, 2 = long) */
1415 0, /* bitsize */
1416 FALSE, /* pc_relative */
1417 0, /* bitpos */
1418 complain_overflow_dont, /* complain_on_overflow */
1419 NULL, /* special_function */
1420 "R_PPC_GNU_VTINHERIT", /* name */
1421 FALSE, /* partial_inplace */
1422 0, /* src_mask */
1423 0, /* dst_mask */
1424 FALSE), /* pcrel_offset */
1425
1426 /* GNU extension to record C++ vtable member usage. */
1427 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1428 0, /* rightshift */
1429 0, /* size (0 = byte, 1 = short, 2 = long) */
1430 0, /* bitsize */
1431 FALSE, /* pc_relative */
1432 0, /* bitpos */
1433 complain_overflow_dont, /* complain_on_overflow */
1434 NULL, /* special_function */
1435 "R_PPC_GNU_VTENTRY", /* name */
1436 FALSE, /* partial_inplace */
1437 0, /* src_mask */
1438 0, /* dst_mask */
1439 FALSE), /* pcrel_offset */
1440
1441 /* Phony reloc to handle AIX style TOC entries. */
1442 HOWTO (R_PPC_TOC16, /* type */
1443 0, /* rightshift */
1444 1, /* size (0 = byte, 1 = short, 2 = long) */
1445 16, /* bitsize */
1446 FALSE, /* pc_relative */
1447 0, /* bitpos */
1448 complain_overflow_signed, /* complain_on_overflow */
1449 bfd_elf_generic_reloc, /* special_function */
1450 "R_PPC_TOC16", /* name */
1451 FALSE, /* partial_inplace */
1452 0, /* src_mask */
1453 0xffff, /* dst_mask */
1454 FALSE), /* pcrel_offset */
1455 };
1456 \f
1457 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1458
1459 static void
1460 ppc_elf_howto_init (void)
1461 {
1462 unsigned int i, type;
1463
1464 for (i = 0;
1465 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1466 i++)
1467 {
1468 type = ppc_elf_howto_raw[i].type;
1469 if (type >= (sizeof (ppc_elf_howto_table)
1470 / sizeof (ppc_elf_howto_table[0])))
1471 abort ();
1472 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1473 }
1474 }
1475
1476 static reloc_howto_type *
1477 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1478 bfd_reloc_code_real_type code)
1479 {
1480 enum elf_ppc_reloc_type r;
1481
1482 /* Initialize howto table if not already done. */
1483 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1484 ppc_elf_howto_init ();
1485
1486 switch (code)
1487 {
1488 default:
1489 return NULL;
1490
1491 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1492 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1493 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1494 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1495 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1496 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1497 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1498 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1499 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1500 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1501 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1502 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1503 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1504 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1505 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1506 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1507 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1508 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1509 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1510 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1511 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1512 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1513 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1514 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1515 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1516 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1517 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1518 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1519 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1520 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1521 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1522 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1523 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1524 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1525 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1526 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1527 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1528 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1529 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1530 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1531 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1532 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1533 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1534 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1535 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1536 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1537 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1554 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1559 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1562 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1563 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1564 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1565 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1568 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1569 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1570 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1571 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1572 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1573 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1574 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1575 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1576 }
1577
1578 return ppc_elf_howto_table[r];
1579 };
1580
1581 static reloc_howto_type *
1582 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1583 const char *r_name)
1584 {
1585 unsigned int i;
1586
1587 for (i = 0;
1588 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1589 i++)
1590 if (ppc_elf_howto_raw[i].name != NULL
1591 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1592 return &ppc_elf_howto_raw[i];
1593
1594 return NULL;
1595 }
1596
1597 /* Set the howto pointer for a PowerPC ELF reloc. */
1598
1599 static void
1600 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1601 arelent *cache_ptr,
1602 Elf_Internal_Rela *dst)
1603 {
1604 /* Initialize howto table if not already done. */
1605 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1606 ppc_elf_howto_init ();
1607
1608 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1609 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1610 }
1611
1612 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1613
1614 static bfd_reloc_status_type
1615 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1616 arelent *reloc_entry,
1617 asymbol *symbol,
1618 void *data ATTRIBUTE_UNUSED,
1619 asection *input_section,
1620 bfd *output_bfd,
1621 char **error_message ATTRIBUTE_UNUSED)
1622 {
1623 bfd_vma relocation;
1624
1625 if (output_bfd != NULL)
1626 {
1627 reloc_entry->address += input_section->output_offset;
1628 return bfd_reloc_ok;
1629 }
1630
1631 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1632 return bfd_reloc_outofrange;
1633
1634 if (bfd_is_com_section (symbol->section))
1635 relocation = 0;
1636 else
1637 relocation = symbol->value;
1638
1639 relocation += symbol->section->output_section->vma;
1640 relocation += symbol->section->output_offset;
1641 relocation += reloc_entry->addend;
1642 if (reloc_entry->howto->pc_relative)
1643 relocation -= reloc_entry->address;
1644
1645 reloc_entry->addend += (relocation & 0x8000) << 1;
1646
1647 return bfd_reloc_continue;
1648 }
1649
1650 static bfd_reloc_status_type
1651 ppc_elf_unhandled_reloc (bfd *abfd,
1652 arelent *reloc_entry,
1653 asymbol *symbol,
1654 void *data,
1655 asection *input_section,
1656 bfd *output_bfd,
1657 char **error_message)
1658 {
1659 /* If this is a relocatable link (output_bfd test tells us), just
1660 call the generic function. Any adjustment will be done at final
1661 link time. */
1662 if (output_bfd != NULL)
1663 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1664 input_section, output_bfd, error_message);
1665
1666 if (error_message != NULL)
1667 {
1668 static char buf[60];
1669 sprintf (buf, _("generic linker can't handle %s"),
1670 reloc_entry->howto->name);
1671 *error_message = buf;
1672 }
1673 return bfd_reloc_dangerous;
1674 }
1675 \f
1676 /* Sections created by the linker. */
1677
1678 typedef struct elf_linker_section
1679 {
1680 /* Pointer to the bfd section. */
1681 asection *section;
1682 /* Section name. */
1683 const char *name;
1684 /* Associated bss section name. */
1685 const char *bss_name;
1686 /* Associated symbol name. */
1687 const char *sym_name;
1688 /* Associated symbol. */
1689 struct elf_link_hash_entry *sym;
1690 } elf_linker_section_t;
1691
1692 /* Linked list of allocated pointer entries. This hangs off of the
1693 symbol lists, and provides allows us to return different pointers,
1694 based on different addend's. */
1695
1696 typedef struct elf_linker_section_pointers
1697 {
1698 /* next allocated pointer for this symbol */
1699 struct elf_linker_section_pointers *next;
1700 /* offset of pointer from beginning of section */
1701 bfd_vma offset;
1702 /* addend used */
1703 bfd_vma addend;
1704 /* which linker section this is */
1705 elf_linker_section_t *lsect;
1706 } elf_linker_section_pointers_t;
1707
1708 struct ppc_elf_obj_tdata
1709 {
1710 struct elf_obj_tdata elf;
1711
1712 /* A mapping from local symbols to offsets into the various linker
1713 sections added. This is index by the symbol index. */
1714 elf_linker_section_pointers_t **linker_section_pointers;
1715 };
1716
1717 #define ppc_elf_tdata(bfd) \
1718 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1719
1720 #define elf_local_ptr_offsets(bfd) \
1721 (ppc_elf_tdata (bfd)->linker_section_pointers)
1722
1723 /* Override the generic function because we store some extras. */
1724
1725 static bfd_boolean
1726 ppc_elf_mkobject (bfd *abfd)
1727 {
1728 if (abfd->tdata.any == NULL)
1729 {
1730 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1731 abfd->tdata.any = bfd_zalloc (abfd, amt);
1732 if (abfd->tdata.any == NULL)
1733 return FALSE;
1734 }
1735 return bfd_elf_mkobject (abfd);
1736 }
1737
1738 /* Fix bad default arch selected for a 32 bit input bfd when the
1739 default is 64 bit. */
1740
1741 static bfd_boolean
1742 ppc_elf_object_p (bfd *abfd)
1743 {
1744 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1745 {
1746 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1747
1748 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1749 {
1750 /* Relies on arch after 64 bit default being 32 bit default. */
1751 abfd->arch_info = abfd->arch_info->next;
1752 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1753 }
1754 }
1755 return TRUE;
1756 }
1757
1758 /* Function to set whether a module needs the -mrelocatable bit set. */
1759
1760 static bfd_boolean
1761 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1762 {
1763 BFD_ASSERT (!elf_flags_init (abfd)
1764 || elf_elfheader (abfd)->e_flags == flags);
1765
1766 elf_elfheader (abfd)->e_flags = flags;
1767 elf_flags_init (abfd) = TRUE;
1768 return TRUE;
1769 }
1770
1771 /* Support for core dump NOTE sections. */
1772
1773 static bfd_boolean
1774 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1775 {
1776 int offset;
1777 unsigned int size;
1778
1779 switch (note->descsz)
1780 {
1781 default:
1782 return FALSE;
1783
1784 case 268: /* Linux/PPC. */
1785 /* pr_cursig */
1786 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1787
1788 /* pr_pid */
1789 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1790
1791 /* pr_reg */
1792 offset = 72;
1793 size = 192;
1794
1795 break;
1796 }
1797
1798 /* Make a ".reg/999" section. */
1799 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1800 size, note->descpos + offset);
1801 }
1802
1803 static bfd_boolean
1804 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1805 {
1806 switch (note->descsz)
1807 {
1808 default:
1809 return FALSE;
1810
1811 case 128: /* Linux/PPC elf_prpsinfo. */
1812 elf_tdata (abfd)->core_program
1813 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1814 elf_tdata (abfd)->core_command
1815 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1816 }
1817
1818 /* Note that for some reason, a spurious space is tacked
1819 onto the end of the args in some (at least one anyway)
1820 implementations, so strip it off if it exists. */
1821
1822 {
1823 char *command = elf_tdata (abfd)->core_command;
1824 int n = strlen (command);
1825
1826 if (0 < n && command[n - 1] == ' ')
1827 command[n - 1] = '\0';
1828 }
1829
1830 return TRUE;
1831 }
1832
1833 static char *
1834 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1835 {
1836 switch (note_type)
1837 {
1838 default:
1839 return NULL;
1840
1841 case NT_PRPSINFO:
1842 {
1843 char data[128];
1844 va_list ap;
1845
1846 va_start (ap, note_type);
1847 memset (data, 0, 32);
1848 strncpy (data + 32, va_arg (ap, const char *), 16);
1849 strncpy (data + 48, va_arg (ap, const char *), 80);
1850 va_end (ap);
1851 return elfcore_write_note (abfd, buf, bufsiz,
1852 "CORE", note_type, data, sizeof (data));
1853 }
1854
1855 case NT_PRSTATUS:
1856 {
1857 char data[268];
1858 va_list ap;
1859 long pid;
1860 int cursig;
1861 const void *greg;
1862
1863 va_start (ap, note_type);
1864 memset (data, 0, 72);
1865 pid = va_arg (ap, long);
1866 bfd_put_32 (abfd, pid, data + 24);
1867 cursig = va_arg (ap, int);
1868 bfd_put_16 (abfd, cursig, data + 12);
1869 greg = va_arg (ap, const void *);
1870 memcpy (data + 72, greg, 192);
1871 memset (data + 264, 0, 4);
1872 va_end (ap);
1873 return elfcore_write_note (abfd, buf, bufsiz,
1874 "CORE", note_type, data, sizeof (data));
1875 }
1876 }
1877 }
1878
1879 /* Return address for Ith PLT stub in section PLT, for relocation REL
1880 or (bfd_vma) -1 if it should not be included. */
1881
1882 static bfd_vma
1883 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1884 const asection *plt ATTRIBUTE_UNUSED,
1885 const arelent *rel)
1886 {
1887 return rel->address;
1888 }
1889
1890 /* Handle a PowerPC specific section when reading an object file. This
1891 is called when bfd_section_from_shdr finds a section with an unknown
1892 type. */
1893
1894 static bfd_boolean
1895 ppc_elf_section_from_shdr (bfd *abfd,
1896 Elf_Internal_Shdr *hdr,
1897 const char *name,
1898 int shindex)
1899 {
1900 asection *newsect;
1901 flagword flags;
1902
1903 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1904 return FALSE;
1905
1906 newsect = hdr->bfd_section;
1907 flags = bfd_get_section_flags (abfd, newsect);
1908 if (hdr->sh_flags & SHF_EXCLUDE)
1909 flags |= SEC_EXCLUDE;
1910
1911 if (hdr->sh_type == SHT_ORDERED)
1912 flags |= SEC_SORT_ENTRIES;
1913
1914 bfd_set_section_flags (abfd, newsect, flags);
1915 return TRUE;
1916 }
1917
1918 /* Set up any other section flags and such that may be necessary. */
1919
1920 static bfd_boolean
1921 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1922 Elf_Internal_Shdr *shdr,
1923 asection *asect)
1924 {
1925 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1926 shdr->sh_flags |= SHF_EXCLUDE;
1927
1928 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1929 shdr->sh_type = SHT_ORDERED;
1930
1931 return TRUE;
1932 }
1933
1934 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1935 need to bump up the number of section headers. */
1936
1937 static int
1938 ppc_elf_additional_program_headers (bfd *abfd,
1939 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1940 {
1941 asection *s;
1942 int ret = 0;
1943
1944 s = bfd_get_section_by_name (abfd, ".sbss2");
1945 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1946 ++ret;
1947
1948 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1949 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1950 ++ret;
1951
1952 return ret;
1953 }
1954
1955 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1956 .PPC.EMB.sbss0 a normal section, and not a bss section so
1957 that the linker doesn't crater when trying to make more than
1958 2 sections. */
1959
1960 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1961 {
1962 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1963 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1964 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1965 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1966 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1967 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1968 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1969 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1970 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1971 { NULL, 0, 0, 0, 0 }
1972 };
1973
1974 /* This is what we want for new plt/got. */
1975 static struct bfd_elf_special_section ppc_alt_plt =
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1977
1978 static const struct bfd_elf_special_section *
1979 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1980 {
1981 const struct bfd_elf_special_section *ssect;
1982
1983 /* See if this is one of the special sections. */
1984 if (sec->name == NULL)
1985 return NULL;
1986
1987 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1988 sec->use_rela_p);
1989 if (ssect != NULL)
1990 {
1991 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1992 ssect = &ppc_alt_plt;
1993 return ssect;
1994 }
1995
1996 return _bfd_elf_get_sec_type_attr (abfd, sec);
1997 }
1998 \f
1999 /* Very simple linked list structure for recording apuinfo values. */
2000 typedef struct apuinfo_list
2001 {
2002 struct apuinfo_list *next;
2003 unsigned long value;
2004 }
2005 apuinfo_list;
2006
2007 static apuinfo_list *head;
2008
2009
2010 static void
2011 apuinfo_list_init (void)
2012 {
2013 head = NULL;
2014 }
2015
2016 static void
2017 apuinfo_list_add (unsigned long value)
2018 {
2019 apuinfo_list *entry = head;
2020
2021 while (entry != NULL)
2022 {
2023 if (entry->value == value)
2024 return;
2025 entry = entry->next;
2026 }
2027
2028 entry = bfd_malloc (sizeof (* entry));
2029 if (entry == NULL)
2030 return;
2031
2032 entry->value = value;
2033 entry->next = head;
2034 head = entry;
2035 }
2036
2037 static unsigned
2038 apuinfo_list_length (void)
2039 {
2040 apuinfo_list *entry;
2041 unsigned long count;
2042
2043 for (entry = head, count = 0;
2044 entry;
2045 entry = entry->next)
2046 ++ count;
2047
2048 return count;
2049 }
2050
2051 static inline unsigned long
2052 apuinfo_list_element (unsigned long number)
2053 {
2054 apuinfo_list * entry;
2055
2056 for (entry = head;
2057 entry && number --;
2058 entry = entry->next)
2059 ;
2060
2061 return entry ? entry->value : 0;
2062 }
2063
2064 static void
2065 apuinfo_list_finish (void)
2066 {
2067 apuinfo_list *entry;
2068
2069 for (entry = head; entry;)
2070 {
2071 apuinfo_list *next = entry->next;
2072 free (entry);
2073 entry = next;
2074 }
2075
2076 head = NULL;
2077 }
2078
2079 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2080 #define APUINFO_LABEL "APUinfo"
2081
2082 /* Scan the input BFDs and create a linked list of
2083 the APUinfo values that will need to be emitted. */
2084
2085 static void
2086 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2087 {
2088 bfd *ibfd;
2089 asection *asec;
2090 char *buffer;
2091 unsigned num_input_sections;
2092 bfd_size_type output_section_size;
2093 unsigned i;
2094 unsigned num_entries;
2095 unsigned long offset;
2096 unsigned long length;
2097 const char *error_message = NULL;
2098
2099 if (link_info == NULL)
2100 return;
2101
2102 /* Scan the input bfds, looking for apuinfo sections. */
2103 num_input_sections = 0;
2104 output_section_size = 0;
2105
2106 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2107 {
2108 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2109 if (asec)
2110 {
2111 ++ num_input_sections;
2112 output_section_size += asec->size;
2113 }
2114 }
2115
2116 /* We need at least one input sections
2117 in order to make merging worthwhile. */
2118 if (num_input_sections < 1)
2119 return;
2120
2121 /* Just make sure that the output section exists as well. */
2122 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2123 if (asec == NULL)
2124 return;
2125
2126 /* Allocate a buffer for the contents of the input sections. */
2127 buffer = bfd_malloc (output_section_size);
2128 if (buffer == NULL)
2129 return;
2130
2131 offset = 0;
2132 apuinfo_list_init ();
2133
2134 /* Read in the input sections contents. */
2135 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2136 {
2137 unsigned long datum;
2138 char *ptr;
2139
2140 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2141 if (asec == NULL)
2142 continue;
2143
2144 length = asec->size;
2145 if (length < 24)
2146 {
2147 error_message = _("corrupt or empty %s section in %B");
2148 goto fail;
2149 }
2150
2151 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2152 || (bfd_bread (buffer + offset, length, ibfd) != length))
2153 {
2154 error_message = _("unable to read in %s section from %B");
2155 goto fail;
2156 }
2157
2158 /* Process the contents of the section. */
2159 ptr = buffer + offset;
2160 error_message = _("corrupt %s section in %B");
2161
2162 /* Verify the contents of the header. Note - we have to
2163 extract the values this way in order to allow for a
2164 host whose endian-ness is different from the target. */
2165 datum = bfd_get_32 (ibfd, ptr);
2166 if (datum != sizeof APUINFO_LABEL)
2167 goto fail;
2168
2169 datum = bfd_get_32 (ibfd, ptr + 8);
2170 if (datum != 0x2)
2171 goto fail;
2172
2173 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2174 goto fail;
2175
2176 /* Get the number of bytes used for apuinfo entries. */
2177 datum = bfd_get_32 (ibfd, ptr + 4);
2178 if (datum + 20 != length)
2179 goto fail;
2180
2181 /* Make sure that we do not run off the end of the section. */
2182 if (offset + length > output_section_size)
2183 goto fail;
2184
2185 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2186 for (i = 0; i < datum; i += 4)
2187 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2188
2189 /* Update the offset. */
2190 offset += length;
2191 }
2192
2193 error_message = NULL;
2194
2195 /* Compute the size of the output section. */
2196 num_entries = apuinfo_list_length ();
2197 output_section_size = 20 + num_entries * 4;
2198
2199 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2200
2201 if (! bfd_set_section_size (abfd, asec, output_section_size))
2202 ibfd = abfd,
2203 error_message = _("warning: unable to set size of %s section in %B");
2204
2205 fail:
2206 free (buffer);
2207
2208 if (error_message)
2209 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2210 }
2211
2212 /* Prevent the output section from accumulating the input sections'
2213 contents. We have already stored this in our linked list structure. */
2214
2215 static bfd_boolean
2216 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2217 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2218 asection *asec,
2219 bfd_byte *contents ATTRIBUTE_UNUSED)
2220 {
2221 return (apuinfo_list_length ()
2222 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2223 }
2224
2225 /* Finally we can generate the output section. */
2226
2227 static void
2228 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2229 {
2230 bfd_byte *buffer;
2231 asection *asec;
2232 unsigned i;
2233 unsigned num_entries;
2234 bfd_size_type length;
2235
2236 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2237 if (asec == NULL)
2238 return;
2239
2240 if (apuinfo_list_length () == 0)
2241 return;
2242
2243 length = asec->size;
2244 if (length < 20)
2245 return;
2246
2247 buffer = bfd_malloc (length);
2248 if (buffer == NULL)
2249 {
2250 (*_bfd_error_handler)
2251 (_("failed to allocate space for new APUinfo section."));
2252 return;
2253 }
2254
2255 /* Create the apuinfo header. */
2256 num_entries = apuinfo_list_length ();
2257 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2258 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2259 bfd_put_32 (abfd, 0x2, buffer + 8);
2260 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2261
2262 length = 20;
2263 for (i = 0; i < num_entries; i++)
2264 {
2265 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2266 length += 4;
2267 }
2268
2269 if (length != asec->size)
2270 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2271
2272 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2273 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2274
2275 free (buffer);
2276
2277 apuinfo_list_finish ();
2278 }
2279 \f
2280 /* The following functions are specific to the ELF linker, while
2281 functions above are used generally. They appear in this file more
2282 or less in the order in which they are called. eg.
2283 ppc_elf_check_relocs is called early in the link process,
2284 ppc_elf_finish_dynamic_sections is one of the last functions
2285 called. */
2286
2287 /* The PPC linker needs to keep track of the number of relocs that it
2288 decides to copy as dynamic relocs in check_relocs for each symbol.
2289 This is so that it can later discard them if they are found to be
2290 unnecessary. We store the information in a field extending the
2291 regular ELF linker hash table. */
2292
2293 struct ppc_elf_dyn_relocs
2294 {
2295 struct ppc_elf_dyn_relocs *next;
2296
2297 /* The input section of the reloc. */
2298 asection *sec;
2299
2300 /* Total number of relocs copied for the input section. */
2301 bfd_size_type count;
2302
2303 /* Number of pc-relative relocs copied for the input section. */
2304 bfd_size_type pc_count;
2305 };
2306
2307 /* Track PLT entries needed for a given symbol. We might need more
2308 than one glink entry per symbol. */
2309 struct plt_entry
2310 {
2311 struct plt_entry *next;
2312
2313 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2314 This field stores the offset into .got2 used to initialise the
2315 GOT pointer reg. It will always be at least 32768 (and for
2316 current gcc this is the only offset used). */
2317 bfd_vma addend;
2318
2319 /* The .got2 section. */
2320 asection *sec;
2321
2322 /* PLT refcount or offset. */
2323 union
2324 {
2325 bfd_signed_vma refcount;
2326 bfd_vma offset;
2327 } plt;
2328
2329 /* .glink stub offset. */
2330 bfd_vma glink_offset;
2331 };
2332
2333 /* Of those relocs that might be copied as dynamic relocs, this macro
2334 selects those that must be copied when linking a shared library,
2335 even when the symbol is local. */
2336
2337 #define MUST_BE_DYN_RELOC(RTYPE) \
2338 ((RTYPE) != R_PPC_REL24 \
2339 && (RTYPE) != R_PPC_REL14 \
2340 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2341 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2342 && (RTYPE) != R_PPC_REL32)
2343
2344 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2345 copying dynamic variables from a shared lib into an app's dynbss
2346 section, and instead use a dynamic relocation to point into the
2347 shared lib. */
2348 #define ELIMINATE_COPY_RELOCS 1
2349
2350 /* PPC ELF linker hash entry. */
2351
2352 struct ppc_elf_link_hash_entry
2353 {
2354 struct elf_link_hash_entry elf;
2355
2356 /* If this symbol is used in the linker created sections, the processor
2357 specific backend uses this field to map the field into the offset
2358 from the beginning of the section. */
2359 elf_linker_section_pointers_t *linker_section_pointer;
2360
2361 /* Track dynamic relocs copied for this symbol. */
2362 struct ppc_elf_dyn_relocs *dyn_relocs;
2363
2364 /* Contexts in which symbol is used in the GOT (or TOC).
