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2011-07-29 Tristan Gingold <gingold@adacore.com>
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39
40 /* RELA relocations are used here. */
41
42 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc_elf_unhandled_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46
47 /* Branch prediction bit for branch taken relocs. */
48 #define BRANCH_PREDICT_BIT 0x200000
49 /* Mask to set RA in memory instructions. */
50 #define RA_REGISTER_MASK 0x001f0000
51 /* Value to shift register by to insert RA. */
52 #define RA_REGISTER_SHIFT 16
53
54 /* The name of the dynamic interpreter. This is put in the .interp
55 section. */
56 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
57
58 /* For old-style PLT. */
59 /* The number of single-slot PLT entries (the rest use two slots). */
60 #define PLT_NUM_SINGLE_ENTRIES 8192
61
62 /* For new-style .glink and .plt. */
63 #define GLINK_PLTRESOLVE 16*4
64 #define GLINK_ENTRY_SIZE 4*4
65 #define TLS_GET_ADDR_GLINK_SIZE 12*4
66
67 /* VxWorks uses its own plt layout, filled in by the static linker. */
68
69 /* The standard VxWorks PLT entry. */
70 #define VXWORKS_PLT_ENTRY_SIZE 32
71 static const bfd_vma ppc_elf_vxworks_plt_entry
72 [VXWORKS_PLT_ENTRY_SIZE / 4] =
73 {
74 0x3d800000, /* lis r12,0 */
75 0x818c0000, /* lwz r12,0(r12) */
76 0x7d8903a6, /* mtctr r12 */
77 0x4e800420, /* bctr */
78 0x39600000, /* li r11,0 */
79 0x48000000, /* b 14 <.PLT0resolve+0x4> */
80 0x60000000, /* nop */
81 0x60000000, /* nop */
82 };
83 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d9e0000, /* addis r12,r30,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95
96 /* The initial VxWorks PLT entry. */
97 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
98 static const bfd_vma ppc_elf_vxworks_plt0_entry
99 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
100 {
101 0x3d800000, /* lis r12,0 */
102 0x398c0000, /* addi r12,r12,0 */
103 0x800c0008, /* lwz r0,8(r12) */
104 0x7c0903a6, /* mtctr r0 */
105 0x818c0004, /* lwz r12,4(r12) */
106 0x4e800420, /* bctr */
107 0x60000000, /* nop */
108 0x60000000, /* nop */
109 };
110 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x819e0008, /* lwz r12,8(r30) */
114 0x7d8903a6, /* mtctr r12 */
115 0x819e0004, /* lwz r12,4(r30) */
116 0x4e800420, /* bctr */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122
123 /* For executables, we have some additional relocations in
124 .rela.plt.unloaded, for the kernel loader. */
125
126 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
127 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
128 /* The number of relocations in the PLTResolve slot. */
129 #define VXWORKS_PLTRESOLVE_RELOCS 2
130 /* The number of relocations in the PLTResolve slot when when creating
131 a shared library. */
132 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
133
134 /* Some instructions. */
135 #define ADDIS_11_11 0x3d6b0000
136 #define ADDIS_11_30 0x3d7e0000
137 #define ADDIS_12_12 0x3d8c0000
138 #define ADDI_11_11 0x396b0000
139 #define ADD_0_11_11 0x7c0b5a14
140 #define ADD_3_12_2 0x7c6c1214
141 #define ADD_11_0_11 0x7d605a14
142 #define B 0x48000000
143 #define BCL_20_31 0x429f0005
144 #define BCTR 0x4e800420
145 #define BEQLR 0x4d820020
146 #define CMPWI_11_0 0x2c0b0000
147 #define LIS_11 0x3d600000
148 #define LIS_12 0x3d800000
149 #define LWZU_0_12 0x840c0000
150 #define LWZ_0_12 0x800c0000
151 #define LWZ_11_3 0x81630000
152 #define LWZ_11_11 0x816b0000
153 #define LWZ_11_30 0x817e0000
154 #define LWZ_12_3 0x81830000
155 #define LWZ_12_12 0x818c0000
156 #define MR_0_3 0x7c601b78
157 #define MR_3_0 0x7c030378
158 #define MFLR_0 0x7c0802a6
159 #define MFLR_12 0x7d8802a6
160 #define MTCTR_0 0x7c0903a6
161 #define MTCTR_11 0x7d6903a6
162 #define MTLR_0 0x7c0803a6
163 #define NOP 0x60000000
164 #define SUB_11_11_12 0x7d6c5850
165
166 /* Offset of tp and dtp pointers from start of TLS block. */
167 #define TP_OFFSET 0x7000
168 #define DTP_OFFSET 0x8000
169
170 /* The value of a defined global symbol. */
171 #define SYM_VAL(SYM) \
172 ((SYM)->root.u.def.section->output_section->vma \
173 + (SYM)->root.u.def.section->output_offset \
174 + (SYM)->root.u.def.value)
175 \f
176 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
177
178 static reloc_howto_type ppc_elf_howto_raw[] = {
179 /* This reloc does nothing. */
180 HOWTO (R_PPC_NONE, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_NONE", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* A standard 32 bit relocation. */
195 HOWTO (R_PPC_ADDR32, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 32, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_bitfield, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_PPC_ADDR32", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0xffffffff, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 /* An absolute 26 bit branch; the lower two bits must be zero.
210 FIXME: we don't check that, we just clear them. */
211 HOWTO (R_PPC_ADDR24, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 26, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR24", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0x3fffffc, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A standard 16 bit relocation. */
226 HOWTO (R_PPC_ADDR16, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_bitfield, /* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* A 16 bit relocation without overflow. */
241 HOWTO (R_PPC_ADDR16_LO, /* type */
242 0, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont,/* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_LO", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address. */
256 HOWTO (R_PPC_ADDR16_HI, /* type */
257 16, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_PPC_ADDR16_HI", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* The high order 16 bits of an address, plus 1 if the contents of
271 the low 16 bits, treated as a signed number, is negative. */
272 HOWTO (R_PPC_ADDR16_HA, /* type */
273 16, /* rightshift */
274 1, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_dont, /* complain_on_overflow */
279 ppc_elf_addr16_ha_reloc, /* special_function */
280 "R_PPC_ADDR16_HA", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0xffff, /* dst_mask */
284 FALSE), /* pcrel_offset */
285
286 /* An absolute 16 bit branch; the lower two bits must be zero.
287 FIXME: we don't check that, we just clear them. */
288 HOWTO (R_PPC_ADDR14, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is expected to be taken. The lower two
304 bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* An absolute 16 bit branch, for which bit 10 should be set to
320 indicate that the branch is not expected to be taken. The lower
321 two bits must be zero. */
322 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_ADDR14_BRNTAKEN",/* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xfffc, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* A relative 26 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL24, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 26, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL24", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x3fffffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch; the lower two bits must be zero. */
352 HOWTO (R_PPC_REL14, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is expected to be taken. The lower two bits must be
368 zero. */
369 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRTAKEN", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* A relative 16 bit branch. Bit 10 should be set to indicate that
384 the branch is not expected to be taken. The lower two bits must
385 be zero. */
386 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 TRUE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_PPC_REL14_BRNTAKEN",/* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0xfffc, /* dst_mask */
398 TRUE), /* pcrel_offset */
399
400 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
401 symbol. */
402 HOWTO (R_PPC_GOT16, /* type */
403 0, /* rightshift */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 FALSE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 bfd_elf_generic_reloc, /* special_function */
410 "R_PPC_GOT16", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0xffff, /* dst_mask */
414 FALSE), /* pcrel_offset */
415
416 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
417 the symbol. */
418 HOWTO (R_PPC_GOT16_LO, /* type */
419 0, /* rightshift */
420 1, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_dont, /* complain_on_overflow */
425 bfd_elf_generic_reloc, /* special_function */
426 "R_PPC_GOT16_LO", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0xffff, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
433 the symbol. */
434 HOWTO (R_PPC_GOT16_HI, /* type */
435 16, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_bitfield, /* complain_on_overflow */
441 bfd_elf_generic_reloc, /* special_function */
442 "R_PPC_GOT16_HI", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
449 the symbol. */
450 HOWTO (R_PPC_GOT16_HA, /* type */
451 16, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield, /* complain_on_overflow */
457 ppc_elf_addr16_ha_reloc, /* special_function */
458 "R_PPC_GOT16_HA", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 /* Like R_PPC_REL24, but referring to the procedure linkage table
465 entry for the symbol. */
466 HOWTO (R_PPC_PLTREL24, /* type */
467 0, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 26, /* bitsize */
470 TRUE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_signed, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_PPC_PLTREL24", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0x3fffffc, /* dst_mask */
478 TRUE), /* pcrel_offset */
479
480 /* This is used only by the dynamic linker. The symbol should exist
481 both in the object being run and in some shared library. The
482 dynamic linker copies the data addressed by the symbol from the
483 shared library into the object, because the object being
484 run has to have the data at some particular address. */
485 HOWTO (R_PPC_COPY, /* type */
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 32, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_bitfield, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_PPC_COPY", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Like R_PPC_ADDR32, but used when setting global offset table
500 entries. */
501 HOWTO (R_PPC_GLOB_DAT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_GLOB_DAT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0xffffffff, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Marks a procedure linkage table entry for a symbol. */
516 HOWTO (R_PPC_JMP_SLOT, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_JMP_SLOT", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Used only by the dynamic linker. When the object is run, this
531 longword is set to the load address of the object, plus the
532 addend. */
533 HOWTO (R_PPC_RELATIVE, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 32, /* bitsize */
537 FALSE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_bitfield, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_RELATIVE", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0xffffffff, /* dst_mask */
545 FALSE), /* pcrel_offset */
546
547 /* Like R_PPC_REL24, but uses the value of the symbol within the
548 object rather than the final value. Normally used for
549 _GLOBAL_OFFSET_TABLE_. */
550 HOWTO (R_PPC_LOCAL24PC, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 26, /* bitsize */
554 TRUE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_signed, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_LOCAL24PC", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0x3fffffc, /* dst_mask */
562 TRUE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR32, but may be unaligned. */
565 HOWTO (R_PPC_UADDR32, /* type */
566 0, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 32, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR32", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffffffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC_ADDR16, but may be unaligned. */
580 HOWTO (R_PPC_UADDR16, /* type */
581 0, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_UADDR16", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* 32-bit PC relative */
595 HOWTO (R_PPC_REL32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 TRUE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_bitfield, /* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_PPC_REL32", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0xffffffff, /* dst_mask */
607 TRUE), /* pcrel_offset */
608
609 /* 32-bit relocation to the symbol's procedure linkage table.
610 FIXME: not supported. */
611 HOWTO (R_PPC_PLT32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC_PLT32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0, /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
626 FIXME: not supported. */
627 HOWTO (R_PPC_PLTREL32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 TRUE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC_PLTREL32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0, /* dst_mask */
639 TRUE), /* pcrel_offset */
640
641 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC_PLT16_LO, /* type */
644 0, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont, /* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_PPC_PLT16_LO", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC_PLT16_HI, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_bitfield, /* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 "R_PPC_PLT16_HI", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
674 the symbol. */
675 HOWTO (R_PPC_PLT16_HA, /* type */
676 16, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_bitfield, /* complain_on_overflow */
682 ppc_elf_addr16_ha_reloc, /* special_function */
683 "R_PPC_PLT16_HA", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
690 small data items. */
691 HOWTO (R_PPC_SDAREL16, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_signed, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SDAREL16", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit section relative relocation. */
706 HOWTO (R_PPC_SECTOFF, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_bitfield, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit lower half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_LO, /* type */
722 0, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_dont, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_LO", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HI, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_PPC_SECTOFF_HI", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit upper half adjusted section relative relocation. */
751 HOWTO (R_PPC_SECTOFF_HA, /* type */
752 16, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_bitfield, /* complain_on_overflow */
758 ppc_elf_addr16_ha_reloc, /* special_function */
759 "R_PPC_SECTOFF_HA", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Marker relocs for TLS. */
766 HOWTO (R_PPC_TLS,
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC_TLS", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 HOWTO (R_PPC_TLSGD,
781 0, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 32, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_dont, /* complain_on_overflow */
787 bfd_elf_generic_reloc, /* special_function */
788 "R_PPC_TLSGD", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 HOWTO (R_PPC_TLSLD,
795 0, /* rightshift */
796 2, /* size (0 = byte, 1 = short, 2 = long) */
797 32, /* bitsize */
798 FALSE, /* pc_relative */
799 0, /* bitpos */
800 complain_overflow_dont, /* complain_on_overflow */
801 bfd_elf_generic_reloc, /* special_function */
802 "R_PPC_TLSLD", /* name */
803 FALSE, /* partial_inplace */
804 0, /* src_mask */
805 0, /* dst_mask */
806 FALSE), /* pcrel_offset */
807
808 /* Computes the load module index of the load module that contains the
809 definition of its TLS sym. */
810 HOWTO (R_PPC_DTPMOD32,
811 0, /* rightshift */
812 2, /* size (0 = byte, 1 = short, 2 = long) */
813 32, /* bitsize */
814 FALSE, /* pc_relative */
815 0, /* bitpos */
816 complain_overflow_dont, /* complain_on_overflow */
817 ppc_elf_unhandled_reloc, /* special_function */
818 "R_PPC_DTPMOD32", /* name */
819 FALSE, /* partial_inplace */
820 0, /* src_mask */
821 0xffffffff, /* dst_mask */
822 FALSE), /* pcrel_offset */
823
824 /* Computes a dtv-relative displacement, the difference between the value
825 of sym+add and the base address of the thread-local storage block that
826 contains the definition of sym, minus 0x8000. */
827 HOWTO (R_PPC_DTPREL32,
828 0, /* rightshift */
829 2, /* size (0 = byte, 1 = short, 2 = long) */
830 32, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL32", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffffffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* A 16 bit dtprel reloc. */
842 HOWTO (R_PPC_DTPREL16,
843 0, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_signed, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Like DTPREL16, but no overflow. */
857 HOWTO (R_PPC_DTPREL16_LO,
858 0, /* rightshift */
859 1, /* size (0 = byte, 1 = short, 2 = long) */
860 16, /* bitsize */
861 FALSE, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_dont, /* complain_on_overflow */
864 ppc_elf_unhandled_reloc, /* special_function */
865 "R_PPC_DTPREL16_LO", /* name */
866 FALSE, /* partial_inplace */
867 0, /* src_mask */
868 0xffff, /* dst_mask */
869 FALSE), /* pcrel_offset */
870
871 /* Like DTPREL16_LO, but next higher group of 16 bits. */
872 HOWTO (R_PPC_DTPREL16_HI,
873 16, /* rightshift */
874 1, /* size (0 = byte, 1 = short, 2 = long) */
875 16, /* bitsize */
876 FALSE, /* pc_relative */
877 0, /* bitpos */
878 complain_overflow_dont, /* complain_on_overflow */
879 ppc_elf_unhandled_reloc, /* special_function */
880 "R_PPC_DTPREL16_HI", /* name */
881 FALSE, /* partial_inplace */
882 0, /* src_mask */
883 0xffff, /* dst_mask */
884 FALSE), /* pcrel_offset */
885
886 /* Like DTPREL16_HI, but adjust for low 16 bits. */
887 HOWTO (R_PPC_DTPREL16_HA,
888 16, /* rightshift */
889 1, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_dont, /* complain_on_overflow */
894 ppc_elf_unhandled_reloc, /* special_function */
895 "R_PPC_DTPREL16_HA", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0xffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* Computes a tp-relative displacement, the difference between the value of
902 sym+add and the value of the thread pointer (r13). */
903 HOWTO (R_PPC_TPREL32,
904 0, /* rightshift */
905 2, /* size (0 = byte, 1 = short, 2 = long) */
906 32, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL32", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffffffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* A 16 bit tprel reloc. */
918 HOWTO (R_PPC_TPREL16,
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Like TPREL16, but no overflow. */
933 HOWTO (R_PPC_TPREL16_LO,
934 0, /* rightshift */
935 1, /* size (0 = byte, 1 = short, 2 = long) */
936 16, /* bitsize */
937 FALSE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont, /* complain_on_overflow */
940 ppc_elf_unhandled_reloc, /* special_function */
941 "R_PPC_TPREL16_LO", /* name */
942 FALSE, /* partial_inplace */
943 0, /* src_mask */
944 0xffff, /* dst_mask */
945 FALSE), /* pcrel_offset */
946
947 /* Like TPREL16_LO, but next higher group of 16 bits. */
948 HOWTO (R_PPC_TPREL16_HI,
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc_elf_unhandled_reloc, /* special_function */
956 "R_PPC_TPREL16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* Like TPREL16_HI, but adjust for low 16 bits. */
963 HOWTO (R_PPC_TPREL16_HA,
964 16, /* rightshift */
965 1, /* size (0 = byte, 1 = short, 2 = long) */
966 16, /* bitsize */
967 FALSE, /* pc_relative */
968 0, /* bitpos */
969 complain_overflow_dont, /* complain_on_overflow */
970 ppc_elf_unhandled_reloc, /* special_function */
971 "R_PPC_TPREL16_HA", /* name */
972 FALSE, /* partial_inplace */
973 0, /* src_mask */
974 0xffff, /* dst_mask */
975 FALSE), /* pcrel_offset */
976
977 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
978 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
979 to the first entry. */
980 HOWTO (R_PPC_GOT_TLSGD16,
981 0, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_signed, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Like GOT_TLSGD16, but no overflow. */
995 HOWTO (R_PPC_GOT_TLSGD16_LO,
996 0, /* rightshift */
997 1, /* size (0 = byte, 1 = short, 2 = long) */
998 16, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_dont, /* complain_on_overflow */
1002 ppc_elf_unhandled_reloc, /* special_function */
1003 "R_PPC_GOT_TLSGD16_LO", /* name */
1004 FALSE, /* partial_inplace */
1005 0, /* src_mask */
1006 0xffff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1010 HOWTO (R_PPC_GOT_TLSGD16_HI,
1011 16, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc_elf_unhandled_reloc, /* special_function */
1018 "R_PPC_GOT_TLSGD16_HI", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1025 HOWTO (R_PPC_GOT_TLSGD16_HA,
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc_elf_unhandled_reloc, /* special_function */
1033 "R_PPC_GOT_TLSGD16_HA", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1040 with values (sym+add)@dtpmod and zero, and computes the offset to the
1041 first entry. */
1042 HOWTO (R_PPC_GOT_TLSLD16,
1043 0, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_signed, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Like GOT_TLSLD16, but no overflow. */
1057 HOWTO (R_PPC_GOT_TLSLD16_LO,
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont, /* complain_on_overflow */
1064 ppc_elf_unhandled_reloc, /* special_function */
1065 "R_PPC_GOT_TLSLD16_LO", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1072 HOWTO (R_PPC_GOT_TLSLD16_HI,
1073 16, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_dont, /* complain_on_overflow */
1079 ppc_elf_unhandled_reloc, /* special_function */
1080 "R_PPC_GOT_TLSLD16_HI", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xffff, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1087 HOWTO (R_PPC_GOT_TLSLD16_HA,
1088 16, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont, /* complain_on_overflow */
1094 ppc_elf_unhandled_reloc, /* special_function */
1095 "R_PPC_GOT_TLSLD16_HA", /* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xffff, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1102 the offset to the entry. */
1103 HOWTO (R_PPC_GOT_DTPREL16,
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like GOT_DTPREL16, but no overflow. */
1118 HOWTO (R_PPC_GOT_DTPREL16_LO,
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc_elf_unhandled_reloc, /* special_function */
1126 "R_PPC_GOT_DTPREL16_LO", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xffff, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1133 HOWTO (R_PPC_GOT_DTPREL16_HI,
1134 16, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc_elf_unhandled_reloc, /* special_function */
1141 "R_PPC_GOT_DTPREL16_HI", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xffff, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1148 HOWTO (R_PPC_GOT_DTPREL16_HA,
1149 16, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_dont, /* complain_on_overflow */
1155 ppc_elf_unhandled_reloc, /* special_function */
1156 "R_PPC_GOT_DTPREL16_HA", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xffff, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1163 offset to the entry. */
1164 HOWTO (R_PPC_GOT_TPREL16,
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like GOT_TPREL16, but no overflow. */
1179 HOWTO (R_PPC_GOT_TPREL16_LO,
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc_elf_unhandled_reloc, /* special_function */
1187 "R_PPC_GOT_TPREL16_LO", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xffff, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1194 HOWTO (R_PPC_GOT_TPREL16_HI,
1195 16, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc_elf_unhandled_reloc, /* special_function */
1202 "R_PPC_GOT_TPREL16_HI", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xffff, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1209 HOWTO (R_PPC_GOT_TPREL16_HA,
1210 16, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_dont, /* complain_on_overflow */
1216 ppc_elf_unhandled_reloc, /* special_function */
1217 "R_PPC_GOT_TPREL16_HA", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xffff, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* The remaining relocs are from the Embedded ELF ABI, and are not
1224 in the SVR4 ELF ABI. */
1225
1226 /* 32 bit value resulting from the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR32, /* type */
1228 0, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 32, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_bitfield, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR32", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* 16 bit value resulting from the addend minus the symbol. */
1242 HOWTO (R_PPC_EMB_NADDR16, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_bitfield, /* complain_on_overflow */
1249 bfd_elf_generic_reloc, /* special_function */
1250 "R_PPC_EMB_NADDR16", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xffff, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* 16 bit value resulting from the addend minus the symbol. */
1257 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1258 0, /* rightshift */
1259 1, /* size (0 = byte, 1 = short, 2 = long) */
1260 16, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont,/* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC_EMB_ADDR16_LO", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0xffff, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 /* The high order 16 bits of the addend minus the symbol. */
1272 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1273 16, /* rightshift */
1274 1, /* size (0 = byte, 1 = short, 2 = long) */
1275 16, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 bfd_elf_generic_reloc, /* special_function */
1280 "R_PPC_EMB_NADDR16_HI", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 0xffff, /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* The high order 16 bits of the result of the addend minus the address,
1287 plus 1 if the contents of the low 16 bits, treated as a signed number,
1288 is negative. */
1289 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1290 16, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc_elf_addr16_ha_reloc, /* special_function */
1297 "R_PPC_EMB_NADDR16_HA", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* 16 bit value resulting from allocating a 4 byte word to hold an
1304 address in the .sdata section, and returning the offset from
1305 _SDA_BASE_ for that relocation. */
1306 HOWTO (R_PPC_EMB_SDAI16, /* type */
1307 0, /* rightshift */
1308 1, /* size (0 = byte, 1 = short, 2 = long) */
1309 16, /* bitsize */
1310 FALSE, /* pc_relative */
1311 0, /* bitpos */
1312 complain_overflow_signed, /* complain_on_overflow */
1313 bfd_elf_generic_reloc, /* special_function */
1314 "R_PPC_EMB_SDAI16", /* name */
1315 FALSE, /* partial_inplace */
1316 0, /* src_mask */
1317 0xffff, /* dst_mask */
1318 FALSE), /* pcrel_offset */
1319
1320 /* 16 bit value resulting from allocating a 4 byte word to hold an
1321 address in the .sdata2 section, and returning the offset from
1322 _SDA2_BASE_ for that relocation. */
1323 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1324 0, /* rightshift */
1325 1, /* size (0 = byte, 1 = short, 2 = long) */
1326 16, /* bitsize */
1327 FALSE, /* pc_relative */
1328 0, /* bitpos */
1329 complain_overflow_signed, /* complain_on_overflow */
1330 bfd_elf_generic_reloc, /* special_function */
1331 "R_PPC_EMB_SDA2I16", /* name */
1332 FALSE, /* partial_inplace */
1333 0, /* src_mask */
1334 0xffff, /* dst_mask */
1335 FALSE), /* pcrel_offset */
1336
1337 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1338 small data items. */
1339 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1340 0, /* rightshift */
1341 1, /* size (0 = byte, 1 = short, 2 = long) */
1342 16, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_signed, /* complain_on_overflow */
1346 bfd_elf_generic_reloc, /* special_function */
1347 "R_PPC_EMB_SDA2REL", /* name */
1348 FALSE, /* partial_inplace */
1349 0, /* src_mask */
1350 0xffff, /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1354 signed offset from the appropriate base, and filling in the register
1355 field with the appropriate register (0, 2, or 13). */
1356 HOWTO (R_PPC_EMB_SDA21, /* type */
1357 0, /* rightshift */
1358 2, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_signed, /* complain_on_overflow */
1363 bfd_elf_generic_reloc, /* special_function */
1364 "R_PPC_EMB_SDA21", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Relocation not handled: R_PPC_EMB_MRKREF */
1371 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1372 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1373 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1374 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1375 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1376
1377 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1378 in the 16 bit signed offset from the appropriate base, and filling in the
1379 register field with the appropriate register (0, 2, or 13). */
1380 HOWTO (R_PPC_EMB_RELSDA, /* type */
1381 0, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_signed, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_EMB_RELSDA", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 HOWTO (R_PPC_IRELATIVE, /* type */
1395 0, /* rightshift */
1396 2, /* size (0 = byte, 1 = short, 2 = long) */
1397 32, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_bitfield, /* complain_on_overflow */
1401 bfd_elf_generic_reloc, /* special_function */
1402 "R_PPC_IRELATIVE", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffffffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* A 16 bit relative relocation. */
1409 HOWTO (R_PPC_REL16, /* type */
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 TRUE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_bitfield, /* complain_on_overflow */
1416 bfd_elf_generic_reloc, /* special_function */
1417 "R_PPC_REL16", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 TRUE), /* pcrel_offset */
1422
1423 /* A 16 bit relative relocation without overflow. */
1424 HOWTO (R_PPC_REL16_LO, /* type */
1425 0, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 TRUE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont,/* complain_on_overflow */
1431 bfd_elf_generic_reloc, /* special_function */
1432 "R_PPC_REL16_LO", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 TRUE), /* pcrel_offset */
1437
1438 /* The high order 16 bits of a relative address. */
1439 HOWTO (R_PPC_REL16_HI, /* type */
1440 16, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 TRUE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 bfd_elf_generic_reloc, /* special_function */
1447 "R_PPC_REL16_HI", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 TRUE), /* pcrel_offset */
1452
1453 /* The high order 16 bits of a relative address, plus 1 if the contents of
1454 the low 16 bits, treated as a signed number, is negative. */
1455 HOWTO (R_PPC_REL16_HA, /* type */
1456 16, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 TRUE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc_elf_addr16_ha_reloc, /* special_function */
1463 "R_PPC_REL16_HA", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 TRUE), /* pcrel_offset */
1468
1469 /* GNU extension to record C++ vtable hierarchy. */
1470 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1471 0, /* rightshift */
1472 0, /* size (0 = byte, 1 = short, 2 = long) */
1473 0, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 NULL, /* special_function */
1478 "R_PPC_GNU_VTINHERIT", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* GNU extension to record C++ vtable member usage. */
