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* elf-bfd.h (emum elf_object_id): Rename to elf_target_id. Add
[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 TRUE, /* 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_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1998 shdr->sh_flags |= SHF_EXCLUDE;
1999
2000 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2001 shdr->sh_type = SHT_ORDERED;
2002
2003 return TRUE;
2004 }
2005
2006 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2007 need to bump up the number of section headers. */
2008
2009 static int
2010 ppc_elf_additional_program_headers (bfd *abfd,
2011 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2012 {
2013 asection *s;
2014 int ret = 0;
2015
2016 s = bfd_get_section_by_name (abfd, ".sbss2");
2017 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2018 ++ret;
2019
2020 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2021 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2022 ++ret;
2023
2024 return ret;
2025 }
2026
2027 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2028 .PPC.EMB.sbss0 a normal section, and not a bss section so
2029 that the linker doesn't crater when trying to make more than
2030 2 sections. */
2031
2032 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2033 {
2034 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2035 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2036 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2037 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2038 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2039 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2040 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2041 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2042 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2043 { NULL, 0, 0, 0, 0 }
2044 };
2045
2046 /* This is what we want for new plt/got. */
2047 static struct bfd_elf_special_section ppc_alt_plt =
2048 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2049
2050 static const struct bfd_elf_special_section *
2051 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2052 {
2053 const struct bfd_elf_special_section *ssect;
2054
2055 /* See if this is one of the special sections. */
2056 if (sec->name == NULL)
2057 return NULL;
2058
2059 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2060 sec->use_rela_p);
2061 if (ssect != NULL)
2062 {
2063 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2064 ssect = &ppc_alt_plt;
2065 return ssect;
2066 }
2067
2068 return _bfd_elf_get_sec_type_attr (abfd, sec);
2069 }
2070 \f
2071 /* Very simple linked list structure for recording apuinfo values. */
2072 typedef struct apuinfo_list
2073 {
2074 struct apuinfo_list *next;
2075 unsigned long value;
2076 }
2077 apuinfo_list;
2078
2079 static apuinfo_list *head;
2080
2081
2082 static void
2083 apuinfo_list_init (void)
2084 {
2085 head = NULL;
2086 }
2087
2088 static void
2089 apuinfo_list_add (unsigned long value)
2090 {
2091 apuinfo_list *entry = head;
2092
2093 while (entry != NULL)
2094 {
2095 if (entry->value == value)
2096 return;
2097 entry = entry->next;
2098 }
2099
2100 entry = bfd_malloc (sizeof (* entry));
2101 if (entry == NULL)
2102 return;
2103
2104 entry->value = value;
2105 entry->next = head;
2106 head = entry;
2107 }
2108
2109 static unsigned
2110 apuinfo_list_length (void)
2111 {
2112 apuinfo_list *entry;
2113 unsigned long count;
2114
2115 for (entry = head, count = 0;
2116 entry;
2117 entry = entry->next)
2118 ++ count;
2119
2120 return count;
2121 }
2122
2123 static inline unsigned long
2124 apuinfo_list_element (unsigned long number)
2125 {
2126 apuinfo_list * entry;
2127
2128 for (entry = head;
2129 entry && number --;
2130 entry = entry->next)
2131 ;
2132
2133 return entry ? entry->value : 0;
2134 }
2135
2136 static void
2137 apuinfo_list_finish (void)
2138 {
2139 apuinfo_list *entry;
2140
2141 for (entry = head; entry;)
2142 {
2143 apuinfo_list *next = entry->next;
2144 free (entry);
2145 entry = next;
2146 }
2147
2148 head = NULL;
2149 }
2150
2151 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2152 #define APUINFO_LABEL "APUinfo"
2153
2154 /* Scan the input BFDs and create a linked list of
2155 the APUinfo values that will need to be emitted. */
2156
2157 static void
2158 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2159 {
2160 bfd *ibfd;
2161 asection *asec;
2162 char *buffer;
2163 unsigned num_input_sections;
2164 bfd_size_type output_section_size;
2165 unsigned i;
2166 unsigned num_entries;
2167 unsigned long offset;
2168 unsigned long length;
2169 const char *error_message = NULL;
2170
2171 if (link_info == NULL)
2172 return;
2173
2174 /* Scan the input bfds, looking for apuinfo sections. */
2175 num_input_sections = 0;
2176 output_section_size = 0;
2177
2178 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2179 {
2180 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2181 if (asec)
2182 {
2183 ++ num_input_sections;
2184 output_section_size += asec->size;
2185 }
2186 }
2187
2188 /* We need at least one input sections
2189 in order to make merging worthwhile. */
2190 if (num_input_sections < 1)
2191 return;
2192
2193 /* Just make sure that the output section exists as well. */
2194 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2195 if (asec == NULL)
2196 return;
2197
2198 /* Allocate a buffer for the contents of the input sections. */
2199 buffer = bfd_malloc (output_section_size);
2200 if (buffer == NULL)
2201 return;
2202
2203 offset = 0;
2204 apuinfo_list_init ();
2205
2206 /* Read in the input sections contents. */
2207 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2208 {
2209 unsigned long datum;
2210 char *ptr;
2211
2212 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2213 if (asec == NULL)
2214 continue;
2215
2216 length = asec->size;
2217 if (length < 24)
2218 {
2219 error_message = _("corrupt or empty %s section in %B");
2220 goto fail;
2221 }
2222
2223 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2224 || (bfd_bread (buffer + offset, length, ibfd) != length))
2225 {
2226 error_message = _("unable to read in %s section from %B");
2227 goto fail;
2228 }
2229
2230 /* Process the contents of the section. */
2231 ptr = buffer + offset;
2232 error_message = _("corrupt %s section in %B");
2233
2234 /* Verify the contents of the header. Note - we have to
2235 extract the values this way in order to allow for a
2236 host whose endian-ness is different from the target. */
2237 datum = bfd_get_32 (ibfd, ptr);
2238 if (datum != sizeof APUINFO_LABEL)
2239 goto fail;
2240
2241 datum = bfd_get_32 (ibfd, ptr + 8);
2242 if (datum != 0x2)
2243 goto fail;
2244
2245 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2246 goto fail;
2247
2248 /* Get the number of bytes used for apuinfo entries. */
2249 datum = bfd_get_32 (ibfd, ptr + 4);
2250 if (datum + 20 != length)
2251 goto fail;
2252
2253 /* Make sure that we do not run off the end of the section. */
2254 if (offset + length > output_section_size)
2255 goto fail;
2256
2257 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2258 for (i = 0; i < datum; i += 4)
2259 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2260
2261 /* Update the offset. */
2262 offset += length;
2263 }
2264
2265 error_message = NULL;
2266
2267 /* Compute the size of the output section. */
2268 num_entries = apuinfo_list_length ();
2269 output_section_size = 20 + num_entries * 4;
2270
2271 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2272
2273 if (! bfd_set_section_size (abfd, asec, output_section_size))
2274 ibfd = abfd,
2275 error_message = _("warning: unable to set size of %s section in %B");
2276
2277 fail:
2278 free (buffer);
2279
2280 if (error_message)
2281 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2282 }
2283
2284 /* Prevent the output section from accumulating the input sections'
2285 contents. We have already stored this in our linked list structure. */
2286
2287 static bfd_boolean
2288 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2289 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2290 asection *asec,
2291 bfd_byte *contents ATTRIBUTE_UNUSED)
2292 {
2293 return (apuinfo_list_length ()
2294 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2295 }
2296
2297 /* Finally we can generate the output section. */
2298
2299 static void
2300 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2301 {
2302 bfd_byte *buffer;
2303 asection *asec;
2304 unsigned i;
2305 unsigned num_entries;
2306 bfd_size_type length;
2307
2308 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2309 if (asec == NULL)
2310 return;
2311
2312 if (apuinfo_list_length () == 0)
2313 return;
2314
2315 length = asec->size;
2316 if (length < 20)
2317 return;
2318
2319 buffer = bfd_malloc (length);
2320 if (buffer == NULL)
2321 {
2322 (*_bfd_error_handler)
2323 (_("failed to allocate space for new APUinfo section."));
2324 return;
2325 }
2326
2327 /* Create the apuinfo header. */
2328 num_entries = apuinfo_list_length ();
2329 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2330 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2331 bfd_put_32 (abfd, 0x2, buffer + 8);
2332 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2333
2334 length = 20;
2335 for (i = 0; i < num_entries; i++)
2336 {
2337 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2338 length += 4;
2339 }
2340
2341 if (length != asec->size)
2342 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2343
2344 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2345 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2346
2347 free (buffer);
2348
2349 apuinfo_list_finish ();
2350 }
2351 \f
2352 static bfd_boolean
2353 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2354 {
2355 bfd_byte buf[GLINK_ENTRY_SIZE];
2356
2357 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2358 return FALSE;
2359
2360 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2361 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2362 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2363 && bfd_get_32 (abfd, buf + 12) == BCTR);
2364 }
2365
2366 static bfd_boolean
2367 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2368 {
2369 bfd_vma vma = *(bfd_vma *) ptr;
2370 return ((section->flags & SEC_ALLOC) != 0
2371 && section->vma <= vma
2372 && vma < section->vma + section->size);
2373 }
2374
2375 static long
2376 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2377 long dynsymcount, asymbol **dynsyms,
2378 asymbol **ret)
2379 {
2380 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2381 asection *plt, *relplt, *dynamic, *glink;
2382 bfd_vma glink_vma = 0;
2383 bfd_vma resolv_vma = 0;
2384 bfd_vma stub_vma;
2385 asymbol *s;
2386 arelent *p;
2387 long count, i;
2388 size_t size;
2389 char *names;
2390 bfd_byte buf[4];
2391
2392 *ret = NULL;
2393
2394 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2395 return 0;
2396
2397 if (dynsymcount <= 0)
2398 return 0;
2399
2400 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2401 if (relplt == NULL)
2402 return 0;
2403
2404 plt = bfd_get_section_by_name (abfd, ".plt");
2405 if (plt == NULL)
2406 return 0;
2407
2408 /* Call common code to handle old-style executable PLTs. */
2409 if (elf_section_flags (plt) & SHF_EXECINSTR)
2410 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2411 dynsymcount, dynsyms, ret);
2412
2413 /* If this object was prelinked, the prelinker stored the address
2414 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2415 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2416 if (dynamic != NULL)
2417 {
2418 bfd_byte *dynbuf, *extdyn, *extdynend;
2419 size_t extdynsize;
2420 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2421
2422 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2423 return -1;
2424
2425 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2426 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2427
2428 extdyn = dynbuf;
2429 extdynend = extdyn + dynamic->size;
2430 for (; extdyn < extdynend; extdyn += extdynsize)
2431 {
2432 Elf_Internal_Dyn dyn;
2433 (*swap_dyn_in) (abfd, extdyn, &dyn);
2434
2435 if (dyn.d_tag == DT_NULL)
2436 break;
2437
2438 if (dyn.d_tag == DT_PPC_GOT)
2439 {
2440 unsigned int g_o_t = dyn.d_un.d_val;
2441 asection *got = bfd_get_section_by_name (abfd, ".got");
2442 if (got != NULL
2443 && bfd_get_section_contents (abfd, got, buf,
2444 g_o_t - got->vma + 4, 4))
2445 glink_vma = bfd_get_32 (abfd, buf);
2446 break;
2447 }
2448 }
2449 free (dynbuf);
2450 }
2451
2452 /* Otherwise we read the first plt entry. */
2453 if (glink_vma == 0)
2454 {
2455 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2456 glink_vma = bfd_get_32 (abfd, buf);
2457 }
2458
2459 if (glink_vma == 0)
2460 return 0;
2461
2462 /* The .glink section usually does not survive the final
2463 link; search for the section (usually .text) where the
2464 glink stubs now reside. */
2465 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2466 if (glink == NULL)
2467 return 0;
2468
2469 /* Determine glink PLT resolver by reading the relative branch
2470 from the first glink stub. */
2471 if (bfd_get_section_contents (abfd, glink, buf,
2472 glink_vma - glink->vma, 4))
2473 {
2474 unsigned int insn = bfd_get_32 (abfd, buf);
2475
2476 /* The first glink stub may either branch to the resolver ... */
2477 insn ^= B;
2478 if ((insn & ~0x3fffffc) == 0)
2479 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2480
2481 /* ... or fall through a bunch of NOPs. */
2482 else if ((insn ^ B ^ NOP) == 0)
2483 for (i = 4;
2484 bfd_get_section_contents (abfd, glink, buf,
2485 glink_vma - glink->vma + i, 4);
2486 i += 4)
2487 if (bfd_get_32 (abfd, buf) != NOP)
2488 {
2489 resolv_vma = glink_vma + i;
2490 break;
2491 }
2492 }
2493
2494 count = relplt->size / sizeof (Elf32_External_Rela);
2495 stub_vma = glink_vma - (bfd_vma) count * 16;
2496 /* If the stubs are those for -shared/-pie then we might have
2497 multiple stubs for each plt entry. If that is the case then
2498 there is no way to associate stubs with their plt entries short
2499 of figuring out the GOT pointer value used in the stub. */
2500 if (!is_nonpic_glink_stub (abfd, glink,
2501 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2502 return 0;
2503
2504 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2505 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2506 return -1;
2507
2508 size = count * sizeof (asymbol);
2509 p = relplt->relocation;
2510 for (i = 0; i < count; i++, p++)
2511 {
2512 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2513 if (p->addend != 0)
2514 size += sizeof ("+0x") - 1 + 8;
2515 }
2516
2517 size += sizeof (asymbol) + sizeof ("__glink");
2518
2519 if (resolv_vma)
2520 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2521
2522 s = *ret = bfd_malloc (size);
2523 if (s == NULL)
2524 return -1;
2525
2526 names = (char *) (s + count + 1 + (resolv_vma != 0));
2527 p = relplt->relocation;
2528 for (i = 0; i < count; i++, p++)
2529 {
2530 size_t len;
2531
2532 *s = **p->sym_ptr_ptr;
2533 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2534 we are defining a symbol, ensure one of them is set. */
2535 if ((s->flags & BSF_LOCAL) == 0)
2536 s->flags |= BSF_GLOBAL;
2537 s->flags |= BSF_SYNTHETIC;
2538 s->section = glink;
2539 s->value = stub_vma - glink->vma;
2540 s->name = names;
2541 s->udata.p = NULL;
2542 len = strlen ((*p->sym_ptr_ptr)->name);
2543 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2544 names += len;
2545 if (p->addend != 0)
2546 {
2547 memcpy (names, "+0x", sizeof ("+0x") - 1);
2548 names += sizeof ("+0x") - 1;
2549 bfd_sprintf_vma (abfd, names, p->addend);
2550 names += strlen (names);
2551 }
2552 memcpy (names, "@plt", sizeof ("@plt"));
2553 names += sizeof ("@plt");
2554 ++s;
2555 stub_vma += 16;
2556 }
2557
2558 /* Add a symbol at the start of the glink branch table. */
2559 memset (s, 0, sizeof *s);
2560 s->the_bfd = abfd;
2561 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2562 s->section = glink;
2563 s->value = glink_vma - glink->vma;
2564 s->name = names;
2565 memcpy (names, "__glink", sizeof ("__glink"));
2566 names += sizeof ("__glink");
2567 s++;
2568 count++;
2569
2570 if (resolv_vma)
2571 {
2572 /* Add a symbol for the glink PLT resolver. */
2573 memset (s, 0, sizeof *s);
2574 s->the_bfd = abfd;
2575 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2576 s->section = glink;
2577 s->value = resolv_vma - glink->vma;
2578 s->name = names;
2579 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2580 names += sizeof ("__glink_PLTresolve");
2581 s++;
2582 count++;
2583 }
2584
2585 return count;
2586 }
2587 \f
2588 /* The following functions are specific to the ELF linker, while
2589 functions above are used generally. They appear in this file more
2590 or less in the order in which they are called. eg.
2591 ppc_elf_check_relocs is called early in the link process,
2592 ppc_elf_finish_dynamic_sections is one of the last functions
2593 called. */
2594
2595 /* The PPC linker needs to keep track of the number of relocs that it
2596 decides to copy as dynamic relocs in check_relocs for each symbol.
2597 This is so that it can later discard them if they are found to be
2598 unnecessary. We store the information in a field extending the
2599 regular ELF linker hash table. */
2600
2601 struct ppc_elf_dyn_relocs
2602 {
2603 struct ppc_elf_dyn_relocs *next;
2604
2605 /* The input section of the reloc. */
2606 asection *sec;
2607
2608 /* Total number of relocs copied for the input section. */
2609 bfd_size_type count;
2610
2611 /* Number of pc-relative relocs copied for the input section. */
2612 bfd_size_type pc_count;
2613 };
2614
2615 /* Track PLT entries needed for a given symbol. We might need more
2616 than one glink entry per symbol when generating a pic binary. */
2617 struct plt_entry
2618 {
2619 struct plt_entry *next;
2620
2621 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2622 This field stores the offset into .got2 used to initialise the
2623 GOT pointer reg. It will always be at least 32768. (Current
2624 gcc always uses an offset of 32768, but ld -r will pack .got2
2625 sections together resulting in larger offsets). */
2626 bfd_vma addend;
2627
2628 /* The .got2 section. */
2629 asection *sec;
2630
2631 /* PLT refcount or offset. */
2632 union
2633 {
2634 bfd_signed_vma refcount;
2635 bfd_vma offset;
2636 } plt;
2637
2638 /* .glink stub offset. */
2639 bfd_vma glink_offset;
2640 };
2641
2642 /* Of those relocs that might be copied as dynamic relocs, this function
2643 selects those that must be copied when linking a shared library,
2644 even when the symbol is local. */
2645
2646 static int
2647 must_be_dyn_reloc (struct bfd_link_info *info,
2648 enum elf_ppc_reloc_type r_type)
2649 {
2650 switch (r_type)
2651 {
2652 default:
2653 return 1;
2654
2655 case R_PPC_REL24:
2656 case R_PPC_REL14:
2657 case R_PPC_REL14_BRTAKEN:
2658 case R_PPC_REL14_BRNTAKEN:
2659 case R_PPC_REL32:
2660 return 0;
2661
2662 case R_PPC_TPREL32:
2663 case R_PPC_TPREL16:
2664 case R_PPC_TPREL16_LO:
2665 case R_PPC_TPREL16_HI:
2666 case R_PPC_TPREL16_HA:
2667 return !info->executable;
2668 }
2669 }
2670
2671 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2672 copying dynamic variables from a shared lib into an app's dynbss
2673 section, and instead use a dynamic relocation to point into the
2674 shared lib. */
2675 #define ELIMINATE_COPY_RELOCS 1
2676
2677 /* PPC ELF linker hash entry. */
2678
2679 struct ppc_elf_link_hash_entry
2680 {
2681 struct elf_link_hash_entry elf;
2682
2683 /* If this symbol is used in the linker created sections, the processor
2684 specific backend uses this field to map the field into the offset
2685 from the beginning of the section. */
2686 elf_linker_section_pointers_t *linker_section_pointer;
2687
2688 /* Track dynamic relocs copied for this symbol. */
2689 struct ppc_elf_dyn_relocs *dyn_relocs;
2690
2691 /* Contexts in which symbol is used in the GOT (or TOC).
2692 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2693 corresponding relocs are encountered during check_relocs.