2365 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2366 corresponding relocs are encountered during check_relocs.
2367 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2368 indicate the corresponding GOT entry type is not needed. */
2369 #define TLS_GD 1 /* GD reloc. */
2370 #define TLS_LD 2 /* LD reloc. */
2371 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2372 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2373 #define TLS_TLS 16 /* Any TLS reloc. */
2374 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2375 char tls_mask;
2376
2377 /* Nonzero if we have seen a small data relocation referring to this
2378 symbol. */
2379 unsigned char has_sda_refs;
2380 };
2381
2382 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2383
2384 enum ppc_elf_plt_type {
2385 PLT_UNSET,
2386 PLT_OLD,
2387 PLT_NEW,
2388 PLT_VXWORKS
2389 };
2390
2391 /* PPC ELF linker hash table. */
2392
2393 struct ppc_elf_link_hash_table
2394 {
2395 struct elf_link_hash_table elf;
2396
2397 /* Short-cuts to get to dynamic linker sections. */
2398 asection *got;
2399 asection *relgot;
2400 asection *glink;
2401 asection *plt;
2402 asection *relplt;
2403 asection *dynbss;
2404 asection *relbss;
2405 asection *dynsbss;
2406 asection *relsbss;
2407 elf_linker_section_t sdata[2];
2408 asection *sbss;
2409
2410 /* Shortcut to .__tls_get_addr. */
2411 struct elf_link_hash_entry *tls_get_addr;
2412
2413 /* TLS local dynamic got entry handling. */
2414 union {
2415 bfd_signed_vma refcount;
2416 bfd_vma offset;
2417 } tlsld_got;
2418
2419 /* Offset of PltResolve function in glink. */
2420 bfd_vma glink_pltresolve;
2421
2422 /* Size of reserved GOT entries. */
2423 unsigned int got_header_size;
2424 /* Non-zero if allocating the header left a gap. */
2425 unsigned int got_gap;
2426
2427 /* The type of PLT we have chosen to use. */
2428 enum ppc_elf_plt_type plt_type;
2429
2430 /* Whether we can use the new PLT layout. */
2431 unsigned int can_use_new_plt:1;
2432
2433 /* Set if we should emit symbols for stubs. */
2434 unsigned int emit_stub_syms:1;
2435
2436 /* Small local sym to section mapping cache. */
2437 struct sym_sec_cache sym_sec;
2438
2439 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2440 asection *srelplt2;
2441
2442 /* The .got.plt section (VxWorks only)*/
2443 asection *sgotplt;
2444
2445 /* True if the target system is VxWorks. */
2446 int is_vxworks;
2447
2448 /* The size of PLT entries. */
2449 int plt_entry_size;
2450 /* The distance between adjacent PLT slots. */
2451 int plt_slot_size;
2452 /* The size of the first PLT entry. */
2453 int plt_initial_entry_size;
2454 };
2455
2456 /* Get the PPC ELF linker hash table from a link_info structure. */
2457
2458 #define ppc_elf_hash_table(p) \
2459 ((struct ppc_elf_link_hash_table *) (p)->hash)
2460
2461 /* Create an entry in a PPC ELF linker hash table. */
2462
2463 static struct bfd_hash_entry *
2464 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2465 struct bfd_hash_table *table,
2466 const char *string)
2467 {
2468 /* Allocate the structure if it has not already been allocated by a
2469 subclass. */
2470 if (entry == NULL)
2471 {
2472 entry = bfd_hash_allocate (table,
2473 sizeof (struct ppc_elf_link_hash_entry));
2474 if (entry == NULL)
2475 return entry;
2476 }
2477
2478 /* Call the allocation method of the superclass. */
2479 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2480 if (entry != NULL)
2481 {
2482 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2483 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2484 ppc_elf_hash_entry (entry)->tls_mask = 0;
2485 }
2486
2487 return entry;
2488 }
2489
2490 /* Create a PPC ELF linker hash table. */
2491
2492 static struct bfd_link_hash_table *
2493 ppc_elf_link_hash_table_create (bfd *abfd)
2494 {
2495 struct ppc_elf_link_hash_table *ret;
2496
2497 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2498 if (ret == NULL)
2499 return NULL;
2500
2501 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2502 ppc_elf_link_hash_newfunc,
2503 sizeof (struct ppc_elf_link_hash_entry)))
2504 {
2505 free (ret);
2506 return NULL;
2507 }
2508
2509 ret->elf.init_plt_refcount.refcount = 0;
2510 ret->elf.init_plt_refcount.glist = NULL;
2511 ret->elf.init_plt_offset.offset = 0;
2512 ret->elf.init_plt_offset.glist = NULL;
2513
2514 ret->sdata[0].name = ".sdata";
2515 ret->sdata[0].sym_name = "_SDA_BASE_";
2516 ret->sdata[0].bss_name = ".sbss";
2517
2518 ret->sdata[1].name = ".sdata2";
2519 ret->sdata[1].sym_name = "_SDA2_BASE_";
2520 ret->sdata[1].bss_name = ".sbss2";
2521
2522 ret->plt_entry_size = 12;
2523 ret->plt_slot_size = 8;
2524 ret->plt_initial_entry_size = 72;
2525
2526 ret->is_vxworks = 0;
2527
2528 return &ret->elf.root;
2529 }
2530
2531 /* Create .got and the related sections. */
2532
2533 static bfd_boolean
2534 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2535 {
2536 struct ppc_elf_link_hash_table *htab;
2537 asection *s;
2538 flagword flags;
2539
2540 if (!_bfd_elf_create_got_section (abfd, info))
2541 return FALSE;
2542
2543 htab = ppc_elf_hash_table (info);
2544 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2545 if (s == NULL)
2546 abort ();
2547
2548 if (htab->is_vxworks)
2549 {
2550 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2551 if (!htab->sgotplt)
2552 abort ();
2553 }
2554 else
2555 {
2556 /* The powerpc .got has a blrl instruction in it. Mark it
2557 executable. */
2558 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2559 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2560 if (!bfd_set_section_flags (abfd, s, flags))
2561 return FALSE;
2562 }
2563
2564 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2565 | SEC_LINKER_CREATED | SEC_READONLY);
2566 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2567 if (!htab->relgot
2568 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2569 return FALSE;
2570
2571 return TRUE;
2572 }
2573
2574 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2575 to output sections (just like _bfd_elf_create_dynamic_sections has
2576 to create .dynbss and .rela.bss). */
2577
2578 static bfd_boolean
2579 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2580 {
2581 struct ppc_elf_link_hash_table *htab;
2582 asection *s;
2583 flagword flags;
2584
2585 htab = ppc_elf_hash_table (info);
2586
2587 if (htab->got == NULL
2588 && !ppc_elf_create_got (abfd, info))
2589 return FALSE;
2590
2591 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2592 return FALSE;
2593
2594 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2595 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2596
2597 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2598 htab->glink = s;
2599 if (s == NULL
2600 || !bfd_set_section_alignment (abfd, s, 4))
2601 return FALSE;
2602
2603 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2604 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2605 SEC_ALLOC | SEC_LINKER_CREATED);
2606 htab->dynsbss = s;
2607 if (s == NULL)
2608 return FALSE;
2609
2610 if (! info->shared)
2611 {
2612 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2613 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2614 htab->relsbss = s;
2615 if (s == NULL
2616 || ! bfd_set_section_alignment (abfd, s, 2))
2617 return FALSE;
2618 }
2619
2620 if (htab->is_vxworks
2621 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2622 return FALSE;
2623
2624 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2625 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2626 if (s == NULL)
2627 abort ();
2628
2629 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2630 if (htab->plt_type == PLT_VXWORKS)
2631 /* The VxWorks PLT is a loaded section with contents. */
2632 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2633 return bfd_set_section_flags (abfd, s, flags);
2634 }
2635
2636 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2637
2638 static void
2639 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2640 struct elf_link_hash_entry *dir,
2641 struct elf_link_hash_entry *ind)
2642 {
2643 struct ppc_elf_link_hash_entry *edir, *eind;
2644
2645 edir = (struct ppc_elf_link_hash_entry *) dir;
2646 eind = (struct ppc_elf_link_hash_entry *) ind;
2647
2648 if (eind->dyn_relocs != NULL)
2649 {
2650 if (edir->dyn_relocs != NULL)
2651 {
2652 struct ppc_elf_dyn_relocs **pp;
2653 struct ppc_elf_dyn_relocs *p;
2654
2655 /* Add reloc counts against the indirect sym to the direct sym
2656 list. Merge any entries against the same section. */
2657 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2658 {
2659 struct ppc_elf_dyn_relocs *q;
2660
2661 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2662 if (q->sec == p->sec)
2663 {
2664 q->pc_count += p->pc_count;
2665 q->count += p->count;
2666 *pp = p->next;
2667 break;
2668 }
2669 if (q == NULL)
2670 pp = &p->next;
2671 }
2672 *pp = edir->dyn_relocs;
2673 }
2674
2675 edir->dyn_relocs = eind->dyn_relocs;
2676 eind->dyn_relocs = NULL;
2677 }
2678
2679 edir->tls_mask |= eind->tls_mask;
2680 edir->has_sda_refs |= eind->has_sda_refs;
2681
2682 /* If called to transfer flags for a weakdef during processing
2683 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2684 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2685 if (!(ELIMINATE_COPY_RELOCS
2686 && eind->elf.root.type != bfd_link_hash_indirect
2687 && edir->elf.dynamic_adjusted))
2688 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2689
2690 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2691 edir->elf.ref_regular |= eind->elf.ref_regular;
2692 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2693 edir->elf.needs_plt |= eind->elf.needs_plt;
2694
2695 /* If we were called to copy over info for a weak sym, that's all. */
2696 if (eind->elf.root.type != bfd_link_hash_indirect)
2697 return;
2698
2699 /* Copy over the GOT refcount entries that we may have already seen to
2700 the symbol which just became indirect. */
2701 edir->elf.got.refcount += eind->elf.got.refcount;
2702 eind->elf.got.refcount = 0;
2703
2704 /* And plt entries. */
2705 if (eind->elf.plt.plist != NULL)
2706 {
2707 if (edir->elf.plt.plist != NULL)
2708 {
2709 struct plt_entry **entp;
2710 struct plt_entry *ent;
2711
2712 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2713 {
2714 struct plt_entry *dent;
2715
2716 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2717 if (dent->sec == ent->sec && dent->addend == ent->addend)
2718 {
2719 dent->plt.refcount += ent->plt.refcount;
2720 *entp = ent->next;
2721 break;
2722 }
2723 if (dent == NULL)
2724 entp = &ent->next;
2725 }
2726 *entp = edir->elf.plt.plist;
2727 }
2728
2729 edir->elf.plt.plist = eind->elf.plt.plist;
2730 eind->elf.plt.plist = NULL;
2731 }
2732
2733 if (eind->elf.dynindx != -1)
2734 {
2735 if (edir->elf.dynindx != -1)
2736 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2737 edir->elf.dynstr_index);
2738 edir->elf.dynindx = eind->elf.dynindx;
2739 edir->elf.dynstr_index = eind->elf.dynstr_index;
2740 eind->elf.dynindx = -1;
2741 eind->elf.dynstr_index = 0;
2742 }
2743 }
2744
2745 /* Return 1 if target is one of ours. */
2746
2747 static bfd_boolean
2748 is_ppc_elf_target (const struct bfd_target *targ)
2749 {
2750 extern const bfd_target bfd_elf32_powerpc_vec;
2751 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2752 extern const bfd_target bfd_elf32_powerpcle_vec;
2753
2754 return (targ == &bfd_elf32_powerpc_vec
2755 || targ == &bfd_elf32_powerpc_vxworks_vec
2756 || targ == &bfd_elf32_powerpcle_vec);
2757 }
2758
2759 /* Hook called by the linker routine which adds symbols from an object
2760 file. We use it to put .comm items in .sbss, and not .bss. */
2761
2762 static bfd_boolean
2763 ppc_elf_add_symbol_hook (bfd *abfd,
2764 struct bfd_link_info *info,
2765 Elf_Internal_Sym *sym,
2766 const char **namep ATTRIBUTE_UNUSED,
2767 flagword *flagsp ATTRIBUTE_UNUSED,
2768 asection **secp,
2769 bfd_vma *valp)
2770 {
2771 if (sym->st_shndx == SHN_COMMON
2772 && !info->relocatable
2773 && sym->st_size <= elf_gp_size (abfd)
2774 && is_ppc_elf_target (info->hash->creator))
2775 {
2776 /* Common symbols less than or equal to -G nn bytes are automatically
2777 put into .sbss. */
2778 struct ppc_elf_link_hash_table *htab;
2779
2780 htab = ppc_elf_hash_table (info);
2781 if (htab->sbss == NULL)
2782 {
2783 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2784
2785 if (!htab->elf.dynobj)
2786 htab->elf.dynobj = abfd;
2787
2788 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2789 ".sbss",
2790 flags);
2791 if (htab->sbss == NULL)
2792 return FALSE;
2793 }
2794
2795 *secp = htab->sbss;
2796 *valp = sym->st_size;
2797 }
2798
2799 return TRUE;
2800 }
2801 \f
2802 static bfd_boolean
2803 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2804 elf_linker_section_t *lsect)
2805 {
2806 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2807 TRUE, FALSE, TRUE);
2808 if (lsect->sym == NULL)
2809 return FALSE;
2810 if (lsect->sym->root.type == bfd_link_hash_new)
2811 lsect->sym->non_elf = 0;
2812 lsect->sym->ref_regular = 1;
2813 return TRUE;
2814 }
2815
2816 /* Create a special linker section. */
2817
2818 static bfd_boolean
2819 ppc_elf_create_linker_section (bfd *abfd,
2820 struct bfd_link_info *info,
2821 flagword flags,
2822 elf_linker_section_t *lsect)
2823 {
2824 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2825 asection *s;
2826
2827 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2828 | SEC_LINKER_CREATED);
2829
2830 /* Record the first bfd that needs the special sections. */
2831 if (!htab->elf.dynobj)
2832 htab->elf.dynobj = abfd;
2833
2834 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2835 lsect->name,
2836 flags);
2837 if (s == NULL
2838 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2839 return FALSE;
2840 lsect->section = s;
2841
2842 return create_sdata_sym (htab, lsect);
2843 }
2844
2845 /* Find a linker generated pointer with a given addend and type. */
2846
2847 static elf_linker_section_pointers_t *
2848 elf_find_pointer_linker_section
2849 (elf_linker_section_pointers_t *linker_pointers,
2850 bfd_vma addend,
2851 elf_linker_section_t *lsect)
2852 {
2853 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2854 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2855 return linker_pointers;
2856
2857 return NULL;
2858 }
2859
2860 /* Allocate a pointer to live in a linker created section. */
2861
2862 static bfd_boolean
2863 elf_create_pointer_linker_section (bfd *abfd,
2864 elf_linker_section_t *lsect,
2865 struct elf_link_hash_entry *h,
2866 const Elf_Internal_Rela *rel)
2867 {
2868 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2869 elf_linker_section_pointers_t *linker_section_ptr;
2870 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2871 bfd_size_type amt;
2872
2873 BFD_ASSERT (lsect != NULL);
2874
2875 /* Is this a global symbol? */
2876 if (h != NULL)
2877 {
2878 struct ppc_elf_link_hash_entry *eh;
2879
2880 /* Has this symbol already been allocated? If so, our work is done. */
2881 eh = (struct ppc_elf_link_hash_entry *) h;
2882 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2883 rel->r_addend,
2884 lsect))
2885 return TRUE;
2886
2887 ptr_linker_section_ptr = &eh->linker_section_pointer;
2888 }
2889 else
2890 {
2891 /* Allocation of a pointer to a local symbol. */
2892 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2893
2894 /* Allocate a table to hold the local symbols if first time. */
2895 if (!ptr)
2896 {
2897 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2898
2899 amt = num_symbols;
2900 amt *= sizeof (elf_linker_section_pointers_t *);
2901 ptr = bfd_zalloc (abfd, amt);
2902
2903 if (!ptr)
2904 return FALSE;
2905
2906 elf_local_ptr_offsets (abfd) = ptr;
2907 }
2908
2909 /* Has this symbol already been allocated? If so, our work is done. */
2910 if (elf_find_pointer_linker_section (ptr[r_symndx],
2911 rel->r_addend,
2912 lsect))
2913 return TRUE;
2914
2915 ptr_linker_section_ptr = &ptr[r_symndx];
2916 }
2917
2918 /* Allocate space for a pointer in the linker section, and allocate
2919 a new pointer record from internal memory. */
2920 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2921 amt = sizeof (elf_linker_section_pointers_t);
2922 linker_section_ptr = bfd_alloc (abfd, amt);
2923
2924 if (!linker_section_ptr)
2925 return FALSE;
2926
2927 linker_section_ptr->next = *ptr_linker_section_ptr;
2928 linker_section_ptr->addend = rel->r_addend;
2929 linker_section_ptr->lsect = lsect;
2930 *ptr_linker_section_ptr = linker_section_ptr;
2931
2932 linker_section_ptr->offset = lsect->section->size;
2933 lsect->section->size += 4;
2934
2935 #ifdef DEBUG
2936 fprintf (stderr,
2937 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2938 lsect->name, (long) linker_section_ptr->offset,
2939 (long) lsect->section->size);
2940 #endif
2941
2942 return TRUE;
2943 }
2944
2945 static bfd_boolean
2946 update_local_sym_info (bfd *abfd,
2947 Elf_Internal_Shdr *symtab_hdr,
2948 unsigned long r_symndx,
2949 int tls_type)
2950 {
2951 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2952 char *local_got_tls_masks;
2953
2954 if (local_got_refcounts == NULL)
2955 {
2956 bfd_size_type size = symtab_hdr->sh_info;
2957
2958 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2959 local_got_refcounts = bfd_zalloc (abfd, size);
2960 if (local_got_refcounts == NULL)
2961 return FALSE;
2962 elf_local_got_refcounts (abfd) = local_got_refcounts;
2963 }
2964
2965 local_got_refcounts[r_symndx] += 1;
2966 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2967 local_got_tls_masks[r_symndx] |= tls_type;
2968 return TRUE;
2969 }
2970
2971 static bfd_boolean
2972 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2973 asection *sec, bfd_vma addend)
2974 {
2975 struct plt_entry *ent;
2976
2977 if (addend < 32768)
2978 sec = NULL;
2979 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2980 if (ent->sec == sec && ent->addend == addend)
2981 break;
2982 if (ent == NULL)
2983 {
2984 bfd_size_type amt = sizeof (*ent);
2985 ent = bfd_alloc (abfd, amt);
2986 if (ent == NULL)
2987 return FALSE;
2988 ent->next = h->plt.plist;
2989 ent->sec = sec;
2990 ent->addend = addend;
2991 ent->plt.refcount = 0;
2992 h->plt.plist = ent;
2993 }
2994 ent->plt.refcount += 1;
2995 return TRUE;
2996 }
2997
2998 static struct plt_entry *
2999 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3000 {
3001 struct plt_entry *ent;
3002
3003 if (addend < 32768)
3004 sec = NULL;
3005 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3006 if (ent->sec == sec && ent->addend == addend)
3007 break;
3008 return ent;
3009 }
3010
3011 static void
3012 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3013 {
3014 (*_bfd_error_handler)
3015 (_("%B: relocation %s cannot be used when making a shared object"),
3016 abfd,
3017 ppc_elf_howto_table[r_type]->name);
3018 bfd_set_error (bfd_error_bad_value);
3019 }
3020
3021 /* Look through the relocs for a section during the first phase, and
3022 allocate space in the global offset table or procedure linkage
3023 table. */
3024
3025 static bfd_boolean
3026 ppc_elf_check_relocs (bfd *abfd,
3027 struct bfd_link_info *info,
3028 asection *sec,
3029 const Elf_Internal_Rela *relocs)
3030 {
3031 struct ppc_elf_link_hash_table *htab;
3032 Elf_Internal_Shdr *symtab_hdr;
3033 struct elf_link_hash_entry **sym_hashes;
3034 const Elf_Internal_Rela *rel;
3035 const Elf_Internal_Rela *rel_end;
3036 asection *got2, *sreloc;
3037
3038 if (info->relocatable)
3039 return TRUE;
3040
3041 /* Don't do anything special with non-loaded, non-alloced sections.
