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__tls_get_addr_opt GOT entries
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 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 0x3e007ff, /* 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 0x3e007ff, /* 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 0x3e007ff, /* 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 0x3e007ff, /* 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 0x3e007ff, /* 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 0x3e007ff, /* 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 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1750 HOWTO (R_PPC_16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable hierarchy. */
1765 HOWTO (R_PPC_GNU_VTINHERIT, /* 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_VTINHERIT", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable member usage. */
1780 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTENTRY", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* Phony reloc to handle AIX style TOC entries. */
1795 HOWTO (R_PPC_TOC16, /* type */
1796 0, /* rightshift */
1797 1, /* size (0 = byte, 1 = short, 2 = long) */
1798 16, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_signed, /* complain_on_overflow */
1802 ppc_elf_unhandled_reloc, /* special_function */
1803 "R_PPC_TOC16", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0xffff, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808 };
1809
1810 /* External 32-bit PPC structure for PRPSINFO. This structure is
1811 ABI-defined, thus we choose to use char arrays here in order to
1812 avoid dealing with different types in different architectures.
1813
1814 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1815 most non-PPC architectures use `short int'.
1816
1817 This structure will ultimately be written in the corefile's note
1818 section, as the PRPSINFO. */
1819
1820 struct elf_external_ppc_linux_prpsinfo32
1821 {
1822 char pr_state; /* Numeric process state. */
1823 char pr_sname; /* Char for pr_state. */
1824 char pr_zomb; /* Zombie. */
1825 char pr_nice; /* Nice val. */
1826 char pr_flag[4]; /* Flags. */
1827 char pr_uid[4];
1828 char pr_gid[4];
1829 char pr_pid[4];
1830 char pr_ppid[4];
1831 char pr_pgrp[4];
1832 char pr_sid[4];
1833 char pr_fname[16]; /* Filename of executable. */
1834 char pr_psargs[80]; /* Initial part of arg list. */
1835 };
1836
1837 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1838 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1839
1840 static inline void
1841 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1842 const struct elf_internal_linux_prpsinfo *from,
1843 struct elf_external_ppc_linux_prpsinfo32 *to)
1844 {
1845 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1846 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1847 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1848 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1849 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1850 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1851 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1852 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1853 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1854 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1855 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1856 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1857 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1858 }
1859 \f
1860 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1861
1862 static void
1863 ppc_elf_howto_init (void)
1864 {
1865 unsigned int i, type;
1866
1867 for (i = 0;
1868 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1869 i++)
1870 {
1871 type = ppc_elf_howto_raw[i].type;
1872 if (type >= (sizeof (ppc_elf_howto_table)
1873 / sizeof (ppc_elf_howto_table[0])))
1874 abort ();
1875 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1876 }
1877 }
1878
1879 static reloc_howto_type *
1880 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1881 bfd_reloc_code_real_type code)
1882 {
1883 enum elf_ppc_reloc_type r;
1884
1885 /* Initialize howto table if not already done. */
1886 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1887 ppc_elf_howto_init ();
1888
1889 switch (code)
1890 {
1891 default:
1892 return NULL;
1893
1894 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1895 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1896 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1897 case BFD_RELOC_PPC64_ADDR16_DS:
1898 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1899 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1900 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1901 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1902 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1903 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1904 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1906 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1907 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1910 case BFD_RELOC_PPC64_GOT16_DS:
1911 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1912 case BFD_RELOC_PPC64_GOT16_LO_DS:
1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1915 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1916 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1917 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1918 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1919 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1920 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1921 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1922 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1923 case BFD_RELOC_PPC64_PLT16_LO_DS:
1924 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1925 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1926 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1927 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1928 case BFD_RELOC_PPC64_SECTOFF_DS:
1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1930 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1931 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1932 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1933 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1934 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1935 case BFD_RELOC_PPC64_TOC16_DS:
1936 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1937 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1938 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1939 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1940 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1941 case BFD_RELOC_PPC64_TPREL16_DS:
1942 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1943 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1944 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1945 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1946 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1947 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1948 case BFD_RELOC_PPC64_DTPREL16_DS:
1949 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1950 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1951 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1952 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1953 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1954 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1958 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1962 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1966 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1970 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1971 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1975 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1976 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1978 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1979 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1980 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1981 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1982 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1984 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1985 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1986 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1987 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1988 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1989 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1990 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1991 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1992 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1993 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1994 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1995 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1996 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1997 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1999 r = R_PPC_VLE_SDAREL_LO16A;
2000 break;
2001 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2002 r = R_PPC_VLE_SDAREL_LO16D;
2003 break;
2004 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2005 r = R_PPC_VLE_SDAREL_HI16A;
2006 break;
2007 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2008 r = R_PPC_VLE_SDAREL_HI16D;
2009 break;
2010 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2011 r = R_PPC_VLE_SDAREL_HA16A;
2012 break;
2013 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2014 r = R_PPC_VLE_SDAREL_HA16D;
2015 break;
2016 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2017 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2018 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2019 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2020 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2021 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2022 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2023 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2024 }
2025
2026 return ppc_elf_howto_table[r];
2027 };
2028
2029 static reloc_howto_type *
2030 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2031 const char *r_name)
2032 {
2033 unsigned int i;
2034
2035 for (i = 0;
2036 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2037 i++)
2038 if (ppc_elf_howto_raw[i].name != NULL
2039 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2040 return &ppc_elf_howto_raw[i];
2041
2042 return NULL;
2043 }
2044
2045 /* Set the howto pointer for a PowerPC ELF reloc. */
2046
2047 static void
2048 ppc_elf_info_to_howto (bfd *abfd,
2049 arelent *cache_ptr,
2050 Elf_Internal_Rela *dst)
2051 {
2052 unsigned int r_type;
2053
2054 /* Initialize howto table if not already done. */
2055 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2056 ppc_elf_howto_init ();
2057
2058 r_type = ELF32_R_TYPE (dst->r_info);
2059 if (r_type >= R_PPC_max)
2060 {
2061 /* xgettext:c-format */
2062 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2063 abfd, r_type);
2064 bfd_set_error (bfd_error_bad_value);
2065 r_type = R_PPC_NONE;
2066 }
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (!cache_ptr->howto)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%B: invalid relocation type %d"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2079 }
2080 }
2081
2082 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2083
2084 static bfd_reloc_status_type
2085 ppc_elf_addr16_ha_reloc (bfd *abfd,
2086 arelent *reloc_entry,
2087 asymbol *symbol,
2088 void *data,
2089 asection *input_section,
2090 bfd *output_bfd,
2091 char **error_message ATTRIBUTE_UNUSED)
2092 {
2093 enum elf_ppc_reloc_type r_type;
2094 long insn;
2095 bfd_size_type octets;
2096 bfd_vma value;
2097
2098 if (output_bfd != NULL)
2099 {
2100 reloc_entry->address += input_section->output_offset;
2101 return bfd_reloc_ok;
2102 }
2103
2104 reloc_entry->addend += 0x8000;
2105 r_type = reloc_entry->howto->type;
2106 if (r_type != R_PPC_REL16DX_HA)
2107 return bfd_reloc_continue;
2108
2109 value = 0;
2110 if (!bfd_is_com_section (symbol->section))
2111 value = symbol->value;
2112 value += (reloc_entry->addend
2113 + symbol->section->output_offset
2114 + symbol->section->output_section->vma);
2115 value -= (reloc_entry->address
2116 + input_section->output_offset
2117 + input_section->output_section->vma);
2118 value >>= 16;
2119
2120 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2121 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2122 insn &= ~0x1fffc1;
2123 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2124 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2125 return bfd_reloc_ok;
2126 }
2127
2128 static bfd_reloc_status_type
2129 ppc_elf_unhandled_reloc (bfd *abfd,
2130 arelent *reloc_entry,
2131 asymbol *symbol,
2132 void *data,
2133 asection *input_section,
2134 bfd *output_bfd,
2135 char **error_message)
2136 {
2137 /* If this is a relocatable link (output_bfd test tells us), just
2138 call the generic function. Any adjustment will be done at final
2139 link time. */
2140 if (output_bfd != NULL)
2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2142 input_section, output_bfd, error_message);
2143
2144 if (error_message != NULL)
2145 {
2146 static char buf[60];
2147 sprintf (buf, _("generic linker can't handle %s"),
2148 reloc_entry->howto->name);
2149 *error_message = buf;
2150 }
2151 return bfd_reloc_dangerous;
2152 }
2153 \f
2154 /* Sections created by the linker. */
2155
2156 typedef struct elf_linker_section
2157 {
2158 /* Pointer to the bfd section. */
2159 asection *section;
2160 /* Section name. */
2161 const char *name;
2162 /* Associated bss section name. */
2163 const char *bss_name;
2164 /* Associated symbol name. */
2165 const char *sym_name;
2166 /* Associated symbol. */
2167 struct elf_link_hash_entry *sym;
2168 } elf_linker_section_t;
2169
2170 /* Linked list of allocated pointer entries. This hangs off of the
2171 symbol lists, and provides allows us to return different pointers,
2172 based on different addend's. */
2173
2174 typedef struct elf_linker_section_pointers
2175 {
2176 /* next allocated pointer for this symbol */
2177 struct elf_linker_section_pointers *next;
2178 /* offset of pointer from beginning of section */
2179 bfd_vma offset;
2180 /* addend used */
2181 bfd_vma addend;
2182 /* which linker section this is */
2183 elf_linker_section_t *lsect;
2184 } elf_linker_section_pointers_t;
2185
2186 struct ppc_elf_obj_tdata
2187 {
2188 struct elf_obj_tdata elf;
2189
2190 /* A mapping from local symbols to offsets into the various linker
2191 sections added. This is index by the symbol index. */
2192 elf_linker_section_pointers_t **linker_section_pointers;
2193
2194 /* Flags used to auto-detect plt type. */
2195 unsigned int makes_plt_call : 1;
2196 unsigned int has_rel16 : 1;
2197 };
2198
2199 #define ppc_elf_tdata(bfd) \
2200 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2201
2202 #define elf_local_ptr_offsets(bfd) \
2203 (ppc_elf_tdata (bfd)->linker_section_pointers)
2204
2205 #define is_ppc_elf(bfd) \
2206 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2207 && elf_object_id (bfd) == PPC32_ELF_DATA)
2208
2209 /* Override the generic function because we store some extras. */
2210
2211 static bfd_boolean
2212 ppc_elf_mkobject (bfd *abfd)
2213 {
2214 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2215 PPC32_ELF_DATA);
2216 }
2217
2218 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2219
2220 bfd_boolean
2221 _bfd_elf_ppc_set_arch (bfd *abfd)
2222 {
2223 unsigned long mach = 0;
2224 asection *s;
2225 unsigned char *contents;
2226
2227 if (abfd->arch_info->bits_per_word == 32
2228 && bfd_big_endian (abfd))
2229 {
2230
2231 for (s = abfd->sections; s != NULL; s = s->next)
2232 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2233 break;
2234 if (s != NULL)
2235 mach = bfd_mach_ppc_vle;
2236 }
2237
2238 if (mach == 0)
2239 {
2240 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2241 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2242 {
2243 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2244 unsigned int i;
2245
2246 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2247 {
2248 unsigned int val = bfd_get_32 (abfd, contents + i);
2249 switch (val >> 16)
2250 {
2251 case PPC_APUINFO_PMR:
2252 case PPC_APUINFO_RFMCI:
2253 if (mach == 0)
2254 mach = bfd_mach_ppc_titan;
2255 break;
2256
2257 case PPC_APUINFO_ISEL:
2258 case PPC_APUINFO_CACHELCK:
2259 if (mach == bfd_mach_ppc_titan)
2260 mach = bfd_mach_ppc_e500mc;
2261 break;
2262
2263 case PPC_APUINFO_SPE:
2264 case PPC_APUINFO_EFS:
2265 case PPC_APUINFO_BRLOCK:
2266 if (mach != bfd_mach_ppc_vle)
2267 mach = bfd_mach_ppc_e500;
2268 break;
2269
2270 case PPC_APUINFO_VLE:
2271 mach = bfd_mach_ppc_vle;
2272 break;
2273
2274 default:
2275 mach = -1ul;
2276 }
2277 }
2278 free (contents);
2279 }
2280 }
2281
2282 if (mach != 0 && mach != -1ul)
2283 {
2284 const bfd_arch_info_type *arch;
2285
2286 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2287 if (arch->mach == mach)
2288 {
2289 abfd->arch_info = arch;
2290 break;
2291 }
2292 }
2293 return TRUE;
2294 }
2295
2296 /* Fix bad default arch selected for a 32 bit input bfd when the
2297 default is 64 bit. Also select arch based on apuinfo. */
2298
2299 static bfd_boolean
2300 ppc_elf_object_p (bfd *abfd)
2301 {
2302 if (!abfd->arch_info->the_default)
2303 return TRUE;
2304
2305 if (abfd->arch_info->bits_per_word == 64)
2306 {
2307 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2308
2309 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2310 {
2311 /* Relies on arch after 64 bit default being 32 bit default. */
2312 abfd->arch_info = abfd->arch_info->next;
2313 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2314 }
2315 }
2316 return _bfd_elf_ppc_set_arch (abfd);
2317 }
2318
2319 /* Function to set whether a module needs the -mrelocatable bit set. */
2320
2321 static bfd_boolean
2322 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2323 {
2324 BFD_ASSERT (!elf_flags_init (abfd)
2325 || elf_elfheader (abfd)->e_flags == flags);
2326
2327 elf_elfheader (abfd)->e_flags = flags;
2328 elf_flags_init (abfd) = TRUE;
2329 return TRUE;
2330 }
2331
2332 /* Support for core dump NOTE sections. */
2333
2334 static bfd_boolean
2335 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2336 {
2337 int offset;
2338 unsigned int size;
2339
2340 switch (note->descsz)
2341 {
2342 default:
2343 return FALSE;
2344
2345 case 268: /* Linux/PPC. */
2346 /* pr_cursig */
2347 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2348
2349 /* pr_pid */
2350 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2351
2352 /* pr_reg */
2353 offset = 72;
2354 size = 192;
2355
2356 break;
2357 }
2358
2359 /* Make a ".reg/999" section. */
2360 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2361 size, note->descpos + offset);
2362 }
2363
2364 static bfd_boolean
2365 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2366 {
2367 switch (note->descsz)
2368 {
2369 default:
2370 return FALSE;
2371
2372 case 128: /* Linux/PPC elf_prpsinfo. */
2373 elf_tdata (abfd)->core->pid
2374 = bfd_get_32 (abfd, note->descdata + 16);
2375 elf_tdata (abfd)->core->program
2376 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2377 elf_tdata (abfd)->core->command
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2379 }
2380
2381 /* Note that for some reason, a spurious space is tacked
2382 onto the end of the args in some (at least one anyway)
2383 implementations, so strip it off if it exists. */
2384
2385 {
2386 char *command = elf_tdata (abfd)->core->command;
2387 int n = strlen (command);
2388
2389 if (0 < n && command[n - 1] == ' ')
2390 command[n - 1] = '\0';
2391 }
2392
2393 return TRUE;
2394 }
2395
2396 char *
2397 elfcore_write_ppc_linux_prpsinfo32
2398 (bfd *abfd,
2399 char *buf,
2400 int *bufsiz,
2401 const struct elf_internal_linux_prpsinfo *prpsinfo)
2402 {
2403 struct elf_external_ppc_linux_prpsinfo32 data;
2404
2405 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2406 return elfcore_write_note (abfd, buf, bufsiz,
2407 "CORE", NT_PRPSINFO, &data, sizeof (data));
2408 }
2409
2410 static char *
2411 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2412 {
2413 switch (note_type)
2414 {
2415 default:
2416 return NULL;
2417
2418 case NT_PRPSINFO:
2419 {
2420 char data[128];
2421 va_list ap;
2422
2423 va_start (ap, note_type);
2424 memset (data, 0, sizeof (data));
2425 strncpy (data + 32, va_arg (ap, const char *), 16);
2426 strncpy (data + 48, va_arg (ap, const char *), 80);
2427 va_end (ap);
2428 return elfcore_write_note (abfd, buf, bufsiz,
2429 "CORE", note_type, data, sizeof (data));
2430 }
2431
2432 case NT_PRSTATUS:
2433 {
2434 char data[268];
2435 va_list ap;
2436 long pid;
2437 int cursig;
2438 const void *greg;
2439
2440 va_start (ap, note_type);
2441 memset (data, 0, 72);
2442 pid = va_arg (ap, long);
2443 bfd_put_32 (abfd, pid, data + 24);
2444 cursig = va_arg (ap, int);
2445 bfd_put_16 (abfd, cursig, data + 12);
2446 greg = va_arg (ap, const void *);
2447 memcpy (data + 72, greg, 192);
2448 memset (data + 264, 0, 4);
2449 va_end (ap);
2450 return elfcore_write_note (abfd, buf, bufsiz,
2451 "CORE", note_type, data, sizeof (data));
2452 }
2453 }
2454 }
2455
2456 static flagword
2457 ppc_elf_lookup_section_flags (char *flag_name)
2458 {
2459
2460 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2461 return SHF_PPC_VLE;
2462
2463 return 0;
2464 }
2465
2466 /* Return address for Ith PLT stub in section PLT, for relocation REL
2467 or (bfd_vma) -1 if it should not be included. */
2468
2469 static bfd_vma
2470 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2471 const asection *plt ATTRIBUTE_UNUSED,
2472 const arelent *rel)
2473 {
2474 return rel->address;
2475 }
2476
2477 /* Handle a PowerPC specific section when reading an object file. This
2478 is called when bfd_section_from_shdr finds a section with an unknown
2479 type. */
2480
2481 static bfd_boolean
2482 ppc_elf_section_from_shdr (bfd *abfd,
2483 Elf_Internal_Shdr *hdr,
2484 const char *name,
2485 int shindex)
2486 {
2487 asection *newsect;
2488 flagword flags;
2489
2490 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2491 return FALSE;
2492
2493 newsect = hdr->bfd_section;
2494 flags = bfd_get_section_flags (abfd, newsect);
2495 if (hdr->sh_flags & SHF_EXCLUDE)
2496 flags |= SEC_EXCLUDE;
2497
2498 if (hdr->sh_type == SHT_ORDERED)
2499 flags |= SEC_SORT_ENTRIES;
2500
2501 bfd_set_section_flags (abfd, newsect, flags);
2502 return TRUE;
2503 }
2504
2505 /* Set up any other section flags and such that may be necessary. */
2506
2507 static bfd_boolean
2508 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2509 Elf_Internal_Shdr *shdr,
2510 asection *asect)
2511 {
2512 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2513 shdr->sh_type = SHT_ORDERED;
2514
2515 return TRUE;
2516 }
2517
2518 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2519 need to bump up the number of section headers. */
2520
2521 static int
2522 ppc_elf_additional_program_headers (bfd *abfd,
2523 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2524 {
2525 asection *s;
2526 int ret = 0;
2527
2528 s = bfd_get_section_by_name (abfd, ".sbss2");
2529 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2530 ++ret;
2531
2532 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2533 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2534 ++ret;
2535
2536 return ret;
2537 }
2538
2539 /* Modify the segment map for VLE executables. */
2540
2541 bfd_boolean
2542 ppc_elf_modify_segment_map (bfd *abfd,
2543 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2544 {
2545 struct elf_segment_map *m;
2546
2547 /* At this point in the link, output sections have already been sorted by
2548 LMA and assigned to segments. All that is left to do is to ensure
2549 there is no mixing of VLE & non-VLE sections in a text segment.
2550 If we find that case, we split the segment.
2551 We maintain the original output section order. */
2552
2553 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2554 {
2555 struct elf_segment_map *n;
2556 bfd_size_type amt;
2557 unsigned int j, k;
2558 unsigned int p_flags;
2559
2560 if (m->p_type != PT_LOAD || m->count == 0)
2561 continue;
2562
2563 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2564 {
2565 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2566 p_flags |= PF_W;
2567 if ((m->sections[j]->flags & SEC_CODE) != 0)
2568 {
2569 p_flags |= PF_X;
2570 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2571 p_flags |= PF_PPC_VLE;
2572 break;
2573 }
2574 }
2575 if (j != m->count)
2576 while (++j != m->count)
2577 {
2578 unsigned int p_flags1 = PF_R;
2579
2580 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2581 p_flags1 |= PF_W;
2582 if ((m->sections[j]->flags & SEC_CODE) != 0)
2583 {
2584 p_flags1 |= PF_X;
2585 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2586 p_flags1 |= PF_PPC_VLE;
2587 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2588 break;
2589 }
2590 p_flags |= p_flags1;
2591 }
2592 /* If we're splitting a segment which originally contained rw
2593 sections then those sections might now only be in one of the
2594 two parts. So always set p_flags if splitting, even if we
2595 are being called for objcopy with p_flags_valid set. */
2596 if (j != m->count || !m->p_flags_valid)
2597 {
2598 m->p_flags_valid = 1;
2599 m->p_flags = p_flags;
2600 }
2601 if (j == m->count)
2602 continue;
2603
2604 /* Sections 0..j-1 stay in this (current) segment,
2605 the remainder are put in a new segment.
2606 The scan resumes with the new segment. */
2607
2608 amt = sizeof (struct elf_segment_map);
2609 amt += (m->count - j - 1) * sizeof (asection *);
2610 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2611 if (n == NULL)
2612 return FALSE;
2613
2614 n->p_type = PT_LOAD;
2615 n->count = m->count - j;
2616 for (k = 0; k < n->count; ++k)
2617 n->sections[k] = m->sections[j + k];
2618 m->count = j;
2619 m->p_size_valid = 0;
2620 n->next = m->next;
2621 m->next = n;
2622 }
2623
2624 return TRUE;
2625 }
2626
2627 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2628 .PPC.EMB.sbss0 a normal section, and not a bss section so
2629 that the linker doesn't crater when trying to make more than
2630 2 sections. */
2631
2632 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2633 {
2634 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2635 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2636 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2637 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2638 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2640 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2641 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2642 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2643 { NULL, 0, 0, 0, 0 }
2644 };
2645
2646 /* This is what we want for new plt/got. */
2647 static struct bfd_elf_special_section ppc_alt_plt =
2648 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2649
2650 static const struct bfd_elf_special_section *
2651 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2652 {
2653 const struct bfd_elf_special_section *ssect;
2654
2655 /* See if this is one of the special sections. */
2656 if (sec->name == NULL)
2657 return NULL;
2658
2659 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2660 sec->use_rela_p);
2661 if (ssect != NULL)
2662 {
2663 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2664 ssect = &ppc_alt_plt;
2665 return ssect;
2666 }
2667
2668 return _bfd_elf_get_sec_type_attr (abfd, sec);
2669 }
2670 \f
2671 /* Very simple linked list structure for recording apuinfo values. */
2672 typedef struct apuinfo_list
2673 {
2674 struct apuinfo_list *next;
2675 unsigned long value;
2676 }
2677 apuinfo_list;
2678
2679 static apuinfo_list *head;
2680 static bfd_boolean apuinfo_set;
2681
2682 static void
2683 apuinfo_list_init (void)
2684 {
2685 head = NULL;
2686 apuinfo_set = FALSE;
2687 }
2688
2689 static void
2690 apuinfo_list_add (unsigned long value)
2691 {
2692 apuinfo_list *entry = head;
2693
2694 while (entry != NULL)
2695 {
2696 if (entry->value == value)
2697 return;
2698 entry = entry->next;
2699 }
2700
2701 entry = bfd_malloc (sizeof (* entry));
2702 if (entry == NULL)
2703 return;
2704
2705 entry->value = value;
2706 entry->next = head;
2707 head = entry;
2708 }
2709
2710 static unsigned
2711 apuinfo_list_length (void)
2712 {
2713 apuinfo_list *entry;
2714 unsigned long count;
2715
2716 for (entry = head, count = 0;
2717 entry;
2718 entry = entry->next)
2719 ++ count;
2720
2721 return count;
2722 }
2723
2724 static inline unsigned long
2725 apuinfo_list_element (unsigned long number)
2726 {
2727 apuinfo_list * entry;
2728
2729 for (entry = head;
2730 entry && number --;
2731 entry = entry->next)
2732 ;
2733
2734 return entry ? entry->value : 0;
2735 }
2736
2737 static void
2738 apuinfo_list_finish (void)
2739 {
2740 apuinfo_list *entry;
2741
2742 for (entry = head; entry;)
2743 {
2744 apuinfo_list *next = entry->next;
2745 free (entry);
2746 entry = next;
2747 }
2748
2749 head = NULL;
2750 }
2751
2752 /* Scan the input BFDs and create a linked list of
2753 the APUinfo values that will need to be emitted. */
2754
2755 static void
2756 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2757 {
2758 bfd *ibfd;
2759 asection *asec;
2760 char *buffer = NULL;
2761 bfd_size_type largest_input_size = 0;
2762 unsigned i;
2763 unsigned long length;
2764 const char *error_message = NULL;
2765
2766 if (link_info == NULL)
2767 return;
2768
2769 apuinfo_list_init ();
2770
2771 /* Read in the input sections contents. */
2772 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2773 {
2774 unsigned long datum;
2775
2776 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2777 if (asec == NULL)
2778 continue;
2779
2780 /* xgettext:c-format */
2781 error_message = _("corrupt %s section in %B");
2782 length = asec->size;
2783 if (length < 20)
2784 goto fail;
2785
2786 apuinfo_set = TRUE;
2787 if (largest_input_size < asec->size)
2788 {
2789 if (buffer)
2790 free (buffer);
2791 largest_input_size = asec->size;
2792 buffer = bfd_malloc (largest_input_size);
2793 if (!buffer)
2794 return;
2795 }
2796
2797 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2798 || (bfd_bread (buffer, length, ibfd) != length))
2799 {
2800 /* xgettext:c-format */
2801 error_message = _("unable to read in %s section from %B");
2802 goto fail;
2803 }
2804
2805 /* Verify the contents of the header. Note - we have to
2806 extract the values this way in order to allow for a
2807 host whose endian-ness is different from the target. */
2808 datum = bfd_get_32 (ibfd, buffer);
2809 if (datum != sizeof APUINFO_LABEL)
2810 goto fail;
2811
2812 datum = bfd_get_32 (ibfd, buffer + 8);
2813 if (datum != 0x2)
2814 goto fail;
2815
2816 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2817 goto fail;
2818
2819 /* Get the number of bytes used for apuinfo entries. */
2820 datum = bfd_get_32 (ibfd, buffer + 4);
2821 if (datum + 20 != length)
2822 goto fail;
2823
2824 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2825 for (i = 0; i < datum; i += 4)
2826 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2827 }
2828
2829 error_message = NULL;
2830
2831 if (apuinfo_set)
2832 {
2833 /* Compute the size of the output section. */
2834 unsigned num_entries = apuinfo_list_length ();
2835
2836 /* Set the output section size, if it exists. */
2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2838
2839 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2840 {
2841 ibfd = abfd;
2842 /* xgettext:c-format */
2843 error_message = _("warning: unable to set size of %s section in %B");
2844 }
2845 }
2846
2847 fail:
2848 if (buffer)
2849 free (buffer);
2850
2851 if (error_message)
2852 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2853 }
2854
2855 /* Prevent the output section from accumulating the input sections'
2856 contents. We have already stored this in our linked list structure. */
2857
2858 static bfd_boolean
2859 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2860 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2861 asection *asec,
2862 bfd_byte *contents ATTRIBUTE_UNUSED)
2863 {
2864 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2865 }
2866
2867 /* Finally we can generate the output section. */
2868
2869 static void
2870 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2871 {
2872 bfd_byte *buffer;
2873 asection *asec;
2874 unsigned i;
2875 unsigned num_entries;
2876 bfd_size_type length;
2877
2878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2879 if (asec == NULL)
2880 return;
2881
2882 if (!apuinfo_set)
2883 return;
2884
2885 length = asec->size;
2886 if (length < 20)
2887 return;
2888
2889 buffer = bfd_malloc (length);
2890 if (buffer == NULL)
2891 {
2892 _bfd_error_handler
2893 (_("failed to allocate space for new APUinfo section."));
2894 return;
2895 }
2896
2897 /* Create the apuinfo header. */
2898 num_entries = apuinfo_list_length ();
2899 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2900 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2901 bfd_put_32 (abfd, 0x2, buffer + 8);
2902 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2903
2904 length = 20;
2905 for (i = 0; i < num_entries; i++)
2906 {
2907 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2908 length += 4;
2909 }
2910
2911 if (length != asec->size)
2912 _bfd_error_handler (_("failed to compute new APUinfo section."));
2913
2914 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2915 _bfd_error_handler (_("failed to install new APUinfo section."));
2916
2917 free (buffer);
2918
2919 apuinfo_list_finish ();
2920 }
2921 \f
2922 static bfd_boolean
2923 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2924 {
2925 bfd_byte buf[GLINK_ENTRY_SIZE];
2926
2927 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2928 return FALSE;
2929
2930 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2931 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2932 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2933 && bfd_get_32 (abfd, buf + 12) == BCTR);
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 static long
2946 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2947 long dynsymcount, asymbol **dynsyms,
2948 asymbol **ret)
2949 {
2950 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2951 asection *plt, *relplt, *dynamic, *glink;
2952 bfd_vma glink_vma = 0;
2953 bfd_vma resolv_vma = 0;
2954 bfd_vma stub_vma;
2955 asymbol *s;
2956 arelent *p;
2957 long count, i;
2958 size_t size;
2959 char *names;
2960 bfd_byte buf[4];
2961
2962 *ret = NULL;
2963
2964 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2965 return 0;
2966
2967 if (dynsymcount <= 0)
2968 return 0;
2969
2970 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2971 if (relplt == NULL)
2972 return 0;
2973
2974 plt = bfd_get_section_by_name (abfd, ".plt");
2975 if (plt == NULL)
2976 return 0;
2977
2978 /* Call common code to handle old-style executable PLTs. */
2979 if (elf_section_flags (plt) & SHF_EXECINSTR)
2980 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2981 dynsymcount, dynsyms, ret);
2982
2983 /* If this object was prelinked, the prelinker stored the address
2984 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2985 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2986 if (dynamic != NULL)
2987 {
2988 bfd_byte *dynbuf, *extdyn, *extdynend;
2989 size_t extdynsize;
2990 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2991
2992 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2993 return -1;
2994
2995 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2996 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2997
2998 extdyn = dynbuf;
2999 extdynend = extdyn + dynamic->size;
3000 for (; extdyn < extdynend; extdyn += extdynsize)
3001 {
3002 Elf_Internal_Dyn dyn;
3003 (*swap_dyn_in) (abfd, extdyn, &dyn);
3004
3005 if (dyn.d_tag == DT_NULL)
3006 break;
3007
3008 if (dyn.d_tag == DT_PPC_GOT)
3009 {
3010 unsigned int g_o_t = dyn.d_un.d_val;
3011 asection *got = bfd_get_section_by_name (abfd, ".got");
3012 if (got != NULL
3013 && bfd_get_section_contents (abfd, got, buf,
3014 g_o_t - got->vma + 4, 4))
3015 glink_vma = bfd_get_32 (abfd, buf);
3016 break;
3017 }
3018 }
3019 free (dynbuf);
3020 }
3021
3022 /* Otherwise we read the first plt entry. */
3023 if (glink_vma == 0)
3024 {
3025 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3026 glink_vma = bfd_get_32 (abfd, buf);
3027 }
3028
3029 if (glink_vma == 0)
3030 return 0;
3031
3032 /* The .glink section usually does not survive the final
3033 link; search for the section (usually .text) where the
3034 glink stubs now reside. */
3035 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3036 if (glink == NULL)
3037 return 0;
3038
3039 /* Determine glink PLT resolver by reading the relative branch
3040 from the first glink stub. */
3041 if (bfd_get_section_contents (abfd, glink, buf,
3042 glink_vma - glink->vma, 4))
3043 {
3044 unsigned int insn = bfd_get_32 (abfd, buf);
3045
3046 /* The first glink stub may either branch to the resolver ... */
3047 insn ^= B;
3048 if ((insn & ~0x3fffffc) == 0)
3049 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3050
3051 /* ... or fall through a bunch of NOPs. */
3052 else if ((insn ^ B ^ NOP) == 0)
3053 for (i = 4;
3054 bfd_get_section_contents (abfd, glink, buf,
3055 glink_vma - glink->vma + i, 4);
3056 i += 4)
3057 if (bfd_get_32 (abfd, buf) != NOP)
3058 {
3059 resolv_vma = glink_vma + i;
3060 break;
3061 }
3062 }
3063
3064 count = relplt->size / sizeof (Elf32_External_Rela);
3065 /* If the stubs are those for -shared/-pie then we might have
3066 multiple stubs for each plt entry. If that is the case then
3067 there is no way to associate stubs with their plt entries short
3068 of figuring out the GOT pointer value used in the stub. */
3069 if (!is_nonpic_glink_stub (abfd, glink,
3070 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3071 return 0;
3072
3073 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3074 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3075 return -1;
3076
3077 size = count * sizeof (asymbol);
3078 p = relplt->relocation;
3079 for (i = 0; i < count; i++, p++)
3080 {
3081 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3082 if (p->addend != 0)
3083 size += sizeof ("+0x") - 1 + 8;
3084 }
3085
3086 size += sizeof (asymbol) + sizeof ("__glink");
3087
3088 if (resolv_vma)
3089 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3090
3091 s = *ret = bfd_malloc (size);
3092 if (s == NULL)
3093 return -1;
3094
3095 stub_vma = glink_vma;
3096 names = (char *) (s + count + 1 + (resolv_vma != 0));
3097 p = relplt->relocation + count - 1;
3098 for (i = 0; i < count; i++)
3099 {
3100 size_t len;
3101
3102 *s = **p->sym_ptr_ptr;
3103 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3104 we are defining a symbol, ensure one of them is set. */
3105 if ((s->flags & BSF_LOCAL) == 0)
3106 s->flags |= BSF_GLOBAL;
3107 s->flags |= BSF_SYNTHETIC;
3108 s->section = glink;
3109 stub_vma -= 16;
3110 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3111 stub_vma -= 32;
3112 s->value = stub_vma - glink->vma;
3113 s->name = names;
3114 s->udata.p = NULL;
3115 len = strlen ((*p->sym_ptr_ptr)->name);
3116 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3117 names += len;
3118 if (p->addend != 0)
3119 {
3120 memcpy (names, "+0x", sizeof ("+0x") - 1);
3121 names += sizeof ("+0x") - 1;
3122 bfd_sprintf_vma (abfd, names, p->addend);
3123 names += strlen (names);
3124 }
3125 memcpy (names, "@plt", sizeof ("@plt"));
3126 names += sizeof ("@plt");
3127 ++s;
3128 --p;
3129 }
3130
3131 /* Add a symbol at the start of the glink branch table. */
3132 memset (s, 0, sizeof *s);
3133 s->the_bfd = abfd;
3134 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3135 s->section = glink;
3136 s->value = glink_vma - glink->vma;
3137 s->name = names;
3138 memcpy (names, "__glink", sizeof ("__glink"));
3139 names += sizeof ("__glink");
3140 s++;
3141 count++;
3142
3143 if (resolv_vma)
3144 {
3145 /* Add a symbol for the glink PLT resolver. */
3146 memset (s, 0, sizeof *s);
3147 s->the_bfd = abfd;
3148 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3149 s->section = glink;
3150 s->value = resolv_vma - glink->vma;
3151 s->name = names;
3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3153 names += sizeof ("__glink_PLTresolve");
3154 s++;
3155 count++;
3156 }
3157
3158 return count;
3159 }
3160 \f
3161 /* The following functions are specific to the ELF linker, while
3162 functions above are used generally. They appear in this file more
3163 or less in the order in which they are called. eg.
