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PR ld/11047
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64 #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_TDATA)
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_TDATA);
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 ((struct ppc_elf_link_hash_table *) (p)->hash)
2786
2787 /* Create an entry in a PPC ELF linker hash table. */
2788
2789 static struct bfd_hash_entry *
2790 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2791 struct bfd_hash_table *table,
2792 const char *string)
2793 {
2794 /* Allocate the structure if it has not already been allocated by a
2795 subclass. */
2796 if (entry == NULL)
2797 {
2798 entry = bfd_hash_allocate (table,
2799 sizeof (struct ppc_elf_link_hash_entry));
2800 if (entry == NULL)
2801 return entry;
2802 }
2803
2804 /* Call the allocation method of the superclass. */
2805 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2806 if (entry != NULL)
2807 {
2808 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2809 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2810 ppc_elf_hash_entry (entry)->tls_mask = 0;
2811 }
2812
2813 return entry;
2814 }
2815
2816 /* Create a PPC ELF linker hash table. */
2817
2818 static struct bfd_link_hash_table *
2819 ppc_elf_link_hash_table_create (bfd *abfd)
2820 {
2821 struct ppc_elf_link_hash_table *ret;
2822
2823 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2824 if (ret == NULL)
2825 return NULL;
2826
2827 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2828 ppc_elf_link_hash_newfunc,
2829 sizeof (struct ppc_elf_link_hash_entry)))
2830 {
2831 free (ret);
2832 return NULL;
2833 }
2834
2835 ret->elf.init_plt_refcount.refcount = 0;
2836 ret->elf.init_plt_refcount.glist = NULL;
2837 ret->elf.init_plt_offset.offset = 0;
2838 ret->elf.init_plt_offset.glist = NULL;
2839
2840 ret->sdata[0].name = ".sdata";
2841 ret->sdata[0].sym_name = "_SDA_BASE_";
2842 ret->sdata[0].bss_name = ".sbss";
2843
2844 ret->sdata[1].name = ".sdata2";
2845 ret->sdata[1].sym_name = "_SDA2_BASE_";
2846 ret->sdata[1].bss_name = ".sbss2";
2847
2848 ret->plt_entry_size = 12;
2849 ret->plt_slot_size = 8;
2850 ret->plt_initial_entry_size = 72;
2851
2852 return &ret->elf.root;
2853 }
2854
2855 /* Create .got and the related sections. */
2856
2857 static bfd_boolean
2858 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2859 {
2860 struct ppc_elf_link_hash_table *htab;
2861 asection *s;
2862 flagword flags;
2863
2864 if (!_bfd_elf_create_got_section (abfd, info))
2865 return FALSE;
2866
2867 htab = ppc_elf_hash_table (info);
2868 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2869 if (s == NULL)
2870 abort ();
2871
2872 if (htab->is_vxworks)
2873 {
2874 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2875 if (!htab->sgotplt)
2876 abort ();
2877 }
2878 else
2879 {
2880 /* The powerpc .got has a blrl instruction in it. Mark it
2881 executable. */
2882 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2883 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2884 if (!bfd_set_section_flags (abfd, s, flags))
2885 return FALSE;
2886 }
2887
2888 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2889 if (!htab->relgot)
2890 abort ();
2891
2892 return TRUE;
2893 }
2894
2895 static bfd_boolean
2896 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2897 {
2898 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2899 asection *s;
2900 flagword flags;
2901
2902 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2903 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2904 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2905 htab->glink = s;
2906 if (s == NULL
2907 || !bfd_set_section_alignment (abfd, s, 4))
2908 return FALSE;
2909
2910 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2911 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2912 htab->iplt = s;
2913 if (s == NULL
2914 || !bfd_set_section_alignment (abfd, s, 4))
2915 return FALSE;
2916
2917 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2918 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2919 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2920 htab->reliplt = s;
2921 if (s == NULL
2922 || ! bfd_set_section_alignment (abfd, s, 2))
2923 return FALSE;
2924 return TRUE;
2925 }
2926
2927 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2928 to output sections (just like _bfd_elf_create_dynamic_sections has
2929 to create .dynbss and .rela.bss). */
2930
2931 static bfd_boolean
2932 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2933 {
2934 struct ppc_elf_link_hash_table *htab;
2935 asection *s;
2936 flagword flags;
2937
2938 htab = ppc_elf_hash_table (info);
2939
2940 if (htab->got == NULL
2941 && !ppc_elf_create_got (abfd, info))
2942 return FALSE;
2943
2944 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2945 return FALSE;
2946
2947 if (htab->glink == NULL
2948 && !ppc_elf_create_glink (abfd, info))
2949 return FALSE;
2950
2951 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2952 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2953 SEC_ALLOC | SEC_LINKER_CREATED);
2954 htab->dynsbss = s;
2955 if (s == NULL)
2956 return FALSE;
2957
2958 if (! info->shared)
2959 {
2960 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2961 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2962 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2963 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2964 htab->relsbss = s;
2965 if (s == NULL
2966 || ! bfd_set_section_alignment (abfd, s, 2))
2967 return FALSE;
2968 }
2969
2970 if (htab->is_vxworks
2971 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2972 return FALSE;
2973
2974 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2975 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2976 if (s == NULL)
2977 abort ();
2978
2979 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2980 if (htab->plt_type == PLT_VXWORKS)
2981 /* The VxWorks PLT is a loaded section with contents. */
2982 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2983 return bfd_set_section_flags (abfd, s, flags);
2984 }
2985
2986 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2987
2988 static void
2989 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2990 struct elf_link_hash_entry *dir,
2991 struct elf_link_hash_entry *ind)
2992 {
2993 struct ppc_elf_link_hash_entry *edir, *eind;
2994
2995 edir = (struct ppc_elf_link_hash_entry *) dir;
2996 eind = (struct ppc_elf_link_hash_entry *) ind;
2997
2998 if (eind->dyn_relocs != NULL)
2999 {
3000 if (edir->dyn_relocs != NULL)
3001 {
3002 struct ppc_elf_dyn_relocs **pp;
3003 struct ppc_elf_dyn_relocs *p;
3004
3005 /* Add reloc counts against the indirect sym to the direct sym
3006 list. Merge any entries against the same section. */
3007 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3008 {
3009 struct ppc_elf_dyn_relocs *q;
3010
3011 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3012 if (q->sec == p->sec)
3013 {
3014 q->pc_count += p->pc_count;
3015 q->count += p->count;
3016 *pp = p->next;
3017 break;
3018 }
3019 if (q == NULL)
3020 pp = &p->next;
3021 }
3022 *pp = edir->dyn_relocs;
3023 }
3024
3025 edir->dyn_relocs = eind->dyn_relocs;
3026 eind->dyn_relocs = NULL;
3027 }
3028
3029 edir->tls_mask |= eind->tls_mask;
3030 edir->has_sda_refs |= eind->has_sda_refs;
3031
3032 /* If called to transfer flags for a weakdef during processing
3033 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3034 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3035 if (!(ELIMINATE_COPY_RELOCS
3036 && eind->elf.root.type != bfd_link_hash_indirect
3037 && edir->elf.dynamic_adjusted))
3038 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3039
3040 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3041 edir->elf.ref_regular |= eind->elf.ref_regular;
3042 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3043 edir->elf.needs_plt |= eind->elf.needs_plt;
3044 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3045
3046 /* If we were called to copy over info for a weak sym, that's all. */
3047 if (eind->elf.root.type != bfd_link_hash_indirect)
3048 return;
3049
3050 /* Copy over the GOT refcount entries that we may have already seen to
3051 the symbol which just became indirect. */
3052 edir->elf.got.refcount += eind->elf.got.refcount;
3053 eind->elf.got.refcount = 0;
3054
3055 /* And plt entries. */
3056 if (eind->elf.plt.plist != NULL)
3057 {
3058 if (edir->elf.plt.plist != NULL)
3059 {
3060 struct plt_entry **entp;
3061 struct plt_entry *ent;
3062
3063 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3064 {
3065 struct plt_entry *dent;
3066
3067 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3068 if (dent->sec == ent->sec && dent->addend == ent->addend)
3069 {
3070 dent->plt.refcount += ent->plt.refcount;
3071 *entp = ent->next;
3072 break;
3073 }
3074 if (dent == NULL)
3075 entp = &ent->next;
3076 }
3077 *entp = edir->elf.plt.plist;
3078 }
3079
3080 edir->elf.plt.plist = eind->elf.plt.plist;
3081 eind->elf.plt.plist = NULL;
3082 }
3083
3084 if (eind->elf.dynindx != -1)
3085 {
3086 if (edir->elf.dynindx != -1)
3087 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3088 edir->elf.dynstr_index);
3089 edir->elf.dynindx = eind->elf.dynindx;
3090 edir->elf.dynstr_index = eind->elf.dynstr_index;
3091 eind->elf.dynindx = -1;
3092 eind->elf.dynstr_index = 0;
3093 }
3094 }
3095
3096 /* Hook called by the linker routine which adds symbols from an object
3097 file. We use it to put .comm items in .sbss, and not .bss. */
3098
3099 static bfd_boolean
3100 ppc_elf_add_symbol_hook (bfd *abfd,
3101 struct bfd_link_info *info,
3102 Elf_Internal_Sym *sym,
3103 const char **namep ATTRIBUTE_UNUSED,
3104 flagword *flagsp ATTRIBUTE_UNUSED,
3105 asection **secp,
3106 bfd_vma *valp)
3107 {
3108 if (sym->st_shndx == SHN_COMMON
3109 && !info->relocatable
3110 && is_ppc_elf (info->output_bfd)
3111 && sym->st_size <= elf_gp_size (abfd))
3112 {
3113 /* Common symbols less than or equal to -G nn bytes are automatically
3114 put into .sbss. */
3115 struct ppc_elf_link_hash_table *htab;
3116
3117 htab = ppc_elf_hash_table (info);
3118 if (htab->sbss == NULL)
3119 {
3120 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3121
3122 if (!htab->elf.dynobj)
3123 htab->elf.dynobj = abfd;
3124
3125 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3126 ".sbss",
3127 flags);
3128 if (htab->sbss == NULL)
3129 return FALSE;
3130 }
3131
3132 *secp = htab->sbss;
3133 *valp = sym->st_size;
3134 }
3135
3136 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3137 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3138
3139 return TRUE;
3140 }
3141 \f
3142 static bfd_boolean
3143 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3144 {
3145 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3146
3147 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3148 TRUE, FALSE, TRUE);
3149 if (lsect->sym == NULL)
3150 return FALSE;
3151 if (lsect->sym->root.type == bfd_link_hash_new)
3152 lsect->sym->non_elf = 0;
3153 lsect->sym->ref_regular = 1;
3154 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3155 return TRUE;
3156 }
3157
3158 /* Create a special linker section. */
3159
3160 static bfd_boolean
3161 ppc_elf_create_linker_section (bfd *abfd,
3162 struct bfd_link_info *info,
3163 flagword flags,
3164 elf_linker_section_t *lsect)
3165 {
3166 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3167 asection *s;
3168
3169 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3170 | SEC_LINKER_CREATED);
3171
3172 /* Record the first bfd that needs the special sections. */
3173 if (!htab->elf.dynobj)
3174 htab->elf.dynobj = abfd;
3175
3176 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3177 lsect->name,
3178 flags);
3179 if (s == NULL
3180 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3181 return FALSE;
3182 lsect->section = s;
3183
3184 return create_sdata_sym (info, lsect);
3185 }
3186
3187 /* Find a linker generated pointer with a given addend and type. */
3188
3189 static elf_linker_section_pointers_t *
3190 elf_find_pointer_linker_section
3191 (elf_linker_section_pointers_t *linker_pointers,
3192 bfd_vma addend,
3193 elf_linker_section_t *lsect)
3194 {
3195 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3196 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3197 return linker_pointers;
3198
3199 return NULL;
3200 }
3201
3202 /* Allocate a pointer to live in a linker created section. */
3203
3204 static bfd_boolean
3205 elf_create_pointer_linker_section (bfd *abfd,
3206 elf_linker_section_t *lsect,
3207 struct elf_link_hash_entry *h,
3208 const Elf_Internal_Rela *rel)
3209 {
3210 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3211 elf_linker_section_pointers_t *linker_section_ptr;
3212 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3213 bfd_size_type amt;
3214
3215 BFD_ASSERT (lsect != NULL);
3216
3217 /* Is this a global symbol? */
3218 if (h != NULL)
3219 {
3220 struct ppc_elf_link_hash_entry *eh;
3221
3222 /* Has this symbol already been allocated? If so, our work is done. */
3223 eh = (struct ppc_elf_link_hash_entry *) h;
3224 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3225 rel->r_addend,
3226 lsect))
3227 return TRUE;
3228
3229 ptr_linker_section_ptr = &eh->linker_section_pointer;
3230 }
3231 else
3232 {
3233 BFD_ASSERT (is_ppc_elf (abfd));
3234
3235 /* Allocation of a pointer to a local symbol. */
3236 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3237
3238 /* Allocate a table to hold the local symbols if first time. */
3239 if (!ptr)
3240 {
3241 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3242
3243 amt = num_symbols;
3244 amt *= sizeof (elf_linker_section_pointers_t *);
3245 ptr = bfd_zalloc (abfd, amt);
3246
3247 if (!ptr)
3248 return FALSE;
3249
3250 elf_local_ptr_offsets (abfd) = ptr;
3251 }
3252
3253 /* Has this symbol already been allocated? If so, our work is done. */
3254 if (elf_find_pointer_linker_section (ptr[r_symndx],
3255 rel->r_addend,
3256 lsect))
3257 return TRUE;
3258
3259 ptr_linker_section_ptr = &ptr[r_symndx];
3260 }
3261
3262 /* Allocate space for a pointer in the linker section, and allocate
3263 a new pointer record from internal memory. */
3264 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3265 amt = sizeof (elf_linker_section_pointers_t);
3266 linker_section_ptr = bfd_alloc (abfd, amt);
3267
3268 if (!linker_section_ptr)
3269 return FALSE;
3270
3271 linker_section_ptr->next = *ptr_linker_section_ptr;
3272 linker_section_ptr->addend = rel->r_addend;
3273 linker_section_ptr->lsect = lsect;
3274 *ptr_linker_section_ptr = linker_section_ptr;
3275
3276 linker_section_ptr->offset = lsect->section->size;
3277 lsect->section->size += 4;
3278
3279 #ifdef DEBUG
3280 fprintf (stderr,
3281 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3282 lsect->name, (long) linker_section_ptr->offset,
3283 (long) lsect->section->size);
3284 #endif
3285
3286 return TRUE;
3287 }
3288
3289 static struct plt_entry **
3290 update_local_sym_info (bfd *abfd,
3291 Elf_Internal_Shdr *symtab_hdr,
3292 unsigned long r_symndx,
3293 int tls_type)
3294 {
3295 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3296 struct plt_entry **local_plt;
3297 char *local_got_tls_masks;
3298
3299 if (local_got_refcounts == NULL)
3300 {
3301 bfd_size_type size = symtab_hdr->sh_info;
3302
3303 size *= (sizeof (*local_got_refcounts)
3304 + sizeof (*local_plt)
3305 + sizeof (*local_got_tls_masks));
3306 local_got_refcounts = bfd_zalloc (abfd, size);
3307 if (local_got_refcounts == NULL)
3308 return NULL;
3309 elf_local_got_refcounts (abfd) = local_got_refcounts;
3310 }
3311
3312 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3313 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3314 local_got_tls_masks[r_symndx] |= tls_type;
3315 if (tls_type != PLT_IFUNC)
3316 local_got_refcounts[r_symndx] += 1;
3317 return local_plt + r_symndx;
3318 }
3319
3320 static bfd_boolean
3321 update_plt_info (bfd *abfd, struct plt_entry **plist,
3322 asection *sec, bfd_vma addend)
3323 {
3324 struct plt_entry *ent;
3325
3326 for (ent = *plist; ent != NULL; ent = ent->next)
3327 if (ent->sec == sec && ent->addend == addend)
3328 break;
3329 if (ent == NULL)
3330 {
3331 bfd_size_type amt = sizeof (*ent);
3332 ent = bfd_alloc (abfd, amt);
3333 if (ent == NULL)
3334 return FALSE;
3335 ent->next = *plist;
3336 ent->sec = sec;
3337 ent->addend = addend;
3338 ent->plt.refcount = 0;
3339 *plist = ent;
3340 }
3341 ent->plt.refcount += 1;
3342 return TRUE;
3343 }
3344
3345 static struct plt_entry *
3346 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3347 {
3348 struct plt_entry *ent;
3349
3350 if (addend < 32768)
3351 sec = NULL;
3352 for (ent = *plist; ent != NULL; ent = ent->next)
3353 if (ent->sec == sec && ent->addend == addend)
3354 break;
3355 return ent;
3356 }
3357
3358 static bfd_boolean
3359 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3360 {
3361 return (r_type == R_PPC_PLTREL24
3362 || r_type == R_PPC_LOCAL24PC
3363 || r_type == R_PPC_REL24
3364 || r_type == R_PPC_REL14
3365 || r_type == R_PPC_REL14_BRTAKEN
3366 || r_type == R_PPC_REL14_BRNTAKEN
3367 || r_type == R_PPC_ADDR24
3368 || r_type == R_PPC_ADDR14
3369 || r_type == R_PPC_ADDR14_BRTAKEN
3370 || r_type == R_PPC_ADDR14_BRNTAKEN);
3371 }
3372
3373 static void
3374 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3375 {
3376 (*_bfd_error_handler)
3377 (_("%B: relocation %s cannot be used when making a shared object"),
3378 abfd,
3379 ppc_elf_howto_table[r_type]->name);
3380 bfd_set_error (bfd_error_bad_value);
3381 }
3382
3383 /* Look through the relocs for a section during the first phase, and
3384 allocate space in the global offset table or procedure linkage
3385 table. */
3386
3387 static bfd_boolean
3388 ppc_elf_check_relocs (bfd *abfd,
3389 struct bfd_link_info *info,
3390 asection *sec,
3391 const Elf_Internal_Rela *relocs)
3392 {
3393 struct ppc_elf_link_hash_table *htab;
3394 Elf_Internal_Shdr *symtab_hdr;
3395 struct elf_link_hash_entry **sym_hashes;
3396 const Elf_Internal_Rela *rel;
3397 const Elf_Internal_Rela *rel_end;
3398 asection *got2, *sreloc;
3399 struct elf_link_hash_entry *tga;
3400
3401 if (info->relocatable)
3402 return TRUE;
3403
3404 /* Don't do anything special with non-loaded, non-alloced sections.
