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Delete duplicate target short-cuts to dynamic sections
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable hierarchy. */
1750 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTINHERIT", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable member usage. */
1765 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTENTRY", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Phony reloc to handle AIX style TOC entries. */
1780 HOWTO (R_PPC_TOC16, /* type */
1781 0, /* rightshift */
1782 1, /* size (0 = byte, 1 = short, 2 = long) */
1783 16, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_signed, /* complain_on_overflow */
1787 ppc_elf_unhandled_reloc, /* special_function */
1788 "R_PPC_TOC16", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0xffff, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793 };
1794
1795 /* External 32-bit PPC structure for PRPSINFO. This structure is
1796 ABI-defined, thus we choose to use char arrays here in order to
1797 avoid dealing with different types in different architectures.
1798
1799 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1800 most non-PPC architectures use `short int'.
1801
1802 This structure will ultimately be written in the corefile's note
1803 section, as the PRPSINFO. */
1804
1805 struct elf_external_ppc_linux_prpsinfo32
1806 {
1807 char pr_state; /* Numeric process state. */
1808 char pr_sname; /* Char for pr_state. */
1809 char pr_zomb; /* Zombie. */
1810 char pr_nice; /* Nice val. */
1811 char pr_flag[4]; /* Flags. */
1812 char pr_uid[4];
1813 char pr_gid[4];
1814 char pr_pid[4];
1815 char pr_ppid[4];
1816 char pr_pgrp[4];
1817 char pr_sid[4];
1818 char pr_fname[16]; /* Filename of executable. */
1819 char pr_psargs[80]; /* Initial part of arg list. */
1820 };
1821
1822 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1823 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1824
1825 static inline void
1826 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1827 const struct elf_internal_linux_prpsinfo *from,
1828 struct elf_external_ppc_linux_prpsinfo32 *to)
1829 {
1830 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1831 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1832 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1833 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1834 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1835 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1836 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1837 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1838 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1839 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1840 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1841 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1842 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1843 }
1844 \f
1845 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1846
1847 static void
1848 ppc_elf_howto_init (void)
1849 {
1850 unsigned int i, type;
1851
1852 for (i = 0;
1853 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1854 i++)
1855 {
1856 type = ppc_elf_howto_raw[i].type;
1857 if (type >= (sizeof (ppc_elf_howto_table)
1858 / sizeof (ppc_elf_howto_table[0])))
1859 abort ();
1860 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1861 }
1862 }
1863
1864 static reloc_howto_type *
1865 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1866 bfd_reloc_code_real_type code)
1867 {
1868 enum elf_ppc_reloc_type r;
1869
1870 /* Initialize howto table if not already done. */
1871 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1872 ppc_elf_howto_init ();
1873
1874 switch (code)
1875 {
1876 default:
1877 return NULL;
1878
1879 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1880 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1881 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1882 case BFD_RELOC_PPC64_ADDR16_DS:
1883 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1884 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1885 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1886 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1887 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1888 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1889 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1890 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1891 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1892 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1893 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1894 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1895 case BFD_RELOC_PPC64_GOT16_DS:
1896 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1897 case BFD_RELOC_PPC64_GOT16_LO_DS:
1898 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1899 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1900 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1901 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1902 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1903 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1904 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1905 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1906 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1907 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1908 case BFD_RELOC_PPC64_PLT16_LO_DS:
1909 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1910 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1911 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1912 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1913 case BFD_RELOC_PPC64_SECTOFF_DS:
1914 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1915 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1916 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1917 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1918 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1919 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1920 case BFD_RELOC_PPC64_TOC16_DS:
1921 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1922 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1923 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1924 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1925 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1926 case BFD_RELOC_PPC64_TPREL16_DS:
1927 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1928 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1929 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1933 case BFD_RELOC_PPC64_DTPREL16_DS:
1934 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1935 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1936 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1937 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1938 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1939 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1943 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1947 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1951 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1955 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1956 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1960 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1961 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1963 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1964 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1965 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1966 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1967 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1969 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1970 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1971 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1972 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1973 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1974 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1975 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1976 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1977 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1978 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1979 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1980 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1981 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1982 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1983 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1984 r = R_PPC_VLE_SDAREL_LO16A;
1985 break;
1986 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1987 r = R_PPC_VLE_SDAREL_LO16D;
1988 break;
1989 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1990 r = R_PPC_VLE_SDAREL_HI16A;
1991 break;
1992 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1993 r = R_PPC_VLE_SDAREL_HI16D;
1994 break;
1995 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1996 r = R_PPC_VLE_SDAREL_HA16A;
1997 break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1999 r = R_PPC_VLE_SDAREL_HA16D;
2000 break;
2001 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2002 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2003 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2004 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2005 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2006 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2007 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2008 }
2009
2010 return ppc_elf_howto_table[r];
2011 };
2012
2013 static reloc_howto_type *
2014 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2015 const char *r_name)
2016 {
2017 unsigned int i;
2018
2019 for (i = 0;
2020 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2021 i++)
2022 if (ppc_elf_howto_raw[i].name != NULL
2023 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2024 return &ppc_elf_howto_raw[i];
2025
2026 return NULL;
2027 }
2028
2029 /* Set the howto pointer for a PowerPC ELF reloc. */
2030
2031 static void
2032 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2033 arelent *cache_ptr,
2034 Elf_Internal_Rela *dst)
2035 {
2036 unsigned int r_type;
2037
2038 /* Initialize howto table if not already done. */
2039 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2040 ppc_elf_howto_init ();
2041
2042 r_type = ELF32_R_TYPE (dst->r_info);
2043 if (r_type >= R_PPC_max)
2044 {
2045 /* xgettext:c-format */
2046 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2047 abfd, r_type);
2048 bfd_set_error (bfd_error_bad_value);
2049 r_type = R_PPC_NONE;
2050 }
2051 cache_ptr->howto = ppc_elf_howto_table[r_type];
2052
2053 /* Just because the above assert didn't trigger doesn't mean that
2054 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2055 if (!cache_ptr->howto)
2056 {
2057 /* xgettext:c-format */
2058 _bfd_error_handler (_("%B: invalid relocation type %d"),
2059 abfd, r_type);
2060 bfd_set_error (bfd_error_bad_value);
2061
2062 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2063 }
2064 }
2065
2066 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2067
2068 static bfd_reloc_status_type
2069 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2070 arelent *reloc_entry,
2071 asymbol *symbol,
2072 void *data ATTRIBUTE_UNUSED,
2073 asection *input_section,
2074 bfd *output_bfd,
2075 char **error_message ATTRIBUTE_UNUSED)
2076 {
2077 enum elf_ppc_reloc_type r_type;
2078 long insn;
2079 bfd_size_type octets;
2080 bfd_vma value;
2081
2082 if (output_bfd != NULL)
2083 {
2084 reloc_entry->address += input_section->output_offset;
2085 return bfd_reloc_ok;
2086 }
2087
2088 reloc_entry->addend += 0x8000;
2089 r_type = reloc_entry->howto->type;
2090 if (r_type != R_PPC_REL16DX_HA)
2091 return bfd_reloc_continue;
2092
2093 value = 0;
2094 if (!bfd_is_com_section (symbol->section))
2095 value = symbol->value;
2096 value += (reloc_entry->addend
2097 + symbol->section->output_offset
2098 + symbol->section->output_section->vma);
2099 value -= (reloc_entry->address
2100 + input_section->output_offset
2101 + input_section->output_section->vma);
2102 value >>= 16;
2103
2104 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2105 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2106 insn &= ~0x1fffc1;
2107 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2108 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2109 return bfd_reloc_ok;
2110 }
2111
2112 static bfd_reloc_status_type
2113 ppc_elf_unhandled_reloc (bfd *abfd,
2114 arelent *reloc_entry,
2115 asymbol *symbol,
2116 void *data,
2117 asection *input_section,
2118 bfd *output_bfd,
2119 char **error_message)
2120 {
2121 /* If this is a relocatable link (output_bfd test tells us), just
2122 call the generic function. Any adjustment will be done at final
2123 link time. */
2124 if (output_bfd != NULL)
2125 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2126 input_section, output_bfd, error_message);
2127
2128 if (error_message != NULL)
2129 {
2130 static char buf[60];
2131 sprintf (buf, _("generic linker can't handle %s"),
2132 reloc_entry->howto->name);
2133 *error_message = buf;
2134 }
2135 return bfd_reloc_dangerous;
2136 }
2137 \f
2138 /* Sections created by the linker. */
2139
2140 typedef struct elf_linker_section
2141 {
2142 /* Pointer to the bfd section. */
2143 asection *section;
2144 /* Section name. */
2145 const char *name;
2146 /* Associated bss section name. */
2147 const char *bss_name;
2148 /* Associated symbol name. */
2149 const char *sym_name;
2150 /* Associated symbol. */
2151 struct elf_link_hash_entry *sym;
2152 } elf_linker_section_t;
2153
2154 /* Linked list of allocated pointer entries. This hangs off of the
2155 symbol lists, and provides allows us to return different pointers,
2156 based on different addend's. */
2157
2158 typedef struct elf_linker_section_pointers
2159 {
2160 /* next allocated pointer for this symbol */
2161 struct elf_linker_section_pointers *next;
2162 /* offset of pointer from beginning of section */
2163 bfd_vma offset;
2164 /* addend used */
2165 bfd_vma addend;
2166 /* which linker section this is */
2167 elf_linker_section_t *lsect;
2168 } elf_linker_section_pointers_t;
2169
2170 struct ppc_elf_obj_tdata
2171 {
2172 struct elf_obj_tdata elf;
2173
2174 /* A mapping from local symbols to offsets into the various linker
2175 sections added. This is index by the symbol index. */
2176 elf_linker_section_pointers_t **linker_section_pointers;
2177
2178 /* Flags used to auto-detect plt type. */
2179 unsigned int makes_plt_call : 1;
2180 unsigned int has_rel16 : 1;
2181 };
2182
2183 #define ppc_elf_tdata(bfd) \
2184 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2185
2186 #define elf_local_ptr_offsets(bfd) \
2187 (ppc_elf_tdata (bfd)->linker_section_pointers)
2188
2189 #define is_ppc_elf(bfd) \
2190 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2191 && elf_object_id (bfd) == PPC32_ELF_DATA)
2192
2193 /* Override the generic function because we store some extras. */
2194
2195 static bfd_boolean
2196 ppc_elf_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2199 PPC32_ELF_DATA);
2200 }
2201
2202 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2203
2204 bfd_boolean
2205 _bfd_elf_ppc_set_arch (bfd *abfd)
2206 {
2207 unsigned long mach = 0;
2208 asection *s;
2209 unsigned char *contents;
2210
2211 if (abfd->arch_info->bits_per_word == 32
2212 && bfd_big_endian (abfd))
2213 {
2214
2215 for (s = abfd->sections; s != NULL; s = s->next)
2216 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2217 break;
2218 if (s != NULL)
2219 mach = bfd_mach_ppc_vle;
2220 }
2221
2222 if (mach == 0)
2223 {
2224 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2225 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2226 {
2227 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2228 unsigned int i;
2229
2230 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2231 {
2232 unsigned int val = bfd_get_32 (abfd, contents + i);
2233 switch (val >> 16)
2234 {
2235 case PPC_APUINFO_PMR:
2236 case PPC_APUINFO_RFMCI:
2237 if (mach == 0)
2238 mach = bfd_mach_ppc_titan;
2239 break;
2240
2241 case PPC_APUINFO_ISEL:
2242 case PPC_APUINFO_CACHELCK:
2243 if (mach == bfd_mach_ppc_titan)
2244 mach = bfd_mach_ppc_e500mc;
2245 break;
2246
2247 case PPC_APUINFO_SPE:
2248 case PPC_APUINFO_EFS:
2249 case PPC_APUINFO_BRLOCK:
2250 if (mach != bfd_mach_ppc_vle)
2251 mach = bfd_mach_ppc_e500;
2252 break;
2253
2254 case PPC_APUINFO_VLE:
2255 mach = bfd_mach_ppc_vle;
2256 break;
2257
2258 default:
2259 mach = -1ul;
2260 }
2261 }
2262 free (contents);
2263 }
2264 }
2265
2266 if (mach != 0 && mach != -1ul)
2267 {
2268 const bfd_arch_info_type *arch;
2269
2270 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2271 if (arch->mach == mach)
2272 {
2273 abfd->arch_info = arch;
2274 break;
2275 }
2276 }
2277 return TRUE;
2278 }
2279
2280 /* Fix bad default arch selected for a 32 bit input bfd when the
2281 default is 64 bit. Also select arch based on apuinfo. */
2282
2283 static bfd_boolean
2284 ppc_elf_object_p (bfd *abfd)
2285 {
2286 if (!abfd->arch_info->the_default)
2287 return TRUE;
2288
2289 if (abfd->arch_info->bits_per_word == 64)
2290 {
2291 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2292
2293 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2294 {
2295 /* Relies on arch after 64 bit default being 32 bit default. */
2296 abfd->arch_info = abfd->arch_info->next;
2297 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2298 }
2299 }
2300 return _bfd_elf_ppc_set_arch (abfd);
2301 }
2302
2303 /* Function to set whether a module needs the -mrelocatable bit set. */
2304
2305 static bfd_boolean
2306 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2307 {
2308 BFD_ASSERT (!elf_flags_init (abfd)
2309 || elf_elfheader (abfd)->e_flags == flags);
2310
2311 elf_elfheader (abfd)->e_flags = flags;
2312 elf_flags_init (abfd) = TRUE;
2313 return TRUE;
2314 }
2315
2316 /* Support for core dump NOTE sections. */
2317
2318 static bfd_boolean
2319 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2320 {
2321 int offset;
2322 unsigned int size;
2323
2324 switch (note->descsz)
2325 {
2326 default:
2327 return FALSE;
2328
2329 case 268: /* Linux/PPC. */
2330 /* pr_cursig */
2331 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2332
2333 /* pr_pid */
2334 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2335
2336 /* pr_reg */
2337 offset = 72;
2338 size = 192;
2339
2340 break;
2341 }
2342
2343 /* Make a ".reg/999" section. */
2344 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2345 size, note->descpos + offset);
2346 }
2347
2348 static bfd_boolean
2349 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2350 {
2351 switch (note->descsz)
2352 {
2353 default:
2354 return FALSE;
2355
2356 case 128: /* Linux/PPC elf_prpsinfo. */
2357 elf_tdata (abfd)->core->pid
2358 = bfd_get_32 (abfd, note->descdata + 16);
2359 elf_tdata (abfd)->core->program
2360 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2361 elf_tdata (abfd)->core->command
2362 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2363 }
2364
2365 /* Note that for some reason, a spurious space is tacked
2366 onto the end of the args in some (at least one anyway)
2367 implementations, so strip it off if it exists. */
2368
2369 {
2370 char *command = elf_tdata (abfd)->core->command;
2371 int n = strlen (command);
2372
2373 if (0 < n && command[n - 1] == ' ')
2374 command[n - 1] = '\0';
2375 }
2376
2377 return TRUE;
2378 }
2379
2380 char *
2381 elfcore_write_ppc_linux_prpsinfo32
2382 (bfd *abfd,
2383 char *buf,
2384 int *bufsiz,
2385 const struct elf_internal_linux_prpsinfo *prpsinfo)
2386 {
2387 struct elf_external_ppc_linux_prpsinfo32 data;
2388
2389 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2390 return elfcore_write_note (abfd, buf, bufsiz,
2391 "CORE", NT_PRPSINFO, &data, sizeof (data));
2392 }
2393
2394 static char *
2395 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2396 {
2397 switch (note_type)
2398 {
2399 default:
2400 return NULL;
2401
2402 case NT_PRPSINFO:
2403 {
2404 char data[128];
2405 va_list ap;
2406
2407 va_start (ap, note_type);
2408 memset (data, 0, sizeof (data));
2409 strncpy (data + 32, va_arg (ap, const char *), 16);
2410 strncpy (data + 48, va_arg (ap, const char *), 80);
2411 va_end (ap);
2412 return elfcore_write_note (abfd, buf, bufsiz,
2413 "CORE", note_type, data, sizeof (data));
2414 }
2415
2416 case NT_PRSTATUS:
2417 {
2418 char data[268];
2419 va_list ap;
2420 long pid;
2421 int cursig;
2422 const void *greg;
2423
2424 va_start (ap, note_type);
2425 memset (data, 0, 72);
2426 pid = va_arg (ap, long);
2427 bfd_put_32 (abfd, pid, data + 24);
2428 cursig = va_arg (ap, int);
2429 bfd_put_16 (abfd, cursig, data + 12);
2430 greg = va_arg (ap, const void *);
2431 memcpy (data + 72, greg, 192);
2432 memset (data + 264, 0, 4);
2433 va_end (ap);
2434 return elfcore_write_note (abfd, buf, bufsiz,
2435 "CORE", note_type, data, sizeof (data));
2436 }
2437 }
2438 }
2439
2440 static flagword
2441 ppc_elf_lookup_section_flags (char *flag_name)
2442 {
2443
2444 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2445 return SHF_PPC_VLE;
2446
2447 return 0;
2448 }
2449
2450 /* Return address for Ith PLT stub in section PLT, for relocation REL
2451 or (bfd_vma) -1 if it should not be included. */
2452
2453 static bfd_vma
2454 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2455 const asection *plt ATTRIBUTE_UNUSED,
2456 const arelent *rel)
2457 {
2458 return rel->address;
2459 }
2460
2461 /* Handle a PowerPC specific section when reading an object file. This
2462 is called when bfd_section_from_shdr finds a section with an unknown
2463 type. */
2464
2465 static bfd_boolean
2466 ppc_elf_section_from_shdr (bfd *abfd,
2467 Elf_Internal_Shdr *hdr,
2468 const char *name,
2469 int shindex)
2470 {
2471 asection *newsect;
2472 flagword flags;
2473
2474 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2475 return FALSE;
2476
2477 newsect = hdr->bfd_section;
2478 flags = bfd_get_section_flags (abfd, newsect);
2479 if (hdr->sh_flags & SHF_EXCLUDE)
2480 flags |= SEC_EXCLUDE;
2481
2482 if (hdr->sh_type == SHT_ORDERED)
2483 flags |= SEC_SORT_ENTRIES;
2484
2485 bfd_set_section_flags (abfd, newsect, flags);
2486 return TRUE;
2487 }
2488
2489 /* Set up any other section flags and such that may be necessary. */
2490
2491 static bfd_boolean
2492 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2493 Elf_Internal_Shdr *shdr,
2494 asection *asect)
2495 {
2496 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2497 shdr->sh_type = SHT_ORDERED;
2498
2499 return TRUE;
2500 }
2501
2502 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2503 need to bump up the number of section headers. */
2504
2505 static int
2506 ppc_elf_additional_program_headers (bfd *abfd,
2507 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2508 {
2509 asection *s;
2510 int ret = 0;
2511
2512 s = bfd_get_section_by_name (abfd, ".sbss2");
2513 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2514 ++ret;
2515
2516 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2517 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2518 ++ret;
2519
2520 return ret;
2521 }
2522
2523 /* Modify the segment map for VLE executables. */
2524
2525 bfd_boolean
2526 ppc_elf_modify_segment_map (bfd *abfd,
2527 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2528 {
2529 struct elf_segment_map *m;
2530
2531 /* At this point in the link, output sections have already been sorted by
2532 LMA and assigned to segments. All that is left to do is to ensure
2533 there is no mixing of VLE & non-VLE sections in a text segment.
2534 If we find that case, we split the segment.
2535 We maintain the original output section order. */
2536
2537 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2538 {
2539 struct elf_segment_map *n;
2540 bfd_size_type amt;
2541 unsigned int j, k;
2542 unsigned int p_flags;
2543
2544 if (m->p_type != PT_LOAD || m->count == 0)
2545 continue;
2546
2547 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2548 {
2549 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2550 p_flags |= PF_W;
2551 if ((m->sections[j]->flags & SEC_CODE) != 0)
2552 {
2553 p_flags |= PF_X;
2554 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2555 p_flags |= PF_PPC_VLE;
2556 break;
2557 }
2558 }
2559 if (j != m->count)
2560 while (++j != m->count)
2561 {
2562 unsigned int p_flags1 = PF_R;
2563
2564 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2565 p_flags1 |= PF_W;
2566 if ((m->sections[j]->flags & SEC_CODE) != 0)
2567 {
2568 p_flags1 |= PF_X;
2569 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2570 p_flags1 |= PF_PPC_VLE;
2571 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2572 break;
2573 }
2574 p_flags |= p_flags1;
2575 }
2576 /* If we're splitting a segment which originally contained rw
2577 sections then those sections might now only be in one of the
2578 two parts. So always set p_flags if splitting, even if we
2579 are being called for objcopy with p_flags_valid set. */
2580 if (j != m->count || !m->p_flags_valid)
2581 {
2582 m->p_flags_valid = 1;
2583 m->p_flags = p_flags;
2584 }
2585 if (j == m->count)
2586 continue;
2587
2588 /* Sections 0..j-1 stay in this (current) segment,
2589 the remainder are put in a new segment.
2590 The scan resumes with the new segment. */
2591
2592 amt = sizeof (struct elf_segment_map);
2593 amt += (m->count - j - 1) * sizeof (asection *);
2594 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2595 if (n == NULL)
2596 return FALSE;
2597
2598 n->p_type = PT_LOAD;
2599 n->count = m->count - j;
2600 for (k = 0; k < n->count; ++k)
2601 n->sections[k] = m->sections[j + k];
2602 m->count = j;
2603 m->p_size_valid = 0;
2604 n->next = m->next;
2605 m->next = n;
2606 }
2607
2608 return TRUE;
2609 }
2610
2611 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2612 .PPC.EMB.sbss0 a normal section, and not a bss section so
2613 that the linker doesn't crater when trying to make more than
2614 2 sections. */
2615
2616 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2617 {
2618 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2619 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2620 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2621 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2623 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2624 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2625 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2628 };
2629
2630 /* This is what we want for new plt/got. */
2631 static struct bfd_elf_special_section ppc_alt_plt =
2632 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2633
2634 static const struct bfd_elf_special_section *
2635 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2636 {
2637 const struct bfd_elf_special_section *ssect;
2638
2639 /* See if this is one of the special sections. */
2640 if (sec->name == NULL)
2641 return NULL;
2642
2643 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2644 sec->use_rela_p);
2645 if (ssect != NULL)
2646 {
2647 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2648 ssect = &ppc_alt_plt;
2649 return ssect;
2650 }
2651
2652 return _bfd_elf_get_sec_type_attr (abfd, sec);
2653 }
2654 \f
2655 /* Very simple linked list structure for recording apuinfo values. */
2656 typedef struct apuinfo_list
2657 {
2658 struct apuinfo_list *next;
2659 unsigned long value;
2660 }
2661 apuinfo_list;
2662
2663 static apuinfo_list *head;
2664 static bfd_boolean apuinfo_set;
2665
2666 static void
2667 apuinfo_list_init (void)
2668 {
2669 head = NULL;
2670 apuinfo_set = FALSE;
2671 }
2672
2673 static void
2674 apuinfo_list_add (unsigned long value)
2675 {
2676 apuinfo_list *entry = head;
2677
2678 while (entry != NULL)
2679 {
2680 if (entry->value == value)
2681 return;
2682 entry = entry->next;
2683 }
2684
2685 entry = bfd_malloc (sizeof (* entry));
2686 if (entry == NULL)
2687 return;
2688
2689 entry->value = value;
2690 entry->next = head;
2691 head = entry;
2692 }
2693
2694 static unsigned
2695 apuinfo_list_length (void)
2696 {
2697 apuinfo_list *entry;
2698 unsigned long count;
2699
2700 for (entry = head, count = 0;
2701 entry;
2702 entry = entry->next)
2703 ++ count;
2704
2705 return count;
2706 }
2707
2708 static inline unsigned long
2709 apuinfo_list_element (unsigned long number)
2710 {
2711 apuinfo_list * entry;
2712
2713 for (entry = head;
2714 entry && number --;
2715 entry = entry->next)
2716 ;
2717
2718 return entry ? entry->value : 0;
2719 }
2720
2721 static void
2722 apuinfo_list_finish (void)
2723 {
2724 apuinfo_list *entry;
2725
2726 for (entry = head; entry;)
2727 {
2728 apuinfo_list *next = entry->next;
2729 free (entry);
2730 entry = next;
2731 }
2732
2733 head = NULL;
2734 }
2735
2736 /* Scan the input BFDs and create a linked list of
2737 the APUinfo values that will need to be emitted. */
2738
2739 static void
2740 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2741 {
2742 bfd *ibfd;
2743 asection *asec;
2744 char *buffer = NULL;
2745 bfd_size_type largest_input_size = 0;
2746 unsigned i;
2747 unsigned long length;
2748 const char *error_message = NULL;
2749
2750 if (link_info == NULL)
2751 return;
2752
2753 apuinfo_list_init ();
2754
2755 /* Read in the input sections contents. */
2756 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2757 {
2758 unsigned long datum;
2759
2760 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2761 if (asec == NULL)
2762 continue;
2763
2764 /* xgettext:c-format */
2765 error_message = _("corrupt %s section in %B");
2766 length = asec->size;
2767 if (length < 20)
2768 goto fail;
2769
2770 apuinfo_set = TRUE;
2771 if (largest_input_size < asec->size)
2772 {
2773 if (buffer)
2774 free (buffer);
2775 largest_input_size = asec->size;
2776 buffer = bfd_malloc (largest_input_size);
2777 if (!buffer)
2778 return;
2779 }
2780
2781 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2782 || (bfd_bread (buffer, length, ibfd) != length))
2783 {
2784 /* xgettext:c-format */
2785 error_message = _("unable to read in %s section from %B");
2786 goto fail;
2787 }
2788
2789 /* Verify the contents of the header. Note - we have to
2790 extract the values this way in order to allow for a
2791 host whose endian-ness is different from the target. */
2792 datum = bfd_get_32 (ibfd, buffer);
2793 if (datum != sizeof APUINFO_LABEL)
2794 goto fail;
2795
2796 datum = bfd_get_32 (ibfd, buffer + 8);
2797 if (datum != 0x2)
2798 goto fail;
2799
2800 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2801 goto fail;
2802
2803 /* Get the number of bytes used for apuinfo entries. */
2804 datum = bfd_get_32 (ibfd, buffer + 4);
2805 if (datum + 20 != length)
2806 goto fail;
2807
2808 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2809 for (i = 0; i < datum; i += 4)
2810 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2811 }
2812
2813 error_message = NULL;
2814
2815 if (apuinfo_set)
2816 {
2817 /* Compute the size of the output section. */
2818 unsigned num_entries = apuinfo_list_length ();
2819
2820 /* Set the output section size, if it exists. */
2821 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2822
2823 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2824 {
2825 ibfd = abfd;
2826 /* xgettext:c-format */
2827 error_message = _("warning: unable to set size of %s section in %B");
2828 }
2829 }
2830
2831 fail:
2832 if (buffer)
2833 free (buffer);
2834
2835 if (error_message)
2836 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2837 }
2838
2839 /* Prevent the output section from accumulating the input sections'
2840 contents. We have already stored this in our linked list structure. */
2841
2842 static bfd_boolean
2843 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2844 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2845 asection *asec,
2846 bfd_byte *contents ATTRIBUTE_UNUSED)
2847 {
2848 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2849 }
2850
2851 /* Finally we can generate the output section. */
2852
2853 static void
2854 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2855 {
2856 bfd_byte *buffer;
2857 asection *asec;
2858 unsigned i;
2859 unsigned num_entries;
2860 bfd_size_type length;
2861
2862 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2863 if (asec == NULL)
2864 return;
2865
2866 if (!apuinfo_set)
2867 return;
2868
2869 length = asec->size;
2870 if (length < 20)
2871 return;
2872
2873 buffer = bfd_malloc (length);
2874 if (buffer == NULL)
2875 {
2876 _bfd_error_handler
2877 (_("failed to allocate space for new APUinfo section."));
2878 return;
2879 }
2880
2881 /* Create the apuinfo header. */
2882 num_entries = apuinfo_list_length ();
2883 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2884 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2885 bfd_put_32 (abfd, 0x2, buffer + 8);
2886 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2887
2888 length = 20;
2889 for (i = 0; i < num_entries; i++)
2890 {
2891 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2892 length += 4;
2893 }
2894
2895 if (length != asec->size)
2896 _bfd_error_handler (_("failed to compute new APUinfo section."));
2897
2898 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2899 _bfd_error_handler (_("failed to install new APUinfo section."));
2900
2901 free (buffer);
2902
2903 apuinfo_list_finish ();
2904 }
2905 \f
2906 static bfd_boolean
2907 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2908 {
2909 bfd_byte buf[GLINK_ENTRY_SIZE];
2910
2911 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2912 return FALSE;
2913
2914 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2915 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2916 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2917 && bfd_get_32 (abfd, buf + 12) == BCTR);
2918 }
2919
2920 static bfd_boolean
2921 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2922 {
2923 bfd_vma vma = *(bfd_vma *) ptr;
2924 return ((section->flags & SEC_ALLOC) != 0
2925 && section->vma <= vma
2926 && vma < section->vma + section->size);
2927 }
2928
2929 static long
2930 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2931 long dynsymcount, asymbol **dynsyms,
2932 asymbol **ret)
2933 {
2934 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2935 asection *plt, *relplt, *dynamic, *glink;
2936 bfd_vma glink_vma = 0;
2937 bfd_vma resolv_vma = 0;
2938 bfd_vma stub_vma;
2939 asymbol *s;
2940 arelent *p;
2941 long count, i;
2942 size_t size;
2943 char *names;
2944 bfd_byte buf[4];
2945
2946 *ret = NULL;
2947
2948 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2949 return 0;
2950
2951 if (dynsymcount <= 0)
2952 return 0;
2953
2954 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2955 if (relplt == NULL)
2956 return 0;
2957
2958 plt = bfd_get_section_by_name (abfd, ".plt");
2959 if (plt == NULL)
2960 return 0;
2961
2962 /* Call common code to handle old-style executable PLTs. */
2963 if (elf_section_flags (plt) & SHF_EXECINSTR)
2964 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2965 dynsymcount, dynsyms, ret);
2966
2967 /* If this object was prelinked, the prelinker stored the address
2968 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2969 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2970 if (dynamic != NULL)
2971 {
2972 bfd_byte *dynbuf, *extdyn, *extdynend;
2973 size_t extdynsize;
2974 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2975
2976 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2977 return -1;
2978
2979 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2980 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2981
2982 extdyn = dynbuf;
2983 extdynend = extdyn + dynamic->size;
2984 for (; extdyn < extdynend; extdyn += extdynsize)
2985 {
2986 Elf_Internal_Dyn dyn;
2987 (*swap_dyn_in) (abfd, extdyn, &dyn);
2988
2989 if (dyn.d_tag == DT_NULL)
2990 break;
2991
2992 if (dyn.d_tag == DT_PPC_GOT)
2993 {
2994 unsigned int g_o_t = dyn.d_un.d_val;
2995 asection *got = bfd_get_section_by_name (abfd, ".got");
2996 if (got != NULL
2997 && bfd_get_section_contents (abfd, got, buf,
2998 g_o_t - got->vma + 4, 4))
2999 glink_vma = bfd_get_32 (abfd, buf);
3000 break;
3001 }
3002 }
3003 free (dynbuf);
3004 }
3005
3006 /* Otherwise we read the first plt entry. */
3007 if (glink_vma == 0)
3008 {
3009 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3010 glink_vma = bfd_get_32 (abfd, buf);
3011 }
3012
3013 if (glink_vma == 0)
3014 return 0;
3015
3016 /* The .glink section usually does not survive the final
3017 link; search for the section (usually .text) where the
3018 glink stubs now reside. */
3019 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3020 if (glink == NULL)
3021 return 0;
3022
3023 /* Determine glink PLT resolver by reading the relative branch
3024 from the first glink stub. */
3025 if (bfd_get_section_contents (abfd, glink, buf,
3026 glink_vma - glink->vma, 4))
3027 {
3028 unsigned int insn = bfd_get_32 (abfd, buf);
3029
3030 /* The first glink stub may either branch to the resolver ... */
3031 insn ^= B;
3032 if ((insn & ~0x3fffffc) == 0)
3033 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3034
3035 /* ... or fall through a bunch of NOPs. */
3036 else if ((insn ^ B ^ NOP) == 0)
3037 for (i = 4;
3038 bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma + i, 4);
3040 i += 4)
3041 if (bfd_get_32 (abfd, buf) != NOP)
3042 {
3043 resolv_vma = glink_vma + i;
3044 break;
3045 }
3046 }
3047
3048 count = relplt->size / sizeof (Elf32_External_Rela);
3049 /* If the stubs are those for -shared/-pie then we might have
3050 multiple stubs for each plt entry. If that is the case then
3051 there is no way to associate stubs with their plt entries short
3052 of figuring out the GOT pointer value used in the stub. */
3053 if (!is_nonpic_glink_stub (abfd, glink,
3054 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3055 return 0;
3056
3057 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3058 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3059 return -1;
3060
3061 size = count * sizeof (asymbol);
3062 p = relplt->relocation;
3063 for (i = 0; i < count; i++, p++)
3064 {
3065 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3066 if (p->addend != 0)
3067 size += sizeof ("+0x") - 1 + 8;
3068 }
3069
3070 size += sizeof (asymbol) + sizeof ("__glink");
3071
3072 if (resolv_vma)
3073 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3074
3075 s = *ret = bfd_malloc (size);
3076 if (s == NULL)
3077 return -1;
3078
3079 stub_vma = glink_vma;
3080 names = (char *) (s + count + 1 + (resolv_vma != 0));
3081 p = relplt->relocation + count - 1;
3082 for (i = 0; i < count; i++)
3083 {
3084 size_t len;
3085
3086 *s = **p->sym_ptr_ptr;
3087 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3088 we are defining a symbol, ensure one of them is set. */
3089 if ((s->flags & BSF_LOCAL) == 0)
3090 s->flags |= BSF_GLOBAL;
3091 s->flags |= BSF_SYNTHETIC;
3092 s->section = glink;
3093 stub_vma -= 16;
3094 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3095 stub_vma -= 32;
3096 s->value = stub_vma - glink->vma;
3097 s->name = names;
3098 s->udata.p = NULL;
3099 len = strlen ((*p->sym_ptr_ptr)->name);
3100 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3101 names += len;
3102 if (p->addend != 0)
3103 {
3104 memcpy (names, "+0x", sizeof ("+0x") - 1);
3105 names += sizeof ("+0x") - 1;
3106 bfd_sprintf_vma (abfd, names, p->addend);
3107 names += strlen (names);
3108 }
3109 memcpy (names, "@plt", sizeof ("@plt"));
3110 names += sizeof ("@plt");
3111 ++s;
3112 --p;
3113 }
3114
3115 /* Add a symbol at the start of the glink branch table. */
3116 memset (s, 0, sizeof *s);
3117 s->the_bfd = abfd;
3118 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3119 s->section = glink;
3120 s->value = glink_vma - glink->vma;
3121 s->name = names;
3122 memcpy (names, "__glink", sizeof ("__glink"));
3123 names += sizeof ("__glink");
3124 s++;
3125 count++;
3126
3127 if (resolv_vma)
3128 {
3129 /* Add a symbol for the glink PLT resolver. */
3130 memset (s, 0, sizeof *s);
3131 s->the_bfd = abfd;
3132 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3133 s->section = glink;
3134 s->value = resolv_vma - glink->vma;
3135 s->name = names;
3136 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3137 names += sizeof ("__glink_PLTresolve");
3138 s++;
3139 count++;
3140 }
3141
3142 return count;
3143 }
3144 \f
3145 /* The following functions are specific to the ELF linker, while
3146 functions above are used generally. They appear in this file more
3147 or less in the order in which they are called. eg.