2694 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2695 indicate the corresponding GOT entry type is not needed. */
2696 #define TLS_GD 1 /* GD reloc. */
2697 #define TLS_LD 2 /* LD reloc. */
2698 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2699 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2700 #define TLS_TLS 16 /* Any TLS reloc. */
2701 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2702 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2703 char tls_mask;
2704
2705 /* Nonzero if we have seen a small data relocation referring to this
2706 symbol. */
2707 unsigned char has_sda_refs;
2708 };
2709
2710 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2711
2712 /* PPC ELF linker hash table. */
2713
2714 struct ppc_elf_link_hash_table
2715 {
2716 struct elf_link_hash_table elf;
2717
2718 /* Short-cuts to get to dynamic linker sections. */
2719 asection *got;
2720 asection *relgot;
2721 asection *glink;
2722 asection *plt;
2723 asection *relplt;
2724 asection *iplt;
2725 asection *reliplt;
2726 asection *dynbss;
2727 asection *relbss;
2728 asection *dynsbss;
2729 asection *relsbss;
2730 elf_linker_section_t sdata[2];
2731 asection *sbss;
2732
2733 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2734 asection *srelplt2;
2735
2736 /* The .got.plt section (VxWorks only)*/
2737 asection *sgotplt;
2738
2739 /* Shortcut to __tls_get_addr. */
2740 struct elf_link_hash_entry *tls_get_addr;
2741
2742 /* The bfd that forced an old-style PLT. */
2743 bfd *old_bfd;
2744
2745 /* TLS local dynamic got entry handling. */
2746 union {
2747 bfd_signed_vma refcount;
2748 bfd_vma offset;
2749 } tlsld_got;
2750
2751 /* Offset of branch table to PltResolve function in glink. */
2752 bfd_vma glink_pltresolve;
2753
2754 /* Size of reserved GOT entries. */
2755 unsigned int got_header_size;
2756 /* Non-zero if allocating the header left a gap. */
2757 unsigned int got_gap;
2758
2759 /* The type of PLT we have chosen to use. */
2760 enum ppc_elf_plt_type plt_type;
2761
2762 /* Set if we should emit symbols for stubs. */
2763 unsigned int emit_stub_syms:1;
2764
2765 /* Set if __tls_get_addr optimization should not be done. */
2766 unsigned int no_tls_get_addr_opt:1;
2767
2768 /* True if the target system is VxWorks. */
2769 unsigned int is_vxworks:1;
2770
2771 /* The size of PLT entries. */
2772 int plt_entry_size;
2773 /* The distance between adjacent PLT slots. */
2774 int plt_slot_size;
2775 /* The size of the first PLT entry. */
2776 int plt_initial_entry_size;
2777
2778 /* Small local sym cache. */
2779 struct sym_cache sym_cache;
2780 };
2781
2782 /* Get the PPC ELF linker hash table from a link_info structure. */
2783
2784 #define ppc_elf_hash_table(p) \
2785 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2786 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2787
2788 /* Create an entry in a PPC ELF linker hash table. */
2789
2790 static struct bfd_hash_entry *
2791 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2792 struct bfd_hash_table *table,
2793 const char *string)
2794 {
2795 /* Allocate the structure if it has not already been allocated by a
2796 subclass. */
2797 if (entry == NULL)
2798 {
2799 entry = bfd_hash_allocate (table,
2800 sizeof (struct ppc_elf_link_hash_entry));
2801 if (entry == NULL)
2802 return entry;
2803 }
2804
2805 /* Call the allocation method of the superclass. */
2806 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2807 if (entry != NULL)
2808 {
2809 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2810 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2811 ppc_elf_hash_entry (entry)->tls_mask = 0;
2812 }
2813
2814 return entry;
2815 }
2816
2817 /* Create a PPC ELF linker hash table. */
2818
2819 static struct bfd_link_hash_table *
2820 ppc_elf_link_hash_table_create (bfd *abfd)
2821 {
2822 struct ppc_elf_link_hash_table *ret;
2823
2824 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2825 if (ret == NULL)
2826 return NULL;
2827
2828 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2829 ppc_elf_link_hash_newfunc,
2830 sizeof (struct ppc_elf_link_hash_entry),
2831 PPC32_ELF_DATA))
2832 {
2833 free (ret);
2834 return NULL;
2835 }
2836
2837 ret->elf.init_plt_refcount.refcount = 0;
2838 ret->elf.init_plt_refcount.glist = NULL;
2839 ret->elf.init_plt_offset.offset = 0;
2840 ret->elf.init_plt_offset.glist = NULL;
2841
2842 ret->sdata[0].name = ".sdata";
2843 ret->sdata[0].sym_name = "_SDA_BASE_";
2844 ret->sdata[0].bss_name = ".sbss";
2845
2846 ret->sdata[1].name = ".sdata2";
2847 ret->sdata[1].sym_name = "_SDA2_BASE_";
2848 ret->sdata[1].bss_name = ".sbss2";
2849
2850 ret->plt_entry_size = 12;
2851 ret->plt_slot_size = 8;
2852 ret->plt_initial_entry_size = 72;
2853
2854 return &ret->elf.root;
2855 }
2856
2857 /* Create .got and the related sections. */
2858
2859 static bfd_boolean
2860 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2861 {
2862 struct ppc_elf_link_hash_table *htab;
2863 asection *s;
2864 flagword flags;
2865
2866 if (!_bfd_elf_create_got_section (abfd, info))
2867 return FALSE;
2868
2869 htab = ppc_elf_hash_table (info);
2870 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2871 if (s == NULL)
2872 abort ();
2873
2874 if (htab->is_vxworks)
2875 {
2876 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2877 if (!htab->sgotplt)
2878 abort ();
2879 }
2880 else
2881 {
2882 /* The powerpc .got has a blrl instruction in it. Mark it
2883 executable. */
2884 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2885 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2886 if (!bfd_set_section_flags (abfd, s, flags))
2887 return FALSE;
2888 }
2889
2890 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2891 if (!htab->relgot)
2892 abort ();
2893
2894 return TRUE;
2895 }
2896
2897 static bfd_boolean
2898 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2899 {
2900 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2901 asection *s;
2902 flagword flags;
2903
2904 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2905 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2906 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2907 htab->glink = s;
2908 if (s == NULL
2909 || !bfd_set_section_alignment (abfd, s, 4))
2910 return FALSE;
2911
2912 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2913 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2914 htab->iplt = s;
2915 if (s == NULL
2916 || !bfd_set_section_alignment (abfd, s, 4))
2917 return FALSE;
2918
2919 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2920 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2921 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2922 htab->reliplt = s;
2923 if (s == NULL
2924 || ! bfd_set_section_alignment (abfd, s, 2))
2925 return FALSE;
2926 return TRUE;
2927 }
2928
2929 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2930 to output sections (just like _bfd_elf_create_dynamic_sections has
2931 to create .dynbss and .rela.bss). */
2932
2933 static bfd_boolean
2934 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2935 {
2936 struct ppc_elf_link_hash_table *htab;
2937 asection *s;
2938 flagword flags;
2939
2940 htab = ppc_elf_hash_table (info);
2941
2942 if (htab->got == NULL
2943 && !ppc_elf_create_got (abfd, info))
2944 return FALSE;
2945
2946 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2947 return FALSE;
2948
2949 if (htab->glink == NULL
2950 && !ppc_elf_create_glink (abfd, info))
2951 return FALSE;
2952
2953 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2954 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2955 SEC_ALLOC | SEC_LINKER_CREATED);
2956 htab->dynsbss = s;
2957 if (s == NULL)
2958 return FALSE;
2959
2960 if (! info->shared)
2961 {
2962 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2963 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2964 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2965 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2966 htab->relsbss = s;
2967 if (s == NULL
2968 || ! bfd_set_section_alignment (abfd, s, 2))
2969 return FALSE;
2970 }
2971
2972 if (htab->is_vxworks
2973 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2974 return FALSE;
2975
2976 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2977 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2978 if (s == NULL)
2979 abort ();
2980
2981 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2982 if (htab->plt_type == PLT_VXWORKS)
2983 /* The VxWorks PLT is a loaded section with contents. */
2984 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2985 return bfd_set_section_flags (abfd, s, flags);
2986 }
2987
2988 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2989
2990 static void
2991 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2992 struct elf_link_hash_entry *dir,
2993 struct elf_link_hash_entry *ind)
2994 {
2995 struct ppc_elf_link_hash_entry *edir, *eind;
2996
2997 edir = (struct ppc_elf_link_hash_entry *) dir;
2998 eind = (struct ppc_elf_link_hash_entry *) ind;
2999
3000 if (eind->dyn_relocs != NULL)
3001 {
3002 if (edir->dyn_relocs != NULL)
3003 {
3004 struct ppc_elf_dyn_relocs **pp;
3005 struct ppc_elf_dyn_relocs *p;
3006
3007 /* Add reloc counts against the indirect sym to the direct sym
3008 list. Merge any entries against the same section. */
3009 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3010 {
3011 struct ppc_elf_dyn_relocs *q;
3012
3013 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3014 if (q->sec == p->sec)
3015 {
3016 q->pc_count += p->pc_count;
3017 q->count += p->count;
3018 *pp = p->next;
3019 break;
3020 }
3021 if (q == NULL)
3022 pp = &p->next;
3023 }
3024 *pp = edir->dyn_relocs;
3025 }
3026
3027 edir->dyn_relocs = eind->dyn_relocs;
3028 eind->dyn_relocs = NULL;
3029 }
3030
3031 edir->tls_mask |= eind->tls_mask;
3032 edir->has_sda_refs |= eind->has_sda_refs;
3033
3034 /* If called to transfer flags for a weakdef during processing
3035 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3036 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3037 if (!(ELIMINATE_COPY_RELOCS
3038 && eind->elf.root.type != bfd_link_hash_indirect
3039 && edir->elf.dynamic_adjusted))
3040 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3041
3042 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3043 edir->elf.ref_regular |= eind->elf.ref_regular;
3044 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3045 edir->elf.needs_plt |= eind->elf.needs_plt;
3046 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3047
3048 /* If we were called to copy over info for a weak sym, that's all. */
3049 if (eind->elf.root.type != bfd_link_hash_indirect)
3050 return;
3051
3052 /* Copy over the GOT refcount entries that we may have already seen to
3053 the symbol which just became indirect. */
3054 edir->elf.got.refcount += eind->elf.got.refcount;
3055 eind->elf.got.refcount = 0;
3056
3057 /* And plt entries. */
3058 if (eind->elf.plt.plist != NULL)
3059 {
3060 if (edir->elf.plt.plist != NULL)
3061 {
3062 struct plt_entry **entp;
3063 struct plt_entry *ent;
3064
3065 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3066 {
3067 struct plt_entry *dent;
3068
3069 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3070 if (dent->sec == ent->sec && dent->addend == ent->addend)
3071 {
3072 dent->plt.refcount += ent->plt.refcount;
3073 *entp = ent->next;
3074 break;
3075 }
3076 if (dent == NULL)
3077 entp = &ent->next;
3078 }
3079 *entp = edir->elf.plt.plist;
3080 }
3081
3082 edir->elf.plt.plist = eind->elf.plt.plist;
3083 eind->elf.plt.plist = NULL;
3084 }
3085
3086 if (eind->elf.dynindx != -1)
3087 {
3088 if (edir->elf.dynindx != -1)
3089 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3090 edir->elf.dynstr_index);
3091 edir->elf.dynindx = eind->elf.dynindx;
3092 edir->elf.dynstr_index = eind->elf.dynstr_index;
3093 eind->elf.dynindx = -1;
3094 eind->elf.dynstr_index = 0;
3095 }
3096 }
3097
3098 /* Hook called by the linker routine which adds symbols from an object
3099 file. We use it to put .comm items in .sbss, and not .bss. */
3100
3101 static bfd_boolean
3102 ppc_elf_add_symbol_hook (bfd *abfd,
3103 struct bfd_link_info *info,
3104 Elf_Internal_Sym *sym,
3105 const char **namep ATTRIBUTE_UNUSED,
3106 flagword *flagsp ATTRIBUTE_UNUSED,
3107 asection **secp,
3108 bfd_vma *valp)
3109 {
3110 if (sym->st_shndx == SHN_COMMON
3111 && !info->relocatable
3112 && is_ppc_elf (info->output_bfd)
3113 && sym->st_size <= elf_gp_size (abfd))
3114 {
3115 /* Common symbols less than or equal to -G nn bytes are automatically
3116 put into .sbss. */
3117 struct ppc_elf_link_hash_table *htab;
3118
3119 htab = ppc_elf_hash_table (info);
3120 if (htab->sbss == NULL)
3121 {
3122 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3123
3124 if (!htab->elf.dynobj)
3125 htab->elf.dynobj = abfd;
3126
3127 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3128 ".sbss",
3129 flags);
3130 if (htab->sbss == NULL)
3131 return FALSE;
3132 }
3133
3134 *secp = htab->sbss;
3135 *valp = sym->st_size;
3136 }
3137
3138 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3139 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3140
3141 return TRUE;
3142 }
3143 \f
3144 static bfd_boolean
3145 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3146 {
3147 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3148
3149 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3150 TRUE, FALSE, TRUE);
3151 if (lsect->sym == NULL)
3152 return FALSE;
3153 if (lsect->sym->root.type == bfd_link_hash_new)
3154 lsect->sym->non_elf = 0;
3155 lsect->sym->ref_regular = 1;
3156 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3157 return TRUE;
3158 }
3159
3160 /* Create a special linker section. */
3161
3162 static bfd_boolean
3163 ppc_elf_create_linker_section (bfd *abfd,
3164 struct bfd_link_info *info,
3165 flagword flags,
3166 elf_linker_section_t *lsect)
3167 {
3168 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3169 asection *s;
3170
3171 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3172 | SEC_LINKER_CREATED);
3173
3174 /* Record the first bfd that needs the special sections. */
3175 if (!htab->elf.dynobj)
3176 htab->elf.dynobj = abfd;
3177
3178 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3179 lsect->name,
3180 flags);
3181 if (s == NULL
3182 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3183 return FALSE;
3184 lsect->section = s;
3185
3186 return create_sdata_sym (info, lsect);
3187 }
3188
3189 /* Find a linker generated pointer with a given addend and type. */
3190
3191 static elf_linker_section_pointers_t *
3192 elf_find_pointer_linker_section
3193 (elf_linker_section_pointers_t *linker_pointers,
3194 bfd_vma addend,
3195 elf_linker_section_t *lsect)
3196 {
3197 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3198 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3199 return linker_pointers;
3200
3201 return NULL;
3202 }
3203
3204 /* Allocate a pointer to live in a linker created section. */
3205
3206 static bfd_boolean
3207 elf_create_pointer_linker_section (bfd *abfd,
3208 elf_linker_section_t *lsect,
3209 struct elf_link_hash_entry *h,
3210 const Elf_Internal_Rela *rel)
3211 {
3212 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3213 elf_linker_section_pointers_t *linker_section_ptr;
3214 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3215 bfd_size_type amt;
3216
3217 BFD_ASSERT (lsect != NULL);
3218
3219 /* Is this a global symbol? */
3220 if (h != NULL)
3221 {
3222 struct ppc_elf_link_hash_entry *eh;
3223
3224 /* Has this symbol already been allocated? If so, our work is done. */
3225 eh = (struct ppc_elf_link_hash_entry *) h;
3226 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3227 rel->r_addend,
3228 lsect))
3229 return TRUE;
3230
3231 ptr_linker_section_ptr = &eh->linker_section_pointer;
3232 }
3233 else
3234 {
3235 BFD_ASSERT (is_ppc_elf (abfd));
3236
3237 /* Allocation of a pointer to a local symbol. */
3238 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3239
3240 /* Allocate a table to hold the local symbols if first time. */
3241 if (!ptr)
3242 {
3243 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3244
3245 amt = num_symbols;
3246 amt *= sizeof (elf_linker_section_pointers_t *);
3247 ptr = bfd_zalloc (abfd, amt);
3248
3249 if (!ptr)
3250 return FALSE;
3251
3252 elf_local_ptr_offsets (abfd) = ptr;
3253 }
3254
3255 /* Has this symbol already been allocated? If so, our work is done. */
3256 if (elf_find_pointer_linker_section (ptr[r_symndx],
3257 rel->r_addend,
3258 lsect))
3259 return TRUE;
3260
3261 ptr_linker_section_ptr = &ptr[r_symndx];
3262 }
3263
3264 /* Allocate space for a pointer in the linker section, and allocate
3265 a new pointer record from internal memory. */
3266 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3267 amt = sizeof (elf_linker_section_pointers_t);
3268 linker_section_ptr = bfd_alloc (abfd, amt);
3269
3270 if (!linker_section_ptr)
3271 return FALSE;
3272
3273 linker_section_ptr->next = *ptr_linker_section_ptr;
3274 linker_section_ptr->addend = rel->r_addend;
3275 linker_section_ptr->lsect = lsect;
3276 *ptr_linker_section_ptr = linker_section_ptr;
3277
3278 linker_section_ptr->offset = lsect->section->size;
3279 lsect->section->size += 4;
3280
3281 #ifdef DEBUG
3282 fprintf (stderr,
3283 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3284 lsect->name, (long) linker_section_ptr->offset,
3285 (long) lsect->section->size);
3286 #endif
3287
3288 return TRUE;
3289 }
3290
3291 static struct plt_entry **
3292 update_local_sym_info (bfd *abfd,
3293 Elf_Internal_Shdr *symtab_hdr,
3294 unsigned long r_symndx,
3295 int tls_type)
3296 {
3297 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3298 struct plt_entry **local_plt;
3299 char *local_got_tls_masks;
3300
3301 if (local_got_refcounts == NULL)
3302 {
3303 bfd_size_type size = symtab_hdr->sh_info;
3304
3305 size *= (sizeof (*local_got_refcounts)
3306 + sizeof (*local_plt)
3307 + sizeof (*local_got_tls_masks));
3308 local_got_refcounts = bfd_zalloc (abfd, size);
3309 if (local_got_refcounts == NULL)
3310 return NULL;
3311 elf_local_got_refcounts (abfd) = local_got_refcounts;
3312 }
3313
3314 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3315 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3316 local_got_tls_masks[r_symndx] |= tls_type;
3317 if (tls_type != PLT_IFUNC)
3318 local_got_refcounts[r_symndx] += 1;
3319 return local_plt + r_symndx;
3320 }
3321
3322 static bfd_boolean
3323 update_plt_info (bfd *abfd, struct plt_entry **plist,
3324 asection *sec, bfd_vma addend)
3325 {
3326 struct plt_entry *ent;
3327
3328 if (addend < 32768)
3329 sec = NULL;
3330 for (ent = *plist; ent != NULL; ent = ent->next)
3331 if (ent->sec == sec && ent->addend == addend)
3332 break;
3333 if (ent == NULL)
3334 {
3335 bfd_size_type amt = sizeof (*ent);
3336 ent = bfd_alloc (abfd, amt);
3337 if (ent == NULL)
3338 return FALSE;
3339 ent->next = *plist;
3340 ent->sec = sec;
3341 ent->addend = addend;
3342 ent->plt.refcount = 0;
3343 *plist = ent;
3344 }
3345 ent->plt.refcount += 1;
3346 return TRUE;
3347 }
3348
3349 static struct plt_entry *
3350 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3351 {
3352 struct plt_entry *ent;
3353
3354 if (addend < 32768)
3355 sec = NULL;
3356 for (ent = *plist; ent != NULL; ent = ent->next)
3357 if (ent->sec == sec && ent->addend == addend)
3358 break;
3359 return ent;
3360 }
3361
3362 static bfd_boolean
3363 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3364 {
3365 return (r_type == R_PPC_PLTREL24
3366 || r_type == R_PPC_LOCAL24PC
3367 || r_type == R_PPC_REL24
3368 || r_type == R_PPC_REL14
3369 || r_type == R_PPC_REL14_BRTAKEN
3370 || r_type == R_PPC_REL14_BRNTAKEN
3371 || r_type == R_PPC_ADDR24
3372 || r_type == R_PPC_ADDR14
3373 || r_type == R_PPC_ADDR14_BRTAKEN
3374 || r_type == R_PPC_ADDR14_BRNTAKEN);
3375 }
3376
3377 static void
3378 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3379 {
3380 (*_bfd_error_handler)
3381 (_("%B: relocation %s cannot be used when making a shared object"),
3382 abfd,
3383 ppc_elf_howto_table[r_type]->name);
3384 bfd_set_error (bfd_error_bad_value);
3385 }
3386
3387 /* Look through the relocs for a section during the first phase, and
3388 allocate space in the global offset table or procedure linkage
3389 table. */
3390
3391 static bfd_boolean
3392 ppc_elf_check_relocs (bfd *abfd,
3393 struct bfd_link_info *info,
3394 asection *sec,
3395 const Elf_Internal_Rela *relocs)
3396 {
3397 struct ppc_elf_link_hash_table *htab;
3398 Elf_Internal_Shdr *symtab_hdr;
3399 struct elf_link_hash_entry **sym_hashes;
3400 const Elf_Internal_Rela *rel;
3401 const Elf_Internal_Rela *rel_end;
3402 asection *got2, *sreloc;
3403 struct elf_link_hash_entry *tga;
3404
3405 if (info->relocatable)
3406 return TRUE;
3407
3408 /* Don't do anything special with non-loaded, non-alloced sections.
3409 In particular, any relocs in such sections should not affect GOT
3410 and PLT reference counting (ie. we don't allow them to create GOT
3411 or PLT entries), there's no possibility or desire to optimize TLS
3412 relocs, and there's not much point in propagating relocs to shared
3413 libs that the dynamic linker won't relocate. */
3414 if ((sec->flags & SEC_ALLOC) == 0)
3415 return TRUE;
3416
3417 #ifdef DEBUG
3418 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3419 sec, abfd);
3420 #endif
3421
3422 BFD_ASSERT (is_ppc_elf (abfd));
3423
3424 /* Initialize howto table if not already done. */
3425 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3426 ppc_elf_howto_init ();
3427
3428 htab = ppc_elf_hash_table (info);
3429 if (htab->glink == NULL)
3430 {
3431 if (htab->elf.dynobj == NULL)
3432 htab->elf.dynobj = abfd;
3433 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3434 return FALSE;
3435 }
3436 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3437 FALSE, FALSE, TRUE);
3438 symtab_hdr = &elf_symtab_hdr (abfd);
3439 sym_hashes = elf_sym_hashes (abfd);
3440 got2 = bfd_get_section_by_name (abfd, ".got2");
3441 sreloc = NULL;
3442
3443 rel_end = relocs + sec->reloc_count;
3444 for (rel = relocs; rel < rel_end; rel++)
3445 {
3446 unsigned long r_symndx;
3447 enum elf_ppc_reloc_type r_type;
3448 struct elf_link_hash_entry *h;
3449 int tls_type;
3450 struct plt_entry **ifunc;
3451
3452 r_symndx = ELF32_R_SYM (rel->r_info);
3453 if (r_symndx < symtab_hdr->sh_info)
3454 h = NULL;
3455 else
3456 {
3457 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3458 while (h->root.type == bfd_link_hash_indirect
3459 || h->root.type == bfd_link_hash_warning)
3460 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3461 }
3462
3463 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3464 This shows up in particular in an R_PPC_ADDR32 in the eabi
3465 startup code. */
3466 if (h != NULL
3467 && htab->got == NULL
3468 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3469 {
3470 if (htab->elf.dynobj == NULL)
3471 htab->elf.dynobj = abfd;
3472 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3473 return FALSE;
3474 BFD_ASSERT (h == htab->elf.hgot);
3475 }
3476
3477 tls_type = 0;
3478 ifunc = NULL;
3479 r_type = ELF32_R_TYPE (rel->r_info);
3480 if (!htab->is_vxworks)
3481 {
3482 if (h != NULL)
3483 {
3484 if (h->type == STT_GNU_IFUNC)
3485 ifunc = &h->plt.plist;
3486 }
3487 else
3488 {
3489 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3490 abfd, r_symndx);
3491 if (isym == NULL)
3492 return FALSE;
3493
3494 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3495 && (!info->shared
3496 || is_branch_reloc (r_type)))
3497 {
3498 bfd_vma addend;
3499
3500 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3501 PLT_IFUNC);
3502 if (ifunc == NULL)
3503 return FALSE;
3504
3505 /* STT_GNU_IFUNC symbols must have a PLT entry;
3506 In a non-pie executable even when there are
3507 no plt calls. */
3508 addend = 0;
3509 if (r_type == R_PPC_PLTREL24)
3510 {
3511 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3512 if (info->shared)
3513 addend = rel->r_addend;
3514 }
3515 if (!update_plt_info (abfd, ifunc, got2, addend))
3516 return FALSE;
3517 }
3518 }
3519 }
3520
3521 if (!htab->is_vxworks
3522 && is_branch_reloc (r_type)
3523 && h != NULL
3524 && h == tga)
3525 {
3526 if (rel != relocs
3527 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3528 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3529 /* We have a new-style __tls_get_addr call with a marker
3530 reloc. */
3531 ;
3532 else
3533 /* Mark this section as having an old-style call. */
3534 sec->has_tls_get_addr_call = 1;
3535 }
3536
3537 switch (r_type)
3538 {
3539 case R_PPC_TLSGD:
3540 case R_PPC_TLSLD:
3541 /* These special tls relocs tie a call to __tls_get_addr with
3542 its parameter symbol. */
3543 break;
3544
3545 case R_PPC_GOT_TLSLD16:
3546 case R_PPC_GOT_TLSLD16_LO:
3547 case R_PPC_GOT_TLSLD16_HI:
3548 case R_PPC_GOT_TLSLD16_HA:
3549 tls_type = TLS_TLS | TLS_LD;
3550 goto dogottls;
3551
3552 case R_PPC_GOT_TLSGD16:
3553 case R_PPC_GOT_TLSGD16_LO:
3554 case R_PPC_GOT_TLSGD16_HI:
3555 case R_PPC_GOT_TLSGD16_HA:
3556 tls_type = TLS_TLS | TLS_GD;
3557 goto dogottls;
3558
3559 case R_PPC_GOT_TPREL16:
3560 case R_PPC_GOT_TPREL16_LO:
3561 case R_PPC_GOT_TPREL16_HI:
3562 case R_PPC_GOT_TPREL16_HA:
3563 if (!info->executable)
3564 info->flags |= DF_STATIC_TLS;
3565 tls_type = TLS_TLS | TLS_TPREL;
3566 goto dogottls;
3567
3568 case R_PPC_GOT_DTPREL16:
3569 case R_PPC_GOT_DTPREL16_LO:
3570 case R_PPC_GOT_DTPREL16_HI:
3571 case R_PPC_GOT_DTPREL16_HA:
3572 tls_type = TLS_TLS | TLS_DTPREL;
3573 dogottls:
3574 sec->has_tls_reloc = 1;
3575 /* Fall thru */
3576
3577 /* GOT16 relocations */
3578 case R_PPC_GOT16:
3579 case R_PPC_GOT16_LO:
3580 case R_PPC_GOT16_HI:
3581 case R_PPC_GOT16_HA:
3582 /* This symbol requires a global offset table entry. */
3583 if (htab->got == NULL)
3584 {
3585 if (htab->elf.dynobj == NULL)
3586 htab->elf.dynobj = abfd;
3587 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3588 return FALSE;
3589 }
3590 if (h != NULL)
3591 {
3592 h->got.refcount += 1;
3593 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3594 }
3595 else
3596 /* This is a global offset table entry for a local symbol. */
3597 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3598 return FALSE;
3599
3600 /* We may also need a plt entry if the symbol turns out to be
3601 an ifunc. */
3602 if (h != NULL && !info->shared)
3603 {
3604 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3605 return FALSE;
3606 }
3607 break;
3608
3609 /* Indirect .sdata relocation. */
3610 case R_PPC_EMB_SDAI16:
3611 if (info->shared)
3612 {
3613 bad_shared_reloc (abfd, r_type);
3614 return FALSE;
3615 }
3616 if (htab->sdata[0].section == NULL
3617 && !ppc_elf_create_linker_section (abfd, info, 0,
3618 &htab->sdata[0]))
3619 return FALSE;
3620 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3621 h, rel))
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 /* Indirect .sdata2 relocation. */
3631 case R_PPC_EMB_SDA2I16:
3632 if (info->shared)
3633 {
3634 bad_shared_reloc (abfd, r_type);
3635 return FALSE;
3636 }
3637 if (htab->sdata[1].section == NULL
3638 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3639 &htab->sdata[1]))
3640 return FALSE;
3641 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3642 h, rel))
3643 return FALSE;
3644 if (h != NULL)
3645 {
3646 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3647 h->non_got_ref = TRUE;
3648 }
3649 break;
3650
3651 case R_PPC_SDAREL16:
3652 if (htab->sdata[0].sym == NULL
3653 && !create_sdata_sym (info, &htab->sdata[0]))
3654 return FALSE;
3655 if (h != NULL)
3656 {
3657 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3658 h->non_got_ref = TRUE;
3659 }
3660 break;
3661
3662 case R_PPC_EMB_SDA2REL:
3663 if (info->shared)
3664 {
3665 bad_shared_reloc (abfd, r_type);
3666 return FALSE;
3667 }
3668 if (htab->sdata[1].sym == NULL
3669 && !create_sdata_sym (info, &htab->sdata[1]))
3670 return FALSE;
3671 if (h != NULL)
3672 {
3673 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3674 h->non_got_ref = TRUE;
3675 }
3676 break;
3677
3678 case R_PPC_EMB_SDA21:
3679 case R_PPC_EMB_RELSDA:
3680 if (info->shared)
3681 {
3682 bad_shared_reloc (abfd, r_type);
3683 return FALSE;
3684 }
3685 if (htab->sdata[0].sym == NULL
3686 && !create_sdata_sym (info, &htab->sdata[0]))
3687 return FALSE;
3688 if (htab->sdata[1].sym == NULL
3689 && !create_sdata_sym (info, &htab->sdata[1]))
3690 return FALSE;
3691 if (h != NULL)
3692 {
3693 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3694 h->non_got_ref = TRUE;
3695 }
3696 break;
3697
3698 case R_PPC_EMB_NADDR32:
3699 case R_PPC_EMB_NADDR16:
3700 case R_PPC_EMB_NADDR16_LO:
3701 case R_PPC_EMB_NADDR16_HI:
3702 case R_PPC_EMB_NADDR16_HA:
3703 if (info->shared)
3704 {
3705 bad_shared_reloc (abfd, r_type);
3706 return FALSE;
3707 }
3708 if (h != NULL)
3709 h->non_got_ref = TRUE;
3710 break;
3711
3712 case R_PPC_PLTREL24:
3713 if (h == NULL)
3714 break;
3715 /* Fall through */
3716 case R_PPC_PLT32:
3717 case R_PPC_PLTREL32:
3718 case R_PPC_PLT16_LO:
3719 case R_PPC_PLT16_HI:
3720 case R_PPC_PLT16_HA:
3721 #ifdef DEBUG
3722 fprintf (stderr, "Reloc requires a PLT entry\n");
3723 #endif
3724 /* This symbol requires a procedure linkage table entry. We
3725 actually build the entry in finish_dynamic_symbol,
3726 because this might be a case of linking PIC code without
3727 linking in any dynamic objects, in which case we don't
3728 need to generate a procedure linkage table after all. */
3729
3730 if (h == NULL)
3731 {
3732 /* It does not make sense to have a procedure linkage
3733 table entry for a local symbol. */
3734 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3735 "local symbol"),
3736 abfd,
3737 sec,
3738 (long) rel->r_offset,
3739 ppc_elf_howto_table[r_type]->name);
3740 bfd_set_error (bfd_error_bad_value);
3741 return FALSE;
3742 }
3743 else
3744 {
3745 bfd_vma addend = 0;
3746
3747 if (r_type == R_PPC_PLTREL24)
3748 {
3749 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3750 if (info->shared)
3751 addend = rel->r_addend;
3752 }
3753 h->needs_plt = 1;
3754 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3755 return FALSE;
3756 }
3757 break;
3758
3759 /* The following relocations don't need to propagate the
3760 relocation if linking a shared object since they are
3761 section relative. */
3762 case R_PPC_SECTOFF:
3763 case R_PPC_SECTOFF_LO:
3764 case R_PPC_SECTOFF_HI:
3765 case R_PPC_SECTOFF_HA:
3766 case R_PPC_DTPREL16:
3767 case R_PPC_DTPREL16_LO:
3768 case R_PPC_DTPREL16_HI:
3769 case R_PPC_DTPREL16_HA:
3770 case R_PPC_TOC16:
3771 break;
3772
3773 case R_PPC_REL16:
3774 case R_PPC_REL16_LO:
3775 case R_PPC_REL16_HI:
3776 case R_PPC_REL16_HA:
3777 ppc_elf_tdata (abfd)->has_rel16 = 1;
3778 break;
3779
3780 /* These are just markers. */
3781 case R_PPC_TLS:
3782 case R_PPC_EMB_MRKREF:
3783 case R_PPC_NONE:
3784 case R_PPC_max:
3785 case R_PPC_RELAX:
3786 case R_PPC_RELAX_PLT:
3787 case R_PPC_RELAX_PLTREL24:
3788 break;
3789
3790 /* These should only appear in dynamic objects. */
3791 case R_PPC_COPY:
3792 case R_PPC_GLOB_DAT:
3793 case R_PPC_JMP_SLOT:
3794 case R_PPC_RELATIVE:
3795 case R_PPC_IRELATIVE:
3796 break;
3797
3798 /* These aren't handled yet. We'll report an error later. */
3799 case R_PPC_ADDR30:
3800 case R_PPC_EMB_RELSEC16:
3801 case R_PPC_EMB_RELST_LO:
3802 case R_PPC_EMB_RELST_HI:
3803 case R_PPC_EMB_RELST_HA:
3804 case R_PPC_EMB_BIT_FLD:
3805 break;
3806
3807 /* This refers only to functions defined in the shared library. */
3808 case R_PPC_LOCAL24PC:
3809 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3810 {
3811 htab->plt_type = PLT_OLD;
3812 htab->old_bfd = abfd;
3813 }
3814 break;
3815
3816 /* This relocation describes the C++ object vtable hierarchy.