3405 In particular, any relocs in such sections should not affect GOT
3406 and PLT reference counting (ie. we don't allow them to create GOT
3407 or PLT entries), there's no possibility or desire to optimize TLS
3408 relocs, and there's not much point in propagating relocs to shared
3409 libs that the dynamic linker won't relocate. */
3410 if ((sec->flags & SEC_ALLOC) == 0)
3411 return TRUE;
3412
3413 #ifdef DEBUG
3414 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3415 sec, abfd);
3416 #endif
3417
3418 BFD_ASSERT (is_ppc_elf (abfd));
3419
3420 /* Initialize howto table if not already done. */
3421 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3422 ppc_elf_howto_init ();
3423
3424 htab = ppc_elf_hash_table (info);
3425 if (htab->glink == NULL)
3426 {
3427 if (htab->elf.dynobj == NULL)
3428 htab->elf.dynobj = abfd;
3429 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3430 return FALSE;
3431 }
3432 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3433 FALSE, FALSE, TRUE);
3434 symtab_hdr = &elf_symtab_hdr (abfd);
3435 sym_hashes = elf_sym_hashes (abfd);
3436 got2 = bfd_get_section_by_name (abfd, ".got2");
3437 sreloc = NULL;
3438
3439 rel_end = relocs + sec->reloc_count;
3440 for (rel = relocs; rel < rel_end; rel++)
3441 {
3442 unsigned long r_symndx;
3443 enum elf_ppc_reloc_type r_type;
3444 struct elf_link_hash_entry *h;
3445 int tls_type;
3446 struct plt_entry **ifunc;
3447
3448 r_symndx = ELF32_R_SYM (rel->r_info);
3449 if (r_symndx < symtab_hdr->sh_info)
3450 h = NULL;
3451 else
3452 {
3453 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3454 while (h->root.type == bfd_link_hash_indirect
3455 || h->root.type == bfd_link_hash_warning)
3456 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3457 }
3458
3459 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3460 This shows up in particular in an R_PPC_ADDR32 in the eabi
3461 startup code. */
3462 if (h != NULL
3463 && htab->got == NULL
3464 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3465 {
3466 if (htab->elf.dynobj == NULL)
3467 htab->elf.dynobj = abfd;
3468 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3469 return FALSE;
3470 BFD_ASSERT (h == htab->elf.hgot);
3471 }
3472
3473 tls_type = 0;
3474 ifunc = NULL;
3475 r_type = ELF32_R_TYPE (rel->r_info);
3476 if (!htab->is_vxworks)
3477 {
3478 if (h != NULL)
3479 {
3480 if (h->type == STT_GNU_IFUNC)
3481 ifunc = &h->plt.plist;
3482 }
3483 else
3484 {
3485 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3486 abfd, r_symndx);
3487 if (isym == NULL)
3488 return FALSE;
3489
3490 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3491 && (!info->shared
3492 || is_branch_reloc (r_type)))
3493 {
3494 bfd_vma addend;
3495
3496 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3497 PLT_IFUNC);
3498 if (ifunc == NULL)
3499 return FALSE;
3500
3501 /* STT_GNU_IFUNC symbols must have a PLT entry;
3502 In a non-pie executable even when there are
3503 no plt calls. */
3504 addend = 0;
3505 if (r_type == R_PPC_PLTREL24)
3506 {
3507 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3508 if (info->shared)
3509 addend = rel->r_addend;
3510 }
3511 if (!update_plt_info (abfd, ifunc,
3512 addend < 32768 ? NULL : got2, addend))
3513 return FALSE;
3514 }
3515 }
3516 }
3517
3518 if (!htab->is_vxworks
3519 && is_branch_reloc (r_type)
3520 && h != NULL
3521 && h == tga)
3522 {
3523 if (rel != relocs
3524 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3525 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3526 /* We have a new-style __tls_get_addr call with a marker
3527 reloc. */
3528 ;
3529 else
3530 /* Mark this section as having an old-style call. */
3531 sec->has_tls_get_addr_call = 1;
3532 }
3533
3534 switch (r_type)
3535 {
3536 case R_PPC_TLSGD:
3537 case R_PPC_TLSLD:
3538 /* These special tls relocs tie a call to __tls_get_addr with
3539 its parameter symbol. */
3540 break;
3541
3542 case R_PPC_GOT_TLSLD16:
3543 case R_PPC_GOT_TLSLD16_LO:
3544 case R_PPC_GOT_TLSLD16_HI:
3545 case R_PPC_GOT_TLSLD16_HA:
3546 tls_type = TLS_TLS | TLS_LD;
3547 goto dogottls;
3548
3549 case R_PPC_GOT_TLSGD16:
3550 case R_PPC_GOT_TLSGD16_LO:
3551 case R_PPC_GOT_TLSGD16_HI:
3552 case R_PPC_GOT_TLSGD16_HA:
3553 tls_type = TLS_TLS | TLS_GD;
3554 goto dogottls;
3555
3556 case R_PPC_GOT_TPREL16:
3557 case R_PPC_GOT_TPREL16_LO:
3558 case R_PPC_GOT_TPREL16_HI:
3559 case R_PPC_GOT_TPREL16_HA:
3560 if (!info->executable)
3561 info->flags |= DF_STATIC_TLS;
3562 tls_type = TLS_TLS | TLS_TPREL;
3563 goto dogottls;
3564
3565 case R_PPC_GOT_DTPREL16:
3566 case R_PPC_GOT_DTPREL16_LO:
3567 case R_PPC_GOT_DTPREL16_HI:
3568 case R_PPC_GOT_DTPREL16_HA:
3569 tls_type = TLS_TLS | TLS_DTPREL;
3570 dogottls:
3571 sec->has_tls_reloc = 1;
3572 /* Fall thru */
3573
3574 /* GOT16 relocations */
3575 case R_PPC_GOT16:
3576 case R_PPC_GOT16_LO:
3577 case R_PPC_GOT16_HI:
3578 case R_PPC_GOT16_HA:
3579 /* This symbol requires a global offset table entry. */
3580 if (htab->got == NULL)
3581 {
3582 if (htab->elf.dynobj == NULL)
3583 htab->elf.dynobj = abfd;
3584 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3585 return FALSE;
3586 }
3587 if (h != NULL)
3588 {
3589 h->got.refcount += 1;
3590 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3591 }
3592 else
3593 /* This is a global offset table entry for a local symbol. */
3594 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3595 return FALSE;
3596
3597 /* We may also need a plt entry if the symbol turns out to be
3598 an ifunc. */
3599 if (h != NULL && !info->shared)
3600 {
3601 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3602 return FALSE;
3603 }
3604 break;
3605
3606 /* Indirect .sdata relocation. */
3607 case R_PPC_EMB_SDAI16:
3608 if (info->shared)
3609 {
3610 bad_shared_reloc (abfd, r_type);
3611 return FALSE;
3612 }
3613 if (htab->sdata[0].section == NULL
3614 && !ppc_elf_create_linker_section (abfd, info, 0,
3615 &htab->sdata[0]))
3616 return FALSE;
3617 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3618 h, rel))
3619 return FALSE;
3620 if (h != NULL)
3621 {
3622 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3623 h->non_got_ref = TRUE;
3624 }
3625 break;
3626
3627 /* Indirect .sdata2 relocation. */
3628 case R_PPC_EMB_SDA2I16:
3629 if (info->shared)
3630 {
3631 bad_shared_reloc (abfd, r_type);
3632 return FALSE;
3633 }
3634 if (htab->sdata[1].section == NULL
3635 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3636 &htab->sdata[1]))
3637 return FALSE;
3638 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3639 h, rel))
3640 return FALSE;
3641 if (h != NULL)
3642 {
3643 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3644 h->non_got_ref = TRUE;
3645 }
3646 break;
3647
3648 case R_PPC_SDAREL16:
3649 if (htab->sdata[0].sym == NULL
3650 && !create_sdata_sym (info, &htab->sdata[0]))
3651 return FALSE;
3652 if (h != NULL)
3653 {
3654 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3655 h->non_got_ref = TRUE;
3656 }
3657 break;
3658
3659 case R_PPC_EMB_SDA2REL:
3660 if (info->shared)
3661 {
3662 bad_shared_reloc (abfd, r_type);
3663 return FALSE;
3664 }
3665 if (htab->sdata[1].sym == NULL
3666 && !create_sdata_sym (info, &htab->sdata[1]))
3667 return FALSE;
3668 if (h != NULL)
3669 {
3670 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3671 h->non_got_ref = TRUE;
3672 }
3673 break;
3674
3675 case R_PPC_EMB_SDA21:
3676 case R_PPC_EMB_RELSDA:
3677 if (info->shared)
3678 {
3679 bad_shared_reloc (abfd, r_type);
3680 return FALSE;
3681 }
3682 if (htab->sdata[0].sym == NULL
3683 && !create_sdata_sym (info, &htab->sdata[0]))
3684 return FALSE;
3685 if (htab->sdata[1].sym == NULL
3686 && !create_sdata_sym (info, &htab->sdata[1]))
3687 return FALSE;
3688 if (h != NULL)
3689 {
3690 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3691 h->non_got_ref = TRUE;
3692 }
3693 break;
3694
3695 case R_PPC_EMB_NADDR32:
3696 case R_PPC_EMB_NADDR16:
3697 case R_PPC_EMB_NADDR16_LO:
3698 case R_PPC_EMB_NADDR16_HI:
3699 case R_PPC_EMB_NADDR16_HA:
3700 if (info->shared)
3701 {
3702 bad_shared_reloc (abfd, r_type);
3703 return FALSE;
3704 }
3705 if (h != NULL)
3706 h->non_got_ref = TRUE;
3707 break;
3708
3709 case R_PPC_PLTREL24:
3710 if (h == NULL)
3711 break;
3712 /* Fall through */
3713 case R_PPC_PLT32:
3714 case R_PPC_PLTREL32:
3715 case R_PPC_PLT16_LO:
3716 case R_PPC_PLT16_HI:
3717 case R_PPC_PLT16_HA:
3718 #ifdef DEBUG
3719 fprintf (stderr, "Reloc requires a PLT entry\n");
3720 #endif
3721 /* This symbol requires a procedure linkage table entry. We
3722 actually build the entry in finish_dynamic_symbol,
3723 because this might be a case of linking PIC code without
3724 linking in any dynamic objects, in which case we don't
3725 need to generate a procedure linkage table after all. */
3726
3727 if (h == NULL)
3728 {
3729 /* It does not make sense to have a procedure linkage
3730 table entry for a local symbol. */
3731 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3732 "local symbol"),
3733 abfd,
3734 sec,
3735 (long) rel->r_offset,
3736 ppc_elf_howto_table[r_type]->name);
3737 bfd_set_error (bfd_error_bad_value);
3738 return FALSE;
3739 }
3740 else
3741 {
3742 bfd_vma addend = 0;
3743
3744 if (r_type == R_PPC_PLTREL24)
3745 {
3746 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3747 if (info->shared)
3748 addend = rel->r_addend;
3749 }
3750 h->needs_plt = 1;
3751 if (!update_plt_info (abfd, &h->plt.plist,
3752 addend < 32768 ? NULL : got2, addend))
3753 return FALSE;
3754 }
3755 break;
3756
3757 /* The following relocations don't need to propagate the
3758 relocation if linking a shared object since they are
3759 section relative. */
3760 case R_PPC_SECTOFF:
3761 case R_PPC_SECTOFF_LO:
3762 case R_PPC_SECTOFF_HI:
3763 case R_PPC_SECTOFF_HA:
3764 case R_PPC_DTPREL16:
3765 case R_PPC_DTPREL16_LO:
3766 case R_PPC_DTPREL16_HI:
3767 case R_PPC_DTPREL16_HA:
3768 case R_PPC_TOC16:
3769 break;
3770
3771 case R_PPC_REL16:
3772 case R_PPC_REL16_LO:
3773 case R_PPC_REL16_HI:
3774 case R_PPC_REL16_HA:
3775 ppc_elf_tdata (abfd)->has_rel16 = 1;
3776 break;
3777
3778 /* These are just markers. */
3779 case R_PPC_TLS:
3780 case R_PPC_EMB_MRKREF:
3781 case R_PPC_NONE:
3782 case R_PPC_max:
3783 case R_PPC_RELAX32:
3784 case R_PPC_RELAX32PC:
3785 case R_PPC_RELAX32_PLT:
3786 case R_PPC_RELAX32PC_PLT:
3787 break;
3788
3789 /* These should only appear in dynamic objects. */
3790 case R_PPC_COPY:
3791 case R_PPC_GLOB_DAT:
3792 case R_PPC_JMP_SLOT:
3793 case R_PPC_RELATIVE:
3794 case R_PPC_IRELATIVE:
3795 break;
3796
3797 /* These aren't handled yet. We'll report an error later. */
3798 case R_PPC_ADDR30:
3799 case R_PPC_EMB_RELSEC16:
3800 case R_PPC_EMB_RELST_LO:
3801 case R_PPC_EMB_RELST_HI:
3802 case R_PPC_EMB_RELST_HA:
3803 case R_PPC_EMB_BIT_FLD:
3804 break;
3805
3806 /* This refers only to functions defined in the shared library. */
3807 case R_PPC_LOCAL24PC:
3808 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3809 {
3810 htab->plt_type = PLT_OLD;
3811 htab->old_bfd = abfd;
3812 }
3813 break;
3814
3815 /* This relocation describes the C++ object vtable hierarchy.
3816 Reconstruct it for later use during GC. */
3817 case R_PPC_GNU_VTINHERIT:
3818 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3819 return FALSE;
3820 break;
3821
3822 /* This relocation describes which C++ vtable entries are actually
3823 used. Record for later use during GC. */
3824 case R_PPC_GNU_VTENTRY:
3825 BFD_ASSERT (h != NULL);
3826 if (h != NULL
3827 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3828 return FALSE;
3829 break;
3830
3831 /* We shouldn't really be seeing these. */
3832 case R_PPC_TPREL32:
3833 case R_PPC_TPREL16:
3834 case R_PPC_TPREL16_LO:
3835 case R_PPC_TPREL16_HI:
3836 case R_PPC_TPREL16_HA:
3837 if (!info->executable)
3838 info->flags |= DF_STATIC_TLS;
3839 goto dodyn;
3840
3841 /* Nor these. */
3842 case R_PPC_DTPMOD32:
3843 case R_PPC_DTPREL32:
3844 goto dodyn;
3845
3846 case R_PPC_REL32:
3847 if (h == NULL
3848 && got2 != NULL
3849 && (sec->flags & SEC_CODE) != 0
3850 && info->shared
3851 && htab->plt_type == PLT_UNSET)
3852 {
3853 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3854 the start of a function, which assembles to a REL32
3855 reference to .got2. If we detect one of these, then
3856 force the old PLT layout because the linker cannot
3857 reliably deduce the GOT pointer value needed for
3858 PLT call stubs. */
3859 asection *s;
3860 Elf_Internal_Sym *isym;
3861
3862 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3863 abfd, r_symndx);
3864 if (isym == NULL)
3865 return FALSE;
3866
3867 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3868 if (s == got2)
3869 {
3870 htab->plt_type = PLT_OLD;
3871 htab->old_bfd = abfd;
3872 }
3873 }
3874 if (h == NULL || h == htab->elf.hgot)
3875 break;
3876 /* fall through */
3877
3878 case R_PPC_ADDR32:
3879 case R_PPC_ADDR16:
3880 case R_PPC_ADDR16_LO:
3881 case R_PPC_ADDR16_HI:
3882 case R_PPC_ADDR16_HA:
3883 case R_PPC_UADDR32:
3884 case R_PPC_UADDR16:
3885 if (h != NULL && !info->shared)
3886 {
3887 /* We may need a plt entry if the symbol turns out to be
3888 a function defined in a dynamic object. */
3889 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3890 return FALSE;
3891
3892 /* We may need a copy reloc too. */
3893 h->non_got_ref = 1;
3894 h->pointer_equality_needed = 1;
3895 }
3896 goto dodyn;
3897
3898 case R_PPC_REL24:
3899 case R_PPC_REL14:
3900 case R_PPC_REL14_BRTAKEN:
3901 case R_PPC_REL14_BRNTAKEN:
3902 if (h == NULL)
3903 break;
3904 if (h == htab->elf.hgot)
3905 {
3906 if (htab->plt_type == PLT_UNSET)
3907 {
3908 htab->plt_type = PLT_OLD;
3909 htab->old_bfd = abfd;
3910 }
3911 break;
3912 }
3913 /* fall through */
3914
3915 case R_PPC_ADDR24:
3916 case R_PPC_ADDR14:
3917 case R_PPC_ADDR14_BRTAKEN:
3918 case R_PPC_ADDR14_BRNTAKEN:
3919 if (h != NULL && !info->shared)
3920 {
3921 /* We may need a plt entry if the symbol turns out to be
3922 a function defined in a dynamic object. */
3923 h->needs_plt = 1;
3924 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3925 return FALSE;
3926 break;
3927 }
3928
3929 dodyn:
3930 /* If we are creating a shared library, and this is a reloc
3931 against a global symbol, or a non PC relative reloc
3932 against a local symbol, then we need to copy the reloc
3933 into the shared library. However, if we are linking with
3934 -Bsymbolic, we do not need to copy a reloc against a
3935 global symbol which is defined in an object we are
3936 including in the link (i.e., DEF_REGULAR is set). At
3937 this point we have not seen all the input files, so it is
3938 possible that DEF_REGULAR is not set now but will be set
3939 later (it is never cleared). In case of a weak definition,
3940 DEF_REGULAR may be cleared later by a strong definition in
3941 a shared library. We account for that possibility below by
3942 storing information in the dyn_relocs field of the hash
3943 table entry. A similar situation occurs when creating
3944 shared libraries and symbol visibility changes render the
3945 symbol local.
3946
3947 If on the other hand, we are creating an executable, we
3948 may need to keep relocations for symbols satisfied by a
3949 dynamic library if we manage to avoid copy relocs for the
3950 symbol. */
3951 if ((info->shared
3952 && (must_be_dyn_reloc (info, r_type)
3953 || (h != NULL
3954 && (! info->symbolic
3955 || h->root.type == bfd_link_hash_defweak
3956 || !h->def_regular))))
3957 || (ELIMINATE_COPY_RELOCS
3958 && !info->shared
3959 && h != NULL
3960 && (h->root.type == bfd_link_hash_defweak
3961 || !h->def_regular)))
3962 {
3963 struct ppc_elf_dyn_relocs *p;
3964 struct ppc_elf_dyn_relocs **head;
3965
3966 #ifdef DEBUG
3967 fprintf (stderr,
3968 "ppc_elf_check_relocs needs to "
3969 "create relocation for %s\n",
3970 (h && h->root.root.string
3971 ? h->root.root.string : "<unknown>"));
3972 #endif
3973 if (sreloc == NULL)
3974 {
3975 if (htab->elf.dynobj == NULL)
3976 htab->elf.dynobj = abfd;
3977
3978 sreloc = _bfd_elf_make_dynamic_reloc_section
3979 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3980
3981 if (sreloc == NULL)
3982 return FALSE;
3983 }
3984
3985 /* If this is a global symbol, we count the number of
3986 relocations we need for this symbol. */
3987 if (h != NULL)
3988 {
3989 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3990 }
3991 else
3992 {
3993 /* Track dynamic relocs needed for local syms too.
3994 We really need local syms available to do this
3995 easily. Oh well. */
3996 asection *s;
3997 void *vpp;
3998 Elf_Internal_Sym *isym;
3999
4000 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4001 abfd, r_symndx);
4002 if (isym == NULL)
4003 return FALSE;
4004
4005 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4006 if (s == NULL)
4007 s = sec;
4008
4009 vpp = &elf_section_data (s)->local_dynrel;
4010 head = (struct ppc_elf_dyn_relocs **) vpp;
4011 }
4012
4013 p = *head;
4014 if (p == NULL || p->sec != sec)
4015 {
4016 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4017 if (p == NULL)
4018 return FALSE;
4019 p->next = *head;
4020 *head = p;
4021 p->sec = sec;
4022 p->count = 0;
4023 p->pc_count = 0;
4024 }
4025
4026 p->count += 1;
4027 if (!must_be_dyn_reloc (info, r_type))
4028 p->pc_count += 1;
4029 }
4030
4031 break;
4032 }
4033 }
4034
4035 return TRUE;
4036 }
4037 \f
4038
4039 /* Merge object attributes from IBFD into OBFD. Raise an error if
4040 there are conflicting attributes. */
4041 static bfd_boolean
4042 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4043 {
4044 obj_attribute *in_attr, *in_attrs;
4045 obj_attribute *out_attr, *out_attrs;
4046
4047 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4048 {
4049 /* This is the first object. Copy the attributes. */
4050 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4051
4052 /* Use the Tag_null value to indicate the attributes have been
4053 initialized. */
4054 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4055
4056 return TRUE;
4057 }
4058
4059 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4060 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4061
4062 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4063 non-conflicting ones. */
4064 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4065 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4066 if (in_attr->i != out_attr->i)
4067 {
4068 out_attr->type = 1;
4069 if (out_attr->i == 0)
4070 out_attr->i = in_attr->i;
4071 else if (in_attr->i == 0)
4072 ;
4073 else if (out_attr->i == 1 && in_attr->i == 2)
4074 _bfd_error_handler
4075 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4076 else if (out_attr->i == 1 && in_attr->i == 3)
4077 _bfd_error_handler
4078 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4079 obfd, ibfd);
4080 else if (out_attr->i == 3 && in_attr->i == 1)
4081 _bfd_error_handler
4082 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4083 ibfd, obfd);
4084 else if (out_attr->i == 3 && in_attr->i == 2)
4085 _bfd_error_handler
4086 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4087 ibfd, obfd);
4088 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4089 _bfd_error_handler
4090 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4091 else if (in_attr->i > 3)
4092 _bfd_error_handler
4093 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4094 in_attr->i);
4095 else
4096 _bfd_error_handler
4097 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4098 out_attr->i);
4099 }
4100
4101 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4102 merge non-conflicting ones. */
4103 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4104 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4105 if (in_attr->i != out_attr->i)
4106 {
4107 const char *in_abi = NULL, *out_abi = NULL;
4108
4109 switch (in_attr->i)
4110 {
4111 case 1: in_abi = "generic"; break;
4112 case 2: in_abi = "AltiVec"; break;
4113 case 3: in_abi = "SPE"; break;
4114 }
4115
4116 switch (out_attr->i)
4117 {
4118 case 1: out_abi = "generic"; break;
4119 case 2: out_abi = "AltiVec"; break;
4120 case 3: out_abi = "SPE"; break;
4121 }
4122
4123 out_attr->type = 1;
4124 if (out_attr->i == 0)
4125 out_attr->i = in_attr->i;
4126 else if (in_attr->i == 0)
4127 ;
4128 /* For now, allow generic to transition to AltiVec or SPE
4129 without a warning. If GCC marked files with their stack
4130 alignment and used don't-care markings for files which are
4131 not affected by the vector ABI, we could warn about this
4132 case too. */
4133 else if (out_attr->i == 1)
4134 out_attr->i = in_attr->i;
4135 else if (in_attr->i == 1)
4136 ;
4137 else if (in_abi == NULL)
4138 _bfd_error_handler
4139 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4140 in_attr->i);
4141 else if (out_abi == NULL)
4142 _bfd_error_handler
4143 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4144 in_attr->i);
4145 else
4146 _bfd_error_handler
4147 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4148 ibfd, obfd, in_abi, out_abi);
4149 }
4150
4151 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4152 and merge non-conflicting ones. */
4153 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4154 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4155 if (in_attr->i != out_attr->i)
4156 {
4157 out_attr->type = 1;
4158 if (out_attr->i == 0)
4159 out_attr->i = in_attr->i;
4160 else if (in_attr->i == 0)
4161 ;
4162 else if (out_attr->i == 1 && in_attr->i == 2)
4163 _bfd_error_handler
4164 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4165 else if (out_attr->i == 2 && in_attr->i == 1)
4166 _bfd_error_handler
4167 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4168 else if (in_attr->i > 2)
4169 _bfd_error_handler
4170 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4171 in_attr->i);
4172 else
4173 _bfd_error_handler
4174 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4175 out_attr->i);
4176 }
4177
4178 /* Merge Tag_compatibility attributes and any common GNU ones. */
4179 _bfd_elf_merge_object_attributes (ibfd, obfd);
4180
4181 return TRUE;
4182 }
4183
4184 /* Merge backend specific data from an object file to the output
4185 object file when linking. */
4186
4187 static bfd_boolean
4188 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4189 {
4190 flagword old_flags;
4191 flagword new_flags;
4192 bfd_boolean error;
4193
4194 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4195 return TRUE;
4196
4197 /* Check if we have the same endianess. */
4198 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4199 return FALSE;
4200
4201 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4202 return FALSE;
4203
4204 new_flags = elf_elfheader (ibfd)->e_flags;
4205 old_flags = elf_elfheader (obfd)->e_flags;
4206 if (!elf_flags_init (obfd))
4207 {
4208 /* First call, no flags set. */
4209 elf_flags_init (obfd) = TRUE;
4210 elf_elfheader (obfd)->e_flags = new_flags;
4211 }
4212
4213 /* Compatible flags are ok. */
4214 else if (new_flags == old_flags)
4215 ;
4216
4217 /* Incompatible flags. */
4218 else
4219 {
4220 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4221 to be linked with either. */
4222 error = FALSE;
4223 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4224 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4225 {
4226 error = TRUE;
4227 (*_bfd_error_handler)
4228 (_("%B: compiled with -mrelocatable and linked with "
4229 "modules compiled normally"), ibfd);
4230 }
4231 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4232 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4233 {
4234 error = TRUE;
4235 (*_bfd_error_handler)
4236 (_("%B: compiled normally and linked with "
4237 "modules compiled with -mrelocatable"), ibfd);
4238 }
4239
4240 /* The output is -mrelocatable-lib iff both the input files are. */
4241 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4242 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4243
4244 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4245 but each input file is either -mrelocatable or -mrelocatable-lib. */
4246 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4247 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4248 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4249 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4250
4251 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4252 any module uses it. */
4253 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4254
4255 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4256 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4257
4258 /* Warn about any other mismatches. */
4259 if (new_flags != old_flags)
4260 {
4261 error = TRUE;
4262 (*_bfd_error_handler)
4263 (_("%B: uses different e_flags (0x%lx) fields "
4264 "than previous modules (0x%lx)"),
4265 ibfd, (long) new_flags, (long) old_flags);
4266 }
4267
4268 if (error)
4269 {
4270 bfd_set_error (bfd_error_bad_value);
4271 return FALSE;
4272 }
4273 }
4274
4275 return TRUE;
4276 }
4277 \f
4278 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4279 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4280 int
4281 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4282 struct bfd_link_info *info,
4283 enum ppc_elf_plt_type plt_style,
4284 int emit_stub_syms)
4285 {
4286 struct ppc_elf_link_hash_table *htab;
4287 flagword flags;
4288
4289 htab = ppc_elf_hash_table (info);
4290
4291 htab->emit_stub_syms = emit_stub_syms;
4292
4293 if (htab->plt_type == PLT_UNSET)
4294 {
4295 if (plt_style == PLT_OLD)
4296 htab->plt_type = PLT_OLD;
4297 else
4298 {
4299 bfd *ibfd;
4300 enum ppc_elf_plt_type plt_type = plt_style;
4301
4302 /* Look through the reloc flags left by ppc_elf_check_relocs.