1485 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1486 0, /* rightshift */
1487 0, /* size (0 = byte, 1 = short, 2 = long) */
1488 0, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 NULL, /* special_function */
1493 "R_PPC_GNU_VTENTRY", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Phony reloc to handle AIX style TOC entries. */
1500 HOWTO (R_PPC_TOC16, /* type */
1501 0, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_signed, /* complain_on_overflow */
1507 bfd_elf_generic_reloc, /* special_function */
1508 "R_PPC_TOC16", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513 };
1514 \f
1515 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1516
1517 static void
1518 ppc_elf_howto_init (void)
1519 {
1520 unsigned int i, type;
1521
1522 for (i = 0;
1523 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1524 i++)
1525 {
1526 type = ppc_elf_howto_raw[i].type;
1527 if (type >= (sizeof (ppc_elf_howto_table)
1528 / sizeof (ppc_elf_howto_table[0])))
1529 abort ();
1530 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1531 }
1532 }
1533
1534 static reloc_howto_type *
1535 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1536 bfd_reloc_code_real_type code)
1537 {
1538 enum elf_ppc_reloc_type r;
1539
1540 /* Initialize howto table if not already done. */
1541 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1542 ppc_elf_howto_init ();
1543
1544 switch (code)
1545 {
1546 default:
1547 return NULL;
1548
1549 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1550 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1551 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1552 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1553 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1554 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1555 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1556 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1557 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1558 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1559 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1560 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1561 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1562 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1563 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1564 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1565 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1566 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1567 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1568 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1569 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1570 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1571 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1572 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1573 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1574 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1575 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1576 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1577 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1578 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1579 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1580 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1581 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1582 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1583 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1584 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1585 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1586 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1587 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1588 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1589 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1590 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1591 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1592 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1593 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1594 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1595 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1596 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1597 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1598 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1599 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1600 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1601 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1602 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1603 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1604 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1605 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1606 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1607 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1608 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1609 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1610 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1611 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1612 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1613 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1614 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1615 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1616 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1617 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1618 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1619 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1620 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1621 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1622 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1623 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1624 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1625 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1626 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1627 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1628 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1629 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1630 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1631 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1632 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1633 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1634 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1635 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1636 }
1637
1638 return ppc_elf_howto_table[r];
1639 };
1640
1641 static reloc_howto_type *
1642 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1643 const char *r_name)
1644 {
1645 unsigned int i;
1646
1647 for (i = 0;
1648 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1649 i++)
1650 if (ppc_elf_howto_raw[i].name != NULL
1651 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1652 return &ppc_elf_howto_raw[i];
1653
1654 return NULL;
1655 }
1656
1657 /* Set the howto pointer for a PowerPC ELF reloc. */
1658
1659 static void
1660 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1661 arelent *cache_ptr,
1662 Elf_Internal_Rela *dst)
1663 {
1664 /* Initialize howto table if not already done. */
1665 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1666 ppc_elf_howto_init ();
1667
1668 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1669 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1670
1671 /* Just because the above assert didn't trigger doesn't mean that
1672 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1673 if (!cache_ptr->howto)
1674 {
1675 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1676 abfd, ELF32_R_TYPE (dst->r_info));
1677 bfd_set_error (bfd_error_bad_value);
1678
1679 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1680 }
1681 }
1682
1683 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1684
1685 static bfd_reloc_status_type
1686 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1687 arelent *reloc_entry,
1688 asymbol *symbol,
1689 void *data ATTRIBUTE_UNUSED,
1690 asection *input_section,
1691 bfd *output_bfd,
1692 char **error_message ATTRIBUTE_UNUSED)
1693 {
1694 bfd_vma relocation;
1695
1696 if (output_bfd != NULL)
1697 {
1698 reloc_entry->address += input_section->output_offset;
1699 return bfd_reloc_ok;
1700 }
1701
1702 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1703 return bfd_reloc_outofrange;
1704
1705 if (bfd_is_com_section (symbol->section))
1706 relocation = 0;
1707 else
1708 relocation = symbol->value;
1709
1710 relocation += symbol->section->output_section->vma;
1711 relocation += symbol->section->output_offset;
1712 relocation += reloc_entry->addend;
1713 if (reloc_entry->howto->pc_relative)
1714 relocation -= reloc_entry->address;
1715
1716 reloc_entry->addend += (relocation & 0x8000) << 1;
1717
1718 return bfd_reloc_continue;
1719 }
1720
1721 static bfd_reloc_status_type
1722 ppc_elf_unhandled_reloc (bfd *abfd,
1723 arelent *reloc_entry,
1724 asymbol *symbol,
1725 void *data,
1726 asection *input_section,
1727 bfd *output_bfd,
1728 char **error_message)
1729 {
1730 /* If this is a relocatable link (output_bfd test tells us), just
1731 call the generic function. Any adjustment will be done at final
1732 link time. */
1733 if (output_bfd != NULL)
1734 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1735 input_section, output_bfd, error_message);
1736
1737 if (error_message != NULL)
1738 {
1739 static char buf[60];
1740 sprintf (buf, _("generic linker can't handle %s"),
1741 reloc_entry->howto->name);
1742 *error_message = buf;
1743 }
1744 return bfd_reloc_dangerous;
1745 }
1746 \f
1747 /* Sections created by the linker. */
1748
1749 typedef struct elf_linker_section
1750 {
1751 /* Pointer to the bfd section. */
1752 asection *section;
1753 /* Section name. */
1754 const char *name;
1755 /* Associated bss section name. */
1756 const char *bss_name;
1757 /* Associated symbol name. */
1758 const char *sym_name;
1759 /* Associated symbol. */
1760 struct elf_link_hash_entry *sym;
1761 } elf_linker_section_t;
1762
1763 /* Linked list of allocated pointer entries. This hangs off of the
1764 symbol lists, and provides allows us to return different pointers,
1765 based on different addend's. */
1766
1767 typedef struct elf_linker_section_pointers
1768 {
1769 /* next allocated pointer for this symbol */
1770 struct elf_linker_section_pointers *next;
1771 /* offset of pointer from beginning of section */
1772 bfd_vma offset;
1773 /* addend used */
1774 bfd_vma addend;
1775 /* which linker section this is */
1776 elf_linker_section_t *lsect;
1777 } elf_linker_section_pointers_t;
1778
1779 struct ppc_elf_obj_tdata
1780 {
1781 struct elf_obj_tdata elf;
1782
1783 /* A mapping from local symbols to offsets into the various linker
1784 sections added. This is index by the symbol index. */
1785 elf_linker_section_pointers_t **linker_section_pointers;
1786
1787 /* Flags used to auto-detect plt type. */
1788 unsigned int makes_plt_call : 1;
1789 unsigned int has_rel16 : 1;
1790 };
1791
1792 #define ppc_elf_tdata(bfd) \
1793 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1794
1795 #define elf_local_ptr_offsets(bfd) \
1796 (ppc_elf_tdata (bfd)->linker_section_pointers)
1797
1798 #define is_ppc_elf(bfd) \
1799 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1800 && elf_object_id (bfd) == PPC32_ELF_DATA)
1801
1802 /* Override the generic function because we store some extras. */
1803
1804 static bfd_boolean
1805 ppc_elf_mkobject (bfd *abfd)
1806 {
1807 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1808 PPC32_ELF_DATA);
1809 }
1810
1811 /* Fix bad default arch selected for a 32 bit input bfd when the
1812 default is 64 bit. */
1813
1814 static bfd_boolean
1815 ppc_elf_object_p (bfd *abfd)
1816 {
1817 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1818 {
1819 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1820
1821 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1822 {
1823 /* Relies on arch after 64 bit default being 32 bit default. */
1824 abfd->arch_info = abfd->arch_info->next;
1825 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1826 }
1827 }
1828 return TRUE;
1829 }
1830
1831 /* Function to set whether a module needs the -mrelocatable bit set. */
1832
1833 static bfd_boolean
1834 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1835 {
1836 BFD_ASSERT (!elf_flags_init (abfd)
1837 || elf_elfheader (abfd)->e_flags == flags);
1838
1839 elf_elfheader (abfd)->e_flags = flags;
1840 elf_flags_init (abfd) = TRUE;
1841 return TRUE;
1842 }
1843
1844 /* Support for core dump NOTE sections. */
1845
1846 static bfd_boolean
1847 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1848 {
1849 int offset;
1850 unsigned int size;
1851
1852 switch (note->descsz)
1853 {
1854 default:
1855 return FALSE;
1856
1857 case 268: /* Linux/PPC. */
1858 /* pr_cursig */
1859 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1860
1861 /* pr_pid */
1862 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
1863
1864 /* pr_reg */
1865 offset = 72;
1866 size = 192;
1867
1868 break;
1869 }
1870
1871 /* Make a ".reg/999" section. */
1872 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1873 size, note->descpos + offset);
1874 }
1875
1876 static bfd_boolean
1877 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1878 {
1879 switch (note->descsz)
1880 {
1881 default:
1882 return FALSE;
1883
1884 case 128: /* Linux/PPC elf_prpsinfo. */
1885 elf_tdata (abfd)->core_pid
1886 = bfd_get_32 (abfd, note->descdata + 16);
1887 elf_tdata (abfd)->core_program
1888 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1889 elf_tdata (abfd)->core_command
1890 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1891 }
1892
1893 /* Note that for some reason, a spurious space is tacked
1894 onto the end of the args in some (at least one anyway)
1895 implementations, so strip it off if it exists. */
1896
1897 {
1898 char *command = elf_tdata (abfd)->core_command;
1899 int n = strlen (command);
1900
1901 if (0 < n && command[n - 1] == ' ')
1902 command[n - 1] = '\0';
1903 }
1904
1905 return TRUE;
1906 }
1907
1908 static char *
1909 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1910 {
1911 switch (note_type)
1912 {
1913 default:
1914 return NULL;
1915
1916 case NT_PRPSINFO:
1917 {
1918 char data[128];
1919 va_list ap;
1920
1921 va_start (ap, note_type);
1922 memset (data, 0, 32);
1923 strncpy (data + 32, va_arg (ap, const char *), 16);
1924 strncpy (data + 48, va_arg (ap, const char *), 80);
1925 va_end (ap);
1926 return elfcore_write_note (abfd, buf, bufsiz,
1927 "CORE", note_type, data, sizeof (data));
1928 }
1929
1930 case NT_PRSTATUS:
1931 {
1932 char data[268];
1933 va_list ap;
1934 long pid;
1935 int cursig;
1936 const void *greg;
1937
1938 va_start (ap, note_type);
1939 memset (data, 0, 72);
1940 pid = va_arg (ap, long);
1941 bfd_put_32 (abfd, pid, data + 24);
1942 cursig = va_arg (ap, int);
1943 bfd_put_16 (abfd, cursig, data + 12);
1944 greg = va_arg (ap, const void *);
1945 memcpy (data + 72, greg, 192);
1946 memset (data + 264, 0, 4);
1947 va_end (ap);
1948 return elfcore_write_note (abfd, buf, bufsiz,
1949 "CORE", note_type, data, sizeof (data));
1950 }
1951 }
1952 }
1953
1954 /* Return address for Ith PLT stub in section PLT, for relocation REL
1955 or (bfd_vma) -1 if it should not be included. */
1956
1957 static bfd_vma
1958 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1959 const asection *plt ATTRIBUTE_UNUSED,
1960 const arelent *rel)
1961 {
1962 return rel->address;
1963 }
1964
1965 /* Handle a PowerPC specific section when reading an object file. This
1966 is called when bfd_section_from_shdr finds a section with an unknown
1967 type. */
1968
1969 static bfd_boolean
1970 ppc_elf_section_from_shdr (bfd *abfd,
1971 Elf_Internal_Shdr *hdr,
1972 const char *name,
1973 int shindex)
1974 {
1975 asection *newsect;
1976 flagword flags;
1977
1978 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1979 return FALSE;
1980
1981 newsect = hdr->bfd_section;
1982 flags = bfd_get_section_flags (abfd, newsect);
1983 if (hdr->sh_flags & SHF_EXCLUDE)
1984 flags |= SEC_EXCLUDE;
1985
1986 if (hdr->sh_type == SHT_ORDERED)
1987 flags |= SEC_SORT_ENTRIES;
1988
1989 bfd_set_section_flags (abfd, newsect, flags);
1990 return TRUE;
1991 }
1992
1993 /* Set up any other section flags and such that may be necessary. */
1994
1995 static bfd_boolean
1996 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1997 Elf_Internal_Shdr *shdr,
1998 asection *asect)
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 static bfd_boolean apuinfo_set;
2081
2082 static void
2083 apuinfo_list_init (void)
2084 {
2085 head = NULL;
2086 apuinfo_set = FALSE;
2087 }
2088
2089 static void
2090 apuinfo_list_add (unsigned long value)
2091 {
2092 apuinfo_list *entry = head;
2093
2094 while (entry != NULL)
2095 {
2096 if (entry->value == value)
2097 return;
2098 entry = entry->next;
2099 }
2100
2101 entry = bfd_malloc (sizeof (* entry));
2102 if (entry == NULL)
2103 return;
2104
2105 entry->value = value;
2106 entry->next = head;
2107 head = entry;
2108 }
2109
2110 static unsigned
2111 apuinfo_list_length (void)
2112 {
2113 apuinfo_list *entry;
2114 unsigned long count;
2115
2116 for (entry = head, count = 0;
2117 entry;
2118 entry = entry->next)
2119 ++ count;
2120
2121 return count;
2122 }
2123
2124 static inline unsigned long
2125 apuinfo_list_element (unsigned long number)
2126 {
2127 apuinfo_list * entry;
2128
2129 for (entry = head;
2130 entry && number --;
2131 entry = entry->next)
2132 ;
2133
2134 return entry ? entry->value : 0;
2135 }
2136
2137 static void
2138 apuinfo_list_finish (void)
2139 {
2140 apuinfo_list *entry;
2141
2142 for (entry = head; entry;)
2143 {
2144 apuinfo_list *next = entry->next;
2145 free (entry);
2146 entry = next;
2147 }
2148
2149 head = NULL;
2150 }
2151
2152 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2153 #define APUINFO_LABEL "APUinfo"
2154
2155 /* Scan the input BFDs and create a linked list of
2156 the APUinfo values that will need to be emitted. */
2157
2158 static void
2159 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2160 {
2161 bfd *ibfd;
2162 asection *asec;
2163 char *buffer = NULL;
2164 bfd_size_type largest_input_size = 0;
2165 unsigned i;
2166 unsigned long length;
2167 const char *error_message = NULL;
2168
2169 if (link_info == NULL)
2170 return;
2171
2172 apuinfo_list_init ();
2173
2174 /* Read in the input sections contents. */
2175 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2176 {
2177 unsigned long datum;
2178
2179 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2180 if (asec == NULL)
2181 continue;
2182
2183 error_message = _("corrupt %s section in %B");
2184 length = asec->size;
2185 if (length < 20)
2186 goto fail;
2187
2188 apuinfo_set = TRUE;
2189 if (largest_input_size < asec->size)
2190 {
2191 if (buffer)
2192 free (buffer);
2193 largest_input_size = asec->size;
2194 buffer = bfd_malloc (largest_input_size);
2195 if (!buffer)
2196 return;
2197 }
2198
2199 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2200 || (bfd_bread (buffer, length, ibfd) != length))
2201 {
2202 error_message = _("unable to read in %s section from %B");
2203 goto fail;
2204 }
2205
2206 /* Verify the contents of the header. Note - we have to
2207 extract the values this way in order to allow for a
2208 host whose endian-ness is different from the target. */
2209 datum = bfd_get_32 (ibfd, buffer);
2210 if (datum != sizeof APUINFO_LABEL)
2211 goto fail;
2212
2213 datum = bfd_get_32 (ibfd, buffer + 8);
2214 if (datum != 0x2)
2215 goto fail;
2216
2217 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2218 goto fail;
2219
2220 /* Get the number of bytes used for apuinfo entries. */
2221 datum = bfd_get_32 (ibfd, buffer + 4);
2222 if (datum + 20 != length)
2223 goto fail;
2224
2225 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2226 for (i = 0; i < datum; i += 4)
2227 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2228 }
2229
2230 error_message = NULL;
2231
2232 if (apuinfo_set)
2233 {
2234 /* Compute the size of the output section. */
2235 unsigned num_entries = apuinfo_list_length ();
2236
2237 /* Set the output section size, if it exists. */
2238 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2239
2240 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2241 {
2242 ibfd = abfd;
2243 error_message = _("warning: unable to set size of %s section in %B");
2244 }
2245 }
2246
2247 fail:
2248 if (buffer)
2249 free (buffer);
2250
2251 if (error_message)
2252 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2253 }
2254
2255 /* Prevent the output section from accumulating the input sections'
2256 contents. We have already stored this in our linked list structure. */
2257
2258 static bfd_boolean
2259 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2260 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2261 asection *asec,
2262 bfd_byte *contents ATTRIBUTE_UNUSED)
2263 {
2264 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2265 }
2266
2267 /* Finally we can generate the output section. */
2268
2269 static void
2270 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2271 {
2272 bfd_byte *buffer;
2273 asection *asec;
2274 unsigned i;
2275 unsigned num_entries;
2276 bfd_size_type length;
2277
2278 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2279 if (asec == NULL)
2280 return;
2281
2282 if (!apuinfo_set)
2283 return;
2284
2285 length = asec->size;
2286 if (length < 20)
2287 return;
2288
2289 buffer = bfd_malloc (length);
2290 if (buffer == NULL)
2291 {
2292 (*_bfd_error_handler)
2293 (_("failed to allocate space for new APUinfo section."));
2294 return;
2295 }
2296
2297 /* Create the apuinfo header. */
2298 num_entries = apuinfo_list_length ();
2299 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2300 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2301 bfd_put_32 (abfd, 0x2, buffer + 8);
2302 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2303
2304 length = 20;
2305 for (i = 0; i < num_entries; i++)
2306 {
2307 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2308 length += 4;
2309 }
2310
2311 if (length != asec->size)
2312 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2313
2314 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2315 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2316
2317 free (buffer);
2318
2319 apuinfo_list_finish ();
2320 }
2321 \f
2322 static bfd_boolean
2323 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2324 {
2325 bfd_byte buf[GLINK_ENTRY_SIZE];
2326
2327 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2328 return FALSE;
2329
2330 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2331 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2332 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2333 && bfd_get_32 (abfd, buf + 12) == BCTR);
2334 }
2335
2336 static bfd_boolean
2337 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2338 {
2339 bfd_vma vma = *(bfd_vma *) ptr;
2340 return ((section->flags & SEC_ALLOC) != 0
2341 && section->vma <= vma
2342 && vma < section->vma + section->size);
2343 }
2344
2345 static long
2346 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2347 long dynsymcount, asymbol **dynsyms,
2348 asymbol **ret)
2349 {
2350 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2351 asection *plt, *relplt, *dynamic, *glink;
2352 bfd_vma glink_vma = 0;
2353 bfd_vma resolv_vma = 0;
2354 bfd_vma stub_vma;
2355 asymbol *s;
2356 arelent *p;
2357 long count, i;
2358 size_t size;
2359 char *names;
2360 bfd_byte buf[4];
2361
2362 *ret = NULL;
2363
2364 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2365 return 0;
2366
2367 if (dynsymcount <= 0)
2368 return 0;
2369
2370 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2371 if (relplt == NULL)
2372 return 0;
2373
2374 plt = bfd_get_section_by_name (abfd, ".plt");
2375 if (plt == NULL)
2376 return 0;
2377
2378 /* Call common code to handle old-style executable PLTs. */
2379 if (elf_section_flags (plt) & SHF_EXECINSTR)
2380 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2381 dynsymcount, dynsyms, ret);
2382
2383 /* If this object was prelinked, the prelinker stored the address
2384 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2385 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2386 if (dynamic != NULL)
2387 {
2388 bfd_byte *dynbuf, *extdyn, *extdynend;
2389 size_t extdynsize;
2390 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2391
2392 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2393 return -1;
2394
2395 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2396 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2397
2398 extdyn = dynbuf;
2399 extdynend = extdyn + dynamic->size;
2400 for (; extdyn < extdynend; extdyn += extdynsize)
2401 {
2402 Elf_Internal_Dyn dyn;
2403 (*swap_dyn_in) (abfd, extdyn, &dyn);
2404
2405 if (dyn.d_tag == DT_NULL)
2406 break;
2407
2408 if (dyn.d_tag == DT_PPC_GOT)
2409 {
2410 unsigned int g_o_t = dyn.d_un.d_val;
2411 asection *got = bfd_get_section_by_name (abfd, ".got");
2412 if (got != NULL
2413 && bfd_get_section_contents (abfd, got, buf,
2414 g_o_t - got->vma + 4, 4))
2415 glink_vma = bfd_get_32 (abfd, buf);
2416 break;
2417 }
2418 }
2419 free (dynbuf);
2420 }
2421
2422 /* Otherwise we read the first plt entry. */
2423 if (glink_vma == 0)
2424 {
2425 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2426 glink_vma = bfd_get_32 (abfd, buf);
2427 }
2428
2429 if (glink_vma == 0)
2430 return 0;
2431
2432 /* The .glink section usually does not survive the final
2433 link; search for the section (usually .text) where the
2434 glink stubs now reside. */
2435 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2436 if (glink == NULL)
2437 return 0;
2438
2439 /* Determine glink PLT resolver by reading the relative branch
2440 from the first glink stub. */
2441 if (bfd_get_section_contents (abfd, glink, buf,
2442 glink_vma - glink->vma, 4))
2443 {
2444 unsigned int insn = bfd_get_32 (abfd, buf);
2445
2446 /* The first glink stub may either branch to the resolver ... */
2447 insn ^= B;
2448 if ((insn & ~0x3fffffc) == 0)
2449 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2450
2451 /* ... or fall through a bunch of NOPs. */
2452 else if ((insn ^ B ^ NOP) == 0)
2453 for (i = 4;
2454 bfd_get_section_contents (abfd, glink, buf,
2455 glink_vma - glink->vma + i, 4);
2456 i += 4)
2457 if (bfd_get_32 (abfd, buf) != NOP)
2458 {
2459 resolv_vma = glink_vma + i;
2460 break;
2461 }
2462 }
2463
2464 count = relplt->size / sizeof (Elf32_External_Rela);
2465 stub_vma = glink_vma - (bfd_vma) count * 16;
2466 /* If the stubs are those for -shared/-pie then we might have
2467 multiple stubs for each plt entry. If that is the case then
2468 there is no way to associate stubs with their plt entries short
2469 of figuring out the GOT pointer value used in the stub. */
2470 if (!is_nonpic_glink_stub (abfd, glink,
2471 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2472 return 0;
2473
2474 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2475 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2476 return -1;
2477
2478 size = count * sizeof (asymbol);
2479 p = relplt->relocation;
2480 for (i = 0; i < count; i++, p++)
2481 {
2482 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2483 if (p->addend != 0)
2484 size += sizeof ("+0x") - 1 + 8;
2485 }
2486
2487 size += sizeof (asymbol) + sizeof ("__glink");
2488
2489 if (resolv_vma)
2490 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2491
2492 s = *ret = bfd_malloc (size);
2493 if (s == NULL)
2494 return -1;
2495
2496 names = (char *) (s + count + 1 + (resolv_vma != 0));
2497 p = relplt->relocation;
2498 for (i = 0; i < count; i++, p++)
2499 {
2500 size_t len;
2501
2502 *s = **p->sym_ptr_ptr;
2503 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2504 we are defining a symbol, ensure one of them is set. */
2505 if ((s->flags & BSF_LOCAL) == 0)
2506 s->flags |= BSF_GLOBAL;
2507 s->flags |= BSF_SYNTHETIC;
2508 s->section = glink;
2509 s->value = stub_vma - glink->vma;
2510 s->name = names;
2511 s->udata.p = NULL;
2512 len = strlen ((*p->sym_ptr_ptr)->name);
2513 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2514 names += len;
2515 if (p->addend != 0)
2516 {
2517 memcpy (names, "+0x", sizeof ("+0x") - 1);
2518 names += sizeof ("+0x") - 1;
2519 bfd_sprintf_vma (abfd, names, p->addend);
2520 names += strlen (names);
2521 }
2522 memcpy (names, "@plt", sizeof ("@plt"));
2523 names += sizeof ("@plt");
2524 ++s;
2525 stub_vma += 16;
2526 }
2527
2528 /* Add a symbol at the start of the glink branch table. */
2529 memset (s, 0, sizeof *s);
2530 s->the_bfd = abfd;
2531 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2532 s->section = glink;
2533 s->value = glink_vma - glink->vma;
2534 s->name = names;
2535 memcpy (names, "__glink", sizeof ("__glink"));
2536 names += sizeof ("__glink");
2537 s++;
2538 count++;
2539
2540 if (resolv_vma)
2541 {
2542 /* Add a symbol for the glink PLT resolver. */
2543 memset (s, 0, sizeof *s);
2544 s->the_bfd = abfd;
2545 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2546 s->section = glink;
2547 s->value = resolv_vma - glink->vma;
2548 s->name = names;
2549 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2550 names += sizeof ("__glink_PLTresolve");
2551 s++;
2552 count++;
2553 }
2554
2555 return count;
2556 }
2557 \f
2558 /* The following functions are specific to the ELF linker, while
2559 functions above are used generally. They appear in this file more
2560 or less in the order in which they are called. eg.
2561 ppc_elf_check_relocs is called early in the link process,
2562 ppc_elf_finish_dynamic_sections is one of the last functions
2563 called. */
2564
2565 /* Track PLT entries needed for a given symbol. We might need more
2566 than one glink entry per symbol when generating a pic binary. */
2567 struct plt_entry
2568 {
2569 struct plt_entry *next;
2570
2571 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2572 This field stores the offset into .got2 used to initialise the
2573 GOT pointer reg. It will always be at least 32768. (Current
2574 gcc always uses an offset of 32768, but ld -r will pack .got2
2575 sections together resulting in larger offsets). */
2576 bfd_vma addend;
2577
2578 /* The .got2 section. */
2579 asection *sec;
2580
2581 /* PLT refcount or offset. */
2582 union
2583 {
2584 bfd_signed_vma refcount;
2585 bfd_vma offset;
2586 } plt;
2587
2588 /* .glink stub offset. */
2589 bfd_vma glink_offset;
2590 };
2591
2592 /* Of those relocs that might be copied as dynamic relocs, this function
2593 selects those that must be copied when linking a shared library,
2594 even when the symbol is local. */
2595
2596 static int
2597 must_be_dyn_reloc (struct bfd_link_info *info,
2598 enum elf_ppc_reloc_type r_type)
2599 {
2600 switch (r_type)
2601 {
2602 default:
2603 return 1;
2604
2605 case R_PPC_REL24:
2606 case R_PPC_REL14:
2607 case R_PPC_REL14_BRTAKEN:
2608 case R_PPC_REL14_BRNTAKEN:
2609 case R_PPC_REL32:
2610 return 0;
2611
2612 case R_PPC_TPREL32:
2613 case R_PPC_TPREL16:
2614 case R_PPC_TPREL16_LO:
2615 case R_PPC_TPREL16_HI:
2616 case R_PPC_TPREL16_HA:
2617 return !info->executable;
2618 }
2619 }
2620
2621 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2622 copying dynamic variables from a shared lib into an app's dynbss
2623 section, and instead use a dynamic relocation to point into the
2624 shared lib. */
2625 #define ELIMINATE_COPY_RELOCS 1
2626
2627 /* PPC ELF linker hash entry. */
2628
2629 struct ppc_elf_link_hash_entry
2630 {
2631 struct elf_link_hash_entry elf;
2632
2633 /* If this symbol is used in the linker created sections, the processor
2634 specific backend uses this field to map the field into the offset
2635 from the beginning of the section. */
2636 elf_linker_section_pointers_t *linker_section_pointer;
2637
2638 /* Track dynamic relocs copied for this symbol. */
2639 struct elf_dyn_relocs *dyn_relocs;
2640
2641 /* Contexts in which symbol is used in the GOT (or TOC).
2642 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2643 corresponding relocs are encountered during check_relocs.