3817 Reconstruct it for later use during GC. */
3818 case R_PPC_GNU_VTINHERIT:
3819 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3820 return FALSE;
3821 break;
3822
3823 /* This relocation describes which C++ vtable entries are actually
3824 used. Record for later use during GC. */
3825 case R_PPC_GNU_VTENTRY:
3826 BFD_ASSERT (h != NULL);
3827 if (h != NULL
3828 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3829 return FALSE;
3830 break;
3831
3832 /* We shouldn't really be seeing these. */
3833 case R_PPC_TPREL32:
3834 case R_PPC_TPREL16:
3835 case R_PPC_TPREL16_LO:
3836 case R_PPC_TPREL16_HI:
3837 case R_PPC_TPREL16_HA:
3838 if (!info->executable)
3839 info->flags |= DF_STATIC_TLS;
3840 goto dodyn;
3841
3842 /* Nor these. */
3843 case R_PPC_DTPMOD32:
3844 case R_PPC_DTPREL32:
3845 goto dodyn;
3846
3847 case R_PPC_REL32:
3848 if (h == NULL
3849 && got2 != NULL
3850 && (sec->flags & SEC_CODE) != 0
3851 && info->shared
3852 && htab->plt_type == PLT_UNSET)
3853 {
3854 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3855 the start of a function, which assembles to a REL32
3856 reference to .got2. If we detect one of these, then
3857 force the old PLT layout because the linker cannot
3858 reliably deduce the GOT pointer value needed for
3859 PLT call stubs. */
3860 asection *s;
3861 Elf_Internal_Sym *isym;
3862
3863 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3864 abfd, r_symndx);
3865 if (isym == NULL)
3866 return FALSE;
3867
3868 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3869 if (s == got2)
3870 {
3871 htab->plt_type = PLT_OLD;
3872 htab->old_bfd = abfd;
3873 }
3874 }
3875 if (h == NULL || h == htab->elf.hgot)
3876 break;
3877 /* fall through */
3878
3879 case R_PPC_ADDR32:
3880 case R_PPC_ADDR16:
3881 case R_PPC_ADDR16_LO:
3882 case R_PPC_ADDR16_HI:
3883 case R_PPC_ADDR16_HA:
3884 case R_PPC_UADDR32:
3885 case R_PPC_UADDR16:
3886 if (h != NULL && !info->shared)
3887 {
3888 /* We may need a plt entry if the symbol turns out to be
3889 a function defined in a dynamic object. */
3890 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3891 return FALSE;
3892
3893 /* We may need a copy reloc too. */
3894 h->non_got_ref = 1;
3895 h->pointer_equality_needed = 1;
3896 }
3897 goto dodyn;
3898
3899 case R_PPC_REL24:
3900 case R_PPC_REL14:
3901 case R_PPC_REL14_BRTAKEN:
3902 case R_PPC_REL14_BRNTAKEN:
3903 if (h == NULL)
3904 break;
3905 if (h == htab->elf.hgot)
3906 {
3907 if (htab->plt_type == PLT_UNSET)
3908 {
3909 htab->plt_type = PLT_OLD;
3910 htab->old_bfd = abfd;
3911 }
3912 break;
3913 }
3914 /* fall through */
3915
3916 case R_PPC_ADDR24:
3917 case R_PPC_ADDR14:
3918 case R_PPC_ADDR14_BRTAKEN:
3919 case R_PPC_ADDR14_BRNTAKEN:
3920 if (h != NULL && !info->shared)
3921 {
3922 /* We may need a plt entry if the symbol turns out to be
3923 a function defined in a dynamic object. */
3924 h->needs_plt = 1;
3925 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3926 return FALSE;
3927 break;
3928 }
3929
3930 dodyn:
3931 /* If we are creating a shared library, and this is a reloc
3932 against a global symbol, or a non PC relative reloc
3933 against a local symbol, then we need to copy the reloc
3934 into the shared library. However, if we are linking with
3935 -Bsymbolic, we do not need to copy a reloc against a
3936 global symbol which is defined in an object we are
3937 including in the link (i.e., DEF_REGULAR is set). At
3938 this point we have not seen all the input files, so it is
3939 possible that DEF_REGULAR is not set now but will be set
3940 later (it is never cleared). In case of a weak definition,
3941 DEF_REGULAR may be cleared later by a strong definition in
3942 a shared library. We account for that possibility below by
3943 storing information in the dyn_relocs field of the hash
3944 table entry. A similar situation occurs when creating
3945 shared libraries and symbol visibility changes render the
3946 symbol local.
3947
3948 If on the other hand, we are creating an executable, we
3949 may need to keep relocations for symbols satisfied by a
3950 dynamic library if we manage to avoid copy relocs for the
3951 symbol. */
3952 if ((info->shared
3953 && (must_be_dyn_reloc (info, r_type)
3954 || (h != NULL
3955 && (! info->symbolic
3956 || h->root.type == bfd_link_hash_defweak
3957 || !h->def_regular))))
3958 || (ELIMINATE_COPY_RELOCS
3959 && !info->shared
3960 && h != NULL
3961 && (h->root.type == bfd_link_hash_defweak
3962 || !h->def_regular)))
3963 {
3964 struct ppc_elf_dyn_relocs *p;
3965 struct ppc_elf_dyn_relocs **rel_head;
3966
3967 #ifdef DEBUG
3968 fprintf (stderr,
3969 "ppc_elf_check_relocs needs to "
3970 "create relocation for %s\n",
3971 (h && h->root.root.string
3972 ? h->root.root.string : "<unknown>"));
3973 #endif
3974 if (sreloc == NULL)
3975 {
3976 if (htab->elf.dynobj == NULL)
3977 htab->elf.dynobj = abfd;
3978
3979 sreloc = _bfd_elf_make_dynamic_reloc_section
3980 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3981
3982 if (sreloc == NULL)
3983 return FALSE;
3984 }
3985
3986 /* If this is a global symbol, we count the number of
3987 relocations we need for this symbol. */
3988 if (h != NULL)
3989 {
3990 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3991 }
3992 else
3993 {
3994 /* Track dynamic relocs needed for local syms too.
3995 We really need local syms available to do this
3996 easily. Oh well. */
3997 asection *s;
3998 void *vpp;
3999 Elf_Internal_Sym *isym;
4000
4001 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4002 abfd, r_symndx);
4003 if (isym == NULL)
4004 return FALSE;
4005
4006 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4007 if (s == NULL)
4008 s = sec;
4009
4010 vpp = &elf_section_data (s)->local_dynrel;
4011 rel_head = (struct ppc_elf_dyn_relocs **) vpp;
4012 }
4013
4014 p = *rel_head;
4015 if (p == NULL || p->sec != sec)
4016 {
4017 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4018 if (p == NULL)
4019 return FALSE;
4020 p->next = *rel_head;
4021 *rel_head = p;
4022 p->sec = sec;
4023 p->count = 0;
4024 p->pc_count = 0;
4025 }
4026
4027 p->count += 1;
4028 if (!must_be_dyn_reloc (info, r_type))
4029 p->pc_count += 1;
4030 }
4031
4032 break;
4033 }
4034 }
4035
4036 return TRUE;
4037 }
4038 \f
4039
4040 /* Merge object attributes from IBFD into OBFD. Raise an error if
4041 there are conflicting attributes. */
4042 static bfd_boolean
4043 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4044 {
4045 obj_attribute *in_attr, *in_attrs;
4046 obj_attribute *out_attr, *out_attrs;
4047
4048 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4049 {
4050 /* This is the first object. Copy the attributes. */
4051 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4052
4053 /* Use the Tag_null value to indicate the attributes have been
4054 initialized. */
4055 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4056
4057 return TRUE;
4058 }
4059
4060 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4061 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4062
4063 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4064 non-conflicting ones. */
4065 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4066 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4067 if (in_attr->i != out_attr->i)
4068 {
4069 out_attr->type = 1;
4070 if (out_attr->i == 0)
4071 out_attr->i = in_attr->i;
4072 else if (in_attr->i == 0)
4073 ;
4074 else if (out_attr->i == 1 && in_attr->i == 2)
4075 _bfd_error_handler
4076 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4077 else if (out_attr->i == 1 && in_attr->i == 3)
4078 _bfd_error_handler
4079 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4080 obfd, ibfd);
4081 else if (out_attr->i == 3 && in_attr->i == 1)
4082 _bfd_error_handler
4083 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4084 ibfd, obfd);
4085 else if (out_attr->i == 3 && in_attr->i == 2)
4086 _bfd_error_handler
4087 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4088 ibfd, obfd);
4089 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4090 _bfd_error_handler
4091 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4092 else if (in_attr->i > 3)
4093 _bfd_error_handler
4094 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4095 in_attr->i);
4096 else
4097 _bfd_error_handler
4098 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4099 out_attr->i);
4100 }
4101
4102 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4103 merge non-conflicting ones. */
4104 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4105 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4106 if (in_attr->i != out_attr->i)
4107 {
4108 const char *in_abi = NULL, *out_abi = NULL;
4109
4110 switch (in_attr->i)
4111 {
4112 case 1: in_abi = "generic"; break;
4113 case 2: in_abi = "AltiVec"; break;
4114 case 3: in_abi = "SPE"; break;
4115 }
4116
4117 switch (out_attr->i)
4118 {
4119 case 1: out_abi = "generic"; break;
4120 case 2: out_abi = "AltiVec"; break;
4121 case 3: out_abi = "SPE"; break;
4122 }
4123
4124 out_attr->type = 1;
4125 if (out_attr->i == 0)
4126 out_attr->i = in_attr->i;
4127 else if (in_attr->i == 0)
4128 ;
4129 /* For now, allow generic to transition to AltiVec or SPE
4130 without a warning. If GCC marked files with their stack
4131 alignment and used don't-care markings for files which are
4132 not affected by the vector ABI, we could warn about this
4133 case too. */
4134 else if (out_attr->i == 1)
4135 out_attr->i = in_attr->i;
4136 else if (in_attr->i == 1)
4137 ;
4138 else if (in_abi == NULL)
4139 _bfd_error_handler
4140 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4141 in_attr->i);
4142 else if (out_abi == NULL)
4143 _bfd_error_handler
4144 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4145 in_attr->i);
4146 else
4147 _bfd_error_handler
4148 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4149 ibfd, obfd, in_abi, out_abi);
4150 }
4151
4152 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4153 and merge non-conflicting ones. */
4154 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4155 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4156 if (in_attr->i != out_attr->i)
4157 {
4158 out_attr->type = 1;
4159 if (out_attr->i == 0)
4160 out_attr->i = in_attr->i;
4161 else if (in_attr->i == 0)
4162 ;
4163 else if (out_attr->i == 1 && in_attr->i == 2)
4164 _bfd_error_handler
4165 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4166 else if (out_attr->i == 2 && in_attr->i == 1)
4167 _bfd_error_handler
4168 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4169 else if (in_attr->i > 2)
4170 _bfd_error_handler
4171 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4172 in_attr->i);
4173 else
4174 _bfd_error_handler
4175 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4176 out_attr->i);
4177 }
4178
4179 /* Merge Tag_compatibility attributes and any common GNU ones. */
4180 _bfd_elf_merge_object_attributes (ibfd, obfd);
4181
4182 return TRUE;
4183 }
4184
4185 /* Merge backend specific data from an object file to the output
4186 object file when linking. */
4187
4188 static bfd_boolean
4189 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4190 {
4191 flagword old_flags;
4192 flagword new_flags;
4193 bfd_boolean error;
4194
4195 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4196 return TRUE;
4197
4198 /* Check if we have the same endianess. */
4199 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4200 return FALSE;
4201
4202 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4203 return FALSE;
4204
4205 new_flags = elf_elfheader (ibfd)->e_flags;
4206 old_flags = elf_elfheader (obfd)->e_flags;
4207 if (!elf_flags_init (obfd))
4208 {
4209 /* First call, no flags set. */
4210 elf_flags_init (obfd) = TRUE;
4211 elf_elfheader (obfd)->e_flags = new_flags;
4212 }
4213
4214 /* Compatible flags are ok. */
4215 else if (new_flags == old_flags)
4216 ;
4217
4218 /* Incompatible flags. */
4219 else
4220 {
4221 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4222 to be linked with either. */
4223 error = FALSE;
4224 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4225 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4226 {
4227 error = TRUE;
4228 (*_bfd_error_handler)
4229 (_("%B: compiled with -mrelocatable and linked with "
4230 "modules compiled normally"), ibfd);
4231 }
4232 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4233 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4234 {
4235 error = TRUE;
4236 (*_bfd_error_handler)
4237 (_("%B: compiled normally and linked with "
4238 "modules compiled with -mrelocatable"), ibfd);
4239 }
4240
4241 /* The output is -mrelocatable-lib iff both the input files are. */
4242 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4243 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4244
4245 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4246 but each input file is either -mrelocatable or -mrelocatable-lib. */
4247 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4248 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4249 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4250 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4251
4252 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4253 any module uses it. */
4254 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4255
4256 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4257 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4258
4259 /* Warn about any other mismatches. */
4260 if (new_flags != old_flags)
4261 {
4262 error = TRUE;
4263 (*_bfd_error_handler)
4264 (_("%B: uses different e_flags (0x%lx) fields "
4265 "than previous modules (0x%lx)"),
4266 ibfd, (long) new_flags, (long) old_flags);
4267 }
4268
4269 if (error)
4270 {
4271 bfd_set_error (bfd_error_bad_value);
4272 return FALSE;
4273 }
4274 }
4275
4276 return TRUE;
4277 }
4278 \f
4279 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4280 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4281 int
4282 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4283 struct bfd_link_info *info,
4284 enum ppc_elf_plt_type plt_style,
4285 int emit_stub_syms)
4286 {
4287 struct ppc_elf_link_hash_table *htab;
4288 flagword flags;
4289
4290 htab = ppc_elf_hash_table (info);
4291
4292 htab->emit_stub_syms = emit_stub_syms;
4293
4294 if (htab->plt_type == PLT_UNSET)
4295 {
4296 if (plt_style == PLT_OLD)
4297 htab->plt_type = PLT_OLD;
4298 else
4299 {
4300 bfd *ibfd;
4301 enum ppc_elf_plt_type plt_type = plt_style;
4302
4303 /* Look through the reloc flags left by ppc_elf_check_relocs.
4304 Use the old style bss plt if a file makes plt calls
4305 without using the new relocs, and if ld isn't given
4306 --secure-plt and we never see REL16 relocs. */
4307 if (plt_type == PLT_UNSET)
4308 plt_type = PLT_OLD;
4309 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4310 if (is_ppc_elf (ibfd))
4311 {
4312 if (ppc_elf_tdata (ibfd)->has_rel16)
4313 plt_type = PLT_NEW;
4314 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4315 {
4316 plt_type = PLT_OLD;
4317 htab->old_bfd = ibfd;
4318 break;
4319 }
4320 }
4321 htab->plt_type = plt_type;
4322 }
4323 }
4324 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4325 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4326
4327 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4328
4329 if (htab->plt_type == PLT_NEW)
4330 {
4331 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4332 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4333
4334 /* The new PLT is a loaded section. */
4335 if (htab->plt != NULL
4336 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4337 return -1;
4338
4339 /* The new GOT is not executable. */
4340 if (htab->got != NULL
4341 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4342 return -1;
4343 }
4344 else
4345 {
4346 /* Stop an unused .glink section from affecting .text alignment. */
4347 if (htab->glink != NULL
4348 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4349 return -1;
4350 }
4351 return htab->plt_type == PLT_NEW;
4352 }
4353 \f
4354 /* Return the section that should be marked against GC for a given
4355 relocation. */
4356
4357 static asection *
4358 ppc_elf_gc_mark_hook (asection *sec,
4359 struct bfd_link_info *info,
4360 Elf_Internal_Rela *rel,
4361 struct elf_link_hash_entry *h,
4362 Elf_Internal_Sym *sym)
4363 {
4364 if (h != NULL)
4365 switch (ELF32_R_TYPE (rel->r_info))
4366 {
4367 case R_PPC_GNU_VTINHERIT:
4368 case R_PPC_GNU_VTENTRY:
4369 return NULL;
4370 }
4371
4372 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4373 }
4374
4375 /* Update the got, plt and dynamic reloc reference counts for the
4376 section being removed. */
4377
4378 static bfd_boolean
4379 ppc_elf_gc_sweep_hook (bfd *abfd,
4380 struct bfd_link_info *info,
4381 asection *sec,
4382 const Elf_Internal_Rela *relocs)
4383 {
4384 struct ppc_elf_link_hash_table *htab;
4385 Elf_Internal_Shdr *symtab_hdr;
4386 struct elf_link_hash_entry **sym_hashes;
4387 bfd_signed_vma *local_got_refcounts;
4388 const Elf_Internal_Rela *rel, *relend;
4389 asection *got2;
4390
4391 if (info->relocatable)
4392 return TRUE;
4393
4394 if ((sec->flags & SEC_ALLOC) == 0)
4395 return TRUE;
4396
4397 elf_section_data (sec)->local_dynrel = NULL;
4398
4399 htab = ppc_elf_hash_table (info);
4400 symtab_hdr = &elf_symtab_hdr (abfd);
4401 sym_hashes = elf_sym_hashes (abfd);
4402 local_got_refcounts = elf_local_got_refcounts (abfd);
4403 got2 = bfd_get_section_by_name (abfd, ".got2");
4404
4405 relend = relocs + sec->reloc_count;
4406 for (rel = relocs; rel < relend; rel++)
4407 {
4408 unsigned long r_symndx;
4409 enum elf_ppc_reloc_type r_type;
4410 struct elf_link_hash_entry *h = NULL;
4411
4412 r_symndx = ELF32_R_SYM (rel->r_info);
4413 if (r_symndx >= symtab_hdr->sh_info)
4414 {
4415 struct ppc_elf_dyn_relocs **pp, *p;
4416 struct ppc_elf_link_hash_entry *eh;
4417
4418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4419 while (h->root.type == bfd_link_hash_indirect
4420 || h->root.type == bfd_link_hash_warning)
4421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4422 eh = (struct ppc_elf_link_hash_entry *) h;
4423
4424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4425 if (p->sec == sec)
4426 {
4427 /* Everything must go for SEC. */
4428 *pp = p->next;
4429 break;
4430 }
4431 }
4432
4433 r_type = ELF32_R_TYPE (rel->r_info);
4434 if (!htab->is_vxworks
4435 && h == NULL
4436 && local_got_refcounts != NULL
4437 && (!info->shared
4438 || is_branch_reloc (r_type)))
4439 {
4440 struct plt_entry **local_plt = (struct plt_entry **)
4441 (local_got_refcounts + symtab_hdr->sh_info);
4442 char *local_got_tls_masks = (char *)
4443 (local_plt + symtab_hdr->sh_info);
4444 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4445 {
4446 struct plt_entry **ifunc = local_plt + r_symndx;
4447 bfd_vma addend = 0;
4448 struct plt_entry *ent;
4449
4450 if (r_type == R_PPC_PLTREL24 && info->shared)
4451 addend = rel->r_addend;
4452 ent = find_plt_ent (ifunc, got2, addend);
4453 if (ent->plt.refcount > 0)
4454 ent->plt.refcount -= 1;
4455 continue;
4456 }
4457 }
4458
4459 switch (r_type)
4460 {
4461 case R_PPC_GOT_TLSLD16:
4462 case R_PPC_GOT_TLSLD16_LO:
4463 case R_PPC_GOT_TLSLD16_HI:
4464 case R_PPC_GOT_TLSLD16_HA:
4465 case R_PPC_GOT_TLSGD16:
4466 case R_PPC_GOT_TLSGD16_LO:
4467 case R_PPC_GOT_TLSGD16_HI:
4468 case R_PPC_GOT_TLSGD16_HA:
4469 case R_PPC_GOT_TPREL16:
4470 case R_PPC_GOT_TPREL16_LO:
4471 case R_PPC_GOT_TPREL16_HI:
4472 case R_PPC_GOT_TPREL16_HA:
4473 case R_PPC_GOT_DTPREL16:
4474 case R_PPC_GOT_DTPREL16_LO:
4475 case R_PPC_GOT_DTPREL16_HI:
4476 case R_PPC_GOT_DTPREL16_HA:
4477 case R_PPC_GOT16:
4478 case R_PPC_GOT16_LO:
4479 case R_PPC_GOT16_HI:
4480 case R_PPC_GOT16_HA:
4481 if (h != NULL)
4482 {
4483 if (h->got.refcount > 0)
4484 h->got.refcount--;
4485 if (!info->shared)
4486 {
4487 struct plt_entry *ent;
4488
4489 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4490 if (ent != NULL && ent->plt.refcount > 0)
4491 ent->plt.refcount -= 1;
4492 }
4493 }
4494 else if (local_got_refcounts != NULL)
4495 {
4496 if (local_got_refcounts[r_symndx] > 0)
4497 local_got_refcounts[r_symndx]--;
4498 }
4499 break;
4500
4501 case R_PPC_REL24:
4502 case R_PPC_REL14:
4503 case R_PPC_REL14_BRTAKEN:
4504 case R_PPC_REL14_BRNTAKEN:
4505 case R_PPC_REL32:
4506 if (h == NULL || h == htab->elf.hgot)
4507 break;
4508 /* Fall thru */
4509
4510 case R_PPC_ADDR32:
4511 case R_PPC_ADDR24:
4512 case R_PPC_ADDR16:
4513 case R_PPC_ADDR16_LO:
4514 case R_PPC_ADDR16_HI:
4515 case R_PPC_ADDR16_HA:
4516 case R_PPC_ADDR14:
4517 case R_PPC_ADDR14_BRTAKEN:
4518 case R_PPC_ADDR14_BRNTAKEN:
4519 case R_PPC_UADDR32:
4520 case R_PPC_UADDR16:
4521 if (info->shared)
4522 break;
4523
4524 case R_PPC_PLT32:
4525 case R_PPC_PLTREL24:
4526 case R_PPC_PLTREL32:
4527 case R_PPC_PLT16_LO:
4528 case R_PPC_PLT16_HI:
4529 case R_PPC_PLT16_HA:
4530 if (h != NULL)
4531 {
4532 bfd_vma addend = 0;
4533 struct plt_entry *ent;
4534
4535 if (r_type == R_PPC_PLTREL24 && info->shared)
4536 addend = rel->r_addend;
4537 ent = find_plt_ent (&h->plt.plist, got2, addend);
4538 if (ent != NULL && ent->plt.refcount > 0)
4539 ent->plt.refcount -= 1;
4540 }
4541 break;
4542
4543 default:
4544 break;
4545 }
4546 }
4547 return TRUE;
4548 }
4549 \f
4550 /* Set plt output section type, htab->tls_get_addr, and call the
4551 generic ELF tls_setup function. */
4552
4553 asection *
4554 ppc_elf_tls_setup (bfd *obfd,
4555 struct bfd_link_info *info,
4556 int no_tls_get_addr_opt)
4557 {
4558 struct ppc_elf_link_hash_table *htab;
4559
4560 htab = ppc_elf_hash_table (info);
4561 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4562 FALSE, FALSE, TRUE);
4563 if (!no_tls_get_addr_opt)
4564 {
4565 struct elf_link_hash_entry *opt, *tga;
4566 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4567 FALSE, FALSE, TRUE);
4568 if (opt != NULL
4569 && (opt->root.type == bfd_link_hash_defined
4570 || opt->root.type == bfd_link_hash_defweak))
4571 {
4572 /* If glibc supports an optimized __tls_get_addr call stub,
4573 signalled by the presence of __tls_get_addr_opt, and we'll
4574 be calling __tls_get_addr via a plt call stub, then
4575 make __tls_get_addr point to __tls_get_addr_opt. */
4576 tga = htab->tls_get_addr;
4577 if (htab->elf.dynamic_sections_created
4578 && tga != NULL
4579 && (tga->type == STT_FUNC
4580 || tga->needs_plt)
4581 && !(SYMBOL_CALLS_LOCAL (info, tga)
4582 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4583 && tga->root.type == bfd_link_hash_undefweak)))
4584 {
4585 struct plt_entry *ent;
4586 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4587 if (ent->plt.refcount > 0)
4588 break;
4589 if (ent != NULL)
4590 {
4591 tga->root.type = bfd_link_hash_indirect;
4592 tga->root.u.i.link = &opt->root;
4593 ppc_elf_copy_indirect_symbol (info, opt, tga);
4594 if (opt->dynindx != -1)
4595 {
4596 /* Use __tls_get_addr_opt in dynamic relocations. */
4597 opt->dynindx = -1;
4598 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4599 opt->dynstr_index);
4600 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4601 return FALSE;
4602 }
4603 htab->tls_get_addr = opt;
4604 }
4605 }
4606 }
4607 else
4608 no_tls_get_addr_opt = TRUE;
4609 }
4610 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4611 if (htab->plt_type == PLT_NEW
4612 && htab->plt != NULL
4613 && htab->plt->output_section != NULL)
4614 {
4615 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4616 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4617 }
4618
4619 return _bfd_elf_tls_setup (obfd, info);
4620 }
4621
4622 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4623 HASH. */
4624
4625 static bfd_boolean
4626 branch_reloc_hash_match (const bfd *ibfd,
4627 const Elf_Internal_Rela *rel,
4628 const struct elf_link_hash_entry *hash)
4629 {
4630 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4631 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4632 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4633
4634 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4635 {
4636 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4637 struct elf_link_hash_entry *h;
4638
4639 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4640 while (h->root.type == bfd_link_hash_indirect
4641 || h->root.type == bfd_link_hash_warning)
4642 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4643 if (h == hash)
4644 return TRUE;
4645 }
4646 return FALSE;
4647 }
4648
4649 /* Run through all the TLS relocs looking for optimization
4650 opportunities. */
4651
4652 bfd_boolean
4653 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4654 struct bfd_link_info *info)
4655 {
4656 bfd *ibfd;
4657 asection *sec;
4658 struct ppc_elf_link_hash_table *htab;
4659 int pass;
4660
4661 if (info->relocatable || !info->executable)
4662 return TRUE;
4663
4664 htab = ppc_elf_hash_table (info);
4665 /* Make two passes through the relocs. First time check that tls
4666 relocs involved in setting up a tls_get_addr call are indeed
4667 followed by such a call. If they are not, exclude them from
4668 the optimizations done on the second pass. */
4669 for (pass = 0; pass < 2; ++pass)
4670 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4671 {
4672 Elf_Internal_Sym *locsyms = NULL;
4673 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4674 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4675
4676 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4677 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4678 {
4679 Elf_Internal_Rela *relstart, *rel, *relend;
4680
4681 /* Read the relocations. */
4682 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4683 info->keep_memory);
4684 if (relstart == NULL)
4685 return FALSE;
4686
4687 relend = relstart + sec->reloc_count;
4688 for (rel = relstart; rel < relend; rel++)
4689 {
4690 enum elf_ppc_reloc_type r_type;
4691 unsigned long r_symndx;
4692 struct elf_link_hash_entry *h = NULL;
4693 char *tls_mask;
4694 char tls_set, tls_clear;
4695 bfd_boolean is_local;
4696 int expecting_tls_get_addr;
4697 bfd_signed_vma *got_count;
4698
4699 r_symndx = ELF32_R_SYM (rel->r_info);
4700 if (r_symndx >= symtab_hdr->sh_info)
4701 {
4702 struct elf_link_hash_entry **sym_hashes;
4703
4704 sym_hashes = elf_sym_hashes (ibfd);
4705 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4706 while (h->root.type == bfd_link_hash_indirect
4707 || h->root.type == bfd_link_hash_warning)
4708 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4709 }
4710
4711 expecting_tls_get_addr = 0;
4712 is_local = FALSE;
4713 if (h == NULL
4714 || !h->def_dynamic)
4715 is_local = TRUE;
4716
4717 r_type = ELF32_R_TYPE (rel->r_info);
4718 switch (r_type)
4719 {
4720 case R_PPC_GOT_TLSLD16:
4721 case R_PPC_GOT_TLSLD16_LO:
4722 expecting_tls_get_addr = 1;
4723 /* Fall thru */
4724
4725 case R_PPC_GOT_TLSLD16_HI:
4726 case R_PPC_GOT_TLSLD16_HA:
4727 /* These relocs should never be against a symbol
4728 defined in a shared lib. Leave them alone if
4729 that turns out to be the case. */
4730 if (!is_local)
4731 continue;
4732
4733 /* LD -> LE */
4734 tls_set = 0;
4735 tls_clear = TLS_LD;
4736 break;
4737
4738 case R_PPC_GOT_TLSGD16:
4739 case R_PPC_GOT_TLSGD16_LO:
4740 expecting_tls_get_addr = 1;
4741 /* Fall thru */
4742
4743 case R_PPC_GOT_TLSGD16_HI:
4744 case R_PPC_GOT_TLSGD16_HA:
4745 if (is_local)
4746 /* GD -> LE */
4747 tls_set = 0;
4748 else
4749 /* GD -> IE */
4750 tls_set = TLS_TLS | TLS_TPRELGD;
4751 tls_clear = TLS_GD;
4752 break;
4753
4754 case R_PPC_GOT_TPREL16:
4755 case R_PPC_GOT_TPREL16_LO:
4756 case R_PPC_GOT_TPREL16_HI:
4757 case R_PPC_GOT_TPREL16_HA:
4758 if (is_local)
4759 {
4760 /* IE -> LE */
4761 tls_set = 0;
4762 tls_clear = TLS_TPREL;
4763 break;
4764 }
4765 else
4766 continue;
4767
4768 case R_PPC_TLSGD:
4769 case R_PPC_TLSLD:
4770 expecting_tls_get_addr = 2;
4771 tls_set = 0;
4772 tls_clear = 0;
4773 break;
4774
4775 default:
4776 continue;
4777 }
4778
4779 if (pass == 0)
4780 {
4781 if (!expecting_tls_get_addr
4782 || (expecting_tls_get_addr == 1
4783 && !sec->has_tls_get_addr_call))
4784 continue;
4785
4786 if (rel + 1 < relend
4787 && branch_reloc_hash_match (ibfd, rel + 1,
4788 htab->tls_get_addr))
4789 continue;
4790
4791 /* Uh oh, we didn't find the expected call. We
4792 could just mark this symbol to exclude it
4793 from tls optimization but it's safer to skip
4794 the entire section. */
4795 sec->has_tls_reloc = 0;
4796 break;
4797 }
4798
4799 if (expecting_tls_get_addr)
4800 {
4801 struct plt_entry *ent;
4802 bfd_vma addend = 0;
4803
4804 if (info->shared
4805 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4806 addend = rel[1].r_addend;
4807 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4808 got2, addend);
4809 if (ent != NULL && ent->plt.refcount > 0)
4810 ent->plt.refcount -= 1;
4811
4812 if (expecting_tls_get_addr == 2)
4813 continue;
4814 }
4815
4816 if (h != NULL)
4817 {
4818 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4819 got_count = &h->got.refcount;
4820 }
4821 else
4822 {
4823 Elf_Internal_Sym *sym;
4824 bfd_signed_vma *lgot_refs;
4825 struct plt_entry **local_plt;
4826 char *lgot_masks;
4827
4828 if (locsyms == NULL)
4829 {
4830 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4831 if (locsyms == NULL)
4832 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4833 symtab_hdr->sh_info,
4834 0, NULL, NULL, NULL);
4835 if (locsyms == NULL)
4836 {
4837 if (elf_section_data (sec)->relocs != relstart)
4838 free (relstart);
4839 return FALSE;
4840 }
4841 }
4842 sym = locsyms + r_symndx;
4843 lgot_refs = elf_local_got_refcounts (ibfd);
4844 if (lgot_refs == NULL)
4845 abort ();
4846 local_plt = (struct plt_entry **)
4847 (lgot_refs + symtab_hdr->sh_info);
4848 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4849 tls_mask = &lgot_masks[r_symndx];
4850 got_count = &lgot_refs[r_symndx];
4851 }
4852
4853 if (tls_set == 0)
4854 {
4855 /* We managed to get rid of a got entry. */
4856 if (*got_count > 0)
4857 *got_count -= 1;
4858 }
4859
4860 *tls_mask |= tls_set;
4861 *tls_mask &= ~tls_clear;
4862 }
4863
4864 if (elf_section_data (sec)->relocs != relstart)
4865 free (relstart);
4866 }
4867
4868 if (locsyms != NULL
4869 && (symtab_hdr->contents != (unsigned char *) locsyms))
4870 {
4871 if (!info->keep_memory)
4872 free (locsyms);
4873 else
4874 symtab_hdr->contents = (unsigned char *) locsyms;
4875 }
4876 }
4877 return TRUE;
4878 }
4879 \f
4880 /* Return true if we have dynamic relocs that apply to read-only sections. */
4881
4882 static bfd_boolean
4883 readonly_dynrelocs (struct elf_link_hash_entry *h)
4884 {
4885 struct ppc_elf_dyn_relocs *p;
4886
4887 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4888 {
4889 asection *s = p->sec->output_section;
4890
4891 if (s != NULL
4892 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4893 == (SEC_READONLY | SEC_ALLOC)))
4894 return TRUE;
4895 }
4896 return FALSE;
4897 }
4898
4899 /* Adjust a symbol defined by a dynamic object and referenced by a
4900 regular object. The current definition is in some section of the
4901 dynamic object, but we're not including those sections. We have to
4902 change the definition to something the rest of the link can
4903 understand. */
4904
4905 static bfd_boolean
4906 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4907 struct elf_link_hash_entry *h)
4908 {
4909 struct ppc_elf_link_hash_table *htab;
4910 asection *s;
4911
4912 #ifdef DEBUG
4913 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4914 h->root.root.string);
4915 #endif
4916
4917 /* Make sure we know what is going on here. */
4918 htab = ppc_elf_hash_table (info);
4919 BFD_ASSERT (htab->elf.dynobj != NULL
4920 && (h->needs_plt
4921 || h->type == STT_GNU_IFUNC
4922 || h->u.weakdef != NULL
4923 || (h->def_dynamic
4924 && h->ref_regular
4925 && !h->def_regular)));
4926
4927 /* Deal with function syms. */
4928 if (h->type == STT_FUNC
4929 || h->type == STT_GNU_IFUNC
4930 || h->needs_plt)
4931 {
4932 /* Clear procedure linkage table information for any symbol that
4933 won't need a .plt entry. */
4934 struct plt_entry *ent;
4935 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4936 if (ent->plt.refcount > 0)
4937 break;
4938 if (ent == NULL
4939 || (h->type != STT_GNU_IFUNC
4940 && (SYMBOL_CALLS_LOCAL (info, h)
4941 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4942 && h->root.type == bfd_link_hash_undefweak))))
4943 {
4944 /* A PLT entry is not required/allowed when:
4945
4946 1. We are not using ld.so; because then the PLT entry
4947 can't be set up, so we can't use one. In this case,
4948 ppc_elf_adjust_dynamic_symbol won't even be called.
