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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x3e007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x3e007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x3e007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x3e007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x3e007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x3e007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* e_li split20 format. */
1660 HOWTO (R_PPC_VLE_ADDR20, /* type */
1661 16, /* rightshift */
1662 2, /* size (0 = byte, 1 = short, 2 = long) */
1663 20, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 bfd_elf_generic_reloc, /* special_function */
1668 "R_PPC_VLE_ADDR20", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0x1f07ff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 HOWTO (R_PPC_IRELATIVE, /* type */
1675 0, /* rightshift */
1676 2, /* size (0 = byte, 1 = short, 2 = long) */
1677 32, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc_elf_unhandled_reloc, /* special_function */
1682 "R_PPC_IRELATIVE", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffffffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation. */
1689 HOWTO (R_PPC_REL16, /* 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_signed, /* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* A 16 bit relative relocation without overflow. */
1704 HOWTO (R_PPC_REL16_LO, /* type */
1705 0, /* 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_LO", /* 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. */
1719 HOWTO (R_PPC_REL16_HI, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 bfd_elf_generic_reloc, /* special_function */
1727 "R_PPC_REL16_HI", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* The high order 16 bits of a relative address, plus 1 if the contents of
1734 the low 16 bits, treated as a signed number, is negative. */
1735 HOWTO (R_PPC_REL16_HA, /* type */
1736 16, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1750 HOWTO (R_PPC_REL16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 TRUE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_REL16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 TRUE), /* pcrel_offset */
1763
1764 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1765 HOWTO (R_PPC_16DX_HA, /* type */
1766 16, /* rightshift */
1767 2, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 ppc_elf_addr16_ha_reloc, /* special_function */
1773 "R_PPC_16DX_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0x1fffc1, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable hierarchy. */
1780 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTINHERIT", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* GNU extension to record C++ vtable member usage. */
1795 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1796 0, /* rightshift */
1797 0, /* size (0 = byte, 1 = short, 2 = long) */
1798 0, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_dont, /* complain_on_overflow */
1802 NULL, /* special_function */
1803 "R_PPC_GNU_VTENTRY", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808
1809 /* Phony reloc to handle AIX style TOC entries. */
1810 HOWTO (R_PPC_TOC16, /* type */
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc_elf_unhandled_reloc, /* special_function */
1818 "R_PPC_TOC16", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xffff, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823 };
1824 \f
1825 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1826
1827 static void
1828 ppc_elf_howto_init (void)
1829 {
1830 unsigned int i, type;
1831
1832 for (i = 0;
1833 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1834 i++)
1835 {
1836 type = ppc_elf_howto_raw[i].type;
1837 if (type >= (sizeof (ppc_elf_howto_table)
1838 / sizeof (ppc_elf_howto_table[0])))
1839 abort ();
1840 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1841 }
1842 }
1843
1844 static reloc_howto_type *
1845 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1846 bfd_reloc_code_real_type code)
1847 {
1848 enum elf_ppc_reloc_type r;
1849
1850 /* Initialize howto table if not already done. */
1851 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1852 ppc_elf_howto_init ();
1853
1854 switch (code)
1855 {
1856 default:
1857 return NULL;
1858
1859 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1860 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1861 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1862 case BFD_RELOC_PPC64_ADDR16_DS:
1863 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1864 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1865 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1866 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1867 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1868 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1869 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1870 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1871 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1872 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1873 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1874 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1875 case BFD_RELOC_PPC64_GOT16_DS:
1876 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1877 case BFD_RELOC_PPC64_GOT16_LO_DS:
1878 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1879 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1880 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1881 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1882 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1883 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1884 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1885 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1886 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1887 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1888 case BFD_RELOC_PPC64_PLT16_LO_DS:
1889 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1890 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1891 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1892 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1893 case BFD_RELOC_PPC64_SECTOFF_DS:
1894 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1895 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1896 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1897 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1898 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1899 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1900 case BFD_RELOC_PPC64_TOC16_DS:
1901 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1902 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1903 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1904 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1905 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1906 case BFD_RELOC_PPC64_TPREL16_DS:
1907 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1908 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1909 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1910 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1911 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1912 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1913 case BFD_RELOC_PPC64_DTPREL16_DS:
1914 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1915 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1916 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1917 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1918 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1919 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1920 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1921 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1922 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1923 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1924 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1925 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1926 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1927 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1928 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1929 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1933 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1934 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1935 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1936 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1937 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1938 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1939 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1940 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1941 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1942 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1943 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1944 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1945 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1946 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1947 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1948 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1949 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1950 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1951 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1952 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1953 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1954 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1955 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1956 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1957 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1958 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1959 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1960 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1961 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1962 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1963 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1964 r = R_PPC_VLE_SDAREL_LO16A;
1965 break;
1966 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1967 r = R_PPC_VLE_SDAREL_LO16D;
1968 break;
1969 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1970 r = R_PPC_VLE_SDAREL_HI16A;
1971 break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1973 r = R_PPC_VLE_SDAREL_HI16D;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1976 r = R_PPC_VLE_SDAREL_HA16A;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1979 r = R_PPC_VLE_SDAREL_HA16D;
1980 break;
1981 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1982 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1983 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1984 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1985 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
1986 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
1987 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1988 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1989 }
1990
1991 return ppc_elf_howto_table[r];
1992 };
1993
1994 static reloc_howto_type *
1995 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1996 const char *r_name)
1997 {
1998 unsigned int i;
1999
2000 for (i = 0;
2001 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2002 i++)
2003 if (ppc_elf_howto_raw[i].name != NULL
2004 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2005 return &ppc_elf_howto_raw[i];
2006
2007 return NULL;
2008 }
2009
2010 /* Set the howto pointer for a PowerPC ELF reloc. */
2011
2012 static void
2013 ppc_elf_info_to_howto (bfd *abfd,
2014 arelent *cache_ptr,
2015 Elf_Internal_Rela *dst)
2016 {
2017 unsigned int r_type;
2018
2019 /* Initialize howto table if not already done. */
2020 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2021 ppc_elf_howto_init ();
2022
2023 r_type = ELF32_R_TYPE (dst->r_info);
2024 if (r_type >= R_PPC_max)
2025 {
2026 /* xgettext:c-format */
2027 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2028 abfd, r_type);
2029 bfd_set_error (bfd_error_bad_value);
2030 r_type = R_PPC_NONE;
2031 }
2032 cache_ptr->howto = ppc_elf_howto_table[r_type];
2033
2034 /* Just because the above assert didn't trigger doesn't mean that
2035 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2036 if (!cache_ptr->howto)
2037 {
2038 /* xgettext:c-format */
2039 _bfd_error_handler (_("%B: invalid relocation type %d"),
2040 abfd, r_type);
2041 bfd_set_error (bfd_error_bad_value);
2042
2043 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2044 }
2045 }
2046
2047 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2048
2049 static bfd_reloc_status_type
2050 ppc_elf_addr16_ha_reloc (bfd *abfd,
2051 arelent *reloc_entry,
2052 asymbol *symbol,
2053 void *data,
2054 asection *input_section,
2055 bfd *output_bfd,
2056 char **error_message ATTRIBUTE_UNUSED)
2057 {
2058 enum elf_ppc_reloc_type r_type;
2059 long insn;
2060 bfd_size_type octets;
2061 bfd_vma value;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 reloc_entry->addend += 0x8000;
2070 r_type = reloc_entry->howto->type;
2071 if (r_type != R_PPC_REL16DX_HA)
2072 return bfd_reloc_continue;
2073
2074 value = 0;
2075 if (!bfd_is_com_section (symbol->section))
2076 value = symbol->value;
2077 value += (reloc_entry->addend
2078 + symbol->section->output_offset
2079 + symbol->section->output_section->vma);
2080 value -= (reloc_entry->address
2081 + input_section->output_offset
2082 + input_section->output_section->vma);
2083 value >>= 16;
2084
2085 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2086 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2087 insn &= ~0x1fffc1;
2088 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2089 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2090 return bfd_reloc_ok;
2091 }
2092
2093 static bfd_reloc_status_type
2094 ppc_elf_unhandled_reloc (bfd *abfd,
2095 arelent *reloc_entry,
2096 asymbol *symbol,
2097 void *data,
2098 asection *input_section,
2099 bfd *output_bfd,
2100 char **error_message)
2101 {
2102 /* If this is a relocatable link (output_bfd test tells us), just
2103 call the generic function. Any adjustment will be done at final
2104 link time. */
2105 if (output_bfd != NULL)
2106 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2107 input_section, output_bfd, error_message);
2108
2109 if (error_message != NULL)
2110 {
2111 static char buf[60];
2112 sprintf (buf, _("generic linker can't handle %s"),
2113 reloc_entry->howto->name);
2114 *error_message = buf;
2115 }
2116 return bfd_reloc_dangerous;
2117 }
2118 \f
2119 /* Sections created by the linker. */
2120
2121 typedef struct elf_linker_section
2122 {
2123 /* Pointer to the bfd section. */
2124 asection *section;
2125 /* Section name. */
2126 const char *name;
2127 /* Associated bss section name. */
2128 const char *bss_name;
2129 /* Associated symbol name. */
2130 const char *sym_name;
2131 /* Associated symbol. */
2132 struct elf_link_hash_entry *sym;
2133 } elf_linker_section_t;
2134
2135 /* Linked list of allocated pointer entries. This hangs off of the
2136 symbol lists, and provides allows us to return different pointers,
2137 based on different addend's. */
2138
2139 typedef struct elf_linker_section_pointers
2140 {
2141 /* next allocated pointer for this symbol */
2142 struct elf_linker_section_pointers *next;
2143 /* offset of pointer from beginning of section */
2144 bfd_vma offset;
2145 /* addend used */
2146 bfd_vma addend;
2147 /* which linker section this is */
2148 elf_linker_section_t *lsect;
2149 } elf_linker_section_pointers_t;
2150
2151 struct ppc_elf_obj_tdata
2152 {
2153 struct elf_obj_tdata elf;
2154
2155 /* A mapping from local symbols to offsets into the various linker
2156 sections added. This is index by the symbol index. */
2157 elf_linker_section_pointers_t **linker_section_pointers;
2158
2159 /* Flags used to auto-detect plt type. */
2160 unsigned int makes_plt_call : 1;
2161 unsigned int has_rel16 : 1;
2162 };
2163
2164 #define ppc_elf_tdata(bfd) \
2165 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2166
2167 #define elf_local_ptr_offsets(bfd) \
2168 (ppc_elf_tdata (bfd)->linker_section_pointers)
2169
2170 #define is_ppc_elf(bfd) \
2171 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2172 && elf_object_id (bfd) == PPC32_ELF_DATA)
2173
2174 /* Override the generic function because we store some extras. */
2175
2176 static bfd_boolean
2177 ppc_elf_mkobject (bfd *abfd)
2178 {
2179 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2180 PPC32_ELF_DATA);
2181 }
2182
2183 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2184
2185 bfd_boolean
2186 _bfd_elf_ppc_set_arch (bfd *abfd)
2187 {
2188 unsigned long mach = 0;
2189 asection *s;
2190 unsigned char *contents;
2191
2192 if (abfd->arch_info->bits_per_word == 32
2193 && bfd_big_endian (abfd))
2194 {
2195
2196 for (s = abfd->sections; s != NULL; s = s->next)
2197 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2198 break;
2199 if (s != NULL)
2200 mach = bfd_mach_ppc_vle;
2201 }
2202
2203 if (mach == 0)
2204 {
2205 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2206 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2207 {
2208 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2209 unsigned int i;
2210
2211 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2212 {
2213 unsigned int val = bfd_get_32 (abfd, contents + i);
2214 switch (val >> 16)
2215 {
2216 case PPC_APUINFO_PMR:
2217 case PPC_APUINFO_RFMCI:
2218 if (mach == 0)
2219 mach = bfd_mach_ppc_titan;
2220 break;
2221
2222 case PPC_APUINFO_ISEL:
2223 case PPC_APUINFO_CACHELCK:
2224 if (mach == bfd_mach_ppc_titan)
2225 mach = bfd_mach_ppc_e500mc;
2226 break;
2227
2228 case PPC_APUINFO_SPE:
2229 case PPC_APUINFO_EFS:
2230 case PPC_APUINFO_BRLOCK:
2231 if (mach != bfd_mach_ppc_vle)
2232 mach = bfd_mach_ppc_e500;
2233 break;
2234
2235 case PPC_APUINFO_VLE:
2236 mach = bfd_mach_ppc_vle;
2237 break;
2238
2239 default:
2240 mach = -1ul;
2241 }
2242 }
2243 free (contents);
2244 }
2245 }
2246
2247 if (mach != 0 && mach != -1ul)
2248 {
2249 const bfd_arch_info_type *arch;
2250
2251 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2252 if (arch->mach == mach)
2253 {
2254 abfd->arch_info = arch;
2255 break;
2256 }
2257 }
2258 return TRUE;
2259 }
2260
2261 /* Fix bad default arch selected for a 32 bit input bfd when the
2262 default is 64 bit. Also select arch based on apuinfo. */
2263
2264 static bfd_boolean
2265 ppc_elf_object_p (bfd *abfd)
2266 {
2267 if (!abfd->arch_info->the_default)
2268 return TRUE;
2269
2270 if (abfd->arch_info->bits_per_word == 64)
2271 {
2272 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2273
2274 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2275 {
2276 /* Relies on arch after 64 bit default being 32 bit default. */
2277 abfd->arch_info = abfd->arch_info->next;
2278 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2279 }
2280 }
2281 return _bfd_elf_ppc_set_arch (abfd);
2282 }
2283
2284 /* Function to set whether a module needs the -mrelocatable bit set. */
2285
2286 static bfd_boolean
2287 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2288 {
2289 BFD_ASSERT (!elf_flags_init (abfd)
2290 || elf_elfheader (abfd)->e_flags == flags);
2291
2292 elf_elfheader (abfd)->e_flags = flags;
2293 elf_flags_init (abfd) = TRUE;
2294 return TRUE;
2295 }
2296
2297 /* Support for core dump NOTE sections. */
2298
2299 static bfd_boolean
2300 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2301 {
2302 int offset;
2303 unsigned int size;
2304
2305 switch (note->descsz)
2306 {
2307 default:
2308 return FALSE;
2309
2310 case 268: /* Linux/PPC. */
2311 /* pr_cursig */
2312 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2313
2314 /* pr_pid */
2315 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2316
2317 /* pr_reg */
2318 offset = 72;
2319 size = 192;
2320
2321 break;
2322 }
2323
2324 /* Make a ".reg/999" section. */
2325 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2326 size, note->descpos + offset);
2327 }
2328
2329 static bfd_boolean
2330 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2331 {
2332 switch (note->descsz)
2333 {
2334 default:
2335 return FALSE;
2336
2337 case 128: /* Linux/PPC elf_prpsinfo. */
2338 elf_tdata (abfd)->core->pid
2339 = bfd_get_32 (abfd, note->descdata + 16);
2340 elf_tdata (abfd)->core->program
2341 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2342 elf_tdata (abfd)->core->command
2343 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2344 }
2345
2346 /* Note that for some reason, a spurious space is tacked
2347 onto the end of the args in some (at least one anyway)
2348 implementations, so strip it off if it exists. */
2349
2350 {
2351 char *command = elf_tdata (abfd)->core->command;
2352 int n = strlen (command);
2353
2354 if (0 < n && command[n - 1] == ' ')
2355 command[n - 1] = '\0';
2356 }
2357
2358 return TRUE;
2359 }
2360
2361 static char *
2362 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2363 {
2364 switch (note_type)
2365 {
2366 default:
2367 return NULL;
2368
2369 case NT_PRPSINFO:
2370 {
2371 char data[128];
2372 va_list ap;
2373
2374 va_start (ap, note_type);
2375 memset (data, 0, sizeof (data));
2376 strncpy (data + 32, va_arg (ap, const char *), 16);
2377 strncpy (data + 48, va_arg (ap, const char *), 80);
2378 va_end (ap);
2379 return elfcore_write_note (abfd, buf, bufsiz,
2380 "CORE", note_type, data, sizeof (data));
2381 }
2382
2383 case NT_PRSTATUS:
2384 {
2385 char data[268];
2386 va_list ap;
2387 long pid;
2388 int cursig;
2389 const void *greg;
2390
2391 va_start (ap, note_type);
2392 memset (data, 0, 72);
2393 pid = va_arg (ap, long);
2394 bfd_put_32 (abfd, pid, data + 24);
2395 cursig = va_arg (ap, int);
2396 bfd_put_16 (abfd, cursig, data + 12);
2397 greg = va_arg (ap, const void *);
2398 memcpy (data + 72, greg, 192);
2399 memset (data + 264, 0, 4);
2400 va_end (ap);
2401 return elfcore_write_note (abfd, buf, bufsiz,
2402 "CORE", note_type, data, sizeof (data));
2403 }
2404 }
2405 }
2406
2407 static flagword
2408 ppc_elf_lookup_section_flags (char *flag_name)
2409 {
2410
2411 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2412 return SHF_PPC_VLE;
2413
2414 return 0;
2415 }
2416
2417 /* Return address for Ith PLT stub in section PLT, for relocation REL
2418 or (bfd_vma) -1 if it should not be included. */
2419
2420 static bfd_vma
2421 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2422 const asection *plt ATTRIBUTE_UNUSED,
2423 const arelent *rel)
2424 {
2425 return rel->address;
2426 }
2427
2428 /* Handle a PowerPC specific section when reading an object file. This
2429 is called when bfd_section_from_shdr finds a section with an unknown
2430 type. */
2431
2432 static bfd_boolean
2433 ppc_elf_section_from_shdr (bfd *abfd,
2434 Elf_Internal_Shdr *hdr,
2435 const char *name,
2436 int shindex)
2437 {
2438 asection *newsect;
2439 flagword flags;
2440
2441 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2442 return FALSE;
2443
2444 newsect = hdr->bfd_section;
2445 flags = bfd_get_section_flags (abfd, newsect);
2446 if (hdr->sh_flags & SHF_EXCLUDE)
2447 flags |= SEC_EXCLUDE;
2448
2449 if (hdr->sh_type == SHT_ORDERED)
2450 flags |= SEC_SORT_ENTRIES;
2451
2452 bfd_set_section_flags (abfd, newsect, flags);
2453 return TRUE;
2454 }
2455
2456 /* Set up any other section flags and such that may be necessary. */
2457
2458 static bfd_boolean
2459 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2460 Elf_Internal_Shdr *shdr,
2461 asection *asect)
2462 {
2463 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2464 shdr->sh_type = SHT_ORDERED;
2465
2466 return TRUE;
2467 }
2468
2469 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2470 need to bump up the number of section headers. */
2471
2472 static int
2473 ppc_elf_additional_program_headers (bfd *abfd,
2474 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2475 {
2476 asection *s;
2477 int ret = 0;
2478
2479 s = bfd_get_section_by_name (abfd, ".sbss2");
2480 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2481 ++ret;
2482
2483 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2484 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2485 ++ret;
2486
2487 return ret;
2488 }
2489
2490 /* Modify the segment map for VLE executables. */
2491
2492 bfd_boolean
2493 ppc_elf_modify_segment_map (bfd *abfd,
2494 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2495 {
2496 struct elf_segment_map *m;
2497
2498 /* At this point in the link, output sections have already been sorted by
2499 LMA and assigned to segments. All that is left to do is to ensure
2500 there is no mixing of VLE & non-VLE sections in a text segment.
2501 If we find that case, we split the segment.
2502 We maintain the original output section order. */
2503
2504 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2505 {
2506 struct elf_segment_map *n;
2507 bfd_size_type amt;
2508 unsigned int j, k;
2509 unsigned int p_flags;
2510
2511 if (m->p_type != PT_LOAD || m->count == 0)
2512 continue;
2513
2514 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2515 {
2516 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2517 p_flags |= PF_W;
2518 if ((m->sections[j]->flags & SEC_CODE) != 0)
2519 {
2520 p_flags |= PF_X;
2521 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2522 p_flags |= PF_PPC_VLE;
2523 break;
2524 }
2525 }
2526 if (j != m->count)
2527 while (++j != m->count)
2528 {
2529 unsigned int p_flags1 = PF_R;
2530
2531 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2532 p_flags1 |= PF_W;
2533 if ((m->sections[j]->flags & SEC_CODE) != 0)
2534 {
2535 p_flags1 |= PF_X;
2536 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2537 p_flags1 |= PF_PPC_VLE;
2538 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2539 break;
2540 }
2541 p_flags |= p_flags1;
2542 }
2543 /* If we're splitting a segment which originally contained rw
2544 sections then those sections might now only be in one of the
2545 two parts. So always set p_flags if splitting, even if we
2546 are being called for objcopy with p_flags_valid set. */
2547 if (j != m->count || !m->p_flags_valid)
2548 {
2549 m->p_flags_valid = 1;
2550 m->p_flags = p_flags;
2551 }
2552 if (j == m->count)
2553 continue;
2554
2555 /* Sections 0..j-1 stay in this (current) segment,
2556 the remainder are put in a new segment.
2557 The scan resumes with the new segment. */
2558
2559 amt = sizeof (struct elf_segment_map);
2560 amt += (m->count - j - 1) * sizeof (asection *);
2561 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2562 if (n == NULL)
2563 return FALSE;
2564
2565 n->p_type = PT_LOAD;
2566 n->count = m->count - j;
2567 for (k = 0; k < n->count; ++k)
2568 n->sections[k] = m->sections[j + k];
2569 m->count = j;
2570 m->p_size_valid = 0;
2571 n->next = m->next;
2572 m->next = n;
2573 }
2574
2575 return TRUE;
2576 }
2577
2578 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2579 .PPC.EMB.sbss0 a normal section, and not a bss section so
2580 that the linker doesn't crater when trying to make more than
2581 2 sections. */
2582
2583 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2584 {
2585 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2586 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2587 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2588 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2590 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2591 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2592 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2593 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2594 { NULL, 0, 0, 0, 0 }
2595 };
2596
2597 /* This is what we want for new plt/got. */
2598 static struct bfd_elf_special_section ppc_alt_plt =
2599 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2600
2601 static const struct bfd_elf_special_section *
2602 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2603 {
2604 const struct bfd_elf_special_section *ssect;
2605
2606 /* See if this is one of the special sections. */
2607 if (sec->name == NULL)
2608 return NULL;
2609
2610 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2611 sec->use_rela_p);
2612 if (ssect != NULL)
2613 {
2614 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2615 ssect = &ppc_alt_plt;
2616 return ssect;
2617 }
2618
2619 return _bfd_elf_get_sec_type_attr (abfd, sec);
2620 }
2621 \f
2622 /* Very simple linked list structure for recording apuinfo values. */
2623 typedef struct apuinfo_list
2624 {
2625 struct apuinfo_list *next;
2626 unsigned long value;
2627 }
2628 apuinfo_list;
2629
2630 static apuinfo_list *head;
2631 static bfd_boolean apuinfo_set;
2632
2633 static void
2634 apuinfo_list_init (void)
2635 {
2636 head = NULL;
2637 apuinfo_set = FALSE;
2638 }
2639
2640 static void
2641 apuinfo_list_add (unsigned long value)
2642 {
2643 apuinfo_list *entry = head;
2644
2645 while (entry != NULL)
2646 {
2647 if (entry->value == value)
2648 return;
2649 entry = entry->next;
2650 }
2651
2652 entry = bfd_malloc (sizeof (* entry));
2653 if (entry == NULL)
2654 return;
2655
2656 entry->value = value;
2657 entry->next = head;
2658 head = entry;
2659 }
2660
2661 static unsigned
2662 apuinfo_list_length (void)
2663 {
2664 apuinfo_list *entry;
2665 unsigned long count;
2666
2667 for (entry = head, count = 0;
2668 entry;
2669 entry = entry->next)
2670 ++ count;
2671
2672 return count;
2673 }
2674
2675 static inline unsigned long
2676 apuinfo_list_element (unsigned long number)
2677 {
2678 apuinfo_list * entry;
2679
2680 for (entry = head;
2681 entry && number --;
2682 entry = entry->next)
2683 ;
2684
2685 return entry ? entry->value : 0;
2686 }
2687
2688 static void
2689 apuinfo_list_finish (void)
2690 {
2691 apuinfo_list *entry;
2692
2693 for (entry = head; entry;)
2694 {
2695 apuinfo_list *next = entry->next;
2696 free (entry);
2697 entry = next;
2698 }
2699
2700 head = NULL;
2701 }
2702
2703 /* Scan the input BFDs and create a linked list of
2704 the APUinfo values that will need to be emitted. */
2705
2706 static void
2707 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2708 {
2709 bfd *ibfd;
2710 asection *asec;
2711 char *buffer = NULL;
2712 bfd_size_type largest_input_size = 0;
2713 unsigned i;
2714 unsigned long length;
2715 const char *error_message = NULL;
2716
2717 if (link_info == NULL)
2718 return;
2719
2720 apuinfo_list_init ();
2721
2722 /* Read in the input sections contents. */
2723 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2724 {
2725 unsigned long datum;
2726
2727 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2728 if (asec == NULL)
2729 continue;
2730
2731 /* xgettext:c-format */
2732 error_message = _("corrupt %s section in %B");
2733 length = asec->size;
2734 if (length < 20)
2735 goto fail;
2736
2737 apuinfo_set = TRUE;
2738 if (largest_input_size < asec->size)
2739 {
2740 if (buffer)
2741 free (buffer);
2742 largest_input_size = asec->size;
2743 buffer = bfd_malloc (largest_input_size);
2744 if (!buffer)
2745 return;
2746 }
2747
2748 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2749 || (bfd_bread (buffer, length, ibfd) != length))
2750 {
2751 /* xgettext:c-format */
2752 error_message = _("unable to read in %s section from %B");
2753 goto fail;
2754 }
2755
2756 /* Verify the contents of the header. Note - we have to
2757 extract the values this way in order to allow for a
2758 host whose endian-ness is different from the target. */
2759 datum = bfd_get_32 (ibfd, buffer);
2760 if (datum != sizeof APUINFO_LABEL)
2761 goto fail;
2762
2763 datum = bfd_get_32 (ibfd, buffer + 8);
2764 if (datum != 0x2)
2765 goto fail;
2766
2767 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2768 goto fail;
2769
2770 /* Get the number of bytes used for apuinfo entries. */
2771 datum = bfd_get_32 (ibfd, buffer + 4);
2772 if (datum + 20 != length)
2773 goto fail;
2774
2775 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2776 for (i = 0; i < datum; i += 4)
2777 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2778 }
2779
2780 error_message = NULL;
2781
2782 if (apuinfo_set)
2783 {
2784 /* Compute the size of the output section. */
2785 unsigned num_entries = apuinfo_list_length ();
2786
2787 /* Set the output section size, if it exists. */
2788 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2789
2790 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2791 {
2792 ibfd = abfd;
2793 /* xgettext:c-format */
2794 error_message = _("warning: unable to set size of %s section in %B");
2795 }
2796 }
2797
2798 fail:
2799 if (buffer)
2800 free (buffer);
2801
2802 if (error_message)
2803 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2804 }
2805
2806 /* Prevent the output section from accumulating the input sections'
2807 contents. We have already stored this in our linked list structure. */
2808
2809 static bfd_boolean
2810 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2811 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2812 asection *asec,
2813 bfd_byte *contents ATTRIBUTE_UNUSED)
2814 {
2815 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2816 }
2817
2818 /* Finally we can generate the output section. */
2819
2820 static void
2821 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2822 {
2823 bfd_byte *buffer;
2824 asection *asec;
2825 unsigned i;
2826 unsigned num_entries;
2827 bfd_size_type length;
2828
2829 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2830 if (asec == NULL)
2831 return;
2832
2833 if (!apuinfo_set)
2834 return;
2835
2836 length = asec->size;
2837 if (length < 20)
2838 return;
2839
2840 buffer = bfd_malloc (length);
2841 if (buffer == NULL)
2842 {
2843 _bfd_error_handler
2844 (_("failed to allocate space for new APUinfo section."));
2845 return;
2846 }
2847
2848 /* Create the apuinfo header. */
2849 num_entries = apuinfo_list_length ();
2850 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2851 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2852 bfd_put_32 (abfd, 0x2, buffer + 8);
2853 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2854
2855 length = 20;
2856 for (i = 0; i < num_entries; i++)
2857 {
2858 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2859 length += 4;
2860 }
2861
2862 if (length != asec->size)
2863 _bfd_error_handler (_("failed to compute new APUinfo section."));
2864
2865 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2866 _bfd_error_handler (_("failed to install new APUinfo section."));
2867
2868 free (buffer);
2869
2870 apuinfo_list_finish ();
2871 }
2872 \f
2873 static bfd_boolean
2874 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2875 {
2876 bfd_byte buf[GLINK_ENTRY_SIZE];
2877
2878 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2879 return FALSE;
2880
2881 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2882 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2883 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2884 && bfd_get_32 (abfd, buf + 12) == BCTR);
2885 }
2886
2887 static bfd_boolean
2888 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2889 {
2890 bfd_vma vma = *(bfd_vma *) ptr;
2891 return ((section->flags & SEC_ALLOC) != 0
2892 && section->vma <= vma
2893 && vma < section->vma + section->size);
2894 }
2895
2896 static long
2897 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2898 long dynsymcount, asymbol **dynsyms,
2899 asymbol **ret)
2900 {
2901 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2902 asection *plt, *relplt, *dynamic, *glink;
2903 bfd_vma glink_vma = 0;
2904 bfd_vma resolv_vma = 0;
2905 bfd_vma stub_vma;
2906 asymbol *s;
2907 arelent *p;
2908 long count, i;
2909 size_t size;
2910 char *names;
2911 bfd_byte buf[4];
2912
2913 *ret = NULL;
2914
2915 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2916 return 0;
2917
2918 if (dynsymcount <= 0)
2919 return 0;
2920
2921 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2922 if (relplt == NULL)
2923 return 0;
2924
2925 plt = bfd_get_section_by_name (abfd, ".plt");
2926 if (plt == NULL)
2927 return 0;
2928
2929 /* Call common code to handle old-style executable PLTs. */
2930 if (elf_section_flags (plt) & SHF_EXECINSTR)
2931 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2932 dynsymcount, dynsyms, ret);
2933
2934 /* If this object was prelinked, the prelinker stored the address
2935 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2936 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2937 if (dynamic != NULL)
2938 {
2939 bfd_byte *dynbuf, *extdyn, *extdynend;
2940 size_t extdynsize;
2941 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2942
2943 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2944 return -1;
2945
2946 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2947 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2948
2949 extdyn = dynbuf;
2950 extdynend = extdyn + dynamic->size;
2951 for (; extdyn < extdynend; extdyn += extdynsize)
2952 {
2953 Elf_Internal_Dyn dyn;
2954 (*swap_dyn_in) (abfd, extdyn, &dyn);
2955
2956 if (dyn.d_tag == DT_NULL)
2957 break;
2958
2959 if (dyn.d_tag == DT_PPC_GOT)
2960 {
2961 unsigned int g_o_t = dyn.d_un.d_val;
2962 asection *got = bfd_get_section_by_name (abfd, ".got");
2963 if (got != NULL
2964 && bfd_get_section_contents (abfd, got, buf,
2965 g_o_t - got->vma + 4, 4))
2966 glink_vma = bfd_get_32 (abfd, buf);
2967 break;
2968 }
2969 }
2970 free (dynbuf);
2971 }
2972
2973 /* Otherwise we read the first plt entry. */
2974 if (glink_vma == 0)
2975 {
2976 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2977 glink_vma = bfd_get_32 (abfd, buf);
2978 }
2979
2980 if (glink_vma == 0)
2981 return 0;
2982
2983 /* The .glink section usually does not survive the final
2984 link; search for the section (usually .text) where the
2985 glink stubs now reside. */
2986 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2987 if (glink == NULL)
2988 return 0;
2989
2990 /* Determine glink PLT resolver by reading the relative branch
2991 from the first glink stub. */
2992 if (bfd_get_section_contents (abfd, glink, buf,
2993 glink_vma - glink->vma, 4))
2994 {
2995 unsigned int insn = bfd_get_32 (abfd, buf);
2996
2997 /* The first glink stub may either branch to the resolver ... */
2998 insn ^= B;
2999 if ((insn & ~0x3fffffc) == 0)
3000 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3001
3002 /* ... or fall through a bunch of NOPs. */
3003 else if ((insn ^ B ^ NOP) == 0)
3004 for (i = 4;
3005 bfd_get_section_contents (abfd, glink, buf,
3006 glink_vma - glink->vma + i, 4);
3007 i += 4)
3008 if (bfd_get_32 (abfd, buf) != NOP)
3009 {
3010 resolv_vma = glink_vma + i;
3011 break;
3012 }
3013 }
3014
3015 count = relplt->size / sizeof (Elf32_External_Rela);
3016 /* If the stubs are those for -shared/-pie then we might have
3017 multiple stubs for each plt entry. If that is the case then
3018 there is no way to associate stubs with their plt entries short
3019 of figuring out the GOT pointer value used in the stub. */
3020 if (!is_nonpic_glink_stub (abfd, glink,
3021 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3022 return 0;
3023
3024 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3025 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3026 return -1;
3027
3028 size = count * sizeof (asymbol);
3029 p = relplt->relocation;
3030 for (i = 0; i < count; i++, p++)
3031 {
3032 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3033 if (p->addend != 0)
3034 size += sizeof ("+0x") - 1 + 8;
3035 }
3036
3037 size += sizeof (asymbol) + sizeof ("__glink");
3038
3039 if (resolv_vma)
3040 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3041
3042 s = *ret = bfd_malloc (size);
3043 if (s == NULL)
3044 return -1;
3045
3046 stub_vma = glink_vma;
3047 names = (char *) (s + count + 1 + (resolv_vma != 0));
3048 p = relplt->relocation + count - 1;
3049 for (i = 0; i < count; i++)
3050 {
3051 size_t len;
3052
3053 *s = **p->sym_ptr_ptr;
3054 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3055 we are defining a symbol, ensure one of them is set. */
3056 if ((s->flags & BSF_LOCAL) == 0)
3057 s->flags |= BSF_GLOBAL;
3058 s->flags |= BSF_SYNTHETIC;
3059 s->section = glink;
3060 stub_vma -= 16;
3061 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3062 stub_vma -= 32;
3063 s->value = stub_vma - glink->vma;
3064 s->name = names;
3065 s->udata.p = NULL;
3066 len = strlen ((*p->sym_ptr_ptr)->name);
3067 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3068 names += len;
3069 if (p->addend != 0)
3070 {
3071 memcpy (names, "+0x", sizeof ("+0x") - 1);
3072 names += sizeof ("+0x") - 1;
3073 bfd_sprintf_vma (abfd, names, p->addend);
3074 names += strlen (names);
3075 }
3076 memcpy (names, "@plt", sizeof ("@plt"));
3077 names += sizeof ("@plt");
3078 ++s;
3079 --p;
3080 }
3081
3082 /* Add a symbol at the start of the glink branch table. */
3083 memset (s, 0, sizeof *s);
3084 s->the_bfd = abfd;
3085 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3086 s->section = glink;
3087 s->value = glink_vma - glink->vma;
3088 s->name = names;
3089 memcpy (names, "__glink", sizeof ("__glink"));
3090 names += sizeof ("__glink");
3091 s++;
3092 count++;
3093
3094 if (resolv_vma)
3095 {
3096 /* Add a symbol for the glink PLT resolver. */
3097 memset (s, 0, sizeof *s);
3098 s->the_bfd = abfd;
3099 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3100 s->section = glink;
3101 s->value = resolv_vma - glink->vma;
3102 s->name = names;
3103 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3104 names += sizeof ("__glink_PLTresolve");
3105 s++;
3106 count++;
3107 }
3108
3109 return count;
3110 }
3111 \f
3112 /* The following functions are specific to the ELF linker, while
3113 functions above are used generally. They appear in this file more
3114 or less in the order in which they are called. eg.