2644 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2645 indicate the corresponding GOT entry type is not needed. */
2646 #define TLS_GD 1 /* GD reloc. */
2647 #define TLS_LD 2 /* LD reloc. */
2648 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2649 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2650 #define TLS_TLS 16 /* Any TLS reloc. */
2651 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2652 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2653 char tls_mask;
2654
2655 /* Nonzero if we have seen a small data relocation referring to this
2656 symbol. */
2657 unsigned char has_sda_refs;
2658 };
2659
2660 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2661
2662 /* PPC ELF linker hash table. */
2663
2664 struct ppc_elf_link_hash_table
2665 {
2666 struct elf_link_hash_table elf;
2667
2668 /* Short-cuts to get to dynamic linker sections. */
2669 asection *got;
2670 asection *relgot;
2671 asection *glink;
2672 asection *plt;
2673 asection *relplt;
2674 asection *iplt;
2675 asection *reliplt;
2676 asection *dynbss;
2677 asection *relbss;
2678 asection *dynsbss;
2679 asection *relsbss;
2680 elf_linker_section_t sdata[2];
2681 asection *sbss;
2682
2683 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2684 asection *srelplt2;
2685
2686 /* The .got.plt section (VxWorks only)*/
2687 asection *sgotplt;
2688
2689 /* Shortcut to __tls_get_addr. */
2690 struct elf_link_hash_entry *tls_get_addr;
2691
2692 /* The bfd that forced an old-style PLT. */
2693 bfd *old_bfd;
2694
2695 /* TLS local dynamic got entry handling. */
2696 union {
2697 bfd_signed_vma refcount;
2698 bfd_vma offset;
2699 } tlsld_got;
2700
2701 /* Offset of branch table to PltResolve function in glink. */
2702 bfd_vma glink_pltresolve;
2703
2704 /* Size of reserved GOT entries. */
2705 unsigned int got_header_size;
2706 /* Non-zero if allocating the header left a gap. */
2707 unsigned int got_gap;
2708
2709 /* The type of PLT we have chosen to use. */
2710 enum ppc_elf_plt_type plt_type;
2711
2712 /* Set if we should emit symbols for stubs. */
2713 unsigned int emit_stub_syms:1;
2714
2715 /* Set if __tls_get_addr optimization should not be done. */
2716 unsigned int no_tls_get_addr_opt:1;
2717
2718 /* True if the target system is VxWorks. */
2719 unsigned int is_vxworks:1;
2720
2721 /* The size of PLT entries. */
2722 int plt_entry_size;
2723 /* The distance between adjacent PLT slots. */
2724 int plt_slot_size;
2725 /* The size of the first PLT entry. */
2726 int plt_initial_entry_size;
2727
2728 /* Small local sym cache. */
2729 struct sym_cache sym_cache;
2730 };
2731
2732 /* Rename some of the generic section flags to better document how they
2733 are used here. */
2734
2735 /* Nonzero if this section has TLS related relocations. */
2736 #define has_tls_reloc sec_flg0
2737
2738 /* Nonzero if this section has a call to __tls_get_addr. */
2739 #define has_tls_get_addr_call sec_flg1
2740
2741 /* Get the PPC ELF linker hash table from a link_info structure. */
2742
2743 #define ppc_elf_hash_table(p) \
2744 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2745 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2746
2747 /* Create an entry in a PPC ELF linker hash table. */
2748
2749 static struct bfd_hash_entry *
2750 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2751 struct bfd_hash_table *table,
2752 const char *string)
2753 {
2754 /* Allocate the structure if it has not already been allocated by a
2755 subclass. */
2756 if (entry == NULL)
2757 {
2758 entry = bfd_hash_allocate (table,
2759 sizeof (struct ppc_elf_link_hash_entry));
2760 if (entry == NULL)
2761 return entry;
2762 }
2763
2764 /* Call the allocation method of the superclass. */
2765 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2766 if (entry != NULL)
2767 {
2768 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2769 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2770 ppc_elf_hash_entry (entry)->tls_mask = 0;
2771 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
2772 }
2773
2774 return entry;
2775 }
2776
2777 /* Create a PPC ELF linker hash table. */
2778
2779 static struct bfd_link_hash_table *
2780 ppc_elf_link_hash_table_create (bfd *abfd)
2781 {
2782 struct ppc_elf_link_hash_table *ret;
2783
2784 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2785 if (ret == NULL)
2786 return NULL;
2787
2788 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2789 ppc_elf_link_hash_newfunc,
2790 sizeof (struct ppc_elf_link_hash_entry),
2791 PPC32_ELF_DATA))
2792 {
2793 free (ret);
2794 return NULL;
2795 }
2796
2797 ret->elf.init_plt_refcount.refcount = 0;
2798 ret->elf.init_plt_refcount.glist = NULL;
2799 ret->elf.init_plt_offset.offset = 0;
2800 ret->elf.init_plt_offset.glist = NULL;
2801
2802 ret->sdata[0].name = ".sdata";
2803 ret->sdata[0].sym_name = "_SDA_BASE_";
2804 ret->sdata[0].bss_name = ".sbss";
2805
2806 ret->sdata[1].name = ".sdata2";
2807 ret->sdata[1].sym_name = "_SDA2_BASE_";
2808 ret->sdata[1].bss_name = ".sbss2";
2809
2810 ret->plt_entry_size = 12;
2811 ret->plt_slot_size = 8;
2812 ret->plt_initial_entry_size = 72;
2813
2814 return &ret->elf.root;
2815 }
2816
2817 /* Create .got and the related sections. */
2818
2819 static bfd_boolean
2820 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2821 {
2822 struct ppc_elf_link_hash_table *htab;
2823 asection *s;
2824 flagword flags;
2825
2826 if (!_bfd_elf_create_got_section (abfd, info))
2827 return FALSE;
2828
2829 htab = ppc_elf_hash_table (info);
2830 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2831 if (s == NULL)
2832 abort ();
2833
2834 if (htab->is_vxworks)
2835 {
2836 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2837 if (!htab->sgotplt)
2838 abort ();
2839 }
2840 else
2841 {
2842 /* The powerpc .got has a blrl instruction in it. Mark it
2843 executable. */
2844 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2845 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2846 if (!bfd_set_section_flags (abfd, s, flags))
2847 return FALSE;
2848 }
2849
2850 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2851 if (!htab->relgot)
2852 abort ();
2853
2854 return TRUE;
2855 }
2856
2857 static bfd_boolean
2858 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2859 {
2860 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2861 asection *s;
2862 flagword flags;
2863
2864 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2865 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2866 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2867 htab->glink = s;
2868 if (s == NULL
2869 || !bfd_set_section_alignment (abfd, s, 4))
2870 return FALSE;
2871
2872 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2873 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2874 htab->iplt = s;
2875 if (s == NULL
2876 || !bfd_set_section_alignment (abfd, s, 4))
2877 return FALSE;
2878
2879 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2880 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2881 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2882 htab->reliplt = s;
2883 if (s == NULL
2884 || ! bfd_set_section_alignment (abfd, s, 2))
2885 return FALSE;
2886 return TRUE;
2887 }
2888
2889 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2890 to output sections (just like _bfd_elf_create_dynamic_sections has
2891 to create .dynbss and .rela.bss). */
2892
2893 static bfd_boolean
2894 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2895 {
2896 struct ppc_elf_link_hash_table *htab;
2897 asection *s;
2898 flagword flags;
2899
2900 htab = ppc_elf_hash_table (info);
2901
2902 if (htab->got == NULL
2903 && !ppc_elf_create_got (abfd, info))
2904 return FALSE;
2905
2906 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2907 return FALSE;
2908
2909 if (htab->glink == NULL
2910 && !ppc_elf_create_glink (abfd, info))
2911 return FALSE;
2912
2913 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2914 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2915 SEC_ALLOC | SEC_LINKER_CREATED);
2916 htab->dynsbss = s;
2917 if (s == NULL)
2918 return FALSE;
2919
2920 if (! info->shared)
2921 {
2922 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2923 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2924 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2925 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2926 htab->relsbss = s;
2927 if (s == NULL
2928 || ! bfd_set_section_alignment (abfd, s, 2))
2929 return FALSE;
2930 }
2931
2932 if (htab->is_vxworks
2933 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2934 return FALSE;
2935
2936 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2937 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2938 if (s == NULL)
2939 abort ();
2940
2941 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2942 if (htab->plt_type == PLT_VXWORKS)
2943 /* The VxWorks PLT is a loaded section with contents. */
2944 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2945 return bfd_set_section_flags (abfd, s, flags);
2946 }
2947
2948 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2949
2950 static void
2951 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2952 struct elf_link_hash_entry *dir,
2953 struct elf_link_hash_entry *ind)
2954 {
2955 struct ppc_elf_link_hash_entry *edir, *eind;
2956
2957 edir = (struct ppc_elf_link_hash_entry *) dir;
2958 eind = (struct ppc_elf_link_hash_entry *) ind;
2959
2960 edir->tls_mask |= eind->tls_mask;
2961 edir->has_sda_refs |= eind->has_sda_refs;
2962
2963 /* If called to transfer flags for a weakdef during processing
2964 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2965 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2966 if (!(ELIMINATE_COPY_RELOCS
2967 && eind->elf.root.type != bfd_link_hash_indirect
2968 && edir->elf.dynamic_adjusted))
2969 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2970
2971 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2972 edir->elf.ref_regular |= eind->elf.ref_regular;
2973 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2974 edir->elf.needs_plt |= eind->elf.needs_plt;
2975 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2976
2977 /* If we were called to copy over info for a weak sym, that's all. */
2978 if (eind->elf.root.type != bfd_link_hash_indirect)
2979 return;
2980
2981 if (eind->dyn_relocs != NULL)
2982 {
2983 if (edir->dyn_relocs != NULL)
2984 {
2985 struct elf_dyn_relocs **pp;
2986 struct elf_dyn_relocs *p;
2987
2988 /* Add reloc counts against the indirect sym to the direct sym
2989 list. Merge any entries against the same section. */
2990 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2991 {
2992 struct elf_dyn_relocs *q;
2993
2994 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2995 if (q->sec == p->sec)
2996 {
2997 q->pc_count += p->pc_count;
2998 q->count += p->count;
2999 *pp = p->next;
3000 break;
3001 }
3002 if (q == NULL)
3003 pp = &p->next;
3004 }
3005 *pp = edir->dyn_relocs;
3006 }
3007
3008 edir->dyn_relocs = eind->dyn_relocs;
3009 eind->dyn_relocs = NULL;
3010 }
3011
3012 /* Copy over the GOT refcount entries that we may have already seen to
3013 the symbol which just became indirect. */
3014 edir->elf.got.refcount += eind->elf.got.refcount;
3015 eind->elf.got.refcount = 0;
3016
3017 /* And plt entries. */
3018 if (eind->elf.plt.plist != NULL)
3019 {
3020 if (edir->elf.plt.plist != NULL)
3021 {
3022 struct plt_entry **entp;
3023 struct plt_entry *ent;
3024
3025 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3026 {
3027 struct plt_entry *dent;
3028
3029 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3030 if (dent->sec == ent->sec && dent->addend == ent->addend)
3031 {
3032 dent->plt.refcount += ent->plt.refcount;
3033 *entp = ent->next;
3034 break;
3035 }
3036 if (dent == NULL)
3037 entp = &ent->next;
3038 }
3039 *entp = edir->elf.plt.plist;
3040 }
3041
3042 edir->elf.plt.plist = eind->elf.plt.plist;
3043 eind->elf.plt.plist = NULL;
3044 }
3045
3046 if (eind->elf.dynindx != -1)
3047 {
3048 if (edir->elf.dynindx != -1)
3049 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3050 edir->elf.dynstr_index);
3051 edir->elf.dynindx = eind->elf.dynindx;
3052 edir->elf.dynstr_index = eind->elf.dynstr_index;
3053 eind->elf.dynindx = -1;
3054 eind->elf.dynstr_index = 0;
3055 }
3056 }
3057
3058 /* Hook called by the linker routine which adds symbols from an object
3059 file. We use it to put .comm items in .sbss, and not .bss. */
3060
3061 static bfd_boolean
3062 ppc_elf_add_symbol_hook (bfd *abfd,
3063 struct bfd_link_info *info,
3064 Elf_Internal_Sym *sym,
3065 const char **namep ATTRIBUTE_UNUSED,
3066 flagword *flagsp ATTRIBUTE_UNUSED,
3067 asection **secp,
3068 bfd_vma *valp)
3069 {
3070 if (sym->st_shndx == SHN_COMMON
3071 && !info->relocatable
3072 && is_ppc_elf (info->output_bfd)
3073 && sym->st_size <= elf_gp_size (abfd))
3074 {
3075 /* Common symbols less than or equal to -G nn bytes are automatically
3076 put into .sbss. */
3077 struct ppc_elf_link_hash_table *htab;
3078
3079 htab = ppc_elf_hash_table (info);
3080 if (htab->sbss == NULL)
3081 {
3082 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3083
3084 if (!htab->elf.dynobj)
3085 htab->elf.dynobj = abfd;
3086
3087 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3088 ".sbss",
3089 flags);
3090 if (htab->sbss == NULL)
3091 return FALSE;
3092 }
3093
3094 *secp = htab->sbss;
3095 *valp = sym->st_size;
3096 }
3097
3098 if ((abfd->flags & DYNAMIC) == 0
3099 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3100 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3101 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3102
3103 return TRUE;
3104 }
3105 \f
3106 static bfd_boolean
3107 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3108 {
3109 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3110
3111 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3112 TRUE, FALSE, TRUE);
3113 if (lsect->sym == NULL)
3114 return FALSE;
3115 if (lsect->sym->root.type == bfd_link_hash_new)
3116 lsect->sym->non_elf = 0;
3117 lsect->sym->ref_regular = 1;
3118 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3119 return TRUE;
3120 }
3121
3122 /* Create a special linker section. */
3123
3124 static bfd_boolean
3125 ppc_elf_create_linker_section (bfd *abfd,
3126 struct bfd_link_info *info,
3127 flagword flags,
3128 elf_linker_section_t *lsect)
3129 {
3130 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3131 asection *s;
3132
3133 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3134 | SEC_LINKER_CREATED);
3135
3136 /* Record the first bfd that needs the special sections. */
3137 if (!htab->elf.dynobj)
3138 htab->elf.dynobj = abfd;
3139
3140 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3141 lsect->name,
3142 flags);
3143 if (s == NULL
3144 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3145 return FALSE;
3146 lsect->section = s;
3147
3148 return create_sdata_sym (info, lsect);
3149 }
3150
3151 /* Find a linker generated pointer with a given addend and type. */
3152
3153 static elf_linker_section_pointers_t *
3154 elf_find_pointer_linker_section
3155 (elf_linker_section_pointers_t *linker_pointers,
3156 bfd_vma addend,
3157 elf_linker_section_t *lsect)
3158 {
3159 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3160 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3161 return linker_pointers;
3162
3163 return NULL;
3164 }
3165
3166 /* Allocate a pointer to live in a linker created section. */
3167
3168 static bfd_boolean
3169 elf_create_pointer_linker_section (bfd *abfd,
3170 elf_linker_section_t *lsect,
3171 struct elf_link_hash_entry *h,
3172 const Elf_Internal_Rela *rel)
3173 {
3174 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3175 elf_linker_section_pointers_t *linker_section_ptr;
3176 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3177 bfd_size_type amt;
3178
3179 BFD_ASSERT (lsect != NULL);
3180
3181 /* Is this a global symbol? */
3182 if (h != NULL)
3183 {
3184 struct ppc_elf_link_hash_entry *eh;
3185
3186 /* Has this symbol already been allocated? If so, our work is done. */
3187 eh = (struct ppc_elf_link_hash_entry *) h;
3188 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3189 rel->r_addend,
3190 lsect))
3191 return TRUE;
3192
3193 ptr_linker_section_ptr = &eh->linker_section_pointer;
3194 }
3195 else
3196 {
3197 BFD_ASSERT (is_ppc_elf (abfd));
3198
3199 /* Allocation of a pointer to a local symbol. */
3200 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3201
3202 /* Allocate a table to hold the local symbols if first time. */
3203 if (!ptr)
3204 {
3205 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3206
3207 amt = num_symbols;
3208 amt *= sizeof (elf_linker_section_pointers_t *);
3209 ptr = bfd_zalloc (abfd, amt);
3210
3211 if (!ptr)
3212 return FALSE;
3213
3214 elf_local_ptr_offsets (abfd) = ptr;
3215 }
3216
3217 /* Has this symbol already been allocated? If so, our work is done. */
3218 if (elf_find_pointer_linker_section (ptr[r_symndx],
3219 rel->r_addend,
3220 lsect))
3221 return TRUE;
3222
3223 ptr_linker_section_ptr = &ptr[r_symndx];
3224 }
3225
3226 /* Allocate space for a pointer in the linker section, and allocate
3227 a new pointer record from internal memory. */
3228 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3229 amt = sizeof (elf_linker_section_pointers_t);
3230 linker_section_ptr = bfd_alloc (abfd, amt);
3231
3232 if (!linker_section_ptr)
3233 return FALSE;
3234
3235 linker_section_ptr->next = *ptr_linker_section_ptr;
3236 linker_section_ptr->addend = rel->r_addend;
3237 linker_section_ptr->lsect = lsect;
3238 *ptr_linker_section_ptr = linker_section_ptr;
3239
3240 linker_section_ptr->offset = lsect->section->size;
3241 lsect->section->size += 4;
3242
3243 #ifdef DEBUG
3244 fprintf (stderr,
3245 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3246 lsect->name, (long) linker_section_ptr->offset,
3247 (long) lsect->section->size);
3248 #endif
3249
3250 return TRUE;
3251 }
3252
3253 static struct plt_entry **
3254 update_local_sym_info (bfd *abfd,
3255 Elf_Internal_Shdr *symtab_hdr,
3256 unsigned long r_symndx,
3257 int tls_type)
3258 {
3259 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3260 struct plt_entry **local_plt;
3261 char *local_got_tls_masks;
3262
3263 if (local_got_refcounts == NULL)
3264 {
3265 bfd_size_type size = symtab_hdr->sh_info;
3266
3267 size *= (sizeof (*local_got_refcounts)
3268 + sizeof (*local_plt)
3269 + sizeof (*local_got_tls_masks));
3270 local_got_refcounts = bfd_zalloc (abfd, size);
3271 if (local_got_refcounts == NULL)
3272 return NULL;
3273 elf_local_got_refcounts (abfd) = local_got_refcounts;
3274 }
3275
3276 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3277 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3278 local_got_tls_masks[r_symndx] |= tls_type;
3279 if (tls_type != PLT_IFUNC)
3280 local_got_refcounts[r_symndx] += 1;
3281 return local_plt + r_symndx;
3282 }
3283
3284 static bfd_boolean
3285 update_plt_info (bfd *abfd, struct plt_entry **plist,
3286 asection *sec, bfd_vma addend)
3287 {
3288 struct plt_entry *ent;
3289
3290 if (addend < 32768)
3291 sec = NULL;
3292 for (ent = *plist; ent != NULL; ent = ent->next)
3293 if (ent->sec == sec && ent->addend == addend)
3294 break;
3295 if (ent == NULL)
3296 {
3297 bfd_size_type amt = sizeof (*ent);
3298 ent = bfd_alloc (abfd, amt);
3299 if (ent == NULL)
3300 return FALSE;
3301 ent->next = *plist;
3302 ent->sec = sec;
3303 ent->addend = addend;
3304 ent->plt.refcount = 0;
3305 *plist = ent;
3306 }
3307 ent->plt.refcount += 1;
3308 return TRUE;
3309 }
3310
3311 static struct plt_entry *
3312 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3313 {
3314 struct plt_entry *ent;
3315
3316 if (addend < 32768)
3317 sec = NULL;
3318 for (ent = *plist; ent != NULL; ent = ent->next)
3319 if (ent->sec == sec && ent->addend == addend)
3320 break;
3321 return ent;
3322 }
3323
3324 static bfd_boolean
3325 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3326 {
3327 return (r_type == R_PPC_PLTREL24
3328 || r_type == R_PPC_LOCAL24PC
3329 || r_type == R_PPC_REL24
3330 || r_type == R_PPC_REL14
3331 || r_type == R_PPC_REL14_BRTAKEN
3332 || r_type == R_PPC_REL14_BRNTAKEN
3333 || r_type == R_PPC_ADDR24
3334 || r_type == R_PPC_ADDR14
3335 || r_type == R_PPC_ADDR14_BRTAKEN
3336 || r_type == R_PPC_ADDR14_BRNTAKEN);
3337 }
3338
3339 static void
3340 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3341 {
3342 (*_bfd_error_handler)
3343 (_("%B: relocation %s cannot be used when making a shared object"),
3344 abfd,
3345 ppc_elf_howto_table[r_type]->name);
3346 bfd_set_error (bfd_error_bad_value);
3347 }
3348
3349 /* Look through the relocs for a section during the first phase, and
3350 allocate space in the global offset table or procedure linkage
3351 table. */
3352
3353 static bfd_boolean
3354 ppc_elf_check_relocs (bfd *abfd,
3355 struct bfd_link_info *info,
3356 asection *sec,
3357 const Elf_Internal_Rela *relocs)
3358 {
3359 struct ppc_elf_link_hash_table *htab;
3360 Elf_Internal_Shdr *symtab_hdr;
3361 struct elf_link_hash_entry **sym_hashes;
3362 const Elf_Internal_Rela *rel;
3363 const Elf_Internal_Rela *rel_end;
3364 asection *got2, *sreloc;
3365 struct elf_link_hash_entry *tga;
3366
3367 if (info->relocatable)
3368 return TRUE;
3369
3370 /* Don't do anything special with non-loaded, non-alloced sections.
3371 In particular, any relocs in such sections should not affect GOT
3372 and PLT reference counting (ie. we don't allow them to create GOT
3373 or PLT entries), there's no possibility or desire to optimize TLS
3374 relocs, and there's not much point in propagating relocs to shared
3375 libs that the dynamic linker won't relocate. */
3376 if ((sec->flags & SEC_ALLOC) == 0)
3377 return TRUE;
3378
3379 #ifdef DEBUG
3380 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3381 sec, abfd);
3382 #endif
3383
3384 BFD_ASSERT (is_ppc_elf (abfd));
3385
3386 /* Initialize howto table if not already done. */
3387 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3388 ppc_elf_howto_init ();
3389
3390 htab = ppc_elf_hash_table (info);
3391 if (htab->glink == NULL)
3392 {
3393 if (htab->elf.dynobj == NULL)
3394 htab->elf.dynobj = abfd;
3395 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3396 return FALSE;
3397 }
3398 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3399 FALSE, FALSE, TRUE);
3400 symtab_hdr = &elf_symtab_hdr (abfd);
3401 sym_hashes = elf_sym_hashes (abfd);
3402 got2 = bfd_get_section_by_name (abfd, ".got2");
3403 sreloc = NULL;
3404
3405 rel_end = relocs + sec->reloc_count;
3406 for (rel = relocs; rel < rel_end; rel++)
3407 {
3408 unsigned long r_symndx;
3409 enum elf_ppc_reloc_type r_type;
3410 struct elf_link_hash_entry *h;
3411 int tls_type;
3412
3413 r_symndx = ELF32_R_SYM (rel->r_info);
3414 if (r_symndx < symtab_hdr->sh_info)
3415 h = NULL;
3416 else
3417 {
3418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3419 while (h->root.type == bfd_link_hash_indirect
3420 || h->root.type == bfd_link_hash_warning)
3421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3422 }
3423
3424 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3425 This shows up in particular in an R_PPC_ADDR32 in the eabi
3426 startup code. */
3427 if (h != NULL
3428 && htab->got == NULL
3429 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3430 {
3431 if (htab->elf.dynobj == NULL)
3432 htab->elf.dynobj = abfd;
3433 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3434 return FALSE;
3435 BFD_ASSERT (h == htab->elf.hgot);
3436 }
3437
3438 tls_type = 0;
3439 r_type = ELF32_R_TYPE (rel->r_info);
3440 if (h == NULL && !htab->is_vxworks)
3441 {
3442 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3443 abfd, r_symndx);
3444 if (isym == NULL)
3445 return FALSE;
3446
3447 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3448 && (!info->shared
3449 || is_branch_reloc (r_type)))
3450 {
3451 struct plt_entry **ifunc;
3452 bfd_vma addend;
3453
3454 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3455 PLT_IFUNC);
3456 if (ifunc == NULL)
3457 return FALSE;
3458
3459 /* STT_GNU_IFUNC symbols must have a PLT entry;
3460 In a non-pie executable even when there are
3461 no plt calls. */
3462 addend = 0;
3463 if (r_type == R_PPC_PLTREL24)
3464 {
3465 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3466 if (info->shared)
3467 addend = rel->r_addend;
3468 }
3469 if (!update_plt_info (abfd, ifunc, got2, addend))
3470 return FALSE;
3471 }
3472 }
3473
3474 if (!htab->is_vxworks
3475 && is_branch_reloc (r_type)
3476 && h != NULL
3477 && h == tga)
3478 {
3479 if (rel != relocs
3480 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3481 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3482 /* We have a new-style __tls_get_addr call with a marker
3483 reloc. */
3484 ;
3485 else
3486 /* Mark this section as having an old-style call. */
3487 sec->has_tls_get_addr_call = 1;
3488 }
3489
3490 switch (r_type)
3491 {
3492 case R_PPC_TLSGD:
3493 case R_PPC_TLSLD:
3494 /* These special tls relocs tie a call to __tls_get_addr with
3495 its parameter symbol. */
3496 break;
3497
3498 case R_PPC_GOT_TLSLD16:
3499 case R_PPC_GOT_TLSLD16_LO:
3500 case R_PPC_GOT_TLSLD16_HI:
3501 case R_PPC_GOT_TLSLD16_HA:
3502 tls_type = TLS_TLS | TLS_LD;
3503 goto dogottls;
3504
3505 case R_PPC_GOT_TLSGD16:
3506 case R_PPC_GOT_TLSGD16_LO:
3507 case R_PPC_GOT_TLSGD16_HI:
3508 case R_PPC_GOT_TLSGD16_HA:
3509 tls_type = TLS_TLS | TLS_GD;
3510 goto dogottls;
3511
3512 case R_PPC_GOT_TPREL16:
3513 case R_PPC_GOT_TPREL16_LO:
3514 case R_PPC_GOT_TPREL16_HI:
3515 case R_PPC_GOT_TPREL16_HA:
3516 if (!info->executable)
3517 info->flags |= DF_STATIC_TLS;
3518 tls_type = TLS_TLS | TLS_TPREL;
3519 goto dogottls;
3520
3521 case R_PPC_GOT_DTPREL16:
3522 case R_PPC_GOT_DTPREL16_LO:
3523 case R_PPC_GOT_DTPREL16_HI:
3524 case R_PPC_GOT_DTPREL16_HA:
3525 tls_type = TLS_TLS | TLS_DTPREL;
3526 dogottls:
3527 sec->has_tls_reloc = 1;
3528 /* Fall thru */
3529
3530 /* GOT16 relocations */
3531 case R_PPC_GOT16:
3532 case R_PPC_GOT16_LO:
3533 case R_PPC_GOT16_HI:
3534 case R_PPC_GOT16_HA:
3535 /* This symbol requires a global offset table entry. */
3536 if (htab->got == NULL)
3537 {
3538 if (htab->elf.dynobj == NULL)
3539 htab->elf.dynobj = abfd;
3540 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3541 return FALSE;
3542 }
3543 if (h != NULL)
3544 {
3545 h->got.refcount += 1;
3546 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3547 }
3548 else
3549 /* This is a global offset table entry for a local symbol. */
3550 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3551 return FALSE;
3552
3553 /* We may also need a plt entry if the symbol turns out to be
3554 an ifunc. */
3555 if (h != NULL && !info->shared)
3556 {
3557 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3558 return FALSE;
3559 }
3560 break;
3561
3562 /* Indirect .sdata relocation. */
3563 case R_PPC_EMB_SDAI16:
3564 if (info->shared)
3565 {
3566 bad_shared_reloc (abfd, r_type);
3567 return FALSE;
3568 }
3569 if (htab->sdata[0].section == NULL
3570 && !ppc_elf_create_linker_section (abfd, info, 0,
3571 &htab->sdata[0]))
3572 return FALSE;
3573 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3574 h, rel))
3575 return FALSE;
3576 if (h != NULL)
3577 {
3578 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3579 h->non_got_ref = TRUE;
3580 }
3581 break;
3582
3583 /* Indirect .sdata2 relocation. */
3584 case R_PPC_EMB_SDA2I16:
3585 if (info->shared)
3586 {
3587 bad_shared_reloc (abfd, r_type);
3588 return FALSE;
3589 }
3590 if (htab->sdata[1].section == NULL
3591 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3592 &htab->sdata[1]))
3593 return FALSE;
3594 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3595 h, rel))
3596 return FALSE;
3597 if (h != NULL)
3598 {
3599 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3600 h->non_got_ref = TRUE;
3601 }
3602 break;
3603
3604 case R_PPC_SDAREL16:
3605 if (htab->sdata[0].sym == NULL
3606 && !create_sdata_sym (info, &htab->sdata[0]))
3607 return FALSE;
3608 if (h != NULL)
3609 {
3610 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3611 h->non_got_ref = TRUE;
3612 }
3613 break;
3614
3615 case R_PPC_EMB_SDA2REL:
3616 if (info->shared)
3617 {
3618 bad_shared_reloc (abfd, r_type);
3619 return FALSE;
3620 }
3621 if (htab->sdata[1].sym == NULL
3622 && !create_sdata_sym (info, &htab->sdata[1]))
3623 return FALSE;
3624 if (h != NULL)
3625 {
3626 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3627 h->non_got_ref = TRUE;
3628 }
3629 break;
3630
3631 case R_PPC_EMB_SDA21:
3632 case R_PPC_EMB_RELSDA:
3633 if (info->shared)
3634 {
3635 bad_shared_reloc (abfd, r_type);
3636 return FALSE;
3637 }
3638 if (htab->sdata[0].sym == NULL
3639 && !create_sdata_sym (info, &htab->sdata[0]))
3640 return FALSE;
3641 if (htab->sdata[1].sym == NULL
3642 && !create_sdata_sym (info, &htab->sdata[1]))
3643 return FALSE;
3644 if (h != NULL)
3645 {
3646 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3647 h->non_got_ref = TRUE;
3648 }
3649 break;
3650
3651 case R_PPC_EMB_NADDR32:
3652 case R_PPC_EMB_NADDR16:
3653 case R_PPC_EMB_NADDR16_LO:
3654 case R_PPC_EMB_NADDR16_HI:
3655 case R_PPC_EMB_NADDR16_HA:
3656 if (info->shared)
3657 {
3658 bad_shared_reloc (abfd, r_type);
3659 return FALSE;
3660 }
3661 if (h != NULL)
3662 h->non_got_ref = TRUE;
3663 break;
3664
3665 case R_PPC_PLTREL24:
3666 if (h == NULL)
3667 break;
3668 /* Fall through */
3669 case R_PPC_PLT32:
3670 case R_PPC_PLTREL32:
3671 case R_PPC_PLT16_LO:
3672 case R_PPC_PLT16_HI:
3673 case R_PPC_PLT16_HA:
3674 #ifdef DEBUG
3675 fprintf (stderr, "Reloc requires a PLT entry\n");
3676 #endif
3677 /* This symbol requires a procedure linkage table entry. We
3678 actually build the entry in finish_dynamic_symbol,
3679 because this might be a case of linking PIC code without
3680 linking in any dynamic objects, in which case we don't
3681 need to generate a procedure linkage table after all. */
3682
3683 if (h == NULL)
3684 {
3685 /* It does not make sense to have a procedure linkage
3686 table entry for a local symbol. */
3687 info->callbacks->einfo (_("%H: %s reloc against local symbol\n"),
3688 abfd, sec, rel->r_offset,
3689 ppc_elf_howto_table[r_type]->name);
3690 bfd_set_error (bfd_error_bad_value);
3691 return FALSE;
3692 }
3693 else
3694 {
3695 bfd_vma addend = 0;
3696
3697 if (r_type == R_PPC_PLTREL24)
3698 {
3699 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3700 if (info->shared)
3701 addend = rel->r_addend;
3702 }
3703 h->needs_plt = 1;
3704 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3705 return FALSE;
3706 }
3707 break;
3708
3709 /* The following relocations don't need to propagate the
3710 relocation if linking a shared object since they are
3711 section relative. */
3712 case R_PPC_SECTOFF:
3713 case R_PPC_SECTOFF_LO:
3714 case R_PPC_SECTOFF_HI:
3715 case R_PPC_SECTOFF_HA:
3716 case R_PPC_DTPREL16:
3717 case R_PPC_DTPREL16_LO:
3718 case R_PPC_DTPREL16_HI:
3719 case R_PPC_DTPREL16_HA:
3720 case R_PPC_TOC16:
3721 break;
3722
3723 case R_PPC_REL16:
3724 case R_PPC_REL16_LO:
3725 case R_PPC_REL16_HI:
3726 case R_PPC_REL16_HA:
3727 ppc_elf_tdata (abfd)->has_rel16 = 1;
3728 break;
3729
3730 /* These are just markers. */
3731 case R_PPC_TLS:
3732 case R_PPC_EMB_MRKREF:
3733 case R_PPC_NONE:
3734 case R_PPC_max:
3735 case R_PPC_RELAX:
3736 case R_PPC_RELAX_PLT:
3737 case R_PPC_RELAX_PLTREL24:
3738 break;
3739
3740 /* These should only appear in dynamic objects. */
3741 case R_PPC_COPY:
3742 case R_PPC_GLOB_DAT:
3743 case R_PPC_JMP_SLOT:
3744 case R_PPC_RELATIVE:
3745 case R_PPC_IRELATIVE:
3746 break;
3747
3748 /* These aren't handled yet. We'll report an error later. */
3749 case R_PPC_ADDR30:
3750 case R_PPC_EMB_RELSEC16:
3751 case R_PPC_EMB_RELST_LO:
3752 case R_PPC_EMB_RELST_HI:
3753 case R_PPC_EMB_RELST_HA:
3754 case R_PPC_EMB_BIT_FLD:
3755 break;
3756
3757 /* This refers only to functions defined in the shared library. */
3758 case R_PPC_LOCAL24PC:
3759 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3760 {
3761 htab->plt_type = PLT_OLD;
3762 htab->old_bfd = abfd;
3763 }
3764 break;
3765
3766 /* This relocation describes the C++ object vtable hierarchy.
3767 Reconstruct it for later use during GC. */
3768 case R_PPC_GNU_VTINHERIT:
3769 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3770 return FALSE;
3771 break;
3772
3773 /* This relocation describes which C++ vtable entries are actually
3774 used. Record for later use during GC. */
3775 case R_PPC_GNU_VTENTRY:
3776 BFD_ASSERT (h != NULL);
3777 if (h != NULL
3778 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3779 return FALSE;
3780 break;
3781
3782 /* We shouldn't really be seeing these. */
3783 case R_PPC_TPREL32:
3784 case R_PPC_TPREL16:
3785 case R_PPC_TPREL16_LO:
3786 case R_PPC_TPREL16_HI:
3787 case R_PPC_TPREL16_HA:
3788 if (!info->executable)
3789 info->flags |= DF_STATIC_TLS;
3790 goto dodyn;
3791
3792 /* Nor these. */
3793 case R_PPC_DTPMOD32:
3794 case R_PPC_DTPREL32:
3795 goto dodyn;
3796
3797 case R_PPC_REL32:
3798 if (h == NULL
3799 && got2 != NULL
3800 && (sec->flags & SEC_CODE) != 0
3801 && info->shared
3802 && htab->plt_type == PLT_UNSET)
3803 {
3804 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3805 the start of a function, which assembles to a REL32
3806 reference to .got2. If we detect one of these, then
3807 force the old PLT layout because the linker cannot
3808 reliably deduce the GOT pointer value needed for
3809 PLT call stubs. */
3810 asection *s;
3811 Elf_Internal_Sym *isym;
3812
3813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3814 abfd, r_symndx);
3815 if (isym == NULL)
3816 return FALSE;
3817
3818 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3819 if (s == got2)
3820 {
3821 htab->plt_type = PLT_OLD;
3822 htab->old_bfd = abfd;
3823 }
3824 }
3825 if (h == NULL || h == htab->elf.hgot)
3826 break;
3827 /* fall through */
3828
3829 case R_PPC_ADDR32:
3830 case R_PPC_ADDR16:
3831 case R_PPC_ADDR16_LO:
3832 case R_PPC_ADDR16_HI:
3833 case R_PPC_ADDR16_HA:
3834 case R_PPC_UADDR32:
3835 case R_PPC_UADDR16:
3836 if (h != NULL && !info->shared)
3837 {
3838 /* We may need a plt entry if the symbol turns out to be
3839 a function defined in a dynamic object. */
3840 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3841 return FALSE;
3842
3843 /* We may need a copy reloc too. */
3844 h->non_got_ref = 1;
3845 h->pointer_equality_needed = 1;
3846 }
3847 goto dodyn;
3848
3849 case R_PPC_REL24:
3850 case R_PPC_REL14:
3851 case R_PPC_REL14_BRTAKEN:
3852 case R_PPC_REL14_BRNTAKEN:
3853 if (h == NULL)
3854 break;
3855 if (h == htab->elf.hgot)
3856 {
3857 if (htab->plt_type == PLT_UNSET)
3858 {
3859 htab->plt_type = PLT_OLD;
3860 htab->old_bfd = abfd;
3861 }
3862 break;
3863 }
3864 /* fall through */
3865
3866 case R_PPC_ADDR24:
3867 case R_PPC_ADDR14:
3868 case R_PPC_ADDR14_BRTAKEN:
3869 case R_PPC_ADDR14_BRNTAKEN:
3870 if (h != NULL && !info->shared)
3871 {
3872 /* We may need a plt entry if the symbol turns out to be
3873 a function defined in a dynamic object. */
3874 h->needs_plt = 1;
3875 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3876 return FALSE;
3877 break;
3878 }
3879
3880 dodyn:
3881 /* If we are creating a shared library, and this is a reloc
3882 against a global symbol, or a non PC relative reloc
3883 against a local symbol, then we need to copy the reloc
3884 into the shared library. However, if we are linking with
3885 -Bsymbolic, we do not need to copy a reloc against a
3886 global symbol which is defined in an object we are
3887 including in the link (i.e., DEF_REGULAR is set). At
3888 this point we have not seen all the input files, so it is
3889 possible that DEF_REGULAR is not set now but will be set
3890 later (it is never cleared). In case of a weak definition,
3891 DEF_REGULAR may be cleared later by a strong definition in
3892 a shared library. We account for that possibility below by
3893 storing information in the dyn_relocs field of the hash
3894 table entry. A similar situation occurs when creating
3895 shared libraries and symbol visibility changes render the
3896 symbol local.
3897
3898 If on the other hand, we are creating an executable, we
3899 may need to keep relocations for symbols satisfied by a
3900 dynamic library if we manage to avoid copy relocs for the
3901 symbol. */
3902 if ((info->shared
3903 && (must_be_dyn_reloc (info, r_type)
3904 || (h != NULL
3905 && (! info->symbolic
3906 || h->root.type == bfd_link_hash_defweak
3907 || !h->def_regular))))
3908 || (ELIMINATE_COPY_RELOCS
3909 && !info->shared
3910 && h != NULL
3911 && (h->root.type == bfd_link_hash_defweak
3912 || !h->def_regular)))
3913 {
3914 struct elf_dyn_relocs *p;
3915 struct elf_dyn_relocs **rel_head;
3916
3917 #ifdef DEBUG
3918 fprintf (stderr,
3919 "ppc_elf_check_relocs needs to "
3920 "create relocation for %s\n",
3921 (h && h->root.root.string
3922 ? h->root.root.string : "<unknown>"));
3923 #endif
3924 if (sreloc == NULL)
3925 {
3926 if (htab->elf.dynobj == NULL)
3927 htab->elf.dynobj = abfd;
3928
3929 sreloc = _bfd_elf_make_dynamic_reloc_section
3930 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3931
3932 if (sreloc == NULL)
3933 return FALSE;
3934 }
3935
3936 /* If this is a global symbol, we count the number of
3937 relocations we need for this symbol. */
3938 if (h != NULL)
3939 {
3940 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3941 }
3942 else
3943 {
3944 /* Track dynamic relocs needed for local syms too.