4949
4950 2. GC has rendered the entry unused.
4951
4952 3. We know for certain that a call to this symbol
4953 will go to this object, or will remain undefined. */
4954 h->plt.plist = NULL;
4955 h->needs_plt = 0;
4956 }
4957 else
4958 {
4959 /* After adjust_dynamic_symbol, non_got_ref set in the
4960 non-shared case means that we have allocated space in
4961 .dynbss for the symbol and thus dyn_relocs for this
4962 symbol should be discarded.
4963 If we get here we know we are making a PLT entry for this
4964 symbol, and in an executable we'd normally resolve
4965 relocations against this symbol to the PLT entry. Allow
4966 dynamic relocs if the reference is weak, and the dynamic
4967 relocs will not cause text relocation. */
4968 if (!h->ref_regular_nonweak
4969 && h->non_got_ref
4970 && h->type != STT_GNU_IFUNC
4971 && !htab->is_vxworks
4972 && !ppc_elf_hash_entry (h)->has_sda_refs
4973 && !readonly_dynrelocs (h))
4974 h->non_got_ref = 0;
4975 }
4976 return TRUE;
4977 }
4978 else
4979 h->plt.plist = NULL;
4980
4981 /* If this is a weak symbol, and there is a real definition, the
4982 processor independent code will have arranged for us to see the
4983 real definition first, and we can just use the same value. */
4984 if (h->u.weakdef != NULL)
4985 {
4986 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4987 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4988 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4989 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4990 if (ELIMINATE_COPY_RELOCS)
4991 h->non_got_ref = h->u.weakdef->non_got_ref;
4992 return TRUE;
4993 }
4994
4995 /* This is a reference to a symbol defined by a dynamic object which
4996 is not a function. */
4997
4998 /* If we are creating a shared library, we must presume that the
4999 only references to the symbol are via the global offset table.
5000 For such cases we need not do anything here; the relocations will
5001 be handled correctly by relocate_section. */
5002 if (info->shared)
5003 return TRUE;
5004
5005 /* If there are no references to this symbol that do not use the
5006 GOT, we don't need to generate a copy reloc. */
5007 if (!h->non_got_ref)
5008 return TRUE;
5009
5010 /* If we didn't find any dynamic relocs in read-only sections, then
5011 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5012 We can't do this if there are any small data relocations. This
5013 doesn't work on VxWorks, where we can not have dynamic
5014 relocations (other than copy and jump slot relocations) in an
5015 executable. */
5016 if (ELIMINATE_COPY_RELOCS
5017 && !ppc_elf_hash_entry (h)->has_sda_refs
5018 && !htab->is_vxworks
5019 && !h->def_regular
5020 && !readonly_dynrelocs (h))
5021 {
5022 h->non_got_ref = 0;
5023 return TRUE;
5024 }
5025
5026 if (h->size == 0)
5027 {
5028 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5029 h->root.root.string);
5030 return TRUE;
5031 }
5032
5033 /* We must allocate the symbol in our .dynbss section, which will
5034 become part of the .bss section of the executable. There will be
5035 an entry for this symbol in the .dynsym section. The dynamic
5036 object will contain position independent code, so all references
5037 from the dynamic object to this symbol will go through the global
5038 offset table. The dynamic linker will use the .dynsym entry to
5039 determine the address it must put in the global offset table, so
5040 both the dynamic object and the regular object will refer to the
5041 same memory location for the variable.
5042
5043 Of course, if the symbol is referenced using SDAREL relocs, we
5044 must instead allocate it in .sbss. */
5045
5046 if (ppc_elf_hash_entry (h)->has_sda_refs)
5047 s = htab->dynsbss;
5048 else
5049 s = htab->dynbss;
5050 BFD_ASSERT (s != NULL);
5051
5052 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5053 copy the initial value out of the dynamic object and into the
5054 runtime process image. We need to remember the offset into the
5055 .rela.bss section we are going to use. */
5056 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5057 {
5058 asection *srel;
5059
5060 if (ppc_elf_hash_entry (h)->has_sda_refs)
5061 srel = htab->relsbss;
5062 else
5063 srel = htab->relbss;
5064 BFD_ASSERT (srel != NULL);
5065 srel->size += sizeof (Elf32_External_Rela);
5066 h->needs_copy = 1;
5067 }
5068
5069 return _bfd_elf_adjust_dynamic_copy (h, s);
5070 }
5071 \f
5072 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5073 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5074 specifying the addend on the plt relocation. For -fpic code, the sym
5075 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5076 xxxxxxxx.got2.plt_pic32.<callee>. */
5077
5078 static bfd_boolean
5079 add_stub_sym (struct plt_entry *ent,
5080 struct elf_link_hash_entry *h,
5081 struct bfd_link_info *info)
5082 {
5083 struct elf_link_hash_entry *sh;
5084 size_t len1, len2, len3;
5085 char *name;
5086 const char *stub;
5087 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5088
5089 if (info->shared)
5090 stub = ".plt_pic32.";
5091 else
5092 stub = ".plt_call32.";
5093
5094 len1 = strlen (h->root.root.string);
5095 len2 = strlen (stub);
5096 len3 = 0;
5097 if (ent->sec)
5098 len3 = strlen (ent->sec->name);
5099 name = bfd_malloc (len1 + len2 + len3 + 9);
5100 if (name == NULL)
5101 return FALSE;
5102 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5103 if (ent->sec)
5104 memcpy (name + 8, ent->sec->name, len3);
5105 memcpy (name + 8 + len3, stub, len2);
5106 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5107 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5108 if (sh == NULL)
5109 return FALSE;
5110 if (sh->root.type == bfd_link_hash_new)
5111 {
5112 sh->root.type = bfd_link_hash_defined;
5113 sh->root.u.def.section = htab->glink;
5114 sh->root.u.def.value = ent->glink_offset;
5115 sh->ref_regular = 1;
5116 sh->def_regular = 1;
5117 sh->ref_regular_nonweak = 1;
5118 sh->forced_local = 1;
5119 sh->non_elf = 0;
5120 }
5121 return TRUE;
5122 }
5123
5124 /* Allocate NEED contiguous space in .got, and return the offset.
5125 Handles allocation of the got header when crossing 32k. */
5126
5127 static bfd_vma
5128 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5129 {
5130 bfd_vma where;
5131 unsigned int max_before_header;
5132
5133 if (htab->plt_type == PLT_VXWORKS)
5134 {
5135 where = htab->got->size;
5136 htab->got->size += need;
5137 }
5138 else
5139 {
5140 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5141 if (need <= htab->got_gap)
5142 {
5143 where = max_before_header - htab->got_gap;
5144 htab->got_gap -= need;
5145 }
5146 else
5147 {
5148 if (htab->got->size + need > max_before_header
5149 && htab->got->size <= max_before_header)
5150 {
5151 htab->got_gap = max_before_header - htab->got->size;
5152 htab->got->size = max_before_header + htab->got_header_size;
5153 }
5154 where = htab->got->size;
5155 htab->got->size += need;
5156 }
5157 }
5158 return where;
5159 }
5160
5161 /* Allocate space in associated reloc sections for dynamic relocs. */
5162
5163 static bfd_boolean
5164 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5165 {
5166 struct bfd_link_info *info = inf;
5167 struct ppc_elf_link_hash_entry *eh;
5168 struct ppc_elf_link_hash_table *htab;
5169 struct ppc_elf_dyn_relocs *p;
5170
5171 if (h->root.type == bfd_link_hash_indirect)
5172 return TRUE;
5173
5174 if (h->root.type == bfd_link_hash_warning)
5175 /* When warning symbols are created, they **replace** the "real"
5176 entry in the hash table, thus we never get to see the real
5177 symbol in a hash traversal. So look at it now. */
5178 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5179
5180 htab = ppc_elf_hash_table (info);
5181 if (htab->elf.dynamic_sections_created
5182 || h->type == STT_GNU_IFUNC)
5183 {
5184 struct plt_entry *ent;
5185 bfd_boolean doneone = FALSE;
5186 bfd_vma plt_offset = 0, glink_offset = 0;
5187 bfd_boolean dyn;
5188
5189 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5190 if (ent->plt.refcount > 0)
5191 {
5192 /* Make sure this symbol is output as a dynamic symbol. */
5193 if (h->dynindx == -1
5194 && !h->forced_local
5195 && !h->def_regular
5196 && htab->elf.dynamic_sections_created)
5197 {
5198 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5199 return FALSE;
5200 }
5201
5202 dyn = htab->elf.dynamic_sections_created;
5203 if (info->shared
5204 || h->type == STT_GNU_IFUNC
5205 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5206 {
5207 asection *s = htab->plt;
5208 if (!dyn || h->dynindx == -1)
5209 s = htab->iplt;
5210
5211 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5212 {
5213 if (!doneone)
5214 {
5215 plt_offset = s->size;
5216 s->size += 4;
5217 }
5218 ent->plt.offset = plt_offset;
5219
5220 s = htab->glink;
5221 if (!doneone || info->shared)
5222 {
5223 glink_offset = s->size;
5224 s->size += GLINK_ENTRY_SIZE;
5225 if (h == htab->tls_get_addr
5226 && !htab->no_tls_get_addr_opt)
5227 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5228 }
5229 if (!doneone
5230 && !info->shared
5231 && h->def_dynamic
5232 && !h->def_regular)
5233 {
5234 h->root.u.def.section = s;
5235 h->root.u.def.value = glink_offset;
5236 }
5237 ent->glink_offset = glink_offset;
5238
5239 if (htab->emit_stub_syms
5240 && !add_stub_sym (ent, h, info))
5241 return FALSE;
5242 }
5243 else
5244 {
5245 if (!doneone)
5246 {
5247 /* If this is the first .plt entry, make room
5248 for the special first entry. */
5249 if (s->size == 0)
5250 s->size += htab->plt_initial_entry_size;
5251
5252 /* The PowerPC PLT is actually composed of two
5253 parts, the first part is 2 words (for a load
5254 and a jump), and then there is a remaining
5255 word available at the end. */
5256 plt_offset = (htab->plt_initial_entry_size
5257 + (htab->plt_slot_size
5258 * ((s->size
5259 - htab->plt_initial_entry_size)
5260 / htab->plt_entry_size)));
5261
5262 /* If this symbol is not defined in a regular
5263 file, and we are not generating a shared
5264 library, then set the symbol to this location
5265 in the .plt. This is to avoid text
5266 relocations, and is required to make
5267 function pointers compare as equal between
5268 the normal executable and the shared library. */
5269 if (! info->shared
5270 && h->def_dynamic
5271 && !h->def_regular)
5272 {
5273 h->root.u.def.section = s;
5274 h->root.u.def.value = plt_offset;
5275 }
5276
5277 /* Make room for this entry. */
5278 s->size += htab->plt_entry_size;
5279 /* After the 8192nd entry, room for two entries
5280 is allocated. */
5281 if (htab->plt_type == PLT_OLD
5282 && (s->size - htab->plt_initial_entry_size)
5283 / htab->plt_entry_size
5284 > PLT_NUM_SINGLE_ENTRIES)
5285 s->size += htab->plt_entry_size;
5286 }
5287 ent->plt.offset = plt_offset;
5288 }
5289
5290 /* We also need to make an entry in the .rela.plt section. */
5291 if (!doneone)
5292 {
5293 if (!htab->elf.dynamic_sections_created
5294 || h->dynindx == -1)
5295 htab->reliplt->size += sizeof (Elf32_External_Rela);
5296 else
5297 {
5298 htab->relplt->size += sizeof (Elf32_External_Rela);
5299
5300 if (htab->plt_type == PLT_VXWORKS)
5301 {
5302 /* Allocate space for the unloaded relocations. */
5303 if (!info->shared
5304 && htab->elf.dynamic_sections_created)
5305 {
5306 if (ent->plt.offset
5307 == (bfd_vma) htab->plt_initial_entry_size)
5308 {
5309 htab->srelplt2->size
5310 += (sizeof (Elf32_External_Rela)
5311 * VXWORKS_PLTRESOLVE_RELOCS);
5312 }
5313
5314 htab->srelplt2->size
5315 += (sizeof (Elf32_External_Rela)
5316 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5317 }
5318
5319 /* Every PLT entry has an associated GOT entry in
5320 .got.plt. */
5321 htab->sgotplt->size += 4;
5322 }
5323 }
5324 doneone = TRUE;
5325 }
5326 }
5327 else
5328 ent->plt.offset = (bfd_vma) -1;
5329 }
5330 else
5331 ent->plt.offset = (bfd_vma) -1;
5332
5333 if (!doneone)
5334 {
5335 h->plt.plist = NULL;
5336 h->needs_plt = 0;
5337 }
5338 }
5339 else
5340 {
5341 h->plt.plist = NULL;
5342 h->needs_plt = 0;
5343 }
5344
5345 eh = (struct ppc_elf_link_hash_entry *) h;
5346 if (eh->elf.got.refcount > 0)
5347 {
5348 bfd_boolean dyn;
5349 unsigned int need;
5350
5351 /* Make sure this symbol is output as a dynamic symbol. */
5352 if (eh->elf.dynindx == -1
5353 && !eh->elf.forced_local
5354 && eh->elf.type != STT_GNU_IFUNC
5355 && htab->elf.dynamic_sections_created)
5356 {
5357 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5358 return FALSE;
5359 }
5360
5361 need = 0;
5362 if ((eh->tls_mask & TLS_TLS) != 0)
5363 {
5364 if ((eh->tls_mask & TLS_LD) != 0)
5365 {
5366 if (!eh->elf.def_dynamic)
5367 /* We'll just use htab->tlsld_got.offset. This should
5368 always be the case. It's a little odd if we have
5369 a local dynamic reloc against a non-local symbol. */
5370 htab->tlsld_got.refcount += 1;
5371 else
5372 need += 8;
5373 }
5374 if ((eh->tls_mask & TLS_GD) != 0)
5375 need += 8;
5376 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5377 need += 4;
5378 if ((eh->tls_mask & TLS_DTPREL) != 0)
5379 need += 4;
5380 }
5381 else
5382 need += 4;
5383 if (need == 0)
5384 eh->elf.got.offset = (bfd_vma) -1;
5385 else
5386 {
5387 eh->elf.got.offset = allocate_got (htab, need);
5388 dyn = htab->elf.dynamic_sections_created;
5389 if ((info->shared
5390 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5391 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5392 || eh->elf.root.type != bfd_link_hash_undefweak))
5393 {
5394 asection *rsec = htab->relgot;
5395 /* All the entries we allocated need relocs.
5396 Except LD only needs one. */
5397 if ((eh->tls_mask & TLS_LD) != 0
5398 && eh->elf.def_dynamic)
5399 need -= 4;
5400 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5401 }
5402 }
5403 }
5404 else
5405 eh->elf.got.offset = (bfd_vma) -1;
5406
5407 if (eh->dyn_relocs == NULL
5408 || !htab->elf.dynamic_sections_created)
5409 return TRUE;
5410
5411 /* In the shared -Bsymbolic case, discard space allocated for
5412 dynamic pc-relative relocs against symbols which turn out to be
5413 defined in regular objects. For the normal shared case, discard
5414 space for relocs that have become local due to symbol visibility
5415 changes. */
5416
5417 if (info->shared)
5418 {
5419 /* Relocs that use pc_count are those that appear on a call insn,
5420 or certain REL relocs (see must_be_dyn_reloc) that can be
5421 generated via assembly. We want calls to protected symbols to
5422 resolve directly to the function rather than going via the plt.
5423 If people want function pointer comparisons to work as expected
5424 then they should avoid writing weird assembly. */
5425 if (SYMBOL_CALLS_LOCAL (info, h))
5426 {
5427 struct ppc_elf_dyn_relocs **pp;
5428
5429 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5430 {
5431 p->count -= p->pc_count;
5432 p->pc_count = 0;
5433 if (p->count == 0)
5434 *pp = p->next;
5435 else
5436 pp = &p->next;
5437 }
5438 }
5439
5440 if (htab->is_vxworks)
5441 {
5442 struct ppc_elf_dyn_relocs **pp;
5443
5444 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5445 {
5446 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5447 *pp = p->next;
5448 else
5449 pp = &p->next;
5450 }
5451 }
5452
5453 /* Discard relocs on undefined symbols that must be local. */
5454 if (eh->dyn_relocs != NULL
5455 && h->root.type == bfd_link_hash_undefined
5456 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5457 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5458 eh->dyn_relocs = NULL;
5459
5460 /* Also discard relocs on undefined weak syms with non-default
5461 visibility. */
5462 if (eh->dyn_relocs != NULL
5463 && h->root.type == bfd_link_hash_undefweak)
5464 {
5465 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5466 eh->dyn_relocs = NULL;
5467
5468 /* Make sure undefined weak symbols are output as a dynamic
5469 symbol in PIEs. */
5470 else if (h->dynindx == -1
5471 && !h->forced_local
5472 && !h->def_regular)
5473 {
5474 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5475 return FALSE;
5476 }
5477 }
5478 }
5479 else if (ELIMINATE_COPY_RELOCS)
5480 {
5481 /* For the non-shared case, discard space for relocs against
5482 symbols which turn out to need copy relocs or are not
5483 dynamic. */
5484
5485 if (!h->non_got_ref
5486 && !h->def_regular)
5487 {
5488 /* Make sure this symbol is output as a dynamic symbol.