3164 ppc_elf_check_relocs is called early in the link process,
3165 ppc_elf_finish_dynamic_sections is one of the last functions
3166 called. */
3167
3168 /* Track PLT entries needed for a given symbol. We might need more
3169 than one glink entry per symbol when generating a pic binary. */
3170 struct plt_entry
3171 {
3172 struct plt_entry *next;
3173
3174 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3175 This field stores the offset into .got2 used to initialise the
3176 GOT pointer reg. It will always be at least 32768. (Current
3177 gcc always uses an offset of 32768, but ld -r will pack .got2
3178 sections together resulting in larger offsets). */
3179 bfd_vma addend;
3180
3181 /* The .got2 section. */
3182 asection *sec;
3183
3184 /* PLT refcount or offset. */
3185 union
3186 {
3187 bfd_signed_vma refcount;
3188 bfd_vma offset;
3189 } plt;
3190
3191 /* .glink stub offset. */
3192 bfd_vma glink_offset;
3193 };
3194
3195 /* Of those relocs that might be copied as dynamic relocs, this function
3196 selects those that must be copied when linking a shared library,
3197 even when the symbol is local. */
3198
3199 static int
3200 must_be_dyn_reloc (struct bfd_link_info *info,
3201 enum elf_ppc_reloc_type r_type)
3202 {
3203 switch (r_type)
3204 {
3205 default:
3206 return 1;
3207
3208 case R_PPC_REL24:
3209 case R_PPC_REL14:
3210 case R_PPC_REL14_BRTAKEN:
3211 case R_PPC_REL14_BRNTAKEN:
3212 case R_PPC_REL32:
3213 return 0;
3214
3215 case R_PPC_TPREL32:
3216 case R_PPC_TPREL16:
3217 case R_PPC_TPREL16_LO:
3218 case R_PPC_TPREL16_HI:
3219 case R_PPC_TPREL16_HA:
3220 return !bfd_link_executable (info);
3221 }
3222 }
3223
3224 /* Whether an undefined weak symbol should resolve to its link-time
3225 value, even in PIC or PIE objects. */
3226 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3227 ((H)->root.type == bfd_link_hash_undefweak \
3228 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3229 || (INFO)->dynamic_undefined_weak == 0))
3230
3231 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3232 copying dynamic variables from a shared lib into an app's dynbss
3233 section, and instead use a dynamic relocation to point into the
3234 shared lib. */
3235 #define ELIMINATE_COPY_RELOCS 1
3236
3237 /* Used to track dynamic relocations for local symbols. */
3238 struct ppc_dyn_relocs
3239 {
3240 struct ppc_dyn_relocs *next;
3241
3242 /* The input section of the reloc. */
3243 asection *sec;
3244
3245 /* Total number of relocs copied for the input section. */
3246 unsigned int count : 31;
3247
3248 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3249 unsigned int ifunc : 1;
3250 };
3251
3252 /* PPC ELF linker hash entry. */
3253
3254 struct ppc_elf_link_hash_entry
3255 {
3256 struct elf_link_hash_entry elf;
3257
3258 /* If this symbol is used in the linker created sections, the processor
3259 specific backend uses this field to map the field into the offset
3260 from the beginning of the section. */
3261 elf_linker_section_pointers_t *linker_section_pointer;
3262
3263 /* Track dynamic relocs copied for this symbol. */
3264 struct elf_dyn_relocs *dyn_relocs;
3265
3266 /* Contexts in which symbol is used in the GOT (or TOC).
3267 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3268 corresponding relocs are encountered during check_relocs.
3269 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3270 indicate the corresponding GOT entry type is not needed. */
3271 #define TLS_GD 1 /* GD reloc. */
3272 #define TLS_LD 2 /* LD reloc. */
3273 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3274 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3275 #define TLS_TLS 16 /* Any TLS reloc. */
3276 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3277 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3278 char tls_mask;
3279
3280 /* Nonzero if we have seen a small data relocation referring to this
3281 symbol. */
3282 unsigned char has_sda_refs : 1;
3283
3284 /* Flag use of given relocations. */
3285 unsigned char has_addr16_ha : 1;
3286 unsigned char has_addr16_lo : 1;
3287 };
3288
3289 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3290
3291 /* PPC ELF linker hash table. */
3292
3293 struct ppc_elf_link_hash_table
3294 {
3295 struct elf_link_hash_table elf;
3296
3297 /* Various options passed from the linker. */
3298 struct ppc_elf_params *params;
3299
3300 /* Short-cuts to get to dynamic linker sections. */
3301 asection *glink;
3302 asection *dynsbss;
3303 asection *relsbss;
3304 elf_linker_section_t sdata[2];
3305 asection *sbss;
3306 asection *glink_eh_frame;
3307
3308 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3309 asection *srelplt2;
3310
3311 /* Shortcut to __tls_get_addr. */
3312 struct elf_link_hash_entry *tls_get_addr;
3313
3314 /* The bfd that forced an old-style PLT. */
3315 bfd *old_bfd;
3316
3317 /* TLS local dynamic got entry handling. */
3318 union {
3319 bfd_signed_vma refcount;
3320 bfd_vma offset;
3321 } tlsld_got;
3322
3323 /* Offset of branch table to PltResolve function in glink. */
3324 bfd_vma glink_pltresolve;
3325
3326 /* Size of reserved GOT entries. */
3327 unsigned int got_header_size;
3328 /* Non-zero if allocating the header left a gap. */
3329 unsigned int got_gap;
3330
3331 /* The type of PLT we have chosen to use. */
3332 enum ppc_elf_plt_type plt_type;
3333
3334 /* True if the target system is VxWorks. */
3335 unsigned int is_vxworks:1;
3336
3337 /* Whether there exist local gnu indirect function resolvers,
3338 referenced by dynamic relocations. */
3339 unsigned int local_ifunc_resolver:1;
3340 unsigned int maybe_local_ifunc_resolver:1;
3341
3342 /* The size of PLT entries. */
3343 int plt_entry_size;
3344 /* The distance between adjacent PLT slots. */
3345 int plt_slot_size;
3346 /* The size of the first PLT entry. */
3347 int plt_initial_entry_size;
3348
3349 /* Small local sym cache. */
3350 struct sym_cache sym_cache;
3351 };
3352
3353 /* Rename some of the generic section flags to better document how they
3354 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3355
3356 /* Nonzero if this section has TLS related relocations. */
3357 #define has_tls_reloc sec_flg0
3358
3359 /* Nonzero if this section has a call to __tls_get_addr. */
3360 #define has_tls_get_addr_call sec_flg1
3361
3362 /* Get the PPC ELF linker hash table from a link_info structure. */
3363
3364 #define ppc_elf_hash_table(p) \
3365 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3366 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3367
3368 /* Create an entry in a PPC ELF linker hash table. */
3369
3370 static struct bfd_hash_entry *
3371 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3372 struct bfd_hash_table *table,
3373 const char *string)
3374 {
3375 /* Allocate the structure if it has not already been allocated by a
3376 subclass. */
3377 if (entry == NULL)
3378 {
3379 entry = bfd_hash_allocate (table,
3380 sizeof (struct ppc_elf_link_hash_entry));
3381 if (entry == NULL)
3382 return entry;
3383 }
3384
3385 /* Call the allocation method of the superclass. */
3386 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3387 if (entry != NULL)
3388 {
3389 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3390 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3391 ppc_elf_hash_entry (entry)->tls_mask = 0;
3392 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3393 }
3394
3395 return entry;
3396 }
3397
3398 /* Create a PPC ELF linker hash table. */
3399
3400 static struct bfd_link_hash_table *
3401 ppc_elf_link_hash_table_create (bfd *abfd)
3402 {
3403 struct ppc_elf_link_hash_table *ret;
3404 static struct ppc_elf_params default_params
3405 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3406
3407 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3408 if (ret == NULL)
3409 return NULL;
3410
3411 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3412 ppc_elf_link_hash_newfunc,
3413 sizeof (struct ppc_elf_link_hash_entry),
3414 PPC32_ELF_DATA))
3415 {
3416 free (ret);
3417 return NULL;
3418 }
3419
3420 ret->elf.init_plt_refcount.refcount = 0;
3421 ret->elf.init_plt_refcount.glist = NULL;
3422 ret->elf.init_plt_offset.offset = 0;
3423 ret->elf.init_plt_offset.glist = NULL;
3424
3425 ret->params = &default_params;
3426
3427 ret->sdata[0].name = ".sdata";
3428 ret->sdata[0].sym_name = "_SDA_BASE_";
3429 ret->sdata[0].bss_name = ".sbss";
3430
3431 ret->sdata[1].name = ".sdata2";
3432 ret->sdata[1].sym_name = "_SDA2_BASE_";
3433 ret->sdata[1].bss_name = ".sbss2";
3434
3435 ret->plt_entry_size = 12;
3436 ret->plt_slot_size = 8;
3437 ret->plt_initial_entry_size = 72;
3438
3439 return &ret->elf.root;
3440 }
3441
3442 /* Hook linker params into hash table. */
3443
3444 void
3445 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3446 {
3447 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3448
3449 if (htab)
3450 htab->params = params;
3451 params->pagesize_p2 = bfd_log2 (params->pagesize);
3452 }
3453
3454 /* Create .got and the related sections. */
3455
3456 static bfd_boolean
3457 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3458 {
3459 struct ppc_elf_link_hash_table *htab;
3460
3461 if (!_bfd_elf_create_got_section (abfd, info))
3462 return FALSE;
3463
3464 htab = ppc_elf_hash_table (info);
3465 if (!htab->is_vxworks)
3466 {
3467 /* The powerpc .got has a blrl instruction in it. Mark it
3468 executable. */
3469 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3470 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3471 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3472 return FALSE;
3473 }
3474
3475 return TRUE;
3476 }
3477
3478 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3479 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3480 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3481
3482 static bfd_boolean
3483 ppc_elf_create_linker_section (bfd *abfd,
3484 struct bfd_link_info *info,
3485 flagword flags,
3486 elf_linker_section_t *lsect)
3487 {
3488 asection *s;
3489
3490 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3491 | SEC_LINKER_CREATED);
3492
3493 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3494 if (s == NULL)
3495 return FALSE;
3496 lsect->section = s;
3497
3498 /* Define the sym on the first section of this name. */
3499 s = bfd_get_section_by_name (abfd, lsect->name);
3500
3501 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3502 if (lsect->sym == NULL)
3503 return FALSE;
3504 lsect->sym->root.u.def.value = 0x8000;
3505 return TRUE;
3506 }
3507
3508 static bfd_boolean
3509 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3510 {
3511 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3512 asection *s;
3513 flagword flags;
3514
3515 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3516 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3517 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3518 htab->glink = s;
3519 if (s == NULL
3520 || !bfd_set_section_alignment (abfd, s,
3521 htab->params->ppc476_workaround ? 6 : 4))
3522 return FALSE;
3523
3524 if (!info->no_ld_generated_unwind_info)
3525 {
3526 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3527 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3528 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3529 htab->glink_eh_frame = s;
3530 if (s == NULL
3531 || !bfd_set_section_alignment (abfd, s, 2))
3532 return FALSE;
3533 }
3534
3535 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3536 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3537 htab->elf.iplt = s;
3538 if (s == NULL
3539 || !bfd_set_section_alignment (abfd, s, 4))
3540 return FALSE;
3541
3542 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3543 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3544 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3545 htab->elf.irelplt = s;
3546 if (s == NULL
3547 || ! bfd_set_section_alignment (abfd, s, 2))
3548 return FALSE;
3549
3550 if (!ppc_elf_create_linker_section (abfd, info, 0,
3551 &htab->sdata[0]))
3552 return FALSE;
3553
3554 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3555 &htab->sdata[1]))
3556 return FALSE;
3557
3558 return TRUE;
3559 }
3560
3561 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3562 to output sections (just like _bfd_elf_create_dynamic_sections has
3563 to create .dynbss and .rela.bss). */
3564
3565 static bfd_boolean
3566 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3567 {
3568 struct ppc_elf_link_hash_table *htab;
3569 asection *s;
3570 flagword flags;
3571
3572 htab = ppc_elf_hash_table (info);
3573
3574 if (htab->elf.sgot == NULL
3575 && !ppc_elf_create_got (abfd, info))
3576 return FALSE;
3577
3578 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3579 return FALSE;
3580
3581 if (htab->glink == NULL
3582 && !ppc_elf_create_glink (abfd, info))
3583 return FALSE;
3584
3585 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3586 SEC_ALLOC | SEC_LINKER_CREATED);
3587 htab->dynsbss = s;
3588 if (s == NULL)
3589 return FALSE;
3590
3591 if (! bfd_link_pic (info))
3592 {
3593 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3594 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3595 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3596 htab->relsbss = s;
3597 if (s == NULL
3598 || ! bfd_set_section_alignment (abfd, s, 2))
3599 return FALSE;
3600 }
3601
3602 if (htab->is_vxworks
3603 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3604 return FALSE;
3605
3606 s = htab->elf.splt;
3607 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3608 if (htab->plt_type == PLT_VXWORKS)
3609 /* The VxWorks PLT is a loaded section with contents. */
3610 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3611 return bfd_set_section_flags (abfd, s, flags);
3612 }
3613
3614 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3615
3616 static void
3617 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3618 struct elf_link_hash_entry *dir,
3619 struct elf_link_hash_entry *ind)
3620 {
3621 struct ppc_elf_link_hash_entry *edir, *eind;
3622
3623 edir = (struct ppc_elf_link_hash_entry *) dir;
3624 eind = (struct ppc_elf_link_hash_entry *) ind;
3625
3626 edir->tls_mask |= eind->tls_mask;
3627 edir->has_sda_refs |= eind->has_sda_refs;
3628
3629 /* If called to transfer flags for a weakdef during processing
3630 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3631 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3632 if (!(ELIMINATE_COPY_RELOCS
3633 && eind->elf.root.type != bfd_link_hash_indirect
3634 && edir->elf.dynamic_adjusted))
3635 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3636
3637 if (edir->elf.versioned != versioned_hidden)
3638 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3639 edir->elf.ref_regular |= eind->elf.ref_regular;
3640 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3641 edir->elf.needs_plt |= eind->elf.needs_plt;
3642 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3643
3644 if (eind->dyn_relocs != NULL)
3645 {
3646 if (edir->dyn_relocs != NULL)
3647 {
3648 struct elf_dyn_relocs **pp;
3649 struct elf_dyn_relocs *p;
3650
3651 /* Add reloc counts against the indirect sym to the direct sym
3652 list. Merge any entries against the same section. */
3653 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3654 {
3655 struct elf_dyn_relocs *q;
3656
3657 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3658 if (q->sec == p->sec)
3659 {
3660 q->pc_count += p->pc_count;
3661 q->count += p->count;
3662 *pp = p->next;
3663 break;
3664 }
3665 if (q == NULL)
3666 pp = &p->next;
3667 }
3668 *pp = edir->dyn_relocs;
3669 }
3670
3671 edir->dyn_relocs = eind->dyn_relocs;
3672 eind->dyn_relocs = NULL;
3673 }
3674
3675 /* If we were called to copy over info for a weak sym, that's all.
3676 You might think dyn_relocs need not be copied over; After all,
3677 both syms will be dynamic or both non-dynamic so we're just
3678 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3679 code in ppc_elf_adjust_dynamic_symbol needs to check for
3680 dyn_relocs in read-only sections, and it does so on what is the
3681 DIR sym here. */
3682 if (eind->elf.root.type != bfd_link_hash_indirect)
3683 return;
3684
3685 /* Copy over the GOT refcount entries that we may have already seen to
3686 the symbol which just became indirect. */
3687 edir->elf.got.refcount += eind->elf.got.refcount;
3688 eind->elf.got.refcount = 0;
3689
3690 /* And plt entries. */
3691 if (eind->elf.plt.plist != NULL)
3692 {
3693 if (edir->elf.plt.plist != NULL)
3694 {
3695 struct plt_entry **entp;
3696 struct plt_entry *ent;
3697
3698 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3699 {
3700 struct plt_entry *dent;
3701
3702 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3703 if (dent->sec == ent->sec && dent->addend == ent->addend)
3704 {
3705 dent->plt.refcount += ent->plt.refcount;
3706 *entp = ent->next;
3707 break;
3708 }
3709 if (dent == NULL)
3710 entp = &ent->next;
3711 }
3712 *entp = edir->elf.plt.plist;
3713 }
3714
3715 edir->elf.plt.plist = eind->elf.plt.plist;
3716 eind->elf.plt.plist = NULL;
3717 }
3718
3719 if (eind->elf.dynindx != -1)
3720 {
3721 if (edir->elf.dynindx != -1)
3722 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3723 edir->elf.dynstr_index);
3724 edir->elf.dynindx = eind->elf.dynindx;
3725 edir->elf.dynstr_index = eind->elf.dynstr_index;
3726 eind->elf.dynindx = -1;
3727 eind->elf.dynstr_index = 0;
3728 }
3729 }
3730
3731 /* Hook called by the linker routine which adds symbols from an object
3732 file. We use it to put .comm items in .sbss, and not .bss. */
3733
3734 static bfd_boolean
3735 ppc_elf_add_symbol_hook (bfd *abfd,
3736 struct bfd_link_info *info,
3737 Elf_Internal_Sym *sym,
3738 const char **namep ATTRIBUTE_UNUSED,
3739 flagword *flagsp ATTRIBUTE_UNUSED,
3740 asection **secp,
3741 bfd_vma *valp)
3742 {
3743 if (sym->st_shndx == SHN_COMMON
3744 && !bfd_link_relocatable (info)
3745 && is_ppc_elf (info->output_bfd)
3746 && sym->st_size <= elf_gp_size (abfd))
3747 {
3748 /* Common symbols less than or equal to -G nn bytes are automatically
3749 put into .sbss. */
3750 struct ppc_elf_link_hash_table *htab;
3751
3752 htab = ppc_elf_hash_table (info);
3753 if (htab->sbss == NULL)
3754 {
3755 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3756
3757 if (!htab->elf.dynobj)
3758 htab->elf.dynobj = abfd;
3759
3760 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3761 ".sbss",
3762 flags);
3763 if (htab->sbss == NULL)
3764 return FALSE;
3765 }
3766
3767 *secp = htab->sbss;
3768 *valp = sym->st_size;
3769 }
3770
3771 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3772 && (abfd->flags & DYNAMIC) == 0
3773 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3774 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3775
3776 return TRUE;
3777 }
3778 \f
3779 /* Find a linker generated pointer with a given addend and type. */
3780
3781 static elf_linker_section_pointers_t *
3782 elf_find_pointer_linker_section
3783 (elf_linker_section_pointers_t *linker_pointers,
3784 bfd_vma addend,
3785 elf_linker_section_t *lsect)
3786 {
3787 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3788 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3789 return linker_pointers;
3790
3791 return NULL;
3792 }
3793
3794 /* Allocate a pointer to live in a linker created section. */
3795
3796 static bfd_boolean
3797 elf_allocate_pointer_linker_section (bfd *abfd,
3798 elf_linker_section_t *lsect,
3799 struct elf_link_hash_entry *h,
3800 const Elf_Internal_Rela *rel)
3801 {
3802 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3803 elf_linker_section_pointers_t *linker_section_ptr;
3804 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3805 bfd_size_type amt;
3806
3807 BFD_ASSERT (lsect != NULL);
3808
3809 /* Is this a global symbol? */
3810 if (h != NULL)
3811 {
3812 struct ppc_elf_link_hash_entry *eh;
3813
3814 /* Has this symbol already been allocated? If so, our work is done. */
3815 eh = (struct ppc_elf_link_hash_entry *) h;
3816 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3817 rel->r_addend,
3818 lsect))
3819 return TRUE;
3820
3821 ptr_linker_section_ptr = &eh->linker_section_pointer;
3822 }
3823 else
3824 {
3825 BFD_ASSERT (is_ppc_elf (abfd));
3826
3827 /* Allocation of a pointer to a local symbol. */
3828 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3829
3830 /* Allocate a table to hold the local symbols if first time. */
3831 if (!ptr)
3832 {
3833 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3834
3835 amt = num_symbols;
3836 amt *= sizeof (elf_linker_section_pointers_t *);
3837 ptr = bfd_zalloc (abfd, amt);
3838
3839 if (!ptr)
3840 return FALSE;
3841
3842 elf_local_ptr_offsets (abfd) = ptr;
3843 }
3844
3845 /* Has this symbol already been allocated? If so, our work is done. */
3846 if (elf_find_pointer_linker_section (ptr[r_symndx],
3847 rel->r_addend,
3848 lsect))
3849 return TRUE;
3850
3851 ptr_linker_section_ptr = &ptr[r_symndx];
3852 }
3853
3854 /* Allocate space for a pointer in the linker section, and allocate
3855 a new pointer record from internal memory. */
3856 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3857 amt = sizeof (elf_linker_section_pointers_t);
3858 linker_section_ptr = bfd_alloc (abfd, amt);
3859
3860 if (!linker_section_ptr)
3861 return FALSE;
3862
3863 linker_section_ptr->next = *ptr_linker_section_ptr;
3864 linker_section_ptr->addend = rel->r_addend;
3865 linker_section_ptr->lsect = lsect;
3866 *ptr_linker_section_ptr = linker_section_ptr;
3867
3868 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3869 return FALSE;
3870 linker_section_ptr->offset = lsect->section->size;
3871 lsect->section->size += 4;
3872
3873 #ifdef DEBUG
3874 fprintf (stderr,
3875 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3876 lsect->name, (long) linker_section_ptr->offset,
3877 (long) lsect->section->size);
3878 #endif
3879
3880 return TRUE;
3881 }
3882
3883 static struct plt_entry **
3884 update_local_sym_info (bfd *abfd,
3885 Elf_Internal_Shdr *symtab_hdr,
3886 unsigned long r_symndx,
3887 int tls_type)
3888 {
3889 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3890 struct plt_entry **local_plt;
3891 char *local_got_tls_masks;
3892
3893 if (local_got_refcounts == NULL)
3894 {
3895 bfd_size_type size = symtab_hdr->sh_info;
3896
3897 size *= (sizeof (*local_got_refcounts)
3898 + sizeof (*local_plt)
3899 + sizeof (*local_got_tls_masks));
3900 local_got_refcounts = bfd_zalloc (abfd, size);
3901 if (local_got_refcounts == NULL)
3902 return NULL;
3903 elf_local_got_refcounts (abfd) = local_got_refcounts;
3904 }
3905
3906 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3907 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3908 local_got_tls_masks[r_symndx] |= tls_type;
3909 if (tls_type != PLT_IFUNC)
3910 local_got_refcounts[r_symndx] += 1;
3911 return local_plt + r_symndx;
3912 }
3913
3914 static bfd_boolean
3915 update_plt_info (bfd *abfd, struct plt_entry **plist,
3916 asection *sec, bfd_vma addend)
3917 {
3918 struct plt_entry *ent;
3919
3920 if (addend < 32768)
3921 sec = NULL;
3922 for (ent = *plist; ent != NULL; ent = ent->next)
3923 if (ent->sec == sec && ent->addend == addend)
3924 break;
3925 if (ent == NULL)
3926 {
3927 bfd_size_type amt = sizeof (*ent);
3928 ent = bfd_alloc (abfd, amt);
3929 if (ent == NULL)
3930 return FALSE;
3931 ent->next = *plist;
3932 ent->sec = sec;
3933 ent->addend = addend;
3934 ent->plt.refcount = 0;
3935 *plist = ent;
3936 }
3937 ent->plt.refcount += 1;
3938 return TRUE;
3939 }
3940
3941 static struct plt_entry *
3942 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3943 {
3944 struct plt_entry *ent;
3945
3946 if (addend < 32768)
3947 sec = NULL;
3948 for (ent = *plist; ent != NULL; ent = ent->next)
3949 if (ent->sec == sec && ent->addend == addend)
3950 break;
3951 return ent;
3952 }
3953
3954 static bfd_boolean
3955 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3956 {
3957 return (r_type == R_PPC_PLTREL24
3958 || r_type == R_PPC_LOCAL24PC
3959 || r_type == R_PPC_REL24
3960 || r_type == R_PPC_REL14
3961 || r_type == R_PPC_REL14_BRTAKEN
3962 || r_type == R_PPC_REL14_BRNTAKEN
3963 || r_type == R_PPC_ADDR24
3964 || r_type == R_PPC_ADDR14
3965 || r_type == R_PPC_ADDR14_BRTAKEN
3966 || r_type == R_PPC_ADDR14_BRNTAKEN
3967 || r_type == R_PPC_VLE_REL24);
3968 }
3969
3970 static void
3971 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3972 {
3973 _bfd_error_handler
3974 /* xgettext:c-format */
3975 (_("%B: relocation %s cannot be used when making a shared object"),
3976 abfd,
3977 ppc_elf_howto_table[r_type]->name);
3978 bfd_set_error (bfd_error_bad_value);
3979 }
3980
3981 /* Look through the relocs for a section during the first phase, and
3982 allocate space in the global offset table or procedure linkage
3983 table. */
3984
3985 static bfd_boolean
3986 ppc_elf_check_relocs (bfd *abfd,
3987 struct bfd_link_info *info,
3988 asection *sec,
3989 const Elf_Internal_Rela *relocs)
3990 {
3991 struct ppc_elf_link_hash_table *htab;
3992 Elf_Internal_Shdr *symtab_hdr;
3993 struct elf_link_hash_entry **sym_hashes;
3994 const Elf_Internal_Rela *rel;
3995 const Elf_Internal_Rela *rel_end;
3996 asection *got2, *sreloc;
3997 struct elf_link_hash_entry *tga;
3998
3999 if (bfd_link_relocatable (info))
4000 return TRUE;
4001
4002 /* Don't do anything special with non-loaded, non-alloced sections.
4003 In particular, any relocs in such sections should not affect GOT
4004 and PLT reference counting (ie. we don't allow them to create GOT
4005 or PLT entries), there's no possibility or desire to optimize TLS
4006 relocs, and there's not much point in propagating relocs to shared
4007 libs that the dynamic linker won't relocate. */
4008 if ((sec->flags & SEC_ALLOC) == 0)
4009 return TRUE;
4010
4011 #ifdef DEBUG
4012 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4013 sec, abfd);
4014 #endif
4015
4016 BFD_ASSERT (is_ppc_elf (abfd));
4017
4018 /* Initialize howto table if not already done. */
4019 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4020 ppc_elf_howto_init ();
4021
4022 htab = ppc_elf_hash_table (info);
4023 if (htab->glink == NULL)
4024 {
4025 if (htab->elf.dynobj == NULL)
4026 htab->elf.dynobj = abfd;
4027 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4028 return FALSE;
4029 }
4030 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4031 FALSE, FALSE, TRUE);
4032 symtab_hdr = &elf_symtab_hdr (abfd);
4033 sym_hashes = elf_sym_hashes (abfd);
4034 got2 = bfd_get_section_by_name (abfd, ".got2");
4035 sreloc = NULL;
4036
4037 rel_end = relocs + sec->reloc_count;
4038 for (rel = relocs; rel < rel_end; rel++)
4039 {
4040 unsigned long r_symndx;
4041 enum elf_ppc_reloc_type r_type;
4042 struct elf_link_hash_entry *h;
4043 int tls_type;
4044 struct plt_entry **ifunc;
4045
4046 r_symndx = ELF32_R_SYM (rel->r_info);
4047 if (r_symndx < symtab_hdr->sh_info)
4048 h = NULL;
4049 else
4050 {
4051 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4052 while (h->root.type == bfd_link_hash_indirect
4053 || h->root.type == bfd_link_hash_warning)
4054 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4055
4056 /* PR15323, ref flags aren't set for references in the same
4057 object. */
4058 h->root.non_ir_ref_regular = 1;
4059 }
4060
4061 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4062 This shows up in particular in an R_PPC_ADDR32 in the eabi
4063 startup code. */
4064 if (h != NULL
4065 && htab->elf.sgot == NULL
4066 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4067 {
4068 if (htab->elf.dynobj == NULL)
4069 htab->elf.dynobj = abfd;
4070 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4071 return FALSE;
4072 BFD_ASSERT (h == htab->elf.hgot);
4073 }
4074
4075 tls_type = 0;
4076 r_type = ELF32_R_TYPE (rel->r_info);
4077 ifunc = NULL;
4078 if (h == NULL && !htab->is_vxworks)
4079 {
4080 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4081 abfd, r_symndx);
4082 if (isym == NULL)
4083 return FALSE;
4084
4085 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4086 {
4087 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4088 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4089 PLT_IFUNC);
4090 if (ifunc == NULL)
4091 return FALSE;
4092
4093 /* STT_GNU_IFUNC symbols must have a PLT entry;
4094 In a non-pie executable even when there are
4095 no plt calls. */
4096 if (!bfd_link_pic (info)
4097 || is_branch_reloc (r_type))
4098 {
4099 bfd_vma addend = 0;
4100 if (r_type == R_PPC_PLTREL24)
4101 {
4102 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4103 if (bfd_link_pic (info))
4104 addend = rel->r_addend;
4105 }
4106 if (!update_plt_info (abfd, ifunc, got2, addend))
4107 return FALSE;
4108 }
4109 }
4110 }
4111
4112 if (!htab->is_vxworks
4113 && is_branch_reloc (r_type)
4114 && h != NULL
4115 && h == tga)
4116 {
4117 if (rel != relocs
4118 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4119 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4120 /* We have a new-style __tls_get_addr call with a marker
4121 reloc. */
4122 ;
4123 else
4124 /* Mark this section as having an old-style call. */
4125 sec->has_tls_get_addr_call = 1;
4126 }
4127
4128 switch (r_type)
4129 {
4130 case R_PPC_TLSGD:
4131 case R_PPC_TLSLD:
4132 /* These special tls relocs tie a call to __tls_get_addr with
4133 its parameter symbol. */
4134 break;
4135
4136 case R_PPC_GOT_TLSLD16:
4137 case R_PPC_GOT_TLSLD16_LO:
4138 case R_PPC_GOT_TLSLD16_HI:
4139 case R_PPC_GOT_TLSLD16_HA:
4140 tls_type = TLS_TLS | TLS_LD;
4141 goto dogottls;
4142
4143 case R_PPC_GOT_TLSGD16:
4144 case R_PPC_GOT_TLSGD16_LO:
4145 case R_PPC_GOT_TLSGD16_HI:
4146 case R_PPC_GOT_TLSGD16_HA:
4147 tls_type = TLS_TLS | TLS_GD;
4148 goto dogottls;
4149
4150 case R_PPC_GOT_TPREL16:
4151 case R_PPC_GOT_TPREL16_LO:
4152 case R_PPC_GOT_TPREL16_HI:
4153 case R_PPC_GOT_TPREL16_HA:
4154 if (bfd_link_pic (info))
4155 info->flags |= DF_STATIC_TLS;
4156 tls_type = TLS_TLS | TLS_TPREL;
4157 goto dogottls;
4158
4159 case R_PPC_GOT_DTPREL16:
4160 case R_PPC_GOT_DTPREL16_LO:
4161 case R_PPC_GOT_DTPREL16_HI:
4162 case R_PPC_GOT_DTPREL16_HA:
4163 tls_type = TLS_TLS | TLS_DTPREL;
4164 dogottls:
4165 sec->has_tls_reloc = 1;
4166 /* Fall through. */
4167
4168 /* GOT16 relocations */
4169 case R_PPC_GOT16:
4170 case R_PPC_GOT16_LO:
4171 case R_PPC_GOT16_HI:
4172 case R_PPC_GOT16_HA:
4173 /* This symbol requires a global offset table entry. */
4174 if (htab->elf.sgot == NULL)
4175 {
4176 if (htab->elf.dynobj == NULL)
4177 htab->elf.dynobj = abfd;
4178 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4179 return FALSE;
4180 }
4181 if (h != NULL)
4182 {
4183 h->got.refcount += 1;
4184 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4185 }
4186 else
4187 /* This is a global offset table entry for a local symbol. */
4188 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4189 return FALSE;
4190
4191 /* We may also need a plt entry if the symbol turns out to be
4192 an ifunc. */
4193 if (h != NULL && !bfd_link_pic (info))
4194 {
4195 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4196 return FALSE;
4197 }
4198 break;
4199
4200 /* Indirect .sdata relocation. */
4201 case R_PPC_EMB_SDAI16:
4202 if (bfd_link_pic (info))
4203 {
4204 bad_shared_reloc (abfd, r_type);
4205 return FALSE;
4206 }
4207 htab->sdata[0].sym->ref_regular = 1;
4208 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4209 h, rel))
4210 return FALSE;
4211 if (h != NULL)
4212 {
4213 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4214 h->non_got_ref = TRUE;
4215 }
4216 break;
4217
4218 /* Indirect .sdata2 relocation. */
4219 case R_PPC_EMB_SDA2I16:
4220 if (bfd_link_pic (info))
4221 {
4222 bad_shared_reloc (abfd, r_type);
4223 return FALSE;
4224 }
4225 htab->sdata[1].sym->ref_regular = 1;
4226 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4227 h, rel))
4228 return FALSE;
4229 if (h != NULL)
4230 {
4231 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4232 h->non_got_ref = TRUE;
4233 }
4234 break;
4235
4236 case R_PPC_SDAREL16:
4237 htab->sdata[0].sym->ref_regular = 1;
4238 /* Fall through. */
4239
4240 case R_PPC_VLE_SDAREL_LO16A:
4241 case R_PPC_VLE_SDAREL_LO16D:
4242 case R_PPC_VLE_SDAREL_HI16A:
4243 case R_PPC_VLE_SDAREL_HI16D:
4244 case R_PPC_VLE_SDAREL_HA16A:
4245 case R_PPC_VLE_SDAREL_HA16D:
4246 if (h != NULL)
4247 {
4248 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4249 h->non_got_ref = TRUE;
4250 }
4251 break;
4252
4253 case R_PPC_VLE_REL8:
4254 case R_PPC_VLE_REL15:
4255 case R_PPC_VLE_REL24:
4256 case R_PPC_VLE_LO16A:
4257 case R_PPC_VLE_LO16D:
4258 case R_PPC_VLE_HI16A:
4259 case R_PPC_VLE_HI16D:
4260 case R_PPC_VLE_HA16A:
4261 case R_PPC_VLE_HA16D:
4262 break;
4263
4264 case R_PPC_EMB_SDA2REL:
4265 if (bfd_link_pic (info))
4266 {
4267 bad_shared_reloc (abfd, r_type);
4268 return FALSE;
4269 }
4270 htab->sdata[1].sym->ref_regular = 1;
4271 if (h != NULL)
4272 {
4273 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4274 h->non_got_ref = TRUE;
4275 }
4276 break;
4277
4278 case R_PPC_VLE_SDA21_LO:
4279 case R_PPC_VLE_SDA21:
4280 case R_PPC_EMB_SDA21:
4281 case R_PPC_EMB_RELSDA:
4282 if (bfd_link_pic (info))
4283 {
4284 bad_shared_reloc (abfd, r_type);
4285 return FALSE;
4286 }
4287 if (h != NULL)
4288 {
4289 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4290 h->non_got_ref = TRUE;
4291 }
4292 break;
4293
4294 case R_PPC_EMB_NADDR32:
4295 case R_PPC_EMB_NADDR16:
4296 case R_PPC_EMB_NADDR16_LO:
4297 case R_PPC_EMB_NADDR16_HI:
4298 case R_PPC_EMB_NADDR16_HA:
4299 if (bfd_link_pic (info))
4300 {
4301 bad_shared_reloc (abfd, r_type);
4302 return FALSE;
4303 }
4304 if (h != NULL)
4305 h->non_got_ref = TRUE;
4306 break;
4307
4308 case R_PPC_PLTREL24:
4309 if (h == NULL)
4310 break;
4311 /* Fall through */
4312 case R_PPC_PLT32:
4313 case R_PPC_PLTREL32:
4314 case R_PPC_PLT16_LO:
4315 case R_PPC_PLT16_HI:
4316 case R_PPC_PLT16_HA:
4317 #ifdef DEBUG
4318 fprintf (stderr, "Reloc requires a PLT entry\n");
4319 #endif
4320 /* This symbol requires a procedure linkage table entry. */
4321 if (h == NULL)
4322 {
4323 if (ifunc == NULL)
4324 {
4325 /* It does not make sense to have a procedure linkage
4326 table entry for a non-ifunc local symbol. */
4327 info->callbacks->einfo
4328 /* xgettext:c-format */
4329 (_("%H: %s reloc against local symbol\n"),
4330 abfd, sec, rel->r_offset,
4331 ppc_elf_howto_table[r_type]->name);
4332 bfd_set_error (bfd_error_bad_value);
4333 return FALSE;
4334 }
4335 }
4336 else
4337 {
4338 bfd_vma addend = 0;
4339
4340 if (r_type == R_PPC_PLTREL24)
4341 {
4342 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4343 if (bfd_link_pic (info))
4344 addend = rel->r_addend;
4345 }
4346 h->needs_plt = 1;
4347 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4348 return FALSE;
4349 }
4350 break;
4351
4352 /* The following relocations don't need to propagate the
4353 relocation if linking a shared object since they are
4354 section relative. */
4355 case R_PPC_SECTOFF:
4356 case R_PPC_SECTOFF_LO:
4357 case R_PPC_SECTOFF_HI:
4358 case R_PPC_SECTOFF_HA:
4359 case R_PPC_DTPREL16:
4360 case R_PPC_DTPREL16_LO:
4361 case R_PPC_DTPREL16_HI:
4362 case R_PPC_DTPREL16_HA:
4363 case R_PPC_TOC16:
4364 break;
4365
4366 case R_PPC_REL16:
4367 case R_PPC_REL16_LO:
4368 case R_PPC_REL16_HI:
4369 case R_PPC_REL16_HA:
4370 case R_PPC_REL16DX_HA:
4371 ppc_elf_tdata (abfd)->has_rel16 = 1;
4372 break;
4373
4374 /* These are just markers. */
4375 case R_PPC_TLS:
4376 case R_PPC_EMB_MRKREF:
4377 case R_PPC_NONE:
4378 case R_PPC_max:
4379 case R_PPC_RELAX:
4380 case R_PPC_RELAX_PLT:
4381 case R_PPC_RELAX_PLTREL24:
4382 case R_PPC_16DX_HA:
4383 break;
4384
4385 /* These should only appear in dynamic objects. */
4386 case R_PPC_COPY:
4387 case R_PPC_GLOB_DAT:
4388 case R_PPC_JMP_SLOT:
4389 case R_PPC_RELATIVE:
4390 case R_PPC_IRELATIVE:
4391 break;
4392
4393 /* These aren't handled yet. We'll report an error later. */
4394 case R_PPC_ADDR30:
4395 case R_PPC_EMB_RELSEC16:
4396 case R_PPC_EMB_RELST_LO:
4397 case R_PPC_EMB_RELST_HI:
4398 case R_PPC_EMB_RELST_HA:
4399 case R_PPC_EMB_BIT_FLD:
4400 break;
4401
4402 /* This refers only to functions defined in the shared library. */
4403 case R_PPC_LOCAL24PC:
4404 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4405 {
4406 htab->plt_type = PLT_OLD;
4407 htab->old_bfd = abfd;
4408 }
4409 if (h != NULL && h->type == STT_GNU_IFUNC)
4410 {
4411 h->needs_plt = 1;
4412 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4413 return FALSE;
4414 }
4415 break;
4416
4417 /* This relocation describes the C++ object vtable hierarchy.
