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PR ld/20828: Reorder the symbol sweep stage of section GC
[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 0x1f007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable hierarchy. */
1750 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTINHERIT", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable member usage. */
1765 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTENTRY", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Phony reloc to handle AIX style TOC entries. */
1780 HOWTO (R_PPC_TOC16, /* type */
1781 0, /* rightshift */
1782 1, /* size (0 = byte, 1 = short, 2 = long) */
1783 16, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_signed, /* complain_on_overflow */
1787 ppc_elf_unhandled_reloc, /* special_function */
1788 "R_PPC_TOC16", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0xffff, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793 };
1794
1795 /* External 32-bit PPC structure for PRPSINFO. This structure is
1796 ABI-defined, thus we choose to use char arrays here in order to
1797 avoid dealing with different types in different architectures.
1798
1799 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1800 most non-PPC architectures use `short int'.
1801
1802 This structure will ultimately be written in the corefile's note
1803 section, as the PRPSINFO. */
1804
1805 struct elf_external_ppc_linux_prpsinfo32
1806 {
1807 char pr_state; /* Numeric process state. */
1808 char pr_sname; /* Char for pr_state. */
1809 char pr_zomb; /* Zombie. */
1810 char pr_nice; /* Nice val. */
1811 char pr_flag[4]; /* Flags. */
1812 char pr_uid[4];
1813 char pr_gid[4];
1814 char pr_pid[4];
1815 char pr_ppid[4];
1816 char pr_pgrp[4];
1817 char pr_sid[4];
1818 char pr_fname[16]; /* Filename of executable. */
1819 char pr_psargs[80]; /* Initial part of arg list. */
1820 };
1821
1822 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1823 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1824
1825 static inline void
1826 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1827 const struct elf_internal_linux_prpsinfo *from,
1828 struct elf_external_ppc_linux_prpsinfo32 *to)
1829 {
1830 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1831 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1832 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1833 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1834 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1835 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1836 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1837 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1838 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1839 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1840 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1841 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1842 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1843 }
1844 \f
1845 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1846
1847 static void
1848 ppc_elf_howto_init (void)
1849 {
1850 unsigned int i, type;
1851
1852 for (i = 0;
1853 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1854 i++)
1855 {
1856 type = ppc_elf_howto_raw[i].type;
1857 if (type >= (sizeof (ppc_elf_howto_table)
1858 / sizeof (ppc_elf_howto_table[0])))
1859 abort ();
1860 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1861 }
1862 }
1863
1864 static reloc_howto_type *
1865 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1866 bfd_reloc_code_real_type code)
1867 {
1868 enum elf_ppc_reloc_type r;
1869
1870 /* Initialize howto table if not already done. */
1871 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1872 ppc_elf_howto_init ();
1873
1874 switch (code)
1875 {
1876 default:
1877 return NULL;
1878
1879 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1880 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1881 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1882 case BFD_RELOC_PPC64_ADDR16_DS:
1883 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1884 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1885 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1886 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1887 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1888 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1889 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1890 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1891 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1892 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1893 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1894 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1895 case BFD_RELOC_PPC64_GOT16_DS:
1896 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1897 case BFD_RELOC_PPC64_GOT16_LO_DS:
1898 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1899 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1900 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1901 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1902 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1903 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1904 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1905 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1906 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1907 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1908 case BFD_RELOC_PPC64_PLT16_LO_DS:
1909 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1910 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1911 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1912 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1913 case BFD_RELOC_PPC64_SECTOFF_DS:
1914 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1915 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1916 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1917 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1918 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1919 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1920 case BFD_RELOC_PPC64_TOC16_DS:
1921 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1922 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1923 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1924 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1925 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1926 case BFD_RELOC_PPC64_TPREL16_DS:
1927 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1928 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1929 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1933 case BFD_RELOC_PPC64_DTPREL16_DS:
1934 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1935 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1936 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1937 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1938 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1939 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1943 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1947 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1951 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1955 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1956 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1960 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1961 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1963 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1964 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1965 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1966 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1967 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1969 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1970 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1971 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1972 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1973 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1974 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1975 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1976 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1977 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1978 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1979 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1980 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1981 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1982 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1983 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1984 r = R_PPC_VLE_SDAREL_LO16A;
1985 break;
1986 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1987 r = R_PPC_VLE_SDAREL_LO16D;
1988 break;
1989 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1990 r = R_PPC_VLE_SDAREL_HI16A;
1991 break;
1992 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1993 r = R_PPC_VLE_SDAREL_HI16D;
1994 break;
1995 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1996 r = R_PPC_VLE_SDAREL_HA16A;
1997 break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1999 r = R_PPC_VLE_SDAREL_HA16D;
2000 break;
2001 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2002 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2003 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2004 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2005 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2006 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2007 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2008 }
2009
2010 return ppc_elf_howto_table[r];
2011 };
2012
2013 static reloc_howto_type *
2014 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2015 const char *r_name)
2016 {
2017 unsigned int i;
2018
2019 for (i = 0;
2020 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2021 i++)
2022 if (ppc_elf_howto_raw[i].name != NULL
2023 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2024 return &ppc_elf_howto_raw[i];
2025
2026 return NULL;
2027 }
2028
2029 /* Set the howto pointer for a PowerPC ELF reloc. */
2030
2031 static void
2032 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2033 arelent *cache_ptr,
2034 Elf_Internal_Rela *dst)
2035 {
2036 unsigned int r_type;
2037
2038 /* Initialize howto table if not already done. */
2039 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2040 ppc_elf_howto_init ();
2041
2042 r_type = ELF32_R_TYPE (dst->r_info);
2043 if (r_type >= R_PPC_max)
2044 {
2045 /* xgettext:c-format */
2046 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2047 abfd, r_type);
2048 bfd_set_error (bfd_error_bad_value);
2049 r_type = R_PPC_NONE;
2050 }
2051 cache_ptr->howto = ppc_elf_howto_table[r_type];
2052
2053 /* Just because the above assert didn't trigger doesn't mean that
2054 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2055 if (!cache_ptr->howto)
2056 {
2057 /* xgettext:c-format */
2058 _bfd_error_handler (_("%B: invalid relocation type %d"),
2059 abfd, r_type);
2060 bfd_set_error (bfd_error_bad_value);
2061
2062 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2063 }
2064 }
2065
2066 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2067
2068 static bfd_reloc_status_type
2069 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2070 arelent *reloc_entry,
2071 asymbol *symbol,
2072 void *data ATTRIBUTE_UNUSED,
2073 asection *input_section,
2074 bfd *output_bfd,
2075 char **error_message ATTRIBUTE_UNUSED)
2076 {
2077 enum elf_ppc_reloc_type r_type;
2078 long insn;
2079 bfd_size_type octets;
2080 bfd_vma value;
2081
2082 if (output_bfd != NULL)
2083 {
2084 reloc_entry->address += input_section->output_offset;
2085 return bfd_reloc_ok;
2086 }
2087
2088 reloc_entry->addend += 0x8000;
2089 r_type = reloc_entry->howto->type;
2090 if (r_type != R_PPC_REL16DX_HA)
2091 return bfd_reloc_continue;
2092
2093 value = 0;
2094 if (!bfd_is_com_section (symbol->section))
2095 value = symbol->value;
2096 value += (reloc_entry->addend
2097 + symbol->section->output_offset
2098 + symbol->section->output_section->vma);
2099 value -= (reloc_entry->address
2100 + input_section->output_offset
2101 + input_section->output_section->vma);
2102 value >>= 16;
2103
2104 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2105 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2106 insn &= ~0x1fffc1;
2107 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2108 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2109 return bfd_reloc_ok;
2110 }
2111
2112 static bfd_reloc_status_type
2113 ppc_elf_unhandled_reloc (bfd *abfd,
2114 arelent *reloc_entry,
2115 asymbol *symbol,
2116 void *data,
2117 asection *input_section,
2118 bfd *output_bfd,
2119 char **error_message)
2120 {
2121 /* If this is a relocatable link (output_bfd test tells us), just
2122 call the generic function. Any adjustment will be done at final
2123 link time. */
2124 if (output_bfd != NULL)
2125 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2126 input_section, output_bfd, error_message);
2127
2128 if (error_message != NULL)
2129 {
2130 static char buf[60];
2131 sprintf (buf, _("generic linker can't handle %s"),
2132 reloc_entry->howto->name);
2133 *error_message = buf;
2134 }
2135 return bfd_reloc_dangerous;
2136 }
2137 \f
2138 /* Sections created by the linker. */
2139
2140 typedef struct elf_linker_section
2141 {
2142 /* Pointer to the bfd section. */
2143 asection *section;
2144 /* Section name. */
2145 const char *name;
2146 /* Associated bss section name. */
2147 const char *bss_name;
2148 /* Associated symbol name. */
2149 const char *sym_name;
2150 /* Associated symbol. */
2151 struct elf_link_hash_entry *sym;
2152 } elf_linker_section_t;
2153
2154 /* Linked list of allocated pointer entries. This hangs off of the
2155 symbol lists, and provides allows us to return different pointers,
2156 based on different addend's. */
2157
2158 typedef struct elf_linker_section_pointers
2159 {
2160 /* next allocated pointer for this symbol */
2161 struct elf_linker_section_pointers *next;
2162 /* offset of pointer from beginning of section */
2163 bfd_vma offset;
2164 /* addend used */
2165 bfd_vma addend;
2166 /* which linker section this is */
2167 elf_linker_section_t *lsect;
2168 } elf_linker_section_pointers_t;
2169
2170 struct ppc_elf_obj_tdata
2171 {
2172 struct elf_obj_tdata elf;
2173
2174 /* A mapping from local symbols to offsets into the various linker
2175 sections added. This is index by the symbol index. */
2176 elf_linker_section_pointers_t **linker_section_pointers;
2177
2178 /* Flags used to auto-detect plt type. */
2179 unsigned int makes_plt_call : 1;
2180 unsigned int has_rel16 : 1;
2181 };
2182
2183 #define ppc_elf_tdata(bfd) \
2184 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2185
2186 #define elf_local_ptr_offsets(bfd) \
2187 (ppc_elf_tdata (bfd)->linker_section_pointers)
2188
2189 #define is_ppc_elf(bfd) \
2190 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2191 && elf_object_id (bfd) == PPC32_ELF_DATA)
2192
2193 /* Override the generic function because we store some extras. */
2194
2195 static bfd_boolean
2196 ppc_elf_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2199 PPC32_ELF_DATA);
2200 }
2201
2202 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2203
2204 bfd_boolean
2205 _bfd_elf_ppc_set_arch (bfd *abfd)
2206 {
2207 unsigned long mach = 0;
2208 asection *s;
2209 unsigned char *contents;
2210
2211 if (abfd->arch_info->bits_per_word == 32
2212 && bfd_big_endian (abfd))
2213 {
2214
2215 for (s = abfd->sections; s != NULL; s = s->next)
2216 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2217 break;
2218 if (s != NULL)
2219 mach = bfd_mach_ppc_vle;
2220 }
2221
2222 if (mach == 0)
2223 {
2224 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2225 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2226 {
2227 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2228 unsigned int i;
2229
2230 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2231 {
2232 unsigned int val = bfd_get_32 (abfd, contents + i);
2233 switch (val >> 16)
2234 {
2235 case PPC_APUINFO_PMR:
2236 case PPC_APUINFO_RFMCI:
2237 if (mach == 0)
2238 mach = bfd_mach_ppc_titan;
2239 break;
2240
2241 case PPC_APUINFO_ISEL:
2242 case PPC_APUINFO_CACHELCK:
2243 if (mach == bfd_mach_ppc_titan)
2244 mach = bfd_mach_ppc_e500mc;
2245 break;
2246
2247 case PPC_APUINFO_SPE:
2248 case PPC_APUINFO_EFS:
2249 case PPC_APUINFO_BRLOCK:
2250 if (mach != bfd_mach_ppc_vle)
2251 mach = bfd_mach_ppc_e500;
2252 break;
2253
2254 case PPC_APUINFO_VLE:
2255 mach = bfd_mach_ppc_vle;
2256 break;
2257
2258 default:
2259 mach = -1ul;
2260 }
2261 }
2262 free (contents);
2263 }
2264 }
2265
2266 if (mach != 0 && mach != -1ul)
2267 {
2268 const bfd_arch_info_type *arch;
2269
2270 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2271 if (arch->mach == mach)
2272 {
2273 abfd->arch_info = arch;
2274 break;
2275 }
2276 }
2277 return TRUE;
2278 }
2279
2280 /* Fix bad default arch selected for a 32 bit input bfd when the
2281 default is 64 bit. Also select arch based on apuinfo. */
2282
2283 static bfd_boolean
2284 ppc_elf_object_p (bfd *abfd)
2285 {
2286 if (!abfd->arch_info->the_default)
2287 return TRUE;
2288
2289 if (abfd->arch_info->bits_per_word == 64)
2290 {
2291 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2292
2293 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2294 {
2295 /* Relies on arch after 64 bit default being 32 bit default. */
2296 abfd->arch_info = abfd->arch_info->next;
2297 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2298 }
2299 }
2300 return _bfd_elf_ppc_set_arch (abfd);
2301 }
2302
2303 /* Function to set whether a module needs the -mrelocatable bit set. */
2304
2305 static bfd_boolean
2306 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2307 {
2308 BFD_ASSERT (!elf_flags_init (abfd)
2309 || elf_elfheader (abfd)->e_flags == flags);
2310
2311 elf_elfheader (abfd)->e_flags = flags;
2312 elf_flags_init (abfd) = TRUE;
2313 return TRUE;
2314 }
2315
2316 /* Support for core dump NOTE sections. */
2317
2318 static bfd_boolean
2319 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2320 {
2321 int offset;
2322 unsigned int size;
2323
2324 switch (note->descsz)
2325 {
2326 default:
2327 return FALSE;
2328
2329 case 268: /* Linux/PPC. */
2330 /* pr_cursig */
2331 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2332
2333 /* pr_pid */
2334 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2335
2336 /* pr_reg */
2337 offset = 72;
2338 size = 192;
2339
2340 break;
2341 }
2342
2343 /* Make a ".reg/999" section. */
2344 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2345 size, note->descpos + offset);
2346 }
2347
2348 static bfd_boolean
2349 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2350 {
2351 switch (note->descsz)
2352 {
2353 default:
2354 return FALSE;
2355
2356 case 128: /* Linux/PPC elf_prpsinfo. */
2357 elf_tdata (abfd)->core->pid
2358 = bfd_get_32 (abfd, note->descdata + 16);
2359 elf_tdata (abfd)->core->program
2360 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2361 elf_tdata (abfd)->core->command
2362 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2363 }
2364
2365 /* Note that for some reason, a spurious space is tacked
2366 onto the end of the args in some (at least one anyway)
2367 implementations, so strip it off if it exists. */
2368
2369 {
2370 char *command = elf_tdata (abfd)->core->command;
2371 int n = strlen (command);
2372
2373 if (0 < n && command[n - 1] == ' ')
2374 command[n - 1] = '\0';
2375 }
2376
2377 return TRUE;
2378 }
2379
2380 char *
2381 elfcore_write_ppc_linux_prpsinfo32
2382 (bfd *abfd,
2383 char *buf,
2384 int *bufsiz,
2385 const struct elf_internal_linux_prpsinfo *prpsinfo)
2386 {
2387 struct elf_external_ppc_linux_prpsinfo32 data;
2388
2389 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2390 return elfcore_write_note (abfd, buf, bufsiz,
2391 "CORE", NT_PRPSINFO, &data, sizeof (data));
2392 }
2393
2394 static char *
2395 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2396 {
2397 switch (note_type)
2398 {
2399 default:
2400 return NULL;
2401
2402 case NT_PRPSINFO:
2403 {
2404 char data[128];
2405 va_list ap;
2406
2407 va_start (ap, note_type);
2408 memset (data, 0, sizeof (data));
2409 strncpy (data + 32, va_arg (ap, const char *), 16);
2410 strncpy (data + 48, va_arg (ap, const char *), 80);
2411 va_end (ap);
2412 return elfcore_write_note (abfd, buf, bufsiz,
2413 "CORE", note_type, data, sizeof (data));
2414 }
2415
2416 case NT_PRSTATUS:
2417 {
2418 char data[268];
2419 va_list ap;
2420 long pid;
2421 int cursig;
2422 const void *greg;
2423
2424 va_start (ap, note_type);
2425 memset (data, 0, 72);
2426 pid = va_arg (ap, long);
2427 bfd_put_32 (abfd, pid, data + 24);
2428 cursig = va_arg (ap, int);
2429 bfd_put_16 (abfd, cursig, data + 12);
2430 greg = va_arg (ap, const void *);
2431 memcpy (data + 72, greg, 192);
2432 memset (data + 264, 0, 4);
2433 va_end (ap);
2434 return elfcore_write_note (abfd, buf, bufsiz,
2435 "CORE", note_type, data, sizeof (data));
2436 }
2437 }
2438 }
2439
2440 static flagword
2441 ppc_elf_lookup_section_flags (char *flag_name)
2442 {
2443
2444 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2445 return SHF_PPC_VLE;
2446
2447 return 0;
2448 }
2449
2450 /* Return address for Ith PLT stub in section PLT, for relocation REL
2451 or (bfd_vma) -1 if it should not be included. */
2452
2453 static bfd_vma
2454 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2455 const asection *plt ATTRIBUTE_UNUSED,
2456 const arelent *rel)
2457 {
2458 return rel->address;
2459 }
2460
2461 /* Handle a PowerPC specific section when reading an object file. This
2462 is called when bfd_section_from_shdr finds a section with an unknown
2463 type. */
2464
2465 static bfd_boolean
2466 ppc_elf_section_from_shdr (bfd *abfd,
2467 Elf_Internal_Shdr *hdr,
2468 const char *name,
2469 int shindex)
2470 {
2471 asection *newsect;
2472 flagword flags;
2473
2474 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2475 return FALSE;
2476
2477 newsect = hdr->bfd_section;
2478 flags = bfd_get_section_flags (abfd, newsect);
2479 if (hdr->sh_flags & SHF_EXCLUDE)
2480 flags |= SEC_EXCLUDE;
2481
2482 if (hdr->sh_type == SHT_ORDERED)
2483 flags |= SEC_SORT_ENTRIES;
2484
2485 bfd_set_section_flags (abfd, newsect, flags);
2486 return TRUE;
2487 }
2488
2489 /* Set up any other section flags and such that may be necessary. */
2490
2491 static bfd_boolean
2492 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2493 Elf_Internal_Shdr *shdr,
2494 asection *asect)
2495 {
2496 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2497 shdr->sh_type = SHT_ORDERED;
2498
2499 return TRUE;
2500 }
2501
2502 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2503 need to bump up the number of section headers. */
2504
2505 static int
2506 ppc_elf_additional_program_headers (bfd *abfd,
2507 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2508 {
2509 asection *s;
2510 int ret = 0;
2511
2512 s = bfd_get_section_by_name (abfd, ".sbss2");
2513 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2514 ++ret;
2515
2516 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2517 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2518 ++ret;
2519
2520 return ret;
2521 }
2522
2523 /* Modify the segment map for VLE executables. */
2524
2525 bfd_boolean
2526 ppc_elf_modify_segment_map (bfd *abfd,
2527 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2528 {
2529 struct elf_segment_map *m;
2530
2531 /* At this point in the link, output sections have already been sorted by
2532 LMA and assigned to segments. All that is left to do is to ensure
2533 there is no mixing of VLE & non-VLE sections in a text segment.
2534 If we find that case, we split the segment.
2535 We maintain the original output section order. */
2536
2537 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2538 {
2539 struct elf_segment_map *n;
2540 bfd_size_type amt;
2541 unsigned int j, k;
2542 unsigned int p_flags;
2543
2544 if (m->p_type != PT_LOAD || m->count == 0)
2545 continue;
2546
2547 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2548 {
2549 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2550 p_flags |= PF_W;
2551 if ((m->sections[j]->flags & SEC_CODE) != 0)
2552 {
2553 p_flags |= PF_X;
2554 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2555 p_flags |= PF_PPC_VLE;
2556 break;
2557 }
2558 }
2559 if (j != m->count)
2560 while (++j != m->count)
2561 {
2562 unsigned int p_flags1 = PF_R;
2563
2564 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2565 p_flags1 |= PF_W;
2566 if ((m->sections[j]->flags & SEC_CODE) != 0)
2567 {
2568 p_flags1 |= PF_X;
2569 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2570 p_flags1 |= PF_PPC_VLE;
2571 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2572 break;
2573 }
2574 p_flags |= p_flags1;
2575 }
2576 /* If we're splitting a segment which originally contained rw
2577 sections then those sections might now only be in one of the
2578 two parts. So always set p_flags if splitting, even if we
2579 are being called for objcopy with p_flags_valid set. */
2580 if (j != m->count || !m->p_flags_valid)
2581 {
2582 m->p_flags_valid = 1;
2583 m->p_flags = p_flags;
2584 }
2585 if (j == m->count)
2586 continue;
2587
2588 /* Sections 0..j-1 stay in this (current) segment,
2589 the remainder are put in a new segment.
2590 The scan resumes with the new segment. */
2591
2592 amt = sizeof (struct elf_segment_map);
2593 amt += (m->count - j - 1) * sizeof (asection *);
2594 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2595 if (n == NULL)
2596 return FALSE;
2597
2598 n->p_type = PT_LOAD;
2599 n->count = m->count - j;
2600 for (k = 0; k < n->count; ++k)
2601 n->sections[k] = m->sections[j + k];
2602 m->count = j;
2603 m->p_size_valid = 0;
2604 n->next = m->next;
2605 m->next = n;
2606 }
2607
2608 return TRUE;
2609 }
2610
2611 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2612 .PPC.EMB.sbss0 a normal section, and not a bss section so
2613 that the linker doesn't crater when trying to make more than
2614 2 sections. */
2615
2616 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2617 {
2618 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2619 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2620 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2621 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2623 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2624 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2625 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2628 };
2629
2630 /* This is what we want for new plt/got. */
2631 static struct bfd_elf_special_section ppc_alt_plt =
2632 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2633
2634 static const struct bfd_elf_special_section *
2635 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2636 {
2637 const struct bfd_elf_special_section *ssect;
2638
2639 /* See if this is one of the special sections. */
2640 if (sec->name == NULL)
2641 return NULL;
2642
2643 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2644 sec->use_rela_p);
2645 if (ssect != NULL)
2646 {
2647 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2648 ssect = &ppc_alt_plt;
2649 return ssect;
2650 }
2651
2652 return _bfd_elf_get_sec_type_attr (abfd, sec);
2653 }
2654 \f
2655 /* Very simple linked list structure for recording apuinfo values. */
2656 typedef struct apuinfo_list
2657 {
2658 struct apuinfo_list *next;
2659 unsigned long value;
2660 }
2661 apuinfo_list;
2662
2663 static apuinfo_list *head;
2664 static bfd_boolean apuinfo_set;
2665
2666 static void
2667 apuinfo_list_init (void)
2668 {
2669 head = NULL;
2670 apuinfo_set = FALSE;
2671 }
2672
2673 static void
2674 apuinfo_list_add (unsigned long value)
2675 {
2676 apuinfo_list *entry = head;
2677
2678 while (entry != NULL)
2679 {
2680 if (entry->value == value)
2681 return;
2682 entry = entry->next;
2683 }
2684
2685 entry = bfd_malloc (sizeof (* entry));
2686 if (entry == NULL)
2687 return;
2688
2689 entry->value = value;
2690 entry->next = head;
2691 head = entry;
2692 }
2693
2694 static unsigned
2695 apuinfo_list_length (void)
2696 {
2697 apuinfo_list *entry;
2698 unsigned long count;
2699
2700 for (entry = head, count = 0;
2701 entry;
2702 entry = entry->next)
2703 ++ count;
2704
2705 return count;
2706 }
2707
2708 static inline unsigned long
2709 apuinfo_list_element (unsigned long number)
2710 {
2711 apuinfo_list * entry;
2712
2713 for (entry = head;
2714 entry && number --;
2715 entry = entry->next)
2716 ;
2717
2718 return entry ? entry->value : 0;
2719 }
2720
2721 static void
2722 apuinfo_list_finish (void)
2723 {
2724 apuinfo_list *entry;
2725
2726 for (entry = head; entry;)
2727 {
2728 apuinfo_list *next = entry->next;
2729 free (entry);
2730 entry = next;
2731 }
2732
2733 head = NULL;
2734 }
2735
2736 /* Scan the input BFDs and create a linked list of
2737 the APUinfo values that will need to be emitted. */
2738
2739 static void
2740 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2741 {
2742 bfd *ibfd;
2743 asection *asec;
2744 char *buffer = NULL;
2745 bfd_size_type largest_input_size = 0;
2746 unsigned i;
2747 unsigned long length;
2748 const char *error_message = NULL;
2749
2750 if (link_info == NULL)
2751 return;
2752
2753 apuinfo_list_init ();
2754
2755 /* Read in the input sections contents. */
2756 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2757 {
2758 unsigned long datum;
2759
2760 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2761 if (asec == NULL)
2762 continue;
2763
2764 /* xgettext:c-format */
2765 error_message = _("corrupt %s section in %B");
2766 length = asec->size;
2767 if (length < 20)
2768 goto fail;
2769
2770 apuinfo_set = TRUE;
2771 if (largest_input_size < asec->size)
2772 {
2773 if (buffer)
2774 free (buffer);
2775 largest_input_size = asec->size;
2776 buffer = bfd_malloc (largest_input_size);
2777 if (!buffer)
2778 return;
2779 }
2780
2781 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2782 || (bfd_bread (buffer, length, ibfd) != length))
2783 {
2784 /* xgettext:c-format */
2785 error_message = _("unable to read in %s section from %B");
2786 goto fail;
2787 }
2788
2789 /* Verify the contents of the header. Note - we have to
2790 extract the values this way in order to allow for a
2791 host whose endian-ness is different from the target. */
2792 datum = bfd_get_32 (ibfd, buffer);
2793 if (datum != sizeof APUINFO_LABEL)
2794 goto fail;
2795
2796 datum = bfd_get_32 (ibfd, buffer + 8);
2797 if (datum != 0x2)
2798 goto fail;
2799
2800 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2801 goto fail;
2802
2803 /* Get the number of bytes used for apuinfo entries. */
2804 datum = bfd_get_32 (ibfd, buffer + 4);
2805 if (datum + 20 != length)
2806 goto fail;
2807
2808 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2809 for (i = 0; i < datum; i += 4)
2810 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2811 }
2812
2813 error_message = NULL;
2814
2815 if (apuinfo_set)
2816 {
2817 /* Compute the size of the output section. */
2818 unsigned num_entries = apuinfo_list_length ();
2819
2820 /* Set the output section size, if it exists. */
2821 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2822
2823 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2824 {
2825 ibfd = abfd;
2826 /* xgettext:c-format */
2827 error_message = _("warning: unable to set size of %s section in %B");
2828 }
2829 }
2830
2831 fail:
2832 if (buffer)
2833 free (buffer);
2834
2835 if (error_message)
2836 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2837 }
2838
2839 /* Prevent the output section from accumulating the input sections'
2840 contents. We have already stored this in our linked list structure. */
2841
2842 static bfd_boolean
2843 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2844 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2845 asection *asec,
2846 bfd_byte *contents ATTRIBUTE_UNUSED)
2847 {
2848 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2849 }
2850
2851 /* Finally we can generate the output section. */
2852
2853 static void
2854 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2855 {
2856 bfd_byte *buffer;
2857 asection *asec;
2858 unsigned i;
2859 unsigned num_entries;
2860 bfd_size_type length;
2861
2862 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2863 if (asec == NULL)
2864 return;
2865
2866 if (!apuinfo_set)
2867 return;
2868
2869 length = asec->size;
2870 if (length < 20)
2871 return;
2872
2873 buffer = bfd_malloc (length);
2874 if (buffer == NULL)
2875 {
2876 _bfd_error_handler
2877 (_("failed to allocate space for new APUinfo section."));
2878 return;
2879 }
2880
2881 /* Create the apuinfo header. */
2882 num_entries = apuinfo_list_length ();
2883 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2884 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2885 bfd_put_32 (abfd, 0x2, buffer + 8);
2886 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2887
2888 length = 20;
2889 for (i = 0; i < num_entries; i++)
2890 {
2891 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2892 length += 4;
2893 }
2894
2895 if (length != asec->size)
2896 _bfd_error_handler (_("failed to compute new APUinfo section."));
2897
2898 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2899 _bfd_error_handler (_("failed to install new APUinfo section."));
2900
2901 free (buffer);
2902
2903 apuinfo_list_finish ();
2904 }
2905 \f
2906 static bfd_boolean
2907 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2908 {
2909 bfd_byte buf[GLINK_ENTRY_SIZE];
2910
2911 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2912 return FALSE;
2913
2914 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2915 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2916 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2917 && bfd_get_32 (abfd, buf + 12) == BCTR);
2918 }
2919
2920 static bfd_boolean
2921 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2922 {
2923 bfd_vma vma = *(bfd_vma *) ptr;
2924 return ((section->flags & SEC_ALLOC) != 0
2925 && section->vma <= vma
2926 && vma < section->vma + section->size);
2927 }
2928
2929 static long
2930 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2931 long dynsymcount, asymbol **dynsyms,
2932 asymbol **ret)
2933 {
2934 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2935 asection *plt, *relplt, *dynamic, *glink;
2936 bfd_vma glink_vma = 0;
2937 bfd_vma resolv_vma = 0;
2938 bfd_vma stub_vma;
2939 asymbol *s;
2940 arelent *p;
2941 long count, i;
2942 size_t size;
2943 char *names;
2944 bfd_byte buf[4];
2945
2946 *ret = NULL;
2947
2948 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2949 return 0;
2950
2951 if (dynsymcount <= 0)
2952 return 0;
2953
2954 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2955 if (relplt == NULL)
2956 return 0;
2957
2958 plt = bfd_get_section_by_name (abfd, ".plt");
2959 if (plt == NULL)
2960 return 0;
2961
2962 /* Call common code to handle old-style executable PLTs. */
2963 if (elf_section_flags (plt) & SHF_EXECINSTR)
2964 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2965 dynsymcount, dynsyms, ret);
2966
2967 /* If this object was prelinked, the prelinker stored the address
2968 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2969 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2970 if (dynamic != NULL)
2971 {
2972 bfd_byte *dynbuf, *extdyn, *extdynend;
2973 size_t extdynsize;
2974 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2975
2976 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2977 return -1;
2978
2979 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2980 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2981
2982 extdyn = dynbuf;
2983 extdynend = extdyn + dynamic->size;
2984 for (; extdyn < extdynend; extdyn += extdynsize)
2985 {
2986 Elf_Internal_Dyn dyn;
2987 (*swap_dyn_in) (abfd, extdyn, &dyn);
2988
2989 if (dyn.d_tag == DT_NULL)
2990 break;
2991
2992 if (dyn.d_tag == DT_PPC_GOT)
2993 {
2994 unsigned int g_o_t = dyn.d_un.d_val;
2995 asection *got = bfd_get_section_by_name (abfd, ".got");
2996 if (got != NULL
2997 && bfd_get_section_contents (abfd, got, buf,
2998 g_o_t - got->vma + 4, 4))
2999 glink_vma = bfd_get_32 (abfd, buf);
3000 break;
3001 }
3002 }
3003 free (dynbuf);
3004 }
3005
3006 /* Otherwise we read the first plt entry. */
3007 if (glink_vma == 0)
3008 {
3009 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3010 glink_vma = bfd_get_32 (abfd, buf);
3011 }
3012
3013 if (glink_vma == 0)
3014 return 0;
3015
3016 /* The .glink section usually does not survive the final
3017 link; search for the section (usually .text) where the
3018 glink stubs now reside. */
3019 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3020 if (glink == NULL)
3021 return 0;
3022
3023 /* Determine glink PLT resolver by reading the relative branch
3024 from the first glink stub. */
3025 if (bfd_get_section_contents (abfd, glink, buf,
3026 glink_vma - glink->vma, 4))
3027 {
3028 unsigned int insn = bfd_get_32 (abfd, buf);
3029
3030 /* The first glink stub may either branch to the resolver ... */
3031 insn ^= B;
3032 if ((insn & ~0x3fffffc) == 0)
3033 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3034
3035 /* ... or fall through a bunch of NOPs. */
3036 else if ((insn ^ B ^ NOP) == 0)
3037 for (i = 4;
3038 bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma + i, 4);
3040 i += 4)
3041 if (bfd_get_32 (abfd, buf) != NOP)
3042 {
3043 resolv_vma = glink_vma + i;
3044 break;
3045 }
3046 }
3047
3048 count = relplt->size / sizeof (Elf32_External_Rela);
3049 /* If the stubs are those for -shared/-pie then we might have
3050 multiple stubs for each plt entry. If that is the case then
3051 there is no way to associate stubs with their plt entries short
3052 of figuring out the GOT pointer value used in the stub. */
3053 if (!is_nonpic_glink_stub (abfd, glink,
3054 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3055 return 0;
3056
3057 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3058 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3059 return -1;
3060
3061 size = count * sizeof (asymbol);
3062 p = relplt->relocation;
3063 for (i = 0; i < count; i++, p++)
3064 {
3065 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3066 if (p->addend != 0)
3067 size += sizeof ("+0x") - 1 + 8;
3068 }
3069
3070 size += sizeof (asymbol) + sizeof ("__glink");
3071
3072 if (resolv_vma)
3073 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3074
3075 s = *ret = bfd_malloc (size);
3076 if (s == NULL)
3077 return -1;
3078
3079 stub_vma = glink_vma;
3080 names = (char *) (s + count + 1 + (resolv_vma != 0));
3081 p = relplt->relocation + count - 1;
3082 for (i = 0; i < count; i++)
3083 {
3084 size_t len;
3085
3086 *s = **p->sym_ptr_ptr;
3087 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3088 we are defining a symbol, ensure one of them is set. */
3089 if ((s->flags & BSF_LOCAL) == 0)
3090 s->flags |= BSF_GLOBAL;
3091 s->flags |= BSF_SYNTHETIC;
3092 s->section = glink;
3093 stub_vma -= 16;
3094 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3095 stub_vma -= 32;
3096 s->value = stub_vma - glink->vma;
3097 s->name = names;
3098 s->udata.p = NULL;
3099 len = strlen ((*p->sym_ptr_ptr)->name);
3100 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3101 names += len;
3102 if (p->addend != 0)
3103 {
3104 memcpy (names, "+0x", sizeof ("+0x") - 1);
3105 names += sizeof ("+0x") - 1;
3106 bfd_sprintf_vma (abfd, names, p->addend);
3107 names += strlen (names);
3108 }
3109 memcpy (names, "@plt", sizeof ("@plt"));
3110 names += sizeof ("@plt");
3111 ++s;
3112 --p;
3113 }
3114
3115 /* Add a symbol at the start of the glink branch table. */
3116 memset (s, 0, sizeof *s);
3117 s->the_bfd = abfd;
3118 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3119 s->section = glink;
3120 s->value = glink_vma - glink->vma;
3121 s->name = names;
3122 memcpy (names, "__glink", sizeof ("__glink"));
3123 names += sizeof ("__glink");
3124 s++;
3125 count++;
3126
3127 if (resolv_vma)
3128 {
3129 /* Add a symbol for the glink PLT resolver. */
3130 memset (s, 0, sizeof *s);
3131 s->the_bfd = abfd;
3132 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3133 s->section = glink;
3134 s->value = resolv_vma - glink->vma;
3135 s->name = names;
3136 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3137 names += sizeof ("__glink_PLTresolve");
3138 s++;
3139 count++;
3140 }
3141
3142 return count;
3143 }
3144 \f
3145 /* The following functions are specific to the ELF linker, while
3146 functions above are used generally. They appear in this file more
3147 or less in the order in which they are called. eg.