3148 ppc_elf_check_relocs is called early in the link process,
3149 ppc_elf_finish_dynamic_sections is one of the last functions
3150 called. */
3151
3152 /* Track PLT entries needed for a given symbol. We might need more
3153 than one glink entry per symbol when generating a pic binary. */
3154 struct plt_entry
3155 {
3156 struct plt_entry *next;
3157
3158 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3159 This field stores the offset into .got2 used to initialise the
3160 GOT pointer reg. It will always be at least 32768. (Current
3161 gcc always uses an offset of 32768, but ld -r will pack .got2
3162 sections together resulting in larger offsets). */
3163 bfd_vma addend;
3164
3165 /* The .got2 section. */
3166 asection *sec;
3167
3168 /* PLT refcount or offset. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } plt;
3174
3175 /* .glink stub offset. */
3176 bfd_vma glink_offset;
3177 };
3178
3179 /* Of those relocs that might be copied as dynamic relocs, this function
3180 selects those that must be copied when linking a shared library,
3181 even when the symbol is local. */
3182
3183 static int
3184 must_be_dyn_reloc (struct bfd_link_info *info,
3185 enum elf_ppc_reloc_type r_type)
3186 {
3187 switch (r_type)
3188 {
3189 default:
3190 return 1;
3191
3192 case R_PPC_REL24:
3193 case R_PPC_REL14:
3194 case R_PPC_REL14_BRTAKEN:
3195 case R_PPC_REL14_BRNTAKEN:
3196 case R_PPC_REL32:
3197 return 0;
3198
3199 case R_PPC_TPREL32:
3200 case R_PPC_TPREL16:
3201 case R_PPC_TPREL16_LO:
3202 case R_PPC_TPREL16_HI:
3203 case R_PPC_TPREL16_HA:
3204 return !bfd_link_executable (info);
3205 }
3206 }
3207
3208 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3209 copying dynamic variables from a shared lib into an app's dynbss
3210 section, and instead use a dynamic relocation to point into the
3211 shared lib. */
3212 #define ELIMINATE_COPY_RELOCS 1
3213
3214 /* Used to track dynamic relocations for local symbols. */
3215 struct ppc_dyn_relocs
3216 {
3217 struct ppc_dyn_relocs *next;
3218
3219 /* The input section of the reloc. */
3220 asection *sec;
3221
3222 /* Total number of relocs copied for the input section. */
3223 unsigned int count : 31;
3224
3225 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3226 unsigned int ifunc : 1;
3227 };
3228
3229 /* PPC ELF linker hash entry. */
3230
3231 struct ppc_elf_link_hash_entry
3232 {
3233 struct elf_link_hash_entry elf;
3234
3235 /* If this symbol is used in the linker created sections, the processor
3236 specific backend uses this field to map the field into the offset
3237 from the beginning of the section. */
3238 elf_linker_section_pointers_t *linker_section_pointer;
3239
3240 /* Track dynamic relocs copied for this symbol. */
3241 struct elf_dyn_relocs *dyn_relocs;
3242
3243 /* Contexts in which symbol is used in the GOT (or TOC).
3244 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3245 corresponding relocs are encountered during check_relocs.
3246 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3247 indicate the corresponding GOT entry type is not needed. */
3248 #define TLS_GD 1 /* GD reloc. */
3249 #define TLS_LD 2 /* LD reloc. */
3250 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3251 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3252 #define TLS_TLS 16 /* Any TLS reloc. */
3253 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3254 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3255 char tls_mask;
3256
3257 /* Nonzero if we have seen a small data relocation referring to this
3258 symbol. */
3259 unsigned char has_sda_refs : 1;
3260
3261 /* Flag use of given relocations. */
3262 unsigned char has_addr16_ha : 1;
3263 unsigned char has_addr16_lo : 1;
3264 };
3265
3266 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3267
3268 /* PPC ELF linker hash table. */
3269
3270 struct ppc_elf_link_hash_table
3271 {
3272 struct elf_link_hash_table elf;
3273
3274 /* Various options passed from the linker. */
3275 struct ppc_elf_params *params;
3276
3277 /* Short-cuts to get to dynamic linker sections. */
3278 asection *glink;
3279 asection *dynbss;
3280 asection *relbss;
3281 asection *dynsbss;
3282 asection *relsbss;
3283 elf_linker_section_t sdata[2];
3284 asection *sbss;
3285 asection *glink_eh_frame;
3286
3287 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3288 asection *srelplt2;
3289
3290 /* Shortcut to __tls_get_addr. */
3291 struct elf_link_hash_entry *tls_get_addr;
3292
3293 /* The bfd that forced an old-style PLT. */
3294 bfd *old_bfd;
3295
3296 /* TLS local dynamic got entry handling. */
3297 union {
3298 bfd_signed_vma refcount;
3299 bfd_vma offset;
3300 } tlsld_got;
3301
3302 /* Offset of branch table to PltResolve function in glink. */
3303 bfd_vma glink_pltresolve;
3304
3305 /* Size of reserved GOT entries. */
3306 unsigned int got_header_size;
3307 /* Non-zero if allocating the header left a gap. */
3308 unsigned int got_gap;
3309
3310 /* The type of PLT we have chosen to use. */
3311 enum ppc_elf_plt_type plt_type;
3312
3313 /* True if the target system is VxWorks. */
3314 unsigned int is_vxworks:1;
3315
3316 /* The size of PLT entries. */
3317 int plt_entry_size;
3318 /* The distance between adjacent PLT slots. */
3319 int plt_slot_size;
3320 /* The size of the first PLT entry. */
3321 int plt_initial_entry_size;
3322
3323 /* Small local sym cache. */
3324 struct sym_cache sym_cache;
3325 };
3326
3327 /* Rename some of the generic section flags to better document how they
3328 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3329
3330 /* Nonzero if this section has TLS related relocations. */
3331 #define has_tls_reloc sec_flg0
3332
3333 /* Nonzero if this section has a call to __tls_get_addr. */
3334 #define has_tls_get_addr_call sec_flg1
3335
3336 /* Get the PPC ELF linker hash table from a link_info structure. */
3337
3338 #define ppc_elf_hash_table(p) \
3339 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3340 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3341
3342 /* Create an entry in a PPC ELF linker hash table. */
3343
3344 static struct bfd_hash_entry *
3345 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3346 struct bfd_hash_table *table,
3347 const char *string)
3348 {
3349 /* Allocate the structure if it has not already been allocated by a
3350 subclass. */
3351 if (entry == NULL)
3352 {
3353 entry = bfd_hash_allocate (table,
3354 sizeof (struct ppc_elf_link_hash_entry));
3355 if (entry == NULL)
3356 return entry;
3357 }
3358
3359 /* Call the allocation method of the superclass. */
3360 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3361 if (entry != NULL)
3362 {
3363 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3364 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3365 ppc_elf_hash_entry (entry)->tls_mask = 0;
3366 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3367 }
3368
3369 return entry;
3370 }
3371
3372 /* Create a PPC ELF linker hash table. */
3373
3374 static struct bfd_link_hash_table *
3375 ppc_elf_link_hash_table_create (bfd *abfd)
3376 {
3377 struct ppc_elf_link_hash_table *ret;
3378 static struct ppc_elf_params default_params
3379 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3380
3381 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3382 if (ret == NULL)
3383 return NULL;
3384
3385 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3386 ppc_elf_link_hash_newfunc,
3387 sizeof (struct ppc_elf_link_hash_entry),
3388 PPC32_ELF_DATA))
3389 {
3390 free (ret);
3391 return NULL;
3392 }
3393
3394 ret->elf.init_plt_refcount.refcount = 0;
3395 ret->elf.init_plt_refcount.glist = NULL;
3396 ret->elf.init_plt_offset.offset = 0;
3397 ret->elf.init_plt_offset.glist = NULL;
3398
3399 ret->params = &default_params;
3400
3401 ret->sdata[0].name = ".sdata";
3402 ret->sdata[0].sym_name = "_SDA_BASE_";
3403 ret->sdata[0].bss_name = ".sbss";
3404
3405 ret->sdata[1].name = ".sdata2";
3406 ret->sdata[1].sym_name = "_SDA2_BASE_";
3407 ret->sdata[1].bss_name = ".sbss2";
3408
3409 ret->plt_entry_size = 12;
3410 ret->plt_slot_size = 8;
3411 ret->plt_initial_entry_size = 72;
3412
3413 return &ret->elf.root;
3414 }
3415
3416 /* Hook linker params into hash table. */
3417
3418 void
3419 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3420 {
3421 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3422
3423 if (htab)
3424 htab->params = params;
3425 params->pagesize_p2 = bfd_log2 (params->pagesize);
3426 }
3427
3428 /* Create .got and the related sections. */
3429
3430 static bfd_boolean
3431 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3432 {
3433 struct ppc_elf_link_hash_table *htab;
3434
3435 if (!_bfd_elf_create_got_section (abfd, info))
3436 return FALSE;
3437
3438 htab = ppc_elf_hash_table (info);
3439 if (!htab->is_vxworks)
3440 {
3441 /* The powerpc .got has a blrl instruction in it. Mark it
3442 executable. */
3443 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3444 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3445 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3446 return FALSE;
3447 }
3448
3449 return TRUE;
3450 }
3451
3452 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3453 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3454 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3455
3456 static bfd_boolean
3457 ppc_elf_create_linker_section (bfd *abfd,
3458 struct bfd_link_info *info,
3459 flagword flags,
3460 elf_linker_section_t *lsect)
3461 {
3462 asection *s;
3463
3464 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3465 | SEC_LINKER_CREATED);
3466
3467 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3468 if (s == NULL)
3469 return FALSE;
3470 lsect->section = s;
3471
3472 /* Define the sym on the first section of this name. */
3473 s = bfd_get_section_by_name (abfd, lsect->name);
3474
3475 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3476 if (lsect->sym == NULL)
3477 return FALSE;
3478 lsect->sym->root.u.def.value = 0x8000;
3479 return TRUE;
3480 }
3481
3482 static bfd_boolean
3483 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3484 {
3485 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3486 asection *s;
3487 flagword flags;
3488
3489 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3490 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3491 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3492 htab->glink = s;
3493 if (s == NULL
3494 || !bfd_set_section_alignment (abfd, s,
3495 htab->params->ppc476_workaround ? 6 : 4))
3496 return FALSE;
3497
3498 if (!info->no_ld_generated_unwind_info)
3499 {
3500 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3501 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3502 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3503 htab->glink_eh_frame = s;
3504 if (s == NULL
3505 || !bfd_set_section_alignment (abfd, s, 2))
3506 return FALSE;
3507 }
3508
3509 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3510 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3511 htab->elf.iplt = s;
3512 if (s == NULL
3513 || !bfd_set_section_alignment (abfd, s, 4))
3514 return FALSE;
3515
3516 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3517 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3518 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3519 htab->elf.irelplt = s;
3520 if (s == NULL
3521 || ! bfd_set_section_alignment (abfd, s, 2))
3522 return FALSE;
3523
3524 if (!ppc_elf_create_linker_section (abfd, info, 0,
3525 &htab->sdata[0]))
3526 return FALSE;
3527
3528 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3529 &htab->sdata[1]))
3530 return FALSE;
3531
3532 return TRUE;
3533 }
3534
3535 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3536 to output sections (just like _bfd_elf_create_dynamic_sections has
3537 to create .dynbss and .rela.bss). */
3538
3539 static bfd_boolean
3540 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3541 {
3542 struct ppc_elf_link_hash_table *htab;
3543 asection *s;
3544 flagword flags;
3545
3546 htab = ppc_elf_hash_table (info);
3547
3548 if (htab->elf.sgot == NULL
3549 && !ppc_elf_create_got (abfd, info))
3550 return FALSE;
3551
3552 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3553 return FALSE;
3554
3555 if (htab->glink == NULL
3556 && !ppc_elf_create_glink (abfd, info))
3557 return FALSE;
3558
3559 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3560 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3561 SEC_ALLOC | SEC_LINKER_CREATED);
3562 htab->dynsbss = s;
3563 if (s == NULL)
3564 return FALSE;
3565
3566 if (! bfd_link_pic (info))
3567 {
3568 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3569 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3570 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3571 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3572 htab->relsbss = s;
3573 if (s == NULL
3574 || ! bfd_set_section_alignment (abfd, s, 2))
3575 return FALSE;
3576 }
3577
3578 if (htab->is_vxworks
3579 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3580 return FALSE;
3581
3582 s = htab->elf.splt;
3583 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3584 if (htab->plt_type == PLT_VXWORKS)
3585 /* The VxWorks PLT is a loaded section with contents. */
3586 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3587 return bfd_set_section_flags (abfd, s, flags);
3588 }
3589
3590 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3591
3592 static void
3593 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3594 struct elf_link_hash_entry *dir,
3595 struct elf_link_hash_entry *ind)
3596 {
3597 struct ppc_elf_link_hash_entry *edir, *eind;
3598
3599 edir = (struct ppc_elf_link_hash_entry *) dir;
3600 eind = (struct ppc_elf_link_hash_entry *) ind;
3601
3602 edir->tls_mask |= eind->tls_mask;
3603 edir->has_sda_refs |= eind->has_sda_refs;
3604
3605 /* If called to transfer flags for a weakdef during processing
3606 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3607 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3608 if (!(ELIMINATE_COPY_RELOCS
3609 && eind->elf.root.type != bfd_link_hash_indirect
3610 && edir->elf.dynamic_adjusted))
3611 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3612
3613 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3614 edir->elf.ref_regular |= eind->elf.ref_regular;
3615 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3616 edir->elf.needs_plt |= eind->elf.needs_plt;
3617 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3618
3619 if (eind->dyn_relocs != NULL)
3620 {
3621 if (edir->dyn_relocs != NULL)
3622 {
3623 struct elf_dyn_relocs **pp;
3624 struct elf_dyn_relocs *p;
3625
3626 /* Add reloc counts against the indirect sym to the direct sym
3627 list. Merge any entries against the same section. */
3628 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3629 {
3630 struct elf_dyn_relocs *q;
3631
3632 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3633 if (q->sec == p->sec)
3634 {
3635 q->pc_count += p->pc_count;
3636 q->count += p->count;
3637 *pp = p->next;
3638 break;
3639 }
3640 if (q == NULL)
3641 pp = &p->next;
3642 }
3643 *pp = edir->dyn_relocs;
3644 }
3645
3646 edir->dyn_relocs = eind->dyn_relocs;
3647 eind->dyn_relocs = NULL;
3648 }
3649
3650 /* If we were called to copy over info for a weak sym, that's all.
3651 You might think dyn_relocs need not be copied over; After all,
3652 both syms will be dynamic or both non-dynamic so we're just
3653 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3654 code in ppc_elf_adjust_dynamic_symbol needs to check for
3655 dyn_relocs in read-only sections, and it does so on what is the
3656 DIR sym here. */
3657 if (eind->elf.root.type != bfd_link_hash_indirect)
3658 return;
3659
3660 /* Copy over the GOT refcount entries that we may have already seen to
3661 the symbol which just became indirect. */
3662 edir->elf.got.refcount += eind->elf.got.refcount;
3663 eind->elf.got.refcount = 0;
3664
3665 /* And plt entries. */
3666 if (eind->elf.plt.plist != NULL)
3667 {
3668 if (edir->elf.plt.plist != NULL)
3669 {
3670 struct plt_entry **entp;
3671 struct plt_entry *ent;
3672
3673 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3674 {
3675 struct plt_entry *dent;
3676
3677 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3678 if (dent->sec == ent->sec && dent->addend == ent->addend)
3679 {
3680 dent->plt.refcount += ent->plt.refcount;
3681 *entp = ent->next;
3682 break;
3683 }
3684 if (dent == NULL)
3685 entp = &ent->next;
3686 }
3687 *entp = edir->elf.plt.plist;
3688 }
3689
3690 edir->elf.plt.plist = eind->elf.plt.plist;
3691 eind->elf.plt.plist = NULL;
3692 }
3693
3694 if (eind->elf.dynindx != -1)
3695 {
3696 if (edir->elf.dynindx != -1)
3697 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3698 edir->elf.dynstr_index);
3699 edir->elf.dynindx = eind->elf.dynindx;
3700 edir->elf.dynstr_index = eind->elf.dynstr_index;
3701 eind->elf.dynindx = -1;
3702 eind->elf.dynstr_index = 0;
3703 }
3704 }
3705
3706 /* Hook called by the linker routine which adds symbols from an object
3707 file. We use it to put .comm items in .sbss, and not .bss. */
3708
3709 static bfd_boolean
3710 ppc_elf_add_symbol_hook (bfd *abfd,
3711 struct bfd_link_info *info,
3712 Elf_Internal_Sym *sym,
3713 const char **namep ATTRIBUTE_UNUSED,
3714 flagword *flagsp ATTRIBUTE_UNUSED,
3715 asection **secp,
3716 bfd_vma *valp)
3717 {
3718 if (sym->st_shndx == SHN_COMMON
3719 && !bfd_link_relocatable (info)
3720 && is_ppc_elf (info->output_bfd)
3721 && sym->st_size <= elf_gp_size (abfd))
3722 {
3723 /* Common symbols less than or equal to -G nn bytes are automatically
3724 put into .sbss. */
3725 struct ppc_elf_link_hash_table *htab;
3726
3727 htab = ppc_elf_hash_table (info);
3728 if (htab->sbss == NULL)
3729 {
3730 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3731
3732 if (!htab->elf.dynobj)
3733 htab->elf.dynobj = abfd;
3734
3735 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3736 ".sbss",
3737 flags);
3738 if (htab->sbss == NULL)
3739 return FALSE;
3740 }
3741
3742 *secp = htab->sbss;
3743 *valp = sym->st_size;
3744 }
3745
3746 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3747 && (abfd->flags & DYNAMIC) == 0
3748 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3749 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3750
3751 return TRUE;
3752 }
3753 \f
3754 /* Find a linker generated pointer with a given addend and type. */
3755
3756 static elf_linker_section_pointers_t *
3757 elf_find_pointer_linker_section
3758 (elf_linker_section_pointers_t *linker_pointers,
3759 bfd_vma addend,
3760 elf_linker_section_t *lsect)
3761 {
3762 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3763 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3764 return linker_pointers;
3765
3766 return NULL;
3767 }
3768
3769 /* Allocate a pointer to live in a linker created section. */
3770
3771 static bfd_boolean
3772 elf_allocate_pointer_linker_section (bfd *abfd,
3773 elf_linker_section_t *lsect,
3774 struct elf_link_hash_entry *h,
3775 const Elf_Internal_Rela *rel)
3776 {
3777 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3778 elf_linker_section_pointers_t *linker_section_ptr;
3779 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3780 bfd_size_type amt;
3781
3782 BFD_ASSERT (lsect != NULL);
3783
3784 /* Is this a global symbol? */
3785 if (h != NULL)
3786 {
3787 struct ppc_elf_link_hash_entry *eh;
3788
3789 /* Has this symbol already been allocated? If so, our work is done. */
3790 eh = (struct ppc_elf_link_hash_entry *) h;
3791 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3792 rel->r_addend,
3793 lsect))
3794 return TRUE;
3795
3796 ptr_linker_section_ptr = &eh->linker_section_pointer;
3797 }
3798 else
3799 {
3800 BFD_ASSERT (is_ppc_elf (abfd));
3801
3802 /* Allocation of a pointer to a local symbol. */
3803 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3804
3805 /* Allocate a table to hold the local symbols if first time. */
3806 if (!ptr)
3807 {
3808 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3809
3810 amt = num_symbols;
3811 amt *= sizeof (elf_linker_section_pointers_t *);
3812 ptr = bfd_zalloc (abfd, amt);
3813
3814 if (!ptr)
3815 return FALSE;
3816
3817 elf_local_ptr_offsets (abfd) = ptr;
3818 }
3819
3820 /* Has this symbol already been allocated? If so, our work is done. */
3821 if (elf_find_pointer_linker_section (ptr[r_symndx],
3822 rel->r_addend,
3823 lsect))
3824 return TRUE;
3825
3826 ptr_linker_section_ptr = &ptr[r_symndx];
3827 }
3828
3829 /* Allocate space for a pointer in the linker section, and allocate
3830 a new pointer record from internal memory. */
3831 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3832 amt = sizeof (elf_linker_section_pointers_t);
3833 linker_section_ptr = bfd_alloc (abfd, amt);
3834
3835 if (!linker_section_ptr)
3836 return FALSE;
3837
3838 linker_section_ptr->next = *ptr_linker_section_ptr;
3839 linker_section_ptr->addend = rel->r_addend;
3840 linker_section_ptr->lsect = lsect;
3841 *ptr_linker_section_ptr = linker_section_ptr;
3842
3843 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3844 return FALSE;
3845 linker_section_ptr->offset = lsect->section->size;
3846 lsect->section->size += 4;
3847
3848 #ifdef DEBUG
3849 fprintf (stderr,
3850 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3851 lsect->name, (long) linker_section_ptr->offset,
3852 (long) lsect->section->size);
3853 #endif
3854
3855 return TRUE;
3856 }
3857
3858 static struct plt_entry **
3859 update_local_sym_info (bfd *abfd,
3860 Elf_Internal_Shdr *symtab_hdr,
3861 unsigned long r_symndx,
3862 int tls_type)
3863 {
3864 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3865 struct plt_entry **local_plt;
3866 char *local_got_tls_masks;
3867
3868 if (local_got_refcounts == NULL)
3869 {
3870 bfd_size_type size = symtab_hdr->sh_info;
3871
3872 size *= (sizeof (*local_got_refcounts)
3873 + sizeof (*local_plt)
3874 + sizeof (*local_got_tls_masks));
3875 local_got_refcounts = bfd_zalloc (abfd, size);
3876 if (local_got_refcounts == NULL)
3877 return NULL;
3878 elf_local_got_refcounts (abfd) = local_got_refcounts;
3879 }
3880
3881 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3882 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3883 local_got_tls_masks[r_symndx] |= tls_type;
3884 if (tls_type != PLT_IFUNC)
3885 local_got_refcounts[r_symndx] += 1;
3886 return local_plt + r_symndx;
3887 }
3888
3889 static bfd_boolean
3890 update_plt_info (bfd *abfd, struct plt_entry **plist,
3891 asection *sec, bfd_vma addend)
3892 {
3893 struct plt_entry *ent;
3894
3895 if (addend < 32768)
3896 sec = NULL;
3897 for (ent = *plist; ent != NULL; ent = ent->next)
3898 if (ent->sec == sec && ent->addend == addend)
3899 break;
3900 if (ent == NULL)
3901 {
3902 bfd_size_type amt = sizeof (*ent);
3903 ent = bfd_alloc (abfd, amt);
3904 if (ent == NULL)
3905 return FALSE;
3906 ent->next = *plist;
3907 ent->sec = sec;
3908 ent->addend = addend;
3909 ent->plt.refcount = 0;
3910 *plist = ent;
3911 }
3912 ent->plt.refcount += 1;
3913 return TRUE;
3914 }
3915
3916 static struct plt_entry *
3917 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3918 {
3919 struct plt_entry *ent;
3920
3921 if (addend < 32768)
3922 sec = NULL;
3923 for (ent = *plist; ent != NULL; ent = ent->next)
3924 if (ent->sec == sec && ent->addend == addend)
3925 break;
3926 return ent;
3927 }
3928
3929 static bfd_boolean
3930 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3931 {
3932 return (r_type == R_PPC_PLTREL24
3933 || r_type == R_PPC_LOCAL24PC
3934 || r_type == R_PPC_REL24
3935 || r_type == R_PPC_REL14
3936 || r_type == R_PPC_REL14_BRTAKEN
3937 || r_type == R_PPC_REL14_BRNTAKEN
3938 || r_type == R_PPC_ADDR24
3939 || r_type == R_PPC_ADDR14
3940 || r_type == R_PPC_ADDR14_BRTAKEN
3941 || r_type == R_PPC_ADDR14_BRNTAKEN
3942 || r_type == R_PPC_VLE_REL24);
3943 }
3944
3945 static void
3946 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3947 {
3948 _bfd_error_handler
3949 /* xgettext:c-format */
3950 (_("%B: relocation %s cannot be used when making a shared object"),
3951 abfd,
3952 ppc_elf_howto_table[r_type]->name);
3953 bfd_set_error (bfd_error_bad_value);
3954 }
3955
3956 /* Look through the relocs for a section during the first phase, and
3957 allocate space in the global offset table or procedure linkage
3958 table. */
3959
3960 static bfd_boolean
3961 ppc_elf_check_relocs (bfd *abfd,
3962 struct bfd_link_info *info,
3963 asection *sec,
3964 const Elf_Internal_Rela *relocs)
3965 {
3966 struct ppc_elf_link_hash_table *htab;
3967 Elf_Internal_Shdr *symtab_hdr;
3968 struct elf_link_hash_entry **sym_hashes;
3969 const Elf_Internal_Rela *rel;
3970 const Elf_Internal_Rela *rel_end;
3971 asection *got2, *sreloc;
3972 struct elf_link_hash_entry *tga;
3973
3974 if (bfd_link_relocatable (info))
3975 return TRUE;
3976
3977 /* Don't do anything special with non-loaded, non-alloced sections.
3978 In particular, any relocs in such sections should not affect GOT
3979 and PLT reference counting (ie. we don't allow them to create GOT
3980 or PLT entries), there's no possibility or desire to optimize TLS
3981 relocs, and there's not much point in propagating relocs to shared
3982 libs that the dynamic linker won't relocate. */
3983 if ((sec->flags & SEC_ALLOC) == 0)
3984 return TRUE;
3985
3986 #ifdef DEBUG
3987 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3988 sec, abfd);
3989 #endif
3990
3991 BFD_ASSERT (is_ppc_elf (abfd));
3992
3993 /* Initialize howto table if not already done. */
3994 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3995 ppc_elf_howto_init ();
3996
3997 htab = ppc_elf_hash_table (info);
3998 if (htab->glink == NULL)
3999 {
4000 if (htab->elf.dynobj == NULL)
4001 htab->elf.dynobj = abfd;
4002 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4003 return FALSE;
4004 }
4005 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4006 FALSE, FALSE, TRUE);
4007 symtab_hdr = &elf_symtab_hdr (abfd);
4008 sym_hashes = elf_sym_hashes (abfd);
4009 got2 = bfd_get_section_by_name (abfd, ".got2");
4010 sreloc = NULL;
4011
4012 rel_end = relocs + sec->reloc_count;
4013 for (rel = relocs; rel < rel_end; rel++)
4014 {
4015 unsigned long r_symndx;
4016 enum elf_ppc_reloc_type r_type;
4017 struct elf_link_hash_entry *h;
4018 int tls_type;
4019 struct plt_entry **ifunc;
4020
4021 r_symndx = ELF32_R_SYM (rel->r_info);
4022 if (r_symndx < symtab_hdr->sh_info)
4023 h = NULL;
4024 else
4025 {
4026 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4027 while (h->root.type == bfd_link_hash_indirect
4028 || h->root.type == bfd_link_hash_warning)
4029 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4030
4031 /* PR15323, ref flags aren't set for references in the same
4032 object. */
4033 h->root.non_ir_ref = 1;
4034 }
4035
4036 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4037 This shows up in particular in an R_PPC_ADDR32 in the eabi
4038 startup code. */
4039 if (h != NULL
4040 && htab->elf.sgot == NULL
4041 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4042 {
4043 if (htab->elf.dynobj == NULL)
4044 htab->elf.dynobj = abfd;
4045 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4046 return FALSE;
4047 BFD_ASSERT (h == htab->elf.hgot);
4048 }
4049
4050 tls_type = 0;
4051 r_type = ELF32_R_TYPE (rel->r_info);
4052 ifunc = NULL;
4053 if (h == NULL && !htab->is_vxworks)
4054 {
4055 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4056 abfd, r_symndx);
4057 if (isym == NULL)
4058 return FALSE;
4059
4060 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4061 {
4062 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4063 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4064 PLT_IFUNC);
4065 if (ifunc == NULL)
4066 return FALSE;
4067
4068 /* STT_GNU_IFUNC symbols must have a PLT entry;
4069 In a non-pie executable even when there are
4070 no plt calls. */
4071 if (!bfd_link_pic (info)
4072 || is_branch_reloc (r_type))
4073 {
4074 bfd_vma addend = 0;
4075 if (r_type == R_PPC_PLTREL24)
4076 {
4077 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4078 if (bfd_link_pic (info))
4079 addend = rel->r_addend;
4080 }
4081 if (!update_plt_info (abfd, ifunc, got2, addend))
4082 return FALSE;
4083 }
4084 }
4085 }
4086
4087 if (!htab->is_vxworks
4088 && is_branch_reloc (r_type)
4089 && h != NULL
4090 && h == tga)
4091 {
4092 if (rel != relocs
4093 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4094 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4095 /* We have a new-style __tls_get_addr call with a marker
4096 reloc. */
4097 ;
4098 else
4099 /* Mark this section as having an old-style call. */
4100 sec->has_tls_get_addr_call = 1;
4101 }
4102
4103 switch (r_type)
4104 {
4105 case R_PPC_TLSGD:
4106 case R_PPC_TLSLD:
4107 /* These special tls relocs tie a call to __tls_get_addr with
4108 its parameter symbol. */
4109 break;
4110
4111 case R_PPC_GOT_TLSLD16:
4112 case R_PPC_GOT_TLSLD16_LO:
4113 case R_PPC_GOT_TLSLD16_HI:
4114 case R_PPC_GOT_TLSLD16_HA:
4115 tls_type = TLS_TLS | TLS_LD;
4116 goto dogottls;
4117
4118 case R_PPC_GOT_TLSGD16:
4119 case R_PPC_GOT_TLSGD16_LO:
4120 case R_PPC_GOT_TLSGD16_HI:
4121 case R_PPC_GOT_TLSGD16_HA:
4122 tls_type = TLS_TLS | TLS_GD;
4123 goto dogottls;
4124
4125 case R_PPC_GOT_TPREL16:
4126 case R_PPC_GOT_TPREL16_LO:
4127 case R_PPC_GOT_TPREL16_HI:
4128 case R_PPC_GOT_TPREL16_HA:
4129 if (bfd_link_pic (info))
4130 info->flags |= DF_STATIC_TLS;
4131 tls_type = TLS_TLS | TLS_TPREL;
4132 goto dogottls;
4133
4134 case R_PPC_GOT_DTPREL16:
4135 case R_PPC_GOT_DTPREL16_LO:
4136 case R_PPC_GOT_DTPREL16_HI:
4137 case R_PPC_GOT_DTPREL16_HA:
4138 tls_type = TLS_TLS | TLS_DTPREL;
4139 dogottls:
4140 sec->has_tls_reloc = 1;
4141 /* Fall through. */
4142
4143 /* GOT16 relocations */
4144 case R_PPC_GOT16:
4145 case R_PPC_GOT16_LO:
4146 case R_PPC_GOT16_HI:
4147 case R_PPC_GOT16_HA:
4148 /* This symbol requires a global offset table entry. */
4149 if (htab->elf.sgot == NULL)
4150 {
4151 if (htab->elf.dynobj == NULL)
4152 htab->elf.dynobj = abfd;
4153 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4154 return FALSE;
4155 }
4156 if (h != NULL)
4157 {
4158 h->got.refcount += 1;
4159 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4160 }
4161 else
4162 /* This is a global offset table entry for a local symbol. */
4163 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4164 return FALSE;
4165
4166 /* We may also need a plt entry if the symbol turns out to be
4167 an ifunc. */
4168 if (h != NULL && !bfd_link_pic (info))
4169 {
4170 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4171 return FALSE;
4172 }
4173 break;
4174
4175 /* Indirect .sdata relocation. */
4176 case R_PPC_EMB_SDAI16:
4177 if (bfd_link_pic (info))
4178 {
4179 bad_shared_reloc (abfd, r_type);
4180 return FALSE;
4181 }
4182 htab->sdata[0].sym->ref_regular = 1;
4183 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4184 h, rel))
4185 return FALSE;
4186 if (h != NULL)
4187 {
4188 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4189 h->non_got_ref = TRUE;
4190 }
4191 break;
4192
4193 /* Indirect .sdata2 relocation. */
4194 case R_PPC_EMB_SDA2I16:
4195 if (bfd_link_pic (info))
4196 {
4197 bad_shared_reloc (abfd, r_type);
4198 return FALSE;
4199 }
4200 htab->sdata[1].sym->ref_regular = 1;
4201 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4202 h, rel))
4203 return FALSE;
4204 if (h != NULL)
4205 {
4206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4207 h->non_got_ref = TRUE;
4208 }
4209 break;
4210
4211 case R_PPC_SDAREL16:
4212 htab->sdata[0].sym->ref_regular = 1;
4213 /* Fall through. */
4214
4215 case R_PPC_VLE_SDAREL_LO16A:
4216 case R_PPC_VLE_SDAREL_LO16D:
4217 case R_PPC_VLE_SDAREL_HI16A:
4218 case R_PPC_VLE_SDAREL_HI16D:
4219 case R_PPC_VLE_SDAREL_HA16A:
4220 case R_PPC_VLE_SDAREL_HA16D:
4221 if (h != NULL)
4222 {
4223 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4224 h->non_got_ref = TRUE;
4225 }
4226 break;
4227
4228 case R_PPC_VLE_REL8:
4229 case R_PPC_VLE_REL15:
4230 case R_PPC_VLE_REL24:
4231 case R_PPC_VLE_LO16A:
4232 case R_PPC_VLE_LO16D:
4233 case R_PPC_VLE_HI16A:
4234 case R_PPC_VLE_HI16D:
4235 case R_PPC_VLE_HA16A:
4236 case R_PPC_VLE_HA16D:
4237 break;
4238
4239 case R_PPC_EMB_SDA2REL:
4240 if (bfd_link_pic (info))
4241 {
4242 bad_shared_reloc (abfd, r_type);
4243 return FALSE;
4244 }
4245 htab->sdata[1].sym->ref_regular = 1;
4246 if (h != NULL)
4247 {
4248 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4249 h->non_got_ref = TRUE;
4250 }
4251 break;
4252
4253 case R_PPC_VLE_SDA21_LO:
4254 case R_PPC_VLE_SDA21:
4255 case R_PPC_EMB_SDA21:
4256 case R_PPC_EMB_RELSDA:
4257 if (bfd_link_pic (info))
4258 {
4259 bad_shared_reloc (abfd, r_type);
4260 return FALSE;
4261 }
4262 if (h != NULL)
4263 {
4264 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4265 h->non_got_ref = TRUE;
4266 }
4267 break;
4268
4269 case R_PPC_EMB_NADDR32:
4270 case R_PPC_EMB_NADDR16:
4271 case R_PPC_EMB_NADDR16_LO:
4272 case R_PPC_EMB_NADDR16_HI:
4273 case R_PPC_EMB_NADDR16_HA:
4274 if (bfd_link_pic (info))
4275 {
4276 bad_shared_reloc (abfd, r_type);
4277 return FALSE;
4278 }
4279 if (h != NULL)
4280 h->non_got_ref = TRUE;
4281 break;
4282
4283 case R_PPC_PLTREL24:
4284 if (h == NULL)
4285 break;
4286 /* Fall through */
4287 case R_PPC_PLT32:
4288 case R_PPC_PLTREL32:
4289 case R_PPC_PLT16_LO:
4290 case R_PPC_PLT16_HI:
4291 case R_PPC_PLT16_HA:
4292 #ifdef DEBUG
4293 fprintf (stderr, "Reloc requires a PLT entry\n");
4294 #endif
4295 /* This symbol requires a procedure linkage table entry. */
4296 if (h == NULL)
4297 {
4298 if (ifunc == NULL)
4299 {
4300 /* It does not make sense to have a procedure linkage
4301 table entry for a non-ifunc local symbol. */
4302 info->callbacks->einfo
4303 /* xgettext:c-format */
4304 (_("%P: %H: %s reloc against local symbol\n"),
4305 abfd, sec, rel->r_offset,
4306 ppc_elf_howto_table[r_type]->name);
4307 bfd_set_error (bfd_error_bad_value);
4308 return FALSE;
4309 }
4310 }
4311 else
4312 {
4313 bfd_vma addend = 0;
4314
4315 if (r_type == R_PPC_PLTREL24)
4316 {
4317 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4318 if (bfd_link_pic (info))
4319 addend = rel->r_addend;
4320 }
4321 h->needs_plt = 1;
4322 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4323 return FALSE;
4324 }
4325 break;
4326
4327 /* The following relocations don't need to propagate the
4328 relocation if linking a shared object since they are
4329 section relative. */
4330 case R_PPC_SECTOFF:
4331 case R_PPC_SECTOFF_LO:
4332 case R_PPC_SECTOFF_HI:
4333 case R_PPC_SECTOFF_HA:
4334 case R_PPC_DTPREL16:
4335 case R_PPC_DTPREL16_LO:
4336 case R_PPC_DTPREL16_HI:
4337 case R_PPC_DTPREL16_HA:
4338 case R_PPC_TOC16:
4339 break;
4340
4341 case R_PPC_REL16:
4342 case R_PPC_REL16_LO:
4343 case R_PPC_REL16_HI:
4344 case R_PPC_REL16_HA:
4345 case R_PPC_REL16DX_HA:
4346 ppc_elf_tdata (abfd)->has_rel16 = 1;
4347 break;
4348
4349 /* These are just markers. */
4350 case R_PPC_TLS:
4351 case R_PPC_EMB_MRKREF:
4352 case R_PPC_NONE:
4353 case R_PPC_max:
4354 case R_PPC_RELAX:
4355 case R_PPC_RELAX_PLT:
4356 case R_PPC_RELAX_PLTREL24:
4357 break;
4358
4359 /* These should only appear in dynamic objects. */
4360 case R_PPC_COPY:
4361 case R_PPC_GLOB_DAT:
4362 case R_PPC_JMP_SLOT:
4363 case R_PPC_RELATIVE:
4364 case R_PPC_IRELATIVE:
4365 break;
4366
4367 /* These aren't handled yet. We'll report an error later. */
4368 case R_PPC_ADDR30:
4369 case R_PPC_EMB_RELSEC16:
4370 case R_PPC_EMB_RELST_LO:
4371 case R_PPC_EMB_RELST_HI:
4372 case R_PPC_EMB_RELST_HA:
4373 case R_PPC_EMB_BIT_FLD:
4374 break;
4375
4376 /* This refers only to functions defined in the shared library. */
4377 case R_PPC_LOCAL24PC:
4378 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4379 {
4380 htab->plt_type = PLT_OLD;
4381 htab->old_bfd = abfd;
4382 }
4383 if (h != NULL && h->type == STT_GNU_IFUNC)
4384 {
4385 h->needs_plt = 1;
4386 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4387 return FALSE;
4388 }
4389 break;
4390
4391 /* This relocation describes the C++ object vtable hierarchy.
