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* archive64.c (bfd_elf64_archive_write_armap): Fix buffer overrun
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64 #define TLS_GET_ADDR_GLINK_SIZE 12*4
65
66 /* VxWorks uses its own plt layout, filled in by the static linker. */
67
68 /* The standard VxWorks PLT entry. */
69 #define VXWORKS_PLT_ENTRY_SIZE 32
70 static const bfd_vma ppc_elf_vxworks_plt_entry
71 [VXWORKS_PLT_ENTRY_SIZE / 4] =
72 {
73 0x3d800000, /* lis r12,0 */
74 0x818c0000, /* lwz r12,0(r12) */
75 0x7d8903a6, /* mtctr r12 */
76 0x4e800420, /* bctr */
77 0x39600000, /* li r11,0 */
78 0x48000000, /* b 14 <.PLT0resolve+0x4> */
79 0x60000000, /* nop */
80 0x60000000, /* nop */
81 };
82 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
83 [VXWORKS_PLT_ENTRY_SIZE / 4] =
84 {
85 0x3d9e0000, /* addis r12,r30,0 */
86 0x818c0000, /* lwz r12,0(r12) */
87 0x7d8903a6, /* mtctr r12 */
88 0x4e800420, /* bctr */
89 0x39600000, /* li r11,0 */
90 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
91 0x60000000, /* nop */
92 0x60000000, /* nop */
93 };
94
95 /* The initial VxWorks PLT entry. */
96 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
97 static const bfd_vma ppc_elf_vxworks_plt0_entry
98 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
99 {
100 0x3d800000, /* lis r12,0 */
101 0x398c0000, /* addi r12,r12,0 */
102 0x800c0008, /* lwz r0,8(r12) */
103 0x7c0903a6, /* mtctr r0 */
104 0x818c0004, /* lwz r12,4(r12) */
105 0x4e800420, /* bctr */
106 0x60000000, /* nop */
107 0x60000000, /* nop */
108 };
109 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
111 {
112 0x819e0008, /* lwz r12,8(r30) */
113 0x7d8903a6, /* mtctr r12 */
114 0x819e0004, /* lwz r12,4(r30) */
115 0x4e800420, /* bctr */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 };
121
122 /* For executables, we have some additional relocations in
123 .rela.plt.unloaded, for the kernel loader. */
124
125 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
126 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
127 /* The number of relocations in the PLTResolve slot. */
128 #define VXWORKS_PLTRESOLVE_RELOCS 2
129 /* The number of relocations in the PLTResolve slot when when creating
130 a shared library. */
131 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
132
133 /* Some instructions. */
134 #define ADDIS_11_11 0x3d6b0000
135 #define ADDIS_11_30 0x3d7e0000
136 #define ADDIS_12_12 0x3d8c0000
137 #define ADDI_11_11 0x396b0000
138 #define ADD_0_11_11 0x7c0b5a14
139 #define ADD_3_12_2 0x7c6c1214
140 #define ADD_11_0_11 0x7d605a14
141 #define B 0x48000000
142 #define BCL_20_31 0x429f0005
143 #define BCTR 0x4e800420
144 #define BEQLR 0x4d820020
145 #define CMPWI_11_0 0x2c0b0000
146 #define LIS_11 0x3d600000
147 #define LIS_12 0x3d800000
148 #define LWZU_0_12 0x840c0000
149 #define LWZ_0_12 0x800c0000
150 #define LWZ_11_3 0x81630000
151 #define LWZ_11_11 0x816b0000
152 #define LWZ_11_30 0x817e0000
153 #define LWZ_12_3 0x81830000
154 #define LWZ_12_12 0x818c0000
155 #define MR_0_3 0x7c601b78
156 #define MR_3_0 0x7c030378
157 #define MFLR_0 0x7c0802a6
158 #define MFLR_12 0x7d8802a6
159 #define MTCTR_0 0x7c0903a6
160 #define MTCTR_11 0x7d6903a6
161 #define MTLR_0 0x7c0803a6
162 #define NOP 0x60000000
163 #define SUB_11_11_12 0x7d6c5850
164
165 /* Offset of tp and dtp pointers from start of TLS block. */
166 #define TP_OFFSET 0x7000
167 #define DTP_OFFSET 0x8000
168
169 /* The value of a defined global symbol. */
170 #define SYM_VAL(SYM) \
171 ((SYM)->root.u.def.section->output_section->vma \
172 + (SYM)->root.u.def.section->output_offset \
173 + (SYM)->root.u.def.value)
174 \f
175 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
176
177 static reloc_howto_type ppc_elf_howto_raw[] = {
178 /* This reloc does nothing. */
179 HOWTO (R_PPC_NONE, /* type */
180 0, /* rightshift */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
182 32, /* bitsize */
183 FALSE, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC_NONE", /* name */
188 FALSE, /* partial_inplace */
189 0, /* src_mask */
190 0, /* dst_mask */
191 FALSE), /* pcrel_offset */
192
193 /* A standard 32 bit relocation. */
194 HOWTO (R_PPC_ADDR32, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 32, /* 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_ADDR32", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0xffffffff, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* An absolute 26 bit branch; the lower two bits must be zero.
209 FIXME: we don't check that, we just clear them. */
210 HOWTO (R_PPC_ADDR24, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 26, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC_ADDR24", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0x3fffffc, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* A standard 16 bit relocation. */
225 HOWTO (R_PPC_ADDR16, /* type */
226 0, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_bitfield, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_PPC_ADDR16", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* A 16 bit relocation without overflow. */
240 HOWTO (R_PPC_ADDR16_LO, /* type */
241 0, /* rightshift */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
243 16, /* bitsize */
244 FALSE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont,/* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_PPC_ADDR16_LO", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 0xffff, /* dst_mask */
252 FALSE), /* pcrel_offset */
253
254 /* The high order 16 bits of an address. */
255 HOWTO (R_PPC_ADDR16_HI, /* 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 bfd_elf_generic_reloc, /* special_function */
263 "R_PPC_ADDR16_HI", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* The high order 16 bits of an address, plus 1 if the contents of
270 the low 16 bits, treated as a signed number, is negative. */
271 HOWTO (R_PPC_ADDR16_HA, /* type */
272 16, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 ppc_elf_addr16_ha_reloc, /* special_function */
279 "R_PPC_ADDR16_HA", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xffff, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch; the lower two bits must be zero.
286 FIXME: we don't check that, we just clear them. */
287 HOWTO (R_PPC_ADDR14, /* type */
288 0, /* rightshift */
289 2, /* size (0 = byte, 1 = short, 2 = long) */
290 16, /* bitsize */
291 FALSE, /* pc_relative */
292 0, /* bitpos */
293 complain_overflow_bitfield, /* complain_on_overflow */
294 bfd_elf_generic_reloc, /* special_function */
295 "R_PPC_ADDR14", /* name */
296 FALSE, /* partial_inplace */
297 0, /* src_mask */
298 0xfffc, /* dst_mask */
299 FALSE), /* pcrel_offset */
300
301 /* An absolute 16 bit branch, for which bit 10 should be set to
302 indicate that the branch is expected to be taken. The lower two
303 bits must be zero. */
304 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
305 0, /* rightshift */
306 2, /* size (0 = byte, 1 = short, 2 = long) */
307 16, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_bitfield, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_PPC_ADDR14_BRTAKEN",/* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0xfffc, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* An absolute 16 bit branch, for which bit 10 should be set to
319 indicate that the branch is not expected to be taken. The lower
320 two bits must be zero. */
321 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 16, /* bitsize */
325 FALSE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_bitfield, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_PPC_ADDR14_BRNTAKEN",/* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0xfffc, /* dst_mask */
333 FALSE), /* pcrel_offset */
334
335 /* A relative 26 bit branch; the lower two bits must be zero. */
336 HOWTO (R_PPC_REL24, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 26, /* bitsize */
340 TRUE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_signed, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_PPC_REL24", /* name */
345 FALSE, /* partial_inplace */
346 0, /* src_mask */
347 0x3fffffc, /* dst_mask */
348 TRUE), /* pcrel_offset */
349
350 /* A relative 16 bit branch; the lower two bits must be zero. */
351 HOWTO (R_PPC_REL14, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 16, /* bitsize */
355 TRUE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_signed, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_PPC_REL14", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xfffc, /* dst_mask */
363 TRUE), /* pcrel_offset */
364
365 /* A relative 16 bit branch. Bit 10 should be set to indicate that
366 the branch is expected to be taken. The lower two bits must be
367 zero. */
368 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
369 0, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 16, /* bitsize */
372 TRUE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_PPC_REL14_BRTAKEN", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xfffc, /* dst_mask */
380 TRUE), /* pcrel_offset */
381
382 /* A relative 16 bit branch. Bit 10 should be set to indicate that
383 the branch is not expected to be taken. The lower two bits must
384 be zero. */
385 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
386 0, /* rightshift */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 TRUE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_REL14_BRNTAKEN",/* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xfffc, /* dst_mask */
397 TRUE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
400 symbol. */
401 HOWTO (R_PPC_GOT16, /* 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_signed, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_LO, /* type */
418 0, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_dont, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_LO", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HI, /* 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 bfd_elf_generic_reloc, /* special_function */
441 "R_PPC_GOT16_HI", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
448 the symbol. */
449 HOWTO (R_PPC_GOT16_HA, /* type */
450 16, /* rightshift */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
452 16, /* bitsize */
453 FALSE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_bitfield, /* complain_on_overflow */
456 ppc_elf_addr16_ha_reloc, /* special_function */
457 "R_PPC_GOT16_HA", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0xffff, /* dst_mask */
461 FALSE), /* pcrel_offset */
462
463 /* Like R_PPC_REL24, but referring to the procedure linkage table
464 entry for the symbol. */
465 HOWTO (R_PPC_PLTREL24, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 26, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_PPC_PLTREL24", /* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x3fffffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* This is used only by the dynamic linker. The symbol should exist
480 both in the object being run and in some shared library. The
481 dynamic linker copies the data addressed by the symbol from the
482 shared library into the object, because the object being
483 run has to have the data at some particular address. */
484 HOWTO (R_PPC_COPY, /* 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_COPY", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC_ADDR32, but used when setting global offset table
499 entries. */
500 HOWTO (R_PPC_GLOB_DAT, /* type */
501 0, /* rightshift */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
503 32, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_bitfield, /* complain_on_overflow */
507 bfd_elf_generic_reloc, /* special_function */
508 "R_PPC_GLOB_DAT", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffffffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Marks a procedure linkage table entry for a symbol. */
515 HOWTO (R_PPC_JMP_SLOT, /* type */
516 0, /* rightshift */
517 2, /* size (0 = byte, 1 = short, 2 = long) */
518 32, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_bitfield, /* complain_on_overflow */
522 bfd_elf_generic_reloc, /* special_function */
523 "R_PPC_JMP_SLOT", /* name */
524 FALSE, /* partial_inplace */
525 0, /* src_mask */
526 0, /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 /* Used only by the dynamic linker. When the object is run, this
530 longword is set to the load address of the object, plus the
531 addend. */
532 HOWTO (R_PPC_RELATIVE, /* type */
533 0, /* rightshift */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
535 32, /* bitsize */
536 FALSE, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield, /* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 "R_PPC_RELATIVE", /* name */
541 FALSE, /* partial_inplace */
542 0, /* src_mask */
543 0xffffffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
545
546 /* Like R_PPC_REL24, but uses the value of the symbol within the
547 object rather than the final value. Normally used for
548 _GLOBAL_OFFSET_TABLE_. */
549 HOWTO (R_PPC_LOCAL24PC, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 26, /* bitsize */
553 TRUE, /* pc_relative */
554 0, /* bitpos */
555 complain_overflow_signed, /* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_PPC_LOCAL24PC", /* name */
558 FALSE, /* partial_inplace */
559 0, /* src_mask */
560 0x3fffffc, /* dst_mask */
561 TRUE), /* pcrel_offset */
562
563 /* Like R_PPC_ADDR32, but may be unaligned. */
564 HOWTO (R_PPC_UADDR32, /* type */
565 0, /* rightshift */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
567 32, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_bitfield, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_PPC_UADDR32", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 0xffffffff, /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* Like R_PPC_ADDR16, but may be unaligned. */
579 HOWTO (R_PPC_UADDR16, /* type */
580 0, /* rightshift */
581 1, /* size (0 = byte, 1 = short, 2 = long) */
582 16, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_bitfield, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 "R_PPC_UADDR16", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 0xffff, /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* 32-bit PC relative */
594 HOWTO (R_PPC_REL32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 TRUE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_REL32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0xffffffff, /* dst_mask */
606 TRUE), /* pcrel_offset */
607
608 /* 32-bit relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLT32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLT32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
625 FIXME: not supported. */
626 HOWTO (R_PPC_PLTREL32, /* type */
627 0, /* rightshift */
628 2, /* size (0 = byte, 1 = short, 2 = long) */
629 32, /* bitsize */
630 TRUE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_bitfield, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLTREL32", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0, /* dst_mask */
638 TRUE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_LO, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_dont, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_LO", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HI, /* 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 bfd_elf_generic_reloc, /* special_function */
666 "R_PPC_PLT16_HI", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
673 the symbol. */
674 HOWTO (R_PPC_PLT16_HA, /* type */
675 16, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_bitfield, /* complain_on_overflow */
681 ppc_elf_addr16_ha_reloc, /* special_function */
682 "R_PPC_PLT16_HA", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
689 small data items. */
690 HOWTO (R_PPC_SDAREL16, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_signed, /* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_PPC_SDAREL16", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 16-bit section relative relocation. */
705 HOWTO (R_PPC_SECTOFF, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_bitfield, /* complain_on_overflow */
712 bfd_elf_generic_reloc, /* special_function */
713 "R_PPC_SECTOFF", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit lower half section relative relocation. */
720 HOWTO (R_PPC_SECTOFF_LO, /* type */
721 0, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC_SECTOFF_LO", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half section relative relocation. */
735 HOWTO (R_PPC_SECTOFF_HI, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_bitfield, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC_SECTOFF_HI", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* 16-bit upper half adjusted section relative relocation. */
750 HOWTO (R_PPC_SECTOFF_HA, /* type */
751 16, /* rightshift */
752 1, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_bitfield, /* complain_on_overflow */
757 ppc_elf_addr16_ha_reloc, /* special_function */
758 "R_PPC_SECTOFF_HA", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Marker relocs for TLS. */
765 HOWTO (R_PPC_TLS,
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 bfd_elf_generic_reloc, /* special_function */
773 "R_PPC_TLS", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 HOWTO (R_PPC_TLSGD,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLSGD", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSLD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSLD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 /* Computes the load module index of the load module that contains the
808 definition of its TLS sym. */
809 HOWTO (R_PPC_DTPMOD32,
810 0, /* rightshift */
811 2, /* size (0 = byte, 1 = short, 2 = long) */
812 32, /* bitsize */
813 FALSE, /* pc_relative */
814 0, /* bitpos */
815 complain_overflow_dont, /* complain_on_overflow */
816 ppc_elf_unhandled_reloc, /* special_function */
817 "R_PPC_DTPMOD32", /* name */
818 FALSE, /* partial_inplace */
819 0, /* src_mask */
820 0xffffffff, /* dst_mask */
821 FALSE), /* pcrel_offset */
822
823 /* Computes a dtv-relative displacement, the difference between the value
824 of sym+add and the base address of the thread-local storage block that
825 contains the definition of sym, minus 0x8000. */
826 HOWTO (R_PPC_DTPREL32,
827 0, /* rightshift */
828 2, /* size (0 = byte, 1 = short, 2 = long) */
829 32, /* bitsize */
830 FALSE, /* pc_relative */
831 0, /* bitpos */
832 complain_overflow_dont, /* complain_on_overflow */
833 ppc_elf_unhandled_reloc, /* special_function */
834 "R_PPC_DTPREL32", /* name */
835 FALSE, /* partial_inplace */
836 0, /* src_mask */
837 0xffffffff, /* dst_mask */
838 FALSE), /* pcrel_offset */
839
840 /* A 16 bit dtprel reloc. */
841 HOWTO (R_PPC_DTPREL16,
842 0, /* rightshift */
843 1, /* size (0 = byte, 1 = short, 2 = long) */
844 16, /* bitsize */
845 FALSE, /* pc_relative */
846 0, /* bitpos */
847 complain_overflow_signed, /* complain_on_overflow */
848 ppc_elf_unhandled_reloc, /* special_function */
849 "R_PPC_DTPREL16", /* name */
850 FALSE, /* partial_inplace */
851 0, /* src_mask */
852 0xffff, /* dst_mask */
853 FALSE), /* pcrel_offset */
854
855 /* Like DTPREL16, but no overflow. */
856 HOWTO (R_PPC_DTPREL16_LO,
857 0, /* rightshift */
858 1, /* size (0 = byte, 1 = short, 2 = long) */
859 16, /* bitsize */
860 FALSE, /* pc_relative */
861 0, /* bitpos */
862 complain_overflow_dont, /* complain_on_overflow */
863 ppc_elf_unhandled_reloc, /* special_function */
864 "R_PPC_DTPREL16_LO", /* name */
865 FALSE, /* partial_inplace */
866 0, /* src_mask */
867 0xffff, /* dst_mask */
868 FALSE), /* pcrel_offset */
869
870 /* Like DTPREL16_LO, but next higher group of 16 bits. */
871 HOWTO (R_PPC_DTPREL16_HI,
872 16, /* rightshift */
873 1, /* size (0 = byte, 1 = short, 2 = long) */
874 16, /* bitsize */
875 FALSE, /* pc_relative */
876 0, /* bitpos */
877 complain_overflow_dont, /* complain_on_overflow */
878 ppc_elf_unhandled_reloc, /* special_function */
879 "R_PPC_DTPREL16_HI", /* name */
880 FALSE, /* partial_inplace */
881 0, /* src_mask */
882 0xffff, /* dst_mask */
883 FALSE), /* pcrel_offset */
884
885 /* Like DTPREL16_HI, but adjust for low 16 bits. */
886 HOWTO (R_PPC_DTPREL16_HA,
887 16, /* rightshift */
888 1, /* size (0 = byte, 1 = short, 2 = long) */
889 16, /* bitsize */
890 FALSE, /* pc_relative */
891 0, /* bitpos */
892 complain_overflow_dont, /* complain_on_overflow */
893 ppc_elf_unhandled_reloc, /* special_function */
894 "R_PPC_DTPREL16_HA", /* name */
895 FALSE, /* partial_inplace */
896 0, /* src_mask */
897 0xffff, /* dst_mask */
898 FALSE), /* pcrel_offset */
899
900 /* Computes a tp-relative displacement, the difference between the value of
901 sym+add and the value of the thread pointer (r13). */
902 HOWTO (R_PPC_TPREL32,
903 0, /* rightshift */
904 2, /* size (0 = byte, 1 = short, 2 = long) */
905 32, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 ppc_elf_unhandled_reloc, /* special_function */
910 "R_PPC_TPREL32", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffffffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* A 16 bit tprel reloc. */
917 HOWTO (R_PPC_TPREL16,
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_signed, /* complain_on_overflow */
924 ppc_elf_unhandled_reloc, /* special_function */
925 "R_PPC_TPREL16", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* Like TPREL16, but no overflow. */
932 HOWTO (R_PPC_TPREL16_LO,
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc_elf_unhandled_reloc, /* special_function */
940 "R_PPC_TPREL16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* Like TPREL16_LO, but next higher group of 16 bits. */
947 HOWTO (R_PPC_TPREL16_HI,
948 16, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 FALSE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc_elf_unhandled_reloc, /* special_function */
955 "R_PPC_TPREL16_HI", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
960
961 /* Like TPREL16_HI, but adjust for low 16 bits. */
962 HOWTO (R_PPC_TPREL16_HA,
963 16, /* rightshift */
964 1, /* size (0 = byte, 1 = short, 2 = long) */
965 16, /* bitsize */
966 FALSE, /* pc_relative */
967 0, /* bitpos */
968 complain_overflow_dont, /* complain_on_overflow */
969 ppc_elf_unhandled_reloc, /* special_function */
970 "R_PPC_TPREL16_HA", /* name */
971 FALSE, /* partial_inplace */
972 0, /* src_mask */
973 0xffff, /* dst_mask */
974 FALSE), /* pcrel_offset */
975
976 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
977 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
978 to the first entry. */
979 HOWTO (R_PPC_GOT_TLSGD16,
980 0, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_signed, /* complain_on_overflow */
986 ppc_elf_unhandled_reloc, /* special_function */
987 "R_PPC_GOT_TLSGD16", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* Like GOT_TLSGD16, but no overflow. */
994 HOWTO (R_PPC_GOT_TLSGD16_LO,
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 ppc_elf_unhandled_reloc, /* special_function */
1002 "R_PPC_GOT_TLSGD16_LO", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1009 HOWTO (R_PPC_GOT_TLSGD16_HI,
1010 16, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 ppc_elf_unhandled_reloc, /* special_function */
1017 "R_PPC_GOT_TLSGD16_HI", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1024 HOWTO (R_PPC_GOT_TLSGD16_HA,
1025 16, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc_elf_unhandled_reloc, /* special_function */
1032 "R_PPC_GOT_TLSGD16_HA", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1039 with values (sym+add)@dtpmod and zero, and computes the offset to the
1040 first entry. */
1041 HOWTO (R_PPC_GOT_TLSLD16,
1042 0, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_signed, /* complain_on_overflow */
1048 ppc_elf_unhandled_reloc, /* special_function */
1049 "R_PPC_GOT_TLSLD16", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like GOT_TLSLD16, but no overflow. */
1056 HOWTO (R_PPC_GOT_TLSLD16_LO,
1057 0, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont, /* complain_on_overflow */
1063 ppc_elf_unhandled_reloc, /* special_function */
1064 "R_PPC_GOT_TLSLD16_LO", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1071 HOWTO (R_PPC_GOT_TLSLD16_HI,
1072 16, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_dont, /* complain_on_overflow */
1078 ppc_elf_unhandled_reloc, /* special_function */
1079 "R_PPC_GOT_TLSLD16_HI", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xffff, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1086 HOWTO (R_PPC_GOT_TLSLD16_HA,
1087 16, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont, /* complain_on_overflow */
1093 ppc_elf_unhandled_reloc, /* special_function */
1094 "R_PPC_GOT_TLSLD16_HA", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xffff, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1101 the offset to the entry. */
1102 HOWTO (R_PPC_GOT_DTPREL16,
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_signed, /* complain_on_overflow */
1109 ppc_elf_unhandled_reloc, /* special_function */
1110 "R_PPC_GOT_DTPREL16", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xffff, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like GOT_DTPREL16, but no overflow. */
1117 HOWTO (R_PPC_GOT_DTPREL16_LO,
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_dont, /* complain_on_overflow */
1124 ppc_elf_unhandled_reloc, /* special_function */
1125 "R_PPC_GOT_DTPREL16_LO", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xffff, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1132 HOWTO (R_PPC_GOT_DTPREL16_HI,
1133 16, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc_elf_unhandled_reloc, /* special_function */
1140 "R_PPC_GOT_DTPREL16_HI", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xffff, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1147 HOWTO (R_PPC_GOT_DTPREL16_HA,
1148 16, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_dont, /* complain_on_overflow */
1154 ppc_elf_unhandled_reloc, /* special_function */
1155 "R_PPC_GOT_DTPREL16_HA", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xffff, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1162 offset to the entry. */
1163 HOWTO (R_PPC_GOT_TPREL16,
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_signed, /* complain_on_overflow */
1170 ppc_elf_unhandled_reloc, /* special_function */
1171 "R_PPC_GOT_TPREL16", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xffff, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like GOT_TPREL16, but no overflow. */
1178 HOWTO (R_PPC_GOT_TPREL16_LO,
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_dont, /* complain_on_overflow */
1185 ppc_elf_unhandled_reloc, /* special_function */
1186 "R_PPC_GOT_TPREL16_LO", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xffff, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1193 HOWTO (R_PPC_GOT_TPREL16_HI,
1194 16, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc_elf_unhandled_reloc, /* special_function */
1201 "R_PPC_GOT_TPREL16_HI", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xffff, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1208 HOWTO (R_PPC_GOT_TPREL16_HA,
1209 16, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont, /* complain_on_overflow */
1215 ppc_elf_unhandled_reloc, /* special_function */
1216 "R_PPC_GOT_TPREL16_HA", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xffff, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* The remaining relocs are from the Embedded ELF ABI, and are not
1223 in the SVR4 ELF ABI. */
1224
1225 /* 32 bit value resulting from the addend minus the symbol. */
1226 HOWTO (R_PPC_EMB_NADDR32, /* type */
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_bitfield, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC_EMB_NADDR32", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0xffffffff, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* 16 bit value resulting from the addend minus the symbol. */
1241 HOWTO (R_PPC_EMB_NADDR16, /* type */
1242 0, /* rightshift */
1243 1, /* size (0 = byte, 1 = short, 2 = long) */
1244 16, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_bitfield, /* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_PPC_EMB_NADDR16", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 0xffff, /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* 16 bit value resulting from the addend minus the symbol. */
1256 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1257 0, /* rightshift */
1258 1, /* size (0 = byte, 1 = short, 2 = long) */
1259 16, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_dont,/* complain_on_overflow */
1263 bfd_elf_generic_reloc, /* special_function */
1264 "R_PPC_EMB_ADDR16_LO", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0xffff, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 /* The high order 16 bits of the addend minus the symbol. */
1271 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1272 16, /* rightshift */
1273 1, /* size (0 = byte, 1 = short, 2 = long) */
1274 16, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC_EMB_NADDR16_HI", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0xffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* The high order 16 bits of the result of the addend minus the address,
1286 plus 1 if the contents of the low 16 bits, treated as a signed number,
1287 is negative. */
1288 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1289 16, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc_elf_addr16_ha_reloc, /* special_function */
1296 "R_PPC_EMB_NADDR16_HA", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* 16 bit value resulting from allocating a 4 byte word to hold an
1303 address in the .sdata section, and returning the offset from
1304 _SDA_BASE_ for that relocation. */
1305 HOWTO (R_PPC_EMB_SDAI16, /* type */
1306 0, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_signed, /* complain_on_overflow */
1312 bfd_elf_generic_reloc, /* special_function */
1313 "R_PPC_EMB_SDAI16", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* 16 bit value resulting from allocating a 4 byte word to hold an
1320 address in the .sdata2 section, and returning the offset from
1321 _SDA2_BASE_ for that relocation. */
1322 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1323 0, /* rightshift */
1324 1, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_signed, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC_EMB_SDA2I16", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0xffff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1337 small data items. */
1338 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1339 0, /* rightshift */
1340 1, /* size (0 = byte, 1 = short, 2 = long) */
1341 16, /* bitsize */
1342 FALSE, /* pc_relative */
1343 0, /* bitpos */
1344 complain_overflow_signed, /* complain_on_overflow */
1345 bfd_elf_generic_reloc, /* special_function */
1346 "R_PPC_EMB_SDA2REL", /* name */
1347 FALSE, /* partial_inplace */
1348 0, /* src_mask */
1349 0xffff, /* dst_mask */
1350 FALSE), /* pcrel_offset */
1351
1352 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1353 signed offset from the appropriate base, and filling in the register
1354 field with the appropriate register (0, 2, or 13). */
1355 HOWTO (R_PPC_EMB_SDA21, /* type */
1356 0, /* rightshift */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1358 16, /* bitsize */
1359 FALSE, /* pc_relative */
1360 0, /* bitpos */
1361 complain_overflow_signed, /* complain_on_overflow */
1362 bfd_elf_generic_reloc, /* special_function */
1363 "R_PPC_EMB_SDA21", /* name */
1364 FALSE, /* partial_inplace */
1365 0, /* src_mask */
1366 0xffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1368
1369 /* Relocation not handled: R_PPC_EMB_MRKREF */
1370 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1371 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1372 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1373 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1374 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1375
1376 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1377 in the 16 bit signed offset from the appropriate base, and filling in the
1378 register field with the appropriate register (0, 2, or 13). */
1379 HOWTO (R_PPC_EMB_RELSDA, /* type */
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 bfd_elf_generic_reloc, /* special_function */
1387 "R_PPC_EMB_RELSDA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 HOWTO (R_PPC_IRELATIVE, /* type */
1394 0, /* rightshift */
1395 2, /* size (0 = byte, 1 = short, 2 = long) */
1396 32, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_bitfield, /* complain_on_overflow */
1400 bfd_elf_generic_reloc, /* special_function */
1401 "R_PPC_IRELATIVE", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffffffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* A 16 bit relative relocation. */
1408 HOWTO (R_PPC_REL16, /* type */
1409 0, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 TRUE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_bitfield, /* complain_on_overflow */
1415 bfd_elf_generic_reloc, /* special_function */
1416 "R_PPC_REL16", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xffff, /* dst_mask */
1420 TRUE), /* pcrel_offset */
1421
1422 /* A 16 bit relative relocation without overflow. */
1423 HOWTO (R_PPC_REL16_LO, /* type */
1424 0, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 TRUE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_dont,/* complain_on_overflow */
1430 bfd_elf_generic_reloc, /* special_function */
1431 "R_PPC_REL16_LO", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 TRUE), /* pcrel_offset */
1436
1437 /* The high order 16 bits of a relative address. */
1438 HOWTO (R_PPC_REL16_HI, /* type */
1439 16, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 TRUE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 bfd_elf_generic_reloc, /* special_function */
1446 "R_PPC_REL16_HI", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xffff, /* dst_mask */
1450 TRUE), /* pcrel_offset */
1451
1452 /* The high order 16 bits of a relative address, plus 1 if the contents of
1453 the low 16 bits, treated as a signed number, is negative. */
1454 HOWTO (R_PPC_REL16_HA, /* type */
1455 16, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 TRUE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc_elf_addr16_ha_reloc, /* special_function */
1462 "R_PPC_REL16_HA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 TRUE), /* pcrel_offset */
1467
1468 /* GNU extension to record C++ vtable hierarchy. */
1469 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1470 0, /* rightshift */
1471 0, /* size (0 = byte, 1 = short, 2 = long) */
1472 0, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 NULL, /* special_function */