3148 ppc_elf_check_relocs is called early in the link process,
3149 ppc_elf_finish_dynamic_sections is one of the last functions
3150 called. */
3151
3152 /* Track PLT entries needed for a given symbol. We might need more
3153 than one glink entry per symbol when generating a pic binary. */
3154 struct plt_entry
3155 {
3156 struct plt_entry *next;
3157
3158 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3159 This field stores the offset into .got2 used to initialise the
3160 GOT pointer reg. It will always be at least 32768. (Current
3161 gcc always uses an offset of 32768, but ld -r will pack .got2
3162 sections together resulting in larger offsets). */
3163 bfd_vma addend;
3164
3165 /* The .got2 section. */
3166 asection *sec;
3167
3168 /* PLT refcount or offset. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } plt;
3174
3175 /* .glink stub offset. */
3176 bfd_vma glink_offset;
3177 };
3178
3179 /* Of those relocs that might be copied as dynamic relocs, this function
3180 selects those that must be copied when linking a shared library,
3181 even when the symbol is local. */
3182
3183 static int
3184 must_be_dyn_reloc (struct bfd_link_info *info,
3185 enum elf_ppc_reloc_type r_type)
3186 {
3187 switch (r_type)
3188 {
3189 default:
3190 return 1;
3191
3192 case R_PPC_REL24:
3193 case R_PPC_REL14:
3194 case R_PPC_REL14_BRTAKEN:
3195 case R_PPC_REL14_BRNTAKEN:
3196 case R_PPC_REL32:
3197 return 0;
3198
3199 case R_PPC_TPREL32:
3200 case R_PPC_TPREL16:
3201 case R_PPC_TPREL16_LO:
3202 case R_PPC_TPREL16_HI:
3203 case R_PPC_TPREL16_HA:
3204 return !bfd_link_executable (info);
3205 }
3206 }
3207
3208 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3209 copying dynamic variables from a shared lib into an app's dynbss
3210 section, and instead use a dynamic relocation to point into the
3211 shared lib. */
3212 #define ELIMINATE_COPY_RELOCS 1
3213
3214 /* Used to track dynamic relocations for local symbols. */
3215 struct ppc_dyn_relocs
3216 {
3217 struct ppc_dyn_relocs *next;
3218
3219 /* The input section of the reloc. */
3220 asection *sec;
3221
3222 /* Total number of relocs copied for the input section. */
3223 unsigned int count : 31;
3224
3225 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3226 unsigned int ifunc : 1;
3227 };
3228
3229 /* PPC ELF linker hash entry. */
3230
3231 struct ppc_elf_link_hash_entry
3232 {
3233 struct elf_link_hash_entry elf;
3234
3235 /* If this symbol is used in the linker created sections, the processor
3236 specific backend uses this field to map the field into the offset
3237 from the beginning of the section. */
3238 elf_linker_section_pointers_t *linker_section_pointer;
3239
3240 /* Track dynamic relocs copied for this symbol. */
3241 struct elf_dyn_relocs *dyn_relocs;
3242
3243 /* Contexts in which symbol is used in the GOT (or TOC).
3244 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3245 corresponding relocs are encountered during check_relocs.
3246 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3247 indicate the corresponding GOT entry type is not needed. */
3248 #define TLS_GD 1 /* GD reloc. */
3249 #define TLS_LD 2 /* LD reloc. */
3250 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3251 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3252 #define TLS_TLS 16 /* Any TLS reloc. */
3253 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3254 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3255 char tls_mask;
3256
3257 /* Nonzero if we have seen a small data relocation referring to this
3258 symbol. */
3259 unsigned char has_sda_refs : 1;
3260
3261 /* Flag use of given relocations. */
3262 unsigned char has_addr16_ha : 1;
3263 unsigned char has_addr16_lo : 1;
3264 };
3265
3266 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3267
3268 /* PPC ELF linker hash table. */
3269
3270 struct ppc_elf_link_hash_table
3271 {
3272 struct elf_link_hash_table elf;
3273
3274 /* Various options passed from the linker. */
3275 struct ppc_elf_params *params;
3276
3277 /* Short-cuts to get to dynamic linker sections. */
3278 asection *glink;
3279 asection *dynsbss;
3280 asection *relsbss;
3281 elf_linker_section_t sdata[2];
3282 asection *sbss;
3283 asection *glink_eh_frame;
3284
3285 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3286 asection *srelplt2;
3287
3288 /* Shortcut to __tls_get_addr. */
3289 struct elf_link_hash_entry *tls_get_addr;
3290
3291 /* The bfd that forced an old-style PLT. */
3292 bfd *old_bfd;
3293
3294 /* TLS local dynamic got entry handling. */
3295 union {
3296 bfd_signed_vma refcount;
3297 bfd_vma offset;
3298 } tlsld_got;
3299
3300 /* Offset of branch table to PltResolve function in glink. */
3301 bfd_vma glink_pltresolve;
3302
3303 /* Size of reserved GOT entries. */
3304 unsigned int got_header_size;
3305 /* Non-zero if allocating the header left a gap. */
3306 unsigned int got_gap;
3307
3308 /* The type of PLT we have chosen to use. */
3309 enum ppc_elf_plt_type plt_type;
3310
3311 /* True if the target system is VxWorks. */
3312 unsigned int is_vxworks:1;
3313
3314 /* The size of PLT entries. */
3315 int plt_entry_size;
3316 /* The distance between adjacent PLT slots. */
3317 int plt_slot_size;
3318 /* The size of the first PLT entry. */
3319 int plt_initial_entry_size;
3320
3321 /* Small local sym cache. */
3322 struct sym_cache sym_cache;
3323 };
3324
3325 /* Rename some of the generic section flags to better document how they
3326 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3327
3328 /* Nonzero if this section has TLS related relocations. */
3329 #define has_tls_reloc sec_flg0
3330
3331 /* Nonzero if this section has a call to __tls_get_addr. */
3332 #define has_tls_get_addr_call sec_flg1
3333
3334 /* Get the PPC ELF linker hash table from a link_info structure. */
3335
3336 #define ppc_elf_hash_table(p) \
3337 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3338 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3339
3340 /* Create an entry in a PPC ELF linker hash table. */
3341
3342 static struct bfd_hash_entry *
3343 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3344 struct bfd_hash_table *table,
3345 const char *string)
3346 {
3347 /* Allocate the structure if it has not already been allocated by a
3348 subclass. */
3349 if (entry == NULL)
3350 {
3351 entry = bfd_hash_allocate (table,
3352 sizeof (struct ppc_elf_link_hash_entry));
3353 if (entry == NULL)
3354 return entry;
3355 }
3356
3357 /* Call the allocation method of the superclass. */
3358 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3359 if (entry != NULL)
3360 {
3361 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3362 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3363 ppc_elf_hash_entry (entry)->tls_mask = 0;
3364 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3365 }
3366
3367 return entry;
3368 }
3369
3370 /* Create a PPC ELF linker hash table. */
3371
3372 static struct bfd_link_hash_table *
3373 ppc_elf_link_hash_table_create (bfd *abfd)
3374 {
3375 struct ppc_elf_link_hash_table *ret;
3376 static struct ppc_elf_params default_params
3377 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3378
3379 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3380 if (ret == NULL)
3381 return NULL;
3382
3383 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3384 ppc_elf_link_hash_newfunc,
3385 sizeof (struct ppc_elf_link_hash_entry),
3386 PPC32_ELF_DATA))
3387 {
3388 free (ret);
3389 return NULL;
3390 }
3391
3392 ret->elf.init_plt_refcount.refcount = 0;
3393 ret->elf.init_plt_refcount.glist = NULL;
3394 ret->elf.init_plt_offset.offset = 0;
3395 ret->elf.init_plt_offset.glist = NULL;
3396
3397 ret->params = &default_params;
3398
3399 ret->sdata[0].name = ".sdata";
3400 ret->sdata[0].sym_name = "_SDA_BASE_";
3401 ret->sdata[0].bss_name = ".sbss";
3402
3403 ret->sdata[1].name = ".sdata2";
3404 ret->sdata[1].sym_name = "_SDA2_BASE_";
3405 ret->sdata[1].bss_name = ".sbss2";
3406
3407 ret->plt_entry_size = 12;
3408 ret->plt_slot_size = 8;
3409 ret->plt_initial_entry_size = 72;
3410
3411 return &ret->elf.root;
3412 }
3413
3414 /* Hook linker params into hash table. */
3415
3416 void
3417 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3418 {
3419 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3420
3421 if (htab)
3422 htab->params = params;
3423 params->pagesize_p2 = bfd_log2 (params->pagesize);
3424 }
3425
3426 /* Create .got and the related sections. */
3427
3428 static bfd_boolean
3429 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432
3433 if (!_bfd_elf_create_got_section (abfd, info))
3434 return FALSE;
3435
3436 htab = ppc_elf_hash_table (info);
3437 if (!htab->is_vxworks)
3438 {
3439 /* The powerpc .got has a blrl instruction in it. Mark it
3440 executable. */
3441 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3442 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3443 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3444 return FALSE;
3445 }
3446
3447 return TRUE;
3448 }
3449
3450 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3451 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3452 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3453
3454 static bfd_boolean
3455 ppc_elf_create_linker_section (bfd *abfd,
3456 struct bfd_link_info *info,
3457 flagword flags,
3458 elf_linker_section_t *lsect)
3459 {
3460 asection *s;
3461
3462 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3463 | SEC_LINKER_CREATED);
3464
3465 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3466 if (s == NULL)
3467 return FALSE;
3468 lsect->section = s;
3469
3470 /* Define the sym on the first section of this name. */
3471 s = bfd_get_section_by_name (abfd, lsect->name);
3472
3473 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3474 if (lsect->sym == NULL)
3475 return FALSE;
3476 lsect->sym->root.u.def.value = 0x8000;
3477 return TRUE;
3478 }
3479
3480 static bfd_boolean
3481 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3482 {
3483 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3484 asection *s;
3485 flagword flags;
3486
3487 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3488 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3489 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3490 htab->glink = s;
3491 if (s == NULL
3492 || !bfd_set_section_alignment (abfd, s,
3493 htab->params->ppc476_workaround ? 6 : 4))
3494 return FALSE;
3495
3496 if (!info->no_ld_generated_unwind_info)
3497 {
3498 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3499 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3500 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3501 htab->glink_eh_frame = s;
3502 if (s == NULL
3503 || !bfd_set_section_alignment (abfd, s, 2))
3504 return FALSE;
3505 }
3506
3507 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3508 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3509 htab->elf.iplt = s;
3510 if (s == NULL
3511 || !bfd_set_section_alignment (abfd, s, 4))
3512 return FALSE;
3513
3514 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3516 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3517 htab->elf.irelplt = s;
3518 if (s == NULL
3519 || ! bfd_set_section_alignment (abfd, s, 2))
3520 return FALSE;
3521
3522 if (!ppc_elf_create_linker_section (abfd, info, 0,
3523 &htab->sdata[0]))
3524 return FALSE;
3525
3526 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3527 &htab->sdata[1]))
3528 return FALSE;
3529
3530 return TRUE;
3531 }
3532
3533 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3534 to output sections (just like _bfd_elf_create_dynamic_sections has
3535 to create .dynbss and .rela.bss). */
3536
3537 static bfd_boolean
3538 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3539 {
3540 struct ppc_elf_link_hash_table *htab;
3541 asection *s;
3542 flagword flags;
3543
3544 htab = ppc_elf_hash_table (info);
3545
3546 if (htab->elf.sgot == NULL
3547 && !ppc_elf_create_got (abfd, info))
3548 return FALSE;
3549
3550 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3551 return FALSE;
3552
3553 if (htab->glink == NULL
3554 && !ppc_elf_create_glink (abfd, info))
3555 return FALSE;
3556
3557 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3558 SEC_ALLOC | SEC_LINKER_CREATED);
3559 htab->dynsbss = s;
3560 if (s == NULL)
3561 return FALSE;
3562
3563 if (! bfd_link_pic (info))
3564 {
3565 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3567 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3568 htab->relsbss = s;
3569 if (s == NULL
3570 || ! bfd_set_section_alignment (abfd, s, 2))
3571 return FALSE;
3572 }
3573
3574 if (htab->is_vxworks
3575 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3576 return FALSE;
3577
3578 s = htab->elf.splt;
3579 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3580 if (htab->plt_type == PLT_VXWORKS)
3581 /* The VxWorks PLT is a loaded section with contents. */
3582 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3583 return bfd_set_section_flags (abfd, s, flags);
3584 }
3585
3586 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3587
3588 static void
3589 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3590 struct elf_link_hash_entry *dir,
3591 struct elf_link_hash_entry *ind)
3592 {
3593 struct ppc_elf_link_hash_entry *edir, *eind;
3594
3595 edir = (struct ppc_elf_link_hash_entry *) dir;
3596 eind = (struct ppc_elf_link_hash_entry *) ind;
3597
3598 edir->tls_mask |= eind->tls_mask;
3599 edir->has_sda_refs |= eind->has_sda_refs;
3600
3601 /* If called to transfer flags for a weakdef during processing
3602 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3603 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3604 if (!(ELIMINATE_COPY_RELOCS
3605 && eind->elf.root.type != bfd_link_hash_indirect
3606 && edir->elf.dynamic_adjusted))
3607 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3608
3609 if (edir->elf.versioned != versioned_hidden)
3610 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3611 edir->elf.ref_regular |= eind->elf.ref_regular;
3612 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3613 edir->elf.needs_plt |= eind->elf.needs_plt;
3614 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3615
3616 if (eind->dyn_relocs != NULL)
3617 {
3618 if (edir->dyn_relocs != NULL)
3619 {
3620 struct elf_dyn_relocs **pp;
3621 struct elf_dyn_relocs *p;
3622
3623 /* Add reloc counts against the indirect sym to the direct sym
3624 list. Merge any entries against the same section. */
3625 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3626 {
3627 struct elf_dyn_relocs *q;
3628
3629 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3630 if (q->sec == p->sec)
3631 {
3632 q->pc_count += p->pc_count;
3633 q->count += p->count;
3634 *pp = p->next;
3635 break;
3636 }
3637 if (q == NULL)
3638 pp = &p->next;
3639 }
3640 *pp = edir->dyn_relocs;
3641 }
3642
3643 edir->dyn_relocs = eind->dyn_relocs;
3644 eind->dyn_relocs = NULL;
3645 }
3646
3647 /* If we were called to copy over info for a weak sym, that's all.
3648 You might think dyn_relocs need not be copied over; After all,
3649 both syms will be dynamic or both non-dynamic so we're just
3650 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3651 code in ppc_elf_adjust_dynamic_symbol needs to check for
3652 dyn_relocs in read-only sections, and it does so on what is the
3653 DIR sym here. */
3654 if (eind->elf.root.type != bfd_link_hash_indirect)
3655 return;
3656
3657 /* Copy over the GOT refcount entries that we may have already seen to
3658 the symbol which just became indirect. */
3659 edir->elf.got.refcount += eind->elf.got.refcount;
3660 eind->elf.got.refcount = 0;
3661
3662 /* And plt entries. */
3663 if (eind->elf.plt.plist != NULL)
3664 {
3665 if (edir->elf.plt.plist != NULL)
3666 {
3667 struct plt_entry **entp;
3668 struct plt_entry *ent;
3669
3670 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3671 {
3672 struct plt_entry *dent;
3673
3674 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3675 if (dent->sec == ent->sec && dent->addend == ent->addend)
3676 {
3677 dent->plt.refcount += ent->plt.refcount;
3678 *entp = ent->next;
3679 break;
3680 }
3681 if (dent == NULL)
3682 entp = &ent->next;
3683 }
3684 *entp = edir->elf.plt.plist;
3685 }
3686
3687 edir->elf.plt.plist = eind->elf.plt.plist;
3688 eind->elf.plt.plist = NULL;
3689 }
3690
3691 if (eind->elf.dynindx != -1)
3692 {
3693 if (edir->elf.dynindx != -1)
3694 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3695 edir->elf.dynstr_index);
3696 edir->elf.dynindx = eind->elf.dynindx;
3697 edir->elf.dynstr_index = eind->elf.dynstr_index;
3698 eind->elf.dynindx = -1;
3699 eind->elf.dynstr_index = 0;
3700 }
3701 }
3702
3703 /* Hook called by the linker routine which adds symbols from an object
3704 file. We use it to put .comm items in .sbss, and not .bss. */
3705
3706 static bfd_boolean
3707 ppc_elf_add_symbol_hook (bfd *abfd,
3708 struct bfd_link_info *info,
3709 Elf_Internal_Sym *sym,
3710 const char **namep ATTRIBUTE_UNUSED,
3711 flagword *flagsp ATTRIBUTE_UNUSED,
3712 asection **secp,
3713 bfd_vma *valp)
3714 {
3715 if (sym->st_shndx == SHN_COMMON
3716 && !bfd_link_relocatable (info)
3717 && is_ppc_elf (info->output_bfd)
3718 && sym->st_size <= elf_gp_size (abfd))
3719 {
3720 /* Common symbols less than or equal to -G nn bytes are automatically
3721 put into .sbss. */
3722 struct ppc_elf_link_hash_table *htab;
3723
3724 htab = ppc_elf_hash_table (info);
3725 if (htab->sbss == NULL)
3726 {
3727 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3728
3729 if (!htab->elf.dynobj)
3730 htab->elf.dynobj = abfd;
3731
3732 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3733 ".sbss",
3734 flags);
3735 if (htab->sbss == NULL)
3736 return FALSE;
3737 }
3738
3739 *secp = htab->sbss;
3740 *valp = sym->st_size;
3741 }
3742
3743 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3744 && (abfd->flags & DYNAMIC) == 0
3745 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3746 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3747
3748 return TRUE;
3749 }
3750 \f
3751 /* Find a linker generated pointer with a given addend and type. */
3752
3753 static elf_linker_section_pointers_t *
3754 elf_find_pointer_linker_section
3755 (elf_linker_section_pointers_t *linker_pointers,
3756 bfd_vma addend,
3757 elf_linker_section_t *lsect)
3758 {
3759 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3760 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3761 return linker_pointers;
3762
3763 return NULL;
3764 }
3765
3766 /* Allocate a pointer to live in a linker created section. */
3767
3768 static bfd_boolean
3769 elf_allocate_pointer_linker_section (bfd *abfd,
3770 elf_linker_section_t *lsect,
3771 struct elf_link_hash_entry *h,
3772 const Elf_Internal_Rela *rel)
3773 {
3774 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3775 elf_linker_section_pointers_t *linker_section_ptr;
3776 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3777 bfd_size_type amt;
3778
3779 BFD_ASSERT (lsect != NULL);
3780
3781 /* Is this a global symbol? */
3782 if (h != NULL)
3783 {
3784 struct ppc_elf_link_hash_entry *eh;
3785
3786 /* Has this symbol already been allocated? If so, our work is done. */
3787 eh = (struct ppc_elf_link_hash_entry *) h;
3788 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3789 rel->r_addend,
3790 lsect))
3791 return TRUE;
3792
3793 ptr_linker_section_ptr = &eh->linker_section_pointer;
3794 }
3795 else
3796 {
3797 BFD_ASSERT (is_ppc_elf (abfd));
3798
3799 /* Allocation of a pointer to a local symbol. */
3800 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3801
3802 /* Allocate a table to hold the local symbols if first time. */
3803 if (!ptr)
3804 {
3805 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3806
3807 amt = num_symbols;
3808 amt *= sizeof (elf_linker_section_pointers_t *);
3809 ptr = bfd_zalloc (abfd, amt);
3810
3811 if (!ptr)
3812 return FALSE;
3813
3814 elf_local_ptr_offsets (abfd) = ptr;
3815 }
3816
3817 /* Has this symbol already been allocated? If so, our work is done. */
3818 if (elf_find_pointer_linker_section (ptr[r_symndx],
3819 rel->r_addend,
3820 lsect))
3821 return TRUE;
3822
3823 ptr_linker_section_ptr = &ptr[r_symndx];
3824 }
3825
3826 /* Allocate space for a pointer in the linker section, and allocate
3827 a new pointer record from internal memory. */
3828 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3829 amt = sizeof (elf_linker_section_pointers_t);
3830 linker_section_ptr = bfd_alloc (abfd, amt);
3831
3832 if (!linker_section_ptr)
3833 return FALSE;
3834
3835 linker_section_ptr->next = *ptr_linker_section_ptr;
3836 linker_section_ptr->addend = rel->r_addend;
3837 linker_section_ptr->lsect = lsect;
3838 *ptr_linker_section_ptr = linker_section_ptr;
3839
3840 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3841 return FALSE;
3842 linker_section_ptr->offset = lsect->section->size;
3843 lsect->section->size += 4;
3844
3845 #ifdef DEBUG
3846 fprintf (stderr,
3847 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3848 lsect->name, (long) linker_section_ptr->offset,
3849 (long) lsect->section->size);
3850 #endif
3851
3852 return TRUE;
3853 }
3854
3855 static struct plt_entry **
3856 update_local_sym_info (bfd *abfd,
3857 Elf_Internal_Shdr *symtab_hdr,
3858 unsigned long r_symndx,
3859 int tls_type)
3860 {
3861 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3862 struct plt_entry **local_plt;
3863 char *local_got_tls_masks;
3864
3865 if (local_got_refcounts == NULL)
3866 {
3867 bfd_size_type size = symtab_hdr->sh_info;
3868
3869 size *= (sizeof (*local_got_refcounts)
3870 + sizeof (*local_plt)
3871 + sizeof (*local_got_tls_masks));
3872 local_got_refcounts = bfd_zalloc (abfd, size);
3873 if (local_got_refcounts == NULL)
3874 return NULL;
3875 elf_local_got_refcounts (abfd) = local_got_refcounts;
3876 }
3877
3878 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3879 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3880 local_got_tls_masks[r_symndx] |= tls_type;
3881 if (tls_type != PLT_IFUNC)
3882 local_got_refcounts[r_symndx] += 1;
3883 return local_plt + r_symndx;
3884 }
3885
3886 static bfd_boolean
3887 update_plt_info (bfd *abfd, struct plt_entry **plist,
3888 asection *sec, bfd_vma addend)
3889 {
3890 struct plt_entry *ent;
3891
3892 if (addend < 32768)
3893 sec = NULL;
3894 for (ent = *plist; ent != NULL; ent = ent->next)
3895 if (ent->sec == sec && ent->addend == addend)
3896 break;
3897 if (ent == NULL)
3898 {
3899 bfd_size_type amt = sizeof (*ent);
3900 ent = bfd_alloc (abfd, amt);
3901 if (ent == NULL)
3902 return FALSE;
3903 ent->next = *plist;
3904 ent->sec = sec;
3905 ent->addend = addend;
3906 ent->plt.refcount = 0;
3907 *plist = ent;
3908 }
3909 ent->plt.refcount += 1;
3910 return TRUE;
3911 }
3912
3913 static struct plt_entry *
3914 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3915 {
3916 struct plt_entry *ent;
3917
3918 if (addend < 32768)
3919 sec = NULL;
3920 for (ent = *plist; ent != NULL; ent = ent->next)
3921 if (ent->sec == sec && ent->addend == addend)
3922 break;
3923 return ent;
3924 }
3925
3926 static bfd_boolean
3927 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3928 {
3929 return (r_type == R_PPC_PLTREL24
3930 || r_type == R_PPC_LOCAL24PC
3931 || r_type == R_PPC_REL24
3932 || r_type == R_PPC_REL14
3933 || r_type == R_PPC_REL14_BRTAKEN
3934 || r_type == R_PPC_REL14_BRNTAKEN
3935 || r_type == R_PPC_ADDR24
3936 || r_type == R_PPC_ADDR14
3937 || r_type == R_PPC_ADDR14_BRTAKEN
3938 || r_type == R_PPC_ADDR14_BRNTAKEN
3939 || r_type == R_PPC_VLE_REL24);
3940 }
3941
3942 static void
3943 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3944 {
3945 _bfd_error_handler
3946 /* xgettext:c-format */
3947 (_("%B: relocation %s cannot be used when making a shared object"),
3948 abfd,
3949 ppc_elf_howto_table[r_type]->name);
3950 bfd_set_error (bfd_error_bad_value);
3951 }
3952
3953 /* Look through the relocs for a section during the first phase, and
3954 allocate space in the global offset table or procedure linkage
3955 table. */
3956
3957 static bfd_boolean
3958 ppc_elf_check_relocs (bfd *abfd,
3959 struct bfd_link_info *info,
3960 asection *sec,
3961 const Elf_Internal_Rela *relocs)
3962 {
3963 struct ppc_elf_link_hash_table *htab;
3964 Elf_Internal_Shdr *symtab_hdr;
3965 struct elf_link_hash_entry **sym_hashes;
3966 const Elf_Internal_Rela *rel;
3967 const Elf_Internal_Rela *rel_end;
3968 asection *got2, *sreloc;
3969 struct elf_link_hash_entry *tga;
3970
3971 if (bfd_link_relocatable (info))
3972 return TRUE;
3973
3974 /* Don't do anything special with non-loaded, non-alloced sections.
3975 In particular, any relocs in such sections should not affect GOT
3976 and PLT reference counting (ie. we don't allow them to create GOT
3977 or PLT entries), there's no possibility or desire to optimize TLS
3978 relocs, and there's not much point in propagating relocs to shared
3979 libs that the dynamic linker won't relocate. */
3980 if ((sec->flags & SEC_ALLOC) == 0)
3981 return TRUE;
3982
3983 #ifdef DEBUG
3984 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3985 sec, abfd);
3986 #endif
3987
3988 BFD_ASSERT (is_ppc_elf (abfd));
3989
3990 /* Initialize howto table if not already done. */
3991 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3992 ppc_elf_howto_init ();
3993
3994 htab = ppc_elf_hash_table (info);
3995 if (htab->glink == NULL)
3996 {
3997 if (htab->elf.dynobj == NULL)
3998 htab->elf.dynobj = abfd;
3999 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4000 return FALSE;
4001 }
4002 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4003 FALSE, FALSE, TRUE);
4004 symtab_hdr = &elf_symtab_hdr (abfd);
4005 sym_hashes = elf_sym_hashes (abfd);
4006 got2 = bfd_get_section_by_name (abfd, ".got2");
4007 sreloc = NULL;
4008
4009 rel_end = relocs + sec->reloc_count;
4010 for (rel = relocs; rel < rel_end; rel++)
4011 {
4012 unsigned long r_symndx;
4013 enum elf_ppc_reloc_type r_type;
4014 struct elf_link_hash_entry *h;
4015 int tls_type;
4016 struct plt_entry **ifunc;
4017
4018 r_symndx = ELF32_R_SYM (rel->r_info);
4019 if (r_symndx < symtab_hdr->sh_info)
4020 h = NULL;
4021 else
4022 {
4023 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4024 while (h->root.type == bfd_link_hash_indirect
4025 || h->root.type == bfd_link_hash_warning)
4026 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4027
4028 /* PR15323, ref flags aren't set for references in the same
4029 object. */
4030 h->root.non_ir_ref = 1;
4031 }
4032
4033 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4034 This shows up in particular in an R_PPC_ADDR32 in the eabi
4035 startup code. */
4036 if (h != NULL
4037 && htab->elf.sgot == NULL
4038 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4039 {
4040 if (htab->elf.dynobj == NULL)
4041 htab->elf.dynobj = abfd;
4042 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4043 return FALSE;
4044 BFD_ASSERT (h == htab->elf.hgot);
4045 }
4046
4047 tls_type = 0;
4048 r_type = ELF32_R_TYPE (rel->r_info);
4049 ifunc = NULL;
4050 if (h == NULL && !htab->is_vxworks)
4051 {
4052 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4053 abfd, r_symndx);
4054 if (isym == NULL)
4055 return FALSE;
4056
4057 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4058 {
4059 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4060 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4061 PLT_IFUNC);
4062 if (ifunc == NULL)
4063 return FALSE;
4064
4065 /* STT_GNU_IFUNC symbols must have a PLT entry;
4066 In a non-pie executable even when there are
4067 no plt calls. */
4068 if (!bfd_link_pic (info)
4069 || is_branch_reloc (r_type))
4070 {
4071 bfd_vma addend = 0;
4072 if (r_type == R_PPC_PLTREL24)
4073 {
4074 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4075 if (bfd_link_pic (info))
4076 addend = rel->r_addend;
4077 }
4078 if (!update_plt_info (abfd, ifunc, got2, addend))
4079 return FALSE;
4080 }
4081 }
4082 }
4083
4084 if (!htab->is_vxworks
4085 && is_branch_reloc (r_type)
4086 && h != NULL
4087 && h == tga)
4088 {
4089 if (rel != relocs
4090 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4091 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4092 /* We have a new-style __tls_get_addr call with a marker
4093 reloc. */
4094 ;
4095 else
4096 /* Mark this section as having an old-style call. */
4097 sec->has_tls_get_addr_call = 1;
4098 }
4099
4100 switch (r_type)
4101 {
4102 case R_PPC_TLSGD:
4103 case R_PPC_TLSLD:
4104 /* These special tls relocs tie a call to __tls_get_addr with
4105 its parameter symbol. */
4106 break;
4107
4108 case R_PPC_GOT_TLSLD16:
4109 case R_PPC_GOT_TLSLD16_LO:
4110 case R_PPC_GOT_TLSLD16_HI:
4111 case R_PPC_GOT_TLSLD16_HA:
4112 tls_type = TLS_TLS | TLS_LD;
4113 goto dogottls;
4114
4115 case R_PPC_GOT_TLSGD16:
4116 case R_PPC_GOT_TLSGD16_LO:
4117 case R_PPC_GOT_TLSGD16_HI:
4118 case R_PPC_GOT_TLSGD16_HA:
4119 tls_type = TLS_TLS | TLS_GD;
4120 goto dogottls;
4121
4122 case R_PPC_GOT_TPREL16:
4123 case R_PPC_GOT_TPREL16_LO:
4124 case R_PPC_GOT_TPREL16_HI:
4125 case R_PPC_GOT_TPREL16_HA:
4126 if (bfd_link_pic (info))
4127 info->flags |= DF_STATIC_TLS;
4128 tls_type = TLS_TLS | TLS_TPREL;
4129 goto dogottls;
4130
4131 case R_PPC_GOT_DTPREL16:
4132 case R_PPC_GOT_DTPREL16_LO:
4133 case R_PPC_GOT_DTPREL16_HI:
4134 case R_PPC_GOT_DTPREL16_HA:
4135 tls_type = TLS_TLS | TLS_DTPREL;
4136 dogottls:
4137 sec->has_tls_reloc = 1;
4138 /* Fall through. */
4139
4140 /* GOT16 relocations */
4141 case R_PPC_GOT16:
4142 case R_PPC_GOT16_LO:
4143 case R_PPC_GOT16_HI:
4144 case R_PPC_GOT16_HA:
4145 /* This symbol requires a global offset table entry. */
4146 if (htab->elf.sgot == NULL)
4147 {
4148 if (htab->elf.dynobj == NULL)
4149 htab->elf.dynobj = abfd;
4150 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4151 return FALSE;
4152 }
4153 if (h != NULL)
4154 {
4155 h->got.refcount += 1;
4156 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4157 }
4158 else
4159 /* This is a global offset table entry for a local symbol. */
4160 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4161 return FALSE;
4162
4163 /* We may also need a plt entry if the symbol turns out to be
4164 an ifunc. */
4165 if (h != NULL && !bfd_link_pic (info))
4166 {
4167 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4168 return FALSE;
4169 }
4170 break;
4171
4172 /* Indirect .sdata relocation. */
4173 case R_PPC_EMB_SDAI16:
4174 if (bfd_link_pic (info))
4175 {
4176 bad_shared_reloc (abfd, r_type);
4177 return FALSE;
4178 }
4179 htab->sdata[0].sym->ref_regular = 1;
4180 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4181 h, rel))
4182 return FALSE;
4183 if (h != NULL)
4184 {
4185 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4186 h->non_got_ref = TRUE;
4187 }
4188 break;
4189
4190 /* Indirect .sdata2 relocation. */
4191 case R_PPC_EMB_SDA2I16:
4192 if (bfd_link_pic (info))
4193 {
4194 bad_shared_reloc (abfd, r_type);
4195 return FALSE;
4196 }
4197 htab->sdata[1].sym->ref_regular = 1;
4198 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4199 h, rel))
4200 return FALSE;
4201 if (h != NULL)
4202 {
4203 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4204 h->non_got_ref = TRUE;
4205 }
4206 break;
4207
4208 case R_PPC_SDAREL16:
4209 htab->sdata[0].sym->ref_regular = 1;
4210 /* Fall through. */
4211
4212 case R_PPC_VLE_SDAREL_LO16A:
4213 case R_PPC_VLE_SDAREL_LO16D:
4214 case R_PPC_VLE_SDAREL_HI16A:
4215 case R_PPC_VLE_SDAREL_HI16D:
4216 case R_PPC_VLE_SDAREL_HA16A:
4217 case R_PPC_VLE_SDAREL_HA16D:
4218 if (h != NULL)
4219 {
4220 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4221 h->non_got_ref = TRUE;
4222 }
4223 break;
4224
4225 case R_PPC_VLE_REL8:
4226 case R_PPC_VLE_REL15:
4227 case R_PPC_VLE_REL24:
4228 case R_PPC_VLE_LO16A:
4229 case R_PPC_VLE_LO16D:
4230 case R_PPC_VLE_HI16A:
4231 case R_PPC_VLE_HI16D:
4232 case R_PPC_VLE_HA16A:
4233 case R_PPC_VLE_HA16D:
4234 break;
4235
4236 case R_PPC_EMB_SDA2REL:
4237 if (bfd_link_pic (info))
4238 {
4239 bad_shared_reloc (abfd, r_type);
4240 return FALSE;
4241 }
4242 htab->sdata[1].sym->ref_regular = 1;
4243 if (h != NULL)
4244 {
4245 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4246 h->non_got_ref = TRUE;
4247 }
4248 break;
4249
4250 case R_PPC_VLE_SDA21_LO:
4251 case R_PPC_VLE_SDA21:
4252 case R_PPC_EMB_SDA21:
4253 case R_PPC_EMB_RELSDA:
4254 if (bfd_link_pic (info))
4255 {
4256 bad_shared_reloc (abfd, r_type);
4257 return FALSE;
4258 }
4259 if (h != NULL)
4260 {
4261 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4262 h->non_got_ref = TRUE;
4263 }
4264 break;
4265
4266 case R_PPC_EMB_NADDR32:
4267 case R_PPC_EMB_NADDR16:
4268 case R_PPC_EMB_NADDR16_LO:
4269 case R_PPC_EMB_NADDR16_HI:
4270 case R_PPC_EMB_NADDR16_HA:
4271 if (bfd_link_pic (info))
4272 {
4273 bad_shared_reloc (abfd, r_type);
4274 return FALSE;
4275 }
4276 if (h != NULL)
4277 h->non_got_ref = TRUE;
4278 break;
4279
4280 case R_PPC_PLTREL24:
4281 if (h == NULL)
4282 break;
4283 /* Fall through */
4284 case R_PPC_PLT32:
4285 case R_PPC_PLTREL32:
4286 case R_PPC_PLT16_LO:
4287 case R_PPC_PLT16_HI:
4288 case R_PPC_PLT16_HA:
4289 #ifdef DEBUG
4290 fprintf (stderr, "Reloc requires a PLT entry\n");
4291 #endif
4292 /* This symbol requires a procedure linkage table entry. */
4293 if (h == NULL)
4294 {
4295 if (ifunc == NULL)
4296 {
4297 /* It does not make sense to have a procedure linkage
4298 table entry for a non-ifunc local symbol. */
4299 info->callbacks->einfo
4300 /* xgettext:c-format */
4301 (_("%P: %H: %s reloc against local symbol\n"),
4302 abfd, sec, rel->r_offset,
4303 ppc_elf_howto_table[r_type]->name);
4304 bfd_set_error (bfd_error_bad_value);
4305 return FALSE;
4306 }
4307 }
4308 else
4309 {
4310 bfd_vma addend = 0;
4311
4312 if (r_type == R_PPC_PLTREL24)
4313 {
4314 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4315 if (bfd_link_pic (info))
4316 addend = rel->r_addend;
4317 }
4318 h->needs_plt = 1;
4319 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4320 return FALSE;
4321 }
4322 break;
4323
4324 /* The following relocations don't need to propagate the
4325 relocation if linking a shared object since they are
4326 section relative. */
4327 case R_PPC_SECTOFF:
4328 case R_PPC_SECTOFF_LO:
4329 case R_PPC_SECTOFF_HI:
4330 case R_PPC_SECTOFF_HA:
4331 case R_PPC_DTPREL16:
4332 case R_PPC_DTPREL16_LO:
4333 case R_PPC_DTPREL16_HI:
4334 case R_PPC_DTPREL16_HA:
4335 case R_PPC_TOC16:
4336 break;
4337
4338 case R_PPC_REL16:
4339 case R_PPC_REL16_LO:
4340 case R_PPC_REL16_HI:
4341 case R_PPC_REL16_HA:
4342 case R_PPC_REL16DX_HA:
4343 ppc_elf_tdata (abfd)->has_rel16 = 1;
4344 break;
4345
4346 /* These are just markers. */
4347 case R_PPC_TLS:
4348 case R_PPC_EMB_MRKREF:
4349 case R_PPC_NONE:
4350 case R_PPC_max:
4351 case R_PPC_RELAX:
4352 case R_PPC_RELAX_PLT:
4353 case R_PPC_RELAX_PLTREL24:
4354 break;
4355
4356 /* These should only appear in dynamic objects. */
4357 case R_PPC_COPY:
4358 case R_PPC_GLOB_DAT:
4359 case R_PPC_JMP_SLOT:
4360 case R_PPC_RELATIVE:
4361 case R_PPC_IRELATIVE:
4362 break;
4363
4364 /* These aren't handled yet. We'll report an error later. */
4365 case R_PPC_ADDR30:
4366 case R_PPC_EMB_RELSEC16:
4367 case R_PPC_EMB_RELST_LO:
4368 case R_PPC_EMB_RELST_HI:
4369 case R_PPC_EMB_RELST_HA:
4370 case R_PPC_EMB_BIT_FLD:
4371 break;
4372
4373 /* This refers only to functions defined in the shared library. */
4374 case R_PPC_LOCAL24PC:
4375 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4376 {
4377 htab->plt_type = PLT_OLD;
4378 htab->old_bfd = abfd;
4379 }
4380 if (h != NULL && h->type == STT_GNU_IFUNC)
4381 {
4382 h->needs_plt = 1;
4383 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4384 return FALSE;
4385 }
4386 break;
4387
4388 /* This relocation describes the C++ object vtable hierarchy.