3115 ppc_elf_check_relocs is called early in the link process,
3116 ppc_elf_finish_dynamic_sections is one of the last functions
3117 called. */
3118
3119 /* Track PLT entries needed for a given symbol. We might need more
3120 than one glink entry per symbol when generating a pic binary. */
3121 struct plt_entry
3122 {
3123 struct plt_entry *next;
3124
3125 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3126 This field stores the offset into .got2 used to initialise the
3127 GOT pointer reg. It will always be at least 32768. (Current
3128 gcc always uses an offset of 32768, but ld -r will pack .got2
3129 sections together resulting in larger offsets). */
3130 bfd_vma addend;
3131
3132 /* The .got2 section. */
3133 asection *sec;
3134
3135 /* PLT refcount or offset. */
3136 union
3137 {
3138 bfd_signed_vma refcount;
3139 bfd_vma offset;
3140 } plt;
3141
3142 /* .glink stub offset. */
3143 bfd_vma glink_offset;
3144 };
3145
3146 /* Of those relocs that might be copied as dynamic relocs, this
3147 function selects those that must be copied when linking a shared
3148 library or PIE, even when the symbol is local. */
3149
3150 static int
3151 must_be_dyn_reloc (struct bfd_link_info *info,
3152 enum elf_ppc_reloc_type r_type)
3153 {
3154 switch (r_type)
3155 {
3156 default:
3157 /* Only relative relocs can be resolved when the object load
3158 address isn't fixed. DTPREL32 is excluded because the
3159 dynamic linker needs to differentiate global dynamic from
3160 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3161 return 1;
3162
3163 case R_PPC_REL24:
3164 case R_PPC_REL14:
3165 case R_PPC_REL14_BRTAKEN:
3166 case R_PPC_REL14_BRNTAKEN:
3167 case R_PPC_REL32:
3168 return 0;
3169
3170 case R_PPC_TPREL32:
3171 case R_PPC_TPREL16:
3172 case R_PPC_TPREL16_LO:
3173 case R_PPC_TPREL16_HI:
3174 case R_PPC_TPREL16_HA:
3175 /* These relocations are relative but in a shared library the
3176 linker doesn't know the thread pointer base. */
3177 return bfd_link_dll (info);
3178 }
3179 }
3180
3181 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3182 copying dynamic variables from a shared lib into an app's dynbss
3183 section, and instead use a dynamic relocation to point into the
3184 shared lib. */
3185 #define ELIMINATE_COPY_RELOCS 1
3186
3187 /* Used to track dynamic relocations for local symbols. */
3188 struct ppc_dyn_relocs
3189 {
3190 struct ppc_dyn_relocs *next;
3191
3192 /* The input section of the reloc. */
3193 asection *sec;
3194
3195 /* Total number of relocs copied for the input section. */
3196 unsigned int count : 31;
3197
3198 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3199 unsigned int ifunc : 1;
3200 };
3201
3202 /* PPC ELF linker hash entry. */
3203
3204 struct ppc_elf_link_hash_entry
3205 {
3206 struct elf_link_hash_entry elf;
3207
3208 /* If this symbol is used in the linker created sections, the processor
3209 specific backend uses this field to map the field into the offset
3210 from the beginning of the section. */
3211 elf_linker_section_pointers_t *linker_section_pointer;
3212
3213 /* Track dynamic relocs copied for this symbol. */
3214 struct elf_dyn_relocs *dyn_relocs;
3215
3216 /* Contexts in which symbol is used in the GOT (or TOC).
3217 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3218 corresponding relocs are encountered during check_relocs.
3219 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3220 indicate the corresponding GOT entry type is not needed. */
3221 #define TLS_GD 1 /* GD reloc. */
3222 #define TLS_LD 2 /* LD reloc. */
3223 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3224 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3225 #define TLS_TLS 16 /* Any TLS reloc. */
3226 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3227 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3228 char tls_mask;
3229
3230 /* Nonzero if we have seen a small data relocation referring to this
3231 symbol. */
3232 unsigned char has_sda_refs : 1;
3233
3234 /* Flag use of given relocations. */
3235 unsigned char has_addr16_ha : 1;
3236 unsigned char has_addr16_lo : 1;
3237 };
3238
3239 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3240
3241 /* PPC ELF linker hash table. */
3242
3243 struct ppc_elf_link_hash_table
3244 {
3245 struct elf_link_hash_table elf;
3246
3247 /* Various options passed from the linker. */
3248 struct ppc_elf_params *params;
3249
3250 /* Short-cuts to get to dynamic linker sections. */
3251 asection *glink;
3252 asection *dynsbss;
3253 asection *relsbss;
3254 elf_linker_section_t sdata[2];
3255 asection *sbss;
3256 asection *glink_eh_frame;
3257
3258 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3259 asection *srelplt2;
3260
3261 /* Shortcut to __tls_get_addr. */
3262 struct elf_link_hash_entry *tls_get_addr;
3263
3264 /* The bfd that forced an old-style PLT. */
3265 bfd *old_bfd;
3266
3267 /* TLS local dynamic got entry handling. */
3268 union {
3269 bfd_signed_vma refcount;
3270 bfd_vma offset;
3271 } tlsld_got;
3272
3273 /* Offset of branch table to PltResolve function in glink. */
3274 bfd_vma glink_pltresolve;
3275
3276 /* Size of reserved GOT entries. */
3277 unsigned int got_header_size;
3278 /* Non-zero if allocating the header left a gap. */
3279 unsigned int got_gap;
3280
3281 /* The type of PLT we have chosen to use. */
3282 enum ppc_elf_plt_type plt_type;
3283
3284 /* True if the target system is VxWorks. */
3285 unsigned int is_vxworks:1;
3286
3287 /* Whether there exist local gnu indirect function resolvers,
3288 referenced by dynamic relocations. */
3289 unsigned int local_ifunc_resolver:1;
3290 unsigned int maybe_local_ifunc_resolver:1;
3291
3292 /* Set if tls optimization is enabled. */
3293 unsigned int do_tls_opt:1;
3294
3295 /* The size of PLT entries. */
3296 int plt_entry_size;
3297 /* The distance between adjacent PLT slots. */
3298 int plt_slot_size;
3299 /* The size of the first PLT entry. */
3300 int plt_initial_entry_size;
3301
3302 /* Small local sym cache. */
3303 struct sym_cache sym_cache;
3304 };
3305
3306 /* Rename some of the generic section flags to better document how they
3307 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3308
3309 /* Nonzero if this section has TLS related relocations. */
3310 #define has_tls_reloc sec_flg0
3311
3312 /* Nonzero if this section has a call to __tls_get_addr. */
3313 #define has_tls_get_addr_call sec_flg1
3314
3315 /* Get the PPC ELF linker hash table from a link_info structure. */
3316
3317 #define ppc_elf_hash_table(p) \
3318 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3319 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3320
3321 /* Create an entry in a PPC ELF linker hash table. */
3322
3323 static struct bfd_hash_entry *
3324 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3325 struct bfd_hash_table *table,
3326 const char *string)
3327 {
3328 /* Allocate the structure if it has not already been allocated by a
3329 subclass. */
3330 if (entry == NULL)
3331 {
3332 entry = bfd_hash_allocate (table,
3333 sizeof (struct ppc_elf_link_hash_entry));
3334 if (entry == NULL)
3335 return entry;
3336 }
3337
3338 /* Call the allocation method of the superclass. */
3339 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3340 if (entry != NULL)
3341 {
3342 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3343 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3344 ppc_elf_hash_entry (entry)->tls_mask = 0;
3345 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3346 }
3347
3348 return entry;
3349 }
3350
3351 /* Create a PPC ELF linker hash table. */
3352
3353 static struct bfd_link_hash_table *
3354 ppc_elf_link_hash_table_create (bfd *abfd)
3355 {
3356 struct ppc_elf_link_hash_table *ret;
3357 static struct ppc_elf_params default_params
3358 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3359
3360 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3361 if (ret == NULL)
3362 return NULL;
3363
3364 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3365 ppc_elf_link_hash_newfunc,
3366 sizeof (struct ppc_elf_link_hash_entry),
3367 PPC32_ELF_DATA))
3368 {
3369 free (ret);
3370 return NULL;
3371 }
3372
3373 ret->elf.init_plt_refcount.refcount = 0;
3374 ret->elf.init_plt_refcount.glist = NULL;
3375 ret->elf.init_plt_offset.offset = 0;
3376 ret->elf.init_plt_offset.glist = NULL;
3377
3378 ret->params = &default_params;
3379
3380 ret->sdata[0].name = ".sdata";
3381 ret->sdata[0].sym_name = "_SDA_BASE_";
3382 ret->sdata[0].bss_name = ".sbss";
3383
3384 ret->sdata[1].name = ".sdata2";
3385 ret->sdata[1].sym_name = "_SDA2_BASE_";
3386 ret->sdata[1].bss_name = ".sbss2";
3387
3388 ret->plt_entry_size = 12;
3389 ret->plt_slot_size = 8;
3390 ret->plt_initial_entry_size = 72;
3391
3392 return &ret->elf.root;
3393 }
3394
3395 /* Hook linker params into hash table. */
3396
3397 void
3398 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3399 {
3400 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3401
3402 if (htab)
3403 htab->params = params;
3404 params->pagesize_p2 = bfd_log2 (params->pagesize);
3405 }
3406
3407 /* Create .got and the related sections. */
3408
3409 static bfd_boolean
3410 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3411 {
3412 struct ppc_elf_link_hash_table *htab;
3413
3414 if (!_bfd_elf_create_got_section (abfd, info))
3415 return FALSE;
3416
3417 htab = ppc_elf_hash_table (info);
3418 if (!htab->is_vxworks)
3419 {
3420 /* The powerpc .got has a blrl instruction in it. Mark it
3421 executable. */
3422 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3423 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3424 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3425 return FALSE;
3426 }
3427
3428 return TRUE;
3429 }
3430
3431 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3432 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3433 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3434
3435 static bfd_boolean
3436 ppc_elf_create_linker_section (bfd *abfd,
3437 struct bfd_link_info *info,
3438 flagword flags,
3439 elf_linker_section_t *lsect)
3440 {
3441 asection *s;
3442
3443 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3444 | SEC_LINKER_CREATED);
3445
3446 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3447 if (s == NULL)
3448 return FALSE;
3449 lsect->section = s;
3450
3451 /* Define the sym on the first section of this name. */
3452 s = bfd_get_section_by_name (abfd, lsect->name);
3453
3454 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3455 if (lsect->sym == NULL)
3456 return FALSE;
3457 lsect->sym->root.u.def.value = 0x8000;
3458 return TRUE;
3459 }
3460
3461 static bfd_boolean
3462 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3463 {
3464 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3465 asection *s;
3466 flagword flags;
3467
3468 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3469 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3470 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3471 htab->glink = s;
3472 if (s == NULL
3473 || !bfd_set_section_alignment (abfd, s,
3474 htab->params->ppc476_workaround ? 6 : 4))
3475 return FALSE;
3476
3477 if (!info->no_ld_generated_unwind_info)
3478 {
3479 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3480 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3481 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3482 htab->glink_eh_frame = s;
3483 if (s == NULL
3484 || !bfd_set_section_alignment (abfd, s, 2))
3485 return FALSE;
3486 }
3487
3488 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3489 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3490 htab->elf.iplt = s;
3491 if (s == NULL
3492 || !bfd_set_section_alignment (abfd, s, 4))
3493 return FALSE;
3494
3495 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3497 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3498 htab->elf.irelplt = s;
3499 if (s == NULL
3500 || ! bfd_set_section_alignment (abfd, s, 2))
3501 return FALSE;
3502
3503 if (!ppc_elf_create_linker_section (abfd, info, 0,
3504 &htab->sdata[0]))
3505 return FALSE;
3506
3507 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3508 &htab->sdata[1]))
3509 return FALSE;
3510
3511 return TRUE;
3512 }
3513
3514 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3515 to output sections (just like _bfd_elf_create_dynamic_sections has
3516 to create .dynbss and .rela.bss). */
3517
3518 static bfd_boolean
3519 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3520 {
3521 struct ppc_elf_link_hash_table *htab;
3522 asection *s;
3523 flagword flags;
3524
3525 htab = ppc_elf_hash_table (info);
3526
3527 if (htab->elf.sgot == NULL
3528 && !ppc_elf_create_got (abfd, info))
3529 return FALSE;
3530
3531 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3532 return FALSE;
3533
3534 if (htab->glink == NULL
3535 && !ppc_elf_create_glink (abfd, info))
3536 return FALSE;
3537
3538 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3539 SEC_ALLOC | SEC_LINKER_CREATED);
3540 htab->dynsbss = s;
3541 if (s == NULL)
3542 return FALSE;
3543
3544 if (! bfd_link_pic (info))
3545 {
3546 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3547 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3548 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3549 htab->relsbss = s;
3550 if (s == NULL
3551 || ! bfd_set_section_alignment (abfd, s, 2))
3552 return FALSE;
3553 }
3554
3555 if (htab->is_vxworks
3556 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3557 return FALSE;
3558
3559 s = htab->elf.splt;
3560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3561 if (htab->plt_type == PLT_VXWORKS)
3562 /* The VxWorks PLT is a loaded section with contents. */
3563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3564 return bfd_set_section_flags (abfd, s, flags);
3565 }
3566
3567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3568
3569 static void
3570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3571 struct elf_link_hash_entry *dir,
3572 struct elf_link_hash_entry *ind)
3573 {
3574 struct ppc_elf_link_hash_entry *edir, *eind;
3575
3576 edir = (struct ppc_elf_link_hash_entry *) dir;
3577 eind = (struct ppc_elf_link_hash_entry *) ind;
3578
3579 edir->tls_mask |= eind->tls_mask;
3580 edir->has_sda_refs |= eind->has_sda_refs;
3581
3582 if (edir->elf.versioned != versioned_hidden)
3583 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3584 edir->elf.ref_regular |= eind->elf.ref_regular;
3585 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3586 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3587 edir->elf.needs_plt |= eind->elf.needs_plt;
3588 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3589
3590 /* If we were called to copy over info for a weak sym, that's all. */
3591 if (eind->elf.root.type != bfd_link_hash_indirect)
3592 return;
3593
3594 if (eind->dyn_relocs != NULL)
3595 {
3596 if (edir->dyn_relocs != NULL)
3597 {
3598 struct elf_dyn_relocs **pp;
3599 struct elf_dyn_relocs *p;
3600
3601 /* Add reloc counts against the indirect sym to the direct sym
3602 list. Merge any entries against the same section. */
3603 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3604 {
3605 struct elf_dyn_relocs *q;
3606
3607 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3608 if (q->sec == p->sec)
3609 {
3610 q->pc_count += p->pc_count;
3611 q->count += p->count;
3612 *pp = p->next;
3613 break;
3614 }
3615 if (q == NULL)
3616 pp = &p->next;
3617 }
3618 *pp = edir->dyn_relocs;
3619 }
3620
3621 edir->dyn_relocs = eind->dyn_relocs;
3622 eind->dyn_relocs = NULL;
3623 }
3624
3625 /* Copy over the GOT refcount entries that we may have already seen to
3626 the symbol which just became indirect. */
3627 edir->elf.got.refcount += eind->elf.got.refcount;
3628 eind->elf.got.refcount = 0;
3629
3630 /* And plt entries. */
3631 if (eind->elf.plt.plist != NULL)
3632 {
3633 if (edir->elf.plt.plist != NULL)
3634 {
3635 struct plt_entry **entp;
3636 struct plt_entry *ent;
3637
3638 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3639 {
3640 struct plt_entry *dent;
3641
3642 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3643 if (dent->sec == ent->sec && dent->addend == ent->addend)
3644 {
3645 dent->plt.refcount += ent->plt.refcount;
3646 *entp = ent->next;
3647 break;
3648 }
3649 if (dent == NULL)
3650 entp = &ent->next;
3651 }
3652 *entp = edir->elf.plt.plist;
3653 }
3654
3655 edir->elf.plt.plist = eind->elf.plt.plist;
3656 eind->elf.plt.plist = NULL;
3657 }
3658
3659 if (eind->elf.dynindx != -1)
3660 {
3661 if (edir->elf.dynindx != -1)
3662 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3663 edir->elf.dynstr_index);
3664 edir->elf.dynindx = eind->elf.dynindx;
3665 edir->elf.dynstr_index = eind->elf.dynstr_index;
3666 eind->elf.dynindx = -1;
3667 eind->elf.dynstr_index = 0;
3668 }
3669 }
3670
3671 /* Hook called by the linker routine which adds symbols from an object
3672 file. We use it to put .comm items in .sbss, and not .bss. */
3673
3674 static bfd_boolean
3675 ppc_elf_add_symbol_hook (bfd *abfd,
3676 struct bfd_link_info *info,
3677 Elf_Internal_Sym *sym,
3678 const char **namep ATTRIBUTE_UNUSED,
3679 flagword *flagsp ATTRIBUTE_UNUSED,
3680 asection **secp,
3681 bfd_vma *valp)
3682 {
3683 if (sym->st_shndx == SHN_COMMON
3684 && !bfd_link_relocatable (info)
3685 && is_ppc_elf (info->output_bfd)
3686 && sym->st_size <= elf_gp_size (abfd))
3687 {
3688 /* Common symbols less than or equal to -G nn bytes are automatically
3689 put into .sbss. */
3690 struct ppc_elf_link_hash_table *htab;
3691
3692 htab = ppc_elf_hash_table (info);
3693 if (htab->sbss == NULL)
3694 {
3695 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3696
3697 if (!htab->elf.dynobj)
3698 htab->elf.dynobj = abfd;
3699
3700 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3701 ".sbss",
3702 flags);
3703 if (htab->sbss == NULL)
3704 return FALSE;
3705 }
3706
3707 *secp = htab->sbss;
3708 *valp = sym->st_size;
3709 }
3710
3711 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3712 && (abfd->flags & DYNAMIC) == 0
3713 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3714 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3715
3716 return TRUE;
3717 }
3718 \f
3719 /* Find a linker generated pointer with a given addend and type. */
3720
3721 static elf_linker_section_pointers_t *
3722 elf_find_pointer_linker_section
3723 (elf_linker_section_pointers_t *linker_pointers,
3724 bfd_vma addend,
3725 elf_linker_section_t *lsect)
3726 {
3727 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3728 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3729 return linker_pointers;
3730
3731 return NULL;
3732 }
3733
3734 /* Allocate a pointer to live in a linker created section. */
3735
3736 static bfd_boolean
3737 elf_allocate_pointer_linker_section (bfd *abfd,
3738 elf_linker_section_t *lsect,
3739 struct elf_link_hash_entry *h,
3740 const Elf_Internal_Rela *rel)
3741 {
3742 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3743 elf_linker_section_pointers_t *linker_section_ptr;
3744 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3745 bfd_size_type amt;
3746
3747 BFD_ASSERT (lsect != NULL);
3748
3749 /* Is this a global symbol? */
3750 if (h != NULL)
3751 {
3752 struct ppc_elf_link_hash_entry *eh;
3753
3754 /* Has this symbol already been allocated? If so, our work is done. */
3755 eh = (struct ppc_elf_link_hash_entry *) h;
3756 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3757 rel->r_addend,
3758 lsect))
3759 return TRUE;
3760
3761 ptr_linker_section_ptr = &eh->linker_section_pointer;
3762 }
3763 else
3764 {
3765 BFD_ASSERT (is_ppc_elf (abfd));
3766
3767 /* Allocation of a pointer to a local symbol. */
3768 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3769
3770 /* Allocate a table to hold the local symbols if first time. */
3771 if (!ptr)
3772 {
3773 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3774
3775 amt = num_symbols;
3776 amt *= sizeof (elf_linker_section_pointers_t *);
3777 ptr = bfd_zalloc (abfd, amt);
3778
3779 if (!ptr)
3780 return FALSE;
3781
3782 elf_local_ptr_offsets (abfd) = ptr;
3783 }
3784
3785 /* Has this symbol already been allocated? If so, our work is done. */
3786 if (elf_find_pointer_linker_section (ptr[r_symndx],
3787 rel->r_addend,
3788 lsect))
3789 return TRUE;
3790
3791 ptr_linker_section_ptr = &ptr[r_symndx];
3792 }
3793
3794 /* Allocate space for a pointer in the linker section, and allocate
3795 a new pointer record from internal memory. */
3796 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3797 amt = sizeof (elf_linker_section_pointers_t);
3798 linker_section_ptr = bfd_alloc (abfd, amt);
3799
3800 if (!linker_section_ptr)
3801 return FALSE;
3802
3803 linker_section_ptr->next = *ptr_linker_section_ptr;
3804 linker_section_ptr->addend = rel->r_addend;
3805 linker_section_ptr->lsect = lsect;
3806 *ptr_linker_section_ptr = linker_section_ptr;
3807
3808 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3809 return FALSE;
3810 linker_section_ptr->offset = lsect->section->size;
3811 lsect->section->size += 4;
3812
3813 #ifdef DEBUG
3814 fprintf (stderr,
3815 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3816 lsect->name, (long) linker_section_ptr->offset,
3817 (long) lsect->section->size);
3818 #endif
3819
3820 return TRUE;
3821 }
3822
3823 static struct plt_entry **
3824 update_local_sym_info (bfd *abfd,
3825 Elf_Internal_Shdr *symtab_hdr,
3826 unsigned long r_symndx,
3827 int tls_type)
3828 {
3829 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3830 struct plt_entry **local_plt;
3831 char *local_got_tls_masks;
3832
3833 if (local_got_refcounts == NULL)
3834 {
3835 bfd_size_type size = symtab_hdr->sh_info;
3836
3837 size *= (sizeof (*local_got_refcounts)
3838 + sizeof (*local_plt)
3839 + sizeof (*local_got_tls_masks));
3840 local_got_refcounts = bfd_zalloc (abfd, size);
3841 if (local_got_refcounts == NULL)
3842 return NULL;
3843 elf_local_got_refcounts (abfd) = local_got_refcounts;
3844 }
3845
3846 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3847 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3848 local_got_tls_masks[r_symndx] |= tls_type;
3849 if (tls_type != PLT_IFUNC)
3850 local_got_refcounts[r_symndx] += 1;
3851 return local_plt + r_symndx;
3852 }
3853
3854 static bfd_boolean
3855 update_plt_info (bfd *abfd, struct plt_entry **plist,
3856 asection *sec, bfd_vma addend)
3857 {
3858 struct plt_entry *ent;
3859
3860 if (addend < 32768)
3861 sec = NULL;
3862 for (ent = *plist; ent != NULL; ent = ent->next)
3863 if (ent->sec == sec && ent->addend == addend)
3864 break;
3865 if (ent == NULL)
3866 {
3867 bfd_size_type amt = sizeof (*ent);
3868 ent = bfd_alloc (abfd, amt);
3869 if (ent == NULL)
3870 return FALSE;
3871 ent->next = *plist;
3872 ent->sec = sec;
3873 ent->addend = addend;
3874 ent->plt.refcount = 0;
3875 *plist = ent;
3876 }
3877 ent->plt.refcount += 1;
3878 return TRUE;
3879 }
3880
3881 static struct plt_entry *
3882 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3883 {
3884 struct plt_entry *ent;
3885
3886 if (addend < 32768)
3887 sec = NULL;
3888 for (ent = *plist; ent != NULL; ent = ent->next)
3889 if (ent->sec == sec && ent->addend == addend)
3890 break;
3891 return ent;
3892 }
3893
3894 static bfd_boolean
3895 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3896 {
3897 return (r_type == R_PPC_PLTREL24
3898 || r_type == R_PPC_LOCAL24PC
3899 || r_type == R_PPC_REL24
3900 || r_type == R_PPC_REL14
3901 || r_type == R_PPC_REL14_BRTAKEN
3902 || r_type == R_PPC_REL14_BRNTAKEN
3903 || r_type == R_PPC_ADDR24
3904 || r_type == R_PPC_ADDR14
3905 || r_type == R_PPC_ADDR14_BRTAKEN
3906 || r_type == R_PPC_ADDR14_BRNTAKEN
3907 || r_type == R_PPC_VLE_REL24);
3908 }
3909
3910 static void
3911 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3912 {
3913 _bfd_error_handler
3914 /* xgettext:c-format */
3915 (_("%B: relocation %s cannot be used when making a shared object"),
3916 abfd,
3917 ppc_elf_howto_table[r_type]->name);
3918 bfd_set_error (bfd_error_bad_value);
3919 }
3920
3921 /* Look through the relocs for a section during the first phase, and
3922 allocate space in the global offset table or procedure linkage
3923 table. */
3924
3925 static bfd_boolean
3926 ppc_elf_check_relocs (bfd *abfd,
3927 struct bfd_link_info *info,
3928 asection *sec,
3929 const Elf_Internal_Rela *relocs)
3930 {
3931 struct ppc_elf_link_hash_table *htab;
3932 Elf_Internal_Shdr *symtab_hdr;
3933 struct elf_link_hash_entry **sym_hashes;
3934 const Elf_Internal_Rela *rel;
3935 const Elf_Internal_Rela *rel_end;
3936 asection *got2, *sreloc;
3937 struct elf_link_hash_entry *tga;
3938
3939 if (bfd_link_relocatable (info))
3940 return TRUE;
3941
3942 /* Don't do anything special with non-loaded, non-alloced sections.
3943 In particular, any relocs in such sections should not affect GOT
3944 and PLT reference counting (ie. we don't allow them to create GOT
3945 or PLT entries), there's no possibility or desire to optimize TLS
3946 relocs, and there's not much point in propagating relocs to shared
3947 libs that the dynamic linker won't relocate. */
3948 if ((sec->flags & SEC_ALLOC) == 0)
3949 return TRUE;
3950
3951 #ifdef DEBUG
3952 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3953 sec, abfd);
3954 #endif
3955
3956 BFD_ASSERT (is_ppc_elf (abfd));
3957
3958 /* Initialize howto table if not already done. */
3959 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3960 ppc_elf_howto_init ();
3961
3962 htab = ppc_elf_hash_table (info);
3963 if (htab->glink == NULL)
3964 {
3965 if (htab->elf.dynobj == NULL)
3966 htab->elf.dynobj = abfd;
3967 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3968 return FALSE;
3969 }
3970 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3971 FALSE, FALSE, TRUE);
3972 symtab_hdr = &elf_symtab_hdr (abfd);
3973 sym_hashes = elf_sym_hashes (abfd);
3974 got2 = bfd_get_section_by_name (abfd, ".got2");
3975 sreloc = NULL;
3976
3977 rel_end = relocs + sec->reloc_count;
3978 for (rel = relocs; rel < rel_end; rel++)
3979 {
3980 unsigned long r_symndx;
3981 enum elf_ppc_reloc_type r_type;
3982 struct elf_link_hash_entry *h;
3983 int tls_type;
3984 struct plt_entry **ifunc;
3985
3986 r_symndx = ELF32_R_SYM (rel->r_info);
3987 if (r_symndx < symtab_hdr->sh_info)
3988 h = NULL;
3989 else
3990 {
3991 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3992 while (h->root.type == bfd_link_hash_indirect
3993 || h->root.type == bfd_link_hash_warning)
3994 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3995 }
3996
3997 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3998 This shows up in particular in an R_PPC_ADDR32 in the eabi
3999 startup code. */
4000 if (h != NULL
4001 && htab->elf.sgot == NULL
4002 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4003 {
4004 if (htab->elf.dynobj == NULL)
4005 htab->elf.dynobj = abfd;
4006 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4007 return FALSE;
4008 BFD_ASSERT (h == htab->elf.hgot);
4009 }
4010
4011 tls_type = 0;
4012 r_type = ELF32_R_TYPE (rel->r_info);
4013 ifunc = NULL;
4014 if (h == NULL && !htab->is_vxworks)
4015 {
4016 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4017 abfd, r_symndx);
4018 if (isym == NULL)
4019 return FALSE;
4020
4021 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4022 {
4023 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4024 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4025 PLT_IFUNC);
4026 if (ifunc == NULL)
4027 return FALSE;
4028
4029 /* STT_GNU_IFUNC symbols must have a PLT entry;
4030 In a non-pie executable even when there are
4031 no plt calls. */
4032 if (!bfd_link_pic (info)
4033 || is_branch_reloc (r_type))
4034 {
4035 bfd_vma addend = 0;
4036 if (r_type == R_PPC_PLTREL24)
4037 {
4038 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4039 if (bfd_link_pic (info))
4040 addend = rel->r_addend;
4041 }
4042 if (!update_plt_info (abfd, ifunc, got2, addend))
4043 return FALSE;
4044 }
4045 }
4046 }
4047
4048 if (!htab->is_vxworks
4049 && is_branch_reloc (r_type)
4050 && h != NULL
4051 && h == tga)
4052 {
4053 if (rel != relocs
4054 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4055 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4056 /* We have a new-style __tls_get_addr call with a marker
4057 reloc. */
4058 ;
4059 else
4060 /* Mark this section as having an old-style call. */
4061 sec->has_tls_get_addr_call = 1;
4062 }
4063
4064 switch (r_type)
4065 {
4066 case R_PPC_TLSGD:
4067 case R_PPC_TLSLD:
4068 /* These special tls relocs tie a call to __tls_get_addr with
4069 its parameter symbol. */
4070 break;
4071
4072 case R_PPC_GOT_TLSLD16:
4073 case R_PPC_GOT_TLSLD16_LO:
4074 case R_PPC_GOT_TLSLD16_HI:
4075 case R_PPC_GOT_TLSLD16_HA:
4076 tls_type = TLS_TLS | TLS_LD;
4077 goto dogottls;
4078
4079 case R_PPC_GOT_TLSGD16:
4080 case R_PPC_GOT_TLSGD16_LO:
4081 case R_PPC_GOT_TLSGD16_HI:
4082 case R_PPC_GOT_TLSGD16_HA:
4083 tls_type = TLS_TLS | TLS_GD;
4084 goto dogottls;
4085
4086 case R_PPC_GOT_TPREL16:
4087 case R_PPC_GOT_TPREL16_LO:
4088 case R_PPC_GOT_TPREL16_HI:
4089 case R_PPC_GOT_TPREL16_HA:
4090 if (bfd_link_dll (info))
4091 info->flags |= DF_STATIC_TLS;
4092 tls_type = TLS_TLS | TLS_TPREL;
4093 goto dogottls;
4094
4095 case R_PPC_GOT_DTPREL16:
4096 case R_PPC_GOT_DTPREL16_LO:
4097 case R_PPC_GOT_DTPREL16_HI:
4098 case R_PPC_GOT_DTPREL16_HA:
4099 tls_type = TLS_TLS | TLS_DTPREL;
4100 dogottls:
4101 sec->has_tls_reloc = 1;
4102 /* Fall through. */
4103
4104 /* GOT16 relocations */
4105 case R_PPC_GOT16:
4106 case R_PPC_GOT16_LO:
4107 case R_PPC_GOT16_HI:
4108 case R_PPC_GOT16_HA:
4109 /* This symbol requires a global offset table entry. */
4110 if (htab->elf.sgot == NULL)
4111 {
4112 if (htab->elf.dynobj == NULL)
4113 htab->elf.dynobj = abfd;
4114 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4115 return FALSE;
4116 }
4117 if (h != NULL)
4118 {
4119 h->got.refcount += 1;
4120 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4121 }
4122 else
4123 /* This is a global offset table entry for a local symbol. */
4124 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4125 return FALSE;
4126
4127 /* We may also need a plt entry if the symbol turns out to be
4128 an ifunc. */
4129 if (h != NULL && !bfd_link_pic (info))
4130 {
4131 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4132 return FALSE;
4133 }
4134 break;
4135
4136 /* Indirect .sdata relocation. */
4137 case R_PPC_EMB_SDAI16:
4138 if (bfd_link_pic (info))
4139 {
4140 bad_shared_reloc (abfd, r_type);
4141 return FALSE;
4142 }
4143 htab->sdata[0].sym->ref_regular = 1;
4144 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4145 h, rel))
4146 return FALSE;
4147 if (h != NULL)
4148 {
4149 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4150 h->non_got_ref = TRUE;
4151 }
4152 break;
4153
4154 /* Indirect .sdata2 relocation. */
4155 case R_PPC_EMB_SDA2I16:
4156 if (bfd_link_pic (info))
4157 {
4158 bad_shared_reloc (abfd, r_type);
4159 return FALSE;
4160 }
4161 htab->sdata[1].sym->ref_regular = 1;
4162 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4163 h, rel))
4164 return FALSE;
4165 if (h != NULL)
4166 {
4167 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4168 h->non_got_ref = TRUE;
4169 }
4170 break;
4171
4172 case R_PPC_SDAREL16:
4173 htab->sdata[0].sym->ref_regular = 1;
4174 /* Fall through. */
4175
4176 case R_PPC_VLE_SDAREL_LO16A:
4177 case R_PPC_VLE_SDAREL_LO16D:
4178 case R_PPC_VLE_SDAREL_HI16A:
4179 case R_PPC_VLE_SDAREL_HI16D:
4180 case R_PPC_VLE_SDAREL_HA16A:
4181 case R_PPC_VLE_SDAREL_HA16D:
4182 if (h != NULL)
4183 {
4184 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4185 h->non_got_ref = TRUE;
4186 }
4187 break;
4188
4189 case R_PPC_VLE_REL8:
4190 case R_PPC_VLE_REL15:
4191 case R_PPC_VLE_REL24:
4192 case R_PPC_VLE_LO16A:
4193 case R_PPC_VLE_LO16D:
4194 case R_PPC_VLE_HI16A:
4195 case R_PPC_VLE_HI16D:
4196 case R_PPC_VLE_HA16A:
4197 case R_PPC_VLE_HA16D:
4198 case R_PPC_VLE_ADDR20:
4199 break;
4200
4201 case R_PPC_EMB_SDA2REL:
4202 if (bfd_link_pic (info))
4203 {
4204 bad_shared_reloc (abfd, r_type);
4205 return FALSE;
4206 }
4207 htab->sdata[1].sym->ref_regular = 1;
4208 if (h != NULL)
4209 {
4210 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4211 h->non_got_ref = TRUE;
4212 }
4213 break;
4214
4215 case R_PPC_VLE_SDA21_LO:
4216 case R_PPC_VLE_SDA21:
4217 case R_PPC_EMB_SDA21:
4218 case R_PPC_EMB_RELSDA:
4219 if (bfd_link_pic (info))
4220 {
4221 bad_shared_reloc (abfd, r_type);
4222 return FALSE;
4223 }
4224 if (h != NULL)
4225 {
4226 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4227 h->non_got_ref = TRUE;
4228 }
4229 break;
4230
4231 case R_PPC_EMB_NADDR32:
4232 case R_PPC_EMB_NADDR16:
4233 case R_PPC_EMB_NADDR16_LO:
4234 case R_PPC_EMB_NADDR16_HI:
4235 case R_PPC_EMB_NADDR16_HA:
4236 if (bfd_link_pic (info))
4237 {
4238 bad_shared_reloc (abfd, r_type);
4239 return FALSE;
4240 }
4241 if (h != NULL)
4242 h->non_got_ref = TRUE;
4243 break;
4244
4245 case R_PPC_PLTREL24:
4246 if (h == NULL)
4247 break;
4248 /* Fall through */
4249 case R_PPC_PLT32:
4250 case R_PPC_PLTREL32:
4251 case R_PPC_PLT16_LO:
4252 case R_PPC_PLT16_HI:
4253 case R_PPC_PLT16_HA:
4254 #ifdef DEBUG
4255 fprintf (stderr, "Reloc requires a PLT entry\n");
4256 #endif
4257 /* This symbol requires a procedure linkage table entry. */
4258 if (h == NULL)
4259 {
4260 if (ifunc == NULL)
4261 {
4262 /* It does not make sense to have a procedure linkage
4263 table entry for a non-ifunc local symbol. */
4264 info->callbacks->einfo
4265 /* xgettext:c-format */
4266 (_("%H: %s reloc against local symbol\n"),
4267 abfd, sec, rel->r_offset,
4268 ppc_elf_howto_table[r_type]->name);
4269 bfd_set_error (bfd_error_bad_value);
4270 return FALSE;
4271 }
4272 }
4273 else
4274 {
4275 bfd_vma addend = 0;
4276
4277 if (r_type == R_PPC_PLTREL24)
4278 {
4279 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4280 if (bfd_link_pic (info))
4281 addend = rel->r_addend;
4282 }
4283 h->needs_plt = 1;
4284 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4285 return FALSE;
4286 }
4287 break;
4288
4289 /* The following relocations don't need to propagate the
4290 relocation if linking a shared object since they are
4291 section relative. */
4292 case R_PPC_SECTOFF:
4293 case R_PPC_SECTOFF_LO:
4294 case R_PPC_SECTOFF_HI:
4295 case R_PPC_SECTOFF_HA:
4296 case R_PPC_DTPREL16:
4297 case R_PPC_DTPREL16_LO:
4298 case R_PPC_DTPREL16_HI:
4299 case R_PPC_DTPREL16_HA:
4300 case R_PPC_TOC16:
4301 break;
4302
4303 case R_PPC_REL16:
4304 case R_PPC_REL16_LO:
4305 case R_PPC_REL16_HI:
4306 case R_PPC_REL16_HA:
4307 case R_PPC_REL16DX_HA:
4308 ppc_elf_tdata (abfd)->has_rel16 = 1;
4309 break;
4310
4311 /* These are just markers. */
4312 case R_PPC_TLS:
4313 case R_PPC_EMB_MRKREF:
4314 case R_PPC_NONE:
4315 case R_PPC_max:
4316 case R_PPC_RELAX:
4317 case R_PPC_RELAX_PLT:
4318 case R_PPC_RELAX_PLTREL24:
4319 case R_PPC_16DX_HA:
4320 break;
4321
4322 /* These should only appear in dynamic objects. */
4323 case R_PPC_COPY:
4324 case R_PPC_GLOB_DAT:
4325 case R_PPC_JMP_SLOT:
4326 case R_PPC_RELATIVE:
4327 case R_PPC_IRELATIVE:
4328 break;
4329
4330 /* These aren't handled yet. We'll report an error later. */
4331 case R_PPC_ADDR30:
4332 case R_PPC_EMB_RELSEC16:
4333 case R_PPC_EMB_RELST_LO:
4334 case R_PPC_EMB_RELST_HI:
4335 case R_PPC_EMB_RELST_HA:
4336 case R_PPC_EMB_BIT_FLD:
4337 break;
4338
4339 /* This refers only to functions defined in the shared library. */
4340 case R_PPC_LOCAL24PC:
4341 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4342 {
4343 htab->plt_type = PLT_OLD;
4344 htab->old_bfd = abfd;
4345 }
4346 if (h != NULL && h->type == STT_GNU_IFUNC)
4347 {
4348 h->needs_plt = 1;
4349 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4350 return FALSE;
4351 }
4352 break;
4353
4354 /* This relocation describes the C++ object vtable hierarchy.