4303 Use the old style bss plt if a file makes plt calls
4304 without using the new relocs, and if ld isn't given
4305 --secure-plt and we never see REL16 relocs. */
4306 if (plt_type == PLT_UNSET)
4307 plt_type = PLT_OLD;
4308 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4309 if (is_ppc_elf (ibfd))
4310 {
4311 if (ppc_elf_tdata (ibfd)->has_rel16)
4312 plt_type = PLT_NEW;
4313 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4314 {
4315 plt_type = PLT_OLD;
4316 htab->old_bfd = ibfd;
4317 break;
4318 }
4319 }
4320 htab->plt_type = plt_type;
4321 }
4322 }
4323 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4324 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4325
4326 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4327
4328 if (htab->plt_type == PLT_NEW)
4329 {
4330 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4331 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4332
4333 /* The new PLT is a loaded section. */
4334 if (htab->plt != NULL
4335 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4336 return -1;
4337
4338 /* The new GOT is not executable. */
4339 if (htab->got != NULL
4340 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4341 return -1;
4342 }
4343 else
4344 {
4345 /* Stop an unused .glink section from affecting .text alignment. */
4346 if (htab->glink != NULL
4347 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4348 return -1;
4349 }
4350 return htab->plt_type == PLT_NEW;
4351 }
4352 \f
4353 /* Return the section that should be marked against GC for a given
4354 relocation. */
4355
4356 static asection *
4357 ppc_elf_gc_mark_hook (asection *sec,
4358 struct bfd_link_info *info,
4359 Elf_Internal_Rela *rel,
4360 struct elf_link_hash_entry *h,
4361 Elf_Internal_Sym *sym)
4362 {
4363 if (h != NULL)
4364 switch (ELF32_R_TYPE (rel->r_info))
4365 {
4366 case R_PPC_GNU_VTINHERIT:
4367 case R_PPC_GNU_VTENTRY:
4368 return NULL;
4369 }
4370
4371 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4372 }
4373
4374 /* Update the got, plt and dynamic reloc reference counts for the
4375 section being removed. */
4376
4377 static bfd_boolean
4378 ppc_elf_gc_sweep_hook (bfd *abfd,
4379 struct bfd_link_info *info,
4380 asection *sec,
4381 const Elf_Internal_Rela *relocs)
4382 {
4383 struct ppc_elf_link_hash_table *htab;
4384 Elf_Internal_Shdr *symtab_hdr;
4385 struct elf_link_hash_entry **sym_hashes;
4386 bfd_signed_vma *local_got_refcounts;
4387 const Elf_Internal_Rela *rel, *relend;
4388 asection *got2;
4389
4390 if (info->relocatable)
4391 return TRUE;
4392
4393 if ((sec->flags & SEC_ALLOC) == 0)
4394 return TRUE;
4395
4396 elf_section_data (sec)->local_dynrel = NULL;
4397
4398 htab = ppc_elf_hash_table (info);
4399 symtab_hdr = &elf_symtab_hdr (abfd);
4400 sym_hashes = elf_sym_hashes (abfd);
4401 local_got_refcounts = elf_local_got_refcounts (abfd);
4402 got2 = bfd_get_section_by_name (abfd, ".got2");
4403
4404 relend = relocs + sec->reloc_count;
4405 for (rel = relocs; rel < relend; rel++)
4406 {
4407 unsigned long r_symndx;
4408 enum elf_ppc_reloc_type r_type;
4409 struct elf_link_hash_entry *h = NULL;
4410
4411 r_symndx = ELF32_R_SYM (rel->r_info);
4412 if (r_symndx >= symtab_hdr->sh_info)
4413 {
4414 struct ppc_elf_dyn_relocs **pp, *p;
4415 struct ppc_elf_link_hash_entry *eh;
4416
4417 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4418 while (h->root.type == bfd_link_hash_indirect
4419 || h->root.type == bfd_link_hash_warning)
4420 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4421 eh = (struct ppc_elf_link_hash_entry *) h;
4422
4423 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4424 if (p->sec == sec)
4425 {
4426 /* Everything must go for SEC. */
4427 *pp = p->next;
4428 break;
4429 }
4430 }
4431
4432 r_type = ELF32_R_TYPE (rel->r_info);
4433 if (!htab->is_vxworks
4434 && h == NULL
4435 && local_got_refcounts != NULL
4436 && (!info->shared
4437 || is_branch_reloc (r_type)))
4438 {
4439 struct plt_entry **local_plt = (struct plt_entry **)
4440 (local_got_refcounts + symtab_hdr->sh_info);
4441 char *local_got_tls_masks = (char *)
4442 (local_plt + symtab_hdr->sh_info);
4443 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4444 {
4445 struct plt_entry **ifunc = local_plt + r_symndx;
4446 bfd_vma addend = 0;
4447 struct plt_entry *ent;
4448
4449 if (r_type == R_PPC_PLTREL24 && info->shared)
4450 addend = rel->r_addend;
4451 ent = find_plt_ent (ifunc, got2, addend);
4452 if (ent->plt.refcount > 0)
4453 ent->plt.refcount -= 1;
4454 continue;
4455 }
4456 }
4457
4458 switch (r_type)
4459 {
4460 case R_PPC_GOT_TLSLD16:
4461 case R_PPC_GOT_TLSLD16_LO:
4462 case R_PPC_GOT_TLSLD16_HI:
4463 case R_PPC_GOT_TLSLD16_HA:
4464 case R_PPC_GOT_TLSGD16:
4465 case R_PPC_GOT_TLSGD16_LO:
4466 case R_PPC_GOT_TLSGD16_HI:
4467 case R_PPC_GOT_TLSGD16_HA:
4468 case R_PPC_GOT_TPREL16:
4469 case R_PPC_GOT_TPREL16_LO:
4470 case R_PPC_GOT_TPREL16_HI:
4471 case R_PPC_GOT_TPREL16_HA:
4472 case R_PPC_GOT_DTPREL16:
4473 case R_PPC_GOT_DTPREL16_LO:
4474 case R_PPC_GOT_DTPREL16_HI:
4475 case R_PPC_GOT_DTPREL16_HA:
4476 case R_PPC_GOT16:
4477 case R_PPC_GOT16_LO:
4478 case R_PPC_GOT16_HI:
4479 case R_PPC_GOT16_HA:
4480 if (h != NULL)
4481 {
4482 if (h->got.refcount > 0)
4483 h->got.refcount--;
4484 if (!info->shared)
4485 {
4486 struct plt_entry *ent;
4487
4488 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4489 if (ent->plt.refcount > 0)
4490 ent->plt.refcount -= 1;
4491 }
4492 }
4493 else if (local_got_refcounts != NULL)
4494 {
4495 if (local_got_refcounts[r_symndx] > 0)
4496 local_got_refcounts[r_symndx]--;
4497 }
4498 break;
4499
4500 case R_PPC_REL24:
4501 case R_PPC_REL14:
4502 case R_PPC_REL14_BRTAKEN:
4503 case R_PPC_REL14_BRNTAKEN:
4504 case R_PPC_REL32:
4505 if (h == NULL || h == htab->elf.hgot)
4506 break;
4507 /* Fall thru */
4508
4509 case R_PPC_ADDR32:
4510 case R_PPC_ADDR24:
4511 case R_PPC_ADDR16:
4512 case R_PPC_ADDR16_LO:
4513 case R_PPC_ADDR16_HI:
4514 case R_PPC_ADDR16_HA:
4515 case R_PPC_ADDR14:
4516 case R_PPC_ADDR14_BRTAKEN:
4517 case R_PPC_ADDR14_BRNTAKEN:
4518 case R_PPC_UADDR32:
4519 case R_PPC_UADDR16:
4520 if (info->shared)
4521 break;
4522
4523 case R_PPC_PLT32:
4524 case R_PPC_PLTREL24:
4525 case R_PPC_PLTREL32:
4526 case R_PPC_PLT16_LO:
4527 case R_PPC_PLT16_HI:
4528 case R_PPC_PLT16_HA:
4529 if (h != NULL)
4530 {
4531 bfd_vma addend = 0;
4532 struct plt_entry *ent;
4533
4534 if (r_type == R_PPC_PLTREL24 && info->shared)
4535 addend = rel->r_addend;
4536 ent = find_plt_ent (&h->plt.plist, got2, addend);
4537 if (ent->plt.refcount > 0)
4538 ent->plt.refcount -= 1;
4539 }
4540 break;
4541
4542 default:
4543 break;
4544 }
4545 }
4546 return TRUE;
4547 }
4548 \f
4549 /* Set plt output section type, htab->tls_get_addr, and call the
4550 generic ELF tls_setup function. */
4551
4552 asection *
4553 ppc_elf_tls_setup (bfd *obfd,
4554 struct bfd_link_info *info,
4555 int no_tls_get_addr_opt)
4556 {
4557 struct ppc_elf_link_hash_table *htab;
4558
4559 htab = ppc_elf_hash_table (info);
4560 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4561 FALSE, FALSE, TRUE);
4562 if (!no_tls_get_addr_opt)
4563 {
4564 struct elf_link_hash_entry *opt, *tga;
4565 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4566 FALSE, FALSE, TRUE);
4567 if (opt != NULL
4568 && (opt->root.type == bfd_link_hash_defined
4569 || opt->root.type == bfd_link_hash_defweak))
4570 {
4571 /* If glibc supports an optimized __tls_get_addr call stub,
4572 signalled by the presence of __tls_get_addr_opt, and we'll
4573 be calling __tls_get_addr via a plt call stub, then
4574 make __tls_get_addr point to __tls_get_addr_opt. */
4575 tga = htab->tls_get_addr;
4576 if (htab->elf.dynamic_sections_created
4577 && tga != NULL
4578 && (tga->type == STT_FUNC
4579 || tga->needs_plt)
4580 && !(SYMBOL_CALLS_LOCAL (info, tga)
4581 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4582 && tga->root.type == bfd_link_hash_undefweak)))
4583 {
4584 struct plt_entry *ent;
4585 ent = find_plt_ent (&tga->plt.plist, NULL, 0);
4586 if (ent != NULL
4587 && ent->plt.refcount > 0)
4588 {
4589 tga->root.type = bfd_link_hash_indirect;
4590 tga->root.u.i.link = &opt->root;
4591 ppc_elf_copy_indirect_symbol (info, opt, tga);
4592 if (opt->dynindx != -1)
4593 {
4594 /* Use __tls_get_addr_opt in dynamic relocations. */
4595 opt->dynindx = -1;
4596 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4597 opt->dynstr_index);
4598 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4599 return FALSE;
4600 }
4601 htab->tls_get_addr = opt;
4602 }
4603 }
4604 }
4605 else
4606 no_tls_get_addr_opt = TRUE;
4607 }
4608 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4609 if (htab->plt_type == PLT_NEW
4610 && htab->plt != NULL
4611 && htab->plt->output_section != NULL)
4612 {
4613 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4614 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4615 }
4616
4617 return _bfd_elf_tls_setup (obfd, info);
4618 }
4619
4620 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4621 HASH. */
4622
4623 static bfd_boolean
4624 branch_reloc_hash_match (const bfd *ibfd,
4625 const Elf_Internal_Rela *rel,
4626 const struct elf_link_hash_entry *hash)
4627 {
4628 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4629 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4630 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4631
4632 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4633 {
4634 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4635 struct elf_link_hash_entry *h;
4636
4637 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4638 while (h->root.type == bfd_link_hash_indirect
4639 || h->root.type == bfd_link_hash_warning)
4640 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4641 if (h == hash)
4642 return TRUE;
4643 }
4644 return FALSE;
4645 }
4646
4647 /* Run through all the TLS relocs looking for optimization
4648 opportunities. */
4649
4650 bfd_boolean
4651 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4652 struct bfd_link_info *info)
4653 {
4654 bfd *ibfd;
4655 asection *sec;
4656 struct ppc_elf_link_hash_table *htab;
4657 int pass;
4658
4659 if (info->relocatable || !info->executable)
4660 return TRUE;
4661
4662 htab = ppc_elf_hash_table (info);
4663 /* Make two passes through the relocs. First time check that tls
4664 relocs involved in setting up a tls_get_addr call are indeed
4665 followed by such a call. If they are not, exclude them from
4666 the optimizations done on the second pass. */
4667 for (pass = 0; pass < 2; ++pass)
4668 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4669 {
4670 Elf_Internal_Sym *locsyms = NULL;
4671 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4672
4673 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4674 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4675 {
4676 Elf_Internal_Rela *relstart, *rel, *relend;
4677
4678 /* Read the relocations. */
4679 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4680 info->keep_memory);
4681 if (relstart == NULL)
4682 return FALSE;
4683
4684 relend = relstart + sec->reloc_count;
4685 for (rel = relstart; rel < relend; rel++)
4686 {
4687 enum elf_ppc_reloc_type r_type;
4688 unsigned long r_symndx;
4689 struct elf_link_hash_entry *h = NULL;
4690 char *tls_mask;
4691 char tls_set, tls_clear;
4692 bfd_boolean is_local;
4693 int expecting_tls_get_addr;
4694 bfd_signed_vma *got_count;
4695
4696 r_symndx = ELF32_R_SYM (rel->r_info);
4697 if (r_symndx >= symtab_hdr->sh_info)
4698 {
4699 struct elf_link_hash_entry **sym_hashes;
4700
4701 sym_hashes = elf_sym_hashes (ibfd);
4702 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4703 while (h->root.type == bfd_link_hash_indirect
4704 || h->root.type == bfd_link_hash_warning)
4705 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4706 }
4707
4708 expecting_tls_get_addr = 0;
4709 is_local = FALSE;
4710 if (h == NULL
4711 || !h->def_dynamic)
4712 is_local = TRUE;
4713
4714 r_type = ELF32_R_TYPE (rel->r_info);
4715 switch (r_type)
4716 {
4717 case R_PPC_GOT_TLSLD16:
4718 case R_PPC_GOT_TLSLD16_LO:
4719 expecting_tls_get_addr = 1;
4720 /* Fall thru */
4721
4722 case R_PPC_GOT_TLSLD16_HI:
4723 case R_PPC_GOT_TLSLD16_HA:
4724 /* These relocs should never be against a symbol
4725 defined in a shared lib. Leave them alone if
4726 that turns out to be the case. */
4727 if (!is_local)
4728 continue;
4729
4730 /* LD -> LE */
4731 tls_set = 0;
4732 tls_clear = TLS_LD;
4733 break;
4734
4735 case R_PPC_GOT_TLSGD16:
4736 case R_PPC_GOT_TLSGD16_LO:
4737 expecting_tls_get_addr = 1;
4738 /* Fall thru */
4739
4740 case R_PPC_GOT_TLSGD16_HI:
4741 case R_PPC_GOT_TLSGD16_HA:
4742 if (is_local)
4743 /* GD -> LE */
4744 tls_set = 0;
4745 else
4746 /* GD -> IE */
4747 tls_set = TLS_TLS | TLS_TPRELGD;
4748 tls_clear = TLS_GD;
4749 break;
4750
4751 case R_PPC_GOT_TPREL16:
4752 case R_PPC_GOT_TPREL16_LO:
4753 case R_PPC_GOT_TPREL16_HI:
4754 case R_PPC_GOT_TPREL16_HA:
4755 if (is_local)
4756 {
4757 /* IE -> LE */
4758 tls_set = 0;
4759 tls_clear = TLS_TPREL;
4760 break;
4761 }
4762 else
4763 continue;
4764
4765 default:
4766 continue;
4767 }
4768
4769 if (pass == 0)
4770 {
4771 if (!expecting_tls_get_addr
4772 || !sec->has_tls_get_addr_call)
4773 continue;
4774
4775 if (rel + 1 < relend
4776 && branch_reloc_hash_match (ibfd, rel + 1,
4777 htab->tls_get_addr))
4778 continue;
4779
4780 /* Uh oh, we didn't find the expected call. We
4781 could just mark this symbol to exclude it
4782 from tls optimization but it's safer to skip
4783 the entire section. */
4784 sec->has_tls_reloc = 0;
4785 break;
4786 }
4787
4788 if (h != NULL)
4789 {
4790 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4791 got_count = &h->got.refcount;
4792 }
4793 else
4794 {
4795 Elf_Internal_Sym *sym;
4796 bfd_signed_vma *lgot_refs;
4797 struct plt_entry **local_plt;
4798 char *lgot_masks;
4799
4800 if (locsyms == NULL)
4801 {
4802 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4803 if (locsyms == NULL)
4804 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4805 symtab_hdr->sh_info,
4806 0, NULL, NULL, NULL);
4807 if (locsyms == NULL)
4808 {
4809 if (elf_section_data (sec)->relocs != relstart)
4810 free (relstart);
4811 return FALSE;
4812 }
4813 }
4814 sym = locsyms + r_symndx;
4815 lgot_refs = elf_local_got_refcounts (ibfd);
4816 if (lgot_refs == NULL)
4817 abort ();
4818 local_plt = (struct plt_entry **)
4819 (lgot_refs + symtab_hdr->sh_info);
4820 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4821 tls_mask = &lgot_masks[r_symndx];
4822 got_count = &lgot_refs[r_symndx];
4823 }
4824
4825 if (tls_set == 0)
4826 {
4827 /* We managed to get rid of a got entry. */
4828 if (*got_count > 0)
4829 *got_count -= 1;
4830 }
4831
4832 if (expecting_tls_get_addr)
4833 {
4834 struct plt_entry *ent;
4835
4836 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4837 NULL, 0);
4838 if (ent != NULL && ent->plt.refcount > 0)
4839 ent->plt.refcount -= 1;
4840 }
4841
4842 *tls_mask |= tls_set;
4843 *tls_mask &= ~tls_clear;
4844 }
4845
4846 if (elf_section_data (sec)->relocs != relstart)
4847 free (relstart);
4848 }
4849
4850 if (locsyms != NULL
4851 && (symtab_hdr->contents != (unsigned char *) locsyms))
4852 {
4853 if (!info->keep_memory)
4854 free (locsyms);
4855 else
4856 symtab_hdr->contents = (unsigned char *) locsyms;
4857 }
4858 }
4859 return TRUE;
4860 }
4861 \f
4862 /* Return true if we have dynamic relocs that apply to read-only sections. */
4863
4864 static bfd_boolean
4865 readonly_dynrelocs (struct elf_link_hash_entry *h)
4866 {
4867 struct ppc_elf_dyn_relocs *p;
4868
4869 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4870 {
4871 asection *s = p->sec->output_section;
4872
4873 if (s != NULL
4874 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4875 == (SEC_READONLY | SEC_ALLOC)))
4876 return TRUE;
4877 }
4878 return FALSE;
4879 }
4880
4881 /* Adjust a symbol defined by a dynamic object and referenced by a
4882 regular object. The current definition is in some section of the
4883 dynamic object, but we're not including those sections. We have to
4884 change the definition to something the rest of the link can
4885 understand. */
4886
4887 static bfd_boolean
4888 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4889 struct elf_link_hash_entry *h)
4890 {
4891 struct ppc_elf_link_hash_table *htab;
4892 asection *s;
4893
4894 #ifdef DEBUG
4895 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4896 h->root.root.string);
4897 #endif
4898
4899 /* Make sure we know what is going on here. */
4900 htab = ppc_elf_hash_table (info);
4901 BFD_ASSERT (htab->elf.dynobj != NULL
4902 && (h->needs_plt
4903 || h->type == STT_GNU_IFUNC
4904 || h->u.weakdef != NULL
4905 || (h->def_dynamic
4906 && h->ref_regular
4907 && !h->def_regular)));
4908
4909 /* Deal with function syms. */
4910 if (h->type == STT_FUNC
4911 || h->type == STT_GNU_IFUNC
4912 || h->needs_plt)
4913 {
4914 /* Clear procedure linkage table information for any symbol that
4915 won't need a .plt entry. */
4916 struct plt_entry *ent;
4917 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4918 if (ent->plt.refcount > 0)
4919 break;
4920 if (ent == NULL
4921 || (h->type != STT_GNU_IFUNC
4922 && (SYMBOL_CALLS_LOCAL (info, h)
4923 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4924 && h->root.type == bfd_link_hash_undefweak))))
4925 {
4926 /* A PLT entry is not required/allowed when:
4927
4928 1. We are not using ld.so; because then the PLT entry
4929 can't be set up, so we can't use one. In this case,
4930 ppc_elf_adjust_dynamic_symbol won't even be called.
4931
4932 2. GC has rendered the entry unused.
4933
4934 3. We know for certain that a call to this symbol
4935 will go to this object, or will remain undefined. */
4936 h->plt.plist = NULL;
4937 h->needs_plt = 0;
4938 }
4939 else
4940 {
4941 /* After adjust_dynamic_symbol, non_got_ref set in the
4942 non-shared case means that we have allocated space in
4943 .dynbss for the symbol and thus dyn_relocs for this
4944 symbol should be discarded.
4945 If we get here we know we are making a PLT entry for this
4946 symbol, and in an executable we'd normally resolve
4947 relocations against this symbol to the PLT entry. Allow
4948 dynamic relocs if the reference is weak, and the dynamic
4949 relocs will not cause text relocation. */
4950 if (!h->ref_regular_nonweak
4951 && h->non_got_ref
4952 && h->type != STT_GNU_IFUNC
4953 && !htab->is_vxworks
4954 && !ppc_elf_hash_entry (h)->has_sda_refs
4955 && !readonly_dynrelocs (h))
4956 h->non_got_ref = 0;
4957 }
4958 return TRUE;
4959 }
4960 else
4961 h->plt.plist = NULL;
4962
4963 /* If this is a weak symbol, and there is a real definition, the
4964 processor independent code will have arranged for us to see the
4965 real definition first, and we can just use the same value. */
4966 if (h->u.weakdef != NULL)
4967 {
4968 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4969 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4970 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4971 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4972 if (ELIMINATE_COPY_RELOCS)
4973 h->non_got_ref = h->u.weakdef->non_got_ref;
4974 return TRUE;
4975 }
4976
4977 /* This is a reference to a symbol defined by a dynamic object which
4978 is not a function. */
4979
4980 /* If we are creating a shared library, we must presume that the
4981 only references to the symbol are via the global offset table.
4982 For such cases we need not do anything here; the relocations will
4983 be handled correctly by relocate_section. */
4984 if (info->shared)
4985 return TRUE;
4986
4987 /* If there are no references to this symbol that do not use the
4988 GOT, we don't need to generate a copy reloc. */
4989 if (!h->non_got_ref)
4990 return TRUE;
4991
4992 /* If we didn't find any dynamic relocs in read-only sections, then
4993 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4994 We can't do this if there are any small data relocations. This
4995 doesn't work on VxWorks, where we can not have dynamic
4996 relocations (other than copy and jump slot relocations) in an
4997 executable. */
4998 if (ELIMINATE_COPY_RELOCS
4999 && !ppc_elf_hash_entry (h)->has_sda_refs
5000 && !htab->is_vxworks
5001 && !h->def_regular
5002 && !readonly_dynrelocs (h))
5003 {
5004 h->non_got_ref = 0;
5005 return TRUE;
5006 }
5007
5008 if (h->size == 0)
5009 {
5010 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5011 h->root.root.string);
5012 return TRUE;
5013 }
5014
5015 /* We must allocate the symbol in our .dynbss section, which will
5016 become part of the .bss section of the executable. There will be
5017 an entry for this symbol in the .dynsym section. The dynamic
5018 object will contain position independent code, so all references
5019 from the dynamic object to this symbol will go through the global
5020 offset table. The dynamic linker will use the .dynsym entry to
5021 determine the address it must put in the global offset table, so
5022 both the dynamic object and the regular object will refer to the
5023 same memory location for the variable.
5024
5025 Of course, if the symbol is referenced using SDAREL relocs, we
5026 must instead allocate it in .sbss. */
5027
5028 if (ppc_elf_hash_entry (h)->has_sda_refs)
5029 s = htab->dynsbss;
5030 else
5031 s = htab->dynbss;
5032 BFD_ASSERT (s != NULL);
5033
5034 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5035 copy the initial value out of the dynamic object and into the
5036 runtime process image. We need to remember the offset into the
5037 .rela.bss section we are going to use. */
5038 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5039 {
5040 asection *srel;
5041
5042 if (ppc_elf_hash_entry (h)->has_sda_refs)
5043 srel = htab->relsbss;
5044 else
5045 srel = htab->relbss;
5046 BFD_ASSERT (srel != NULL);
5047 srel->size += sizeof (Elf32_External_Rela);
5048 h->needs_copy = 1;
5049 }
5050
5051 return _bfd_elf_adjust_dynamic_copy (h, s);
5052 }
5053 \f
5054 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5055 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5056 specifying the addend on the plt relocation. For -fpic code, the sym
5057 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5058 xxxxxxxx.got2.plt_pic32.<callee>. */
5059
5060 static bfd_boolean
5061 add_stub_sym (struct plt_entry *ent,
5062 struct elf_link_hash_entry *h,
5063 struct bfd_link_info *info)
5064 {
5065 struct elf_link_hash_entry *sh;
5066 size_t len1, len2, len3;
5067 char *name;
5068 const char *stub;
5069 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5070
5071 if (info->shared)
5072 stub = ".plt_pic32.";
5073 else
5074 stub = ".plt_call32.";
5075
5076 len1 = strlen (h->root.root.string);
5077 len2 = strlen (stub);
5078 len3 = 0;
5079 if (ent->sec)
5080 len3 = strlen (ent->sec->name);
5081 name = bfd_malloc (len1 + len2 + len3 + 9);
5082 if (name == NULL)
5083 return FALSE;
5084 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5085 if (ent->sec)
5086 memcpy (name + 8, ent->sec->name, len3);
5087 memcpy (name + 8 + len3, stub, len2);
5088 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5089 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5090 if (sh == NULL)
5091 return FALSE;
5092 if (sh->root.type == bfd_link_hash_new)
5093 {
5094 sh->root.type = bfd_link_hash_defined;
5095 sh->root.u.def.section = htab->glink;
5096 sh->root.u.def.value = ent->glink_offset;
5097 sh->ref_regular = 1;
5098 sh->def_regular = 1;
5099 sh->ref_regular_nonweak = 1;
5100 sh->forced_local = 1;
5101 sh->non_elf = 0;
5102 }
5103 return TRUE;
5104 }
5105
5106 /* Allocate NEED contiguous space in .got, and return the offset.
