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[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable hierarchy. */
1750 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTINHERIT", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable member usage. */
1765 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTENTRY", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* Phony reloc to handle AIX style TOC entries. */
1780 HOWTO (R_PPC_TOC16, /* type */
1781 0, /* rightshift */
1782 1, /* size (0 = byte, 1 = short, 2 = long) */
1783 16, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_signed, /* complain_on_overflow */
1787 ppc_elf_unhandled_reloc, /* special_function */
1788 "R_PPC_TOC16", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0xffff, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793 };
1794
1795 /* External 32-bit PPC structure for PRPSINFO. This structure is
1796 ABI-defined, thus we choose to use char arrays here in order to
1797 avoid dealing with different types in different architectures.
1798
1799 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1800 most non-PPC architectures use `short int'.
1801
1802 This structure will ultimately be written in the corefile's note
1803 section, as the PRPSINFO. */
1804
1805 struct elf_external_ppc_linux_prpsinfo32
1806 {
1807 char pr_state; /* Numeric process state. */
1808 char pr_sname; /* Char for pr_state. */
1809 char pr_zomb; /* Zombie. */
1810 char pr_nice; /* Nice val. */
1811 char pr_flag[4]; /* Flags. */
1812 char pr_uid[4];
1813 char pr_gid[4];
1814 char pr_pid[4];
1815 char pr_ppid[4];
1816 char pr_pgrp[4];
1817 char pr_sid[4];
1818 char pr_fname[16]; /* Filename of executable. */
1819 char pr_psargs[80]; /* Initial part of arg list. */
1820 };
1821
1822 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1823 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1824
1825 static inline void
1826 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1827 const struct elf_internal_linux_prpsinfo *from,
1828 struct elf_external_ppc_linux_prpsinfo32 *to)
1829 {
1830 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1831 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1832 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1833 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1834 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1835 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1836 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1837 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1838 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1839 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1840 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1841 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1842 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1843 }
1844 \f
1845 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1846
1847 static void
1848 ppc_elf_howto_init (void)
1849 {
1850 unsigned int i, type;
1851
1852 for (i = 0;
1853 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1854 i++)
1855 {
1856 type = ppc_elf_howto_raw[i].type;
1857 if (type >= (sizeof (ppc_elf_howto_table)
1858 / sizeof (ppc_elf_howto_table[0])))
1859 abort ();
1860 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1861 }
1862 }
1863
1864 static reloc_howto_type *
1865 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1866 bfd_reloc_code_real_type code)
1867 {
1868 enum elf_ppc_reloc_type r;
1869
1870 /* Initialize howto table if not already done. */
1871 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1872 ppc_elf_howto_init ();
1873
1874 switch (code)
1875 {
1876 default:
1877 return NULL;
1878
1879 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1880 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1881 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1882 case BFD_RELOC_PPC64_ADDR16_DS:
1883 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1884 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1885 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1886 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1887 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1888 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1889 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1890 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1891 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1892 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1893 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1894 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1895 case BFD_RELOC_PPC64_GOT16_DS:
1896 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1897 case BFD_RELOC_PPC64_GOT16_LO_DS:
1898 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1899 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1900 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1901 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1902 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1903 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1904 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1905 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1906 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1907 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1908 case BFD_RELOC_PPC64_PLT16_LO_DS:
1909 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1910 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1911 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1912 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1913 case BFD_RELOC_PPC64_SECTOFF_DS:
1914 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1915 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1916 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1917 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1918 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1919 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1920 case BFD_RELOC_PPC64_TOC16_DS:
1921 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1922 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1923 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1924 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1925 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1926 case BFD_RELOC_PPC64_TPREL16_DS:
1927 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1928 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1929 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1933 case BFD_RELOC_PPC64_DTPREL16_DS:
1934 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1935 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1936 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1937 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1938 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1939 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1943 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1947 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1951 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1955 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1956 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1960 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1961 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1963 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1964 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1965 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1966 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1967 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1969 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1970 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1971 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1972 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1973 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1974 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1975 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1976 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1977 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1978 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1979 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1980 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1981 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1982 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1983 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1984 r = R_PPC_VLE_SDAREL_LO16A;
1985 break;
1986 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1987 r = R_PPC_VLE_SDAREL_LO16D;
1988 break;
1989 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1990 r = R_PPC_VLE_SDAREL_HI16A;
1991 break;
1992 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1993 r = R_PPC_VLE_SDAREL_HI16D;
1994 break;
1995 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1996 r = R_PPC_VLE_SDAREL_HA16A;
1997 break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1999 r = R_PPC_VLE_SDAREL_HA16D;
2000 break;
2001 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2002 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2003 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2004 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2005 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2006 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2007 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2008 }
2009
2010 return ppc_elf_howto_table[r];
2011 };
2012
2013 static reloc_howto_type *
2014 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2015 const char *r_name)
2016 {
2017 unsigned int i;
2018
2019 for (i = 0;
2020 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2021 i++)
2022 if (ppc_elf_howto_raw[i].name != NULL
2023 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2024 return &ppc_elf_howto_raw[i];
2025
2026 return NULL;
2027 }
2028
2029 /* Set the howto pointer for a PowerPC ELF reloc. */
2030
2031 static void
2032 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2033 arelent *cache_ptr,
2034 Elf_Internal_Rela *dst)
2035 {
2036 unsigned int r_type;
2037
2038 /* Initialize howto table if not already done. */
2039 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2040 ppc_elf_howto_init ();
2041
2042 r_type = ELF32_R_TYPE (dst->r_info);
2043 if (r_type >= R_PPC_max)
2044 {
2045 /* xgettext:c-format */
2046 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2047 abfd, r_type);
2048 bfd_set_error (bfd_error_bad_value);
2049 r_type = R_PPC_NONE;
2050 }
2051 cache_ptr->howto = ppc_elf_howto_table[r_type];
2052
2053 /* Just because the above assert didn't trigger doesn't mean that
2054 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2055 if (!cache_ptr->howto)
2056 {
2057 /* xgettext:c-format */
2058 _bfd_error_handler (_("%B: invalid relocation type %d"),
2059 abfd, r_type);
2060 bfd_set_error (bfd_error_bad_value);
2061
2062 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2063 }
2064 }
2065
2066 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2067
2068 static bfd_reloc_status_type
2069 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2070 arelent *reloc_entry,
2071 asymbol *symbol,
2072 void *data ATTRIBUTE_UNUSED,
2073 asection *input_section,
2074 bfd *output_bfd,
2075 char **error_message ATTRIBUTE_UNUSED)
2076 {
2077 enum elf_ppc_reloc_type r_type;
2078 long insn;
2079 bfd_size_type octets;
2080 bfd_vma value;
2081
2082 if (output_bfd != NULL)
2083 {
2084 reloc_entry->address += input_section->output_offset;
2085 return bfd_reloc_ok;
2086 }
2087
2088 reloc_entry->addend += 0x8000;
2089 r_type = reloc_entry->howto->type;
2090 if (r_type != R_PPC_REL16DX_HA)
2091 return bfd_reloc_continue;
2092
2093 value = 0;
2094 if (!bfd_is_com_section (symbol->section))
2095 value = symbol->value;
2096 value += (reloc_entry->addend
2097 + symbol->section->output_offset
2098 + symbol->section->output_section->vma);
2099 value -= (reloc_entry->address
2100 + input_section->output_offset
2101 + input_section->output_section->vma);
2102 value >>= 16;
2103
2104 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2105 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2106 insn &= ~0x1fffc1;
2107 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2108 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2109 return bfd_reloc_ok;
2110 }
2111
2112 static bfd_reloc_status_type
2113 ppc_elf_unhandled_reloc (bfd *abfd,
2114 arelent *reloc_entry,
2115 asymbol *symbol,
2116 void *data,
2117 asection *input_section,
2118 bfd *output_bfd,
2119 char **error_message)
2120 {
2121 /* If this is a relocatable link (output_bfd test tells us), just
2122 call the generic function. Any adjustment will be done at final
2123 link time. */
2124 if (output_bfd != NULL)
2125 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2126 input_section, output_bfd, error_message);
2127
2128 if (error_message != NULL)
2129 {
2130 static char buf[60];
2131 sprintf (buf, _("generic linker can't handle %s"),
2132 reloc_entry->howto->name);
2133 *error_message = buf;
2134 }
2135 return bfd_reloc_dangerous;
2136 }
2137 \f
2138 /* Sections created by the linker. */
2139
2140 typedef struct elf_linker_section
2141 {
2142 /* Pointer to the bfd section. */
2143 asection *section;
2144 /* Section name. */
2145 const char *name;
2146 /* Associated bss section name. */
2147 const char *bss_name;
2148 /* Associated symbol name. */
2149 const char *sym_name;
2150 /* Associated symbol. */
2151 struct elf_link_hash_entry *sym;
2152 } elf_linker_section_t;
2153
2154 /* Linked list of allocated pointer entries. This hangs off of the
2155 symbol lists, and provides allows us to return different pointers,
2156 based on different addend's. */
2157
2158 typedef struct elf_linker_section_pointers
2159 {
2160 /* next allocated pointer for this symbol */
2161 struct elf_linker_section_pointers *next;
2162 /* offset of pointer from beginning of section */
2163 bfd_vma offset;
2164 /* addend used */
2165 bfd_vma addend;
2166 /* which linker section this is */
2167 elf_linker_section_t *lsect;
2168 } elf_linker_section_pointers_t;
2169
2170 struct ppc_elf_obj_tdata
2171 {
2172 struct elf_obj_tdata elf;
2173
2174 /* A mapping from local symbols to offsets into the various linker
2175 sections added. This is index by the symbol index. */
2176 elf_linker_section_pointers_t **linker_section_pointers;
2177
2178 /* Flags used to auto-detect plt type. */
2179 unsigned int makes_plt_call : 1;
2180 unsigned int has_rel16 : 1;
2181 };
2182
2183 #define ppc_elf_tdata(bfd) \
2184 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2185
2186 #define elf_local_ptr_offsets(bfd) \
2187 (ppc_elf_tdata (bfd)->linker_section_pointers)
2188
2189 #define is_ppc_elf(bfd) \
2190 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2191 && elf_object_id (bfd) == PPC32_ELF_DATA)
2192
2193 /* Override the generic function because we store some extras. */
2194
2195 static bfd_boolean
2196 ppc_elf_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2199 PPC32_ELF_DATA);
2200 }
2201
2202 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2203
2204 bfd_boolean
2205 _bfd_elf_ppc_set_arch (bfd *abfd)
2206 {
2207 unsigned long mach = 0;
2208 asection *s;
2209 unsigned char *contents;
2210
2211 if (abfd->arch_info->bits_per_word == 32
2212 && bfd_big_endian (abfd))
2213 {
2214
2215 for (s = abfd->sections; s != NULL; s = s->next)
2216 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2217 break;
2218 if (s != NULL)
2219 mach = bfd_mach_ppc_vle;
2220 }
2221
2222 if (mach == 0)
2223 {
2224 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2225 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2226 {
2227 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2228 unsigned int i;
2229
2230 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2231 {
2232 unsigned int val = bfd_get_32 (abfd, contents + i);
2233 switch (val >> 16)
2234 {
2235 case PPC_APUINFO_PMR:
2236 case PPC_APUINFO_RFMCI:
2237 if (mach == 0)
2238 mach = bfd_mach_ppc_titan;
2239 break;
2240
2241 case PPC_APUINFO_ISEL:
2242 case PPC_APUINFO_CACHELCK:
2243 if (mach == bfd_mach_ppc_titan)
2244 mach = bfd_mach_ppc_e500mc;
2245 break;
2246
2247 case PPC_APUINFO_SPE:
2248 case PPC_APUINFO_EFS:
2249 case PPC_APUINFO_BRLOCK:
2250 if (mach != bfd_mach_ppc_vle)
2251 mach = bfd_mach_ppc_e500;
2252 break;
2253
2254 case PPC_APUINFO_VLE:
2255 mach = bfd_mach_ppc_vle;
2256 break;
2257
2258 default:
2259 mach = -1ul;
2260 }
2261 }
2262 free (contents);
2263 }
2264 }
2265
2266 if (mach != 0 && mach != -1ul)
2267 {
2268 const bfd_arch_info_type *arch;
2269
2270 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2271 if (arch->mach == mach)
2272 {
2273 abfd->arch_info = arch;
2274 break;
2275 }
2276 }
2277 return TRUE;
2278 }
2279
2280 /* Fix bad default arch selected for a 32 bit input bfd when the
2281 default is 64 bit. Also select arch based on apuinfo. */
2282
2283 static bfd_boolean
2284 ppc_elf_object_p (bfd *abfd)
2285 {
2286 if (!abfd->arch_info->the_default)
2287 return TRUE;
2288
2289 if (abfd->arch_info->bits_per_word == 64)
2290 {
2291 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2292
2293 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2294 {
2295 /* Relies on arch after 64 bit default being 32 bit default. */
2296 abfd->arch_info = abfd->arch_info->next;
2297 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2298 }
2299 }
2300 return _bfd_elf_ppc_set_arch (abfd);
2301 }
2302
2303 /* Function to set whether a module needs the -mrelocatable bit set. */
2304
2305 static bfd_boolean
2306 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2307 {
2308 BFD_ASSERT (!elf_flags_init (abfd)
2309 || elf_elfheader (abfd)->e_flags == flags);
2310
2311 elf_elfheader (abfd)->e_flags = flags;
2312 elf_flags_init (abfd) = TRUE;
2313 return TRUE;
2314 }
2315
2316 /* Support for core dump NOTE sections. */
2317
2318 static bfd_boolean
2319 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2320 {
2321 int offset;
2322 unsigned int size;
2323
2324 switch (note->descsz)
2325 {
2326 default:
2327 return FALSE;
2328
2329 case 268: /* Linux/PPC. */
2330 /* pr_cursig */
2331 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2332
2333 /* pr_pid */
2334 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2335
2336 /* pr_reg */
2337 offset = 72;
2338 size = 192;
2339
2340 break;
2341 }
2342
2343 /* Make a ".reg/999" section. */
2344 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2345 size, note->descpos + offset);
2346 }
2347
2348 static bfd_boolean
2349 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2350 {
2351 switch (note->descsz)
2352 {
2353 default:
2354 return FALSE;
2355
2356 case 128: /* Linux/PPC elf_prpsinfo. */
2357 elf_tdata (abfd)->core->pid
2358 = bfd_get_32 (abfd, note->descdata + 16);
2359 elf_tdata (abfd)->core->program
2360 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2361 elf_tdata (abfd)->core->command
2362 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2363 }
2364
2365 /* Note that for some reason, a spurious space is tacked
2366 onto the end of the args in some (at least one anyway)
2367 implementations, so strip it off if it exists. */
2368
2369 {
2370 char *command = elf_tdata (abfd)->core->command;
2371 int n = strlen (command);
2372
2373 if (0 < n && command[n - 1] == ' ')
2374 command[n - 1] = '\0';
2375 }
2376
2377 return TRUE;
2378 }
2379
2380 char *
2381 elfcore_write_ppc_linux_prpsinfo32
2382 (bfd *abfd,
2383 char *buf,
2384 int *bufsiz,
2385 const struct elf_internal_linux_prpsinfo *prpsinfo)
2386 {
2387 struct elf_external_ppc_linux_prpsinfo32 data;
2388
2389 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2390 return elfcore_write_note (abfd, buf, bufsiz,
2391 "CORE", NT_PRPSINFO, &data, sizeof (data));
2392 }
2393
2394 static char *
2395 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2396 {
2397 switch (note_type)
2398 {
2399 default:
2400 return NULL;
2401
2402 case NT_PRPSINFO:
2403 {
2404 char data[128];
2405 va_list ap;
2406
2407 va_start (ap, note_type);
2408 memset (data, 0, sizeof (data));
2409 strncpy (data + 32, va_arg (ap, const char *), 16);
2410 strncpy (data + 48, va_arg (ap, const char *), 80);
2411 va_end (ap);
2412 return elfcore_write_note (abfd, buf, bufsiz,
2413 "CORE", note_type, data, sizeof (data));
2414 }
2415
2416 case NT_PRSTATUS:
2417 {
2418 char data[268];
2419 va_list ap;
2420 long pid;
2421 int cursig;
2422 const void *greg;
2423
2424 va_start (ap, note_type);
2425 memset (data, 0, 72);
2426 pid = va_arg (ap, long);
2427 bfd_put_32 (abfd, pid, data + 24);
2428 cursig = va_arg (ap, int);
2429 bfd_put_16 (abfd, cursig, data + 12);
2430 greg = va_arg (ap, const void *);
2431 memcpy (data + 72, greg, 192);
2432 memset (data + 264, 0, 4);
2433 va_end (ap);
2434 return elfcore_write_note (abfd, buf, bufsiz,
2435 "CORE", note_type, data, sizeof (data));
2436 }
2437 }
2438 }
2439
2440 static flagword
2441 ppc_elf_lookup_section_flags (char *flag_name)
2442 {
2443
2444 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2445 return SHF_PPC_VLE;
2446
2447 return 0;
2448 }
2449
2450 /* Return address for Ith PLT stub in section PLT, for relocation REL
2451 or (bfd_vma) -1 if it should not be included. */
2452
2453 static bfd_vma
2454 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2455 const asection *plt ATTRIBUTE_UNUSED,
2456 const arelent *rel)
2457 {
2458 return rel->address;
2459 }
2460
2461 /* Handle a PowerPC specific section when reading an object file. This
2462 is called when bfd_section_from_shdr finds a section with an unknown
2463 type. */
2464
2465 static bfd_boolean
2466 ppc_elf_section_from_shdr (bfd *abfd,
2467 Elf_Internal_Shdr *hdr,
2468 const char *name,
2469 int shindex)
2470 {
2471 asection *newsect;
2472 flagword flags;
2473
2474 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2475 return FALSE;
2476
2477 newsect = hdr->bfd_section;
2478 flags = bfd_get_section_flags (abfd, newsect);
2479 if (hdr->sh_flags & SHF_EXCLUDE)
2480 flags |= SEC_EXCLUDE;
2481
2482 if (hdr->sh_type == SHT_ORDERED)
2483 flags |= SEC_SORT_ENTRIES;
2484
2485 bfd_set_section_flags (abfd, newsect, flags);
2486 return TRUE;
2487 }
2488
2489 /* Set up any other section flags and such that may be necessary. */
2490
2491 static bfd_boolean
2492 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2493 Elf_Internal_Shdr *shdr,
2494 asection *asect)
2495 {
2496 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2497 shdr->sh_type = SHT_ORDERED;
2498
2499 return TRUE;
2500 }
2501
2502 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2503 need to bump up the number of section headers. */
2504
2505 static int
2506 ppc_elf_additional_program_headers (bfd *abfd,
2507 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2508 {
2509 asection *s;
2510 int ret = 0;
2511
2512 s = bfd_get_section_by_name (abfd, ".sbss2");
2513 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2514 ++ret;
2515
2516 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2517 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2518 ++ret;
2519
2520 return ret;
2521 }
2522
2523 /* Modify the segment map for VLE executables. */
2524
2525 bfd_boolean
2526 ppc_elf_modify_segment_map (bfd *abfd,
2527 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2528 {
2529 struct elf_segment_map *m;
2530
2531 /* At this point in the link, output sections have already been sorted by
2532 LMA and assigned to segments. All that is left to do is to ensure
2533 there is no mixing of VLE & non-VLE sections in a text segment.
2534 If we find that case, we split the segment.
2535 We maintain the original output section order. */
2536
2537 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2538 {
2539 struct elf_segment_map *n;
2540 bfd_size_type amt;
2541 unsigned int j, k;
2542 unsigned int p_flags;
2543
2544 if (m->p_type != PT_LOAD || m->count == 0)
2545 continue;
2546
2547 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2548 {
2549 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2550 p_flags |= PF_W;
2551 if ((m->sections[j]->flags & SEC_CODE) != 0)
2552 {
2553 p_flags |= PF_X;
2554 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2555 p_flags |= PF_PPC_VLE;
2556 break;
2557 }
2558 }
2559 if (j != m->count)
2560 while (++j != m->count)
2561 {
2562 unsigned int p_flags1 = PF_R;
2563
2564 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2565 p_flags1 |= PF_W;
2566 if ((m->sections[j]->flags & SEC_CODE) != 0)
2567 {
2568 p_flags1 |= PF_X;
2569 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2570 p_flags1 |= PF_PPC_VLE;
2571 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2572 break;
2573 }
2574 p_flags |= p_flags1;
2575 }
2576 /* If we're splitting a segment which originally contained rw
2577 sections then those sections might now only be in one of the
2578 two parts. So always set p_flags if splitting, even if we
2579 are being called for objcopy with p_flags_valid set. */
2580 if (j != m->count || !m->p_flags_valid)
2581 {
2582 m->p_flags_valid = 1;
2583 m->p_flags = p_flags;
2584 }
2585 if (j == m->count)
2586 continue;
2587
2588 /* Sections 0..j-1 stay in this (current) segment,
2589 the remainder are put in a new segment.
2590 The scan resumes with the new segment. */
2591
2592 amt = sizeof (struct elf_segment_map);
2593 amt += (m->count - j - 1) * sizeof (asection *);
2594 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2595 if (n == NULL)
2596 return FALSE;
2597
2598 n->p_type = PT_LOAD;
2599 n->count = m->count - j;
2600 for (k = 0; k < n->count; ++k)
2601 n->sections[k] = m->sections[j + k];
2602 m->count = j;
2603 m->p_size_valid = 0;
2604 n->next = m->next;
2605 m->next = n;
2606 }
2607
2608 return TRUE;
2609 }
2610
2611 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2612 .PPC.EMB.sbss0 a normal section, and not a bss section so
2613 that the linker doesn't crater when trying to make more than
2614 2 sections. */
2615
2616 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2617 {
2618 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2619 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2620 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2621 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2623 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2624 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2625 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2628 };
2629
2630 /* This is what we want for new plt/got. */
2631 static struct bfd_elf_special_section ppc_alt_plt =
2632 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2633
2634 static const struct bfd_elf_special_section *
2635 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2636 {
2637 const struct bfd_elf_special_section *ssect;
2638
2639 /* See if this is one of the special sections. */
2640 if (sec->name == NULL)
2641 return NULL;
2642
2643 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2644 sec->use_rela_p);
2645 if (ssect != NULL)
2646 {
2647 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2648 ssect = &ppc_alt_plt;
2649 return ssect;
2650 }
2651
2652 return _bfd_elf_get_sec_type_attr (abfd, sec);
2653 }
2654 \f
2655 /* Very simple linked list structure for recording apuinfo values. */
2656 typedef struct apuinfo_list
2657 {
2658 struct apuinfo_list *next;
2659 unsigned long value;
2660 }
2661 apuinfo_list;
2662
2663 static apuinfo_list *head;
2664 static bfd_boolean apuinfo_set;
2665
2666 static void
2667 apuinfo_list_init (void)
2668 {
2669 head = NULL;
2670 apuinfo_set = FALSE;
2671 }
2672
2673 static void
2674 apuinfo_list_add (unsigned long value)
2675 {
2676 apuinfo_list *entry = head;
2677
2678 while (entry != NULL)
2679 {
2680 if (entry->value == value)
2681 return;
2682 entry = entry->next;
2683 }
2684
2685 entry = bfd_malloc (sizeof (* entry));
2686 if (entry == NULL)
2687 return;
2688
2689 entry->value = value;
2690 entry->next = head;
2691 head = entry;
2692 }
2693
2694 static unsigned
2695 apuinfo_list_length (void)
2696 {
2697 apuinfo_list *entry;
2698 unsigned long count;
2699
2700 for (entry = head, count = 0;
2701 entry;
2702 entry = entry->next)
2703 ++ count;
2704
2705 return count;
2706 }
2707
2708 static inline unsigned long
2709 apuinfo_list_element (unsigned long number)
2710 {
2711 apuinfo_list * entry;
2712
2713 for (entry = head;
2714 entry && number --;
2715 entry = entry->next)
2716 ;
2717
2718 return entry ? entry->value : 0;
2719 }
2720
2721 static void
2722 apuinfo_list_finish (void)
2723 {
2724 apuinfo_list *entry;
2725
2726 for (entry = head; entry;)
2727 {
2728 apuinfo_list *next = entry->next;
2729 free (entry);
2730 entry = next;
2731 }
2732
2733 head = NULL;
2734 }
2735
2736 /* Scan the input BFDs and create a linked list of
2737 the APUinfo values that will need to be emitted. */
2738
2739 static void
2740 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2741 {
2742 bfd *ibfd;
2743 asection *asec;
2744 char *buffer = NULL;
2745 bfd_size_type largest_input_size = 0;
2746 unsigned i;
2747 unsigned long length;
2748 const char *error_message = NULL;
2749
2750 if (link_info == NULL)
2751 return;
2752
2753 apuinfo_list_init ();
2754
2755 /* Read in the input sections contents. */
2756 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2757 {
2758 unsigned long datum;
2759
2760 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2761 if (asec == NULL)
2762 continue;
2763
2764 /* xgettext:c-format */
2765 error_message = _("corrupt %s section in %B");
2766 length = asec->size;
2767 if (length < 20)
2768 goto fail;
2769
2770 apuinfo_set = TRUE;
2771 if (largest_input_size < asec->size)
2772 {
2773 if (buffer)
2774 free (buffer);
2775 largest_input_size = asec->size;
2776 buffer = bfd_malloc (largest_input_size);
2777 if (!buffer)
2778 return;
2779 }
2780
2781 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2782 || (bfd_bread (buffer, length, ibfd) != length))
2783 {
2784 /* xgettext:c-format */
2785 error_message = _("unable to read in %s section from %B");
2786 goto fail;
2787 }
2788
2789 /* Verify the contents of the header. Note - we have to
2790 extract the values this way in order to allow for a
2791 host whose endian-ness is different from the target. */
2792 datum = bfd_get_32 (ibfd, buffer);
2793 if (datum != sizeof APUINFO_LABEL)
2794 goto fail;
2795
2796 datum = bfd_get_32 (ibfd, buffer + 8);
2797 if (datum != 0x2)
2798 goto fail;
2799
2800 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2801 goto fail;
2802
2803 /* Get the number of bytes used for apuinfo entries. */
2804 datum = bfd_get_32 (ibfd, buffer + 4);
2805 if (datum + 20 != length)
2806 goto fail;
2807
2808 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2809 for (i = 0; i < datum; i += 4)
2810 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2811 }
2812
2813 error_message = NULL;
2814
2815 if (apuinfo_set)
2816 {
2817 /* Compute the size of the output section. */
2818 unsigned num_entries = apuinfo_list_length ();
2819
2820 /* Set the output section size, if it exists. */
2821 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2822
2823 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2824 {
2825 ibfd = abfd;
2826 /* xgettext:c-format */
2827 error_message = _("warning: unable to set size of %s section in %B");
2828 }
2829 }
2830
2831 fail:
2832 if (buffer)
2833 free (buffer);
2834
2835 if (error_message)
2836 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2837 }
2838
2839 /* Prevent the output section from accumulating the input sections'
2840 contents. We have already stored this in our linked list structure. */
2841
2842 static bfd_boolean
2843 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2844 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2845 asection *asec,
2846 bfd_byte *contents ATTRIBUTE_UNUSED)
2847 {
2848 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2849 }
2850
2851 /* Finally we can generate the output section. */
2852
2853 static void
2854 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2855 {
2856 bfd_byte *buffer;
2857 asection *asec;
2858 unsigned i;
2859 unsigned num_entries;
2860 bfd_size_type length;
2861
2862 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2863 if (asec == NULL)
2864 return;
2865
2866 if (!apuinfo_set)
2867 return;
2868
2869 length = asec->size;
2870 if (length < 20)
2871 return;
2872
2873 buffer = bfd_malloc (length);
2874 if (buffer == NULL)
2875 {
2876 _bfd_error_handler
2877 (_("failed to allocate space for new APUinfo section."));
2878 return;
2879 }
2880
2881 /* Create the apuinfo header. */
2882 num_entries = apuinfo_list_length ();
2883 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2884 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2885 bfd_put_32 (abfd, 0x2, buffer + 8);
2886 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2887
2888 length = 20;
2889 for (i = 0; i < num_entries; i++)
2890 {
2891 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2892 length += 4;
2893 }
2894
2895 if (length != asec->size)
2896 _bfd_error_handler (_("failed to compute new APUinfo section."));
2897
2898 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2899 _bfd_error_handler (_("failed to install new APUinfo section."));
2900
2901 free (buffer);
2902
2903 apuinfo_list_finish ();
2904 }
2905 \f
2906 static bfd_boolean
2907 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2908 {
2909 bfd_byte buf[GLINK_ENTRY_SIZE];
2910
2911 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2912 return FALSE;
2913
2914 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2915 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2916 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2917 && bfd_get_32 (abfd, buf + 12) == BCTR);
2918 }
2919
2920 static bfd_boolean
2921 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2922 {
2923 bfd_vma vma = *(bfd_vma *) ptr;
2924 return ((section->flags & SEC_ALLOC) != 0
2925 && section->vma <= vma
2926 && vma < section->vma + section->size);
2927 }
2928
2929 static long
2930 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2931 long dynsymcount, asymbol **dynsyms,
2932 asymbol **ret)
2933 {
2934 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2935 asection *plt, *relplt, *dynamic, *glink;
2936 bfd_vma glink_vma = 0;
2937 bfd_vma resolv_vma = 0;
2938 bfd_vma stub_vma;
2939 asymbol *s;
2940 arelent *p;
2941 long count, i;
2942 size_t size;
2943 char *names;
2944 bfd_byte buf[4];
2945
2946 *ret = NULL;
2947
2948 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2949 return 0;
2950
2951 if (dynsymcount <= 0)
2952 return 0;
2953
2954 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2955 if (relplt == NULL)
2956 return 0;
2957
2958 plt = bfd_get_section_by_name (abfd, ".plt");
2959 if (plt == NULL)
2960 return 0;
2961
2962 /* Call common code to handle old-style executable PLTs. */
2963 if (elf_section_flags (plt) & SHF_EXECINSTR)
2964 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2965 dynsymcount, dynsyms, ret);
2966
2967 /* If this object was prelinked, the prelinker stored the address
2968 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2969 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2970 if (dynamic != NULL)
2971 {
2972 bfd_byte *dynbuf, *extdyn, *extdynend;
2973 size_t extdynsize;
2974 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2975
2976 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2977 return -1;
2978
2979 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2980 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2981
2982 extdyn = dynbuf;
2983 extdynend = extdyn + dynamic->size;
2984 for (; extdyn < extdynend; extdyn += extdynsize)
2985 {
2986 Elf_Internal_Dyn dyn;
2987 (*swap_dyn_in) (abfd, extdyn, &dyn);
2988
2989 if (dyn.d_tag == DT_NULL)
2990 break;
2991
2992 if (dyn.d_tag == DT_PPC_GOT)
2993 {
2994 unsigned int g_o_t = dyn.d_un.d_val;
2995 asection *got = bfd_get_section_by_name (abfd, ".got");
2996 if (got != NULL
2997 && bfd_get_section_contents (abfd, got, buf,
2998 g_o_t - got->vma + 4, 4))
2999 glink_vma = bfd_get_32 (abfd, buf);
3000 break;
3001 }
3002 }
3003 free (dynbuf);
3004 }
3005
3006 /* Otherwise we read the first plt entry. */
3007 if (glink_vma == 0)
3008 {
3009 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3010 glink_vma = bfd_get_32 (abfd, buf);
3011 }
3012
3013 if (glink_vma == 0)
3014 return 0;
3015
3016 /* The .glink section usually does not survive the final
3017 link; search for the section (usually .text) where the
3018 glink stubs now reside. */
3019 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3020 if (glink == NULL)
3021 return 0;
3022
3023 /* Determine glink PLT resolver by reading the relative branch
3024 from the first glink stub. */
3025 if (bfd_get_section_contents (abfd, glink, buf,
3026 glink_vma - glink->vma, 4))
3027 {
3028 unsigned int insn = bfd_get_32 (abfd, buf);
3029
3030 /* The first glink stub may either branch to the resolver ... */
3031 insn ^= B;
3032 if ((insn & ~0x3fffffc) == 0)
3033 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3034
3035 /* ... or fall through a bunch of NOPs. */
3036 else if ((insn ^ B ^ NOP) == 0)
3037 for (i = 4;
3038 bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma + i, 4);
3040 i += 4)
3041 if (bfd_get_32 (abfd, buf) != NOP)
3042 {
3043 resolv_vma = glink_vma + i;
3044 break;
3045 }
3046 }
3047
3048 count = relplt->size / sizeof (Elf32_External_Rela);
3049 /* If the stubs are those for -shared/-pie then we might have
3050 multiple stubs for each plt entry. If that is the case then
3051 there is no way to associate stubs with their plt entries short
3052 of figuring out the GOT pointer value used in the stub. */
3053 if (!is_nonpic_glink_stub (abfd, glink,
3054 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3055 return 0;
3056
3057 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3058 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3059 return -1;
3060
3061 size = count * sizeof (asymbol);
3062 p = relplt->relocation;
3063 for (i = 0; i < count; i++, p++)
3064 {
3065 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3066 if (p->addend != 0)
3067 size += sizeof ("+0x") - 1 + 8;
3068 }
3069
3070 size += sizeof (asymbol) + sizeof ("__glink");
3071
3072 if (resolv_vma)
3073 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3074
3075 s = *ret = bfd_malloc (size);
3076 if (s == NULL)
3077 return -1;
3078
3079 stub_vma = glink_vma;
3080 names = (char *) (s + count + 1 + (resolv_vma != 0));
3081 p = relplt->relocation + count - 1;
3082 for (i = 0; i < count; i++)
3083 {
3084 size_t len;
3085
3086 *s = **p->sym_ptr_ptr;
3087 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3088 we are defining a symbol, ensure one of them is set. */
3089 if ((s->flags & BSF_LOCAL) == 0)
3090 s->flags |= BSF_GLOBAL;
3091 s->flags |= BSF_SYNTHETIC;
3092 s->section = glink;
3093 stub_vma -= 16;
3094 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3095 stub_vma -= 32;
3096 s->value = stub_vma - glink->vma;
3097 s->name = names;
3098 s->udata.p = NULL;
3099 len = strlen ((*p->sym_ptr_ptr)->name);
3100 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3101 names += len;
3102 if (p->addend != 0)
3103 {
3104 memcpy (names, "+0x", sizeof ("+0x") - 1);
3105 names += sizeof ("+0x") - 1;
3106 bfd_sprintf_vma (abfd, names, p->addend);
3107 names += strlen (names);
3108 }
3109 memcpy (names, "@plt", sizeof ("@plt"));
3110 names += sizeof ("@plt");
3111 ++s;
3112 --p;
3113 }
3114
3115 /* Add a symbol at the start of the glink branch table. */
3116 memset (s, 0, sizeof *s);
3117 s->the_bfd = abfd;
3118 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3119 s->section = glink;
3120 s->value = glink_vma - glink->vma;
3121 s->name = names;
3122 memcpy (names, "__glink", sizeof ("__glink"));
3123 names += sizeof ("__glink");
3124 s++;
3125 count++;
3126
3127 if (resolv_vma)
3128 {
3129 /* Add a symbol for the glink PLT resolver. */
3130 memset (s, 0, sizeof *s);
3131 s->the_bfd = abfd;
3132 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3133 s->section = glink;
3134 s->value = resolv_vma - glink->vma;
3135 s->name = names;
3136 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3137 names += sizeof ("__glink_PLTresolve");
3138 s++;
3139 count++;
3140 }
3141
3142 return count;
3143 }
3144 \f
3145 /* The following functions are specific to the ELF linker, while
3146 functions above are used generally. They appear in this file more
3147 or less in the order in which they are called. eg.