4355 Reconstruct it for later use during GC. */
4356 case R_PPC_GNU_VTINHERIT:
4357 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4358 return FALSE;
4359 break;
4360
4361 /* This relocation describes which C++ vtable entries are actually
4362 used. Record for later use during GC. */
4363 case R_PPC_GNU_VTENTRY:
4364 BFD_ASSERT (h != NULL);
4365 if (h != NULL
4366 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4367 return FALSE;
4368 break;
4369
4370 /* We shouldn't really be seeing TPREL32. */
4371 case R_PPC_TPREL32:
4372 case R_PPC_TPREL16:
4373 case R_PPC_TPREL16_LO:
4374 case R_PPC_TPREL16_HI:
4375 case R_PPC_TPREL16_HA:
4376 if (bfd_link_dll (info))
4377 info->flags |= DF_STATIC_TLS;
4378 goto dodyn;
4379
4380 /* Nor these. */
4381 case R_PPC_DTPMOD32:
4382 case R_PPC_DTPREL32:
4383 goto dodyn;
4384
4385 case R_PPC_REL32:
4386 if (h == NULL
4387 && got2 != NULL
4388 && (sec->flags & SEC_CODE) != 0
4389 && bfd_link_pic (info)
4390 && htab->plt_type == PLT_UNSET)
4391 {
4392 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4393 the start of a function, which assembles to a REL32
4394 reference to .got2. If we detect one of these, then
4395 force the old PLT layout because the linker cannot
4396 reliably deduce the GOT pointer value needed for
4397 PLT call stubs. */
4398 asection *s;
4399 Elf_Internal_Sym *isym;
4400
4401 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4402 abfd, r_symndx);
4403 if (isym == NULL)
4404 return FALSE;
4405
4406 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4407 if (s == got2)
4408 {
4409 htab->plt_type = PLT_OLD;
4410 htab->old_bfd = abfd;
4411 }
4412 }
4413 if (h == NULL || h == htab->elf.hgot)
4414 break;
4415 /* fall through */
4416
4417 case R_PPC_ADDR32:
4418 case R_PPC_ADDR16:
4419 case R_PPC_ADDR16_LO:
4420 case R_PPC_ADDR16_HI:
4421 case R_PPC_ADDR16_HA:
4422 case R_PPC_UADDR32:
4423 case R_PPC_UADDR16:
4424 if (h != NULL && !bfd_link_pic (info))
4425 {
4426 /* We may need a plt entry if the symbol turns out to be
4427 a function defined in a dynamic object. */
4428 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4429 return FALSE;
4430
4431 /* We may need a copy reloc too. */
4432 h->non_got_ref = 1;
4433 h->pointer_equality_needed = 1;
4434 if (r_type == R_PPC_ADDR16_HA)
4435 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4436 if (r_type == R_PPC_ADDR16_LO)
4437 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4438 }
4439 goto dodyn;
4440
4441 case R_PPC_REL24:
4442 case R_PPC_REL14:
4443 case R_PPC_REL14_BRTAKEN:
4444 case R_PPC_REL14_BRNTAKEN:
4445 if (h == NULL)
4446 break;
4447 if (h == htab->elf.hgot)
4448 {
4449 if (htab->plt_type == PLT_UNSET)
4450 {
4451 htab->plt_type = PLT_OLD;
4452 htab->old_bfd = abfd;
4453 }
4454 break;
4455 }
4456 /* fall through */
4457
4458 case R_PPC_ADDR24:
4459 case R_PPC_ADDR14:
4460 case R_PPC_ADDR14_BRTAKEN:
4461 case R_PPC_ADDR14_BRNTAKEN:
4462 if (h != NULL && !bfd_link_pic (info))
4463 {
4464 /* We may need a plt entry if the symbol turns out to be
4465 a function defined in a dynamic object. */
4466 h->needs_plt = 1;
4467 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4468 return FALSE;
4469 break;
4470 }
4471
4472 dodyn:
4473 /* If we are creating a shared library, and this is a reloc
4474 against a global symbol, or a non PC relative reloc
4475 against a local symbol, then we need to copy the reloc
4476 into the shared library. However, if we are linking with
4477 -Bsymbolic, we do not need to copy a reloc against a
4478 global symbol which is defined in an object we are
4479 including in the link (i.e., DEF_REGULAR is set). At
4480 this point we have not seen all the input files, so it is
4481 possible that DEF_REGULAR is not set now but will be set
4482 later (it is never cleared). In case of a weak definition,
4483 DEF_REGULAR may be cleared later by a strong definition in
4484 a shared library. We account for that possibility below by
4485 storing information in the dyn_relocs field of the hash
4486 table entry. A similar situation occurs when creating
4487 shared libraries and symbol visibility changes render the
4488 symbol local.
4489
4490 If on the other hand, we are creating an executable, we
4491 may need to keep relocations for symbols satisfied by a
4492 dynamic library if we manage to avoid copy relocs for the
4493 symbol. */
4494 if ((bfd_link_pic (info)
4495 && (must_be_dyn_reloc (info, r_type)
4496 || (h != NULL
4497 && (!SYMBOLIC_BIND (info, h)
4498 || h->root.type == bfd_link_hash_defweak
4499 || !h->def_regular))))
4500 || (ELIMINATE_COPY_RELOCS
4501 && !bfd_link_pic (info)
4502 && h != NULL
4503 && (h->root.type == bfd_link_hash_defweak
4504 || !h->def_regular)))
4505 {
4506 #ifdef DEBUG
4507 fprintf (stderr,
4508 "ppc_elf_check_relocs needs to "
4509 "create relocation for %s\n",
4510 (h && h->root.root.string
4511 ? h->root.root.string : "<unknown>"));
4512 #endif
4513 if (sreloc == NULL)
4514 {
4515 if (htab->elf.dynobj == NULL)
4516 htab->elf.dynobj = abfd;
4517
4518 sreloc = _bfd_elf_make_dynamic_reloc_section
4519 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4520
4521 if (sreloc == NULL)
4522 return FALSE;
4523 }
4524
4525 /* If this is a global symbol, we count the number of
4526 relocations we need for this symbol. */
4527 if (h != NULL)
4528 {
4529 struct elf_dyn_relocs *p;
4530 struct elf_dyn_relocs **rel_head;
4531
4532 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4533 p = *rel_head;
4534 if (p == NULL || p->sec != sec)
4535 {
4536 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4537 if (p == NULL)
4538 return FALSE;
4539 p->next = *rel_head;
4540 *rel_head = p;
4541 p->sec = sec;
4542 p->count = 0;
4543 p->pc_count = 0;
4544 }
4545 p->count += 1;
4546 if (!must_be_dyn_reloc (info, r_type))
4547 p->pc_count += 1;
4548 }
4549 else
4550 {
4551 /* Track dynamic relocs needed for local syms too.
4552 We really need local syms available to do this
4553 easily. Oh well. */
4554 struct ppc_dyn_relocs *p;
4555 struct ppc_dyn_relocs **rel_head;
4556 bfd_boolean is_ifunc;
4557 asection *s;
4558 void *vpp;
4559 Elf_Internal_Sym *isym;
4560
4561 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4562 abfd, r_symndx);
4563 if (isym == NULL)
4564 return FALSE;
4565
4566 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4567 if (s == NULL)
4568 s = sec;
4569
4570 vpp = &elf_section_data (s)->local_dynrel;
4571 rel_head = (struct ppc_dyn_relocs **) vpp;
4572 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4573 p = *rel_head;
4574 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4575 p = p->next;
4576 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4577 {
4578 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4579 if (p == NULL)
4580 return FALSE;
4581 p->next = *rel_head;
4582 *rel_head = p;
4583 p->sec = sec;
4584 p->ifunc = is_ifunc;
4585 p->count = 0;
4586 }
4587 p->count += 1;
4588 }
4589 }
4590
4591 break;
4592 }
4593 }
4594
4595 return TRUE;
4596 }
4597 \f
4598 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4599 and OBFD, and merge non-conflicting ones. */
4600 void
4601 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4602 {
4603 bfd *obfd = info->output_bfd;
4604 obj_attribute *in_attr, *in_attrs;
4605 obj_attribute *out_attr, *out_attrs;
4606
4607 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4608 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4609
4610 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4611 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4612
4613 if (in_attr->i != out_attr->i)
4614 {
4615 int in_fp = in_attr->i & 3;
4616 int out_fp = out_attr->i & 3;
4617
4618 if (in_fp == 0)
4619 ;
4620 else if (out_fp == 0)
4621 {
4622 out_attr->type = 1;
4623 out_attr->i ^= in_fp;
4624 }
4625 else if (out_fp != 2 && in_fp == 2)
4626 _bfd_error_handler
4627 /* xgettext:c-format */
4628 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4629 else if (out_fp == 2 && in_fp != 2)
4630 _bfd_error_handler
4631 /* xgettext:c-format */
4632 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4633 else if (out_fp == 1 && in_fp == 3)
4634 _bfd_error_handler
4635 /* xgettext:c-format */
4636 (_("Warning: %B uses double-precision hard float, "
4637 "%B uses single-precision hard float"), obfd, ibfd);
4638 else if (out_fp == 3 && in_fp == 1)
4639 _bfd_error_handler
4640 /* xgettext:c-format */
4641 (_("Warning: %B uses double-precision hard float, "
4642 "%B uses single-precision hard float"), ibfd, obfd);
4643
4644 in_fp = in_attr->i & 0xc;
4645 out_fp = out_attr->i & 0xc;
4646 if (in_fp == 0)
4647 ;
4648 else if (out_fp == 0)
4649 {
4650 out_attr->type = 1;
4651 out_attr->i ^= in_fp;
4652 }
4653 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4654 _bfd_error_handler
4655 /* xgettext:c-format */
4656 (_("Warning: %B uses 64-bit long double, "
4657 "%B uses 128-bit long double"), ibfd, obfd);
4658 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4659 _bfd_error_handler
4660 /* xgettext:c-format */
4661 (_("Warning: %B uses 64-bit long double, "
4662 "%B uses 128-bit long double"), obfd, ibfd);
4663 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4664 _bfd_error_handler
4665 /* xgettext:c-format */
4666 (_("Warning: %B uses IBM long double, "
4667 "%B uses IEEE long double"), ibfd, obfd);
4668 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4669 _bfd_error_handler
4670 /* xgettext:c-format */
4671 (_("Warning: %B uses IBM long double, "
4672 "%B uses IEEE long double"), obfd, ibfd);
4673 }
4674 }
4675
4676 /* Merge object attributes from IBFD into OBFD. Warn if
4677 there are conflicting attributes. */
4678 static bfd_boolean
4679 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4680 {
4681 bfd *obfd;
4682 obj_attribute *in_attr, *in_attrs;
4683 obj_attribute *out_attr, *out_attrs;
4684
4685 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4686
4687 obfd = info->output_bfd;
4688 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4689 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4690
4691 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4692 merge non-conflicting ones. */
4693 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4694 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4695 if (in_attr->i != out_attr->i)
4696 {
4697 int in_vec = in_attr->i & 3;
4698 int out_vec = out_attr->i & 3;
4699
4700 if (in_vec == 0)
4701 ;
4702 else if (out_vec == 0)
4703 {
4704 out_attr->type = 1;
4705 out_attr->i = in_vec;
4706 }
4707 /* For now, allow generic to transition to AltiVec or SPE
4708 without a warning. If GCC marked files with their stack
4709 alignment and used don't-care markings for files which are
4710 not affected by the vector ABI, we could warn about this
4711 case too. */
4712 else if (in_vec == 1)
4713 ;
4714 else if (out_vec == 1)
4715 {
4716 out_attr->type = 1;
4717 out_attr->i = in_vec;
4718 }
4719 else if (out_vec < in_vec)
4720 _bfd_error_handler
4721 /* xgettext:c-format */
4722 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4723 obfd, ibfd);
4724 else if (out_vec > in_vec)
4725 _bfd_error_handler
4726 /* xgettext:c-format */
4727 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4728 ibfd, obfd);
4729 }
4730
4731 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4732 and merge non-conflicting ones. */
4733 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4734 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4735 if (in_attr->i != out_attr->i)
4736 {
4737 int in_struct = in_attr->i & 3;
4738 int out_struct = out_attr->i & 3;
4739
4740 if (in_struct == 0 || in_struct == 3)
4741 ;
4742 else if (out_struct == 0)
4743 {
4744 out_attr->type = 1;
4745 out_attr->i = in_struct;
4746 }
4747 else if (out_struct < in_struct)
4748 _bfd_error_handler
4749 /* xgettext:c-format */
4750 (_("Warning: %B uses r3/r4 for small structure returns, "
4751 "%B uses memory"), obfd, ibfd);
4752 else if (out_struct > in_struct)
4753 _bfd_error_handler
4754 /* xgettext:c-format */
4755 (_("Warning: %B uses r3/r4 for small structure returns, "
4756 "%B uses memory"), ibfd, obfd);
4757 }
4758
4759 /* Merge Tag_compatibility attributes and any common GNU ones. */
4760 _bfd_elf_merge_object_attributes (ibfd, info);
4761
4762 return TRUE;
4763 }
4764
4765 /* Merge backend specific data from an object file to the output
4766 object file when linking. */
4767
4768 static bfd_boolean
4769 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4770 {
4771 bfd *obfd = info->output_bfd;
4772 flagword old_flags;
4773 flagword new_flags;
4774 bfd_boolean error;
4775
4776 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4777 return TRUE;
4778
4779 /* Check if we have the same endianness. */
4780 if (! _bfd_generic_verify_endian_match (ibfd, info))
4781 return FALSE;
4782
4783 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4784 return FALSE;
4785
4786 new_flags = elf_elfheader (ibfd)->e_flags;
4787 old_flags = elf_elfheader (obfd)->e_flags;
4788 if (!elf_flags_init (obfd))
4789 {
4790 /* First call, no flags set. */
4791 elf_flags_init (obfd) = TRUE;
4792 elf_elfheader (obfd)->e_flags = new_flags;
4793 }
4794
4795 /* Compatible flags are ok. */
4796 else if (new_flags == old_flags)
4797 ;
4798
4799 /* Incompatible flags. */
4800 else
4801 {
4802 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4803 to be linked with either. */
4804 error = FALSE;
4805 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4806 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4807 {
4808 error = TRUE;
4809 _bfd_error_handler
4810 (_("%B: compiled with -mrelocatable and linked with "
4811 "modules compiled normally"), ibfd);
4812 }
4813 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4814 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4815 {
4816 error = TRUE;
4817 _bfd_error_handler
4818 (_("%B: compiled normally and linked with "
4819 "modules compiled with -mrelocatable"), ibfd);
4820 }
4821
4822 /* The output is -mrelocatable-lib iff both the input files are. */
4823 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4824 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4825
4826 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4827 but each input file is either -mrelocatable or -mrelocatable-lib. */
4828 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4829 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4830 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4831 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4832
4833 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4834 any module uses it. */
4835 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4836
4837 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4838 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4839
4840 /* Warn about any other mismatches. */
4841 if (new_flags != old_flags)
4842 {
4843 error = TRUE;
4844 _bfd_error_handler
4845 /* xgettext:c-format */
4846 (_("%B: uses different e_flags (%#x) fields "
4847 "than previous modules (%#x)"),
4848 ibfd, new_flags, old_flags);
4849 }
4850
4851 if (error)
4852 {
4853 bfd_set_error (bfd_error_bad_value);
4854 return FALSE;
4855 }
4856 }
4857
4858 return TRUE;
4859 }
4860
4861 static void
4862 ppc_elf_vle_split16 (bfd *input_bfd,
4863 asection *input_section,
4864 unsigned long offset,
4865 bfd_byte *loc,
4866 bfd_vma value,
4867 split16_format_type split16_format,
4868 bfd_boolean fixup)
4869 {
4870 unsigned int insn, opcode, top5;
4871
4872 insn = bfd_get_32 (input_bfd, loc);
4873 opcode = insn & 0xfc00f800;
4874 if (opcode == E_OR2I_INSN
4875 || opcode == E_AND2I_DOT_INSN
4876 || opcode == E_OR2IS_INSN
4877 || opcode == E_LIS_INSN
4878 || opcode == E_AND2IS_DOT_INSN)
4879 {
4880 if (split16_format != split16a_type)
4881 {
4882 if (fixup)
4883 split16_format = split16a_type;
4884 else
4885 _bfd_error_handler
4886 /* xgettext:c-format */
4887 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4888 input_bfd, input_section, offset, opcode);
4889 }
4890 }
4891 else if (opcode == E_ADD2I_DOT_INSN
4892 || opcode == E_ADD2IS_INSN
4893 || opcode == E_CMP16I_INSN
4894 || opcode == E_MULL2I_INSN
4895 || opcode == E_CMPL16I_INSN
4896 || opcode == E_CMPH16I_INSN
4897 || opcode == E_CMPHL16I_INSN)
4898 {
4899 if (split16_format != split16d_type)
4900 {
4901 if (fixup)
4902 split16_format = split16d_type;
4903 else
4904 _bfd_error_handler
4905 /* xgettext:c-format */
4906 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4907 input_bfd, input_section, offset, opcode);
4908 }
4909 }
4910 top5 = value & 0xf800;
4911 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4912 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4913 insn |= top5;
4914 insn |= value & 0x7ff;
4915 bfd_put_32 (input_bfd, insn, loc);
4916 }
4917
4918 static void
4919 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4920 {
4921 unsigned int insn;
4922
4923 insn = bfd_get_32 (output_bfd, loc);
4924 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4925 /* Top 4 bits of value to 17..20. */
4926 insn |= (value & 0xf0000) >> 5;
4927 /* Next 5 bits of the value to 11..15. */
4928 insn |= (value & 0xf800) << 5;
4929 /* And the final 11 bits of the value to bits 21 to 31. */
4930 insn |= value & 0x7ff;
4931 bfd_put_32 (output_bfd, insn, loc);
4932 }
4933
4934 \f
4935 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4936 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4937 int
4938 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4939 struct bfd_link_info *info)
4940 {
4941 struct ppc_elf_link_hash_table *htab;
4942 flagword flags;
4943
4944 htab = ppc_elf_hash_table (info);
4945
4946 if (htab->plt_type == PLT_UNSET)
4947 {
4948 struct elf_link_hash_entry *h;
4949
4950 if (htab->params->plt_style == PLT_OLD)
4951 htab->plt_type = PLT_OLD;
4952 else if (bfd_link_pic (info)
4953 && htab->elf.dynamic_sections_created
4954 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4955 FALSE, FALSE, TRUE)) != NULL
4956 && (h->type == STT_FUNC
4957 || h->needs_plt)
4958 && h->ref_regular
4959 && !(SYMBOL_CALLS_LOCAL (info, h)
4960 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4961 {
4962 /* Profiling of shared libs (and pies) is not supported with
4963 secure plt, because ppc32 does profiling before a
4964 function prologue and a secure plt pic call stubs needs
4965 r30 to be set up. */
4966 htab->plt_type = PLT_OLD;
4967 }
4968 else
4969 {
4970 bfd *ibfd;
4971 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4972
4973 /* Look through the reloc flags left by ppc_elf_check_relocs.
4974 Use the old style bss plt if a file makes plt calls
4975 without using the new relocs, and if ld isn't given
4976 --secure-plt and we never see REL16 relocs. */
4977 if (plt_type == PLT_UNSET)
4978 plt_type = PLT_OLD;
4979 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4980 if (is_ppc_elf (ibfd))
4981 {
4982 if (ppc_elf_tdata (ibfd)->has_rel16)
4983 plt_type = PLT_NEW;
4984 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4985 {
4986 plt_type = PLT_OLD;
4987 htab->old_bfd = ibfd;
4988 break;
4989 }
4990 }
4991 htab->plt_type = plt_type;
4992 }
4993 }
4994 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4995 {
4996 if (htab->old_bfd != NULL)
4997 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4998 htab->old_bfd);
4999 else
5000 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5001 }
5002
5003 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5004
5005 if (htab->plt_type == PLT_NEW)
5006 {
5007 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5008 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5009
5010 /* The new PLT is a loaded section. */
5011 if (htab->elf.splt != NULL
5012 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5013 return -1;
5014
5015 /* The new GOT is not executable. */
5016 if (htab->elf.sgot != NULL
5017 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5018 return -1;
5019 }
5020 else
5021 {
5022 /* Stop an unused .glink section from affecting .text alignment. */
5023 if (htab->glink != NULL
5024 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5025 return -1;
5026 }
5027 return htab->plt_type == PLT_NEW;
5028 }
5029 \f
5030 /* Return the section that should be marked against GC for a given
5031 relocation. */
5032
5033 static asection *
5034 ppc_elf_gc_mark_hook (asection *sec,
5035 struct bfd_link_info *info,
5036 Elf_Internal_Rela *rel,
5037 struct elf_link_hash_entry *h,
5038 Elf_Internal_Sym *sym)
5039 {
5040 if (h != NULL)
5041 switch (ELF32_R_TYPE (rel->r_info))
5042 {
5043 case R_PPC_GNU_VTINHERIT:
5044 case R_PPC_GNU_VTENTRY:
5045 return NULL;
5046 }
5047
5048 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5049 }
5050 \f
5051 /* Set plt output section type, htab->tls_get_addr, and call the
5052 generic ELF tls_setup function. */
5053
5054 asection *
5055 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5056 {
5057 struct ppc_elf_link_hash_table *htab;
5058
5059 htab = ppc_elf_hash_table (info);
5060 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5061 FALSE, FALSE, TRUE);
5062 if (htab->plt_type != PLT_NEW)
5063 htab->params->no_tls_get_addr_opt = TRUE;
5064
5065 if (!htab->params->no_tls_get_addr_opt)
5066 {
5067 struct elf_link_hash_entry *opt, *tga;
5068 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5069 FALSE, FALSE, TRUE);
5070 if (opt != NULL
5071 && (opt->root.type == bfd_link_hash_defined
5072 || opt->root.type == bfd_link_hash_defweak))
5073 {
5074 /* If glibc supports an optimized __tls_get_addr call stub,
5075 signalled by the presence of __tls_get_addr_opt, and we'll
5076 be calling __tls_get_addr via a plt call stub, then
5077 make __tls_get_addr point to __tls_get_addr_opt. */
5078 tga = htab->tls_get_addr;
5079 if (htab->elf.dynamic_sections_created
5080 && tga != NULL
5081 && (tga->type == STT_FUNC
5082 || tga->needs_plt)
5083 && !(SYMBOL_CALLS_LOCAL (info, tga)
5084 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5085 {
5086 struct plt_entry *ent;
5087 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5088 if (ent->plt.refcount > 0)
5089 break;
5090 if (ent != NULL)
5091 {
5092 tga->root.type = bfd_link_hash_indirect;
5093 tga->root.u.i.link = &opt->root;
5094 ppc_elf_copy_indirect_symbol (info, opt, tga);
5095 opt->mark = 1;
5096 if (opt->dynindx != -1)
5097 {
5098 /* Use __tls_get_addr_opt in dynamic relocations. */
5099 opt->dynindx = -1;
5100 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5101 opt->dynstr_index);
5102 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5103 return FALSE;
5104 }
5105 htab->tls_get_addr = opt;
5106 }
5107 }
5108 }
5109 else
5110 htab->params->no_tls_get_addr_opt = TRUE;
5111 }
5112 if (htab->plt_type == PLT_NEW
5113 && htab->elf.splt != NULL
5114 && htab->elf.splt->output_section != NULL)
5115 {
5116 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5117 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5118 }
5119
5120 return _bfd_elf_tls_setup (obfd, info);
5121 }
5122
5123 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5124 HASH. */
5125
5126 static bfd_boolean
5127 branch_reloc_hash_match (const bfd *ibfd,
5128 const Elf_Internal_Rela *rel,
5129 const struct elf_link_hash_entry *hash)
5130 {
5131 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5132 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5133 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5134
5135 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5136 {
5137 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5138 struct elf_link_hash_entry *h;
5139
5140 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5141 while (h->root.type == bfd_link_hash_indirect
5142 || h->root.type == bfd_link_hash_warning)
5143 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5144 if (h == hash)
5145 return TRUE;
5146 }
5147 return FALSE;
5148 }
5149
5150 /* Run through all the TLS relocs looking for optimization
5151 opportunities. */
5152
5153 bfd_boolean
5154 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5155 struct bfd_link_info *info)
5156 {
5157 bfd *ibfd;
5158 asection *sec;
5159 struct ppc_elf_link_hash_table *htab;
5160 int pass;
5161
5162 if (!bfd_link_executable (info))
5163 return TRUE;
5164
5165 htab = ppc_elf_hash_table (info);
5166 if (htab == NULL)
5167 return FALSE;
5168
5169 /* Make two passes through the relocs. First time check that tls
5170 relocs involved in setting up a tls_get_addr call are indeed
5171 followed by such a call. If they are not, don't do any tls
5172 optimization. On the second pass twiddle tls_mask flags to
5173 notify relocate_section that optimization can be done, and
5174 adjust got and plt refcounts. */
5175 for (pass = 0; pass < 2; ++pass)
5176 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5177 {
5178 Elf_Internal_Sym *locsyms = NULL;
5179 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5180 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5181
5182 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5183 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5184 {
5185 Elf_Internal_Rela *relstart, *rel, *relend;
5186 int expecting_tls_get_addr = 0;
5187
5188 /* Read the relocations. */
5189 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5190 info->keep_memory);
5191 if (relstart == NULL)
5192 return FALSE;
5193
5194 relend = relstart + sec->reloc_count;
5195 for (rel = relstart; rel < relend; rel++)
5196 {
5197 enum elf_ppc_reloc_type r_type;
5198 unsigned long r_symndx;
5199 struct elf_link_hash_entry *h = NULL;
5200 char *tls_mask;
5201 char tls_set, tls_clear;
5202 bfd_boolean is_local;
5203 bfd_signed_vma *got_count;
5204
5205 r_symndx = ELF32_R_SYM (rel->r_info);
5206 if (r_symndx >= symtab_hdr->sh_info)
5207 {
5208 struct elf_link_hash_entry **sym_hashes;
5209
5210 sym_hashes = elf_sym_hashes (ibfd);
5211 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5212 while (h->root.type == bfd_link_hash_indirect
5213 || h->root.type == bfd_link_hash_warning)
5214 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5215 }
5216
5217 is_local = FALSE;
5218 if (h == NULL
5219 || !h->def_dynamic)
5220 is_local = TRUE;
5221
5222 r_type = ELF32_R_TYPE (rel->r_info);
5223 /* If this section has old-style __tls_get_addr calls
5224 without marker relocs, then check that each
5225 __tls_get_addr call reloc is preceded by a reloc
5226 that conceivably belongs to the __tls_get_addr arg
5227 setup insn. If we don't find matching arg setup
5228 relocs, don't do any tls optimization. */
5229 if (pass == 0
5230 && sec->has_tls_get_addr_call
5231 && h != NULL
5232 && h == htab->tls_get_addr
5233 && !expecting_tls_get_addr
5234 && is_branch_reloc (r_type))
5235 {
5236 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5237 "TLS optimization disabled\n",
5238 ibfd, sec, rel->r_offset);
5239 if (elf_section_data (sec)->relocs != relstart)
5240 free (relstart);
5241 return TRUE;
5242 }
5243
5244 expecting_tls_get_addr = 0;
5245 switch (r_type)
5246 {
5247 case R_PPC_GOT_TLSLD16:
5248 case R_PPC_GOT_TLSLD16_LO:
5249 expecting_tls_get_addr = 1;
5250 /* Fall through. */
5251
5252 case R_PPC_GOT_TLSLD16_HI:
5253 case R_PPC_GOT_TLSLD16_HA:
5254 /* These relocs should never be against a symbol
5255 defined in a shared lib. Leave them alone if
5256 that turns out to be the case. */
5257 if (!is_local)
5258 continue;
5259
5260 /* LD -> LE */
5261 tls_set = 0;
5262 tls_clear = TLS_LD;
5263 break;
5264
5265 case R_PPC_GOT_TLSGD16:
5266 case R_PPC_GOT_TLSGD16_LO:
5267 expecting_tls_get_addr = 1;
5268 /* Fall through. */
5269
5270 case R_PPC_GOT_TLSGD16_HI:
5271 case R_PPC_GOT_TLSGD16_HA:
5272 if (is_local)
5273 /* GD -> LE */
5274 tls_set = 0;
5275 else
5276 /* GD -> IE */
5277 tls_set = TLS_TLS | TLS_TPRELGD;
5278 tls_clear = TLS_GD;
5279 break;
5280
5281 case R_PPC_GOT_TPREL16:
5282 case R_PPC_GOT_TPREL16_LO:
5283 case R_PPC_GOT_TPREL16_HI:
5284 case R_PPC_GOT_TPREL16_HA:
5285 if (is_local)
5286 {
5287 /* IE -> LE */
5288 tls_set = 0;
5289 tls_clear = TLS_TPREL;
5290 break;
5291 }
5292 else
5293 continue;
5294
5295 case R_PPC_TLSGD:
5296 case R_PPC_TLSLD:
5297 expecting_tls_get_addr = 2;
5298 tls_set = 0;
5299 tls_clear = 0;
5300 break;
5301
5302 default:
5303 continue;
5304 }
5305
5306 if (pass == 0)
5307 {
5308 if (!expecting_tls_get_addr
5309 || (expecting_tls_get_addr == 1
5310 && !sec->has_tls_get_addr_call))
5311 continue;
5312
5313 if (rel + 1 < relend
5314 && branch_reloc_hash_match (ibfd, rel + 1,
5315 htab->tls_get_addr))
5316 continue;
5317
5318 /* Uh oh, we didn't find the expected call. We
5319 could just mark this symbol to exclude it
5320 from tls optimization but it's safer to skip
5321 the entire optimization. */
5322 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5323 "TLS optimization disabled\n"),
5324 ibfd, sec, rel->r_offset);
5325 if (elf_section_data (sec)->relocs != relstart)
5326 free (relstart);
5327 return TRUE;
5328 }
5329
5330 if (expecting_tls_get_addr)
5331 {
5332 struct plt_entry *ent;
5333 bfd_vma addend = 0;
5334
5335 if (bfd_link_pic (info)
5336 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5337 addend = rel[1].r_addend;
5338 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5339 got2, addend);
5340 if (ent != NULL && ent->plt.refcount > 0)
5341 ent->plt.refcount -= 1;
5342
5343 if (expecting_tls_get_addr == 2)
5344 continue;
5345 }
5346
5347 if (h != NULL)
5348 {
5349 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5350 got_count = &h->got.refcount;
5351 }
5352 else
5353 {
5354 bfd_signed_vma *lgot_refs;
5355 struct plt_entry **local_plt;
5356 char *lgot_masks;
5357
5358 if (locsyms == NULL)
5359 {
5360 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5361 if (locsyms == NULL)
5362 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5363 symtab_hdr->sh_info,
5364 0, NULL, NULL, NULL);
5365 if (locsyms == NULL)
5366 {
5367 if (elf_section_data (sec)->relocs != relstart)
5368 free (relstart);
5369 return FALSE;
5370 }
5371 }
5372 lgot_refs = elf_local_got_refcounts (ibfd);
5373 if (lgot_refs == NULL)
5374 abort ();
5375 local_plt = (struct plt_entry **)
5376 (lgot_refs + symtab_hdr->sh_info);
5377 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5378 tls_mask = &lgot_masks[r_symndx];
5379 got_count = &lgot_refs[r_symndx];
5380 }
5381
5382 if (tls_set == 0)
5383 {
5384 /* We managed to get rid of a got entry. */
5385 if (*got_count > 0)
5386 *got_count -= 1;
5387 }
5388
5389 *tls_mask |= tls_set;
5390 *tls_mask &= ~tls_clear;
5391 }
5392
5393 if (elf_section_data (sec)->relocs != relstart)
5394 free (relstart);
5395 }
5396
5397 if (locsyms != NULL
5398 && (symtab_hdr->contents != (unsigned char *) locsyms))
5399 {
5400 if (!info->keep_memory)
5401 free (locsyms);
5402 else
5403 symtab_hdr->contents = (unsigned char *) locsyms;
5404 }
5405 }
5406 htab->do_tls_opt = 1;
5407 return TRUE;
5408 }
5409 \f
5410 /* Find dynamic relocs for H that apply to read-only sections. */
5411
5412 static asection *
5413 readonly_dynrelocs (struct elf_link_hash_entry *h)
5414 {
5415 struct elf_dyn_relocs *p;
5416
5417 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5418 {
5419 asection *s = p->sec->output_section;
5420
5421 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5422 return p->sec;
5423 }
5424 return NULL;
5425 }
5426
5427 /* Return true if we have dynamic relocs against H or any of its weak
5428 aliases, that apply to read-only sections. Cannot be used after
5429 size_dynamic_sections. */
5430
5431 static bfd_boolean
5432 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5433 {
5434 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5435 do
5436 {
5437 if (readonly_dynrelocs (&eh->elf))
5438 return TRUE;
5439 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5440 } while (eh != NULL && &eh->elf != h);
5441
5442 return FALSE;
5443 }
5444
5445 /* Return whether H has pc-relative dynamic relocs. */
5446
5447 static bfd_boolean
5448 pc_dynrelocs (struct elf_link_hash_entry *h)
5449 {
5450 struct elf_dyn_relocs *p;
5451
5452 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5453 if (p->pc_count != 0)
5454 return TRUE;
5455 return FALSE;
5456 }
5457
5458 /* Adjust a symbol defined by a dynamic object and referenced by a
5459 regular object. The current definition is in some section of the
5460 dynamic object, but we're not including those sections. We have to
5461 change the definition to something the rest of the link can
5462 understand. */
5463
5464 static bfd_boolean
5465 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5466 struct elf_link_hash_entry *h)
5467 {
5468 struct ppc_elf_link_hash_table *htab;
5469 asection *s;
5470
5471 #ifdef DEBUG
5472 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5473 h->root.root.string);
5474 #endif
5475
5476 /* Make sure we know what is going on here. */
5477 htab = ppc_elf_hash_table (info);
5478 BFD_ASSERT (htab->elf.dynobj != NULL
5479 && (h->needs_plt
5480 || h->type == STT_GNU_IFUNC
5481 || h->is_weakalias
5482 || (h->def_dynamic
5483 && h->ref_regular
5484 && !h->def_regular)));
5485
5486 /* Deal with function syms. */
5487 if (h->type == STT_FUNC
5488 || h->type == STT_GNU_IFUNC
5489 || h->needs_plt)
5490 {
5491 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5492 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5493 /* Discard dyn_relocs when non-pic if we've decided that a
5494 function symbol is local. */
5495 if (!bfd_link_pic (info) && local)
5496 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5497
5498 /* Clear procedure linkage table information for any symbol that
5499 won't need a .plt entry. */
5500 struct plt_entry *ent;
5501 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5502 if (ent->plt.refcount > 0)
5503 break;
5504 if (ent == NULL
5505 || (h->type != STT_GNU_IFUNC && local))
5506 {
5507 /* A PLT entry is not required/allowed when:
5508
5509 1. We are not using ld.so; because then the PLT entry
5510 can't be set up, so we can't use one. In this case,
5511 ppc_elf_adjust_dynamic_symbol won't even be called.