1477 "R_PPC_GNU_VTINHERIT", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* GNU extension to record C++ vtable member usage. */
1484 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1485 0, /* rightshift */
1486 0, /* size (0 = byte, 1 = short, 2 = long) */
1487 0, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 NULL, /* special_function */
1492 "R_PPC_GNU_VTENTRY", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Phony reloc to handle AIX style TOC entries. */
1499 HOWTO (R_PPC_TOC16, /* type */
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 bfd_elf_generic_reloc, /* special_function */
1507 "R_PPC_TOC16", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512 };
1513 \f
1514 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1515
1516 static void
1517 ppc_elf_howto_init (void)
1518 {
1519 unsigned int i, type;
1520
1521 for (i = 0;
1522 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1523 i++)
1524 {
1525 type = ppc_elf_howto_raw[i].type;
1526 if (type >= (sizeof (ppc_elf_howto_table)
1527 / sizeof (ppc_elf_howto_table[0])))
1528 abort ();
1529 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1530 }
1531 }
1532
1533 static reloc_howto_type *
1534 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1535 bfd_reloc_code_real_type code)
1536 {
1537 enum elf_ppc_reloc_type r;
1538
1539 /* Initialize howto table if not already done. */
1540 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1541 ppc_elf_howto_init ();
1542
1543 switch (code)
1544 {
1545 default:
1546 return NULL;
1547
1548 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1549 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1550 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1551 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1552 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1553 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1554 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1555 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1556 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1557 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1558 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1559 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1560 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1561 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1562 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1563 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1564 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1565 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1566 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1567 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1568 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1569 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1570 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1571 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1572 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1573 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1574 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1575 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1576 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1577 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1578 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1579 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1580 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1581 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1582 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1583 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1584 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1585 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1586 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1587 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1588 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1589 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1590 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1591 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1592 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1593 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1594 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1595 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1596 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1597 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1598 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1599 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1600 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1601 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1602 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1603 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1604 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1605 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1606 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1607 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1608 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1609 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1610 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1611 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1612 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1613 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1614 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1615 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1616 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1617 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1618 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1619 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1620 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1621 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1622 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1623 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1624 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1625 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1626 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1627 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1628 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1629 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1630 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1631 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1632 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1633 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1634 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1635 }
1636
1637 return ppc_elf_howto_table[r];
1638 };
1639
1640 static reloc_howto_type *
1641 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1642 const char *r_name)
1643 {
1644 unsigned int i;
1645
1646 for (i = 0;
1647 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1648 i++)
1649 if (ppc_elf_howto_raw[i].name != NULL
1650 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1651 return &ppc_elf_howto_raw[i];
1652
1653 return NULL;
1654 }
1655
1656 /* Set the howto pointer for a PowerPC ELF reloc. */
1657
1658 static void
1659 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1660 arelent *cache_ptr,
1661 Elf_Internal_Rela *dst)
1662 {
1663 /* Initialize howto table if not already done. */
1664 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1665 ppc_elf_howto_init ();
1666
1667 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1668 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1669
1670 /* Just because the above assert didn't trigger doesn't mean that
1671 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1672 if (!cache_ptr->howto)
1673 {
1674 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1675 abfd, ELF32_R_TYPE (dst->r_info));
1676 bfd_set_error (bfd_error_bad_value);
1677
1678 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1679 }
1680 }
1681
1682 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1683
1684 static bfd_reloc_status_type
1685 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1686 arelent *reloc_entry,
1687 asymbol *symbol,
1688 void *data ATTRIBUTE_UNUSED,
1689 asection *input_section,
1690 bfd *output_bfd,
1691 char **error_message ATTRIBUTE_UNUSED)
1692 {
1693 bfd_vma relocation;
1694
1695 if (output_bfd != NULL)
1696 {
1697 reloc_entry->address += input_section->output_offset;
1698 return bfd_reloc_ok;
1699 }
1700
1701 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1702 return bfd_reloc_outofrange;
1703
1704 if (bfd_is_com_section (symbol->section))
1705 relocation = 0;
1706 else
1707 relocation = symbol->value;
1708
1709 relocation += symbol->section->output_section->vma;
1710 relocation += symbol->section->output_offset;
1711 relocation += reloc_entry->addend;
1712 if (reloc_entry->howto->pc_relative)
1713 relocation -= reloc_entry->address;
1714
1715 reloc_entry->addend += (relocation & 0x8000) << 1;
1716
1717 return bfd_reloc_continue;
1718 }
1719
1720 static bfd_reloc_status_type
1721 ppc_elf_unhandled_reloc (bfd *abfd,
1722 arelent *reloc_entry,
1723 asymbol *symbol,
1724 void *data,
1725 asection *input_section,
1726 bfd *output_bfd,
1727 char **error_message)
1728 {
1729 /* If this is a relocatable link (output_bfd test tells us), just
1730 call the generic function. Any adjustment will be done at final
1731 link time. */
1732 if (output_bfd != NULL)
1733 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1734 input_section, output_bfd, error_message);
1735
1736 if (error_message != NULL)
1737 {
1738 static char buf[60];
1739 sprintf (buf, _("generic linker can't handle %s"),
1740 reloc_entry->howto->name);
1741 *error_message = buf;
1742 }
1743 return bfd_reloc_dangerous;
1744 }
1745 \f
1746 /* Sections created by the linker. */
1747
1748 typedef struct elf_linker_section
1749 {
1750 /* Pointer to the bfd section. */
1751 asection *section;
1752 /* Section name. */
1753 const char *name;
1754 /* Associated bss section name. */
1755 const char *bss_name;
1756 /* Associated symbol name. */
1757 const char *sym_name;
1758 /* Associated symbol. */
1759 struct elf_link_hash_entry *sym;
1760 } elf_linker_section_t;
1761
1762 /* Linked list of allocated pointer entries. This hangs off of the
1763 symbol lists, and provides allows us to return different pointers,
1764 based on different addend's. */
1765
1766 typedef struct elf_linker_section_pointers
1767 {
1768 /* next allocated pointer for this symbol */
1769 struct elf_linker_section_pointers *next;
1770 /* offset of pointer from beginning of section */
1771 bfd_vma offset;
1772 /* addend used */
1773 bfd_vma addend;
1774 /* which linker section this is */
1775 elf_linker_section_t *lsect;
1776 } elf_linker_section_pointers_t;
1777
1778 struct ppc_elf_obj_tdata
1779 {
1780 struct elf_obj_tdata elf;
1781
1782 /* A mapping from local symbols to offsets into the various linker
1783 sections added. This is index by the symbol index. */
1784 elf_linker_section_pointers_t **linker_section_pointers;
1785
1786 /* Flags used to auto-detect plt type. */
1787 unsigned int makes_plt_call : 1;
1788 unsigned int has_rel16 : 1;
1789 };
1790
1791 #define ppc_elf_tdata(bfd) \
1792 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1793
1794 #define elf_local_ptr_offsets(bfd) \
1795 (ppc_elf_tdata (bfd)->linker_section_pointers)
1796
1797 #define is_ppc_elf(bfd) \
1798 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1799 && elf_object_id (bfd) == PPC32_ELF_DATA)
1800
1801 /* Override the generic function because we store some extras. */
1802
1803 static bfd_boolean
1804 ppc_elf_mkobject (bfd *abfd)
1805 {
1806 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1807 PPC32_ELF_DATA);
1808 }
1809
1810 /* Fix bad default arch selected for a 32 bit input bfd when the
1811 default is 64 bit. */
1812
1813 static bfd_boolean
1814 ppc_elf_object_p (bfd *abfd)
1815 {
1816 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1817 {
1818 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1819
1820 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1821 {
1822 /* Relies on arch after 64 bit default being 32 bit default. */
1823 abfd->arch_info = abfd->arch_info->next;
1824 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1825 }
1826 }
1827 return TRUE;
1828 }
1829
1830 /* Function to set whether a module needs the -mrelocatable bit set. */
1831
1832 static bfd_boolean
1833 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1834 {
1835 BFD_ASSERT (!elf_flags_init (abfd)
1836 || elf_elfheader (abfd)->e_flags == flags);
1837
1838 elf_elfheader (abfd)->e_flags = flags;
1839 elf_flags_init (abfd) = TRUE;
1840 return TRUE;
1841 }
1842
1843 /* Support for core dump NOTE sections. */
1844
1845 static bfd_boolean
1846 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1847 {
1848 int offset;
1849 unsigned int size;
1850
1851 switch (note->descsz)
1852 {
1853 default:
1854 return FALSE;
1855
1856 case 268: /* Linux/PPC. */
1857 /* pr_cursig */
1858 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1859
1860 /* pr_pid */
1861 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1862
1863 /* pr_reg */
1864 offset = 72;
1865 size = 192;
1866
1867 break;
1868 }
1869
1870 /* Make a ".reg/999" section. */
1871 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1872 size, note->descpos + offset);
1873 }
1874
1875 static bfd_boolean
1876 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1877 {
1878 switch (note->descsz)
1879 {
1880 default:
1881 return FALSE;
1882
1883 case 128: /* Linux/PPC elf_prpsinfo. */
1884 elf_tdata (abfd)->core_program
1885 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1886 elf_tdata (abfd)->core_command
1887 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1888 }
1889
1890 /* Note that for some reason, a spurious space is tacked
1891 onto the end of the args in some (at least one anyway)
1892 implementations, so strip it off if it exists. */
1893
1894 {
1895 char *command = elf_tdata (abfd)->core_command;
1896 int n = strlen (command);
1897
1898 if (0 < n && command[n - 1] == ' ')
1899 command[n - 1] = '\0';
1900 }
1901
1902 return TRUE;
1903 }
1904
1905 static char *
1906 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1907 {
1908 switch (note_type)
1909 {
1910 default:
1911 return NULL;
1912
1913 case NT_PRPSINFO:
1914 {
1915 char data[128];
1916 va_list ap;
1917
1918 va_start (ap, note_type);
1919 memset (data, 0, 32);
1920 strncpy (data + 32, va_arg (ap, const char *), 16);
1921 strncpy (data + 48, va_arg (ap, const char *), 80);
1922 va_end (ap);
1923 return elfcore_write_note (abfd, buf, bufsiz,
1924 "CORE", note_type, data, sizeof (data));
1925 }
1926
1927 case NT_PRSTATUS:
1928 {
1929 char data[268];
1930 va_list ap;
1931 long pid;
1932 int cursig;
1933 const void *greg;
1934
1935 va_start (ap, note_type);
1936 memset (data, 0, 72);
1937 pid = va_arg (ap, long);
1938 bfd_put_32 (abfd, pid, data + 24);
1939 cursig = va_arg (ap, int);
1940 bfd_put_16 (abfd, cursig, data + 12);
1941 greg = va_arg (ap, const void *);
1942 memcpy (data + 72, greg, 192);
1943 memset (data + 264, 0, 4);
1944 va_end (ap);
1945 return elfcore_write_note (abfd, buf, bufsiz,
1946 "CORE", note_type, data, sizeof (data));
1947 }
1948 }
1949 }
1950
1951 /* Return address for Ith PLT stub in section PLT, for relocation REL
1952 or (bfd_vma) -1 if it should not be included. */
1953
1954 static bfd_vma
1955 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1956 const asection *plt ATTRIBUTE_UNUSED,
1957 const arelent *rel)
1958 {
1959 return rel->address;
1960 }
1961
1962 /* Handle a PowerPC specific section when reading an object file. This
1963 is called when bfd_section_from_shdr finds a section with an unknown
1964 type. */
1965
1966 static bfd_boolean
1967 ppc_elf_section_from_shdr (bfd *abfd,
1968 Elf_Internal_Shdr *hdr,
1969 const char *name,
1970 int shindex)
1971 {
1972 asection *newsect;
1973 flagword flags;
1974
1975 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1976 return FALSE;
1977
1978 newsect = hdr->bfd_section;
1979 flags = bfd_get_section_flags (abfd, newsect);
1980 if (hdr->sh_flags & SHF_EXCLUDE)
1981 flags |= SEC_EXCLUDE;
1982
1983 if (hdr->sh_type == SHT_ORDERED)
1984 flags |= SEC_SORT_ENTRIES;
1985
1986 bfd_set_section_flags (abfd, newsect, flags);
1987 return TRUE;
1988 }
1989
1990 /* Set up any other section flags and such that may be necessary. */
1991
1992 static bfd_boolean
1993 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1994 Elf_Internal_Shdr *shdr,
1995 asection *asect)
1996 {
1997 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1998 shdr->sh_type = SHT_ORDERED;
1999
2000 return TRUE;
2001 }
2002
2003 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2004 need to bump up the number of section headers. */
2005
2006 static int
2007 ppc_elf_additional_program_headers (bfd *abfd,
2008 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2009 {
2010 asection *s;
2011 int ret = 0;
2012
2013 s = bfd_get_section_by_name (abfd, ".sbss2");
2014 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2015 ++ret;
2016
2017 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2018 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2019 ++ret;
2020
2021 return ret;
2022 }
2023
2024 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2025 .PPC.EMB.sbss0 a normal section, and not a bss section so
2026 that the linker doesn't crater when trying to make more than
2027 2 sections. */
2028
2029 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2030 {
2031 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2032 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2033 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2034 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2035 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2036 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2037 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2038 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2039 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2040 { NULL, 0, 0, 0, 0 }
2041 };
2042
2043 /* This is what we want for new plt/got. */
2044 static struct bfd_elf_special_section ppc_alt_plt =
2045 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2046
2047 static const struct bfd_elf_special_section *
2048 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2049 {
2050 const struct bfd_elf_special_section *ssect;
2051
2052 /* See if this is one of the special sections. */
2053 if (sec->name == NULL)
2054 return NULL;
2055
2056 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2057 sec->use_rela_p);
2058 if (ssect != NULL)
2059 {
2060 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2061 ssect = &ppc_alt_plt;
2062 return ssect;
2063 }
2064
2065 return _bfd_elf_get_sec_type_attr (abfd, sec);
2066 }
2067 \f
2068 /* Very simple linked list structure for recording apuinfo values. */
2069 typedef struct apuinfo_list
2070 {
2071 struct apuinfo_list *next;
2072 unsigned long value;
2073 }
2074 apuinfo_list;
2075
2076 static apuinfo_list *head;
2077 static bfd_boolean apuinfo_set;
2078
2079 static void
2080 apuinfo_list_init (void)
2081 {
2082 head = NULL;
2083 apuinfo_set = FALSE;
2084 }
2085
2086 static void
2087 apuinfo_list_add (unsigned long value)
2088 {
2089 apuinfo_list *entry = head;
2090
2091 while (entry != NULL)
2092 {
2093 if (entry->value == value)
2094 return;
2095 entry = entry->next;
2096 }
2097
2098 entry = bfd_malloc (sizeof (* entry));
2099 if (entry == NULL)
2100 return;
2101
2102 entry->value = value;
2103 entry->next = head;
2104 head = entry;
2105 }
2106
2107 static unsigned
2108 apuinfo_list_length (void)
2109 {
2110 apuinfo_list *entry;
2111 unsigned long count;
2112
2113 for (entry = head, count = 0;
2114 entry;
2115 entry = entry->next)
2116 ++ count;
2117
2118 return count;
2119 }
2120
2121 static inline unsigned long
2122 apuinfo_list_element (unsigned long number)
2123 {
2124 apuinfo_list * entry;
2125
2126 for (entry = head;
2127 entry && number --;
2128 entry = entry->next)
2129 ;
2130
2131 return entry ? entry->value : 0;
2132 }
2133
2134 static void
2135 apuinfo_list_finish (void)
2136 {
2137 apuinfo_list *entry;
2138
2139 for (entry = head; entry;)
2140 {
2141 apuinfo_list *next = entry->next;
2142 free (entry);
2143 entry = next;
2144 }
2145
2146 head = NULL;
2147 }
2148
2149 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2150 #define APUINFO_LABEL "APUinfo"
2151
2152 /* Scan the input BFDs and create a linked list of
2153 the APUinfo values that will need to be emitted. */
2154
2155 static void
2156 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2157 {
2158 bfd *ibfd;
2159 asection *asec;
2160 char *buffer = NULL;
2161 bfd_size_type largest_input_size = 0;
2162 unsigned i;
2163 unsigned long length;
2164 const char *error_message = NULL;
2165
2166 if (link_info == NULL)
2167 return;
2168
2169 apuinfo_list_init ();
2170
2171 /* Read in the input sections contents. */
2172 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2173 {
2174 unsigned long datum;
2175
2176 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2177 if (asec == NULL)
2178 continue;
2179
2180 error_message = _("corrupt %s section in %B");
2181 length = asec->size;
2182 if (length < 20)
2183 goto fail;
2184
2185 apuinfo_set = TRUE;
2186 if (largest_input_size < asec->size)
2187 {
2188 if (buffer)
2189 free (buffer);
2190 largest_input_size = asec->size;
2191 buffer = bfd_malloc (largest_input_size);
2192 if (!buffer)
2193 return;
2194 }
2195
2196 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2197 || (bfd_bread (buffer, length, ibfd) != length))
2198 {
2199 error_message = _("unable to read in %s section from %B");
2200 goto fail;
2201 }
2202
2203 /* Verify the contents of the header. Note - we have to
2204 extract the values this way in order to allow for a
2205 host whose endian-ness is different from the target. */
2206 datum = bfd_get_32 (ibfd, buffer);
2207 if (datum != sizeof APUINFO_LABEL)
2208 goto fail;
2209
2210 datum = bfd_get_32 (ibfd, buffer + 8);
2211 if (datum != 0x2)
2212 goto fail;
2213
2214 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2215 goto fail;
2216
2217 /* Get the number of bytes used for apuinfo entries. */
2218 datum = bfd_get_32 (ibfd, buffer + 4);
2219 if (datum + 20 != length)
2220 goto fail;
2221
2222 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2223 for (i = 0; i < datum; i += 4)
2224 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2225 }
2226
2227 error_message = NULL;
2228
2229 if (apuinfo_set)
2230 {
2231 /* Compute the size of the output section. */
2232 unsigned num_entries = apuinfo_list_length ();
2233
2234 /* Set the output section size, if it exists. */
2235 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2236
2237 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2238 {
2239 ibfd = abfd;
2240 error_message = _("warning: unable to set size of %s section in %B");
2241 }
2242 }
2243
2244 fail:
2245 if (buffer)
2246 free (buffer);
2247
2248 if (error_message)
2249 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2250 }
2251
2252 /* Prevent the output section from accumulating the input sections'
2253 contents. We have already stored this in our linked list structure. */
2254
2255 static bfd_boolean
2256 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2257 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2258 asection *asec,
2259 bfd_byte *contents ATTRIBUTE_UNUSED)
2260 {
2261 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2262 }
2263
2264 /* Finally we can generate the output section. */
2265
2266 static void
2267 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2268 {
2269 bfd_byte *buffer;
2270 asection *asec;
2271 unsigned i;
2272 unsigned num_entries;
2273 bfd_size_type length;
2274
2275 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2276 if (asec == NULL)
2277 return;
2278
2279 if (!apuinfo_set)
2280 return;
2281
2282 length = asec->size;
2283 if (length < 20)
2284 return;
2285
2286 buffer = bfd_malloc (length);
2287 if (buffer == NULL)
2288 {
2289 (*_bfd_error_handler)
2290 (_("failed to allocate space for new APUinfo section."));
2291 return;
2292 }
2293
2294 /* Create the apuinfo header. */
2295 num_entries = apuinfo_list_length ();
2296 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2297 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2298 bfd_put_32 (abfd, 0x2, buffer + 8);
2299 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2300
2301 length = 20;
2302 for (i = 0; i < num_entries; i++)
2303 {
2304 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2305 length += 4;
2306 }
2307
2308 if (length != asec->size)
2309 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2310
2311 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2312 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2313
2314 free (buffer);
2315
2316 apuinfo_list_finish ();
2317 }
2318 \f
2319 static bfd_boolean
2320 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2321 {
2322 bfd_byte buf[GLINK_ENTRY_SIZE];
2323
2324 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2325 return FALSE;
2326
2327 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2328 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2329 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2330 && bfd_get_32 (abfd, buf + 12) == BCTR);
2331 }
2332
2333 static bfd_boolean
2334 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2335 {
2336 bfd_vma vma = *(bfd_vma *) ptr;
2337 return ((section->flags & SEC_ALLOC) != 0
2338 && section->vma <= vma
2339 && vma < section->vma + section->size);
2340 }
2341
2342 static long
2343 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2344 long dynsymcount, asymbol **dynsyms,
2345 asymbol **ret)
2346 {
2347 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2348 asection *plt, *relplt, *dynamic, *glink;
2349 bfd_vma glink_vma = 0;
2350 bfd_vma resolv_vma = 0;
2351 bfd_vma stub_vma;
2352 asymbol *s;
2353 arelent *p;
2354 long count, i;
2355 size_t size;
2356 char *names;
2357 bfd_byte buf[4];
2358
2359 *ret = NULL;
2360
2361 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2362 return 0;
2363
2364 if (dynsymcount <= 0)
2365 return 0;
2366
2367 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2368 if (relplt == NULL)
2369 return 0;
2370
2371 plt = bfd_get_section_by_name (abfd, ".plt");
2372 if (plt == NULL)
2373 return 0;
2374
2375 /* Call common code to handle old-style executable PLTs. */
2376 if (elf_section_flags (plt) & SHF_EXECINSTR)
2377 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2378 dynsymcount, dynsyms, ret);
2379
2380 /* If this object was prelinked, the prelinker stored the address
2381 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2382 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2383 if (dynamic != NULL)
2384 {
2385 bfd_byte *dynbuf, *extdyn, *extdynend;
2386 size_t extdynsize;
2387 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2388
2389 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2390 return -1;
2391
2392 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2393 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2394
2395 extdyn = dynbuf;
2396 extdynend = extdyn + dynamic->size;
2397 for (; extdyn < extdynend; extdyn += extdynsize)
2398 {
2399 Elf_Internal_Dyn dyn;
2400 (*swap_dyn_in) (abfd, extdyn, &dyn);
2401
2402 if (dyn.d_tag == DT_NULL)
2403 break;
2404
2405 if (dyn.d_tag == DT_PPC_GOT)
2406 {
2407 unsigned int g_o_t = dyn.d_un.d_val;
2408 asection *got = bfd_get_section_by_name (abfd, ".got");
2409 if (got != NULL
2410 && bfd_get_section_contents (abfd, got, buf,
2411 g_o_t - got->vma + 4, 4))
2412 glink_vma = bfd_get_32 (abfd, buf);
2413 break;
2414 }
2415 }
2416 free (dynbuf);
2417 }
2418
2419 /* Otherwise we read the first plt entry. */
2420 if (glink_vma == 0)
2421 {
2422 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2423 glink_vma = bfd_get_32 (abfd, buf);
2424 }
2425
2426 if (glink_vma == 0)
2427 return 0;
2428
2429 /* The .glink section usually does not survive the final
2430 link; search for the section (usually .text) where the
2431 glink stubs now reside. */
2432 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2433 if (glink == NULL)
2434 return 0;
2435
2436 /* Determine glink PLT resolver by reading the relative branch
2437 from the first glink stub. */
2438 if (bfd_get_section_contents (abfd, glink, buf,
2439 glink_vma - glink->vma, 4))
2440 {
2441 unsigned int insn = bfd_get_32 (abfd, buf);
2442
2443 /* The first glink stub may either branch to the resolver ... */
2444 insn ^= B;
2445 if ((insn & ~0x3fffffc) == 0)
2446 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2447
2448 /* ... or fall through a bunch of NOPs. */
2449 else if ((insn ^ B ^ NOP) == 0)
2450 for (i = 4;
2451 bfd_get_section_contents (abfd, glink, buf,
2452 glink_vma - glink->vma + i, 4);
2453 i += 4)
2454 if (bfd_get_32 (abfd, buf) != NOP)
2455 {
2456 resolv_vma = glink_vma + i;
2457 break;
2458 }
2459 }
2460
2461 count = relplt->size / sizeof (Elf32_External_Rela);
2462 stub_vma = glink_vma - (bfd_vma) count * 16;
2463 /* If the stubs are those for -shared/-pie then we might have
2464 multiple stubs for each plt entry. If that is the case then
2465 there is no way to associate stubs with their plt entries short
2466 of figuring out the GOT pointer value used in the stub. */
2467 if (!is_nonpic_glink_stub (abfd, glink,
2468 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2469 return 0;
2470
2471 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2472 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2473 return -1;
2474
2475 size = count * sizeof (asymbol);
2476 p = relplt->relocation;
2477 for (i = 0; i < count; i++, p++)
2478 {
2479 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2480 if (p->addend != 0)
2481 size += sizeof ("+0x") - 1 + 8;
2482 }
2483
2484 size += sizeof (asymbol) + sizeof ("__glink");
2485
2486 if (resolv_vma)
2487 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2488
2489 s = *ret = bfd_malloc (size);
2490 if (s == NULL)
2491 return -1;
2492
2493 names = (char *) (s + count + 1 + (resolv_vma != 0));
2494 p = relplt->relocation;
2495 for (i = 0; i < count; i++, p++)
2496 {
2497 size_t len;
2498
2499 *s = **p->sym_ptr_ptr;
2500 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2501 we are defining a symbol, ensure one of them is set. */
2502 if ((s->flags & BSF_LOCAL) == 0)
2503 s->flags |= BSF_GLOBAL;
2504 s->flags |= BSF_SYNTHETIC;
2505 s->section = glink;
2506 s->value = stub_vma - glink->vma;
2507 s->name = names;
2508 s->udata.p = NULL;
2509 len = strlen ((*p->sym_ptr_ptr)->name);
2510 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2511 names += len;
2512 if (p->addend != 0)
2513 {
2514 memcpy (names, "+0x", sizeof ("+0x") - 1);
2515 names += sizeof ("+0x") - 1;
2516 bfd_sprintf_vma (abfd, names, p->addend);
2517 names += strlen (names);
2518 }
2519 memcpy (names, "@plt", sizeof ("@plt"));
2520 names += sizeof ("@plt");
2521 ++s;
2522 stub_vma += 16;
2523 }
2524
2525 /* Add a symbol at the start of the glink branch table. */
2526 memset (s, 0, sizeof *s);
2527 s->the_bfd = abfd;
2528 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2529 s->section = glink;
2530 s->value = glink_vma - glink->vma;
2531 s->name = names;
2532 memcpy (names, "__glink", sizeof ("__glink"));
2533 names += sizeof ("__glink");
2534 s++;
2535 count++;
2536
2537 if (resolv_vma)
2538 {
2539 /* Add a symbol for the glink PLT resolver. */
2540 memset (s, 0, sizeof *s);
2541 s->the_bfd = abfd;
2542 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2543 s->section = glink;
2544 s->value = resolv_vma - glink->vma;
2545 s->name = names;
2546 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2547 names += sizeof ("__glink_PLTresolve");
2548 s++;
2549 count++;
2550 }
2551
2552 return count;
2553 }
2554 \f
2555 /* The following functions are specific to the ELF linker, while
2556 functions above are used generally. They appear in this file more
2557 or less in the order in which they are called. eg.
2558 ppc_elf_check_relocs is called early in the link process,
2559 ppc_elf_finish_dynamic_sections is one of the last functions
2560 called. */
2561
2562 /* The PPC linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_elf_dyn_relocs
2569 {
2570 struct ppc_elf_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track PLT entries needed for a given symbol. We might need more
2583 than one glink entry per symbol when generating a pic binary. */
2584 struct plt_entry
2585 {
2586 struct plt_entry *next;
2587
2588 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2589 This field stores the offset into .got2 used to initialise the
2590 GOT pointer reg. It will always be at least 32768. (Current
2591 gcc always uses an offset of 32768, but ld -r will pack .got2
2592 sections together resulting in larger offsets). */
2593 bfd_vma addend;
2594
2595 /* The .got2 section. */
2596 asection *sec;
2597
2598 /* PLT refcount or offset. */
2599 union
2600 {
2601 bfd_signed_vma refcount;
2602 bfd_vma offset;
2603 } plt;
2604
2605 /* .glink stub offset. */
2606 bfd_vma glink_offset;
2607 };
2608
2609 /* Of those relocs that might be copied as dynamic relocs, this function
2610 selects those that must be copied when linking a shared library,
2611 even when the symbol is local. */
2612
2613 static int
2614 must_be_dyn_reloc (struct bfd_link_info *info,
2615 enum elf_ppc_reloc_type r_type)
2616 {
2617 switch (r_type)
2618 {
2619 default:
2620 return 1;
2621
2622 case R_PPC_REL24:
2623 case R_PPC_REL14:
2624 case R_PPC_REL14_BRTAKEN:
2625 case R_PPC_REL14_BRNTAKEN:
2626 case R_PPC_REL32:
2627 return 0;
2628
2629 case R_PPC_TPREL32:
2630 case R_PPC_TPREL16:
2631 case R_PPC_TPREL16_LO:
2632 case R_PPC_TPREL16_HI:
2633 case R_PPC_TPREL16_HA:
2634 return !info->executable;
2635 }
2636 }
2637
2638 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2639 copying dynamic variables from a shared lib into an app's dynbss
2640 section, and instead use a dynamic relocation to point into the
2641 shared lib. */
2642 #define ELIMINATE_COPY_RELOCS 1
2643
2644 /* PPC ELF linker hash entry. */
2645
2646 struct ppc_elf_link_hash_entry
2647 {
2648 struct elf_link_hash_entry elf;
2649
2650 /* If this symbol is used in the linker created sections, the processor
2651 specific backend uses this field to map the field into the offset
2652 from the beginning of the section. */
2653 elf_linker_section_pointers_t *linker_section_pointer;
2654
2655 /* Track dynamic relocs copied for this symbol. */
2656 struct ppc_elf_dyn_relocs *dyn_relocs;
2657
2658 /* Contexts in which symbol is used in the GOT (or TOC).
2659 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2660 corresponding relocs are encountered during check_relocs.