4392 Reconstruct it for later use during GC. */
4393 case R_PPC_GNU_VTINHERIT:
4394 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4395 return FALSE;
4396 break;
4397
4398 /* This relocation describes which C++ vtable entries are actually
4399 used. Record for later use during GC. */
4400 case R_PPC_GNU_VTENTRY:
4401 BFD_ASSERT (h != NULL);
4402 if (h != NULL
4403 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4404 return FALSE;
4405 break;
4406
4407 /* We shouldn't really be seeing these. */
4408 case R_PPC_TPREL32:
4409 case R_PPC_TPREL16:
4410 case R_PPC_TPREL16_LO:
4411 case R_PPC_TPREL16_HI:
4412 case R_PPC_TPREL16_HA:
4413 if (bfd_link_pic (info))
4414 info->flags |= DF_STATIC_TLS;
4415 goto dodyn;
4416
4417 /* Nor these. */
4418 case R_PPC_DTPMOD32:
4419 case R_PPC_DTPREL32:
4420 goto dodyn;
4421
4422 case R_PPC_REL32:
4423 if (h == NULL
4424 && got2 != NULL
4425 && (sec->flags & SEC_CODE) != 0
4426 && bfd_link_pic (info)
4427 && htab->plt_type == PLT_UNSET)
4428 {
4429 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4430 the start of a function, which assembles to a REL32
4431 reference to .got2. If we detect one of these, then
4432 force the old PLT layout because the linker cannot
4433 reliably deduce the GOT pointer value needed for
4434 PLT call stubs. */
4435 asection *s;
4436 Elf_Internal_Sym *isym;
4437
4438 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4439 abfd, r_symndx);
4440 if (isym == NULL)
4441 return FALSE;
4442
4443 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4444 if (s == got2)
4445 {
4446 htab->plt_type = PLT_OLD;
4447 htab->old_bfd = abfd;
4448 }
4449 }
4450 if (h == NULL || h == htab->elf.hgot)
4451 break;
4452 /* fall through */
4453
4454 case R_PPC_ADDR32:
4455 case R_PPC_ADDR16:
4456 case R_PPC_ADDR16_LO:
4457 case R_PPC_ADDR16_HI:
4458 case R_PPC_ADDR16_HA:
4459 case R_PPC_UADDR32:
4460 case R_PPC_UADDR16:
4461 if (h != NULL && !bfd_link_pic (info))
4462 {
4463 /* We may need a plt entry if the symbol turns out to be
4464 a function defined in a dynamic object. */
4465 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4466 return FALSE;
4467
4468 /* We may need a copy reloc too. */
4469 h->non_got_ref = 1;
4470 h->pointer_equality_needed = 1;
4471 if (r_type == R_PPC_ADDR16_HA)
4472 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4473 if (r_type == R_PPC_ADDR16_LO)
4474 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4475 }
4476 goto dodyn;
4477
4478 case R_PPC_REL24:
4479 case R_PPC_REL14:
4480 case R_PPC_REL14_BRTAKEN:
4481 case R_PPC_REL14_BRNTAKEN:
4482 if (h == NULL)
4483 break;
4484 if (h == htab->elf.hgot)
4485 {
4486 if (htab->plt_type == PLT_UNSET)
4487 {
4488 htab->plt_type = PLT_OLD;
4489 htab->old_bfd = abfd;
4490 }
4491 break;
4492 }
4493 /* fall through */
4494
4495 case R_PPC_ADDR24:
4496 case R_PPC_ADDR14:
4497 case R_PPC_ADDR14_BRTAKEN:
4498 case R_PPC_ADDR14_BRNTAKEN:
4499 if (h != NULL && !bfd_link_pic (info))
4500 {
4501 /* We may need a plt entry if the symbol turns out to be
4502 a function defined in a dynamic object. */
4503 h->needs_plt = 1;
4504 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4505 return FALSE;
4506 break;
4507 }
4508
4509 dodyn:
4510 /* If we are creating a shared library, and this is a reloc
4511 against a global symbol, or a non PC relative reloc
4512 against a local symbol, then we need to copy the reloc
4513 into the shared library. However, if we are linking with
4514 -Bsymbolic, we do not need to copy a reloc against a
4515 global symbol which is defined in an object we are
4516 including in the link (i.e., DEF_REGULAR is set). At
4517 this point we have not seen all the input files, so it is
4518 possible that DEF_REGULAR is not set now but will be set
4519 later (it is never cleared). In case of a weak definition,
4520 DEF_REGULAR may be cleared later by a strong definition in
4521 a shared library. We account for that possibility below by
4522 storing information in the dyn_relocs field of the hash
4523 table entry. A similar situation occurs when creating
4524 shared libraries and symbol visibility changes render the
4525 symbol local.
4526
4527 If on the other hand, we are creating an executable, we
4528 may need to keep relocations for symbols satisfied by a
4529 dynamic library if we manage to avoid copy relocs for the
4530 symbol. */
4531 if ((bfd_link_pic (info)
4532 && (must_be_dyn_reloc (info, r_type)
4533 || (h != NULL
4534 && (!SYMBOLIC_BIND (info, h)
4535 || h->root.type == bfd_link_hash_defweak
4536 || !h->def_regular))))
4537 || (ELIMINATE_COPY_RELOCS
4538 && !bfd_link_pic (info)
4539 && h != NULL
4540 && (h->root.type == bfd_link_hash_defweak
4541 || !h->def_regular)))
4542 {
4543 #ifdef DEBUG
4544 fprintf (stderr,
4545 "ppc_elf_check_relocs needs to "
4546 "create relocation for %s\n",
4547 (h && h->root.root.string
4548 ? h->root.root.string : "<unknown>"));
4549 #endif
4550 if (sreloc == NULL)
4551 {
4552 if (htab->elf.dynobj == NULL)
4553 htab->elf.dynobj = abfd;
4554
4555 sreloc = _bfd_elf_make_dynamic_reloc_section
4556 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4557
4558 if (sreloc == NULL)
4559 return FALSE;
4560 }
4561
4562 /* If this is a global symbol, we count the number of
4563 relocations we need for this symbol. */
4564 if (h != NULL)
4565 {
4566 struct elf_dyn_relocs *p;
4567 struct elf_dyn_relocs **rel_head;
4568
4569 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4570 p = *rel_head;
4571 if (p == NULL || p->sec != sec)
4572 {
4573 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4574 if (p == NULL)
4575 return FALSE;
4576 p->next = *rel_head;
4577 *rel_head = p;
4578 p->sec = sec;
4579 p->count = 0;
4580 p->pc_count = 0;
4581 }
4582 p->count += 1;
4583 if (!must_be_dyn_reloc (info, r_type))
4584 p->pc_count += 1;
4585 }
4586 else
4587 {
4588 /* Track dynamic relocs needed for local syms too.
4589 We really need local syms available to do this
4590 easily. Oh well. */
4591 struct ppc_dyn_relocs *p;
4592 struct ppc_dyn_relocs **rel_head;
4593 bfd_boolean is_ifunc;
4594 asection *s;
4595 void *vpp;
4596 Elf_Internal_Sym *isym;
4597
4598 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4599 abfd, r_symndx);
4600 if (isym == NULL)
4601 return FALSE;
4602
4603 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4604 if (s == NULL)
4605 s = sec;
4606
4607 vpp = &elf_section_data (s)->local_dynrel;
4608 rel_head = (struct ppc_dyn_relocs **) vpp;
4609 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4610 p = *rel_head;
4611 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4612 p = p->next;
4613 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4614 {
4615 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4616 if (p == NULL)
4617 return FALSE;
4618 p->next = *rel_head;
4619 *rel_head = p;
4620 p->sec = sec;
4621 p->ifunc = is_ifunc;
4622 p->count = 0;
4623 }
4624 p->count += 1;
4625 }
4626 }
4627
4628 break;
4629 }
4630 }
4631
4632 return TRUE;
4633 }
4634 \f
4635 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4636 and OBFD, and merge non-conflicting ones. */
4637 void
4638 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4639 {
4640 bfd *obfd = info->output_bfd;
4641 obj_attribute *in_attr, *in_attrs;
4642 obj_attribute *out_attr, *out_attrs;
4643
4644 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4645 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4646
4647 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4648 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4649
4650 if (in_attr->i != out_attr->i)
4651 {
4652 int in_fp = in_attr->i & 3;
4653 int out_fp = out_attr->i & 3;
4654
4655 if (in_fp == 0)
4656 ;
4657 else if (out_fp == 0)
4658 {
4659 out_attr->type = 1;
4660 out_attr->i ^= in_fp;
4661 }
4662 else if (out_fp != 2 && in_fp == 2)
4663 _bfd_error_handler
4664 /* xgettext:c-format */
4665 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4666 else if (out_fp == 2 && in_fp != 2)
4667 _bfd_error_handler
4668 /* xgettext:c-format */
4669 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4670 else if (out_fp == 1 && in_fp == 3)
4671 _bfd_error_handler
4672 /* xgettext:c-format */
4673 (_("Warning: %B uses double-precision hard float, "
4674 "%B uses single-precision hard float"), obfd, ibfd);
4675 else if (out_fp == 3 && in_fp == 1)
4676 _bfd_error_handler
4677 /* xgettext:c-format */
4678 (_("Warning: %B uses double-precision hard float, "
4679 "%B uses single-precision hard float"), ibfd, obfd);
4680
4681 in_fp = in_attr->i & 0xc;
4682 out_fp = out_attr->i & 0xc;
4683 if (in_fp == 0)
4684 ;
4685 else if (out_fp == 0)
4686 {
4687 out_attr->type = 1;
4688 out_attr->i ^= in_fp;
4689 }
4690 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4691 _bfd_error_handler
4692 /* xgettext:c-format */
4693 (_("Warning: %B uses 64-bit long double, "
4694 "%B uses 128-bit long double"), ibfd, obfd);
4695 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4696 _bfd_error_handler
4697 /* xgettext:c-format */
4698 (_("Warning: %B uses 64-bit long double, "
4699 "%B uses 128-bit long double"), obfd, ibfd);
4700 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4701 _bfd_error_handler
4702 /* xgettext:c-format */
4703 (_("Warning: %B uses IBM long double, "
4704 "%B uses IEEE long double"), ibfd, obfd);
4705 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4706 _bfd_error_handler
4707 /* xgettext:c-format */
4708 (_("Warning: %B uses IBM long double, "
4709 "%B uses IEEE long double"), obfd, ibfd);
4710 }
4711 }
4712
4713 /* Merge object attributes from IBFD into OBFD. Warn if
4714 there are conflicting attributes. */
4715 static bfd_boolean
4716 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4717 {
4718 bfd *obfd;
4719 obj_attribute *in_attr, *in_attrs;
4720 obj_attribute *out_attr, *out_attrs;
4721
4722 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4723
4724 obfd = info->output_bfd;
4725 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4726 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4727
4728 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4729 merge non-conflicting ones. */
4730 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4731 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4732 if (in_attr->i != out_attr->i)
4733 {
4734 int in_vec = in_attr->i & 3;
4735 int out_vec = out_attr->i & 3;
4736
4737 if (in_vec == 0)
4738 ;
4739 else if (out_vec == 0)
4740 {
4741 out_attr->type = 1;
4742 out_attr->i = in_vec;
4743 }
4744 /* For now, allow generic to transition to AltiVec or SPE
4745 without a warning. If GCC marked files with their stack
4746 alignment and used don't-care markings for files which are
4747 not affected by the vector ABI, we could warn about this
4748 case too. */
4749 else if (in_vec == 1)
4750 ;
4751 else if (out_vec == 1)
4752 {
4753 out_attr->type = 1;
4754 out_attr->i = in_vec;
4755 }
4756 else if (out_vec < in_vec)
4757 _bfd_error_handler
4758 /* xgettext:c-format */
4759 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4760 obfd, ibfd);
4761 else if (out_vec > in_vec)
4762 _bfd_error_handler
4763 /* xgettext:c-format */
4764 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4765 ibfd, obfd);
4766 }
4767
4768 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4769 and merge non-conflicting ones. */
4770 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4771 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4772 if (in_attr->i != out_attr->i)
4773 {
4774 int in_struct = in_attr->i & 3;
4775 int out_struct = out_attr->i & 3;
4776
4777 if (in_struct == 0 || in_struct == 3)
4778 ;
4779 else if (out_struct == 0)
4780 {
4781 out_attr->type = 1;
4782 out_attr->i = in_struct;
4783 }
4784 else if (out_struct < in_struct)
4785 _bfd_error_handler
4786 /* xgettext:c-format */
4787 (_("Warning: %B uses r3/r4 for small structure returns, "
4788 "%B uses memory"), obfd, ibfd);
4789 else if (out_struct > in_struct)
4790 _bfd_error_handler
4791 /* xgettext:c-format */
4792 (_("Warning: %B uses r3/r4 for small structure returns, "
4793 "%B uses memory"), ibfd, obfd);
4794 }
4795
4796 /* Merge Tag_compatibility attributes and any common GNU ones. */
4797 _bfd_elf_merge_object_attributes (ibfd, info);
4798
4799 return TRUE;
4800 }
4801
4802 /* Merge backend specific data from an object file to the output
4803 object file when linking. */
4804
4805 static bfd_boolean
4806 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4807 {
4808 bfd *obfd = info->output_bfd;
4809 flagword old_flags;
4810 flagword new_flags;
4811 bfd_boolean error;
4812
4813 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4814 return TRUE;
4815
4816 /* Check if we have the same endianness. */
4817 if (! _bfd_generic_verify_endian_match (ibfd, info))
4818 return FALSE;
4819
4820 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4821 return FALSE;
4822
4823 new_flags = elf_elfheader (ibfd)->e_flags;
4824 old_flags = elf_elfheader (obfd)->e_flags;
4825 if (!elf_flags_init (obfd))
4826 {
4827 /* First call, no flags set. */
4828 elf_flags_init (obfd) = TRUE;
4829 elf_elfheader (obfd)->e_flags = new_flags;
4830 }
4831
4832 /* Compatible flags are ok. */
4833 else if (new_flags == old_flags)
4834 ;
4835
4836 /* Incompatible flags. */
4837 else
4838 {
4839 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4840 to be linked with either. */
4841 error = FALSE;
4842 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4843 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4844 {
4845 error = TRUE;
4846 _bfd_error_handler
4847 (_("%B: compiled with -mrelocatable and linked with "
4848 "modules compiled normally"), ibfd);
4849 }
4850 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4851 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4852 {
4853 error = TRUE;
4854 _bfd_error_handler
4855 (_("%B: compiled normally and linked with "
4856 "modules compiled with -mrelocatable"), ibfd);
4857 }
4858
4859 /* The output is -mrelocatable-lib iff both the input files are. */
4860 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4861 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4862
4863 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4864 but each input file is either -mrelocatable or -mrelocatable-lib. */
4865 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4866 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4867 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4868 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4869
4870 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4871 any module uses it. */
4872 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4873
4874 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4875 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4876
4877 /* Warn about any other mismatches. */
4878 if (new_flags != old_flags)
4879 {
4880 error = TRUE;
4881 _bfd_error_handler
4882 /* xgettext:c-format */
4883 (_("%B: uses different e_flags (0x%lx) fields "
4884 "than previous modules (0x%lx)"),
4885 ibfd, (long) new_flags, (long) old_flags);
4886 }
4887
4888 if (error)
4889 {
4890 bfd_set_error (bfd_error_bad_value);
4891 return FALSE;
4892 }
4893 }
4894
4895 return TRUE;
4896 }
4897
4898 static void
4899 ppc_elf_vle_split16 (bfd *input_bfd,
4900 asection *input_section,
4901 unsigned long offset,
4902 bfd_byte *loc,
4903 bfd_vma value,
4904 split16_format_type split16_format,
4905 bfd_boolean fixup)
4906 {
4907 unsigned int insn, opcode, top5;
4908
4909 insn = bfd_get_32 (input_bfd, loc);
4910 opcode = insn & 0xf300f800;
4911 if (opcode == E_OR2I_INSN
4912 || opcode == E_AND2I_DOT_INSN
4913 || opcode == E_OR2IS_INSN
4914 || opcode == E_LIS_INSN
4915 || opcode == E_AND2IS_DOT_INSN)
4916 {
4917 if (split16_format != split16a_type)
4918 {
4919 if (fixup)
4920 split16_format = split16a_type;
4921 else
4922 _bfd_error_handler
4923 /* xgettext:c-format */
4924 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4925 input_bfd, input_section, offset, opcode);
4926 }
4927 }
4928 else if (opcode == E_ADD2I_DOT_INSN
4929 || opcode == E_ADD2IS_INSN
4930 || opcode == E_CMP16I_INSN
4931 || opcode == E_MULL2I_INSN
4932 || opcode == E_CMPL16I_INSN
4933 || opcode == E_CMPH16I_INSN
4934 || opcode == E_CMPHL16I_INSN)
4935 {
4936 if (split16_format != split16d_type)
4937 {
4938 if (fixup)
4939 split16_format = split16d_type;
4940 else
4941 _bfd_error_handler
4942 /* xgettext:c-format */
4943 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4944 input_bfd, input_section, offset, opcode);
4945 }
4946 }
4947 top5 = value & 0xf800;
4948 top5 = top5 << (split16_format == split16a_type ? 5 : 9);
4949 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x1f007ff);
4950 insn |= top5;
4951 insn |= value & 0x7ff;
4952 bfd_put_32 (input_bfd, insn, loc);
4953 }
4954 \f
4955 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4956 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4957 int
4958 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4959 struct bfd_link_info *info)
4960 {
4961 struct ppc_elf_link_hash_table *htab;
4962 flagword flags;
4963
4964 htab = ppc_elf_hash_table (info);
4965
4966 if (htab->plt_type == PLT_UNSET)
4967 {
4968 struct elf_link_hash_entry *h;
4969
4970 if (htab->params->plt_style == PLT_OLD)
4971 htab->plt_type = PLT_OLD;
4972 else if (bfd_link_pic (info)
4973 && htab->elf.dynamic_sections_created
4974 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4975 FALSE, FALSE, TRUE)) != NULL
4976 && (h->type == STT_FUNC
4977 || h->needs_plt)
4978 && h->ref_regular
4979 && !(SYMBOL_CALLS_LOCAL (info, h)
4980 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4981 && h->root.type == bfd_link_hash_undefweak)))
4982 {
4983 /* Profiling of shared libs (and pies) is not supported with
4984 secure plt, because ppc32 does profiling before a
4985 function prologue and a secure plt pic call stubs needs
4986 r30 to be set up. */
4987 htab->plt_type = PLT_OLD;
4988 }
4989 else
4990 {
4991 bfd *ibfd;
4992 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4993
4994 /* Look through the reloc flags left by ppc_elf_check_relocs.
4995 Use the old style bss plt if a file makes plt calls
4996 without using the new relocs, and if ld isn't given
4997 --secure-plt and we never see REL16 relocs. */
4998 if (plt_type == PLT_UNSET)
4999 plt_type = PLT_OLD;
5000 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5001 if (is_ppc_elf (ibfd))
5002 {
5003 if (ppc_elf_tdata (ibfd)->has_rel16)
5004 plt_type = PLT_NEW;
5005 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5006 {
5007 plt_type = PLT_OLD;
5008 htab->old_bfd = ibfd;
5009 break;
5010 }
5011 }
5012 htab->plt_type = plt_type;
5013 }
5014 }
5015 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5016 {
5017 if (htab->old_bfd != NULL)
5018 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5019 htab->old_bfd);
5020 else
5021 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5022 }
5023
5024 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5025
5026 if (htab->plt_type == PLT_NEW)
5027 {
5028 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5029 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5030
5031 /* The new PLT is a loaded section. */
5032 if (htab->elf.splt != NULL
5033 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5034 return -1;
5035
5036 /* The new GOT is not executable. */
5037 if (htab->elf.sgot != NULL
5038 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5039 return -1;
5040 }
5041 else
5042 {
5043 /* Stop an unused .glink section from affecting .text alignment. */
5044 if (htab->glink != NULL
5045 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5046 return -1;
5047 }
5048 return htab->plt_type == PLT_NEW;
5049 }
5050 \f
5051 /* Return the section that should be marked against GC for a given
5052 relocation. */
5053
5054 static asection *
5055 ppc_elf_gc_mark_hook (asection *sec,
5056 struct bfd_link_info *info,
5057 Elf_Internal_Rela *rel,
5058 struct elf_link_hash_entry *h,
5059 Elf_Internal_Sym *sym)
5060 {
5061 if (h != NULL)
5062 switch (ELF32_R_TYPE (rel->r_info))
5063 {
5064 case R_PPC_GNU_VTINHERIT:
5065 case R_PPC_GNU_VTENTRY:
5066 return NULL;
5067 }
5068
5069 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5070 }
5071
5072 /* Update the got, plt and dynamic reloc reference counts for the
5073 section being removed. */
5074
5075 static bfd_boolean
5076 ppc_elf_gc_sweep_hook (bfd *abfd,
5077 struct bfd_link_info *info,
5078 asection *sec,
5079 const Elf_Internal_Rela *relocs)
5080 {
5081 struct ppc_elf_link_hash_table *htab;
5082 Elf_Internal_Shdr *symtab_hdr;
5083 struct elf_link_hash_entry **sym_hashes;
5084 bfd_signed_vma *local_got_refcounts;
5085 const Elf_Internal_Rela *rel, *relend;
5086 asection *got2;
5087
5088 if (bfd_link_relocatable (info))
5089 return TRUE;
5090
5091 if ((sec->flags & SEC_ALLOC) == 0)
5092 return TRUE;
5093
5094 elf_section_data (sec)->local_dynrel = NULL;
5095
5096 htab = ppc_elf_hash_table (info);
5097 symtab_hdr = &elf_symtab_hdr (abfd);
5098 sym_hashes = elf_sym_hashes (abfd);
5099 local_got_refcounts = elf_local_got_refcounts (abfd);
5100 got2 = bfd_get_section_by_name (abfd, ".got2");
5101
5102 relend = relocs + sec->reloc_count;
5103 for (rel = relocs; rel < relend; rel++)
5104 {
5105 unsigned long r_symndx;
5106 enum elf_ppc_reloc_type r_type;
5107 struct elf_link_hash_entry *h = NULL;
5108
5109 r_symndx = ELF32_R_SYM (rel->r_info);
5110 if (r_symndx >= symtab_hdr->sh_info)
5111 {
5112 struct elf_dyn_relocs **pp, *p;
5113 struct ppc_elf_link_hash_entry *eh;
5114
5115 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5116 while (h->root.type == bfd_link_hash_indirect
5117 || h->root.type == bfd_link_hash_warning)
5118 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5119 eh = (struct ppc_elf_link_hash_entry *) h;
5120
5121 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5122 if (p->sec == sec)
5123 {
5124 /* Everything must go for SEC. */
5125 *pp = p->next;
5126 break;
5127 }
5128 }
5129
5130 r_type = ELF32_R_TYPE (rel->r_info);
5131 if (!htab->is_vxworks
5132 && h == NULL
5133 && local_got_refcounts != NULL
5134 && (!bfd_link_pic (info)
5135 || is_branch_reloc (r_type)))
5136 {
5137 struct plt_entry **local_plt = (struct plt_entry **)
5138 (local_got_refcounts + symtab_hdr->sh_info);
5139 char *local_got_tls_masks = (char *)
5140 (local_plt + symtab_hdr->sh_info);
5141 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5142 {
5143 struct plt_entry **ifunc = local_plt + r_symndx;
5144 bfd_vma addend = 0;
5145 struct plt_entry *ent;
5146
5147 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5148 addend = rel->r_addend;
5149 ent = find_plt_ent (ifunc, got2, addend);
5150 if (ent->plt.refcount > 0)
5151 ent->plt.refcount -= 1;
5152 continue;
5153 }
5154 }
5155
5156 switch (r_type)
5157 {
5158 case R_PPC_GOT_TLSLD16:
5159 case R_PPC_GOT_TLSLD16_LO:
5160 case R_PPC_GOT_TLSLD16_HI:
5161 case R_PPC_GOT_TLSLD16_HA:
5162 case R_PPC_GOT_TLSGD16:
5163 case R_PPC_GOT_TLSGD16_LO:
5164 case R_PPC_GOT_TLSGD16_HI:
5165 case R_PPC_GOT_TLSGD16_HA:
5166 case R_PPC_GOT_TPREL16:
5167 case R_PPC_GOT_TPREL16_LO:
5168 case R_PPC_GOT_TPREL16_HI:
5169 case R_PPC_GOT_TPREL16_HA:
5170 case R_PPC_GOT_DTPREL16:
5171 case R_PPC_GOT_DTPREL16_LO:
5172 case R_PPC_GOT_DTPREL16_HI:
5173 case R_PPC_GOT_DTPREL16_HA:
5174 case R_PPC_GOT16:
5175 case R_PPC_GOT16_LO:
5176 case R_PPC_GOT16_HI:
5177 case R_PPC_GOT16_HA:
5178 if (h != NULL)
5179 {
5180 if (h->got.refcount > 0)
5181 h->got.refcount--;
5182 if (!bfd_link_pic (info))
5183 {
5184 struct plt_entry *ent;
5185
5186 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5187 if (ent != NULL && ent->plt.refcount > 0)
5188 ent->plt.refcount -= 1;
5189 }
5190 }
5191 else if (local_got_refcounts != NULL)
5192 {
5193 if (local_got_refcounts[r_symndx] > 0)
5194 local_got_refcounts[r_symndx]--;
5195 }
5196 break;
5197
5198 case R_PPC_REL24:
5199 case R_PPC_REL14:
5200 case R_PPC_REL14_BRTAKEN:
5201 case R_PPC_REL14_BRNTAKEN:
5202 case R_PPC_REL32:
5203 if (h == NULL || h == htab->elf.hgot)
5204 break;
5205 /* Fall through. */
5206
5207 case R_PPC_ADDR32:
5208 case R_PPC_ADDR24:
5209 case R_PPC_ADDR16:
5210 case R_PPC_ADDR16_LO:
5211 case R_PPC_ADDR16_HI:
5212 case R_PPC_ADDR16_HA:
5213 case R_PPC_ADDR14:
5214 case R_PPC_ADDR14_BRTAKEN:
5215 case R_PPC_ADDR14_BRNTAKEN:
5216 case R_PPC_UADDR32:
5217 case R_PPC_UADDR16:
5218 if (bfd_link_pic (info))
5219 break;
5220 /* Fall through. */
5221
5222 case R_PPC_PLT32:
5223 case R_PPC_PLTREL24:
5224 case R_PPC_PLTREL32:
5225 case R_PPC_PLT16_LO:
5226 case R_PPC_PLT16_HI:
5227 case R_PPC_PLT16_HA:
5228 if (h != NULL)
5229 {
5230 bfd_vma addend = 0;
5231 struct plt_entry *ent;
5232
5233 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5234 addend = rel->r_addend;
5235 ent = find_plt_ent (&h->plt.plist, got2, addend);
5236 if (ent != NULL && ent->plt.refcount > 0)
5237 ent->plt.refcount -= 1;
5238 }
5239 break;
5240
5241 default:
5242 break;
5243 }
5244 }
5245 return TRUE;
5246 }
5247 \f
5248 /* Set plt output section type, htab->tls_get_addr, and call the
5249 generic ELF tls_setup function. */
5250
5251 asection *
5252 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5253 {
5254 struct ppc_elf_link_hash_table *htab;
5255
5256 htab = ppc_elf_hash_table (info);
5257 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5258 FALSE, FALSE, TRUE);
5259 if (htab->plt_type != PLT_NEW)
5260 htab->params->no_tls_get_addr_opt = TRUE;
5261
5262 if (!htab->params->no_tls_get_addr_opt)
5263 {
5264 struct elf_link_hash_entry *opt, *tga;
5265 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5266 FALSE, FALSE, TRUE);
5267 if (opt != NULL
5268 && (opt->root.type == bfd_link_hash_defined
5269 || opt->root.type == bfd_link_hash_defweak))
5270 {
5271 /* If glibc supports an optimized __tls_get_addr call stub,
5272 signalled by the presence of __tls_get_addr_opt, and we'll
5273 be calling __tls_get_addr via a plt call stub, then
5274 make __tls_get_addr point to __tls_get_addr_opt. */
5275 tga = htab->tls_get_addr;
5276 if (htab->elf.dynamic_sections_created
5277 && tga != NULL
5278 && (tga->type == STT_FUNC
5279 || tga->needs_plt)
5280 && !(SYMBOL_CALLS_LOCAL (info, tga)
5281 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5282 && tga->root.type == bfd_link_hash_undefweak)))
5283 {
5284 struct plt_entry *ent;
5285 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5286 if (ent->plt.refcount > 0)
5287 break;
5288 if (ent != NULL)
5289 {
5290 tga->root.type = bfd_link_hash_indirect;
5291 tga->root.u.i.link = &opt->root;
5292 ppc_elf_copy_indirect_symbol (info, opt, tga);
5293 opt->forced_local = 0;
5294 if (opt->dynindx != -1)
5295 {
5296 /* Use __tls_get_addr_opt in dynamic relocations. */
5297 opt->dynindx = -1;
5298 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5299 opt->dynstr_index);
5300 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5301 return FALSE;
5302 }
5303 htab->tls_get_addr = opt;
5304 }
5305 }
5306 }
5307 else
5308 htab->params->no_tls_get_addr_opt = TRUE;
5309 }
5310 if (htab->plt_type == PLT_NEW
5311 && htab->elf.splt != NULL
5312 && htab->elf.splt->output_section != NULL)
5313 {
5314 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5315 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5316 }
5317
5318 return _bfd_elf_tls_setup (obfd, info);
5319 }
5320
5321 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5322 HASH. */
5323
5324 static bfd_boolean
5325 branch_reloc_hash_match (const bfd *ibfd,
5326 const Elf_Internal_Rela *rel,
5327 const struct elf_link_hash_entry *hash)
5328 {
5329 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5330 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5331 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5332
5333 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5334 {
5335 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5336 struct elf_link_hash_entry *h;
5337
5338 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5339 while (h->root.type == bfd_link_hash_indirect
5340 || h->root.type == bfd_link_hash_warning)
5341 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5342 if (h == hash)
5343 return TRUE;
5344 }
5345 return FALSE;
5346 }
5347
5348 /* Run through all the TLS relocs looking for optimization
5349 opportunities. */
5350
5351 bfd_boolean
5352 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5353 struct bfd_link_info *info)
5354 {
5355 bfd *ibfd;
5356 asection *sec;
5357 struct ppc_elf_link_hash_table *htab;
5358 int pass;
5359
5360 if (!bfd_link_executable (info))
5361 return TRUE;
5362
5363 htab = ppc_elf_hash_table (info);
5364 if (htab == NULL)
5365 return FALSE;
5366
5367 /* Make two passes through the relocs. First time check that tls
5368 relocs involved in setting up a tls_get_addr call are indeed
5369 followed by such a call. If they are not, don't do any tls
5370 optimization. On the second pass twiddle tls_mask flags to
5371 notify relocate_section that optimization can be done, and
5372 adjust got and plt refcounts. */
5373 for (pass = 0; pass < 2; ++pass)
5374 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5375 {
5376 Elf_Internal_Sym *locsyms = NULL;
5377 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5378 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5379
5380 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5381 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5382 {
5383 Elf_Internal_Rela *relstart, *rel, *relend;
5384 int expecting_tls_get_addr = 0;
5385
5386 /* Read the relocations. */
5387 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5388 info->keep_memory);
5389 if (relstart == NULL)
5390 return FALSE;
5391
5392 relend = relstart + sec->reloc_count;
5393 for (rel = relstart; rel < relend; rel++)
5394 {
5395 enum elf_ppc_reloc_type r_type;
5396 unsigned long r_symndx;
5397 struct elf_link_hash_entry *h = NULL;
5398 char *tls_mask;
5399 char tls_set, tls_clear;
5400 bfd_boolean is_local;
5401 bfd_signed_vma *got_count;
5402
5403 r_symndx = ELF32_R_SYM (rel->r_info);
5404 if (r_symndx >= symtab_hdr->sh_info)
5405 {
5406 struct elf_link_hash_entry **sym_hashes;
5407
5408 sym_hashes = elf_sym_hashes (ibfd);
5409 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5410 while (h->root.type == bfd_link_hash_indirect
5411 || h->root.type == bfd_link_hash_warning)
5412 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5413 }
5414
5415 is_local = FALSE;
5416 if (h == NULL
5417 || !h->def_dynamic)
5418 is_local = TRUE;
5419
5420 r_type = ELF32_R_TYPE (rel->r_info);
5421 /* If this section has old-style __tls_get_addr calls
5422 without marker relocs, then check that each
5423 __tls_get_addr call reloc is preceded by a reloc
5424 that conceivably belongs to the __tls_get_addr arg
5425 setup insn. If we don't find matching arg setup
5426 relocs, don't do any tls optimization. */
5427 if (pass == 0
5428 && sec->has_tls_get_addr_call
5429 && h != NULL
5430 && h == htab->tls_get_addr
5431 && !expecting_tls_get_addr
5432 && is_branch_reloc (r_type))
5433 {
5434 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5435 "TLS optimization disabled\n",
5436 ibfd, sec, rel->r_offset);
5437 if (elf_section_data (sec)->relocs != relstart)
5438 free (relstart);
5439 return TRUE;
5440 }
5441
5442 expecting_tls_get_addr = 0;
5443 switch (r_type)
5444 {
5445 case R_PPC_GOT_TLSLD16:
5446 case R_PPC_GOT_TLSLD16_LO:
5447 expecting_tls_get_addr = 1;
5448 /* Fall through. */
5449
5450 case R_PPC_GOT_TLSLD16_HI:
5451 case R_PPC_GOT_TLSLD16_HA:
5452 /* These relocs should never be against a symbol
5453 defined in a shared lib. Leave them alone if
5454 that turns out to be the case. */
5455 if (!is_local)
5456 continue;
5457
5458 /* LD -> LE */
5459 tls_set = 0;
5460 tls_clear = TLS_LD;
5461 break;
5462
5463 case R_PPC_GOT_TLSGD16:
5464 case R_PPC_GOT_TLSGD16_LO:
5465 expecting_tls_get_addr = 1;
5466 /* Fall through. */
5467
5468 case R_PPC_GOT_TLSGD16_HI:
5469 case R_PPC_GOT_TLSGD16_HA:
5470 if (is_local)
5471 /* GD -> LE */
5472 tls_set = 0;
5473 else
5474 /* GD -> IE */
5475 tls_set = TLS_TLS | TLS_TPRELGD;
5476 tls_clear = TLS_GD;
5477 break;
5478
5479 case R_PPC_GOT_TPREL16:
5480 case R_PPC_GOT_TPREL16_LO:
5481 case R_PPC_GOT_TPREL16_HI:
5482 case R_PPC_GOT_TPREL16_HA:
5483 if (is_local)
5484 {
5485 /* IE -> LE */
5486 tls_set = 0;
5487 tls_clear = TLS_TPREL;
5488 break;
5489 }
5490 else
5491 continue;
5492
5493 case R_PPC_TLSGD:
5494 case R_PPC_TLSLD:
5495 expecting_tls_get_addr = 2;
5496 tls_set = 0;
5497 tls_clear = 0;
5498 break;
5499
5500 default:
5501 continue;
5502 }
5503
5504 if (pass == 0)
5505 {
5506 if (!expecting_tls_get_addr
5507 || (expecting_tls_get_addr == 1
5508 && !sec->has_tls_get_addr_call))
5509 continue;
5510
5511 if (rel + 1 < relend
5512 && branch_reloc_hash_match (ibfd, rel + 1,
5513 htab->tls_get_addr))
5514 continue;
5515
5516 /* Uh oh, we didn't find the expected call. We
5517 could just mark this symbol to exclude it
5518 from tls optimization but it's safer to skip
5519 the entire optimization. */
5520 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5521 "TLS optimization disabled\n"),
5522 ibfd, sec, rel->r_offset);
5523 if (elf_section_data (sec)->relocs != relstart)
5524 free (relstart);
5525 return TRUE;
5526 }
5527
5528 if (expecting_tls_get_addr)
5529 {
5530 struct plt_entry *ent;
5531 bfd_vma addend = 0;
5532
5533 if (bfd_link_pic (info)
5534 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5535 addend = rel[1].r_addend;
5536 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5537 got2, addend);
5538 if (ent != NULL && ent->plt.refcount > 0)
5539 ent->plt.refcount -= 1;
5540
5541 if (expecting_tls_get_addr == 2)
5542 continue;
5543 }
5544
5545 if (h != NULL)
5546 {
5547 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5548 got_count = &h->got.refcount;
5549 }
5550 else
5551 {
5552 bfd_signed_vma *lgot_refs;
5553 struct plt_entry **local_plt;
5554 char *lgot_masks;
5555
5556 if (locsyms == NULL)
5557 {
5558 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5559 if (locsyms == NULL)
5560 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5561 symtab_hdr->sh_info,
5562 0, NULL, NULL, NULL);
5563 if (locsyms == NULL)
5564 {
5565 if (elf_section_data (sec)->relocs != relstart)
5566 free (relstart);
5567 return FALSE;
5568 }
5569 }
5570 lgot_refs = elf_local_got_refcounts (ibfd);
5571 if (lgot_refs == NULL)
5572 abort ();
5573 local_plt = (struct plt_entry **)
5574 (lgot_refs + symtab_hdr->sh_info);
5575 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5576 tls_mask = &lgot_masks[r_symndx];
5577 got_count = &lgot_refs[r_symndx];
5578 }
5579
5580 if (tls_set == 0)
5581 {
5582 /* We managed to get rid of a got entry. */
5583 if (*got_count > 0)
5584 *got_count -= 1;
5585 }
5586
5587 *tls_mask |= tls_set;
5588 *tls_mask &= ~tls_clear;
5589 }
5590
5591 if (elf_section_data (sec)->relocs != relstart)
5592 free (relstart);
5593 }
5594
5595 if (locsyms != NULL
5596 && (symtab_hdr->contents != (unsigned char *) locsyms))
5597 {
5598 if (!info->keep_memory)
5599 free (locsyms);
5600 else
5601 symtab_hdr->contents = (unsigned char *) locsyms;
5602 }
5603 }
5604 return TRUE;
5605 }
5606 \f
5607 /* Return true if we have dynamic relocs that apply to read-only sections. */
5608
5609 static bfd_boolean
5610 readonly_dynrelocs (struct elf_link_hash_entry *h)
5611 {
5612 struct elf_dyn_relocs *p;
5613
5614 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5615 {
5616 asection *s = p->sec->output_section;
5617
5618 if (s != NULL
5619 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5620 == (SEC_READONLY | SEC_ALLOC)))
5621 return TRUE;
5622 }
5623 return FALSE;
5624 }
5625
5626 /* Adjust a symbol defined by a dynamic object and referenced by a
5627 regular object. The current definition is in some section of the
5628 dynamic object, but we're not including those sections. We have to
5629 change the definition to something the rest of the link can
5630 understand. */
5631
5632 static bfd_boolean
5633 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5634 struct elf_link_hash_entry *h)
5635 {
5636 struct ppc_elf_link_hash_table *htab;
5637 asection *s;
5638
5639 #ifdef DEBUG
5640 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5641 h->root.root.string);
5642 #endif
5643
5644 /* Make sure we know what is going on here. */
5645 htab = ppc_elf_hash_table (info);
5646 BFD_ASSERT (htab->elf.dynobj != NULL
5647 && (h->needs_plt
5648 || h->type == STT_GNU_IFUNC
5649 || h->u.weakdef != NULL
5650 || (h->def_dynamic
5651 && h->ref_regular
5652 && !h->def_regular)));
5653
5654 /* Deal with function syms. */
5655 if (h->type == STT_FUNC
5656 || h->type == STT_GNU_IFUNC
5657 || h->needs_plt)
5658 {
5659 /* Clear procedure linkage table information for any symbol that
5660 won't need a .plt entry. */
5661 struct plt_entry *ent;
5662 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5663 if (ent->plt.refcount > 0)
5664 break;
5665 if (ent == NULL
5666 || (h->type != STT_GNU_IFUNC
5667 && (SYMBOL_CALLS_LOCAL (info, h)
5668 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5669 && h->root.type == bfd_link_hash_undefweak))))
5670 {
5671 /* A PLT entry is not required/allowed when:
5672
5673 1. We are not using ld.so; because then the PLT entry
5674 can't be set up, so we can't use one. In this case,
5675 ppc_elf_adjust_dynamic_symbol won't even be called.