3945 We really need local syms available to do this
3946 easily. Oh well. */
3947 asection *s;
3948 void *vpp;
3949 Elf_Internal_Sym *isym;
3950
3951 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3952 abfd, r_symndx);
3953 if (isym == NULL)
3954 return FALSE;
3955
3956 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3957 if (s == NULL)
3958 s = sec;
3959
3960 vpp = &elf_section_data (s)->local_dynrel;
3961 rel_head = (struct elf_dyn_relocs **) vpp;
3962 }
3963
3964 p = *rel_head;
3965 if (p == NULL || p->sec != sec)
3966 {
3967 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3968 if (p == NULL)
3969 return FALSE;
3970 p->next = *rel_head;
3971 *rel_head = p;
3972 p->sec = sec;
3973 p->count = 0;
3974 p->pc_count = 0;
3975 }
3976
3977 p->count += 1;
3978 if (!must_be_dyn_reloc (info, r_type))
3979 p->pc_count += 1;
3980 }
3981
3982 break;
3983 }
3984 }
3985
3986 return TRUE;
3987 }
3988 \f
3989
3990 /* Merge object attributes from IBFD into OBFD. Raise an error if
3991 there are conflicting attributes. */
3992 static bfd_boolean
3993 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3994 {
3995 obj_attribute *in_attr, *in_attrs;
3996 obj_attribute *out_attr, *out_attrs;
3997
3998 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3999 {
4000 /* This is the first object. Copy the attributes. */
4001 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4002
4003 /* Use the Tag_null value to indicate the attributes have been
4004 initialized. */
4005 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4006
4007 return TRUE;
4008 }
4009
4010 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4011 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4012
4013 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4014 non-conflicting ones. */
4015 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4016 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4017 if (in_attr->i != out_attr->i)
4018 {
4019 out_attr->type = 1;
4020 if (out_attr->i == 0)
4021 out_attr->i = in_attr->i;
4022 else if (in_attr->i == 0)
4023 ;
4024 else if (out_attr->i == 1 && in_attr->i == 2)
4025 _bfd_error_handler
4026 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4027 else if (out_attr->i == 1 && in_attr->i == 3)
4028 _bfd_error_handler
4029 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4030 obfd, ibfd);
4031 else if (out_attr->i == 3 && in_attr->i == 1)
4032 _bfd_error_handler
4033 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4034 ibfd, obfd);
4035 else if (out_attr->i == 3 && in_attr->i == 2)
4036 _bfd_error_handler
4037 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4038 ibfd, obfd);
4039 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4040 _bfd_error_handler
4041 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4042 else if (in_attr->i > 3)
4043 _bfd_error_handler
4044 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4045 in_attr->i);
4046 else
4047 _bfd_error_handler
4048 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4049 out_attr->i);
4050 }
4051
4052 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4053 merge non-conflicting ones. */
4054 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4055 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4056 if (in_attr->i != out_attr->i)
4057 {
4058 const char *in_abi = NULL, *out_abi = NULL;
4059
4060 switch (in_attr->i)
4061 {
4062 case 1: in_abi = "generic"; break;
4063 case 2: in_abi = "AltiVec"; break;
4064 case 3: in_abi = "SPE"; break;
4065 }
4066
4067 switch (out_attr->i)
4068 {
4069 case 1: out_abi = "generic"; break;
4070 case 2: out_abi = "AltiVec"; break;
4071 case 3: out_abi = "SPE"; break;
4072 }
4073
4074 out_attr->type = 1;
4075 if (out_attr->i == 0)
4076 out_attr->i = in_attr->i;
4077 else if (in_attr->i == 0)
4078 ;
4079 /* For now, allow generic to transition to AltiVec or SPE
4080 without a warning. If GCC marked files with their stack
4081 alignment and used don't-care markings for files which are
4082 not affected by the vector ABI, we could warn about this
4083 case too. */
4084 else if (out_attr->i == 1)
4085 out_attr->i = in_attr->i;
4086 else if (in_attr->i == 1)
4087 ;
4088 else if (in_abi == NULL)
4089 _bfd_error_handler
4090 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4091 in_attr->i);
4092 else if (out_abi == NULL)
4093 _bfd_error_handler
4094 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4095 in_attr->i);
4096 else
4097 _bfd_error_handler
4098 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4099 ibfd, obfd, in_abi, out_abi);
4100 }
4101
4102 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4103 and merge non-conflicting ones. */
4104 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4105 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4106 if (in_attr->i != out_attr->i)
4107 {
4108 out_attr->type = 1;
4109 if (out_attr->i == 0)
4110 out_attr->i = in_attr->i;
4111 else if (in_attr->i == 0)
4112 ;
4113 else if (out_attr->i == 1 && in_attr->i == 2)
4114 _bfd_error_handler
4115 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4116 else if (out_attr->i == 2 && in_attr->i == 1)
4117 _bfd_error_handler
4118 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4119 else if (in_attr->i > 2)
4120 _bfd_error_handler
4121 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4122 in_attr->i);
4123 else
4124 _bfd_error_handler
4125 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4126 out_attr->i);
4127 }
4128
4129 /* Merge Tag_compatibility attributes and any common GNU ones. */
4130 _bfd_elf_merge_object_attributes (ibfd, obfd);
4131
4132 return TRUE;
4133 }
4134
4135 /* Merge backend specific data from an object file to the output
4136 object file when linking. */
4137
4138 static bfd_boolean
4139 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4140 {
4141 flagword old_flags;
4142 flagword new_flags;
4143 bfd_boolean error;
4144
4145 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4146 return TRUE;
4147
4148 /* Check if we have the same endianness. */
4149 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4150 return FALSE;
4151
4152 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4153 return FALSE;
4154
4155 new_flags = elf_elfheader (ibfd)->e_flags;
4156 old_flags = elf_elfheader (obfd)->e_flags;
4157 if (!elf_flags_init (obfd))
4158 {
4159 /* First call, no flags set. */
4160 elf_flags_init (obfd) = TRUE;
4161 elf_elfheader (obfd)->e_flags = new_flags;
4162 }
4163
4164 /* Compatible flags are ok. */
4165 else if (new_flags == old_flags)
4166 ;
4167
4168 /* Incompatible flags. */
4169 else
4170 {
4171 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4172 to be linked with either. */
4173 error = FALSE;
4174 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4175 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4176 {
4177 error = TRUE;
4178 (*_bfd_error_handler)
4179 (_("%B: compiled with -mrelocatable and linked with "
4180 "modules compiled normally"), ibfd);
4181 }
4182 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4183 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4184 {
4185 error = TRUE;
4186 (*_bfd_error_handler)
4187 (_("%B: compiled normally and linked with "
4188 "modules compiled with -mrelocatable"), ibfd);
4189 }
4190
4191 /* The output is -mrelocatable-lib iff both the input files are. */
4192 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4193 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4194
4195 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4196 but each input file is either -mrelocatable or -mrelocatable-lib. */
4197 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4198 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4199 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4200 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4201
4202 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4203 any module uses it. */
4204 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4205
4206 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4207 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4208
4209 /* Warn about any other mismatches. */
4210 if (new_flags != old_flags)
4211 {
4212 error = TRUE;
4213 (*_bfd_error_handler)
4214 (_("%B: uses different e_flags (0x%lx) fields "
4215 "than previous modules (0x%lx)"),
4216 ibfd, (long) new_flags, (long) old_flags);
4217 }
4218
4219 if (error)
4220 {
4221 bfd_set_error (bfd_error_bad_value);
4222 return FALSE;
4223 }
4224 }
4225
4226 return TRUE;
4227 }
4228 \f
4229 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4230 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4231 int
4232 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4233 struct bfd_link_info *info,
4234 enum ppc_elf_plt_type plt_style,
4235 int emit_stub_syms)
4236 {
4237 struct ppc_elf_link_hash_table *htab;
4238 flagword flags;
4239
4240 htab = ppc_elf_hash_table (info);
4241
4242 htab->emit_stub_syms = emit_stub_syms;
4243
4244 if (htab->plt_type == PLT_UNSET)
4245 {
4246 if (plt_style == PLT_OLD)
4247 htab->plt_type = PLT_OLD;
4248 else
4249 {
4250 bfd *ibfd;
4251 enum ppc_elf_plt_type plt_type = plt_style;
4252
4253 /* Look through the reloc flags left by ppc_elf_check_relocs.
4254 Use the old style bss plt if a file makes plt calls
4255 without using the new relocs, and if ld isn't given
4256 --secure-plt and we never see REL16 relocs. */
4257 if (plt_type == PLT_UNSET)
4258 plt_type = PLT_OLD;
4259 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4260 if (is_ppc_elf (ibfd))
4261 {
4262 if (ppc_elf_tdata (ibfd)->has_rel16)
4263 plt_type = PLT_NEW;
4264 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4265 {
4266 plt_type = PLT_OLD;
4267 htab->old_bfd = ibfd;
4268 break;
4269 }
4270 }
4271 htab->plt_type = plt_type;
4272 }
4273 }
4274 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4275 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4276
4277 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4278
4279 if (htab->plt_type == PLT_NEW)
4280 {
4281 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4282 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4283
4284 /* The new PLT is a loaded section. */
4285 if (htab->plt != NULL
4286 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4287 return -1;
4288
4289 /* The new GOT is not executable. */
4290 if (htab->got != NULL
4291 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4292 return -1;
4293 }
4294 else
4295 {
4296 /* Stop an unused .glink section from affecting .text alignment. */
4297 if (htab->glink != NULL
4298 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4299 return -1;
4300 }
4301 return htab->plt_type == PLT_NEW;
4302 }
4303 \f
4304 /* Return the section that should be marked against GC for a given
4305 relocation. */
4306
4307 static asection *
4308 ppc_elf_gc_mark_hook (asection *sec,
4309 struct bfd_link_info *info,
4310 Elf_Internal_Rela *rel,
4311 struct elf_link_hash_entry *h,
4312 Elf_Internal_Sym *sym)
4313 {
4314 if (h != NULL)
4315 switch (ELF32_R_TYPE (rel->r_info))
4316 {
4317 case R_PPC_GNU_VTINHERIT:
4318 case R_PPC_GNU_VTENTRY:
4319 return NULL;
4320 }
4321
4322 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4323 }
4324
4325 /* Update the got, plt and dynamic reloc reference counts for the
4326 section being removed. */
4327
4328 static bfd_boolean
4329 ppc_elf_gc_sweep_hook (bfd *abfd,
4330 struct bfd_link_info *info,
4331 asection *sec,
4332 const Elf_Internal_Rela *relocs)
4333 {
4334 struct ppc_elf_link_hash_table *htab;
4335 Elf_Internal_Shdr *symtab_hdr;
4336 struct elf_link_hash_entry **sym_hashes;
4337 bfd_signed_vma *local_got_refcounts;
4338 const Elf_Internal_Rela *rel, *relend;
4339 asection *got2;
4340
4341 if (info->relocatable)
4342 return TRUE;
4343
4344 if ((sec->flags & SEC_ALLOC) == 0)
4345 return TRUE;
4346
4347 elf_section_data (sec)->local_dynrel = NULL;
4348
4349 htab = ppc_elf_hash_table (info);
4350 symtab_hdr = &elf_symtab_hdr (abfd);
4351 sym_hashes = elf_sym_hashes (abfd);
4352 local_got_refcounts = elf_local_got_refcounts (abfd);
4353 got2 = bfd_get_section_by_name (abfd, ".got2");
4354
4355 relend = relocs + sec->reloc_count;
4356 for (rel = relocs; rel < relend; rel++)
4357 {
4358 unsigned long r_symndx;
4359 enum elf_ppc_reloc_type r_type;
4360 struct elf_link_hash_entry *h = NULL;
4361
4362 r_symndx = ELF32_R_SYM (rel->r_info);
4363 if (r_symndx >= symtab_hdr->sh_info)
4364 {
4365 struct elf_dyn_relocs **pp, *p;
4366 struct ppc_elf_link_hash_entry *eh;
4367
4368 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4369 while (h->root.type == bfd_link_hash_indirect
4370 || h->root.type == bfd_link_hash_warning)
4371 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4372 eh = (struct ppc_elf_link_hash_entry *) h;
4373
4374 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4375 if (p->sec == sec)
4376 {
4377 /* Everything must go for SEC. */
4378 *pp = p->next;
4379 break;
4380 }
4381 }
4382
4383 r_type = ELF32_R_TYPE (rel->r_info);
4384 if (!htab->is_vxworks
4385 && h == NULL
4386 && local_got_refcounts != NULL
4387 && (!info->shared
4388 || is_branch_reloc (r_type)))
4389 {
4390 struct plt_entry **local_plt = (struct plt_entry **)
4391 (local_got_refcounts + symtab_hdr->sh_info);
4392 char *local_got_tls_masks = (char *)
4393 (local_plt + symtab_hdr->sh_info);
4394 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4395 {
4396 struct plt_entry **ifunc = local_plt + r_symndx;
4397 bfd_vma addend = 0;
4398 struct plt_entry *ent;
4399
4400 if (r_type == R_PPC_PLTREL24 && info->shared)
4401 addend = rel->r_addend;
4402 ent = find_plt_ent (ifunc, got2, addend);
4403 if (ent->plt.refcount > 0)
4404 ent->plt.refcount -= 1;
4405 continue;
4406 }
4407 }
4408
4409 switch (r_type)
4410 {
4411 case R_PPC_GOT_TLSLD16:
4412 case R_PPC_GOT_TLSLD16_LO:
4413 case R_PPC_GOT_TLSLD16_HI:
4414 case R_PPC_GOT_TLSLD16_HA:
4415 case R_PPC_GOT_TLSGD16:
4416 case R_PPC_GOT_TLSGD16_LO:
4417 case R_PPC_GOT_TLSGD16_HI:
4418 case R_PPC_GOT_TLSGD16_HA:
4419 case R_PPC_GOT_TPREL16:
4420 case R_PPC_GOT_TPREL16_LO:
4421 case R_PPC_GOT_TPREL16_HI:
4422 case R_PPC_GOT_TPREL16_HA:
4423 case R_PPC_GOT_DTPREL16:
4424 case R_PPC_GOT_DTPREL16_LO:
4425 case R_PPC_GOT_DTPREL16_HI:
4426 case R_PPC_GOT_DTPREL16_HA:
4427 case R_PPC_GOT16:
4428 case R_PPC_GOT16_LO:
4429 case R_PPC_GOT16_HI:
4430 case R_PPC_GOT16_HA:
4431 if (h != NULL)
4432 {
4433 if (h->got.refcount > 0)
4434 h->got.refcount--;
4435 if (!info->shared)
4436 {
4437 struct plt_entry *ent;
4438
4439 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4440 if (ent != NULL && ent->plt.refcount > 0)
4441 ent->plt.refcount -= 1;
4442 }
4443 }
4444 else if (local_got_refcounts != NULL)
4445 {
4446 if (local_got_refcounts[r_symndx] > 0)
4447 local_got_refcounts[r_symndx]--;
4448 }
4449 break;
4450
4451 case R_PPC_REL24:
4452 case R_PPC_REL14:
4453 case R_PPC_REL14_BRTAKEN:
4454 case R_PPC_REL14_BRNTAKEN:
4455 case R_PPC_REL32:
4456 if (h == NULL || h == htab->elf.hgot)
4457 break;
4458 /* Fall thru */
4459
4460 case R_PPC_ADDR32:
4461 case R_PPC_ADDR24:
4462 case R_PPC_ADDR16:
4463 case R_PPC_ADDR16_LO:
4464 case R_PPC_ADDR16_HI:
4465 case R_PPC_ADDR16_HA:
4466 case R_PPC_ADDR14:
4467 case R_PPC_ADDR14_BRTAKEN:
4468 case R_PPC_ADDR14_BRNTAKEN:
4469 case R_PPC_UADDR32:
4470 case R_PPC_UADDR16:
4471 if (info->shared)
4472 break;
4473
4474 case R_PPC_PLT32:
4475 case R_PPC_PLTREL24:
4476 case R_PPC_PLTREL32:
4477 case R_PPC_PLT16_LO:
4478 case R_PPC_PLT16_HI:
4479 case R_PPC_PLT16_HA:
4480 if (h != NULL)
4481 {
4482 bfd_vma addend = 0;
4483 struct plt_entry *ent;
4484
4485 if (r_type == R_PPC_PLTREL24 && info->shared)
4486 addend = rel->r_addend;
4487 ent = find_plt_ent (&h->plt.plist, got2, addend);
4488 if (ent != NULL && ent->plt.refcount > 0)
4489 ent->plt.refcount -= 1;
4490 }
4491 break;
4492
4493 default:
4494 break;
4495 }
4496 }
4497 return TRUE;
4498 }
4499 \f
4500 /* Set plt output section type, htab->tls_get_addr, and call the
4501 generic ELF tls_setup function. */
4502
4503 asection *
4504 ppc_elf_tls_setup (bfd *obfd,
4505 struct bfd_link_info *info,
4506 int no_tls_get_addr_opt)
4507 {
4508 struct ppc_elf_link_hash_table *htab;
4509
4510 htab = ppc_elf_hash_table (info);
4511 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4512 FALSE, FALSE, TRUE);
4513 if (!no_tls_get_addr_opt)
4514 {
4515 struct elf_link_hash_entry *opt, *tga;
4516 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4517 FALSE, FALSE, TRUE);
4518 if (opt != NULL
4519 && (opt->root.type == bfd_link_hash_defined
4520 || opt->root.type == bfd_link_hash_defweak))
4521 {
4522 /* If glibc supports an optimized __tls_get_addr call stub,
4523 signalled by the presence of __tls_get_addr_opt, and we'll
4524 be calling __tls_get_addr via a plt call stub, then
4525 make __tls_get_addr point to __tls_get_addr_opt. */
4526 tga = htab->tls_get_addr;
4527 if (htab->elf.dynamic_sections_created
4528 && tga != NULL
4529 && (tga->type == STT_FUNC
4530 || tga->needs_plt)
4531 && !(SYMBOL_CALLS_LOCAL (info, tga)
4532 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4533 && tga->root.type == bfd_link_hash_undefweak)))
4534 {
4535 struct plt_entry *ent;
4536 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4537 if (ent->plt.refcount > 0)
4538 break;
4539 if (ent != NULL)
4540 {
4541 tga->root.type = bfd_link_hash_indirect;
4542 tga->root.u.i.link = &opt->root;
4543 ppc_elf_copy_indirect_symbol (info, opt, tga);
4544 if (opt->dynindx != -1)
4545 {
4546 /* Use __tls_get_addr_opt in dynamic relocations. */
4547 opt->dynindx = -1;
4548 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4549 opt->dynstr_index);
4550 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4551 return FALSE;
4552 }
4553 htab->tls_get_addr = opt;
4554 }
4555 }
4556 }
4557 else
4558 no_tls_get_addr_opt = TRUE;
4559 }
4560 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4561 if (htab->plt_type == PLT_NEW
4562 && htab->plt != NULL
4563 && htab->plt->output_section != NULL)
4564 {
4565 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4566 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4567 }
4568
4569 return _bfd_elf_tls_setup (obfd, info);
4570 }
4571
4572 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4573 HASH. */
4574
4575 static bfd_boolean
4576 branch_reloc_hash_match (const bfd *ibfd,
4577 const Elf_Internal_Rela *rel,
4578 const struct elf_link_hash_entry *hash)
4579 {
4580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4581 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4582 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4583
4584 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4585 {
4586 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4587 struct elf_link_hash_entry *h;
4588
4589 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4590 while (h->root.type == bfd_link_hash_indirect
4591 || h->root.type == bfd_link_hash_warning)
4592 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4593 if (h == hash)
4594 return TRUE;
4595 }
4596 return FALSE;
4597 }
4598
4599 /* Run through all the TLS relocs looking for optimization
4600 opportunities. */
4601
4602 bfd_boolean
4603 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4604 struct bfd_link_info *info)
4605 {
4606 bfd *ibfd;
4607 asection *sec;
4608 struct ppc_elf_link_hash_table *htab;
4609 int pass;
4610
4611 if (info->relocatable || !info->executable)
4612 return TRUE;
4613
4614 htab = ppc_elf_hash_table (info);
4615 if (htab == NULL)
4616 return FALSE;
4617
4618 /* Make two passes through the relocs. First time check that tls
4619 relocs involved in setting up a tls_get_addr call are indeed
4620 followed by such a call. If they are not, don't do any tls
4621 optimization. On the second pass twiddle tls_mask flags to
4622 notify relocate_section that optimization can be done, and
4623 adjust got and plt refcounts. */
4624 for (pass = 0; pass < 2; ++pass)
4625 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4626 {
4627 Elf_Internal_Sym *locsyms = NULL;
4628 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4629 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4630
4631 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4632 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4633 {
4634 Elf_Internal_Rela *relstart, *rel, *relend;
4635 int expecting_tls_get_addr = 0;
4636
4637 /* Read the relocations. */
4638 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4639 info->keep_memory);
4640 if (relstart == NULL)
4641 return FALSE;
4642
4643 relend = relstart + sec->reloc_count;
4644 for (rel = relstart; rel < relend; rel++)
4645 {
4646 enum elf_ppc_reloc_type r_type;
4647 unsigned long r_symndx;
4648 struct elf_link_hash_entry *h = NULL;
4649 char *tls_mask;
4650 char tls_set, tls_clear;
4651 bfd_boolean is_local;
4652 bfd_signed_vma *got_count;
4653
4654 r_symndx = ELF32_R_SYM (rel->r_info);
4655 if (r_symndx >= symtab_hdr->sh_info)
4656 {
4657 struct elf_link_hash_entry **sym_hashes;
4658
4659 sym_hashes = elf_sym_hashes (ibfd);
4660 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4661 while (h->root.type == bfd_link_hash_indirect
4662 || h->root.type == bfd_link_hash_warning)
4663 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4664 }
4665
4666 is_local = FALSE;
4667 if (h == NULL
4668 || !h->def_dynamic)
4669 is_local = TRUE;
4670
4671 r_type = ELF32_R_TYPE (rel->r_info);
4672 /* If this section has old-style __tls_get_addr calls
4673 without marker relocs, then check that each
4674 __tls_get_addr call reloc is preceded by a reloc
4675 that conceivably belongs to the __tls_get_addr arg
4676 setup insn. If we don't find matching arg setup
4677 relocs, don't do any tls optimization. */
4678 if (pass == 0
4679 && sec->has_tls_get_addr_call
4680 && h != NULL
4681 && h == htab->tls_get_addr
4682 && !expecting_tls_get_addr
4683 && is_branch_reloc (r_type))
4684 {
4685 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
4686 "TLS optimization disabled\n",
4687 ibfd, sec, rel->r_offset);
4688 if (elf_section_data (sec)->relocs != relstart)
4689 free (relstart);
4690 return TRUE;
4691 }
4692
4693 expecting_tls_get_addr = 0;
4694 switch (r_type)
4695 {
4696 case R_PPC_GOT_TLSLD16:
4697 case R_PPC_GOT_TLSLD16_LO:
4698 expecting_tls_get_addr = 1;
4699 /* Fall thru */
4700
4701 case R_PPC_GOT_TLSLD16_HI:
4702 case R_PPC_GOT_TLSLD16_HA:
4703 /* These relocs should never be against a symbol
4704 defined in a shared lib. Leave them alone if
4705 that turns out to be the case. */
4706 if (!is_local)
4707 continue;
4708
4709 /* LD -> LE */
4710 tls_set = 0;
4711 tls_clear = TLS_LD;
4712 break;
4713
4714 case R_PPC_GOT_TLSGD16:
4715 case R_PPC_GOT_TLSGD16_LO:
4716 expecting_tls_get_addr = 1;
4717 /* Fall thru */
4718
4719 case R_PPC_GOT_TLSGD16_HI:
4720 case R_PPC_GOT_TLSGD16_HA:
4721 if (is_local)
4722 /* GD -> LE */
4723 tls_set = 0;
4724 else
4725 /* GD -> IE */
4726 tls_set = TLS_TLS | TLS_TPRELGD;
4727 tls_clear = TLS_GD;
4728 break;
4729
4730 case R_PPC_GOT_TPREL16:
4731 case R_PPC_GOT_TPREL16_LO:
4732 case R_PPC_GOT_TPREL16_HI:
4733 case R_PPC_GOT_TPREL16_HA:
4734 if (is_local)
4735 {
4736 /* IE -> LE */
4737 tls_set = 0;
4738 tls_clear = TLS_TPREL;
4739 break;
4740 }
4741 else
4742 continue;
4743
4744 case R_PPC_TLSGD:
4745 case R_PPC_TLSLD:
4746 expecting_tls_get_addr = 2;
4747 tls_set = 0;
4748 tls_clear = 0;
4749 break;
4750
4751 default:
4752 continue;
4753 }
4754
4755 if (pass == 0)
4756 {
4757 if (!expecting_tls_get_addr
4758 || (expecting_tls_get_addr == 1
4759 && !sec->has_tls_get_addr_call))
4760 continue;
4761
4762 if (rel + 1 < relend
4763 && branch_reloc_hash_match (ibfd, rel + 1,
4764 htab->tls_get_addr))
4765 continue;
4766
4767 /* Uh oh, we didn't find the expected call. We
4768 could just mark this symbol to exclude it
4769 from tls optimization but it's safer to skip
4770 the entire optimization. */
4771 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
4772 "TLS optimization disabled\n"),
4773 ibfd, sec, rel->r_offset);
4774 if (elf_section_data (sec)->relocs != relstart)
4775 free (relstart);
4776 return TRUE;
4777 }
4778
4779 if (expecting_tls_get_addr)
4780 {
4781 struct plt_entry *ent;
4782 bfd_vma addend = 0;
4783
4784 if (info->shared
4785 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4786 addend = rel[1].r_addend;
4787 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4788 got2, addend);
4789 if (ent != NULL && ent->plt.refcount > 0)
4790 ent->plt.refcount -= 1;
4791
4792 if (expecting_tls_get_addr == 2)
4793 continue;
4794 }
4795
4796 if (h != NULL)
4797 {
4798 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4799 got_count = &h->got.refcount;
4800 }
4801 else
4802 {
4803 bfd_signed_vma *lgot_refs;
4804 struct plt_entry **local_plt;
4805 char *lgot_masks;
4806
4807 if (locsyms == NULL)
4808 {
4809 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4810 if (locsyms == NULL)
4811 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4812 symtab_hdr->sh_info,
4813 0, NULL, NULL, NULL);
4814 if (locsyms == NULL)
4815 {
4816 if (elf_section_data (sec)->relocs != relstart)
4817 free (relstart);
4818 return FALSE;
4819 }
4820 }
4821 lgot_refs = elf_local_got_refcounts (ibfd);
4822 if (lgot_refs == NULL)
4823 abort ();
4824 local_plt = (struct plt_entry **)
4825 (lgot_refs + symtab_hdr->sh_info);
4826 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4827 tls_mask = &lgot_masks[r_symndx];
4828 got_count = &lgot_refs[r_symndx];
4829 }
4830
4831 if (tls_set == 0)
4832 {
4833 /* We managed to get rid of a got entry. */
4834 if (*got_count > 0)
4835 *got_count -= 1;
4836 }
4837
4838 *tls_mask |= tls_set;
4839 *tls_mask &= ~tls_clear;
4840 }
4841
4842 if (elf_section_data (sec)->relocs != relstart)
4843 free (relstart);
4844 }
4845
4846 if (locsyms != NULL
4847 && (symtab_hdr->contents != (unsigned char *) locsyms))
4848 {
4849 if (!info->keep_memory)
4850 free (locsyms);
4851 else
4852 symtab_hdr->contents = (unsigned char *) locsyms;
4853 }
4854 }
4855 return TRUE;
4856 }
4857 \f
4858 /* Return true if we have dynamic relocs that apply to read-only sections. */
4859
4860 static bfd_boolean
4861 readonly_dynrelocs (struct elf_link_hash_entry *h)
4862 {
4863 struct elf_dyn_relocs *p;
4864
4865 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4866 {
4867 asection *s = p->sec->output_section;
4868
4869 if (s != NULL
4870 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4871 == (SEC_READONLY | SEC_ALLOC)))
4872 return TRUE;
4873 }
4874 return FALSE;
4875 }
4876
4877 /* Adjust a symbol defined by a dynamic object and referenced by a
4878 regular object. The current definition is in some section of the
4879 dynamic object, but we're not including those sections. We have to
4880 change the definition to something the rest of the link can
4881 understand. */
4882
4883 static bfd_boolean
4884 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4885 struct elf_link_hash_entry *h)
4886 {
4887 struct ppc_elf_link_hash_table *htab;
4888 asection *s;
4889
4890 #ifdef DEBUG
4891 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4892 h->root.root.string);
4893 #endif
4894
4895 /* Make sure we know what is going on here. */
4896 htab = ppc_elf_hash_table (info);
4897 BFD_ASSERT (htab->elf.dynobj != NULL
4898 && (h->needs_plt
4899 || h->type == STT_GNU_IFUNC
4900 || h->u.weakdef != NULL
4901 || (h->def_dynamic
4902 && h->ref_regular
4903 && !h->def_regular)));
4904
4905 /* Deal with function syms. */
4906 if (h->type == STT_FUNC
4907 || h->type == STT_GNU_IFUNC
4908 || h->needs_plt)
4909 {
4910 /* Clear procedure linkage table information for any symbol that
4911 won't need a .plt entry. */
4912 struct plt_entry *ent;
4913 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4914 if (ent->plt.refcount > 0)
4915 break;
4916 if (ent == NULL
4917 || (h->type != STT_GNU_IFUNC
4918 && (SYMBOL_CALLS_LOCAL (info, h)
4919 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4920 && h->root.type == bfd_link_hash_undefweak))))
4921 {
4922 /* A PLT entry is not required/allowed when:
4923
4924 1. We are not using ld.so; because then the PLT entry
4925 can't be set up, so we can't use one. In this case,
4926 ppc_elf_adjust_dynamic_symbol won't even be called.
4927
4928 2. GC has rendered the entry unused.
4929
4930 3. We know for certain that a call to this symbol
4931 will go to this object, or will remain undefined. */
4932 h->plt.plist = NULL;
4933 h->needs_plt = 0;
4934 }
4935 else
4936 {
4937 /* After adjust_dynamic_symbol, non_got_ref set in the
4938 non-shared case means that we have allocated space in
4939 .dynbss for the symbol and thus dyn_relocs for this
4940 symbol should be discarded.
4941 If we get here we know we are making a PLT entry for this
4942 symbol, and in an executable we'd normally resolve
4943 relocations against this symbol to the PLT entry. Allow
4944 dynamic relocs if the reference is weak, and the dynamic
4945 relocs will not cause text relocation. */
4946 if (!h->ref_regular_nonweak
4947 && h->non_got_ref
4948 && h->type != STT_GNU_IFUNC
4949 && !htab->is_vxworks
4950 && !ppc_elf_hash_entry (h)->has_sda_refs
4951 && !readonly_dynrelocs (h))
4952 h->non_got_ref = 0;
4953 }
4954 return TRUE;
4955 }
4956 else
4957 h->plt.plist = NULL;
4958
4959 /* If this is a weak symbol, and there is a real definition, the
4960 processor independent code will have arranged for us to see the
4961 real definition first, and we can just use the same value. */
4962 if (h->u.weakdef != NULL)
4963 {
4964 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4965 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4966 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4967 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4968 if (ELIMINATE_COPY_RELOCS)
4969 h->non_got_ref = h->u.weakdef->non_got_ref;
4970 return TRUE;
4971 }
4972
4973 /* This is a reference to a symbol defined by a dynamic object which
4974 is not a function. */
4975
4976 /* If we are creating a shared library, we must presume that the
4977 only references to the symbol are via the global offset table.