4418 Reconstruct it for later use during GC. */
4419 case R_PPC_GNU_VTINHERIT:
4420 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4421 return FALSE;
4422 break;
4423
4424 /* This relocation describes which C++ vtable entries are actually
4425 used. Record for later use during GC. */
4426 case R_PPC_GNU_VTENTRY:
4427 BFD_ASSERT (h != NULL);
4428 if (h != NULL
4429 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4430 return FALSE;
4431 break;
4432
4433 /* We shouldn't really be seeing these. */
4434 case R_PPC_TPREL32:
4435 case R_PPC_TPREL16:
4436 case R_PPC_TPREL16_LO:
4437 case R_PPC_TPREL16_HI:
4438 case R_PPC_TPREL16_HA:
4439 if (bfd_link_pic (info))
4440 info->flags |= DF_STATIC_TLS;
4441 goto dodyn;
4442
4443 /* Nor these. */
4444 case R_PPC_DTPMOD32:
4445 case R_PPC_DTPREL32:
4446 goto dodyn;
4447
4448 case R_PPC_REL32:
4449 if (h == NULL
4450 && got2 != NULL
4451 && (sec->flags & SEC_CODE) != 0
4452 && bfd_link_pic (info)
4453 && htab->plt_type == PLT_UNSET)
4454 {
4455 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4456 the start of a function, which assembles to a REL32
4457 reference to .got2. If we detect one of these, then
4458 force the old PLT layout because the linker cannot
4459 reliably deduce the GOT pointer value needed for
4460 PLT call stubs. */
4461 asection *s;
4462 Elf_Internal_Sym *isym;
4463
4464 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4465 abfd, r_symndx);
4466 if (isym == NULL)
4467 return FALSE;
4468
4469 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4470 if (s == got2)
4471 {
4472 htab->plt_type = PLT_OLD;
4473 htab->old_bfd = abfd;
4474 }
4475 }
4476 if (h == NULL || h == htab->elf.hgot)
4477 break;
4478 /* fall through */
4479
4480 case R_PPC_ADDR32:
4481 case R_PPC_ADDR16:
4482 case R_PPC_ADDR16_LO:
4483 case R_PPC_ADDR16_HI:
4484 case R_PPC_ADDR16_HA:
4485 case R_PPC_UADDR32:
4486 case R_PPC_UADDR16:
4487 if (h != NULL && !bfd_link_pic (info))
4488 {
4489 /* We may need a plt entry if the symbol turns out to be
4490 a function defined in a dynamic object. */
4491 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4492 return FALSE;
4493
4494 /* We may need a copy reloc too. */
4495 h->non_got_ref = 1;
4496 h->pointer_equality_needed = 1;
4497 if (r_type == R_PPC_ADDR16_HA)
4498 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4499 if (r_type == R_PPC_ADDR16_LO)
4500 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4501 }
4502 goto dodyn;
4503
4504 case R_PPC_REL24:
4505 case R_PPC_REL14:
4506 case R_PPC_REL14_BRTAKEN:
4507 case R_PPC_REL14_BRNTAKEN:
4508 if (h == NULL)
4509 break;
4510 if (h == htab->elf.hgot)
4511 {
4512 if (htab->plt_type == PLT_UNSET)
4513 {
4514 htab->plt_type = PLT_OLD;
4515 htab->old_bfd = abfd;
4516 }
4517 break;
4518 }
4519 /* fall through */
4520
4521 case R_PPC_ADDR24:
4522 case R_PPC_ADDR14:
4523 case R_PPC_ADDR14_BRTAKEN:
4524 case R_PPC_ADDR14_BRNTAKEN:
4525 if (h != NULL && !bfd_link_pic (info))
4526 {
4527 /* We may need a plt entry if the symbol turns out to be
4528 a function defined in a dynamic object. */
4529 h->needs_plt = 1;
4530 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4531 return FALSE;
4532 break;
4533 }
4534
4535 dodyn:
4536 /* If we are creating a shared library, and this is a reloc
4537 against a global symbol, or a non PC relative reloc
4538 against a local symbol, then we need to copy the reloc
4539 into the shared library. However, if we are linking with
4540 -Bsymbolic, we do not need to copy a reloc against a
4541 global symbol which is defined in an object we are
4542 including in the link (i.e., DEF_REGULAR is set). At
4543 this point we have not seen all the input files, so it is
4544 possible that DEF_REGULAR is not set now but will be set
4545 later (it is never cleared). In case of a weak definition,
4546 DEF_REGULAR may be cleared later by a strong definition in
4547 a shared library. We account for that possibility below by
4548 storing information in the dyn_relocs field of the hash
4549 table entry. A similar situation occurs when creating
4550 shared libraries and symbol visibility changes render the
4551 symbol local.
4552
4553 If on the other hand, we are creating an executable, we
4554 may need to keep relocations for symbols satisfied by a
4555 dynamic library if we manage to avoid copy relocs for the
4556 symbol. */
4557 if ((bfd_link_pic (info)
4558 && (must_be_dyn_reloc (info, r_type)
4559 || (h != NULL
4560 && (!SYMBOLIC_BIND (info, h)
4561 || h->root.type == bfd_link_hash_defweak
4562 || !h->def_regular))))
4563 || (ELIMINATE_COPY_RELOCS
4564 && !bfd_link_pic (info)
4565 && h != NULL
4566 && (h->root.type == bfd_link_hash_defweak
4567 || !h->def_regular)))
4568 {
4569 #ifdef DEBUG
4570 fprintf (stderr,
4571 "ppc_elf_check_relocs needs to "
4572 "create relocation for %s\n",
4573 (h && h->root.root.string
4574 ? h->root.root.string : "<unknown>"));
4575 #endif
4576 if (sreloc == NULL)
4577 {
4578 if (htab->elf.dynobj == NULL)
4579 htab->elf.dynobj = abfd;
4580
4581 sreloc = _bfd_elf_make_dynamic_reloc_section
4582 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4583
4584 if (sreloc == NULL)
4585 return FALSE;
4586 }
4587
4588 /* If this is a global symbol, we count the number of
4589 relocations we need for this symbol. */
4590 if (h != NULL)
4591 {
4592 struct elf_dyn_relocs *p;
4593 struct elf_dyn_relocs **rel_head;
4594
4595 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4596 p = *rel_head;
4597 if (p == NULL || p->sec != sec)
4598 {
4599 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4600 if (p == NULL)
4601 return FALSE;
4602 p->next = *rel_head;
4603 *rel_head = p;
4604 p->sec = sec;
4605 p->count = 0;
4606 p->pc_count = 0;
4607 }
4608 p->count += 1;
4609 if (!must_be_dyn_reloc (info, r_type))
4610 p->pc_count += 1;
4611 }
4612 else
4613 {
4614 /* Track dynamic relocs needed for local syms too.
4615 We really need local syms available to do this
4616 easily. Oh well. */
4617 struct ppc_dyn_relocs *p;
4618 struct ppc_dyn_relocs **rel_head;
4619 bfd_boolean is_ifunc;
4620 asection *s;
4621 void *vpp;
4622 Elf_Internal_Sym *isym;
4623
4624 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4625 abfd, r_symndx);
4626 if (isym == NULL)
4627 return FALSE;
4628
4629 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4630 if (s == NULL)
4631 s = sec;
4632
4633 vpp = &elf_section_data (s)->local_dynrel;
4634 rel_head = (struct ppc_dyn_relocs **) vpp;
4635 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4636 p = *rel_head;
4637 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4638 p = p->next;
4639 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4640 {
4641 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4642 if (p == NULL)
4643 return FALSE;
4644 p->next = *rel_head;
4645 *rel_head = p;
4646 p->sec = sec;
4647 p->ifunc = is_ifunc;
4648 p->count = 0;
4649 }
4650 p->count += 1;
4651 }
4652 }
4653
4654 break;
4655 }
4656 }
4657
4658 return TRUE;
4659 }
4660 \f
4661 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4662 and OBFD, and merge non-conflicting ones. */
4663 void
4664 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4665 {
4666 bfd *obfd = info->output_bfd;
4667 obj_attribute *in_attr, *in_attrs;
4668 obj_attribute *out_attr, *out_attrs;
4669
4670 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4671 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4672
4673 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4674 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4675
4676 if (in_attr->i != out_attr->i)
4677 {
4678 int in_fp = in_attr->i & 3;
4679 int out_fp = out_attr->i & 3;
4680
4681 if (in_fp == 0)
4682 ;
4683 else if (out_fp == 0)
4684 {
4685 out_attr->type = 1;
4686 out_attr->i ^= in_fp;
4687 }
4688 else if (out_fp != 2 && in_fp == 2)
4689 _bfd_error_handler
4690 /* xgettext:c-format */
4691 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4692 else if (out_fp == 2 && in_fp != 2)
4693 _bfd_error_handler
4694 /* xgettext:c-format */
4695 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4696 else if (out_fp == 1 && in_fp == 3)
4697 _bfd_error_handler
4698 /* xgettext:c-format */
4699 (_("Warning: %B uses double-precision hard float, "
4700 "%B uses single-precision hard float"), obfd, ibfd);
4701 else if (out_fp == 3 && in_fp == 1)
4702 _bfd_error_handler
4703 /* xgettext:c-format */
4704 (_("Warning: %B uses double-precision hard float, "
4705 "%B uses single-precision hard float"), ibfd, obfd);
4706
4707 in_fp = in_attr->i & 0xc;
4708 out_fp = out_attr->i & 0xc;
4709 if (in_fp == 0)
4710 ;
4711 else if (out_fp == 0)
4712 {
4713 out_attr->type = 1;
4714 out_attr->i ^= in_fp;
4715 }
4716 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4717 _bfd_error_handler
4718 /* xgettext:c-format */
4719 (_("Warning: %B uses 64-bit long double, "
4720 "%B uses 128-bit long double"), ibfd, obfd);
4721 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4722 _bfd_error_handler
4723 /* xgettext:c-format */
4724 (_("Warning: %B uses 64-bit long double, "
4725 "%B uses 128-bit long double"), obfd, ibfd);
4726 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4727 _bfd_error_handler
4728 /* xgettext:c-format */
4729 (_("Warning: %B uses IBM long double, "
4730 "%B uses IEEE long double"), ibfd, obfd);
4731 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4732 _bfd_error_handler
4733 /* xgettext:c-format */
4734 (_("Warning: %B uses IBM long double, "
4735 "%B uses IEEE long double"), obfd, ibfd);
4736 }
4737 }
4738
4739 /* Merge object attributes from IBFD into OBFD. Warn if
4740 there are conflicting attributes. */
4741 static bfd_boolean
4742 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4743 {
4744 bfd *obfd;
4745 obj_attribute *in_attr, *in_attrs;
4746 obj_attribute *out_attr, *out_attrs;
4747
4748 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4749
4750 obfd = info->output_bfd;
4751 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4752 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4753
4754 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4755 merge non-conflicting ones. */
4756 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4757 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4758 if (in_attr->i != out_attr->i)
4759 {
4760 int in_vec = in_attr->i & 3;
4761 int out_vec = out_attr->i & 3;
4762
4763 if (in_vec == 0)
4764 ;
4765 else if (out_vec == 0)
4766 {
4767 out_attr->type = 1;
4768 out_attr->i = in_vec;
4769 }
4770 /* For now, allow generic to transition to AltiVec or SPE
4771 without a warning. If GCC marked files with their stack
4772 alignment and used don't-care markings for files which are
4773 not affected by the vector ABI, we could warn about this
4774 case too. */
4775 else if (in_vec == 1)
4776 ;
4777 else if (out_vec == 1)
4778 {
4779 out_attr->type = 1;
4780 out_attr->i = in_vec;
4781 }
4782 else if (out_vec < in_vec)
4783 _bfd_error_handler
4784 /* xgettext:c-format */
4785 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4786 obfd, ibfd);
4787 else if (out_vec > in_vec)
4788 _bfd_error_handler
4789 /* xgettext:c-format */
4790 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4791 ibfd, obfd);
4792 }
4793
4794 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4795 and merge non-conflicting ones. */
4796 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4797 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4798 if (in_attr->i != out_attr->i)
4799 {
4800 int in_struct = in_attr->i & 3;
4801 int out_struct = out_attr->i & 3;
4802
4803 if (in_struct == 0 || in_struct == 3)
4804 ;
4805 else if (out_struct == 0)
4806 {
4807 out_attr->type = 1;
4808 out_attr->i = in_struct;
4809 }
4810 else if (out_struct < in_struct)
4811 _bfd_error_handler
4812 /* xgettext:c-format */
4813 (_("Warning: %B uses r3/r4 for small structure returns, "
4814 "%B uses memory"), obfd, ibfd);
4815 else if (out_struct > in_struct)
4816 _bfd_error_handler
4817 /* xgettext:c-format */
4818 (_("Warning: %B uses r3/r4 for small structure returns, "
4819 "%B uses memory"), ibfd, obfd);
4820 }
4821
4822 /* Merge Tag_compatibility attributes and any common GNU ones. */
4823 _bfd_elf_merge_object_attributes (ibfd, info);
4824
4825 return TRUE;
4826 }
4827
4828 /* Merge backend specific data from an object file to the output
4829 object file when linking. */
4830
4831 static bfd_boolean
4832 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4833 {
4834 bfd *obfd = info->output_bfd;
4835 flagword old_flags;
4836 flagword new_flags;
4837 bfd_boolean error;
4838
4839 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4840 return TRUE;
4841
4842 /* Check if we have the same endianness. */
4843 if (! _bfd_generic_verify_endian_match (ibfd, info))
4844 return FALSE;
4845
4846 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4847 return FALSE;
4848
4849 new_flags = elf_elfheader (ibfd)->e_flags;
4850 old_flags = elf_elfheader (obfd)->e_flags;
4851 if (!elf_flags_init (obfd))
4852 {
4853 /* First call, no flags set. */
4854 elf_flags_init (obfd) = TRUE;
4855 elf_elfheader (obfd)->e_flags = new_flags;
4856 }
4857
4858 /* Compatible flags are ok. */
4859 else if (new_flags == old_flags)
4860 ;
4861
4862 /* Incompatible flags. */
4863 else
4864 {
4865 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4866 to be linked with either. */
4867 error = FALSE;
4868 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4869 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4870 {
4871 error = TRUE;
4872 _bfd_error_handler
4873 (_("%B: compiled with -mrelocatable and linked with "
4874 "modules compiled normally"), ibfd);
4875 }
4876 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4877 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4878 {
4879 error = TRUE;
4880 _bfd_error_handler
4881 (_("%B: compiled normally and linked with "
4882 "modules compiled with -mrelocatable"), ibfd);
4883 }
4884
4885 /* The output is -mrelocatable-lib iff both the input files are. */
4886 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4887 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4888
4889 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4890 but each input file is either -mrelocatable or -mrelocatable-lib. */
4891 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4892 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4893 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4894 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4895
4896 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4897 any module uses it. */
4898 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4899
4900 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4901 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4902
4903 /* Warn about any other mismatches. */
4904 if (new_flags != old_flags)
4905 {
4906 error = TRUE;
4907 _bfd_error_handler
4908 /* xgettext:c-format */
4909 (_("%B: uses different e_flags (%#x) fields "
4910 "than previous modules (%#x)"),
4911 ibfd, new_flags, old_flags);
4912 }
4913
4914 if (error)
4915 {
4916 bfd_set_error (bfd_error_bad_value);
4917 return FALSE;
4918 }
4919 }
4920
4921 return TRUE;
4922 }
4923
4924 static void
4925 ppc_elf_vle_split16 (bfd *input_bfd,
4926 asection *input_section,
4927 unsigned long offset,
4928 bfd_byte *loc,
4929 bfd_vma value,
4930 split16_format_type split16_format,
4931 bfd_boolean fixup)
4932 {
4933 unsigned int insn, opcode, top5;
4934
4935 insn = bfd_get_32 (input_bfd, loc);
4936 opcode = insn & 0xfc00f800;
4937 if (opcode == E_OR2I_INSN
4938 || opcode == E_AND2I_DOT_INSN
4939 || opcode == E_OR2IS_INSN
4940 || opcode == E_LIS_INSN
4941 || opcode == E_AND2IS_DOT_INSN)
4942 {
4943 if (split16_format != split16a_type)
4944 {
4945 if (fixup)
4946 split16_format = split16a_type;
4947 else
4948 _bfd_error_handler
4949 /* xgettext:c-format */
4950 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4951 input_bfd, input_section, offset, opcode);
4952 }
4953 }
4954 else if (opcode == E_ADD2I_DOT_INSN
4955 || opcode == E_ADD2IS_INSN
4956 || opcode == E_CMP16I_INSN
4957 || opcode == E_MULL2I_INSN
4958 || opcode == E_CMPL16I_INSN
4959 || opcode == E_CMPH16I_INSN
4960 || opcode == E_CMPHL16I_INSN)
4961 {
4962 if (split16_format != split16d_type)
4963 {
4964 if (fixup)
4965 split16_format = split16d_type;
4966 else
4967 _bfd_error_handler
4968 /* xgettext:c-format */
4969 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4970 input_bfd, input_section, offset, opcode);
4971 }
4972 }
4973 top5 = value & 0xf800;
4974 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4975 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4976 insn |= top5;
4977 insn |= value & 0x7ff;
4978 bfd_put_32 (input_bfd, insn, loc);
4979 }
4980 \f
4981 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4982 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4983 int
4984 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4985 struct bfd_link_info *info)
4986 {
4987 struct ppc_elf_link_hash_table *htab;
4988 flagword flags;
4989
4990 htab = ppc_elf_hash_table (info);
4991
4992 if (htab->plt_type == PLT_UNSET)
4993 {
4994 struct elf_link_hash_entry *h;
4995
4996 if (htab->params->plt_style == PLT_OLD)
4997 htab->plt_type = PLT_OLD;
4998 else if (bfd_link_pic (info)
4999 && htab->elf.dynamic_sections_created
5000 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5001 FALSE, FALSE, TRUE)) != NULL
5002 && (h->type == STT_FUNC
5003 || h->needs_plt)
5004 && h->ref_regular
5005 && !(SYMBOL_CALLS_LOCAL (info, h)
5006 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5007 {
5008 /* Profiling of shared libs (and pies) is not supported with
5009 secure plt, because ppc32 does profiling before a
5010 function prologue and a secure plt pic call stubs needs
5011 r30 to be set up. */
5012 htab->plt_type = PLT_OLD;
5013 }
5014 else
5015 {
5016 bfd *ibfd;
5017 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5018
5019 /* Look through the reloc flags left by ppc_elf_check_relocs.
5020 Use the old style bss plt if a file makes plt calls
5021 without using the new relocs, and if ld isn't given
5022 --secure-plt and we never see REL16 relocs. */
5023 if (plt_type == PLT_UNSET)
5024 plt_type = PLT_OLD;
5025 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5026 if (is_ppc_elf (ibfd))
5027 {
5028 if (ppc_elf_tdata (ibfd)->has_rel16)
5029 plt_type = PLT_NEW;
5030 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5031 {
5032 plt_type = PLT_OLD;
5033 htab->old_bfd = ibfd;
5034 break;
5035 }
5036 }
5037 htab->plt_type = plt_type;
5038 }
5039 }
5040 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5041 {
5042 if (htab->old_bfd != NULL)
5043 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5044 htab->old_bfd);
5045 else
5046 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5047 }
5048
5049 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5050
5051 if (htab->plt_type == PLT_NEW)
5052 {
5053 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5054 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5055
5056 /* The new PLT is a loaded section. */
5057 if (htab->elf.splt != NULL
5058 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5059 return -1;
5060
5061 /* The new GOT is not executable. */
5062 if (htab->elf.sgot != NULL
5063 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5064 return -1;
5065 }
5066 else
5067 {
5068 /* Stop an unused .glink section from affecting .text alignment. */
5069 if (htab->glink != NULL
5070 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5071 return -1;
5072 }
5073 return htab->plt_type == PLT_NEW;
5074 }
5075 \f
5076 /* Return the section that should be marked against GC for a given
5077 relocation. */
5078
5079 static asection *
5080 ppc_elf_gc_mark_hook (asection *sec,
5081 struct bfd_link_info *info,
5082 Elf_Internal_Rela *rel,
5083 struct elf_link_hash_entry *h,
5084 Elf_Internal_Sym *sym)
5085 {
5086 if (h != NULL)
5087 switch (ELF32_R_TYPE (rel->r_info))
5088 {
5089 case R_PPC_GNU_VTINHERIT:
5090 case R_PPC_GNU_VTENTRY:
5091 return NULL;
5092 }
5093
5094 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5095 }
5096
5097 /* Update the got, plt and dynamic reloc reference counts for the
5098 section being removed. */
5099
5100 static bfd_boolean
5101 ppc_elf_gc_sweep_hook (bfd *abfd,
5102 struct bfd_link_info *info,
5103 asection *sec,
5104 const Elf_Internal_Rela *relocs)
5105 {
5106 struct ppc_elf_link_hash_table *htab;
5107 Elf_Internal_Shdr *symtab_hdr;
5108 struct elf_link_hash_entry **sym_hashes;
5109 bfd_signed_vma *local_got_refcounts;
5110 const Elf_Internal_Rela *rel, *relend;
5111 asection *got2;
5112
5113 if (bfd_link_relocatable (info))
5114 return TRUE;
5115
5116 if ((sec->flags & SEC_ALLOC) == 0)
5117 return TRUE;
5118
5119 elf_section_data (sec)->local_dynrel = NULL;
5120
5121 htab = ppc_elf_hash_table (info);
5122 symtab_hdr = &elf_symtab_hdr (abfd);
5123 sym_hashes = elf_sym_hashes (abfd);
5124 local_got_refcounts = elf_local_got_refcounts (abfd);
5125 got2 = bfd_get_section_by_name (abfd, ".got2");
5126
5127 relend = relocs + sec->reloc_count;
5128 for (rel = relocs; rel < relend; rel++)
5129 {
5130 unsigned long r_symndx;
5131 enum elf_ppc_reloc_type r_type;
5132 struct elf_link_hash_entry *h = NULL;
5133
5134 r_symndx = ELF32_R_SYM (rel->r_info);
5135 if (r_symndx >= symtab_hdr->sh_info)
5136 {
5137 struct elf_dyn_relocs **pp, *p;
5138 struct ppc_elf_link_hash_entry *eh;
5139
5140 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5141 while (h->root.type == bfd_link_hash_indirect
5142 || h->root.type == bfd_link_hash_warning)
5143 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5144 eh = (struct ppc_elf_link_hash_entry *) h;
5145
5146 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5147 if (p->sec == sec)
5148 {
5149 /* Everything must go for SEC. */
5150 *pp = p->next;
5151 break;
5152 }
5153 }
5154
5155 r_type = ELF32_R_TYPE (rel->r_info);
5156 if (!htab->is_vxworks
5157 && h == NULL
5158 && local_got_refcounts != NULL
5159 && (!bfd_link_pic (info)
5160 || is_branch_reloc (r_type)))
5161 {
5162 struct plt_entry **local_plt = (struct plt_entry **)
5163 (local_got_refcounts + symtab_hdr->sh_info);
5164 char *local_got_tls_masks = (char *)
5165 (local_plt + symtab_hdr->sh_info);
5166 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5167 {
5168 struct plt_entry **ifunc = local_plt + r_symndx;
5169 bfd_vma addend = 0;
5170 struct plt_entry *ent;
5171
5172 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5173 addend = rel->r_addend;
5174 ent = find_plt_ent (ifunc, got2, addend);
5175 if (ent->plt.refcount > 0)
5176 ent->plt.refcount -= 1;
5177 continue;
5178 }
5179 }
5180
5181 switch (r_type)
5182 {
5183 case R_PPC_GOT_TLSLD16:
5184 case R_PPC_GOT_TLSLD16_LO:
5185 case R_PPC_GOT_TLSLD16_HI:
5186 case R_PPC_GOT_TLSLD16_HA:
5187 case R_PPC_GOT_TLSGD16:
5188 case R_PPC_GOT_TLSGD16_LO:
5189 case R_PPC_GOT_TLSGD16_HI:
5190 case R_PPC_GOT_TLSGD16_HA:
5191 case R_PPC_GOT_TPREL16:
5192 case R_PPC_GOT_TPREL16_LO:
5193 case R_PPC_GOT_TPREL16_HI:
5194 case R_PPC_GOT_TPREL16_HA:
5195 case R_PPC_GOT_DTPREL16:
5196 case R_PPC_GOT_DTPREL16_LO:
5197 case R_PPC_GOT_DTPREL16_HI:
5198 case R_PPC_GOT_DTPREL16_HA:
5199 case R_PPC_GOT16:
5200 case R_PPC_GOT16_LO:
5201 case R_PPC_GOT16_HI:
5202 case R_PPC_GOT16_HA:
5203 if (h != NULL)
5204 {
5205 if (h->got.refcount > 0)
5206 h->got.refcount--;
5207 if (!bfd_link_pic (info))
5208 {
5209 struct plt_entry *ent;
5210
5211 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5212 if (ent != NULL && ent->plt.refcount > 0)
5213 ent->plt.refcount -= 1;
5214 }
5215 }
5216 else if (local_got_refcounts != NULL)
5217 {
5218 if (local_got_refcounts[r_symndx] > 0)
5219 local_got_refcounts[r_symndx]--;
5220 }
5221 break;
5222
5223 case R_PPC_REL24:
5224 case R_PPC_REL14:
5225 case R_PPC_REL14_BRTAKEN:
5226 case R_PPC_REL14_BRNTAKEN:
5227 case R_PPC_REL32:
5228 if (h == NULL || h == htab->elf.hgot)
5229 break;
5230 /* Fall through. */
5231
5232 case R_PPC_ADDR32:
5233 case R_PPC_ADDR24:
5234 case R_PPC_ADDR16:
5235 case R_PPC_ADDR16_LO:
5236 case R_PPC_ADDR16_HI:
5237 case R_PPC_ADDR16_HA:
5238 case R_PPC_ADDR14:
5239 case R_PPC_ADDR14_BRTAKEN:
5240 case R_PPC_ADDR14_BRNTAKEN:
5241 case R_PPC_UADDR32:
5242 case R_PPC_UADDR16:
5243 if (bfd_link_pic (info))
5244 break;
5245 /* Fall through. */
5246
5247 case R_PPC_PLT32:
5248 case R_PPC_PLTREL24:
5249 case R_PPC_PLTREL32:
5250 case R_PPC_PLT16_LO:
5251 case R_PPC_PLT16_HI:
5252 case R_PPC_PLT16_HA:
5253 if (h != NULL)
5254 {
5255 bfd_vma addend = 0;
5256 struct plt_entry *ent;
5257
5258 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5259 addend = rel->r_addend;
5260 ent = find_plt_ent (&h->plt.plist, got2, addend);
5261 if (ent != NULL && ent->plt.refcount > 0)
5262 ent->plt.refcount -= 1;
5263 }
5264 break;
5265
5266 default:
5267 break;
5268 }
5269 }
5270 return TRUE;
5271 }
5272 \f
5273 /* Set plt output section type, htab->tls_get_addr, and call the
5274 generic ELF tls_setup function. */
5275
5276 asection *
5277 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5278 {
5279 struct ppc_elf_link_hash_table *htab;
5280
5281 htab = ppc_elf_hash_table (info);
5282 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5283 FALSE, FALSE, TRUE);
5284 if (htab->plt_type != PLT_NEW)
5285 htab->params->no_tls_get_addr_opt = TRUE;
5286
5287 if (!htab->params->no_tls_get_addr_opt)
5288 {
5289 struct elf_link_hash_entry *opt, *tga;
5290 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5291 FALSE, FALSE, TRUE);
5292 if (opt != NULL
5293 && (opt->root.type == bfd_link_hash_defined
5294 || opt->root.type == bfd_link_hash_defweak))
5295 {
5296 /* If glibc supports an optimized __tls_get_addr call stub,
5297 signalled by the presence of __tls_get_addr_opt, and we'll
5298 be calling __tls_get_addr via a plt call stub, then
5299 make __tls_get_addr point to __tls_get_addr_opt. */
5300 tga = htab->tls_get_addr;
5301 if (htab->elf.dynamic_sections_created
5302 && tga != NULL
5303 && (tga->type == STT_FUNC
5304 || tga->needs_plt)
5305 && !(SYMBOL_CALLS_LOCAL (info, tga)
5306 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5307 {
5308 struct plt_entry *ent;
5309 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5310 if (ent->plt.refcount > 0)
5311 break;
5312 if (ent != NULL)
5313 {
5314 tga->root.type = bfd_link_hash_indirect;
5315 tga->root.u.i.link = &opt->root;
5316 ppc_elf_copy_indirect_symbol (info, opt, tga);
5317 opt->mark = 1;
5318 if (opt->dynindx != -1)
5319 {
5320 /* Use __tls_get_addr_opt in dynamic relocations. */
5321 opt->dynindx = -1;
5322 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5323 opt->dynstr_index);
5324 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5325 return FALSE;
5326 }
5327 htab->tls_get_addr = opt;
5328 }
5329 }
5330 }
5331 else
5332 htab->params->no_tls_get_addr_opt = TRUE;
5333 }
5334 if (htab->plt_type == PLT_NEW
5335 && htab->elf.splt != NULL
5336 && htab->elf.splt->output_section != NULL)
5337 {
5338 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5339 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5340 }
5341
5342 return _bfd_elf_tls_setup (obfd, info);
5343 }
5344
5345 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5346 HASH. */
5347
5348 static bfd_boolean
5349 branch_reloc_hash_match (const bfd *ibfd,
5350 const Elf_Internal_Rela *rel,
5351 const struct elf_link_hash_entry *hash)
5352 {
5353 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5354 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5355 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5356
5357 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5358 {
5359 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5360 struct elf_link_hash_entry *h;
5361
5362 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5363 while (h->root.type == bfd_link_hash_indirect
5364 || h->root.type == bfd_link_hash_warning)
5365 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5366 if (h == hash)
5367 return TRUE;
5368 }
5369 return FALSE;
5370 }
5371
5372 /* Run through all the TLS relocs looking for optimization
5373 opportunities. */
5374
5375 bfd_boolean
5376 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5377 struct bfd_link_info *info)
5378 {
5379 bfd *ibfd;
5380 asection *sec;
5381 struct ppc_elf_link_hash_table *htab;
5382 int pass;
5383
5384 if (!bfd_link_executable (info))
5385 return TRUE;
5386
5387 htab = ppc_elf_hash_table (info);
5388 if (htab == NULL)
5389 return FALSE;
5390
5391 /* Make two passes through the relocs. First time check that tls
5392 relocs involved in setting up a tls_get_addr call are indeed
5393 followed by such a call. If they are not, don't do any tls
5394 optimization. On the second pass twiddle tls_mask flags to
5395 notify relocate_section that optimization can be done, and
5396 adjust got and plt refcounts. */
5397 for (pass = 0; pass < 2; ++pass)
5398 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5399 {
5400 Elf_Internal_Sym *locsyms = NULL;
5401 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5402 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5403
5404 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5405 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5406 {
5407 Elf_Internal_Rela *relstart, *rel, *relend;
5408 int expecting_tls_get_addr = 0;
5409
5410 /* Read the relocations. */
5411 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5412 info->keep_memory);
5413 if (relstart == NULL)
5414 return FALSE;
5415
5416 relend = relstart + sec->reloc_count;
5417 for (rel = relstart; rel < relend; rel++)
5418 {
5419 enum elf_ppc_reloc_type r_type;
5420 unsigned long r_symndx;
5421 struct elf_link_hash_entry *h = NULL;
5422 char *tls_mask;
5423 char tls_set, tls_clear;
5424 bfd_boolean is_local;
5425 bfd_signed_vma *got_count;
5426
5427 r_symndx = ELF32_R_SYM (rel->r_info);
5428 if (r_symndx >= symtab_hdr->sh_info)
5429 {
5430 struct elf_link_hash_entry **sym_hashes;
5431
5432 sym_hashes = elf_sym_hashes (ibfd);
5433 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5434 while (h->root.type == bfd_link_hash_indirect
5435 || h->root.type == bfd_link_hash_warning)
5436 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5437 }
5438
5439 is_local = FALSE;
5440 if (h == NULL
5441 || !h->def_dynamic)
5442 is_local = TRUE;
5443
5444 r_type = ELF32_R_TYPE (rel->r_info);
5445 /* If this section has old-style __tls_get_addr calls
5446 without marker relocs, then check that each
5447 __tls_get_addr call reloc is preceded by a reloc
5448 that conceivably belongs to the __tls_get_addr arg
5449 setup insn. If we don't find matching arg setup
5450 relocs, don't do any tls optimization. */
5451 if (pass == 0
5452 && sec->has_tls_get_addr_call
5453 && h != NULL
5454 && h == htab->tls_get_addr
5455 && !expecting_tls_get_addr
5456 && is_branch_reloc (r_type))
5457 {
5458 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5459 "TLS optimization disabled\n",
5460 ibfd, sec, rel->r_offset);
5461 if (elf_section_data (sec)->relocs != relstart)
5462 free (relstart);
5463 return TRUE;
5464 }
5465
5466 expecting_tls_get_addr = 0;
5467 switch (r_type)
5468 {
5469 case R_PPC_GOT_TLSLD16:
5470 case R_PPC_GOT_TLSLD16_LO:
5471 expecting_tls_get_addr = 1;
5472 /* Fall through. */
5473
5474 case R_PPC_GOT_TLSLD16_HI:
5475 case R_PPC_GOT_TLSLD16_HA:
5476 /* These relocs should never be against a symbol
5477 defined in a shared lib. Leave them alone if
5478 that turns out to be the case. */
5479 if (!is_local)
5480 continue;
5481
5482 /* LD -> LE */
5483 tls_set = 0;
5484 tls_clear = TLS_LD;
5485 break;
5486
5487 case R_PPC_GOT_TLSGD16:
5488 case R_PPC_GOT_TLSGD16_LO:
5489 expecting_tls_get_addr = 1;
5490 /* Fall through. */
5491
5492 case R_PPC_GOT_TLSGD16_HI:
5493 case R_PPC_GOT_TLSGD16_HA:
5494 if (is_local)
5495 /* GD -> LE */
5496 tls_set = 0;
5497 else
5498 /* GD -> IE */
5499 tls_set = TLS_TLS | TLS_TPRELGD;
5500 tls_clear = TLS_GD;
5501 break;
5502
5503 case R_PPC_GOT_TPREL16:
5504 case R_PPC_GOT_TPREL16_LO:
5505 case R_PPC_GOT_TPREL16_HI:
5506 case R_PPC_GOT_TPREL16_HA:
5507 if (is_local)
5508 {
5509 /* IE -> LE */
5510 tls_set = 0;
5511 tls_clear = TLS_TPREL;
5512 break;
5513 }
5514 else
5515 continue;
5516
5517 case R_PPC_TLSGD:
5518 case R_PPC_TLSLD:
5519 expecting_tls_get_addr = 2;
5520 tls_set = 0;
5521 tls_clear = 0;
5522 break;
5523
5524 default:
5525 continue;
5526 }
5527
5528 if (pass == 0)
5529 {
5530 if (!expecting_tls_get_addr
5531 || (expecting_tls_get_addr == 1
5532 && !sec->has_tls_get_addr_call))
5533 continue;
5534
5535 if (rel + 1 < relend
5536 && branch_reloc_hash_match (ibfd, rel + 1,
5537 htab->tls_get_addr))
5538 continue;
5539
5540 /* Uh oh, we didn't find the expected call. We
5541 could just mark this symbol to exclude it
5542 from tls optimization but it's safer to skip
5543 the entire optimization. */
5544 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5545 "TLS optimization disabled\n"),
5546 ibfd, sec, rel->r_offset);
5547 if (elf_section_data (sec)->relocs != relstart)
5548 free (relstart);
5549 return TRUE;
5550 }
5551
5552 if (expecting_tls_get_addr)
5553 {
5554 struct plt_entry *ent;
5555 bfd_vma addend = 0;
5556
5557 if (bfd_link_pic (info)
5558 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5559 addend = rel[1].r_addend;
5560 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5561 got2, addend);
5562 if (ent != NULL && ent->plt.refcount > 0)
5563 ent->plt.refcount -= 1;
5564
5565 if (expecting_tls_get_addr == 2)
5566 continue;
5567 }
5568
5569 if (h != NULL)
5570 {
5571 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5572 got_count = &h->got.refcount;
5573 }
5574 else
5575 {
5576 bfd_signed_vma *lgot_refs;
5577 struct plt_entry **local_plt;
5578 char *lgot_masks;
5579
5580 if (locsyms == NULL)
5581 {
5582 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5583 if (locsyms == NULL)
5584 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5585 symtab_hdr->sh_info,
5586 0, NULL, NULL, NULL);
5587 if (locsyms == NULL)
5588 {
5589 if (elf_section_data (sec)->relocs != relstart)
5590 free (relstart);
5591 return FALSE;
5592 }
5593 }
5594 lgot_refs = elf_local_got_refcounts (ibfd);
5595 if (lgot_refs == NULL)
5596 abort ();
5597 local_plt = (struct plt_entry **)
5598 (lgot_refs + symtab_hdr->sh_info);
5599 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5600 tls_mask = &lgot_masks[r_symndx];
5601 got_count = &lgot_refs[r_symndx];
5602 }
5603
5604 if (tls_set == 0)
5605 {
5606 /* We managed to get rid of a got entry. */
5607 if (*got_count > 0)
5608 *got_count -= 1;
5609 }
5610
5611 *tls_mask |= tls_set;
5612 *tls_mask &= ~tls_clear;
5613 }
5614
5615 if (elf_section_data (sec)->relocs != relstart)
5616 free (relstart);
5617 }
5618
5619 if (locsyms != NULL
5620 && (symtab_hdr->contents != (unsigned char *) locsyms))
5621 {
5622 if (!info->keep_memory)
5623 free (locsyms);
5624 else
5625 symtab_hdr->contents = (unsigned char *) locsyms;
5626 }
5627 }
5628 return TRUE;
5629 }
5630 \f
5631 /* Return true if we have dynamic relocs that apply to read-only sections. */
5632
5633 static bfd_boolean
5634 readonly_dynrelocs (struct elf_link_hash_entry *h)
5635 {
5636 struct elf_dyn_relocs *p;
5637
5638 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5639 {
5640 asection *s = p->sec->output_section;
5641
5642 if (s != NULL
5643 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5644 == (SEC_READONLY | SEC_ALLOC)))
5645 return TRUE;
5646 }
5647 return FALSE;
5648 }
5649
5650 /* Adjust a symbol defined by a dynamic object and referenced by a
5651 regular object. The current definition is in some section of the
5652 dynamic object, but we're not including those sections. We have to
5653 change the definition to something the rest of the link can
5654 understand. */
5655
5656 static bfd_boolean
5657 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5658 struct elf_link_hash_entry *h)
5659 {
5660 struct ppc_elf_link_hash_table *htab;
5661 asection *s;
5662
5663 #ifdef DEBUG
5664 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5665 h->root.root.string);
5666 #endif
5667
5668 /* Make sure we know what is going on here. */
5669 htab = ppc_elf_hash_table (info);
5670 BFD_ASSERT (htab->elf.dynobj != NULL
5671 && (h->needs_plt
5672 || h->type == STT_GNU_IFUNC
5673 || h->u.weakdef != NULL
5674 || (h->def_dynamic
5675 && h->ref_regular
5676 && !h->def_regular)));
5677
5678 /* Deal with function syms. */
5679 if (h->type == STT_FUNC
5680 || h->type == STT_GNU_IFUNC
5681 || h->needs_plt)
5682 {
5683 /* Clear procedure linkage table information for any symbol that
5684 won't need a .plt entry. */
5685 struct plt_entry *ent;
5686 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5687 if (ent->plt.refcount > 0)
5688 break;
5689 if (ent == NULL
5690 || (h->type != STT_GNU_IFUNC
5691 && (SYMBOL_CALLS_LOCAL (info, h)
5692 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))))
5693 {
5694 /* A PLT entry is not required/allowed when:
5695
5696 1. We are not using ld.so; because then the PLT entry
5697 can't be set up, so we can't use one. In this case,
5698 ppc_elf_adjust_dynamic_symbol won't even be called.
