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link_hash_copy_indirect and symbol flags
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable hierarchy. */
1750 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTINHERIT", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable member usage. */
1765 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTENTRY", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Phony reloc to handle AIX style TOC entries. */
1780 HOWTO (R_PPC_TOC16, /* type */
1781 0, /* rightshift */
1782 1, /* size (0 = byte, 1 = short, 2 = long) */
1783 16, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_signed, /* complain_on_overflow */
1787 ppc_elf_unhandled_reloc, /* special_function */
1788 "R_PPC_TOC16", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0xffff, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793 };
1794
1795 /* External 32-bit PPC structure for PRPSINFO. This structure is
1796 ABI-defined, thus we choose to use char arrays here in order to
1797 avoid dealing with different types in different architectures.
1798
1799 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1800 most non-PPC architectures use `short int'.
1801
1802 This structure will ultimately be written in the corefile's note
1803 section, as the PRPSINFO. */
1804
1805 struct elf_external_ppc_linux_prpsinfo32
1806 {
1807 char pr_state; /* Numeric process state. */
1808 char pr_sname; /* Char for pr_state. */
1809 char pr_zomb; /* Zombie. */
1810 char pr_nice; /* Nice val. */
1811 char pr_flag[4]; /* Flags. */
1812 char pr_uid[4];
1813 char pr_gid[4];
1814 char pr_pid[4];
1815 char pr_ppid[4];
1816 char pr_pgrp[4];
1817 char pr_sid[4];
1818 char pr_fname[16]; /* Filename of executable. */
1819 char pr_psargs[80]; /* Initial part of arg list. */
1820 };
1821
1822 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1823 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1824
1825 static inline void
1826 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1827 const struct elf_internal_linux_prpsinfo *from,
1828 struct elf_external_ppc_linux_prpsinfo32 *to)
1829 {
1830 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1831 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1832 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1833 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1834 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1835 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1836 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1837 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1838 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1839 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1840 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1841 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1842 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1843 }
1844 \f
1845 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1846
1847 static void
1848 ppc_elf_howto_init (void)
1849 {
1850 unsigned int i, type;
1851
1852 for (i = 0;
1853 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1854 i++)
1855 {
1856 type = ppc_elf_howto_raw[i].type;
1857 if (type >= (sizeof (ppc_elf_howto_table)
1858 / sizeof (ppc_elf_howto_table[0])))
1859 abort ();
1860 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1861 }
1862 }
1863
1864 static reloc_howto_type *
1865 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1866 bfd_reloc_code_real_type code)
1867 {
1868 enum elf_ppc_reloc_type r;
1869
1870 /* Initialize howto table if not already done. */
1871 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1872 ppc_elf_howto_init ();
1873
1874 switch (code)
1875 {
1876 default:
1877 return NULL;
1878
1879 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1880 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1881 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1882 case BFD_RELOC_PPC64_ADDR16_DS:
1883 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1884 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1885 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1886 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1887 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1888 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1889 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1890 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1891 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1892 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1893 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1894 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1895 case BFD_RELOC_PPC64_GOT16_DS:
1896 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1897 case BFD_RELOC_PPC64_GOT16_LO_DS:
1898 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1899 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1900 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1901 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1902 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1903 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1904 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1905 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1906 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1907 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1908 case BFD_RELOC_PPC64_PLT16_LO_DS:
1909 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1910 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1911 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1912 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1913 case BFD_RELOC_PPC64_SECTOFF_DS:
1914 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1915 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1916 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1917 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1918 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1919 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1920 case BFD_RELOC_PPC64_TOC16_DS:
1921 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1922 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1923 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1924 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1925 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1926 case BFD_RELOC_PPC64_TPREL16_DS:
1927 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1928 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1929 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1933 case BFD_RELOC_PPC64_DTPREL16_DS:
1934 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1935 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1936 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1937 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1938 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1939 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1943 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1947 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1951 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1955 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1956 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1960 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1961 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1963 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1964 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1965 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1966 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1967 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1969 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1970 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1971 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1972 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1973 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1974 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1975 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1976 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1977 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1978 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1979 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1980 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1981 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1982 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1983 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1984 r = R_PPC_VLE_SDAREL_LO16A;
1985 break;
1986 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1987 r = R_PPC_VLE_SDAREL_LO16D;
1988 break;
1989 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1990 r = R_PPC_VLE_SDAREL_HI16A;
1991 break;
1992 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1993 r = R_PPC_VLE_SDAREL_HI16D;
1994 break;
1995 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1996 r = R_PPC_VLE_SDAREL_HA16A;
1997 break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1999 r = R_PPC_VLE_SDAREL_HA16D;
2000 break;
2001 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2002 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2003 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2004 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2005 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2006 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2007 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2008 }
2009
2010 return ppc_elf_howto_table[r];
2011 };
2012
2013 static reloc_howto_type *
2014 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2015 const char *r_name)
2016 {
2017 unsigned int i;
2018
2019 for (i = 0;
2020 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2021 i++)
2022 if (ppc_elf_howto_raw[i].name != NULL
2023 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2024 return &ppc_elf_howto_raw[i];
2025
2026 return NULL;
2027 }
2028
2029 /* Set the howto pointer for a PowerPC ELF reloc. */
2030
2031 static void
2032 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2033 arelent *cache_ptr,
2034 Elf_Internal_Rela *dst)
2035 {
2036 unsigned int r_type;
2037
2038 /* Initialize howto table if not already done. */
2039 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2040 ppc_elf_howto_init ();
2041
2042 r_type = ELF32_R_TYPE (dst->r_info);
2043 if (r_type >= R_PPC_max)
2044 {
2045 /* xgettext:c-format */
2046 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2047 abfd, r_type);
2048 bfd_set_error (bfd_error_bad_value);
2049 r_type = R_PPC_NONE;
2050 }
2051 cache_ptr->howto = ppc_elf_howto_table[r_type];
2052
2053 /* Just because the above assert didn't trigger doesn't mean that
2054 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2055 if (!cache_ptr->howto)
2056 {
2057 /* xgettext:c-format */
2058 _bfd_error_handler (_("%B: invalid relocation type %d"),
2059 abfd, r_type);
2060 bfd_set_error (bfd_error_bad_value);
2061
2062 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2063 }
2064 }
2065
2066 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2067
2068 static bfd_reloc_status_type
2069 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2070 arelent *reloc_entry,
2071 asymbol *symbol,
2072 void *data ATTRIBUTE_UNUSED,
2073 asection *input_section,
2074 bfd *output_bfd,
2075 char **error_message ATTRIBUTE_UNUSED)
2076 {
2077 enum elf_ppc_reloc_type r_type;
2078 long insn;
2079 bfd_size_type octets;
2080 bfd_vma value;
2081
2082 if (output_bfd != NULL)
2083 {
2084 reloc_entry->address += input_section->output_offset;
2085 return bfd_reloc_ok;
2086 }
2087
2088 reloc_entry->addend += 0x8000;
2089 r_type = reloc_entry->howto->type;
2090 if (r_type != R_PPC_REL16DX_HA)
2091 return bfd_reloc_continue;
2092
2093 value = 0;
2094 if (!bfd_is_com_section (symbol->section))
2095 value = symbol->value;
2096 value += (reloc_entry->addend
2097 + symbol->section->output_offset
2098 + symbol->section->output_section->vma);
2099 value -= (reloc_entry->address
2100 + input_section->output_offset
2101 + input_section->output_section->vma);
2102 value >>= 16;
2103
2104 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2105 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2106 insn &= ~0x1fffc1;
2107 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2108 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2109 return bfd_reloc_ok;
2110 }
2111
2112 static bfd_reloc_status_type
2113 ppc_elf_unhandled_reloc (bfd *abfd,
2114 arelent *reloc_entry,
2115 asymbol *symbol,
2116 void *data,
2117 asection *input_section,
2118 bfd *output_bfd,
2119 char **error_message)
2120 {
2121 /* If this is a relocatable link (output_bfd test tells us), just
2122 call the generic function. Any adjustment will be done at final
2123 link time. */
2124 if (output_bfd != NULL)
2125 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2126 input_section, output_bfd, error_message);
2127
2128 if (error_message != NULL)
2129 {
2130 static char buf[60];
2131 sprintf (buf, _("generic linker can't handle %s"),
2132 reloc_entry->howto->name);
2133 *error_message = buf;
2134 }
2135 return bfd_reloc_dangerous;
2136 }
2137 \f
2138 /* Sections created by the linker. */
2139
2140 typedef struct elf_linker_section
2141 {
2142 /* Pointer to the bfd section. */
2143 asection *section;
2144 /* Section name. */
2145 const char *name;
2146 /* Associated bss section name. */
2147 const char *bss_name;
2148 /* Associated symbol name. */
2149 const char *sym_name;
2150 /* Associated symbol. */
2151 struct elf_link_hash_entry *sym;
2152 } elf_linker_section_t;
2153
2154 /* Linked list of allocated pointer entries. This hangs off of the
2155 symbol lists, and provides allows us to return different pointers,
2156 based on different addend's. */
2157
2158 typedef struct elf_linker_section_pointers
2159 {
2160 /* next allocated pointer for this symbol */
2161 struct elf_linker_section_pointers *next;
2162 /* offset of pointer from beginning of section */
2163 bfd_vma offset;
2164 /* addend used */
2165 bfd_vma addend;
2166 /* which linker section this is */
2167 elf_linker_section_t *lsect;
2168 } elf_linker_section_pointers_t;
2169
2170 struct ppc_elf_obj_tdata
2171 {
2172 struct elf_obj_tdata elf;
2173
2174 /* A mapping from local symbols to offsets into the various linker
2175 sections added. This is index by the symbol index. */
2176 elf_linker_section_pointers_t **linker_section_pointers;
2177
2178 /* Flags used to auto-detect plt type. */
2179 unsigned int makes_plt_call : 1;
2180 unsigned int has_rel16 : 1;
2181 };
2182
2183 #define ppc_elf_tdata(bfd) \
2184 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2185
2186 #define elf_local_ptr_offsets(bfd) \
2187 (ppc_elf_tdata (bfd)->linker_section_pointers)
2188
2189 #define is_ppc_elf(bfd) \
2190 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2191 && elf_object_id (bfd) == PPC32_ELF_DATA)
2192
2193 /* Override the generic function because we store some extras. */
2194
2195 static bfd_boolean
2196 ppc_elf_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2199 PPC32_ELF_DATA);
2200 }
2201
2202 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2203
2204 bfd_boolean
2205 _bfd_elf_ppc_set_arch (bfd *abfd)
2206 {
2207 unsigned long mach = 0;
2208 asection *s;
2209 unsigned char *contents;
2210
2211 if (abfd->arch_info->bits_per_word == 32
2212 && bfd_big_endian (abfd))
2213 {
2214
2215 for (s = abfd->sections; s != NULL; s = s->next)
2216 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2217 break;
2218 if (s != NULL)
2219 mach = bfd_mach_ppc_vle;
2220 }
2221
2222 if (mach == 0)
2223 {
2224 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2225 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2226 {
2227 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2228 unsigned int i;
2229
2230 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2231 {
2232 unsigned int val = bfd_get_32 (abfd, contents + i);
2233 switch (val >> 16)
2234 {
2235 case PPC_APUINFO_PMR:
2236 case PPC_APUINFO_RFMCI:
2237 if (mach == 0)
2238 mach = bfd_mach_ppc_titan;
2239 break;
2240
2241 case PPC_APUINFO_ISEL:
2242 case PPC_APUINFO_CACHELCK:
2243 if (mach == bfd_mach_ppc_titan)
2244 mach = bfd_mach_ppc_e500mc;
2245 break;
2246
2247 case PPC_APUINFO_SPE:
2248 case PPC_APUINFO_EFS:
2249 case PPC_APUINFO_BRLOCK:
2250 if (mach != bfd_mach_ppc_vle)
2251 mach = bfd_mach_ppc_e500;
2252 break;
2253
2254 case PPC_APUINFO_VLE:
2255 mach = bfd_mach_ppc_vle;
2256 break;
2257
2258 default:
2259 mach = -1ul;
2260 }
2261 }
2262 free (contents);
2263 }
2264 }
2265
2266 if (mach != 0 && mach != -1ul)
2267 {
2268 const bfd_arch_info_type *arch;
2269
2270 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2271 if (arch->mach == mach)
2272 {
2273 abfd->arch_info = arch;
2274 break;
2275 }
2276 }
2277 return TRUE;
2278 }
2279
2280 /* Fix bad default arch selected for a 32 bit input bfd when the
2281 default is 64 bit. Also select arch based on apuinfo. */
2282
2283 static bfd_boolean
2284 ppc_elf_object_p (bfd *abfd)
2285 {
2286 if (!abfd->arch_info->the_default)
2287 return TRUE;
2288
2289 if (abfd->arch_info->bits_per_word == 64)
2290 {
2291 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2292
2293 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2294 {
2295 /* Relies on arch after 64 bit default being 32 bit default. */
2296 abfd->arch_info = abfd->arch_info->next;
2297 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2298 }
2299 }
2300 return _bfd_elf_ppc_set_arch (abfd);
2301 }
2302
2303 /* Function to set whether a module needs the -mrelocatable bit set. */
2304
2305 static bfd_boolean
2306 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2307 {
2308 BFD_ASSERT (!elf_flags_init (abfd)
2309 || elf_elfheader (abfd)->e_flags == flags);
2310
2311 elf_elfheader (abfd)->e_flags = flags;
2312 elf_flags_init (abfd) = TRUE;
2313 return TRUE;
2314 }
2315
2316 /* Support for core dump NOTE sections. */
2317
2318 static bfd_boolean
2319 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2320 {
2321 int offset;
2322 unsigned int size;
2323
2324 switch (note->descsz)
2325 {
2326 default:
2327 return FALSE;
2328
2329 case 268: /* Linux/PPC. */
2330 /* pr_cursig */
2331 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2332
2333 /* pr_pid */
2334 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2335
2336 /* pr_reg */
2337 offset = 72;
2338 size = 192;
2339
2340 break;
2341 }
2342
2343 /* Make a ".reg/999" section. */
2344 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2345 size, note->descpos + offset);
2346 }
2347
2348 static bfd_boolean
2349 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2350 {
2351 switch (note->descsz)
2352 {
2353 default:
2354 return FALSE;
2355
2356 case 128: /* Linux/PPC elf_prpsinfo. */
2357 elf_tdata (abfd)->core->pid
2358 = bfd_get_32 (abfd, note->descdata + 16);
2359 elf_tdata (abfd)->core->program
2360 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2361 elf_tdata (abfd)->core->command
2362 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2363 }
2364
2365 /* Note that for some reason, a spurious space is tacked
2366 onto the end of the args in some (at least one anyway)
2367 implementations, so strip it off if it exists. */
2368
2369 {
2370 char *command = elf_tdata (abfd)->core->command;
2371 int n = strlen (command);
2372
2373 if (0 < n && command[n - 1] == ' ')
2374 command[n - 1] = '\0';
2375 }
2376
2377 return TRUE;
2378 }
2379
2380 char *
2381 elfcore_write_ppc_linux_prpsinfo32
2382 (bfd *abfd,
2383 char *buf,
2384 int *bufsiz,
2385 const struct elf_internal_linux_prpsinfo *prpsinfo)
2386 {
2387 struct elf_external_ppc_linux_prpsinfo32 data;
2388
2389 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2390 return elfcore_write_note (abfd, buf, bufsiz,
2391 "CORE", NT_PRPSINFO, &data, sizeof (data));
2392 }
2393
2394 static char *
2395 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2396 {
2397 switch (note_type)
2398 {
2399 default:
2400 return NULL;
2401
2402 case NT_PRPSINFO:
2403 {
2404 char data[128];
2405 va_list ap;
2406
2407 va_start (ap, note_type);
2408 memset (data, 0, sizeof (data));
2409 strncpy (data + 32, va_arg (ap, const char *), 16);
2410 strncpy (data + 48, va_arg (ap, const char *), 80);
2411 va_end (ap);
2412 return elfcore_write_note (abfd, buf, bufsiz,
2413 "CORE", note_type, data, sizeof (data));
2414 }
2415
2416 case NT_PRSTATUS:
2417 {
2418 char data[268];
2419 va_list ap;
2420 long pid;
2421 int cursig;
2422 const void *greg;
2423
2424 va_start (ap, note_type);
2425 memset (data, 0, 72);
2426 pid = va_arg (ap, long);
2427 bfd_put_32 (abfd, pid, data + 24);
2428 cursig = va_arg (ap, int);
2429 bfd_put_16 (abfd, cursig, data + 12);
2430 greg = va_arg (ap, const void *);
2431 memcpy (data + 72, greg, 192);
2432 memset (data + 264, 0, 4);
2433 va_end (ap);
2434 return elfcore_write_note (abfd, buf, bufsiz,
2435 "CORE", note_type, data, sizeof (data));
2436 }
2437 }
2438 }
2439
2440 static flagword
2441 ppc_elf_lookup_section_flags (char *flag_name)
2442 {
2443
2444 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2445 return SHF_PPC_VLE;
2446
2447 return 0;
2448 }
2449
2450 /* Return address for Ith PLT stub in section PLT, for relocation REL
2451 or (bfd_vma) -1 if it should not be included. */
2452
2453 static bfd_vma
2454 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2455 const asection *plt ATTRIBUTE_UNUSED,
2456 const arelent *rel)
2457 {
2458 return rel->address;
2459 }
2460
2461 /* Handle a PowerPC specific section when reading an object file. This
2462 is called when bfd_section_from_shdr finds a section with an unknown
2463 type. */
2464
2465 static bfd_boolean
2466 ppc_elf_section_from_shdr (bfd *abfd,
2467 Elf_Internal_Shdr *hdr,
2468 const char *name,
2469 int shindex)
2470 {
2471 asection *newsect;
2472 flagword flags;
2473
2474 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2475 return FALSE;
2476
2477 newsect = hdr->bfd_section;
2478 flags = bfd_get_section_flags (abfd, newsect);
2479 if (hdr->sh_flags & SHF_EXCLUDE)
2480 flags |= SEC_EXCLUDE;
2481
2482 if (hdr->sh_type == SHT_ORDERED)
2483 flags |= SEC_SORT_ENTRIES;
2484
2485 bfd_set_section_flags (abfd, newsect, flags);
2486 return TRUE;
2487 }
2488
2489 /* Set up any other section flags and such that may be necessary. */
2490
2491 static bfd_boolean
2492 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2493 Elf_Internal_Shdr *shdr,
2494 asection *asect)
2495 {
2496 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2497 shdr->sh_type = SHT_ORDERED;
2498
2499 return TRUE;
2500 }
2501
2502 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2503 need to bump up the number of section headers. */
2504
2505 static int
2506 ppc_elf_additional_program_headers (bfd *abfd,
2507 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2508 {
2509 asection *s;
2510 int ret = 0;
2511
2512 s = bfd_get_section_by_name (abfd, ".sbss2");
2513 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2514 ++ret;
2515
2516 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2517 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2518 ++ret;
2519
2520 return ret;
2521 }
2522
2523 /* Modify the segment map for VLE executables. */
2524
2525 bfd_boolean
2526 ppc_elf_modify_segment_map (bfd *abfd,
2527 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2528 {
2529 struct elf_segment_map *m;
2530
2531 /* At this point in the link, output sections have already been sorted by
2532 LMA and assigned to segments. All that is left to do is to ensure
2533 there is no mixing of VLE & non-VLE sections in a text segment.
2534 If we find that case, we split the segment.
2535 We maintain the original output section order. */
2536
2537 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2538 {
2539 struct elf_segment_map *n;
2540 bfd_size_type amt;
2541 unsigned int j, k;
2542 unsigned int p_flags;
2543
2544 if (m->p_type != PT_LOAD || m->count == 0)
2545 continue;
2546
2547 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2548 {
2549 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2550 p_flags |= PF_W;
2551 if ((m->sections[j]->flags & SEC_CODE) != 0)
2552 {
2553 p_flags |= PF_X;
2554 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2555 p_flags |= PF_PPC_VLE;
2556 break;
2557 }
2558 }
2559 if (j != m->count)
2560 while (++j != m->count)
2561 {
2562 unsigned int p_flags1 = PF_R;
2563
2564 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2565 p_flags1 |= PF_W;
2566 if ((m->sections[j]->flags & SEC_CODE) != 0)
2567 {
2568 p_flags1 |= PF_X;
2569 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2570 p_flags1 |= PF_PPC_VLE;
2571 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2572 break;
2573 }
2574 p_flags |= p_flags1;
2575 }
2576 /* If we're splitting a segment which originally contained rw
2577 sections then those sections might now only be in one of the
2578 two parts. So always set p_flags if splitting, even if we
2579 are being called for objcopy with p_flags_valid set. */
2580 if (j != m->count || !m->p_flags_valid)
2581 {
2582 m->p_flags_valid = 1;
2583 m->p_flags = p_flags;
2584 }
2585 if (j == m->count)
2586 continue;
2587
2588 /* Sections 0..j-1 stay in this (current) segment,
2589 the remainder are put in a new segment.
2590 The scan resumes with the new segment. */
2591
2592 amt = sizeof (struct elf_segment_map);
2593 amt += (m->count - j - 1) * sizeof (asection *);
2594 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2595 if (n == NULL)
2596 return FALSE;
2597
2598 n->p_type = PT_LOAD;
2599 n->count = m->count - j;
2600 for (k = 0; k < n->count; ++k)
2601 n->sections[k] = m->sections[j + k];
2602 m->count = j;
2603 m->p_size_valid = 0;
2604 n->next = m->next;
2605 m->next = n;
2606 }
2607
2608 return TRUE;
2609 }
2610
2611 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2612 .PPC.EMB.sbss0 a normal section, and not a bss section so
2613 that the linker doesn't crater when trying to make more than
2614 2 sections. */
2615
2616 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2617 {
2618 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2619 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2620 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2621 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2623 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2624 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2625 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2628 };
2629
2630 /* This is what we want for new plt/got. */
2631 static struct bfd_elf_special_section ppc_alt_plt =
2632 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2633
2634 static const struct bfd_elf_special_section *
2635 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2636 {
2637 const struct bfd_elf_special_section *ssect;
2638
2639 /* See if this is one of the special sections. */
2640 if (sec->name == NULL)
2641 return NULL;
2642
2643 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2644 sec->use_rela_p);
2645 if (ssect != NULL)
2646 {
2647 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2648 ssect = &ppc_alt_plt;
2649 return ssect;
2650 }
2651
2652 return _bfd_elf_get_sec_type_attr (abfd, sec);
2653 }
2654 \f
2655 /* Very simple linked list structure for recording apuinfo values. */
2656 typedef struct apuinfo_list
2657 {
2658 struct apuinfo_list *next;
2659 unsigned long value;
2660 }
2661 apuinfo_list;
2662
2663 static apuinfo_list *head;
2664 static bfd_boolean apuinfo_set;
2665
2666 static void
2667 apuinfo_list_init (void)
2668 {
2669 head = NULL;
2670 apuinfo_set = FALSE;
2671 }
2672
2673 static void
2674 apuinfo_list_add (unsigned long value)
2675 {
2676 apuinfo_list *entry = head;
2677
2678 while (entry != NULL)
2679 {
2680 if (entry->value == value)
2681 return;
2682 entry = entry->next;
2683 }
2684
2685 entry = bfd_malloc (sizeof (* entry));
2686 if (entry == NULL)
2687 return;
2688
2689 entry->value = value;
2690 entry->next = head;
2691 head = entry;
2692 }
2693
2694 static unsigned
2695 apuinfo_list_length (void)
2696 {
2697 apuinfo_list *entry;
2698 unsigned long count;
2699
2700 for (entry = head, count = 0;
2701 entry;
2702 entry = entry->next)
2703 ++ count;
2704
2705 return count;
2706 }
2707
2708 static inline unsigned long
2709 apuinfo_list_element (unsigned long number)
2710 {
2711 apuinfo_list * entry;
2712
2713 for (entry = head;
2714 entry && number --;
2715 entry = entry->next)
2716 ;
2717
2718 return entry ? entry->value : 0;
2719 }
2720
2721 static void
2722 apuinfo_list_finish (void)
2723 {
2724 apuinfo_list *entry;
2725
2726 for (entry = head; entry;)
2727 {
2728 apuinfo_list *next = entry->next;
2729 free (entry);
2730 entry = next;
2731 }
2732
2733 head = NULL;
2734 }
2735
2736 /* Scan the input BFDs and create a linked list of
2737 the APUinfo values that will need to be emitted. */
2738
2739 static void
2740 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2741 {
2742 bfd *ibfd;
2743 asection *asec;
2744 char *buffer = NULL;
2745 bfd_size_type largest_input_size = 0;
2746 unsigned i;
2747 unsigned long length;
2748 const char *error_message = NULL;
2749
2750 if (link_info == NULL)
2751 return;
2752
2753 apuinfo_list_init ();
2754
2755 /* Read in the input sections contents. */
2756 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2757 {
2758 unsigned long datum;
2759
2760 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2761 if (asec == NULL)
2762 continue;
2763
2764 /* xgettext:c-format */
2765 error_message = _("corrupt %s section in %B");
2766 length = asec->size;
2767 if (length < 20)
2768 goto fail;
2769
2770 apuinfo_set = TRUE;
2771 if (largest_input_size < asec->size)
2772 {
2773 if (buffer)
2774 free (buffer);
2775 largest_input_size = asec->size;
2776 buffer = bfd_malloc (largest_input_size);
2777 if (!buffer)
2778 return;
2779 }
2780
2781 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2782 || (bfd_bread (buffer, length, ibfd) != length))
2783 {
2784 /* xgettext:c-format */
2785 error_message = _("unable to read in %s section from %B");
2786 goto fail;
2787 }
2788
2789 /* Verify the contents of the header. Note - we have to
2790 extract the values this way in order to allow for a
2791 host whose endian-ness is different from the target. */
2792 datum = bfd_get_32 (ibfd, buffer);
2793 if (datum != sizeof APUINFO_LABEL)
2794 goto fail;
2795
2796 datum = bfd_get_32 (ibfd, buffer + 8);
2797 if (datum != 0x2)
2798 goto fail;
2799
2800 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2801 goto fail;
2802
2803 /* Get the number of bytes used for apuinfo entries. */
2804 datum = bfd_get_32 (ibfd, buffer + 4);
2805 if (datum + 20 != length)
2806 goto fail;
2807
2808 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2809 for (i = 0; i < datum; i += 4)
2810 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2811 }
2812
2813 error_message = NULL;
2814
2815 if (apuinfo_set)
2816 {
2817 /* Compute the size of the output section. */
2818 unsigned num_entries = apuinfo_list_length ();
2819
2820 /* Set the output section size, if it exists. */
2821 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2822
2823 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2824 {
2825 ibfd = abfd;
2826 /* xgettext:c-format */
2827 error_message = _("warning: unable to set size of %s section in %B");
2828 }
2829 }
2830
2831 fail:
2832 if (buffer)
2833 free (buffer);
2834
2835 if (error_message)
2836 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2837 }
2838
2839 /* Prevent the output section from accumulating the input sections'
2840 contents. We have already stored this in our linked list structure. */
2841
2842 static bfd_boolean
2843 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2844 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2845 asection *asec,
2846 bfd_byte *contents ATTRIBUTE_UNUSED)
2847 {
2848 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2849 }
2850
2851 /* Finally we can generate the output section. */
2852
2853 static void
2854 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2855 {
2856 bfd_byte *buffer;
2857 asection *asec;
2858 unsigned i;
2859 unsigned num_entries;
2860 bfd_size_type length;
2861
2862 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2863 if (asec == NULL)
2864 return;
2865
2866 if (!apuinfo_set)
2867 return;
2868
2869 length = asec->size;
2870 if (length < 20)
2871 return;
2872
2873 buffer = bfd_malloc (length);
2874 if (buffer == NULL)
2875 {
2876 _bfd_error_handler
2877 (_("failed to allocate space for new APUinfo section."));
2878 return;
2879 }
2880
2881 /* Create the apuinfo header. */
2882 num_entries = apuinfo_list_length ();
2883 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2884 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2885 bfd_put_32 (abfd, 0x2, buffer + 8);
2886 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2887
2888 length = 20;
2889 for (i = 0; i < num_entries; i++)
2890 {
2891 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2892 length += 4;
2893 }
2894
2895 if (length != asec->size)
2896 _bfd_error_handler (_("failed to compute new APUinfo section."));
2897
2898 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2899 _bfd_error_handler (_("failed to install new APUinfo section."));
2900
2901 free (buffer);
2902
2903 apuinfo_list_finish ();
2904 }
2905 \f
2906 static bfd_boolean
2907 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2908 {
2909 bfd_byte buf[GLINK_ENTRY_SIZE];
2910
2911 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2912 return FALSE;
2913
2914 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2915 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2916 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2917 && bfd_get_32 (abfd, buf + 12) == BCTR);
2918 }
2919
2920 static bfd_boolean
2921 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2922 {
2923 bfd_vma vma = *(bfd_vma *) ptr;
2924 return ((section->flags & SEC_ALLOC) != 0
2925 && section->vma <= vma
2926 && vma < section->vma + section->size);
2927 }
2928
2929 static long
2930 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2931 long dynsymcount, asymbol **dynsyms,
2932 asymbol **ret)
2933 {
2934 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2935 asection *plt, *relplt, *dynamic, *glink;
2936 bfd_vma glink_vma = 0;
2937 bfd_vma resolv_vma = 0;
2938 bfd_vma stub_vma;
2939 asymbol *s;
2940 arelent *p;
2941 long count, i;
2942 size_t size;
2943 char *names;
2944 bfd_byte buf[4];
2945
2946 *ret = NULL;
2947
2948 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2949 return 0;
2950
2951 if (dynsymcount <= 0)
2952 return 0;
2953
2954 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2955 if (relplt == NULL)
2956 return 0;
2957
2958 plt = bfd_get_section_by_name (abfd, ".plt");
2959 if (plt == NULL)
2960 return 0;
2961
2962 /* Call common code to handle old-style executable PLTs. */
2963 if (elf_section_flags (plt) & SHF_EXECINSTR)
2964 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2965 dynsymcount, dynsyms, ret);
2966
2967 /* If this object was prelinked, the prelinker stored the address
2968 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2969 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2970 if (dynamic != NULL)
2971 {
2972 bfd_byte *dynbuf, *extdyn, *extdynend;
2973 size_t extdynsize;
2974 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2975
2976 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2977 return -1;
2978
2979 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2980 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2981
2982 extdyn = dynbuf;
2983 extdynend = extdyn + dynamic->size;
2984 for (; extdyn < extdynend; extdyn += extdynsize)
2985 {
2986 Elf_Internal_Dyn dyn;
2987 (*swap_dyn_in) (abfd, extdyn, &dyn);
2988
2989 if (dyn.d_tag == DT_NULL)
2990 break;
2991
2992 if (dyn.d_tag == DT_PPC_GOT)
2993 {
2994 unsigned int g_o_t = dyn.d_un.d_val;
2995 asection *got = bfd_get_section_by_name (abfd, ".got");
2996 if (got != NULL
2997 && bfd_get_section_contents (abfd, got, buf,
2998 g_o_t - got->vma + 4, 4))
2999 glink_vma = bfd_get_32 (abfd, buf);
3000 break;
3001 }
3002 }
3003 free (dynbuf);
3004 }
3005
3006 /* Otherwise we read the first plt entry. */
3007 if (glink_vma == 0)
3008 {
3009 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3010 glink_vma = bfd_get_32 (abfd, buf);
3011 }
3012
3013 if (glink_vma == 0)
3014 return 0;
3015
3016 /* The .glink section usually does not survive the final
3017 link; search for the section (usually .text) where the
3018 glink stubs now reside. */
3019 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3020 if (glink == NULL)
3021 return 0;
3022
3023 /* Determine glink PLT resolver by reading the relative branch
3024 from the first glink stub. */
3025 if (bfd_get_section_contents (abfd, glink, buf,
3026 glink_vma - glink->vma, 4))
3027 {
3028 unsigned int insn = bfd_get_32 (abfd, buf);
3029
3030 /* The first glink stub may either branch to the resolver ... */
3031 insn ^= B;
3032 if ((insn & ~0x3fffffc) == 0)
3033 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3034
3035 /* ... or fall through a bunch of NOPs. */
3036 else if ((insn ^ B ^ NOP) == 0)
3037 for (i = 4;
3038 bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma + i, 4);
3040 i += 4)
3041 if (bfd_get_32 (abfd, buf) != NOP)
3042 {
3043 resolv_vma = glink_vma + i;
3044 break;
3045 }
3046 }
3047
3048 count = relplt->size / sizeof (Elf32_External_Rela);
3049 /* If the stubs are those for -shared/-pie then we might have
3050 multiple stubs for each plt entry. If that is the case then
3051 there is no way to associate stubs with their plt entries short
3052 of figuring out the GOT pointer value used in the stub. */
3053 if (!is_nonpic_glink_stub (abfd, glink,
3054 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3055 return 0;
3056
3057 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3058 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3059 return -1;
3060
3061 size = count * sizeof (asymbol);
3062 p = relplt->relocation;
3063 for (i = 0; i < count; i++, p++)
3064 {
3065 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3066 if (p->addend != 0)
3067 size += sizeof ("+0x") - 1 + 8;
3068 }
3069
3070 size += sizeof (asymbol) + sizeof ("__glink");
3071
3072 if (resolv_vma)
3073 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3074
3075 s = *ret = bfd_malloc (size);
3076 if (s == NULL)
3077 return -1;
3078
3079 stub_vma = glink_vma;
3080 names = (char *) (s + count + 1 + (resolv_vma != 0));
3081 p = relplt->relocation + count - 1;
3082 for (i = 0; i < count; i++)
3083 {
3084 size_t len;
3085
3086 *s = **p->sym_ptr_ptr;
3087 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3088 we are defining a symbol, ensure one of them is set. */
3089 if ((s->flags & BSF_LOCAL) == 0)
3090 s->flags |= BSF_GLOBAL;
3091 s->flags |= BSF_SYNTHETIC;
3092 s->section = glink;
3093 stub_vma -= 16;
3094 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3095 stub_vma -= 32;
3096 s->value = stub_vma - glink->vma;
3097 s->name = names;
3098 s->udata.p = NULL;
3099 len = strlen ((*p->sym_ptr_ptr)->name);
3100 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3101 names += len;
3102 if (p->addend != 0)
3103 {
3104 memcpy (names, "+0x", sizeof ("+0x") - 1);
3105 names += sizeof ("+0x") - 1;
3106 bfd_sprintf_vma (abfd, names, p->addend);
3107 names += strlen (names);
3108 }
3109 memcpy (names, "@plt", sizeof ("@plt"));
3110 names += sizeof ("@plt");
3111 ++s;
3112 --p;
3113 }
3114
3115 /* Add a symbol at the start of the glink branch table. */
3116 memset (s, 0, sizeof *s);
3117 s->the_bfd = abfd;
3118 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3119 s->section = glink;
3120 s->value = glink_vma - glink->vma;
3121 s->name = names;
3122 memcpy (names, "__glink", sizeof ("__glink"));
3123 names += sizeof ("__glink");
3124 s++;
3125 count++;
3126
3127 if (resolv_vma)
3128 {
3129 /* Add a symbol for the glink PLT resolver. */
3130 memset (s, 0, sizeof *s);
3131 s->the_bfd = abfd;
3132 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3133 s->section = glink;
3134 s->value = resolv_vma - glink->vma;
3135 s->name = names;
3136 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3137 names += sizeof ("__glink_PLTresolve");
3138 s++;
3139 count++;
3140 }
3141
3142 return count;
3143 }
3144 \f
3145 /* The following functions are specific to the ELF linker, while
3146 functions above are used generally. They appear in this file more
3147 or less in the order in which they are called. eg.