5489 Undefined weak syms won't yet be marked as dynamic. */
5490 if (h->dynindx == -1
5491 && !h->forced_local)
5492 {
5493 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5494 return FALSE;
5495 }
5496
5497 /* If that succeeded, we know we'll be keeping all the
5498 relocs. */
5499 if (h->dynindx != -1)
5500 goto keep;
5501 }
5502
5503 eh->dyn_relocs = NULL;
5504
5505 keep: ;
5506 }
5507
5508 /* Finally, allocate space. */
5509 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5510 {
5511 asection *sreloc = elf_section_data (p->sec)->sreloc;
5512 if (!htab->elf.dynamic_sections_created)
5513 sreloc = htab->reliplt;
5514 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5515 }
5516
5517 return TRUE;
5518 }
5519
5520 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5521 read-only sections. */
5522
5523 static bfd_boolean
5524 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5525 {
5526 if (h->root.type == bfd_link_hash_indirect)
5527 return TRUE;
5528
5529 if (h->root.type == bfd_link_hash_warning)
5530 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5531
5532 if (readonly_dynrelocs (h))
5533 {
5534 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5535
5536 /* Not an error, just cut short the traversal. */
5537 return FALSE;
5538 }
5539 return TRUE;
5540 }
5541
5542 /* Set the sizes of the dynamic sections. */
5543
5544 static bfd_boolean
5545 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5546 struct bfd_link_info *info)
5547 {
5548 struct ppc_elf_link_hash_table *htab;
5549 asection *s;
5550 bfd_boolean relocs;
5551 bfd *ibfd;
5552
5553 #ifdef DEBUG
5554 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5555 #endif
5556
5557 htab = ppc_elf_hash_table (info);
5558 BFD_ASSERT (htab->elf.dynobj != NULL);
5559
5560 if (elf_hash_table (info)->dynamic_sections_created)
5561 {
5562 /* Set the contents of the .interp section to the interpreter. */
5563 if (info->executable)
5564 {
5565 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5566 BFD_ASSERT (s != NULL);
5567 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5568 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5569 }
5570 }
5571
5572 if (htab->plt_type == PLT_OLD)
5573 htab->got_header_size = 16;
5574 else if (htab->plt_type == PLT_NEW)
5575 htab->got_header_size = 12;
5576
5577 /* Set up .got offsets for local syms, and space for local dynamic
5578 relocs. */
5579 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5580 {
5581 bfd_signed_vma *local_got;
5582 bfd_signed_vma *end_local_got;
5583 struct plt_entry **local_plt;
5584 struct plt_entry **end_local_plt;
5585 char *lgot_masks;
5586 bfd_size_type locsymcount;
5587 Elf_Internal_Shdr *symtab_hdr;
5588
5589 if (!is_ppc_elf (ibfd))
5590 continue;
5591
5592 for (s = ibfd->sections; s != NULL; s = s->next)
5593 {
5594 struct ppc_elf_dyn_relocs *p;
5595
5596 for (p = ((struct ppc_elf_dyn_relocs *)
5597 elf_section_data (s)->local_dynrel);
5598 p != NULL;
5599 p = p->next)
5600 {
5601 if (!bfd_is_abs_section (p->sec)
5602 && bfd_is_abs_section (p->sec->output_section))
5603 {
5604 /* Input section has been discarded, either because
5605 it is a copy of a linkonce section or due to
5606 linker script /DISCARD/, so we'll be discarding
5607 the relocs too. */
5608 }
5609 else if (htab->is_vxworks
5610 && strcmp (p->sec->output_section->name,
5611 ".tls_vars") == 0)
5612 {
5613 /* Relocations in vxworks .tls_vars sections are
5614 handled specially by the loader. */
5615 }
5616 else if (p->count != 0)
5617 {
5618 asection *sreloc = elf_section_data (p->sec)->sreloc;
5619 if (!htab->elf.dynamic_sections_created)
5620 sreloc = htab->reliplt;
5621 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5622 if ((p->sec->output_section->flags
5623 & (SEC_READONLY | SEC_ALLOC))
5624 == (SEC_READONLY | SEC_ALLOC))
5625 info->flags |= DF_TEXTREL;
5626 }
5627 }
5628 }
5629
5630 local_got = elf_local_got_refcounts (ibfd);
5631 if (!local_got)
5632 continue;
5633
5634 symtab_hdr = &elf_symtab_hdr (ibfd);
5635 locsymcount = symtab_hdr->sh_info;
5636 end_local_got = local_got + locsymcount;
5637 local_plt = (struct plt_entry **) end_local_got;
5638 end_local_plt = local_plt + locsymcount;
5639 lgot_masks = (char *) end_local_plt;
5640
5641 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5642 if (*local_got > 0)
5643 {
5644 unsigned int need = 0;
5645 if ((*lgot_masks & TLS_TLS) != 0)
5646 {
5647 if ((*lgot_masks & TLS_GD) != 0)
5648 need += 8;
5649 if ((*lgot_masks & TLS_LD) != 0)
5650 htab->tlsld_got.refcount += 1;
5651 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5652 need += 4;
5653 if ((*lgot_masks & TLS_DTPREL) != 0)
5654 need += 4;
5655 }
5656 else
5657 need += 4;
5658 if (need == 0)
5659 *local_got = (bfd_vma) -1;
5660 else
5661 {
5662 *local_got = allocate_got (htab, need);
5663 if (info->shared)
5664 htab->relgot->size += (need
5665 * (sizeof (Elf32_External_Rela) / 4));
5666 }
5667 }
5668 else
5669 *local_got = (bfd_vma) -1;
5670
5671 if (htab->is_vxworks)
5672 continue;
5673
5674 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5675 for (; local_plt < end_local_plt; ++local_plt)
5676 {
5677 struct plt_entry *ent;
5678 bfd_boolean doneone = FALSE;
5679 bfd_vma plt_offset = 0, glink_offset = 0;
5680
5681 for (ent = *local_plt; ent != NULL; ent = ent->next)
5682 if (ent->plt.refcount > 0)
5683 {
5684 s = htab->iplt;
5685
5686 if (!doneone)
5687 {
5688 plt_offset = s->size;
5689 s->size += 4;
5690 }
5691 ent->plt.offset = plt_offset;
5692
5693 s = htab->glink;
5694 if (!doneone || info->shared)
5695 {
5696 glink_offset = s->size;
5697 s->size += GLINK_ENTRY_SIZE;
5698 }
5699 ent->glink_offset = glink_offset;
5700
5701 if (!doneone)
5702 {
5703 htab->reliplt->size += sizeof (Elf32_External_Rela);
5704 doneone = TRUE;
5705 }
5706 }
5707 else
5708 ent->plt.offset = (bfd_vma) -1;
5709 }
5710 }
5711
5712 /* Allocate space for global sym dynamic relocs. */
5713 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5714
5715 if (htab->tlsld_got.refcount > 0)
5716 {
5717 htab->tlsld_got.offset = allocate_got (htab, 8);
5718 if (info->shared)
5719 htab->relgot->size += sizeof (Elf32_External_Rela);
5720 }
5721 else
5722 htab->tlsld_got.offset = (bfd_vma) -1;
5723
5724 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5725 {
5726 unsigned int g_o_t = 32768;
5727
5728 /* If we haven't allocated the header, do so now. When we get here,
5729 for old plt/got the got size will be 0 to 32764 (not allocated),
5730 or 32780 to 65536 (header allocated). For new plt/got, the
5731 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5732 if (htab->got->size <= 32768)
5733 {
5734 g_o_t = htab->got->size;
5735 if (htab->plt_type == PLT_OLD)
5736 g_o_t += 4;
5737 htab->got->size += htab->got_header_size;
5738 }
5739
5740 htab->elf.hgot->root.u.def.value = g_o_t;
5741 }
5742 if (info->shared)
5743 {
5744 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5745 if (sda != NULL
5746 && !(sda->root.type == bfd_link_hash_defined
5747 || sda->root.type == bfd_link_hash_defweak))
5748 {
5749 sda->root.type = bfd_link_hash_defined;
5750 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5751 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5752 }
5753 }
5754
5755 if (htab->glink != NULL
5756 && htab->glink->size != 0
5757 && htab->elf.dynamic_sections_created)
5758 {
5759 htab->glink_pltresolve = htab->glink->size;
5760 /* Space for the branch table. */
5761 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5762 /* Pad out to align the start of PLTresolve. */
5763 htab->glink->size += -htab->glink->size & 15;
5764 htab->glink->size += GLINK_PLTRESOLVE;
5765
5766 if (htab->emit_stub_syms)
5767 {
5768 struct elf_link_hash_entry *sh;
5769 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5770 TRUE, FALSE, FALSE);
5771 if (sh == NULL)
5772 return FALSE;
5773 if (sh->root.type == bfd_link_hash_new)
5774 {
5775 sh->root.type = bfd_link_hash_defined;
5776 sh->root.u.def.section = htab->glink;
5777 sh->root.u.def.value = htab->glink_pltresolve;
5778 sh->ref_regular = 1;
5779 sh->def_regular = 1;
5780 sh->ref_regular_nonweak = 1;
5781 sh->forced_local = 1;
5782 sh->non_elf = 0;
5783 }
5784 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5785 TRUE, FALSE, FALSE);
5786 if (sh == NULL)
5787 return FALSE;
5788 if (sh->root.type == bfd_link_hash_new)
5789 {
5790 sh->root.type = bfd_link_hash_defined;
5791 sh->root.u.def.section = htab->glink;
5792 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5793 sh->ref_regular = 1;
5794 sh->def_regular = 1;
5795 sh->ref_regular_nonweak = 1;
5796 sh->forced_local = 1;
5797 sh->non_elf = 0;
5798 }
5799 }
5800 }
5801
5802 /* We've now determined the sizes of the various dynamic sections.
5803 Allocate memory for them. */
5804 relocs = FALSE;
5805 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5806 {
5807 bfd_boolean strip_section = TRUE;
5808
5809 if ((s->flags & SEC_LINKER_CREATED) == 0)
5810 continue;
5811
5812 if (s == htab->plt
5813 || s == htab->got)
5814 {
5815 /* We'd like to strip these sections if they aren't needed, but if
5816 we've exported dynamic symbols from them we must leave them.
5817 It's too late to tell BFD to get rid of the symbols. */
5818 if (htab->elf.hplt != NULL)
5819 strip_section = FALSE;
5820 /* Strip this section if we don't need it; see the
5821 comment below. */
5822 }
5823 else if (s == htab->iplt
5824 || s == htab->glink
5825 || s == htab->sgotplt
5826 || s == htab->sbss
5827 || s == htab->dynbss
5828 || s == htab->dynsbss
5829 || s == htab->sdata[0].section
5830 || s == htab->sdata[1].section)
5831 {
5832 /* Strip these too. */
5833 }
5834 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5835 {
5836 if (s->size != 0)
5837 {
5838 /* Remember whether there are any relocation sections. */
5839 relocs = TRUE;
5840
5841 /* We use the reloc_count field as a counter if we need
5842 to copy relocs into the output file. */
5843 s->reloc_count = 0;
5844 }
5845 }
5846 else
5847 {
5848 /* It's not one of our sections, so don't allocate space. */
5849 continue;
5850 }
5851
5852 if (s->size == 0 && strip_section)
5853 {
5854 /* If we don't need this section, strip it from the
5855 output file. This is mostly to handle .rela.bss and
5856 .rela.plt. We must create both sections in
5857 create_dynamic_sections, because they must be created
5858 before the linker maps input sections to output
5859 sections. The linker does that before
5860 adjust_dynamic_symbol is called, and it is that
5861 function which decides whether anything needs to go
5862 into these sections. */
5863 s->flags |= SEC_EXCLUDE;
5864 continue;
5865 }
5866
5867 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5868 continue;
5869
5870 /* Allocate memory for the section contents. */
5871 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5872 if (s->contents == NULL)
5873 return FALSE;
5874 }
5875
5876 if (htab->elf.dynamic_sections_created)
5877 {
5878 /* Add some entries to the .dynamic section. We fill in the
5879 values later, in ppc_elf_finish_dynamic_sections, but we
5880 must add the entries now so that we get the correct size for
5881 the .dynamic section. The DT_DEBUG entry is filled in by the
5882 dynamic linker and used by the debugger. */
5883 #define add_dynamic_entry(TAG, VAL) \
5884 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5885
5886 if (info->executable)
5887 {
5888 if (!add_dynamic_entry (DT_DEBUG, 0))
5889 return FALSE;
5890 }
5891
5892 if (htab->plt != NULL && htab->plt->size != 0)
5893 {
5894 if (!add_dynamic_entry (DT_PLTGOT, 0)
5895 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5896 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5897 || !add_dynamic_entry (DT_JMPREL, 0))
5898 return FALSE;
5899 }
5900
5901 if (htab->glink != NULL && htab->glink->size != 0)
5902 {
5903 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5904 return FALSE;
5905 if (!htab->no_tls_get_addr_opt
5906 && htab->tls_get_addr != NULL
5907 && htab->tls_get_addr->plt.plist != NULL
5908 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5909 return FALSE;
5910 }
5911
5912 if (relocs)
5913 {
5914 if (!add_dynamic_entry (DT_RELA, 0)
5915 || !add_dynamic_entry (DT_RELASZ, 0)
5916 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5917 return FALSE;
5918 }
5919
5920 /* If any dynamic relocs apply to a read-only section, then we
5921 need a DT_TEXTREL entry. */
5922 if ((info->flags & DF_TEXTREL) == 0)
5923 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5924 info);
5925
5926 if ((info->flags & DF_TEXTREL) != 0)
5927 {
5928 if (!add_dynamic_entry (DT_TEXTREL, 0))
5929 return FALSE;
5930 }
5931 if (htab->is_vxworks
5932 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5933 return FALSE;
5934 }
5935 #undef add_dynamic_entry
5936
5937 return TRUE;
5938 }
5939
5940 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5941
5942 static bfd_boolean
5943 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5944 {
5945 if (h->plt.plist != NULL
5946 && !h->def_regular
5947 && (!h->pointer_equality_needed
5948 || !h->ref_regular_nonweak))
5949 return FALSE;
5950
5951 return _bfd_elf_hash_symbol (h);
5952 }
5953 \f
5954 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5955
5956 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5957 used for some functions that are allowed to break the ABI). */
5958 static const int shared_stub_entry[] =
5959 {
5960 0x7c0802a6, /* mflr 0 */
5961 0x429f0005, /* bcl 20, 31, .Lxxx */
5962 0x7d8802a6, /* mflr 12 */
5963 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5964 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5965 0x7c0803a6, /* mtlr 0 */
5966 0x7d8903a6, /* mtctr 12 */
5967 0x4e800420, /* bctr */
5968 };
5969
5970 static const int stub_entry[] =
5971 {
5972 0x3d800000, /* lis 12,xxx@ha */
5973 0x398c0000, /* addi 12,12,xxx@l */
5974 0x7d8903a6, /* mtctr 12 */
5975 0x4e800420, /* bctr */
5976 };
5977
5978 static bfd_boolean
5979 ppc_elf_relax_section (bfd *abfd,
5980 asection *isec,
5981 struct bfd_link_info *link_info,
5982 bfd_boolean *again)
5983 {
5984 struct one_fixup
5985 {
5986 struct one_fixup *next;
5987 asection *tsec;
5988 /* Final link, can use the symbol offset. For a
5989 relocatable link we use the symbol's index. */
5990 bfd_vma toff;
5991 bfd_vma trampoff;
5992 };
5993
5994 Elf_Internal_Shdr *symtab_hdr;
5995 bfd_byte *contents = NULL;
5996 Elf_Internal_Sym *isymbuf = NULL;
5997 Elf_Internal_Rela *internal_relocs = NULL;
5998 Elf_Internal_Rela *irel, *irelend;
5999 struct one_fixup *fixups = NULL;
6000 unsigned changes = 0;
6001 struct ppc_elf_link_hash_table *htab;
6002 bfd_size_type trampoff;
6003 asection *got2;
6004
6005 *again = FALSE;
6006
6007 /* Nothing to do if there are no relocations, and no need to do
6008 anything with non-alloc or non-code sections. */
6009 if ((isec->flags & SEC_ALLOC) == 0
6010 || (isec->flags & SEC_CODE) == 0
6011 || (isec->flags & SEC_RELOC) == 0
6012 || isec->reloc_count == 0)
6013 return TRUE;
6014
6015 /* We cannot represent the required PIC relocs in the output, so don't
6016 do anything. The linker doesn't support mixing -shared and -r
6017 anyway. */
6018 if (link_info->relocatable && link_info->shared)
6019 return TRUE;
6020
6021 trampoff = (isec->size + 3) & (bfd_vma) -4;
6022 /* Space for a branch around any trampolines. */
6023 trampoff += 4;
6024
6025 symtab_hdr = &elf_symtab_hdr (abfd);
6026
6027 /* Get a copy of the native relocations. */
6028 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6029 link_info->keep_memory);
6030 if (internal_relocs == NULL)
6031 goto error_return;
6032
6033 htab = ppc_elf_hash_table (link_info);
6034 got2 = bfd_get_section_by_name (abfd, ".got2");
6035
6036 irelend = internal_relocs + isec->reloc_count;
6037 for (irel = internal_relocs; irel < irelend; irel++)
6038 {
6039 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6040 bfd_vma toff, roff;
6041 asection *tsec;
6042 struct one_fixup *f;
6043 size_t insn_offset = 0;
6044 bfd_vma max_branch_offset, val;
6045 bfd_byte *hit_addr;
6046 unsigned long t0;
6047 struct elf_link_hash_entry *h;
6048 struct plt_entry **plist;
6049 unsigned char sym_type;
6050
6051 switch (r_type)
6052 {
6053 case R_PPC_REL24:
6054 case R_PPC_LOCAL24PC:
6055 case R_PPC_PLTREL24:
6056 max_branch_offset = 1 << 25;
6057 break;
6058
6059 case R_PPC_REL14:
6060 case R_PPC_REL14_BRTAKEN:
6061 case R_PPC_REL14_BRNTAKEN:
6062 max_branch_offset = 1 << 15;
6063 break;
6064
6065 default:
6066 continue;
6067 }
6068
6069 /* Get the value of the symbol referred to by the reloc. */
6070 h = NULL;
6071 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6072 {
6073 /* A local symbol. */
6074 Elf_Internal_Sym *isym;
6075
6076 /* Read this BFD's local symbols. */
6077 if (isymbuf == NULL)
6078 {
6079 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6080 if (isymbuf == NULL)
6081 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6082 symtab_hdr->sh_info, 0,
6083 NULL, NULL, NULL);
6084 if (isymbuf == 0)
6085 goto error_return;
6086 }
6087 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6088 if (isym->st_shndx == SHN_UNDEF)
6089 tsec = bfd_und_section_ptr;
6090 else if (isym->st_shndx == SHN_ABS)
6091 tsec = bfd_abs_section_ptr;
6092 else if (isym->st_shndx == SHN_COMMON)
6093 tsec = bfd_com_section_ptr;
6094 else
6095 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6096
6097 toff = isym->st_value;
6098 sym_type = ELF_ST_TYPE (isym->st_info);
6099 }
6100 else
6101 {
6102 /* Global symbol handling. */
6103 unsigned long indx;
6104
6105 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6106 h = elf_sym_hashes (abfd)[indx];
6107
6108 while (h->root.type == bfd_link_hash_indirect
6109 || h->root.type == bfd_link_hash_warning)
6110 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6111
6112 if (h->root.type == bfd_link_hash_defined
6113 || h->root.type == bfd_link_hash_defweak)
6114 {
6115 tsec = h->root.u.def.section;
6116 toff = h->root.u.def.value;
6117 }
6118 else if (h->root.type == bfd_link_hash_undefined
6119 || h->root.type == bfd_link_hash_undefweak)
6120 {
6121 tsec = bfd_und_section_ptr;
6122 toff = link_info->relocatable ? indx : 0;
6123 }
6124 else
6125 continue;
6126
6127 sym_type = h->type;
6128 }
6129
6130 /* The condition here under which we call find_plt_ent must
6131 match that in relocate_section. If we call find_plt_ent here
6132 but not in relocate_section, or vice versa, then the branch
6133 destination used here may be incorrect. */
6134 plist = NULL;
6135 if (h != NULL)
6136 {
6137 /* We know is_branch_reloc (r_type) is true. */
6138 if (h->type == STT_GNU_IFUNC
6139 || r_type == R_PPC_PLTREL24)
6140 plist = &h->plt.plist;
6141 }
6142 else if (sym_type == STT_GNU_IFUNC
6143 && elf_local_got_offsets (abfd) != NULL)
6144 {
6145 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6146 struct plt_entry **local_plt = (struct plt_entry **)
6147 (local_got_offsets + symtab_hdr->sh_info);
6148 plist = local_plt + ELF32_R_SYM (irel->r_info);
6149 }
6150 if (plist != NULL)
6151 {
6152 bfd_vma addend = 0;
6153 struct plt_entry *ent;
6154
6155 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6156 addend = irel->r_addend;
6157 ent = find_plt_ent (plist, got2, addend);
6158 if (ent != NULL)
6159 {
6160 if (htab->plt_type == PLT_NEW
6161 || h == NULL
6162 || !htab->elf.dynamic_sections_created
6163 || h->dynindx == -1)
6164 {
6165 tsec = htab->glink;
6166 toff = ent->glink_offset;
6167 }
6168 else
6169 {
6170 tsec = htab->plt;
6171 toff = ent->plt.offset;
6172 }
6173 }
6174 }
6175
6176 /* If the branch and target are in the same section, you have
6177 no hope of adding stubs. We'll error out later should the
6178 branch overflow. */
6179 if (tsec == isec)
6180 continue;
6181
6182 /* There probably isn't any reason to handle symbols in
6183 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6184 attribute for a code section, and we are only looking at
6185 branches. However, implement it correctly here as a
6186 reference for other target relax_section functions. */
6187 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6188 {
6189 /* At this stage in linking, no SEC_MERGE symbol has been
6190 adjusted, so all references to such symbols need to be
6191 passed through _bfd_merged_section_offset. (Later, in
6192 relocate_section, all SEC_MERGE symbols *except* for
6193 section symbols have been adjusted.)
6194
6195 gas may reduce relocations against symbols in SEC_MERGE
6196 sections to a relocation against the section symbol when
6197 the original addend was zero. When the reloc is against
6198 a section symbol we should include the addend in the
6199 offset passed to _bfd_merged_section_offset, since the
6200 location of interest is the original symbol. On the
6201 other hand, an access to "sym+addend" where "sym" is not
6202 a section symbol should not include the addend; Such an
6203 access is presumed to be an offset from "sym"; The
6204 location of interest is just "sym". */
6205 if (sym_type == STT_SECTION)
6206 toff += irel->r_addend;
6207
6208 toff = _bfd_merged_section_offset (abfd, &tsec,
6209 elf_section_data (tsec)->sec_info,
6210 toff);
6211
6212 if (sym_type != STT_SECTION)
6213 toff += irel->r_addend;
6214 }
6215 /* PLTREL24 addends are special. */
6216 else if (r_type != R_PPC_PLTREL24)
6217 toff += irel->r_addend;
6218
6219 /* Attempted -shared link of non-pic code loses. */
6220 if (tsec->output_section == NULL)
6221 continue;
6222
6223 roff = irel->r_offset;
6224
6225 /* If the branch is in range, no need to do anything. */
6226 if (tsec != bfd_und_section_ptr
6227 && (!link_info->relocatable
6228 /* A relocatable link may have sections moved during
6229 final link, so do not presume they remain in range. */
6230 || tsec->output_section == isec->output_section))
6231 {
6232 bfd_vma symaddr, reladdr;
6233
6234 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6235 reladdr = isec->output_section->vma + isec->output_offset + roff;
6236 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6237 continue;
6238 }
6239
6240 /* Look for an existing fixup to this address. */
6241 for (f = fixups; f ; f = f->next)
6242 if (f->tsec == tsec && f->toff == toff)
6243 break;
6244
6245 if (f == NULL)
6246 {
6247 size_t size;
6248 unsigned long stub_rtype;
6249
6250 val = trampoff - roff;
6251 if (val >= max_branch_offset)
6252 /* Oh dear, we can't reach a trampoline. Don't try to add
6253 one. We'll report an error later. */
6254 continue;
6255
6256 if (link_info->shared)
6257 {
6258 size = 4 * ARRAY_SIZE (shared_stub_entry);
6259 insn_offset = 12;
6260 }
6261 else
6262 {
6263 size = 4 * ARRAY_SIZE (stub_entry);
6264 insn_offset = 0;
6265 }
6266 stub_rtype = R_PPC_RELAX;
6267 if (tsec == htab->plt
6268 || tsec == htab->glink)
6269 {
6270 stub_rtype = R_PPC_RELAX_PLT;
6271 if (r_type == R_PPC_PLTREL24)
6272 stub_rtype = R_PPC_RELAX_PLTREL24;
6273 }
6274
6275 /* Hijack the old relocation. Since we need two
6276 relocations for this use a "composite" reloc. */
6277 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6278 stub_rtype);
6279 irel->r_offset = trampoff + insn_offset;
6280 if (r_type == R_PPC_PLTREL24
6281 && stub_rtype != R_PPC_RELAX_PLTREL24)
6282 irel->r_addend = 0;
6283
6284 /* Record the fixup so we don't do it again this section. */
6285 f = bfd_malloc (sizeof (*f));
6286 f->next = fixups;
6287 f->tsec = tsec;
6288 f->toff = toff;
6289 f->trampoff = trampoff;
6290 fixups = f;
6291
6292 trampoff += size;
6293 changes++;
6294 }
6295 else
6296 {
6297 val = f->trampoff - roff;
6298 if (val >= max_branch_offset)
6299 continue;
6300
6301 /* Nop out the reloc, since we're finalizing things here. */
6302 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6303 }
6304
6305 /* Get the section contents. */
6306 if (contents == NULL)
6307 {
6308 /* Get cached copy if it exists. */
6309 if (elf_section_data (isec)->this_hdr.contents != NULL)
6310 contents = elf_section_data (isec)->this_hdr.contents;
6311 else
6312 {
6313 /* Go get them off disk. */
6314 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6315 goto error_return;
6316 }
6317 }
6318
6319 /* Fix up the existing branch to hit the trampoline. */
6320 hit_addr = contents + roff;
6321 switch (r_type)
6322 {
6323 case R_PPC_REL24:
6324 case R_PPC_LOCAL24PC:
6325 case R_PPC_PLTREL24:
6326 t0 = bfd_get_32 (abfd, hit_addr);
6327 t0 &= ~0x3fffffc;
6328 t0 |= val & 0x3fffffc;
6329 bfd_put_32 (abfd, t0, hit_addr);
6330 break;
6331
6332 case R_PPC_REL14:
6333 case R_PPC_REL14_BRTAKEN:
6334 case R_PPC_REL14_BRNTAKEN:
6335 t0 = bfd_get_32 (abfd, hit_addr);
6336 t0 &= ~0xfffc;
6337 t0 |= val & 0xfffc;
6338 bfd_put_32 (abfd, t0, hit_addr);
6339 break;
6340 }
6341 }
6342
6343 /* Write out the trampolines. */
6344 if (fixups != NULL)
6345 {
6346 const int *stub;
6347 bfd_byte *dest;
6348 bfd_vma val;
6349 int i, size;
6350
6351 do
6352 {
6353 struct one_fixup *f = fixups;
6354 fixups = fixups->next;
6355 free (f);
6356 }
6357 while (fixups);
6358
6359 contents = bfd_realloc_or_free (contents, trampoff);
6360 if (contents == NULL)
6361 goto error_return;
6362
6363 isec->size = (isec->size + 3) & (bfd_vma) -4;
6364 /* Branch around the trampolines. */
6365 val = B + trampoff - isec->size;
6366 dest = contents + isec->size;
6367 isec->size = trampoff;
6368 bfd_put_32 (abfd, val, dest);
6369 dest += 4;
6370
6371 if (link_info->shared)
6372 {
6373 stub = shared_stub_entry;
6374 size = ARRAY_SIZE (shared_stub_entry);
6375 }
6376 else
6377 {
6378 stub = stub_entry;
6379 size = ARRAY_SIZE (stub_entry);
6380 }
6381
6382 i = 0;
6383 while (dest < contents + trampoff)
6384 {
6385 bfd_put_32 (abfd, stub[i], dest);
6386 i++;
6387 if (i == size)
6388 i = 0;
6389 dest += 4;
6390 }
6391 BFD_ASSERT (i == 0);
6392 }
6393
6394 if (isymbuf != NULL
6395 && symtab_hdr->contents != (unsigned char *) isymbuf)
6396 {
6397 if (! link_info->keep_memory)
6398 free (isymbuf);
6399 else
6400 {
6401 /* Cache the symbols for elf_link_input_bfd. */
6402 symtab_hdr->contents = (unsigned char *) isymbuf;
6403 }
6404 }
6405
6406 if (contents != NULL
6407 && elf_section_data (isec)->this_hdr.contents != contents)
6408 {
6409 if (!changes && !link_info->keep_memory)
6410 free (contents);
6411 else
6412 {
6413 /* Cache the section contents for elf_link_input_bfd. */
6414 elf_section_data (isec)->this_hdr.contents = contents;
6415 }
6416 }
6417
6418 if (changes != 0)
6419 {
6420 /* Append sufficient NOP relocs so we can write out relocation
6421 information for the trampolines. */
6422 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6423 * sizeof (*new_relocs));
6424 unsigned ix;
6425
6426 if (!new_relocs)
6427 goto error_return;
6428 memcpy (new_relocs, internal_relocs,
6429 isec->reloc_count * sizeof (*new_relocs));
6430 for (ix = changes; ix--;)
6431 {
6432 irel = new_relocs + ix + isec->reloc_count;
6433
6434 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6435 }
6436 if (internal_relocs != elf_section_data (isec)->relocs)
6437 free (internal_relocs);
6438 elf_section_data (isec)->relocs = new_relocs;
6439 isec->reloc_count += changes;
6440 elf_section_data (isec)->rel_hdr.sh_size
6441 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6442 }
6443 else if (elf_section_data (isec)->relocs != internal_relocs)
6444 free (internal_relocs);
6445
6446 *again = changes != 0;
6447 if (!*again && link_info->relocatable)
6448 {
6449 /* Convert the internal relax relocs to external form. */
6450 for (irel = internal_relocs; irel < irelend; irel++)
6451 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6452 {
6453 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6454
6455 /* Rewrite the reloc and convert one of the trailing nop
6456 relocs to describe this relocation. */
6457 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6458 /* The relocs are at the bottom 2 bytes */
6459 irel[0].r_offset += 2;
6460 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6461 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6462 irel[1].r_offset += 4;
6463 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6464 irel++;
6465 }
6466 }
6467
6468 return TRUE;
6469
6470 error_return:
6471 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6472 free (isymbuf);
6473 if (contents != NULL
6474 && elf_section_data (isec)->this_hdr.contents != contents)
6475 free (contents);
6476 if (internal_relocs != NULL
6477 && elf_section_data (isec)->relocs != internal_relocs)
6478 free (internal_relocs);
6479 return FALSE;
6480 }
6481 \f
6482 /* What to do when ld finds relocations against symbols defined in
6483 discarded sections. */
6484
6485 static unsigned int
6486 ppc_elf_action_discarded (asection *sec)
6487 {
6488 if (strcmp (".fixup", sec->name) == 0)
6489 return 0;
6490
6491 if (strcmp (".got2", sec->name) == 0)
6492 return 0;
6493
6494 return _bfd_elf_default_action_discarded (sec);
6495 }
6496 \f
6497 /* Fill in the address for a pointer generated in a linker section. */
6498
6499 static bfd_vma
6500 elf_finish_pointer_linker_section (bfd *input_bfd,
6501 elf_linker_section_t *lsect,
6502 struct elf_link_hash_entry *h,
6503 bfd_vma relocation,
6504 const Elf_Internal_Rela *rel)
6505 {
6506 elf_linker_section_pointers_t *linker_section_ptr;
6507
6508 BFD_ASSERT (lsect != NULL);
6509
6510 if (h != NULL)
6511 {
6512 /* Handle global symbol. */
6513 struct ppc_elf_link_hash_entry *eh;
6514
6515 eh = (struct ppc_elf_link_hash_entry *) h;
6516 BFD_ASSERT (eh->elf.def_regular);
6517 linker_section_ptr = eh->linker_section_pointer;
6518 }
6519 else
6520 {
6521 /* Handle local symbol. */
6522 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6523
6524 BFD_ASSERT (is_ppc_elf (input_bfd));
6525 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6526 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6527 }
6528
6529 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6530 rel->r_addend,
6531 lsect);
6532 BFD_ASSERT (linker_section_ptr != NULL);
6533
6534 /* Offset will always be a multiple of four, so use the bottom bit
6535 as a "written" flag. */
6536 if ((linker_section_ptr->offset & 1) == 0)
6537 {
6538 bfd_put_32 (lsect->section->owner,
6539 relocation + linker_section_ptr->addend,
6540 lsect->section->contents + linker_section_ptr->offset);
6541 linker_section_ptr->offset += 1;
6542 }
6543
6544 relocation = (lsect->section->output_section->vma
6545 + lsect->section->output_offset
6546 + linker_section_ptr->offset - 1
6547 - SYM_VAL (lsect->sym));
6548
6549 #ifdef DEBUG
6550 fprintf (stderr,
6551 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6552 lsect->name, (long) relocation, (long) relocation);
6553 #endif
6554
6555 return relocation;
6556 }
6557
6558 #define PPC_LO(v) ((v) & 0xffff)
6559 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6560 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6561
6562 static void
6563 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6564 struct bfd_link_info *info)
6565 {
6566 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6567 bfd *output_bfd = info->output_bfd;
6568 bfd_vma plt;
6569
6570 plt = ((ent->plt.offset & ~1)
6571 + plt_sec->output_section->vma
6572 + plt_sec->output_offset);
6573
6574 if (info->shared)
6575 {
6576 bfd_vma got = 0;
6577
6578 if (ent->addend >= 32768)
6579 got = (ent->addend
6580 + ent->sec->output_section->vma
6581 + ent->sec->output_offset);
6582 else if (htab->elf.hgot != NULL)
6583 got = SYM_VAL (htab->elf.hgot);
6584
6585 plt -= got;
6586
6587 if (plt + 0x8000 < 0x10000)
6588 {
6589 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6590 p += 4;
6591 bfd_put_32 (output_bfd, MTCTR_11, p);
6592 p += 4;
6593 bfd_put_32 (output_bfd, BCTR, p);
6594 p += 4;
6595 bfd_put_32 (output_bfd, NOP, p);
6596 p += 4;
6597 }
6598 else
6599 {
6600 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6601 p += 4;
6602 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6603 p += 4;
6604 bfd_put_32 (output_bfd, MTCTR_11, p);
6605 p += 4;
6606 bfd_put_32 (output_bfd, BCTR, p);
6607 p += 4;
6608 }
6609 }
6610 else
6611 {
6612 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6613 p += 4;
6614 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6615 p += 4;
6616 bfd_put_32 (output_bfd, MTCTR_11, p);
6617 p += 4;
6618 bfd_put_32 (output_bfd, BCTR, p);
6619 p += 4;
6620 }
6621 }
6622
6623 /* Return true if symbol is defined statically. */
6624
6625 static bfd_boolean
6626 is_static_defined (struct elf_link_hash_entry *h)
6627 {
6628 return ((h->root.type == bfd_link_hash_defined
6629 || h->root.type == bfd_link_hash_defweak)
6630 && h->root.u.def.section != NULL
6631 && h->root.u.def.section->output_section != NULL);
6632 }
6633
6634 /* If INSN is an opcode that may be used with an @tls operand, return
6635 the transformed insn for TLS optimisation, otherwise return 0. If
6636 REG is non-zero only match an insn with RB or RA equal to REG. */
6637
6638 unsigned int
6639 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6640 {
6641 unsigned int rtra;
6642
6643 if ((insn & (0x3f << 26)) != 31 << 26)
6644 return 0;
6645
6646 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6647 rtra = insn & ((1 << 26) - (1 << 16));
6648 else if (((insn >> 16) & 0x1f) == reg)
6649 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6650 else
6651 return 0;
6652
6653 if ((insn & (0x3ff << 1)) == 266 << 1)
6654 /* add -> addi. */
6655 insn = 14 << 26;
6656 else if ((insn & (0x1f << 1)) == 23 << 1
6657 && ((insn & (0x1f << 6)) < 14 << 6
6658 || ((insn & (0x1f << 6)) >= 16 << 6
6659 && (insn & (0x1f << 6)) < 24 << 6)))
6660 /* load and store indexed -> dform. */
6661 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6662 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6663 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6664 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6665 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6666 /* lwax -> lwa. */
6667 insn = (58 << 26) | 2;
6668 else
6669 return 0;
6670 insn |= rtra;
6671 return insn;
6672 }
6673
6674 /* If INSN is an opcode that may be used with an @tprel operand, return
6675 the transformed insn for an undefined weak symbol, ie. with the
6676 thread pointer REG operand removed. Otherwise return 0. */
6677
6678 unsigned int
6679 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6680 {
6681 if ((insn & (0x1f << 16)) == reg << 16
6682 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6683 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6684 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6685 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6686 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6687 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6688 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6689 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6690 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6691 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6692 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6693 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6694 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6695 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6696 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6697 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6698 && (insn & 3) != 1)
6699 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6700 && ((insn & 3) == 0 || (insn & 3) == 3))))
6701 {
6702 insn &= ~(0x1f << 16);
6703 }
6704 else if ((insn & (0x1f << 21)) == reg << 21
6705 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6706 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6707 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6708 {
6709 insn &= ~(0x1f << 21);
6710 insn |= (insn & (0x1f << 16)) << 5;
6711 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6712 insn -= 2 >> 26; /* convert to ori,oris */
6713 }
6714 else
6715 insn = 0;
6716 return insn;
6717 }
6718
6719 /* The RELOCATE_SECTION function is called by the ELF backend linker
6720 to handle the relocations for a section.