5676
5677 2. GC has rendered the entry unused.
5678
5679 3. We know for certain that a call to this symbol
5680 will go to this object, or will remain undefined. */
5681 h->plt.plist = NULL;
5682 h->needs_plt = 0;
5683 h->pointer_equality_needed = 0;
5684 }
5685 else
5686 {
5687 /* Taking a function's address in a read/write section
5688 doesn't require us to define the function symbol in the
5689 executable on a plt call stub. A dynamic reloc can
5690 be used instead. */
5691 if (h->pointer_equality_needed
5692 && h->type != STT_GNU_IFUNC
5693 && !htab->is_vxworks
5694 && !ppc_elf_hash_entry (h)->has_sda_refs
5695 && !readonly_dynrelocs (h))
5696 {
5697 h->pointer_equality_needed = 0;
5698 h->non_got_ref = 0;
5699 }
5700
5701 /* After adjust_dynamic_symbol, non_got_ref set in the
5702 non-shared case means that we have allocated space in
5703 .dynbss for the symbol and thus dyn_relocs for this
5704 symbol should be discarded.
5705 If we get here we know we are making a PLT entry for this
5706 symbol, and in an executable we'd normally resolve
5707 relocations against this symbol to the PLT entry. Allow
5708 dynamic relocs if the reference is weak, and the dynamic
5709 relocs will not cause text relocation. */
5710 else if (!h->ref_regular_nonweak
5711 && h->non_got_ref
5712 && h->type != STT_GNU_IFUNC
5713 && !htab->is_vxworks
5714 && !ppc_elf_hash_entry (h)->has_sda_refs
5715 && !readonly_dynrelocs (h))
5716 h->non_got_ref = 0;
5717 }
5718 h->protected_def = 0;
5719 return TRUE;
5720 }
5721 else
5722 h->plt.plist = NULL;
5723
5724 /* If this is a weak symbol, and there is a real definition, the
5725 processor independent code will have arranged for us to see the
5726 real definition first, and we can just use the same value. */
5727 if (h->u.weakdef != NULL)
5728 {
5729 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5730 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5731 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5732 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5733 if (ELIMINATE_COPY_RELOCS)
5734 h->non_got_ref = h->u.weakdef->non_got_ref;
5735 return TRUE;
5736 }
5737
5738 /* This is a reference to a symbol defined by a dynamic object which
5739 is not a function. */
5740
5741 /* If we are creating a shared library, we must presume that the
5742 only references to the symbol are via the global offset table.
5743 For such cases we need not do anything here; the relocations will
5744 be handled correctly by relocate_section. */
5745 if (bfd_link_pic (info))
5746 {
5747 h->protected_def = 0;
5748 return TRUE;
5749 }
5750
5751 /* If there are no references to this symbol that do not use the
5752 GOT, we don't need to generate a copy reloc. */
5753 if (!h->non_got_ref)
5754 {
5755 h->protected_def = 0;
5756 return TRUE;
5757 }
5758
5759 /* Protected variables do not work with .dynbss. The copy in
5760 .dynbss won't be used by the shared library with the protected
5761 definition for the variable. Editing to PIC, or text relocations
5762 are preferable to an incorrect program. */
5763 if (h->protected_def)
5764 {
5765 if (ELIMINATE_COPY_RELOCS
5766 && ppc_elf_hash_entry (h)->has_addr16_ha
5767 && ppc_elf_hash_entry (h)->has_addr16_lo
5768 && htab->params->pic_fixup == 0
5769 && info->disable_target_specific_optimizations <= 1)
5770 htab->params->pic_fixup = 1;
5771 h->non_got_ref = 0;
5772 return TRUE;
5773 }
5774
5775 /* If -z nocopyreloc was given, we won't generate them either. */
5776 if (info->nocopyreloc)
5777 {
5778 h->non_got_ref = 0;
5779 return TRUE;
5780 }
5781
5782 /* If we didn't find any dynamic relocs in read-only sections, then
5783 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5784 We can't do this if there are any small data relocations. This
5785 doesn't work on VxWorks, where we can not have dynamic
5786 relocations (other than copy and jump slot relocations) in an
5787 executable. */
5788 if (ELIMINATE_COPY_RELOCS
5789 && !ppc_elf_hash_entry (h)->has_sda_refs
5790 && !htab->is_vxworks
5791 && !h->def_regular
5792 && !readonly_dynrelocs (h))
5793 {
5794 h->non_got_ref = 0;
5795 return TRUE;
5796 }
5797
5798 /* We must allocate the symbol in our .dynbss section, which will
5799 become part of the .bss section of the executable. There will be
5800 an entry for this symbol in the .dynsym section. The dynamic
5801 object will contain position independent code, so all references
5802 from the dynamic object to this symbol will go through the global
5803 offset table. The dynamic linker will use the .dynsym entry to
5804 determine the address it must put in the global offset table, so
5805 both the dynamic object and the regular object will refer to the
5806 same memory location for the variable.
5807
5808 Of course, if the symbol is referenced using SDAREL relocs, we
5809 must instead allocate it in .sbss. */
5810
5811 if (ppc_elf_hash_entry (h)->has_sda_refs)
5812 s = htab->dynsbss;
5813 else
5814 s = htab->dynbss;
5815 BFD_ASSERT (s != NULL);
5816
5817 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5818 copy the initial value out of the dynamic object and into the
5819 runtime process image. We need to remember the offset into the
5820 .rela.bss section we are going to use. */
5821 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5822 {
5823 asection *srel;
5824
5825 if (ppc_elf_hash_entry (h)->has_sda_refs)
5826 srel = htab->relsbss;
5827 else
5828 srel = htab->relbss;
5829 BFD_ASSERT (srel != NULL);
5830 srel->size += sizeof (Elf32_External_Rela);
5831 h->needs_copy = 1;
5832 }
5833
5834 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5835 }
5836 \f
5837 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5838 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5839 specifying the addend on the plt relocation. For -fpic code, the sym
5840 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5841 xxxxxxxx.got2.plt_pic32.<callee>. */
5842
5843 static bfd_boolean
5844 add_stub_sym (struct plt_entry *ent,
5845 struct elf_link_hash_entry *h,
5846 struct bfd_link_info *info)
5847 {
5848 struct elf_link_hash_entry *sh;
5849 size_t len1, len2, len3;
5850 char *name;
5851 const char *stub;
5852 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5853
5854 if (bfd_link_pic (info))
5855 stub = ".plt_pic32.";
5856 else
5857 stub = ".plt_call32.";
5858
5859 len1 = strlen (h->root.root.string);
5860 len2 = strlen (stub);
5861 len3 = 0;
5862 if (ent->sec)
5863 len3 = strlen (ent->sec->name);
5864 name = bfd_malloc (len1 + len2 + len3 + 9);
5865 if (name == NULL)
5866 return FALSE;
5867 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5868 if (ent->sec)
5869 memcpy (name + 8, ent->sec->name, len3);
5870 memcpy (name + 8 + len3, stub, len2);
5871 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5872 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5873 if (sh == NULL)
5874 return FALSE;
5875 if (sh->root.type == bfd_link_hash_new)
5876 {
5877 sh->root.type = bfd_link_hash_defined;
5878 sh->root.u.def.section = htab->glink;
5879 sh->root.u.def.value = ent->glink_offset;
5880 sh->ref_regular = 1;
5881 sh->def_regular = 1;
5882 sh->ref_regular_nonweak = 1;
5883 sh->forced_local = 1;
5884 sh->non_elf = 0;
5885 sh->root.linker_def = 1;
5886 }
5887 return TRUE;
5888 }
5889
5890 /* Allocate NEED contiguous space in .got, and return the offset.
5891 Handles allocation of the got header when crossing 32k. */
5892
5893 static bfd_vma
5894 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5895 {
5896 bfd_vma where;
5897 unsigned int max_before_header;
5898
5899 if (htab->plt_type == PLT_VXWORKS)
5900 {
5901 where = htab->elf.sgot->size;
5902 htab->elf.sgot->size += need;
5903 }
5904 else
5905 {
5906 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5907 if (need <= htab->got_gap)
5908 {
5909 where = max_before_header - htab->got_gap;
5910 htab->got_gap -= need;
5911 }
5912 else
5913 {
5914 if (htab->elf.sgot->size + need > max_before_header
5915 && htab->elf.sgot->size <= max_before_header)
5916 {
5917 htab->got_gap = max_before_header - htab->elf.sgot->size;
5918 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5919 }
5920 where = htab->elf.sgot->size;
5921 htab->elf.sgot->size += need;
5922 }
5923 }
5924 return where;
5925 }
5926
5927 /* Allocate space in associated reloc sections for dynamic relocs. */
5928
5929 static bfd_boolean
5930 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5931 {
5932 struct bfd_link_info *info = inf;
5933 struct ppc_elf_link_hash_entry *eh;
5934 struct ppc_elf_link_hash_table *htab;
5935 struct elf_dyn_relocs *p;
5936
5937 if (h->root.type == bfd_link_hash_indirect)
5938 return TRUE;
5939
5940 htab = ppc_elf_hash_table (info);
5941 if (htab->elf.dynamic_sections_created
5942 || h->type == STT_GNU_IFUNC)
5943 {
5944 struct plt_entry *ent;
5945 bfd_boolean doneone = FALSE;
5946 bfd_vma plt_offset = 0, glink_offset = 0;
5947 bfd_boolean dyn;
5948
5949 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5950 if (ent->plt.refcount > 0)
5951 {
5952 /* Make sure this symbol is output as a dynamic symbol. */
5953 if (h->dynindx == -1
5954 && !h->forced_local
5955 && !h->def_regular
5956 && htab->elf.dynamic_sections_created)
5957 {
5958 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5959 return FALSE;
5960 }
5961
5962 dyn = htab->elf.dynamic_sections_created;
5963 if (bfd_link_pic (info)
5964 || h->type == STT_GNU_IFUNC
5965 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5966 {
5967 asection *s = htab->elf.splt;
5968 if (!dyn || h->dynindx == -1)
5969 s = htab->elf.iplt;
5970
5971 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5972 {
5973 if (!doneone)
5974 {
5975 plt_offset = s->size;
5976 s->size += 4;
5977 }
5978 ent->plt.offset = plt_offset;
5979
5980 s = htab->glink;
5981 if (!doneone || bfd_link_pic (info))
5982 {
5983 glink_offset = s->size;
5984 s->size += GLINK_ENTRY_SIZE;
5985 if (h == htab->tls_get_addr
5986 && !htab->params->no_tls_get_addr_opt)
5987 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5988 }
5989 if (!doneone
5990 && !bfd_link_pic (info)
5991 && h->def_dynamic
5992 && !h->def_regular)
5993 {
5994 h->root.u.def.section = s;
5995 h->root.u.def.value = glink_offset;
5996 }
5997 ent->glink_offset = glink_offset;
5998
5999 if (htab->params->emit_stub_syms
6000 && !add_stub_sym (ent, h, info))
6001 return FALSE;
6002 }
6003 else
6004 {
6005 if (!doneone)
6006 {
6007 /* If this is the first .plt entry, make room
6008 for the special first entry. */
6009 if (s->size == 0)
6010 s->size += htab->plt_initial_entry_size;
6011
6012 /* The PowerPC PLT is actually composed of two
6013 parts, the first part is 2 words (for a load
6014 and a jump), and then there is a remaining
6015 word available at the end. */
6016 plt_offset = (htab->plt_initial_entry_size
6017 + (htab->plt_slot_size
6018 * ((s->size
6019 - htab->plt_initial_entry_size)
6020 / htab->plt_entry_size)));
6021
6022 /* If this symbol is not defined in a regular
6023 file, and we are not generating a shared
6024 library, then set the symbol to this location
6025 in the .plt. This is to avoid text
6026 relocations, and is required to make
6027 function pointers compare as equal between
6028 the normal executable and the shared library. */
6029 if (! bfd_link_pic (info)
6030 && h->def_dynamic
6031 && !h->def_regular)
6032 {
6033 h->root.u.def.section = s;
6034 h->root.u.def.value = plt_offset;
6035 }
6036
6037 /* Make room for this entry. */
6038 s->size += htab->plt_entry_size;
6039 /* After the 8192nd entry, room for two entries
6040 is allocated. */
6041 if (htab->plt_type == PLT_OLD
6042 && (s->size - htab->plt_initial_entry_size)
6043 / htab->plt_entry_size
6044 > PLT_NUM_SINGLE_ENTRIES)
6045 s->size += htab->plt_entry_size;
6046 }
6047 ent->plt.offset = plt_offset;
6048 }
6049
6050 /* We also need to make an entry in the .rela.plt section. */
6051 if (!doneone)
6052 {
6053 if (!htab->elf.dynamic_sections_created
6054 || h->dynindx == -1)
6055 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6056 else
6057 {
6058 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6059
6060 if (htab->plt_type == PLT_VXWORKS)
6061 {
6062 /* Allocate space for the unloaded relocations. */
6063 if (!bfd_link_pic (info)
6064 && htab->elf.dynamic_sections_created)
6065 {
6066 if (ent->plt.offset
6067 == (bfd_vma) htab->plt_initial_entry_size)
6068 {
6069 htab->srelplt2->size
6070 += (sizeof (Elf32_External_Rela)
6071 * VXWORKS_PLTRESOLVE_RELOCS);
6072 }
6073
6074 htab->srelplt2->size
6075 += (sizeof (Elf32_External_Rela)
6076 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6077 }
6078
6079 /* Every PLT entry has an associated GOT entry in
6080 .got.plt. */
6081 htab->elf.sgotplt->size += 4;
6082 }
6083 }
6084 doneone = TRUE;
6085 }
6086 }
6087 else
6088 ent->plt.offset = (bfd_vma) -1;
6089 }
6090 else
6091 ent->plt.offset = (bfd_vma) -1;
6092
6093 if (!doneone)
6094 {
6095 h->plt.plist = NULL;
6096 h->needs_plt = 0;
6097 }
6098 }
6099 else
6100 {
6101 h->plt.plist = NULL;
6102 h->needs_plt = 0;
6103 }
6104
6105 eh = (struct ppc_elf_link_hash_entry *) h;
6106 if (eh->elf.got.refcount > 0
6107 || (ELIMINATE_COPY_RELOCS
6108 && !eh->elf.def_regular
6109 && eh->elf.protected_def
6110 && eh->has_addr16_ha
6111 && eh->has_addr16_lo
6112 && htab->params->pic_fixup > 0))
6113 {
6114 bfd_boolean dyn;
6115 unsigned int need;
6116
6117 /* Make sure this symbol is output as a dynamic symbol. */
6118 if (eh->elf.dynindx == -1
6119 && !eh->elf.forced_local
6120 && eh->elf.type != STT_GNU_IFUNC
6121 && htab->elf.dynamic_sections_created)
6122 {
6123 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6124 return FALSE;
6125 }
6126
6127 need = 0;
6128 if ((eh->tls_mask & TLS_TLS) != 0)
6129 {
6130 if ((eh->tls_mask & TLS_LD) != 0)
6131 {
6132 if (!eh->elf.def_dynamic)
6133 /* We'll just use htab->tlsld_got.offset. This should
6134 always be the case. It's a little odd if we have
6135 a local dynamic reloc against a non-local symbol. */
6136 htab->tlsld_got.refcount += 1;
6137 else
6138 need += 8;
6139 }
6140 if ((eh->tls_mask & TLS_GD) != 0)
6141 need += 8;
6142 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6143 need += 4;
6144 if ((eh->tls_mask & TLS_DTPREL) != 0)
6145 need += 4;
6146 }
6147 else
6148 need += 4;
6149 if (need == 0)
6150 eh->elf.got.offset = (bfd_vma) -1;
6151 else
6152 {
6153 eh->elf.got.offset = allocate_got (htab, need);
6154 dyn = htab->elf.dynamic_sections_created;
6155 if ((bfd_link_pic (info)
6156 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6157 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6158 || eh->elf.root.type != bfd_link_hash_undefweak))
6159 {
6160 asection *rsec = htab->elf.srelgot;
6161
6162 if (eh->elf.type == STT_GNU_IFUNC)
6163 rsec = htab->elf.irelplt;
6164 /* All the entries we allocated need relocs.
6165 Except LD only needs one. */
6166 if ((eh->tls_mask & TLS_LD) != 0
6167 && eh->elf.def_dynamic)
6168 need -= 4;
6169 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6170 }
6171 }
6172 }
6173 else
6174 eh->elf.got.offset = (bfd_vma) -1;
6175
6176 if (eh->dyn_relocs == NULL
6177 || !htab->elf.dynamic_sections_created)
6178 return TRUE;
6179
6180 /* In the shared -Bsymbolic case, discard space allocated for
6181 dynamic pc-relative relocs against symbols which turn out to be
6182 defined in regular objects. For the normal shared case, discard
6183 space for relocs that have become local due to symbol visibility
6184 changes. */
6185
6186 if (bfd_link_pic (info))
6187 {
6188 /* Relocs that use pc_count are those that appear on a call insn,
6189 or certain REL relocs (see must_be_dyn_reloc) that can be
6190 generated via assembly. We want calls to protected symbols to
6191 resolve directly to the function rather than going via the plt.
6192 If people want function pointer comparisons to work as expected
6193 then they should avoid writing weird assembly. */
6194 if (SYMBOL_CALLS_LOCAL (info, h))
6195 {
6196 struct elf_dyn_relocs **pp;
6197
6198 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6199 {
6200 p->count -= p->pc_count;
6201 p->pc_count = 0;
6202 if (p->count == 0)
6203 *pp = p->next;
6204 else
6205 pp = &p->next;
6206 }
6207 }
6208
6209 if (htab->is_vxworks)
6210 {
6211 struct elf_dyn_relocs **pp;
6212
6213 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6214 {
6215 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6216 *pp = p->next;
6217 else
6218 pp = &p->next;
6219 }
6220 }
6221
6222 /* Discard relocs on undefined symbols that must be local. */
6223 if (eh->dyn_relocs != NULL
6224 && h->root.type == bfd_link_hash_undefined
6225 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6226 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6227 eh->dyn_relocs = NULL;
6228
6229 /* Also discard relocs on undefined weak syms with non-default
6230 visibility. */
6231 if (eh->dyn_relocs != NULL
6232 && h->root.type == bfd_link_hash_undefweak)
6233 {
6234 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6235 eh->dyn_relocs = NULL;
6236
6237 /* Make sure undefined weak symbols are output as a dynamic
6238 symbol in PIEs. */
6239 else if (h->dynindx == -1
6240 && !h->forced_local
6241 && !h->def_regular)
6242 {
6243 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6244 return FALSE;
6245 }
6246 }
6247 }
6248 else if (ELIMINATE_COPY_RELOCS)
6249 {
6250 /* For the non-shared case, discard space for relocs against
6251 symbols which turn out to need copy relocs or are not
6252 dynamic. */
6253
6254 if (!h->non_got_ref
6255 && !h->def_regular
6256 && !(h->protected_def
6257 && eh->has_addr16_ha
6258 && eh->has_addr16_lo
6259 && htab->params->pic_fixup > 0))
6260 {
6261 /* Make sure this symbol is output as a dynamic symbol.
6262 Undefined weak syms won't yet be marked as dynamic. */
6263 if (h->dynindx == -1
6264 && !h->forced_local)
6265 {
6266 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6267 return FALSE;
6268 }
6269
6270 /* If that succeeded, we know we'll be keeping all the
6271 relocs. */
6272 if (h->dynindx != -1)
6273 goto keep;
6274 }
6275
6276 eh->dyn_relocs = NULL;
6277
6278 keep: ;
6279 }
6280
6281 /* Finally, allocate space. */
6282 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6283 {
6284 asection *sreloc = elf_section_data (p->sec)->sreloc;
6285 if (eh->elf.type == STT_GNU_IFUNC)
6286 sreloc = htab->elf.irelplt;
6287 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6288 }
6289
6290 return TRUE;
6291 }
6292
6293 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6294 read-only sections. */
6295
6296 static bfd_boolean
6297 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6298 {
6299 if (h->root.type == bfd_link_hash_indirect)
6300 return TRUE;
6301
6302 if (readonly_dynrelocs (h))
6303 {
6304 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6305
6306 /* Not an error, just cut short the traversal. */
6307 return FALSE;
6308 }
6309 return TRUE;
6310 }
6311
6312 static const unsigned char glink_eh_frame_cie[] =
6313 {
6314 0, 0, 0, 16, /* length. */
6315 0, 0, 0, 0, /* id. */
6316 1, /* CIE version. */
6317 'z', 'R', 0, /* Augmentation string. */
6318 4, /* Code alignment. */
6319 0x7c, /* Data alignment. */
6320 65, /* RA reg. */
6321 1, /* Augmentation size. */
6322 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6323 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6324 };
6325
6326 /* Set the sizes of the dynamic sections. */
6327
6328 static bfd_boolean
6329 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6330 struct bfd_link_info *info)
6331 {
6332 struct ppc_elf_link_hash_table *htab;
6333 asection *s;
6334 bfd_boolean relocs;
6335 bfd *ibfd;
6336
6337 #ifdef DEBUG
6338 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6339 #endif
6340
6341 htab = ppc_elf_hash_table (info);
6342 BFD_ASSERT (htab->elf.dynobj != NULL);
6343
6344 if (elf_hash_table (info)->dynamic_sections_created)
6345 {
6346 /* Set the contents of the .interp section to the interpreter. */
6347 if (bfd_link_executable (info) && !info->nointerp)
6348 {
6349 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6350 BFD_ASSERT (s != NULL);
6351 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6352 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6353 }
6354 }
6355
6356 if (htab->plt_type == PLT_OLD)
6357 htab->got_header_size = 16;
6358 else if (htab->plt_type == PLT_NEW)
6359 htab->got_header_size = 12;
6360
6361 /* Set up .got offsets for local syms, and space for local dynamic
6362 relocs. */
6363 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6364 {
6365 bfd_signed_vma *local_got;
6366 bfd_signed_vma *end_local_got;
6367 struct plt_entry **local_plt;
6368 struct plt_entry **end_local_plt;
6369 char *lgot_masks;
6370 bfd_size_type locsymcount;
6371 Elf_Internal_Shdr *symtab_hdr;
6372
6373 if (!is_ppc_elf (ibfd))
6374 continue;
6375
6376 for (s = ibfd->sections; s != NULL; s = s->next)
6377 {
6378 struct ppc_dyn_relocs *p;
6379
6380 for (p = ((struct ppc_dyn_relocs *)
6381 elf_section_data (s)->local_dynrel);
6382 p != NULL;
6383 p = p->next)
6384 {
6385 if (!bfd_is_abs_section (p->sec)
6386 && bfd_is_abs_section (p->sec->output_section))
6387 {
6388 /* Input section has been discarded, either because
6389 it is a copy of a linkonce section or due to
6390 linker script /DISCARD/, so we'll be discarding
6391 the relocs too. */
6392 }
6393 else if (htab->is_vxworks
6394 && strcmp (p->sec->output_section->name,
6395 ".tls_vars") == 0)
6396 {
6397 /* Relocations in vxworks .tls_vars sections are
6398 handled specially by the loader. */
6399 }
6400 else if (p->count != 0)
6401 {
6402 asection *sreloc = elf_section_data (p->sec)->sreloc;
6403 if (p->ifunc)
6404 sreloc = htab->elf.irelplt;
6405 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6406 if ((p->sec->output_section->flags
6407 & (SEC_READONLY | SEC_ALLOC))
6408 == (SEC_READONLY | SEC_ALLOC))
6409 info->flags |= DF_TEXTREL;
6410 }
6411 }
6412 }
6413
6414 local_got = elf_local_got_refcounts (ibfd);
6415 if (!local_got)
6416 continue;
6417
6418 symtab_hdr = &elf_symtab_hdr (ibfd);
6419 locsymcount = symtab_hdr->sh_info;
6420 end_local_got = local_got + locsymcount;
6421 local_plt = (struct plt_entry **) end_local_got;
6422 end_local_plt = local_plt + locsymcount;
6423 lgot_masks = (char *) end_local_plt;
6424
6425 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6426 if (*local_got > 0)
6427 {
6428 unsigned int need = 0;
6429 if ((*lgot_masks & TLS_TLS) != 0)
6430 {
6431 if ((*lgot_masks & TLS_GD) != 0)
6432 need += 8;
6433 if ((*lgot_masks & TLS_LD) != 0)
6434 htab->tlsld_got.refcount += 1;
6435 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6436 need += 4;
6437 if ((*lgot_masks & TLS_DTPREL) != 0)
6438 need += 4;
6439 }
6440 else
6441 need += 4;
6442 if (need == 0)
6443 *local_got = (bfd_vma) -1;
6444 else
6445 {
6446 *local_got = allocate_got (htab, need);
6447 if (bfd_link_pic (info))
6448 {
6449 asection *srel = htab->elf.srelgot;
6450 if ((*lgot_masks & PLT_IFUNC) != 0)
6451 srel = htab->elf.irelplt;
6452 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6453 }
6454 }
6455 }
6456 else
6457 *local_got = (bfd_vma) -1;
6458
6459 if (htab->is_vxworks)
6460 continue;
6461
6462 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6463 for (; local_plt < end_local_plt; ++local_plt)
6464 {
6465 struct plt_entry *ent;
6466 bfd_boolean doneone = FALSE;
6467 bfd_vma plt_offset = 0, glink_offset = 0;
6468
6469 for (ent = *local_plt; ent != NULL; ent = ent->next)
6470 if (ent->plt.refcount > 0)
6471 {
6472 s = htab->elf.iplt;
6473
6474 if (!doneone)
6475 {
6476 plt_offset = s->size;
6477 s->size += 4;
6478 }
6479 ent->plt.offset = plt_offset;
6480
6481 s = htab->glink;
6482 if (!doneone || bfd_link_pic (info))
6483 {
6484 glink_offset = s->size;
6485 s->size += GLINK_ENTRY_SIZE;
6486 }
6487 ent->glink_offset = glink_offset;
6488
6489 if (!doneone)
6490 {
6491 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6492 doneone = TRUE;
6493 }
6494 }
6495 else
6496 ent->plt.offset = (bfd_vma) -1;
6497 }
6498 }
6499
6500 /* Allocate space for global sym dynamic relocs. */
6501 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6502
6503 if (htab->tlsld_got.refcount > 0)
6504 {
6505 htab->tlsld_got.offset = allocate_got (htab, 8);
6506 if (bfd_link_pic (info))
6507 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6508 }
6509 else
6510 htab->tlsld_got.offset = (bfd_vma) -1;
6511
6512 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6513 {
6514 unsigned int g_o_t = 32768;
6515
6516 /* If we haven't allocated the header, do so now. When we get here,
6517 for old plt/got the got size will be 0 to 32764 (not allocated),
6518 or 32780 to 65536 (header allocated). For new plt/got, the
6519 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6520 if (htab->elf.sgot->size <= 32768)
6521 {
6522 g_o_t = htab->elf.sgot->size;
6523 if (htab->plt_type == PLT_OLD)
6524 g_o_t += 4;
6525 htab->elf.sgot->size += htab->got_header_size;
6526 }
6527
6528 htab->elf.hgot->root.u.def.value = g_o_t;
6529 }
6530 if (bfd_link_pic (info))
6531 {
6532 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6533
6534 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6535 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6536 }
6537 if (info->emitrelocations)
6538 {
6539 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6540
6541 if (sda != NULL && sda->ref_regular)
6542 sda->root.u.def.section->flags |= SEC_KEEP;
6543 sda = htab->sdata[1].sym;
6544 if (sda != NULL && sda->ref_regular)
6545 sda->root.u.def.section->flags |= SEC_KEEP;
6546 }
6547
6548 if (htab->glink != NULL
6549 && htab->glink->size != 0
6550 && htab->elf.dynamic_sections_created)
6551 {
6552 htab->glink_pltresolve = htab->glink->size;
6553 /* Space for the branch table. ??? We don't need entries for
6554 non-dynamic symbols in this table. This case can arise with
6555 static ifuncs or forced local ifuncs. */
6556 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6557 /* Pad out to align the start of PLTresolve. */
6558 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6559 ? 63 : 15);
6560 htab->glink->size += GLINK_PLTRESOLVE;
6561
6562 if (htab->params->emit_stub_syms)
6563 {
6564 struct elf_link_hash_entry *sh;
6565 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6566 TRUE, FALSE, FALSE);
6567 if (sh == NULL)
6568 return FALSE;
6569 if (sh->root.type == bfd_link_hash_new)
6570 {
6571 sh->root.type = bfd_link_hash_defined;
6572 sh->root.u.def.section = htab->glink;
6573 sh->root.u.def.value = htab->glink_pltresolve;
6574 sh->ref_regular = 1;
6575 sh->def_regular = 1;
6576 sh->ref_regular_nonweak = 1;
6577 sh->forced_local = 1;
6578 sh->non_elf = 0;
6579 sh->root.linker_def = 1;
6580 }
6581 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6582 TRUE, FALSE, FALSE);
6583 if (sh == NULL)
6584 return FALSE;
6585 if (sh->root.type == bfd_link_hash_new)
6586 {
6587 sh->root.type = bfd_link_hash_defined;
6588 sh->root.u.def.section = htab->glink;
6589 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6590 sh->ref_regular = 1;
6591 sh->def_regular = 1;
6592 sh->ref_regular_nonweak = 1;
6593 sh->forced_local = 1;
6594 sh->non_elf = 0;
6595 sh->root.linker_def = 1;
6596 }
6597 }
6598 }
6599
6600 if (htab->glink != NULL
6601 && htab->glink->size != 0
6602 && htab->glink_eh_frame != NULL
6603 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6604 && _bfd_elf_eh_frame_present (info))
6605 {
6606 s = htab->glink_eh_frame;
6607 s->size = sizeof (glink_eh_frame_cie) + 20;
6608 if (bfd_link_pic (info))
6609 {
6610 s->size += 4;
6611 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6612 s->size += 4;
6613 }
6614 }
6615
6616 /* We've now determined the sizes of the various dynamic sections.
