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* bfd-in2.h: Regenerate.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 if (abfd->tdata.any == NULL)
1712 {
1713 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1714 abfd->tdata.any = bfd_zalloc (abfd, amt);
1715 if (abfd->tdata.any == NULL)
1716 return FALSE;
1717 }
1718 return bfd_elf_mkobject (abfd);
1719 }
1720
1721 /* Fix bad default arch selected for a 32 bit input bfd when the
1722 default is 64 bit. */
1723
1724 static bfd_boolean
1725 ppc_elf_object_p (bfd *abfd)
1726 {
1727 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1728 {
1729 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1730
1731 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1732 {
1733 /* Relies on arch after 64 bit default being 32 bit default. */
1734 abfd->arch_info = abfd->arch_info->next;
1735 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1736 }
1737 }
1738 return TRUE;
1739 }
1740
1741 /* Function to set whether a module needs the -mrelocatable bit set. */
1742
1743 static bfd_boolean
1744 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1745 {
1746 BFD_ASSERT (!elf_flags_init (abfd)
1747 || elf_elfheader (abfd)->e_flags == flags);
1748
1749 elf_elfheader (abfd)->e_flags = flags;
1750 elf_flags_init (abfd) = TRUE;
1751 return TRUE;
1752 }
1753
1754 /* Support for core dump NOTE sections. */
1755
1756 static bfd_boolean
1757 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1758 {
1759 int offset;
1760 unsigned int size;
1761
1762 switch (note->descsz)
1763 {
1764 default:
1765 return FALSE;
1766
1767 case 268: /* Linux/PPC. */
1768 /* pr_cursig */
1769 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1770
1771 /* pr_pid */
1772 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1773
1774 /* pr_reg */
1775 offset = 72;
1776 size = 192;
1777
1778 break;
1779 }
1780
1781 /* Make a ".reg/999" section. */
1782 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1783 size, note->descpos + offset);
1784 }
1785
1786 static bfd_boolean
1787 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1788 {
1789 switch (note->descsz)
1790 {
1791 default:
1792 return FALSE;
1793
1794 case 128: /* Linux/PPC elf_prpsinfo. */
1795 elf_tdata (abfd)->core_program
1796 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1797 elf_tdata (abfd)->core_command
1798 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1799 }
1800
1801 /* Note that for some reason, a spurious space is tacked
1802 onto the end of the args in some (at least one anyway)
1803 implementations, so strip it off if it exists. */
1804
1805 {
1806 char *command = elf_tdata (abfd)->core_command;
1807 int n = strlen (command);
1808
1809 if (0 < n && command[n - 1] == ' ')
1810 command[n - 1] = '\0';
1811 }
1812
1813 return TRUE;
1814 }
1815
1816 /* Return address for Ith PLT stub in section PLT, for relocation REL
1817 or (bfd_vma) -1 if it should not be included. */
1818
1819 static bfd_vma
1820 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1821 const asection *plt ATTRIBUTE_UNUSED,
1822 const arelent *rel)
1823 {
1824 return rel->address;
1825 }
1826
1827 /* Handle a PowerPC specific section when reading an object file. This
1828 is called when bfd_section_from_shdr finds a section with an unknown
1829 type. */
1830
1831 static bfd_boolean
1832 ppc_elf_section_from_shdr (bfd *abfd,
1833 Elf_Internal_Shdr *hdr,
1834 const char *name,
1835 int shindex)
1836 {
1837 asection *newsect;
1838 flagword flags;
1839
1840 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1841 return FALSE;
1842
1843 newsect = hdr->bfd_section;
1844 flags = bfd_get_section_flags (abfd, newsect);
1845 if (hdr->sh_flags & SHF_EXCLUDE)
1846 flags |= SEC_EXCLUDE;
1847
1848 if (hdr->sh_type == SHT_ORDERED)
1849 flags |= SEC_SORT_ENTRIES;
1850
1851 bfd_set_section_flags (abfd, newsect, flags);
1852 return TRUE;
1853 }
1854
1855 /* Set up any other section flags and such that may be necessary. */
1856
1857 static bfd_boolean
1858 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1859 Elf_Internal_Shdr *shdr,
1860 asection *asect)
1861 {
1862 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1863 shdr->sh_flags |= SHF_EXCLUDE;
1864
1865 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1866 shdr->sh_type = SHT_ORDERED;
1867
1868 return TRUE;
1869 }
1870
1871 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1872 need to bump up the number of section headers. */
1873
1874 static int
1875 ppc_elf_additional_program_headers (bfd *abfd,
1876 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1877 {
1878 asection *s;
1879 int ret = 0;
1880
1881 s = bfd_get_section_by_name (abfd, ".sbss2");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1886 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1887 ++ret;
1888
1889 return ret;
1890 }
1891
1892 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1893 .PPC.EMB.sbss0 a normal section, and not a bss section so
1894 that the linker doesn't crater when trying to make more than
1895 2 sections. */
1896
1897 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1898 {
1899 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1900 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1901 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1902 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1903 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1904 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1905 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1906 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1907 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1908 { NULL, 0, 0, 0, 0 }
1909 };
1910
1911 /* This is what we want for new plt/got. */
1912 static struct bfd_elf_special_section ppc_alt_plt =
1913 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1914
1915 static const struct bfd_elf_special_section *
1916 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1917 {
1918 const struct bfd_elf_special_section *ssect;
1919
1920 /* See if this is one of the special sections. */
1921 if (sec->name == NULL)
1922 return NULL;
1923
1924 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1925 sec->use_rela_p);
1926 if (ssect != NULL)
1927 {
1928 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1929 ssect = &ppc_alt_plt;
1930 return ssect;
1931 }
1932
1933 return _bfd_elf_get_sec_type_attr (abfd, sec);
1934 }
1935 \f
1936 /* Very simple linked list structure for recording apuinfo values. */
1937 typedef struct apuinfo_list
1938 {
1939 struct apuinfo_list *next;
1940 unsigned long value;
1941 }
1942 apuinfo_list;
1943
1944 static apuinfo_list *head;
1945
1946
1947 static void
1948 apuinfo_list_init (void)
1949 {
1950 head = NULL;
1951 }
1952
1953 static void
1954 apuinfo_list_add (unsigned long value)
1955 {
1956 apuinfo_list *entry = head;
1957
1958 while (entry != NULL)
1959 {
1960 if (entry->value == value)
1961 return;
1962 entry = entry->next;
1963 }
1964
1965 entry = bfd_malloc (sizeof (* entry));
1966 if (entry == NULL)
1967 return;
1968
1969 entry->value = value;
1970 entry->next = head;
1971 head = entry;
1972 }
1973
1974 static unsigned
1975 apuinfo_list_length (void)
1976 {
1977 apuinfo_list *entry;
1978 unsigned long count;
1979
1980 for (entry = head, count = 0;
1981 entry;
1982 entry = entry->next)
1983 ++ count;
1984
1985 return count;
1986 }
1987
1988 static inline unsigned long
1989 apuinfo_list_element (unsigned long number)
1990 {
1991 apuinfo_list * entry;
1992
1993 for (entry = head;
1994 entry && number --;
1995 entry = entry->next)
1996 ;
1997
1998 return entry ? entry->value : 0;
1999 }
2000
2001 static void
2002 apuinfo_list_finish (void)
2003 {
2004 apuinfo_list *entry;
2005
2006 for (entry = head; entry;)
2007 {
2008 apuinfo_list *next = entry->next;
2009 free (entry);
2010 entry = next;
2011 }
2012
2013 head = NULL;
2014 }
2015
2016 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2017 #define APUINFO_LABEL "APUinfo"
2018
2019 /* Scan the input BFDs and create a linked list of
2020 the APUinfo values that will need to be emitted. */
2021
2022 static void
2023 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2024 {
2025 bfd *ibfd;
2026 asection *asec;
2027 char *buffer;
2028 unsigned num_input_sections;
2029 bfd_size_type output_section_size;
2030 unsigned i;
2031 unsigned num_entries;
2032 unsigned long offset;
2033 unsigned long length;
2034 const char *error_message = NULL;
2035
2036 if (link_info == NULL)
2037 return;
2038
2039 /* Scan the input bfds, looking for apuinfo sections. */
2040 num_input_sections = 0;
2041 output_section_size = 0;
2042
2043 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2044 {
2045 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2046 if (asec)
2047 {
2048 ++ num_input_sections;
2049 output_section_size += asec->size;
2050 }
2051 }
2052
2053 /* We need at least one input sections
2054 in order to make merging worthwhile. */
2055 if (num_input_sections < 1)
2056 return;
2057
2058 /* Just make sure that the output section exists as well. */
2059 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2060 if (asec == NULL)
2061 return;
2062
2063 /* Allocate a buffer for the contents of the input sections. */
2064 buffer = bfd_malloc (output_section_size);
2065 if (buffer == NULL)
2066 return;
2067
2068 offset = 0;
2069 apuinfo_list_init ();
2070
2071 /* Read in the input sections contents. */
2072 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2073 {
2074 unsigned long datum;
2075 char *ptr;
2076
2077 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2078 if (asec == NULL)
2079 continue;
2080
2081 length = asec->size;
2082 if (length < 24)
2083 {
2084 error_message = _("corrupt or empty %s section in %B");
2085 goto fail;
2086 }
2087
2088 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2089 || (bfd_bread (buffer + offset, length, ibfd) != length))
2090 {
2091 error_message = _("unable to read in %s section from %B");
2092 goto fail;
2093 }
2094
2095 /* Process the contents of the section. */
2096 ptr = buffer + offset;
2097 error_message = _("corrupt %s section in %B");
2098
2099 /* Verify the contents of the header. Note - we have to
2100 extract the values this way in order to allow for a
2101 host whose endian-ness is different from the target. */
2102 datum = bfd_get_32 (ibfd, ptr);
2103 if (datum != sizeof APUINFO_LABEL)
2104 goto fail;
2105
2106 datum = bfd_get_32 (ibfd, ptr + 8);
2107 if (datum != 0x2)
2108 goto fail;
2109
2110 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2111 goto fail;
2112
2113 /* Get the number of bytes used for apuinfo entries. */
2114 datum = bfd_get_32 (ibfd, ptr + 4);
2115 if (datum + 20 != length)
2116 goto fail;
2117
2118 /* Make sure that we do not run off the end of the section. */
2119 if (offset + length > output_section_size)
2120 goto fail;
2121
2122 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2123 for (i = 0; i < datum; i += 4)
2124 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2125
2126 /* Update the offset. */
2127 offset += length;
2128 }
2129
2130 error_message = NULL;
2131
2132 /* Compute the size of the output section. */
2133 num_entries = apuinfo_list_length ();
2134 output_section_size = 20 + num_entries * 4;
2135
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137
2138 if (! bfd_set_section_size (abfd, asec, output_section_size))
2139 ibfd = abfd,
2140 error_message = _("warning: unable to set size of %s section in %B");
2141
2142 fail:
2143 free (buffer);
2144
2145 if (error_message)
2146 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2147 }
2148
2149 /* Prevent the output section from accumulating the input sections'
2150 contents. We have already stored this in our linked list structure. */
2151
2152 static bfd_boolean
2153 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2154 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2155 asection *asec,
2156 bfd_byte *contents ATTRIBUTE_UNUSED)
2157 {
2158 return (apuinfo_list_length ()
2159 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2160 }
2161
2162 /* Finally we can generate the output section. */
2163
2164 static void
2165 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2166 {
2167 bfd_byte *buffer;
2168 asection *asec;
2169 unsigned i;
2170 unsigned num_entries;
2171 bfd_size_type length;
2172
2173 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2174 if (asec == NULL)
2175 return;
2176
2177 if (apuinfo_list_length () == 0)
2178 return;
2179
2180 length = asec->size;
2181 if (length < 20)
2182 return;
2183
2184 buffer = bfd_malloc (length);
2185 if (buffer == NULL)
2186 {
2187 (*_bfd_error_handler)
2188 (_("failed to allocate space for new APUinfo section."));
2189 return;
2190 }
2191
2192 /* Create the apuinfo header. */
2193 num_entries = apuinfo_list_length ();
2194 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2195 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2196 bfd_put_32 (abfd, 0x2, buffer + 8);
2197 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2198
2199 length = 20;
2200 for (i = 0; i < num_entries; i++)
2201 {
2202 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2203 length += 4;
2204 }
2205
2206 if (length != asec->size)
2207 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2208
2209 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2210 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2211
2212 free (buffer);
2213
2214 apuinfo_list_finish ();
2215 }
2216 \f
2217 /* The following functions are specific to the ELF linker, while
2218 functions above are used generally. They appear in this file more
2219 or less in the order in which they are called. eg.
2220 ppc_elf_check_relocs is called early in the link process,
2221 ppc_elf_finish_dynamic_sections is one of the last functions
2222 called. */
2223
2224 /* The PPC linker needs to keep track of the number of relocs that it
2225 decides to copy as dynamic relocs in check_relocs for each symbol.
2226 This is so that it can later discard them if they are found to be
2227 unnecessary. We store the information in a field extending the
2228 regular ELF linker hash table. */
2229
2230 struct ppc_elf_dyn_relocs
2231 {
2232 struct ppc_elf_dyn_relocs *next;
2233
2234 /* The input section of the reloc. */
2235 asection *sec;
2236
2237 /* Total number of relocs copied for the input section. */
2238 bfd_size_type count;
2239
2240 /* Number of pc-relative relocs copied for the input section. */
2241 bfd_size_type pc_count;
2242 };
2243
2244 /* Track PLT entries needed for a given symbol. We might need more
2245 than one glink entry per symbol. */
2246 struct plt_entry
2247 {
2248 struct plt_entry *next;
2249
2250 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2251 This field stores the offset into .got2 used to initialise the
2252 GOT pointer reg. It will always be at least 32768 (and for
2253 current gcc this is the only offset used). */
2254 bfd_vma addend;
2255
2256 /* The .got2 section. */
2257 asection *sec;
2258
2259 /* PLT refcount or offset. */
2260 union
2261 {
2262 bfd_signed_vma refcount;
2263 bfd_vma offset;
2264 } plt;
2265
2266 /* .glink stub offset. */
2267 bfd_vma glink_offset;
2268 };
2269
2270 /* Of those relocs that might be copied as dynamic relocs, this macro
2271 selects those that must be copied when linking a shared library,
2272 even when the symbol is local. */
2273
2274 #define MUST_BE_DYN_RELOC(RTYPE) \
2275 ((RTYPE) != R_PPC_REL24 \
2276 && (RTYPE) != R_PPC_REL14 \
2277 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2278 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2279 && (RTYPE) != R_PPC_REL32)
2280
2281 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2282 copying dynamic variables from a shared lib into an app's dynbss
2283 section, and instead use a dynamic relocation to point into the
2284 shared lib. */
2285 #define ELIMINATE_COPY_RELOCS 1
2286
2287 /* PPC ELF linker hash entry. */
2288
2289 struct ppc_elf_link_hash_entry
2290 {
2291 struct elf_link_hash_entry elf;
2292
2293 /* If this symbol is used in the linker created sections, the processor
2294 specific backend uses this field to map the field into the offset
2295 from the beginning of the section. */
2296 elf_linker_section_pointers_t *linker_section_pointer;
2297
2298 /* Track dynamic relocs copied for this symbol. */
2299 struct ppc_elf_dyn_relocs *dyn_relocs;
2300
2301 /* Contexts in which symbol is used in the GOT (or TOC).
2302 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2303 corresponding relocs are encountered during check_relocs.
2304 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2305 indicate the corresponding GOT entry type is not needed. */
2306 #define TLS_GD 1 /* GD reloc. */
2307 #define TLS_LD 2 /* LD reloc. */
2308 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2309 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2310 #define TLS_TLS 16 /* Any TLS reloc. */
2311 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2312 char tls_mask;
2313
2314 /* Nonzero if we have seen a small data relocation referring to this
2315 symbol. */
2316 unsigned char has_sda_refs;
2317 };
2318
2319 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2320
2321 enum ppc_elf_plt_type {
2322 PLT_UNSET,
2323 PLT_OLD,
2324 PLT_NEW,
2325 PLT_VXWORKS
2326 };
2327
2328 /* PPC ELF linker hash table. */
2329
2330 struct ppc_elf_link_hash_table
2331 {
2332 struct elf_link_hash_table elf;
2333
2334 /* Short-cuts to get to dynamic linker sections. */
2335 asection *got;
2336 asection *relgot;
2337 asection *glink;
2338 asection *plt;
2339 asection *relplt;
2340 asection *dynbss;
2341 asection *relbss;
2342 asection *dynsbss;
2343 asection *relsbss;
2344 elf_linker_section_t sdata[2];
2345 asection *sbss;
2346
2347 /* Shortcut to .__tls_get_addr. */
2348 struct elf_link_hash_entry *tls_get_addr;
2349
2350 /* TLS local dynamic got entry handling. */
2351 union {
2352 bfd_signed_vma refcount;
2353 bfd_vma offset;
2354 } tlsld_got;
2355
2356 /* Offset of PltResolve function in glink. */
2357 bfd_vma glink_pltresolve;
2358
2359 /* Size of reserved GOT entries. */
2360 unsigned int got_header_size;
2361 /* Non-zero if allocating the header left a gap. */
2362 unsigned int got_gap;
2363
2364 /* The type of PLT we have chosen to use. */
2365 enum ppc_elf_plt_type plt_type;
2366
2367 /* Whether we can use the new PLT layout. */
2368 unsigned int can_use_new_plt:1;
2369
2370 /* Set if we should emit symbols for stubs. */
2371 unsigned int emit_stub_syms:1;
2372
2373 /* Small local sym to section mapping cache. */
2374 struct sym_sec_cache sym_sec;
2375
2376 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2377 asection *srelplt2;
2378
2379 /* The .got.plt section (VxWorks only)*/
2380 asection *sgotplt;
2381
2382 /* True if the target system is VxWorks. */
2383 int is_vxworks;
2384
2385 /* The size of PLT entries. */
2386 int plt_entry_size;
2387 /* The distance between adjacent PLT slots. */
2388 int plt_slot_size;
2389 /* The size of the first PLT entry. */
2390 int plt_initial_entry_size;
2391 };
2392
2393 /* Get the PPC ELF linker hash table from a link_info structure. */
2394
2395 #define ppc_elf_hash_table(p) \
2396 ((struct ppc_elf_link_hash_table *) (p)->hash)
2397
2398 /* Create an entry in a PPC ELF linker hash table. */
2399
2400 static struct bfd_hash_entry *
2401 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2402 struct bfd_hash_table *table,
2403 const char *string)
2404 {
2405 /* Allocate the structure if it has not already been allocated by a
2406 subclass. */
2407 if (entry == NULL)
2408 {
2409 entry = bfd_hash_allocate (table,
2410 sizeof (struct ppc_elf_link_hash_entry));
2411 if (entry == NULL)
2412 return entry;
2413 }
2414
2415 /* Call the allocation method of the superclass. */
2416 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2417 if (entry != NULL)
2418 {
2419 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2420 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2421 ppc_elf_hash_entry (entry)->tls_mask = 0;
2422 }
2423
2424 return entry;
2425 }
2426
2427 /* Create a PPC ELF linker hash table. */
2428
2429 static struct bfd_link_hash_table *
2430 ppc_elf_link_hash_table_create (bfd *abfd)
2431 {
2432 struct ppc_elf_link_hash_table *ret;
2433
2434 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2435 if (ret == NULL)
2436 return NULL;
2437
2438 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2439 ppc_elf_link_hash_newfunc,
2440 sizeof (struct ppc_elf_link_hash_entry)))
2441 {
2442 free (ret);
2443 return NULL;
2444 }
2445
2446 ret->elf.init_plt_refcount.refcount = 0;
2447 ret->elf.init_plt_refcount.glist = NULL;
2448 ret->elf.init_plt_offset.offset = 0;
2449 ret->elf.init_plt_offset.glist = NULL;
2450
2451 ret->sdata[0].name = ".sdata";
2452 ret->sdata[0].sym_name = "_SDA_BASE_";
2453 ret->sdata[0].bss_name = ".sbss";
2454
2455 ret->sdata[1].name = ".sdata2";
2456 ret->sdata[1].sym_name = "_SDA2_BASE_";
2457 ret->sdata[1].bss_name = ".sbss2";
2458
2459 ret->plt_entry_size = 12;
2460 ret->plt_slot_size = 8;
2461 ret->plt_initial_entry_size = 72;
2462
2463 ret->is_vxworks = 0;
2464
2465 return &ret->elf.root;
2466 }
2467
2468 /* Create .got and the related sections. */
2469
2470 static bfd_boolean
2471 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2472 {
2473 struct ppc_elf_link_hash_table *htab;
2474 asection *s;
2475 flagword flags;
2476
2477 if (!_bfd_elf_create_got_section (abfd, info))
2478 return FALSE;
2479
2480 htab = ppc_elf_hash_table (info);
2481 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2482 if (s == NULL)
2483 abort ();
2484
2485 if (htab->is_vxworks)
2486 {
2487 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2488 if (!htab->sgotplt)
2489 abort ();
2490 }
2491 else
2492 {
2493 /* The powerpc .got has a blrl instruction in it. Mark it
2494 executable. */
2495 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2497 if (!bfd_set_section_flags (abfd, s, flags))
2498 return FALSE;
2499 }
2500
2501 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2502 | SEC_LINKER_CREATED | SEC_READONLY);
2503 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2504 if (!htab->relgot
2505 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2506 return FALSE;