4978 For such cases we need not do anything here; the relocations will
4979 be handled correctly by relocate_section. */
4980 if (info->shared)
4981 return TRUE;
4982
4983 /* If there are no references to this symbol that do not use the
4984 GOT, we don't need to generate a copy reloc. */
4985 if (!h->non_got_ref)
4986 return TRUE;
4987
4988 /* If we didn't find any dynamic relocs in read-only sections, then
4989 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4990 We can't do this if there are any small data relocations. This
4991 doesn't work on VxWorks, where we can not have dynamic
4992 relocations (other than copy and jump slot relocations) in an
4993 executable. */
4994 if (ELIMINATE_COPY_RELOCS
4995 && !ppc_elf_hash_entry (h)->has_sda_refs
4996 && !htab->is_vxworks
4997 && !h->def_regular
4998 && !readonly_dynrelocs (h))
4999 {
5000 h->non_got_ref = 0;
5001 return TRUE;
5002 }
5003
5004 if (h->size == 0)
5005 {
5006 info->callbacks->einfo (_("dynamic variable `%s' is zero size\n"),
5007 h->root.root.string);
5008 return TRUE;
5009 }
5010
5011 /* We must allocate the symbol in our .dynbss section, which will
5012 become part of the .bss section of the executable. There will be
5013 an entry for this symbol in the .dynsym section. The dynamic
5014 object will contain position independent code, so all references
5015 from the dynamic object to this symbol will go through the global
5016 offset table. The dynamic linker will use the .dynsym entry to
5017 determine the address it must put in the global offset table, so
5018 both the dynamic object and the regular object will refer to the
5019 same memory location for the variable.
5020
5021 Of course, if the symbol is referenced using SDAREL relocs, we
5022 must instead allocate it in .sbss. */
5023
5024 if (ppc_elf_hash_entry (h)->has_sda_refs)
5025 s = htab->dynsbss;
5026 else
5027 s = htab->dynbss;
5028 BFD_ASSERT (s != NULL);
5029
5030 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5031 copy the initial value out of the dynamic object and into the
5032 runtime process image. We need to remember the offset into the
5033 .rela.bss section we are going to use. */
5034 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5035 {
5036 asection *srel;
5037
5038 if (ppc_elf_hash_entry (h)->has_sda_refs)
5039 srel = htab->relsbss;
5040 else
5041 srel = htab->relbss;
5042 BFD_ASSERT (srel != NULL);
5043 srel->size += sizeof (Elf32_External_Rela);
5044 h->needs_copy = 1;
5045 }
5046
5047 return _bfd_elf_adjust_dynamic_copy (h, s);
5048 }
5049 \f
5050 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5051 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5052 specifying the addend on the plt relocation. For -fpic code, the sym
5053 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5054 xxxxxxxx.got2.plt_pic32.<callee>. */
5055
5056 static bfd_boolean
5057 add_stub_sym (struct plt_entry *ent,
5058 struct elf_link_hash_entry *h,
5059 struct bfd_link_info *info)
5060 {
5061 struct elf_link_hash_entry *sh;
5062 size_t len1, len2, len3;
5063 char *name;
5064 const char *stub;
5065 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5066
5067 if (info->shared)
5068 stub = ".plt_pic32.";
5069 else
5070 stub = ".plt_call32.";
5071
5072 len1 = strlen (h->root.root.string);
5073 len2 = strlen (stub);
5074 len3 = 0;
5075 if (ent->sec)
5076 len3 = strlen (ent->sec->name);
5077 name = bfd_malloc (len1 + len2 + len3 + 9);
5078 if (name == NULL)
5079 return FALSE;
5080 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5081 if (ent->sec)
5082 memcpy (name + 8, ent->sec->name, len3);
5083 memcpy (name + 8 + len3, stub, len2);
5084 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5085 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5086 if (sh == NULL)
5087 return FALSE;
5088 if (sh->root.type == bfd_link_hash_new)
5089 {
5090 sh->root.type = bfd_link_hash_defined;
5091 sh->root.u.def.section = htab->glink;
5092 sh->root.u.def.value = ent->glink_offset;
5093 sh->ref_regular = 1;
5094 sh->def_regular = 1;
5095 sh->ref_regular_nonweak = 1;
5096 sh->forced_local = 1;
5097 sh->non_elf = 0;
5098 }
5099 return TRUE;
5100 }
5101
5102 /* Allocate NEED contiguous space in .got, and return the offset.
5103 Handles allocation of the got header when crossing 32k. */
5104
5105 static bfd_vma
5106 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5107 {
5108 bfd_vma where;
5109 unsigned int max_before_header;
5110
5111 if (htab->plt_type == PLT_VXWORKS)
5112 {
5113 where = htab->got->size;
5114 htab->got->size += need;
5115 }
5116 else
5117 {
5118 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5119 if (need <= htab->got_gap)
5120 {
5121 where = max_before_header - htab->got_gap;
5122 htab->got_gap -= need;
5123 }
5124 else
5125 {
5126 if (htab->got->size + need > max_before_header
5127 && htab->got->size <= max_before_header)
5128 {
5129 htab->got_gap = max_before_header - htab->got->size;
5130 htab->got->size = max_before_header + htab->got_header_size;
5131 }
5132 where = htab->got->size;
5133 htab->got->size += need;
5134 }
5135 }
5136 return where;
5137 }
5138
5139 /* Allocate space in associated reloc sections for dynamic relocs. */
5140
5141 static bfd_boolean
5142 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5143 {
5144 struct bfd_link_info *info = inf;
5145 struct ppc_elf_link_hash_entry *eh;
5146 struct ppc_elf_link_hash_table *htab;
5147 struct elf_dyn_relocs *p;
5148
5149 if (h->root.type == bfd_link_hash_indirect)
5150 return TRUE;
5151
5152 htab = ppc_elf_hash_table (info);
5153 if (htab->elf.dynamic_sections_created
5154 || h->type == STT_GNU_IFUNC)
5155 {
5156 struct plt_entry *ent;
5157 bfd_boolean doneone = FALSE;
5158 bfd_vma plt_offset = 0, glink_offset = 0;
5159 bfd_boolean dyn;
5160
5161 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5162 if (ent->plt.refcount > 0)
5163 {
5164 /* Make sure this symbol is output as a dynamic symbol. */
5165 if (h->dynindx == -1
5166 && !h->forced_local
5167 && !h->def_regular
5168 && htab->elf.dynamic_sections_created)
5169 {
5170 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5171 return FALSE;
5172 }
5173
5174 dyn = htab->elf.dynamic_sections_created;
5175 if (info->shared
5176 || h->type == STT_GNU_IFUNC
5177 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5178 {
5179 asection *s = htab->plt;
5180 if (!dyn || h->dynindx == -1)
5181 s = htab->iplt;
5182
5183 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5184 {
5185 if (!doneone)
5186 {
5187 plt_offset = s->size;
5188 s->size += 4;
5189 }
5190 ent->plt.offset = plt_offset;
5191
5192 s = htab->glink;
5193 if (!doneone || info->shared)
5194 {
5195 glink_offset = s->size;
5196 s->size += GLINK_ENTRY_SIZE;
5197 if (h == htab->tls_get_addr
5198 && !htab->no_tls_get_addr_opt)
5199 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5200 }
5201 if (!doneone
5202 && !info->shared
5203 && h->def_dynamic
5204 && !h->def_regular)
5205 {
5206 h->root.u.def.section = s;
5207 h->root.u.def.value = glink_offset;
5208 }
5209 ent->glink_offset = glink_offset;
5210
5211 if (htab->emit_stub_syms
5212 && !add_stub_sym (ent, h, info))
5213 return FALSE;
5214 }
5215 else
5216 {
5217 if (!doneone)
5218 {
5219 /* If this is the first .plt entry, make room
5220 for the special first entry. */
5221 if (s->size == 0)
5222 s->size += htab->plt_initial_entry_size;
5223
5224 /* The PowerPC PLT is actually composed of two
5225 parts, the first part is 2 words (for a load
5226 and a jump), and then there is a remaining
5227 word available at the end. */
5228 plt_offset = (htab->plt_initial_entry_size
5229 + (htab->plt_slot_size
5230 * ((s->size
5231 - htab->plt_initial_entry_size)
5232 / htab->plt_entry_size)));
5233
5234 /* If this symbol is not defined in a regular
5235 file, and we are not generating a shared
5236 library, then set the symbol to this location
5237 in the .plt. This is to avoid text
5238 relocations, and is required to make
5239 function pointers compare as equal between
5240 the normal executable and the shared library. */
5241 if (! info->shared
5242 && h->def_dynamic
5243 && !h->def_regular)
5244 {
5245 h->root.u.def.section = s;
5246 h->root.u.def.value = plt_offset;
5247 }
5248
5249 /* Make room for this entry. */
5250 s->size += htab->plt_entry_size;
5251 /* After the 8192nd entry, room for two entries
5252 is allocated. */
5253 if (htab->plt_type == PLT_OLD
5254 && (s->size - htab->plt_initial_entry_size)
5255 / htab->plt_entry_size
5256 > PLT_NUM_SINGLE_ENTRIES)
5257 s->size += htab->plt_entry_size;
5258 }
5259 ent->plt.offset = plt_offset;
5260 }
5261
5262 /* We also need to make an entry in the .rela.plt section. */
5263 if (!doneone)
5264 {
5265 if (!htab->elf.dynamic_sections_created
5266 || h->dynindx == -1)
5267 htab->reliplt->size += sizeof (Elf32_External_Rela);
5268 else
5269 {
5270 htab->relplt->size += sizeof (Elf32_External_Rela);
5271
5272 if (htab->plt_type == PLT_VXWORKS)
5273 {
5274 /* Allocate space for the unloaded relocations. */
5275 if (!info->shared
5276 && htab->elf.dynamic_sections_created)
5277 {
5278 if (ent->plt.offset
5279 == (bfd_vma) htab->plt_initial_entry_size)
5280 {
5281 htab->srelplt2->size
5282 += (sizeof (Elf32_External_Rela)
5283 * VXWORKS_PLTRESOLVE_RELOCS);
5284 }
5285
5286 htab->srelplt2->size
5287 += (sizeof (Elf32_External_Rela)
5288 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5289 }
5290
5291 /* Every PLT entry has an associated GOT entry in
5292 .got.plt. */
5293 htab->sgotplt->size += 4;
5294 }
5295 }
5296 doneone = TRUE;
5297 }
5298 }
5299 else
5300 ent->plt.offset = (bfd_vma) -1;
5301 }
5302 else
5303 ent->plt.offset = (bfd_vma) -1;
5304
5305 if (!doneone)
5306 {
5307 h->plt.plist = NULL;
5308 h->needs_plt = 0;
5309 }
5310 }
5311 else
5312 {
5313 h->plt.plist = NULL;
5314 h->needs_plt = 0;
5315 }
5316
5317 eh = (struct ppc_elf_link_hash_entry *) h;
5318 if (eh->elf.got.refcount > 0)
5319 {
5320 bfd_boolean dyn;
5321 unsigned int need;
5322
5323 /* Make sure this symbol is output as a dynamic symbol. */
5324 if (eh->elf.dynindx == -1
5325 && !eh->elf.forced_local
5326 && eh->elf.type != STT_GNU_IFUNC
5327 && htab->elf.dynamic_sections_created)
5328 {
5329 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5330 return FALSE;
5331 }
5332
5333 need = 0;
5334 if ((eh->tls_mask & TLS_TLS) != 0)
5335 {
5336 if ((eh->tls_mask & TLS_LD) != 0)
5337 {
5338 if (!eh->elf.def_dynamic)
5339 /* We'll just use htab->tlsld_got.offset. This should
5340 always be the case. It's a little odd if we have
5341 a local dynamic reloc against a non-local symbol. */
5342 htab->tlsld_got.refcount += 1;
5343 else
5344 need += 8;
5345 }
5346 if ((eh->tls_mask & TLS_GD) != 0)
5347 need += 8;
5348 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5349 need += 4;
5350 if ((eh->tls_mask & TLS_DTPREL) != 0)
5351 need += 4;
5352 }
5353 else
5354 need += 4;
5355 if (need == 0)
5356 eh->elf.got.offset = (bfd_vma) -1;
5357 else
5358 {
5359 eh->elf.got.offset = allocate_got (htab, need);
5360 dyn = htab->elf.dynamic_sections_created;
5361 if ((info->shared
5362 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5363 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5364 || eh->elf.root.type != bfd_link_hash_undefweak))
5365 {
5366 asection *rsec = htab->relgot;
5367 /* All the entries we allocated need relocs.
5368 Except LD only needs one. */
5369 if ((eh->tls_mask & TLS_LD) != 0
5370 && eh->elf.def_dynamic)
5371 need -= 4;
5372 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5373 }
5374 }
5375 }
5376 else
5377 eh->elf.got.offset = (bfd_vma) -1;
5378
5379 if (eh->dyn_relocs == NULL
5380 || !htab->elf.dynamic_sections_created)
5381 return TRUE;
5382
5383 /* In the shared -Bsymbolic case, discard space allocated for
5384 dynamic pc-relative relocs against symbols which turn out to be
5385 defined in regular objects. For the normal shared case, discard
5386 space for relocs that have become local due to symbol visibility
5387 changes. */
5388
5389 if (info->shared)
5390 {
5391 /* Relocs that use pc_count are those that appear on a call insn,
5392 or certain REL relocs (see must_be_dyn_reloc) that can be
5393 generated via assembly. We want calls to protected symbols to
5394 resolve directly to the function rather than going via the plt.
5395 If people want function pointer comparisons to work as expected
5396 then they should avoid writing weird assembly. */
5397 if (SYMBOL_CALLS_LOCAL (info, h))
5398 {
5399 struct elf_dyn_relocs **pp;
5400
5401 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5402 {
5403 p->count -= p->pc_count;
5404 p->pc_count = 0;
5405 if (p->count == 0)
5406 *pp = p->next;
5407 else
5408 pp = &p->next;
5409 }
5410 }
5411
5412 if (htab->is_vxworks)
5413 {
5414 struct elf_dyn_relocs **pp;
5415
5416 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5417 {
5418 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5419 *pp = p->next;
5420 else
5421 pp = &p->next;
5422 }
5423 }
5424
5425 /* Discard relocs on undefined symbols that must be local. */
5426 if (eh->dyn_relocs != NULL
5427 && h->root.type == bfd_link_hash_undefined
5428 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5429 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5430 eh->dyn_relocs = NULL;
5431
5432 /* Also discard relocs on undefined weak syms with non-default
5433 visibility. */
5434 if (eh->dyn_relocs != NULL
5435 && h->root.type == bfd_link_hash_undefweak)
5436 {
5437 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5438 eh->dyn_relocs = NULL;
5439
5440 /* Make sure undefined weak symbols are output as a dynamic
5441 symbol in PIEs. */
5442 else if (h->dynindx == -1
5443 && !h->forced_local
5444 && !h->def_regular)
5445 {
5446 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5447 return FALSE;
5448 }
5449 }
5450 }
5451 else if (ELIMINATE_COPY_RELOCS)
5452 {
5453 /* For the non-shared case, discard space for relocs against
5454 symbols which turn out to need copy relocs or are not
5455 dynamic. */
5456
5457 if (!h->non_got_ref
5458 && !h->def_regular)
5459 {
5460 /* Make sure this symbol is output as a dynamic symbol.
5461 Undefined weak syms won't yet be marked as dynamic. */
5462 if (h->dynindx == -1
5463 && !h->forced_local)
5464 {
5465 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5466 return FALSE;
5467 }
5468
5469 /* If that succeeded, we know we'll be keeping all the
5470 relocs. */
5471 if (h->dynindx != -1)
5472 goto keep;
5473 }
5474
5475 eh->dyn_relocs = NULL;
5476
5477 keep: ;
5478 }
5479
5480 /* Finally, allocate space. */
5481 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5482 {
5483 asection *sreloc = elf_section_data (p->sec)->sreloc;
5484 if (!htab->elf.dynamic_sections_created)
5485 sreloc = htab->reliplt;
5486 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5487 }
5488
5489 return TRUE;
5490 }
5491
5492 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5493 read-only sections. */
5494
5495 static bfd_boolean
5496 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5497 {
5498 if (h->root.type == bfd_link_hash_indirect)
5499 return TRUE;
5500
5501 if (readonly_dynrelocs (h))
5502 {
5503 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5504
5505 /* Not an error, just cut short the traversal. */
5506 return FALSE;
5507 }
5508 return TRUE;
5509 }
5510
5511 /* Set the sizes of the dynamic sections. */
5512
5513 static bfd_boolean
5514 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5515 struct bfd_link_info *info)
5516 {
5517 struct ppc_elf_link_hash_table *htab;
5518 asection *s;
5519 bfd_boolean relocs;
5520 bfd *ibfd;
5521
5522 #ifdef DEBUG
5523 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5524 #endif
5525
5526 htab = ppc_elf_hash_table (info);
5527 BFD_ASSERT (htab->elf.dynobj != NULL);
5528
5529 if (elf_hash_table (info)->dynamic_sections_created)
5530 {
5531 /* Set the contents of the .interp section to the interpreter. */
5532 if (info->executable)
5533 {
5534 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5535 BFD_ASSERT (s != NULL);
5536 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5537 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5538 }
5539 }
5540
5541 if (htab->plt_type == PLT_OLD)
5542 htab->got_header_size = 16;
5543 else if (htab->plt_type == PLT_NEW)
5544 htab->got_header_size = 12;
5545
5546 /* Set up .got offsets for local syms, and space for local dynamic
5547 relocs. */
5548 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5549 {
5550 bfd_signed_vma *local_got;
5551 bfd_signed_vma *end_local_got;
5552 struct plt_entry **local_plt;
5553 struct plt_entry **end_local_plt;
5554 char *lgot_masks;
5555 bfd_size_type locsymcount;
5556 Elf_Internal_Shdr *symtab_hdr;
5557
5558 if (!is_ppc_elf (ibfd))
5559 continue;
5560
5561 for (s = ibfd->sections; s != NULL; s = s->next)
5562 {
5563 struct elf_dyn_relocs *p;
5564
5565 for (p = ((struct elf_dyn_relocs *)
5566 elf_section_data (s)->local_dynrel);
5567 p != NULL;
5568 p = p->next)
5569 {
5570 if (!bfd_is_abs_section (p->sec)
5571 && bfd_is_abs_section (p->sec->output_section))
5572 {
5573 /* Input section has been discarded, either because
5574 it is a copy of a linkonce section or due to
5575 linker script /DISCARD/, so we'll be discarding
5576 the relocs too. */
5577 }
5578 else if (htab->is_vxworks
5579 && strcmp (p->sec->output_section->name,
5580 ".tls_vars") == 0)
5581 {
5582 /* Relocations in vxworks .tls_vars sections are
5583 handled specially by the loader. */
5584 }
5585 else if (p->count != 0)
5586 {
5587 asection *sreloc = elf_section_data (p->sec)->sreloc;
5588 if (!htab->elf.dynamic_sections_created)
5589 sreloc = htab->reliplt;
5590 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5591 if ((p->sec->output_section->flags
5592 & (SEC_READONLY | SEC_ALLOC))
5593 == (SEC_READONLY | SEC_ALLOC))
5594 info->flags |= DF_TEXTREL;
5595 }
5596 }
5597 }
5598
5599 local_got = elf_local_got_refcounts (ibfd);
5600 if (!local_got)
5601 continue;
5602
5603 symtab_hdr = &elf_symtab_hdr (ibfd);
5604 locsymcount = symtab_hdr->sh_info;
5605 end_local_got = local_got + locsymcount;
5606 local_plt = (struct plt_entry **) end_local_got;
5607 end_local_plt = local_plt + locsymcount;
5608 lgot_masks = (char *) end_local_plt;
5609
5610 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5611 if (*local_got > 0)
5612 {
5613 unsigned int need = 0;
5614 if ((*lgot_masks & TLS_TLS) != 0)
5615 {
5616 if ((*lgot_masks & TLS_GD) != 0)
5617 need += 8;
5618 if ((*lgot_masks & TLS_LD) != 0)
5619 htab->tlsld_got.refcount += 1;
5620 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5621 need += 4;
5622 if ((*lgot_masks & TLS_DTPREL) != 0)
5623 need += 4;
5624 }
5625 else
5626 need += 4;
5627 if (need == 0)
5628 *local_got = (bfd_vma) -1;
5629 else
5630 {
5631 *local_got = allocate_got (htab, need);
5632 if (info->shared)
5633 htab->relgot->size += (need
5634 * (sizeof (Elf32_External_Rela) / 4));
5635 }
5636 }
5637 else
5638 *local_got = (bfd_vma) -1;
5639
5640 if (htab->is_vxworks)
5641 continue;
5642
5643 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5644 for (; local_plt < end_local_plt; ++local_plt)
5645 {
5646 struct plt_entry *ent;
5647 bfd_boolean doneone = FALSE;
5648 bfd_vma plt_offset = 0, glink_offset = 0;
5649
5650 for (ent = *local_plt; ent != NULL; ent = ent->next)
5651 if (ent->plt.refcount > 0)
5652 {
5653 s = htab->iplt;
5654
5655 if (!doneone)
5656 {
5657 plt_offset = s->size;
5658 s->size += 4;
5659 }
5660 ent->plt.offset = plt_offset;
5661
5662 s = htab->glink;
5663 if (!doneone || info->shared)
5664 {
5665 glink_offset = s->size;
5666 s->size += GLINK_ENTRY_SIZE;
5667 }
5668 ent->glink_offset = glink_offset;
5669
5670 if (!doneone)
5671 {
5672 htab->reliplt->size += sizeof (Elf32_External_Rela);
5673 doneone = TRUE;
5674 }
5675 }
5676 else
5677 ent->plt.offset = (bfd_vma) -1;
5678 }
5679 }
5680
5681 /* Allocate space for global sym dynamic relocs. */
5682 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5683
5684 if (htab->tlsld_got.refcount > 0)
5685 {
5686 htab->tlsld_got.offset = allocate_got (htab, 8);
5687 if (info->shared)
5688 htab->relgot->size += sizeof (Elf32_External_Rela);
5689 }
5690 else
5691 htab->tlsld_got.offset = (bfd_vma) -1;
5692
5693 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5694 {
5695 unsigned int g_o_t = 32768;
5696
5697 /* If we haven't allocated the header, do so now. When we get here,
5698 for old plt/got the got size will be 0 to 32764 (not allocated),
5699 or 32780 to 65536 (header allocated). For new plt/got, the
5700 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5701 if (htab->got->size <= 32768)
5702 {
5703 g_o_t = htab->got->size;
5704 if (htab->plt_type == PLT_OLD)
5705 g_o_t += 4;
5706 htab->got->size += htab->got_header_size;
5707 }
5708
5709 htab->elf.hgot->root.u.def.value = g_o_t;
5710 }
5711 if (info->shared)
5712 {
5713 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5714 if (sda != NULL
5715 && !(sda->root.type == bfd_link_hash_defined
5716 || sda->root.type == bfd_link_hash_defweak))
5717 {
5718 sda->root.type = bfd_link_hash_defined;
5719 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5720 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5721 }
5722 }
5723
5724 if (htab->glink != NULL
5725 && htab->glink->size != 0
5726 && htab->elf.dynamic_sections_created)
5727 {
5728 htab->glink_pltresolve = htab->glink->size;
5729 /* Space for the branch table. */
5730 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5731 /* Pad out to align the start of PLTresolve. */
5732 htab->glink->size += -htab->glink->size & 15;
5733 htab->glink->size += GLINK_PLTRESOLVE;
5734
5735 if (htab->emit_stub_syms)
5736 {
5737 struct elf_link_hash_entry *sh;
5738 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5739 TRUE, FALSE, FALSE);
5740 if (sh == NULL)
5741 return FALSE;
5742 if (sh->root.type == bfd_link_hash_new)
5743 {
5744 sh->root.type = bfd_link_hash_defined;
5745 sh->root.u.def.section = htab->glink;
5746 sh->root.u.def.value = htab->glink_pltresolve;
5747 sh->ref_regular = 1;
5748 sh->def_regular = 1;
5749 sh->ref_regular_nonweak = 1;
5750 sh->forced_local = 1;
5751 sh->non_elf = 0;
5752 }
5753 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5754 TRUE, FALSE, FALSE);
5755 if (sh == NULL)
5756 return FALSE;
5757 if (sh->root.type == bfd_link_hash_new)
5758 {
5759 sh->root.type = bfd_link_hash_defined;
5760 sh->root.u.def.section = htab->glink;
5761 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5762 sh->ref_regular = 1;
5763 sh->def_regular = 1;
5764 sh->ref_regular_nonweak = 1;
5765 sh->forced_local = 1;
5766 sh->non_elf = 0;
5767 }
5768 }
5769 }
5770
5771 /* We've now determined the sizes of the various dynamic sections.
5772 Allocate memory for them. */
5773 relocs = FALSE;
5774 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5775 {
5776 bfd_boolean strip_section = TRUE;
5777
5778 if ((s->flags & SEC_LINKER_CREATED) == 0)
5779 continue;
5780
5781 if (s == htab->plt
5782 || s == htab->got)
5783 {
5784 /* We'd like to strip these sections if they aren't needed, but if
5785 we've exported dynamic symbols from them we must leave them.
5786 It's too late to tell BFD to get rid of the symbols. */
5787 if (htab->elf.hplt != NULL)
5788 strip_section = FALSE;
5789 /* Strip this section if we don't need it; see the
5790 comment below. */
5791 }
5792 else if (s == htab->iplt
5793 || s == htab->glink
5794 || s == htab->sgotplt
5795 || s == htab->sbss
5796 || s == htab->dynbss
5797 || s == htab->dynsbss
5798 || s == htab->sdata[0].section
5799 || s == htab->sdata[1].section)
5800 {
5801 /* Strip these too. */
5802 }
5803 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5804 {
5805 if (s->size != 0)
5806 {
5807 /* Remember whether there are any relocation sections. */
5808 relocs = TRUE;
5809
5810 /* We use the reloc_count field as a counter if we need
5811 to copy relocs into the output file. */
5812 s->reloc_count = 0;
5813 }
5814 }
5815 else
5816 {
5817 /* It's not one of our sections, so don't allocate space. */
5818 continue;
5819 }
5820
5821 if (s->size == 0 && strip_section)
5822 {
5823 /* If we don't need this section, strip it from the
5824 output file. This is mostly to handle .rela.bss and
5825 .rela.plt. We must create both sections in
5826 create_dynamic_sections, because they must be created
5827 before the linker maps input sections to output
5828 sections. The linker does that before
5829 adjust_dynamic_symbol is called, and it is that
5830 function which decides whether anything needs to go
5831 into these sections. */
5832 s->flags |= SEC_EXCLUDE;
5833 continue;
5834 }
5835
5836 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5837 continue;
5838
5839 /* Allocate memory for the section contents. */
5840 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5841 if (s->contents == NULL)
5842 return FALSE;
5843 }
5844
5845 if (htab->elf.dynamic_sections_created)
5846 {
5847 /* Add some entries to the .dynamic section. We fill in the
5848 values later, in ppc_elf_finish_dynamic_sections, but we
5849 must add the entries now so that we get the correct size for
5850 the .dynamic section. The DT_DEBUG entry is filled in by the
5851 dynamic linker and used by the debugger. */
5852 #define add_dynamic_entry(TAG, VAL) \
5853 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5854
5855 if (info->executable)
5856 {
5857 if (!add_dynamic_entry (DT_DEBUG, 0))
5858 return FALSE;
5859 }
5860
5861 if (htab->plt != NULL && htab->plt->size != 0)
5862 {
5863 if (!add_dynamic_entry (DT_PLTGOT, 0)
5864 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5865 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5866 || !add_dynamic_entry (DT_JMPREL, 0))
5867 return FALSE;
5868 }
5869
5870 if (htab->glink != NULL && htab->glink->size != 0)
5871 {
5872 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5873 return FALSE;
5874 if (!htab->no_tls_get_addr_opt
5875 && htab->tls_get_addr != NULL
5876 && htab->tls_get_addr->plt.plist != NULL
5877 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5878 return FALSE;
5879 }
5880
5881 if (relocs)
5882 {
5883 if (!add_dynamic_entry (DT_RELA, 0)
5884 || !add_dynamic_entry (DT_RELASZ, 0)
5885 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5886 return FALSE;
5887 }
5888
5889 /* If any dynamic relocs apply to a read-only section, then we
5890 need a DT_TEXTREL entry. */
5891 if ((info->flags & DF_TEXTREL) == 0)
5892 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5893 info);
5894
5895 if ((info->flags & DF_TEXTREL) != 0)
5896 {
5897 if (!add_dynamic_entry (DT_TEXTREL, 0))
5898 return FALSE;
5899 }
5900 if (htab->is_vxworks
5901 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5902 return FALSE;
5903 }
5904 #undef add_dynamic_entry
5905
5906 return TRUE;
5907 }
5908
5909 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5910
5911 static bfd_boolean
5912 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5913 {
5914 if (h->plt.plist != NULL
5915 && !h->def_regular
5916 && (!h->pointer_equality_needed
5917 || !h->ref_regular_nonweak))
5918 return FALSE;
5919
5920 return _bfd_elf_hash_symbol (h);
5921 }
5922 \f
5923 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5924
5925 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5926 used for some functions that are allowed to break the ABI). */
5927 static const int shared_stub_entry[] =
5928 {
5929 0x7c0802a6, /* mflr 0 */
5930 0x429f0005, /* bcl 20, 31, .Lxxx */
5931 0x7d8802a6, /* mflr 12 */
5932 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5933 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5934 0x7c0803a6, /* mtlr 0 */
5935 0x7d8903a6, /* mtctr 12 */
5936 0x4e800420, /* bctr */
5937 };
5938
5939 static const int stub_entry[] =
5940 {
5941 0x3d800000, /* lis 12,xxx@ha */
5942 0x398c0000, /* addi 12,12,xxx@l */
5943 0x7d8903a6, /* mtctr 12 */
5944 0x4e800420, /* bctr */
5945 };
5946
5947 static bfd_boolean
5948 ppc_elf_relax_section (bfd *abfd,
5949 asection *isec,
5950 struct bfd_link_info *link_info,
5951 bfd_boolean *again)
5952 {
5953 struct one_fixup
5954 {
5955 struct one_fixup *next;
5956 asection *tsec;
5957 /* Final link, can use the symbol offset. For a
5958 relocatable link we use the symbol's index. */
5959 bfd_vma toff;
5960 bfd_vma trampoff;
5961 };
5962
5963 Elf_Internal_Shdr *symtab_hdr;
5964 bfd_byte *contents = NULL;
5965 Elf_Internal_Sym *isymbuf = NULL;
5966 Elf_Internal_Rela *internal_relocs = NULL;
5967 Elf_Internal_Rela *irel, *irelend;
5968 struct one_fixup *fixups = NULL;
5969 unsigned changes = 0;
5970 struct ppc_elf_link_hash_table *htab;
5971 bfd_size_type trampoff;
5972 asection *got2;
5973 bfd_boolean maybe_pasted;
5974
5975 *again = FALSE;
5976
5977 /* Nothing to do if there are no relocations, and no need to do
5978 anything with non-alloc or non-code sections. */
5979 if ((isec->flags & SEC_ALLOC) == 0
5980 || (isec->flags & SEC_CODE) == 0
5981 || (isec->flags & SEC_RELOC) == 0
5982 || isec->reloc_count == 0)
5983 return TRUE;
5984
5985 /* We cannot represent the required PIC relocs in the output, so don't
5986 do anything. The linker doesn't support mixing -shared and -r
5987 anyway. */
5988 if (link_info->relocatable && link_info->shared)
5989 return TRUE;
5990
5991 trampoff = (isec->size + 3) & (bfd_vma) -4;
5992 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
5993 || strcmp (isec->output_section->name, ".fini") == 0);
5994 /* Space for a branch around any trampolines. */
5995 if (maybe_pasted)
5996 trampoff += 4;
5997
5998 symtab_hdr = &elf_symtab_hdr (abfd);
5999
6000 /* Get a copy of the native relocations. */
6001 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6002 link_info->keep_memory);
6003 if (internal_relocs == NULL)
6004 goto error_return;
6005
6006 htab = ppc_elf_hash_table (link_info);
6007 got2 = bfd_get_section_by_name (abfd, ".got2");
6008
6009 irelend = internal_relocs + isec->reloc_count;
6010 for (irel = internal_relocs; irel < irelend; irel++)
6011 {
6012 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6013 bfd_vma toff, roff;
6014 asection *tsec;
6015 struct one_fixup *f;
6016 size_t insn_offset = 0;
6017 bfd_vma max_branch_offset, val;
6018 bfd_byte *hit_addr;
6019 unsigned long t0;
6020 struct elf_link_hash_entry *h;
6021 struct plt_entry **plist;
6022 unsigned char sym_type;
6023
6024 switch (r_type)
6025 {
6026 case R_PPC_REL24:
6027 case R_PPC_LOCAL24PC:
6028 case R_PPC_PLTREL24:
6029 max_branch_offset = 1 << 25;
6030 break;
6031
6032 case R_PPC_REL14:
6033 case R_PPC_REL14_BRTAKEN:
6034 case R_PPC_REL14_BRNTAKEN:
6035 max_branch_offset = 1 << 15;
6036 break;
6037
6038 default:
6039 continue;
6040 }
6041
6042 /* Get the value of the symbol referred to by the reloc. */
6043 h = NULL;
6044 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6045 {
6046 /* A local symbol. */
6047 Elf_Internal_Sym *isym;
6048
6049 /* Read this BFD's local symbols. */
6050 if (isymbuf == NULL)
6051 {
6052 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6053 if (isymbuf == NULL)
6054 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6055 symtab_hdr->sh_info, 0,
6056 NULL, NULL, NULL);
6057 if (isymbuf == 0)
6058 goto error_return;
6059 }
6060 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6061 if (isym->st_shndx == SHN_UNDEF)
6062 tsec = bfd_und_section_ptr;
6063 else if (isym->st_shndx == SHN_ABS)
6064 tsec = bfd_abs_section_ptr;
6065 else if (isym->st_shndx == SHN_COMMON)
6066 tsec = bfd_com_section_ptr;
6067 else
6068 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6069
6070 toff = isym->st_value;
6071 sym_type = ELF_ST_TYPE (isym->st_info);
6072 }
6073 else
6074 {
6075 /* Global symbol handling. */
6076 unsigned long indx;
6077
6078 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6079 h = elf_sym_hashes (abfd)[indx];
6080
6081 while (h->root.type == bfd_link_hash_indirect
6082 || h->root.type == bfd_link_hash_warning)
6083 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6084
6085 if (h->root.type == bfd_link_hash_defined
6086 || h->root.type == bfd_link_hash_defweak)
6087 {
6088 tsec = h->root.u.def.section;
6089 toff = h->root.u.def.value;
6090 }
6091 else if (h->root.type == bfd_link_hash_undefined
6092 || h->root.type == bfd_link_hash_undefweak)
6093 {
6094 tsec = bfd_und_section_ptr;
6095 toff = link_info->relocatable ? indx : 0;
6096 }
6097 else
6098 continue;
6099
6100 sym_type = h->type;
6101 }
6102
6103 /* The condition here under which we call find_plt_ent must
6104 match that in relocate_section. If we call find_plt_ent here
6105 but not in relocate_section, or vice versa, then the branch
6106 destination used here may be incorrect. */
6107 plist = NULL;
6108 if (h != NULL)
6109 {
6110 /* We know is_branch_reloc (r_type) is true. */
6111 if (h->type == STT_GNU_IFUNC
6112 || r_type == R_PPC_PLTREL24)
6113 plist = &h->plt.plist;
6114 }
6115 else if (sym_type == STT_GNU_IFUNC
6116 && elf_local_got_offsets (abfd) != NULL)
6117 {
6118 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6119 struct plt_entry **local_plt = (struct plt_entry **)
6120 (local_got_offsets + symtab_hdr->sh_info);
6121 plist = local_plt + ELF32_R_SYM (irel->r_info);
6122 }
6123 if (plist != NULL)
6124 {
6125 bfd_vma addend = 0;
6126 struct plt_entry *ent;
6127
6128 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6129 addend = irel->r_addend;
6130 ent = find_plt_ent (plist, got2, addend);
6131 if (ent != NULL)
6132 {
6133 if (htab->plt_type == PLT_NEW
6134 || h == NULL
6135 || !htab->elf.dynamic_sections_created
6136 || h->dynindx == -1)
6137 {
6138 tsec = htab->glink;
6139 toff = ent->glink_offset;
6140 }
6141 else
6142 {
6143 tsec = htab->plt;
6144 toff = ent->plt.offset;
6145 }
6146 }
6147 }
6148
6149 /* If the branch and target are in the same section, you have
6150 no hope of adding stubs. We'll error out later should the
6151 branch overflow. */
6152 if (tsec == isec)
6153 continue;
6154
6155 /* There probably isn't any reason to handle symbols in
6156 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6157 attribute for a code section, and we are only looking at
6158 branches. However, implement it correctly here as a
6159 reference for other target relax_section functions. */
6160 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6161 {
6162 /* At this stage in linking, no SEC_MERGE symbol has been
6163 adjusted, so all references to such symbols need to be
6164 passed through _bfd_merged_section_offset. (Later, in
6165 relocate_section, all SEC_MERGE symbols *except* for
6166 section symbols have been adjusted.)