5699
5700 2. GC has rendered the entry unused.
5701
5702 3. We know for certain that a call to this symbol
5703 will go to this object, or will remain undefined. */
5704 h->plt.plist = NULL;
5705 h->needs_plt = 0;
5706 h->pointer_equality_needed = 0;
5707 }
5708 else
5709 {
5710 /* Taking a function's address in a read/write section
5711 doesn't require us to define the function symbol in the
5712 executable on a plt call stub. A dynamic reloc can
5713 be used instead, giving better runtime performance.
5714 (Calls via that function pointer don't need to bounce
5715 through the plt call stub.) Similarly, use a dynamic
5716 reloc for a weak reference when possible, allowing the
5717 resolution of the symbol to be set at load time rather
5718 than link time. */
5719 if ((h->pointer_equality_needed
5720 || (!h->ref_regular_nonweak && h->non_got_ref))
5721 && !htab->is_vxworks
5722 && !ppc_elf_hash_entry (h)->has_sda_refs
5723 && !readonly_dynrelocs (h))
5724 {
5725 h->pointer_equality_needed = 0;
5726 /* After adjust_dynamic_symbol, non_got_ref set in the
5727 non-pic case means that dyn_relocs for this symbol
5728 should be discarded. */
5729 h->non_got_ref = 0;
5730 }
5731 }
5732 h->protected_def = 0;
5733 return TRUE;
5734 }
5735 else
5736 h->plt.plist = NULL;
5737
5738 /* If this is a weak symbol, and there is a real definition, the
5739 processor independent code will have arranged for us to see the
5740 real definition first, and we can just use the same value. */
5741 if (h->u.weakdef != NULL)
5742 {
5743 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5744 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5745 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5746 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5747 if (ELIMINATE_COPY_RELOCS)
5748 h->non_got_ref = h->u.weakdef->non_got_ref;
5749 return TRUE;
5750 }
5751
5752 /* This is a reference to a symbol defined by a dynamic object which
5753 is not a function. */
5754
5755 /* If we are creating a shared library, we must presume that the
5756 only references to the symbol are via the global offset table.
5757 For such cases we need not do anything here; the relocations will
5758 be handled correctly by relocate_section. */
5759 if (bfd_link_pic (info))
5760 {
5761 h->protected_def = 0;
5762 return TRUE;
5763 }
5764
5765 /* If there are no references to this symbol that do not use the
5766 GOT, we don't need to generate a copy reloc. */
5767 if (!h->non_got_ref)
5768 {
5769 h->protected_def = 0;
5770 return TRUE;
5771 }
5772
5773 /* Protected variables do not work with .dynbss. The copy in
5774 .dynbss won't be used by the shared library with the protected
5775 definition for the variable. Editing to PIC, or text relocations
5776 are preferable to an incorrect program. */
5777 if (h->protected_def)
5778 {
5779 if (ELIMINATE_COPY_RELOCS
5780 && ppc_elf_hash_entry (h)->has_addr16_ha
5781 && ppc_elf_hash_entry (h)->has_addr16_lo
5782 && htab->params->pic_fixup == 0
5783 && info->disable_target_specific_optimizations <= 1)
5784 htab->params->pic_fixup = 1;
5785 h->non_got_ref = 0;
5786 return TRUE;
5787 }
5788
5789 /* If -z nocopyreloc was given, we won't generate them either. */
5790 if (info->nocopyreloc)
5791 {
5792 h->non_got_ref = 0;
5793 return TRUE;
5794 }
5795
5796 /* If we didn't find any dynamic relocs in read-only sections, then
5797 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5798 We can't do this if there are any small data relocations. This
5799 doesn't work on VxWorks, where we can not have dynamic
5800 relocations (other than copy and jump slot relocations) in an
5801 executable. */
5802 if (ELIMINATE_COPY_RELOCS
5803 && !ppc_elf_hash_entry (h)->has_sda_refs
5804 && !htab->is_vxworks
5805 && !h->def_regular
5806 && !readonly_dynrelocs (h))
5807 {
5808 h->non_got_ref = 0;
5809 return TRUE;
5810 }
5811
5812 /* We must allocate the symbol in our .dynbss section, which will
5813 become part of the .bss section of the executable. There will be
5814 an entry for this symbol in the .dynsym section. The dynamic
5815 object will contain position independent code, so all references
5816 from the dynamic object to this symbol will go through the global
5817 offset table. The dynamic linker will use the .dynsym entry to
5818 determine the address it must put in the global offset table, so
5819 both the dynamic object and the regular object will refer to the
5820 same memory location for the variable.
5821
5822 Of course, if the symbol is referenced using SDAREL relocs, we
5823 must instead allocate it in .sbss. */
5824
5825 if (ppc_elf_hash_entry (h)->has_sda_refs)
5826 s = htab->dynsbss;
5827 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5828 s = htab->elf.sdynrelro;
5829 else
5830 s = htab->elf.sdynbss;
5831 BFD_ASSERT (s != NULL);
5832
5833 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5834 copy the initial value out of the dynamic object and into the
5835 runtime process image. We need to remember the offset into the
5836 .rela.bss section we are going to use. */
5837 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5838 {
5839 asection *srel;
5840
5841 if (ppc_elf_hash_entry (h)->has_sda_refs)
5842 srel = htab->relsbss;
5843 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5844 srel = htab->elf.sreldynrelro;
5845 else
5846 srel = htab->elf.srelbss;
5847 BFD_ASSERT (srel != NULL);
5848 srel->size += sizeof (Elf32_External_Rela);
5849 h->needs_copy = 1;
5850 }
5851
5852 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5853 }
5854 \f
5855 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5856 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5857 specifying the addend on the plt relocation. For -fpic code, the sym
5858 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5859 xxxxxxxx.got2.plt_pic32.<callee>. */
5860
5861 static bfd_boolean
5862 add_stub_sym (struct plt_entry *ent,
5863 struct elf_link_hash_entry *h,
5864 struct bfd_link_info *info)
5865 {
5866 struct elf_link_hash_entry *sh;
5867 size_t len1, len2, len3;
5868 char *name;
5869 const char *stub;
5870 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5871
5872 if (bfd_link_pic (info))
5873 stub = ".plt_pic32.";
5874 else
5875 stub = ".plt_call32.";
5876
5877 len1 = strlen (h->root.root.string);
5878 len2 = strlen (stub);
5879 len3 = 0;
5880 if (ent->sec)
5881 len3 = strlen (ent->sec->name);
5882 name = bfd_malloc (len1 + len2 + len3 + 9);
5883 if (name == NULL)
5884 return FALSE;
5885 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5886 if (ent->sec)
5887 memcpy (name + 8, ent->sec->name, len3);
5888 memcpy (name + 8 + len3, stub, len2);
5889 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5890 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5891 if (sh == NULL)
5892 return FALSE;
5893 if (sh->root.type == bfd_link_hash_new)
5894 {
5895 sh->root.type = bfd_link_hash_defined;
5896 sh->root.u.def.section = htab->glink;
5897 sh->root.u.def.value = ent->glink_offset;
5898 sh->ref_regular = 1;
5899 sh->def_regular = 1;
5900 sh->ref_regular_nonweak = 1;
5901 sh->forced_local = 1;
5902 sh->non_elf = 0;
5903 sh->root.linker_def = 1;
5904 }
5905 return TRUE;
5906 }
5907
5908 /* Allocate NEED contiguous space in .got, and return the offset.
5909 Handles allocation of the got header when crossing 32k. */
5910
5911 static bfd_vma
5912 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5913 {
5914 bfd_vma where;
5915 unsigned int max_before_header;
5916
5917 if (htab->plt_type == PLT_VXWORKS)
5918 {
5919 where = htab->elf.sgot->size;
5920 htab->elf.sgot->size += need;
5921 }
5922 else
5923 {
5924 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5925 if (need <= htab->got_gap)
5926 {
5927 where = max_before_header - htab->got_gap;
5928 htab->got_gap -= need;
5929 }
5930 else
5931 {
5932 if (htab->elf.sgot->size + need > max_before_header
5933 && htab->elf.sgot->size <= max_before_header)
5934 {
5935 htab->got_gap = max_before_header - htab->elf.sgot->size;
5936 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5937 }
5938 where = htab->elf.sgot->size;
5939 htab->elf.sgot->size += need;
5940 }
5941 }
5942 return where;
5943 }
5944
5945 /* If H is undefined weak, make it dynamic if that makes sense. */
5946
5947 static bfd_boolean
5948 ensure_undefweak_dynamic (struct bfd_link_info *info,
5949 struct elf_link_hash_entry *h)
5950 {
5951 struct elf_link_hash_table *htab = elf_hash_table (info);
5952
5953 if (htab->dynamic_sections_created
5954 && info->dynamic_undefined_weak != 0
5955 && h->root.type == bfd_link_hash_undefweak
5956 && h->dynindx == -1
5957 && !h->forced_local
5958 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5959 return bfd_elf_link_record_dynamic_symbol (info, h);
5960 return TRUE;
5961 }
5962
5963 /* Allocate space in associated reloc sections for dynamic relocs. */
5964
5965 static bfd_boolean
5966 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5967 {
5968 struct bfd_link_info *info = inf;
5969 struct ppc_elf_link_hash_entry *eh;
5970 struct ppc_elf_link_hash_table *htab;
5971 struct elf_dyn_relocs *p;
5972 bfd_boolean dyn;
5973
5974 if (h->root.type == bfd_link_hash_indirect)
5975 return TRUE;
5976
5977 htab = ppc_elf_hash_table (info);
5978 eh = (struct ppc_elf_link_hash_entry *) h;
5979 if (eh->elf.got.refcount > 0
5980 || (ELIMINATE_COPY_RELOCS
5981 && !eh->elf.def_regular
5982 && eh->elf.protected_def
5983 && eh->has_addr16_ha
5984 && eh->has_addr16_lo
5985 && htab->params->pic_fixup > 0))
5986 {
5987 unsigned int need;
5988
5989 /* Make sure this symbol is output as a dynamic symbol.
5990 Undefined weak syms won't yet be marked as dynamic. */
5991 if (!ensure_undefweak_dynamic (info, &eh->elf))
5992 return FALSE;
5993
5994 need = 0;
5995 if ((eh->tls_mask & TLS_TLS) != 0)
5996 {
5997 if ((eh->tls_mask & TLS_LD) != 0)
5998 {
5999 if (!eh->elf.def_dynamic)
6000 /* We'll just use htab->tlsld_got.offset. This should
6001 always be the case. It's a little odd if we have
6002 a local dynamic reloc against a non-local symbol. */
6003 htab->tlsld_got.refcount += 1;
6004 else
6005 need += 8;
6006 }
6007 if ((eh->tls_mask & TLS_GD) != 0)
6008 need += 8;
6009 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6010 need += 4;
6011 if ((eh->tls_mask & TLS_DTPREL) != 0)
6012 need += 4;
6013 }
6014 else
6015 need += 4;
6016 if (need == 0)
6017 eh->elf.got.offset = (bfd_vma) -1;
6018 else
6019 {
6020 eh->elf.got.offset = allocate_got (htab, need);
6021 if ((bfd_link_pic (info)
6022 || (htab->elf.dynamic_sections_created
6023 && eh->elf.dynindx != -1
6024 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6025 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6026 {
6027 asection *rsec = htab->elf.srelgot;
6028
6029 if (eh->elf.type == STT_GNU_IFUNC)
6030 rsec = htab->elf.irelplt;
6031 /* All the entries we allocated need relocs.
6032 Except LD only needs one. */
6033 if ((eh->tls_mask & TLS_LD) != 0
6034 && eh->elf.def_dynamic)
6035 need -= 4;
6036 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6037 }
6038 }
6039 }
6040 else
6041 eh->elf.got.offset = (bfd_vma) -1;
6042
6043 /* If no dynamic sections we can't have dynamic relocs, except for
6044 IFUNCs which are handled even in static executables. */
6045 if (!htab->elf.dynamic_sections_created
6046 && h->type != STT_GNU_IFUNC)
6047 eh->dyn_relocs = NULL;
6048
6049 if (eh->dyn_relocs == NULL)
6050 ;
6051
6052 /* In the shared -Bsymbolic case, discard space allocated for
6053 dynamic pc-relative relocs against symbols which turn out to be
6054 defined in regular objects. For the normal shared case, discard
6055 space for relocs that have become local due to symbol visibility
6056 changes. */
6057 else if (bfd_link_pic (info))
6058 {
6059 /* Discard relocs on undefined symbols that must be local. */
6060 if (h->root.type == bfd_link_hash_undefined
6061 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6062 eh->dyn_relocs = NULL;
6063
6064 /* Also discard relocs on undefined weak syms with non-default
6065 visibility, or when dynamic_undefined_weak says so. */
6066 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6067 eh->dyn_relocs = NULL;
6068
6069 /* Relocs that use pc_count are those that appear on a call insn,
6070 or certain REL relocs (see must_be_dyn_reloc) that can be
6071 generated via assembly. We want calls to protected symbols to
6072 resolve directly to the function rather than going via the plt.
6073 If people want function pointer comparisons to work as expected
6074 then they should avoid writing weird assembly. */
6075 else if (SYMBOL_CALLS_LOCAL (info, h))
6076 {
6077 struct elf_dyn_relocs **pp;
6078
6079 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6080 {
6081 p->count -= p->pc_count;
6082 p->pc_count = 0;
6083 if (p->count == 0)
6084 *pp = p->next;
6085 else
6086 pp = &p->next;
6087 }
6088 }
6089
6090 if (htab->is_vxworks)
6091 {
6092 struct elf_dyn_relocs **pp;
6093
6094 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6095 {
6096 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6097 *pp = p->next;
6098 else
6099 pp = &p->next;
6100 }
6101 }
6102
6103 if (eh->dyn_relocs != NULL)
6104 {
6105 /* Make sure undefined weak symbols are output as a dynamic
6106 symbol in PIEs. */
6107 if (!ensure_undefweak_dynamic (info, h))
6108 return FALSE;
6109 }
6110 }
6111 else if (ELIMINATE_COPY_RELOCS)
6112 {
6113 /* For the non-pic case, discard space for relocs against
6114 symbols which turn out to need copy relocs or are not
6115 dynamic. */
6116 if (!h->non_got_ref
6117 && !h->def_regular
6118 && !(h->protected_def
6119 && eh->has_addr16_ha
6120 && eh->has_addr16_lo
6121 && htab->params->pic_fixup > 0))
6122 {
6123 /* Make sure this symbol is output as a dynamic symbol.
6124 Undefined weak syms won't yet be marked as dynamic. */
6125 if (!ensure_undefweak_dynamic (info, h))
6126 return FALSE;
6127
6128 if (h->dynindx == -1)
6129 eh->dyn_relocs = NULL;
6130 }
6131 else
6132 eh->dyn_relocs = NULL;
6133 }
6134
6135 /* Allocate space. */
6136 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6137 {
6138 asection *sreloc = elf_section_data (p->sec)->sreloc;
6139 if (eh->elf.type == STT_GNU_IFUNC)
6140 sreloc = htab->elf.irelplt;
6141 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6142 }
6143
6144 /* Handle PLT relocs. Done last, after dynindx has settled. */
6145 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6146 if (dyn || h->type == STT_GNU_IFUNC)
6147 {
6148 struct plt_entry *ent;
6149 bfd_boolean doneone = FALSE;
6150 bfd_vma plt_offset = 0, glink_offset = 0;
6151
6152 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6153 if (ent->plt.refcount > 0)
6154 {
6155 asection *s = htab->elf.splt;
6156
6157 if (!dyn)
6158 s = htab->elf.iplt;
6159
6160 if (htab->plt_type == PLT_NEW || !dyn)
6161 {
6162 if (!doneone)
6163 {
6164 plt_offset = s->size;
6165 s->size += 4;
6166 }
6167 ent->plt.offset = plt_offset;
6168
6169 s = htab->glink;
6170 if (!doneone || bfd_link_pic (info))
6171 {
6172 glink_offset = s->size;
6173 s->size += GLINK_ENTRY_SIZE;
6174 if (h == htab->tls_get_addr
6175 && !htab->params->no_tls_get_addr_opt)
6176 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6177 }
6178 if (!doneone
6179 && !bfd_link_pic (info)
6180 && h->def_dynamic
6181 && !h->def_regular)
6182 {
6183 h->root.u.def.section = s;
6184 h->root.u.def.value = glink_offset;
6185 }
6186 ent->glink_offset = glink_offset;
6187
6188 if (htab->params->emit_stub_syms
6189 && !add_stub_sym (ent, h, info))
6190 return FALSE;
6191 }
6192 else
6193 {
6194 if (!doneone)
6195 {
6196 /* If this is the first .plt entry, make room
6197 for the special first entry. */
6198 if (s->size == 0)
6199 s->size += htab->plt_initial_entry_size;
6200
6201 /* The PowerPC PLT is actually composed of two
6202 parts, the first part is 2 words (for a load
6203 and a jump), and then there is a remaining
6204 word available at the end. */
6205 plt_offset = (htab->plt_initial_entry_size
6206 + (htab->plt_slot_size
6207 * ((s->size
6208 - htab->plt_initial_entry_size)
6209 / htab->plt_entry_size)));
6210
6211 /* If this symbol is not defined in a regular
6212 file, and we are not generating a shared
6213 library, then set the symbol to this location
6214 in the .plt. This is to avoid text
6215 relocations, and is required to make
6216 function pointers compare as equal between
6217 the normal executable and the shared library. */
6218 if (! bfd_link_pic (info)
6219 && h->def_dynamic
6220 && !h->def_regular)
6221 {
6222 h->root.u.def.section = s;
6223 h->root.u.def.value = plt_offset;
6224 }
6225
6226 /* Make room for this entry. */
6227 s->size += htab->plt_entry_size;
6228 /* After the 8192nd entry, room for two entries
6229 is allocated. */
6230 if (htab->plt_type == PLT_OLD
6231 && (s->size - htab->plt_initial_entry_size)
6232 / htab->plt_entry_size
6233 > PLT_NUM_SINGLE_ENTRIES)
6234 s->size += htab->plt_entry_size;
6235 }
6236 ent->plt.offset = plt_offset;
6237 }
6238
6239 /* We also need to make an entry in the .rela.plt section. */
6240 if (!doneone)
6241 {
6242 if (!dyn)
6243 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6244 else
6245 {
6246 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6247
6248 if (htab->plt_type == PLT_VXWORKS)
6249 {
6250 /* Allocate space for the unloaded relocations. */
6251 if (!bfd_link_pic (info)
6252 && htab->elf.dynamic_sections_created)
6253 {
6254 if (ent->plt.offset
6255 == (bfd_vma) htab->plt_initial_entry_size)
6256 {
6257 htab->srelplt2->size
6258 += (sizeof (Elf32_External_Rela)
6259 * VXWORKS_PLTRESOLVE_RELOCS);
6260 }
6261
6262 htab->srelplt2->size
6263 += (sizeof (Elf32_External_Rela)
6264 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6265 }
6266
6267 /* Every PLT entry has an associated GOT entry in
6268 .got.plt. */
6269 htab->elf.sgotplt->size += 4;
6270 }
6271 }
6272 doneone = TRUE;
6273 }
6274 }
6275 else
6276 ent->plt.offset = (bfd_vma) -1;
6277
6278 if (!doneone)
6279 {
6280 h->plt.plist = NULL;
6281 h->needs_plt = 0;
6282 }
6283 }
6284 else
6285 {
6286 h->plt.plist = NULL;
6287 h->needs_plt = 0;
6288 }
6289
6290 return TRUE;
6291 }
6292
6293 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6294 read-only sections. */
6295
6296 static bfd_boolean
6297 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6298 {
6299 if (h->root.type == bfd_link_hash_indirect)
6300 return TRUE;
6301
6302 if (readonly_dynrelocs (h))
6303 {
6304 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6305
6306 /* Not an error, just cut short the traversal. */
6307 return FALSE;
6308 }
6309 return TRUE;
6310 }
6311
6312 static const unsigned char glink_eh_frame_cie[] =
6313 {
6314 0, 0, 0, 16, /* length. */
6315 0, 0, 0, 0, /* id. */
6316 1, /* CIE version. */
6317 'z', 'R', 0, /* Augmentation string. */
6318 4, /* Code alignment. */
6319 0x7c, /* Data alignment. */
6320 65, /* RA reg. */
6321 1, /* Augmentation size. */
6322 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6323 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6324 };
6325
6326 /* Set the sizes of the dynamic sections. */
6327
6328 static bfd_boolean
6329 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6330 struct bfd_link_info *info)
6331 {
6332 struct ppc_elf_link_hash_table *htab;
6333 asection *s;
6334 bfd_boolean relocs;
6335 bfd *ibfd;
6336
6337 #ifdef DEBUG
6338 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6339 #endif
6340
6341 htab = ppc_elf_hash_table (info);
6342 BFD_ASSERT (htab->elf.dynobj != NULL);
6343
6344 if (elf_hash_table (info)->dynamic_sections_created)
6345 {
6346 /* Set the contents of the .interp section to the interpreter. */
6347 if (bfd_link_executable (info) && !info->nointerp)
6348 {
6349 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6350 BFD_ASSERT (s != NULL);
6351 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6352 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6353 }
6354 }
6355
6356 if (htab->plt_type == PLT_OLD)
6357 htab->got_header_size = 16;
6358 else if (htab->plt_type == PLT_NEW)
6359 htab->got_header_size = 12;
6360
6361 /* Set up .got offsets for local syms, and space for local dynamic
6362 relocs. */
6363 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6364 {
6365 bfd_signed_vma *local_got;
6366 bfd_signed_vma *end_local_got;
6367 struct plt_entry **local_plt;
6368 struct plt_entry **end_local_plt;
6369 char *lgot_masks;
6370 bfd_size_type locsymcount;
6371 Elf_Internal_Shdr *symtab_hdr;
6372
6373 if (!is_ppc_elf (ibfd))
6374 continue;
6375
6376 for (s = ibfd->sections; s != NULL; s = s->next)
6377 {
6378 struct ppc_dyn_relocs *p;
6379
6380 for (p = ((struct ppc_dyn_relocs *)
6381 elf_section_data (s)->local_dynrel);
6382 p != NULL;
6383 p = p->next)
6384 {
6385 if (!bfd_is_abs_section (p->sec)
6386 && bfd_is_abs_section (p->sec->output_section))
6387 {
6388 /* Input section has been discarded, either because
6389 it is a copy of a linkonce section or due to
6390 linker script /DISCARD/, so we'll be discarding
6391 the relocs too. */
6392 }
6393 else if (htab->is_vxworks
6394 && strcmp (p->sec->output_section->name,
6395 ".tls_vars") == 0)
6396 {
6397 /* Relocations in vxworks .tls_vars sections are
6398 handled specially by the loader. */
6399 }
6400 else if (p->count != 0)
6401 {
6402 asection *sreloc = elf_section_data (p->sec)->sreloc;
6403 if (p->ifunc)
6404 sreloc = htab->elf.irelplt;
6405 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6406 if ((p->sec->output_section->flags
6407 & (SEC_READONLY | SEC_ALLOC))
6408 == (SEC_READONLY | SEC_ALLOC))
6409 info->flags |= DF_TEXTREL;
6410 }
6411 }
6412 }
6413
6414 local_got = elf_local_got_refcounts (ibfd);
6415 if (!local_got)
6416 continue;
6417
6418 symtab_hdr = &elf_symtab_hdr (ibfd);
6419 locsymcount = symtab_hdr->sh_info;
6420 end_local_got = local_got + locsymcount;
6421 local_plt = (struct plt_entry **) end_local_got;
6422 end_local_plt = local_plt + locsymcount;
6423 lgot_masks = (char *) end_local_plt;
6424
6425 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6426 if (*local_got > 0)
6427 {
6428 unsigned int need = 0;
6429 if ((*lgot_masks & TLS_TLS) != 0)
6430 {
6431 if ((*lgot_masks & TLS_GD) != 0)
6432 need += 8;
6433 if ((*lgot_masks & TLS_LD) != 0)
6434 htab->tlsld_got.refcount += 1;
6435 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6436 need += 4;
6437 if ((*lgot_masks & TLS_DTPREL) != 0)
6438 need += 4;
6439 }
6440 else
6441 need += 4;
6442 if (need == 0)
6443 *local_got = (bfd_vma) -1;
6444 else
6445 {
6446 *local_got = allocate_got (htab, need);
6447 if (bfd_link_pic (info))
6448 {
6449 asection *srel = htab->elf.srelgot;
6450 if ((*lgot_masks & PLT_IFUNC) != 0)
6451 srel = htab->elf.irelplt;
6452 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6453 }
6454 }
6455 }
6456 else
6457 *local_got = (bfd_vma) -1;
6458
6459 if (htab->is_vxworks)
6460 continue;
6461
6462 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6463 for (; local_plt < end_local_plt; ++local_plt)
6464 {
6465 struct plt_entry *ent;
6466 bfd_boolean doneone = FALSE;
6467 bfd_vma plt_offset = 0, glink_offset = 0;
6468
6469 for (ent = *local_plt; ent != NULL; ent = ent->next)
6470 if (ent->plt.refcount > 0)
6471 {
6472 s = htab->elf.iplt;
6473
6474 if (!doneone)
6475 {
6476 plt_offset = s->size;
6477 s->size += 4;
6478 }
6479 ent->plt.offset = plt_offset;
6480
6481 s = htab->glink;
6482 if (!doneone || bfd_link_pic (info))
6483 {
6484 glink_offset = s->size;
6485 s->size += GLINK_ENTRY_SIZE;
6486 }
6487 ent->glink_offset = glink_offset;
6488
6489 if (!doneone)
6490 {
6491 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6492 doneone = TRUE;
6493 }
6494 }
6495 else
6496 ent->plt.offset = (bfd_vma) -1;
6497 }
6498 }
6499
6500 /* Allocate space for global sym dynamic relocs. */
6501 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6502
6503 if (htab->tlsld_got.refcount > 0)
6504 {
6505 htab->tlsld_got.offset = allocate_got (htab, 8);
6506 if (bfd_link_pic (info))
6507 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6508 }
6509 else
6510 htab->tlsld_got.offset = (bfd_vma) -1;
6511
6512 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6513 {
6514 unsigned int g_o_t = 32768;
6515
6516 /* If we haven't allocated the header, do so now. When we get here,
6517 for old plt/got the got size will be 0 to 32764 (not allocated),
6518 or 32780 to 65536 (header allocated). For new plt/got, the
6519 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6520 if (htab->elf.sgot->size <= 32768)
6521 {
6522 g_o_t = htab->elf.sgot->size;
6523 if (htab->plt_type == PLT_OLD)
6524 g_o_t += 4;
6525 htab->elf.sgot->size += htab->got_header_size;
6526 }
6527
6528 htab->elf.hgot->root.u.def.value = g_o_t;
6529 }
6530 if (bfd_link_pic (info))
6531 {
6532 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6533
6534 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6535 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6536 }
6537 if (info->emitrelocations)
6538 {
6539 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6540
6541 if (sda != NULL && sda->ref_regular)
6542 sda->root.u.def.section->flags |= SEC_KEEP;
6543 sda = htab->sdata[1].sym;
6544 if (sda != NULL && sda->ref_regular)
6545 sda->root.u.def.section->flags |= SEC_KEEP;
6546 }
6547
6548 if (htab->glink != NULL
6549 && htab->glink->size != 0
6550 && htab->elf.dynamic_sections_created)
6551 {
6552 htab->glink_pltresolve = htab->glink->size;
6553 /* Space for the branch table. ??? We don't need entries for
6554 non-dynamic symbols in this table. This case can arise with
6555 static ifuncs or forced local ifuncs. */
6556 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6557 /* Pad out to align the start of PLTresolve. */
6558 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6559 ? 63 : 15);
6560 htab->glink->size += GLINK_PLTRESOLVE;
6561
6562 if (htab->params->emit_stub_syms)
6563 {
6564 struct elf_link_hash_entry *sh;
6565 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6566 TRUE, FALSE, FALSE);
6567 if (sh == NULL)
6568 return FALSE;
6569 if (sh->root.type == bfd_link_hash_new)
6570 {
6571 sh->root.type = bfd_link_hash_defined;
6572 sh->root.u.def.section = htab->glink;
6573 sh->root.u.def.value = htab->glink_pltresolve;
6574 sh->ref_regular = 1;
6575 sh->def_regular = 1;
6576 sh->ref_regular_nonweak = 1;
6577 sh->forced_local = 1;
6578 sh->non_elf = 0;
6579 sh->root.linker_def = 1;
6580 }
6581 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6582 TRUE, FALSE, FALSE);
6583 if (sh == NULL)
6584 return FALSE;
6585 if (sh->root.type == bfd_link_hash_new)
6586 {
6587 sh->root.type = bfd_link_hash_defined;
6588 sh->root.u.def.section = htab->glink;
6589 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6590 sh->ref_regular = 1;
6591 sh->def_regular = 1;
6592 sh->ref_regular_nonweak = 1;
6593 sh->forced_local = 1;
6594 sh->non_elf = 0;
6595 sh->root.linker_def = 1;
6596 }
6597 }
6598 }
6599
6600 if (htab->glink != NULL
6601 && htab->glink->size != 0
6602 && htab->glink_eh_frame != NULL
6603 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6604 && _bfd_elf_eh_frame_present (info))
6605 {
6606 s = htab->glink_eh_frame;
6607 s->size = sizeof (glink_eh_frame_cie) + 20;
6608 if (bfd_link_pic (info))
6609 {
6610 s->size += 4;
6611 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6612 s->size += 4;
6613 }
6614 }
6615
6616 /* We've now determined the sizes of the various dynamic sections.