3148 ppc_elf_check_relocs is called early in the link process,
3149 ppc_elf_finish_dynamic_sections is one of the last functions
3150 called. */
3151
3152 /* Track PLT entries needed for a given symbol. We might need more
3153 than one glink entry per symbol when generating a pic binary. */
3154 struct plt_entry
3155 {
3156 struct plt_entry *next;
3157
3158 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3159 This field stores the offset into .got2 used to initialise the
3160 GOT pointer reg. It will always be at least 32768. (Current
3161 gcc always uses an offset of 32768, but ld -r will pack .got2
3162 sections together resulting in larger offsets). */
3163 bfd_vma addend;
3164
3165 /* The .got2 section. */
3166 asection *sec;
3167
3168 /* PLT refcount or offset. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } plt;
3174
3175 /* .glink stub offset. */
3176 bfd_vma glink_offset;
3177 };
3178
3179 /* Of those relocs that might be copied as dynamic relocs, this function
3180 selects those that must be copied when linking a shared library,
3181 even when the symbol is local. */
3182
3183 static int
3184 must_be_dyn_reloc (struct bfd_link_info *info,
3185 enum elf_ppc_reloc_type r_type)
3186 {
3187 switch (r_type)
3188 {
3189 default:
3190 return 1;
3191
3192 case R_PPC_REL24:
3193 case R_PPC_REL14:
3194 case R_PPC_REL14_BRTAKEN:
3195 case R_PPC_REL14_BRNTAKEN:
3196 case R_PPC_REL32:
3197 return 0;
3198
3199 case R_PPC_TPREL32:
3200 case R_PPC_TPREL16:
3201 case R_PPC_TPREL16_LO:
3202 case R_PPC_TPREL16_HI:
3203 case R_PPC_TPREL16_HA:
3204 return !bfd_link_executable (info);
3205 }
3206 }
3207
3208 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3209 copying dynamic variables from a shared lib into an app's dynbss
3210 section, and instead use a dynamic relocation to point into the
3211 shared lib. */
3212 #define ELIMINATE_COPY_RELOCS 1
3213
3214 /* Used to track dynamic relocations for local symbols. */
3215 struct ppc_dyn_relocs
3216 {
3217 struct ppc_dyn_relocs *next;
3218
3219 /* The input section of the reloc. */
3220 asection *sec;
3221
3222 /* Total number of relocs copied for the input section. */
3223 unsigned int count : 31;
3224
3225 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3226 unsigned int ifunc : 1;
3227 };
3228
3229 /* PPC ELF linker hash entry. */
3230
3231 struct ppc_elf_link_hash_entry
3232 {
3233 struct elf_link_hash_entry elf;
3234
3235 /* If this symbol is used in the linker created sections, the processor
3236 specific backend uses this field to map the field into the offset
3237 from the beginning of the section. */
3238 elf_linker_section_pointers_t *linker_section_pointer;
3239
3240 /* Track dynamic relocs copied for this symbol. */
3241 struct elf_dyn_relocs *dyn_relocs;
3242
3243 /* Contexts in which symbol is used in the GOT (or TOC).
3244 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3245 corresponding relocs are encountered during check_relocs.
3246 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3247 indicate the corresponding GOT entry type is not needed. */
3248 #define TLS_GD 1 /* GD reloc. */
3249 #define TLS_LD 2 /* LD reloc. */
3250 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3251 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3252 #define TLS_TLS 16 /* Any TLS reloc. */
3253 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3254 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3255 char tls_mask;
3256
3257 /* Nonzero if we have seen a small data relocation referring to this
3258 symbol. */
3259 unsigned char has_sda_refs : 1;
3260
3261 /* Flag use of given relocations. */
3262 unsigned char has_addr16_ha : 1;
3263 unsigned char has_addr16_lo : 1;
3264 };
3265
3266 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3267
3268 /* PPC ELF linker hash table. */
3269
3270 struct ppc_elf_link_hash_table
3271 {
3272 struct elf_link_hash_table elf;
3273
3274 /* Various options passed from the linker. */
3275 struct ppc_elf_params *params;
3276
3277 /* Short-cuts to get to dynamic linker sections. */
3278 asection *glink;
3279 asection *dynsbss;
3280 asection *relsbss;
3281 elf_linker_section_t sdata[2];
3282 asection *sbss;
3283 asection *glink_eh_frame;
3284
3285 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3286 asection *srelplt2;
3287
3288 /* Shortcut to __tls_get_addr. */
3289 struct elf_link_hash_entry *tls_get_addr;
3290
3291 /* The bfd that forced an old-style PLT. */
3292 bfd *old_bfd;
3293
3294 /* TLS local dynamic got entry handling. */
3295 union {
3296 bfd_signed_vma refcount;
3297 bfd_vma offset;
3298 } tlsld_got;
3299
3300 /* Offset of branch table to PltResolve function in glink. */
3301 bfd_vma glink_pltresolve;
3302
3303 /* Size of reserved GOT entries. */
3304 unsigned int got_header_size;
3305 /* Non-zero if allocating the header left a gap. */
3306 unsigned int got_gap;
3307
3308 /* The type of PLT we have chosen to use. */
3309 enum ppc_elf_plt_type plt_type;
3310
3311 /* True if the target system is VxWorks. */
3312 unsigned int is_vxworks:1;
3313
3314 /* The size of PLT entries. */
3315 int plt_entry_size;
3316 /* The distance between adjacent PLT slots. */
3317 int plt_slot_size;
3318 /* The size of the first PLT entry. */
3319 int plt_initial_entry_size;
3320
3321 /* Small local sym cache. */
3322 struct sym_cache sym_cache;
3323 };
3324
3325 /* Rename some of the generic section flags to better document how they
3326 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3327
3328 /* Nonzero if this section has TLS related relocations. */
3329 #define has_tls_reloc sec_flg0
3330
3331 /* Nonzero if this section has a call to __tls_get_addr. */
3332 #define has_tls_get_addr_call sec_flg1
3333
3334 /* Get the PPC ELF linker hash table from a link_info structure. */
3335
3336 #define ppc_elf_hash_table(p) \
3337 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3338 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3339
3340 /* Create an entry in a PPC ELF linker hash table. */
3341
3342 static struct bfd_hash_entry *
3343 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3344 struct bfd_hash_table *table,
3345 const char *string)
3346 {
3347 /* Allocate the structure if it has not already been allocated by a
3348 subclass. */
3349 if (entry == NULL)
3350 {
3351 entry = bfd_hash_allocate (table,
3352 sizeof (struct ppc_elf_link_hash_entry));
3353 if (entry == NULL)
3354 return entry;
3355 }
3356
3357 /* Call the allocation method of the superclass. */
3358 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3359 if (entry != NULL)
3360 {
3361 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3362 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3363 ppc_elf_hash_entry (entry)->tls_mask = 0;
3364 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3365 }
3366
3367 return entry;
3368 }
3369
3370 /* Create a PPC ELF linker hash table. */
3371
3372 static struct bfd_link_hash_table *
3373 ppc_elf_link_hash_table_create (bfd *abfd)
3374 {
3375 struct ppc_elf_link_hash_table *ret;
3376 static struct ppc_elf_params default_params
3377 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3378
3379 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3380 if (ret == NULL)
3381 return NULL;
3382
3383 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3384 ppc_elf_link_hash_newfunc,
3385 sizeof (struct ppc_elf_link_hash_entry),
3386 PPC32_ELF_DATA))
3387 {
3388 free (ret);
3389 return NULL;
3390 }
3391
3392 ret->elf.init_plt_refcount.refcount = 0;
3393 ret->elf.init_plt_refcount.glist = NULL;
3394 ret->elf.init_plt_offset.offset = 0;
3395 ret->elf.init_plt_offset.glist = NULL;
3396
3397 ret->params = &default_params;
3398
3399 ret->sdata[0].name = ".sdata";
3400 ret->sdata[0].sym_name = "_SDA_BASE_";
3401 ret->sdata[0].bss_name = ".sbss";
3402
3403 ret->sdata[1].name = ".sdata2";
3404 ret->sdata[1].sym_name = "_SDA2_BASE_";
3405 ret->sdata[1].bss_name = ".sbss2";
3406
3407 ret->plt_entry_size = 12;
3408 ret->plt_slot_size = 8;
3409 ret->plt_initial_entry_size = 72;
3410
3411 return &ret->elf.root;
3412 }
3413
3414 /* Hook linker params into hash table. */
3415
3416 void
3417 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3418 {
3419 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3420
3421 if (htab)
3422 htab->params = params;
3423 params->pagesize_p2 = bfd_log2 (params->pagesize);
3424 }
3425
3426 /* Create .got and the related sections. */
3427
3428 static bfd_boolean
3429 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432
3433 if (!_bfd_elf_create_got_section (abfd, info))
3434 return FALSE;
3435
3436 htab = ppc_elf_hash_table (info);
3437 if (!htab->is_vxworks)
3438 {
3439 /* The powerpc .got has a blrl instruction in it. Mark it
3440 executable. */
3441 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3442 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3443 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3444 return FALSE;
3445 }
3446
3447 return TRUE;
3448 }
3449
3450 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3451 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3452 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3453
3454 static bfd_boolean
3455 ppc_elf_create_linker_section (bfd *abfd,
3456 struct bfd_link_info *info,
3457 flagword flags,
3458 elf_linker_section_t *lsect)
3459 {
3460 asection *s;
3461
3462 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3463 | SEC_LINKER_CREATED);
3464
3465 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3466 if (s == NULL)
3467 return FALSE;
3468 lsect->section = s;
3469
3470 /* Define the sym on the first section of this name. */
3471 s = bfd_get_section_by_name (abfd, lsect->name);
3472
3473 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3474 if (lsect->sym == NULL)
3475 return FALSE;
3476 lsect->sym->root.u.def.value = 0x8000;
3477 return TRUE;
3478 }
3479
3480 static bfd_boolean
3481 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3482 {
3483 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3484 asection *s;
3485 flagword flags;
3486
3487 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3488 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3489 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3490 htab->glink = s;
3491 if (s == NULL
3492 || !bfd_set_section_alignment (abfd, s,
3493 htab->params->ppc476_workaround ? 6 : 4))
3494 return FALSE;
3495
3496 if (!info->no_ld_generated_unwind_info)
3497 {
3498 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3499 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3500 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3501 htab->glink_eh_frame = s;
3502 if (s == NULL
3503 || !bfd_set_section_alignment (abfd, s, 2))
3504 return FALSE;
3505 }
3506
3507 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3508 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3509 htab->elf.iplt = s;
3510 if (s == NULL
3511 || !bfd_set_section_alignment (abfd, s, 4))
3512 return FALSE;
3513
3514 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3516 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3517 htab->elf.irelplt = s;
3518 if (s == NULL
3519 || ! bfd_set_section_alignment (abfd, s, 2))
3520 return FALSE;
3521
3522 if (!ppc_elf_create_linker_section (abfd, info, 0,
3523 &htab->sdata[0]))
3524 return FALSE;
3525
3526 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3527 &htab->sdata[1]))
3528 return FALSE;
3529
3530 return TRUE;
3531 }
3532
3533 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3534 to output sections (just like _bfd_elf_create_dynamic_sections has
3535 to create .dynbss and .rela.bss). */
3536
3537 static bfd_boolean
3538 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3539 {
3540 struct ppc_elf_link_hash_table *htab;
3541 asection *s;
3542 flagword flags;
3543
3544 htab = ppc_elf_hash_table (info);
3545
3546 if (htab->elf.sgot == NULL
3547 && !ppc_elf_create_got (abfd, info))
3548 return FALSE;
3549
3550 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3551 return FALSE;
3552
3553 if (htab->glink == NULL
3554 && !ppc_elf_create_glink (abfd, info))
3555 return FALSE;
3556
3557 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3558 SEC_ALLOC | SEC_LINKER_CREATED);
3559 htab->dynsbss = s;
3560 if (s == NULL)
3561 return FALSE;
3562
3563 if (! bfd_link_pic (info))
3564 {
3565 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3567 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3568 htab->relsbss = s;
3569 if (s == NULL
3570 || ! bfd_set_section_alignment (abfd, s, 2))
3571 return FALSE;
3572 }
3573
3574 if (htab->is_vxworks
3575 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3576 return FALSE;
3577
3578 s = htab->elf.splt;
3579 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3580 if (htab->plt_type == PLT_VXWORKS)
3581 /* The VxWorks PLT is a loaded section with contents. */
3582 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3583 return bfd_set_section_flags (abfd, s, flags);
3584 }
3585
3586 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3587
3588 static void
3589 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3590 struct elf_link_hash_entry *dir,
3591 struct elf_link_hash_entry *ind)
3592 {
3593 struct ppc_elf_link_hash_entry *edir, *eind;
3594
3595 edir = (struct ppc_elf_link_hash_entry *) dir;
3596 eind = (struct ppc_elf_link_hash_entry *) ind;
3597
3598 edir->tls_mask |= eind->tls_mask;
3599 edir->has_sda_refs |= eind->has_sda_refs;
3600
3601 /* If called to transfer flags for a weakdef during processing
3602 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3603 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3604 if (!(ELIMINATE_COPY_RELOCS
3605 && eind->elf.root.type != bfd_link_hash_indirect
3606 && edir->elf.dynamic_adjusted))
3607 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3608
3609 if (edir->elf.versioned != versioned_hidden)
3610 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3611 edir->elf.ref_regular |= eind->elf.ref_regular;
3612 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3613 edir->elf.needs_plt |= eind->elf.needs_plt;
3614 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3615
3616 if (eind->dyn_relocs != NULL)
3617 {
3618 if (edir->dyn_relocs != NULL)
3619 {
3620 struct elf_dyn_relocs **pp;
3621 struct elf_dyn_relocs *p;
3622
3623 /* Add reloc counts against the indirect sym to the direct sym
3624 list. Merge any entries against the same section. */
3625 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3626 {
3627 struct elf_dyn_relocs *q;
3628
3629 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3630 if (q->sec == p->sec)
3631 {
3632 q->pc_count += p->pc_count;
3633 q->count += p->count;
3634 *pp = p->next;
3635 break;
3636 }
3637 if (q == NULL)
3638 pp = &p->next;
3639 }
3640 *pp = edir->dyn_relocs;
3641 }
3642
3643 edir->dyn_relocs = eind->dyn_relocs;
3644 eind->dyn_relocs = NULL;
3645 }
3646
3647 /* If we were called to copy over info for a weak sym, that's all.
3648 You might think dyn_relocs need not be copied over; After all,
3649 both syms will be dynamic or both non-dynamic so we're just
3650 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3651 code in ppc_elf_adjust_dynamic_symbol needs to check for
3652 dyn_relocs in read-only sections, and it does so on what is the
3653 DIR sym here. */
3654 if (eind->elf.root.type != bfd_link_hash_indirect)
3655 return;
3656
3657 /* Copy over the GOT refcount entries that we may have already seen to
3658 the symbol which just became indirect. */
3659 edir->elf.got.refcount += eind->elf.got.refcount;
3660 eind->elf.got.refcount = 0;
3661
3662 /* And plt entries. */
3663 if (eind->elf.plt.plist != NULL)
3664 {
3665 if (edir->elf.plt.plist != NULL)
3666 {
3667 struct plt_entry **entp;
3668 struct plt_entry *ent;
3669
3670 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3671 {
3672 struct plt_entry *dent;
3673
3674 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3675 if (dent->sec == ent->sec && dent->addend == ent->addend)
3676 {
3677 dent->plt.refcount += ent->plt.refcount;
3678 *entp = ent->next;
3679 break;
3680 }
3681 if (dent == NULL)
3682 entp = &ent->next;
3683 }
3684 *entp = edir->elf.plt.plist;
3685 }
3686
3687 edir->elf.plt.plist = eind->elf.plt.plist;
3688 eind->elf.plt.plist = NULL;
3689 }
3690
3691 if (eind->elf.dynindx != -1)
3692 {
3693 if (edir->elf.dynindx != -1)
3694 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3695 edir->elf.dynstr_index);
3696 edir->elf.dynindx = eind->elf.dynindx;
3697 edir->elf.dynstr_index = eind->elf.dynstr_index;
3698 eind->elf.dynindx = -1;
3699 eind->elf.dynstr_index = 0;
3700 }
3701 }
3702
3703 /* Hook called by the linker routine which adds symbols from an object
3704 file. We use it to put .comm items in .sbss, and not .bss. */
3705
3706 static bfd_boolean
3707 ppc_elf_add_symbol_hook (bfd *abfd,
3708 struct bfd_link_info *info,
3709 Elf_Internal_Sym *sym,
3710 const char **namep ATTRIBUTE_UNUSED,
3711 flagword *flagsp ATTRIBUTE_UNUSED,
3712 asection **secp,
3713 bfd_vma *valp)
3714 {
3715 if (sym->st_shndx == SHN_COMMON
3716 && !bfd_link_relocatable (info)
3717 && is_ppc_elf (info->output_bfd)
3718 && sym->st_size <= elf_gp_size (abfd))
3719 {
3720 /* Common symbols less than or equal to -G nn bytes are automatically
3721 put into .sbss. */
3722 struct ppc_elf_link_hash_table *htab;
3723
3724 htab = ppc_elf_hash_table (info);
3725 if (htab->sbss == NULL)
3726 {
3727 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3728
3729 if (!htab->elf.dynobj)
3730 htab->elf.dynobj = abfd;
3731
3732 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3733 ".sbss",
3734 flags);
3735 if (htab->sbss == NULL)
3736 return FALSE;
3737 }
3738
3739 *secp = htab->sbss;
3740 *valp = sym->st_size;
3741 }
3742
3743 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3744 && (abfd->flags & DYNAMIC) == 0
3745 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3746 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3747
3748 return TRUE;
3749 }
3750 \f
3751 /* Find a linker generated pointer with a given addend and type. */
3752
3753 static elf_linker_section_pointers_t *
3754 elf_find_pointer_linker_section
3755 (elf_linker_section_pointers_t *linker_pointers,
3756 bfd_vma addend,
3757 elf_linker_section_t *lsect)
3758 {
3759 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3760 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3761 return linker_pointers;
3762
3763 return NULL;
3764 }
3765
3766 /* Allocate a pointer to live in a linker created section. */
3767
3768 static bfd_boolean
3769 elf_allocate_pointer_linker_section (bfd *abfd,
3770 elf_linker_section_t *lsect,
3771 struct elf_link_hash_entry *h,
3772 const Elf_Internal_Rela *rel)
3773 {
3774 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3775 elf_linker_section_pointers_t *linker_section_ptr;
3776 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3777 bfd_size_type amt;
3778
3779 BFD_ASSERT (lsect != NULL);
3780
3781 /* Is this a global symbol? */
3782 if (h != NULL)
3783 {
3784 struct ppc_elf_link_hash_entry *eh;
3785
3786 /* Has this symbol already been allocated? If so, our work is done. */
3787 eh = (struct ppc_elf_link_hash_entry *) h;
3788 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3789 rel->r_addend,
3790 lsect))
3791 return TRUE;
3792
3793 ptr_linker_section_ptr = &eh->linker_section_pointer;
3794 }
3795 else
3796 {
3797 BFD_ASSERT (is_ppc_elf (abfd));
3798
3799 /* Allocation of a pointer to a local symbol. */
3800 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3801
3802 /* Allocate a table to hold the local symbols if first time. */
3803 if (!ptr)
3804 {
3805 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3806
3807 amt = num_symbols;
3808 amt *= sizeof (elf_linker_section_pointers_t *);
3809 ptr = bfd_zalloc (abfd, amt);
3810
3811 if (!ptr)
3812 return FALSE;
3813
3814 elf_local_ptr_offsets (abfd) = ptr;
3815 }
3816
3817 /* Has this symbol already been allocated? If so, our work is done. */
3818 if (elf_find_pointer_linker_section (ptr[r_symndx],
3819 rel->r_addend,
3820 lsect))
3821 return TRUE;
3822
3823 ptr_linker_section_ptr = &ptr[r_symndx];
3824 }
3825
3826 /* Allocate space for a pointer in the linker section, and allocate
3827 a new pointer record from internal memory. */
3828 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3829 amt = sizeof (elf_linker_section_pointers_t);
3830 linker_section_ptr = bfd_alloc (abfd, amt);
3831
3832 if (!linker_section_ptr)
3833 return FALSE;
3834
3835 linker_section_ptr->next = *ptr_linker_section_ptr;
3836 linker_section_ptr->addend = rel->r_addend;
3837 linker_section_ptr->lsect = lsect;
3838 *ptr_linker_section_ptr = linker_section_ptr;
3839
3840 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3841 return FALSE;
3842 linker_section_ptr->offset = lsect->section->size;
3843 lsect->section->size += 4;
3844
3845 #ifdef DEBUG
3846 fprintf (stderr,
3847 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3848 lsect->name, (long) linker_section_ptr->offset,
3849 (long) lsect->section->size);
3850 #endif
3851
3852 return TRUE;
3853 }
3854
3855 static struct plt_entry **
3856 update_local_sym_info (bfd *abfd,
3857 Elf_Internal_Shdr *symtab_hdr,
3858 unsigned long r_symndx,
3859 int tls_type)
3860 {
3861 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3862 struct plt_entry **local_plt;
3863 char *local_got_tls_masks;
3864
3865 if (local_got_refcounts == NULL)
3866 {
3867 bfd_size_type size = symtab_hdr->sh_info;
3868
3869 size *= (sizeof (*local_got_refcounts)
3870 + sizeof (*local_plt)
3871 + sizeof (*local_got_tls_masks));
3872 local_got_refcounts = bfd_zalloc (abfd, size);
3873 if (local_got_refcounts == NULL)
3874 return NULL;
3875 elf_local_got_refcounts (abfd) = local_got_refcounts;
3876 }
3877
3878 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3879 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3880 local_got_tls_masks[r_symndx] |= tls_type;
3881 if (tls_type != PLT_IFUNC)
3882 local_got_refcounts[r_symndx] += 1;
3883 return local_plt + r_symndx;
3884 }
3885
3886 static bfd_boolean
3887 update_plt_info (bfd *abfd, struct plt_entry **plist,
3888 asection *sec, bfd_vma addend)
3889 {
3890 struct plt_entry *ent;
3891
3892 if (addend < 32768)
3893 sec = NULL;
3894 for (ent = *plist; ent != NULL; ent = ent->next)
3895 if (ent->sec == sec && ent->addend == addend)
3896 break;
3897 if (ent == NULL)
3898 {
3899 bfd_size_type amt = sizeof (*ent);
3900 ent = bfd_alloc (abfd, amt);
3901 if (ent == NULL)
3902 return FALSE;
3903 ent->next = *plist;
3904 ent->sec = sec;
3905 ent->addend = addend;
3906 ent->plt.refcount = 0;
3907 *plist = ent;
3908 }
3909 ent->plt.refcount += 1;
3910 return TRUE;
3911 }
3912
3913 static struct plt_entry *
3914 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3915 {
3916 struct plt_entry *ent;
3917
3918 if (addend < 32768)
3919 sec = NULL;
3920 for (ent = *plist; ent != NULL; ent = ent->next)
3921 if (ent->sec == sec && ent->addend == addend)
3922 break;
3923 return ent;
3924 }
3925
3926 static bfd_boolean
3927 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3928 {
3929 return (r_type == R_PPC_PLTREL24
3930 || r_type == R_PPC_LOCAL24PC
3931 || r_type == R_PPC_REL24
3932 || r_type == R_PPC_REL14
3933 || r_type == R_PPC_REL14_BRTAKEN
3934 || r_type == R_PPC_REL14_BRNTAKEN
3935 || r_type == R_PPC_ADDR24
3936 || r_type == R_PPC_ADDR14
3937 || r_type == R_PPC_ADDR14_BRTAKEN
3938 || r_type == R_PPC_ADDR14_BRNTAKEN
3939 || r_type == R_PPC_VLE_REL24);
3940 }
3941
3942 static void
3943 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3944 {
3945 _bfd_error_handler
3946 /* xgettext:c-format */
3947 (_("%B: relocation %s cannot be used when making a shared object"),
3948 abfd,
3949 ppc_elf_howto_table[r_type]->name);
3950 bfd_set_error (bfd_error_bad_value);
3951 }
3952
3953 /* Look through the relocs for a section during the first phase, and
3954 allocate space in the global offset table or procedure linkage
3955 table. */
3956
3957 static bfd_boolean
3958 ppc_elf_check_relocs (bfd *abfd,
3959 struct bfd_link_info *info,
3960 asection *sec,
3961 const Elf_Internal_Rela *relocs)
3962 {
3963 struct ppc_elf_link_hash_table *htab;
3964 Elf_Internal_Shdr *symtab_hdr;
3965 struct elf_link_hash_entry **sym_hashes;
3966 const Elf_Internal_Rela *rel;
3967 const Elf_Internal_Rela *rel_end;
3968 asection *got2, *sreloc;
3969 struct elf_link_hash_entry *tga;
3970
3971 if (bfd_link_relocatable (info))
3972 return TRUE;
3973
3974 /* Don't do anything special with non-loaded, non-alloced sections.
3975 In particular, any relocs in such sections should not affect GOT
3976 and PLT reference counting (ie. we don't allow them to create GOT
3977 or PLT entries), there's no possibility or desire to optimize TLS
3978 relocs, and there's not much point in propagating relocs to shared
3979 libs that the dynamic linker won't relocate. */
3980 if ((sec->flags & SEC_ALLOC) == 0)
3981 return TRUE;
3982
3983 #ifdef DEBUG
3984 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3985 sec, abfd);
3986 #endif
3987
3988 BFD_ASSERT (is_ppc_elf (abfd));
3989
3990 /* Initialize howto table if not already done. */
3991 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3992 ppc_elf_howto_init ();
3993
3994 htab = ppc_elf_hash_table (info);
3995 if (htab->glink == NULL)
3996 {
3997 if (htab->elf.dynobj == NULL)
3998 htab->elf.dynobj = abfd;
3999 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4000 return FALSE;
4001 }
4002 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4003 FALSE, FALSE, TRUE);
4004 symtab_hdr = &elf_symtab_hdr (abfd);
4005 sym_hashes = elf_sym_hashes (abfd);
4006 got2 = bfd_get_section_by_name (abfd, ".got2");
4007 sreloc = NULL;
4008
4009 rel_end = relocs + sec->reloc_count;
4010 for (rel = relocs; rel < rel_end; rel++)
4011 {
4012 unsigned long r_symndx;
4013 enum elf_ppc_reloc_type r_type;
4014 struct elf_link_hash_entry *h;
4015 int tls_type;
4016 struct plt_entry **ifunc;
4017
4018 r_symndx = ELF32_R_SYM (rel->r_info);
4019 if (r_symndx < symtab_hdr->sh_info)
4020 h = NULL;
4021 else
4022 {
4023 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4024 while (h->root.type == bfd_link_hash_indirect
4025 || h->root.type == bfd_link_hash_warning)
4026 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4027
4028 /* PR15323, ref flags aren't set for references in the same
4029 object. */
4030 h->root.non_ir_ref = 1;
4031 }
4032
4033 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4034 This shows up in particular in an R_PPC_ADDR32 in the eabi
4035 startup code. */
4036 if (h != NULL
4037 && htab->elf.sgot == NULL
4038 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4039 {
4040 if (htab->elf.dynobj == NULL)
4041 htab->elf.dynobj = abfd;
4042 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4043 return FALSE;
4044 BFD_ASSERT (h == htab->elf.hgot);
4045 }
4046
4047 tls_type = 0;
4048 r_type = ELF32_R_TYPE (rel->r_info);
4049 ifunc = NULL;
4050 if (h == NULL && !htab->is_vxworks)
4051 {
4052 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4053 abfd, r_symndx);
4054 if (isym == NULL)
4055 return FALSE;
4056
4057 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4058 {
4059 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4060 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4061 PLT_IFUNC);
4062 if (ifunc == NULL)
4063 return FALSE;
4064
4065 /* STT_GNU_IFUNC symbols must have a PLT entry;
4066 In a non-pie executable even when there are
4067 no plt calls. */
4068 if (!bfd_link_pic (info)
4069 || is_branch_reloc (r_type))
4070 {
4071 bfd_vma addend = 0;
4072 if (r_type == R_PPC_PLTREL24)
4073 {
4074 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4075 if (bfd_link_pic (info))
4076 addend = rel->r_addend;
4077 }
4078 if (!update_plt_info (abfd, ifunc, got2, addend))
4079 return FALSE;
4080 }
4081 }
4082 }
4083
4084 if (!htab->is_vxworks
4085 && is_branch_reloc (r_type)
4086 && h != NULL
4087 && h == tga)
4088 {
4089 if (rel != relocs
4090 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4091 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4092 /* We have a new-style __tls_get_addr call with a marker
4093 reloc. */
4094 ;
4095 else
4096 /* Mark this section as having an old-style call. */
4097 sec->has_tls_get_addr_call = 1;
4098 }
4099
4100 switch (r_type)
4101 {
4102 case R_PPC_TLSGD:
4103 case R_PPC_TLSLD:
4104 /* These special tls relocs tie a call to __tls_get_addr with
4105 its parameter symbol. */
4106 break;
4107
4108 case R_PPC_GOT_TLSLD16:
4109 case R_PPC_GOT_TLSLD16_LO:
4110 case R_PPC_GOT_TLSLD16_HI:
4111 case R_PPC_GOT_TLSLD16_HA:
4112 tls_type = TLS_TLS | TLS_LD;
4113 goto dogottls;
4114
4115 case R_PPC_GOT_TLSGD16:
4116 case R_PPC_GOT_TLSGD16_LO:
4117 case R_PPC_GOT_TLSGD16_HI:
4118 case R_PPC_GOT_TLSGD16_HA:
4119 tls_type = TLS_TLS | TLS_GD;
4120 goto dogottls;
4121
4122 case R_PPC_GOT_TPREL16:
4123 case R_PPC_GOT_TPREL16_LO:
4124 case R_PPC_GOT_TPREL16_HI:
4125 case R_PPC_GOT_TPREL16_HA:
4126 if (bfd_link_pic (info))
4127 info->flags |= DF_STATIC_TLS;
4128 tls_type = TLS_TLS | TLS_TPREL;
4129 goto dogottls;
4130
4131 case R_PPC_GOT_DTPREL16:
4132 case R_PPC_GOT_DTPREL16_LO:
4133 case R_PPC_GOT_DTPREL16_HI:
4134 case R_PPC_GOT_DTPREL16_HA:
4135 tls_type = TLS_TLS | TLS_DTPREL;
4136 dogottls:
4137 sec->has_tls_reloc = 1;
4138 /* Fall through. */
4139
4140 /* GOT16 relocations */
4141 case R_PPC_GOT16:
4142 case R_PPC_GOT16_LO:
4143 case R_PPC_GOT16_HI:
4144 case R_PPC_GOT16_HA:
4145 /* This symbol requires a global offset table entry. */
4146 if (htab->elf.sgot == NULL)
4147 {
4148 if (htab->elf.dynobj == NULL)
4149 htab->elf.dynobj = abfd;
4150 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4151 return FALSE;
4152 }
4153 if (h != NULL)
4154 {
4155 h->got.refcount += 1;
4156 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4157 }
4158 else
4159 /* This is a global offset table entry for a local symbol. */
4160 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4161 return FALSE;
4162
4163 /* We may also need a plt entry if the symbol turns out to be
4164 an ifunc. */
4165 if (h != NULL && !bfd_link_pic (info))
4166 {
4167 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4168 return FALSE;
4169 }
4170 break;
4171
4172 /* Indirect .sdata relocation. */
4173 case R_PPC_EMB_SDAI16:
4174 if (bfd_link_pic (info))
4175 {
4176 bad_shared_reloc (abfd, r_type);
4177 return FALSE;
4178 }
4179 htab->sdata[0].sym->ref_regular = 1;
4180 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4181 h, rel))
4182 return FALSE;
4183 if (h != NULL)
4184 {
4185 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4186 h->non_got_ref = TRUE;
4187 }
4188 break;
4189
4190 /* Indirect .sdata2 relocation. */
4191 case R_PPC_EMB_SDA2I16:
4192 if (bfd_link_pic (info))
4193 {
4194 bad_shared_reloc (abfd, r_type);
4195 return FALSE;
4196 }
4197 htab->sdata[1].sym->ref_regular = 1;
4198 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4199 h, rel))
4200 return FALSE;
4201 if (h != NULL)
4202 {
4203 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4204 h->non_got_ref = TRUE;
4205 }
4206 break;
4207
4208 case R_PPC_SDAREL16:
4209 htab->sdata[0].sym->ref_regular = 1;
4210 /* Fall through. */
4211
4212 case R_PPC_VLE_SDAREL_LO16A:
4213 case R_PPC_VLE_SDAREL_LO16D:
4214 case R_PPC_VLE_SDAREL_HI16A:
4215 case R_PPC_VLE_SDAREL_HI16D:
4216 case R_PPC_VLE_SDAREL_HA16A:
4217 case R_PPC_VLE_SDAREL_HA16D:
4218 if (h != NULL)
4219 {
4220 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4221 h->non_got_ref = TRUE;
4222 }
4223 break;
4224
4225 case R_PPC_VLE_REL8:
4226 case R_PPC_VLE_REL15:
4227 case R_PPC_VLE_REL24:
4228 case R_PPC_VLE_LO16A:
4229 case R_PPC_VLE_LO16D:
4230 case R_PPC_VLE_HI16A:
4231 case R_PPC_VLE_HI16D:
4232 case R_PPC_VLE_HA16A:
4233 case R_PPC_VLE_HA16D:
4234 break;
4235
4236 case R_PPC_EMB_SDA2REL:
4237 if (bfd_link_pic (info))
4238 {
4239 bad_shared_reloc (abfd, r_type);
4240 return FALSE;
4241 }
4242 htab->sdata[1].sym->ref_regular = 1;
4243 if (h != NULL)
4244 {
4245 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4246 h->non_got_ref = TRUE;
4247 }
4248 break;
4249
4250 case R_PPC_VLE_SDA21_LO:
4251 case R_PPC_VLE_SDA21:
4252 case R_PPC_EMB_SDA21:
4253 case R_PPC_EMB_RELSDA:
4254 if (bfd_link_pic (info))
4255 {
4256 bad_shared_reloc (abfd, r_type);
4257 return FALSE;
4258 }
4259 if (h != NULL)
4260 {
4261 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4262 h->non_got_ref = TRUE;
4263 }
4264 break;
4265
4266 case R_PPC_EMB_NADDR32:
4267 case R_PPC_EMB_NADDR16:
4268 case R_PPC_EMB_NADDR16_LO:
4269 case R_PPC_EMB_NADDR16_HI:
4270 case R_PPC_EMB_NADDR16_HA:
4271 if (bfd_link_pic (info))
4272 {
4273 bad_shared_reloc (abfd, r_type);
4274 return FALSE;
4275 }
4276 if (h != NULL)
4277 h->non_got_ref = TRUE;
4278 break;
4279
4280 case R_PPC_PLTREL24:
4281 if (h == NULL)
4282 break;
4283 /* Fall through */
4284 case R_PPC_PLT32:
4285 case R_PPC_PLTREL32:
4286 case R_PPC_PLT16_LO:
4287 case R_PPC_PLT16_HI:
4288 case R_PPC_PLT16_HA:
4289 #ifdef DEBUG
4290 fprintf (stderr, "Reloc requires a PLT entry\n");
4291 #endif
4292 /* This symbol requires a procedure linkage table entry. */
4293 if (h == NULL)
4294 {
4295 if (ifunc == NULL)
4296 {
4297 /* It does not make sense to have a procedure linkage
4298 table entry for a non-ifunc local symbol. */
4299 info->callbacks->einfo
4300 /* xgettext:c-format */
4301 (_("%P: %H: %s reloc against local symbol\n"),
4302 abfd, sec, rel->r_offset,
4303 ppc_elf_howto_table[r_type]->name);
4304 bfd_set_error (bfd_error_bad_value);
4305 return FALSE;
4306 }
4307 }
4308 else
4309 {
4310 bfd_vma addend = 0;
4311
4312 if (r_type == R_PPC_PLTREL24)
4313 {
4314 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4315 if (bfd_link_pic (info))
4316 addend = rel->r_addend;
4317 }
4318 h->needs_plt = 1;
4319 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4320 return FALSE;
4321 }
4322 break;
4323
4324 /* The following relocations don't need to propagate the
4325 relocation if linking a shared object since they are
4326 section relative. */
4327 case R_PPC_SECTOFF:
4328 case R_PPC_SECTOFF_LO:
4329 case R_PPC_SECTOFF_HI:
4330 case R_PPC_SECTOFF_HA:
4331 case R_PPC_DTPREL16:
4332 case R_PPC_DTPREL16_LO:
4333 case R_PPC_DTPREL16_HI:
4334 case R_PPC_DTPREL16_HA:
4335 case R_PPC_TOC16:
4336 break;
4337
4338 case R_PPC_REL16:
4339 case R_PPC_REL16_LO:
4340 case R_PPC_REL16_HI:
4341 case R_PPC_REL16_HA:
4342 case R_PPC_REL16DX_HA:
4343 ppc_elf_tdata (abfd)->has_rel16 = 1;
4344 break;
4345
4346 /* These are just markers. */
4347 case R_PPC_TLS:
4348 case R_PPC_EMB_MRKREF:
4349 case R_PPC_NONE:
4350 case R_PPC_max:
4351 case R_PPC_RELAX:
4352 case R_PPC_RELAX_PLT:
4353 case R_PPC_RELAX_PLTREL24:
4354 break;
4355
4356 /* These should only appear in dynamic objects. */
4357 case R_PPC_COPY:
4358 case R_PPC_GLOB_DAT:
4359 case R_PPC_JMP_SLOT:
4360 case R_PPC_RELATIVE:
4361 case R_PPC_IRELATIVE:
4362 break;
4363
4364 /* These aren't handled yet. We'll report an error later. */
4365 case R_PPC_ADDR30:
4366 case R_PPC_EMB_RELSEC16:
4367 case R_PPC_EMB_RELST_LO:
4368 case R_PPC_EMB_RELST_HI:
4369 case R_PPC_EMB_RELST_HA:
4370 case R_PPC_EMB_BIT_FLD:
4371 break;
4372
4373 /* This refers only to functions defined in the shared library. */
4374 case R_PPC_LOCAL24PC:
4375 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4376 {
4377 htab->plt_type = PLT_OLD;
4378 htab->old_bfd = abfd;
4379 }
4380 if (h != NULL && h->type == STT_GNU_IFUNC)
4381 {
4382 h->needs_plt = 1;
4383 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4384 return FALSE;
4385 }
4386 break;
4387
4388 /* This relocation describes the C++ object vtable hierarchy.