6721
6722 The relocs are always passed as Rela structures; if the section
6723 actually uses Rel structures, the r_addend field will always be
6724 zero.
6725
6726 This function is responsible for adjust the section contents as
6727 necessary, and (if using Rela relocs and generating a
6728 relocatable output file) adjusting the reloc addend as
6729 necessary.
6730
6731 This function does not have to worry about setting the reloc
6732 address or the reloc symbol index.
6733
6734 LOCAL_SYMS is a pointer to the swapped in local symbols.
6735
6736 LOCAL_SECTIONS is an array giving the section in the input file
6737 corresponding to the st_shndx field of each local symbol.
6738
6739 The global hash table entry for the global symbols can be found
6740 via elf_sym_hashes (input_bfd).
6741
6742 When generating relocatable output, this function must handle
6743 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6744 going to be the section symbol corresponding to the output
6745 section, which means that the addend must be adjusted
6746 accordingly. */
6747
6748 static bfd_boolean
6749 ppc_elf_relocate_section (bfd *output_bfd,
6750 struct bfd_link_info *info,
6751 bfd *input_bfd,
6752 asection *input_section,
6753 bfd_byte *contents,
6754 Elf_Internal_Rela *relocs,
6755 Elf_Internal_Sym *local_syms,
6756 asection **local_sections)
6757 {
6758 Elf_Internal_Shdr *symtab_hdr;
6759 struct elf_link_hash_entry **sym_hashes;
6760 struct ppc_elf_link_hash_table *htab;
6761 Elf_Internal_Rela *rel;
6762 Elf_Internal_Rela *relend;
6763 Elf_Internal_Rela outrel;
6764 asection *got2, *sreloc = NULL;
6765 bfd_vma *local_got_offsets;
6766 bfd_boolean ret = TRUE;
6767 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6768 bfd_boolean is_vxworks_tls;
6769
6770 #ifdef DEBUG
6771 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6772 "%ld relocations%s",
6773 input_bfd, input_section,
6774 (long) input_section->reloc_count,
6775 (info->relocatable) ? " (relocatable)" : "");
6776 #endif
6777
6778 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6779
6780 /* Initialize howto table if not already done. */
6781 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6782 ppc_elf_howto_init ();
6783
6784 htab = ppc_elf_hash_table (info);
6785 local_got_offsets = elf_local_got_offsets (input_bfd);
6786 symtab_hdr = &elf_symtab_hdr (input_bfd);
6787 sym_hashes = elf_sym_hashes (input_bfd);
6788 /* We have to handle relocations in vxworks .tls_vars sections
6789 specially, because the dynamic loader is 'weird'. */
6790 is_vxworks_tls = (htab->is_vxworks && info->shared
6791 && !strcmp (input_section->output_section->name,
6792 ".tls_vars"));
6793 rel = relocs;
6794 relend = relocs + input_section->reloc_count;
6795 for (; rel < relend; rel++)
6796 {
6797 enum elf_ppc_reloc_type r_type;
6798 bfd_vma addend;
6799 bfd_reloc_status_type r;
6800 Elf_Internal_Sym *sym;
6801 asection *sec;
6802 struct elf_link_hash_entry *h;
6803 const char *sym_name;
6804 reloc_howto_type *howto;
6805 unsigned long r_symndx;
6806 bfd_vma relocation;
6807 bfd_vma branch_bit, from;
6808 bfd_boolean unresolved_reloc;
6809 bfd_boolean warned;
6810 unsigned int tls_type, tls_mask, tls_gd;
6811 struct plt_entry **ifunc;
6812
6813 r_type = ELF32_R_TYPE (rel->r_info);
6814 sym = NULL;
6815 sec = NULL;
6816 h = NULL;
6817 unresolved_reloc = FALSE;
6818 warned = FALSE;
6819 r_symndx = ELF32_R_SYM (rel->r_info);
6820
6821 if (r_symndx < symtab_hdr->sh_info)
6822 {
6823 sym = local_syms + r_symndx;
6824 sec = local_sections[r_symndx];
6825 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6826
6827 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6828 }
6829 else
6830 {
6831 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6832 r_symndx, symtab_hdr, sym_hashes,
6833 h, sec, relocation,
6834 unresolved_reloc, warned);
6835
6836 sym_name = h->root.root.string;
6837 }
6838
6839 if (sec != NULL && elf_discarded_section (sec))
6840 {
6841 /* For relocs against symbols from removed linkonce sections,
6842 or sections discarded by a linker script, we just want the
6843 section contents zeroed. Avoid any special processing. */
6844 howto = NULL;
6845 if (r_type < R_PPC_max)
6846 howto = ppc_elf_howto_table[r_type];
6847 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6848 rel->r_info = 0;
6849 rel->r_addend = 0;
6850 continue;
6851 }
6852
6853 if (info->relocatable)
6854 {
6855 if (got2 != NULL
6856 && r_type == R_PPC_PLTREL24
6857 && rel->r_addend >= 32768)
6858 {
6859 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6860 addend specifies the GOT pointer offset within .got2. */
6861 rel->r_addend += got2->output_offset;
6862 }
6863 continue;
6864 }
6865
6866 /* TLS optimizations. Replace instruction sequences and relocs
6867 based on information we collected in tls_optimize. We edit
6868 RELOCS so that --emit-relocs will output something sensible
6869 for the final instruction stream. */
6870 tls_mask = 0;
6871 tls_gd = 0;
6872 if (h != NULL)
6873 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6874 else if (local_got_offsets != NULL)
6875 {
6876 struct plt_entry **local_plt;
6877 char *lgot_masks;
6878 local_plt
6879 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6880 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6881 tls_mask = lgot_masks[r_symndx];
6882 }
6883
6884 /* Ensure reloc mapping code below stays sane. */
6885 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6886 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6887 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6888 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6889 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6890 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6891 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6892 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6893 abort ();
6894 switch (r_type)
6895 {
6896 default:
6897 break;
6898
6899 case R_PPC_GOT_TPREL16:
6900 case R_PPC_GOT_TPREL16_LO:
6901 if ((tls_mask & TLS_TLS) != 0
6902 && (tls_mask & TLS_TPREL) == 0)
6903 {
6904 bfd_vma insn;
6905
6906 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6907 insn &= 31 << 21;
6908 insn |= 0x3c020000; /* addis 0,2,0 */
6909 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6910 r_type = R_PPC_TPREL16_HA;
6911 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6912 }
6913 break;
6914
6915 case R_PPC_TLS:
6916 if ((tls_mask & TLS_TLS) != 0
6917 && (tls_mask & TLS_TPREL) == 0)
6918 {
6919 bfd_vma insn;
6920
6921 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6922 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6923 if (insn == 0)
6924 abort ();
6925 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6926 r_type = R_PPC_TPREL16_LO;
6927 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6928
6929 /* Was PPC_TLS which sits on insn boundary, now
6930 PPC_TPREL16_LO which is at low-order half-word. */
6931 rel->r_offset += d_offset;
6932 }
6933 break;
6934
6935 case R_PPC_GOT_TLSGD16_HI:
6936 case R_PPC_GOT_TLSGD16_HA:
6937 tls_gd = TLS_TPRELGD;
6938 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6939 goto tls_gdld_hi;
6940 break;
6941
6942 case R_PPC_GOT_TLSLD16_HI:
6943 case R_PPC_GOT_TLSLD16_HA:
6944 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6945 {
6946 tls_gdld_hi:
6947 if ((tls_mask & tls_gd) != 0)
6948 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6949 + R_PPC_GOT_TPREL16);
6950 else
6951 {
6952 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6953 rel->r_offset -= d_offset;
6954 r_type = R_PPC_NONE;
6955 }
6956 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6957 }
6958 break;
6959
6960 case R_PPC_GOT_TLSGD16:
6961 case R_PPC_GOT_TLSGD16_LO:
6962 tls_gd = TLS_TPRELGD;
6963 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6964 goto tls_ldgd_opt;
6965 break;
6966
6967 case R_PPC_GOT_TLSLD16:
6968 case R_PPC_GOT_TLSLD16_LO:
6969 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6970 {
6971 unsigned int insn1, insn2;
6972 bfd_vma offset;
6973
6974 tls_ldgd_opt:
6975 offset = (bfd_vma) -1;
6976 /* If not using the newer R_PPC_TLSGD/LD to mark
6977 __tls_get_addr calls, we must trust that the call
6978 stays with its arg setup insns, ie. that the next
6979 reloc is the __tls_get_addr call associated with
6980 the current reloc. Edit both insns. */
6981 if (input_section->has_tls_get_addr_call
6982 && rel + 1 < relend
6983 && branch_reloc_hash_match (input_bfd, rel + 1,
6984 htab->tls_get_addr))
6985 offset = rel[1].r_offset;
6986 if ((tls_mask & tls_gd) != 0)
6987 {
6988 /* IE */
6989 insn1 = bfd_get_32 (output_bfd,
6990 contents + rel->r_offset - d_offset);
6991 insn1 &= (1 << 26) - 1;
6992 insn1 |= 32 << 26; /* lwz */
6993 if (offset != (bfd_vma) -1)
6994 {
6995 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6996 insn2 = 0x7c631214; /* add 3,3,2 */
6997 bfd_put_32 (output_bfd, insn2, contents + offset);
6998 }
6999 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7000 + R_PPC_GOT_TPREL16);
7001 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7002 }
7003 else
7004 {
7005 /* LE */
7006 insn1 = 0x3c620000; /* addis 3,2,0 */
7007 if (tls_gd == 0)
7008 {
7009 /* Was an LD reloc. */
7010 for (r_symndx = 0;
7011 r_symndx < symtab_hdr->sh_info;
7012 r_symndx++)
7013 if (local_sections[r_symndx] == sec)
7014 break;
7015 if (r_symndx >= symtab_hdr->sh_info)
7016 r_symndx = 0;
7017 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7018 if (r_symndx != 0)
7019 rel->r_addend -= (local_syms[r_symndx].st_value
7020 + sec->output_offset
7021 + sec->output_section->vma);
7022 }
7023 r_type = R_PPC_TPREL16_HA;
7024 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7025 if (offset != (bfd_vma) -1)
7026 {
7027 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7028 rel[1].r_offset = offset + d_offset;
7029 rel[1].r_addend = rel->r_addend;
7030 insn2 = 0x38630000; /* addi 3,3,0 */
7031 bfd_put_32 (output_bfd, insn2, contents + offset);
7032 }
7033 }
7034 bfd_put_32 (output_bfd, insn1,
7035 contents + rel->r_offset - d_offset);
7036 if (tls_gd == 0)
7037 {
7038 /* We changed the symbol on an LD reloc. Start over
7039 in order to get h, sym, sec etc. right. */
7040 rel--;
7041 continue;
7042 }
7043 }
7044 break;
7045
7046 case R_PPC_TLSGD:
7047 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7048 {
7049 unsigned int insn2;
7050 bfd_vma offset = rel->r_offset;
7051
7052 if ((tls_mask & TLS_TPRELGD) != 0)
7053 {
7054 /* IE */
7055 r_type = R_PPC_NONE;
7056 insn2 = 0x7c631214; /* add 3,3,2 */
7057 }
7058 else
7059 {
7060 /* LE */
7061 r_type = R_PPC_TPREL16_LO;
7062 rel->r_offset += d_offset;
7063 insn2 = 0x38630000; /* addi 3,3,0 */
7064 }
7065 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7066 bfd_put_32 (output_bfd, insn2, contents + offset);
7067 /* Zap the reloc on the _tls_get_addr call too. */
7068 BFD_ASSERT (offset == rel[1].r_offset);
7069 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7070 }
7071 break;
7072
7073 case R_PPC_TLSLD:
7074 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7075 {
7076 unsigned int insn2;
7077
7078 for (r_symndx = 0;
7079 r_symndx < symtab_hdr->sh_info;
7080 r_symndx++)
7081 if (local_sections[r_symndx] == sec)
7082 break;
7083 if (r_symndx >= symtab_hdr->sh_info)
7084 r_symndx = 0;
7085 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7086 if (r_symndx != 0)
7087 rel->r_addend -= (local_syms[r_symndx].st_value
7088 + sec->output_offset
7089 + sec->output_section->vma);
7090
7091 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7092 rel->r_offset += d_offset;
7093 insn2 = 0x38630000; /* addi 3,3,0 */
7094 bfd_put_32 (output_bfd, insn2,
7095 contents + rel->r_offset - d_offset);
7096 /* Zap the reloc on the _tls_get_addr call too. */
7097 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7098 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7099 rel--;
7100 continue;
7101 }
7102 break;
7103 }
7104
7105 /* Handle other relocations that tweak non-addend part of insn. */
7106 branch_bit = 0;
7107 switch (r_type)
7108 {
7109 default:
7110 break;
7111
7112 /* Branch taken prediction relocations. */
7113 case R_PPC_ADDR14_BRTAKEN:
7114 case R_PPC_REL14_BRTAKEN:
7115 branch_bit = BRANCH_PREDICT_BIT;
7116 /* Fall thru */
7117
7118 /* Branch not taken prediction relocations. */
7119 case R_PPC_ADDR14_BRNTAKEN:
7120 case R_PPC_REL14_BRNTAKEN:
7121 {
7122 bfd_vma insn;
7123
7124 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7125 insn &= ~BRANCH_PREDICT_BIT;
7126 insn |= branch_bit;
7127
7128 from = (rel->r_offset
7129 + input_section->output_offset
7130 + input_section->output_section->vma);
7131
7132 /* Invert 'y' bit if not the default. */
7133 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7134 insn ^= BRANCH_PREDICT_BIT;
7135
7136 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7137 break;
7138 }
7139 }
7140
7141 ifunc = NULL;
7142 if (!htab->is_vxworks)
7143 {
7144 struct plt_entry *ent;
7145
7146 if (h != NULL)
7147 {
7148 if (h->type == STT_GNU_IFUNC)
7149 ifunc = &h->plt.plist;
7150 }
7151 else if (local_got_offsets != NULL
7152 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7153 {
7154 struct plt_entry **local_plt;
7155
7156 local_plt = (struct plt_entry **) (local_got_offsets
7157 + symtab_hdr->sh_info);
7158 ifunc = local_plt + r_symndx;
7159 }
7160
7161 ent = NULL;
7162 if (ifunc != NULL
7163 && (!info->shared
7164 || is_branch_reloc (r_type)))
7165 {
7166 addend = 0;
7167 if (r_type == R_PPC_PLTREL24 && info->shared)
7168 addend = rel->r_addend;
7169 ent = find_plt_ent (ifunc, got2, addend);
7170 }
7171 if (ent != NULL)
7172 {
7173 if (h == NULL && (ent->plt.offset & 1) == 0)
7174 {
7175 Elf_Internal_Rela rela;
7176 bfd_byte *loc;
7177
7178 rela.r_offset = (htab->iplt->output_section->vma
7179 + htab->iplt->output_offset
7180 + ent->plt.offset);
7181 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7182 rela.r_addend = relocation;
7183 loc = htab->reliplt->contents;
7184 loc += (htab->reliplt->reloc_count++
7185 * sizeof (Elf32_External_Rela));
7186 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7187
7188 ent->plt.offset |= 1;
7189 }
7190 if (h == NULL && (ent->glink_offset & 1) == 0)
7191 {
7192 unsigned char *p = ((unsigned char *) htab->glink->contents
7193 + ent->glink_offset);
7194 write_glink_stub (ent, htab->iplt, p, info);
7195 ent->glink_offset |= 1;
7196 }
7197
7198 unresolved_reloc = FALSE;
7199 if (htab->plt_type == PLT_NEW
7200 || !htab->elf.dynamic_sections_created
7201 || h == NULL)
7202 relocation = (htab->glink->output_section->vma
7203 + htab->glink->output_offset
7204 + (ent->glink_offset & ~1));
7205 else
7206 relocation = (htab->plt->output_section->vma
7207 + htab->plt->output_offset
7208 + ent->plt.offset);
7209 }
7210 }
7211
7212 addend = rel->r_addend;
7213 tls_type = 0;
7214 howto = NULL;
7215 if (r_type < R_PPC_max)
7216 howto = ppc_elf_howto_table[r_type];
7217 switch (r_type)
7218 {
7219 default:
7220 (*_bfd_error_handler)
7221 (_("%B: unknown relocation type %d for symbol %s"),
7222 input_bfd, (int) r_type, sym_name);
7223
7224 bfd_set_error (bfd_error_bad_value);
7225 ret = FALSE;
7226 continue;
7227
7228 case R_PPC_NONE:
7229 case R_PPC_TLS:
7230 case R_PPC_TLSGD:
7231 case R_PPC_TLSLD:
7232 case R_PPC_EMB_MRKREF:
7233 case R_PPC_GNU_VTINHERIT:
7234 case R_PPC_GNU_VTENTRY:
7235 continue;
7236
7237 /* GOT16 relocations. Like an ADDR16 using the symbol's
7238 address in the GOT as relocation value instead of the
7239 symbol's value itself. Also, create a GOT entry for the
7240 symbol and put the symbol value there. */
7241 case R_PPC_GOT_TLSGD16:
7242 case R_PPC_GOT_TLSGD16_LO:
7243 case R_PPC_GOT_TLSGD16_HI:
7244 case R_PPC_GOT_TLSGD16_HA:
7245 tls_type = TLS_TLS | TLS_GD;
7246 goto dogot;
7247
7248 case R_PPC_GOT_TLSLD16:
7249 case R_PPC_GOT_TLSLD16_LO:
7250 case R_PPC_GOT_TLSLD16_HI:
7251 case R_PPC_GOT_TLSLD16_HA:
7252 tls_type = TLS_TLS | TLS_LD;
7253 goto dogot;
7254
7255 case R_PPC_GOT_TPREL16:
7256 case R_PPC_GOT_TPREL16_LO:
7257 case R_PPC_GOT_TPREL16_HI:
7258 case R_PPC_GOT_TPREL16_HA:
7259 tls_type = TLS_TLS | TLS_TPREL;
7260 goto dogot;
7261
7262 case R_PPC_GOT_DTPREL16:
7263 case R_PPC_GOT_DTPREL16_LO:
7264 case R_PPC_GOT_DTPREL16_HI:
7265 case R_PPC_GOT_DTPREL16_HA:
7266 tls_type = TLS_TLS | TLS_DTPREL;
7267 goto dogot;
7268
7269 case R_PPC_GOT16:
7270 case R_PPC_GOT16_LO:
7271 case R_PPC_GOT16_HI:
7272 case R_PPC_GOT16_HA:
7273 tls_mask = 0;
7274 dogot:
7275 {
7276 /* Relocation is to the entry for this symbol in the global
7277 offset table. */
7278 bfd_vma off;
7279 bfd_vma *offp;
7280 unsigned long indx;
7281
7282 if (htab->got == NULL)
7283 abort ();
7284
7285 indx = 0;
7286 if (tls_type == (TLS_TLS | TLS_LD)
7287 && (h == NULL
7288 || !h->def_dynamic))
7289 offp = &htab->tlsld_got.offset;
7290 else if (h != NULL)
7291 {
7292 bfd_boolean dyn;
7293 dyn = htab->elf.dynamic_sections_created;
7294 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7295 || (info->shared
7296 && SYMBOL_REFERENCES_LOCAL (info, h)))
7297 /* This is actually a static link, or it is a
7298 -Bsymbolic link and the symbol is defined
7299 locally, or the symbol was forced to be local
7300 because of a version file. */
7301 ;
7302 else
7303 {
7304 indx = h->dynindx;
7305 unresolved_reloc = FALSE;
7306 }
7307 offp = &h->got.offset;
7308 }
7309 else
7310 {
7311 if (local_got_offsets == NULL)
7312 abort ();
7313 offp = &local_got_offsets[r_symndx];
7314 }
7315
7316 /* The offset must always be a multiple of 4. We use the
7317 least significant bit to record whether we have already
7318 processed this entry. */
7319 off = *offp;
7320 if ((off & 1) != 0)
7321 off &= ~1;
7322 else
7323 {
7324 unsigned int tls_m = (tls_mask
7325 & (TLS_LD | TLS_GD | TLS_DTPREL
7326 | TLS_TPREL | TLS_TPRELGD));
7327
7328 if (offp == &htab->tlsld_got.offset)
7329 tls_m = TLS_LD;
7330 else if (h == NULL
7331 || !h->def_dynamic)
7332 tls_m &= ~TLS_LD;
7333
7334 /* We might have multiple got entries for this sym.