6617 Allocate memory for them. */
6618 relocs = FALSE;
6619 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6620 {
6621 bfd_boolean strip_section = TRUE;
6622
6623 if ((s->flags & SEC_LINKER_CREATED) == 0)
6624 continue;
6625
6626 if (s == htab->elf.splt
6627 || s == htab->elf.sgot)
6628 {
6629 /* We'd like to strip these sections if they aren't needed, but if
6630 we've exported dynamic symbols from them we must leave them.
6631 It's too late to tell BFD to get rid of the symbols. */
6632 if (htab->elf.hplt != NULL)
6633 strip_section = FALSE;
6634 /* Strip this section if we don't need it; see the
6635 comment below. */
6636 }
6637 else if (s == htab->elf.iplt
6638 || s == htab->glink
6639 || s == htab->glink_eh_frame
6640 || s == htab->elf.sgotplt
6641 || s == htab->sbss
6642 || s == htab->elf.sdynbss
6643 || s == htab->elf.sdynrelro
6644 || s == htab->dynsbss)
6645 {
6646 /* Strip these too. */
6647 }
6648 else if (s == htab->sdata[0].section
6649 || s == htab->sdata[1].section)
6650 {
6651 strip_section = (s->flags & SEC_KEEP) == 0;
6652 }
6653 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6654 ".rela"))
6655 {
6656 if (s->size != 0)
6657 {
6658 /* Remember whether there are any relocation sections. */
6659 relocs = TRUE;
6660
6661 /* We use the reloc_count field as a counter if we need
6662 to copy relocs into the output file. */
6663 s->reloc_count = 0;
6664 }
6665 }
6666 else
6667 {
6668 /* It's not one of our sections, so don't allocate space. */
6669 continue;
6670 }
6671
6672 if (s->size == 0 && strip_section)
6673 {
6674 /* If we don't need this section, strip it from the
6675 output file. This is mostly to handle .rela.bss and
6676 .rela.plt. We must create both sections in
6677 create_dynamic_sections, because they must be created
6678 before the linker maps input sections to output
6679 sections. The linker does that before
6680 adjust_dynamic_symbol is called, and it is that
6681 function which decides whether anything needs to go
6682 into these sections. */
6683 s->flags |= SEC_EXCLUDE;
6684 continue;
6685 }
6686
6687 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6688 continue;
6689
6690 /* Allocate memory for the section contents. */
6691 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6692 if (s->contents == NULL)
6693 return FALSE;
6694 }
6695
6696 if (htab->elf.dynamic_sections_created)
6697 {
6698 /* Add some entries to the .dynamic section. We fill in the
6699 values later, in ppc_elf_finish_dynamic_sections, but we
6700 must add the entries now so that we get the correct size for
6701 the .dynamic section. The DT_DEBUG entry is filled in by the
6702 dynamic linker and used by the debugger. */
6703 #define add_dynamic_entry(TAG, VAL) \
6704 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6705
6706 if (bfd_link_executable (info))
6707 {
6708 if (!add_dynamic_entry (DT_DEBUG, 0))
6709 return FALSE;
6710 }
6711
6712 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6713 {
6714 if (!add_dynamic_entry (DT_PLTGOT, 0)
6715 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6716 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6717 || !add_dynamic_entry (DT_JMPREL, 0))
6718 return FALSE;
6719 }
6720
6721 if (htab->plt_type == PLT_NEW
6722 && htab->glink != NULL
6723 && htab->glink->size != 0)
6724 {
6725 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6726 return FALSE;
6727 if (!htab->params->no_tls_get_addr_opt
6728 && htab->tls_get_addr != NULL
6729 && htab->tls_get_addr->plt.plist != NULL
6730 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6731 return FALSE;
6732 }
6733
6734 if (relocs)
6735 {
6736 if (!add_dynamic_entry (DT_RELA, 0)
6737 || !add_dynamic_entry (DT_RELASZ, 0)
6738 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6739 return FALSE;
6740 }
6741
6742 /* If any dynamic relocs apply to a read-only section, then we
6743 need a DT_TEXTREL entry. */
6744 if ((info->flags & DF_TEXTREL) == 0)
6745 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6746 info);
6747
6748 if ((info->flags & DF_TEXTREL) != 0)
6749 {
6750 if (!add_dynamic_entry (DT_TEXTREL, 0))
6751 return FALSE;
6752 }
6753 if (htab->is_vxworks
6754 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6755 return FALSE;
6756 }
6757 #undef add_dynamic_entry
6758
6759 if (htab->glink_eh_frame != NULL
6760 && htab->glink_eh_frame->contents != NULL)
6761 {
6762 unsigned char *p = htab->glink_eh_frame->contents;
6763 bfd_vma val;
6764
6765 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6766 /* CIE length (rewrite in case little-endian). */
6767 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6768 p += sizeof (glink_eh_frame_cie);
6769 /* FDE length. */
6770 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6771 bfd_put_32 (htab->elf.dynobj, val, p);
6772 p += 4;
6773 /* CIE pointer. */
6774 val = p - htab->glink_eh_frame->contents;
6775 bfd_put_32 (htab->elf.dynobj, val, p);
6776 p += 4;
6777 /* Offset to .glink. Set later. */
6778 p += 4;
6779 /* .glink size. */
6780 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6781 p += 4;
6782 /* Augmentation. */
6783 p += 1;
6784
6785 if (bfd_link_pic (info)
6786 && htab->elf.dynamic_sections_created)
6787 {
6788 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6789 if (adv < 64)
6790 *p++ = DW_CFA_advance_loc + adv;
6791 else if (adv < 256)
6792 {
6793 *p++ = DW_CFA_advance_loc1;
6794 *p++ = adv;
6795 }
6796 else if (adv < 65536)
6797 {
6798 *p++ = DW_CFA_advance_loc2;
6799 bfd_put_16 (htab->elf.dynobj, adv, p);
6800 p += 2;
6801 }
6802 else
6803 {
6804 *p++ = DW_CFA_advance_loc4;
6805 bfd_put_32 (htab->elf.dynobj, adv, p);
6806 p += 4;
6807 }
6808 *p++ = DW_CFA_register;
6809 *p++ = 65;
6810 p++;
6811 *p++ = DW_CFA_advance_loc + 4;
6812 *p++ = DW_CFA_restore_extended;
6813 *p++ = 65;
6814 }
6815 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6816 == htab->glink_eh_frame->size);
6817 }
6818
6819 return TRUE;
6820 }
6821
6822 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6823 if it looks like nothing is using them. */
6824
6825 static void
6826 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6827 {
6828 struct elf_link_hash_entry *sda = lsect->sym;
6829
6830 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6831 {
6832 asection *s;
6833
6834 s = bfd_get_section_by_name (output_bfd, lsect->name);
6835 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6836 {
6837 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6838 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6839 {
6840 sda->def_regular = 0;
6841 /* This is somewhat magic. See elf_link_output_extsym. */
6842 sda->ref_dynamic = 1;
6843 sda->forced_local = 0;
6844 }
6845 }
6846 }
6847 }
6848
6849 void
6850 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6851 {
6852 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6853
6854 if (htab != NULL)
6855 {
6856 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6857 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6858 }
6859 }
6860
6861
6862 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6863
6864 static bfd_boolean
6865 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6866 {
6867 if (h->plt.plist != NULL
6868 && !h->def_regular
6869 && (!h->pointer_equality_needed
6870 || !h->ref_regular_nonweak))
6871 return FALSE;
6872
6873 return _bfd_elf_hash_symbol (h);
6874 }
6875 \f
6876 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6877
6878 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6879 used for some functions that are allowed to break the ABI). */
6880 static const int shared_stub_entry[] =
6881 {
6882 0x7c0802a6, /* mflr 0 */
6883 0x429f0005, /* bcl 20, 31, .Lxxx */
6884 0x7d8802a6, /* mflr 12 */
6885 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6886 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6887 0x7c0803a6, /* mtlr 0 */
6888 0x7d8903a6, /* mtctr 12 */
6889 0x4e800420, /* bctr */
6890 };
6891
6892 static const int stub_entry[] =
6893 {
6894 0x3d800000, /* lis 12,xxx@ha */
6895 0x398c0000, /* addi 12,12,xxx@l */
6896 0x7d8903a6, /* mtctr 12 */
6897 0x4e800420, /* bctr */
6898 };
6899
6900 struct ppc_elf_relax_info
6901 {
6902 unsigned int workaround_size;
6903 unsigned int picfixup_size;
6904 };
6905
6906 /* This function implements long branch trampolines, and the ppc476
6907 icache bug workaround. Any section needing trampolines or patch
6908 space for the workaround has its size extended so that we can
6909 add trampolines at the end of the section. */
6910
6911 static bfd_boolean
6912 ppc_elf_relax_section (bfd *abfd,
6913 asection *isec,
6914 struct bfd_link_info *link_info,
6915 bfd_boolean *again)
6916 {
6917 struct one_branch_fixup
6918 {
6919 struct one_branch_fixup *next;
6920 asection *tsec;
6921 /* Final link, can use the symbol offset. For a
6922 relocatable link we use the symbol's index. */
6923 bfd_vma toff;
6924 bfd_vma trampoff;
6925 };
6926
6927 Elf_Internal_Shdr *symtab_hdr;
6928 bfd_byte *contents = NULL;
6929 Elf_Internal_Sym *isymbuf = NULL;
6930 Elf_Internal_Rela *internal_relocs = NULL;
6931 Elf_Internal_Rela *irel, *irelend = NULL;
6932 struct one_branch_fixup *branch_fixups = NULL;
6933 struct ppc_elf_relax_info *relax_info = NULL;
6934 unsigned changes = 0;
6935 bfd_boolean workaround_change;
6936 struct ppc_elf_link_hash_table *htab;
6937 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6938 asection *got2;
6939 bfd_boolean maybe_pasted;
6940
6941 *again = FALSE;
6942
6943 /* No need to do anything with non-alloc or non-code sections. */
6944 if ((isec->flags & SEC_ALLOC) == 0
6945 || (isec->flags & SEC_CODE) == 0
6946 || (isec->flags & SEC_LINKER_CREATED) != 0
6947 || isec->size < 4)
6948 return TRUE;
6949
6950 /* We cannot represent the required PIC relocs in the output, so don't
6951 do anything. The linker doesn't support mixing -shared and -r
6952 anyway. */
6953 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6954 return TRUE;
6955
6956 htab = ppc_elf_hash_table (link_info);
6957 if (htab == NULL)
6958 return TRUE;
6959
6960 isec->size = (isec->size + 3) & -4;
6961 if (isec->rawsize == 0)
6962 isec->rawsize = isec->size;
6963 trampbase = isec->size;
6964
6965 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6966 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6967 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6968
6969 if (htab->params->ppc476_workaround
6970 || htab->params->pic_fixup > 0)
6971 {
6972 if (elf_section_data (isec)->sec_info == NULL)
6973 {
6974 elf_section_data (isec)->sec_info
6975 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6976 if (elf_section_data (isec)->sec_info == NULL)
6977 return FALSE;
6978 }
6979 relax_info = elf_section_data (isec)->sec_info;
6980 trampbase -= relax_info->workaround_size;
6981 }
6982
6983 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6984 || strcmp (isec->output_section->name, ".fini") == 0);
6985 /* Space for a branch around any trampolines. */
6986 trampoff = trampbase;
6987 if (maybe_pasted && trampbase == isec->rawsize)
6988 trampoff += 4;
6989
6990 symtab_hdr = &elf_symtab_hdr (abfd);
6991 picfixup_size = 0;
6992 if (htab->params->branch_trampolines
6993 || htab->params->pic_fixup > 0)
6994 {
6995 /* Get a copy of the native relocations. */
6996 if (isec->reloc_count != 0)
6997 {
6998 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6999 link_info->keep_memory);
7000 if (internal_relocs == NULL)
7001 goto error_return;
7002 }
7003
7004 got2 = bfd_get_section_by_name (abfd, ".got2");
7005
7006 irelend = internal_relocs + isec->reloc_count;
7007 for (irel = internal_relocs; irel < irelend; irel++)
7008 {
7009 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7010 bfd_vma toff, roff;
7011 asection *tsec;
7012 struct one_branch_fixup *f;
7013 size_t insn_offset = 0;
7014 bfd_vma max_branch_offset = 0, val;
7015 bfd_byte *hit_addr;
7016 unsigned long t0;
7017 struct elf_link_hash_entry *h;
7018 struct plt_entry **plist;
7019 unsigned char sym_type;
7020
7021 switch (r_type)
7022 {
7023 case R_PPC_REL24:
7024 case R_PPC_LOCAL24PC:
7025 case R_PPC_PLTREL24:
7026 max_branch_offset = 1 << 25;
7027 break;
7028
7029 case R_PPC_REL14:
7030 case R_PPC_REL14_BRTAKEN:
7031 case R_PPC_REL14_BRNTAKEN:
7032 max_branch_offset = 1 << 15;
7033 break;
7034
7035 case R_PPC_ADDR16_HA:
7036 if (htab->params->pic_fixup > 0)
7037 break;
7038 continue;
7039
7040 default:
7041 continue;
7042 }
7043
7044 /* Get the value of the symbol referred to by the reloc. */
7045 h = NULL;
7046 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7047 {
7048 /* A local symbol. */
7049 Elf_Internal_Sym *isym;
7050
7051 /* Read this BFD's local symbols. */
7052 if (isymbuf == NULL)
7053 {
7054 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7055 if (isymbuf == NULL)
7056 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7057 symtab_hdr->sh_info, 0,
7058 NULL, NULL, NULL);
7059 if (isymbuf == 0)
7060 goto error_return;
7061 }
7062 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7063 if (isym->st_shndx == SHN_UNDEF)
7064 tsec = bfd_und_section_ptr;
7065 else if (isym->st_shndx == SHN_ABS)
7066 tsec = bfd_abs_section_ptr;
7067 else if (isym->st_shndx == SHN_COMMON)
7068 tsec = bfd_com_section_ptr;
7069 else
7070 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7071
7072 toff = isym->st_value;
7073 sym_type = ELF_ST_TYPE (isym->st_info);
7074 }
7075 else
7076 {
7077 /* Global symbol handling. */
7078 unsigned long indx;
7079
7080 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7081 h = elf_sym_hashes (abfd)[indx];
7082
7083 while (h->root.type == bfd_link_hash_indirect
7084 || h->root.type == bfd_link_hash_warning)
7085 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7086
7087 if (h->root.type == bfd_link_hash_defined
7088 || h->root.type == bfd_link_hash_defweak)
7089 {
7090 tsec = h->root.u.def.section;
7091 toff = h->root.u.def.value;
7092 }
7093 else if (h->root.type == bfd_link_hash_undefined
7094 || h->root.type == bfd_link_hash_undefweak)
7095 {
7096 tsec = bfd_und_section_ptr;
7097 toff = bfd_link_relocatable (link_info) ? indx : 0;
7098 }
7099 else
7100 continue;
7101
7102 /* If this branch is to __tls_get_addr then we may later
7103 optimise away the call. We won't be needing a long-
7104 branch stub in that case. */
7105 if (bfd_link_executable (link_info)
7106 && h == htab->tls_get_addr
7107 && irel != internal_relocs)
7108 {
7109 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7110 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7111 unsigned int tls_mask = 0;
7112
7113 /* The previous reloc should be one of R_PPC_TLSGD or
7114 R_PPC_TLSLD, or for older object files, a reloc
7115 on the __tls_get_addr arg setup insn. Get tls
7116 mask bits from the symbol on that reloc. */
7117 if (t_symndx < symtab_hdr->sh_info)
7118 {
7119 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7120
7121 if (local_got_offsets != NULL)
7122 {
7123 struct plt_entry **local_plt = (struct plt_entry **)
7124 (local_got_offsets + symtab_hdr->sh_info);
7125 char *lgot_masks = (char *)
7126 (local_plt + symtab_hdr->sh_info);
7127 tls_mask = lgot_masks[t_symndx];
7128 }
7129 }
7130 else
7131 {
7132 struct elf_link_hash_entry *th
7133 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7134
7135 while (th->root.type == bfd_link_hash_indirect
7136 || th->root.type == bfd_link_hash_warning)
7137 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7138
7139 tls_mask
7140 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7141 }
7142
7143 /* The mask bits tell us if the call will be
7144 optimised away. */
7145 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7146 && (t_rtype == R_PPC_TLSGD
7147 || t_rtype == R_PPC_GOT_TLSGD16
7148 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7149 continue;
7150 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7151 && (t_rtype == R_PPC_TLSLD
7152 || t_rtype == R_PPC_GOT_TLSLD16
7153 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7154 continue;
7155 }
7156
7157 sym_type = h->type;
7158 }
7159
7160 if (r_type == R_PPC_ADDR16_HA)
7161 {
7162 if (h != NULL
7163 && !h->def_regular
7164 && h->protected_def
7165 && ppc_elf_hash_entry (h)->has_addr16_ha
7166 && ppc_elf_hash_entry (h)->has_addr16_lo)
7167 picfixup_size += 12;
7168 continue;
7169 }
7170
7171 /* The condition here under which we call find_plt_ent must
7172 match that in relocate_section. If we call find_plt_ent here
7173 but not in relocate_section, or vice versa, then the branch
7174 destination used here may be incorrect. */
7175 plist = NULL;
7176 if (h != NULL)
7177 {
7178 /* We know is_branch_reloc (r_type) is true. */
7179 if (h->type == STT_GNU_IFUNC
7180 || r_type == R_PPC_PLTREL24)
7181 plist = &h->plt.plist;
7182 }
7183 else if (sym_type == STT_GNU_IFUNC
7184 && elf_local_got_offsets (abfd) != NULL)
7185 {
7186 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7187 struct plt_entry **local_plt = (struct plt_entry **)
7188 (local_got_offsets + symtab_hdr->sh_info);
7189 plist = local_plt + ELF32_R_SYM (irel->r_info);
7190 }
7191 if (plist != NULL)
7192 {
7193 bfd_vma addend = 0;
7194 struct plt_entry *ent;
7195
7196 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7197 addend = irel->r_addend;
7198 ent = find_plt_ent (plist, got2, addend);
7199 if (ent != NULL)
7200 {
7201 if (htab->plt_type == PLT_NEW
7202 || h == NULL
7203 || !htab->elf.dynamic_sections_created
7204 || h->dynindx == -1)
7205 {
7206 tsec = htab->glink;
7207 toff = ent->glink_offset;
7208 }
7209 else
7210 {
7211 tsec = htab->elf.splt;
7212 toff = ent->plt.offset;
7213 }
7214 }
7215 }
7216
7217 /* If the branch and target are in the same section, you have
7218 no hope of adding stubs. We'll error out later should the
7219 branch overflow. */
7220 if (tsec == isec)
7221 continue;
7222
7223 /* There probably isn't any reason to handle symbols in
7224 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7225 attribute for a code section, and we are only looking at
7226 branches. However, implement it correctly here as a
7227 reference for other target relax_section functions. */
7228 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7229 {
7230 /* At this stage in linking, no SEC_MERGE symbol has been
7231 adjusted, so all references to such symbols need to be
7232 passed through _bfd_merged_section_offset. (Later, in
7233 relocate_section, all SEC_MERGE symbols *except* for
7234 section symbols have been adjusted.)
7235
7236 gas may reduce relocations against symbols in SEC_MERGE
7237 sections to a relocation against the section symbol when
7238 the original addend was zero. When the reloc is against
7239 a section symbol we should include the addend in the
7240 offset passed to _bfd_merged_section_offset, since the
7241 location of interest is the original symbol. On the
7242 other hand, an access to "sym+addend" where "sym" is not
7243 a section symbol should not include the addend; Such an
7244 access is presumed to be an offset from "sym"; The
7245 location of interest is just "sym". */
7246 if (sym_type == STT_SECTION)
7247 toff += irel->r_addend;
7248
7249 toff
7250 = _bfd_merged_section_offset (abfd, &tsec,
7251 elf_section_data (tsec)->sec_info,
7252 toff);
7253
7254 if (sym_type != STT_SECTION)
7255 toff += irel->r_addend;
7256 }
7257 /* PLTREL24 addends are special. */
7258 else if (r_type != R_PPC_PLTREL24)
7259 toff += irel->r_addend;
7260
7261 /* Attempted -shared link of non-pic code loses. */
7262 if ((!bfd_link_relocatable (link_info)
7263 && tsec == bfd_und_section_ptr)
7264 || tsec->output_section == NULL
7265 || (tsec->owner != NULL
7266 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7267 continue;
7268
7269 roff = irel->r_offset;
7270
7271 /* If the branch is in range, no need to do anything. */
7272 if (tsec != bfd_und_section_ptr
7273 && (!bfd_link_relocatable (link_info)
7274 /* A relocatable link may have sections moved during
7275 final link, so do not presume they remain in range. */
7276 || tsec->output_section == isec->output_section))
7277 {
7278 bfd_vma symaddr, reladdr;
7279
7280 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7281 reladdr = isec->output_section->vma + isec->output_offset + roff;
7282 if (symaddr - reladdr + max_branch_offset
7283 < 2 * max_branch_offset)
7284 continue;
7285 }
7286
7287 /* Look for an existing fixup to this address. */
7288 for (f = branch_fixups; f ; f = f->next)
7289 if (f->tsec == tsec && f->toff == toff)
7290 break;
7291
7292 if (f == NULL)
7293 {
7294 size_t size;
7295 unsigned long stub_rtype;
7296
7297 val = trampoff - roff;
7298 if (val >= max_branch_offset)
7299 /* Oh dear, we can't reach a trampoline. Don't try to add
7300 one. We'll report an error later. */
7301 continue;
7302
7303 if (bfd_link_pic (link_info))
7304 {
7305 size = 4 * ARRAY_SIZE (shared_stub_entry);
7306 insn_offset = 12;
7307 }
7308 else
7309 {
7310 size = 4 * ARRAY_SIZE (stub_entry);
7311 insn_offset = 0;
7312 }
7313 stub_rtype = R_PPC_RELAX;
7314 if (tsec == htab->elf.splt
7315 || tsec == htab->glink)
7316 {
7317 stub_rtype = R_PPC_RELAX_PLT;
7318 if (r_type == R_PPC_PLTREL24)
7319 stub_rtype = R_PPC_RELAX_PLTREL24;
7320 }
7321
7322 /* Hijack the old relocation. Since we need two
7323 relocations for this use a "composite" reloc. */
7324 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7325 stub_rtype);
7326 irel->r_offset = trampoff + insn_offset;
7327 if (r_type == R_PPC_PLTREL24
7328 && stub_rtype != R_PPC_RELAX_PLTREL24)
7329 irel->r_addend = 0;
7330
7331 /* Record the fixup so we don't do it again this section. */
7332 f = bfd_malloc (sizeof (*f));
7333 f->next = branch_fixups;
7334 f->tsec = tsec;
7335 f->toff = toff;
7336 f->trampoff = trampoff;
7337 branch_fixups = f;
7338
7339 trampoff += size;
7340 changes++;
7341 }
7342 else
7343 {
7344 val = f->trampoff - roff;
7345 if (val >= max_branch_offset)
7346 continue;
7347
7348 /* Nop out the reloc, since we're finalizing things here. */
7349 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7350 }
7351
7352 /* Get the section contents. */
7353 if (contents == NULL)
7354 {
7355 /* Get cached copy if it exists. */
7356 if (elf_section_data (isec)->this_hdr.contents != NULL)
7357 contents = elf_section_data (isec)->this_hdr.contents;
7358 /* Go get them off disk. */
7359 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7360 goto error_return;
7361 }
7362
7363 /* Fix up the existing branch to hit the trampoline. */
7364 hit_addr = contents + roff;
7365 switch (r_type)
7366 {
7367 case R_PPC_REL24:
7368 case R_PPC_LOCAL24PC:
7369 case R_PPC_PLTREL24:
7370 t0 = bfd_get_32 (abfd, hit_addr);
7371 t0 &= ~0x3fffffc;
7372 t0 |= val & 0x3fffffc;
7373 bfd_put_32 (abfd, t0, hit_addr);
7374 break;
7375
7376 case R_PPC_REL14:
7377 case R_PPC_REL14_BRTAKEN:
7378 case R_PPC_REL14_BRNTAKEN:
7379 t0 = bfd_get_32 (abfd, hit_addr);
7380 t0 &= ~0xfffc;
7381 t0 |= val & 0xfffc;
7382 bfd_put_32 (abfd, t0, hit_addr);
7383 break;
7384 }
7385 }
7386
7387 while (branch_fixups != NULL)
7388 {
7389 struct one_branch_fixup *f = branch_fixups;
7390 branch_fixups = branch_fixups->next;
7391 free (f);
7392 }
7393 }
7394
7395 workaround_change = FALSE;
7396 newsize = trampoff;
7397 if (htab->params->ppc476_workaround
7398 && (!bfd_link_relocatable (link_info)
7399 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7400 {
7401 bfd_vma addr, end_addr;
7402 unsigned int crossings;
7403 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7404
7405 addr = isec->output_section->vma + isec->output_offset;
7406 end_addr = addr + trampoff;
7407 addr &= -pagesize;
7408 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7409 if (crossings != 0)
7410 {
7411 /* Keep space aligned, to ensure the patch code itself does
7412 not cross a page. Don't decrease size calculated on a
7413 previous pass as otherwise we might never settle on a layout. */
7414 newsize = 15 - ((end_addr - 1) & 15);
7415 newsize += crossings * 16;
7416 if (relax_info->workaround_size < newsize)
7417 {
7418 relax_info->workaround_size = newsize;
7419 workaround_change = TRUE;
7420 }
7421 /* Ensure relocate_section is called. */
7422 isec->flags |= SEC_RELOC;
7423 }
7424 newsize = trampoff + relax_info->workaround_size;
7425 }
7426
7427 if (htab->params->pic_fixup > 0)
7428 {
7429 picfixup_size -= relax_info->picfixup_size;
7430 if (picfixup_size != 0)
7431 relax_info->picfixup_size += picfixup_size;
7432 newsize += relax_info->picfixup_size;
7433 }
7434
7435 if (changes != 0 || picfixup_size != 0 || workaround_change)
7436 isec->size = newsize;
7437
7438 if (isymbuf != NULL
7439 && symtab_hdr->contents != (unsigned char *) isymbuf)
7440 {
7441 if (! link_info->keep_memory)
7442 free (isymbuf);
7443 else
7444 {
7445 /* Cache the symbols for elf_link_input_bfd. */
7446 symtab_hdr->contents = (unsigned char *) isymbuf;
7447 }
7448 }
7449
7450 if (contents != NULL
7451 && elf_section_data (isec)->this_hdr.contents != contents)
7452 {
7453 if (!changes && !link_info->keep_memory)
7454 free (contents);
7455 else
7456 {
7457 /* Cache the section contents for elf_link_input_bfd. */
7458 elf_section_data (isec)->this_hdr.contents = contents;
7459 }
7460 }
7461
7462 changes += picfixup_size;
7463 if (changes != 0)
7464 {
7465 /* Append sufficient NOP relocs so we can write out relocation
7466 information for the trampolines. */
7467 Elf_Internal_Shdr *rel_hdr;
7468 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7469 * sizeof (*new_relocs));
7470 unsigned ix;
7471
7472 if (!new_relocs)
7473 goto error_return;
7474 memcpy (new_relocs, internal_relocs,
7475 isec->reloc_count * sizeof (*new_relocs));
7476 for (ix = changes; ix--;)
7477 {
7478 irel = new_relocs + ix + isec->reloc_count;
7479
7480 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7481 }
7482 if (internal_relocs != elf_section_data (isec)->relocs)
7483 free (internal_relocs);
7484 elf_section_data (isec)->relocs = new_relocs;
7485 isec->reloc_count += changes;
7486 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7487 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7488 }
7489 else if (internal_relocs != NULL
7490 && elf_section_data (isec)->relocs != internal_relocs)
7491 free (internal_relocs);
7492
7493 *again = changes != 0 || workaround_change;
7494 return TRUE;
7495
7496 error_return:
7497 while (branch_fixups != NULL)
7498 {
7499 struct one_branch_fixup *f = branch_fixups;
7500 branch_fixups = branch_fixups->next;
7501 free (f);
7502 }
7503 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7504 free (isymbuf);
7505 if (contents != NULL
7506 && elf_section_data (isec)->this_hdr.contents != contents)
7507 free (contents);
7508 if (internal_relocs != NULL
7509 && elf_section_data (isec)->relocs != internal_relocs)
7510 free (internal_relocs);
7511 return FALSE;
7512 }
7513 \f
7514 /* What to do when ld finds relocations against symbols defined in
7515 discarded sections. */
7516
7517 static unsigned int
7518 ppc_elf_action_discarded (asection *sec)
7519 {
7520 if (strcmp (".fixup", sec->name) == 0)
7521 return 0;
7522
7523 if (strcmp (".got2", sec->name) == 0)
7524 return 0;
7525
7526 return _bfd_elf_default_action_discarded (sec);
7527 }
7528 \f
7529 /* Fill in the address for a pointer generated in a linker section. */
7530
7531 static bfd_vma
7532 elf_finish_pointer_linker_section (bfd *input_bfd,
7533 elf_linker_section_t *lsect,
7534 struct elf_link_hash_entry *h,
7535 bfd_vma relocation,
7536 const Elf_Internal_Rela *rel)
7537 {
7538 elf_linker_section_pointers_t *linker_section_ptr;
7539
7540 BFD_ASSERT (lsect != NULL);
7541
7542 if (h != NULL)
7543 {
7544 /* Handle global symbol. */
7545 struct ppc_elf_link_hash_entry *eh;
7546
7547 eh = (struct ppc_elf_link_hash_entry *) h;
7548 BFD_ASSERT (eh->elf.def_regular);
7549 linker_section_ptr = eh->linker_section_pointer;
7550 }
7551 else
7552 {
7553 /* Handle local symbol. */
7554 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7555
7556 BFD_ASSERT (is_ppc_elf (input_bfd));
7557 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7558 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7559 }
7560
7561 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7562 rel->r_addend,
7563 lsect);
7564 BFD_ASSERT (linker_section_ptr != NULL);
7565
7566 /* Offset will always be a multiple of four, so use the bottom bit
7567 as a "written" flag. */
7568 if ((linker_section_ptr->offset & 1) == 0)
7569 {
7570 bfd_put_32 (lsect->section->owner,
7571 relocation + linker_section_ptr->addend,
7572 lsect->section->contents + linker_section_ptr->offset);
7573 linker_section_ptr->offset += 1;
7574 }
7575
7576 relocation = (lsect->section->output_section->vma
7577 + lsect->section->output_offset
7578 + linker_section_ptr->offset - 1
7579 - SYM_VAL (lsect->sym));
7580
7581 #ifdef DEBUG
7582 fprintf (stderr,
7583 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7584 lsect->name, (long) relocation, (long) relocation);
7585 #endif
7586
7587 return relocation;
7588 }
7589
7590 #define PPC_LO(v) ((v) & 0xffff)
7591 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7592 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7593
7594 static void
7595 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7596 struct bfd_link_info *info)
7597 {
7598 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7599 bfd *output_bfd = info->output_bfd;
7600 bfd_vma plt;
7601
7602 plt = ((ent->plt.offset & ~1)
7603 + plt_sec->output_section->vma
7604 + plt_sec->output_offset);
7605
7606 if (bfd_link_pic (info))
7607 {
7608 bfd_vma got = 0;
7609
7610 if (ent->addend >= 32768)
7611 got = (ent->addend
7612 + ent->sec->output_section->vma
7613 + ent->sec->output_offset);
7614 else if (htab->elf.hgot != NULL)
7615 got = SYM_VAL (htab->elf.hgot);
7616
7617 plt -= got;
7618
7619 if (plt + 0x8000 < 0x10000)
7620 {
7621 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7622 p += 4;
7623 bfd_put_32 (output_bfd, MTCTR_11, p);
7624 p += 4;
7625 bfd_put_32 (output_bfd, BCTR, p);
7626 p += 4;
7627 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7628 p += 4;
7629 }
7630 else
7631 {
7632 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7633 p += 4;
7634 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7635 p += 4;
7636 bfd_put_32 (output_bfd, MTCTR_11, p);
7637 p += 4;
7638 bfd_put_32 (output_bfd, BCTR, p);
7639 p += 4;
7640 }
7641 }
7642 else
7643 {
7644 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7645 p += 4;
7646 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7647 p += 4;
7648 bfd_put_32 (output_bfd, MTCTR_11, p);
7649 p += 4;
7650 bfd_put_32 (output_bfd, BCTR, p);
7651 p += 4;
7652 }
7653 }
7654
7655 /* Return true if symbol is defined statically. */
7656
7657 static bfd_boolean
7658 is_static_defined (struct elf_link_hash_entry *h)
7659 {
7660 return ((h->root.type == bfd_link_hash_defined
7661 || h->root.type == bfd_link_hash_defweak)
7662 && h->root.u.def.section != NULL
7663 && h->root.u.def.section->output_section != NULL);
7664 }
7665
7666 /* If INSN is an opcode that may be used with an @tls operand, return
7667 the transformed insn for TLS optimisation, otherwise return 0. If
7668 REG is non-zero only match an insn with RB or RA equal to REG. */
7669
7670 unsigned int
7671 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7672 {
7673 unsigned int rtra;
7674
7675 if ((insn & (0x3f << 26)) != 31 << 26)
7676 return 0;
7677
7678 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7679 rtra = insn & ((1 << 26) - (1 << 16));
7680 else if (((insn >> 16) & 0x1f) == reg)
7681 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7682 else
7683 return 0;
7684
7685 if ((insn & (0x3ff << 1)) == 266 << 1)
7686 /* add -> addi. */
7687 insn = 14 << 26;
7688 else if ((insn & (0x1f << 1)) == 23 << 1
7689 && ((insn & (0x1f << 6)) < 14 << 6
7690 || ((insn & (0x1f << 6)) >= 16 << 6
7691 && (insn & (0x1f << 6)) < 24 << 6)))
7692 /* load and store indexed -> dform. */
7693 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7694 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7695 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7696 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7697 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7698 /* lwax -> lwa. */
7699 insn = (58 << 26) | 2;
7700 else
7701 return 0;
7702 insn |= rtra;
7703 return insn;
7704 }
7705
7706 /* If INSN is an opcode that may be used with an @tprel operand, return
7707 the transformed insn for an undefined weak symbol, ie. with the
7708 thread pointer REG operand removed. Otherwise return 0. */
7709
7710 unsigned int
7711 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7712 {
7713 if ((insn & (0x1f << 16)) == reg << 16
7714 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7715 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7716 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7717 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7718 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7719 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7720 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7721 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7722 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7723 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7724 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7725 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7726 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7727 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7728 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7729 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7730 && (insn & 3) != 1)
7731 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7732 && ((insn & 3) == 0 || (insn & 3) == 3))))
7733 {
7734 insn &= ~(0x1f << 16);
7735 }
7736 else if ((insn & (0x1f << 21)) == reg << 21
7737 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7738 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7739 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7740 {
7741 insn &= ~(0x1f << 21);
7742 insn |= (insn & (0x1f << 16)) << 5;
7743 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7744 insn -= 2 >> 26; /* convert to ori,oris */
7745 }
7746 else
7747 insn = 0;
7748 return insn;
7749 }
7750
7751 static bfd_boolean
7752 is_insn_ds_form (unsigned int insn)
7753 {
7754 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7755 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7756 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7757 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7758 }
7759
7760 static bfd_boolean
7761 is_insn_dq_form (unsigned int insn)
7762 {
7763 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7764 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7765 && (insn & 3) == 1));
7766 }
7767
7768 /* The RELOCATE_SECTION function is called by the ELF backend linker
7769 to handle the relocations for a section.