3148 ppc_elf_check_relocs is called early in the link process,
3149 ppc_elf_finish_dynamic_sections is one of the last functions
3150 called. */
3151
3152 /* Track PLT entries needed for a given symbol. We might need more
3153 than one glink entry per symbol when generating a pic binary. */
3154 struct plt_entry
3155 {
3156 struct plt_entry *next;
3157
3158 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3159 This field stores the offset into .got2 used to initialise the
3160 GOT pointer reg. It will always be at least 32768. (Current
3161 gcc always uses an offset of 32768, but ld -r will pack .got2
3162 sections together resulting in larger offsets). */
3163 bfd_vma addend;
3164
3165 /* The .got2 section. */
3166 asection *sec;
3167
3168 /* PLT refcount or offset. */
3169 union
3170 {
3171 bfd_signed_vma refcount;
3172 bfd_vma offset;
3173 } plt;
3174
3175 /* .glink stub offset. */
3176 bfd_vma glink_offset;
3177 };
3178
3179 /* Of those relocs that might be copied as dynamic relocs, this function
3180 selects those that must be copied when linking a shared library,
3181 even when the symbol is local. */
3182
3183 static int
3184 must_be_dyn_reloc (struct bfd_link_info *info,
3185 enum elf_ppc_reloc_type r_type)
3186 {
3187 switch (r_type)
3188 {
3189 default:
3190 return 1;
3191
3192 case R_PPC_REL24:
3193 case R_PPC_REL14:
3194 case R_PPC_REL14_BRTAKEN:
3195 case R_PPC_REL14_BRNTAKEN:
3196 case R_PPC_REL32:
3197 return 0;
3198
3199 case R_PPC_TPREL32:
3200 case R_PPC_TPREL16:
3201 case R_PPC_TPREL16_LO:
3202 case R_PPC_TPREL16_HI:
3203 case R_PPC_TPREL16_HA:
3204 return !bfd_link_executable (info);
3205 }
3206 }
3207
3208 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3209 copying dynamic variables from a shared lib into an app's dynbss
3210 section, and instead use a dynamic relocation to point into the
3211 shared lib. */
3212 #define ELIMINATE_COPY_RELOCS 1
3213
3214 /* Used to track dynamic relocations for local symbols. */
3215 struct ppc_dyn_relocs
3216 {
3217 struct ppc_dyn_relocs *next;
3218
3219 /* The input section of the reloc. */
3220 asection *sec;
3221
3222 /* Total number of relocs copied for the input section. */
3223 unsigned int count : 31;
3224
3225 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3226 unsigned int ifunc : 1;
3227 };
3228
3229 /* PPC ELF linker hash entry. */
3230
3231 struct ppc_elf_link_hash_entry
3232 {
3233 struct elf_link_hash_entry elf;
3234
3235 /* If this symbol is used in the linker created sections, the processor
3236 specific backend uses this field to map the field into the offset
3237 from the beginning of the section. */
3238 elf_linker_section_pointers_t *linker_section_pointer;
3239
3240 /* Track dynamic relocs copied for this symbol. */
3241 struct elf_dyn_relocs *dyn_relocs;
3242
3243 /* Contexts in which symbol is used in the GOT (or TOC).
3244 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3245 corresponding relocs are encountered during check_relocs.
3246 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3247 indicate the corresponding GOT entry type is not needed. */
3248 #define TLS_GD 1 /* GD reloc. */
3249 #define TLS_LD 2 /* LD reloc. */
3250 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3251 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3252 #define TLS_TLS 16 /* Any TLS reloc. */
3253 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3254 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3255 char tls_mask;
3256
3257 /* Nonzero if we have seen a small data relocation referring to this
3258 symbol. */
3259 unsigned char has_sda_refs : 1;
3260
3261 /* Flag use of given relocations. */
3262 unsigned char has_addr16_ha : 1;
3263 unsigned char has_addr16_lo : 1;
3264 };
3265
3266 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3267
3268 /* PPC ELF linker hash table. */
3269
3270 struct ppc_elf_link_hash_table
3271 {
3272 struct elf_link_hash_table elf;
3273
3274 /* Various options passed from the linker. */
3275 struct ppc_elf_params *params;
3276
3277 /* Short-cuts to get to dynamic linker sections. */
3278 asection *got;
3279 asection *relgot;
3280 asection *glink;
3281 asection *plt;
3282 asection *relplt;
3283 asection *iplt;
3284 asection *reliplt;
3285 asection *dynbss;
3286 asection *relbss;
3287 asection *dynsbss;
3288 asection *relsbss;
3289 elf_linker_section_t sdata[2];
3290 asection *sbss;
3291 asection *glink_eh_frame;
3292
3293 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3294 asection *srelplt2;
3295
3296 /* The .got.plt section (VxWorks only)*/
3297 asection *sgotplt;
3298
3299 /* Shortcut to __tls_get_addr. */
3300 struct elf_link_hash_entry *tls_get_addr;
3301
3302 /* The bfd that forced an old-style PLT. */
3303 bfd *old_bfd;
3304
3305 /* TLS local dynamic got entry handling. */
3306 union {
3307 bfd_signed_vma refcount;
3308 bfd_vma offset;
3309 } tlsld_got;
3310
3311 /* Offset of branch table to PltResolve function in glink. */
3312 bfd_vma glink_pltresolve;
3313
3314 /* Size of reserved GOT entries. */
3315 unsigned int got_header_size;
3316 /* Non-zero if allocating the header left a gap. */
3317 unsigned int got_gap;
3318
3319 /* The type of PLT we have chosen to use. */
3320 enum ppc_elf_plt_type plt_type;
3321
3322 /* True if the target system is VxWorks. */
3323 unsigned int is_vxworks:1;
3324
3325 /* The size of PLT entries. */
3326 int plt_entry_size;
3327 /* The distance between adjacent PLT slots. */
3328 int plt_slot_size;
3329 /* The size of the first PLT entry. */
3330 int plt_initial_entry_size;
3331
3332 /* Small local sym cache. */
3333 struct sym_cache sym_cache;
3334 };
3335
3336 /* Rename some of the generic section flags to better document how they
3337 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3338
3339 /* Nonzero if this section has TLS related relocations. */
3340 #define has_tls_reloc sec_flg0
3341
3342 /* Nonzero if this section has a call to __tls_get_addr. */
3343 #define has_tls_get_addr_call sec_flg1
3344
3345 /* Get the PPC ELF linker hash table from a link_info structure. */
3346
3347 #define ppc_elf_hash_table(p) \
3348 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3349 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3350
3351 /* Create an entry in a PPC ELF linker hash table. */
3352
3353 static struct bfd_hash_entry *
3354 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3355 struct bfd_hash_table *table,
3356 const char *string)
3357 {
3358 /* Allocate the structure if it has not already been allocated by a
3359 subclass. */
3360 if (entry == NULL)
3361 {
3362 entry = bfd_hash_allocate (table,
3363 sizeof (struct ppc_elf_link_hash_entry));
3364 if (entry == NULL)
3365 return entry;
3366 }
3367
3368 /* Call the allocation method of the superclass. */
3369 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3370 if (entry != NULL)
3371 {
3372 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3373 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3374 ppc_elf_hash_entry (entry)->tls_mask = 0;
3375 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3376 }
3377
3378 return entry;
3379 }
3380
3381 /* Create a PPC ELF linker hash table. */
3382
3383 static struct bfd_link_hash_table *
3384 ppc_elf_link_hash_table_create (bfd *abfd)
3385 {
3386 struct ppc_elf_link_hash_table *ret;
3387 static struct ppc_elf_params default_params
3388 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3389
3390 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3391 if (ret == NULL)
3392 return NULL;
3393
3394 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3395 ppc_elf_link_hash_newfunc,
3396 sizeof (struct ppc_elf_link_hash_entry),
3397 PPC32_ELF_DATA))
3398 {
3399 free (ret);
3400 return NULL;
3401 }
3402
3403 ret->elf.init_plt_refcount.refcount = 0;
3404 ret->elf.init_plt_refcount.glist = NULL;
3405 ret->elf.init_plt_offset.offset = 0;
3406 ret->elf.init_plt_offset.glist = NULL;
3407
3408 ret->params = &default_params;
3409
3410 ret->sdata[0].name = ".sdata";
3411 ret->sdata[0].sym_name = "_SDA_BASE_";
3412 ret->sdata[0].bss_name = ".sbss";
3413
3414 ret->sdata[1].name = ".sdata2";
3415 ret->sdata[1].sym_name = "_SDA2_BASE_";
3416 ret->sdata[1].bss_name = ".sbss2";
3417
3418 ret->plt_entry_size = 12;
3419 ret->plt_slot_size = 8;
3420 ret->plt_initial_entry_size = 72;
3421
3422 return &ret->elf.root;
3423 }
3424
3425 /* Hook linker params into hash table. */
3426
3427 void
3428 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3429 {
3430 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3431
3432 if (htab)
3433 htab->params = params;
3434 params->pagesize_p2 = bfd_log2 (params->pagesize);
3435 }
3436
3437 /* Create .got and the related sections. */
3438
3439 static bfd_boolean
3440 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3441 {
3442 struct ppc_elf_link_hash_table *htab;
3443 asection *s;
3444 flagword flags;
3445
3446 if (!_bfd_elf_create_got_section (abfd, info))
3447 return FALSE;
3448
3449 htab = ppc_elf_hash_table (info);
3450 htab->got = s = bfd_get_linker_section (abfd, ".got");
3451 if (s == NULL)
3452 abort ();
3453
3454 if (htab->is_vxworks)
3455 {
3456 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3457 if (!htab->sgotplt)
3458 abort ();
3459 }
3460 else
3461 {
3462 /* The powerpc .got has a blrl instruction in it. Mark it
3463 executable. */
3464 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3465 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3466 if (!bfd_set_section_flags (abfd, s, flags))
3467 return FALSE;
3468 }
3469
3470 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3471 if (!htab->relgot)
3472 abort ();
3473
3474 return TRUE;
3475 }
3476
3477 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3478 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3479 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3480
3481 static bfd_boolean
3482 ppc_elf_create_linker_section (bfd *abfd,
3483 struct bfd_link_info *info,
3484 flagword flags,
3485 elf_linker_section_t *lsect)
3486 {
3487 asection *s;
3488
3489 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3490 | SEC_LINKER_CREATED);
3491
3492 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3493 if (s == NULL)
3494 return FALSE;
3495 lsect->section = s;
3496
3497 /* Define the sym on the first section of this name. */
3498 s = bfd_get_section_by_name (abfd, lsect->name);
3499
3500 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3501 if (lsect->sym == NULL)
3502 return FALSE;
3503 lsect->sym->root.u.def.value = 0x8000;
3504 return TRUE;
3505 }
3506
3507 static bfd_boolean
3508 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3509 {
3510 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3511 asection *s;
3512 flagword flags;
3513
3514 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3516 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3517 htab->glink = s;
3518 if (s == NULL
3519 || !bfd_set_section_alignment (abfd, s,
3520 htab->params->ppc476_workaround ? 6 : 4))
3521 return FALSE;
3522
3523 if (!info->no_ld_generated_unwind_info)
3524 {
3525 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3526 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3527 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3528 htab->glink_eh_frame = s;
3529 if (s == NULL
3530 || !bfd_set_section_alignment (abfd, s, 2))
3531 return FALSE;
3532 }
3533
3534 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3535 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3536 htab->iplt = s;
3537 if (s == NULL
3538 || !bfd_set_section_alignment (abfd, s, 4))
3539 return FALSE;
3540
3541 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3542 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3543 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3544 htab->reliplt = s;
3545 if (s == NULL
3546 || ! bfd_set_section_alignment (abfd, s, 2))
3547 return FALSE;
3548
3549 if (!ppc_elf_create_linker_section (abfd, info, 0,
3550 &htab->sdata[0]))
3551 return FALSE;
3552
3553 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3554 &htab->sdata[1]))
3555 return FALSE;
3556
3557 return TRUE;
3558 }
3559
3560 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3561 to output sections (just like _bfd_elf_create_dynamic_sections has
3562 to create .dynbss and .rela.bss). */
3563
3564 static bfd_boolean
3565 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3566 {
3567 struct ppc_elf_link_hash_table *htab;
3568 asection *s;
3569 flagword flags;
3570
3571 htab = ppc_elf_hash_table (info);
3572
3573 if (htab->got == NULL
3574 && !ppc_elf_create_got (abfd, info))
3575 return FALSE;
3576
3577 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3578 return FALSE;
3579
3580 if (htab->glink == NULL
3581 && !ppc_elf_create_glink (abfd, info))
3582 return FALSE;
3583
3584 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3585 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3586 SEC_ALLOC | SEC_LINKER_CREATED);
3587 htab->dynsbss = s;
3588 if (s == NULL)
3589 return FALSE;
3590
3591 if (! bfd_link_pic (info))
3592 {
3593 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3594 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3595 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3596 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3597 htab->relsbss = s;
3598 if (s == NULL
3599 || ! bfd_set_section_alignment (abfd, s, 2))
3600 return FALSE;
3601 }
3602
3603 if (htab->is_vxworks
3604 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3605 return FALSE;
3606
3607 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3608 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3609 if (s == NULL)
3610 abort ();
3611
3612 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3613 if (htab->plt_type == PLT_VXWORKS)
3614 /* The VxWorks PLT is a loaded section with contents. */
3615 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3616 return bfd_set_section_flags (abfd, s, flags);
3617 }
3618
3619 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3620
3621 static void
3622 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3623 struct elf_link_hash_entry *dir,
3624 struct elf_link_hash_entry *ind)
3625 {
3626 struct ppc_elf_link_hash_entry *edir, *eind;
3627
3628 edir = (struct ppc_elf_link_hash_entry *) dir;
3629 eind = (struct ppc_elf_link_hash_entry *) ind;
3630
3631 edir->tls_mask |= eind->tls_mask;
3632 edir->has_sda_refs |= eind->has_sda_refs;
3633
3634 /* If called to transfer flags for a weakdef during processing
3635 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3636 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3637 if (!(ELIMINATE_COPY_RELOCS
3638 && eind->elf.root.type != bfd_link_hash_indirect
3639 && edir->elf.dynamic_adjusted))
3640 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3641
3642 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3643 edir->elf.ref_regular |= eind->elf.ref_regular;
3644 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3645 edir->elf.needs_plt |= eind->elf.needs_plt;
3646 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3647
3648 if (eind->dyn_relocs != NULL)
3649 {
3650 if (edir->dyn_relocs != NULL)
3651 {
3652 struct elf_dyn_relocs **pp;
3653 struct elf_dyn_relocs *p;
3654
3655 /* Add reloc counts against the indirect sym to the direct sym
3656 list. Merge any entries against the same section. */
3657 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3658 {
3659 struct elf_dyn_relocs *q;
3660
3661 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3662 if (q->sec == p->sec)
3663 {
3664 q->pc_count += p->pc_count;
3665 q->count += p->count;
3666 *pp = p->next;
3667 break;
3668 }
3669 if (q == NULL)
3670 pp = &p->next;
3671 }
3672 *pp = edir->dyn_relocs;
3673 }
3674
3675 edir->dyn_relocs = eind->dyn_relocs;
3676 eind->dyn_relocs = NULL;
3677 }
3678
3679 /* If we were called to copy over info for a weak sym, that's all.
3680 You might think dyn_relocs need not be copied over; After all,
3681 both syms will be dynamic or both non-dynamic so we're just
3682 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3683 code in ppc_elf_adjust_dynamic_symbol needs to check for
3684 dyn_relocs in read-only sections, and it does so on what is the
3685 DIR sym here. */
3686 if (eind->elf.root.type != bfd_link_hash_indirect)
3687 return;
3688
3689 /* Copy over the GOT refcount entries that we may have already seen to
3690 the symbol which just became indirect. */
3691 edir->elf.got.refcount += eind->elf.got.refcount;
3692 eind->elf.got.refcount = 0;
3693
3694 /* And plt entries. */
3695 if (eind->elf.plt.plist != NULL)
3696 {
3697 if (edir->elf.plt.plist != NULL)
3698 {
3699 struct plt_entry **entp;
3700 struct plt_entry *ent;
3701
3702 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3703 {
3704 struct plt_entry *dent;
3705
3706 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3707 if (dent->sec == ent->sec && dent->addend == ent->addend)
3708 {
3709 dent->plt.refcount += ent->plt.refcount;
3710 *entp = ent->next;
3711 break;
3712 }
3713 if (dent == NULL)
3714 entp = &ent->next;
3715 }
3716 *entp = edir->elf.plt.plist;
3717 }
3718
3719 edir->elf.plt.plist = eind->elf.plt.plist;
3720 eind->elf.plt.plist = NULL;
3721 }
3722
3723 if (eind->elf.dynindx != -1)
3724 {
3725 if (edir->elf.dynindx != -1)
3726 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3727 edir->elf.dynstr_index);
3728 edir->elf.dynindx = eind->elf.dynindx;
3729 edir->elf.dynstr_index = eind->elf.dynstr_index;
3730 eind->elf.dynindx = -1;
3731 eind->elf.dynstr_index = 0;
3732 }
3733 }
3734
3735 /* Hook called by the linker routine which adds symbols from an object
3736 file. We use it to put .comm items in .sbss, and not .bss. */
3737
3738 static bfd_boolean
3739 ppc_elf_add_symbol_hook (bfd *abfd,
3740 struct bfd_link_info *info,
3741 Elf_Internal_Sym *sym,
3742 const char **namep ATTRIBUTE_UNUSED,
3743 flagword *flagsp ATTRIBUTE_UNUSED,
3744 asection **secp,
3745 bfd_vma *valp)
3746 {
3747 if (sym->st_shndx == SHN_COMMON
3748 && !bfd_link_relocatable (info)
3749 && is_ppc_elf (info->output_bfd)
3750 && sym->st_size <= elf_gp_size (abfd))
3751 {
3752 /* Common symbols less than or equal to -G nn bytes are automatically
3753 put into .sbss. */
3754 struct ppc_elf_link_hash_table *htab;
3755
3756 htab = ppc_elf_hash_table (info);
3757 if (htab->sbss == NULL)
3758 {
3759 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3760
3761 if (!htab->elf.dynobj)
3762 htab->elf.dynobj = abfd;
3763
3764 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3765 ".sbss",
3766 flags);
3767 if (htab->sbss == NULL)
3768 return FALSE;
3769 }
3770
3771 *secp = htab->sbss;
3772 *valp = sym->st_size;
3773 }
3774
3775 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3776 && (abfd->flags & DYNAMIC) == 0
3777 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3778 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3779
3780 return TRUE;
3781 }
3782 \f
3783 /* Find a linker generated pointer with a given addend and type. */
3784
3785 static elf_linker_section_pointers_t *
3786 elf_find_pointer_linker_section
3787 (elf_linker_section_pointers_t *linker_pointers,
3788 bfd_vma addend,
3789 elf_linker_section_t *lsect)
3790 {
3791 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3792 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3793 return linker_pointers;
3794
3795 return NULL;
3796 }
3797
3798 /* Allocate a pointer to live in a linker created section. */
3799
3800 static bfd_boolean
3801 elf_allocate_pointer_linker_section (bfd *abfd,
3802 elf_linker_section_t *lsect,
3803 struct elf_link_hash_entry *h,
3804 const Elf_Internal_Rela *rel)
3805 {
3806 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3807 elf_linker_section_pointers_t *linker_section_ptr;
3808 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3809 bfd_size_type amt;
3810
3811 BFD_ASSERT (lsect != NULL);
3812
3813 /* Is this a global symbol? */
3814 if (h != NULL)
3815 {
3816 struct ppc_elf_link_hash_entry *eh;
3817
3818 /* Has this symbol already been allocated? If so, our work is done. */
3819 eh = (struct ppc_elf_link_hash_entry *) h;
3820 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3821 rel->r_addend,
3822 lsect))
3823 return TRUE;
3824
3825 ptr_linker_section_ptr = &eh->linker_section_pointer;
3826 }
3827 else
3828 {
3829 BFD_ASSERT (is_ppc_elf (abfd));
3830
3831 /* Allocation of a pointer to a local symbol. */
3832 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3833
3834 /* Allocate a table to hold the local symbols if first time. */
3835 if (!ptr)
3836 {
3837 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3838
3839 amt = num_symbols;
3840 amt *= sizeof (elf_linker_section_pointers_t *);
3841 ptr = bfd_zalloc (abfd, amt);
3842
3843 if (!ptr)
3844 return FALSE;
3845
3846 elf_local_ptr_offsets (abfd) = ptr;
3847 }
3848
3849 /* Has this symbol already been allocated? If so, our work is done. */
3850 if (elf_find_pointer_linker_section (ptr[r_symndx],
3851 rel->r_addend,
3852 lsect))
3853 return TRUE;
3854
3855 ptr_linker_section_ptr = &ptr[r_symndx];
3856 }
3857
3858 /* Allocate space for a pointer in the linker section, and allocate
3859 a new pointer record from internal memory. */
3860 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3861 amt = sizeof (elf_linker_section_pointers_t);
3862 linker_section_ptr = bfd_alloc (abfd, amt);
3863
3864 if (!linker_section_ptr)
3865 return FALSE;
3866
3867 linker_section_ptr->next = *ptr_linker_section_ptr;
3868 linker_section_ptr->addend = rel->r_addend;
3869 linker_section_ptr->lsect = lsect;
3870 *ptr_linker_section_ptr = linker_section_ptr;
3871
3872 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3873 return FALSE;
3874 linker_section_ptr->offset = lsect->section->size;
3875 lsect->section->size += 4;
3876
3877 #ifdef DEBUG
3878 fprintf (stderr,
3879 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3880 lsect->name, (long) linker_section_ptr->offset,
3881 (long) lsect->section->size);
3882 #endif
3883
3884 return TRUE;
3885 }
3886
3887 static struct plt_entry **
3888 update_local_sym_info (bfd *abfd,
3889 Elf_Internal_Shdr *symtab_hdr,
3890 unsigned long r_symndx,
3891 int tls_type)
3892 {
3893 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3894 struct plt_entry **local_plt;
3895 char *local_got_tls_masks;
3896
3897 if (local_got_refcounts == NULL)
3898 {
3899 bfd_size_type size = symtab_hdr->sh_info;
3900
3901 size *= (sizeof (*local_got_refcounts)
3902 + sizeof (*local_plt)
3903 + sizeof (*local_got_tls_masks));
3904 local_got_refcounts = bfd_zalloc (abfd, size);
3905 if (local_got_refcounts == NULL)
3906 return NULL;
3907 elf_local_got_refcounts (abfd) = local_got_refcounts;
3908 }
3909
3910 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3911 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3912 local_got_tls_masks[r_symndx] |= tls_type;
3913 if (tls_type != PLT_IFUNC)
3914 local_got_refcounts[r_symndx] += 1;
3915 return local_plt + r_symndx;
3916 }
3917
3918 static bfd_boolean
3919 update_plt_info (bfd *abfd, struct plt_entry **plist,
3920 asection *sec, bfd_vma addend)
3921 {
3922 struct plt_entry *ent;
3923
3924 if (addend < 32768)
3925 sec = NULL;
3926 for (ent = *plist; ent != NULL; ent = ent->next)
3927 if (ent->sec == sec && ent->addend == addend)
3928 break;
3929 if (ent == NULL)
3930 {
3931 bfd_size_type amt = sizeof (*ent);
3932 ent = bfd_alloc (abfd, amt);
3933 if (ent == NULL)
3934 return FALSE;
3935 ent->next = *plist;
3936 ent->sec = sec;
3937 ent->addend = addend;
3938 ent->plt.refcount = 0;
3939 *plist = ent;
3940 }
3941 ent->plt.refcount += 1;
3942 return TRUE;
3943 }
3944
3945 static struct plt_entry *
3946 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3947 {
3948 struct plt_entry *ent;
3949
3950 if (addend < 32768)
3951 sec = NULL;
3952 for (ent = *plist; ent != NULL; ent = ent->next)
3953 if (ent->sec == sec && ent->addend == addend)
3954 break;
3955 return ent;
3956 }
3957
3958 static bfd_boolean
3959 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3960 {
3961 return (r_type == R_PPC_PLTREL24
3962 || r_type == R_PPC_LOCAL24PC
3963 || r_type == R_PPC_REL24
3964 || r_type == R_PPC_REL14
3965 || r_type == R_PPC_REL14_BRTAKEN
3966 || r_type == R_PPC_REL14_BRNTAKEN
3967 || r_type == R_PPC_ADDR24
3968 || r_type == R_PPC_ADDR14
3969 || r_type == R_PPC_ADDR14_BRTAKEN
3970 || r_type == R_PPC_ADDR14_BRNTAKEN
3971 || r_type == R_PPC_VLE_REL24);
3972 }
3973
3974 static void
3975 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3976 {
3977 _bfd_error_handler
3978 /* xgettext:c-format */
3979 (_("%B: relocation %s cannot be used when making a shared object"),
3980 abfd,
3981 ppc_elf_howto_table[r_type]->name);
3982 bfd_set_error (bfd_error_bad_value);
3983 }
3984
3985 /* Look through the relocs for a section during the first phase, and
3986 allocate space in the global offset table or procedure linkage
3987 table. */
3988
3989 static bfd_boolean
3990 ppc_elf_check_relocs (bfd *abfd,
3991 struct bfd_link_info *info,
3992 asection *sec,
3993 const Elf_Internal_Rela *relocs)
3994 {
3995 struct ppc_elf_link_hash_table *htab;
3996 Elf_Internal_Shdr *symtab_hdr;
3997 struct elf_link_hash_entry **sym_hashes;
3998 const Elf_Internal_Rela *rel;
3999 const Elf_Internal_Rela *rel_end;
4000 asection *got2, *sreloc;
4001 struct elf_link_hash_entry *tga;
4002
4003 if (bfd_link_relocatable (info))
4004 return TRUE;
4005
4006 /* Don't do anything special with non-loaded, non-alloced sections.