6167
6168 gas may reduce relocations against symbols in SEC_MERGE
6169 sections to a relocation against the section symbol when
6170 the original addend was zero. When the reloc is against
6171 a section symbol we should include the addend in the
6172 offset passed to _bfd_merged_section_offset, since the
6173 location of interest is the original symbol. On the
6174 other hand, an access to "sym+addend" where "sym" is not
6175 a section symbol should not include the addend; Such an
6176 access is presumed to be an offset from "sym"; The
6177 location of interest is just "sym". */
6178 if (sym_type == STT_SECTION)
6179 toff += irel->r_addend;
6180
6181 toff = _bfd_merged_section_offset (abfd, &tsec,
6182 elf_section_data (tsec)->sec_info,
6183 toff);
6184
6185 if (sym_type != STT_SECTION)
6186 toff += irel->r_addend;
6187 }
6188 /* PLTREL24 addends are special. */
6189 else if (r_type != R_PPC_PLTREL24)
6190 toff += irel->r_addend;
6191
6192 /* Attempted -shared link of non-pic code loses. */
6193 if (tsec->output_section == NULL)
6194 continue;
6195
6196 roff = irel->r_offset;
6197
6198 /* If the branch is in range, no need to do anything. */
6199 if (tsec != bfd_und_section_ptr
6200 && (!link_info->relocatable
6201 /* A relocatable link may have sections moved during
6202 final link, so do not presume they remain in range. */
6203 || tsec->output_section == isec->output_section))
6204 {
6205 bfd_vma symaddr, reladdr;
6206
6207 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6208 reladdr = isec->output_section->vma + isec->output_offset + roff;
6209 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6210 continue;
6211 }
6212
6213 /* Look for an existing fixup to this address. */
6214 for (f = fixups; f ; f = f->next)
6215 if (f->tsec == tsec && f->toff == toff)
6216 break;
6217
6218 if (f == NULL)
6219 {
6220 size_t size;
6221 unsigned long stub_rtype;
6222
6223 val = trampoff - roff;
6224 if (val >= max_branch_offset)
6225 /* Oh dear, we can't reach a trampoline. Don't try to add
6226 one. We'll report an error later. */
6227 continue;
6228
6229 if (link_info->shared)
6230 {
6231 size = 4 * ARRAY_SIZE (shared_stub_entry);
6232 insn_offset = 12;
6233 }
6234 else
6235 {
6236 size = 4 * ARRAY_SIZE (stub_entry);
6237 insn_offset = 0;
6238 }
6239 stub_rtype = R_PPC_RELAX;
6240 if (tsec == htab->plt
6241 || tsec == htab->glink)
6242 {
6243 stub_rtype = R_PPC_RELAX_PLT;
6244 if (r_type == R_PPC_PLTREL24)
6245 stub_rtype = R_PPC_RELAX_PLTREL24;
6246 }
6247
6248 /* Hijack the old relocation. Since we need two
6249 relocations for this use a "composite" reloc. */
6250 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6251 stub_rtype);
6252 irel->r_offset = trampoff + insn_offset;
6253 if (r_type == R_PPC_PLTREL24
6254 && stub_rtype != R_PPC_RELAX_PLTREL24)
6255 irel->r_addend = 0;
6256
6257 /* Record the fixup so we don't do it again this section. */
6258 f = bfd_malloc (sizeof (*f));
6259 f->next = fixups;
6260 f->tsec = tsec;
6261 f->toff = toff;
6262 f->trampoff = trampoff;
6263 fixups = f;
6264
6265 trampoff += size;
6266 changes++;
6267 }
6268 else
6269 {
6270 val = f->trampoff - roff;
6271 if (val >= max_branch_offset)
6272 continue;
6273
6274 /* Nop out the reloc, since we're finalizing things here. */
6275 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6276 }
6277
6278 /* Get the section contents. */
6279 if (contents == NULL)
6280 {
6281 /* Get cached copy if it exists. */
6282 if (elf_section_data (isec)->this_hdr.contents != NULL)
6283 contents = elf_section_data (isec)->this_hdr.contents;
6284 else
6285 {
6286 /* Go get them off disk. */
6287 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6288 goto error_return;
6289 }
6290 }
6291
6292 /* Fix up the existing branch to hit the trampoline. */
6293 hit_addr = contents + roff;
6294 switch (r_type)
6295 {
6296 case R_PPC_REL24:
6297 case R_PPC_LOCAL24PC:
6298 case R_PPC_PLTREL24:
6299 t0 = bfd_get_32 (abfd, hit_addr);
6300 t0 &= ~0x3fffffc;
6301 t0 |= val & 0x3fffffc;
6302 bfd_put_32 (abfd, t0, hit_addr);
6303 break;
6304
6305 case R_PPC_REL14:
6306 case R_PPC_REL14_BRTAKEN:
6307 case R_PPC_REL14_BRNTAKEN:
6308 t0 = bfd_get_32 (abfd, hit_addr);
6309 t0 &= ~0xfffc;
6310 t0 |= val & 0xfffc;
6311 bfd_put_32 (abfd, t0, hit_addr);
6312 break;
6313 }
6314 }
6315
6316 /* Write out the trampolines. */
6317 if (fixups != NULL)
6318 {
6319 const int *stub;
6320 bfd_byte *dest;
6321 int i, size;
6322
6323 do
6324 {
6325 struct one_fixup *f = fixups;
6326 fixups = fixups->next;
6327 free (f);
6328 }
6329 while (fixups);
6330
6331 contents = bfd_realloc_or_free (contents, trampoff);
6332 if (contents == NULL)
6333 goto error_return;
6334
6335 isec->size = (isec->size + 3) & (bfd_vma) -4;
6336 dest = contents + isec->size;
6337 /* Branch around the trampolines. */
6338 if (maybe_pasted)
6339 {
6340 bfd_vma val = B + trampoff - isec->size;
6341 bfd_put_32 (abfd, val, dest);
6342 dest += 4;
6343 }
6344 isec->size = trampoff;
6345
6346 if (link_info->shared)
6347 {
6348 stub = shared_stub_entry;
6349 size = ARRAY_SIZE (shared_stub_entry);
6350 }
6351 else
6352 {
6353 stub = stub_entry;
6354 size = ARRAY_SIZE (stub_entry);
6355 }
6356
6357 i = 0;
6358 while (dest < contents + trampoff)
6359 {
6360 bfd_put_32 (abfd, stub[i], dest);
6361 i++;
6362 if (i == size)
6363 i = 0;
6364 dest += 4;
6365 }
6366 BFD_ASSERT (i == 0);
6367 }
6368
6369 if (isymbuf != NULL
6370 && symtab_hdr->contents != (unsigned char *) isymbuf)
6371 {
6372 if (! link_info->keep_memory)
6373 free (isymbuf);
6374 else
6375 {
6376 /* Cache the symbols for elf_link_input_bfd. */
6377 symtab_hdr->contents = (unsigned char *) isymbuf;
6378 }
6379 }
6380
6381 if (contents != NULL
6382 && elf_section_data (isec)->this_hdr.contents != contents)
6383 {
6384 if (!changes && !link_info->keep_memory)
6385 free (contents);
6386 else
6387 {
6388 /* Cache the section contents for elf_link_input_bfd. */
6389 elf_section_data (isec)->this_hdr.contents = contents;
6390 }
6391 }
6392
6393 if (changes != 0)
6394 {
6395 /* Append sufficient NOP relocs so we can write out relocation
6396 information for the trampolines. */
6397 Elf_Internal_Shdr *rel_hdr;
6398 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6399 * sizeof (*new_relocs));
6400 unsigned ix;
6401
6402 if (!new_relocs)
6403 goto error_return;
6404 memcpy (new_relocs, internal_relocs,
6405 isec->reloc_count * sizeof (*new_relocs));
6406 for (ix = changes; ix--;)
6407 {
6408 irel = new_relocs + ix + isec->reloc_count;
6409
6410 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6411 }
6412 if (internal_relocs != elf_section_data (isec)->relocs)
6413 free (internal_relocs);
6414 elf_section_data (isec)->relocs = new_relocs;
6415 isec->reloc_count += changes;
6416 rel_hdr = _bfd_elf_single_rel_hdr (isec);
6417 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6418 }
6419 else if (elf_section_data (isec)->relocs != internal_relocs)
6420 free (internal_relocs);
6421
6422 *again = changes != 0;
6423 if (!*again && link_info->relocatable)
6424 {
6425 /* Convert the internal relax relocs to external form. */
6426 for (irel = internal_relocs; irel < irelend; irel++)
6427 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6428 {
6429 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6430
6431 /* Rewrite the reloc and convert one of the trailing nop
6432 relocs to describe this relocation. */
6433 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6434 /* The relocs are at the bottom 2 bytes */
6435 irel[0].r_offset += 2;
6436 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6437 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6438 irel[1].r_offset += 4;
6439 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6440 irel++;
6441 }
6442 }
6443
6444 return TRUE;
6445
6446 error_return:
6447 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6448 free (isymbuf);
6449 if (contents != NULL
6450 && elf_section_data (isec)->this_hdr.contents != contents)
6451 free (contents);
6452 if (internal_relocs != NULL
6453 && elf_section_data (isec)->relocs != internal_relocs)
6454 free (internal_relocs);
6455 return FALSE;
6456 }
6457 \f
6458 /* What to do when ld finds relocations against symbols defined in
6459 discarded sections. */
6460
6461 static unsigned int
6462 ppc_elf_action_discarded (asection *sec)
6463 {
6464 if (strcmp (".fixup", sec->name) == 0)
6465 return 0;
6466
6467 if (strcmp (".got2", sec->name) == 0)
6468 return 0;
6469
6470 return _bfd_elf_default_action_discarded (sec);
6471 }
6472 \f
6473 /* Fill in the address for a pointer generated in a linker section. */
6474
6475 static bfd_vma
6476 elf_finish_pointer_linker_section (bfd *input_bfd,
6477 elf_linker_section_t *lsect,
6478 struct elf_link_hash_entry *h,
6479 bfd_vma relocation,
6480 const Elf_Internal_Rela *rel)
6481 {
6482 elf_linker_section_pointers_t *linker_section_ptr;
6483
6484 BFD_ASSERT (lsect != NULL);
6485
6486 if (h != NULL)
6487 {
6488 /* Handle global symbol. */
6489 struct ppc_elf_link_hash_entry *eh;
6490
6491 eh = (struct ppc_elf_link_hash_entry *) h;
6492 BFD_ASSERT (eh->elf.def_regular);
6493 linker_section_ptr = eh->linker_section_pointer;
6494 }
6495 else
6496 {
6497 /* Handle local symbol. */
6498 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6499
6500 BFD_ASSERT (is_ppc_elf (input_bfd));
6501 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6502 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6503 }
6504
6505 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6506 rel->r_addend,
6507 lsect);
6508 BFD_ASSERT (linker_section_ptr != NULL);
6509
6510 /* Offset will always be a multiple of four, so use the bottom bit
6511 as a "written" flag. */
6512 if ((linker_section_ptr->offset & 1) == 0)
6513 {
6514 bfd_put_32 (lsect->section->owner,
6515 relocation + linker_section_ptr->addend,
6516 lsect->section->contents + linker_section_ptr->offset);
6517 linker_section_ptr->offset += 1;
6518 }
6519
6520 relocation = (lsect->section->output_section->vma
6521 + lsect->section->output_offset
6522 + linker_section_ptr->offset - 1
6523 - SYM_VAL (lsect->sym));
6524
6525 #ifdef DEBUG
6526 fprintf (stderr,
6527 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6528 lsect->name, (long) relocation, (long) relocation);
6529 #endif
6530
6531 return relocation;
6532 }
6533
6534 #define PPC_LO(v) ((v) & 0xffff)
6535 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6536 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6537
6538 static void
6539 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6540 struct bfd_link_info *info)
6541 {
6542 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6543 bfd *output_bfd = info->output_bfd;
6544 bfd_vma plt;
6545
6546 plt = ((ent->plt.offset & ~1)
6547 + plt_sec->output_section->vma
6548 + plt_sec->output_offset);
6549
6550 if (info->shared)
6551 {
6552 bfd_vma got = 0;
6553
6554 if (ent->addend >= 32768)
6555 got = (ent->addend
6556 + ent->sec->output_section->vma
6557 + ent->sec->output_offset);
6558 else if (htab->elf.hgot != NULL)
6559 got = SYM_VAL (htab->elf.hgot);
6560
6561 plt -= got;
6562
6563 if (plt + 0x8000 < 0x10000)
6564 {
6565 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6566 p += 4;
6567 bfd_put_32 (output_bfd, MTCTR_11, p);
6568 p += 4;
6569 bfd_put_32 (output_bfd, BCTR, p);
6570 p += 4;
6571 bfd_put_32 (output_bfd, NOP, p);
6572 p += 4;
6573 }
6574 else
6575 {
6576 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6577 p += 4;
6578 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6579 p += 4;
6580 bfd_put_32 (output_bfd, MTCTR_11, p);
6581 p += 4;
6582 bfd_put_32 (output_bfd, BCTR, p);
6583 p += 4;
6584 }
6585 }
6586 else
6587 {
6588 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6589 p += 4;
6590 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6591 p += 4;
6592 bfd_put_32 (output_bfd, MTCTR_11, p);
6593 p += 4;
6594 bfd_put_32 (output_bfd, BCTR, p);
6595 p += 4;
6596 }
6597 }
6598
6599 /* Return true if symbol is defined statically. */
6600
6601 static bfd_boolean
6602 is_static_defined (struct elf_link_hash_entry *h)
6603 {
6604 return ((h->root.type == bfd_link_hash_defined
6605 || h->root.type == bfd_link_hash_defweak)
6606 && h->root.u.def.section != NULL
6607 && h->root.u.def.section->output_section != NULL);
6608 }
6609
6610 /* If INSN is an opcode that may be used with an @tls operand, return
6611 the transformed insn for TLS optimisation, otherwise return 0. If
6612 REG is non-zero only match an insn with RB or RA equal to REG. */
6613
6614 unsigned int
6615 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6616 {
6617 unsigned int rtra;
6618
6619 if ((insn & (0x3f << 26)) != 31 << 26)
6620 return 0;
6621
6622 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6623 rtra = insn & ((1 << 26) - (1 << 16));
6624 else if (((insn >> 16) & 0x1f) == reg)
6625 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6626 else
6627 return 0;
6628
6629 if ((insn & (0x3ff << 1)) == 266 << 1)
6630 /* add -> addi. */
6631 insn = 14 << 26;
6632 else if ((insn & (0x1f << 1)) == 23 << 1
6633 && ((insn & (0x1f << 6)) < 14 << 6
6634 || ((insn & (0x1f << 6)) >= 16 << 6
6635 && (insn & (0x1f << 6)) < 24 << 6)))
6636 /* load and store indexed -> dform. */
6637 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6638 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6639 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6640 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6641 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6642 /* lwax -> lwa. */
6643 insn = (58 << 26) | 2;
6644 else
6645 return 0;
6646 insn |= rtra;
6647 return insn;
6648 }
6649
6650 /* If INSN is an opcode that may be used with an @tprel operand, return
6651 the transformed insn for an undefined weak symbol, ie. with the
6652 thread pointer REG operand removed. Otherwise return 0. */
6653
6654 unsigned int
6655 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6656 {
6657 if ((insn & (0x1f << 16)) == reg << 16
6658 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6659 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6660 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6661 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6662 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6663 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6664 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6665 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6666 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6667 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6668 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6669 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6670 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6671 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6672 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6673 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6674 && (insn & 3) != 1)
6675 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6676 && ((insn & 3) == 0 || (insn & 3) == 3))))
6677 {
6678 insn &= ~(0x1f << 16);
6679 }
6680 else if ((insn & (0x1f << 21)) == reg << 21
6681 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6682 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6683 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6684 {
6685 insn &= ~(0x1f << 21);
6686 insn |= (insn & (0x1f << 16)) << 5;
6687 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6688 insn -= 2 >> 26; /* convert to ori,oris */
6689 }
6690 else
6691 insn = 0;
6692 return insn;
6693 }
6694
6695 /* The RELOCATE_SECTION function is called by the ELF backend linker
6696 to handle the relocations for a section.
6697
6698 The relocs are always passed as Rela structures; if the section
6699 actually uses Rel structures, the r_addend field will always be
6700 zero.
6701
6702 This function is responsible for adjust the section contents as
6703 necessary, and (if using Rela relocs and generating a
6704 relocatable output file) adjusting the reloc addend as
6705 necessary.
6706
6707 This function does not have to worry about setting the reloc
6708 address or the reloc symbol index.
6709
6710 LOCAL_SYMS is a pointer to the swapped in local symbols.
6711
6712 LOCAL_SECTIONS is an array giving the section in the input file
6713 corresponding to the st_shndx field of each local symbol.
6714
6715 The global hash table entry for the global symbols can be found
6716 via elf_sym_hashes (input_bfd).
6717
6718 When generating relocatable output, this function must handle
6719 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6720 going to be the section symbol corresponding to the output
6721 section, which means that the addend must be adjusted
6722 accordingly. */
6723
6724 static bfd_boolean
6725 ppc_elf_relocate_section (bfd *output_bfd,
6726 struct bfd_link_info *info,
6727 bfd *input_bfd,
6728 asection *input_section,
6729 bfd_byte *contents,
6730 Elf_Internal_Rela *relocs,
6731 Elf_Internal_Sym *local_syms,
6732 asection **local_sections)
6733 {
6734 Elf_Internal_Shdr *symtab_hdr;
6735 struct elf_link_hash_entry **sym_hashes;
6736 struct ppc_elf_link_hash_table *htab;
6737 Elf_Internal_Rela *rel;
6738 Elf_Internal_Rela *relend;
6739 Elf_Internal_Rela outrel;
6740 asection *got2, *sreloc = NULL;
6741 bfd_vma *local_got_offsets;
6742 bfd_boolean ret = TRUE;
6743 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6744 bfd_boolean is_vxworks_tls;
6745
6746 #ifdef DEBUG
6747 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6748 "%ld relocations%s",
6749 input_bfd, input_section,
6750 (long) input_section->reloc_count,
6751 (info->relocatable) ? " (relocatable)" : "");
6752 #endif
6753
6754 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6755
6756 /* Initialize howto table if not already done. */
6757 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6758 ppc_elf_howto_init ();
6759
6760 htab = ppc_elf_hash_table (info);
6761 local_got_offsets = elf_local_got_offsets (input_bfd);
6762 symtab_hdr = &elf_symtab_hdr (input_bfd);
6763 sym_hashes = elf_sym_hashes (input_bfd);
6764 /* We have to handle relocations in vxworks .tls_vars sections
6765 specially, because the dynamic loader is 'weird'. */
6766 is_vxworks_tls = (htab->is_vxworks && info->shared
6767 && !strcmp (input_section->output_section->name,
6768 ".tls_vars"));
6769 rel = relocs;
6770 relend = relocs + input_section->reloc_count;
6771 for (; rel < relend; rel++)
6772 {
6773 enum elf_ppc_reloc_type r_type;
6774 bfd_vma addend;
6775 bfd_reloc_status_type r;
6776 Elf_Internal_Sym *sym;
6777 asection *sec;
6778 struct elf_link_hash_entry *h;
6779 const char *sym_name;
6780 reloc_howto_type *howto;
6781 unsigned long r_symndx;
6782 bfd_vma relocation;
6783 bfd_vma branch_bit, from;
6784 bfd_boolean unresolved_reloc;
6785 bfd_boolean warned;
6786 unsigned int tls_type, tls_mask, tls_gd;
6787 struct plt_entry **ifunc;
6788
6789 r_type = ELF32_R_TYPE (rel->r_info);
6790 sym = NULL;
6791 sec = NULL;
6792 h = NULL;
6793 unresolved_reloc = FALSE;
6794 warned = FALSE;
6795 r_symndx = ELF32_R_SYM (rel->r_info);
6796
6797 if (r_symndx < symtab_hdr->sh_info)
6798 {
6799 sym = local_syms + r_symndx;
6800 sec = local_sections[r_symndx];
6801 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6802
6803 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6804 }
6805 else
6806 {
6807 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6808 r_symndx, symtab_hdr, sym_hashes,
6809 h, sec, relocation,
6810 unresolved_reloc, warned);
6811
6812 sym_name = h->root.root.string;
6813 }
6814
6815 if (sec != NULL && elf_discarded_section (sec))
6816 {
6817 /* For relocs against symbols from removed linkonce sections,
6818 or sections discarded by a linker script, we just want the
6819 section contents zeroed. Avoid any special processing. */
6820 howto = NULL;
6821 if (r_type < R_PPC_max)
6822 howto = ppc_elf_howto_table[r_type];
6823 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
6824 rel, relend, howto, contents);
6825 }
6826
6827 if (info->relocatable)
6828 {
6829 if (got2 != NULL
6830 && r_type == R_PPC_PLTREL24
6831 && rel->r_addend >= 32768)
6832 {
6833 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6834 addend specifies the GOT pointer offset within .got2. */
6835 rel->r_addend += got2->output_offset;
6836 }
6837 continue;
6838 }
6839
6840 /* TLS optimizations. Replace instruction sequences and relocs
6841 based on information we collected in tls_optimize. We edit
6842 RELOCS so that --emit-relocs will output something sensible
6843 for the final instruction stream. */
6844 tls_mask = 0;
6845 tls_gd = 0;
6846 if (h != NULL)
6847 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6848 else if (local_got_offsets != NULL)
6849 {
6850 struct plt_entry **local_plt;
6851 char *lgot_masks;
6852 local_plt
6853 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6854 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6855 tls_mask = lgot_masks[r_symndx];
6856 }
6857
6858 /* Ensure reloc mapping code below stays sane. */
6859 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6860 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6861 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6862 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6863 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6864 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6865 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6866 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6867 abort ();
6868 switch (r_type)
6869 {
6870 default:
6871 break;
6872
6873 case R_PPC_GOT_TPREL16:
6874 case R_PPC_GOT_TPREL16_LO:
6875 if ((tls_mask & TLS_TLS) != 0
6876 && (tls_mask & TLS_TPREL) == 0)
6877 {
6878 bfd_vma insn;
6879
6880 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6881 insn &= 31 << 21;
6882 insn |= 0x3c020000; /* addis 0,2,0 */
6883 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6884 r_type = R_PPC_TPREL16_HA;
6885 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6886 }
6887 break;
6888
6889 case R_PPC_TLS:
6890 if ((tls_mask & TLS_TLS) != 0
6891 && (tls_mask & TLS_TPREL) == 0)
6892 {
6893 bfd_vma insn;
6894
6895 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6896 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6897 if (insn == 0)
6898 abort ();
6899 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6900 r_type = R_PPC_TPREL16_LO;
6901 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6902
6903 /* Was PPC_TLS which sits on insn boundary, now
6904 PPC_TPREL16_LO which is at low-order half-word. */
6905 rel->r_offset += d_offset;
6906 }
6907 break;
6908
6909 case R_PPC_GOT_TLSGD16_HI:
6910 case R_PPC_GOT_TLSGD16_HA:
6911 tls_gd = TLS_TPRELGD;
6912 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6913 goto tls_gdld_hi;
6914 break;
6915
6916 case R_PPC_GOT_TLSLD16_HI:
6917 case R_PPC_GOT_TLSLD16_HA:
6918 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6919 {
6920 tls_gdld_hi:
6921 if ((tls_mask & tls_gd) != 0)
6922 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6923 + R_PPC_GOT_TPREL16);
6924 else
6925 {
6926 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6927 rel->r_offset -= d_offset;
6928 r_type = R_PPC_NONE;
6929 }
6930 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6931 }
6932 break;
6933
6934 case R_PPC_GOT_TLSGD16:
6935 case R_PPC_GOT_TLSGD16_LO:
6936 tls_gd = TLS_TPRELGD;
6937 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6938 goto tls_ldgd_opt;
6939 break;
6940
6941 case R_PPC_GOT_TLSLD16:
6942 case R_PPC_GOT_TLSLD16_LO:
6943 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6944 {
6945 unsigned int insn1, insn2;
6946 bfd_vma offset;
6947
6948 tls_ldgd_opt:
6949 offset = (bfd_vma) -1;
6950 /* If not using the newer R_PPC_TLSGD/LD to mark
6951 __tls_get_addr calls, we must trust that the call
6952 stays with its arg setup insns, ie. that the next
6953 reloc is the __tls_get_addr call associated with
6954 the current reloc. Edit both insns. */
6955 if (input_section->has_tls_get_addr_call
6956 && rel + 1 < relend
6957 && branch_reloc_hash_match (input_bfd, rel + 1,
6958 htab->tls_get_addr))
6959 offset = rel[1].r_offset;
6960 if ((tls_mask & tls_gd) != 0)
6961 {
6962 /* IE */
6963 insn1 = bfd_get_32 (output_bfd,
6964 contents + rel->r_offset - d_offset);
6965 insn1 &= (1 << 26) - 1;
6966 insn1 |= 32 << 26; /* lwz */
6967 if (offset != (bfd_vma) -1)
6968 {
6969 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6970 insn2 = 0x7c631214; /* add 3,3,2 */
6971 bfd_put_32 (output_bfd, insn2, contents + offset);
6972 }
6973 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6974 + R_PPC_GOT_TPREL16);
6975 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6976 }
6977 else
6978 {
6979 /* LE */
6980 insn1 = 0x3c620000; /* addis 3,2,0 */
6981 if (tls_gd == 0)
6982 {
6983 /* Was an LD reloc. */
6984 for (r_symndx = 0;
6985 r_symndx < symtab_hdr->sh_info;
6986 r_symndx++)
6987 if (local_sections[r_symndx] == sec)
6988 break;
6989 if (r_symndx >= symtab_hdr->sh_info)
6990 r_symndx = STN_UNDEF;
6991 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6992 if (r_symndx != STN_UNDEF)
6993 rel->r_addend -= (local_syms[r_symndx].st_value
6994 + sec->output_offset
6995 + sec->output_section->vma);
6996 }
6997 r_type = R_PPC_TPREL16_HA;
6998 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6999 if (offset != (bfd_vma) -1)
7000 {
7001 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7002 rel[1].r_offset = offset + d_offset;
7003 rel[1].r_addend = rel->r_addend;
7004 insn2 = 0x38630000; /* addi 3,3,0 */
7005 bfd_put_32 (output_bfd, insn2, contents + offset);
7006 }
7007 }
7008 bfd_put_32 (output_bfd, insn1,
7009 contents + rel->r_offset - d_offset);
7010 if (tls_gd == 0)
7011 {
7012 /* We changed the symbol on an LD reloc. Start over
7013 in order to get h, sym, sec etc. right. */
7014 rel--;
7015 continue;
7016 }
7017 }
7018 break;
7019
7020 case R_PPC_TLSGD:
7021 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7022 {
7023 unsigned int insn2;
7024 bfd_vma offset = rel->r_offset;
7025
7026 if ((tls_mask & TLS_TPRELGD) != 0)
7027 {
7028 /* IE */
7029 r_type = R_PPC_NONE;
7030 insn2 = 0x7c631214; /* add 3,3,2 */
7031 }
7032 else
7033 {
7034 /* LE */
7035 r_type = R_PPC_TPREL16_LO;
7036 rel->r_offset += d_offset;
7037 insn2 = 0x38630000; /* addi 3,3,0 */
7038 }
7039 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7040 bfd_put_32 (output_bfd, insn2, contents + offset);
7041 /* Zap the reloc on the _tls_get_addr call too. */
7042 BFD_ASSERT (offset == rel[1].r_offset);
7043 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7044 }
7045 break;
7046
7047 case R_PPC_TLSLD:
7048 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7049 {
7050 unsigned int insn2;
7051
7052 for (r_symndx = 0;
7053 r_symndx < symtab_hdr->sh_info;
7054 r_symndx++)
7055 if (local_sections[r_symndx] == sec)
7056 break;
7057 if (r_symndx >= symtab_hdr->sh_info)
7058 r_symndx = STN_UNDEF;
7059 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7060 if (r_symndx != STN_UNDEF)
7061 rel->r_addend -= (local_syms[r_symndx].st_value
7062 + sec->output_offset
7063 + sec->output_section->vma);
7064
7065 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7066 rel->r_offset += d_offset;
7067 insn2 = 0x38630000; /* addi 3,3,0 */
7068 bfd_put_32 (output_bfd, insn2,
7069 contents + rel->r_offset - d_offset);
7070 /* Zap the reloc on the _tls_get_addr call too. */
7071 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7072 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7073 rel--;
7074 continue;
7075 }
7076 break;
7077 }
7078
7079 /* Handle other relocations that tweak non-addend part of insn. */
7080 branch_bit = 0;
7081 switch (r_type)
7082 {
7083 default:
7084 break;
7085
7086 /* Branch taken prediction relocations. */
7087 case R_PPC_ADDR14_BRTAKEN:
7088 case R_PPC_REL14_BRTAKEN:
7089 branch_bit = BRANCH_PREDICT_BIT;
7090 /* Fall thru */
7091
7092 /* Branch not taken prediction relocations. */
7093 case R_PPC_ADDR14_BRNTAKEN:
7094 case R_PPC_REL14_BRNTAKEN:
7095 {
7096 bfd_vma insn;
7097
7098 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7099 insn &= ~BRANCH_PREDICT_BIT;
7100 insn |= branch_bit;
7101
7102 from = (rel->r_offset
7103 + input_section->output_offset
7104 + input_section->output_section->vma);
7105
7106 /* Invert 'y' bit if not the default. */
7107 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7108 insn ^= BRANCH_PREDICT_BIT;
7109
7110 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7111 break;
7112 }
7113 }
7114
7115 ifunc = NULL;
7116 if (!htab->is_vxworks)
7117 {
7118 struct plt_entry *ent;
7119
7120 if (h != NULL)
7121 {
7122 if (h->type == STT_GNU_IFUNC)
7123 ifunc = &h->plt.plist;
7124 }
7125 else if (local_got_offsets != NULL
7126 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7127 {
7128 struct plt_entry **local_plt;
7129
7130 local_plt = (struct plt_entry **) (local_got_offsets
7131 + symtab_hdr->sh_info);
7132 ifunc = local_plt + r_symndx;
7133 }
7134
7135 ent = NULL;
7136 if (ifunc != NULL
7137 && (!info->shared
7138 || is_branch_reloc (r_type)))
7139 {
7140 addend = 0;
7141 if (r_type == R_PPC_PLTREL24 && info->shared)
7142 addend = rel->r_addend;
7143 ent = find_plt_ent (ifunc, got2, addend);
7144 }
7145 if (ent != NULL)
7146 {
7147 if (h == NULL && (ent->plt.offset & 1) == 0)
7148 {
7149 Elf_Internal_Rela rela;
7150 bfd_byte *loc;
7151
7152 rela.r_offset = (htab->iplt->output_section->vma
7153 + htab->iplt->output_offset
7154 + ent->plt.offset);
7155 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7156 rela.r_addend = relocation;
7157 loc = htab->reliplt->contents;
7158 loc += (htab->reliplt->reloc_count++
7159 * sizeof (Elf32_External_Rela));
7160 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7161
7162 ent->plt.offset |= 1;
7163 }
7164 if (h == NULL && (ent->glink_offset & 1) == 0)
7165 {
7166 unsigned char *p = ((unsigned char *) htab->glink->contents
7167 + ent->glink_offset);
7168 write_glink_stub (ent, htab->iplt, p, info);
7169 ent->glink_offset |= 1;
7170 }
7171
7172 unresolved_reloc = FALSE;
7173 if (htab->plt_type == PLT_NEW
7174 || !htab->elf.dynamic_sections_created
7175 || h == NULL)
7176 relocation = (htab->glink->output_section->vma
7177 + htab->glink->output_offset
7178 + (ent->glink_offset & ~1));
7179 else
7180 relocation = (htab->plt->output_section->vma
7181 + htab->plt->output_offset
7182 + ent->plt.offset);
7183 }
7184 }
7185
7186 addend = rel->r_addend;
7187 tls_type = 0;
7188 howto = NULL;
7189 if (r_type < R_PPC_max)
7190 howto = ppc_elf_howto_table[r_type];
7191 switch (r_type)
7192 {
7193 default:
7194 info->callbacks->einfo
7195 (_("%B: unknown relocation type %d for symbol %s\n"),
7196 input_bfd, (int) r_type, sym_name);
7197
7198 bfd_set_error (bfd_error_bad_value);
7199 ret = FALSE;
7200 continue;
7201
7202 case R_PPC_NONE:
7203 case R_PPC_TLS:
7204 case R_PPC_TLSGD:
7205 case R_PPC_TLSLD:
7206 case R_PPC_EMB_MRKREF:
7207 case R_PPC_GNU_VTINHERIT:
7208 case R_PPC_GNU_VTENTRY:
7209 continue;
7210
7211 /* GOT16 relocations. Like an ADDR16 using the symbol's
7212 address in the GOT as relocation value instead of the
7213 symbol's value itself. Also, create a GOT entry for the
7214 symbol and put the symbol value there. */
7215 case R_PPC_GOT_TLSGD16:
7216 case R_PPC_GOT_TLSGD16_LO:
7217 case R_PPC_GOT_TLSGD16_HI:
7218 case R_PPC_GOT_TLSGD16_HA:
7219 tls_type = TLS_TLS | TLS_GD;
7220 goto dogot;
7221
7222 case R_PPC_GOT_TLSLD16:
7223 case R_PPC_GOT_TLSLD16_LO:
7224 case R_PPC_GOT_TLSLD16_HI:
7225 case R_PPC_GOT_TLSLD16_HA:
7226 tls_type = TLS_TLS | TLS_LD;
7227 goto dogot;
7228
7229 case R_PPC_GOT_TPREL16:
7230 case R_PPC_GOT_TPREL16_LO:
7231 case R_PPC_GOT_TPREL16_HI:
7232 case R_PPC_GOT_TPREL16_HA:
7233 tls_type = TLS_TLS | TLS_TPREL;
7234 goto dogot;
7235
7236 case R_PPC_GOT_DTPREL16:
7237 case R_PPC_GOT_DTPREL16_LO:
7238 case R_PPC_GOT_DTPREL16_HI:
7239 case R_PPC_GOT_DTPREL16_HA:
7240 tls_type = TLS_TLS | TLS_DTPREL;
7241 goto dogot;
7242
7243 case R_PPC_GOT16:
7244 case R_PPC_GOT16_LO:
7245 case R_PPC_GOT16_HI:
7246 case R_PPC_GOT16_HA:
7247 tls_mask = 0;
7248 dogot:
7249 {
7250 /* Relocation is to the entry for this symbol in the global
7251 offset table. */
7252 bfd_vma off;
7253 bfd_vma *offp;
7254 unsigned long indx;
7255
7256 if (htab->got == NULL)
7257 abort ();
7258
7259 indx = 0;
7260 if (tls_type == (TLS_TLS | TLS_LD)
7261 && (h == NULL
7262 || !h->def_dynamic))
7263 offp = &htab->tlsld_got.offset;
7264 else if (h != NULL)
7265 {
7266 bfd_boolean dyn;
7267 dyn = htab->elf.dynamic_sections_created;
7268 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7269 || (info->shared
7270 && SYMBOL_REFERENCES_LOCAL (info, h)))
7271 /* This is actually a static link, or it is a
7272 -Bsymbolic link and the symbol is defined
7273 locally, or the symbol was forced to be local
7274 because of a version file. */
7275 ;
7276 else
7277 {
7278 indx = h->dynindx;
7279 unresolved_reloc = FALSE;
7280 }
7281 offp = &h->got.offset;
7282 }
7283 else
7284 {
7285 if (local_got_offsets == NULL)
7286 abort ();
7287 offp = &local_got_offsets[r_symndx];
7288 }
7289
7290 /* The offset must always be a multiple of 4. We use the
7291 least significant bit to record whether we have already
7292 processed this entry. */
7293 off = *offp;
7294 if ((off & 1) != 0)
7295 off &= ~1;
7296 else
7297 {
7298 unsigned int tls_m = (tls_mask
7299 & (TLS_LD | TLS_GD | TLS_DTPREL
7300 | TLS_TPREL | TLS_TPRELGD));
7301
7302 if (offp == &htab->tlsld_got.offset)
7303 tls_m = TLS_LD;
7304 else if (h == NULL
7305 || !h->def_dynamic)
7306 tls_m &= ~TLS_LD;
7307
7308 /* We might have multiple got entries for this sym.