2507
2508 return TRUE;
2509 }
2510
2511 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2512 to output sections (just like _bfd_elf_create_dynamic_sections has
2513 to create .dynbss and .rela.bss). */
2514
2515 static bfd_boolean
2516 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2517 {
2518 struct ppc_elf_link_hash_table *htab;
2519 asection *s;
2520 flagword flags;
2521
2522 htab = ppc_elf_hash_table (info);
2523
2524 if (htab->got == NULL
2525 && !ppc_elf_create_got (abfd, info))
2526 return FALSE;
2527
2528 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2529 return FALSE;
2530
2531 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2532 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2533
2534 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2535 htab->glink = s;
2536 if (s == NULL
2537 || !bfd_set_section_alignment (abfd, s, 4))
2538 return FALSE;
2539
2540 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2541 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2542 SEC_ALLOC | SEC_LINKER_CREATED);
2543 htab->dynsbss = s;
2544 if (s == NULL)
2545 return FALSE;
2546
2547 if (! info->shared)
2548 {
2549 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2550 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2551 htab->relsbss = s;
2552 if (s == NULL
2553 || ! bfd_set_section_alignment (abfd, s, 2))
2554 return FALSE;
2555 }
2556
2557 if (htab->is_vxworks
2558 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2559 return FALSE;
2560
2561 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2562 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2563 if (s == NULL)
2564 abort ();
2565
2566 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2567 if (htab->plt_type == PLT_VXWORKS)
2568 /* The VxWorks PLT is a loaded section with contents. */
2569 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2570 return bfd_set_section_flags (abfd, s, flags);
2571 }
2572
2573 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2574
2575 static void
2576 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2577 struct elf_link_hash_entry *dir,
2578 struct elf_link_hash_entry *ind)
2579 {
2580 struct ppc_elf_link_hash_entry *edir, *eind;
2581
2582 edir = (struct ppc_elf_link_hash_entry *) dir;
2583 eind = (struct ppc_elf_link_hash_entry *) ind;
2584
2585 if (eind->dyn_relocs != NULL)
2586 {
2587 if (edir->dyn_relocs != NULL)
2588 {
2589 struct ppc_elf_dyn_relocs **pp;
2590 struct ppc_elf_dyn_relocs *p;
2591
2592 /* Add reloc counts against the indirect sym to the direct sym
2593 list. Merge any entries against the same section. */
2594 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2595 {
2596 struct ppc_elf_dyn_relocs *q;
2597
2598 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2599 if (q->sec == p->sec)
2600 {
2601 q->pc_count += p->pc_count;
2602 q->count += p->count;
2603 *pp = p->next;
2604 break;
2605 }
2606 if (q == NULL)
2607 pp = &p->next;
2608 }
2609 *pp = edir->dyn_relocs;
2610 }
2611
2612 edir->dyn_relocs = eind->dyn_relocs;
2613 eind->dyn_relocs = NULL;
2614 }
2615
2616 edir->tls_mask |= eind->tls_mask;
2617 edir->has_sda_refs |= eind->has_sda_refs;
2618
2619 /* If called to transfer flags for a weakdef during processing
2620 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2621 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2622 if (!(ELIMINATE_COPY_RELOCS
2623 && eind->elf.root.type != bfd_link_hash_indirect
2624 && edir->elf.dynamic_adjusted))
2625 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2626
2627 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2628 edir->elf.ref_regular |= eind->elf.ref_regular;
2629 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2630 edir->elf.needs_plt |= eind->elf.needs_plt;
2631
2632 /* If we were called to copy over info for a weak sym, that's all. */
2633 if (eind->elf.root.type != bfd_link_hash_indirect)
2634 return;
2635
2636 /* Copy over the GOT refcount entries that we may have already seen to
2637 the symbol which just became indirect. */
2638 edir->elf.got.refcount += eind->elf.got.refcount;
2639 eind->elf.got.refcount = 0;
2640
2641 /* And plt entries. */
2642 if (eind->elf.plt.plist != NULL)
2643 {
2644 if (edir->elf.plt.plist != NULL)
2645 {
2646 struct plt_entry **entp;
2647 struct plt_entry *ent;
2648
2649 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2650 {
2651 struct plt_entry *dent;
2652
2653 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2654 if (dent->sec == ent->sec && dent->addend == ent->addend)
2655 {
2656 dent->plt.refcount += ent->plt.refcount;
2657 *entp = ent->next;
2658 break;
2659 }
2660 if (dent == NULL)
2661 entp = &ent->next;
2662 }
2663 *entp = edir->elf.plt.plist;
2664 }
2665
2666 edir->elf.plt.plist = eind->elf.plt.plist;
2667 eind->elf.plt.plist = NULL;
2668 }
2669
2670 if (eind->elf.dynindx != -1)
2671 {
2672 if (edir->elf.dynindx != -1)
2673 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2674 edir->elf.dynstr_index);
2675 edir->elf.dynindx = eind->elf.dynindx;
2676 edir->elf.dynstr_index = eind->elf.dynstr_index;
2677 eind->elf.dynindx = -1;
2678 eind->elf.dynstr_index = 0;
2679 }
2680 }
2681
2682 /* Return 1 if target is one of ours. */
2683
2684 static bfd_boolean
2685 is_ppc_elf_target (const struct bfd_target *targ)
2686 {
2687 extern const bfd_target bfd_elf32_powerpc_vec;
2688 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2689 extern const bfd_target bfd_elf32_powerpcle_vec;
2690
2691 return (targ == &bfd_elf32_powerpc_vec
2692 || targ == &bfd_elf32_powerpc_vxworks_vec
2693 || targ == &bfd_elf32_powerpcle_vec);
2694 }
2695
2696 /* Hook called by the linker routine which adds symbols from an object
2697 file. We use it to put .comm items in .sbss, and not .bss. */
2698
2699 static bfd_boolean
2700 ppc_elf_add_symbol_hook (bfd *abfd,
2701 struct bfd_link_info *info,
2702 Elf_Internal_Sym *sym,
2703 const char **namep ATTRIBUTE_UNUSED,
2704 flagword *flagsp ATTRIBUTE_UNUSED,
2705 asection **secp,
2706 bfd_vma *valp)
2707 {
2708 if (sym->st_shndx == SHN_COMMON
2709 && !info->relocatable
2710 && sym->st_size <= elf_gp_size (abfd)
2711 && is_ppc_elf_target (info->hash->creator))
2712 {
2713 /* Common symbols less than or equal to -G nn bytes are automatically
2714 put into .sbss. */
2715 struct ppc_elf_link_hash_table *htab;
2716
2717 htab = ppc_elf_hash_table (info);
2718 if (htab->sbss == NULL)
2719 {
2720 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2721
2722 if (!htab->elf.dynobj)
2723 htab->elf.dynobj = abfd;
2724
2725 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2726 ".sbss",
2727 flags);
2728 if (htab->sbss == NULL)
2729 return FALSE;
2730 }
2731
2732 *secp = htab->sbss;
2733 *valp = sym->st_size;
2734 }
2735
2736 return TRUE;
2737 }
2738 \f
2739 static bfd_boolean
2740 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2741 elf_linker_section_t *lsect)
2742 {
2743 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2744 TRUE, FALSE, TRUE);
2745 if (lsect->sym == NULL)
2746 return FALSE;
2747 if (lsect->sym->root.type == bfd_link_hash_new)
2748 lsect->sym->non_elf = 0;
2749 lsect->sym->ref_regular = 1;
2750 return TRUE;
2751 }
2752
2753 /* Create a special linker section. */
2754
2755 static bfd_boolean
2756 ppc_elf_create_linker_section (bfd *abfd,
2757 struct bfd_link_info *info,
2758 flagword flags,
2759 elf_linker_section_t *lsect)
2760 {
2761 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2762 asection *s;
2763
2764 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2765 | SEC_LINKER_CREATED);
2766
2767 /* Record the first bfd that needs the special sections. */
2768 if (!htab->elf.dynobj)
2769 htab->elf.dynobj = abfd;
2770
2771 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2772 lsect->name,
2773 flags);
2774 if (s == NULL
2775 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2776 return FALSE;
2777 lsect->section = s;
2778
2779 return create_sdata_sym (htab, lsect);
2780 }
2781
2782 /* Find a linker generated pointer with a given addend and type. */
2783
2784 static elf_linker_section_pointers_t *
2785 elf_find_pointer_linker_section
2786 (elf_linker_section_pointers_t *linker_pointers,
2787 bfd_vma addend,
2788 elf_linker_section_t *lsect)
2789 {
2790 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2791 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2792 return linker_pointers;
2793
2794 return NULL;
2795 }
2796
2797 /* Allocate a pointer to live in a linker created section. */
2798
2799 static bfd_boolean
2800 elf_create_pointer_linker_section (bfd *abfd,
2801 elf_linker_section_t *lsect,
2802 struct elf_link_hash_entry *h,
2803 const Elf_Internal_Rela *rel)
2804 {
2805 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2806 elf_linker_section_pointers_t *linker_section_ptr;
2807 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2808 bfd_size_type amt;
2809
2810 BFD_ASSERT (lsect != NULL);
2811
2812 /* Is this a global symbol? */
2813 if (h != NULL)
2814 {
2815 struct ppc_elf_link_hash_entry *eh;
2816
2817 /* Has this symbol already been allocated? If so, our work is done. */
2818 eh = (struct ppc_elf_link_hash_entry *) h;
2819 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2820 rel->r_addend,
2821 lsect))
2822 return TRUE;
2823
2824 ptr_linker_section_ptr = &eh->linker_section_pointer;
2825 }
2826 else
2827 {
2828 /* Allocation of a pointer to a local symbol. */
2829 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2830
2831 /* Allocate a table to hold the local symbols if first time. */
2832 if (!ptr)
2833 {
2834 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2835
2836 amt = num_symbols;
2837 amt *= sizeof (elf_linker_section_pointers_t *);
2838 ptr = bfd_zalloc (abfd, amt);
2839
2840 if (!ptr)
2841 return FALSE;
2842
2843 elf_local_ptr_offsets (abfd) = ptr;
2844 }
2845
2846 /* Has this symbol already been allocated? If so, our work is done. */
2847 if (elf_find_pointer_linker_section (ptr[r_symndx],
2848 rel->r_addend,
2849 lsect))
2850 return TRUE;
2851
2852 ptr_linker_section_ptr = &ptr[r_symndx];
2853 }
2854
2855 /* Allocate space for a pointer in the linker section, and allocate
2856 a new pointer record from internal memory. */
2857 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2858 amt = sizeof (elf_linker_section_pointers_t);
2859 linker_section_ptr = bfd_alloc (abfd, amt);
2860
2861 if (!linker_section_ptr)
2862 return FALSE;
2863
2864 linker_section_ptr->next = *ptr_linker_section_ptr;
2865 linker_section_ptr->addend = rel->r_addend;
2866 linker_section_ptr->lsect = lsect;
2867 *ptr_linker_section_ptr = linker_section_ptr;
2868
2869 linker_section_ptr->offset = lsect->section->size;
2870 lsect->section->size += 4;
2871
2872 #ifdef DEBUG
2873 fprintf (stderr,
2874 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2875 lsect->name, (long) linker_section_ptr->offset,
2876 (long) lsect->section->size);
2877 #endif
2878
2879 return TRUE;
2880 }
2881
2882 static bfd_boolean
2883 update_local_sym_info (bfd *abfd,
2884 Elf_Internal_Shdr *symtab_hdr,
2885 unsigned long r_symndx,
2886 int tls_type)
2887 {
2888 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2889 char *local_got_tls_masks;
2890
2891 if (local_got_refcounts == NULL)
2892 {
2893 bfd_size_type size = symtab_hdr->sh_info;
2894
2895 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2896 local_got_refcounts = bfd_zalloc (abfd, size);
2897 if (local_got_refcounts == NULL)
2898 return FALSE;
2899 elf_local_got_refcounts (abfd) = local_got_refcounts;
2900 }
2901
2902 local_got_refcounts[r_symndx] += 1;
2903 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2904 local_got_tls_masks[r_symndx] |= tls_type;
2905 return TRUE;
2906 }
2907
2908 static bfd_boolean
2909 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2910 asection *sec, bfd_vma addend)
2911 {
2912 struct plt_entry *ent;
2913
2914 if (addend < 32768)
2915 sec = NULL;
2916 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2917 if (ent->sec == sec && ent->addend == addend)
2918 break;
2919 if (ent == NULL)
2920 {
2921 bfd_size_type amt = sizeof (*ent);
2922 ent = bfd_alloc (abfd, amt);
2923 if (ent == NULL)
2924 return FALSE;
2925 ent->next = h->plt.plist;
2926 ent->sec = sec;
2927 ent->addend = addend;
2928 ent->plt.refcount = 0;
2929 h->plt.plist = ent;
2930 }
2931 ent->plt.refcount += 1;
2932 return TRUE;
2933 }
2934
2935 static struct plt_entry *
2936 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2937 {
2938 struct plt_entry *ent;
2939
2940 if (addend < 32768)
2941 sec = NULL;
2942 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2943 if (ent->sec == sec && ent->addend == addend)
2944 break;
2945 return ent;
2946 }
2947
2948 static void
2949 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2950 {
2951 (*_bfd_error_handler)
2952 (_("%B: relocation %s cannot be used when making a shared object"),
2953 abfd,
2954 ppc_elf_howto_table[r_type]->name);
2955 bfd_set_error (bfd_error_bad_value);
2956 }
2957
2958 /* Look through the relocs for a section during the first phase, and
2959 allocate space in the global offset table or procedure linkage
2960 table. */
2961
2962 static bfd_boolean
2963 ppc_elf_check_relocs (bfd *abfd,
2964 struct bfd_link_info *info,
2965 asection *sec,
2966 const Elf_Internal_Rela *relocs)
2967 {
2968 struct ppc_elf_link_hash_table *htab;
2969 Elf_Internal_Shdr *symtab_hdr;
2970 struct elf_link_hash_entry **sym_hashes;
2971 const Elf_Internal_Rela *rel;
2972 const Elf_Internal_Rela *rel_end;
2973 asection *got2, *sreloc;
2974
2975 if (info->relocatable)
2976 return TRUE;
2977
2978 /* Don't do anything special with non-loaded, non-alloced sections.
2979 In particular, any relocs in such sections should not affect GOT
2980 and PLT reference counting (ie. we don't allow them to create GOT
2981 or PLT entries), there's no possibility or desire to optimize TLS
2982 relocs, and there's not much point in propagating relocs to shared
2983 libs that the dynamic linker won't relocate. */
2984 if ((sec->flags & SEC_ALLOC) == 0)
2985 return TRUE;
2986
2987 #ifdef DEBUG
2988 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2989 sec, abfd);
2990 #endif
2991
2992 /* Initialize howto table if not already done. */
2993 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2994 ppc_elf_howto_init ();
2995
2996 htab = ppc_elf_hash_table (info);
2997 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2998 sym_hashes = elf_sym_hashes (abfd);
2999 got2 = bfd_get_section_by_name (abfd, ".got2");
3000 sreloc = NULL;
3001
3002 rel_end = relocs + sec->reloc_count;
3003 for (rel = relocs; rel < rel_end; rel++)
3004 {
3005 unsigned long r_symndx;
3006 enum elf_ppc_reloc_type r_type;
3007 struct elf_link_hash_entry *h;
3008 int tls_type = 0;
3009
3010 r_symndx = ELF32_R_SYM (rel->r_info);
3011 if (r_symndx < symtab_hdr->sh_info)
3012 h = NULL;
3013 else
3014 {
3015 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3016 while (h->root.type == bfd_link_hash_indirect
3017 || h->root.type == bfd_link_hash_warning)
3018 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3019 }
3020
3021 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3022 This shows up in particular in an R_PPC_ADDR32 in the eabi
3023 startup code. */
3024 if (h != NULL
3025 && htab->got == NULL
3026 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3027 {
3028 if (htab->elf.dynobj == NULL)
3029 htab->elf.dynobj = abfd;
3030 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3031 return FALSE;
3032 BFD_ASSERT (h == htab->elf.hgot);
3033 }
3034
3035 r_type = ELF32_R_TYPE (rel->r_info);
3036 switch (r_type)
3037 {
3038 case R_PPC_GOT_TLSLD16:
3039 case R_PPC_GOT_TLSLD16_LO:
3040 case R_PPC_GOT_TLSLD16_HI:
3041 case R_PPC_GOT_TLSLD16_HA:
3042 htab->tlsld_got.refcount += 1;
3043 tls_type = TLS_TLS | TLS_LD;
3044 goto dogottls;
3045
3046 case R_PPC_GOT_TLSGD16:
3047 case R_PPC_GOT_TLSGD16_LO:
3048 case R_PPC_GOT_TLSGD16_HI:
3049 case R_PPC_GOT_TLSGD16_HA:
3050 tls_type = TLS_TLS | TLS_GD;
3051 goto dogottls;
3052
3053 case R_PPC_GOT_TPREL16:
3054 case R_PPC_GOT_TPREL16_LO:
3055 case R_PPC_GOT_TPREL16_HI:
3056 case R_PPC_GOT_TPREL16_HA:
3057 if (info->shared)
3058 info->flags |= DF_STATIC_TLS;
3059 tls_type = TLS_TLS | TLS_TPREL;
3060 goto dogottls;
3061
3062 case R_PPC_GOT_DTPREL16:
3063 case R_PPC_GOT_DTPREL16_LO:
3064 case R_PPC_GOT_DTPREL16_HI:
3065 case R_PPC_GOT_DTPREL16_HA:
3066 tls_type = TLS_TLS | TLS_DTPREL;
3067 dogottls:
3068 sec->has_tls_reloc = 1;
3069 /* Fall thru */
3070
3071 /* GOT16 relocations */
3072 case R_PPC_GOT16:
3073 case R_PPC_GOT16_LO:
3074 case R_PPC_GOT16_HI:
3075 case R_PPC_GOT16_HA:
3076 /* This symbol requires a global offset table entry. */
3077 if (htab->got == NULL)
3078 {
3079 if (htab->elf.dynobj == NULL)
3080 htab->elf.dynobj = abfd;
3081 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3082 return FALSE;
3083 }
3084 if (h != NULL)
3085 {
3086 h->got.refcount += 1;
3087 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3088 }
3089 else
3090 /* This is a global offset table entry for a local symbol. */
3091 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3092 return FALSE;
3093 break;
3094
3095 /* Indirect .sdata relocation. */
3096 case R_PPC_EMB_SDAI16:
3097 if (info->shared)
3098 {
3099 bad_shared_reloc (abfd, r_type);
3100 return FALSE;
3101 }
3102 if (htab->sdata[0].section == NULL
3103 && !ppc_elf_create_linker_section (abfd, info, 0,
3104 &htab->sdata[0]))
3105 return FALSE;
3106 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3107 h, rel))
3108 return FALSE;
3109 if (h != NULL)
3110 {
3111 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3112 h->non_got_ref = TRUE;
3113 }
3114 break;
3115
3116 /* Indirect .sdata2 relocation. */
3117 case R_PPC_EMB_SDA2I16:
3118 if (info->shared)
3119 {
3120 bad_shared_reloc (abfd, r_type);
3121 return FALSE;
3122 }
3123 if (htab->sdata[1].section == NULL
3124 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3125 &htab->sdata[1]))
3126 return FALSE;
3127 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3128 h, rel))
3129 return FALSE;
3130 if (h != NULL)
3131 {
3132 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3133 h->non_got_ref = TRUE;
3134 }
3135 break;
3136
3137 case R_PPC_SDAREL16:
3138 if (info->shared)
3139 {
3140 bad_shared_reloc (abfd, r_type);
3141 return FALSE;
3142 }
3143 if (htab->sdata[0].sym == NULL
3144 && !create_sdata_sym (htab, &htab->sdata[0]))
3145 return FALSE;
3146 if (h != NULL)
3147 {
3148 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3149 h->non_got_ref = TRUE;
3150 }
3151 break;
3152
3153 case R_PPC_EMB_SDA2REL:
3154 if (info->shared)
3155 {
3156 bad_shared_reloc (abfd, r_type);
3157 return FALSE;
3158 }
3159 if (htab->sdata[1].sym == NULL
3160 && !create_sdata_sym (htab, &htab->sdata[1]))
3161 return FALSE;
3162 if (h != NULL)
3163 {
3164 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3165 h->non_got_ref = TRUE;
3166 }
3167 break;
3168
3169 case R_PPC_EMB_SDA21:
3170 case R_PPC_EMB_RELSDA:
3171 if (info->shared)
3172 {
3173 bad_shared_reloc (abfd, r_type);
3174 return FALSE;
3175 }
3176 if (htab->sdata[0].sym == NULL
3177 && !create_sdata_sym (htab, &htab->sdata[0]))
3178 return FALSE;
3179 if (htab->sdata[1].sym == NULL
3180 && !create_sdata_sym (htab, &htab->sdata[1]))
3181 return FALSE;
3182 if (h != NULL)
3183 {
3184 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3185 h->non_got_ref = TRUE;
3186 }
3187 break;
3188
3189 case R_PPC_EMB_NADDR32:
3190 case R_PPC_EMB_NADDR16:
3191 case R_PPC_EMB_NADDR16_LO:
3192 case R_PPC_EMB_NADDR16_HI:
3193 case R_PPC_EMB_NADDR16_HA:
3194 if (info->shared)
3195 {
3196 bad_shared_reloc (abfd, r_type);
3197 return FALSE;
3198 }
3199 if (h != NULL)
3200 h->non_got_ref = TRUE;
3201 break;
3202
3203 case R_PPC_PLT32:
3204 case R_PPC_PLTREL24:
3205 case R_PPC_PLTREL32:
3206 case R_PPC_PLT16_LO:
3207 case R_PPC_PLT16_HI:
3208 case R_PPC_PLT16_HA:
3209 #ifdef DEBUG
3210 fprintf (stderr, "Reloc requires a PLT entry\n");
3211 #endif
3212 /* This symbol requires a procedure linkage table entry. We
3213 actually build the entry in finish_dynamic_symbol,
3214 because this might be a case of linking PIC code without
3215 linking in any dynamic objects, in which case we don't
3216 need to generate a procedure linkage table after all. */
3217
3218 if (h == NULL)
3219 {
3220 /* It does not make sense to have a procedure linkage
3221 table entry for a local symbol. */
3222 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3223 "local symbol"),
3224 abfd,
3225 sec,
3226 (long) rel->r_offset,
3227 ppc_elf_howto_table[r_type]->name);
3228 bfd_set_error (bfd_error_bad_value);
3229 return FALSE;
3230 }
3231 else
3232 {
3233 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3234
3235 h->needs_plt = 1;
3236 if (!update_plt_info (abfd, h, got2, addend))
3237 return FALSE;
3238 }
3239 break;
3240
3241 /* The following relocations don't need to propagate the
3242 relocation if linking a shared object since they are
3243 section relative. */
3244 case R_PPC_SECTOFF:
3245 case R_PPC_SECTOFF_LO:
3246 case R_PPC_SECTOFF_HI:
3247 case R_PPC_SECTOFF_HA:
3248 case R_PPC_DTPREL16:
3249 case R_PPC_DTPREL16_LO:
3250 case R_PPC_DTPREL16_HI:
3251 case R_PPC_DTPREL16_HA:
3252 case R_PPC_TOC16:
3253 break;
3254
3255 case R_PPC_REL16:
3256 case R_PPC_REL16_LO:
3257 case R_PPC_REL16_HI:
3258 case R_PPC_REL16_HA:
3259 htab->can_use_new_plt = 1;
3260 break;
3261
3262 /* These are just markers. */
3263 case R_PPC_TLS:
3264 case R_PPC_EMB_MRKREF:
3265 case R_PPC_NONE:
3266 case R_PPC_max:
3267 break;
3268
3269 /* These should only appear in dynamic objects. */
3270 case R_PPC_COPY:
3271 case R_PPC_GLOB_DAT:
3272 case R_PPC_JMP_SLOT:
3273 case R_PPC_RELATIVE:
3274 break;
3275
3276 /* These aren't handled yet. We'll report an error later. */
3277 case R_PPC_ADDR30:
3278 case R_PPC_EMB_RELSEC16:
3279 case R_PPC_EMB_RELST_LO:
3280 case R_PPC_EMB_RELST_HI:
3281 case R_PPC_EMB_RELST_HA:
3282 case R_PPC_EMB_BIT_FLD:
3283 break;
3284
3285 /* This refers only to functions defined in the shared library. */
3286 case R_PPC_LOCAL24PC:
3287 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3288 htab->plt_type = PLT_OLD;
3289 break;
3290
3291 /* This relocation describes the C++ object vtable hierarchy.