4007 In particular, any relocs in such sections should not affect GOT
4008 and PLT reference counting (ie. we don't allow them to create GOT
4009 or PLT entries), there's no possibility or desire to optimize TLS
4010 relocs, and there's not much point in propagating relocs to shared
4011 libs that the dynamic linker won't relocate. */
4012 if ((sec->flags & SEC_ALLOC) == 0)
4013 return TRUE;
4014
4015 #ifdef DEBUG
4016 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4017 sec, abfd);
4018 #endif
4019
4020 BFD_ASSERT (is_ppc_elf (abfd));
4021
4022 /* Initialize howto table if not already done. */
4023 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4024 ppc_elf_howto_init ();
4025
4026 htab = ppc_elf_hash_table (info);
4027 if (htab->glink == NULL)
4028 {
4029 if (htab->elf.dynobj == NULL)
4030 htab->elf.dynobj = abfd;
4031 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4032 return FALSE;
4033 }
4034 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4035 FALSE, FALSE, TRUE);
4036 symtab_hdr = &elf_symtab_hdr (abfd);
4037 sym_hashes = elf_sym_hashes (abfd);
4038 got2 = bfd_get_section_by_name (abfd, ".got2");
4039 sreloc = NULL;
4040
4041 rel_end = relocs + sec->reloc_count;
4042 for (rel = relocs; rel < rel_end; rel++)
4043 {
4044 unsigned long r_symndx;
4045 enum elf_ppc_reloc_type r_type;
4046 struct elf_link_hash_entry *h;
4047 int tls_type;
4048 struct plt_entry **ifunc;
4049
4050 r_symndx = ELF32_R_SYM (rel->r_info);
4051 if (r_symndx < symtab_hdr->sh_info)
4052 h = NULL;
4053 else
4054 {
4055 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4056 while (h->root.type == bfd_link_hash_indirect
4057 || h->root.type == bfd_link_hash_warning)
4058 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4059
4060 /* PR15323, ref flags aren't set for references in the same
4061 object. */
4062 h->root.non_ir_ref = 1;
4063 }
4064
4065 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4066 This shows up in particular in an R_PPC_ADDR32 in the eabi
4067 startup code. */
4068 if (h != NULL
4069 && htab->got == NULL
4070 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4071 {
4072 if (htab->elf.dynobj == NULL)
4073 htab->elf.dynobj = abfd;
4074 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4075 return FALSE;
4076 BFD_ASSERT (h == htab->elf.hgot);
4077 }
4078
4079 tls_type = 0;
4080 r_type = ELF32_R_TYPE (rel->r_info);
4081 ifunc = NULL;
4082 if (h == NULL && !htab->is_vxworks)
4083 {
4084 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4085 abfd, r_symndx);
4086 if (isym == NULL)
4087 return FALSE;
4088
4089 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4090 {
4091 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4092 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4093 PLT_IFUNC);
4094 if (ifunc == NULL)
4095 return FALSE;
4096
4097 /* STT_GNU_IFUNC symbols must have a PLT entry;
4098 In a non-pie executable even when there are
4099 no plt calls. */
4100 if (!bfd_link_pic (info)
4101 || is_branch_reloc (r_type))
4102 {
4103 bfd_vma addend = 0;
4104 if (r_type == R_PPC_PLTREL24)
4105 {
4106 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4107 if (bfd_link_pic (info))
4108 addend = rel->r_addend;
4109 }
4110 if (!update_plt_info (abfd, ifunc, got2, addend))
4111 return FALSE;
4112 }
4113 }
4114 }
4115
4116 if (!htab->is_vxworks
4117 && is_branch_reloc (r_type)
4118 && h != NULL
4119 && h == tga)
4120 {
4121 if (rel != relocs
4122 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4123 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4124 /* We have a new-style __tls_get_addr call with a marker
4125 reloc. */
4126 ;
4127 else
4128 /* Mark this section as having an old-style call. */
4129 sec->has_tls_get_addr_call = 1;
4130 }
4131
4132 switch (r_type)
4133 {
4134 case R_PPC_TLSGD:
4135 case R_PPC_TLSLD:
4136 /* These special tls relocs tie a call to __tls_get_addr with
4137 its parameter symbol. */
4138 break;
4139
4140 case R_PPC_GOT_TLSLD16:
4141 case R_PPC_GOT_TLSLD16_LO:
4142 case R_PPC_GOT_TLSLD16_HI:
4143 case R_PPC_GOT_TLSLD16_HA:
4144 tls_type = TLS_TLS | TLS_LD;
4145 goto dogottls;
4146
4147 case R_PPC_GOT_TLSGD16:
4148 case R_PPC_GOT_TLSGD16_LO:
4149 case R_PPC_GOT_TLSGD16_HI:
4150 case R_PPC_GOT_TLSGD16_HA:
4151 tls_type = TLS_TLS | TLS_GD;
4152 goto dogottls;
4153
4154 case R_PPC_GOT_TPREL16:
4155 case R_PPC_GOT_TPREL16_LO:
4156 case R_PPC_GOT_TPREL16_HI:
4157 case R_PPC_GOT_TPREL16_HA:
4158 if (bfd_link_pic (info))
4159 info->flags |= DF_STATIC_TLS;
4160 tls_type = TLS_TLS | TLS_TPREL;
4161 goto dogottls;
4162
4163 case R_PPC_GOT_DTPREL16:
4164 case R_PPC_GOT_DTPREL16_LO:
4165 case R_PPC_GOT_DTPREL16_HI:
4166 case R_PPC_GOT_DTPREL16_HA:
4167 tls_type = TLS_TLS | TLS_DTPREL;
4168 dogottls:
4169 sec->has_tls_reloc = 1;
4170 /* Fall through. */
4171
4172 /* GOT16 relocations */
4173 case R_PPC_GOT16:
4174 case R_PPC_GOT16_LO:
4175 case R_PPC_GOT16_HI:
4176 case R_PPC_GOT16_HA:
4177 /* This symbol requires a global offset table entry. */
4178 if (htab->got == NULL)
4179 {
4180 if (htab->elf.dynobj == NULL)
4181 htab->elf.dynobj = abfd;
4182 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4183 return FALSE;
4184 }
4185 if (h != NULL)
4186 {
4187 h->got.refcount += 1;
4188 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4189 }
4190 else
4191 /* This is a global offset table entry for a local symbol. */
4192 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4193 return FALSE;
4194
4195 /* We may also need a plt entry if the symbol turns out to be
4196 an ifunc. */
4197 if (h != NULL && !bfd_link_pic (info))
4198 {
4199 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4200 return FALSE;
4201 }
4202 break;
4203
4204 /* Indirect .sdata relocation. */
4205 case R_PPC_EMB_SDAI16:
4206 if (bfd_link_pic (info))
4207 {
4208 bad_shared_reloc (abfd, r_type);
4209 return FALSE;
4210 }
4211 htab->sdata[0].sym->ref_regular = 1;
4212 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4213 h, rel))
4214 return FALSE;
4215 if (h != NULL)
4216 {
4217 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4218 h->non_got_ref = TRUE;
4219 }
4220 break;
4221
4222 /* Indirect .sdata2 relocation. */
4223 case R_PPC_EMB_SDA2I16:
4224 if (bfd_link_pic (info))
4225 {
4226 bad_shared_reloc (abfd, r_type);
4227 return FALSE;
4228 }
4229 htab->sdata[1].sym->ref_regular = 1;
4230 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4231 h, rel))
4232 return FALSE;
4233 if (h != NULL)
4234 {
4235 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4236 h->non_got_ref = TRUE;
4237 }
4238 break;
4239
4240 case R_PPC_SDAREL16:
4241 htab->sdata[0].sym->ref_regular = 1;
4242 /* Fall through. */
4243
4244 case R_PPC_VLE_SDAREL_LO16A:
4245 case R_PPC_VLE_SDAREL_LO16D:
4246 case R_PPC_VLE_SDAREL_HI16A:
4247 case R_PPC_VLE_SDAREL_HI16D:
4248 case R_PPC_VLE_SDAREL_HA16A:
4249 case R_PPC_VLE_SDAREL_HA16D:
4250 if (h != NULL)
4251 {
4252 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4253 h->non_got_ref = TRUE;
4254 }
4255 break;
4256
4257 case R_PPC_VLE_REL8:
4258 case R_PPC_VLE_REL15:
4259 case R_PPC_VLE_REL24:
4260 case R_PPC_VLE_LO16A:
4261 case R_PPC_VLE_LO16D:
4262 case R_PPC_VLE_HI16A:
4263 case R_PPC_VLE_HI16D:
4264 case R_PPC_VLE_HA16A:
4265 case R_PPC_VLE_HA16D:
4266 break;
4267
4268 case R_PPC_EMB_SDA2REL:
4269 if (bfd_link_pic (info))
4270 {
4271 bad_shared_reloc (abfd, r_type);
4272 return FALSE;
4273 }
4274 htab->sdata[1].sym->ref_regular = 1;
4275 if (h != NULL)
4276 {
4277 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4278 h->non_got_ref = TRUE;
4279 }
4280 break;
4281
4282 case R_PPC_VLE_SDA21_LO:
4283 case R_PPC_VLE_SDA21:
4284 case R_PPC_EMB_SDA21:
4285 case R_PPC_EMB_RELSDA:
4286 if (bfd_link_pic (info))
4287 {
4288 bad_shared_reloc (abfd, r_type);
4289 return FALSE;
4290 }
4291 if (h != NULL)
4292 {
4293 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4294 h->non_got_ref = TRUE;
4295 }
4296 break;
4297
4298 case R_PPC_EMB_NADDR32:
4299 case R_PPC_EMB_NADDR16:
4300 case R_PPC_EMB_NADDR16_LO:
4301 case R_PPC_EMB_NADDR16_HI:
4302 case R_PPC_EMB_NADDR16_HA:
4303 if (bfd_link_pic (info))
4304 {
4305 bad_shared_reloc (abfd, r_type);
4306 return FALSE;
4307 }
4308 if (h != NULL)
4309 h->non_got_ref = TRUE;
4310 break;
4311
4312 case R_PPC_PLTREL24:
4313 if (h == NULL)
4314 break;
4315 /* Fall through */
4316 case R_PPC_PLT32:
4317 case R_PPC_PLTREL32:
4318 case R_PPC_PLT16_LO:
4319 case R_PPC_PLT16_HI:
4320 case R_PPC_PLT16_HA:
4321 #ifdef DEBUG
4322 fprintf (stderr, "Reloc requires a PLT entry\n");
4323 #endif
4324 /* This symbol requires a procedure linkage table entry. */
4325 if (h == NULL)
4326 {
4327 if (ifunc == NULL)
4328 {
4329 /* It does not make sense to have a procedure linkage
4330 table entry for a non-ifunc local symbol. */
4331 info->callbacks->einfo
4332 /* xgettext:c-format */
4333 (_("%P: %H: %s reloc against local symbol\n"),
4334 abfd, sec, rel->r_offset,
4335 ppc_elf_howto_table[r_type]->name);
4336 bfd_set_error (bfd_error_bad_value);
4337 return FALSE;
4338 }
4339 }
4340 else
4341 {
4342 bfd_vma addend = 0;
4343
4344 if (r_type == R_PPC_PLTREL24)
4345 {
4346 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4347 if (bfd_link_pic (info))
4348 addend = rel->r_addend;
4349 }
4350 h->needs_plt = 1;
4351 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4352 return FALSE;
4353 }
4354 break;
4355
4356 /* The following relocations don't need to propagate the
4357 relocation if linking a shared object since they are
4358 section relative. */
4359 case R_PPC_SECTOFF:
4360 case R_PPC_SECTOFF_LO:
4361 case R_PPC_SECTOFF_HI:
4362 case R_PPC_SECTOFF_HA:
4363 case R_PPC_DTPREL16:
4364 case R_PPC_DTPREL16_LO:
4365 case R_PPC_DTPREL16_HI:
4366 case R_PPC_DTPREL16_HA:
4367 case R_PPC_TOC16:
4368 break;
4369
4370 case R_PPC_REL16:
4371 case R_PPC_REL16_LO:
4372 case R_PPC_REL16_HI:
4373 case R_PPC_REL16_HA:
4374 case R_PPC_REL16DX_HA:
4375 ppc_elf_tdata (abfd)->has_rel16 = 1;
4376 break;
4377
4378 /* These are just markers. */
4379 case R_PPC_TLS:
4380 case R_PPC_EMB_MRKREF:
4381 case R_PPC_NONE:
4382 case R_PPC_max:
4383 case R_PPC_RELAX:
4384 case R_PPC_RELAX_PLT:
4385 case R_PPC_RELAX_PLTREL24:
4386 break;
4387
4388 /* These should only appear in dynamic objects. */
4389 case R_PPC_COPY:
4390 case R_PPC_GLOB_DAT:
4391 case R_PPC_JMP_SLOT:
4392 case R_PPC_RELATIVE:
4393 case R_PPC_IRELATIVE:
4394 break;
4395
4396 /* These aren't handled yet. We'll report an error later. */
4397 case R_PPC_ADDR30:
4398 case R_PPC_EMB_RELSEC16:
4399 case R_PPC_EMB_RELST_LO:
4400 case R_PPC_EMB_RELST_HI:
4401 case R_PPC_EMB_RELST_HA:
4402 case R_PPC_EMB_BIT_FLD:
4403 break;
4404
4405 /* This refers only to functions defined in the shared library. */
4406 case R_PPC_LOCAL24PC:
4407 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4408 {
4409 htab->plt_type = PLT_OLD;
4410 htab->old_bfd = abfd;
4411 }
4412 if (h != NULL && h->type == STT_GNU_IFUNC)
4413 {
4414 h->needs_plt = 1;
4415 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4416 return FALSE;
4417 }
4418 break;
4419
4420 /* This relocation describes the C++ object vtable hierarchy.
4421 Reconstruct it for later use during GC. */
4422 case R_PPC_GNU_VTINHERIT:
4423 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4424 return FALSE;
4425 break;
4426
4427 /* This relocation describes which C++ vtable entries are actually
4428 used. Record for later use during GC. */
4429 case R_PPC_GNU_VTENTRY:
4430 BFD_ASSERT (h != NULL);
4431 if (h != NULL
4432 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4433 return FALSE;
4434 break;
4435
4436 /* We shouldn't really be seeing these. */
4437 case R_PPC_TPREL32:
4438 case R_PPC_TPREL16:
4439 case R_PPC_TPREL16_LO:
4440 case R_PPC_TPREL16_HI:
4441 case R_PPC_TPREL16_HA:
4442 if (bfd_link_pic (info))
4443 info->flags |= DF_STATIC_TLS;
4444 goto dodyn;
4445
4446 /* Nor these. */
4447 case R_PPC_DTPMOD32:
4448 case R_PPC_DTPREL32:
4449 goto dodyn;
4450
4451 case R_PPC_REL32:
4452 if (h == NULL
4453 && got2 != NULL
4454 && (sec->flags & SEC_CODE) != 0
4455 && bfd_link_pic (info)
4456 && htab->plt_type == PLT_UNSET)
4457 {
4458 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4459 the start of a function, which assembles to a REL32
4460 reference to .got2. If we detect one of these, then
4461 force the old PLT layout because the linker cannot
4462 reliably deduce the GOT pointer value needed for
4463 PLT call stubs. */
4464 asection *s;
4465 Elf_Internal_Sym *isym;
4466
4467 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4468 abfd, r_symndx);
4469 if (isym == NULL)
4470 return FALSE;
4471
4472 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4473 if (s == got2)
4474 {
4475 htab->plt_type = PLT_OLD;
4476 htab->old_bfd = abfd;
4477 }
4478 }
4479 if (h == NULL || h == htab->elf.hgot)
4480 break;
4481 /* fall through */
4482
4483 case R_PPC_ADDR32:
4484 case R_PPC_ADDR16:
4485 case R_PPC_ADDR16_LO:
4486 case R_PPC_ADDR16_HI:
4487 case R_PPC_ADDR16_HA:
4488 case R_PPC_UADDR32:
4489 case R_PPC_UADDR16:
4490 if (h != NULL && !bfd_link_pic (info))
4491 {
4492 /* We may need a plt entry if the symbol turns out to be
4493 a function defined in a dynamic object. */
4494 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4495 return FALSE;
4496
4497 /* We may need a copy reloc too. */
4498 h->non_got_ref = 1;
4499 h->pointer_equality_needed = 1;
4500 if (r_type == R_PPC_ADDR16_HA)
4501 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4502 if (r_type == R_PPC_ADDR16_LO)
4503 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4504 }
4505 goto dodyn;
4506
4507 case R_PPC_REL24:
4508 case R_PPC_REL14:
4509 case R_PPC_REL14_BRTAKEN:
4510 case R_PPC_REL14_BRNTAKEN:
4511 if (h == NULL)
4512 break;
4513 if (h == htab->elf.hgot)
4514 {
4515 if (htab->plt_type == PLT_UNSET)
4516 {
4517 htab->plt_type = PLT_OLD;
4518 htab->old_bfd = abfd;
4519 }
4520 break;
4521 }
4522 /* fall through */
4523
4524 case R_PPC_ADDR24:
4525 case R_PPC_ADDR14:
4526 case R_PPC_ADDR14_BRTAKEN:
4527 case R_PPC_ADDR14_BRNTAKEN:
4528 if (h != NULL && !bfd_link_pic (info))
4529 {
4530 /* We may need a plt entry if the symbol turns out to be
4531 a function defined in a dynamic object. */
4532 h->needs_plt = 1;
4533 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4534 return FALSE;
4535 break;
4536 }
4537
4538 dodyn:
4539 /* If we are creating a shared library, and this is a reloc
4540 against a global symbol, or a non PC relative reloc
4541 against a local symbol, then we need to copy the reloc
4542 into the shared library. However, if we are linking with
4543 -Bsymbolic, we do not need to copy a reloc against a
4544 global symbol which is defined in an object we are
4545 including in the link (i.e., DEF_REGULAR is set). At
4546 this point we have not seen all the input files, so it is
4547 possible that DEF_REGULAR is not set now but will be set
4548 later (it is never cleared). In case of a weak definition,
4549 DEF_REGULAR may be cleared later by a strong definition in
4550 a shared library. We account for that possibility below by
4551 storing information in the dyn_relocs field of the hash
4552 table entry. A similar situation occurs when creating
4553 shared libraries and symbol visibility changes render the
4554 symbol local.
4555
4556 If on the other hand, we are creating an executable, we
4557 may need to keep relocations for symbols satisfied by a
4558 dynamic library if we manage to avoid copy relocs for the
4559 symbol. */
4560 if ((bfd_link_pic (info)
4561 && (must_be_dyn_reloc (info, r_type)
4562 || (h != NULL
4563 && (!SYMBOLIC_BIND (info, h)
4564 || h->root.type == bfd_link_hash_defweak
4565 || !h->def_regular))))
4566 || (ELIMINATE_COPY_RELOCS
4567 && !bfd_link_pic (info)
4568 && h != NULL
4569 && (h->root.type == bfd_link_hash_defweak
4570 || !h->def_regular)))
4571 {
4572 #ifdef DEBUG
4573 fprintf (stderr,
4574 "ppc_elf_check_relocs needs to "
4575 "create relocation for %s\n",
4576 (h && h->root.root.string
4577 ? h->root.root.string : "<unknown>"));
4578 #endif
4579 if (sreloc == NULL)
4580 {
4581 if (htab->elf.dynobj == NULL)
4582 htab->elf.dynobj = abfd;
4583
4584 sreloc = _bfd_elf_make_dynamic_reloc_section
4585 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4586
4587 if (sreloc == NULL)
4588 return FALSE;
4589 }
4590
4591 /* If this is a global symbol, we count the number of
4592 relocations we need for this symbol. */
4593 if (h != NULL)
4594 {
4595 struct elf_dyn_relocs *p;
4596 struct elf_dyn_relocs **rel_head;
4597
4598 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4599 p = *rel_head;
4600 if (p == NULL || p->sec != sec)
4601 {
4602 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4603 if (p == NULL)
4604 return FALSE;
4605 p->next = *rel_head;
4606 *rel_head = p;
4607 p->sec = sec;
4608 p->count = 0;
4609 p->pc_count = 0;
4610 }
4611 p->count += 1;
4612 if (!must_be_dyn_reloc (info, r_type))
4613 p->pc_count += 1;
4614 }
4615 else
4616 {
4617 /* Track dynamic relocs needed for local syms too.
4618 We really need local syms available to do this
4619 easily. Oh well. */
4620 struct ppc_dyn_relocs *p;
4621 struct ppc_dyn_relocs **rel_head;
4622 bfd_boolean is_ifunc;
4623 asection *s;
4624 void *vpp;
4625 Elf_Internal_Sym *isym;
4626
4627 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4628 abfd, r_symndx);
4629 if (isym == NULL)
4630 return FALSE;
4631
4632 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4633 if (s == NULL)
4634 s = sec;
4635
4636 vpp = &elf_section_data (s)->local_dynrel;
4637 rel_head = (struct ppc_dyn_relocs **) vpp;
4638 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4639 p = *rel_head;
4640 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4641 p = p->next;
4642 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4643 {
4644 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4645 if (p == NULL)
4646 return FALSE;
4647 p->next = *rel_head;
4648 *rel_head = p;
4649 p->sec = sec;
4650 p->ifunc = is_ifunc;
4651 p->count = 0;
4652 }
4653 p->count += 1;
4654 }
4655 }
4656
4657 break;
4658 }
4659 }
4660
4661 return TRUE;
4662 }
4663 \f
4664 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4665 and OBFD, and merge non-conflicting ones. */
4666 void
4667 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4668 {
4669 bfd *obfd = info->output_bfd;
4670 obj_attribute *in_attr, *in_attrs;
4671 obj_attribute *out_attr, *out_attrs;
4672
4673 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4674 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4675
4676 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4677 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4678
4679 if (in_attr->i != out_attr->i)
4680 {
4681 int in_fp = in_attr->i & 3;
4682 int out_fp = out_attr->i & 3;
4683
4684 if (in_fp == 0)
4685 ;
4686 else if (out_fp == 0)
4687 {
4688 out_attr->type = 1;
4689 out_attr->i ^= in_fp;
4690 }
4691 else if (out_fp != 2 && in_fp == 2)
4692 _bfd_error_handler
4693 /* xgettext:c-format */
4694 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4695 else if (out_fp == 2 && in_fp != 2)
4696 _bfd_error_handler
4697 /* xgettext:c-format */
4698 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4699 else if (out_fp == 1 && in_fp == 3)
4700 _bfd_error_handler
4701 /* xgettext:c-format */
4702 (_("Warning: %B uses double-precision hard float, "
4703 "%B uses single-precision hard float"), obfd, ibfd);
4704 else if (out_fp == 3 && in_fp == 1)
4705 _bfd_error_handler
4706 /* xgettext:c-format */
4707 (_("Warning: %B uses double-precision hard float, "
4708 "%B uses single-precision hard float"), ibfd, obfd);
4709
4710 in_fp = in_attr->i & 0xc;
4711 out_fp = out_attr->i & 0xc;
4712 if (in_fp == 0)
4713 ;
4714 else if (out_fp == 0)
4715 {
4716 out_attr->type = 1;
4717 out_attr->i ^= in_fp;
4718 }
4719 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4720 _bfd_error_handler
4721 /* xgettext:c-format */
4722 (_("Warning: %B uses 64-bit long double, "
4723 "%B uses 128-bit long double"), ibfd, obfd);
4724 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4725 _bfd_error_handler
4726 /* xgettext:c-format */
4727 (_("Warning: %B uses 64-bit long double, "
4728 "%B uses 128-bit long double"), obfd, ibfd);
4729 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4730 _bfd_error_handler
4731 /* xgettext:c-format */
4732 (_("Warning: %B uses IBM long double, "
4733 "%B uses IEEE long double"), ibfd, obfd);
4734 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4735 _bfd_error_handler
4736 /* xgettext:c-format */
4737 (_("Warning: %B uses IBM long double, "
4738 "%B uses IEEE long double"), obfd, ibfd);
4739 }
4740 }
4741
4742 /* Merge object attributes from IBFD into OBFD. Warn if
4743 there are conflicting attributes. */
4744 static bfd_boolean
4745 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4746 {
4747 bfd *obfd;
4748 obj_attribute *in_attr, *in_attrs;
4749 obj_attribute *out_attr, *out_attrs;
4750
4751 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4752
4753 obfd = info->output_bfd;
4754 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4755 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4756
4757 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4758 merge non-conflicting ones. */
4759 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4760 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4761 if (in_attr->i != out_attr->i)
4762 {
4763 int in_vec = in_attr->i & 3;
4764 int out_vec = out_attr->i & 3;
4765
4766 if (in_vec == 0)
4767 ;
4768 else if (out_vec == 0)
4769 {
4770 out_attr->type = 1;
4771 out_attr->i = in_vec;
4772 }
4773 /* For now, allow generic to transition to AltiVec or SPE
4774 without a warning. If GCC marked files with their stack
4775 alignment and used don't-care markings for files which are
4776 not affected by the vector ABI, we could warn about this
4777 case too. */
4778 else if (in_vec == 1)
4779 ;
4780 else if (out_vec == 1)
4781 {
4782 out_attr->type = 1;
4783 out_attr->i = in_vec;
4784 }
4785 else if (out_vec < in_vec)
4786 _bfd_error_handler
4787 /* xgettext:c-format */
4788 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4789 obfd, ibfd);
4790 else if (out_vec > in_vec)
4791 _bfd_error_handler
4792 /* xgettext:c-format */
4793 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4794 ibfd, obfd);
4795 }
4796
4797 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4798 and merge non-conflicting ones. */
4799 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4800 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4801 if (in_attr->i != out_attr->i)
4802 {
4803 int in_struct = in_attr->i & 3;
4804 int out_struct = out_attr->i & 3;
4805
4806 if (in_struct == 0 || in_struct == 3)
4807 ;
4808 else if (out_struct == 0)
4809 {
4810 out_attr->type = 1;
4811 out_attr->i = in_struct;
4812 }
4813 else if (out_struct < in_struct)
4814 _bfd_error_handler
4815 /* xgettext:c-format */
4816 (_("Warning: %B uses r3/r4 for small structure returns, "
4817 "%B uses memory"), obfd, ibfd);
4818 else if (out_struct > in_struct)
4819 _bfd_error_handler
4820 /* xgettext:c-format */
4821 (_("Warning: %B uses r3/r4 for small structure returns, "
4822 "%B uses memory"), ibfd, obfd);
4823 }
4824
4825 /* Merge Tag_compatibility attributes and any common GNU ones. */
4826 _bfd_elf_merge_object_attributes (ibfd, info);
4827
4828 return TRUE;
4829 }
4830
4831 /* Merge backend specific data from an object file to the output
4832 object file when linking. */
4833
4834 static bfd_boolean
4835 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4836 {
4837 bfd *obfd = info->output_bfd;
4838 flagword old_flags;
4839 flagword new_flags;
4840 bfd_boolean error;
4841
4842 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4843 return TRUE;
4844
4845 /* Check if we have the same endianness. */
4846 if (! _bfd_generic_verify_endian_match (ibfd, info))
4847 return FALSE;
4848
4849 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4850 return FALSE;
4851
4852 new_flags = elf_elfheader (ibfd)->e_flags;
4853 old_flags = elf_elfheader (obfd)->e_flags;
4854 if (!elf_flags_init (obfd))
4855 {
4856 /* First call, no flags set. */
4857 elf_flags_init (obfd) = TRUE;
4858 elf_elfheader (obfd)->e_flags = new_flags;
4859 }
4860
4861 /* Compatible flags are ok. */
4862 else if (new_flags == old_flags)
4863 ;
4864
4865 /* Incompatible flags. */
4866 else
4867 {
4868 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4869 to be linked with either. */
4870 error = FALSE;
4871 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4872 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4873 {
4874 error = TRUE;
4875 _bfd_error_handler
4876 (_("%B: compiled with -mrelocatable and linked with "
4877 "modules compiled normally"), ibfd);
4878 }
4879 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4880 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4881 {
4882 error = TRUE;
4883 _bfd_error_handler
4884 (_("%B: compiled normally and linked with "
4885 "modules compiled with -mrelocatable"), ibfd);
4886 }
4887
4888 /* The output is -mrelocatable-lib iff both the input files are. */
4889 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4890 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4891
4892 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4893 but each input file is either -mrelocatable or -mrelocatable-lib. */
4894 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4895 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4896 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4897 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4898
4899 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4900 any module uses it. */
4901 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4902
4903 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4904 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4905
4906 /* Warn about any other mismatches. */
4907 if (new_flags != old_flags)
4908 {
4909 error = TRUE;
4910 _bfd_error_handler
4911 /* xgettext:c-format */
4912 (_("%B: uses different e_flags (0x%lx) fields "
4913 "than previous modules (0x%lx)"),
4914 ibfd, (long) new_flags, (long) old_flags);
4915 }
4916
4917 if (error)
4918 {
4919 bfd_set_error (bfd_error_bad_value);
4920 return FALSE;
4921 }
4922 }
4923
4924 return TRUE;
4925 }
4926
4927 static void
4928 ppc_elf_vle_split16 (bfd *input_bfd,
4929 asection *input_section,
4930 unsigned long offset,
4931 bfd_byte *loc,
4932 bfd_vma value,
4933 split16_format_type split16_format,
4934 bfd_boolean fixup)
4935 {
4936 unsigned int insn, opcode, top5;
4937
4938 insn = bfd_get_32 (input_bfd, loc);
4939 opcode = insn & 0xf300f800;
4940 if (opcode == E_OR2I_INSN
4941 || opcode == E_AND2I_DOT_INSN
4942 || opcode == E_OR2IS_INSN
4943 || opcode == E_LIS_INSN
4944 || opcode == E_AND2IS_DOT_INSN)
4945 {
4946 if (split16_format != split16a_type)
4947 {
4948 if (fixup)
4949 split16_format = split16a_type;
4950 else
4951 _bfd_error_handler
4952 /* xgettext:c-format */
4953 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4954 input_bfd, input_section, offset, opcode);
4955 }
4956 }
4957 else if (opcode == E_ADD2I_DOT_INSN
4958 || opcode == E_ADD2IS_INSN
4959 || opcode == E_CMP16I_INSN
4960 || opcode == E_MULL2I_INSN
4961 || opcode == E_CMPL16I_INSN
4962 || opcode == E_CMPH16I_INSN
4963 || opcode == E_CMPHL16I_INSN)
4964 {
4965 if (split16_format != split16d_type)
4966 {
4967 if (fixup)
4968 split16_format = split16d_type;
4969 else
4970 _bfd_error_handler
4971 /* xgettext:c-format */
4972 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4973 input_bfd, input_section, offset, opcode);
4974 }
4975 }
4976 top5 = value & 0xf800;
4977 top5 = top5 << (split16_format == split16a_type ? 5 : 9);
4978 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x1f007ff);
4979 insn |= top5;
4980 insn |= value & 0x7ff;
4981 bfd_put_32 (input_bfd, insn, loc);
4982 }
4983 \f
4984 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4985 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4986 int
4987 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4988 struct bfd_link_info *info)
4989 {
4990 struct ppc_elf_link_hash_table *htab;
4991 flagword flags;
4992
4993 htab = ppc_elf_hash_table (info);
4994
4995 if (htab->plt_type == PLT_UNSET)
4996 {
4997 struct elf_link_hash_entry *h;
4998
4999 if (htab->params->plt_style == PLT_OLD)
5000 htab->plt_type = PLT_OLD;
5001 else if (bfd_link_pic (info)
5002 && htab->elf.dynamic_sections_created
5003 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5004 FALSE, FALSE, TRUE)) != NULL
5005 && (h->type == STT_FUNC
5006 || h->needs_plt)
5007 && h->ref_regular
5008 && !(SYMBOL_CALLS_LOCAL (info, h)
5009 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5010 && h->root.type == bfd_link_hash_undefweak)))
5011 {
5012 /* Profiling of shared libs (and pies) is not supported with
5013 secure plt, because ppc32 does profiling before a
5014 function prologue and a secure plt pic call stubs needs
5015 r30 to be set up. */
5016 htab->plt_type = PLT_OLD;
5017 }
5018 else
5019 {
5020 bfd *ibfd;
5021 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5022
5023 /* Look through the reloc flags left by ppc_elf_check_relocs.