3042 In particular, any relocs in such sections should not affect GOT
3043 and PLT reference counting (ie. we don't allow them to create GOT
3044 or PLT entries), there's no possibility or desire to optimize TLS
3045 relocs, and there's not much point in propagating relocs to shared
3046 libs that the dynamic linker won't relocate. */
3047 if ((sec->flags & SEC_ALLOC) == 0)
3048 return TRUE;
3049
3050 #ifdef DEBUG
3051 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3052 sec, abfd);
3053 #endif
3054
3055 /* Initialize howto table if not already done. */
3056 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3057 ppc_elf_howto_init ();
3058
3059 htab = ppc_elf_hash_table (info);
3060 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3061 sym_hashes = elf_sym_hashes (abfd);
3062 got2 = bfd_get_section_by_name (abfd, ".got2");
3063 sreloc = NULL;
3064
3065 rel_end = relocs + sec->reloc_count;
3066 for (rel = relocs; rel < rel_end; rel++)
3067 {
3068 unsigned long r_symndx;
3069 enum elf_ppc_reloc_type r_type;
3070 struct elf_link_hash_entry *h;
3071 int tls_type = 0;
3072
3073 r_symndx = ELF32_R_SYM (rel->r_info);
3074 if (r_symndx < symtab_hdr->sh_info)
3075 h = NULL;
3076 else
3077 {
3078 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3079 while (h->root.type == bfd_link_hash_indirect
3080 || h->root.type == bfd_link_hash_warning)
3081 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3082 }
3083
3084 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3085 This shows up in particular in an R_PPC_ADDR32 in the eabi
3086 startup code. */
3087 if (h != NULL
3088 && htab->got == NULL
3089 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3090 {
3091 if (htab->elf.dynobj == NULL)
3092 htab->elf.dynobj = abfd;
3093 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3094 return FALSE;
3095 BFD_ASSERT (h == htab->elf.hgot);
3096 }
3097
3098 r_type = ELF32_R_TYPE (rel->r_info);
3099 switch (r_type)
3100 {
3101 case R_PPC_GOT_TLSLD16:
3102 case R_PPC_GOT_TLSLD16_LO:
3103 case R_PPC_GOT_TLSLD16_HI:
3104 case R_PPC_GOT_TLSLD16_HA:
3105 htab->tlsld_got.refcount += 1;
3106 tls_type = TLS_TLS | TLS_LD;
3107 goto dogottls;
3108
3109 case R_PPC_GOT_TLSGD16:
3110 case R_PPC_GOT_TLSGD16_LO:
3111 case R_PPC_GOT_TLSGD16_HI:
3112 case R_PPC_GOT_TLSGD16_HA:
3113 tls_type = TLS_TLS | TLS_GD;
3114 goto dogottls;
3115
3116 case R_PPC_GOT_TPREL16:
3117 case R_PPC_GOT_TPREL16_LO:
3118 case R_PPC_GOT_TPREL16_HI:
3119 case R_PPC_GOT_TPREL16_HA:
3120 if (info->shared)
3121 info->flags |= DF_STATIC_TLS;
3122 tls_type = TLS_TLS | TLS_TPREL;
3123 goto dogottls;
3124
3125 case R_PPC_GOT_DTPREL16:
3126 case R_PPC_GOT_DTPREL16_LO:
3127 case R_PPC_GOT_DTPREL16_HI:
3128 case R_PPC_GOT_DTPREL16_HA:
3129 tls_type = TLS_TLS | TLS_DTPREL;
3130 dogottls:
3131 sec->has_tls_reloc = 1;
3132 /* Fall thru */
3133
3134 /* GOT16 relocations */
3135 case R_PPC_GOT16:
3136 case R_PPC_GOT16_LO:
3137 case R_PPC_GOT16_HI:
3138 case R_PPC_GOT16_HA:
3139 /* This symbol requires a global offset table entry. */
3140 if (htab->got == NULL)
3141 {
3142 if (htab->elf.dynobj == NULL)
3143 htab->elf.dynobj = abfd;
3144 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3145 return FALSE;
3146 }
3147 if (h != NULL)
3148 {
3149 h->got.refcount += 1;
3150 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3151 }
3152 else
3153 /* This is a global offset table entry for a local symbol. */
3154 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3155 return FALSE;
3156 break;
3157
3158 /* Indirect .sdata relocation. */
3159 case R_PPC_EMB_SDAI16:
3160 if (info->shared)
3161 {
3162 bad_shared_reloc (abfd, r_type);
3163 return FALSE;
3164 }
3165 if (htab->sdata[0].section == NULL
3166 && !ppc_elf_create_linker_section (abfd, info, 0,
3167 &htab->sdata[0]))
3168 return FALSE;
3169 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3170 h, rel))
3171 return FALSE;
3172 if (h != NULL)
3173 {
3174 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3175 h->non_got_ref = TRUE;
3176 }
3177 break;
3178
3179 /* Indirect .sdata2 relocation. */
3180 case R_PPC_EMB_SDA2I16:
3181 if (info->shared)
3182 {
3183 bad_shared_reloc (abfd, r_type);
3184 return FALSE;
3185 }
3186 if (htab->sdata[1].section == NULL
3187 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3188 &htab->sdata[1]))
3189 return FALSE;
3190 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3191 h, rel))
3192 return FALSE;
3193 if (h != NULL)
3194 {
3195 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3196 h->non_got_ref = TRUE;
3197 }
3198 break;
3199
3200 case R_PPC_SDAREL16:
3201 if (info->shared)
3202 {
3203 bad_shared_reloc (abfd, r_type);
3204 return FALSE;
3205 }
3206 if (htab->sdata[0].sym == NULL
3207 && !create_sdata_sym (htab, &htab->sdata[0]))
3208 return FALSE;
3209 if (h != NULL)
3210 {
3211 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3212 h->non_got_ref = TRUE;
3213 }
3214 break;
3215
3216 case R_PPC_EMB_SDA2REL:
3217 if (info->shared)
3218 {
3219 bad_shared_reloc (abfd, r_type);
3220 return FALSE;
3221 }
3222 if (htab->sdata[1].sym == NULL
3223 && !create_sdata_sym (htab, &htab->sdata[1]))
3224 return FALSE;
3225 if (h != NULL)
3226 {
3227 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3228 h->non_got_ref = TRUE;
3229 }
3230 break;
3231
3232 case R_PPC_EMB_SDA21:
3233 case R_PPC_EMB_RELSDA:
3234 if (info->shared)
3235 {
3236 bad_shared_reloc (abfd, r_type);
3237 return FALSE;
3238 }
3239 if (htab->sdata[0].sym == NULL
3240 && !create_sdata_sym (htab, &htab->sdata[0]))
3241 return FALSE;
3242 if (htab->sdata[1].sym == NULL
3243 && !create_sdata_sym (htab, &htab->sdata[1]))
3244 return FALSE;
3245 if (h != NULL)
3246 {
3247 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3248 h->non_got_ref = TRUE;
3249 }
3250 break;
3251
3252 case R_PPC_EMB_NADDR32:
3253 case R_PPC_EMB_NADDR16:
3254 case R_PPC_EMB_NADDR16_LO:
3255 case R_PPC_EMB_NADDR16_HI:
3256 case R_PPC_EMB_NADDR16_HA:
3257 if (info->shared)
3258 {
3259 bad_shared_reloc (abfd, r_type);
3260 return FALSE;
3261 }
3262 if (h != NULL)
3263 h->non_got_ref = TRUE;
3264 break;
3265
3266 case R_PPC_PLT32:
3267 case R_PPC_PLTREL24:
3268 case R_PPC_PLTREL32:
3269 case R_PPC_PLT16_LO:
3270 case R_PPC_PLT16_HI:
3271 case R_PPC_PLT16_HA:
3272 #ifdef DEBUG
3273 fprintf (stderr, "Reloc requires a PLT entry\n");
3274 #endif
3275 /* This symbol requires a procedure linkage table entry. We
3276 actually build the entry in finish_dynamic_symbol,
3277 because this might be a case of linking PIC code without
3278 linking in any dynamic objects, in which case we don't
3279 need to generate a procedure linkage table after all. */
3280
3281 if (h == NULL)
3282 {
3283 /* It does not make sense to have a procedure linkage
3284 table entry for a local symbol. */
3285 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3286 "local symbol"),
3287 abfd,
3288 sec,
3289 (long) rel->r_offset,
3290 ppc_elf_howto_table[r_type]->name);
3291 bfd_set_error (bfd_error_bad_value);
3292 return FALSE;
3293 }
3294 else
3295 {
3296 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3297
3298 h->needs_plt = 1;
3299 if (!update_plt_info (abfd, h, got2, addend))
3300 return FALSE;
3301 }
3302 break;
3303
3304 /* The following relocations don't need to propagate the
3305 relocation if linking a shared object since they are
3306 section relative. */
3307 case R_PPC_SECTOFF:
3308 case R_PPC_SECTOFF_LO:
3309 case R_PPC_SECTOFF_HI:
3310 case R_PPC_SECTOFF_HA:
3311 case R_PPC_DTPREL16:
3312 case R_PPC_DTPREL16_LO:
3313 case R_PPC_DTPREL16_HI:
3314 case R_PPC_DTPREL16_HA:
3315 case R_PPC_TOC16:
3316 break;
3317
3318 case R_PPC_REL16:
3319 case R_PPC_REL16_LO:
3320 case R_PPC_REL16_HI:
3321 case R_PPC_REL16_HA:
3322 htab->can_use_new_plt = 1;
3323 break;
3324
3325 /* These are just markers. */
3326 case R_PPC_TLS:
3327 case R_PPC_EMB_MRKREF:
3328 case R_PPC_NONE:
3329 case R_PPC_max:
3330 break;
3331
3332 /* These should only appear in dynamic objects. */
3333 case R_PPC_COPY:
3334 case R_PPC_GLOB_DAT:
3335 case R_PPC_JMP_SLOT:
3336 case R_PPC_RELATIVE:
3337 break;
3338
3339 /* These aren't handled yet. We'll report an error later. */
3340 case R_PPC_ADDR30:
3341 case R_PPC_EMB_RELSEC16:
3342 case R_PPC_EMB_RELST_LO:
3343 case R_PPC_EMB_RELST_HI:
3344 case R_PPC_EMB_RELST_HA:
3345 case R_PPC_EMB_BIT_FLD:
3346 break;
3347
3348 /* This refers only to functions defined in the shared library. */
3349 case R_PPC_LOCAL24PC:
3350 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351 htab->plt_type = PLT_OLD;
3352 break;
3353
3354 /* This relocation describes the C++ object vtable hierarchy.
3355 Reconstruct it for later use during GC. */
3356 case R_PPC_GNU_VTINHERIT:
3357 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3358 return FALSE;
3359 break;
3360
3361 /* This relocation describes which C++ vtable entries are actually
3362 used. Record for later use during GC. */
3363 case R_PPC_GNU_VTENTRY:
3364 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3365 return FALSE;
3366 break;
3367
3368 /* We shouldn't really be seeing these. */
3369 case R_PPC_TPREL32:
3370 if (info->shared)
3371 info->flags |= DF_STATIC_TLS;
3372 goto dodyn;
3373
3374 /* Nor these. */
3375 case R_PPC_DTPMOD32:
3376 case R_PPC_DTPREL32:
3377 goto dodyn;
3378
3379 case R_PPC_TPREL16:
3380 case R_PPC_TPREL16_LO:
3381 case R_PPC_TPREL16_HI:
3382 case R_PPC_TPREL16_HA:
3383 if (info->shared)
3384 info->flags |= DF_STATIC_TLS;
3385 goto dodyn;
3386
3387 case R_PPC_REL32:
3388 if (h == NULL
3389 && got2 != NULL
3390 && (sec->flags & SEC_CODE) != 0
3391 && (info->shared || info->pie)
3392 && htab->plt_type == PLT_UNSET)
3393 {
3394 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3395 the start of a function, which assembles to a REL32
3396 reference to .got2. If we detect one of these, then
3397 force the old PLT layout because the linker cannot
3398 reliably deduce the GOT pointer value needed for
3399 PLT call stubs. */
3400 asection *s;
3401
3402 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3403 r_symndx);
3404 if (s == got2)
3405 htab->plt_type = PLT_OLD;
3406 }
3407 if (h == NULL || h == htab->elf.hgot)
3408 break;
3409 goto dodyn1;
3410
3411 case R_PPC_REL24:
3412 case R_PPC_REL14:
3413 case R_PPC_REL14_BRTAKEN:
3414 case R_PPC_REL14_BRNTAKEN:
3415 if (h == NULL)
3416 break;
3417 if (h == htab->elf.hgot)
3418 {
3419 if (htab->plt_type == PLT_UNSET)
3420 htab->plt_type = PLT_OLD;
3421 break;
3422 }
3423 /* fall through */
3424
3425 case R_PPC_ADDR32:
3426 case R_PPC_ADDR24:
3427 case R_PPC_ADDR16:
3428 case R_PPC_ADDR16_LO:
3429 case R_PPC_ADDR16_HI:
3430 case R_PPC_ADDR16_HA:
3431 case R_PPC_ADDR14:
3432 case R_PPC_ADDR14_BRTAKEN:
3433 case R_PPC_ADDR14_BRNTAKEN:
3434 case R_PPC_UADDR32:
3435 case R_PPC_UADDR16:
3436 dodyn1:
3437 if (h != NULL && !info->shared)
3438 {
3439 /* We may need a plt entry if the symbol turns out to be
3440 a function defined in a dynamic object. */
3441 if (!update_plt_info (abfd, h, NULL, 0))
3442 return FALSE;
3443
3444 /* We may need a copy reloc too. */
3445 h->non_got_ref = 1;
3446 }
3447
3448 dodyn:
3449 /* If we are creating a shared library, and this is a reloc
3450 against a global symbol, or a non PC relative reloc
3451 against a local symbol, then we need to copy the reloc
3452 into the shared library. However, if we are linking with
3453 -Bsymbolic, we do not need to copy a reloc against a
3454 global symbol which is defined in an object we are
3455 including in the link (i.e., DEF_REGULAR is set). At
3456 this point we have not seen all the input files, so it is
3457 possible that DEF_REGULAR is not set now but will be set
3458 later (it is never cleared). In case of a weak definition,
3459 DEF_REGULAR may be cleared later by a strong definition in
3460 a shared library. We account for that possibility below by
3461 storing information in the dyn_relocs field of the hash
3462 table entry. A similar situation occurs when creating
3463 shared libraries and symbol visibility changes render the
3464 symbol local.
3465
3466 If on the other hand, we are creating an executable, we
3467 may need to keep relocations for symbols satisfied by a
3468 dynamic library if we manage to avoid copy relocs for the
3469 symbol. */
3470 if ((info->shared
3471 && (MUST_BE_DYN_RELOC (r_type)
3472 || (h != NULL
3473 && (! info->symbolic
3474 || h->root.type == bfd_link_hash_defweak
3475 || !h->def_regular))))
3476 || (ELIMINATE_COPY_RELOCS
3477 && !info->shared
3478 && h != NULL
3479 && (h->root.type == bfd_link_hash_defweak
3480 || !h->def_regular)))
3481 {
3482 struct ppc_elf_dyn_relocs *p;
3483 struct ppc_elf_dyn_relocs **head;
3484
3485 #ifdef DEBUG
3486 fprintf (stderr,
3487 "ppc_elf_check_relocs needs to "
3488 "create relocation for %s\n",
3489 (h && h->root.root.string
3490 ? h->root.root.string : "<unknown>"));
3491 #endif
3492 if (sreloc == NULL)
3493 {
3494 const char *name;
3495
3496 name = (bfd_elf_string_from_elf_section
3497 (abfd,
3498 elf_elfheader (abfd)->e_shstrndx,
3499 elf_section_data (sec)->rel_hdr.sh_name));
3500 if (name == NULL)
3501 return FALSE;
3502
3503 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3504 && strcmp (bfd_get_section_name (abfd, sec),
3505 name + 5) == 0);
3506
3507 if (htab->elf.dynobj == NULL)
3508 htab->elf.dynobj = abfd;
3509 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3510 if (sreloc == NULL)
3511 {
3512 flagword flags;
3513
3514 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3516 | SEC_ALLOC | SEC_LOAD);
3517 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3518 name,
3519 flags);
3520 if (sreloc == NULL
3521 || ! bfd_set_section_alignment (htab->elf.dynobj,
3522 sreloc, 2))
3523 return FALSE;
3524 }
3525 elf_section_data (sec)->sreloc = sreloc;
3526 }
3527
3528 /* If this is a global symbol, we count the number of
3529 relocations we need for this symbol. */
3530 if (h != NULL)
3531 {
3532 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3533 }
3534 else
3535 {
3536 /* Track dynamic relocs needed for local syms too.
3537 We really need local syms available to do this
3538 easily. Oh well. */
3539
3540 asection *s;
3541 void *vpp;
3542
3543 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3544 sec, r_symndx);
3545 if (s == NULL)
3546 return FALSE;
3547
3548 vpp = &elf_section_data (s)->local_dynrel;
3549 head = (struct ppc_elf_dyn_relocs **) vpp;
3550 }
3551
3552 p = *head;
3553 if (p == NULL || p->sec != sec)
3554 {
3555 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3556 if (p == NULL)
3557 return FALSE;
3558 p->next = *head;
3559 *head = p;
3560 p->sec = sec;
3561 p->count = 0;
3562 p->pc_count = 0;
3563 }
3564
3565 p->count += 1;
3566 if (!MUST_BE_DYN_RELOC (r_type))
3567 p->pc_count += 1;
3568 }
3569
3570 break;
3571 }
3572 }
3573
3574 return TRUE;
3575 }
3576 \f
3577 /* Merge backend specific data from an object file to the output
3578 object file when linking. */
3579
3580 static bfd_boolean
3581 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3582 {
3583 flagword old_flags;
3584 flagword new_flags;
3585 bfd_boolean error;
3586
3587 if (!is_ppc_elf_target (ibfd->xvec)
3588 || !is_ppc_elf_target (obfd->xvec))
3589 return TRUE;
3590
3591 /* Check if we have the same endianess. */
3592 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3593 return FALSE;
3594
3595 new_flags = elf_elfheader (ibfd)->e_flags;
3596 old_flags = elf_elfheader (obfd)->e_flags;
3597 if (!elf_flags_init (obfd))
3598 {
3599 /* First call, no flags set. */
3600 elf_flags_init (obfd) = TRUE;
3601 elf_elfheader (obfd)->e_flags = new_flags;
3602 }
3603
3604 /* Compatible flags are ok. */
3605 else if (new_flags == old_flags)
3606 ;
3607
3608 /* Incompatible flags. */
3609 else
3610 {
3611 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3612 to be linked with either. */
3613 error = FALSE;
3614 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3615 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3616 {
3617 error = TRUE;
3618 (*_bfd_error_handler)
3619 (_("%B: compiled with -mrelocatable and linked with "
3620 "modules compiled normally"), ibfd);
3621 }
3622 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3623 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3624 {
3625 error = TRUE;
3626 (*_bfd_error_handler)
3627 (_("%B: compiled normally and linked with "
3628 "modules compiled with -mrelocatable"), ibfd);
3629 }
3630
3631 /* The output is -mrelocatable-lib iff both the input files are. */
3632 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3633 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3634
3635 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3636 but each input file is either -mrelocatable or -mrelocatable-lib. */
3637 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3638 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3639 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3640 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3641
3642 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3643 any module uses it. */
3644 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3645
3646 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3647 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3648
3649 /* Warn about any other mismatches. */
3650 if (new_flags != old_flags)
3651 {
3652 error = TRUE;
3653 (*_bfd_error_handler)
3654 (_("%B: uses different e_flags (0x%lx) fields "
3655 "than previous modules (0x%lx)"),
3656 ibfd, (long) new_flags, (long) old_flags);
3657 }
3658
3659 if (error)
3660 {
3661 bfd_set_error (bfd_error_bad_value);
3662 return FALSE;
3663 }
3664 }
3665
3666 return TRUE;
3667 }
3668 \f
3669 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3670 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3671 int
3672 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3673 struct bfd_link_info *info,
3674 int force_old_plt,
3675 int emit_stub_syms)
3676 {
3677 struct ppc_elf_link_hash_table *htab;
3678 flagword flags;
3679
3680 htab = ppc_elf_hash_table (info);
3681
3682 if (htab->plt_type == PLT_UNSET)
3683 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3684 ? PLT_OLD : PLT_NEW);
3685
3686 htab->emit_stub_syms = emit_stub_syms;
3687
3688 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3689
3690 if (htab->plt_type == PLT_NEW)
3691 {
3692 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3693 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3694
3695 /* The new PLT is a loaded section. */
3696 if (htab->plt != NULL
3697 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3698 return -1;
3699
3700 /* The new GOT is not executable. */
3701 if (htab->got != NULL
3702 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3703 return -1;
3704 }
3705 else
3706 {
3707 /* Stop an unused .glink section from affecting .text alignment. */
3708 if (htab->glink != NULL
3709 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3710 return -1;
3711 }
3712 return htab->plt_type == PLT_NEW;
3713 }
3714 \f
3715 /* Return the section that should be marked against GC for a given
3716 relocation. */
3717
3718 static asection *
3719 ppc_elf_gc_mark_hook (asection *sec,
3720 struct bfd_link_info *info,
3721 Elf_Internal_Rela *rel,
3722 struct elf_link_hash_entry *h,
3723 Elf_Internal_Sym *sym)
3724 {
3725 if (h != NULL)
3726 switch (ELF32_R_TYPE (rel->r_info))
3727 {
3728 case R_PPC_GNU_VTINHERIT:
3729 case R_PPC_GNU_VTENTRY:
3730 return NULL;
3731 }
3732
3733 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3734 }
3735
3736 /* Update the got, plt and dynamic reloc reference counts for the
3737 section being removed. */
3738
3739 static bfd_boolean
3740 ppc_elf_gc_sweep_hook (bfd *abfd,
3741 struct bfd_link_info *info,
3742 asection *sec,
3743 const Elf_Internal_Rela *relocs)
3744 {
3745 struct ppc_elf_link_hash_table *htab;
3746 Elf_Internal_Shdr *symtab_hdr;
3747 struct elf_link_hash_entry **sym_hashes;
3748 bfd_signed_vma *local_got_refcounts;
3749 const Elf_Internal_Rela *rel, *relend;
3750 asection *got2;
3751
3752 if ((sec->flags & SEC_ALLOC) == 0)
3753 return TRUE;
3754
3755 elf_section_data (sec)->local_dynrel = NULL;
3756
3757 htab = ppc_elf_hash_table (info);
3758 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3759 sym_hashes = elf_sym_hashes (abfd);
3760 local_got_refcounts = elf_local_got_refcounts (abfd);
3761 got2 = bfd_get_section_by_name (abfd, ".got2");
3762
3763 relend = relocs + sec->reloc_count;
3764 for (rel = relocs; rel < relend; rel++)
3765 {
3766 unsigned long r_symndx;
3767 enum elf_ppc_reloc_type r_type;
3768 struct elf_link_hash_entry *h = NULL;
3769
3770 r_symndx = ELF32_R_SYM (rel->r_info);
3771 if (r_symndx >= symtab_hdr->sh_info)
3772 {
3773 struct ppc_elf_dyn_relocs **pp, *p;
3774 struct ppc_elf_link_hash_entry *eh;
3775
3776 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3777 while (h->root.type == bfd_link_hash_indirect
3778 || h->root.type == bfd_link_hash_warning)
3779 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3780 eh = (struct ppc_elf_link_hash_entry *) h;
3781
3782 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3783 if (p->sec == sec)
3784 {
3785 /* Everything must go for SEC. */
3786 *pp = p->next;
3787 break;
3788 }
3789 }
3790
3791 r_type = ELF32_R_TYPE (rel->r_info);
3792 switch (r_type)
3793 {
3794 case R_PPC_GOT_TLSLD16:
3795 case R_PPC_GOT_TLSLD16_LO:
3796 case R_PPC_GOT_TLSLD16_HI:
3797 case R_PPC_GOT_TLSLD16_HA:
3798 htab->tlsld_got.refcount -= 1;
3799 /* Fall thru */
3800
3801 case R_PPC_GOT_TLSGD16:
3802 case R_PPC_GOT_TLSGD16_LO:
3803 case R_PPC_GOT_TLSGD16_HI:
3804 case R_PPC_GOT_TLSGD16_HA:
3805 case R_PPC_GOT_TPREL16:
3806 case R_PPC_GOT_TPREL16_LO:
3807 case R_PPC_GOT_TPREL16_HI:
3808 case R_PPC_GOT_TPREL16_HA:
3809 case R_PPC_GOT_DTPREL16:
3810 case R_PPC_GOT_DTPREL16_LO:
3811 case R_PPC_GOT_DTPREL16_HI:
3812 case R_PPC_GOT_DTPREL16_HA:
3813 case R_PPC_GOT16:
3814 case R_PPC_GOT16_LO:
3815 case R_PPC_GOT16_HI:
3816 case R_PPC_GOT16_HA:
3817 if (h != NULL)
3818 {
3819 if (h->got.refcount > 0)
3820 h->got.refcount--;
3821 }
3822 else if (local_got_refcounts != NULL)
3823 {
3824 if (local_got_refcounts[r_symndx] > 0)
3825 local_got_refcounts[r_symndx]--;
3826 }
3827 break;
3828
3829 case R_PPC_REL24:
3830 case R_PPC_REL14:
3831 case R_PPC_REL14_BRTAKEN:
3832 case R_PPC_REL14_BRNTAKEN:
3833 case R_PPC_REL32:
3834 if (h == NULL || h == htab->elf.hgot)
3835 break;
3836 /* Fall thru */
3837
3838 case R_PPC_ADDR32:
3839 case R_PPC_ADDR24:
3840 case R_PPC_ADDR16:
3841 case R_PPC_ADDR16_LO:
3842 case R_PPC_ADDR16_HI:
3843 case R_PPC_ADDR16_HA:
3844 case R_PPC_ADDR14:
3845 case R_PPC_ADDR14_BRTAKEN:
3846 case R_PPC_ADDR14_BRNTAKEN:
3847 case R_PPC_UADDR32:
3848 case R_PPC_UADDR16:
3849 if (info->shared)
3850 break;
3851
3852 case R_PPC_PLT32:
3853 case R_PPC_PLTREL24:
3854 case R_PPC_PLTREL32:
3855 case R_PPC_PLT16_LO:
3856 case R_PPC_PLT16_HI:
3857 case R_PPC_PLT16_HA:
3858 if (h != NULL)
3859 {
3860 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3861 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3862 if (ent->plt.refcount > 0)
3863 ent->plt.refcount -= 1;
3864 }
3865 break;
3866
3867 default:
3868 break;
3869 }
3870 }
3871 return TRUE;
3872 }
3873 \f
3874 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3875
3876 asection *
3877 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3878 {
3879 struct ppc_elf_link_hash_table *htab;
3880
3881 htab = ppc_elf_hash_table (info);
3882 if (htab->plt_type == PLT_NEW
3883 && htab->plt != NULL
3884 && htab->plt->output_section != NULL)
3885 {
3886 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3887 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3888 }
3889
3890 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3891 FALSE, FALSE, TRUE);
3892 return _bfd_elf_tls_setup (obfd, info);
3893 }
3894
3895 /* Run through all the TLS relocs looking for optimization
3896 opportunities. */
3897
3898 bfd_boolean
3899 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3900 struct bfd_link_info *info)
3901 {
3902 bfd *ibfd;
3903 asection *sec;
3904 struct ppc_elf_link_hash_table *htab;
3905
3906 if (info->relocatable || info->shared)
3907 return TRUE;
3908
3909 htab = ppc_elf_hash_table (info);
3910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3911 {
3912 Elf_Internal_Sym *locsyms = NULL;
3913 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3914
3915 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3916 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3917 {
3918 Elf_Internal_Rela *relstart, *rel, *relend;
3919 int expecting_tls_get_addr;
3920
3921 /* Read the relocations. */
3922 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3923 info->keep_memory);
3924 if (relstart == NULL)
3925 return FALSE;
3926
3927 expecting_tls_get_addr = 0;
3928 relend = relstart + sec->reloc_count;
3929 for (rel = relstart; rel < relend; rel++)
3930 {
3931 enum elf_ppc_reloc_type r_type;
3932 unsigned long r_symndx;
3933 struct elf_link_hash_entry *h = NULL;
3934 char *tls_mask;
3935 char tls_set, tls_clear;
3936 bfd_boolean is_local;
3937
3938 r_symndx = ELF32_R_SYM (rel->r_info);
3939 if (r_symndx >= symtab_hdr->sh_info)
3940 {
3941 struct elf_link_hash_entry **sym_hashes;
3942
3943 sym_hashes = elf_sym_hashes (ibfd);
3944 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3945 while (h->root.type == bfd_link_hash_indirect
3946 || h->root.type == bfd_link_hash_warning)
3947 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3948 }
3949
3950 is_local = FALSE;
3951 if (h == NULL
3952 || !h->def_dynamic)
3953 is_local = TRUE;
3954
3955 r_type = ELF32_R_TYPE (rel->r_info);
3956 switch (r_type)
3957 {
3958 case R_PPC_GOT_TLSLD16:
3959 case R_PPC_GOT_TLSLD16_LO:
3960 case R_PPC_GOT_TLSLD16_HI:
3961 case R_PPC_GOT_TLSLD16_HA:
3962 /* These relocs should never be against a symbol
3963 defined in a shared lib. Leave them alone if
3964 that turns out to be the case. */
3965 expecting_tls_get_addr = 0;
3966 htab->tlsld_got.refcount -= 1;
3967 if (!is_local)
3968 continue;
3969
3970 /* LD -> LE */
3971 tls_set = 0;
3972 tls_clear = TLS_LD;
3973 expecting_tls_get_addr = 1;
3974 break;
3975
3976 case R_PPC_GOT_TLSGD16:
3977 case R_PPC_GOT_TLSGD16_LO:
3978 case R_PPC_GOT_TLSGD16_HI:
3979 case R_PPC_GOT_TLSGD16_HA:
3980 if (is_local)
3981 /* GD -> LE */
3982 tls_set = 0;
3983 else
3984 /* GD -> IE */
3985 tls_set = TLS_TLS | TLS_TPRELGD;
3986 tls_clear = TLS_GD;
3987 expecting_tls_get_addr = 1;
3988 break;
3989
3990 case R_PPC_GOT_TPREL16:
3991 case R_PPC_GOT_TPREL16_LO:
3992 case R_PPC_GOT_TPREL16_HI:
3993 case R_PPC_GOT_TPREL16_HA:
3994 expecting_tls_get_addr = 0;
3995 if (is_local)
3996 {
3997 /* IE -> LE */
3998 tls_set = 0;
3999 tls_clear = TLS_TPREL;
4000 break;
4001 }
4002 else
4003 continue;
4004
4005 case R_PPC_REL14:
4006 case R_PPC_REL14_BRTAKEN:
4007 case R_PPC_REL14_BRNTAKEN:
4008 case R_PPC_REL24:
4009 if (expecting_tls_get_addr
4010 && h != NULL
4011 && h == htab->tls_get_addr)
4012 {
4013 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
4014 if (ent != NULL && ent->plt.refcount > 0)
4015 ent->plt.refcount -= 1;
4016 }
4017 expecting_tls_get_addr = 0;
4018 continue;
4019
4020 default:
4021 expecting_tls_get_addr = 0;
4022 continue;
4023 }
4024
4025 if (h != NULL)
4026 {
4027 if (tls_set == 0)
4028 {
4029 /* We managed to get rid of a got entry. */
4030 if (h->got.refcount > 0)
4031 h->got.refcount -= 1;
4032 }
4033 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4034 }
4035 else
4036 {
4037 Elf_Internal_Sym *sym;
4038 bfd_signed_vma *lgot_refs;
4039 char *lgot_masks;
4040
4041 if (locsyms == NULL)
4042 {
4043 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4044 if (locsyms == NULL)
4045 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4046 symtab_hdr->sh_info,
4047 0, NULL, NULL, NULL);
4048 if (locsyms == NULL)
4049 {
4050 if (elf_section_data (sec)->relocs != relstart)
4051 free (relstart);
4052 return FALSE;
4053 }
4054 }
4055 sym = locsyms + r_symndx;
4056 lgot_refs = elf_local_got_refcounts (ibfd);
4057 if (lgot_refs == NULL)
4058 abort ();
4059 if (tls_set == 0)
4060 {
4061 /* We managed to get rid of a got entry. */
4062 if (lgot_refs[r_symndx] > 0)
4063 lgot_refs[r_symndx] -= 1;
4064 }
4065 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4066 tls_mask = &lgot_masks[r_symndx];
4067 }
4068
4069 *tls_mask |= tls_set;
4070 *tls_mask &= ~tls_clear;
4071 }
4072
4073 if (elf_section_data (sec)->relocs != relstart)
4074 free (relstart);
4075 }
4076
4077 if (locsyms != NULL
4078 && (symtab_hdr->contents != (unsigned char *) locsyms))
4079 {
4080 if (!info->keep_memory)
4081 free (locsyms);
4082 else
4083 symtab_hdr->contents = (unsigned char *) locsyms;
4084 }
4085 }
4086 return TRUE;
4087 }
4088 \f
4089 /* Adjust a symbol defined by a dynamic object and referenced by a
4090 regular object. The current definition is in some section of the
4091 dynamic object, but we're not including those sections. We have to
4092 change the definition to something the rest of the link can
4093 understand. */
4094
4095 static bfd_boolean
4096 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4097 struct elf_link_hash_entry *h)
4098 {
4099 struct ppc_elf_link_hash_table *htab;
4100 asection *s;
4101 unsigned int power_of_two;
4102
4103 #ifdef DEBUG
4104 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4105 h->root.root.string);
4106 #endif
4107
4108 /* Make sure we know what is going on here. */
4109 htab = ppc_elf_hash_table (info);
4110 BFD_ASSERT (htab->elf.dynobj != NULL
4111 && (h->needs_plt
4112 || h->u.weakdef != NULL
4113 || (h->def_dynamic
4114 && h->ref_regular
4115 && !h->def_regular)));
4116
4117 /* Deal with function syms. */
4118 if (h->type == STT_FUNC
4119 || h->needs_plt)
4120 {
4121 /* Clear procedure linkage table information for any symbol that
4122 won't need a .plt entry. */
4123 struct plt_entry *ent;
4124 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4125 if (ent->plt.refcount > 0)
4126 break;
4127 if (ent == NULL
4128 || SYMBOL_CALLS_LOCAL (info, h)
4129 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4130 && h->root.type == bfd_link_hash_undefweak))
4131 {
4132 /* A PLT entry is not required/allowed when:
4133
4134 1. We are not using ld.so; because then the PLT entry
4135 can't be set up, so we can't use one. In this case,
4136 ppc_elf_adjust_dynamic_symbol won't even be called.
4137
4138 2. GC has rendered the entry unused.
4139
4140 3. We know for certain that a call to this symbol
4141 will go to this object, or will remain undefined. */
4142 h->plt.plist = NULL;
4143 h->needs_plt = 0;
4144 }
4145 return TRUE;
4146 }
4147 else
4148 h->plt.plist = NULL;
4149
4150 /* If this is a weak symbol, and there is a real definition, the
4151 processor independent code will have arranged for us to see the
4152 real definition first, and we can just use the same value. */
4153 if (h->u.weakdef != NULL)
4154 {
4155 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4156 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4157 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4158 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4159 if (ELIMINATE_COPY_RELOCS)
4160 h->non_got_ref = h->u.weakdef->non_got_ref;
4161 return TRUE;
4162 }
4163
4164 /* This is a reference to a symbol defined by a dynamic object which
4165 is not a function. */
4166
4167 /* If we are creating a shared library, we must presume that the
4168 only references to the symbol are via the global offset table.
4169 For such cases we need not do anything here; the relocations will
4170 be handled correctly by relocate_section. */
4171 if (info->shared)
4172 return TRUE;
4173
4174 /* If there are no references to this symbol that do not use the
4175 GOT, we don't need to generate a copy reloc. */
4176 if (!h->non_got_ref)
4177 return TRUE;
4178
4179 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4180 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4181 do this if there are any small data relocations. */
4182 if (ELIMINATE_COPY_RELOCS
4183 && !ppc_elf_hash_entry (h)->has_sda_refs)
4184 {
4185 struct ppc_elf_dyn_relocs *p;
4186 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4187 {
4188 s = p->sec->output_section;
4189 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4190 break;
4191 }
4192
4193 if (p == NULL)
4194 {
4195 h->non_got_ref = 0;
4196 return TRUE;
4197 }
4198 }
4199
4200 if (h->size == 0)
4201 {
4202 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4203 h->root.root.string);
4204 return TRUE;
4205 }
4206
4207 /* We must allocate the symbol in our .dynbss section, which will
4208 become part of the .bss section of the executable. There will be
4209 an entry for this symbol in the .dynsym section. The dynamic
4210 object will contain position independent code, so all references
4211 from the dynamic object to this symbol will go through the global
4212 offset table. The dynamic linker will use the .dynsym entry to
4213 determine the address it must put in the global offset table, so
4214 both the dynamic object and the regular object will refer to the
4215 same memory location for the variable.
4216
4217 Of course, if the symbol is referenced using SDAREL relocs, we
4218 must instead allocate it in .sbss. */
4219
4220 if (ppc_elf_hash_entry (h)->has_sda_refs)
4221 s = htab->dynsbss;
4222 else
4223 s = htab->dynbss;
4224 BFD_ASSERT (s != NULL);
4225
4226 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4227 copy the initial value out of the dynamic object and into the
4228 runtime process image. We need to remember the offset into the
4229 .rela.bss section we are going to use. */
4230 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4231 {
4232 asection *srel;
4233
4234 if (ppc_elf_hash_entry (h)->has_sda_refs)
4235 srel = htab->relsbss;
4236 else
4237 srel = htab->relbss;
4238 BFD_ASSERT (srel != NULL);
4239 srel->size += sizeof (Elf32_External_Rela);
4240 h->needs_copy = 1;
4241 }
4242
4243 /* We need to figure out the alignment required for this symbol. I
4244 have no idea how ELF linkers handle this. */
4245 power_of_two = bfd_log2 (h->size);
4246 if (power_of_two > 4)
4247 power_of_two = 4;
4248
4249 /* Apply the required alignment. */
4250 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4251 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4252 {
4253 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4254 return FALSE;
4255 }
4256
4257 /* Define the symbol as being at this point in the section. */
4258 h->root.u.def.section = s;
4259 h->root.u.def.value = s->size;
4260
4261 /* Increment the section size to make room for the symbol. */
4262 s->size += h->size;
4263
4264 return TRUE;
4265 }
4266 \f
4267 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4268 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4269 specifying the addend on the plt relocation. For -fpic code, the sym
4270 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4271 xxxxxxxx.got2.plt_pic32.<callee>. */
4272
4273 static bfd_boolean
4274 add_stub_sym (struct plt_entry *ent,
4275 struct elf_link_hash_entry *h,
4276 struct bfd_link_info *info)
4277 {
4278 struct elf_link_hash_entry *sh;
4279 size_t len1, len2, len3;
4280 char *name;
4281 const char *stub;
4282 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4283
4284 if (info->shared || info->pie)
4285 stub = ".plt_pic32.";
4286 else
4287 stub = ".plt_call32.";
4288
4289 len1 = strlen (h->root.root.string);
4290 len2 = strlen (stub);
4291 len3 = 0;
4292 if (ent->sec)
4293 len3 = strlen (ent->sec->name);
4294 name = bfd_malloc (len1 + len2 + len3 + 9);
4295 if (name == NULL)
4296 return FALSE;
4297 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4298 if (ent->sec)
4299 memcpy (name + 8, ent->sec->name, len3);
4300 memcpy (name + 8 + len3, stub, len2);
4301 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4302 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4303 if (sh == NULL)
4304 return FALSE;
4305 if (sh->root.type == bfd_link_hash_new)
4306 {
4307 sh->root.type = bfd_link_hash_defined;
4308 sh->root.u.def.section = htab->glink;
4309 sh->root.u.def.value = ent->glink_offset;
4310 sh->ref_regular = 1;
4311 sh->def_regular = 1;
4312 sh->ref_regular_nonweak = 1;
4313 sh->forced_local = 1;
4314 sh->non_elf = 0;
4315 }
4316 return TRUE;
4317 }
4318
4319 /* Allocate NEED contiguous space in .got, and return the offset.
4320 Handles allocation of the got header when crossing 32k. */
4321
4322 static bfd_vma
4323 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4324 {
4325 bfd_vma where;
4326 unsigned int max_before_header;
4327
4328 if (htab->plt_type == PLT_VXWORKS)
4329 {
4330 where = htab->got->size;
4331 htab->got->size += need;
4332 }
4333 else
4334 {
4335 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4336 if (need <= htab->got_gap)
4337 {
4338 where = max_before_header - htab->got_gap;
4339 htab->got_gap -= need;
4340 }
4341 else
4342 {
4343 if (htab->got->size + need > max_before_header
4344 && htab->got->size <= max_before_header)
4345 {
4346 htab->got_gap = max_before_header - htab->got->size;
4347 htab->got->size = max_before_header + htab->got_header_size;
4348 }
4349 where = htab->got->size;
4350 htab->got->size += need;
4351 }
4352 }
4353 return where;
4354 }
4355
4356 /* Allocate space in associated reloc sections for dynamic relocs. */
4357
4358 static bfd_boolean
4359 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4360 {
4361 struct bfd_link_info *info = inf;
4362 struct ppc_elf_link_hash_entry *eh;
4363 struct ppc_elf_link_hash_table *htab;
4364 struct ppc_elf_dyn_relocs *p;
4365
4366 if (h->root.type == bfd_link_hash_indirect)
4367 return TRUE;
4368
4369 if (h->root.type == bfd_link_hash_warning)
4370 /* When warning symbols are created, they **replace** the "real"
4371 entry in the hash table, thus we never get to see the real
4372 symbol in a hash traversal. So look at it now. */
4373 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4374
4375 htab = ppc_elf_hash_table (info);
4376 if (htab->elf.dynamic_sections_created)
4377 {
4378 struct plt_entry *ent;
4379 bfd_boolean doneone = FALSE;
4380 bfd_vma plt_offset = 0, glink_offset = 0;
4381
4382 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4383 if (ent->plt.refcount > 0)
4384 {
4385 /* Make sure this symbol is output as a dynamic symbol. */
4386 if (h->dynindx == -1
4387 && !h->forced_local)
4388 {
4389 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4390 return FALSE;
4391 }
4392
4393 if (info->shared
4394 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4395 {
4396 asection *s = htab->plt;
4397
4398 if (htab->plt_type == PLT_NEW)
4399 {
4400 if (!doneone)
4401 {
4402 plt_offset = s->size;
4403 s->size += 4;
4404 }
4405 ent->plt.offset = plt_offset;
4406
4407 s = htab->glink;
4408 if (!doneone || info->shared || info->pie)
4409 {
4410 glink_offset = s->size;
4411 s->size += GLINK_ENTRY_SIZE;
4412 }
4413 if (!doneone
4414 && !info->shared
4415 && !h->def_regular)
4416 {
4417 h->root.u.def.section = s;
4418 h->root.u.def.value = glink_offset;
4419 }
4420 ent->glink_offset = glink_offset;
4421
4422 if (htab->emit_stub_syms
4423 && !add_stub_sym (ent, h, info))
4424 return FALSE;
4425 }
4426 else
4427 {
4428 if (!doneone)
4429 {
4430 /* If this is the first .plt entry, make room
4431 for the special first entry. */
4432 if (s->size == 0)
4433 s->size += htab->plt_initial_entry_size;
4434
4435 /* The PowerPC PLT is actually composed of two
4436 parts, the first part is 2 words (for a load
4437 and a jump), and then there is a remaining
4438 word available at the end. */
4439 plt_offset = (htab->plt_initial_entry_size
4440 + (htab->plt_slot_size
4441 * ((s->size
4442 - htab->plt_initial_entry_size)
4443 / htab->plt_entry_size)));
4444
4445 /* If this symbol is not defined in a regular
4446 file, and we are not generating a shared
4447 library, then set the symbol to this location
4448 in the .plt. This is required to make
4449 function pointers compare as equal between
4450 the normal executable and the shared library. */
4451 if (! info->shared
4452 && !h->def_regular)
4453 {
4454 h->root.u.def.section = s;
4455 h->root.u.def.value = plt_offset;
4456 }
4457
4458 /* Make room for this entry. */
4459 s->size += htab->plt_entry_size;
4460 /* After the 8192nd entry, room for two entries
4461 is allocated. */
4462 if (htab->plt_type == PLT_OLD
4463 && (s->size - htab->plt_initial_entry_size)
4464 / htab->plt_entry_size
4465 > PLT_NUM_SINGLE_ENTRIES)
4466 s->size += htab->plt_entry_size;
4467 }
4468 ent->plt.offset = plt_offset;
4469 }
4470
4471 /* We also need to make an entry in the .rela.plt section. */
4472 if (!doneone)
4473 {
4474 htab->relplt->size += sizeof (Elf32_External_Rela);
4475
4476 if (htab->plt_type == PLT_VXWORKS)
4477 {
4478 /* Allocate space for the unloaded relocations. */
4479 if (!info->shared)
4480 {
4481 if (ent->plt.offset
4482 == (bfd_vma) htab->plt_initial_entry_size)
4483 {
4484 htab->srelplt2->size
4485 += sizeof (Elf32_External_Rela)
4486 * VXWORKS_PLTRESOLVE_RELOCS;
4487 }
4488
4489 htab->srelplt2->size
4490 += sizeof (Elf32_External_Rela)
4491 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4492 }
4493
4494 /* Every PLT entry has an associated GOT entry in
4495 .got.plt. */
4496 htab->sgotplt->size += 4;
4497 }
4498 doneone = TRUE;
4499 }
4500 }
4501 else
4502 ent->plt.offset = (bfd_vma) -1;
4503
4504 if (!doneone)
4505 {
4506 h->plt.plist = NULL;
4507 h->needs_plt = 0;
4508 }
4509 }
4510 }
4511 else
4512 {
4513 h->plt.plist = NULL;
4514 h->needs_plt = 0;
4515 }
4516
4517 eh = (struct ppc_elf_link_hash_entry *) h;
4518 if (eh->elf.got.refcount > 0)
4519 {
4520 /* Make sure this symbol is output as a dynamic symbol. */
4521 if (eh->elf.dynindx == -1
4522 && !eh->elf.forced_local)
4523 {
4524 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4525 return FALSE;
4526 }
4527
4528 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4529 && !eh->elf.def_dynamic)
4530 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4531 eh->elf.got.offset = (bfd_vma) -1;
4532 else
4533 {
4534 bfd_boolean dyn;
4535 unsigned int need = 0;
4536 if ((eh->tls_mask & TLS_TLS) != 0)
4537 {
4538 if ((eh->tls_mask & TLS_LD) != 0)
4539 need += 8;
4540 if ((eh->tls_mask & TLS_GD) != 0)
4541 need += 8;
4542 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4543 need += 4;
4544 if ((eh->tls_mask & TLS_DTPREL) != 0)
4545 need += 4;
4546 }
4547 else
4548 need += 4;
4549 eh->elf.got.offset = allocate_got (htab, need);
4550 dyn = htab->elf.dynamic_sections_created;
4551 if ((info->shared
4552 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4553 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4554 || eh->elf.root.type != bfd_link_hash_undefweak))
4555 {
4556 /* All the entries we allocated need relocs.
4557 Except LD only needs one. */
4558 if ((eh->tls_mask & TLS_LD) != 0)
4559 need -= 4;
4560 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4561 }
4562 }
4563 }
4564 else
4565 eh->elf.got.offset = (bfd_vma) -1;
4566
4567 if (eh->dyn_relocs == NULL)
4568 return TRUE;
4569
4570 /* In the shared -Bsymbolic case, discard space allocated for
4571 dynamic pc-relative relocs against symbols which turn out to be
4572 defined in regular objects. For the normal shared case, discard
4573 space for relocs that have become local due to symbol visibility
4574 changes. */
4575
4576 if (info->shared)
4577 {
4578 /* Relocs that use pc_count are those that appear on a call insn,
4579 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4580 generated via assembly. We want calls to protected symbols to
4581 resolve directly to the function rather than going via the plt.
4582 If people want function pointer comparisons to work as expected
4583 then they should avoid writing weird assembly. */
4584 if (SYMBOL_CALLS_LOCAL (info, h))
4585 {
4586 struct ppc_elf_dyn_relocs **pp;
4587
4588 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4589 {
4590 p->count -= p->pc_count;
4591 p->pc_count = 0;
4592 if (p->count == 0)
4593 *pp = p->next;
4594 else
4595 pp = &p->next;
4596 }
4597 }
4598
4599 /* Also discard relocs on undefined weak syms with non-default
4600 visibility. */
4601 if (eh->dyn_relocs != NULL
4602 && h->root.type == bfd_link_hash_undefweak)
4603 {
4604 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4605 eh->dyn_relocs = NULL;
4606
4607 /* Make sure undefined weak symbols are output as a dynamic
4608 symbol in PIEs. */
4609 else if (h->dynindx == -1
4610 && !h->forced_local)
4611 {
4612 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4613 return FALSE;
4614 }
4615 }
4616 }
4617 else if (ELIMINATE_COPY_RELOCS)
4618 {
4619 /* For the non-shared case, discard space for relocs against
4620 symbols which turn out to need copy relocs or are not
4621 dynamic. */
4622
4623 if (!h->non_got_ref
4624 && h->def_dynamic
4625 && !h->def_regular)
4626 {
4627 /* Make sure this symbol is output as a dynamic symbol.