5512
5513 2. GC has rendered the entry unused.
5514
5515 3. We know for certain that a call to this symbol
5516 will go to this object, or will remain undefined. */
5517 h->plt.plist = NULL;
5518 h->needs_plt = 0;
5519 h->pointer_equality_needed = 0;
5520 }
5521 else
5522 {
5523 /* Taking a function's address in a read/write section
5524 doesn't require us to define the function symbol in the
5525 executable on a plt call stub. A dynamic reloc can
5526 be used instead, giving better runtime performance.
5527 (Calls via that function pointer don't need to bounce
5528 through the plt call stub.) Similarly, use a dynamic
5529 reloc for a weak reference when possible, allowing the
5530 resolution of the symbol to be set at load time rather
5531 than link time. */
5532 if ((h->pointer_equality_needed
5533 || (h->non_got_ref
5534 && !h->ref_regular_nonweak
5535 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5536 && !htab->is_vxworks
5537 && !ppc_elf_hash_entry (h)->has_sda_refs
5538 && !readonly_dynrelocs (h))
5539 {
5540 h->pointer_equality_needed = 0;
5541 /* If we haven't seen a branch reloc then we don't need
5542 a plt entry. */
5543 if (!h->needs_plt)
5544 h->plt.plist = NULL;
5545 }
5546 else if (!bfd_link_pic (info))
5547 /* We are going to be defining the function symbol on the
5548 plt stub, so no dyn_relocs needed when non-pic. */
5549 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5550 }
5551 h->protected_def = 0;
5552 /* Function symbols can't have copy relocs. */
5553 return TRUE;
5554 }
5555 else
5556 h->plt.plist = NULL;
5557
5558 /* If this is a weak symbol, and there is a real definition, the
5559 processor independent code will have arranged for us to see the
5560 real definition first, and we can just use the same value. */
5561 if (h->is_weakalias)
5562 {
5563 struct elf_link_hash_entry *def = weakdef (h);
5564 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5565 h->root.u.def.section = def->root.u.def.section;
5566 h->root.u.def.value = def->root.u.def.value;
5567 if (def->root.u.def.section == htab->elf.sdynbss
5568 || def->root.u.def.section == htab->elf.sdynrelro
5569 || def->root.u.def.section == htab->dynsbss)
5570 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5571 return TRUE;
5572 }
5573
5574 /* This is a reference to a symbol defined by a dynamic object which
5575 is not a function. */
5576
5577 /* If we are creating a shared library, we must presume that the
5578 only references to the symbol are via the global offset table.
5579 For such cases we need not do anything here; the relocations will
5580 be handled correctly by relocate_section. */
5581 if (bfd_link_pic (info))
5582 {
5583 h->protected_def = 0;
5584 return TRUE;
5585 }
5586
5587 /* If there are no references to this symbol that do not use the
5588 GOT, we don't need to generate a copy reloc. */
5589 if (!h->non_got_ref)
5590 {
5591 h->protected_def = 0;
5592 return TRUE;
5593 }
5594
5595 /* Protected variables do not work with .dynbss. The copy in
5596 .dynbss won't be used by the shared library with the protected
5597 definition for the variable. Editing to PIC, or text relocations
5598 are preferable to an incorrect program. */
5599 if (h->protected_def)
5600 {
5601 if (ELIMINATE_COPY_RELOCS
5602 && ppc_elf_hash_entry (h)->has_addr16_ha
5603 && ppc_elf_hash_entry (h)->has_addr16_lo
5604 && htab->params->pic_fixup == 0
5605 && info->disable_target_specific_optimizations <= 1)
5606 htab->params->pic_fixup = 1;
5607 return TRUE;
5608 }
5609
5610 /* If -z nocopyreloc was given, we won't generate them either. */
5611 if (info->nocopyreloc)
5612 return TRUE;
5613
5614 /* If we don't find any dynamic relocs in read-only sections, then
5615 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5616 We can't do this if there are any small data relocations. This
5617 doesn't work on VxWorks, where we can not have dynamic
5618 relocations (other than copy and jump slot relocations) in an
5619 executable. */
5620 if (ELIMINATE_COPY_RELOCS
5621 && !ppc_elf_hash_entry (h)->has_sda_refs
5622 && !htab->is_vxworks
5623 && !h->def_regular
5624 && !alias_readonly_dynrelocs (h))
5625 return TRUE;
5626
5627 /* We must allocate the symbol in our .dynbss section, which will
5628 become part of the .bss section of the executable. There will be
5629 an entry for this symbol in the .dynsym section. The dynamic
5630 object will contain position independent code, so all references
5631 from the dynamic object to this symbol will go through the global
5632 offset table. The dynamic linker will use the .dynsym entry to
5633 determine the address it must put in the global offset table, so
5634 both the dynamic object and the regular object will refer to the
5635 same memory location for the variable.
5636
5637 Of course, if the symbol is referenced using SDAREL relocs, we
5638 must instead allocate it in .sbss. */
5639 if (ppc_elf_hash_entry (h)->has_sda_refs)
5640 s = htab->dynsbss;
5641 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5642 s = htab->elf.sdynrelro;
5643 else
5644 s = htab->elf.sdynbss;
5645 BFD_ASSERT (s != NULL);
5646
5647 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5648 {
5649 asection *srel;
5650
5651 /* We must generate a R_PPC_COPY reloc to tell the dynamic
5652 linker to copy the initial value out of the dynamic object
5653 and into the runtime process image. */
5654 if (ppc_elf_hash_entry (h)->has_sda_refs)
5655 srel = htab->relsbss;
5656 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5657 srel = htab->elf.sreldynrelro;
5658 else
5659 srel = htab->elf.srelbss;
5660 BFD_ASSERT (srel != NULL);
5661 srel->size += sizeof (Elf32_External_Rela);
5662 h->needs_copy = 1;
5663 }
5664
5665 /* We no longer want dyn_relocs. */
5666 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5667 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5668 }
5669 \f
5670 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5671 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5672 specifying the addend on the plt relocation. For -fpic code, the sym
5673 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5674 xxxxxxxx.got2.plt_pic32.<callee>. */
5675
5676 static bfd_boolean
5677 add_stub_sym (struct plt_entry *ent,
5678 struct elf_link_hash_entry *h,
5679 struct bfd_link_info *info)
5680 {
5681 struct elf_link_hash_entry *sh;
5682 size_t len1, len2, len3;
5683 char *name;
5684 const char *stub;
5685 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5686
5687 if (bfd_link_pic (info))
5688 stub = ".plt_pic32.";
5689 else
5690 stub = ".plt_call32.";
5691
5692 len1 = strlen (h->root.root.string);
5693 len2 = strlen (stub);
5694 len3 = 0;
5695 if (ent->sec)
5696 len3 = strlen (ent->sec->name);
5697 name = bfd_malloc (len1 + len2 + len3 + 9);
5698 if (name == NULL)
5699 return FALSE;
5700 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5701 if (ent->sec)
5702 memcpy (name + 8, ent->sec->name, len3);
5703 memcpy (name + 8 + len3, stub, len2);
5704 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5705 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5706 if (sh == NULL)
5707 return FALSE;
5708 if (sh->root.type == bfd_link_hash_new)
5709 {
5710 sh->root.type = bfd_link_hash_defined;
5711 sh->root.u.def.section = htab->glink;
5712 sh->root.u.def.value = ent->glink_offset;
5713 sh->ref_regular = 1;
5714 sh->def_regular = 1;
5715 sh->ref_regular_nonweak = 1;
5716 sh->forced_local = 1;
5717 sh->non_elf = 0;
5718 sh->root.linker_def = 1;
5719 }
5720 return TRUE;
5721 }
5722
5723 /* Allocate NEED contiguous space in .got, and return the offset.
5724 Handles allocation of the got header when crossing 32k. */
5725
5726 static bfd_vma
5727 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5728 {
5729 bfd_vma where;
5730 unsigned int max_before_header;
5731
5732 if (htab->plt_type == PLT_VXWORKS)
5733 {
5734 where = htab->elf.sgot->size;
5735 htab->elf.sgot->size += need;
5736 }
5737 else
5738 {
5739 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5740 if (need <= htab->got_gap)
5741 {
5742 where = max_before_header - htab->got_gap;
5743 htab->got_gap -= need;
5744 }
5745 else
5746 {
5747 if (htab->elf.sgot->size + need > max_before_header
5748 && htab->elf.sgot->size <= max_before_header)
5749 {
5750 htab->got_gap = max_before_header - htab->elf.sgot->size;
5751 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5752 }
5753 where = htab->elf.sgot->size;
5754 htab->elf.sgot->size += need;
5755 }
5756 }
5757 return where;
5758 }
5759
5760 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5761 TLS_LD is excluded because those go in a special GOT slot. */
5762
5763 static inline unsigned int
5764 got_entries_needed (int tls_mask)
5765 {
5766 unsigned int need;
5767 if ((tls_mask & TLS_TLS) == 0)
5768 need = 4;
5769 else
5770 {
5771 need = 0;
5772 if ((tls_mask & TLS_GD) != 0)
5773 need += 8;
5774 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5775 need += 4;
5776 if ((tls_mask & TLS_DTPREL) != 0)
5777 need += 4;
5778 }
5779 return need;
5780 }
5781
5782 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5783 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5784 link time. */
5785
5786 static inline unsigned int
5787 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5788 {
5789 /* All the entries we allocated need relocs.
5790 Except IE in executable with a local symbol. We could also omit
5791 the DTPREL reloc on the second word of a GD entry under the same
5792 condition as that for IE, but ld.so needs to differentiate
5793 LD and GD entries. */
5794 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0 && known)
5795 need -= 4;
5796 return need * sizeof (Elf32_External_Rela) / 4;
5797 }
5798
5799 /* If H is undefined, make it dynamic if that makes sense. */
5800
5801 static bfd_boolean
5802 ensure_undef_dynamic (struct bfd_link_info *info,
5803 struct elf_link_hash_entry *h)
5804 {
5805 struct elf_link_hash_table *htab = elf_hash_table (info);
5806
5807 if (htab->dynamic_sections_created
5808 && ((info->dynamic_undefined_weak != 0
5809 && h->root.type == bfd_link_hash_undefweak)
5810 || h->root.type == bfd_link_hash_undefined)
5811 && h->dynindx == -1
5812 && !h->forced_local
5813 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5814 return bfd_elf_link_record_dynamic_symbol (info, h);
5815 return TRUE;
5816 }
5817
5818 /* Allocate space in associated reloc sections for dynamic relocs. */
5819
5820 static bfd_boolean
5821 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5822 {
5823 struct bfd_link_info *info = inf;
5824 struct ppc_elf_link_hash_entry *eh;
5825 struct ppc_elf_link_hash_table *htab;
5826 struct elf_dyn_relocs *p;
5827 bfd_boolean dyn;
5828
5829 if (h->root.type == bfd_link_hash_indirect)
5830 return TRUE;
5831
5832 htab = ppc_elf_hash_table (info);
5833 eh = (struct ppc_elf_link_hash_entry *) h;
5834 if (eh->elf.got.refcount > 0
5835 || (ELIMINATE_COPY_RELOCS
5836 && !eh->elf.def_regular
5837 && eh->elf.protected_def
5838 && eh->has_addr16_ha
5839 && eh->has_addr16_lo
5840 && htab->params->pic_fixup > 0))
5841 {
5842 unsigned int need;
5843
5844 /* Make sure this symbol is output as a dynamic symbol. */
5845 if (!ensure_undef_dynamic (info, &eh->elf))
5846 return FALSE;
5847
5848 need = 0;
5849 if ((eh->tls_mask & TLS_LD) != 0)
5850 {
5851 if (!eh->elf.def_dynamic)
5852 /* We'll just use htab->tlsld_got.offset. This should
5853 always be the case. It's a little odd if we have
5854 a local dynamic reloc against a non-local symbol. */
5855 htab->tlsld_got.refcount += 1;
5856 else
5857 need += 8;
5858 }
5859 need += got_entries_needed (eh->tls_mask);
5860 if (need == 0)
5861 eh->elf.got.offset = (bfd_vma) -1;
5862 else
5863 {
5864 eh->elf.got.offset = allocate_got (htab, need);
5865 if ((bfd_link_pic (info)
5866 || (htab->elf.dynamic_sections_created
5867 && eh->elf.dynindx != -1
5868 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5869 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5870 {
5871 asection *rsec;
5872 bfd_boolean tprel_known = (bfd_link_executable (info)
5873 && SYMBOL_REFERENCES_LOCAL (info,
5874 &eh->elf));
5875
5876 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5877 if ((eh->tls_mask & TLS_LD) != 0 && eh->elf.def_dynamic)
5878 need -= sizeof (Elf32_External_Rela);
5879 rsec = htab->elf.srelgot;
5880 if (eh->elf.type == STT_GNU_IFUNC)
5881 rsec = htab->elf.irelplt;
5882 rsec->size += need;
5883 }
5884 }
5885 }
5886 else
5887 eh->elf.got.offset = (bfd_vma) -1;
5888
5889 /* If no dynamic sections we can't have dynamic relocs, except for
5890 IFUNCs which are handled even in static executables. */
5891 if (!htab->elf.dynamic_sections_created
5892 && h->type != STT_GNU_IFUNC)
5893 eh->dyn_relocs = NULL;
5894
5895 /* Discard relocs on undefined symbols that must be local. */
5896 else if (h->root.type == bfd_link_hash_undefined
5897 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5898 eh->dyn_relocs = NULL;
5899
5900 /* Also discard relocs on undefined weak syms with non-default
5901 visibility, or when dynamic_undefined_weak says so. */
5902 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5903 eh->dyn_relocs = NULL;
5904
5905 if (eh->dyn_relocs == NULL)
5906 ;
5907
5908 /* In the shared -Bsymbolic case, discard space allocated for
5909 dynamic pc-relative relocs against symbols which turn out to be
5910 defined in regular objects. For the normal shared case, discard
5911 space for relocs that have become local due to symbol visibility
5912 changes. */
5913 else if (bfd_link_pic (info))
5914 {
5915 /* Relocs that use pc_count are those that appear on a call insn,
5916 or certain REL relocs (see must_be_dyn_reloc) that can be
5917 generated via assembly. We want calls to protected symbols to
5918 resolve directly to the function rather than going via the plt.
5919 If people want function pointer comparisons to work as expected
5920 then they should avoid writing weird assembly. */
5921 if (SYMBOL_CALLS_LOCAL (info, h))
5922 {
5923 struct elf_dyn_relocs **pp;
5924
5925 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5926 {
5927 p->count -= p->pc_count;
5928 p->pc_count = 0;
5929 if (p->count == 0)
5930 *pp = p->next;
5931 else
5932 pp = &p->next;
5933 }
5934 }
5935
5936 if (htab->is_vxworks)
5937 {
5938 struct elf_dyn_relocs **pp;
5939
5940 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5941 {
5942 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5943 *pp = p->next;
5944 else
5945 pp = &p->next;
5946 }
5947 }
5948
5949 if (eh->dyn_relocs != NULL)
5950 {
5951 /* Make sure this symbol is output as a dynamic symbol. */
5952 if (!ensure_undef_dynamic (info, h))
5953 return FALSE;
5954 }
5955 }
5956 else if (ELIMINATE_COPY_RELOCS)
5957 {
5958 /* For the non-pic case, discard space for relocs against
5959 symbols which turn out to need copy relocs or are not
5960 dynamic. */
5961 if (h->dynamic_adjusted
5962 && !h->def_regular
5963 && !ELF_COMMON_DEF_P (h)
5964 && !(h->protected_def
5965 && eh->has_addr16_ha
5966 && eh->has_addr16_lo
5967 && htab->params->pic_fixup > 0))
5968 {
5969 /* Make sure this symbol is output as a dynamic symbol. */
5970 if (!ensure_undef_dynamic (info, h))
5971 return FALSE;
5972
5973 if (h->dynindx == -1)
5974 eh->dyn_relocs = NULL;
5975 }
5976 else
5977 eh->dyn_relocs = NULL;
5978 }
5979
5980 /* Allocate space. */
5981 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5982 {
5983 asection *sreloc = elf_section_data (p->sec)->sreloc;
5984 if (eh->elf.type == STT_GNU_IFUNC)
5985 sreloc = htab->elf.irelplt;
5986 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5987 }
5988
5989 /* Handle PLT relocs. Done last, after dynindx has settled. */
5990 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
5991 if (dyn || h->type == STT_GNU_IFUNC)
5992 {
5993 struct plt_entry *ent;
5994 bfd_boolean doneone = FALSE;
5995 bfd_vma plt_offset = 0, glink_offset = 0;
5996
5997 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5998 if (ent->plt.refcount > 0)
5999 {
6000 asection *s = htab->elf.splt;
6001
6002 if (!dyn)
6003 s = htab->elf.iplt;
6004
6005 if (htab->plt_type == PLT_NEW || !dyn)
6006 {
6007 if (!doneone)
6008 {
6009 plt_offset = s->size;
6010 s->size += 4;
6011 }
6012 ent->plt.offset = plt_offset;
6013
6014 s = htab->glink;
6015 if (!doneone || bfd_link_pic (info))
6016 {
6017 glink_offset = s->size;
6018 s->size += GLINK_ENTRY_SIZE;
6019 if (h == htab->tls_get_addr
6020 && !htab->params->no_tls_get_addr_opt)
6021 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6022 }
6023 if (!doneone
6024 && !bfd_link_pic (info)
6025 && h->def_dynamic
6026 && !h->def_regular)
6027 {
6028 h->root.u.def.section = s;
6029 h->root.u.def.value = glink_offset;
6030 }
6031 ent->glink_offset = glink_offset;
6032
6033 if (htab->params->emit_stub_syms
6034 && !add_stub_sym (ent, h, info))
6035 return FALSE;
6036 }
6037 else
6038 {
6039 if (!doneone)
6040 {
6041 /* If this is the first .plt entry, make room
6042 for the special first entry. */
6043 if (s->size == 0)
6044 s->size += htab->plt_initial_entry_size;
6045
6046 /* The PowerPC PLT is actually composed of two
6047 parts, the first part is 2 words (for a load
6048 and a jump), and then there is a remaining
6049 word available at the end. */
6050 plt_offset = (htab->plt_initial_entry_size
6051 + (htab->plt_slot_size
6052 * ((s->size
6053 - htab->plt_initial_entry_size)
6054 / htab->plt_entry_size)));
6055
6056 /* If this symbol is not defined in a regular
6057 file, and we are not generating a shared
6058 library, then set the symbol to this location
6059 in the .plt. This is to avoid text
6060 relocations, and is required to make
6061 function pointers compare as equal between
6062 the normal executable and the shared library. */
6063 if (! bfd_link_pic (info)
6064 && h->def_dynamic
6065 && !h->def_regular)
6066 {
6067 h->root.u.def.section = s;
6068 h->root.u.def.value = plt_offset;
6069 }
6070
6071 /* Make room for this entry. */
6072 s->size += htab->plt_entry_size;
6073 /* After the 8192nd entry, room for two entries
6074 is allocated. */
6075 if (htab->plt_type == PLT_OLD
6076 && (s->size - htab->plt_initial_entry_size)
6077 / htab->plt_entry_size
6078 > PLT_NUM_SINGLE_ENTRIES)
6079 s->size += htab->plt_entry_size;
6080 }
6081 ent->plt.offset = plt_offset;
6082 }
6083
6084 /* We also need to make an entry in the .rela.plt section. */
6085 if (!doneone)
6086 {
6087 if (!dyn)
6088 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6089 else
6090 {
6091 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6092
6093 if (htab->plt_type == PLT_VXWORKS)
6094 {
6095 /* Allocate space for the unloaded relocations. */
6096 if (!bfd_link_pic (info)
6097 && htab->elf.dynamic_sections_created)
6098 {
6099 if (ent->plt.offset
6100 == (bfd_vma) htab->plt_initial_entry_size)
6101 {
6102 htab->srelplt2->size
6103 += (sizeof (Elf32_External_Rela)
6104 * VXWORKS_PLTRESOLVE_RELOCS);
6105 }
6106
6107 htab->srelplt2->size
6108 += (sizeof (Elf32_External_Rela)
6109 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6110 }
6111
6112 /* Every PLT entry has an associated GOT entry in
6113 .got.plt. */
6114 htab->elf.sgotplt->size += 4;
6115 }
6116 }
6117 doneone = TRUE;
6118 }
6119 }
6120 else
6121 ent->plt.offset = (bfd_vma) -1;
6122
6123 if (!doneone)
6124 {
6125 h->plt.plist = NULL;
6126 h->needs_plt = 0;
6127 }
6128 }
6129 else
6130 {
6131 h->plt.plist = NULL;
6132 h->needs_plt = 0;
6133 }
6134
6135 return TRUE;
6136 }
6137
6138 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6139 read-only sections. */
6140
6141 static bfd_boolean
6142 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6143 {
6144 asection *sec;
6145
6146 if (h->root.type == bfd_link_hash_indirect)
6147 return TRUE;
6148
6149 sec = readonly_dynrelocs (h);
6150 if (sec != NULL)
6151 {
6152 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6153
6154 info->flags |= DF_TEXTREL;
6155 info->callbacks->minfo
6156 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
6157 sec->owner, h->root.root.string, sec);
6158
6159 /* Not an error, just cut short the traversal. */
6160 return FALSE;
6161 }
6162 return TRUE;
6163 }
6164
6165 static const unsigned char glink_eh_frame_cie[] =
6166 {
6167 0, 0, 0, 16, /* length. */
6168 0, 0, 0, 0, /* id. */
6169 1, /* CIE version. */
6170 'z', 'R', 0, /* Augmentation string. */
6171 4, /* Code alignment. */
6172 0x7c, /* Data alignment. */
6173 65, /* RA reg. */
6174 1, /* Augmentation size. */
6175 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6176 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6177 };
6178
6179 /* Set the sizes of the dynamic sections. */
6180
6181 static bfd_boolean
6182 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6183 struct bfd_link_info *info)
6184 {
6185 struct ppc_elf_link_hash_table *htab;
6186 asection *s;
6187 bfd_boolean relocs;
6188 bfd *ibfd;
6189
6190 #ifdef DEBUG
6191 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6192 #endif
6193
6194 htab = ppc_elf_hash_table (info);
6195 BFD_ASSERT (htab->elf.dynobj != NULL);
6196
6197 if (elf_hash_table (info)->dynamic_sections_created)
6198 {
6199 /* Set the contents of the .interp section to the interpreter. */
6200 if (bfd_link_executable (info) && !info->nointerp)
6201 {
6202 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6203 BFD_ASSERT (s != NULL);
6204 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6205 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6206 }
6207 }
6208
6209 if (htab->plt_type == PLT_OLD)
6210 htab->got_header_size = 16;
6211 else if (htab->plt_type == PLT_NEW)
6212 htab->got_header_size = 12;
6213
6214 /* Set up .got offsets for local syms, and space for local dynamic
6215 relocs. */
6216 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6217 {
6218 bfd_signed_vma *local_got;
6219 bfd_signed_vma *end_local_got;
6220 struct plt_entry **local_plt;
6221 struct plt_entry **end_local_plt;
6222 char *lgot_masks;
6223 bfd_size_type locsymcount;
6224 Elf_Internal_Shdr *symtab_hdr;
6225
6226 if (!is_ppc_elf (ibfd))
6227 continue;
6228
6229 for (s = ibfd->sections; s != NULL; s = s->next)
6230 {
6231 struct ppc_dyn_relocs *p;
6232
6233 for (p = ((struct ppc_dyn_relocs *)
6234 elf_section_data (s)->local_dynrel);
6235 p != NULL;
6236 p = p->next)
6237 {
6238 if (!bfd_is_abs_section (p->sec)
6239 && bfd_is_abs_section (p->sec->output_section))
6240 {
6241 /* Input section has been discarded, either because
6242 it is a copy of a linkonce section or due to
6243 linker script /DISCARD/, so we'll be discarding
6244 the relocs too. */
6245 }
6246 else if (htab->is_vxworks
6247 && strcmp (p->sec->output_section->name,
6248 ".tls_vars") == 0)
6249 {
6250 /* Relocations in vxworks .tls_vars sections are
6251 handled specially by the loader. */
6252 }
6253 else if (p->count != 0)
6254 {
6255 asection *sreloc = elf_section_data (p->sec)->sreloc;
6256 if (p->ifunc)
6257 sreloc = htab->elf.irelplt;
6258 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6259 if ((p->sec->output_section->flags
6260 & (SEC_READONLY | SEC_ALLOC))
6261 == (SEC_READONLY | SEC_ALLOC))
6262 {
6263 info->flags |= DF_TEXTREL;
6264 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6265 p->sec->owner, p->sec);
6266 }
6267 }
6268 }
6269 }
6270
6271 local_got = elf_local_got_refcounts (ibfd);
6272 if (!local_got)
6273 continue;
6274
6275 symtab_hdr = &elf_symtab_hdr (ibfd);
6276 locsymcount = symtab_hdr->sh_info;
6277 end_local_got = local_got + locsymcount;
6278 local_plt = (struct plt_entry **) end_local_got;
6279 end_local_plt = local_plt + locsymcount;
6280 lgot_masks = (char *) end_local_plt;
6281
6282 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6283 if (*local_got > 0)
6284 {
6285 unsigned int need;
6286 if ((*lgot_masks & TLS_LD) != 0)
6287 htab->tlsld_got.refcount += 1;
6288 need = got_entries_needed (*lgot_masks);
6289 if (need == 0)
6290 *local_got = (bfd_vma) -1;
6291 else
6292 {
6293 *local_got = allocate_got (htab, need);
6294 if (bfd_link_pic (info))
6295 {
6296 asection *srel;
6297 bfd_boolean tprel_known = bfd_link_executable (info);
6298
6299 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6300 srel = htab->elf.srelgot;
6301 if ((*lgot_masks & PLT_IFUNC) != 0)
6302 srel = htab->elf.irelplt;
6303 srel->size += need;
6304 }
6305 }
6306 }
6307 else
6308 *local_got = (bfd_vma) -1;
6309
6310 if (htab->is_vxworks)
6311 continue;
6312
6313 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6314 for (; local_plt < end_local_plt; ++local_plt)
6315 {
6316 struct plt_entry *ent;
6317 bfd_boolean doneone = FALSE;
6318 bfd_vma plt_offset = 0, glink_offset = 0;
6319
6320 for (ent = *local_plt; ent != NULL; ent = ent->next)
6321 if (ent->plt.refcount > 0)
6322 {
6323 s = htab->elf.iplt;
6324
6325 if (!doneone)
6326 {
6327 plt_offset = s->size;
6328 s->size += 4;
6329 }
6330 ent->plt.offset = plt_offset;
6331
6332 s = htab->glink;
6333 if (!doneone || bfd_link_pic (info))
6334 {
6335 glink_offset = s->size;
6336 s->size += GLINK_ENTRY_SIZE;
6337 }
6338 ent->glink_offset = glink_offset;
6339
6340 if (!doneone)
6341 {
6342 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6343 doneone = TRUE;
6344 }
6345 }
6346 else
6347 ent->plt.offset = (bfd_vma) -1;
6348 }
6349 }
6350
6351 /* Allocate space for global sym dynamic relocs. */
6352 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6353
6354 if (htab->tlsld_got.refcount > 0)
6355 {
6356 htab->tlsld_got.offset = allocate_got (htab, 8);
6357 if (bfd_link_pic (info))
6358 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6359 }
6360 else
6361 htab->tlsld_got.offset = (bfd_vma) -1;
6362
6363 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6364 {
6365 unsigned int g_o_t = 32768;
6366
6367 /* If we haven't allocated the header, do so now. When we get here,
6368 for old plt/got the got size will be 0 to 32764 (not allocated),
6369 or 32780 to 65536 (header allocated). For new plt/got, the
6370 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6371 if (htab->elf.sgot->size <= 32768)
6372 {
6373 g_o_t = htab->elf.sgot->size;
6374 if (htab->plt_type == PLT_OLD)
6375 g_o_t += 4;
6376 htab->elf.sgot->size += htab->got_header_size;
6377 }
6378
6379 htab->elf.hgot->root.u.def.value = g_o_t;
6380 }
6381 if (bfd_link_pic (info))
6382 {
6383 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6384
6385 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6386 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6387 }
6388 if (info->emitrelocations)
6389 {
6390 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6391
6392 if (sda != NULL && sda->ref_regular)
6393 sda->root.u.def.section->flags |= SEC_KEEP;
6394 sda = htab->sdata[1].sym;
6395 if (sda != NULL && sda->ref_regular)
6396 sda->root.u.def.section->flags |= SEC_KEEP;
6397 }
6398
6399 if (htab->glink != NULL
6400 && htab->glink->size != 0
6401 && htab->elf.dynamic_sections_created)
6402 {
6403 htab->glink_pltresolve = htab->glink->size;
6404 /* Space for the branch table. ??? We don't need entries for
6405 non-dynamic symbols in this table. This case can arise with
6406 static ifuncs or forced local ifuncs. */
6407 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6408 /* Pad out to align the start of PLTresolve. */
6409 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6410 ? 63 : 15);
6411 htab->glink->size += GLINK_PLTRESOLVE;
6412
6413 if (htab->params->emit_stub_syms)
6414 {
6415 struct elf_link_hash_entry *sh;
6416 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6417 TRUE, FALSE, FALSE);
6418 if (sh == NULL)
6419 return FALSE;
6420 if (sh->root.type == bfd_link_hash_new)
6421 {
6422 sh->root.type = bfd_link_hash_defined;
6423 sh->root.u.def.section = htab->glink;
6424 sh->root.u.def.value = htab->glink_pltresolve;
6425 sh->ref_regular = 1;
6426 sh->def_regular = 1;
6427 sh->ref_regular_nonweak = 1;
6428 sh->forced_local = 1;
6429 sh->non_elf = 0;
6430 sh->root.linker_def = 1;
6431 }
6432 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6433 TRUE, FALSE, FALSE);
6434 if (sh == NULL)
6435 return FALSE;
6436 if (sh->root.type == bfd_link_hash_new)
6437 {
6438 sh->root.type = bfd_link_hash_defined;
6439 sh->root.u.def.section = htab->glink;
6440 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6441 sh->ref_regular = 1;
6442 sh->def_regular = 1;
6443 sh->ref_regular_nonweak = 1;
6444 sh->forced_local = 1;
6445 sh->non_elf = 0;
6446 sh->root.linker_def = 1;
6447 }
6448 }
6449 }
6450
6451 if (htab->glink != NULL
6452 && htab->glink->size != 0
6453 && htab->glink_eh_frame != NULL
6454 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6455 && _bfd_elf_eh_frame_present (info))
6456 {
6457 s = htab->glink_eh_frame;
6458 s->size = sizeof (glink_eh_frame_cie) + 20;
6459 if (bfd_link_pic (info))
6460 {
6461 s->size += 4;
6462 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6463 s->size += 4;
6464 }
6465 }
6466
6467 /* We've now determined the sizes of the various dynamic sections.
6468 Allocate memory for them. */
6469 relocs = FALSE;
6470 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6471 {
6472 bfd_boolean strip_section = TRUE;
6473
6474 if ((s->flags & SEC_LINKER_CREATED) == 0)
6475 continue;
6476
6477 if (s == htab->elf.splt
6478 || s == htab->elf.sgot)
6479 {
6480 /* We'd like to strip these sections if they aren't needed, but if
6481 we've exported dynamic symbols from them we must leave them.