2661 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2662 indicate the corresponding GOT entry type is not needed. */
2663 #define TLS_GD 1 /* GD reloc. */
2664 #define TLS_LD 2 /* LD reloc. */
2665 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2666 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2667 #define TLS_TLS 16 /* Any TLS reloc. */
2668 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2669 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2670 char tls_mask;
2671
2672 /* Nonzero if we have seen a small data relocation referring to this
2673 symbol. */
2674 unsigned char has_sda_refs;
2675 };
2676
2677 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2678
2679 /* PPC ELF linker hash table. */
2680
2681 struct ppc_elf_link_hash_table
2682 {
2683 struct elf_link_hash_table elf;
2684
2685 /* Short-cuts to get to dynamic linker sections. */
2686 asection *got;
2687 asection *relgot;
2688 asection *glink;
2689 asection *plt;
2690 asection *relplt;
2691 asection *iplt;
2692 asection *reliplt;
2693 asection *dynbss;
2694 asection *relbss;
2695 asection *dynsbss;
2696 asection *relsbss;
2697 elf_linker_section_t sdata[2];
2698 asection *sbss;
2699
2700 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2701 asection *srelplt2;
2702
2703 /* The .got.plt section (VxWorks only)*/
2704 asection *sgotplt;
2705
2706 /* Shortcut to __tls_get_addr. */
2707 struct elf_link_hash_entry *tls_get_addr;
2708
2709 /* The bfd that forced an old-style PLT. */
2710 bfd *old_bfd;
2711
2712 /* TLS local dynamic got entry handling. */
2713 union {
2714 bfd_signed_vma refcount;
2715 bfd_vma offset;
2716 } tlsld_got;
2717
2718 /* Offset of branch table to PltResolve function in glink. */
2719 bfd_vma glink_pltresolve;
2720
2721 /* Size of reserved GOT entries. */
2722 unsigned int got_header_size;
2723 /* Non-zero if allocating the header left a gap. */
2724 unsigned int got_gap;
2725
2726 /* The type of PLT we have chosen to use. */
2727 enum ppc_elf_plt_type plt_type;
2728
2729 /* Set if we should emit symbols for stubs. */
2730 unsigned int emit_stub_syms:1;
2731
2732 /* Set if __tls_get_addr optimization should not be done. */
2733 unsigned int no_tls_get_addr_opt:1;
2734
2735 /* True if the target system is VxWorks. */
2736 unsigned int is_vxworks:1;
2737
2738 /* The size of PLT entries. */
2739 int plt_entry_size;
2740 /* The distance between adjacent PLT slots. */
2741 int plt_slot_size;
2742 /* The size of the first PLT entry. */
2743 int plt_initial_entry_size;
2744
2745 /* Small local sym cache. */
2746 struct sym_cache sym_cache;
2747 };
2748
2749 /* Rename some of the generic section flags to better document how they
2750 are used here. */
2751
2752 /* Nonzero if this section has TLS related relocations. */
2753 #define has_tls_reloc sec_flg0
2754
2755 /* Nonzero if this section has a call to __tls_get_addr. */
2756 #define has_tls_get_addr_call sec_flg1
2757
2758 /* Get the PPC ELF linker hash table from a link_info structure. */
2759
2760 #define ppc_elf_hash_table(p) \
2761 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2762 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2763
2764 /* Create an entry in a PPC ELF linker hash table. */
2765
2766 static struct bfd_hash_entry *
2767 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2768 struct bfd_hash_table *table,
2769 const char *string)
2770 {
2771 /* Allocate the structure if it has not already been allocated by a
2772 subclass. */
2773 if (entry == NULL)
2774 {
2775 entry = bfd_hash_allocate (table,
2776 sizeof (struct ppc_elf_link_hash_entry));
2777 if (entry == NULL)
2778 return entry;
2779 }
2780
2781 /* Call the allocation method of the superclass. */
2782 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2783 if (entry != NULL)
2784 {
2785 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2786 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2787 ppc_elf_hash_entry (entry)->tls_mask = 0;
2788 }
2789
2790 return entry;
2791 }
2792
2793 /* Create a PPC ELF linker hash table. */
2794
2795 static struct bfd_link_hash_table *
2796 ppc_elf_link_hash_table_create (bfd *abfd)
2797 {
2798 struct ppc_elf_link_hash_table *ret;
2799
2800 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2801 if (ret == NULL)
2802 return NULL;
2803
2804 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2805 ppc_elf_link_hash_newfunc,
2806 sizeof (struct ppc_elf_link_hash_entry),
2807 PPC32_ELF_DATA))
2808 {
2809 free (ret);
2810 return NULL;
2811 }
2812
2813 ret->elf.init_plt_refcount.refcount = 0;
2814 ret->elf.init_plt_refcount.glist = NULL;
2815 ret->elf.init_plt_offset.offset = 0;
2816 ret->elf.init_plt_offset.glist = NULL;
2817
2818 ret->sdata[0].name = ".sdata";
2819 ret->sdata[0].sym_name = "_SDA_BASE_";
2820 ret->sdata[0].bss_name = ".sbss";
2821
2822 ret->sdata[1].name = ".sdata2";
2823 ret->sdata[1].sym_name = "_SDA2_BASE_";
2824 ret->sdata[1].bss_name = ".sbss2";
2825
2826 ret->plt_entry_size = 12;
2827 ret->plt_slot_size = 8;
2828 ret->plt_initial_entry_size = 72;
2829
2830 return &ret->elf.root;
2831 }
2832
2833 /* Create .got and the related sections. */
2834
2835 static bfd_boolean
2836 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2837 {
2838 struct ppc_elf_link_hash_table *htab;
2839 asection *s;
2840 flagword flags;
2841
2842 if (!_bfd_elf_create_got_section (abfd, info))
2843 return FALSE;
2844
2845 htab = ppc_elf_hash_table (info);
2846 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2847 if (s == NULL)
2848 abort ();
2849
2850 if (htab->is_vxworks)
2851 {
2852 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2853 if (!htab->sgotplt)
2854 abort ();
2855 }
2856 else
2857 {
2858 /* The powerpc .got has a blrl instruction in it. Mark it
2859 executable. */
2860 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2861 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2862 if (!bfd_set_section_flags (abfd, s, flags))
2863 return FALSE;
2864 }
2865
2866 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2867 if (!htab->relgot)
2868 abort ();
2869
2870 return TRUE;
2871 }
2872
2873 static bfd_boolean
2874 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2875 {
2876 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2877 asection *s;
2878 flagword flags;
2879
2880 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2881 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2882 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2883 htab->glink = s;
2884 if (s == NULL
2885 || !bfd_set_section_alignment (abfd, s, 4))
2886 return FALSE;
2887
2888 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2889 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2890 htab->iplt = s;
2891 if (s == NULL
2892 || !bfd_set_section_alignment (abfd, s, 4))
2893 return FALSE;
2894
2895 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2896 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2897 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2898 htab->reliplt = s;
2899 if (s == NULL
2900 || ! bfd_set_section_alignment (abfd, s, 2))
2901 return FALSE;
2902 return TRUE;
2903 }
2904
2905 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2906 to output sections (just like _bfd_elf_create_dynamic_sections has
2907 to create .dynbss and .rela.bss). */
2908
2909 static bfd_boolean
2910 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2911 {
2912 struct ppc_elf_link_hash_table *htab;
2913 asection *s;
2914 flagword flags;
2915
2916 htab = ppc_elf_hash_table (info);
2917
2918 if (htab->got == NULL
2919 && !ppc_elf_create_got (abfd, info))
2920 return FALSE;
2921
2922 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2923 return FALSE;
2924
2925 if (htab->glink == NULL
2926 && !ppc_elf_create_glink (abfd, info))
2927 return FALSE;
2928
2929 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2930 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2931 SEC_ALLOC | SEC_LINKER_CREATED);
2932 htab->dynsbss = s;
2933 if (s == NULL)
2934 return FALSE;
2935
2936 if (! info->shared)
2937 {
2938 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2939 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2940 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2941 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2942 htab->relsbss = s;
2943 if (s == NULL
2944 || ! bfd_set_section_alignment (abfd, s, 2))
2945 return FALSE;
2946 }
2947
2948 if (htab->is_vxworks
2949 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2950 return FALSE;
2951
2952 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2953 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2954 if (s == NULL)
2955 abort ();
2956
2957 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2958 if (htab->plt_type == PLT_VXWORKS)
2959 /* The VxWorks PLT is a loaded section with contents. */
2960 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2961 return bfd_set_section_flags (abfd, s, flags);
2962 }
2963
2964 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2965
2966 static void
2967 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2968 struct elf_link_hash_entry *dir,
2969 struct elf_link_hash_entry *ind)
2970 {
2971 struct ppc_elf_link_hash_entry *edir, *eind;
2972
2973 edir = (struct ppc_elf_link_hash_entry *) dir;
2974 eind = (struct ppc_elf_link_hash_entry *) ind;
2975
2976 if (eind->dyn_relocs != NULL)
2977 {
2978 if (edir->dyn_relocs != NULL)
2979 {
2980 struct ppc_elf_dyn_relocs **pp;
2981 struct ppc_elf_dyn_relocs *p;
2982
2983 /* Add reloc counts against the indirect sym to the direct sym
2984 list. Merge any entries against the same section. */
2985 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2986 {
2987 struct ppc_elf_dyn_relocs *q;
2988
2989 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2990 if (q->sec == p->sec)
2991 {
2992 q->pc_count += p->pc_count;
2993 q->count += p->count;
2994 *pp = p->next;
2995 break;
2996 }
2997 if (q == NULL)
2998 pp = &p->next;
2999 }
3000 *pp = edir->dyn_relocs;
3001 }
3002
3003 edir->dyn_relocs = eind->dyn_relocs;
3004 eind->dyn_relocs = NULL;
3005 }
3006
3007 edir->tls_mask |= eind->tls_mask;
3008 edir->has_sda_refs |= eind->has_sda_refs;
3009
3010 /* If called to transfer flags for a weakdef during processing
3011 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3012 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3013 if (!(ELIMINATE_COPY_RELOCS
3014 && eind->elf.root.type != bfd_link_hash_indirect
3015 && edir->elf.dynamic_adjusted))
3016 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3017
3018 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3019 edir->elf.ref_regular |= eind->elf.ref_regular;
3020 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3021 edir->elf.needs_plt |= eind->elf.needs_plt;
3022 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3023
3024 /* If we were called to copy over info for a weak sym, that's all. */
3025 if (eind->elf.root.type != bfd_link_hash_indirect)
3026 return;
3027
3028 /* Copy over the GOT refcount entries that we may have already seen to
3029 the symbol which just became indirect. */
3030 edir->elf.got.refcount += eind->elf.got.refcount;
3031 eind->elf.got.refcount = 0;
3032
3033 /* And plt entries. */
3034 if (eind->elf.plt.plist != NULL)
3035 {
3036 if (edir->elf.plt.plist != NULL)
3037 {
3038 struct plt_entry **entp;
3039 struct plt_entry *ent;
3040
3041 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3042 {
3043 struct plt_entry *dent;
3044
3045 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3046 if (dent->sec == ent->sec && dent->addend == ent->addend)
3047 {
3048 dent->plt.refcount += ent->plt.refcount;
3049 *entp = ent->next;
3050 break;
3051 }
3052 if (dent == NULL)
3053 entp = &ent->next;
3054 }
3055 *entp = edir->elf.plt.plist;
3056 }
3057
3058 edir->elf.plt.plist = eind->elf.plt.plist;
3059 eind->elf.plt.plist = NULL;
3060 }
3061
3062 if (eind->elf.dynindx != -1)
3063 {
3064 if (edir->elf.dynindx != -1)
3065 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3066 edir->elf.dynstr_index);
3067 edir->elf.dynindx = eind->elf.dynindx;
3068 edir->elf.dynstr_index = eind->elf.dynstr_index;
3069 eind->elf.dynindx = -1;
3070 eind->elf.dynstr_index = 0;
3071 }
3072 }
3073
3074 /* Hook called by the linker routine which adds symbols from an object
3075 file. We use it to put .comm items in .sbss, and not .bss. */
3076
3077 static bfd_boolean
3078 ppc_elf_add_symbol_hook (bfd *abfd,
3079 struct bfd_link_info *info,
3080 Elf_Internal_Sym *sym,
3081 const char **namep ATTRIBUTE_UNUSED,
3082 flagword *flagsp ATTRIBUTE_UNUSED,
3083 asection **secp,
3084 bfd_vma *valp)
3085 {
3086 if (sym->st_shndx == SHN_COMMON
3087 && !info->relocatable
3088 && is_ppc_elf (info->output_bfd)
3089 && sym->st_size <= elf_gp_size (abfd))
3090 {
3091 /* Common symbols less than or equal to -G nn bytes are automatically
3092 put into .sbss. */
3093 struct ppc_elf_link_hash_table *htab;
3094
3095 htab = ppc_elf_hash_table (info);
3096 if (htab->sbss == NULL)
3097 {
3098 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3099
3100 if (!htab->elf.dynobj)
3101 htab->elf.dynobj = abfd;
3102
3103 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3104 ".sbss",
3105 flags);
3106 if (htab->sbss == NULL)
3107 return FALSE;
3108 }
3109
3110 *secp = htab->sbss;
3111 *valp = sym->st_size;
3112 }
3113
3114 if ((abfd->flags & DYNAMIC) == 0
3115 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3116 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3117
3118 return TRUE;
3119 }
3120 \f
3121 static bfd_boolean
3122 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3123 {
3124 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3125
3126 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3127 TRUE, FALSE, TRUE);
3128 if (lsect->sym == NULL)
3129 return FALSE;
3130 if (lsect->sym->root.type == bfd_link_hash_new)
3131 lsect->sym->non_elf = 0;
3132 lsect->sym->ref_regular = 1;
3133 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3134 return TRUE;
3135 }
3136
3137 /* Create a special linker section. */
3138
3139 static bfd_boolean
3140 ppc_elf_create_linker_section (bfd *abfd,
3141 struct bfd_link_info *info,
3142 flagword flags,
3143 elf_linker_section_t *lsect)
3144 {
3145 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3146 asection *s;
3147
3148 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3149 | SEC_LINKER_CREATED);
3150
3151 /* Record the first bfd that needs the special sections. */
3152 if (!htab->elf.dynobj)
3153 htab->elf.dynobj = abfd;
3154
3155 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3156 lsect->name,
3157 flags);
3158 if (s == NULL
3159 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3160 return FALSE;
3161 lsect->section = s;
3162
3163 return create_sdata_sym (info, lsect);
3164 }
3165
3166 /* Find a linker generated pointer with a given addend and type. */
3167
3168 static elf_linker_section_pointers_t *
3169 elf_find_pointer_linker_section
3170 (elf_linker_section_pointers_t *linker_pointers,
3171 bfd_vma addend,
3172 elf_linker_section_t *lsect)
3173 {
3174 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3175 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3176 return linker_pointers;
3177
3178 return NULL;
3179 }
3180
3181 /* Allocate a pointer to live in a linker created section. */
3182
3183 static bfd_boolean
3184 elf_create_pointer_linker_section (bfd *abfd,
3185 elf_linker_section_t *lsect,
3186 struct elf_link_hash_entry *h,
3187 const Elf_Internal_Rela *rel)
3188 {
3189 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3190 elf_linker_section_pointers_t *linker_section_ptr;
3191 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3192 bfd_size_type amt;
3193
3194 BFD_ASSERT (lsect != NULL);
3195
3196 /* Is this a global symbol? */
3197 if (h != NULL)
3198 {
3199 struct ppc_elf_link_hash_entry *eh;
3200
3201 /* Has this symbol already been allocated? If so, our work is done. */
3202 eh = (struct ppc_elf_link_hash_entry *) h;
3203 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3204 rel->r_addend,
3205 lsect))
3206 return TRUE;
3207
3208 ptr_linker_section_ptr = &eh->linker_section_pointer;
3209 }
3210 else
3211 {
3212 BFD_ASSERT (is_ppc_elf (abfd));
3213
3214 /* Allocation of a pointer to a local symbol. */
3215 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3216
3217 /* Allocate a table to hold the local symbols if first time. */
3218 if (!ptr)
3219 {
3220 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3221
3222 amt = num_symbols;
3223 amt *= sizeof (elf_linker_section_pointers_t *);
3224 ptr = bfd_zalloc (abfd, amt);
3225
3226 if (!ptr)
3227 return FALSE;
3228
3229 elf_local_ptr_offsets (abfd) = ptr;
3230 }
3231
3232 /* Has this symbol already been allocated? If so, our work is done. */
3233 if (elf_find_pointer_linker_section (ptr[r_symndx],
3234 rel->r_addend,
3235 lsect))
3236 return TRUE;
3237
3238 ptr_linker_section_ptr = &ptr[r_symndx];
3239 }
3240
3241 /* Allocate space for a pointer in the linker section, and allocate
3242 a new pointer record from internal memory. */
3243 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3244 amt = sizeof (elf_linker_section_pointers_t);
3245 linker_section_ptr = bfd_alloc (abfd, amt);
3246
3247 if (!linker_section_ptr)
3248 return FALSE;
3249
3250 linker_section_ptr->next = *ptr_linker_section_ptr;
3251 linker_section_ptr->addend = rel->r_addend;
3252 linker_section_ptr->lsect = lsect;
3253 *ptr_linker_section_ptr = linker_section_ptr;
3254
3255 linker_section_ptr->offset = lsect->section->size;
3256 lsect->section->size += 4;
3257
3258 #ifdef DEBUG
3259 fprintf (stderr,
3260 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3261 lsect->name, (long) linker_section_ptr->offset,
3262 (long) lsect->section->size);
3263 #endif
3264
3265 return TRUE;
3266 }
3267
3268 static struct plt_entry **
3269 update_local_sym_info (bfd *abfd,
3270 Elf_Internal_Shdr *symtab_hdr,
3271 unsigned long r_symndx,
3272 int tls_type)
3273 {
3274 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3275 struct plt_entry **local_plt;
3276 char *local_got_tls_masks;
3277
3278 if (local_got_refcounts == NULL)
3279 {
3280 bfd_size_type size = symtab_hdr->sh_info;
3281
3282 size *= (sizeof (*local_got_refcounts)
3283 + sizeof (*local_plt)
3284 + sizeof (*local_got_tls_masks));
3285 local_got_refcounts = bfd_zalloc (abfd, size);
3286 if (local_got_refcounts == NULL)
3287 return NULL;
3288 elf_local_got_refcounts (abfd) = local_got_refcounts;
3289 }
3290
3291 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3292 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3293 local_got_tls_masks[r_symndx] |= tls_type;
3294 if (tls_type != PLT_IFUNC)
3295 local_got_refcounts[r_symndx] += 1;
3296 return local_plt + r_symndx;
3297 }
3298
3299 static bfd_boolean
3300 update_plt_info (bfd *abfd, struct plt_entry **plist,
3301 asection *sec, bfd_vma addend)
3302 {
3303 struct plt_entry *ent;
3304
3305 if (addend < 32768)
3306 sec = NULL;
3307 for (ent = *plist; ent != NULL; ent = ent->next)
3308 if (ent->sec == sec && ent->addend == addend)
3309 break;
3310 if (ent == NULL)
3311 {
3312 bfd_size_type amt = sizeof (*ent);
3313 ent = bfd_alloc (abfd, amt);
3314 if (ent == NULL)
3315 return FALSE;
3316 ent->next = *plist;
3317 ent->sec = sec;
3318 ent->addend = addend;
3319 ent->plt.refcount = 0;
3320 *plist = ent;
3321 }
3322 ent->plt.refcount += 1;
3323 return TRUE;
3324 }
3325
3326 static struct plt_entry *
3327 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3328 {
3329 struct plt_entry *ent;
3330
3331 if (addend < 32768)
3332 sec = NULL;
3333 for (ent = *plist; ent != NULL; ent = ent->next)
3334 if (ent->sec == sec && ent->addend == addend)
3335 break;
3336 return ent;
3337 }
3338
3339 static bfd_boolean
3340 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3341 {
3342 return (r_type == R_PPC_PLTREL24
3343 || r_type == R_PPC_LOCAL24PC
3344 || r_type == R_PPC_REL24
3345 || r_type == R_PPC_REL14
3346 || r_type == R_PPC_REL14_BRTAKEN
3347 || r_type == R_PPC_REL14_BRNTAKEN
3348 || r_type == R_PPC_ADDR24
3349 || r_type == R_PPC_ADDR14
3350 || r_type == R_PPC_ADDR14_BRTAKEN
3351 || r_type == R_PPC_ADDR14_BRNTAKEN);
3352 }
3353
3354 static void
3355 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3356 {
3357 (*_bfd_error_handler)
3358 (_("%B: relocation %s cannot be used when making a shared object"),
3359 abfd,
3360 ppc_elf_howto_table[r_type]->name);
3361 bfd_set_error (bfd_error_bad_value);
3362 }
3363
3364 /* Look through the relocs for a section during the first phase, and
3365 allocate space in the global offset table or procedure linkage
3366 table. */
3367
3368 static bfd_boolean
3369 ppc_elf_check_relocs (bfd *abfd,
3370 struct bfd_link_info *info,
3371 asection *sec,
3372 const Elf_Internal_Rela *relocs)
3373 {
3374 struct ppc_elf_link_hash_table *htab;
3375 Elf_Internal_Shdr *symtab_hdr;
3376 struct elf_link_hash_entry **sym_hashes;
3377 const Elf_Internal_Rela *rel;
3378 const Elf_Internal_Rela *rel_end;
3379 asection *got2, *sreloc;
3380 struct elf_link_hash_entry *tga;
3381
3382 if (info->relocatable)
3383 return TRUE;
3384
3385 /* Don't do anything special with non-loaded, non-alloced sections.
3386 In particular, any relocs in such sections should not affect GOT
3387 and PLT reference counting (ie. we don't allow them to create GOT
3388 or PLT entries), there's no possibility or desire to optimize TLS
3389 relocs, and there's not much point in propagating relocs to shared
3390 libs that the dynamic linker won't relocate. */
3391 if ((sec->flags & SEC_ALLOC) == 0)
3392 return TRUE;
3393
3394 #ifdef DEBUG
3395 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3396 sec, abfd);
3397 #endif
3398
3399 BFD_ASSERT (is_ppc_elf (abfd));
3400
3401 /* Initialize howto table if not already done. */
3402 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3403 ppc_elf_howto_init ();
3404
3405 htab = ppc_elf_hash_table (info);
3406 if (htab->glink == NULL)
3407 {
3408 if (htab->elf.dynobj == NULL)
3409 htab->elf.dynobj = abfd;
3410 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3411 return FALSE;
3412 }
3413 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3414 FALSE, FALSE, TRUE);
3415 symtab_hdr = &elf_symtab_hdr (abfd);
3416 sym_hashes = elf_sym_hashes (abfd);
3417 got2 = bfd_get_section_by_name (abfd, ".got2");
3418 sreloc = NULL;
3419
3420 rel_end = relocs + sec->reloc_count;
3421 for (rel = relocs; rel < rel_end; rel++)
3422 {
3423 unsigned long r_symndx;
3424 enum elf_ppc_reloc_type r_type;
3425 struct elf_link_hash_entry *h;
3426 int tls_type;
3427
3428 r_symndx = ELF32_R_SYM (rel->r_info);
3429 if (r_symndx < symtab_hdr->sh_info)
3430 h = NULL;
3431 else
3432 {
3433 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3434 while (h->root.type == bfd_link_hash_indirect
3435 || h->root.type == bfd_link_hash_warning)
3436 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3437 }
3438
3439 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3440 This shows up in particular in an R_PPC_ADDR32 in the eabi
3441 startup code. */
3442 if (h != NULL
3443 && htab->got == NULL
3444 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3445 {
3446 if (htab->elf.dynobj == NULL)
3447 htab->elf.dynobj = abfd;
3448 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3449 return FALSE;
3450 BFD_ASSERT (h == htab->elf.hgot);
3451 }
3452
3453 tls_type = 0;
3454 r_type = ELF32_R_TYPE (rel->r_info);
3455 if (h == NULL && !htab->is_vxworks)
3456 {
3457 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3458 abfd, r_symndx);
3459 if (isym == NULL)
3460 return FALSE;
3461
3462 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3463 && (!info->shared
3464 || is_branch_reloc (r_type)))
3465 {
3466 struct plt_entry **ifunc;
3467 bfd_vma addend;
3468
3469 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3470 PLT_IFUNC);
3471 if (ifunc == NULL)
3472 return FALSE;
3473
3474 /* STT_GNU_IFUNC symbols must have a PLT entry;
3475 In a non-pie executable even when there are
3476 no plt calls. */
3477 addend = 0;
3478 if (r_type == R_PPC_PLTREL24)
3479 {
3480 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3481 if (info->shared)
3482 addend = rel->r_addend;
3483 }
3484 if (!update_plt_info (abfd, ifunc, got2, addend))
3485 return FALSE;
3486 }
3487 }
3488
3489 if (!htab->is_vxworks
3490 && is_branch_reloc (r_type)
3491 && h != NULL
3492 && h == tga)
3493 {
3494 if (rel != relocs
3495 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3496 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3497 /* We have a new-style __tls_get_addr call with a marker
3498 reloc. */
3499 ;
3500 else
3501 /* Mark this section as having an old-style call. */
3502 sec->has_tls_get_addr_call = 1;
3503 }
3504
3505 switch (r_type)
3506 {
3507 case R_PPC_TLSGD:
3508 case R_PPC_TLSLD:
3509 /* These special tls relocs tie a call to __tls_get_addr with
3510 its parameter symbol. */
3511 break;
3512
3513 case R_PPC_GOT_TLSLD16:
3514 case R_PPC_GOT_TLSLD16_LO:
3515 case R_PPC_GOT_TLSLD16_HI:
3516 case R_PPC_GOT_TLSLD16_HA:
3517 tls_type = TLS_TLS | TLS_LD;
3518 goto dogottls;
3519
3520 case R_PPC_GOT_TLSGD16:
3521 case R_PPC_GOT_TLSGD16_LO:
3522 case R_PPC_GOT_TLSGD16_HI:
3523 case R_PPC_GOT_TLSGD16_HA:
3524 tls_type = TLS_TLS | TLS_GD;
3525 goto dogottls;
3526
3527 case R_PPC_GOT_TPREL16:
3528 case R_PPC_GOT_TPREL16_LO:
3529 case R_PPC_GOT_TPREL16_HI:
3530 case R_PPC_GOT_TPREL16_HA:
3531 if (!info->executable)
3532 info->flags |= DF_STATIC_TLS;
3533 tls_type = TLS_TLS | TLS_TPREL;
3534 goto dogottls;
3535
3536 case R_PPC_GOT_DTPREL16:
3537 case R_PPC_GOT_DTPREL16_LO:
3538 case R_PPC_GOT_DTPREL16_HI:
3539 case R_PPC_GOT_DTPREL16_HA:
3540 tls_type = TLS_TLS | TLS_DTPREL;
3541 dogottls:
3542 sec->has_tls_reloc = 1;
3543 /* Fall thru */
3544
3545 /* GOT16 relocations */
3546 case R_PPC_GOT16:
3547 case R_PPC_GOT16_LO:
3548 case R_PPC_GOT16_HI:
3549 case R_PPC_GOT16_HA:
3550 /* This symbol requires a global offset table entry. */
3551 if (htab->got == NULL)
3552 {
3553 if (htab->elf.dynobj == NULL)
3554 htab->elf.dynobj = abfd;
3555 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3556 return FALSE;
3557 }
3558 if (h != NULL)
3559 {
3560 h->got.refcount += 1;
3561 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3562 }
3563 else
3564 /* This is a global offset table entry for a local symbol. */
3565 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3566 return FALSE;
3567
3568 /* We may also need a plt entry if the symbol turns out to be
3569 an ifunc. */
3570 if (h != NULL && !info->shared)
3571 {
3572 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3573 return FALSE;
3574 }
3575 break;
3576
3577 /* Indirect .sdata relocation. */
3578 case R_PPC_EMB_SDAI16:
3579 if (info->shared)
3580 {
3581 bad_shared_reloc (abfd, r_type);
3582 return FALSE;
3583 }
3584 if (htab->sdata[0].section == NULL
3585 && !ppc_elf_create_linker_section (abfd, info, 0,
3586 &htab->sdata[0]))
3587 return FALSE;
3588 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3589 h, rel))
3590 return FALSE;
3591 if (h != NULL)
3592 {
3593 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3594 h->non_got_ref = TRUE;
3595 }
3596 break;
3597
3598 /* Indirect .sdata2 relocation. */
3599 case R_PPC_EMB_SDA2I16:
3600 if (info->shared)
3601 {
3602 bad_shared_reloc (abfd, r_type);
3603 return FALSE;
3604 }
3605 if (htab->sdata[1].section == NULL
3606 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3607 &htab->sdata[1]))
3608 return FALSE;
3609 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3610 h, rel))
3611 return FALSE;
3612 if (h != NULL)
3613 {
3614 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3615 h->non_got_ref = TRUE;
3616 }
3617 break;
3618
3619 case R_PPC_SDAREL16:
3620 if (htab->sdata[0].sym == NULL
3621 && !create_sdata_sym (info, &htab->sdata[0]))
3622 return FALSE;
3623 if (h != NULL)
3624 {
3625 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3626 h->non_got_ref = TRUE;
3627 }
3628 break;
3629
3630 case R_PPC_EMB_SDA2REL:
3631 if (info->shared)
3632 {
3633 bad_shared_reloc (abfd, r_type);
3634 return FALSE;
3635 }
3636 if (htab->sdata[1].sym == NULL
3637 && !create_sdata_sym (info, &htab->sdata[1]))
3638 return FALSE;
3639 if (h != NULL)
3640 {
3641 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3642 h->non_got_ref = TRUE;
3643 }
3644 break;
3645
3646 case R_PPC_EMB_SDA21:
3647 case R_PPC_EMB_RELSDA:
3648 if (info->shared)
3649 {
3650 bad_shared_reloc (abfd, r_type);
3651 return FALSE;
3652 }
3653 if (htab->sdata[0].sym == NULL
3654 && !create_sdata_sym (info, &htab->sdata[0]))
3655 return FALSE;
3656 if (htab->sdata[1].sym == NULL
3657 && !create_sdata_sym (info, &htab->sdata[1]))
3658 return FALSE;
3659 if (h != NULL)
3660 {
3661 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3662 h->non_got_ref = TRUE;
3663 }
3664 break;
3665
3666 case R_PPC_EMB_NADDR32:
3667 case R_PPC_EMB_NADDR16:
3668 case R_PPC_EMB_NADDR16_LO:
3669 case R_PPC_EMB_NADDR16_HI:
3670 case R_PPC_EMB_NADDR16_HA:
3671 if (info->shared)
3672 {
3673 bad_shared_reloc (abfd, r_type);
3674 return FALSE;
3675 }
3676 if (h != NULL)
3677 h->non_got_ref = TRUE;
3678 break;
3679
3680 case R_PPC_PLTREL24:
3681 if (h == NULL)
3682 break;
3683 /* Fall through */
3684 case R_PPC_PLT32:
3685 case R_PPC_PLTREL32:
3686 case R_PPC_PLT16_LO:
3687 case R_PPC_PLT16_HI:
3688 case R_PPC_PLT16_HA:
3689 #ifdef DEBUG
3690 fprintf (stderr, "Reloc requires a PLT entry\n");
3691 #endif
3692 /* This symbol requires a procedure linkage table entry. We
3693 actually build the entry in finish_dynamic_symbol,
3694 because this might be a case of linking PIC code without
3695 linking in any dynamic objects, in which case we don't
3696 need to generate a procedure linkage table after all. */
3697
3698 if (h == NULL)
3699 {
3700 /* It does not make sense to have a procedure linkage
3701 table entry for a local symbol. */
3702 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3703 "local symbol"),
3704 abfd,
3705 sec,
3706 (long) rel->r_offset,
3707 ppc_elf_howto_table[r_type]->name);
3708 bfd_set_error (bfd_error_bad_value);
3709 return FALSE;
3710 }
3711 else
3712 {
3713 bfd_vma addend = 0;
3714
3715 if (r_type == R_PPC_PLTREL24)
3716 {
3717 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3718 if (info->shared)
3719 addend = rel->r_addend;
3720 }
3721 h->needs_plt = 1;
3722 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3723 return FALSE;
3724 }
3725 break;
3726
3727 /* The following relocations don't need to propagate the
3728 relocation if linking a shared object since they are
3729 section relative. */
3730 case R_PPC_SECTOFF:
3731 case R_PPC_SECTOFF_LO:
3732 case R_PPC_SECTOFF_HI:
3733 case R_PPC_SECTOFF_HA:
3734 case R_PPC_DTPREL16:
3735 case R_PPC_DTPREL16_LO:
3736 case R_PPC_DTPREL16_HI:
3737 case R_PPC_DTPREL16_HA:
3738 case R_PPC_TOC16:
3739 break;
3740
3741 case R_PPC_REL16:
3742 case R_PPC_REL16_LO:
3743 case R_PPC_REL16_HI:
3744 case R_PPC_REL16_HA:
3745 ppc_elf_tdata (abfd)->has_rel16 = 1;
3746 break;
3747
3748 /* These are just markers. */
3749 case R_PPC_TLS:
3750 case R_PPC_EMB_MRKREF:
3751 case R_PPC_NONE:
3752 case R_PPC_max:
3753 case R_PPC_RELAX:
3754 case R_PPC_RELAX_PLT:
3755 case R_PPC_RELAX_PLTREL24:
3756 break;
3757
3758 /* These should only appear in dynamic objects. */
3759 case R_PPC_COPY:
3760 case R_PPC_GLOB_DAT:
3761 case R_PPC_JMP_SLOT:
3762 case R_PPC_RELATIVE:
3763 case R_PPC_IRELATIVE:
3764 break;
3765
3766 /* These aren't handled yet. We'll report an error later. */
3767 case R_PPC_ADDR30:
3768 case R_PPC_EMB_RELSEC16:
3769 case R_PPC_EMB_RELST_LO:
3770 case R_PPC_EMB_RELST_HI:
3771 case R_PPC_EMB_RELST_HA:
3772 case R_PPC_EMB_BIT_FLD:
3773 break;
3774
3775 /* This refers only to functions defined in the shared library. */
3776 case R_PPC_LOCAL24PC:
3777 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3778 {
3779 htab->plt_type = PLT_OLD;
3780 htab->old_bfd = abfd;
3781 }
3782 break;
3783
3784 /* This relocation describes the C++ object vtable hierarchy.
3785 Reconstruct it for later use during GC. */
3786 case R_PPC_GNU_VTINHERIT:
3787 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3788 return FALSE;
3789 break;
3790
3791 /* This relocation describes which C++ vtable entries are actually
3792 used. Record for later use during GC. */
3793 case R_PPC_GNU_VTENTRY:
3794 BFD_ASSERT (h != NULL);
3795 if (h != NULL
3796 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3797 return FALSE;
3798 break;
3799
3800 /* We shouldn't really be seeing these. */
3801 case R_PPC_TPREL32:
3802 case R_PPC_TPREL16:
3803 case R_PPC_TPREL16_LO:
3804 case R_PPC_TPREL16_HI:
3805 case R_PPC_TPREL16_HA:
3806 if (!info->executable)
3807 info->flags |= DF_STATIC_TLS;
3808 goto dodyn;
3809
3810 /* Nor these. */
3811 case R_PPC_DTPMOD32:
3812 case R_PPC_DTPREL32:
3813 goto dodyn;
3814
3815 case R_PPC_REL32:
3816 if (h == NULL
3817 && got2 != NULL
3818 && (sec->flags & SEC_CODE) != 0
3819 && info->shared
3820 && htab->plt_type == PLT_UNSET)
3821 {
3822 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3823 the start of a function, which assembles to a REL32
3824 reference to .got2. If we detect one of these, then
3825 force the old PLT layout because the linker cannot
3826 reliably deduce the GOT pointer value needed for
3827 PLT call stubs. */
3828 asection *s;
3829 Elf_Internal_Sym *isym;
3830
3831 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3832 abfd, r_symndx);
3833 if (isym == NULL)
3834 return FALSE;
3835
3836 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3837 if (s == got2)
3838 {
3839 htab->plt_type = PLT_OLD;
3840 htab->old_bfd = abfd;
3841 }
3842 }
3843 if (h == NULL || h == htab->elf.hgot)
3844 break;
3845 /* fall through */
3846
3847 case R_PPC_ADDR32:
3848 case R_PPC_ADDR16:
3849 case R_PPC_ADDR16_LO:
3850 case R_PPC_ADDR16_HI:
3851 case R_PPC_ADDR16_HA:
3852 case R_PPC_UADDR32:
3853 case R_PPC_UADDR16:
3854 if (h != NULL && !info->shared)
3855 {
3856 /* We may need a plt entry if the symbol turns out to be
3857 a function defined in a dynamic object. */
3858 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3859 return FALSE;
3860
3861 /* We may need a copy reloc too. */
3862 h->non_got_ref = 1;
3863 h->pointer_equality_needed = 1;
3864 }
3865 goto dodyn;
3866
3867 case R_PPC_REL24:
3868 case R_PPC_REL14:
3869 case R_PPC_REL14_BRTAKEN:
3870 case R_PPC_REL14_BRNTAKEN:
3871 if (h == NULL)
3872 break;
3873 if (h == htab->elf.hgot)
3874 {
3875 if (htab->plt_type == PLT_UNSET)
3876 {
3877 htab->plt_type = PLT_OLD;
3878 htab->old_bfd = abfd;
3879 }
3880 break;
3881 }
3882 /* fall through */
3883
3884 case R_PPC_ADDR24:
3885 case R_PPC_ADDR14:
3886 case R_PPC_ADDR14_BRTAKEN:
3887 case R_PPC_ADDR14_BRNTAKEN:
3888 if (h != NULL && !info->shared)
3889 {
3890 /* We may need a plt entry if the symbol turns out to be
3891 a function defined in a dynamic object. */
3892 h->needs_plt = 1;
3893 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3894 return FALSE;
3895 break;
3896 }
3897
3898 dodyn:
3899 /* If we are creating a shared library, and this is a reloc
3900 against a global symbol, or a non PC relative reloc
3901 against a local symbol, then we need to copy the reloc
3902 into the shared library. However, if we are linking with
3903 -Bsymbolic, we do not need to copy a reloc against a
3904 global symbol which is defined in an object we are
3905 including in the link (i.e., DEF_REGULAR is set). At
3906 this point we have not seen all the input files, so it is
3907 possible that DEF_REGULAR is not set now but will be set
3908 later (it is never cleared). In case of a weak definition,
3909 DEF_REGULAR may be cleared later by a strong definition in
3910 a shared library. We account for that possibility below by
3911 storing information in the dyn_relocs field of the hash
3912 table entry. A similar situation occurs when creating
3913 shared libraries and symbol visibility changes render the
3914 symbol local.