5107 Handles allocation of the got header when crossing 32k. */
5108
5109 static bfd_vma
5110 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5111 {
5112 bfd_vma where;
5113 unsigned int max_before_header;
5114
5115 if (htab->plt_type == PLT_VXWORKS)
5116 {
5117 where = htab->got->size;
5118 htab->got->size += need;
5119 }
5120 else
5121 {
5122 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5123 if (need <= htab->got_gap)
5124 {
5125 where = max_before_header - htab->got_gap;
5126 htab->got_gap -= need;
5127 }
5128 else
5129 {
5130 if (htab->got->size + need > max_before_header
5131 && htab->got->size <= max_before_header)
5132 {
5133 htab->got_gap = max_before_header - htab->got->size;
5134 htab->got->size = max_before_header + htab->got_header_size;
5135 }
5136 where = htab->got->size;
5137 htab->got->size += need;
5138 }
5139 }
5140 return where;
5141 }
5142
5143 /* Allocate space in associated reloc sections for dynamic relocs. */
5144
5145 static bfd_boolean
5146 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5147 {
5148 struct bfd_link_info *info = inf;
5149 struct ppc_elf_link_hash_entry *eh;
5150 struct ppc_elf_link_hash_table *htab;
5151 struct ppc_elf_dyn_relocs *p;
5152
5153 if (h->root.type == bfd_link_hash_indirect)
5154 return TRUE;
5155
5156 if (h->root.type == bfd_link_hash_warning)
5157 /* When warning symbols are created, they **replace** the "real"
5158 entry in the hash table, thus we never get to see the real
5159 symbol in a hash traversal. So look at it now. */
5160 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5161
5162 htab = ppc_elf_hash_table (info);
5163 if (htab->elf.dynamic_sections_created
5164 || h->type == STT_GNU_IFUNC)
5165 {
5166 struct plt_entry *ent;
5167 bfd_boolean doneone = FALSE;
5168 bfd_vma plt_offset = 0, glink_offset = 0;
5169 bfd_boolean dyn;
5170
5171 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5172 if (ent->plt.refcount > 0)
5173 {
5174 /* Make sure this symbol is output as a dynamic symbol. */
5175 if (h->dynindx == -1
5176 && !h->forced_local
5177 && !h->def_regular
5178 && htab->elf.dynamic_sections_created)
5179 {
5180 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5181 return FALSE;
5182 }
5183
5184 dyn = htab->elf.dynamic_sections_created;
5185 if (info->shared
5186 || h->type == STT_GNU_IFUNC
5187 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5188 {
5189 asection *s = htab->plt;
5190 if (!dyn || h->dynindx == -1)
5191 s = htab->iplt;
5192
5193 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5194 {
5195 if (!doneone)
5196 {
5197 plt_offset = s->size;
5198 s->size += 4;
5199 }
5200 ent->plt.offset = plt_offset;
5201
5202 s = htab->glink;
5203 if (!doneone || info->shared)
5204 {
5205 glink_offset = s->size;
5206 s->size += GLINK_ENTRY_SIZE;
5207 if (h == htab->tls_get_addr
5208 && !htab->no_tls_get_addr_opt)
5209 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5210 }
5211 if (!doneone
5212 && !info->shared
5213 && h->def_dynamic
5214 && !h->def_regular)
5215 {
5216 h->root.u.def.section = s;
5217 h->root.u.def.value = glink_offset;
5218 }
5219 ent->glink_offset = glink_offset;
5220
5221 if (htab->emit_stub_syms
5222 && !add_stub_sym (ent, h, info))
5223 return FALSE;
5224 }
5225 else
5226 {
5227 if (!doneone)
5228 {
5229 /* If this is the first .plt entry, make room
5230 for the special first entry. */
5231 if (s->size == 0)
5232 s->size += htab->plt_initial_entry_size;
5233
5234 /* The PowerPC PLT is actually composed of two
5235 parts, the first part is 2 words (for a load
5236 and a jump), and then there is a remaining
5237 word available at the end. */
5238 plt_offset = (htab->plt_initial_entry_size
5239 + (htab->plt_slot_size
5240 * ((s->size
5241 - htab->plt_initial_entry_size)
5242 / htab->plt_entry_size)));
5243
5244 /* If this symbol is not defined in a regular
5245 file, and we are not generating a shared
5246 library, then set the symbol to this location
5247 in the .plt. This is to avoid text
5248 relocations, and is required to make
5249 function pointers compare as equal between
5250 the normal executable and the shared library. */
5251 if (! info->shared
5252 && h->def_dynamic
5253 && !h->def_regular)
5254 {
5255 h->root.u.def.section = s;
5256 h->root.u.def.value = plt_offset;
5257 }
5258
5259 /* Make room for this entry. */
5260 s->size += htab->plt_entry_size;
5261 /* After the 8192nd entry, room for two entries
5262 is allocated. */
5263 if (htab->plt_type == PLT_OLD
5264 && (s->size - htab->plt_initial_entry_size)
5265 / htab->plt_entry_size
5266 > PLT_NUM_SINGLE_ENTRIES)
5267 s->size += htab->plt_entry_size;
5268 }
5269 ent->plt.offset = plt_offset;
5270 }
5271
5272 /* We also need to make an entry in the .rela.plt section. */
5273 if (!doneone)
5274 {
5275 if (!htab->elf.dynamic_sections_created
5276 || h->dynindx == -1)
5277 htab->reliplt->size += sizeof (Elf32_External_Rela);
5278 else
5279 {
5280 htab->relplt->size += sizeof (Elf32_External_Rela);
5281
5282 if (htab->plt_type == PLT_VXWORKS)
5283 {
5284 /* Allocate space for the unloaded relocations. */
5285 if (!info->shared
5286 && htab->elf.dynamic_sections_created)
5287 {
5288 if (ent->plt.offset
5289 == (bfd_vma) htab->plt_initial_entry_size)
5290 {
5291 htab->srelplt2->size
5292 += (sizeof (Elf32_External_Rela)
5293 * VXWORKS_PLTRESOLVE_RELOCS);
5294 }
5295
5296 htab->srelplt2->size
5297 += (sizeof (Elf32_External_Rela)
5298 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5299 }
5300
5301 /* Every PLT entry has an associated GOT entry in
5302 .got.plt. */
5303 htab->sgotplt->size += 4;
5304 }
5305 }
5306 doneone = TRUE;
5307 }
5308 }
5309 else
5310 ent->plt.offset = (bfd_vma) -1;
5311 }
5312 else
5313 ent->plt.offset = (bfd_vma) -1;
5314
5315 if (!doneone)
5316 {
5317 h->plt.plist = NULL;
5318 h->needs_plt = 0;
5319 }
5320 }
5321 else
5322 {
5323 h->plt.plist = NULL;
5324 h->needs_plt = 0;
5325 }
5326
5327 eh = (struct ppc_elf_link_hash_entry *) h;
5328 if (eh->elf.got.refcount > 0)
5329 {
5330 bfd_boolean dyn;
5331 unsigned int need;
5332
5333 /* Make sure this symbol is output as a dynamic symbol. */
5334 if (eh->elf.dynindx == -1
5335 && !eh->elf.forced_local
5336 && eh->elf.type != STT_GNU_IFUNC
5337 && htab->elf.dynamic_sections_created)
5338 {
5339 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5340 return FALSE;
5341 }
5342
5343 need = 0;
5344 if ((eh->tls_mask & TLS_TLS) != 0)
5345 {
5346 if ((eh->tls_mask & TLS_LD) != 0)
5347 {
5348 if (!eh->elf.def_dynamic)
5349 /* We'll just use htab->tlsld_got.offset. This should
5350 always be the case. It's a little odd if we have
5351 a local dynamic reloc against a non-local symbol. */
5352 htab->tlsld_got.refcount += 1;
5353 else
5354 need += 8;
5355 }
5356 if ((eh->tls_mask & TLS_GD) != 0)
5357 need += 8;
5358 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5359 need += 4;
5360 if ((eh->tls_mask & TLS_DTPREL) != 0)
5361 need += 4;
5362 }
5363 else
5364 need += 4;
5365 if (need == 0)
5366 eh->elf.got.offset = (bfd_vma) -1;
5367 else
5368 {
5369 eh->elf.got.offset = allocate_got (htab, need);
5370 dyn = htab->elf.dynamic_sections_created;
5371 if ((info->shared
5372 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5373 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5374 || eh->elf.root.type != bfd_link_hash_undefweak))
5375 {
5376 asection *rsec = htab->relgot;
5377 /* All the entries we allocated need relocs.
5378 Except LD only needs one. */
5379 if ((eh->tls_mask & TLS_LD) != 0
5380 && eh->elf.def_dynamic)
5381 need -= 4;
5382 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5383 }
5384 }
5385 }
5386 else
5387 eh->elf.got.offset = (bfd_vma) -1;
5388
5389 if (eh->dyn_relocs == NULL
5390 || !htab->elf.dynamic_sections_created)
5391 return TRUE;
5392
5393 /* In the shared -Bsymbolic case, discard space allocated for
5394 dynamic pc-relative relocs against symbols which turn out to be
5395 defined in regular objects. For the normal shared case, discard
5396 space for relocs that have become local due to symbol visibility
5397 changes. */
5398
5399 if (info->shared)
5400 {
5401 /* Relocs that use pc_count are those that appear on a call insn,
5402 or certain REL relocs (see must_be_dyn_reloc) that can be
5403 generated via assembly. We want calls to protected symbols to
5404 resolve directly to the function rather than going via the plt.
5405 If people want function pointer comparisons to work as expected
5406 then they should avoid writing weird assembly. */
5407 if (SYMBOL_CALLS_LOCAL (info, h))
5408 {
5409 struct ppc_elf_dyn_relocs **pp;
5410
5411 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5412 {
5413 p->count -= p->pc_count;
5414 p->pc_count = 0;
5415 if (p->count == 0)
5416 *pp = p->next;
5417 else
5418 pp = &p->next;
5419 }
5420 }
5421
5422 if (htab->is_vxworks)
5423 {
5424 struct ppc_elf_dyn_relocs **pp;
5425
5426 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5427 {
5428 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5429 *pp = p->next;
5430 else
5431 pp = &p->next;
5432 }
5433 }
5434
5435 /* Discard relocs on undefined symbols that must be local. */
5436 if (eh->dyn_relocs != NULL
5437 && h->root.type == bfd_link_hash_undefined
5438 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5439 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5440 eh->dyn_relocs = NULL;
5441
5442 /* Also discard relocs on undefined weak syms with non-default
5443 visibility. */
5444 if (eh->dyn_relocs != NULL
5445 && h->root.type == bfd_link_hash_undefweak)
5446 {
5447 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5448 eh->dyn_relocs = NULL;
5449
5450 /* Make sure undefined weak symbols are output as a dynamic
5451 symbol in PIEs. */
5452 else if (h->dynindx == -1
5453 && !h->forced_local
5454 && !h->def_regular)
5455 {
5456 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5457 return FALSE;
5458 }
5459 }
5460 }
5461 else if (ELIMINATE_COPY_RELOCS)
5462 {
5463 /* For the non-shared case, discard space for relocs against
5464 symbols which turn out to need copy relocs or are not
5465 dynamic. */
5466
5467 if (!h->non_got_ref
5468 && !h->def_regular)
5469 {
5470 /* Make sure this symbol is output as a dynamic symbol.
5471 Undefined weak syms won't yet be marked as dynamic. */
5472 if (h->dynindx == -1
5473 && !h->forced_local)
5474 {
5475 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5476 return FALSE;
5477 }
5478
5479 /* If that succeeded, we know we'll be keeping all the
5480 relocs. */
5481 if (h->dynindx != -1)
5482 goto keep;
5483 }
5484
5485 eh->dyn_relocs = NULL;
5486
5487 keep: ;
5488 }
5489
5490 /* Finally, allocate space. */
5491 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5492 {
5493 asection *sreloc = elf_section_data (p->sec)->sreloc;
5494 if (!htab->elf.dynamic_sections_created)
5495 sreloc = htab->reliplt;
5496 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5497 }
5498
5499 return TRUE;
5500 }
5501
5502 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5503 read-only sections. */
5504
5505 static bfd_boolean
5506 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5507 {
5508 if (h->root.type == bfd_link_hash_indirect)
5509 return TRUE;
5510
5511 if (h->root.type == bfd_link_hash_warning)
5512 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5513
5514 if (readonly_dynrelocs (h))
5515 {
5516 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5517
5518 /* Not an error, just cut short the traversal. */
5519 return FALSE;
5520 }
5521 return TRUE;
5522 }
5523
5524 /* Set the sizes of the dynamic sections. */
5525
5526 static bfd_boolean
5527 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5528 struct bfd_link_info *info)
5529 {
5530 struct ppc_elf_link_hash_table *htab;
5531 asection *s;
5532 bfd_boolean relocs;
5533 bfd *ibfd;
5534
5535 #ifdef DEBUG
5536 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5537 #endif
5538
5539 htab = ppc_elf_hash_table (info);
5540 BFD_ASSERT (htab->elf.dynobj != NULL);
5541
5542 if (elf_hash_table (info)->dynamic_sections_created)
5543 {
5544 /* Set the contents of the .interp section to the interpreter. */
5545 if (info->executable)
5546 {
5547 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5548 BFD_ASSERT (s != NULL);
5549 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5550 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5551 }
5552 }
5553
5554 if (htab->plt_type == PLT_OLD)
5555 htab->got_header_size = 16;
5556 else if (htab->plt_type == PLT_NEW)
5557 htab->got_header_size = 12;
5558
5559 /* Set up .got offsets for local syms, and space for local dynamic
5560 relocs. */
5561 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5562 {
5563 bfd_signed_vma *local_got;
5564 bfd_signed_vma *end_local_got;
5565 struct plt_entry **local_plt;
5566 struct plt_entry **end_local_plt;
5567 char *lgot_masks;
5568 bfd_size_type locsymcount;
5569 Elf_Internal_Shdr *symtab_hdr;
5570
5571 if (!is_ppc_elf (ibfd))
5572 continue;
5573
5574 for (s = ibfd->sections; s != NULL; s = s->next)
5575 {
5576 struct ppc_elf_dyn_relocs *p;
5577
5578 for (p = ((struct ppc_elf_dyn_relocs *)
5579 elf_section_data (s)->local_dynrel);
5580 p != NULL;
5581 p = p->next)
5582 {
5583 if (!bfd_is_abs_section (p->sec)
5584 && bfd_is_abs_section (p->sec->output_section))
5585 {
5586 /* Input section has been discarded, either because
5587 it is a copy of a linkonce section or due to
5588 linker script /DISCARD/, so we'll be discarding
5589 the relocs too. */
5590 }
5591 else if (htab->is_vxworks
5592 && strcmp (p->sec->output_section->name,
5593 ".tls_vars") == 0)
5594 {
5595 /* Relocations in vxworks .tls_vars sections are
5596 handled specially by the loader. */
5597 }
5598 else if (p->count != 0)
5599 {
5600 asection *sreloc = elf_section_data (p->sec)->sreloc;
5601 if (!htab->elf.dynamic_sections_created)
5602 sreloc = htab->reliplt;
5603 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5604 if ((p->sec->output_section->flags
5605 & (SEC_READONLY | SEC_ALLOC))
5606 == (SEC_READONLY | SEC_ALLOC))
5607 info->flags |= DF_TEXTREL;
5608 }
5609 }
5610 }
5611
5612 local_got = elf_local_got_refcounts (ibfd);
5613 if (!local_got)
5614 continue;
5615
5616 symtab_hdr = &elf_symtab_hdr (ibfd);
5617 locsymcount = symtab_hdr->sh_info;
5618 end_local_got = local_got + locsymcount;
5619 local_plt = (struct plt_entry **) end_local_got;
5620 end_local_plt = local_plt + locsymcount;
5621 lgot_masks = (char *) end_local_plt;
5622 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5623 if (*local_got > 0)
5624 {
5625 unsigned int need = 0;
5626 if ((*lgot_masks & TLS_TLS) != 0)
5627 {
5628 if ((*lgot_masks & TLS_GD) != 0)
5629 need += 8;
5630 if ((*lgot_masks & TLS_LD) != 0)
5631 htab->tlsld_got.refcount += 1;
5632 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5633 need += 4;
5634 if ((*lgot_masks & TLS_DTPREL) != 0)
5635 need += 4;
5636 }
5637 else
5638 need += 4;
5639 if (need == 0)
5640 *local_got = (bfd_vma) -1;
5641 else
5642 {
5643 *local_got = allocate_got (htab, need);
5644 if (info->shared)
5645 htab->relgot->size += (need
5646 * (sizeof (Elf32_External_Rela) / 4));
5647 }
5648 }
5649 else
5650 *local_got = (bfd_vma) -1;
5651
5652 if (htab->is_vxworks)
5653 continue;
5654
5655 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5656 for (; local_plt < end_local_plt; ++local_plt)
5657 {
5658 struct plt_entry *ent;
5659 bfd_boolean doneone = FALSE;
5660 bfd_vma plt_offset = 0, glink_offset = 0;
5661
5662 for (ent = *local_plt; ent != NULL; ent = ent->next)
5663 if (ent->plt.refcount > 0)
5664 {
5665 asection *s = htab->iplt;
5666
5667 if (!doneone)
5668 {
5669 plt_offset = s->size;
5670 s->size += 4;
5671 }
5672 ent->plt.offset = plt_offset;
5673
5674 s = htab->glink;
5675 if (!doneone || info->shared)
5676 {
5677 glink_offset = s->size;
5678 s->size += GLINK_ENTRY_SIZE;
5679 }
5680 ent->glink_offset = glink_offset;
5681
5682 if (!doneone)
5683 {
5684 htab->reliplt->size += sizeof (Elf32_External_Rela);
5685 doneone = TRUE;
5686 }
5687 }
5688 else
5689 ent->plt.offset = (bfd_vma) -1;
5690 }
5691 }
5692
5693 /* Allocate space for global sym dynamic relocs. */
5694 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5695
5696 if (htab->tlsld_got.refcount > 0)
5697 {
5698 htab->tlsld_got.offset = allocate_got (htab, 8);
5699 if (info->shared)
5700 htab->relgot->size += sizeof (Elf32_External_Rela);
5701 }
5702 else
5703 htab->tlsld_got.offset = (bfd_vma) -1;
5704
5705 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5706 {
5707 unsigned int g_o_t = 32768;
5708
5709 /* If we haven't allocated the header, do so now. When we get here,
5710 for old plt/got the got size will be 0 to 32764 (not allocated),
5711 or 32780 to 65536 (header allocated). For new plt/got, the
5712 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5713 if (htab->got->size <= 32768)
5714 {
5715 g_o_t = htab->got->size;
5716 if (htab->plt_type == PLT_OLD)
5717 g_o_t += 4;
5718 htab->got->size += htab->got_header_size;
5719 }
5720
5721 htab->elf.hgot->root.u.def.value = g_o_t;
5722 }
5723 if (info->shared)
5724 {
5725 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5726 if (sda != NULL
5727 && !(sda->root.type == bfd_link_hash_defined
5728 || sda->root.type == bfd_link_hash_defweak))
5729 {
5730 sda->root.type = bfd_link_hash_defined;
5731 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5732 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5733 }
5734 }
5735
5736 if (htab->glink != NULL
5737 && htab->glink->size != 0
5738 && htab->elf.dynamic_sections_created)
5739 {
5740 htab->glink_pltresolve = htab->glink->size;
5741 /* Space for the branch table. */
5742 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5743 /* Pad out to align the start of PLTresolve. */
5744 htab->glink->size += -htab->glink->size & 15;
5745 htab->glink->size += GLINK_PLTRESOLVE;
5746
5747 if (htab->emit_stub_syms)
5748 {
5749 struct elf_link_hash_entry *sh;
5750 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5751 TRUE, FALSE, FALSE);
5752 if (sh == NULL)
5753 return FALSE;
5754 if (sh->root.type == bfd_link_hash_new)
5755 {
5756 sh->root.type = bfd_link_hash_defined;
5757 sh->root.u.def.section = htab->glink;
5758 sh->root.u.def.value = htab->glink_pltresolve;
5759 sh->ref_regular = 1;
5760 sh->def_regular = 1;
5761 sh->ref_regular_nonweak = 1;
5762 sh->forced_local = 1;
5763 sh->non_elf = 0;
5764 }
5765 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5766 TRUE, FALSE, FALSE);
5767 if (sh == NULL)
5768 return FALSE;
5769 if (sh->root.type == bfd_link_hash_new)
5770 {
5771 sh->root.type = bfd_link_hash_defined;
5772 sh->root.u.def.section = htab->glink;
5773 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5774 sh->ref_regular = 1;
5775 sh->def_regular = 1;
5776 sh->ref_regular_nonweak = 1;
5777 sh->forced_local = 1;
5778 sh->non_elf = 0;
5779 }
5780 }
5781 }
5782
5783 /* We've now determined the sizes of the various dynamic sections.
5784 Allocate memory for them. */
5785 relocs = FALSE;
5786 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5787 {
5788 bfd_boolean strip_section = TRUE;
5789
5790 if ((s->flags & SEC_LINKER_CREATED) == 0)
5791 continue;
5792
5793 if (s == htab->plt
5794 || s == htab->got)
5795 {
5796 /* We'd like to strip these sections if they aren't needed, but if
5797 we've exported dynamic symbols from them we must leave them.