4389 Reconstruct it for later use during GC. */
4390 case R_PPC_GNU_VTINHERIT:
4391 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4392 return FALSE;
4393 break;
4394
4395 /* This relocation describes which C++ vtable entries are actually
4396 used. Record for later use during GC. */
4397 case R_PPC_GNU_VTENTRY:
4398 BFD_ASSERT (h != NULL);
4399 if (h != NULL
4400 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4401 return FALSE;
4402 break;
4403
4404 /* We shouldn't really be seeing these. */
4405 case R_PPC_TPREL32:
4406 case R_PPC_TPREL16:
4407 case R_PPC_TPREL16_LO:
4408 case R_PPC_TPREL16_HI:
4409 case R_PPC_TPREL16_HA:
4410 if (bfd_link_pic (info))
4411 info->flags |= DF_STATIC_TLS;
4412 goto dodyn;
4413
4414 /* Nor these. */
4415 case R_PPC_DTPMOD32:
4416 case R_PPC_DTPREL32:
4417 goto dodyn;
4418
4419 case R_PPC_REL32:
4420 if (h == NULL
4421 && got2 != NULL
4422 && (sec->flags & SEC_CODE) != 0
4423 && bfd_link_pic (info)
4424 && htab->plt_type == PLT_UNSET)
4425 {
4426 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4427 the start of a function, which assembles to a REL32
4428 reference to .got2. If we detect one of these, then
4429 force the old PLT layout because the linker cannot
4430 reliably deduce the GOT pointer value needed for
4431 PLT call stubs. */
4432 asection *s;
4433 Elf_Internal_Sym *isym;
4434
4435 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4436 abfd, r_symndx);
4437 if (isym == NULL)
4438 return FALSE;
4439
4440 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4441 if (s == got2)
4442 {
4443 htab->plt_type = PLT_OLD;
4444 htab->old_bfd = abfd;
4445 }
4446 }
4447 if (h == NULL || h == htab->elf.hgot)
4448 break;
4449 /* fall through */
4450
4451 case R_PPC_ADDR32:
4452 case R_PPC_ADDR16:
4453 case R_PPC_ADDR16_LO:
4454 case R_PPC_ADDR16_HI:
4455 case R_PPC_ADDR16_HA:
4456 case R_PPC_UADDR32:
4457 case R_PPC_UADDR16:
4458 if (h != NULL && !bfd_link_pic (info))
4459 {
4460 /* We may need a plt entry if the symbol turns out to be
4461 a function defined in a dynamic object. */
4462 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4463 return FALSE;
4464
4465 /* We may need a copy reloc too. */
4466 h->non_got_ref = 1;
4467 h->pointer_equality_needed = 1;
4468 if (r_type == R_PPC_ADDR16_HA)
4469 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4470 if (r_type == R_PPC_ADDR16_LO)
4471 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4472 }
4473 goto dodyn;
4474
4475 case R_PPC_REL24:
4476 case R_PPC_REL14:
4477 case R_PPC_REL14_BRTAKEN:
4478 case R_PPC_REL14_BRNTAKEN:
4479 if (h == NULL)
4480 break;
4481 if (h == htab->elf.hgot)
4482 {
4483 if (htab->plt_type == PLT_UNSET)
4484 {
4485 htab->plt_type = PLT_OLD;
4486 htab->old_bfd = abfd;
4487 }
4488 break;
4489 }
4490 /* fall through */
4491
4492 case R_PPC_ADDR24:
4493 case R_PPC_ADDR14:
4494 case R_PPC_ADDR14_BRTAKEN:
4495 case R_PPC_ADDR14_BRNTAKEN:
4496 if (h != NULL && !bfd_link_pic (info))
4497 {
4498 /* We may need a plt entry if the symbol turns out to be
4499 a function defined in a dynamic object. */
4500 h->needs_plt = 1;
4501 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4502 return FALSE;
4503 break;
4504 }
4505
4506 dodyn:
4507 /* If we are creating a shared library, and this is a reloc
4508 against a global symbol, or a non PC relative reloc
4509 against a local symbol, then we need to copy the reloc
4510 into the shared library. However, if we are linking with
4511 -Bsymbolic, we do not need to copy a reloc against a
4512 global symbol which is defined in an object we are
4513 including in the link (i.e., DEF_REGULAR is set). At
4514 this point we have not seen all the input files, so it is
4515 possible that DEF_REGULAR is not set now but will be set
4516 later (it is never cleared). In case of a weak definition,
4517 DEF_REGULAR may be cleared later by a strong definition in
4518 a shared library. We account for that possibility below by
4519 storing information in the dyn_relocs field of the hash
4520 table entry. A similar situation occurs when creating
4521 shared libraries and symbol visibility changes render the
4522 symbol local.
4523
4524 If on the other hand, we are creating an executable, we
4525 may need to keep relocations for symbols satisfied by a
4526 dynamic library if we manage to avoid copy relocs for the
4527 symbol. */
4528 if ((bfd_link_pic (info)
4529 && (must_be_dyn_reloc (info, r_type)
4530 || (h != NULL
4531 && (!SYMBOLIC_BIND (info, h)
4532 || h->root.type == bfd_link_hash_defweak
4533 || !h->def_regular))))
4534 || (ELIMINATE_COPY_RELOCS
4535 && !bfd_link_pic (info)
4536 && h != NULL
4537 && (h->root.type == bfd_link_hash_defweak
4538 || !h->def_regular)))
4539 {
4540 #ifdef DEBUG
4541 fprintf (stderr,
4542 "ppc_elf_check_relocs needs to "
4543 "create relocation for %s\n",
4544 (h && h->root.root.string
4545 ? h->root.root.string : "<unknown>"));
4546 #endif
4547 if (sreloc == NULL)
4548 {
4549 if (htab->elf.dynobj == NULL)
4550 htab->elf.dynobj = abfd;
4551
4552 sreloc = _bfd_elf_make_dynamic_reloc_section
4553 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4554
4555 if (sreloc == NULL)
4556 return FALSE;
4557 }
4558
4559 /* If this is a global symbol, we count the number of
4560 relocations we need for this symbol. */
4561 if (h != NULL)
4562 {
4563 struct elf_dyn_relocs *p;
4564 struct elf_dyn_relocs **rel_head;
4565
4566 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4567 p = *rel_head;
4568 if (p == NULL || p->sec != sec)
4569 {
4570 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4571 if (p == NULL)
4572 return FALSE;
4573 p->next = *rel_head;
4574 *rel_head = p;
4575 p->sec = sec;
4576 p->count = 0;
4577 p->pc_count = 0;
4578 }
4579 p->count += 1;
4580 if (!must_be_dyn_reloc (info, r_type))
4581 p->pc_count += 1;
4582 }
4583 else
4584 {
4585 /* Track dynamic relocs needed for local syms too.
4586 We really need local syms available to do this
4587 easily. Oh well. */
4588 struct ppc_dyn_relocs *p;
4589 struct ppc_dyn_relocs **rel_head;
4590 bfd_boolean is_ifunc;
4591 asection *s;
4592 void *vpp;
4593 Elf_Internal_Sym *isym;
4594
4595 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4596 abfd, r_symndx);
4597 if (isym == NULL)
4598 return FALSE;
4599
4600 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4601 if (s == NULL)
4602 s = sec;
4603
4604 vpp = &elf_section_data (s)->local_dynrel;
4605 rel_head = (struct ppc_dyn_relocs **) vpp;
4606 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4607 p = *rel_head;
4608 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4609 p = p->next;
4610 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4611 {
4612 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4613 if (p == NULL)
4614 return FALSE;
4615 p->next = *rel_head;
4616 *rel_head = p;
4617 p->sec = sec;
4618 p->ifunc = is_ifunc;
4619 p->count = 0;
4620 }
4621 p->count += 1;
4622 }
4623 }
4624
4625 break;
4626 }
4627 }
4628
4629 return TRUE;
4630 }
4631 \f
4632 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4633 and OBFD, and merge non-conflicting ones. */
4634 void
4635 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4636 {
4637 bfd *obfd = info->output_bfd;
4638 obj_attribute *in_attr, *in_attrs;
4639 obj_attribute *out_attr, *out_attrs;
4640
4641 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4642 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4643
4644 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4645 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4646
4647 if (in_attr->i != out_attr->i)
4648 {
4649 int in_fp = in_attr->i & 3;
4650 int out_fp = out_attr->i & 3;
4651
4652 if (in_fp == 0)
4653 ;
4654 else if (out_fp == 0)
4655 {
4656 out_attr->type = 1;
4657 out_attr->i ^= in_fp;
4658 }
4659 else if (out_fp != 2 && in_fp == 2)
4660 _bfd_error_handler
4661 /* xgettext:c-format */
4662 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4663 else if (out_fp == 2 && in_fp != 2)
4664 _bfd_error_handler
4665 /* xgettext:c-format */
4666 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4667 else if (out_fp == 1 && in_fp == 3)
4668 _bfd_error_handler
4669 /* xgettext:c-format */
4670 (_("Warning: %B uses double-precision hard float, "
4671 "%B uses single-precision hard float"), obfd, ibfd);
4672 else if (out_fp == 3 && in_fp == 1)
4673 _bfd_error_handler
4674 /* xgettext:c-format */
4675 (_("Warning: %B uses double-precision hard float, "
4676 "%B uses single-precision hard float"), ibfd, obfd);
4677
4678 in_fp = in_attr->i & 0xc;
4679 out_fp = out_attr->i & 0xc;
4680 if (in_fp == 0)
4681 ;
4682 else if (out_fp == 0)
4683 {
4684 out_attr->type = 1;
4685 out_attr->i ^= in_fp;
4686 }
4687 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4688 _bfd_error_handler
4689 /* xgettext:c-format */
4690 (_("Warning: %B uses 64-bit long double, "
4691 "%B uses 128-bit long double"), ibfd, obfd);
4692 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4693 _bfd_error_handler
4694 /* xgettext:c-format */
4695 (_("Warning: %B uses 64-bit long double, "
4696 "%B uses 128-bit long double"), obfd, ibfd);
4697 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4698 _bfd_error_handler
4699 /* xgettext:c-format */
4700 (_("Warning: %B uses IBM long double, "
4701 "%B uses IEEE long double"), ibfd, obfd);
4702 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4703 _bfd_error_handler
4704 /* xgettext:c-format */
4705 (_("Warning: %B uses IBM long double, "
4706 "%B uses IEEE long double"), obfd, ibfd);
4707 }
4708 }
4709
4710 /* Merge object attributes from IBFD into OBFD. Warn if
4711 there are conflicting attributes. */
4712 static bfd_boolean
4713 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4714 {
4715 bfd *obfd;
4716 obj_attribute *in_attr, *in_attrs;
4717 obj_attribute *out_attr, *out_attrs;
4718
4719 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4720
4721 obfd = info->output_bfd;
4722 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4723 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4724
4725 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4726 merge non-conflicting ones. */
4727 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4728 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4729 if (in_attr->i != out_attr->i)
4730 {
4731 int in_vec = in_attr->i & 3;
4732 int out_vec = out_attr->i & 3;
4733
4734 if (in_vec == 0)
4735 ;
4736 else if (out_vec == 0)
4737 {
4738 out_attr->type = 1;
4739 out_attr->i = in_vec;
4740 }
4741 /* For now, allow generic to transition to AltiVec or SPE
4742 without a warning. If GCC marked files with their stack
4743 alignment and used don't-care markings for files which are
4744 not affected by the vector ABI, we could warn about this
4745 case too. */
4746 else if (in_vec == 1)
4747 ;
4748 else if (out_vec == 1)
4749 {
4750 out_attr->type = 1;
4751 out_attr->i = in_vec;
4752 }
4753 else if (out_vec < in_vec)
4754 _bfd_error_handler
4755 /* xgettext:c-format */
4756 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4757 obfd, ibfd);
4758 else if (out_vec > in_vec)
4759 _bfd_error_handler
4760 /* xgettext:c-format */
4761 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4762 ibfd, obfd);
4763 }
4764
4765 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4766 and merge non-conflicting ones. */
4767 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4768 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4769 if (in_attr->i != out_attr->i)
4770 {
4771 int in_struct = in_attr->i & 3;
4772 int out_struct = out_attr->i & 3;
4773
4774 if (in_struct == 0 || in_struct == 3)
4775 ;
4776 else if (out_struct == 0)
4777 {
4778 out_attr->type = 1;
4779 out_attr->i = in_struct;
4780 }
4781 else if (out_struct < in_struct)
4782 _bfd_error_handler
4783 /* xgettext:c-format */
4784 (_("Warning: %B uses r3/r4 for small structure returns, "
4785 "%B uses memory"), obfd, ibfd);
4786 else if (out_struct > in_struct)
4787 _bfd_error_handler
4788 /* xgettext:c-format */
4789 (_("Warning: %B uses r3/r4 for small structure returns, "
4790 "%B uses memory"), ibfd, obfd);
4791 }
4792
4793 /* Merge Tag_compatibility attributes and any common GNU ones. */
4794 _bfd_elf_merge_object_attributes (ibfd, info);
4795
4796 return TRUE;
4797 }
4798
4799 /* Merge backend specific data from an object file to the output
4800 object file when linking. */
4801
4802 static bfd_boolean
4803 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4804 {
4805 bfd *obfd = info->output_bfd;
4806 flagword old_flags;
4807 flagword new_flags;
4808 bfd_boolean error;
4809
4810 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4811 return TRUE;
4812
4813 /* Check if we have the same endianness. */
4814 if (! _bfd_generic_verify_endian_match (ibfd, info))
4815 return FALSE;
4816
4817 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4818 return FALSE;
4819
4820 new_flags = elf_elfheader (ibfd)->e_flags;
4821 old_flags = elf_elfheader (obfd)->e_flags;
4822 if (!elf_flags_init (obfd))
4823 {
4824 /* First call, no flags set. */
4825 elf_flags_init (obfd) = TRUE;
4826 elf_elfheader (obfd)->e_flags = new_flags;
4827 }
4828
4829 /* Compatible flags are ok. */
4830 else if (new_flags == old_flags)
4831 ;
4832
4833 /* Incompatible flags. */
4834 else
4835 {
4836 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4837 to be linked with either. */
4838 error = FALSE;
4839 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4840 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4841 {
4842 error = TRUE;
4843 _bfd_error_handler
4844 (_("%B: compiled with -mrelocatable and linked with "
4845 "modules compiled normally"), ibfd);
4846 }
4847 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4848 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4849 {
4850 error = TRUE;
4851 _bfd_error_handler
4852 (_("%B: compiled normally and linked with "
4853 "modules compiled with -mrelocatable"), ibfd);
4854 }
4855
4856 /* The output is -mrelocatable-lib iff both the input files are. */
4857 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4858 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4859
4860 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4861 but each input file is either -mrelocatable or -mrelocatable-lib. */
4862 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4863 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4864 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4865 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4866
4867 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4868 any module uses it. */
4869 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4870
4871 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4872 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4873
4874 /* Warn about any other mismatches. */
4875 if (new_flags != old_flags)
4876 {
4877 error = TRUE;
4878 _bfd_error_handler
4879 /* xgettext:c-format */
4880 (_("%B: uses different e_flags (0x%lx) fields "
4881 "than previous modules (0x%lx)"),
4882 ibfd, (long) new_flags, (long) old_flags);
4883 }
4884
4885 if (error)
4886 {
4887 bfd_set_error (bfd_error_bad_value);
4888 return FALSE;
4889 }
4890 }
4891
4892 return TRUE;
4893 }
4894
4895 static void
4896 ppc_elf_vle_split16 (bfd *input_bfd,
4897 asection *input_section,
4898 unsigned long offset,
4899 bfd_byte *loc,
4900 bfd_vma value,
4901 split16_format_type split16_format,
4902 bfd_boolean fixup)
4903 {
4904 unsigned int insn, opcode, top5;
4905
4906 insn = bfd_get_32 (input_bfd, loc);
4907 opcode = insn & 0xf300f800;
4908 if (opcode == E_OR2I_INSN
4909 || opcode == E_AND2I_DOT_INSN
4910 || opcode == E_OR2IS_INSN
4911 || opcode == E_LIS_INSN
4912 || opcode == E_AND2IS_DOT_INSN)
4913 {
4914 if (split16_format != split16a_type)
4915 {
4916 if (fixup)
4917 split16_format = split16a_type;
4918 else
4919 _bfd_error_handler
4920 /* xgettext:c-format */
4921 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4922 input_bfd, input_section, offset, opcode);
4923 }
4924 }
4925 else if (opcode == E_ADD2I_DOT_INSN
4926 || opcode == E_ADD2IS_INSN
4927 || opcode == E_CMP16I_INSN
4928 || opcode == E_MULL2I_INSN
4929 || opcode == E_CMPL16I_INSN
4930 || opcode == E_CMPH16I_INSN
4931 || opcode == E_CMPHL16I_INSN)
4932 {
4933 if (split16_format != split16d_type)
4934 {
4935 if (fixup)
4936 split16_format = split16d_type;
4937 else
4938 _bfd_error_handler
4939 /* xgettext:c-format */
4940 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4941 input_bfd, input_section, offset, opcode);
4942 }
4943 }
4944 top5 = value & 0xf800;
4945 top5 = top5 << (split16_format == split16a_type ? 5 : 9);
4946 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x1f007ff);
4947 insn |= top5;
4948 insn |= value & 0x7ff;
4949 bfd_put_32 (input_bfd, insn, loc);
4950 }
4951 \f
4952 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4953 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4954 int
4955 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4956 struct bfd_link_info *info)
4957 {
4958 struct ppc_elf_link_hash_table *htab;
4959 flagword flags;
4960
4961 htab = ppc_elf_hash_table (info);
4962
4963 if (htab->plt_type == PLT_UNSET)
4964 {
4965 struct elf_link_hash_entry *h;
4966
4967 if (htab->params->plt_style == PLT_OLD)
4968 htab->plt_type = PLT_OLD;
4969 else if (bfd_link_pic (info)
4970 && htab->elf.dynamic_sections_created
4971 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4972 FALSE, FALSE, TRUE)) != NULL
4973 && (h->type == STT_FUNC
4974 || h->needs_plt)
4975 && h->ref_regular
4976 && !(SYMBOL_CALLS_LOCAL (info, h)
4977 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4978 && h->root.type == bfd_link_hash_undefweak)))
4979 {
4980 /* Profiling of shared libs (and pies) is not supported with
4981 secure plt, because ppc32 does profiling before a
4982 function prologue and a secure plt pic call stubs needs
4983 r30 to be set up. */
4984 htab->plt_type = PLT_OLD;
4985 }
4986 else
4987 {
4988 bfd *ibfd;
4989 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4990
4991 /* Look through the reloc flags left by ppc_elf_check_relocs.
4992 Use the old style bss plt if a file makes plt calls
4993 without using the new relocs, and if ld isn't given
4994 --secure-plt and we never see REL16 relocs. */
4995 if (plt_type == PLT_UNSET)
4996 plt_type = PLT_OLD;
4997 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4998 if (is_ppc_elf (ibfd))
4999 {
5000 if (ppc_elf_tdata (ibfd)->has_rel16)
5001 plt_type = PLT_NEW;
5002 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5003 {
5004 plt_type = PLT_OLD;
5005 htab->old_bfd = ibfd;
5006 break;
5007 }
5008 }
5009 htab->plt_type = plt_type;
5010 }
5011 }
5012 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5013 {
5014 if (htab->old_bfd != NULL)
5015 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5016 htab->old_bfd);
5017 else
5018 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5019 }
5020
5021 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5022
5023 if (htab->plt_type == PLT_NEW)
5024 {
5025 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5026 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5027
5028 /* The new PLT is a loaded section. */
5029 if (htab->elf.splt != NULL
5030 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5031 return -1;
5032
5033 /* The new GOT is not executable. */
5034 if (htab->elf.sgot != NULL
5035 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5036 return -1;
5037 }
5038 else
5039 {
5040 /* Stop an unused .glink section from affecting .text alignment. */
5041 if (htab->glink != NULL
5042 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5043 return -1;
5044 }
5045 return htab->plt_type == PLT_NEW;
5046 }
5047 \f
5048 /* Return the section that should be marked against GC for a given
5049 relocation. */
5050
5051 static asection *
5052 ppc_elf_gc_mark_hook (asection *sec,
5053 struct bfd_link_info *info,
5054 Elf_Internal_Rela *rel,
5055 struct elf_link_hash_entry *h,
5056 Elf_Internal_Sym *sym)
5057 {
5058 if (h != NULL)
5059 switch (ELF32_R_TYPE (rel->r_info))
5060 {
5061 case R_PPC_GNU_VTINHERIT:
5062 case R_PPC_GNU_VTENTRY:
5063 return NULL;
5064 }
5065
5066 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5067 }
5068
5069 /* Update the got, plt and dynamic reloc reference counts for the
5070 section being removed. */
5071
5072 static bfd_boolean
5073 ppc_elf_gc_sweep_hook (bfd *abfd,
5074 struct bfd_link_info *info,
5075 asection *sec,
5076 const Elf_Internal_Rela *relocs)
5077 {
5078 struct ppc_elf_link_hash_table *htab;
5079 Elf_Internal_Shdr *symtab_hdr;
5080 struct elf_link_hash_entry **sym_hashes;
5081 bfd_signed_vma *local_got_refcounts;
5082 const Elf_Internal_Rela *rel, *relend;
5083 asection *got2;
5084
5085 if (bfd_link_relocatable (info))
5086 return TRUE;
5087
5088 if ((sec->flags & SEC_ALLOC) == 0)
5089 return TRUE;
5090
5091 elf_section_data (sec)->local_dynrel = NULL;
5092
5093 htab = ppc_elf_hash_table (info);
5094 symtab_hdr = &elf_symtab_hdr (abfd);
5095 sym_hashes = elf_sym_hashes (abfd);
5096 local_got_refcounts = elf_local_got_refcounts (abfd);
5097 got2 = bfd_get_section_by_name (abfd, ".got2");
5098
5099 relend = relocs + sec->reloc_count;
5100 for (rel = relocs; rel < relend; rel++)
5101 {
5102 unsigned long r_symndx;
5103 enum elf_ppc_reloc_type r_type;
5104 struct elf_link_hash_entry *h = NULL;
5105
5106 r_symndx = ELF32_R_SYM (rel->r_info);
5107 if (r_symndx >= symtab_hdr->sh_info)
5108 {
5109 struct elf_dyn_relocs **pp, *p;
5110 struct ppc_elf_link_hash_entry *eh;
5111
5112 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5113 while (h->root.type == bfd_link_hash_indirect
5114 || h->root.type == bfd_link_hash_warning)
5115 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5116 eh = (struct ppc_elf_link_hash_entry *) h;
5117
5118 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5119 if (p->sec == sec)
5120 {
5121 /* Everything must go for SEC. */
5122 *pp = p->next;
5123 break;
5124 }
5125 }
5126
5127 r_type = ELF32_R_TYPE (rel->r_info);
5128 if (!htab->is_vxworks
5129 && h == NULL
5130 && local_got_refcounts != NULL
5131 && (!bfd_link_pic (info)
5132 || is_branch_reloc (r_type)))
5133 {
5134 struct plt_entry **local_plt = (struct plt_entry **)
5135 (local_got_refcounts + symtab_hdr->sh_info);
5136 char *local_got_tls_masks = (char *)
5137 (local_plt + symtab_hdr->sh_info);
5138 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5139 {
5140 struct plt_entry **ifunc = local_plt + r_symndx;
5141 bfd_vma addend = 0;
5142 struct plt_entry *ent;
5143
5144 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5145 addend = rel->r_addend;
5146 ent = find_plt_ent (ifunc, got2, addend);
5147 if (ent->plt.refcount > 0)
5148 ent->plt.refcount -= 1;
5149 continue;
5150 }
5151 }
5152
5153 switch (r_type)
5154 {
5155 case R_PPC_GOT_TLSLD16:
5156 case R_PPC_GOT_TLSLD16_LO:
5157 case R_PPC_GOT_TLSLD16_HI:
5158 case R_PPC_GOT_TLSLD16_HA:
5159 case R_PPC_GOT_TLSGD16:
5160 case R_PPC_GOT_TLSGD16_LO:
5161 case R_PPC_GOT_TLSGD16_HI:
5162 case R_PPC_GOT_TLSGD16_HA:
5163 case R_PPC_GOT_TPREL16:
5164 case R_PPC_GOT_TPREL16_LO:
5165 case R_PPC_GOT_TPREL16_HI:
5166 case R_PPC_GOT_TPREL16_HA:
5167 case R_PPC_GOT_DTPREL16:
5168 case R_PPC_GOT_DTPREL16_LO:
5169 case R_PPC_GOT_DTPREL16_HI:
5170 case R_PPC_GOT_DTPREL16_HA:
5171 case R_PPC_GOT16:
5172 case R_PPC_GOT16_LO:
5173 case R_PPC_GOT16_HI:
5174 case R_PPC_GOT16_HA:
5175 if (h != NULL)
5176 {
5177 if (h->got.refcount > 0)
5178 h->got.refcount--;
5179 if (!bfd_link_pic (info))
5180 {
5181 struct plt_entry *ent;
5182
5183 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5184 if (ent != NULL && ent->plt.refcount > 0)
5185 ent->plt.refcount -= 1;
5186 }
5187 }
5188 else if (local_got_refcounts != NULL)
5189 {
5190 if (local_got_refcounts[r_symndx] > 0)
5191 local_got_refcounts[r_symndx]--;
5192 }
5193 break;
5194
5195 case R_PPC_REL24:
5196 case R_PPC_REL14:
5197 case R_PPC_REL14_BRTAKEN:
5198 case R_PPC_REL14_BRNTAKEN:
5199 case R_PPC_REL32:
5200 if (h == NULL || h == htab->elf.hgot)
5201 break;
5202 /* Fall through. */
5203
5204 case R_PPC_ADDR32:
5205 case R_PPC_ADDR24:
5206 case R_PPC_ADDR16:
5207 case R_PPC_ADDR16_LO:
5208 case R_PPC_ADDR16_HI:
5209 case R_PPC_ADDR16_HA:
5210 case R_PPC_ADDR14:
5211 case R_PPC_ADDR14_BRTAKEN:
5212 case R_PPC_ADDR14_BRNTAKEN:
5213 case R_PPC_UADDR32:
5214 case R_PPC_UADDR16:
5215 if (bfd_link_pic (info))
5216 break;
5217 /* Fall through. */
5218
5219 case R_PPC_PLT32:
5220 case R_PPC_PLTREL24:
5221 case R_PPC_PLTREL32:
5222 case R_PPC_PLT16_LO:
5223 case R_PPC_PLT16_HI:
5224 case R_PPC_PLT16_HA:
5225 if (h != NULL)
5226 {
5227 bfd_vma addend = 0;
5228 struct plt_entry *ent;
5229
5230 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5231 addend = rel->r_addend;
5232 ent = find_plt_ent (&h->plt.plist, got2, addend);
5233 if (ent != NULL && ent->plt.refcount > 0)
5234 ent->plt.refcount -= 1;
5235 }
5236 break;
5237
5238 default:
5239 break;
5240 }
5241 }
5242 return TRUE;
5243 }
5244 \f
5245 /* Set plt output section type, htab->tls_get_addr, and call the
5246 generic ELF tls_setup function. */
5247
5248 asection *
5249 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5250 {
5251 struct ppc_elf_link_hash_table *htab;
5252
5253 htab = ppc_elf_hash_table (info);
5254 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5255 FALSE, FALSE, TRUE);
5256 if (htab->plt_type != PLT_NEW)
5257 htab->params->no_tls_get_addr_opt = TRUE;
5258
5259 if (!htab->params->no_tls_get_addr_opt)
5260 {
5261 struct elf_link_hash_entry *opt, *tga;
5262 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5263 FALSE, FALSE, TRUE);
5264 if (opt != NULL
5265 && (opt->root.type == bfd_link_hash_defined
5266 || opt->root.type == bfd_link_hash_defweak))
5267 {
5268 /* If glibc supports an optimized __tls_get_addr call stub,
5269 signalled by the presence of __tls_get_addr_opt, and we'll
5270 be calling __tls_get_addr via a plt call stub, then
5271 make __tls_get_addr point to __tls_get_addr_opt. */
5272 tga = htab->tls_get_addr;
5273 if (htab->elf.dynamic_sections_created
5274 && tga != NULL
5275 && (tga->type == STT_FUNC
5276 || tga->needs_plt)
5277 && !(SYMBOL_CALLS_LOCAL (info, tga)
5278 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5279 && tga->root.type == bfd_link_hash_undefweak)))
5280 {
5281 struct plt_entry *ent;
5282 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5283 if (ent->plt.refcount > 0)
5284 break;
5285 if (ent != NULL)
5286 {
5287 tga->root.type = bfd_link_hash_indirect;
5288 tga->root.u.i.link = &opt->root;
5289 ppc_elf_copy_indirect_symbol (info, opt, tga);
5290 opt->mark = 1;
5291 if (opt->dynindx != -1)
5292 {
5293 /* Use __tls_get_addr_opt in dynamic relocations. */
5294 opt->dynindx = -1;
5295 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5296 opt->dynstr_index);
5297 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5298 return FALSE;
5299 }
5300 htab->tls_get_addr = opt;
5301 }
5302 }
5303 }
5304 else
5305 htab->params->no_tls_get_addr_opt = TRUE;
5306 }
5307 if (htab->plt_type == PLT_NEW
5308 && htab->elf.splt != NULL
5309 && htab->elf.splt->output_section != NULL)
5310 {
5311 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5312 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5313 }
5314
5315 return _bfd_elf_tls_setup (obfd, info);
5316 }
5317
5318 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5319 HASH. */
5320
5321 static bfd_boolean
5322 branch_reloc_hash_match (const bfd *ibfd,
5323 const Elf_Internal_Rela *rel,
5324 const struct elf_link_hash_entry *hash)
5325 {
5326 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5327 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5328 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5329
5330 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5331 {
5332 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5333 struct elf_link_hash_entry *h;
5334
5335 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5336 while (h->root.type == bfd_link_hash_indirect
5337 || h->root.type == bfd_link_hash_warning)
5338 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5339 if (h == hash)
5340 return TRUE;
5341 }
5342 return FALSE;
5343 }
5344
5345 /* Run through all the TLS relocs looking for optimization
5346 opportunities. */
5347
5348 bfd_boolean
5349 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5350 struct bfd_link_info *info)
5351 {
5352 bfd *ibfd;
5353 asection *sec;
5354 struct ppc_elf_link_hash_table *htab;
5355 int pass;
5356
5357 if (!bfd_link_executable (info))
5358 return TRUE;
5359
5360 htab = ppc_elf_hash_table (info);
5361 if (htab == NULL)
5362 return FALSE;
5363
5364 /* Make two passes through the relocs. First time check that tls
5365 relocs involved in setting up a tls_get_addr call are indeed
5366 followed by such a call. If they are not, don't do any tls
5367 optimization. On the second pass twiddle tls_mask flags to
5368 notify relocate_section that optimization can be done, and
5369 adjust got and plt refcounts. */
5370 for (pass = 0; pass < 2; ++pass)
5371 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5372 {
5373 Elf_Internal_Sym *locsyms = NULL;
5374 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5375 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5376
5377 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5378 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5379 {
5380 Elf_Internal_Rela *relstart, *rel, *relend;
5381 int expecting_tls_get_addr = 0;
5382
5383 /* Read the relocations. */
5384 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5385 info->keep_memory);
5386 if (relstart == NULL)
5387 return FALSE;
5388
5389 relend = relstart + sec->reloc_count;
5390 for (rel = relstart; rel < relend; rel++)
5391 {
5392 enum elf_ppc_reloc_type r_type;
5393 unsigned long r_symndx;
5394 struct elf_link_hash_entry *h = NULL;
5395 char *tls_mask;
5396 char tls_set, tls_clear;
5397 bfd_boolean is_local;
5398 bfd_signed_vma *got_count;
5399
5400 r_symndx = ELF32_R_SYM (rel->r_info);
5401 if (r_symndx >= symtab_hdr->sh_info)
5402 {
5403 struct elf_link_hash_entry **sym_hashes;
5404
5405 sym_hashes = elf_sym_hashes (ibfd);
5406 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5407 while (h->root.type == bfd_link_hash_indirect
5408 || h->root.type == bfd_link_hash_warning)
5409 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5410 }
5411
5412 is_local = FALSE;
5413 if (h == NULL
5414 || !h->def_dynamic)
5415 is_local = TRUE;
5416
5417 r_type = ELF32_R_TYPE (rel->r_info);
5418 /* If this section has old-style __tls_get_addr calls
5419 without marker relocs, then check that each
5420 __tls_get_addr call reloc is preceded by a reloc
5421 that conceivably belongs to the __tls_get_addr arg
5422 setup insn. If we don't find matching arg setup
5423 relocs, don't do any tls optimization. */
5424 if (pass == 0
5425 && sec->has_tls_get_addr_call
5426 && h != NULL
5427 && h == htab->tls_get_addr
5428 && !expecting_tls_get_addr
5429 && is_branch_reloc (r_type))
5430 {
5431 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5432 "TLS optimization disabled\n",
5433 ibfd, sec, rel->r_offset);
5434 if (elf_section_data (sec)->relocs != relstart)
5435 free (relstart);
5436 return TRUE;
5437 }
5438
5439 expecting_tls_get_addr = 0;
5440 switch (r_type)
5441 {
5442 case R_PPC_GOT_TLSLD16:
5443 case R_PPC_GOT_TLSLD16_LO:
5444 expecting_tls_get_addr = 1;
5445 /* Fall through. */
5446
5447 case R_PPC_GOT_TLSLD16_HI:
5448 case R_PPC_GOT_TLSLD16_HA:
5449 /* These relocs should never be against a symbol
5450 defined in a shared lib. Leave them alone if
5451 that turns out to be the case. */
5452 if (!is_local)
5453 continue;
5454
5455 /* LD -> LE */
5456 tls_set = 0;
5457 tls_clear = TLS_LD;
5458 break;
5459
5460 case R_PPC_GOT_TLSGD16:
5461 case R_PPC_GOT_TLSGD16_LO:
5462 expecting_tls_get_addr = 1;
5463 /* Fall through. */
5464
5465 case R_PPC_GOT_TLSGD16_HI:
5466 case R_PPC_GOT_TLSGD16_HA:
5467 if (is_local)
5468 /* GD -> LE */
5469 tls_set = 0;
5470 else
5471 /* GD -> IE */
5472 tls_set = TLS_TLS | TLS_TPRELGD;
5473 tls_clear = TLS_GD;
5474 break;
5475
5476 case R_PPC_GOT_TPREL16:
5477 case R_PPC_GOT_TPREL16_LO:
5478 case R_PPC_GOT_TPREL16_HI:
5479 case R_PPC_GOT_TPREL16_HA:
5480 if (is_local)
5481 {
5482 /* IE -> LE */
5483 tls_set = 0;
5484 tls_clear = TLS_TPREL;
5485 break;
5486 }
5487 else
5488 continue;
5489
5490 case R_PPC_TLSGD:
5491 case R_PPC_TLSLD:
5492 expecting_tls_get_addr = 2;
5493 tls_set = 0;
5494 tls_clear = 0;
5495 break;
5496
5497 default:
5498 continue;
5499 }
5500
5501 if (pass == 0)
5502 {
5503 if (!expecting_tls_get_addr
5504 || (expecting_tls_get_addr == 1
5505 && !sec->has_tls_get_addr_call))
5506 continue;
5507
5508 if (rel + 1 < relend
5509 && branch_reloc_hash_match (ibfd, rel + 1,
5510 htab->tls_get_addr))
5511 continue;
5512
5513 /* Uh oh, we didn't find the expected call. We
5514 could just mark this symbol to exclude it
5515 from tls optimization but it's safer to skip
5516 the entire optimization. */
5517 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5518 "TLS optimization disabled\n"),
5519 ibfd, sec, rel->r_offset);
5520 if (elf_section_data (sec)->relocs != relstart)
5521 free (relstart);
5522 return TRUE;
5523 }
5524
5525 if (expecting_tls_get_addr)
5526 {
5527 struct plt_entry *ent;
5528 bfd_vma addend = 0;
5529
5530 if (bfd_link_pic (info)
5531 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5532 addend = rel[1].r_addend;
5533 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5534 got2, addend);
5535 if (ent != NULL && ent->plt.refcount > 0)
5536 ent->plt.refcount -= 1;
5537
5538 if (expecting_tls_get_addr == 2)
5539 continue;
5540 }
5541
5542 if (h != NULL)
5543 {
5544 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5545 got_count = &h->got.refcount;
5546 }
5547 else
5548 {
5549 bfd_signed_vma *lgot_refs;
5550 struct plt_entry **local_plt;
5551 char *lgot_masks;
5552
5553 if (locsyms == NULL)
5554 {
5555 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5556 if (locsyms == NULL)
5557 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5558 symtab_hdr->sh_info,
5559 0, NULL, NULL, NULL);
5560 if (locsyms == NULL)
5561 {
5562 if (elf_section_data (sec)->relocs != relstart)
5563 free (relstart);
5564 return FALSE;
5565 }
5566 }
5567 lgot_refs = elf_local_got_refcounts (ibfd);
5568 if (lgot_refs == NULL)
5569 abort ();
5570 local_plt = (struct plt_entry **)
5571 (lgot_refs + symtab_hdr->sh_info);
5572 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5573 tls_mask = &lgot_masks[r_symndx];
5574 got_count = &lgot_refs[r_symndx];
5575 }
5576
5577 if (tls_set == 0)
5578 {
5579 /* We managed to get rid of a got entry. */
5580 if (*got_count > 0)
5581 *got_count -= 1;
5582 }
5583
5584 *tls_mask |= tls_set;
5585 *tls_mask &= ~tls_clear;
5586 }
5587
5588 if (elf_section_data (sec)->relocs != relstart)
5589 free (relstart);
5590 }
5591
5592 if (locsyms != NULL
5593 && (symtab_hdr->contents != (unsigned char *) locsyms))
5594 {
5595 if (!info->keep_memory)
5596 free (locsyms);
5597 else
5598 symtab_hdr->contents = (unsigned char *) locsyms;
5599 }
5600 }
5601 return TRUE;
5602 }
5603 \f
5604 /* Return true if we have dynamic relocs that apply to read-only sections. */
5605
5606 static bfd_boolean
5607 readonly_dynrelocs (struct elf_link_hash_entry *h)
5608 {
5609 struct elf_dyn_relocs *p;
5610
5611 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5612 {
5613 asection *s = p->sec->output_section;
5614
5615 if (s != NULL
5616 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5617 == (SEC_READONLY | SEC_ALLOC)))
5618 return TRUE;
5619 }
5620 return FALSE;
5621 }
5622
5623 /* Adjust a symbol defined by a dynamic object and referenced by a
5624 regular object. The current definition is in some section of the
5625 dynamic object, but we're not including those sections. We have to
5626 change the definition to something the rest of the link can
5627 understand. */
5628
5629 static bfd_boolean
5630 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5631 struct elf_link_hash_entry *h)
5632 {
5633 struct ppc_elf_link_hash_table *htab;
5634 asection *s;
5635
5636 #ifdef DEBUG
5637 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5638 h->root.root.string);
5639 #endif
5640
5641 /* Make sure we know what is going on here. */
5642 htab = ppc_elf_hash_table (info);
5643 BFD_ASSERT (htab->elf.dynobj != NULL
5644 && (h->needs_plt
5645 || h->type == STT_GNU_IFUNC
5646 || h->u.weakdef != NULL
5647 || (h->def_dynamic
5648 && h->ref_regular
5649 && !h->def_regular)));
5650
5651 /* Deal with function syms. */
5652 if (h->type == STT_FUNC
5653 || h->type == STT_GNU_IFUNC
5654 || h->needs_plt)
5655 {
5656 /* Clear procedure linkage table information for any symbol that
5657 won't need a .plt entry. */
5658 struct plt_entry *ent;
5659 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5660 if (ent->plt.refcount > 0)
5661 break;
5662 if (ent == NULL
5663 || (h->type != STT_GNU_IFUNC
5664 && (SYMBOL_CALLS_LOCAL (info, h)
5665 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5666 && h->root.type == bfd_link_hash_undefweak))))
5667 {
5668 /* A PLT entry is not required/allowed when:
5669
5670 1. We are not using ld.so; because then the PLT entry
5671 can't be set up, so we can't use one. In this case,
5672 ppc_elf_adjust_dynamic_symbol won't even be called.