3915
3916 If on the other hand, we are creating an executable, we
3917 may need to keep relocations for symbols satisfied by a
3918 dynamic library if we manage to avoid copy relocs for the
3919 symbol. */
3920 if ((info->shared
3921 && (must_be_dyn_reloc (info, r_type)
3922 || (h != NULL
3923 && (! info->symbolic
3924 || h->root.type == bfd_link_hash_defweak
3925 || !h->def_regular))))
3926 || (ELIMINATE_COPY_RELOCS
3927 && !info->shared
3928 && h != NULL
3929 && (h->root.type == bfd_link_hash_defweak
3930 || !h->def_regular)))
3931 {
3932 struct ppc_elf_dyn_relocs *p;
3933 struct ppc_elf_dyn_relocs **rel_head;
3934
3935 #ifdef DEBUG
3936 fprintf (stderr,
3937 "ppc_elf_check_relocs needs to "
3938 "create relocation for %s\n",
3939 (h && h->root.root.string
3940 ? h->root.root.string : "<unknown>"));
3941 #endif
3942 if (sreloc == NULL)
3943 {
3944 if (htab->elf.dynobj == NULL)
3945 htab->elf.dynobj = abfd;
3946
3947 sreloc = _bfd_elf_make_dynamic_reloc_section
3948 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3949
3950 if (sreloc == NULL)
3951 return FALSE;
3952 }
3953
3954 /* If this is a global symbol, we count the number of
3955 relocations we need for this symbol. */
3956 if (h != NULL)
3957 {
3958 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3959 }
3960 else
3961 {
3962 /* Track dynamic relocs needed for local syms too.
3963 We really need local syms available to do this
3964 easily. Oh well. */
3965 asection *s;
3966 void *vpp;
3967 Elf_Internal_Sym *isym;
3968
3969 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3970 abfd, r_symndx);
3971 if (isym == NULL)
3972 return FALSE;
3973
3974 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3975 if (s == NULL)
3976 s = sec;
3977
3978 vpp = &elf_section_data (s)->local_dynrel;
3979 rel_head = (struct ppc_elf_dyn_relocs **) vpp;
3980 }
3981
3982 p = *rel_head;
3983 if (p == NULL || p->sec != sec)
3984 {
3985 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3986 if (p == NULL)
3987 return FALSE;
3988 p->next = *rel_head;
3989 *rel_head = p;
3990 p->sec = sec;
3991 p->count = 0;
3992 p->pc_count = 0;
3993 }
3994
3995 p->count += 1;
3996 if (!must_be_dyn_reloc (info, r_type))
3997 p->pc_count += 1;
3998 }
3999
4000 break;
4001 }
4002 }
4003
4004 return TRUE;
4005 }
4006 \f
4007
4008 /* Merge object attributes from IBFD into OBFD. Raise an error if
4009 there are conflicting attributes. */
4010 static bfd_boolean
4011 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4012 {
4013 obj_attribute *in_attr, *in_attrs;
4014 obj_attribute *out_attr, *out_attrs;
4015
4016 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4017 {
4018 /* This is the first object. Copy the attributes. */
4019 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4020
4021 /* Use the Tag_null value to indicate the attributes have been
4022 initialized. */
4023 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4024
4025 return TRUE;
4026 }
4027
4028 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4029 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4030
4031 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4032 non-conflicting ones. */
4033 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4034 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4035 if (in_attr->i != out_attr->i)
4036 {
4037 out_attr->type = 1;
4038 if (out_attr->i == 0)
4039 out_attr->i = in_attr->i;
4040 else if (in_attr->i == 0)
4041 ;
4042 else if (out_attr->i == 1 && in_attr->i == 2)
4043 _bfd_error_handler
4044 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4045 else if (out_attr->i == 1 && in_attr->i == 3)
4046 _bfd_error_handler
4047 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4048 obfd, ibfd);
4049 else if (out_attr->i == 3 && in_attr->i == 1)
4050 _bfd_error_handler
4051 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4052 ibfd, obfd);
4053 else if (out_attr->i == 3 && in_attr->i == 2)
4054 _bfd_error_handler
4055 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4056 ibfd, obfd);
4057 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4058 _bfd_error_handler
4059 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4060 else if (in_attr->i > 3)
4061 _bfd_error_handler
4062 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4063 in_attr->i);
4064 else
4065 _bfd_error_handler
4066 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4067 out_attr->i);
4068 }
4069
4070 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4071 merge non-conflicting ones. */
4072 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4073 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4074 if (in_attr->i != out_attr->i)
4075 {
4076 const char *in_abi = NULL, *out_abi = NULL;
4077
4078 switch (in_attr->i)
4079 {
4080 case 1: in_abi = "generic"; break;
4081 case 2: in_abi = "AltiVec"; break;
4082 case 3: in_abi = "SPE"; break;
4083 }
4084
4085 switch (out_attr->i)
4086 {
4087 case 1: out_abi = "generic"; break;
4088 case 2: out_abi = "AltiVec"; break;
4089 case 3: out_abi = "SPE"; break;
4090 }
4091
4092 out_attr->type = 1;
4093 if (out_attr->i == 0)
4094 out_attr->i = in_attr->i;
4095 else if (in_attr->i == 0)
4096 ;
4097 /* For now, allow generic to transition to AltiVec or SPE
4098 without a warning. If GCC marked files with their stack
4099 alignment and used don't-care markings for files which are
4100 not affected by the vector ABI, we could warn about this
4101 case too. */
4102 else if (out_attr->i == 1)
4103 out_attr->i = in_attr->i;
4104 else if (in_attr->i == 1)
4105 ;
4106 else if (in_abi == NULL)
4107 _bfd_error_handler
4108 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4109 in_attr->i);
4110 else if (out_abi == NULL)
4111 _bfd_error_handler
4112 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4113 in_attr->i);
4114 else
4115 _bfd_error_handler
4116 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4117 ibfd, obfd, in_abi, out_abi);
4118 }
4119
4120 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4121 and merge non-conflicting ones. */
4122 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4123 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4124 if (in_attr->i != out_attr->i)
4125 {
4126 out_attr->type = 1;
4127 if (out_attr->i == 0)
4128 out_attr->i = in_attr->i;
4129 else if (in_attr->i == 0)
4130 ;
4131 else if (out_attr->i == 1 && in_attr->i == 2)
4132 _bfd_error_handler
4133 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4134 else if (out_attr->i == 2 && in_attr->i == 1)
4135 _bfd_error_handler
4136 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4137 else if (in_attr->i > 2)
4138 _bfd_error_handler
4139 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4140 in_attr->i);
4141 else
4142 _bfd_error_handler
4143 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4144 out_attr->i);
4145 }
4146
4147 /* Merge Tag_compatibility attributes and any common GNU ones. */
4148 _bfd_elf_merge_object_attributes (ibfd, obfd);
4149
4150 return TRUE;
4151 }
4152
4153 /* Merge backend specific data from an object file to the output
4154 object file when linking. */
4155
4156 static bfd_boolean
4157 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4158 {
4159 flagword old_flags;
4160 flagword new_flags;
4161 bfd_boolean error;
4162
4163 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4164 return TRUE;
4165
4166 /* Check if we have the same endianess. */
4167 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4168 return FALSE;
4169
4170 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4171 return FALSE;
4172
4173 new_flags = elf_elfheader (ibfd)->e_flags;
4174 old_flags = elf_elfheader (obfd)->e_flags;
4175 if (!elf_flags_init (obfd))
4176 {
4177 /* First call, no flags set. */
4178 elf_flags_init (obfd) = TRUE;
4179 elf_elfheader (obfd)->e_flags = new_flags;
4180 }
4181
4182 /* Compatible flags are ok. */
4183 else if (new_flags == old_flags)
4184 ;
4185
4186 /* Incompatible flags. */
4187 else
4188 {
4189 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4190 to be linked with either. */
4191 error = FALSE;
4192 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4193 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4194 {
4195 error = TRUE;
4196 (*_bfd_error_handler)
4197 (_("%B: compiled with -mrelocatable and linked with "
4198 "modules compiled normally"), ibfd);
4199 }
4200 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4201 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4202 {
4203 error = TRUE;
4204 (*_bfd_error_handler)
4205 (_("%B: compiled normally and linked with "
4206 "modules compiled with -mrelocatable"), ibfd);
4207 }
4208
4209 /* The output is -mrelocatable-lib iff both the input files are. */
4210 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4211 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4212
4213 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4214 but each input file is either -mrelocatable or -mrelocatable-lib. */
4215 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4216 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4217 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4218 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4219
4220 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4221 any module uses it. */
4222 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4223
4224 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4225 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4226
4227 /* Warn about any other mismatches. */
4228 if (new_flags != old_flags)
4229 {
4230 error = TRUE;
4231 (*_bfd_error_handler)
4232 (_("%B: uses different e_flags (0x%lx) fields "
4233 "than previous modules (0x%lx)"),
4234 ibfd, (long) new_flags, (long) old_flags);
4235 }
4236
4237 if (error)
4238 {
4239 bfd_set_error (bfd_error_bad_value);
4240 return FALSE;
4241 }
4242 }
4243
4244 return TRUE;
4245 }
4246 \f
4247 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4248 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4249 int
4250 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4251 struct bfd_link_info *info,
4252 enum ppc_elf_plt_type plt_style,
4253 int emit_stub_syms)
4254 {
4255 struct ppc_elf_link_hash_table *htab;
4256 flagword flags;
4257
4258 htab = ppc_elf_hash_table (info);
4259
4260 htab->emit_stub_syms = emit_stub_syms;
4261
4262 if (htab->plt_type == PLT_UNSET)
4263 {
4264 if (plt_style == PLT_OLD)
4265 htab->plt_type = PLT_OLD;
4266 else
4267 {
4268 bfd *ibfd;
4269 enum ppc_elf_plt_type plt_type = plt_style;
4270
4271 /* Look through the reloc flags left by ppc_elf_check_relocs.
4272 Use the old style bss plt if a file makes plt calls
4273 without using the new relocs, and if ld isn't given
4274 --secure-plt and we never see REL16 relocs. */
4275 if (plt_type == PLT_UNSET)
4276 plt_type = PLT_OLD;
4277 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4278 if (is_ppc_elf (ibfd))
4279 {
4280 if (ppc_elf_tdata (ibfd)->has_rel16)
4281 plt_type = PLT_NEW;
4282 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4283 {
4284 plt_type = PLT_OLD;
4285 htab->old_bfd = ibfd;
4286 break;
4287 }
4288 }
4289 htab->plt_type = plt_type;
4290 }
4291 }
4292 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4293 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4294
4295 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4296
4297 if (htab->plt_type == PLT_NEW)
4298 {
4299 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4300 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4301
4302 /* The new PLT is a loaded section. */
4303 if (htab->plt != NULL
4304 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4305 return -1;
4306
4307 /* The new GOT is not executable. */
4308 if (htab->got != NULL
4309 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4310 return -1;
4311 }
4312 else
4313 {
4314 /* Stop an unused .glink section from affecting .text alignment. */
4315 if (htab->glink != NULL
4316 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4317 return -1;
4318 }
4319 return htab->plt_type == PLT_NEW;
4320 }
4321 \f
4322 /* Return the section that should be marked against GC for a given
4323 relocation. */
4324
4325 static asection *
4326 ppc_elf_gc_mark_hook (asection *sec,
4327 struct bfd_link_info *info,
4328 Elf_Internal_Rela *rel,
4329 struct elf_link_hash_entry *h,
4330 Elf_Internal_Sym *sym)
4331 {
4332 if (h != NULL)
4333 switch (ELF32_R_TYPE (rel->r_info))
4334 {
4335 case R_PPC_GNU_VTINHERIT:
4336 case R_PPC_GNU_VTENTRY:
4337 return NULL;
4338 }
4339
4340 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4341 }
4342
4343 /* Update the got, plt and dynamic reloc reference counts for the
4344 section being removed. */
4345
4346 static bfd_boolean
4347 ppc_elf_gc_sweep_hook (bfd *abfd,
4348 struct bfd_link_info *info,
4349 asection *sec,
4350 const Elf_Internal_Rela *relocs)
4351 {
4352 struct ppc_elf_link_hash_table *htab;
4353 Elf_Internal_Shdr *symtab_hdr;
4354 struct elf_link_hash_entry **sym_hashes;
4355 bfd_signed_vma *local_got_refcounts;
4356 const Elf_Internal_Rela *rel, *relend;
4357 asection *got2;
4358
4359 if (info->relocatable)
4360 return TRUE;
4361
4362 if ((sec->flags & SEC_ALLOC) == 0)
4363 return TRUE;
4364
4365 elf_section_data (sec)->local_dynrel = NULL;
4366
4367 htab = ppc_elf_hash_table (info);
4368 symtab_hdr = &elf_symtab_hdr (abfd);
4369 sym_hashes = elf_sym_hashes (abfd);
4370 local_got_refcounts = elf_local_got_refcounts (abfd);
4371 got2 = bfd_get_section_by_name (abfd, ".got2");
4372
4373 relend = relocs + sec->reloc_count;
4374 for (rel = relocs; rel < relend; rel++)
4375 {
4376 unsigned long r_symndx;
4377 enum elf_ppc_reloc_type r_type;
4378 struct elf_link_hash_entry *h = NULL;
4379
4380 r_symndx = ELF32_R_SYM (rel->r_info);
4381 if (r_symndx >= symtab_hdr->sh_info)
4382 {
4383 struct ppc_elf_dyn_relocs **pp, *p;
4384 struct ppc_elf_link_hash_entry *eh;
4385
4386 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4387 while (h->root.type == bfd_link_hash_indirect
4388 || h->root.type == bfd_link_hash_warning)
4389 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4390 eh = (struct ppc_elf_link_hash_entry *) h;
4391
4392 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4393 if (p->sec == sec)
4394 {
4395 /* Everything must go for SEC. */
4396 *pp = p->next;
4397 break;
4398 }
4399 }
4400
4401 r_type = ELF32_R_TYPE (rel->r_info);
4402 if (!htab->is_vxworks
4403 && h == NULL
4404 && local_got_refcounts != NULL
4405 && (!info->shared
4406 || is_branch_reloc (r_type)))
4407 {
4408 struct plt_entry **local_plt = (struct plt_entry **)
4409 (local_got_refcounts + symtab_hdr->sh_info);
4410 char *local_got_tls_masks = (char *)
4411 (local_plt + symtab_hdr->sh_info);
4412 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4413 {
4414 struct plt_entry **ifunc = local_plt + r_symndx;
4415 bfd_vma addend = 0;
4416 struct plt_entry *ent;
4417
4418 if (r_type == R_PPC_PLTREL24 && info->shared)
4419 addend = rel->r_addend;
4420 ent = find_plt_ent (ifunc, got2, addend);
4421 if (ent->plt.refcount > 0)
4422 ent->plt.refcount -= 1;
4423 continue;
4424 }
4425 }
4426
4427 switch (r_type)
4428 {
4429 case R_PPC_GOT_TLSLD16:
4430 case R_PPC_GOT_TLSLD16_LO:
4431 case R_PPC_GOT_TLSLD16_HI:
4432 case R_PPC_GOT_TLSLD16_HA:
4433 case R_PPC_GOT_TLSGD16:
4434 case R_PPC_GOT_TLSGD16_LO:
4435 case R_PPC_GOT_TLSGD16_HI:
4436 case R_PPC_GOT_TLSGD16_HA:
4437 case R_PPC_GOT_TPREL16:
4438 case R_PPC_GOT_TPREL16_LO:
4439 case R_PPC_GOT_TPREL16_HI:
4440 case R_PPC_GOT_TPREL16_HA:
4441 case R_PPC_GOT_DTPREL16:
4442 case R_PPC_GOT_DTPREL16_LO:
4443 case R_PPC_GOT_DTPREL16_HI:
4444 case R_PPC_GOT_DTPREL16_HA:
4445 case R_PPC_GOT16:
4446 case R_PPC_GOT16_LO:
4447 case R_PPC_GOT16_HI:
4448 case R_PPC_GOT16_HA:
4449 if (h != NULL)
4450 {
4451 if (h->got.refcount > 0)
4452 h->got.refcount--;
4453 if (!info->shared)
4454 {
4455 struct plt_entry *ent;
4456
4457 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4458 if (ent != NULL && ent->plt.refcount > 0)
4459 ent->plt.refcount -= 1;
4460 }
4461 }
4462 else if (local_got_refcounts != NULL)
4463 {
4464 if (local_got_refcounts[r_symndx] > 0)
4465 local_got_refcounts[r_symndx]--;
4466 }
4467 break;
4468
4469 case R_PPC_REL24:
4470 case R_PPC_REL14:
4471 case R_PPC_REL14_BRTAKEN:
4472 case R_PPC_REL14_BRNTAKEN:
4473 case R_PPC_REL32:
4474 if (h == NULL || h == htab->elf.hgot)
4475 break;
4476 /* Fall thru */
4477
4478 case R_PPC_ADDR32:
4479 case R_PPC_ADDR24:
4480 case R_PPC_ADDR16:
4481 case R_PPC_ADDR16_LO:
4482 case R_PPC_ADDR16_HI:
4483 case R_PPC_ADDR16_HA:
4484 case R_PPC_ADDR14:
4485 case R_PPC_ADDR14_BRTAKEN:
4486 case R_PPC_ADDR14_BRNTAKEN:
4487 case R_PPC_UADDR32:
4488 case R_PPC_UADDR16:
4489 if (info->shared)
4490 break;
4491
4492 case R_PPC_PLT32:
4493 case R_PPC_PLTREL24:
4494 case R_PPC_PLTREL32:
4495 case R_PPC_PLT16_LO:
4496 case R_PPC_PLT16_HI:
4497 case R_PPC_PLT16_HA:
4498 if (h != NULL)
4499 {
4500 bfd_vma addend = 0;
4501 struct plt_entry *ent;
4502
4503 if (r_type == R_PPC_PLTREL24 && info->shared)
4504 addend = rel->r_addend;
4505 ent = find_plt_ent (&h->plt.plist, got2, addend);
4506 if (ent != NULL && ent->plt.refcount > 0)
4507 ent->plt.refcount -= 1;
4508 }
4509 break;
4510
4511 default:
4512 break;
4513 }
4514 }
4515 return TRUE;
4516 }
4517 \f
4518 /* Set plt output section type, htab->tls_get_addr, and call the
4519 generic ELF tls_setup function. */
4520
4521 asection *
4522 ppc_elf_tls_setup (bfd *obfd,
4523 struct bfd_link_info *info,
4524 int no_tls_get_addr_opt)
4525 {
4526 struct ppc_elf_link_hash_table *htab;
4527
4528 htab = ppc_elf_hash_table (info);
4529 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4530 FALSE, FALSE, TRUE);
4531 if (!no_tls_get_addr_opt)
4532 {
4533 struct elf_link_hash_entry *opt, *tga;
4534 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4535 FALSE, FALSE, TRUE);
4536 if (opt != NULL
4537 && (opt->root.type == bfd_link_hash_defined
4538 || opt->root.type == bfd_link_hash_defweak))
4539 {
4540 /* If glibc supports an optimized __tls_get_addr call stub,
4541 signalled by the presence of __tls_get_addr_opt, and we'll
4542 be calling __tls_get_addr via a plt call stub, then
4543 make __tls_get_addr point to __tls_get_addr_opt. */
4544 tga = htab->tls_get_addr;
4545 if (htab->elf.dynamic_sections_created
4546 && tga != NULL
4547 && (tga->type == STT_FUNC
4548 || tga->needs_plt)
4549 && !(SYMBOL_CALLS_LOCAL (info, tga)
4550 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4551 && tga->root.type == bfd_link_hash_undefweak)))
4552 {
4553 struct plt_entry *ent;
4554 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4555 if (ent->plt.refcount > 0)
4556 break;
4557 if (ent != NULL)
4558 {
4559 tga->root.type = bfd_link_hash_indirect;
4560 tga->root.u.i.link = &opt->root;
4561 ppc_elf_copy_indirect_symbol (info, opt, tga);
4562 if (opt->dynindx != -1)
4563 {
4564 /* Use __tls_get_addr_opt in dynamic relocations. */
4565 opt->dynindx = -1;
4566 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4567 opt->dynstr_index);
4568 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4569 return FALSE;
4570 }
4571 htab->tls_get_addr = opt;
4572 }
4573 }
4574 }
4575 else
4576 no_tls_get_addr_opt = TRUE;
4577 }
4578 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4579 if (htab->plt_type == PLT_NEW
4580 && htab->plt != NULL
4581 && htab->plt->output_section != NULL)
4582 {
4583 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4584 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4585 }
4586
4587 return _bfd_elf_tls_setup (obfd, info);
4588 }
4589
4590 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4591 HASH. */
4592
4593 static bfd_boolean
4594 branch_reloc_hash_match (const bfd *ibfd,
4595 const Elf_Internal_Rela *rel,
4596 const struct elf_link_hash_entry *hash)
4597 {
4598 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4599 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4600 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4601
4602 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4603 {
4604 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4605 struct elf_link_hash_entry *h;
4606
4607 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4608 while (h->root.type == bfd_link_hash_indirect
4609 || h->root.type == bfd_link_hash_warning)
4610 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4611 if (h == hash)
4612 return TRUE;
4613 }
4614 return FALSE;
4615 }
4616
4617 /* Run through all the TLS relocs looking for optimization
4618 opportunities. */
4619
4620 bfd_boolean
4621 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4622 struct bfd_link_info *info)
4623 {
4624 bfd *ibfd;
4625 asection *sec;
4626 struct ppc_elf_link_hash_table *htab;
4627 int pass;
4628
4629 if (info->relocatable || !info->executable)
4630 return TRUE;
4631
4632 htab = ppc_elf_hash_table (info);
4633 /* Make two passes through the relocs. First time check that tls
4634 relocs involved in setting up a tls_get_addr call are indeed
4635 followed by such a call. If they are not, exclude them from
4636 the optimizations done on the second pass. */
4637 for (pass = 0; pass < 2; ++pass)
4638 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4639 {
4640 Elf_Internal_Sym *locsyms = NULL;
4641 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4642 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4643
4644 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4645 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4646 {
4647 Elf_Internal_Rela *relstart, *rel, *relend;
4648
4649 /* Read the relocations. */
4650 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4651 info->keep_memory);
4652 if (relstart == NULL)
4653 return FALSE;
4654
4655 relend = relstart + sec->reloc_count;
4656 for (rel = relstart; rel < relend; rel++)
4657 {
4658 enum elf_ppc_reloc_type r_type;
4659 unsigned long r_symndx;
4660 struct elf_link_hash_entry *h = NULL;
4661 char *tls_mask;
4662 char tls_set, tls_clear;
4663 bfd_boolean is_local;
4664 int expecting_tls_get_addr;
4665 bfd_signed_vma *got_count;
4666
4667 r_symndx = ELF32_R_SYM (rel->r_info);
4668 if (r_symndx >= symtab_hdr->sh_info)
4669 {
4670 struct elf_link_hash_entry **sym_hashes;
4671
4672 sym_hashes = elf_sym_hashes (ibfd);
4673 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4674 while (h->root.type == bfd_link_hash_indirect
4675 || h->root.type == bfd_link_hash_warning)
4676 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4677 }
4678
4679 expecting_tls_get_addr = 0;
4680 is_local = FALSE;
4681 if (h == NULL
4682 || !h->def_dynamic)
4683 is_local = TRUE;
4684
4685 r_type = ELF32_R_TYPE (rel->r_info);
4686 switch (r_type)
4687 {
4688 case R_PPC_GOT_TLSLD16:
4689 case R_PPC_GOT_TLSLD16_LO:
4690 expecting_tls_get_addr = 1;
4691 /* Fall thru */
4692
4693 case R_PPC_GOT_TLSLD16_HI:
4694 case R_PPC_GOT_TLSLD16_HA:
4695 /* These relocs should never be against a symbol
4696 defined in a shared lib. Leave them alone if
4697 that turns out to be the case. */
4698 if (!is_local)
4699 continue;
4700
4701 /* LD -> LE */
4702 tls_set = 0;
4703 tls_clear = TLS_LD;
4704 break;
4705
4706 case R_PPC_GOT_TLSGD16:
4707 case R_PPC_GOT_TLSGD16_LO:
4708 expecting_tls_get_addr = 1;
4709 /* Fall thru */
4710
4711 case R_PPC_GOT_TLSGD16_HI:
4712 case R_PPC_GOT_TLSGD16_HA:
4713 if (is_local)
4714 /* GD -> LE */
4715 tls_set = 0;
4716 else
4717 /* GD -> IE */
4718 tls_set = TLS_TLS | TLS_TPRELGD;
4719 tls_clear = TLS_GD;
4720 break;
4721
4722 case R_PPC_GOT_TPREL16:
4723 case R_PPC_GOT_TPREL16_LO:
4724 case R_PPC_GOT_TPREL16_HI:
4725 case R_PPC_GOT_TPREL16_HA:
4726 if (is_local)
4727 {
4728 /* IE -> LE */
4729 tls_set = 0;
4730 tls_clear = TLS_TPREL;
4731 break;
4732 }
4733 else
4734 continue;
4735
4736 case R_PPC_TLSGD:
4737 case R_PPC_TLSLD:
4738 expecting_tls_get_addr = 2;
4739 tls_set = 0;
4740 tls_clear = 0;
4741 break;
4742
4743 default:
4744 continue;
4745 }
4746
4747 if (pass == 0)
4748 {
4749 if (!expecting_tls_get_addr
4750 || (expecting_tls_get_addr == 1
4751 && !sec->has_tls_get_addr_call))
4752 continue;
4753
4754 if (rel + 1 < relend
4755 && branch_reloc_hash_match (ibfd, rel + 1,
4756 htab->tls_get_addr))
4757 continue;
4758
4759 /* Uh oh, we didn't find the expected call. We
4760 could just mark this symbol to exclude it
4761 from tls optimization but it's safer to skip
4762 the entire section. */
4763 sec->has_tls_reloc = 0;
4764 break;
4765 }
4766
4767 if (expecting_tls_get_addr)
4768 {
4769 struct plt_entry *ent;
4770 bfd_vma addend = 0;
4771
4772 if (info->shared
4773 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4774 addend = rel[1].r_addend;
4775 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4776 got2, addend);
4777 if (ent != NULL && ent->plt.refcount > 0)
4778 ent->plt.refcount -= 1;
4779
4780 if (expecting_tls_get_addr == 2)
4781 continue;
4782 }
4783
4784 if (h != NULL)
4785 {
4786 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4787 got_count = &h->got.refcount;
4788 }
4789 else
4790 {
4791 Elf_Internal_Sym *sym;
4792 bfd_signed_vma *lgot_refs;
4793 struct plt_entry **local_plt;
4794 char *lgot_masks;
4795
4796 if (locsyms == NULL)
4797 {
4798 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4799 if (locsyms == NULL)
4800 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4801 symtab_hdr->sh_info,
4802 0, NULL, NULL, NULL);
4803 if (locsyms == NULL)
4804 {
4805 if (elf_section_data (sec)->relocs != relstart)
4806 free (relstart);
4807 return FALSE;
4808 }
4809 }
4810 sym = locsyms + r_symndx;
4811 lgot_refs = elf_local_got_refcounts (ibfd);
4812 if (lgot_refs == NULL)
4813 abort ();
4814 local_plt = (struct plt_entry **)
4815 (lgot_refs + symtab_hdr->sh_info);
4816 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4817 tls_mask = &lgot_masks[r_symndx];
4818 got_count = &lgot_refs[r_symndx];
4819 }
4820
4821 if (tls_set == 0)
4822 {
4823 /* We managed to get rid of a got entry. */
4824 if (*got_count > 0)
4825 *got_count -= 1;
4826 }
4827
4828 *tls_mask |= tls_set;
4829 *tls_mask &= ~tls_clear;
4830 }
4831
4832 if (elf_section_data (sec)->relocs != relstart)
4833 free (relstart);
4834 }
4835
4836 if (locsyms != NULL
4837 && (symtab_hdr->contents != (unsigned char *) locsyms))
4838 {
4839 if (!info->keep_memory)
4840 free (locsyms);
4841 else
4842 symtab_hdr->contents = (unsigned char *) locsyms;
4843 }
4844 }
4845 return TRUE;
4846 }
4847 \f
4848 /* Return true if we have dynamic relocs that apply to read-only sections. */
4849
4850 static bfd_boolean
4851 readonly_dynrelocs (struct elf_link_hash_entry *h)
4852 {
4853 struct ppc_elf_dyn_relocs *p;
4854
4855 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4856 {
4857 asection *s = p->sec->output_section;
4858
4859 if (s != NULL
4860 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4861 == (SEC_READONLY | SEC_ALLOC)))
4862 return TRUE;
4863 }
4864 return FALSE;
4865 }
4866
4867 /* Adjust a symbol defined by a dynamic object and referenced by a
4868 regular object. The current definition is in some section of the
4869 dynamic object, but we're not including those sections. We have to
4870 change the definition to something the rest of the link can
4871 understand. */
4872
4873 static bfd_boolean
4874 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4875 struct elf_link_hash_entry *h)
4876 {
4877 struct ppc_elf_link_hash_table *htab;
4878 asection *s;
4879
4880 #ifdef DEBUG
4881 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4882 h->root.root.string);
4883 #endif
4884
4885 /* Make sure we know what is going on here. */
4886 htab = ppc_elf_hash_table (info);
4887 BFD_ASSERT (htab->elf.dynobj != NULL
4888 && (h->needs_plt
4889 || h->type == STT_GNU_IFUNC
4890 || h->u.weakdef != NULL
4891 || (h->def_dynamic
4892 && h->ref_regular
4893 && !h->def_regular)));
4894
4895 /* Deal with function syms. */
4896 if (h->type == STT_FUNC
4897 || h->type == STT_GNU_IFUNC
4898 || h->needs_plt)
4899 {
4900 /* Clear procedure linkage table information for any symbol that
4901 won't need a .plt entry. */
4902 struct plt_entry *ent;
4903 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4904 if (ent->plt.refcount > 0)
4905 break;
4906 if (ent == NULL
4907 || (h->type != STT_GNU_IFUNC
4908 && (SYMBOL_CALLS_LOCAL (info, h)
4909 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4910 && h->root.type == bfd_link_hash_undefweak))))
4911 {
4912 /* A PLT entry is not required/allowed when:
4913
4914 1. We are not using ld.so; because then the PLT entry
4915 can't be set up, so we can't use one. In this case,
4916 ppc_elf_adjust_dynamic_symbol won't even be called.
4917
4918 2. GC has rendered the entry unused.
4919
4920 3. We know for certain that a call to this symbol
4921 will go to this object, or will remain undefined. */
4922 h->plt.plist = NULL;
4923 h->needs_plt = 0;
4924 }
4925 else
4926 {
4927 /* After adjust_dynamic_symbol, non_got_ref set in the
4928 non-shared case means that we have allocated space in
4929 .dynbss for the symbol and thus dyn_relocs for this
4930 symbol should be discarded.