5024 Use the old style bss plt if a file makes plt calls
5025 without using the new relocs, and if ld isn't given
5026 --secure-plt and we never see REL16 relocs. */
5027 if (plt_type == PLT_UNSET)
5028 plt_type = PLT_OLD;
5029 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5030 if (is_ppc_elf (ibfd))
5031 {
5032 if (ppc_elf_tdata (ibfd)->has_rel16)
5033 plt_type = PLT_NEW;
5034 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5035 {
5036 plt_type = PLT_OLD;
5037 htab->old_bfd = ibfd;
5038 break;
5039 }
5040 }
5041 htab->plt_type = plt_type;
5042 }
5043 }
5044 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5045 {
5046 if (htab->old_bfd != NULL)
5047 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5048 htab->old_bfd);
5049 else
5050 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5051 }
5052
5053 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5054
5055 if (htab->plt_type == PLT_NEW)
5056 {
5057 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5058 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5059
5060 /* The new PLT is a loaded section. */
5061 if (htab->plt != NULL
5062 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
5063 return -1;
5064
5065 /* The new GOT is not executable. */
5066 if (htab->got != NULL
5067 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
5068 return -1;
5069 }
5070 else
5071 {
5072 /* Stop an unused .glink section from affecting .text alignment. */
5073 if (htab->glink != NULL
5074 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5075 return -1;
5076 }
5077 return htab->plt_type == PLT_NEW;
5078 }
5079 \f
5080 /* Return the section that should be marked against GC for a given
5081 relocation. */
5082
5083 static asection *
5084 ppc_elf_gc_mark_hook (asection *sec,
5085 struct bfd_link_info *info,
5086 Elf_Internal_Rela *rel,
5087 struct elf_link_hash_entry *h,
5088 Elf_Internal_Sym *sym)
5089 {
5090 if (h != NULL)
5091 switch (ELF32_R_TYPE (rel->r_info))
5092 {
5093 case R_PPC_GNU_VTINHERIT:
5094 case R_PPC_GNU_VTENTRY:
5095 return NULL;
5096 }
5097
5098 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5099 }
5100
5101 /* Update the got, plt and dynamic reloc reference counts for the
5102 section being removed. */
5103
5104 static bfd_boolean
5105 ppc_elf_gc_sweep_hook (bfd *abfd,
5106 struct bfd_link_info *info,
5107 asection *sec,
5108 const Elf_Internal_Rela *relocs)
5109 {
5110 struct ppc_elf_link_hash_table *htab;
5111 Elf_Internal_Shdr *symtab_hdr;
5112 struct elf_link_hash_entry **sym_hashes;
5113 bfd_signed_vma *local_got_refcounts;
5114 const Elf_Internal_Rela *rel, *relend;
5115 asection *got2;
5116
5117 if (bfd_link_relocatable (info))
5118 return TRUE;
5119
5120 if ((sec->flags & SEC_ALLOC) == 0)
5121 return TRUE;
5122
5123 elf_section_data (sec)->local_dynrel = NULL;
5124
5125 htab = ppc_elf_hash_table (info);
5126 symtab_hdr = &elf_symtab_hdr (abfd);
5127 sym_hashes = elf_sym_hashes (abfd);
5128 local_got_refcounts = elf_local_got_refcounts (abfd);
5129 got2 = bfd_get_section_by_name (abfd, ".got2");
5130
5131 relend = relocs + sec->reloc_count;
5132 for (rel = relocs; rel < relend; rel++)
5133 {
5134 unsigned long r_symndx;
5135 enum elf_ppc_reloc_type r_type;
5136 struct elf_link_hash_entry *h = NULL;
5137
5138 r_symndx = ELF32_R_SYM (rel->r_info);
5139 if (r_symndx >= symtab_hdr->sh_info)
5140 {
5141 struct elf_dyn_relocs **pp, *p;
5142 struct ppc_elf_link_hash_entry *eh;
5143
5144 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5145 while (h->root.type == bfd_link_hash_indirect
5146 || h->root.type == bfd_link_hash_warning)
5147 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5148 eh = (struct ppc_elf_link_hash_entry *) h;
5149
5150 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5151 if (p->sec == sec)
5152 {
5153 /* Everything must go for SEC. */
5154 *pp = p->next;
5155 break;
5156 }
5157 }
5158
5159 r_type = ELF32_R_TYPE (rel->r_info);
5160 if (!htab->is_vxworks
5161 && h == NULL
5162 && local_got_refcounts != NULL
5163 && (!bfd_link_pic (info)
5164 || is_branch_reloc (r_type)))
5165 {
5166 struct plt_entry **local_plt = (struct plt_entry **)
5167 (local_got_refcounts + symtab_hdr->sh_info);
5168 char *local_got_tls_masks = (char *)
5169 (local_plt + symtab_hdr->sh_info);
5170 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5171 {
5172 struct plt_entry **ifunc = local_plt + r_symndx;
5173 bfd_vma addend = 0;
5174 struct plt_entry *ent;
5175
5176 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5177 addend = rel->r_addend;
5178 ent = find_plt_ent (ifunc, got2, addend);
5179 if (ent->plt.refcount > 0)
5180 ent->plt.refcount -= 1;
5181 continue;
5182 }
5183 }
5184
5185 switch (r_type)
5186 {
5187 case R_PPC_GOT_TLSLD16:
5188 case R_PPC_GOT_TLSLD16_LO:
5189 case R_PPC_GOT_TLSLD16_HI:
5190 case R_PPC_GOT_TLSLD16_HA:
5191 case R_PPC_GOT_TLSGD16:
5192 case R_PPC_GOT_TLSGD16_LO:
5193 case R_PPC_GOT_TLSGD16_HI:
5194 case R_PPC_GOT_TLSGD16_HA:
5195 case R_PPC_GOT_TPREL16:
5196 case R_PPC_GOT_TPREL16_LO:
5197 case R_PPC_GOT_TPREL16_HI:
5198 case R_PPC_GOT_TPREL16_HA:
5199 case R_PPC_GOT_DTPREL16:
5200 case R_PPC_GOT_DTPREL16_LO:
5201 case R_PPC_GOT_DTPREL16_HI:
5202 case R_PPC_GOT_DTPREL16_HA:
5203 case R_PPC_GOT16:
5204 case R_PPC_GOT16_LO:
5205 case R_PPC_GOT16_HI:
5206 case R_PPC_GOT16_HA:
5207 if (h != NULL)
5208 {
5209 if (h->got.refcount > 0)
5210 h->got.refcount--;
5211 if (!bfd_link_pic (info))
5212 {
5213 struct plt_entry *ent;
5214
5215 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5216 if (ent != NULL && ent->plt.refcount > 0)
5217 ent->plt.refcount -= 1;
5218 }
5219 }
5220 else if (local_got_refcounts != NULL)
5221 {
5222 if (local_got_refcounts[r_symndx] > 0)
5223 local_got_refcounts[r_symndx]--;
5224 }
5225 break;
5226
5227 case R_PPC_REL24:
5228 case R_PPC_REL14:
5229 case R_PPC_REL14_BRTAKEN:
5230 case R_PPC_REL14_BRNTAKEN:
5231 case R_PPC_REL32:
5232 if (h == NULL || h == htab->elf.hgot)
5233 break;
5234 /* Fall through. */
5235
5236 case R_PPC_ADDR32:
5237 case R_PPC_ADDR24:
5238 case R_PPC_ADDR16:
5239 case R_PPC_ADDR16_LO:
5240 case R_PPC_ADDR16_HI:
5241 case R_PPC_ADDR16_HA:
5242 case R_PPC_ADDR14:
5243 case R_PPC_ADDR14_BRTAKEN:
5244 case R_PPC_ADDR14_BRNTAKEN:
5245 case R_PPC_UADDR32:
5246 case R_PPC_UADDR16:
5247 if (bfd_link_pic (info))
5248 break;
5249 /* Fall through. */
5250
5251 case R_PPC_PLT32:
5252 case R_PPC_PLTREL24:
5253 case R_PPC_PLTREL32:
5254 case R_PPC_PLT16_LO:
5255 case R_PPC_PLT16_HI:
5256 case R_PPC_PLT16_HA:
5257 if (h != NULL)
5258 {
5259 bfd_vma addend = 0;
5260 struct plt_entry *ent;
5261
5262 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5263 addend = rel->r_addend;
5264 ent = find_plt_ent (&h->plt.plist, got2, addend);
5265 if (ent != NULL && ent->plt.refcount > 0)
5266 ent->plt.refcount -= 1;
5267 }
5268 break;
5269
5270 default:
5271 break;
5272 }
5273 }
5274 return TRUE;
5275 }
5276 \f
5277 /* Set plt output section type, htab->tls_get_addr, and call the
5278 generic ELF tls_setup function. */
5279
5280 asection *
5281 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5282 {
5283 struct ppc_elf_link_hash_table *htab;
5284
5285 htab = ppc_elf_hash_table (info);
5286 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5287 FALSE, FALSE, TRUE);
5288 if (htab->plt_type != PLT_NEW)
5289 htab->params->no_tls_get_addr_opt = TRUE;
5290
5291 if (!htab->params->no_tls_get_addr_opt)
5292 {
5293 struct elf_link_hash_entry *opt, *tga;
5294 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5295 FALSE, FALSE, TRUE);
5296 if (opt != NULL
5297 && (opt->root.type == bfd_link_hash_defined
5298 || opt->root.type == bfd_link_hash_defweak))
5299 {
5300 /* If glibc supports an optimized __tls_get_addr call stub,
5301 signalled by the presence of __tls_get_addr_opt, and we'll
5302 be calling __tls_get_addr via a plt call stub, then
5303 make __tls_get_addr point to __tls_get_addr_opt. */
5304 tga = htab->tls_get_addr;
5305 if (htab->elf.dynamic_sections_created
5306 && tga != NULL
5307 && (tga->type == STT_FUNC
5308 || tga->needs_plt)
5309 && !(SYMBOL_CALLS_LOCAL (info, tga)
5310 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5311 && tga->root.type == bfd_link_hash_undefweak)))
5312 {
5313 struct plt_entry *ent;
5314 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5315 if (ent->plt.refcount > 0)
5316 break;
5317 if (ent != NULL)
5318 {
5319 tga->root.type = bfd_link_hash_indirect;
5320 tga->root.u.i.link = &opt->root;
5321 ppc_elf_copy_indirect_symbol (info, opt, tga);
5322 opt->forced_local = 0;
5323 if (opt->dynindx != -1)
5324 {
5325 /* Use __tls_get_addr_opt in dynamic relocations. */
5326 opt->dynindx = -1;
5327 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5328 opt->dynstr_index);
5329 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5330 return FALSE;
5331 }
5332 htab->tls_get_addr = opt;
5333 }
5334 }
5335 }
5336 else
5337 htab->params->no_tls_get_addr_opt = TRUE;
5338 }
5339 if (htab->plt_type == PLT_NEW
5340 && htab->plt != NULL
5341 && htab->plt->output_section != NULL)
5342 {
5343 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5344 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5345 }
5346
5347 return _bfd_elf_tls_setup (obfd, info);
5348 }
5349
5350 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5351 HASH. */
5352
5353 static bfd_boolean
5354 branch_reloc_hash_match (const bfd *ibfd,
5355 const Elf_Internal_Rela *rel,
5356 const struct elf_link_hash_entry *hash)
5357 {
5358 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5359 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5360 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5361
5362 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5363 {
5364 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5365 struct elf_link_hash_entry *h;
5366
5367 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5368 while (h->root.type == bfd_link_hash_indirect
5369 || h->root.type == bfd_link_hash_warning)
5370 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5371 if (h == hash)
5372 return TRUE;
5373 }
5374 return FALSE;
5375 }
5376
5377 /* Run through all the TLS relocs looking for optimization
5378 opportunities. */
5379
5380 bfd_boolean
5381 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5382 struct bfd_link_info *info)
5383 {
5384 bfd *ibfd;
5385 asection *sec;
5386 struct ppc_elf_link_hash_table *htab;
5387 int pass;
5388
5389 if (!bfd_link_executable (info))
5390 return TRUE;
5391
5392 htab = ppc_elf_hash_table (info);
5393 if (htab == NULL)
5394 return FALSE;
5395
5396 /* Make two passes through the relocs. First time check that tls
5397 relocs involved in setting up a tls_get_addr call are indeed
5398 followed by such a call. If they are not, don't do any tls
5399 optimization. On the second pass twiddle tls_mask flags to
5400 notify relocate_section that optimization can be done, and
5401 adjust got and plt refcounts. */
5402 for (pass = 0; pass < 2; ++pass)
5403 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5404 {
5405 Elf_Internal_Sym *locsyms = NULL;
5406 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5407 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5408
5409 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5410 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5411 {
5412 Elf_Internal_Rela *relstart, *rel, *relend;
5413 int expecting_tls_get_addr = 0;
5414
5415 /* Read the relocations. */
5416 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5417 info->keep_memory);
5418 if (relstart == NULL)
5419 return FALSE;
5420
5421 relend = relstart + sec->reloc_count;
5422 for (rel = relstart; rel < relend; rel++)
5423 {
5424 enum elf_ppc_reloc_type r_type;
5425 unsigned long r_symndx;
5426 struct elf_link_hash_entry *h = NULL;
5427 char *tls_mask;
5428 char tls_set, tls_clear;
5429 bfd_boolean is_local;
5430 bfd_signed_vma *got_count;
5431
5432 r_symndx = ELF32_R_SYM (rel->r_info);
5433 if (r_symndx >= symtab_hdr->sh_info)
5434 {
5435 struct elf_link_hash_entry **sym_hashes;
5436
5437 sym_hashes = elf_sym_hashes (ibfd);
5438 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5439 while (h->root.type == bfd_link_hash_indirect
5440 || h->root.type == bfd_link_hash_warning)
5441 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5442 }
5443
5444 is_local = FALSE;
5445 if (h == NULL
5446 || !h->def_dynamic)
5447 is_local = TRUE;
5448
5449 r_type = ELF32_R_TYPE (rel->r_info);
5450 /* If this section has old-style __tls_get_addr calls
5451 without marker relocs, then check that each
5452 __tls_get_addr call reloc is preceded by a reloc
5453 that conceivably belongs to the __tls_get_addr arg
5454 setup insn. If we don't find matching arg setup
5455 relocs, don't do any tls optimization. */
5456 if (pass == 0
5457 && sec->has_tls_get_addr_call
5458 && h != NULL
5459 && h == htab->tls_get_addr
5460 && !expecting_tls_get_addr
5461 && is_branch_reloc (r_type))
5462 {
5463 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5464 "TLS optimization disabled\n",
5465 ibfd, sec, rel->r_offset);
5466 if (elf_section_data (sec)->relocs != relstart)
5467 free (relstart);
5468 return TRUE;
5469 }
5470
5471 expecting_tls_get_addr = 0;
5472 switch (r_type)
5473 {
5474 case R_PPC_GOT_TLSLD16:
5475 case R_PPC_GOT_TLSLD16_LO:
5476 expecting_tls_get_addr = 1;
5477 /* Fall through. */
5478
5479 case R_PPC_GOT_TLSLD16_HI:
5480 case R_PPC_GOT_TLSLD16_HA:
5481 /* These relocs should never be against a symbol
5482 defined in a shared lib. Leave them alone if
5483 that turns out to be the case. */
5484 if (!is_local)
5485 continue;
5486
5487 /* LD -> LE */
5488 tls_set = 0;
5489 tls_clear = TLS_LD;
5490 break;
5491
5492 case R_PPC_GOT_TLSGD16:
5493 case R_PPC_GOT_TLSGD16_LO:
5494 expecting_tls_get_addr = 1;
5495 /* Fall through. */
5496
5497 case R_PPC_GOT_TLSGD16_HI:
5498 case R_PPC_GOT_TLSGD16_HA:
5499 if (is_local)
5500 /* GD -> LE */
5501 tls_set = 0;
5502 else
5503 /* GD -> IE */
5504 tls_set = TLS_TLS | TLS_TPRELGD;
5505 tls_clear = TLS_GD;
5506 break;
5507
5508 case R_PPC_GOT_TPREL16:
5509 case R_PPC_GOT_TPREL16_LO:
5510 case R_PPC_GOT_TPREL16_HI:
5511 case R_PPC_GOT_TPREL16_HA:
5512 if (is_local)
5513 {
5514 /* IE -> LE */
5515 tls_set = 0;
5516 tls_clear = TLS_TPREL;
5517 break;
5518 }
5519 else
5520 continue;
5521
5522 case R_PPC_TLSGD:
5523 case R_PPC_TLSLD:
5524 expecting_tls_get_addr = 2;
5525 tls_set = 0;
5526 tls_clear = 0;
5527 break;
5528
5529 default:
5530 continue;
5531 }
5532
5533 if (pass == 0)
5534 {
5535 if (!expecting_tls_get_addr
5536 || (expecting_tls_get_addr == 1
5537 && !sec->has_tls_get_addr_call))
5538 continue;
5539
5540 if (rel + 1 < relend
5541 && branch_reloc_hash_match (ibfd, rel + 1,
5542 htab->tls_get_addr))
5543 continue;
5544
5545 /* Uh oh, we didn't find the expected call. We
5546 could just mark this symbol to exclude it
5547 from tls optimization but it's safer to skip
5548 the entire optimization. */
5549 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5550 "TLS optimization disabled\n"),
5551 ibfd, sec, rel->r_offset);
5552 if (elf_section_data (sec)->relocs != relstart)
5553 free (relstart);
5554 return TRUE;
5555 }
5556
5557 if (expecting_tls_get_addr)
5558 {
5559 struct plt_entry *ent;
5560 bfd_vma addend = 0;
5561
5562 if (bfd_link_pic (info)
5563 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5564 addend = rel[1].r_addend;
5565 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5566 got2, addend);
5567 if (ent != NULL && ent->plt.refcount > 0)
5568 ent->plt.refcount -= 1;
5569
5570 if (expecting_tls_get_addr == 2)
5571 continue;
5572 }
5573
5574 if (h != NULL)
5575 {
5576 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5577 got_count = &h->got.refcount;
5578 }
5579 else
5580 {
5581 bfd_signed_vma *lgot_refs;
5582 struct plt_entry **local_plt;
5583 char *lgot_masks;
5584
5585 if (locsyms == NULL)
5586 {
5587 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5588 if (locsyms == NULL)
5589 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5590 symtab_hdr->sh_info,
5591 0, NULL, NULL, NULL);
5592 if (locsyms == NULL)
5593 {
5594 if (elf_section_data (sec)->relocs != relstart)
5595 free (relstart);
5596 return FALSE;
5597 }
5598 }
5599 lgot_refs = elf_local_got_refcounts (ibfd);
5600 if (lgot_refs == NULL)
5601 abort ();
5602 local_plt = (struct plt_entry **)
5603 (lgot_refs + symtab_hdr->sh_info);
5604 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5605 tls_mask = &lgot_masks[r_symndx];
5606 got_count = &lgot_refs[r_symndx];
5607 }
5608
5609 if (tls_set == 0)
5610 {
5611 /* We managed to get rid of a got entry. */
5612 if (*got_count > 0)
5613 *got_count -= 1;
5614 }
5615
5616 *tls_mask |= tls_set;
5617 *tls_mask &= ~tls_clear;
5618 }
5619
5620 if (elf_section_data (sec)->relocs != relstart)
5621 free (relstart);
5622 }
5623
5624 if (locsyms != NULL
5625 && (symtab_hdr->contents != (unsigned char *) locsyms))
5626 {
5627 if (!info->keep_memory)
5628 free (locsyms);
5629 else
5630 symtab_hdr->contents = (unsigned char *) locsyms;
5631 }
5632 }
5633 return TRUE;
5634 }
5635 \f
5636 /* Return true if we have dynamic relocs that apply to read-only sections. */
5637
5638 static bfd_boolean
5639 readonly_dynrelocs (struct elf_link_hash_entry *h)
5640 {
5641 struct elf_dyn_relocs *p;
5642
5643 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5644 {
5645 asection *s = p->sec->output_section;
5646
5647 if (s != NULL
5648 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5649 == (SEC_READONLY | SEC_ALLOC)))
5650 return TRUE;
5651 }
5652 return FALSE;
5653 }
5654
5655 /* Adjust a symbol defined by a dynamic object and referenced by a
5656 regular object. The current definition is in some section of the
5657 dynamic object, but we're not including those sections. We have to
5658 change the definition to something the rest of the link can
5659 understand. */
5660
5661 static bfd_boolean
5662 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5663 struct elf_link_hash_entry *h)
5664 {
5665 struct ppc_elf_link_hash_table *htab;
5666 asection *s;
5667
5668 #ifdef DEBUG
5669 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5670 h->root.root.string);
5671 #endif
5672
5673 /* Make sure we know what is going on here. */
5674 htab = ppc_elf_hash_table (info);
5675 BFD_ASSERT (htab->elf.dynobj != NULL
5676 && (h->needs_plt
5677 || h->type == STT_GNU_IFUNC
5678 || h->u.weakdef != NULL
5679 || (h->def_dynamic
5680 && h->ref_regular
5681 && !h->def_regular)));
5682
5683 /* Deal with function syms. */
5684 if (h->type == STT_FUNC
5685 || h->type == STT_GNU_IFUNC
5686 || h->needs_plt)
5687 {
5688 /* Clear procedure linkage table information for any symbol that
5689 won't need a .plt entry. */
5690 struct plt_entry *ent;
5691 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5692 if (ent->plt.refcount > 0)
5693 break;
5694 if (ent == NULL
5695 || (h->type != STT_GNU_IFUNC
5696 && (SYMBOL_CALLS_LOCAL (info, h)
5697 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5698 && h->root.type == bfd_link_hash_undefweak))))
5699 {
5700 /* A PLT entry is not required/allowed when:
5701
5702 1. We are not using ld.so; because then the PLT entry
5703 can't be set up, so we can't use one. In this case,
5704 ppc_elf_adjust_dynamic_symbol won't even be called.
5705
5706 2. GC has rendered the entry unused.
5707
5708 3. We know for certain that a call to this symbol
5709 will go to this object, or will remain undefined. */
5710 h->plt.plist = NULL;
5711 h->needs_plt = 0;
5712 h->pointer_equality_needed = 0;
5713 }
5714 else
5715 {
5716 /* Taking a function's address in a read/write section
5717 doesn't require us to define the function symbol in the
5718 executable on a plt call stub. A dynamic reloc can
5719 be used instead. */
5720 if (h->pointer_equality_needed
5721 && h->type != STT_GNU_IFUNC
5722 && !htab->is_vxworks
5723 && !ppc_elf_hash_entry (h)->has_sda_refs
5724 && !readonly_dynrelocs (h))
5725 {
5726 h->pointer_equality_needed = 0;
5727 h->non_got_ref = 0;
5728 }
5729
5730 /* After adjust_dynamic_symbol, non_got_ref set in the
5731 non-shared case means that we have allocated space in
5732 .dynbss for the symbol and thus dyn_relocs for this
5733 symbol should be discarded.
5734 If we get here we know we are making a PLT entry for this
5735 symbol, and in an executable we'd normally resolve
5736 relocations against this symbol to the PLT entry. Allow
5737 dynamic relocs if the reference is weak, and the dynamic
5738 relocs will not cause text relocation. */
5739 else if (!h->ref_regular_nonweak
5740 && h->non_got_ref
5741 && h->type != STT_GNU_IFUNC
5742 && !htab->is_vxworks
5743 && !ppc_elf_hash_entry (h)->has_sda_refs
5744 && !readonly_dynrelocs (h))
5745 h->non_got_ref = 0;
5746 }
5747 h->protected_def = 0;
5748 return TRUE;
5749 }
5750 else
5751 h->plt.plist = NULL;
5752
5753 /* If this is a weak symbol, and there is a real definition, the
5754 processor independent code will have arranged for us to see the
5755 real definition first, and we can just use the same value. */
5756 if (h->u.weakdef != NULL)
5757 {
5758 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5759 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5760 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5761 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5762 if (ELIMINATE_COPY_RELOCS)
5763 h->non_got_ref = h->u.weakdef->non_got_ref;
5764 return TRUE;
5765 }
5766
5767 /* This is a reference to a symbol defined by a dynamic object which
5768 is not a function. */
5769
5770 /* If we are creating a shared library, we must presume that the
5771 only references to the symbol are via the global offset table.
5772 For such cases we need not do anything here; the relocations will
5773 be handled correctly by relocate_section. */
5774 if (bfd_link_pic (info))
5775 {
5776 h->protected_def = 0;
5777 return TRUE;
5778 }
5779
5780 /* If there are no references to this symbol that do not use the
5781 GOT, we don't need to generate a copy reloc. */
5782 if (!h->non_got_ref)
5783 {
5784 h->protected_def = 0;
5785 return TRUE;
5786 }
5787
5788 /* Protected variables do not work with .dynbss. The copy in
5789 .dynbss won't be used by the shared library with the protected
5790 definition for the variable. Editing to PIC, or text relocations
5791 are preferable to an incorrect program. */
5792 if (h->protected_def)
5793 {
5794 if (ELIMINATE_COPY_RELOCS
5795 && ppc_elf_hash_entry (h)->has_addr16_ha
5796 && ppc_elf_hash_entry (h)->has_addr16_lo
5797 && htab->params->pic_fixup == 0
5798 && info->disable_target_specific_optimizations <= 1)
5799 htab->params->pic_fixup = 1;
5800 h->non_got_ref = 0;
5801 return TRUE;
5802 }
5803
5804 /* If -z nocopyreloc was given, we won't generate them either. */
5805 if (info->nocopyreloc)
5806 {
5807 h->non_got_ref = 0;
5808 return TRUE;
5809 }
5810
5811 /* If we didn't find any dynamic relocs in read-only sections, then
5812 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5813 We can't do this if there are any small data relocations. This
5814 doesn't work on VxWorks, where we can not have dynamic
5815 relocations (other than copy and jump slot relocations) in an
5816 executable. */
5817 if (ELIMINATE_COPY_RELOCS
5818 && !ppc_elf_hash_entry (h)->has_sda_refs
5819 && !htab->is_vxworks
5820 && !h->def_regular
5821 && !readonly_dynrelocs (h))
5822 {
5823 h->non_got_ref = 0;
5824 return TRUE;
5825 }
5826
5827 /* We must allocate the symbol in our .dynbss section, which will
5828 become part of the .bss section of the executable. There will be
5829 an entry for this symbol in the .dynsym section. The dynamic
5830 object will contain position independent code, so all references
5831 from the dynamic object to this symbol will go through the global
5832 offset table. The dynamic linker will use the .dynsym entry to
5833 determine the address it must put in the global offset table, so
5834 both the dynamic object and the regular object will refer to the
5835 same memory location for the variable.
5836
5837 Of course, if the symbol is referenced using SDAREL relocs, we
5838 must instead allocate it in .sbss. */
5839
5840 if (ppc_elf_hash_entry (h)->has_sda_refs)
5841 s = htab->dynsbss;
5842 else
5843 s = htab->dynbss;
5844 BFD_ASSERT (s != NULL);
5845
5846 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5847 copy the initial value out of the dynamic object and into the
5848 runtime process image. We need to remember the offset into the
5849 .rela.bss section we are going to use. */
5850 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5851 {
5852 asection *srel;
5853
5854 if (ppc_elf_hash_entry (h)->has_sda_refs)
5855 srel = htab->relsbss;
5856 else
5857 srel = htab->relbss;
5858 BFD_ASSERT (srel != NULL);
5859 srel->size += sizeof (Elf32_External_Rela);
5860 h->needs_copy = 1;
5861 }
5862
5863 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5864 }
5865 \f
5866 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5867 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5868 specifying the addend on the plt relocation. For -fpic code, the sym
5869 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5870 xxxxxxxx.got2.plt_pic32.<callee>. */
5871
5872 static bfd_boolean
5873 add_stub_sym (struct plt_entry *ent,
5874 struct elf_link_hash_entry *h,
5875 struct bfd_link_info *info)
5876 {
5877 struct elf_link_hash_entry *sh;
5878 size_t len1, len2, len3;
5879 char *name;
5880 const char *stub;
5881 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5882
5883 if (bfd_link_pic (info))
5884 stub = ".plt_pic32.";
5885 else
5886 stub = ".plt_call32.";
5887
5888 len1 = strlen (h->root.root.string);
5889 len2 = strlen (stub);
5890 len3 = 0;
5891 if (ent->sec)
5892 len3 = strlen (ent->sec->name);
5893 name = bfd_malloc (len1 + len2 + len3 + 9);
5894 if (name == NULL)
5895 return FALSE;
5896 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5897 if (ent->sec)
5898 memcpy (name + 8, ent->sec->name, len3);
5899 memcpy (name + 8 + len3, stub, len2);
5900 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5901 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5902 if (sh == NULL)
5903 return FALSE;
5904 if (sh->root.type == bfd_link_hash_new)
5905 {
5906 sh->root.type = bfd_link_hash_defined;
5907 sh->root.u.def.section = htab->glink;
5908 sh->root.u.def.value = ent->glink_offset;
5909 sh->ref_regular = 1;
5910 sh->def_regular = 1;
5911 sh->ref_regular_nonweak = 1;
5912 sh->forced_local = 1;
5913 sh->non_elf = 0;
5914 sh->root.linker_def = 1;
5915 }
5916 return TRUE;
5917 }
5918
5919 /* Allocate NEED contiguous space in .got, and return the offset.