4389 Reconstruct it for later use during GC. */
4390 case R_PPC_GNU_VTINHERIT:
4391 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4392 return FALSE;
4393 break;
4394
4395 /* This relocation describes which C++ vtable entries are actually
4396 used. Record for later use during GC. */
4397 case R_PPC_GNU_VTENTRY:
4398 BFD_ASSERT (h != NULL);
4399 if (h != NULL
4400 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4401 return FALSE;
4402 break;
4403
4404 /* We shouldn't really be seeing these. */
4405 case R_PPC_TPREL32:
4406 case R_PPC_TPREL16:
4407 case R_PPC_TPREL16_LO:
4408 case R_PPC_TPREL16_HI:
4409 case R_PPC_TPREL16_HA:
4410 if (bfd_link_pic (info))
4411 info->flags |= DF_STATIC_TLS;
4412 goto dodyn;
4413
4414 /* Nor these. */
4415 case R_PPC_DTPMOD32:
4416 case R_PPC_DTPREL32:
4417 goto dodyn;
4418
4419 case R_PPC_REL32:
4420 if (h == NULL
4421 && got2 != NULL
4422 && (sec->flags & SEC_CODE) != 0
4423 && bfd_link_pic (info)
4424 && htab->plt_type == PLT_UNSET)
4425 {
4426 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4427 the start of a function, which assembles to a REL32
4428 reference to .got2. If we detect one of these, then
4429 force the old PLT layout because the linker cannot
4430 reliably deduce the GOT pointer value needed for
4431 PLT call stubs. */
4432 asection *s;
4433 Elf_Internal_Sym *isym;
4434
4435 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4436 abfd, r_symndx);
4437 if (isym == NULL)
4438 return FALSE;
4439
4440 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4441 if (s == got2)
4442 {
4443 htab->plt_type = PLT_OLD;
4444 htab->old_bfd = abfd;
4445 }
4446 }
4447 if (h == NULL || h == htab->elf.hgot)
4448 break;
4449 /* fall through */
4450
4451 case R_PPC_ADDR32:
4452 case R_PPC_ADDR16:
4453 case R_PPC_ADDR16_LO:
4454 case R_PPC_ADDR16_HI:
4455 case R_PPC_ADDR16_HA:
4456 case R_PPC_UADDR32:
4457 case R_PPC_UADDR16:
4458 if (h != NULL && !bfd_link_pic (info))
4459 {
4460 /* We may need a plt entry if the symbol turns out to be
4461 a function defined in a dynamic object. */
4462 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4463 return FALSE;
4464
4465 /* We may need a copy reloc too. */
4466 h->non_got_ref = 1;
4467 h->pointer_equality_needed = 1;
4468 if (r_type == R_PPC_ADDR16_HA)
4469 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4470 if (r_type == R_PPC_ADDR16_LO)
4471 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4472 }
4473 goto dodyn;
4474
4475 case R_PPC_REL24:
4476 case R_PPC_REL14:
4477 case R_PPC_REL14_BRTAKEN:
4478 case R_PPC_REL14_BRNTAKEN:
4479 if (h == NULL)
4480 break;
4481 if (h == htab->elf.hgot)
4482 {
4483 if (htab->plt_type == PLT_UNSET)
4484 {
4485 htab->plt_type = PLT_OLD;
4486 htab->old_bfd = abfd;
4487 }
4488 break;
4489 }
4490 /* fall through */
4491
4492 case R_PPC_ADDR24:
4493 case R_PPC_ADDR14:
4494 case R_PPC_ADDR14_BRTAKEN:
4495 case R_PPC_ADDR14_BRNTAKEN:
4496 if (h != NULL && !bfd_link_pic (info))
4497 {
4498 /* We may need a plt entry if the symbol turns out to be
4499 a function defined in a dynamic object. */
4500 h->needs_plt = 1;
4501 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4502 return FALSE;
4503 break;
4504 }
4505
4506 dodyn:
4507 /* If we are creating a shared library, and this is a reloc
4508 against a global symbol, or a non PC relative reloc
4509 against a local symbol, then we need to copy the reloc
4510 into the shared library. However, if we are linking with
4511 -Bsymbolic, we do not need to copy a reloc against a
4512 global symbol which is defined in an object we are
4513 including in the link (i.e., DEF_REGULAR is set). At
4514 this point we have not seen all the input files, so it is
4515 possible that DEF_REGULAR is not set now but will be set
4516 later (it is never cleared). In case of a weak definition,
4517 DEF_REGULAR may be cleared later by a strong definition in
4518 a shared library. We account for that possibility below by
4519 storing information in the dyn_relocs field of the hash
4520 table entry. A similar situation occurs when creating
4521 shared libraries and symbol visibility changes render the
4522 symbol local.
4523
4524 If on the other hand, we are creating an executable, we
4525 may need to keep relocations for symbols satisfied by a
4526 dynamic library if we manage to avoid copy relocs for the
4527 symbol. */
4528 if ((bfd_link_pic (info)
4529 && (must_be_dyn_reloc (info, r_type)
4530 || (h != NULL
4531 && (!SYMBOLIC_BIND (info, h)
4532 || h->root.type == bfd_link_hash_defweak
4533 || !h->def_regular))))
4534 || (ELIMINATE_COPY_RELOCS
4535 && !bfd_link_pic (info)
4536 && h != NULL
4537 && (h->root.type == bfd_link_hash_defweak
4538 || !h->def_regular)))
4539 {
4540 #ifdef DEBUG
4541 fprintf (stderr,
4542 "ppc_elf_check_relocs needs to "
4543 "create relocation for %s\n",
4544 (h && h->root.root.string
4545 ? h->root.root.string : "<unknown>"));
4546 #endif
4547 if (sreloc == NULL)
4548 {
4549 if (htab->elf.dynobj == NULL)
4550 htab->elf.dynobj = abfd;
4551
4552 sreloc = _bfd_elf_make_dynamic_reloc_section
4553 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4554
4555 if (sreloc == NULL)
4556 return FALSE;
4557 }
4558
4559 /* If this is a global symbol, we count the number of
4560 relocations we need for this symbol. */
4561 if (h != NULL)
4562 {
4563 struct elf_dyn_relocs *p;
4564 struct elf_dyn_relocs **rel_head;
4565
4566 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4567 p = *rel_head;
4568 if (p == NULL || p->sec != sec)
4569 {
4570 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4571 if (p == NULL)
4572 return FALSE;
4573 p->next = *rel_head;
4574 *rel_head = p;
4575 p->sec = sec;
4576 p->count = 0;
4577 p->pc_count = 0;
4578 }
4579 p->count += 1;
4580 if (!must_be_dyn_reloc (info, r_type))
4581 p->pc_count += 1;
4582 }
4583 else
4584 {
4585 /* Track dynamic relocs needed for local syms too.
4586 We really need local syms available to do this
4587 easily. Oh well. */
4588 struct ppc_dyn_relocs *p;
4589 struct ppc_dyn_relocs **rel_head;
4590 bfd_boolean is_ifunc;
4591 asection *s;
4592 void *vpp;
4593 Elf_Internal_Sym *isym;
4594
4595 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4596 abfd, r_symndx);
4597 if (isym == NULL)
4598 return FALSE;
4599
4600 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4601 if (s == NULL)
4602 s = sec;
4603
4604 vpp = &elf_section_data (s)->local_dynrel;
4605 rel_head = (struct ppc_dyn_relocs **) vpp;
4606 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4607 p = *rel_head;
4608 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4609 p = p->next;
4610 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4611 {
4612 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4613 if (p == NULL)
4614 return FALSE;
4615 p->next = *rel_head;
4616 *rel_head = p;
4617 p->sec = sec;
4618 p->ifunc = is_ifunc;
4619 p->count = 0;
4620 }
4621 p->count += 1;
4622 }
4623 }
4624
4625 break;
4626 }
4627 }
4628
4629 return TRUE;
4630 }
4631 \f
4632 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4633 and OBFD, and merge non-conflicting ones. */
4634 void
4635 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4636 {
4637 bfd *obfd = info->output_bfd;
4638 obj_attribute *in_attr, *in_attrs;
4639 obj_attribute *out_attr, *out_attrs;
4640
4641 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4642 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4643
4644 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4645 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4646
4647 if (in_attr->i != out_attr->i)
4648 {
4649 int in_fp = in_attr->i & 3;
4650 int out_fp = out_attr->i & 3;
4651
4652 if (in_fp == 0)
4653 ;
4654 else if (out_fp == 0)
4655 {
4656 out_attr->type = 1;
4657 out_attr->i ^= in_fp;
4658 }
4659 else if (out_fp != 2 && in_fp == 2)
4660 _bfd_error_handler
4661 /* xgettext:c-format */
4662 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4663 else if (out_fp == 2 && in_fp != 2)
4664 _bfd_error_handler
4665 /* xgettext:c-format */
4666 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4667 else if (out_fp == 1 && in_fp == 3)
4668 _bfd_error_handler
4669 /* xgettext:c-format */
4670 (_("Warning: %B uses double-precision hard float, "
4671 "%B uses single-precision hard float"), obfd, ibfd);
4672 else if (out_fp == 3 && in_fp == 1)
4673 _bfd_error_handler
4674 /* xgettext:c-format */
4675 (_("Warning: %B uses double-precision hard float, "
4676 "%B uses single-precision hard float"), ibfd, obfd);
4677
4678 in_fp = in_attr->i & 0xc;
4679 out_fp = out_attr->i & 0xc;
4680 if (in_fp == 0)
4681 ;
4682 else if (out_fp == 0)
4683 {
4684 out_attr->type = 1;
4685 out_attr->i ^= in_fp;
4686 }
4687 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4688 _bfd_error_handler
4689 /* xgettext:c-format */
4690 (_("Warning: %B uses 64-bit long double, "
4691 "%B uses 128-bit long double"), ibfd, obfd);
4692 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4693 _bfd_error_handler
4694 /* xgettext:c-format */
4695 (_("Warning: %B uses 64-bit long double, "
4696 "%B uses 128-bit long double"), obfd, ibfd);
4697 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4698 _bfd_error_handler
4699 /* xgettext:c-format */
4700 (_("Warning: %B uses IBM long double, "
4701 "%B uses IEEE long double"), ibfd, obfd);
4702 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4703 _bfd_error_handler
4704 /* xgettext:c-format */
4705 (_("Warning: %B uses IBM long double, "
4706 "%B uses IEEE long double"), obfd, ibfd);
4707 }
4708 }
4709
4710 /* Merge object attributes from IBFD into OBFD. Warn if
4711 there are conflicting attributes. */
4712 static bfd_boolean
4713 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4714 {
4715 bfd *obfd;
4716 obj_attribute *in_attr, *in_attrs;
4717 obj_attribute *out_attr, *out_attrs;
4718
4719 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4720
4721 obfd = info->output_bfd;
4722 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4723 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4724
4725 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4726 merge non-conflicting ones. */
4727 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4728 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4729 if (in_attr->i != out_attr->i)
4730 {
4731 int in_vec = in_attr->i & 3;
4732 int out_vec = out_attr->i & 3;
4733
4734 if (in_vec == 0)
4735 ;
4736 else if (out_vec == 0)
4737 {
4738 out_attr->type = 1;
4739 out_attr->i = in_vec;
4740 }
4741 /* For now, allow generic to transition to AltiVec or SPE
4742 without a warning. If GCC marked files with their stack
4743 alignment and used don't-care markings for files which are
4744 not affected by the vector ABI, we could warn about this
4745 case too. */
4746 else if (in_vec == 1)
4747 ;
4748 else if (out_vec == 1)
4749 {
4750 out_attr->type = 1;
4751 out_attr->i = in_vec;
4752 }
4753 else if (out_vec < in_vec)
4754 _bfd_error_handler
4755 /* xgettext:c-format */
4756 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4757 obfd, ibfd);
4758 else if (out_vec > in_vec)
4759 _bfd_error_handler
4760 /* xgettext:c-format */
4761 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4762 ibfd, obfd);
4763 }
4764
4765 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4766 and merge non-conflicting ones. */
4767 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4768 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4769 if (in_attr->i != out_attr->i)
4770 {
4771 int in_struct = in_attr->i & 3;
4772 int out_struct = out_attr->i & 3;
4773
4774 if (in_struct == 0 || in_struct == 3)
4775 ;
4776 else if (out_struct == 0)
4777 {
4778 out_attr->type = 1;
4779 out_attr->i = in_struct;
4780 }
4781 else if (out_struct < in_struct)
4782 _bfd_error_handler
4783 /* xgettext:c-format */
4784 (_("Warning: %B uses r3/r4 for small structure returns, "
4785 "%B uses memory"), obfd, ibfd);
4786 else if (out_struct > in_struct)
4787 _bfd_error_handler
4788 /* xgettext:c-format */
4789 (_("Warning: %B uses r3/r4 for small structure returns, "
4790 "%B uses memory"), ibfd, obfd);
4791 }
4792
4793 /* Merge Tag_compatibility attributes and any common GNU ones. */
4794 _bfd_elf_merge_object_attributes (ibfd, info);
4795
4796 return TRUE;
4797 }
4798
4799 /* Merge backend specific data from an object file to the output
4800 object file when linking. */
4801
4802 static bfd_boolean
4803 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4804 {
4805 bfd *obfd = info->output_bfd;
4806 flagword old_flags;
4807 flagword new_flags;
4808 bfd_boolean error;
4809
4810 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4811 return TRUE;
4812
4813 /* Check if we have the same endianness. */
4814 if (! _bfd_generic_verify_endian_match (ibfd, info))
4815 return FALSE;
4816
4817 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4818 return FALSE;
4819
4820 new_flags = elf_elfheader (ibfd)->e_flags;
4821 old_flags = elf_elfheader (obfd)->e_flags;
4822 if (!elf_flags_init (obfd))
4823 {
4824 /* First call, no flags set. */
4825 elf_flags_init (obfd) = TRUE;
4826 elf_elfheader (obfd)->e_flags = new_flags;
4827 }
4828
4829 /* Compatible flags are ok. */
4830 else if (new_flags == old_flags)
4831 ;
4832
4833 /* Incompatible flags. */
4834 else
4835 {
4836 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4837 to be linked with either. */
4838 error = FALSE;
4839 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4840 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4841 {
4842 error = TRUE;
4843 _bfd_error_handler
4844 (_("%B: compiled with -mrelocatable and linked with "
4845 "modules compiled normally"), ibfd);
4846 }
4847 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4848 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4849 {
4850 error = TRUE;
4851 _bfd_error_handler
4852 (_("%B: compiled normally and linked with "
4853 "modules compiled with -mrelocatable"), ibfd);
4854 }
4855
4856 /* The output is -mrelocatable-lib iff both the input files are. */
4857 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4858 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4859
4860 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4861 but each input file is either -mrelocatable or -mrelocatable-lib. */
4862 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4863 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4864 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4865 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4866
4867 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4868 any module uses it. */
4869 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4870
4871 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4872 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4873
4874 /* Warn about any other mismatches. */
4875 if (new_flags != old_flags)
4876 {
4877 error = TRUE;
4878 _bfd_error_handler
4879 /* xgettext:c-format */
4880 (_("%B: uses different e_flags (0x%lx) fields "
4881 "than previous modules (0x%lx)"),
4882 ibfd, (long) new_flags, (long) old_flags);
4883 }
4884
4885 if (error)
4886 {
4887 bfd_set_error (bfd_error_bad_value);
4888 return FALSE;
4889 }
4890 }
4891
4892 return TRUE;
4893 }
4894
4895 static void
4896 ppc_elf_vle_split16 (bfd *input_bfd,
4897 asection *input_section,
4898 unsigned long offset,
4899 bfd_byte *loc,
4900 bfd_vma value,
4901 split16_format_type split16_format,
4902 bfd_boolean fixup)
4903 {
4904 unsigned int insn, opcode, top5;
4905
4906 insn = bfd_get_32 (input_bfd, loc);
4907 opcode = insn & 0xf300f800;
4908 if (opcode == E_OR2I_INSN
4909 || opcode == E_AND2I_DOT_INSN
4910 || opcode == E_OR2IS_INSN
4911 || opcode == E_LIS_INSN
4912 || opcode == E_AND2IS_DOT_INSN)
4913 {
4914 if (split16_format != split16a_type)
4915 {
4916 if (fixup)
4917 split16_format = split16a_type;
4918 else
4919 _bfd_error_handler
4920 /* xgettext:c-format */
4921 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4922 input_bfd, input_section, offset, opcode);
4923 }
4924 }
4925 else if (opcode == E_ADD2I_DOT_INSN
4926 || opcode == E_ADD2IS_INSN
4927 || opcode == E_CMP16I_INSN
4928 || opcode == E_MULL2I_INSN
4929 || opcode == E_CMPL16I_INSN
4930 || opcode == E_CMPH16I_INSN
4931 || opcode == E_CMPHL16I_INSN)
4932 {
4933 if (split16_format != split16d_type)
4934 {
4935 if (fixup)
4936 split16_format = split16d_type;
4937 else
4938 _bfd_error_handler
4939 /* xgettext:c-format */
4940 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4941 input_bfd, input_section, offset, opcode);
4942 }
4943 }
4944 top5 = value & 0xf800;
4945 top5 = top5 << (split16_format == split16a_type ? 5 : 9);
4946 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x1f007ff);
4947 insn |= top5;
4948 insn |= value & 0x7ff;
4949 bfd_put_32 (input_bfd, insn, loc);
4950 }
4951 \f
4952 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4953 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4954 int
4955 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4956 struct bfd_link_info *info)
4957 {
4958 struct ppc_elf_link_hash_table *htab;
4959 flagword flags;
4960
4961 htab = ppc_elf_hash_table (info);
4962
4963 if (htab->plt_type == PLT_UNSET)
4964 {
4965 struct elf_link_hash_entry *h;
4966
4967 if (htab->params->plt_style == PLT_OLD)
4968 htab->plt_type = PLT_OLD;
4969 else if (bfd_link_pic (info)
4970 && htab->elf.dynamic_sections_created
4971 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4972 FALSE, FALSE, TRUE)) != NULL
4973 && (h->type == STT_FUNC
4974 || h->needs_plt)
4975 && h->ref_regular
4976 && !(SYMBOL_CALLS_LOCAL (info, h)
4977 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4978 && h->root.type == bfd_link_hash_undefweak)))
4979 {
4980 /* Profiling of shared libs (and pies) is not supported with
4981 secure plt, because ppc32 does profiling before a
4982 function prologue and a secure plt pic call stubs needs
4983 r30 to be set up. */
4984 htab->plt_type = PLT_OLD;
4985 }
4986 else
4987 {
4988 bfd *ibfd;
4989 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4990
4991 /* Look through the reloc flags left by ppc_elf_check_relocs.
4992 Use the old style bss plt if a file makes plt calls
4993 without using the new relocs, and if ld isn't given
4994 --secure-plt and we never see REL16 relocs. */
4995 if (plt_type == PLT_UNSET)
4996 plt_type = PLT_OLD;
4997 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4998 if (is_ppc_elf (ibfd))
4999 {
5000 if (ppc_elf_tdata (ibfd)->has_rel16)
5001 plt_type = PLT_NEW;
5002 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5003 {
5004 plt_type = PLT_OLD;
5005 htab->old_bfd = ibfd;
5006 break;
5007 }
5008 }
5009 htab->plt_type = plt_type;
5010 }
5011 }
5012 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5013 {
5014 if (htab->old_bfd != NULL)
5015 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5016 htab->old_bfd);
5017 else
5018 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5019 }
5020
5021 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5022
5023 if (htab->plt_type == PLT_NEW)
5024 {
5025 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5026 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5027
5028 /* The new PLT is a loaded section. */
5029 if (htab->elf.splt != NULL
5030 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5031 return -1;
5032
5033 /* The new GOT is not executable. */
5034 if (htab->elf.sgot != NULL
5035 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5036 return -1;
5037 }
5038 else
5039 {
5040 /* Stop an unused .glink section from affecting .text alignment. */
5041 if (htab->glink != NULL
5042 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5043 return -1;
5044 }
5045 return htab->plt_type == PLT_NEW;
5046 }
5047 \f
5048 /* Return the section that should be marked against GC for a given
5049 relocation. */
5050
5051 static asection *
5052 ppc_elf_gc_mark_hook (asection *sec,
5053 struct bfd_link_info *info,
5054 Elf_Internal_Rela *rel,
5055 struct elf_link_hash_entry *h,
5056 Elf_Internal_Sym *sym)
5057 {
5058 if (h != NULL)
5059 switch (ELF32_R_TYPE (rel->r_info))
5060 {
5061 case R_PPC_GNU_VTINHERIT:
5062 case R_PPC_GNU_VTENTRY:
5063 return NULL;
5064 }
5065
5066 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5067 }
5068
5069 /* Update the got, plt and dynamic reloc reference counts for the
5070 section being removed. */
5071
5072 static bfd_boolean
5073 ppc_elf_gc_sweep_hook (bfd *abfd,
5074 struct bfd_link_info *info,
5075 asection *sec,
5076 const Elf_Internal_Rela *relocs)
5077 {
5078 struct ppc_elf_link_hash_table *htab;
5079 Elf_Internal_Shdr *symtab_hdr;
5080 struct elf_link_hash_entry **sym_hashes;
5081 bfd_signed_vma *local_got_refcounts;
5082 const Elf_Internal_Rela *rel, *relend;
5083 asection *got2;
5084
5085 if (bfd_link_relocatable (info))
5086 return TRUE;
5087
5088 if ((sec->flags & SEC_ALLOC) == 0)
5089 return TRUE;
5090
5091 elf_section_data (sec)->local_dynrel = NULL;
5092
5093 htab = ppc_elf_hash_table (info);
5094 symtab_hdr = &elf_symtab_hdr (abfd);
5095 sym_hashes = elf_sym_hashes (abfd);
5096 local_got_refcounts = elf_local_got_refcounts (abfd);
5097 got2 = bfd_get_section_by_name (abfd, ".got2");
5098
5099 relend = relocs + sec->reloc_count;
5100 for (rel = relocs; rel < relend; rel++)
5101 {
5102 unsigned long r_symndx;
5103 enum elf_ppc_reloc_type r_type;
5104 struct elf_link_hash_entry *h = NULL;
5105
5106 r_symndx = ELF32_R_SYM (rel->r_info);
5107 if (r_symndx >= symtab_hdr->sh_info)
5108 {
5109 struct elf_dyn_relocs **pp, *p;
5110 struct ppc_elf_link_hash_entry *eh;
5111
5112 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5113 while (h->root.type == bfd_link_hash_indirect
5114 || h->root.type == bfd_link_hash_warning)
5115 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5116 eh = (struct ppc_elf_link_hash_entry *) h;
5117
5118 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5119 if (p->sec == sec)
5120 {
5121 /* Everything must go for SEC. */
5122 *pp = p->next;
5123 break;
5124 }
5125 }
5126
5127 r_type = ELF32_R_TYPE (rel->r_info);
5128 if (!htab->is_vxworks
5129 && h == NULL
5130 && local_got_refcounts != NULL
5131 && (!bfd_link_pic (info)
5132 || is_branch_reloc (r_type)))
5133 {
5134 struct plt_entry **local_plt = (struct plt_entry **)
5135 (local_got_refcounts + symtab_hdr->sh_info);
5136 char *local_got_tls_masks = (char *)
5137 (local_plt + symtab_hdr->sh_info);
5138 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5139 {
5140 struct plt_entry **ifunc = local_plt + r_symndx;
5141 bfd_vma addend = 0;
5142 struct plt_entry *ent;
5143
5144 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5145 addend = rel->r_addend;
5146 ent = find_plt_ent (ifunc, got2, addend);
5147 if (ent->plt.refcount > 0)
5148 ent->plt.refcount -= 1;
5149 continue;
5150 }
5151 }
5152
5153 switch (r_type)
5154 {
5155 case R_PPC_GOT_TLSLD16:
5156 case R_PPC_GOT_TLSLD16_LO:
5157 case R_PPC_GOT_TLSLD16_HI:
5158 case R_PPC_GOT_TLSLD16_HA:
5159 case R_PPC_GOT_TLSGD16:
5160 case R_PPC_GOT_TLSGD16_LO:
5161 case R_PPC_GOT_TLSGD16_HI:
5162 case R_PPC_GOT_TLSGD16_HA:
5163 case R_PPC_GOT_TPREL16:
5164 case R_PPC_GOT_TPREL16_LO:
5165 case R_PPC_GOT_TPREL16_HI:
5166 case R_PPC_GOT_TPREL16_HA:
5167 case R_PPC_GOT_DTPREL16:
5168 case R_PPC_GOT_DTPREL16_LO:
5169 case R_PPC_GOT_DTPREL16_HI:
5170 case R_PPC_GOT_DTPREL16_HA:
5171 case R_PPC_GOT16:
5172 case R_PPC_GOT16_LO:
5173 case R_PPC_GOT16_HI:
5174 case R_PPC_GOT16_HA:
5175 if (h != NULL)
5176 {
5177 if (h->got.refcount > 0)
5178 h->got.refcount--;
5179 if (!bfd_link_pic (info))
5180 {
5181 struct plt_entry *ent;
5182
5183 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5184 if (ent != NULL && ent->plt.refcount > 0)
5185 ent->plt.refcount -= 1;
5186 }
5187 }
5188 else if (local_got_refcounts != NULL)
5189 {
5190 if (local_got_refcounts[r_symndx] > 0)
5191 local_got_refcounts[r_symndx]--;
5192 }
5193 break;
5194
5195 case R_PPC_REL24:
5196 case R_PPC_REL14:
5197 case R_PPC_REL14_BRTAKEN:
5198 case R_PPC_REL14_BRNTAKEN:
5199 case R_PPC_REL32:
5200 if (h == NULL || h == htab->elf.hgot)
5201 break;
5202 /* Fall through. */
5203
5204 case R_PPC_ADDR32:
5205 case R_PPC_ADDR24:
5206 case R_PPC_ADDR16:
5207 case R_PPC_ADDR16_LO:
5208 case R_PPC_ADDR16_HI:
5209 case R_PPC_ADDR16_HA:
5210 case R_PPC_ADDR14:
5211 case R_PPC_ADDR14_BRTAKEN:
5212 case R_PPC_ADDR14_BRNTAKEN:
5213 case R_PPC_UADDR32:
5214 case R_PPC_UADDR16:
5215 if (bfd_link_pic (info))
5216 break;
5217 /* Fall through. */
5218
5219 case R_PPC_PLT32:
5220 case R_PPC_PLTREL24:
5221 case R_PPC_PLTREL32:
5222 case R_PPC_PLT16_LO:
5223 case R_PPC_PLT16_HI:
5224 case R_PPC_PLT16_HA:
5225 if (h != NULL)
5226 {
5227 bfd_vma addend = 0;
5228 struct plt_entry *ent;
5229
5230 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5231 addend = rel->r_addend;
5232 ent = find_plt_ent (&h->plt.plist, got2, addend);
5233 if (ent != NULL && ent->plt.refcount > 0)
5234 ent->plt.refcount -= 1;
5235 }
5236 break;
5237
5238 default:
5239 break;
5240 }
5241 }
5242 return TRUE;
5243 }
5244 \f
5245 /* Set plt output section type, htab->tls_get_addr, and call the
5246 generic ELF tls_setup function. */
5247
5248 asection *
5249 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5250 {
5251 struct ppc_elf_link_hash_table *htab;
5252
5253 htab = ppc_elf_hash_table (info);
5254 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5255 FALSE, FALSE, TRUE);
5256 if (htab->plt_type != PLT_NEW)
5257 htab->params->no_tls_get_addr_opt = TRUE;
5258
5259 if (!htab->params->no_tls_get_addr_opt)
5260 {
5261 struct elf_link_hash_entry *opt, *tga;
5262 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5263 FALSE, FALSE, TRUE);
5264 if (opt != NULL
5265 && (opt->root.type == bfd_link_hash_defined
5266 || opt->root.type == bfd_link_hash_defweak))
5267 {
5268 /* If glibc supports an optimized __tls_get_addr call stub,
5269 signalled by the presence of __tls_get_addr_opt, and we'll
5270 be calling __tls_get_addr via a plt call stub, then
5271 make __tls_get_addr point to __tls_get_addr_opt. */
5272 tga = htab->tls_get_addr;
5273 if (htab->elf.dynamic_sections_created
5274 && tga != NULL
5275 && (tga->type == STT_FUNC
5276 || tga->needs_plt)
5277 && !(SYMBOL_CALLS_LOCAL (info, tga)
5278 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5279 && tga->root.type == bfd_link_hash_undefweak)))
5280 {
5281 struct plt_entry *ent;
5282 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5283 if (ent->plt.refcount > 0)
5284 break;
5285 if (ent != NULL)
5286 {
5287 tga->root.type = bfd_link_hash_indirect;
5288 tga->root.u.i.link = &opt->root;
5289 ppc_elf_copy_indirect_symbol (info, opt, tga);
5290 opt->forced_local = 0;
5291 if (opt->dynindx != -1)
5292 {
5293 /* Use __tls_get_addr_opt in dynamic relocations. */
5294 opt->dynindx = -1;
5295 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5296 opt->dynstr_index);
5297 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5298 return FALSE;
5299 }
5300 htab->tls_get_addr = opt;
5301 }
5302 }
5303 }
5304 else
5305 htab->params->no_tls_get_addr_opt = TRUE;
5306 }
5307 if (htab->plt_type == PLT_NEW
5308 && htab->elf.splt != NULL
5309 && htab->elf.splt->output_section != NULL)
5310 {
5311 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5312 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5313 }
5314
5315 return _bfd_elf_tls_setup (obfd, info);
5316 }
5317
5318 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5319 HASH. */
5320
5321 static bfd_boolean
5322 branch_reloc_hash_match (const bfd *ibfd,
5323 const Elf_Internal_Rela *rel,
5324 const struct elf_link_hash_entry *hash)
5325 {
5326 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5327 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5328 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5329
5330 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5331 {
5332 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5333 struct elf_link_hash_entry *h;
5334
5335 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5336 while (h->root.type == bfd_link_hash_indirect
5337 || h->root.type == bfd_link_hash_warning)
5338 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5339 if (h == hash)
5340 return TRUE;
5341 }
5342 return FALSE;
5343 }
5344
5345 /* Run through all the TLS relocs looking for optimization
5346 opportunities. */
5347
5348 bfd_boolean
5349 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5350 struct bfd_link_info *info)
5351 {
5352 bfd *ibfd;
5353 asection *sec;
5354 struct ppc_elf_link_hash_table *htab;
5355 int pass;
5356
5357 if (!bfd_link_executable (info))
5358 return TRUE;
5359
5360 htab = ppc_elf_hash_table (info);
5361 if (htab == NULL)
5362 return FALSE;
5363
5364 /* Make two passes through the relocs. First time check that tls
5365 relocs involved in setting up a tls_get_addr call are indeed
5366 followed by such a call. If they are not, don't do any tls
5367 optimization. On the second pass twiddle tls_mask flags to
5368 notify relocate_section that optimization can be done, and
5369 adjust got and plt refcounts. */
5370 for (pass = 0; pass < 2; ++pass)
5371 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5372 {
5373 Elf_Internal_Sym *locsyms = NULL;
5374 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5375 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5376
5377 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5378 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5379 {
5380 Elf_Internal_Rela *relstart, *rel, *relend;
5381 int expecting_tls_get_addr = 0;
5382
5383 /* Read the relocations. */
5384 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5385 info->keep_memory);
5386 if (relstart == NULL)
5387 return FALSE;
5388
5389 relend = relstart + sec->reloc_count;
5390 for (rel = relstart; rel < relend; rel++)
5391 {
5392 enum elf_ppc_reloc_type r_type;
5393 unsigned long r_symndx;
5394 struct elf_link_hash_entry *h = NULL;
5395 char *tls_mask;
5396 char tls_set, tls_clear;
5397 bfd_boolean is_local;
5398 bfd_signed_vma *got_count;
5399
5400 r_symndx = ELF32_R_SYM (rel->r_info);
5401 if (r_symndx >= symtab_hdr->sh_info)
5402 {
5403 struct elf_link_hash_entry **sym_hashes;
5404
5405 sym_hashes = elf_sym_hashes (ibfd);
5406 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5407 while (h->root.type == bfd_link_hash_indirect
5408 || h->root.type == bfd_link_hash_warning)
5409 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5410 }
5411
5412 is_local = FALSE;
5413 if (h == NULL
5414 || !h->def_dynamic)
5415 is_local = TRUE;
5416
5417 r_type = ELF32_R_TYPE (rel->r_info);
5418 /* If this section has old-style __tls_get_addr calls
5419 without marker relocs, then check that each
5420 __tls_get_addr call reloc is preceded by a reloc
5421 that conceivably belongs to the __tls_get_addr arg
5422 setup insn. If we don't find matching arg setup
5423 relocs, don't do any tls optimization. */
5424 if (pass == 0
5425 && sec->has_tls_get_addr_call
5426 && h != NULL
5427 && h == htab->tls_get_addr
5428 && !expecting_tls_get_addr
5429 && is_branch_reloc (r_type))
5430 {
5431 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5432 "TLS optimization disabled\n",
5433 ibfd, sec, rel->r_offset);
5434 if (elf_section_data (sec)->relocs != relstart)
5435 free (relstart);
5436 return TRUE;
5437 }
5438
5439 expecting_tls_get_addr = 0;
5440 switch (r_type)
5441 {
5442 case R_PPC_GOT_TLSLD16:
5443 case R_PPC_GOT_TLSLD16_LO:
5444 expecting_tls_get_addr = 1;
5445 /* Fall through. */
5446
5447 case R_PPC_GOT_TLSLD16_HI:
5448 case R_PPC_GOT_TLSLD16_HA:
5449 /* These relocs should never be against a symbol
5450 defined in a shared lib. Leave them alone if
5451 that turns out to be the case. */
5452 if (!is_local)
5453 continue;
5454
5455 /* LD -> LE */
5456 tls_set = 0;
5457 tls_clear = TLS_LD;
5458 break;
5459
5460 case R_PPC_GOT_TLSGD16:
5461 case R_PPC_GOT_TLSGD16_LO:
5462 expecting_tls_get_addr = 1;
5463 /* Fall through. */
5464
5465 case R_PPC_GOT_TLSGD16_HI:
5466 case R_PPC_GOT_TLSGD16_HA:
5467 if (is_local)
5468 /* GD -> LE */
5469 tls_set = 0;
5470 else
5471 /* GD -> IE */
5472 tls_set = TLS_TLS | TLS_TPRELGD;
5473 tls_clear = TLS_GD;
5474 break;
5475
5476 case R_PPC_GOT_TPREL16:
5477 case R_PPC_GOT_TPREL16_LO:
5478 case R_PPC_GOT_TPREL16_HI:
5479 case R_PPC_GOT_TPREL16_HA:
5480 if (is_local)
5481 {
5482 /* IE -> LE */
5483 tls_set = 0;
5484 tls_clear = TLS_TPREL;
5485 break;
5486 }
5487 else
5488 continue;
5489
5490 case R_PPC_TLSGD:
5491 case R_PPC_TLSLD:
5492 expecting_tls_get_addr = 2;
5493 tls_set = 0;
5494 tls_clear = 0;
5495 break;
5496
5497 default:
5498 continue;
5499 }
5500
5501 if (pass == 0)
5502 {
5503 if (!expecting_tls_get_addr
5504 || (expecting_tls_get_addr == 1
5505 && !sec->has_tls_get_addr_call))
5506 continue;
5507
5508 if (rel + 1 < relend
5509 && branch_reloc_hash_match (ibfd, rel + 1,
5510 htab->tls_get_addr))
5511 continue;
5512
5513 /* Uh oh, we didn't find the expected call. We
5514 could just mark this symbol to exclude it
5515 from tls optimization but it's safer to skip
5516 the entire optimization. */
5517 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5518 "TLS optimization disabled\n"),
5519 ibfd, sec, rel->r_offset);
5520 if (elf_section_data (sec)->relocs != relstart)
5521 free (relstart);
5522 return TRUE;
5523 }
5524
5525 if (expecting_tls_get_addr)
5526 {
5527 struct plt_entry *ent;
5528 bfd_vma addend = 0;
5529
5530 if (bfd_link_pic (info)
5531 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5532 addend = rel[1].r_addend;
5533 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5534 got2, addend);
5535 if (ent != NULL && ent->plt.refcount > 0)
5536 ent->plt.refcount -= 1;
5537
5538 if (expecting_tls_get_addr == 2)
5539 continue;
5540 }
5541
5542 if (h != NULL)
5543 {
5544 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5545 got_count = &h->got.refcount;
5546 }
5547 else
5548 {
5549 bfd_signed_vma *lgot_refs;
5550 struct plt_entry **local_plt;
5551 char *lgot_masks;
5552
5553 if (locsyms == NULL)
5554 {
5555 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5556 if (locsyms == NULL)
5557 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5558 symtab_hdr->sh_info,
5559 0, NULL, NULL, NULL);
5560 if (locsyms == NULL)
5561 {
5562 if (elf_section_data (sec)->relocs != relstart)
5563 free (relstart);
5564 return FALSE;
5565 }
5566 }
5567 lgot_refs = elf_local_got_refcounts (ibfd);
5568 if (lgot_refs == NULL)
5569 abort ();
5570 local_plt = (struct plt_entry **)
5571 (lgot_refs + symtab_hdr->sh_info);
5572 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5573 tls_mask = &lgot_masks[r_symndx];
5574 got_count = &lgot_refs[r_symndx];
5575 }
5576
5577 if (tls_set == 0)
5578 {
5579 /* We managed to get rid of a got entry. */
5580 if (*got_count > 0)
5581 *got_count -= 1;
5582 }
5583
5584 *tls_mask |= tls_set;
5585 *tls_mask &= ~tls_clear;
5586 }
5587
5588 if (elf_section_data (sec)->relocs != relstart)
5589 free (relstart);
5590 }
5591
5592 if (locsyms != NULL
5593 && (symtab_hdr->contents != (unsigned char *) locsyms))
5594 {
5595 if (!info->keep_memory)
5596 free (locsyms);
5597 else
5598 symtab_hdr->contents = (unsigned char *) locsyms;
5599 }
5600 }
5601 return TRUE;
5602 }
5603 \f
5604 /* Return true if we have dynamic relocs that apply to read-only sections. */
5605
5606 static bfd_boolean
5607 readonly_dynrelocs (struct elf_link_hash_entry *h)
5608 {
5609 struct elf_dyn_relocs *p;
5610
5611 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5612 {
5613 asection *s = p->sec->output_section;
5614
5615 if (s != NULL
5616 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5617 == (SEC_READONLY | SEC_ALLOC)))
5618 return TRUE;
5619 }
5620 return FALSE;
5621 }
5622
5623 /* Adjust a symbol defined by a dynamic object and referenced by a
5624 regular object. The current definition is in some section of the
5625 dynamic object, but we're not including those sections. We have to
5626 change the definition to something the rest of the link can
5627 understand. */
5628
5629 static bfd_boolean
5630 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5631 struct elf_link_hash_entry *h)
5632 {
5633 struct ppc_elf_link_hash_table *htab;
5634 asection *s;
5635
5636 #ifdef DEBUG
5637 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5638 h->root.root.string);
5639 #endif
5640
5641 /* Make sure we know what is going on here. */
5642 htab = ppc_elf_hash_table (info);
5643 BFD_ASSERT (htab->elf.dynobj != NULL
5644 && (h->needs_plt
5645 || h->type == STT_GNU_IFUNC
5646 || h->u.weakdef != NULL
5647 || (h->def_dynamic
5648 && h->ref_regular
5649 && !h->def_regular)));
5650
5651 /* Deal with function syms. */
5652 if (h->type == STT_FUNC
5653 || h->type == STT_GNU_IFUNC
5654 || h->needs_plt)
5655 {
5656 /* Clear procedure linkage table information for any symbol that
5657 won't need a .plt entry. */
5658 struct plt_entry *ent;
5659 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5660 if (ent->plt.refcount > 0)
5661 break;
5662 if (ent == NULL
5663 || (h->type != STT_GNU_IFUNC
5664 && (SYMBOL_CALLS_LOCAL (info, h)
5665 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5666 && h->root.type == bfd_link_hash_undefweak))))
5667 {
5668 /* A PLT entry is not required/allowed when:
5669
5670 1. We are not using ld.so; because then the PLT entry
5671 can't be set up, so we can't use one. In this case,
5672 ppc_elf_adjust_dynamic_symbol won't even be called.