7309 Initialize them all. */
7310 do
7311 {
7312 int tls_ty = 0;
7313
7314 if ((tls_m & TLS_LD) != 0)
7315 {
7316 tls_ty = TLS_TLS | TLS_LD;
7317 tls_m &= ~TLS_LD;
7318 }
7319 else if ((tls_m & TLS_GD) != 0)
7320 {
7321 tls_ty = TLS_TLS | TLS_GD;
7322 tls_m &= ~TLS_GD;
7323 }
7324 else if ((tls_m & TLS_DTPREL) != 0)
7325 {
7326 tls_ty = TLS_TLS | TLS_DTPREL;
7327 tls_m &= ~TLS_DTPREL;
7328 }
7329 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7330 {
7331 tls_ty = TLS_TLS | TLS_TPREL;
7332 tls_m = 0;
7333 }
7334
7335 /* Generate relocs for the dynamic linker. */
7336 if ((info->shared || indx != 0)
7337 && (offp == &htab->tlsld_got.offset
7338 || h == NULL
7339 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7340 || h->root.type != bfd_link_hash_undefweak))
7341 {
7342 asection *rsec = htab->relgot;
7343 bfd_byte * loc;
7344
7345 outrel.r_offset = (htab->got->output_section->vma
7346 + htab->got->output_offset
7347 + off);
7348 outrel.r_addend = 0;
7349 if (tls_ty & (TLS_LD | TLS_GD))
7350 {
7351 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7352 if (tls_ty == (TLS_TLS | TLS_GD))
7353 {
7354 loc = rsec->contents;
7355 loc += (rsec->reloc_count++
7356 * sizeof (Elf32_External_Rela));
7357 bfd_elf32_swap_reloca_out (output_bfd,
7358 &outrel, loc);
7359 outrel.r_offset += 4;
7360 outrel.r_info
7361 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7362 }
7363 }
7364 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7365 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7366 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7367 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7368 else if (indx != 0)
7369 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7370 else if (ifunc != NULL)
7371 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7372 else
7373 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7374 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7375 {
7376 outrel.r_addend += relocation;
7377 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7378 outrel.r_addend -= htab->elf.tls_sec->vma;
7379 }
7380 loc = rsec->contents;
7381 loc += (rsec->reloc_count++
7382 * sizeof (Elf32_External_Rela));
7383 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7384 }
7385
7386 /* Init the .got section contents if we're not
7387 emitting a reloc. */
7388 else
7389 {
7390 bfd_vma value = relocation;
7391
7392 if (tls_ty == (TLS_TLS | TLS_LD))
7393 value = 1;
7394 else if (tls_ty != 0)
7395 {
7396 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7397 if (tls_ty == (TLS_TLS | TLS_TPREL))
7398 value += DTP_OFFSET - TP_OFFSET;
7399
7400 if (tls_ty == (TLS_TLS | TLS_GD))
7401 {
7402 bfd_put_32 (output_bfd, value,
7403 htab->got->contents + off + 4);
7404 value = 1;
7405 }
7406 }
7407 bfd_put_32 (output_bfd, value,
7408 htab->got->contents + off);
7409 }
7410
7411 off += 4;
7412 if (tls_ty & (TLS_LD | TLS_GD))
7413 off += 4;
7414 }
7415 while (tls_m != 0);
7416
7417 off = *offp;
7418 *offp = off | 1;
7419 }
7420
7421 if (off >= (bfd_vma) -2)
7422 abort ();
7423
7424 if ((tls_type & TLS_TLS) != 0)
7425 {
7426 if (tls_type != (TLS_TLS | TLS_LD))
7427 {
7428 if ((tls_mask & TLS_LD) != 0
7429 && !(h == NULL
7430 || !h->def_dynamic))
7431 off += 8;
7432 if (tls_type != (TLS_TLS | TLS_GD))
7433 {
7434 if ((tls_mask & TLS_GD) != 0)
7435 off += 8;
7436 if (tls_type != (TLS_TLS | TLS_DTPREL))
7437 {
7438 if ((tls_mask & TLS_DTPREL) != 0)
7439 off += 4;
7440 }
7441 }
7442 }
7443 }
7444
7445 relocation = (htab->got->output_section->vma
7446 + htab->got->output_offset
7447 + off
7448 - SYM_VAL (htab->elf.hgot));
7449
7450 /* Addends on got relocations don't make much sense.
7451 x+off@got is actually x@got+off, and since the got is
7452 generated by a hash table traversal, the value in the
7453 got at entry m+n bears little relation to the entry m. */
7454 if (addend != 0)
7455 info->callbacks->einfo
7456 (_("%H: non-zero addend on %s reloc against `%s'\n"),
7457 input_bfd, input_section, rel->r_offset,
7458 howto->name,
7459 sym_name);
7460 }
7461 break;
7462
7463 /* Relocations that need no special processing. */
7464 case R_PPC_LOCAL24PC:
7465 /* It makes no sense to point a local relocation
7466 at a symbol not in this object. */
7467 if (unresolved_reloc)
7468 {
7469 if (! (*info->callbacks->undefined_symbol) (info,
7470 h->root.root.string,
7471 input_bfd,
7472 input_section,
7473 rel->r_offset,
7474 TRUE))
7475 return FALSE;
7476 continue;
7477 }
7478 break;
7479
7480 case R_PPC_DTPREL16:
7481 case R_PPC_DTPREL16_LO:
7482 case R_PPC_DTPREL16_HI:
7483 case R_PPC_DTPREL16_HA:
7484 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7485 break;
7486
7487 /* Relocations that may need to be propagated if this is a shared
7488 object. */
7489 case R_PPC_TPREL16:
7490 case R_PPC_TPREL16_LO:
7491 case R_PPC_TPREL16_HI:
7492 case R_PPC_TPREL16_HA:
7493 if (h != NULL
7494 && h->root.type == bfd_link_hash_undefweak
7495 && h->dynindx == -1)
7496 {
7497 /* Make this relocation against an undefined weak symbol
7498 resolve to zero. This is really just a tweak, since
7499 code using weak externs ought to check that they are
7500 defined before using them. */
7501 bfd_byte *p = contents + rel->r_offset - d_offset;
7502 unsigned int insn = bfd_get_32 (output_bfd, p);
7503 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7504 if (insn != 0)
7505 bfd_put_32 (output_bfd, insn, p);
7506 break;
7507 }
7508 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7509 /* The TPREL16 relocs shouldn't really be used in shared
7510 libs as they will result in DT_TEXTREL being set, but
7511 support them anyway. */
7512 goto dodyn;
7513
7514 case R_PPC_TPREL32:
7515 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7516 goto dodyn;
7517
7518 case R_PPC_DTPREL32:
7519 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7520 goto dodyn;
7521
7522 case R_PPC_DTPMOD32:
7523 relocation = 1;
7524 addend = 0;
7525 goto dodyn;
7526
7527 case R_PPC_REL16:
7528 case R_PPC_REL16_LO:
7529 case R_PPC_REL16_HI:
7530 case R_PPC_REL16_HA:
7531 break;
7532
7533 case R_PPC_REL32:
7534 if (h == NULL || h == htab->elf.hgot)
7535 break;
7536 /* fall through */
7537
7538 case R_PPC_ADDR32:
7539 case R_PPC_ADDR16:
7540 case R_PPC_ADDR16_LO:
7541 case R_PPC_ADDR16_HI:
7542 case R_PPC_ADDR16_HA:
7543 case R_PPC_UADDR32:
7544 case R_PPC_UADDR16:
7545 goto dodyn;
7546
7547 case R_PPC_REL24:
7548 case R_PPC_REL14:
7549 case R_PPC_REL14_BRTAKEN:
7550 case R_PPC_REL14_BRNTAKEN:
7551 /* If these relocations are not to a named symbol, they can be
7552 handled right here, no need to bother the dynamic linker. */
7553 if (SYMBOL_CALLS_LOCAL (info, h)
7554 || h == htab->elf.hgot)
7555 break;
7556 /* fall through */
7557
7558 case R_PPC_ADDR24:
7559 case R_PPC_ADDR14:
7560 case R_PPC_ADDR14_BRTAKEN:
7561 case R_PPC_ADDR14_BRNTAKEN:
7562 if (h != NULL && !info->shared)
7563 break;
7564 /* fall through */
7565
7566 dodyn:
7567 if ((input_section->flags & SEC_ALLOC) == 0
7568 || is_vxworks_tls)
7569 break;
7570
7571 if ((info->shared
7572 && !(h != NULL
7573 && ((h->root.type == bfd_link_hash_undefined
7574 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7575 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7576 || (h->root.type == bfd_link_hash_undefweak
7577 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7578 && (must_be_dyn_reloc (info, r_type)
7579 || !SYMBOL_CALLS_LOCAL (info, h)))
7580 || (ELIMINATE_COPY_RELOCS
7581 && !info->shared
7582 && h != NULL
7583 && h->dynindx != -1
7584 && !h->non_got_ref
7585 && !h->def_regular))
7586 {
7587 int skip;
7588 bfd_byte * loc;
7589 #ifdef DEBUG
7590 fprintf (stderr, "ppc_elf_relocate_section needs to "
7591 "create relocation for %s\n",
7592 (h && h->root.root.string
7593 ? h->root.root.string : "<unknown>"));
7594 #endif
7595
7596 /* When generating a shared object, these relocations
7597 are copied into the output file to be resolved at run
7598 time. */
7599 if (sreloc == NULL)
7600 {
7601 sreloc = elf_section_data (input_section)->sreloc;
7602 if (!htab->elf.dynamic_sections_created)
7603 sreloc = htab->reliplt;
7604 if (sreloc == NULL)
7605 return FALSE;
7606 }
7607
7608 skip = 0;
7609 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
7610 input_section,
7611 rel->r_offset);
7612 if (outrel.r_offset == (bfd_vma) -1
7613 || outrel.r_offset == (bfd_vma) -2)
7614 skip = (int) outrel.r_offset;
7615 outrel.r_offset += (input_section->output_section->vma
7616 + input_section->output_offset);
7617
7618 if (skip)
7619 memset (&outrel, 0, sizeof outrel);
7620 else if ((h != NULL
7621 && (h->root.type == bfd_link_hash_undefined
7622 || h->root.type == bfd_link_hash_undefweak))
7623 || !SYMBOL_REFERENCES_LOCAL (info, h))
7624 {
7625 unresolved_reloc = FALSE;
7626 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7627 outrel.r_addend = rel->r_addend;
7628 }
7629 else
7630 {
7631 outrel.r_addend = relocation + rel->r_addend;
7632
7633 if (r_type != R_PPC_ADDR32)
7634 {
7635 long indx = 0;
7636
7637 if (ifunc != NULL)
7638 {
7639 /* If we get here when building a static
7640 executable, then the libc startup function
7641 responsible for applying indirect function
7642 relocations is going to complain about
7643 the reloc type.
7644 If we get here when building a dynamic
7645 executable, it will be because we have
7646 a text relocation. The dynamic loader
7647 will set the text segment writable and
7648 non-executable to apply text relocations.
7649 So we'll segfault when trying to run the
7650 indirection function to resolve the reloc. */
7651 info->callbacks->einfo
7652 (_("%H: relocation %s for indirect "
7653 "function %s unsupported\n"),
7654 input_bfd, input_section, rel->r_offset,
7655 howto->name,
7656 sym_name);
7657 ret = FALSE;
7658 }
7659 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
7660 ;
7661 else if (sec == NULL || sec->owner == NULL)
7662 {
7663 bfd_set_error (bfd_error_bad_value);
7664 ret = FALSE;
7665 }
7666 else
7667 {
7668 asection *osec;
7669
7670 /* We are turning this relocation into one
7671 against a section symbol. It would be
7672 proper to subtract the symbol's value,
7673 osec->vma, from the emitted reloc addend,
7674 but ld.so expects buggy relocs.
7675 FIXME: Why not always use a zero index? */
7676 osec = sec->output_section;
7677 indx = elf_section_data (osec)->dynindx;
7678 if (indx == 0)
7679 {
7680 osec = htab->elf.text_index_section;
7681 indx = elf_section_data (osec)->dynindx;
7682 }
7683 BFD_ASSERT (indx != 0);
7684 #ifdef DEBUG
7685 if (indx == 0)
7686 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7687 indx, osec->name, osec->flags,
7688 h->root.root.string);
7689 #endif
7690 }
7691
7692 outrel.r_info = ELF32_R_INFO (indx, r_type);
7693 }
7694 else if (ifunc != NULL)
7695 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7696 else
7697 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7698 }
7699
7700 loc = sreloc->contents;
7701 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7702 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7703
7704 if (skip == -1)
7705 continue;
7706
7707 /* This reloc will be computed at runtime. We clear the memory
7708 so that it contains predictable value. */
7709 if (! skip
7710 && ((input_section->flags & SEC_ALLOC) != 0
7711 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7712 {
7713 relocation = howto->pc_relative ? outrel.r_offset : 0;
7714 addend = 0;
7715 break;
7716 }
7717 }
7718 break;
7719
7720 case R_PPC_RELAX_PLT:
7721 case R_PPC_RELAX_PLTREL24:
7722 if (h != NULL)
7723 {
7724 struct plt_entry *ent;
7725 bfd_vma got2_addend = 0;
7726
7727 if (r_type == R_PPC_RELAX_PLTREL24)
7728 {
7729 if (info->shared)
7730 got2_addend = addend;
7731 addend = 0;
7732 }
7733 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7734 if (htab->plt_type == PLT_NEW)
7735 relocation = (htab->glink->output_section->vma
7736 + htab->glink->output_offset
7737 + ent->glink_offset);
7738 else
7739 relocation = (htab->plt->output_section->vma
7740 + htab->plt->output_offset
7741 + ent->plt.offset);
7742 }
7743 /* Fall thru */
7744
7745 case R_PPC_RELAX:
7746 if (info->shared)
7747 relocation -= (input_section->output_section->vma
7748 + input_section->output_offset
7749 + rel->r_offset - 4);
7750
7751 {
7752 unsigned long t0;
7753 unsigned long t1;
7754
7755 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7756 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7757
7758 /* We're clearing the bits for R_PPC_ADDR16_HA
7759 and R_PPC_ADDR16_LO here. */
7760 t0 &= ~0xffff;
7761 t1 &= ~0xffff;
7762
7763 /* t0 is HA, t1 is LO */
7764 relocation += addend;
7765 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7766 t1 |= relocation & 0xffff;
7767
7768 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7769 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7770
7771 /* Rewrite the reloc and convert one of the trailing nop
7772 relocs to describe this relocation. */
7773 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7774 /* The relocs are at the bottom 2 bytes */
7775 rel[0].r_offset += 2;
7776 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7777 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7778 rel[1].r_offset += 4;
7779 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7780 rel++;
7781 }
7782 continue;
7783
7784 /* Indirect .sdata relocation. */
7785 case R_PPC_EMB_SDAI16:
7786 BFD_ASSERT (htab->sdata[0].section != NULL);
7787 if (!is_static_defined (htab->sdata[0].sym))
7788 {
7789 unresolved_reloc = TRUE;
7790 break;
7791 }
7792 relocation
7793 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7794 h, relocation, rel);
7795 addend = 0;
7796 break;
7797
7798 /* Indirect .sdata2 relocation. */
7799 case R_PPC_EMB_SDA2I16:
7800 BFD_ASSERT (htab->sdata[1].section != NULL);
7801 if (!is_static_defined (htab->sdata[1].sym))
7802 {
7803 unresolved_reloc = TRUE;
7804 break;
7805 }
7806 relocation
7807 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7808 h, relocation, rel);
7809 addend = 0;
7810 break;
7811
7812 /* Handle the TOC16 reloc. We want to use the offset within the .got
7813 section, not the actual VMA. This is appropriate when generating
7814 an embedded ELF object, for which the .got section acts like the
7815 AIX .toc section. */
7816 case R_PPC_TOC16: /* phony GOT16 relocations */
7817 if (sec == NULL || sec->output_section == NULL)
7818 {
7819 unresolved_reloc = TRUE;
7820 break;
7821 }
7822 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7823 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7824
7825 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7826 break;
7827
7828 case R_PPC_PLTREL24:
7829 if (h == NULL || ifunc != NULL)
7830 break;
7831 /* Relocation is to the entry for this symbol in the
7832 procedure linkage table. */
7833 {
7834 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7835 info->shared ? addend : 0);
7836 addend = 0;
7837 if (ent == NULL
7838 || htab->plt == NULL)
7839 {
7840 /* We didn't make a PLT entry for this symbol. This
7841 happens when statically linking PIC code, or when
7842 using -Bsymbolic. */
7843 break;
7844 }
7845
7846 unresolved_reloc = FALSE;
7847 if (htab->plt_type == PLT_NEW)
7848 relocation = (htab->glink->output_section->vma
7849 + htab->glink->output_offset
7850 + ent->glink_offset);
7851 else
7852 relocation = (htab->plt->output_section->vma
7853 + htab->plt->output_offset
7854 + ent->plt.offset);
7855 }
7856 break;
7857
7858 /* Relocate against _SDA_BASE_. */
7859 case R_PPC_SDAREL16:
7860 {
7861 const char *name;
7862 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7863
7864 if (sec == NULL
7865 || sec->output_section == NULL
7866 || !is_static_defined (sda))
7867 {
7868 unresolved_reloc = TRUE;
7869 break;
7870 }
7871 addend -= SYM_VAL (sda);
7872
7873 name = bfd_get_section_name (abfd, sec->output_section);
7874 if (! ((CONST_STRNEQ (name, ".sdata")
7875 && (name[6] == 0 || name[6] == '.'))
7876 || (CONST_STRNEQ (name, ".sbss")
7877 && (name[5] == 0 || name[5] == '.'))))
7878 {
7879 info->callbacks->einfo
7880 (_("%B: the target (%s) of a %s relocation is "
7881 "in the wrong output section (%s)\n"),
7882 input_bfd,
7883 sym_name,
7884 howto->name,
7885 name);
7886 }
7887 }
7888 break;
7889
7890 /* Relocate against _SDA2_BASE_. */
7891 case R_PPC_EMB_SDA2REL:
7892 {
7893 const char *name;
7894 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7895
7896 if (sec == NULL
7897 || sec->output_section == NULL
7898 || !is_static_defined (sda))
7899 {
7900 unresolved_reloc = TRUE;
7901 break;
7902 }
7903 addend -= SYM_VAL (sda);
7904
7905 name = bfd_get_section_name (abfd, sec->output_section);
7906 if (! (CONST_STRNEQ (name, ".sdata2")
7907 || CONST_STRNEQ (name, ".sbss2")))
7908 {
7909 info->callbacks->einfo
7910 (_("%B: the target (%s) of a %s relocation is "
7911 "in the wrong output section (%s)\n"),
7912 input_bfd,
7913 sym_name,
7914 howto->name,
7915 name);
7916 }
7917 }
7918 break;
7919
7920 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7921 case R_PPC_EMB_SDA21:
7922 case R_PPC_EMB_RELSDA:
7923 {
7924 const char *name;
7925 int reg;
7926 struct elf_link_hash_entry *sda = NULL;
7927
7928 if (sec == NULL || sec->output_section == NULL)
7929 {
7930 unresolved_reloc = TRUE;
7931 break;
7932 }
7933
7934 name = bfd_get_section_name (abfd, sec->output_section);
7935 if (((CONST_STRNEQ (name, ".sdata")
7936 && (name[6] == 0 || name[6] == '.'))
7937 || (CONST_STRNEQ (name, ".sbss")
7938 && (name[5] == 0 || name[5] == '.'))))
7939 {
7940 reg = 13;
7941 sda = htab->sdata[0].sym;
7942 }
7943 else if (CONST_STRNEQ (name, ".sdata2")
7944 || CONST_STRNEQ (name, ".sbss2"))
7945 {
7946 reg = 2;
7947 sda = htab->sdata[1].sym;
7948 }
7949 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7950 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7951 {
7952 reg = 0;
7953 }
7954 else
7955 {
7956 info->callbacks->einfo
7957 (_("%B: the target (%s) of a %s relocation is "
7958 "in the wrong output section (%s)\n"),
7959 input_bfd,
7960 sym_name,
7961 howto->name,
7962 name);
7963
7964 bfd_set_error (bfd_error_bad_value);
7965 ret = FALSE;
7966 continue;
7967 }
7968
7969 if (sda != NULL)
7970 {
7971 if (!is_static_defined (sda))
7972 {
7973 unresolved_reloc = TRUE;
7974 break;
7975 }
7976 addend -= SYM_VAL (sda);
7977 }
7978
7979 if (r_type == R_PPC_EMB_SDA21)
7980 {
7981 bfd_vma insn; /* Fill in register field. */
7982
7983 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7984 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7985 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7986 }
7987 }
7988 break;
7989
7990 /* Relocate against the beginning of the section. */
7991 case R_PPC_SECTOFF:
7992 case R_PPC_SECTOFF_LO:
7993 case R_PPC_SECTOFF_HI:
7994 case R_PPC_SECTOFF_HA:
7995 if (sec == NULL || sec->output_section == NULL)
7996 {
7997 unresolved_reloc = TRUE;
7998 break;
7999 }
8000 addend -= sec->output_section->vma;
8001 break;
8002
8003 /* Negative relocations. */
8004 case R_PPC_EMB_NADDR32:
8005 case R_PPC_EMB_NADDR16:
8006 case R_PPC_EMB_NADDR16_LO:
8007 case R_PPC_EMB_NADDR16_HI:
8008 case R_PPC_EMB_NADDR16_HA:
8009 addend -= 2 * relocation;
8010 break;
8011
8012 case R_PPC_COPY:
8013 case R_PPC_GLOB_DAT:
8014 case R_PPC_JMP_SLOT:
8015 case R_PPC_RELATIVE:
8016 case R_PPC_IRELATIVE:
8017 case R_PPC_PLT32:
8018 case R_PPC_PLTREL32:
8019 case R_PPC_PLT16_LO:
8020 case R_PPC_PLT16_HI:
8021 case R_PPC_PLT16_HA:
8022 case R_PPC_ADDR30:
8023 case R_PPC_EMB_RELSEC16:
8024 case R_PPC_EMB_RELST_LO:
8025 case R_PPC_EMB_RELST_HI:
8026 case R_PPC_EMB_RELST_HA:
8027 case R_PPC_EMB_BIT_FLD:
8028 info->callbacks->einfo
8029 (_("%B: relocation %s is not yet supported for symbol %s\n"),
8030 input_bfd,
8031 howto->name,
8032 sym_name);
8033
8034 bfd_set_error (bfd_error_invalid_operation);
8035 ret = FALSE;
8036 continue;
8037 }
8038
8039 /* Do any further special processing. */
8040 switch (r_type)
8041 {
8042 default:
8043 break;
8044
8045 case R_PPC_ADDR16_HA:
8046 case R_PPC_REL16_HA:
8047 case R_PPC_SECTOFF_HA:
8048 case R_PPC_TPREL16_HA:
8049 case R_PPC_DTPREL16_HA:
8050 case R_PPC_EMB_NADDR16_HA:
8051 case R_PPC_EMB_RELST_HA:
8052 /* It's just possible that this symbol is a weak symbol
8053 that's not actually defined anywhere. In that case,
8054 'sec' would be NULL, and we should leave the symbol
8055 alone (it will be set to zero elsewhere in the link). */
8056 if (sec == NULL)
8057 break;
8058 /* Fall thru */
8059
8060 case R_PPC_PLT16_HA:
8061 case R_PPC_GOT16_HA:
8062 case R_PPC_GOT_TLSGD16_HA:
8063 case R_PPC_GOT_TLSLD16_HA:
8064 case R_PPC_GOT_TPREL16_HA:
8065 case R_PPC_GOT_DTPREL16_HA:
8066 /* Add 0x10000 if sign bit in 0:15 is set.