5920 Handles allocation of the got header when crossing 32k. */
5921
5922 static bfd_vma
5923 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5924 {
5925 bfd_vma where;
5926 unsigned int max_before_header;
5927
5928 if (htab->plt_type == PLT_VXWORKS)
5929 {
5930 where = htab->got->size;
5931 htab->got->size += need;
5932 }
5933 else
5934 {
5935 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5936 if (need <= htab->got_gap)
5937 {
5938 where = max_before_header - htab->got_gap;
5939 htab->got_gap -= need;
5940 }
5941 else
5942 {
5943 if (htab->got->size + need > max_before_header
5944 && htab->got->size <= max_before_header)
5945 {
5946 htab->got_gap = max_before_header - htab->got->size;
5947 htab->got->size = max_before_header + htab->got_header_size;
5948 }
5949 where = htab->got->size;
5950 htab->got->size += need;
5951 }
5952 }
5953 return where;
5954 }
5955
5956 /* Allocate space in associated reloc sections for dynamic relocs. */
5957
5958 static bfd_boolean
5959 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5960 {
5961 struct bfd_link_info *info = inf;
5962 struct ppc_elf_link_hash_entry *eh;
5963 struct ppc_elf_link_hash_table *htab;
5964 struct elf_dyn_relocs *p;
5965
5966 if (h->root.type == bfd_link_hash_indirect)
5967 return TRUE;
5968
5969 htab = ppc_elf_hash_table (info);
5970 if (htab->elf.dynamic_sections_created
5971 || h->type == STT_GNU_IFUNC)
5972 {
5973 struct plt_entry *ent;
5974 bfd_boolean doneone = FALSE;
5975 bfd_vma plt_offset = 0, glink_offset = 0;
5976 bfd_boolean dyn;
5977
5978 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5979 if (ent->plt.refcount > 0)
5980 {
5981 /* Make sure this symbol is output as a dynamic symbol. */
5982 if (h->dynindx == -1
5983 && !h->forced_local
5984 && !h->def_regular
5985 && htab->elf.dynamic_sections_created)
5986 {
5987 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5988 return FALSE;
5989 }
5990
5991 dyn = htab->elf.dynamic_sections_created;
5992 if (bfd_link_pic (info)
5993 || h->type == STT_GNU_IFUNC
5994 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5995 {
5996 asection *s = htab->plt;
5997 if (!dyn || h->dynindx == -1)
5998 s = htab->iplt;
5999
6000 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
6001 {
6002 if (!doneone)
6003 {
6004 plt_offset = s->size;
6005 s->size += 4;
6006 }
6007 ent->plt.offset = plt_offset;
6008
6009 s = htab->glink;
6010 if (!doneone || bfd_link_pic (info))
6011 {
6012 glink_offset = s->size;
6013 s->size += GLINK_ENTRY_SIZE;
6014 if (h == htab->tls_get_addr
6015 && !htab->params->no_tls_get_addr_opt)
6016 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6017 }
6018 if (!doneone
6019 && !bfd_link_pic (info)
6020 && h->def_dynamic
6021 && !h->def_regular)
6022 {
6023 h->root.u.def.section = s;
6024 h->root.u.def.value = glink_offset;
6025 }
6026 ent->glink_offset = glink_offset;
6027
6028 if (htab->params->emit_stub_syms
6029 && !add_stub_sym (ent, h, info))
6030 return FALSE;
6031 }
6032 else
6033 {
6034 if (!doneone)
6035 {
6036 /* If this is the first .plt entry, make room
6037 for the special first entry. */
6038 if (s->size == 0)
6039 s->size += htab->plt_initial_entry_size;
6040
6041 /* The PowerPC PLT is actually composed of two
6042 parts, the first part is 2 words (for a load
6043 and a jump), and then there is a remaining
6044 word available at the end. */
6045 plt_offset = (htab->plt_initial_entry_size
6046 + (htab->plt_slot_size
6047 * ((s->size
6048 - htab->plt_initial_entry_size)
6049 / htab->plt_entry_size)));
6050
6051 /* If this symbol is not defined in a regular
6052 file, and we are not generating a shared
6053 library, then set the symbol to this location
6054 in the .plt. This is to avoid text
6055 relocations, and is required to make
6056 function pointers compare as equal between
6057 the normal executable and the shared library. */
6058 if (! bfd_link_pic (info)
6059 && h->def_dynamic
6060 && !h->def_regular)
6061 {
6062 h->root.u.def.section = s;
6063 h->root.u.def.value = plt_offset;
6064 }
6065
6066 /* Make room for this entry. */
6067 s->size += htab->plt_entry_size;
6068 /* After the 8192nd entry, room for two entries
6069 is allocated. */
6070 if (htab->plt_type == PLT_OLD
6071 && (s->size - htab->plt_initial_entry_size)
6072 / htab->plt_entry_size
6073 > PLT_NUM_SINGLE_ENTRIES)
6074 s->size += htab->plt_entry_size;
6075 }
6076 ent->plt.offset = plt_offset;
6077 }
6078
6079 /* We also need to make an entry in the .rela.plt section. */
6080 if (!doneone)
6081 {
6082 if (!htab->elf.dynamic_sections_created
6083 || h->dynindx == -1)
6084 htab->reliplt->size += sizeof (Elf32_External_Rela);
6085 else
6086 {
6087 htab->relplt->size += sizeof (Elf32_External_Rela);
6088
6089 if (htab->plt_type == PLT_VXWORKS)
6090 {
6091 /* Allocate space for the unloaded relocations. */
6092 if (!bfd_link_pic (info)
6093 && htab->elf.dynamic_sections_created)
6094 {
6095 if (ent->plt.offset
6096 == (bfd_vma) htab->plt_initial_entry_size)
6097 {
6098 htab->srelplt2->size
6099 += (sizeof (Elf32_External_Rela)
6100 * VXWORKS_PLTRESOLVE_RELOCS);
6101 }
6102
6103 htab->srelplt2->size
6104 += (sizeof (Elf32_External_Rela)
6105 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6106 }
6107
6108 /* Every PLT entry has an associated GOT entry in
6109 .got.plt. */
6110 htab->sgotplt->size += 4;
6111 }
6112 }
6113 doneone = TRUE;
6114 }
6115 }
6116 else
6117 ent->plt.offset = (bfd_vma) -1;
6118 }
6119 else
6120 ent->plt.offset = (bfd_vma) -1;
6121
6122 if (!doneone)
6123 {
6124 h->plt.plist = NULL;
6125 h->needs_plt = 0;
6126 }
6127 }
6128 else
6129 {
6130 h->plt.plist = NULL;
6131 h->needs_plt = 0;
6132 }
6133
6134 eh = (struct ppc_elf_link_hash_entry *) h;
6135 if (eh->elf.got.refcount > 0
6136 || (ELIMINATE_COPY_RELOCS
6137 && !eh->elf.def_regular
6138 && eh->elf.protected_def
6139 && eh->has_addr16_ha
6140 && eh->has_addr16_lo
6141 && htab->params->pic_fixup > 0))
6142 {
6143 bfd_boolean dyn;
6144 unsigned int need;
6145
6146 /* Make sure this symbol is output as a dynamic symbol. */
6147 if (eh->elf.dynindx == -1
6148 && !eh->elf.forced_local
6149 && eh->elf.type != STT_GNU_IFUNC
6150 && htab->elf.dynamic_sections_created)
6151 {
6152 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6153 return FALSE;
6154 }
6155
6156 need = 0;
6157 if ((eh->tls_mask & TLS_TLS) != 0)
6158 {
6159 if ((eh->tls_mask & TLS_LD) != 0)
6160 {
6161 if (!eh->elf.def_dynamic)
6162 /* We'll just use htab->tlsld_got.offset. This should
6163 always be the case. It's a little odd if we have
6164 a local dynamic reloc against a non-local symbol. */
6165 htab->tlsld_got.refcount += 1;
6166 else
6167 need += 8;
6168 }
6169 if ((eh->tls_mask & TLS_GD) != 0)
6170 need += 8;
6171 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6172 need += 4;
6173 if ((eh->tls_mask & TLS_DTPREL) != 0)
6174 need += 4;
6175 }
6176 else
6177 need += 4;
6178 if (need == 0)
6179 eh->elf.got.offset = (bfd_vma) -1;
6180 else
6181 {
6182 eh->elf.got.offset = allocate_got (htab, need);
6183 dyn = htab->elf.dynamic_sections_created;
6184 if ((bfd_link_pic (info)
6185 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6186 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6187 || eh->elf.root.type != bfd_link_hash_undefweak))
6188 {
6189 asection *rsec = htab->relgot;
6190
6191 if (eh->elf.type == STT_GNU_IFUNC)
6192 rsec = htab->reliplt;
6193 /* All the entries we allocated need relocs.
6194 Except LD only needs one. */
6195 if ((eh->tls_mask & TLS_LD) != 0
6196 && eh->elf.def_dynamic)
6197 need -= 4;
6198 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6199 }
6200 }
6201 }
6202 else
6203 eh->elf.got.offset = (bfd_vma) -1;
6204
6205 if (eh->dyn_relocs == NULL
6206 || !htab->elf.dynamic_sections_created)
6207 return TRUE;
6208
6209 /* In the shared -Bsymbolic case, discard space allocated for
6210 dynamic pc-relative relocs against symbols which turn out to be
6211 defined in regular objects. For the normal shared case, discard
6212 space for relocs that have become local due to symbol visibility
6213 changes. */
6214
6215 if (bfd_link_pic (info))
6216 {
6217 /* Relocs that use pc_count are those that appear on a call insn,
6218 or certain REL relocs (see must_be_dyn_reloc) that can be
6219 generated via assembly. We want calls to protected symbols to
6220 resolve directly to the function rather than going via the plt.
6221 If people want function pointer comparisons to work as expected
6222 then they should avoid writing weird assembly. */
6223 if (SYMBOL_CALLS_LOCAL (info, h))
6224 {
6225 struct elf_dyn_relocs **pp;
6226
6227 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6228 {
6229 p->count -= p->pc_count;
6230 p->pc_count = 0;
6231 if (p->count == 0)
6232 *pp = p->next;
6233 else
6234 pp = &p->next;
6235 }
6236 }
6237
6238 if (htab->is_vxworks)
6239 {
6240 struct elf_dyn_relocs **pp;
6241
6242 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6243 {
6244 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6245 *pp = p->next;
6246 else
6247 pp = &p->next;
6248 }
6249 }
6250
6251 /* Discard relocs on undefined symbols that must be local. */
6252 if (eh->dyn_relocs != NULL
6253 && h->root.type == bfd_link_hash_undefined
6254 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6255 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6256 eh->dyn_relocs = NULL;
6257
6258 /* Also discard relocs on undefined weak syms with non-default
6259 visibility. */
6260 if (eh->dyn_relocs != NULL
6261 && h->root.type == bfd_link_hash_undefweak)
6262 {
6263 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6264 eh->dyn_relocs = NULL;
6265
6266 /* Make sure undefined weak symbols are output as a dynamic
6267 symbol in PIEs. */
6268 else if (h->dynindx == -1
6269 && !h->forced_local
6270 && !h->def_regular)
6271 {
6272 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6273 return FALSE;
6274 }
6275 }
6276 }
6277 else if (ELIMINATE_COPY_RELOCS)
6278 {
6279 /* For the non-shared case, discard space for relocs against
6280 symbols which turn out to need copy relocs or are not
6281 dynamic. */
6282
6283 if (!h->non_got_ref
6284 && !h->def_regular
6285 && !(h->protected_def
6286 && eh->has_addr16_ha
6287 && eh->has_addr16_lo
6288 && htab->params->pic_fixup > 0))
6289 {
6290 /* Make sure this symbol is output as a dynamic symbol.
6291 Undefined weak syms won't yet be marked as dynamic. */
6292 if (h->dynindx == -1
6293 && !h->forced_local)
6294 {
6295 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6296 return FALSE;
6297 }
6298
6299 /* If that succeeded, we know we'll be keeping all the
6300 relocs. */
6301 if (h->dynindx != -1)
6302 goto keep;
6303 }
6304
6305 eh->dyn_relocs = NULL;
6306
6307 keep: ;
6308 }
6309
6310 /* Finally, allocate space. */
6311 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6312 {
6313 asection *sreloc = elf_section_data (p->sec)->sreloc;
6314 if (eh->elf.type == STT_GNU_IFUNC)
6315 sreloc = htab->reliplt;
6316 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6317 }
6318
6319 return TRUE;
6320 }
6321
6322 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6323 read-only sections. */
6324
6325 static bfd_boolean
6326 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6327 {
6328 if (h->root.type == bfd_link_hash_indirect)
6329 return TRUE;
6330
6331 if (readonly_dynrelocs (h))
6332 {
6333 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6334
6335 /* Not an error, just cut short the traversal. */
6336 return FALSE;
6337 }
6338 return TRUE;
6339 }
6340
6341 static const unsigned char glink_eh_frame_cie[] =
6342 {
6343 0, 0, 0, 16, /* length. */
6344 0, 0, 0, 0, /* id. */
6345 1, /* CIE version. */
6346 'z', 'R', 0, /* Augmentation string. */
6347 4, /* Code alignment. */
6348 0x7c, /* Data alignment. */
6349 65, /* RA reg. */
6350 1, /* Augmentation size. */
6351 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6352 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6353 };
6354
6355 /* Set the sizes of the dynamic sections. */
6356
6357 static bfd_boolean
6358 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6359 struct bfd_link_info *info)
6360 {
6361 struct ppc_elf_link_hash_table *htab;
6362 asection *s;
6363 bfd_boolean relocs;
6364 bfd *ibfd;
6365
6366 #ifdef DEBUG
6367 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6368 #endif
6369
6370 htab = ppc_elf_hash_table (info);
6371 BFD_ASSERT (htab->elf.dynobj != NULL);
6372
6373 if (elf_hash_table (info)->dynamic_sections_created)
6374 {
6375 /* Set the contents of the .interp section to the interpreter. */
6376 if (bfd_link_executable (info) && !info->nointerp)
6377 {
6378 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6379 BFD_ASSERT (s != NULL);
6380 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6381 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6382 }
6383 }
6384
6385 if (htab->plt_type == PLT_OLD)
6386 htab->got_header_size = 16;
6387 else if (htab->plt_type == PLT_NEW)
6388 htab->got_header_size = 12;
6389
6390 /* Set up .got offsets for local syms, and space for local dynamic
6391 relocs. */
6392 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6393 {
6394 bfd_signed_vma *local_got;
6395 bfd_signed_vma *end_local_got;
6396 struct plt_entry **local_plt;
6397 struct plt_entry **end_local_plt;
6398 char *lgot_masks;
6399 bfd_size_type locsymcount;
6400 Elf_Internal_Shdr *symtab_hdr;
6401
6402 if (!is_ppc_elf (ibfd))
6403 continue;
6404
6405 for (s = ibfd->sections; s != NULL; s = s->next)
6406 {
6407 struct ppc_dyn_relocs *p;
6408
6409 for (p = ((struct ppc_dyn_relocs *)
6410 elf_section_data (s)->local_dynrel);
6411 p != NULL;
6412 p = p->next)
6413 {
6414 if (!bfd_is_abs_section (p->sec)
6415 && bfd_is_abs_section (p->sec->output_section))
6416 {
6417 /* Input section has been discarded, either because
6418 it is a copy of a linkonce section or due to
6419 linker script /DISCARD/, so we'll be discarding
6420 the relocs too. */
6421 }
6422 else if (htab->is_vxworks
6423 && strcmp (p->sec->output_section->name,
6424 ".tls_vars") == 0)
6425 {
6426 /* Relocations in vxworks .tls_vars sections are
6427 handled specially by the loader. */
6428 }
6429 else if (p->count != 0)
6430 {
6431 asection *sreloc = elf_section_data (p->sec)->sreloc;
6432 if (p->ifunc)
6433 sreloc = htab->reliplt;
6434 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6435 if ((p->sec->output_section->flags
6436 & (SEC_READONLY | SEC_ALLOC))
6437 == (SEC_READONLY | SEC_ALLOC))
6438 info->flags |= DF_TEXTREL;
6439 }
6440 }
6441 }
6442
6443 local_got = elf_local_got_refcounts (ibfd);
6444 if (!local_got)
6445 continue;
6446
6447 symtab_hdr = &elf_symtab_hdr (ibfd);
6448 locsymcount = symtab_hdr->sh_info;
6449 end_local_got = local_got + locsymcount;
6450 local_plt = (struct plt_entry **) end_local_got;
6451 end_local_plt = local_plt + locsymcount;
6452 lgot_masks = (char *) end_local_plt;
6453
6454 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6455 if (*local_got > 0)
6456 {
6457 unsigned int need = 0;
6458 if ((*lgot_masks & TLS_TLS) != 0)
6459 {
6460 if ((*lgot_masks & TLS_GD) != 0)
6461 need += 8;
6462 if ((*lgot_masks & TLS_LD) != 0)
6463 htab->tlsld_got.refcount += 1;
6464 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6465 need += 4;
6466 if ((*lgot_masks & TLS_DTPREL) != 0)
6467 need += 4;
6468 }
6469 else
6470 need += 4;
6471 if (need == 0)
6472 *local_got = (bfd_vma) -1;
6473 else
6474 {
6475 *local_got = allocate_got (htab, need);
6476 if (bfd_link_pic (info))
6477 {
6478 asection *srel = htab->relgot;
6479 if ((*lgot_masks & PLT_IFUNC) != 0)
6480 srel = htab->reliplt;
6481 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6482 }
6483 }
6484 }
6485 else
6486 *local_got = (bfd_vma) -1;
6487
6488 if (htab->is_vxworks)
6489 continue;
6490
6491 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6492 for (; local_plt < end_local_plt; ++local_plt)
6493 {
6494 struct plt_entry *ent;
6495 bfd_boolean doneone = FALSE;
6496 bfd_vma plt_offset = 0, glink_offset = 0;
6497
6498 for (ent = *local_plt; ent != NULL; ent = ent->next)
6499 if (ent->plt.refcount > 0)
6500 {
6501 s = htab->iplt;
6502
6503 if (!doneone)
6504 {
6505 plt_offset = s->size;
6506 s->size += 4;
6507 }
6508 ent->plt.offset = plt_offset;
6509
6510 s = htab->glink;
6511 if (!doneone || bfd_link_pic (info))
6512 {
6513 glink_offset = s->size;
6514 s->size += GLINK_ENTRY_SIZE;
6515 }
6516 ent->glink_offset = glink_offset;
6517
6518 if (!doneone)
6519 {
6520 htab->reliplt->size += sizeof (Elf32_External_Rela);
6521 doneone = TRUE;
6522 }
6523 }
6524 else
6525 ent->plt.offset = (bfd_vma) -1;
6526 }
6527 }
6528
6529 /* Allocate space for global sym dynamic relocs. */
6530 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6531
6532 if (htab->tlsld_got.refcount > 0)
6533 {
6534 htab->tlsld_got.offset = allocate_got (htab, 8);
6535 if (bfd_link_pic (info))
6536 htab->relgot->size += sizeof (Elf32_External_Rela);
6537 }
6538 else
6539 htab->tlsld_got.offset = (bfd_vma) -1;
6540
6541 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6542 {
6543 unsigned int g_o_t = 32768;
6544
6545 /* If we haven't allocated the header, do so now. When we get here,
6546 for old plt/got the got size will be 0 to 32764 (not allocated),
6547 or 32780 to 65536 (header allocated). For new plt/got, the
6548 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6549 if (htab->got->size <= 32768)
6550 {
6551 g_o_t = htab->got->size;
6552 if (htab->plt_type == PLT_OLD)
6553 g_o_t += 4;
6554 htab->got->size += htab->got_header_size;
6555 }
6556
6557 htab->elf.hgot->root.u.def.value = g_o_t;
6558 }
6559 if (bfd_link_pic (info))
6560 {
6561 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6562
6563 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6564 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6565 }
6566 if (info->emitrelocations)
6567 {
6568 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6569
6570 if (sda != NULL && sda->ref_regular)
6571 sda->root.u.def.section->flags |= SEC_KEEP;
6572 sda = htab->sdata[1].sym;
6573 if (sda != NULL && sda->ref_regular)
6574 sda->root.u.def.section->flags |= SEC_KEEP;
6575 }
6576
6577 if (htab->glink != NULL
6578 && htab->glink->size != 0
6579 && htab->elf.dynamic_sections_created)
6580 {
6581 htab->glink_pltresolve = htab->glink->size;
6582 /* Space for the branch table. ??? We don't need entries for
6583 non-dynamic symbols in this table. This case can arise with
6584 static ifuncs or forced local ifuncs. */
6585 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6586 /* Pad out to align the start of PLTresolve. */
6587 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6588 ? 63 : 15);
6589 htab->glink->size += GLINK_PLTRESOLVE;
6590
6591 if (htab->params->emit_stub_syms)
6592 {
6593 struct elf_link_hash_entry *sh;
6594 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6595 TRUE, FALSE, FALSE);
6596 if (sh == NULL)
6597 return FALSE;
6598 if (sh->root.type == bfd_link_hash_new)
6599 {
6600 sh->root.type = bfd_link_hash_defined;
6601 sh->root.u.def.section = htab->glink;
6602 sh->root.u.def.value = htab->glink_pltresolve;
6603 sh->ref_regular = 1;
6604 sh->def_regular = 1;
6605 sh->ref_regular_nonweak = 1;
6606 sh->forced_local = 1;
6607 sh->non_elf = 0;
6608 sh->root.linker_def = 1;
6609 }
6610 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6611 TRUE, FALSE, FALSE);
6612 if (sh == NULL)
6613 return FALSE;
6614 if (sh->root.type == bfd_link_hash_new)
6615 {
6616 sh->root.type = bfd_link_hash_defined;
6617 sh->root.u.def.section = htab->glink;
6618 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6619 sh->ref_regular = 1;
6620 sh->def_regular = 1;
6621 sh->ref_regular_nonweak = 1;
6622 sh->forced_local = 1;
6623 sh->non_elf = 0;
6624 sh->root.linker_def = 1;
6625 }
6626 }
6627 }
6628
6629 if (htab->glink != NULL
6630 && htab->glink->size != 0
6631 && htab->glink_eh_frame != NULL
6632 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6633 && _bfd_elf_eh_frame_present (info))
6634 {
6635 s = htab->glink_eh_frame;
6636 s->size = sizeof (glink_eh_frame_cie) + 20;
6637 if (bfd_link_pic (info))
6638 {
6639 s->size += 4;
6640 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6641 s->size += 4;
6642 }
6643 }
6644
6645 /* We've now determined the sizes of the various dynamic sections.
6646 Allocate memory for them. */
6647 relocs = FALSE;
6648 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6649 {
6650 bfd_boolean strip_section = TRUE;
6651
6652 if ((s->flags & SEC_LINKER_CREATED) == 0)
6653 continue;
6654
6655 if (s == htab->plt
6656 || s == htab->got)
6657 {
6658 /* We'd like to strip these sections if they aren't needed, but if
6659 we've exported dynamic symbols from them we must leave them.
6660 It's too late to tell BFD to get rid of the symbols. */
6661 if (htab->elf.hplt != NULL)
6662 strip_section = FALSE;
6663 /* Strip this section if we don't need it; see the
6664 comment below. */
6665 }
6666 else if (s == htab->iplt
6667 || s == htab->glink
6668 || s == htab->glink_eh_frame
6669 || s == htab->sgotplt
6670 || s == htab->sbss
6671 || s == htab->dynbss
6672 || s == htab->dynsbss)
6673 {
6674 /* Strip these too. */
6675 }
6676 else if (s == htab->sdata[0].section
6677 || s == htab->sdata[1].section)
6678 {
6679 strip_section = (s->flags & SEC_KEEP) == 0;
6680 }
6681 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6682 ".rela"))
6683 {
6684 if (s->size != 0)
6685 {
6686 /* Remember whether there are any relocation sections. */
6687 relocs = TRUE;
6688
6689 /* We use the reloc_count field as a counter if we need
6690 to copy relocs into the output file. */
6691 s->reloc_count = 0;
6692 }
6693 }
6694 else
6695 {
6696 /* It's not one of our sections, so don't allocate space. */
6697 continue;
6698 }
6699
6700 if (s->size == 0 && strip_section)
6701 {
6702 /* If we don't need this section, strip it from the
6703 output file. This is mostly to handle .rela.bss and
6704 .rela.plt. We must create both sections in
6705 create_dynamic_sections, because they must be created
6706 before the linker maps input sections to output
6707 sections. The linker does that before
6708 adjust_dynamic_symbol is called, and it is that
6709 function which decides whether anything needs to go
6710 into these sections. */
6711 s->flags |= SEC_EXCLUDE;
6712 continue;
6713 }
6714
6715 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6716 continue;
6717
6718 /* Allocate memory for the section contents. */
6719 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6720 if (s->contents == NULL)
6721 return FALSE;
6722 }
6723
6724 if (htab->elf.dynamic_sections_created)
6725 {
6726 /* Add some entries to the .dynamic section. We fill in the
6727 values later, in ppc_elf_finish_dynamic_sections, but we
6728 must add the entries now so that we get the correct size for
6729 the .dynamic section. The DT_DEBUG entry is filled in by the
6730 dynamic linker and used by the debugger. */
6731 #define add_dynamic_entry(TAG, VAL) \
6732 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6733
6734 if (bfd_link_executable (info))
6735 {
6736 if (!add_dynamic_entry (DT_DEBUG, 0))
6737 return FALSE;
6738 }
6739
6740 if (htab->plt != NULL && htab->plt->size != 0)
6741 {
6742 if (!add_dynamic_entry (DT_PLTGOT, 0)
6743 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6744 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6745 || !add_dynamic_entry (DT_JMPREL, 0))
6746 return FALSE;
6747 }
6748
6749 if (htab->plt_type == PLT_NEW
6750 && htab->glink != NULL
6751 && htab->glink->size != 0)
6752 {
6753 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6754 return FALSE;
6755 if (!htab->params->no_tls_get_addr_opt
6756 && htab->tls_get_addr != NULL
6757 && htab->tls_get_addr->plt.plist != NULL
6758 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6759 return FALSE;
6760 }
6761
6762 if (relocs)
6763 {
6764 if (!add_dynamic_entry (DT_RELA, 0)
6765 || !add_dynamic_entry (DT_RELASZ, 0)
6766 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6767 return FALSE;
6768 }
6769
6770 /* If any dynamic relocs apply to a read-only section, then we
6771 need a DT_TEXTREL entry. */
6772 if ((info->flags & DF_TEXTREL) == 0)
6773 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6774 info);
6775
6776 if ((info->flags & DF_TEXTREL) != 0)
6777 {
6778 if (!add_dynamic_entry (DT_TEXTREL, 0))
6779 return FALSE;
6780 }
6781 if (htab->is_vxworks
6782 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6783 return FALSE;
6784 }
6785 #undef add_dynamic_entry
6786
6787 if (htab->glink_eh_frame != NULL
6788 && htab->glink_eh_frame->contents != NULL)
6789 {
6790 unsigned char *p = htab->glink_eh_frame->contents;
6791 bfd_vma val;
6792
6793 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6794 /* CIE length (rewrite in case little-endian). */
6795 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6796 p += sizeof (glink_eh_frame_cie);
6797 /* FDE length. */
6798 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6799 bfd_put_32 (htab->elf.dynobj, val, p);
6800 p += 4;
6801 /* CIE pointer. */
6802 val = p - htab->glink_eh_frame->contents;
6803 bfd_put_32 (htab->elf.dynobj, val, p);
6804 p += 4;
6805 /* Offset to .glink. Set later. */
6806 p += 4;
6807 /* .glink size. */
6808 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6809 p += 4;
6810 /* Augmentation. */
6811 p += 1;
6812
6813 if (bfd_link_pic (info)
6814 && htab->elf.dynamic_sections_created)
6815 {
6816 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6817 if (adv < 64)
6818 *p++ = DW_CFA_advance_loc + adv;
6819 else if (adv < 256)
6820 {
6821 *p++ = DW_CFA_advance_loc1;
6822 *p++ = adv;
6823 }
6824 else if (adv < 65536)
6825 {
6826 *p++ = DW_CFA_advance_loc2;
6827 bfd_put_16 (htab->elf.dynobj, adv, p);
6828 p += 2;
6829 }
6830 else
6831 {
6832 *p++ = DW_CFA_advance_loc4;
6833 bfd_put_32 (htab->elf.dynobj, adv, p);
6834 p += 4;
6835 }
6836 *p++ = DW_CFA_register;
6837 *p++ = 65;
6838 p++;
6839 *p++ = DW_CFA_advance_loc + 4;
6840 *p++ = DW_CFA_restore_extended;
6841 *p++ = 65;
6842 }
6843 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6844 == htab->glink_eh_frame->size);
6845 }
6846
6847 return TRUE;
6848 }
6849
6850 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6851 if it looks like nothing is using them. */
6852
6853 static void
6854 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6855 {
6856 struct elf_link_hash_entry *sda = lsect->sym;
6857
6858 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6859 {
6860 asection *s;
6861
6862 s = bfd_get_section_by_name (output_bfd, lsect->name);
6863 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6864 {
6865 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6866 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6867 {
6868 sda->def_regular = 0;
6869 /* This is somewhat magic. See elf_link_output_extsym. */
6870 sda->ref_dynamic = 1;
6871 sda->forced_local = 0;
6872 }
6873 }
6874 }
6875 }
6876
6877 void
6878 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6879 {
6880 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6881
6882 if (htab != NULL)
6883 {
6884 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6885 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6886 }
6887 }
6888
6889
6890 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6891
6892 static bfd_boolean
6893 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6894 {
6895 if (h->plt.plist != NULL
6896 && !h->def_regular
6897 && (!h->pointer_equality_needed
6898 || !h->ref_regular_nonweak))
6899 return FALSE;
6900
6901 return _bfd_elf_hash_symbol (h);
6902 }
6903 \f
6904 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6905
6906 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6907 used for some functions that are allowed to break the ABI). */
6908 static const int shared_stub_entry[] =
6909 {
6910 0x7c0802a6, /* mflr 0 */
6911 0x429f0005, /* bcl 20, 31, .Lxxx */
6912 0x7d8802a6, /* mflr 12 */
6913 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6914 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6915 0x7c0803a6, /* mtlr 0 */
6916 0x7d8903a6, /* mtctr 12 */
6917 0x4e800420, /* bctr */
6918 };
6919
6920 static const int stub_entry[] =
6921 {
6922 0x3d800000, /* lis 12,xxx@ha */
6923 0x398c0000, /* addi 12,12,xxx@l */
6924 0x7d8903a6, /* mtctr 12 */
6925 0x4e800420, /* bctr */
6926 };
6927
6928 struct ppc_elf_relax_info
6929 {
6930 unsigned int workaround_size;
6931 unsigned int picfixup_size;
6932 };
6933
6934 /* This function implements long branch trampolines, and the ppc476
6935 icache bug workaround. Any section needing trampolines or patch
6936 space for the workaround has its size extended so that we can
6937 add trampolines at the end of the section. */
6938
6939 static bfd_boolean
6940 ppc_elf_relax_section (bfd *abfd,
6941 asection *isec,
6942 struct bfd_link_info *link_info,
6943 bfd_boolean *again)
6944 {
6945 struct one_branch_fixup
6946 {
6947 struct one_branch_fixup *next;
6948 asection *tsec;
6949 /* Final link, can use the symbol offset. For a
6950 relocatable link we use the symbol's index. */
6951 bfd_vma toff;
6952 bfd_vma trampoff;
6953 };
6954
6955 Elf_Internal_Shdr *symtab_hdr;
6956 bfd_byte *contents = NULL;
6957 Elf_Internal_Sym *isymbuf = NULL;
6958 Elf_Internal_Rela *internal_relocs = NULL;
6959 Elf_Internal_Rela *irel, *irelend = NULL;
6960 struct one_branch_fixup *branch_fixups = NULL;
6961 struct ppc_elf_relax_info *relax_info = NULL;
6962 unsigned changes = 0;
6963 bfd_boolean workaround_change;
6964 struct ppc_elf_link_hash_table *htab;
6965 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6966 asection *got2;
6967 bfd_boolean maybe_pasted;
6968
6969 *again = FALSE;
6970
6971 /* No need to do anything with non-alloc or non-code sections. */
6972 if ((isec->flags & SEC_ALLOC) == 0
6973 || (isec->flags & SEC_CODE) == 0
6974 || (isec->flags & SEC_LINKER_CREATED) != 0
6975 || isec->size < 4)
6976 return TRUE;
6977
6978 /* We cannot represent the required PIC relocs in the output, so don't
6979 do anything. The linker doesn't support mixing -shared and -r
6980 anyway. */
6981 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6982 return TRUE;
6983
6984 htab = ppc_elf_hash_table (link_info);
6985 if (htab == NULL)
6986 return TRUE;
6987
6988 isec->size = (isec->size + 3) & -4;
6989 if (isec->rawsize == 0)
6990 isec->rawsize = isec->size;
6991 trampbase = isec->size;
6992
6993 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6994 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6995 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6996
6997 if (htab->params->ppc476_workaround
6998 || htab->params->pic_fixup > 0)
6999 {
7000 if (elf_section_data (isec)->sec_info == NULL)
7001 {
7002 elf_section_data (isec)->sec_info
7003 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7004 if (elf_section_data (isec)->sec_info == NULL)
7005 return FALSE;
7006 }
7007 relax_info = elf_section_data (isec)->sec_info;
7008 trampbase -= relax_info->workaround_size;
7009 }
7010
7011 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7012 || strcmp (isec->output_section->name, ".fini") == 0);
7013 /* Space for a branch around any trampolines. */
7014 trampoff = trampbase;
7015 if (maybe_pasted && trampbase == isec->rawsize)
7016 trampoff += 4;
7017
7018 symtab_hdr = &elf_symtab_hdr (abfd);
7019 picfixup_size = 0;
7020 if (htab->params->branch_trampolines
7021 || htab->params->pic_fixup > 0)
7022 {
7023 /* Get a copy of the native relocations. */
7024 if (isec->reloc_count != 0)
7025 {
7026 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7027 link_info->keep_memory);
7028 if (internal_relocs == NULL)
7029 goto error_return;
7030 }
7031
7032 got2 = bfd_get_section_by_name (abfd, ".got2");
7033
7034 irelend = internal_relocs + isec->reloc_count;
7035 for (irel = internal_relocs; irel < irelend; irel++)
7036 {
7037 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7038 bfd_vma toff, roff;
7039 asection *tsec;
7040 struct one_branch_fixup *f;
7041 size_t insn_offset = 0;
7042 bfd_vma max_branch_offset = 0, val;
7043 bfd_byte *hit_addr;
7044 unsigned long t0;
7045 struct elf_link_hash_entry *h;
7046 struct plt_entry **plist;
7047 unsigned char sym_type;
7048
7049 switch (r_type)
7050 {
7051 case R_PPC_REL24:
7052 case R_PPC_LOCAL24PC:
7053 case R_PPC_PLTREL24:
7054 max_branch_offset = 1 << 25;
7055 break;
7056
7057 case R_PPC_REL14:
7058 case R_PPC_REL14_BRTAKEN:
7059 case R_PPC_REL14_BRNTAKEN:
7060 max_branch_offset = 1 << 15;
7061 break;
7062
7063 case R_PPC_ADDR16_HA:
7064 if (htab->params->pic_fixup > 0)
7065 break;
7066 continue;
7067
7068 default:
7069 continue;
7070 }
7071
7072 /* Get the value of the symbol referred to by the reloc. */
7073 h = NULL;
7074 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7075 {
7076 /* A local symbol. */
7077 Elf_Internal_Sym *isym;
7078
7079 /* Read this BFD's local symbols. */
7080 if (isymbuf == NULL)
7081 {
7082 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7083 if (isymbuf == NULL)
7084 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7085 symtab_hdr->sh_info, 0,
7086 NULL, NULL, NULL);
7087 if (isymbuf == 0)
7088 goto error_return;
7089 }
7090 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7091 if (isym->st_shndx == SHN_UNDEF)
7092 tsec = bfd_und_section_ptr;
7093 else if (isym->st_shndx == SHN_ABS)
7094 tsec = bfd_abs_section_ptr;
7095 else if (isym->st_shndx == SHN_COMMON)
7096 tsec = bfd_com_section_ptr;
7097 else
7098 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7099
7100 toff = isym->st_value;
7101 sym_type = ELF_ST_TYPE (isym->st_info);
7102 }
7103 else
7104 {
7105 /* Global symbol handling. */
7106 unsigned long indx;
7107
7108 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7109 h = elf_sym_hashes (abfd)[indx];
7110
7111 while (h->root.type == bfd_link_hash_indirect
7112 || h->root.type == bfd_link_hash_warning)
7113 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7114
7115 if (h->root.type == bfd_link_hash_defined
7116 || h->root.type == bfd_link_hash_defweak)
7117 {
7118 tsec = h->root.u.def.section;
7119 toff = h->root.u.def.value;
7120 }
7121 else if (h->root.type == bfd_link_hash_undefined
7122 || h->root.type == bfd_link_hash_undefweak)
7123 {
7124 tsec = bfd_und_section_ptr;
7125 toff = bfd_link_relocatable (link_info) ? indx : 0;
7126 }
7127 else
7128 continue;
7129
7130 /* If this branch is to __tls_get_addr then we may later
7131 optimise away the call. We won't be needing a long-
7132 branch stub in that case. */
7133 if (bfd_link_executable (link_info)
7134 && h == htab->tls_get_addr
7135 && irel != internal_relocs)
7136 {
7137 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7138 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7139 unsigned int tls_mask = 0;
7140
7141 /* The previous reloc should be one of R_PPC_TLSGD or
7142 R_PPC_TLSLD, or for older object files, a reloc
7143 on the __tls_get_addr arg setup insn. Get tls
7144 mask bits from the symbol on that reloc. */
7145 if (t_symndx < symtab_hdr->sh_info)
7146 {
7147 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7148
7149 if (local_got_offsets != NULL)
7150 {
7151 struct plt_entry **local_plt = (struct plt_entry **)
7152 (local_got_offsets + symtab_hdr->sh_info);
7153 char *lgot_masks = (char *)
7154 (local_plt + symtab_hdr->sh_info);
7155 tls_mask = lgot_masks[t_symndx];
7156 }
7157 }
7158 else
7159 {
7160 struct elf_link_hash_entry *th
7161 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7162
7163 while (th->root.type == bfd_link_hash_indirect
7164 || th->root.type == bfd_link_hash_warning)
7165 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7166
7167 tls_mask
7168 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7169 }
7170
7171 /* The mask bits tell us if the call will be
7172 optimised away. */
7173 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7174 && (t_rtype == R_PPC_TLSGD
7175 || t_rtype == R_PPC_GOT_TLSGD16
7176 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7177 continue;
7178 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7179 && (t_rtype == R_PPC_TLSLD
7180 || t_rtype == R_PPC_GOT_TLSLD16
7181 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7182 continue;
7183 }
7184
7185 sym_type = h->type;
7186 }
7187
7188 if (r_type == R_PPC_ADDR16_HA)
7189 {
7190 if (h != NULL
7191 && !h->def_regular
7192 && h->protected_def
7193 && ppc_elf_hash_entry (h)->has_addr16_ha
7194 && ppc_elf_hash_entry (h)->has_addr16_lo)
7195 picfixup_size += 12;
7196 continue;
7197 }
7198
7199 /* The condition here under which we call find_plt_ent must
7200 match that in relocate_section. If we call find_plt_ent here
7201 but not in relocate_section, or vice versa, then the branch
7202 destination used here may be incorrect. */
7203 plist = NULL;
7204 if (h != NULL)
7205 {
7206 /* We know is_branch_reloc (r_type) is true. */
7207 if (h->type == STT_GNU_IFUNC
7208 || r_type == R_PPC_PLTREL24)
7209 plist = &h->plt.plist;
7210 }
7211 else if (sym_type == STT_GNU_IFUNC
7212 && elf_local_got_offsets (abfd) != NULL)
7213 {
7214 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7215 struct plt_entry **local_plt = (struct plt_entry **)
7216 (local_got_offsets + symtab_hdr->sh_info);
7217 plist = local_plt + ELF32_R_SYM (irel->r_info);
7218 }
7219 if (plist != NULL)
7220 {
7221 bfd_vma addend = 0;
7222 struct plt_entry *ent;
7223
7224 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7225 addend = irel->r_addend;
7226 ent = find_plt_ent (plist, got2, addend);
7227 if (ent != NULL)
7228 {
7229 if (htab->plt_type == PLT_NEW
7230 || h == NULL
7231 || !htab->elf.dynamic_sections_created
7232 || h->dynindx == -1)
7233 {
7234 tsec = htab->glink;
7235 toff = ent->glink_offset;
7236 }
7237 else
7238 {
7239 tsec = htab->plt;
7240 toff = ent->plt.offset;
7241 }
7242 }
7243 }
7244
7245 /* If the branch and target are in the same section, you have
7246 no hope of adding stubs. We'll error out later should the
7247 branch overflow. */
7248 if (tsec == isec)
7249 continue;
7250
7251 /* There probably isn't any reason to handle symbols in
7252 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7253 attribute for a code section, and we are only looking at
7254 branches. However, implement it correctly here as a
7255 reference for other target relax_section functions. */
7256 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7257 {
7258 /* At this stage in linking, no SEC_MERGE symbol has been
7259 adjusted, so all references to such symbols need to be
7260 passed through _bfd_merged_section_offset. (Later, in
7261 relocate_section, all SEC_MERGE symbols *except* for
7262 section symbols have been adjusted.)