3292 Reconstruct it for later use during GC. */
3293 case R_PPC_GNU_VTINHERIT:
3294 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3295 return FALSE;
3296 break;
3297
3298 /* This relocation describes which C++ vtable entries are actually
3299 used. Record for later use during GC. */
3300 case R_PPC_GNU_VTENTRY:
3301 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3302 return FALSE;
3303 break;
3304
3305 /* We shouldn't really be seeing these. */
3306 case R_PPC_TPREL32:
3307 if (info->shared)
3308 info->flags |= DF_STATIC_TLS;
3309 goto dodyn;
3310
3311 /* Nor these. */
3312 case R_PPC_DTPMOD32:
3313 case R_PPC_DTPREL32:
3314 goto dodyn;
3315
3316 case R_PPC_TPREL16:
3317 case R_PPC_TPREL16_LO:
3318 case R_PPC_TPREL16_HI:
3319 case R_PPC_TPREL16_HA:
3320 if (info->shared)
3321 info->flags |= DF_STATIC_TLS;
3322 goto dodyn;
3323
3324 case R_PPC_REL32:
3325 if (h == NULL
3326 && got2 != NULL
3327 && (sec->flags & SEC_CODE) != 0
3328 && (info->shared || info->pie)
3329 && htab->plt_type == PLT_UNSET)
3330 {
3331 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3332 the start of a function, which assembles to a REL32
3333 reference to .got2. If we detect one of these, then
3334 force the old PLT layout because the linker cannot
3335 reliably deduce the GOT pointer value needed for
3336 PLT call stubs. */
3337 asection *s;
3338
3339 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3340 r_symndx);
3341 if (s == got2)
3342 htab->plt_type = PLT_OLD;
3343 }
3344 if (h == NULL || h == htab->elf.hgot)
3345 break;
3346 goto dodyn1;
3347
3348 case R_PPC_REL24:
3349 case R_PPC_REL14:
3350 case R_PPC_REL14_BRTAKEN:
3351 case R_PPC_REL14_BRNTAKEN:
3352 if (h == NULL)
3353 break;
3354 if (h == htab->elf.hgot)
3355 {
3356 if (htab->plt_type == PLT_UNSET)
3357 htab->plt_type = PLT_OLD;
3358 break;
3359 }
3360 /* fall through */
3361
3362 case R_PPC_ADDR32:
3363 case R_PPC_ADDR24:
3364 case R_PPC_ADDR16:
3365 case R_PPC_ADDR16_LO:
3366 case R_PPC_ADDR16_HI:
3367 case R_PPC_ADDR16_HA:
3368 case R_PPC_ADDR14:
3369 case R_PPC_ADDR14_BRTAKEN:
3370 case R_PPC_ADDR14_BRNTAKEN:
3371 case R_PPC_UADDR32:
3372 case R_PPC_UADDR16:
3373 dodyn1:
3374 if (h != NULL && !info->shared)
3375 {
3376 /* We may need a plt entry if the symbol turns out to be
3377 a function defined in a dynamic object. */
3378 if (!update_plt_info (abfd, h, NULL, 0))
3379 return FALSE;
3380
3381 /* We may need a copy reloc too. */
3382 h->non_got_ref = 1;
3383 }
3384
3385 dodyn:
3386 /* If we are creating a shared library, and this is a reloc
3387 against a global symbol, or a non PC relative reloc
3388 against a local symbol, then we need to copy the reloc
3389 into the shared library. However, if we are linking with
3390 -Bsymbolic, we do not need to copy a reloc against a
3391 global symbol which is defined in an object we are
3392 including in the link (i.e., DEF_REGULAR is set). At
3393 this point we have not seen all the input files, so it is
3394 possible that DEF_REGULAR is not set now but will be set
3395 later (it is never cleared). In case of a weak definition,
3396 DEF_REGULAR may be cleared later by a strong definition in
3397 a shared library. We account for that possibility below by
3398 storing information in the dyn_relocs field of the hash
3399 table entry. A similar situation occurs when creating
3400 shared libraries and symbol visibility changes render the
3401 symbol local.
3402
3403 If on the other hand, we are creating an executable, we
3404 may need to keep relocations for symbols satisfied by a
3405 dynamic library if we manage to avoid copy relocs for the
3406 symbol. */
3407 if ((info->shared
3408 && (MUST_BE_DYN_RELOC (r_type)
3409 || (h != NULL
3410 && (! info->symbolic
3411 || h->root.type == bfd_link_hash_defweak
3412 || !h->def_regular))))
3413 || (ELIMINATE_COPY_RELOCS
3414 && !info->shared
3415 && h != NULL
3416 && (h->root.type == bfd_link_hash_defweak
3417 || !h->def_regular)))
3418 {
3419 struct ppc_elf_dyn_relocs *p;
3420 struct ppc_elf_dyn_relocs **head;
3421
3422 #ifdef DEBUG
3423 fprintf (stderr,
3424 "ppc_elf_check_relocs needs to "
3425 "create relocation for %s\n",
3426 (h && h->root.root.string
3427 ? h->root.root.string : "<unknown>"));
3428 #endif
3429 if (sreloc == NULL)
3430 {
3431 const char *name;
3432
3433 name = (bfd_elf_string_from_elf_section
3434 (abfd,
3435 elf_elfheader (abfd)->e_shstrndx,
3436 elf_section_data (sec)->rel_hdr.sh_name));
3437 if (name == NULL)
3438 return FALSE;
3439
3440 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3441 && strcmp (bfd_get_section_name (abfd, sec),
3442 name + 5) == 0);
3443
3444 if (htab->elf.dynobj == NULL)
3445 htab->elf.dynobj = abfd;
3446 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3447 if (sreloc == NULL)
3448 {
3449 flagword flags;
3450
3451 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3452 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3453 | SEC_ALLOC | SEC_LOAD);
3454 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3455 name,
3456 flags);
3457 if (sreloc == NULL
3458 || ! bfd_set_section_alignment (htab->elf.dynobj,
3459 sreloc, 2))
3460 return FALSE;
3461 }
3462 elf_section_data (sec)->sreloc = sreloc;
3463 }
3464
3465 /* If this is a global symbol, we count the number of
3466 relocations we need for this symbol. */
3467 if (h != NULL)
3468 {
3469 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3470 }
3471 else
3472 {
3473 /* Track dynamic relocs needed for local syms too.
3474 We really need local syms available to do this
3475 easily. Oh well. */
3476
3477 asection *s;
3478 void *vpp;
3479
3480 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3481 sec, r_symndx);
3482 if (s == NULL)
3483 return FALSE;
3484
3485 vpp = &elf_section_data (s)->local_dynrel;
3486 head = (struct ppc_elf_dyn_relocs **) vpp;
3487 }
3488
3489 p = *head;
3490 if (p == NULL || p->sec != sec)
3491 {
3492 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3493 if (p == NULL)
3494 return FALSE;
3495 p->next = *head;
3496 *head = p;
3497 p->sec = sec;
3498 p->count = 0;
3499 p->pc_count = 0;
3500 }
3501
3502 p->count += 1;
3503 if (!MUST_BE_DYN_RELOC (r_type))
3504 p->pc_count += 1;
3505 }
3506
3507 break;
3508 }
3509 }
3510
3511 return TRUE;
3512 }
3513 \f
3514 /* Merge backend specific data from an object file to the output
3515 object file when linking. */
3516
3517 static bfd_boolean
3518 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3519 {
3520 flagword old_flags;
3521 flagword new_flags;
3522 bfd_boolean error;
3523
3524 if (!is_ppc_elf_target (ibfd->xvec)
3525 || !is_ppc_elf_target (obfd->xvec))
3526 return TRUE;
3527
3528 /* Check if we have the same endianess. */
3529 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3530 return FALSE;
3531
3532 new_flags = elf_elfheader (ibfd)->e_flags;
3533 old_flags = elf_elfheader (obfd)->e_flags;
3534 if (!elf_flags_init (obfd))
3535 {
3536 /* First call, no flags set. */
3537 elf_flags_init (obfd) = TRUE;
3538 elf_elfheader (obfd)->e_flags = new_flags;
3539 }
3540
3541 /* Compatible flags are ok. */
3542 else if (new_flags == old_flags)
3543 ;
3544
3545 /* Incompatible flags. */
3546 else
3547 {
3548 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3549 to be linked with either. */
3550 error = FALSE;
3551 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3552 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3553 {
3554 error = TRUE;
3555 (*_bfd_error_handler)
3556 (_("%B: compiled with -mrelocatable and linked with "
3557 "modules compiled normally"), ibfd);
3558 }
3559 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3560 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3561 {
3562 error = TRUE;
3563 (*_bfd_error_handler)
3564 (_("%B: compiled normally and linked with "
3565 "modules compiled with -mrelocatable"), ibfd);
3566 }
3567
3568 /* The output is -mrelocatable-lib iff both the input files are. */
3569 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3570 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3571
3572 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3573 but each input file is either -mrelocatable or -mrelocatable-lib. */
3574 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3575 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3576 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3577 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3578
3579 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3580 any module uses it. */
3581 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3582
3583 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3584 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3585
3586 /* Warn about any other mismatches. */
3587 if (new_flags != old_flags)
3588 {
3589 error = TRUE;
3590 (*_bfd_error_handler)
3591 (_("%B: uses different e_flags (0x%lx) fields "
3592 "than previous modules (0x%lx)"),
3593 ibfd, (long) new_flags, (long) old_flags);
3594 }
3595
3596 if (error)
3597 {
3598 bfd_set_error (bfd_error_bad_value);
3599 return FALSE;
3600 }
3601 }
3602
3603 return TRUE;
3604 }
3605 \f
3606 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3607 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3608 int
3609 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3610 struct bfd_link_info *info,
3611 int force_old_plt,
3612 int emit_stub_syms)
3613 {
3614 struct ppc_elf_link_hash_table *htab;
3615 flagword flags;
3616
3617 htab = ppc_elf_hash_table (info);
3618
3619 if (htab->plt_type == PLT_UNSET)
3620 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3621 ? PLT_OLD : PLT_NEW);
3622
3623 htab->emit_stub_syms = emit_stub_syms;
3624
3625 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3626
3627 if (htab->plt_type == PLT_NEW)
3628 {
3629 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3630 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3631
3632 /* The new PLT is a loaded section. */
3633 if (htab->plt != NULL
3634 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3635 return -1;
3636
3637 /* The new GOT is not executable. */
3638 if (htab->got != NULL
3639 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3640 return -1;
3641 }
3642 else
3643 {
3644 /* Stop an unused .glink section from affecting .text alignment. */
3645 if (htab->glink != NULL
3646 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3647 return -1;
3648 }
3649 return htab->plt_type == PLT_NEW;
3650 }
3651 \f
3652 /* Return the section that should be marked against GC for a given
3653 relocation. */
3654
3655 static asection *
3656 ppc_elf_gc_mark_hook (asection *sec,
3657 struct bfd_link_info *info,
3658 Elf_Internal_Rela *rel,
3659 struct elf_link_hash_entry *h,
3660 Elf_Internal_Sym *sym)
3661 {
3662 if (h != NULL)
3663 switch (ELF32_R_TYPE (rel->r_info))
3664 {
3665 case R_PPC_GNU_VTINHERIT:
3666 case R_PPC_GNU_VTENTRY:
3667 return NULL;
3668 }
3669
3670 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3671 }
3672
3673 /* Update the got, plt and dynamic reloc reference counts for the
3674 section being removed. */
3675
3676 static bfd_boolean
3677 ppc_elf_gc_sweep_hook (bfd *abfd,
3678 struct bfd_link_info *info,
3679 asection *sec,
3680 const Elf_Internal_Rela *relocs)
3681 {
3682 struct ppc_elf_link_hash_table *htab;
3683 Elf_Internal_Shdr *symtab_hdr;
3684 struct elf_link_hash_entry **sym_hashes;
3685 bfd_signed_vma *local_got_refcounts;
3686 const Elf_Internal_Rela *rel, *relend;
3687 asection *got2;
3688
3689 if ((sec->flags & SEC_ALLOC) == 0)
3690 return TRUE;
3691
3692 elf_section_data (sec)->local_dynrel = NULL;
3693
3694 htab = ppc_elf_hash_table (info);
3695 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3696 sym_hashes = elf_sym_hashes (abfd);
3697 local_got_refcounts = elf_local_got_refcounts (abfd);
3698 got2 = bfd_get_section_by_name (abfd, ".got2");
3699
3700 relend = relocs + sec->reloc_count;
3701 for (rel = relocs; rel < relend; rel++)
3702 {
3703 unsigned long r_symndx;
3704 enum elf_ppc_reloc_type r_type;
3705 struct elf_link_hash_entry *h = NULL;
3706
3707 r_symndx = ELF32_R_SYM (rel->r_info);
3708 if (r_symndx >= symtab_hdr->sh_info)
3709 {
3710 struct ppc_elf_dyn_relocs **pp, *p;
3711 struct ppc_elf_link_hash_entry *eh;
3712
3713 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3714 while (h->root.type == bfd_link_hash_indirect
3715 || h->root.type == bfd_link_hash_warning)
3716 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3717 eh = (struct ppc_elf_link_hash_entry *) h;
3718
3719 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3720 if (p->sec == sec)
3721 {
3722 /* Everything must go for SEC. */
3723 *pp = p->next;
3724 break;
3725 }
3726 }
3727
3728 r_type = ELF32_R_TYPE (rel->r_info);
3729 switch (r_type)
3730 {
3731 case R_PPC_GOT_TLSLD16:
3732 case R_PPC_GOT_TLSLD16_LO:
3733 case R_PPC_GOT_TLSLD16_HI:
3734 case R_PPC_GOT_TLSLD16_HA:
3735 htab->tlsld_got.refcount -= 1;
3736 /* Fall thru */
3737
3738 case R_PPC_GOT_TLSGD16:
3739 case R_PPC_GOT_TLSGD16_LO:
3740 case R_PPC_GOT_TLSGD16_HI:
3741 case R_PPC_GOT_TLSGD16_HA:
3742 case R_PPC_GOT_TPREL16:
3743 case R_PPC_GOT_TPREL16_LO:
3744 case R_PPC_GOT_TPREL16_HI:
3745 case R_PPC_GOT_TPREL16_HA:
3746 case R_PPC_GOT_DTPREL16:
3747 case R_PPC_GOT_DTPREL16_LO:
3748 case R_PPC_GOT_DTPREL16_HI:
3749 case R_PPC_GOT_DTPREL16_HA:
3750 case R_PPC_GOT16:
3751 case R_PPC_GOT16_LO:
3752 case R_PPC_GOT16_HI:
3753 case R_PPC_GOT16_HA:
3754 if (h != NULL)
3755 {
3756 if (h->got.refcount > 0)
3757 h->got.refcount--;
3758 }
3759 else if (local_got_refcounts != NULL)
3760 {
3761 if (local_got_refcounts[r_symndx] > 0)
3762 local_got_refcounts[r_symndx]--;
3763 }
3764 break;
3765
3766 case R_PPC_REL24:
3767 case R_PPC_REL14:
3768 case R_PPC_REL14_BRTAKEN:
3769 case R_PPC_REL14_BRNTAKEN:
3770 case R_PPC_REL32:
3771 if (h == NULL || h == htab->elf.hgot)
3772 break;
3773 /* Fall thru */
3774
3775 case R_PPC_ADDR32:
3776 case R_PPC_ADDR24:
3777 case R_PPC_ADDR16:
3778 case R_PPC_ADDR16_LO:
3779 case R_PPC_ADDR16_HI:
3780 case R_PPC_ADDR16_HA:
3781 case R_PPC_ADDR14:
3782 case R_PPC_ADDR14_BRTAKEN:
3783 case R_PPC_ADDR14_BRNTAKEN:
3784 case R_PPC_UADDR32:
3785 case R_PPC_UADDR16:
3786 if (info->shared)
3787 break;
3788
3789 case R_PPC_PLT32:
3790 case R_PPC_PLTREL24:
3791 case R_PPC_PLTREL32:
3792 case R_PPC_PLT16_LO:
3793 case R_PPC_PLT16_HI:
3794 case R_PPC_PLT16_HA:
3795 if (h != NULL)
3796 {
3797 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3798 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3799 if (ent->plt.refcount > 0)
3800 ent->plt.refcount -= 1;
3801 }
3802 break;
3803
3804 default:
3805 break;
3806 }
3807 }
3808 return TRUE;
3809 }
3810 \f
3811 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3812
3813 asection *
3814 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3815 {
3816 struct ppc_elf_link_hash_table *htab;
3817
3818 htab = ppc_elf_hash_table (info);
3819 if (htab->plt_type == PLT_NEW
3820 && htab->plt != NULL
3821 && htab->plt->output_section != NULL)
3822 {
3823 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3824 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3825 }
3826
3827 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3828 FALSE, FALSE, TRUE);
3829 return _bfd_elf_tls_setup (obfd, info);
3830 }
3831
3832 /* Run through all the TLS relocs looking for optimization
3833 opportunities. */
3834
3835 bfd_boolean
3836 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3837 struct bfd_link_info *info)
3838 {
3839 bfd *ibfd;
3840 asection *sec;
3841 struct ppc_elf_link_hash_table *htab;
3842
3843 if (info->relocatable || info->shared)
3844 return TRUE;
3845
3846 htab = ppc_elf_hash_table (info);
3847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3848 {
3849 Elf_Internal_Sym *locsyms = NULL;
3850 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3851
3852 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3853 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3854 {
3855 Elf_Internal_Rela *relstart, *rel, *relend;
3856 int expecting_tls_get_addr;
3857
3858 /* Read the relocations. */
3859 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3860 info->keep_memory);
3861 if (relstart == NULL)
3862 return FALSE;
3863
3864 expecting_tls_get_addr = 0;
3865 relend = relstart + sec->reloc_count;
3866 for (rel = relstart; rel < relend; rel++)
3867 {
3868 enum elf_ppc_reloc_type r_type;
3869 unsigned long r_symndx;
3870 struct elf_link_hash_entry *h = NULL;
3871 char *tls_mask;
3872 char tls_set, tls_clear;
3873 bfd_boolean is_local;
3874
3875 r_symndx = ELF32_R_SYM (rel->r_info);
3876 if (r_symndx >= symtab_hdr->sh_info)
3877 {
3878 struct elf_link_hash_entry **sym_hashes;
3879
3880 sym_hashes = elf_sym_hashes (ibfd);
3881 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3882 while (h->root.type == bfd_link_hash_indirect
3883 || h->root.type == bfd_link_hash_warning)
3884 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3885 }
3886
3887 is_local = FALSE;
3888 if (h == NULL
3889 || !h->def_dynamic)
3890 is_local = TRUE;
3891
3892 r_type = ELF32_R_TYPE (rel->r_info);
3893 switch (r_type)
3894 {
3895 case R_PPC_GOT_TLSLD16:
3896 case R_PPC_GOT_TLSLD16_LO:
3897 case R_PPC_GOT_TLSLD16_HI:
3898 case R_PPC_GOT_TLSLD16_HA:
3899 /* These relocs should never be against a symbol
3900 defined in a shared lib. Leave them alone if
3901 that turns out to be the case. */
3902 expecting_tls_get_addr = 0;
3903 htab->tlsld_got.refcount -= 1;
3904 if (!is_local)
3905 continue;
3906
3907 /* LD -> LE */
3908 tls_set = 0;
3909 tls_clear = TLS_LD;
3910 expecting_tls_get_addr = 1;
3911 break;
3912
3913 case R_PPC_GOT_TLSGD16:
3914 case R_PPC_GOT_TLSGD16_LO:
3915 case R_PPC_GOT_TLSGD16_HI:
3916 case R_PPC_GOT_TLSGD16_HA:
3917 if (is_local)
3918 /* GD -> LE */
3919 tls_set = 0;
3920 else
3921 /* GD -> IE */
3922 tls_set = TLS_TLS | TLS_TPRELGD;
3923 tls_clear = TLS_GD;
3924 expecting_tls_get_addr = 1;
3925 break;
3926
3927 case R_PPC_GOT_TPREL16:
3928 case R_PPC_GOT_TPREL16_LO:
3929 case R_PPC_GOT_TPREL16_HI:
3930 case R_PPC_GOT_TPREL16_HA:
3931 expecting_tls_get_addr = 0;
3932 if (is_local)
3933 {
3934 /* IE -> LE */
3935 tls_set = 0;
3936 tls_clear = TLS_TPREL;
3937 break;
3938 }
3939 else
3940 continue;
3941
3942 case R_PPC_REL14:
3943 case R_PPC_REL14_BRTAKEN:
3944 case R_PPC_REL14_BRNTAKEN:
3945 case R_PPC_REL24:
3946 if (expecting_tls_get_addr
3947 && h != NULL
3948 && h == htab->tls_get_addr)
3949 {
3950 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3951 if (ent != NULL && ent->plt.refcount > 0)
3952 ent->plt.refcount -= 1;
3953 }
3954 expecting_tls_get_addr = 0;
3955 continue;
3956
3957 default:
3958 expecting_tls_get_addr = 0;
3959 continue;
3960 }
3961
3962 if (h != NULL)
3963 {
3964 if (tls_set == 0)
3965 {
3966 /* We managed to get rid of a got entry. */
3967 if (h->got.refcount > 0)
3968 h->got.refcount -= 1;
3969 }
3970 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3971 }
3972 else
3973 {
3974 Elf_Internal_Sym *sym;
3975 bfd_signed_vma *lgot_refs;
3976 char *lgot_masks;
3977
3978 if (locsyms == NULL)
3979 {
3980 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3981 if (locsyms == NULL)
3982 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3983 symtab_hdr->sh_info,
3984 0, NULL, NULL, NULL);
3985 if (locsyms == NULL)
3986 {
3987 if (elf_section_data (sec)->relocs != relstart)
3988 free (relstart);
3989 return FALSE;
3990 }
3991 }
3992 sym = locsyms + r_symndx;
3993 lgot_refs = elf_local_got_refcounts (ibfd);
3994 if (lgot_refs == NULL)
3995 abort ();
3996 if (tls_set == 0)
3997 {
3998 /* We managed to get rid of a got entry. */
3999 if (lgot_refs[r_symndx] > 0)
4000 lgot_refs[r_symndx] -= 1;
4001 }
4002 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4003 tls_mask = &lgot_masks[r_symndx];
4004 }
4005
4006 *tls_mask |= tls_set;
4007 *tls_mask &= ~tls_clear;
4008 }
4009
4010 if (elf_section_data (sec)->relocs != relstart)
4011 free (relstart);
4012 }
4013
4014 if (locsyms != NULL
4015 && (symtab_hdr->contents != (unsigned char *) locsyms))
4016 {
4017 if (!info->keep_memory)
4018 free (locsyms);
4019 else
4020 symtab_hdr->contents = (unsigned char *) locsyms;
4021 }
4022 }
4023 return TRUE;
4024 }
4025 \f
4026 /* Adjust a symbol defined by a dynamic object and referenced by a
4027 regular object. The current definition is in some section of the
4028 dynamic object, but we're not including those sections. We have to
4029 change the definition to something the rest of the link can
4030 understand. */
4031
4032 static bfd_boolean
4033 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4034 struct elf_link_hash_entry *h)
4035 {
4036 struct ppc_elf_link_hash_table *htab;
4037 asection *s;
4038 unsigned int power_of_two;
4039
4040 #ifdef DEBUG
4041 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4042 h->root.root.string);
4043 #endif
4044
4045 /* Make sure we know what is going on here. */
4046 htab = ppc_elf_hash_table (info);
4047 BFD_ASSERT (htab->elf.dynobj != NULL
4048 && (h->needs_plt
4049 || h->u.weakdef != NULL
4050 || (h->def_dynamic
4051 && h->ref_regular
4052 && !h->def_regular)));
4053
4054 /* Deal with function syms. */
4055 if (h->type == STT_FUNC
4056 || h->needs_plt)
4057 {
4058 /* Clear procedure linkage table information for any symbol that
4059 won't need a .plt entry. */
4060 struct plt_entry *ent;
4061 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4062 if (ent->plt.refcount > 0)
4063 break;
4064 if (ent == NULL
4065 || SYMBOL_CALLS_LOCAL (info, h)
4066 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4067 && h->root.type == bfd_link_hash_undefweak))
4068 {
4069 /* A PLT entry is not required/allowed when:
4070
4071 1. We are not using ld.so; because then the PLT entry
4072 can't be set up, so we can't use one. In this case,
4073 ppc_elf_adjust_dynamic_symbol won't even be called.