5673
5674 2. GC has rendered the entry unused.
5675
5676 3. We know for certain that a call to this symbol
5677 will go to this object, or will remain undefined. */
5678 h->plt.plist = NULL;
5679 h->needs_plt = 0;
5680 h->pointer_equality_needed = 0;
5681 }
5682 else
5683 {
5684 /* Taking a function's address in a read/write section
5685 doesn't require us to define the function symbol in the
5686 executable on a plt call stub. A dynamic reloc can
5687 be used instead, giving better runtime performance.
5688 (Calls via that function pointer don't need to bounce
5689 through the plt call stub.) Similarly, use a dynamic
5690 reloc for a weak reference when possible, allowing the
5691 resolution of the symbol to be set at load time rather
5692 than link time. */
5693 if ((h->pointer_equality_needed
5694 || (!h->ref_regular_nonweak && h->non_got_ref))
5695 && !htab->is_vxworks
5696 && !ppc_elf_hash_entry (h)->has_sda_refs
5697 && !readonly_dynrelocs (h))
5698 {
5699 h->pointer_equality_needed = 0;
5700 /* After adjust_dynamic_symbol, non_got_ref set in the
5701 non-pic case means that dyn_relocs for this symbol
5702 should be discarded. */
5703 h->non_got_ref = 0;
5704 }
5705 }
5706 h->protected_def = 0;
5707 return TRUE;
5708 }
5709 else
5710 h->plt.plist = NULL;
5711
5712 /* If this is a weak symbol, and there is a real definition, the
5713 processor independent code will have arranged for us to see the
5714 real definition first, and we can just use the same value. */
5715 if (h->u.weakdef != NULL)
5716 {
5717 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5718 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5719 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5720 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5721 if (ELIMINATE_COPY_RELOCS)
5722 h->non_got_ref = h->u.weakdef->non_got_ref;
5723 return TRUE;
5724 }
5725
5726 /* This is a reference to a symbol defined by a dynamic object which
5727 is not a function. */
5728
5729 /* If we are creating a shared library, we must presume that the
5730 only references to the symbol are via the global offset table.
5731 For such cases we need not do anything here; the relocations will
5732 be handled correctly by relocate_section. */
5733 if (bfd_link_pic (info))
5734 {
5735 h->protected_def = 0;
5736 return TRUE;
5737 }
5738
5739 /* If there are no references to this symbol that do not use the
5740 GOT, we don't need to generate a copy reloc. */
5741 if (!h->non_got_ref)
5742 {
5743 h->protected_def = 0;
5744 return TRUE;
5745 }
5746
5747 /* Protected variables do not work with .dynbss. The copy in
5748 .dynbss won't be used by the shared library with the protected
5749 definition for the variable. Editing to PIC, or text relocations
5750 are preferable to an incorrect program. */
5751 if (h->protected_def)
5752 {
5753 if (ELIMINATE_COPY_RELOCS
5754 && ppc_elf_hash_entry (h)->has_addr16_ha
5755 && ppc_elf_hash_entry (h)->has_addr16_lo
5756 && htab->params->pic_fixup == 0
5757 && info->disable_target_specific_optimizations <= 1)
5758 htab->params->pic_fixup = 1;
5759 h->non_got_ref = 0;
5760 return TRUE;
5761 }
5762
5763 /* If -z nocopyreloc was given, we won't generate them either. */
5764 if (info->nocopyreloc)
5765 {
5766 h->non_got_ref = 0;
5767 return TRUE;
5768 }
5769
5770 /* If we didn't find any dynamic relocs in read-only sections, then
5771 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5772 We can't do this if there are any small data relocations. This
5773 doesn't work on VxWorks, where we can not have dynamic
5774 relocations (other than copy and jump slot relocations) in an
5775 executable. */
5776 if (ELIMINATE_COPY_RELOCS
5777 && !ppc_elf_hash_entry (h)->has_sda_refs
5778 && !htab->is_vxworks
5779 && !h->def_regular
5780 && !readonly_dynrelocs (h))
5781 {
5782 h->non_got_ref = 0;
5783 return TRUE;
5784 }
5785
5786 /* We must allocate the symbol in our .dynbss section, which will
5787 become part of the .bss section of the executable. There will be
5788 an entry for this symbol in the .dynsym section. The dynamic
5789 object will contain position independent code, so all references
5790 from the dynamic object to this symbol will go through the global
5791 offset table. The dynamic linker will use the .dynsym entry to
5792 determine the address it must put in the global offset table, so
5793 both the dynamic object and the regular object will refer to the
5794 same memory location for the variable.
5795
5796 Of course, if the symbol is referenced using SDAREL relocs, we
5797 must instead allocate it in .sbss. */
5798
5799 if (ppc_elf_hash_entry (h)->has_sda_refs)
5800 s = htab->dynsbss;
5801 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5802 s = htab->elf.sdynrelro;
5803 else
5804 s = htab->elf.sdynbss;
5805 BFD_ASSERT (s != NULL);
5806
5807 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5808 copy the initial value out of the dynamic object and into the
5809 runtime process image. We need to remember the offset into the
5810 .rela.bss section we are going to use. */
5811 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5812 {
5813 asection *srel;
5814
5815 if (ppc_elf_hash_entry (h)->has_sda_refs)
5816 srel = htab->relsbss;
5817 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5818 srel = htab->elf.sreldynrelro;
5819 else
5820 srel = htab->elf.srelbss;
5821 BFD_ASSERT (srel != NULL);
5822 srel->size += sizeof (Elf32_External_Rela);
5823 h->needs_copy = 1;
5824 }
5825
5826 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5827 }
5828 \f
5829 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5830 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5831 specifying the addend on the plt relocation. For -fpic code, the sym
5832 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5833 xxxxxxxx.got2.plt_pic32.<callee>. */
5834
5835 static bfd_boolean
5836 add_stub_sym (struct plt_entry *ent,
5837 struct elf_link_hash_entry *h,
5838 struct bfd_link_info *info)
5839 {
5840 struct elf_link_hash_entry *sh;
5841 size_t len1, len2, len3;
5842 char *name;
5843 const char *stub;
5844 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5845
5846 if (bfd_link_pic (info))
5847 stub = ".plt_pic32.";
5848 else
5849 stub = ".plt_call32.";
5850
5851 len1 = strlen (h->root.root.string);
5852 len2 = strlen (stub);
5853 len3 = 0;
5854 if (ent->sec)
5855 len3 = strlen (ent->sec->name);
5856 name = bfd_malloc (len1 + len2 + len3 + 9);
5857 if (name == NULL)
5858 return FALSE;
5859 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5860 if (ent->sec)
5861 memcpy (name + 8, ent->sec->name, len3);
5862 memcpy (name + 8 + len3, stub, len2);
5863 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5864 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5865 if (sh == NULL)
5866 return FALSE;
5867 if (sh->root.type == bfd_link_hash_new)
5868 {
5869 sh->root.type = bfd_link_hash_defined;
5870 sh->root.u.def.section = htab->glink;
5871 sh->root.u.def.value = ent->glink_offset;
5872 sh->ref_regular = 1;
5873 sh->def_regular = 1;
5874 sh->ref_regular_nonweak = 1;
5875 sh->forced_local = 1;
5876 sh->non_elf = 0;
5877 sh->root.linker_def = 1;
5878 }
5879 return TRUE;
5880 }
5881
5882 /* Allocate NEED contiguous space in .got, and return the offset.
5883 Handles allocation of the got header when crossing 32k. */
5884
5885 static bfd_vma
5886 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5887 {
5888 bfd_vma where;
5889 unsigned int max_before_header;
5890
5891 if (htab->plt_type == PLT_VXWORKS)
5892 {
5893 where = htab->elf.sgot->size;
5894 htab->elf.sgot->size += need;
5895 }
5896 else
5897 {
5898 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5899 if (need <= htab->got_gap)
5900 {
5901 where = max_before_header - htab->got_gap;
5902 htab->got_gap -= need;
5903 }
5904 else
5905 {
5906 if (htab->elf.sgot->size + need > max_before_header
5907 && htab->elf.sgot->size <= max_before_header)
5908 {
5909 htab->got_gap = max_before_header - htab->elf.sgot->size;
5910 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5911 }
5912 where = htab->elf.sgot->size;
5913 htab->elf.sgot->size += need;
5914 }
5915 }
5916 return where;
5917 }
5918
5919 /* If H is undefined weak, make it dynamic if that makes sense. */
5920
5921 static bfd_boolean
5922 ensure_undefweak_dynamic (struct bfd_link_info *info,
5923 struct elf_link_hash_entry *h)
5924 {
5925 struct elf_link_hash_table *htab = elf_hash_table (info);
5926
5927 if (htab->dynamic_sections_created
5928 && h->root.type == bfd_link_hash_undefweak
5929 && h->dynindx == -1
5930 && !h->forced_local
5931 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5932 return bfd_elf_link_record_dynamic_symbol (info, h);
5933 return TRUE;
5934 }
5935
5936 /* Allocate space in associated reloc sections for dynamic relocs. */
5937
5938 static bfd_boolean
5939 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5940 {
5941 struct bfd_link_info *info = inf;
5942 struct ppc_elf_link_hash_entry *eh;
5943 struct ppc_elf_link_hash_table *htab;
5944 struct elf_dyn_relocs *p;
5945 bfd_boolean dyn;
5946
5947 if (h->root.type == bfd_link_hash_indirect)
5948 return TRUE;
5949
5950 htab = ppc_elf_hash_table (info);
5951 eh = (struct ppc_elf_link_hash_entry *) h;
5952 if (eh->elf.got.refcount > 0
5953 || (ELIMINATE_COPY_RELOCS
5954 && !eh->elf.def_regular
5955 && eh->elf.protected_def
5956 && eh->has_addr16_ha
5957 && eh->has_addr16_lo
5958 && htab->params->pic_fixup > 0))
5959 {
5960 unsigned int need;
5961
5962 /* Make sure this symbol is output as a dynamic symbol.
5963 Undefined weak syms won't yet be marked as dynamic. */
5964 if (!ensure_undefweak_dynamic (info, &eh->elf))
5965 return FALSE;
5966
5967 need = 0;
5968 if ((eh->tls_mask & TLS_TLS) != 0)
5969 {
5970 if ((eh->tls_mask & TLS_LD) != 0)
5971 {
5972 if (!eh->elf.def_dynamic)
5973 /* We'll just use htab->tlsld_got.offset. This should
5974 always be the case. It's a little odd if we have
5975 a local dynamic reloc against a non-local symbol. */
5976 htab->tlsld_got.refcount += 1;
5977 else
5978 need += 8;
5979 }
5980 if ((eh->tls_mask & TLS_GD) != 0)
5981 need += 8;
5982 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5983 need += 4;
5984 if ((eh->tls_mask & TLS_DTPREL) != 0)
5985 need += 4;
5986 }
5987 else
5988 need += 4;
5989 if (need == 0)
5990 eh->elf.got.offset = (bfd_vma) -1;
5991 else
5992 {
5993 eh->elf.got.offset = allocate_got (htab, need);
5994 if ((bfd_link_pic (info)
5995 || (htab->elf.dynamic_sections_created
5996 && eh->elf.dynindx != -1
5997 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5998 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5999 || eh->elf.root.type != bfd_link_hash_undefweak))
6000 {
6001 asection *rsec = htab->elf.srelgot;
6002
6003 if (eh->elf.type == STT_GNU_IFUNC)
6004 rsec = htab->elf.irelplt;
6005 /* All the entries we allocated need relocs.
6006 Except LD only needs one. */
6007 if ((eh->tls_mask & TLS_LD) != 0
6008 && eh->elf.def_dynamic)
6009 need -= 4;
6010 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6011 }
6012 }
6013 }
6014 else
6015 eh->elf.got.offset = (bfd_vma) -1;
6016
6017 if (!htab->elf.dynamic_sections_created
6018 && h->type != STT_GNU_IFUNC)
6019 eh->dyn_relocs = NULL;
6020
6021 if (eh->dyn_relocs == NULL)
6022 ;
6023
6024 /* In the shared -Bsymbolic case, discard space allocated for
6025 dynamic pc-relative relocs against symbols which turn out to be
6026 defined in regular objects. For the normal shared case, discard
6027 space for relocs that have become local due to symbol visibility
6028 changes. */
6029 else if (bfd_link_pic (info))
6030 {
6031 /* Relocs that use pc_count are those that appear on a call insn,
6032 or certain REL relocs (see must_be_dyn_reloc) that can be
6033 generated via assembly. We want calls to protected symbols to
6034 resolve directly to the function rather than going via the plt.
6035 If people want function pointer comparisons to work as expected
6036 then they should avoid writing weird assembly. */
6037 if (SYMBOL_CALLS_LOCAL (info, h))
6038 {
6039 struct elf_dyn_relocs **pp;
6040
6041 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6042 {
6043 p->count -= p->pc_count;
6044 p->pc_count = 0;
6045 if (p->count == 0)
6046 *pp = p->next;
6047 else
6048 pp = &p->next;
6049 }
6050 }
6051
6052 if (htab->is_vxworks)
6053 {
6054 struct elf_dyn_relocs **pp;
6055
6056 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6057 {
6058 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6059 *pp = p->next;
6060 else
6061 pp = &p->next;
6062 }
6063 }
6064
6065 /* Discard relocs on undefined symbols that must be local. */
6066 if (eh->dyn_relocs != NULL
6067 && h->root.type == bfd_link_hash_undefined
6068 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6069 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6070 eh->dyn_relocs = NULL;
6071
6072 /* Also discard relocs on undefined weak syms with non-default
6073 visibility. */
6074 if (eh->dyn_relocs != NULL
6075 && h->root.type == bfd_link_hash_undefweak)
6076 {
6077 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6078 eh->dyn_relocs = NULL;
6079
6080 /* Make sure undefined weak symbols are output as a dynamic
6081 symbol in PIEs. */
6082 else if (!ensure_undefweak_dynamic (info, h))
6083 return FALSE;
6084 }
6085 }
6086 else if (ELIMINATE_COPY_RELOCS)
6087 {
6088 /* For the non-pic case, discard space for relocs against
6089 symbols which turn out to need copy relocs or are not
6090 dynamic. */
6091 if (!h->non_got_ref
6092 && !h->def_regular
6093 && !(h->protected_def
6094 && eh->has_addr16_ha
6095 && eh->has_addr16_lo
6096 && htab->params->pic_fixup > 0))
6097 {
6098 /* Make sure this symbol is output as a dynamic symbol.
6099 Undefined weak syms won't yet be marked as dynamic. */
6100 if (!ensure_undefweak_dynamic (info, h))
6101 return FALSE;
6102
6103 if (h->dynindx == -1)
6104 eh->dyn_relocs = NULL;
6105 }
6106 else
6107 eh->dyn_relocs = NULL;
6108 }
6109
6110 /* Allocate space. */
6111 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6112 {
6113 asection *sreloc = elf_section_data (p->sec)->sreloc;
6114 if (eh->elf.type == STT_GNU_IFUNC)
6115 sreloc = htab->elf.irelplt;
6116 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6117 }
6118
6119 /* Handle PLT relocs. Done last, after dynindx has settled. */
6120 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6121 if (dyn || h->type == STT_GNU_IFUNC)
6122 {
6123 struct plt_entry *ent;
6124 bfd_boolean doneone = FALSE;
6125 bfd_vma plt_offset = 0, glink_offset = 0;
6126
6127 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6128 if (ent->plt.refcount > 0)
6129 {
6130 asection *s = htab->elf.splt;
6131
6132 if (!dyn)
6133 s = htab->elf.iplt;
6134
6135 if (htab->plt_type == PLT_NEW || !dyn)
6136 {
6137 if (!doneone)
6138 {
6139 plt_offset = s->size;
6140 s->size += 4;
6141 }
6142 ent->plt.offset = plt_offset;
6143
6144 s = htab->glink;
6145 if (!doneone || bfd_link_pic (info))
6146 {
6147 glink_offset = s->size;
6148 s->size += GLINK_ENTRY_SIZE;
6149 if (h == htab->tls_get_addr
6150 && !htab->params->no_tls_get_addr_opt)
6151 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6152 }
6153 if (!doneone
6154 && !bfd_link_pic (info)
6155 && h->def_dynamic
6156 && !h->def_regular)
6157 {
6158 h->root.u.def.section = s;
6159 h->root.u.def.value = glink_offset;
6160 }
6161 ent->glink_offset = glink_offset;
6162
6163 if (htab->params->emit_stub_syms
6164 && !add_stub_sym (ent, h, info))
6165 return FALSE;
6166 }
6167 else
6168 {
6169 if (!doneone)
6170 {
6171 /* If this is the first .plt entry, make room
6172 for the special first entry. */
6173 if (s->size == 0)
6174 s->size += htab->plt_initial_entry_size;
6175
6176 /* The PowerPC PLT is actually composed of two
6177 parts, the first part is 2 words (for a load
6178 and a jump), and then there is a remaining
6179 word available at the end. */
6180 plt_offset = (htab->plt_initial_entry_size
6181 + (htab->plt_slot_size
6182 * ((s->size
6183 - htab->plt_initial_entry_size)
6184 / htab->plt_entry_size)));
6185
6186 /* If this symbol is not defined in a regular
6187 file, and we are not generating a shared
6188 library, then set the symbol to this location
6189 in the .plt. This is to avoid text
6190 relocations, and is required to make
6191 function pointers compare as equal between
6192 the normal executable and the shared library. */
6193 if (! bfd_link_pic (info)
6194 && h->def_dynamic
6195 && !h->def_regular)
6196 {
6197 h->root.u.def.section = s;
6198 h->root.u.def.value = plt_offset;
6199 }
6200
6201 /* Make room for this entry. */
6202 s->size += htab->plt_entry_size;
6203 /* After the 8192nd entry, room for two entries
6204 is allocated. */
6205 if (htab->plt_type == PLT_OLD
6206 && (s->size - htab->plt_initial_entry_size)
6207 / htab->plt_entry_size
6208 > PLT_NUM_SINGLE_ENTRIES)
6209 s->size += htab->plt_entry_size;
6210 }
6211 ent->plt.offset = plt_offset;
6212 }
6213
6214 /* We also need to make an entry in the .rela.plt section. */
6215 if (!doneone)
6216 {
6217 if (!dyn)
6218 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6219 else
6220 {
6221 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6222
6223 if (htab->plt_type == PLT_VXWORKS)
6224 {
6225 /* Allocate space for the unloaded relocations. */
6226 if (!bfd_link_pic (info)
6227 && htab->elf.dynamic_sections_created)
6228 {
6229 if (ent->plt.offset
6230 == (bfd_vma) htab->plt_initial_entry_size)
6231 {
6232 htab->srelplt2->size
6233 += (sizeof (Elf32_External_Rela)
6234 * VXWORKS_PLTRESOLVE_RELOCS);
6235 }
6236
6237 htab->srelplt2->size
6238 += (sizeof (Elf32_External_Rela)
6239 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6240 }
6241
6242 /* Every PLT entry has an associated GOT entry in
6243 .got.plt. */
6244 htab->elf.sgotplt->size += 4;
6245 }
6246 }
6247 doneone = TRUE;
6248 }
6249 }
6250 else
6251 ent->plt.offset = (bfd_vma) -1;
6252
6253 if (!doneone)
6254 {
6255 h->plt.plist = NULL;
6256 h->needs_plt = 0;
6257 }
6258 }
6259 else
6260 {
6261 h->plt.plist = NULL;
6262 h->needs_plt = 0;
6263 }
6264
6265 return TRUE;
6266 }
6267
6268 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6269 read-only sections. */
6270
6271 static bfd_boolean
6272 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6273 {
6274 if (h->root.type == bfd_link_hash_indirect)
6275 return TRUE;
6276
6277 if (readonly_dynrelocs (h))
6278 {
6279 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6280
6281 /* Not an error, just cut short the traversal. */
6282 return FALSE;
6283 }
6284 return TRUE;
6285 }
6286
6287 static const unsigned char glink_eh_frame_cie[] =
6288 {
6289 0, 0, 0, 16, /* length. */
6290 0, 0, 0, 0, /* id. */
6291 1, /* CIE version. */
6292 'z', 'R', 0, /* Augmentation string. */
6293 4, /* Code alignment. */
6294 0x7c, /* Data alignment. */
6295 65, /* RA reg. */
6296 1, /* Augmentation size. */
6297 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6298 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6299 };
6300
6301 /* Set the sizes of the dynamic sections. */
6302
6303 static bfd_boolean
6304 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6305 struct bfd_link_info *info)
6306 {
6307 struct ppc_elf_link_hash_table *htab;
6308 asection *s;
6309 bfd_boolean relocs;
6310 bfd *ibfd;
6311
6312 #ifdef DEBUG
6313 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6314 #endif
6315
6316 htab = ppc_elf_hash_table (info);
6317 BFD_ASSERT (htab->elf.dynobj != NULL);
6318
6319 if (elf_hash_table (info)->dynamic_sections_created)
6320 {
6321 /* Set the contents of the .interp section to the interpreter. */
6322 if (bfd_link_executable (info) && !info->nointerp)
6323 {
6324 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6325 BFD_ASSERT (s != NULL);
6326 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6327 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6328 }
6329 }
6330
6331 if (htab->plt_type == PLT_OLD)
6332 htab->got_header_size = 16;
6333 else if (htab->plt_type == PLT_NEW)
6334 htab->got_header_size = 12;
6335
6336 /* Set up .got offsets for local syms, and space for local dynamic
6337 relocs. */
6338 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6339 {
6340 bfd_signed_vma *local_got;
6341 bfd_signed_vma *end_local_got;
6342 struct plt_entry **local_plt;
6343 struct plt_entry **end_local_plt;
6344 char *lgot_masks;
6345 bfd_size_type locsymcount;
6346 Elf_Internal_Shdr *symtab_hdr;
6347
6348 if (!is_ppc_elf (ibfd))
6349 continue;
6350
6351 for (s = ibfd->sections; s != NULL; s = s->next)
6352 {
6353 struct ppc_dyn_relocs *p;
6354
6355 for (p = ((struct ppc_dyn_relocs *)
6356 elf_section_data (s)->local_dynrel);
6357 p != NULL;
6358 p = p->next)
6359 {
6360 if (!bfd_is_abs_section (p->sec)
6361 && bfd_is_abs_section (p->sec->output_section))
6362 {
6363 /* Input section has been discarded, either because
6364 it is a copy of a linkonce section or due to
6365 linker script /DISCARD/, so we'll be discarding
6366 the relocs too. */
6367 }
6368 else if (htab->is_vxworks
6369 && strcmp (p->sec->output_section->name,
6370 ".tls_vars") == 0)
6371 {
6372 /* Relocations in vxworks .tls_vars sections are
6373 handled specially by the loader. */
6374 }
6375 else if (p->count != 0)
6376 {
6377 asection *sreloc = elf_section_data (p->sec)->sreloc;
6378 if (p->ifunc)
6379 sreloc = htab->elf.irelplt;
6380 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6381 if ((p->sec->output_section->flags
6382 & (SEC_READONLY | SEC_ALLOC))
6383 == (SEC_READONLY | SEC_ALLOC))
6384 info->flags |= DF_TEXTREL;
6385 }
6386 }
6387 }
6388
6389 local_got = elf_local_got_refcounts (ibfd);
6390 if (!local_got)
6391 continue;
6392
6393 symtab_hdr = &elf_symtab_hdr (ibfd);
6394 locsymcount = symtab_hdr->sh_info;
6395 end_local_got = local_got + locsymcount;
6396 local_plt = (struct plt_entry **) end_local_got;
6397 end_local_plt = local_plt + locsymcount;
6398 lgot_masks = (char *) end_local_plt;
6399
6400 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6401 if (*local_got > 0)
6402 {
6403 unsigned int need = 0;
6404 if ((*lgot_masks & TLS_TLS) != 0)
6405 {
6406 if ((*lgot_masks & TLS_GD) != 0)
6407 need += 8;
6408 if ((*lgot_masks & TLS_LD) != 0)
6409 htab->tlsld_got.refcount += 1;
6410 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6411 need += 4;
6412 if ((*lgot_masks & TLS_DTPREL) != 0)
6413 need += 4;
6414 }
6415 else
6416 need += 4;
6417 if (need == 0)
6418 *local_got = (bfd_vma) -1;
6419 else
6420 {
6421 *local_got = allocate_got (htab, need);
6422 if (bfd_link_pic (info))
6423 {
6424 asection *srel = htab->elf.srelgot;
6425 if ((*lgot_masks & PLT_IFUNC) != 0)
6426 srel = htab->elf.irelplt;
6427 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6428 }
6429 }
6430 }
6431 else
6432 *local_got = (bfd_vma) -1;
6433
6434 if (htab->is_vxworks)
6435 continue;
6436
6437 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6438 for (; local_plt < end_local_plt; ++local_plt)
6439 {
6440 struct plt_entry *ent;
6441 bfd_boolean doneone = FALSE;
6442 bfd_vma plt_offset = 0, glink_offset = 0;
6443
6444 for (ent = *local_plt; ent != NULL; ent = ent->next)
6445 if (ent->plt.refcount > 0)
6446 {
6447 s = htab->elf.iplt;
6448
6449 if (!doneone)
6450 {
6451 plt_offset = s->size;
6452 s->size += 4;
6453 }
6454 ent->plt.offset = plt_offset;
6455
6456 s = htab->glink;
6457 if (!doneone || bfd_link_pic (info))
6458 {
6459 glink_offset = s->size;
6460 s->size += GLINK_ENTRY_SIZE;
6461 }
6462 ent->glink_offset = glink_offset;
6463
6464 if (!doneone)
6465 {
6466 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6467 doneone = TRUE;
6468 }
6469 }
6470 else
6471 ent->plt.offset = (bfd_vma) -1;
6472 }
6473 }
6474
6475 /* Allocate space for global sym dynamic relocs. */
6476 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6477
6478 if (htab->tlsld_got.refcount > 0)
6479 {
6480 htab->tlsld_got.offset = allocate_got (htab, 8);
6481 if (bfd_link_pic (info))
6482 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6483 }
6484 else
6485 htab->tlsld_got.offset = (bfd_vma) -1;
6486
6487 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6488 {
6489 unsigned int g_o_t = 32768;
6490
6491 /* If we haven't allocated the header, do so now. When we get here,
6492 for old plt/got the got size will be 0 to 32764 (not allocated),
6493 or 32780 to 65536 (header allocated). For new plt/got, the
6494 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6495 if (htab->elf.sgot->size <= 32768)
6496 {
6497 g_o_t = htab->elf.sgot->size;
6498 if (htab->plt_type == PLT_OLD)
6499 g_o_t += 4;
6500 htab->elf.sgot->size += htab->got_header_size;
6501 }
6502
6503 htab->elf.hgot->root.u.def.value = g_o_t;
6504 }
6505 if (bfd_link_pic (info))
6506 {
6507 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6508
6509 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6510 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6511 }
6512 if (info->emitrelocations)
6513 {
6514 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6515
6516 if (sda != NULL && sda->ref_regular)
6517 sda->root.u.def.section->flags |= SEC_KEEP;
6518 sda = htab->sdata[1].sym;
6519 if (sda != NULL && sda->ref_regular)
6520 sda->root.u.def.section->flags |= SEC_KEEP;
6521 }
6522
6523 if (htab->glink != NULL
6524 && htab->glink->size != 0
6525 && htab->elf.dynamic_sections_created)
6526 {
6527 htab->glink_pltresolve = htab->glink->size;
6528 /* Space for the branch table. ??? We don't need entries for
6529 non-dynamic symbols in this table. This case can arise with
6530 static ifuncs or forced local ifuncs. */
6531 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6532 /* Pad out to align the start of PLTresolve. */
6533 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6534 ? 63 : 15);
6535 htab->glink->size += GLINK_PLTRESOLVE;
6536
6537 if (htab->params->emit_stub_syms)
6538 {
6539 struct elf_link_hash_entry *sh;
6540 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6541 TRUE, FALSE, FALSE);
6542 if (sh == NULL)
6543 return FALSE;
6544 if (sh->root.type == bfd_link_hash_new)
6545 {
6546 sh->root.type = bfd_link_hash_defined;
6547 sh->root.u.def.section = htab->glink;
6548 sh->root.u.def.value = htab->glink_pltresolve;
6549 sh->ref_regular = 1;
6550 sh->def_regular = 1;
6551 sh->ref_regular_nonweak = 1;
6552 sh->forced_local = 1;
6553 sh->non_elf = 0;
6554 sh->root.linker_def = 1;
6555 }
6556 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6557 TRUE, FALSE, FALSE);
6558 if (sh == NULL)
6559 return FALSE;
6560 if (sh->root.type == bfd_link_hash_new)
6561 {
6562 sh->root.type = bfd_link_hash_defined;
6563 sh->root.u.def.section = htab->glink;
6564 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6565 sh->ref_regular = 1;
6566 sh->def_regular = 1;
6567 sh->ref_regular_nonweak = 1;
6568 sh->forced_local = 1;
6569 sh->non_elf = 0;
6570 sh->root.linker_def = 1;
6571 }
6572 }
6573 }
6574
6575 if (htab->glink != NULL
6576 && htab->glink->size != 0
6577 && htab->glink_eh_frame != NULL
6578 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6579 && _bfd_elf_eh_frame_present (info))
6580 {
6581 s = htab->glink_eh_frame;
6582 s->size = sizeof (glink_eh_frame_cie) + 20;
6583 if (bfd_link_pic (info))
6584 {
6585 s->size += 4;
6586 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6587 s->size += 4;
6588 }
6589 }
6590
6591 /* We've now determined the sizes of the various dynamic sections.