7770
7771 The relocs are always passed as Rela structures; if the section
7772 actually uses Rel structures, the r_addend field will always be
7773 zero.
7774
7775 This function is responsible for adjust the section contents as
7776 necessary, and (if using Rela relocs and generating a
7777 relocatable output file) adjusting the reloc addend as
7778 necessary.
7779
7780 This function does not have to worry about setting the reloc
7781 address or the reloc symbol index.
7782
7783 LOCAL_SYMS is a pointer to the swapped in local symbols.
7784
7785 LOCAL_SECTIONS is an array giving the section in the input file
7786 corresponding to the st_shndx field of each local symbol.
7787
7788 The global hash table entry for the global symbols can be found
7789 via elf_sym_hashes (input_bfd).
7790
7791 When generating relocatable output, this function must handle
7792 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7793 going to be the section symbol corresponding to the output
7794 section, which means that the addend must be adjusted
7795 accordingly. */
7796
7797 static bfd_boolean
7798 ppc_elf_relocate_section (bfd *output_bfd,
7799 struct bfd_link_info *info,
7800 bfd *input_bfd,
7801 asection *input_section,
7802 bfd_byte *contents,
7803 Elf_Internal_Rela *relocs,
7804 Elf_Internal_Sym *local_syms,
7805 asection **local_sections)
7806 {
7807 Elf_Internal_Shdr *symtab_hdr;
7808 struct elf_link_hash_entry **sym_hashes;
7809 struct ppc_elf_link_hash_table *htab;
7810 Elf_Internal_Rela *rel;
7811 Elf_Internal_Rela *wrel;
7812 Elf_Internal_Rela *relend;
7813 Elf_Internal_Rela outrel;
7814 asection *got2;
7815 bfd_vma *local_got_offsets;
7816 bfd_boolean ret = TRUE;
7817 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7818 bfd_boolean is_vxworks_tls;
7819 unsigned int picfixup_size = 0;
7820 struct ppc_elf_relax_info *relax_info = NULL;
7821
7822 #ifdef DEBUG
7823 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7824 "%ld relocations%s",
7825 input_bfd, input_section,
7826 (long) input_section->reloc_count,
7827 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7828 #endif
7829
7830 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7831
7832 /* Initialize howto table if not already done. */
7833 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7834 ppc_elf_howto_init ();
7835
7836 htab = ppc_elf_hash_table (info);
7837 local_got_offsets = elf_local_got_offsets (input_bfd);
7838 symtab_hdr = &elf_symtab_hdr (input_bfd);
7839 sym_hashes = elf_sym_hashes (input_bfd);
7840 /* We have to handle relocations in vxworks .tls_vars sections
7841 specially, because the dynamic loader is 'weird'. */
7842 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7843 && !strcmp (input_section->output_section->name,
7844 ".tls_vars"));
7845 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7846 relax_info = elf_section_data (input_section)->sec_info;
7847 rel = wrel = relocs;
7848 relend = relocs + input_section->reloc_count;
7849 for (; rel < relend; wrel++, rel++)
7850 {
7851 enum elf_ppc_reloc_type r_type;
7852 bfd_vma addend;
7853 bfd_reloc_status_type r;
7854 Elf_Internal_Sym *sym;
7855 asection *sec;
7856 struct elf_link_hash_entry *h;
7857 const char *sym_name;
7858 reloc_howto_type *howto;
7859 unsigned long r_symndx;
7860 bfd_vma relocation;
7861 bfd_vma branch_bit, from;
7862 bfd_boolean unresolved_reloc;
7863 bfd_boolean warned;
7864 unsigned int tls_type, tls_mask, tls_gd;
7865 struct plt_entry **ifunc;
7866 struct reloc_howto_struct alt_howto;
7867
7868 again:
7869 r_type = ELF32_R_TYPE (rel->r_info);
7870 sym = NULL;
7871 sec = NULL;
7872 h = NULL;
7873 unresolved_reloc = FALSE;
7874 warned = FALSE;
7875 r_symndx = ELF32_R_SYM (rel->r_info);
7876
7877 if (r_symndx < symtab_hdr->sh_info)
7878 {
7879 sym = local_syms + r_symndx;
7880 sec = local_sections[r_symndx];
7881 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7882
7883 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7884 }
7885 else
7886 {
7887 bfd_boolean ignored;
7888
7889 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7890 r_symndx, symtab_hdr, sym_hashes,
7891 h, sec, relocation,
7892 unresolved_reloc, warned, ignored);
7893
7894 sym_name = h->root.root.string;
7895 }
7896
7897 if (sec != NULL && discarded_section (sec))
7898 {
7899 /* For relocs against symbols from removed linkonce sections,
7900 or sections discarded by a linker script, we just want the
7901 section contents zeroed. Avoid any special processing. */
7902 howto = NULL;
7903 if (r_type < R_PPC_max)
7904 howto = ppc_elf_howto_table[r_type];
7905
7906 _bfd_clear_contents (howto, input_bfd, input_section,
7907 contents + rel->r_offset);
7908 wrel->r_offset = rel->r_offset;
7909 wrel->r_info = 0;
7910 wrel->r_addend = 0;
7911
7912 /* For ld -r, remove relocations in debug sections against
7913 sections defined in discarded sections. Not done for
7914 non-debug to preserve relocs in .eh_frame which the
7915 eh_frame editing code expects to be present. */
7916 if (bfd_link_relocatable (info)
7917 && (input_section->flags & SEC_DEBUGGING))
7918 wrel--;
7919
7920 continue;
7921 }
7922
7923 if (bfd_link_relocatable (info))
7924 {
7925 if (got2 != NULL
7926 && r_type == R_PPC_PLTREL24
7927 && rel->r_addend != 0)
7928 {
7929 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7930 addend specifies the GOT pointer offset within .got2. */
7931 rel->r_addend += got2->output_offset;
7932 }
7933 if (r_type != R_PPC_RELAX_PLT
7934 && r_type != R_PPC_RELAX_PLTREL24
7935 && r_type != R_PPC_RELAX)
7936 goto copy_reloc;
7937 }
7938
7939 /* TLS optimizations. Replace instruction sequences and relocs
7940 based on information we collected in tls_optimize. We edit
7941 RELOCS so that --emit-relocs will output something sensible
7942 for the final instruction stream. */
7943 tls_mask = 0;
7944 tls_gd = 0;
7945 if (h != NULL)
7946 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7947 else if (local_got_offsets != NULL)
7948 {
7949 struct plt_entry **local_plt;
7950 char *lgot_masks;
7951 local_plt
7952 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7953 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7954 tls_mask = lgot_masks[r_symndx];
7955 }
7956
7957 /* Ensure reloc mapping code below stays sane. */
7958 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7959 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7960 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7961 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7962 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7963 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7964 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7965 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7966 abort ();
7967 switch (r_type)
7968 {
7969 default:
7970 break;
7971
7972 case R_PPC_GOT_TPREL16:
7973 case R_PPC_GOT_TPREL16_LO:
7974 if ((tls_mask & TLS_TLS) != 0
7975 && (tls_mask & TLS_TPREL) == 0)
7976 {
7977 bfd_vma insn;
7978
7979 insn = bfd_get_32 (input_bfd,
7980 contents + rel->r_offset - d_offset);
7981 insn &= 31 << 21;
7982 insn |= 0x3c020000; /* addis 0,2,0 */
7983 bfd_put_32 (input_bfd, insn,
7984 contents + rel->r_offset - d_offset);
7985 r_type = R_PPC_TPREL16_HA;
7986 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7987 }
7988 break;
7989
7990 case R_PPC_TLS:
7991 if ((tls_mask & TLS_TLS) != 0
7992 && (tls_mask & TLS_TPREL) == 0)
7993 {
7994 bfd_vma insn;
7995
7996 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7997 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7998 if (insn == 0)
7999 abort ();
8000 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8001 r_type = R_PPC_TPREL16_LO;
8002 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8003
8004 /* Was PPC_TLS which sits on insn boundary, now
8005 PPC_TPREL16_LO which is at low-order half-word. */
8006 rel->r_offset += d_offset;
8007 }
8008 break;
8009
8010 case R_PPC_GOT_TLSGD16_HI:
8011 case R_PPC_GOT_TLSGD16_HA:
8012 tls_gd = TLS_TPRELGD;
8013 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8014 goto tls_gdld_hi;
8015 break;
8016
8017 case R_PPC_GOT_TLSLD16_HI:
8018 case R_PPC_GOT_TLSLD16_HA:
8019 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8020 {
8021 tls_gdld_hi:
8022 if ((tls_mask & tls_gd) != 0)
8023 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8024 + R_PPC_GOT_TPREL16);
8025 else
8026 {
8027 rel->r_offset -= d_offset;
8028 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8029 r_type = R_PPC_NONE;
8030 }
8031 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8032 }
8033 break;
8034
8035 case R_PPC_GOT_TLSGD16:
8036 case R_PPC_GOT_TLSGD16_LO:
8037 tls_gd = TLS_TPRELGD;
8038 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8039 goto tls_ldgd_opt;
8040 break;
8041
8042 case R_PPC_GOT_TLSLD16:
8043 case R_PPC_GOT_TLSLD16_LO:
8044 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8045 {
8046 unsigned int insn1, insn2;
8047 bfd_vma offset;
8048
8049 tls_ldgd_opt:
8050 offset = (bfd_vma) -1;
8051 /* If not using the newer R_PPC_TLSGD/LD to mark
8052 __tls_get_addr calls, we must trust that the call
8053 stays with its arg setup insns, ie. that the next
8054 reloc is the __tls_get_addr call associated with
8055 the current reloc. Edit both insns. */
8056 if (input_section->has_tls_get_addr_call
8057 && rel + 1 < relend
8058 && branch_reloc_hash_match (input_bfd, rel + 1,
8059 htab->tls_get_addr))
8060 offset = rel[1].r_offset;
8061 /* We read the low GOT_TLS insn because we need to keep
8062 the destination reg. It may be something other than
8063 the usual r3, and moved to r3 before the call by
8064 intervening code. */
8065 insn1 = bfd_get_32 (input_bfd,
8066 contents + rel->r_offset - d_offset);
8067 if ((tls_mask & tls_gd) != 0)
8068 {
8069 /* IE */
8070 insn1 &= (0x1f << 21) | (0x1f << 16);
8071 insn1 |= 32 << 26; /* lwz */
8072 if (offset != (bfd_vma) -1)
8073 {
8074 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8075 insn2 = 0x7c631214; /* add 3,3,2 */
8076 bfd_put_32 (input_bfd, insn2, contents + offset);
8077 }
8078 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8079 + R_PPC_GOT_TPREL16);
8080 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8081 }
8082 else
8083 {
8084 /* LE */
8085 insn1 &= 0x1f << 21;
8086 insn1 |= 0x3c020000; /* addis r,2,0 */
8087 if (tls_gd == 0)
8088 {
8089 /* Was an LD reloc. */
8090 for (r_symndx = 0;
8091 r_symndx < symtab_hdr->sh_info;
8092 r_symndx++)
8093 if (local_sections[r_symndx] == sec)
8094 break;
8095 if (r_symndx >= symtab_hdr->sh_info)
8096 r_symndx = STN_UNDEF;
8097 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8098 if (r_symndx != STN_UNDEF)
8099 rel->r_addend -= (local_syms[r_symndx].st_value
8100 + sec->output_offset
8101 + sec->output_section->vma);
8102 }
8103 r_type = R_PPC_TPREL16_HA;
8104 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8105 if (offset != (bfd_vma) -1)
8106 {
8107 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8108 rel[1].r_offset = offset + d_offset;
8109 rel[1].r_addend = rel->r_addend;
8110 insn2 = 0x38630000; /* addi 3,3,0 */
8111 bfd_put_32 (input_bfd, insn2, contents + offset);
8112 }
8113 }
8114 bfd_put_32 (input_bfd, insn1,
8115 contents + rel->r_offset - d_offset);
8116 if (tls_gd == 0)
8117 {
8118 /* We changed the symbol on an LD reloc. Start over
8119 in order to get h, sym, sec etc. right. */
8120 goto again;
8121 }
8122 }
8123 break;
8124
8125 case R_PPC_TLSGD:
8126 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8127 {
8128 unsigned int insn2;
8129 bfd_vma offset = rel->r_offset;
8130
8131 if ((tls_mask & TLS_TPRELGD) != 0)
8132 {
8133 /* IE */
8134 r_type = R_PPC_NONE;
8135 insn2 = 0x7c631214; /* add 3,3,2 */
8136 }
8137 else
8138 {
8139 /* LE */
8140 r_type = R_PPC_TPREL16_LO;
8141 rel->r_offset += d_offset;
8142 insn2 = 0x38630000; /* addi 3,3,0 */
8143 }
8144 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8145 bfd_put_32 (input_bfd, insn2, contents + offset);
8146 /* Zap the reloc on the _tls_get_addr call too. */
8147 BFD_ASSERT (offset == rel[1].r_offset);
8148 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8149 }
8150 break;
8151
8152 case R_PPC_TLSLD:
8153 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8154 {
8155 unsigned int insn2;
8156
8157 for (r_symndx = 0;
8158 r_symndx < symtab_hdr->sh_info;
8159 r_symndx++)
8160 if (local_sections[r_symndx] == sec)
8161 break;
8162 if (r_symndx >= symtab_hdr->sh_info)
8163 r_symndx = STN_UNDEF;
8164 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8165 if (r_symndx != STN_UNDEF)
8166 rel->r_addend -= (local_syms[r_symndx].st_value
8167 + sec->output_offset
8168 + sec->output_section->vma);
8169
8170 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8171 rel->r_offset += d_offset;
8172 insn2 = 0x38630000; /* addi 3,3,0 */
8173 bfd_put_32 (input_bfd, insn2,
8174 contents + rel->r_offset - d_offset);
8175 /* Zap the reloc on the _tls_get_addr call too. */
8176 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8177 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8178 goto again;
8179 }
8180 break;
8181 }
8182
8183 /* Handle other relocations that tweak non-addend part of insn. */
8184 branch_bit = 0;
8185 switch (r_type)
8186 {
8187 default:
8188 break;
8189
8190 /* Branch taken prediction relocations. */
8191 case R_PPC_ADDR14_BRTAKEN:
8192 case R_PPC_REL14_BRTAKEN:
8193 branch_bit = BRANCH_PREDICT_BIT;
8194 /* Fall through. */
8195
8196 /* Branch not taken prediction relocations. */
8197 case R_PPC_ADDR14_BRNTAKEN:
8198 case R_PPC_REL14_BRNTAKEN:
8199 {
8200 bfd_vma insn;
8201
8202 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8203 insn &= ~BRANCH_PREDICT_BIT;
8204 insn |= branch_bit;
8205
8206 from = (rel->r_offset
8207 + input_section->output_offset
8208 + input_section->output_section->vma);
8209
8210 /* Invert 'y' bit if not the default. */
8211 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8212 insn ^= BRANCH_PREDICT_BIT;
8213
8214 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8215 break;
8216 }
8217 }
8218
8219 if (ELIMINATE_COPY_RELOCS
8220 && h != NULL
8221 && !h->def_regular
8222 && h->protected_def
8223 && ppc_elf_hash_entry (h)->has_addr16_ha
8224 && ppc_elf_hash_entry (h)->has_addr16_lo
8225 && htab->params->pic_fixup > 0)
8226 {
8227 /* Convert lis;addi or lis;load/store accessing a protected
8228 variable defined in a shared library to PIC. */
8229 unsigned int insn;
8230
8231 if (r_type == R_PPC_ADDR16_HA)
8232 {
8233 insn = bfd_get_32 (input_bfd,
8234 contents + rel->r_offset - d_offset);
8235 if ((insn & (0x3f << 26)) == (15u << 26)
8236 && (insn & (0x1f << 16)) == 0 /* lis */)
8237 {
8238 bfd_byte *p;
8239 bfd_vma off;
8240 bfd_vma got_addr;
8241
8242 p = (contents + input_section->size
8243 - relax_info->workaround_size
8244 - relax_info->picfixup_size
8245 + picfixup_size);
8246 off = (p - contents) - (rel->r_offset - d_offset);
8247 if (off > 0x1fffffc || (off & 3) != 0)
8248 info->callbacks->einfo
8249 (_("%H: fixup branch overflow\n"),
8250 input_bfd, input_section, rel->r_offset);
8251
8252 bfd_put_32 (input_bfd, B | off,
8253 contents + rel->r_offset - d_offset);
8254 got_addr = (htab->elf.sgot->output_section->vma
8255 + htab->elf.sgot->output_offset
8256 + (h->got.offset & ~1));
8257 wrel->r_offset = (p - contents) + d_offset;
8258 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8259 wrel->r_addend = got_addr;
8260 insn &= ~0xffff;
8261 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8262 bfd_put_32 (input_bfd, insn, p);
8263
8264 /* Convert lis to lwz, loading address from GOT. */
8265 insn &= ~0xffff;
8266 insn ^= (32u ^ 15u) << 26;
8267 insn |= (insn & (0x1f << 21)) >> 5;
8268 insn |= got_addr & 0xffff;
8269 bfd_put_32 (input_bfd, insn, p + 4);
8270
8271 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8272 picfixup_size += 12;
8273
8274 /* Use one of the spare relocs, so --emit-relocs
8275 output is reasonable. */
8276 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8277 wrel++, rel++;
8278 rel->r_offset = wrel[-1].r_offset + 4;
8279 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8280 rel->r_addend = wrel[-1].r_addend;
8281
8282 /* Continue on as if we had a got reloc, to output
8283 dynamic reloc. */
8284 r_type = R_PPC_GOT16_LO;
8285 }
8286 else
8287 _bfd_error_handler
8288 /* xgettext:c-format */
8289 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8290 input_bfd, input_section, rel->r_offset,
8291 "R_PPC_ADDR16_HA", insn);
8292 }
8293 else if (r_type == R_PPC_ADDR16_LO)
8294 {
8295 insn = bfd_get_32 (input_bfd,
8296 contents + rel->r_offset - d_offset);
8297 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8298 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8299 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8300 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8301 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8302 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8303 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8304 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8305 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8306 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8307 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8308 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8309 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8310 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8311 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8312 && (insn & 3) != 1)
8313 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8314 && ((insn & 3) == 0 || (insn & 3) == 3)))
8315 {
8316 /* Arrange to apply the reloc addend, if any. */
8317 relocation = 0;
8318 unresolved_reloc = FALSE;
8319 rel->r_info = ELF32_R_INFO (0, r_type);
8320 }
8321 else
8322 _bfd_error_handler
8323 /* xgettext:c-format */
8324 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8325 input_bfd, input_section, rel->r_offset,
8326 "R_PPC_ADDR16_LO", insn);
8327 }
8328 }
8329
8330 ifunc = NULL;
8331 if (!htab->is_vxworks)
8332 {
8333 struct plt_entry *ent;
8334
8335 if (h != NULL)
8336 {
8337 if (h->type == STT_GNU_IFUNC)
8338 ifunc = &h->plt.plist;
8339 }
8340 else if (local_got_offsets != NULL
8341 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8342 {
8343 struct plt_entry **local_plt;
8344
8345 local_plt = (struct plt_entry **) (local_got_offsets
8346 + symtab_hdr->sh_info);
8347 ifunc = local_plt + r_symndx;
8348 }
8349
8350 ent = NULL;
8351 if (ifunc != NULL
8352 && (!bfd_link_pic (info)
8353 || is_branch_reloc (r_type)))
8354 {
8355 addend = 0;
8356 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8357 addend = rel->r_addend;
8358 ent = find_plt_ent (ifunc, got2, addend);
8359 }
8360 if (ent != NULL)
8361 {
8362 if (bfd_link_pic (info)
8363 && ent->sec != got2
8364 && htab->plt_type != PLT_NEW
8365 && (!htab->elf.dynamic_sections_created
8366 || h == NULL
8367 || h->dynindx == -1))
8368 {
8369 /* Uh oh, we are going to create a pic glink stub
8370 for an ifunc (here for h == NULL and later in
8371 finish_dynamic_symbol for h != NULL), and
8372 apparently are using code compiled with
8373 -mbss-plt. The difficulty is that -mbss-plt code
8374 gives no indication via a magic PLTREL24 addend
8375 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8376 is pointing into a .got2 section (and how far
8377 into .got2). */
8378 info->callbacks->einfo
8379 /* xgettext:c-format */
8380 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8381 input_bfd, input_section, rel->r_offset, sym_name);
8382 }
8383 if (h == NULL && (ent->plt.offset & 1) == 0)
8384 {
8385 Elf_Internal_Rela rela;
8386 bfd_byte *loc;
8387
8388 rela.r_offset = (htab->elf.iplt->output_section->vma
8389 + htab->elf.iplt->output_offset
8390 + ent->plt.offset);
8391 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8392 rela.r_addend = relocation;
8393 loc = htab->elf.irelplt->contents;
8394 loc += (htab->elf.irelplt->reloc_count++
8395 * sizeof (Elf32_External_Rela));
8396 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8397 htab->local_ifunc_resolver = 1;
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 if (!htab->elf.dynamic_sections_created
8506 || h->dynindx == -1
8507 || SYMBOL_REFERENCES_LOCAL (info, h)
8508 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8509 /* This is actually a static link, or it is a
8510 -Bsymbolic link and the symbol is defined
8511 locally, or the symbol was forced to be local
8512 because of a version file. */
8513 ;
8514 else
8515 {
8516 indx = h->dynindx;
8517 unresolved_reloc = FALSE;
8518 }
8519 offp = &h->got.offset;
8520 }
8521 else
8522 {
8523 if (local_got_offsets == NULL)
8524 abort ();
8525 offp = &local_got_offsets[r_symndx];
8526 }
8527
8528 /* The offset must always be a multiple of 4. We use the
8529 least significant bit to record whether we have already
8530 processed this entry. */
8531 off = *offp;
8532 if ((off & 1) != 0)
8533 off &= ~1;
8534 else
8535 {
8536 unsigned int tls_m = (tls_mask
8537 & (TLS_LD | TLS_GD | TLS_DTPREL
8538 | TLS_TPREL | TLS_TPRELGD));
8539
8540 if (offp == &htab->tlsld_got.offset)
8541 tls_m = TLS_LD;
8542 else if (h == NULL
8543 || !h->def_dynamic)
8544 tls_m &= ~TLS_LD;
8545
8546 /* We might have multiple got entries for this sym.
8547 Initialize them all. */
8548 do
8549 {
8550 int tls_ty = 0;
8551
8552 if ((tls_m & TLS_LD) != 0)
8553 {
8554 tls_ty = TLS_TLS | TLS_LD;
8555 tls_m &= ~TLS_LD;
8556 }
8557 else if ((tls_m & TLS_GD) != 0)
8558 {
8559 tls_ty = TLS_TLS | TLS_GD;
8560 tls_m &= ~TLS_GD;
8561 }
8562 else if ((tls_m & TLS_DTPREL) != 0)
8563 {
8564 tls_ty = TLS_TLS | TLS_DTPREL;
8565 tls_m &= ~TLS_DTPREL;
8566 }
8567 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8568 {
8569 tls_ty = TLS_TLS | TLS_TPREL;
8570 tls_m = 0;
8571 }
8572
8573 /* Generate relocs for the dynamic linker. */
8574 if (indx != 0
8575 || (bfd_link_pic (info)
8576 && (h == NULL
8577 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8578 || offp == &htab->tlsld_got.offset)))
8579 {
8580 asection *rsec = htab->elf.srelgot;
8581 bfd_byte * loc;
8582
8583 if (ifunc != NULL)
8584 {
8585 rsec = htab->elf.irelplt;
8586 if (indx == 0)
8587 htab->local_ifunc_resolver = 1;
8588 else if (is_static_defined (h))
8589 htab->maybe_local_ifunc_resolver = 1;
8590 }
8591 outrel.r_offset = (htab->elf.sgot->output_section->vma
8592 + htab->elf.sgot->output_offset
8593 + off);
8594 outrel.r_addend = 0;
8595 if (tls_ty & (TLS_LD | TLS_GD))
8596 {
8597 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8598 if (tls_ty == (TLS_TLS | TLS_GD))
8599 {
8600 loc = rsec->contents;
8601 loc += (rsec->reloc_count++
8602 * sizeof (Elf32_External_Rela));
8603 bfd_elf32_swap_reloca_out (output_bfd,
8604 &outrel, loc);
8605 outrel.r_offset += 4;
8606 outrel.r_info
8607 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8608 }
8609 }
8610 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8611 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8612 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8613 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8614 else if (indx != 0)
8615 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8616 else if (ifunc != NULL)
8617 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8618 else
8619 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8620 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8621 {
8622 outrel.r_addend += relocation;
8623 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8624 {
8625 if (htab->elf.tls_sec == NULL)
8626 outrel.r_addend = 0;
8627 else
8628 outrel.r_addend -= htab->elf.tls_sec->vma;
8629 }
8630 }
8631 loc = rsec->contents;
8632 loc += (rsec->reloc_count++
8633 * sizeof (Elf32_External_Rela));
8634 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8635 }
8636
8637 /* Init the .got section contents if we're not
8638 emitting a reloc. */
8639 else
8640 {
8641 bfd_vma value = relocation;
8642
8643 if (tls_ty != 0)
8644 {
8645 if (htab->elf.tls_sec == NULL)
8646 value = 0;
8647 else
8648 {
8649 if (tls_ty & TLS_LD)
8650 value = 0;
8651 else
8652 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8653 if (tls_ty & TLS_TPREL)
8654 value += DTP_OFFSET - TP_OFFSET;
8655 }
8656
8657 if (tls_ty & (TLS_LD | TLS_GD))
8658 {
8659 bfd_put_32 (input_bfd, value,
8660 htab->elf.sgot->contents + off + 4);
8661 value = 1;
8662 }
8663 }
8664 bfd_put_32 (input_bfd, value,
8665 htab->elf.sgot->contents + off);
8666 }
8667
8668 off += 4;
8669 if (tls_ty & (TLS_LD | TLS_GD))
8670 off += 4;
8671 }
8672 while (tls_m != 0);
8673
8674 off = *offp;
8675 *offp = off | 1;
8676 }
8677
8678 if (off >= (bfd_vma) -2)
8679 abort ();
8680
8681 if ((tls_type & TLS_TLS) != 0)
8682 {
8683 if (tls_type != (TLS_TLS | TLS_LD))
8684 {
8685 if ((tls_mask & TLS_LD) != 0
8686 && !(h == NULL
8687 || !h->def_dynamic))
8688 off += 8;
8689 if (tls_type != (TLS_TLS | TLS_GD))
8690 {
8691 if ((tls_mask & TLS_GD) != 0)
8692 off += 8;
8693 if (tls_type != (TLS_TLS | TLS_DTPREL))
8694 {
8695 if ((tls_mask & TLS_DTPREL) != 0)
8696 off += 4;
8697 }
8698 }
8699 }
8700 }
8701
8702 /* If here for a picfixup, we're done. */
8703 if (r_type != ELF32_R_TYPE (rel->r_info))
8704 goto copy_reloc;
8705
8706 relocation = (htab->elf.sgot->output_section->vma
8707 + htab->elf.sgot->output_offset
8708 + off
8709 - SYM_VAL (htab->elf.hgot));
8710
8711 /* Addends on got relocations don't make much sense.
8712 x+off@got is actually x@got+off, and since the got is
8713 generated by a hash table traversal, the value in the
8714 got at entry m+n bears little relation to the entry m. */
8715 if (addend != 0)
8716 info->callbacks->einfo
8717 /* xgettext:c-format */
8718 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8719 input_bfd, input_section, rel->r_offset,
8720 howto->name,
8721 sym_name);
8722 }
8723 break;
8724
8725 /* Relocations that need no special processing. */
8726 case R_PPC_LOCAL24PC:
8727 /* It makes no sense to point a local relocation
8728 at a symbol not in this object. */
8729 if (unresolved_reloc)
8730 {
8731 (*info->callbacks->undefined_symbol) (info,
8732 h->root.root.string,
8733 input_bfd,
8734 input_section,
8735 rel->r_offset,
8736 TRUE);
8737 goto copy_reloc;
8738 }
8739 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8740 {
8741 /* @local on an ifunc does not really make sense since
8742 the ifunc resolver can take you anywhere. More
8743 seriously, calls to ifuncs must go through a plt call
8744 stub, and for pic the plt call stubs uses r30 to
8745 access the PLT. The problem is that a call that is
8746 local won't have the +32k reloc addend trick marking
8747 -fPIC code, so the linker won't know whether r30 is
8748 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8749 /* xgettext:c-format */
8750 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8751 input_bfd, input_section, rel->r_offset,
8752 h->root.root.string);
8753 }
8754 break;
8755
8756 case R_PPC_DTPREL16:
8757 case R_PPC_DTPREL16_LO:
8758 case R_PPC_DTPREL16_HI:
8759 case R_PPC_DTPREL16_HA:
8760 if (htab->elf.tls_sec != NULL)
8761 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8762 break;
8763
8764 /* Relocations that may need to be propagated if this is a shared
8765 object. */
8766 case R_PPC_TPREL16:
8767 case R_PPC_TPREL16_LO:
8768 case R_PPC_TPREL16_HI:
8769 case R_PPC_TPREL16_HA:
8770 if (h != NULL
8771 && h->root.type == bfd_link_hash_undefweak
8772 && h->dynindx == -1)
8773 {
8774 /* Make this relocation against an undefined weak symbol
8775 resolve to zero. This is really just a tweak, since
8776 code using weak externs ought to check that they are
8777 defined before using them. */
8778 bfd_byte *p = contents + rel->r_offset - d_offset;
8779 unsigned int insn = bfd_get_32 (input_bfd, p);
8780 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8781 if (insn != 0)
8782 bfd_put_32 (input_bfd, insn, p);
8783 break;
8784 }
8785 if (htab->elf.tls_sec != NULL)
8786 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8787 /* The TPREL16 relocs shouldn't really be used in shared
8788 libs as they will result in DT_TEXTREL being set, but
8789 support them anyway. */
8790 goto dodyn;
8791
8792 case R_PPC_TPREL32:
8793 if (htab->elf.tls_sec != NULL)
8794 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8795 goto dodyn;
8796
8797 case R_PPC_DTPREL32:
8798 if (htab->elf.tls_sec != NULL)
8799 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8800 goto dodyn;
8801
8802 case R_PPC_DTPMOD32:
8803 relocation = 1;
8804 addend = 0;
8805 goto dodyn;
8806
8807 case R_PPC_REL16:
8808 case R_PPC_REL16_LO:
8809 case R_PPC_REL16_HI:
8810 case R_PPC_REL16_HA:
8811 case R_PPC_REL16DX_HA:
8812 break;
8813
8814 case R_PPC_REL32:
8815 if (h == NULL || h == htab->elf.hgot)
8816 break;
8817 /* fall through */
8818
8819 case R_PPC_ADDR32:
8820 case R_PPC_ADDR16:
8821 case R_PPC_ADDR16_LO:
8822 case R_PPC_ADDR16_HI:
8823 case R_PPC_ADDR16_HA:
8824 case R_PPC_UADDR32:
8825 case R_PPC_UADDR16:
8826 goto dodyn;
8827
8828 case R_PPC_VLE_REL8:
8829 case R_PPC_VLE_REL15:
8830 case R_PPC_VLE_REL24:
8831 case R_PPC_REL24:
8832 case R_PPC_REL14:
8833 case R_PPC_REL14_BRTAKEN:
8834 case R_PPC_REL14_BRNTAKEN:
8835 /* If these relocations are not to a named symbol, they can be
8836 handled right here, no need to bother the dynamic linker. */
8837 if (SYMBOL_CALLS_LOCAL (info, h)
8838 || h == htab->elf.hgot)
8839 break;
8840 /* fall through */
8841
8842 case R_PPC_ADDR24:
8843 case R_PPC_ADDR14:
8844 case R_PPC_ADDR14_BRTAKEN:
8845 case R_PPC_ADDR14_BRNTAKEN:
8846 if (h != NULL && !bfd_link_pic (info))
8847 break;
8848 /* fall through */
8849
8850 dodyn:
8851 if ((input_section->flags & SEC_ALLOC) == 0
8852 || is_vxworks_tls)
8853 break;
8854
8855 if ((bfd_link_pic (info)
8856 && !(h != NULL
8857 && ((h->root.type == bfd_link_hash_undefined
8858 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8859 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
8860 && (must_be_dyn_reloc (info, r_type)
8861 || !SYMBOL_CALLS_LOCAL (info, h)))
8862 || (ELIMINATE_COPY_RELOCS
8863 && !bfd_link_pic (info)
8864 && h != NULL
8865 && h->dynindx != -1
8866 && !h->non_got_ref
8867 && !h->def_regular
8868 && !(h->protected_def
8869 && ppc_elf_hash_entry (h)->has_addr16_ha
8870 && ppc_elf_hash_entry (h)->has_addr16_lo
8871 && htab->params->pic_fixup > 0)))
8872 {
8873 int skip;
8874 bfd_byte *loc;
8875 asection *sreloc;
8876 long indx = 0;
8877
8878 #ifdef DEBUG
8879 fprintf (stderr, "ppc_elf_relocate_section needs to "
8880 "create relocation for %s\n",
8881 (h && h->root.root.string
8882 ? h->root.root.string : "<unknown>"));
8883 #endif
8884
8885 /* When generating a shared object, these relocations
8886 are copied into the output file to be resolved at run
8887 time. */
8888 skip = 0;
8889 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8890 input_section,
8891 rel->r_offset);
8892 if (outrel.r_offset == (bfd_vma) -1
8893 || outrel.r_offset == (bfd_vma) -2)
8894 skip = (int) outrel.r_offset;
8895 outrel.r_offset += (input_section->output_section->vma
8896 + input_section->output_offset);
8897
8898 if (skip)
8899 memset (&outrel, 0, sizeof outrel);
8900 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8901 {
8902 indx = h->dynindx;
8903 BFD_ASSERT (indx != -1);
8904 unresolved_reloc = FALSE;
8905 outrel.r_info = ELF32_R_INFO (indx, r_type);
8906 outrel.r_addend = rel->r_addend;
8907 }
8908 else
8909 {
8910 outrel.r_addend = relocation + rel->r_addend;
8911
8912 if (r_type != R_PPC_ADDR32)
8913 {
8914 if (ifunc != NULL)
8915 {
8916 /* If we get here when building a static
8917 executable, then the libc startup function
8918 responsible for applying indirect function
8919 relocations is going to complain about
8920 the reloc type.