5673
5674 2. GC has rendered the entry unused.
5675
5676 3. We know for certain that a call to this symbol
5677 will go to this object, or will remain undefined. */
5678 h->plt.plist = NULL;
5679 h->needs_plt = 0;
5680 h->pointer_equality_needed = 0;
5681 }
5682 else
5683 {
5684 /* Taking a function's address in a read/write section
5685 doesn't require us to define the function symbol in the
5686 executable on a plt call stub. A dynamic reloc can
5687 be used instead. */
5688 if (h->pointer_equality_needed
5689 && h->type != STT_GNU_IFUNC
5690 && !htab->is_vxworks
5691 && !ppc_elf_hash_entry (h)->has_sda_refs
5692 && !readonly_dynrelocs (h))
5693 {
5694 h->pointer_equality_needed = 0;
5695 h->non_got_ref = 0;
5696 }
5697
5698 /* After adjust_dynamic_symbol, non_got_ref set in the
5699 non-shared case means that we have allocated space in
5700 .dynbss for the symbol and thus dyn_relocs for this
5701 symbol should be discarded.
5702 If we get here we know we are making a PLT entry for this
5703 symbol, and in an executable we'd normally resolve
5704 relocations against this symbol to the PLT entry. Allow
5705 dynamic relocs if the reference is weak, and the dynamic
5706 relocs will not cause text relocation. */
5707 else if (!h->ref_regular_nonweak
5708 && h->non_got_ref
5709 && h->type != STT_GNU_IFUNC
5710 && !htab->is_vxworks
5711 && !ppc_elf_hash_entry (h)->has_sda_refs
5712 && !readonly_dynrelocs (h))
5713 h->non_got_ref = 0;
5714 }
5715 h->protected_def = 0;
5716 return TRUE;
5717 }
5718 else
5719 h->plt.plist = NULL;
5720
5721 /* If this is a weak symbol, and there is a real definition, the
5722 processor independent code will have arranged for us to see the
5723 real definition first, and we can just use the same value. */
5724 if (h->u.weakdef != NULL)
5725 {
5726 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5727 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5728 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5729 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5730 if (ELIMINATE_COPY_RELOCS)
5731 h->non_got_ref = h->u.weakdef->non_got_ref;
5732 return TRUE;
5733 }
5734
5735 /* This is a reference to a symbol defined by a dynamic object which
5736 is not a function. */
5737
5738 /* If we are creating a shared library, we must presume that the
5739 only references to the symbol are via the global offset table.
5740 For such cases we need not do anything here; the relocations will
5741 be handled correctly by relocate_section. */
5742 if (bfd_link_pic (info))
5743 {
5744 h->protected_def = 0;
5745 return TRUE;
5746 }
5747
5748 /* If there are no references to this symbol that do not use the
5749 GOT, we don't need to generate a copy reloc. */
5750 if (!h->non_got_ref)
5751 {
5752 h->protected_def = 0;
5753 return TRUE;
5754 }
5755
5756 /* Protected variables do not work with .dynbss. The copy in
5757 .dynbss won't be used by the shared library with the protected
5758 definition for the variable. Editing to PIC, or text relocations
5759 are preferable to an incorrect program. */
5760 if (h->protected_def)
5761 {
5762 if (ELIMINATE_COPY_RELOCS
5763 && ppc_elf_hash_entry (h)->has_addr16_ha
5764 && ppc_elf_hash_entry (h)->has_addr16_lo
5765 && htab->params->pic_fixup == 0
5766 && info->disable_target_specific_optimizations <= 1)
5767 htab->params->pic_fixup = 1;
5768 h->non_got_ref = 0;
5769 return TRUE;
5770 }
5771
5772 /* If -z nocopyreloc was given, we won't generate them either. */
5773 if (info->nocopyreloc)
5774 {
5775 h->non_got_ref = 0;
5776 return TRUE;
5777 }
5778
5779 /* If we didn't find any dynamic relocs in read-only sections, then
5780 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5781 We can't do this if there are any small data relocations. This
5782 doesn't work on VxWorks, where we can not have dynamic
5783 relocations (other than copy and jump slot relocations) in an
5784 executable. */
5785 if (ELIMINATE_COPY_RELOCS
5786 && !ppc_elf_hash_entry (h)->has_sda_refs
5787 && !htab->is_vxworks
5788 && !h->def_regular
5789 && !readonly_dynrelocs (h))
5790 {
5791 h->non_got_ref = 0;
5792 return TRUE;
5793 }
5794
5795 /* We must allocate the symbol in our .dynbss section, which will
5796 become part of the .bss section of the executable. There will be
5797 an entry for this symbol in the .dynsym section. The dynamic
5798 object will contain position independent code, so all references
5799 from the dynamic object to this symbol will go through the global
5800 offset table. The dynamic linker will use the .dynsym entry to
5801 determine the address it must put in the global offset table, so
5802 both the dynamic object and the regular object will refer to the
5803 same memory location for the variable.
5804
5805 Of course, if the symbol is referenced using SDAREL relocs, we
5806 must instead allocate it in .sbss. */
5807
5808 if (ppc_elf_hash_entry (h)->has_sda_refs)
5809 s = htab->dynsbss;
5810 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5811 s = htab->elf.sdynrelro;
5812 else
5813 s = htab->elf.sdynbss;
5814 BFD_ASSERT (s != NULL);
5815
5816 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5817 copy the initial value out of the dynamic object and into the
5818 runtime process image. We need to remember the offset into the
5819 .rela.bss section we are going to use. */
5820 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5821 {
5822 asection *srel;
5823
5824 if (ppc_elf_hash_entry (h)->has_sda_refs)
5825 srel = htab->relsbss;
5826 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5827 srel = htab->elf.sreldynrelro;
5828 else
5829 srel = htab->elf.srelbss;
5830 BFD_ASSERT (srel != NULL);
5831 srel->size += sizeof (Elf32_External_Rela);
5832 h->needs_copy = 1;
5833 }
5834
5835 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5836 }
5837 \f
5838 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5839 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5840 specifying the addend on the plt relocation. For -fpic code, the sym
5841 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5842 xxxxxxxx.got2.plt_pic32.<callee>. */
5843
5844 static bfd_boolean
5845 add_stub_sym (struct plt_entry *ent,
5846 struct elf_link_hash_entry *h,
5847 struct bfd_link_info *info)
5848 {
5849 struct elf_link_hash_entry *sh;
5850 size_t len1, len2, len3;
5851 char *name;
5852 const char *stub;
5853 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5854
5855 if (bfd_link_pic (info))
5856 stub = ".plt_pic32.";
5857 else
5858 stub = ".plt_call32.";
5859
5860 len1 = strlen (h->root.root.string);
5861 len2 = strlen (stub);
5862 len3 = 0;
5863 if (ent->sec)
5864 len3 = strlen (ent->sec->name);
5865 name = bfd_malloc (len1 + len2 + len3 + 9);
5866 if (name == NULL)
5867 return FALSE;
5868 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5869 if (ent->sec)
5870 memcpy (name + 8, ent->sec->name, len3);
5871 memcpy (name + 8 + len3, stub, len2);
5872 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5873 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5874 if (sh == NULL)
5875 return FALSE;
5876 if (sh->root.type == bfd_link_hash_new)
5877 {
5878 sh->root.type = bfd_link_hash_defined;
5879 sh->root.u.def.section = htab->glink;
5880 sh->root.u.def.value = ent->glink_offset;
5881 sh->ref_regular = 1;
5882 sh->def_regular = 1;
5883 sh->ref_regular_nonweak = 1;
5884 sh->forced_local = 1;
5885 sh->non_elf = 0;
5886 sh->root.linker_def = 1;
5887 }
5888 return TRUE;
5889 }
5890
5891 /* Allocate NEED contiguous space in .got, and return the offset.
5892 Handles allocation of the got header when crossing 32k. */
5893
5894 static bfd_vma
5895 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5896 {
5897 bfd_vma where;
5898 unsigned int max_before_header;
5899
5900 if (htab->plt_type == PLT_VXWORKS)
5901 {
5902 where = htab->elf.sgot->size;
5903 htab->elf.sgot->size += need;
5904 }
5905 else
5906 {
5907 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5908 if (need <= htab->got_gap)
5909 {
5910 where = max_before_header - htab->got_gap;
5911 htab->got_gap -= need;
5912 }
5913 else
5914 {
5915 if (htab->elf.sgot->size + need > max_before_header
5916 && htab->elf.sgot->size <= max_before_header)
5917 {
5918 htab->got_gap = max_before_header - htab->elf.sgot->size;
5919 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5920 }
5921 where = htab->elf.sgot->size;
5922 htab->elf.sgot->size += need;
5923 }
5924 }
5925 return where;
5926 }
5927
5928 /* Allocate space in associated reloc sections for dynamic relocs. */
5929
5930 static bfd_boolean
5931 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5932 {
5933 struct bfd_link_info *info = inf;
5934 struct ppc_elf_link_hash_entry *eh;
5935 struct ppc_elf_link_hash_table *htab;
5936 struct elf_dyn_relocs *p;
5937
5938 if (h->root.type == bfd_link_hash_indirect)
5939 return TRUE;
5940
5941 htab = ppc_elf_hash_table (info);
5942 if (htab->elf.dynamic_sections_created
5943 || h->type == STT_GNU_IFUNC)
5944 {
5945 struct plt_entry *ent;
5946 bfd_boolean doneone = FALSE;
5947 bfd_vma plt_offset = 0, glink_offset = 0;
5948 bfd_boolean dyn;
5949
5950 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5951 if (ent->plt.refcount > 0)
5952 {
5953 /* Make sure this symbol is output as a dynamic symbol. */
5954 if (h->dynindx == -1
5955 && !h->forced_local
5956 && !h->def_regular
5957 && htab->elf.dynamic_sections_created)
5958 {
5959 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5960 return FALSE;
5961 }
5962
5963 dyn = htab->elf.dynamic_sections_created;
5964 if (bfd_link_pic (info)
5965 || h->type == STT_GNU_IFUNC
5966 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5967 {
5968 asection *s = htab->elf.splt;
5969 if (!dyn || h->dynindx == -1)
5970 s = htab->elf.iplt;
5971
5972 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5973 {
5974 if (!doneone)
5975 {
5976 plt_offset = s->size;
5977 s->size += 4;
5978 }
5979 ent->plt.offset = plt_offset;
5980
5981 s = htab->glink;
5982 if (!doneone || bfd_link_pic (info))
5983 {
5984 glink_offset = s->size;
5985 s->size += GLINK_ENTRY_SIZE;
5986 if (h == htab->tls_get_addr
5987 && !htab->params->no_tls_get_addr_opt)
5988 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5989 }
5990 if (!doneone
5991 && !bfd_link_pic (info)
5992 && h->def_dynamic
5993 && !h->def_regular)
5994 {
5995 h->root.u.def.section = s;
5996 h->root.u.def.value = glink_offset;
5997 }
5998 ent->glink_offset = glink_offset;
5999
6000 if (htab->params->emit_stub_syms
6001 && !add_stub_sym (ent, h, info))
6002 return FALSE;
6003 }
6004 else
6005 {
6006 if (!doneone)
6007 {
6008 /* If this is the first .plt entry, make room
6009 for the special first entry. */
6010 if (s->size == 0)
6011 s->size += htab->plt_initial_entry_size;
6012
6013 /* The PowerPC PLT is actually composed of two
6014 parts, the first part is 2 words (for a load
6015 and a jump), and then there is a remaining
6016 word available at the end. */
6017 plt_offset = (htab->plt_initial_entry_size
6018 + (htab->plt_slot_size
6019 * ((s->size
6020 - htab->plt_initial_entry_size)
6021 / htab->plt_entry_size)));
6022
6023 /* If this symbol is not defined in a regular
6024 file, and we are not generating a shared
6025 library, then set the symbol to this location
6026 in the .plt. This is to avoid text
6027 relocations, and is required to make
6028 function pointers compare as equal between
6029 the normal executable and the shared library. */
6030 if (! bfd_link_pic (info)
6031 && h->def_dynamic
6032 && !h->def_regular)
6033 {
6034 h->root.u.def.section = s;
6035 h->root.u.def.value = plt_offset;
6036 }
6037
6038 /* Make room for this entry. */
6039 s->size += htab->plt_entry_size;
6040 /* After the 8192nd entry, room for two entries
6041 is allocated. */
6042 if (htab->plt_type == PLT_OLD
6043 && (s->size - htab->plt_initial_entry_size)
6044 / htab->plt_entry_size
6045 > PLT_NUM_SINGLE_ENTRIES)
6046 s->size += htab->plt_entry_size;
6047 }
6048 ent->plt.offset = plt_offset;
6049 }
6050
6051 /* We also need to make an entry in the .rela.plt section. */
6052 if (!doneone)
6053 {
6054 if (!htab->elf.dynamic_sections_created
6055 || h->dynindx == -1)
6056 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6057 else
6058 {
6059 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6060
6061 if (htab->plt_type == PLT_VXWORKS)
6062 {
6063 /* Allocate space for the unloaded relocations. */
6064 if (!bfd_link_pic (info)
6065 && htab->elf.dynamic_sections_created)
6066 {
6067 if (ent->plt.offset
6068 == (bfd_vma) htab->plt_initial_entry_size)
6069 {
6070 htab->srelplt2->size
6071 += (sizeof (Elf32_External_Rela)
6072 * VXWORKS_PLTRESOLVE_RELOCS);
6073 }
6074
6075 htab->srelplt2->size
6076 += (sizeof (Elf32_External_Rela)
6077 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6078 }
6079
6080 /* Every PLT entry has an associated GOT entry in
6081 .got.plt. */
6082 htab->elf.sgotplt->size += 4;
6083 }
6084 }
6085 doneone = TRUE;
6086 }
6087 }
6088 else
6089 ent->plt.offset = (bfd_vma) -1;
6090 }
6091 else
6092 ent->plt.offset = (bfd_vma) -1;
6093
6094 if (!doneone)
6095 {
6096 h->plt.plist = NULL;
6097 h->needs_plt = 0;
6098 }
6099 }
6100 else
6101 {
6102 h->plt.plist = NULL;
6103 h->needs_plt = 0;
6104 }
6105
6106 eh = (struct ppc_elf_link_hash_entry *) h;
6107 if (eh->elf.got.refcount > 0
6108 || (ELIMINATE_COPY_RELOCS
6109 && !eh->elf.def_regular
6110 && eh->elf.protected_def
6111 && eh->has_addr16_ha
6112 && eh->has_addr16_lo
6113 && htab->params->pic_fixup > 0))
6114 {
6115 bfd_boolean dyn;
6116 unsigned int need;
6117
6118 /* Make sure this symbol is output as a dynamic symbol. */
6119 if (eh->elf.dynindx == -1
6120 && !eh->elf.forced_local
6121 && eh->elf.type != STT_GNU_IFUNC
6122 && htab->elf.dynamic_sections_created)
6123 {
6124 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6125 return FALSE;
6126 }
6127
6128 need = 0;
6129 if ((eh->tls_mask & TLS_TLS) != 0)
6130 {
6131 if ((eh->tls_mask & TLS_LD) != 0)
6132 {
6133 if (!eh->elf.def_dynamic)
6134 /* We'll just use htab->tlsld_got.offset. This should
6135 always be the case. It's a little odd if we have
6136 a local dynamic reloc against a non-local symbol. */
6137 htab->tlsld_got.refcount += 1;
6138 else
6139 need += 8;
6140 }
6141 if ((eh->tls_mask & TLS_GD) != 0)
6142 need += 8;
6143 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6144 need += 4;
6145 if ((eh->tls_mask & TLS_DTPREL) != 0)
6146 need += 4;
6147 }
6148 else
6149 need += 4;
6150 if (need == 0)
6151 eh->elf.got.offset = (bfd_vma) -1;
6152 else
6153 {
6154 eh->elf.got.offset = allocate_got (htab, need);
6155 dyn = htab->elf.dynamic_sections_created;
6156 if ((bfd_link_pic (info)
6157 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6158 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6159 || eh->elf.root.type != bfd_link_hash_undefweak))
6160 {
6161 asection *rsec = htab->elf.srelgot;
6162
6163 if (eh->elf.type == STT_GNU_IFUNC)
6164 rsec = htab->elf.irelplt;
6165 /* All the entries we allocated need relocs.
6166 Except LD only needs one. */
6167 if ((eh->tls_mask & TLS_LD) != 0
6168 && eh->elf.def_dynamic)
6169 need -= 4;
6170 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6171 }
6172 }
6173 }
6174 else
6175 eh->elf.got.offset = (bfd_vma) -1;
6176
6177 if (eh->dyn_relocs == NULL
6178 || !htab->elf.dynamic_sections_created)
6179 return TRUE;
6180
6181 /* In the shared -Bsymbolic case, discard space allocated for
6182 dynamic pc-relative relocs against symbols which turn out to be
6183 defined in regular objects. For the normal shared case, discard
6184 space for relocs that have become local due to symbol visibility
6185 changes. */
6186
6187 if (bfd_link_pic (info))
6188 {
6189 /* Relocs that use pc_count are those that appear on a call insn,
6190 or certain REL relocs (see must_be_dyn_reloc) that can be
6191 generated via assembly. We want calls to protected symbols to
6192 resolve directly to the function rather than going via the plt.
6193 If people want function pointer comparisons to work as expected
6194 then they should avoid writing weird assembly. */
6195 if (SYMBOL_CALLS_LOCAL (info, h))
6196 {
6197 struct elf_dyn_relocs **pp;
6198
6199 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6200 {
6201 p->count -= p->pc_count;
6202 p->pc_count = 0;
6203 if (p->count == 0)
6204 *pp = p->next;
6205 else
6206 pp = &p->next;
6207 }
6208 }
6209
6210 if (htab->is_vxworks)
6211 {
6212 struct elf_dyn_relocs **pp;
6213
6214 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6215 {
6216 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6217 *pp = p->next;
6218 else
6219 pp = &p->next;
6220 }
6221 }
6222
6223 /* Discard relocs on undefined symbols that must be local. */
6224 if (eh->dyn_relocs != NULL
6225 && h->root.type == bfd_link_hash_undefined
6226 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6227 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6228 eh->dyn_relocs = NULL;
6229
6230 /* Also discard relocs on undefined weak syms with non-default
6231 visibility. */
6232 if (eh->dyn_relocs != NULL
6233 && h->root.type == bfd_link_hash_undefweak)
6234 {
6235 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6236 eh->dyn_relocs = NULL;
6237
6238 /* Make sure undefined weak symbols are output as a dynamic
6239 symbol in PIEs. */
6240 else if (h->dynindx == -1
6241 && !h->forced_local
6242 && !h->def_regular)
6243 {
6244 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6245 return FALSE;
6246 }
6247 }
6248 }
6249 else if (ELIMINATE_COPY_RELOCS)
6250 {
6251 /* For the non-shared case, discard space for relocs against
6252 symbols which turn out to need copy relocs or are not
6253 dynamic. */
6254
6255 if (!h->non_got_ref
6256 && !h->def_regular
6257 && !(h->protected_def
6258 && eh->has_addr16_ha
6259 && eh->has_addr16_lo
6260 && htab->params->pic_fixup > 0))
6261 {
6262 /* Make sure this symbol is output as a dynamic symbol.
6263 Undefined weak syms won't yet be marked as dynamic. */
6264 if (h->dynindx == -1
6265 && !h->forced_local)
6266 {
6267 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6268 return FALSE;
6269 }
6270
6271 /* If that succeeded, we know we'll be keeping all the
6272 relocs. */
6273 if (h->dynindx != -1)
6274 goto keep;
6275 }
6276
6277 eh->dyn_relocs = NULL;
6278
6279 keep: ;
6280 }
6281
6282 /* Finally, allocate space. */
6283 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6284 {
6285 asection *sreloc = elf_section_data (p->sec)->sreloc;
6286 if (eh->elf.type == STT_GNU_IFUNC)
6287 sreloc = htab->elf.irelplt;
6288 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6289 }
6290
6291 return TRUE;
6292 }
6293
6294 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6295 read-only sections. */
6296
6297 static bfd_boolean
6298 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6299 {
6300 if (h->root.type == bfd_link_hash_indirect)
6301 return TRUE;
6302
6303 if (readonly_dynrelocs (h))
6304 {
6305 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6306
6307 /* Not an error, just cut short the traversal. */
6308 return FALSE;
6309 }
6310 return TRUE;
6311 }
6312
6313 static const unsigned char glink_eh_frame_cie[] =
6314 {
6315 0, 0, 0, 16, /* length. */
6316 0, 0, 0, 0, /* id. */
6317 1, /* CIE version. */
6318 'z', 'R', 0, /* Augmentation string. */
6319 4, /* Code alignment. */
6320 0x7c, /* Data alignment. */
6321 65, /* RA reg. */
6322 1, /* Augmentation size. */
6323 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6324 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6325 };
6326
6327 /* Set the sizes of the dynamic sections. */
6328
6329 static bfd_boolean
6330 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6331 struct bfd_link_info *info)
6332 {
6333 struct ppc_elf_link_hash_table *htab;
6334 asection *s;
6335 bfd_boolean relocs;
6336 bfd *ibfd;
6337
6338 #ifdef DEBUG
6339 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6340 #endif
6341
6342 htab = ppc_elf_hash_table (info);
6343 BFD_ASSERT (htab->elf.dynobj != NULL);
6344
6345 if (elf_hash_table (info)->dynamic_sections_created)
6346 {
6347 /* Set the contents of the .interp section to the interpreter. */
6348 if (bfd_link_executable (info) && !info->nointerp)
6349 {
6350 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6351 BFD_ASSERT (s != NULL);
6352 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6353 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6354 }
6355 }
6356
6357 if (htab->plt_type == PLT_OLD)
6358 htab->got_header_size = 16;
6359 else if (htab->plt_type == PLT_NEW)
6360 htab->got_header_size = 12;
6361
6362 /* Set up .got offsets for local syms, and space for local dynamic
6363 relocs. */
6364 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6365 {
6366 bfd_signed_vma *local_got;
6367 bfd_signed_vma *end_local_got;
6368 struct plt_entry **local_plt;
6369 struct plt_entry **end_local_plt;
6370 char *lgot_masks;
6371 bfd_size_type locsymcount;
6372 Elf_Internal_Shdr *symtab_hdr;
6373
6374 if (!is_ppc_elf (ibfd))
6375 continue;
6376
6377 for (s = ibfd->sections; s != NULL; s = s->next)
6378 {
6379 struct ppc_dyn_relocs *p;
6380
6381 for (p = ((struct ppc_dyn_relocs *)
6382 elf_section_data (s)->local_dynrel);
6383 p != NULL;
6384 p = p->next)
6385 {
6386 if (!bfd_is_abs_section (p->sec)
6387 && bfd_is_abs_section (p->sec->output_section))
6388 {
6389 /* Input section has been discarded, either because
6390 it is a copy of a linkonce section or due to
6391 linker script /DISCARD/, so we'll be discarding
6392 the relocs too. */
6393 }
6394 else if (htab->is_vxworks
6395 && strcmp (p->sec->output_section->name,
6396 ".tls_vars") == 0)
6397 {
6398 /* Relocations in vxworks .tls_vars sections are
6399 handled specially by the loader. */
6400 }
6401 else if (p->count != 0)
6402 {
6403 asection *sreloc = elf_section_data (p->sec)->sreloc;
6404 if (p->ifunc)
6405 sreloc = htab->elf.irelplt;
6406 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6407 if ((p->sec->output_section->flags
6408 & (SEC_READONLY | SEC_ALLOC))
6409 == (SEC_READONLY | SEC_ALLOC))
6410 info->flags |= DF_TEXTREL;
6411 }
6412 }
6413 }
6414
6415 local_got = elf_local_got_refcounts (ibfd);
6416 if (!local_got)
6417 continue;
6418
6419 symtab_hdr = &elf_symtab_hdr (ibfd);
6420 locsymcount = symtab_hdr->sh_info;
6421 end_local_got = local_got + locsymcount;
6422 local_plt = (struct plt_entry **) end_local_got;
6423 end_local_plt = local_plt + locsymcount;
6424 lgot_masks = (char *) end_local_plt;
6425
6426 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6427 if (*local_got > 0)
6428 {
6429 unsigned int need = 0;
6430 if ((*lgot_masks & TLS_TLS) != 0)
6431 {
6432 if ((*lgot_masks & TLS_GD) != 0)
6433 need += 8;
6434 if ((*lgot_masks & TLS_LD) != 0)
6435 htab->tlsld_got.refcount += 1;
6436 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6437 need += 4;
6438 if ((*lgot_masks & TLS_DTPREL) != 0)
6439 need += 4;
6440 }
6441 else
6442 need += 4;
6443 if (need == 0)
6444 *local_got = (bfd_vma) -1;
6445 else
6446 {
6447 *local_got = allocate_got (htab, need);
6448 if (bfd_link_pic (info))
6449 {
6450 asection *srel = htab->elf.srelgot;
6451 if ((*lgot_masks & PLT_IFUNC) != 0)
6452 srel = htab->elf.irelplt;
6453 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6454 }
6455 }
6456 }
6457 else
6458 *local_got = (bfd_vma) -1;
6459
6460 if (htab->is_vxworks)
6461 continue;
6462
6463 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6464 for (; local_plt < end_local_plt; ++local_plt)
6465 {
6466 struct plt_entry *ent;
6467 bfd_boolean doneone = FALSE;
6468 bfd_vma plt_offset = 0, glink_offset = 0;
6469
6470 for (ent = *local_plt; ent != NULL; ent = ent->next)
6471 if (ent->plt.refcount > 0)
6472 {
6473 s = htab->elf.iplt;
6474
6475 if (!doneone)
6476 {
6477 plt_offset = s->size;
6478 s->size += 4;
6479 }
6480 ent->plt.offset = plt_offset;
6481
6482 s = htab->glink;
6483 if (!doneone || bfd_link_pic (info))
6484 {
6485 glink_offset = s->size;
6486 s->size += GLINK_ENTRY_SIZE;
6487 }
6488 ent->glink_offset = glink_offset;
6489
6490 if (!doneone)
6491 {
6492 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6493 doneone = TRUE;
6494 }
6495 }
6496 else
6497 ent->plt.offset = (bfd_vma) -1;
6498 }
6499 }
6500
6501 /* Allocate space for global sym dynamic relocs. */
6502 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6503
6504 if (htab->tlsld_got.refcount > 0)
6505 {
6506 htab->tlsld_got.offset = allocate_got (htab, 8);
6507 if (bfd_link_pic (info))
6508 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6509 }
6510 else
6511 htab->tlsld_got.offset = (bfd_vma) -1;
6512
6513 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6514 {
6515 unsigned int g_o_t = 32768;
6516
6517 /* If we haven't allocated the header, do so now. When we get here,
6518 for old plt/got the got size will be 0 to 32764 (not allocated),
6519 or 32780 to 65536 (header allocated). For new plt/got, the
6520 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6521 if (htab->elf.sgot->size <= 32768)
6522 {
6523 g_o_t = htab->elf.sgot->size;
6524 if (htab->plt_type == PLT_OLD)
6525 g_o_t += 4;
6526 htab->elf.sgot->size += htab->got_header_size;
6527 }
6528
6529 htab->elf.hgot->root.u.def.value = g_o_t;
6530 }
6531 if (bfd_link_pic (info))
6532 {
6533 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6534
6535 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6536 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6537 }
6538 if (info->emitrelocations)
6539 {
6540 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6541
6542 if (sda != NULL && sda->ref_regular)
6543 sda->root.u.def.section->flags |= SEC_KEEP;
6544 sda = htab->sdata[1].sym;
6545 if (sda != NULL && sda->ref_regular)
6546 sda->root.u.def.section->flags |= SEC_KEEP;
6547 }
6548
6549 if (htab->glink != NULL
6550 && htab->glink->size != 0
6551 && htab->elf.dynamic_sections_created)
6552 {
6553 htab->glink_pltresolve = htab->glink->size;
6554 /* Space for the branch table. ??? We don't need entries for
6555 non-dynamic symbols in this table. This case can arise with
6556 static ifuncs or forced local ifuncs. */
6557 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6558 /* Pad out to align the start of PLTresolve. */
6559 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6560 ? 63 : 15);
6561 htab->glink->size += GLINK_PLTRESOLVE;
6562
6563 if (htab->params->emit_stub_syms)
6564 {
6565 struct elf_link_hash_entry *sh;
6566 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6567 TRUE, FALSE, FALSE);
6568 if (sh == NULL)
6569 return FALSE;
6570 if (sh->root.type == bfd_link_hash_new)
6571 {
6572 sh->root.type = bfd_link_hash_defined;
6573 sh->root.u.def.section = htab->glink;
6574 sh->root.u.def.value = htab->glink_pltresolve;
6575 sh->ref_regular = 1;
6576 sh->def_regular = 1;
6577 sh->ref_regular_nonweak = 1;
6578 sh->forced_local = 1;
6579 sh->non_elf = 0;
6580 sh->root.linker_def = 1;
6581 }
6582 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6583 TRUE, FALSE, FALSE);
6584 if (sh == NULL)
6585 return FALSE;
6586 if (sh->root.type == bfd_link_hash_new)
6587 {
6588 sh->root.type = bfd_link_hash_defined;
6589 sh->root.u.def.section = htab->glink;
6590 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6591 sh->ref_regular = 1;
6592 sh->def_regular = 1;
6593 sh->ref_regular_nonweak = 1;
6594 sh->forced_local = 1;
6595 sh->non_elf = 0;
6596 sh->root.linker_def = 1;
6597 }
6598 }
6599 }
6600
6601 if (htab->glink != NULL
6602 && htab->glink->size != 0
6603 && htab->glink_eh_frame != NULL
6604 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6605 && _bfd_elf_eh_frame_present (info))
6606 {
6607 s = htab->glink_eh_frame;
6608 s->size = sizeof (glink_eh_frame_cie) + 20;
6609 if (bfd_link_pic (info))
6610 {
6611 s->size += 4;
6612 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6613 s->size += 4;
6614 }
6615 }
6616
6617 /* We've now determined the sizes of the various dynamic sections.