4074
4075 2. GC has rendered the entry unused.
4076
4077 3. We know for certain that a call to this symbol
4078 will go to this object, or will remain undefined. */
4079 h->plt.plist = NULL;
4080 h->needs_plt = 0;
4081 }
4082 return TRUE;
4083 }
4084 else
4085 h->plt.plist = NULL;
4086
4087 /* If this is a weak symbol, and there is a real definition, the
4088 processor independent code will have arranged for us to see the
4089 real definition first, and we can just use the same value. */
4090 if (h->u.weakdef != NULL)
4091 {
4092 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4093 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4094 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4095 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4096 if (ELIMINATE_COPY_RELOCS)
4097 h->non_got_ref = h->u.weakdef->non_got_ref;
4098 return TRUE;
4099 }
4100
4101 /* This is a reference to a symbol defined by a dynamic object which
4102 is not a function. */
4103
4104 /* If we are creating a shared library, we must presume that the
4105 only references to the symbol are via the global offset table.
4106 For such cases we need not do anything here; the relocations will
4107 be handled correctly by relocate_section. */
4108 if (info->shared)
4109 return TRUE;
4110
4111 /* If there are no references to this symbol that do not use the
4112 GOT, we don't need to generate a copy reloc. */
4113 if (!h->non_got_ref)
4114 return TRUE;
4115
4116 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4117 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4118 do this if there are any small data relocations. */
4119 if (ELIMINATE_COPY_RELOCS
4120 && !ppc_elf_hash_entry (h)->has_sda_refs)
4121 {
4122 struct ppc_elf_dyn_relocs *p;
4123 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4124 {
4125 s = p->sec->output_section;
4126 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4127 break;
4128 }
4129
4130 if (p == NULL)
4131 {
4132 h->non_got_ref = 0;
4133 return TRUE;
4134 }
4135 }
4136
4137 if (h->size == 0)
4138 {
4139 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4140 h->root.root.string);
4141 return TRUE;
4142 }
4143
4144 /* We must allocate the symbol in our .dynbss section, which will
4145 become part of the .bss section of the executable. There will be
4146 an entry for this symbol in the .dynsym section. The dynamic
4147 object will contain position independent code, so all references
4148 from the dynamic object to this symbol will go through the global
4149 offset table. The dynamic linker will use the .dynsym entry to
4150 determine the address it must put in the global offset table, so
4151 both the dynamic object and the regular object will refer to the
4152 same memory location for the variable.
4153
4154 Of course, if the symbol is referenced using SDAREL relocs, we
4155 must instead allocate it in .sbss. */
4156
4157 if (ppc_elf_hash_entry (h)->has_sda_refs)
4158 s = htab->dynsbss;
4159 else
4160 s = htab->dynbss;
4161 BFD_ASSERT (s != NULL);
4162
4163 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4164 copy the initial value out of the dynamic object and into the
4165 runtime process image. We need to remember the offset into the
4166 .rela.bss section we are going to use. */
4167 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4168 {
4169 asection *srel;
4170
4171 if (ppc_elf_hash_entry (h)->has_sda_refs)
4172 srel = htab->relsbss;
4173 else
4174 srel = htab->relbss;
4175 BFD_ASSERT (srel != NULL);
4176 srel->size += sizeof (Elf32_External_Rela);
4177 h->needs_copy = 1;
4178 }
4179
4180 /* We need to figure out the alignment required for this symbol. I
4181 have no idea how ELF linkers handle this. */
4182 power_of_two = bfd_log2 (h->size);
4183 if (power_of_two > 4)
4184 power_of_two = 4;
4185
4186 /* Apply the required alignment. */
4187 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4188 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4189 {
4190 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4191 return FALSE;
4192 }
4193
4194 /* Define the symbol as being at this point in the section. */
4195 h->root.u.def.section = s;
4196 h->root.u.def.value = s->size;
4197
4198 /* Increment the section size to make room for the symbol. */
4199 s->size += h->size;
4200
4201 return TRUE;
4202 }
4203 \f
4204 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4205 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4206 specifying the addend on the plt relocation. For -fpic code, the sym
4207 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4208 xxxxxxxx.got2.plt_pic32.<callee>. */
4209
4210 static bfd_boolean
4211 add_stub_sym (struct plt_entry *ent,
4212 struct elf_link_hash_entry *h,
4213 struct bfd_link_info *info)
4214 {
4215 struct elf_link_hash_entry *sh;
4216 size_t len1, len2, len3;
4217 char *name;
4218 const char *stub;
4219 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4220
4221 if (info->shared || info->pie)
4222 stub = ".plt_pic32.";
4223 else
4224 stub = ".plt_call32.";
4225
4226 len1 = strlen (h->root.root.string);
4227 len2 = strlen (stub);
4228 len3 = 0;
4229 if (ent->sec)
4230 len3 = strlen (ent->sec->name);
4231 name = bfd_malloc (len1 + len2 + len3 + 9);
4232 if (name == NULL)
4233 return FALSE;
4234 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4235 if (ent->sec)
4236 memcpy (name + 8, ent->sec->name, len3);
4237 memcpy (name + 8 + len3, stub, len2);
4238 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4239 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4240 if (sh == NULL)
4241 return FALSE;
4242 if (sh->root.type == bfd_link_hash_new)
4243 {
4244 sh->root.type = bfd_link_hash_defined;
4245 sh->root.u.def.section = htab->glink;
4246 sh->root.u.def.value = ent->glink_offset;
4247 sh->ref_regular = 1;
4248 sh->def_regular = 1;
4249 sh->ref_regular_nonweak = 1;
4250 sh->forced_local = 1;
4251 sh->non_elf = 0;
4252 }
4253 return TRUE;
4254 }
4255
4256 /* Allocate NEED contiguous space in .got, and return the offset.
4257 Handles allocation of the got header when crossing 32k. */
4258
4259 static bfd_vma
4260 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4261 {
4262 bfd_vma where;
4263 unsigned int max_before_header;
4264
4265 if (htab->plt_type == PLT_VXWORKS)
4266 {
4267 where = htab->got->size;
4268 htab->got->size += need;
4269 }
4270 else
4271 {
4272 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4273 if (need <= htab->got_gap)
4274 {
4275 where = max_before_header - htab->got_gap;
4276 htab->got_gap -= need;
4277 }
4278 else
4279 {
4280 if (htab->got->size + need > max_before_header
4281 && htab->got->size <= max_before_header)
4282 {
4283 htab->got_gap = max_before_header - htab->got->size;
4284 htab->got->size = max_before_header + htab->got_header_size;
4285 }
4286 where = htab->got->size;
4287 htab->got->size += need;
4288 }
4289 }
4290 return where;
4291 }
4292
4293 /* Allocate space in associated reloc sections for dynamic relocs. */
4294
4295 static bfd_boolean
4296 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4297 {
4298 struct bfd_link_info *info = inf;
4299 struct ppc_elf_link_hash_entry *eh;
4300 struct ppc_elf_link_hash_table *htab;
4301 struct ppc_elf_dyn_relocs *p;
4302
4303 if (h->root.type == bfd_link_hash_indirect)
4304 return TRUE;
4305
4306 if (h->root.type == bfd_link_hash_warning)
4307 /* When warning symbols are created, they **replace** the "real"
4308 entry in the hash table, thus we never get to see the real
4309 symbol in a hash traversal. So look at it now. */
4310 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4311
4312 htab = ppc_elf_hash_table (info);
4313 if (htab->elf.dynamic_sections_created)
4314 {
4315 struct plt_entry *ent;
4316 bfd_boolean doneone = FALSE;
4317 bfd_vma plt_offset = 0, glink_offset = 0;
4318
4319 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4320 if (ent->plt.refcount > 0)
4321 {
4322 /* Make sure this symbol is output as a dynamic symbol. */
4323 if (h->dynindx == -1
4324 && !h->forced_local)
4325 {
4326 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4327 return FALSE;
4328 }
4329
4330 if (info->shared
4331 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4332 {
4333 asection *s = htab->plt;
4334
4335 if (htab->plt_type == PLT_NEW)
4336 {
4337 if (!doneone)
4338 {
4339 plt_offset = s->size;
4340 s->size += 4;
4341 }
4342 ent->plt.offset = plt_offset;
4343
4344 s = htab->glink;
4345 if (!doneone || info->shared || info->pie)
4346 {
4347 glink_offset = s->size;
4348 s->size += GLINK_ENTRY_SIZE;
4349 }
4350 if (!doneone
4351 && !info->shared
4352 && !h->def_regular)
4353 {
4354 h->root.u.def.section = s;
4355 h->root.u.def.value = glink_offset;
4356 }
4357 ent->glink_offset = glink_offset;
4358
4359 if (htab->emit_stub_syms
4360 && !add_stub_sym (ent, h, info))
4361 return FALSE;
4362 }
4363 else
4364 {
4365 if (!doneone)
4366 {
4367 /* If this is the first .plt entry, make room
4368 for the special first entry. */
4369 if (s->size == 0)
4370 s->size += htab->plt_initial_entry_size;
4371
4372 /* The PowerPC PLT is actually composed of two
4373 parts, the first part is 2 words (for a load
4374 and a jump), and then there is a remaining
4375 word available at the end. */
4376 plt_offset = (htab->plt_initial_entry_size
4377 + (htab->plt_slot_size
4378 * ((s->size
4379 - htab->plt_initial_entry_size)
4380 / htab->plt_entry_size)));
4381
4382 /* If this symbol is not defined in a regular
4383 file, and we are not generating a shared
4384 library, then set the symbol to this location
4385 in the .plt. This is required to make
4386 function pointers compare as equal between
4387 the normal executable and the shared library. */
4388 if (! info->shared
4389 && !h->def_regular)
4390 {
4391 h->root.u.def.section = s;
4392 h->root.u.def.value = plt_offset;
4393 }
4394
4395 /* Make room for this entry. */
4396 s->size += htab->plt_entry_size;
4397 /* After the 8192nd entry, room for two entries
4398 is allocated. */
4399 if (htab->plt_type == PLT_OLD
4400 && (s->size - htab->plt_initial_entry_size)
4401 / htab->plt_entry_size
4402 > PLT_NUM_SINGLE_ENTRIES)
4403 s->size += htab->plt_entry_size;
4404 }
4405 ent->plt.offset = plt_offset;
4406 }
4407
4408 /* We also need to make an entry in the .rela.plt section. */
4409 if (!doneone)
4410 {
4411 htab->relplt->size += sizeof (Elf32_External_Rela);
4412
4413 if (htab->plt_type == PLT_VXWORKS)
4414 {
4415 /* Allocate space for the unloaded relocations. */
4416 if (!info->shared)
4417 {
4418 if (ent->plt.offset
4419 == (bfd_vma) htab->plt_initial_entry_size)
4420 {
4421 htab->srelplt2->size
4422 += sizeof (Elf32_External_Rela)
4423 * VXWORKS_PLTRESOLVE_RELOCS;
4424 }
4425
4426 htab->srelplt2->size
4427 += sizeof (Elf32_External_Rela)
4428 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4429 }
4430
4431 /* Every PLT entry has an associated GOT entry in
4432 .got.plt. */
4433 htab->sgotplt->size += 4;
4434 }
4435 doneone = TRUE;
4436 }
4437 }
4438 else
4439 ent->plt.offset = (bfd_vma) -1;
4440
4441 if (!doneone)
4442 {
4443 h->plt.plist = NULL;
4444 h->needs_plt = 0;
4445 }
4446 }
4447 }
4448 else
4449 {
4450 h->plt.plist = NULL;
4451 h->needs_plt = 0;
4452 }
4453
4454 eh = (struct ppc_elf_link_hash_entry *) h;
4455 if (eh->elf.got.refcount > 0)
4456 {
4457 /* Make sure this symbol is output as a dynamic symbol. */
4458 if (eh->elf.dynindx == -1
4459 && !eh->elf.forced_local)
4460 {
4461 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4462 return FALSE;
4463 }
4464
4465 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4466 && !eh->elf.def_dynamic)
4467 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4468 eh->elf.got.offset = (bfd_vma) -1;
4469 else
4470 {
4471 bfd_boolean dyn;
4472 unsigned int need = 0;
4473 if ((eh->tls_mask & TLS_TLS) != 0)
4474 {
4475 if ((eh->tls_mask & TLS_LD) != 0)
4476 need += 8;
4477 if ((eh->tls_mask & TLS_GD) != 0)
4478 need += 8;
4479 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4480 need += 4;
4481 if ((eh->tls_mask & TLS_DTPREL) != 0)
4482 need += 4;
4483 }
4484 else
4485 need += 4;
4486 eh->elf.got.offset = allocate_got (htab, need);
4487 dyn = htab->elf.dynamic_sections_created;
4488 if ((info->shared
4489 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4490 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4491 || eh->elf.root.type != bfd_link_hash_undefweak))
4492 {
4493 /* All the entries we allocated need relocs.
4494 Except LD only needs one. */
4495 if ((eh->tls_mask & TLS_LD) != 0)
4496 need -= 4;
4497 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4498 }
4499 }
4500 }
4501 else
4502 eh->elf.got.offset = (bfd_vma) -1;
4503
4504 if (eh->dyn_relocs == NULL)
4505 return TRUE;
4506
4507 /* In the shared -Bsymbolic case, discard space allocated for
4508 dynamic pc-relative relocs against symbols which turn out to be
4509 defined in regular objects. For the normal shared case, discard
4510 space for relocs that have become local due to symbol visibility
4511 changes. */
4512
4513 if (info->shared)
4514 {
4515 /* Relocs that use pc_count are those that appear on a call insn,
4516 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4517 generated via assembly. We want calls to protected symbols to
4518 resolve directly to the function rather than going via the plt.
4519 If people want function pointer comparisons to work as expected
4520 then they should avoid writing weird assembly. */
4521 if (SYMBOL_CALLS_LOCAL (info, h))
4522 {
4523 struct ppc_elf_dyn_relocs **pp;
4524
4525 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4526 {
4527 p->count -= p->pc_count;
4528 p->pc_count = 0;
4529 if (p->count == 0)
4530 *pp = p->next;
4531 else
4532 pp = &p->next;
4533 }
4534 }
4535
4536 /* Also discard relocs on undefined weak syms with non-default
4537 visibility. */
4538 if (eh->dyn_relocs != NULL
4539 && h->root.type == bfd_link_hash_undefweak)
4540 {
4541 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4542 eh->dyn_relocs = NULL;
4543
4544 /* Make sure undefined weak symbols are output as a dynamic
4545 symbol in PIEs. */
4546 else if (h->dynindx == -1
4547 && !h->forced_local)
4548 {
4549 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4550 return FALSE;
4551 }
4552 }
4553 }
4554 else if (ELIMINATE_COPY_RELOCS)
4555 {
4556 /* For the non-shared case, discard space for relocs against
4557 symbols which turn out to need copy relocs or are not
4558 dynamic. */
4559
4560 if (!h->non_got_ref
4561 && h->def_dynamic
4562 && !h->def_regular)
4563 {
4564 /* Make sure this symbol is output as a dynamic symbol.
4565 Undefined weak syms won't yet be marked as dynamic. */
4566 if (h->dynindx == -1
4567 && !h->forced_local)
4568 {
4569 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4570 return FALSE;
4571 }
4572
4573 /* If that succeeded, we know we'll be keeping all the
4574 relocs. */
4575 if (h->dynindx != -1)
4576 goto keep;
4577 }
4578
4579 eh->dyn_relocs = NULL;
4580
4581 keep: ;
4582 }
4583
4584 /* Finally, allocate space. */
4585 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4586 {
4587 asection *sreloc = elf_section_data (p->sec)->sreloc;
4588 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4589 }
4590
4591 return TRUE;
4592 }
4593
4594 /* Find any dynamic relocs that apply to read-only sections. */
4595
4596 static bfd_boolean
4597 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4598 {
4599 struct ppc_elf_dyn_relocs *p;
4600
4601 if (h->root.type == bfd_link_hash_indirect)
4602 return TRUE;
4603
4604 if (h->root.type == bfd_link_hash_warning)
4605 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4606
4607 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4608 {
4609 asection *s = p->sec->output_section;
4610
4611 if (s != NULL
4612 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4613 == (SEC_READONLY | SEC_ALLOC)))
4614 {
4615 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4616
4617 /* Not an error, just cut short the traversal. */
4618 return FALSE;
4619 }
4620 }
4621 return TRUE;
4622 }
4623
4624 /* Set the sizes of the dynamic sections. */
4625
4626 static bfd_boolean
4627 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4628 struct bfd_link_info *info)
4629 {
4630 struct ppc_elf_link_hash_table *htab;
4631 asection *s;
4632 bfd_boolean relocs;
4633 bfd *ibfd;
4634
4635 #ifdef DEBUG
4636 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4637 #endif
4638
4639 htab = ppc_elf_hash_table (info);
4640 BFD_ASSERT (htab->elf.dynobj != NULL);
4641
4642 if (elf_hash_table (info)->dynamic_sections_created)
4643 {
4644 /* Set the contents of the .interp section to the interpreter. */
4645 if (info->executable)
4646 {
4647 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4648 BFD_ASSERT (s != NULL);
4649 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4650 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4651 }
4652 }
4653
4654 if (htab->plt_type == PLT_OLD)
4655 htab->got_header_size = 16;
4656 else if (htab->plt_type == PLT_NEW)
4657 htab->got_header_size = 12;
4658
4659 /* Set up .got offsets for local syms, and space for local dynamic
4660 relocs. */
4661 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4662 {
4663 bfd_signed_vma *local_got;
4664 bfd_signed_vma *end_local_got;
4665 char *lgot_masks;
4666 bfd_size_type locsymcount;
4667 Elf_Internal_Shdr *symtab_hdr;
4668
4669 if (!is_ppc_elf_target (ibfd->xvec))
4670 continue;
4671
4672 for (s = ibfd->sections; s != NULL; s = s->next)
4673 {
4674 struct ppc_elf_dyn_relocs *p;
4675
4676 for (p = ((struct ppc_elf_dyn_relocs *)
4677 elf_section_data (s)->local_dynrel);
4678 p != NULL;
4679 p = p->next)
4680 {
4681 if (!bfd_is_abs_section (p->sec)
4682 && bfd_is_abs_section (p->sec->output_section))
4683 {
4684 /* Input section has been discarded, either because
4685 it is a copy of a linkonce section or due to
4686 linker script /DISCARD/, so we'll be discarding
4687 the relocs too. */
4688 }
4689 else if (p->count != 0)
4690 {
4691 elf_section_data (p->sec)->sreloc->size
4692 += p->count * sizeof (Elf32_External_Rela);
4693 if ((p->sec->output_section->flags
4694 & (SEC_READONLY | SEC_ALLOC))
4695 == (SEC_READONLY | SEC_ALLOC))
4696 info->flags |= DF_TEXTREL;
4697 }
4698 }
4699 }
4700
4701 local_got = elf_local_got_refcounts (ibfd);
4702 if (!local_got)
4703 continue;
4704
4705 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4706 locsymcount = symtab_hdr->sh_info;
4707 end_local_got = local_got + locsymcount;
4708 lgot_masks = (char *) end_local_got;
4709 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4710 if (*local_got > 0)
4711 {
4712 if (*lgot_masks == (TLS_TLS | TLS_LD))
4713 {
4714 /* If just an LD reloc, we'll just use
4715 htab->tlsld_got.offset. */
4716 htab->tlsld_got.refcount += 1;
4717 *local_got = (bfd_vma) -1;
4718 }
4719 else
4720 {
4721 unsigned int need = 0;
4722 if ((*lgot_masks & TLS_TLS) != 0)
4723 {
4724 if ((*lgot_masks & TLS_GD) != 0)
4725 need += 8;
4726 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4727 need += 4;
4728 if ((*lgot_masks & TLS_DTPREL) != 0)
4729 need += 4;
4730 }
4731 else
4732 need += 4;
4733 *local_got = allocate_got (htab, need);
4734 if (info->shared)
4735 htab->relgot->size += (need
4736 * (sizeof (Elf32_External_Rela) / 4));
4737 }
4738 }
4739 else
4740 *local_got = (bfd_vma) -1;
4741 }
4742
4743 if (htab->tlsld_got.refcount > 0)
4744 {
4745 htab->tlsld_got.offset = allocate_got (htab, 8);
4746 if (info->shared)
4747 htab->relgot->size += sizeof (Elf32_External_Rela);
4748 }
4749 else
4750 htab->tlsld_got.offset = (bfd_vma) -1;
4751
4752 /* Allocate space for global sym dynamic relocs. */
4753 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4754
4755 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4756 {
4757 unsigned int g_o_t = 32768;
4758
4759 /* If we haven't allocated the header, do so now. When we get here,
4760 for old plt/got the got size will be 0 to 32764 (not allocated),
4761 or 32780 to 65536 (header allocated). For new plt/got, the
4762 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4763 if (htab->got->size <= 32768)
4764 {
4765 g_o_t = htab->got->size;
4766 if (htab->plt_type == PLT_OLD)
4767 g_o_t += 4;
4768 htab->got->size += htab->got_header_size;
4769 }
4770
4771 htab->elf.hgot->root.u.def.value = g_o_t;
4772 }
4773
4774 if (htab->glink != NULL && htab->glink->size != 0)
4775 {
4776 htab->glink_pltresolve = htab->glink->size;
4777 /* Space for the branch table. */
4778 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4779 /* Pad out to align the start of PLTresolve. */
4780 htab->glink->size += -htab->glink->size & 15;
4781 htab->glink->size += GLINK_PLTRESOLVE;
4782
4783 if (htab->emit_stub_syms)
4784 {
4785 struct elf_link_hash_entry *sh;
4786 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4787 TRUE, FALSE, FALSE);
4788 if (sh == NULL)
4789 return FALSE;
4790 if (sh->root.type == bfd_link_hash_new)
4791 {
4792 sh->root.type = bfd_link_hash_defined;
4793 sh->root.u.def.section = htab->glink;
4794 sh->root.u.def.value = htab->glink_pltresolve;
4795 sh->ref_regular = 1;
4796 sh->def_regular = 1;
4797 sh->ref_regular_nonweak = 1;
4798 sh->forced_local = 1;
4799 sh->non_elf = 0;
4800 }
4801 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4802 TRUE, FALSE, FALSE);
4803 if (sh == NULL)
4804 return FALSE;
4805 if (sh->root.type == bfd_link_hash_new)
4806 {
4807 sh->root.type = bfd_link_hash_defined;
4808 sh->root.u.def.section = htab->glink;
4809 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4810 sh->ref_regular = 1;
4811 sh->def_regular = 1;
4812 sh->ref_regular_nonweak = 1;
4813 sh->forced_local = 1;
4814 sh->non_elf = 0;
4815 }
4816 }
4817 }
4818
4819 /* We've now determined the sizes of the various dynamic sections.