4931 If we get here we know we are making a PLT entry for this
4932 symbol, and in an executable we'd normally resolve
4933 relocations against this symbol to the PLT entry. Allow
4934 dynamic relocs if the reference is weak, and the dynamic
4935 relocs will not cause text relocation. */
4936 if (!h->ref_regular_nonweak
4937 && h->non_got_ref
4938 && h->type != STT_GNU_IFUNC
4939 && !htab->is_vxworks
4940 && !ppc_elf_hash_entry (h)->has_sda_refs
4941 && !readonly_dynrelocs (h))
4942 h->non_got_ref = 0;
4943 }
4944 return TRUE;
4945 }
4946 else
4947 h->plt.plist = NULL;
4948
4949 /* If this is a weak symbol, and there is a real definition, the
4950 processor independent code will have arranged for us to see the
4951 real definition first, and we can just use the same value. */
4952 if (h->u.weakdef != NULL)
4953 {
4954 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4955 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4956 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4957 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4958 if (ELIMINATE_COPY_RELOCS)
4959 h->non_got_ref = h->u.weakdef->non_got_ref;
4960 return TRUE;
4961 }
4962
4963 /* This is a reference to a symbol defined by a dynamic object which
4964 is not a function. */
4965
4966 /* If we are creating a shared library, we must presume that the
4967 only references to the symbol are via the global offset table.
4968 For such cases we need not do anything here; the relocations will
4969 be handled correctly by relocate_section. */
4970 if (info->shared)
4971 return TRUE;
4972
4973 /* If there are no references to this symbol that do not use the
4974 GOT, we don't need to generate a copy reloc. */
4975 if (!h->non_got_ref)
4976 return TRUE;
4977
4978 /* If we didn't find any dynamic relocs in read-only sections, then
4979 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4980 We can't do this if there are any small data relocations. This
4981 doesn't work on VxWorks, where we can not have dynamic
4982 relocations (other than copy and jump slot relocations) in an
4983 executable. */
4984 if (ELIMINATE_COPY_RELOCS
4985 && !ppc_elf_hash_entry (h)->has_sda_refs
4986 && !htab->is_vxworks
4987 && !h->def_regular
4988 && !readonly_dynrelocs (h))
4989 {
4990 h->non_got_ref = 0;
4991 return TRUE;
4992 }
4993
4994 if (h->size == 0)
4995 {
4996 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4997 h->root.root.string);
4998 return TRUE;
4999 }
5000
5001 /* We must allocate the symbol in our .dynbss section, which will
5002 become part of the .bss section of the executable. There will be
5003 an entry for this symbol in the .dynsym section. The dynamic
5004 object will contain position independent code, so all references
5005 from the dynamic object to this symbol will go through the global
5006 offset table. The dynamic linker will use the .dynsym entry to
5007 determine the address it must put in the global offset table, so
5008 both the dynamic object and the regular object will refer to the
5009 same memory location for the variable.
5010
5011 Of course, if the symbol is referenced using SDAREL relocs, we
5012 must instead allocate it in .sbss. */
5013
5014 if (ppc_elf_hash_entry (h)->has_sda_refs)
5015 s = htab->dynsbss;
5016 else
5017 s = htab->dynbss;
5018 BFD_ASSERT (s != NULL);
5019
5020 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5021 copy the initial value out of the dynamic object and into the
5022 runtime process image. We need to remember the offset into the
5023 .rela.bss section we are going to use. */
5024 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5025 {
5026 asection *srel;
5027
5028 if (ppc_elf_hash_entry (h)->has_sda_refs)
5029 srel = htab->relsbss;
5030 else
5031 srel = htab->relbss;
5032 BFD_ASSERT (srel != NULL);
5033 srel->size += sizeof (Elf32_External_Rela);
5034 h->needs_copy = 1;
5035 }
5036
5037 return _bfd_elf_adjust_dynamic_copy (h, s);
5038 }
5039 \f
5040 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5041 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5042 specifying the addend on the plt relocation. For -fpic code, the sym
5043 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5044 xxxxxxxx.got2.plt_pic32.<callee>. */
5045
5046 static bfd_boolean
5047 add_stub_sym (struct plt_entry *ent,
5048 struct elf_link_hash_entry *h,
5049 struct bfd_link_info *info)
5050 {
5051 struct elf_link_hash_entry *sh;
5052 size_t len1, len2, len3;
5053 char *name;
5054 const char *stub;
5055 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5056
5057 if (info->shared)
5058 stub = ".plt_pic32.";
5059 else
5060 stub = ".plt_call32.";
5061
5062 len1 = strlen (h->root.root.string);
5063 len2 = strlen (stub);
5064 len3 = 0;
5065 if (ent->sec)
5066 len3 = strlen (ent->sec->name);
5067 name = bfd_malloc (len1 + len2 + len3 + 9);
5068 if (name == NULL)
5069 return FALSE;
5070 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5071 if (ent->sec)
5072 memcpy (name + 8, ent->sec->name, len3);
5073 memcpy (name + 8 + len3, stub, len2);
5074 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5075 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5076 if (sh == NULL)
5077 return FALSE;
5078 if (sh->root.type == bfd_link_hash_new)
5079 {
5080 sh->root.type = bfd_link_hash_defined;
5081 sh->root.u.def.section = htab->glink;
5082 sh->root.u.def.value = ent->glink_offset;
5083 sh->ref_regular = 1;
5084 sh->def_regular = 1;
5085 sh->ref_regular_nonweak = 1;
5086 sh->forced_local = 1;
5087 sh->non_elf = 0;
5088 }
5089 return TRUE;
5090 }
5091
5092 /* Allocate NEED contiguous space in .got, and return the offset.
5093 Handles allocation of the got header when crossing 32k. */
5094
5095 static bfd_vma
5096 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5097 {
5098 bfd_vma where;
5099 unsigned int max_before_header;
5100
5101 if (htab->plt_type == PLT_VXWORKS)
5102 {
5103 where = htab->got->size;
5104 htab->got->size += need;
5105 }
5106 else
5107 {
5108 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5109 if (need <= htab->got_gap)
5110 {
5111 where = max_before_header - htab->got_gap;
5112 htab->got_gap -= need;
5113 }
5114 else
5115 {
5116 if (htab->got->size + need > max_before_header
5117 && htab->got->size <= max_before_header)
5118 {
5119 htab->got_gap = max_before_header - htab->got->size;
5120 htab->got->size = max_before_header + htab->got_header_size;
5121 }
5122 where = htab->got->size;
5123 htab->got->size += need;
5124 }
5125 }
5126 return where;
5127 }
5128
5129 /* Allocate space in associated reloc sections for dynamic relocs. */
5130
5131 static bfd_boolean
5132 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5133 {
5134 struct bfd_link_info *info = inf;
5135 struct ppc_elf_link_hash_entry *eh;
5136 struct ppc_elf_link_hash_table *htab;
5137 struct ppc_elf_dyn_relocs *p;
5138
5139 if (h->root.type == bfd_link_hash_indirect)
5140 return TRUE;
5141
5142 if (h->root.type == bfd_link_hash_warning)
5143 /* When warning symbols are created, they **replace** the "real"
5144 entry in the hash table, thus we never get to see the real
5145 symbol in a hash traversal. So look at it now. */
5146 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5147
5148 htab = ppc_elf_hash_table (info);
5149 if (htab->elf.dynamic_sections_created
5150 || h->type == STT_GNU_IFUNC)
5151 {
5152 struct plt_entry *ent;
5153 bfd_boolean doneone = FALSE;
5154 bfd_vma plt_offset = 0, glink_offset = 0;
5155 bfd_boolean dyn;
5156
5157 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5158 if (ent->plt.refcount > 0)
5159 {
5160 /* Make sure this symbol is output as a dynamic symbol. */
5161 if (h->dynindx == -1
5162 && !h->forced_local
5163 && !h->def_regular
5164 && htab->elf.dynamic_sections_created)
5165 {
5166 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5167 return FALSE;
5168 }
5169
5170 dyn = htab->elf.dynamic_sections_created;
5171 if (info->shared
5172 || h->type == STT_GNU_IFUNC
5173 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5174 {
5175 asection *s = htab->plt;
5176 if (!dyn || h->dynindx == -1)
5177 s = htab->iplt;
5178
5179 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5180 {
5181 if (!doneone)
5182 {
5183 plt_offset = s->size;
5184 s->size += 4;
5185 }
5186 ent->plt.offset = plt_offset;
5187
5188 s = htab->glink;
5189 if (!doneone || info->shared)
5190 {
5191 glink_offset = s->size;
5192 s->size += GLINK_ENTRY_SIZE;
5193 if (h == htab->tls_get_addr
5194 && !htab->no_tls_get_addr_opt)
5195 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5196 }
5197 if (!doneone
5198 && !info->shared
5199 && h->def_dynamic
5200 && !h->def_regular)
5201 {
5202 h->root.u.def.section = s;
5203 h->root.u.def.value = glink_offset;
5204 }
5205 ent->glink_offset = glink_offset;
5206
5207 if (htab->emit_stub_syms
5208 && !add_stub_sym (ent, h, info))
5209 return FALSE;
5210 }
5211 else
5212 {
5213 if (!doneone)
5214 {
5215 /* If this is the first .plt entry, make room
5216 for the special first entry. */
5217 if (s->size == 0)
5218 s->size += htab->plt_initial_entry_size;
5219
5220 /* The PowerPC PLT is actually composed of two
5221 parts, the first part is 2 words (for a load
5222 and a jump), and then there is a remaining
5223 word available at the end. */
5224 plt_offset = (htab->plt_initial_entry_size
5225 + (htab->plt_slot_size
5226 * ((s->size
5227 - htab->plt_initial_entry_size)
5228 / htab->plt_entry_size)));
5229
5230 /* If this symbol is not defined in a regular
5231 file, and we are not generating a shared
5232 library, then set the symbol to this location
5233 in the .plt. This is to avoid text
5234 relocations, and is required to make
5235 function pointers compare as equal between
5236 the normal executable and the shared library. */
5237 if (! info->shared
5238 && h->def_dynamic
5239 && !h->def_regular)
5240 {
5241 h->root.u.def.section = s;
5242 h->root.u.def.value = plt_offset;
5243 }
5244
5245 /* Make room for this entry. */
5246 s->size += htab->plt_entry_size;
5247 /* After the 8192nd entry, room for two entries
5248 is allocated. */
5249 if (htab->plt_type == PLT_OLD
5250 && (s->size - htab->plt_initial_entry_size)
5251 / htab->plt_entry_size
5252 > PLT_NUM_SINGLE_ENTRIES)
5253 s->size += htab->plt_entry_size;
5254 }
5255 ent->plt.offset = plt_offset;
5256 }
5257
5258 /* We also need to make an entry in the .rela.plt section. */
5259 if (!doneone)
5260 {
5261 if (!htab->elf.dynamic_sections_created
5262 || h->dynindx == -1)
5263 htab->reliplt->size += sizeof (Elf32_External_Rela);
5264 else
5265 {
5266 htab->relplt->size += sizeof (Elf32_External_Rela);
5267
5268 if (htab->plt_type == PLT_VXWORKS)
5269 {
5270 /* Allocate space for the unloaded relocations. */
5271 if (!info->shared
5272 && htab->elf.dynamic_sections_created)
5273 {
5274 if (ent->plt.offset
5275 == (bfd_vma) htab->plt_initial_entry_size)
5276 {
5277 htab->srelplt2->size
5278 += (sizeof (Elf32_External_Rela)
5279 * VXWORKS_PLTRESOLVE_RELOCS);
5280 }
5281
5282 htab->srelplt2->size
5283 += (sizeof (Elf32_External_Rela)
5284 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5285 }
5286
5287 /* Every PLT entry has an associated GOT entry in
5288 .got.plt. */
5289 htab->sgotplt->size += 4;
5290 }
5291 }
5292 doneone = TRUE;
5293 }
5294 }
5295 else
5296 ent->plt.offset = (bfd_vma) -1;
5297 }
5298 else
5299 ent->plt.offset = (bfd_vma) -1;
5300
5301 if (!doneone)
5302 {
5303 h->plt.plist = NULL;
5304 h->needs_plt = 0;
5305 }
5306 }
5307 else
5308 {
5309 h->plt.plist = NULL;
5310 h->needs_plt = 0;
5311 }
5312
5313 eh = (struct ppc_elf_link_hash_entry *) h;
5314 if (eh->elf.got.refcount > 0)
5315 {
5316 bfd_boolean dyn;
5317 unsigned int need;
5318
5319 /* Make sure this symbol is output as a dynamic symbol. */
5320 if (eh->elf.dynindx == -1
5321 && !eh->elf.forced_local
5322 && eh->elf.type != STT_GNU_IFUNC
5323 && htab->elf.dynamic_sections_created)
5324 {
5325 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5326 return FALSE;
5327 }
5328
5329 need = 0;
5330 if ((eh->tls_mask & TLS_TLS) != 0)
5331 {
5332 if ((eh->tls_mask & TLS_LD) != 0)
5333 {
5334 if (!eh->elf.def_dynamic)
5335 /* We'll just use htab->tlsld_got.offset. This should
5336 always be the case. It's a little odd if we have
5337 a local dynamic reloc against a non-local symbol. */
5338 htab->tlsld_got.refcount += 1;
5339 else
5340 need += 8;
5341 }
5342 if ((eh->tls_mask & TLS_GD) != 0)
5343 need += 8;
5344 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5345 need += 4;
5346 if ((eh->tls_mask & TLS_DTPREL) != 0)
5347 need += 4;
5348 }
5349 else
5350 need += 4;
5351 if (need == 0)
5352 eh->elf.got.offset = (bfd_vma) -1;
5353 else
5354 {
5355 eh->elf.got.offset = allocate_got (htab, need);
5356 dyn = htab->elf.dynamic_sections_created;
5357 if ((info->shared
5358 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5359 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5360 || eh->elf.root.type != bfd_link_hash_undefweak))
5361 {
5362 asection *rsec = htab->relgot;
5363 /* All the entries we allocated need relocs.
5364 Except LD only needs one. */
5365 if ((eh->tls_mask & TLS_LD) != 0
5366 && eh->elf.def_dynamic)
5367 need -= 4;
5368 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5369 }
5370 }
5371 }
5372 else
5373 eh->elf.got.offset = (bfd_vma) -1;
5374
5375 if (eh->dyn_relocs == NULL
5376 || !htab->elf.dynamic_sections_created)
5377 return TRUE;
5378
5379 /* In the shared -Bsymbolic case, discard space allocated for
5380 dynamic pc-relative relocs against symbols which turn out to be
5381 defined in regular objects. For the normal shared case, discard
5382 space for relocs that have become local due to symbol visibility
5383 changes. */
5384
5385 if (info->shared)
5386 {
5387 /* Relocs that use pc_count are those that appear on a call insn,
5388 or certain REL relocs (see must_be_dyn_reloc) that can be
5389 generated via assembly. We want calls to protected symbols to
5390 resolve directly to the function rather than going via the plt.
5391 If people want function pointer comparisons to work as expected
5392 then they should avoid writing weird assembly. */
5393 if (SYMBOL_CALLS_LOCAL (info, h))
5394 {
5395 struct ppc_elf_dyn_relocs **pp;
5396
5397 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5398 {
5399 p->count -= p->pc_count;
5400 p->pc_count = 0;
5401 if (p->count == 0)
5402 *pp = p->next;
5403 else
5404 pp = &p->next;
5405 }
5406 }
5407
5408 if (htab->is_vxworks)
5409 {
5410 struct ppc_elf_dyn_relocs **pp;
5411
5412 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5413 {
5414 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5415 *pp = p->next;
5416 else
5417 pp = &p->next;
5418 }
5419 }
5420
5421 /* Discard relocs on undefined symbols that must be local. */
5422 if (eh->dyn_relocs != NULL
5423 && h->root.type == bfd_link_hash_undefined
5424 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5425 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5426 eh->dyn_relocs = NULL;
5427
5428 /* Also discard relocs on undefined weak syms with non-default
5429 visibility. */
5430 if (eh->dyn_relocs != NULL
5431 && h->root.type == bfd_link_hash_undefweak)
5432 {
5433 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5434 eh->dyn_relocs = NULL;
5435
5436 /* Make sure undefined weak symbols are output as a dynamic
5437 symbol in PIEs. */
5438 else if (h->dynindx == -1
5439 && !h->forced_local
5440 && !h->def_regular)
5441 {
5442 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5443 return FALSE;
5444 }
5445 }
5446 }
5447 else if (ELIMINATE_COPY_RELOCS)
5448 {
5449 /* For the non-shared case, discard space for relocs against
5450 symbols which turn out to need copy relocs or are not
5451 dynamic. */
5452
5453 if (!h->non_got_ref
5454 && !h->def_regular)
5455 {
5456 /* Make sure this symbol is output as a dynamic symbol.
5457 Undefined weak syms won't yet be marked as dynamic. */
5458 if (h->dynindx == -1
5459 && !h->forced_local)
5460 {
5461 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5462 return FALSE;
5463 }
5464
5465 /* If that succeeded, we know we'll be keeping all the
5466 relocs. */
5467 if (h->dynindx != -1)
5468 goto keep;
5469 }
5470
5471 eh->dyn_relocs = NULL;
5472
5473 keep: ;
5474 }
5475
5476 /* Finally, allocate space. */
5477 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5478 {
5479 asection *sreloc = elf_section_data (p->sec)->sreloc;
5480 if (!htab->elf.dynamic_sections_created)
5481 sreloc = htab->reliplt;
5482 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5483 }
5484
5485 return TRUE;
5486 }
5487
5488 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5489 read-only sections. */
5490
5491 static bfd_boolean
5492 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5493 {
5494 if (h->root.type == bfd_link_hash_indirect)
5495 return TRUE;
5496
5497 if (h->root.type == bfd_link_hash_warning)
5498 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5499
5500 if (readonly_dynrelocs (h))
5501 {
5502 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5503
5504 /* Not an error, just cut short the traversal. */
5505 return FALSE;
5506 }
5507 return TRUE;
5508 }
5509
5510 /* Set the sizes of the dynamic sections. */
5511
5512 static bfd_boolean
5513 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5514 struct bfd_link_info *info)
5515 {
5516 struct ppc_elf_link_hash_table *htab;
5517 asection *s;
5518 bfd_boolean relocs;
5519 bfd *ibfd;
5520
5521 #ifdef DEBUG
5522 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5523 #endif
5524
5525 htab = ppc_elf_hash_table (info);
5526 BFD_ASSERT (htab->elf.dynobj != NULL);
5527
5528 if (elf_hash_table (info)->dynamic_sections_created)
5529 {
5530 /* Set the contents of the .interp section to the interpreter. */
5531 if (info->executable)
5532 {
5533 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5534 BFD_ASSERT (s != NULL);
5535 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5536 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5537 }
5538 }
5539
5540 if (htab->plt_type == PLT_OLD)
5541 htab->got_header_size = 16;
5542 else if (htab->plt_type == PLT_NEW)
5543 htab->got_header_size = 12;
5544
5545 /* Set up .got offsets for local syms, and space for local dynamic
5546 relocs. */
5547 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5548 {
5549 bfd_signed_vma *local_got;
5550 bfd_signed_vma *end_local_got;
5551 struct plt_entry **local_plt;
5552 struct plt_entry **end_local_plt;
5553 char *lgot_masks;
5554 bfd_size_type locsymcount;
5555 Elf_Internal_Shdr *symtab_hdr;
5556
5557 if (!is_ppc_elf (ibfd))
5558 continue;
5559
5560 for (s = ibfd->sections; s != NULL; s = s->next)
5561 {
5562 struct ppc_elf_dyn_relocs *p;
5563
5564 for (p = ((struct ppc_elf_dyn_relocs *)
5565 elf_section_data (s)->local_dynrel);
5566 p != NULL;
5567 p = p->next)
5568 {
5569 if (!bfd_is_abs_section (p->sec)
5570 && bfd_is_abs_section (p->sec->output_section))
5571 {
5572 /* Input section has been discarded, either because
5573 it is a copy of a linkonce section or due to
5574 linker script /DISCARD/, so we'll be discarding
5575 the relocs too. */
5576 }
5577 else if (htab->is_vxworks
5578 && strcmp (p->sec->output_section->name,
5579 ".tls_vars") == 0)
5580 {
5581 /* Relocations in vxworks .tls_vars sections are
5582 handled specially by the loader. */
5583 }
5584 else if (p->count != 0)
5585 {
5586 asection *sreloc = elf_section_data (p->sec)->sreloc;
5587 if (!htab->elf.dynamic_sections_created)
5588 sreloc = htab->reliplt;
5589 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5590 if ((p->sec->output_section->flags
5591 & (SEC_READONLY | SEC_ALLOC))
5592 == (SEC_READONLY | SEC_ALLOC))
5593 info->flags |= DF_TEXTREL;
5594 }
5595 }
5596 }
5597
5598 local_got = elf_local_got_refcounts (ibfd);
5599 if (!local_got)
5600 continue;
5601
5602 symtab_hdr = &elf_symtab_hdr (ibfd);
5603 locsymcount = symtab_hdr->sh_info;
5604 end_local_got = local_got + locsymcount;
5605 local_plt = (struct plt_entry **) end_local_got;
5606 end_local_plt = local_plt + locsymcount;
5607 lgot_masks = (char *) end_local_plt;
5608
5609 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5610 if (*local_got > 0)
5611 {
5612 unsigned int need = 0;
5613 if ((*lgot_masks & TLS_TLS) != 0)
5614 {
5615 if ((*lgot_masks & TLS_GD) != 0)
5616 need += 8;
5617 if ((*lgot_masks & TLS_LD) != 0)
5618 htab->tlsld_got.refcount += 1;
5619 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5620 need += 4;
5621 if ((*lgot_masks & TLS_DTPREL) != 0)
5622 need += 4;
5623 }
5624 else
5625 need += 4;
5626 if (need == 0)
5627 *local_got = (bfd_vma) -1;
5628 else
5629 {
5630 *local_got = allocate_got (htab, need);
5631 if (info->shared)
5632 htab->relgot->size += (need
5633 * (sizeof (Elf32_External_Rela) / 4));
5634 }
5635 }
5636 else
5637 *local_got = (bfd_vma) -1;
5638
5639 if (htab->is_vxworks)
5640 continue;
5641
5642 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5643 for (; local_plt < end_local_plt; ++local_plt)
5644 {
5645 struct plt_entry *ent;
5646 bfd_boolean doneone = FALSE;
5647 bfd_vma plt_offset = 0, glink_offset = 0;
5648
5649 for (ent = *local_plt; ent != NULL; ent = ent->next)
5650 if (ent->plt.refcount > 0)
5651 {
5652 s = htab->iplt;
5653
5654 if (!doneone)
5655 {
5656 plt_offset = s->size;
5657 s->size += 4;
5658 }
5659 ent->plt.offset = plt_offset;
5660
5661 s = htab->glink;
5662 if (!doneone || info->shared)
5663 {
5664 glink_offset = s->size;
5665 s->size += GLINK_ENTRY_SIZE;
5666 }
5667 ent->glink_offset = glink_offset;
5668
5669 if (!doneone)
5670 {
5671 htab->reliplt->size += sizeof (Elf32_External_Rela);
5672 doneone = TRUE;
5673 }
5674 }
5675 else
5676 ent->plt.offset = (bfd_vma) -1;
5677 }
5678 }
5679
5680 /* Allocate space for global sym dynamic relocs. */
5681 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5682
5683 if (htab->tlsld_got.refcount > 0)
5684 {
5685 htab->tlsld_got.offset = allocate_got (htab, 8);
5686 if (info->shared)
5687 htab->relgot->size += sizeof (Elf32_External_Rela);
5688 }
5689 else
5690 htab->tlsld_got.offset = (bfd_vma) -1;
5691
5692 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5693 {
5694 unsigned int g_o_t = 32768;
5695
5696 /* If we haven't allocated the header, do so now. When we get here,
5697 for old plt/got the got size will be 0 to 32764 (not allocated),
5698 or 32780 to 65536 (header allocated). For new plt/got, the
5699 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5700 if (htab->got->size <= 32768)
5701 {
5702 g_o_t = htab->got->size;
5703 if (htab->plt_type == PLT_OLD)
5704 g_o_t += 4;
5705 htab->got->size += htab->got_header_size;
5706 }
5707
5708 htab->elf.hgot->root.u.def.value = g_o_t;
5709 }
5710 if (info->shared)
5711 {
5712 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5713 if (sda != NULL
5714 && !(sda->root.type == bfd_link_hash_defined
5715 || sda->root.type == bfd_link_hash_defweak))
5716 {
5717 sda->root.type = bfd_link_hash_defined;
5718 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5719 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5720 }
5721 }
5722
5723 if (htab->glink != NULL
5724 && htab->glink->size != 0
5725 && htab->elf.dynamic_sections_created)
5726 {
5727 htab->glink_pltresolve = htab->glink->size;
5728 /* Space for the branch table. */
5729 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5730 /* Pad out to align the start of PLTresolve. */
5731 htab->glink->size += -htab->glink->size & 15;
5732 htab->glink->size += GLINK_PLTRESOLVE;
5733
5734 if (htab->emit_stub_syms)
5735 {
5736 struct elf_link_hash_entry *sh;
5737 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5738 TRUE, FALSE, FALSE);
5739 if (sh == NULL)
5740 return FALSE;
5741 if (sh->root.type == bfd_link_hash_new)
5742 {
5743 sh->root.type = bfd_link_hash_defined;
5744 sh->root.u.def.section = htab->glink;
5745 sh->root.u.def.value = htab->glink_pltresolve;
5746 sh->ref_regular = 1;
5747 sh->def_regular = 1;
5748 sh->ref_regular_nonweak = 1;
5749 sh->forced_local = 1;
5750 sh->non_elf = 0;
5751 }
5752 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5753 TRUE, FALSE, FALSE);
5754 if (sh == NULL)
5755 return FALSE;
5756 if (sh->root.type == bfd_link_hash_new)
5757 {
5758 sh->root.type = bfd_link_hash_defined;
5759 sh->root.u.def.section = htab->glink;
5760 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5761 sh->ref_regular = 1;
5762 sh->def_regular = 1;
5763 sh->ref_regular_nonweak = 1;
5764 sh->forced_local = 1;
5765 sh->non_elf = 0;
5766 }
5767 }
5768 }
5769
5770 /* We've now determined the sizes of the various dynamic sections.
5771 Allocate memory for them. */
5772 relocs = FALSE;
5773 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5774 {
5775 bfd_boolean strip_section = TRUE;
5776
5777 if ((s->flags & SEC_LINKER_CREATED) == 0)
5778 continue;
5779
5780 if (s == htab->plt
5781 || s == htab->got)
5782 {
5783 /* We'd like to strip these sections if they aren't needed, but if
5784 we've exported dynamic symbols from them we must leave them.