7263
7264 gas may reduce relocations against symbols in SEC_MERGE
7265 sections to a relocation against the section symbol when
7266 the original addend was zero. When the reloc is against
7267 a section symbol we should include the addend in the
7268 offset passed to _bfd_merged_section_offset, since the
7269 location of interest is the original symbol. On the
7270 other hand, an access to "sym+addend" where "sym" is not
7271 a section symbol should not include the addend; Such an
7272 access is presumed to be an offset from "sym"; The
7273 location of interest is just "sym". */
7274 if (sym_type == STT_SECTION)
7275 toff += irel->r_addend;
7276
7277 toff
7278 = _bfd_merged_section_offset (abfd, &tsec,
7279 elf_section_data (tsec)->sec_info,
7280 toff);
7281
7282 if (sym_type != STT_SECTION)
7283 toff += irel->r_addend;
7284 }
7285 /* PLTREL24 addends are special. */
7286 else if (r_type != R_PPC_PLTREL24)
7287 toff += irel->r_addend;
7288
7289 /* Attempted -shared link of non-pic code loses. */
7290 if ((!bfd_link_relocatable (link_info)
7291 && tsec == bfd_und_section_ptr)
7292 || tsec->output_section == NULL
7293 || (tsec->owner != NULL
7294 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7295 continue;
7296
7297 roff = irel->r_offset;
7298
7299 /* If the branch is in range, no need to do anything. */
7300 if (tsec != bfd_und_section_ptr
7301 && (!bfd_link_relocatable (link_info)
7302 /* A relocatable link may have sections moved during
7303 final link, so do not presume they remain in range. */
7304 || tsec->output_section == isec->output_section))
7305 {
7306 bfd_vma symaddr, reladdr;
7307
7308 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7309 reladdr = isec->output_section->vma + isec->output_offset + roff;
7310 if (symaddr - reladdr + max_branch_offset
7311 < 2 * max_branch_offset)
7312 continue;
7313 }
7314
7315 /* Look for an existing fixup to this address. */
7316 for (f = branch_fixups; f ; f = f->next)
7317 if (f->tsec == tsec && f->toff == toff)
7318 break;
7319
7320 if (f == NULL)
7321 {
7322 size_t size;
7323 unsigned long stub_rtype;
7324
7325 val = trampoff - roff;
7326 if (val >= max_branch_offset)
7327 /* Oh dear, we can't reach a trampoline. Don't try to add
7328 one. We'll report an error later. */
7329 continue;
7330
7331 if (bfd_link_pic (link_info))
7332 {
7333 size = 4 * ARRAY_SIZE (shared_stub_entry);
7334 insn_offset = 12;
7335 }
7336 else
7337 {
7338 size = 4 * ARRAY_SIZE (stub_entry);
7339 insn_offset = 0;
7340 }
7341 stub_rtype = R_PPC_RELAX;
7342 if (tsec == htab->plt
7343 || tsec == htab->glink)
7344 {
7345 stub_rtype = R_PPC_RELAX_PLT;
7346 if (r_type == R_PPC_PLTREL24)
7347 stub_rtype = R_PPC_RELAX_PLTREL24;
7348 }
7349
7350 /* Hijack the old relocation. Since we need two
7351 relocations for this use a "composite" reloc. */
7352 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7353 stub_rtype);
7354 irel->r_offset = trampoff + insn_offset;
7355 if (r_type == R_PPC_PLTREL24
7356 && stub_rtype != R_PPC_RELAX_PLTREL24)
7357 irel->r_addend = 0;
7358
7359 /* Record the fixup so we don't do it again this section. */
7360 f = bfd_malloc (sizeof (*f));
7361 f->next = branch_fixups;
7362 f->tsec = tsec;
7363 f->toff = toff;
7364 f->trampoff = trampoff;
7365 branch_fixups = f;
7366
7367 trampoff += size;
7368 changes++;
7369 }
7370 else
7371 {
7372 val = f->trampoff - roff;
7373 if (val >= max_branch_offset)
7374 continue;
7375
7376 /* Nop out the reloc, since we're finalizing things here. */
7377 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7378 }
7379
7380 /* Get the section contents. */
7381 if (contents == NULL)
7382 {
7383 /* Get cached copy if it exists. */
7384 if (elf_section_data (isec)->this_hdr.contents != NULL)
7385 contents = elf_section_data (isec)->this_hdr.contents;
7386 /* Go get them off disk. */
7387 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7388 goto error_return;
7389 }
7390
7391 /* Fix up the existing branch to hit the trampoline. */
7392 hit_addr = contents + roff;
7393 switch (r_type)
7394 {
7395 case R_PPC_REL24:
7396 case R_PPC_LOCAL24PC:
7397 case R_PPC_PLTREL24:
7398 t0 = bfd_get_32 (abfd, hit_addr);
7399 t0 &= ~0x3fffffc;
7400 t0 |= val & 0x3fffffc;
7401 bfd_put_32 (abfd, t0, hit_addr);
7402 break;
7403
7404 case R_PPC_REL14:
7405 case R_PPC_REL14_BRTAKEN:
7406 case R_PPC_REL14_BRNTAKEN:
7407 t0 = bfd_get_32 (abfd, hit_addr);
7408 t0 &= ~0xfffc;
7409 t0 |= val & 0xfffc;
7410 bfd_put_32 (abfd, t0, hit_addr);
7411 break;
7412 }
7413 }
7414
7415 while (branch_fixups != NULL)
7416 {
7417 struct one_branch_fixup *f = branch_fixups;
7418 branch_fixups = branch_fixups->next;
7419 free (f);
7420 }
7421 }
7422
7423 workaround_change = FALSE;
7424 newsize = trampoff;
7425 if (htab->params->ppc476_workaround
7426 && (!bfd_link_relocatable (link_info)
7427 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7428 {
7429 bfd_vma addr, end_addr;
7430 unsigned int crossings;
7431 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7432
7433 addr = isec->output_section->vma + isec->output_offset;
7434 end_addr = addr + trampoff;
7435 addr &= -pagesize;
7436 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7437 if (crossings != 0)
7438 {
7439 /* Keep space aligned, to ensure the patch code itself does
7440 not cross a page. Don't decrease size calculated on a
7441 previous pass as otherwise we might never settle on a layout. */
7442 newsize = 15 - ((end_addr - 1) & 15);
7443 newsize += crossings * 16;
7444 if (relax_info->workaround_size < newsize)
7445 {
7446 relax_info->workaround_size = newsize;
7447 workaround_change = TRUE;
7448 }
7449 /* Ensure relocate_section is called. */
7450 isec->flags |= SEC_RELOC;
7451 }
7452 newsize = trampoff + relax_info->workaround_size;
7453 }
7454
7455 if (htab->params->pic_fixup > 0)
7456 {
7457 picfixup_size -= relax_info->picfixup_size;
7458 if (picfixup_size != 0)
7459 relax_info->picfixup_size += picfixup_size;
7460 newsize += relax_info->picfixup_size;
7461 }
7462
7463 if (changes != 0 || picfixup_size != 0 || workaround_change)
7464 isec->size = newsize;
7465
7466 if (isymbuf != NULL
7467 && symtab_hdr->contents != (unsigned char *) isymbuf)
7468 {
7469 if (! link_info->keep_memory)
7470 free (isymbuf);
7471 else
7472 {
7473 /* Cache the symbols for elf_link_input_bfd. */
7474 symtab_hdr->contents = (unsigned char *) isymbuf;
7475 }
7476 }
7477
7478 if (contents != NULL
7479 && elf_section_data (isec)->this_hdr.contents != contents)
7480 {
7481 if (!changes && !link_info->keep_memory)
7482 free (contents);
7483 else
7484 {
7485 /* Cache the section contents for elf_link_input_bfd. */
7486 elf_section_data (isec)->this_hdr.contents = contents;
7487 }
7488 }
7489
7490 changes += picfixup_size;
7491 if (changes != 0)
7492 {
7493 /* Append sufficient NOP relocs so we can write out relocation
7494 information for the trampolines. */
7495 Elf_Internal_Shdr *rel_hdr;
7496 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7497 * sizeof (*new_relocs));
7498 unsigned ix;
7499
7500 if (!new_relocs)
7501 goto error_return;
7502 memcpy (new_relocs, internal_relocs,
7503 isec->reloc_count * sizeof (*new_relocs));
7504 for (ix = changes; ix--;)
7505 {
7506 irel = new_relocs + ix + isec->reloc_count;
7507
7508 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7509 }
7510 if (internal_relocs != elf_section_data (isec)->relocs)
7511 free (internal_relocs);
7512 elf_section_data (isec)->relocs = new_relocs;
7513 isec->reloc_count += changes;
7514 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7515 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7516 }
7517 else if (internal_relocs != NULL
7518 && elf_section_data (isec)->relocs != internal_relocs)
7519 free (internal_relocs);
7520
7521 *again = changes != 0 || workaround_change;
7522 return TRUE;
7523
7524 error_return:
7525 while (branch_fixups != NULL)
7526 {
7527 struct one_branch_fixup *f = branch_fixups;
7528 branch_fixups = branch_fixups->next;
7529 free (f);
7530 }
7531 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7532 free (isymbuf);
7533 if (contents != NULL
7534 && elf_section_data (isec)->this_hdr.contents != contents)
7535 free (contents);
7536 if (internal_relocs != NULL
7537 && elf_section_data (isec)->relocs != internal_relocs)
7538 free (internal_relocs);
7539 return FALSE;
7540 }
7541 \f
7542 /* What to do when ld finds relocations against symbols defined in
7543 discarded sections. */
7544
7545 static unsigned int
7546 ppc_elf_action_discarded (asection *sec)
7547 {
7548 if (strcmp (".fixup", sec->name) == 0)
7549 return 0;
7550
7551 if (strcmp (".got2", sec->name) == 0)
7552 return 0;
7553
7554 return _bfd_elf_default_action_discarded (sec);
7555 }
7556 \f
7557 /* Fill in the address for a pointer generated in a linker section. */
7558
7559 static bfd_vma
7560 elf_finish_pointer_linker_section (bfd *input_bfd,
7561 elf_linker_section_t *lsect,
7562 struct elf_link_hash_entry *h,
7563 bfd_vma relocation,
7564 const Elf_Internal_Rela *rel)
7565 {
7566 elf_linker_section_pointers_t *linker_section_ptr;
7567
7568 BFD_ASSERT (lsect != NULL);
7569
7570 if (h != NULL)
7571 {
7572 /* Handle global symbol. */
7573 struct ppc_elf_link_hash_entry *eh;
7574
7575 eh = (struct ppc_elf_link_hash_entry *) h;
7576 BFD_ASSERT (eh->elf.def_regular);
7577 linker_section_ptr = eh->linker_section_pointer;
7578 }
7579 else
7580 {
7581 /* Handle local symbol. */
7582 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7583
7584 BFD_ASSERT (is_ppc_elf (input_bfd));
7585 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7586 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7587 }
7588
7589 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7590 rel->r_addend,
7591 lsect);
7592 BFD_ASSERT (linker_section_ptr != NULL);
7593
7594 /* Offset will always be a multiple of four, so use the bottom bit
7595 as a "written" flag. */
7596 if ((linker_section_ptr->offset & 1) == 0)
7597 {
7598 bfd_put_32 (lsect->section->owner,
7599 relocation + linker_section_ptr->addend,
7600 lsect->section->contents + linker_section_ptr->offset);
7601 linker_section_ptr->offset += 1;
7602 }
7603
7604 relocation = (lsect->section->output_section->vma
7605 + lsect->section->output_offset
7606 + linker_section_ptr->offset - 1
7607 - SYM_VAL (lsect->sym));
7608
7609 #ifdef DEBUG
7610 fprintf (stderr,
7611 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7612 lsect->name, (long) relocation, (long) relocation);
7613 #endif
7614
7615 return relocation;
7616 }
7617
7618 #define PPC_LO(v) ((v) & 0xffff)
7619 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7620 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7621
7622 static void
7623 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7624 struct bfd_link_info *info)
7625 {
7626 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7627 bfd *output_bfd = info->output_bfd;
7628 bfd_vma plt;
7629
7630 plt = ((ent->plt.offset & ~1)
7631 + plt_sec->output_section->vma
7632 + plt_sec->output_offset);
7633
7634 if (bfd_link_pic (info))
7635 {
7636 bfd_vma got = 0;
7637
7638 if (ent->addend >= 32768)
7639 got = (ent->addend
7640 + ent->sec->output_section->vma
7641 + ent->sec->output_offset);
7642 else if (htab->elf.hgot != NULL)
7643 got = SYM_VAL (htab->elf.hgot);
7644
7645 plt -= got;
7646
7647 if (plt + 0x8000 < 0x10000)
7648 {
7649 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7650 p += 4;
7651 bfd_put_32 (output_bfd, MTCTR_11, p);
7652 p += 4;
7653 bfd_put_32 (output_bfd, BCTR, p);
7654 p += 4;
7655 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7656 p += 4;
7657 }
7658 else
7659 {
7660 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7661 p += 4;
7662 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7663 p += 4;
7664 bfd_put_32 (output_bfd, MTCTR_11, p);
7665 p += 4;
7666 bfd_put_32 (output_bfd, BCTR, p);
7667 p += 4;
7668 }
7669 }
7670 else
7671 {
7672 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7673 p += 4;
7674 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7675 p += 4;
7676 bfd_put_32 (output_bfd, MTCTR_11, p);
7677 p += 4;
7678 bfd_put_32 (output_bfd, BCTR, p);
7679 p += 4;
7680 }
7681 }
7682
7683 /* Return true if symbol is defined statically. */
7684
7685 static bfd_boolean
7686 is_static_defined (struct elf_link_hash_entry *h)
7687 {
7688 return ((h->root.type == bfd_link_hash_defined
7689 || h->root.type == bfd_link_hash_defweak)
7690 && h->root.u.def.section != NULL
7691 && h->root.u.def.section->output_section != NULL);
7692 }
7693
7694 /* If INSN is an opcode that may be used with an @tls operand, return
7695 the transformed insn for TLS optimisation, otherwise return 0. If
7696 REG is non-zero only match an insn with RB or RA equal to REG. */
7697
7698 unsigned int
7699 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7700 {
7701 unsigned int rtra;
7702
7703 if ((insn & (0x3f << 26)) != 31 << 26)
7704 return 0;
7705
7706 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7707 rtra = insn & ((1 << 26) - (1 << 16));
7708 else if (((insn >> 16) & 0x1f) == reg)
7709 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7710 else
7711 return 0;
7712
7713 if ((insn & (0x3ff << 1)) == 266 << 1)
7714 /* add -> addi. */
7715 insn = 14 << 26;
7716 else if ((insn & (0x1f << 1)) == 23 << 1
7717 && ((insn & (0x1f << 6)) < 14 << 6
7718 || ((insn & (0x1f << 6)) >= 16 << 6
7719 && (insn & (0x1f << 6)) < 24 << 6)))
7720 /* load and store indexed -> dform. */
7721 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7722 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7723 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7724 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7725 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7726 /* lwax -> lwa. */
7727 insn = (58 << 26) | 2;
7728 else
7729 return 0;
7730 insn |= rtra;
7731 return insn;
7732 }
7733
7734 /* If INSN is an opcode that may be used with an @tprel operand, return
7735 the transformed insn for an undefined weak symbol, ie. with the
7736 thread pointer REG operand removed. Otherwise return 0. */
7737
7738 unsigned int
7739 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7740 {
7741 if ((insn & (0x1f << 16)) == reg << 16
7742 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7743 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7744 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7745 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7746 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7747 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7748 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7749 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7750 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7751 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7752 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7753 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7754 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7755 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7756 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7757 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7758 && (insn & 3) != 1)
7759 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7760 && ((insn & 3) == 0 || (insn & 3) == 3))))
7761 {
7762 insn &= ~(0x1f << 16);
7763 }
7764 else if ((insn & (0x1f << 21)) == reg << 21
7765 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7766 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7767 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7768 {
7769 insn &= ~(0x1f << 21);
7770 insn |= (insn & (0x1f << 16)) << 5;
7771 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7772 insn -= 2 >> 26; /* convert to ori,oris */
7773 }
7774 else
7775 insn = 0;
7776 return insn;
7777 }
7778
7779 static bfd_boolean
7780 is_insn_ds_form (unsigned int insn)
7781 {
7782 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7783 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7784 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7785 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7786 }
7787
7788 static bfd_boolean
7789 is_insn_dq_form (unsigned int insn)
7790 {
7791 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7792 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7793 && (insn & 3) == 1));
7794 }
7795
7796 /* The RELOCATE_SECTION function is called by the ELF backend linker
7797 to handle the relocations for a section.
7798
7799 The relocs are always passed as Rela structures; if the section
7800 actually uses Rel structures, the r_addend field will always be
7801 zero.
7802
7803 This function is responsible for adjust the section contents as
7804 necessary, and (if using Rela relocs and generating a
7805 relocatable output file) adjusting the reloc addend as
7806 necessary.
7807
7808 This function does not have to worry about setting the reloc
7809 address or the reloc symbol index.
7810
7811 LOCAL_SYMS is a pointer to the swapped in local symbols.
7812
7813 LOCAL_SECTIONS is an array giving the section in the input file
7814 corresponding to the st_shndx field of each local symbol.
7815
7816 The global hash table entry for the global symbols can be found
7817 via elf_sym_hashes (input_bfd).