6592 Allocate memory for them. */
6593 relocs = FALSE;
6594 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6595 {
6596 bfd_boolean strip_section = TRUE;
6597
6598 if ((s->flags & SEC_LINKER_CREATED) == 0)
6599 continue;
6600
6601 if (s == htab->elf.splt
6602 || s == htab->elf.sgot)
6603 {
6604 /* We'd like to strip these sections if they aren't needed, but if
6605 we've exported dynamic symbols from them we must leave them.
6606 It's too late to tell BFD to get rid of the symbols. */
6607 if (htab->elf.hplt != NULL)
6608 strip_section = FALSE;
6609 /* Strip this section if we don't need it; see the
6610 comment below. */
6611 }
6612 else if (s == htab->elf.iplt
6613 || s == htab->glink
6614 || s == htab->glink_eh_frame
6615 || s == htab->elf.sgotplt
6616 || s == htab->sbss
6617 || s == htab->elf.sdynbss
6618 || s == htab->elf.sdynrelro
6619 || s == htab->dynsbss)
6620 {
6621 /* Strip these too. */
6622 }
6623 else if (s == htab->sdata[0].section
6624 || s == htab->sdata[1].section)
6625 {
6626 strip_section = (s->flags & SEC_KEEP) == 0;
6627 }
6628 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6629 ".rela"))
6630 {
6631 if (s->size != 0)
6632 {
6633 /* Remember whether there are any relocation sections. */
6634 relocs = TRUE;
6635
6636 /* We use the reloc_count field as a counter if we need
6637 to copy relocs into the output file. */
6638 s->reloc_count = 0;
6639 }
6640 }
6641 else
6642 {
6643 /* It's not one of our sections, so don't allocate space. */
6644 continue;
6645 }
6646
6647 if (s->size == 0 && strip_section)
6648 {
6649 /* If we don't need this section, strip it from the
6650 output file. This is mostly to handle .rela.bss and
6651 .rela.plt. We must create both sections in
6652 create_dynamic_sections, because they must be created
6653 before the linker maps input sections to output
6654 sections. The linker does that before
6655 adjust_dynamic_symbol is called, and it is that
6656 function which decides whether anything needs to go
6657 into these sections. */
6658 s->flags |= SEC_EXCLUDE;
6659 continue;
6660 }
6661
6662 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6663 continue;
6664
6665 /* Allocate memory for the section contents. */
6666 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6667 if (s->contents == NULL)
6668 return FALSE;
6669 }
6670
6671 if (htab->elf.dynamic_sections_created)
6672 {
6673 /* Add some entries to the .dynamic section. We fill in the
6674 values later, in ppc_elf_finish_dynamic_sections, but we
6675 must add the entries now so that we get the correct size for
6676 the .dynamic section. The DT_DEBUG entry is filled in by the
6677 dynamic linker and used by the debugger. */
6678 #define add_dynamic_entry(TAG, VAL) \
6679 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6680
6681 if (bfd_link_executable (info))
6682 {
6683 if (!add_dynamic_entry (DT_DEBUG, 0))
6684 return FALSE;
6685 }
6686
6687 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6688 {
6689 if (!add_dynamic_entry (DT_PLTGOT, 0)
6690 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6691 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6692 || !add_dynamic_entry (DT_JMPREL, 0))
6693 return FALSE;
6694 }
6695
6696 if (htab->plt_type == PLT_NEW
6697 && htab->glink != NULL
6698 && htab->glink->size != 0)
6699 {
6700 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6701 return FALSE;
6702 if (!htab->params->no_tls_get_addr_opt
6703 && htab->tls_get_addr != NULL
6704 && htab->tls_get_addr->plt.plist != NULL
6705 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6706 return FALSE;
6707 }
6708
6709 if (relocs)
6710 {
6711 if (!add_dynamic_entry (DT_RELA, 0)
6712 || !add_dynamic_entry (DT_RELASZ, 0)
6713 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6714 return FALSE;
6715 }
6716
6717 /* If any dynamic relocs apply to a read-only section, then we
6718 need a DT_TEXTREL entry. */
6719 if ((info->flags & DF_TEXTREL) == 0)
6720 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6721 info);
6722
6723 if ((info->flags & DF_TEXTREL) != 0)
6724 {
6725 if (!add_dynamic_entry (DT_TEXTREL, 0))
6726 return FALSE;
6727 }
6728 if (htab->is_vxworks
6729 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6730 return FALSE;
6731 }
6732 #undef add_dynamic_entry
6733
6734 if (htab->glink_eh_frame != NULL
6735 && htab->glink_eh_frame->contents != NULL)
6736 {
6737 unsigned char *p = htab->glink_eh_frame->contents;
6738 bfd_vma val;
6739
6740 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6741 /* CIE length (rewrite in case little-endian). */
6742 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6743 p += sizeof (glink_eh_frame_cie);
6744 /* FDE length. */
6745 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6746 bfd_put_32 (htab->elf.dynobj, val, p);
6747 p += 4;
6748 /* CIE pointer. */
6749 val = p - htab->glink_eh_frame->contents;
6750 bfd_put_32 (htab->elf.dynobj, val, p);
6751 p += 4;
6752 /* Offset to .glink. Set later. */
6753 p += 4;
6754 /* .glink size. */
6755 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6756 p += 4;
6757 /* Augmentation. */
6758 p += 1;
6759
6760 if (bfd_link_pic (info)
6761 && htab->elf.dynamic_sections_created)
6762 {
6763 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6764 if (adv < 64)
6765 *p++ = DW_CFA_advance_loc + adv;
6766 else if (adv < 256)
6767 {
6768 *p++ = DW_CFA_advance_loc1;
6769 *p++ = adv;
6770 }
6771 else if (adv < 65536)
6772 {
6773 *p++ = DW_CFA_advance_loc2;
6774 bfd_put_16 (htab->elf.dynobj, adv, p);
6775 p += 2;
6776 }
6777 else
6778 {
6779 *p++ = DW_CFA_advance_loc4;
6780 bfd_put_32 (htab->elf.dynobj, adv, p);
6781 p += 4;
6782 }
6783 *p++ = DW_CFA_register;
6784 *p++ = 65;
6785 p++;
6786 *p++ = DW_CFA_advance_loc + 4;
6787 *p++ = DW_CFA_restore_extended;
6788 *p++ = 65;
6789 }
6790 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6791 == htab->glink_eh_frame->size);
6792 }
6793
6794 return TRUE;
6795 }
6796
6797 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6798 if it looks like nothing is using them. */
6799
6800 static void
6801 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6802 {
6803 struct elf_link_hash_entry *sda = lsect->sym;
6804
6805 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6806 {
6807 asection *s;
6808
6809 s = bfd_get_section_by_name (output_bfd, lsect->name);
6810 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6811 {
6812 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6813 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6814 {
6815 sda->def_regular = 0;
6816 /* This is somewhat magic. See elf_link_output_extsym. */
6817 sda->ref_dynamic = 1;
6818 sda->forced_local = 0;
6819 }
6820 }
6821 }
6822 }
6823
6824 void
6825 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6826 {
6827 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6828
6829 if (htab != NULL)
6830 {
6831 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6832 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6833 }
6834 }
6835
6836
6837 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6838
6839 static bfd_boolean
6840 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6841 {
6842 if (h->plt.plist != NULL
6843 && !h->def_regular
6844 && (!h->pointer_equality_needed
6845 || !h->ref_regular_nonweak))
6846 return FALSE;
6847
6848 return _bfd_elf_hash_symbol (h);
6849 }
6850 \f
6851 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6852
6853 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6854 used for some functions that are allowed to break the ABI). */
6855 static const int shared_stub_entry[] =
6856 {
6857 0x7c0802a6, /* mflr 0 */
6858 0x429f0005, /* bcl 20, 31, .Lxxx */
6859 0x7d8802a6, /* mflr 12 */
6860 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6861 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6862 0x7c0803a6, /* mtlr 0 */
6863 0x7d8903a6, /* mtctr 12 */
6864 0x4e800420, /* bctr */
6865 };
6866
6867 static const int stub_entry[] =
6868 {
6869 0x3d800000, /* lis 12,xxx@ha */
6870 0x398c0000, /* addi 12,12,xxx@l */
6871 0x7d8903a6, /* mtctr 12 */
6872 0x4e800420, /* bctr */
6873 };
6874
6875 struct ppc_elf_relax_info
6876 {
6877 unsigned int workaround_size;
6878 unsigned int picfixup_size;
6879 };
6880
6881 /* This function implements long branch trampolines, and the ppc476
6882 icache bug workaround. Any section needing trampolines or patch
6883 space for the workaround has its size extended so that we can
6884 add trampolines at the end of the section. */
6885
6886 static bfd_boolean
6887 ppc_elf_relax_section (bfd *abfd,
6888 asection *isec,
6889 struct bfd_link_info *link_info,
6890 bfd_boolean *again)
6891 {
6892 struct one_branch_fixup
6893 {
6894 struct one_branch_fixup *next;
6895 asection *tsec;
6896 /* Final link, can use the symbol offset. For a
6897 relocatable link we use the symbol's index. */
6898 bfd_vma toff;
6899 bfd_vma trampoff;
6900 };
6901
6902 Elf_Internal_Shdr *symtab_hdr;
6903 bfd_byte *contents = NULL;
6904 Elf_Internal_Sym *isymbuf = NULL;
6905 Elf_Internal_Rela *internal_relocs = NULL;
6906 Elf_Internal_Rela *irel, *irelend = NULL;
6907 struct one_branch_fixup *branch_fixups = NULL;
6908 struct ppc_elf_relax_info *relax_info = NULL;
6909 unsigned changes = 0;
6910 bfd_boolean workaround_change;
6911 struct ppc_elf_link_hash_table *htab;
6912 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6913 asection *got2;
6914 bfd_boolean maybe_pasted;
6915
6916 *again = FALSE;
6917
6918 /* No need to do anything with non-alloc or non-code sections. */
6919 if ((isec->flags & SEC_ALLOC) == 0
6920 || (isec->flags & SEC_CODE) == 0
6921 || (isec->flags & SEC_LINKER_CREATED) != 0
6922 || isec->size < 4)
6923 return TRUE;
6924
6925 /* We cannot represent the required PIC relocs in the output, so don't
6926 do anything. The linker doesn't support mixing -shared and -r
6927 anyway. */
6928 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6929 return TRUE;
6930
6931 htab = ppc_elf_hash_table (link_info);
6932 if (htab == NULL)
6933 return TRUE;
6934
6935 isec->size = (isec->size + 3) & -4;
6936 if (isec->rawsize == 0)
6937 isec->rawsize = isec->size;
6938 trampbase = isec->size;
6939
6940 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6941 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6942 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6943
6944 if (htab->params->ppc476_workaround
6945 || htab->params->pic_fixup > 0)
6946 {
6947 if (elf_section_data (isec)->sec_info == NULL)
6948 {
6949 elf_section_data (isec)->sec_info
6950 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6951 if (elf_section_data (isec)->sec_info == NULL)
6952 return FALSE;
6953 }
6954 relax_info = elf_section_data (isec)->sec_info;
6955 trampbase -= relax_info->workaround_size;
6956 }
6957
6958 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6959 || strcmp (isec->output_section->name, ".fini") == 0);
6960 /* Space for a branch around any trampolines. */
6961 trampoff = trampbase;
6962 if (maybe_pasted && trampbase == isec->rawsize)
6963 trampoff += 4;
6964
6965 symtab_hdr = &elf_symtab_hdr (abfd);
6966 picfixup_size = 0;
6967 if (htab->params->branch_trampolines
6968 || htab->params->pic_fixup > 0)
6969 {
6970 /* Get a copy of the native relocations. */
6971 if (isec->reloc_count != 0)
6972 {
6973 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6974 link_info->keep_memory);
6975 if (internal_relocs == NULL)
6976 goto error_return;
6977 }
6978
6979 got2 = bfd_get_section_by_name (abfd, ".got2");
6980
6981 irelend = internal_relocs + isec->reloc_count;
6982 for (irel = internal_relocs; irel < irelend; irel++)
6983 {
6984 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6985 bfd_vma toff, roff;
6986 asection *tsec;
6987 struct one_branch_fixup *f;
6988 size_t insn_offset = 0;
6989 bfd_vma max_branch_offset = 0, val;
6990 bfd_byte *hit_addr;
6991 unsigned long t0;
6992 struct elf_link_hash_entry *h;
6993 struct plt_entry **plist;
6994 unsigned char sym_type;
6995
6996 switch (r_type)
6997 {
6998 case R_PPC_REL24:
6999 case R_PPC_LOCAL24PC:
7000 case R_PPC_PLTREL24:
7001 max_branch_offset = 1 << 25;
7002 break;
7003
7004 case R_PPC_REL14:
7005 case R_PPC_REL14_BRTAKEN:
7006 case R_PPC_REL14_BRNTAKEN:
7007 max_branch_offset = 1 << 15;
7008 break;
7009
7010 case R_PPC_ADDR16_HA:
7011 if (htab->params->pic_fixup > 0)
7012 break;
7013 continue;
7014
7015 default:
7016 continue;
7017 }
7018
7019 /* Get the value of the symbol referred to by the reloc. */
7020 h = NULL;
7021 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7022 {
7023 /* A local symbol. */
7024 Elf_Internal_Sym *isym;
7025
7026 /* Read this BFD's local symbols. */
7027 if (isymbuf == NULL)
7028 {
7029 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7030 if (isymbuf == NULL)
7031 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7032 symtab_hdr->sh_info, 0,
7033 NULL, NULL, NULL);
7034 if (isymbuf == 0)
7035 goto error_return;
7036 }
7037 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7038 if (isym->st_shndx == SHN_UNDEF)
7039 tsec = bfd_und_section_ptr;
7040 else if (isym->st_shndx == SHN_ABS)
7041 tsec = bfd_abs_section_ptr;
7042 else if (isym->st_shndx == SHN_COMMON)
7043 tsec = bfd_com_section_ptr;
7044 else
7045 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7046
7047 toff = isym->st_value;
7048 sym_type = ELF_ST_TYPE (isym->st_info);
7049 }
7050 else
7051 {
7052 /* Global symbol handling. */
7053 unsigned long indx;
7054
7055 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7056 h = elf_sym_hashes (abfd)[indx];
7057
7058 while (h->root.type == bfd_link_hash_indirect
7059 || h->root.type == bfd_link_hash_warning)
7060 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7061
7062 if (h->root.type == bfd_link_hash_defined
7063 || h->root.type == bfd_link_hash_defweak)
7064 {
7065 tsec = h->root.u.def.section;
7066 toff = h->root.u.def.value;
7067 }
7068 else if (h->root.type == bfd_link_hash_undefined
7069 || h->root.type == bfd_link_hash_undefweak)
7070 {
7071 tsec = bfd_und_section_ptr;
7072 toff = bfd_link_relocatable (link_info) ? indx : 0;
7073 }
7074 else
7075 continue;
7076
7077 /* If this branch is to __tls_get_addr then we may later
7078 optimise away the call. We won't be needing a long-
7079 branch stub in that case. */
7080 if (bfd_link_executable (link_info)
7081 && h == htab->tls_get_addr
7082 && irel != internal_relocs)
7083 {
7084 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7085 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7086 unsigned int tls_mask = 0;
7087
7088 /* The previous reloc should be one of R_PPC_TLSGD or
7089 R_PPC_TLSLD, or for older object files, a reloc
7090 on the __tls_get_addr arg setup insn. Get tls
7091 mask bits from the symbol on that reloc. */
7092 if (t_symndx < symtab_hdr->sh_info)
7093 {
7094 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7095
7096 if (local_got_offsets != NULL)
7097 {
7098 struct plt_entry **local_plt = (struct plt_entry **)
7099 (local_got_offsets + symtab_hdr->sh_info);
7100 char *lgot_masks = (char *)
7101 (local_plt + symtab_hdr->sh_info);
7102 tls_mask = lgot_masks[t_symndx];
7103 }
7104 }
7105 else
7106 {
7107 struct elf_link_hash_entry *th
7108 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7109
7110 while (th->root.type == bfd_link_hash_indirect
7111 || th->root.type == bfd_link_hash_warning)
7112 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7113
7114 tls_mask
7115 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7116 }
7117
7118 /* The mask bits tell us if the call will be
7119 optimised away. */
7120 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7121 && (t_rtype == R_PPC_TLSGD
7122 || t_rtype == R_PPC_GOT_TLSGD16
7123 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7124 continue;
7125 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7126 && (t_rtype == R_PPC_TLSLD
7127 || t_rtype == R_PPC_GOT_TLSLD16
7128 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7129 continue;
7130 }
7131
7132 sym_type = h->type;
7133 }
7134
7135 if (r_type == R_PPC_ADDR16_HA)
7136 {
7137 if (h != NULL
7138 && !h->def_regular
7139 && h->protected_def
7140 && ppc_elf_hash_entry (h)->has_addr16_ha
7141 && ppc_elf_hash_entry (h)->has_addr16_lo)
7142 picfixup_size += 12;
7143 continue;
7144 }
7145
7146 /* The condition here under which we call find_plt_ent must
7147 match that in relocate_section. If we call find_plt_ent here
7148 but not in relocate_section, or vice versa, then the branch
7149 destination used here may be incorrect. */
7150 plist = NULL;
7151 if (h != NULL)
7152 {
7153 /* We know is_branch_reloc (r_type) is true. */
7154 if (h->type == STT_GNU_IFUNC
7155 || r_type == R_PPC_PLTREL24)
7156 plist = &h->plt.plist;
7157 }
7158 else if (sym_type == STT_GNU_IFUNC
7159 && elf_local_got_offsets (abfd) != NULL)
7160 {
7161 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7162 struct plt_entry **local_plt = (struct plt_entry **)
7163 (local_got_offsets + symtab_hdr->sh_info);
7164 plist = local_plt + ELF32_R_SYM (irel->r_info);
7165 }
7166 if (plist != NULL)
7167 {
7168 bfd_vma addend = 0;
7169 struct plt_entry *ent;
7170
7171 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7172 addend = irel->r_addend;
7173 ent = find_plt_ent (plist, got2, addend);
7174 if (ent != NULL)
7175 {
7176 if (htab->plt_type == PLT_NEW
7177 || h == NULL
7178 || !htab->elf.dynamic_sections_created
7179 || h->dynindx == -1)
7180 {
7181 tsec = htab->glink;
7182 toff = ent->glink_offset;
7183 }
7184 else
7185 {
7186 tsec = htab->elf.splt;
7187 toff = ent->plt.offset;
7188 }
7189 }
7190 }
7191
7192 /* If the branch and target are in the same section, you have
7193 no hope of adding stubs. We'll error out later should the
7194 branch overflow. */
7195 if (tsec == isec)
7196 continue;
7197
7198 /* There probably isn't any reason to handle symbols in
7199 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7200 attribute for a code section, and we are only looking at
7201 branches. However, implement it correctly here as a
7202 reference for other target relax_section functions. */
7203 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7204 {
7205 /* At this stage in linking, no SEC_MERGE symbol has been
7206 adjusted, so all references to such symbols need to be
7207 passed through _bfd_merged_section_offset. (Later, in
7208 relocate_section, all SEC_MERGE symbols *except* for
7209 section symbols have been adjusted.)
7210
7211 gas may reduce relocations against symbols in SEC_MERGE
7212 sections to a relocation against the section symbol when
7213 the original addend was zero. When the reloc is against
7214 a section symbol we should include the addend in the
7215 offset passed to _bfd_merged_section_offset, since the
7216 location of interest is the original symbol. On the
7217 other hand, an access to "sym+addend" where "sym" is not
7218 a section symbol should not include the addend; Such an
7219 access is presumed to be an offset from "sym"; The
7220 location of interest is just "sym". */
7221 if (sym_type == STT_SECTION)
7222 toff += irel->r_addend;
7223
7224 toff
7225 = _bfd_merged_section_offset (abfd, &tsec,
7226 elf_section_data (tsec)->sec_info,
7227 toff);
7228
7229 if (sym_type != STT_SECTION)
7230 toff += irel->r_addend;
7231 }
7232 /* PLTREL24 addends are special. */
7233 else if (r_type != R_PPC_PLTREL24)
7234 toff += irel->r_addend;
7235
7236 /* Attempted -shared link of non-pic code loses. */
7237 if ((!bfd_link_relocatable (link_info)
7238 && tsec == bfd_und_section_ptr)
7239 || tsec->output_section == NULL
7240 || (tsec->owner != NULL
7241 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7242 continue;
7243
7244 roff = irel->r_offset;
7245
7246 /* If the branch is in range, no need to do anything. */
7247 if (tsec != bfd_und_section_ptr
7248 && (!bfd_link_relocatable (link_info)
7249 /* A relocatable link may have sections moved during
7250 final link, so do not presume they remain in range. */
7251 || tsec->output_section == isec->output_section))
7252 {
7253 bfd_vma symaddr, reladdr;
7254
7255 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7256 reladdr = isec->output_section->vma + isec->output_offset + roff;
7257 if (symaddr - reladdr + max_branch_offset
7258 < 2 * max_branch_offset)
7259 continue;
7260 }
7261
7262 /* Look for an existing fixup to this address. */
7263 for (f = branch_fixups; f ; f = f->next)
7264 if (f->tsec == tsec && f->toff == toff)
7265 break;
7266
7267 if (f == NULL)
7268 {
7269 size_t size;
7270 unsigned long stub_rtype;
7271
7272 val = trampoff - roff;
7273 if (val >= max_branch_offset)
7274 /* Oh dear, we can't reach a trampoline. Don't try to add
7275 one. We'll report an error later. */
7276 continue;
7277
7278 if (bfd_link_pic (link_info))
7279 {
7280 size = 4 * ARRAY_SIZE (shared_stub_entry);
7281 insn_offset = 12;
7282 }
7283 else
7284 {
7285 size = 4 * ARRAY_SIZE (stub_entry);
7286 insn_offset = 0;
7287 }
7288 stub_rtype = R_PPC_RELAX;
7289 if (tsec == htab->elf.splt
7290 || tsec == htab->glink)
7291 {
7292 stub_rtype = R_PPC_RELAX_PLT;
7293 if (r_type == R_PPC_PLTREL24)
7294 stub_rtype = R_PPC_RELAX_PLTREL24;
7295 }
7296
7297 /* Hijack the old relocation. Since we need two
7298 relocations for this use a "composite" reloc. */
7299 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7300 stub_rtype);
7301 irel->r_offset = trampoff + insn_offset;
7302 if (r_type == R_PPC_PLTREL24
7303 && stub_rtype != R_PPC_RELAX_PLTREL24)
7304 irel->r_addend = 0;
7305
7306 /* Record the fixup so we don't do it again this section. */
7307 f = bfd_malloc (sizeof (*f));
7308 f->next = branch_fixups;
7309 f->tsec = tsec;
7310 f->toff = toff;
7311 f->trampoff = trampoff;
7312 branch_fixups = f;
7313
7314 trampoff += size;
7315 changes++;
7316 }
7317 else
7318 {
7319 val = f->trampoff - roff;
7320 if (val >= max_branch_offset)
7321 continue;
7322
7323 /* Nop out the reloc, since we're finalizing things here. */
7324 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7325 }
7326
7327 /* Get the section contents. */
7328 if (contents == NULL)
7329 {
7330 /* Get cached copy if it exists. */
7331 if (elf_section_data (isec)->this_hdr.contents != NULL)
7332 contents = elf_section_data (isec)->this_hdr.contents;
7333 /* Go get them off disk. */
7334 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7335 goto error_return;
7336 }
7337
7338 /* Fix up the existing branch to hit the trampoline. */
7339 hit_addr = contents + roff;
7340 switch (r_type)
7341 {
7342 case R_PPC_REL24:
7343 case R_PPC_LOCAL24PC:
7344 case R_PPC_PLTREL24:
7345 t0 = bfd_get_32 (abfd, hit_addr);
7346 t0 &= ~0x3fffffc;
7347 t0 |= val & 0x3fffffc;
7348 bfd_put_32 (abfd, t0, hit_addr);
7349 break;
7350
7351 case R_PPC_REL14:
7352 case R_PPC_REL14_BRTAKEN:
7353 case R_PPC_REL14_BRNTAKEN:
7354 t0 = bfd_get_32 (abfd, hit_addr);
7355 t0 &= ~0xfffc;
7356 t0 |= val & 0xfffc;
7357 bfd_put_32 (abfd, t0, hit_addr);
7358 break;
7359 }
7360 }
7361
7362 while (branch_fixups != NULL)
7363 {
7364 struct one_branch_fixup *f = branch_fixups;
7365 branch_fixups = branch_fixups->next;
7366 free (f);
7367 }
7368 }
7369
7370 workaround_change = FALSE;
7371 newsize = trampoff;
7372 if (htab->params->ppc476_workaround
7373 && (!bfd_link_relocatable (link_info)
7374 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7375 {
7376 bfd_vma addr, end_addr;
7377 unsigned int crossings;
7378 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7379
7380 addr = isec->output_section->vma + isec->output_offset;
7381 end_addr = addr + trampoff;
7382 addr &= -pagesize;
7383 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7384 if (crossings != 0)
7385 {
7386 /* Keep space aligned, to ensure the patch code itself does
7387 not cross a page. Don't decrease size calculated on a
7388 previous pass as otherwise we might never settle on a layout. */
7389 newsize = 15 - ((end_addr - 1) & 15);
7390 newsize += crossings * 16;
7391 if (relax_info->workaround_size < newsize)
7392 {
7393 relax_info->workaround_size = newsize;
7394 workaround_change = TRUE;
7395 }
7396 /* Ensure relocate_section is called. */
7397 isec->flags |= SEC_RELOC;
7398 }
7399 newsize = trampoff + relax_info->workaround_size;
7400 }
7401
7402 if (htab->params->pic_fixup > 0)
7403 {
7404 picfixup_size -= relax_info->picfixup_size;
7405 if (picfixup_size != 0)
7406 relax_info->picfixup_size += picfixup_size;
7407 newsize += relax_info->picfixup_size;
7408 }
7409
7410 if (changes != 0 || picfixup_size != 0 || workaround_change)
7411 isec->size = newsize;
7412
7413 if (isymbuf != NULL
7414 && symtab_hdr->contents != (unsigned char *) isymbuf)
7415 {
7416 if (! link_info->keep_memory)
7417 free (isymbuf);
7418 else
7419 {
7420 /* Cache the symbols for elf_link_input_bfd. */
7421 symtab_hdr->contents = (unsigned char *) isymbuf;
7422 }
7423 }
7424
7425 if (contents != NULL
7426 && elf_section_data (isec)->this_hdr.contents != contents)
7427 {
7428 if (!changes && !link_info->keep_memory)
7429 free (contents);
7430 else
7431 {
7432 /* Cache the section contents for elf_link_input_bfd. */
7433 elf_section_data (isec)->this_hdr.contents = contents;
7434 }
7435 }
7436
7437 changes += picfixup_size;
7438 if (changes != 0)
7439 {
7440 /* Append sufficient NOP relocs so we can write out relocation
7441 information for the trampolines. */
7442 Elf_Internal_Shdr *rel_hdr;
7443 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7444 * sizeof (*new_relocs));
7445 unsigned ix;
7446
7447 if (!new_relocs)
7448 goto error_return;
7449 memcpy (new_relocs, internal_relocs,
7450 isec->reloc_count * sizeof (*new_relocs));
7451 for (ix = changes; ix--;)
7452 {
7453 irel = new_relocs + ix + isec->reloc_count;
7454
7455 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7456 }
7457 if (internal_relocs != elf_section_data (isec)->relocs)
7458 free (internal_relocs);
7459 elf_section_data (isec)->relocs = new_relocs;
7460 isec->reloc_count += changes;
7461 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7462 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7463 }
7464 else if (internal_relocs != NULL
7465 && elf_section_data (isec)->relocs != internal_relocs)
7466 free (internal_relocs);
7467
7468 *again = changes != 0 || workaround_change;
7469 return TRUE;
7470
7471 error_return:
7472 while (branch_fixups != NULL)
7473 {
7474 struct one_branch_fixup *f = branch_fixups;
7475 branch_fixups = branch_fixups->next;
7476 free (f);
7477 }
7478 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7479 free (isymbuf);
7480 if (contents != NULL
7481 && elf_section_data (isec)->this_hdr.contents != contents)
7482 free (contents);
7483 if (internal_relocs != NULL
7484 && elf_section_data (isec)->relocs != internal_relocs)
7485 free (internal_relocs);
7486 return FALSE;
7487 }
7488 \f
7489 /* What to do when ld finds relocations against symbols defined in
7490 discarded sections. */
7491
7492 static unsigned int
7493 ppc_elf_action_discarded (asection *sec)
7494 {
7495 if (strcmp (".fixup", sec->name) == 0)
7496 return 0;
7497
7498 if (strcmp (".got2", sec->name) == 0)
7499 return 0;
7500
7501 return _bfd_elf_default_action_discarded (sec);
7502 }
7503 \f
7504 /* Fill in the address for a pointer generated in a linker section. */
7505
7506 static bfd_vma
7507 elf_finish_pointer_linker_section (bfd *input_bfd,
7508 elf_linker_section_t *lsect,
7509 struct elf_link_hash_entry *h,
7510 bfd_vma relocation,
7511 const Elf_Internal_Rela *rel)
7512 {
7513 elf_linker_section_pointers_t *linker_section_ptr;
7514
7515 BFD_ASSERT (lsect != NULL);
7516
7517 if (h != NULL)
7518 {
7519 /* Handle global symbol. */
7520 struct ppc_elf_link_hash_entry *eh;
7521
7522 eh = (struct ppc_elf_link_hash_entry *) h;
7523 BFD_ASSERT (eh->elf.def_regular);
7524 linker_section_ptr = eh->linker_section_pointer;
7525 }
7526 else
7527 {
7528 /* Handle local symbol. */
7529 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7530
7531 BFD_ASSERT (is_ppc_elf (input_bfd));
7532 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7533 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7534 }
7535
7536 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7537 rel->r_addend,
7538 lsect);
7539 BFD_ASSERT (linker_section_ptr != NULL);
7540
7541 /* Offset will always be a multiple of four, so use the bottom bit
7542 as a "written" flag. */
7543 if ((linker_section_ptr->offset & 1) == 0)
7544 {
7545 bfd_put_32 (lsect->section->owner,
7546 relocation + linker_section_ptr->addend,
7547 lsect->section->contents + linker_section_ptr->offset);
7548 linker_section_ptr->offset += 1;
7549 }
7550
7551 relocation = (lsect->section->output_section->vma
7552 + lsect->section->output_offset
7553 + linker_section_ptr->offset - 1
7554 - SYM_VAL (lsect->sym));
7555
7556 #ifdef DEBUG
7557 fprintf (stderr,
7558 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7559 lsect->name, (long) relocation, (long) relocation);
7560 #endif
7561
7562 return relocation;
7563 }
7564
7565 #define PPC_LO(v) ((v) & 0xffff)
7566 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7567 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7568
7569 static void
7570 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7571 struct bfd_link_info *info)
7572 {
7573 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7574 bfd *output_bfd = info->output_bfd;
7575 bfd_vma plt;
7576
7577 plt = ((ent->plt.offset & ~1)
7578 + plt_sec->output_section->vma
7579 + plt_sec->output_offset);
7580
7581 if (bfd_link_pic (info))
7582 {
7583 bfd_vma got = 0;
7584
7585 if (ent->addend >= 32768)
7586 got = (ent->addend
7587 + ent->sec->output_section->vma
7588 + ent->sec->output_offset);
7589 else if (htab->elf.hgot != NULL)
7590 got = SYM_VAL (htab->elf.hgot);
7591
7592 plt -= got;
7593
7594 if (plt + 0x8000 < 0x10000)
7595 {
7596 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7597 p += 4;
7598 bfd_put_32 (output_bfd, MTCTR_11, p);
7599 p += 4;
7600 bfd_put_32 (output_bfd, BCTR, p);
7601 p += 4;
7602 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7603 p += 4;
7604 }
7605 else
7606 {
7607 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7608 p += 4;
7609 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7610 p += 4;
7611 bfd_put_32 (output_bfd, MTCTR_11, p);
7612 p += 4;
7613 bfd_put_32 (output_bfd, BCTR, p);
7614 p += 4;
7615 }
7616 }
7617 else
7618 {
7619 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7620 p += 4;
7621 bfd_put_32 (output_bfd, LWZ_11_11 + 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 }
7628 }
7629
7630 /* Return true if symbol is defined statically. */
7631
7632 static bfd_boolean
7633 is_static_defined (struct elf_link_hash_entry *h)
7634 {
7635 return ((h->root.type == bfd_link_hash_defined
7636 || h->root.type == bfd_link_hash_defweak)
7637 && h->root.u.def.section != NULL
7638 && h->root.u.def.section->output_section != NULL);
7639 }
7640
7641 /* If INSN is an opcode that may be used with an @tls operand, return
7642 the transformed insn for TLS optimisation, otherwise return 0. If
7643 REG is non-zero only match an insn with RB or RA equal to REG. */
7644
7645 unsigned int
7646 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7647 {
7648 unsigned int rtra;
7649
7650 if ((insn & (0x3f << 26)) != 31 << 26)
7651 return 0;
7652
7653 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7654 rtra = insn & ((1 << 26) - (1 << 16));
7655 else if (((insn >> 16) & 0x1f) == reg)
7656 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7657 else
7658 return 0;
7659
7660 if ((insn & (0x3ff << 1)) == 266 << 1)
7661 /* add -> addi. */
7662 insn = 14 << 26;
7663 else if ((insn & (0x1f << 1)) == 23 << 1
7664 && ((insn & (0x1f << 6)) < 14 << 6
7665 || ((insn & (0x1f << 6)) >= 16 << 6
7666 && (insn & (0x1f << 6)) < 24 << 6)))
7667 /* load and store indexed -> dform. */
7668 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7669 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7670 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7671 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7672 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7673 /* lwax -> lwa. */
7674 insn = (58 << 26) | 2;
7675 else
7676 return 0;
7677 insn |= rtra;
7678 return insn;
7679 }
7680
7681 /* If INSN is an opcode that may be used with an @tprel operand, return
7682 the transformed insn for an undefined weak symbol, ie. with the
7683 thread pointer REG operand removed. Otherwise return 0. */
7684
7685 unsigned int
7686 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7687 {
7688 if ((insn & (0x1f << 16)) == reg << 16
7689 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7690 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7691 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7692 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7693 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7694 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7695 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7696 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7697 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7698 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7699 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7700 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7701 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7702 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7703 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7704 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7705 && (insn & 3) != 1)
7706 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7707 && ((insn & 3) == 0 || (insn & 3) == 3))))
7708 {
7709 insn &= ~(0x1f << 16);
7710 }
7711 else if ((insn & (0x1f << 21)) == reg << 21
7712 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7713 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7714 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7715 {
7716 insn &= ~(0x1f << 21);
7717 insn |= (insn & (0x1f << 16)) << 5;
7718 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7719 insn -= 2 >> 26; /* convert to ori,oris */
7720 }
7721 else
7722 insn = 0;
7723 return insn;
7724 }
7725
7726 static bfd_boolean
7727 is_insn_ds_form (unsigned int insn)
7728 {
7729 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7730 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7731 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7732 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7733 }
7734
7735 static bfd_boolean
7736 is_insn_dq_form (unsigned int insn)
7737 {
7738 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7739 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7740 && (insn & 3) == 1));
7741 }
7742
7743 /* The RELOCATE_SECTION function is called by the ELF backend linker
7744 to handle the relocations for a section.