6618 Allocate memory for them. */
6619 relocs = FALSE;
6620 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6621 {
6622 bfd_boolean strip_section = TRUE;
6623
6624 if ((s->flags & SEC_LINKER_CREATED) == 0)
6625 continue;
6626
6627 if (s == htab->elf.splt
6628 || s == htab->elf.sgot)
6629 {
6630 /* We'd like to strip these sections if they aren't needed, but if
6631 we've exported dynamic symbols from them we must leave them.
6632 It's too late to tell BFD to get rid of the symbols. */
6633 if (htab->elf.hplt != NULL)
6634 strip_section = FALSE;
6635 /* Strip this section if we don't need it; see the
6636 comment below. */
6637 }
6638 else if (s == htab->elf.iplt
6639 || s == htab->glink
6640 || s == htab->glink_eh_frame
6641 || s == htab->elf.sgotplt
6642 || s == htab->sbss
6643 || s == htab->elf.sdynbss
6644 || s == htab->elf.sdynrelro
6645 || s == htab->dynsbss)
6646 {
6647 /* Strip these too. */
6648 }
6649 else if (s == htab->sdata[0].section
6650 || s == htab->sdata[1].section)
6651 {
6652 strip_section = (s->flags & SEC_KEEP) == 0;
6653 }
6654 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6655 ".rela"))
6656 {
6657 if (s->size != 0)
6658 {
6659 /* Remember whether there are any relocation sections. */
6660 relocs = TRUE;
6661
6662 /* We use the reloc_count field as a counter if we need
6663 to copy relocs into the output file. */
6664 s->reloc_count = 0;
6665 }
6666 }
6667 else
6668 {
6669 /* It's not one of our sections, so don't allocate space. */
6670 continue;
6671 }
6672
6673 if (s->size == 0 && strip_section)
6674 {
6675 /* If we don't need this section, strip it from the
6676 output file. This is mostly to handle .rela.bss and
6677 .rela.plt. We must create both sections in
6678 create_dynamic_sections, because they must be created
6679 before the linker maps input sections to output
6680 sections. The linker does that before
6681 adjust_dynamic_symbol is called, and it is that
6682 function which decides whether anything needs to go
6683 into these sections. */
6684 s->flags |= SEC_EXCLUDE;
6685 continue;
6686 }
6687
6688 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6689 continue;
6690
6691 /* Allocate memory for the section contents. */
6692 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6693 if (s->contents == NULL)
6694 return FALSE;
6695 }
6696
6697 if (htab->elf.dynamic_sections_created)
6698 {
6699 /* Add some entries to the .dynamic section. We fill in the
6700 values later, in ppc_elf_finish_dynamic_sections, but we
6701 must add the entries now so that we get the correct size for
6702 the .dynamic section. The DT_DEBUG entry is filled in by the
6703 dynamic linker and used by the debugger. */
6704 #define add_dynamic_entry(TAG, VAL) \
6705 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6706
6707 if (bfd_link_executable (info))
6708 {
6709 if (!add_dynamic_entry (DT_DEBUG, 0))
6710 return FALSE;
6711 }
6712
6713 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6714 {
6715 if (!add_dynamic_entry (DT_PLTGOT, 0)
6716 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6717 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6718 || !add_dynamic_entry (DT_JMPREL, 0))
6719 return FALSE;
6720 }
6721
6722 if (htab->plt_type == PLT_NEW
6723 && htab->glink != NULL
6724 && htab->glink->size != 0)
6725 {
6726 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6727 return FALSE;
6728 if (!htab->params->no_tls_get_addr_opt
6729 && htab->tls_get_addr != NULL
6730 && htab->tls_get_addr->plt.plist != NULL
6731 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6732 return FALSE;
6733 }
6734
6735 if (relocs)
6736 {
6737 if (!add_dynamic_entry (DT_RELA, 0)
6738 || !add_dynamic_entry (DT_RELASZ, 0)
6739 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6740 return FALSE;
6741 }
6742
6743 /* If any dynamic relocs apply to a read-only section, then we
6744 need a DT_TEXTREL entry. */
6745 if ((info->flags & DF_TEXTREL) == 0)
6746 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6747 info);
6748
6749 if ((info->flags & DF_TEXTREL) != 0)
6750 {
6751 if (!add_dynamic_entry (DT_TEXTREL, 0))
6752 return FALSE;
6753 }
6754 if (htab->is_vxworks
6755 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6756 return FALSE;
6757 }
6758 #undef add_dynamic_entry
6759
6760 if (htab->glink_eh_frame != NULL
6761 && htab->glink_eh_frame->contents != NULL)
6762 {
6763 unsigned char *p = htab->glink_eh_frame->contents;
6764 bfd_vma val;
6765
6766 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6767 /* CIE length (rewrite in case little-endian). */
6768 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6769 p += sizeof (glink_eh_frame_cie);
6770 /* FDE length. */
6771 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6772 bfd_put_32 (htab->elf.dynobj, val, p);
6773 p += 4;
6774 /* CIE pointer. */
6775 val = p - htab->glink_eh_frame->contents;
6776 bfd_put_32 (htab->elf.dynobj, val, p);
6777 p += 4;
6778 /* Offset to .glink. Set later. */
6779 p += 4;
6780 /* .glink size. */
6781 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6782 p += 4;
6783 /* Augmentation. */
6784 p += 1;
6785
6786 if (bfd_link_pic (info)
6787 && htab->elf.dynamic_sections_created)
6788 {
6789 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6790 if (adv < 64)
6791 *p++ = DW_CFA_advance_loc + adv;
6792 else if (adv < 256)
6793 {
6794 *p++ = DW_CFA_advance_loc1;
6795 *p++ = adv;
6796 }
6797 else if (adv < 65536)
6798 {
6799 *p++ = DW_CFA_advance_loc2;
6800 bfd_put_16 (htab->elf.dynobj, adv, p);
6801 p += 2;
6802 }
6803 else
6804 {
6805 *p++ = DW_CFA_advance_loc4;
6806 bfd_put_32 (htab->elf.dynobj, adv, p);
6807 p += 4;
6808 }
6809 *p++ = DW_CFA_register;
6810 *p++ = 65;
6811 p++;
6812 *p++ = DW_CFA_advance_loc + 4;
6813 *p++ = DW_CFA_restore_extended;
6814 *p++ = 65;
6815 }
6816 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6817 == htab->glink_eh_frame->size);
6818 }
6819
6820 return TRUE;
6821 }
6822
6823 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6824 if it looks like nothing is using them. */
6825
6826 static void
6827 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6828 {
6829 struct elf_link_hash_entry *sda = lsect->sym;
6830
6831 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6832 {
6833 asection *s;
6834
6835 s = bfd_get_section_by_name (output_bfd, lsect->name);
6836 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6837 {
6838 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6839 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6840 {
6841 sda->def_regular = 0;
6842 /* This is somewhat magic. See elf_link_output_extsym. */
6843 sda->ref_dynamic = 1;
6844 sda->forced_local = 0;
6845 }
6846 }
6847 }
6848 }
6849
6850 void
6851 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6852 {
6853 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6854
6855 if (htab != NULL)
6856 {
6857 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6858 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6859 }
6860 }
6861
6862
6863 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6864
6865 static bfd_boolean
6866 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6867 {
6868 if (h->plt.plist != NULL
6869 && !h->def_regular
6870 && (!h->pointer_equality_needed
6871 || !h->ref_regular_nonweak))
6872 return FALSE;
6873
6874 return _bfd_elf_hash_symbol (h);
6875 }
6876 \f
6877 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6878
6879 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6880 used for some functions that are allowed to break the ABI). */
6881 static const int shared_stub_entry[] =
6882 {
6883 0x7c0802a6, /* mflr 0 */
6884 0x429f0005, /* bcl 20, 31, .Lxxx */
6885 0x7d8802a6, /* mflr 12 */
6886 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6887 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6888 0x7c0803a6, /* mtlr 0 */
6889 0x7d8903a6, /* mtctr 12 */
6890 0x4e800420, /* bctr */
6891 };
6892
6893 static const int stub_entry[] =
6894 {
6895 0x3d800000, /* lis 12,xxx@ha */
6896 0x398c0000, /* addi 12,12,xxx@l */
6897 0x7d8903a6, /* mtctr 12 */
6898 0x4e800420, /* bctr */
6899 };
6900
6901 struct ppc_elf_relax_info
6902 {
6903 unsigned int workaround_size;
6904 unsigned int picfixup_size;
6905 };
6906
6907 /* This function implements long branch trampolines, and the ppc476
6908 icache bug workaround. Any section needing trampolines or patch
6909 space for the workaround has its size extended so that we can
6910 add trampolines at the end of the section. */
6911
6912 static bfd_boolean
6913 ppc_elf_relax_section (bfd *abfd,
6914 asection *isec,
6915 struct bfd_link_info *link_info,
6916 bfd_boolean *again)
6917 {
6918 struct one_branch_fixup
6919 {
6920 struct one_branch_fixup *next;
6921 asection *tsec;
6922 /* Final link, can use the symbol offset. For a
6923 relocatable link we use the symbol's index. */
6924 bfd_vma toff;
6925 bfd_vma trampoff;
6926 };
6927
6928 Elf_Internal_Shdr *symtab_hdr;
6929 bfd_byte *contents = NULL;
6930 Elf_Internal_Sym *isymbuf = NULL;
6931 Elf_Internal_Rela *internal_relocs = NULL;
6932 Elf_Internal_Rela *irel, *irelend = NULL;
6933 struct one_branch_fixup *branch_fixups = NULL;
6934 struct ppc_elf_relax_info *relax_info = NULL;
6935 unsigned changes = 0;
6936 bfd_boolean workaround_change;
6937 struct ppc_elf_link_hash_table *htab;
6938 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6939 asection *got2;
6940 bfd_boolean maybe_pasted;
6941
6942 *again = FALSE;
6943
6944 /* No need to do anything with non-alloc or non-code sections. */
6945 if ((isec->flags & SEC_ALLOC) == 0
6946 || (isec->flags & SEC_CODE) == 0
6947 || (isec->flags & SEC_LINKER_CREATED) != 0
6948 || isec->size < 4)
6949 return TRUE;
6950
6951 /* We cannot represent the required PIC relocs in the output, so don't
6952 do anything. The linker doesn't support mixing -shared and -r
6953 anyway. */
6954 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6955 return TRUE;
6956
6957 htab = ppc_elf_hash_table (link_info);
6958 if (htab == NULL)
6959 return TRUE;
6960
6961 isec->size = (isec->size + 3) & -4;
6962 if (isec->rawsize == 0)
6963 isec->rawsize = isec->size;
6964 trampbase = isec->size;
6965
6966 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6967 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6968 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6969
6970 if (htab->params->ppc476_workaround
6971 || htab->params->pic_fixup > 0)
6972 {
6973 if (elf_section_data (isec)->sec_info == NULL)
6974 {
6975 elf_section_data (isec)->sec_info
6976 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6977 if (elf_section_data (isec)->sec_info == NULL)
6978 return FALSE;
6979 }
6980 relax_info = elf_section_data (isec)->sec_info;
6981 trampbase -= relax_info->workaround_size;
6982 }
6983
6984 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6985 || strcmp (isec->output_section->name, ".fini") == 0);
6986 /* Space for a branch around any trampolines. */
6987 trampoff = trampbase;
6988 if (maybe_pasted && trampbase == isec->rawsize)
6989 trampoff += 4;
6990
6991 symtab_hdr = &elf_symtab_hdr (abfd);
6992 picfixup_size = 0;
6993 if (htab->params->branch_trampolines
6994 || htab->params->pic_fixup > 0)
6995 {
6996 /* Get a copy of the native relocations. */
6997 if (isec->reloc_count != 0)
6998 {
6999 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7000 link_info->keep_memory);
7001 if (internal_relocs == NULL)
7002 goto error_return;
7003 }
7004
7005 got2 = bfd_get_section_by_name (abfd, ".got2");
7006
7007 irelend = internal_relocs + isec->reloc_count;
7008 for (irel = internal_relocs; irel < irelend; irel++)
7009 {
7010 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7011 bfd_vma toff, roff;
7012 asection *tsec;
7013 struct one_branch_fixup *f;
7014 size_t insn_offset = 0;
7015 bfd_vma max_branch_offset = 0, val;
7016 bfd_byte *hit_addr;
7017 unsigned long t0;
7018 struct elf_link_hash_entry *h;
7019 struct plt_entry **plist;
7020 unsigned char sym_type;
7021
7022 switch (r_type)
7023 {
7024 case R_PPC_REL24:
7025 case R_PPC_LOCAL24PC:
7026 case R_PPC_PLTREL24:
7027 max_branch_offset = 1 << 25;
7028 break;
7029
7030 case R_PPC_REL14:
7031 case R_PPC_REL14_BRTAKEN:
7032 case R_PPC_REL14_BRNTAKEN:
7033 max_branch_offset = 1 << 15;
7034 break;
7035
7036 case R_PPC_ADDR16_HA:
7037 if (htab->params->pic_fixup > 0)
7038 break;
7039 continue;
7040
7041 default:
7042 continue;
7043 }
7044
7045 /* Get the value of the symbol referred to by the reloc. */
7046 h = NULL;
7047 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7048 {
7049 /* A local symbol. */
7050 Elf_Internal_Sym *isym;
7051
7052 /* Read this BFD's local symbols. */
7053 if (isymbuf == NULL)
7054 {
7055 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7056 if (isymbuf == NULL)
7057 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7058 symtab_hdr->sh_info, 0,
7059 NULL, NULL, NULL);
7060 if (isymbuf == 0)
7061 goto error_return;
7062 }
7063 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7064 if (isym->st_shndx == SHN_UNDEF)
7065 tsec = bfd_und_section_ptr;
7066 else if (isym->st_shndx == SHN_ABS)
7067 tsec = bfd_abs_section_ptr;
7068 else if (isym->st_shndx == SHN_COMMON)
7069 tsec = bfd_com_section_ptr;
7070 else
7071 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7072
7073 toff = isym->st_value;
7074 sym_type = ELF_ST_TYPE (isym->st_info);
7075 }
7076 else
7077 {
7078 /* Global symbol handling. */
7079 unsigned long indx;
7080
7081 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7082 h = elf_sym_hashes (abfd)[indx];
7083
7084 while (h->root.type == bfd_link_hash_indirect
7085 || h->root.type == bfd_link_hash_warning)
7086 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7087
7088 if (h->root.type == bfd_link_hash_defined
7089 || h->root.type == bfd_link_hash_defweak)
7090 {
7091 tsec = h->root.u.def.section;
7092 toff = h->root.u.def.value;
7093 }
7094 else if (h->root.type == bfd_link_hash_undefined
7095 || h->root.type == bfd_link_hash_undefweak)
7096 {
7097 tsec = bfd_und_section_ptr;
7098 toff = bfd_link_relocatable (link_info) ? indx : 0;
7099 }
7100 else
7101 continue;
7102
7103 /* If this branch is to __tls_get_addr then we may later
7104 optimise away the call. We won't be needing a long-
7105 branch stub in that case. */
7106 if (bfd_link_executable (link_info)
7107 && h == htab->tls_get_addr
7108 && irel != internal_relocs)
7109 {
7110 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7111 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7112 unsigned int tls_mask = 0;
7113
7114 /* The previous reloc should be one of R_PPC_TLSGD or
7115 R_PPC_TLSLD, or for older object files, a reloc
7116 on the __tls_get_addr arg setup insn. Get tls
7117 mask bits from the symbol on that reloc. */
7118 if (t_symndx < symtab_hdr->sh_info)
7119 {
7120 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7121
7122 if (local_got_offsets != NULL)
7123 {
7124 struct plt_entry **local_plt = (struct plt_entry **)
7125 (local_got_offsets + symtab_hdr->sh_info);
7126 char *lgot_masks = (char *)
7127 (local_plt + symtab_hdr->sh_info);
7128 tls_mask = lgot_masks[t_symndx];
7129 }
7130 }
7131 else
7132 {
7133 struct elf_link_hash_entry *th
7134 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7135
7136 while (th->root.type == bfd_link_hash_indirect
7137 || th->root.type == bfd_link_hash_warning)
7138 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7139
7140 tls_mask
7141 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7142 }
7143
7144 /* The mask bits tell us if the call will be
7145 optimised away. */
7146 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7147 && (t_rtype == R_PPC_TLSGD
7148 || t_rtype == R_PPC_GOT_TLSGD16
7149 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7150 continue;
7151 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7152 && (t_rtype == R_PPC_TLSLD
7153 || t_rtype == R_PPC_GOT_TLSLD16
7154 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7155 continue;
7156 }
7157
7158 sym_type = h->type;
7159 }
7160
7161 if (r_type == R_PPC_ADDR16_HA)
7162 {
7163 if (h != NULL
7164 && !h->def_regular
7165 && h->protected_def
7166 && ppc_elf_hash_entry (h)->has_addr16_ha
7167 && ppc_elf_hash_entry (h)->has_addr16_lo)
7168 picfixup_size += 12;
7169 continue;
7170 }
7171
7172 /* The condition here under which we call find_plt_ent must
7173 match that in relocate_section. If we call find_plt_ent here
7174 but not in relocate_section, or vice versa, then the branch
7175 destination used here may be incorrect. */
7176 plist = NULL;
7177 if (h != NULL)
7178 {
7179 /* We know is_branch_reloc (r_type) is true. */
7180 if (h->type == STT_GNU_IFUNC
7181 || r_type == R_PPC_PLTREL24)
7182 plist = &h->plt.plist;
7183 }
7184 else if (sym_type == STT_GNU_IFUNC
7185 && elf_local_got_offsets (abfd) != NULL)
7186 {
7187 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7188 struct plt_entry **local_plt = (struct plt_entry **)
7189 (local_got_offsets + symtab_hdr->sh_info);
7190 plist = local_plt + ELF32_R_SYM (irel->r_info);
7191 }
7192 if (plist != NULL)
7193 {
7194 bfd_vma addend = 0;
7195 struct plt_entry *ent;
7196
7197 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7198 addend = irel->r_addend;
7199 ent = find_plt_ent (plist, got2, addend);
7200 if (ent != NULL)
7201 {
7202 if (htab->plt_type == PLT_NEW
7203 || h == NULL
7204 || !htab->elf.dynamic_sections_created
7205 || h->dynindx == -1)
7206 {
7207 tsec = htab->glink;
7208 toff = ent->glink_offset;
7209 }
7210 else
7211 {
7212 tsec = htab->elf.splt;
7213 toff = ent->plt.offset;
7214 }
7215 }
7216 }
7217
7218 /* If the branch and target are in the same section, you have
7219 no hope of adding stubs. We'll error out later should the
7220 branch overflow. */
7221 if (tsec == isec)
7222 continue;
7223
7224 /* There probably isn't any reason to handle symbols in
7225 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7226 attribute for a code section, and we are only looking at
7227 branches. However, implement it correctly here as a
7228 reference for other target relax_section functions. */
7229 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7230 {
7231 /* At this stage in linking, no SEC_MERGE symbol has been
7232 adjusted, so all references to such symbols need to be
7233 passed through _bfd_merged_section_offset. (Later, in
7234 relocate_section, all SEC_MERGE symbols *except* for
7235 section symbols have been adjusted.)
7236
7237 gas may reduce relocations against symbols in SEC_MERGE
7238 sections to a relocation against the section symbol when
7239 the original addend was zero. When the reloc is against
7240 a section symbol we should include the addend in the
7241 offset passed to _bfd_merged_section_offset, since the
7242 location of interest is the original symbol. On the
7243 other hand, an access to "sym+addend" where "sym" is not
7244 a section symbol should not include the addend; Such an
7245 access is presumed to be an offset from "sym"; The
7246 location of interest is just "sym". */
7247 if (sym_type == STT_SECTION)
7248 toff += irel->r_addend;
7249
7250 toff
7251 = _bfd_merged_section_offset (abfd, &tsec,
7252 elf_section_data (tsec)->sec_info,
7253 toff);
7254
7255 if (sym_type != STT_SECTION)
7256 toff += irel->r_addend;
7257 }
7258 /* PLTREL24 addends are special. */
7259 else if (r_type != R_PPC_PLTREL24)
7260 toff += irel->r_addend;
7261
7262 /* Attempted -shared link of non-pic code loses. */
7263 if ((!bfd_link_relocatable (link_info)
7264 && tsec == bfd_und_section_ptr)
7265 || tsec->output_section == NULL
7266 || (tsec->owner != NULL
7267 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7268 continue;
7269
7270 roff = irel->r_offset;
7271
7272 /* If the branch is in range, no need to do anything. */
7273 if (tsec != bfd_und_section_ptr
7274 && (!bfd_link_relocatable (link_info)
7275 /* A relocatable link may have sections moved during
7276 final link, so do not presume they remain in range. */
7277 || tsec->output_section == isec->output_section))
7278 {
7279 bfd_vma symaddr, reladdr;
7280
7281 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7282 reladdr = isec->output_section->vma + isec->output_offset + roff;
7283 if (symaddr - reladdr + max_branch_offset
7284 < 2 * max_branch_offset)
7285 continue;
7286 }
7287
7288 /* Look for an existing fixup to this address. */
7289 for (f = branch_fixups; f ; f = f->next)
7290 if (f->tsec == tsec && f->toff == toff)
7291 break;
7292
7293 if (f == NULL)
7294 {
7295 size_t size;
7296 unsigned long stub_rtype;
7297
7298 val = trampoff - roff;
7299 if (val >= max_branch_offset)
7300 /* Oh dear, we can't reach a trampoline. Don't try to add
7301 one. We'll report an error later. */
7302 continue;
7303
7304 if (bfd_link_pic (link_info))
7305 {
7306 size = 4 * ARRAY_SIZE (shared_stub_entry);
7307 insn_offset = 12;
7308 }
7309 else
7310 {
7311 size = 4 * ARRAY_SIZE (stub_entry);
7312 insn_offset = 0;
7313 }
7314 stub_rtype = R_PPC_RELAX;
7315 if (tsec == htab->elf.splt
7316 || tsec == htab->glink)
7317 {
7318 stub_rtype = R_PPC_RELAX_PLT;
7319 if (r_type == R_PPC_PLTREL24)
7320 stub_rtype = R_PPC_RELAX_PLTREL24;
7321 }
7322
7323 /* Hijack the old relocation. Since we need two
7324 relocations for this use a "composite" reloc. */
7325 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7326 stub_rtype);
7327 irel->r_offset = trampoff + insn_offset;
7328 if (r_type == R_PPC_PLTREL24
7329 && stub_rtype != R_PPC_RELAX_PLTREL24)
7330 irel->r_addend = 0;
7331
7332 /* Record the fixup so we don't do it again this section. */
7333 f = bfd_malloc (sizeof (*f));
7334 f->next = branch_fixups;
7335 f->tsec = tsec;
7336 f->toff = toff;
7337 f->trampoff = trampoff;
7338 branch_fixups = f;
7339
7340 trampoff += size;
7341 changes++;
7342 }
7343 else
7344 {
7345 val = f->trampoff - roff;
7346 if (val >= max_branch_offset)
7347 continue;
7348
7349 /* Nop out the reloc, since we're finalizing things here. */
7350 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7351 }
7352
7353 /* Get the section contents. */
7354 if (contents == NULL)
7355 {
7356 /* Get cached copy if it exists. */
7357 if (elf_section_data (isec)->this_hdr.contents != NULL)
7358 contents = elf_section_data (isec)->this_hdr.contents;
7359 /* Go get them off disk. */
7360 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7361 goto error_return;
7362 }
7363
7364 /* Fix up the existing branch to hit the trampoline. */
7365 hit_addr = contents + roff;
7366 switch (r_type)
7367 {
7368 case R_PPC_REL24:
7369 case R_PPC_LOCAL24PC:
7370 case R_PPC_PLTREL24:
7371 t0 = bfd_get_32 (abfd, hit_addr);
7372 t0 &= ~0x3fffffc;
7373 t0 |= val & 0x3fffffc;
7374 bfd_put_32 (abfd, t0, hit_addr);
7375 break;
7376
7377 case R_PPC_REL14:
7378 case R_PPC_REL14_BRTAKEN:
7379 case R_PPC_REL14_BRNTAKEN:
7380 t0 = bfd_get_32 (abfd, hit_addr);
7381 t0 &= ~0xfffc;
7382 t0 |= val & 0xfffc;
7383 bfd_put_32 (abfd, t0, hit_addr);
7384 break;
7385 }
7386 }
7387
7388 while (branch_fixups != NULL)
7389 {
7390 struct one_branch_fixup *f = branch_fixups;
7391 branch_fixups = branch_fixups->next;
7392 free (f);
7393 }
7394 }
7395
7396 workaround_change = FALSE;
7397 newsize = trampoff;
7398 if (htab->params->ppc476_workaround
7399 && (!bfd_link_relocatable (link_info)
7400 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7401 {
7402 bfd_vma addr, end_addr;
7403 unsigned int crossings;
7404 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7405
7406 addr = isec->output_section->vma + isec->output_offset;
7407 end_addr = addr + trampoff;
7408 addr &= -pagesize;
7409 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7410 if (crossings != 0)
7411 {
7412 /* Keep space aligned, to ensure the patch code itself does
7413 not cross a page. Don't decrease size calculated on a
7414 previous pass as otherwise we might never settle on a layout. */
7415 newsize = 15 - ((end_addr - 1) & 15);
7416 newsize += crossings * 16;
7417 if (relax_info->workaround_size < newsize)
7418 {
7419 relax_info->workaround_size = newsize;
7420 workaround_change = TRUE;
7421 }
7422 /* Ensure relocate_section is called. */
7423 isec->flags |= SEC_RELOC;
7424 }
7425 newsize = trampoff + relax_info->workaround_size;
7426 }
7427
7428 if (htab->params->pic_fixup > 0)
7429 {
7430 picfixup_size -= relax_info->picfixup_size;
7431 if (picfixup_size != 0)
7432 relax_info->picfixup_size += picfixup_size;
7433 newsize += relax_info->picfixup_size;
7434 }
7435
7436 if (changes != 0 || picfixup_size != 0 || workaround_change)
7437 isec->size = newsize;
7438
7439 if (isymbuf != NULL
7440 && symtab_hdr->contents != (unsigned char *) isymbuf)
7441 {
7442 if (! link_info->keep_memory)
7443 free (isymbuf);
7444 else
7445 {
7446 /* Cache the symbols for elf_link_input_bfd. */
7447 symtab_hdr->contents = (unsigned char *) isymbuf;
7448 }
7449 }
7450
7451 if (contents != NULL
7452 && elf_section_data (isec)->this_hdr.contents != contents)
7453 {
7454 if (!changes && !link_info->keep_memory)
7455 free (contents);
7456 else
7457 {
7458 /* Cache the section contents for elf_link_input_bfd. */
7459 elf_section_data (isec)->this_hdr.contents = contents;
7460 }
7461 }
7462
7463 changes += picfixup_size;
7464 if (changes != 0)
7465 {
7466 /* Append sufficient NOP relocs so we can write out relocation
7467 information for the trampolines. */
7468 Elf_Internal_Shdr *rel_hdr;
7469 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7470 * sizeof (*new_relocs));
7471 unsigned ix;
7472
7473 if (!new_relocs)
7474 goto error_return;
7475 memcpy (new_relocs, internal_relocs,
7476 isec->reloc_count * sizeof (*new_relocs));
7477 for (ix = changes; ix--;)
7478 {
7479 irel = new_relocs + ix + isec->reloc_count;
7480
7481 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7482 }
7483 if (internal_relocs != elf_section_data (isec)->relocs)
7484 free (internal_relocs);
7485 elf_section_data (isec)->relocs = new_relocs;
7486 isec->reloc_count += changes;
7487 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7488 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7489 }
7490 else if (internal_relocs != NULL
7491 && elf_section_data (isec)->relocs != internal_relocs)
7492 free (internal_relocs);
7493
7494 *again = changes != 0 || workaround_change;
7495 return TRUE;
7496
7497 error_return:
7498 while (branch_fixups != NULL)
7499 {
7500 struct one_branch_fixup *f = branch_fixups;
7501 branch_fixups = branch_fixups->next;
7502 free (f);
7503 }
7504 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7505 free (isymbuf);
7506 if (contents != NULL
7507 && elf_section_data (isec)->this_hdr.contents != contents)
7508 free (contents);
7509 if (internal_relocs != NULL
7510 && elf_section_data (isec)->relocs != internal_relocs)
7511 free (internal_relocs);
7512 return FALSE;
7513 }
7514 \f
7515 /* What to do when ld finds relocations against symbols defined in
7516 discarded sections. */
7517
7518 static unsigned int
7519 ppc_elf_action_discarded (asection *sec)
7520 {
7521 if (strcmp (".fixup", sec->name) == 0)
7522 return 0;
7523
7524 if (strcmp (".got2", sec->name) == 0)
7525 return 0;
7526
7527 return _bfd_elf_default_action_discarded (sec);
7528 }
7529 \f
7530 /* Fill in the address for a pointer generated in a linker section. */
7531
7532 static bfd_vma
7533 elf_finish_pointer_linker_section (bfd *input_bfd,
7534 elf_linker_section_t *lsect,
7535 struct elf_link_hash_entry *h,
7536 bfd_vma relocation,
7537 const Elf_Internal_Rela *rel)
7538 {
7539 elf_linker_section_pointers_t *linker_section_ptr;
7540
7541 BFD_ASSERT (lsect != NULL);
7542
7543 if (h != NULL)
7544 {
7545 /* Handle global symbol. */
7546 struct ppc_elf_link_hash_entry *eh;
7547
7548 eh = (struct ppc_elf_link_hash_entry *) h;
7549 BFD_ASSERT (eh->elf.def_regular);
7550 linker_section_ptr = eh->linker_section_pointer;
7551 }
7552 else
7553 {
7554 /* Handle local symbol. */
7555 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7556
7557 BFD_ASSERT (is_ppc_elf (input_bfd));
7558 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7559 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7560 }
7561
7562 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7563 rel->r_addend,
7564 lsect);
7565 BFD_ASSERT (linker_section_ptr != NULL);
7566
7567 /* Offset will always be a multiple of four, so use the bottom bit
7568 as a "written" flag. */
7569 if ((linker_section_ptr->offset & 1) == 0)
7570 {
7571 bfd_put_32 (lsect->section->owner,
7572 relocation + linker_section_ptr->addend,
7573 lsect->section->contents + linker_section_ptr->offset);
7574 linker_section_ptr->offset += 1;
7575 }
7576
7577 relocation = (lsect->section->output_section->vma
7578 + lsect->section->output_offset
7579 + linker_section_ptr->offset - 1
7580 - SYM_VAL (lsect->sym));
7581
7582 #ifdef DEBUG
7583 fprintf (stderr,
7584 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7585 lsect->name, (long) relocation, (long) relocation);
7586 #endif
7587
7588 return relocation;
7589 }
7590
7591 #define PPC_LO(v) ((v) & 0xffff)
7592 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7593 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7594
7595 static void
7596 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7597 struct bfd_link_info *info)
7598 {
7599 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7600 bfd *output_bfd = info->output_bfd;
7601 bfd_vma plt;
7602
7603 plt = ((ent->plt.offset & ~1)
7604 + plt_sec->output_section->vma
7605 + plt_sec->output_offset);
7606
7607 if (bfd_link_pic (info))
7608 {
7609 bfd_vma got = 0;
7610
7611 if (ent->addend >= 32768)
7612 got = (ent->addend
7613 + ent->sec->output_section->vma
7614 + ent->sec->output_offset);
7615 else if (htab->elf.hgot != NULL)
7616 got = SYM_VAL (htab->elf.hgot);
7617
7618 plt -= got;
7619
7620 if (plt + 0x8000 < 0x10000)
7621 {
7622 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7623 p += 4;
7624 bfd_put_32 (output_bfd, MTCTR_11, p);
7625 p += 4;
7626 bfd_put_32 (output_bfd, BCTR, p);
7627 p += 4;
7628 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7629 p += 4;
7630 }
7631 else
7632 {
7633 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7636 p += 4;
7637 bfd_put_32 (output_bfd, MTCTR_11, p);
7638 p += 4;
7639 bfd_put_32 (output_bfd, BCTR, p);
7640 p += 4;
7641 }
7642 }
7643 else
7644 {
7645 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7646 p += 4;
7647 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7648 p += 4;
7649 bfd_put_32 (output_bfd, MTCTR_11, p);
7650 p += 4;
7651 bfd_put_32 (output_bfd, BCTR, p);
7652 p += 4;
7653 }
7654 }
7655
7656 /* Return true if symbol is defined statically. */
7657
7658 static bfd_boolean
7659 is_static_defined (struct elf_link_hash_entry *h)
7660 {
7661 return ((h->root.type == bfd_link_hash_defined
7662 || h->root.type == bfd_link_hash_defweak)
7663 && h->root.u.def.section != NULL
7664 && h->root.u.def.section->output_section != NULL);
7665 }
7666
7667 /* If INSN is an opcode that may be used with an @tls operand, return
7668 the transformed insn for TLS optimisation, otherwise return 0. If
7669 REG is non-zero only match an insn with RB or RA equal to REG. */
7670
7671 unsigned int
7672 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7673 {
7674 unsigned int rtra;
7675
7676 if ((insn & (0x3f << 26)) != 31 << 26)
7677 return 0;
7678
7679 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7680 rtra = insn & ((1 << 26) - (1 << 16));
7681 else if (((insn >> 16) & 0x1f) == reg)
7682 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7683 else
7684 return 0;
7685
7686 if ((insn & (0x3ff << 1)) == 266 << 1)
7687 /* add -> addi. */
7688 insn = 14 << 26;
7689 else if ((insn & (0x1f << 1)) == 23 << 1
7690 && ((insn & (0x1f << 6)) < 14 << 6
7691 || ((insn & (0x1f << 6)) >= 16 << 6
7692 && (insn & (0x1f << 6)) < 24 << 6)))
7693 /* load and store indexed -> dform. */
7694 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7695 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7696 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7697 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7698 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7699 /* lwax -> lwa. */
7700 insn = (58 << 26) | 2;
7701 else
7702 return 0;
7703 insn |= rtra;
7704 return insn;
7705 }
7706
7707 /* If INSN is an opcode that may be used with an @tprel operand, return
7708 the transformed insn for an undefined weak symbol, ie. with the
7709 thread pointer REG operand removed. Otherwise return 0. */
7710
7711 unsigned int
7712 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7713 {
7714 if ((insn & (0x1f << 16)) == reg << 16
7715 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7716 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7717 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7718 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7719 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7720 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7721 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7722 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7723 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7724 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7725 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7726 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7727 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7728 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7729 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7730 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7731 && (insn & 3) != 1)
7732 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7733 && ((insn & 3) == 0 || (insn & 3) == 3))))
7734 {
7735 insn &= ~(0x1f << 16);
7736 }
7737 else if ((insn & (0x1f << 21)) == reg << 21
7738 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7739 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7740 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7741 {
7742 insn &= ~(0x1f << 21);
7743 insn |= (insn & (0x1f << 16)) << 5;
7744 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7745 insn -= 2 >> 26; /* convert to ori,oris */
7746 }
7747 else
7748 insn = 0;
7749 return insn;
7750 }
7751
7752 static bfd_boolean
7753 is_insn_ds_form (unsigned int insn)
7754 {
7755 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7756 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7757 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7758 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7759 }
7760
7761 static bfd_boolean
7762 is_insn_dq_form (unsigned int insn)
7763 {
7764 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7765 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7766 && (insn & 3) == 1));
7767 }
7768
7769 /* The RELOCATE_SECTION function is called by the ELF backend linker
7770 to handle the relocations for a section.