7818
7819 When generating relocatable output, this function must handle
7820 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7821 going to be the section symbol corresponding to the output
7822 section, which means that the addend must be adjusted
7823 accordingly. */
7824
7825 static bfd_boolean
7826 ppc_elf_relocate_section (bfd *output_bfd,
7827 struct bfd_link_info *info,
7828 bfd *input_bfd,
7829 asection *input_section,
7830 bfd_byte *contents,
7831 Elf_Internal_Rela *relocs,
7832 Elf_Internal_Sym *local_syms,
7833 asection **local_sections)
7834 {
7835 Elf_Internal_Shdr *symtab_hdr;
7836 struct elf_link_hash_entry **sym_hashes;
7837 struct ppc_elf_link_hash_table *htab;
7838 Elf_Internal_Rela *rel;
7839 Elf_Internal_Rela *wrel;
7840 Elf_Internal_Rela *relend;
7841 Elf_Internal_Rela outrel;
7842 asection *got2;
7843 bfd_vma *local_got_offsets;
7844 bfd_boolean ret = TRUE;
7845 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7846 bfd_boolean is_vxworks_tls;
7847 unsigned int picfixup_size = 0;
7848 struct ppc_elf_relax_info *relax_info = NULL;
7849
7850 #ifdef DEBUG
7851 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7852 "%ld relocations%s",
7853 input_bfd, input_section,
7854 (long) input_section->reloc_count,
7855 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7856 #endif
7857
7858 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7859
7860 /* Initialize howto table if not already done. */
7861 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7862 ppc_elf_howto_init ();
7863
7864 htab = ppc_elf_hash_table (info);
7865 local_got_offsets = elf_local_got_offsets (input_bfd);
7866 symtab_hdr = &elf_symtab_hdr (input_bfd);
7867 sym_hashes = elf_sym_hashes (input_bfd);
7868 /* We have to handle relocations in vxworks .tls_vars sections
7869 specially, because the dynamic loader is 'weird'. */
7870 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7871 && !strcmp (input_section->output_section->name,
7872 ".tls_vars"));
7873 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7874 relax_info = elf_section_data (input_section)->sec_info;
7875 rel = wrel = relocs;
7876 relend = relocs + input_section->reloc_count;
7877 for (; rel < relend; wrel++, rel++)
7878 {
7879 enum elf_ppc_reloc_type r_type;
7880 bfd_vma addend;
7881 bfd_reloc_status_type r;
7882 Elf_Internal_Sym *sym;
7883 asection *sec;
7884 struct elf_link_hash_entry *h;
7885 const char *sym_name;
7886 reloc_howto_type *howto;
7887 unsigned long r_symndx;
7888 bfd_vma relocation;
7889 bfd_vma branch_bit, from;
7890 bfd_boolean unresolved_reloc;
7891 bfd_boolean warned;
7892 unsigned int tls_type, tls_mask, tls_gd;
7893 struct plt_entry **ifunc;
7894 struct reloc_howto_struct alt_howto;
7895
7896 again:
7897 r_type = ELF32_R_TYPE (rel->r_info);
7898 sym = NULL;
7899 sec = NULL;
7900 h = NULL;
7901 unresolved_reloc = FALSE;
7902 warned = FALSE;
7903 r_symndx = ELF32_R_SYM (rel->r_info);
7904
7905 if (r_symndx < symtab_hdr->sh_info)
7906 {
7907 sym = local_syms + r_symndx;
7908 sec = local_sections[r_symndx];
7909 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7910
7911 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7912 }
7913 else
7914 {
7915 bfd_boolean ignored;
7916
7917 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7918 r_symndx, symtab_hdr, sym_hashes,
7919 h, sec, relocation,
7920 unresolved_reloc, warned, ignored);
7921
7922 sym_name = h->root.root.string;
7923 }
7924
7925 if (sec != NULL && discarded_section (sec))
7926 {
7927 /* For relocs against symbols from removed linkonce sections,
7928 or sections discarded by a linker script, we just want the
7929 section contents zeroed. Avoid any special processing. */
7930 howto = NULL;
7931 if (r_type < R_PPC_max)
7932 howto = ppc_elf_howto_table[r_type];
7933
7934 _bfd_clear_contents (howto, input_bfd, input_section,
7935 contents + rel->r_offset);
7936 wrel->r_offset = rel->r_offset;
7937 wrel->r_info = 0;
7938 wrel->r_addend = 0;
7939
7940 /* For ld -r, remove relocations in debug sections against
7941 sections defined in discarded sections. Not done for
7942 non-debug to preserve relocs in .eh_frame which the
7943 eh_frame editing code expects to be present. */
7944 if (bfd_link_relocatable (info)
7945 && (input_section->flags & SEC_DEBUGGING))
7946 wrel--;
7947
7948 continue;
7949 }
7950
7951 if (bfd_link_relocatable (info))
7952 {
7953 if (got2 != NULL
7954 && r_type == R_PPC_PLTREL24
7955 && rel->r_addend != 0)
7956 {
7957 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7958 addend specifies the GOT pointer offset within .got2. */
7959 rel->r_addend += got2->output_offset;
7960 }
7961 if (r_type != R_PPC_RELAX_PLT
7962 && r_type != R_PPC_RELAX_PLTREL24
7963 && r_type != R_PPC_RELAX)
7964 goto copy_reloc;
7965 }
7966
7967 /* TLS optimizations. Replace instruction sequences and relocs
7968 based on information we collected in tls_optimize. We edit
7969 RELOCS so that --emit-relocs will output something sensible
7970 for the final instruction stream. */
7971 tls_mask = 0;
7972 tls_gd = 0;
7973 if (h != NULL)
7974 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7975 else if (local_got_offsets != NULL)
7976 {
7977 struct plt_entry **local_plt;
7978 char *lgot_masks;
7979 local_plt
7980 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7981 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7982 tls_mask = lgot_masks[r_symndx];
7983 }
7984
7985 /* Ensure reloc mapping code below stays sane. */
7986 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7987 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7988 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7989 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7990 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7991 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7992 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7993 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7994 abort ();
7995 switch (r_type)
7996 {
7997 default:
7998 break;
7999
8000 case R_PPC_GOT_TPREL16:
8001 case R_PPC_GOT_TPREL16_LO:
8002 if ((tls_mask & TLS_TLS) != 0
8003 && (tls_mask & TLS_TPREL) == 0)
8004 {
8005 bfd_vma insn;
8006
8007 insn = bfd_get_32 (input_bfd,
8008 contents + rel->r_offset - d_offset);
8009 insn &= 31 << 21;
8010 insn |= 0x3c020000; /* addis 0,2,0 */
8011 bfd_put_32 (input_bfd, insn,
8012 contents + rel->r_offset - d_offset);
8013 r_type = R_PPC_TPREL16_HA;
8014 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8015 }
8016 break;
8017
8018 case R_PPC_TLS:
8019 if ((tls_mask & TLS_TLS) != 0
8020 && (tls_mask & TLS_TPREL) == 0)
8021 {
8022 bfd_vma insn;
8023
8024 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8025 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8026 if (insn == 0)
8027 abort ();
8028 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8029 r_type = R_PPC_TPREL16_LO;
8030 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8031
8032 /* Was PPC_TLS which sits on insn boundary, now
8033 PPC_TPREL16_LO which is at low-order half-word. */
8034 rel->r_offset += d_offset;
8035 }
8036 break;
8037
8038 case R_PPC_GOT_TLSGD16_HI:
8039 case R_PPC_GOT_TLSGD16_HA:
8040 tls_gd = TLS_TPRELGD;
8041 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8042 goto tls_gdld_hi;
8043 break;
8044
8045 case R_PPC_GOT_TLSLD16_HI:
8046 case R_PPC_GOT_TLSLD16_HA:
8047 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8048 {
8049 tls_gdld_hi:
8050 if ((tls_mask & tls_gd) != 0)
8051 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8052 + R_PPC_GOT_TPREL16);
8053 else
8054 {
8055 rel->r_offset -= d_offset;
8056 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8057 r_type = R_PPC_NONE;
8058 }
8059 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8060 }
8061 break;
8062
8063 case R_PPC_GOT_TLSGD16:
8064 case R_PPC_GOT_TLSGD16_LO:
8065 tls_gd = TLS_TPRELGD;
8066 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8067 goto tls_ldgd_opt;
8068 break;
8069
8070 case R_PPC_GOT_TLSLD16:
8071 case R_PPC_GOT_TLSLD16_LO:
8072 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8073 {
8074 unsigned int insn1, insn2;
8075 bfd_vma offset;
8076
8077 tls_ldgd_opt:
8078 offset = (bfd_vma) -1;
8079 /* If not using the newer R_PPC_TLSGD/LD to mark
8080 __tls_get_addr calls, we must trust that the call
8081 stays with its arg setup insns, ie. that the next
8082 reloc is the __tls_get_addr call associated with
8083 the current reloc. Edit both insns. */
8084 if (input_section->has_tls_get_addr_call
8085 && rel + 1 < relend
8086 && branch_reloc_hash_match (input_bfd, rel + 1,
8087 htab->tls_get_addr))
8088 offset = rel[1].r_offset;
8089 /* We read the low GOT_TLS insn because we need to keep
8090 the destination reg. It may be something other than
8091 the usual r3, and moved to r3 before the call by
8092 intervening code. */
8093 insn1 = bfd_get_32 (input_bfd,
8094 contents + rel->r_offset - d_offset);
8095 if ((tls_mask & tls_gd) != 0)
8096 {
8097 /* IE */
8098 insn1 &= (0x1f << 21) | (0x1f << 16);
8099 insn1 |= 32 << 26; /* lwz */
8100 if (offset != (bfd_vma) -1)
8101 {
8102 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8103 insn2 = 0x7c631214; /* add 3,3,2 */
8104 bfd_put_32 (input_bfd, insn2, contents + offset);
8105 }
8106 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8107 + R_PPC_GOT_TPREL16);
8108 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8109 }
8110 else
8111 {
8112 /* LE */
8113 insn1 &= 0x1f << 21;
8114 insn1 |= 0x3c020000; /* addis r,2,0 */
8115 if (tls_gd == 0)
8116 {
8117 /* Was an LD reloc. */
8118 for (r_symndx = 0;
8119 r_symndx < symtab_hdr->sh_info;
8120 r_symndx++)
8121 if (local_sections[r_symndx] == sec)
8122 break;
8123 if (r_symndx >= symtab_hdr->sh_info)
8124 r_symndx = STN_UNDEF;
8125 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8126 if (r_symndx != STN_UNDEF)
8127 rel->r_addend -= (local_syms[r_symndx].st_value
8128 + sec->output_offset
8129 + sec->output_section->vma);
8130 }
8131 r_type = R_PPC_TPREL16_HA;
8132 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8133 if (offset != (bfd_vma) -1)
8134 {
8135 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8136 rel[1].r_offset = offset + d_offset;
8137 rel[1].r_addend = rel->r_addend;
8138 insn2 = 0x38630000; /* addi 3,3,0 */
8139 bfd_put_32 (input_bfd, insn2, contents + offset);
8140 }
8141 }
8142 bfd_put_32 (input_bfd, insn1,
8143 contents + rel->r_offset - d_offset);
8144 if (tls_gd == 0)
8145 {
8146 /* We changed the symbol on an LD reloc. Start over
8147 in order to get h, sym, sec etc. right. */
8148 goto again;
8149 }
8150 }
8151 break;
8152
8153 case R_PPC_TLSGD:
8154 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8155 {
8156 unsigned int insn2;
8157 bfd_vma offset = rel->r_offset;
8158
8159 if ((tls_mask & TLS_TPRELGD) != 0)
8160 {
8161 /* IE */
8162 r_type = R_PPC_NONE;
8163 insn2 = 0x7c631214; /* add 3,3,2 */
8164 }
8165 else
8166 {
8167 /* LE */
8168 r_type = R_PPC_TPREL16_LO;
8169 rel->r_offset += d_offset;
8170 insn2 = 0x38630000; /* addi 3,3,0 */
8171 }
8172 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8173 bfd_put_32 (input_bfd, insn2, contents + offset);
8174 /* Zap the reloc on the _tls_get_addr call too. */
8175 BFD_ASSERT (offset == rel[1].r_offset);
8176 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8177 }
8178 break;
8179
8180 case R_PPC_TLSLD:
8181 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8182 {
8183 unsigned int insn2;
8184
8185 for (r_symndx = 0;
8186 r_symndx < symtab_hdr->sh_info;
8187 r_symndx++)
8188 if (local_sections[r_symndx] == sec)
8189 break;
8190 if (r_symndx >= symtab_hdr->sh_info)
8191 r_symndx = STN_UNDEF;
8192 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8193 if (r_symndx != STN_UNDEF)
8194 rel->r_addend -= (local_syms[r_symndx].st_value
8195 + sec->output_offset
8196 + sec->output_section->vma);
8197
8198 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8199 rel->r_offset += d_offset;
8200 insn2 = 0x38630000; /* addi 3,3,0 */
8201 bfd_put_32 (input_bfd, insn2,
8202 contents + rel->r_offset - d_offset);
8203 /* Zap the reloc on the _tls_get_addr call too. */
8204 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8205 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8206 goto again;
8207 }
8208 break;
8209 }
8210
8211 /* Handle other relocations that tweak non-addend part of insn. */
8212 branch_bit = 0;
8213 switch (r_type)
8214 {
8215 default:
8216 break;
8217
8218 /* Branch taken prediction relocations. */
8219 case R_PPC_ADDR14_BRTAKEN:
8220 case R_PPC_REL14_BRTAKEN:
8221 branch_bit = BRANCH_PREDICT_BIT;
8222 /* Fall through. */
8223
8224 /* Branch not taken prediction relocations. */
8225 case R_PPC_ADDR14_BRNTAKEN:
8226 case R_PPC_REL14_BRNTAKEN:
8227 {
8228 bfd_vma insn;
8229
8230 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8231 insn &= ~BRANCH_PREDICT_BIT;
8232 insn |= branch_bit;
8233
8234 from = (rel->r_offset
8235 + input_section->output_offset
8236 + input_section->output_section->vma);
8237
8238 /* Invert 'y' bit if not the default. */
8239 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8240 insn ^= BRANCH_PREDICT_BIT;
8241
8242 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8243 break;
8244 }
8245 }
8246
8247 if (ELIMINATE_COPY_RELOCS
8248 && h != NULL
8249 && !h->def_regular
8250 && h->protected_def
8251 && ppc_elf_hash_entry (h)->has_addr16_ha
8252 && ppc_elf_hash_entry (h)->has_addr16_lo
8253 && htab->params->pic_fixup > 0)
8254 {
8255 /* Convert lis;addi or lis;load/store accessing a protected
8256 variable defined in a shared library to PIC. */
8257 unsigned int insn;
8258
8259 if (r_type == R_PPC_ADDR16_HA)
8260 {
8261 insn = bfd_get_32 (input_bfd,
8262 contents + rel->r_offset - d_offset);
8263 if ((insn & (0x3f << 26)) == (15u << 26)
8264 && (insn & (0x1f << 16)) == 0 /* lis */)
8265 {
8266 bfd_byte *p;
8267 bfd_vma off;
8268 bfd_vma got_addr;
8269
8270 p = (contents + input_section->size
8271 - relax_info->workaround_size
8272 - relax_info->picfixup_size
8273 + picfixup_size);
8274 off = (p - contents) - (rel->r_offset - d_offset);
8275 if (off > 0x1fffffc || (off & 3) != 0)
8276 info->callbacks->einfo
8277 (_("%P: %H: fixup branch overflow\n"),
8278 input_bfd, input_section, rel->r_offset);
8279
8280 bfd_put_32 (input_bfd, B | off,
8281 contents + rel->r_offset - d_offset);
8282 got_addr = (htab->got->output_section->vma
8283 + htab->got->output_offset
8284 + (h->got.offset & ~1));
8285 wrel->r_offset = (p - contents) + d_offset;
8286 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8287 wrel->r_addend = got_addr;
8288 insn &= ~0xffff;
8289 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8290 bfd_put_32 (input_bfd, insn, p);
8291
8292 /* Convert lis to lwz, loading address from GOT. */
8293 insn &= ~0xffff;
8294 insn ^= (32u ^ 15u) << 26;
8295 insn |= (insn & (0x1f << 21)) >> 5;
8296 insn |= got_addr & 0xffff;
8297 bfd_put_32 (input_bfd, insn, p + 4);
8298
8299 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8300 picfixup_size += 12;
8301
8302 /* Use one of the spare relocs, so --emit-relocs
8303 output is reasonable. */
8304 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8305 wrel++, rel++;
8306 rel->r_offset = wrel[-1].r_offset + 4;
8307 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8308 rel->r_addend = wrel[-1].r_addend;
8309
8310 /* Continue on as if we had a got reloc, to output
8311 dynamic reloc. */
8312 r_type = R_PPC_GOT16_LO;
8313 }
8314 else
8315 info->callbacks->einfo
8316 /* xgettext:c-format */
8317 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8318 input_bfd, input_section, rel->r_offset,
8319 "R_PPC_ADDR16_HA", insn);
8320 }
8321 else if (r_type == R_PPC_ADDR16_LO)
8322 {
8323 insn = bfd_get_32 (input_bfd,
8324 contents + rel->r_offset - d_offset);
8325 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8326 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8327 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8328 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8329 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8330 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8331 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8332 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8333 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8334 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8335 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8336 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8337 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8338 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8339 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8340 && (insn & 3) != 1)
8341 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8342 && ((insn & 3) == 0 || (insn & 3) == 3)))
8343 {
8344 /* Arrange to apply the reloc addend, if any. */
8345 relocation = 0;
8346 unresolved_reloc = FALSE;
8347 rel->r_info = ELF32_R_INFO (0, r_type);
8348 }
8349 else
8350 info->callbacks->einfo
8351 /* xgettext:c-format */
8352 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8353 input_bfd, input_section, rel->r_offset,
8354 "R_PPC_ADDR16_LO", insn);
8355 }
8356 }
8357
8358 ifunc = NULL;
8359 if (!htab->is_vxworks)
8360 {
8361 struct plt_entry *ent;
8362
8363 if (h != NULL)
8364 {
8365 if (h->type == STT_GNU_IFUNC)
8366 ifunc = &h->plt.plist;
8367 }
8368 else if (local_got_offsets != NULL
8369 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8370 {
8371 struct plt_entry **local_plt;
8372
8373 local_plt = (struct plt_entry **) (local_got_offsets
8374 + symtab_hdr->sh_info);
8375 ifunc = local_plt + r_symndx;
8376 }
8377
8378 ent = NULL;
8379 if (ifunc != NULL
8380 && (!bfd_link_pic (info)
8381 || is_branch_reloc (r_type)))
8382 {
8383 addend = 0;
8384 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8385 addend = rel->r_addend;
8386 ent = find_plt_ent (ifunc, got2, addend);
8387 }
8388 if (ent != NULL)
8389 {
8390 if (bfd_link_pic (info)
8391 && ent->sec != got2
8392 && htab->plt_type != PLT_NEW
8393 && (!htab->elf.dynamic_sections_created
8394 || h == NULL
8395 || h->dynindx == -1))
8396 {
8397 /* Uh oh, we are going to create a pic glink stub
8398 for an ifunc (here for h == NULL and later in
8399 finish_dynamic_symbol for h != NULL), and
8400 apparently are using code compiled with
8401 -mbss-plt. The difficulty is that -mbss-plt code
8402 gives no indication via a magic PLTREL24 addend
8403 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8404 is pointing into a .got2 section (and how far
8405 into .got2). */
8406 info->callbacks->einfo
8407 /* xgettext:c-format */
8408 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8409 input_bfd, input_section, rel->r_offset, sym_name);
8410 }
8411 if (h == NULL && (ent->plt.offset & 1) == 0)
8412 {
8413 Elf_Internal_Rela rela;
8414 bfd_byte *loc;
8415
8416 rela.r_offset = (htab->iplt->output_section->vma
8417 + htab->iplt->output_offset
8418 + ent->plt.offset);
8419 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8420 rela.r_addend = relocation;
8421 loc = htab->reliplt->contents;
8422 loc += (htab->reliplt->reloc_count++
8423 * sizeof (Elf32_External_Rela));
8424 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8425
8426 ent->plt.offset |= 1;
8427 }
8428 if (h == NULL && (ent->glink_offset & 1) == 0)
8429 {
8430 unsigned char *p = ((unsigned char *) htab->glink->contents
8431 + ent->glink_offset);
8432 write_glink_stub (ent, htab->iplt, p, info);
8433 ent->glink_offset |= 1;
8434 }
8435
8436 unresolved_reloc = FALSE;
8437 if (htab->plt_type == PLT_NEW
8438 || !htab->elf.dynamic_sections_created
8439 || h == NULL
8440 || h->dynindx == -1)
8441 relocation = (htab->glink->output_section->vma
8442 + htab->glink->output_offset
8443 + (ent->glink_offset & ~1));
8444 else
8445 relocation = (htab->plt->output_section->vma
8446 + htab->plt->output_offset
8447 + ent->plt.offset);
8448 }
8449 }
8450
8451 addend = rel->r_addend;
8452 tls_type = 0;
8453 howto = NULL;
8454 if (r_type < R_PPC_max)
8455 howto = ppc_elf_howto_table[r_type];
8456 switch (r_type)
8457 {
8458 default:
8459 info->callbacks->einfo
8460 /* xgettext:c-format */
8461 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8462 input_bfd, (int) r_type, sym_name);
8463
8464 bfd_set_error (bfd_error_bad_value);
8465 ret = FALSE;
8466 goto copy_reloc;
8467
8468 case R_PPC_NONE:
8469 case R_PPC_TLS:
8470 case R_PPC_TLSGD:
8471 case R_PPC_TLSLD:
8472 case R_PPC_EMB_MRKREF:
8473 case R_PPC_GNU_VTINHERIT:
8474 case R_PPC_GNU_VTENTRY:
8475 goto copy_reloc;
8476
8477 /* GOT16 relocations. Like an ADDR16 using the symbol's
8478 address in the GOT as relocation value instead of the
8479 symbol's value itself. Also, create a GOT entry for the
8480 symbol and put the symbol value there. */
8481 case R_PPC_GOT_TLSGD16:
8482 case R_PPC_GOT_TLSGD16_LO:
8483 case R_PPC_GOT_TLSGD16_HI:
8484 case R_PPC_GOT_TLSGD16_HA:
8485 tls_type = TLS_TLS | TLS_GD;
8486 goto dogot;
8487
8488 case R_PPC_GOT_TLSLD16:
8489 case R_PPC_GOT_TLSLD16_LO:
8490 case R_PPC_GOT_TLSLD16_HI:
8491 case R_PPC_GOT_TLSLD16_HA:
8492 tls_type = TLS_TLS | TLS_LD;
8493 goto dogot;
8494
8495 case R_PPC_GOT_TPREL16:
8496 case R_PPC_GOT_TPREL16_LO:
8497 case R_PPC_GOT_TPREL16_HI:
8498 case R_PPC_GOT_TPREL16_HA:
8499 tls_type = TLS_TLS | TLS_TPREL;
8500 goto dogot;
8501
8502 case R_PPC_GOT_DTPREL16:
8503 case R_PPC_GOT_DTPREL16_LO:
8504 case R_PPC_GOT_DTPREL16_HI:
8505 case R_PPC_GOT_DTPREL16_HA:
8506 tls_type = TLS_TLS | TLS_DTPREL;
8507 goto dogot;
8508
8509 case R_PPC_GOT16:
8510 case R_PPC_GOT16_LO:
8511 case R_PPC_GOT16_HI:
8512 case R_PPC_GOT16_HA:
8513 tls_mask = 0;
8514 dogot:
8515 {
8516 /* Relocation is to the entry for this symbol in the global
8517 offset table. */
8518 bfd_vma off;
8519 bfd_vma *offp;
8520 unsigned long indx;
8521
8522 if (htab->got == NULL)
8523 abort ();
8524
8525 indx = 0;
8526 if (tls_type == (TLS_TLS | TLS_LD)
8527 && (h == NULL
8528 || !h->def_dynamic))
8529 offp = &htab->tlsld_got.offset;
8530 else if (h != NULL)
8531 {
8532 bfd_boolean dyn;
8533 dyn = htab->elf.dynamic_sections_created;
8534 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8535 || (bfd_link_pic (info)
8536 && SYMBOL_REFERENCES_LOCAL (info, h)))
8537 /* This is actually a static link, or it is a
8538 -Bsymbolic link and the symbol is defined
8539 locally, or the symbol was forced to be local
8540 because of a version file. */
8541 ;
8542 else
8543 {
8544 BFD_ASSERT (h->dynindx != -1);
8545 indx = h->dynindx;
8546 unresolved_reloc = FALSE;
8547 }
8548 offp = &h->got.offset;
8549 }
8550 else
8551 {
8552 if (local_got_offsets == NULL)
8553 abort ();
8554 offp = &local_got_offsets[r_symndx];
8555 }
8556
8557 /* The offset must always be a multiple of 4. We use the
8558 least significant bit to record whether we have already
8559 processed this entry. */
8560 off = *offp;
8561 if ((off & 1) != 0)
8562 off &= ~1;
8563 else
8564 {
8565 unsigned int tls_m = (tls_mask
8566 & (TLS_LD | TLS_GD | TLS_DTPREL
8567 | TLS_TPREL | TLS_TPRELGD));
8568
8569 if (offp == &htab->tlsld_got.offset)
8570 tls_m = TLS_LD;
8571 else if (h == NULL
8572 || !h->def_dynamic)
8573 tls_m &= ~TLS_LD;
8574
8575 /* We might have multiple got entries for this sym.
8576 Initialize them all. */
8577 do
8578 {
8579 int tls_ty = 0;
8580
8581 if ((tls_m & TLS_LD) != 0)
8582 {
8583 tls_ty = TLS_TLS | TLS_LD;
8584 tls_m &= ~TLS_LD;
8585 }
8586 else if ((tls_m & TLS_GD) != 0)
8587 {
8588 tls_ty = TLS_TLS | TLS_GD;
8589 tls_m &= ~TLS_GD;
8590 }
8591 else if ((tls_m & TLS_DTPREL) != 0)
8592 {
8593 tls_ty = TLS_TLS | TLS_DTPREL;
8594 tls_m &= ~TLS_DTPREL;
8595 }
8596 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8597 {
8598 tls_ty = TLS_TLS | TLS_TPREL;
8599 tls_m = 0;
8600 }
8601
8602 /* Generate relocs for the dynamic linker. */
8603 if ((bfd_link_pic (info) || indx != 0)
8604 && (offp == &htab->tlsld_got.offset
8605 || h == NULL
8606 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8607 || h->root.type != bfd_link_hash_undefweak))
8608 {
8609 asection *rsec = htab->relgot;
8610 bfd_byte * loc;
8611
8612 if (ifunc != NULL)
8613 rsec = htab->reliplt;
8614 outrel.r_offset = (htab->got->output_section->vma
8615 + htab->got->output_offset
8616 + off);
8617 outrel.r_addend = 0;
8618 if (tls_ty & (TLS_LD | TLS_GD))
8619 {
8620 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8621 if (tls_ty == (TLS_TLS | TLS_GD))
8622 {
8623 loc = rsec->contents;
8624 loc += (rsec->reloc_count++
8625 * sizeof (Elf32_External_Rela));
8626 bfd_elf32_swap_reloca_out (output_bfd,
8627 &outrel, loc);
8628 outrel.r_offset += 4;
8629 outrel.r_info
8630 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8631 }
8632 }
8633 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8634 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8635 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8636 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8637 else if (indx != 0)
8638 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8639 else if (ifunc != NULL)
8640 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8641 else
8642 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8643 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8644 {
8645 outrel.r_addend += relocation;
8646 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8647 {
8648 if (htab->elf.tls_sec == NULL)
8649 outrel.r_addend = 0;
8650 else
8651 outrel.r_addend -= htab->elf.tls_sec->vma;
8652 }
8653 }
8654 loc = rsec->contents;
8655 loc += (rsec->reloc_count++
8656 * sizeof (Elf32_External_Rela));
8657 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8658 }
8659
8660 /* Init the .got section contents if we're not
8661 emitting a reloc. */
8662 else
8663 {
8664 bfd_vma value = relocation;
8665
8666 if (tls_ty == (TLS_TLS | TLS_LD))
8667 value = 1;
8668 else if (tls_ty != 0)
8669 {
8670 if (htab->elf.tls_sec == NULL)
8671 value = 0;
8672 else
8673 {
8674 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8675 if (tls_ty == (TLS_TLS | TLS_TPREL))
8676 value += DTP_OFFSET - TP_OFFSET;
8677 }
8678
8679 if (tls_ty == (TLS_TLS | TLS_GD))
8680 {
8681 bfd_put_32 (input_bfd, value,
8682 htab->got->contents + off + 4);
8683 value = 1;
8684 }
8685 }
8686 bfd_put_32 (input_bfd, value,
8687 htab->got->contents + off);
8688 }
8689
8690 off += 4;
8691 if (tls_ty & (TLS_LD | TLS_GD))
8692 off += 4;
8693 }
8694 while (tls_m != 0);
8695
8696 off = *offp;
8697 *offp = off | 1;
8698 }
8699
8700 if (off >= (bfd_vma) -2)
8701 abort ();
8702
8703 if ((tls_type & TLS_TLS) != 0)
8704 {
8705 if (tls_type != (TLS_TLS | TLS_LD))
8706 {
8707 if ((tls_mask & TLS_LD) != 0
8708 && !(h == NULL
8709 || !h->def_dynamic))
8710 off += 8;
8711 if (tls_type != (TLS_TLS | TLS_GD))
8712 {
8713 if ((tls_mask & TLS_GD) != 0)
8714 off += 8;
8715 if (tls_type != (TLS_TLS | TLS_DTPREL))
8716 {
8717 if ((tls_mask & TLS_DTPREL) != 0)
8718 off += 4;
8719 }
8720 }
8721 }
8722 }
8723
8724 /* If here for a picfixup, we're done. */
8725 if (r_type != ELF32_R_TYPE (rel->r_info))
8726 goto copy_reloc;
8727
8728 relocation = (htab->got->output_section->vma
8729 + htab->got->output_offset
8730 + off
8731 - SYM_VAL (htab->elf.hgot));
8732
8733 /* Addends on got relocations don't make much sense.
8734 x+off@got is actually x@got+off, and since the got is
8735 generated by a hash table traversal, the value in the
8736 got at entry m+n bears little relation to the entry m. */
8737 if (addend != 0)
8738 info->callbacks->einfo
8739 /* xgettext:c-format */
8740 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8741 input_bfd, input_section, rel->r_offset,
8742 howto->name,
8743 sym_name);
8744 }
8745 break;
8746
8747 /* Relocations that need no special processing. */
8748 case R_PPC_LOCAL24PC:
8749 /* It makes no sense to point a local relocation
8750 at a symbol not in this object. */
8751 if (unresolved_reloc)
8752 {
8753 (*info->callbacks->undefined_symbol) (info,
8754 h->root.root.string,
8755 input_bfd,
8756 input_section,
8757 rel->r_offset,
8758 TRUE);
8759 goto copy_reloc;
8760 }
8761 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8762 {
8763 /* @local on an ifunc does not really make sense since
8764 the ifunc resolver can take you anywhere. More
8765 seriously, calls to ifuncs must go through a plt call
8766 stub, and for pic the plt call stubs uses r30 to
8767 access the PLT. The problem is that a call that is
8768 local won't have the +32k reloc addend trick marking
8769 -fPIC code, so the linker won't know whether r30 is
8770 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8771 /* xgettext:c-format */
8772 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8773 input_bfd, input_section, rel->r_offset,
8774 h->root.root.string);
8775 }
8776 break;
8777
8778 case R_PPC_DTPREL16:
8779 case R_PPC_DTPREL16_LO:
8780 case R_PPC_DTPREL16_HI:
8781 case R_PPC_DTPREL16_HA:
8782 if (htab->elf.tls_sec != NULL)
8783 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8784 break;
8785
8786 /* Relocations that may need to be propagated if this is a shared
8787 object. */
8788 case R_PPC_TPREL16:
8789 case R_PPC_TPREL16_LO:
8790 case R_PPC_TPREL16_HI:
8791 case R_PPC_TPREL16_HA:
8792 if (h != NULL
8793 && h->root.type == bfd_link_hash_undefweak
8794 && h->dynindx == -1)
8795 {
8796 /* Make this relocation against an undefined weak symbol
8797 resolve to zero. This is really just a tweak, since
8798 code using weak externs ought to check that they are
8799 defined before using them. */
8800 bfd_byte *p = contents + rel->r_offset - d_offset;
8801 unsigned int insn = bfd_get_32 (input_bfd, p);
8802 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8803 if (insn != 0)
8804 bfd_put_32 (input_bfd, insn, p);
8805 break;
8806 }
8807 if (htab->elf.tls_sec != NULL)
8808 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8809 /* The TPREL16 relocs shouldn't really be used in shared
8810 libs as they will result in DT_TEXTREL being set, but
8811 support them anyway. */
8812 goto dodyn;
8813
8814 case R_PPC_TPREL32:
8815 if (htab->elf.tls_sec != NULL)
8816 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8817 goto dodyn;
8818
8819 case R_PPC_DTPREL32:
8820 if (htab->elf.tls_sec != NULL)
8821 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8822 goto dodyn;
8823
8824 case R_PPC_DTPMOD32:
8825 relocation = 1;
8826 addend = 0;
8827 goto dodyn;
8828
8829 case R_PPC_REL16:
8830 case R_PPC_REL16_LO:
8831 case R_PPC_REL16_HI:
8832 case R_PPC_REL16_HA:
8833 case R_PPC_REL16DX_HA:
8834 break;
8835
8836 case R_PPC_REL32:
8837 if (h == NULL || h == htab->elf.hgot)
8838 break;
8839 /* fall through */
8840
8841 case R_PPC_ADDR32:
8842 case R_PPC_ADDR16:
8843 case R_PPC_ADDR16_LO:
8844 case R_PPC_ADDR16_HI:
8845 case R_PPC_ADDR16_HA:
8846 case R_PPC_UADDR32:
8847 case R_PPC_UADDR16:
8848 goto dodyn;
8849
8850 case R_PPC_VLE_REL8:
8851 case R_PPC_VLE_REL15:
8852 case R_PPC_VLE_REL24:
8853 case R_PPC_REL24:
8854 case R_PPC_REL14:
8855 case R_PPC_REL14_BRTAKEN:
8856 case R_PPC_REL14_BRNTAKEN:
8857 /* If these relocations are not to a named symbol, they can be
8858 handled right here, no need to bother the dynamic linker. */
8859 if (SYMBOL_CALLS_LOCAL (info, h)
8860 || h == htab->elf.hgot)
8861 break;
8862 /* fall through */
8863
8864 case R_PPC_ADDR24:
8865 case R_PPC_ADDR14:
8866 case R_PPC_ADDR14_BRTAKEN:
8867 case R_PPC_ADDR14_BRNTAKEN:
8868 if (h != NULL && !bfd_link_pic (info))
8869 break;
8870 /* fall through */
8871
8872 dodyn:
8873 if ((input_section->flags & SEC_ALLOC) == 0
8874 || is_vxworks_tls)
8875 break;
8876
8877 if ((bfd_link_pic (info)
8878 && !(h != NULL
8879 && ((h->root.type == bfd_link_hash_undefined
8880 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8881 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8882 || (h->root.type == bfd_link_hash_undefweak
8883 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8884 && (must_be_dyn_reloc (info, r_type)
8885 || !SYMBOL_CALLS_LOCAL (info, h)))
8886 || (ELIMINATE_COPY_RELOCS
8887 && !bfd_link_pic (info)
8888 && h != NULL
8889 && h->dynindx != -1
8890 && !h->non_got_ref
8891 && !h->def_regular
8892 && !(h->protected_def
8893 && ppc_elf_hash_entry (h)->has_addr16_ha
8894 && ppc_elf_hash_entry (h)->has_addr16_lo
8895 && htab->params->pic_fixup > 0)))
8896 {
8897 int skip;
8898 bfd_byte *loc;
8899 asection *sreloc;
8900 #ifdef DEBUG
8901 fprintf (stderr, "ppc_elf_relocate_section needs to "
8902 "create relocation for %s\n",
8903 (h && h->root.root.string
8904 ? h->root.root.string : "<unknown>"));
8905 #endif
8906
8907 /* When generating a shared object, these relocations
8908 are copied into the output file to be resolved at run
8909 time. */
8910 sreloc = elf_section_data (input_section)->sreloc;
8911 if (ifunc)
8912 sreloc = htab->reliplt;
8913 if (sreloc == NULL)
8914 return FALSE;
8915
8916 skip = 0;
8917 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8918 input_section,
8919 rel->r_offset);
8920 if (outrel.r_offset == (bfd_vma) -1
8921 || outrel.r_offset == (bfd_vma) -2)
8922 skip = (int) outrel.r_offset;
8923 outrel.r_offset += (input_section->output_section->vma
8924 + input_section->output_offset);
8925
8926 if (skip)
8927 memset (&outrel, 0, sizeof outrel);
8928 else if ((h != NULL
8929 && (h->root.type == bfd_link_hash_undefined
8930 || h->root.type == bfd_link_hash_undefweak))
8931 || !SYMBOL_REFERENCES_LOCAL (info, h))
8932 {
8933 BFD_ASSERT (h->dynindx != -1);
8934 unresolved_reloc = FALSE;
8935 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8936 outrel.r_addend = rel->r_addend;
8937 }
8938 else
8939 {
8940 outrel.r_addend = relocation + rel->r_addend;
8941
8942 if (r_type != R_PPC_ADDR32)
8943 {
8944 long indx = 0;
8945
8946 if (ifunc != NULL)
8947 {
8948 /* If we get here when building a static
8949 executable, then the libc startup function
8950 responsible for applying indirect function
8951 relocations is going to complain about
8952 the reloc type.
8953 If we get here when building a dynamic
8954 executable, it will be because we have
8955 a text relocation. The dynamic loader
8956 will set the text segment writable and
8957 non-executable to apply text relocations.
8958 So we'll segfault when trying to run the
8959 indirection function to resolve the reloc. */
8960 info->callbacks->einfo
8961 /* xgettext:c-format */
8962 (_("%P: %H: relocation %s for indirect "
8963 "function %s unsupported\n"),
8964 input_bfd, input_section, rel->r_offset,
8965 howto->name,
8966 sym_name);
8967 ret = FALSE;
8968 }
8969 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8970 ;
8971 else if (sec == NULL || sec->owner == NULL)
8972 {
8973 bfd_set_error (bfd_error_bad_value);
8974 ret = FALSE;
8975 }
8976 else
8977 {
8978 asection *osec;
8979
8980 /* We are turning this relocation into one
8981 against a section symbol. It would be
8982 proper to subtract the symbol's value,
8983 osec->vma, from the emitted reloc addend,
8984 but ld.so expects buggy relocs.