8067 Bits 0:15 are not used. */
8068 addend += 0x8000;
8069 break;
8070 }
8071
8072 #ifdef DEBUG
8073 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8074 "offset = %ld, addend = %ld\n",
8075 howto->name,
8076 (int) r_type,
8077 sym_name,
8078 r_symndx,
8079 (long) rel->r_offset,
8080 (long) addend);
8081 #endif
8082
8083 if (unresolved_reloc
8084 && !((input_section->flags & SEC_DEBUGGING) != 0
8085 && h->def_dynamic))
8086 {
8087 info->callbacks->einfo
8088 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
8089 input_bfd, input_section, rel->r_offset,
8090 howto->name,
8091 sym_name);
8092 ret = FALSE;
8093 }
8094
8095 r = _bfd_final_link_relocate (howto,
8096 input_bfd,
8097 input_section,
8098 contents,
8099 rel->r_offset,
8100 relocation,
8101 addend);
8102
8103 if (r != bfd_reloc_ok)
8104 {
8105 if (r == bfd_reloc_overflow)
8106 {
8107 if (warned)
8108 continue;
8109 if (h != NULL
8110 && h->root.type == bfd_link_hash_undefweak
8111 && howto->pc_relative)
8112 {
8113 /* Assume this is a call protected by other code that
8114 detect the symbol is undefined. If this is the case,
8115 we can safely ignore the overflow. If not, the
8116 program is hosed anyway, and a little warning isn't
8117 going to help. */
8118
8119 continue;
8120 }
8121
8122 if (! (*info->callbacks->reloc_overflow) (info,
8123 (h ? &h->root : NULL),
8124 sym_name,
8125 howto->name,
8126 rel->r_addend,
8127 input_bfd,
8128 input_section,
8129 rel->r_offset))
8130 return FALSE;
8131 }
8132 else
8133 {
8134 info->callbacks->einfo
8135 (_("%H: %s reloc against `%s': error %d\n"),
8136 input_bfd, input_section, rel->r_offset,
8137 howto->name, sym_name, (int) r);
8138 ret = FALSE;
8139 }
8140 }
8141 }
8142
8143 #ifdef DEBUG
8144 fprintf (stderr, "\n");
8145 #endif
8146
8147 return ret;
8148 }
8149 \f
8150 /* Finish up dynamic symbol handling. We set the contents of various
8151 dynamic sections here. */
8152
8153 static bfd_boolean
8154 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8155 struct bfd_link_info *info,
8156 struct elf_link_hash_entry *h,
8157 Elf_Internal_Sym *sym)
8158 {
8159 struct ppc_elf_link_hash_table *htab;
8160 struct plt_entry *ent;
8161 bfd_boolean doneone;
8162
8163 #ifdef DEBUG
8164 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8165 h->root.root.string);
8166 #endif
8167
8168 htab = ppc_elf_hash_table (info);
8169 BFD_ASSERT (htab->elf.dynobj != NULL);
8170
8171 doneone = FALSE;
8172 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8173 if (ent->plt.offset != (bfd_vma) -1)
8174 {
8175 if (!doneone)
8176 {
8177 Elf_Internal_Rela rela;
8178 bfd_byte *loc;
8179 bfd_vma reloc_index;
8180
8181 if (htab->plt_type == PLT_NEW
8182 || !htab->elf.dynamic_sections_created
8183 || h->dynindx == -1)
8184 reloc_index = ent->plt.offset / 4;
8185 else
8186 {
8187 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8188 / htab->plt_slot_size);
8189 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8190 && htab->plt_type == PLT_OLD)
8191 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8192 }
8193
8194 /* This symbol has an entry in the procedure linkage table.
8195 Set it up. */
8196 if (htab->plt_type == PLT_VXWORKS
8197 && htab->elf.dynamic_sections_created
8198 && h->dynindx != -1)
8199 {
8200 bfd_vma got_offset;
8201 const bfd_vma *plt_entry;
8202
8203 /* The first three entries in .got.plt are reserved. */
8204 got_offset = (reloc_index + 3) * 4;
8205
8206 /* Use the right PLT. */
8207 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8208 : ppc_elf_vxworks_plt_entry;
8209
8210 /* Fill in the .plt on VxWorks. */
8211 if (info->shared)
8212 {
8213 bfd_put_32 (output_bfd,
8214 plt_entry[0] | PPC_HA (got_offset),
8215 htab->plt->contents + ent->plt.offset + 0);
8216 bfd_put_32 (output_bfd,
8217 plt_entry[1] | PPC_LO (got_offset),
8218 htab->plt->contents + ent->plt.offset + 4);
8219 }
8220 else
8221 {
8222 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8223
8224 bfd_put_32 (output_bfd,
8225 plt_entry[0] | PPC_HA (got_loc),
8226 htab->plt->contents + ent->plt.offset + 0);
8227 bfd_put_32 (output_bfd,
8228 plt_entry[1] | PPC_LO (got_loc),
8229 htab->plt->contents + ent->plt.offset + 4);
8230 }
8231
8232 bfd_put_32 (output_bfd, plt_entry[2],
8233 htab->plt->contents + ent->plt.offset + 8);
8234 bfd_put_32 (output_bfd, plt_entry[3],
8235 htab->plt->contents + ent->plt.offset + 12);
8236
8237 /* This instruction is an immediate load. The value loaded is
8238 the byte offset of the R_PPC_JMP_SLOT relocation from the
8239 start of the .rela.plt section. The value is stored in the
8240 low-order 16 bits of the load instruction. */
8241 /* NOTE: It appears that this is now an index rather than a
8242 prescaled offset. */
8243 bfd_put_32 (output_bfd,
8244 plt_entry[4] | reloc_index,
8245 htab->plt->contents + ent->plt.offset + 16);
8246 /* This instruction is a PC-relative branch whose target is
8247 the start of the PLT section. The address of this branch
8248 instruction is 20 bytes beyond the start of this PLT entry.
8249 The address is encoded in bits 6-29, inclusive. The value
8250 stored is right-shifted by two bits, permitting a 26-bit
8251 offset. */
8252 bfd_put_32 (output_bfd,
8253 (plt_entry[5]
8254 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8255 htab->plt->contents + ent->plt.offset + 20);
8256 bfd_put_32 (output_bfd, plt_entry[6],
8257 htab->plt->contents + ent->plt.offset + 24);
8258 bfd_put_32 (output_bfd, plt_entry[7],
8259 htab->plt->contents + ent->plt.offset + 28);
8260
8261 /* Fill in the GOT entry corresponding to this PLT slot with
8262 the address immediately after the the "bctr" instruction
8263 in this PLT entry. */
8264 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8265 + htab->plt->output_offset
8266 + ent->plt.offset + 16),
8267 htab->sgotplt->contents + got_offset);
8268
8269 if (!info->shared)
8270 {
8271 /* Fill in a couple of entries in .rela.plt.unloaded. */
8272 loc = htab->srelplt2->contents
8273 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8274 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8275 * sizeof (Elf32_External_Rela));
8276
8277 /* Provide the @ha relocation for the first instruction. */
8278 rela.r_offset = (htab->plt->output_section->vma
8279 + htab->plt->output_offset
8280 + ent->plt.offset + 2);
8281 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8282 R_PPC_ADDR16_HA);
8283 rela.r_addend = got_offset;
8284 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8285 loc += sizeof (Elf32_External_Rela);
8286
8287 /* Provide the @l relocation for the second instruction. */
8288 rela.r_offset = (htab->plt->output_section->vma
8289 + htab->plt->output_offset
8290 + ent->plt.offset + 6);
8291 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8292 R_PPC_ADDR16_LO);
8293 rela.r_addend = got_offset;
8294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8295 loc += sizeof (Elf32_External_Rela);
8296
8297 /* Provide a relocation for the GOT entry corresponding to this
8298 PLT slot. Point it at the middle of the .plt entry. */
8299 rela.r_offset = (htab->sgotplt->output_section->vma
8300 + htab->sgotplt->output_offset
8301 + got_offset);
8302 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8303 R_PPC_ADDR32);
8304 rela.r_addend = ent->plt.offset + 16;
8305 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8306 }
8307
8308 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8309 In particular, the offset for the relocation is not the
8310 address of the PLT entry for this function, as specified
8311 by the ABI. Instead, the offset is set to the address of
8312 the GOT slot for this function. See EABI 4.4.4.1. */
8313 rela.r_offset = (htab->sgotplt->output_section->vma
8314 + htab->sgotplt->output_offset
8315 + got_offset);
8316
8317 }
8318 else
8319 {
8320 asection *splt = htab->plt;
8321 if (!htab->elf.dynamic_sections_created
8322 || h->dynindx == -1)
8323 splt = htab->iplt;
8324
8325 rela.r_offset = (splt->output_section->vma
8326 + splt->output_offset
8327 + ent->plt.offset);
8328 if (htab->plt_type == PLT_OLD
8329 || !htab->elf.dynamic_sections_created
8330 || h->dynindx == -1)
8331 {
8332 /* We don't need to fill in the .plt. The ppc dynamic
8333 linker will fill it in. */
8334 }
8335 else
8336 {
8337 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8338 + htab->glink->output_section->vma
8339 + htab->glink->output_offset);
8340 bfd_put_32 (output_bfd, val,
8341 splt->contents + ent->plt.offset);
8342 }
8343 }
8344
8345 /* Fill in the entry in the .rela.plt section. */
8346 rela.r_addend = 0;
8347 if (!htab->elf.dynamic_sections_created
8348 || h->dynindx == -1)
8349 {
8350 BFD_ASSERT (h->type == STT_GNU_IFUNC
8351 && h->def_regular
8352 && (h->root.type == bfd_link_hash_defined
8353 || h->root.type == bfd_link_hash_defweak));
8354 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8355 rela.r_addend = SYM_VAL (h);
8356 }
8357 else
8358 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8359
8360 if (!htab->elf.dynamic_sections_created
8361 || h->dynindx == -1)
8362 loc = (htab->reliplt->contents
8363 + (htab->reliplt->reloc_count++
8364 * sizeof (Elf32_External_Rela)));
8365 else
8366 loc = (htab->relplt->contents
8367 + reloc_index * sizeof (Elf32_External_Rela));
8368 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8369
8370 if (!h->def_regular)
8371 {
8372 /* Mark the symbol as undefined, rather than as
8373 defined in the .plt section. Leave the value if
8374 there were any relocations where pointer equality
8375 matters (this is a clue for the dynamic linker, to
8376 make function pointer comparisons work between an
8377 application and shared library), otherwise set it
8378 to zero. */
8379 sym->st_shndx = SHN_UNDEF;
8380 if (!h->pointer_equality_needed)
8381 sym->st_value = 0;
8382 else if (!h->ref_regular_nonweak)
8383 {
8384 /* This breaks function pointer comparisons, but
8385 that is better than breaking tests for a NULL
8386 function pointer. */
8387 sym->st_value = 0;
8388 }
8389 }
8390 else if (h->type == STT_GNU_IFUNC
8391 && !info->shared)
8392 {
8393 /* Set the value of ifunc symbols in a non-pie
8394 executable to the glink entry. This is to avoid
8395 text relocations. We can't do this for ifunc in
8396 allocate_dynrelocs, as we do for normal dynamic
8397 function symbols with plt entries, because we need
8398 to keep the original value around for the ifunc
8399 relocation. */
8400 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8401 (output_bfd, htab->glink->output_section));
8402 sym->st_value = (ent->glink_offset
8403 + htab->glink->output_offset
8404 + htab->glink->output_section->vma);
8405 }
8406 doneone = TRUE;
8407 }
8408
8409 if (htab->plt_type == PLT_NEW
8410 || !htab->elf.dynamic_sections_created
8411 || h->dynindx == -1)
8412 {
8413 unsigned char *p;
8414 asection *splt = htab->plt;
8415 if (!htab->elf.dynamic_sections_created
8416 || h->dynindx == -1)
8417 splt = htab->iplt;
8418
8419 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8420
8421 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8422 {
8423 bfd_put_32 (output_bfd, LWZ_11_3, p);
8424 p += 4;
8425 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8426 p += 4;
8427 bfd_put_32 (output_bfd, MR_0_3, p);
8428 p += 4;
8429 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8430 p += 4;
8431 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8432 p += 4;
8433 bfd_put_32 (output_bfd, BEQLR, p);
8434 p += 4;
8435 bfd_put_32 (output_bfd, MR_3_0, p);
8436 p += 4;
8437 bfd_put_32 (output_bfd, NOP, p);
8438 p += 4;
8439 }
8440
8441 write_glink_stub (ent, splt, p, info);
8442
8443 if (!info->shared)
8444 /* We only need one non-PIC glink stub. */
8445 break;
8446 }
8447 else
8448 break;
8449 }
8450
8451 if (h->needs_copy)
8452 {
8453 asection *s;
8454 Elf_Internal_Rela rela;
8455 bfd_byte *loc;
8456
8457 /* This symbols needs a copy reloc. Set it up. */
8458
8459 #ifdef DEBUG
8460 fprintf (stderr, ", copy");
8461 #endif
8462
8463 BFD_ASSERT (h->dynindx != -1);
8464
8465 if (ppc_elf_hash_entry (h)->has_sda_refs)
8466 s = htab->relsbss;
8467 else
8468 s = htab->relbss;
8469 BFD_ASSERT (s != NULL);
8470
8471 rela.r_offset = SYM_VAL (h);
8472 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8473 rela.r_addend = 0;
8474 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8475 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8476 }
8477
8478 #ifdef DEBUG
8479 fprintf (stderr, "\n");
8480 #endif
8481
8482 /* Mark some specially defined symbols as absolute. */
8483 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8484 || (!htab->is_vxworks
8485 && (h == htab->elf.hgot
8486 || strcmp (h->root.root.string,
8487 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8488 sym->st_shndx = SHN_ABS;
8489
8490 return TRUE;
8491 }
8492 \f
8493 static enum elf_reloc_type_class
8494 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8495 {
8496 switch (ELF32_R_TYPE (rela->r_info))
8497 {
8498 case R_PPC_RELATIVE:
8499 return reloc_class_relative;
8500 case R_PPC_REL24:
8501 case R_PPC_ADDR24:
8502 case R_PPC_JMP_SLOT:
8503 return reloc_class_plt;
8504 case R_PPC_COPY:
8505 return reloc_class_copy;
8506 default:
8507 return reloc_class_normal;
8508 }
8509 }
8510 \f
8511 /* Finish up the dynamic sections. */
8512
8513 static bfd_boolean
8514 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8515 struct bfd_link_info *info)
8516 {
8517 asection *sdyn;
8518 asection *splt;
8519 struct ppc_elf_link_hash_table *htab;
8520 bfd_vma got;
8521 bfd *dynobj;
8522 bfd_boolean ret = TRUE;
8523
8524 #ifdef DEBUG
8525 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8526 #endif
8527
8528 htab = ppc_elf_hash_table (info);
8529 dynobj = elf_hash_table (info)->dynobj;
8530 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8531 if (htab->is_vxworks)
8532 splt = bfd_get_section_by_name (dynobj, ".plt");
8533 else
8534 splt = NULL;
8535
8536 got = 0;
8537 if (htab->elf.hgot != NULL)
8538 got = SYM_VAL (htab->elf.hgot);
8539
8540 if (htab->elf.dynamic_sections_created)
8541 {
8542 Elf32_External_Dyn *dyncon, *dynconend;
8543
8544 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8545
8546 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8547 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8548 for (; dyncon < dynconend; dyncon++)
8549 {
8550 Elf_Internal_Dyn dyn;
8551 asection *s;
8552
8553 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8554
8555 switch (dyn.d_tag)
8556 {
8557 case DT_PLTGOT:
8558 if (htab->is_vxworks)
8559 s = htab->sgotplt;
8560 else
8561 s = htab->plt;
8562 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8563 break;
8564
8565 case DT_PLTRELSZ:
8566 dyn.d_un.d_val = htab->relplt->size;
8567 break;
8568
8569 case DT_JMPREL:
8570 s = htab->relplt;
8571 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8572 break;
8573
8574 case DT_PPC_GOT:
8575 dyn.d_un.d_ptr = got;
8576 break;
8577
8578 case DT_RELASZ:
8579 if (htab->is_vxworks)
8580 {
8581 if (htab->relplt)
8582 dyn.d_un.d_ptr -= htab->relplt->size;
8583 break;
8584 }
8585 continue;
8586
8587 default:
8588 if (htab->is_vxworks
8589 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8590 break;
8591 continue;
8592 }
8593
8594 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8595 }
8596 }
8597
8598 if (htab->got != NULL)
8599 {
8600 if (htab->elf.hgot->root.u.def.section == htab->got
8601 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8602 {
8603 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8604
8605 p += htab->elf.hgot->root.u.def.value;
8606 if (htab->plt_type == PLT_OLD)
8607 {
8608 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8609 so that a function can easily find the address of
8610 _GLOBAL_OFFSET_TABLE_. */
8611 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8612 < htab->elf.hgot->root.u.def.section->size);
8613 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8614 }
8615
8616 if (sdyn != NULL)
8617 {
8618 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8619 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8620 < htab->elf.hgot->root.u.def.section->size);
8621 bfd_put_32 (output_bfd, val, p);
8622 }
8623 }
8624 else
8625 {
8626 info->callbacks->einfo (_("%s not defined in linker created %s\n"),
8627 htab->elf.hgot->root.root.string,
8628 (htab->sgotplt != NULL
8629 ? htab->sgotplt->name : htab->got->name));
8630 bfd_set_error (bfd_error_bad_value);
8631 ret = FALSE;
8632 }
8633
8634 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8635 }
8636
8637 /* Fill in the first entry in the VxWorks procedure linkage table. */
8638 if (splt && splt->size > 0)
8639 {
8640 /* Use the right PLT. */
8641 const bfd_vma *plt_entry = (info->shared
8642 ? ppc_elf_vxworks_pic_plt0_entry
8643 : ppc_elf_vxworks_plt0_entry);
8644
8645 if (!info->shared)
8646 {
8647 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8648
8649 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8650 splt->contents + 0);
8651 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8652 splt->contents + 4);
8653 }
8654 else
8655 {
8656 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8657 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8658 }
8659 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8660 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8661 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8662 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8663 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8664 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8665
8666 if (! info->shared)
8667 {
8668 Elf_Internal_Rela rela;
8669 bfd_byte *loc;
8670
8671 loc = htab->srelplt2->contents;
8672
8673 /* Output the @ha relocation for the first instruction. */
8674 rela.r_offset = (htab->plt->output_section->vma
8675 + htab->plt->output_offset
8676 + 2);
8677 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8678 rela.r_addend = 0;
8679 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8680 loc += sizeof (Elf32_External_Rela);
8681
8682 /* Output the @l relocation for the second instruction. */
8683 rela.r_offset = (htab->plt->output_section->vma
8684 + htab->plt->output_offset
8685 + 6);
8686 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8687 rela.r_addend = 0;
8688 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8689 loc += sizeof (Elf32_External_Rela);
8690
8691 /* Fix up the remaining relocations. They may have the wrong
8692 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8693 in which symbols were output. */
8694 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8695 {
8696 Elf_Internal_Rela rel;
8697
8698 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8699 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8700 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8701 loc += sizeof (Elf32_External_Rela);
8702
8703 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8704 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8705 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8706 loc += sizeof (Elf32_External_Rela);
8707
8708 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8709 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8710 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8711 loc += sizeof (Elf32_External_Rela);
8712 }
8713 }
8714 }
8715
8716 if (htab->glink != NULL
8717 && htab->glink->contents != NULL
8718 && htab->elf.dynamic_sections_created)
8719 {
8720 unsigned char *p;
8721 unsigned char *endp;
8722 bfd_vma res0;
8723 unsigned int i;
8724
8725 /*
8726 * PIC glink code is the following:
8727 *
8728 * # ith PLT code stub.
8729 * addis 11,30,(plt+(i-1)*4-got)@ha
8730 * lwz 11,(plt+(i-1)*4-got)@l(11)
8731 * mtctr 11
8732 * bctr
8733 *
8734 * # A table of branches, one for each plt entry.
8735 * # The idea is that the plt call stub loads ctr and r11 with these
8736 * # addresses, so (r11 - res_0) gives the plt index * 4.
8737 * res_0: b PLTresolve
8738 * res_1: b PLTresolve
8739 * .
8740 * # Some number of entries towards the end can be nops
8741 * res_n_m3: nop
8742 * res_n_m2: nop
8743 * res_n_m1:
8744 *
8745 * PLTresolve:
8746 * addis 11,11,(1f-res_0)@ha
8747 * mflr 0
8748 * bcl 20,31,1f
8749 * 1: addi 11,11,(1b-res_0)@l
8750 * mflr 12
8751 * mtlr 0
8752 * sub 11,11,12 # r11 = index * 4
8753 * addis 12,12,(got+4-1b)@ha
8754 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8755 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8756 * mtctr 0
8757 * add 0,11,11
8758 * add 11,0,11 # r11 = index * 12 = reloc offset.
8759 * bctr
8760 */
8761 static const unsigned int pic_plt_resolve[] =
8762 {
8763 ADDIS_11_11,
8764 MFLR_0,
8765 BCL_20_31,
8766 ADDI_11_11,
8767 MFLR_12,
8768 MTLR_0,
8769 SUB_11_11_12,
8770 ADDIS_12_12,
8771 LWZ_0_12,
8772 LWZ_12_12,
8773 MTCTR_0,
8774 ADD_0_11_11,
8775 ADD_11_0_11,
8776 BCTR,
8777 NOP,
8778 NOP
8779 };
8780
8781 /*
8782 * Non-PIC glink code is a little simpler.
8783 *
8784 * # ith PLT code stub.
8785 * lis 11,(plt+(i-1)*4)@ha
8786 * lwz 11,(plt+(i-1)*4)@l(11)
8787 * mtctr 11
8788 * bctr
8789 *
8790 * The branch table is the same, then comes
8791 *
8792 * PLTresolve:
8793 * lis 12,(got+4)@ha
8794 * addis 11,11,(-res_0)@ha
8795 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8796 * addi 11,11,(-res_0)@l # r11 = index * 4
8797 * mtctr 0
8798 * add 0,11,11
8799 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8800 * add 11,0,11 # r11 = index * 12 = reloc offset.
8801 * bctr
8802 */
8803 static const unsigned int plt_resolve[] =
8804 {
8805 LIS_12,
8806 ADDIS_11_11,
8807 LWZ_0_12,
8808 ADDI_11_11,
8809 MTCTR_0,
8810 ADD_0_11_11,
8811 LWZ_12_12,
8812 ADD_11_0_11,
8813 BCTR,
8814 NOP,
8815 NOP,
8816 NOP,
8817 NOP,
8818 NOP,
8819 NOP,
8820 NOP
8821 };
8822
8823 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8824 abort ();
8825 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8826 abort ();
8827
8828 /* Build the branch table, one for each plt entry (less one),
8829 and perhaps some padding. */
8830 p = htab->glink->contents;
8831 p += htab->glink_pltresolve;
8832 endp = htab->glink->contents;
8833 endp += htab->glink->size - GLINK_PLTRESOLVE;
8834 while (p < endp - 8 * 4)
8835 {
8836 bfd_put_32 (output_bfd, B + endp - p, p);
8837 p += 4;
8838 }
8839 while (p < endp)
8840 {
8841 bfd_put_32 (output_bfd, NOP, p);
8842 p += 4;
8843 }
8844
8845 res0 = (htab->glink_pltresolve
8846 + htab->glink->output_section->vma
8847 + htab->glink->output_offset);
8848
8849 /* Last comes the PLTresolve stub. */
8850 if (info->shared)
8851 {
8852 bfd_vma bcl;
8853
8854 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8855 {
8856 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8857 p += 4;
8858 }
8859 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8860
8861 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8862 + htab->glink->output_section->vma
8863 + htab->glink->output_offset);
8864
8865 bfd_put_32 (output_bfd,
8866 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8867 bfd_put_32 (output_bfd,
8868 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8869 bfd_put_32 (output_bfd,
8870 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8871 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8872 {
8873 bfd_put_32 (output_bfd,
8874 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8875 bfd_put_32 (output_bfd,
8876 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8877 }
8878 else
8879 {
8880 bfd_put_32 (output_bfd,
8881 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8882 bfd_put_32 (output_bfd,
8883 LWZ_12_12 + 4, p + 9*4);
8884 }
8885 }
8886 else
8887 {
8888 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8889 {
8890 bfd_put_32 (output_bfd, plt_resolve[i], p);
8891 p += 4;
8892 }
8893 p -= 4 * ARRAY_SIZE (plt_resolve);
8894
8895 bfd_put_32 (output_bfd,
8896 LIS_12 + PPC_HA (got + 4), p + 0*4);
8897 bfd_put_32 (output_bfd,
8898 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8899 bfd_put_32 (output_bfd,
8900 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8901 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8902 {
8903 bfd_put_32 (output_bfd,
8904 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8905 bfd_put_32 (output_bfd,
8906 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8907 }
8908 else
8909 {
8910 bfd_put_32 (output_bfd,
8911 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8912 bfd_put_32 (output_bfd,
8913 LWZ_12_12 + 4, p + 6*4);
8914 }
8915 }
8916 }
8917
8918 return ret;
8919 }
8920 \f
8921 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8922 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8923 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8924 #define TARGET_BIG_NAME "elf32-powerpc"
8925 #define ELF_ARCH bfd_arch_powerpc
8926 #define ELF_TARGET_ID PPC32_ELF_DATA
8927 #define ELF_MACHINE_CODE EM_PPC
8928 #ifdef __QNXTARGET__
8929 #define ELF_MAXPAGESIZE 0x1000
8930 #else
8931 #define ELF_MAXPAGESIZE 0x10000
8932 #endif
8933 #define ELF_MINPAGESIZE 0x1000
8934 #define ELF_COMMONPAGESIZE 0x1000
8935 #define elf_info_to_howto ppc_elf_info_to_howto
8936
8937 #ifdef EM_CYGNUS_POWERPC
8938 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8939 #endif
8940
8941 #ifdef EM_PPC_OLD
8942 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8943 #endif
8944
8945 #define elf_backend_plt_not_loaded 1
8946 #define elf_backend_can_gc_sections 1
8947 #define elf_backend_can_refcount 1
8948 #define elf_backend_rela_normal 1
8949
8950 #define bfd_elf32_mkobject ppc_elf_mkobject
8951 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8952 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8953 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8954 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8955 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8956 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8957 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8958
8959 #define elf_backend_object_p ppc_elf_object_p
8960 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8961 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8962 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8963 #define elf_backend_relocate_section ppc_elf_relocate_section
8964 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8965 #define elf_backend_check_relocs ppc_elf_check_relocs
8966 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8967 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8968 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8969 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8970 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8971 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8972 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8973 #define elf_backend_fake_sections ppc_elf_fake_sections
8974 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8975 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8976 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8977 #define elf_backend_write_core_note ppc_elf_write_core_note
8978 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8979 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8980 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8981 #define elf_backend_write_section ppc_elf_write_section
8982 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8983 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8984 #define elf_backend_action_discarded ppc_elf_action_discarded
8985 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8986 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8987
8988 #include "elf32-target.h"
8989
8990 /* VxWorks Target */
8991
8992 #undef TARGET_LITTLE_SYM
8993 #undef TARGET_LITTLE_NAME
8994
8995 #undef TARGET_BIG_SYM
8996 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8997 #undef TARGET_BIG_NAME
8998 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8999
9000 /* VxWorks uses the elf default section flags for .plt. */
9001 static const struct bfd_elf_special_section *
9002 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9003 {
9004 if (sec->name == NULL)
9005 return NULL;
9006
9007 if (strcmp (sec->name, ".plt") == 0)
9008 return _bfd_elf_get_sec_type_attr (abfd, sec);
9009
9010 return ppc_elf_get_sec_type_attr (abfd, sec);
9011 }
9012
9013 /* Like ppc_elf_link_hash_table_create, but overrides
9014 appropriately for VxWorks. */
9015 static struct bfd_link_hash_table *
9016 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9017 {
9018 struct bfd_link_hash_table *ret;
9019
9020 ret = ppc_elf_link_hash_table_create (abfd);
9021 if (ret)
9022 {
9023 struct ppc_elf_link_hash_table *htab
9024 = (struct ppc_elf_link_hash_table *)ret;
9025 htab->is_vxworks = 1;
9026 htab->plt_type = PLT_VXWORKS;
9027 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9028 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9029 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9030 }
9031 return ret;
9032 }
9033
9034 /* Tweak magic VxWorks symbols as they are loaded. */
9035 static bfd_boolean
9036 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9037 struct bfd_link_info *info,
9038 Elf_Internal_Sym *sym,
9039 const char **namep ATTRIBUTE_UNUSED,
9040 flagword *flagsp ATTRIBUTE_UNUSED,
9041 asection **secp,
9042 bfd_vma *valp)
9043 {
9044 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9045 valp))
9046 return FALSE;
9047
9048 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9049 }
9050
9051 static void
9052 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9053 {
9054 ppc_elf_final_write_processing(abfd, linker);
9055 elf_vxworks_final_write_processing(abfd, linker);
9056 }
9057
9058 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9059 define it. */
9060 #undef elf_backend_want_plt_sym
9061 #define elf_backend_want_plt_sym 1
9062 #undef elf_backend_want_got_plt
9063 #define elf_backend_want_got_plt 1
9064 #undef elf_backend_got_symbol_offset
9065 #define elf_backend_got_symbol_offset 0
9066 #undef elf_backend_plt_not_loaded
9067 #define elf_backend_plt_not_loaded 0
9068 #undef elf_backend_plt_readonly
9069 #define elf_backend_plt_readonly 1
9070 #undef elf_backend_got_header_size
9071 #define elf_backend_got_header_size 12
9072
9073 #undef bfd_elf32_get_synthetic_symtab
9074
9075 #undef bfd_elf32_bfd_link_hash_table_create
9076 #define bfd_elf32_bfd_link_hash_table_create \
9077 ppc_elf_vxworks_link_hash_table_create
9078 #undef elf_backend_add_symbol_hook
9079 #define elf_backend_add_symbol_hook \
9080 ppc_elf_vxworks_add_symbol_hook
9081 #undef elf_backend_link_output_symbol_hook
9082 #define elf_backend_link_output_symbol_hook \
9083 elf_vxworks_link_output_symbol_hook
9084 #undef elf_backend_final_write_processing
9085 #define elf_backend_final_write_processing \
9086 ppc_elf_vxworks_final_write_processing
9087 #undef elf_backend_get_sec_type_attr
9088 #define elf_backend_get_sec_type_attr \
9089 ppc_elf_vxworks_get_sec_type_attr
9090 #undef elf_backend_emit_relocs
9091 #define elf_backend_emit_relocs \
9092 elf_vxworks_emit_relocs
9093
9094 #undef elf32_bed
9095 #define elf32_bed ppc_elf_vxworks_bed
9096 #undef elf_backend_post_process_headers
9097
9098 #include "elf32-target.h"
GDB Binutils - Deliverables
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