4820 Allocate memory for them. */
4821 relocs = FALSE;
4822 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4823 {
4824 bfd_boolean strip_section = TRUE;
4825
4826 if ((s->flags & SEC_LINKER_CREATED) == 0)
4827 continue;
4828
4829 if (s == htab->plt
4830 || s == htab->glink
4831 || s == htab->got
4832 || s == htab->sgotplt
4833 || s == htab->sbss
4834 || s == htab->dynbss
4835 || s == htab->dynsbss)
4836 {
4837 /* We'd like to strip these sections if they aren't needed, but if
4838 we've exported dynamic symbols from them we must leave them.
4839 It's too late to tell BFD to get rid of the symbols. */
4840 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4841 strip_section = FALSE;
4842 /* Strip this section if we don't need it; see the
4843 comment below. */
4844 }
4845 else if (s == htab->sdata[0].section
4846 || s == htab->sdata[1].section)
4847 {
4848 /* Strip these too. */
4849 }
4850 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
4851 {
4852 if (s->size != 0)
4853 {
4854 /* Remember whether there are any relocation sections. */
4855 relocs = TRUE;
4856
4857 /* We use the reloc_count field as a counter if we need
4858 to copy relocs into the output file. */
4859 s->reloc_count = 0;
4860 }
4861 }
4862 else
4863 {
4864 /* It's not one of our sections, so don't allocate space. */
4865 continue;
4866 }
4867
4868 if (s->size == 0 && strip_section)
4869 {
4870 /* If we don't need this section, strip it from the
4871 output file. This is mostly to handle .rela.bss and
4872 .rela.plt. We must create both sections in
4873 create_dynamic_sections, because they must be created
4874 before the linker maps input sections to output
4875 sections. The linker does that before
4876 adjust_dynamic_symbol is called, and it is that
4877 function which decides whether anything needs to go
4878 into these sections. */
4879 s->flags |= SEC_EXCLUDE;
4880 continue;
4881 }
4882
4883 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4884 continue;
4885
4886 /* Allocate memory for the section contents. */
4887 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4888 if (s->contents == NULL)
4889 return FALSE;
4890 }
4891
4892 if (htab->elf.dynamic_sections_created)
4893 {
4894 /* Add some entries to the .dynamic section. We fill in the
4895 values later, in ppc_elf_finish_dynamic_sections, but we
4896 must add the entries now so that we get the correct size for
4897 the .dynamic section. The DT_DEBUG entry is filled in by the
4898 dynamic linker and used by the debugger. */
4899 #define add_dynamic_entry(TAG, VAL) \
4900 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4901
4902 if (info->executable)
4903 {
4904 if (!add_dynamic_entry (DT_DEBUG, 0))
4905 return FALSE;
4906 }
4907
4908 if (htab->plt != NULL && htab->plt->size != 0)
4909 {
4910 if (!add_dynamic_entry (DT_PLTGOT, 0)
4911 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4912 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4913 || !add_dynamic_entry (DT_JMPREL, 0))
4914 return FALSE;
4915 }
4916
4917 if (htab->glink != NULL && htab->glink->size != 0)
4918 {
4919 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4920 return FALSE;
4921 }
4922
4923 if (relocs)
4924 {
4925 if (!add_dynamic_entry (DT_RELA, 0)
4926 || !add_dynamic_entry (DT_RELASZ, 0)
4927 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4928 return FALSE;
4929 }
4930
4931 /* If any dynamic relocs apply to a read-only section, then we
4932 need a DT_TEXTREL entry. */
4933 if ((info->flags & DF_TEXTREL) == 0)
4934 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4935 info);
4936
4937 if ((info->flags & DF_TEXTREL) != 0)
4938 {
4939 if (!add_dynamic_entry (DT_TEXTREL, 0))
4940 return FALSE;
4941 }
4942 }
4943 #undef add_dynamic_entry
4944
4945 return TRUE;
4946 }
4947 \f
4948 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4949
4950 static const int shared_stub_entry[] =
4951 {
4952 0x7c0802a6, /* mflr 0 */
4953 0x429f0005, /* bcl 20, 31, .Lxxx */
4954 0x7d6802a6, /* mflr 11 */
4955 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4956 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4957 0x7c0803a6, /* mtlr 0 */
4958 0x7d6903a6, /* mtctr 11 */
4959 0x4e800420, /* bctr */
4960 };
4961
4962 static const int stub_entry[] =
4963 {
4964 0x3d600000, /* lis 11,xxx@ha */
4965 0x396b0000, /* addi 11,11,xxx@l */
4966 0x7d6903a6, /* mtctr 11 */
4967 0x4e800420, /* bctr */
4968 };
4969
4970 static bfd_boolean
4971 ppc_elf_relax_section (bfd *abfd,
4972 asection *isec,
4973 struct bfd_link_info *link_info,
4974 bfd_boolean *again)
4975 {
4976 struct one_fixup
4977 {
4978 struct one_fixup *next;
4979 asection *tsec;
4980 bfd_vma toff;
4981 bfd_vma trampoff;
4982 };
4983
4984 Elf_Internal_Shdr *symtab_hdr;
4985 bfd_byte *contents = NULL;
4986 Elf_Internal_Sym *isymbuf = NULL;
4987 Elf_Internal_Rela *internal_relocs = NULL;
4988 Elf_Internal_Rela *irel, *irelend;
4989 struct one_fixup *fixups = NULL;
4990 bfd_boolean changed;
4991 struct ppc_elf_link_hash_table *htab;
4992 bfd_size_type trampoff;
4993 asection *got2;
4994
4995 *again = FALSE;
4996
4997 /* Nothing to do if there are no relocations, and no need to do
4998 anything with non-alloc sections. */
4999 if ((isec->flags & SEC_ALLOC) == 0
5000 || (isec->flags & SEC_RELOC) == 0
5001 || isec->reloc_count == 0)
5002 return TRUE;
5003
5004 trampoff = (isec->size + 3) & (bfd_vma) -4;
5005 /* Space for a branch around any trampolines. */
5006 trampoff += 4;
5007
5008 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5009
5010 /* Get a copy of the native relocations. */
5011 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5012 link_info->keep_memory);
5013 if (internal_relocs == NULL)
5014 goto error_return;
5015
5016 htab = ppc_elf_hash_table (link_info);
5017 got2 = bfd_get_section_by_name (abfd, ".got2");
5018
5019 irelend = internal_relocs + isec->reloc_count;
5020 for (irel = internal_relocs; irel < irelend; irel++)
5021 {
5022 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5023 bfd_vma symaddr, reladdr, toff, roff;
5024 asection *tsec;
5025 struct one_fixup *f;
5026 size_t insn_offset = 0;
5027 bfd_vma max_branch_offset, val;
5028 bfd_byte *hit_addr;
5029 unsigned long t0;
5030 unsigned char sym_type;
5031
5032 switch (r_type)
5033 {
5034 case R_PPC_REL24:
5035 case R_PPC_LOCAL24PC:
5036 case R_PPC_PLTREL24:
5037 max_branch_offset = 1 << 25;
5038 break;
5039
5040 case R_PPC_REL14:
5041 case R_PPC_REL14_BRTAKEN:
5042 case R_PPC_REL14_BRNTAKEN:
5043 max_branch_offset = 1 << 15;
5044 break;
5045
5046 default:
5047 continue;
5048 }
5049
5050 /* Get the value of the symbol referred to by the reloc. */
5051 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5052 {
5053 /* A local symbol. */
5054 Elf_Internal_Sym *isym;
5055
5056 /* Read this BFD's local symbols. */
5057 if (isymbuf == NULL)
5058 {
5059 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5060 if (isymbuf == NULL)
5061 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5062 symtab_hdr->sh_info, 0,
5063 NULL, NULL, NULL);
5064 if (isymbuf == 0)
5065 goto error_return;
5066 }
5067 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5068 if (isym->st_shndx == SHN_UNDEF)
5069 continue; /* We can't do anything with undefined symbols. */
5070 else if (isym->st_shndx == SHN_ABS)
5071 tsec = bfd_abs_section_ptr;
5072 else if (isym->st_shndx == SHN_COMMON)
5073 tsec = bfd_com_section_ptr;
5074 else
5075 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5076
5077 toff = isym->st_value;
5078 sym_type = ELF_ST_TYPE (isym->st_info);
5079 }
5080 else
5081 {
5082 /* Global symbol handling. */
5083 unsigned long indx;
5084 struct elf_link_hash_entry *h;
5085
5086 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5087 h = elf_sym_hashes (abfd)[indx];
5088
5089 while (h->root.type == bfd_link_hash_indirect
5090 || h->root.type == bfd_link_hash_warning)
5091 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5092
5093 tsec = NULL;
5094 toff = 0;
5095 if (r_type == R_PPC_PLTREL24
5096 && htab->plt != NULL)
5097 {
5098 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5099
5100 if (ent != NULL)
5101 {
5102 if (htab->plt_type == PLT_NEW)
5103 {
5104 tsec = htab->glink;
5105 toff = ent->glink_offset;
5106 }
5107 else
5108 {
5109 tsec = htab->plt;
5110 toff = ent->plt.offset;
5111 }
5112 }
5113 }
5114 if (tsec != NULL)
5115 ;
5116 else if (h->root.type == bfd_link_hash_defined
5117 || h->root.type == bfd_link_hash_defweak)
5118 {
5119 tsec = h->root.u.def.section;
5120 toff = h->root.u.def.value;
5121 }
5122 else
5123 continue;
5124
5125 sym_type = h->type;
5126 }
5127
5128 /* If the branch and target are in the same section, you have
5129 no hope of adding stubs. We'll error out later should the
5130 branch overflow. */
5131 if (tsec == isec)
5132 continue;
5133
5134 /* There probably isn't any reason to handle symbols in
5135 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5136 attribute for a code section, and we are only looking at
5137 branches. However, implement it correctly here as a
5138 reference for other target relax_section functions. */
5139 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5140 {
5141 /* At this stage in linking, no SEC_MERGE symbol has been
5142 adjusted, so all references to such symbols need to be
5143 passed through _bfd_merged_section_offset. (Later, in
5144 relocate_section, all SEC_MERGE symbols *except* for
5145 section symbols have been adjusted.)
5146
5147 gas may reduce relocations against symbols in SEC_MERGE
5148 sections to a relocation against the section symbol when
5149 the original addend was zero. When the reloc is against
5150 a section symbol we should include the addend in the
5151 offset passed to _bfd_merged_section_offset, since the
5152 location of interest is the original symbol. On the
5153 other hand, an access to "sym+addend" where "sym" is not
5154 a section symbol should not include the addend; Such an
5155 access is presumed to be an offset from "sym"; The
5156 location of interest is just "sym". */
5157 if (sym_type == STT_SECTION)
5158 toff += irel->r_addend;
5159
5160 toff = _bfd_merged_section_offset (abfd, &tsec,
5161 elf_section_data (tsec)->sec_info,
5162 toff);
5163
5164 if (sym_type != STT_SECTION)
5165 toff += irel->r_addend;
5166 }
5167 /* PLTREL24 addends are special. */
5168 else if (r_type != R_PPC_PLTREL24)
5169 toff += irel->r_addend;
5170
5171 /* Attempted -shared link of non-pic code loses. */
5172 if (tsec->output_section == NULL)
5173 continue;
5174
5175 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5176
5177 roff = irel->r_offset;
5178 reladdr = isec->output_section->vma + isec->output_offset + roff;
5179
5180 /* If the branch is in range, no need to do anything. */
5181 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5182 continue;
5183
5184 /* Look for an existing fixup to this address. */
5185 for (f = fixups; f ; f = f->next)
5186 if (f->tsec == tsec && f->toff == toff)
5187 break;
5188
5189 if (f == NULL)
5190 {
5191 size_t size;
5192 unsigned long stub_rtype;
5193
5194 val = trampoff - roff;
5195 if (val >= max_branch_offset)
5196 /* Oh dear, we can't reach a trampoline. Don't try to add
5197 one. We'll report an error later. */
5198 continue;
5199
5200 if (link_info->shared)
5201 {
5202 size = 4 * ARRAY_SIZE (shared_stub_entry);
5203 insn_offset = 12;
5204 stub_rtype = R_PPC_RELAX32PC;
5205 }
5206 else
5207 {
5208 size = 4 * ARRAY_SIZE (stub_entry);
5209 insn_offset = 0;
5210 stub_rtype = R_PPC_RELAX32;
5211 }
5212
5213 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5214 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5215 abort ();
5216 if (tsec == htab->plt
5217 || tsec == htab->glink)
5218 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5219
5220 /* Hijack the old relocation. Since we need two
5221 relocations for this use a "composite" reloc. */
5222 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5223 stub_rtype);
5224 irel->r_offset = trampoff + insn_offset;
5225
5226 /* Record the fixup so we don't do it again this section. */
5227 f = bfd_malloc (sizeof (*f));
5228 f->next = fixups;
5229 f->tsec = tsec;
5230 f->toff = toff;
5231 f->trampoff = trampoff;
5232 fixups = f;
5233
5234 trampoff += size;
5235 }
5236 else
5237 {
5238 val = f->trampoff - roff;
5239 if (val >= max_branch_offset)
5240 continue;
5241
5242 /* Nop out the reloc, since we're finalizing things here. */
5243 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5244 }
5245
5246 /* Get the section contents. */
5247 if (contents == NULL)
5248 {
5249 /* Get cached copy if it exists. */
5250 if (elf_section_data (isec)->this_hdr.contents != NULL)
5251 contents = elf_section_data (isec)->this_hdr.contents;
5252 else
5253 {
5254 /* Go get them off disk. */
5255 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5256 goto error_return;
5257 }
5258 }
5259
5260 /* Fix up the existing branch to hit the trampoline. */
5261 hit_addr = contents + roff;
5262 switch (r_type)
5263 {
5264 case R_PPC_REL24:
5265 case R_PPC_LOCAL24PC:
5266 case R_PPC_PLTREL24:
5267 t0 = bfd_get_32 (abfd, hit_addr);
5268 t0 &= ~0x3fffffc;
5269 t0 |= val & 0x3fffffc;
5270 bfd_put_32 (abfd, t0, hit_addr);
5271 break;
5272
5273 case R_PPC_REL14:
5274 case R_PPC_REL14_BRTAKEN:
5275 case R_PPC_REL14_BRNTAKEN:
5276 t0 = bfd_get_32 (abfd, hit_addr);
5277 t0 &= ~0xfffc;
5278 t0 |= val & 0xfffc;
5279 bfd_put_32 (abfd, t0, hit_addr);
5280 break;
5281 }
5282 }
5283
5284 /* Write out the trampolines. */
5285 changed = fixups != NULL;
5286 if (fixups != NULL)
5287 {
5288 const int *stub;
5289 bfd_byte *dest;
5290 bfd_vma val;
5291 int i, size;
5292
5293 do
5294 {
5295 struct one_fixup *f = fixups;
5296 fixups = fixups->next;
5297 free (f);
5298 }
5299 while (fixups);
5300
5301 contents = bfd_realloc (contents, trampoff);
5302 if (contents == NULL)
5303 goto error_return;
5304
5305 isec->size = (isec->size + 3) & (bfd_vma) -4;
5306 /* Branch around the trampolines. */
5307 val = trampoff - isec->size + 0x48000000;
5308 dest = contents + isec->size;
5309 isec->size = trampoff;
5310 bfd_put_32 (abfd, val, dest);
5311 dest += 4;
5312
5313 if (link_info->shared)
5314 {
5315 stub = shared_stub_entry;
5316 size = ARRAY_SIZE (shared_stub_entry);
5317 }
5318 else
5319 {
5320 stub = stub_entry;
5321 size = ARRAY_SIZE (stub_entry);
5322 }
5323
5324 i = 0;
5325 while (dest < contents + trampoff)
5326 {
5327 bfd_put_32 (abfd, stub[i], dest);
5328 i++;
5329 if (i == size)
5330 i = 0;
5331 dest += 4;
5332 }
5333 BFD_ASSERT (i == 0);
5334 }
5335
5336 if (isymbuf != NULL
5337 && symtab_hdr->contents != (unsigned char *) isymbuf)
5338 {
5339 if (! link_info->keep_memory)
5340 free (isymbuf);
5341 else
5342 {
5343 /* Cache the symbols for elf_link_input_bfd. */
5344 symtab_hdr->contents = (unsigned char *) isymbuf;
5345 }
5346 }
5347
5348 if (contents != NULL
5349 && elf_section_data (isec)->this_hdr.contents != contents)
5350 {
5351 if (!changed && !link_info->keep_memory)
5352 free (contents);
5353 else
5354 {
5355 /* Cache the section contents for elf_link_input_bfd. */
5356 elf_section_data (isec)->this_hdr.contents = contents;
5357 }
5358 }
5359
5360 if (elf_section_data (isec)->relocs != internal_relocs)
5361 {
5362 if (!changed)
5363 free (internal_relocs);
5364 else
5365 elf_section_data (isec)->relocs = internal_relocs;
5366 }
5367
5368 *again = changed;
5369 return TRUE;
5370
5371 error_return:
5372 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5373 free (isymbuf);
5374 if (contents != NULL
5375 && elf_section_data (isec)->this_hdr.contents != contents)
5376 free (contents);
5377 if (internal_relocs != NULL
5378 && elf_section_data (isec)->relocs != internal_relocs)
5379 free (internal_relocs);
5380 return FALSE;
5381 }
5382 \f
5383 /* What to do when ld finds relocations against symbols defined in
5384 discarded sections. */
5385
5386 static unsigned int
5387 ppc_elf_action_discarded (asection *sec)
5388 {
5389 if (strcmp (".fixup", sec->name) == 0)
5390 return 0;
5391
5392 if (strcmp (".got2", sec->name) == 0)
5393 return 0;
5394
5395 return _bfd_elf_default_action_discarded (sec);
5396 }
5397 \f
5398 /* Fill in the address for a pointer generated in a linker section. */
5399
5400 static bfd_vma
5401 elf_finish_pointer_linker_section (bfd *input_bfd,
5402 elf_linker_section_t *lsect,
5403 struct elf_link_hash_entry *h,
5404 bfd_vma relocation,
5405 const Elf_Internal_Rela *rel)
5406 {
5407 elf_linker_section_pointers_t *linker_section_ptr;
5408
5409 BFD_ASSERT (lsect != NULL);
5410
5411 if (h != NULL)
5412 {
5413 /* Handle global symbol. */
5414 struct ppc_elf_link_hash_entry *eh;
5415
5416 eh = (struct ppc_elf_link_hash_entry *) h;
5417 BFD_ASSERT (eh->elf.def_regular);
5418 linker_section_ptr = eh->linker_section_pointer;
5419 }
5420 else
5421 {
5422 /* Handle local symbol. */
5423 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5424
5425 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5426 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5427 }
5428
5429 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5430 rel->r_addend,
5431 lsect);
5432 BFD_ASSERT (linker_section_ptr != NULL);
5433
5434 /* Offset will always be a multiple of four, so use the bottom bit
5435 as a "written" flag. */
5436 if ((linker_section_ptr->offset & 1) == 0)
5437 {
5438 bfd_put_32 (lsect->section->owner,
5439 relocation + linker_section_ptr->addend,
5440 lsect->section->contents + linker_section_ptr->offset);
5441 linker_section_ptr->offset += 1;
5442 }
5443
5444 relocation = (lsect->section->output_offset
5445 + linker_section_ptr->offset - 1
5446 - 0x8000);
5447
5448 #ifdef DEBUG
5449 fprintf (stderr,
5450 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5451 lsect->name, (long) relocation, (long) relocation);
5452 #endif
5453
5454 /* Subtract out the addend, because it will get added back in by the normal
5455 processing. */
5456 return relocation - linker_section_ptr->addend;
5457 }
5458
5459 /* The RELOCATE_SECTION function is called by the ELF backend linker
5460 to handle the relocations for a section.