4628 Undefined weak syms won't yet be marked as dynamic. */
4629 if (h->dynindx == -1
4630 && !h->forced_local)
4631 {
4632 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4633 return FALSE;
4634 }
4635
4636 /* If that succeeded, we know we'll be keeping all the
4637 relocs. */
4638 if (h->dynindx != -1)
4639 goto keep;
4640 }
4641
4642 eh->dyn_relocs = NULL;
4643
4644 keep: ;
4645 }
4646
4647 /* Finally, allocate space. */
4648 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4649 {
4650 asection *sreloc = elf_section_data (p->sec)->sreloc;
4651 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4652 }
4653
4654 return TRUE;
4655 }
4656
4657 /* Find any dynamic relocs that apply to read-only sections. */
4658
4659 static bfd_boolean
4660 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4661 {
4662 struct ppc_elf_dyn_relocs *p;
4663
4664 if (h->root.type == bfd_link_hash_indirect)
4665 return TRUE;
4666
4667 if (h->root.type == bfd_link_hash_warning)
4668 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4669
4670 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4671 {
4672 asection *s = p->sec->output_section;
4673
4674 if (s != NULL
4675 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4676 == (SEC_READONLY | SEC_ALLOC)))
4677 {
4678 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4679
4680 /* Not an error, just cut short the traversal. */
4681 return FALSE;
4682 }
4683 }
4684 return TRUE;
4685 }
4686
4687 /* Set the sizes of the dynamic sections. */
4688
4689 static bfd_boolean
4690 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4691 struct bfd_link_info *info)
4692 {
4693 struct ppc_elf_link_hash_table *htab;
4694 asection *s;
4695 bfd_boolean relocs;
4696 bfd *ibfd;
4697
4698 #ifdef DEBUG
4699 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4700 #endif
4701
4702 htab = ppc_elf_hash_table (info);
4703 BFD_ASSERT (htab->elf.dynobj != NULL);
4704
4705 if (elf_hash_table (info)->dynamic_sections_created)
4706 {
4707 /* Set the contents of the .interp section to the interpreter. */
4708 if (info->executable)
4709 {
4710 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4711 BFD_ASSERT (s != NULL);
4712 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4713 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4714 }
4715 }
4716
4717 if (htab->plt_type == PLT_OLD)
4718 htab->got_header_size = 16;
4719 else if (htab->plt_type == PLT_NEW)
4720 htab->got_header_size = 12;
4721
4722 /* Set up .got offsets for local syms, and space for local dynamic
4723 relocs. */
4724 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4725 {
4726 bfd_signed_vma *local_got;
4727 bfd_signed_vma *end_local_got;
4728 char *lgot_masks;
4729 bfd_size_type locsymcount;
4730 Elf_Internal_Shdr *symtab_hdr;
4731
4732 if (!is_ppc_elf_target (ibfd->xvec))
4733 continue;
4734
4735 for (s = ibfd->sections; s != NULL; s = s->next)
4736 {
4737 struct ppc_elf_dyn_relocs *p;
4738
4739 for (p = ((struct ppc_elf_dyn_relocs *)
4740 elf_section_data (s)->local_dynrel);
4741 p != NULL;
4742 p = p->next)
4743 {
4744 if (!bfd_is_abs_section (p->sec)
4745 && bfd_is_abs_section (p->sec->output_section))
4746 {
4747 /* Input section has been discarded, either because
4748 it is a copy of a linkonce section or due to
4749 linker script /DISCARD/, so we'll be discarding
4750 the relocs too. */
4751 }
4752 else if (p->count != 0)
4753 {
4754 elf_section_data (p->sec)->sreloc->size
4755 += p->count * sizeof (Elf32_External_Rela);
4756 if ((p->sec->output_section->flags
4757 & (SEC_READONLY | SEC_ALLOC))
4758 == (SEC_READONLY | SEC_ALLOC))
4759 info->flags |= DF_TEXTREL;
4760 }
4761 }
4762 }
4763
4764 local_got = elf_local_got_refcounts (ibfd);
4765 if (!local_got)
4766 continue;
4767
4768 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4769 locsymcount = symtab_hdr->sh_info;
4770 end_local_got = local_got + locsymcount;
4771 lgot_masks = (char *) end_local_got;
4772 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4773 if (*local_got > 0)
4774 {
4775 if (*lgot_masks == (TLS_TLS | TLS_LD))
4776 {
4777 /* If just an LD reloc, we'll just use
4778 htab->tlsld_got.offset. */
4779 htab->tlsld_got.refcount += 1;
4780 *local_got = (bfd_vma) -1;
4781 }
4782 else
4783 {
4784 unsigned int need = 0;
4785 if ((*lgot_masks & TLS_TLS) != 0)
4786 {
4787 if ((*lgot_masks & TLS_GD) != 0)
4788 need += 8;
4789 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4790 need += 4;
4791 if ((*lgot_masks & TLS_DTPREL) != 0)
4792 need += 4;
4793 }
4794 else
4795 need += 4;
4796 *local_got = allocate_got (htab, need);
4797 if (info->shared)
4798 htab->relgot->size += (need
4799 * (sizeof (Elf32_External_Rela) / 4));
4800 }
4801 }
4802 else
4803 *local_got = (bfd_vma) -1;
4804 }
4805
4806 if (htab->tlsld_got.refcount > 0)
4807 {
4808 htab->tlsld_got.offset = allocate_got (htab, 8);
4809 if (info->shared)
4810 htab->relgot->size += sizeof (Elf32_External_Rela);
4811 }
4812 else
4813 htab->tlsld_got.offset = (bfd_vma) -1;
4814
4815 /* Allocate space for global sym dynamic relocs. */
4816 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4817
4818 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4819 {
4820 unsigned int g_o_t = 32768;
4821
4822 /* If we haven't allocated the header, do so now. When we get here,
4823 for old plt/got the got size will be 0 to 32764 (not allocated),
4824 or 32780 to 65536 (header allocated). For new plt/got, the
4825 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4826 if (htab->got->size <= 32768)
4827 {
4828 g_o_t = htab->got->size;
4829 if (htab->plt_type == PLT_OLD)
4830 g_o_t += 4;
4831 htab->got->size += htab->got_header_size;
4832 }
4833
4834 htab->elf.hgot->root.u.def.value = g_o_t;
4835 }
4836
4837 if (htab->glink != NULL && htab->glink->size != 0)
4838 {
4839 htab->glink_pltresolve = htab->glink->size;
4840 /* Space for the branch table. */
4841 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4842 /* Pad out to align the start of PLTresolve. */
4843 htab->glink->size += -htab->glink->size & 15;
4844 htab->glink->size += GLINK_PLTRESOLVE;
4845
4846 if (htab->emit_stub_syms)
4847 {
4848 struct elf_link_hash_entry *sh;
4849 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4850 TRUE, FALSE, FALSE);
4851 if (sh == NULL)
4852 return FALSE;
4853 if (sh->root.type == bfd_link_hash_new)
4854 {
4855 sh->root.type = bfd_link_hash_defined;
4856 sh->root.u.def.section = htab->glink;
4857 sh->root.u.def.value = htab->glink_pltresolve;
4858 sh->ref_regular = 1;
4859 sh->def_regular = 1;
4860 sh->ref_regular_nonweak = 1;
4861 sh->forced_local = 1;
4862 sh->non_elf = 0;
4863 }
4864 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4865 TRUE, FALSE, FALSE);
4866 if (sh == NULL)
4867 return FALSE;
4868 if (sh->root.type == bfd_link_hash_new)
4869 {
4870 sh->root.type = bfd_link_hash_defined;
4871 sh->root.u.def.section = htab->glink;
4872 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4873 sh->ref_regular = 1;
4874 sh->def_regular = 1;
4875 sh->ref_regular_nonweak = 1;
4876 sh->forced_local = 1;
4877 sh->non_elf = 0;
4878 }
4879 }
4880 }
4881
4882 /* We've now determined the sizes of the various dynamic sections.
4883 Allocate memory for them. */
4884 relocs = FALSE;
4885 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4886 {
4887 bfd_boolean strip_section = TRUE;
4888
4889 if ((s->flags & SEC_LINKER_CREATED) == 0)
4890 continue;
4891
4892 if (s == htab->plt
4893 || s == htab->glink
4894 || s == htab->got
4895 || s == htab->sgotplt
4896 || s == htab->sbss
4897 || s == htab->dynbss
4898 || s == htab->dynsbss)
4899 {
4900 /* We'd like to strip these sections if they aren't needed, but if
4901 we've exported dynamic symbols from them we must leave them.
4902 It's too late to tell BFD to get rid of the symbols. */
4903 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4904 strip_section = FALSE;
4905 /* Strip this section if we don't need it; see the
4906 comment below. */
4907 }
4908 else if (s == htab->sdata[0].section
4909 || s == htab->sdata[1].section)
4910 {
4911 /* Strip these too. */
4912 }
4913 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
4914 {
4915 if (s->size != 0)
4916 {
4917 /* Remember whether there are any relocation sections. */
4918 relocs = TRUE;
4919
4920 /* We use the reloc_count field as a counter if we need
4921 to copy relocs into the output file. */
4922 s->reloc_count = 0;
4923 }
4924 }
4925 else
4926 {
4927 /* It's not one of our sections, so don't allocate space. */
4928 continue;
4929 }
4930
4931 if (s->size == 0 && strip_section)
4932 {
4933 /* If we don't need this section, strip it from the
4934 output file. This is mostly to handle .rela.bss and
4935 .rela.plt. We must create both sections in
4936 create_dynamic_sections, because they must be created
4937 before the linker maps input sections to output
4938 sections. The linker does that before
4939 adjust_dynamic_symbol is called, and it is that
4940 function which decides whether anything needs to go
4941 into these sections. */
4942 s->flags |= SEC_EXCLUDE;
4943 continue;
4944 }
4945
4946 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4947 continue;
4948
4949 /* Allocate memory for the section contents. */
4950 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4951 if (s->contents == NULL)
4952 return FALSE;
4953 }
4954
4955 if (htab->elf.dynamic_sections_created)
4956 {
4957 /* Add some entries to the .dynamic section. We fill in the
4958 values later, in ppc_elf_finish_dynamic_sections, but we
4959 must add the entries now so that we get the correct size for
4960 the .dynamic section. The DT_DEBUG entry is filled in by the
4961 dynamic linker and used by the debugger. */
4962 #define add_dynamic_entry(TAG, VAL) \
4963 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4964
4965 if (info->executable)
4966 {
4967 if (!add_dynamic_entry (DT_DEBUG, 0))
4968 return FALSE;
4969 }
4970
4971 if (htab->plt != NULL && htab->plt->size != 0)
4972 {
4973 if (!add_dynamic_entry (DT_PLTGOT, 0)
4974 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4975 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4976 || !add_dynamic_entry (DT_JMPREL, 0))
4977 return FALSE;
4978 }
4979
4980 if (htab->glink != NULL && htab->glink->size != 0)
4981 {
4982 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4983 return FALSE;
4984 }
4985
4986 if (relocs)
4987 {
4988 if (!add_dynamic_entry (DT_RELA, 0)
4989 || !add_dynamic_entry (DT_RELASZ, 0)
4990 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4991 return FALSE;
4992 }
4993
4994 /* If any dynamic relocs apply to a read-only section, then we
4995 need a DT_TEXTREL entry. */
4996 if ((info->flags & DF_TEXTREL) == 0)
4997 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4998 info);
4999
5000 if ((info->flags & DF_TEXTREL) != 0)
5001 {
5002 if (!add_dynamic_entry (DT_TEXTREL, 0))
5003 return FALSE;
5004 }
5005 }
5006 #undef add_dynamic_entry
5007
5008 return TRUE;
5009 }
5010 \f
5011 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5012
5013 static const int shared_stub_entry[] =
5014 {
5015 0x7c0802a6, /* mflr 0 */
5016 0x429f0005, /* bcl 20, 31, .Lxxx */
5017 0x7d6802a6, /* mflr 11 */
5018 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5019 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5020 0x7c0803a6, /* mtlr 0 */
5021 0x7d6903a6, /* mtctr 11 */
5022 0x4e800420, /* bctr */
5023 };
5024
5025 static const int stub_entry[] =
5026 {
5027 0x3d600000, /* lis 11,xxx@ha */
5028 0x396b0000, /* addi 11,11,xxx@l */
5029 0x7d6903a6, /* mtctr 11 */
5030 0x4e800420, /* bctr */
5031 };
5032
5033 static bfd_boolean
5034 ppc_elf_relax_section (bfd *abfd,
5035 asection *isec,
5036 struct bfd_link_info *link_info,
5037 bfd_boolean *again)
5038 {
5039 struct one_fixup
5040 {
5041 struct one_fixup *next;
5042 asection *tsec;
5043 bfd_vma toff;
5044 bfd_vma trampoff;
5045 };
5046
5047 Elf_Internal_Shdr *symtab_hdr;
5048 bfd_byte *contents = NULL;
5049 Elf_Internal_Sym *isymbuf = NULL;
5050 Elf_Internal_Rela *internal_relocs = NULL;
5051 Elf_Internal_Rela *irel, *irelend;
5052 struct one_fixup *fixups = NULL;
5053 bfd_boolean changed;
5054 struct ppc_elf_link_hash_table *htab;
5055 bfd_size_type trampoff;
5056 asection *got2;
5057
5058 *again = FALSE;
5059
5060 /* Nothing to do if there are no relocations, and no need to do
5061 anything with non-alloc sections. */
5062 if ((isec->flags & SEC_ALLOC) == 0
5063 || (isec->flags & SEC_RELOC) == 0
5064 || isec->reloc_count == 0)
5065 return TRUE;
5066
5067 trampoff = (isec->size + 3) & (bfd_vma) -4;
5068 /* Space for a branch around any trampolines. */
5069 trampoff += 4;
5070
5071 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5072
5073 /* Get a copy of the native relocations. */
5074 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5075 link_info->keep_memory);
5076 if (internal_relocs == NULL)
5077 goto error_return;
5078
5079 htab = ppc_elf_hash_table (link_info);
5080 got2 = bfd_get_section_by_name (abfd, ".got2");
5081
5082 irelend = internal_relocs + isec->reloc_count;
5083 for (irel = internal_relocs; irel < irelend; irel++)
5084 {
5085 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5086 bfd_vma symaddr, reladdr, toff, roff;
5087 asection *tsec;
5088 struct one_fixup *f;
5089 size_t insn_offset = 0;
5090 bfd_vma max_branch_offset, val;
5091 bfd_byte *hit_addr;
5092 unsigned long t0;
5093 unsigned char sym_type;
5094
5095 switch (r_type)
5096 {
5097 case R_PPC_REL24:
5098 case R_PPC_LOCAL24PC:
5099 case R_PPC_PLTREL24:
5100 max_branch_offset = 1 << 25;
5101 break;
5102
5103 case R_PPC_REL14:
5104 case R_PPC_REL14_BRTAKEN:
5105 case R_PPC_REL14_BRNTAKEN:
5106 max_branch_offset = 1 << 15;
5107 break;
5108
5109 default:
5110 continue;
5111 }
5112
5113 /* Get the value of the symbol referred to by the reloc. */
5114 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5115 {
5116 /* A local symbol. */
5117 Elf_Internal_Sym *isym;
5118
5119 /* Read this BFD's local symbols. */
5120 if (isymbuf == NULL)
5121 {
5122 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5123 if (isymbuf == NULL)
5124 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5125 symtab_hdr->sh_info, 0,
5126 NULL, NULL, NULL);
5127 if (isymbuf == 0)
5128 goto error_return;
5129 }
5130 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5131 if (isym->st_shndx == SHN_UNDEF)
5132 continue; /* We can't do anything with undefined symbols. */
5133 else if (isym->st_shndx == SHN_ABS)
5134 tsec = bfd_abs_section_ptr;
5135 else if (isym->st_shndx == SHN_COMMON)
5136 tsec = bfd_com_section_ptr;
5137 else
5138 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5139
5140 toff = isym->st_value;
5141 sym_type = ELF_ST_TYPE (isym->st_info);
5142 }
5143 else
5144 {
5145 /* Global symbol handling. */
5146 unsigned long indx;
5147 struct elf_link_hash_entry *h;
5148
5149 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5150 h = elf_sym_hashes (abfd)[indx];
5151
5152 while (h->root.type == bfd_link_hash_indirect
5153 || h->root.type == bfd_link_hash_warning)
5154 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5155
5156 tsec = NULL;
5157 toff = 0;
5158 if (r_type == R_PPC_PLTREL24
5159 && htab->plt != NULL)
5160 {
5161 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5162
5163 if (ent != NULL)
5164 {
5165 if (htab->plt_type == PLT_NEW)
5166 {
5167 tsec = htab->glink;
5168 toff = ent->glink_offset;
5169 }
5170 else
5171 {
5172 tsec = htab->plt;
5173 toff = ent->plt.offset;
5174 }
5175 }
5176 }
5177 if (tsec != NULL)
5178 ;
5179 else if (h->root.type == bfd_link_hash_defined
5180 || h->root.type == bfd_link_hash_defweak)
5181 {
5182 tsec = h->root.u.def.section;
5183 toff = h->root.u.def.value;
5184 }
5185 else
5186 continue;
5187
5188 sym_type = h->type;
5189 }
5190
5191 /* If the branch and target are in the same section, you have
5192 no hope of adding stubs. We'll error out later should the
5193 branch overflow. */
5194 if (tsec == isec)
5195 continue;
5196
5197 /* There probably isn't any reason to handle symbols in
5198 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5199 attribute for a code section, and we are only looking at
5200 branches. However, implement it correctly here as a
5201 reference for other target relax_section functions. */
5202 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5203 {
5204 /* At this stage in linking, no SEC_MERGE symbol has been
5205 adjusted, so all references to such symbols need to be
5206 passed through _bfd_merged_section_offset. (Later, in
5207 relocate_section, all SEC_MERGE symbols *except* for
5208 section symbols have been adjusted.)
5209
5210 gas may reduce relocations against symbols in SEC_MERGE
5211 sections to a relocation against the section symbol when
5212 the original addend was zero. When the reloc is against
5213 a section symbol we should include the addend in the
5214 offset passed to _bfd_merged_section_offset, since the
5215 location of interest is the original symbol. On the
5216 other hand, an access to "sym+addend" where "sym" is not
5217 a section symbol should not include the addend; Such an
5218 access is presumed to be an offset from "sym"; The
5219 location of interest is just "sym". */
5220 if (sym_type == STT_SECTION)
5221 toff += irel->r_addend;
5222
5223 toff = _bfd_merged_section_offset (abfd, &tsec,
5224 elf_section_data (tsec)->sec_info,
5225 toff);
5226
5227 if (sym_type != STT_SECTION)
5228 toff += irel->r_addend;
5229 }
5230 /* PLTREL24 addends are special. */
5231 else if (r_type != R_PPC_PLTREL24)
5232 toff += irel->r_addend;
5233
5234 /* Attempted -shared link of non-pic code loses. */
5235 if (tsec->output_section == NULL)
5236 continue;
5237
5238 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5239
5240 roff = irel->r_offset;
5241 reladdr = isec->output_section->vma + isec->output_offset + roff;
5242
5243 /* If the branch is in range, no need to do anything. */
5244 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5245 continue;
5246
5247 /* Look for an existing fixup to this address. */
5248 for (f = fixups; f ; f = f->next)
5249 if (f->tsec == tsec && f->toff == toff)
5250 break;
5251
5252 if (f == NULL)
5253 {
5254 size_t size;
5255 unsigned long stub_rtype;
5256
5257 val = trampoff - roff;
5258 if (val >= max_branch_offset)
5259 /* Oh dear, we can't reach a trampoline. Don't try to add
5260 one. We'll report an error later. */
5261 continue;
5262
5263 if (link_info->shared)
5264 {
5265 size = 4 * ARRAY_SIZE (shared_stub_entry);
5266 insn_offset = 12;
5267 stub_rtype = R_PPC_RELAX32PC;
5268 }
5269 else
5270 {
5271 size = 4 * ARRAY_SIZE (stub_entry);
5272 insn_offset = 0;
5273 stub_rtype = R_PPC_RELAX32;
5274 }
5275
5276 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5277 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5278 abort ();
5279 if (tsec == htab->plt
5280 || tsec == htab->glink)
5281 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5282
5283 /* Hijack the old relocation. Since we need two
5284 relocations for this use a "composite" reloc. */
5285 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5286 stub_rtype);
5287 irel->r_offset = trampoff + insn_offset;
5288
5289 /* Record the fixup so we don't do it again this section. */
5290 f = bfd_malloc (sizeof (*f));
5291 f->next = fixups;
5292 f->tsec = tsec;
5293 f->toff = toff;
5294 f->trampoff = trampoff;
5295 fixups = f;
5296
5297 trampoff += size;
5298 }
5299 else
5300 {
5301 val = f->trampoff - roff;
5302 if (val >= max_branch_offset)
5303 continue;
5304
5305 /* Nop out the reloc, since we're finalizing things here. */
5306 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5307 }
5308
5309 /* Get the section contents. */
5310 if (contents == NULL)
5311 {
5312 /* Get cached copy if it exists. */
5313 if (elf_section_data (isec)->this_hdr.contents != NULL)
5314 contents = elf_section_data (isec)->this_hdr.contents;
5315 else
5316 {
5317 /* Go get them off disk. */
5318 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5319 goto error_return;
5320 }
5321 }
5322
5323 /* Fix up the existing branch to hit the trampoline. */
5324 hit_addr = contents + roff;
5325 switch (r_type)
5326 {
5327 case R_PPC_REL24:
5328 case R_PPC_LOCAL24PC:
5329 case R_PPC_PLTREL24:
5330 t0 = bfd_get_32 (abfd, hit_addr);
5331 t0 &= ~0x3fffffc;
5332 t0 |= val & 0x3fffffc;
5333 bfd_put_32 (abfd, t0, hit_addr);
5334 break;
5335
5336 case R_PPC_REL14:
5337 case R_PPC_REL14_BRTAKEN:
5338 case R_PPC_REL14_BRNTAKEN:
5339 t0 = bfd_get_32 (abfd, hit_addr);
5340 t0 &= ~0xfffc;
5341 t0 |= val & 0xfffc;
5342 bfd_put_32 (abfd, t0, hit_addr);
5343 break;
5344 }
5345 }
5346
5347 /* Write out the trampolines. */
5348 changed = fixups != NULL;
5349 if (fixups != NULL)
5350 {
5351 const int *stub;
5352 bfd_byte *dest;
5353 bfd_vma val;
5354 int i, size;
5355
5356 do
5357 {
5358 struct one_fixup *f = fixups;
5359 fixups = fixups->next;
5360 free (f);
5361 }
5362 while (fixups);
5363
5364 contents = bfd_realloc (contents, trampoff);
5365 if (contents == NULL)
5366 goto error_return;
5367
5368 isec->size = (isec->size + 3) & (bfd_vma) -4;
5369 /* Branch around the trampolines. */
5370 val = trampoff - isec->size + 0x48000000;
5371 dest = contents + isec->size;
5372 isec->size = trampoff;
5373 bfd_put_32 (abfd, val, dest);
5374 dest += 4;
5375
5376 if (link_info->shared)
5377 {
5378 stub = shared_stub_entry;
5379 size = ARRAY_SIZE (shared_stub_entry);
5380 }
5381 else
5382 {
5383 stub = stub_entry;
5384 size = ARRAY_SIZE (stub_entry);
5385 }
5386
5387 i = 0;
5388 while (dest < contents + trampoff)
5389 {
5390 bfd_put_32 (abfd, stub[i], dest);
5391 i++;
5392 if (i == size)
5393 i = 0;
5394 dest += 4;
5395 }
5396 BFD_ASSERT (i == 0);
5397 }
5398
5399 if (isymbuf != NULL
5400 && symtab_hdr->contents != (unsigned char *) isymbuf)
5401 {
5402 if (! link_info->keep_memory)
5403 free (isymbuf);
5404 else
5405 {
5406 /* Cache the symbols for elf_link_input_bfd. */
5407 symtab_hdr->contents = (unsigned char *) isymbuf;
5408 }
5409 }
5410
5411 if (contents != NULL
5412 && elf_section_data (isec)->this_hdr.contents != contents)
5413 {
5414 if (!changed && !link_info->keep_memory)
5415 free (contents);
5416 else
5417 {
5418 /* Cache the section contents for elf_link_input_bfd. */
5419 elf_section_data (isec)->this_hdr.contents = contents;
5420 }
5421 }
5422
5423 if (elf_section_data (isec)->relocs != internal_relocs)
5424 {
5425 if (!changed)
5426 free (internal_relocs);
5427 else
5428 elf_section_data (isec)->relocs = internal_relocs;
5429 }
5430
5431 *again = changed;
5432 return TRUE;
5433
5434 error_return:
5435 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5436 free (isymbuf);
5437 if (contents != NULL
5438 && elf_section_data (isec)->this_hdr.contents != contents)
5439 free (contents);
5440 if (internal_relocs != NULL
5441 && elf_section_data (isec)->relocs != internal_relocs)
5442 free (internal_relocs);
5443 return FALSE;
5444 }
5445 \f
5446 /* What to do when ld finds relocations against symbols defined in
5447 discarded sections. */
5448
5449 static unsigned int
5450 ppc_elf_action_discarded (asection *sec)
5451 {
5452 if (strcmp (".fixup", sec->name) == 0)
5453 return 0;
5454
5455 if (strcmp (".got2", sec->name) == 0)
5456 return 0;
5457
5458 return _bfd_elf_default_action_discarded (sec);
5459 }
5460 \f
5461 /* Fill in the address for a pointer generated in a linker section. */
5462
5463 static bfd_vma
5464 elf_finish_pointer_linker_section (bfd *input_bfd,
5465 elf_linker_section_t *lsect,
5466 struct elf_link_hash_entry *h,
5467 bfd_vma relocation,
5468 const Elf_Internal_Rela *rel)
5469 {
5470 elf_linker_section_pointers_t *linker_section_ptr;
5471
5472 BFD_ASSERT (lsect != NULL);
5473
5474 if (h != NULL)
5475 {
5476 /* Handle global symbol. */
5477 struct ppc_elf_link_hash_entry *eh;
5478
5479 eh = (struct ppc_elf_link_hash_entry *) h;
5480 BFD_ASSERT (eh->elf.def_regular);
5481 linker_section_ptr = eh->linker_section_pointer;
5482 }
5483 else
5484 {
5485 /* Handle local symbol. */
5486 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5487
5488 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5489 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5490 }
5491
5492 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5493 rel->r_addend,
5494 lsect);
5495 BFD_ASSERT (linker_section_ptr != NULL);
5496
5497 /* Offset will always be a multiple of four, so use the bottom bit
5498 as a "written" flag. */
5499 if ((linker_section_ptr->offset & 1) == 0)
5500 {
5501 bfd_put_32 (lsect->section->owner,
5502 relocation + linker_section_ptr->addend,
5503 lsect->section->contents + linker_section_ptr->offset);
5504 linker_section_ptr->offset += 1;
5505 }
5506
5507 relocation = (lsect->section->output_offset
5508 + linker_section_ptr->offset - 1
5509 - 0x8000);
5510
5511 #ifdef DEBUG
5512 fprintf (stderr,
5513 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5514 lsect->name, (long) relocation, (long) relocation);
5515 #endif
5516
5517 /* Subtract out the addend, because it will get added back in by the normal
5518 processing. */
5519 return relocation - linker_section_ptr->addend;
5520 }
5521
5522 /* The RELOCATE_SECTION function is called by the ELF backend linker
5523 to handle the relocations for a section.