7771
7772 The relocs are always passed as Rela structures; if the section
7773 actually uses Rel structures, the r_addend field will always be
7774 zero.
7775
7776 This function is responsible for adjust the section contents as
7777 necessary, and (if using Rela relocs and generating a
7778 relocatable output file) adjusting the reloc addend as
7779 necessary.
7780
7781 This function does not have to worry about setting the reloc
7782 address or the reloc symbol index.
7783
7784 LOCAL_SYMS is a pointer to the swapped in local symbols.
7785
7786 LOCAL_SECTIONS is an array giving the section in the input file
7787 corresponding to the st_shndx field of each local symbol.
7788
7789 The global hash table entry for the global symbols can be found
7790 via elf_sym_hashes (input_bfd).
7791
7792 When generating relocatable output, this function must handle
7793 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7794 going to be the section symbol corresponding to the output
7795 section, which means that the addend must be adjusted
7796 accordingly. */
7797
7798 static bfd_boolean
7799 ppc_elf_relocate_section (bfd *output_bfd,
7800 struct bfd_link_info *info,
7801 bfd *input_bfd,
7802 asection *input_section,
7803 bfd_byte *contents,
7804 Elf_Internal_Rela *relocs,
7805 Elf_Internal_Sym *local_syms,
7806 asection **local_sections)
7807 {
7808 Elf_Internal_Shdr *symtab_hdr;
7809 struct elf_link_hash_entry **sym_hashes;
7810 struct ppc_elf_link_hash_table *htab;
7811 Elf_Internal_Rela *rel;
7812 Elf_Internal_Rela *wrel;
7813 Elf_Internal_Rela *relend;
7814 Elf_Internal_Rela outrel;
7815 asection *got2;
7816 bfd_vma *local_got_offsets;
7817 bfd_boolean ret = TRUE;
7818 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7819 bfd_boolean is_vxworks_tls;
7820 unsigned int picfixup_size = 0;
7821 struct ppc_elf_relax_info *relax_info = NULL;
7822
7823 #ifdef DEBUG
7824 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7825 "%ld relocations%s",
7826 input_bfd, input_section,
7827 (long) input_section->reloc_count,
7828 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7829 #endif
7830
7831 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7832
7833 /* Initialize howto table if not already done. */
7834 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7835 ppc_elf_howto_init ();
7836
7837 htab = ppc_elf_hash_table (info);
7838 local_got_offsets = elf_local_got_offsets (input_bfd);
7839 symtab_hdr = &elf_symtab_hdr (input_bfd);
7840 sym_hashes = elf_sym_hashes (input_bfd);
7841 /* We have to handle relocations in vxworks .tls_vars sections
7842 specially, because the dynamic loader is 'weird'. */
7843 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7844 && !strcmp (input_section->output_section->name,
7845 ".tls_vars"));
7846 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7847 relax_info = elf_section_data (input_section)->sec_info;
7848 rel = wrel = relocs;
7849 relend = relocs + input_section->reloc_count;
7850 for (; rel < relend; wrel++, rel++)
7851 {
7852 enum elf_ppc_reloc_type r_type;
7853 bfd_vma addend;
7854 bfd_reloc_status_type r;
7855 Elf_Internal_Sym *sym;
7856 asection *sec;
7857 struct elf_link_hash_entry *h;
7858 const char *sym_name;
7859 reloc_howto_type *howto;
7860 unsigned long r_symndx;
7861 bfd_vma relocation;
7862 bfd_vma branch_bit, from;
7863 bfd_boolean unresolved_reloc;
7864 bfd_boolean warned;
7865 unsigned int tls_type, tls_mask, tls_gd;
7866 struct plt_entry **ifunc;
7867 struct reloc_howto_struct alt_howto;
7868
7869 again:
7870 r_type = ELF32_R_TYPE (rel->r_info);
7871 sym = NULL;
7872 sec = NULL;
7873 h = NULL;
7874 unresolved_reloc = FALSE;
7875 warned = FALSE;
7876 r_symndx = ELF32_R_SYM (rel->r_info);
7877
7878 if (r_symndx < symtab_hdr->sh_info)
7879 {
7880 sym = local_syms + r_symndx;
7881 sec = local_sections[r_symndx];
7882 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7883
7884 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7885 }
7886 else
7887 {
7888 bfd_boolean ignored;
7889
7890 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7891 r_symndx, symtab_hdr, sym_hashes,
7892 h, sec, relocation,
7893 unresolved_reloc, warned, ignored);
7894
7895 sym_name = h->root.root.string;
7896 }
7897
7898 if (sec != NULL && discarded_section (sec))
7899 {
7900 /* For relocs against symbols from removed linkonce sections,
7901 or sections discarded by a linker script, we just want the
7902 section contents zeroed. Avoid any special processing. */
7903 howto = NULL;
7904 if (r_type < R_PPC_max)
7905 howto = ppc_elf_howto_table[r_type];
7906
7907 _bfd_clear_contents (howto, input_bfd, input_section,
7908 contents + rel->r_offset);
7909 wrel->r_offset = rel->r_offset;
7910 wrel->r_info = 0;
7911 wrel->r_addend = 0;
7912
7913 /* For ld -r, remove relocations in debug sections against
7914 sections defined in discarded sections. Not done for
7915 non-debug to preserve relocs in .eh_frame which the
7916 eh_frame editing code expects to be present. */
7917 if (bfd_link_relocatable (info)
7918 && (input_section->flags & SEC_DEBUGGING))
7919 wrel--;
7920
7921 continue;
7922 }
7923
7924 if (bfd_link_relocatable (info))
7925 {
7926 if (got2 != NULL
7927 && r_type == R_PPC_PLTREL24
7928 && rel->r_addend != 0)
7929 {
7930 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7931 addend specifies the GOT pointer offset within .got2. */
7932 rel->r_addend += got2->output_offset;
7933 }
7934 if (r_type != R_PPC_RELAX_PLT
7935 && r_type != R_PPC_RELAX_PLTREL24
7936 && r_type != R_PPC_RELAX)
7937 goto copy_reloc;
7938 }
7939
7940 /* TLS optimizations. Replace instruction sequences and relocs
7941 based on information we collected in tls_optimize. We edit
7942 RELOCS so that --emit-relocs will output something sensible
7943 for the final instruction stream. */
7944 tls_mask = 0;
7945 tls_gd = 0;
7946 if (h != NULL)
7947 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7948 else if (local_got_offsets != NULL)
7949 {
7950 struct plt_entry **local_plt;
7951 char *lgot_masks;
7952 local_plt
7953 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7954 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7955 tls_mask = lgot_masks[r_symndx];
7956 }
7957
7958 /* Ensure reloc mapping code below stays sane. */
7959 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7960 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7961 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7962 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7963 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7964 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7965 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7966 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7967 abort ();
7968 switch (r_type)
7969 {
7970 default:
7971 break;
7972
7973 case R_PPC_GOT_TPREL16:
7974 case R_PPC_GOT_TPREL16_LO:
7975 if ((tls_mask & TLS_TLS) != 0
7976 && (tls_mask & TLS_TPREL) == 0)
7977 {
7978 bfd_vma insn;
7979
7980 insn = bfd_get_32 (input_bfd,
7981 contents + rel->r_offset - d_offset);
7982 insn &= 31 << 21;
7983 insn |= 0x3c020000; /* addis 0,2,0 */
7984 bfd_put_32 (input_bfd, insn,
7985 contents + rel->r_offset - d_offset);
7986 r_type = R_PPC_TPREL16_HA;
7987 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7988 }
7989 break;
7990
7991 case R_PPC_TLS:
7992 if ((tls_mask & TLS_TLS) != 0
7993 && (tls_mask & TLS_TPREL) == 0)
7994 {
7995 bfd_vma insn;
7996
7997 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7998 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7999 if (insn == 0)
8000 abort ();
8001 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8002 r_type = R_PPC_TPREL16_LO;
8003 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8004
8005 /* Was PPC_TLS which sits on insn boundary, now
8006 PPC_TPREL16_LO which is at low-order half-word. */
8007 rel->r_offset += d_offset;
8008 }
8009 break;
8010
8011 case R_PPC_GOT_TLSGD16_HI:
8012 case R_PPC_GOT_TLSGD16_HA:
8013 tls_gd = TLS_TPRELGD;
8014 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8015 goto tls_gdld_hi;
8016 break;
8017
8018 case R_PPC_GOT_TLSLD16_HI:
8019 case R_PPC_GOT_TLSLD16_HA:
8020 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8021 {
8022 tls_gdld_hi:
8023 if ((tls_mask & tls_gd) != 0)
8024 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8025 + R_PPC_GOT_TPREL16);
8026 else
8027 {
8028 rel->r_offset -= d_offset;
8029 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8030 r_type = R_PPC_NONE;
8031 }
8032 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8033 }
8034 break;
8035
8036 case R_PPC_GOT_TLSGD16:
8037 case R_PPC_GOT_TLSGD16_LO:
8038 tls_gd = TLS_TPRELGD;
8039 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8040 goto tls_ldgd_opt;
8041 break;
8042
8043 case R_PPC_GOT_TLSLD16:
8044 case R_PPC_GOT_TLSLD16_LO:
8045 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8046 {
8047 unsigned int insn1, insn2;
8048 bfd_vma offset;
8049
8050 tls_ldgd_opt:
8051 offset = (bfd_vma) -1;
8052 /* If not using the newer R_PPC_TLSGD/LD to mark
8053 __tls_get_addr calls, we must trust that the call
8054 stays with its arg setup insns, ie. that the next
8055 reloc is the __tls_get_addr call associated with
8056 the current reloc. Edit both insns. */
8057 if (input_section->has_tls_get_addr_call
8058 && rel + 1 < relend
8059 && branch_reloc_hash_match (input_bfd, rel + 1,
8060 htab->tls_get_addr))
8061 offset = rel[1].r_offset;
8062 /* We read the low GOT_TLS insn because we need to keep
8063 the destination reg. It may be something other than
8064 the usual r3, and moved to r3 before the call by
8065 intervening code. */
8066 insn1 = bfd_get_32 (input_bfd,
8067 contents + rel->r_offset - d_offset);
8068 if ((tls_mask & tls_gd) != 0)
8069 {
8070 /* IE */
8071 insn1 &= (0x1f << 21) | (0x1f << 16);
8072 insn1 |= 32 << 26; /* lwz */
8073 if (offset != (bfd_vma) -1)
8074 {
8075 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8076 insn2 = 0x7c631214; /* add 3,3,2 */
8077 bfd_put_32 (input_bfd, insn2, contents + offset);
8078 }
8079 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8080 + R_PPC_GOT_TPREL16);
8081 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8082 }
8083 else
8084 {
8085 /* LE */
8086 insn1 &= 0x1f << 21;
8087 insn1 |= 0x3c020000; /* addis r,2,0 */
8088 if (tls_gd == 0)
8089 {
8090 /* Was an LD reloc. */
8091 for (r_symndx = 0;
8092 r_symndx < symtab_hdr->sh_info;
8093 r_symndx++)
8094 if (local_sections[r_symndx] == sec)
8095 break;
8096 if (r_symndx >= symtab_hdr->sh_info)
8097 r_symndx = STN_UNDEF;
8098 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8099 if (r_symndx != STN_UNDEF)
8100 rel->r_addend -= (local_syms[r_symndx].st_value
8101 + sec->output_offset
8102 + sec->output_section->vma);
8103 }
8104 r_type = R_PPC_TPREL16_HA;
8105 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8106 if (offset != (bfd_vma) -1)
8107 {
8108 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8109 rel[1].r_offset = offset + d_offset;
8110 rel[1].r_addend = rel->r_addend;
8111 insn2 = 0x38630000; /* addi 3,3,0 */
8112 bfd_put_32 (input_bfd, insn2, contents + offset);
8113 }
8114 }
8115 bfd_put_32 (input_bfd, insn1,
8116 contents + rel->r_offset - d_offset);
8117 if (tls_gd == 0)
8118 {
8119 /* We changed the symbol on an LD reloc. Start over
8120 in order to get h, sym, sec etc. right. */
8121 goto again;
8122 }
8123 }
8124 break;
8125
8126 case R_PPC_TLSGD:
8127 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8128 {
8129 unsigned int insn2;
8130 bfd_vma offset = rel->r_offset;
8131
8132 if ((tls_mask & TLS_TPRELGD) != 0)
8133 {
8134 /* IE */
8135 r_type = R_PPC_NONE;
8136 insn2 = 0x7c631214; /* add 3,3,2 */
8137 }
8138 else
8139 {
8140 /* LE */
8141 r_type = R_PPC_TPREL16_LO;
8142 rel->r_offset += d_offset;
8143 insn2 = 0x38630000; /* addi 3,3,0 */
8144 }
8145 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8146 bfd_put_32 (input_bfd, insn2, contents + offset);
8147 /* Zap the reloc on the _tls_get_addr call too. */
8148 BFD_ASSERT (offset == rel[1].r_offset);
8149 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8150 }
8151 break;
8152
8153 case R_PPC_TLSLD:
8154 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8155 {
8156 unsigned int insn2;
8157
8158 for (r_symndx = 0;
8159 r_symndx < symtab_hdr->sh_info;
8160 r_symndx++)
8161 if (local_sections[r_symndx] == sec)
8162 break;
8163 if (r_symndx >= symtab_hdr->sh_info)
8164 r_symndx = STN_UNDEF;
8165 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8166 if (r_symndx != STN_UNDEF)
8167 rel->r_addend -= (local_syms[r_symndx].st_value
8168 + sec->output_offset
8169 + sec->output_section->vma);
8170
8171 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8172 rel->r_offset += d_offset;
8173 insn2 = 0x38630000; /* addi 3,3,0 */
8174 bfd_put_32 (input_bfd, insn2,
8175 contents + rel->r_offset - d_offset);
8176 /* Zap the reloc on the _tls_get_addr call too. */
8177 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8178 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8179 goto again;
8180 }
8181 break;
8182 }
8183
8184 /* Handle other relocations that tweak non-addend part of insn. */
8185 branch_bit = 0;
8186 switch (r_type)
8187 {
8188 default:
8189 break;
8190
8191 /* Branch taken prediction relocations. */
8192 case R_PPC_ADDR14_BRTAKEN:
8193 case R_PPC_REL14_BRTAKEN:
8194 branch_bit = BRANCH_PREDICT_BIT;
8195 /* Fall through. */
8196
8197 /* Branch not taken prediction relocations. */
8198 case R_PPC_ADDR14_BRNTAKEN:
8199 case R_PPC_REL14_BRNTAKEN:
8200 {
8201 bfd_vma insn;
8202
8203 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8204 insn &= ~BRANCH_PREDICT_BIT;
8205 insn |= branch_bit;
8206
8207 from = (rel->r_offset
8208 + input_section->output_offset
8209 + input_section->output_section->vma);
8210
8211 /* Invert 'y' bit if not the default. */
8212 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8213 insn ^= BRANCH_PREDICT_BIT;
8214
8215 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8216 break;
8217 }
8218 }
8219
8220 if (ELIMINATE_COPY_RELOCS
8221 && h != NULL
8222 && !h->def_regular
8223 && h->protected_def
8224 && ppc_elf_hash_entry (h)->has_addr16_ha
8225 && ppc_elf_hash_entry (h)->has_addr16_lo
8226 && htab->params->pic_fixup > 0)
8227 {
8228 /* Convert lis;addi or lis;load/store accessing a protected
8229 variable defined in a shared library to PIC. */
8230 unsigned int insn;
8231
8232 if (r_type == R_PPC_ADDR16_HA)
8233 {
8234 insn = bfd_get_32 (input_bfd,
8235 contents + rel->r_offset - d_offset);
8236 if ((insn & (0x3f << 26)) == (15u << 26)
8237 && (insn & (0x1f << 16)) == 0 /* lis */)
8238 {
8239 bfd_byte *p;
8240 bfd_vma off;
8241 bfd_vma got_addr;
8242
8243 p = (contents + input_section->size
8244 - relax_info->workaround_size
8245 - relax_info->picfixup_size
8246 + picfixup_size);
8247 off = (p - contents) - (rel->r_offset - d_offset);
8248 if (off > 0x1fffffc || (off & 3) != 0)
8249 info->callbacks->einfo
8250 (_("%P: %H: fixup branch overflow\n"),
8251 input_bfd, input_section, rel->r_offset);
8252
8253 bfd_put_32 (input_bfd, B | off,
8254 contents + rel->r_offset - d_offset);
8255 got_addr = (htab->elf.sgot->output_section->vma
8256 + htab->elf.sgot->output_offset
8257 + (h->got.offset & ~1));
8258 wrel->r_offset = (p - contents) + d_offset;
8259 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8260 wrel->r_addend = got_addr;
8261 insn &= ~0xffff;
8262 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8263 bfd_put_32 (input_bfd, insn, p);
8264
8265 /* Convert lis to lwz, loading address from GOT. */
8266 insn &= ~0xffff;
8267 insn ^= (32u ^ 15u) << 26;
8268 insn |= (insn & (0x1f << 21)) >> 5;
8269 insn |= got_addr & 0xffff;
8270 bfd_put_32 (input_bfd, insn, p + 4);
8271
8272 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8273 picfixup_size += 12;
8274
8275 /* Use one of the spare relocs, so --emit-relocs
8276 output is reasonable. */
8277 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8278 wrel++, rel++;
8279 rel->r_offset = wrel[-1].r_offset + 4;
8280 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8281 rel->r_addend = wrel[-1].r_addend;
8282
8283 /* Continue on as if we had a got reloc, to output
8284 dynamic reloc. */
8285 r_type = R_PPC_GOT16_LO;
8286 }
8287 else
8288 info->callbacks->einfo
8289 /* xgettext:c-format */
8290 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8291 input_bfd, input_section, rel->r_offset,
8292 "R_PPC_ADDR16_HA", insn);
8293 }
8294 else if (r_type == R_PPC_ADDR16_LO)
8295 {
8296 insn = bfd_get_32 (input_bfd,
8297 contents + rel->r_offset - d_offset);
8298 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8299 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8300 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8301 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8302 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8303 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8304 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8305 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8306 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8307 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8308 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8309 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8310 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8311 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8312 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8313 && (insn & 3) != 1)
8314 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8315 && ((insn & 3) == 0 || (insn & 3) == 3)))
8316 {
8317 /* Arrange to apply the reloc addend, if any. */
8318 relocation = 0;
8319 unresolved_reloc = FALSE;
8320 rel->r_info = ELF32_R_INFO (0, r_type);
8321 }
8322 else
8323 info->callbacks->einfo
8324 /* xgettext:c-format */
8325 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8326 input_bfd, input_section, rel->r_offset,
8327 "R_PPC_ADDR16_LO", insn);
8328 }
8329 }
8330
8331 ifunc = NULL;
8332 if (!htab->is_vxworks)
8333 {
8334 struct plt_entry *ent;
8335
8336 if (h != NULL)
8337 {
8338 if (h->type == STT_GNU_IFUNC)
8339 ifunc = &h->plt.plist;
8340 }
8341 else if (local_got_offsets != NULL
8342 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8343 {
8344 struct plt_entry **local_plt;
8345
8346 local_plt = (struct plt_entry **) (local_got_offsets
8347 + symtab_hdr->sh_info);
8348 ifunc = local_plt + r_symndx;
8349 }
8350
8351 ent = NULL;
8352 if (ifunc != NULL
8353 && (!bfd_link_pic (info)
8354 || is_branch_reloc (r_type)))
8355 {
8356 addend = 0;
8357 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8358 addend = rel->r_addend;
8359 ent = find_plt_ent (ifunc, got2, addend);
8360 }
8361 if (ent != NULL)
8362 {
8363 if (bfd_link_pic (info)
8364 && ent->sec != got2
8365 && htab->plt_type != PLT_NEW
8366 && (!htab->elf.dynamic_sections_created
8367 || h == NULL
8368 || h->dynindx == -1))
8369 {
8370 /* Uh oh, we are going to create a pic glink stub
8371 for an ifunc (here for h == NULL and later in
8372 finish_dynamic_symbol for h != NULL), and
8373 apparently are using code compiled with
8374 -mbss-plt. The difficulty is that -mbss-plt code
8375 gives no indication via a magic PLTREL24 addend
8376 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8377 is pointing into a .got2 section (and how far
8378 into .got2). */
8379 info->callbacks->einfo
8380 /* xgettext:c-format */
8381 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8382 input_bfd, input_section, rel->r_offset, sym_name);
8383 }
8384 if (h == NULL && (ent->plt.offset & 1) == 0)
8385 {
8386 Elf_Internal_Rela rela;
8387 bfd_byte *loc;
8388
8389 rela.r_offset = (htab->elf.iplt->output_section->vma
8390 + htab->elf.iplt->output_offset
8391 + ent->plt.offset);
8392 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8393 rela.r_addend = relocation;
8394 loc = htab->elf.irelplt->contents;
8395 loc += (htab->elf.irelplt->reloc_count++
8396 * sizeof (Elf32_External_Rela));
8397 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8398
8399 ent->plt.offset |= 1;
8400 }
8401 if (h == NULL && (ent->glink_offset & 1) == 0)
8402 {
8403 unsigned char *p = ((unsigned char *) htab->glink->contents
8404 + ent->glink_offset);
8405 write_glink_stub (ent, htab->elf.iplt, p, info);
8406 ent->glink_offset |= 1;
8407 }
8408
8409 unresolved_reloc = FALSE;
8410 if (htab->plt_type == PLT_NEW
8411 || !htab->elf.dynamic_sections_created
8412 || h == NULL
8413 || h->dynindx == -1)
8414 relocation = (htab->glink->output_section->vma
8415 + htab->glink->output_offset
8416 + (ent->glink_offset & ~1));
8417 else
8418 relocation = (htab->elf.splt->output_section->vma
8419 + htab->elf.splt->output_offset
8420 + ent->plt.offset);
8421 }
8422 }
8423
8424 addend = rel->r_addend;
8425 tls_type = 0;
8426 howto = NULL;
8427 if (r_type < R_PPC_max)
8428 howto = ppc_elf_howto_table[r_type];
8429 switch (r_type)
8430 {
8431 default:
8432 info->callbacks->einfo
8433 /* xgettext:c-format */
8434 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8435 input_bfd, (int) r_type, sym_name);
8436
8437 bfd_set_error (bfd_error_bad_value);
8438 ret = FALSE;
8439 goto copy_reloc;
8440
8441 case R_PPC_NONE:
8442 case R_PPC_TLS:
8443 case R_PPC_TLSGD:
8444 case R_PPC_TLSLD:
8445 case R_PPC_EMB_MRKREF:
8446 case R_PPC_GNU_VTINHERIT:
8447 case R_PPC_GNU_VTENTRY:
8448 goto copy_reloc;
8449
8450 /* GOT16 relocations. Like an ADDR16 using the symbol's
8451 address in the GOT as relocation value instead of the
8452 symbol's value itself. Also, create a GOT entry for the
8453 symbol and put the symbol value there. */
8454 case R_PPC_GOT_TLSGD16:
8455 case R_PPC_GOT_TLSGD16_LO:
8456 case R_PPC_GOT_TLSGD16_HI:
8457 case R_PPC_GOT_TLSGD16_HA:
8458 tls_type = TLS_TLS | TLS_GD;
8459 goto dogot;
8460
8461 case R_PPC_GOT_TLSLD16:
8462 case R_PPC_GOT_TLSLD16_LO:
8463 case R_PPC_GOT_TLSLD16_HI:
8464 case R_PPC_GOT_TLSLD16_HA:
8465 tls_type = TLS_TLS | TLS_LD;
8466 goto dogot;
8467
8468 case R_PPC_GOT_TPREL16:
8469 case R_PPC_GOT_TPREL16_LO:
8470 case R_PPC_GOT_TPREL16_HI:
8471 case R_PPC_GOT_TPREL16_HA:
8472 tls_type = TLS_TLS | TLS_TPREL;
8473 goto dogot;
8474
8475 case R_PPC_GOT_DTPREL16:
8476 case R_PPC_GOT_DTPREL16_LO:
8477 case R_PPC_GOT_DTPREL16_HI:
8478 case R_PPC_GOT_DTPREL16_HA:
8479 tls_type = TLS_TLS | TLS_DTPREL;
8480 goto dogot;
8481
8482 case R_PPC_GOT16:
8483 case R_PPC_GOT16_LO:
8484 case R_PPC_GOT16_HI:
8485 case R_PPC_GOT16_HA:
8486 tls_mask = 0;
8487 dogot:
8488 {
8489 /* Relocation is to the entry for this symbol in the global
8490 offset table. */
8491 bfd_vma off;
8492 bfd_vma *offp;
8493 unsigned long indx;
8494
8495 if (htab->elf.sgot == NULL)
8496 abort ();
8497
8498 indx = 0;
8499 if (tls_type == (TLS_TLS | TLS_LD)
8500 && (h == NULL
8501 || !h->def_dynamic))
8502 offp = &htab->tlsld_got.offset;
8503 else if (h != NULL)
8504 {
8505 bfd_boolean dyn;
8506 dyn = htab->elf.dynamic_sections_created;
8507 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8508 || (bfd_link_pic (info)
8509 && SYMBOL_REFERENCES_LOCAL (info, h)))
8510 /* This is actually a static link, or it is a
8511 -Bsymbolic link and the symbol is defined
8512 locally, or the symbol was forced to be local
8513 because of a version file. */
8514 ;
8515 else
8516 {
8517 BFD_ASSERT (h->dynindx != -1);
8518 indx = h->dynindx;
8519 unresolved_reloc = FALSE;
8520 }
8521 offp = &h->got.offset;
8522 }
8523 else
8524 {
8525 if (local_got_offsets == NULL)
8526 abort ();
8527 offp = &local_got_offsets[r_symndx];
8528 }
8529
8530 /* The offset must always be a multiple of 4. We use the
8531 least significant bit to record whether we have already
8532 processed this entry. */
8533 off = *offp;
8534 if ((off & 1) != 0)
8535 off &= ~1;
8536 else
8537 {
8538 unsigned int tls_m = (tls_mask
8539 & (TLS_LD | TLS_GD | TLS_DTPREL
8540 | TLS_TPREL | TLS_TPRELGD));
8541
8542 if (offp == &htab->tlsld_got.offset)
8543 tls_m = TLS_LD;
8544 else if (h == NULL
8545 || !h->def_dynamic)
8546 tls_m &= ~TLS_LD;
8547
8548 /* We might have multiple got entries for this sym.
8549 Initialize them all. */
8550 do
8551 {
8552 int tls_ty = 0;
8553
8554 if ((tls_m & TLS_LD) != 0)
8555 {
8556 tls_ty = TLS_TLS | TLS_LD;
8557 tls_m &= ~TLS_LD;
8558 }
8559 else if ((tls_m & TLS_GD) != 0)
8560 {
8561 tls_ty = TLS_TLS | TLS_GD;
8562 tls_m &= ~TLS_GD;
8563 }
8564 else if ((tls_m & TLS_DTPREL) != 0)
8565 {
8566 tls_ty = TLS_TLS | TLS_DTPREL;
8567 tls_m &= ~TLS_DTPREL;
8568 }
8569 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8570 {
8571 tls_ty = TLS_TLS | TLS_TPREL;
8572 tls_m = 0;
8573 }
8574
8575 /* Generate relocs for the dynamic linker. */
8576 if ((bfd_link_pic (info) || indx != 0)
8577 && (offp == &htab->tlsld_got.offset
8578 || h == NULL
8579 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8580 || h->root.type != bfd_link_hash_undefweak))
8581 {
8582 asection *rsec = htab->elf.srelgot;
8583 bfd_byte * loc;
8584
8585 if (ifunc != NULL)
8586 rsec = htab->elf.irelplt;
8587 outrel.r_offset = (htab->elf.sgot->output_section->vma
8588 + htab->elf.sgot->output_offset
8589 + off);
8590 outrel.r_addend = 0;
8591 if (tls_ty & (TLS_LD | TLS_GD))
8592 {
8593 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8594 if (tls_ty == (TLS_TLS | TLS_GD))
8595 {
8596 loc = rsec->contents;
8597 loc += (rsec->reloc_count++
8598 * sizeof (Elf32_External_Rela));
8599 bfd_elf32_swap_reloca_out (output_bfd,
8600 &outrel, loc);
8601 outrel.r_offset += 4;
8602 outrel.r_info
8603 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8604 }
8605 }
8606 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8607 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8608 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8609 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8610 else if (indx != 0)
8611 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8612 else if (ifunc != NULL)
8613 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8614 else
8615 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8616 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8617 {
8618 outrel.r_addend += relocation;
8619 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8620 {
8621 if (htab->elf.tls_sec == NULL)
8622 outrel.r_addend = 0;
8623 else
8624 outrel.r_addend -= htab->elf.tls_sec->vma;
8625 }
8626 }
8627 loc = rsec->contents;
8628 loc += (rsec->reloc_count++
8629 * sizeof (Elf32_External_Rela));
8630 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8631 }
8632
8633 /* Init the .got section contents if we're not
8634 emitting a reloc. */
8635 else
8636 {
8637 bfd_vma value = relocation;
8638
8639 if (tls_ty == (TLS_TLS | TLS_LD))
8640 value = 1;
8641 else if (tls_ty != 0)
8642 {
8643 if (htab->elf.tls_sec == NULL)
8644 value = 0;
8645 else
8646 {
8647 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8648 if (tls_ty == (TLS_TLS | TLS_TPREL))
8649 value += DTP_OFFSET - TP_OFFSET;
8650 }
8651
8652 if (tls_ty == (TLS_TLS | TLS_GD))
8653 {
8654 bfd_put_32 (input_bfd, value,
8655 htab->elf.sgot->contents + off + 4);
8656 value = 1;
8657 }
8658 }
8659 bfd_put_32 (input_bfd, value,
8660 htab->elf.sgot->contents + off);
8661 }
8662
8663 off += 4;
8664 if (tls_ty & (TLS_LD | TLS_GD))
8665 off += 4;
8666 }
8667 while (tls_m != 0);
8668
8669 off = *offp;
8670 *offp = off | 1;
8671 }
8672
8673 if (off >= (bfd_vma) -2)
8674 abort ();
8675
8676 if ((tls_type & TLS_TLS) != 0)
8677 {
8678 if (tls_type != (TLS_TLS | TLS_LD))
8679 {
8680 if ((tls_mask & TLS_LD) != 0
8681 && !(h == NULL
8682 || !h->def_dynamic))
8683 off += 8;
8684 if (tls_type != (TLS_TLS | TLS_GD))
8685 {
8686 if ((tls_mask & TLS_GD) != 0)
8687 off += 8;
8688 if (tls_type != (TLS_TLS | TLS_DTPREL))
8689 {
8690 if ((tls_mask & TLS_DTPREL) != 0)
8691 off += 4;
8692 }
8693 }
8694 }
8695 }
8696
8697 /* If here for a picfixup, we're done. */
8698 if (r_type != ELF32_R_TYPE (rel->r_info))
8699 goto copy_reloc;
8700
8701 relocation = (htab->elf.sgot->output_section->vma
8702 + htab->elf.sgot->output_offset
8703 + off
8704 - SYM_VAL (htab->elf.hgot));
8705
8706 /* Addends on got relocations don't make much sense.