5461
5462 The relocs are always passed as Rela structures; if the section
5463 actually uses Rel structures, the r_addend field will always be
5464 zero.
5465
5466 This function is responsible for adjust the section contents as
5467 necessary, and (if using Rela relocs and generating a
5468 relocatable output file) adjusting the reloc addend as
5469 necessary.
5470
5471 This function does not have to worry about setting the reloc
5472 address or the reloc symbol index.
5473
5474 LOCAL_SYMS is a pointer to the swapped in local symbols.
5475
5476 LOCAL_SECTIONS is an array giving the section in the input file
5477 corresponding to the st_shndx field of each local symbol.
5478
5479 The global hash table entry for the global symbols can be found
5480 via elf_sym_hashes (input_bfd).
5481
5482 When generating relocatable output, this function must handle
5483 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5484 going to be the section symbol corresponding to the output
5485 section, which means that the addend must be adjusted
5486 accordingly. */
5487
5488 static bfd_boolean
5489 ppc_elf_relocate_section (bfd *output_bfd,
5490 struct bfd_link_info *info,
5491 bfd *input_bfd,
5492 asection *input_section,
5493 bfd_byte *contents,
5494 Elf_Internal_Rela *relocs,
5495 Elf_Internal_Sym *local_syms,
5496 asection **local_sections)
5497 {
5498 Elf_Internal_Shdr *symtab_hdr;
5499 struct elf_link_hash_entry **sym_hashes;
5500 struct ppc_elf_link_hash_table *htab;
5501 Elf_Internal_Rela *rel;
5502 Elf_Internal_Rela *relend;
5503 Elf_Internal_Rela outrel;
5504 bfd_byte *loc;
5505 asection *got2, *sreloc = NULL;
5506 bfd_vma *local_got_offsets;
5507 bfd_boolean ret = TRUE;
5508 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5509
5510 #ifdef DEBUG
5511 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5512 "%ld relocations%s",
5513 input_bfd, input_section,
5514 (long) input_section->reloc_count,
5515 (info->relocatable) ? " (relocatable)" : "");
5516 #endif
5517
5518 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5519
5520 if (info->relocatable)
5521 {
5522 if (got2 == NULL)
5523 return TRUE;
5524
5525 rel = relocs;
5526 relend = relocs + input_section->reloc_count;
5527 for (; rel < relend; rel++)
5528 {
5529 enum elf_ppc_reloc_type r_type;
5530
5531 r_type = ELF32_R_TYPE (rel->r_info);
5532 if (r_type == R_PPC_PLTREL24
5533 && rel->r_addend >= 32768)
5534 {
5535 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5536 addend specifies the GOT pointer offset within .got2. */
5537 rel->r_addend += got2->output_offset;
5538 }
5539 }
5540 return TRUE;
5541 }
5542
5543 /* Initialize howto table if not already done. */
5544 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5545 ppc_elf_howto_init ();
5546
5547 htab = ppc_elf_hash_table (info);
5548 local_got_offsets = elf_local_got_offsets (input_bfd);
5549 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5550 sym_hashes = elf_sym_hashes (input_bfd);
5551 rel = relocs;
5552 relend = relocs + input_section->reloc_count;
5553 for (; rel < relend; rel++)
5554 {
5555 enum elf_ppc_reloc_type r_type;
5556 bfd_vma addend;
5557 bfd_reloc_status_type r;
5558 Elf_Internal_Sym *sym;
5559 asection *sec;
5560 struct elf_link_hash_entry *h;
5561 const char *sym_name;
5562 reloc_howto_type *howto;
5563 unsigned long r_symndx;
5564 bfd_vma relocation;
5565 bfd_vma branch_bit, insn, from;
5566 bfd_boolean unresolved_reloc;
5567 bfd_boolean warned;
5568 unsigned int tls_type, tls_mask, tls_gd;
5569
5570 r_type = ELF32_R_TYPE (rel->r_info);
5571 sym = NULL;
5572 sec = NULL;
5573 h = NULL;
5574 unresolved_reloc = FALSE;
5575 warned = FALSE;
5576 r_symndx = ELF32_R_SYM (rel->r_info);
5577
5578 if (r_symndx < symtab_hdr->sh_info)
5579 {
5580 sym = local_syms + r_symndx;
5581 sec = local_sections[r_symndx];
5582 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5583
5584 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5585 }
5586 else
5587 {
5588 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5589 r_symndx, symtab_hdr, sym_hashes,
5590 h, sec, relocation,
5591 unresolved_reloc, warned);
5592
5593 sym_name = h->root.root.string;
5594 }
5595
5596 /* TLS optimizations. Replace instruction sequences and relocs
5597 based on information we collected in tls_optimize. We edit
5598 RELOCS so that --emit-relocs will output something sensible
5599 for the final instruction stream. */
5600 tls_mask = 0;
5601 tls_gd = 0;
5602 if (IS_PPC_TLS_RELOC (r_type))
5603 {
5604 if (h != NULL)
5605 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5606 else if (local_got_offsets != NULL)
5607 {
5608 char *lgot_masks;
5609 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5610 tls_mask = lgot_masks[r_symndx];
5611 }
5612 }
5613
5614 /* Ensure reloc mapping code below stays sane. */
5615 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5616 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5617 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5618 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5619 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5620 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5621 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5622 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5623 abort ();
5624 switch (r_type)
5625 {
5626 default:
5627 break;
5628
5629 case R_PPC_GOT_TPREL16:
5630 case R_PPC_GOT_TPREL16_LO:
5631 if (tls_mask != 0
5632 && (tls_mask & TLS_TPREL) == 0)
5633 {
5634 bfd_vma insn;
5635 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5636 insn &= 31 << 21;
5637 insn |= 0x3c020000; /* addis 0,2,0 */
5638 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5639 r_type = R_PPC_TPREL16_HA;
5640 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5641 }
5642 break;
5643
5644 case R_PPC_TLS:
5645 if (tls_mask != 0
5646 && (tls_mask & TLS_TPREL) == 0)
5647 {
5648 bfd_vma insn, rtra;
5649 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5650 if ((insn & ((31 << 26) | (31 << 11)))
5651 == ((31 << 26) | (2 << 11)))
5652 rtra = insn & ((1 << 26) - (1 << 16));
5653 else if ((insn & ((31 << 26) | (31 << 16)))
5654 == ((31 << 26) | (2 << 16)))
5655 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5656 else
5657 abort ();
5658 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5659 /* add -> addi. */
5660 insn = 14 << 26;
5661 else if ((insn & (31 << 1)) == 23 << 1
5662 && ((insn & (31 << 6)) < 14 << 6
5663 || ((insn & (31 << 6)) >= 16 << 6
5664 && (insn & (31 << 6)) < 24 << 6)))
5665 /* load and store indexed -> dform. */
5666 insn = (32 | ((insn >> 6) & 31)) << 26;
5667 else if ((insn & (31 << 1)) == 21 << 1
5668 && (insn & (0x1a << 6)) == 0)
5669 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5670 insn = (((58 | ((insn >> 6) & 4)) << 26)
5671 | ((insn >> 6) & 1));
5672 else if ((insn & (31 << 1)) == 21 << 1
5673 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5674 /* lwax -> lwa. */
5675 insn = (58 << 26) | 2;
5676 else
5677 abort ();
5678 insn |= rtra;
5679 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5680 r_type = R_PPC_TPREL16_LO;
5681 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5682
5683 /* Was PPC_TLS which sits on insn boundary, now
5684 PPC_TPREL16_LO which is at low-order half-word. */
5685 rel->r_offset += d_offset;
5686 }
5687 break;
5688
5689 case R_PPC_GOT_TLSGD16_HI:
5690 case R_PPC_GOT_TLSGD16_HA:
5691 tls_gd = TLS_TPRELGD;
5692 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5693 goto tls_gdld_hi;
5694 break;
5695
5696 case R_PPC_GOT_TLSLD16_HI:
5697 case R_PPC_GOT_TLSLD16_HA:
5698 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5699 {
5700 tls_gdld_hi:
5701 if ((tls_mask & tls_gd) != 0)
5702 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5703 + R_PPC_GOT_TPREL16);
5704 else
5705 {
5706 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5707 rel->r_offset -= d_offset;
5708 r_type = R_PPC_NONE;
5709 }
5710 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5711 }
5712 break;
5713
5714 case R_PPC_GOT_TLSGD16:
5715 case R_PPC_GOT_TLSGD16_LO:
5716 tls_gd = TLS_TPRELGD;
5717 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5718 goto tls_get_addr_check;
5719 break;
5720
5721 case R_PPC_GOT_TLSLD16:
5722 case R_PPC_GOT_TLSLD16_LO:
5723 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5724 {
5725 tls_get_addr_check:
5726 if (rel + 1 < relend)
5727 {
5728 enum elf_ppc_reloc_type r_type2;
5729 unsigned long r_symndx2;
5730 struct elf_link_hash_entry *h2;
5731 bfd_vma insn1, insn2;
5732 bfd_vma offset;
5733
5734 /* The next instruction should be a call to
5735 __tls_get_addr. Peek at the reloc to be sure. */
5736 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5737 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5738 if (r_symndx2 < symtab_hdr->sh_info
5739 || (r_type2 != R_PPC_REL14
5740 && r_type2 != R_PPC_REL14_BRTAKEN
5741 && r_type2 != R_PPC_REL14_BRNTAKEN
5742 && r_type2 != R_PPC_REL24
5743 && r_type2 != R_PPC_PLTREL24))
5744 break;
5745
5746 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5747 while (h2->root.type == bfd_link_hash_indirect
5748 || h2->root.type == bfd_link_hash_warning)
5749 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5750 if (h2 == NULL || h2 != htab->tls_get_addr)
5751 break;
5752
5753 /* OK, it checks out. Replace the call. */
5754 offset = rel[1].r_offset;
5755 insn1 = bfd_get_32 (output_bfd,
5756 contents + rel->r_offset - d_offset);
5757 if ((tls_mask & tls_gd) != 0)
5758 {
5759 /* IE */
5760 insn1 &= (1 << 26) - 1;
5761 insn1 |= 32 << 26; /* lwz */
5762 insn2 = 0x7c631214; /* add 3,3,2 */
5763 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5764 rel[1].r_addend = 0;
5765 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5766 + R_PPC_GOT_TPREL16);
5767 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5768 }
5769 else
5770 {
5771 /* LE */
5772 insn1 = 0x3c620000; /* addis 3,2,0 */
5773 insn2 = 0x38630000; /* addi 3,3,0 */
5774 if (tls_gd == 0)
5775 {
5776 /* Was an LD reloc. */
5777 r_symndx = 0;
5778 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5779 }
5780 r_type = R_PPC_TPREL16_HA;
5781 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5782 rel[1].r_info = ELF32_R_INFO (r_symndx,
5783 R_PPC_TPREL16_LO);
5784 rel[1].r_offset += d_offset;
5785 rel[1].r_addend = rel->r_addend;
5786 }
5787 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5788 bfd_put_32 (output_bfd, insn2, contents + offset);
5789 if (tls_gd == 0)
5790 {
5791 /* We changed the symbol on an LD reloc. Start over
5792 in order to get h, sym, sec etc. right. */
5793 rel--;
5794 continue;
5795 }
5796 }
5797 }
5798 break;
5799 }
5800
5801 /* Handle other relocations that tweak non-addend part of insn. */
5802 branch_bit = 0;
5803 switch (r_type)
5804 {
5805 default:
5806 break;
5807
5808 /* Branch taken prediction relocations. */
5809 case R_PPC_ADDR14_BRTAKEN:
5810 case R_PPC_REL14_BRTAKEN:
5811 branch_bit = BRANCH_PREDICT_BIT;
5812 /* Fall thru */
5813
5814 /* Branch not taken prediction relocations. */
5815 case R_PPC_ADDR14_BRNTAKEN:
5816 case R_PPC_REL14_BRNTAKEN:
5817 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5818 insn &= ~BRANCH_PREDICT_BIT;
5819 insn |= branch_bit;
5820
5821 from = (rel->r_offset
5822 + input_section->output_offset
5823 + input_section->output_section->vma);
5824
5825 /* Invert 'y' bit if not the default. */
5826 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5827 insn ^= BRANCH_PREDICT_BIT;
5828
5829 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5830 break;
5831 }
5832
5833 addend = rel->r_addend;
5834 tls_type = 0;
5835 howto = NULL;
5836 if (r_type < R_PPC_max)
5837 howto = ppc_elf_howto_table[r_type];
5838 switch (r_type)
5839 {
5840 default:
5841 (*_bfd_error_handler)
5842 (_("%B: unknown relocation type %d for symbol %s"),
5843 input_bfd, (int) r_type, sym_name);
5844
5845 bfd_set_error (bfd_error_bad_value);
5846 ret = FALSE;
5847 continue;
5848
5849 case R_PPC_NONE:
5850 case R_PPC_TLS:
5851 case R_PPC_EMB_MRKREF:
5852 case R_PPC_GNU_VTINHERIT:
5853 case R_PPC_GNU_VTENTRY:
5854 continue;
5855
5856 /* GOT16 relocations. Like an ADDR16 using the symbol's
5857 address in the GOT as relocation value instead of the
5858 symbol's value itself. Also, create a GOT entry for the
5859 symbol and put the symbol value there. */
5860 case R_PPC_GOT_TLSGD16:
5861 case R_PPC_GOT_TLSGD16_LO:
5862 case R_PPC_GOT_TLSGD16_HI:
5863 case R_PPC_GOT_TLSGD16_HA:
5864 tls_type = TLS_TLS | TLS_GD;
5865 goto dogot;
5866
5867 case R_PPC_GOT_TLSLD16:
5868 case R_PPC_GOT_TLSLD16_LO:
5869 case R_PPC_GOT_TLSLD16_HI:
5870 case R_PPC_GOT_TLSLD16_HA:
5871 tls_type = TLS_TLS | TLS_LD;
5872 goto dogot;
5873
5874 case R_PPC_GOT_TPREL16:
5875 case R_PPC_GOT_TPREL16_LO:
5876 case R_PPC_GOT_TPREL16_HI:
5877 case R_PPC_GOT_TPREL16_HA:
5878 tls_type = TLS_TLS | TLS_TPREL;
5879 goto dogot;
5880
5881 case R_PPC_GOT_DTPREL16:
5882 case R_PPC_GOT_DTPREL16_LO:
5883 case R_PPC_GOT_DTPREL16_HI:
5884 case R_PPC_GOT_DTPREL16_HA:
5885 tls_type = TLS_TLS | TLS_DTPREL;
5886 goto dogot;
5887
5888 case R_PPC_GOT16:
5889 case R_PPC_GOT16_LO:
5890 case R_PPC_GOT16_HI:
5891 case R_PPC_GOT16_HA:
5892 dogot:
5893 {
5894 /* Relocation is to the entry for this symbol in the global
5895 offset table. */
5896 bfd_vma off;
5897 bfd_vma *offp;
5898 unsigned long indx;
5899
5900 if (htab->got == NULL)
5901 abort ();
5902
5903 indx = 0;
5904 if (tls_type == (TLS_TLS | TLS_LD)
5905 && (h == NULL
5906 || !h->def_dynamic))
5907 offp = &htab->tlsld_got.offset;
5908 else if (h != NULL)
5909 {
5910 bfd_boolean dyn;
5911 dyn = htab->elf.dynamic_sections_created;
5912 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5913 || (info->shared
5914 && SYMBOL_REFERENCES_LOCAL (info, h)))
5915 /* This is actually a static link, or it is a
5916 -Bsymbolic link and the symbol is defined
5917 locally, or the symbol was forced to be local
5918 because of a version file. */
5919 ;
5920 else
5921 {
5922 indx = h->dynindx;
5923 unresolved_reloc = FALSE;
5924 }
5925 offp = &h->got.offset;
5926 }
5927 else
5928 {
5929 if (local_got_offsets == NULL)
5930 abort ();
5931 offp = &local_got_offsets[r_symndx];
5932 }
5933
5934 /* The offset must always be a multiple of 4. We use the
5935 least significant bit to record whether we have already
5936 processed this entry. */
5937 off = *offp;
5938 if ((off & 1) != 0)
5939 off &= ~1;
5940 else
5941 {
5942 unsigned int tls_m = (tls_mask
5943 & (TLS_LD | TLS_GD | TLS_DTPREL
5944 | TLS_TPREL | TLS_TPRELGD));
5945
5946 if (offp == &htab->tlsld_got.offset)
5947 tls_m = TLS_LD;
5948 else if (h == NULL
5949 || !h->def_dynamic)
5950 tls_m &= ~TLS_LD;
5951
5952 /* We might have multiple got entries for this sym.
5953 Initialize them all. */
5954 do
5955 {
5956 int tls_ty = 0;
5957
5958 if ((tls_m & TLS_LD) != 0)
5959 {
5960 tls_ty = TLS_TLS | TLS_LD;
5961 tls_m &= ~TLS_LD;
5962 }
5963 else if ((tls_m & TLS_GD) != 0)
5964 {
5965 tls_ty = TLS_TLS | TLS_GD;
5966 tls_m &= ~TLS_GD;
5967 }
5968 else if ((tls_m & TLS_DTPREL) != 0)
5969 {
5970 tls_ty = TLS_TLS | TLS_DTPREL;
5971 tls_m &= ~TLS_DTPREL;
5972 }
5973 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5974 {
5975 tls_ty = TLS_TLS | TLS_TPREL;
5976 tls_m = 0;
5977 }
5978
5979 /* Generate relocs for the dynamic linker. */
5980 if ((info->shared || indx != 0)
5981 && (h == NULL
5982 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5983 || h->root.type != bfd_link_hash_undefweak))
5984 {
5985 outrel.r_offset = (htab->got->output_section->vma
5986 + htab->got->output_offset
5987 + off);
5988 outrel.r_addend = 0;
5989 if (tls_ty & (TLS_LD | TLS_GD))
5990 {
5991 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5992 if (tls_ty == (TLS_TLS | TLS_GD))
5993 {
5994 loc = htab->relgot->contents;
5995 loc += (htab->relgot->reloc_count++
5996 * sizeof (Elf32_External_Rela));
5997 bfd_elf32_swap_reloca_out (output_bfd,
5998 &outrel, loc);
5999 outrel.r_offset += 4;
6000 outrel.r_info
6001 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6002 }
6003 }
6004 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6005 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6006 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6007 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6008 else if (indx == 0)
6009 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6010 else
6011 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6012 if (indx == 0)
6013 {
6014 outrel.r_addend += relocation;
6015 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6016 outrel.r_addend -= htab->elf.tls_sec->vma;
6017 }
6018 loc = htab->relgot->contents;
6019 loc += (htab->relgot->reloc_count++
6020 * sizeof (Elf32_External_Rela));
6021 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6022 }
6023
6024 /* Init the .got section contents if we're not
6025 emitting a reloc. */
6026 else
6027 {
6028 bfd_vma value = relocation;
6029
6030 if (tls_ty == (TLS_TLS | TLS_LD))
6031 value = 1;
6032 else if (tls_ty != 0)
6033 {
6034 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6035 if (tls_ty == (TLS_TLS | TLS_TPREL))
6036 value += DTP_OFFSET - TP_OFFSET;
6037
6038 if (tls_ty == (TLS_TLS | TLS_GD))
6039 {
6040 bfd_put_32 (output_bfd, value,
6041 htab->got->contents + off + 4);
6042 value = 1;
6043 }
6044 }
6045 bfd_put_32 (output_bfd, value,
6046 htab->got->contents + off);
6047 }
6048
6049 off += 4;
6050 if (tls_ty & (TLS_LD | TLS_GD))
6051 off += 4;
6052 }
6053 while (tls_m != 0);
6054
6055 off = *offp;
6056 *offp = off | 1;
6057 }
6058
6059 if (off >= (bfd_vma) -2)
6060 abort ();
6061
6062 if ((tls_type & TLS_TLS) != 0)
6063 {
6064 if (tls_type != (TLS_TLS | TLS_LD))
6065 {
6066 if ((tls_mask & TLS_LD) != 0
6067 && !(h == NULL
6068 || !h->def_dynamic))
6069 off += 8;
6070 if (tls_type != (TLS_TLS | TLS_GD))
6071 {
6072 if ((tls_mask & TLS_GD) != 0)
6073 off += 8;
6074 if (tls_type != (TLS_TLS | TLS_DTPREL))
6075 {
6076 if ((tls_mask & TLS_DTPREL) != 0)
6077 off += 4;
6078 }
6079 }
6080 }
6081 }
6082
6083 relocation = htab->got->output_offset + off;
6084 relocation -= htab->elf.hgot->root.u.def.value;
6085
6086 /* Addends on got relocations don't make much sense.