5798 It's too late to tell BFD to get rid of the symbols. */
5799 if (htab->elf.hplt != NULL)
5800 strip_section = FALSE;
5801 /* Strip this section if we don't need it; see the
5802 comment below. */
5803 }
5804 else if (s == htab->iplt
5805 || s == htab->glink
5806 || s == htab->sgotplt
5807 || s == htab->sbss
5808 || s == htab->dynbss
5809 || s == htab->dynsbss
5810 || s == htab->sdata[0].section
5811 || s == htab->sdata[1].section)
5812 {
5813 /* Strip these too. */
5814 }
5815 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5816 {
5817 if (s->size != 0)
5818 {
5819 /* Remember whether there are any relocation sections. */
5820 relocs = TRUE;
5821
5822 /* We use the reloc_count field as a counter if we need
5823 to copy relocs into the output file. */
5824 s->reloc_count = 0;
5825 }
5826 }
5827 else
5828 {
5829 /* It's not one of our sections, so don't allocate space. */
5830 continue;
5831 }
5832
5833 if (s->size == 0 && strip_section)
5834 {
5835 /* If we don't need this section, strip it from the
5836 output file. This is mostly to handle .rela.bss and
5837 .rela.plt. We must create both sections in
5838 create_dynamic_sections, because they must be created
5839 before the linker maps input sections to output
5840 sections. The linker does that before
5841 adjust_dynamic_symbol is called, and it is that
5842 function which decides whether anything needs to go
5843 into these sections. */
5844 s->flags |= SEC_EXCLUDE;
5845 continue;
5846 }
5847
5848 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5849 continue;
5850
5851 /* Allocate memory for the section contents. */
5852 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5853 if (s->contents == NULL)
5854 return FALSE;
5855 }
5856
5857 if (htab->elf.dynamic_sections_created)
5858 {
5859 /* Add some entries to the .dynamic section. We fill in the
5860 values later, in ppc_elf_finish_dynamic_sections, but we
5861 must add the entries now so that we get the correct size for
5862 the .dynamic section. The DT_DEBUG entry is filled in by the
5863 dynamic linker and used by the debugger. */
5864 #define add_dynamic_entry(TAG, VAL) \
5865 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5866
5867 if (info->executable)
5868 {
5869 if (!add_dynamic_entry (DT_DEBUG, 0))
5870 return FALSE;
5871 }
5872
5873 if (htab->plt != NULL && htab->plt->size != 0)
5874 {
5875 if (!add_dynamic_entry (DT_PLTGOT, 0)
5876 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5877 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5878 || !add_dynamic_entry (DT_JMPREL, 0))
5879 return FALSE;
5880 }
5881
5882 if (htab->glink != NULL && htab->glink->size != 0)
5883 {
5884 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5885 return FALSE;
5886 if (!htab->no_tls_get_addr_opt
5887 && htab->tls_get_addr != NULL
5888 && htab->tls_get_addr->plt.plist != NULL
5889 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5890 return FALSE;
5891 }
5892
5893 if (relocs)
5894 {
5895 if (!add_dynamic_entry (DT_RELA, 0)
5896 || !add_dynamic_entry (DT_RELASZ, 0)
5897 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5898 return FALSE;
5899 }
5900
5901 /* If any dynamic relocs apply to a read-only section, then we
5902 need a DT_TEXTREL entry. */
5903 if ((info->flags & DF_TEXTREL) == 0)
5904 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5905 info);
5906
5907 if ((info->flags & DF_TEXTREL) != 0)
5908 {
5909 if (!add_dynamic_entry (DT_TEXTREL, 0))
5910 return FALSE;
5911 }
5912 if (htab->is_vxworks
5913 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5914 return FALSE;
5915 }
5916 #undef add_dynamic_entry
5917
5918 return TRUE;
5919 }
5920
5921 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5922
5923 static bfd_boolean
5924 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5925 {
5926 if (h->plt.plist != NULL
5927 && !h->def_regular
5928 && (!h->pointer_equality_needed
5929 || !h->ref_regular_nonweak))
5930 return FALSE;
5931
5932 return _bfd_elf_hash_symbol (h);
5933 }
5934 \f
5935 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5936
5937 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5938 used for some functions that are allowed to break the ABI). */
5939 static const int shared_stub_entry[] =
5940 {
5941 0x7c0802a6, /* mflr 0 */
5942 0x429f0005, /* bcl 20, 31, .Lxxx */
5943 0x7d8802a6, /* mflr 12 */
5944 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5945 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5946 0x7c0803a6, /* mtlr 0 */
5947 0x7d8903a6, /* mtctr 12 */
5948 0x4e800420, /* bctr */
5949 };
5950
5951 static const int stub_entry[] =
5952 {
5953 0x3d800000, /* lis 12,xxx@ha */
5954 0x398c0000, /* addi 12,12,xxx@l */
5955 0x7d8903a6, /* mtctr 12 */
5956 0x4e800420, /* bctr */
5957 };
5958
5959 static bfd_boolean
5960 ppc_elf_relax_section (bfd *abfd,
5961 asection *isec,
5962 struct bfd_link_info *link_info,
5963 bfd_boolean *again)
5964 {
5965 struct one_fixup
5966 {
5967 struct one_fixup *next;
5968 asection *tsec;
5969 /* Final link, can use the symbol offset. For a
5970 relocatable link we use the symbol's index. */
5971 bfd_vma toff;
5972 bfd_vma trampoff;
5973 };
5974
5975 Elf_Internal_Shdr *symtab_hdr;
5976 bfd_byte *contents = NULL;
5977 Elf_Internal_Sym *isymbuf = NULL;
5978 Elf_Internal_Rela *internal_relocs = NULL;
5979 Elf_Internal_Rela *irel, *irelend;
5980 struct one_fixup *fixups = NULL;
5981 unsigned changes = 0;
5982 struct ppc_elf_link_hash_table *htab;
5983 bfd_size_type trampoff;
5984 asection *got2;
5985
5986 *again = FALSE;
5987
5988 /* Nothing to do if there are no relocations, and no need to do
5989 anything with non-alloc or non-code sections. */
5990 if ((isec->flags & SEC_ALLOC) == 0
5991 || (isec->flags & SEC_CODE) == 0
5992 || (isec->flags & SEC_RELOC) == 0
5993 || isec->reloc_count == 0)
5994 return TRUE;
5995
5996 /* We cannot represent the required PIC relocs in the output, so don't
5997 do anything. The linker doesn't support mixing -shared and -r
5998 anyway. */
5999 if (link_info->relocatable && link_info->shared)
6000 return TRUE;
6001
6002 trampoff = (isec->size + 3) & (bfd_vma) -4;
6003 /* Space for a branch around any trampolines. */
6004 trampoff += 4;
6005
6006 symtab_hdr = &elf_symtab_hdr (abfd);
6007
6008 /* Get a copy of the native relocations. */
6009 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6010 link_info->keep_memory);
6011 if (internal_relocs == NULL)
6012 goto error_return;
6013
6014 htab = ppc_elf_hash_table (link_info);
6015 got2 = bfd_get_section_by_name (abfd, ".got2");
6016
6017 irelend = internal_relocs + isec->reloc_count;
6018 for (irel = internal_relocs; irel < irelend; irel++)
6019 {
6020 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6021 bfd_vma reladdr, toff, roff;
6022 asection *tsec;
6023 struct one_fixup *f;
6024 size_t insn_offset = 0;
6025 bfd_vma max_branch_offset, val;
6026 bfd_byte *hit_addr;
6027 unsigned long t0;
6028 struct elf_link_hash_entry *h;
6029 struct plt_entry **plist;
6030 unsigned char sym_type;
6031
6032 switch (r_type)
6033 {
6034 case R_PPC_REL24:
6035 case R_PPC_LOCAL24PC:
6036 case R_PPC_PLTREL24:
6037 max_branch_offset = 1 << 25;
6038 break;
6039
6040 case R_PPC_REL14:
6041 case R_PPC_REL14_BRTAKEN:
6042 case R_PPC_REL14_BRNTAKEN:
6043 max_branch_offset = 1 << 15;
6044 break;
6045
6046 default:
6047 continue;
6048 }
6049
6050 /* Get the value of the symbol referred to by the reloc. */
6051 h = NULL;
6052 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6053 {
6054 /* A local symbol. */
6055 Elf_Internal_Sym *isym;
6056
6057 /* Read this BFD's local symbols. */
6058 if (isymbuf == NULL)
6059 {
6060 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6061 if (isymbuf == NULL)
6062 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6063 symtab_hdr->sh_info, 0,
6064 NULL, NULL, NULL);
6065 if (isymbuf == 0)
6066 goto error_return;
6067 }
6068 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6069 if (isym->st_shndx == SHN_UNDEF)
6070 tsec = bfd_und_section_ptr;
6071 else if (isym->st_shndx == SHN_ABS)
6072 tsec = bfd_abs_section_ptr;
6073 else if (isym->st_shndx == SHN_COMMON)
6074 tsec = bfd_com_section_ptr;
6075 else
6076 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6077
6078 toff = isym->st_value;
6079 sym_type = ELF_ST_TYPE (isym->st_info);
6080 }
6081 else
6082 {
6083 /* Global symbol handling. */
6084 unsigned long indx;
6085
6086 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6087 h = elf_sym_hashes (abfd)[indx];
6088
6089 while (h->root.type == bfd_link_hash_indirect
6090 || h->root.type == bfd_link_hash_warning)
6091 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6092
6093 if (h->root.type == bfd_link_hash_defined
6094 || h->root.type == bfd_link_hash_defweak)
6095 {
6096 tsec = h->root.u.def.section;
6097 toff = h->root.u.def.value;
6098 }
6099 else if (h->root.type == bfd_link_hash_undefined
6100 || h->root.type == bfd_link_hash_undefweak)
6101 {
6102 tsec = bfd_und_section_ptr;
6103 toff = link_info->relocatable ? indx : 0;
6104 }
6105 else
6106 continue;
6107
6108 sym_type = h->type;
6109 }
6110
6111 /* The condition here under which we call find_plt_ent must
6112 match that in relocate_section. If we call find_plt_ent here
6113 but not in relocate_section, or vice versa, then the branch
6114 destination used here may be incorrect. */
6115 plist = NULL;
6116 if (h != NULL)
6117 {
6118 /* We know is_branch_reloc (r_type) is true. */
6119 if (h->type == STT_GNU_IFUNC
6120 || r_type == R_PPC_PLTREL24)
6121 plist = &h->plt.plist;
6122 }
6123 else if (sym_type == STT_GNU_IFUNC
6124 && elf_local_got_offsets (abfd) != NULL)
6125 {
6126 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6127 struct plt_entry **local_plt = (struct plt_entry **)
6128 (local_got_offsets + symtab_hdr->sh_info);
6129 plist = local_plt + ELF32_R_SYM (irel->r_info);
6130 }
6131 if (plist != NULL)
6132 {
6133 bfd_vma addend = 0;
6134 struct plt_entry *ent;
6135
6136 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6137 addend = irel->r_addend;
6138 ent = find_plt_ent (plist, got2, addend);
6139 if (ent != NULL)
6140 {
6141 if (htab->plt_type == PLT_NEW
6142 || h == NULL
6143 || !htab->elf.dynamic_sections_created
6144 || h->dynindx == -1)
6145 {
6146 tsec = htab->glink;
6147 toff = ent->glink_offset;
6148 }
6149 else
6150 {
6151 tsec = htab->plt;
6152 toff = ent->plt.offset;
6153 }
6154 }
6155 }
6156
6157 /* If the branch and target are in the same section, you have
6158 no hope of adding stubs. We'll error out later should the
6159 branch overflow. */
6160 if (tsec == isec)
6161 continue;
6162
6163 /* There probably isn't any reason to handle symbols in
6164 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6165 attribute for a code section, and we are only looking at
6166 branches. However, implement it correctly here as a
6167 reference for other target relax_section functions. */
6168 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6169 {
6170 /* At this stage in linking, no SEC_MERGE symbol has been
6171 adjusted, so all references to such symbols need to be
6172 passed through _bfd_merged_section_offset. (Later, in
6173 relocate_section, all SEC_MERGE symbols *except* for
6174 section symbols have been adjusted.)
6175
6176 gas may reduce relocations against symbols in SEC_MERGE
6177 sections to a relocation against the section symbol when
6178 the original addend was zero. When the reloc is against
6179 a section symbol we should include the addend in the
6180 offset passed to _bfd_merged_section_offset, since the
6181 location of interest is the original symbol. On the
6182 other hand, an access to "sym+addend" where "sym" is not
6183 a section symbol should not include the addend; Such an
6184 access is presumed to be an offset from "sym"; The
6185 location of interest is just "sym". */
6186 if (sym_type == STT_SECTION)
6187 toff += irel->r_addend;
6188
6189 toff = _bfd_merged_section_offset (abfd, &tsec,
6190 elf_section_data (tsec)->sec_info,
6191 toff);
6192
6193 if (sym_type != STT_SECTION)
6194 toff += irel->r_addend;
6195 }
6196 /* PLTREL24 addends are special. */
6197 else if (r_type != R_PPC_PLTREL24)
6198 toff += irel->r_addend;
6199
6200 /* Attempted -shared link of non-pic code loses. */
6201 if (tsec->output_section == NULL)
6202 continue;
6203
6204 roff = irel->r_offset;
6205 reladdr = isec->output_section->vma + isec->output_offset + roff;
6206
6207 /* If the branch is in range, no need to do anything. */
6208 if (tsec != bfd_und_section_ptr
6209 && (!link_info->relocatable
6210 /* A relocatable link may have sections moved during
6211 final link, so do not presume they remain in range. */
6212 || tsec->output_section == isec->output_section))
6213 {
6214 bfd_vma symaddr, reladdr;
6215
6216 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6217 reladdr = isec->output_section->vma + isec->output_offset + roff;
6218 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6219 continue;
6220 }
6221
6222 /* Look for an existing fixup to this address. */
6223 for (f = fixups; f ; f = f->next)
6224 if (f->tsec == tsec && f->toff == toff)
6225 break;
6226
6227 if (f == NULL)
6228 {
6229 size_t size;
6230 unsigned long stub_rtype;
6231
6232 val = trampoff - roff;
6233 if (val >= max_branch_offset)
6234 /* Oh dear, we can't reach a trampoline. Don't try to add
6235 one. We'll report an error later. */
6236 continue;
6237
6238 if (link_info->shared)
6239 {
6240 size = 4 * ARRAY_SIZE (shared_stub_entry);
6241 insn_offset = 12;
6242 stub_rtype = R_PPC_RELAX32PC;
6243 }
6244 else
6245 {
6246 size = 4 * ARRAY_SIZE (stub_entry);
6247 insn_offset = 0;
6248 stub_rtype = R_PPC_RELAX32;
6249 }
6250
6251 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
6252 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
6253 abort ();
6254 if (tsec == htab->plt
6255 || tsec == htab->glink)
6256 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
6257
6258 /* Hijack the old relocation. Since we need two
6259 relocations for this use a "composite" reloc. */
6260 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6261 stub_rtype);
6262 irel->r_offset = trampoff + insn_offset;
6263 if (r_type == R_PPC_PLTREL24)
6264 irel->r_addend = 0;
6265
6266 /* Record the fixup so we don't do it again this section. */
6267 f = bfd_malloc (sizeof (*f));
6268 f->next = fixups;
6269 f->tsec = tsec;
6270 f->toff = toff;
6271 f->trampoff = trampoff;
6272 fixups = f;
6273
6274 trampoff += size;
6275 changes++;
6276 }
6277 else
6278 {
6279 val = f->trampoff - roff;
6280 if (val >= max_branch_offset)
6281 continue;
6282
6283 /* Nop out the reloc, since we're finalizing things here. */
6284 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6285 }
6286
6287 /* Get the section contents. */
6288 if (contents == NULL)
6289 {
6290 /* Get cached copy if it exists. */
6291 if (elf_section_data (isec)->this_hdr.contents != NULL)
6292 contents = elf_section_data (isec)->this_hdr.contents;
6293 else
6294 {
6295 /* Go get them off disk. */
6296 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6297 goto error_return;
6298 }
6299 }
6300
6301 /* Fix up the existing branch to hit the trampoline. */
6302 hit_addr = contents + roff;
6303 switch (r_type)
6304 {
6305 case R_PPC_REL24:
6306 case R_PPC_LOCAL24PC:
6307 case R_PPC_PLTREL24:
6308 t0 = bfd_get_32 (abfd, hit_addr);
6309 t0 &= ~0x3fffffc;
6310 t0 |= val & 0x3fffffc;
6311 bfd_put_32 (abfd, t0, hit_addr);
6312 break;
6313
6314 case R_PPC_REL14:
6315 case R_PPC_REL14_BRTAKEN:
6316 case R_PPC_REL14_BRNTAKEN:
6317 t0 = bfd_get_32 (abfd, hit_addr);
6318 t0 &= ~0xfffc;
6319 t0 |= val & 0xfffc;
6320 bfd_put_32 (abfd, t0, hit_addr);
6321 break;
6322 }
6323 }
6324
6325 /* Write out the trampolines. */
6326 if (fixups != NULL)
6327 {
6328 const int *stub;
6329 bfd_byte *dest;
6330 bfd_vma val;
6331 int i, size;
6332
6333 do
6334 {
6335 struct one_fixup *f = fixups;
6336 fixups = fixups->next;
6337 free (f);
6338 }
6339 while (fixups);
6340
6341 contents = bfd_realloc_or_free (contents, trampoff);
6342 if (contents == NULL)
6343 goto error_return;
6344
6345 isec->size = (isec->size + 3) & (bfd_vma) -4;
6346 /* Branch around the trampolines. */
6347 val = B + trampoff - isec->size;
6348 dest = contents + isec->size;
6349 isec->size = trampoff;
6350 bfd_put_32 (abfd, val, dest);
6351 dest += 4;
6352
6353 if (link_info->shared)
6354 {
6355 stub = shared_stub_entry;
6356 size = ARRAY_SIZE (shared_stub_entry);
6357 }
6358 else
6359 {
6360 stub = stub_entry;
6361 size = ARRAY_SIZE (stub_entry);
6362 }
6363
6364 i = 0;
6365 while (dest < contents + trampoff)
6366 {
6367 bfd_put_32 (abfd, stub[i], dest);
6368 i++;
6369 if (i == size)
6370 i = 0;
6371 dest += 4;
6372 }
6373 BFD_ASSERT (i == 0);
6374 }
6375
6376 if (isymbuf != NULL
6377 && symtab_hdr->contents != (unsigned char *) isymbuf)
6378 {
6379 if (! link_info->keep_memory)
6380 free (isymbuf);
6381 else
6382 {
6383 /* Cache the symbols for elf_link_input_bfd. */
6384 symtab_hdr->contents = (unsigned char *) isymbuf;
6385 }
6386 }
6387
6388 if (contents != NULL
6389 && elf_section_data (isec)->this_hdr.contents != contents)
6390 {
6391 if (!changes && !link_info->keep_memory)
6392 free (contents);
6393 else
6394 {
6395 /* Cache the section contents for elf_link_input_bfd. */
6396 elf_section_data (isec)->this_hdr.contents = contents;
6397 }
6398 }
6399
6400 if (changes != 0)
6401 {
6402 /* Append sufficient NOP relocs so we can write out relocation
6403 information for the trampolines. */
6404 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6405 * sizeof (*new_relocs));
6406 unsigned ix;
6407
6408 if (!new_relocs)
6409 goto error_return;
6410 memcpy (new_relocs, internal_relocs,
6411 isec->reloc_count * sizeof (*new_relocs));
6412 for (ix = changes; ix--;)
6413 {
6414 irel = new_relocs + ix + isec->reloc_count;
6415
6416 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6417 }
6418 if (internal_relocs != elf_section_data (isec)->relocs)
6419 free (internal_relocs);
6420 elf_section_data (isec)->relocs = new_relocs;
6421 isec->reloc_count += changes;
6422 elf_section_data (isec)->rel_hdr.sh_size
6423 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6424 }
6425 else if (elf_section_data (isec)->relocs != internal_relocs)
6426 free (internal_relocs);
6427
6428 *again = changes != 0;
6429 if (!*again && link_info->relocatable)
6430 {
6431 /* Convert the internal relax relocs to external form. */
6432 for (irel = internal_relocs; irel < irelend; irel++)
6433 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6434 {
6435 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6436
6437 /* Rewrite the reloc and convert one of the trailing nop
6438 relocs to describe this relocation. */
6439 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6440 /* The relocs are at the bottom 2 bytes */
6441 irel[0].r_offset += 2;
6442 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6443 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6444 irel[1].r_offset += 4;
6445 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6446 irel++;
6447 }
6448 }
6449
6450 return TRUE;
6451
6452 error_return:
6453 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6454 free (isymbuf);
6455 if (contents != NULL
6456 && elf_section_data (isec)->this_hdr.contents != contents)
6457 free (contents);
6458 if (internal_relocs != NULL
6459 && elf_section_data (isec)->relocs != internal_relocs)
6460 free (internal_relocs);
6461 return FALSE;
6462 }
6463 \f
6464 /* What to do when ld finds relocations against symbols defined in
6465 discarded sections. */
6466
6467 static unsigned int
6468 ppc_elf_action_discarded (asection *sec)
6469 {
6470 if (strcmp (".fixup", sec->name) == 0)
6471 return 0;
6472
6473 if (strcmp (".got2", sec->name) == 0)
6474 return 0;
6475
6476 return _bfd_elf_default_action_discarded (sec);
6477 }
6478 \f
6479 /* Fill in the address for a pointer generated in a linker section. */
6480
6481 static bfd_vma
6482 elf_finish_pointer_linker_section (bfd *input_bfd,
6483 elf_linker_section_t *lsect,
6484 struct elf_link_hash_entry *h,
6485 bfd_vma relocation,
6486 const Elf_Internal_Rela *rel)
6487 {
6488 elf_linker_section_pointers_t *linker_section_ptr;
6489
6490 BFD_ASSERT (lsect != NULL);
6491
6492 if (h != NULL)
6493 {
6494 /* Handle global symbol. */
6495 struct ppc_elf_link_hash_entry *eh;
6496
6497 eh = (struct ppc_elf_link_hash_entry *) h;
6498 BFD_ASSERT (eh->elf.def_regular);
6499 linker_section_ptr = eh->linker_section_pointer;
6500 }
6501 else
6502 {
6503 /* Handle local symbol. */
6504 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6505
6506 BFD_ASSERT (is_ppc_elf (input_bfd));
6507 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6508 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6509 }
6510
6511 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6512 rel->r_addend,
6513 lsect);
6514 BFD_ASSERT (linker_section_ptr != NULL);
6515
6516 /* Offset will always be a multiple of four, so use the bottom bit
6517 as a "written" flag. */
6518 if ((linker_section_ptr->offset & 1) == 0)
6519 {
6520 bfd_put_32 (lsect->section->owner,
6521 relocation + linker_section_ptr->addend,
6522 lsect->section->contents + linker_section_ptr->offset);
6523 linker_section_ptr->offset += 1;
6524 }
6525
6526 relocation = (lsect->section->output_section->vma
6527 + lsect->section->output_offset
6528 + linker_section_ptr->offset - 1
6529 - SYM_VAL (lsect->sym));
6530
6531 #ifdef DEBUG
6532 fprintf (stderr,
6533 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6534 lsect->name, (long) relocation, (long) relocation);
6535 #endif
6536
6537 return relocation;
6538 }
6539
6540 #define PPC_LO(v) ((v) & 0xffff)
6541 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6542 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6543
6544 static void
6545 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6546 struct bfd_link_info *info)
6547 {
6548 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6549 bfd *output_bfd = info->output_bfd;
6550 bfd_vma plt;
6551
6552 plt = ((ent->plt.offset & ~1)
6553 + plt_sec->output_section->vma
6554 + plt_sec->output_offset);
6555
6556 if (info->shared)
6557 {
6558 bfd_vma got = 0;
6559
6560 if (ent->addend >= 32768)
6561 got = (ent->addend
6562 + ent->sec->output_section->vma
6563 + ent->sec->output_offset);
6564 else if (htab->elf.hgot != NULL)
6565 got = SYM_VAL (htab->elf.hgot);
6566
6567 plt -= got;
6568
6569 if (plt + 0x8000 < 0x10000)
6570 {
6571 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6572 p += 4;
6573 bfd_put_32 (output_bfd, MTCTR_11, p);
6574 p += 4;
6575 bfd_put_32 (output_bfd, BCTR, p);
6576 p += 4;
6577 bfd_put_32 (output_bfd, NOP, p);
6578 p += 4;
6579 }
6580 else
6581 {
6582 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6583 p += 4;
6584 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6585 p += 4;
6586 bfd_put_32 (output_bfd, MTCTR_11, p);
6587 p += 4;
6588 bfd_put_32 (output_bfd, BCTR, p);
6589 p += 4;
6590 }
6591 }
6592 else
6593 {
6594 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6595 p += 4;
6596 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6597 p += 4;
6598 bfd_put_32 (output_bfd, MTCTR_11, p);
6599 p += 4;
6600 bfd_put_32 (output_bfd, BCTR, p);
6601 p += 4;
6602 }
6603 }
6604
6605 /* Return true if symbol is defined statically. */
6606
6607 static bfd_boolean
6608 is_static_defined (struct elf_link_hash_entry *h)
6609 {
6610 return ((h->root.type == bfd_link_hash_defined
6611 || h->root.type == bfd_link_hash_defweak)
6612 && h->root.u.def.section != NULL
6613 && h->root.u.def.section->output_section != NULL);
6614 }
6615
6616 /* If INSN is an opcode that may be used with an @tls operand, return
6617 the transformed insn for TLS optimisation, otherwise return 0. If
6618 REG is non-zero only match an insn with RB or RA equal to REG. */
6619
6620 unsigned int
6621 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6622 {
6623 unsigned int rtra;
6624
6625 if ((insn & (0x3f << 26)) != 31 << 26)
6626 return 0;
6627
6628 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6629 rtra = insn & ((1 << 26) - (1 << 16));
6630 else if (((insn >> 16) & 0x1f) == reg)
6631 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6632 else
6633 return 0;
6634
6635 if ((insn & (0x3ff << 1)) == 266 << 1)
6636 /* add -> addi. */
6637 insn = 14 << 26;
6638 else if ((insn & (0x1f << 1)) == 23 << 1
6639 && ((insn & (0x1f << 6)) < 14 << 6
6640 || ((insn & (0x1f << 6)) >= 16 << 6
6641 && (insn & (0x1f << 6)) < 24 << 6)))
6642 /* load and store indexed -> dform. */
6643 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6644 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6645 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6646 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6647 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6648 /* lwax -> lwa. */
6649 insn = (58 << 26) | 2;
6650 else
6651 return 0;
6652 insn |= rtra;
6653 return insn;
6654 }
6655
6656 /* The RELOCATE_SECTION function is called by the ELF backend linker
6657 to handle the relocations for a section.
6658
6659 The relocs are always passed as Rela structures; if the section
6660 actually uses Rel structures, the r_addend field will always be
6661 zero.
6662
6663 This function is responsible for adjust the section contents as
6664 necessary, and (if using Rela relocs and generating a
6665 relocatable output file) adjusting the reloc addend as
6666 necessary.
6667
6668 This function does not have to worry about setting the reloc
6669 address or the reloc symbol index.
6670
6671 LOCAL_SYMS is a pointer to the swapped in local symbols.
6672
6673 LOCAL_SECTIONS is an array giving the section in the input file
6674 corresponding to the st_shndx field of each local symbol.
6675
6676 The global hash table entry for the global symbols can be found
6677 via elf_sym_hashes (input_bfd).