5524
5525 The relocs are always passed as Rela structures; if the section
5526 actually uses Rel structures, the r_addend field will always be
5527 zero.
5528
5529 This function is responsible for adjust the section contents as
5530 necessary, and (if using Rela relocs and generating a
5531 relocatable output file) adjusting the reloc addend as
5532 necessary.
5533
5534 This function does not have to worry about setting the reloc
5535 address or the reloc symbol index.
5536
5537 LOCAL_SYMS is a pointer to the swapped in local symbols.
5538
5539 LOCAL_SECTIONS is an array giving the section in the input file
5540 corresponding to the st_shndx field of each local symbol.
5541
5542 The global hash table entry for the global symbols can be found
5543 via elf_sym_hashes (input_bfd).
5544
5545 When generating relocatable output, this function must handle
5546 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5547 going to be the section symbol corresponding to the output
5548 section, which means that the addend must be adjusted
5549 accordingly. */
5550
5551 static bfd_boolean
5552 ppc_elf_relocate_section (bfd *output_bfd,
5553 struct bfd_link_info *info,
5554 bfd *input_bfd,
5555 asection *input_section,
5556 bfd_byte *contents,
5557 Elf_Internal_Rela *relocs,
5558 Elf_Internal_Sym *local_syms,
5559 asection **local_sections)
5560 {
5561 Elf_Internal_Shdr *symtab_hdr;
5562 struct elf_link_hash_entry **sym_hashes;
5563 struct ppc_elf_link_hash_table *htab;
5564 Elf_Internal_Rela *rel;
5565 Elf_Internal_Rela *relend;
5566 Elf_Internal_Rela outrel;
5567 bfd_byte *loc;
5568 asection *got2, *sreloc = NULL;
5569 bfd_vma *local_got_offsets;
5570 bfd_boolean ret = TRUE;
5571 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5572
5573 #ifdef DEBUG
5574 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5575 "%ld relocations%s",
5576 input_bfd, input_section,
5577 (long) input_section->reloc_count,
5578 (info->relocatable) ? " (relocatable)" : "");
5579 #endif
5580
5581 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5582
5583 /* Initialize howto table if not already done. */
5584 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5585 ppc_elf_howto_init ();
5586
5587 htab = ppc_elf_hash_table (info);
5588 local_got_offsets = elf_local_got_offsets (input_bfd);
5589 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5590 sym_hashes = elf_sym_hashes (input_bfd);
5591 rel = relocs;
5592 relend = relocs + input_section->reloc_count;
5593 for (; rel < relend; rel++)
5594 {
5595 enum elf_ppc_reloc_type r_type;
5596 bfd_vma addend;
5597 bfd_reloc_status_type r;
5598 Elf_Internal_Sym *sym;
5599 asection *sec;
5600 struct elf_link_hash_entry *h;
5601 const char *sym_name;
5602 reloc_howto_type *howto;
5603 unsigned long r_symndx;
5604 bfd_vma relocation;
5605 bfd_vma branch_bit, insn, from;
5606 bfd_boolean unresolved_reloc;
5607 bfd_boolean warned;
5608 unsigned int tls_type, tls_mask, tls_gd;
5609
5610 r_type = ELF32_R_TYPE (rel->r_info);
5611 sym = NULL;
5612 sec = NULL;
5613 h = NULL;
5614 unresolved_reloc = FALSE;
5615 warned = FALSE;
5616 r_symndx = ELF32_R_SYM (rel->r_info);
5617
5618 if (r_symndx < symtab_hdr->sh_info)
5619 {
5620 sym = local_syms + r_symndx;
5621 sec = local_sections[r_symndx];
5622 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5623
5624 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5625 }
5626 else
5627 {
5628 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5629 r_symndx, symtab_hdr, sym_hashes,
5630 h, sec, relocation,
5631 unresolved_reloc, warned);
5632
5633 sym_name = h->root.root.string;
5634 }
5635
5636 if (sec != NULL && elf_discarded_section (sec))
5637 {
5638 /* For relocs against symbols from removed linkonce sections,
5639 or sections discarded by a linker script, we just want the
5640 section contents zeroed. Avoid any special processing. */
5641 howto = NULL;
5642 if (r_type < R_PPC_max)
5643 howto = ppc_elf_howto_table[r_type];
5644 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5645 rel->r_info = 0;
5646 rel->r_addend = 0;
5647 continue;
5648 }
5649
5650 if (info->relocatable)
5651 {
5652 if (got2 != NULL
5653 && r_type == R_PPC_PLTREL24
5654 && rel->r_addend >= 32768)
5655 {
5656 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5657 addend specifies the GOT pointer offset within .got2. */
5658 rel->r_addend += got2->output_offset;
5659 }
5660 continue;
5661 }
5662
5663 /* TLS optimizations. Replace instruction sequences and relocs
5664 based on information we collected in tls_optimize. We edit
5665 RELOCS so that --emit-relocs will output something sensible
5666 for the final instruction stream. */
5667 tls_mask = 0;
5668 tls_gd = 0;
5669 if (IS_PPC_TLS_RELOC (r_type))
5670 {
5671 if (h != NULL)
5672 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5673 else if (local_got_offsets != NULL)
5674 {
5675 char *lgot_masks;
5676 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5677 tls_mask = lgot_masks[r_symndx];
5678 }
5679 }
5680
5681 /* Ensure reloc mapping code below stays sane. */
5682 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5683 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5684 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5685 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5686 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5687 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5688 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5689 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5690 abort ();
5691 switch (r_type)
5692 {
5693 default:
5694 break;
5695
5696 case R_PPC_GOT_TPREL16:
5697 case R_PPC_GOT_TPREL16_LO:
5698 if (tls_mask != 0
5699 && (tls_mask & TLS_TPREL) == 0)
5700 {
5701 bfd_vma insn;
5702 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5703 insn &= 31 << 21;
5704 insn |= 0x3c020000; /* addis 0,2,0 */
5705 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5706 r_type = R_PPC_TPREL16_HA;
5707 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5708 }
5709 break;
5710
5711 case R_PPC_TLS:
5712 if (tls_mask != 0
5713 && (tls_mask & TLS_TPREL) == 0)
5714 {
5715 bfd_vma insn, rtra;
5716 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5717 if ((insn & ((31 << 26) | (31 << 11)))
5718 == ((31 << 26) | (2 << 11)))
5719 rtra = insn & ((1 << 26) - (1 << 16));
5720 else if ((insn & ((31 << 26) | (31 << 16)))
5721 == ((31 << 26) | (2 << 16)))
5722 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5723 else
5724 abort ();
5725 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5726 /* add -> addi. */
5727 insn = 14 << 26;
5728 else if ((insn & (31 << 1)) == 23 << 1
5729 && ((insn & (31 << 6)) < 14 << 6
5730 || ((insn & (31 << 6)) >= 16 << 6
5731 && (insn & (31 << 6)) < 24 << 6)))
5732 /* load and store indexed -> dform. */
5733 insn = (32 | ((insn >> 6) & 31)) << 26;
5734 else if ((insn & (31 << 1)) == 21 << 1
5735 && (insn & (0x1a << 6)) == 0)
5736 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5737 insn = (((58 | ((insn >> 6) & 4)) << 26)
5738 | ((insn >> 6) & 1));
5739 else if ((insn & (31 << 1)) == 21 << 1
5740 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5741 /* lwax -> lwa. */
5742 insn = (58 << 26) | 2;
5743 else
5744 abort ();
5745 insn |= rtra;
5746 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5747 r_type = R_PPC_TPREL16_LO;
5748 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5749
5750 /* Was PPC_TLS which sits on insn boundary, now
5751 PPC_TPREL16_LO which is at low-order half-word. */
5752 rel->r_offset += d_offset;
5753 }
5754 break;
5755
5756 case R_PPC_GOT_TLSGD16_HI:
5757 case R_PPC_GOT_TLSGD16_HA:
5758 tls_gd = TLS_TPRELGD;
5759 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5760 goto tls_gdld_hi;
5761 break;
5762
5763 case R_PPC_GOT_TLSLD16_HI:
5764 case R_PPC_GOT_TLSLD16_HA:
5765 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5766 {
5767 tls_gdld_hi:
5768 if ((tls_mask & tls_gd) != 0)
5769 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5770 + R_PPC_GOT_TPREL16);
5771 else
5772 {
5773 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5774 rel->r_offset -= d_offset;
5775 r_type = R_PPC_NONE;
5776 }
5777 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5778 }
5779 break;
5780
5781 case R_PPC_GOT_TLSGD16:
5782 case R_PPC_GOT_TLSGD16_LO:
5783 tls_gd = TLS_TPRELGD;
5784 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5785 goto tls_get_addr_check;
5786 break;
5787
5788 case R_PPC_GOT_TLSLD16:
5789 case R_PPC_GOT_TLSLD16_LO:
5790 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5791 {
5792 tls_get_addr_check:
5793 if (rel + 1 < relend)
5794 {
5795 enum elf_ppc_reloc_type r_type2;
5796 unsigned long r_symndx2;
5797 struct elf_link_hash_entry *h2;
5798 bfd_vma insn1, insn2;
5799 bfd_vma offset;
5800
5801 /* The next instruction should be a call to
5802 __tls_get_addr. Peek at the reloc to be sure. */
5803 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5804 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5805 if (r_symndx2 < symtab_hdr->sh_info
5806 || (r_type2 != R_PPC_REL14
5807 && r_type2 != R_PPC_REL14_BRTAKEN
5808 && r_type2 != R_PPC_REL14_BRNTAKEN
5809 && r_type2 != R_PPC_REL24
5810 && r_type2 != R_PPC_PLTREL24))
5811 break;
5812
5813 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5814 while (h2->root.type == bfd_link_hash_indirect
5815 || h2->root.type == bfd_link_hash_warning)
5816 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5817 if (h2 == NULL || h2 != htab->tls_get_addr)
5818 break;
5819
5820 /* OK, it checks out. Replace the call. */
5821 offset = rel[1].r_offset;
5822 insn1 = bfd_get_32 (output_bfd,
5823 contents + rel->r_offset - d_offset);
5824 if ((tls_mask & tls_gd) != 0)
5825 {
5826 /* IE */
5827 insn1 &= (1 << 26) - 1;
5828 insn1 |= 32 << 26; /* lwz */
5829 insn2 = 0x7c631214; /* add 3,3,2 */
5830 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5831 rel[1].r_addend = 0;
5832 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5833 + R_PPC_GOT_TPREL16);
5834 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5835 }
5836 else
5837 {
5838 /* LE */
5839 insn1 = 0x3c620000; /* addis 3,2,0 */
5840 insn2 = 0x38630000; /* addi 3,3,0 */
5841 if (tls_gd == 0)
5842 {
5843 /* Was an LD reloc. */
5844 r_symndx = 0;
5845 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5846 }
5847 r_type = R_PPC_TPREL16_HA;
5848 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5849 rel[1].r_info = ELF32_R_INFO (r_symndx,
5850 R_PPC_TPREL16_LO);
5851 rel[1].r_offset += d_offset;
5852 rel[1].r_addend = rel->r_addend;
5853 }
5854 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5855 bfd_put_32 (output_bfd, insn2, contents + offset);
5856 if (tls_gd == 0)
5857 {
5858 /* We changed the symbol on an LD reloc. Start over
5859 in order to get h, sym, sec etc. right. */
5860 rel--;
5861 continue;
5862 }
5863 }
5864 }
5865 break;
5866 }
5867
5868 /* Handle other relocations that tweak non-addend part of insn. */
5869 branch_bit = 0;
5870 switch (r_type)
5871 {
5872 default:
5873 break;
5874
5875 /* Branch taken prediction relocations. */
5876 case R_PPC_ADDR14_BRTAKEN:
5877 case R_PPC_REL14_BRTAKEN:
5878 branch_bit = BRANCH_PREDICT_BIT;
5879 /* Fall thru */
5880
5881 /* Branch not taken prediction relocations. */
5882 case R_PPC_ADDR14_BRNTAKEN:
5883 case R_PPC_REL14_BRNTAKEN:
5884 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5885 insn &= ~BRANCH_PREDICT_BIT;
5886 insn |= branch_bit;
5887
5888 from = (rel->r_offset
5889 + input_section->output_offset
5890 + input_section->output_section->vma);
5891
5892 /* Invert 'y' bit if not the default. */
5893 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5894 insn ^= BRANCH_PREDICT_BIT;
5895
5896 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5897 break;
5898 }
5899
5900 addend = rel->r_addend;
5901 tls_type = 0;
5902 howto = NULL;
5903 if (r_type < R_PPC_max)
5904 howto = ppc_elf_howto_table[r_type];
5905 switch (r_type)
5906 {
5907 default:
5908 (*_bfd_error_handler)
5909 (_("%B: unknown relocation type %d for symbol %s"),
5910 input_bfd, (int) r_type, sym_name);
5911
5912 bfd_set_error (bfd_error_bad_value);
5913 ret = FALSE;
5914 continue;
5915
5916 case R_PPC_NONE:
5917 case R_PPC_TLS:
5918 case R_PPC_EMB_MRKREF:
5919 case R_PPC_GNU_VTINHERIT:
5920 case R_PPC_GNU_VTENTRY:
5921 continue;
5922
5923 /* GOT16 relocations. Like an ADDR16 using the symbol's
5924 address in the GOT as relocation value instead of the
5925 symbol's value itself. Also, create a GOT entry for the
5926 symbol and put the symbol value there. */
5927 case R_PPC_GOT_TLSGD16:
5928 case R_PPC_GOT_TLSGD16_LO:
5929 case R_PPC_GOT_TLSGD16_HI:
5930 case R_PPC_GOT_TLSGD16_HA:
5931 tls_type = TLS_TLS | TLS_GD;
5932 goto dogot;
5933
5934 case R_PPC_GOT_TLSLD16:
5935 case R_PPC_GOT_TLSLD16_LO:
5936 case R_PPC_GOT_TLSLD16_HI:
5937 case R_PPC_GOT_TLSLD16_HA:
5938 tls_type = TLS_TLS | TLS_LD;
5939 goto dogot;
5940
5941 case R_PPC_GOT_TPREL16:
5942 case R_PPC_GOT_TPREL16_LO:
5943 case R_PPC_GOT_TPREL16_HI:
5944 case R_PPC_GOT_TPREL16_HA:
5945 tls_type = TLS_TLS | TLS_TPREL;
5946 goto dogot;
5947
5948 case R_PPC_GOT_DTPREL16:
5949 case R_PPC_GOT_DTPREL16_LO:
5950 case R_PPC_GOT_DTPREL16_HI:
5951 case R_PPC_GOT_DTPREL16_HA:
5952 tls_type = TLS_TLS | TLS_DTPREL;
5953 goto dogot;
5954
5955 case R_PPC_GOT16:
5956 case R_PPC_GOT16_LO:
5957 case R_PPC_GOT16_HI:
5958 case R_PPC_GOT16_HA:
5959 dogot:
5960 {
5961 /* Relocation is to the entry for this symbol in the global
5962 offset table. */
5963 bfd_vma off;
5964 bfd_vma *offp;
5965 unsigned long indx;
5966
5967 if (htab->got == NULL)
5968 abort ();
5969
5970 indx = 0;
5971 if (tls_type == (TLS_TLS | TLS_LD)
5972 && (h == NULL
5973 || !h->def_dynamic))
5974 offp = &htab->tlsld_got.offset;
5975 else if (h != NULL)
5976 {
5977 bfd_boolean dyn;
5978 dyn = htab->elf.dynamic_sections_created;
5979 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5980 || (info->shared
5981 && SYMBOL_REFERENCES_LOCAL (info, h)))
5982 /* This is actually a static link, or it is a
5983 -Bsymbolic link and the symbol is defined
5984 locally, or the symbol was forced to be local
5985 because of a version file. */
5986 ;
5987 else
5988 {
5989 indx = h->dynindx;
5990 unresolved_reloc = FALSE;
5991 }
5992 offp = &h->got.offset;
5993 }
5994 else
5995 {
5996 if (local_got_offsets == NULL)
5997 abort ();
5998 offp = &local_got_offsets[r_symndx];
5999 }
6000
6001 /* The offset must always be a multiple of 4. We use the
6002 least significant bit to record whether we have already
6003 processed this entry. */
6004 off = *offp;
6005 if ((off & 1) != 0)
6006 off &= ~1;
6007 else
6008 {
6009 unsigned int tls_m = (tls_mask
6010 & (TLS_LD | TLS_GD | TLS_DTPREL
6011 | TLS_TPREL | TLS_TPRELGD));
6012
6013 if (offp == &htab->tlsld_got.offset)
6014 tls_m = TLS_LD;
6015 else if (h == NULL
6016 || !h->def_dynamic)
6017 tls_m &= ~TLS_LD;
6018
6019 /* We might have multiple got entries for this sym.
6020 Initialize them all. */
6021 do
6022 {
6023 int tls_ty = 0;
6024
6025 if ((tls_m & TLS_LD) != 0)
6026 {
6027 tls_ty = TLS_TLS | TLS_LD;
6028 tls_m &= ~TLS_LD;
6029 }
6030 else if ((tls_m & TLS_GD) != 0)
6031 {
6032 tls_ty = TLS_TLS | TLS_GD;
6033 tls_m &= ~TLS_GD;
6034 }
6035 else if ((tls_m & TLS_DTPREL) != 0)
6036 {
6037 tls_ty = TLS_TLS | TLS_DTPREL;
6038 tls_m &= ~TLS_DTPREL;
6039 }
6040 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6041 {
6042 tls_ty = TLS_TLS | TLS_TPREL;
6043 tls_m = 0;
6044 }
6045
6046 /* Generate relocs for the dynamic linker. */
6047 if ((info->shared || indx != 0)
6048 && (h == NULL
6049 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6050 || h->root.type != bfd_link_hash_undefweak))
6051 {
6052 outrel.r_offset = (htab->got->output_section->vma
6053 + htab->got->output_offset
6054 + off);
6055 outrel.r_addend = 0;
6056 if (tls_ty & (TLS_LD | TLS_GD))
6057 {
6058 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6059 if (tls_ty == (TLS_TLS | TLS_GD))
6060 {
6061 loc = htab->relgot->contents;
6062 loc += (htab->relgot->reloc_count++
6063 * sizeof (Elf32_External_Rela));
6064 bfd_elf32_swap_reloca_out (output_bfd,
6065 &outrel, loc);
6066 outrel.r_offset += 4;
6067 outrel.r_info
6068 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6069 }
6070 }
6071 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6072 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6073 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6074 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6075 else if (indx == 0)
6076 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6077 else
6078 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6079 if (indx == 0)
6080 {
6081 outrel.r_addend += relocation;
6082 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6083 outrel.r_addend -= htab->elf.tls_sec->vma;
6084 }
6085 loc = htab->relgot->contents;
6086 loc += (htab->relgot->reloc_count++
6087 * sizeof (Elf32_External_Rela));
6088 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6089 }
6090
6091 /* Init the .got section contents if we're not
6092 emitting a reloc. */
6093 else
6094 {
6095 bfd_vma value = relocation;
6096
6097 if (tls_ty == (TLS_TLS | TLS_LD))
6098 value = 1;
6099 else if (tls_ty != 0)
6100 {
6101 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6102 if (tls_ty == (TLS_TLS | TLS_TPREL))
6103 value += DTP_OFFSET - TP_OFFSET;
6104
6105 if (tls_ty == (TLS_TLS | TLS_GD))
6106 {
6107 bfd_put_32 (output_bfd, value,
6108 htab->got->contents + off + 4);
6109 value = 1;
6110 }
6111 }
6112 bfd_put_32 (output_bfd, value,
6113 htab->got->contents + off);
6114 }
6115
6116 off += 4;
6117 if (tls_ty & (TLS_LD | TLS_GD))
6118 off += 4;
6119 }
6120 while (tls_m != 0);
6121
6122 off = *offp;
6123 *offp = off | 1;
6124 }
6125
6126 if (off >= (bfd_vma) -2)
6127 abort ();
6128
6129 if ((tls_type & TLS_TLS) != 0)
6130 {
6131 if (tls_type != (TLS_TLS | TLS_LD))
6132 {
6133 if ((tls_mask & TLS_LD) != 0
6134 && !(h == NULL
6135 || !h->def_dynamic))
6136 off += 8;
6137 if (tls_type != (TLS_TLS | TLS_GD))
6138 {
6139 if ((tls_mask & TLS_GD) != 0)
6140 off += 8;
6141 if (tls_type != (TLS_TLS | TLS_DTPREL))
6142 {
6143 if ((tls_mask & TLS_DTPREL) != 0)
6144 off += 4;
6145 }
6146 }
6147 }
6148 }
6149
6150 relocation = htab->got->output_offset + off;
6151 relocation -= htab->elf.hgot->root.u.def.value;
6152
6153 /* Addends on got relocations don't make much sense.