6087 x+off@got is actually x@got+off, and since the got is
6088 generated by a hash table traversal, the value in the
6089 got at entry m+n bears little relation to the entry m. */
6090 if (addend != 0)
6091 (*_bfd_error_handler)
6092 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6093 input_bfd,
6094 input_section,
6095 (long) rel->r_offset,
6096 howto->name,
6097 sym_name);
6098 }
6099 break;
6100
6101 /* Relocations that need no special processing. */
6102 case R_PPC_LOCAL24PC:
6103 /* It makes no sense to point a local relocation
6104 at a symbol not in this object. */
6105 if (unresolved_reloc)
6106 {
6107 if (! (*info->callbacks->undefined_symbol) (info,
6108 h->root.root.string,
6109 input_bfd,
6110 input_section,
6111 rel->r_offset,
6112 TRUE))
6113 return FALSE;
6114 continue;
6115 }
6116 break;
6117
6118 case R_PPC_DTPREL16:
6119 case R_PPC_DTPREL16_LO:
6120 case R_PPC_DTPREL16_HI:
6121 case R_PPC_DTPREL16_HA:
6122 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6123 break;
6124
6125 /* Relocations that may need to be propagated if this is a shared
6126 object. */
6127 case R_PPC_TPREL16:
6128 case R_PPC_TPREL16_LO:
6129 case R_PPC_TPREL16_HI:
6130 case R_PPC_TPREL16_HA:
6131 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6132 /* The TPREL16 relocs shouldn't really be used in shared
6133 libs as they will result in DT_TEXTREL being set, but
6134 support them anyway. */
6135 goto dodyn;
6136
6137 case R_PPC_TPREL32:
6138 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6139 goto dodyn;
6140
6141 case R_PPC_DTPREL32:
6142 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6143 goto dodyn;
6144
6145 case R_PPC_DTPMOD32:
6146 relocation = 1;
6147 addend = 0;
6148 goto dodyn;
6149
6150 case R_PPC_REL16:
6151 case R_PPC_REL16_LO:
6152 case R_PPC_REL16_HI:
6153 case R_PPC_REL16_HA:
6154 break;
6155
6156 case R_PPC_REL24:
6157 case R_PPC_REL32:
6158 case R_PPC_REL14:
6159 case R_PPC_REL14_BRTAKEN:
6160 case R_PPC_REL14_BRNTAKEN:
6161 /* If these relocations are not to a named symbol, they can be
6162 handled right here, no need to bother the dynamic linker. */
6163 if (SYMBOL_REFERENCES_LOCAL (info, h)
6164 || h == htab->elf.hgot)
6165 break;
6166 /* fall through */
6167
6168 /* Relocations that always need to be propagated if this is a shared
6169 object. */
6170 case R_PPC_ADDR32:
6171 case R_PPC_ADDR24:
6172 case R_PPC_ADDR16:
6173 case R_PPC_ADDR16_LO:
6174 case R_PPC_ADDR16_HI:
6175 case R_PPC_ADDR16_HA:
6176 case R_PPC_ADDR14:
6177 case R_PPC_ADDR14_BRTAKEN:
6178 case R_PPC_ADDR14_BRNTAKEN:
6179 case R_PPC_UADDR32:
6180 case R_PPC_UADDR16:
6181 /* r_symndx will be zero only for relocs against symbols
6182 from removed linkonce sections, or sections discarded by
6183 a linker script. */
6184 dodyn:
6185 if (r_symndx == 0)
6186 {
6187 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6188 break;
6189 }
6190 /* Fall thru. */
6191
6192 if ((input_section->flags & SEC_ALLOC) == 0)
6193 break;
6194 /* Fall thru. */
6195
6196 if ((info->shared
6197 && (h == NULL
6198 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6199 || h->root.type != bfd_link_hash_undefweak)
6200 && (MUST_BE_DYN_RELOC (r_type)
6201 || !SYMBOL_CALLS_LOCAL (info, h)))
6202 || (ELIMINATE_COPY_RELOCS
6203 && !info->shared
6204 && h != NULL
6205 && h->dynindx != -1
6206 && !h->non_got_ref
6207 && h->def_dynamic
6208 && !h->def_regular))
6209 {
6210 int skip;
6211
6212 #ifdef DEBUG
6213 fprintf (stderr, "ppc_elf_relocate_section needs to "
6214 "create relocation for %s\n",
6215 (h && h->root.root.string
6216 ? h->root.root.string : "<unknown>"));
6217 #endif
6218
6219 /* When generating a shared object, these relocations
6220 are copied into the output file to be resolved at run
6221 time. */
6222 if (sreloc == NULL)
6223 {
6224 const char *name;
6225
6226 name = (bfd_elf_string_from_elf_section
6227 (input_bfd,
6228 elf_elfheader (input_bfd)->e_shstrndx,
6229 elf_section_data (input_section)->rel_hdr.sh_name));
6230 if (name == NULL)
6231 return FALSE;
6232
6233 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6234 && strcmp (bfd_get_section_name (input_bfd,
6235 input_section),
6236 name + 5) == 0);
6237
6238 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6239 BFD_ASSERT (sreloc != NULL);
6240 }
6241
6242 skip = 0;
6243
6244 outrel.r_offset =
6245 _bfd_elf_section_offset (output_bfd, info, input_section,
6246 rel->r_offset);
6247 if (outrel.r_offset == (bfd_vma) -1
6248 || outrel.r_offset == (bfd_vma) -2)
6249 skip = (int) outrel.r_offset;
6250 outrel.r_offset += (input_section->output_section->vma
6251 + input_section->output_offset);
6252
6253 if (skip)
6254 memset (&outrel, 0, sizeof outrel);
6255 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6256 {
6257 unresolved_reloc = FALSE;
6258 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6259 outrel.r_addend = rel->r_addend;
6260 }
6261 else
6262 {
6263 outrel.r_addend = relocation + rel->r_addend;
6264
6265 if (r_type == R_PPC_ADDR32)
6266 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6267 else
6268 {
6269 long indx;
6270
6271 if (bfd_is_abs_section (sec))
6272 indx = 0;
6273 else if (sec == NULL || sec->owner == NULL)
6274 {
6275 bfd_set_error (bfd_error_bad_value);
6276 return FALSE;
6277 }
6278 else
6279 {
6280 asection *osec;
6281
6282 /* We are turning this relocation into one
6283 against a section symbol. It would be
6284 proper to subtract the symbol's value,
6285 osec->vma, from the emitted reloc addend,
6286 but ld.so expects buggy relocs. */
6287 osec = sec->output_section;
6288 indx = elf_section_data (osec)->dynindx;
6289 if (indx == 0)
6290 {
6291 osec = htab->elf.text_index_section;
6292 indx = elf_section_data (osec)->dynindx;
6293 }
6294 BFD_ASSERT (indx != 0);
6295 #ifdef DEBUG
6296 if (indx == 0)
6297 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6298 indx, osec->name, osec->flags,
6299 h->root.root.string);
6300 #endif
6301 }
6302
6303 outrel.r_info = ELF32_R_INFO (indx, r_type);
6304 }
6305 }
6306
6307 loc = sreloc->contents;
6308 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6309 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6310
6311 if (skip == -1)
6312 continue;
6313
6314 /* This reloc will be computed at runtime. We clear the memory
6315 so that it contains predictable value. */
6316 if (! skip
6317 && ((input_section->flags & SEC_ALLOC) != 0
6318 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6319 {
6320 relocation = howto->pc_relative ? outrel.r_offset : 0;
6321 addend = 0;
6322 break;
6323 }
6324 }
6325 break;
6326
6327 case R_PPC_RELAX32PC_PLT:
6328 case R_PPC_RELAX32_PLT:
6329 {
6330 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6331
6332 if (htab->plt_type == PLT_NEW)
6333 relocation = (htab->glink->output_section->vma
6334 + htab->glink->output_offset
6335 + ent->glink_offset);
6336 else
6337 relocation = (htab->plt->output_section->vma
6338 + htab->plt->output_offset
6339 + ent->plt.offset);
6340 addend = 0;
6341 }
6342 if (r_type == R_PPC_RELAX32_PLT)
6343 goto relax32;
6344 /* Fall thru */
6345
6346 case R_PPC_RELAX32PC:
6347 relocation -= (input_section->output_section->vma
6348 + input_section->output_offset
6349 + rel->r_offset - 4);
6350 /* Fall thru */
6351
6352 case R_PPC_RELAX32:
6353 relax32:
6354 {
6355 unsigned long t0;
6356 unsigned long t1;
6357
6358 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6359 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6360
6361 /* We're clearing the bits for R_PPC_ADDR16_HA
6362 and R_PPC_ADDR16_LO here. */
6363 t0 &= ~0xffff;
6364 t1 &= ~0xffff;
6365
6366 /* t0 is HA, t1 is LO */
6367 relocation += addend;
6368 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6369 t1 |= relocation & 0xffff;
6370
6371 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6372 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6373 }
6374 continue;
6375
6376 /* Indirect .sdata relocation. */
6377 case R_PPC_EMB_SDAI16:
6378 BFD_ASSERT (htab->sdata[0].section != NULL);
6379 relocation
6380 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6381 h, relocation, rel);
6382 break;
6383
6384 /* Indirect .sdata2 relocation. */
6385 case R_PPC_EMB_SDA2I16:
6386 BFD_ASSERT (htab->sdata[1].section != NULL);
6387 relocation
6388 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6389 h, relocation, rel);
6390 break;
6391
6392 /* Handle the TOC16 reloc. We want to use the offset within the .got
6393 section, not the actual VMA. This is appropriate when generating
6394 an embedded ELF object, for which the .got section acts like the
6395 AIX .toc section. */
6396 case R_PPC_TOC16: /* phony GOT16 relocations */
6397 BFD_ASSERT (sec != NULL);
6398 BFD_ASSERT (bfd_is_und_section (sec)
6399 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6400 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6401
6402 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6403 break;
6404
6405 case R_PPC_PLTREL24:
6406 /* Relocation is to the entry for this symbol in the
6407 procedure linkage table. */
6408 {
6409 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6410
6411 addend = 0;
6412 if (ent == NULL
6413 || htab->plt == NULL)
6414 {
6415 /* We didn't make a PLT entry for this symbol. This
6416 happens when statically linking PIC code, or when
6417 using -Bsymbolic. */
6418 break;
6419 }
6420
6421 unresolved_reloc = FALSE;
6422 if (htab->plt_type == PLT_NEW)
6423 relocation = (htab->glink->output_section->vma
6424 + htab->glink->output_offset
6425 + ent->glink_offset);
6426 else
6427 relocation = (htab->plt->output_section->vma
6428 + htab->plt->output_offset
6429 + ent->plt.offset);
6430 }
6431 break;
6432
6433 /* Relocate against _SDA_BASE_. */
6434 case R_PPC_SDAREL16:
6435 {
6436 const char *name;
6437 struct elf_link_hash_entry *sh;
6438
6439 BFD_ASSERT (sec != NULL);
6440 name = bfd_get_section_name (abfd, sec->output_section);
6441 if (! ((CONST_STRNEQ (name, ".sdata")
6442 && (name[6] == 0 || name[6] == '.'))
6443 || (CONST_STRNEQ (name, ".sbss")
6444 && (name[5] == 0 || name[5] == '.'))))
6445 {
6446 (*_bfd_error_handler)
6447 (_("%B: the target (%s) of a %s relocation is "
6448 "in the wrong output section (%s)"),
6449 input_bfd,
6450 sym_name,
6451 howto->name,
6452 name);
6453 }
6454 sh = htab->sdata[0].sym;
6455 addend -= (sh->root.u.def.value
6456 + sh->root.u.def.section->output_offset
6457 + sh->root.u.def.section->output_section->vma);
6458 }
6459 break;
6460
6461 /* Relocate against _SDA2_BASE_. */
6462 case R_PPC_EMB_SDA2REL:
6463 {
6464 const char *name;
6465 struct elf_link_hash_entry *sh;
6466
6467 BFD_ASSERT (sec != NULL);
6468 name = bfd_get_section_name (abfd, sec->output_section);
6469 if (! (CONST_STRNEQ (name, ".sdata2")
6470 || CONST_STRNEQ (name, ".sbss2")))
6471 {
6472 (*_bfd_error_handler)
6473 (_("%B: the target (%s) of a %s relocation is "
6474 "in the wrong output section (%s)"),
6475 input_bfd,
6476 sym_name,
6477 howto->name,
6478 name);
6479
6480 bfd_set_error (bfd_error_bad_value);
6481 ret = FALSE;
6482 continue;
6483 }
6484 sh = htab->sdata[1].sym;
6485 addend -= (sh->root.u.def.value
6486 + sh->root.u.def.section->output_offset
6487 + sh->root.u.def.section->output_section->vma);
6488 }
6489 break;
6490
6491 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6492 case R_PPC_EMB_SDA21:
6493 case R_PPC_EMB_RELSDA:
6494 {
6495 const char *name;
6496 int reg;
6497 struct elf_link_hash_entry *sh;
6498
6499 BFD_ASSERT (sec != NULL);
6500 name = bfd_get_section_name (abfd, sec->output_section);
6501 if (((CONST_STRNEQ (name, ".sdata")
6502 && (name[6] == 0 || name[6] == '.'))
6503 || (CONST_STRNEQ (name, ".sbss")
6504 && (name[5] == 0 || name[5] == '.'))))
6505 {
6506 reg = 13;
6507 sh = htab->sdata[0].sym;
6508 addend -= (sh->root.u.def.value
6509 + sh->root.u.def.section->output_offset
6510 + sh->root.u.def.section->output_section->vma);
6511 }
6512
6513 else if (CONST_STRNEQ (name, ".sdata2")
6514 || CONST_STRNEQ (name, ".sbss2"))
6515 {
6516 reg = 2;
6517 sh = htab->sdata[1].sym;
6518 addend -= (sh->root.u.def.value
6519 + sh->root.u.def.section->output_offset
6520 + sh->root.u.def.section->output_section->vma);
6521 }
6522
6523 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6524 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6525 {
6526 reg = 0;
6527 }
6528
6529 else
6530 {
6531 (*_bfd_error_handler)
6532 (_("%B: the target (%s) of a %s relocation is "
6533 "in the wrong output section (%s)"),
6534 input_bfd,
6535 sym_name,
6536 howto->name,
6537 name);
6538
6539 bfd_set_error (bfd_error_bad_value);
6540 ret = FALSE;
6541 continue;
6542 }
6543
6544 if (r_type == R_PPC_EMB_SDA21)
6545 { /* fill in register field */
6546 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6547 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6548 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6549 }
6550 }
6551 break;
6552
6553 /* Relocate against the beginning of the section. */
6554 case R_PPC_SECTOFF:
6555 case R_PPC_SECTOFF_LO:
6556 case R_PPC_SECTOFF_HI:
6557 case R_PPC_SECTOFF_HA:
6558 BFD_ASSERT (sec != NULL);
6559 addend -= sec->output_section->vma;
6560 break;
6561
6562 /* Negative relocations. */
6563 case R_PPC_EMB_NADDR32:
6564 case R_PPC_EMB_NADDR16:
6565 case R_PPC_EMB_NADDR16_LO:
6566 case R_PPC_EMB_NADDR16_HI:
6567 case R_PPC_EMB_NADDR16_HA:
6568 addend -= 2 * relocation;
6569 break;
6570
6571 case R_PPC_COPY:
6572 case R_PPC_GLOB_DAT:
6573 case R_PPC_JMP_SLOT:
6574 case R_PPC_RELATIVE:
6575 case R_PPC_PLT32:
6576 case R_PPC_PLTREL32:
6577 case R_PPC_PLT16_LO:
6578 case R_PPC_PLT16_HI:
6579 case R_PPC_PLT16_HA:
6580 case R_PPC_ADDR30:
6581 case R_PPC_EMB_RELSEC16:
6582 case R_PPC_EMB_RELST_LO:
6583 case R_PPC_EMB_RELST_HI:
6584 case R_PPC_EMB_RELST_HA:
6585 case R_PPC_EMB_BIT_FLD:
6586 (*_bfd_error_handler)
6587 (_("%B: relocation %s is not yet supported for symbol %s."),
6588 input_bfd,
6589 howto->name,
6590 sym_name);
6591
6592 bfd_set_error (bfd_error_invalid_operation);
6593 ret = FALSE;
6594 continue;
6595 }
6596
6597 /* Do any further special processing. */
6598 switch (r_type)
6599 {
6600 default:
6601 break;
6602
6603 case R_PPC_ADDR16_HA:
6604 case R_PPC_REL16_HA:
6605 case R_PPC_SECTOFF_HA:
6606 case R_PPC_TPREL16_HA:
6607 case R_PPC_DTPREL16_HA:
6608 case R_PPC_EMB_NADDR16_HA:
6609 case R_PPC_EMB_RELST_HA:
6610 /* It's just possible that this symbol is a weak symbol
6611 that's not actually defined anywhere. In that case,
6612 'sec' would be NULL, and we should leave the symbol
6613 alone (it will be set to zero elsewhere in the link). */
6614 if (sec == NULL)
6615 break;
6616 /* Fall thru */
6617
6618 case R_PPC_PLT16_HA:
6619 case R_PPC_GOT16_HA:
6620 case R_PPC_GOT_TLSGD16_HA:
6621 case R_PPC_GOT_TLSLD16_HA:
6622 case R_PPC_GOT_TPREL16_HA:
6623 case R_PPC_GOT_DTPREL16_HA:
6624 /* Add 0x10000 if sign bit in 0:15 is set.
6625 Bits 0:15 are not used. */
6626 addend += 0x8000;
6627 break;
6628 }
6629
6630 #ifdef DEBUG
6631 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6632 "offset = %ld, addend = %ld\n",
6633 howto->name,
6634 (int) r_type,
6635 sym_name,
6636 r_symndx,
6637 (long) rel->r_offset,
6638 (long) addend);
6639 #endif
6640
6641 if (unresolved_reloc
6642 && !((input_section->flags & SEC_DEBUGGING) != 0
6643 && h->def_dynamic))
6644 {
6645 (*_bfd_error_handler)
6646 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6647 input_bfd,
6648 input_section,
6649 (long) rel->r_offset,
6650 howto->name,
6651 sym_name);
6652 ret = FALSE;
6653 }
6654
6655 r = _bfd_final_link_relocate (howto,
6656 input_bfd,
6657 input_section,
6658 contents,
6659 rel->r_offset,
6660 relocation,
6661 addend);
6662
6663 if (r != bfd_reloc_ok)
6664 {
6665 if (r == bfd_reloc_overflow)
6666 {
6667 if (warned)
6668 continue;
6669 if (h != NULL
6670 && h->root.type == bfd_link_hash_undefweak
6671 && howto->pc_relative)
6672 {
6673 /* Assume this is a call protected by other code that
6674 detect the symbol is undefined. If this is the case,
6675 we can safely ignore the overflow. If not, the
6676 program is hosed anyway, and a little warning isn't
6677 going to help. */
6678
6679 continue;
6680 }
6681
6682 if (! (*info->callbacks->reloc_overflow) (info,
6683 (h ? &h->root : NULL),
6684 sym_name,
6685 howto->name,
6686 rel->r_addend,
6687 input_bfd,
6688 input_section,
6689 rel->r_offset))
6690 return FALSE;
6691 }
6692 else
6693 {
6694 (*_bfd_error_handler)
6695 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6696 input_bfd, input_section,
6697 (long) rel->r_offset, howto->name, sym_name, (int) r);
6698 ret = FALSE;
6699 }
6700 }
6701 }
6702
6703 #ifdef DEBUG
6704 fprintf (stderr, "\n");
6705 #endif
6706
6707 return ret;
6708 }
6709 \f
6710 #define PPC_LO(v) ((v) & 0xffff)
6711 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6712 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6713
6714 /* Finish up dynamic symbol handling. We set the contents of various
6715 dynamic sections here. */
6716
6717 static bfd_boolean
6718 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6719 struct bfd_link_info *info,
6720 struct elf_link_hash_entry *h,
6721 Elf_Internal_Sym *sym)
6722 {
6723 struct ppc_elf_link_hash_table *htab;
6724 struct plt_entry *ent;
6725 bfd_boolean doneone;
6726
6727 #ifdef DEBUG
6728 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6729 h->root.root.string);
6730 #endif
6731
6732 htab = ppc_elf_hash_table (info);
6733 BFD_ASSERT (htab->elf.dynobj != NULL);
6734
6735 doneone = FALSE;
6736 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6737 if (ent->plt.offset != (bfd_vma) -1)
6738 {
6739 if (!doneone)
6740 {
6741 Elf_Internal_Rela rela;
6742 bfd_byte *loc;
6743 bfd_vma reloc_index;
6744
6745 if (htab->plt_type == PLT_NEW)
6746 reloc_index = ent->plt.offset / 4;
6747 else
6748 {
6749 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6750 / htab->plt_slot_size);
6751 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6752 && htab->plt_type == PLT_OLD)
6753 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6754 }
6755
6756 /* This symbol has an entry in the procedure linkage table.
6757 Set it up. */
6758 if (htab->plt_type == PLT_VXWORKS)
6759 {
6760 bfd_vma got_offset;
6761 const bfd_vma *plt_entry;
6762
6763 /* The first three entries in .got.plt are reserved. */
6764 got_offset = (reloc_index + 3) * 4;
6765
6766 /* Use the right PLT. */
6767 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6768 : ppc_elf_vxworks_plt_entry;
6769
6770 /* Fill in the .plt on VxWorks. */
6771 if (info->shared)
6772 {
6773 bfd_vma got_offset_hi = (got_offset >> 16)
6774 + ((got_offset & 0x8000) >> 15);
6775
6776 bfd_put_32 (output_bfd,
6777 plt_entry[0] | (got_offset_hi & 0xffff),
6778 htab->plt->contents + ent->plt.offset + 0);
6779 bfd_put_32 (output_bfd,
6780 plt_entry[1] | (got_offset & 0xffff),
6781 htab->plt->contents + ent->plt.offset + 4);
6782 }
6783 else
6784 {
6785 bfd_vma got_loc
6786 = (got_offset
6787 + htab->elf.hgot->root.u.def.value
6788 + htab->elf.hgot->root.u.def.section->output_offset
6789 + htab->elf.hgot->root.u.def.section->output_section->vma);
6790 bfd_vma got_loc_hi = (got_loc >> 16)
6791 + ((got_loc & 0x8000) >> 15);
6792
6793 bfd_put_32 (output_bfd,
6794 plt_entry[0] | (got_loc_hi & 0xffff),
6795 htab->plt->contents + ent->plt.offset + 0);
6796 bfd_put_32 (output_bfd,
6797 plt_entry[1] | (got_loc & 0xffff),
6798 htab->plt->contents + ent->plt.offset + 4);
6799 }
6800
6801 bfd_put_32 (output_bfd, plt_entry[2],
6802 htab->plt->contents + ent->plt.offset + 8);
6803 bfd_put_32 (output_bfd, plt_entry[3],
6804 htab->plt->contents + ent->plt.offset + 12);
6805
6806 /* This instruction is an immediate load. The value loaded is
6807 the byte offset of the R_PPC_JMP_SLOT relocation from the
6808 start of the .rela.plt section. The value is stored in the
6809 low-order 16 bits of the load instruction. */
6810 /* NOTE: It appears that this is now an index rather than a
6811 prescaled offset. */
6812 bfd_put_32 (output_bfd,
6813 plt_entry[4] | reloc_index,
6814 htab->plt->contents + ent->plt.offset + 16);
6815 /* This instruction is a PC-relative branch whose target is
6816 the start of the PLT section. The address of this branch
6817 instruction is 20 bytes beyond the start of this PLT entry.