7745
7746 The relocs are always passed as Rela structures; if the section
7747 actually uses Rel structures, the r_addend field will always be
7748 zero.
7749
7750 This function is responsible for adjust the section contents as
7751 necessary, and (if using Rela relocs and generating a
7752 relocatable output file) adjusting the reloc addend as
7753 necessary.
7754
7755 This function does not have to worry about setting the reloc
7756 address or the reloc symbol index.
7757
7758 LOCAL_SYMS is a pointer to the swapped in local symbols.
7759
7760 LOCAL_SECTIONS is an array giving the section in the input file
7761 corresponding to the st_shndx field of each local symbol.
7762
7763 The global hash table entry for the global symbols can be found
7764 via elf_sym_hashes (input_bfd).
7765
7766 When generating relocatable output, this function must handle
7767 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7768 going to be the section symbol corresponding to the output
7769 section, which means that the addend must be adjusted
7770 accordingly. */
7771
7772 static bfd_boolean
7773 ppc_elf_relocate_section (bfd *output_bfd,
7774 struct bfd_link_info *info,
7775 bfd *input_bfd,
7776 asection *input_section,
7777 bfd_byte *contents,
7778 Elf_Internal_Rela *relocs,
7779 Elf_Internal_Sym *local_syms,
7780 asection **local_sections)
7781 {
7782 Elf_Internal_Shdr *symtab_hdr;
7783 struct elf_link_hash_entry **sym_hashes;
7784 struct ppc_elf_link_hash_table *htab;
7785 Elf_Internal_Rela *rel;
7786 Elf_Internal_Rela *wrel;
7787 Elf_Internal_Rela *relend;
7788 Elf_Internal_Rela outrel;
7789 asection *got2;
7790 bfd_vma *local_got_offsets;
7791 bfd_boolean ret = TRUE;
7792 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7793 bfd_boolean is_vxworks_tls;
7794 unsigned int picfixup_size = 0;
7795 struct ppc_elf_relax_info *relax_info = NULL;
7796
7797 #ifdef DEBUG
7798 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7799 "%ld relocations%s",
7800 input_bfd, input_section,
7801 (long) input_section->reloc_count,
7802 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7803 #endif
7804
7805 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7806
7807 /* Initialize howto table if not already done. */
7808 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7809 ppc_elf_howto_init ();
7810
7811 htab = ppc_elf_hash_table (info);
7812 local_got_offsets = elf_local_got_offsets (input_bfd);
7813 symtab_hdr = &elf_symtab_hdr (input_bfd);
7814 sym_hashes = elf_sym_hashes (input_bfd);
7815 /* We have to handle relocations in vxworks .tls_vars sections
7816 specially, because the dynamic loader is 'weird'. */
7817 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7818 && !strcmp (input_section->output_section->name,
7819 ".tls_vars"));
7820 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7821 relax_info = elf_section_data (input_section)->sec_info;
7822 rel = wrel = relocs;
7823 relend = relocs + input_section->reloc_count;
7824 for (; rel < relend; wrel++, rel++)
7825 {
7826 enum elf_ppc_reloc_type r_type;
7827 bfd_vma addend;
7828 bfd_reloc_status_type r;
7829 Elf_Internal_Sym *sym;
7830 asection *sec;
7831 struct elf_link_hash_entry *h;
7832 const char *sym_name;
7833 reloc_howto_type *howto;
7834 unsigned long r_symndx;
7835 bfd_vma relocation;
7836 bfd_vma branch_bit, from;
7837 bfd_boolean unresolved_reloc;
7838 bfd_boolean warned;
7839 unsigned int tls_type, tls_mask, tls_gd;
7840 struct plt_entry **ifunc;
7841 struct reloc_howto_struct alt_howto;
7842
7843 again:
7844 r_type = ELF32_R_TYPE (rel->r_info);
7845 sym = NULL;
7846 sec = NULL;
7847 h = NULL;
7848 unresolved_reloc = FALSE;
7849 warned = FALSE;
7850 r_symndx = ELF32_R_SYM (rel->r_info);
7851
7852 if (r_symndx < symtab_hdr->sh_info)
7853 {
7854 sym = local_syms + r_symndx;
7855 sec = local_sections[r_symndx];
7856 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7857
7858 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7859 }
7860 else
7861 {
7862 bfd_boolean ignored;
7863
7864 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7865 r_symndx, symtab_hdr, sym_hashes,
7866 h, sec, relocation,
7867 unresolved_reloc, warned, ignored);
7868
7869 sym_name = h->root.root.string;
7870 }
7871
7872 if (sec != NULL && discarded_section (sec))
7873 {
7874 /* For relocs against symbols from removed linkonce sections,
7875 or sections discarded by a linker script, we just want the
7876 section contents zeroed. Avoid any special processing. */
7877 howto = NULL;
7878 if (r_type < R_PPC_max)
7879 howto = ppc_elf_howto_table[r_type];
7880
7881 _bfd_clear_contents (howto, input_bfd, input_section,
7882 contents + rel->r_offset);
7883 wrel->r_offset = rel->r_offset;
7884 wrel->r_info = 0;
7885 wrel->r_addend = 0;
7886
7887 /* For ld -r, remove relocations in debug sections against
7888 sections defined in discarded sections. Not done for
7889 non-debug to preserve relocs in .eh_frame which the
7890 eh_frame editing code expects to be present. */
7891 if (bfd_link_relocatable (info)
7892 && (input_section->flags & SEC_DEBUGGING))
7893 wrel--;
7894
7895 continue;
7896 }
7897
7898 if (bfd_link_relocatable (info))
7899 {
7900 if (got2 != NULL
7901 && r_type == R_PPC_PLTREL24
7902 && rel->r_addend != 0)
7903 {
7904 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7905 addend specifies the GOT pointer offset within .got2. */
7906 rel->r_addend += got2->output_offset;
7907 }
7908 if (r_type != R_PPC_RELAX_PLT
7909 && r_type != R_PPC_RELAX_PLTREL24
7910 && r_type != R_PPC_RELAX)
7911 goto copy_reloc;
7912 }
7913
7914 /* TLS optimizations. Replace instruction sequences and relocs
7915 based on information we collected in tls_optimize. We edit
7916 RELOCS so that --emit-relocs will output something sensible
7917 for the final instruction stream. */
7918 tls_mask = 0;
7919 tls_gd = 0;
7920 if (h != NULL)
7921 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7922 else if (local_got_offsets != NULL)
7923 {
7924 struct plt_entry **local_plt;
7925 char *lgot_masks;
7926 local_plt
7927 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7928 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7929 tls_mask = lgot_masks[r_symndx];
7930 }
7931
7932 /* Ensure reloc mapping code below stays sane. */
7933 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7934 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7935 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7936 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7937 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7938 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7939 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7940 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7941 abort ();
7942 switch (r_type)
7943 {
7944 default:
7945 break;
7946
7947 case R_PPC_GOT_TPREL16:
7948 case R_PPC_GOT_TPREL16_LO:
7949 if ((tls_mask & TLS_TLS) != 0
7950 && (tls_mask & TLS_TPREL) == 0)
7951 {
7952 bfd_vma insn;
7953
7954 insn = bfd_get_32 (input_bfd,
7955 contents + rel->r_offset - d_offset);
7956 insn &= 31 << 21;
7957 insn |= 0x3c020000; /* addis 0,2,0 */
7958 bfd_put_32 (input_bfd, insn,
7959 contents + rel->r_offset - d_offset);
7960 r_type = R_PPC_TPREL16_HA;
7961 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7962 }
7963 break;
7964
7965 case R_PPC_TLS:
7966 if ((tls_mask & TLS_TLS) != 0
7967 && (tls_mask & TLS_TPREL) == 0)
7968 {
7969 bfd_vma insn;
7970
7971 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7972 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7973 if (insn == 0)
7974 abort ();
7975 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7976 r_type = R_PPC_TPREL16_LO;
7977 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7978
7979 /* Was PPC_TLS which sits on insn boundary, now
7980 PPC_TPREL16_LO which is at low-order half-word. */
7981 rel->r_offset += d_offset;
7982 }
7983 break;
7984
7985 case R_PPC_GOT_TLSGD16_HI:
7986 case R_PPC_GOT_TLSGD16_HA:
7987 tls_gd = TLS_TPRELGD;
7988 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7989 goto tls_gdld_hi;
7990 break;
7991
7992 case R_PPC_GOT_TLSLD16_HI:
7993 case R_PPC_GOT_TLSLD16_HA:
7994 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7995 {
7996 tls_gdld_hi:
7997 if ((tls_mask & tls_gd) != 0)
7998 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7999 + R_PPC_GOT_TPREL16);
8000 else
8001 {
8002 rel->r_offset -= d_offset;
8003 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8004 r_type = R_PPC_NONE;
8005 }
8006 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8007 }
8008 break;
8009
8010 case R_PPC_GOT_TLSGD16:
8011 case R_PPC_GOT_TLSGD16_LO:
8012 tls_gd = TLS_TPRELGD;
8013 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8014 goto tls_ldgd_opt;
8015 break;
8016
8017 case R_PPC_GOT_TLSLD16:
8018 case R_PPC_GOT_TLSLD16_LO:
8019 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8020 {
8021 unsigned int insn1, insn2;
8022 bfd_vma offset;
8023
8024 tls_ldgd_opt:
8025 offset = (bfd_vma) -1;
8026 /* If not using the newer R_PPC_TLSGD/LD to mark
8027 __tls_get_addr calls, we must trust that the call
8028 stays with its arg setup insns, ie. that the next
8029 reloc is the __tls_get_addr call associated with
8030 the current reloc. Edit both insns. */
8031 if (input_section->has_tls_get_addr_call
8032 && rel + 1 < relend
8033 && branch_reloc_hash_match (input_bfd, rel + 1,
8034 htab->tls_get_addr))
8035 offset = rel[1].r_offset;
8036 /* We read the low GOT_TLS insn because we need to keep
8037 the destination reg. It may be something other than
8038 the usual r3, and moved to r3 before the call by
8039 intervening code. */
8040 insn1 = bfd_get_32 (input_bfd,
8041 contents + rel->r_offset - d_offset);
8042 if ((tls_mask & tls_gd) != 0)
8043 {
8044 /* IE */
8045 insn1 &= (0x1f << 21) | (0x1f << 16);
8046 insn1 |= 32 << 26; /* lwz */
8047 if (offset != (bfd_vma) -1)
8048 {
8049 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8050 insn2 = 0x7c631214; /* add 3,3,2 */
8051 bfd_put_32 (input_bfd, insn2, contents + offset);
8052 }
8053 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8054 + R_PPC_GOT_TPREL16);
8055 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8056 }
8057 else
8058 {
8059 /* LE */
8060 insn1 &= 0x1f << 21;
8061 insn1 |= 0x3c020000; /* addis r,2,0 */
8062 if (tls_gd == 0)
8063 {
8064 /* Was an LD reloc. */
8065 for (r_symndx = 0;
8066 r_symndx < symtab_hdr->sh_info;
8067 r_symndx++)
8068 if (local_sections[r_symndx] == sec)
8069 break;
8070 if (r_symndx >= symtab_hdr->sh_info)
8071 r_symndx = STN_UNDEF;
8072 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8073 if (r_symndx != STN_UNDEF)
8074 rel->r_addend -= (local_syms[r_symndx].st_value
8075 + sec->output_offset
8076 + sec->output_section->vma);
8077 }
8078 r_type = R_PPC_TPREL16_HA;
8079 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8080 if (offset != (bfd_vma) -1)
8081 {
8082 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8083 rel[1].r_offset = offset + d_offset;
8084 rel[1].r_addend = rel->r_addend;
8085 insn2 = 0x38630000; /* addi 3,3,0 */
8086 bfd_put_32 (input_bfd, insn2, contents + offset);
8087 }
8088 }
8089 bfd_put_32 (input_bfd, insn1,
8090 contents + rel->r_offset - d_offset);
8091 if (tls_gd == 0)
8092 {
8093 /* We changed the symbol on an LD reloc. Start over
8094 in order to get h, sym, sec etc. right. */
8095 goto again;
8096 }
8097 }
8098 break;
8099
8100 case R_PPC_TLSGD:
8101 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8102 {
8103 unsigned int insn2;
8104 bfd_vma offset = rel->r_offset;
8105
8106 if ((tls_mask & TLS_TPRELGD) != 0)
8107 {
8108 /* IE */
8109 r_type = R_PPC_NONE;
8110 insn2 = 0x7c631214; /* add 3,3,2 */
8111 }
8112 else
8113 {
8114 /* LE */
8115 r_type = R_PPC_TPREL16_LO;
8116 rel->r_offset += d_offset;
8117 insn2 = 0x38630000; /* addi 3,3,0 */
8118 }
8119 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8120 bfd_put_32 (input_bfd, insn2, contents + offset);
8121 /* Zap the reloc on the _tls_get_addr call too. */
8122 BFD_ASSERT (offset == rel[1].r_offset);
8123 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8124 }
8125 break;
8126
8127 case R_PPC_TLSLD:
8128 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8129 {
8130 unsigned int insn2;
8131
8132 for (r_symndx = 0;
8133 r_symndx < symtab_hdr->sh_info;
8134 r_symndx++)
8135 if (local_sections[r_symndx] == sec)
8136 break;
8137 if (r_symndx >= symtab_hdr->sh_info)
8138 r_symndx = STN_UNDEF;
8139 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8140 if (r_symndx != STN_UNDEF)
8141 rel->r_addend -= (local_syms[r_symndx].st_value
8142 + sec->output_offset
8143 + sec->output_section->vma);
8144
8145 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8146 rel->r_offset += d_offset;
8147 insn2 = 0x38630000; /* addi 3,3,0 */
8148 bfd_put_32 (input_bfd, insn2,
8149 contents + rel->r_offset - d_offset);
8150 /* Zap the reloc on the _tls_get_addr call too. */
8151 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8152 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8153 goto again;
8154 }
8155 break;
8156 }
8157
8158 /* Handle other relocations that tweak non-addend part of insn. */
8159 branch_bit = 0;
8160 switch (r_type)
8161 {
8162 default:
8163 break;
8164
8165 /* Branch taken prediction relocations. */
8166 case R_PPC_ADDR14_BRTAKEN:
8167 case R_PPC_REL14_BRTAKEN:
8168 branch_bit = BRANCH_PREDICT_BIT;
8169 /* Fall through. */
8170
8171 /* Branch not taken prediction relocations. */
8172 case R_PPC_ADDR14_BRNTAKEN:
8173 case R_PPC_REL14_BRNTAKEN:
8174 {
8175 bfd_vma insn;
8176
8177 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8178 insn &= ~BRANCH_PREDICT_BIT;
8179 insn |= branch_bit;
8180
8181 from = (rel->r_offset
8182 + input_section->output_offset
8183 + input_section->output_section->vma);
8184
8185 /* Invert 'y' bit if not the default. */
8186 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8187 insn ^= BRANCH_PREDICT_BIT;
8188
8189 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8190 break;
8191 }
8192 }
8193
8194 if (ELIMINATE_COPY_RELOCS
8195 && h != NULL
8196 && !h->def_regular
8197 && h->protected_def
8198 && ppc_elf_hash_entry (h)->has_addr16_ha
8199 && ppc_elf_hash_entry (h)->has_addr16_lo
8200 && htab->params->pic_fixup > 0)
8201 {
8202 /* Convert lis;addi or lis;load/store accessing a protected
8203 variable defined in a shared library to PIC. */
8204 unsigned int insn;
8205
8206 if (r_type == R_PPC_ADDR16_HA)
8207 {
8208 insn = bfd_get_32 (input_bfd,
8209 contents + rel->r_offset - d_offset);
8210 if ((insn & (0x3f << 26)) == (15u << 26)
8211 && (insn & (0x1f << 16)) == 0 /* lis */)
8212 {
8213 bfd_byte *p;
8214 bfd_vma off;
8215 bfd_vma got_addr;
8216
8217 p = (contents + input_section->size
8218 - relax_info->workaround_size
8219 - relax_info->picfixup_size
8220 + picfixup_size);
8221 off = (p - contents) - (rel->r_offset - d_offset);
8222 if (off > 0x1fffffc || (off & 3) != 0)
8223 info->callbacks->einfo
8224 (_("%P: %H: fixup branch overflow\n"),
8225 input_bfd, input_section, rel->r_offset);
8226
8227 bfd_put_32 (input_bfd, B | off,
8228 contents + rel->r_offset - d_offset);
8229 got_addr = (htab->elf.sgot->output_section->vma
8230 + htab->elf.sgot->output_offset
8231 + (h->got.offset & ~1));
8232 wrel->r_offset = (p - contents) + d_offset;
8233 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8234 wrel->r_addend = got_addr;
8235 insn &= ~0xffff;
8236 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8237 bfd_put_32 (input_bfd, insn, p);
8238
8239 /* Convert lis to lwz, loading address from GOT. */
8240 insn &= ~0xffff;
8241 insn ^= (32u ^ 15u) << 26;
8242 insn |= (insn & (0x1f << 21)) >> 5;
8243 insn |= got_addr & 0xffff;
8244 bfd_put_32 (input_bfd, insn, p + 4);
8245
8246 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8247 picfixup_size += 12;
8248
8249 /* Use one of the spare relocs, so --emit-relocs
8250 output is reasonable. */
8251 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8252 wrel++, rel++;
8253 rel->r_offset = wrel[-1].r_offset + 4;
8254 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8255 rel->r_addend = wrel[-1].r_addend;
8256
8257 /* Continue on as if we had a got reloc, to output
8258 dynamic reloc. */
8259 r_type = R_PPC_GOT16_LO;
8260 }
8261 else
8262 info->callbacks->einfo
8263 /* xgettext:c-format */
8264 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8265 input_bfd, input_section, rel->r_offset,
8266 "R_PPC_ADDR16_HA", insn);
8267 }
8268 else if (r_type == R_PPC_ADDR16_LO)
8269 {
8270 insn = bfd_get_32 (input_bfd,
8271 contents + rel->r_offset - d_offset);
8272 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8273 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8274 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8275 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8276 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8277 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8278 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8279 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8280 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8281 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8282 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8283 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8284 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8285 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8286 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8287 && (insn & 3) != 1)
8288 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8289 && ((insn & 3) == 0 || (insn & 3) == 3)))
8290 {
8291 /* Arrange to apply the reloc addend, if any. */
8292 relocation = 0;
8293 unresolved_reloc = FALSE;
8294 rel->r_info = ELF32_R_INFO (0, r_type);
8295 }
8296 else
8297 info->callbacks->einfo
8298 /* xgettext:c-format */
8299 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8300 input_bfd, input_section, rel->r_offset,
8301 "R_PPC_ADDR16_LO", insn);
8302 }
8303 }
8304
8305 ifunc = NULL;
8306 if (!htab->is_vxworks)
8307 {
8308 struct plt_entry *ent;
8309
8310 if (h != NULL)
8311 {
8312 if (h->type == STT_GNU_IFUNC)
8313 ifunc = &h->plt.plist;
8314 }
8315 else if (local_got_offsets != NULL
8316 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8317 {
8318 struct plt_entry **local_plt;
8319
8320 local_plt = (struct plt_entry **) (local_got_offsets
8321 + symtab_hdr->sh_info);
8322 ifunc = local_plt + r_symndx;
8323 }
8324
8325 ent = NULL;
8326 if (ifunc != NULL
8327 && (!bfd_link_pic (info)
8328 || is_branch_reloc (r_type)))
8329 {
8330 addend = 0;
8331 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8332 addend = rel->r_addend;
8333 ent = find_plt_ent (ifunc, got2, addend);
8334 }
8335 if (ent != NULL)
8336 {
8337 if (bfd_link_pic (info)
8338 && ent->sec != got2
8339 && htab->plt_type != PLT_NEW
8340 && (!htab->elf.dynamic_sections_created
8341 || h == NULL
8342 || h->dynindx == -1))
8343 {
8344 /* Uh oh, we are going to create a pic glink stub
8345 for an ifunc (here for h == NULL and later in
8346 finish_dynamic_symbol for h != NULL), and
8347 apparently are using code compiled with
8348 -mbss-plt. The difficulty is that -mbss-plt code
8349 gives no indication via a magic PLTREL24 addend
8350 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8351 is pointing into a .got2 section (and how far
8352 into .got2). */
8353 info->callbacks->einfo
8354 /* xgettext:c-format */
8355 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8356 input_bfd, input_section, rel->r_offset, sym_name);
8357 }
8358 if (h == NULL && (ent->plt.offset & 1) == 0)
8359 {
8360 Elf_Internal_Rela rela;
8361 bfd_byte *loc;
8362
8363 rela.r_offset = (htab->elf.iplt->output_section->vma
8364 + htab->elf.iplt->output_offset
8365 + ent->plt.offset);
8366 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8367 rela.r_addend = relocation;
8368 loc = htab->elf.irelplt->contents;
8369 loc += (htab->elf.irelplt->reloc_count++
8370 * sizeof (Elf32_External_Rela));
8371 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8372
8373 ent->plt.offset |= 1;
8374 }
8375 if (h == NULL && (ent->glink_offset & 1) == 0)
8376 {
8377 unsigned char *p = ((unsigned char *) htab->glink->contents
8378 + ent->glink_offset);
8379 write_glink_stub (ent, htab->elf.iplt, p, info);
8380 ent->glink_offset |= 1;
8381 }
8382
8383 unresolved_reloc = FALSE;
8384 if (htab->plt_type == PLT_NEW
8385 || !htab->elf.dynamic_sections_created
8386 || h == NULL
8387 || h->dynindx == -1)
8388 relocation = (htab->glink->output_section->vma
8389 + htab->glink->output_offset
8390 + (ent->glink_offset & ~1));
8391 else
8392 relocation = (htab->elf.splt->output_section->vma
8393 + htab->elf.splt->output_offset
8394 + ent->plt.offset);
8395 }
8396 }
8397
8398 addend = rel->r_addend;
8399 tls_type = 0;
8400 howto = NULL;
8401 if (r_type < R_PPC_max)
8402 howto = ppc_elf_howto_table[r_type];
8403 switch (r_type)
8404 {
8405 default:
8406 info->callbacks->einfo
8407 /* xgettext:c-format */
8408 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8409 input_bfd, (int) r_type, sym_name);
8410
8411 bfd_set_error (bfd_error_bad_value);
8412 ret = FALSE;
8413 goto copy_reloc;
8414
8415 case R_PPC_NONE:
8416 case R_PPC_TLS:
8417 case R_PPC_TLSGD:
8418 case R_PPC_TLSLD:
8419 case R_PPC_EMB_MRKREF:
8420 case R_PPC_GNU_VTINHERIT:
8421 case R_PPC_GNU_VTENTRY:
8422 goto copy_reloc;
8423
8424 /* GOT16 relocations. Like an ADDR16 using the symbol's
8425 address in the GOT as relocation value instead of the
8426 symbol's value itself. Also, create a GOT entry for the
8427 symbol and put the symbol value there. */
8428 case R_PPC_GOT_TLSGD16:
8429 case R_PPC_GOT_TLSGD16_LO:
8430 case R_PPC_GOT_TLSGD16_HI:
8431 case R_PPC_GOT_TLSGD16_HA:
8432 tls_type = TLS_TLS | TLS_GD;
8433 goto dogot;
8434
8435 case R_PPC_GOT_TLSLD16:
8436 case R_PPC_GOT_TLSLD16_LO:
8437 case R_PPC_GOT_TLSLD16_HI:
8438 case R_PPC_GOT_TLSLD16_HA:
8439 tls_type = TLS_TLS | TLS_LD;
8440 goto dogot;
8441
8442 case R_PPC_GOT_TPREL16:
8443 case R_PPC_GOT_TPREL16_LO:
8444 case R_PPC_GOT_TPREL16_HI:
8445 case R_PPC_GOT_TPREL16_HA:
8446 tls_type = TLS_TLS | TLS_TPREL;
8447 goto dogot;
8448
8449 case R_PPC_GOT_DTPREL16:
8450 case R_PPC_GOT_DTPREL16_LO:
8451 case R_PPC_GOT_DTPREL16_HI:
8452 case R_PPC_GOT_DTPREL16_HA:
8453 tls_type = TLS_TLS | TLS_DTPREL;
8454 goto dogot;
8455
8456 case R_PPC_GOT16:
8457 case R_PPC_GOT16_LO:
8458 case R_PPC_GOT16_HI:
8459 case R_PPC_GOT16_HA:
8460 tls_mask = 0;
8461 dogot:
8462 {
8463 /* Relocation is to the entry for this symbol in the global
8464 offset table. */
8465 bfd_vma off;
8466 bfd_vma *offp;
8467 unsigned long indx;
8468
8469 if (htab->elf.sgot == NULL)
8470 abort ();
8471
8472 indx = 0;
8473 if (tls_type == (TLS_TLS | TLS_LD)
8474 && (h == NULL
8475 || !h->def_dynamic))
8476 offp = &htab->tlsld_got.offset;
8477 else if (h != NULL)
8478 {
8479 if (!htab->elf.dynamic_sections_created
8480 || h->dynindx == -1
8481 || SYMBOL_REFERENCES_LOCAL (info, h)
8482 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8483 && h->root.type == bfd_link_hash_undefweak))
8484 /* This is actually a static link, or it is a
8485 -Bsymbolic link and the symbol is defined
8486 locally, or the symbol was forced to be local
8487 because of a version file. */
8488 ;
8489 else
8490 {
8491 indx = h->dynindx;
8492 unresolved_reloc = FALSE;
8493 }
8494 offp = &h->got.offset;
8495 }
8496 else
8497 {
8498 if (local_got_offsets == NULL)
8499 abort ();
8500 offp = &local_got_offsets[r_symndx];
8501 }
8502
8503 /* The offset must always be a multiple of 4. We use the
8504 least significant bit to record whether we have already
8505 processed this entry. */
8506 off = *offp;
8507 if ((off & 1) != 0)
8508 off &= ~1;
8509 else
8510 {
8511 unsigned int tls_m = (tls_mask
8512 & (TLS_LD | TLS_GD | TLS_DTPREL
8513 | TLS_TPREL | TLS_TPRELGD));
8514
8515 if (offp == &htab->tlsld_got.offset)
8516 tls_m = TLS_LD;
8517 else if (h == NULL
8518 || !h->def_dynamic)
8519 tls_m &= ~TLS_LD;
8520
8521 /* We might have multiple got entries for this sym.
8522 Initialize them all. */
8523 do
8524 {
8525 int tls_ty = 0;
8526
8527 if ((tls_m & TLS_LD) != 0)
8528 {
8529 tls_ty = TLS_TLS | TLS_LD;
8530 tls_m &= ~TLS_LD;
8531 }
8532 else if ((tls_m & TLS_GD) != 0)
8533 {
8534 tls_ty = TLS_TLS | TLS_GD;
8535 tls_m &= ~TLS_GD;
8536 }
8537 else if ((tls_m & TLS_DTPREL) != 0)
8538 {
8539 tls_ty = TLS_TLS | TLS_DTPREL;
8540 tls_m &= ~TLS_DTPREL;
8541 }
8542 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8543 {
8544 tls_ty = TLS_TLS | TLS_TPREL;
8545 tls_m = 0;
8546 }
8547
8548 /* Generate relocs for the dynamic linker. */
8549 if (indx != 0
8550 || (bfd_link_pic (info)
8551 && (h == NULL
8552 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8553 || h->root.type != bfd_link_hash_undefweak
8554 || offp == &htab->tlsld_got.offset)))
8555 {
8556 asection *rsec = htab->elf.srelgot;
8557 bfd_byte * loc;
8558
8559 if (ifunc != NULL)
8560 rsec = htab->elf.irelplt;
8561 outrel.r_offset = (htab->elf.sgot->output_section->vma
8562 + htab->elf.sgot->output_offset
8563 + off);
8564 outrel.r_addend = 0;
8565 if (tls_ty & (TLS_LD | TLS_GD))
8566 {
8567 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8568 if (tls_ty == (TLS_TLS | TLS_GD))
8569 {
8570 loc = rsec->contents;
8571 loc += (rsec->reloc_count++
8572 * sizeof (Elf32_External_Rela));
8573 bfd_elf32_swap_reloca_out (output_bfd,
8574 &outrel, loc);
8575 outrel.r_offset += 4;
8576 outrel.r_info
8577 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8578 }
8579 }
8580 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8581 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8582 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8583 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8584 else if (indx != 0)
8585 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8586 else if (ifunc != NULL)
8587 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8588 else
8589 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8590 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8591 {
8592 outrel.r_addend += relocation;
8593 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8594 {
8595 if (htab->elf.tls_sec == NULL)
8596 outrel.r_addend = 0;
8597 else
8598 outrel.r_addend -= htab->elf.tls_sec->vma;
8599 }
8600 }
8601 loc = rsec->contents;
8602 loc += (rsec->reloc_count++
8603 * sizeof (Elf32_External_Rela));
8604 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8605 }
8606
8607 /* Init the .got section contents if we're not
8608 emitting a reloc. */
8609 else
8610 {
8611 bfd_vma value = relocation;
8612 int tlsopt = (htab->plt_type == PLT_NEW
8613 && !htab->params->no_tls_get_addr_opt
8614 && htab->tls_get_addr != NULL
8615 && htab->tls_get_addr->plt.plist != NULL);
8616
8617 if (tls_ty != 0)
8618 {
8619 if (htab->elf.tls_sec == NULL)
8620 value = 0;
8621 else
8622 {
8623 if (tls_ty & TLS_LD)
8624 value = 0;
8625 else
8626 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8627 if ((tls_ty & TLS_TPREL)
8628 || (tlsopt && !(tls_ty & TLS_DTPREL)))
8629 value += DTP_OFFSET - TP_OFFSET;
8630 }
8631
8632 if (tls_ty & (TLS_LD | TLS_GD))
8633 {
8634 bfd_put_32 (input_bfd, value,
8635 htab->elf.sgot->contents + off + 4);
8636 value = !tlsopt;
8637 }
8638 }
8639 bfd_put_32 (input_bfd, value,
8640 htab->elf.sgot->contents + off);
8641 }
8642
8643 off += 4;
8644 if (tls_ty & (TLS_LD | TLS_GD))
8645 off += 4;
8646 }
8647 while (tls_m != 0);
8648
8649 off = *offp;
8650 *offp = off | 1;
8651 }
8652
8653 if (off >= (bfd_vma) -2)
8654 abort ();
8655
8656 if ((tls_type & TLS_TLS) != 0)
8657 {
8658 if (tls_type != (TLS_TLS | TLS_LD))
8659 {
8660 if ((tls_mask & TLS_LD) != 0
8661 && !(h == NULL
8662 || !h->def_dynamic))
8663 off += 8;
8664 if (tls_type != (TLS_TLS | TLS_GD))
8665 {
8666 if ((tls_mask & TLS_GD) != 0)
8667 off += 8;
8668 if (tls_type != (TLS_TLS | TLS_DTPREL))
8669 {
8670 if ((tls_mask & TLS_DTPREL) != 0)
8671 off += 4;
8672 }
8673 }
8674 }
8675 }
8676
8677 /* If here for a picfixup, we're done. */
8678 if (r_type != ELF32_R_TYPE (rel->r_info))
8679 goto copy_reloc;
8680
8681 relocation = (htab->elf.sgot->output_section->vma
8682 + htab->elf.sgot->output_offset
8683 + off
8684 - SYM_VAL (htab->elf.hgot));
8685
8686 /* Addends on got relocations don't make much sense.