5785 It's too late to tell BFD to get rid of the symbols. */
5786 if (htab->elf.hplt != NULL)
5787 strip_section = FALSE;
5788 /* Strip this section if we don't need it; see the
5789 comment below. */
5790 }
5791 else if (s == htab->iplt
5792 || s == htab->glink
5793 || s == htab->sgotplt
5794 || s == htab->sbss
5795 || s == htab->dynbss
5796 || s == htab->dynsbss
5797 || s == htab->sdata[0].section
5798 || s == htab->sdata[1].section)
5799 {
5800 /* Strip these too. */
5801 }
5802 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5803 {
5804 if (s->size != 0)
5805 {
5806 /* Remember whether there are any relocation sections. */
5807 relocs = TRUE;
5808
5809 /* We use the reloc_count field as a counter if we need
5810 to copy relocs into the output file. */
5811 s->reloc_count = 0;
5812 }
5813 }
5814 else
5815 {
5816 /* It's not one of our sections, so don't allocate space. */
5817 continue;
5818 }
5819
5820 if (s->size == 0 && strip_section)
5821 {
5822 /* If we don't need this section, strip it from the
5823 output file. This is mostly to handle .rela.bss and
5824 .rela.plt. We must create both sections in
5825 create_dynamic_sections, because they must be created
5826 before the linker maps input sections to output
5827 sections. The linker does that before
5828 adjust_dynamic_symbol is called, and it is that
5829 function which decides whether anything needs to go
5830 into these sections. */
5831 s->flags |= SEC_EXCLUDE;
5832 continue;
5833 }
5834
5835 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5836 continue;
5837
5838 /* Allocate memory for the section contents. */
5839 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5840 if (s->contents == NULL)
5841 return FALSE;
5842 }
5843
5844 if (htab->elf.dynamic_sections_created)
5845 {
5846 /* Add some entries to the .dynamic section. We fill in the
5847 values later, in ppc_elf_finish_dynamic_sections, but we
5848 must add the entries now so that we get the correct size for
5849 the .dynamic section. The DT_DEBUG entry is filled in by the
5850 dynamic linker and used by the debugger. */
5851 #define add_dynamic_entry(TAG, VAL) \
5852 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5853
5854 if (info->executable)
5855 {
5856 if (!add_dynamic_entry (DT_DEBUG, 0))
5857 return FALSE;
5858 }
5859
5860 if (htab->plt != NULL && htab->plt->size != 0)
5861 {
5862 if (!add_dynamic_entry (DT_PLTGOT, 0)
5863 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5864 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5865 || !add_dynamic_entry (DT_JMPREL, 0))
5866 return FALSE;
5867 }
5868
5869 if (htab->glink != NULL && htab->glink->size != 0)
5870 {
5871 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5872 return FALSE;
5873 if (!htab->no_tls_get_addr_opt
5874 && htab->tls_get_addr != NULL
5875 && htab->tls_get_addr->plt.plist != NULL
5876 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5877 return FALSE;
5878 }
5879
5880 if (relocs)
5881 {
5882 if (!add_dynamic_entry (DT_RELA, 0)
5883 || !add_dynamic_entry (DT_RELASZ, 0)
5884 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5885 return FALSE;
5886 }
5887
5888 /* If any dynamic relocs apply to a read-only section, then we
5889 need a DT_TEXTREL entry. */
5890 if ((info->flags & DF_TEXTREL) == 0)
5891 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5892 info);
5893
5894 if ((info->flags & DF_TEXTREL) != 0)
5895 {
5896 if (!add_dynamic_entry (DT_TEXTREL, 0))
5897 return FALSE;
5898 }
5899 if (htab->is_vxworks
5900 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5901 return FALSE;
5902 }
5903 #undef add_dynamic_entry
5904
5905 return TRUE;
5906 }
5907
5908 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5909
5910 static bfd_boolean
5911 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5912 {
5913 if (h->plt.plist != NULL
5914 && !h->def_regular
5915 && (!h->pointer_equality_needed
5916 || !h->ref_regular_nonweak))
5917 return FALSE;
5918
5919 return _bfd_elf_hash_symbol (h);
5920 }
5921 \f
5922 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5923
5924 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5925 used for some functions that are allowed to break the ABI). */
5926 static const int shared_stub_entry[] =
5927 {
5928 0x7c0802a6, /* mflr 0 */
5929 0x429f0005, /* bcl 20, 31, .Lxxx */
5930 0x7d8802a6, /* mflr 12 */
5931 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5932 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5933 0x7c0803a6, /* mtlr 0 */
5934 0x7d8903a6, /* mtctr 12 */
5935 0x4e800420, /* bctr */
5936 };
5937
5938 static const int stub_entry[] =
5939 {
5940 0x3d800000, /* lis 12,xxx@ha */
5941 0x398c0000, /* addi 12,12,xxx@l */
5942 0x7d8903a6, /* mtctr 12 */
5943 0x4e800420, /* bctr */
5944 };
5945
5946 static bfd_boolean
5947 ppc_elf_relax_section (bfd *abfd,
5948 asection *isec,
5949 struct bfd_link_info *link_info,
5950 bfd_boolean *again)
5951 {
5952 struct one_fixup
5953 {
5954 struct one_fixup *next;
5955 asection *tsec;
5956 /* Final link, can use the symbol offset. For a
5957 relocatable link we use the symbol's index. */
5958 bfd_vma toff;
5959 bfd_vma trampoff;
5960 };
5961
5962 Elf_Internal_Shdr *symtab_hdr;
5963 bfd_byte *contents = NULL;
5964 Elf_Internal_Sym *isymbuf = NULL;
5965 Elf_Internal_Rela *internal_relocs = NULL;
5966 Elf_Internal_Rela *irel, *irelend;
5967 struct one_fixup *fixups = NULL;
5968 unsigned changes = 0;
5969 struct ppc_elf_link_hash_table *htab;
5970 bfd_size_type trampoff;
5971 asection *got2;
5972
5973 *again = FALSE;
5974
5975 /* Nothing to do if there are no relocations, and no need to do
5976 anything with non-alloc or non-code sections. */
5977 if ((isec->flags & SEC_ALLOC) == 0
5978 || (isec->flags & SEC_CODE) == 0
5979 || (isec->flags & SEC_RELOC) == 0
5980 || isec->reloc_count == 0)
5981 return TRUE;
5982
5983 /* We cannot represent the required PIC relocs in the output, so don't
5984 do anything. The linker doesn't support mixing -shared and -r
5985 anyway. */
5986 if (link_info->relocatable && link_info->shared)
5987 return TRUE;
5988
5989 trampoff = (isec->size + 3) & (bfd_vma) -4;
5990 /* Space for a branch around any trampolines. */
5991 trampoff += 4;
5992
5993 symtab_hdr = &elf_symtab_hdr (abfd);
5994
5995 /* Get a copy of the native relocations. */
5996 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5997 link_info->keep_memory);
5998 if (internal_relocs == NULL)
5999 goto error_return;
6000
6001 htab = ppc_elf_hash_table (link_info);
6002 got2 = bfd_get_section_by_name (abfd, ".got2");
6003
6004 irelend = internal_relocs + isec->reloc_count;
6005 for (irel = internal_relocs; irel < irelend; irel++)
6006 {
6007 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6008 bfd_vma toff, roff;
6009 asection *tsec;
6010 struct one_fixup *f;
6011 size_t insn_offset = 0;
6012 bfd_vma max_branch_offset, val;
6013 bfd_byte *hit_addr;
6014 unsigned long t0;
6015 struct elf_link_hash_entry *h;
6016 struct plt_entry **plist;
6017 unsigned char sym_type;
6018
6019 switch (r_type)
6020 {
6021 case R_PPC_REL24:
6022 case R_PPC_LOCAL24PC:
6023 case R_PPC_PLTREL24:
6024 max_branch_offset = 1 << 25;
6025 break;
6026
6027 case R_PPC_REL14:
6028 case R_PPC_REL14_BRTAKEN:
6029 case R_PPC_REL14_BRNTAKEN:
6030 max_branch_offset = 1 << 15;
6031 break;
6032
6033 default:
6034 continue;
6035 }
6036
6037 /* Get the value of the symbol referred to by the reloc. */
6038 h = NULL;
6039 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6040 {
6041 /* A local symbol. */
6042 Elf_Internal_Sym *isym;
6043
6044 /* Read this BFD's local symbols. */
6045 if (isymbuf == NULL)
6046 {
6047 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6048 if (isymbuf == NULL)
6049 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6050 symtab_hdr->sh_info, 0,
6051 NULL, NULL, NULL);
6052 if (isymbuf == 0)
6053 goto error_return;
6054 }
6055 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6056 if (isym->st_shndx == SHN_UNDEF)
6057 tsec = bfd_und_section_ptr;
6058 else if (isym->st_shndx == SHN_ABS)
6059 tsec = bfd_abs_section_ptr;
6060 else if (isym->st_shndx == SHN_COMMON)
6061 tsec = bfd_com_section_ptr;
6062 else
6063 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6064
6065 toff = isym->st_value;
6066 sym_type = ELF_ST_TYPE (isym->st_info);
6067 }
6068 else
6069 {
6070 /* Global symbol handling. */
6071 unsigned long indx;
6072
6073 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6074 h = elf_sym_hashes (abfd)[indx];
6075
6076 while (h->root.type == bfd_link_hash_indirect
6077 || h->root.type == bfd_link_hash_warning)
6078 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6079
6080 if (h->root.type == bfd_link_hash_defined
6081 || h->root.type == bfd_link_hash_defweak)
6082 {
6083 tsec = h->root.u.def.section;
6084 toff = h->root.u.def.value;
6085 }
6086 else if (h->root.type == bfd_link_hash_undefined
6087 || h->root.type == bfd_link_hash_undefweak)
6088 {
6089 tsec = bfd_und_section_ptr;
6090 toff = link_info->relocatable ? indx : 0;
6091 }
6092 else
6093 continue;
6094
6095 sym_type = h->type;
6096 }
6097
6098 /* The condition here under which we call find_plt_ent must
6099 match that in relocate_section. If we call find_plt_ent here
6100 but not in relocate_section, or vice versa, then the branch
6101 destination used here may be incorrect. */
6102 plist = NULL;
6103 if (h != NULL)
6104 {
6105 /* We know is_branch_reloc (r_type) is true. */
6106 if (h->type == STT_GNU_IFUNC
6107 || r_type == R_PPC_PLTREL24)
6108 plist = &h->plt.plist;
6109 }
6110 else if (sym_type == STT_GNU_IFUNC
6111 && elf_local_got_offsets (abfd) != NULL)
6112 {
6113 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6114 struct plt_entry **local_plt = (struct plt_entry **)
6115 (local_got_offsets + symtab_hdr->sh_info);
6116 plist = local_plt + ELF32_R_SYM (irel->r_info);
6117 }
6118 if (plist != NULL)
6119 {
6120 bfd_vma addend = 0;
6121 struct plt_entry *ent;
6122
6123 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6124 addend = irel->r_addend;
6125 ent = find_plt_ent (plist, got2, addend);
6126 if (ent != NULL)
6127 {
6128 if (htab->plt_type == PLT_NEW
6129 || h == NULL
6130 || !htab->elf.dynamic_sections_created
6131 || h->dynindx == -1)
6132 {
6133 tsec = htab->glink;
6134 toff = ent->glink_offset;
6135 }
6136 else
6137 {
6138 tsec = htab->plt;
6139 toff = ent->plt.offset;
6140 }
6141 }
6142 }
6143
6144 /* If the branch and target are in the same section, you have
6145 no hope of adding stubs. We'll error out later should the
6146 branch overflow. */
6147 if (tsec == isec)
6148 continue;
6149
6150 /* There probably isn't any reason to handle symbols in
6151 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6152 attribute for a code section, and we are only looking at
6153 branches. However, implement it correctly here as a
6154 reference for other target relax_section functions. */
6155 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6156 {
6157 /* At this stage in linking, no SEC_MERGE symbol has been
6158 adjusted, so all references to such symbols need to be
6159 passed through _bfd_merged_section_offset. (Later, in
6160 relocate_section, all SEC_MERGE symbols *except* for
6161 section symbols have been adjusted.)
6162
6163 gas may reduce relocations against symbols in SEC_MERGE
6164 sections to a relocation against the section symbol when
6165 the original addend was zero. When the reloc is against
6166 a section symbol we should include the addend in the
6167 offset passed to _bfd_merged_section_offset, since the
6168 location of interest is the original symbol. On the
6169 other hand, an access to "sym+addend" where "sym" is not
6170 a section symbol should not include the addend; Such an
6171 access is presumed to be an offset from "sym"; The
6172 location of interest is just "sym". */
6173 if (sym_type == STT_SECTION)
6174 toff += irel->r_addend;
6175
6176 toff = _bfd_merged_section_offset (abfd, &tsec,
6177 elf_section_data (tsec)->sec_info,
6178 toff);
6179
6180 if (sym_type != STT_SECTION)
6181 toff += irel->r_addend;
6182 }
6183 /* PLTREL24 addends are special. */
6184 else if (r_type != R_PPC_PLTREL24)
6185 toff += irel->r_addend;
6186
6187 /* Attempted -shared link of non-pic code loses. */
6188 if (tsec->output_section == NULL)
6189 continue;
6190
6191 roff = irel->r_offset;
6192
6193 /* If the branch is in range, no need to do anything. */
6194 if (tsec != bfd_und_section_ptr
6195 && (!link_info->relocatable
6196 /* A relocatable link may have sections moved during
6197 final link, so do not presume they remain in range. */
6198 || tsec->output_section == isec->output_section))
6199 {
6200 bfd_vma symaddr, reladdr;
6201
6202 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6203 reladdr = isec->output_section->vma + isec->output_offset + roff;
6204 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6205 continue;
6206 }
6207
6208 /* Look for an existing fixup to this address. */
6209 for (f = fixups; f ; f = f->next)
6210 if (f->tsec == tsec && f->toff == toff)
6211 break;
6212
6213 if (f == NULL)
6214 {
6215 size_t size;
6216 unsigned long stub_rtype;
6217
6218 val = trampoff - roff;
6219 if (val >= max_branch_offset)
6220 /* Oh dear, we can't reach a trampoline. Don't try to add
6221 one. We'll report an error later. */
6222 continue;
6223
6224 if (link_info->shared)
6225 {
6226 size = 4 * ARRAY_SIZE (shared_stub_entry);
6227 insn_offset = 12;
6228 }
6229 else
6230 {
6231 size = 4 * ARRAY_SIZE (stub_entry);
6232 insn_offset = 0;
6233 }
6234 stub_rtype = R_PPC_RELAX;
6235 if (tsec == htab->plt
6236 || tsec == htab->glink)
6237 {
6238 stub_rtype = R_PPC_RELAX_PLT;
6239 if (r_type == R_PPC_PLTREL24)
6240 stub_rtype = R_PPC_RELAX_PLTREL24;
6241 }
6242
6243 /* Hijack the old relocation. Since we need two
6244 relocations for this use a "composite" reloc. */
6245 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6246 stub_rtype);
6247 irel->r_offset = trampoff + insn_offset;
6248 if (r_type == R_PPC_PLTREL24
6249 && stub_rtype != R_PPC_RELAX_PLTREL24)
6250 irel->r_addend = 0;
6251
6252 /* Record the fixup so we don't do it again this section. */
6253 f = bfd_malloc (sizeof (*f));
6254 f->next = fixups;
6255 f->tsec = tsec;
6256 f->toff = toff;
6257 f->trampoff = trampoff;
6258 fixups = f;
6259
6260 trampoff += size;
6261 changes++;
6262 }
6263 else
6264 {
6265 val = f->trampoff - roff;
6266 if (val >= max_branch_offset)
6267 continue;
6268
6269 /* Nop out the reloc, since we're finalizing things here. */
6270 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6271 }
6272
6273 /* Get the section contents. */
6274 if (contents == NULL)
6275 {
6276 /* Get cached copy if it exists. */
6277 if (elf_section_data (isec)->this_hdr.contents != NULL)
6278 contents = elf_section_data (isec)->this_hdr.contents;
6279 else
6280 {
6281 /* Go get them off disk. */
6282 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6283 goto error_return;
6284 }
6285 }
6286
6287 /* Fix up the existing branch to hit the trampoline. */
6288 hit_addr = contents + roff;
6289 switch (r_type)
6290 {
6291 case R_PPC_REL24:
6292 case R_PPC_LOCAL24PC:
6293 case R_PPC_PLTREL24:
6294 t0 = bfd_get_32 (abfd, hit_addr);
6295 t0 &= ~0x3fffffc;
6296 t0 |= val & 0x3fffffc;
6297 bfd_put_32 (abfd, t0, hit_addr);
6298 break;
6299
6300 case R_PPC_REL14:
6301 case R_PPC_REL14_BRTAKEN:
6302 case R_PPC_REL14_BRNTAKEN:
6303 t0 = bfd_get_32 (abfd, hit_addr);
6304 t0 &= ~0xfffc;
6305 t0 |= val & 0xfffc;
6306 bfd_put_32 (abfd, t0, hit_addr);
6307 break;
6308 }
6309 }
6310
6311 /* Write out the trampolines. */
6312 if (fixups != NULL)
6313 {
6314 const int *stub;
6315 bfd_byte *dest;
6316 bfd_vma val;
6317 int i, size;
6318
6319 do
6320 {
6321 struct one_fixup *f = fixups;
6322 fixups = fixups->next;
6323 free (f);
6324 }
6325 while (fixups);
6326
6327 contents = bfd_realloc_or_free (contents, trampoff);
6328 if (contents == NULL)
6329 goto error_return;
6330
6331 isec->size = (isec->size + 3) & (bfd_vma) -4;
6332 /* Branch around the trampolines. */
6333 val = B + trampoff - isec->size;
6334 dest = contents + isec->size;
6335 isec->size = trampoff;
6336 bfd_put_32 (abfd, val, dest);
6337 dest += 4;
6338
6339 if (link_info->shared)
6340 {
6341 stub = shared_stub_entry;
6342 size = ARRAY_SIZE (shared_stub_entry);
6343 }
6344 else
6345 {
6346 stub = stub_entry;
6347 size = ARRAY_SIZE (stub_entry);
6348 }
6349
6350 i = 0;
6351 while (dest < contents + trampoff)
6352 {
6353 bfd_put_32 (abfd, stub[i], dest);
6354 i++;
6355 if (i == size)
6356 i = 0;
6357 dest += 4;
6358 }
6359 BFD_ASSERT (i == 0);
6360 }
6361
6362 if (isymbuf != NULL
6363 && symtab_hdr->contents != (unsigned char *) isymbuf)
6364 {
6365 if (! link_info->keep_memory)
6366 free (isymbuf);
6367 else
6368 {
6369 /* Cache the symbols for elf_link_input_bfd. */
6370 symtab_hdr->contents = (unsigned char *) isymbuf;
6371 }
6372 }
6373
6374 if (contents != NULL
6375 && elf_section_data (isec)->this_hdr.contents != contents)
6376 {
6377 if (!changes && !link_info->keep_memory)
6378 free (contents);
6379 else
6380 {
6381 /* Cache the section contents for elf_link_input_bfd. */
6382 elf_section_data (isec)->this_hdr.contents = contents;
6383 }
6384 }
6385
6386 if (changes != 0)
6387 {
6388 /* Append sufficient NOP relocs so we can write out relocation
6389 information for the trampolines. */
6390 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6391 * sizeof (*new_relocs));
6392 unsigned ix;
6393
6394 if (!new_relocs)
6395 goto error_return;
6396 memcpy (new_relocs, internal_relocs,
6397 isec->reloc_count * sizeof (*new_relocs));
6398 for (ix = changes; ix--;)
6399 {
6400 irel = new_relocs + ix + isec->reloc_count;
6401
6402 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6403 }
6404 if (internal_relocs != elf_section_data (isec)->relocs)
6405 free (internal_relocs);
6406 elf_section_data (isec)->relocs = new_relocs;
6407 isec->reloc_count += changes;
6408 elf_section_data (isec)->rel_hdr.sh_size
6409 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6410 }
6411 else if (elf_section_data (isec)->relocs != internal_relocs)
6412 free (internal_relocs);
6413
6414 *again = changes != 0;
6415 if (!*again && link_info->relocatable)
6416 {
6417 /* Convert the internal relax relocs to external form. */
6418 for (irel = internal_relocs; irel < irelend; irel++)
6419 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6420 {
6421 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6422
6423 /* Rewrite the reloc and convert one of the trailing nop
6424 relocs to describe this relocation. */
6425 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6426 /* The relocs are at the bottom 2 bytes */
6427 irel[0].r_offset += 2;
6428 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6429 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6430 irel[1].r_offset += 4;
6431 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6432 irel++;
6433 }
6434 }
6435
6436 return TRUE;
6437
6438 error_return:
6439 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6440 free (isymbuf);
6441 if (contents != NULL
6442 && elf_section_data (isec)->this_hdr.contents != contents)
6443 free (contents);
6444 if (internal_relocs != NULL
6445 && elf_section_data (isec)->relocs != internal_relocs)
6446 free (internal_relocs);
6447 return FALSE;
6448 }
6449 \f
6450 /* What to do when ld finds relocations against symbols defined in
6451 discarded sections. */
6452
6453 static unsigned int
6454 ppc_elf_action_discarded (asection *sec)
6455 {
6456 if (strcmp (".fixup", sec->name) == 0)
6457 return 0;
6458
6459 if (strcmp (".got2", sec->name) == 0)
6460 return 0;
6461
6462 return _bfd_elf_default_action_discarded (sec);
6463 }
6464 \f
6465 /* Fill in the address for a pointer generated in a linker section. */
6466
6467 static bfd_vma
6468 elf_finish_pointer_linker_section (bfd *input_bfd,
6469 elf_linker_section_t *lsect,
6470 struct elf_link_hash_entry *h,
6471 bfd_vma relocation,
6472 const Elf_Internal_Rela *rel)
6473 {
6474 elf_linker_section_pointers_t *linker_section_ptr;
6475
6476 BFD_ASSERT (lsect != NULL);
6477
6478 if (h != NULL)
6479 {
6480 /* Handle global symbol. */
6481 struct ppc_elf_link_hash_entry *eh;
6482
6483 eh = (struct ppc_elf_link_hash_entry *) h;
6484 BFD_ASSERT (eh->elf.def_regular);
6485 linker_section_ptr = eh->linker_section_pointer;
6486 }
6487 else
6488 {
6489 /* Handle local symbol. */
6490 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6491
6492 BFD_ASSERT (is_ppc_elf (input_bfd));
6493 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6494 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6495 }
6496
6497 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6498 rel->r_addend,
6499 lsect);
6500 BFD_ASSERT (linker_section_ptr != NULL);
6501
6502 /* Offset will always be a multiple of four, so use the bottom bit
6503 as a "written" flag. */
6504 if ((linker_section_ptr->offset & 1) == 0)
6505 {
6506 bfd_put_32 (lsect->section->owner,
6507 relocation + linker_section_ptr->addend,
6508 lsect->section->contents + linker_section_ptr->offset);
6509 linker_section_ptr->offset += 1;
6510 }
6511
6512 relocation = (lsect->section->output_section->vma
6513 + lsect->section->output_offset
6514 + linker_section_ptr->offset - 1
6515 - SYM_VAL (lsect->sym));
6516
6517 #ifdef DEBUG
6518 fprintf (stderr,
6519 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6520 lsect->name, (long) relocation, (long) relocation);
6521 #endif
6522
6523 return relocation;
6524 }
6525
6526 #define PPC_LO(v) ((v) & 0xffff)
6527 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6528 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6529
6530 static void
6531 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6532 struct bfd_link_info *info)
6533 {
6534 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6535 bfd *output_bfd = info->output_bfd;
6536 bfd_vma plt;
6537
6538 plt = ((ent->plt.offset & ~1)
6539 + plt_sec->output_section->vma
6540 + plt_sec->output_offset);
6541
6542 if (info->shared)
6543 {
6544 bfd_vma got = 0;
6545
6546 if (ent->addend >= 32768)
6547 got = (ent->addend
6548 + ent->sec->output_section->vma
6549 + ent->sec->output_offset);
6550 else if (htab->elf.hgot != NULL)
6551 got = SYM_VAL (htab->elf.hgot);
6552
6553 plt -= got;
6554
6555 if (plt + 0x8000 < 0x10000)
6556 {
6557 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6558 p += 4;
6559 bfd_put_32 (output_bfd, MTCTR_11, p);
6560 p += 4;
6561 bfd_put_32 (output_bfd, BCTR, p);
6562 p += 4;
6563 bfd_put_32 (output_bfd, NOP, p);
6564 p += 4;
6565 }
6566 else
6567 {
6568 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6569 p += 4;
6570 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6571 p += 4;
6572 bfd_put_32 (output_bfd, MTCTR_11, p);
6573 p += 4;
6574 bfd_put_32 (output_bfd, BCTR, p);
6575 p += 4;
6576 }
6577 }
6578 else
6579 {
6580 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6581 p += 4;
6582 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6583 p += 4;
6584 bfd_put_32 (output_bfd, MTCTR_11, p);
6585 p += 4;
6586 bfd_put_32 (output_bfd, BCTR, p);
6587 p += 4;
6588 }
6589 }
6590
6591 /* Return true if symbol is defined statically. */
6592
6593 static bfd_boolean
6594 is_static_defined (struct elf_link_hash_entry *h)
6595 {
6596 return ((h->root.type == bfd_link_hash_defined
6597 || h->root.type == bfd_link_hash_defweak)
6598 && h->root.u.def.section != NULL
6599 && h->root.u.def.section->output_section != NULL);
6600 }
6601
6602 /* If INSN is an opcode that may be used with an @tls operand, return
6603 the transformed insn for TLS optimisation, otherwise return 0. If
6604 REG is non-zero only match an insn with RB or RA equal to REG. */
6605
6606 unsigned int
6607 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6608 {
6609 unsigned int rtra;
6610
6611 if ((insn & (0x3f << 26)) != 31 << 26)
6612 return 0;
6613
6614 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6615 rtra = insn & ((1 << 26) - (1 << 16));
6616 else if (((insn >> 16) & 0x1f) == reg)
6617 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6618 else
6619 return 0;
6620
6621 if ((insn & (0x3ff << 1)) == 266 << 1)
6622 /* add -> addi. */
6623 insn = 14 << 26;
6624 else if ((insn & (0x1f << 1)) == 23 << 1
6625 && ((insn & (0x1f << 6)) < 14 << 6
6626 || ((insn & (0x1f << 6)) >= 16 << 6
6627 && (insn & (0x1f << 6)) < 24 << 6)))
6628 /* load and store indexed -> dform. */
6629 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6630 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6631 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6632 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6633 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6634 /* lwax -> lwa. */
6635 insn = (58 << 26) | 2;
6636 else
6637 return 0;
6638 insn |= rtra;
6639 return insn;
6640 }
6641
6642 /* If INSN is an opcode that may be used with an @tprel operand, return
6643 the transformed insn for an undefined weak symbol, ie. with the
6644 thread pointer REG operand removed. Otherwise return 0. */
6645
6646 unsigned int
6647 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6648 {
6649 if ((insn & (0x1f << 16)) == reg << 16
6650 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6651 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6652 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6653 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6654 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6655 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6656 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6657 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6658 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6659 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6660 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6661 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6662 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6663 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6664 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6665 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6666 && (insn & 3) != 1)
6667 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6668 && ((insn & 3) == 0 || (insn & 3) == 3))))
6669 {
6670 insn &= ~(0x1f << 16);
6671 }
6672 else if ((insn & (0x1f << 21)) == reg << 21
6673 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6674 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6675 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6676 {
6677 insn &= ~(0x1f << 21);
6678 insn |= (insn & (0x1f << 16)) << 5;
6679 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6680 insn -= 2 >> 26; /* convert to ori,oris */
6681 }
6682 else
6683 insn = 0;
6684 return insn;
6685 }
6686
6687 /* The RELOCATE_SECTION function is called by the ELF backend linker
6688 to handle the relocations for a section.
6689
6690 The relocs are always passed as Rela structures; if the section
6691 actually uses Rel structures, the r_addend field will always be
6692 zero.
6693
6694 This function is responsible for adjust the section contents as
6695 necessary, and (if using Rela relocs and generating a
6696 relocatable output file) adjusting the reloc addend as
6697 necessary.
6698
6699 This function does not have to worry about setting the reloc
6700 address or the reloc symbol index.
6701
6702 LOCAL_SYMS is a pointer to the swapped in local symbols.
6703
6704 LOCAL_SECTIONS is an array giving the section in the input file
6705 corresponding to the st_shndx field of each local symbol.
6706
6707 The global hash table entry for the global symbols can be found
6708 via elf_sym_hashes (input_bfd).