6678
6679 When generating relocatable output, this function must handle
6680 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6681 going to be the section symbol corresponding to the output
6682 section, which means that the addend must be adjusted
6683 accordingly. */
6684
6685 static bfd_boolean
6686 ppc_elf_relocate_section (bfd *output_bfd,
6687 struct bfd_link_info *info,
6688 bfd *input_bfd,
6689 asection *input_section,
6690 bfd_byte *contents,
6691 Elf_Internal_Rela *relocs,
6692 Elf_Internal_Sym *local_syms,
6693 asection **local_sections)
6694 {
6695 Elf_Internal_Shdr *symtab_hdr;
6696 struct elf_link_hash_entry **sym_hashes;
6697 struct ppc_elf_link_hash_table *htab;
6698 Elf_Internal_Rela *rel;
6699 Elf_Internal_Rela *relend;
6700 Elf_Internal_Rela outrel;
6701 bfd_byte *loc;
6702 asection *got2, *sreloc = NULL;
6703 bfd_vma *local_got_offsets;
6704 bfd_boolean ret = TRUE;
6705 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6706 bfd_boolean is_vxworks_tls;
6707
6708 #ifdef DEBUG
6709 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6710 "%ld relocations%s",
6711 input_bfd, input_section,
6712 (long) input_section->reloc_count,
6713 (info->relocatable) ? " (relocatable)" : "");
6714 #endif
6715
6716 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6717
6718 /* Initialize howto table if not already done. */
6719 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6720 ppc_elf_howto_init ();
6721
6722 htab = ppc_elf_hash_table (info);
6723 local_got_offsets = elf_local_got_offsets (input_bfd);
6724 symtab_hdr = &elf_symtab_hdr (input_bfd);
6725 sym_hashes = elf_sym_hashes (input_bfd);
6726 /* We have to handle relocations in vxworks .tls_vars sections
6727 specially, because the dynamic loader is 'weird'. */
6728 is_vxworks_tls = (htab->is_vxworks && info->shared
6729 && !strcmp (input_section->output_section->name,
6730 ".tls_vars"));
6731 rel = relocs;
6732 relend = relocs + input_section->reloc_count;
6733 for (; rel < relend; rel++)
6734 {
6735 enum elf_ppc_reloc_type r_type;
6736 bfd_vma addend;
6737 bfd_reloc_status_type r;
6738 Elf_Internal_Sym *sym;
6739 asection *sec;
6740 struct elf_link_hash_entry *h;
6741 const char *sym_name;
6742 reloc_howto_type *howto;
6743 unsigned long r_symndx;
6744 bfd_vma relocation;
6745 bfd_vma branch_bit, insn, from;
6746 bfd_boolean unresolved_reloc;
6747 bfd_boolean warned;
6748 unsigned int tls_type, tls_mask, tls_gd;
6749 struct plt_entry **ifunc;
6750
6751 r_type = ELF32_R_TYPE (rel->r_info);
6752 sym = NULL;
6753 sec = NULL;
6754 h = NULL;
6755 unresolved_reloc = FALSE;
6756 warned = FALSE;
6757 r_symndx = ELF32_R_SYM (rel->r_info);
6758
6759 if (r_symndx < symtab_hdr->sh_info)
6760 {
6761 sym = local_syms + r_symndx;
6762 sec = local_sections[r_symndx];
6763 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6764
6765 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6766 }
6767 else
6768 {
6769 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6770 r_symndx, symtab_hdr, sym_hashes,
6771 h, sec, relocation,
6772 unresolved_reloc, warned);
6773
6774 sym_name = h->root.root.string;
6775 }
6776
6777 if (sec != NULL && elf_discarded_section (sec))
6778 {
6779 /* For relocs against symbols from removed linkonce sections,
6780 or sections discarded by a linker script, we just want the
6781 section contents zeroed. Avoid any special processing. */
6782 howto = NULL;
6783 if (r_type < R_PPC_max)
6784 howto = ppc_elf_howto_table[r_type];
6785 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6786 rel->r_info = 0;
6787 rel->r_addend = 0;
6788 continue;
6789 }
6790
6791 if (info->relocatable)
6792 {
6793 if (got2 != NULL
6794 && r_type == R_PPC_PLTREL24
6795 && rel->r_addend >= 32768)
6796 {
6797 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6798 addend specifies the GOT pointer offset within .got2. */
6799 rel->r_addend += got2->output_offset;
6800 }
6801 continue;
6802 }
6803
6804 /* TLS optimizations. Replace instruction sequences and relocs
6805 based on information we collected in tls_optimize. We edit
6806 RELOCS so that --emit-relocs will output something sensible
6807 for the final instruction stream. */
6808 tls_mask = 0;
6809 tls_gd = 0;
6810 if (h != NULL)
6811 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6812 else if (local_got_offsets != NULL)
6813 {
6814 struct plt_entry **local_plt;
6815 char *lgot_masks;
6816 local_plt
6817 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6818 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6819 tls_mask = lgot_masks[r_symndx];
6820 }
6821
6822 /* Ensure reloc mapping code below stays sane. */
6823 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6824 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6825 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6826 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6827 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6828 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6829 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6830 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6831 abort ();
6832 switch (r_type)
6833 {
6834 default:
6835 break;
6836
6837 case R_PPC_GOT_TPREL16:
6838 case R_PPC_GOT_TPREL16_LO:
6839 if ((tls_mask & TLS_TLS) != 0
6840 && (tls_mask & TLS_TPREL) == 0)
6841 {
6842 bfd_vma insn;
6843 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6844 insn &= 31 << 21;
6845 insn |= 0x3c020000; /* addis 0,2,0 */
6846 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6847 r_type = R_PPC_TPREL16_HA;
6848 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6849 }
6850 break;
6851
6852 case R_PPC_TLS:
6853 if ((tls_mask & TLS_TLS) != 0
6854 && (tls_mask & TLS_TPREL) == 0)
6855 {
6856 bfd_vma insn;
6857
6858 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6859 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6860 if (insn == 0)
6861 abort ();
6862 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6863 r_type = R_PPC_TPREL16_LO;
6864 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6865
6866 /* Was PPC_TLS which sits on insn boundary, now
6867 PPC_TPREL16_LO which is at low-order half-word. */
6868 rel->r_offset += d_offset;
6869 }
6870 break;
6871
6872 case R_PPC_GOT_TLSGD16_HI:
6873 case R_PPC_GOT_TLSGD16_HA:
6874 tls_gd = TLS_TPRELGD;
6875 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6876 goto tls_gdld_hi;
6877 break;
6878
6879 case R_PPC_GOT_TLSLD16_HI:
6880 case R_PPC_GOT_TLSLD16_HA:
6881 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6882 {
6883 tls_gdld_hi:
6884 if ((tls_mask & tls_gd) != 0)
6885 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6886 + R_PPC_GOT_TPREL16);
6887 else
6888 {
6889 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6890 rel->r_offset -= d_offset;
6891 r_type = R_PPC_NONE;
6892 }
6893 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6894 }
6895 break;
6896
6897 case R_PPC_GOT_TLSGD16:
6898 case R_PPC_GOT_TLSGD16_LO:
6899 tls_gd = TLS_TPRELGD;
6900 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6901 goto tls_ldgd_opt;
6902 break;
6903
6904 case R_PPC_GOT_TLSLD16:
6905 case R_PPC_GOT_TLSLD16_LO:
6906 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6907 {
6908 unsigned int insn1, insn2;
6909 bfd_vma offset;
6910
6911 tls_ldgd_opt:
6912 offset = (bfd_vma) -1;
6913 /* If not using the newer R_PPC_TLSGD/LD to mark
6914 __tls_get_addr calls, we must trust that the call
6915 stays with its arg setup insns, ie. that the next
6916 reloc is the __tls_get_addr call associated with
6917 the current reloc. Edit both insns. */
6918 if (input_section->has_tls_get_addr_call
6919 && rel + 1 < relend
6920 && branch_reloc_hash_match (input_bfd, rel + 1,
6921 htab->tls_get_addr))
6922 offset = rel[1].r_offset;
6923 if ((tls_mask & tls_gd) != 0)
6924 {
6925 /* IE */
6926 insn1 = bfd_get_32 (output_bfd,
6927 contents + rel->r_offset - d_offset);
6928 insn1 &= (1 << 26) - 1;
6929 insn1 |= 32 << 26; /* lwz */
6930 if (offset != (bfd_vma) -1)
6931 {
6932 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6933 insn2 = 0x7c631214; /* add 3,3,2 */
6934 bfd_put_32 (output_bfd, insn2, contents + offset);
6935 }
6936 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6937 + R_PPC_GOT_TPREL16);
6938 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6939 }
6940 else
6941 {
6942 /* LE */
6943 insn1 = 0x3c620000; /* addis 3,2,0 */
6944 if (tls_gd == 0)
6945 {
6946 /* Was an LD reloc. */
6947 for (r_symndx = 0;
6948 r_symndx < symtab_hdr->sh_info;
6949 r_symndx++)
6950 if (local_sections[r_symndx] == sec)
6951 break;
6952 if (r_symndx >= symtab_hdr->sh_info)
6953 r_symndx = 0;
6954 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6955 if (r_symndx != 0)
6956 rel->r_addend -= (local_syms[r_symndx].st_value
6957 + sec->output_offset
6958 + sec->output_section->vma);
6959 }
6960 r_type = R_PPC_TPREL16_HA;
6961 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6962 if (offset != (bfd_vma) -1)
6963 {
6964 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6965 rel[1].r_offset = offset + d_offset;
6966 rel[1].r_addend = rel->r_addend;
6967 insn2 = 0x38630000; /* addi 3,3,0 */
6968 bfd_put_32 (output_bfd, insn2, contents + offset);
6969 }
6970 }
6971 bfd_put_32 (output_bfd, insn1,
6972 contents + rel->r_offset - d_offset);
6973 if (tls_gd == 0)
6974 {
6975 /* We changed the symbol on an LD reloc. Start over
6976 in order to get h, sym, sec etc. right. */
6977 rel--;
6978 continue;
6979 }
6980 }
6981 break;
6982
6983 case R_PPC_TLSGD:
6984 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6985 {
6986 unsigned int insn2;
6987 bfd_vma offset = rel->r_offset;
6988
6989 if ((tls_mask & TLS_TPRELGD) != 0)
6990 {
6991 /* IE */
6992 r_type = R_PPC_NONE;
6993 insn2 = 0x7c631214; /* add 3,3,2 */
6994 }
6995 else
6996 {
6997 /* LE */
6998 r_type = R_PPC_TPREL16_LO;
6999 rel->r_offset += d_offset;
7000 insn2 = 0x38630000; /* addi 3,3,0 */
7001 }
7002 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7003 bfd_put_32 (output_bfd, insn2, contents + offset);
7004 /* Zap the reloc on the _tls_get_addr call too. */
7005 BFD_ASSERT (offset == rel[1].r_offset);
7006 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7007 }
7008 break;
7009
7010 case R_PPC_TLSLD:
7011 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7012 {
7013 unsigned int insn2;
7014
7015 for (r_symndx = 0;
7016 r_symndx < symtab_hdr->sh_info;
7017 r_symndx++)
7018 if (local_sections[r_symndx] == sec)
7019 break;
7020 if (r_symndx >= symtab_hdr->sh_info)
7021 r_symndx = 0;
7022 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7023 if (r_symndx != 0)
7024 rel->r_addend -= (local_syms[r_symndx].st_value
7025 + sec->output_offset
7026 + sec->output_section->vma);
7027
7028 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7029 rel->r_offset += d_offset;
7030 insn2 = 0x38630000; /* addi 3,3,0 */
7031 bfd_put_32 (output_bfd, insn2,
7032 contents + rel->r_offset - d_offset);
7033 /* Zap the reloc on the _tls_get_addr call too. */
7034 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7035 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7036 rel--;
7037 continue;
7038 }
7039 break;
7040 }
7041
7042 /* Handle other relocations that tweak non-addend part of insn. */
7043 branch_bit = 0;
7044 switch (r_type)
7045 {
7046 default:
7047 break;
7048
7049 /* Branch taken prediction relocations. */
7050 case R_PPC_ADDR14_BRTAKEN:
7051 case R_PPC_REL14_BRTAKEN:
7052 branch_bit = BRANCH_PREDICT_BIT;
7053 /* Fall thru */
7054
7055 /* Branch not taken prediction relocations. */
7056 case R_PPC_ADDR14_BRNTAKEN:
7057 case R_PPC_REL14_BRNTAKEN:
7058 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7059 insn &= ~BRANCH_PREDICT_BIT;
7060 insn |= branch_bit;
7061
7062 from = (rel->r_offset
7063 + input_section->output_offset
7064 + input_section->output_section->vma);
7065
7066 /* Invert 'y' bit if not the default. */
7067 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7068 insn ^= BRANCH_PREDICT_BIT;
7069
7070 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7071 break;
7072 }
7073
7074 ifunc = NULL;
7075 if (!htab->is_vxworks)
7076 {
7077 struct plt_entry *ent;
7078
7079 if (h != NULL)
7080 {
7081 if (h->type == STT_GNU_IFUNC)
7082 ifunc = &h->plt.plist;
7083 }
7084 else if (local_got_offsets != NULL
7085 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7086 {
7087 struct plt_entry **local_plt;
7088
7089 local_plt = (struct plt_entry **) (local_got_offsets
7090 + symtab_hdr->sh_info);
7091 ifunc = local_plt + r_symndx;
7092 }
7093
7094 ent = NULL;
7095 if (ifunc != NULL
7096 && (!info->shared
7097 || is_branch_reloc (r_type)))
7098 {
7099 addend = 0;
7100 if (r_type == R_PPC_PLTREL24 && info->shared)
7101 addend = rel->r_addend;
7102 ent = find_plt_ent (ifunc, got2, addend);
7103 }
7104 if (ent != NULL)
7105 {
7106 if (h == NULL && (ent->plt.offset & 1) == 0)
7107 {
7108 Elf_Internal_Rela rela;
7109 bfd_byte *loc;
7110
7111 rela.r_offset = (htab->iplt->output_section->vma
7112 + htab->iplt->output_offset
7113 + ent->plt.offset);
7114 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7115 rela.r_addend = relocation;
7116 loc = htab->reliplt->contents;
7117 loc += (htab->reliplt->reloc_count++
7118 * sizeof (Elf32_External_Rela));
7119 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7120
7121 ent->plt.offset |= 1;
7122 }
7123 if (h == NULL && (ent->glink_offset & 1) == 0)
7124 {
7125 unsigned char *p = ((unsigned char *) htab->glink->contents
7126 + ent->glink_offset);
7127 write_glink_stub (ent, htab->iplt, p, info);
7128 ent->glink_offset |= 1;
7129 }
7130
7131 unresolved_reloc = FALSE;
7132 if (htab->plt_type == PLT_NEW
7133 || !htab->elf.dynamic_sections_created
7134 || h == NULL)
7135 relocation = (htab->glink->output_section->vma
7136 + htab->glink->output_offset
7137 + (ent->glink_offset & ~1));
7138 else
7139 relocation = (htab->plt->output_section->vma
7140 + htab->plt->output_offset
7141 + ent->plt.offset);
7142 }
7143 }
7144
7145 addend = rel->r_addend;
7146 tls_type = 0;
7147 howto = NULL;
7148 if (r_type < R_PPC_max)
7149 howto = ppc_elf_howto_table[r_type];
7150 switch (r_type)
7151 {
7152 default:
7153 (*_bfd_error_handler)
7154 (_("%B: unknown relocation type %d for symbol %s"),
7155 input_bfd, (int) r_type, sym_name);
7156
7157 bfd_set_error (bfd_error_bad_value);
7158 ret = FALSE;
7159 continue;
7160
7161 case R_PPC_NONE:
7162 case R_PPC_TLS:
7163 case R_PPC_TLSGD:
7164 case R_PPC_TLSLD:
7165 case R_PPC_EMB_MRKREF:
7166 case R_PPC_GNU_VTINHERIT:
7167 case R_PPC_GNU_VTENTRY:
7168 continue;
7169
7170 /* GOT16 relocations. Like an ADDR16 using the symbol's
7171 address in the GOT as relocation value instead of the
7172 symbol's value itself. Also, create a GOT entry for the
7173 symbol and put the symbol value there. */
7174 case R_PPC_GOT_TLSGD16:
7175 case R_PPC_GOT_TLSGD16_LO:
7176 case R_PPC_GOT_TLSGD16_HI:
7177 case R_PPC_GOT_TLSGD16_HA:
7178 tls_type = TLS_TLS | TLS_GD;
7179 goto dogot;
7180
7181 case R_PPC_GOT_TLSLD16:
7182 case R_PPC_GOT_TLSLD16_LO:
7183 case R_PPC_GOT_TLSLD16_HI:
7184 case R_PPC_GOT_TLSLD16_HA:
7185 tls_type = TLS_TLS | TLS_LD;
7186 goto dogot;
7187
7188 case R_PPC_GOT_TPREL16:
7189 case R_PPC_GOT_TPREL16_LO:
7190 case R_PPC_GOT_TPREL16_HI:
7191 case R_PPC_GOT_TPREL16_HA:
7192 tls_type = TLS_TLS | TLS_TPREL;
7193 goto dogot;
7194
7195 case R_PPC_GOT_DTPREL16:
7196 case R_PPC_GOT_DTPREL16_LO:
7197 case R_PPC_GOT_DTPREL16_HI:
7198 case R_PPC_GOT_DTPREL16_HA:
7199 tls_type = TLS_TLS | TLS_DTPREL;
7200 goto dogot;
7201
7202 case R_PPC_GOT16:
7203 case R_PPC_GOT16_LO:
7204 case R_PPC_GOT16_HI:
7205 case R_PPC_GOT16_HA:
7206 tls_mask = 0;
7207 dogot:
7208 {
7209 /* Relocation is to the entry for this symbol in the global
7210 offset table. */
7211 bfd_vma off;
7212 bfd_vma *offp;
7213 unsigned long indx;
7214
7215 if (htab->got == NULL)
7216 abort ();
7217
7218 indx = 0;
7219 if (tls_type == (TLS_TLS | TLS_LD)
7220 && (h == NULL
7221 || !h->def_dynamic))
7222 offp = &htab->tlsld_got.offset;
7223 else if (h != NULL)
7224 {
7225 bfd_boolean dyn;
7226 dyn = htab->elf.dynamic_sections_created;
7227 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7228 || (info->shared
7229 && SYMBOL_REFERENCES_LOCAL (info, h)))
7230 /* This is actually a static link, or it is a
7231 -Bsymbolic link and the symbol is defined
7232 locally, or the symbol was forced to be local
7233 because of a version file. */
7234 ;
7235 else
7236 {
7237 indx = h->dynindx;
7238 unresolved_reloc = FALSE;
7239 }
7240 offp = &h->got.offset;
7241 }
7242 else
7243 {
7244 if (local_got_offsets == NULL)
7245 abort ();
7246 offp = &local_got_offsets[r_symndx];
7247 }
7248
7249 /* The offset must always be a multiple of 4. We use the
7250 least significant bit to record whether we have already
7251 processed this entry. */
7252 off = *offp;
7253 if ((off & 1) != 0)
7254 off &= ~1;
7255 else
7256 {
7257 unsigned int tls_m = (tls_mask
7258 & (TLS_LD | TLS_GD | TLS_DTPREL
7259 | TLS_TPREL | TLS_TPRELGD));
7260
7261 if (offp == &htab->tlsld_got.offset)
7262 tls_m = TLS_LD;
7263 else if (h == NULL
7264 || !h->def_dynamic)
7265 tls_m &= ~TLS_LD;
7266
7267 /* We might have multiple got entries for this sym.
7268 Initialize them all. */
7269 do
7270 {
7271 int tls_ty = 0;
7272
7273 if ((tls_m & TLS_LD) != 0)
7274 {
7275 tls_ty = TLS_TLS | TLS_LD;
7276 tls_m &= ~TLS_LD;
7277 }
7278 else if ((tls_m & TLS_GD) != 0)
7279 {
7280 tls_ty = TLS_TLS | TLS_GD;
7281 tls_m &= ~TLS_GD;
7282 }
7283 else if ((tls_m & TLS_DTPREL) != 0)
7284 {
7285 tls_ty = TLS_TLS | TLS_DTPREL;
7286 tls_m &= ~TLS_DTPREL;
7287 }
7288 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7289 {
7290 tls_ty = TLS_TLS | TLS_TPREL;
7291 tls_m = 0;
7292 }
7293
7294 /* Generate relocs for the dynamic linker. */
7295 if ((info->shared || indx != 0)
7296 && (offp == &htab->tlsld_got.offset
7297 || h == NULL
7298 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7299 || h->root.type != bfd_link_hash_undefweak))
7300 {
7301 asection *rsec = htab->relgot;
7302
7303 outrel.r_offset = (htab->got->output_section->vma
7304 + htab->got->output_offset
7305 + off);
7306 outrel.r_addend = 0;
7307 if (tls_ty & (TLS_LD | TLS_GD))
7308 {
7309 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7310 if (tls_ty == (TLS_TLS | TLS_GD))
7311 {
7312 loc = rsec->contents;
7313 loc += (rsec->reloc_count++
7314 * sizeof (Elf32_External_Rela));
7315 bfd_elf32_swap_reloca_out (output_bfd,
7316 &outrel, loc);
7317 outrel.r_offset += 4;
7318 outrel.r_info
7319 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7320 }
7321 }
7322 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7323 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7324 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7325 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7326 else if (indx != 0)
7327 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7328 else if (ifunc != NULL)
7329 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7330 else
7331 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7332 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7333 {
7334 outrel.r_addend += relocation;
7335 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7336 outrel.r_addend -= htab->elf.tls_sec->vma;
7337 }
7338 loc = rsec->contents;
7339 loc += (rsec->reloc_count++
7340 * sizeof (Elf32_External_Rela));
7341 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7342 }
7343
7344 /* Init the .got section contents if we're not
7345 emitting a reloc. */
7346 else
7347 {
7348 bfd_vma value = relocation;
7349
7350 if (tls_ty == (TLS_TLS | TLS_LD))
7351 value = 1;
7352 else if (tls_ty != 0)
7353 {
7354 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7355 if (tls_ty == (TLS_TLS | TLS_TPREL))
7356 value += DTP_OFFSET - TP_OFFSET;
7357
7358 if (tls_ty == (TLS_TLS | TLS_GD))
7359 {
7360 bfd_put_32 (output_bfd, value,
7361 htab->got->contents + off + 4);
7362 value = 1;
7363 }
7364 }
7365 bfd_put_32 (output_bfd, value,
7366 htab->got->contents + off);
7367 }
7368
7369 off += 4;
7370 if (tls_ty & (TLS_LD | TLS_GD))
7371 off += 4;
7372 }
7373 while (tls_m != 0);
7374
7375 off = *offp;
7376 *offp = off | 1;
7377 }
7378
7379 if (off >= (bfd_vma) -2)
7380 abort ();
7381
7382 if ((tls_type & TLS_TLS) != 0)
7383 {
7384 if (tls_type != (TLS_TLS | TLS_LD))
7385 {
7386 if ((tls_mask & TLS_LD) != 0
7387 && !(h == NULL
7388 || !h->def_dynamic))
7389 off += 8;
7390 if (tls_type != (TLS_TLS | TLS_GD))
7391 {
7392 if ((tls_mask & TLS_GD) != 0)
7393 off += 8;
7394 if (tls_type != (TLS_TLS | TLS_DTPREL))
7395 {
7396 if ((tls_mask & TLS_DTPREL) != 0)
7397 off += 4;
7398 }
7399 }
7400 }
7401 }
7402
7403 relocation = (htab->got->output_section->vma
7404 + htab->got->output_offset
7405 + off
7406 - SYM_VAL (htab->elf.hgot));
7407
7408 /* Addends on got relocations don't make much sense.