8707 x+off@got is actually x@got+off, and since the got is
8708 generated by a hash table traversal, the value in the
8709 got at entry m+n bears little relation to the entry m. */
8710 if (addend != 0)
8711 info->callbacks->einfo
8712 /* xgettext:c-format */
8713 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8714 input_bfd, input_section, rel->r_offset,
8715 howto->name,
8716 sym_name);
8717 }
8718 break;
8719
8720 /* Relocations that need no special processing. */
8721 case R_PPC_LOCAL24PC:
8722 /* It makes no sense to point a local relocation
8723 at a symbol not in this object. */
8724 if (unresolved_reloc)
8725 {
8726 (*info->callbacks->undefined_symbol) (info,
8727 h->root.root.string,
8728 input_bfd,
8729 input_section,
8730 rel->r_offset,
8731 TRUE);
8732 goto copy_reloc;
8733 }
8734 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8735 {
8736 /* @local on an ifunc does not really make sense since
8737 the ifunc resolver can take you anywhere. More
8738 seriously, calls to ifuncs must go through a plt call
8739 stub, and for pic the plt call stubs uses r30 to
8740 access the PLT. The problem is that a call that is
8741 local won't have the +32k reloc addend trick marking
8742 -fPIC code, so the linker won't know whether r30 is
8743 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8744 /* xgettext:c-format */
8745 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8746 input_bfd, input_section, rel->r_offset,
8747 h->root.root.string);
8748 }
8749 break;
8750
8751 case R_PPC_DTPREL16:
8752 case R_PPC_DTPREL16_LO:
8753 case R_PPC_DTPREL16_HI:
8754 case R_PPC_DTPREL16_HA:
8755 if (htab->elf.tls_sec != NULL)
8756 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8757 break;
8758
8759 /* Relocations that may need to be propagated if this is a shared
8760 object. */
8761 case R_PPC_TPREL16:
8762 case R_PPC_TPREL16_LO:
8763 case R_PPC_TPREL16_HI:
8764 case R_PPC_TPREL16_HA:
8765 if (h != NULL
8766 && h->root.type == bfd_link_hash_undefweak
8767 && h->dynindx == -1)
8768 {
8769 /* Make this relocation against an undefined weak symbol
8770 resolve to zero. This is really just a tweak, since
8771 code using weak externs ought to check that they are
8772 defined before using them. */
8773 bfd_byte *p = contents + rel->r_offset - d_offset;
8774 unsigned int insn = bfd_get_32 (input_bfd, p);
8775 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8776 if (insn != 0)
8777 bfd_put_32 (input_bfd, insn, p);
8778 break;
8779 }
8780 if (htab->elf.tls_sec != NULL)
8781 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8782 /* The TPREL16 relocs shouldn't really be used in shared
8783 libs as they will result in DT_TEXTREL being set, but
8784 support them anyway. */
8785 goto dodyn;
8786
8787 case R_PPC_TPREL32:
8788 if (htab->elf.tls_sec != NULL)
8789 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8790 goto dodyn;
8791
8792 case R_PPC_DTPREL32:
8793 if (htab->elf.tls_sec != NULL)
8794 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8795 goto dodyn;
8796
8797 case R_PPC_DTPMOD32:
8798 relocation = 1;
8799 addend = 0;
8800 goto dodyn;
8801
8802 case R_PPC_REL16:
8803 case R_PPC_REL16_LO:
8804 case R_PPC_REL16_HI:
8805 case R_PPC_REL16_HA:
8806 case R_PPC_REL16DX_HA:
8807 break;
8808
8809 case R_PPC_REL32:
8810 if (h == NULL || h == htab->elf.hgot)
8811 break;
8812 /* fall through */
8813
8814 case R_PPC_ADDR32:
8815 case R_PPC_ADDR16:
8816 case R_PPC_ADDR16_LO:
8817 case R_PPC_ADDR16_HI:
8818 case R_PPC_ADDR16_HA:
8819 case R_PPC_UADDR32:
8820 case R_PPC_UADDR16:
8821 goto dodyn;
8822
8823 case R_PPC_VLE_REL8:
8824 case R_PPC_VLE_REL15:
8825 case R_PPC_VLE_REL24:
8826 case R_PPC_REL24:
8827 case R_PPC_REL14:
8828 case R_PPC_REL14_BRTAKEN:
8829 case R_PPC_REL14_BRNTAKEN:
8830 /* If these relocations are not to a named symbol, they can be
8831 handled right here, no need to bother the dynamic linker. */
8832 if (SYMBOL_CALLS_LOCAL (info, h)
8833 || h == htab->elf.hgot)
8834 break;
8835 /* fall through */
8836
8837 case R_PPC_ADDR24:
8838 case R_PPC_ADDR14:
8839 case R_PPC_ADDR14_BRTAKEN:
8840 case R_PPC_ADDR14_BRNTAKEN:
8841 if (h != NULL && !bfd_link_pic (info))
8842 break;
8843 /* fall through */
8844
8845 dodyn:
8846 if ((input_section->flags & SEC_ALLOC) == 0
8847 || is_vxworks_tls)
8848 break;
8849
8850 if ((bfd_link_pic (info)
8851 && !(h != NULL
8852 && ((h->root.type == bfd_link_hash_undefined
8853 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8854 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8855 || (h->root.type == bfd_link_hash_undefweak
8856 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8857 && (must_be_dyn_reloc (info, r_type)
8858 || !SYMBOL_CALLS_LOCAL (info, h)))
8859 || (ELIMINATE_COPY_RELOCS
8860 && !bfd_link_pic (info)
8861 && h != NULL
8862 && h->dynindx != -1
8863 && !h->non_got_ref
8864 && !h->def_regular
8865 && !(h->protected_def
8866 && ppc_elf_hash_entry (h)->has_addr16_ha
8867 && ppc_elf_hash_entry (h)->has_addr16_lo
8868 && htab->params->pic_fixup > 0)))
8869 {
8870 int skip;
8871 bfd_byte *loc;
8872 asection *sreloc;
8873 #ifdef DEBUG
8874 fprintf (stderr, "ppc_elf_relocate_section needs to "
8875 "create relocation for %s\n",
8876 (h && h->root.root.string
8877 ? h->root.root.string : "<unknown>"));
8878 #endif
8879
8880 /* When generating a shared object, these relocations
8881 are copied into the output file to be resolved at run
8882 time. */
8883 sreloc = elf_section_data (input_section)->sreloc;
8884 if (ifunc)
8885 sreloc = htab->elf.irelplt;
8886 if (sreloc == NULL)
8887 return FALSE;
8888
8889 skip = 0;
8890 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8891 input_section,
8892 rel->r_offset);
8893 if (outrel.r_offset == (bfd_vma) -1
8894 || outrel.r_offset == (bfd_vma) -2)
8895 skip = (int) outrel.r_offset;
8896 outrel.r_offset += (input_section->output_section->vma
8897 + input_section->output_offset);
8898
8899 if (skip)
8900 memset (&outrel, 0, sizeof outrel);
8901 else if ((h != NULL
8902 && (h->root.type == bfd_link_hash_undefined
8903 || h->root.type == bfd_link_hash_undefweak))
8904 || !SYMBOL_REFERENCES_LOCAL (info, h))
8905 {
8906 BFD_ASSERT (h->dynindx != -1);
8907 unresolved_reloc = FALSE;
8908 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8909 outrel.r_addend = rel->r_addend;
8910 }
8911 else
8912 {
8913 outrel.r_addend = relocation + rel->r_addend;
8914
8915 if (r_type != R_PPC_ADDR32)
8916 {
8917 long indx = 0;
8918
8919 if (ifunc != NULL)
8920 {
8921 /* If we get here when building a static
8922 executable, then the libc startup function
8923 responsible for applying indirect function
8924 relocations is going to complain about
8925 the reloc type.
8926 If we get here when building a dynamic
8927 executable, it will be because we have
8928 a text relocation. The dynamic loader
8929 will set the text segment writable and
8930 non-executable to apply text relocations.
8931 So we'll segfault when trying to run the
8932 indirection function to resolve the reloc. */
8933 info->callbacks->einfo
8934 /* xgettext:c-format */
8935 (_("%P: %H: relocation %s for indirect "
8936 "function %s unsupported\n"),
8937 input_bfd, input_section, rel->r_offset,
8938 howto->name,
8939 sym_name);
8940 ret = FALSE;
8941 }
8942 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8943 ;
8944 else if (sec == NULL || sec->owner == NULL)
8945 {
8946 bfd_set_error (bfd_error_bad_value);
8947 ret = FALSE;
8948 }
8949 else
8950 {
8951 asection *osec;
8952
8953 /* We are turning this relocation into one
8954 against a section symbol. It would be
8955 proper to subtract the symbol's value,
8956 osec->vma, from the emitted reloc addend,
8957 but ld.so expects buggy relocs.
8958 FIXME: Why not always use a zero index? */
8959 osec = sec->output_section;
8960 indx = elf_section_data (osec)->dynindx;
8961 if (indx == 0)
8962 {
8963 osec = htab->elf.text_index_section;
8964 indx = elf_section_data (osec)->dynindx;
8965 }
8966 BFD_ASSERT (indx != 0);
8967 #ifdef DEBUG
8968 if (indx == 0)
8969 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8970 indx, osec->name, osec->flags,
8971 h->root.root.string);
8972 #endif
8973 }
8974
8975 outrel.r_info = ELF32_R_INFO (indx, r_type);
8976 }
8977 else if (ifunc != NULL)
8978 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8979 else
8980 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8981 }
8982
8983 loc = sreloc->contents;
8984 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8985 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8986
8987 if (skip == -1)
8988 goto copy_reloc;
8989
8990 /* This reloc will be computed at runtime. We clear the memory
8991 so that it contains predictable value. */
8992 if (! skip
8993 && ((input_section->flags & SEC_ALLOC) != 0
8994 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8995 {
8996 relocation = howto->pc_relative ? outrel.r_offset : 0;
8997 addend = 0;
8998 break;
8999 }
9000 }
9001 break;
9002
9003 case R_PPC_RELAX_PLT:
9004 case R_PPC_RELAX_PLTREL24:
9005 if (h != NULL)
9006 {
9007 struct plt_entry *ent;
9008 bfd_vma got2_addend = 0;
9009
9010 if (r_type == R_PPC_RELAX_PLTREL24)
9011 {
9012 if (bfd_link_pic (info))
9013 got2_addend = addend;
9014 addend = 0;
9015 }
9016 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9017 if (htab->plt_type == PLT_NEW)
9018 relocation = (htab->glink->output_section->vma
9019 + htab->glink->output_offset
9020 + ent->glink_offset);
9021 else
9022 relocation = (htab->elf.splt->output_section->vma
9023 + htab->elf.splt->output_offset
9024 + ent->plt.offset);
9025 }
9026 /* Fall through. */
9027
9028 case R_PPC_RELAX:
9029 {
9030 const int *stub;
9031 size_t size;
9032 size_t insn_offset = rel->r_offset;
9033 unsigned int insn;
9034
9035 if (bfd_link_pic (info))
9036 {
9037 relocation -= (input_section->output_section->vma
9038 + input_section->output_offset
9039 + rel->r_offset - 4);
9040 stub = shared_stub_entry;
9041 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9042 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9043 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9044 stub += 3;
9045 size = ARRAY_SIZE (shared_stub_entry) - 3;
9046 }
9047 else
9048 {
9049 stub = stub_entry;
9050 size = ARRAY_SIZE (stub_entry);
9051 }
9052
9053 relocation += addend;
9054 if (bfd_link_relocatable (info))
9055 relocation = 0;
9056
9057 /* First insn is HA, second is LO. */
9058 insn = *stub++;
9059 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9060 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9061 insn_offset += 4;
9062
9063 insn = *stub++;
9064 insn |= relocation & 0xffff;
9065 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9066 insn_offset += 4;
9067 size -= 2;
9068
9069 while (size != 0)
9070 {
9071 insn = *stub++;
9072 --size;
9073 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9074 insn_offset += 4;
9075 }
9076
9077 /* Rewrite the reloc and convert one of the trailing nop
9078 relocs to describe this relocation. */
9079 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9080 /* The relocs are at the bottom 2 bytes */
9081 wrel->r_offset = rel->r_offset + d_offset;
9082 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9083 wrel->r_addend = rel->r_addend;
9084 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9085 wrel++, rel++;
9086 wrel->r_offset += 4;
9087 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9088 }
9089 continue;
9090
9091 /* Indirect .sdata relocation. */
9092 case R_PPC_EMB_SDAI16:
9093 BFD_ASSERT (htab->sdata[0].section != NULL);
9094 if (!is_static_defined (htab->sdata[0].sym))
9095 {
9096 unresolved_reloc = TRUE;
9097 break;
9098 }
9099 relocation
9100 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9101 h, relocation, rel);
9102 addend = 0;
9103 break;
9104
9105 /* Indirect .sdata2 relocation. */
9106 case R_PPC_EMB_SDA2I16:
9107 BFD_ASSERT (htab->sdata[1].section != NULL);
9108 if (!is_static_defined (htab->sdata[1].sym))
9109 {
9110 unresolved_reloc = TRUE;
9111 break;
9112 }
9113 relocation
9114 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9115 h, relocation, rel);
9116 addend = 0;
9117 break;
9118
9119 /* Handle the TOC16 reloc. We want to use the offset within the .got
9120 section, not the actual VMA. This is appropriate when generating
9121 an embedded ELF object, for which the .got section acts like the
9122 AIX .toc section. */
9123 case R_PPC_TOC16: /* phony GOT16 relocations */
9124 if (sec == NULL || sec->output_section == NULL)
9125 {
9126 unresolved_reloc = TRUE;
9127 break;
9128 }
9129 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9130 ".got") == 0
9131 || strcmp (bfd_get_section_name (sec->owner, sec),
9132 ".cgot") == 0);
9133
9134 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9135 break;
9136
9137 case R_PPC_PLTREL24:
9138 if (h != NULL && ifunc == NULL)
9139 {
9140 struct plt_entry *ent;
9141
9142 ent = find_plt_ent (&h->plt.plist, got2,
9143 bfd_link_pic (info) ? addend : 0);
9144 if (ent == NULL
9145 || htab->elf.splt == NULL)
9146 {
9147 /* We didn't make a PLT entry for this symbol. This
9148 happens when statically linking PIC code, or when
9149 using -Bsymbolic. */
9150 }
9151 else
9152 {
9153 /* Relocation is to the entry for this symbol in the
9154 procedure linkage table. */
9155 unresolved_reloc = FALSE;
9156 if (htab->plt_type == PLT_NEW)
9157 relocation = (htab->glink->output_section->vma
9158 + htab->glink->output_offset
9159 + ent->glink_offset);
9160 else
9161 relocation = (htab->elf.splt->output_section->vma
9162 + htab->elf.splt->output_offset
9163 + ent->plt.offset);
9164 }
9165 }
9166
9167 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9168 addend specifies the GOT pointer offset within .got2.
9169 Don't apply it to the relocation field. */
9170 addend = 0;
9171 break;
9172
9173 /* Relocate against _SDA_BASE_. */
9174 case R_PPC_SDAREL16:
9175 {
9176 const char *name;
9177 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9178
9179 if (sec == NULL
9180 || sec->output_section == NULL
9181 || !is_static_defined (sda))
9182 {
9183 unresolved_reloc = TRUE;
9184 break;
9185 }
9186 addend -= SYM_VAL (sda);
9187
9188 name = bfd_get_section_name (output_bfd, sec->output_section);
9189 if (!(strcmp (name, ".sdata") == 0
9190 || strcmp (name, ".sbss") == 0))
9191 {
9192 info->callbacks->einfo
9193 /* xgettext:c-format */
9194 (_("%P: %B: the target (%s) of a %s relocation is "
9195 "in the wrong output section (%s)\n"),
9196 input_bfd,
9197 sym_name,
9198 howto->name,
9199 name);
9200 }
9201 }
9202 break;
9203
9204 /* Relocate against _SDA2_BASE_. */
9205 case R_PPC_EMB_SDA2REL:
9206 {
9207 const char *name;
9208 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9209
9210 if (sec == NULL
9211 || sec->output_section == NULL
9212 || !is_static_defined (sda))
9213 {
9214 unresolved_reloc = TRUE;
9215 break;
9216 }
9217 addend -= SYM_VAL (sda);
9218
9219 name = bfd_get_section_name (output_bfd, sec->output_section);
9220 if (!(strcmp (name, ".sdata2") == 0
9221 || strcmp (name, ".sbss2") == 0))
9222 {
9223 info->callbacks->einfo
9224 /* xgettext:c-format */
9225 (_("%P: %B: the target (%s) of a %s relocation is "
9226 "in the wrong output section (%s)\n"),
9227 input_bfd,
9228 sym_name,
9229 howto->name,
9230 name);
9231 }
9232 }
9233 break;
9234
9235 case R_PPC_VLE_LO16A:
9236 relocation = relocation + addend;
9237 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9238 contents + rel->r_offset, relocation,
9239 split16a_type, htab->params->vle_reloc_fixup);
9240 goto copy_reloc;
9241
9242 case R_PPC_VLE_LO16D:
9243 relocation = relocation + addend;
9244 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9245 contents + rel->r_offset, relocation,
9246 split16d_type, htab->params->vle_reloc_fixup);
9247 goto copy_reloc;
9248
9249 case R_PPC_VLE_HI16A:
9250 relocation = (relocation + addend) >> 16;
9251 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9252 contents + rel->r_offset, relocation,
9253 split16a_type, htab->params->vle_reloc_fixup);
9254 goto copy_reloc;
9255
9256 case R_PPC_VLE_HI16D:
9257 relocation = (relocation + addend) >> 16;
9258 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9259 contents + rel->r_offset, relocation,
9260 split16d_type, htab->params->vle_reloc_fixup);
9261 goto copy_reloc;
9262
9263 case R_PPC_VLE_HA16A:
9264 relocation = (relocation + addend + 0x8000) >> 16;
9265 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9266 contents + rel->r_offset, relocation,
9267 split16a_type, htab->params->vle_reloc_fixup);
9268 goto copy_reloc;
9269
9270 case R_PPC_VLE_HA16D:
9271 relocation = (relocation + addend + 0x8000) >> 16;
9272 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9273 contents + rel->r_offset, relocation,
9274 split16d_type, htab->params->vle_reloc_fixup);
9275 goto copy_reloc;
9276
9277 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9278 case R_PPC_EMB_SDA21:
9279 case R_PPC_VLE_SDA21:
9280 case R_PPC_EMB_RELSDA:
9281 case R_PPC_VLE_SDA21_LO:
9282 {
9283 const char *name;
9284 int reg;
9285 unsigned int insn;
9286 struct elf_link_hash_entry *sda = NULL;
9287
9288 if (sec == NULL || sec->output_section == NULL)
9289 {
9290 unresolved_reloc = TRUE;
9291 break;
9292 }
9293
9294 name = bfd_get_section_name (output_bfd, sec->output_section);
9295 if (strcmp (name, ".sdata") == 0
9296 || strcmp (name, ".sbss") == 0)
9297 {
9298 reg = 13;
9299 sda = htab->sdata[0].sym;
9300 }
9301 else if (strcmp (name, ".sdata2") == 0
9302 || strcmp (name, ".sbss2") == 0)
9303 {
9304 reg = 2;
9305 sda = htab->sdata[1].sym;
9306 }
9307 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9308 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9309 {
9310 reg = 0;
9311 }
9312 else
9313 {
9314 info->callbacks->einfo
9315 /* xgettext:c-format */
9316 (_("%P: %B: the target (%s) of a %s relocation is "
9317 "in the wrong output section (%s)\n"),
9318 input_bfd,
9319 sym_name,
9320 howto->name,
9321 name);
9322
9323 bfd_set_error (bfd_error_bad_value);
9324 ret = FALSE;
9325 goto copy_reloc;
9326 }
9327
9328 if (sda != NULL)
9329 {
9330 if (!is_static_defined (sda))
9331 {
9332 unresolved_reloc = TRUE;
9333 break;
9334 }
9335 addend -= SYM_VAL (sda);
9336 }
9337
9338 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9339 if (reg == 0
9340 && (r_type == R_PPC_VLE_SDA21
9341 || r_type == R_PPC_VLE_SDA21_LO))
9342 {
9343 relocation = relocation + addend;
9344 addend = 0;
9345
9346 /* Force e_li insn, keeping RT from original insn. */
9347 insn &= 0x1f << 21;
9348 insn |= 28u << 26;
9349
9350 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9351 /* Top 4 bits of value to 17..20. */
9352 insn |= (relocation & 0xf0000) >> 5;
9353 /* Next 5 bits of the value to 11..15. */
9354 insn |= (relocation & 0xf800) << 5;
9355 /* And the final 11 bits of the value to bits 21 to 31. */
9356 insn |= relocation & 0x7ff;
9357
9358 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9359
9360 if (r_type == R_PPC_VLE_SDA21
9361 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9362 goto overflow;
9363 goto copy_reloc;
9364 }
9365 else if (r_type == R_PPC_EMB_SDA21
9366 || r_type == R_PPC_VLE_SDA21
9367 || r_type == R_PPC_VLE_SDA21_LO)
9368 {
9369 /* Fill in register field. */
9370 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9371 }
9372 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9373 }
9374 break;
9375
9376 case R_PPC_VLE_SDAREL_LO16A:
9377 case R_PPC_VLE_SDAREL_LO16D:
9378 case R_PPC_VLE_SDAREL_HI16A:
9379 case R_PPC_VLE_SDAREL_HI16D:
9380 case R_PPC_VLE_SDAREL_HA16A:
9381 case R_PPC_VLE_SDAREL_HA16D:
9382 {
9383 bfd_vma value;
9384 const char *name;
9385 //int reg;
9386 struct elf_link_hash_entry *sda = NULL;
9387
9388 if (sec == NULL || sec->output_section == NULL)
9389 {
9390 unresolved_reloc = TRUE;
9391 break;
9392 }
9393
9394 name = bfd_get_section_name (output_bfd, sec->output_section);
9395 if (strcmp (name, ".sdata") == 0
9396 || strcmp (name, ".sbss") == 0)
9397 {
9398 //reg = 13;
9399 sda = htab->sdata[0].sym;
9400 }
9401 else if (strcmp (name, ".sdata2") == 0
9402 || strcmp (name, ".sbss2") == 0)
9403 {
9404 //reg = 2;
9405 sda = htab->sdata[1].sym;
9406 }
9407 else
9408 {
9409 _bfd_error_handler
9410 /* xgettext:c-format */
9411 (_("%B: the target (%s) of a %s relocation is "
9412 "in the wrong output section (%s)"),
9413 input_bfd,
9414 sym_name,
9415 howto->name,
9416 name);
9417
9418 bfd_set_error (bfd_error_bad_value);
9419 ret = FALSE;
9420 goto copy_reloc;
9421 }
9422
9423 if (sda != NULL)
9424 {
9425 if (!is_static_defined (sda))
9426 {
9427 unresolved_reloc = TRUE;
9428 break;
9429 }
9430 }
9431
9432 value = (sda->root.u.def.section->output_section->vma
9433 + sda->root.u.def.section->output_offset
9434 + addend);
9435
9436 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9437 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9438 contents + rel->r_offset, value,
9439 split16a_type,
9440 htab->params->vle_reloc_fixup);
9441 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9442 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9443 contents + rel->r_offset, value,
9444 split16d_type,
9445 htab->params->vle_reloc_fixup);
9446 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9447 {
9448 value = value >> 16;
9449 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9450 contents + rel->r_offset, value,
9451 split16a_type,
9452 htab->params->vle_reloc_fixup);
9453 }
9454 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9455 {
9456 value = value >> 16;
9457 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9458 contents + rel->r_offset, value,
9459 split16d_type,
9460 htab->params->vle_reloc_fixup);
9461 }
9462 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9463 {
9464 value = (value + 0x8000) >> 16;
9465 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9466 contents + rel->r_offset, value,
9467 split16a_type,
9468 htab->params->vle_reloc_fixup);
9469 }
9470 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9471 {
9472 value = (value + 0x8000) >> 16;
9473 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9474 contents + rel->r_offset, value,
9475 split16d_type,
9476 htab->params->vle_reloc_fixup);
9477 }
9478 }
9479 goto copy_reloc;
9480
9481 /* Relocate against the beginning of the section. */
9482 case R_PPC_SECTOFF:
9483 case R_PPC_SECTOFF_LO:
9484 case R_PPC_SECTOFF_HI:
9485 case R_PPC_SECTOFF_HA:
9486 if (sec == NULL || sec->output_section == NULL)
9487 {
9488 unresolved_reloc = TRUE;
9489 break;
9490 }
9491 addend -= sec->output_section->vma;
9492 break;
9493
9494 /* Negative relocations. */
9495 case R_PPC_EMB_NADDR32:
9496 case R_PPC_EMB_NADDR16:
9497 case R_PPC_EMB_NADDR16_LO:
9498 case R_PPC_EMB_NADDR16_HI:
9499 case R_PPC_EMB_NADDR16_HA:
9500 addend -= 2 * relocation;
9501 break;
9502
9503 case R_PPC_COPY:
9504 case R_PPC_GLOB_DAT:
9505 case R_PPC_JMP_SLOT:
9506 case R_PPC_RELATIVE:
9507 case R_PPC_IRELATIVE:
9508 case R_PPC_PLT32:
9509 case R_PPC_PLTREL32:
9510 case R_PPC_PLT16_LO:
9511 case R_PPC_PLT16_HI:
9512 case R_PPC_PLT16_HA:
9513 case R_PPC_ADDR30:
9514 case R_PPC_EMB_RELSEC16:
9515 case R_PPC_EMB_RELST_LO:
9516 case R_PPC_EMB_RELST_HI:
9517 case R_PPC_EMB_RELST_HA:
9518 case R_PPC_EMB_BIT_FLD:
9519 info->callbacks->einfo
9520 /* xgettext:c-format */
9521 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9522 input_bfd,
9523 howto->name,
9524 sym_name);
9525
9526 bfd_set_error (bfd_error_invalid_operation);
9527 ret = FALSE;
9528 goto copy_reloc;
9529 }
9530
9531 /* Do any further special processing. */
9532 switch (r_type)
9533 {
9534 default:
9535 break;
9536
9537 case R_PPC_ADDR16_HA:
9538 case R_PPC_REL16_HA:
9539 case R_PPC_REL16DX_HA:
9540 case R_PPC_SECTOFF_HA:
9541 case R_PPC_TPREL16_HA:
9542 case R_PPC_DTPREL16_HA:
9543 case R_PPC_EMB_NADDR16_HA:
9544 case R_PPC_EMB_RELST_HA:
9545 /* It's just possible that this symbol is a weak symbol
9546 that's not actually defined anywhere. In that case,
9547 'sec' would be NULL, and we should leave the symbol
9548 alone (it will be set to zero elsewhere in the link). */
9549 if (sec == NULL)
9550 break;
9551 /* Fall through. */
9552
9553 case R_PPC_PLT16_HA:
9554 case R_PPC_GOT16_HA:
9555 case R_PPC_GOT_TLSGD16_HA:
9556 case R_PPC_GOT_TLSLD16_HA:
9557 case R_PPC_GOT_TPREL16_HA:
9558 case R_PPC_GOT_DTPREL16_HA:
9559 /* Add 0x10000 if sign bit in 0:15 is set.
9560 Bits 0:15 are not used. */
9561 addend += 0x8000;
9562 break;
9563
9564 case R_PPC_ADDR16:
9565 case R_PPC_ADDR16_LO:
9566 case R_PPC_GOT16:
9567 case R_PPC_GOT16_LO:
9568 case R_PPC_SDAREL16:
9569 case R_PPC_SECTOFF:
9570 case R_PPC_SECTOFF_LO:
9571 case R_PPC_DTPREL16:
9572 case R_PPC_DTPREL16_LO:
9573 case R_PPC_TPREL16:
9574 case R_PPC_TPREL16_LO:
9575 case R_PPC_GOT_TLSGD16:
9576 case R_PPC_GOT_TLSGD16_LO:
9577 case R_PPC_GOT_TLSLD16:
9578 case R_PPC_GOT_TLSLD16_LO:
9579 case R_PPC_GOT_DTPREL16:
9580 case R_PPC_GOT_DTPREL16_LO:
9581 case R_PPC_GOT_TPREL16:
9582 case R_PPC_GOT_TPREL16_LO:
9583 {
9584 /* The 32-bit ABI lacks proper relocations to deal with
9585 certain 64-bit instructions. Prevent damage to bits
9586 that make up part of the insn opcode. */
9587 unsigned int insn, mask, lobit;
9588
9589 insn = bfd_get_32 (input_bfd,
9590 contents + rel->r_offset - d_offset);
9591 mask = 0;
9592 if (is_insn_ds_form (insn))
9593 mask = 3;
9594 else if (is_insn_dq_form (insn))
9595 mask = 15;
9596 else
9597 break;
9598 relocation += addend;
9599 addend = insn & mask;
9600 lobit = mask & relocation;
9601 if (lobit != 0)
9602 {
9603 relocation ^= lobit;
9604 info->callbacks->einfo
9605 /* xgettext:c-format */
9606 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9607 input_bfd, input_section, rel->r_offset,
9608 howto->name, sym_name, mask + 1);
9609 bfd_set_error (bfd_error_bad_value);
9610 ret = FALSE;
9611 }
9612 }
9613 break;
9614 }
9615
9616 #ifdef DEBUG
9617 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9618 "offset = %ld, addend = %ld\n",
9619 howto->name,
9620 (int) r_type,
9621 sym_name,
9622 r_symndx,
9623 (long) rel->r_offset,
9624 (long) addend);
9625 #endif
9626
9627 if (unresolved_reloc
9628 && !((input_section->flags & SEC_DEBUGGING) != 0
9629 && h->def_dynamic)
9630 && _bfd_elf_section_offset (output_bfd, info, input_section,
9631 rel->r_offset) != (bfd_vma) -1)
9632 {
9633 info->callbacks->einfo
9634 /* xgettext:c-format */
9635 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9636 input_bfd, input_section, rel->r_offset,
9637 howto->name,
9638 sym_name);
9639 ret = FALSE;
9640 }
9641
9642 /* 16-bit fields in insns mostly have signed values, but a
9643 few insns have 16-bit unsigned values. Really, we should
9644 have different reloc types. */
9645 if (howto->complain_on_overflow != complain_overflow_dont
9646 && howto->dst_mask == 0xffff
9647 && (input_section->flags & SEC_CODE) != 0)
9648 {
9649 enum complain_overflow complain = complain_overflow_signed;
9650
9651 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9652 {
9653 unsigned int insn;
9654
9655 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9656 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9657 complain = complain_overflow_bitfield;
9658 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9659 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9660 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9661 complain = complain_overflow_unsigned;
9662 }
9663 if (howto->complain_on_overflow != complain)
9664 {
9665 alt_howto = *howto;
9666 alt_howto.complain_on_overflow = complain;
9667 howto = &alt_howto;
9668 }
9669 }
9670
9671 if (r_type == R_PPC_REL16DX_HA)
9672 {
9673 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9674 if (rel->r_offset + 4 > input_section->size)
9675 r = bfd_reloc_outofrange;
9676 else
9677 {
9678 unsigned int insn;
9679
9680 relocation += addend;
9681 relocation -= (rel->r_offset
9682 + input_section->output_offset
9683 + input_section->output_section->vma);
9684 relocation >>= 16;
9685 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9686 insn &= ~0x1fffc1;
9687 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9688 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9689 r = bfd_reloc_ok;
9690 }
9691 }
9692 else
9693 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9694 rel->r_offset, relocation, addend);
9695
9696 if (r != bfd_reloc_ok)
9697 {
9698 if (r == bfd_reloc_overflow)
9699 {
9700 overflow:
9701 /* On code like "if (foo) foo();" don't report overflow
9702 on a branch to zero when foo is undefined. */
9703 if (!warned
9704 && !(h != NULL
9705 && (h->root.type == bfd_link_hash_undefweak
9706 || h->root.type == bfd_link_hash_undefined)
9707 && is_branch_reloc (r_type)))
9708 info->callbacks->reloc_overflow
9709 (info, (h ? &h->root : NULL), sym_name, howto->name,
9710 rel->r_addend, input_bfd, input_section, rel->r_offset);
9711 }
9712 else
9713 {
9714 info->callbacks->einfo
9715 /* xgettext:c-format */
9716 (_("%P: %H: %s reloc against `%s': error %d\n"),
9717 input_bfd, input_section, rel->r_offset,
9718 howto->name, sym_name, (int) r);
9719 ret = FALSE;
9720 }
9721 }
9722 copy_reloc:
9723 if (wrel != rel)
9724 *wrel = *rel;
9725 }
9726
9727 if (wrel != rel)
9728 {
9729 Elf_Internal_Shdr *rel_hdr;
9730 size_t deleted = rel - wrel;
9731
9732 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9733 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9734 if (rel_hdr->sh_size == 0)
9735 {
9736 /* It is too late to remove an empty reloc section. Leave
9737 one NONE reloc.
9738 ??? What is wrong with an empty section??? */
9739 rel_hdr->sh_size = rel_hdr->sh_entsize;
9740 deleted -= 1;
9741 wrel++;
9742 }
9743 relend = wrel;
9744 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9745 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9746 input_section->reloc_count -= deleted;
9747 }
9748
9749 #ifdef DEBUG
9750 fprintf (stderr, "\n");
9751 #endif
9752
9753 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9754 && input_section->size != input_section->rawsize
9755 && (strcmp (input_section->output_section->name, ".init") == 0
9756 || strcmp (input_section->output_section->name, ".fini") == 0))
9757 {
9758 /* Branch around the trampolines. */
9759 unsigned int insn = B + input_section->size - input_section->rawsize;
9760 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9761 }
9762
9763 if (htab->params->ppc476_workaround
9764 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9765 && (!bfd_link_relocatable (info)
9766 || (input_section->output_section->alignment_power
9767 >= htab->params->pagesize_p2)))
9768 {
9769 bfd_vma start_addr, end_addr, addr;
9770 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9771
9772 if (relax_info->workaround_size != 0)
9773 {
9774 bfd_byte *p;
9775 unsigned int n;
9776 bfd_byte fill[4];
9777
9778 bfd_put_32 (input_bfd, BA, fill);
9779 p = contents + input_section->size - relax_info->workaround_size;
9780 n = relax_info->workaround_size >> 2;
9781 while (n--)
9782 {
9783 memcpy (p, fill, 4);
9784 p += 4;
9785 }
9786 }
9787
9788 /* The idea is: Replace the last instruction on a page with a
9789 branch to a patch area. Put the insn there followed by a
9790 branch back to the next page. Complicated a little by
9791 needing to handle moved conditional branches, and by not
9792 wanting to touch data-in-text. */
9793
9794 start_addr = (input_section->output_section->vma
9795 + input_section->output_offset);
9796 end_addr = (start_addr + input_section->size
9797 - relax_info->workaround_size);
9798 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9799 addr < end_addr;
9800 addr += pagesize)
9801 {
9802 bfd_vma offset = addr - start_addr;
9803 Elf_Internal_Rela *lo, *hi;
9804 bfd_boolean is_data;
9805 bfd_vma patch_off, patch_addr;
9806 unsigned int insn;
9807
9808 /* Do we have a data reloc at this offset? If so, leave
9809 the word alone. */
9810 is_data = FALSE;
9811 lo = relocs;
9812 hi = relend;
9813 rel = NULL;
9814 while (lo < hi)
9815 {
9816 rel = lo + (hi - lo) / 2;
9817 if (rel->r_offset < offset)
9818 lo = rel + 1;
9819 else if (rel->r_offset > offset + 3)
9820 hi = rel;
9821 else
9822 {
9823 switch (ELF32_R_TYPE (rel->r_info))
9824 {
9825 case R_PPC_ADDR32:
9826 case R_PPC_UADDR32:
9827 case R_PPC_REL32:
9828 case R_PPC_ADDR30:
9829 is_data = TRUE;
9830 break;
9831 default:
9832 break;
9833 }
9834 break;
9835 }
9836 }
9837 if (is_data)
9838 continue;
9839
9840 /* Some instructions can be left alone too. Unconditional
9841 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9842 avoid the icache failure.
9843
9844 The problem occurs due to prefetch across a page boundary
9845 where stale instructions can be fetched from the next
9846 page, and the mechanism for flushing these bad
9847 instructions fails under certain circumstances. The
9848 unconditional branches:
9849 1) Branch: b, bl, ba, bla,
9850 2) Branch Conditional: bc, bca, bcl, bcla,
9851 3) Branch Conditional to Link Register: bclr, bclrl,
9852 where (2) and (3) have BO=0x14 making them unconditional,
9853 prevent the bad prefetch because the prefetch itself is
9854 affected by these instructions. This happens even if the
9855 instruction is not executed.
9856
9857 A bctr example:
9858 .
9859 . lis 9,new_page@ha
9860 . addi 9,9,new_page@l
9861 . mtctr 9
9862 . bctr
9863 . nop
9864 . nop
9865 . new_page:
9866 .
9867 The bctr is not predicted taken due to ctr not being
9868 ready, so prefetch continues on past the bctr into the
9869 new page which might have stale instructions. If they
9870 fail to be flushed, then they will be executed after the
9871 bctr executes. Either of the following modifications
9872 prevent the bad prefetch from happening in the first
9873 place:
9874 .
9875 . lis 9,new_page@ha lis 9,new_page@ha
9876 . addi 9,9,new_page@l addi 9,9,new_page@l
9877 . mtctr 9 mtctr 9
9878 . bctr bctr
9879 . nop b somewhere_else
9880 . b somewhere_else nop
9881 . new_page: new_page:
9882 . */
9883 insn = bfd_get_32 (input_bfd, contents + offset);
9884 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9885 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9886 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9887 || ((insn & (0x3f << 26)) == (19u << 26)
9888 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9889 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9890 continue;
9891
9892 patch_addr = (start_addr + input_section->size
9893 - relax_info->workaround_size);
9894 patch_addr = (patch_addr + 15) & -16;
9895 patch_off = patch_addr - start_addr;
9896 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9897
9898 if (rel != NULL
9899 && rel->r_offset >= offset
9900 && rel->r_offset < offset + 4)
9901 {
9902 asection *sreloc;
9903
9904 /* If the insn we are patching had a reloc, adjust the
9905 reloc r_offset so that the reloc applies to the moved
9906 location. This matters for -r and --emit-relocs. */
9907 if (rel + 1 != relend)
9908 {
9909 Elf_Internal_Rela tmp = *rel;
9910
9911 /* Keep the relocs sorted by r_offset. */
9912 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9913 relend[-1] = tmp;
9914 }
9915 relend[-1].r_offset += patch_off - offset;
9916
9917 /* Adjust REL16 addends too. */
9918 switch (ELF32_R_TYPE (relend[-1].r_info))
9919 {
9920 case R_PPC_REL16:
9921 case R_PPC_REL16_LO:
9922 case R_PPC_REL16_HI:
9923 case R_PPC_REL16_HA:
9924 relend[-1].r_addend += patch_off - offset;
9925 break;
9926 default:
9927 break;
9928 }
9929
9930 /* If we are building a PIE or shared library with
9931 non-PIC objects, perhaps we had a dynamic reloc too?