6482 It's too late to tell BFD to get rid of the symbols. */
6483 if (htab->elf.hplt != NULL)
6484 strip_section = FALSE;
6485 /* Strip this section if we don't need it; see the
6486 comment below. */
6487 }
6488 else if (s == htab->elf.iplt
6489 || s == htab->glink
6490 || s == htab->glink_eh_frame
6491 || s == htab->elf.sgotplt
6492 || s == htab->sbss
6493 || s == htab->elf.sdynbss
6494 || s == htab->elf.sdynrelro
6495 || s == htab->dynsbss)
6496 {
6497 /* Strip these too. */
6498 }
6499 else if (s == htab->sdata[0].section
6500 || s == htab->sdata[1].section)
6501 {
6502 strip_section = (s->flags & SEC_KEEP) == 0;
6503 }
6504 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6505 ".rela"))
6506 {
6507 if (s->size != 0)
6508 {
6509 /* Remember whether there are any relocation sections. */
6510 relocs = TRUE;
6511
6512 /* We use the reloc_count field as a counter if we need
6513 to copy relocs into the output file. */
6514 s->reloc_count = 0;
6515 }
6516 }
6517 else
6518 {
6519 /* It's not one of our sections, so don't allocate space. */
6520 continue;
6521 }
6522
6523 if (s->size == 0 && strip_section)
6524 {
6525 /* If we don't need this section, strip it from the
6526 output file. This is mostly to handle .rela.bss and
6527 .rela.plt. We must create both sections in
6528 create_dynamic_sections, because they must be created
6529 before the linker maps input sections to output
6530 sections. The linker does that before
6531 adjust_dynamic_symbol is called, and it is that
6532 function which decides whether anything needs to go
6533 into these sections. */
6534 s->flags |= SEC_EXCLUDE;
6535 continue;
6536 }
6537
6538 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6539 continue;
6540
6541 /* Allocate memory for the section contents. */
6542 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6543 if (s->contents == NULL)
6544 return FALSE;
6545 }
6546
6547 if (htab->elf.dynamic_sections_created)
6548 {
6549 /* Add some entries to the .dynamic section. We fill in the
6550 values later, in ppc_elf_finish_dynamic_sections, but we
6551 must add the entries now so that we get the correct size for
6552 the .dynamic section. The DT_DEBUG entry is filled in by the
6553 dynamic linker and used by the debugger. */
6554 #define add_dynamic_entry(TAG, VAL) \
6555 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6556
6557 if (bfd_link_executable (info))
6558 {
6559 if (!add_dynamic_entry (DT_DEBUG, 0))
6560 return FALSE;
6561 }
6562
6563 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6564 {
6565 if (!add_dynamic_entry (DT_PLTGOT, 0)
6566 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6567 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6568 || !add_dynamic_entry (DT_JMPREL, 0))
6569 return FALSE;
6570 }
6571
6572 if (htab->plt_type == PLT_NEW
6573 && htab->glink != NULL
6574 && htab->glink->size != 0)
6575 {
6576 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6577 return FALSE;
6578 if (!htab->params->no_tls_get_addr_opt
6579 && htab->tls_get_addr != NULL
6580 && htab->tls_get_addr->plt.plist != NULL
6581 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6582 return FALSE;
6583 }
6584
6585 if (relocs)
6586 {
6587 if (!add_dynamic_entry (DT_RELA, 0)
6588 || !add_dynamic_entry (DT_RELASZ, 0)
6589 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6590 return FALSE;
6591 }
6592
6593 /* If any dynamic relocs apply to a read-only section, then we
6594 need a DT_TEXTREL entry. */
6595 if ((info->flags & DF_TEXTREL) == 0)
6596 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6597 info);
6598
6599 if ((info->flags & DF_TEXTREL) != 0)
6600 {
6601 if (!add_dynamic_entry (DT_TEXTREL, 0))
6602 return FALSE;
6603 }
6604 if (htab->is_vxworks
6605 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6606 return FALSE;
6607 }
6608 #undef add_dynamic_entry
6609
6610 if (htab->glink_eh_frame != NULL
6611 && htab->glink_eh_frame->contents != NULL)
6612 {
6613 unsigned char *p = htab->glink_eh_frame->contents;
6614 bfd_vma val;
6615
6616 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6617 /* CIE length (rewrite in case little-endian). */
6618 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6619 p += sizeof (glink_eh_frame_cie);
6620 /* FDE length. */
6621 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6622 bfd_put_32 (htab->elf.dynobj, val, p);
6623 p += 4;
6624 /* CIE pointer. */
6625 val = p - htab->glink_eh_frame->contents;
6626 bfd_put_32 (htab->elf.dynobj, val, p);
6627 p += 4;
6628 /* Offset to .glink. Set later. */
6629 p += 4;
6630 /* .glink size. */
6631 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6632 p += 4;
6633 /* Augmentation. */
6634 p += 1;
6635
6636 if (bfd_link_pic (info)
6637 && htab->elf.dynamic_sections_created)
6638 {
6639 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6640 if (adv < 64)
6641 *p++ = DW_CFA_advance_loc + adv;
6642 else if (adv < 256)
6643 {
6644 *p++ = DW_CFA_advance_loc1;
6645 *p++ = adv;
6646 }
6647 else if (adv < 65536)
6648 {
6649 *p++ = DW_CFA_advance_loc2;
6650 bfd_put_16 (htab->elf.dynobj, adv, p);
6651 p += 2;
6652 }
6653 else
6654 {
6655 *p++ = DW_CFA_advance_loc4;
6656 bfd_put_32 (htab->elf.dynobj, adv, p);
6657 p += 4;
6658 }
6659 *p++ = DW_CFA_register;
6660 *p++ = 65;
6661 p++;
6662 *p++ = DW_CFA_advance_loc + 4;
6663 *p++ = DW_CFA_restore_extended;
6664 *p++ = 65;
6665 }
6666 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6667 == htab->glink_eh_frame->size);
6668 }
6669
6670 return TRUE;
6671 }
6672
6673 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6674 if it looks like nothing is using them. */
6675
6676 static void
6677 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6678 {
6679 struct elf_link_hash_entry *sda = lsect->sym;
6680
6681 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6682 {
6683 asection *s;
6684
6685 s = bfd_get_section_by_name (output_bfd, lsect->name);
6686 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6687 {
6688 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6689 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6690 {
6691 sda->def_regular = 0;
6692 /* This is somewhat magic. See elf_link_output_extsym. */
6693 sda->ref_dynamic = 1;
6694 sda->forced_local = 0;
6695 }
6696 }
6697 }
6698 }
6699
6700 void
6701 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6702 {
6703 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6704
6705 if (htab != NULL)
6706 {
6707 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6708 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6709 }
6710 }
6711
6712
6713 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6714
6715 static bfd_boolean
6716 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6717 {
6718 if (h->plt.plist != NULL
6719 && !h->def_regular
6720 && (!h->pointer_equality_needed
6721 || !h->ref_regular_nonweak))
6722 return FALSE;
6723
6724 return _bfd_elf_hash_symbol (h);
6725 }
6726 \f
6727 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6728
6729 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6730 used for some functions that are allowed to break the ABI). */
6731 static const int shared_stub_entry[] =
6732 {
6733 0x7c0802a6, /* mflr 0 */
6734 0x429f0005, /* bcl 20, 31, .Lxxx */
6735 0x7d8802a6, /* mflr 12 */
6736 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6737 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6738 0x7c0803a6, /* mtlr 0 */
6739 0x7d8903a6, /* mtctr 12 */
6740 0x4e800420, /* bctr */
6741 };
6742
6743 static const int stub_entry[] =
6744 {
6745 0x3d800000, /* lis 12,xxx@ha */
6746 0x398c0000, /* addi 12,12,xxx@l */
6747 0x7d8903a6, /* mtctr 12 */
6748 0x4e800420, /* bctr */
6749 };
6750
6751 struct ppc_elf_relax_info
6752 {
6753 unsigned int workaround_size;
6754 unsigned int picfixup_size;
6755 };
6756
6757 /* This function implements long branch trampolines, and the ppc476
6758 icache bug workaround. Any section needing trampolines or patch
6759 space for the workaround has its size extended so that we can
6760 add trampolines at the end of the section. */
6761
6762 static bfd_boolean
6763 ppc_elf_relax_section (bfd *abfd,
6764 asection *isec,
6765 struct bfd_link_info *link_info,
6766 bfd_boolean *again)
6767 {
6768 struct one_branch_fixup
6769 {
6770 struct one_branch_fixup *next;
6771 asection *tsec;
6772 /* Final link, can use the symbol offset. For a
6773 relocatable link we use the symbol's index. */
6774 bfd_vma toff;
6775 bfd_vma trampoff;
6776 };
6777
6778 Elf_Internal_Shdr *symtab_hdr;
6779 bfd_byte *contents = NULL;
6780 Elf_Internal_Sym *isymbuf = NULL;
6781 Elf_Internal_Rela *internal_relocs = NULL;
6782 Elf_Internal_Rela *irel, *irelend = NULL;
6783 struct one_branch_fixup *branch_fixups = NULL;
6784 struct ppc_elf_relax_info *relax_info = NULL;
6785 unsigned changes = 0;
6786 bfd_boolean workaround_change;
6787 struct ppc_elf_link_hash_table *htab;
6788 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6789 asection *got2;
6790 bfd_boolean maybe_pasted;
6791
6792 *again = FALSE;
6793
6794 /* No need to do anything with non-alloc or non-code sections. */
6795 if ((isec->flags & SEC_ALLOC) == 0
6796 || (isec->flags & SEC_CODE) == 0
6797 || (isec->flags & SEC_LINKER_CREATED) != 0
6798 || isec->size < 4)
6799 return TRUE;
6800
6801 /* We cannot represent the required PIC relocs in the output, so don't
6802 do anything. The linker doesn't support mixing -shared and -r
6803 anyway. */
6804 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6805 return TRUE;
6806
6807 htab = ppc_elf_hash_table (link_info);
6808 if (htab == NULL)
6809 return TRUE;
6810
6811 isec->size = (isec->size + 3) & -4;
6812 if (isec->rawsize == 0)
6813 isec->rawsize = isec->size;
6814 trampbase = isec->size;
6815
6816 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6817 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6818 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6819
6820 if (htab->params->ppc476_workaround
6821 || htab->params->pic_fixup > 0)
6822 {
6823 if (elf_section_data (isec)->sec_info == NULL)
6824 {
6825 elf_section_data (isec)->sec_info
6826 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6827 if (elf_section_data (isec)->sec_info == NULL)
6828 return FALSE;
6829 }
6830 relax_info = elf_section_data (isec)->sec_info;
6831 trampbase -= relax_info->workaround_size;
6832 }
6833
6834 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6835 || strcmp (isec->output_section->name, ".fini") == 0);
6836 /* Space for a branch around any trampolines. */
6837 trampoff = trampbase;
6838 if (maybe_pasted && trampbase == isec->rawsize)
6839 trampoff += 4;
6840
6841 symtab_hdr = &elf_symtab_hdr (abfd);
6842 picfixup_size = 0;
6843 if (htab->params->branch_trampolines
6844 || htab->params->pic_fixup > 0)
6845 {
6846 /* Get a copy of the native relocations. */
6847 if (isec->reloc_count != 0)
6848 {
6849 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6850 link_info->keep_memory);
6851 if (internal_relocs == NULL)
6852 goto error_return;
6853 }
6854
6855 got2 = bfd_get_section_by_name (abfd, ".got2");
6856
6857 irelend = internal_relocs + isec->reloc_count;
6858 for (irel = internal_relocs; irel < irelend; irel++)
6859 {
6860 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6861 bfd_vma toff, roff;
6862 asection *tsec;
6863 struct one_branch_fixup *f;
6864 size_t insn_offset = 0;
6865 bfd_vma max_branch_offset = 0, val;
6866 bfd_byte *hit_addr;
6867 unsigned long t0;
6868 struct elf_link_hash_entry *h;
6869 struct plt_entry **plist;
6870 unsigned char sym_type;
6871
6872 switch (r_type)
6873 {
6874 case R_PPC_REL24:
6875 case R_PPC_LOCAL24PC:
6876 case R_PPC_PLTREL24:
6877 max_branch_offset = 1 << 25;
6878 break;
6879
6880 case R_PPC_REL14:
6881 case R_PPC_REL14_BRTAKEN:
6882 case R_PPC_REL14_BRNTAKEN:
6883 max_branch_offset = 1 << 15;
6884 break;
6885
6886 case R_PPC_ADDR16_HA:
6887 if (htab->params->pic_fixup > 0)
6888 break;
6889 continue;
6890
6891 default:
6892 continue;
6893 }
6894
6895 /* Get the value of the symbol referred to by the reloc. */
6896 h = NULL;
6897 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6898 {
6899 /* A local symbol. */
6900 Elf_Internal_Sym *isym;
6901
6902 /* Read this BFD's local symbols. */
6903 if (isymbuf == NULL)
6904 {
6905 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6906 if (isymbuf == NULL)
6907 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6908 symtab_hdr->sh_info, 0,
6909 NULL, NULL, NULL);
6910 if (isymbuf == 0)
6911 goto error_return;
6912 }
6913 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6914 if (isym->st_shndx == SHN_UNDEF)
6915 tsec = bfd_und_section_ptr;
6916 else if (isym->st_shndx == SHN_ABS)
6917 tsec = bfd_abs_section_ptr;
6918 else if (isym->st_shndx == SHN_COMMON)
6919 tsec = bfd_com_section_ptr;
6920 else
6921 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6922
6923 toff = isym->st_value;
6924 sym_type = ELF_ST_TYPE (isym->st_info);
6925 }
6926 else
6927 {
6928 /* Global symbol handling. */
6929 unsigned long indx;
6930
6931 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6932 h = elf_sym_hashes (abfd)[indx];
6933
6934 while (h->root.type == bfd_link_hash_indirect
6935 || h->root.type == bfd_link_hash_warning)
6936 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6937
6938 if (h->root.type == bfd_link_hash_defined
6939 || h->root.type == bfd_link_hash_defweak)
6940 {
6941 tsec = h->root.u.def.section;
6942 toff = h->root.u.def.value;
6943 }
6944 else if (h->root.type == bfd_link_hash_undefined
6945 || h->root.type == bfd_link_hash_undefweak)
6946 {
6947 tsec = bfd_und_section_ptr;
6948 toff = bfd_link_relocatable (link_info) ? indx : 0;
6949 }
6950 else
6951 continue;
6952
6953 /* If this branch is to __tls_get_addr then we may later
6954 optimise away the call. We won't be needing a long-
6955 branch stub in that case. */
6956 if (bfd_link_executable (link_info)
6957 && h == htab->tls_get_addr
6958 && irel != internal_relocs)
6959 {
6960 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6961 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6962 unsigned int tls_mask = 0;
6963
6964 /* The previous reloc should be one of R_PPC_TLSGD or
6965 R_PPC_TLSLD, or for older object files, a reloc
6966 on the __tls_get_addr arg setup insn. Get tls
6967 mask bits from the symbol on that reloc. */
6968 if (t_symndx < symtab_hdr->sh_info)
6969 {
6970 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6971
6972 if (local_got_offsets != NULL)
6973 {
6974 struct plt_entry **local_plt = (struct plt_entry **)
6975 (local_got_offsets + symtab_hdr->sh_info);
6976 char *lgot_masks = (char *)
6977 (local_plt + symtab_hdr->sh_info);
6978 tls_mask = lgot_masks[t_symndx];
6979 }
6980 }
6981 else
6982 {
6983 struct elf_link_hash_entry *th
6984 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6985
6986 while (th->root.type == bfd_link_hash_indirect
6987 || th->root.type == bfd_link_hash_warning)
6988 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6989
6990 tls_mask
6991 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6992 }
6993
6994 /* The mask bits tell us if the call will be
6995 optimised away. */
6996 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6997 && (t_rtype == R_PPC_TLSGD
6998 || t_rtype == R_PPC_GOT_TLSGD16
6999 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7000 continue;
7001 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7002 && (t_rtype == R_PPC_TLSLD
7003 || t_rtype == R_PPC_GOT_TLSLD16
7004 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7005 continue;
7006 }
7007
7008 sym_type = h->type;
7009 }
7010
7011 if (r_type == R_PPC_ADDR16_HA)
7012 {
7013 if (h != NULL
7014 && !h->def_regular
7015 && h->protected_def
7016 && ppc_elf_hash_entry (h)->has_addr16_ha
7017 && ppc_elf_hash_entry (h)->has_addr16_lo)
7018 picfixup_size += 12;
7019 continue;
7020 }
7021
7022 /* The condition here under which we call find_plt_ent must
7023 match that in relocate_section. If we call find_plt_ent here
7024 but not in relocate_section, or vice versa, then the branch
7025 destination used here may be incorrect. */
7026 plist = NULL;
7027 if (h != NULL)
7028 {
7029 /* We know is_branch_reloc (r_type) is true. */
7030 if (h->type == STT_GNU_IFUNC
7031 || r_type == R_PPC_PLTREL24)
7032 plist = &h->plt.plist;
7033 }
7034 else if (sym_type == STT_GNU_IFUNC
7035 && elf_local_got_offsets (abfd) != NULL)
7036 {
7037 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7038 struct plt_entry **local_plt = (struct plt_entry **)
7039 (local_got_offsets + symtab_hdr->sh_info);
7040 plist = local_plt + ELF32_R_SYM (irel->r_info);
7041 }
7042 if (plist != NULL)
7043 {
7044 bfd_vma addend = 0;
7045 struct plt_entry *ent;
7046
7047 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7048 addend = irel->r_addend;
7049 ent = find_plt_ent (plist, got2, addend);
7050 if (ent != NULL)
7051 {
7052 if (htab->plt_type == PLT_NEW
7053 || h == NULL
7054 || !htab->elf.dynamic_sections_created
7055 || h->dynindx == -1)
7056 {
7057 tsec = htab->glink;
7058 toff = ent->glink_offset;
7059 }
7060 else
7061 {
7062 tsec = htab->elf.splt;
7063 toff = ent->plt.offset;
7064 }
7065 }
7066 }
7067
7068 /* If the branch and target are in the same section, you have
7069 no hope of adding stubs. We'll error out later should the
7070 branch overflow. */
7071 if (tsec == isec)
7072 continue;
7073
7074 /* There probably isn't any reason to handle symbols in
7075 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7076 attribute for a code section, and we are only looking at
7077 branches. However, implement it correctly here as a
7078 reference for other target relax_section functions. */
7079 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7080 {
7081 /* At this stage in linking, no SEC_MERGE symbol has been
7082 adjusted, so all references to such symbols need to be
7083 passed through _bfd_merged_section_offset. (Later, in
7084 relocate_section, all SEC_MERGE symbols *except* for
7085 section symbols have been adjusted.)
7086
7087 gas may reduce relocations against symbols in SEC_MERGE
7088 sections to a relocation against the section symbol when
7089 the original addend was zero. When the reloc is against
7090 a section symbol we should include the addend in the
7091 offset passed to _bfd_merged_section_offset, since the
7092 location of interest is the original symbol. On the
7093 other hand, an access to "sym+addend" where "sym" is not
7094 a section symbol should not include the addend; Such an
7095 access is presumed to be an offset from "sym"; The
7096 location of interest is just "sym". */
7097 if (sym_type == STT_SECTION)
7098 toff += irel->r_addend;
7099
7100 toff
7101 = _bfd_merged_section_offset (abfd, &tsec,
7102 elf_section_data (tsec)->sec_info,
7103 toff);
7104
7105 if (sym_type != STT_SECTION)
7106 toff += irel->r_addend;
7107 }
7108 /* PLTREL24 addends are special. */
7109 else if (r_type != R_PPC_PLTREL24)
7110 toff += irel->r_addend;
7111
7112 /* Attempted -shared link of non-pic code loses. */
7113 if ((!bfd_link_relocatable (link_info)
7114 && tsec == bfd_und_section_ptr)
7115 || tsec->output_section == NULL
7116 || (tsec->owner != NULL
7117 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7118 continue;
7119
7120 roff = irel->r_offset;
7121
7122 /* If the branch is in range, no need to do anything. */
7123 if (tsec != bfd_und_section_ptr
7124 && (!bfd_link_relocatable (link_info)
7125 /* A relocatable link may have sections moved during
7126 final link, so do not presume they remain in range. */
7127 || tsec->output_section == isec->output_section))
7128 {
7129 bfd_vma symaddr, reladdr;
7130
7131 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7132 reladdr = isec->output_section->vma + isec->output_offset + roff;
7133 if (symaddr - reladdr + max_branch_offset
7134 < 2 * max_branch_offset)
7135 continue;
7136 }
7137
7138 /* Look for an existing fixup to this address. */
7139 for (f = branch_fixups; f ; f = f->next)
7140 if (f->tsec == tsec && f->toff == toff)
7141 break;
7142
7143 if (f == NULL)
7144 {
7145 size_t size;
7146 unsigned long stub_rtype;
7147
7148 val = trampoff - roff;
7149 if (val >= max_branch_offset)
7150 /* Oh dear, we can't reach a trampoline. Don't try to add
7151 one. We'll report an error later. */
7152 continue;
7153
7154 if (bfd_link_pic (link_info))
7155 {
7156 size = 4 * ARRAY_SIZE (shared_stub_entry);
7157 insn_offset = 12;
7158 }
7159 else
7160 {
7161 size = 4 * ARRAY_SIZE (stub_entry);
7162 insn_offset = 0;
7163 }
7164 stub_rtype = R_PPC_RELAX;
7165 if (tsec == htab->elf.splt
7166 || tsec == htab->glink)
7167 {
7168 stub_rtype = R_PPC_RELAX_PLT;
7169 if (r_type == R_PPC_PLTREL24)
7170 stub_rtype = R_PPC_RELAX_PLTREL24;
7171 }
7172
7173 /* Hijack the old relocation. Since we need two
7174 relocations for this use a "composite" reloc. */
7175 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7176 stub_rtype);
7177 irel->r_offset = trampoff + insn_offset;
7178 if (r_type == R_PPC_PLTREL24
7179 && stub_rtype != R_PPC_RELAX_PLTREL24)
7180 irel->r_addend = 0;
7181
7182 /* Record the fixup so we don't do it again this section. */
7183 f = bfd_malloc (sizeof (*f));
7184 f->next = branch_fixups;
7185 f->tsec = tsec;
7186 f->toff = toff;
7187 f->trampoff = trampoff;
7188 branch_fixups = f;
7189
7190 trampoff += size;
7191 changes++;
7192 }
7193 else
7194 {
7195 val = f->trampoff - roff;
7196 if (val >= max_branch_offset)
7197 continue;
7198
7199 /* Nop out the reloc, since we're finalizing things here. */
7200 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7201 }
7202
7203 /* Get the section contents. */
7204 if (contents == NULL)
7205 {
7206 /* Get cached copy if it exists. */
7207 if (elf_section_data (isec)->this_hdr.contents != NULL)
7208 contents = elf_section_data (isec)->this_hdr.contents;
7209 /* Go get them off disk. */
7210 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7211 goto error_return;
7212 }
7213
7214 /* Fix up the existing branch to hit the trampoline. */
7215 hit_addr = contents + roff;
7216 switch (r_type)
7217 {
7218 case R_PPC_REL24:
7219 case R_PPC_LOCAL24PC:
7220 case R_PPC_PLTREL24:
7221 t0 = bfd_get_32 (abfd, hit_addr);
7222 t0 &= ~0x3fffffc;
7223 t0 |= val & 0x3fffffc;
7224 bfd_put_32 (abfd, t0, hit_addr);
7225 break;
7226
7227 case R_PPC_REL14:
7228 case R_PPC_REL14_BRTAKEN:
7229 case R_PPC_REL14_BRNTAKEN:
7230 t0 = bfd_get_32 (abfd, hit_addr);
7231 t0 &= ~0xfffc;
7232 t0 |= val & 0xfffc;
7233 bfd_put_32 (abfd, t0, hit_addr);
7234 break;
7235 }
7236 }
7237
7238 while (branch_fixups != NULL)
7239 {
7240 struct one_branch_fixup *f = branch_fixups;
7241 branch_fixups = branch_fixups->next;
7242 free (f);
7243 }
7244 }
7245
7246 workaround_change = FALSE;
7247 newsize = trampoff;
7248 if (htab->params->ppc476_workaround
7249 && (!bfd_link_relocatable (link_info)
7250 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7251 {
7252 bfd_vma addr, end_addr;
7253 unsigned int crossings;
7254 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7255
7256 addr = isec->output_section->vma + isec->output_offset;
7257 end_addr = addr + trampoff;
7258 addr &= -pagesize;
7259 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7260 if (crossings != 0)
7261 {
7262 /* Keep space aligned, to ensure the patch code itself does
7263 not cross a page. Don't decrease size calculated on a
7264 previous pass as otherwise we might never settle on a layout. */
7265 newsize = 15 - ((end_addr - 1) & 15);
7266 newsize += crossings * 16;
7267 if (relax_info->workaround_size < newsize)
7268 {
7269 relax_info->workaround_size = newsize;
7270 workaround_change = TRUE;
7271 }
7272 /* Ensure relocate_section is called. */
7273 isec->flags |= SEC_RELOC;
7274 }
7275 newsize = trampoff + relax_info->workaround_size;
7276 }
7277
7278 if (htab->params->pic_fixup > 0)
7279 {
7280 picfixup_size -= relax_info->picfixup_size;
7281 if (picfixup_size != 0)
7282 relax_info->picfixup_size += picfixup_size;
7283 newsize += relax_info->picfixup_size;
7284 }
7285
7286 if (changes != 0 || picfixup_size != 0 || workaround_change)
7287 isec->size = newsize;
7288
7289 if (isymbuf != NULL
7290 && symtab_hdr->contents != (unsigned char *) isymbuf)
7291 {
7292 if (! link_info->keep_memory)
7293 free (isymbuf);
7294 else
7295 {
7296 /* Cache the symbols for elf_link_input_bfd. */
7297 symtab_hdr->contents = (unsigned char *) isymbuf;
7298 }
7299 }
7300
7301 if (contents != NULL
7302 && elf_section_data (isec)->this_hdr.contents != contents)
7303 {
7304 if (!changes && !link_info->keep_memory)
7305 free (contents);
7306 else
7307 {
7308 /* Cache the section contents for elf_link_input_bfd. */
7309 elf_section_data (isec)->this_hdr.contents = contents;
7310 }
7311 }
7312
7313 changes += picfixup_size;
7314 if (changes != 0)
7315 {
7316 /* Append sufficient NOP relocs so we can write out relocation
7317 information for the trampolines. */
7318 Elf_Internal_Shdr *rel_hdr;
7319 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7320 * sizeof (*new_relocs));
7321 unsigned ix;
7322
7323 if (!new_relocs)
7324 goto error_return;
7325 memcpy (new_relocs, internal_relocs,
7326 isec->reloc_count * sizeof (*new_relocs));
7327 for (ix = changes; ix--;)
7328 {
7329 irel = new_relocs + ix + isec->reloc_count;
7330
7331 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7332 }
7333 if (internal_relocs != elf_section_data (isec)->relocs)
7334 free (internal_relocs);
7335 elf_section_data (isec)->relocs = new_relocs;
7336 isec->reloc_count += changes;
7337 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7338 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7339 }
7340 else if (internal_relocs != NULL
7341 && elf_section_data (isec)->relocs != internal_relocs)
7342 free (internal_relocs);
7343
7344 *again = changes != 0 || workaround_change;
7345 return TRUE;
7346
7347 error_return:
7348 while (branch_fixups != NULL)
7349 {
7350 struct one_branch_fixup *f = branch_fixups;
7351 branch_fixups = branch_fixups->next;
7352 free (f);
7353 }
7354 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7355 free (isymbuf);
7356 if (contents != NULL
7357 && elf_section_data (isec)->this_hdr.contents != contents)
7358 free (contents);
7359 if (internal_relocs != NULL
7360 && elf_section_data (isec)->relocs != internal_relocs)
7361 free (internal_relocs);
7362 return FALSE;
7363 }
7364 \f
7365 /* What to do when ld finds relocations against symbols defined in
7366 discarded sections. */
7367
7368 static unsigned int
7369 ppc_elf_action_discarded (asection *sec)
7370 {
7371 if (strcmp (".fixup", sec->name) == 0)
7372 return 0;
7373
7374 if (strcmp (".got2", sec->name) == 0)
7375 return 0;
7376
7377 return _bfd_elf_default_action_discarded (sec);
7378 }
7379 \f
7380 /* Fill in the address for a pointer generated in a linker section. */
7381
7382 static bfd_vma
7383 elf_finish_pointer_linker_section (bfd *input_bfd,
7384 elf_linker_section_t *lsect,
7385 struct elf_link_hash_entry *h,
7386 bfd_vma relocation,
7387 const Elf_Internal_Rela *rel)
7388 {
7389 elf_linker_section_pointers_t *linker_section_ptr;
7390
7391 BFD_ASSERT (lsect != NULL);
7392
7393 if (h != NULL)
7394 {
7395 /* Handle global symbol. */
7396 struct ppc_elf_link_hash_entry *eh;
7397
7398 eh = (struct ppc_elf_link_hash_entry *) h;
7399 BFD_ASSERT (eh->elf.def_regular);
7400 linker_section_ptr = eh->linker_section_pointer;
7401 }
7402 else
7403 {
7404 /* Handle local symbol. */
7405 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7406
7407 BFD_ASSERT (is_ppc_elf (input_bfd));
7408 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7409 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7410 }
7411
7412 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7413 rel->r_addend,
7414 lsect);
7415 BFD_ASSERT (linker_section_ptr != NULL);
7416
7417 /* Offset will always be a multiple of four, so use the bottom bit
7418 as a "written" flag. */
7419 if ((linker_section_ptr->offset & 1) == 0)
7420 {
7421 bfd_put_32 (lsect->section->owner,
7422 relocation + linker_section_ptr->addend,
7423 lsect->section->contents + linker_section_ptr->offset);
7424 linker_section_ptr->offset += 1;
7425 }
7426
7427 relocation = (lsect->section->output_section->vma
7428 + lsect->section->output_offset
7429 + linker_section_ptr->offset - 1
7430 - SYM_VAL (lsect->sym));
7431
7432 #ifdef DEBUG
7433 fprintf (stderr,
7434 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7435 lsect->name, (long) relocation, (long) relocation);
7436 #endif
7437
7438 return relocation;
7439 }
7440
7441 #define PPC_LO(v) ((v) & 0xffff)
7442 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7443 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7444
7445 static void
7446 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7447 struct bfd_link_info *info)
7448 {
7449 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7450 bfd *output_bfd = info->output_bfd;
7451 bfd_vma plt;
7452
7453 plt = ((ent->plt.offset & ~1)
7454 + plt_sec->output_section->vma
7455 + plt_sec->output_offset);
7456
7457 if (bfd_link_pic (info))
7458 {
7459 bfd_vma got = 0;
7460
7461 if (ent->addend >= 32768)
7462 got = (ent->addend
7463 + ent->sec->output_section->vma
7464 + ent->sec->output_offset);
7465 else if (htab->elf.hgot != NULL)
7466 got = SYM_VAL (htab->elf.hgot);
7467
7468 plt -= got;
7469
7470 if (plt + 0x8000 < 0x10000)
7471 {
7472 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7473 p += 4;
7474 bfd_put_32 (output_bfd, MTCTR_11, p);
7475 p += 4;
7476 bfd_put_32 (output_bfd, BCTR, p);
7477 p += 4;
7478 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7479 p += 4;
7480 }
7481 else
7482 {
7483 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7484 p += 4;
7485 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7486 p += 4;
7487 bfd_put_32 (output_bfd, MTCTR_11, p);
7488 p += 4;
7489 bfd_put_32 (output_bfd, BCTR, p);
7490 p += 4;
7491 }
7492 }
7493 else
7494 {
7495 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7496 p += 4;
7497 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7498 p += 4;
7499 bfd_put_32 (output_bfd, MTCTR_11, p);
7500 p += 4;
7501 bfd_put_32 (output_bfd, BCTR, p);
7502 p += 4;
7503 }
7504 }
7505
7506 /* Return true if symbol is defined statically. */
7507
7508 static bfd_boolean
7509 is_static_defined (struct elf_link_hash_entry *h)
7510 {
7511 return ((h->root.type == bfd_link_hash_defined
7512 || h->root.type == bfd_link_hash_defweak)
7513 && h->root.u.def.section != NULL
7514 && h->root.u.def.section->output_section != NULL);
7515 }
7516
7517 /* If INSN is an opcode that may be used with an @tls operand, return
7518 the transformed insn for TLS optimisation, otherwise return 0. If
7519 REG is non-zero only match an insn with RB or RA equal to REG. */
7520
7521 unsigned int
7522 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7523 {
7524 unsigned int rtra;
7525
7526 if ((insn & (0x3f << 26)) != 31 << 26)
7527 return 0;
7528
7529 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7530 rtra = insn & ((1 << 26) - (1 << 16));
7531 else if (((insn >> 16) & 0x1f) == reg)
7532 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7533 else
7534 return 0;
7535
7536 if ((insn & (0x3ff << 1)) == 266 << 1)
7537 /* add -> addi. */
7538 insn = 14 << 26;
7539 else if ((insn & (0x1f << 1)) == 23 << 1
7540 && ((insn & (0x1f << 6)) < 14 << 6
7541 || ((insn & (0x1f << 6)) >= 16 << 6
7542 && (insn & (0x1f << 6)) < 24 << 6)))
7543 /* load and store indexed -> dform. */
7544 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7545 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7546 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7547 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7548 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7549 /* lwax -> lwa. */
7550 insn = (58 << 26) | 2;
7551 else
7552 return 0;
7553 insn |= rtra;
7554 return insn;
7555 }
7556
7557 /* If INSN is an opcode that may be used with an @tprel operand, return
7558 the transformed insn for an undefined weak symbol, ie. with the
7559 thread pointer REG operand removed. Otherwise return 0. */
7560
7561 unsigned int
7562 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7563 {
7564 if ((insn & (0x1f << 16)) == reg << 16
7565 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7566 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7567 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7568 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7569 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7570 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7571 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7572 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7573 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7574 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7575 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7576 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7577 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7578 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7579 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7580 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7581 && (insn & 3) != 1)
7582 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7583 && ((insn & 3) == 0 || (insn & 3) == 3))))
7584 {
7585 insn &= ~(0x1f << 16);
7586 }
7587 else if ((insn & (0x1f << 21)) == reg << 21
7588 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7589 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7590 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7591 {
7592 insn &= ~(0x1f << 21);
7593 insn |= (insn & (0x1f << 16)) << 5;
7594 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7595 insn -= 2 >> 26; /* convert to ori,oris */
7596 }
7597 else
7598 insn = 0;
7599 return insn;
7600 }
7601
7602 static bfd_boolean
7603 is_insn_ds_form (unsigned int insn)
7604 {
7605 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7606 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7607 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7608 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7609 }
7610
7611 static bfd_boolean
7612 is_insn_dq_form (unsigned int insn)
7613 {
7614 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7615 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7616 && (insn & 3) == 1));
7617 }
7618
7619 /* The RELOCATE_SECTION function is called by the ELF backend linker
7620 to handle the relocations for a section.
7621
7622 The relocs are always passed as Rela structures; if the section
7623 actually uses Rel structures, the r_addend field will always be
7624 zero.
7625
7626 This function is responsible for adjust the section contents as
7627 necessary, and (if using Rela relocs and generating a
7628 relocatable output file) adjusting the reloc addend as
7629 necessary.
7630
7631 This function does not have to worry about setting the reloc
7632 address or the reloc symbol index.
7633
7634 LOCAL_SYMS is a pointer to the swapped in local symbols.
7635
7636 LOCAL_SECTIONS is an array giving the section in the input file
7637 corresponding to the st_shndx field of each local symbol.
7638
7639 The global hash table entry for the global symbols can be found
7640 via elf_sym_hashes (input_bfd).