8921 If we get here when building a dynamic
8922 executable, it will be because we have
8923 a text relocation. The dynamic loader
8924 will set the text segment writable and
8925 non-executable to apply text relocations.
8926 So we'll segfault when trying to run the
8927 indirection function to resolve the reloc. */
8928 info->callbacks->einfo
8929 /* xgettext:c-format */
8930 (_("%H: relocation %s for indirect "
8931 "function %s unsupported\n"),
8932 input_bfd, input_section, rel->r_offset,
8933 howto->name,
8934 sym_name);
8935 ret = FALSE;
8936 }
8937 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8938 ;
8939 else if (sec == NULL || sec->owner == NULL)
8940 {
8941 bfd_set_error (bfd_error_bad_value);
8942 ret = FALSE;
8943 }
8944 else
8945 {
8946 asection *osec;
8947
8948 /* We are turning this relocation into one
8949 against a section symbol. It would be
8950 proper to subtract the symbol's value,
8951 osec->vma, from the emitted reloc addend,
8952 but ld.so expects buggy relocs.
8953 FIXME: Why not always use a zero index? */
8954 osec = sec->output_section;
8955 indx = elf_section_data (osec)->dynindx;
8956 if (indx == 0)
8957 {
8958 osec = htab->elf.text_index_section;
8959 indx = elf_section_data (osec)->dynindx;
8960 }
8961 BFD_ASSERT (indx != 0);
8962 #ifdef DEBUG
8963 if (indx == 0)
8964 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8965 indx, osec->name, osec->flags,
8966 h->root.root.string);
8967 #endif
8968 }
8969
8970 outrel.r_info = ELF32_R_INFO (indx, r_type);
8971 }
8972 else if (ifunc != NULL)
8973 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8974 else
8975 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8976 }
8977
8978 sreloc = elf_section_data (input_section)->sreloc;
8979 if (ifunc)
8980 {
8981 sreloc = htab->elf.irelplt;
8982 if (indx == 0)
8983 htab->local_ifunc_resolver = 1;
8984 else if (is_static_defined (h))
8985 htab->maybe_local_ifunc_resolver = 1;
8986 }
8987 if (sreloc == NULL)
8988 return FALSE;
8989
8990 loc = sreloc->contents;
8991 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8992 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8993
8994 if (skip == -1)
8995 goto copy_reloc;
8996
8997 /* This reloc will be computed at runtime. Clear the memory
8998 so that it contains a predictable value for prelink. */
8999 if (!skip)
9000 {
9001 relocation = howto->pc_relative ? outrel.r_offset : 0;
9002 addend = 0;
9003 break;
9004 }
9005 }
9006 break;
9007
9008 case R_PPC_RELAX_PLT:
9009 case R_PPC_RELAX_PLTREL24:
9010 if (h != NULL)
9011 {
9012 struct plt_entry *ent;
9013 bfd_vma got2_addend = 0;
9014
9015 if (r_type == R_PPC_RELAX_PLTREL24)
9016 {
9017 if (bfd_link_pic (info))
9018 got2_addend = addend;
9019 addend = 0;
9020 }
9021 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9022 if (htab->plt_type == PLT_NEW)
9023 relocation = (htab->glink->output_section->vma
9024 + htab->glink->output_offset
9025 + ent->glink_offset);
9026 else
9027 relocation = (htab->elf.splt->output_section->vma
9028 + htab->elf.splt->output_offset
9029 + ent->plt.offset);
9030 }
9031 /* Fall through. */
9032
9033 case R_PPC_RELAX:
9034 {
9035 const int *stub;
9036 size_t size;
9037 size_t insn_offset = rel->r_offset;
9038 unsigned int insn;
9039
9040 if (bfd_link_pic (info))
9041 {
9042 relocation -= (input_section->output_section->vma
9043 + input_section->output_offset
9044 + rel->r_offset - 4);
9045 stub = shared_stub_entry;
9046 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9047 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9048 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9049 stub += 3;
9050 size = ARRAY_SIZE (shared_stub_entry) - 3;
9051 }
9052 else
9053 {
9054 stub = stub_entry;
9055 size = ARRAY_SIZE (stub_entry);
9056 }
9057
9058 relocation += addend;
9059 if (bfd_link_relocatable (info))
9060 relocation = 0;
9061
9062 /* First insn is HA, second is LO. */
9063 insn = *stub++;
9064 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9065 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9066 insn_offset += 4;
9067
9068 insn = *stub++;
9069 insn |= relocation & 0xffff;
9070 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9071 insn_offset += 4;
9072 size -= 2;
9073
9074 while (size != 0)
9075 {
9076 insn = *stub++;
9077 --size;
9078 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9079 insn_offset += 4;
9080 }
9081
9082 /* Rewrite the reloc and convert one of the trailing nop
9083 relocs to describe this relocation. */
9084 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9085 /* The relocs are at the bottom 2 bytes */
9086 wrel->r_offset = rel->r_offset + d_offset;
9087 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9088 wrel->r_addend = rel->r_addend;
9089 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9090 wrel++, rel++;
9091 wrel->r_offset += 4;
9092 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9093 }
9094 continue;
9095
9096 /* Indirect .sdata relocation. */
9097 case R_PPC_EMB_SDAI16:
9098 BFD_ASSERT (htab->sdata[0].section != NULL);
9099 if (!is_static_defined (htab->sdata[0].sym))
9100 {
9101 unresolved_reloc = TRUE;
9102 break;
9103 }
9104 relocation
9105 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9106 h, relocation, rel);
9107 addend = 0;
9108 break;
9109
9110 /* Indirect .sdata2 relocation. */
9111 case R_PPC_EMB_SDA2I16:
9112 BFD_ASSERT (htab->sdata[1].section != NULL);
9113 if (!is_static_defined (htab->sdata[1].sym))
9114 {
9115 unresolved_reloc = TRUE;
9116 break;
9117 }
9118 relocation
9119 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9120 h, relocation, rel);
9121 addend = 0;
9122 break;
9123
9124 /* Handle the TOC16 reloc. We want to use the offset within the .got
9125 section, not the actual VMA. This is appropriate when generating
9126 an embedded ELF object, for which the .got section acts like the
9127 AIX .toc section. */
9128 case R_PPC_TOC16: /* phony GOT16 relocations */
9129 if (sec == NULL || sec->output_section == NULL)
9130 {
9131 unresolved_reloc = TRUE;
9132 break;
9133 }
9134 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9135 ".got") == 0
9136 || strcmp (bfd_get_section_name (sec->owner, sec),
9137 ".cgot") == 0);
9138
9139 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9140 break;
9141
9142 case R_PPC_PLTREL24:
9143 if (h != NULL && ifunc == NULL)
9144 {
9145 struct plt_entry *ent;
9146
9147 ent = find_plt_ent (&h->plt.plist, got2,
9148 bfd_link_pic (info) ? addend : 0);
9149 if (ent == NULL
9150 || htab->elf.splt == NULL)
9151 {
9152 /* We didn't make a PLT entry for this symbol. This
9153 happens when statically linking PIC code, or when
9154 using -Bsymbolic. */
9155 }
9156 else
9157 {
9158 /* Relocation is to the entry for this symbol in the
9159 procedure linkage table. */
9160 unresolved_reloc = FALSE;
9161 if (htab->plt_type == PLT_NEW)
9162 relocation = (htab->glink->output_section->vma
9163 + htab->glink->output_offset
9164 + ent->glink_offset);
9165 else
9166 relocation = (htab->elf.splt->output_section->vma
9167 + htab->elf.splt->output_offset
9168 + ent->plt.offset);
9169 }
9170 }
9171
9172 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9173 addend specifies the GOT pointer offset within .got2.
9174 Don't apply it to the relocation field. */
9175 addend = 0;
9176 break;
9177
9178 /* Relocate against _SDA_BASE_. */
9179 case R_PPC_SDAREL16:
9180 {
9181 const char *name;
9182 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9183
9184 if (sec == NULL
9185 || sec->output_section == NULL
9186 || !is_static_defined (sda))
9187 {
9188 unresolved_reloc = TRUE;
9189 break;
9190 }
9191 addend -= SYM_VAL (sda);
9192
9193 name = bfd_get_section_name (output_bfd, sec->output_section);
9194 if (!(strcmp (name, ".sdata") == 0
9195 || strcmp (name, ".sbss") == 0))
9196 {
9197 info->callbacks->einfo
9198 /* xgettext:c-format */
9199 (_("%P: %B: the target (%s) of a %s relocation is "
9200 "in the wrong output section (%s)\n"),
9201 input_bfd,
9202 sym_name,
9203 howto->name,
9204 name);
9205 }
9206 }
9207 break;
9208
9209 /* Relocate against _SDA2_BASE_. */
9210 case R_PPC_EMB_SDA2REL:
9211 {
9212 const char *name;
9213 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9214
9215 if (sec == NULL
9216 || sec->output_section == NULL
9217 || !is_static_defined (sda))
9218 {
9219 unresolved_reloc = TRUE;
9220 break;
9221 }
9222 addend -= SYM_VAL (sda);
9223
9224 name = bfd_get_section_name (output_bfd, sec->output_section);
9225 if (!(strcmp (name, ".sdata2") == 0
9226 || strcmp (name, ".sbss2") == 0))
9227 {
9228 info->callbacks->einfo
9229 /* xgettext:c-format */
9230 (_("%P: %B: the target (%s) of a %s relocation is "
9231 "in the wrong output section (%s)\n"),
9232 input_bfd,
9233 sym_name,
9234 howto->name,
9235 name);
9236 }
9237 }
9238 break;
9239
9240 case R_PPC_VLE_LO16A:
9241 relocation = relocation + addend;
9242 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9243 contents + rel->r_offset, relocation,
9244 split16a_type, htab->params->vle_reloc_fixup);
9245 goto copy_reloc;
9246
9247 case R_PPC_VLE_LO16D:
9248 relocation = relocation + addend;
9249 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9250 contents + rel->r_offset, relocation,
9251 split16d_type, htab->params->vle_reloc_fixup);
9252 goto copy_reloc;
9253
9254 case R_PPC_VLE_HI16A:
9255 relocation = (relocation + addend) >> 16;
9256 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9257 contents + rel->r_offset, relocation,
9258 split16a_type, htab->params->vle_reloc_fixup);
9259 goto copy_reloc;
9260
9261 case R_PPC_VLE_HI16D:
9262 relocation = (relocation + addend) >> 16;
9263 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9264 contents + rel->r_offset, relocation,
9265 split16d_type, htab->params->vle_reloc_fixup);
9266 goto copy_reloc;
9267
9268 case R_PPC_VLE_HA16A:
9269 relocation = (relocation + addend + 0x8000) >> 16;
9270 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9271 contents + rel->r_offset, relocation,
9272 split16a_type, htab->params->vle_reloc_fixup);
9273 goto copy_reloc;
9274
9275 case R_PPC_VLE_HA16D:
9276 relocation = (relocation + addend + 0x8000) >> 16;
9277 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9278 contents + rel->r_offset, relocation,
9279 split16d_type, htab->params->vle_reloc_fixup);
9280 goto copy_reloc;
9281
9282 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9283 case R_PPC_EMB_SDA21:
9284 case R_PPC_VLE_SDA21:
9285 case R_PPC_EMB_RELSDA:
9286 case R_PPC_VLE_SDA21_LO:
9287 {
9288 const char *name;
9289 int reg;
9290 unsigned int insn;
9291 struct elf_link_hash_entry *sda = NULL;
9292
9293 if (sec == NULL || sec->output_section == NULL)
9294 {
9295 unresolved_reloc = TRUE;
9296 break;
9297 }
9298
9299 name = bfd_get_section_name (output_bfd, sec->output_section);
9300 if (strcmp (name, ".sdata") == 0
9301 || strcmp (name, ".sbss") == 0)
9302 {
9303 reg = 13;
9304 sda = htab->sdata[0].sym;
9305 }
9306 else if (strcmp (name, ".sdata2") == 0
9307 || strcmp (name, ".sbss2") == 0)
9308 {
9309 reg = 2;
9310 sda = htab->sdata[1].sym;
9311 }
9312 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9313 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9314 {
9315 reg = 0;
9316 }
9317 else
9318 {
9319 info->callbacks->einfo
9320 /* xgettext:c-format */
9321 (_("%P: %B: the target (%s) of a %s relocation is "
9322 "in the wrong output section (%s)\n"),
9323 input_bfd,
9324 sym_name,
9325 howto->name,
9326 name);
9327
9328 bfd_set_error (bfd_error_bad_value);
9329 ret = FALSE;
9330 goto copy_reloc;
9331 }
9332
9333 if (sda != NULL)
9334 {
9335 if (!is_static_defined (sda))
9336 {
9337 unresolved_reloc = TRUE;
9338 break;
9339 }
9340 addend -= SYM_VAL (sda);
9341 }
9342
9343 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9344 if (reg == 0
9345 && (r_type == R_PPC_VLE_SDA21
9346 || r_type == R_PPC_VLE_SDA21_LO))
9347 {
9348 relocation = relocation + addend;
9349 addend = 0;
9350
9351 /* Force e_li insn, keeping RT from original insn. */
9352 insn &= 0x1f << 21;
9353 insn |= 28u << 26;
9354
9355 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9356 /* Top 4 bits of value to 17..20. */
9357 insn |= (relocation & 0xf0000) >> 5;
9358 /* Next 5 bits of the value to 11..15. */
9359 insn |= (relocation & 0xf800) << 5;
9360 /* And the final 11 bits of the value to bits 21 to 31. */
9361 insn |= relocation & 0x7ff;
9362
9363 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9364
9365 if (r_type == R_PPC_VLE_SDA21
9366 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9367 goto overflow;
9368 goto copy_reloc;
9369 }
9370 else if (r_type == R_PPC_EMB_SDA21
9371 || r_type == R_PPC_VLE_SDA21
9372 || r_type == R_PPC_VLE_SDA21_LO)
9373 {
9374 /* Fill in register field. */
9375 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9376 }
9377 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9378 }
9379 break;
9380
9381 case R_PPC_VLE_SDAREL_LO16A:
9382 case R_PPC_VLE_SDAREL_LO16D:
9383 case R_PPC_VLE_SDAREL_HI16A:
9384 case R_PPC_VLE_SDAREL_HI16D:
9385 case R_PPC_VLE_SDAREL_HA16A:
9386 case R_PPC_VLE_SDAREL_HA16D:
9387 {
9388 bfd_vma value;
9389 const char *name;
9390 struct elf_link_hash_entry *sda = NULL;
9391
9392 if (sec == NULL || sec->output_section == NULL)
9393 {
9394 unresolved_reloc = TRUE;
9395 break;
9396 }
9397
9398 name = bfd_get_section_name (output_bfd, sec->output_section);
9399 if (strcmp (name, ".sdata") == 0
9400 || strcmp (name, ".sbss") == 0)
9401 sda = htab->sdata[0].sym;
9402 else if (strcmp (name, ".sdata2") == 0
9403 || strcmp (name, ".sbss2") == 0)
9404 sda = htab->sdata[1].sym;
9405 else
9406 {
9407 _bfd_error_handler
9408 /* xgettext:c-format */
9409 (_("%B: the target (%s) of a %s relocation is "
9410 "in the wrong output section (%s)"),
9411 input_bfd,
9412 sym_name,
9413 howto->name,
9414 name);
9415
9416 bfd_set_error (bfd_error_bad_value);
9417 ret = FALSE;
9418 goto copy_reloc;
9419 }
9420
9421 if (sda == NULL || !is_static_defined (sda))
9422 {
9423 unresolved_reloc = TRUE;
9424 break;
9425 }
9426 value = relocation + addend - SYM_VAL (sda);
9427
9428 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9429 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9430 contents + rel->r_offset, value,
9431 split16a_type,
9432 htab->params->vle_reloc_fixup);
9433 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9434 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9435 contents + rel->r_offset, value,
9436 split16d_type,
9437 htab->params->vle_reloc_fixup);
9438 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9439 {
9440 value = value >> 16;
9441 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9442 contents + rel->r_offset, value,
9443 split16a_type,
9444 htab->params->vle_reloc_fixup);
9445 }
9446 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9447 {
9448 value = value >> 16;
9449 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9450 contents + rel->r_offset, value,
9451 split16d_type,
9452 htab->params->vle_reloc_fixup);
9453 }
9454 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9455 {
9456 value = (value + 0x8000) >> 16;
9457 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9458 contents + rel->r_offset, value,
9459 split16a_type,
9460 htab->params->vle_reloc_fixup);
9461 }
9462 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
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 split16d_type,
9468 htab->params->vle_reloc_fixup);
9469 }
9470 }
9471 goto copy_reloc;
9472
9473 /* Relocate against the beginning of the section. */
9474 case R_PPC_SECTOFF:
9475 case R_PPC_SECTOFF_LO:
9476 case R_PPC_SECTOFF_HI:
9477 case R_PPC_SECTOFF_HA:
9478 if (sec == NULL || sec->output_section == NULL)
9479 {
9480 unresolved_reloc = TRUE;
9481 break;
9482 }
9483 addend -= sec->output_section->vma;
9484 break;
9485
9486 /* Negative relocations. */
9487 case R_PPC_EMB_NADDR32:
9488 case R_PPC_EMB_NADDR16:
9489 case R_PPC_EMB_NADDR16_LO:
9490 case R_PPC_EMB_NADDR16_HI:
9491 case R_PPC_EMB_NADDR16_HA:
9492 addend -= 2 * relocation;
9493 break;
9494
9495 case R_PPC_COPY:
9496 case R_PPC_GLOB_DAT:
9497 case R_PPC_JMP_SLOT:
9498 case R_PPC_RELATIVE:
9499 case R_PPC_IRELATIVE:
9500 case R_PPC_PLT32:
9501 case R_PPC_PLTREL32:
9502 case R_PPC_PLT16_LO:
9503 case R_PPC_PLT16_HI:
9504 case R_PPC_PLT16_HA:
9505 case R_PPC_ADDR30:
9506 case R_PPC_EMB_RELSEC16:
9507 case R_PPC_EMB_RELST_LO:
9508 case R_PPC_EMB_RELST_HI:
9509 case R_PPC_EMB_RELST_HA:
9510 case R_PPC_EMB_BIT_FLD:
9511 info->callbacks->einfo
9512 /* xgettext:c-format */
9513 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9514 input_bfd,
9515 howto->name,
9516 sym_name);
9517
9518 bfd_set_error (bfd_error_invalid_operation);
9519 ret = FALSE;
9520 goto copy_reloc;
9521 }
9522
9523 /* Do any further special processing. */
9524 switch (r_type)
9525 {
9526 default:
9527 break;
9528
9529 case R_PPC_ADDR16_HA:
9530 case R_PPC_REL16_HA:
9531 case R_PPC_REL16DX_HA:
9532 case R_PPC_SECTOFF_HA:
9533 case R_PPC_TPREL16_HA:
9534 case R_PPC_DTPREL16_HA:
9535 case R_PPC_EMB_NADDR16_HA:
9536 case R_PPC_EMB_RELST_HA:
9537 /* It's just possible that this symbol is a weak symbol
9538 that's not actually defined anywhere. In that case,
9539 'sec' would be NULL, and we should leave the symbol
9540 alone (it will be set to zero elsewhere in the link). */
9541 if (sec == NULL)
9542 break;
9543 /* Fall through. */
9544
9545 case R_PPC_PLT16_HA:
9546 case R_PPC_GOT16_HA:
9547 case R_PPC_GOT_TLSGD16_HA:
9548 case R_PPC_GOT_TLSLD16_HA:
9549 case R_PPC_GOT_TPREL16_HA:
9550 case R_PPC_GOT_DTPREL16_HA:
9551 /* Add 0x10000 if sign bit in 0:15 is set.
9552 Bits 0:15 are not used. */
9553 addend += 0x8000;
9554 break;
9555
9556 case R_PPC_ADDR16:
9557 case R_PPC_ADDR16_LO:
9558 case R_PPC_GOT16:
9559 case R_PPC_GOT16_LO:
9560 case R_PPC_SDAREL16:
9561 case R_PPC_SECTOFF:
9562 case R_PPC_SECTOFF_LO:
9563 case R_PPC_DTPREL16:
9564 case R_PPC_DTPREL16_LO:
9565 case R_PPC_TPREL16:
9566 case R_PPC_TPREL16_LO:
9567 case R_PPC_GOT_TLSGD16:
9568 case R_PPC_GOT_TLSGD16_LO:
9569 case R_PPC_GOT_TLSLD16:
9570 case R_PPC_GOT_TLSLD16_LO:
9571 case R_PPC_GOT_DTPREL16:
9572 case R_PPC_GOT_DTPREL16_LO:
9573 case R_PPC_GOT_TPREL16:
9574 case R_PPC_GOT_TPREL16_LO:
9575 {
9576 /* The 32-bit ABI lacks proper relocations to deal with
9577 certain 64-bit instructions. Prevent damage to bits
9578 that make up part of the insn opcode. */
9579 unsigned int insn, mask, lobit;
9580
9581 insn = bfd_get_32 (input_bfd,
9582 contents + rel->r_offset - d_offset);
9583 mask = 0;
9584 if (is_insn_ds_form (insn))
9585 mask = 3;
9586 else if (is_insn_dq_form (insn))
9587 mask = 15;
9588 else
9589 break;
9590 relocation += addend;
9591 addend = insn & mask;
9592 lobit = mask & relocation;
9593 if (lobit != 0)
9594 {
9595 relocation ^= lobit;
9596 info->callbacks->einfo
9597 /* xgettext:c-format */
9598 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9599 input_bfd, input_section, rel->r_offset,
9600 howto->name, sym_name, mask + 1);
9601 bfd_set_error (bfd_error_bad_value);
9602 ret = FALSE;
9603 }
9604 }
9605 break;
9606 }
9607
9608 #ifdef DEBUG
9609 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9610 "offset = %ld, addend = %ld\n",
9611 howto->name,
9612 (int) r_type,
9613 sym_name,
9614 r_symndx,
9615 (long) rel->r_offset,
9616 (long) addend);
9617 #endif
9618
9619 if (unresolved_reloc
9620 && !((input_section->flags & SEC_DEBUGGING) != 0
9621 && h->def_dynamic)
9622 && _bfd_elf_section_offset (output_bfd, info, input_section,
9623 rel->r_offset) != (bfd_vma) -1)
9624 {
9625 info->callbacks->einfo
9626 /* xgettext:c-format */
9627 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9628 input_bfd, input_section, rel->r_offset,
9629 howto->name,
9630 sym_name);
9631 ret = FALSE;
9632 }
9633
9634 /* 16-bit fields in insns mostly have signed values, but a
9635 few insns have 16-bit unsigned values. Really, we should
9636 have different reloc types. */
9637 if (howto->complain_on_overflow != complain_overflow_dont
9638 && howto->dst_mask == 0xffff
9639 && (input_section->flags & SEC_CODE) != 0)
9640 {
9641 enum complain_overflow complain = complain_overflow_signed;
9642
9643 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9644 {
9645 unsigned int insn;
9646
9647 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9648 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9649 complain = complain_overflow_bitfield;
9650 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9651 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9652 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9653 complain = complain_overflow_unsigned;
9654 }
9655 if (howto->complain_on_overflow != complain)
9656 {
9657 alt_howto = *howto;
9658 alt_howto.complain_on_overflow = complain;
9659 howto = &alt_howto;
9660 }
9661 }
9662
9663 if (r_type == R_PPC_REL16DX_HA)
9664 {
9665 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9666 if (rel->r_offset + 4 > input_section->size)
9667 r = bfd_reloc_outofrange;
9668 else
9669 {
9670 unsigned int insn;
9671
9672 relocation += addend;
9673 relocation -= (rel->r_offset
9674 + input_section->output_offset
9675 + input_section->output_section->vma);
9676 relocation >>= 16;
9677 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9678 insn &= ~0x1fffc1;
9679 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9680 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9681 r = bfd_reloc_ok;
9682 }
9683 }
9684 else
9685 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9686 rel->r_offset, relocation, addend);
9687
9688 if (r != bfd_reloc_ok)
9689 {
9690 if (r == bfd_reloc_overflow)
9691 {
9692 overflow:
9693 /* On code like "if (foo) foo();" don't report overflow
9694 on a branch to zero when foo is undefined. */
9695 if (!warned
9696 && !(h != NULL
9697 && (h->root.type == bfd_link_hash_undefweak
9698 || h->root.type == bfd_link_hash_undefined)
9699 && is_branch_reloc (r_type)))
9700 info->callbacks->reloc_overflow
9701 (info, (h ? &h->root : NULL), sym_name, howto->name,
9702 rel->r_addend, input_bfd, input_section, rel->r_offset);
9703 }
9704 else
9705 {
9706 info->callbacks->einfo
9707 /* xgettext:c-format */
9708 (_("%H: %s reloc against `%s': error %d\n"),
9709 input_bfd, input_section, rel->r_offset,
9710 howto->name, sym_name, (int) r);
9711 ret = FALSE;
9712 }
9713 }
9714 copy_reloc:
9715 if (wrel != rel)
9716 *wrel = *rel;
9717 }
9718
9719 if (wrel != rel)
9720 {
9721 Elf_Internal_Shdr *rel_hdr;
9722 size_t deleted = rel - wrel;
9723
9724 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9725 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9726 if (rel_hdr->sh_size == 0)
9727 {
9728 /* It is too late to remove an empty reloc section. Leave
9729 one NONE reloc.
9730 ??? What is wrong with an empty section??? */
9731 rel_hdr->sh_size = rel_hdr->sh_entsize;
9732 deleted -= 1;
9733 wrel++;
9734 }
9735 relend = wrel;
9736 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9737 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9738 input_section->reloc_count -= deleted;
9739 }
9740
9741 #ifdef DEBUG
9742 fprintf (stderr, "\n");
9743 #endif
9744
9745 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9746 && input_section->size != input_section->rawsize
9747 && (strcmp (input_section->output_section->name, ".init") == 0
9748 || strcmp (input_section->output_section->name, ".fini") == 0))
9749 {
9750 /* Branch around the trampolines. */
9751 unsigned int insn = B + input_section->size - input_section->rawsize;
9752 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9753 }
9754
9755 if (htab->params->ppc476_workaround
9756 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9757 && (!bfd_link_relocatable (info)
9758 || (input_section->output_section->alignment_power
9759 >= htab->params->pagesize_p2)))
9760 {
9761 bfd_vma start_addr, end_addr, addr;
9762 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9763
9764 if (relax_info->workaround_size != 0)
9765 {
9766 bfd_byte *p;
9767 unsigned int n;
9768 bfd_byte fill[4];
9769
9770 bfd_put_32 (input_bfd, BA, fill);
9771 p = contents + input_section->size - relax_info->workaround_size;
9772 n = relax_info->workaround_size >> 2;
9773 while (n--)
9774 {
9775 memcpy (p, fill, 4);
9776 p += 4;
9777 }
9778 }
9779
9780 /* The idea is: Replace the last instruction on a page with a
9781 branch to a patch area. Put the insn there followed by a
9782 branch back to the next page. Complicated a little by
9783 needing to handle moved conditional branches, and by not
9784 wanting to touch data-in-text. */
9785
9786 start_addr = (input_section->output_section->vma
9787 + input_section->output_offset);
9788 end_addr = (start_addr + input_section->size
9789 - relax_info->workaround_size);
9790 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9791 addr < end_addr;
9792 addr += pagesize)
9793 {
9794 bfd_vma offset = addr - start_addr;
9795 Elf_Internal_Rela *lo, *hi;
9796 bfd_boolean is_data;
9797 bfd_vma patch_off, patch_addr;
9798 unsigned int insn;
9799
9800 /* Do we have a data reloc at this offset? If so, leave
9801 the word alone. */
9802 is_data = FALSE;
9803 lo = relocs;
9804 hi = relend;
9805 rel = NULL;
9806 while (lo < hi)
9807 {
9808 rel = lo + (hi - lo) / 2;
9809 if (rel->r_offset < offset)
9810 lo = rel + 1;
9811 else if (rel->r_offset > offset + 3)
9812 hi = rel;
9813 else
9814 {
9815 switch (ELF32_R_TYPE (rel->r_info))
9816 {
9817 case R_PPC_ADDR32:
9818 case R_PPC_UADDR32:
9819 case R_PPC_REL32:
9820 case R_PPC_ADDR30:
9821 is_data = TRUE;
9822 break;
9823 default:
9824 break;
9825 }
9826 break;
9827 }
9828 }
9829 if (is_data)
9830 continue;
9831
9832 /* Some instructions can be left alone too. Unconditional
9833 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9834 avoid the icache failure.
9835
9836 The problem occurs due to prefetch across a page boundary
9837 where stale instructions can be fetched from the next
9838 page, and the mechanism for flushing these bad
9839 instructions fails under certain circumstances. The
9840 unconditional branches:
9841 1) Branch: b, bl, ba, bla,
9842 2) Branch Conditional: bc, bca, bcl, bcla,
9843 3) Branch Conditional to Link Register: bclr, bclrl,
9844 where (2) and (3) have BO=0x14 making them unconditional,
9845 prevent the bad prefetch because the prefetch itself is
9846 affected by these instructions. This happens even if the
9847 instruction is not executed.
9848
9849 A bctr example:
9850 .
9851 . lis 9,new_page@ha
9852 . addi 9,9,new_page@l
9853 . mtctr 9
9854 . bctr
9855 . nop
9856 . nop
9857 . new_page:
9858 .
9859 The bctr is not predicted taken due to ctr not being
9860 ready, so prefetch continues on past the bctr into the
9861 new page which might have stale instructions. If they
9862 fail to be flushed, then they will be executed after the
9863 bctr executes. Either of the following modifications
9864 prevent the bad prefetch from happening in the first
9865 place:
9866 .
9867 . lis 9,new_page@ha lis 9,new_page@ha
9868 . addi 9,9,new_page@l addi 9,9,new_page@l
9869 . mtctr 9 mtctr 9
9870 . bctr bctr
9871 . nop b somewhere_else
9872 . b somewhere_else nop
9873 . new_page: new_page:
9874 . */
9875 insn = bfd_get_32 (input_bfd, contents + offset);
9876 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9877 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9878 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9879 || ((insn & (0x3f << 26)) == (19u << 26)
9880 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9881 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9882 continue;
9883
9884 patch_addr = (start_addr + input_section->size
9885 - relax_info->workaround_size);
9886 patch_addr = (patch_addr + 15) & -16;
9887 patch_off = patch_addr - start_addr;
9888 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9889
9890 if (rel != NULL
9891 && rel->r_offset >= offset
9892 && rel->r_offset < offset + 4)
9893 {
9894 asection *sreloc;
9895
9896 /* If the insn we are patching had a reloc, adjust the
9897 reloc r_offset so that the reloc applies to the moved
9898 location. This matters for -r and --emit-relocs. */
9899 if (rel + 1 != relend)
9900 {
9901 Elf_Internal_Rela tmp = *rel;
9902
9903 /* Keep the relocs sorted by r_offset. */
9904 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9905 relend[-1] = tmp;
9906 }
9907 relend[-1].r_offset += patch_off - offset;
9908
9909 /* Adjust REL16 addends too. */
9910 switch (ELF32_R_TYPE (relend[-1].r_info))
9911 {
9912 case R_PPC_REL16:
9913 case R_PPC_REL16_LO:
9914 case R_PPC_REL16_HI:
9915 case R_PPC_REL16_HA:
9916 relend[-1].r_addend += patch_off - offset;
9917 break;
9918 default:
9919 break;
9920 }
9921
9922 /* If we are building a PIE or shared library with
9923 non-PIC objects, perhaps we had a dynamic reloc too?