6617 Allocate memory for them. */
6618 relocs = FALSE;
6619 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6620 {
6621 bfd_boolean strip_section = TRUE;
6622
6623 if ((s->flags & SEC_LINKER_CREATED) == 0)
6624 continue;
6625
6626 if (s == htab->elf.splt
6627 || s == htab->elf.sgot)
6628 {
6629 /* We'd like to strip these sections if they aren't needed, but if
6630 we've exported dynamic symbols from them we must leave them.
6631 It's too late to tell BFD to get rid of the symbols. */
6632 if (htab->elf.hplt != NULL)
6633 strip_section = FALSE;
6634 /* Strip this section if we don't need it; see the
6635 comment below. */
6636 }
6637 else if (s == htab->elf.iplt
6638 || s == htab->glink
6639 || s == htab->glink_eh_frame
6640 || s == htab->elf.sgotplt
6641 || s == htab->sbss
6642 || s == htab->dynbss
6643 || s == htab->dynsbss)
6644 {
6645 /* Strip these too. */
6646 }
6647 else if (s == htab->sdata[0].section
6648 || s == htab->sdata[1].section)
6649 {
6650 strip_section = (s->flags & SEC_KEEP) == 0;
6651 }
6652 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6653 ".rela"))
6654 {
6655 if (s->size != 0)
6656 {
6657 /* Remember whether there are any relocation sections. */
6658 relocs = TRUE;
6659
6660 /* We use the reloc_count field as a counter if we need
6661 to copy relocs into the output file. */
6662 s->reloc_count = 0;
6663 }
6664 }
6665 else
6666 {
6667 /* It's not one of our sections, so don't allocate space. */
6668 continue;
6669 }
6670
6671 if (s->size == 0 && strip_section)
6672 {
6673 /* If we don't need this section, strip it from the
6674 output file. This is mostly to handle .rela.bss and
6675 .rela.plt. We must create both sections in
6676 create_dynamic_sections, because they must be created
6677 before the linker maps input sections to output
6678 sections. The linker does that before
6679 adjust_dynamic_symbol is called, and it is that
6680 function which decides whether anything needs to go
6681 into these sections. */
6682 s->flags |= SEC_EXCLUDE;
6683 continue;
6684 }
6685
6686 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6687 continue;
6688
6689 /* Allocate memory for the section contents. */
6690 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6691 if (s->contents == NULL)
6692 return FALSE;
6693 }
6694
6695 if (htab->elf.dynamic_sections_created)
6696 {
6697 /* Add some entries to the .dynamic section. We fill in the
6698 values later, in ppc_elf_finish_dynamic_sections, but we
6699 must add the entries now so that we get the correct size for
6700 the .dynamic section. The DT_DEBUG entry is filled in by the
6701 dynamic linker and used by the debugger. */
6702 #define add_dynamic_entry(TAG, VAL) \
6703 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6704
6705 if (bfd_link_executable (info))
6706 {
6707 if (!add_dynamic_entry (DT_DEBUG, 0))
6708 return FALSE;
6709 }
6710
6711 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6712 {
6713 if (!add_dynamic_entry (DT_PLTGOT, 0)
6714 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6715 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6716 || !add_dynamic_entry (DT_JMPREL, 0))
6717 return FALSE;
6718 }
6719
6720 if (htab->plt_type == PLT_NEW
6721 && htab->glink != NULL
6722 && htab->glink->size != 0)
6723 {
6724 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6725 return FALSE;
6726 if (!htab->params->no_tls_get_addr_opt
6727 && htab->tls_get_addr != NULL
6728 && htab->tls_get_addr->plt.plist != NULL
6729 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6730 return FALSE;
6731 }
6732
6733 if (relocs)
6734 {
6735 if (!add_dynamic_entry (DT_RELA, 0)
6736 || !add_dynamic_entry (DT_RELASZ, 0)
6737 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6738 return FALSE;
6739 }
6740
6741 /* If any dynamic relocs apply to a read-only section, then we
6742 need a DT_TEXTREL entry. */
6743 if ((info->flags & DF_TEXTREL) == 0)
6744 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6745 info);
6746
6747 if ((info->flags & DF_TEXTREL) != 0)
6748 {
6749 if (!add_dynamic_entry (DT_TEXTREL, 0))
6750 return FALSE;
6751 }
6752 if (htab->is_vxworks
6753 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6754 return FALSE;
6755 }
6756 #undef add_dynamic_entry
6757
6758 if (htab->glink_eh_frame != NULL
6759 && htab->glink_eh_frame->contents != NULL)
6760 {
6761 unsigned char *p = htab->glink_eh_frame->contents;
6762 bfd_vma val;
6763
6764 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6765 /* CIE length (rewrite in case little-endian). */
6766 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6767 p += sizeof (glink_eh_frame_cie);
6768 /* FDE length. */
6769 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6770 bfd_put_32 (htab->elf.dynobj, val, p);
6771 p += 4;
6772 /* CIE pointer. */
6773 val = p - htab->glink_eh_frame->contents;
6774 bfd_put_32 (htab->elf.dynobj, val, p);
6775 p += 4;
6776 /* Offset to .glink. Set later. */
6777 p += 4;
6778 /* .glink size. */
6779 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6780 p += 4;
6781 /* Augmentation. */
6782 p += 1;
6783
6784 if (bfd_link_pic (info)
6785 && htab->elf.dynamic_sections_created)
6786 {
6787 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6788 if (adv < 64)
6789 *p++ = DW_CFA_advance_loc + adv;
6790 else if (adv < 256)
6791 {
6792 *p++ = DW_CFA_advance_loc1;
6793 *p++ = adv;
6794 }
6795 else if (adv < 65536)
6796 {
6797 *p++ = DW_CFA_advance_loc2;
6798 bfd_put_16 (htab->elf.dynobj, adv, p);
6799 p += 2;
6800 }
6801 else
6802 {
6803 *p++ = DW_CFA_advance_loc4;
6804 bfd_put_32 (htab->elf.dynobj, adv, p);
6805 p += 4;
6806 }
6807 *p++ = DW_CFA_register;
6808 *p++ = 65;
6809 p++;
6810 *p++ = DW_CFA_advance_loc + 4;
6811 *p++ = DW_CFA_restore_extended;
6812 *p++ = 65;
6813 }
6814 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6815 == htab->glink_eh_frame->size);
6816 }
6817
6818 return TRUE;
6819 }
6820
6821 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6822 if it looks like nothing is using them. */
6823
6824 static void
6825 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6826 {
6827 struct elf_link_hash_entry *sda = lsect->sym;
6828
6829 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6830 {
6831 asection *s;
6832
6833 s = bfd_get_section_by_name (output_bfd, lsect->name);
6834 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6835 {
6836 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6837 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6838 {
6839 sda->def_regular = 0;
6840 /* This is somewhat magic. See elf_link_output_extsym. */
6841 sda->ref_dynamic = 1;
6842 sda->forced_local = 0;
6843 }
6844 }
6845 }
6846 }
6847
6848 void
6849 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6850 {
6851 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6852
6853 if (htab != NULL)
6854 {
6855 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6856 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6857 }
6858 }
6859
6860
6861 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6862
6863 static bfd_boolean
6864 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6865 {
6866 if (h->plt.plist != NULL
6867 && !h->def_regular
6868 && (!h->pointer_equality_needed
6869 || !h->ref_regular_nonweak))
6870 return FALSE;
6871
6872 return _bfd_elf_hash_symbol (h);
6873 }
6874 \f
6875 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6876
6877 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6878 used for some functions that are allowed to break the ABI). */
6879 static const int shared_stub_entry[] =
6880 {
6881 0x7c0802a6, /* mflr 0 */
6882 0x429f0005, /* bcl 20, 31, .Lxxx */
6883 0x7d8802a6, /* mflr 12 */
6884 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6885 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6886 0x7c0803a6, /* mtlr 0 */
6887 0x7d8903a6, /* mtctr 12 */
6888 0x4e800420, /* bctr */
6889 };
6890
6891 static const int stub_entry[] =
6892 {
6893 0x3d800000, /* lis 12,xxx@ha */
6894 0x398c0000, /* addi 12,12,xxx@l */
6895 0x7d8903a6, /* mtctr 12 */
6896 0x4e800420, /* bctr */
6897 };
6898
6899 struct ppc_elf_relax_info
6900 {
6901 unsigned int workaround_size;
6902 unsigned int picfixup_size;
6903 };
6904
6905 /* This function implements long branch trampolines, and the ppc476
6906 icache bug workaround. Any section needing trampolines or patch
6907 space for the workaround has its size extended so that we can
6908 add trampolines at the end of the section. */
6909
6910 static bfd_boolean
6911 ppc_elf_relax_section (bfd *abfd,
6912 asection *isec,
6913 struct bfd_link_info *link_info,
6914 bfd_boolean *again)
6915 {
6916 struct one_branch_fixup
6917 {
6918 struct one_branch_fixup *next;
6919 asection *tsec;
6920 /* Final link, can use the symbol offset. For a
6921 relocatable link we use the symbol's index. */
6922 bfd_vma toff;
6923 bfd_vma trampoff;
6924 };
6925
6926 Elf_Internal_Shdr *symtab_hdr;
6927 bfd_byte *contents = NULL;
6928 Elf_Internal_Sym *isymbuf = NULL;
6929 Elf_Internal_Rela *internal_relocs = NULL;
6930 Elf_Internal_Rela *irel, *irelend = NULL;
6931 struct one_branch_fixup *branch_fixups = NULL;
6932 struct ppc_elf_relax_info *relax_info = NULL;
6933 unsigned changes = 0;
6934 bfd_boolean workaround_change;
6935 struct ppc_elf_link_hash_table *htab;
6936 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6937 asection *got2;
6938 bfd_boolean maybe_pasted;
6939
6940 *again = FALSE;
6941
6942 /* No need to do anything with non-alloc or non-code sections. */
6943 if ((isec->flags & SEC_ALLOC) == 0
6944 || (isec->flags & SEC_CODE) == 0
6945 || (isec->flags & SEC_LINKER_CREATED) != 0
6946 || isec->size < 4)
6947 return TRUE;
6948
6949 /* We cannot represent the required PIC relocs in the output, so don't
6950 do anything. The linker doesn't support mixing -shared and -r
6951 anyway. */
6952 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6953 return TRUE;
6954
6955 htab = ppc_elf_hash_table (link_info);
6956 if (htab == NULL)
6957 return TRUE;
6958
6959 isec->size = (isec->size + 3) & -4;
6960 if (isec->rawsize == 0)
6961 isec->rawsize = isec->size;
6962 trampbase = isec->size;
6963
6964 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6965 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6966 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6967
6968 if (htab->params->ppc476_workaround
6969 || htab->params->pic_fixup > 0)
6970 {
6971 if (elf_section_data (isec)->sec_info == NULL)
6972 {
6973 elf_section_data (isec)->sec_info
6974 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6975 if (elf_section_data (isec)->sec_info == NULL)
6976 return FALSE;
6977 }
6978 relax_info = elf_section_data (isec)->sec_info;
6979 trampbase -= relax_info->workaround_size;
6980 }
6981
6982 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6983 || strcmp (isec->output_section->name, ".fini") == 0);
6984 /* Space for a branch around any trampolines. */
6985 trampoff = trampbase;
6986 if (maybe_pasted && trampbase == isec->rawsize)
6987 trampoff += 4;
6988
6989 symtab_hdr = &elf_symtab_hdr (abfd);
6990 picfixup_size = 0;
6991 if (htab->params->branch_trampolines
6992 || htab->params->pic_fixup > 0)
6993 {
6994 /* Get a copy of the native relocations. */
6995 if (isec->reloc_count != 0)
6996 {
6997 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6998 link_info->keep_memory);
6999 if (internal_relocs == NULL)
7000 goto error_return;
7001 }
7002
7003 got2 = bfd_get_section_by_name (abfd, ".got2");
7004
7005 irelend = internal_relocs + isec->reloc_count;
7006 for (irel = internal_relocs; irel < irelend; irel++)
7007 {
7008 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7009 bfd_vma toff, roff;
7010 asection *tsec;
7011 struct one_branch_fixup *f;
7012 size_t insn_offset = 0;
7013 bfd_vma max_branch_offset = 0, val;
7014 bfd_byte *hit_addr;
7015 unsigned long t0;
7016 struct elf_link_hash_entry *h;
7017 struct plt_entry **plist;
7018 unsigned char sym_type;
7019
7020 switch (r_type)
7021 {
7022 case R_PPC_REL24:
7023 case R_PPC_LOCAL24PC:
7024 case R_PPC_PLTREL24:
7025 max_branch_offset = 1 << 25;
7026 break;
7027
7028 case R_PPC_REL14:
7029 case R_PPC_REL14_BRTAKEN:
7030 case R_PPC_REL14_BRNTAKEN:
7031 max_branch_offset = 1 << 15;
7032 break;
7033
7034 case R_PPC_ADDR16_HA:
7035 if (htab->params->pic_fixup > 0)
7036 break;
7037 continue;
7038
7039 default:
7040 continue;
7041 }
7042
7043 /* Get the value of the symbol referred to by the reloc. */
7044 h = NULL;
7045 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7046 {
7047 /* A local symbol. */
7048 Elf_Internal_Sym *isym;
7049
7050 /* Read this BFD's local symbols. */
7051 if (isymbuf == NULL)
7052 {
7053 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7054 if (isymbuf == NULL)
7055 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7056 symtab_hdr->sh_info, 0,
7057 NULL, NULL, NULL);
7058 if (isymbuf == 0)
7059 goto error_return;
7060 }
7061 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7062 if (isym->st_shndx == SHN_UNDEF)
7063 tsec = bfd_und_section_ptr;
7064 else if (isym->st_shndx == SHN_ABS)
7065 tsec = bfd_abs_section_ptr;
7066 else if (isym->st_shndx == SHN_COMMON)
7067 tsec = bfd_com_section_ptr;
7068 else
7069 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7070
7071 toff = isym->st_value;
7072 sym_type = ELF_ST_TYPE (isym->st_info);
7073 }
7074 else
7075 {
7076 /* Global symbol handling. */
7077 unsigned long indx;
7078
7079 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7080 h = elf_sym_hashes (abfd)[indx];
7081
7082 while (h->root.type == bfd_link_hash_indirect
7083 || h->root.type == bfd_link_hash_warning)
7084 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7085
7086 if (h->root.type == bfd_link_hash_defined
7087 || h->root.type == bfd_link_hash_defweak)
7088 {
7089 tsec = h->root.u.def.section;
7090 toff = h->root.u.def.value;
7091 }
7092 else if (h->root.type == bfd_link_hash_undefined
7093 || h->root.type == bfd_link_hash_undefweak)
7094 {
7095 tsec = bfd_und_section_ptr;
7096 toff = bfd_link_relocatable (link_info) ? indx : 0;
7097 }
7098 else
7099 continue;
7100
7101 /* If this branch is to __tls_get_addr then we may later
7102 optimise away the call. We won't be needing a long-
7103 branch stub in that case. */
7104 if (bfd_link_executable (link_info)
7105 && h == htab->tls_get_addr
7106 && irel != internal_relocs)
7107 {
7108 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7109 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7110 unsigned int tls_mask = 0;
7111
7112 /* The previous reloc should be one of R_PPC_TLSGD or
7113 R_PPC_TLSLD, or for older object files, a reloc
7114 on the __tls_get_addr arg setup insn. Get tls
7115 mask bits from the symbol on that reloc. */
7116 if (t_symndx < symtab_hdr->sh_info)
7117 {
7118 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7119
7120 if (local_got_offsets != NULL)
7121 {
7122 struct plt_entry **local_plt = (struct plt_entry **)
7123 (local_got_offsets + symtab_hdr->sh_info);
7124 char *lgot_masks = (char *)
7125 (local_plt + symtab_hdr->sh_info);
7126 tls_mask = lgot_masks[t_symndx];
7127 }
7128 }
7129 else
7130 {
7131 struct elf_link_hash_entry *th
7132 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7133
7134 while (th->root.type == bfd_link_hash_indirect
7135 || th->root.type == bfd_link_hash_warning)
7136 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7137
7138 tls_mask
7139 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7140 }
7141
7142 /* The mask bits tell us if the call will be
7143 optimised away. */
7144 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7145 && (t_rtype == R_PPC_TLSGD
7146 || t_rtype == R_PPC_GOT_TLSGD16
7147 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7148 continue;
7149 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7150 && (t_rtype == R_PPC_TLSLD
7151 || t_rtype == R_PPC_GOT_TLSLD16
7152 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7153 continue;
7154 }
7155
7156 sym_type = h->type;
7157 }
7158
7159 if (r_type == R_PPC_ADDR16_HA)
7160 {
7161 if (h != NULL
7162 && !h->def_regular
7163 && h->protected_def
7164 && ppc_elf_hash_entry (h)->has_addr16_ha
7165 && ppc_elf_hash_entry (h)->has_addr16_lo)
7166 picfixup_size += 12;
7167 continue;
7168 }
7169
7170 /* The condition here under which we call find_plt_ent must
7171 match that in relocate_section. If we call find_plt_ent here
7172 but not in relocate_section, or vice versa, then the branch
7173 destination used here may be incorrect. */
7174 plist = NULL;
7175 if (h != NULL)
7176 {
7177 /* We know is_branch_reloc (r_type) is true. */
7178 if (h->type == STT_GNU_IFUNC
7179 || r_type == R_PPC_PLTREL24)
7180 plist = &h->plt.plist;
7181 }
7182 else if (sym_type == STT_GNU_IFUNC
7183 && elf_local_got_offsets (abfd) != NULL)
7184 {
7185 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7186 struct plt_entry **local_plt = (struct plt_entry **)
7187 (local_got_offsets + symtab_hdr->sh_info);
7188 plist = local_plt + ELF32_R_SYM (irel->r_info);
7189 }
7190 if (plist != NULL)
7191 {
7192 bfd_vma addend = 0;
7193 struct plt_entry *ent;
7194
7195 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7196 addend = irel->r_addend;
7197 ent = find_plt_ent (plist, got2, addend);
7198 if (ent != NULL)
7199 {
7200 if (htab->plt_type == PLT_NEW
7201 || h == NULL
7202 || !htab->elf.dynamic_sections_created
7203 || h->dynindx == -1)
7204 {
7205 tsec = htab->glink;
7206 toff = ent->glink_offset;
7207 }
7208 else
7209 {
7210 tsec = htab->elf.splt;
7211 toff = ent->plt.offset;
7212 }
7213 }
7214 }
7215
7216 /* If the branch and target are in the same section, you have
7217 no hope of adding stubs. We'll error out later should the
7218 branch overflow. */
7219 if (tsec == isec)
7220 continue;
7221
7222 /* There probably isn't any reason to handle symbols in
7223 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7224 attribute for a code section, and we are only looking at
7225 branches. However, implement it correctly here as a
7226 reference for other target relax_section functions. */
7227 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7228 {
7229 /* At this stage in linking, no SEC_MERGE symbol has been
7230 adjusted, so all references to such symbols need to be
7231 passed through _bfd_merged_section_offset. (Later, in
7232 relocate_section, all SEC_MERGE symbols *except* for
7233 section symbols have been adjusted.)
7234
7235 gas may reduce relocations against symbols in SEC_MERGE
7236 sections to a relocation against the section symbol when
7237 the original addend was zero. When the reloc is against
7238 a section symbol we should include the addend in the
7239 offset passed to _bfd_merged_section_offset, since the
7240 location of interest is the original symbol. On the
7241 other hand, an access to "sym+addend" where "sym" is not
7242 a section symbol should not include the addend; Such an
7243 access is presumed to be an offset from "sym"; The
7244 location of interest is just "sym". */
7245 if (sym_type == STT_SECTION)
7246 toff += irel->r_addend;
7247
7248 toff
7249 = _bfd_merged_section_offset (abfd, &tsec,
7250 elf_section_data (tsec)->sec_info,
7251 toff);
7252
7253 if (sym_type != STT_SECTION)
7254 toff += irel->r_addend;
7255 }
7256 /* PLTREL24 addends are special. */
7257 else if (r_type != R_PPC_PLTREL24)
7258 toff += irel->r_addend;
7259
7260 /* Attempted -shared link of non-pic code loses. */
7261 if ((!bfd_link_relocatable (link_info)
7262 && tsec == bfd_und_section_ptr)
7263 || tsec->output_section == NULL
7264 || (tsec->owner != NULL
7265 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7266 continue;
7267
7268 roff = irel->r_offset;
7269
7270 /* If the branch is in range, no need to do anything. */
7271 if (tsec != bfd_und_section_ptr
7272 && (!bfd_link_relocatable (link_info)
7273 /* A relocatable link may have sections moved during
7274 final link, so do not presume they remain in range. */
7275 || tsec->output_section == isec->output_section))
7276 {
7277 bfd_vma symaddr, reladdr;
7278
7279 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7280 reladdr = isec->output_section->vma + isec->output_offset + roff;
7281 if (symaddr - reladdr + max_branch_offset
7282 < 2 * max_branch_offset)
7283 continue;
7284 }
7285
7286 /* Look for an existing fixup to this address. */
7287 for (f = branch_fixups; f ; f = f->next)
7288 if (f->tsec == tsec && f->toff == toff)
7289 break;
7290
7291 if (f == NULL)
7292 {
7293 size_t size;
7294 unsigned long stub_rtype;
7295
7296 val = trampoff - roff;
7297 if (val >= max_branch_offset)
7298 /* Oh dear, we can't reach a trampoline. Don't try to add
7299 one. We'll report an error later. */
7300 continue;
7301
7302 if (bfd_link_pic (link_info))
7303 {
7304 size = 4 * ARRAY_SIZE (shared_stub_entry);
7305 insn_offset = 12;
7306 }
7307 else
7308 {
7309 size = 4 * ARRAY_SIZE (stub_entry);
7310 insn_offset = 0;
7311 }
7312 stub_rtype = R_PPC_RELAX;
7313 if (tsec == htab->elf.splt
7314 || tsec == htab->glink)
7315 {
7316 stub_rtype = R_PPC_RELAX_PLT;
7317 if (r_type == R_PPC_PLTREL24)
7318 stub_rtype = R_PPC_RELAX_PLTREL24;
7319 }
7320
7321 /* Hijack the old relocation. Since we need two
7322 relocations for this use a "composite" reloc. */
7323 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7324 stub_rtype);
7325 irel->r_offset = trampoff + insn_offset;
7326 if (r_type == R_PPC_PLTREL24
7327 && stub_rtype != R_PPC_RELAX_PLTREL24)
7328 irel->r_addend = 0;
7329
7330 /* Record the fixup so we don't do it again this section. */
7331 f = bfd_malloc (sizeof (*f));
7332 f->next = branch_fixups;
7333 f->tsec = tsec;
7334 f->toff = toff;
7335 f->trampoff = trampoff;
7336 branch_fixups = f;
7337
7338 trampoff += size;
7339 changes++;
7340 }
7341 else
7342 {
7343 val = f->trampoff - roff;
7344 if (val >= max_branch_offset)
7345 continue;
7346
7347 /* Nop out the reloc, since we're finalizing things here. */
7348 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7349 }
7350
7351 /* Get the section contents. */
7352 if (contents == NULL)
7353 {
7354 /* Get cached copy if it exists. */
7355 if (elf_section_data (isec)->this_hdr.contents != NULL)
7356 contents = elf_section_data (isec)->this_hdr.contents;
7357 /* Go get them off disk. */
7358 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7359 goto error_return;
7360 }
7361
7362 /* Fix up the existing branch to hit the trampoline. */
7363 hit_addr = contents + roff;
7364 switch (r_type)
7365 {
7366 case R_PPC_REL24:
7367 case R_PPC_LOCAL24PC:
7368 case R_PPC_PLTREL24:
7369 t0 = bfd_get_32 (abfd, hit_addr);
7370 t0 &= ~0x3fffffc;
7371 t0 |= val & 0x3fffffc;
7372 bfd_put_32 (abfd, t0, hit_addr);
7373 break;
7374
7375 case R_PPC_REL14:
7376 case R_PPC_REL14_BRTAKEN:
7377 case R_PPC_REL14_BRNTAKEN:
7378 t0 = bfd_get_32 (abfd, hit_addr);
7379 t0 &= ~0xfffc;
7380 t0 |= val & 0xfffc;
7381 bfd_put_32 (abfd, t0, hit_addr);
7382 break;
7383 }
7384 }
7385
7386 while (branch_fixups != NULL)
7387 {
7388 struct one_branch_fixup *f = branch_fixups;
7389 branch_fixups = branch_fixups->next;
7390 free (f);
7391 }
7392 }
7393
7394 workaround_change = FALSE;
7395 newsize = trampoff;
7396 if (htab->params->ppc476_workaround
7397 && (!bfd_link_relocatable (link_info)
7398 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7399 {
7400 bfd_vma addr, end_addr;
7401 unsigned int crossings;
7402 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7403
7404 addr = isec->output_section->vma + isec->output_offset;
7405 end_addr = addr + trampoff;
7406 addr &= -pagesize;
7407 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7408 if (crossings != 0)
7409 {
7410 /* Keep space aligned, to ensure the patch code itself does
7411 not cross a page. Don't decrease size calculated on a
7412 previous pass as otherwise we might never settle on a layout. */
7413 newsize = 15 - ((end_addr - 1) & 15);
7414 newsize += crossings * 16;
7415 if (relax_info->workaround_size < newsize)
7416 {
7417 relax_info->workaround_size = newsize;
7418 workaround_change = TRUE;
7419 }
7420 /* Ensure relocate_section is called. */
7421 isec->flags |= SEC_RELOC;
7422 }
7423 newsize = trampoff + relax_info->workaround_size;
7424 }
7425
7426 if (htab->params->pic_fixup > 0)
7427 {
7428 picfixup_size -= relax_info->picfixup_size;
7429 if (picfixup_size != 0)
7430 relax_info->picfixup_size += picfixup_size;
7431 newsize += relax_info->picfixup_size;
7432 }
7433
7434 if (changes != 0 || picfixup_size != 0 || workaround_change)
7435 isec->size = newsize;
7436
7437 if (isymbuf != NULL
7438 && symtab_hdr->contents != (unsigned char *) isymbuf)
7439 {
7440 if (! link_info->keep_memory)
7441 free (isymbuf);
7442 else
7443 {
7444 /* Cache the symbols for elf_link_input_bfd. */
7445 symtab_hdr->contents = (unsigned char *) isymbuf;
7446 }
7447 }
7448
7449 if (contents != NULL
7450 && elf_section_data (isec)->this_hdr.contents != contents)
7451 {
7452 if (!changes && !link_info->keep_memory)
7453 free (contents);
7454 else
7455 {
7456 /* Cache the section contents for elf_link_input_bfd. */
7457 elf_section_data (isec)->this_hdr.contents = contents;
7458 }
7459 }
7460
7461 changes += picfixup_size;
7462 if (changes != 0)
7463 {
7464 /* Append sufficient NOP relocs so we can write out relocation
7465 information for the trampolines. */
7466 Elf_Internal_Shdr *rel_hdr;
7467 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7468 * sizeof (*new_relocs));
7469 unsigned ix;
7470
7471 if (!new_relocs)
7472 goto error_return;
7473 memcpy (new_relocs, internal_relocs,
7474 isec->reloc_count * sizeof (*new_relocs));
7475 for (ix = changes; ix--;)
7476 {
7477 irel = new_relocs + ix + isec->reloc_count;
7478
7479 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7480 }
7481 if (internal_relocs != elf_section_data (isec)->relocs)
7482 free (internal_relocs);
7483 elf_section_data (isec)->relocs = new_relocs;
7484 isec->reloc_count += changes;
7485 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7486 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7487 }
7488 else if (internal_relocs != NULL
7489 && elf_section_data (isec)->relocs != internal_relocs)
7490 free (internal_relocs);
7491
7492 *again = changes != 0 || workaround_change;
7493 return TRUE;
7494
7495 error_return:
7496 while (branch_fixups != NULL)
7497 {
7498 struct one_branch_fixup *f = branch_fixups;
7499 branch_fixups = branch_fixups->next;
7500 free (f);
7501 }
7502 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7503 free (isymbuf);
7504 if (contents != NULL
7505 && elf_section_data (isec)->this_hdr.contents != contents)
7506 free (contents);
7507 if (internal_relocs != NULL
7508 && elf_section_data (isec)->relocs != internal_relocs)
7509 free (internal_relocs);
7510 return FALSE;
7511 }
7512 \f
7513 /* What to do when ld finds relocations against symbols defined in
7514 discarded sections. */
7515
7516 static unsigned int
7517 ppc_elf_action_discarded (asection *sec)
7518 {
7519 if (strcmp (".fixup", sec->name) == 0)
7520 return 0;
7521
7522 if (strcmp (".got2", sec->name) == 0)
7523 return 0;
7524
7525 return _bfd_elf_default_action_discarded (sec);
7526 }
7527 \f
7528 /* Fill in the address for a pointer generated in a linker section. */
7529
7530 static bfd_vma
7531 elf_finish_pointer_linker_section (bfd *input_bfd,
7532 elf_linker_section_t *lsect,
7533 struct elf_link_hash_entry *h,
7534 bfd_vma relocation,
7535 const Elf_Internal_Rela *rel)
7536 {
7537 elf_linker_section_pointers_t *linker_section_ptr;
7538
7539 BFD_ASSERT (lsect != NULL);
7540
7541 if (h != NULL)
7542 {
7543 /* Handle global symbol. */
7544 struct ppc_elf_link_hash_entry *eh;
7545
7546 eh = (struct ppc_elf_link_hash_entry *) h;
7547 BFD_ASSERT (eh->elf.def_regular);
7548 linker_section_ptr = eh->linker_section_pointer;
7549 }
7550 else
7551 {
7552 /* Handle local symbol. */
7553 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7554
7555 BFD_ASSERT (is_ppc_elf (input_bfd));
7556 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7557 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7558 }
7559
7560 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7561 rel->r_addend,
7562 lsect);
7563 BFD_ASSERT (linker_section_ptr != NULL);
7564
7565 /* Offset will always be a multiple of four, so use the bottom bit
7566 as a "written" flag. */
7567 if ((linker_section_ptr->offset & 1) == 0)
7568 {
7569 bfd_put_32 (lsect->section->owner,
7570 relocation + linker_section_ptr->addend,
7571 lsect->section->contents + linker_section_ptr->offset);
7572 linker_section_ptr->offset += 1;
7573 }
7574
7575 relocation = (lsect->section->output_section->vma
7576 + lsect->section->output_offset
7577 + linker_section_ptr->offset - 1
7578 - SYM_VAL (lsect->sym));
7579
7580 #ifdef DEBUG
7581 fprintf (stderr,
7582 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7583 lsect->name, (long) relocation, (long) relocation);
7584 #endif
7585
7586 return relocation;
7587 }
7588
7589 #define PPC_LO(v) ((v) & 0xffff)
7590 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7591 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7592
7593 static void
7594 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7595 struct bfd_link_info *info)
7596 {
7597 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7598 bfd *output_bfd = info->output_bfd;
7599 bfd_vma plt;
7600
7601 plt = ((ent->plt.offset & ~1)
7602 + plt_sec->output_section->vma
7603 + plt_sec->output_offset);
7604
7605 if (bfd_link_pic (info))
7606 {
7607 bfd_vma got = 0;
7608
7609 if (ent->addend >= 32768)
7610 got = (ent->addend
7611 + ent->sec->output_section->vma
7612 + ent->sec->output_offset);
7613 else if (htab->elf.hgot != NULL)
7614 got = SYM_VAL (htab->elf.hgot);
7615
7616 plt -= got;
7617
7618 if (plt + 0x8000 < 0x10000)
7619 {
7620 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7621 p += 4;
7622 bfd_put_32 (output_bfd, MTCTR_11, p);
7623 p += 4;
7624 bfd_put_32 (output_bfd, BCTR, p);
7625 p += 4;
7626 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7627 p += 4;
7628 }
7629 else
7630 {
7631 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7632 p += 4;
7633 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, MTCTR_11, p);
7636 p += 4;
7637 bfd_put_32 (output_bfd, BCTR, p);
7638 p += 4;
7639 }
7640 }
7641 else
7642 {
7643 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7644 p += 4;
7645 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7646 p += 4;
7647 bfd_put_32 (output_bfd, MTCTR_11, p);
7648 p += 4;
7649 bfd_put_32 (output_bfd, BCTR, p);
7650 p += 4;
7651 }
7652 }
7653
7654 /* Return true if symbol is defined statically. */
7655
7656 static bfd_boolean
7657 is_static_defined (struct elf_link_hash_entry *h)
7658 {
7659 return ((h->root.type == bfd_link_hash_defined
7660 || h->root.type == bfd_link_hash_defweak)
7661 && h->root.u.def.section != NULL
7662 && h->root.u.def.section->output_section != NULL);
7663 }
7664
7665 /* If INSN is an opcode that may be used with an @tls operand, return
7666 the transformed insn for TLS optimisation, otherwise return 0. If
7667 REG is non-zero only match an insn with RB or RA equal to REG. */
7668
7669 unsigned int
7670 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7671 {
7672 unsigned int rtra;
7673
7674 if ((insn & (0x3f << 26)) != 31 << 26)
7675 return 0;
7676
7677 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7678 rtra = insn & ((1 << 26) - (1 << 16));
7679 else if (((insn >> 16) & 0x1f) == reg)
7680 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7681 else
7682 return 0;
7683
7684 if ((insn & (0x3ff << 1)) == 266 << 1)
7685 /* add -> addi. */
7686 insn = 14 << 26;
7687 else if ((insn & (0x1f << 1)) == 23 << 1
7688 && ((insn & (0x1f << 6)) < 14 << 6
7689 || ((insn & (0x1f << 6)) >= 16 << 6
7690 && (insn & (0x1f << 6)) < 24 << 6)))
7691 /* load and store indexed -> dform. */
7692 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7693 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7694 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7695 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7696 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7697 /* lwax -> lwa. */
7698 insn = (58 << 26) | 2;
7699 else
7700 return 0;
7701 insn |= rtra;
7702 return insn;
7703 }
7704
7705 /* If INSN is an opcode that may be used with an @tprel operand, return
7706 the transformed insn for an undefined weak symbol, ie. with the
7707 thread pointer REG operand removed. Otherwise return 0. */
7708
7709 unsigned int
7710 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7711 {
7712 if ((insn & (0x1f << 16)) == reg << 16
7713 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7714 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7715 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7716 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7717 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7718 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7719 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7720 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7721 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7722 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7723 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7724 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7725 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7726 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7727 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7728 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7729 && (insn & 3) != 1)
7730 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7731 && ((insn & 3) == 0 || (insn & 3) == 3))))
7732 {
7733 insn &= ~(0x1f << 16);
7734 }
7735 else if ((insn & (0x1f << 21)) == reg << 21
7736 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7737 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7738 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7739 {
7740 insn &= ~(0x1f << 21);
7741 insn |= (insn & (0x1f << 16)) << 5;
7742 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7743 insn -= 2 >> 26; /* convert to ori,oris */
7744 }
7745 else
7746 insn = 0;
7747 return insn;
7748 }
7749
7750 static bfd_boolean
7751 is_insn_ds_form (unsigned int insn)
7752 {
7753 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7754 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7755 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7756 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7757 }
7758
7759 static bfd_boolean
7760 is_insn_dq_form (unsigned int insn)
7761 {
7762 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7763 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7764 && (insn & 3) == 1));
7765 }
7766
7767 /* The RELOCATE_SECTION function is called by the ELF backend linker
7768 to handle the relocations for a section.