7641
7642 When generating relocatable output, this function must handle
7643 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7644 going to be the section symbol corresponding to the output
7645 section, which means that the addend must be adjusted
7646 accordingly. */
7647
7648 static bfd_boolean
7649 ppc_elf_relocate_section (bfd *output_bfd,
7650 struct bfd_link_info *info,
7651 bfd *input_bfd,
7652 asection *input_section,
7653 bfd_byte *contents,
7654 Elf_Internal_Rela *relocs,
7655 Elf_Internal_Sym *local_syms,
7656 asection **local_sections)
7657 {
7658 Elf_Internal_Shdr *symtab_hdr;
7659 struct elf_link_hash_entry **sym_hashes;
7660 struct ppc_elf_link_hash_table *htab;
7661 Elf_Internal_Rela *rel;
7662 Elf_Internal_Rela *wrel;
7663 Elf_Internal_Rela *relend;
7664 Elf_Internal_Rela outrel;
7665 asection *got2;
7666 bfd_vma *local_got_offsets;
7667 bfd_boolean ret = TRUE;
7668 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7669 bfd_boolean is_vxworks_tls;
7670 unsigned int picfixup_size = 0;
7671 struct ppc_elf_relax_info *relax_info = NULL;
7672
7673 #ifdef DEBUG
7674 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7675 "%ld relocations%s",
7676 input_bfd, input_section,
7677 (long) input_section->reloc_count,
7678 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7679 #endif
7680
7681 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7682
7683 /* Initialize howto table if not already done. */
7684 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7685 ppc_elf_howto_init ();
7686
7687 htab = ppc_elf_hash_table (info);
7688 local_got_offsets = elf_local_got_offsets (input_bfd);
7689 symtab_hdr = &elf_symtab_hdr (input_bfd);
7690 sym_hashes = elf_sym_hashes (input_bfd);
7691 /* We have to handle relocations in vxworks .tls_vars sections
7692 specially, because the dynamic loader is 'weird'. */
7693 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7694 && !strcmp (input_section->output_section->name,
7695 ".tls_vars"));
7696 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7697 relax_info = elf_section_data (input_section)->sec_info;
7698 rel = wrel = relocs;
7699 relend = relocs + input_section->reloc_count;
7700 for (; rel < relend; wrel++, rel++)
7701 {
7702 enum elf_ppc_reloc_type r_type;
7703 bfd_vma addend;
7704 bfd_reloc_status_type r;
7705 Elf_Internal_Sym *sym;
7706 asection *sec;
7707 struct elf_link_hash_entry *h;
7708 const char *sym_name;
7709 reloc_howto_type *howto;
7710 unsigned long r_symndx;
7711 bfd_vma relocation;
7712 bfd_vma branch_bit, from;
7713 bfd_boolean unresolved_reloc;
7714 bfd_boolean warned;
7715 unsigned int tls_type, tls_mask, tls_gd;
7716 struct plt_entry **ifunc;
7717 struct reloc_howto_struct alt_howto;
7718
7719 again:
7720 r_type = ELF32_R_TYPE (rel->r_info);
7721 sym = NULL;
7722 sec = NULL;
7723 h = NULL;
7724 unresolved_reloc = FALSE;
7725 warned = FALSE;
7726 r_symndx = ELF32_R_SYM (rel->r_info);
7727
7728 if (r_symndx < symtab_hdr->sh_info)
7729 {
7730 sym = local_syms + r_symndx;
7731 sec = local_sections[r_symndx];
7732 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7733
7734 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7735 }
7736 else
7737 {
7738 bfd_boolean ignored;
7739
7740 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7741 r_symndx, symtab_hdr, sym_hashes,
7742 h, sec, relocation,
7743 unresolved_reloc, warned, ignored);
7744
7745 sym_name = h->root.root.string;
7746 }
7747
7748 if (sec != NULL && discarded_section (sec))
7749 {
7750 /* For relocs against symbols from removed linkonce sections,
7751 or sections discarded by a linker script, we just want the
7752 section contents zeroed. Avoid any special processing. */
7753 howto = NULL;
7754 if (r_type < R_PPC_max)
7755 howto = ppc_elf_howto_table[r_type];
7756
7757 _bfd_clear_contents (howto, input_bfd, input_section,
7758 contents + rel->r_offset);
7759 wrel->r_offset = rel->r_offset;
7760 wrel->r_info = 0;
7761 wrel->r_addend = 0;
7762
7763 /* For ld -r, remove relocations in debug sections against
7764 symbols defined in discarded sections. Not done for
7765 non-debug to preserve relocs in .eh_frame which the
7766 eh_frame editing code expects to be present. */
7767 if (bfd_link_relocatable (info)
7768 && (input_section->flags & SEC_DEBUGGING))
7769 wrel--;
7770
7771 continue;
7772 }
7773
7774 if (bfd_link_relocatable (info))
7775 {
7776 if (got2 != NULL
7777 && r_type == R_PPC_PLTREL24
7778 && rel->r_addend != 0)
7779 {
7780 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7781 addend specifies the GOT pointer offset within .got2. */
7782 rel->r_addend += got2->output_offset;
7783 }
7784 if (r_type != R_PPC_RELAX_PLT
7785 && r_type != R_PPC_RELAX_PLTREL24
7786 && r_type != R_PPC_RELAX)
7787 goto copy_reloc;
7788 }
7789
7790 /* TLS optimizations. Replace instruction sequences and relocs
7791 based on information we collected in tls_optimize. We edit
7792 RELOCS so that --emit-relocs will output something sensible
7793 for the final instruction stream. */
7794 tls_mask = 0;
7795 tls_gd = 0;
7796 if (h != NULL)
7797 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7798 else if (local_got_offsets != NULL)
7799 {
7800 struct plt_entry **local_plt;
7801 char *lgot_masks;
7802 local_plt
7803 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7804 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7805 tls_mask = lgot_masks[r_symndx];
7806 }
7807
7808 /* Ensure reloc mapping code below stays sane. */
7809 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7810 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7811 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7812 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7813 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7814 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7815 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7816 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7817 abort ();
7818 switch (r_type)
7819 {
7820 default:
7821 break;
7822
7823 case R_PPC_GOT_TPREL16:
7824 case R_PPC_GOT_TPREL16_LO:
7825 if ((tls_mask & TLS_TLS) != 0
7826 && (tls_mask & TLS_TPREL) == 0)
7827 {
7828 bfd_vma insn;
7829
7830 insn = bfd_get_32 (input_bfd,
7831 contents + rel->r_offset - d_offset);
7832 insn &= 31 << 21;
7833 insn |= 0x3c020000; /* addis 0,2,0 */
7834 bfd_put_32 (input_bfd, insn,
7835 contents + rel->r_offset - d_offset);
7836 r_type = R_PPC_TPREL16_HA;
7837 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7838 }
7839 break;
7840
7841 case R_PPC_TLS:
7842 if ((tls_mask & TLS_TLS) != 0
7843 && (tls_mask & TLS_TPREL) == 0)
7844 {
7845 bfd_vma insn;
7846
7847 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7848 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7849 if (insn == 0)
7850 abort ();
7851 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7852 r_type = R_PPC_TPREL16_LO;
7853 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7854
7855 /* Was PPC_TLS which sits on insn boundary, now
7856 PPC_TPREL16_LO which is at low-order half-word. */
7857 rel->r_offset += d_offset;
7858 }
7859 break;
7860
7861 case R_PPC_GOT_TLSGD16_HI:
7862 case R_PPC_GOT_TLSGD16_HA:
7863 tls_gd = TLS_TPRELGD;
7864 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7865 goto tls_gdld_hi;
7866 break;
7867
7868 case R_PPC_GOT_TLSLD16_HI:
7869 case R_PPC_GOT_TLSLD16_HA:
7870 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7871 {
7872 tls_gdld_hi:
7873 if ((tls_mask & tls_gd) != 0)
7874 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7875 + R_PPC_GOT_TPREL16);
7876 else
7877 {
7878 rel->r_offset -= d_offset;
7879 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7880 r_type = R_PPC_NONE;
7881 }
7882 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7883 }
7884 break;
7885
7886 case R_PPC_GOT_TLSGD16:
7887 case R_PPC_GOT_TLSGD16_LO:
7888 tls_gd = TLS_TPRELGD;
7889 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7890 goto tls_ldgd_opt;
7891 break;
7892
7893 case R_PPC_GOT_TLSLD16:
7894 case R_PPC_GOT_TLSLD16_LO:
7895 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7896 {
7897 unsigned int insn1, insn2;
7898 bfd_vma offset;
7899
7900 tls_ldgd_opt:
7901 offset = (bfd_vma) -1;
7902 /* If not using the newer R_PPC_TLSGD/LD to mark
7903 __tls_get_addr calls, we must trust that the call
7904 stays with its arg setup insns, ie. that the next
7905 reloc is the __tls_get_addr call associated with
7906 the current reloc. Edit both insns. */
7907 if (input_section->has_tls_get_addr_call
7908 && rel + 1 < relend
7909 && branch_reloc_hash_match (input_bfd, rel + 1,
7910 htab->tls_get_addr))
7911 offset = rel[1].r_offset;
7912 /* We read the low GOT_TLS insn because we need to keep
7913 the destination reg. It may be something other than
7914 the usual r3, and moved to r3 before the call by
7915 intervening code. */
7916 insn1 = bfd_get_32 (input_bfd,
7917 contents + rel->r_offset - d_offset);
7918 if ((tls_mask & tls_gd) != 0)
7919 {
7920 /* IE */
7921 insn1 &= (0x1f << 21) | (0x1f << 16);
7922 insn1 |= 32 << 26; /* lwz */
7923 if (offset != (bfd_vma) -1)
7924 {
7925 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7926 insn2 = 0x7c631214; /* add 3,3,2 */
7927 bfd_put_32 (input_bfd, insn2, contents + offset);
7928 }
7929 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7930 + R_PPC_GOT_TPREL16);
7931 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7932 }
7933 else
7934 {
7935 /* LE */
7936 insn1 &= 0x1f << 21;
7937 insn1 |= 0x3c020000; /* addis r,2,0 */
7938 if (tls_gd == 0)
7939 {
7940 /* Was an LD reloc. */
7941 for (r_symndx = 0;
7942 r_symndx < symtab_hdr->sh_info;
7943 r_symndx++)
7944 if (local_sections[r_symndx] == sec)
7945 break;
7946 if (r_symndx >= symtab_hdr->sh_info)
7947 r_symndx = STN_UNDEF;
7948 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7949 if (r_symndx != STN_UNDEF)
7950 rel->r_addend -= (local_syms[r_symndx].st_value
7951 + sec->output_offset
7952 + sec->output_section->vma);
7953 }
7954 r_type = R_PPC_TPREL16_HA;
7955 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7956 if (offset != (bfd_vma) -1)
7957 {
7958 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7959 rel[1].r_offset = offset + d_offset;
7960 rel[1].r_addend = rel->r_addend;
7961 insn2 = 0x38630000; /* addi 3,3,0 */
7962 bfd_put_32 (input_bfd, insn2, contents + offset);
7963 }
7964 }
7965 bfd_put_32 (input_bfd, insn1,
7966 contents + rel->r_offset - d_offset);
7967 if (tls_gd == 0)
7968 {
7969 /* We changed the symbol on an LD reloc. Start over
7970 in order to get h, sym, sec etc. right. */
7971 goto again;
7972 }
7973 }
7974 break;
7975
7976 case R_PPC_TLSGD:
7977 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7978 {
7979 unsigned int insn2;
7980 bfd_vma offset = rel->r_offset;
7981
7982 if ((tls_mask & TLS_TPRELGD) != 0)
7983 {
7984 /* IE */
7985 r_type = R_PPC_NONE;
7986 insn2 = 0x7c631214; /* add 3,3,2 */
7987 }
7988 else
7989 {
7990 /* LE */
7991 r_type = R_PPC_TPREL16_LO;
7992 rel->r_offset += d_offset;
7993 insn2 = 0x38630000; /* addi 3,3,0 */
7994 }
7995 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7996 bfd_put_32 (input_bfd, insn2, contents + offset);
7997 /* Zap the reloc on the _tls_get_addr call too. */
7998 BFD_ASSERT (offset == rel[1].r_offset);
7999 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8000 }
8001 break;
8002
8003 case R_PPC_TLSLD:
8004 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8005 {
8006 unsigned int insn2;
8007
8008 for (r_symndx = 0;
8009 r_symndx < symtab_hdr->sh_info;
8010 r_symndx++)
8011 if (local_sections[r_symndx] == sec)
8012 break;
8013 if (r_symndx >= symtab_hdr->sh_info)
8014 r_symndx = STN_UNDEF;
8015 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8016 if (r_symndx != STN_UNDEF)
8017 rel->r_addend -= (local_syms[r_symndx].st_value
8018 + sec->output_offset
8019 + sec->output_section->vma);
8020
8021 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8022 rel->r_offset += d_offset;
8023 insn2 = 0x38630000; /* addi 3,3,0 */
8024 bfd_put_32 (input_bfd, insn2,
8025 contents + rel->r_offset - d_offset);
8026 /* Zap the reloc on the _tls_get_addr call too. */
8027 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8028 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8029 goto again;
8030 }
8031 break;
8032 }
8033
8034 /* Handle other relocations that tweak non-addend part of insn. */
8035 branch_bit = 0;
8036 switch (r_type)
8037 {
8038 default:
8039 break;
8040
8041 /* Branch taken prediction relocations. */
8042 case R_PPC_ADDR14_BRTAKEN:
8043 case R_PPC_REL14_BRTAKEN:
8044 branch_bit = BRANCH_PREDICT_BIT;
8045 /* Fall through. */
8046
8047 /* Branch not taken prediction relocations. */
8048 case R_PPC_ADDR14_BRNTAKEN:
8049 case R_PPC_REL14_BRNTAKEN:
8050 {
8051 bfd_vma insn;
8052
8053 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8054 insn &= ~BRANCH_PREDICT_BIT;
8055 insn |= branch_bit;
8056
8057 from = (rel->r_offset
8058 + input_section->output_offset
8059 + input_section->output_section->vma);
8060
8061 /* Invert 'y' bit if not the default. */
8062 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8063 insn ^= BRANCH_PREDICT_BIT;
8064
8065 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8066 break;
8067 }
8068 }
8069
8070 if (ELIMINATE_COPY_RELOCS
8071 && h != NULL
8072 && !h->def_regular
8073 && h->protected_def
8074 && ppc_elf_hash_entry (h)->has_addr16_ha
8075 && ppc_elf_hash_entry (h)->has_addr16_lo
8076 && htab->params->pic_fixup > 0)
8077 {
8078 /* Convert lis;addi or lis;load/store accessing a protected
8079 variable defined in a shared library to PIC. */
8080 unsigned int insn;
8081
8082 if (r_type == R_PPC_ADDR16_HA)
8083 {
8084 insn = bfd_get_32 (input_bfd,
8085 contents + rel->r_offset - d_offset);
8086 if ((insn & (0x3f << 26)) == (15u << 26)
8087 && (insn & (0x1f << 16)) == 0 /* lis */)
8088 {
8089 bfd_byte *p;
8090 bfd_vma off;
8091 bfd_vma got_addr;
8092
8093 p = (contents + input_section->size
8094 - relax_info->workaround_size
8095 - relax_info->picfixup_size
8096 + picfixup_size);
8097 off = (p - contents) - (rel->r_offset - d_offset);
8098 if (off > 0x1fffffc || (off & 3) != 0)
8099 info->callbacks->einfo
8100 (_("%H: fixup branch overflow\n"),
8101 input_bfd, input_section, rel->r_offset);
8102
8103 bfd_put_32 (input_bfd, B | off,
8104 contents + rel->r_offset - d_offset);
8105 got_addr = (htab->elf.sgot->output_section->vma
8106 + htab->elf.sgot->output_offset
8107 + (h->got.offset & ~1));
8108 wrel->r_offset = (p - contents) + d_offset;
8109 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8110 wrel->r_addend = got_addr;
8111 insn &= ~0xffff;
8112 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8113 bfd_put_32 (input_bfd, insn, p);
8114
8115 /* Convert lis to lwz, loading address from GOT. */
8116 insn &= ~0xffff;
8117 insn ^= (32u ^ 15u) << 26;
8118 insn |= (insn & (0x1f << 21)) >> 5;
8119 insn |= got_addr & 0xffff;
8120 bfd_put_32 (input_bfd, insn, p + 4);
8121
8122 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8123 picfixup_size += 12;
8124
8125 /* Use one of the spare relocs, so --emit-relocs
8126 output is reasonable. */
8127 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8128 wrel++, rel++;
8129 rel->r_offset = wrel[-1].r_offset + 4;
8130 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8131 rel->r_addend = wrel[-1].r_addend;
8132
8133 /* Continue on as if we had a got reloc, to output
8134 dynamic reloc. */
8135 r_type = R_PPC_GOT16_LO;
8136 }
8137 else
8138 _bfd_error_handler
8139 /* xgettext:c-format */
8140 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8141 input_bfd, input_section, rel->r_offset,
8142 "R_PPC_ADDR16_HA", insn);
8143 }
8144 else if (r_type == R_PPC_ADDR16_LO)
8145 {
8146 insn = bfd_get_32 (input_bfd,
8147 contents + rel->r_offset - d_offset);
8148 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8149 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8150 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8151 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8152 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8153 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8154 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8155 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8156 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8157 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8158 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8159 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8160 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8161 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8162 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8163 && (insn & 3) != 1)
8164 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8165 && ((insn & 3) == 0 || (insn & 3) == 3)))
8166 {
8167 /* Arrange to apply the reloc addend, if any. */
8168 relocation = 0;
8169 unresolved_reloc = FALSE;
8170 rel->r_info = ELF32_R_INFO (0, r_type);
8171 }
8172 else
8173 _bfd_error_handler
8174 /* xgettext:c-format */
8175 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8176 input_bfd, input_section, rel->r_offset,
8177 "R_PPC_ADDR16_LO", insn);
8178 }
8179 }
8180
8181 ifunc = NULL;
8182 if (!htab->is_vxworks)
8183 {
8184 struct plt_entry *ent;
8185
8186 if (h != NULL)
8187 {
8188 if (h->type == STT_GNU_IFUNC)
8189 ifunc = &h->plt.plist;
8190 }
8191 else if (local_got_offsets != NULL
8192 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8193 {
8194 struct plt_entry **local_plt;
8195
8196 local_plt = (struct plt_entry **) (local_got_offsets
8197 + symtab_hdr->sh_info);
8198 ifunc = local_plt + r_symndx;
8199 }
8200
8201 ent = NULL;
8202 if (ifunc != NULL
8203 && (!bfd_link_pic (info)
8204 || is_branch_reloc (r_type)))
8205 {
8206 addend = 0;
8207 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8208 addend = rel->r_addend;
8209 ent = find_plt_ent (ifunc, got2, addend);
8210 }
8211 if (ent != NULL)
8212 {
8213 if (bfd_link_pic (info)
8214 && ent->sec != got2
8215 && htab->plt_type != PLT_NEW
8216 && (!htab->elf.dynamic_sections_created
8217 || h == NULL
8218 || h->dynindx == -1))
8219 {
8220 /* Uh oh, we are going to create a pic glink stub
8221 for an ifunc (here for h == NULL and later in
8222 finish_dynamic_symbol for h != NULL), and
8223 apparently are using code compiled with
8224 -mbss-plt. The difficulty is that -mbss-plt code
8225 gives no indication via a magic PLTREL24 addend
8226 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8227 is pointing into a .got2 section (and how far
8228 into .got2). */
8229 info->callbacks->einfo
8230 /* xgettext:c-format */
8231 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8232 input_bfd, input_section, rel->r_offset, sym_name);
8233 }
8234 if (h == NULL && (ent->plt.offset & 1) == 0)
8235 {
8236 Elf_Internal_Rela rela;
8237 bfd_byte *loc;
8238
8239 rela.r_offset = (htab->elf.iplt->output_section->vma
8240 + htab->elf.iplt->output_offset
8241 + ent->plt.offset);
8242 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8243 rela.r_addend = relocation;
8244 loc = htab->elf.irelplt->contents;
8245 loc += (htab->elf.irelplt->reloc_count++
8246 * sizeof (Elf32_External_Rela));
8247 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8248 htab->local_ifunc_resolver = 1;
8249
8250 ent->plt.offset |= 1;
8251 }
8252 if (h == NULL && (ent->glink_offset & 1) == 0)
8253 {
8254 unsigned char *p = ((unsigned char *) htab->glink->contents
8255 + ent->glink_offset);
8256 write_glink_stub (ent, htab->elf.iplt, p, info);
8257 ent->glink_offset |= 1;
8258 }
8259
8260 unresolved_reloc = FALSE;
8261 if (htab->plt_type == PLT_NEW
8262 || !htab->elf.dynamic_sections_created
8263 || h == NULL
8264 || h->dynindx == -1)
8265 relocation = (htab->glink->output_section->vma
8266 + htab->glink->output_offset
8267 + (ent->glink_offset & ~1));
8268 else
8269 relocation = (htab->elf.splt->output_section->vma
8270 + htab->elf.splt->output_offset
8271 + ent->plt.offset);
8272 }
8273 }
8274
8275 addend = rel->r_addend;
8276 howto = NULL;
8277 if (r_type < R_PPC_max)
8278 howto = ppc_elf_howto_table[r_type];
8279
8280 switch (r_type)
8281 {
8282 default:
8283 break;
8284
8285 case R_PPC_TPREL16_HA:
8286 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8287 {
8288 bfd_byte *p = contents + (rel->r_offset & ~3);
8289 unsigned int insn = bfd_get_32 (input_bfd, p);
8290 if ((insn & ((0x3f << 26) | 0x1f << 16))
8291 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8292 /* xgettext:c-format */
8293 info->callbacks->minfo
8294 (_("%H: warning: %s unexpected insn %#x.\n"),
8295 input_bfd, input_section, rel->r_offset, howto->name, insn);
8296 else
8297 bfd_put_32 (input_bfd, NOP, p);
8298 }
8299 break;
8300
8301 case R_PPC_TPREL16_LO:
8302 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8303 {
8304 bfd_byte *p = contents + (rel->r_offset & ~3);
8305 unsigned int insn = bfd_get_32 (input_bfd, p);
8306 insn &= ~(0x1f << 16);
8307 insn |= 2 << 16;
8308 bfd_put_32 (input_bfd, insn, p);
8309 }
8310 break;
8311 }
8312
8313 tls_type = 0;
8314 switch (r_type)
8315 {
8316 default:
8317 info->callbacks->einfo
8318 /* xgettext:c-format */
8319 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8320 input_bfd, (int) r_type, sym_name);
8321
8322 bfd_set_error (bfd_error_bad_value);
8323 ret = FALSE;
8324 goto copy_reloc;
8325
8326 case R_PPC_NONE:
8327 case R_PPC_TLS:
8328 case R_PPC_TLSGD:
8329 case R_PPC_TLSLD:
8330 case R_PPC_EMB_MRKREF:
8331 case R_PPC_GNU_VTINHERIT:
8332 case R_PPC_GNU_VTENTRY:
8333 goto copy_reloc;
8334
8335 /* GOT16 relocations. Like an ADDR16 using the symbol's
8336 address in the GOT as relocation value instead of the
8337 symbol's value itself. Also, create a GOT entry for the
8338 symbol and put the symbol value there. */
8339 case R_PPC_GOT_TLSGD16:
8340 case R_PPC_GOT_TLSGD16_LO:
8341 case R_PPC_GOT_TLSGD16_HI:
8342 case R_PPC_GOT_TLSGD16_HA:
8343 tls_type = TLS_TLS | TLS_GD;
8344 goto dogot;
8345
8346 case R_PPC_GOT_TLSLD16:
8347 case R_PPC_GOT_TLSLD16_LO:
8348 case R_PPC_GOT_TLSLD16_HI:
8349 case R_PPC_GOT_TLSLD16_HA:
8350 tls_type = TLS_TLS | TLS_LD;
8351 goto dogot;
8352
8353 case R_PPC_GOT_TPREL16:
8354 case R_PPC_GOT_TPREL16_LO:
8355 case R_PPC_GOT_TPREL16_HI:
8356 case R_PPC_GOT_TPREL16_HA:
8357 tls_type = TLS_TLS | TLS_TPREL;
8358 goto dogot;
8359
8360 case R_PPC_GOT_DTPREL16:
8361 case R_PPC_GOT_DTPREL16_LO:
8362 case R_PPC_GOT_DTPREL16_HI:
8363 case R_PPC_GOT_DTPREL16_HA:
8364 tls_type = TLS_TLS | TLS_DTPREL;
8365 goto dogot;
8366
8367 case R_PPC_GOT16:
8368 case R_PPC_GOT16_LO:
8369 case R_PPC_GOT16_HI:
8370 case R_PPC_GOT16_HA:
8371 tls_mask = 0;
8372 dogot:
8373 {
8374 /* Relocation is to the entry for this symbol in the global
8375 offset table. */
8376 bfd_vma off;
8377 bfd_vma *offp;
8378 unsigned long indx;
8379
8380 if (htab->elf.sgot == NULL)
8381 abort ();
8382
8383 indx = 0;
8384 if (tls_type == (TLS_TLS | TLS_LD)
8385 && (h == NULL
8386 || !h->def_dynamic))
8387 offp = &htab->tlsld_got.offset;
8388 else if (h != NULL)
8389 {
8390 if (!htab->elf.dynamic_sections_created
8391 || h->dynindx == -1
8392 || SYMBOL_REFERENCES_LOCAL (info, h)
8393 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8394 /* This is actually a static link, or it is a
8395 -Bsymbolic link and the symbol is defined
8396 locally, or the symbol was forced to be local
8397 because of a version file. */
8398 ;
8399 else
8400 {
8401 indx = h->dynindx;
8402 unresolved_reloc = FALSE;
8403 }
8404 offp = &h->got.offset;
8405 }
8406 else
8407 {
8408 if (local_got_offsets == NULL)
8409 abort ();
8410 offp = &local_got_offsets[r_symndx];
8411 }
8412
8413 /* The offset must always be a multiple of 4. We use the
8414 least significant bit to record whether we have already
8415 processed this entry. */
8416 off = *offp;
8417 if ((off & 1) != 0)
8418 off &= ~1;
8419 else
8420 {
8421 unsigned int tls_m = (tls_mask
8422 & (TLS_LD | TLS_GD | TLS_DTPREL
8423 | TLS_TPREL | TLS_TPRELGD));
8424
8425 if (offp == &htab->tlsld_got.offset)
8426 tls_m = TLS_LD;
8427 else if (h == NULL
8428 || !h->def_dynamic)
8429 tls_m &= ~TLS_LD;
8430
8431 /* We might have multiple got entries for this sym.
8432 Initialize them all. */
8433 do
8434 {
8435 int tls_ty = 0;
8436
8437 if ((tls_m & TLS_LD) != 0)
8438 {
8439 tls_ty = TLS_TLS | TLS_LD;
8440 tls_m &= ~TLS_LD;
8441 }
8442 else if ((tls_m & TLS_GD) != 0)
8443 {
8444 tls_ty = TLS_TLS | TLS_GD;
8445 tls_m &= ~TLS_GD;
8446 }
8447 else if ((tls_m & TLS_DTPREL) != 0)
8448 {
8449 tls_ty = TLS_TLS | TLS_DTPREL;
8450 tls_m &= ~TLS_DTPREL;
8451 }
8452 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8453 {
8454 tls_ty = TLS_TLS | TLS_TPREL;
8455 tls_m = 0;
8456 }
8457
8458 /* Generate relocs for the dynamic linker. */
8459 if (indx != 0
8460 || (bfd_link_pic (info)
8461 && (h == NULL
8462 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8463 || offp == &htab->tlsld_got.offset)
8464 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8465 && bfd_link_executable (info)
8466 && SYMBOL_REFERENCES_LOCAL (info, h))))
8467 {
8468 asection *rsec = htab->elf.srelgot;
8469 bfd_byte * loc;
8470
8471 if (ifunc != NULL)
8472 {
8473 rsec = htab->elf.irelplt;
8474 if (indx == 0)
8475 htab->local_ifunc_resolver = 1;
8476 else if (is_static_defined (h))
8477 htab->maybe_local_ifunc_resolver = 1;
8478 }
8479 outrel.r_offset = (htab->elf.sgot->output_section->vma
8480 + htab->elf.sgot->output_offset
8481 + off);
8482 outrel.r_addend = 0;
8483 if (tls_ty & (TLS_LD | TLS_GD))
8484 {
8485 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8486 if (tls_ty == (TLS_TLS | TLS_GD))
8487 {
8488 loc = rsec->contents;
8489 loc += (rsec->reloc_count++
8490 * sizeof (Elf32_External_Rela));
8491 bfd_elf32_swap_reloca_out (output_bfd,
8492 &outrel, loc);
8493 outrel.r_offset += 4;
8494 outrel.r_info
8495 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8496 }
8497 }
8498 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8499 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8500 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8501 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8502 else if (indx != 0)
8503 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8504 else if (ifunc != NULL)
8505 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8506 else
8507 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8508 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8509 {
8510 outrel.r_addend += relocation;
8511 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8512 {
8513 if (htab->elf.tls_sec == NULL)
8514 outrel.r_addend = 0;
8515 else
8516 outrel.r_addend -= htab->elf.tls_sec->vma;
8517 }
8518 }
8519 loc = rsec->contents;
8520 loc += (rsec->reloc_count++
8521 * sizeof (Elf32_External_Rela));
8522 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8523 }
8524
8525 /* Init the .got section contents if we're not
8526 emitting a reloc. */
8527 else
8528 {
8529 bfd_vma value = relocation;
8530
8531 if (tls_ty != 0)
8532 {
8533 if (htab->elf.tls_sec == NULL)
8534 value = 0;
8535 else
8536 {
8537 if (tls_ty & TLS_LD)
8538 value = 0;
8539 else
8540 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8541 if (tls_ty & TLS_TPREL)
8542 value += DTP_OFFSET - TP_OFFSET;
8543 }
8544
8545 if (tls_ty & (TLS_LD | TLS_GD))
8546 {
8547 bfd_put_32 (input_bfd, value,
8548 htab->elf.sgot->contents + off + 4);
8549 value = 1;
8550 }
8551 }
8552 bfd_put_32 (input_bfd, value,
8553 htab->elf.sgot->contents + off);
8554 }
8555
8556 off += 4;
8557 if (tls_ty & (TLS_LD | TLS_GD))
8558 off += 4;
8559 }
8560 while (tls_m != 0);
8561
8562 off = *offp;
8563 *offp = off | 1;
8564 }
8565
8566 if (off >= (bfd_vma) -2)
8567 abort ();
8568
8569 if ((tls_type & TLS_TLS) != 0)
8570 {
8571 if (tls_type != (TLS_TLS | TLS_LD))
8572 {
8573 if ((tls_mask & TLS_LD) != 0
8574 && !(h == NULL
8575 || !h->def_dynamic))
8576 off += 8;
8577 if (tls_type != (TLS_TLS | TLS_GD))
8578 {
8579 if ((tls_mask & TLS_GD) != 0)
8580 off += 8;
8581 if (tls_type != (TLS_TLS | TLS_DTPREL))
8582 {
8583 if ((tls_mask & TLS_DTPREL) != 0)
8584 off += 4;
8585 }
8586 }
8587 }
8588 }
8589
8590 /* If here for a picfixup, we're done. */
8591 if (r_type != ELF32_R_TYPE (rel->r_info))
8592 goto copy_reloc;
8593
8594 relocation = (htab->elf.sgot->output_section->vma
8595 + htab->elf.sgot->output_offset
8596 + off
8597 - SYM_VAL (htab->elf.hgot));
8598
8599 /* Addends on got relocations don't make much sense.
8600 x+off@got is actually x@got+off, and since the got is
8601 generated by a hash table traversal, the value in the
8602 got at entry m+n bears little relation to the entry m. */
8603 if (addend != 0)
8604 info->callbacks->einfo
8605 /* xgettext:c-format */
8606 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8607 input_bfd, input_section, rel->r_offset,
8608 howto->name,
8609 sym_name);
8610 }
8611 break;
8612
8613 /* Relocations that need no special processing. */
8614 case R_PPC_LOCAL24PC:
8615 /* It makes no sense to point a local relocation
8616 at a symbol not in this object. */
8617 if (unresolved_reloc)
8618 {
8619 (*info->callbacks->undefined_symbol) (info,
8620 h->root.root.string,
8621 input_bfd,
8622 input_section,
8623 rel->r_offset,
8624 TRUE);
8625 goto copy_reloc;
8626 }
8627 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8628 {
8629 /* @local on an ifunc does not really make sense since
8630 the ifunc resolver can take you anywhere. More
8631 seriously, calls to ifuncs must go through a plt call
8632 stub, and for pic the plt call stubs uses r30 to
8633 access the PLT. The problem is that a call that is
8634 local won't have the +32k reloc addend trick marking
8635 -fPIC code, so the linker won't know whether r30 is
8636 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8637 /* xgettext:c-format */
8638 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8639 input_bfd, input_section, rel->r_offset,
8640 h->root.root.string);
8641 }
8642 break;
8643
8644 case R_PPC_DTPREL16:
8645 case R_PPC_DTPREL16_LO:
8646 case R_PPC_DTPREL16_HI:
8647 case R_PPC_DTPREL16_HA:
8648 if (htab->elf.tls_sec != NULL)
8649 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8650 break;
8651
8652 /* Relocations that may need to be propagated if this is a shared
8653 object. */
8654 case R_PPC_TPREL16:
8655 case R_PPC_TPREL16_LO:
8656 case R_PPC_TPREL16_HI:
8657 case R_PPC_TPREL16_HA:
8658 if (h != NULL
8659 && h->root.type == bfd_link_hash_undefweak
8660 && h->dynindx == -1)
8661 {
8662 /* Make this relocation against an undefined weak symbol
8663 resolve to zero. This is really just a tweak, since
8664 code using weak externs ought to check that they are
8665 defined before using them. */
8666 bfd_byte *p = contents + rel->r_offset - d_offset;
8667 unsigned int insn = bfd_get_32 (input_bfd, p);
8668 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8669 if (insn != 0)
8670 bfd_put_32 (input_bfd, insn, p);
8671 break;
8672 }
8673 if (htab->elf.tls_sec != NULL)
8674 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8675 /* The TPREL16 relocs shouldn't really be used in shared
8676 libs or with non-local symbols as that will result in
8677 DT_TEXTREL being set, but support them anyway. */
8678 goto dodyn;
8679
8680 case R_PPC_TPREL32:
8681 if (htab->elf.tls_sec != NULL)
8682 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8683 goto dodyn;
8684
8685 case R_PPC_DTPREL32:
8686 if (htab->elf.tls_sec != NULL)
8687 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8688 goto dodyn;
8689
8690 case R_PPC_DTPMOD32:
8691 relocation = 1;
8692 addend = 0;
8693 goto dodyn;
8694
8695 case R_PPC_REL16:
8696 case R_PPC_REL16_LO:
8697 case R_PPC_REL16_HI:
8698 case R_PPC_REL16_HA:
8699 case R_PPC_REL16DX_HA:
8700 break;
8701
8702 case R_PPC_REL32:
8703 if (h == NULL || h == htab->elf.hgot)
8704 break;
8705 /* fall through */
8706
8707 case R_PPC_ADDR32:
8708 case R_PPC_ADDR16:
8709 case R_PPC_ADDR16_LO:
8710 case R_PPC_ADDR16_HI:
8711 case R_PPC_ADDR16_HA:
8712 case R_PPC_UADDR32:
8713 case R_PPC_UADDR16:
8714 goto dodyn;
8715
8716 case R_PPC_VLE_REL8:
8717 case R_PPC_VLE_REL15:
8718 case R_PPC_VLE_REL24:
8719 case R_PPC_REL24:
8720 case R_PPC_REL14:
8721 case R_PPC_REL14_BRTAKEN:
8722 case R_PPC_REL14_BRNTAKEN:
8723 /* If these relocations are not to a named symbol, they can be
8724 handled right here, no need to bother the dynamic linker. */
8725 if (SYMBOL_CALLS_LOCAL (info, h)
8726 || h == htab->elf.hgot)
8727 break;
8728 /* fall through */
8729
8730 case R_PPC_ADDR24:
8731 case R_PPC_ADDR14:
8732 case R_PPC_ADDR14_BRTAKEN:
8733 case R_PPC_ADDR14_BRNTAKEN:
8734 if (h != NULL && !bfd_link_pic (info))
8735 break;
8736 /* fall through */
8737
8738 dodyn:
8739 if ((input_section->flags & SEC_ALLOC) == 0
8740 || is_vxworks_tls)
8741 break;
8742
8743 if (bfd_link_pic (info)
8744 ? ((h == NULL
8745 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8746 && ((h != NULL && pc_dynrelocs (h))
8747 || must_be_dyn_reloc (info, r_type)))
8748 : (h != NULL
8749 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8750 {
8751 int skip;
8752 bfd_byte *loc;
8753 asection *sreloc;
8754 long indx = 0;
8755
8756 #ifdef DEBUG
8757 fprintf (stderr, "ppc_elf_relocate_section needs to "
8758 "create relocation for %s\n",
8759 (h && h->root.root.string
8760 ? h->root.root.string : "<unknown>"));
8761 #endif
8762
8763 /* When generating a shared object, these relocations
8764 are copied into the output file to be resolved at run
8765 time. */
8766 skip = 0;
8767 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8768 input_section,
8769 rel->r_offset);
8770 if (outrel.r_offset == (bfd_vma) -1
8771 || outrel.r_offset == (bfd_vma) -2)
8772 skip = (int) outrel.r_offset;
8773 outrel.r_offset += (input_section->output_section->vma
8774 + input_section->output_offset);
8775
8776 if (skip)
8777 memset (&outrel, 0, sizeof outrel);
8778 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8779 {
8780 indx = h->dynindx;
8781 BFD_ASSERT (indx != -1);
8782 unresolved_reloc = FALSE;
8783 outrel.r_info = ELF32_R_INFO (indx, r_type);
8784 outrel.r_addend = rel->r_addend;
8785 }
8786 else
8787 {
8788 outrel.r_addend = relocation + rel->r_addend;
8789
8790 if (r_type != R_PPC_ADDR32)
8791 {
8792 if (ifunc != NULL)
8793 {
8794 /* If we get here when building a static
8795 executable, then the libc startup function
8796 responsible for applying indirect function
8797 relocations is going to complain about
8798 the reloc type.