8687 x+off@got is actually x@got+off, and since the got is
8688 generated by a hash table traversal, the value in the
8689 got at entry m+n bears little relation to the entry m. */
8690 if (addend != 0)
8691 info->callbacks->einfo
8692 /* xgettext:c-format */
8693 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8694 input_bfd, input_section, rel->r_offset,
8695 howto->name,
8696 sym_name);
8697 }
8698 break;
8699
8700 /* Relocations that need no special processing. */
8701 case R_PPC_LOCAL24PC:
8702 /* It makes no sense to point a local relocation
8703 at a symbol not in this object. */
8704 if (unresolved_reloc)
8705 {
8706 (*info->callbacks->undefined_symbol) (info,
8707 h->root.root.string,
8708 input_bfd,
8709 input_section,
8710 rel->r_offset,
8711 TRUE);
8712 goto copy_reloc;
8713 }
8714 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8715 {
8716 /* @local on an ifunc does not really make sense since
8717 the ifunc resolver can take you anywhere. More
8718 seriously, calls to ifuncs must go through a plt call
8719 stub, and for pic the plt call stubs uses r30 to
8720 access the PLT. The problem is that a call that is
8721 local won't have the +32k reloc addend trick marking
8722 -fPIC code, so the linker won't know whether r30 is
8723 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8724 /* xgettext:c-format */
8725 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8726 input_bfd, input_section, rel->r_offset,
8727 h->root.root.string);
8728 }
8729 break;
8730
8731 case R_PPC_DTPREL16:
8732 case R_PPC_DTPREL16_LO:
8733 case R_PPC_DTPREL16_HI:
8734 case R_PPC_DTPREL16_HA:
8735 if (htab->elf.tls_sec != NULL)
8736 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8737 break;
8738
8739 /* Relocations that may need to be propagated if this is a shared
8740 object. */
8741 case R_PPC_TPREL16:
8742 case R_PPC_TPREL16_LO:
8743 case R_PPC_TPREL16_HI:
8744 case R_PPC_TPREL16_HA:
8745 if (h != NULL
8746 && h->root.type == bfd_link_hash_undefweak
8747 && h->dynindx == -1)
8748 {
8749 /* Make this relocation against an undefined weak symbol
8750 resolve to zero. This is really just a tweak, since
8751 code using weak externs ought to check that they are
8752 defined before using them. */
8753 bfd_byte *p = contents + rel->r_offset - d_offset;
8754 unsigned int insn = bfd_get_32 (input_bfd, p);
8755 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8756 if (insn != 0)
8757 bfd_put_32 (input_bfd, insn, p);
8758 break;
8759 }
8760 if (htab->elf.tls_sec != NULL)
8761 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8762 /* The TPREL16 relocs shouldn't really be used in shared
8763 libs as they will result in DT_TEXTREL being set, but
8764 support them anyway. */
8765 goto dodyn;
8766
8767 case R_PPC_TPREL32:
8768 if (htab->elf.tls_sec != NULL)
8769 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8770 goto dodyn;
8771
8772 case R_PPC_DTPREL32:
8773 if (htab->elf.tls_sec != NULL)
8774 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8775 goto dodyn;
8776
8777 case R_PPC_DTPMOD32:
8778 relocation = 1;
8779 addend = 0;
8780 goto dodyn;
8781
8782 case R_PPC_REL16:
8783 case R_PPC_REL16_LO:
8784 case R_PPC_REL16_HI:
8785 case R_PPC_REL16_HA:
8786 case R_PPC_REL16DX_HA:
8787 break;
8788
8789 case R_PPC_REL32:
8790 if (h == NULL || h == htab->elf.hgot)
8791 break;
8792 /* fall through */
8793
8794 case R_PPC_ADDR32:
8795 case R_PPC_ADDR16:
8796 case R_PPC_ADDR16_LO:
8797 case R_PPC_ADDR16_HI:
8798 case R_PPC_ADDR16_HA:
8799 case R_PPC_UADDR32:
8800 case R_PPC_UADDR16:
8801 goto dodyn;
8802
8803 case R_PPC_VLE_REL8:
8804 case R_PPC_VLE_REL15:
8805 case R_PPC_VLE_REL24:
8806 case R_PPC_REL24:
8807 case R_PPC_REL14:
8808 case R_PPC_REL14_BRTAKEN:
8809 case R_PPC_REL14_BRNTAKEN:
8810 /* If these relocations are not to a named symbol, they can be
8811 handled right here, no need to bother the dynamic linker. */
8812 if (SYMBOL_CALLS_LOCAL (info, h)
8813 || h == htab->elf.hgot)
8814 break;
8815 /* fall through */
8816
8817 case R_PPC_ADDR24:
8818 case R_PPC_ADDR14:
8819 case R_PPC_ADDR14_BRTAKEN:
8820 case R_PPC_ADDR14_BRNTAKEN:
8821 if (h != NULL && !bfd_link_pic (info))
8822 break;
8823 /* fall through */
8824
8825 dodyn:
8826 if ((input_section->flags & SEC_ALLOC) == 0
8827 || is_vxworks_tls)
8828 break;
8829
8830 if ((bfd_link_pic (info)
8831 && !(h != NULL
8832 && ((h->root.type == bfd_link_hash_undefined
8833 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8834 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8835 || (h->root.type == bfd_link_hash_undefweak
8836 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8837 && (must_be_dyn_reloc (info, r_type)
8838 || !SYMBOL_CALLS_LOCAL (info, h)))
8839 || (ELIMINATE_COPY_RELOCS
8840 && !bfd_link_pic (info)
8841 && h != NULL
8842 && h->dynindx != -1
8843 && !h->non_got_ref
8844 && !h->def_regular
8845 && !(h->protected_def
8846 && ppc_elf_hash_entry (h)->has_addr16_ha
8847 && ppc_elf_hash_entry (h)->has_addr16_lo
8848 && htab->params->pic_fixup > 0)))
8849 {
8850 int skip;
8851 bfd_byte *loc;
8852 asection *sreloc;
8853 #ifdef DEBUG
8854 fprintf (stderr, "ppc_elf_relocate_section needs to "
8855 "create relocation for %s\n",
8856 (h && h->root.root.string
8857 ? h->root.root.string : "<unknown>"));
8858 #endif
8859
8860 /* When generating a shared object, these relocations
8861 are copied into the output file to be resolved at run
8862 time. */
8863 sreloc = elf_section_data (input_section)->sreloc;
8864 if (ifunc)
8865 sreloc = htab->elf.irelplt;
8866 if (sreloc == NULL)
8867 return FALSE;
8868
8869 skip = 0;
8870 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8871 input_section,
8872 rel->r_offset);
8873 if (outrel.r_offset == (bfd_vma) -1
8874 || outrel.r_offset == (bfd_vma) -2)
8875 skip = (int) outrel.r_offset;
8876 outrel.r_offset += (input_section->output_section->vma
8877 + input_section->output_offset);
8878
8879 if (skip)
8880 memset (&outrel, 0, sizeof outrel);
8881 else if ((h != NULL
8882 && (h->root.type == bfd_link_hash_undefined
8883 || h->root.type == bfd_link_hash_undefweak))
8884 || !SYMBOL_REFERENCES_LOCAL (info, h))
8885 {
8886 BFD_ASSERT (h->dynindx != -1);
8887 unresolved_reloc = FALSE;
8888 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8889 outrel.r_addend = rel->r_addend;
8890 }
8891 else
8892 {
8893 outrel.r_addend = relocation + rel->r_addend;
8894
8895 if (r_type != R_PPC_ADDR32)
8896 {
8897 long indx = 0;
8898
8899 if (ifunc != NULL)
8900 {
8901 /* If we get here when building a static
8902 executable, then the libc startup function
8903 responsible for applying indirect function
8904 relocations is going to complain about
8905 the reloc type.
8906 If we get here when building a dynamic
8907 executable, it will be because we have
8908 a text relocation. The dynamic loader
8909 will set the text segment writable and
8910 non-executable to apply text relocations.
8911 So we'll segfault when trying to run the
8912 indirection function to resolve the reloc. */
8913 info->callbacks->einfo
8914 /* xgettext:c-format */
8915 (_("%P: %H: relocation %s for indirect "
8916 "function %s unsupported\n"),
8917 input_bfd, input_section, rel->r_offset,
8918 howto->name,
8919 sym_name);
8920 ret = FALSE;
8921 }
8922 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8923 ;
8924 else if (sec == NULL || sec->owner == NULL)
8925 {
8926 bfd_set_error (bfd_error_bad_value);
8927 ret = FALSE;
8928 }
8929 else
8930 {
8931 asection *osec;
8932
8933 /* We are turning this relocation into one
8934 against a section symbol. It would be
8935 proper to subtract the symbol's value,
8936 osec->vma, from the emitted reloc addend,
8937 but ld.so expects buggy relocs.
8938 FIXME: Why not always use a zero index? */
8939 osec = sec->output_section;
8940 indx = elf_section_data (osec)->dynindx;
8941 if (indx == 0)
8942 {
8943 osec = htab->elf.text_index_section;
8944 indx = elf_section_data (osec)->dynindx;
8945 }
8946 BFD_ASSERT (indx != 0);
8947 #ifdef DEBUG
8948 if (indx == 0)
8949 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8950 indx, osec->name, osec->flags,
8951 h->root.root.string);
8952 #endif
8953 }
8954
8955 outrel.r_info = ELF32_R_INFO (indx, r_type);
8956 }
8957 else if (ifunc != NULL)
8958 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8959 else
8960 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8961 }
8962
8963 loc = sreloc->contents;
8964 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8965 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8966
8967 if (skip == -1)
8968 goto copy_reloc;
8969
8970 /* This reloc will be computed at runtime. Clear the memory
8971 so that it contains a predictable value for prelink. */
8972 if (!skip)
8973 {
8974 relocation = howto->pc_relative ? outrel.r_offset : 0;
8975 addend = 0;
8976 break;
8977 }
8978 }
8979 else if (r_type == R_PPC_DTPMOD32
8980 && htab->plt_type == PLT_NEW
8981 && !htab->params->no_tls_get_addr_opt
8982 && htab->tls_get_addr != NULL
8983 && htab->tls_get_addr->plt.plist != NULL)
8984 {
8985 /* Set up for __tls_get_addr_opt stub when this entry
8986 does not have dynamic relocs. */
8987 relocation = 0;
8988 /* Set up the next word for local dynamic. If it turns
8989 out to be global dynamic, the reloc will overwrite
8990 this value. */
8991 if (rel->r_offset + 8 <= input_section->size)
8992 bfd_put_32 (input_bfd, DTP_OFFSET - TP_OFFSET,
8993 contents + rel->r_offset + 4);
8994 }
8995 else if (r_type == R_PPC_DTPREL32
8996 && htab->plt_type == PLT_NEW
8997 && !htab->params->no_tls_get_addr_opt
8998 && htab->tls_get_addr != NULL
8999 && htab->tls_get_addr->plt.plist != NULL
9000 && rel > relocs
9001 && rel[-1].r_info == ELF32_R_INFO (r_symndx, R_PPC_DTPMOD32)
9002 && rel[-1].r_offset + 4 == rel->r_offset)
9003 {
9004 /* __tls_get_addr_opt stub value. */
9005 addend += DTP_OFFSET - TP_OFFSET;
9006 }
9007 break;
9008
9009 case R_PPC_RELAX_PLT:
9010 case R_PPC_RELAX_PLTREL24:
9011 if (h != NULL)
9012 {
9013 struct plt_entry *ent;
9014 bfd_vma got2_addend = 0;
9015
9016 if (r_type == R_PPC_RELAX_PLTREL24)
9017 {
9018 if (bfd_link_pic (info))
9019 got2_addend = addend;
9020 addend = 0;
9021 }
9022 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9023 if (htab->plt_type == PLT_NEW)
9024 relocation = (htab->glink->output_section->vma
9025 + htab->glink->output_offset
9026 + ent->glink_offset);
9027 else
9028 relocation = (htab->elf.splt->output_section->vma
9029 + htab->elf.splt->output_offset
9030 + ent->plt.offset);
9031 }
9032 /* Fall through. */
9033
9034 case R_PPC_RELAX:
9035 {
9036 const int *stub;
9037 size_t size;
9038 size_t insn_offset = rel->r_offset;
9039 unsigned int insn;
9040
9041 if (bfd_link_pic (info))
9042 {
9043 relocation -= (input_section->output_section->vma
9044 + input_section->output_offset
9045 + rel->r_offset - 4);
9046 stub = shared_stub_entry;
9047 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9048 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9049 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9050 stub += 3;
9051 size = ARRAY_SIZE (shared_stub_entry) - 3;
9052 }
9053 else
9054 {
9055 stub = stub_entry;
9056 size = ARRAY_SIZE (stub_entry);
9057 }
9058
9059 relocation += addend;
9060 if (bfd_link_relocatable (info))
9061 relocation = 0;
9062
9063 /* First insn is HA, second is LO. */
9064 insn = *stub++;
9065 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9066 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9067 insn_offset += 4;
9068
9069 insn = *stub++;
9070 insn |= relocation & 0xffff;
9071 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9072 insn_offset += 4;
9073 size -= 2;
9074
9075 while (size != 0)
9076 {
9077 insn = *stub++;
9078 --size;
9079 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9080 insn_offset += 4;
9081 }
9082
9083 /* Rewrite the reloc and convert one of the trailing nop
9084 relocs to describe this relocation. */
9085 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9086 /* The relocs are at the bottom 2 bytes */
9087 wrel->r_offset = rel->r_offset + d_offset;
9088 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9089 wrel->r_addend = rel->r_addend;
9090 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9091 wrel++, rel++;
9092 wrel->r_offset += 4;
9093 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9094 }
9095 continue;
9096
9097 /* Indirect .sdata relocation. */
9098 case R_PPC_EMB_SDAI16:
9099 BFD_ASSERT (htab->sdata[0].section != NULL);
9100 if (!is_static_defined (htab->sdata[0].sym))
9101 {
9102 unresolved_reloc = TRUE;
9103 break;
9104 }
9105 relocation
9106 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9107 h, relocation, rel);
9108 addend = 0;
9109 break;
9110
9111 /* Indirect .sdata2 relocation. */
9112 case R_PPC_EMB_SDA2I16:
9113 BFD_ASSERT (htab->sdata[1].section != NULL);
9114 if (!is_static_defined (htab->sdata[1].sym))
9115 {
9116 unresolved_reloc = TRUE;
9117 break;
9118 }
9119 relocation
9120 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9121 h, relocation, rel);
9122 addend = 0;
9123 break;
9124
9125 /* Handle the TOC16 reloc. We want to use the offset within the .got
9126 section, not the actual VMA. This is appropriate when generating
9127 an embedded ELF object, for which the .got section acts like the
9128 AIX .toc section. */
9129 case R_PPC_TOC16: /* phony GOT16 relocations */
9130 if (sec == NULL || sec->output_section == NULL)
9131 {
9132 unresolved_reloc = TRUE;
9133 break;
9134 }
9135 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9136 ".got") == 0
9137 || strcmp (bfd_get_section_name (sec->owner, sec),
9138 ".cgot") == 0);
9139
9140 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9141 break;
9142
9143 case R_PPC_PLTREL24:
9144 if (h != NULL && ifunc == NULL)
9145 {
9146 struct plt_entry *ent;
9147
9148 ent = find_plt_ent (&h->plt.plist, got2,
9149 bfd_link_pic (info) ? addend : 0);
9150 if (ent == NULL
9151 || htab->elf.splt == NULL)
9152 {
9153 /* We didn't make a PLT entry for this symbol. This
9154 happens when statically linking PIC code, or when
9155 using -Bsymbolic. */
9156 }
9157 else
9158 {
9159 /* Relocation is to the entry for this symbol in the
9160 procedure linkage table. */
9161 unresolved_reloc = FALSE;
9162 if (htab->plt_type == PLT_NEW)
9163 relocation = (htab->glink->output_section->vma
9164 + htab->glink->output_offset
9165 + ent->glink_offset);
9166 else
9167 relocation = (htab->elf.splt->output_section->vma
9168 + htab->elf.splt->output_offset
9169 + ent->plt.offset);
9170 }
9171 }
9172
9173 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9174 addend specifies the GOT pointer offset within .got2.
9175 Don't apply it to the relocation field. */
9176 addend = 0;
9177 break;
9178
9179 /* Relocate against _SDA_BASE_. */
9180 case R_PPC_SDAREL16:
9181 {
9182 const char *name;
9183 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9184
9185 if (sec == NULL
9186 || sec->output_section == NULL
9187 || !is_static_defined (sda))
9188 {
9189 unresolved_reloc = TRUE;
9190 break;
9191 }
9192 addend -= SYM_VAL (sda);
9193
9194 name = bfd_get_section_name (output_bfd, sec->output_section);
9195 if (!(strcmp (name, ".sdata") == 0
9196 || strcmp (name, ".sbss") == 0))
9197 {
9198 info->callbacks->einfo
9199 /* xgettext:c-format */
9200 (_("%P: %B: the target (%s) of a %s relocation is "
9201 "in the wrong output section (%s)\n"),
9202 input_bfd,
9203 sym_name,
9204 howto->name,
9205 name);
9206 }
9207 }
9208 break;
9209
9210 /* Relocate against _SDA2_BASE_. */
9211 case R_PPC_EMB_SDA2REL:
9212 {
9213 const char *name;
9214 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9215
9216 if (sec == NULL
9217 || sec->output_section == NULL
9218 || !is_static_defined (sda))
9219 {
9220 unresolved_reloc = TRUE;
9221 break;
9222 }
9223 addend -= SYM_VAL (sda);
9224
9225 name = bfd_get_section_name (output_bfd, sec->output_section);
9226 if (!(strcmp (name, ".sdata2") == 0
9227 || strcmp (name, ".sbss2") == 0))
9228 {
9229 info->callbacks->einfo
9230 /* xgettext:c-format */
9231 (_("%P: %B: the target (%s) of a %s relocation is "
9232 "in the wrong output section (%s)\n"),
9233 input_bfd,
9234 sym_name,
9235 howto->name,
9236 name);
9237 }
9238 }
9239 break;
9240
9241 case R_PPC_VLE_LO16A:
9242 relocation = relocation + addend;
9243 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9244 contents + rel->r_offset, relocation,
9245 split16a_type, htab->params->vle_reloc_fixup);
9246 goto copy_reloc;
9247
9248 case R_PPC_VLE_LO16D:
9249 relocation = relocation + addend;
9250 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9251 contents + rel->r_offset, relocation,
9252 split16d_type, htab->params->vle_reloc_fixup);
9253 goto copy_reloc;
9254
9255 case R_PPC_VLE_HI16A:
9256 relocation = (relocation + addend) >> 16;
9257 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9258 contents + rel->r_offset, relocation,
9259 split16a_type, htab->params->vle_reloc_fixup);
9260 goto copy_reloc;
9261
9262 case R_PPC_VLE_HI16D:
9263 relocation = (relocation + addend) >> 16;
9264 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9265 contents + rel->r_offset, relocation,
9266 split16d_type, htab->params->vle_reloc_fixup);
9267 goto copy_reloc;
9268
9269 case R_PPC_VLE_HA16A:
9270 relocation = (relocation + addend + 0x8000) >> 16;
9271 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9272 contents + rel->r_offset, relocation,
9273 split16a_type, htab->params->vle_reloc_fixup);
9274 goto copy_reloc;
9275
9276 case R_PPC_VLE_HA16D:
9277 relocation = (relocation + addend + 0x8000) >> 16;
9278 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9279 contents + rel->r_offset, relocation,
9280 split16d_type, htab->params->vle_reloc_fixup);
9281 goto copy_reloc;
9282
9283 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9284 case R_PPC_EMB_SDA21:
9285 case R_PPC_VLE_SDA21:
9286 case R_PPC_EMB_RELSDA:
9287 case R_PPC_VLE_SDA21_LO:
9288 {
9289 const char *name;
9290 int reg;
9291 unsigned int insn;
9292 struct elf_link_hash_entry *sda = NULL;
9293
9294 if (sec == NULL || sec->output_section == NULL)
9295 {
9296 unresolved_reloc = TRUE;
9297 break;
9298 }
9299
9300 name = bfd_get_section_name (output_bfd, sec->output_section);
9301 if (strcmp (name, ".sdata") == 0
9302 || strcmp (name, ".sbss") == 0)
9303 {
9304 reg = 13;
9305 sda = htab->sdata[0].sym;
9306 }
9307 else if (strcmp (name, ".sdata2") == 0
9308 || strcmp (name, ".sbss2") == 0)
9309 {
9310 reg = 2;
9311 sda = htab->sdata[1].sym;
9312 }
9313 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9314 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9315 {
9316 reg = 0;
9317 }
9318 else
9319 {
9320 info->callbacks->einfo
9321 /* xgettext:c-format */
9322 (_("%P: %B: the target (%s) of a %s relocation is "
9323 "in the wrong output section (%s)\n"),
9324 input_bfd,
9325 sym_name,
9326 howto->name,
9327 name);
9328
9329 bfd_set_error (bfd_error_bad_value);
9330 ret = FALSE;
9331 goto copy_reloc;
9332 }
9333
9334 if (sda != NULL)
9335 {
9336 if (!is_static_defined (sda))
9337 {
9338 unresolved_reloc = TRUE;
9339 break;
9340 }
9341 addend -= SYM_VAL (sda);
9342 }
9343
9344 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9345 if (reg == 0
9346 && (r_type == R_PPC_VLE_SDA21
9347 || r_type == R_PPC_VLE_SDA21_LO))
9348 {
9349 relocation = relocation + addend;
9350 addend = 0;
9351
9352 /* Force e_li insn, keeping RT from original insn. */
9353 insn &= 0x1f << 21;
9354 insn |= 28u << 26;
9355
9356 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9357 /* Top 4 bits of value to 17..20. */
9358 insn |= (relocation & 0xf0000) >> 5;
9359 /* Next 5 bits of the value to 11..15. */
9360 insn |= (relocation & 0xf800) << 5;
9361 /* And the final 11 bits of the value to bits 21 to 31. */
9362 insn |= relocation & 0x7ff;
9363
9364 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9365
9366 if (r_type == R_PPC_VLE_SDA21
9367 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9368 goto overflow;
9369 goto copy_reloc;
9370 }
9371 else if (r_type == R_PPC_EMB_SDA21
9372 || r_type == R_PPC_VLE_SDA21
9373 || r_type == R_PPC_VLE_SDA21_LO)
9374 {
9375 /* Fill in register field. */
9376 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9377 }
9378 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9379 }
9380 break;
9381
9382 case R_PPC_VLE_SDAREL_LO16A:
9383 case R_PPC_VLE_SDAREL_LO16D:
9384 case R_PPC_VLE_SDAREL_HI16A:
9385 case R_PPC_VLE_SDAREL_HI16D:
9386 case R_PPC_VLE_SDAREL_HA16A:
9387 case R_PPC_VLE_SDAREL_HA16D:
9388 {
9389 bfd_vma value;
9390 const char *name;
9391 //int reg;
9392 struct elf_link_hash_entry *sda = NULL;
9393
9394 if (sec == NULL || sec->output_section == NULL)
9395 {
9396 unresolved_reloc = TRUE;
9397 break;
9398 }
9399
9400 name = bfd_get_section_name (output_bfd, sec->output_section);
9401 if (strcmp (name, ".sdata") == 0
9402 || strcmp (name, ".sbss") == 0)
9403 {
9404 //reg = 13;
9405 sda = htab->sdata[0].sym;
9406 }
9407 else if (strcmp (name, ".sdata2") == 0
9408 || strcmp (name, ".sbss2") == 0)
9409 {
9410 //reg = 2;
9411 sda = htab->sdata[1].sym;
9412 }
9413 else
9414 {
9415 _bfd_error_handler
9416 /* xgettext:c-format */
9417 (_("%B: the target (%s) of a %s relocation is "
9418 "in the wrong output section (%s)"),
9419 input_bfd,
9420 sym_name,
9421 howto->name,
9422 name);
9423
9424 bfd_set_error (bfd_error_bad_value);
9425 ret = FALSE;
9426 goto copy_reloc;
9427 }
9428
9429 if (sda != NULL)
9430 {
9431 if (!is_static_defined (sda))
9432 {
9433 unresolved_reloc = TRUE;
9434 break;
9435 }
9436 }
9437
9438 value = (sda->root.u.def.section->output_section->vma
9439 + sda->root.u.def.section->output_offset
9440 + addend);
9441
9442 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9443 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9444 contents + rel->r_offset, value,
9445 split16a_type,
9446 htab->params->vle_reloc_fixup);
9447 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9448 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9449 contents + rel->r_offset, value,
9450 split16d_type,
9451 htab->params->vle_reloc_fixup);
9452 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9453 {
9454 value = value >> 16;
9455 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9456 contents + rel->r_offset, value,
9457 split16a_type,
9458 htab->params->vle_reloc_fixup);
9459 }
9460 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9461 {
9462 value = value >> 16;
9463 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9464 contents + rel->r_offset, value,
9465 split16d_type,
9466 htab->params->vle_reloc_fixup);
9467 }
9468 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9469 {
9470 value = (value + 0x8000) >> 16;
9471 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9472 contents + rel->r_offset, value,
9473 split16a_type,
9474 htab->params->vle_reloc_fixup);
9475 }
9476 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9477 {
9478 value = (value + 0x8000) >> 16;
9479 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9480 contents + rel->r_offset, value,
9481 split16d_type,
9482 htab->params->vle_reloc_fixup);
9483 }
9484 }
9485 goto copy_reloc;
9486
9487 /* Relocate against the beginning of the section. */
9488 case R_PPC_SECTOFF:
9489 case R_PPC_SECTOFF_LO:
9490 case R_PPC_SECTOFF_HI:
9491 case R_PPC_SECTOFF_HA:
9492 if (sec == NULL || sec->output_section == NULL)
9493 {
9494 unresolved_reloc = TRUE;
9495 break;
9496 }
9497 addend -= sec->output_section->vma;
9498 break;
9499
9500 /* Negative relocations. */
9501 case R_PPC_EMB_NADDR32:
9502 case R_PPC_EMB_NADDR16:
9503 case R_PPC_EMB_NADDR16_LO:
9504 case R_PPC_EMB_NADDR16_HI:
9505 case R_PPC_EMB_NADDR16_HA:
9506 addend -= 2 * relocation;
9507 break;
9508
9509 case R_PPC_COPY:
9510 case R_PPC_GLOB_DAT:
9511 case R_PPC_JMP_SLOT:
9512 case R_PPC_RELATIVE:
9513 case R_PPC_IRELATIVE:
9514 case R_PPC_PLT32:
9515 case R_PPC_PLTREL32:
9516 case R_PPC_PLT16_LO:
9517 case R_PPC_PLT16_HI:
9518 case R_PPC_PLT16_HA:
9519 case R_PPC_ADDR30:
9520 case R_PPC_EMB_RELSEC16:
9521 case R_PPC_EMB_RELST_LO:
9522 case R_PPC_EMB_RELST_HI:
9523 case R_PPC_EMB_RELST_HA:
9524 case R_PPC_EMB_BIT_FLD:
9525 info->callbacks->einfo
9526 /* xgettext:c-format */
9527 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9528 input_bfd,
9529 howto->name,
9530 sym_name);
9531
9532 bfd_set_error (bfd_error_invalid_operation);
9533 ret = FALSE;
9534 goto copy_reloc;
9535 }
9536
9537 /* Do any further special processing. */
9538 switch (r_type)
9539 {
9540 default:
9541 break;
9542
9543 case R_PPC_ADDR16_HA:
9544 case R_PPC_REL16_HA:
9545 case R_PPC_REL16DX_HA:
9546 case R_PPC_SECTOFF_HA:
9547 case R_PPC_TPREL16_HA:
9548 case R_PPC_DTPREL16_HA:
9549 case R_PPC_EMB_NADDR16_HA:
9550 case R_PPC_EMB_RELST_HA:
9551 /* It's just possible that this symbol is a weak symbol
9552 that's not actually defined anywhere. In that case,
9553 'sec' would be NULL, and we should leave the symbol
9554 alone (it will be set to zero elsewhere in the link). */
9555 if (sec == NULL)
9556 break;
9557 /* Fall through. */
9558
9559 case R_PPC_PLT16_HA:
9560 case R_PPC_GOT16_HA:
9561 case R_PPC_GOT_TLSGD16_HA:
9562 case R_PPC_GOT_TLSLD16_HA:
9563 case R_PPC_GOT_TPREL16_HA:
9564 case R_PPC_GOT_DTPREL16_HA:
9565 /* Add 0x10000 if sign bit in 0:15 is set.
9566 Bits 0:15 are not used. */
9567 addend += 0x8000;
9568 break;
9569
9570 case R_PPC_ADDR16:
9571 case R_PPC_ADDR16_LO:
9572 case R_PPC_GOT16:
9573 case R_PPC_GOT16_LO:
9574 case R_PPC_SDAREL16:
9575 case R_PPC_SECTOFF:
9576 case R_PPC_SECTOFF_LO:
9577 case R_PPC_DTPREL16:
9578 case R_PPC_DTPREL16_LO:
9579 case R_PPC_TPREL16:
9580 case R_PPC_TPREL16_LO:
9581 case R_PPC_GOT_TLSGD16:
9582 case R_PPC_GOT_TLSGD16_LO:
9583 case R_PPC_GOT_TLSLD16:
9584 case R_PPC_GOT_TLSLD16_LO:
9585 case R_PPC_GOT_DTPREL16:
9586 case R_PPC_GOT_DTPREL16_LO:
9587 case R_PPC_GOT_TPREL16:
9588 case R_PPC_GOT_TPREL16_LO:
9589 {
9590 /* The 32-bit ABI lacks proper relocations to deal with
9591 certain 64-bit instructions. Prevent damage to bits
9592 that make up part of the insn opcode. */
9593 unsigned int insn, mask, lobit;
9594
9595 insn = bfd_get_32 (input_bfd,
9596 contents + rel->r_offset - d_offset);
9597 mask = 0;
9598 if (is_insn_ds_form (insn))
9599 mask = 3;
9600 else if (is_insn_dq_form (insn))
9601 mask = 15;
9602 else
9603 break;
9604 relocation += addend;
9605 addend = insn & mask;
9606 lobit = mask & relocation;
9607 if (lobit != 0)
9608 {
9609 relocation ^= lobit;
9610 info->callbacks->einfo
9611 /* xgettext:c-format */
9612 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9613 input_bfd, input_section, rel->r_offset,
9614 howto->name, sym_name, mask + 1);
9615 bfd_set_error (bfd_error_bad_value);
9616 ret = FALSE;
9617 }
9618 }
9619 break;
9620 }
9621
9622 #ifdef DEBUG
9623 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9624 "offset = %ld, addend = %ld\n",
9625 howto->name,
9626 (int) r_type,
9627 sym_name,
9628 r_symndx,
9629 (long) rel->r_offset,
9630 (long) addend);
9631 #endif
9632
9633 if (unresolved_reloc
9634 && !((input_section->flags & SEC_DEBUGGING) != 0
9635 && h->def_dynamic)
9636 && _bfd_elf_section_offset (output_bfd, info, input_section,
9637 rel->r_offset) != (bfd_vma) -1)
9638 {
9639 info->callbacks->einfo
9640 /* xgettext:c-format */
9641 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9642 input_bfd, input_section, rel->r_offset,
9643 howto->name,
9644 sym_name);
9645 ret = FALSE;
9646 }
9647
9648 /* 16-bit fields in insns mostly have signed values, but a
9649 few insns have 16-bit unsigned values. Really, we should
9650 have different reloc types. */
9651 if (howto->complain_on_overflow != complain_overflow_dont
9652 && howto->dst_mask == 0xffff
9653 && (input_section->flags & SEC_CODE) != 0)
9654 {
9655 enum complain_overflow complain = complain_overflow_signed;
9656
9657 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9658 {
9659 unsigned int insn;
9660
9661 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9662 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9663 complain = complain_overflow_bitfield;
9664 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9665 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9666 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9667 complain = complain_overflow_unsigned;
9668 }
9669 if (howto->complain_on_overflow != complain)
9670 {
9671 alt_howto = *howto;
9672 alt_howto.complain_on_overflow = complain;
9673 howto = &alt_howto;
9674 }
9675 }
9676
9677 if (r_type == R_PPC_REL16DX_HA)
9678 {
9679 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9680 if (rel->r_offset + 4 > input_section->size)
9681 r = bfd_reloc_outofrange;
9682 else
9683 {
9684 unsigned int insn;
9685
9686 relocation += addend;
9687 relocation -= (rel->r_offset
9688 + input_section->output_offset
9689 + input_section->output_section->vma);
9690 relocation >>= 16;
9691 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9692 insn &= ~0x1fffc1;
9693 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9694 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9695 r = bfd_reloc_ok;
9696 }
9697 }
9698 else
9699 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9700 rel->r_offset, relocation, addend);
9701
9702 if (r != bfd_reloc_ok)
9703 {
9704 if (r == bfd_reloc_overflow)
9705 {
9706 overflow:
9707 /* On code like "if (foo) foo();" don't report overflow
9708 on a branch to zero when foo is undefined. */
9709 if (!warned
9710 && !(h != NULL
9711 && (h->root.type == bfd_link_hash_undefweak
9712 || h->root.type == bfd_link_hash_undefined)
9713 && is_branch_reloc (r_type)))
9714 info->callbacks->reloc_overflow
9715 (info, (h ? &h->root : NULL), sym_name, howto->name,
9716 rel->r_addend, input_bfd, input_section, rel->r_offset);
9717 }
9718 else
9719 {
9720 info->callbacks->einfo
9721 /* xgettext:c-format */
9722 (_("%P: %H: %s reloc against `%s': error %d\n"),
9723 input_bfd, input_section, rel->r_offset,
9724 howto->name, sym_name, (int) r);
9725 ret = FALSE;
9726 }
9727 }
9728 copy_reloc:
9729 if (wrel != rel)
9730 *wrel = *rel;
9731 }
9732
9733 if (wrel != rel)
9734 {
9735 Elf_Internal_Shdr *rel_hdr;
9736 size_t deleted = rel - wrel;
9737
9738 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9739 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9740 if (rel_hdr->sh_size == 0)
9741 {
9742 /* It is too late to remove an empty reloc section. Leave
9743 one NONE reloc.
9744 ??? What is wrong with an empty section??? */
9745 rel_hdr->sh_size = rel_hdr->sh_entsize;
9746 deleted -= 1;
9747 wrel++;
9748 }
9749 relend = wrel;
9750 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9751 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9752 input_section->reloc_count -= deleted;
9753 }
9754
9755 #ifdef DEBUG
9756 fprintf (stderr, "\n");
9757 #endif
9758
9759 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9760 && input_section->size != input_section->rawsize
9761 && (strcmp (input_section->output_section->name, ".init") == 0
9762 || strcmp (input_section->output_section->name, ".fini") == 0))
9763 {
9764 /* Branch around the trampolines. */
9765 unsigned int insn = B + input_section->size - input_section->rawsize;
9766 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9767 }
9768
9769 if (htab->params->ppc476_workaround
9770 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9771 && (!bfd_link_relocatable (info)
9772 || (input_section->output_section->alignment_power
9773 >= htab->params->pagesize_p2)))
9774 {
9775 bfd_vma start_addr, end_addr, addr;
9776 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9777
9778 if (relax_info->workaround_size != 0)
9779 {
9780 bfd_byte *p;
9781 unsigned int n;
9782 bfd_byte fill[4];
9783
9784 bfd_put_32 (input_bfd, BA, fill);
9785 p = contents + input_section->size - relax_info->workaround_size;
9786 n = relax_info->workaround_size >> 2;
9787 while (n--)
9788 {
9789 memcpy (p, fill, 4);
9790 p += 4;
9791 }
9792 }
9793
9794 /* The idea is: Replace the last instruction on a page with a
9795 branch to a patch area. Put the insn there followed by a
9796 branch back to the next page. Complicated a little by
9797 needing to handle moved conditional branches, and by not
9798 wanting to touch data-in-text. */
9799
9800 start_addr = (input_section->output_section->vma
9801 + input_section->output_offset);
9802 end_addr = (start_addr + input_section->size
9803 - relax_info->workaround_size);
9804 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9805 addr < end_addr;
9806 addr += pagesize)
9807 {
9808 bfd_vma offset = addr - start_addr;
9809 Elf_Internal_Rela *lo, *hi;
9810 bfd_boolean is_data;
9811 bfd_vma patch_off, patch_addr;
9812 unsigned int insn;
9813
9814 /* Do we have a data reloc at this offset? If so, leave
9815 the word alone. */
9816 is_data = FALSE;
9817 lo = relocs;
9818 hi = relend;
9819 rel = NULL;
9820 while (lo < hi)
9821 {
9822 rel = lo + (hi - lo) / 2;
9823 if (rel->r_offset < offset)
9824 lo = rel + 1;
9825 else if (rel->r_offset > offset + 3)
9826 hi = rel;
9827 else
9828 {
9829 switch (ELF32_R_TYPE (rel->r_info))
9830 {
9831 case R_PPC_ADDR32:
9832 case R_PPC_UADDR32:
9833 case R_PPC_REL32:
9834 case R_PPC_ADDR30:
9835 is_data = TRUE;
9836 break;
9837 default:
9838 break;
9839 }
9840 break;
9841 }
9842 }
9843 if (is_data)
9844 continue;
9845
9846 /* Some instructions can be left alone too. Unconditional
9847 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9848 avoid the icache failure.
9849
9850 The problem occurs due to prefetch across a page boundary
9851 where stale instructions can be fetched from the next
9852 page, and the mechanism for flushing these bad
9853 instructions fails under certain circumstances. The
9854 unconditional branches:
9855 1) Branch: b, bl, ba, bla,
9856 2) Branch Conditional: bc, bca, bcl, bcla,
9857 3) Branch Conditional to Link Register: bclr, bclrl,
9858 where (2) and (3) have BO=0x14 making them unconditional,
9859 prevent the bad prefetch because the prefetch itself is
9860 affected by these instructions. This happens even if the
9861 instruction is not executed.
9862
9863 A bctr example:
9864 .
9865 . lis 9,new_page@ha
9866 . addi 9,9,new_page@l
9867 . mtctr 9
9868 . bctr
9869 . nop
9870 . nop
9871 . new_page:
9872 .
9873 The bctr is not predicted taken due to ctr not being
9874 ready, so prefetch continues on past the bctr into the
9875 new page which might have stale instructions. If they
9876 fail to be flushed, then they will be executed after the
9877 bctr executes. Either of the following modifications
9878 prevent the bad prefetch from happening in the first
9879 place:
9880 .