7769
7770 The relocs are always passed as Rela structures; if the section
7771 actually uses Rel structures, the r_addend field will always be
7772 zero.
7773
7774 This function is responsible for adjust the section contents as
7775 necessary, and (if using Rela relocs and generating a
7776 relocatable output file) adjusting the reloc addend as
7777 necessary.
7778
7779 This function does not have to worry about setting the reloc
7780 address or the reloc symbol index.
7781
7782 LOCAL_SYMS is a pointer to the swapped in local symbols.
7783
7784 LOCAL_SECTIONS is an array giving the section in the input file
7785 corresponding to the st_shndx field of each local symbol.
7786
7787 The global hash table entry for the global symbols can be found
7788 via elf_sym_hashes (input_bfd).
7789
7790 When generating relocatable output, this function must handle
7791 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7792 going to be the section symbol corresponding to the output
7793 section, which means that the addend must be adjusted
7794 accordingly. */
7795
7796 static bfd_boolean
7797 ppc_elf_relocate_section (bfd *output_bfd,
7798 struct bfd_link_info *info,
7799 bfd *input_bfd,
7800 asection *input_section,
7801 bfd_byte *contents,
7802 Elf_Internal_Rela *relocs,
7803 Elf_Internal_Sym *local_syms,
7804 asection **local_sections)
7805 {
7806 Elf_Internal_Shdr *symtab_hdr;
7807 struct elf_link_hash_entry **sym_hashes;
7808 struct ppc_elf_link_hash_table *htab;
7809 Elf_Internal_Rela *rel;
7810 Elf_Internal_Rela *wrel;
7811 Elf_Internal_Rela *relend;
7812 Elf_Internal_Rela outrel;
7813 asection *got2;
7814 bfd_vma *local_got_offsets;
7815 bfd_boolean ret = TRUE;
7816 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7817 bfd_boolean is_vxworks_tls;
7818 unsigned int picfixup_size = 0;
7819 struct ppc_elf_relax_info *relax_info = NULL;
7820
7821 #ifdef DEBUG
7822 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7823 "%ld relocations%s",
7824 input_bfd, input_section,
7825 (long) input_section->reloc_count,
7826 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7827 #endif
7828
7829 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7830
7831 /* Initialize howto table if not already done. */
7832 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7833 ppc_elf_howto_init ();
7834
7835 htab = ppc_elf_hash_table (info);
7836 local_got_offsets = elf_local_got_offsets (input_bfd);
7837 symtab_hdr = &elf_symtab_hdr (input_bfd);
7838 sym_hashes = elf_sym_hashes (input_bfd);
7839 /* We have to handle relocations in vxworks .tls_vars sections
7840 specially, because the dynamic loader is 'weird'. */
7841 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7842 && !strcmp (input_section->output_section->name,
7843 ".tls_vars"));
7844 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7845 relax_info = elf_section_data (input_section)->sec_info;
7846 rel = wrel = relocs;
7847 relend = relocs + input_section->reloc_count;
7848 for (; rel < relend; wrel++, rel++)
7849 {
7850 enum elf_ppc_reloc_type r_type;
7851 bfd_vma addend;
7852 bfd_reloc_status_type r;
7853 Elf_Internal_Sym *sym;
7854 asection *sec;
7855 struct elf_link_hash_entry *h;
7856 const char *sym_name;
7857 reloc_howto_type *howto;
7858 unsigned long r_symndx;
7859 bfd_vma relocation;
7860 bfd_vma branch_bit, from;
7861 bfd_boolean unresolved_reloc;
7862 bfd_boolean warned;
7863 unsigned int tls_type, tls_mask, tls_gd;
7864 struct plt_entry **ifunc;
7865 struct reloc_howto_struct alt_howto;
7866
7867 again:
7868 r_type = ELF32_R_TYPE (rel->r_info);
7869 sym = NULL;
7870 sec = NULL;
7871 h = NULL;
7872 unresolved_reloc = FALSE;
7873 warned = FALSE;
7874 r_symndx = ELF32_R_SYM (rel->r_info);
7875
7876 if (r_symndx < symtab_hdr->sh_info)
7877 {
7878 sym = local_syms + r_symndx;
7879 sec = local_sections[r_symndx];
7880 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7881
7882 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7883 }
7884 else
7885 {
7886 bfd_boolean ignored;
7887
7888 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7889 r_symndx, symtab_hdr, sym_hashes,
7890 h, sec, relocation,
7891 unresolved_reloc, warned, ignored);
7892
7893 sym_name = h->root.root.string;
7894 }
7895
7896 if (sec != NULL && discarded_section (sec))
7897 {
7898 /* For relocs against symbols from removed linkonce sections,
7899 or sections discarded by a linker script, we just want the
7900 section contents zeroed. Avoid any special processing. */
7901 howto = NULL;
7902 if (r_type < R_PPC_max)
7903 howto = ppc_elf_howto_table[r_type];
7904
7905 _bfd_clear_contents (howto, input_bfd, input_section,
7906 contents + rel->r_offset);
7907 wrel->r_offset = rel->r_offset;
7908 wrel->r_info = 0;
7909 wrel->r_addend = 0;
7910
7911 /* For ld -r, remove relocations in debug sections against
7912 sections defined in discarded sections. Not done for
7913 non-debug to preserve relocs in .eh_frame which the
7914 eh_frame editing code expects to be present. */
7915 if (bfd_link_relocatable (info)
7916 && (input_section->flags & SEC_DEBUGGING))
7917 wrel--;
7918
7919 continue;
7920 }
7921
7922 if (bfd_link_relocatable (info))
7923 {
7924 if (got2 != NULL
7925 && r_type == R_PPC_PLTREL24
7926 && rel->r_addend != 0)
7927 {
7928 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7929 addend specifies the GOT pointer offset within .got2. */
7930 rel->r_addend += got2->output_offset;
7931 }
7932 if (r_type != R_PPC_RELAX_PLT
7933 && r_type != R_PPC_RELAX_PLTREL24
7934 && r_type != R_PPC_RELAX)
7935 goto copy_reloc;
7936 }
7937
7938 /* TLS optimizations. Replace instruction sequences and relocs
7939 based on information we collected in tls_optimize. We edit
7940 RELOCS so that --emit-relocs will output something sensible
7941 for the final instruction stream. */
7942 tls_mask = 0;
7943 tls_gd = 0;
7944 if (h != NULL)
7945 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7946 else if (local_got_offsets != NULL)
7947 {
7948 struct plt_entry **local_plt;
7949 char *lgot_masks;
7950 local_plt
7951 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7952 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7953 tls_mask = lgot_masks[r_symndx];
7954 }
7955
7956 /* Ensure reloc mapping code below stays sane. */
7957 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7958 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7959 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7960 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7961 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7962 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7963 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7964 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7965 abort ();
7966 switch (r_type)
7967 {
7968 default:
7969 break;
7970
7971 case R_PPC_GOT_TPREL16:
7972 case R_PPC_GOT_TPREL16_LO:
7973 if ((tls_mask & TLS_TLS) != 0
7974 && (tls_mask & TLS_TPREL) == 0)
7975 {
7976 bfd_vma insn;
7977
7978 insn = bfd_get_32 (input_bfd,
7979 contents + rel->r_offset - d_offset);
7980 insn &= 31 << 21;
7981 insn |= 0x3c020000; /* addis 0,2,0 */
7982 bfd_put_32 (input_bfd, insn,
7983 contents + rel->r_offset - d_offset);
7984 r_type = R_PPC_TPREL16_HA;
7985 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7986 }
7987 break;
7988
7989 case R_PPC_TLS:
7990 if ((tls_mask & TLS_TLS) != 0
7991 && (tls_mask & TLS_TPREL) == 0)
7992 {
7993 bfd_vma insn;
7994
7995 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7996 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7997 if (insn == 0)
7998 abort ();
7999 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8000 r_type = R_PPC_TPREL16_LO;
8001 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8002
8003 /* Was PPC_TLS which sits on insn boundary, now
8004 PPC_TPREL16_LO which is at low-order half-word. */
8005 rel->r_offset += d_offset;
8006 }
8007 break;
8008
8009 case R_PPC_GOT_TLSGD16_HI:
8010 case R_PPC_GOT_TLSGD16_HA:
8011 tls_gd = TLS_TPRELGD;
8012 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8013 goto tls_gdld_hi;
8014 break;
8015
8016 case R_PPC_GOT_TLSLD16_HI:
8017 case R_PPC_GOT_TLSLD16_HA:
8018 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8019 {
8020 tls_gdld_hi:
8021 if ((tls_mask & tls_gd) != 0)
8022 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8023 + R_PPC_GOT_TPREL16);
8024 else
8025 {
8026 rel->r_offset -= d_offset;
8027 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8028 r_type = R_PPC_NONE;
8029 }
8030 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8031 }
8032 break;
8033
8034 case R_PPC_GOT_TLSGD16:
8035 case R_PPC_GOT_TLSGD16_LO:
8036 tls_gd = TLS_TPRELGD;
8037 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8038 goto tls_ldgd_opt;
8039 break;
8040
8041 case R_PPC_GOT_TLSLD16:
8042 case R_PPC_GOT_TLSLD16_LO:
8043 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8044 {
8045 unsigned int insn1, insn2;
8046 bfd_vma offset;
8047
8048 tls_ldgd_opt:
8049 offset = (bfd_vma) -1;
8050 /* If not using the newer R_PPC_TLSGD/LD to mark
8051 __tls_get_addr calls, we must trust that the call
8052 stays with its arg setup insns, ie. that the next
8053 reloc is the __tls_get_addr call associated with
8054 the current reloc. Edit both insns. */
8055 if (input_section->has_tls_get_addr_call
8056 && rel + 1 < relend
8057 && branch_reloc_hash_match (input_bfd, rel + 1,
8058 htab->tls_get_addr))
8059 offset = rel[1].r_offset;
8060 /* We read the low GOT_TLS insn because we need to keep
8061 the destination reg. It may be something other than
8062 the usual r3, and moved to r3 before the call by
8063 intervening code. */
8064 insn1 = bfd_get_32 (input_bfd,
8065 contents + rel->r_offset - d_offset);
8066 if ((tls_mask & tls_gd) != 0)
8067 {
8068 /* IE */
8069 insn1 &= (0x1f << 21) | (0x1f << 16);
8070 insn1 |= 32 << 26; /* lwz */
8071 if (offset != (bfd_vma) -1)
8072 {
8073 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8074 insn2 = 0x7c631214; /* add 3,3,2 */
8075 bfd_put_32 (input_bfd, insn2, contents + offset);
8076 }
8077 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8078 + R_PPC_GOT_TPREL16);
8079 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8080 }
8081 else
8082 {
8083 /* LE */
8084 insn1 &= 0x1f << 21;
8085 insn1 |= 0x3c020000; /* addis r,2,0 */
8086 if (tls_gd == 0)
8087 {
8088 /* Was an LD reloc. */
8089 for (r_symndx = 0;
8090 r_symndx < symtab_hdr->sh_info;
8091 r_symndx++)
8092 if (local_sections[r_symndx] == sec)
8093 break;
8094 if (r_symndx >= symtab_hdr->sh_info)
8095 r_symndx = STN_UNDEF;
8096 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8097 if (r_symndx != STN_UNDEF)
8098 rel->r_addend -= (local_syms[r_symndx].st_value
8099 + sec->output_offset
8100 + sec->output_section->vma);
8101 }
8102 r_type = R_PPC_TPREL16_HA;
8103 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8104 if (offset != (bfd_vma) -1)
8105 {
8106 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8107 rel[1].r_offset = offset + d_offset;
8108 rel[1].r_addend = rel->r_addend;
8109 insn2 = 0x38630000; /* addi 3,3,0 */
8110 bfd_put_32 (input_bfd, insn2, contents + offset);
8111 }
8112 }
8113 bfd_put_32 (input_bfd, insn1,
8114 contents + rel->r_offset - d_offset);
8115 if (tls_gd == 0)
8116 {
8117 /* We changed the symbol on an LD reloc. Start over
8118 in order to get h, sym, sec etc. right. */
8119 goto again;
8120 }
8121 }
8122 break;
8123
8124 case R_PPC_TLSGD:
8125 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8126 {
8127 unsigned int insn2;
8128 bfd_vma offset = rel->r_offset;
8129
8130 if ((tls_mask & TLS_TPRELGD) != 0)
8131 {
8132 /* IE */
8133 r_type = R_PPC_NONE;
8134 insn2 = 0x7c631214; /* add 3,3,2 */
8135 }
8136 else
8137 {
8138 /* LE */
8139 r_type = R_PPC_TPREL16_LO;
8140 rel->r_offset += d_offset;
8141 insn2 = 0x38630000; /* addi 3,3,0 */
8142 }
8143 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8144 bfd_put_32 (input_bfd, insn2, contents + offset);
8145 /* Zap the reloc on the _tls_get_addr call too. */
8146 BFD_ASSERT (offset == rel[1].r_offset);
8147 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8148 }
8149 break;
8150
8151 case R_PPC_TLSLD:
8152 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8153 {
8154 unsigned int insn2;
8155
8156 for (r_symndx = 0;
8157 r_symndx < symtab_hdr->sh_info;
8158 r_symndx++)
8159 if (local_sections[r_symndx] == sec)
8160 break;
8161 if (r_symndx >= symtab_hdr->sh_info)
8162 r_symndx = STN_UNDEF;
8163 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8164 if (r_symndx != STN_UNDEF)
8165 rel->r_addend -= (local_syms[r_symndx].st_value
8166 + sec->output_offset
8167 + sec->output_section->vma);
8168
8169 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8170 rel->r_offset += d_offset;
8171 insn2 = 0x38630000; /* addi 3,3,0 */
8172 bfd_put_32 (input_bfd, insn2,
8173 contents + rel->r_offset - d_offset);
8174 /* Zap the reloc on the _tls_get_addr call too. */
8175 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8176 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8177 goto again;
8178 }
8179 break;
8180 }
8181
8182 /* Handle other relocations that tweak non-addend part of insn. */
8183 branch_bit = 0;
8184 switch (r_type)
8185 {
8186 default:
8187 break;
8188
8189 /* Branch taken prediction relocations. */
8190 case R_PPC_ADDR14_BRTAKEN:
8191 case R_PPC_REL14_BRTAKEN:
8192 branch_bit = BRANCH_PREDICT_BIT;
8193 /* Fall through. */
8194
8195 /* Branch not taken prediction relocations. */
8196 case R_PPC_ADDR14_BRNTAKEN:
8197 case R_PPC_REL14_BRNTAKEN:
8198 {
8199 bfd_vma insn;
8200
8201 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8202 insn &= ~BRANCH_PREDICT_BIT;
8203 insn |= branch_bit;
8204
8205 from = (rel->r_offset
8206 + input_section->output_offset
8207 + input_section->output_section->vma);
8208
8209 /* Invert 'y' bit if not the default. */
8210 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8211 insn ^= BRANCH_PREDICT_BIT;
8212
8213 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8214 break;
8215 }
8216 }
8217
8218 if (ELIMINATE_COPY_RELOCS
8219 && h != NULL
8220 && !h->def_regular
8221 && h->protected_def
8222 && ppc_elf_hash_entry (h)->has_addr16_ha
8223 && ppc_elf_hash_entry (h)->has_addr16_lo
8224 && htab->params->pic_fixup > 0)
8225 {
8226 /* Convert lis;addi or lis;load/store accessing a protected
8227 variable defined in a shared library to PIC. */
8228 unsigned int insn;
8229
8230 if (r_type == R_PPC_ADDR16_HA)
8231 {
8232 insn = bfd_get_32 (input_bfd,
8233 contents + rel->r_offset - d_offset);
8234 if ((insn & (0x3f << 26)) == (15u << 26)
8235 && (insn & (0x1f << 16)) == 0 /* lis */)
8236 {
8237 bfd_byte *p;
8238 bfd_vma off;
8239 bfd_vma got_addr;
8240
8241 p = (contents + input_section->size
8242 - relax_info->workaround_size
8243 - relax_info->picfixup_size
8244 + picfixup_size);
8245 off = (p - contents) - (rel->r_offset - d_offset);
8246 if (off > 0x1fffffc || (off & 3) != 0)
8247 info->callbacks->einfo
8248 (_("%P: %H: fixup branch overflow\n"),
8249 input_bfd, input_section, rel->r_offset);
8250
8251 bfd_put_32 (input_bfd, B | off,
8252 contents + rel->r_offset - d_offset);
8253 got_addr = (htab->elf.sgot->output_section->vma
8254 + htab->elf.sgot->output_offset
8255 + (h->got.offset & ~1));
8256 wrel->r_offset = (p - contents) + d_offset;
8257 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8258 wrel->r_addend = got_addr;
8259 insn &= ~0xffff;
8260 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8261 bfd_put_32 (input_bfd, insn, p);
8262
8263 /* Convert lis to lwz, loading address from GOT. */
8264 insn &= ~0xffff;
8265 insn ^= (32u ^ 15u) << 26;
8266 insn |= (insn & (0x1f << 21)) >> 5;
8267 insn |= got_addr & 0xffff;
8268 bfd_put_32 (input_bfd, insn, p + 4);
8269
8270 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8271 picfixup_size += 12;
8272
8273 /* Use one of the spare relocs, so --emit-relocs
8274 output is reasonable. */
8275 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8276 wrel++, rel++;
8277 rel->r_offset = wrel[-1].r_offset + 4;
8278 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8279 rel->r_addend = wrel[-1].r_addend;
8280
8281 /* Continue on as if we had a got reloc, to output
8282 dynamic reloc. */
8283 r_type = R_PPC_GOT16_LO;
8284 }
8285 else
8286 info->callbacks->einfo
8287 /* xgettext:c-format */
8288 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8289 input_bfd, input_section, rel->r_offset,
8290 "R_PPC_ADDR16_HA", insn);
8291 }
8292 else if (r_type == R_PPC_ADDR16_LO)
8293 {
8294 insn = bfd_get_32 (input_bfd,
8295 contents + rel->r_offset - d_offset);
8296 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8297 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8298 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8299 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8300 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8301 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8302 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8303 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8304 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8305 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8306 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8307 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8308 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8309 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8310 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8311 && (insn & 3) != 1)
8312 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8313 && ((insn & 3) == 0 || (insn & 3) == 3)))
8314 {
8315 /* Arrange to apply the reloc addend, if any. */
8316 relocation = 0;
8317 unresolved_reloc = FALSE;
8318 rel->r_info = ELF32_R_INFO (0, r_type);
8319 }
8320 else
8321 info->callbacks->einfo
8322 /* xgettext:c-format */
8323 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8324 input_bfd, input_section, rel->r_offset,
8325 "R_PPC_ADDR16_LO", insn);
8326 }
8327 }
8328
8329 ifunc = NULL;
8330 if (!htab->is_vxworks)
8331 {
8332 struct plt_entry *ent;
8333
8334 if (h != NULL)
8335 {
8336 if (h->type == STT_GNU_IFUNC)
8337 ifunc = &h->plt.plist;
8338 }
8339 else if (local_got_offsets != NULL
8340 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8341 {
8342 struct plt_entry **local_plt;
8343
8344 local_plt = (struct plt_entry **) (local_got_offsets
8345 + symtab_hdr->sh_info);
8346 ifunc = local_plt + r_symndx;
8347 }
8348
8349 ent = NULL;
8350 if (ifunc != NULL
8351 && (!bfd_link_pic (info)
8352 || is_branch_reloc (r_type)))
8353 {
8354 addend = 0;
8355 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8356 addend = rel->r_addend;
8357 ent = find_plt_ent (ifunc, got2, addend);
8358 }
8359 if (ent != NULL)
8360 {
8361 if (bfd_link_pic (info)
8362 && ent->sec != got2
8363 && htab->plt_type != PLT_NEW
8364 && (!htab->elf.dynamic_sections_created
8365 || h == NULL
8366 || h->dynindx == -1))
8367 {
8368 /* Uh oh, we are going to create a pic glink stub
8369 for an ifunc (here for h == NULL and later in
8370 finish_dynamic_symbol for h != NULL), and
8371 apparently are using code compiled with
8372 -mbss-plt. The difficulty is that -mbss-plt code
8373 gives no indication via a magic PLTREL24 addend
8374 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8375 is pointing into a .got2 section (and how far
8376 into .got2). */
8377 info->callbacks->einfo
8378 /* xgettext:c-format */
8379 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8380 input_bfd, input_section, rel->r_offset, sym_name);
8381 }
8382 if (h == NULL && (ent->plt.offset & 1) == 0)
8383 {
8384 Elf_Internal_Rela rela;
8385 bfd_byte *loc;
8386
8387 rela.r_offset = (htab->elf.iplt->output_section->vma
8388 + htab->elf.iplt->output_offset
8389 + ent->plt.offset);
8390 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8391 rela.r_addend = relocation;
8392 loc = htab->elf.irelplt->contents;
8393 loc += (htab->elf.irelplt->reloc_count++
8394 * sizeof (Elf32_External_Rela));
8395 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8396
8397 ent->plt.offset |= 1;
8398 }
8399 if (h == NULL && (ent->glink_offset & 1) == 0)
8400 {
8401 unsigned char *p = ((unsigned char *) htab->glink->contents
8402 + ent->glink_offset);
8403 write_glink_stub (ent, htab->elf.iplt, p, info);
8404 ent->glink_offset |= 1;
8405 }
8406
8407 unresolved_reloc = FALSE;
8408 if (htab->plt_type == PLT_NEW
8409 || !htab->elf.dynamic_sections_created
8410 || h == NULL
8411 || h->dynindx == -1)
8412 relocation = (htab->glink->output_section->vma
8413 + htab->glink->output_offset
8414 + (ent->glink_offset & ~1));
8415 else
8416 relocation = (htab->elf.splt->output_section->vma
8417 + htab->elf.splt->output_offset
8418 + ent->plt.offset);
8419 }
8420 }
8421
8422 addend = rel->r_addend;
8423 tls_type = 0;
8424 howto = NULL;
8425 if (r_type < R_PPC_max)
8426 howto = ppc_elf_howto_table[r_type];
8427 switch (r_type)
8428 {
8429 default:
8430 info->callbacks->einfo
8431 /* xgettext:c-format */
8432 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8433 input_bfd, (int) r_type, sym_name);
8434
8435 bfd_set_error (bfd_error_bad_value);
8436 ret = FALSE;
8437 goto copy_reloc;
8438
8439 case R_PPC_NONE:
8440 case R_PPC_TLS:
8441 case R_PPC_TLSGD:
8442 case R_PPC_TLSLD:
8443 case R_PPC_EMB_MRKREF:
8444 case R_PPC_GNU_VTINHERIT:
8445 case R_PPC_GNU_VTENTRY:
8446 goto copy_reloc;
8447
8448 /* GOT16 relocations. Like an ADDR16 using the symbol's
8449 address in the GOT as relocation value instead of the
8450 symbol's value itself. Also, create a GOT entry for the
8451 symbol and put the symbol value there. */
8452 case R_PPC_GOT_TLSGD16:
8453 case R_PPC_GOT_TLSGD16_LO:
8454 case R_PPC_GOT_TLSGD16_HI:
8455 case R_PPC_GOT_TLSGD16_HA:
8456 tls_type = TLS_TLS | TLS_GD;
8457 goto dogot;
8458
8459 case R_PPC_GOT_TLSLD16:
8460 case R_PPC_GOT_TLSLD16_LO:
8461 case R_PPC_GOT_TLSLD16_HI:
8462 case R_PPC_GOT_TLSLD16_HA:
8463 tls_type = TLS_TLS | TLS_LD;
8464 goto dogot;
8465
8466 case R_PPC_GOT_TPREL16:
8467 case R_PPC_GOT_TPREL16_LO:
8468 case R_PPC_GOT_TPREL16_HI:
8469 case R_PPC_GOT_TPREL16_HA:
8470 tls_type = TLS_TLS | TLS_TPREL;
8471 goto dogot;
8472
8473 case R_PPC_GOT_DTPREL16:
8474 case R_PPC_GOT_DTPREL16_LO:
8475 case R_PPC_GOT_DTPREL16_HI:
8476 case R_PPC_GOT_DTPREL16_HA:
8477 tls_type = TLS_TLS | TLS_DTPREL;
8478 goto dogot;
8479
8480 case R_PPC_GOT16:
8481 case R_PPC_GOT16_LO:
8482 case R_PPC_GOT16_HI:
8483 case R_PPC_GOT16_HA:
8484 tls_mask = 0;
8485 dogot:
8486 {
8487 /* Relocation is to the entry for this symbol in the global
8488 offset table. */
8489 bfd_vma off;
8490 bfd_vma *offp;
8491 unsigned long indx;
8492
8493 if (htab->elf.sgot == NULL)
8494 abort ();
8495
8496 indx = 0;
8497 if (tls_type == (TLS_TLS | TLS_LD)
8498 && (h == NULL
8499 || !h->def_dynamic))
8500 offp = &htab->tlsld_got.offset;
8501 else if (h != NULL)
8502 {
8503 bfd_boolean dyn;
8504 dyn = htab->elf.dynamic_sections_created;
8505 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8506 || (bfd_link_pic (info)
8507 && SYMBOL_REFERENCES_LOCAL (info, h)))
8508 /* This is actually a static link, or it is a
8509 -Bsymbolic link and the symbol is defined
8510 locally, or the symbol was forced to be local
8511 because of a version file. */
8512 ;
8513 else
8514 {
8515 BFD_ASSERT (h->dynindx != -1);
8516 indx = h->dynindx;
8517 unresolved_reloc = FALSE;
8518 }
8519 offp = &h->got.offset;
8520 }
8521 else
8522 {
8523 if (local_got_offsets == NULL)
8524 abort ();
8525 offp = &local_got_offsets[r_symndx];
8526 }
8527
8528 /* The offset must always be a multiple of 4. We use the
8529 least significant bit to record whether we have already
8530 processed this entry. */
8531 off = *offp;
8532 if ((off & 1) != 0)
8533 off &= ~1;
8534 else
8535 {
8536 unsigned int tls_m = (tls_mask
8537 & (TLS_LD | TLS_GD | TLS_DTPREL
8538 | TLS_TPREL | TLS_TPRELGD));
8539
8540 if (offp == &htab->tlsld_got.offset)
8541 tls_m = TLS_LD;
8542 else if (h == NULL
8543 || !h->def_dynamic)
8544 tls_m &= ~TLS_LD;
8545
8546 /* We might have multiple got entries for this sym.
8547 Initialize them all. */
8548 do
8549 {
8550 int tls_ty = 0;
8551
8552 if ((tls_m & TLS_LD) != 0)
8553 {
8554 tls_ty = TLS_TLS | TLS_LD;
8555 tls_m &= ~TLS_LD;
8556 }
8557 else if ((tls_m & TLS_GD) != 0)
8558 {
8559 tls_ty = TLS_TLS | TLS_GD;
8560 tls_m &= ~TLS_GD;
8561 }
8562 else if ((tls_m & TLS_DTPREL) != 0)
8563 {
8564 tls_ty = TLS_TLS | TLS_DTPREL;
8565 tls_m &= ~TLS_DTPREL;
8566 }
8567 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8568 {
8569 tls_ty = TLS_TLS | TLS_TPREL;
8570 tls_m = 0;
8571 }
8572
8573 /* Generate relocs for the dynamic linker. */
8574 if ((bfd_link_pic (info) || indx != 0)
8575 && (offp == &htab->tlsld_got.offset
8576 || h == NULL
8577 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8578 || h->root.type != bfd_link_hash_undefweak))
8579 {
8580 asection *rsec = htab->elf.srelgot;
8581 bfd_byte * loc;
8582
8583 if (ifunc != NULL)
8584 rsec = htab->elf.irelplt;
8585 outrel.r_offset = (htab->elf.sgot->output_section->vma
8586 + htab->elf.sgot->output_offset
8587 + off);
8588 outrel.r_addend = 0;
8589 if (tls_ty & (TLS_LD | TLS_GD))
8590 {
8591 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8592 if (tls_ty == (TLS_TLS | TLS_GD))
8593 {
8594 loc = rsec->contents;
8595 loc += (rsec->reloc_count++
8596 * sizeof (Elf32_External_Rela));
8597 bfd_elf32_swap_reloca_out (output_bfd,
8598 &outrel, loc);
8599 outrel.r_offset += 4;
8600 outrel.r_info
8601 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8602 }
8603 }
8604 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8605 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8606 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8607 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8608 else if (indx != 0)
8609 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8610 else if (ifunc != NULL)
8611 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8612 else
8613 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8614 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8615 {
8616 outrel.r_addend += relocation;
8617 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8618 {
8619 if (htab->elf.tls_sec == NULL)
8620 outrel.r_addend = 0;
8621 else
8622 outrel.r_addend -= htab->elf.tls_sec->vma;
8623 }
8624 }
8625 loc = rsec->contents;
8626 loc += (rsec->reloc_count++
8627 * sizeof (Elf32_External_Rela));
8628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8629 }
8630
8631 /* Init the .got section contents if we're not
8632 emitting a reloc. */
8633 else
8634 {
8635 bfd_vma value = relocation;
8636
8637 if (tls_ty == (TLS_TLS | TLS_LD))
8638 value = 1;
8639 else if (tls_ty != 0)
8640 {
8641 if (htab->elf.tls_sec == NULL)
8642 value = 0;
8643 else
8644 {
8645 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8646 if (tls_ty == (TLS_TLS | TLS_TPREL))
8647 value += DTP_OFFSET - TP_OFFSET;
8648 }
8649
8650 if (tls_ty == (TLS_TLS | TLS_GD))
8651 {
8652 bfd_put_32 (input_bfd, value,
8653 htab->elf.sgot->contents + off + 4);
8654 value = 1;
8655 }
8656 }
8657 bfd_put_32 (input_bfd, value,
8658 htab->elf.sgot->contents + off);
8659 }
8660
8661 off += 4;
8662 if (tls_ty & (TLS_LD | TLS_GD))
8663 off += 4;
8664 }
8665 while (tls_m != 0);
8666
8667 off = *offp;
8668 *offp = off | 1;
8669 }
8670
8671 if (off >= (bfd_vma) -2)
8672 abort ();
8673
8674 if ((tls_type & TLS_TLS) != 0)
8675 {
8676 if (tls_type != (TLS_TLS | TLS_LD))
8677 {
8678 if ((tls_mask & TLS_LD) != 0
8679 && !(h == NULL
8680 || !h->def_dynamic))
8681 off += 8;
8682 if (tls_type != (TLS_TLS | TLS_GD))
8683 {
8684 if ((tls_mask & TLS_GD) != 0)
8685 off += 8;
8686 if (tls_type != (TLS_TLS | TLS_DTPREL))
8687 {
8688 if ((tls_mask & TLS_DTPREL) != 0)
8689 off += 4;
8690 }
8691 }
8692 }
8693 }
8694
8695 /* If here for a picfixup, we're done. */
8696 if (r_type != ELF32_R_TYPE (rel->r_info))
8697 goto copy_reloc;
8698
8699 relocation = (htab->elf.sgot->output_section->vma
8700 + htab->elf.sgot->output_offset
8701 + off
8702 - SYM_VAL (htab->elf.hgot));
8703
8704 /* Addends on got relocations don't make much sense.