6709
6710 When generating relocatable output, this function must handle
6711 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6712 going to be the section symbol corresponding to the output
6713 section, which means that the addend must be adjusted
6714 accordingly. */
6715
6716 static bfd_boolean
6717 ppc_elf_relocate_section (bfd *output_bfd,
6718 struct bfd_link_info *info,
6719 bfd *input_bfd,
6720 asection *input_section,
6721 bfd_byte *contents,
6722 Elf_Internal_Rela *relocs,
6723 Elf_Internal_Sym *local_syms,
6724 asection **local_sections)
6725 {
6726 Elf_Internal_Shdr *symtab_hdr;
6727 struct elf_link_hash_entry **sym_hashes;
6728 struct ppc_elf_link_hash_table *htab;
6729 Elf_Internal_Rela *rel;
6730 Elf_Internal_Rela *relend;
6731 Elf_Internal_Rela outrel;
6732 asection *got2, *sreloc = NULL;
6733 bfd_vma *local_got_offsets;
6734 bfd_boolean ret = TRUE;
6735 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6736 bfd_boolean is_vxworks_tls;
6737
6738 #ifdef DEBUG
6739 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6740 "%ld relocations%s",
6741 input_bfd, input_section,
6742 (long) input_section->reloc_count,
6743 (info->relocatable) ? " (relocatable)" : "");
6744 #endif
6745
6746 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6747
6748 /* Initialize howto table if not already done. */
6749 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6750 ppc_elf_howto_init ();
6751
6752 htab = ppc_elf_hash_table (info);
6753 local_got_offsets = elf_local_got_offsets (input_bfd);
6754 symtab_hdr = &elf_symtab_hdr (input_bfd);
6755 sym_hashes = elf_sym_hashes (input_bfd);
6756 /* We have to handle relocations in vxworks .tls_vars sections
6757 specially, because the dynamic loader is 'weird'. */
6758 is_vxworks_tls = (htab->is_vxworks && info->shared
6759 && !strcmp (input_section->output_section->name,
6760 ".tls_vars"));
6761 rel = relocs;
6762 relend = relocs + input_section->reloc_count;
6763 for (; rel < relend; rel++)
6764 {
6765 enum elf_ppc_reloc_type r_type;
6766 bfd_vma addend;
6767 bfd_reloc_status_type r;
6768 Elf_Internal_Sym *sym;
6769 asection *sec;
6770 struct elf_link_hash_entry *h;
6771 const char *sym_name;
6772 reloc_howto_type *howto;
6773 unsigned long r_symndx;
6774 bfd_vma relocation;
6775 bfd_vma branch_bit, from;
6776 bfd_boolean unresolved_reloc;
6777 bfd_boolean warned;
6778 unsigned int tls_type, tls_mask, tls_gd;
6779 struct plt_entry **ifunc;
6780
6781 r_type = ELF32_R_TYPE (rel->r_info);
6782 sym = NULL;
6783 sec = NULL;
6784 h = NULL;
6785 unresolved_reloc = FALSE;
6786 warned = FALSE;
6787 r_symndx = ELF32_R_SYM (rel->r_info);
6788
6789 if (r_symndx < symtab_hdr->sh_info)
6790 {
6791 sym = local_syms + r_symndx;
6792 sec = local_sections[r_symndx];
6793 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6794
6795 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6796 }
6797 else
6798 {
6799 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6800 r_symndx, symtab_hdr, sym_hashes,
6801 h, sec, relocation,
6802 unresolved_reloc, warned);
6803
6804 sym_name = h->root.root.string;
6805 }
6806
6807 if (sec != NULL && elf_discarded_section (sec))
6808 {
6809 /* For relocs against symbols from removed linkonce sections,
6810 or sections discarded by a linker script, we just want the
6811 section contents zeroed. Avoid any special processing. */
6812 howto = NULL;
6813 if (r_type < R_PPC_max)
6814 howto = ppc_elf_howto_table[r_type];
6815 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6816 rel->r_info = 0;
6817 rel->r_addend = 0;
6818 continue;
6819 }
6820
6821 if (info->relocatable)
6822 {
6823 if (got2 != NULL
6824 && r_type == R_PPC_PLTREL24
6825 && rel->r_addend >= 32768)
6826 {
6827 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6828 addend specifies the GOT pointer offset within .got2. */
6829 rel->r_addend += got2->output_offset;
6830 }
6831 continue;
6832 }
6833
6834 /* TLS optimizations. Replace instruction sequences and relocs
6835 based on information we collected in tls_optimize. We edit
6836 RELOCS so that --emit-relocs will output something sensible
6837 for the final instruction stream. */
6838 tls_mask = 0;
6839 tls_gd = 0;
6840 if (h != NULL)
6841 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6842 else if (local_got_offsets != NULL)
6843 {
6844 struct plt_entry **local_plt;
6845 char *lgot_masks;
6846 local_plt
6847 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6848 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6849 tls_mask = lgot_masks[r_symndx];
6850 }
6851
6852 /* Ensure reloc mapping code below stays sane. */
6853 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6854 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6855 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6856 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6857 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6858 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6859 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6860 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6861 abort ();
6862 switch (r_type)
6863 {
6864 default:
6865 break;
6866
6867 case R_PPC_GOT_TPREL16:
6868 case R_PPC_GOT_TPREL16_LO:
6869 if ((tls_mask & TLS_TLS) != 0
6870 && (tls_mask & TLS_TPREL) == 0)
6871 {
6872 bfd_vma insn;
6873
6874 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6875 insn &= 31 << 21;
6876 insn |= 0x3c020000; /* addis 0,2,0 */
6877 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6878 r_type = R_PPC_TPREL16_HA;
6879 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6880 }
6881 break;
6882
6883 case R_PPC_TLS:
6884 if ((tls_mask & TLS_TLS) != 0
6885 && (tls_mask & TLS_TPREL) == 0)
6886 {
6887 bfd_vma insn;
6888
6889 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6890 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6891 if (insn == 0)
6892 abort ();
6893 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6894 r_type = R_PPC_TPREL16_LO;
6895 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6896
6897 /* Was PPC_TLS which sits on insn boundary, now
6898 PPC_TPREL16_LO which is at low-order half-word. */
6899 rel->r_offset += d_offset;
6900 }
6901 break;
6902
6903 case R_PPC_GOT_TLSGD16_HI:
6904 case R_PPC_GOT_TLSGD16_HA:
6905 tls_gd = TLS_TPRELGD;
6906 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6907 goto tls_gdld_hi;
6908 break;
6909
6910 case R_PPC_GOT_TLSLD16_HI:
6911 case R_PPC_GOT_TLSLD16_HA:
6912 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6913 {
6914 tls_gdld_hi:
6915 if ((tls_mask & tls_gd) != 0)
6916 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6917 + R_PPC_GOT_TPREL16);
6918 else
6919 {
6920 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6921 rel->r_offset -= d_offset;
6922 r_type = R_PPC_NONE;
6923 }
6924 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6925 }
6926 break;
6927
6928 case R_PPC_GOT_TLSGD16:
6929 case R_PPC_GOT_TLSGD16_LO:
6930 tls_gd = TLS_TPRELGD;
6931 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6932 goto tls_ldgd_opt;
6933 break;
6934
6935 case R_PPC_GOT_TLSLD16:
6936 case R_PPC_GOT_TLSLD16_LO:
6937 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6938 {
6939 unsigned int insn1, insn2;
6940 bfd_vma offset;
6941
6942 tls_ldgd_opt:
6943 offset = (bfd_vma) -1;
6944 /* If not using the newer R_PPC_TLSGD/LD to mark
6945 __tls_get_addr calls, we must trust that the call
6946 stays with its arg setup insns, ie. that the next
6947 reloc is the __tls_get_addr call associated with
6948 the current reloc. Edit both insns. */
6949 if (input_section->has_tls_get_addr_call
6950 && rel + 1 < relend
6951 && branch_reloc_hash_match (input_bfd, rel + 1,
6952 htab->tls_get_addr))
6953 offset = rel[1].r_offset;
6954 if ((tls_mask & tls_gd) != 0)
6955 {
6956 /* IE */
6957 insn1 = bfd_get_32 (output_bfd,
6958 contents + rel->r_offset - d_offset);
6959 insn1 &= (1 << 26) - 1;
6960 insn1 |= 32 << 26; /* lwz */
6961 if (offset != (bfd_vma) -1)
6962 {
6963 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6964 insn2 = 0x7c631214; /* add 3,3,2 */
6965 bfd_put_32 (output_bfd, insn2, contents + offset);
6966 }
6967 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6968 + R_PPC_GOT_TPREL16);
6969 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6970 }
6971 else
6972 {
6973 /* LE */
6974 insn1 = 0x3c620000; /* addis 3,2,0 */
6975 if (tls_gd == 0)
6976 {
6977 /* Was an LD reloc. */
6978 for (r_symndx = 0;
6979 r_symndx < symtab_hdr->sh_info;
6980 r_symndx++)
6981 if (local_sections[r_symndx] == sec)
6982 break;
6983 if (r_symndx >= symtab_hdr->sh_info)
6984 r_symndx = 0;
6985 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6986 if (r_symndx != 0)
6987 rel->r_addend -= (local_syms[r_symndx].st_value
6988 + sec->output_offset
6989 + sec->output_section->vma);
6990 }
6991 r_type = R_PPC_TPREL16_HA;
6992 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6993 if (offset != (bfd_vma) -1)
6994 {
6995 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6996 rel[1].r_offset = offset + d_offset;
6997 rel[1].r_addend = rel->r_addend;
6998 insn2 = 0x38630000; /* addi 3,3,0 */
6999 bfd_put_32 (output_bfd, insn2, contents + offset);
7000 }
7001 }
7002 bfd_put_32 (output_bfd, insn1,
7003 contents + rel->r_offset - d_offset);
7004 if (tls_gd == 0)
7005 {
7006 /* We changed the symbol on an LD reloc. Start over
7007 in order to get h, sym, sec etc. right. */
7008 rel--;
7009 continue;
7010 }
7011 }
7012 break;
7013
7014 case R_PPC_TLSGD:
7015 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7016 {
7017 unsigned int insn2;
7018 bfd_vma offset = rel->r_offset;
7019
7020 if ((tls_mask & TLS_TPRELGD) != 0)
7021 {
7022 /* IE */
7023 r_type = R_PPC_NONE;
7024 insn2 = 0x7c631214; /* add 3,3,2 */
7025 }
7026 else
7027 {
7028 /* LE */
7029 r_type = R_PPC_TPREL16_LO;
7030 rel->r_offset += d_offset;
7031 insn2 = 0x38630000; /* addi 3,3,0 */
7032 }
7033 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7034 bfd_put_32 (output_bfd, insn2, contents + offset);
7035 /* Zap the reloc on the _tls_get_addr call too. */
7036 BFD_ASSERT (offset == rel[1].r_offset);
7037 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7038 }
7039 break;
7040
7041 case R_PPC_TLSLD:
7042 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7043 {
7044 unsigned int insn2;
7045
7046 for (r_symndx = 0;
7047 r_symndx < symtab_hdr->sh_info;
7048 r_symndx++)
7049 if (local_sections[r_symndx] == sec)
7050 break;
7051 if (r_symndx >= symtab_hdr->sh_info)
7052 r_symndx = 0;
7053 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7054 if (r_symndx != 0)
7055 rel->r_addend -= (local_syms[r_symndx].st_value
7056 + sec->output_offset
7057 + sec->output_section->vma);
7058
7059 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7060 rel->r_offset += d_offset;
7061 insn2 = 0x38630000; /* addi 3,3,0 */
7062 bfd_put_32 (output_bfd, insn2,
7063 contents + rel->r_offset - d_offset);
7064 /* Zap the reloc on the _tls_get_addr call too. */
7065 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7066 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7067 rel--;
7068 continue;
7069 }
7070 break;
7071 }
7072
7073 /* Handle other relocations that tweak non-addend part of insn. */
7074 branch_bit = 0;
7075 switch (r_type)
7076 {
7077 default:
7078 break;
7079
7080 /* Branch taken prediction relocations. */
7081 case R_PPC_ADDR14_BRTAKEN:
7082 case R_PPC_REL14_BRTAKEN:
7083 branch_bit = BRANCH_PREDICT_BIT;
7084 /* Fall thru */
7085
7086 /* Branch not taken prediction relocations. */
7087 case R_PPC_ADDR14_BRNTAKEN:
7088 case R_PPC_REL14_BRNTAKEN:
7089 {
7090 bfd_vma insn;
7091
7092 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7093 insn &= ~BRANCH_PREDICT_BIT;
7094 insn |= branch_bit;
7095
7096 from = (rel->r_offset
7097 + input_section->output_offset
7098 + input_section->output_section->vma);
7099
7100 /* Invert 'y' bit if not the default. */
7101 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7102 insn ^= BRANCH_PREDICT_BIT;
7103
7104 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7105 break;
7106 }
7107 }
7108
7109 ifunc = NULL;
7110 if (!htab->is_vxworks)
7111 {
7112 struct plt_entry *ent;
7113
7114 if (h != NULL)
7115 {
7116 if (h->type == STT_GNU_IFUNC)
7117 ifunc = &h->plt.plist;
7118 }
7119 else if (local_got_offsets != NULL
7120 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7121 {
7122 struct plt_entry **local_plt;
7123
7124 local_plt = (struct plt_entry **) (local_got_offsets
7125 + symtab_hdr->sh_info);
7126 ifunc = local_plt + r_symndx;
7127 }
7128
7129 ent = NULL;
7130 if (ifunc != NULL
7131 && (!info->shared
7132 || is_branch_reloc (r_type)))
7133 {
7134 addend = 0;
7135 if (r_type == R_PPC_PLTREL24 && info->shared)
7136 addend = rel->r_addend;
7137 ent = find_plt_ent (ifunc, got2, addend);
7138 }
7139 if (ent != NULL)
7140 {
7141 if (h == NULL && (ent->plt.offset & 1) == 0)
7142 {
7143 Elf_Internal_Rela rela;
7144 bfd_byte *loc;
7145
7146 rela.r_offset = (htab->iplt->output_section->vma
7147 + htab->iplt->output_offset
7148 + ent->plt.offset);
7149 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7150 rela.r_addend = relocation;
7151 loc = htab->reliplt->contents;
7152 loc += (htab->reliplt->reloc_count++
7153 * sizeof (Elf32_External_Rela));
7154 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7155
7156 ent->plt.offset |= 1;
7157 }
7158 if (h == NULL && (ent->glink_offset & 1) == 0)
7159 {
7160 unsigned char *p = ((unsigned char *) htab->glink->contents
7161 + ent->glink_offset);
7162 write_glink_stub (ent, htab->iplt, p, info);
7163 ent->glink_offset |= 1;
7164 }
7165
7166 unresolved_reloc = FALSE;
7167 if (htab->plt_type == PLT_NEW
7168 || !htab->elf.dynamic_sections_created
7169 || h == NULL)
7170 relocation = (htab->glink->output_section->vma
7171 + htab->glink->output_offset
7172 + (ent->glink_offset & ~1));
7173 else
7174 relocation = (htab->plt->output_section->vma
7175 + htab->plt->output_offset
7176 + ent->plt.offset);
7177 }
7178 }
7179
7180 addend = rel->r_addend;
7181 tls_type = 0;
7182 howto = NULL;
7183 if (r_type < R_PPC_max)
7184 howto = ppc_elf_howto_table[r_type];
7185 switch (r_type)
7186 {
7187 default:
7188 (*_bfd_error_handler)
7189 (_("%B: unknown relocation type %d for symbol %s"),
7190 input_bfd, (int) r_type, sym_name);
7191
7192 bfd_set_error (bfd_error_bad_value);
7193 ret = FALSE;
7194 continue;
7195
7196 case R_PPC_NONE:
7197 case R_PPC_TLS:
7198 case R_PPC_TLSGD:
7199 case R_PPC_TLSLD:
7200 case R_PPC_EMB_MRKREF:
7201 case R_PPC_GNU_VTINHERIT:
7202 case R_PPC_GNU_VTENTRY:
7203 continue;
7204
7205 /* GOT16 relocations. Like an ADDR16 using the symbol's
7206 address in the GOT as relocation value instead of the
7207 symbol's value itself. Also, create a GOT entry for the
7208 symbol and put the symbol value there. */
7209 case R_PPC_GOT_TLSGD16:
7210 case R_PPC_GOT_TLSGD16_LO:
7211 case R_PPC_GOT_TLSGD16_HI:
7212 case R_PPC_GOT_TLSGD16_HA:
7213 tls_type = TLS_TLS | TLS_GD;
7214 goto dogot;
7215
7216 case R_PPC_GOT_TLSLD16:
7217 case R_PPC_GOT_TLSLD16_LO:
7218 case R_PPC_GOT_TLSLD16_HI:
7219 case R_PPC_GOT_TLSLD16_HA:
7220 tls_type = TLS_TLS | TLS_LD;
7221 goto dogot;
7222
7223 case R_PPC_GOT_TPREL16:
7224 case R_PPC_GOT_TPREL16_LO:
7225 case R_PPC_GOT_TPREL16_HI:
7226 case R_PPC_GOT_TPREL16_HA:
7227 tls_type = TLS_TLS | TLS_TPREL;
7228 goto dogot;
7229
7230 case R_PPC_GOT_DTPREL16:
7231 case R_PPC_GOT_DTPREL16_LO:
7232 case R_PPC_GOT_DTPREL16_HI:
7233 case R_PPC_GOT_DTPREL16_HA:
7234 tls_type = TLS_TLS | TLS_DTPREL;
7235 goto dogot;
7236
7237 case R_PPC_GOT16:
7238 case R_PPC_GOT16_LO:
7239 case R_PPC_GOT16_HI:
7240 case R_PPC_GOT16_HA:
7241 tls_mask = 0;
7242 dogot:
7243 {
7244 /* Relocation is to the entry for this symbol in the global
7245 offset table. */
7246 bfd_vma off;
7247 bfd_vma *offp;
7248 unsigned long indx;
7249
7250 if (htab->got == NULL)
7251 abort ();
7252
7253 indx = 0;
7254 if (tls_type == (TLS_TLS | TLS_LD)
7255 && (h == NULL
7256 || !h->def_dynamic))
7257 offp = &htab->tlsld_got.offset;
7258 else if (h != NULL)
7259 {
7260 bfd_boolean dyn;
7261 dyn = htab->elf.dynamic_sections_created;
7262 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7263 || (info->shared
7264 && SYMBOL_REFERENCES_LOCAL (info, h)))
7265 /* This is actually a static link, or it is a
7266 -Bsymbolic link and the symbol is defined
7267 locally, or the symbol was forced to be local
7268 because of a version file. */
7269 ;
7270 else
7271 {
7272 indx = h->dynindx;
7273 unresolved_reloc = FALSE;
7274 }
7275 offp = &h->got.offset;
7276 }
7277 else
7278 {
7279 if (local_got_offsets == NULL)
7280 abort ();
7281 offp = &local_got_offsets[r_symndx];
7282 }
7283
7284 /* The offset must always be a multiple of 4. We use the
7285 least significant bit to record whether we have already
7286 processed this entry. */
7287 off = *offp;
7288 if ((off & 1) != 0)
7289 off &= ~1;
7290 else
7291 {
7292 unsigned int tls_m = (tls_mask
7293 & (TLS_LD | TLS_GD | TLS_DTPREL
7294 | TLS_TPREL | TLS_TPRELGD));
7295
7296 if (offp == &htab->tlsld_got.offset)
7297 tls_m = TLS_LD;
7298 else if (h == NULL
7299 || !h->def_dynamic)
7300 tls_m &= ~TLS_LD;
7301
7302 /* We might have multiple got entries for this sym.
7303 Initialize them all. */
7304 do
7305 {
7306 int tls_ty = 0;
7307
7308 if ((tls_m & TLS_LD) != 0)
7309 {
7310 tls_ty = TLS_TLS | TLS_LD;
7311 tls_m &= ~TLS_LD;
7312 }
7313 else if ((tls_m & TLS_GD) != 0)
7314 {
7315 tls_ty = TLS_TLS | TLS_GD;
7316 tls_m &= ~TLS_GD;
7317 }
7318 else if ((tls_m & TLS_DTPREL) != 0)
7319 {
7320 tls_ty = TLS_TLS | TLS_DTPREL;
7321 tls_m &= ~TLS_DTPREL;
7322 }
7323 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7324 {
7325 tls_ty = TLS_TLS | TLS_TPREL;
7326 tls_m = 0;
7327 }
7328
7329 /* Generate relocs for the dynamic linker. */
7330 if ((info->shared || indx != 0)
7331 && (offp == &htab->tlsld_got.offset
7332 || h == NULL
7333 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7334 || h->root.type != bfd_link_hash_undefweak))
7335 {
7336 asection *rsec = htab->relgot;
7337 bfd_byte * loc;
7338
7339 outrel.r_offset = (htab->got->output_section->vma
7340 + htab->got->output_offset
7341 + off);
7342 outrel.r_addend = 0;
7343 if (tls_ty & (TLS_LD | TLS_GD))
7344 {
7345 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7346 if (tls_ty == (TLS_TLS | TLS_GD))
7347 {
7348 loc = rsec->contents;
7349 loc += (rsec->reloc_count++
7350 * sizeof (Elf32_External_Rela));
7351 bfd_elf32_swap_reloca_out (output_bfd,
7352 &outrel, loc);
7353 outrel.r_offset += 4;
7354 outrel.r_info
7355 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7356 }
7357 }
7358 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7359 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7360 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7361 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7362 else if (indx != 0)
7363 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7364 else if (ifunc != NULL)
7365 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7366 else
7367 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7368 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7369 {
7370 outrel.r_addend += relocation;
7371 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7372 outrel.r_addend -= htab->elf.tls_sec->vma;
7373 }
7374 loc = rsec->contents;
7375 loc += (rsec->reloc_count++
7376 * sizeof (Elf32_External_Rela));
7377 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7378 }
7379
7380 /* Init the .got section contents if we're not
7381 emitting a reloc. */
7382 else
7383 {
7384 bfd_vma value = relocation;
7385
7386 if (tls_ty == (TLS_TLS | TLS_LD))
7387 value = 1;
7388 else if (tls_ty != 0)
7389 {
7390 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7391 if (tls_ty == (TLS_TLS | TLS_TPREL))
7392 value += DTP_OFFSET - TP_OFFSET;
7393
7394 if (tls_ty == (TLS_TLS | TLS_GD))
7395 {
7396 bfd_put_32 (output_bfd, value,
7397 htab->got->contents + off + 4);
7398 value = 1;
7399 }
7400 }
7401 bfd_put_32 (output_bfd, value,
7402 htab->got->contents + off);
7403 }
7404
7405 off += 4;
7406 if (tls_ty & (TLS_LD | TLS_GD))
7407 off += 4;
7408 }
7409 while (tls_m != 0);
7410
7411 off = *offp;
7412 *offp = off | 1;
7413 }
7414
7415 if (off >= (bfd_vma) -2)
7416 abort ();
7417
7418 if ((tls_type & TLS_TLS) != 0)
7419 {
7420 if (tls_type != (TLS_TLS | TLS_LD))
7421 {
7422 if ((tls_mask & TLS_LD) != 0
7423 && !(h == NULL
7424 || !h->def_dynamic))
7425 off += 8;
7426 if (tls_type != (TLS_TLS | TLS_GD))
7427 {
7428 if ((tls_mask & TLS_GD) != 0)
7429 off += 8;
7430 if (tls_type != (TLS_TLS | TLS_DTPREL))
7431 {
7432 if ((tls_mask & TLS_DTPREL) != 0)
7433 off += 4;
7434 }
7435 }
7436 }
7437 }
7438
7439 relocation = (htab->got->output_section->vma
7440 + htab->got->output_offset
7441 + off
7442 - SYM_VAL (htab->elf.hgot));
7443
7444 /* Addends on got relocations don't make much sense.
7445 x+off@got is actually x@got+off, and since the got is
7446 generated by a hash table traversal, the value in the
7447 got at entry m+n bears little relation to the entry m. */
7448 if (addend != 0)
7449 (*_bfd_error_handler)
7450 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7451 input_bfd,
7452 input_section,
7453 (long) rel->r_offset,
7454 howto->name,
7455 sym_name);
7456 }
7457 break;
7458
7459 /* Relocations that need no special processing. */
7460 case R_PPC_LOCAL24PC:
7461 /* It makes no sense to point a local relocation
7462 at a symbol not in this object. */
7463 if (unresolved_reloc)
7464 {
7465 if (! (*info->callbacks->undefined_symbol) (info,
7466 h->root.root.string,
7467 input_bfd,
7468 input_section,
7469 rel->r_offset,
7470 TRUE))
7471 return FALSE;
7472 continue;
7473 }
7474 break;
7475
7476 case R_PPC_DTPREL16:
7477 case R_PPC_DTPREL16_LO:
7478 case R_PPC_DTPREL16_HI:
7479 case R_PPC_DTPREL16_HA:
7480 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7481 break;
7482
7483 /* Relocations that may need to be propagated if this is a shared
7484 object. */
7485 case R_PPC_TPREL16:
7486 case R_PPC_TPREL16_LO:
7487 case R_PPC_TPREL16_HI:
7488 case R_PPC_TPREL16_HA:
7489 if (h != NULL
7490 && h->root.type == bfd_link_hash_undefweak
7491 && h->dynindx == -1)
7492 {
7493 /* Make this relocation against an undefined weak symbol
7494 resolve to zero. This is really just a tweak, since
7495 code using weak externs ought to check that they are
7496 defined before using them. */
7497 bfd_byte *p = contents + rel->r_offset - d_offset;
7498 unsigned int insn = bfd_get_32 (output_bfd, p);
7499 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7500 if (insn != 0)
7501 bfd_put_32 (output_bfd, insn, p);
7502 break;
7503 }
7504 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7505 /* The TPREL16 relocs shouldn't really be used in shared
7506 libs as they will result in DT_TEXTREL being set, but
7507 support them anyway. */
7508 goto dodyn;
7509
7510 case R_PPC_TPREL32:
7511 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7512 goto dodyn;
7513
7514 case R_PPC_DTPREL32:
7515 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7516 goto dodyn;
7517
7518 case R_PPC_DTPMOD32:
7519 relocation = 1;
7520 addend = 0;
7521 goto dodyn;
7522
7523 case R_PPC_REL16:
7524 case R_PPC_REL16_LO:
7525 case R_PPC_REL16_HI:
7526 case R_PPC_REL16_HA:
7527 break;
7528
7529 case R_PPC_REL32:
7530 if (h == NULL || h == htab->elf.hgot)
7531 break;
7532 /* fall through */
7533
7534 case R_PPC_ADDR32:
7535 case R_PPC_ADDR16:
7536 case R_PPC_ADDR16_LO:
7537 case R_PPC_ADDR16_HI:
7538 case R_PPC_ADDR16_HA:
7539 case R_PPC_UADDR32:
7540 case R_PPC_UADDR16:
7541 goto dodyn;
7542
7543 case R_PPC_REL24:
7544 case R_PPC_REL14:
7545 case R_PPC_REL14_BRTAKEN:
7546 case R_PPC_REL14_BRNTAKEN:
7547 /* If these relocations are not to a named symbol, they can be
7548 handled right here, no need to bother the dynamic linker. */
7549 if (SYMBOL_CALLS_LOCAL (info, h)
7550 || h == htab->elf.hgot)
7551 break;
7552 /* fall through */
7553
7554 case R_PPC_ADDR24:
7555 case R_PPC_ADDR14:
7556 case R_PPC_ADDR14_BRTAKEN:
7557 case R_PPC_ADDR14_BRNTAKEN:
7558 if (h != NULL && !info->shared)
7559 break;
7560 /* fall through */
7561
7562 dodyn:
7563 if ((input_section->flags & SEC_ALLOC) == 0
7564 || is_vxworks_tls)
7565 break;
7566
7567 if ((info->shared
7568 && !(h != NULL
7569 && ((h->root.type == bfd_link_hash_undefined
7570 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7571 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7572 || (h->root.type == bfd_link_hash_undefweak
7573 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7574 && (must_be_dyn_reloc (info, r_type)
7575 || !SYMBOL_CALLS_LOCAL (info, h)))
7576 || (ELIMINATE_COPY_RELOCS
7577 && !info->shared
7578 && h != NULL
7579 && h->dynindx != -1
7580 && !h->non_got_ref
7581 && !h->def_regular))
7582 {
7583 int skip;
7584 bfd_byte * loc;
7585 #ifdef DEBUG
7586 fprintf (stderr, "ppc_elf_relocate_section needs to "
7587 "create relocation for %s\n",
7588 (h && h->root.root.string
7589 ? h->root.root.string : "<unknown>"));
7590 #endif
7591
7592 /* When generating a shared object, these relocations
7593 are copied into the output file to be resolved at run
7594 time. */
7595 if (sreloc == NULL)
7596 {
7597 sreloc = elf_section_data (input_section)->sreloc;
7598 if (!htab->elf.dynamic_sections_created)
7599 sreloc = htab->reliplt;
7600 if (sreloc == NULL)
7601 return FALSE;
7602 }
7603
7604 skip = 0;
7605 outrel.r_offset =
7606 _bfd_elf_section_offset (output_bfd, info, input_section,
7607 rel->r_offset);
7608 if (outrel.r_offset == (bfd_vma) -1
7609 || outrel.r_offset == (bfd_vma) -2)
7610 skip = (int) outrel.r_offset;
7611 outrel.r_offset += (input_section->output_section->vma
7612 + input_section->output_offset);
7613
7614 if (skip)
7615 memset (&outrel, 0, sizeof outrel);
7616 else if ((h != NULL
7617 && (h->root.type == bfd_link_hash_undefined
7618 || h->root.type == bfd_link_hash_undefweak))
7619 || !SYMBOL_REFERENCES_LOCAL (info, h))
7620 {
7621 unresolved_reloc = FALSE;
7622 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7623 outrel.r_addend = rel->r_addend;
7624 }
7625 else
7626 {
7627 outrel.r_addend = relocation + rel->r_addend;
7628
7629 if (r_type != R_PPC_ADDR32)
7630 {
7631 long indx = 0;
7632
7633 if (ifunc != NULL)
7634 {
7635 /* If we get here when building a static
7636 executable, then the libc startup function
7637 responsible for applying indirect function
7638 relocations is going to complain about
7639 the reloc type.
7640 If we get here when building a dynamic
7641 executable, it will be because we have
7642 a text relocation. The dynamic loader
7643 will set the text segment writable and
7644 non-executable to apply text relocations.
7645 So we'll segfault when trying to run the
7646 indirection function to resolve the reloc. */
7647 (*_bfd_error_handler)
7648 (_("%B(%A+0x%lx): relocation %s for indirect "
7649 "function %s unsupported"),
7650 input_bfd,
7651 input_section,
7652 (long) rel->r_offset,
7653 howto->name,
7654 sym_name);
7655 ret = FALSE;
7656 }
7657 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7658 ;
7659 else if (sec == NULL || sec->owner == NULL)
7660 {
7661 bfd_set_error (bfd_error_bad_value);
7662 ret = FALSE;
7663 }
7664 else
7665 {
7666 asection *osec;
7667
7668 /* We are turning this relocation into one
7669 against a section symbol. It would be
7670 proper to subtract the symbol's value,
7671 osec->vma, from the emitted reloc addend,
7672 but ld.so expects buggy relocs.
7673 FIXME: Why not always use a zero index? */
7674 osec = sec->output_section;
7675 indx = elf_section_data (osec)->dynindx;
7676 if (indx == 0)
7677 {
7678 osec = htab->elf.text_index_section;
7679 indx = elf_section_data (osec)->dynindx;
7680 }
7681 BFD_ASSERT (indx != 0);
7682 #ifdef DEBUG
7683 if (indx == 0)
7684 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7685 indx, osec->name, osec->flags,
7686 h->root.root.string);
7687 #endif
7688 }
7689
7690 outrel.r_info = ELF32_R_INFO (indx, r_type);
7691 }
7692 else if (ifunc != NULL)
7693 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7694 else
7695 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7696 }
7697
7698 loc = sreloc->contents;
7699 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7700 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7701
7702 if (skip == -1)
7703 continue;
7704
7705 /* This reloc will be computed at runtime. We clear the memory
7706 so that it contains predictable value. */
7707 if (! skip
7708 && ((input_section->flags & SEC_ALLOC) != 0
7709 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7710 {
7711 relocation = howto->pc_relative ? outrel.r_offset : 0;
7712 addend = 0;
7713 break;
7714 }
7715 }
7716 break;
7717
7718 case R_PPC_RELAX_PLT:
7719 case R_PPC_RELAX_PLTREL24:
7720 if (h != NULL)
7721 {
7722 struct plt_entry *ent;
7723 bfd_vma got2_addend = 0;
7724
7725 if (r_type == R_PPC_RELAX_PLTREL24)
7726 {
7727 if (info->shared)
7728 got2_addend = addend;
7729 addend = 0;
7730 }
7731 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7732 if (htab->plt_type == PLT_NEW)
7733 relocation = (htab->glink->output_section->vma
7734 + htab->glink->output_offset
7735 + ent->glink_offset);
7736 else
7737 relocation = (htab->plt->output_section->vma
7738 + htab->plt->output_offset
7739 + ent->plt.offset);
7740 }
7741 /* Fall thru */
7742
7743 case R_PPC_RELAX:
7744 if (info->shared)
7745 relocation -= (input_section->output_section->vma
7746 + input_section->output_offset
7747 + rel->r_offset - 4);
7748
7749 {
7750 unsigned long t0;
7751 unsigned long t1;
7752
7753 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7754 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7755
7756 /* We're clearing the bits for R_PPC_ADDR16_HA
7757 and R_PPC_ADDR16_LO here. */
7758 t0 &= ~0xffff;
7759 t1 &= ~0xffff;
7760
7761 /* t0 is HA, t1 is LO */
7762 relocation += addend;
7763 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7764 t1 |= relocation & 0xffff;
7765
7766 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7767 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7768
7769 /* Rewrite the reloc and convert one of the trailing nop
7770 relocs to describe this relocation. */
7771 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7772 /* The relocs are at the bottom 2 bytes */
7773 rel[0].r_offset += 2;
7774 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7775 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7776 rel[1].r_offset += 4;
7777 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7778 rel++;
7779 }
7780 continue;
7781
7782 /* Indirect .sdata relocation. */
7783 case R_PPC_EMB_SDAI16:
7784 BFD_ASSERT (htab->sdata[0].section != NULL);
7785 if (!is_static_defined (htab->sdata[0].sym))
7786 {
7787 unresolved_reloc = TRUE;
7788 break;
7789 }
7790 relocation
7791 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7792 h, relocation, rel);
7793 addend = 0;
7794 break;
7795
7796 /* Indirect .sdata2 relocation. */
7797 case R_PPC_EMB_SDA2I16:
7798 BFD_ASSERT (htab->sdata[1].section != NULL);
7799 if (!is_static_defined (htab->sdata[1].sym))
7800 {
7801 unresolved_reloc = TRUE;
7802 break;
7803 }
7804 relocation
7805 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7806 h, relocation, rel);
7807 addend = 0;
7808 break;
7809
7810 /* Handle the TOC16 reloc. We want to use the offset within the .got
7811 section, not the actual VMA. This is appropriate when generating
7812 an embedded ELF object, for which the .got section acts like the
7813 AIX .toc section. */
7814 case R_PPC_TOC16: /* phony GOT16 relocations */
7815 if (sec == NULL || sec->output_section == NULL)
7816 {
7817 unresolved_reloc = TRUE;
7818 break;
7819 }
7820 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7821 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7822
7823 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7824 break;
7825
7826 case R_PPC_PLTREL24:
7827 if (h == NULL || ifunc != NULL)
7828 break;
7829 /* Relocation is to the entry for this symbol in the
7830 procedure linkage table. */
7831 {
7832 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7833 info->shared ? addend : 0);
7834 addend = 0;
7835 if (ent == NULL
7836 || htab->plt == NULL)
7837 {
7838 /* We didn't make a PLT entry for this symbol. This
7839 happens when statically linking PIC code, or when
7840 using -Bsymbolic. */
7841 break;
7842 }
7843
7844 unresolved_reloc = FALSE;
7845 if (htab->plt_type == PLT_NEW)
7846 relocation = (htab->glink->output_section->vma
7847 + htab->glink->output_offset
7848 + ent->glink_offset);
7849 else
7850 relocation = (htab->plt->output_section->vma
7851 + htab->plt->output_offset
7852 + ent->plt.offset);
7853 }
7854 break;
7855
7856 /* Relocate against _SDA_BASE_. */
7857 case R_PPC_SDAREL16:
7858 {
7859 const char *name;
7860 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7861
7862 if (sec == NULL
7863 || sec->output_section == NULL
7864 || !is_static_defined (sda))
7865 {
7866 unresolved_reloc = TRUE;
7867 break;
7868 }
7869 addend -= SYM_VAL (sda);
7870
7871 name = bfd_get_section_name (abfd, sec->output_section);
7872 if (! ((CONST_STRNEQ (name, ".sdata")
7873 && (name[6] == 0 || name[6] == '.'))
7874 || (CONST_STRNEQ (name, ".sbss")
7875 && (name[5] == 0 || name[5] == '.'))))
7876 {
7877 (*_bfd_error_handler)
7878 (_("%B: the target (%s) of a %s relocation is "
7879 "in the wrong output section (%s)"),
7880 input_bfd,
7881 sym_name,
7882 howto->name,
7883 name);
7884 }
7885 }
7886 break;
7887
7888 /* Relocate against _SDA2_BASE_. */
7889 case R_PPC_EMB_SDA2REL:
7890 {
7891 const char *name;
7892 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7893
7894 if (sec == NULL
7895 || sec->output_section == NULL
7896 || !is_static_defined (sda))
7897 {
7898 unresolved_reloc = TRUE;
7899 break;
7900 }
7901 addend -= SYM_VAL (sda);
7902
7903 name = bfd_get_section_name (abfd, sec->output_section);
7904 if (! (CONST_STRNEQ (name, ".sdata2")
7905 || CONST_STRNEQ (name, ".sbss2")))
7906 {
7907 (*_bfd_error_handler)
7908 (_("%B: the target (%s) of a %s relocation is "
7909 "in the wrong output section (%s)"),
7910 input_bfd,
7911 sym_name,
7912 howto->name,
7913 name);
7914 }
7915 }
7916 break;
7917
7918 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7919 case R_PPC_EMB_SDA21:
7920 case R_PPC_EMB_RELSDA:
7921 {
7922 const char *name;
7923 int reg;
7924 struct elf_link_hash_entry *sda = NULL;
7925
7926 if (sec == NULL || sec->output_section == NULL)
7927 {
7928 unresolved_reloc = TRUE;
7929 break;
7930 }
7931
7932 name = bfd_get_section_name (abfd, sec->output_section);
7933 if (((CONST_STRNEQ (name, ".sdata")
7934 && (name[6] == 0 || name[6] == '.'))
7935 || (CONST_STRNEQ (name, ".sbss")
7936 && (name[5] == 0 || name[5] == '.'))))
7937 {
7938 reg = 13;
7939 sda = htab->sdata[0].sym;
7940 }
7941 else if (CONST_STRNEQ (name, ".sdata2")
7942 || CONST_STRNEQ (name, ".sbss2"))
7943 {
7944 reg = 2;
7945 sda = htab->sdata[1].sym;
7946 }
7947 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7948 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7949 {
7950 reg = 0;
7951 }
7952 else
7953 {
7954 (*_bfd_error_handler)
7955 (_("%B: the target (%s) of a %s relocation is "
7956 "in the wrong output section (%s)"),
7957 input_bfd,
7958 sym_name,
7959 howto->name,
7960 name);
7961
7962 bfd_set_error (bfd_error_bad_value);
7963 ret = FALSE;
7964 continue;
7965 }
7966
7967 if (sda != NULL)
7968 {
7969 if (!is_static_defined (sda))
7970 {
7971 unresolved_reloc = TRUE;
7972 break;
7973 }
7974 addend -= SYM_VAL (sda);
7975 }
7976
7977 if (r_type == R_PPC_EMB_SDA21)
7978 {
7979 bfd_vma insn; /* Fill in register field. */
7980
7981 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7982 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7983 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7984 }
7985 }
7986 break;
7987
7988 /* Relocate against the beginning of the section. */
7989 case R_PPC_SECTOFF:
7990 case R_PPC_SECTOFF_LO:
7991 case R_PPC_SECTOFF_HI:
7992 case R_PPC_SECTOFF_HA:
7993 if (sec == NULL || sec->output_section == NULL)
7994 {
7995 unresolved_reloc = TRUE;
7996 break;
7997 }
7998 addend -= sec->output_section->vma;
7999 break;
8000
8001 /* Negative relocations. */
8002 case R_PPC_EMB_NADDR32:
8003 case R_PPC_EMB_NADDR16:
8004 case R_PPC_EMB_NADDR16_LO:
8005 case R_PPC_EMB_NADDR16_HI:
8006 case R_PPC_EMB_NADDR16_HA:
8007 addend -= 2 * relocation;
8008 break;
8009
8010 case R_PPC_COPY:
8011 case R_PPC_GLOB_DAT:
8012 case R_PPC_JMP_SLOT:
8013 case R_PPC_RELATIVE:
8014 case R_PPC_IRELATIVE:
8015 case R_PPC_PLT32:
8016 case R_PPC_PLTREL32:
8017 case R_PPC_PLT16_LO:
8018 case R_PPC_PLT16_HI:
8019 case R_PPC_PLT16_HA:
8020 case R_PPC_ADDR30:
8021 case R_PPC_EMB_RELSEC16:
8022 case R_PPC_EMB_RELST_LO:
8023 case R_PPC_EMB_RELST_HI:
8024 case R_PPC_EMB_RELST_HA:
8025 case R_PPC_EMB_BIT_FLD:
8026 (*_bfd_error_handler)
8027 (_("%B: relocation %s is not yet supported for symbol %s."),
8028 input_bfd,
8029 howto->name,
8030 sym_name);
8031
8032 bfd_set_error (bfd_error_invalid_operation);
8033 ret = FALSE;
8034 continue;
8035 }
8036
8037 /* Do any further special processing. */
8038 switch (r_type)
8039 {
8040 default:
8041 break;
8042
8043 case R_PPC_ADDR16_HA:
8044 case R_PPC_REL16_HA:
8045 case R_PPC_SECTOFF_HA:
8046 case R_PPC_TPREL16_HA:
8047 case R_PPC_DTPREL16_HA:
8048 case R_PPC_EMB_NADDR16_HA:
8049 case R_PPC_EMB_RELST_HA:
8050 /* It's just possible that this symbol is a weak symbol
8051 that's not actually defined anywhere. In that case,
8052 'sec' would be NULL, and we should leave the symbol
8053 alone (it will be set to zero elsewhere in the link). */
8054 if (sec == NULL)
8055 break;
8056 /* Fall thru */
8057
8058 case R_PPC_PLT16_HA:
8059 case R_PPC_GOT16_HA:
8060 case R_PPC_GOT_TLSGD16_HA:
8061 case R_PPC_GOT_TLSLD16_HA:
8062 case R_PPC_GOT_TPREL16_HA:
8063 case R_PPC_GOT_DTPREL16_HA:
8064 /* Add 0x10000 if sign bit in 0:15 is set.