8799 If we get here when building a dynamic
8800 executable, it will be because we have
8801 a text relocation. The dynamic loader
8802 will set the text segment writable and
8803 non-executable to apply text relocations.
8804 So we'll segfault when trying to run the
8805 indirection function to resolve the reloc. */
8806 info->callbacks->einfo
8807 /* xgettext:c-format */
8808 (_("%H: relocation %s for indirect "
8809 "function %s unsupported\n"),
8810 input_bfd, input_section, rel->r_offset,
8811 howto->name,
8812 sym_name);
8813 ret = FALSE;
8814 }
8815 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8816 ;
8817 else if (sec == NULL || sec->owner == NULL)
8818 {
8819 bfd_set_error (bfd_error_bad_value);
8820 ret = FALSE;
8821 }
8822 else
8823 {
8824 asection *osec;
8825
8826 /* We are turning this relocation into one
8827 against a section symbol. It would be
8828 proper to subtract the symbol's value,
8829 osec->vma, from the emitted reloc addend,
8830 but ld.so expects buggy relocs.
8831 FIXME: Why not always use a zero index? */
8832 osec = sec->output_section;
8833 indx = elf_section_data (osec)->dynindx;
8834 if (indx == 0)
8835 {
8836 osec = htab->elf.text_index_section;
8837 indx = elf_section_data (osec)->dynindx;
8838 }
8839 BFD_ASSERT (indx != 0);
8840 #ifdef DEBUG
8841 if (indx == 0)
8842 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8843 indx, osec->name, osec->flags,
8844 h->root.root.string);
8845 #endif
8846 }
8847
8848 outrel.r_info = ELF32_R_INFO (indx, r_type);
8849 }
8850 else if (ifunc != NULL)
8851 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8852 else
8853 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8854 }
8855
8856 sreloc = elf_section_data (input_section)->sreloc;
8857 if (ifunc)
8858 {
8859 sreloc = htab->elf.irelplt;
8860 if (indx == 0)
8861 htab->local_ifunc_resolver = 1;
8862 else if (is_static_defined (h))
8863 htab->maybe_local_ifunc_resolver = 1;
8864 }
8865 if (sreloc == NULL)
8866 return FALSE;
8867
8868 loc = sreloc->contents;
8869 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8870 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8871
8872 if (skip == -1)
8873 goto copy_reloc;
8874
8875 /* This reloc will be computed at runtime. Clear the memory
8876 so that it contains a predictable value for prelink. */
8877 if (!skip)
8878 {
8879 relocation = howto->pc_relative ? outrel.r_offset : 0;
8880 addend = 0;
8881 break;
8882 }
8883 }
8884 break;
8885
8886 case R_PPC_RELAX_PLT:
8887 case R_PPC_RELAX_PLTREL24:
8888 if (h != NULL)
8889 {
8890 struct plt_entry *ent;
8891 bfd_vma got2_addend = 0;
8892
8893 if (r_type == R_PPC_RELAX_PLTREL24)
8894 {
8895 if (bfd_link_pic (info))
8896 got2_addend = addend;
8897 addend = 0;
8898 }
8899 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8900 if (htab->plt_type == PLT_NEW)
8901 relocation = (htab->glink->output_section->vma
8902 + htab->glink->output_offset
8903 + ent->glink_offset);
8904 else
8905 relocation = (htab->elf.splt->output_section->vma
8906 + htab->elf.splt->output_offset
8907 + ent->plt.offset);
8908 }
8909 /* Fall through. */
8910
8911 case R_PPC_RELAX:
8912 {
8913 const int *stub;
8914 size_t size;
8915 size_t insn_offset = rel->r_offset;
8916 unsigned int insn;
8917
8918 if (bfd_link_pic (info))
8919 {
8920 relocation -= (input_section->output_section->vma
8921 + input_section->output_offset
8922 + rel->r_offset - 4);
8923 stub = shared_stub_entry;
8924 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8925 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8926 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8927 stub += 3;
8928 size = ARRAY_SIZE (shared_stub_entry) - 3;
8929 }
8930 else
8931 {
8932 stub = stub_entry;
8933 size = ARRAY_SIZE (stub_entry);
8934 }
8935
8936 relocation += addend;
8937 if (bfd_link_relocatable (info))
8938 relocation = 0;
8939
8940 /* First insn is HA, second is LO. */
8941 insn = *stub++;
8942 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8943 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8944 insn_offset += 4;
8945
8946 insn = *stub++;
8947 insn |= relocation & 0xffff;
8948 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8949 insn_offset += 4;
8950 size -= 2;
8951
8952 while (size != 0)
8953 {
8954 insn = *stub++;
8955 --size;
8956 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8957 insn_offset += 4;
8958 }
8959
8960 /* Rewrite the reloc and convert one of the trailing nop
8961 relocs to describe this relocation. */
8962 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8963 /* The relocs are at the bottom 2 bytes */
8964 wrel->r_offset = rel->r_offset + d_offset;
8965 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8966 wrel->r_addend = rel->r_addend;
8967 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8968 wrel++, rel++;
8969 wrel->r_offset += 4;
8970 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8971 }
8972 continue;
8973
8974 /* Indirect .sdata relocation. */
8975 case R_PPC_EMB_SDAI16:
8976 BFD_ASSERT (htab->sdata[0].section != NULL);
8977 if (!is_static_defined (htab->sdata[0].sym))
8978 {
8979 unresolved_reloc = TRUE;
8980 break;
8981 }
8982 relocation
8983 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8984 h, relocation, rel);
8985 addend = 0;
8986 break;
8987
8988 /* Indirect .sdata2 relocation. */
8989 case R_PPC_EMB_SDA2I16:
8990 BFD_ASSERT (htab->sdata[1].section != NULL);
8991 if (!is_static_defined (htab->sdata[1].sym))
8992 {
8993 unresolved_reloc = TRUE;
8994 break;
8995 }
8996 relocation
8997 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8998 h, relocation, rel);
8999 addend = 0;
9000 break;
9001
9002 /* Handle the TOC16 reloc. We want to use the offset within the .got
9003 section, not the actual VMA. This is appropriate when generating
9004 an embedded ELF object, for which the .got section acts like the
9005 AIX .toc section. */
9006 case R_PPC_TOC16: /* phony GOT16 relocations */
9007 if (sec == NULL || sec->output_section == NULL)
9008 {
9009 unresolved_reloc = TRUE;
9010 break;
9011 }
9012 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9013 ".got") == 0
9014 || strcmp (bfd_get_section_name (sec->owner, sec),
9015 ".cgot") == 0);
9016
9017 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9018 break;
9019
9020 case R_PPC_PLTREL24:
9021 if (h != NULL && ifunc == NULL)
9022 {
9023 struct plt_entry *ent;
9024
9025 ent = find_plt_ent (&h->plt.plist, got2,
9026 bfd_link_pic (info) ? addend : 0);
9027 if (ent == NULL
9028 || htab->elf.splt == NULL)
9029 {
9030 /* We didn't make a PLT entry for this symbol. This
9031 happens when statically linking PIC code, or when
9032 using -Bsymbolic. */
9033 }
9034 else
9035 {
9036 /* Relocation is to the entry for this symbol in the
9037 procedure linkage table. */
9038 unresolved_reloc = FALSE;
9039 if (htab->plt_type == PLT_NEW)
9040 relocation = (htab->glink->output_section->vma
9041 + htab->glink->output_offset
9042 + ent->glink_offset);
9043 else
9044 relocation = (htab->elf.splt->output_section->vma
9045 + htab->elf.splt->output_offset
9046 + ent->plt.offset);
9047 }
9048 }
9049
9050 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9051 addend specifies the GOT pointer offset within .got2.
9052 Don't apply it to the relocation field. */
9053 addend = 0;
9054 break;
9055
9056 /* Relocate against _SDA_BASE_. */
9057 case R_PPC_SDAREL16:
9058 {
9059 const char *name;
9060 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9061
9062 if (sec == NULL
9063 || sec->output_section == NULL
9064 || !is_static_defined (sda))
9065 {
9066 unresolved_reloc = TRUE;
9067 break;
9068 }
9069 addend -= SYM_VAL (sda);
9070
9071 name = bfd_get_section_name (output_bfd, sec->output_section);
9072 if (!(strcmp (name, ".sdata") == 0
9073 || strcmp (name, ".sbss") == 0))
9074 {
9075 info->callbacks->einfo
9076 /* xgettext:c-format */
9077 (_("%P: %B: the target (%s) of a %s relocation is "
9078 "in the wrong output section (%s)\n"),
9079 input_bfd,
9080 sym_name,
9081 howto->name,
9082 name);
9083 }
9084 }
9085 break;
9086
9087 /* Relocate against _SDA2_BASE_. */
9088 case R_PPC_EMB_SDA2REL:
9089 {
9090 const char *name;
9091 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9092
9093 if (sec == NULL
9094 || sec->output_section == NULL
9095 || !is_static_defined (sda))
9096 {
9097 unresolved_reloc = TRUE;
9098 break;
9099 }
9100 addend -= SYM_VAL (sda);
9101
9102 name = bfd_get_section_name (output_bfd, sec->output_section);
9103 if (!(strcmp (name, ".sdata2") == 0
9104 || strcmp (name, ".sbss2") == 0))
9105 {
9106 info->callbacks->einfo
9107 /* xgettext:c-format */
9108 (_("%P: %B: the target (%s) of a %s relocation is "
9109 "in the wrong output section (%s)\n"),
9110 input_bfd,
9111 sym_name,
9112 howto->name,
9113 name);
9114 }
9115 }
9116 break;
9117
9118 case R_PPC_VLE_LO16A:
9119 relocation = relocation + addend;
9120 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9121 contents + rel->r_offset, relocation,
9122 split16a_type, htab->params->vle_reloc_fixup);
9123 goto copy_reloc;
9124
9125 case R_PPC_VLE_LO16D:
9126 relocation = relocation + addend;
9127 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9128 contents + rel->r_offset, relocation,
9129 split16d_type, htab->params->vle_reloc_fixup);
9130 goto copy_reloc;
9131
9132 case R_PPC_VLE_HI16A:
9133 relocation = (relocation + addend) >> 16;
9134 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9135 contents + rel->r_offset, relocation,
9136 split16a_type, htab->params->vle_reloc_fixup);
9137 goto copy_reloc;
9138
9139 case R_PPC_VLE_HI16D:
9140 relocation = (relocation + addend) >> 16;
9141 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9142 contents + rel->r_offset, relocation,
9143 split16d_type, htab->params->vle_reloc_fixup);
9144 goto copy_reloc;
9145
9146 case R_PPC_VLE_HA16A:
9147 relocation = (relocation + addend + 0x8000) >> 16;
9148 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9149 contents + rel->r_offset, relocation,
9150 split16a_type, htab->params->vle_reloc_fixup);
9151 goto copy_reloc;
9152
9153 case R_PPC_VLE_HA16D:
9154 relocation = (relocation + addend + 0x8000) >> 16;
9155 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9156 contents + rel->r_offset, relocation,
9157 split16d_type, htab->params->vle_reloc_fixup);
9158 goto copy_reloc;
9159
9160 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9161 case R_PPC_EMB_SDA21:
9162 case R_PPC_VLE_SDA21:
9163 case R_PPC_EMB_RELSDA:
9164 case R_PPC_VLE_SDA21_LO:
9165 {
9166 const char *name;
9167 int reg;
9168 unsigned int insn;
9169 struct elf_link_hash_entry *sda = NULL;
9170
9171 if (sec == NULL || sec->output_section == NULL)
9172 {
9173 unresolved_reloc = TRUE;
9174 break;
9175 }
9176
9177 name = bfd_get_section_name (output_bfd, sec->output_section);
9178 if (strcmp (name, ".sdata") == 0
9179 || strcmp (name, ".sbss") == 0)
9180 {
9181 reg = 13;
9182 sda = htab->sdata[0].sym;
9183 }
9184 else if (strcmp (name, ".sdata2") == 0
9185 || strcmp (name, ".sbss2") == 0)
9186 {
9187 reg = 2;
9188 sda = htab->sdata[1].sym;
9189 }
9190 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9191 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9192 {
9193 reg = 0;
9194 }
9195 else
9196 {
9197 info->callbacks->einfo
9198 /* xgettext:c-format */
9199 (_("%P: %B: the target (%s) of a %s relocation is "
9200 "in the wrong output section (%s)\n"),
9201 input_bfd,
9202 sym_name,
9203 howto->name,
9204 name);
9205
9206 bfd_set_error (bfd_error_bad_value);
9207 ret = FALSE;
9208 goto copy_reloc;
9209 }
9210
9211 if (sda != NULL)
9212 {
9213 if (!is_static_defined (sda))
9214 {
9215 unresolved_reloc = TRUE;
9216 break;
9217 }
9218 addend -= SYM_VAL (sda);
9219 }
9220
9221 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9222 if (reg == 0
9223 && (r_type == R_PPC_VLE_SDA21
9224 || r_type == R_PPC_VLE_SDA21_LO))
9225 {
9226 relocation = relocation + addend;
9227 addend = 0;
9228
9229 /* Force e_li insn, keeping RT from original insn. */
9230 insn &= 0x1f << 21;
9231 insn |= 28u << 26;
9232
9233 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9234 /* Top 4 bits of value to 17..20. */
9235 insn |= (relocation & 0xf0000) >> 5;
9236 /* Next 5 bits of the value to 11..15. */
9237 insn |= (relocation & 0xf800) << 5;
9238 /* And the final 11 bits of the value to bits 21 to 31. */
9239 insn |= relocation & 0x7ff;
9240
9241 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9242
9243 if (r_type == R_PPC_VLE_SDA21
9244 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9245 goto overflow;
9246 goto copy_reloc;
9247 }
9248 else if (r_type == R_PPC_EMB_SDA21
9249 || r_type == R_PPC_VLE_SDA21
9250 || r_type == R_PPC_VLE_SDA21_LO)
9251 {
9252 /* Fill in register field. */
9253 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9254 }
9255 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9256 }
9257 break;
9258
9259 case R_PPC_VLE_SDAREL_LO16A:
9260 case R_PPC_VLE_SDAREL_LO16D:
9261 case R_PPC_VLE_SDAREL_HI16A:
9262 case R_PPC_VLE_SDAREL_HI16D:
9263 case R_PPC_VLE_SDAREL_HA16A:
9264 case R_PPC_VLE_SDAREL_HA16D:
9265 {
9266 bfd_vma value;
9267 const char *name;
9268 struct elf_link_hash_entry *sda = NULL;
9269
9270 if (sec == NULL || sec->output_section == NULL)
9271 {
9272 unresolved_reloc = TRUE;
9273 break;
9274 }
9275
9276 name = bfd_get_section_name (output_bfd, sec->output_section);
9277 if (strcmp (name, ".sdata") == 0
9278 || strcmp (name, ".sbss") == 0)
9279 sda = htab->sdata[0].sym;
9280 else if (strcmp (name, ".sdata2") == 0
9281 || strcmp (name, ".sbss2") == 0)
9282 sda = htab->sdata[1].sym;
9283 else
9284 {
9285 _bfd_error_handler
9286 /* xgettext:c-format */
9287 (_("%B: the target (%s) of a %s relocation is "
9288 "in the wrong output section (%s)"),
9289 input_bfd,
9290 sym_name,
9291 howto->name,
9292 name);
9293
9294 bfd_set_error (bfd_error_bad_value);
9295 ret = FALSE;
9296 goto copy_reloc;
9297 }
9298
9299 if (sda == NULL || !is_static_defined (sda))
9300 {
9301 unresolved_reloc = TRUE;
9302 break;
9303 }
9304 value = relocation + addend - SYM_VAL (sda);
9305
9306 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9307 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9308 contents + rel->r_offset, value,
9309 split16a_type,
9310 htab->params->vle_reloc_fixup);
9311 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9312 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9313 contents + rel->r_offset, value,
9314 split16d_type,
9315 htab->params->vle_reloc_fixup);
9316 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9317 {
9318 value = value >> 16;
9319 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9320 contents + rel->r_offset, value,
9321 split16a_type,
9322 htab->params->vle_reloc_fixup);
9323 }
9324 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9325 {
9326 value = value >> 16;
9327 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9328 contents + rel->r_offset, value,
9329 split16d_type,
9330 htab->params->vle_reloc_fixup);
9331 }
9332 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9333 {
9334 value = (value + 0x8000) >> 16;
9335 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9336 contents + rel->r_offset, value,
9337 split16a_type,
9338 htab->params->vle_reloc_fixup);
9339 }
9340 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9341 {
9342 value = (value + 0x8000) >> 16;
9343 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9344 contents + rel->r_offset, value,
9345 split16d_type,
9346 htab->params->vle_reloc_fixup);
9347 }
9348 }
9349 goto copy_reloc;
9350
9351 case R_PPC_VLE_ADDR20:
9352 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9353 continue;
9354
9355 /* Relocate against the beginning of the section. */
9356 case R_PPC_SECTOFF:
9357 case R_PPC_SECTOFF_LO:
9358 case R_PPC_SECTOFF_HI:
9359 case R_PPC_SECTOFF_HA:
9360 if (sec == NULL || sec->output_section == NULL)
9361 {
9362 unresolved_reloc = TRUE;
9363 break;
9364 }
9365 addend -= sec->output_section->vma;
9366 break;
9367
9368 /* Negative relocations. */
9369 case R_PPC_EMB_NADDR32:
9370 case R_PPC_EMB_NADDR16:
9371 case R_PPC_EMB_NADDR16_LO:
9372 case R_PPC_EMB_NADDR16_HI:
9373 case R_PPC_EMB_NADDR16_HA:
9374 addend -= 2 * relocation;
9375 break;
9376
9377 case R_PPC_COPY:
9378 case R_PPC_GLOB_DAT:
9379 case R_PPC_JMP_SLOT:
9380 case R_PPC_RELATIVE:
9381 case R_PPC_IRELATIVE:
9382 case R_PPC_PLT32:
9383 case R_PPC_PLTREL32:
9384 case R_PPC_PLT16_LO:
9385 case R_PPC_PLT16_HI:
9386 case R_PPC_PLT16_HA:
9387 case R_PPC_ADDR30:
9388 case R_PPC_EMB_RELSEC16:
9389 case R_PPC_EMB_RELST_LO:
9390 case R_PPC_EMB_RELST_HI:
9391 case R_PPC_EMB_RELST_HA:
9392 case R_PPC_EMB_BIT_FLD:
9393 info->callbacks->einfo
9394 /* xgettext:c-format */
9395 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9396 input_bfd,
9397 howto->name,
9398 sym_name);
9399
9400 bfd_set_error (bfd_error_invalid_operation);
9401 ret = FALSE;
9402 goto copy_reloc;
9403 }
9404
9405 /* Do any further special processing. */
9406 switch (r_type)
9407 {
9408 default:
9409 break;
9410
9411 case R_PPC_ADDR16_HA:
9412 case R_PPC_REL16_HA:
9413 case R_PPC_REL16DX_HA:
9414 case R_PPC_SECTOFF_HA:
9415 case R_PPC_TPREL16_HA:
9416 case R_PPC_DTPREL16_HA:
9417 case R_PPC_EMB_NADDR16_HA:
9418 case R_PPC_EMB_RELST_HA:
9419 /* It's just possible that this symbol is a weak symbol
9420 that's not actually defined anywhere. In that case,
9421 'sec' would be NULL, and we should leave the symbol
9422 alone (it will be set to zero elsewhere in the link). */
9423 if (sec == NULL)
9424 break;
9425 /* Fall through. */
9426
9427 case R_PPC_PLT16_HA:
9428 case R_PPC_GOT16_HA:
9429 case R_PPC_GOT_TLSGD16_HA:
9430 case R_PPC_GOT_TLSLD16_HA:
9431 case R_PPC_GOT_TPREL16_HA:
9432 case R_PPC_GOT_DTPREL16_HA:
9433 /* Add 0x10000 if sign bit in 0:15 is set.
9434 Bits 0:15 are not used. */
9435 addend += 0x8000;
9436 break;
9437
9438 case R_PPC_ADDR16:
9439 case R_PPC_ADDR16_LO:
9440 case R_PPC_GOT16:
9441 case R_PPC_GOT16_LO:
9442 case R_PPC_SDAREL16:
9443 case R_PPC_SECTOFF:
9444 case R_PPC_SECTOFF_LO:
9445 case R_PPC_DTPREL16:
9446 case R_PPC_DTPREL16_LO:
9447 case R_PPC_TPREL16:
9448 case R_PPC_TPREL16_LO:
9449 case R_PPC_GOT_TLSGD16:
9450 case R_PPC_GOT_TLSGD16_LO:
9451 case R_PPC_GOT_TLSLD16:
9452 case R_PPC_GOT_TLSLD16_LO:
9453 case R_PPC_GOT_DTPREL16:
9454 case R_PPC_GOT_DTPREL16_LO:
9455 case R_PPC_GOT_TPREL16:
9456 case R_PPC_GOT_TPREL16_LO:
9457 {
9458 /* The 32-bit ABI lacks proper relocations to deal with
9459 certain 64-bit instructions. Prevent damage to bits
9460 that make up part of the insn opcode. */
9461 unsigned int insn, mask, lobit;
9462
9463 insn = bfd_get_32 (input_bfd,
9464 contents + rel->r_offset - d_offset);
9465 mask = 0;
9466 if (is_insn_ds_form (insn))
9467 mask = 3;
9468 else if (is_insn_dq_form (insn))
9469 mask = 15;
9470 else
9471 break;
9472 relocation += addend;
9473 addend = insn & mask;
9474 lobit = mask & relocation;
9475 if (lobit != 0)
9476 {
9477 relocation ^= lobit;
9478 info->callbacks->einfo
9479 /* xgettext:c-format */
9480 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9481 input_bfd, input_section, rel->r_offset,
9482 howto->name, sym_name, mask + 1);
9483 bfd_set_error (bfd_error_bad_value);
9484 ret = FALSE;
9485 }
9486 }
9487 break;
9488 }
9489
9490 #ifdef DEBUG
9491 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9492 "offset = %ld, addend = %ld\n",
9493 howto->name,
9494 (int) r_type,
9495 sym_name,
9496 r_symndx,
9497 (long) rel->r_offset,
9498 (long) addend);
9499 #endif
9500
9501 if (unresolved_reloc
9502 && !((input_section->flags & SEC_DEBUGGING) != 0
9503 && h->def_dynamic)
9504 && _bfd_elf_section_offset (output_bfd, info, input_section,
9505 rel->r_offset) != (bfd_vma) -1)
9506 {
9507 info->callbacks->einfo
9508 /* xgettext:c-format */
9509 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9510 input_bfd, input_section, rel->r_offset,
9511 howto->name,
9512 sym_name);
9513 ret = FALSE;
9514 }
9515
9516 /* 16-bit fields in insns mostly have signed values, but a
9517 few insns have 16-bit unsigned values. Really, we should
9518 have different reloc types. */
9519 if (howto->complain_on_overflow != complain_overflow_dont
9520 && howto->dst_mask == 0xffff
9521 && (input_section->flags & SEC_CODE) != 0)
9522 {
9523 enum complain_overflow complain = complain_overflow_signed;
9524
9525 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9526 {
9527 unsigned int insn;
9528
9529 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9530 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9531 complain = complain_overflow_bitfield;
9532 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9533 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9534 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9535 complain = complain_overflow_unsigned;
9536 }
9537 if (howto->complain_on_overflow != complain)
9538 {
9539 alt_howto = *howto;
9540 alt_howto.complain_on_overflow = complain;
9541 howto = &alt_howto;
9542 }
9543 }
9544
9545 if (r_type == R_PPC_REL16DX_HA)
9546 {
9547 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9548 if (rel->r_offset + 4 > input_section->size)
9549 r = bfd_reloc_outofrange;
9550 else
9551 {
9552 unsigned int insn;
9553
9554 relocation += addend;
9555 relocation -= (rel->r_offset
9556 + input_section->output_offset
9557 + input_section->output_section->vma);
9558 relocation >>= 16;
9559 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9560 insn &= ~0x1fffc1;
9561 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9562 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9563 r = bfd_reloc_ok;
9564 }
9565 }
9566 else
9567 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9568 rel->r_offset, relocation, addend);
9569
9570 if (r != bfd_reloc_ok)
9571 {
9572 if (r == bfd_reloc_overflow)
9573 {
9574 overflow:
9575 /* On code like "if (foo) foo();" don't report overflow
9576 on a branch to zero when foo is undefined. */
9577 if (!warned
9578 && !(h != NULL
9579 && (h->root.type == bfd_link_hash_undefweak
9580 || h->root.type == bfd_link_hash_undefined)
9581 && is_branch_reloc (r_type)))
9582 info->callbacks->reloc_overflow
9583 (info, (h ? &h->root : NULL), sym_name, howto->name,
9584 rel->r_addend, input_bfd, input_section, rel->r_offset);
9585 }
9586 else
9587 {
9588 info->callbacks->einfo
9589 /* xgettext:c-format */
9590 (_("%H: %s reloc against `%s': error %d\n"),
9591 input_bfd, input_section, rel->r_offset,
9592 howto->name, sym_name, (int) r);
9593 ret = FALSE;
9594 }
9595 }
9596 copy_reloc:
9597 if (wrel != rel)
9598 *wrel = *rel;
9599 }
9600
9601 if (wrel != rel)
9602 {
9603 Elf_Internal_Shdr *rel_hdr;
9604 size_t deleted = rel - wrel;
9605
9606 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9607 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9608 if (rel_hdr->sh_size == 0)
9609 {
9610 /* It is too late to remove an empty reloc section. Leave
9611 one NONE reloc.
9612 ??? What is wrong with an empty section??? */
9613 rel_hdr->sh_size = rel_hdr->sh_entsize;
9614 deleted -= 1;
9615 wrel++;
9616 }
9617 relend = wrel;
9618 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9619 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9620 input_section->reloc_count -= deleted;
9621 }
9622
9623 #ifdef DEBUG
9624 fprintf (stderr, "\n");
9625 #endif
9626
9627 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9628 && input_section->size != input_section->rawsize
9629 && (strcmp (input_section->output_section->name, ".init") == 0
9630 || strcmp (input_section->output_section->name, ".fini") == 0))
9631 {
9632 /* Branch around the trampolines. */
9633 unsigned int insn = B + input_section->size - input_section->rawsize;
9634 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9635 }
9636
9637 if (htab->params->ppc476_workaround
9638 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9639 && (!bfd_link_relocatable (info)
9640 || (input_section->output_section->alignment_power
9641 >= htab->params->pagesize_p2)))
9642 {
9643 bfd_vma start_addr, end_addr, addr;
9644 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9645
9646 if (relax_info->workaround_size != 0)
9647 {
9648 bfd_byte *p;
9649 unsigned int n;
9650 bfd_byte fill[4];
9651
9652 bfd_put_32 (input_bfd, BA, fill);
9653 p = contents + input_section->size - relax_info->workaround_size;
9654 n = relax_info->workaround_size >> 2;
9655 while (n--)
9656 {
9657 memcpy (p, fill, 4);
9658 p += 4;
9659 }
9660 }
9661
9662 /* The idea is: Replace the last instruction on a page with a
9663 branch to a patch area. Put the insn there followed by a
9664 branch back to the next page. Complicated a little by
9665 needing to handle moved conditional branches, and by not
9666 wanting to touch data-in-text. */
9667
9668 start_addr = (input_section->output_section->vma
9669 + input_section->output_offset);
9670 end_addr = (start_addr + input_section->size
9671 - relax_info->workaround_size);
9672 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9673 addr < end_addr;
9674 addr += pagesize)
9675 {
9676 bfd_vma offset = addr - start_addr;
9677 Elf_Internal_Rela *lo, *hi;
9678 bfd_boolean is_data;
9679 bfd_vma patch_off, patch_addr;
9680 unsigned int insn;
9681
9682 /* Do we have a data reloc at this offset? If so, leave
9683 the word alone. */
9684 is_data = FALSE;
9685 lo = relocs;
9686 hi = relend;
9687 rel = NULL;
9688 while (lo < hi)
9689 {
9690 rel = lo + (hi - lo) / 2;
9691 if (rel->r_offset < offset)
9692 lo = rel + 1;
9693 else if (rel->r_offset > offset + 3)
9694 hi = rel;
9695 else
9696 {
9697 switch (ELF32_R_TYPE (rel->r_info))
9698 {
9699 case R_PPC_ADDR32:
9700 case R_PPC_UADDR32:
9701 case R_PPC_REL32:
9702 case R_PPC_ADDR30:
9703 is_data = TRUE;
9704 break;
9705 default:
9706 break;
9707 }
9708 break;
9709 }
9710 }
9711 if (is_data)
9712 continue;
9713
9714 /* Some instructions can be left alone too. Unconditional
9715 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9716 avoid the icache failure.
9717
9718 The problem occurs due to prefetch across a page boundary
9719 where stale instructions can be fetched from the next
9720 page, and the mechanism for flushing these bad
9721 instructions fails under certain circumstances. The
9722 unconditional branches:
9723 1) Branch: b, bl, ba, bla,
9724 2) Branch Conditional: bc, bca, bcl, bcla,
9725 3) Branch Conditional to Link Register: bclr, bclrl,
9726 where (2) and (3) have BO=0x14 making them unconditional,
9727 prevent the bad prefetch because the prefetch itself is
9728 affected by these instructions. This happens even if the
9729 instruction is not executed.
9730
9731 A bctr example:
9732 .
9733 . lis 9,new_page@ha
9734 . addi 9,9,new_page@l
9735 . mtctr 9
9736 . bctr
9737 . nop
9738 . nop
9739 . new_page:
9740 .
9741 The bctr is not predicted taken due to ctr not being
9742 ready, so prefetch continues on past the bctr into the
9743 new page which might have stale instructions. If they
9744 fail to be flushed, then they will be executed after the
9745 bctr executes. Either of the following modifications
9746 prevent the bad prefetch from happening in the first
9747 place:
9748 .
9749 . lis 9,new_page@ha lis 9,new_page@ha
9750 . addi 9,9,new_page@l addi 9,9,new_page@l
9751 . mtctr 9 mtctr 9
9752 . bctr bctr
9753 . nop b somewhere_else
9754 . b somewhere_else nop
9755 . new_page: new_page:
9756 . */
9757 insn = bfd_get_32 (input_bfd, contents + offset);
9758 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9759 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9760 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9761 || ((insn & (0x3f << 26)) == (19u << 26)
9762 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9763 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9764 continue;
9765
9766 patch_addr = (start_addr + input_section->size
9767 - relax_info->workaround_size);
9768 patch_addr = (patch_addr + 15) & -16;
9769 patch_off = patch_addr - start_addr;
9770 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9771
9772 if (rel != NULL
9773 && rel->r_offset >= offset
9774 && rel->r_offset < offset + 4)
9775 {
9776 asection *sreloc;
9777
9778 /* If the insn we are patching had a reloc, adjust the
9779 reloc r_offset so that the reloc applies to the moved
9780 location. This matters for -r and --emit-relocs. */
9781 if (rel + 1 != relend)
9782 {
9783 Elf_Internal_Rela tmp = *rel;
9784
9785 /* Keep the relocs sorted by r_offset. */
9786 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9787 relend[-1] = tmp;
9788 }
9789 relend[-1].r_offset += patch_off - offset;
9790
9791 /* Adjust REL16 addends too. */
9792 switch (ELF32_R_TYPE (relend[-1].r_info))
9793 {
9794 case R_PPC_REL16:
9795 case R_PPC_REL16_LO:
9796 case R_PPC_REL16_HI:
9797 case R_PPC_REL16_HA:
9798 relend[-1].r_addend += patch_off - offset;
9799 break;
9800 default:
9801 break;
9802 }
9803
9804 /* If we are building a PIE or shared library with
9805 non-PIC objects, perhaps we had a dynamic reloc too?