9881 . lis 9,new_page@ha lis 9,new_page@ha
9882 . addi 9,9,new_page@l addi 9,9,new_page@l
9883 . mtctr 9 mtctr 9
9884 . bctr bctr
9885 . nop b somewhere_else
9886 . b somewhere_else nop
9887 . new_page: new_page:
9888 . */
9889 insn = bfd_get_32 (input_bfd, contents + offset);
9890 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9891 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9892 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9893 || ((insn & (0x3f << 26)) == (19u << 26)
9894 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9895 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9896 continue;
9897
9898 patch_addr = (start_addr + input_section->size
9899 - relax_info->workaround_size);
9900 patch_addr = (patch_addr + 15) & -16;
9901 patch_off = patch_addr - start_addr;
9902 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9903
9904 if (rel != NULL
9905 && rel->r_offset >= offset
9906 && rel->r_offset < offset + 4)
9907 {
9908 asection *sreloc;
9909
9910 /* If the insn we are patching had a reloc, adjust the
9911 reloc r_offset so that the reloc applies to the moved
9912 location. This matters for -r and --emit-relocs. */
9913 if (rel + 1 != relend)
9914 {
9915 Elf_Internal_Rela tmp = *rel;
9916
9917 /* Keep the relocs sorted by r_offset. */
9918 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9919 relend[-1] = tmp;
9920 }
9921 relend[-1].r_offset += patch_off - offset;
9922
9923 /* Adjust REL16 addends too. */
9924 switch (ELF32_R_TYPE (relend[-1].r_info))
9925 {
9926 case R_PPC_REL16:
9927 case R_PPC_REL16_LO:
9928 case R_PPC_REL16_HI:
9929 case R_PPC_REL16_HA:
9930 relend[-1].r_addend += patch_off - offset;
9931 break;
9932 default:
9933 break;
9934 }
9935
9936 /* If we are building a PIE or shared library with
9937 non-PIC objects, perhaps we had a dynamic reloc too?
9938 If so, the dynamic reloc must move with the insn. */
9939 sreloc = elf_section_data (input_section)->sreloc;
9940 if (sreloc != NULL)
9941 {
9942 Elf32_External_Rela *slo, *shi, *srelend;
9943 bfd_vma soffset;
9944
9945 slo = (Elf32_External_Rela *) sreloc->contents;
9946 shi = srelend = slo + sreloc->reloc_count;
9947 soffset = (offset + input_section->output_section->vma
9948 + input_section->output_offset);
9949 while (slo < shi)
9950 {
9951 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9952 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9953 &outrel);
9954 if (outrel.r_offset < soffset)
9955 slo = srel + 1;
9956 else if (outrel.r_offset > soffset + 3)
9957 shi = srel;
9958 else
9959 {
9960 if (srel + 1 != srelend)
9961 {
9962 memmove (srel, srel + 1,
9963 (srelend - (srel + 1)) * sizeof (*srel));
9964 srel = srelend - 1;
9965 }
9966 outrel.r_offset += patch_off - offset;
9967 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9968 (bfd_byte *) srel);
9969 break;
9970 }
9971 }
9972 }
9973 }
9974 else
9975 rel = NULL;
9976
9977 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9978 && (insn & 2) == 0 /* relative */)
9979 {
9980 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9981
9982 delta += offset - patch_off;
9983 if (bfd_link_relocatable (info) && rel != NULL)
9984 delta = 0;
9985 if (!bfd_link_relocatable (info) && rel != NULL)
9986 {
9987 enum elf_ppc_reloc_type r_type;
9988
9989 r_type = ELF32_R_TYPE (relend[-1].r_info);
9990 if (r_type == R_PPC_REL14_BRTAKEN)
9991 insn |= BRANCH_PREDICT_BIT;
9992 else if (r_type == R_PPC_REL14_BRNTAKEN)
9993 insn &= ~BRANCH_PREDICT_BIT;
9994 else
9995 BFD_ASSERT (r_type == R_PPC_REL14);
9996
9997 if ((r_type == R_PPC_REL14_BRTAKEN
9998 || r_type == R_PPC_REL14_BRNTAKEN)
9999 && delta + 0x8000 < 0x10000
10000 && (bfd_signed_vma) delta < 0)
10001 insn ^= BRANCH_PREDICT_BIT;
10002 }
10003 if (delta + 0x8000 < 0x10000)
10004 {
10005 bfd_put_32 (input_bfd,
10006 (insn & ~0xfffc) | (delta & 0xfffc),
10007 contents + patch_off);
10008 patch_off += 4;
10009 bfd_put_32 (input_bfd,
10010 B | ((offset + 4 - patch_off) & 0x3fffffc),
10011 contents + patch_off);
10012 patch_off += 4;
10013 }
10014 else
10015 {
10016 if (rel != NULL)
10017 {
10018 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10019
10020 relend[-1].r_offset += 8;
10021 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10022 }
10023 bfd_put_32 (input_bfd,
10024 (insn & ~0xfffc) | 8,
10025 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 bfd_put_32 (input_bfd,
10032 B | ((delta - 8) & 0x3fffffc),
10033 contents + patch_off);
10034 patch_off += 4;
10035 }
10036 }
10037 else
10038 {
10039 bfd_put_32 (input_bfd, insn, contents + patch_off);
10040 patch_off += 4;
10041 bfd_put_32 (input_bfd,
10042 B | ((offset + 4 - patch_off) & 0x3fffffc),
10043 contents + patch_off);
10044 patch_off += 4;
10045 }
10046 BFD_ASSERT (patch_off <= input_section->size);
10047 relax_info->workaround_size = input_section->size - patch_off;
10048 }
10049 }
10050
10051 return ret;
10052 }
10053 \f
10054 /* Finish up dynamic symbol handling. We set the contents of various
10055 dynamic sections here. */
10056
10057 static bfd_boolean
10058 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10059 struct bfd_link_info *info,
10060 struct elf_link_hash_entry *h,
10061 Elf_Internal_Sym *sym)
10062 {
10063 struct ppc_elf_link_hash_table *htab;
10064 struct plt_entry *ent;
10065 bfd_boolean doneone;
10066
10067 #ifdef DEBUG
10068 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10069 h->root.root.string);
10070 #endif
10071
10072 htab = ppc_elf_hash_table (info);
10073 BFD_ASSERT (htab->elf.dynobj != NULL);
10074
10075 doneone = FALSE;
10076 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10077 if (ent->plt.offset != (bfd_vma) -1)
10078 {
10079 if (!doneone)
10080 {
10081 Elf_Internal_Rela rela;
10082 bfd_byte *loc;
10083 bfd_vma reloc_index;
10084
10085 if (htab->plt_type == PLT_NEW
10086 || !htab->elf.dynamic_sections_created
10087 || h->dynindx == -1)
10088 reloc_index = ent->plt.offset / 4;
10089 else
10090 {
10091 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10092 / htab->plt_slot_size);
10093 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10094 && htab->plt_type == PLT_OLD)
10095 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10096 }
10097
10098 /* This symbol has an entry in the procedure linkage table.
10099 Set it up. */
10100 if (htab->plt_type == PLT_VXWORKS
10101 && htab->elf.dynamic_sections_created
10102 && h->dynindx != -1)
10103 {
10104 bfd_vma got_offset;
10105 const bfd_vma *plt_entry;
10106
10107 /* The first three entries in .got.plt are reserved. */
10108 got_offset = (reloc_index + 3) * 4;
10109
10110 /* Use the right PLT. */
10111 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10112 : ppc_elf_vxworks_plt_entry;
10113
10114 /* Fill in the .plt on VxWorks. */
10115 if (bfd_link_pic (info))
10116 {
10117 bfd_put_32 (output_bfd,
10118 plt_entry[0] | PPC_HA (got_offset),
10119 htab->elf.splt->contents + ent->plt.offset + 0);
10120 bfd_put_32 (output_bfd,
10121 plt_entry[1] | PPC_LO (got_offset),
10122 htab->elf.splt->contents + ent->plt.offset + 4);
10123 }
10124 else
10125 {
10126 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10127
10128 bfd_put_32 (output_bfd,
10129 plt_entry[0] | PPC_HA (got_loc),
10130 htab->elf.splt->contents + ent->plt.offset + 0);
10131 bfd_put_32 (output_bfd,
10132 plt_entry[1] | PPC_LO (got_loc),
10133 htab->elf.splt->contents + ent->plt.offset + 4);
10134 }
10135
10136 bfd_put_32 (output_bfd, plt_entry[2],
10137 htab->elf.splt->contents + ent->plt.offset + 8);
10138 bfd_put_32 (output_bfd, plt_entry[3],
10139 htab->elf.splt->contents + ent->plt.offset + 12);
10140
10141 /* This instruction is an immediate load. The value loaded is
10142 the byte offset of the R_PPC_JMP_SLOT relocation from the
10143 start of the .rela.plt section. The value is stored in the
10144 low-order 16 bits of the load instruction. */
10145 /* NOTE: It appears that this is now an index rather than a
10146 prescaled offset. */
10147 bfd_put_32 (output_bfd,
10148 plt_entry[4] | reloc_index,
10149 htab->elf.splt->contents + ent->plt.offset + 16);
10150 /* This instruction is a PC-relative branch whose target is
10151 the start of the PLT section. The address of this branch
10152 instruction is 20 bytes beyond the start of this PLT entry.
10153 The address is encoded in bits 6-29, inclusive. The value
10154 stored is right-shifted by two bits, permitting a 26-bit
10155 offset. */
10156 bfd_put_32 (output_bfd,
10157 (plt_entry[5]
10158 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10159 htab->elf.splt->contents + ent->plt.offset + 20);
10160 bfd_put_32 (output_bfd, plt_entry[6],
10161 htab->elf.splt->contents + ent->plt.offset + 24);
10162 bfd_put_32 (output_bfd, plt_entry[7],
10163 htab->elf.splt->contents + ent->plt.offset + 28);
10164
10165 /* Fill in the GOT entry corresponding to this PLT slot with
10166 the address immediately after the "bctr" instruction
10167 in this PLT entry. */
10168 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10169 + htab->elf.splt->output_offset
10170 + ent->plt.offset + 16),
10171 htab->elf.sgotplt->contents + got_offset);
10172
10173 if (!bfd_link_pic (info))
10174 {
10175 /* Fill in a couple of entries in .rela.plt.unloaded. */
10176 loc = htab->srelplt2->contents
10177 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10178 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10179 * sizeof (Elf32_External_Rela));
10180
10181 /* Provide the @ha relocation for the first instruction. */
10182 rela.r_offset = (htab->elf.splt->output_section->vma
10183 + htab->elf.splt->output_offset
10184 + ent->plt.offset + 2);
10185 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10186 R_PPC_ADDR16_HA);
10187 rela.r_addend = got_offset;
10188 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10189 loc += sizeof (Elf32_External_Rela);
10190
10191 /* Provide the @l relocation for the second instruction. */
10192 rela.r_offset = (htab->elf.splt->output_section->vma
10193 + htab->elf.splt->output_offset
10194 + ent->plt.offset + 6);
10195 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10196 R_PPC_ADDR16_LO);
10197 rela.r_addend = got_offset;
10198 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10199 loc += sizeof (Elf32_External_Rela);
10200
10201 /* Provide a relocation for the GOT entry corresponding to this
10202 PLT slot. Point it at the middle of the .plt entry. */
10203 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10204 + htab->elf.sgotplt->output_offset
10205 + got_offset);
10206 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10207 R_PPC_ADDR32);
10208 rela.r_addend = ent->plt.offset + 16;
10209 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10210 }
10211
10212 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10213 In particular, the offset for the relocation is not the
10214 address of the PLT entry for this function, as specified
10215 by the ABI. Instead, the offset is set to the address of
10216 the GOT slot for this function. See EABI 4.4.4.1. */
10217 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10218 + htab->elf.sgotplt->output_offset
10219 + got_offset);
10220
10221 }
10222 else
10223 {
10224 asection *splt = htab->elf.splt;
10225 if (!htab->elf.dynamic_sections_created
10226 || h->dynindx == -1)
10227 splt = htab->elf.iplt;
10228
10229 rela.r_offset = (splt->output_section->vma
10230 + splt->output_offset
10231 + ent->plt.offset);
10232 if (htab->plt_type == PLT_OLD
10233 || !htab->elf.dynamic_sections_created
10234 || h->dynindx == -1)
10235 {
10236 /* We don't need to fill in the .plt. The ppc dynamic
10237 linker will fill it in. */
10238 }
10239 else
10240 {
10241 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10242 + htab->glink->output_section->vma
10243 + htab->glink->output_offset);
10244 bfd_put_32 (output_bfd, val,
10245 splt->contents + ent->plt.offset);
10246 }
10247 }
10248
10249 /* Fill in the entry in the .rela.plt section. */
10250 rela.r_addend = 0;
10251 if (!htab->elf.dynamic_sections_created
10252 || h->dynindx == -1)
10253 {
10254 BFD_ASSERT (h->type == STT_GNU_IFUNC
10255 && h->def_regular
10256 && (h->root.type == bfd_link_hash_defined
10257 || h->root.type == bfd_link_hash_defweak));
10258 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10259 rela.r_addend = SYM_VAL (h);
10260 }
10261 else
10262 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10263
10264 if (!htab->elf.dynamic_sections_created
10265 || h->dynindx == -1)
10266 loc = (htab->elf.irelplt->contents
10267 + (htab->elf.irelplt->reloc_count++
10268 * sizeof (Elf32_External_Rela)));
10269 else
10270 loc = (htab->elf.srelplt->contents
10271 + reloc_index * sizeof (Elf32_External_Rela));
10272 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10273
10274 if (!h->def_regular)
10275 {
10276 /* Mark the symbol as undefined, rather than as
10277 defined in the .plt section. Leave the value if
10278 there were any relocations where pointer equality
10279 matters (this is a clue for the dynamic linker, to
10280 make function pointer comparisons work between an
10281 application and shared library), otherwise set it
10282 to zero. */
10283 sym->st_shndx = SHN_UNDEF;
10284 if (!h->pointer_equality_needed)
10285 sym->st_value = 0;
10286 else if (!h->ref_regular_nonweak)
10287 {
10288 /* This breaks function pointer comparisons, but
10289 that is better than breaking tests for a NULL
10290 function pointer. */
10291 sym->st_value = 0;
10292 }
10293 }
10294 else if (h->type == STT_GNU_IFUNC
10295 && !bfd_link_pic (info))
10296 {
10297 /* Set the value of ifunc symbols in a non-pie
10298 executable to the glink entry. This is to avoid
10299 text relocations. We can't do this for ifunc in
10300 allocate_dynrelocs, as we do for normal dynamic
10301 function symbols with plt entries, because we need
10302 to keep the original value around for the ifunc
10303 relocation. */
10304 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10305 (output_bfd, htab->glink->output_section));
10306 sym->st_value = (ent->glink_offset
10307 + htab->glink->output_offset
10308 + htab->glink->output_section->vma);
10309 }
10310 doneone = TRUE;
10311 }
10312
10313 if (htab->plt_type == PLT_NEW
10314 || !htab->elf.dynamic_sections_created
10315 || h->dynindx == -1)
10316 {
10317 unsigned char *p;
10318 asection *splt = htab->elf.splt;
10319 if (!htab->elf.dynamic_sections_created
10320 || h->dynindx == -1)
10321 splt = htab->elf.iplt;
10322
10323 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10324
10325 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10326 {
10327 bfd_put_32 (output_bfd, LWZ_11_3, p);
10328 p += 4;
10329 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10330 p += 4;
10331 bfd_put_32 (output_bfd, MR_0_3, p);
10332 p += 4;
10333 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10334 p += 4;
10335 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10336 p += 4;
10337 bfd_put_32 (output_bfd, BEQLR, p);
10338 p += 4;
10339 bfd_put_32 (output_bfd, MR_3_0, p);
10340 p += 4;
10341 bfd_put_32 (output_bfd, NOP, p);
10342 p += 4;
10343 }
10344
10345 write_glink_stub (ent, splt, p, info);
10346
10347 if (!bfd_link_pic (info))
10348 /* We only need one non-PIC glink stub. */
10349 break;
10350 }
10351 else
10352 break;
10353 }
10354
10355 if (h->needs_copy)
10356 {
10357 asection *s;
10358 Elf_Internal_Rela rela;
10359 bfd_byte *loc;
10360
10361 /* This symbols needs a copy reloc. Set it up. */
10362
10363 #ifdef DEBUG
10364 fprintf (stderr, ", copy");
10365 #endif
10366
10367 BFD_ASSERT (h->dynindx != -1);
10368
10369 if (ppc_elf_hash_entry (h)->has_sda_refs)
10370 s = htab->relsbss;
10371 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
10372 s = htab->elf.sreldynrelro;
10373 else
10374 s = htab->elf.srelbss;
10375 BFD_ASSERT (s != NULL);
10376
10377 rela.r_offset = SYM_VAL (h);
10378 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10379 rela.r_addend = 0;
10380 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10381 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10382 }
10383
10384 #ifdef DEBUG
10385 fprintf (stderr, "\n");
10386 #endif
10387
10388 return TRUE;
10389 }
10390 \f
10391 static enum elf_reloc_type_class
10392 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10393 const asection *rel_sec,
10394 const Elf_Internal_Rela *rela)
10395 {
10396 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10397
10398 if (rel_sec == htab->elf.irelplt)
10399 return reloc_class_ifunc;
10400
10401 switch (ELF32_R_TYPE (rela->r_info))
10402 {
10403 case R_PPC_RELATIVE:
10404 return reloc_class_relative;
10405 case R_PPC_JMP_SLOT:
10406 return reloc_class_plt;
10407 case R_PPC_COPY:
10408 return reloc_class_copy;
10409 default:
10410 return reloc_class_normal;
10411 }
10412 }
10413 \f
10414 /* Finish up the dynamic sections. */
10415
10416 static bfd_boolean
10417 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10418 struct bfd_link_info *info)
10419 {
10420 asection *sdyn;
10421 asection *splt;
10422 struct ppc_elf_link_hash_table *htab;
10423 bfd_vma got;
10424 bfd *dynobj;
10425 bfd_boolean ret = TRUE;
10426
10427 #ifdef DEBUG
10428 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10429 #endif
10430
10431 htab = ppc_elf_hash_table (info);
10432 dynobj = htab->elf.dynobj;
10433 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10434 if (htab->is_vxworks)
10435 splt = htab->elf.splt;
10436 else
10437 splt = NULL;
10438
10439 got = 0;
10440 if (htab->elf.hgot != NULL)
10441 got = SYM_VAL (htab->elf.hgot);
10442
10443 if (htab->elf.dynamic_sections_created)
10444 {
10445 Elf32_External_Dyn *dyncon, *dynconend;
10446
10447 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10448
10449 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10450 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10451 for (; dyncon < dynconend; dyncon++)
10452 {
10453 Elf_Internal_Dyn dyn;
10454 asection *s;
10455
10456 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10457
10458 switch (dyn.d_tag)
10459 {
10460 case DT_PLTGOT:
10461 if (htab->is_vxworks)
10462 s = htab->elf.sgotplt;
10463 else
10464 s = htab->elf.splt;
10465 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10466 break;
10467
10468 case DT_PLTRELSZ:
10469 dyn.d_un.d_val = htab->elf.srelplt->size;
10470 break;
10471
10472 case DT_JMPREL:
10473 s = htab->elf.srelplt;
10474 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10475 break;
10476
10477 case DT_PPC_GOT:
10478 dyn.d_un.d_ptr = got;
10479 break;
10480
10481 default:
10482 if (htab->is_vxworks
10483 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10484 break;
10485 continue;
10486 }
10487
10488 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10489 }
10490 }
10491
10492 if (htab->elf.sgot != NULL)
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 (splt && splt->size > 0)
10535 {
10536 /* Use the right PLT. */
10537 const bfd_vma *plt_entry = (bfd_link_pic (info)
10538 ? ppc_elf_vxworks_pic_plt0_entry
10539 : ppc_elf_vxworks_plt0_entry);
10540
10541 if (!bfd_link_pic (info))
10542 {
10543 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10544
10545 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10546 splt->contents + 0);
10547 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10548 splt->contents + 4);
10549 }
10550 else
10551 {
10552 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10553 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10554 }
10555 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10556 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10557 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10558 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10559 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10560 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10561
10562 if (! bfd_link_pic (info))
10563 {
10564 Elf_Internal_Rela rela;
10565 bfd_byte *loc;
10566
10567 loc = htab->srelplt2->contents;
10568
10569 /* Output the @ha relocation for the first instruction. */
10570 rela.r_offset = (htab->elf.splt->output_section->vma
10571 + htab->elf.splt->output_offset
10572 + 2);
10573 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10574 rela.r_addend = 0;
10575 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10576 loc += sizeof (Elf32_External_Rela);
10577
10578 /* Output the @l relocation for the second instruction. */
10579 rela.r_offset = (htab->elf.splt->output_section->vma
10580 + htab->elf.splt->output_offset
10581 + 6);
10582 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10583 rela.r_addend = 0;
10584 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10585 loc += sizeof (Elf32_External_Rela);
10586
10587 /* Fix up the remaining relocations. They may have the wrong
10588 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10589 in which symbols were output. */
10590 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10591 {
10592 Elf_Internal_Rela rel;
10593
10594 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10595 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10596 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10597 loc += sizeof (Elf32_External_Rela);
10598
10599 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10600 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10601 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10602 loc += sizeof (Elf32_External_Rela);
10603
10604 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10605 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10606 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10607 loc += sizeof (Elf32_External_Rela);
10608 }
10609 }
10610 }
10611
10612 if (htab->glink != NULL
10613 && htab->glink->contents != NULL
10614 && htab->elf.dynamic_sections_created)
10615 {
10616 unsigned char *p;
10617 unsigned char *endp;
10618 bfd_vma res0;
10619 unsigned int i;
10620
10621 /*
10622 * PIC glink code is the following:
10623 *
10624 * # ith PLT code stub.
10625 * addis 11,30,(plt+(i-1)*4-got)@ha
10626 * lwz 11,(plt+(i-1)*4-got)@l(11)
10627 * mtctr 11
10628 * bctr
10629 *
10630 * # A table of branches, one for each plt entry.
10631 * # The idea is that the plt call stub loads ctr and r11 with these
10632 * # addresses, so (r11 - res_0) gives the plt index * 4.
10633 * res_0: b PLTresolve
10634 * res_1: b PLTresolve
10635 * .
10636 * # Some number of entries towards the end can be nops
10637 * res_n_m3: nop
10638 * res_n_m2: nop
10639 * res_n_m1:
10640 *
10641 * PLTresolve:
10642 * addis 11,11,(1f-res_0)@ha
10643 * mflr 0
10644 * bcl 20,31,1f
10645 * 1: addi 11,11,(1b-res_0)@l
10646 * mflr 12
10647 * mtlr 0
10648 * sub 11,11,12 # r11 = index * 4
10649 * addis 12,12,(got+4-1b)@ha
10650 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10651 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10652 * mtctr 0
10653 * add 0,11,11
10654 * add 11,0,11 # r11 = index * 12 = reloc offset.
10655 * bctr
10656 */
10657 static const unsigned int pic_plt_resolve[] =
10658 {
10659 ADDIS_11_11,
10660 MFLR_0,
10661 BCL_20_31,
10662 ADDI_11_11,
10663 MFLR_12,
10664 MTLR_0,
10665 SUB_11_11_12,
10666 ADDIS_12_12,
10667 LWZ_0_12,
10668 LWZ_12_12,
10669 MTCTR_0,
10670 ADD_0_11_11,
10671 ADD_11_0_11,
10672 BCTR,
10673 NOP,
10674 NOP
10675 };
10676
10677 /*
10678 * Non-PIC glink code is a little simpler.
10679 *
10680 * # ith PLT code stub.
10681 * lis 11,(plt+(i-1)*4)@ha
10682 * lwz 11,(plt+(i-1)*4)@l(11)
10683 * mtctr 11
10684 * bctr
10685 *
10686 * The branch table is the same, then comes
10687 *
10688 * PLTresolve:
10689 * lis 12,(got+4)@ha
10690 * addis 11,11,(-res_0)@ha
10691 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10692 * addi 11,11,(-res_0)@l # r11 = index * 4
10693 * mtctr 0
10694 * add 0,11,11
10695 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10696 * add 11,0,11 # r11 = index * 12 = reloc offset.
10697 * bctr
10698 */
10699 static const unsigned int plt_resolve[] =
10700 {
10701 LIS_12,
10702 ADDIS_11_11,
10703 LWZ_0_12,
10704 ADDI_11_11,
10705 MTCTR_0,
10706 ADD_0_11_11,
10707 LWZ_12_12,
10708 ADD_11_0_11,
10709 BCTR,
10710 NOP,
10711 NOP,
10712 NOP,
10713 NOP,
10714 NOP,
10715 NOP,
10716 NOP
10717 };
10718
10719 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10720 abort ();
10721 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10722 abort ();
10723
10724 /* Build the branch table, one for each plt entry (less one),
10725 and perhaps some padding. */
10726 p = htab->glink->contents;
10727 p += htab->glink_pltresolve;
10728 endp = htab->glink->contents;
10729 endp += htab->glink->size - GLINK_PLTRESOLVE;
10730 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10731 {
10732 bfd_put_32 (output_bfd, B + endp - p, p);
10733 p += 4;
10734 }
10735 while (p < endp)
10736 {
10737 bfd_put_32 (output_bfd, NOP, p);
10738 p += 4;
10739 }
10740
10741 res0 = (htab->glink_pltresolve
10742 + htab->glink->output_section->vma
10743 + htab->glink->output_offset);
10744
10745 if (htab->params->ppc476_workaround)
10746 {
10747 /* Ensure that a call stub at the end of a page doesn't
10748 result in prefetch over the end of the page into the
10749 glink branch table. */
10750 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10751 bfd_vma page_addr;
10752 bfd_vma glink_start = (htab->glink->output_section->vma
10753 + htab->glink->output_offset);
10754
10755 for (page_addr = res0 & -pagesize;
10756 page_addr > glink_start;
10757 page_addr -= pagesize)
10758 {
10759 /* We have a plt call stub that may need fixing. */
10760 bfd_byte *loc;
10761 unsigned int insn;
10762
10763 loc = htab->glink->contents + page_addr - 4 - glink_start;
10764 insn = bfd_get_32 (output_bfd, loc);
10765 if (insn == BCTR)
10766 {
10767 /* By alignment, we know that there must be at least
10768 one other call stub before this one. */
10769 insn = bfd_get_32 (output_bfd, loc - 16);
10770 if (insn == BCTR)
10771 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10772 else
10773 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10774 }
10775 }
10776 }
10777
10778 /* Last comes the PLTresolve stub. */
10779 if (bfd_link_pic (info))
10780 {
10781 bfd_vma bcl;
10782
10783 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10784 {
10785 unsigned int insn = pic_plt_resolve[i];
10786
10787 if (htab->params->ppc476_workaround && insn == NOP)
10788 insn = BA + 0;
10789 bfd_put_32 (output_bfd, insn, p);
10790 p += 4;
10791 }
10792 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10793
10794 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10795 + htab->glink->output_section->vma
10796 + htab->glink->output_offset);
10797
10798 bfd_put_32 (output_bfd,
10799 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10800 bfd_put_32 (output_bfd,
10801 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10802 bfd_put_32 (output_bfd,
10803 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10804 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10805 {
10806 bfd_put_32 (output_bfd,
10807 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10808 bfd_put_32 (output_bfd,
10809 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10810 }
10811 else
10812 {
10813 bfd_put_32 (output_bfd,
10814 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10815 bfd_put_32 (output_bfd,
10816 LWZ_12_12 + 4, p + 9*4);
10817 }
10818 }
10819 else
10820 {
10821 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10822 {
10823 unsigned int insn = plt_resolve[i];
10824
10825 if (htab->params->ppc476_workaround && insn == NOP)
10826 insn = BA + 0;
10827 bfd_put_32 (output_bfd, insn, p);
10828 p += 4;
10829 }
10830 p -= 4 * ARRAY_SIZE (plt_resolve);
10831
10832 bfd_put_32 (output_bfd,
10833 LIS_12 + PPC_HA (got + 4), p + 0*4);
10834 bfd_put_32 (output_bfd,
10835 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10836 bfd_put_32 (output_bfd,
10837 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10838 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10839 {
10840 bfd_put_32 (output_bfd,
10841 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10842 bfd_put_32 (output_bfd,
10843 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10844 }
10845 else
10846 {
10847 bfd_put_32 (output_bfd,
10848 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10849 bfd_put_32 (output_bfd,
10850 LWZ_12_12 + 4, p + 6*4);
10851 }
10852 }
10853 }
10854
10855 if (htab->glink_eh_frame != NULL
10856 && htab->glink_eh_frame->contents != NULL)
10857 {
10858 unsigned char *p = htab->glink_eh_frame->contents;
10859 bfd_vma val;
10860
10861 p += sizeof (glink_eh_frame_cie);
10862 /* FDE length. */
10863 p += 4;
10864 /* CIE pointer. */
10865 p += 4;
10866 /* Offset to .glink. */
10867 val = (htab->glink->output_section->vma
10868 + htab->glink->output_offset);
10869 val -= (htab->glink_eh_frame->output_section->vma
10870 + htab->glink_eh_frame->output_offset);
10871 val -= p - htab->glink_eh_frame->contents;
10872 bfd_put_32 (htab->elf.dynobj, val, p);
10873
10874 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10875 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10876 htab->glink_eh_frame,
10877 htab->glink_eh_frame->contents))
10878 return FALSE;
10879 }
10880
10881 return ret;
10882 }
10883 \f
10884 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10885 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10886 #define TARGET_BIG_SYM powerpc_elf32_vec
10887 #define TARGET_BIG_NAME "elf32-powerpc"
10888 #define ELF_ARCH bfd_arch_powerpc
10889 #define ELF_TARGET_ID PPC32_ELF_DATA
10890 #define ELF_MACHINE_CODE EM_PPC
10891 #ifdef __QNXTARGET__
10892 #define ELF_MAXPAGESIZE 0x1000
10893 #define ELF_COMMONPAGESIZE 0x1000
10894 #else
10895 #define ELF_MAXPAGESIZE 0x10000
10896 #define ELF_COMMONPAGESIZE 0x10000
10897 #endif
10898 #define ELF_MINPAGESIZE 0x1000
10899 #define elf_info_to_howto ppc_elf_info_to_howto
10900
10901 #ifdef EM_CYGNUS_POWERPC
10902 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10903 #endif
10904
10905 #ifdef EM_PPC_OLD
10906 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10907 #endif
10908
10909 #define elf_backend_plt_not_loaded 1
10910 #define elf_backend_want_dynrelro 1
10911 #define elf_backend_can_gc_sections 1
10912 #define elf_backend_can_refcount 1
10913 #define elf_backend_rela_normal 1
10914 #define elf_backend_caches_rawsize 1
10915
10916 #define bfd_elf32_mkobject ppc_elf_mkobject
10917 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10918 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10919 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10920 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10921 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10922 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10923 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10924
10925 #define elf_backend_object_p ppc_elf_object_p
10926 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10927 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10928 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10929 #define elf_backend_relocate_section ppc_elf_relocate_section
10930 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10931 #define elf_backend_check_relocs ppc_elf_check_relocs
10932 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10933 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10934 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10935 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10936 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10937 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10938 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10939 #define elf_backend_fake_sections ppc_elf_fake_sections
10940 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10941 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10942 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10943 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10944 #define elf_backend_write_core_note ppc_elf_write_core_note
10945 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10946 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10947 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10948 #define elf_backend_write_section ppc_elf_write_section
10949 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10950 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10951 #define elf_backend_action_discarded ppc_elf_action_discarded
10952 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10953 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10954
10955 #include "elf32-target.h"
10956
10957 /* FreeBSD Target */
10958
10959 #undef TARGET_LITTLE_SYM
10960 #undef TARGET_LITTLE_NAME
10961
10962 #undef TARGET_BIG_SYM
10963 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10964 #undef TARGET_BIG_NAME
10965 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10966
10967 #undef ELF_OSABI
10968 #define ELF_OSABI ELFOSABI_FREEBSD
10969
10970 #undef elf32_bed
10971 #define elf32_bed elf32_powerpc_fbsd_bed
10972
10973 #include "elf32-target.h"
10974
10975 /* VxWorks Target */
10976
10977 #undef TARGET_LITTLE_SYM
10978 #undef TARGET_LITTLE_NAME
10979
10980 #undef TARGET_BIG_SYM
10981 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10982 #undef TARGET_BIG_NAME
10983 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10984
10985 #undef ELF_OSABI
10986
10987 /* VxWorks uses the elf default section flags for .plt. */
10988 static const struct bfd_elf_special_section *
10989 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10990 {
10991 if (sec->name == NULL)
10992 return NULL;
10993
10994 if (strcmp (sec->name, ".plt") == 0)
10995 return _bfd_elf_get_sec_type_attr (abfd, sec);
10996
10997 return ppc_elf_get_sec_type_attr (abfd, sec);
10998 }
10999
11000 /* Like ppc_elf_link_hash_table_create, but overrides
11001 appropriately for VxWorks. */
11002 static struct bfd_link_hash_table *
11003 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11004 {
11005 struct bfd_link_hash_table *ret;
11006
11007 ret = ppc_elf_link_hash_table_create (abfd);
11008 if (ret)
11009 {
11010 struct ppc_elf_link_hash_table *htab
11011 = (struct ppc_elf_link_hash_table *)ret;
11012 htab->is_vxworks = 1;
11013 htab->plt_type = PLT_VXWORKS;
11014 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11015 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11016 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11017 }
11018 return ret;
11019 }
11020
11021 /* Tweak magic VxWorks symbols as they are loaded. */
11022 static bfd_boolean
11023 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11024 struct bfd_link_info *info,
11025 Elf_Internal_Sym *sym,
11026 const char **namep ATTRIBUTE_UNUSED,
11027 flagword *flagsp ATTRIBUTE_UNUSED,
11028 asection **secp,
11029 bfd_vma *valp)
11030 {
11031 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
11032 valp))
11033 return FALSE;
11034
11035 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11036 }
11037
11038 static void
11039 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11040 {
11041 ppc_elf_final_write_processing(abfd, linker);
11042 elf_vxworks_final_write_processing(abfd, linker);
11043 }
11044
11045 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11046 define it. */
11047 #undef elf_backend_want_plt_sym
11048 #define elf_backend_want_plt_sym 1
11049 #undef elf_backend_want_got_plt
11050 #define elf_backend_want_got_plt 1
11051 #undef elf_backend_got_symbol_offset
11052 #define elf_backend_got_symbol_offset 0
11053 #undef elf_backend_plt_not_loaded
11054 #define elf_backend_plt_not_loaded 0
11055 #undef elf_backend_plt_readonly
11056 #define elf_backend_plt_readonly 1
11057 #undef elf_backend_got_header_size
11058 #define elf_backend_got_header_size 12
11059 #undef elf_backend_dtrel_excludes_plt
11060 #define elf_backend_dtrel_excludes_plt 1
11061
11062 #undef bfd_elf32_get_synthetic_symtab
11063
11064 #undef bfd_elf32_bfd_link_hash_table_create
11065 #define bfd_elf32_bfd_link_hash_table_create \
11066 ppc_elf_vxworks_link_hash_table_create
11067 #undef elf_backend_add_symbol_hook
11068 #define elf_backend_add_symbol_hook \
11069 ppc_elf_vxworks_add_symbol_hook
11070 #undef elf_backend_link_output_symbol_hook
11071 #define elf_backend_link_output_symbol_hook \
11072 elf_vxworks_link_output_symbol_hook
11073 #undef elf_backend_final_write_processing
11074 #define elf_backend_final_write_processing \
11075 ppc_elf_vxworks_final_write_processing
11076 #undef elf_backend_get_sec_type_attr
11077 #define elf_backend_get_sec_type_attr \
11078 ppc_elf_vxworks_get_sec_type_attr
11079 #undef elf_backend_emit_relocs
11080 #define elf_backend_emit_relocs \
11081 elf_vxworks_emit_relocs
11082
11083 #undef elf32_bed
11084 #define elf32_bed ppc_elf_vxworks_bed
11085 #undef elf_backend_post_process_headers
11086
11087 #include "elf32-target.h"
GDB Binutils - Deliverables
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