8705 x+off@got is actually x@got+off, and since the got is
8706 generated by a hash table traversal, the value in the
8707 got at entry m+n bears little relation to the entry m. */
8708 if (addend != 0)
8709 info->callbacks->einfo
8710 /* xgettext:c-format */
8711 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8712 input_bfd, input_section, rel->r_offset,
8713 howto->name,
8714 sym_name);
8715 }
8716 break;
8717
8718 /* Relocations that need no special processing. */
8719 case R_PPC_LOCAL24PC:
8720 /* It makes no sense to point a local relocation
8721 at a symbol not in this object. */
8722 if (unresolved_reloc)
8723 {
8724 (*info->callbacks->undefined_symbol) (info,
8725 h->root.root.string,
8726 input_bfd,
8727 input_section,
8728 rel->r_offset,
8729 TRUE);
8730 goto copy_reloc;
8731 }
8732 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8733 {
8734 /* @local on an ifunc does not really make sense since
8735 the ifunc resolver can take you anywhere. More
8736 seriously, calls to ifuncs must go through a plt call
8737 stub, and for pic the plt call stubs uses r30 to
8738 access the PLT. The problem is that a call that is
8739 local won't have the +32k reloc addend trick marking
8740 -fPIC code, so the linker won't know whether r30 is
8741 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8742 /* xgettext:c-format */
8743 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8744 input_bfd, input_section, rel->r_offset,
8745 h->root.root.string);
8746 }
8747 break;
8748
8749 case R_PPC_DTPREL16:
8750 case R_PPC_DTPREL16_LO:
8751 case R_PPC_DTPREL16_HI:
8752 case R_PPC_DTPREL16_HA:
8753 if (htab->elf.tls_sec != NULL)
8754 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8755 break;
8756
8757 /* Relocations that may need to be propagated if this is a shared
8758 object. */
8759 case R_PPC_TPREL16:
8760 case R_PPC_TPREL16_LO:
8761 case R_PPC_TPREL16_HI:
8762 case R_PPC_TPREL16_HA:
8763 if (h != NULL
8764 && h->root.type == bfd_link_hash_undefweak
8765 && h->dynindx == -1)
8766 {
8767 /* Make this relocation against an undefined weak symbol
8768 resolve to zero. This is really just a tweak, since
8769 code using weak externs ought to check that they are
8770 defined before using them. */
8771 bfd_byte *p = contents + rel->r_offset - d_offset;
8772 unsigned int insn = bfd_get_32 (input_bfd, p);
8773 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8774 if (insn != 0)
8775 bfd_put_32 (input_bfd, insn, p);
8776 break;
8777 }
8778 if (htab->elf.tls_sec != NULL)
8779 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8780 /* The TPREL16 relocs shouldn't really be used in shared
8781 libs as they will result in DT_TEXTREL being set, but
8782 support them anyway. */
8783 goto dodyn;
8784
8785 case R_PPC_TPREL32:
8786 if (htab->elf.tls_sec != NULL)
8787 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8788 goto dodyn;
8789
8790 case R_PPC_DTPREL32:
8791 if (htab->elf.tls_sec != NULL)
8792 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8793 goto dodyn;
8794
8795 case R_PPC_DTPMOD32:
8796 relocation = 1;
8797 addend = 0;
8798 goto dodyn;
8799
8800 case R_PPC_REL16:
8801 case R_PPC_REL16_LO:
8802 case R_PPC_REL16_HI:
8803 case R_PPC_REL16_HA:
8804 case R_PPC_REL16DX_HA:
8805 break;
8806
8807 case R_PPC_REL32:
8808 if (h == NULL || h == htab->elf.hgot)
8809 break;
8810 /* fall through */
8811
8812 case R_PPC_ADDR32:
8813 case R_PPC_ADDR16:
8814 case R_PPC_ADDR16_LO:
8815 case R_PPC_ADDR16_HI:
8816 case R_PPC_ADDR16_HA:
8817 case R_PPC_UADDR32:
8818 case R_PPC_UADDR16:
8819 goto dodyn;
8820
8821 case R_PPC_VLE_REL8:
8822 case R_PPC_VLE_REL15:
8823 case R_PPC_VLE_REL24:
8824 case R_PPC_REL24:
8825 case R_PPC_REL14:
8826 case R_PPC_REL14_BRTAKEN:
8827 case R_PPC_REL14_BRNTAKEN:
8828 /* If these relocations are not to a named symbol, they can be
8829 handled right here, no need to bother the dynamic linker. */
8830 if (SYMBOL_CALLS_LOCAL (info, h)
8831 || h == htab->elf.hgot)
8832 break;
8833 /* fall through */
8834
8835 case R_PPC_ADDR24:
8836 case R_PPC_ADDR14:
8837 case R_PPC_ADDR14_BRTAKEN:
8838 case R_PPC_ADDR14_BRNTAKEN:
8839 if (h != NULL && !bfd_link_pic (info))
8840 break;
8841 /* fall through */
8842
8843 dodyn:
8844 if ((input_section->flags & SEC_ALLOC) == 0
8845 || is_vxworks_tls)
8846 break;
8847
8848 if ((bfd_link_pic (info)
8849 && !(h != NULL
8850 && ((h->root.type == bfd_link_hash_undefined
8851 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8852 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8853 || (h->root.type == bfd_link_hash_undefweak
8854 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8855 && (must_be_dyn_reloc (info, r_type)
8856 || !SYMBOL_CALLS_LOCAL (info, h)))
8857 || (ELIMINATE_COPY_RELOCS
8858 && !bfd_link_pic (info)
8859 && h != NULL
8860 && h->dynindx != -1
8861 && !h->non_got_ref
8862 && !h->def_regular
8863 && !(h->protected_def
8864 && ppc_elf_hash_entry (h)->has_addr16_ha
8865 && ppc_elf_hash_entry (h)->has_addr16_lo
8866 && htab->params->pic_fixup > 0)))
8867 {
8868 int skip;
8869 bfd_byte *loc;
8870 asection *sreloc;
8871 #ifdef DEBUG
8872 fprintf (stderr, "ppc_elf_relocate_section needs to "
8873 "create relocation for %s\n",
8874 (h && h->root.root.string
8875 ? h->root.root.string : "<unknown>"));
8876 #endif
8877
8878 /* When generating a shared object, these relocations
8879 are copied into the output file to be resolved at run
8880 time. */
8881 sreloc = elf_section_data (input_section)->sreloc;
8882 if (ifunc)
8883 sreloc = htab->elf.irelplt;
8884 if (sreloc == NULL)
8885 return FALSE;
8886
8887 skip = 0;
8888 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8889 input_section,
8890 rel->r_offset);
8891 if (outrel.r_offset == (bfd_vma) -1
8892 || outrel.r_offset == (bfd_vma) -2)
8893 skip = (int) outrel.r_offset;
8894 outrel.r_offset += (input_section->output_section->vma
8895 + input_section->output_offset);
8896
8897 if (skip)
8898 memset (&outrel, 0, sizeof outrel);
8899 else if ((h != NULL
8900 && (h->root.type == bfd_link_hash_undefined
8901 || h->root.type == bfd_link_hash_undefweak))
8902 || !SYMBOL_REFERENCES_LOCAL (info, h))
8903 {
8904 BFD_ASSERT (h->dynindx != -1);
8905 unresolved_reloc = FALSE;
8906 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8907 outrel.r_addend = rel->r_addend;
8908 }
8909 else
8910 {
8911 outrel.r_addend = relocation + rel->r_addend;
8912
8913 if (r_type != R_PPC_ADDR32)
8914 {
8915 long indx = 0;
8916
8917 if (ifunc != NULL)
8918 {
8919 /* If we get here when building a static
8920 executable, then the libc startup function
8921 responsible for applying indirect function
8922 relocations is going to complain about
8923 the reloc type.
8924 If we get here when building a dynamic
8925 executable, it will be because we have
8926 a text relocation. The dynamic loader
8927 will set the text segment writable and
8928 non-executable to apply text relocations.
8929 So we'll segfault when trying to run the
8930 indirection function to resolve the reloc. */
8931 info->callbacks->einfo
8932 /* xgettext:c-format */
8933 (_("%P: %H: relocation %s for indirect "
8934 "function %s unsupported\n"),
8935 input_bfd, input_section, rel->r_offset,
8936 howto->name,
8937 sym_name);
8938 ret = FALSE;
8939 }
8940 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8941 ;
8942 else if (sec == NULL || sec->owner == NULL)
8943 {
8944 bfd_set_error (bfd_error_bad_value);
8945 ret = FALSE;
8946 }
8947 else
8948 {
8949 asection *osec;
8950
8951 /* We are turning this relocation into one
8952 against a section symbol. It would be
8953 proper to subtract the symbol's value,
8954 osec->vma, from the emitted reloc addend,
8955 but ld.so expects buggy relocs.
8956 FIXME: Why not always use a zero index? */
8957 osec = sec->output_section;
8958 indx = elf_section_data (osec)->dynindx;
8959 if (indx == 0)
8960 {
8961 osec = htab->elf.text_index_section;
8962 indx = elf_section_data (osec)->dynindx;
8963 }
8964 BFD_ASSERT (indx != 0);
8965 #ifdef DEBUG
8966 if (indx == 0)
8967 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8968 indx, osec->name, osec->flags,
8969 h->root.root.string);
8970 #endif
8971 }
8972
8973 outrel.r_info = ELF32_R_INFO (indx, r_type);
8974 }
8975 else if (ifunc != NULL)
8976 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8977 else
8978 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8979 }
8980
8981 loc = sreloc->contents;
8982 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8983 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8984
8985 if (skip == -1)
8986 goto copy_reloc;
8987
8988 /* This reloc will be computed at runtime. We clear the memory
8989 so that it contains predictable value. */
8990 if (! skip
8991 && ((input_section->flags & SEC_ALLOC) != 0
8992 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8993 {
8994 relocation = howto->pc_relative ? outrel.r_offset : 0;
8995 addend = 0;
8996 break;
8997 }
8998 }
8999 break;
9000
9001 case R_PPC_RELAX_PLT:
9002 case R_PPC_RELAX_PLTREL24:
9003 if (h != NULL)
9004 {
9005 struct plt_entry *ent;
9006 bfd_vma got2_addend = 0;
9007
9008 if (r_type == R_PPC_RELAX_PLTREL24)
9009 {
9010 if (bfd_link_pic (info))
9011 got2_addend = addend;
9012 addend = 0;
9013 }
9014 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9015 if (htab->plt_type == PLT_NEW)
9016 relocation = (htab->glink->output_section->vma
9017 + htab->glink->output_offset
9018 + ent->glink_offset);
9019 else
9020 relocation = (htab->elf.splt->output_section->vma
9021 + htab->elf.splt->output_offset
9022 + ent->plt.offset);
9023 }
9024 /* Fall through. */
9025
9026 case R_PPC_RELAX:
9027 {
9028 const int *stub;
9029 size_t size;
9030 size_t insn_offset = rel->r_offset;
9031 unsigned int insn;
9032
9033 if (bfd_link_pic (info))
9034 {
9035 relocation -= (input_section->output_section->vma
9036 + input_section->output_offset
9037 + rel->r_offset - 4);
9038 stub = shared_stub_entry;
9039 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9040 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9041 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9042 stub += 3;
9043 size = ARRAY_SIZE (shared_stub_entry) - 3;
9044 }
9045 else
9046 {
9047 stub = stub_entry;
9048 size = ARRAY_SIZE (stub_entry);
9049 }
9050
9051 relocation += addend;
9052 if (bfd_link_relocatable (info))
9053 relocation = 0;
9054
9055 /* First insn is HA, second is LO. */
9056 insn = *stub++;
9057 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9058 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9059 insn_offset += 4;
9060
9061 insn = *stub++;
9062 insn |= relocation & 0xffff;
9063 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9064 insn_offset += 4;
9065 size -= 2;
9066
9067 while (size != 0)
9068 {
9069 insn = *stub++;
9070 --size;
9071 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9072 insn_offset += 4;
9073 }
9074
9075 /* Rewrite the reloc and convert one of the trailing nop
9076 relocs to describe this relocation. */
9077 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9078 /* The relocs are at the bottom 2 bytes */
9079 wrel->r_offset = rel->r_offset + d_offset;
9080 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9081 wrel->r_addend = rel->r_addend;
9082 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9083 wrel++, rel++;
9084 wrel->r_offset += 4;
9085 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9086 }
9087 continue;
9088
9089 /* Indirect .sdata relocation. */
9090 case R_PPC_EMB_SDAI16:
9091 BFD_ASSERT (htab->sdata[0].section != NULL);
9092 if (!is_static_defined (htab->sdata[0].sym))
9093 {
9094 unresolved_reloc = TRUE;
9095 break;
9096 }
9097 relocation
9098 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9099 h, relocation, rel);
9100 addend = 0;
9101 break;
9102
9103 /* Indirect .sdata2 relocation. */
9104 case R_PPC_EMB_SDA2I16:
9105 BFD_ASSERT (htab->sdata[1].section != NULL);
9106 if (!is_static_defined (htab->sdata[1].sym))
9107 {
9108 unresolved_reloc = TRUE;
9109 break;
9110 }
9111 relocation
9112 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9113 h, relocation, rel);
9114 addend = 0;
9115 break;
9116
9117 /* Handle the TOC16 reloc. We want to use the offset within the .got
9118 section, not the actual VMA. This is appropriate when generating
9119 an embedded ELF object, for which the .got section acts like the
9120 AIX .toc section. */
9121 case R_PPC_TOC16: /* phony GOT16 relocations */
9122 if (sec == NULL || sec->output_section == NULL)
9123 {
9124 unresolved_reloc = TRUE;
9125 break;
9126 }
9127 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9128 ".got") == 0
9129 || strcmp (bfd_get_section_name (sec->owner, sec),
9130 ".cgot") == 0);
9131
9132 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9133 break;
9134
9135 case R_PPC_PLTREL24:
9136 if (h != NULL && ifunc == NULL)
9137 {
9138 struct plt_entry *ent;
9139
9140 ent = find_plt_ent (&h->plt.plist, got2,
9141 bfd_link_pic (info) ? addend : 0);
9142 if (ent == NULL
9143 || htab->elf.splt == NULL)
9144 {
9145 /* We didn't make a PLT entry for this symbol. This
9146 happens when statically linking PIC code, or when
9147 using -Bsymbolic. */
9148 }
9149 else
9150 {
9151 /* Relocation is to the entry for this symbol in the
9152 procedure linkage table. */
9153 unresolved_reloc = FALSE;
9154 if (htab->plt_type == PLT_NEW)
9155 relocation = (htab->glink->output_section->vma
9156 + htab->glink->output_offset
9157 + ent->glink_offset);
9158 else
9159 relocation = (htab->elf.splt->output_section->vma
9160 + htab->elf.splt->output_offset
9161 + ent->plt.offset);
9162 }
9163 }
9164
9165 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9166 addend specifies the GOT pointer offset within .got2.
9167 Don't apply it to the relocation field. */
9168 addend = 0;
9169 break;
9170
9171 /* Relocate against _SDA_BASE_. */
9172 case R_PPC_SDAREL16:
9173 {
9174 const char *name;
9175 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9176
9177 if (sec == NULL
9178 || sec->output_section == NULL
9179 || !is_static_defined (sda))
9180 {
9181 unresolved_reloc = TRUE;
9182 break;
9183 }
9184 addend -= SYM_VAL (sda);
9185
9186 name = bfd_get_section_name (output_bfd, sec->output_section);
9187 if (!(strcmp (name, ".sdata") == 0
9188 || strcmp (name, ".sbss") == 0))
9189 {
9190 info->callbacks->einfo
9191 /* xgettext:c-format */
9192 (_("%P: %B: the target (%s) of a %s relocation is "
9193 "in the wrong output section (%s)\n"),
9194 input_bfd,
9195 sym_name,
9196 howto->name,
9197 name);
9198 }
9199 }
9200 break;
9201
9202 /* Relocate against _SDA2_BASE_. */
9203 case R_PPC_EMB_SDA2REL:
9204 {
9205 const char *name;
9206 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9207
9208 if (sec == NULL
9209 || sec->output_section == NULL
9210 || !is_static_defined (sda))
9211 {
9212 unresolved_reloc = TRUE;
9213 break;
9214 }
9215 addend -= SYM_VAL (sda);
9216
9217 name = bfd_get_section_name (output_bfd, sec->output_section);
9218 if (!(strcmp (name, ".sdata2") == 0
9219 || strcmp (name, ".sbss2") == 0))
9220 {
9221 info->callbacks->einfo
9222 /* xgettext:c-format */
9223 (_("%P: %B: the target (%s) of a %s relocation is "
9224 "in the wrong output section (%s)\n"),
9225 input_bfd,
9226 sym_name,
9227 howto->name,
9228 name);
9229 }
9230 }
9231 break;
9232
9233 case R_PPC_VLE_LO16A:
9234 relocation = relocation + addend;
9235 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9236 contents + rel->r_offset, relocation,
9237 split16a_type, htab->params->vle_reloc_fixup);
9238 goto copy_reloc;
9239
9240 case R_PPC_VLE_LO16D:
9241 relocation = relocation + addend;
9242 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9243 contents + rel->r_offset, relocation,
9244 split16d_type, htab->params->vle_reloc_fixup);
9245 goto copy_reloc;
9246
9247 case R_PPC_VLE_HI16A:
9248 relocation = (relocation + addend) >> 16;
9249 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9250 contents + rel->r_offset, relocation,
9251 split16a_type, htab->params->vle_reloc_fixup);
9252 goto copy_reloc;
9253
9254 case R_PPC_VLE_HI16D:
9255 relocation = (relocation + addend) >> 16;
9256 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9257 contents + rel->r_offset, relocation,
9258 split16d_type, htab->params->vle_reloc_fixup);
9259 goto copy_reloc;
9260
9261 case R_PPC_VLE_HA16A:
9262 relocation = (relocation + addend + 0x8000) >> 16;
9263 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9264 contents + rel->r_offset, relocation,
9265 split16a_type, htab->params->vle_reloc_fixup);
9266 goto copy_reloc;
9267
9268 case R_PPC_VLE_HA16D:
9269 relocation = (relocation + addend + 0x8000) >> 16;
9270 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9271 contents + rel->r_offset, relocation,
9272 split16d_type, htab->params->vle_reloc_fixup);
9273 goto copy_reloc;
9274
9275 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9276 case R_PPC_EMB_SDA21:
9277 case R_PPC_VLE_SDA21:
9278 case R_PPC_EMB_RELSDA:
9279 case R_PPC_VLE_SDA21_LO:
9280 {
9281 const char *name;
9282 int reg;
9283 unsigned int insn;
9284 struct elf_link_hash_entry *sda = NULL;
9285
9286 if (sec == NULL || sec->output_section == NULL)
9287 {
9288 unresolved_reloc = TRUE;
9289 break;
9290 }
9291
9292 name = bfd_get_section_name (output_bfd, sec->output_section);
9293 if (strcmp (name, ".sdata") == 0
9294 || strcmp (name, ".sbss") == 0)
9295 {
9296 reg = 13;
9297 sda = htab->sdata[0].sym;
9298 }
9299 else if (strcmp (name, ".sdata2") == 0
9300 || strcmp (name, ".sbss2") == 0)
9301 {
9302 reg = 2;
9303 sda = htab->sdata[1].sym;
9304 }
9305 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9306 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9307 {
9308 reg = 0;
9309 }
9310 else
9311 {
9312 info->callbacks->einfo
9313 /* xgettext:c-format */
9314 (_("%P: %B: the target (%s) of a %s relocation is "
9315 "in the wrong output section (%s)\n"),
9316 input_bfd,
9317 sym_name,
9318 howto->name,
9319 name);
9320
9321 bfd_set_error (bfd_error_bad_value);
9322 ret = FALSE;
9323 goto copy_reloc;
9324 }
9325
9326 if (sda != NULL)
9327 {
9328 if (!is_static_defined (sda))
9329 {
9330 unresolved_reloc = TRUE;
9331 break;
9332 }
9333 addend -= SYM_VAL (sda);
9334 }
9335
9336 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9337 if (reg == 0
9338 && (r_type == R_PPC_VLE_SDA21
9339 || r_type == R_PPC_VLE_SDA21_LO))
9340 {
9341 relocation = relocation + addend;
9342 addend = 0;
9343
9344 /* Force e_li insn, keeping RT from original insn. */
9345 insn &= 0x1f << 21;
9346 insn |= 28u << 26;
9347
9348 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9349 /* Top 4 bits of value to 17..20. */
9350 insn |= (relocation & 0xf0000) >> 5;
9351 /* Next 5 bits of the value to 11..15. */
9352 insn |= (relocation & 0xf800) << 5;
9353 /* And the final 11 bits of the value to bits 21 to 31. */
9354 insn |= relocation & 0x7ff;
9355
9356 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9357
9358 if (r_type == R_PPC_VLE_SDA21
9359 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9360 goto overflow;
9361 goto copy_reloc;
9362 }
9363 else if (r_type == R_PPC_EMB_SDA21
9364 || r_type == R_PPC_VLE_SDA21
9365 || r_type == R_PPC_VLE_SDA21_LO)
9366 {
9367 /* Fill in register field. */
9368 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9369 }
9370 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9371 }
9372 break;
9373
9374 case R_PPC_VLE_SDAREL_LO16A:
9375 case R_PPC_VLE_SDAREL_LO16D:
9376 case R_PPC_VLE_SDAREL_HI16A:
9377 case R_PPC_VLE_SDAREL_HI16D:
9378 case R_PPC_VLE_SDAREL_HA16A:
9379 case R_PPC_VLE_SDAREL_HA16D:
9380 {
9381 bfd_vma value;
9382 const char *name;
9383 //int reg;
9384 struct elf_link_hash_entry *sda = NULL;
9385
9386 if (sec == NULL || sec->output_section == NULL)
9387 {
9388 unresolved_reloc = TRUE;
9389 break;
9390 }
9391
9392 name = bfd_get_section_name (output_bfd, sec->output_section);
9393 if (strcmp (name, ".sdata") == 0
9394 || strcmp (name, ".sbss") == 0)
9395 {
9396 //reg = 13;
9397 sda = htab->sdata[0].sym;
9398 }
9399 else if (strcmp (name, ".sdata2") == 0
9400 || strcmp (name, ".sbss2") == 0)
9401 {
9402 //reg = 2;
9403 sda = htab->sdata[1].sym;
9404 }
9405 else
9406 {
9407 _bfd_error_handler
9408 /* xgettext:c-format */
9409 (_("%B: the target (%s) of a %s relocation is "
9410 "in the wrong output section (%s)"),
9411 input_bfd,
9412 sym_name,
9413 howto->name,
9414 name);
9415
9416 bfd_set_error (bfd_error_bad_value);
9417 ret = FALSE;
9418 goto copy_reloc;
9419 }
9420
9421 if (sda != NULL)
9422 {
9423 if (!is_static_defined (sda))
9424 {
9425 unresolved_reloc = TRUE;
9426 break;
9427 }
9428 }
9429
9430 value = (sda->root.u.def.section->output_section->vma
9431 + sda->root.u.def.section->output_offset
9432 + addend);
9433
9434 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9435 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9436 contents + rel->r_offset, value,
9437 split16a_type,
9438 htab->params->vle_reloc_fixup);
9439 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9440 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9441 contents + rel->r_offset, value,
9442 split16d_type,
9443 htab->params->vle_reloc_fixup);
9444 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9445 {
9446 value = value >> 16;
9447 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9448 contents + rel->r_offset, value,
9449 split16a_type,
9450 htab->params->vle_reloc_fixup);
9451 }
9452 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9453 {
9454 value = value >> 16;
9455 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9456 contents + rel->r_offset, value,
9457 split16d_type,
9458 htab->params->vle_reloc_fixup);
9459 }
9460 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9461 {
9462 value = (value + 0x8000) >> 16;
9463 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9464 contents + rel->r_offset, value,
9465 split16a_type,
9466 htab->params->vle_reloc_fixup);
9467 }
9468 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
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 split16d_type,
9474 htab->params->vle_reloc_fixup);
9475 }
9476 }
9477 goto copy_reloc;
9478
9479 /* Relocate against the beginning of the section. */
9480 case R_PPC_SECTOFF:
9481 case R_PPC_SECTOFF_LO:
9482 case R_PPC_SECTOFF_HI:
9483 case R_PPC_SECTOFF_HA:
9484 if (sec == NULL || sec->output_section == NULL)
9485 {
9486 unresolved_reloc = TRUE;
9487 break;
9488 }
9489 addend -= sec->output_section->vma;
9490 break;
9491
9492 /* Negative relocations. */
9493 case R_PPC_EMB_NADDR32:
9494 case R_PPC_EMB_NADDR16:
9495 case R_PPC_EMB_NADDR16_LO:
9496 case R_PPC_EMB_NADDR16_HI:
9497 case R_PPC_EMB_NADDR16_HA:
9498 addend -= 2 * relocation;
9499 break;
9500
9501 case R_PPC_COPY:
9502 case R_PPC_GLOB_DAT:
9503 case R_PPC_JMP_SLOT:
9504 case R_PPC_RELATIVE:
9505 case R_PPC_IRELATIVE:
9506 case R_PPC_PLT32:
9507 case R_PPC_PLTREL32:
9508 case R_PPC_PLT16_LO:
9509 case R_PPC_PLT16_HI:
9510 case R_PPC_PLT16_HA:
9511 case R_PPC_ADDR30:
9512 case R_PPC_EMB_RELSEC16:
9513 case R_PPC_EMB_RELST_LO:
9514 case R_PPC_EMB_RELST_HI:
9515 case R_PPC_EMB_RELST_HA:
9516 case R_PPC_EMB_BIT_FLD:
9517 info->callbacks->einfo
9518 /* xgettext:c-format */
9519 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9520 input_bfd,
9521 howto->name,
9522 sym_name);
9523
9524 bfd_set_error (bfd_error_invalid_operation);
9525 ret = FALSE;
9526 goto copy_reloc;
9527 }
9528
9529 /* Do any further special processing. */
9530 switch (r_type)
9531 {
9532 default:
9533 break;
9534
9535 case R_PPC_ADDR16_HA:
9536 case R_PPC_REL16_HA:
9537 case R_PPC_REL16DX_HA:
9538 case R_PPC_SECTOFF_HA:
9539 case R_PPC_TPREL16_HA:
9540 case R_PPC_DTPREL16_HA:
9541 case R_PPC_EMB_NADDR16_HA:
9542 case R_PPC_EMB_RELST_HA:
9543 /* It's just possible that this symbol is a weak symbol
9544 that's not actually defined anywhere. In that case,
9545 'sec' would be NULL, and we should leave the symbol
9546 alone (it will be set to zero elsewhere in the link). */
9547 if (sec == NULL)
9548 break;
9549 /* Fall through. */
9550
9551 case R_PPC_PLT16_HA:
9552 case R_PPC_GOT16_HA:
9553 case R_PPC_GOT_TLSGD16_HA:
9554 case R_PPC_GOT_TLSLD16_HA:
9555 case R_PPC_GOT_TPREL16_HA:
9556 case R_PPC_GOT_DTPREL16_HA:
9557 /* Add 0x10000 if sign bit in 0:15 is set.
9558 Bits 0:15 are not used. */
9559 addend += 0x8000;
9560 break;
9561
9562 case R_PPC_ADDR16:
9563 case R_PPC_ADDR16_LO:
9564 case R_PPC_GOT16:
9565 case R_PPC_GOT16_LO:
9566 case R_PPC_SDAREL16:
9567 case R_PPC_SECTOFF:
9568 case R_PPC_SECTOFF_LO:
9569 case R_PPC_DTPREL16:
9570 case R_PPC_DTPREL16_LO:
9571 case R_PPC_TPREL16:
9572 case R_PPC_TPREL16_LO:
9573 case R_PPC_GOT_TLSGD16:
9574 case R_PPC_GOT_TLSGD16_LO:
9575 case R_PPC_GOT_TLSLD16:
9576 case R_PPC_GOT_TLSLD16_LO:
9577 case R_PPC_GOT_DTPREL16:
9578 case R_PPC_GOT_DTPREL16_LO:
9579 case R_PPC_GOT_TPREL16:
9580 case R_PPC_GOT_TPREL16_LO:
9581 {
9582 /* The 32-bit ABI lacks proper relocations to deal with
9583 certain 64-bit instructions. Prevent damage to bits
9584 that make up part of the insn opcode. */
9585 unsigned int insn, mask, lobit;
9586
9587 insn = bfd_get_32 (input_bfd,
9588 contents + rel->r_offset - d_offset);
9589 mask = 0;
9590 if (is_insn_ds_form (insn))
9591 mask = 3;
9592 else if (is_insn_dq_form (insn))
9593 mask = 15;
9594 else
9595 break;
9596 relocation += addend;
9597 addend = insn & mask;
9598 lobit = mask & relocation;
9599 if (lobit != 0)
9600 {
9601 relocation ^= lobit;
9602 info->callbacks->einfo
9603 /* xgettext:c-format */
9604 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9605 input_bfd, input_section, rel->r_offset,
9606 howto->name, sym_name, mask + 1);
9607 bfd_set_error (bfd_error_bad_value);
9608 ret = FALSE;
9609 }
9610 }
9611 break;
9612 }
9613
9614 #ifdef DEBUG
9615 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9616 "offset = %ld, addend = %ld\n",
9617 howto->name,
9618 (int) r_type,
9619 sym_name,
9620 r_symndx,
9621 (long) rel->r_offset,
9622 (long) addend);
9623 #endif
9624
9625 if (unresolved_reloc
9626 && !((input_section->flags & SEC_DEBUGGING) != 0
9627 && h->def_dynamic)
9628 && _bfd_elf_section_offset (output_bfd, info, input_section,
9629 rel->r_offset) != (bfd_vma) -1)
9630 {
9631 info->callbacks->einfo
9632 /* xgettext:c-format */
9633 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9634 input_bfd, input_section, rel->r_offset,
9635 howto->name,
9636 sym_name);
9637 ret = FALSE;
9638 }
9639
9640 /* 16-bit fields in insns mostly have signed values, but a
9641 few insns have 16-bit unsigned values. Really, we should
9642 have different reloc types. */
9643 if (howto->complain_on_overflow != complain_overflow_dont
9644 && howto->dst_mask == 0xffff
9645 && (input_section->flags & SEC_CODE) != 0)
9646 {
9647 enum complain_overflow complain = complain_overflow_signed;
9648
9649 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9650 {
9651 unsigned int insn;
9652
9653 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9654 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9655 complain = complain_overflow_bitfield;
9656 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9657 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9658 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9659 complain = complain_overflow_unsigned;
9660 }
9661 if (howto->complain_on_overflow != complain)
9662 {
9663 alt_howto = *howto;
9664 alt_howto.complain_on_overflow = complain;
9665 howto = &alt_howto;
9666 }
9667 }
9668
9669 if (r_type == R_PPC_REL16DX_HA)
9670 {
9671 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9672 if (rel->r_offset + 4 > input_section->size)
9673 r = bfd_reloc_outofrange;
9674 else
9675 {
9676 unsigned int insn;
9677
9678 relocation += addend;
9679 relocation -= (rel->r_offset
9680 + input_section->output_offset
9681 + input_section->output_section->vma);
9682 relocation >>= 16;
9683 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9684 insn &= ~0x1fffc1;
9685 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9686 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9687 r = bfd_reloc_ok;
9688 }
9689 }
9690 else
9691 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9692 rel->r_offset, relocation, addend);
9693
9694 if (r != bfd_reloc_ok)
9695 {
9696 if (r == bfd_reloc_overflow)
9697 {
9698 overflow:
9699 /* On code like "if (foo) foo();" don't report overflow
9700 on a branch to zero when foo is undefined. */
9701 if (!warned
9702 && !(h != NULL
9703 && (h->root.type == bfd_link_hash_undefweak
9704 || h->root.type == bfd_link_hash_undefined)
9705 && is_branch_reloc (r_type)))
9706 info->callbacks->reloc_overflow
9707 (info, (h ? &h->root : NULL), sym_name, howto->name,
9708 rel->r_addend, input_bfd, input_section, rel->r_offset);
9709 }
9710 else
9711 {
9712 info->callbacks->einfo
9713 /* xgettext:c-format */
9714 (_("%P: %H: %s reloc against `%s': error %d\n"),
9715 input_bfd, input_section, rel->r_offset,
9716 howto->name, sym_name, (int) r);
9717 ret = FALSE;
9718 }
9719 }
9720 copy_reloc:
9721 if (wrel != rel)
9722 *wrel = *rel;
9723 }
9724
9725 if (wrel != rel)
9726 {
9727 Elf_Internal_Shdr *rel_hdr;
9728 size_t deleted = rel - wrel;
9729
9730 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9731 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9732 if (rel_hdr->sh_size == 0)
9733 {
9734 /* It is too late to remove an empty reloc section. Leave
9735 one NONE reloc.
9736 ??? What is wrong with an empty section??? */
9737 rel_hdr->sh_size = rel_hdr->sh_entsize;
9738 deleted -= 1;
9739 wrel++;
9740 }
9741 relend = wrel;
9742 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9743 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9744 input_section->reloc_count -= deleted;
9745 }
9746
9747 #ifdef DEBUG
9748 fprintf (stderr, "\n");
9749 #endif
9750
9751 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9752 && input_section->size != input_section->rawsize
9753 && (strcmp (input_section->output_section->name, ".init") == 0
9754 || strcmp (input_section->output_section->name, ".fini") == 0))
9755 {
9756 /* Branch around the trampolines. */
9757 unsigned int insn = B + input_section->size - input_section->rawsize;
9758 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9759 }
9760
9761 if (htab->params->ppc476_workaround
9762 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9763 && (!bfd_link_relocatable (info)
9764 || (input_section->output_section->alignment_power
9765 >= htab->params->pagesize_p2)))
9766 {
9767 bfd_vma start_addr, end_addr, addr;
9768 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9769
9770 if (relax_info->workaround_size != 0)
9771 {
9772 bfd_byte *p;
9773 unsigned int n;
9774 bfd_byte fill[4];
9775
9776 bfd_put_32 (input_bfd, BA, fill);
9777 p = contents + input_section->size - relax_info->workaround_size;
9778 n = relax_info->workaround_size >> 2;
9779 while (n--)
9780 {
9781 memcpy (p, fill, 4);
9782 p += 4;
9783 }
9784 }
9785
9786 /* The idea is: Replace the last instruction on a page with a
9787 branch to a patch area. Put the insn there followed by a
9788 branch back to the next page. Complicated a little by
9789 needing to handle moved conditional branches, and by not
9790 wanting to touch data-in-text. */
9791
9792 start_addr = (input_section->output_section->vma
9793 + input_section->output_offset);
9794 end_addr = (start_addr + input_section->size
9795 - relax_info->workaround_size);
9796 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9797 addr < end_addr;
9798 addr += pagesize)
9799 {
9800 bfd_vma offset = addr - start_addr;
9801 Elf_Internal_Rela *lo, *hi;
9802 bfd_boolean is_data;
9803 bfd_vma patch_off, patch_addr;
9804 unsigned int insn;
9805
9806 /* Do we have a data reloc at this offset? If so, leave
9807 the word alone. */
9808 is_data = FALSE;
9809 lo = relocs;
9810 hi = relend;
9811 rel = NULL;
9812 while (lo < hi)
9813 {
9814 rel = lo + (hi - lo) / 2;
9815 if (rel->r_offset < offset)
9816 lo = rel + 1;
9817 else if (rel->r_offset > offset + 3)
9818 hi = rel;
9819 else
9820 {
9821 switch (ELF32_R_TYPE (rel->r_info))
9822 {
9823 case R_PPC_ADDR32:
9824 case R_PPC_UADDR32:
9825 case R_PPC_REL32:
9826 case R_PPC_ADDR30:
9827 is_data = TRUE;
9828 break;
9829 default:
9830 break;
9831 }
9832 break;
9833 }
9834 }
9835 if (is_data)
9836 continue;
9837
9838 /* Some instructions can be left alone too. Unconditional
9839 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9840 avoid the icache failure.
9841
9842 The problem occurs due to prefetch across a page boundary
9843 where stale instructions can be fetched from the next
9844 page, and the mechanism for flushing these bad
9845 instructions fails under certain circumstances. The
9846 unconditional branches:
9847 1) Branch: b, bl, ba, bla,
9848 2) Branch Conditional: bc, bca, bcl, bcla,
9849 3) Branch Conditional to Link Register: bclr, bclrl,
9850 where (2) and (3) have BO=0x14 making them unconditional,
9851 prevent the bad prefetch because the prefetch itself is
9852 affected by these instructions. This happens even if the
9853 instruction is not executed.
9854
9855 A bctr example:
9856 .
9857 . lis 9,new_page@ha
9858 . addi 9,9,new_page@l
9859 . mtctr 9
9860 . bctr
9861 . nop
9862 . nop
9863 . new_page:
9864 .
9865 The bctr is not predicted taken due to ctr not being
9866 ready, so prefetch continues on past the bctr into the
9867 new page which might have stale instructions. If they
9868 fail to be flushed, then they will be executed after the
9869 bctr executes. Either of the following modifications
9870 prevent the bad prefetch from happening in the first
9871 place:
9872 .
9873 . lis 9,new_page@ha lis 9,new_page@ha
9874 . addi 9,9,new_page@l addi 9,9,new_page@l
9875 . mtctr 9 mtctr 9
9876 . bctr bctr
9877 . nop b somewhere_else
9878 . b somewhere_else nop
9879 . new_page: new_page:
9880 . */
9881 insn = bfd_get_32 (input_bfd, contents + offset);
9882 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9883 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9884 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9885 || ((insn & (0x3f << 26)) == (19u << 26)
9886 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9887 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9888 continue;
9889
9890 patch_addr = (start_addr + input_section->size
9891 - relax_info->workaround_size);
9892 patch_addr = (patch_addr + 15) & -16;
9893 patch_off = patch_addr - start_addr;
9894 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9895
9896 if (rel != NULL
9897 && rel->r_offset >= offset
9898 && rel->r_offset < offset + 4)
9899 {
9900 asection *sreloc;
9901
9902 /* If the insn we are patching had a reloc, adjust the
9903 reloc r_offset so that the reloc applies to the moved
9904 location. This matters for -r and --emit-relocs. */
9905 if (rel + 1 != relend)
9906 {
9907 Elf_Internal_Rela tmp = *rel;
9908
9909 /* Keep the relocs sorted by r_offset. */
9910 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9911 relend[-1] = tmp;
9912 }
9913 relend[-1].r_offset += patch_off - offset;
9914
9915 /* Adjust REL16 addends too. */
9916 switch (ELF32_R_TYPE (relend[-1].r_info))
9917 {
9918 case R_PPC_REL16:
9919 case R_PPC_REL16_LO:
9920 case R_PPC_REL16_HI:
9921 case R_PPC_REL16_HA:
9922 relend[-1].r_addend += patch_off - offset;
9923 break;
9924 default:
9925 break;
9926 }
9927
9928 /* If we are building a PIE or shared library with
9929 non-PIC objects, perhaps we had a dynamic reloc too?