9806 If so, the dynamic reloc must move with the insn. */
9807 sreloc = elf_section_data (input_section)->sreloc;
9808 if (sreloc != NULL)
9809 {
9810 Elf32_External_Rela *slo, *shi, *srelend;
9811 bfd_vma soffset;
9812
9813 slo = (Elf32_External_Rela *) sreloc->contents;
9814 shi = srelend = slo + sreloc->reloc_count;
9815 soffset = (offset + input_section->output_section->vma
9816 + input_section->output_offset);
9817 while (slo < shi)
9818 {
9819 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9820 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9821 &outrel);
9822 if (outrel.r_offset < soffset)
9823 slo = srel + 1;
9824 else if (outrel.r_offset > soffset + 3)
9825 shi = srel;
9826 else
9827 {
9828 if (srel + 1 != srelend)
9829 {
9830 memmove (srel, srel + 1,
9831 (srelend - (srel + 1)) * sizeof (*srel));
9832 srel = srelend - 1;
9833 }
9834 outrel.r_offset += patch_off - offset;
9835 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9836 (bfd_byte *) srel);
9837 break;
9838 }
9839 }
9840 }
9841 }
9842 else
9843 rel = NULL;
9844
9845 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9846 && (insn & 2) == 0 /* relative */)
9847 {
9848 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9849
9850 delta += offset - patch_off;
9851 if (bfd_link_relocatable (info) && rel != NULL)
9852 delta = 0;
9853 if (!bfd_link_relocatable (info) && rel != NULL)
9854 {
9855 enum elf_ppc_reloc_type r_type;
9856
9857 r_type = ELF32_R_TYPE (relend[-1].r_info);
9858 if (r_type == R_PPC_REL14_BRTAKEN)
9859 insn |= BRANCH_PREDICT_BIT;
9860 else if (r_type == R_PPC_REL14_BRNTAKEN)
9861 insn &= ~BRANCH_PREDICT_BIT;
9862 else
9863 BFD_ASSERT (r_type == R_PPC_REL14);
9864
9865 if ((r_type == R_PPC_REL14_BRTAKEN
9866 || r_type == R_PPC_REL14_BRNTAKEN)
9867 && delta + 0x8000 < 0x10000
9868 && (bfd_signed_vma) delta < 0)
9869 insn ^= BRANCH_PREDICT_BIT;
9870 }
9871 if (delta + 0x8000 < 0x10000)
9872 {
9873 bfd_put_32 (input_bfd,
9874 (insn & ~0xfffc) | (delta & 0xfffc),
9875 contents + patch_off);
9876 patch_off += 4;
9877 bfd_put_32 (input_bfd,
9878 B | ((offset + 4 - patch_off) & 0x3fffffc),
9879 contents + patch_off);
9880 patch_off += 4;
9881 }
9882 else
9883 {
9884 if (rel != NULL)
9885 {
9886 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9887
9888 relend[-1].r_offset += 8;
9889 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9890 }
9891 bfd_put_32 (input_bfd,
9892 (insn & ~0xfffc) | 8,
9893 contents + patch_off);
9894 patch_off += 4;
9895 bfd_put_32 (input_bfd,
9896 B | ((offset + 4 - patch_off) & 0x3fffffc),
9897 contents + patch_off);
9898 patch_off += 4;
9899 bfd_put_32 (input_bfd,
9900 B | ((delta - 8) & 0x3fffffc),
9901 contents + patch_off);
9902 patch_off += 4;
9903 }
9904 }
9905 else
9906 {
9907 bfd_put_32 (input_bfd, insn, contents + patch_off);
9908 patch_off += 4;
9909 bfd_put_32 (input_bfd,
9910 B | ((offset + 4 - patch_off) & 0x3fffffc),
9911 contents + patch_off);
9912 patch_off += 4;
9913 }
9914 BFD_ASSERT (patch_off <= input_section->size);
9915 relax_info->workaround_size = input_section->size - patch_off;
9916 }
9917 }
9918
9919 return ret;
9920 }
9921 \f
9922 /* Finish up dynamic symbol handling. We set the contents of various
9923 dynamic sections here. */
9924
9925 static bfd_boolean
9926 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9927 struct bfd_link_info *info,
9928 struct elf_link_hash_entry *h,
9929 Elf_Internal_Sym *sym)
9930 {
9931 struct ppc_elf_link_hash_table *htab;
9932 struct plt_entry *ent;
9933 bfd_boolean doneone;
9934
9935 #ifdef DEBUG
9936 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9937 h->root.root.string);
9938 #endif
9939
9940 htab = ppc_elf_hash_table (info);
9941 BFD_ASSERT (htab->elf.dynobj != NULL);
9942
9943 doneone = FALSE;
9944 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9945 if (ent->plt.offset != (bfd_vma) -1)
9946 {
9947 if (!doneone)
9948 {
9949 Elf_Internal_Rela rela;
9950 bfd_byte *loc;
9951 bfd_vma reloc_index;
9952
9953 if (htab->plt_type == PLT_NEW
9954 || !htab->elf.dynamic_sections_created
9955 || h->dynindx == -1)
9956 reloc_index = ent->plt.offset / 4;
9957 else
9958 {
9959 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9960 / htab->plt_slot_size);
9961 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9962 && htab->plt_type == PLT_OLD)
9963 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9964 }
9965
9966 /* This symbol has an entry in the procedure linkage table.
9967 Set it up. */
9968 if (htab->plt_type == PLT_VXWORKS
9969 && htab->elf.dynamic_sections_created
9970 && h->dynindx != -1)
9971 {
9972 bfd_vma got_offset;
9973 const bfd_vma *plt_entry;
9974
9975 /* The first three entries in .got.plt are reserved. */
9976 got_offset = (reloc_index + 3) * 4;
9977
9978 /* Use the right PLT. */
9979 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9980 : ppc_elf_vxworks_plt_entry;
9981
9982 /* Fill in the .plt on VxWorks. */
9983 if (bfd_link_pic (info))
9984 {
9985 bfd_put_32 (output_bfd,
9986 plt_entry[0] | PPC_HA (got_offset),
9987 htab->elf.splt->contents + ent->plt.offset + 0);
9988 bfd_put_32 (output_bfd,
9989 plt_entry[1] | PPC_LO (got_offset),
9990 htab->elf.splt->contents + ent->plt.offset + 4);
9991 }
9992 else
9993 {
9994 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9995
9996 bfd_put_32 (output_bfd,
9997 plt_entry[0] | PPC_HA (got_loc),
9998 htab->elf.splt->contents + ent->plt.offset + 0);
9999 bfd_put_32 (output_bfd,
10000 plt_entry[1] | PPC_LO (got_loc),
10001 htab->elf.splt->contents + ent->plt.offset + 4);
10002 }
10003
10004 bfd_put_32 (output_bfd, plt_entry[2],
10005 htab->elf.splt->contents + ent->plt.offset + 8);
10006 bfd_put_32 (output_bfd, plt_entry[3],
10007 htab->elf.splt->contents + ent->plt.offset + 12);
10008
10009 /* This instruction is an immediate load. The value loaded is
10010 the byte offset of the R_PPC_JMP_SLOT relocation from the
10011 start of the .rela.plt section. The value is stored in the
10012 low-order 16 bits of the load instruction. */
10013 /* NOTE: It appears that this is now an index rather than a
10014 prescaled offset. */
10015 bfd_put_32 (output_bfd,
10016 plt_entry[4] | reloc_index,
10017 htab->elf.splt->contents + ent->plt.offset + 16);
10018 /* This instruction is a PC-relative branch whose target is
10019 the start of the PLT section. The address of this branch
10020 instruction is 20 bytes beyond the start of this PLT entry.
10021 The address is encoded in bits 6-29, inclusive. The value
10022 stored is right-shifted by two bits, permitting a 26-bit
10023 offset. */
10024 bfd_put_32 (output_bfd,
10025 (plt_entry[5]
10026 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10027 htab->elf.splt->contents + ent->plt.offset + 20);
10028 bfd_put_32 (output_bfd, plt_entry[6],
10029 htab->elf.splt->contents + ent->plt.offset + 24);
10030 bfd_put_32 (output_bfd, plt_entry[7],
10031 htab->elf.splt->contents + ent->plt.offset + 28);
10032
10033 /* Fill in the GOT entry corresponding to this PLT slot with
10034 the address immediately after the "bctr" instruction
10035 in this PLT entry. */
10036 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10037 + htab->elf.splt->output_offset
10038 + ent->plt.offset + 16),
10039 htab->elf.sgotplt->contents + got_offset);
10040
10041 if (!bfd_link_pic (info))
10042 {
10043 /* Fill in a couple of entries in .rela.plt.unloaded. */
10044 loc = htab->srelplt2->contents
10045 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10046 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10047 * sizeof (Elf32_External_Rela));
10048
10049 /* Provide the @ha relocation for the first instruction. */
10050 rela.r_offset = (htab->elf.splt->output_section->vma
10051 + htab->elf.splt->output_offset
10052 + ent->plt.offset + 2);
10053 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10054 R_PPC_ADDR16_HA);
10055 rela.r_addend = got_offset;
10056 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10057 loc += sizeof (Elf32_External_Rela);
10058
10059 /* Provide the @l relocation for the second instruction. */
10060 rela.r_offset = (htab->elf.splt->output_section->vma
10061 + htab->elf.splt->output_offset
10062 + ent->plt.offset + 6);
10063 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10064 R_PPC_ADDR16_LO);
10065 rela.r_addend = got_offset;
10066 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10067 loc += sizeof (Elf32_External_Rela);
10068
10069 /* Provide a relocation for the GOT entry corresponding to this
10070 PLT slot. Point it at the middle of the .plt entry. */
10071 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10072 + htab->elf.sgotplt->output_offset
10073 + got_offset);
10074 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10075 R_PPC_ADDR32);
10076 rela.r_addend = ent->plt.offset + 16;
10077 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10078 }
10079
10080 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10081 In particular, the offset for the relocation is not the
10082 address of the PLT entry for this function, as specified
10083 by the ABI. Instead, the offset is set to the address of
10084 the GOT slot for this function. See EABI 4.4.4.1. */
10085 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10086 + htab->elf.sgotplt->output_offset
10087 + got_offset);
10088
10089 }
10090 else
10091 {
10092 asection *splt = htab->elf.splt;
10093 if (!htab->elf.dynamic_sections_created
10094 || h->dynindx == -1)
10095 splt = htab->elf.iplt;
10096
10097 rela.r_offset = (splt->output_section->vma
10098 + splt->output_offset
10099 + ent->plt.offset);
10100 if (htab->plt_type == PLT_OLD
10101 || !htab->elf.dynamic_sections_created
10102 || h->dynindx == -1)
10103 {
10104 /* We don't need to fill in the .plt. The ppc dynamic
10105 linker will fill it in. */
10106 }
10107 else
10108 {
10109 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10110 + htab->glink->output_section->vma
10111 + htab->glink->output_offset);
10112 bfd_put_32 (output_bfd, val,
10113 splt->contents + ent->plt.offset);
10114 }
10115 }
10116
10117 /* Fill in the entry in the .rela.plt section. */
10118 rela.r_addend = 0;
10119 if (!htab->elf.dynamic_sections_created
10120 || h->dynindx == -1)
10121 {
10122 BFD_ASSERT (h->type == STT_GNU_IFUNC
10123 && h->def_regular
10124 && (h->root.type == bfd_link_hash_defined
10125 || h->root.type == bfd_link_hash_defweak));
10126 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10127 rela.r_addend = SYM_VAL (h);
10128 }
10129 else
10130 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10131
10132 if (!htab->elf.dynamic_sections_created
10133 || h->dynindx == -1)
10134 {
10135 loc = (htab->elf.irelplt->contents
10136 + (htab->elf.irelplt->reloc_count++
10137 * sizeof (Elf32_External_Rela)));
10138 htab->local_ifunc_resolver = 1;
10139 }
10140 else
10141 {
10142 loc = (htab->elf.srelplt->contents
10143 + reloc_index * sizeof (Elf32_External_Rela));
10144 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10145 htab->maybe_local_ifunc_resolver = 1;
10146 }
10147 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10148
10149 if (!h->def_regular)
10150 {
10151 /* Mark the symbol as undefined, rather than as
10152 defined in the .plt section. Leave the value if
10153 there were any relocations where pointer equality
10154 matters (this is a clue for the dynamic linker, to
10155 make function pointer comparisons work between an
10156 application and shared library), otherwise set it
10157 to zero. */
10158 sym->st_shndx = SHN_UNDEF;
10159 if (!h->pointer_equality_needed)
10160 sym->st_value = 0;
10161 else if (!h->ref_regular_nonweak)
10162 {
10163 /* This breaks function pointer comparisons, but
10164 that is better than breaking tests for a NULL
10165 function pointer. */
10166 sym->st_value = 0;
10167 }
10168 }
10169 else if (h->type == STT_GNU_IFUNC
10170 && !bfd_link_pic (info))
10171 {
10172 /* Set the value of ifunc symbols in a non-pie
10173 executable to the glink entry. This is to avoid
10174 text relocations. We can't do this for ifunc in
10175 allocate_dynrelocs, as we do for normal dynamic
10176 function symbols with plt entries, because we need
10177 to keep the original value around for the ifunc
10178 relocation. */
10179 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10180 (output_bfd, htab->glink->output_section));
10181 sym->st_value = (ent->glink_offset
10182 + htab->glink->output_offset
10183 + htab->glink->output_section->vma);
10184 }
10185 doneone = TRUE;
10186 }
10187
10188 if (htab->plt_type == PLT_NEW
10189 || !htab->elf.dynamic_sections_created
10190 || h->dynindx == -1)
10191 {
10192 unsigned char *p;
10193 asection *splt = htab->elf.splt;
10194 if (!htab->elf.dynamic_sections_created
10195 || h->dynindx == -1)
10196 splt = htab->elf.iplt;
10197
10198 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10199
10200 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10201 {
10202 bfd_put_32 (output_bfd, LWZ_11_3, p);
10203 p += 4;
10204 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10205 p += 4;
10206 bfd_put_32 (output_bfd, MR_0_3, p);
10207 p += 4;
10208 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10209 p += 4;
10210 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10211 p += 4;
10212 bfd_put_32 (output_bfd, BEQLR, p);
10213 p += 4;
10214 bfd_put_32 (output_bfd, MR_3_0, p);
10215 p += 4;
10216 bfd_put_32 (output_bfd, NOP, p);
10217 p += 4;
10218 }
10219
10220 write_glink_stub (ent, splt, p, info);
10221
10222 if (!bfd_link_pic (info))
10223 /* We only need one non-PIC glink stub. */
10224 break;
10225 }
10226 else
10227 break;
10228 }
10229
10230 if (h->needs_copy)
10231 {
10232 asection *s;
10233 Elf_Internal_Rela rela;
10234 bfd_byte *loc;
10235
10236 /* This symbols needs a copy reloc. Set it up. */
10237
10238 #ifdef DEBUG
10239 fprintf (stderr, ", copy");
10240 #endif
10241
10242 BFD_ASSERT (h->dynindx != -1);
10243
10244 if (ppc_elf_hash_entry (h)->has_sda_refs)
10245 s = htab->relsbss;
10246 else if (h->root.u.def.section == htab->elf.sdynrelro)
10247 s = htab->elf.sreldynrelro;
10248 else
10249 s = htab->elf.srelbss;
10250 BFD_ASSERT (s != NULL);
10251
10252 rela.r_offset = SYM_VAL (h);
10253 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10254 rela.r_addend = 0;
10255 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10256 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10257 }
10258
10259 #ifdef DEBUG
10260 fprintf (stderr, "\n");
10261 #endif
10262
10263 return TRUE;
10264 }
10265 \f
10266 static enum elf_reloc_type_class
10267 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10268 const asection *rel_sec,
10269 const Elf_Internal_Rela *rela)
10270 {
10271 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10272
10273 if (rel_sec == htab->elf.irelplt)
10274 return reloc_class_ifunc;
10275
10276 switch (ELF32_R_TYPE (rela->r_info))
10277 {
10278 case R_PPC_RELATIVE:
10279 return reloc_class_relative;
10280 case R_PPC_JMP_SLOT:
10281 return reloc_class_plt;
10282 case R_PPC_COPY:
10283 return reloc_class_copy;
10284 default:
10285 return reloc_class_normal;
10286 }
10287 }
10288 \f
10289 /* Finish up the dynamic sections. */
10290
10291 static bfd_boolean
10292 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10293 struct bfd_link_info *info)
10294 {
10295 asection *sdyn;
10296 struct ppc_elf_link_hash_table *htab;
10297 bfd_vma got;
10298 bfd *dynobj;
10299 bfd_boolean ret = TRUE;
10300
10301 #ifdef DEBUG
10302 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10303 #endif
10304
10305 htab = ppc_elf_hash_table (info);
10306 dynobj = htab->elf.dynobj;
10307 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10308
10309 got = 0;
10310 if (htab->elf.hgot != NULL)
10311 got = SYM_VAL (htab->elf.hgot);
10312
10313 if (htab->elf.dynamic_sections_created)
10314 {
10315 Elf32_External_Dyn *dyncon, *dynconend;
10316
10317 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10318
10319 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10320 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10321 for (; dyncon < dynconend; dyncon++)
10322 {
10323 Elf_Internal_Dyn dyn;
10324 asection *s;
10325
10326 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10327
10328 switch (dyn.d_tag)
10329 {
10330 case DT_PLTGOT:
10331 if (htab->is_vxworks)
10332 s = htab->elf.sgotplt;
10333 else
10334 s = htab->elf.splt;
10335 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10336 break;
10337
10338 case DT_PLTRELSZ:
10339 dyn.d_un.d_val = htab->elf.srelplt->size;
10340 break;
10341
10342 case DT_JMPREL:
10343 s = htab->elf.srelplt;
10344 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10345 break;
10346
10347 case DT_PPC_GOT:
10348 dyn.d_un.d_ptr = got;
10349 break;
10350
10351 case DT_TEXTREL:
10352 if (htab->local_ifunc_resolver)
10353 info->callbacks->einfo
10354 (_("%X%P: text relocations and GNU indirect "
10355 "functions will result in a segfault at runtime\n"));
10356 else if (htab->maybe_local_ifunc_resolver)
10357 info->callbacks->einfo
10358 (_("%P: warning: text relocations and GNU indirect "
10359 "functions may result in a segfault at runtime\n"));
10360 continue;
10361
10362 default:
10363 if (htab->is_vxworks
10364 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10365 break;
10366 continue;
10367 }
10368
10369 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10370 }
10371 }
10372
10373 if (htab->elf.sgot != NULL
10374 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10375 {
10376 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10377 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10378 {
10379 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10380
10381 p += htab->elf.hgot->root.u.def.value;
10382 if (htab->plt_type == PLT_OLD)
10383 {
10384 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10385 so that a function can easily find the address of
10386 _GLOBAL_OFFSET_TABLE_. */
10387 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10388 < htab->elf.hgot->root.u.def.section->size);
10389 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10390 }
10391
10392 if (sdyn != NULL)
10393 {
10394 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10395 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10396 < htab->elf.hgot->root.u.def.section->size);
10397 bfd_put_32 (output_bfd, val, p);
10398 }
10399 }
10400 else
10401 {
10402 /* xgettext:c-format */
10403 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10404 htab->elf.hgot->root.root.string,
10405 (htab->elf.sgotplt != NULL
10406 ? htab->elf.sgotplt->name
10407 : htab->elf.sgot->name));
10408 bfd_set_error (bfd_error_bad_value);
10409 ret = FALSE;
10410 }
10411
10412 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10413 }
10414
10415 /* Fill in the first entry in the VxWorks procedure linkage table. */
10416 if (htab->is_vxworks
10417 && htab->elf.splt != NULL
10418 && htab->elf.splt->size != 0
10419 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10420 {
10421 asection *splt = htab->elf.splt;
10422 /* Use the right PLT. */
10423 const bfd_vma *plt_entry = (bfd_link_pic (info)
10424 ? ppc_elf_vxworks_pic_plt0_entry
10425 : ppc_elf_vxworks_plt0_entry);
10426
10427 if (!bfd_link_pic (info))
10428 {
10429 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10430
10431 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10432 splt->contents + 0);
10433 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10434 splt->contents + 4);
10435 }
10436 else
10437 {
10438 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10439 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10440 }
10441 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10442 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10443 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10444 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10445 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10446 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10447
10448 if (! bfd_link_pic (info))
10449 {
10450 Elf_Internal_Rela rela;
10451 bfd_byte *loc;
10452
10453 loc = htab->srelplt2->contents;
10454
10455 /* Output the @ha relocation for the first instruction. */
10456 rela.r_offset = (htab->elf.splt->output_section->vma
10457 + htab->elf.splt->output_offset
10458 + 2);
10459 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10460 rela.r_addend = 0;
10461 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10462 loc += sizeof (Elf32_External_Rela);
10463
10464 /* Output the @l relocation for the second instruction. */
10465 rela.r_offset = (htab->elf.splt->output_section->vma
10466 + htab->elf.splt->output_offset
10467 + 6);
10468 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10469 rela.r_addend = 0;
10470 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10471 loc += sizeof (Elf32_External_Rela);
10472
10473 /* Fix up the remaining relocations. They may have the wrong
10474 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10475 in which symbols were output. */
10476 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10477 {
10478 Elf_Internal_Rela rel;
10479
10480 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10481 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10482 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10483 loc += sizeof (Elf32_External_Rela);
10484
10485 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10486 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10487 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10488 loc += sizeof (Elf32_External_Rela);
10489
10490 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10491 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10492 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10493 loc += sizeof (Elf32_External_Rela);
10494 }
10495 }
10496 }
10497
10498 if (htab->glink != NULL
10499 && htab->glink->contents != NULL
10500 && htab->elf.dynamic_sections_created)
10501 {
10502 unsigned char *p;
10503 unsigned char *endp;
10504 bfd_vma res0;
10505 unsigned int i;
10506
10507 /*
10508 * PIC glink code is the following:
10509 *
10510 * # ith PLT code stub.
10511 * addis 11,30,(plt+(i-1)*4-got)@ha
10512 * lwz 11,(plt+(i-1)*4-got)@l(11)
10513 * mtctr 11
10514 * bctr
10515 *
10516 * # A table of branches, one for each plt entry.
10517 * # The idea is that the plt call stub loads ctr and r11 with these
10518 * # addresses, so (r11 - res_0) gives the plt index * 4.
10519 * res_0: b PLTresolve
10520 * res_1: b PLTresolve
10521 * .
10522 * # Some number of entries towards the end can be nops
10523 * res_n_m3: nop
10524 * res_n_m2: nop
10525 * res_n_m1:
10526 *
10527 * PLTresolve:
10528 * addis 11,11,(1f-res_0)@ha
10529 * mflr 0
10530 * bcl 20,31,1f
10531 * 1: addi 11,11,(1b-res_0)@l
10532 * mflr 12
10533 * mtlr 0
10534 * sub 11,11,12 # r11 = index * 4
10535 * addis 12,12,(got+4-1b)@ha
10536 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10537 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10538 * mtctr 0
10539 * add 0,11,11
10540 * add 11,0,11 # r11 = index * 12 = reloc offset.
10541 * bctr
10542 */
10543 static const unsigned int pic_plt_resolve[] =
10544 {
10545 ADDIS_11_11,
10546 MFLR_0,
10547 BCL_20_31,
10548 ADDI_11_11,
10549 MFLR_12,
10550 MTLR_0,
10551 SUB_11_11_12,
10552 ADDIS_12_12,
10553 LWZ_0_12,
10554 LWZ_12_12,
10555 MTCTR_0,
10556 ADD_0_11_11,
10557 ADD_11_0_11,
10558 BCTR,
10559 NOP,
10560 NOP
10561 };
10562
10563 /*
10564 * Non-PIC glink code is a little simpler.
10565 *
10566 * # ith PLT code stub.
10567 * lis 11,(plt+(i-1)*4)@ha
10568 * lwz 11,(plt+(i-1)*4)@l(11)
10569 * mtctr 11
10570 * bctr
10571 *
10572 * The branch table is the same, then comes
10573 *
10574 * PLTresolve:
10575 * lis 12,(got+4)@ha
10576 * addis 11,11,(-res_0)@ha
10577 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10578 * addi 11,11,(-res_0)@l # r11 = index * 4
10579 * mtctr 0
10580 * add 0,11,11
10581 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10582 * add 11,0,11 # r11 = index * 12 = reloc offset.
10583 * bctr
10584 */
10585 static const unsigned int plt_resolve[] =
10586 {
10587 LIS_12,
10588 ADDIS_11_11,
10589 LWZ_0_12,
10590 ADDI_11_11,
10591 MTCTR_0,
10592 ADD_0_11_11,
10593 LWZ_12_12,
10594 ADD_11_0_11,
10595 BCTR,
10596 NOP,
10597 NOP,
10598 NOP,
10599 NOP,
10600 NOP,
10601 NOP,
10602 NOP
10603 };
10604
10605 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10606 abort ();
10607 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10608 abort ();
10609
10610 /* Build the branch table, one for each plt entry (less one),
10611 and perhaps some padding. */
10612 p = htab->glink->contents;
10613 p += htab->glink_pltresolve;
10614 endp = htab->glink->contents;
10615 endp += htab->glink->size - GLINK_PLTRESOLVE;
10616 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10617 {
10618 bfd_put_32 (output_bfd, B + endp - p, p);
10619 p += 4;
10620 }
10621 while (p < endp)
10622 {
10623 bfd_put_32 (output_bfd, NOP, p);
10624 p += 4;
10625 }
10626
10627 res0 = (htab->glink_pltresolve
10628 + htab->glink->output_section->vma
10629 + htab->glink->output_offset);
10630
10631 if (htab->params->ppc476_workaround)
10632 {
10633 /* Ensure that a call stub at the end of a page doesn't
10634 result in prefetch over the end of the page into the
10635 glink branch table. */
10636 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10637 bfd_vma page_addr;
10638 bfd_vma glink_start = (htab->glink->output_section->vma
10639 + htab->glink->output_offset);
10640
10641 for (page_addr = res0 & -pagesize;
10642 page_addr > glink_start;
10643 page_addr -= pagesize)
10644 {
10645 /* We have a plt call stub that may need fixing. */
10646 bfd_byte *loc;
10647 unsigned int insn;
10648
10649 loc = htab->glink->contents + page_addr - 4 - glink_start;
10650 insn = bfd_get_32 (output_bfd, loc);
10651 if (insn == BCTR)
10652 {
10653 /* By alignment, we know that there must be at least
10654 one other call stub before this one. */
10655 insn = bfd_get_32 (output_bfd, loc - 16);
10656 if (insn == BCTR)
10657 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10658 else
10659 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10660 }
10661 }
10662 }
10663
10664 /* Last comes the PLTresolve stub. */
10665 if (bfd_link_pic (info))
10666 {
10667 bfd_vma bcl;
10668
10669 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10670 {
10671 unsigned int insn = pic_plt_resolve[i];
10672
10673 if (htab->params->ppc476_workaround && insn == NOP)
10674 insn = BA + 0;
10675 bfd_put_32 (output_bfd, insn, p);
10676 p += 4;
10677 }
10678 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10679
10680 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10681 + htab->glink->output_section->vma
10682 + htab->glink->output_offset);
10683
10684 bfd_put_32 (output_bfd,
10685 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10686 bfd_put_32 (output_bfd,
10687 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10688 bfd_put_32 (output_bfd,
10689 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10690 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10691 {
10692 bfd_put_32 (output_bfd,
10693 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10694 bfd_put_32 (output_bfd,
10695 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10696 }
10697 else
10698 {
10699 bfd_put_32 (output_bfd,
10700 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10701 bfd_put_32 (output_bfd,
10702 LWZ_12_12 + 4, p + 9*4);
10703 }
10704 }
10705 else
10706 {
10707 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10708 {
10709 unsigned int insn = plt_resolve[i];
10710
10711 if (htab->params->ppc476_workaround && insn == NOP)
10712 insn = BA + 0;
10713 bfd_put_32 (output_bfd, insn, p);
10714 p += 4;
10715 }
10716 p -= 4 * ARRAY_SIZE (plt_resolve);
10717
10718 bfd_put_32 (output_bfd,
10719 LIS_12 + PPC_HA (got + 4), p + 0*4);
10720 bfd_put_32 (output_bfd,
10721 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10722 bfd_put_32 (output_bfd,
10723 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10724 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10725 {
10726 bfd_put_32 (output_bfd,
10727 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10728 bfd_put_32 (output_bfd,
10729 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10730 }
10731 else
10732 {
10733 bfd_put_32 (output_bfd,
10734 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10735 bfd_put_32 (output_bfd,
10736 LWZ_12_12 + 4, p + 6*4);
10737 }
10738 }
10739 }
10740
10741 if (htab->glink_eh_frame != NULL
10742 && htab->glink_eh_frame->contents != NULL)
10743 {
10744 unsigned char *p = htab->glink_eh_frame->contents;
10745 bfd_vma val;
10746
10747 p += sizeof (glink_eh_frame_cie);
10748 /* FDE length. */
10749 p += 4;
10750 /* CIE pointer. */
10751 p += 4;
10752 /* Offset to .glink. */
10753 val = (htab->glink->output_section->vma
10754 + htab->glink->output_offset);
10755 val -= (htab->glink_eh_frame->output_section->vma
10756 + htab->glink_eh_frame->output_offset);
10757 val -= p - htab->glink_eh_frame->contents;
10758 bfd_put_32 (htab->elf.dynobj, val, p);
10759
10760 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10761 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10762 htab->glink_eh_frame,
10763 htab->glink_eh_frame->contents))
10764 return FALSE;
10765 }
10766
10767 return ret;
10768 }
10769 \f
10770 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10771 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10772 #define TARGET_BIG_SYM powerpc_elf32_vec
10773 #define TARGET_BIG_NAME "elf32-powerpc"
10774 #define ELF_ARCH bfd_arch_powerpc
10775 #define ELF_TARGET_ID PPC32_ELF_DATA
10776 #define ELF_MACHINE_CODE EM_PPC
10777 #ifdef __QNXTARGET__
10778 #define ELF_MAXPAGESIZE 0x1000
10779 #define ELF_COMMONPAGESIZE 0x1000
10780 #else
10781 #define ELF_MAXPAGESIZE 0x10000
10782 #define ELF_COMMONPAGESIZE 0x10000
10783 #endif
10784 #define ELF_MINPAGESIZE 0x1000
10785 #define elf_info_to_howto ppc_elf_info_to_howto
10786
10787 #ifdef EM_CYGNUS_POWERPC
10788 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10789 #endif
10790
10791 #ifdef EM_PPC_OLD
10792 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10793 #endif
10794
10795 #define elf_backend_plt_not_loaded 1
10796 #define elf_backend_want_dynrelro 1
10797 #define elf_backend_can_gc_sections 1
10798 #define elf_backend_can_refcount 1
10799 #define elf_backend_rela_normal 1
10800 #define elf_backend_caches_rawsize 1
10801
10802 #define bfd_elf32_mkobject ppc_elf_mkobject
10803 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10804 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10805 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10806 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10807 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10808 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10809 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10810
10811 #define elf_backend_object_p ppc_elf_object_p
10812 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10813 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10814 #define elf_backend_relocate_section ppc_elf_relocate_section
10815 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10816 #define elf_backend_check_relocs ppc_elf_check_relocs
10817 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10818 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10819 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10820 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10821 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10822 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10823 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10824 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10825 #define elf_backend_fake_sections ppc_elf_fake_sections
10826 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10827 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10828 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10829 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10830 #define elf_backend_write_core_note ppc_elf_write_core_note
10831 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10832 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10833 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10834 #define elf_backend_write_section ppc_elf_write_section
10835 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10836 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10837 #define elf_backend_action_discarded ppc_elf_action_discarded
10838 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10839 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10840
10841 #include "elf32-target.h"
10842
10843 /* FreeBSD Target */
10844
10845 #undef TARGET_LITTLE_SYM
10846 #undef TARGET_LITTLE_NAME
10847
10848 #undef TARGET_BIG_SYM
10849 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10850 #undef TARGET_BIG_NAME
10851 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10852
10853 #undef ELF_OSABI
10854 #define ELF_OSABI ELFOSABI_FREEBSD
10855
10856 #undef elf32_bed
10857 #define elf32_bed elf32_powerpc_fbsd_bed
10858
10859 #include "elf32-target.h"
10860
10861 /* VxWorks Target */
10862
10863 #undef TARGET_LITTLE_SYM
10864 #undef TARGET_LITTLE_NAME
10865
10866 #undef TARGET_BIG_SYM
10867 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10868 #undef TARGET_BIG_NAME
10869 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10870
10871 #undef ELF_OSABI
10872
10873 /* VxWorks uses the elf default section flags for .plt. */
10874 static const struct bfd_elf_special_section *
10875 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10876 {
10877 if (sec->name == NULL)
10878 return NULL;
10879
10880 if (strcmp (sec->name, ".plt") == 0)
10881 return _bfd_elf_get_sec_type_attr (abfd, sec);
10882
10883 return ppc_elf_get_sec_type_attr (abfd, sec);
10884 }
10885
10886 /* Like ppc_elf_link_hash_table_create, but overrides
10887 appropriately for VxWorks. */
10888 static struct bfd_link_hash_table *
10889 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10890 {
10891 struct bfd_link_hash_table *ret;
10892
10893 ret = ppc_elf_link_hash_table_create (abfd);
10894 if (ret)
10895 {
10896 struct ppc_elf_link_hash_table *htab
10897 = (struct ppc_elf_link_hash_table *)ret;
10898 htab->is_vxworks = 1;
10899 htab->plt_type = PLT_VXWORKS;
10900 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10901 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10902 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10903 }
10904 return ret;
10905 }
10906
10907 /* Tweak magic VxWorks symbols as they are loaded. */
10908 static bfd_boolean
10909 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10910 struct bfd_link_info *info,
10911 Elf_Internal_Sym *sym,
10912 const char **namep,
10913 flagword *flagsp,
10914 asection **secp,
10915 bfd_vma *valp)
10916 {
10917 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10918 valp))
10919 return FALSE;
10920
10921 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10922 }
10923
10924 static void
10925 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10926 {
10927 ppc_elf_final_write_processing (abfd, linker);
10928 elf_vxworks_final_write_processing (abfd, linker);
10929 }
10930
10931 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10932 define it. */
10933 #undef elf_backend_want_plt_sym
10934 #define elf_backend_want_plt_sym 1
10935 #undef elf_backend_want_got_plt
10936 #define elf_backend_want_got_plt 1
10937 #undef elf_backend_got_symbol_offset
10938 #define elf_backend_got_symbol_offset 0
10939 #undef elf_backend_plt_not_loaded
10940 #define elf_backend_plt_not_loaded 0
10941 #undef elf_backend_plt_readonly
10942 #define elf_backend_plt_readonly 1
10943 #undef elf_backend_got_header_size
10944 #define elf_backend_got_header_size 12
10945 #undef elf_backend_dtrel_excludes_plt
10946 #define elf_backend_dtrel_excludes_plt 1
10947
10948 #undef bfd_elf32_get_synthetic_symtab
10949
10950 #undef bfd_elf32_bfd_link_hash_table_create
10951 #define bfd_elf32_bfd_link_hash_table_create \
10952 ppc_elf_vxworks_link_hash_table_create
10953 #undef elf_backend_add_symbol_hook
10954 #define elf_backend_add_symbol_hook \
10955 ppc_elf_vxworks_add_symbol_hook
10956 #undef elf_backend_link_output_symbol_hook
10957 #define elf_backend_link_output_symbol_hook \
10958 elf_vxworks_link_output_symbol_hook
10959 #undef elf_backend_final_write_processing
10960 #define elf_backend_final_write_processing \
10961 ppc_elf_vxworks_final_write_processing
10962 #undef elf_backend_get_sec_type_attr
10963 #define elf_backend_get_sec_type_attr \
10964 ppc_elf_vxworks_get_sec_type_attr
10965 #undef elf_backend_emit_relocs
10966 #define elf_backend_emit_relocs \
10967 elf_vxworks_emit_relocs
10968
10969 #undef elf32_bed
10970 #define elf32_bed ppc_elf_vxworks_bed
10971 #undef elf_backend_post_process_headers
10972
10973 #include "elf32-target.h"
GDB Binutils - Deliverables
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