7335 Initialize them all. */
7336 do
7337 {
7338 int tls_ty = 0;
7339
7340 if ((tls_m & TLS_LD) != 0)
7341 {
7342 tls_ty = TLS_TLS | TLS_LD;
7343 tls_m &= ~TLS_LD;
7344 }
7345 else if ((tls_m & TLS_GD) != 0)
7346 {
7347 tls_ty = TLS_TLS | TLS_GD;
7348 tls_m &= ~TLS_GD;
7349 }
7350 else if ((tls_m & TLS_DTPREL) != 0)
7351 {
7352 tls_ty = TLS_TLS | TLS_DTPREL;
7353 tls_m &= ~TLS_DTPREL;
7354 }
7355 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7356 {
7357 tls_ty = TLS_TLS | TLS_TPREL;
7358 tls_m = 0;
7359 }
7360
7361 /* Generate relocs for the dynamic linker. */
7362 if ((info->shared || indx != 0)
7363 && (offp == &htab->tlsld_got.offset
7364 || h == NULL
7365 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7366 || h->root.type != bfd_link_hash_undefweak))
7367 {
7368 asection *rsec = htab->relgot;
7369 bfd_byte * loc;
7370
7371 outrel.r_offset = (htab->got->output_section->vma
7372 + htab->got->output_offset
7373 + off);
7374 outrel.r_addend = 0;
7375 if (tls_ty & (TLS_LD | TLS_GD))
7376 {
7377 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7378 if (tls_ty == (TLS_TLS | TLS_GD))
7379 {
7380 loc = rsec->contents;
7381 loc += (rsec->reloc_count++
7382 * sizeof (Elf32_External_Rela));
7383 bfd_elf32_swap_reloca_out (output_bfd,
7384 &outrel, loc);
7385 outrel.r_offset += 4;
7386 outrel.r_info
7387 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7388 }
7389 }
7390 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7391 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7392 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7393 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7394 else if (indx != 0)
7395 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7396 else if (ifunc != NULL)
7397 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7398 else
7399 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7400 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7401 {
7402 outrel.r_addend += relocation;
7403 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7404 outrel.r_addend -= htab->elf.tls_sec->vma;
7405 }
7406 loc = rsec->contents;
7407 loc += (rsec->reloc_count++
7408 * sizeof (Elf32_External_Rela));
7409 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7410 }
7411
7412 /* Init the .got section contents if we're not
7413 emitting a reloc. */
7414 else
7415 {
7416 bfd_vma value = relocation;
7417
7418 if (tls_ty == (TLS_TLS | TLS_LD))
7419 value = 1;
7420 else if (tls_ty != 0)
7421 {
7422 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7423 if (tls_ty == (TLS_TLS | TLS_TPREL))
7424 value += DTP_OFFSET - TP_OFFSET;
7425
7426 if (tls_ty == (TLS_TLS | TLS_GD))
7427 {
7428 bfd_put_32 (output_bfd, value,
7429 htab->got->contents + off + 4);
7430 value = 1;
7431 }
7432 }
7433 bfd_put_32 (output_bfd, value,
7434 htab->got->contents + off);
7435 }
7436
7437 off += 4;
7438 if (tls_ty & (TLS_LD | TLS_GD))
7439 off += 4;
7440 }
7441 while (tls_m != 0);
7442
7443 off = *offp;
7444 *offp = off | 1;
7445 }
7446
7447 if (off >= (bfd_vma) -2)
7448 abort ();
7449
7450 if ((tls_type & TLS_TLS) != 0)
7451 {
7452 if (tls_type != (TLS_TLS | TLS_LD))
7453 {
7454 if ((tls_mask & TLS_LD) != 0
7455 && !(h == NULL
7456 || !h->def_dynamic))
7457 off += 8;
7458 if (tls_type != (TLS_TLS | TLS_GD))
7459 {
7460 if ((tls_mask & TLS_GD) != 0)
7461 off += 8;
7462 if (tls_type != (TLS_TLS | TLS_DTPREL))
7463 {
7464 if ((tls_mask & TLS_DTPREL) != 0)
7465 off += 4;
7466 }
7467 }
7468 }
7469 }
7470
7471 relocation = (htab->got->output_section->vma
7472 + htab->got->output_offset
7473 + off
7474 - SYM_VAL (htab->elf.hgot));
7475
7476 /* Addends on got relocations don't make much sense.
7477 x+off@got is actually x@got+off, and since the got is
7478 generated by a hash table traversal, the value in the
7479 got at entry m+n bears little relation to the entry m. */
7480 if (addend != 0)
7481 (*_bfd_error_handler)
7482 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7483 input_bfd,
7484 input_section,
7485 (long) rel->r_offset,
7486 howto->name,
7487 sym_name);
7488 }
7489 break;
7490
7491 /* Relocations that need no special processing. */
7492 case R_PPC_LOCAL24PC:
7493 /* It makes no sense to point a local relocation
7494 at a symbol not in this object. */
7495 if (unresolved_reloc)
7496 {
7497 if (! (*info->callbacks->undefined_symbol) (info,
7498 h->root.root.string,
7499 input_bfd,
7500 input_section,
7501 rel->r_offset,
7502 TRUE))
7503 return FALSE;
7504 continue;
7505 }
7506 break;
7507
7508 case R_PPC_DTPREL16:
7509 case R_PPC_DTPREL16_LO:
7510 case R_PPC_DTPREL16_HI:
7511 case R_PPC_DTPREL16_HA:
7512 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7513 break;
7514
7515 /* Relocations that may need to be propagated if this is a shared
7516 object. */
7517 case R_PPC_TPREL16:
7518 case R_PPC_TPREL16_LO:
7519 case R_PPC_TPREL16_HI:
7520 case R_PPC_TPREL16_HA:
7521 if (h != NULL
7522 && h->root.type == bfd_link_hash_undefweak
7523 && h->dynindx == -1)
7524 {
7525 /* Make this relocation against an undefined weak symbol
7526 resolve to zero. This is really just a tweak, since
7527 code using weak externs ought to check that they are
7528 defined before using them. */
7529 bfd_byte *p = contents + rel->r_offset - d_offset;
7530 unsigned int insn = bfd_get_32 (output_bfd, p);
7531 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7532 if (insn != 0)
7533 bfd_put_32 (output_bfd, insn, p);
7534 break;
7535 }
7536 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7537 /* The TPREL16 relocs shouldn't really be used in shared
7538 libs as they will result in DT_TEXTREL being set, but
7539 support them anyway. */
7540 goto dodyn;
7541
7542 case R_PPC_TPREL32:
7543 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7544 goto dodyn;
7545
7546 case R_PPC_DTPREL32:
7547 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7548 goto dodyn;
7549
7550 case R_PPC_DTPMOD32:
7551 relocation = 1;
7552 addend = 0;
7553 goto dodyn;
7554
7555 case R_PPC_REL16:
7556 case R_PPC_REL16_LO:
7557 case R_PPC_REL16_HI:
7558 case R_PPC_REL16_HA:
7559 break;
7560
7561 case R_PPC_REL32:
7562 if (h == NULL || h == htab->elf.hgot)
7563 break;
7564 /* fall through */
7565
7566 case R_PPC_ADDR32:
7567 case R_PPC_ADDR16:
7568 case R_PPC_ADDR16_LO:
7569 case R_PPC_ADDR16_HI:
7570 case R_PPC_ADDR16_HA:
7571 case R_PPC_UADDR32:
7572 case R_PPC_UADDR16:
7573 goto dodyn;
7574
7575 case R_PPC_REL24:
7576 case R_PPC_REL14:
7577 case R_PPC_REL14_BRTAKEN:
7578 case R_PPC_REL14_BRNTAKEN:
7579 /* If these relocations are not to a named symbol, they can be
7580 handled right here, no need to bother the dynamic linker. */
7581 if (SYMBOL_CALLS_LOCAL (info, h)
7582 || h == htab->elf.hgot)
7583 break;
7584 /* fall through */
7585
7586 case R_PPC_ADDR24:
7587 case R_PPC_ADDR14:
7588 case R_PPC_ADDR14_BRTAKEN:
7589 case R_PPC_ADDR14_BRNTAKEN:
7590 if (h != NULL && !info->shared)
7591 break;
7592 /* fall through */
7593
7594 dodyn:
7595 if ((input_section->flags & SEC_ALLOC) == 0
7596 || is_vxworks_tls)
7597 break;
7598
7599 if ((info->shared
7600 && !(h != NULL
7601 && ((h->root.type == bfd_link_hash_undefined
7602 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7603 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7604 || (h->root.type == bfd_link_hash_undefweak
7605 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7606 && (must_be_dyn_reloc (info, r_type)
7607 || !SYMBOL_CALLS_LOCAL (info, h)))
7608 || (ELIMINATE_COPY_RELOCS
7609 && !info->shared
7610 && h != NULL
7611 && h->dynindx != -1
7612 && !h->non_got_ref
7613 && !h->def_regular))
7614 {
7615 int skip;
7616 bfd_byte * loc;
7617 #ifdef DEBUG
7618 fprintf (stderr, "ppc_elf_relocate_section needs to "
7619 "create relocation for %s\n",
7620 (h && h->root.root.string
7621 ? h->root.root.string : "<unknown>"));
7622 #endif
7623
7624 /* When generating a shared object, these relocations
7625 are copied into the output file to be resolved at run
7626 time. */
7627 if (sreloc == NULL)
7628 {
7629 sreloc = elf_section_data (input_section)->sreloc;
7630 if (!htab->elf.dynamic_sections_created)
7631 sreloc = htab->reliplt;
7632 if (sreloc == NULL)
7633 return FALSE;
7634 }
7635
7636 skip = 0;
7637 outrel.r_offset =
7638 _bfd_elf_section_offset (output_bfd, info, input_section,
7639 rel->r_offset);
7640 if (outrel.r_offset == (bfd_vma) -1
7641 || outrel.r_offset == (bfd_vma) -2)
7642 skip = (int) outrel.r_offset;
7643 outrel.r_offset += (input_section->output_section->vma
7644 + input_section->output_offset);
7645
7646 if (skip)
7647 memset (&outrel, 0, sizeof outrel);
7648 else if ((h != NULL
7649 && (h->root.type == bfd_link_hash_undefined
7650 || h->root.type == bfd_link_hash_undefweak))
7651 || !SYMBOL_REFERENCES_LOCAL (info, h))
7652 {
7653 unresolved_reloc = FALSE;
7654 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7655 outrel.r_addend = rel->r_addend;
7656 }
7657 else
7658 {
7659 outrel.r_addend = relocation + rel->r_addend;
7660
7661 if (r_type != R_PPC_ADDR32)
7662 {
7663 long indx = 0;
7664
7665 if (ifunc != NULL)
7666 {
7667 /* If we get here when building a static
7668 executable, then the libc startup function
7669 responsible for applying indirect function
7670 relocations is going to complain about
7671 the reloc type.
7672 If we get here when building a dynamic
7673 executable, it will be because we have
7674 a text relocation. The dynamic loader
7675 will set the text segment writable and
7676 non-executable to apply text relocations.
7677 So we'll segfault when trying to run the
7678 indirection function to resolve the reloc. */
7679 (*_bfd_error_handler)
7680 (_("%B(%A+0x%lx): relocation %s for indirect "
7681 "function %s unsupported"),
7682 input_bfd,
7683 input_section,
7684 (long) rel->r_offset,
7685 howto->name,
7686 sym_name);
7687 ret = FALSE;
7688 }
7689 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7690 ;
7691 else if (sec == NULL || sec->owner == NULL)
7692 {
7693 bfd_set_error (bfd_error_bad_value);
7694 ret = FALSE;
7695 }
7696 else
7697 {
7698 asection *osec;
7699
7700 /* We are turning this relocation into one
7701 against a section symbol. It would be
7702 proper to subtract the symbol's value,
7703 osec->vma, from the emitted reloc addend,
7704 but ld.so expects buggy relocs.
7705 FIXME: Why not always use a zero index? */
7706 osec = sec->output_section;
7707 indx = elf_section_data (osec)->dynindx;
7708 if (indx == 0)
7709 {
7710 osec = htab->elf.text_index_section;
7711 indx = elf_section_data (osec)->dynindx;
7712 }
7713 BFD_ASSERT (indx != 0);
7714 #ifdef DEBUG
7715 if (indx == 0)
7716 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7717 indx, osec->name, osec->flags,
7718 h->root.root.string);
7719 #endif
7720 }
7721
7722 outrel.r_info = ELF32_R_INFO (indx, r_type);
7723 }
7724 else if (ifunc != NULL)
7725 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7726 else
7727 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7728 }
7729
7730 loc = sreloc->contents;
7731 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7732 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7733
7734 if (skip == -1)
7735 continue;
7736
7737 /* This reloc will be computed at runtime. We clear the memory
7738 so that it contains predictable value. */
7739 if (! skip
7740 && ((input_section->flags & SEC_ALLOC) != 0
7741 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7742 {
7743 relocation = howto->pc_relative ? outrel.r_offset : 0;
7744 addend = 0;
7745 break;
7746 }
7747 }
7748 break;
7749
7750 case R_PPC_RELAX_PLT:
7751 case R_PPC_RELAX_PLTREL24:
7752 if (h != NULL)
7753 {
7754 struct plt_entry *ent;
7755 bfd_vma got2_addend = 0;
7756
7757 if (r_type == R_PPC_RELAX_PLTREL24)
7758 {
7759 if (info->shared)
7760 got2_addend = addend;
7761 addend = 0;
7762 }
7763 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7764 if (htab->plt_type == PLT_NEW)
7765 relocation = (htab->glink->output_section->vma
7766 + htab->glink->output_offset
7767 + ent->glink_offset);
7768 else
7769 relocation = (htab->plt->output_section->vma
7770 + htab->plt->output_offset
7771 + ent->plt.offset);
7772 }
7773 /* Fall thru */
7774
7775 case R_PPC_RELAX:
7776 if (info->shared)
7777 relocation -= (input_section->output_section->vma
7778 + input_section->output_offset
7779 + rel->r_offset - 4);
7780
7781 {
7782 unsigned long t0;
7783 unsigned long t1;
7784
7785 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7786 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7787
7788 /* We're clearing the bits for R_PPC_ADDR16_HA
7789 and R_PPC_ADDR16_LO here. */
7790 t0 &= ~0xffff;
7791 t1 &= ~0xffff;
7792
7793 /* t0 is HA, t1 is LO */
7794 relocation += addend;
7795 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7796 t1 |= relocation & 0xffff;
7797
7798 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7799 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7800
7801 /* Rewrite the reloc and convert one of the trailing nop
7802 relocs to describe this relocation. */
7803 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7804 /* The relocs are at the bottom 2 bytes */
7805 rel[0].r_offset += 2;
7806 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7807 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7808 rel[1].r_offset += 4;
7809 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7810 rel++;
7811 }
7812 continue;
7813
7814 /* Indirect .sdata relocation. */
7815 case R_PPC_EMB_SDAI16:
7816 BFD_ASSERT (htab->sdata[0].section != NULL);
7817 if (!is_static_defined (htab->sdata[0].sym))
7818 {
7819 unresolved_reloc = TRUE;
7820 break;
7821 }
7822 relocation
7823 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7824 h, relocation, rel);
7825 addend = 0;
7826 break;
7827
7828 /* Indirect .sdata2 relocation. */
7829 case R_PPC_EMB_SDA2I16:
7830 BFD_ASSERT (htab->sdata[1].section != NULL);
7831 if (!is_static_defined (htab->sdata[1].sym))
7832 {
7833 unresolved_reloc = TRUE;
7834 break;
7835 }
7836 relocation
7837 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7838 h, relocation, rel);
7839 addend = 0;
7840 break;
7841
7842 /* Handle the TOC16 reloc. We want to use the offset within the .got
7843 section, not the actual VMA. This is appropriate when generating
7844 an embedded ELF object, for which the .got section acts like the
7845 AIX .toc section. */
7846 case R_PPC_TOC16: /* phony GOT16 relocations */
7847 if (sec == NULL || sec->output_section == NULL)
7848 {
7849 unresolved_reloc = TRUE;
7850 break;
7851 }
7852 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7853 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7854
7855 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7856 break;
7857
7858 case R_PPC_PLTREL24:
7859 if (h == NULL || ifunc != NULL)
7860 break;
7861 /* Relocation is to the entry for this symbol in the
7862 procedure linkage table. */
7863 {
7864 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7865 info->shared ? addend : 0);
7866 addend = 0;
7867 if (ent == NULL
7868 || htab->plt == NULL)
7869 {
7870 /* We didn't make a PLT entry for this symbol. This
7871 happens when statically linking PIC code, or when
7872 using -Bsymbolic. */
7873 break;
7874 }
7875
7876 unresolved_reloc = FALSE;
7877 if (htab->plt_type == PLT_NEW)
7878 relocation = (htab->glink->output_section->vma
7879 + htab->glink->output_offset
7880 + ent->glink_offset);
7881 else
7882 relocation = (htab->plt->output_section->vma
7883 + htab->plt->output_offset
7884 + ent->plt.offset);
7885 }
7886 break;
7887
7888 /* Relocate against _SDA_BASE_. */
7889 case R_PPC_SDAREL16:
7890 {
7891 const char *name;
7892 struct elf_link_hash_entry *sda = htab->sdata[0].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, ".sdata")
7905 && (name[6] == 0 || name[6] == '.'))
7906 || (CONST_STRNEQ (name, ".sbss")
7907 && (name[5] == 0 || name[5] == '.'))))
7908 {
7909 (*_bfd_error_handler)
7910 (_("%B: the target (%s) of a %s relocation is "
7911 "in the wrong output section (%s)"),
7912 input_bfd,
7913 sym_name,
7914 howto->name,
7915 name);
7916 }
7917 }
7918 break;
7919
7920 /* Relocate against _SDA2_BASE_. */
7921 case R_PPC_EMB_SDA2REL:
7922 {
7923 const char *name;
7924 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7925
7926 if (sec == NULL
7927 || sec->output_section == NULL
7928 || !is_static_defined (sda))
7929 {
7930 unresolved_reloc = TRUE;
7931 break;
7932 }
7933 addend -= SYM_VAL (sda);
7934
7935 name = bfd_get_section_name (abfd, sec->output_section);
7936 if (! (CONST_STRNEQ (name, ".sdata2")
7937 || CONST_STRNEQ (name, ".sbss2")))
7938 {
7939 (*_bfd_error_handler)
7940 (_("%B: the target (%s) of a %s relocation is "
7941 "in the wrong output section (%s)"),
7942 input_bfd,
7943 sym_name,
7944 howto->name,
7945 name);
7946 }
7947 }
7948 break;
7949
7950 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7951 case R_PPC_EMB_SDA21:
7952 case R_PPC_EMB_RELSDA:
7953 {
7954 const char *name;
7955 int reg;
7956 struct elf_link_hash_entry *sda = NULL;
7957
7958 if (sec == NULL || sec->output_section == NULL)
7959 {
7960 unresolved_reloc = TRUE;
7961 break;
7962 }
7963
7964 name = bfd_get_section_name (abfd, sec->output_section);
7965 if (((CONST_STRNEQ (name, ".sdata")
7966 && (name[6] == 0 || name[6] == '.'))
7967 || (CONST_STRNEQ (name, ".sbss")
7968 && (name[5] == 0 || name[5] == '.'))))
7969 {
7970 reg = 13;
7971 sda = htab->sdata[0].sym;
7972 }
7973 else if (CONST_STRNEQ (name, ".sdata2")
7974 || CONST_STRNEQ (name, ".sbss2"))
7975 {
7976 reg = 2;
7977 sda = htab->sdata[1].sym;
7978 }
7979 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7980 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7981 {
7982 reg = 0;
7983 }
7984 else
7985 {
7986 (*_bfd_error_handler)
7987 (_("%B: the target (%s) of a %s relocation is "
7988 "in the wrong output section (%s)"),
7989 input_bfd,
7990 sym_name,
7991 howto->name,
7992 name);
7993
7994 bfd_set_error (bfd_error_bad_value);
7995 ret = FALSE;
7996 continue;
7997 }
7998
7999 if (sda != NULL)
8000 {
8001 if (!is_static_defined (sda))
8002 {
8003 unresolved_reloc = TRUE;
8004 break;
8005 }
8006 addend -= SYM_VAL (sda);
8007 }
8008
8009 if (r_type == R_PPC_EMB_SDA21)
8010 {
8011 bfd_vma insn; /* Fill in register field. */
8012
8013 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8014 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8015 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8016 }
8017 }
8018 break;
8019
8020 /* Relocate against the beginning of the section. */
8021 case R_PPC_SECTOFF:
8022 case R_PPC_SECTOFF_LO:
8023 case R_PPC_SECTOFF_HI:
8024 case R_PPC_SECTOFF_HA:
8025 if (sec == NULL || sec->output_section == NULL)
8026 {
8027 unresolved_reloc = TRUE;
8028 break;
8029 }
8030 addend -= sec->output_section->vma;
8031 break;
8032
8033 /* Negative relocations. */
8034 case R_PPC_EMB_NADDR32:
8035 case R_PPC_EMB_NADDR16:
8036 case R_PPC_EMB_NADDR16_LO:
8037 case R_PPC_EMB_NADDR16_HI:
8038 case R_PPC_EMB_NADDR16_HA:
8039 addend -= 2 * relocation;
8040 break;
8041
8042 case R_PPC_COPY:
8043 case R_PPC_GLOB_DAT:
8044 case R_PPC_JMP_SLOT:
8045 case R_PPC_RELATIVE:
8046 case R_PPC_IRELATIVE:
8047 case R_PPC_PLT32:
8048 case R_PPC_PLTREL32:
8049 case R_PPC_PLT16_LO:
8050 case R_PPC_PLT16_HI:
8051 case R_PPC_PLT16_HA:
8052 case R_PPC_ADDR30:
8053 case R_PPC_EMB_RELSEC16:
8054 case R_PPC_EMB_RELST_LO:
8055 case R_PPC_EMB_RELST_HI:
8056 case R_PPC_EMB_RELST_HA:
8057 case R_PPC_EMB_BIT_FLD:
8058 (*_bfd_error_handler)
8059 (_("%B: relocation %s is not yet supported for symbol %s."),
8060 input_bfd,
8061 howto->name,
8062 sym_name);
8063
8064 bfd_set_error (bfd_error_invalid_operation);
8065 ret = FALSE;
8066 continue;
8067 }
8068
8069 /* Do any further special processing. */
8070 switch (r_type)
8071 {
8072 default:
8073 break;
8074
8075 case R_PPC_ADDR16_HA:
8076 case R_PPC_REL16_HA:
8077 case R_PPC_SECTOFF_HA:
8078 case R_PPC_TPREL16_HA:
8079 case R_PPC_DTPREL16_HA:
8080 case R_PPC_EMB_NADDR16_HA:
8081 case R_PPC_EMB_RELST_HA:
8082 /* It's just possible that this symbol is a weak symbol
8083 that's not actually defined anywhere. In that case,
8084 'sec' would be NULL, and we should leave the symbol
8085 alone (it will be set to zero elsewhere in the link). */
8086 if (sec == NULL)
8087 break;
8088 /* Fall thru */
8089
8090 case R_PPC_PLT16_HA:
8091 case R_PPC_GOT16_HA:
8092 case R_PPC_GOT_TLSGD16_HA:
8093 case R_PPC_GOT_TLSLD16_HA:
8094 case R_PPC_GOT_TPREL16_HA:
8095 case R_PPC_GOT_DTPREL16_HA:
8096 /* Add 0x10000 if sign bit in 0:15 is set.
8097 Bits 0:15 are not used. */
8098 addend += 0x8000;
8099 break;
8100 }
8101
8102 #ifdef DEBUG
8103 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8104 "offset = %ld, addend = %ld\n",
8105 howto->name,
8106 (int) r_type,
8107 sym_name,
8108 r_symndx,
8109 (long) rel->r_offset,
8110 (long) addend);
8111 #endif
8112
8113 if (unresolved_reloc
8114 && !((input_section->flags & SEC_DEBUGGING) != 0
8115 && h->def_dynamic))
8116 {
8117 (*_bfd_error_handler)
8118 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8119 input_bfd,
8120 input_section,
8121 (long) rel->r_offset,
8122 howto->name,
8123 sym_name);
8124 ret = FALSE;
8125 }
8126
8127 r = _bfd_final_link_relocate (howto,
8128 input_bfd,
8129 input_section,
8130 contents,
8131 rel->r_offset,
8132 relocation,
8133 addend);
8134
8135 if (r != bfd_reloc_ok)
8136 {
8137 if (r == bfd_reloc_overflow)
8138 {
8139 if (warned)
8140 continue;
8141 if (h != NULL
8142 && h->root.type == bfd_link_hash_undefweak
8143 && howto->pc_relative)
8144 {
8145 /* Assume this is a call protected by other code that
8146 detect the symbol is undefined. If this is the case,
8147 we can safely ignore the overflow. If not, the
8148 program is hosed anyway, and a little warning isn't
8149 going to help. */
8150
8151 continue;
8152 }
8153
8154 if (! (*info->callbacks->reloc_overflow) (info,
8155 (h ? &h->root : NULL),
8156 sym_name,
8157 howto->name,
8158 rel->r_addend,
8159 input_bfd,
8160 input_section,
8161 rel->r_offset))
8162 return FALSE;
8163 }
8164 else
8165 {
8166 (*_bfd_error_handler)
8167 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8168 input_bfd, input_section,
8169 (long) rel->r_offset, howto->name, sym_name, (int) r);
8170 ret = FALSE;
8171 }
8172 }
8173 }
8174
8175 #ifdef DEBUG
8176 fprintf (stderr, "\n");
8177 #endif
8178
8179 return ret;
8180 }
8181 \f
8182 /* Finish up dynamic symbol handling. We set the contents of various
8183 dynamic sections here. */
8184
8185 static bfd_boolean
8186 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8187 struct bfd_link_info *info,
8188 struct elf_link_hash_entry *h,
8189 Elf_Internal_Sym *sym)
8190 {
8191 struct ppc_elf_link_hash_table *htab;
8192 struct plt_entry *ent;
8193 bfd_boolean doneone;
8194
8195 #ifdef DEBUG
8196 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8197 h->root.root.string);
8198 #endif
8199
8200 htab = ppc_elf_hash_table (info);
8201 BFD_ASSERT (htab->elf.dynobj != NULL);
8202
8203 doneone = FALSE;
8204 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8205 if (ent->plt.offset != (bfd_vma) -1)
8206 {
8207 if (!doneone)
8208 {
8209 Elf_Internal_Rela rela;
8210 bfd_byte *loc;
8211 bfd_vma reloc_index;
8212
8213 if (htab->plt_type == PLT_NEW
8214 || !htab->elf.dynamic_sections_created
8215 || h->dynindx == -1)
8216 reloc_index = ent->plt.offset / 4;
8217 else
8218 {
8219 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8220 / htab->plt_slot_size);
8221 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8222 && htab->plt_type == PLT_OLD)
8223 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8224 }
8225
8226 /* This symbol has an entry in the procedure linkage table.