9932 If so, the dynamic reloc must move with the insn. */
9933 sreloc = elf_section_data (input_section)->sreloc;
9934 if (sreloc != NULL)
9935 {
9936 Elf32_External_Rela *slo, *shi, *srelend;
9937 bfd_vma soffset;
9938
9939 slo = (Elf32_External_Rela *) sreloc->contents;
9940 shi = srelend = slo + sreloc->reloc_count;
9941 soffset = (offset + input_section->output_section->vma
9942 + input_section->output_offset);
9943 while (slo < shi)
9944 {
9945 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9946 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9947 &outrel);
9948 if (outrel.r_offset < soffset)
9949 slo = srel + 1;
9950 else if (outrel.r_offset > soffset + 3)
9951 shi = srel;
9952 else
9953 {
9954 if (srel + 1 != srelend)
9955 {
9956 memmove (srel, srel + 1,
9957 (srelend - (srel + 1)) * sizeof (*srel));
9958 srel = srelend - 1;
9959 }
9960 outrel.r_offset += patch_off - offset;
9961 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9962 (bfd_byte *) srel);
9963 break;
9964 }
9965 }
9966 }
9967 }
9968 else
9969 rel = NULL;
9970
9971 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9972 && (insn & 2) == 0 /* relative */)
9973 {
9974 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9975
9976 delta += offset - patch_off;
9977 if (bfd_link_relocatable (info) && rel != NULL)
9978 delta = 0;
9979 if (!bfd_link_relocatable (info) && rel != NULL)
9980 {
9981 enum elf_ppc_reloc_type r_type;
9982
9983 r_type = ELF32_R_TYPE (relend[-1].r_info);
9984 if (r_type == R_PPC_REL14_BRTAKEN)
9985 insn |= BRANCH_PREDICT_BIT;
9986 else if (r_type == R_PPC_REL14_BRNTAKEN)
9987 insn &= ~BRANCH_PREDICT_BIT;
9988 else
9989 BFD_ASSERT (r_type == R_PPC_REL14);
9990
9991 if ((r_type == R_PPC_REL14_BRTAKEN
9992 || r_type == R_PPC_REL14_BRNTAKEN)
9993 && delta + 0x8000 < 0x10000
9994 && (bfd_signed_vma) delta < 0)
9995 insn ^= BRANCH_PREDICT_BIT;
9996 }
9997 if (delta + 0x8000 < 0x10000)
9998 {
9999 bfd_put_32 (input_bfd,
10000 (insn & ~0xfffc) | (delta & 0xfffc),
10001 contents + patch_off);
10002 patch_off += 4;
10003 bfd_put_32 (input_bfd,
10004 B | ((offset + 4 - patch_off) & 0x3fffffc),
10005 contents + patch_off);
10006 patch_off += 4;
10007 }
10008 else
10009 {
10010 if (rel != NULL)
10011 {
10012 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10013
10014 relend[-1].r_offset += 8;
10015 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10016 }
10017 bfd_put_32 (input_bfd,
10018 (insn & ~0xfffc) | 8,
10019 contents + patch_off);
10020 patch_off += 4;
10021 bfd_put_32 (input_bfd,
10022 B | ((offset + 4 - patch_off) & 0x3fffffc),
10023 contents + patch_off);
10024 patch_off += 4;
10025 bfd_put_32 (input_bfd,
10026 B | ((delta - 8) & 0x3fffffc),
10027 contents + patch_off);
10028 patch_off += 4;
10029 }
10030 }
10031 else
10032 {
10033 bfd_put_32 (input_bfd, insn, contents + patch_off);
10034 patch_off += 4;
10035 bfd_put_32 (input_bfd,
10036 B | ((offset + 4 - patch_off) & 0x3fffffc),
10037 contents + patch_off);
10038 patch_off += 4;
10039 }
10040 BFD_ASSERT (patch_off <= input_section->size);
10041 relax_info->workaround_size = input_section->size - patch_off;
10042 }
10043 }
10044
10045 return ret;
10046 }
10047 \f
10048 /* Finish up dynamic symbol handling. We set the contents of various
10049 dynamic sections here. */
10050
10051 static bfd_boolean
10052 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10053 struct bfd_link_info *info,
10054 struct elf_link_hash_entry *h,
10055 Elf_Internal_Sym *sym)
10056 {
10057 struct ppc_elf_link_hash_table *htab;
10058 struct plt_entry *ent;
10059 bfd_boolean doneone;
10060
10061 #ifdef DEBUG
10062 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10063 h->root.root.string);
10064 #endif
10065
10066 htab = ppc_elf_hash_table (info);
10067 BFD_ASSERT (htab->elf.dynobj != NULL);
10068
10069 doneone = FALSE;
10070 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10071 if (ent->plt.offset != (bfd_vma) -1)
10072 {
10073 if (!doneone)
10074 {
10075 Elf_Internal_Rela rela;
10076 bfd_byte *loc;
10077 bfd_vma reloc_index;
10078
10079 if (htab->plt_type == PLT_NEW
10080 || !htab->elf.dynamic_sections_created
10081 || h->dynindx == -1)
10082 reloc_index = ent->plt.offset / 4;
10083 else
10084 {
10085 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10086 / htab->plt_slot_size);
10087 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10088 && htab->plt_type == PLT_OLD)
10089 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10090 }
10091
10092 /* This symbol has an entry in the procedure linkage table.
10093 Set it up. */
10094 if (htab->plt_type == PLT_VXWORKS
10095 && htab->elf.dynamic_sections_created
10096 && h->dynindx != -1)
10097 {
10098 bfd_vma got_offset;
10099 const bfd_vma *plt_entry;
10100
10101 /* The first three entries in .got.plt are reserved. */
10102 got_offset = (reloc_index + 3) * 4;
10103
10104 /* Use the right PLT. */
10105 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10106 : ppc_elf_vxworks_plt_entry;
10107
10108 /* Fill in the .plt on VxWorks. */
10109 if (bfd_link_pic (info))
10110 {
10111 bfd_put_32 (output_bfd,
10112 plt_entry[0] | PPC_HA (got_offset),
10113 htab->elf.splt->contents + ent->plt.offset + 0);
10114 bfd_put_32 (output_bfd,
10115 plt_entry[1] | PPC_LO (got_offset),
10116 htab->elf.splt->contents + ent->plt.offset + 4);
10117 }
10118 else
10119 {
10120 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10121
10122 bfd_put_32 (output_bfd,
10123 plt_entry[0] | PPC_HA (got_loc),
10124 htab->elf.splt->contents + ent->plt.offset + 0);
10125 bfd_put_32 (output_bfd,
10126 plt_entry[1] | PPC_LO (got_loc),
10127 htab->elf.splt->contents + ent->plt.offset + 4);
10128 }
10129
10130 bfd_put_32 (output_bfd, plt_entry[2],
10131 htab->elf.splt->contents + ent->plt.offset + 8);
10132 bfd_put_32 (output_bfd, plt_entry[3],
10133 htab->elf.splt->contents + ent->plt.offset + 12);
10134
10135 /* This instruction is an immediate load. The value loaded is
10136 the byte offset of the R_PPC_JMP_SLOT relocation from the
10137 start of the .rela.plt section. The value is stored in the
10138 low-order 16 bits of the load instruction. */
10139 /* NOTE: It appears that this is now an index rather than a
10140 prescaled offset. */
10141 bfd_put_32 (output_bfd,
10142 plt_entry[4] | reloc_index,
10143 htab->elf.splt->contents + ent->plt.offset + 16);
10144 /* This instruction is a PC-relative branch whose target is
10145 the start of the PLT section. The address of this branch
10146 instruction is 20 bytes beyond the start of this PLT entry.
10147 The address is encoded in bits 6-29, inclusive. The value
10148 stored is right-shifted by two bits, permitting a 26-bit
10149 offset. */
10150 bfd_put_32 (output_bfd,
10151 (plt_entry[5]
10152 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10153 htab->elf.splt->contents + ent->plt.offset + 20);
10154 bfd_put_32 (output_bfd, plt_entry[6],
10155 htab->elf.splt->contents + ent->plt.offset + 24);
10156 bfd_put_32 (output_bfd, plt_entry[7],
10157 htab->elf.splt->contents + ent->plt.offset + 28);
10158
10159 /* Fill in the GOT entry corresponding to this PLT slot with
10160 the address immediately after the "bctr" instruction
10161 in this PLT entry. */
10162 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10163 + htab->elf.splt->output_offset
10164 + ent->plt.offset + 16),
10165 htab->elf.sgotplt->contents + got_offset);
10166
10167 if (!bfd_link_pic (info))
10168 {
10169 /* Fill in a couple of entries in .rela.plt.unloaded. */
10170 loc = htab->srelplt2->contents
10171 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10172 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10173 * sizeof (Elf32_External_Rela));
10174
10175 /* Provide the @ha relocation for the first instruction. */
10176 rela.r_offset = (htab->elf.splt->output_section->vma
10177 + htab->elf.splt->output_offset
10178 + ent->plt.offset + 2);
10179 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10180 R_PPC_ADDR16_HA);
10181 rela.r_addend = got_offset;
10182 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10183 loc += sizeof (Elf32_External_Rela);
10184
10185 /* Provide the @l relocation for the second instruction. */
10186 rela.r_offset = (htab->elf.splt->output_section->vma
10187 + htab->elf.splt->output_offset
10188 + ent->plt.offset + 6);
10189 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10190 R_PPC_ADDR16_LO);
10191 rela.r_addend = got_offset;
10192 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10193 loc += sizeof (Elf32_External_Rela);
10194
10195 /* Provide a relocation for the GOT entry corresponding to this
10196 PLT slot. Point it at the middle of the .plt entry. */
10197 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10198 + htab->elf.sgotplt->output_offset
10199 + got_offset);
10200 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10201 R_PPC_ADDR32);
10202 rela.r_addend = ent->plt.offset + 16;
10203 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10204 }
10205
10206 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10207 In particular, the offset for the relocation is not the
10208 address of the PLT entry for this function, as specified
10209 by the ABI. Instead, the offset is set to the address of
10210 the GOT slot for this function. See EABI 4.4.4.1. */
10211 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10212 + htab->elf.sgotplt->output_offset
10213 + got_offset);
10214
10215 }
10216 else
10217 {
10218 asection *splt = htab->elf.splt;
10219 if (!htab->elf.dynamic_sections_created
10220 || h->dynindx == -1)
10221 splt = htab->elf.iplt;
10222
10223 rela.r_offset = (splt->output_section->vma
10224 + splt->output_offset
10225 + ent->plt.offset);
10226 if (htab->plt_type == PLT_OLD
10227 || !htab->elf.dynamic_sections_created
10228 || h->dynindx == -1)
10229 {
10230 /* We don't need to fill in the .plt. The ppc dynamic
10231 linker will fill it in. */
10232 }
10233 else
10234 {
10235 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10236 + htab->glink->output_section->vma
10237 + htab->glink->output_offset);
10238 bfd_put_32 (output_bfd, val,
10239 splt->contents + ent->plt.offset);
10240 }
10241 }
10242
10243 /* Fill in the entry in the .rela.plt section. */
10244 rela.r_addend = 0;
10245 if (!htab->elf.dynamic_sections_created
10246 || h->dynindx == -1)
10247 {
10248 BFD_ASSERT (h->type == STT_GNU_IFUNC
10249 && h->def_regular
10250 && (h->root.type == bfd_link_hash_defined
10251 || h->root.type == bfd_link_hash_defweak));
10252 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10253 rela.r_addend = SYM_VAL (h);
10254 }
10255 else
10256 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10257
10258 if (!htab->elf.dynamic_sections_created
10259 || h->dynindx == -1)
10260 loc = (htab->elf.irelplt->contents
10261 + (htab->elf.irelplt->reloc_count++
10262 * sizeof (Elf32_External_Rela)));
10263 else
10264 loc = (htab->elf.srelplt->contents
10265 + reloc_index * sizeof (Elf32_External_Rela));
10266 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10267
10268 if (!h->def_regular)
10269 {
10270 /* Mark the symbol as undefined, rather than as
10271 defined in the .plt section. Leave the value if
10272 there were any relocations where pointer equality
10273 matters (this is a clue for the dynamic linker, to
10274 make function pointer comparisons work between an
10275 application and shared library), otherwise set it
10276 to zero. */
10277 sym->st_shndx = SHN_UNDEF;
10278 if (!h->pointer_equality_needed)
10279 sym->st_value = 0;
10280 else if (!h->ref_regular_nonweak)
10281 {
10282 /* This breaks function pointer comparisons, but
10283 that is better than breaking tests for a NULL
10284 function pointer. */
10285 sym->st_value = 0;
10286 }
10287 }
10288 else if (h->type == STT_GNU_IFUNC
10289 && !bfd_link_pic (info))
10290 {
10291 /* Set the value of ifunc symbols in a non-pie
10292 executable to the glink entry. This is to avoid
10293 text relocations. We can't do this for ifunc in
10294 allocate_dynrelocs, as we do for normal dynamic
10295 function symbols with plt entries, because we need
10296 to keep the original value around for the ifunc
10297 relocation. */
10298 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10299 (output_bfd, htab->glink->output_section));
10300 sym->st_value = (ent->glink_offset
10301 + htab->glink->output_offset
10302 + htab->glink->output_section->vma);
10303 }
10304 doneone = TRUE;
10305 }
10306
10307 if (htab->plt_type == PLT_NEW
10308 || !htab->elf.dynamic_sections_created
10309 || h->dynindx == -1)
10310 {
10311 unsigned char *p;
10312 asection *splt = htab->elf.splt;
10313 if (!htab->elf.dynamic_sections_created
10314 || h->dynindx == -1)
10315 splt = htab->elf.iplt;
10316
10317 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10318
10319 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10320 {
10321 bfd_put_32 (output_bfd, LWZ_11_3, p);
10322 p += 4;
10323 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10324 p += 4;
10325 bfd_put_32 (output_bfd, MR_0_3, p);
10326 p += 4;
10327 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10328 p += 4;
10329 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10330 p += 4;
10331 bfd_put_32 (output_bfd, BEQLR, p);
10332 p += 4;
10333 bfd_put_32 (output_bfd, MR_3_0, p);
10334 p += 4;
10335 bfd_put_32 (output_bfd, NOP, p);
10336 p += 4;
10337 }
10338
10339 write_glink_stub (ent, splt, p, info);
10340
10341 if (!bfd_link_pic (info))
10342 /* We only need one non-PIC glink stub. */
10343 break;
10344 }
10345 else
10346 break;
10347 }
10348
10349 if (h->needs_copy)
10350 {
10351 asection *s;
10352 Elf_Internal_Rela rela;
10353 bfd_byte *loc;
10354
10355 /* This symbols needs a copy reloc. Set it up. */
10356
10357 #ifdef DEBUG
10358 fprintf (stderr, ", copy");
10359 #endif
10360
10361 BFD_ASSERT (h->dynindx != -1);
10362
10363 if (ppc_elf_hash_entry (h)->has_sda_refs)
10364 s = htab->relsbss;
10365 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
10366 s = htab->elf.sreldynrelro;
10367 else
10368 s = htab->elf.srelbss;
10369 BFD_ASSERT (s != NULL);
10370
10371 rela.r_offset = SYM_VAL (h);
10372 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10373 rela.r_addend = 0;
10374 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10375 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10376 }
10377
10378 #ifdef DEBUG
10379 fprintf (stderr, "\n");
10380 #endif
10381
10382 return TRUE;
10383 }
10384 \f
10385 static enum elf_reloc_type_class
10386 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10387 const asection *rel_sec,
10388 const Elf_Internal_Rela *rela)
10389 {
10390 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10391
10392 if (rel_sec == htab->elf.irelplt)
10393 return reloc_class_ifunc;
10394
10395 switch (ELF32_R_TYPE (rela->r_info))
10396 {
10397 case R_PPC_RELATIVE:
10398 return reloc_class_relative;
10399 case R_PPC_JMP_SLOT:
10400 return reloc_class_plt;
10401 case R_PPC_COPY:
10402 return reloc_class_copy;
10403 default:
10404 return reloc_class_normal;
10405 }
10406 }
10407 \f
10408 /* Finish up the dynamic sections. */
10409
10410 static bfd_boolean
10411 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10412 struct bfd_link_info *info)
10413 {
10414 asection *sdyn;
10415 asection *splt;
10416 struct ppc_elf_link_hash_table *htab;
10417 bfd_vma got;
10418 bfd *dynobj;
10419 bfd_boolean ret = TRUE;
10420
10421 #ifdef DEBUG
10422 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10423 #endif
10424
10425 htab = ppc_elf_hash_table (info);
10426 dynobj = htab->elf.dynobj;
10427 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10428 if (htab->is_vxworks)
10429 splt = htab->elf.splt;
10430 else
10431 splt = NULL;
10432
10433 got = 0;
10434 if (htab->elf.hgot != NULL)
10435 got = SYM_VAL (htab->elf.hgot);
10436
10437 if (htab->elf.dynamic_sections_created)
10438 {
10439 Elf32_External_Dyn *dyncon, *dynconend;
10440
10441 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10442
10443 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10444 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10445 for (; dyncon < dynconend; dyncon++)
10446 {
10447 Elf_Internal_Dyn dyn;
10448 asection *s;
10449
10450 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10451
10452 switch (dyn.d_tag)
10453 {
10454 case DT_PLTGOT:
10455 if (htab->is_vxworks)
10456 s = htab->elf.sgotplt;
10457 else
10458 s = htab->elf.splt;
10459 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10460 break;
10461
10462 case DT_PLTRELSZ:
10463 dyn.d_un.d_val = htab->elf.srelplt->size;
10464 break;
10465
10466 case DT_JMPREL:
10467 s = htab->elf.srelplt;
10468 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10469 break;
10470
10471 case DT_PPC_GOT:
10472 dyn.d_un.d_ptr = got;
10473 break;
10474
10475 default:
10476 if (htab->is_vxworks
10477 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10478 break;
10479 continue;
10480 }
10481
10482 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10483 }
10484 }
10485
10486 if (htab->elf.sgot != NULL)
10487 {
10488 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10489 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10490 {
10491 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10492
10493 p += htab->elf.hgot->root.u.def.value;
10494 if (htab->plt_type == PLT_OLD)
10495 {
10496 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10497 so that a function can easily find the address of
10498 _GLOBAL_OFFSET_TABLE_. */
10499 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10500 < htab->elf.hgot->root.u.def.section->size);
10501 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10502 }
10503
10504 if (sdyn != NULL)
10505 {
10506 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10507 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10508 < htab->elf.hgot->root.u.def.section->size);
10509 bfd_put_32 (output_bfd, val, p);
10510 }
10511 }
10512 else
10513 {
10514 /* xgettext:c-format */
10515 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10516 htab->elf.hgot->root.root.string,
10517 (htab->elf.sgotplt != NULL
10518 ? htab->elf.sgotplt->name
10519 : htab->elf.sgot->name));
10520 bfd_set_error (bfd_error_bad_value);
10521 ret = FALSE;
10522 }
10523
10524 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10525 }
10526
10527 /* Fill in the first entry in the VxWorks procedure linkage table. */
10528 if (splt && splt->size > 0)
10529 {
10530 /* Use the right PLT. */
10531 const bfd_vma *plt_entry = (bfd_link_pic (info)
10532 ? ppc_elf_vxworks_pic_plt0_entry
10533 : ppc_elf_vxworks_plt0_entry);
10534
10535 if (!bfd_link_pic (info))
10536 {
10537 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10538
10539 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10540 splt->contents + 0);
10541 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10542 splt->contents + 4);
10543 }
10544 else
10545 {
10546 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10547 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10548 }
10549 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10550 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10551 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10552 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10553 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10554 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10555
10556 if (! bfd_link_pic (info))
10557 {
10558 Elf_Internal_Rela rela;
10559 bfd_byte *loc;
10560
10561 loc = htab->srelplt2->contents;
10562
10563 /* Output the @ha relocation for the first instruction. */
10564 rela.r_offset = (htab->elf.splt->output_section->vma
10565 + htab->elf.splt->output_offset
10566 + 2);
10567 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10568 rela.r_addend = 0;
10569 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10570 loc += sizeof (Elf32_External_Rela);
10571
10572 /* Output the @l relocation for the second instruction. */
10573 rela.r_offset = (htab->elf.splt->output_section->vma
10574 + htab->elf.splt->output_offset
10575 + 6);
10576 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10577 rela.r_addend = 0;
10578 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10579 loc += sizeof (Elf32_External_Rela);
10580
10581 /* Fix up the remaining relocations. They may have the wrong
10582 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10583 in which symbols were output. */
10584 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10585 {
10586 Elf_Internal_Rela rel;
10587
10588 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10589 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10590 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10591 loc += sizeof (Elf32_External_Rela);
10592
10593 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10594 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10595 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10596 loc += sizeof (Elf32_External_Rela);
10597
10598 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10599 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10600 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10601 loc += sizeof (Elf32_External_Rela);
10602 }
10603 }
10604 }
10605
10606 if (htab->glink != NULL
10607 && htab->glink->contents != NULL
10608 && htab->elf.dynamic_sections_created)
10609 {
10610 unsigned char *p;
10611 unsigned char *endp;
10612 bfd_vma res0;
10613 unsigned int i;
10614
10615 /*
10616 * PIC glink code is the following:
10617 *
10618 * # ith PLT code stub.
10619 * addis 11,30,(plt+(i-1)*4-got)@ha
10620 * lwz 11,(plt+(i-1)*4-got)@l(11)
10621 * mtctr 11
10622 * bctr
10623 *
10624 * # A table of branches, one for each plt entry.
10625 * # The idea is that the plt call stub loads ctr and r11 with these
10626 * # addresses, so (r11 - res_0) gives the plt index * 4.
10627 * res_0: b PLTresolve
10628 * res_1: b PLTresolve
10629 * .
10630 * # Some number of entries towards the end can be nops
10631 * res_n_m3: nop
10632 * res_n_m2: nop
10633 * res_n_m1:
10634 *
10635 * PLTresolve:
10636 * addis 11,11,(1f-res_0)@ha
10637 * mflr 0
10638 * bcl 20,31,1f
10639 * 1: addi 11,11,(1b-res_0)@l
10640 * mflr 12
10641 * mtlr 0
10642 * sub 11,11,12 # r11 = index * 4
10643 * addis 12,12,(got+4-1b)@ha
10644 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10645 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10646 * mtctr 0
10647 * add 0,11,11
10648 * add 11,0,11 # r11 = index * 12 = reloc offset.
10649 * bctr
10650 */
10651 static const unsigned int pic_plt_resolve[] =
10652 {
10653 ADDIS_11_11,
10654 MFLR_0,
10655 BCL_20_31,
10656 ADDI_11_11,
10657 MFLR_12,
10658 MTLR_0,
10659 SUB_11_11_12,
10660 ADDIS_12_12,
10661 LWZ_0_12,
10662 LWZ_12_12,
10663 MTCTR_0,
10664 ADD_0_11_11,
10665 ADD_11_0_11,
10666 BCTR,
10667 NOP,
10668 NOP
10669 };
10670
10671 /*
10672 * Non-PIC glink code is a little simpler.
10673 *
10674 * # ith PLT code stub.
10675 * lis 11,(plt+(i-1)*4)@ha
10676 * lwz 11,(plt+(i-1)*4)@l(11)
10677 * mtctr 11
10678 * bctr
10679 *
10680 * The branch table is the same, then comes
10681 *
10682 * PLTresolve:
10683 * lis 12,(got+4)@ha
10684 * addis 11,11,(-res_0)@ha
10685 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10686 * addi 11,11,(-res_0)@l # r11 = index * 4
10687 * mtctr 0
10688 * add 0,11,11
10689 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10690 * add 11,0,11 # r11 = index * 12 = reloc offset.
10691 * bctr
10692 */
10693 static const unsigned int plt_resolve[] =
10694 {
10695 LIS_12,
10696 ADDIS_11_11,
10697 LWZ_0_12,
10698 ADDI_11_11,
10699 MTCTR_0,
10700 ADD_0_11_11,
10701 LWZ_12_12,
10702 ADD_11_0_11,
10703 BCTR,
10704 NOP,
10705 NOP,
10706 NOP,
10707 NOP,
10708 NOP,
10709 NOP,
10710 NOP
10711 };
10712
10713 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10714 abort ();
10715 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10716 abort ();
10717
10718 /* Build the branch table, one for each plt entry (less one),
10719 and perhaps some padding. */
10720 p = htab->glink->contents;
10721 p += htab->glink_pltresolve;
10722 endp = htab->glink->contents;
10723 endp += htab->glink->size - GLINK_PLTRESOLVE;
10724 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10725 {
10726 bfd_put_32 (output_bfd, B + endp - p, p);
10727 p += 4;
10728 }
10729 while (p < endp)
10730 {
10731 bfd_put_32 (output_bfd, NOP, p);
10732 p += 4;
10733 }
10734
10735 res0 = (htab->glink_pltresolve
10736 + htab->glink->output_section->vma
10737 + htab->glink->output_offset);
10738
10739 if (htab->params->ppc476_workaround)
10740 {
10741 /* Ensure that a call stub at the end of a page doesn't
10742 result in prefetch over the end of the page into the
10743 glink branch table. */
10744 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10745 bfd_vma page_addr;
10746 bfd_vma glink_start = (htab->glink->output_section->vma
10747 + htab->glink->output_offset);
10748
10749 for (page_addr = res0 & -pagesize;
10750 page_addr > glink_start;
10751 page_addr -= pagesize)
10752 {
10753 /* We have a plt call stub that may need fixing. */
10754 bfd_byte *loc;
10755 unsigned int insn;
10756
10757 loc = htab->glink->contents + page_addr - 4 - glink_start;
10758 insn = bfd_get_32 (output_bfd, loc);
10759 if (insn == BCTR)
10760 {
10761 /* By alignment, we know that there must be at least
10762 one other call stub before this one. */
10763 insn = bfd_get_32 (output_bfd, loc - 16);
10764 if (insn == BCTR)
10765 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10766 else
10767 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10768 }
10769 }
10770 }
10771
10772 /* Last comes the PLTresolve stub. */
10773 if (bfd_link_pic (info))
10774 {
10775 bfd_vma bcl;
10776
10777 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10778 {
10779 unsigned int insn = pic_plt_resolve[i];
10780
10781 if (htab->params->ppc476_workaround && insn == NOP)
10782 insn = BA + 0;
10783 bfd_put_32 (output_bfd, insn, p);
10784 p += 4;
10785 }
10786 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10787
10788 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10789 + htab->glink->output_section->vma
10790 + htab->glink->output_offset);
10791
10792 bfd_put_32 (output_bfd,
10793 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10794 bfd_put_32 (output_bfd,
10795 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10796 bfd_put_32 (output_bfd,
10797 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10798 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10799 {
10800 bfd_put_32 (output_bfd,
10801 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10802 bfd_put_32 (output_bfd,
10803 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10804 }
10805 else
10806 {
10807 bfd_put_32 (output_bfd,
10808 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10809 bfd_put_32 (output_bfd,
10810 LWZ_12_12 + 4, p + 9*4);
10811 }
10812 }
10813 else
10814 {
10815 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10816 {
10817 unsigned int insn = plt_resolve[i];
10818
10819 if (htab->params->ppc476_workaround && insn == NOP)
10820 insn = BA + 0;
10821 bfd_put_32 (output_bfd, insn, p);
10822 p += 4;
10823 }
10824 p -= 4 * ARRAY_SIZE (plt_resolve);
10825
10826 bfd_put_32 (output_bfd,
10827 LIS_12 + PPC_HA (got + 4), p + 0*4);
10828 bfd_put_32 (output_bfd,
10829 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10830 bfd_put_32 (output_bfd,
10831 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10832 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10833 {
10834 bfd_put_32 (output_bfd,
10835 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10836 bfd_put_32 (output_bfd,
10837 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10838 }
10839 else
10840 {
10841 bfd_put_32 (output_bfd,
10842 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10843 bfd_put_32 (output_bfd,
10844 LWZ_12_12 + 4, p + 6*4);
10845 }
10846 }
10847 }
10848
10849 if (htab->glink_eh_frame != NULL
10850 && htab->glink_eh_frame->contents != NULL)
10851 {
10852 unsigned char *p = htab->glink_eh_frame->contents;
10853 bfd_vma val;
10854
10855 p += sizeof (glink_eh_frame_cie);
10856 /* FDE length. */
10857 p += 4;
10858 /* CIE pointer. */
10859 p += 4;
10860 /* Offset to .glink. */
10861 val = (htab->glink->output_section->vma
10862 + htab->glink->output_offset);
10863 val -= (htab->glink_eh_frame->output_section->vma
10864 + htab->glink_eh_frame->output_offset);
10865 val -= p - htab->glink_eh_frame->contents;
10866 bfd_put_32 (htab->elf.dynobj, val, p);
10867
10868 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10869 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10870 htab->glink_eh_frame,
10871 htab->glink_eh_frame->contents))
10872 return FALSE;
10873 }
10874
10875 return ret;
10876 }
10877 \f
10878 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10879 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10880 #define TARGET_BIG_SYM powerpc_elf32_vec
10881 #define TARGET_BIG_NAME "elf32-powerpc"
10882 #define ELF_ARCH bfd_arch_powerpc
10883 #define ELF_TARGET_ID PPC32_ELF_DATA
10884 #define ELF_MACHINE_CODE EM_PPC
10885 #ifdef __QNXTARGET__
10886 #define ELF_MAXPAGESIZE 0x1000
10887 #define ELF_COMMONPAGESIZE 0x1000
10888 #else
10889 #define ELF_MAXPAGESIZE 0x10000
10890 #define ELF_COMMONPAGESIZE 0x10000
10891 #endif
10892 #define ELF_MINPAGESIZE 0x1000
10893 #define elf_info_to_howto ppc_elf_info_to_howto
10894
10895 #ifdef EM_CYGNUS_POWERPC
10896 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10897 #endif
10898
10899 #ifdef EM_PPC_OLD
10900 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10901 #endif
10902
10903 #define elf_backend_plt_not_loaded 1
10904 #define elf_backend_want_dynrelro 1
10905 #define elf_backend_can_gc_sections 1
10906 #define elf_backend_can_refcount 1
10907 #define elf_backend_rela_normal 1
10908 #define elf_backend_caches_rawsize 1
10909
10910 #define bfd_elf32_mkobject ppc_elf_mkobject
10911 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10912 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10913 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10914 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10915 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10916 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10917 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10918
10919 #define elf_backend_object_p ppc_elf_object_p
10920 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10921 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10922 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10923 #define elf_backend_relocate_section ppc_elf_relocate_section
10924 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10925 #define elf_backend_check_relocs ppc_elf_check_relocs
10926 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10927 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10928 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10929 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10930 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10931 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10932 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10933 #define elf_backend_fake_sections ppc_elf_fake_sections
10934 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10935 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10936 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10937 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10938 #define elf_backend_write_core_note ppc_elf_write_core_note
10939 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10940 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10941 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10942 #define elf_backend_write_section ppc_elf_write_section
10943 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10944 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10945 #define elf_backend_action_discarded ppc_elf_action_discarded
10946 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10947 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10948
10949 #include "elf32-target.h"
10950
10951 /* FreeBSD Target */
10952
10953 #undef TARGET_LITTLE_SYM
10954 #undef TARGET_LITTLE_NAME
10955
10956 #undef TARGET_BIG_SYM
10957 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10958 #undef TARGET_BIG_NAME
10959 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10960
10961 #undef ELF_OSABI
10962 #define ELF_OSABI ELFOSABI_FREEBSD
10963
10964 #undef elf32_bed
10965 #define elf32_bed elf32_powerpc_fbsd_bed
10966
10967 #include "elf32-target.h"
10968
10969 /* VxWorks Target */
10970
10971 #undef TARGET_LITTLE_SYM
10972 #undef TARGET_LITTLE_NAME
10973
10974 #undef TARGET_BIG_SYM
10975 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10976 #undef TARGET_BIG_NAME
10977 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10978
10979 #undef ELF_OSABI
10980
10981 /* VxWorks uses the elf default section flags for .plt. */
10982 static const struct bfd_elf_special_section *
10983 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10984 {
10985 if (sec->name == NULL)
10986 return NULL;
10987
10988 if (strcmp (sec->name, ".plt") == 0)
10989 return _bfd_elf_get_sec_type_attr (abfd, sec);
10990
10991 return ppc_elf_get_sec_type_attr (abfd, sec);
10992 }
10993
10994 /* Like ppc_elf_link_hash_table_create, but overrides
10995 appropriately for VxWorks. */
10996 static struct bfd_link_hash_table *
10997 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10998 {
10999 struct bfd_link_hash_table *ret;
11000
11001 ret = ppc_elf_link_hash_table_create (abfd);
11002 if (ret)
11003 {
11004 struct ppc_elf_link_hash_table *htab
11005 = (struct ppc_elf_link_hash_table *)ret;
11006 htab->is_vxworks = 1;
11007 htab->plt_type = PLT_VXWORKS;
11008 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11009 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11010 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11011 }
11012 return ret;
11013 }
11014
11015 /* Tweak magic VxWorks symbols as they are loaded. */
11016 static bfd_boolean
11017 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11018 struct bfd_link_info *info,
11019 Elf_Internal_Sym *sym,
11020 const char **namep ATTRIBUTE_UNUSED,
11021 flagword *flagsp ATTRIBUTE_UNUSED,
11022 asection **secp,
11023 bfd_vma *valp)
11024 {
11025 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
11026 valp))
11027 return FALSE;
11028
11029 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11030 }
11031
11032 static void
11033 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11034 {
11035 ppc_elf_final_write_processing(abfd, linker);
11036 elf_vxworks_final_write_processing(abfd, linker);
11037 }
11038
11039 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11040 define it. */
11041 #undef elf_backend_want_plt_sym
11042 #define elf_backend_want_plt_sym 1
11043 #undef elf_backend_want_got_plt
11044 #define elf_backend_want_got_plt 1
11045 #undef elf_backend_got_symbol_offset
11046 #define elf_backend_got_symbol_offset 0
11047 #undef elf_backend_plt_not_loaded
11048 #define elf_backend_plt_not_loaded 0
11049 #undef elf_backend_plt_readonly
11050 #define elf_backend_plt_readonly 1
11051 #undef elf_backend_got_header_size
11052 #define elf_backend_got_header_size 12
11053 #undef elf_backend_dtrel_excludes_plt
11054 #define elf_backend_dtrel_excludes_plt 1
11055
11056 #undef bfd_elf32_get_synthetic_symtab
11057
11058 #undef bfd_elf32_bfd_link_hash_table_create
11059 #define bfd_elf32_bfd_link_hash_table_create \
11060 ppc_elf_vxworks_link_hash_table_create
11061 #undef elf_backend_add_symbol_hook
11062 #define elf_backend_add_symbol_hook \
11063 ppc_elf_vxworks_add_symbol_hook
11064 #undef elf_backend_link_output_symbol_hook
11065 #define elf_backend_link_output_symbol_hook \
11066 elf_vxworks_link_output_symbol_hook
11067 #undef elf_backend_final_write_processing
11068 #define elf_backend_final_write_processing \
11069 ppc_elf_vxworks_final_write_processing
11070 #undef elf_backend_get_sec_type_attr
11071 #define elf_backend_get_sec_type_attr \
11072 ppc_elf_vxworks_get_sec_type_attr
11073 #undef elf_backend_emit_relocs
11074 #define elf_backend_emit_relocs \
11075 elf_vxworks_emit_relocs
11076
11077 #undef elf32_bed
11078 #define elf32_bed ppc_elf_vxworks_bed
11079 #undef elf_backend_post_process_headers
11080
11081 #include "elf32-target.h"
GDB Binutils - Deliverables
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