9930 If so, the dynamic reloc must move with the insn. */
9931 sreloc = elf_section_data (input_section)->sreloc;
9932 if (sreloc != NULL)
9933 {
9934 Elf32_External_Rela *slo, *shi, *srelend;
9935 bfd_vma soffset;
9936
9937 slo = (Elf32_External_Rela *) sreloc->contents;
9938 shi = srelend = slo + sreloc->reloc_count;
9939 soffset = (offset + input_section->output_section->vma
9940 + input_section->output_offset);
9941 while (slo < shi)
9942 {
9943 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9944 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9945 &outrel);
9946 if (outrel.r_offset < soffset)
9947 slo = srel + 1;
9948 else if (outrel.r_offset > soffset + 3)
9949 shi = srel;
9950 else
9951 {
9952 if (srel + 1 != srelend)
9953 {
9954 memmove (srel, srel + 1,
9955 (srelend - (srel + 1)) * sizeof (*srel));
9956 srel = srelend - 1;
9957 }
9958 outrel.r_offset += patch_off - offset;
9959 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9960 (bfd_byte *) srel);
9961 break;
9962 }
9963 }
9964 }
9965 }
9966 else
9967 rel = NULL;
9968
9969 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9970 && (insn & 2) == 0 /* relative */)
9971 {
9972 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9973
9974 delta += offset - patch_off;
9975 if (bfd_link_relocatable (info) && rel != NULL)
9976 delta = 0;
9977 if (!bfd_link_relocatable (info) && rel != NULL)
9978 {
9979 enum elf_ppc_reloc_type r_type;
9980
9981 r_type = ELF32_R_TYPE (relend[-1].r_info);
9982 if (r_type == R_PPC_REL14_BRTAKEN)
9983 insn |= BRANCH_PREDICT_BIT;
9984 else if (r_type == R_PPC_REL14_BRNTAKEN)
9985 insn &= ~BRANCH_PREDICT_BIT;
9986 else
9987 BFD_ASSERT (r_type == R_PPC_REL14);
9988
9989 if ((r_type == R_PPC_REL14_BRTAKEN
9990 || r_type == R_PPC_REL14_BRNTAKEN)
9991 && delta + 0x8000 < 0x10000
9992 && (bfd_signed_vma) delta < 0)
9993 insn ^= BRANCH_PREDICT_BIT;
9994 }
9995 if (delta + 0x8000 < 0x10000)
9996 {
9997 bfd_put_32 (input_bfd,
9998 (insn & ~0xfffc) | (delta & 0xfffc),
9999 contents + patch_off);
10000 patch_off += 4;
10001 bfd_put_32 (input_bfd,
10002 B | ((offset + 4 - patch_off) & 0x3fffffc),
10003 contents + patch_off);
10004 patch_off += 4;
10005 }
10006 else
10007 {
10008 if (rel != NULL)
10009 {
10010 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10011
10012 relend[-1].r_offset += 8;
10013 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10014 }
10015 bfd_put_32 (input_bfd,
10016 (insn & ~0xfffc) | 8,
10017 contents + patch_off);
10018 patch_off += 4;
10019 bfd_put_32 (input_bfd,
10020 B | ((offset + 4 - patch_off) & 0x3fffffc),
10021 contents + patch_off);
10022 patch_off += 4;
10023 bfd_put_32 (input_bfd,
10024 B | ((delta - 8) & 0x3fffffc),
10025 contents + patch_off);
10026 patch_off += 4;
10027 }
10028 }
10029 else
10030 {
10031 bfd_put_32 (input_bfd, insn, contents + patch_off);
10032 patch_off += 4;
10033 bfd_put_32 (input_bfd,
10034 B | ((offset + 4 - patch_off) & 0x3fffffc),
10035 contents + patch_off);
10036 patch_off += 4;
10037 }
10038 BFD_ASSERT (patch_off <= input_section->size);
10039 relax_info->workaround_size = input_section->size - patch_off;
10040 }
10041 }
10042
10043 return ret;
10044 }
10045 \f
10046 /* Finish up dynamic symbol handling. We set the contents of various
10047 dynamic sections here. */
10048
10049 static bfd_boolean
10050 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10051 struct bfd_link_info *info,
10052 struct elf_link_hash_entry *h,
10053 Elf_Internal_Sym *sym)
10054 {
10055 struct ppc_elf_link_hash_table *htab;
10056 struct plt_entry *ent;
10057 bfd_boolean doneone;
10058
10059 #ifdef DEBUG
10060 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10061 h->root.root.string);
10062 #endif
10063
10064 htab = ppc_elf_hash_table (info);
10065 BFD_ASSERT (htab->elf.dynobj != NULL);
10066
10067 doneone = FALSE;
10068 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10069 if (ent->plt.offset != (bfd_vma) -1)
10070 {
10071 if (!doneone)
10072 {
10073 Elf_Internal_Rela rela;
10074 bfd_byte *loc;
10075 bfd_vma reloc_index;
10076
10077 if (htab->plt_type == PLT_NEW
10078 || !htab->elf.dynamic_sections_created
10079 || h->dynindx == -1)
10080 reloc_index = ent->plt.offset / 4;
10081 else
10082 {
10083 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10084 / htab->plt_slot_size);
10085 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10086 && htab->plt_type == PLT_OLD)
10087 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10088 }
10089
10090 /* This symbol has an entry in the procedure linkage table.
10091 Set it up. */
10092 if (htab->plt_type == PLT_VXWORKS
10093 && htab->elf.dynamic_sections_created
10094 && h->dynindx != -1)
10095 {
10096 bfd_vma got_offset;
10097 const bfd_vma *plt_entry;
10098
10099 /* The first three entries in .got.plt are reserved. */
10100 got_offset = (reloc_index + 3) * 4;
10101
10102 /* Use the right PLT. */
10103 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10104 : ppc_elf_vxworks_plt_entry;
10105
10106 /* Fill in the .plt on VxWorks. */
10107 if (bfd_link_pic (info))
10108 {
10109 bfd_put_32 (output_bfd,
10110 plt_entry[0] | PPC_HA (got_offset),
10111 htab->elf.splt->contents + ent->plt.offset + 0);
10112 bfd_put_32 (output_bfd,
10113 plt_entry[1] | PPC_LO (got_offset),
10114 htab->elf.splt->contents + ent->plt.offset + 4);
10115 }
10116 else
10117 {
10118 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10119
10120 bfd_put_32 (output_bfd,
10121 plt_entry[0] | PPC_HA (got_loc),
10122 htab->elf.splt->contents + ent->plt.offset + 0);
10123 bfd_put_32 (output_bfd,
10124 plt_entry[1] | PPC_LO (got_loc),
10125 htab->elf.splt->contents + ent->plt.offset + 4);
10126 }
10127
10128 bfd_put_32 (output_bfd, plt_entry[2],
10129 htab->elf.splt->contents + ent->plt.offset + 8);
10130 bfd_put_32 (output_bfd, plt_entry[3],
10131 htab->elf.splt->contents + ent->plt.offset + 12);
10132
10133 /* This instruction is an immediate load. The value loaded is
10134 the byte offset of the R_PPC_JMP_SLOT relocation from the
10135 start of the .rela.plt section. The value is stored in the
10136 low-order 16 bits of the load instruction. */
10137 /* NOTE: It appears that this is now an index rather than a
10138 prescaled offset. */
10139 bfd_put_32 (output_bfd,
10140 plt_entry[4] | reloc_index,
10141 htab->elf.splt->contents + ent->plt.offset + 16);
10142 /* This instruction is a PC-relative branch whose target is
10143 the start of the PLT section. The address of this branch
10144 instruction is 20 bytes beyond the start of this PLT entry.
10145 The address is encoded in bits 6-29, inclusive. The value
10146 stored is right-shifted by two bits, permitting a 26-bit
10147 offset. */
10148 bfd_put_32 (output_bfd,
10149 (plt_entry[5]
10150 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10151 htab->elf.splt->contents + ent->plt.offset + 20);
10152 bfd_put_32 (output_bfd, plt_entry[6],
10153 htab->elf.splt->contents + ent->plt.offset + 24);
10154 bfd_put_32 (output_bfd, plt_entry[7],
10155 htab->elf.splt->contents + ent->plt.offset + 28);
10156
10157 /* Fill in the GOT entry corresponding to this PLT slot with
10158 the address immediately after the "bctr" instruction
10159 in this PLT entry. */
10160 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10161 + htab->elf.splt->output_offset
10162 + ent->plt.offset + 16),
10163 htab->elf.sgotplt->contents + got_offset);
10164
10165 if (!bfd_link_pic (info))
10166 {
10167 /* Fill in a couple of entries in .rela.plt.unloaded. */
10168 loc = htab->srelplt2->contents
10169 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10170 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10171 * sizeof (Elf32_External_Rela));
10172
10173 /* Provide the @ha relocation for the first instruction. */
10174 rela.r_offset = (htab->elf.splt->output_section->vma
10175 + htab->elf.splt->output_offset
10176 + ent->plt.offset + 2);
10177 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10178 R_PPC_ADDR16_HA);
10179 rela.r_addend = got_offset;
10180 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10181 loc += sizeof (Elf32_External_Rela);
10182
10183 /* Provide the @l relocation for the second instruction. */
10184 rela.r_offset = (htab->elf.splt->output_section->vma
10185 + htab->elf.splt->output_offset
10186 + ent->plt.offset + 6);
10187 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10188 R_PPC_ADDR16_LO);
10189 rela.r_addend = got_offset;
10190 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10191 loc += sizeof (Elf32_External_Rela);
10192
10193 /* Provide a relocation for the GOT entry corresponding to this
10194 PLT slot. Point it at the middle of the .plt entry. */
10195 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10196 + htab->elf.sgotplt->output_offset
10197 + got_offset);
10198 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10199 R_PPC_ADDR32);
10200 rela.r_addend = ent->plt.offset + 16;
10201 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10202 }
10203
10204 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10205 In particular, the offset for the relocation is not the
10206 address of the PLT entry for this function, as specified
10207 by the ABI. Instead, the offset is set to the address of
10208 the GOT slot for this function. See EABI 4.4.4.1. */
10209 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10210 + htab->elf.sgotplt->output_offset
10211 + got_offset);
10212
10213 }
10214 else
10215 {
10216 asection *splt = htab->elf.splt;
10217 if (!htab->elf.dynamic_sections_created
10218 || h->dynindx == -1)
10219 splt = htab->elf.iplt;
10220
10221 rela.r_offset = (splt->output_section->vma
10222 + splt->output_offset
10223 + ent->plt.offset);
10224 if (htab->plt_type == PLT_OLD
10225 || !htab->elf.dynamic_sections_created
10226 || h->dynindx == -1)
10227 {
10228 /* We don't need to fill in the .plt. The ppc dynamic
10229 linker will fill it in. */
10230 }
10231 else
10232 {
10233 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10234 + htab->glink->output_section->vma
10235 + htab->glink->output_offset);
10236 bfd_put_32 (output_bfd, val,
10237 splt->contents + ent->plt.offset);
10238 }
10239 }
10240
10241 /* Fill in the entry in the .rela.plt section. */
10242 rela.r_addend = 0;
10243 if (!htab->elf.dynamic_sections_created
10244 || h->dynindx == -1)
10245 {
10246 BFD_ASSERT (h->type == STT_GNU_IFUNC
10247 && h->def_regular
10248 && (h->root.type == bfd_link_hash_defined
10249 || h->root.type == bfd_link_hash_defweak));
10250 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10251 rela.r_addend = SYM_VAL (h);
10252 }
10253 else
10254 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10255
10256 if (!htab->elf.dynamic_sections_created
10257 || h->dynindx == -1)
10258 loc = (htab->elf.irelplt->contents
10259 + (htab->elf.irelplt->reloc_count++
10260 * sizeof (Elf32_External_Rela)));
10261 else
10262 loc = (htab->elf.srelplt->contents
10263 + reloc_index * sizeof (Elf32_External_Rela));
10264 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10265
10266 if (!h->def_regular)
10267 {
10268 /* Mark the symbol as undefined, rather than as
10269 defined in the .plt section. Leave the value if
10270 there were any relocations where pointer equality
10271 matters (this is a clue for the dynamic linker, to
10272 make function pointer comparisons work between an
10273 application and shared library), otherwise set it
10274 to zero. */
10275 sym->st_shndx = SHN_UNDEF;
10276 if (!h->pointer_equality_needed)
10277 sym->st_value = 0;
10278 else if (!h->ref_regular_nonweak)
10279 {
10280 /* This breaks function pointer comparisons, but
10281 that is better than breaking tests for a NULL
10282 function pointer. */
10283 sym->st_value = 0;
10284 }
10285 }
10286 else if (h->type == STT_GNU_IFUNC
10287 && !bfd_link_pic (info))
10288 {
10289 /* Set the value of ifunc symbols in a non-pie
10290 executable to the glink entry. This is to avoid
10291 text relocations. We can't do this for ifunc in
10292 allocate_dynrelocs, as we do for normal dynamic
10293 function symbols with plt entries, because we need
10294 to keep the original value around for the ifunc
10295 relocation. */
10296 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10297 (output_bfd, htab->glink->output_section));
10298 sym->st_value = (ent->glink_offset
10299 + htab->glink->output_offset
10300 + htab->glink->output_section->vma);
10301 }
10302 doneone = TRUE;
10303 }
10304
10305 if (htab->plt_type == PLT_NEW
10306 || !htab->elf.dynamic_sections_created
10307 || h->dynindx == -1)
10308 {
10309 unsigned char *p;
10310 asection *splt = htab->elf.splt;
10311 if (!htab->elf.dynamic_sections_created
10312 || h->dynindx == -1)
10313 splt = htab->elf.iplt;
10314
10315 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10316
10317 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10318 {
10319 bfd_put_32 (output_bfd, LWZ_11_3, p);
10320 p += 4;
10321 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10322 p += 4;
10323 bfd_put_32 (output_bfd, MR_0_3, p);
10324 p += 4;
10325 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10326 p += 4;
10327 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10328 p += 4;
10329 bfd_put_32 (output_bfd, BEQLR, p);
10330 p += 4;
10331 bfd_put_32 (output_bfd, MR_3_0, p);
10332 p += 4;
10333 bfd_put_32 (output_bfd, NOP, p);
10334 p += 4;
10335 }
10336
10337 write_glink_stub (ent, splt, p, info);
10338
10339 if (!bfd_link_pic (info))
10340 /* We only need one non-PIC glink stub. */
10341 break;
10342 }
10343 else
10344 break;
10345 }
10346
10347 if (h->needs_copy)
10348 {
10349 asection *s;
10350 Elf_Internal_Rela rela;
10351 bfd_byte *loc;
10352
10353 /* This symbols needs a copy reloc. Set it up. */
10354
10355 #ifdef DEBUG
10356 fprintf (stderr, ", copy");
10357 #endif
10358
10359 BFD_ASSERT (h->dynindx != -1);
10360
10361 if (ppc_elf_hash_entry (h)->has_sda_refs)
10362 s = htab->relsbss;
10363 else
10364 s = htab->relbss;
10365 BFD_ASSERT (s != NULL);
10366
10367 rela.r_offset = SYM_VAL (h);
10368 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10369 rela.r_addend = 0;
10370 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10371 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10372 }
10373
10374 #ifdef DEBUG
10375 fprintf (stderr, "\n");
10376 #endif
10377
10378 return TRUE;
10379 }
10380 \f
10381 static enum elf_reloc_type_class
10382 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10383 const asection *rel_sec,
10384 const Elf_Internal_Rela *rela)
10385 {
10386 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10387
10388 if (rel_sec == htab->elf.irelplt)
10389 return reloc_class_ifunc;
10390
10391 switch (ELF32_R_TYPE (rela->r_info))
10392 {
10393 case R_PPC_RELATIVE:
10394 return reloc_class_relative;
10395 case R_PPC_JMP_SLOT:
10396 return reloc_class_plt;
10397 case R_PPC_COPY:
10398 return reloc_class_copy;
10399 default:
10400 return reloc_class_normal;
10401 }
10402 }
10403 \f
10404 /* Finish up the dynamic sections. */
10405
10406 static bfd_boolean
10407 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10408 struct bfd_link_info *info)
10409 {
10410 asection *sdyn;
10411 asection *splt;
10412 struct ppc_elf_link_hash_table *htab;
10413 bfd_vma got;
10414 bfd *dynobj;
10415 bfd_boolean ret = TRUE;
10416
10417 #ifdef DEBUG
10418 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10419 #endif
10420
10421 htab = ppc_elf_hash_table (info);
10422 dynobj = htab->elf.dynobj;
10423 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10424 if (htab->is_vxworks)
10425 splt = htab->elf.splt;
10426 else
10427 splt = NULL;
10428
10429 got = 0;
10430 if (htab->elf.hgot != NULL)
10431 got = SYM_VAL (htab->elf.hgot);
10432
10433 if (htab->elf.dynamic_sections_created)
10434 {
10435 Elf32_External_Dyn *dyncon, *dynconend;
10436
10437 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10438
10439 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10440 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10441 for (; dyncon < dynconend; dyncon++)
10442 {
10443 Elf_Internal_Dyn dyn;
10444 asection *s;
10445
10446 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10447
10448 switch (dyn.d_tag)
10449 {
10450 case DT_PLTGOT:
10451 if (htab->is_vxworks)
10452 s = htab->elf.sgotplt;
10453 else
10454 s = htab->elf.splt;
10455 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10456 break;
10457
10458 case DT_PLTRELSZ:
10459 dyn.d_un.d_val = htab->elf.srelplt->size;
10460 break;
10461
10462 case DT_JMPREL:
10463 s = htab->elf.srelplt;
10464 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10465 break;
10466
10467 case DT_PPC_GOT:
10468 dyn.d_un.d_ptr = got;
10469 break;
10470
10471 case DT_RELASZ:
10472 if (htab->is_vxworks)
10473 {
10474 if (htab->elf.srelplt)
10475 dyn.d_un.d_ptr -= htab->elf.srelplt->size;
10476 break;
10477 }
10478 continue;
10479
10480 default:
10481 if (htab->is_vxworks
10482 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10483 break;
10484 continue;
10485 }
10486
10487 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10488 }
10489 }
10490
10491 if (htab->elf.sgot != NULL)
10492 {
10493 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10494 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10495 {
10496 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10497
10498 p += htab->elf.hgot->root.u.def.value;
10499 if (htab->plt_type == PLT_OLD)
10500 {
10501 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10502 so that a function can easily find the address of
10503 _GLOBAL_OFFSET_TABLE_. */
10504 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10505 < htab->elf.hgot->root.u.def.section->size);
10506 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10507 }
10508
10509 if (sdyn != NULL)
10510 {
10511 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10512 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10513 < htab->elf.hgot->root.u.def.section->size);
10514 bfd_put_32 (output_bfd, val, p);
10515 }
10516 }
10517 else
10518 {
10519 /* xgettext:c-format */
10520 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10521 htab->elf.hgot->root.root.string,
10522 (htab->elf.sgotplt != NULL
10523 ? htab->elf.sgotplt->name
10524 : htab->elf.sgot->name));
10525 bfd_set_error (bfd_error_bad_value);
10526 ret = FALSE;
10527 }
10528
10529 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10530 }
10531
10532 /* Fill in the first entry in the VxWorks procedure linkage table. */
10533 if (splt && splt->size > 0)
10534 {
10535 /* Use the right PLT. */
10536 const bfd_vma *plt_entry = (bfd_link_pic (info)
10537 ? ppc_elf_vxworks_pic_plt0_entry
10538 : ppc_elf_vxworks_plt0_entry);
10539
10540 if (!bfd_link_pic (info))
10541 {
10542 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10543
10544 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10545 splt->contents + 0);
10546 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10547 splt->contents + 4);
10548 }
10549 else
10550 {
10551 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10552 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10553 }
10554 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10555 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10556 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10557 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10558 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10559 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10560
10561 if (! bfd_link_pic (info))
10562 {
10563 Elf_Internal_Rela rela;
10564 bfd_byte *loc;
10565
10566 loc = htab->srelplt2->contents;
10567
10568 /* Output the @ha relocation for the first instruction. */
10569 rela.r_offset = (htab->elf.splt->output_section->vma
10570 + htab->elf.splt->output_offset
10571 + 2);
10572 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10573 rela.r_addend = 0;
10574 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10575 loc += sizeof (Elf32_External_Rela);
10576
10577 /* Output the @l relocation for the second instruction. */
10578 rela.r_offset = (htab->elf.splt->output_section->vma
10579 + htab->elf.splt->output_offset
10580 + 6);
10581 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10582 rela.r_addend = 0;
10583 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10584 loc += sizeof (Elf32_External_Rela);
10585
10586 /* Fix up the remaining relocations. They may have the wrong
10587 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10588 in which symbols were output. */
10589 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10590 {
10591 Elf_Internal_Rela rel;
10592
10593 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10594 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10595 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10596 loc += sizeof (Elf32_External_Rela);
10597
10598 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10599 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10600 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10601 loc += sizeof (Elf32_External_Rela);
10602
10603 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10604 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10605 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10606 loc += sizeof (Elf32_External_Rela);
10607 }
10608 }
10609 }
10610
10611 if (htab->glink != NULL
10612 && htab->glink->contents != NULL
10613 && htab->elf.dynamic_sections_created)
10614 {
10615 unsigned char *p;
10616 unsigned char *endp;
10617 bfd_vma res0;
10618 unsigned int i;
10619
10620 /*
10621 * PIC glink code is the following:
10622 *
10623 * # ith PLT code stub.
10624 * addis 11,30,(plt+(i-1)*4-got)@ha
10625 * lwz 11,(plt+(i-1)*4-got)@l(11)
10626 * mtctr 11
10627 * bctr
10628 *
10629 * # A table of branches, one for each plt entry.
10630 * # The idea is that the plt call stub loads ctr and r11 with these
10631 * # addresses, so (r11 - res_0) gives the plt index * 4.
10632 * res_0: b PLTresolve
10633 * res_1: b PLTresolve
10634 * .
10635 * # Some number of entries towards the end can be nops
10636 * res_n_m3: nop
10637 * res_n_m2: nop
10638 * res_n_m1:
10639 *
10640 * PLTresolve:
10641 * addis 11,11,(1f-res_0)@ha
10642 * mflr 0
10643 * bcl 20,31,1f
10644 * 1: addi 11,11,(1b-res_0)@l
10645 * mflr 12
10646 * mtlr 0
10647 * sub 11,11,12 # r11 = index * 4
10648 * addis 12,12,(got+4-1b)@ha
10649 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10650 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10651 * mtctr 0
10652 * add 0,11,11
10653 * add 11,0,11 # r11 = index * 12 = reloc offset.
10654 * bctr
10655 */
10656 static const unsigned int pic_plt_resolve[] =
10657 {
10658 ADDIS_11_11,
10659 MFLR_0,
10660 BCL_20_31,
10661 ADDI_11_11,
10662 MFLR_12,
10663 MTLR_0,
10664 SUB_11_11_12,
10665 ADDIS_12_12,
10666 LWZ_0_12,
10667 LWZ_12_12,
10668 MTCTR_0,
10669 ADD_0_11_11,
10670 ADD_11_0_11,
10671 BCTR,
10672 NOP,
10673 NOP
10674 };
10675
10676 /*
10677 * Non-PIC glink code is a little simpler.
10678 *
10679 * # ith PLT code stub.
10680 * lis 11,(plt+(i-1)*4)@ha
10681 * lwz 11,(plt+(i-1)*4)@l(11)
10682 * mtctr 11
10683 * bctr
10684 *
10685 * The branch table is the same, then comes
10686 *
10687 * PLTresolve:
10688 * lis 12,(got+4)@ha
10689 * addis 11,11,(-res_0)@ha
10690 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10691 * addi 11,11,(-res_0)@l # r11 = index * 4
10692 * mtctr 0
10693 * add 0,11,11
10694 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10695 * add 11,0,11 # r11 = index * 12 = reloc offset.
10696 * bctr
10697 */
10698 static const unsigned int plt_resolve[] =
10699 {
10700 LIS_12,
10701 ADDIS_11_11,
10702 LWZ_0_12,
10703 ADDI_11_11,
10704 MTCTR_0,
10705 ADD_0_11_11,
10706 LWZ_12_12,
10707 ADD_11_0_11,
10708 BCTR,
10709 NOP,
10710 NOP,
10711 NOP,
10712 NOP,
10713 NOP,
10714 NOP,
10715 NOP
10716 };
10717
10718 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10719 abort ();
10720 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10721 abort ();
10722
10723 /* Build the branch table, one for each plt entry (less one),
10724 and perhaps some padding. */
10725 p = htab->glink->contents;
10726 p += htab->glink_pltresolve;
10727 endp = htab->glink->contents;
10728 endp += htab->glink->size - GLINK_PLTRESOLVE;
10729 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10730 {
10731 bfd_put_32 (output_bfd, B + endp - p, p);
10732 p += 4;
10733 }
10734 while (p < endp)
10735 {
10736 bfd_put_32 (output_bfd, NOP, p);
10737 p += 4;
10738 }
10739
10740 res0 = (htab->glink_pltresolve
10741 + htab->glink->output_section->vma
10742 + htab->glink->output_offset);
10743
10744 if (htab->params->ppc476_workaround)
10745 {
10746 /* Ensure that a call stub at the end of a page doesn't
10747 result in prefetch over the end of the page into the
10748 glink branch table. */
10749 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10750 bfd_vma page_addr;
10751 bfd_vma glink_start = (htab->glink->output_section->vma
10752 + htab->glink->output_offset);
10753
10754 for (page_addr = res0 & -pagesize;
10755 page_addr > glink_start;
10756 page_addr -= pagesize)
10757 {
10758 /* We have a plt call stub that may need fixing. */
10759 bfd_byte *loc;
10760 unsigned int insn;
10761
10762 loc = htab->glink->contents + page_addr - 4 - glink_start;
10763 insn = bfd_get_32 (output_bfd, loc);
10764 if (insn == BCTR)
10765 {
10766 /* By alignment, we know that there must be at least
10767 one other call stub before this one. */
10768 insn = bfd_get_32 (output_bfd, loc - 16);
10769 if (insn == BCTR)
10770 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10771 else
10772 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10773 }
10774 }
10775 }
10776
10777 /* Last comes the PLTresolve stub. */
10778 if (bfd_link_pic (info))
10779 {
10780 bfd_vma bcl;
10781
10782 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10783 {
10784 unsigned int insn = pic_plt_resolve[i];
10785
10786 if (htab->params->ppc476_workaround && insn == NOP)
10787 insn = BA + 0;
10788 bfd_put_32 (output_bfd, insn, p);
10789 p += 4;
10790 }
10791 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10792
10793 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10794 + htab->glink->output_section->vma
10795 + htab->glink->output_offset);
10796
10797 bfd_put_32 (output_bfd,
10798 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10799 bfd_put_32 (output_bfd,
10800 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10801 bfd_put_32 (output_bfd,
10802 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10803 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10804 {
10805 bfd_put_32 (output_bfd,
10806 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10807 bfd_put_32 (output_bfd,
10808 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10809 }
10810 else
10811 {
10812 bfd_put_32 (output_bfd,
10813 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10814 bfd_put_32 (output_bfd,
10815 LWZ_12_12 + 4, p + 9*4);
10816 }
10817 }
10818 else
10819 {
10820 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10821 {
10822 unsigned int insn = plt_resolve[i];
10823
10824 if (htab->params->ppc476_workaround && insn == NOP)
10825 insn = BA + 0;
10826 bfd_put_32 (output_bfd, insn, p);
10827 p += 4;
10828 }
10829 p -= 4 * ARRAY_SIZE (plt_resolve);
10830
10831 bfd_put_32 (output_bfd,
10832 LIS_12 + PPC_HA (got + 4), p + 0*4);
10833 bfd_put_32 (output_bfd,
10834 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10835 bfd_put_32 (output_bfd,
10836 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10837 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10838 {
10839 bfd_put_32 (output_bfd,
10840 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10841 bfd_put_32 (output_bfd,
10842 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10843 }
10844 else
10845 {
10846 bfd_put_32 (output_bfd,
10847 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10848 bfd_put_32 (output_bfd,
10849 LWZ_12_12 + 4, p + 6*4);
10850 }
10851 }
10852 }
10853
10854 if (htab->glink_eh_frame != NULL
10855 && htab->glink_eh_frame->contents != NULL)
10856 {
10857 unsigned char *p = htab->glink_eh_frame->contents;
10858 bfd_vma val;
10859
10860 p += sizeof (glink_eh_frame_cie);
10861 /* FDE length. */
10862 p += 4;
10863 /* CIE pointer. */
10864 p += 4;
10865 /* Offset to .glink. */
10866 val = (htab->glink->output_section->vma
10867 + htab->glink->output_offset);
10868 val -= (htab->glink_eh_frame->output_section->vma
10869 + htab->glink_eh_frame->output_offset);
10870 val -= p - htab->glink_eh_frame->contents;
10871 bfd_put_32 (htab->elf.dynobj, val, p);
10872
10873 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10874 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10875 htab->glink_eh_frame,
10876 htab->glink_eh_frame->contents))
10877 return FALSE;
10878 }
10879
10880 return ret;
10881 }
10882 \f
10883 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10884 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10885 #define TARGET_BIG_SYM powerpc_elf32_vec
10886 #define TARGET_BIG_NAME "elf32-powerpc"
10887 #define ELF_ARCH bfd_arch_powerpc
10888 #define ELF_TARGET_ID PPC32_ELF_DATA
10889 #define ELF_MACHINE_CODE EM_PPC
10890 #ifdef __QNXTARGET__
10891 #define ELF_MAXPAGESIZE 0x1000
10892 #define ELF_COMMONPAGESIZE 0x1000
10893 #else
10894 #define ELF_MAXPAGESIZE 0x10000
10895 #define ELF_COMMONPAGESIZE 0x10000
10896 #endif
10897 #define ELF_MINPAGESIZE 0x1000
10898 #define elf_info_to_howto ppc_elf_info_to_howto
10899
10900 #ifdef EM_CYGNUS_POWERPC
10901 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10902 #endif
10903
10904 #ifdef EM_PPC_OLD
10905 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10906 #endif
10907
10908 #define elf_backend_plt_not_loaded 1
10909 #define elf_backend_can_gc_sections 1
10910 #define elf_backend_can_refcount 1
10911 #define elf_backend_rela_normal 1
10912 #define elf_backend_caches_rawsize 1
10913
10914 #define bfd_elf32_mkobject ppc_elf_mkobject
10915 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10916 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10917 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10918 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10919 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10920 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10921 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10922
10923 #define elf_backend_object_p ppc_elf_object_p
10924 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10925 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10926 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10927 #define elf_backend_relocate_section ppc_elf_relocate_section
10928 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10929 #define elf_backend_check_relocs ppc_elf_check_relocs
10930 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10931 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10932 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10933 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10934 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10935 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10936 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10937 #define elf_backend_fake_sections ppc_elf_fake_sections
10938 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10939 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10940 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10941 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10942 #define elf_backend_write_core_note ppc_elf_write_core_note
10943 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10944 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10945 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10946 #define elf_backend_write_section ppc_elf_write_section
10947 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10948 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10949 #define elf_backend_action_discarded ppc_elf_action_discarded
10950 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10951 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10952
10953 #include "elf32-target.h"
10954
10955 /* FreeBSD Target */
10956
10957 #undef TARGET_LITTLE_SYM
10958 #undef TARGET_LITTLE_NAME
10959
10960 #undef TARGET_BIG_SYM
10961 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10962 #undef TARGET_BIG_NAME
10963 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10964
10965 #undef ELF_OSABI
10966 #define ELF_OSABI ELFOSABI_FREEBSD
10967
10968 #undef elf32_bed
10969 #define elf32_bed elf32_powerpc_fbsd_bed
10970
10971 #include "elf32-target.h"
10972
10973 /* VxWorks Target */
10974
10975 #undef TARGET_LITTLE_SYM
10976 #undef TARGET_LITTLE_NAME
10977
10978 #undef TARGET_BIG_SYM
10979 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10980 #undef TARGET_BIG_NAME
10981 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10982
10983 #undef ELF_OSABI
10984
10985 /* VxWorks uses the elf default section flags for .plt. */
10986 static const struct bfd_elf_special_section *
10987 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10988 {
10989 if (sec->name == NULL)
10990 return NULL;
10991
10992 if (strcmp (sec->name, ".plt") == 0)
10993 return _bfd_elf_get_sec_type_attr (abfd, sec);
10994
10995 return ppc_elf_get_sec_type_attr (abfd, sec);
10996 }
10997
10998 /* Like ppc_elf_link_hash_table_create, but overrides
10999 appropriately for VxWorks. */
11000 static struct bfd_link_hash_table *
11001 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11002 {
11003 struct bfd_link_hash_table *ret;
11004
11005 ret = ppc_elf_link_hash_table_create (abfd);
11006 if (ret)
11007 {
11008 struct ppc_elf_link_hash_table *htab
11009 = (struct ppc_elf_link_hash_table *)ret;
11010 htab->is_vxworks = 1;
11011 htab->plt_type = PLT_VXWORKS;
11012 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11013 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11014 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11015 }
11016 return ret;
11017 }
11018
11019 /* Tweak magic VxWorks symbols as they are loaded. */
11020 static bfd_boolean
11021 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11022 struct bfd_link_info *info,
11023 Elf_Internal_Sym *sym,
11024 const char **namep ATTRIBUTE_UNUSED,
11025 flagword *flagsp ATTRIBUTE_UNUSED,
11026 asection **secp,
11027 bfd_vma *valp)
11028 {
11029 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
11030 valp))
11031 return FALSE;
11032
11033 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11034 }
11035
11036 static void
11037 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11038 {
11039 ppc_elf_final_write_processing(abfd, linker);
11040 elf_vxworks_final_write_processing(abfd, linker);
11041 }
11042
11043 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11044 define it. */
11045 #undef elf_backend_want_plt_sym
11046 #define elf_backend_want_plt_sym 1
11047 #undef elf_backend_want_got_plt
11048 #define elf_backend_want_got_plt 1
11049 #undef elf_backend_got_symbol_offset
11050 #define elf_backend_got_symbol_offset 0
11051 #undef elf_backend_plt_not_loaded
11052 #define elf_backend_plt_not_loaded 0
11053 #undef elf_backend_plt_readonly
11054 #define elf_backend_plt_readonly 1
11055 #undef elf_backend_got_header_size
11056 #define elf_backend_got_header_size 12
11057
11058 #undef bfd_elf32_get_synthetic_symtab
11059
11060 #undef bfd_elf32_bfd_link_hash_table_create
11061 #define bfd_elf32_bfd_link_hash_table_create \
11062 ppc_elf_vxworks_link_hash_table_create
11063 #undef elf_backend_add_symbol_hook
11064 #define elf_backend_add_symbol_hook \
11065 ppc_elf_vxworks_add_symbol_hook
11066 #undef elf_backend_link_output_symbol_hook
11067 #define elf_backend_link_output_symbol_hook \
11068 elf_vxworks_link_output_symbol_hook
11069 #undef elf_backend_final_write_processing
11070 #define elf_backend_final_write_processing \
11071 ppc_elf_vxworks_final_write_processing
11072 #undef elf_backend_get_sec_type_attr
11073 #define elf_backend_get_sec_type_attr \
11074 ppc_elf_vxworks_get_sec_type_attr
11075 #undef elf_backend_emit_relocs
11076 #define elf_backend_emit_relocs \
11077 elf_vxworks_emit_relocs
11078
11079 #undef elf32_bed
11080 #define elf32_bed ppc_elf_vxworks_bed
11081 #undef elf_backend_post_process_headers
11082
11083 #include "elf32-target.h"
GDB Binutils - Deliverables
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