6818 The address is encoded in bits 6-29, inclusive. The value
6819 stored is right-shifted by two bits, permitting a 26-bit
6820 offset. */
6821 bfd_put_32 (output_bfd,
6822 (plt_entry[5]
6823 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6824 htab->plt->contents + ent->plt.offset + 20);
6825 bfd_put_32 (output_bfd, plt_entry[6],
6826 htab->plt->contents + ent->plt.offset + 24);
6827 bfd_put_32 (output_bfd, plt_entry[7],
6828 htab->plt->contents + ent->plt.offset + 28);
6829
6830 /* Fill in the GOT entry corresponding to this PLT slot with
6831 the address immediately after the the "bctr" instruction
6832 in this PLT entry. */
6833 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6834 + htab->plt->output_offset
6835 + ent->plt.offset + 16),
6836 htab->sgotplt->contents + got_offset);
6837
6838 if (!info->shared)
6839 {
6840 /* Fill in a couple of entries in .rela.plt.unloaded. */
6841 loc = htab->srelplt2->contents
6842 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6843 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6844 * sizeof (Elf32_External_Rela));
6845
6846 /* Provide the @ha relocation for the first instruction. */
6847 rela.r_offset = (htab->plt->output_section->vma
6848 + htab->plt->output_offset
6849 + ent->plt.offset + 2);
6850 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6851 R_PPC_ADDR16_HA);
6852 rela.r_addend = got_offset;
6853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6854 loc += sizeof (Elf32_External_Rela);
6855
6856 /* Provide the @l relocation for the second instruction. */
6857 rela.r_offset = (htab->plt->output_section->vma
6858 + htab->plt->output_offset
6859 + ent->plt.offset + 6);
6860 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6861 R_PPC_ADDR16_LO);
6862 rela.r_addend = got_offset;
6863 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6864 loc += sizeof (Elf32_External_Rela);
6865
6866 /* Provide a relocation for the GOT entry corresponding to this
6867 PLT slot. Point it at the middle of the .plt entry. */
6868 rela.r_offset = (htab->sgotplt->output_section->vma
6869 + htab->sgotplt->output_offset
6870 + got_offset);
6871 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6872 R_PPC_ADDR32);
6873 rela.r_addend = ent->plt.offset + 16;
6874 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6875 }
6876
6877 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6878 In particular, the offset for the relocation is not the
6879 address of the PLT entry for this function, as specified
6880 by the ABI. Instead, the offset is set to the address of
6881 the GOT slot for this function. See EABI 4.4.4.1. */
6882 rela.r_offset = (htab->sgotplt->output_section->vma
6883 + htab->sgotplt->output_offset
6884 + got_offset);
6885
6886 }
6887 else
6888 {
6889 rela.r_offset = (htab->plt->output_section->vma
6890 + htab->plt->output_offset
6891 + ent->plt.offset);
6892 if (htab->plt_type == PLT_OLD)
6893 {
6894 /* We don't need to fill in the .plt. The ppc dynamic
6895 linker will fill it in. */
6896 }
6897 else
6898 {
6899 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6900 + htab->glink->output_section->vma
6901 + htab->glink->output_offset);
6902 bfd_put_32 (output_bfd, val,
6903 htab->plt->contents + ent->plt.offset);
6904 }
6905 }
6906
6907 /* Fill in the entry in the .rela.plt section. */
6908 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6909 rela.r_addend = 0;
6910
6911 loc = (htab->relplt->contents
6912 + reloc_index * sizeof (Elf32_External_Rela));
6913 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6914
6915 if (!h->def_regular)
6916 {
6917 /* Mark the symbol as undefined, rather than as defined in
6918 the .plt section. Leave the value alone. */
6919 sym->st_shndx = SHN_UNDEF;
6920 /* If the symbol is weak, we do need to clear the value.
6921 Otherwise, the PLT entry would provide a definition for
6922 the symbol even if the symbol wasn't defined anywhere,
6923 and so the symbol would never be NULL. */
6924 if (!h->ref_regular_nonweak)
6925 sym->st_value = 0;
6926 }
6927 doneone = TRUE;
6928 }
6929
6930 if (htab->plt_type == PLT_NEW)
6931 {
6932 bfd_vma plt;
6933 unsigned char *p;
6934
6935 plt = (ent->plt.offset
6936 + htab->plt->output_section->vma
6937 + htab->plt->output_offset);
6938 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6939
6940 if (info->shared || info->pie)
6941 {
6942 bfd_vma got = 0;
6943
6944 if (ent->addend >= 32768)
6945 got = (ent->addend
6946 + ent->sec->output_section->vma
6947 + ent->sec->output_offset);
6948 else if (htab->elf.hgot != NULL)
6949 got = (htab->elf.hgot->root.u.def.value
6950 + htab->elf.hgot->root.u.def.section->output_section->vma
6951 + htab->elf.hgot->root.u.def.section->output_offset);
6952
6953 plt -= got;
6954
6955 if (plt + 0x8000 < 0x10000)
6956 {
6957 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6958 p += 4;
6959 bfd_put_32 (output_bfd, MTCTR_11, p);
6960 p += 4;
6961 bfd_put_32 (output_bfd, BCTR, p);
6962 p += 4;
6963 bfd_put_32 (output_bfd, NOP, p);
6964 p += 4;
6965 }
6966 else
6967 {
6968 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6969 p += 4;
6970 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6971 p += 4;
6972 bfd_put_32 (output_bfd, MTCTR_11, p);
6973 p += 4;
6974 bfd_put_32 (output_bfd, BCTR, p);
6975 p += 4;
6976 }
6977 }
6978 else
6979 {
6980 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6981 p += 4;
6982 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6983 p += 4;
6984 bfd_put_32 (output_bfd, MTCTR_11, p);
6985 p += 4;
6986 bfd_put_32 (output_bfd, BCTR, p);
6987 p += 4;
6988
6989 /* We only need one non-PIC glink stub. */
6990 break;
6991 }
6992 }
6993 else
6994 break;
6995 }
6996
6997 if (h->needs_copy)
6998 {
6999 asection *s;
7000 Elf_Internal_Rela rela;
7001 bfd_byte *loc;
7002
7003 /* This symbols needs a copy reloc. Set it up. */
7004
7005 #ifdef DEBUG
7006 fprintf (stderr, ", copy");
7007 #endif
7008
7009 BFD_ASSERT (h->dynindx != -1);
7010
7011 if (ppc_elf_hash_entry (h)->has_sda_refs)
7012 s = htab->relsbss;
7013 else
7014 s = htab->relbss;
7015 BFD_ASSERT (s != NULL);
7016
7017 rela.r_offset = (h->root.u.def.value
7018 + h->root.u.def.section->output_section->vma
7019 + h->root.u.def.section->output_offset);
7020 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7021 rela.r_addend = 0;
7022 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7023 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7024 }
7025
7026 #ifdef DEBUG
7027 fprintf (stderr, "\n");
7028 #endif
7029
7030 /* Mark some specially defined symbols as absolute. */
7031 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7032 || (!htab->is_vxworks
7033 && (h == htab->elf.hgot
7034 || strcmp (h->root.root.string,
7035 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7036 sym->st_shndx = SHN_ABS;
7037
7038 return TRUE;
7039 }
7040 \f
7041 static enum elf_reloc_type_class
7042 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7043 {
7044 switch (ELF32_R_TYPE (rela->r_info))
7045 {
7046 case R_PPC_RELATIVE:
7047 return reloc_class_relative;
7048 case R_PPC_REL24:
7049 case R_PPC_ADDR24:
7050 case R_PPC_JMP_SLOT:
7051 return reloc_class_plt;
7052 case R_PPC_COPY:
7053 return reloc_class_copy;
7054 default:
7055 return reloc_class_normal;
7056 }
7057 }
7058 \f
7059 /* Finish up the dynamic sections. */
7060
7061 static bfd_boolean
7062 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7063 struct bfd_link_info *info)
7064 {
7065 asection *sdyn;
7066 asection *splt;
7067 struct ppc_elf_link_hash_table *htab;
7068 bfd_vma got;
7069 bfd * dynobj;
7070
7071 #ifdef DEBUG
7072 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7073 #endif
7074
7075 htab = ppc_elf_hash_table (info);
7076 dynobj = elf_hash_table (info)->dynobj;
7077 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7078 if (htab->is_vxworks)
7079 splt = bfd_get_section_by_name (dynobj, ".plt");
7080 else
7081 splt = NULL;
7082
7083 got = 0;
7084 if (htab->elf.hgot != NULL)
7085 got = (htab->elf.hgot->root.u.def.value
7086 + htab->elf.hgot->root.u.def.section->output_section->vma
7087 + htab->elf.hgot->root.u.def.section->output_offset);
7088
7089 if (htab->elf.dynamic_sections_created)
7090 {
7091 Elf32_External_Dyn *dyncon, *dynconend;
7092
7093 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7094
7095 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7096 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7097 for (; dyncon < dynconend; dyncon++)
7098 {
7099 Elf_Internal_Dyn dyn;
7100 asection *s;
7101
7102 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7103
7104 switch (dyn.d_tag)
7105 {
7106 case DT_PLTGOT:
7107 if (htab->is_vxworks)
7108 s = htab->sgotplt;
7109 else
7110 s = htab->plt;
7111 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7112 break;
7113
7114 case DT_PLTRELSZ:
7115 dyn.d_un.d_val = htab->relplt->size;
7116 break;
7117
7118 case DT_JMPREL:
7119 s = htab->relplt;
7120 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7121 break;
7122
7123 case DT_PPC_GOT:
7124 dyn.d_un.d_ptr = got;
7125 break;
7126
7127 case DT_RELASZ:
7128 if (htab->is_vxworks)
7129 {
7130 if (htab->relplt)
7131 dyn.d_un.d_ptr -= htab->relplt->size;
7132 break;
7133 }
7134 continue;
7135
7136 default:
7137 continue;
7138 }
7139
7140 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7141 }
7142 }
7143
7144 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7145 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7146 if (htab->got != NULL)
7147 {
7148 unsigned char *p = htab->got->contents;
7149 bfd_vma val;
7150
7151 p += htab->elf.hgot->root.u.def.value;
7152 if (htab->plt_type == PLT_OLD)
7153 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7154
7155 val = 0;
7156 if (sdyn != NULL)
7157 val = sdyn->output_section->vma + sdyn->output_offset;
7158 bfd_put_32 (output_bfd, val, p);
7159
7160 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7161 }
7162
7163 /* Fill in the first entry in the VxWorks procedure linkage table. */
7164 if (splt && splt->size > 0)
7165 {
7166 /* Use the right PLT. */
7167 static const bfd_vma *plt_entry = NULL;
7168 plt_entry = info->shared ?
7169 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7170
7171 if (!info->shared)
7172 {
7173 bfd_vma got_value =
7174 (htab->elf.hgot->root.u.def.section->output_section->vma
7175 + htab->elf.hgot->root.u.def.section->output_offset
7176 + htab->elf.hgot->root.u.def.value);
7177 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7178
7179 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7180 splt->contents + 0);
7181 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7182 splt->contents + 4);
7183 }
7184 else
7185 {
7186 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7187 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7188 }
7189 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7190 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7191 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7192 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7193 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7194 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7195
7196 if (! info->shared)
7197 {
7198 Elf_Internal_Rela rela;
7199 bfd_byte *loc;
7200
7201 loc = htab->srelplt2->contents;
7202
7203 /* Output the @ha relocation for the first instruction. */
7204 rela.r_offset = (htab->plt->output_section->vma
7205 + htab->plt->output_offset
7206 + 2);
7207 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7208 rela.r_addend = 0;
7209 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7210 loc += sizeof (Elf32_External_Rela);
7211
7212 /* Output the @l relocation for the second instruction. */
7213 rela.r_offset = (htab->plt->output_section->vma
7214 + htab->plt->output_offset
7215 + 6);
7216 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7217 rela.r_addend = 0;
7218 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7219 loc += sizeof (Elf32_External_Rela);
7220
7221 /* Fix up the remaining relocations. They may have the wrong
7222 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7223 in which symbols were output. */
7224 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7225 {
7226 Elf_Internal_Rela rel;
7227
7228 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7229 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7230 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7231 loc += sizeof (Elf32_External_Rela);
7232
7233 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7234 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7235 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7236 loc += sizeof (Elf32_External_Rela);
7237
7238 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7239 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7240 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7241 loc += sizeof (Elf32_External_Rela);
7242 }
7243 }
7244 }
7245
7246 if (htab->glink != NULL && htab->glink->contents != NULL)
7247 {
7248 unsigned char *p;
7249 unsigned char *endp;
7250 bfd_vma res0;
7251 unsigned int i;
7252
7253 /*
7254 * PIC glink code is the following:
7255 *
7256 * # ith PLT code stub.
7257 * addis 11,30,(plt+(i-1)*4-got)@ha
7258 * lwz 11,(plt+(i-1)*4-got)@l(11)
7259 * mtctr 11
7260 * bctr
7261 *
7262 * # A table of branches, one for each plt entry.
7263 * # The idea is that the plt call stub loads ctr (and r11) with these
7264 * # addresses, so (r11 - res_0) gives the plt index * 4.
7265 * res_0: b PLTresolve
7266 * res_1: b PLTresolve
7267 * .
7268 * # Some number of entries towards the end can be nops
7269 * res_n_m3: nop
7270 * res_n_m2: nop
7271 * res_n_m1:
7272 *
7273 * PLTresolve:
7274 * addis 11,11,(1f-res_0)@ha
7275 * mflr 0
7276 * bcl 20,31,1f
7277 * 1: addi 11,11,(1b-res_0)@l
7278 * mflr 12
7279 * mtlr 0
7280 * sub 11,11,12 # r11 = index * 4
7281 * addis 12,12,(got+4-1b)@ha
7282 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7283 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7284 * mtctr 0
7285 * add 0,11,11
7286 * add 11,0,11 # r11 = index * 12 = reloc offset.
7287 * bctr
7288 */
7289 static const unsigned int pic_plt_resolve[] =
7290 {
7291 ADDIS_11_11,
7292 MFLR_0,
7293 BCL_20_31,
7294 ADDI_11_11,
7295 MFLR_12,
7296 MTLR_0,
7297 SUB_11_11_12,
7298 ADDIS_12_12,
7299 LWZ_0_12,
7300 LWZ_12_12,
7301 MTCTR_0,
7302 ADD_0_11_11,
7303 ADD_11_0_11,
7304 BCTR,
7305 NOP,
7306 NOP
7307 };
7308
7309 static const unsigned int plt_resolve[] =
7310 {
7311 LIS_12,
7312 ADDIS_11_11,
7313 LWZ_0_12,
7314 ADDI_11_11,
7315 MTCTR_0,
7316 ADD_0_11_11,
7317 LWZ_12_12,
7318 ADD_11_0_11,
7319 BCTR,
7320 NOP,
7321 NOP,
7322 NOP,
7323 NOP,
7324 NOP,
7325 NOP,
7326 NOP
7327 };
7328
7329 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7330 abort ();
7331 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7332 abort ();
7333
7334 /* Build the branch table, one for each plt entry (less one),
7335 and perhaps some padding. */
7336 p = htab->glink->contents;
7337 p += htab->glink_pltresolve;
7338 endp = htab->glink->contents;
7339 endp += htab->glink->size - GLINK_PLTRESOLVE;
7340 while (p < endp - 8 * 4)
7341 {
7342 bfd_put_32 (output_bfd, B + endp - p, p);
7343 p += 4;
7344 }
7345 while (p < endp)
7346 {
7347 bfd_put_32 (output_bfd, NOP, p);
7348 p += 4;
7349 }
7350
7351 res0 = (htab->glink_pltresolve
7352 + htab->glink->output_section->vma
7353 + htab->glink->output_offset);
7354
7355 /* Last comes the PLTresolve stub. */
7356 if (info->shared || info->pie)
7357 {
7358 bfd_vma bcl;
7359
7360 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7361 {
7362 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7363 p += 4;
7364 }
7365 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7366
7367 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7368 + htab->glink->output_section->vma
7369 + htab->glink->output_offset);
7370
7371 bfd_put_32 (output_bfd,
7372 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7373 bfd_put_32 (output_bfd,
7374 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7375 bfd_put_32 (output_bfd,
7376 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7377 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7378 {
7379 bfd_put_32 (output_bfd,
7380 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7381 bfd_put_32 (output_bfd,
7382 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7383 }
7384 else
7385 {
7386 bfd_put_32 (output_bfd,
7387 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7388 bfd_put_32 (output_bfd,
7389 LWZ_12_12 + 4, p + 9*4);
7390 }
7391 }
7392 else
7393 {
7394 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7395 {
7396 bfd_put_32 (output_bfd, plt_resolve[i], p);
7397 p += 4;
7398 }
7399 p -= 4 * ARRAY_SIZE (plt_resolve);
7400
7401 bfd_put_32 (output_bfd,
7402 LIS_12 + PPC_HA (got + 4), p + 0*4);
7403 bfd_put_32 (output_bfd,
7404 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7405 bfd_put_32 (output_bfd,
7406 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7407 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7408 {
7409 bfd_put_32 (output_bfd,
7410 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7411 bfd_put_32 (output_bfd,
7412 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7413 }
7414 else
7415 {
7416 bfd_put_32 (output_bfd,
7417 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7418 bfd_put_32 (output_bfd,
7419 LWZ_12_12 + 4, p + 6*4);
7420 }
7421 }
7422 }
7423
7424 return TRUE;
7425 }
7426 \f
7427 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7428 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7429 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7430 #define TARGET_BIG_NAME "elf32-powerpc"
7431 #define ELF_ARCH bfd_arch_powerpc
7432 #define ELF_MACHINE_CODE EM_PPC
7433 #ifdef __QNXTARGET__
7434 #define ELF_MAXPAGESIZE 0x1000
7435 #else
7436 #define ELF_MAXPAGESIZE 0x10000
7437 #endif
7438 #define ELF_MINPAGESIZE 0x1000
7439 #define ELF_COMMONPAGESIZE 0x1000
7440 #define elf_info_to_howto ppc_elf_info_to_howto
7441
7442 #ifdef EM_CYGNUS_POWERPC
7443 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7444 #endif
7445
7446 #ifdef EM_PPC_OLD
7447 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7448 #endif
7449
7450 #define elf_backend_plt_not_loaded 1
7451 #define elf_backend_can_gc_sections 1
7452 #define elf_backend_can_refcount 1
7453 #define elf_backend_rela_normal 1
7454
7455 #define bfd_elf32_mkobject ppc_elf_mkobject
7456 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7457 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7458 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7459 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7460 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7461
7462 #define elf_backend_object_p ppc_elf_object_p
7463 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7464 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7465 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7466 #define elf_backend_relocate_section ppc_elf_relocate_section
7467 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7468 #define elf_backend_check_relocs ppc_elf_check_relocs
7469 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7470 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7471 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7472 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7473 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7474 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7475 #define elf_backend_fake_sections ppc_elf_fake_sections
7476 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7477 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7478 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7479 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7480 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7481 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7482 #define elf_backend_write_section ppc_elf_write_section
7483 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7484 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7485 #define elf_backend_action_discarded ppc_elf_action_discarded
7486 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7487
7488 #include "elf32-target.h"
7489
7490 /* VxWorks Target */
7491
7492 #undef TARGET_LITTLE_SYM
7493 #undef TARGET_LITTLE_NAME
7494
7495 #undef TARGET_BIG_SYM
7496 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7497 #undef TARGET_BIG_NAME
7498 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7499
7500 /* VxWorks uses the elf default section flags for .plt. */
7501 static const struct bfd_elf_special_section *
7502 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7503 {
7504 if (sec->name == NULL)
7505 return NULL;
7506
7507 if (strcmp (sec->name, ".plt") == 0)
7508 return _bfd_elf_get_sec_type_attr (abfd, sec);
7509
7510 return ppc_elf_get_sec_type_attr (abfd, sec);
7511 }
7512
7513 /* Like ppc_elf_link_hash_table_create, but overrides
7514 appropriately for VxWorks. */
7515 static struct bfd_link_hash_table *
7516 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7517 {
7518 struct bfd_link_hash_table *ret;
7519
7520 ret = ppc_elf_link_hash_table_create (abfd);
7521 if (ret)
7522 {
7523 struct ppc_elf_link_hash_table *htab
7524 = (struct ppc_elf_link_hash_table *)ret;
7525 htab->is_vxworks = 1;
7526 htab->plt_type = PLT_VXWORKS;
7527 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7528 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7529 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7530 }
7531 return ret;
7532 }
7533
7534 /* Tweak magic VxWorks symbols as they are loaded. */
7535 static bfd_boolean
7536 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7537 struct bfd_link_info *info,
7538 Elf_Internal_Sym *sym,
7539 const char **namep ATTRIBUTE_UNUSED,
7540 flagword *flagsp ATTRIBUTE_UNUSED,
7541 asection **secp,
7542 bfd_vma *valp)
7543 {
7544 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7545 valp))
7546 return FALSE;
7547
7548 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7549 }
7550
7551 static void
7552 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7553 {
7554 ppc_elf_final_write_processing(abfd, linker);
7555 elf_vxworks_final_write_processing(abfd, linker);
7556 }
7557
7558 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7559 define it. */
7560 #undef elf_backend_want_plt_sym
7561 #define elf_backend_want_plt_sym 1
7562 #undef elf_backend_want_got_plt
7563 #define elf_backend_want_got_plt 1
7564 #undef elf_backend_got_symbol_offset
7565 #define elf_backend_got_symbol_offset 0
7566 #undef elf_backend_plt_not_loaded
7567 #define elf_backend_plt_not_loaded 0
7568 #undef elf_backend_plt_readonly
7569 #define elf_backend_plt_readonly 1
7570 #undef elf_backend_got_header_size
7571 #define elf_backend_got_header_size 12
7572
7573 #undef bfd_elf32_bfd_link_hash_table_create
7574 #define bfd_elf32_bfd_link_hash_table_create \
7575 ppc_elf_vxworks_link_hash_table_create
7576 #undef elf_backend_add_symbol_hook
7577 #define elf_backend_add_symbol_hook \
7578 ppc_elf_vxworks_add_symbol_hook
7579 #undef elf_backend_link_output_symbol_hook
7580 #define elf_backend_link_output_symbol_hook \
7581 elf_vxworks_link_output_symbol_hook
7582 #undef elf_backend_final_write_processing
7583 #define elf_backend_final_write_processing \
7584 ppc_elf_vxworks_final_write_processing
7585 #undef elf_backend_get_sec_type_attr
7586 #define elf_backend_get_sec_type_attr \
7587 ppc_elf_vxworks_get_sec_type_attr
7588 #undef elf_backend_emit_relocs
7589 #define elf_backend_emit_relocs \
7590 elf_vxworks_emit_relocs
7591
7592 #undef elf32_bed
7593 #define elf32_bed ppc_elf_vxworks_bed
7594
7595 #include "elf32-target.h"
GDB Binutils - Deliverables
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