8065 Bits 0:15 are not used. */
8066 addend += 0x8000;
8067 break;
8068 }
8069
8070 #ifdef DEBUG
8071 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8072 "offset = %ld, addend = %ld\n",
8073 howto->name,
8074 (int) r_type,
8075 sym_name,
8076 r_symndx,
8077 (long) rel->r_offset,
8078 (long) addend);
8079 #endif
8080
8081 if (unresolved_reloc
8082 && !((input_section->flags & SEC_DEBUGGING) != 0
8083 && h->def_dynamic))
8084 {
8085 (*_bfd_error_handler)
8086 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8087 input_bfd,
8088 input_section,
8089 (long) rel->r_offset,
8090 howto->name,
8091 sym_name);
8092 ret = FALSE;
8093 }
8094
8095 r = _bfd_final_link_relocate (howto,
8096 input_bfd,
8097 input_section,
8098 contents,
8099 rel->r_offset,
8100 relocation,
8101 addend);
8102
8103 if (r != bfd_reloc_ok)
8104 {
8105 if (r == bfd_reloc_overflow)
8106 {
8107 if (warned)
8108 continue;
8109 if (h != NULL
8110 && h->root.type == bfd_link_hash_undefweak
8111 && howto->pc_relative)
8112 {
8113 /* Assume this is a call protected by other code that
8114 detect the symbol is undefined. If this is the case,
8115 we can safely ignore the overflow. If not, the
8116 program is hosed anyway, and a little warning isn't
8117 going to help. */
8118
8119 continue;
8120 }
8121
8122 if (! (*info->callbacks->reloc_overflow) (info,
8123 (h ? &h->root : NULL),
8124 sym_name,
8125 howto->name,
8126 rel->r_addend,
8127 input_bfd,
8128 input_section,
8129 rel->r_offset))
8130 return FALSE;
8131 }
8132 else
8133 {
8134 (*_bfd_error_handler)
8135 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8136 input_bfd, input_section,
8137 (long) rel->r_offset, howto->name, sym_name, (int) r);
8138 ret = FALSE;
8139 }
8140 }
8141 }
8142
8143 #ifdef DEBUG
8144 fprintf (stderr, "\n");
8145 #endif
8146
8147 return ret;
8148 }
8149 \f
8150 /* Finish up dynamic symbol handling. We set the contents of various
8151 dynamic sections here. */
8152
8153 static bfd_boolean
8154 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8155 struct bfd_link_info *info,
8156 struct elf_link_hash_entry *h,
8157 Elf_Internal_Sym *sym)
8158 {
8159 struct ppc_elf_link_hash_table *htab;
8160 struct plt_entry *ent;
8161 bfd_boolean doneone;
8162
8163 #ifdef DEBUG
8164 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8165 h->root.root.string);
8166 #endif
8167
8168 htab = ppc_elf_hash_table (info);
8169 BFD_ASSERT (htab->elf.dynobj != NULL);
8170
8171 doneone = FALSE;
8172 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8173 if (ent->plt.offset != (bfd_vma) -1)
8174 {
8175 if (!doneone)
8176 {
8177 Elf_Internal_Rela rela;
8178 bfd_byte *loc;
8179 bfd_vma reloc_index;
8180
8181 if (htab->plt_type == PLT_NEW
8182 || !htab->elf.dynamic_sections_created
8183 || h->dynindx == -1)
8184 reloc_index = ent->plt.offset / 4;
8185 else
8186 {
8187 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8188 / htab->plt_slot_size);
8189 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8190 && htab->plt_type == PLT_OLD)
8191 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8192 }
8193
8194 /* This symbol has an entry in the procedure linkage table.
8195 Set it up. */
8196 if (htab->plt_type == PLT_VXWORKS
8197 && htab->elf.dynamic_sections_created
8198 && h->dynindx != -1)
8199 {
8200 bfd_vma got_offset;
8201 const bfd_vma *plt_entry;
8202
8203 /* The first three entries in .got.plt are reserved. */
8204 got_offset = (reloc_index + 3) * 4;
8205
8206 /* Use the right PLT. */
8207 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8208 : ppc_elf_vxworks_plt_entry;
8209
8210 /* Fill in the .plt on VxWorks. */
8211 if (info->shared)
8212 {
8213 bfd_put_32 (output_bfd,
8214 plt_entry[0] | PPC_HA (got_offset),
8215 htab->plt->contents + ent->plt.offset + 0);
8216 bfd_put_32 (output_bfd,
8217 plt_entry[1] | PPC_LO (got_offset),
8218 htab->plt->contents + ent->plt.offset + 4);
8219 }
8220 else
8221 {
8222 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8223
8224 bfd_put_32 (output_bfd,
8225 plt_entry[0] | PPC_HA (got_loc),
8226 htab->plt->contents + ent->plt.offset + 0);
8227 bfd_put_32 (output_bfd,
8228 plt_entry[1] | PPC_LO (got_loc),
8229 htab->plt->contents + ent->plt.offset + 4);
8230 }
8231
8232 bfd_put_32 (output_bfd, plt_entry[2],
8233 htab->plt->contents + ent->plt.offset + 8);
8234 bfd_put_32 (output_bfd, plt_entry[3],
8235 htab->plt->contents + ent->plt.offset + 12);
8236
8237 /* This instruction is an immediate load. The value loaded is
8238 the byte offset of the R_PPC_JMP_SLOT relocation from the
8239 start of the .rela.plt section. The value is stored in the
8240 low-order 16 bits of the load instruction. */
8241 /* NOTE: It appears that this is now an index rather than a
8242 prescaled offset. */
8243 bfd_put_32 (output_bfd,
8244 plt_entry[4] | reloc_index,
8245 htab->plt->contents + ent->plt.offset + 16);
8246 /* This instruction is a PC-relative branch whose target is
8247 the start of the PLT section. The address of this branch
8248 instruction is 20 bytes beyond the start of this PLT entry.
8249 The address is encoded in bits 6-29, inclusive. The value
8250 stored is right-shifted by two bits, permitting a 26-bit
8251 offset. */
8252 bfd_put_32 (output_bfd,
8253 (plt_entry[5]
8254 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8255 htab->plt->contents + ent->plt.offset + 20);
8256 bfd_put_32 (output_bfd, plt_entry[6],
8257 htab->plt->contents + ent->plt.offset + 24);
8258 bfd_put_32 (output_bfd, plt_entry[7],
8259 htab->plt->contents + ent->plt.offset + 28);
8260
8261 /* Fill in the GOT entry corresponding to this PLT slot with
8262 the address immediately after the the "bctr" instruction
8263 in this PLT entry. */
8264 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8265 + htab->plt->output_offset
8266 + ent->plt.offset + 16),
8267 htab->sgotplt->contents + got_offset);
8268
8269 if (!info->shared)
8270 {
8271 /* Fill in a couple of entries in .rela.plt.unloaded. */
8272 loc = htab->srelplt2->contents
8273 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8274 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8275 * sizeof (Elf32_External_Rela));
8276
8277 /* Provide the @ha relocation for the first instruction. */
8278 rela.r_offset = (htab->plt->output_section->vma
8279 + htab->plt->output_offset
8280 + ent->plt.offset + 2);
8281 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8282 R_PPC_ADDR16_HA);
8283 rela.r_addend = got_offset;
8284 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8285 loc += sizeof (Elf32_External_Rela);
8286
8287 /* Provide the @l relocation for the second instruction. */
8288 rela.r_offset = (htab->plt->output_section->vma
8289 + htab->plt->output_offset
8290 + ent->plt.offset + 6);
8291 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8292 R_PPC_ADDR16_LO);
8293 rela.r_addend = got_offset;
8294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8295 loc += sizeof (Elf32_External_Rela);
8296
8297 /* Provide a relocation for the GOT entry corresponding to this
8298 PLT slot. Point it at the middle of the .plt entry. */
8299 rela.r_offset = (htab->sgotplt->output_section->vma
8300 + htab->sgotplt->output_offset
8301 + got_offset);
8302 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8303 R_PPC_ADDR32);
8304 rela.r_addend = ent->plt.offset + 16;
8305 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8306 }
8307
8308 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8309 In particular, the offset for the relocation is not the
8310 address of the PLT entry for this function, as specified
8311 by the ABI. Instead, the offset is set to the address of
8312 the GOT slot for this function. See EABI 4.4.4.1. */
8313 rela.r_offset = (htab->sgotplt->output_section->vma
8314 + htab->sgotplt->output_offset
8315 + got_offset);
8316
8317 }
8318 else
8319 {
8320 asection *splt = htab->plt;
8321 if (!htab->elf.dynamic_sections_created
8322 || h->dynindx == -1)
8323 splt = htab->iplt;
8324
8325 rela.r_offset = (splt->output_section->vma
8326 + splt->output_offset
8327 + ent->plt.offset);
8328 if (htab->plt_type == PLT_OLD
8329 || !htab->elf.dynamic_sections_created
8330 || h->dynindx == -1)
8331 {
8332 /* We don't need to fill in the .plt. The ppc dynamic
8333 linker will fill it in. */
8334 }
8335 else
8336 {
8337 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8338 + htab->glink->output_section->vma
8339 + htab->glink->output_offset);
8340 bfd_put_32 (output_bfd, val,
8341 splt->contents + ent->plt.offset);
8342 }
8343 }
8344
8345 /* Fill in the entry in the .rela.plt section. */
8346 rela.r_addend = 0;
8347 if (!htab->elf.dynamic_sections_created
8348 || h->dynindx == -1)
8349 {
8350 BFD_ASSERT (h->type == STT_GNU_IFUNC
8351 && h->def_regular
8352 && (h->root.type == bfd_link_hash_defined
8353 || h->root.type == bfd_link_hash_defweak));
8354 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8355 rela.r_addend = SYM_VAL (h);
8356 }
8357 else
8358 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8359
8360 if (!htab->elf.dynamic_sections_created
8361 || h->dynindx == -1)
8362 loc = (htab->reliplt->contents
8363 + (htab->reliplt->reloc_count++
8364 * sizeof (Elf32_External_Rela)));
8365 else
8366 loc = (htab->relplt->contents
8367 + reloc_index * sizeof (Elf32_External_Rela));
8368 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8369
8370 if (!h->def_regular)
8371 {
8372 /* Mark the symbol as undefined, rather than as
8373 defined in the .plt section. Leave the value if
8374 there were any relocations where pointer equality
8375 matters (this is a clue for the dynamic linker, to
8376 make function pointer comparisons work between an
8377 application and shared library), otherwise set it
8378 to zero. */
8379 sym->st_shndx = SHN_UNDEF;
8380 if (!h->pointer_equality_needed)
8381 sym->st_value = 0;
8382 else if (!h->ref_regular_nonweak)
8383 {
8384 /* This breaks function pointer comparisons, but
8385 that is better than breaking tests for a NULL
8386 function pointer. */
8387 sym->st_value = 0;
8388 }
8389 }
8390 else if (h->type == STT_GNU_IFUNC
8391 && !info->shared)
8392 {
8393 /* Set the value of ifunc symbols in a non-pie
8394 executable to the glink entry. This is to avoid
8395 text relocations. We can't do this for ifunc in
8396 allocate_dynrelocs, as we do for normal dynamic
8397 function symbols with plt entries, because we need
8398 to keep the original value around for the ifunc
8399 relocation. */
8400 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8401 (output_bfd, htab->glink->output_section));
8402 sym->st_value = (ent->glink_offset +
8403 htab->glink->output_offset
8404 + htab->glink->output_section->vma);
8405 }
8406 doneone = TRUE;
8407 }
8408
8409 if (htab->plt_type == PLT_NEW
8410 || !htab->elf.dynamic_sections_created
8411 || h->dynindx == -1)
8412 {
8413 unsigned char *p;
8414 asection *splt = htab->plt;
8415 if (!htab->elf.dynamic_sections_created
8416 || h->dynindx == -1)
8417 splt = htab->iplt;
8418
8419 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8420
8421 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8422 {
8423 bfd_put_32 (output_bfd, LWZ_11_3, p);
8424 p += 4;
8425 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8426 p += 4;
8427 bfd_put_32 (output_bfd, MR_0_3, p);
8428 p += 4;
8429 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8430 p += 4;
8431 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8432 p += 4;
8433 bfd_put_32 (output_bfd, BEQLR, p);
8434 p += 4;
8435 bfd_put_32 (output_bfd, MR_3_0, p);
8436 p += 4;
8437 bfd_put_32 (output_bfd, NOP, p);
8438 p += 4;
8439 }
8440
8441 write_glink_stub (ent, splt, p, info);
8442
8443 if (!info->shared)
8444 /* We only need one non-PIC glink stub. */
8445 break;
8446 }
8447 else
8448 break;
8449 }
8450
8451 if (h->needs_copy)
8452 {
8453 asection *s;
8454 Elf_Internal_Rela rela;
8455 bfd_byte *loc;
8456
8457 /* This symbols needs a copy reloc. Set it up. */
8458
8459 #ifdef DEBUG
8460 fprintf (stderr, ", copy");
8461 #endif
8462
8463 BFD_ASSERT (h->dynindx != -1);
8464
8465 if (ppc_elf_hash_entry (h)->has_sda_refs)
8466 s = htab->relsbss;
8467 else
8468 s = htab->relbss;
8469 BFD_ASSERT (s != NULL);
8470
8471 rela.r_offset = SYM_VAL (h);
8472 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8473 rela.r_addend = 0;
8474 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8475 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8476 }
8477
8478 #ifdef DEBUG
8479 fprintf (stderr, "\n");
8480 #endif
8481
8482 /* Mark some specially defined symbols as absolute. */
8483 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8484 || (!htab->is_vxworks
8485 && (h == htab->elf.hgot
8486 || strcmp (h->root.root.string,
8487 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8488 sym->st_shndx = SHN_ABS;
8489
8490 return TRUE;
8491 }
8492 \f
8493 static enum elf_reloc_type_class
8494 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8495 {
8496 switch (ELF32_R_TYPE (rela->r_info))
8497 {
8498 case R_PPC_RELATIVE:
8499 return reloc_class_relative;
8500 case R_PPC_REL24:
8501 case R_PPC_ADDR24:
8502 case R_PPC_JMP_SLOT:
8503 return reloc_class_plt;
8504 case R_PPC_COPY:
8505 return reloc_class_copy;
8506 default:
8507 return reloc_class_normal;
8508 }
8509 }
8510 \f
8511 /* Finish up the dynamic sections. */
8512
8513 static bfd_boolean
8514 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8515 struct bfd_link_info *info)
8516 {
8517 asection *sdyn;
8518 asection *splt;
8519 struct ppc_elf_link_hash_table *htab;
8520 bfd_vma got;
8521 bfd *dynobj;
8522 bfd_boolean ret = TRUE;
8523
8524 #ifdef DEBUG
8525 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8526 #endif
8527
8528 htab = ppc_elf_hash_table (info);
8529 dynobj = elf_hash_table (info)->dynobj;
8530 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8531 if (htab->is_vxworks)
8532 splt = bfd_get_section_by_name (dynobj, ".plt");
8533 else
8534 splt = NULL;
8535
8536 got = 0;
8537 if (htab->elf.hgot != NULL)
8538 got = SYM_VAL (htab->elf.hgot);
8539
8540 if (htab->elf.dynamic_sections_created)
8541 {
8542 Elf32_External_Dyn *dyncon, *dynconend;
8543
8544 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8545
8546 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8547 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8548 for (; dyncon < dynconend; dyncon++)
8549 {
8550 Elf_Internal_Dyn dyn;
8551 asection *s;
8552
8553 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8554
8555 switch (dyn.d_tag)
8556 {
8557 case DT_PLTGOT:
8558 if (htab->is_vxworks)
8559 s = htab->sgotplt;
8560 else
8561 s = htab->plt;
8562 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8563 break;
8564
8565 case DT_PLTRELSZ:
8566 dyn.d_un.d_val = htab->relplt->size;
8567 break;
8568
8569 case DT_JMPREL:
8570 s = htab->relplt;
8571 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8572 break;
8573
8574 case DT_PPC_GOT:
8575 dyn.d_un.d_ptr = got;
8576 break;
8577
8578 case DT_RELASZ:
8579 if (htab->is_vxworks)
8580 {
8581 if (htab->relplt)
8582 dyn.d_un.d_ptr -= htab->relplt->size;
8583 break;
8584 }
8585 continue;
8586
8587 default:
8588 if (htab->is_vxworks
8589 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8590 break;
8591 continue;
8592 }
8593
8594 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8595 }
8596 }
8597
8598 if (htab->got != NULL)
8599 {
8600 if (htab->elf.hgot->root.u.def.section == htab->got
8601 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8602 {
8603 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8604
8605 p += htab->elf.hgot->root.u.def.value;
8606 if (htab->plt_type == PLT_OLD)
8607 {
8608 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8609 so that a function can easily find the address of
8610 _GLOBAL_OFFSET_TABLE_. */
8611 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8612 < htab->elf.hgot->root.u.def.section->size);
8613 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8614 }
8615
8616 if (sdyn != NULL)
8617 {
8618 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8619 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8620 < htab->elf.hgot->root.u.def.section->size);
8621 bfd_put_32 (output_bfd, val, p);
8622 }
8623 }
8624 else
8625 {
8626 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8627 htab->elf.hgot->root.root.string,
8628 (htab->sgotplt != NULL
8629 ? htab->sgotplt->name : htab->got->name));
8630 bfd_set_error (bfd_error_bad_value);
8631 ret = FALSE;
8632 }
8633
8634 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8635 }
8636
8637 /* Fill in the first entry in the VxWorks procedure linkage table. */
8638 if (splt && splt->size > 0)
8639 {
8640 /* Use the right PLT. */
8641 static const bfd_vma *plt_entry = NULL;
8642 plt_entry = info->shared ?
8643 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8644
8645 if (!info->shared)
8646 {
8647 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8648
8649 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8650 splt->contents + 0);
8651 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8652 splt->contents + 4);
8653 }
8654 else
8655 {
8656 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8657 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8658 }
8659 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8660 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8661 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8662 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8663 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8664 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8665
8666 if (! info->shared)
8667 {
8668 Elf_Internal_Rela rela;
8669 bfd_byte *loc;
8670
8671 loc = htab->srelplt2->contents;
8672
8673 /* Output the @ha relocation for the first instruction. */
8674 rela.r_offset = (htab->plt->output_section->vma
8675 + htab->plt->output_offset
8676 + 2);
8677 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8678 rela.r_addend = 0;
8679 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8680 loc += sizeof (Elf32_External_Rela);
8681
8682 /* Output the @l relocation for the second instruction. */
8683 rela.r_offset = (htab->plt->output_section->vma
8684 + htab->plt->output_offset
8685 + 6);
8686 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8687 rela.r_addend = 0;
8688 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8689 loc += sizeof (Elf32_External_Rela);
8690
8691 /* Fix up the remaining relocations. They may have the wrong
8692 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8693 in which symbols were output. */
8694 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8695 {
8696 Elf_Internal_Rela rel;
8697
8698 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8699 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8700 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8701 loc += sizeof (Elf32_External_Rela);
8702
8703 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8704 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8705 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8706 loc += sizeof (Elf32_External_Rela);
8707
8708 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8709 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8710 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8711 loc += sizeof (Elf32_External_Rela);
8712 }
8713 }
8714 }
8715
8716 if (htab->glink != NULL
8717 && htab->glink->contents != NULL
8718 && htab->elf.dynamic_sections_created)
8719 {
8720 unsigned char *p;
8721 unsigned char *endp;
8722 bfd_vma res0;
8723 unsigned int i;
8724
8725 /*
8726 * PIC glink code is the following:
8727 *
8728 * # ith PLT code stub.
8729 * addis 11,30,(plt+(i-1)*4-got)@ha
8730 * lwz 11,(plt+(i-1)*4-got)@l(11)
8731 * mtctr 11
8732 * bctr
8733 *
8734 * # A table of branches, one for each plt entry.
8735 * # The idea is that the plt call stub loads ctr and r11 with these
8736 * # addresses, so (r11 - res_0) gives the plt index * 4.
8737 * res_0: b PLTresolve
8738 * res_1: b PLTresolve
8739 * .
8740 * # Some number of entries towards the end can be nops
8741 * res_n_m3: nop
8742 * res_n_m2: nop
8743 * res_n_m1:
8744 *
8745 * PLTresolve:
8746 * addis 11,11,(1f-res_0)@ha
8747 * mflr 0
8748 * bcl 20,31,1f
8749 * 1: addi 11,11,(1b-res_0)@l
8750 * mflr 12
8751 * mtlr 0
8752 * sub 11,11,12 # r11 = index * 4
8753 * addis 12,12,(got+4-1b)@ha
8754 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8755 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8756 * mtctr 0
8757 * add 0,11,11
8758 * add 11,0,11 # r11 = index * 12 = reloc offset.
8759 * bctr
8760 */
8761 static const unsigned int pic_plt_resolve[] =
8762 {
8763 ADDIS_11_11,
8764 MFLR_0,
8765 BCL_20_31,
8766 ADDI_11_11,
8767 MFLR_12,
8768 MTLR_0,
8769 SUB_11_11_12,
8770 ADDIS_12_12,
8771 LWZ_0_12,
8772 LWZ_12_12,
8773 MTCTR_0,
8774 ADD_0_11_11,
8775 ADD_11_0_11,
8776 BCTR,
8777 NOP,
8778 NOP
8779 };
8780
8781 /*
8782 * Non-PIC glink code is a little simpler.
8783 *
8784 * # ith PLT code stub.
8785 * lis 11,(plt+(i-1)*4)@ha
8786 * lwz 11,(plt+(i-1)*4)@l(11)
8787 * mtctr 11
8788 * bctr
8789 *
8790 * The branch table is the same, then comes
8791 *
8792 * PLTresolve:
8793 * lis 12,(got+4)@ha
8794 * addis 11,11,(-res_0)@ha
8795 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8796 * addi 11,11,(-res_0)@l # r11 = index * 4
8797 * mtctr 0
8798 * add 0,11,11
8799 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8800 * add 11,0,11 # r11 = index * 12 = reloc offset.
8801 * bctr
8802 */
8803 static const unsigned int plt_resolve[] =
8804 {
8805 LIS_12,
8806 ADDIS_11_11,
8807 LWZ_0_12,
8808 ADDI_11_11,
8809 MTCTR_0,
8810 ADD_0_11_11,
8811 LWZ_12_12,
8812 ADD_11_0_11,
8813 BCTR,
8814 NOP,
8815 NOP,
8816 NOP,
8817 NOP,
8818 NOP,
8819 NOP,
8820 NOP
8821 };
8822
8823 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8824 abort ();
8825 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8826 abort ();
8827
8828 /* Build the branch table, one for each plt entry (less one),
8829 and perhaps some padding. */
8830 p = htab->glink->contents;
8831 p += htab->glink_pltresolve;
8832 endp = htab->glink->contents;
8833 endp += htab->glink->size - GLINK_PLTRESOLVE;
8834 while (p < endp - 8 * 4)
8835 {
8836 bfd_put_32 (output_bfd, B + endp - p, p);
8837 p += 4;
8838 }
8839 while (p < endp)
8840 {
8841 bfd_put_32 (output_bfd, NOP, p);
8842 p += 4;
8843 }
8844
8845 res0 = (htab->glink_pltresolve
8846 + htab->glink->output_section->vma
8847 + htab->glink->output_offset);
8848
8849 /* Last comes the PLTresolve stub. */
8850 if (info->shared)
8851 {
8852 bfd_vma bcl;
8853
8854 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8855 {
8856 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8857 p += 4;
8858 }
8859 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8860
8861 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8862 + htab->glink->output_section->vma
8863 + htab->glink->output_offset);
8864
8865 bfd_put_32 (output_bfd,
8866 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8867 bfd_put_32 (output_bfd,
8868 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8869 bfd_put_32 (output_bfd,
8870 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8871 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8872 {
8873 bfd_put_32 (output_bfd,
8874 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8875 bfd_put_32 (output_bfd,
8876 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8877 }
8878 else
8879 {
8880 bfd_put_32 (output_bfd,
8881 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8882 bfd_put_32 (output_bfd,
8883 LWZ_12_12 + 4, p + 9*4);
8884 }
8885 }
8886 else
8887 {
8888 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8889 {
8890 bfd_put_32 (output_bfd, plt_resolve[i], p);
8891 p += 4;
8892 }
8893 p -= 4 * ARRAY_SIZE (plt_resolve);
8894
8895 bfd_put_32 (output_bfd,
8896 LIS_12 + PPC_HA (got + 4), p + 0*4);
8897 bfd_put_32 (output_bfd,
8898 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8899 bfd_put_32 (output_bfd,
8900 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8901 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8902 {
8903 bfd_put_32 (output_bfd,
8904 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8905 bfd_put_32 (output_bfd,
8906 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8907 }
8908 else
8909 {
8910 bfd_put_32 (output_bfd,
8911 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8912 bfd_put_32 (output_bfd,
8913 LWZ_12_12 + 4, p + 6*4);
8914 }
8915 }
8916 }
8917
8918 return ret;
8919 }
8920 \f
8921 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8922 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8923 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8924 #define TARGET_BIG_NAME "elf32-powerpc"
8925 #define ELF_ARCH bfd_arch_powerpc
8926 #define ELF_MACHINE_CODE EM_PPC
8927 #ifdef __QNXTARGET__
8928 #define ELF_MAXPAGESIZE 0x1000
8929 #else
8930 #define ELF_MAXPAGESIZE 0x10000
8931 #endif
8932 #define ELF_MINPAGESIZE 0x1000
8933 #define ELF_COMMONPAGESIZE 0x1000
8934 #define elf_info_to_howto ppc_elf_info_to_howto
8935
8936 #ifdef EM_CYGNUS_POWERPC
8937 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8938 #endif
8939
8940 #ifdef EM_PPC_OLD
8941 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8942 #endif
8943
8944 #define elf_backend_plt_not_loaded 1
8945 #define elf_backend_can_gc_sections 1
8946 #define elf_backend_can_refcount 1
8947 #define elf_backend_rela_normal 1
8948
8949 #define bfd_elf32_mkobject ppc_elf_mkobject
8950 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8951 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8952 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8953 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8954 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8955 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8956 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8957
8958 #define elf_backend_object_p ppc_elf_object_p
8959 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8960 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8961 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8962 #define elf_backend_relocate_section ppc_elf_relocate_section
8963 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8964 #define elf_backend_check_relocs ppc_elf_check_relocs
8965 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8966 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8967 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8968 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8969 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8970 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8971 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8972 #define elf_backend_fake_sections ppc_elf_fake_sections
8973 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8974 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8975 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8976 #define elf_backend_write_core_note ppc_elf_write_core_note
8977 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8978 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8979 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8980 #define elf_backend_write_section ppc_elf_write_section
8981 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8982 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8983 #define elf_backend_action_discarded ppc_elf_action_discarded
8984 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8985 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8986
8987 #include "elf32-target.h"
8988
8989 /* VxWorks Target */
8990
8991 #undef TARGET_LITTLE_SYM
8992 #undef TARGET_LITTLE_NAME
8993
8994 #undef TARGET_BIG_SYM
8995 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8996 #undef TARGET_BIG_NAME
8997 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8998
8999 /* VxWorks uses the elf default section flags for .plt. */
9000 static const struct bfd_elf_special_section *
9001 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9002 {
9003 if (sec->name == NULL)
9004 return NULL;
9005
9006 if (strcmp (sec->name, ".plt") == 0)
9007 return _bfd_elf_get_sec_type_attr (abfd, sec);
9008
9009 return ppc_elf_get_sec_type_attr (abfd, sec);
9010 }
9011
9012 /* Like ppc_elf_link_hash_table_create, but overrides
9013 appropriately for VxWorks. */
9014 static struct bfd_link_hash_table *
9015 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9016 {
9017 struct bfd_link_hash_table *ret;
9018
9019 ret = ppc_elf_link_hash_table_create (abfd);
9020 if (ret)
9021 {
9022 struct ppc_elf_link_hash_table *htab
9023 = (struct ppc_elf_link_hash_table *)ret;
9024 htab->is_vxworks = 1;
9025 htab->plt_type = PLT_VXWORKS;
9026 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9027 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9028 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9029 }
9030 return ret;
9031 }
9032
9033 /* Tweak magic VxWorks symbols as they are loaded. */
9034 static bfd_boolean
9035 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9036 struct bfd_link_info *info,
9037 Elf_Internal_Sym *sym,
9038 const char **namep ATTRIBUTE_UNUSED,
9039 flagword *flagsp ATTRIBUTE_UNUSED,
9040 asection **secp,
9041 bfd_vma *valp)
9042 {
9043 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9044 valp))
9045 return FALSE;
9046
9047 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9048 }
9049
9050 static void
9051 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9052 {
9053 ppc_elf_final_write_processing(abfd, linker);
9054 elf_vxworks_final_write_processing(abfd, linker);
9055 }
9056
9057 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9058 define it. */
9059 #undef elf_backend_want_plt_sym
9060 #define elf_backend_want_plt_sym 1
9061 #undef elf_backend_want_got_plt
9062 #define elf_backend_want_got_plt 1
9063 #undef elf_backend_got_symbol_offset
9064 #define elf_backend_got_symbol_offset 0
9065 #undef elf_backend_plt_not_loaded
9066 #define elf_backend_plt_not_loaded 0
9067 #undef elf_backend_plt_readonly
9068 #define elf_backend_plt_readonly 1
9069 #undef elf_backend_got_header_size
9070 #define elf_backend_got_header_size 12
9071
9072 #undef bfd_elf32_get_synthetic_symtab
9073
9074 #undef bfd_elf32_bfd_link_hash_table_create
9075 #define bfd_elf32_bfd_link_hash_table_create \
9076 ppc_elf_vxworks_link_hash_table_create
9077 #undef elf_backend_add_symbol_hook
9078 #define elf_backend_add_symbol_hook \
9079 ppc_elf_vxworks_add_symbol_hook
9080 #undef elf_backend_link_output_symbol_hook
9081 #define elf_backend_link_output_symbol_hook \
9082 elf_vxworks_link_output_symbol_hook
9083 #undef elf_backend_final_write_processing
9084 #define elf_backend_final_write_processing \
9085 ppc_elf_vxworks_final_write_processing
9086 #undef elf_backend_get_sec_type_attr
9087 #define elf_backend_get_sec_type_attr \
9088 ppc_elf_vxworks_get_sec_type_attr
9089 #undef elf_backend_emit_relocs
9090 #define elf_backend_emit_relocs \
9091 elf_vxworks_emit_relocs
9092
9093 #undef elf32_bed
9094 #define elf32_bed ppc_elf_vxworks_bed
9095 #undef elf_backend_post_process_headers
9096
9097 #include "elf32-target.h"
GDB Binutils - Deliverables
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