8227 Set it up. */
8228 if (htab->plt_type == PLT_VXWORKS
8229 && htab->elf.dynamic_sections_created
8230 && h->dynindx != -1)
8231 {
8232 bfd_vma got_offset;
8233 const bfd_vma *plt_entry;
8234
8235 /* The first three entries in .got.plt are reserved. */
8236 got_offset = (reloc_index + 3) * 4;
8237
8238 /* Use the right PLT. */
8239 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8240 : ppc_elf_vxworks_plt_entry;
8241
8242 /* Fill in the .plt on VxWorks. */
8243 if (info->shared)
8244 {
8245 bfd_put_32 (output_bfd,
8246 plt_entry[0] | PPC_HA (got_offset),
8247 htab->plt->contents + ent->plt.offset + 0);
8248 bfd_put_32 (output_bfd,
8249 plt_entry[1] | PPC_LO (got_offset),
8250 htab->plt->contents + ent->plt.offset + 4);
8251 }
8252 else
8253 {
8254 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8255
8256 bfd_put_32 (output_bfd,
8257 plt_entry[0] | PPC_HA (got_loc),
8258 htab->plt->contents + ent->plt.offset + 0);
8259 bfd_put_32 (output_bfd,
8260 plt_entry[1] | PPC_LO (got_loc),
8261 htab->plt->contents + ent->plt.offset + 4);
8262 }
8263
8264 bfd_put_32 (output_bfd, plt_entry[2],
8265 htab->plt->contents + ent->plt.offset + 8);
8266 bfd_put_32 (output_bfd, plt_entry[3],
8267 htab->plt->contents + ent->plt.offset + 12);
8268
8269 /* This instruction is an immediate load. The value loaded is
8270 the byte offset of the R_PPC_JMP_SLOT relocation from the
8271 start of the .rela.plt section. The value is stored in the
8272 low-order 16 bits of the load instruction. */
8273 /* NOTE: It appears that this is now an index rather than a
8274 prescaled offset. */
8275 bfd_put_32 (output_bfd,
8276 plt_entry[4] | reloc_index,
8277 htab->plt->contents + ent->plt.offset + 16);
8278 /* This instruction is a PC-relative branch whose target is
8279 the start of the PLT section. The address of this branch
8280 instruction is 20 bytes beyond the start of this PLT entry.
8281 The address is encoded in bits 6-29, inclusive. The value
8282 stored is right-shifted by two bits, permitting a 26-bit
8283 offset. */
8284 bfd_put_32 (output_bfd,
8285 (plt_entry[5]
8286 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8287 htab->plt->contents + ent->plt.offset + 20);
8288 bfd_put_32 (output_bfd, plt_entry[6],
8289 htab->plt->contents + ent->plt.offset + 24);
8290 bfd_put_32 (output_bfd, plt_entry[7],
8291 htab->plt->contents + ent->plt.offset + 28);
8292
8293 /* Fill in the GOT entry corresponding to this PLT slot with
8294 the address immediately after the the "bctr" instruction
8295 in this PLT entry. */
8296 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8297 + htab->plt->output_offset
8298 + ent->plt.offset + 16),
8299 htab->sgotplt->contents + got_offset);
8300
8301 if (!info->shared)
8302 {
8303 /* Fill in a couple of entries in .rela.plt.unloaded. */
8304 loc = htab->srelplt2->contents
8305 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8306 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8307 * sizeof (Elf32_External_Rela));
8308
8309 /* Provide the @ha relocation for the first instruction. */
8310 rela.r_offset = (htab->plt->output_section->vma
8311 + htab->plt->output_offset
8312 + ent->plt.offset + 2);
8313 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8314 R_PPC_ADDR16_HA);
8315 rela.r_addend = got_offset;
8316 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8317 loc += sizeof (Elf32_External_Rela);
8318
8319 /* Provide the @l relocation for the second instruction. */
8320 rela.r_offset = (htab->plt->output_section->vma
8321 + htab->plt->output_offset
8322 + ent->plt.offset + 6);
8323 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8324 R_PPC_ADDR16_LO);
8325 rela.r_addend = got_offset;
8326 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8327 loc += sizeof (Elf32_External_Rela);
8328
8329 /* Provide a relocation for the GOT entry corresponding to this
8330 PLT slot. Point it at the middle of the .plt entry. */
8331 rela.r_offset = (htab->sgotplt->output_section->vma
8332 + htab->sgotplt->output_offset
8333 + got_offset);
8334 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8335 R_PPC_ADDR32);
8336 rela.r_addend = ent->plt.offset + 16;
8337 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8338 }
8339
8340 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8341 In particular, the offset for the relocation is not the
8342 address of the PLT entry for this function, as specified
8343 by the ABI. Instead, the offset is set to the address of
8344 the GOT slot for this function. See EABI 4.4.4.1. */
8345 rela.r_offset = (htab->sgotplt->output_section->vma
8346 + htab->sgotplt->output_offset
8347 + got_offset);
8348
8349 }
8350 else
8351 {
8352 asection *splt = htab->plt;
8353 if (!htab->elf.dynamic_sections_created
8354 || h->dynindx == -1)
8355 splt = htab->iplt;
8356
8357 rela.r_offset = (splt->output_section->vma
8358 + splt->output_offset
8359 + ent->plt.offset);
8360 if (htab->plt_type == PLT_OLD
8361 || !htab->elf.dynamic_sections_created
8362 || h->dynindx == -1)
8363 {
8364 /* We don't need to fill in the .plt. The ppc dynamic
8365 linker will fill it in. */
8366 }
8367 else
8368 {
8369 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8370 + htab->glink->output_section->vma
8371 + htab->glink->output_offset);
8372 bfd_put_32 (output_bfd, val,
8373 splt->contents + ent->plt.offset);
8374 }
8375 }
8376
8377 /* Fill in the entry in the .rela.plt section. */
8378 rela.r_addend = 0;
8379 if (!htab->elf.dynamic_sections_created
8380 || h->dynindx == -1)
8381 {
8382 BFD_ASSERT (h->type == STT_GNU_IFUNC
8383 && h->def_regular
8384 && (h->root.type == bfd_link_hash_defined
8385 || h->root.type == bfd_link_hash_defweak));
8386 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8387 rela.r_addend = SYM_VAL (h);
8388 }
8389 else
8390 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8391
8392 if (!htab->elf.dynamic_sections_created
8393 || h->dynindx == -1)
8394 loc = (htab->reliplt->contents
8395 + (htab->reliplt->reloc_count++
8396 * sizeof (Elf32_External_Rela)));
8397 else
8398 loc = (htab->relplt->contents
8399 + reloc_index * sizeof (Elf32_External_Rela));
8400 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8401
8402 if (!h->def_regular)
8403 {
8404 /* Mark the symbol as undefined, rather than as
8405 defined in the .plt section. Leave the value if
8406 there were any relocations where pointer equality
8407 matters (this is a clue for the dynamic linker, to
8408 make function pointer comparisons work between an
8409 application and shared library), otherwise set it
8410 to zero. */
8411 sym->st_shndx = SHN_UNDEF;
8412 if (!h->pointer_equality_needed)
8413 sym->st_value = 0;
8414 else if (!h->ref_regular_nonweak)
8415 {
8416 /* This breaks function pointer comparisons, but
8417 that is better than breaking tests for a NULL
8418 function pointer. */
8419 sym->st_value = 0;
8420 }
8421 }
8422 else if (h->type == STT_GNU_IFUNC
8423 && !info->shared)
8424 {
8425 /* Set the value of ifunc symbols in a non-pie
8426 executable to the glink entry. This is to avoid
8427 text relocations. We can't do this for ifunc in
8428 allocate_dynrelocs, as we do for normal dynamic
8429 function symbols with plt entries, because we need
8430 to keep the original value around for the ifunc
8431 relocation. */
8432 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8433 (output_bfd, htab->glink->output_section));
8434 sym->st_value = (ent->glink_offset +
8435 htab->glink->output_offset
8436 + htab->glink->output_section->vma);
8437 }
8438 doneone = TRUE;
8439 }
8440
8441 if (htab->plt_type == PLT_NEW
8442 || !htab->elf.dynamic_sections_created
8443 || h->dynindx == -1)
8444 {
8445 unsigned char *p;
8446 asection *splt = htab->plt;
8447 if (!htab->elf.dynamic_sections_created
8448 || h->dynindx == -1)
8449 splt = htab->iplt;
8450
8451 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8452
8453 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8454 {
8455 bfd_put_32 (output_bfd, LWZ_11_3, p);
8456 p += 4;
8457 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8458 p += 4;
8459 bfd_put_32 (output_bfd, MR_0_3, p);
8460 p += 4;
8461 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8462 p += 4;
8463 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8464 p += 4;
8465 bfd_put_32 (output_bfd, BEQLR, p);
8466 p += 4;
8467 bfd_put_32 (output_bfd, MR_3_0, p);
8468 p += 4;
8469 bfd_put_32 (output_bfd, NOP, p);
8470 p += 4;
8471 }
8472
8473 write_glink_stub (ent, splt, p, info);
8474
8475 if (!info->shared)
8476 /* We only need one non-PIC glink stub. */
8477 break;
8478 }
8479 else
8480 break;
8481 }
8482
8483 if (h->needs_copy)
8484 {
8485 asection *s;
8486 Elf_Internal_Rela rela;
8487 bfd_byte *loc;
8488
8489 /* This symbols needs a copy reloc. Set it up. */
8490
8491 #ifdef DEBUG
8492 fprintf (stderr, ", copy");
8493 #endif
8494
8495 BFD_ASSERT (h->dynindx != -1);
8496
8497 if (ppc_elf_hash_entry (h)->has_sda_refs)
8498 s = htab->relsbss;
8499 else
8500 s = htab->relbss;
8501 BFD_ASSERT (s != NULL);
8502
8503 rela.r_offset = SYM_VAL (h);
8504 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8505 rela.r_addend = 0;
8506 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8507 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8508 }
8509
8510 #ifdef DEBUG
8511 fprintf (stderr, "\n");
8512 #endif
8513
8514 /* Mark some specially defined symbols as absolute. */
8515 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8516 || (!htab->is_vxworks
8517 && (h == htab->elf.hgot
8518 || strcmp (h->root.root.string,
8519 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8520 sym->st_shndx = SHN_ABS;
8521
8522 return TRUE;
8523 }
8524 \f
8525 static enum elf_reloc_type_class
8526 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8527 {
8528 switch (ELF32_R_TYPE (rela->r_info))
8529 {
8530 case R_PPC_RELATIVE:
8531 return reloc_class_relative;
8532 case R_PPC_REL24:
8533 case R_PPC_ADDR24:
8534 case R_PPC_JMP_SLOT:
8535 return reloc_class_plt;
8536 case R_PPC_COPY:
8537 return reloc_class_copy;
8538 default:
8539 return reloc_class_normal;
8540 }
8541 }
8542 \f
8543 /* Finish up the dynamic sections. */
8544
8545 static bfd_boolean
8546 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8547 struct bfd_link_info *info)
8548 {
8549 asection *sdyn;
8550 asection *splt;
8551 struct ppc_elf_link_hash_table *htab;
8552 bfd_vma got;
8553 bfd *dynobj;
8554 bfd_boolean ret = TRUE;
8555
8556 #ifdef DEBUG
8557 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8558 #endif
8559
8560 htab = ppc_elf_hash_table (info);
8561 dynobj = elf_hash_table (info)->dynobj;
8562 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8563 if (htab->is_vxworks)
8564 splt = bfd_get_section_by_name (dynobj, ".plt");
8565 else
8566 splt = NULL;
8567
8568 got = 0;
8569 if (htab->elf.hgot != NULL)
8570 got = SYM_VAL (htab->elf.hgot);
8571
8572 if (htab->elf.dynamic_sections_created)
8573 {
8574 Elf32_External_Dyn *dyncon, *dynconend;
8575
8576 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8577
8578 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8579 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8580 for (; dyncon < dynconend; dyncon++)
8581 {
8582 Elf_Internal_Dyn dyn;
8583 asection *s;
8584
8585 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8586
8587 switch (dyn.d_tag)
8588 {
8589 case DT_PLTGOT:
8590 if (htab->is_vxworks)
8591 s = htab->sgotplt;
8592 else
8593 s = htab->plt;
8594 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8595 break;
8596
8597 case DT_PLTRELSZ:
8598 dyn.d_un.d_val = htab->relplt->size;
8599 break;
8600
8601 case DT_JMPREL:
8602 s = htab->relplt;
8603 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8604 break;
8605
8606 case DT_PPC_GOT:
8607 dyn.d_un.d_ptr = got;
8608 break;
8609
8610 case DT_RELASZ:
8611 if (htab->is_vxworks)
8612 {
8613 if (htab->relplt)
8614 dyn.d_un.d_ptr -= htab->relplt->size;
8615 break;
8616 }
8617 continue;
8618
8619 default:
8620 if (htab->is_vxworks
8621 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8622 break;
8623 continue;
8624 }
8625
8626 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8627 }
8628 }
8629
8630 if (htab->got != NULL)
8631 {
8632 if (htab->elf.hgot->root.u.def.section == htab->got
8633 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8634 {
8635 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8636
8637 p += htab->elf.hgot->root.u.def.value;
8638 if (htab->plt_type == PLT_OLD)
8639 {
8640 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8641 so that a function can easily find the address of
8642 _GLOBAL_OFFSET_TABLE_. */
8643 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8644 < htab->elf.hgot->root.u.def.section->size);
8645 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8646 }
8647
8648 if (sdyn != NULL)
8649 {
8650 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8651 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8652 < htab->elf.hgot->root.u.def.section->size);
8653 bfd_put_32 (output_bfd, val, p);
8654 }
8655 }
8656 else
8657 {
8658 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8659 htab->elf.hgot->root.root.string,
8660 (htab->sgotplt != NULL
8661 ? htab->sgotplt->name : htab->got->name));
8662 bfd_set_error (bfd_error_bad_value);
8663 ret = FALSE;
8664 }
8665
8666 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8667 }
8668
8669 /* Fill in the first entry in the VxWorks procedure linkage table. */
8670 if (splt && splt->size > 0)
8671 {
8672 /* Use the right PLT. */
8673 static const bfd_vma *plt_entry = NULL;
8674 plt_entry = info->shared ?
8675 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8676
8677 if (!info->shared)
8678 {
8679 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8680
8681 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8682 splt->contents + 0);
8683 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8684 splt->contents + 4);
8685 }
8686 else
8687 {
8688 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8689 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8690 }
8691 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8692 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8693 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8694 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8695 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8696 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8697
8698 if (! info->shared)
8699 {
8700 Elf_Internal_Rela rela;
8701 bfd_byte *loc;
8702
8703 loc = htab->srelplt2->contents;
8704
8705 /* Output the @ha relocation for the first instruction. */
8706 rela.r_offset = (htab->plt->output_section->vma
8707 + htab->plt->output_offset
8708 + 2);
8709 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8710 rela.r_addend = 0;
8711 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8712 loc += sizeof (Elf32_External_Rela);
8713
8714 /* Output the @l relocation for the second instruction. */
8715 rela.r_offset = (htab->plt->output_section->vma
8716 + htab->plt->output_offset
8717 + 6);
8718 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8719 rela.r_addend = 0;
8720 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8721 loc += sizeof (Elf32_External_Rela);
8722
8723 /* Fix up the remaining relocations. They may have the wrong
8724 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8725 in which symbols were output. */
8726 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8727 {
8728 Elf_Internal_Rela rel;
8729
8730 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8731 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8732 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8733 loc += sizeof (Elf32_External_Rela);
8734
8735 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8736 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8737 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8738 loc += sizeof (Elf32_External_Rela);
8739
8740 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8741 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8742 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8743 loc += sizeof (Elf32_External_Rela);
8744 }
8745 }
8746 }
8747
8748 if (htab->glink != NULL
8749 && htab->glink->contents != NULL
8750 && htab->elf.dynamic_sections_created)
8751 {
8752 unsigned char *p;
8753 unsigned char *endp;
8754 bfd_vma res0;
8755 unsigned int i;
8756
8757 /*
8758 * PIC glink code is the following:
8759 *
8760 * # ith PLT code stub.
8761 * addis 11,30,(plt+(i-1)*4-got)@ha
8762 * lwz 11,(plt+(i-1)*4-got)@l(11)
8763 * mtctr 11
8764 * bctr
8765 *
8766 * # A table of branches, one for each plt entry.
8767 * # The idea is that the plt call stub loads ctr and r11 with these
8768 * # addresses, so (r11 - res_0) gives the plt index * 4.
8769 * res_0: b PLTresolve
8770 * res_1: b PLTresolve
8771 * .
8772 * # Some number of entries towards the end can be nops
8773 * res_n_m3: nop
8774 * res_n_m2: nop
8775 * res_n_m1:
8776 *
8777 * PLTresolve:
8778 * addis 11,11,(1f-res_0)@ha
8779 * mflr 0
8780 * bcl 20,31,1f
8781 * 1: addi 11,11,(1b-res_0)@l
8782 * mflr 12
8783 * mtlr 0
8784 * sub 11,11,12 # r11 = index * 4
8785 * addis 12,12,(got+4-1b)@ha
8786 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8787 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8788 * mtctr 0
8789 * add 0,11,11
8790 * add 11,0,11 # r11 = index * 12 = reloc offset.
8791 * bctr
8792 */
8793 static const unsigned int pic_plt_resolve[] =
8794 {
8795 ADDIS_11_11,
8796 MFLR_0,
8797 BCL_20_31,
8798 ADDI_11_11,
8799 MFLR_12,
8800 MTLR_0,
8801 SUB_11_11_12,
8802 ADDIS_12_12,
8803 LWZ_0_12,
8804 LWZ_12_12,
8805 MTCTR_0,
8806 ADD_0_11_11,
8807 ADD_11_0_11,
8808 BCTR,
8809 NOP,
8810 NOP
8811 };
8812
8813 /*
8814 * Non-PIC glink code is a little simpler.
8815 *
8816 * # ith PLT code stub.
8817 * lis 11,(plt+(i-1)*4)@ha
8818 * lwz 11,(plt+(i-1)*4)@l(11)
8819 * mtctr 11
8820 * bctr
8821 *
8822 * The branch table is the same, then comes
8823 *
8824 * PLTresolve:
8825 * lis 12,(got+4)@ha
8826 * addis 11,11,(-res_0)@ha
8827 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8828 * addi 11,11,(-res_0)@l # r11 = index * 4
8829 * mtctr 0
8830 * add 0,11,11
8831 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8832 * add 11,0,11 # r11 = index * 12 = reloc offset.
8833 * bctr
8834 */
8835 static const unsigned int plt_resolve[] =
8836 {
8837 LIS_12,
8838 ADDIS_11_11,
8839 LWZ_0_12,
8840 ADDI_11_11,
8841 MTCTR_0,
8842 ADD_0_11_11,
8843 LWZ_12_12,
8844 ADD_11_0_11,
8845 BCTR,
8846 NOP,
8847 NOP,
8848 NOP,
8849 NOP,
8850 NOP,
8851 NOP,
8852 NOP
8853 };
8854
8855 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8856 abort ();
8857 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8858 abort ();
8859
8860 /* Build the branch table, one for each plt entry (less one),
8861 and perhaps some padding. */
8862 p = htab->glink->contents;
8863 p += htab->glink_pltresolve;
8864 endp = htab->glink->contents;
8865 endp += htab->glink->size - GLINK_PLTRESOLVE;
8866 while (p < endp - 8 * 4)
8867 {
8868 bfd_put_32 (output_bfd, B + endp - p, p);
8869 p += 4;
8870 }
8871 while (p < endp)
8872 {
8873 bfd_put_32 (output_bfd, NOP, p);
8874 p += 4;
8875 }
8876
8877 res0 = (htab->glink_pltresolve
8878 + htab->glink->output_section->vma
8879 + htab->glink->output_offset);
8880
8881 /* Last comes the PLTresolve stub. */
8882 if (info->shared)
8883 {
8884 bfd_vma bcl;
8885
8886 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8887 {
8888 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8889 p += 4;
8890 }
8891 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8892
8893 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8894 + htab->glink->output_section->vma
8895 + htab->glink->output_offset);
8896
8897 bfd_put_32 (output_bfd,
8898 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8899 bfd_put_32 (output_bfd,
8900 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8901 bfd_put_32 (output_bfd,
8902 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8903 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8904 {
8905 bfd_put_32 (output_bfd,
8906 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8907 bfd_put_32 (output_bfd,
8908 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8909 }
8910 else
8911 {
8912 bfd_put_32 (output_bfd,
8913 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8914 bfd_put_32 (output_bfd,
8915 LWZ_12_12 + 4, p + 9*4);
8916 }
8917 }
8918 else
8919 {
8920 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8921 {
8922 bfd_put_32 (output_bfd, plt_resolve[i], p);
8923 p += 4;
8924 }
8925 p -= 4 * ARRAY_SIZE (plt_resolve);
8926
8927 bfd_put_32 (output_bfd,
8928 LIS_12 + PPC_HA (got + 4), p + 0*4);
8929 bfd_put_32 (output_bfd,
8930 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8931 bfd_put_32 (output_bfd,
8932 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8933 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8934 {
8935 bfd_put_32 (output_bfd,
8936 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8937 bfd_put_32 (output_bfd,
8938 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8939 }
8940 else
8941 {
8942 bfd_put_32 (output_bfd,
8943 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8944 bfd_put_32 (output_bfd,
8945 LWZ_12_12 + 4, p + 6*4);
8946 }
8947 }
8948 }
8949
8950 return ret;
8951 }
8952 \f
8953 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8954 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8955 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8956 #define TARGET_BIG_NAME "elf32-powerpc"
8957 #define ELF_ARCH bfd_arch_powerpc
8958 #define ELF_MACHINE_CODE EM_PPC
8959 #ifdef __QNXTARGET__
8960 #define ELF_MAXPAGESIZE 0x1000
8961 #else
8962 #define ELF_MAXPAGESIZE 0x10000
8963 #endif
8964 #define ELF_MINPAGESIZE 0x1000
8965 #define ELF_COMMONPAGESIZE 0x1000
8966 #define elf_info_to_howto ppc_elf_info_to_howto
8967
8968 #ifdef EM_CYGNUS_POWERPC
8969 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8970 #endif
8971
8972 #ifdef EM_PPC_OLD
8973 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8974 #endif
8975
8976 #define elf_backend_plt_not_loaded 1
8977 #define elf_backend_can_gc_sections 1
8978 #define elf_backend_can_refcount 1
8979 #define elf_backend_rela_normal 1
8980
8981 #define bfd_elf32_mkobject ppc_elf_mkobject
8982 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8983 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8984 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8985 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8986 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8987 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8988 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8989
8990 #define elf_backend_object_p ppc_elf_object_p
8991 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8992 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8993 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8994 #define elf_backend_relocate_section ppc_elf_relocate_section
8995 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8996 #define elf_backend_check_relocs ppc_elf_check_relocs
8997 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8998 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8999 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9000 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9001 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9002 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9003 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9004 #define elf_backend_fake_sections ppc_elf_fake_sections
9005 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9006 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9007 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9008 #define elf_backend_write_core_note ppc_elf_write_core_note
9009 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9010 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9011 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9012 #define elf_backend_write_section ppc_elf_write_section
9013 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9014 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9015 #define elf_backend_action_discarded ppc_elf_action_discarded
9016 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9017 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9018
9019 #include "elf32-target.h"
9020
9021 /* VxWorks Target */
9022
9023 #undef TARGET_LITTLE_SYM
9024 #undef TARGET_LITTLE_NAME
9025
9026 #undef TARGET_BIG_SYM
9027 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9028 #undef TARGET_BIG_NAME
9029 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9030
9031 /* VxWorks uses the elf default section flags for .plt. */
9032 static const struct bfd_elf_special_section *
9033 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9034 {
9035 if (sec->name == NULL)
9036 return NULL;
9037
9038 if (strcmp (sec->name, ".plt") == 0)
9039 return _bfd_elf_get_sec_type_attr (abfd, sec);
9040
9041 return ppc_elf_get_sec_type_attr (abfd, sec);
9042 }
9043
9044 /* Like ppc_elf_link_hash_table_create, but overrides
9045 appropriately for VxWorks. */
9046 static struct bfd_link_hash_table *
9047 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9048 {
9049 struct bfd_link_hash_table *ret;
9050
9051 ret = ppc_elf_link_hash_table_create (abfd);
9052 if (ret)
9053 {
9054 struct ppc_elf_link_hash_table *htab
9055 = (struct ppc_elf_link_hash_table *)ret;
9056 htab->is_vxworks = 1;
9057 htab->plt_type = PLT_VXWORKS;
9058 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9059 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9060 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9061 }
9062 return ret;
9063 }
9064
9065 /* Tweak magic VxWorks symbols as they are loaded. */
9066 static bfd_boolean
9067 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9068 struct bfd_link_info *info,
9069 Elf_Internal_Sym *sym,
9070 const char **namep ATTRIBUTE_UNUSED,
9071 flagword *flagsp ATTRIBUTE_UNUSED,
9072 asection **secp,
9073 bfd_vma *valp)
9074 {
9075 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9076 valp))
9077 return FALSE;
9078
9079 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9080 }
9081
9082 static void
9083 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9084 {
9085 ppc_elf_final_write_processing(abfd, linker);
9086 elf_vxworks_final_write_processing(abfd, linker);
9087 }
9088
9089 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9090 define it. */
9091 #undef elf_backend_want_plt_sym
9092 #define elf_backend_want_plt_sym 1
9093 #undef elf_backend_want_got_plt
9094 #define elf_backend_want_got_plt 1
9095 #undef elf_backend_got_symbol_offset
9096 #define elf_backend_got_symbol_offset 0
9097 #undef elf_backend_plt_not_loaded
9098 #define elf_backend_plt_not_loaded 0
9099 #undef elf_backend_plt_readonly
9100 #define elf_backend_plt_readonly 1
9101 #undef elf_backend_got_header_size
9102 #define elf_backend_got_header_size 12
9103
9104 #undef bfd_elf32_get_synthetic_symtab
9105
9106 #undef bfd_elf32_bfd_link_hash_table_create
9107 #define bfd_elf32_bfd_link_hash_table_create \
9108 ppc_elf_vxworks_link_hash_table_create
9109 #undef elf_backend_add_symbol_hook
9110 #define elf_backend_add_symbol_hook \
9111 ppc_elf_vxworks_add_symbol_hook
9112 #undef elf_backend_link_output_symbol_hook
9113 #define elf_backend_link_output_symbol_hook \
9114 elf_vxworks_link_output_symbol_hook
9115 #undef elf_backend_final_write_processing
9116 #define elf_backend_final_write_processing \
9117 ppc_elf_vxworks_final_write_processing
9118 #undef elf_backend_get_sec_type_attr
9119 #define elf_backend_get_sec_type_attr \
9120 ppc_elf_vxworks_get_sec_type_attr
9121 #undef elf_backend_emit_relocs
9122 #define elf_backend_emit_relocs \
9123 elf_vxworks_emit_relocs
9124
9125 #undef elf32_bed
9126 #define elf32_bed ppc_elf_vxworks_bed
9127 #undef elf_backend_post_process_headers
9128
9129 #include "elf32-target.h"
GDB Binutils - Deliverables
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