7409 x+off@got is actually x@got+off, and since the got is
7410 generated by a hash table traversal, the value in the
7411 got at entry m+n bears little relation to the entry m. */
7412 if (addend != 0)
7413 (*_bfd_error_handler)
7414 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7415 input_bfd,
7416 input_section,
7417 (long) rel->r_offset,
7418 howto->name,
7419 sym_name);
7420 }
7421 break;
7422
7423 /* Relocations that need no special processing. */
7424 case R_PPC_LOCAL24PC:
7425 /* It makes no sense to point a local relocation
7426 at a symbol not in this object. */
7427 if (unresolved_reloc)
7428 {
7429 if (! (*info->callbacks->undefined_symbol) (info,
7430 h->root.root.string,
7431 input_bfd,
7432 input_section,
7433 rel->r_offset,
7434 TRUE))
7435 return FALSE;
7436 continue;
7437 }
7438 break;
7439
7440 case R_PPC_DTPREL16:
7441 case R_PPC_DTPREL16_LO:
7442 case R_PPC_DTPREL16_HI:
7443 case R_PPC_DTPREL16_HA:
7444 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7445 break;
7446
7447 /* Relocations that may need to be propagated if this is a shared
7448 object. */
7449 case R_PPC_TPREL16:
7450 case R_PPC_TPREL16_LO:
7451 case R_PPC_TPREL16_HI:
7452 case R_PPC_TPREL16_HA:
7453 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7454 /* The TPREL16 relocs shouldn't really be used in shared
7455 libs as they will result in DT_TEXTREL being set, but
7456 support them anyway. */
7457 goto dodyn;
7458
7459 case R_PPC_TPREL32:
7460 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7461 goto dodyn;
7462
7463 case R_PPC_DTPREL32:
7464 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7465 goto dodyn;
7466
7467 case R_PPC_DTPMOD32:
7468 relocation = 1;
7469 addend = 0;
7470 goto dodyn;
7471
7472 case R_PPC_REL16:
7473 case R_PPC_REL16_LO:
7474 case R_PPC_REL16_HI:
7475 case R_PPC_REL16_HA:
7476 break;
7477
7478 case R_PPC_REL32:
7479 if (h == NULL || h == htab->elf.hgot)
7480 break;
7481 /* fall through */
7482
7483 case R_PPC_ADDR32:
7484 case R_PPC_ADDR16:
7485 case R_PPC_ADDR16_LO:
7486 case R_PPC_ADDR16_HI:
7487 case R_PPC_ADDR16_HA:
7488 case R_PPC_UADDR32:
7489 case R_PPC_UADDR16:
7490 goto dodyn;
7491
7492 case R_PPC_REL24:
7493 case R_PPC_REL14:
7494 case R_PPC_REL14_BRTAKEN:
7495 case R_PPC_REL14_BRNTAKEN:
7496 /* If these relocations are not to a named symbol, they can be
7497 handled right here, no need to bother the dynamic linker. */
7498 if (SYMBOL_CALLS_LOCAL (info, h)
7499 || h == htab->elf.hgot)
7500 break;
7501 /* fall through */
7502
7503 case R_PPC_ADDR24:
7504 case R_PPC_ADDR14:
7505 case R_PPC_ADDR14_BRTAKEN:
7506 case R_PPC_ADDR14_BRNTAKEN:
7507 if (h != NULL && !info->shared)
7508 break;
7509 /* fall through */
7510
7511 dodyn:
7512 if ((input_section->flags & SEC_ALLOC) == 0
7513 || is_vxworks_tls)
7514 break;
7515
7516 if ((info->shared
7517 && !(h != NULL
7518 && ((h->root.type == bfd_link_hash_undefined
7519 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7520 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7521 || (h->root.type == bfd_link_hash_undefweak
7522 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7523 && (must_be_dyn_reloc (info, r_type)
7524 || !SYMBOL_CALLS_LOCAL (info, h)))
7525 || (ELIMINATE_COPY_RELOCS
7526 && !info->shared
7527 && h != NULL
7528 && h->dynindx != -1
7529 && !h->non_got_ref
7530 && !h->def_regular))
7531 {
7532 int skip;
7533
7534 #ifdef DEBUG
7535 fprintf (stderr, "ppc_elf_relocate_section needs to "
7536 "create relocation for %s\n",
7537 (h && h->root.root.string
7538 ? h->root.root.string : "<unknown>"));
7539 #endif
7540
7541 /* When generating a shared object, these relocations
7542 are copied into the output file to be resolved at run
7543 time. */
7544 if (sreloc == NULL)
7545 {
7546 sreloc = elf_section_data (input_section)->sreloc;
7547 if (!htab->elf.dynamic_sections_created)
7548 sreloc = htab->reliplt;
7549 if (sreloc == NULL)
7550 return FALSE;
7551 }
7552
7553 skip = 0;
7554 outrel.r_offset =
7555 _bfd_elf_section_offset (output_bfd, info, input_section,
7556 rel->r_offset);
7557 if (outrel.r_offset == (bfd_vma) -1
7558 || outrel.r_offset == (bfd_vma) -2)
7559 skip = (int) outrel.r_offset;
7560 outrel.r_offset += (input_section->output_section->vma
7561 + input_section->output_offset);
7562
7563 if (skip)
7564 memset (&outrel, 0, sizeof outrel);
7565 else if ((h != NULL
7566 && (h->root.type == bfd_link_hash_undefined
7567 || h->root.type == bfd_link_hash_undefweak))
7568 || !SYMBOL_REFERENCES_LOCAL (info, h))
7569 {
7570 unresolved_reloc = FALSE;
7571 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7572 outrel.r_addend = rel->r_addend;
7573 }
7574 else
7575 {
7576 outrel.r_addend = relocation + rel->r_addend;
7577
7578 if (r_type != R_PPC_ADDR32)
7579 {
7580 long indx = 0;
7581
7582 if (ifunc != NULL)
7583 {
7584 /* If we get here when building a static
7585 executable, then the libc startup function
7586 responsible for applying indirect function
7587 relocations is going to complain about
7588 the reloc type.
7589 If we get here when building a dynamic
7590 executable, it will be because we have
7591 a text relocation. The dynamic loader
7592 will set the text segment writable and
7593 non-executable to apply text relocations.
7594 So we'll segfault when trying to run the
7595 indirection function to resolve the reloc. */
7596 (*_bfd_error_handler)
7597 (_("%B(%A+0x%lx): relocation %s for indirect "
7598 "function %s unsupported"),
7599 input_bfd,
7600 input_section,
7601 (long) rel->r_offset,
7602 howto->name,
7603 sym_name);
7604 ret = FALSE;
7605 }
7606 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7607 ;
7608 else if (sec == NULL || sec->owner == NULL)
7609 {
7610 bfd_set_error (bfd_error_bad_value);
7611 ret = FALSE;
7612 }
7613 else
7614 {
7615 asection *osec;
7616
7617 /* We are turning this relocation into one
7618 against a section symbol. It would be
7619 proper to subtract the symbol's value,
7620 osec->vma, from the emitted reloc addend,
7621 but ld.so expects buggy relocs.
7622 FIXME: Why not always use a zero index? */
7623 osec = sec->output_section;
7624 indx = elf_section_data (osec)->dynindx;
7625 if (indx == 0)
7626 {
7627 osec = htab->elf.text_index_section;
7628 indx = elf_section_data (osec)->dynindx;
7629 }
7630 BFD_ASSERT (indx != 0);
7631 #ifdef DEBUG
7632 if (indx == 0)
7633 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7634 indx, osec->name, osec->flags,
7635 h->root.root.string);
7636 #endif
7637 }
7638
7639 outrel.r_info = ELF32_R_INFO (indx, r_type);
7640 }
7641 else if (ifunc != NULL)
7642 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7643 else
7644 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7645 }
7646
7647 loc = sreloc->contents;
7648 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7649 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7650
7651 if (skip == -1)
7652 continue;
7653
7654 /* This reloc will be computed at runtime. We clear the memory
7655 so that it contains predictable value. */
7656 if (! skip
7657 && ((input_section->flags & SEC_ALLOC) != 0
7658 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7659 {
7660 relocation = howto->pc_relative ? outrel.r_offset : 0;
7661 addend = 0;
7662 break;
7663 }
7664 }
7665 break;
7666
7667 case R_PPC_RELAX32PC_PLT:
7668 case R_PPC_RELAX32_PLT:
7669 if (h != NULL)
7670 {
7671 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7672 info->shared ? addend : 0);
7673 if (htab->plt_type == PLT_NEW)
7674 relocation = (htab->glink->output_section->vma
7675 + htab->glink->output_offset
7676 + ent->glink_offset);
7677 else
7678 relocation = (htab->plt->output_section->vma
7679 + htab->plt->output_offset
7680 + ent->plt.offset);
7681 }
7682 if (r_type == R_PPC_RELAX32_PLT)
7683 goto relax32;
7684 /* Fall thru */
7685
7686 case R_PPC_RELAX32PC:
7687 relocation -= (input_section->output_section->vma
7688 + input_section->output_offset
7689 + rel->r_offset - 4);
7690 /* Fall thru */
7691
7692 case R_PPC_RELAX32:
7693 relax32:
7694 {
7695 unsigned long t0;
7696 unsigned long t1;
7697
7698 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7699 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7700
7701 /* We're clearing the bits for R_PPC_ADDR16_HA
7702 and R_PPC_ADDR16_LO here. */
7703 t0 &= ~0xffff;
7704 t1 &= ~0xffff;
7705
7706 /* t0 is HA, t1 is LO */
7707 relocation += addend;
7708 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7709 t1 |= relocation & 0xffff;
7710
7711 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7712 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7713
7714 /* Rewrite the reloc and convert one of the trailing nop
7715 relocs to describe this relocation. */
7716 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7717 /* The relocs are at the bottom 2 bytes */
7718 rel[0].r_offset += 2;
7719 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7720 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7721 rel[1].r_offset += 4;
7722 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7723 rel++;
7724 }
7725 continue;
7726
7727 /* Indirect .sdata relocation. */
7728 case R_PPC_EMB_SDAI16:
7729 BFD_ASSERT (htab->sdata[0].section != NULL);
7730 if (!is_static_defined (htab->sdata[0].sym))
7731 {
7732 unresolved_reloc = TRUE;
7733 break;
7734 }
7735 relocation
7736 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7737 h, relocation, rel);
7738 addend = 0;
7739 break;
7740
7741 /* Indirect .sdata2 relocation. */
7742 case R_PPC_EMB_SDA2I16:
7743 BFD_ASSERT (htab->sdata[1].section != NULL);
7744 if (!is_static_defined (htab->sdata[1].sym))
7745 {
7746 unresolved_reloc = TRUE;
7747 break;
7748 }
7749 relocation
7750 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7751 h, relocation, rel);
7752 addend = 0;
7753 break;
7754
7755 /* Handle the TOC16 reloc. We want to use the offset within the .got
7756 section, not the actual VMA. This is appropriate when generating
7757 an embedded ELF object, for which the .got section acts like the
7758 AIX .toc section. */
7759 case R_PPC_TOC16: /* phony GOT16 relocations */
7760 if (sec == NULL || sec->output_section == NULL)
7761 {
7762 unresolved_reloc = TRUE;
7763 break;
7764 }
7765 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7766 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7767
7768 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7769 break;
7770
7771 case R_PPC_PLTREL24:
7772 if (h == NULL || ifunc != NULL)
7773 break;
7774 /* Relocation is to the entry for this symbol in the
7775 procedure linkage table. */
7776 {
7777 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7778 info->shared ? addend : 0);
7779 addend = 0;
7780 if (ent == NULL
7781 || htab->plt == NULL)
7782 {
7783 /* We didn't make a PLT entry for this symbol. This
7784 happens when statically linking PIC code, or when
7785 using -Bsymbolic. */
7786 break;
7787 }
7788
7789 unresolved_reloc = FALSE;
7790 if (htab->plt_type == PLT_NEW)
7791 relocation = (htab->glink->output_section->vma
7792 + htab->glink->output_offset
7793 + ent->glink_offset);
7794 else
7795 relocation = (htab->plt->output_section->vma
7796 + htab->plt->output_offset
7797 + ent->plt.offset);
7798 }
7799 break;
7800
7801 /* Relocate against _SDA_BASE_. */
7802 case R_PPC_SDAREL16:
7803 {
7804 const char *name;
7805 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7806
7807 if (sec == NULL
7808 || sec->output_section == NULL
7809 || !is_static_defined (sda))
7810 {
7811 unresolved_reloc = TRUE;
7812 break;
7813 }
7814 addend -= SYM_VAL (sda);
7815
7816 name = bfd_get_section_name (abfd, sec->output_section);
7817 if (! ((CONST_STRNEQ (name, ".sdata")
7818 && (name[6] == 0 || name[6] == '.'))
7819 || (CONST_STRNEQ (name, ".sbss")
7820 && (name[5] == 0 || name[5] == '.'))))
7821 {
7822 (*_bfd_error_handler)
7823 (_("%B: the target (%s) of a %s relocation is "
7824 "in the wrong output section (%s)"),
7825 input_bfd,
7826 sym_name,
7827 howto->name,
7828 name);
7829 }
7830 }
7831 break;
7832
7833 /* Relocate against _SDA2_BASE_. */
7834 case R_PPC_EMB_SDA2REL:
7835 {
7836 const char *name;
7837 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7838
7839 if (sec == NULL
7840 || sec->output_section == NULL
7841 || !is_static_defined (sda))
7842 {
7843 unresolved_reloc = TRUE;
7844 break;
7845 }
7846 addend -= SYM_VAL (sda);
7847
7848 name = bfd_get_section_name (abfd, sec->output_section);
7849 if (! (CONST_STRNEQ (name, ".sdata2")
7850 || CONST_STRNEQ (name, ".sbss2")))
7851 {
7852 (*_bfd_error_handler)
7853 (_("%B: the target (%s) of a %s relocation is "
7854 "in the wrong output section (%s)"),
7855 input_bfd,
7856 sym_name,
7857 howto->name,
7858 name);
7859 }
7860 }
7861 break;
7862
7863 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7864 case R_PPC_EMB_SDA21:
7865 case R_PPC_EMB_RELSDA:
7866 {
7867 const char *name;
7868 int reg;
7869 struct elf_link_hash_entry *sda = NULL;
7870
7871 if (sec == NULL || sec->output_section == NULL)
7872 {
7873 unresolved_reloc = TRUE;
7874 break;
7875 }
7876
7877 name = bfd_get_section_name (abfd, sec->output_section);
7878 if (((CONST_STRNEQ (name, ".sdata")
7879 && (name[6] == 0 || name[6] == '.'))
7880 || (CONST_STRNEQ (name, ".sbss")
7881 && (name[5] == 0 || name[5] == '.'))))
7882 {
7883 reg = 13;
7884 sda = htab->sdata[0].sym;
7885 }
7886 else if (CONST_STRNEQ (name, ".sdata2")
7887 || CONST_STRNEQ (name, ".sbss2"))
7888 {
7889 reg = 2;
7890 sda = htab->sdata[1].sym;
7891 }
7892 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7893 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7894 {
7895 reg = 0;
7896 }
7897 else
7898 {
7899 (*_bfd_error_handler)
7900 (_("%B: the target (%s) of a %s relocation is "
7901 "in the wrong output section (%s)"),
7902 input_bfd,
7903 sym_name,
7904 howto->name,
7905 name);
7906
7907 bfd_set_error (bfd_error_bad_value);
7908 ret = FALSE;
7909 continue;
7910 }
7911
7912 if (sda != NULL)
7913 {
7914 if (!is_static_defined (sda))
7915 {
7916 unresolved_reloc = TRUE;
7917 break;
7918 }
7919 addend -= SYM_VAL (sda);
7920 }
7921
7922 if (r_type == R_PPC_EMB_SDA21)
7923 { /* fill in register field */
7924 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7925 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7926 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7927 }
7928 }
7929 break;
7930
7931 /* Relocate against the beginning of the section. */
7932 case R_PPC_SECTOFF:
7933 case R_PPC_SECTOFF_LO:
7934 case R_PPC_SECTOFF_HI:
7935 case R_PPC_SECTOFF_HA:
7936 if (sec == NULL || sec->output_section == NULL)
7937 {
7938 unresolved_reloc = TRUE;
7939 break;
7940 }
7941 addend -= sec->output_section->vma;
7942 break;
7943
7944 /* Negative relocations. */
7945 case R_PPC_EMB_NADDR32:
7946 case R_PPC_EMB_NADDR16:
7947 case R_PPC_EMB_NADDR16_LO:
7948 case R_PPC_EMB_NADDR16_HI:
7949 case R_PPC_EMB_NADDR16_HA:
7950 addend -= 2 * relocation;
7951 break;
7952
7953 case R_PPC_COPY:
7954 case R_PPC_GLOB_DAT:
7955 case R_PPC_JMP_SLOT:
7956 case R_PPC_RELATIVE:
7957 case R_PPC_IRELATIVE:
7958 case R_PPC_PLT32:
7959 case R_PPC_PLTREL32:
7960 case R_PPC_PLT16_LO:
7961 case R_PPC_PLT16_HI:
7962 case R_PPC_PLT16_HA:
7963 case R_PPC_ADDR30:
7964 case R_PPC_EMB_RELSEC16:
7965 case R_PPC_EMB_RELST_LO:
7966 case R_PPC_EMB_RELST_HI:
7967 case R_PPC_EMB_RELST_HA:
7968 case R_PPC_EMB_BIT_FLD:
7969 (*_bfd_error_handler)
7970 (_("%B: relocation %s is not yet supported for symbol %s."),
7971 input_bfd,
7972 howto->name,
7973 sym_name);
7974
7975 bfd_set_error (bfd_error_invalid_operation);
7976 ret = FALSE;
7977 continue;
7978 }
7979
7980 /* Do any further special processing. */
7981 switch (r_type)
7982 {
7983 default:
7984 break;
7985
7986 case R_PPC_ADDR16_HA:
7987 case R_PPC_REL16_HA:
7988 case R_PPC_SECTOFF_HA:
7989 case R_PPC_TPREL16_HA:
7990 case R_PPC_DTPREL16_HA:
7991 case R_PPC_EMB_NADDR16_HA:
7992 case R_PPC_EMB_RELST_HA:
7993 /* It's just possible that this symbol is a weak symbol
7994 that's not actually defined anywhere. In that case,
7995 'sec' would be NULL, and we should leave the symbol
7996 alone (it will be set to zero elsewhere in the link). */
7997 if (sec == NULL)
7998 break;
7999 /* Fall thru */
8000
8001 case R_PPC_PLT16_HA:
8002 case R_PPC_GOT16_HA:
8003 case R_PPC_GOT_TLSGD16_HA:
8004 case R_PPC_GOT_TLSLD16_HA:
8005 case R_PPC_GOT_TPREL16_HA:
8006 case R_PPC_GOT_DTPREL16_HA:
8007 /* Add 0x10000 if sign bit in 0:15 is set.
8008 Bits 0:15 are not used. */
8009 addend += 0x8000;
8010 break;
8011 }
8012
8013 #ifdef DEBUG
8014 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8015 "offset = %ld, addend = %ld\n",
8016 howto->name,
8017 (int) r_type,
8018 sym_name,
8019 r_symndx,
8020 (long) rel->r_offset,
8021 (long) addend);
8022 #endif
8023
8024 if (unresolved_reloc
8025 && !((input_section->flags & SEC_DEBUGGING) != 0
8026 && h->def_dynamic))
8027 {
8028 (*_bfd_error_handler)
8029 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8030 input_bfd,
8031 input_section,
8032 (long) rel->r_offset,
8033 howto->name,
8034 sym_name);
8035 ret = FALSE;
8036 }
8037
8038 r = _bfd_final_link_relocate (howto,
8039 input_bfd,
8040 input_section,
8041 contents,
8042 rel->r_offset,
8043 relocation,
8044 addend);
8045
8046 if (r != bfd_reloc_ok)
8047 {
8048 if (r == bfd_reloc_overflow)
8049 {
8050 if (warned)
8051 continue;
8052 if (h != NULL
8053 && h->root.type == bfd_link_hash_undefweak
8054 && howto->pc_relative)
8055 {
8056 /* Assume this is a call protected by other code that
8057 detect the symbol is undefined. If this is the case,
8058 we can safely ignore the overflow. If not, the
8059 program is hosed anyway, and a little warning isn't
8060 going to help. */
8061
8062 continue;
8063 }
8064
8065 if (! (*info->callbacks->reloc_overflow) (info,
8066 (h ? &h->root : NULL),
8067 sym_name,
8068 howto->name,
8069 rel->r_addend,
8070 input_bfd,
8071 input_section,
8072 rel->r_offset))
8073 return FALSE;
8074 }
8075 else
8076 {
8077 (*_bfd_error_handler)
8078 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8079 input_bfd, input_section,
8080 (long) rel->r_offset, howto->name, sym_name, (int) r);
8081 ret = FALSE;
8082 }
8083 }
8084 }
8085
8086 #ifdef DEBUG
8087 fprintf (stderr, "\n");
8088 #endif
8089
8090 return ret;
8091 }
8092 \f
8093 /* Finish up dynamic symbol handling. We set the contents of various
8094 dynamic sections here. */
8095
8096 static bfd_boolean
8097 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8098 struct bfd_link_info *info,
8099 struct elf_link_hash_entry *h,
8100 Elf_Internal_Sym *sym)
8101 {
8102 struct ppc_elf_link_hash_table *htab;
8103 struct plt_entry *ent;
8104 bfd_boolean doneone;
8105
8106 #ifdef DEBUG
8107 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8108 h->root.root.string);
8109 #endif
8110
8111 htab = ppc_elf_hash_table (info);
8112 BFD_ASSERT (htab->elf.dynobj != NULL);
8113
8114 doneone = FALSE;
8115 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8116 if (ent->plt.offset != (bfd_vma) -1)
8117 {
8118 if (!doneone)
8119 {
8120 Elf_Internal_Rela rela;
8121 bfd_byte *loc;
8122 bfd_vma reloc_index;
8123
8124 if (htab->plt_type == PLT_NEW
8125 || !htab->elf.dynamic_sections_created
8126 || h->dynindx == -1)
8127 reloc_index = ent->plt.offset / 4;
8128 else
8129 {
8130 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8131 / htab->plt_slot_size);
8132 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8133 && htab->plt_type == PLT_OLD)
8134 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8135 }
8136
8137 /* This symbol has an entry in the procedure linkage table.
8138 Set it up. */
8139 if (htab->plt_type == PLT_VXWORKS
8140 && htab->elf.dynamic_sections_created
8141 && h->dynindx != -1)
8142 {
8143 bfd_vma got_offset;
8144 const bfd_vma *plt_entry;
8145
8146 /* The first three entries in .got.plt are reserved. */
8147 got_offset = (reloc_index + 3) * 4;
8148
8149 /* Use the right PLT. */
8150 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8151 : ppc_elf_vxworks_plt_entry;
8152
8153 /* Fill in the .plt on VxWorks. */
8154 if (info->shared)
8155 {
8156 bfd_put_32 (output_bfd,
8157 plt_entry[0] | PPC_HA (got_offset),
8158 htab->plt->contents + ent->plt.offset + 0);
8159 bfd_put_32 (output_bfd,
8160 plt_entry[1] | PPC_LO (got_offset),
8161 htab->plt->contents + ent->plt.offset + 4);
8162 }
8163 else
8164 {
8165 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8166
8167 bfd_put_32 (output_bfd,
8168 plt_entry[0] | PPC_HA (got_loc),
8169 htab->plt->contents + ent->plt.offset + 0);
8170 bfd_put_32 (output_bfd,
8171 plt_entry[1] | PPC_LO (got_loc),
8172 htab->plt->contents + ent->plt.offset + 4);
8173 }
8174
8175 bfd_put_32 (output_bfd, plt_entry[2],
8176 htab->plt->contents + ent->plt.offset + 8);
8177 bfd_put_32 (output_bfd, plt_entry[3],
8178 htab->plt->contents + ent->plt.offset + 12);
8179
8180 /* This instruction is an immediate load. The value loaded is
8181 the byte offset of the R_PPC_JMP_SLOT relocation from the
8182 start of the .rela.plt section. The value is stored in the
8183 low-order 16 bits of the load instruction. */
8184 /* NOTE: It appears that this is now an index rather than a
8185 prescaled offset. */
8186 bfd_put_32 (output_bfd,
8187 plt_entry[4] | reloc_index,
8188 htab->plt->contents + ent->plt.offset + 16);
8189 /* This instruction is a PC-relative branch whose target is
8190 the start of the PLT section. The address of this branch
8191 instruction is 20 bytes beyond the start of this PLT entry.