6154 x+off@got is actually x@got+off, and since the got is
6155 generated by a hash table traversal, the value in the
6156 got at entry m+n bears little relation to the entry m. */
6157 if (addend != 0)
6158 (*_bfd_error_handler)
6159 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6160 input_bfd,
6161 input_section,
6162 (long) rel->r_offset,
6163 howto->name,
6164 sym_name);
6165 }
6166 break;
6167
6168 /* Relocations that need no special processing. */
6169 case R_PPC_LOCAL24PC:
6170 /* It makes no sense to point a local relocation
6171 at a symbol not in this object. */
6172 if (unresolved_reloc)
6173 {
6174 if (! (*info->callbacks->undefined_symbol) (info,
6175 h->root.root.string,
6176 input_bfd,
6177 input_section,
6178 rel->r_offset,
6179 TRUE))
6180 return FALSE;
6181 continue;
6182 }
6183 break;
6184
6185 case R_PPC_DTPREL16:
6186 case R_PPC_DTPREL16_LO:
6187 case R_PPC_DTPREL16_HI:
6188 case R_PPC_DTPREL16_HA:
6189 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6190 break;
6191
6192 /* Relocations that may need to be propagated if this is a shared
6193 object. */
6194 case R_PPC_TPREL16:
6195 case R_PPC_TPREL16_LO:
6196 case R_PPC_TPREL16_HI:
6197 case R_PPC_TPREL16_HA:
6198 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6199 /* The TPREL16 relocs shouldn't really be used in shared
6200 libs as they will result in DT_TEXTREL being set, but
6201 support them anyway. */
6202 goto dodyn;
6203
6204 case R_PPC_TPREL32:
6205 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6206 goto dodyn;
6207
6208 case R_PPC_DTPREL32:
6209 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6210 goto dodyn;
6211
6212 case R_PPC_DTPMOD32:
6213 relocation = 1;
6214 addend = 0;
6215 goto dodyn;
6216
6217 case R_PPC_REL16:
6218 case R_PPC_REL16_LO:
6219 case R_PPC_REL16_HI:
6220 case R_PPC_REL16_HA:
6221 break;
6222
6223 case R_PPC_REL24:
6224 case R_PPC_REL32:
6225 case R_PPC_REL14:
6226 case R_PPC_REL14_BRTAKEN:
6227 case R_PPC_REL14_BRNTAKEN:
6228 /* If these relocations are not to a named symbol, they can be
6229 handled right here, no need to bother the dynamic linker. */
6230 if (SYMBOL_REFERENCES_LOCAL (info, h)
6231 || h == htab->elf.hgot)
6232 break;
6233 /* fall through */
6234
6235 /* Relocations that always need to be propagated if this is a shared
6236 object. */
6237 case R_PPC_ADDR32:
6238 case R_PPC_ADDR24:
6239 case R_PPC_ADDR16:
6240 case R_PPC_ADDR16_LO:
6241 case R_PPC_ADDR16_HI:
6242 case R_PPC_ADDR16_HA:
6243 case R_PPC_ADDR14:
6244 case R_PPC_ADDR14_BRTAKEN:
6245 case R_PPC_ADDR14_BRNTAKEN:
6246 case R_PPC_UADDR32:
6247 case R_PPC_UADDR16:
6248 dodyn:
6249 if ((input_section->flags & SEC_ALLOC) == 0)
6250 break;
6251 /* Fall thru. */
6252
6253 if ((info->shared
6254 && (h == NULL
6255 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6256 || h->root.type != bfd_link_hash_undefweak)
6257 && (MUST_BE_DYN_RELOC (r_type)
6258 || !SYMBOL_CALLS_LOCAL (info, h)))
6259 || (ELIMINATE_COPY_RELOCS
6260 && !info->shared
6261 && h != NULL
6262 && h->dynindx != -1
6263 && !h->non_got_ref
6264 && h->def_dynamic
6265 && !h->def_regular))
6266 {
6267 int skip;
6268
6269 #ifdef DEBUG
6270 fprintf (stderr, "ppc_elf_relocate_section needs to "
6271 "create relocation for %s\n",
6272 (h && h->root.root.string
6273 ? h->root.root.string : "<unknown>"));
6274 #endif
6275
6276 /* When generating a shared object, these relocations
6277 are copied into the output file to be resolved at run
6278 time. */
6279 if (sreloc == NULL)
6280 {
6281 const char *name;
6282
6283 name = (bfd_elf_string_from_elf_section
6284 (input_bfd,
6285 elf_elfheader (input_bfd)->e_shstrndx,
6286 elf_section_data (input_section)->rel_hdr.sh_name));
6287 if (name == NULL)
6288 return FALSE;
6289
6290 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6291 && strcmp (bfd_get_section_name (input_bfd,
6292 input_section),
6293 name + 5) == 0);
6294
6295 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6296 BFD_ASSERT (sreloc != NULL);
6297 }
6298
6299 skip = 0;
6300
6301 outrel.r_offset =
6302 _bfd_elf_section_offset (output_bfd, info, input_section,
6303 rel->r_offset);
6304 if (outrel.r_offset == (bfd_vma) -1
6305 || outrel.r_offset == (bfd_vma) -2)
6306 skip = (int) outrel.r_offset;
6307 outrel.r_offset += (input_section->output_section->vma
6308 + input_section->output_offset);
6309
6310 if (skip)
6311 memset (&outrel, 0, sizeof outrel);
6312 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6313 {
6314 unresolved_reloc = FALSE;
6315 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6316 outrel.r_addend = rel->r_addend;
6317 }
6318 else
6319 {
6320 outrel.r_addend = relocation + rel->r_addend;
6321
6322 if (r_type == R_PPC_ADDR32)
6323 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6324 else
6325 {
6326 long indx;
6327
6328 if (bfd_is_abs_section (sec))
6329 indx = 0;
6330 else if (sec == NULL || sec->owner == NULL)
6331 {
6332 bfd_set_error (bfd_error_bad_value);
6333 return FALSE;
6334 }
6335 else
6336 {
6337 asection *osec;
6338
6339 /* We are turning this relocation into one
6340 against a section symbol. It would be
6341 proper to subtract the symbol's value,
6342 osec->vma, from the emitted reloc addend,
6343 but ld.so expects buggy relocs. */
6344 osec = sec->output_section;
6345 indx = elf_section_data (osec)->dynindx;
6346 if (indx == 0)
6347 {
6348 osec = htab->elf.text_index_section;
6349 indx = elf_section_data (osec)->dynindx;
6350 }
6351 BFD_ASSERT (indx != 0);
6352 #ifdef DEBUG
6353 if (indx == 0)
6354 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6355 indx, osec->name, osec->flags,
6356 h->root.root.string);
6357 #endif
6358 }
6359
6360 outrel.r_info = ELF32_R_INFO (indx, r_type);
6361 }
6362 }
6363
6364 loc = sreloc->contents;
6365 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6366 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6367
6368 if (skip == -1)
6369 continue;
6370
6371 /* This reloc will be computed at runtime. We clear the memory
6372 so that it contains predictable value. */
6373 if (! skip
6374 && ((input_section->flags & SEC_ALLOC) != 0
6375 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6376 {
6377 relocation = howto->pc_relative ? outrel.r_offset : 0;
6378 addend = 0;
6379 break;
6380 }
6381 }
6382 break;
6383
6384 case R_PPC_RELAX32PC_PLT:
6385 case R_PPC_RELAX32_PLT:
6386 {
6387 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6388
6389 if (htab->plt_type == PLT_NEW)
6390 relocation = (htab->glink->output_section->vma
6391 + htab->glink->output_offset
6392 + ent->glink_offset);
6393 else
6394 relocation = (htab->plt->output_section->vma
6395 + htab->plt->output_offset
6396 + ent->plt.offset);
6397 addend = 0;
6398 }
6399 if (r_type == R_PPC_RELAX32_PLT)
6400 goto relax32;
6401 /* Fall thru */
6402
6403 case R_PPC_RELAX32PC:
6404 relocation -= (input_section->output_section->vma
6405 + input_section->output_offset
6406 + rel->r_offset - 4);
6407 /* Fall thru */
6408
6409 case R_PPC_RELAX32:
6410 relax32:
6411 {
6412 unsigned long t0;
6413 unsigned long t1;
6414
6415 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6416 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6417
6418 /* We're clearing the bits for R_PPC_ADDR16_HA
6419 and R_PPC_ADDR16_LO here. */
6420 t0 &= ~0xffff;
6421 t1 &= ~0xffff;
6422
6423 /* t0 is HA, t1 is LO */
6424 relocation += addend;
6425 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6426 t1 |= relocation & 0xffff;
6427
6428 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6429 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6430 }
6431 continue;
6432
6433 /* Indirect .sdata relocation. */
6434 case R_PPC_EMB_SDAI16:
6435 BFD_ASSERT (htab->sdata[0].section != NULL);
6436 relocation
6437 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6438 h, relocation, rel);
6439 break;
6440
6441 /* Indirect .sdata2 relocation. */
6442 case R_PPC_EMB_SDA2I16:
6443 BFD_ASSERT (htab->sdata[1].section != NULL);
6444 relocation
6445 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6446 h, relocation, rel);
6447 break;
6448
6449 /* Handle the TOC16 reloc. We want to use the offset within the .got
6450 section, not the actual VMA. This is appropriate when generating
6451 an embedded ELF object, for which the .got section acts like the
6452 AIX .toc section. */
6453 case R_PPC_TOC16: /* phony GOT16 relocations */
6454 BFD_ASSERT (sec != NULL);
6455 BFD_ASSERT (bfd_is_und_section (sec)
6456 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6457 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6458
6459 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6460 break;
6461
6462 case R_PPC_PLTREL24:
6463 /* Relocation is to the entry for this symbol in the
6464 procedure linkage table. */
6465 {
6466 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6467
6468 addend = 0;
6469 if (ent == NULL
6470 || htab->plt == NULL)
6471 {
6472 /* We didn't make a PLT entry for this symbol. This
6473 happens when statically linking PIC code, or when
6474 using -Bsymbolic. */
6475 break;
6476 }
6477
6478 unresolved_reloc = FALSE;
6479 if (htab->plt_type == PLT_NEW)
6480 relocation = (htab->glink->output_section->vma
6481 + htab->glink->output_offset
6482 + ent->glink_offset);
6483 else
6484 relocation = (htab->plt->output_section->vma
6485 + htab->plt->output_offset
6486 + ent->plt.offset);
6487 }
6488 break;
6489
6490 /* Relocate against _SDA_BASE_. */
6491 case R_PPC_SDAREL16:
6492 {
6493 const char *name;
6494 struct elf_link_hash_entry *sh;
6495
6496 BFD_ASSERT (sec != NULL);
6497 name = bfd_get_section_name (abfd, sec->output_section);
6498 if (! ((CONST_STRNEQ (name, ".sdata")
6499 && (name[6] == 0 || name[6] == '.'))
6500 || (CONST_STRNEQ (name, ".sbss")
6501 && (name[5] == 0 || name[5] == '.'))))
6502 {
6503 (*_bfd_error_handler)
6504 (_("%B: the target (%s) of a %s relocation is "
6505 "in the wrong output section (%s)"),
6506 input_bfd,
6507 sym_name,
6508 howto->name,
6509 name);
6510 }
6511 sh = htab->sdata[0].sym;
6512 addend -= (sh->root.u.def.value
6513 + sh->root.u.def.section->output_offset
6514 + sh->root.u.def.section->output_section->vma);
6515 }
6516 break;
6517
6518 /* Relocate against _SDA2_BASE_. */
6519 case R_PPC_EMB_SDA2REL:
6520 {
6521 const char *name;
6522 struct elf_link_hash_entry *sh;
6523
6524 BFD_ASSERT (sec != NULL);
6525 name = bfd_get_section_name (abfd, sec->output_section);
6526 if (! (CONST_STRNEQ (name, ".sdata2")
6527 || CONST_STRNEQ (name, ".sbss2")))
6528 {
6529 (*_bfd_error_handler)
6530 (_("%B: the target (%s) of a %s relocation is "
6531 "in the wrong output section (%s)"),
6532 input_bfd,
6533 sym_name,
6534 howto->name,
6535 name);
6536
6537 bfd_set_error (bfd_error_bad_value);
6538 ret = FALSE;
6539 continue;
6540 }
6541 sh = htab->sdata[1].sym;
6542 addend -= (sh->root.u.def.value
6543 + sh->root.u.def.section->output_offset
6544 + sh->root.u.def.section->output_section->vma);
6545 }
6546 break;
6547
6548 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6549 case R_PPC_EMB_SDA21:
6550 case R_PPC_EMB_RELSDA:
6551 {
6552 const char *name;
6553 int reg;
6554 struct elf_link_hash_entry *sh;
6555
6556 BFD_ASSERT (sec != NULL);
6557 name = bfd_get_section_name (abfd, sec->output_section);
6558 if (((CONST_STRNEQ (name, ".sdata")
6559 && (name[6] == 0 || name[6] == '.'))
6560 || (CONST_STRNEQ (name, ".sbss")
6561 && (name[5] == 0 || name[5] == '.'))))
6562 {
6563 reg = 13;
6564 sh = htab->sdata[0].sym;
6565 addend -= (sh->root.u.def.value
6566 + sh->root.u.def.section->output_offset
6567 + sh->root.u.def.section->output_section->vma);
6568 }
6569
6570 else if (CONST_STRNEQ (name, ".sdata2")
6571 || CONST_STRNEQ (name, ".sbss2"))
6572 {
6573 reg = 2;
6574 sh = htab->sdata[1].sym;
6575 addend -= (sh->root.u.def.value
6576 + sh->root.u.def.section->output_offset
6577 + sh->root.u.def.section->output_section->vma);
6578 }
6579
6580 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6581 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6582 {
6583 reg = 0;
6584 }
6585
6586 else
6587 {
6588 (*_bfd_error_handler)
6589 (_("%B: the target (%s) of a %s relocation is "
6590 "in the wrong output section (%s)"),
6591 input_bfd,
6592 sym_name,
6593 howto->name,
6594 name);
6595
6596 bfd_set_error (bfd_error_bad_value);
6597 ret = FALSE;
6598 continue;
6599 }
6600
6601 if (r_type == R_PPC_EMB_SDA21)
6602 { /* fill in register field */
6603 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6604 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6605 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6606 }
6607 }
6608 break;
6609
6610 /* Relocate against the beginning of the section. */
6611 case R_PPC_SECTOFF:
6612 case R_PPC_SECTOFF_LO:
6613 case R_PPC_SECTOFF_HI:
6614 case R_PPC_SECTOFF_HA:
6615 BFD_ASSERT (sec != NULL);
6616 addend -= sec->output_section->vma;
6617 break;
6618
6619 /* Negative relocations. */
6620 case R_PPC_EMB_NADDR32:
6621 case R_PPC_EMB_NADDR16:
6622 case R_PPC_EMB_NADDR16_LO:
6623 case R_PPC_EMB_NADDR16_HI:
6624 case R_PPC_EMB_NADDR16_HA:
6625 addend -= 2 * relocation;
6626 break;
6627
6628 case R_PPC_COPY:
6629 case R_PPC_GLOB_DAT:
6630 case R_PPC_JMP_SLOT:
6631 case R_PPC_RELATIVE:
6632 case R_PPC_PLT32:
6633 case R_PPC_PLTREL32:
6634 case R_PPC_PLT16_LO:
6635 case R_PPC_PLT16_HI:
6636 case R_PPC_PLT16_HA:
6637 case R_PPC_ADDR30:
6638 case R_PPC_EMB_RELSEC16:
6639 case R_PPC_EMB_RELST_LO:
6640 case R_PPC_EMB_RELST_HI:
6641 case R_PPC_EMB_RELST_HA:
6642 case R_PPC_EMB_BIT_FLD:
6643 (*_bfd_error_handler)
6644 (_("%B: relocation %s is not yet supported for symbol %s."),
6645 input_bfd,
6646 howto->name,
6647 sym_name);
6648
6649 bfd_set_error (bfd_error_invalid_operation);
6650 ret = FALSE;
6651 continue;
6652 }
6653
6654 /* Do any further special processing. */
6655 switch (r_type)
6656 {
6657 default:
6658 break;
6659
6660 case R_PPC_ADDR16_HA:
6661 case R_PPC_REL16_HA:
6662 case R_PPC_SECTOFF_HA:
6663 case R_PPC_TPREL16_HA:
6664 case R_PPC_DTPREL16_HA:
6665 case R_PPC_EMB_NADDR16_HA:
6666 case R_PPC_EMB_RELST_HA:
6667 /* It's just possible that this symbol is a weak symbol
6668 that's not actually defined anywhere. In that case,
6669 'sec' would be NULL, and we should leave the symbol
6670 alone (it will be set to zero elsewhere in the link). */
6671 if (sec == NULL)
6672 break;
6673 /* Fall thru */
6674
6675 case R_PPC_PLT16_HA:
6676 case R_PPC_GOT16_HA:
6677 case R_PPC_GOT_TLSGD16_HA:
6678 case R_PPC_GOT_TLSLD16_HA:
6679 case R_PPC_GOT_TPREL16_HA:
6680 case R_PPC_GOT_DTPREL16_HA:
6681 /* Add 0x10000 if sign bit in 0:15 is set.
6682 Bits 0:15 are not used. */
6683 addend += 0x8000;
6684 break;
6685 }
6686
6687 #ifdef DEBUG
6688 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6689 "offset = %ld, addend = %ld\n",
6690 howto->name,
6691 (int) r_type,
6692 sym_name,
6693 r_symndx,
6694 (long) rel->r_offset,
6695 (long) addend);
6696 #endif
6697
6698 if (unresolved_reloc
6699 && !((input_section->flags & SEC_DEBUGGING) != 0
6700 && h->def_dynamic))
6701 {
6702 (*_bfd_error_handler)
6703 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6704 input_bfd,
6705 input_section,
6706 (long) rel->r_offset,
6707 howto->name,
6708 sym_name);
6709 ret = FALSE;
6710 }
6711
6712 r = _bfd_final_link_relocate (howto,
6713 input_bfd,
6714 input_section,
6715 contents,
6716 rel->r_offset,
6717 relocation,
6718 addend);
6719
6720 if (r != bfd_reloc_ok)
6721 {
6722 if (r == bfd_reloc_overflow)
6723 {
6724 if (warned)
6725 continue;
6726 if (h != NULL
6727 && h->root.type == bfd_link_hash_undefweak
6728 && howto->pc_relative)
6729 {
6730 /* Assume this is a call protected by other code that
6731 detect the symbol is undefined. If this is the case,
6732 we can safely ignore the overflow. If not, the
6733 program is hosed anyway, and a little warning isn't
6734 going to help. */
6735
6736 continue;
6737 }
6738
6739 if (! (*info->callbacks->reloc_overflow) (info,
6740 (h ? &h->root : NULL),
6741 sym_name,
6742 howto->name,
6743 rel->r_addend,
6744 input_bfd,
6745 input_section,
6746 rel->r_offset))
6747 return FALSE;
6748 }
6749 else
6750 {
6751 (*_bfd_error_handler)
6752 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6753 input_bfd, input_section,
6754 (long) rel->r_offset, howto->name, sym_name, (int) r);
6755 ret = FALSE;
6756 }
6757 }
6758 }
6759
6760 #ifdef DEBUG
6761 fprintf (stderr, "\n");
6762 #endif
6763
6764 return ret;
6765 }
6766 \f
6767 #define PPC_LO(v) ((v) & 0xffff)
6768 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6769 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6770
6771 /* Finish up dynamic symbol handling. We set the contents of various
6772 dynamic sections here. */
6773
6774 static bfd_boolean
6775 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6776 struct bfd_link_info *info,
6777 struct elf_link_hash_entry *h,
6778 Elf_Internal_Sym *sym)
6779 {
6780 struct ppc_elf_link_hash_table *htab;
6781 struct plt_entry *ent;
6782 bfd_boolean doneone;
6783
6784 #ifdef DEBUG
6785 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6786 h->root.root.string);
6787 #endif
6788
6789 htab = ppc_elf_hash_table (info);
6790 BFD_ASSERT (htab->elf.dynobj != NULL);
6791
6792 doneone = FALSE;
6793 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6794 if (ent->plt.offset != (bfd_vma) -1)
6795 {
6796 if (!doneone)
6797 {
6798 Elf_Internal_Rela rela;
6799 bfd_byte *loc;
6800 bfd_vma reloc_index;
6801
6802 if (htab->plt_type == PLT_NEW)
6803 reloc_index = ent->plt.offset / 4;
6804 else
6805 {
6806 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6807 / htab->plt_slot_size);
6808 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6809 && htab->plt_type == PLT_OLD)
6810 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6811 }
6812
6813 /* This symbol has an entry in the procedure linkage table.
6814 Set it up. */
6815 if (htab->plt_type == PLT_VXWORKS)
6816 {
6817 bfd_vma got_offset;
6818 const bfd_vma *plt_entry;
6819
6820 /* The first three entries in .got.plt are reserved. */
6821 got_offset = (reloc_index + 3) * 4;
6822
6823 /* Use the right PLT. */
6824 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6825 : ppc_elf_vxworks_plt_entry;
6826
6827 /* Fill in the .plt on VxWorks. */
6828 if (info->shared)
6829 {
6830 bfd_vma got_offset_hi = (got_offset >> 16)
6831 + ((got_offset & 0x8000) >> 15);
6832
6833 bfd_put_32 (output_bfd,
6834 plt_entry[0] | (got_offset_hi & 0xffff),
6835 htab->plt->contents + ent->plt.offset + 0);
6836 bfd_put_32 (output_bfd,
6837 plt_entry[1] | (got_offset & 0xffff),
6838 htab->plt->contents + ent->plt.offset + 4);
6839 }
6840 else
6841 {
6842 bfd_vma got_loc
6843 = (got_offset
6844 + htab->elf.hgot->root.u.def.value
6845 + htab->elf.hgot->root.u.def.section->output_offset
6846 + htab->elf.hgot->root.u.def.section->output_section->vma);
6847 bfd_vma got_loc_hi = (got_loc >> 16)
6848 + ((got_loc & 0x8000) >> 15);
6849
6850 bfd_put_32 (output_bfd,
6851 plt_entry[0] | (got_loc_hi & 0xffff),
6852 htab->plt->contents + ent->plt.offset + 0);
6853 bfd_put_32 (output_bfd,
6854 plt_entry[1] | (got_loc & 0xffff),
6855 htab->plt->contents + ent->plt.offset + 4);
6856 }
6857
6858 bfd_put_32 (output_bfd, plt_entry[2],
6859 htab->plt->contents + ent->plt.offset + 8);
6860 bfd_put_32 (output_bfd, plt_entry[3],
6861 htab->plt->contents + ent->plt.offset + 12);
6862
6863 /* This instruction is an immediate load. The value loaded is
6864 the byte offset of the R_PPC_JMP_SLOT relocation from the
6865 start of the .rela.plt section. The value is stored in the
6866 low-order 16 bits of the load instruction. */
6867 /* NOTE: It appears that this is now an index rather than a
6868 prescaled offset. */
6869 bfd_put_32 (output_bfd,
6870 plt_entry[4] | reloc_index,
6871 htab->plt->contents + ent->plt.offset + 16);
6872 /* This instruction is a PC-relative branch whose target is
6873 the start of the PLT section. The address of this branch
6874 instruction is 20 bytes beyond the start of this PLT entry.