9924 If so, the dynamic reloc must move with the insn. */
9925 sreloc = elf_section_data (input_section)->sreloc;
9926 if (sreloc != NULL)
9927 {
9928 Elf32_External_Rela *slo, *shi, *srelend;
9929 bfd_vma soffset;
9930
9931 slo = (Elf32_External_Rela *) sreloc->contents;
9932 shi = srelend = slo + sreloc->reloc_count;
9933 soffset = (offset + input_section->output_section->vma
9934 + input_section->output_offset);
9935 while (slo < shi)
9936 {
9937 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9938 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9939 &outrel);
9940 if (outrel.r_offset < soffset)
9941 slo = srel + 1;
9942 else if (outrel.r_offset > soffset + 3)
9943 shi = srel;
9944 else
9945 {
9946 if (srel + 1 != srelend)
9947 {
9948 memmove (srel, srel + 1,
9949 (srelend - (srel + 1)) * sizeof (*srel));
9950 srel = srelend - 1;
9951 }
9952 outrel.r_offset += patch_off - offset;
9953 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9954 (bfd_byte *) srel);
9955 break;
9956 }
9957 }
9958 }
9959 }
9960 else
9961 rel = NULL;
9962
9963 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9964 && (insn & 2) == 0 /* relative */)
9965 {
9966 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9967
9968 delta += offset - patch_off;
9969 if (bfd_link_relocatable (info) && rel != NULL)
9970 delta = 0;
9971 if (!bfd_link_relocatable (info) && rel != NULL)
9972 {
9973 enum elf_ppc_reloc_type r_type;
9974
9975 r_type = ELF32_R_TYPE (relend[-1].r_info);
9976 if (r_type == R_PPC_REL14_BRTAKEN)
9977 insn |= BRANCH_PREDICT_BIT;
9978 else if (r_type == R_PPC_REL14_BRNTAKEN)
9979 insn &= ~BRANCH_PREDICT_BIT;
9980 else
9981 BFD_ASSERT (r_type == R_PPC_REL14);
9982
9983 if ((r_type == R_PPC_REL14_BRTAKEN
9984 || r_type == R_PPC_REL14_BRNTAKEN)
9985 && delta + 0x8000 < 0x10000
9986 && (bfd_signed_vma) delta < 0)
9987 insn ^= BRANCH_PREDICT_BIT;
9988 }
9989 if (delta + 0x8000 < 0x10000)
9990 {
9991 bfd_put_32 (input_bfd,
9992 (insn & ~0xfffc) | (delta & 0xfffc),
9993 contents + patch_off);
9994 patch_off += 4;
9995 bfd_put_32 (input_bfd,
9996 B | ((offset + 4 - patch_off) & 0x3fffffc),
9997 contents + patch_off);
9998 patch_off += 4;
9999 }
10000 else
10001 {
10002 if (rel != NULL)
10003 {
10004 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10005
10006 relend[-1].r_offset += 8;
10007 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10008 }
10009 bfd_put_32 (input_bfd,
10010 (insn & ~0xfffc) | 8,
10011 contents + patch_off);
10012 patch_off += 4;
10013 bfd_put_32 (input_bfd,
10014 B | ((offset + 4 - patch_off) & 0x3fffffc),
10015 contents + patch_off);
10016 patch_off += 4;
10017 bfd_put_32 (input_bfd,
10018 B | ((delta - 8) & 0x3fffffc),
10019 contents + patch_off);
10020 patch_off += 4;
10021 }
10022 }
10023 else
10024 {
10025 bfd_put_32 (input_bfd, insn, contents + patch_off);
10026 patch_off += 4;
10027 bfd_put_32 (input_bfd,
10028 B | ((offset + 4 - patch_off) & 0x3fffffc),
10029 contents + patch_off);
10030 patch_off += 4;
10031 }
10032 BFD_ASSERT (patch_off <= input_section->size);
10033 relax_info->workaround_size = input_section->size - patch_off;
10034 }
10035 }
10036
10037 return ret;
10038 }
10039 \f
10040 /* Finish up dynamic symbol handling. We set the contents of various
10041 dynamic sections here. */
10042
10043 static bfd_boolean
10044 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10045 struct bfd_link_info *info,
10046 struct elf_link_hash_entry *h,
10047 Elf_Internal_Sym *sym)
10048 {
10049 struct ppc_elf_link_hash_table *htab;
10050 struct plt_entry *ent;
10051 bfd_boolean doneone;
10052
10053 #ifdef DEBUG
10054 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10055 h->root.root.string);
10056 #endif
10057
10058 htab = ppc_elf_hash_table (info);
10059 BFD_ASSERT (htab->elf.dynobj != NULL);
10060
10061 doneone = FALSE;
10062 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10063 if (ent->plt.offset != (bfd_vma) -1)
10064 {
10065 if (!doneone)
10066 {
10067 Elf_Internal_Rela rela;
10068 bfd_byte *loc;
10069 bfd_vma reloc_index;
10070
10071 if (htab->plt_type == PLT_NEW
10072 || !htab->elf.dynamic_sections_created
10073 || h->dynindx == -1)
10074 reloc_index = ent->plt.offset / 4;
10075 else
10076 {
10077 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10078 / htab->plt_slot_size);
10079 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10080 && htab->plt_type == PLT_OLD)
10081 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10082 }
10083
10084 /* This symbol has an entry in the procedure linkage table.
10085 Set it up. */
10086 if (htab->plt_type == PLT_VXWORKS
10087 && htab->elf.dynamic_sections_created
10088 && h->dynindx != -1)
10089 {
10090 bfd_vma got_offset;
10091 const bfd_vma *plt_entry;
10092
10093 /* The first three entries in .got.plt are reserved. */
10094 got_offset = (reloc_index + 3) * 4;
10095
10096 /* Use the right PLT. */
10097 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10098 : ppc_elf_vxworks_plt_entry;
10099
10100 /* Fill in the .plt on VxWorks. */
10101 if (bfd_link_pic (info))
10102 {
10103 bfd_put_32 (output_bfd,
10104 plt_entry[0] | PPC_HA (got_offset),
10105 htab->elf.splt->contents + ent->plt.offset + 0);
10106 bfd_put_32 (output_bfd,
10107 plt_entry[1] | PPC_LO (got_offset),
10108 htab->elf.splt->contents + ent->plt.offset + 4);
10109 }
10110 else
10111 {
10112 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10113
10114 bfd_put_32 (output_bfd,
10115 plt_entry[0] | PPC_HA (got_loc),
10116 htab->elf.splt->contents + ent->plt.offset + 0);
10117 bfd_put_32 (output_bfd,
10118 plt_entry[1] | PPC_LO (got_loc),
10119 htab->elf.splt->contents + ent->plt.offset + 4);
10120 }
10121
10122 bfd_put_32 (output_bfd, plt_entry[2],
10123 htab->elf.splt->contents + ent->plt.offset + 8);
10124 bfd_put_32 (output_bfd, plt_entry[3],
10125 htab->elf.splt->contents + ent->plt.offset + 12);
10126
10127 /* This instruction is an immediate load. The value loaded is
10128 the byte offset of the R_PPC_JMP_SLOT relocation from the
10129 start of the .rela.plt section. The value is stored in the
10130 low-order 16 bits of the load instruction. */
10131 /* NOTE: It appears that this is now an index rather than a
10132 prescaled offset. */
10133 bfd_put_32 (output_bfd,
10134 plt_entry[4] | reloc_index,
10135 htab->elf.splt->contents + ent->plt.offset + 16);
10136 /* This instruction is a PC-relative branch whose target is
10137 the start of the PLT section. The address of this branch
10138 instruction is 20 bytes beyond the start of this PLT entry.
10139 The address is encoded in bits 6-29, inclusive. The value
10140 stored is right-shifted by two bits, permitting a 26-bit
10141 offset. */
10142 bfd_put_32 (output_bfd,
10143 (plt_entry[5]
10144 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10145 htab->elf.splt->contents + ent->plt.offset + 20);
10146 bfd_put_32 (output_bfd, plt_entry[6],
10147 htab->elf.splt->contents + ent->plt.offset + 24);
10148 bfd_put_32 (output_bfd, plt_entry[7],
10149 htab->elf.splt->contents + ent->plt.offset + 28);
10150
10151 /* Fill in the GOT entry corresponding to this PLT slot with
10152 the address immediately after the "bctr" instruction
10153 in this PLT entry. */
10154 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10155 + htab->elf.splt->output_offset
10156 + ent->plt.offset + 16),
10157 htab->elf.sgotplt->contents + got_offset);
10158
10159 if (!bfd_link_pic (info))
10160 {
10161 /* Fill in a couple of entries in .rela.plt.unloaded. */
10162 loc = htab->srelplt2->contents
10163 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10164 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10165 * sizeof (Elf32_External_Rela));
10166
10167 /* Provide the @ha relocation for the first instruction. */
10168 rela.r_offset = (htab->elf.splt->output_section->vma
10169 + htab->elf.splt->output_offset
10170 + ent->plt.offset + 2);
10171 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10172 R_PPC_ADDR16_HA);
10173 rela.r_addend = got_offset;
10174 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10175 loc += sizeof (Elf32_External_Rela);
10176
10177 /* Provide the @l relocation for the second instruction. */
10178 rela.r_offset = (htab->elf.splt->output_section->vma
10179 + htab->elf.splt->output_offset
10180 + ent->plt.offset + 6);
10181 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10182 R_PPC_ADDR16_LO);
10183 rela.r_addend = got_offset;
10184 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10185 loc += sizeof (Elf32_External_Rela);
10186
10187 /* Provide a relocation for the GOT entry corresponding to this
10188 PLT slot. Point it at the middle of the .plt entry. */
10189 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10190 + htab->elf.sgotplt->output_offset
10191 + got_offset);
10192 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10193 R_PPC_ADDR32);
10194 rela.r_addend = ent->plt.offset + 16;
10195 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10196 }
10197
10198 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10199 In particular, the offset for the relocation is not the
10200 address of the PLT entry for this function, as specified
10201 by the ABI. Instead, the offset is set to the address of
10202 the GOT slot for this function. See EABI 4.4.4.1. */
10203 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10204 + htab->elf.sgotplt->output_offset
10205 + got_offset);
10206
10207 }
10208 else
10209 {
10210 asection *splt = htab->elf.splt;
10211 if (!htab->elf.dynamic_sections_created
10212 || h->dynindx == -1)
10213 splt = htab->elf.iplt;
10214
10215 rela.r_offset = (splt->output_section->vma
10216 + splt->output_offset
10217 + ent->plt.offset);
10218 if (htab->plt_type == PLT_OLD
10219 || !htab->elf.dynamic_sections_created
10220 || h->dynindx == -1)
10221 {
10222 /* We don't need to fill in the .plt. The ppc dynamic
10223 linker will fill it in. */
10224 }
10225 else
10226 {
10227 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10228 + htab->glink->output_section->vma
10229 + htab->glink->output_offset);
10230 bfd_put_32 (output_bfd, val,
10231 splt->contents + ent->plt.offset);
10232 }
10233 }
10234
10235 /* Fill in the entry in the .rela.plt section. */
10236 rela.r_addend = 0;
10237 if (!htab->elf.dynamic_sections_created
10238 || h->dynindx == -1)
10239 {
10240 BFD_ASSERT (h->type == STT_GNU_IFUNC
10241 && h->def_regular
10242 && (h->root.type == bfd_link_hash_defined
10243 || h->root.type == bfd_link_hash_defweak));
10244 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10245 rela.r_addend = SYM_VAL (h);
10246 }
10247 else
10248 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10249
10250 if (!htab->elf.dynamic_sections_created
10251 || h->dynindx == -1)
10252 {
10253 loc = (htab->elf.irelplt->contents
10254 + (htab->elf.irelplt->reloc_count++
10255 * sizeof (Elf32_External_Rela)));
10256 htab->local_ifunc_resolver = 1;
10257 }
10258 else
10259 {
10260 loc = (htab->elf.srelplt->contents
10261 + reloc_index * sizeof (Elf32_External_Rela));
10262 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10263 htab->maybe_local_ifunc_resolver = 1;
10264 }
10265 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10266
10267 if (!h->def_regular)
10268 {
10269 /* Mark the symbol as undefined, rather than as
10270 defined in the .plt section. Leave the value if
10271 there were any relocations where pointer equality
10272 matters (this is a clue for the dynamic linker, to
10273 make function pointer comparisons work between an
10274 application and shared library), otherwise set it
10275 to zero. */
10276 sym->st_shndx = SHN_UNDEF;
10277 if (!h->pointer_equality_needed)
10278 sym->st_value = 0;
10279 else if (!h->ref_regular_nonweak)
10280 {
10281 /* This breaks function pointer comparisons, but
10282 that is better than breaking tests for a NULL
10283 function pointer. */
10284 sym->st_value = 0;
10285 }
10286 }
10287 else if (h->type == STT_GNU_IFUNC
10288 && !bfd_link_pic (info))
10289 {
10290 /* Set the value of ifunc symbols in a non-pie
10291 executable to the glink entry. This is to avoid
10292 text relocations. We can't do this for ifunc in
10293 allocate_dynrelocs, as we do for normal dynamic
10294 function symbols with plt entries, because we need
10295 to keep the original value around for the ifunc
10296 relocation. */
10297 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10298 (output_bfd, htab->glink->output_section));
10299 sym->st_value = (ent->glink_offset
10300 + htab->glink->output_offset
10301 + htab->glink->output_section->vma);
10302 }
10303 doneone = TRUE;
10304 }
10305
10306 if (htab->plt_type == PLT_NEW
10307 || !htab->elf.dynamic_sections_created
10308 || h->dynindx == -1)
10309 {
10310 unsigned char *p;
10311 asection *splt = htab->elf.splt;
10312 if (!htab->elf.dynamic_sections_created
10313 || h->dynindx == -1)
10314 splt = htab->elf.iplt;
10315
10316 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10317
10318 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10319 {
10320 bfd_put_32 (output_bfd, LWZ_11_3, p);
10321 p += 4;
10322 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10323 p += 4;
10324 bfd_put_32 (output_bfd, MR_0_3, p);
10325 p += 4;
10326 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10327 p += 4;
10328 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10329 p += 4;
10330 bfd_put_32 (output_bfd, BEQLR, p);
10331 p += 4;
10332 bfd_put_32 (output_bfd, MR_3_0, p);
10333 p += 4;
10334 bfd_put_32 (output_bfd, NOP, p);
10335 p += 4;
10336 }
10337
10338 write_glink_stub (ent, splt, p, info);
10339
10340 if (!bfd_link_pic (info))
10341 /* We only need one non-PIC glink stub. */
10342 break;
10343 }
10344 else
10345 break;
10346 }
10347
10348 if (h->needs_copy)
10349 {
10350 asection *s;
10351 Elf_Internal_Rela rela;
10352 bfd_byte *loc;
10353
10354 /* This symbols needs a copy reloc. Set it up. */
10355
10356 #ifdef DEBUG
10357 fprintf (stderr, ", copy");
10358 #endif
10359
10360 BFD_ASSERT (h->dynindx != -1);
10361
10362 if (ppc_elf_hash_entry (h)->has_sda_refs)
10363 s = htab->relsbss;
10364 else if (h->root.u.def.section == htab->elf.sdynrelro)
10365 s = htab->elf.sreldynrelro;
10366 else
10367 s = htab->elf.srelbss;
10368 BFD_ASSERT (s != NULL);
10369
10370 rela.r_offset = SYM_VAL (h);
10371 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10372 rela.r_addend = 0;
10373 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10374 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10375 }
10376
10377 #ifdef DEBUG
10378 fprintf (stderr, "\n");
10379 #endif
10380
10381 return TRUE;
10382 }
10383 \f
10384 static enum elf_reloc_type_class
10385 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10386 const asection *rel_sec,
10387 const Elf_Internal_Rela *rela)
10388 {
10389 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10390
10391 if (rel_sec == htab->elf.irelplt)
10392 return reloc_class_ifunc;
10393
10394 switch (ELF32_R_TYPE (rela->r_info))
10395 {
10396 case R_PPC_RELATIVE:
10397 return reloc_class_relative;
10398 case R_PPC_JMP_SLOT:
10399 return reloc_class_plt;
10400 case R_PPC_COPY:
10401 return reloc_class_copy;
10402 default:
10403 return reloc_class_normal;
10404 }
10405 }
10406 \f
10407 /* Finish up the dynamic sections. */
10408
10409 static bfd_boolean
10410 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10411 struct bfd_link_info *info)
10412 {
10413 asection *sdyn;
10414 struct ppc_elf_link_hash_table *htab;
10415 bfd_vma got;
10416 bfd *dynobj;
10417 bfd_boolean ret = TRUE;
10418
10419 #ifdef DEBUG
10420 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10421 #endif
10422
10423 htab = ppc_elf_hash_table (info);
10424 dynobj = htab->elf.dynobj;
10425 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10426
10427 got = 0;
10428 if (htab->elf.hgot != NULL)
10429 got = SYM_VAL (htab->elf.hgot);
10430
10431 if (htab->elf.dynamic_sections_created)
10432 {
10433 Elf32_External_Dyn *dyncon, *dynconend;
10434
10435 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10436
10437 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10438 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10439 for (; dyncon < dynconend; dyncon++)
10440 {
10441 Elf_Internal_Dyn dyn;
10442 asection *s;
10443
10444 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10445
10446 switch (dyn.d_tag)
10447 {
10448 case DT_PLTGOT:
10449 if (htab->is_vxworks)
10450 s = htab->elf.sgotplt;
10451 else
10452 s = htab->elf.splt;
10453 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10454 break;
10455
10456 case DT_PLTRELSZ:
10457 dyn.d_un.d_val = htab->elf.srelplt->size;
10458 break;
10459
10460 case DT_JMPREL:
10461 s = htab->elf.srelplt;
10462 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10463 break;
10464
10465 case DT_PPC_GOT:
10466 dyn.d_un.d_ptr = got;
10467 break;
10468
10469 case DT_TEXTREL:
10470 if (htab->local_ifunc_resolver)
10471 info->callbacks->einfo
10472 (_("%X%P: text relocations and GNU indirect "
10473 "functions will result in a segfault at runtime\n"));
10474 else if (htab->maybe_local_ifunc_resolver)
10475 info->callbacks->einfo
10476 (_("%P: warning: text relocations and GNU indirect "
10477 "functions may result in a segfault at runtime\n"));
10478 continue;
10479
10480 default:
10481 if (htab->is_vxworks
10482 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10483 break;
10484 continue;
10485 }
10486
10487 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10488 }
10489 }
10490
10491 if (htab->elf.sgot != NULL
10492 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10493 {
10494 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10495 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10496 {
10497 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10498
10499 p += htab->elf.hgot->root.u.def.value;
10500 if (htab->plt_type == PLT_OLD)
10501 {
10502 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10503 so that a function can easily find the address of
10504 _GLOBAL_OFFSET_TABLE_. */
10505 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10506 < htab->elf.hgot->root.u.def.section->size);
10507 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10508 }
10509
10510 if (sdyn != NULL)
10511 {
10512 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10513 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10514 < htab->elf.hgot->root.u.def.section->size);
10515 bfd_put_32 (output_bfd, val, p);
10516 }
10517 }
10518 else
10519 {
10520 /* xgettext:c-format */
10521 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10522 htab->elf.hgot->root.root.string,
10523 (htab->elf.sgotplt != NULL
10524 ? htab->elf.sgotplt->name
10525 : htab->elf.sgot->name));
10526 bfd_set_error (bfd_error_bad_value);
10527 ret = FALSE;
10528 }
10529
10530 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10531 }
10532
10533 /* Fill in the first entry in the VxWorks procedure linkage table. */
10534 if (htab->is_vxworks
10535 && htab->elf.splt != NULL
10536 && htab->elf.splt->size != 0
10537 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10538 {
10539 asection *splt = htab->elf.splt;
10540 /* Use the right PLT. */
10541 const bfd_vma *plt_entry = (bfd_link_pic (info)
10542 ? ppc_elf_vxworks_pic_plt0_entry
10543 : ppc_elf_vxworks_plt0_entry);
10544
10545 if (!bfd_link_pic (info))
10546 {
10547 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10548
10549 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10550 splt->contents + 0);
10551 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10552 splt->contents + 4);
10553 }
10554 else
10555 {
10556 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10557 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10558 }
10559 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10560 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10561 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10562 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10563 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10564 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10565
10566 if (! bfd_link_pic (info))
10567 {
10568 Elf_Internal_Rela rela;
10569 bfd_byte *loc;
10570
10571 loc = htab->srelplt2->contents;
10572
10573 /* Output the @ha relocation for the first instruction. */
10574 rela.r_offset = (htab->elf.splt->output_section->vma
10575 + htab->elf.splt->output_offset
10576 + 2);
10577 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10578 rela.r_addend = 0;
10579 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10580 loc += sizeof (Elf32_External_Rela);
10581
10582 /* Output the @l relocation for the second instruction. */
10583 rela.r_offset = (htab->elf.splt->output_section->vma
10584 + htab->elf.splt->output_offset
10585 + 6);
10586 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10587 rela.r_addend = 0;
10588 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10589 loc += sizeof (Elf32_External_Rela);
10590
10591 /* Fix up the remaining relocations. They may have the wrong
10592 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10593 in which symbols were output. */
10594 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10595 {
10596 Elf_Internal_Rela rel;
10597
10598 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10599 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10600 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10601 loc += sizeof (Elf32_External_Rela);
10602
10603 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10604 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10605 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10606 loc += sizeof (Elf32_External_Rela);
10607
10608 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10609 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10610 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10611 loc += sizeof (Elf32_External_Rela);
10612 }
10613 }
10614 }
10615
10616 if (htab->glink != NULL
10617 && htab->glink->contents != NULL
10618 && htab->elf.dynamic_sections_created)
10619 {
10620 unsigned char *p;
10621 unsigned char *endp;
10622 bfd_vma res0;
10623 unsigned int i;
10624
10625 /*
10626 * PIC glink code is the following:
10627 *
10628 * # ith PLT code stub.
10629 * addis 11,30,(plt+(i-1)*4-got)@ha
10630 * lwz 11,(plt+(i-1)*4-got)@l(11)
10631 * mtctr 11
10632 * bctr
10633 *
10634 * # A table of branches, one for each plt entry.
10635 * # The idea is that the plt call stub loads ctr and r11 with these
10636 * # addresses, so (r11 - res_0) gives the plt index * 4.
10637 * res_0: b PLTresolve
10638 * res_1: b PLTresolve
10639 * .
10640 * # Some number of entries towards the end can be nops
10641 * res_n_m3: nop
10642 * res_n_m2: nop
10643 * res_n_m1:
10644 *
10645 * PLTresolve:
10646 * addis 11,11,(1f-res_0)@ha
10647 * mflr 0
10648 * bcl 20,31,1f
10649 * 1: addi 11,11,(1b-res_0)@l
10650 * mflr 12
10651 * mtlr 0
10652 * sub 11,11,12 # r11 = index * 4
10653 * addis 12,12,(got+4-1b)@ha
10654 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10655 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10656 * mtctr 0
10657 * add 0,11,11
10658 * add 11,0,11 # r11 = index * 12 = reloc offset.
10659 * bctr
10660 */
10661 static const unsigned int pic_plt_resolve[] =
10662 {
10663 ADDIS_11_11,
10664 MFLR_0,
10665 BCL_20_31,
10666 ADDI_11_11,
10667 MFLR_12,
10668 MTLR_0,
10669 SUB_11_11_12,
10670 ADDIS_12_12,
10671 LWZ_0_12,
10672 LWZ_12_12,
10673 MTCTR_0,
10674 ADD_0_11_11,
10675 ADD_11_0_11,
10676 BCTR,
10677 NOP,
10678 NOP
10679 };
10680
10681 /*
10682 * Non-PIC glink code is a little simpler.
10683 *
10684 * # ith PLT code stub.
10685 * lis 11,(plt+(i-1)*4)@ha
10686 * lwz 11,(plt+(i-1)*4)@l(11)
10687 * mtctr 11
10688 * bctr
10689 *
10690 * The branch table is the same, then comes
10691 *
10692 * PLTresolve:
10693 * lis 12,(got+4)@ha
10694 * addis 11,11,(-res_0)@ha
10695 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10696 * addi 11,11,(-res_0)@l # r11 = index * 4
10697 * mtctr 0
10698 * add 0,11,11
10699 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10700 * add 11,0,11 # r11 = index * 12 = reloc offset.
10701 * bctr
10702 */
10703 static const unsigned int plt_resolve[] =
10704 {
10705 LIS_12,
10706 ADDIS_11_11,
10707 LWZ_0_12,
10708 ADDI_11_11,
10709 MTCTR_0,
10710 ADD_0_11_11,
10711 LWZ_12_12,
10712 ADD_11_0_11,
10713 BCTR,
10714 NOP,
10715 NOP,
10716 NOP,
10717 NOP,
10718 NOP,
10719 NOP,
10720 NOP
10721 };
10722
10723 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10724 abort ();
10725 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10726 abort ();
10727
10728 /* Build the branch table, one for each plt entry (less one),
10729 and perhaps some padding. */
10730 p = htab->glink->contents;
10731 p += htab->glink_pltresolve;
10732 endp = htab->glink->contents;
10733 endp += htab->glink->size - GLINK_PLTRESOLVE;
10734 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10735 {
10736 bfd_put_32 (output_bfd, B + endp - p, p);
10737 p += 4;
10738 }
10739 while (p < endp)
10740 {
10741 bfd_put_32 (output_bfd, NOP, p);
10742 p += 4;
10743 }
10744
10745 res0 = (htab->glink_pltresolve
10746 + htab->glink->output_section->vma
10747 + htab->glink->output_offset);
10748
10749 if (htab->params->ppc476_workaround)
10750 {
10751 /* Ensure that a call stub at the end of a page doesn't
10752 result in prefetch over the end of the page into the
10753 glink branch table. */
10754 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10755 bfd_vma page_addr;
10756 bfd_vma glink_start = (htab->glink->output_section->vma
10757 + htab->glink->output_offset);
10758
10759 for (page_addr = res0 & -pagesize;
10760 page_addr > glink_start;
10761 page_addr -= pagesize)
10762 {
10763 /* We have a plt call stub that may need fixing. */
10764 bfd_byte *loc;
10765 unsigned int insn;
10766
10767 loc = htab->glink->contents + page_addr - 4 - glink_start;
10768 insn = bfd_get_32 (output_bfd, loc);
10769 if (insn == BCTR)
10770 {
10771 /* By alignment, we know that there must be at least
10772 one other call stub before this one. */
10773 insn = bfd_get_32 (output_bfd, loc - 16);
10774 if (insn == BCTR)
10775 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10776 else
10777 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10778 }
10779 }
10780 }
10781
10782 /* Last comes the PLTresolve stub. */
10783 if (bfd_link_pic (info))
10784 {
10785 bfd_vma bcl;
10786
10787 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10788 {
10789 unsigned int insn = pic_plt_resolve[i];
10790
10791 if (htab->params->ppc476_workaround && insn == NOP)
10792 insn = BA + 0;
10793 bfd_put_32 (output_bfd, insn, p);
10794 p += 4;
10795 }
10796 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10797
10798 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10799 + htab->glink->output_section->vma
10800 + htab->glink->output_offset);
10801
10802 bfd_put_32 (output_bfd,
10803 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10804 bfd_put_32 (output_bfd,
10805 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10806 bfd_put_32 (output_bfd,
10807 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10808 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10809 {
10810 bfd_put_32 (output_bfd,
10811 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10812 bfd_put_32 (output_bfd,
10813 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10814 }
10815 else
10816 {
10817 bfd_put_32 (output_bfd,
10818 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10819 bfd_put_32 (output_bfd,
10820 LWZ_12_12 + 4, p + 9*4);
10821 }
10822 }
10823 else
10824 {
10825 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10826 {
10827 unsigned int insn = plt_resolve[i];
10828
10829 if (htab->params->ppc476_workaround && insn == NOP)
10830 insn = BA + 0;
10831 bfd_put_32 (output_bfd, insn, p);
10832 p += 4;
10833 }
10834 p -= 4 * ARRAY_SIZE (plt_resolve);
10835
10836 bfd_put_32 (output_bfd,
10837 LIS_12 + PPC_HA (got + 4), p + 0*4);
10838 bfd_put_32 (output_bfd,
10839 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10840 bfd_put_32 (output_bfd,
10841 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10842 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10843 {
10844 bfd_put_32 (output_bfd,
10845 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10846 bfd_put_32 (output_bfd,
10847 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10848 }
10849 else
10850 {
10851 bfd_put_32 (output_bfd,
10852 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10853 bfd_put_32 (output_bfd,
10854 LWZ_12_12 + 4, p + 6*4);
10855 }
10856 }
10857 }
10858
10859 if (htab->glink_eh_frame != NULL
10860 && htab->glink_eh_frame->contents != NULL)
10861 {
10862 unsigned char *p = htab->glink_eh_frame->contents;
10863 bfd_vma val;
10864
10865 p += sizeof (glink_eh_frame_cie);
10866 /* FDE length. */
10867 p += 4;
10868 /* CIE pointer. */
10869 p += 4;
10870 /* Offset to .glink. */
10871 val = (htab->glink->output_section->vma
10872 + htab->glink->output_offset);
10873 val -= (htab->glink_eh_frame->output_section->vma
10874 + htab->glink_eh_frame->output_offset);
10875 val -= p - htab->glink_eh_frame->contents;
10876 bfd_put_32 (htab->elf.dynobj, val, p);
10877
10878 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10879 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10880 htab->glink_eh_frame,
10881 htab->glink_eh_frame->contents))
10882 return FALSE;
10883 }
10884
10885 return ret;
10886 }
10887 \f
10888 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10889 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10890 #define TARGET_BIG_SYM powerpc_elf32_vec
10891 #define TARGET_BIG_NAME "elf32-powerpc"
10892 #define ELF_ARCH bfd_arch_powerpc
10893 #define ELF_TARGET_ID PPC32_ELF_DATA
10894 #define ELF_MACHINE_CODE EM_PPC
10895 #ifdef __QNXTARGET__
10896 #define ELF_MAXPAGESIZE 0x1000
10897 #define ELF_COMMONPAGESIZE 0x1000
10898 #else
10899 #define ELF_MAXPAGESIZE 0x10000
10900 #define ELF_COMMONPAGESIZE 0x10000
10901 #endif
10902 #define ELF_MINPAGESIZE 0x1000
10903 #define elf_info_to_howto ppc_elf_info_to_howto
10904
10905 #ifdef EM_CYGNUS_POWERPC
10906 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10907 #endif
10908
10909 #ifdef EM_PPC_OLD
10910 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10911 #endif
10912
10913 #define elf_backend_plt_not_loaded 1
10914 #define elf_backend_want_dynrelro 1
10915 #define elf_backend_can_gc_sections 1
10916 #define elf_backend_can_refcount 1
10917 #define elf_backend_rela_normal 1
10918 #define elf_backend_caches_rawsize 1
10919
10920 #define bfd_elf32_mkobject ppc_elf_mkobject
10921 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10922 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10923 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10924 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10925 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10926 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10927 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10928
10929 #define elf_backend_object_p ppc_elf_object_p
10930 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10931 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10932 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10933 #define elf_backend_relocate_section ppc_elf_relocate_section
10934 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10935 #define elf_backend_check_relocs ppc_elf_check_relocs
10936 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10937 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10938 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10939 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10940 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10941 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10942 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10943 #define elf_backend_fake_sections ppc_elf_fake_sections
10944 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10945 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10946 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10947 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10948 #define elf_backend_write_core_note ppc_elf_write_core_note
10949 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10950 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10951 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10952 #define elf_backend_write_section ppc_elf_write_section
10953 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10954 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10955 #define elf_backend_action_discarded ppc_elf_action_discarded
10956 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10957 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10958
10959 #include "elf32-target.h"
10960
10961 /* FreeBSD Target */
10962
10963 #undef TARGET_LITTLE_SYM
10964 #undef TARGET_LITTLE_NAME
10965
10966 #undef TARGET_BIG_SYM
10967 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10968 #undef TARGET_BIG_NAME
10969 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10970
10971 #undef ELF_OSABI
10972 #define ELF_OSABI ELFOSABI_FREEBSD
10973
10974 #undef elf32_bed
10975 #define elf32_bed elf32_powerpc_fbsd_bed
10976
10977 #include "elf32-target.h"
10978
10979 /* VxWorks Target */
10980
10981 #undef TARGET_LITTLE_SYM
10982 #undef TARGET_LITTLE_NAME
10983
10984 #undef TARGET_BIG_SYM
10985 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10986 #undef TARGET_BIG_NAME
10987 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10988
10989 #undef ELF_OSABI
10990
10991 /* VxWorks uses the elf default section flags for .plt. */
10992 static const struct bfd_elf_special_section *
10993 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10994 {
10995 if (sec->name == NULL)
10996 return NULL;
10997
10998 if (strcmp (sec->name, ".plt") == 0)
10999 return _bfd_elf_get_sec_type_attr (abfd, sec);
11000
11001 return ppc_elf_get_sec_type_attr (abfd, sec);
11002 }
11003
11004 /* Like ppc_elf_link_hash_table_create, but overrides
11005 appropriately for VxWorks. */
11006 static struct bfd_link_hash_table *
11007 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11008 {
11009 struct bfd_link_hash_table *ret;
11010
11011 ret = ppc_elf_link_hash_table_create (abfd);
11012 if (ret)
11013 {
11014 struct ppc_elf_link_hash_table *htab
11015 = (struct ppc_elf_link_hash_table *)ret;
11016 htab->is_vxworks = 1;
11017 htab->plt_type = PLT_VXWORKS;
11018 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11019 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11020 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11021 }
11022 return ret;
11023 }
11024
11025 /* Tweak magic VxWorks symbols as they are loaded. */
11026 static bfd_boolean
11027 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11028 struct bfd_link_info *info,
11029 Elf_Internal_Sym *sym,
11030 const char **namep,
11031 flagword *flagsp,
11032 asection **secp,
11033 bfd_vma *valp)
11034 {
11035 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11036 valp))
11037 return FALSE;
11038
11039 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11040 }
11041
11042 static void
11043 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11044 {
11045 ppc_elf_final_write_processing (abfd, linker);
11046 elf_vxworks_final_write_processing (abfd, linker);
11047 }
11048
11049 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11050 define it. */
11051 #undef elf_backend_want_plt_sym
11052 #define elf_backend_want_plt_sym 1
11053 #undef elf_backend_want_got_plt
11054 #define elf_backend_want_got_plt 1
11055 #undef elf_backend_got_symbol_offset
11056 #define elf_backend_got_symbol_offset 0
11057 #undef elf_backend_plt_not_loaded
11058 #define elf_backend_plt_not_loaded 0
11059 #undef elf_backend_plt_readonly
11060 #define elf_backend_plt_readonly 1
11061 #undef elf_backend_got_header_size
11062 #define elf_backend_got_header_size 12
11063 #undef elf_backend_dtrel_excludes_plt
11064 #define elf_backend_dtrel_excludes_plt 1
11065
11066 #undef bfd_elf32_get_synthetic_symtab
11067
11068 #undef bfd_elf32_bfd_link_hash_table_create
11069 #define bfd_elf32_bfd_link_hash_table_create \
11070 ppc_elf_vxworks_link_hash_table_create
11071 #undef elf_backend_add_symbol_hook
11072 #define elf_backend_add_symbol_hook \
11073 ppc_elf_vxworks_add_symbol_hook
11074 #undef elf_backend_link_output_symbol_hook
11075 #define elf_backend_link_output_symbol_hook \
11076 elf_vxworks_link_output_symbol_hook
11077 #undef elf_backend_final_write_processing
11078 #define elf_backend_final_write_processing \
11079 ppc_elf_vxworks_final_write_processing
11080 #undef elf_backend_get_sec_type_attr
11081 #define elf_backend_get_sec_type_attr \
11082 ppc_elf_vxworks_get_sec_type_attr
11083 #undef elf_backend_emit_relocs
11084 #define elf_backend_emit_relocs \
11085 elf_vxworks_emit_relocs
11086
11087 #undef elf32_bed
11088 #define elf32_bed ppc_elf_vxworks_bed
11089 #undef elf_backend_post_process_headers
11090
11091 #include "elf32-target.h"
GDB Binutils - Deliverables
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