8192 The address is encoded in bits 6-29, inclusive. The value
8193 stored is right-shifted by two bits, permitting a 26-bit
8194 offset. */
8195 bfd_put_32 (output_bfd,
8196 (plt_entry[5]
8197 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8198 htab->plt->contents + ent->plt.offset + 20);
8199 bfd_put_32 (output_bfd, plt_entry[6],
8200 htab->plt->contents + ent->plt.offset + 24);
8201 bfd_put_32 (output_bfd, plt_entry[7],
8202 htab->plt->contents + ent->plt.offset + 28);
8203
8204 /* Fill in the GOT entry corresponding to this PLT slot with
8205 the address immediately after the the "bctr" instruction
8206 in this PLT entry. */
8207 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8208 + htab->plt->output_offset
8209 + ent->plt.offset + 16),
8210 htab->sgotplt->contents + got_offset);
8211
8212 if (!info->shared)
8213 {
8214 /* Fill in a couple of entries in .rela.plt.unloaded. */
8215 loc = htab->srelplt2->contents
8216 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8217 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8218 * sizeof (Elf32_External_Rela));
8219
8220 /* Provide the @ha relocation for the first instruction. */
8221 rela.r_offset = (htab->plt->output_section->vma
8222 + htab->plt->output_offset
8223 + ent->plt.offset + 2);
8224 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8225 R_PPC_ADDR16_HA);
8226 rela.r_addend = got_offset;
8227 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8228 loc += sizeof (Elf32_External_Rela);
8229
8230 /* Provide the @l relocation for the second instruction. */
8231 rela.r_offset = (htab->plt->output_section->vma
8232 + htab->plt->output_offset
8233 + ent->plt.offset + 6);
8234 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8235 R_PPC_ADDR16_LO);
8236 rela.r_addend = got_offset;
8237 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8238 loc += sizeof (Elf32_External_Rela);
8239
8240 /* Provide a relocation for the GOT entry corresponding to this
8241 PLT slot. Point it at the middle of the .plt entry. */
8242 rela.r_offset = (htab->sgotplt->output_section->vma
8243 + htab->sgotplt->output_offset
8244 + got_offset);
8245 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8246 R_PPC_ADDR32);
8247 rela.r_addend = ent->plt.offset + 16;
8248 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8249 }
8250
8251 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8252 In particular, the offset for the relocation is not the
8253 address of the PLT entry for this function, as specified
8254 by the ABI. Instead, the offset is set to the address of
8255 the GOT slot for this function. See EABI 4.4.4.1. */
8256 rela.r_offset = (htab->sgotplt->output_section->vma
8257 + htab->sgotplt->output_offset
8258 + got_offset);
8259
8260 }
8261 else
8262 {
8263 asection *splt = htab->plt;
8264 if (!htab->elf.dynamic_sections_created
8265 || h->dynindx == -1)
8266 splt = htab->iplt;
8267
8268 rela.r_offset = (splt->output_section->vma
8269 + splt->output_offset
8270 + ent->plt.offset);
8271 if (htab->plt_type == PLT_OLD
8272 || !htab->elf.dynamic_sections_created
8273 || h->dynindx == -1)
8274 {
8275 /* We don't need to fill in the .plt. The ppc dynamic
8276 linker will fill it in. */
8277 }
8278 else
8279 {
8280 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8281 + htab->glink->output_section->vma
8282 + htab->glink->output_offset);
8283 bfd_put_32 (output_bfd, val,
8284 splt->contents + ent->plt.offset);
8285 }
8286 }
8287
8288 /* Fill in the entry in the .rela.plt section. */
8289 rela.r_addend = 0;
8290 if (!htab->elf.dynamic_sections_created
8291 || h->dynindx == -1)
8292 {
8293 BFD_ASSERT (h->type == STT_GNU_IFUNC
8294 && h->def_regular
8295 && (h->root.type == bfd_link_hash_defined
8296 || h->root.type == bfd_link_hash_defweak));
8297 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8298 rela.r_addend = SYM_VAL (h);
8299 }
8300 else
8301 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8302
8303 if (!htab->elf.dynamic_sections_created
8304 || h->dynindx == -1)
8305 loc = (htab->reliplt->contents
8306 + (htab->reliplt->reloc_count++
8307 * sizeof (Elf32_External_Rela)));
8308 else
8309 loc = (htab->relplt->contents
8310 + reloc_index * sizeof (Elf32_External_Rela));
8311 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8312
8313 if (!h->def_regular)
8314 {
8315 /* Mark the symbol as undefined, rather than as
8316 defined in the .plt section. Leave the value if
8317 there were any relocations where pointer equality
8318 matters (this is a clue for the dynamic linker, to
8319 make function pointer comparisons work between an
8320 application and shared library), otherwise set it
8321 to zero. */
8322 sym->st_shndx = SHN_UNDEF;
8323 if (!h->pointer_equality_needed)
8324 sym->st_value = 0;
8325 else if (!h->ref_regular_nonweak)
8326 {
8327 /* This breaks function pointer comparisons, but
8328 that is better than breaking tests for a NULL
8329 function pointer. */
8330 sym->st_value = 0;
8331 }
8332 }
8333 else if (h->type == STT_GNU_IFUNC
8334 && !info->shared)
8335 {
8336 /* Set the value of ifunc symbols in a non-pie
8337 executable to the glink entry. This is to avoid
8338 text relocations. We can't do this for ifunc in
8339 allocate_dynrelocs, as we do for normal dynamic
8340 function symbols with plt entries, because we need
8341 to keep the original value around for the ifunc
8342 relocation. */
8343 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8344 (output_bfd, htab->glink->output_section));
8345 sym->st_value = (ent->glink_offset +
8346 htab->glink->output_offset
8347 + htab->glink->output_section->vma);
8348 }
8349 doneone = TRUE;
8350 }
8351
8352 if (htab->plt_type == PLT_NEW
8353 || !htab->elf.dynamic_sections_created
8354 || h->dynindx == -1)
8355 {
8356 unsigned char *p;
8357 asection *splt = htab->plt;
8358 if (!htab->elf.dynamic_sections_created
8359 || h->dynindx == -1)
8360 splt = htab->iplt;
8361
8362 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8363
8364 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8365 {
8366 bfd_put_32 (output_bfd, LWZ_11_3, p);
8367 p += 4;
8368 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8369 p += 4;
8370 bfd_put_32 (output_bfd, MR_0_3, p);
8371 p += 4;
8372 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8373 p += 4;
8374 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8375 p += 4;
8376 bfd_put_32 (output_bfd, BEQLR, p);
8377 p += 4;
8378 bfd_put_32 (output_bfd, MR_3_0, p);
8379 p += 4;
8380 bfd_put_32 (output_bfd, NOP, p);
8381 p += 4;
8382 }
8383
8384 write_glink_stub (ent, splt, p, info);
8385
8386 if (!info->shared)
8387 /* We only need one non-PIC glink stub. */
8388 break;
8389 }
8390 else
8391 break;
8392 }
8393
8394 if (h->needs_copy)
8395 {
8396 asection *s;
8397 Elf_Internal_Rela rela;
8398 bfd_byte *loc;
8399
8400 /* This symbols needs a copy reloc. Set it up. */
8401
8402 #ifdef DEBUG
8403 fprintf (stderr, ", copy");
8404 #endif
8405
8406 BFD_ASSERT (h->dynindx != -1);
8407
8408 if (ppc_elf_hash_entry (h)->has_sda_refs)
8409 s = htab->relsbss;
8410 else
8411 s = htab->relbss;
8412 BFD_ASSERT (s != NULL);
8413
8414 rela.r_offset = SYM_VAL (h);
8415 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8416 rela.r_addend = 0;
8417 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8418 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8419 }
8420
8421 #ifdef DEBUG
8422 fprintf (stderr, "\n");
8423 #endif
8424
8425 /* Mark some specially defined symbols as absolute. */
8426 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8427 || (!htab->is_vxworks
8428 && (h == htab->elf.hgot
8429 || strcmp (h->root.root.string,
8430 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8431 sym->st_shndx = SHN_ABS;
8432
8433 return TRUE;
8434 }
8435 \f
8436 static enum elf_reloc_type_class
8437 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8438 {
8439 switch (ELF32_R_TYPE (rela->r_info))
8440 {
8441 case R_PPC_RELATIVE:
8442 return reloc_class_relative;
8443 case R_PPC_REL24:
8444 case R_PPC_ADDR24:
8445 case R_PPC_JMP_SLOT:
8446 return reloc_class_plt;
8447 case R_PPC_COPY:
8448 return reloc_class_copy;
8449 default:
8450 return reloc_class_normal;
8451 }
8452 }
8453 \f
8454 /* Finish up the dynamic sections. */
8455
8456 static bfd_boolean
8457 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8458 struct bfd_link_info *info)
8459 {
8460 asection *sdyn;
8461 asection *splt;
8462 struct ppc_elf_link_hash_table *htab;
8463 bfd_vma got;
8464 bfd *dynobj;
8465 bfd_boolean ret = TRUE;
8466
8467 #ifdef DEBUG
8468 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8469 #endif
8470
8471 htab = ppc_elf_hash_table (info);
8472 dynobj = elf_hash_table (info)->dynobj;
8473 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8474 if (htab->is_vxworks)
8475 splt = bfd_get_section_by_name (dynobj, ".plt");
8476 else
8477 splt = NULL;
8478
8479 got = 0;
8480 if (htab->elf.hgot != NULL)
8481 got = SYM_VAL (htab->elf.hgot);
8482
8483 if (htab->elf.dynamic_sections_created)
8484 {
8485 Elf32_External_Dyn *dyncon, *dynconend;
8486
8487 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8488
8489 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8490 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8491 for (; dyncon < dynconend; dyncon++)
8492 {
8493 Elf_Internal_Dyn dyn;
8494 asection *s;
8495
8496 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8497
8498 switch (dyn.d_tag)
8499 {
8500 case DT_PLTGOT:
8501 if (htab->is_vxworks)
8502 s = htab->sgotplt;
8503 else
8504 s = htab->plt;
8505 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8506 break;
8507
8508 case DT_PLTRELSZ:
8509 dyn.d_un.d_val = htab->relplt->size;
8510 break;
8511
8512 case DT_JMPREL:
8513 s = htab->relplt;
8514 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8515 break;
8516
8517 case DT_PPC_GOT:
8518 dyn.d_un.d_ptr = got;
8519 break;
8520
8521 case DT_RELASZ:
8522 if (htab->is_vxworks)
8523 {
8524 if (htab->relplt)
8525 dyn.d_un.d_ptr -= htab->relplt->size;
8526 break;
8527 }
8528 continue;
8529
8530 default:
8531 if (htab->is_vxworks
8532 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8533 break;
8534 continue;
8535 }
8536
8537 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8538 }
8539 }
8540
8541 if (htab->got != NULL)
8542 {
8543 if (htab->elf.hgot->root.u.def.section == htab->got
8544 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8545 {
8546 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8547
8548 p += htab->elf.hgot->root.u.def.value;
8549 if (htab->plt_type == PLT_OLD)
8550 {
8551 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8552 so that a function can easily find the address of
8553 _GLOBAL_OFFSET_TABLE_. */
8554 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8555 < htab->elf.hgot->root.u.def.section->size);
8556 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8557 }
8558
8559 if (sdyn != NULL)
8560 {
8561 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8562 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8563 < htab->elf.hgot->root.u.def.section->size);
8564 bfd_put_32 (output_bfd, val, p);
8565 }
8566 }
8567 else
8568 {
8569 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8570 htab->elf.hgot->root.root.string,
8571 (htab->sgotplt != NULL
8572 ? htab->sgotplt->name : htab->got->name));
8573 bfd_set_error (bfd_error_bad_value);
8574 ret = FALSE;
8575 }
8576
8577 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8578 }
8579
8580 /* Fill in the first entry in the VxWorks procedure linkage table. */
8581 if (splt && splt->size > 0)
8582 {
8583 /* Use the right PLT. */
8584 static const bfd_vma *plt_entry = NULL;
8585 plt_entry = info->shared ?
8586 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8587
8588 if (!info->shared)
8589 {
8590 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8591
8592 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8593 splt->contents + 0);
8594 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8595 splt->contents + 4);
8596 }
8597 else
8598 {
8599 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8600 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8601 }
8602 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8603 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8604 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8605 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8606 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8607 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8608
8609 if (! info->shared)
8610 {
8611 Elf_Internal_Rela rela;
8612 bfd_byte *loc;
8613
8614 loc = htab->srelplt2->contents;
8615
8616 /* Output the @ha relocation for the first instruction. */
8617 rela.r_offset = (htab->plt->output_section->vma
8618 + htab->plt->output_offset
8619 + 2);
8620 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8621 rela.r_addend = 0;
8622 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8623 loc += sizeof (Elf32_External_Rela);
8624
8625 /* Output the @l relocation for the second instruction. */
8626 rela.r_offset = (htab->plt->output_section->vma
8627 + htab->plt->output_offset
8628 + 6);
8629 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8630 rela.r_addend = 0;
8631 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8632 loc += sizeof (Elf32_External_Rela);
8633
8634 /* Fix up the remaining relocations. They may have the wrong
8635 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8636 in which symbols were output. */
8637 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8638 {
8639 Elf_Internal_Rela rel;
8640
8641 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8642 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8643 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8644 loc += sizeof (Elf32_External_Rela);
8645
8646 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8647 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8648 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8649 loc += sizeof (Elf32_External_Rela);
8650
8651 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8652 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8653 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8654 loc += sizeof (Elf32_External_Rela);
8655 }
8656 }
8657 }
8658
8659 if (htab->glink != NULL
8660 && htab->glink->contents != NULL
8661 && htab->elf.dynamic_sections_created)
8662 {
8663 unsigned char *p;
8664 unsigned char *endp;
8665 bfd_vma res0;
8666 unsigned int i;
8667
8668 /*
8669 * PIC glink code is the following:
8670 *
8671 * # ith PLT code stub.
8672 * addis 11,30,(plt+(i-1)*4-got)@ha
8673 * lwz 11,(plt+(i-1)*4-got)@l(11)
8674 * mtctr 11
8675 * bctr
8676 *
8677 * # A table of branches, one for each plt entry.
8678 * # The idea is that the plt call stub loads ctr and r11 with these
8679 * # addresses, so (r11 - res_0) gives the plt index * 4.
8680 * res_0: b PLTresolve
8681 * res_1: b PLTresolve
8682 * .
8683 * # Some number of entries towards the end can be nops
8684 * res_n_m3: nop
8685 * res_n_m2: nop
8686 * res_n_m1:
8687 *
8688 * PLTresolve:
8689 * addis 11,11,(1f-res_0)@ha
8690 * mflr 0
8691 * bcl 20,31,1f
8692 * 1: addi 11,11,(1b-res_0)@l
8693 * mflr 12
8694 * mtlr 0
8695 * sub 11,11,12 # r11 = index * 4
8696 * addis 12,12,(got+4-1b)@ha
8697 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8698 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8699 * mtctr 0
8700 * add 0,11,11
8701 * add 11,0,11 # r11 = index * 12 = reloc offset.
8702 * bctr
8703 */
8704 static const unsigned int pic_plt_resolve[] =
8705 {
8706 ADDIS_11_11,
8707 MFLR_0,
8708 BCL_20_31,
8709 ADDI_11_11,
8710 MFLR_12,
8711 MTLR_0,
8712 SUB_11_11_12,
8713 ADDIS_12_12,
8714 LWZ_0_12,
8715 LWZ_12_12,
8716 MTCTR_0,
8717 ADD_0_11_11,
8718 ADD_11_0_11,
8719 BCTR,
8720 NOP,
8721 NOP
8722 };
8723
8724 /*
8725 * Non-PIC glink code is a little simpler.
8726 *
8727 * # ith PLT code stub.
8728 * lis 11,(plt+(i-1)*4)@ha
8729 * lwz 11,(plt+(i-1)*4)@l(11)
8730 * mtctr 11
8731 * bctr
8732 *
8733 * The branch table is the same, then comes
8734 *
8735 * PLTresolve:
8736 * lis 12,(got+4)@ha
8737 * addis 11,11,(-res_0)@ha
8738 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8739 * addi 11,11,(-res_0)@l # r11 = index * 4
8740 * mtctr 0
8741 * add 0,11,11
8742 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8743 * add 11,0,11 # r11 = index * 12 = reloc offset.
8744 * bctr
8745 */
8746 static const unsigned int plt_resolve[] =
8747 {
8748 LIS_12,
8749 ADDIS_11_11,
8750 LWZ_0_12,
8751 ADDI_11_11,
8752 MTCTR_0,
8753 ADD_0_11_11,
8754 LWZ_12_12,
8755 ADD_11_0_11,
8756 BCTR,
8757 NOP,
8758 NOP,
8759 NOP,
8760 NOP,
8761 NOP,
8762 NOP,
8763 NOP
8764 };
8765
8766 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8767 abort ();
8768 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8769 abort ();
8770
8771 /* Build the branch table, one for each plt entry (less one),
8772 and perhaps some padding. */
8773 p = htab->glink->contents;
8774 p += htab->glink_pltresolve;
8775 endp = htab->glink->contents;
8776 endp += htab->glink->size - GLINK_PLTRESOLVE;
8777 while (p < endp - 8 * 4)
8778 {
8779 bfd_put_32 (output_bfd, B + endp - p, p);
8780 p += 4;
8781 }
8782 while (p < endp)
8783 {
8784 bfd_put_32 (output_bfd, NOP, p);
8785 p += 4;
8786 }
8787
8788 res0 = (htab->glink_pltresolve
8789 + htab->glink->output_section->vma
8790 + htab->glink->output_offset);
8791
8792 /* Last comes the PLTresolve stub. */
8793 if (info->shared)
8794 {
8795 bfd_vma bcl;
8796
8797 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8798 {
8799 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8800 p += 4;
8801 }
8802 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8803
8804 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8805 + htab->glink->output_section->vma
8806 + htab->glink->output_offset);
8807
8808 bfd_put_32 (output_bfd,
8809 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8810 bfd_put_32 (output_bfd,
8811 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8812 bfd_put_32 (output_bfd,
8813 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8814 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8815 {
8816 bfd_put_32 (output_bfd,
8817 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8818 bfd_put_32 (output_bfd,
8819 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8820 }
8821 else
8822 {
8823 bfd_put_32 (output_bfd,
8824 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8825 bfd_put_32 (output_bfd,
8826 LWZ_12_12 + 4, p + 9*4);
8827 }
8828 }
8829 else
8830 {
8831 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8832 {
8833 bfd_put_32 (output_bfd, plt_resolve[i], p);
8834 p += 4;
8835 }
8836 p -= 4 * ARRAY_SIZE (plt_resolve);
8837
8838 bfd_put_32 (output_bfd,
8839 LIS_12 + PPC_HA (got + 4), p + 0*4);
8840 bfd_put_32 (output_bfd,
8841 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8842 bfd_put_32 (output_bfd,
8843 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8844 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8845 {
8846 bfd_put_32 (output_bfd,
8847 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8848 bfd_put_32 (output_bfd,
8849 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8850 }
8851 else
8852 {
8853 bfd_put_32 (output_bfd,
8854 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8855 bfd_put_32 (output_bfd,
8856 LWZ_12_12 + 4, p + 6*4);
8857 }
8858 }
8859 }
8860
8861 return ret;
8862 }
8863 \f
8864 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8865 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8866 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8867 #define TARGET_BIG_NAME "elf32-powerpc"
8868 #define ELF_ARCH bfd_arch_powerpc
8869 #define ELF_MACHINE_CODE EM_PPC
8870 #ifdef __QNXTARGET__
8871 #define ELF_MAXPAGESIZE 0x1000
8872 #else
8873 #define ELF_MAXPAGESIZE 0x10000
8874 #endif
8875 #define ELF_MINPAGESIZE 0x1000
8876 #define ELF_COMMONPAGESIZE 0x1000
8877 #define elf_info_to_howto ppc_elf_info_to_howto
8878
8879 #ifdef EM_CYGNUS_POWERPC
8880 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8881 #endif
8882
8883 #ifdef EM_PPC_OLD
8884 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8885 #endif
8886
8887 #define elf_backend_plt_not_loaded 1
8888 #define elf_backend_can_gc_sections 1
8889 #define elf_backend_can_refcount 1
8890 #define elf_backend_rela_normal 1
8891
8892 #define bfd_elf32_mkobject ppc_elf_mkobject
8893 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8894 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8895 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8896 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8897 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8898 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8899 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8900
8901 #define elf_backend_object_p ppc_elf_object_p
8902 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8903 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8904 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8905 #define elf_backend_relocate_section ppc_elf_relocate_section
8906 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8907 #define elf_backend_check_relocs ppc_elf_check_relocs
8908 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8909 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8910 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8911 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8912 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8913 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8914 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8915 #define elf_backend_fake_sections ppc_elf_fake_sections
8916 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8917 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8918 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8919 #define elf_backend_write_core_note ppc_elf_write_core_note
8920 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8921 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8922 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8923 #define elf_backend_write_section ppc_elf_write_section
8924 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8925 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8926 #define elf_backend_action_discarded ppc_elf_action_discarded
8927 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8928 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8929
8930 #include "elf32-target.h"
8931
8932 /* VxWorks Target */
8933
8934 #undef TARGET_LITTLE_SYM
8935 #undef TARGET_LITTLE_NAME
8936
8937 #undef TARGET_BIG_SYM
8938 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8939 #undef TARGET_BIG_NAME
8940 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8941
8942 /* VxWorks uses the elf default section flags for .plt. */
8943 static const struct bfd_elf_special_section *
8944 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8945 {
8946 if (sec->name == NULL)
8947 return NULL;
8948
8949 if (strcmp (sec->name, ".plt") == 0)
8950 return _bfd_elf_get_sec_type_attr (abfd, sec);
8951
8952 return ppc_elf_get_sec_type_attr (abfd, sec);
8953 }
8954
8955 /* Like ppc_elf_link_hash_table_create, but overrides
8956 appropriately for VxWorks. */
8957 static struct bfd_link_hash_table *
8958 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8959 {
8960 struct bfd_link_hash_table *ret;
8961
8962 ret = ppc_elf_link_hash_table_create (abfd);
8963 if (ret)
8964 {
8965 struct ppc_elf_link_hash_table *htab
8966 = (struct ppc_elf_link_hash_table *)ret;
8967 htab->is_vxworks = 1;
8968 htab->plt_type = PLT_VXWORKS;
8969 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8970 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8971 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8972 }
8973 return ret;
8974 }
8975
8976 /* Tweak magic VxWorks symbols as they are loaded. */
8977 static bfd_boolean
8978 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8979 struct bfd_link_info *info,
8980 Elf_Internal_Sym *sym,
8981 const char **namep ATTRIBUTE_UNUSED,
8982 flagword *flagsp ATTRIBUTE_UNUSED,
8983 asection **secp,
8984 bfd_vma *valp)
8985 {
8986 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8987 valp))
8988 return FALSE;
8989
8990 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8991 }
8992
8993 static void
8994 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8995 {
8996 ppc_elf_final_write_processing(abfd, linker);
8997 elf_vxworks_final_write_processing(abfd, linker);
8998 }
8999
9000 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9001 define it. */
9002 #undef elf_backend_want_plt_sym
9003 #define elf_backend_want_plt_sym 1
9004 #undef elf_backend_want_got_plt
9005 #define elf_backend_want_got_plt 1
9006 #undef elf_backend_got_symbol_offset
9007 #define elf_backend_got_symbol_offset 0
9008 #undef elf_backend_plt_not_loaded
9009 #define elf_backend_plt_not_loaded 0
9010 #undef elf_backend_plt_readonly
9011 #define elf_backend_plt_readonly 1
9012 #undef elf_backend_got_header_size
9013 #define elf_backend_got_header_size 12
9014
9015 #undef bfd_elf32_get_synthetic_symtab
9016
9017 #undef bfd_elf32_bfd_link_hash_table_create
9018 #define bfd_elf32_bfd_link_hash_table_create \
9019 ppc_elf_vxworks_link_hash_table_create
9020 #undef elf_backend_add_symbol_hook
9021 #define elf_backend_add_symbol_hook \
9022 ppc_elf_vxworks_add_symbol_hook
9023 #undef elf_backend_link_output_symbol_hook
9024 #define elf_backend_link_output_symbol_hook \
9025 elf_vxworks_link_output_symbol_hook
9026 #undef elf_backend_final_write_processing
9027 #define elf_backend_final_write_processing \
9028 ppc_elf_vxworks_final_write_processing
9029 #undef elf_backend_get_sec_type_attr
9030 #define elf_backend_get_sec_type_attr \
9031 ppc_elf_vxworks_get_sec_type_attr
9032 #undef elf_backend_emit_relocs
9033 #define elf_backend_emit_relocs \
9034 elf_vxworks_emit_relocs
9035
9036 #undef elf32_bed
9037 #define elf32_bed ppc_elf_vxworks_bed
9038 #undef elf_backend_post_process_headers
9039
9040 #include "elf32-target.h"
GDB Binutils - Deliverables
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