6875 The address is encoded in bits 6-29, inclusive. The value
6876 stored is right-shifted by two bits, permitting a 26-bit
6877 offset. */
6878 bfd_put_32 (output_bfd,
6879 (plt_entry[5]
6880 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6881 htab->plt->contents + ent->plt.offset + 20);
6882 bfd_put_32 (output_bfd, plt_entry[6],
6883 htab->plt->contents + ent->plt.offset + 24);
6884 bfd_put_32 (output_bfd, plt_entry[7],
6885 htab->plt->contents + ent->plt.offset + 28);
6886
6887 /* Fill in the GOT entry corresponding to this PLT slot with
6888 the address immediately after the the "bctr" instruction
6889 in this PLT entry. */
6890 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6891 + htab->plt->output_offset
6892 + ent->plt.offset + 16),
6893 htab->sgotplt->contents + got_offset);
6894
6895 if (!info->shared)
6896 {
6897 /* Fill in a couple of entries in .rela.plt.unloaded. */
6898 loc = htab->srelplt2->contents
6899 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6900 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6901 * sizeof (Elf32_External_Rela));
6902
6903 /* Provide the @ha relocation for the first instruction. */
6904 rela.r_offset = (htab->plt->output_section->vma
6905 + htab->plt->output_offset
6906 + ent->plt.offset + 2);
6907 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6908 R_PPC_ADDR16_HA);
6909 rela.r_addend = got_offset;
6910 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6911 loc += sizeof (Elf32_External_Rela);
6912
6913 /* Provide the @l relocation for the second instruction. */
6914 rela.r_offset = (htab->plt->output_section->vma
6915 + htab->plt->output_offset
6916 + ent->plt.offset + 6);
6917 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6918 R_PPC_ADDR16_LO);
6919 rela.r_addend = got_offset;
6920 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6921 loc += sizeof (Elf32_External_Rela);
6922
6923 /* Provide a relocation for the GOT entry corresponding to this
6924 PLT slot. Point it at the middle of the .plt entry. */
6925 rela.r_offset = (htab->sgotplt->output_section->vma
6926 + htab->sgotplt->output_offset
6927 + got_offset);
6928 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6929 R_PPC_ADDR32);
6930 rela.r_addend = ent->plt.offset + 16;
6931 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6932 }
6933
6934 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6935 In particular, the offset for the relocation is not the
6936 address of the PLT entry for this function, as specified
6937 by the ABI. Instead, the offset is set to the address of
6938 the GOT slot for this function. See EABI 4.4.4.1. */
6939 rela.r_offset = (htab->sgotplt->output_section->vma
6940 + htab->sgotplt->output_offset
6941 + got_offset);
6942
6943 }
6944 else
6945 {
6946 rela.r_offset = (htab->plt->output_section->vma
6947 + htab->plt->output_offset
6948 + ent->plt.offset);
6949 if (htab->plt_type == PLT_OLD)
6950 {
6951 /* We don't need to fill in the .plt. The ppc dynamic
6952 linker will fill it in. */
6953 }
6954 else
6955 {
6956 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6957 + htab->glink->output_section->vma
6958 + htab->glink->output_offset);
6959 bfd_put_32 (output_bfd, val,
6960 htab->plt->contents + ent->plt.offset);
6961 }
6962 }
6963
6964 /* Fill in the entry in the .rela.plt section. */
6965 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6966 rela.r_addend = 0;
6967
6968 loc = (htab->relplt->contents
6969 + reloc_index * sizeof (Elf32_External_Rela));
6970 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6971
6972 if (!h->def_regular)
6973 {
6974 /* Mark the symbol as undefined, rather than as defined in
6975 the .plt section. Leave the value alone. */
6976 sym->st_shndx = SHN_UNDEF;
6977 /* If the symbol is weak, we do need to clear the value.
6978 Otherwise, the PLT entry would provide a definition for
6979 the symbol even if the symbol wasn't defined anywhere,
6980 and so the symbol would never be NULL. */
6981 if (!h->ref_regular_nonweak)
6982 sym->st_value = 0;
6983 }
6984 doneone = TRUE;
6985 }
6986
6987 if (htab->plt_type == PLT_NEW)
6988 {
6989 bfd_vma plt;
6990 unsigned char *p;
6991
6992 plt = (ent->plt.offset
6993 + htab->plt->output_section->vma
6994 + htab->plt->output_offset);
6995 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6996
6997 if (info->shared || info->pie)
6998 {
6999 bfd_vma got = 0;
7000
7001 if (ent->addend >= 32768)
7002 got = (ent->addend
7003 + ent->sec->output_section->vma
7004 + ent->sec->output_offset);
7005 else if (htab->elf.hgot != NULL)
7006 got = (htab->elf.hgot->root.u.def.value
7007 + htab->elf.hgot->root.u.def.section->output_section->vma
7008 + htab->elf.hgot->root.u.def.section->output_offset);
7009
7010 plt -= got;
7011
7012 if (plt + 0x8000 < 0x10000)
7013 {
7014 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7015 p += 4;
7016 bfd_put_32 (output_bfd, MTCTR_11, p);
7017 p += 4;
7018 bfd_put_32 (output_bfd, BCTR, p);
7019 p += 4;
7020 bfd_put_32 (output_bfd, NOP, p);
7021 p += 4;
7022 }
7023 else
7024 {
7025 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7026 p += 4;
7027 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7028 p += 4;
7029 bfd_put_32 (output_bfd, MTCTR_11, p);
7030 p += 4;
7031 bfd_put_32 (output_bfd, BCTR, p);
7032 p += 4;
7033 }
7034 }
7035 else
7036 {
7037 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7038 p += 4;
7039 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7040 p += 4;
7041 bfd_put_32 (output_bfd, MTCTR_11, p);
7042 p += 4;
7043 bfd_put_32 (output_bfd, BCTR, p);
7044 p += 4;
7045
7046 /* We only need one non-PIC glink stub. */
7047 break;
7048 }
7049 }
7050 else
7051 break;
7052 }
7053
7054 if (h->needs_copy)
7055 {
7056 asection *s;
7057 Elf_Internal_Rela rela;
7058 bfd_byte *loc;
7059
7060 /* This symbols needs a copy reloc. Set it up. */
7061
7062 #ifdef DEBUG
7063 fprintf (stderr, ", copy");
7064 #endif
7065
7066 BFD_ASSERT (h->dynindx != -1);
7067
7068 if (ppc_elf_hash_entry (h)->has_sda_refs)
7069 s = htab->relsbss;
7070 else
7071 s = htab->relbss;
7072 BFD_ASSERT (s != NULL);
7073
7074 rela.r_offset = (h->root.u.def.value
7075 + h->root.u.def.section->output_section->vma
7076 + h->root.u.def.section->output_offset);
7077 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7078 rela.r_addend = 0;
7079 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7080 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7081 }
7082
7083 #ifdef DEBUG
7084 fprintf (stderr, "\n");
7085 #endif
7086
7087 /* Mark some specially defined symbols as absolute. */
7088 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7089 || (!htab->is_vxworks
7090 && (h == htab->elf.hgot
7091 || strcmp (h->root.root.string,
7092 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7093 sym->st_shndx = SHN_ABS;
7094
7095 return TRUE;
7096 }
7097 \f
7098 static enum elf_reloc_type_class
7099 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7100 {
7101 switch (ELF32_R_TYPE (rela->r_info))
7102 {
7103 case R_PPC_RELATIVE:
7104 return reloc_class_relative;
7105 case R_PPC_REL24:
7106 case R_PPC_ADDR24:
7107 case R_PPC_JMP_SLOT:
7108 return reloc_class_plt;
7109 case R_PPC_COPY:
7110 return reloc_class_copy;
7111 default:
7112 return reloc_class_normal;
7113 }
7114 }
7115 \f
7116 /* Finish up the dynamic sections. */
7117
7118 static bfd_boolean
7119 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7120 struct bfd_link_info *info)
7121 {
7122 asection *sdyn;
7123 asection *splt;
7124 struct ppc_elf_link_hash_table *htab;
7125 bfd_vma got;
7126 bfd * dynobj;
7127
7128 #ifdef DEBUG
7129 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7130 #endif
7131
7132 htab = ppc_elf_hash_table (info);
7133 dynobj = elf_hash_table (info)->dynobj;
7134 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7135 if (htab->is_vxworks)
7136 splt = bfd_get_section_by_name (dynobj, ".plt");
7137 else
7138 splt = NULL;
7139
7140 got = 0;
7141 if (htab->elf.hgot != NULL)
7142 got = (htab->elf.hgot->root.u.def.value
7143 + htab->elf.hgot->root.u.def.section->output_section->vma
7144 + htab->elf.hgot->root.u.def.section->output_offset);
7145
7146 if (htab->elf.dynamic_sections_created)
7147 {
7148 Elf32_External_Dyn *dyncon, *dynconend;
7149
7150 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7151
7152 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7153 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7154 for (; dyncon < dynconend; dyncon++)
7155 {
7156 Elf_Internal_Dyn dyn;
7157 asection *s;
7158
7159 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7160
7161 switch (dyn.d_tag)
7162 {
7163 case DT_PLTGOT:
7164 if (htab->is_vxworks)
7165 s = htab->sgotplt;
7166 else
7167 s = htab->plt;
7168 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7169 break;
7170
7171 case DT_PLTRELSZ:
7172 dyn.d_un.d_val = htab->relplt->size;
7173 break;
7174
7175 case DT_JMPREL:
7176 s = htab->relplt;
7177 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7178 break;
7179
7180 case DT_PPC_GOT:
7181 dyn.d_un.d_ptr = got;
7182 break;
7183
7184 case DT_RELASZ:
7185 if (htab->is_vxworks)
7186 {
7187 if (htab->relplt)
7188 dyn.d_un.d_ptr -= htab->relplt->size;
7189 break;
7190 }
7191 continue;
7192
7193 default:
7194 continue;
7195 }
7196
7197 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7198 }
7199 }
7200
7201 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7202 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7203 if (htab->got != NULL)
7204 {
7205 unsigned char *p = htab->got->contents;
7206 bfd_vma val;
7207
7208 p += htab->elf.hgot->root.u.def.value;
7209 if (htab->plt_type == PLT_OLD)
7210 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7211
7212 val = 0;
7213 if (sdyn != NULL)
7214 val = sdyn->output_section->vma + sdyn->output_offset;
7215 bfd_put_32 (output_bfd, val, p);
7216
7217 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7218 }
7219
7220 /* Fill in the first entry in the VxWorks procedure linkage table. */
7221 if (splt && splt->size > 0)
7222 {
7223 /* Use the right PLT. */
7224 static const bfd_vma *plt_entry = NULL;
7225 plt_entry = info->shared ?
7226 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7227
7228 if (!info->shared)
7229 {
7230 bfd_vma got_value =
7231 (htab->elf.hgot->root.u.def.section->output_section->vma
7232 + htab->elf.hgot->root.u.def.section->output_offset
7233 + htab->elf.hgot->root.u.def.value);
7234 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7235
7236 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7237 splt->contents + 0);
7238 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7239 splt->contents + 4);
7240 }
7241 else
7242 {
7243 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7244 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7245 }
7246 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7247 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7248 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7249 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7250 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7251 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7252
7253 if (! info->shared)
7254 {
7255 Elf_Internal_Rela rela;
7256 bfd_byte *loc;
7257
7258 loc = htab->srelplt2->contents;
7259
7260 /* Output the @ha relocation for the first instruction. */
7261 rela.r_offset = (htab->plt->output_section->vma
7262 + htab->plt->output_offset
7263 + 2);
7264 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7265 rela.r_addend = 0;
7266 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7267 loc += sizeof (Elf32_External_Rela);
7268
7269 /* Output the @l relocation for the second instruction. */
7270 rela.r_offset = (htab->plt->output_section->vma
7271 + htab->plt->output_offset
7272 + 6);
7273 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7274 rela.r_addend = 0;
7275 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7276 loc += sizeof (Elf32_External_Rela);
7277
7278 /* Fix up the remaining relocations. They may have the wrong
7279 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7280 in which symbols were output. */
7281 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7282 {
7283 Elf_Internal_Rela rel;
7284
7285 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7286 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7287 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7288 loc += sizeof (Elf32_External_Rela);
7289
7290 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7291 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7292 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7293 loc += sizeof (Elf32_External_Rela);
7294
7295 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7296 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7297 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7298 loc += sizeof (Elf32_External_Rela);
7299 }
7300 }
7301 }
7302
7303 if (htab->glink != NULL && htab->glink->contents != NULL)
7304 {
7305 unsigned char *p;
7306 unsigned char *endp;
7307 bfd_vma res0;
7308 unsigned int i;
7309
7310 /*
7311 * PIC glink code is the following:
7312 *
7313 * # ith PLT code stub.
7314 * addis 11,30,(plt+(i-1)*4-got)@ha
7315 * lwz 11,(plt+(i-1)*4-got)@l(11)
7316 * mtctr 11
7317 * bctr
7318 *
7319 * # A table of branches, one for each plt entry.
7320 * # The idea is that the plt call stub loads ctr (and r11) with these
7321 * # addresses, so (r11 - res_0) gives the plt index * 4.
7322 * res_0: b PLTresolve
7323 * res_1: b PLTresolve
7324 * .
7325 * # Some number of entries towards the end can be nops
7326 * res_n_m3: nop
7327 * res_n_m2: nop
7328 * res_n_m1:
7329 *
7330 * PLTresolve:
7331 * addis 11,11,(1f-res_0)@ha
7332 * mflr 0
7333 * bcl 20,31,1f
7334 * 1: addi 11,11,(1b-res_0)@l
7335 * mflr 12
7336 * mtlr 0
7337 * sub 11,11,12 # r11 = index * 4
7338 * addis 12,12,(got+4-1b)@ha
7339 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7340 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7341 * mtctr 0
7342 * add 0,11,11
7343 * add 11,0,11 # r11 = index * 12 = reloc offset.
7344 * bctr
7345 */
7346 static const unsigned int pic_plt_resolve[] =
7347 {
7348 ADDIS_11_11,
7349 MFLR_0,
7350 BCL_20_31,
7351 ADDI_11_11,
7352 MFLR_12,
7353 MTLR_0,
7354 SUB_11_11_12,
7355 ADDIS_12_12,
7356 LWZ_0_12,
7357 LWZ_12_12,
7358 MTCTR_0,
7359 ADD_0_11_11,
7360 ADD_11_0_11,
7361 BCTR,
7362 NOP,
7363 NOP
7364 };
7365
7366 static const unsigned int plt_resolve[] =
7367 {
7368 LIS_12,
7369 ADDIS_11_11,
7370 LWZ_0_12,
7371 ADDI_11_11,
7372 MTCTR_0,
7373 ADD_0_11_11,
7374 LWZ_12_12,
7375 ADD_11_0_11,
7376 BCTR,
7377 NOP,
7378 NOP,
7379 NOP,
7380 NOP,
7381 NOP,
7382 NOP,
7383 NOP
7384 };
7385
7386 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7387 abort ();
7388 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7389 abort ();
7390
7391 /* Build the branch table, one for each plt entry (less one),
7392 and perhaps some padding. */
7393 p = htab->glink->contents;
7394 p += htab->glink_pltresolve;
7395 endp = htab->glink->contents;
7396 endp += htab->glink->size - GLINK_PLTRESOLVE;
7397 while (p < endp - 8 * 4)
7398 {
7399 bfd_put_32 (output_bfd, B + endp - p, p);
7400 p += 4;
7401 }
7402 while (p < endp)
7403 {
7404 bfd_put_32 (output_bfd, NOP, p);
7405 p += 4;
7406 }
7407
7408 res0 = (htab->glink_pltresolve
7409 + htab->glink->output_section->vma
7410 + htab->glink->output_offset);
7411
7412 /* Last comes the PLTresolve stub. */
7413 if (info->shared || info->pie)
7414 {
7415 bfd_vma bcl;
7416
7417 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7418 {
7419 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7420 p += 4;
7421 }
7422 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7423
7424 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7425 + htab->glink->output_section->vma
7426 + htab->glink->output_offset);
7427
7428 bfd_put_32 (output_bfd,
7429 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7430 bfd_put_32 (output_bfd,
7431 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7432 bfd_put_32 (output_bfd,
7433 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7434 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7435 {
7436 bfd_put_32 (output_bfd,
7437 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7438 bfd_put_32 (output_bfd,
7439 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7440 }
7441 else
7442 {
7443 bfd_put_32 (output_bfd,
7444 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7445 bfd_put_32 (output_bfd,
7446 LWZ_12_12 + 4, p + 9*4);
7447 }
7448 }
7449 else
7450 {
7451 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7452 {
7453 bfd_put_32 (output_bfd, plt_resolve[i], p);
7454 p += 4;
7455 }
7456 p -= 4 * ARRAY_SIZE (plt_resolve);
7457
7458 bfd_put_32 (output_bfd,
7459 LIS_12 + PPC_HA (got + 4), p + 0*4);
7460 bfd_put_32 (output_bfd,
7461 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7462 bfd_put_32 (output_bfd,
7463 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7464 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7465 {
7466 bfd_put_32 (output_bfd,
7467 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7468 bfd_put_32 (output_bfd,
7469 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7470 }
7471 else
7472 {
7473 bfd_put_32 (output_bfd,
7474 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7475 bfd_put_32 (output_bfd,
7476 LWZ_12_12 + 4, p + 6*4);
7477 }
7478 }
7479 }
7480
7481 return TRUE;
7482 }
7483 \f
7484 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7485 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7486 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7487 #define TARGET_BIG_NAME "elf32-powerpc"
7488 #define ELF_ARCH bfd_arch_powerpc
7489 #define ELF_MACHINE_CODE EM_PPC
7490 #ifdef __QNXTARGET__
7491 #define ELF_MAXPAGESIZE 0x1000
7492 #else
7493 #define ELF_MAXPAGESIZE 0x10000
7494 #endif
7495 #define ELF_MINPAGESIZE 0x1000
7496 #define ELF_COMMONPAGESIZE 0x1000
7497 #define elf_info_to_howto ppc_elf_info_to_howto
7498
7499 #ifdef EM_CYGNUS_POWERPC
7500 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7501 #endif
7502
7503 #ifdef EM_PPC_OLD
7504 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7505 #endif
7506
7507 #define elf_backend_plt_not_loaded 1
7508 #define elf_backend_can_gc_sections 1
7509 #define elf_backend_can_refcount 1
7510 #define elf_backend_rela_normal 1
7511
7512 #define bfd_elf32_mkobject ppc_elf_mkobject
7513 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7514 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7515 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7516 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7517 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7518 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7519
7520 #define elf_backend_object_p ppc_elf_object_p
7521 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7522 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7523 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7524 #define elf_backend_relocate_section ppc_elf_relocate_section
7525 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7526 #define elf_backend_check_relocs ppc_elf_check_relocs
7527 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7528 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7529 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7530 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7531 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7532 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7533 #define elf_backend_fake_sections ppc_elf_fake_sections
7534 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7535 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7536 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7537 #define elf_backend_write_core_note ppc_elf_write_core_note
7538 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7539 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7540 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7541 #define elf_backend_write_section ppc_elf_write_section
7542 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7543 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7544 #define elf_backend_action_discarded ppc_elf_action_discarded
7545 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7546
7547 #include "elf32-target.h"
7548
7549 /* VxWorks Target */
7550
7551 #undef TARGET_LITTLE_SYM
7552 #undef TARGET_LITTLE_NAME
7553
7554 #undef TARGET_BIG_SYM
7555 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7556 #undef TARGET_BIG_NAME
7557 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7558
7559 /* VxWorks uses the elf default section flags for .plt. */
7560 static const struct bfd_elf_special_section *
7561 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7562 {
7563 if (sec->name == NULL)
7564 return NULL;
7565
7566 if (strcmp (sec->name, ".plt") == 0)
7567 return _bfd_elf_get_sec_type_attr (abfd, sec);
7568
7569 return ppc_elf_get_sec_type_attr (abfd, sec);
7570 }
7571
7572 /* Like ppc_elf_link_hash_table_create, but overrides
7573 appropriately for VxWorks. */
7574 static struct bfd_link_hash_table *
7575 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7576 {
7577 struct bfd_link_hash_table *ret;
7578
7579 ret = ppc_elf_link_hash_table_create (abfd);
7580 if (ret)
7581 {
7582 struct ppc_elf_link_hash_table *htab
7583 = (struct ppc_elf_link_hash_table *)ret;
7584 htab->is_vxworks = 1;
7585 htab->plt_type = PLT_VXWORKS;
7586 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7587 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7588 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7589 }
7590 return ret;
7591 }
7592
7593 /* Tweak magic VxWorks symbols as they are loaded. */
7594 static bfd_boolean
7595 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7596 struct bfd_link_info *info,
7597 Elf_Internal_Sym *sym,
7598 const char **namep ATTRIBUTE_UNUSED,
7599 flagword *flagsp ATTRIBUTE_UNUSED,
7600 asection **secp,
7601 bfd_vma *valp)
7602 {
7603 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7604 valp))
7605 return FALSE;
7606
7607 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7608 }
7609
7610 static void
7611 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7612 {
7613 ppc_elf_final_write_processing(abfd, linker);
7614 elf_vxworks_final_write_processing(abfd, linker);
7615 }
7616
7617 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7618 define it. */
7619 #undef elf_backend_want_plt_sym
7620 #define elf_backend_want_plt_sym 1
7621 #undef elf_backend_want_got_plt
7622 #define elf_backend_want_got_plt 1
7623 #undef elf_backend_got_symbol_offset
7624 #define elf_backend_got_symbol_offset 0
7625 #undef elf_backend_plt_not_loaded
7626 #define elf_backend_plt_not_loaded 0
7627 #undef elf_backend_plt_readonly
7628 #define elf_backend_plt_readonly 1
7629 #undef elf_backend_got_header_size
7630 #define elf_backend_got_header_size 12
7631
7632 #undef bfd_elf32_bfd_link_hash_table_create
7633 #define bfd_elf32_bfd_link_hash_table_create \
7634 ppc_elf_vxworks_link_hash_table_create
7635 #undef elf_backend_add_symbol_hook
7636 #define elf_backend_add_symbol_hook \
7637 ppc_elf_vxworks_add_symbol_hook
7638 #undef elf_backend_link_output_symbol_hook
7639 #define elf_backend_link_output_symbol_hook \
7640 elf_vxworks_link_output_symbol_hook
7641 #undef elf_backend_final_write_processing
7642 #define elf_backend_final_write_processing \
7643 ppc_elf_vxworks_final_write_processing
7644 #undef elf_backend_get_sec_type_attr
7645 #define elf_backend_get_sec_type_attr \
7646 ppc_elf_vxworks_get_sec_type_attr
7647 #undef elf_backend_emit_relocs
7648 #define elf_backend_emit_relocs \
7649 elf_vxworks_emit_relocs
7650
7651 #undef elf32_bed
7652 #define elf32_bed ppc_elf_vxworks_bed
7653
7654 #include "elf32-target.h"
GDB Binutils - Deliverables
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