8985 FIXME: Why not always use a zero index? */
8986 osec = sec->output_section;
8987 indx = elf_section_data (osec)->dynindx;
8988 if (indx == 0)
8989 {
8990 osec = htab->elf.text_index_section;
8991 indx = elf_section_data (osec)->dynindx;
8992 }
8993 BFD_ASSERT (indx != 0);
8994 #ifdef DEBUG
8995 if (indx == 0)
8996 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8997 indx, osec->name, osec->flags,
8998 h->root.root.string);
8999 #endif
9000 }
9001
9002 outrel.r_info = ELF32_R_INFO (indx, r_type);
9003 }
9004 else if (ifunc != NULL)
9005 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9006 else
9007 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9008 }
9009
9010 loc = sreloc->contents;
9011 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9012 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9013
9014 if (skip == -1)
9015 goto copy_reloc;
9016
9017 /* This reloc will be computed at runtime. We clear the memory
9018 so that it contains predictable value. */
9019 if (! skip
9020 && ((input_section->flags & SEC_ALLOC) != 0
9021 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
9022 {
9023 relocation = howto->pc_relative ? outrel.r_offset : 0;
9024 addend = 0;
9025 break;
9026 }
9027 }
9028 break;
9029
9030 case R_PPC_RELAX_PLT:
9031 case R_PPC_RELAX_PLTREL24:
9032 if (h != NULL)
9033 {
9034 struct plt_entry *ent;
9035 bfd_vma got2_addend = 0;
9036
9037 if (r_type == R_PPC_RELAX_PLTREL24)
9038 {
9039 if (bfd_link_pic (info))
9040 got2_addend = addend;
9041 addend = 0;
9042 }
9043 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9044 if (htab->plt_type == PLT_NEW)
9045 relocation = (htab->glink->output_section->vma
9046 + htab->glink->output_offset
9047 + ent->glink_offset);
9048 else
9049 relocation = (htab->plt->output_section->vma
9050 + htab->plt->output_offset
9051 + ent->plt.offset);
9052 }
9053 /* Fall through. */
9054
9055 case R_PPC_RELAX:
9056 {
9057 const int *stub;
9058 size_t size;
9059 size_t insn_offset = rel->r_offset;
9060 unsigned int insn;
9061
9062 if (bfd_link_pic (info))
9063 {
9064 relocation -= (input_section->output_section->vma
9065 + input_section->output_offset
9066 + rel->r_offset - 4);
9067 stub = shared_stub_entry;
9068 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9069 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9070 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9071 stub += 3;
9072 size = ARRAY_SIZE (shared_stub_entry) - 3;
9073 }
9074 else
9075 {
9076 stub = stub_entry;
9077 size = ARRAY_SIZE (stub_entry);
9078 }
9079
9080 relocation += addend;
9081 if (bfd_link_relocatable (info))
9082 relocation = 0;
9083
9084 /* First insn is HA, second is LO. */
9085 insn = *stub++;
9086 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9087 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9088 insn_offset += 4;
9089
9090 insn = *stub++;
9091 insn |= relocation & 0xffff;
9092 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9093 insn_offset += 4;
9094 size -= 2;
9095
9096 while (size != 0)
9097 {
9098 insn = *stub++;
9099 --size;
9100 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9101 insn_offset += 4;
9102 }
9103
9104 /* Rewrite the reloc and convert one of the trailing nop
9105 relocs to describe this relocation. */
9106 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9107 /* The relocs are at the bottom 2 bytes */
9108 wrel->r_offset = rel->r_offset + d_offset;
9109 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9110 wrel->r_addend = rel->r_addend;
9111 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9112 wrel++, rel++;
9113 wrel->r_offset += 4;
9114 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9115 }
9116 continue;
9117
9118 /* Indirect .sdata relocation. */
9119 case R_PPC_EMB_SDAI16:
9120 BFD_ASSERT (htab->sdata[0].section != NULL);
9121 if (!is_static_defined (htab->sdata[0].sym))
9122 {
9123 unresolved_reloc = TRUE;
9124 break;
9125 }
9126 relocation
9127 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9128 h, relocation, rel);
9129 addend = 0;
9130 break;
9131
9132 /* Indirect .sdata2 relocation. */
9133 case R_PPC_EMB_SDA2I16:
9134 BFD_ASSERT (htab->sdata[1].section != NULL);
9135 if (!is_static_defined (htab->sdata[1].sym))
9136 {
9137 unresolved_reloc = TRUE;
9138 break;
9139 }
9140 relocation
9141 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9142 h, relocation, rel);
9143 addend = 0;
9144 break;
9145
9146 /* Handle the TOC16 reloc. We want to use the offset within the .got
9147 section, not the actual VMA. This is appropriate when generating
9148 an embedded ELF object, for which the .got section acts like the
9149 AIX .toc section. */
9150 case R_PPC_TOC16: /* phony GOT16 relocations */
9151 if (sec == NULL || sec->output_section == NULL)
9152 {
9153 unresolved_reloc = TRUE;
9154 break;
9155 }
9156 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9157 ".got") == 0
9158 || strcmp (bfd_get_section_name (sec->owner, sec),
9159 ".cgot") == 0);
9160
9161 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9162 break;
9163
9164 case R_PPC_PLTREL24:
9165 if (h != NULL && ifunc == NULL)
9166 {
9167 struct plt_entry *ent;
9168
9169 ent = find_plt_ent (&h->plt.plist, got2,
9170 bfd_link_pic (info) ? addend : 0);
9171 if (ent == NULL
9172 || htab->plt == NULL)
9173 {
9174 /* We didn't make a PLT entry for this symbol. This
9175 happens when statically linking PIC code, or when
9176 using -Bsymbolic. */
9177 }
9178 else
9179 {
9180 /* Relocation is to the entry for this symbol in the
9181 procedure linkage table. */
9182 unresolved_reloc = FALSE;
9183 if (htab->plt_type == PLT_NEW)
9184 relocation = (htab->glink->output_section->vma
9185 + htab->glink->output_offset
9186 + ent->glink_offset);
9187 else
9188 relocation = (htab->plt->output_section->vma
9189 + htab->plt->output_offset
9190 + ent->plt.offset);
9191 }
9192 }
9193
9194 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9195 addend specifies the GOT pointer offset within .got2.
9196 Don't apply it to the relocation field. */
9197 addend = 0;
9198 break;
9199
9200 /* Relocate against _SDA_BASE_. */
9201 case R_PPC_SDAREL16:
9202 {
9203 const char *name;
9204 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9205
9206 if (sec == NULL
9207 || sec->output_section == NULL
9208 || !is_static_defined (sda))
9209 {
9210 unresolved_reloc = TRUE;
9211 break;
9212 }
9213 addend -= SYM_VAL (sda);
9214
9215 name = bfd_get_section_name (output_bfd, sec->output_section);
9216 if (!(strcmp (name, ".sdata") == 0
9217 || strcmp (name, ".sbss") == 0))
9218 {
9219 info->callbacks->einfo
9220 /* xgettext:c-format */
9221 (_("%P: %B: the target (%s) of a %s relocation is "
9222 "in the wrong output section (%s)\n"),
9223 input_bfd,
9224 sym_name,
9225 howto->name,
9226 name);
9227 }
9228 }
9229 break;
9230
9231 /* Relocate against _SDA2_BASE_. */
9232 case R_PPC_EMB_SDA2REL:
9233 {
9234 const char *name;
9235 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9236
9237 if (sec == NULL
9238 || sec->output_section == NULL
9239 || !is_static_defined (sda))
9240 {
9241 unresolved_reloc = TRUE;
9242 break;
9243 }
9244 addend -= SYM_VAL (sda);
9245
9246 name = bfd_get_section_name (output_bfd, sec->output_section);
9247 if (!(strcmp (name, ".sdata2") == 0
9248 || strcmp (name, ".sbss2") == 0))
9249 {
9250 info->callbacks->einfo
9251 /* xgettext:c-format */
9252 (_("%P: %B: the target (%s) of a %s relocation is "
9253 "in the wrong output section (%s)\n"),
9254 input_bfd,
9255 sym_name,
9256 howto->name,
9257 name);
9258 }
9259 }
9260 break;
9261
9262 case R_PPC_VLE_LO16A:
9263 relocation = relocation + addend;
9264 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9265 contents + rel->r_offset, relocation,
9266 split16a_type, htab->params->vle_reloc_fixup);
9267 goto copy_reloc;
9268
9269 case R_PPC_VLE_LO16D:
9270 relocation = relocation + addend;
9271 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9272 contents + rel->r_offset, relocation,
9273 split16d_type, htab->params->vle_reloc_fixup);
9274 goto copy_reloc;
9275
9276 case R_PPC_VLE_HI16A:
9277 relocation = (relocation + addend) >> 16;
9278 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9279 contents + rel->r_offset, relocation,
9280 split16a_type, htab->params->vle_reloc_fixup);
9281 goto copy_reloc;
9282
9283 case R_PPC_VLE_HI16D:
9284 relocation = (relocation + addend) >> 16;
9285 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9286 contents + rel->r_offset, relocation,
9287 split16d_type, htab->params->vle_reloc_fixup);
9288 goto copy_reloc;
9289
9290 case R_PPC_VLE_HA16A:
9291 relocation = (relocation + addend + 0x8000) >> 16;
9292 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9293 contents + rel->r_offset, relocation,
9294 split16a_type, htab->params->vle_reloc_fixup);
9295 goto copy_reloc;
9296
9297 case R_PPC_VLE_HA16D:
9298 relocation = (relocation + addend + 0x8000) >> 16;
9299 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9300 contents + rel->r_offset, relocation,
9301 split16d_type, htab->params->vle_reloc_fixup);
9302 goto copy_reloc;
9303
9304 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9305 case R_PPC_EMB_SDA21:
9306 case R_PPC_VLE_SDA21:
9307 case R_PPC_EMB_RELSDA:
9308 case R_PPC_VLE_SDA21_LO:
9309 {
9310 const char *name;
9311 int reg;
9312 unsigned int insn;
9313 struct elf_link_hash_entry *sda = NULL;
9314
9315 if (sec == NULL || sec->output_section == NULL)
9316 {
9317 unresolved_reloc = TRUE;
9318 break;
9319 }
9320
9321 name = bfd_get_section_name (output_bfd, sec->output_section);
9322 if (strcmp (name, ".sdata") == 0
9323 || strcmp (name, ".sbss") == 0)
9324 {
9325 reg = 13;
9326 sda = htab->sdata[0].sym;
9327 }
9328 else if (strcmp (name, ".sdata2") == 0
9329 || strcmp (name, ".sbss2") == 0)
9330 {
9331 reg = 2;
9332 sda = htab->sdata[1].sym;
9333 }
9334 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9335 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9336 {
9337 reg = 0;
9338 }
9339 else
9340 {
9341 info->callbacks->einfo
9342 /* xgettext:c-format */
9343 (_("%P: %B: the target (%s) of a %s relocation is "
9344 "in the wrong output section (%s)\n"),
9345 input_bfd,
9346 sym_name,
9347 howto->name,
9348 name);
9349
9350 bfd_set_error (bfd_error_bad_value);
9351 ret = FALSE;
9352 goto copy_reloc;
9353 }
9354
9355 if (sda != NULL)
9356 {
9357 if (!is_static_defined (sda))
9358 {
9359 unresolved_reloc = TRUE;
9360 break;
9361 }
9362 addend -= SYM_VAL (sda);
9363 }
9364
9365 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9366 if (reg == 0
9367 && (r_type == R_PPC_VLE_SDA21
9368 || r_type == R_PPC_VLE_SDA21_LO))
9369 {
9370 relocation = relocation + addend;
9371 addend = 0;
9372
9373 /* Force e_li insn, keeping RT from original insn. */
9374 insn &= 0x1f << 21;
9375 insn |= 28u << 26;
9376
9377 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9378 /* Top 4 bits of value to 17..20. */
9379 insn |= (relocation & 0xf0000) >> 5;
9380 /* Next 5 bits of the value to 11..15. */
9381 insn |= (relocation & 0xf800) << 5;
9382 /* And the final 11 bits of the value to bits 21 to 31. */
9383 insn |= relocation & 0x7ff;
9384
9385 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9386
9387 if (r_type == R_PPC_VLE_SDA21
9388 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9389 goto overflow;
9390 goto copy_reloc;
9391 }
9392 else if (r_type == R_PPC_EMB_SDA21
9393 || r_type == R_PPC_VLE_SDA21
9394 || r_type == R_PPC_VLE_SDA21_LO)
9395 {
9396 /* Fill in register field. */
9397 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9398 }
9399 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9400 }
9401 break;
9402
9403 case R_PPC_VLE_SDAREL_LO16A:
9404 case R_PPC_VLE_SDAREL_LO16D:
9405 case R_PPC_VLE_SDAREL_HI16A:
9406 case R_PPC_VLE_SDAREL_HI16D:
9407 case R_PPC_VLE_SDAREL_HA16A:
9408 case R_PPC_VLE_SDAREL_HA16D:
9409 {
9410 bfd_vma value;
9411 const char *name;
9412 //int reg;
9413 struct elf_link_hash_entry *sda = NULL;
9414
9415 if (sec == NULL || sec->output_section == NULL)
9416 {
9417 unresolved_reloc = TRUE;
9418 break;
9419 }
9420
9421 name = bfd_get_section_name (output_bfd, sec->output_section);
9422 if (strcmp (name, ".sdata") == 0
9423 || strcmp (name, ".sbss") == 0)
9424 {
9425 //reg = 13;
9426 sda = htab->sdata[0].sym;
9427 }
9428 else if (strcmp (name, ".sdata2") == 0
9429 || strcmp (name, ".sbss2") == 0)
9430 {
9431 //reg = 2;
9432 sda = htab->sdata[1].sym;
9433 }
9434 else
9435 {
9436 _bfd_error_handler
9437 /* xgettext:c-format */
9438 (_("%B: the target (%s) of a %s relocation is "
9439 "in the wrong output section (%s)"),
9440 input_bfd,
9441 sym_name,
9442 howto->name,
9443 name);
9444
9445 bfd_set_error (bfd_error_bad_value);
9446 ret = FALSE;
9447 goto copy_reloc;
9448 }
9449
9450 if (sda != NULL)
9451 {
9452 if (!is_static_defined (sda))
9453 {
9454 unresolved_reloc = TRUE;
9455 break;
9456 }
9457 }
9458
9459 value = (sda->root.u.def.section->output_section->vma
9460 + sda->root.u.def.section->output_offset
9461 + addend);
9462
9463 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9464 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9465 contents + rel->r_offset, value,
9466 split16a_type,
9467 htab->params->vle_reloc_fixup);
9468 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9469 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9470 contents + rel->r_offset, value,
9471 split16d_type,
9472 htab->params->vle_reloc_fixup);
9473 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9474 {
9475 value = value >> 16;
9476 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9477 contents + rel->r_offset, value,
9478 split16a_type,
9479 htab->params->vle_reloc_fixup);
9480 }
9481 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9482 {
9483 value = value >> 16;
9484 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9485 contents + rel->r_offset, value,
9486 split16d_type,
9487 htab->params->vle_reloc_fixup);
9488 }
9489 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9490 {
9491 value = (value + 0x8000) >> 16;
9492 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9493 contents + rel->r_offset, value,
9494 split16a_type,
9495 htab->params->vle_reloc_fixup);
9496 }
9497 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9498 {
9499 value = (value + 0x8000) >> 16;
9500 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9501 contents + rel->r_offset, value,
9502 split16d_type,
9503 htab->params->vle_reloc_fixup);
9504 }
9505 }
9506 goto copy_reloc;
9507
9508 /* Relocate against the beginning of the section. */
9509 case R_PPC_SECTOFF:
9510 case R_PPC_SECTOFF_LO:
9511 case R_PPC_SECTOFF_HI:
9512 case R_PPC_SECTOFF_HA:
9513 if (sec == NULL || sec->output_section == NULL)
9514 {
9515 unresolved_reloc = TRUE;
9516 break;
9517 }
9518 addend -= sec->output_section->vma;
9519 break;
9520
9521 /* Negative relocations. */
9522 case R_PPC_EMB_NADDR32:
9523 case R_PPC_EMB_NADDR16:
9524 case R_PPC_EMB_NADDR16_LO:
9525 case R_PPC_EMB_NADDR16_HI:
9526 case R_PPC_EMB_NADDR16_HA:
9527 addend -= 2 * relocation;
9528 break;
9529
9530 case R_PPC_COPY:
9531 case R_PPC_GLOB_DAT:
9532 case R_PPC_JMP_SLOT:
9533 case R_PPC_RELATIVE:
9534 case R_PPC_IRELATIVE:
9535 case R_PPC_PLT32:
9536 case R_PPC_PLTREL32:
9537 case R_PPC_PLT16_LO:
9538 case R_PPC_PLT16_HI:
9539 case R_PPC_PLT16_HA:
9540 case R_PPC_ADDR30:
9541 case R_PPC_EMB_RELSEC16:
9542 case R_PPC_EMB_RELST_LO:
9543 case R_PPC_EMB_RELST_HI:
9544 case R_PPC_EMB_RELST_HA:
9545 case R_PPC_EMB_BIT_FLD:
9546 info->callbacks->einfo
9547 /* xgettext:c-format */
9548 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9549 input_bfd,
9550 howto->name,
9551 sym_name);
9552
9553 bfd_set_error (bfd_error_invalid_operation);
9554 ret = FALSE;
9555 goto copy_reloc;
9556 }
9557
9558 /* Do any further special processing. */
9559 switch (r_type)
9560 {
9561 default:
9562 break;
9563
9564 case R_PPC_ADDR16_HA:
9565 case R_PPC_REL16_HA:
9566 case R_PPC_REL16DX_HA:
9567 case R_PPC_SECTOFF_HA:
9568 case R_PPC_TPREL16_HA:
9569 case R_PPC_DTPREL16_HA:
9570 case R_PPC_EMB_NADDR16_HA:
9571 case R_PPC_EMB_RELST_HA:
9572 /* It's just possible that this symbol is a weak symbol
9573 that's not actually defined anywhere. In that case,
9574 'sec' would be NULL, and we should leave the symbol
9575 alone (it will be set to zero elsewhere in the link). */
9576 if (sec == NULL)
9577 break;
9578 /* Fall through. */
9579
9580 case R_PPC_PLT16_HA:
9581 case R_PPC_GOT16_HA:
9582 case R_PPC_GOT_TLSGD16_HA:
9583 case R_PPC_GOT_TLSLD16_HA:
9584 case R_PPC_GOT_TPREL16_HA:
9585 case R_PPC_GOT_DTPREL16_HA:
9586 /* Add 0x10000 if sign bit in 0:15 is set.
9587 Bits 0:15 are not used. */
9588 addend += 0x8000;
9589 break;
9590
9591 case R_PPC_ADDR16:
9592 case R_PPC_ADDR16_LO:
9593 case R_PPC_GOT16:
9594 case R_PPC_GOT16_LO:
9595 case R_PPC_SDAREL16:
9596 case R_PPC_SECTOFF:
9597 case R_PPC_SECTOFF_LO:
9598 case R_PPC_DTPREL16:
9599 case R_PPC_DTPREL16_LO:
9600 case R_PPC_TPREL16:
9601 case R_PPC_TPREL16_LO:
9602 case R_PPC_GOT_TLSGD16:
9603 case R_PPC_GOT_TLSGD16_LO:
9604 case R_PPC_GOT_TLSLD16:
9605 case R_PPC_GOT_TLSLD16_LO:
9606 case R_PPC_GOT_DTPREL16:
9607 case R_PPC_GOT_DTPREL16_LO:
9608 case R_PPC_GOT_TPREL16:
9609 case R_PPC_GOT_TPREL16_LO:
9610 {
9611 /* The 32-bit ABI lacks proper relocations to deal with
9612 certain 64-bit instructions. Prevent damage to bits
9613 that make up part of the insn opcode. */
9614 unsigned int insn, mask, lobit;
9615
9616 insn = bfd_get_32 (input_bfd,
9617 contents + rel->r_offset - d_offset);
9618 mask = 0;
9619 if (is_insn_ds_form (insn))
9620 mask = 3;
9621 else if (is_insn_dq_form (insn))
9622 mask = 15;
9623 else
9624 break;
9625 relocation += addend;
9626 addend = insn & mask;
9627 lobit = mask & relocation;
9628 if (lobit != 0)
9629 {
9630 relocation ^= lobit;
9631 info->callbacks->einfo
9632 /* xgettext:c-format */
9633 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9634 input_bfd, input_section, rel->r_offset,
9635 howto->name, sym_name, mask + 1);
9636 bfd_set_error (bfd_error_bad_value);
9637 ret = FALSE;
9638 }
9639 }
9640 break;
9641 }
9642
9643 #ifdef DEBUG
9644 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9645 "offset = %ld, addend = %ld\n",
9646 howto->name,
9647 (int) r_type,
9648 sym_name,
9649 r_symndx,
9650 (long) rel->r_offset,
9651 (long) addend);
9652 #endif
9653
9654 if (unresolved_reloc
9655 && !((input_section->flags & SEC_DEBUGGING) != 0
9656 && h->def_dynamic)
9657 && _bfd_elf_section_offset (output_bfd, info, input_section,
9658 rel->r_offset) != (bfd_vma) -1)
9659 {
9660 info->callbacks->einfo
9661 /* xgettext:c-format */
9662 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9663 input_bfd, input_section, rel->r_offset,
9664 howto->name,
9665 sym_name);
9666 ret = FALSE;
9667 }
9668
9669 /* 16-bit fields in insns mostly have signed values, but a
9670 few insns have 16-bit unsigned values. Really, we should
9671 have different reloc types. */
9672 if (howto->complain_on_overflow != complain_overflow_dont
9673 && howto->dst_mask == 0xffff
9674 && (input_section->flags & SEC_CODE) != 0)
9675 {
9676 enum complain_overflow complain = complain_overflow_signed;
9677
9678 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9679 {
9680 unsigned int insn;
9681
9682 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9683 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9684 complain = complain_overflow_bitfield;
9685 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9686 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9687 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9688 complain = complain_overflow_unsigned;
9689 }
9690 if (howto->complain_on_overflow != complain)
9691 {
9692 alt_howto = *howto;
9693 alt_howto.complain_on_overflow = complain;
9694 howto = &alt_howto;
9695 }
9696 }
9697
9698 if (r_type == R_PPC_REL16DX_HA)
9699 {
9700 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9701 if (rel->r_offset + 4 > input_section->size)
9702 r = bfd_reloc_outofrange;
9703 else
9704 {
9705 unsigned int insn;
9706
9707 relocation += addend;
9708 relocation -= (rel->r_offset
9709 + input_section->output_offset
9710 + input_section->output_section->vma);
9711 relocation >>= 16;
9712 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9713 insn &= ~0x1fffc1;
9714 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9715 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9716 r = bfd_reloc_ok;
9717 }
9718 }
9719 else
9720 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9721 rel->r_offset, relocation, addend);
9722
9723 if (r != bfd_reloc_ok)
9724 {
9725 if (r == bfd_reloc_overflow)
9726 {
9727 overflow:
9728 /* On code like "if (foo) foo();" don't report overflow
9729 on a branch to zero when foo is undefined. */
9730 if (!warned
9731 && !(h != NULL
9732 && (h->root.type == bfd_link_hash_undefweak
9733 || h->root.type == bfd_link_hash_undefined)
9734 && is_branch_reloc (r_type)))
9735 info->callbacks->reloc_overflow
9736 (info, (h ? &h->root : NULL), sym_name, howto->name,
9737 rel->r_addend, input_bfd, input_section, rel->r_offset);
9738 }
9739 else
9740 {
9741 info->callbacks->einfo
9742 /* xgettext:c-format */
9743 (_("%P: %H: %s reloc against `%s': error %d\n"),
9744 input_bfd, input_section, rel->r_offset,
9745 howto->name, sym_name, (int) r);
9746 ret = FALSE;
9747 }
9748 }
9749 copy_reloc:
9750 if (wrel != rel)
9751 *wrel = *rel;
9752 }
9753
9754 if (wrel != rel)
9755 {
9756 Elf_Internal_Shdr *rel_hdr;
9757 size_t deleted = rel - wrel;
9758
9759 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9760 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9761 if (rel_hdr->sh_size == 0)
9762 {
9763 /* It is too late to remove an empty reloc section. Leave
9764 one NONE reloc.
9765 ??? What is wrong with an empty section??? */
9766 rel_hdr->sh_size = rel_hdr->sh_entsize;
9767 deleted -= 1;
9768 wrel++;
9769 }
9770 relend = wrel;
9771 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9772 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9773 input_section->reloc_count -= deleted;
9774 }
9775
9776 #ifdef DEBUG
9777 fprintf (stderr, "\n");
9778 #endif
9779
9780 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9781 && input_section->size != input_section->rawsize
9782 && (strcmp (input_section->output_section->name, ".init") == 0
9783 || strcmp (input_section->output_section->name, ".fini") == 0))
9784 {
9785 /* Branch around the trampolines. */
9786 unsigned int insn = B + input_section->size - input_section->rawsize;
9787 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9788 }
9789
9790 if (htab->params->ppc476_workaround
9791 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9792 && (!bfd_link_relocatable (info)
9793 || (input_section->output_section->alignment_power
9794 >= htab->params->pagesize_p2)))
9795 {
9796 bfd_vma start_addr, end_addr, addr;
9797 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9798
9799 if (relax_info->workaround_size != 0)
9800 {
9801 bfd_byte *p;
9802 unsigned int n;
9803 bfd_byte fill[4];
9804
9805 bfd_put_32 (input_bfd, BA, fill);
9806 p = contents + input_section->size - relax_info->workaround_size;
9807 n = relax_info->workaround_size >> 2;
9808 while (n--)
9809 {
9810 memcpy (p, fill, 4);
9811 p += 4;
9812 }
9813 }
9814
9815 /* The idea is: Replace the last instruction on a page with a
9816 branch to a patch area. Put the insn there followed by a
9817 branch back to the next page. Complicated a little by
9818 needing to handle moved conditional branches, and by not
9819 wanting to touch data-in-text. */
9820
9821 start_addr = (input_section->output_section->vma
9822 + input_section->output_offset);
9823 end_addr = (start_addr + input_section->size
9824 - relax_info->workaround_size);
9825 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9826 addr < end_addr;
9827 addr += pagesize)
9828 {
9829 bfd_vma offset = addr - start_addr;
9830 Elf_Internal_Rela *lo, *hi;
9831 bfd_boolean is_data;
9832 bfd_vma patch_off, patch_addr;
9833 unsigned int insn;
9834
9835 /* Do we have a data reloc at this offset? If so, leave
9836 the word alone. */
9837 is_data = FALSE;
9838 lo = relocs;
9839 hi = relend;
9840 rel = NULL;
9841 while (lo < hi)
9842 {
9843 rel = lo + (hi - lo) / 2;
9844 if (rel->r_offset < offset)
9845 lo = rel + 1;
9846 else if (rel->r_offset > offset + 3)
9847 hi = rel;
9848 else
9849 {
9850 switch (ELF32_R_TYPE (rel->r_info))
9851 {
9852 case R_PPC_ADDR32:
9853 case R_PPC_UADDR32:
9854 case R_PPC_REL32:
9855 case R_PPC_ADDR30:
9856 is_data = TRUE;
9857 break;
9858 default:
9859 break;
9860 }
9861 break;
9862 }
9863 }
9864 if (is_data)
9865 continue;
9866
9867 /* Some instructions can be left alone too. Unconditional
9868 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9869 avoid the icache failure.
9870
9871 The problem occurs due to prefetch across a page boundary
9872 where stale instructions can be fetched from the next
9873 page, and the mechanism for flushing these bad
9874 instructions fails under certain circumstances. The
9875 unconditional branches:
9876 1) Branch: b, bl, ba, bla,
9877 2) Branch Conditional: bc, bca, bcl, bcla,
9878 3) Branch Conditional to Link Register: bclr, bclrl,
9879 where (2) and (3) have BO=0x14 making them unconditional,
9880 prevent the bad prefetch because the prefetch itself is
9881 affected by these instructions. This happens even if the
9882 instruction is not executed.
9883
9884 A bctr example:
9885 .
9886 . lis 9,new_page@ha
9887 . addi 9,9,new_page@l
9888 . mtctr 9
9889 . bctr
9890 . nop
9891 . nop
9892 . new_page:
9893 .
9894 The bctr is not predicted taken due to ctr not being
9895 ready, so prefetch continues on past the bctr into the
9896 new page which might have stale instructions. If they
9897 fail to be flushed, then they will be executed after the
9898 bctr executes. Either of the following modifications
9899 prevent the bad prefetch from happening in the first
9900 place:
9901 .
9902 . lis 9,new_page@ha lis 9,new_page@ha
9903 . addi 9,9,new_page@l addi 9,9,new_page@l
9904 . mtctr 9 mtctr 9
9905 . bctr bctr
9906 . nop b somewhere_else
9907 . b somewhere_else nop
9908 . new_page: new_page:
9909 . */
9910 insn = bfd_get_32 (input_bfd, contents + offset);
9911 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9912 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9913 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9914 || ((insn & (0x3f << 26)) == (19u << 26)
9915 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9916 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9917 continue;
9918
9919 patch_addr = (start_addr + input_section->size
9920 - relax_info->workaround_size);
9921 patch_addr = (patch_addr + 15) & -16;
9922 patch_off = patch_addr - start_addr;
9923 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9924
9925 if (rel != NULL
9926 && rel->r_offset >= offset
9927 && rel->r_offset < offset + 4)
9928 {
9929 asection *sreloc;
9930
9931 /* If the insn we are patching had a reloc, adjust the
9932 reloc r_offset so that the reloc applies to the moved
9933 location. This matters for -r and --emit-relocs. */
9934 if (rel + 1 != relend)
9935 {
9936 Elf_Internal_Rela tmp = *rel;
9937
9938 /* Keep the relocs sorted by r_offset. */
9939 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9940 relend[-1] = tmp;
9941 }
9942 relend[-1].r_offset += patch_off - offset;
9943
9944 /* Adjust REL16 addends too. */
9945 switch (ELF32_R_TYPE (relend[-1].r_info))
9946 {
9947 case R_PPC_REL16:
9948 case R_PPC_REL16_LO:
9949 case R_PPC_REL16_HI:
9950 case R_PPC_REL16_HA:
9951 relend[-1].r_addend += patch_off - offset;
9952 break;
9953 default:
9954 break;
9955 }
9956
9957 /* If we are building a PIE or shared library with
9958 non-PIC objects, perhaps we had a dynamic reloc too?
9959 If so, the dynamic reloc must move with the insn. */
9960 sreloc = elf_section_data (input_section)->sreloc;
9961 if (sreloc != NULL)
9962 {
9963 Elf32_External_Rela *slo, *shi, *srelend;
9964 bfd_vma soffset;
9965
9966 slo = (Elf32_External_Rela *) sreloc->contents;
9967 shi = srelend = slo + sreloc->reloc_count;
9968 soffset = (offset + input_section->output_section->vma
9969 + input_section->output_offset);
9970 while (slo < shi)
9971 {
9972 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9973 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9974 &outrel);
9975 if (outrel.r_offset < soffset)
9976 slo = srel + 1;
9977 else if (outrel.r_offset > soffset + 3)
9978 shi = srel;
9979 else
9980 {
9981 if (srel + 1 != srelend)
9982 {
9983 memmove (srel, srel + 1,
9984 (srelend - (srel + 1)) * sizeof (*srel));
9985 srel = srelend - 1;
9986 }
9987 outrel.r_offset += patch_off - offset;
9988 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9989 (bfd_byte *) srel);
9990 break;
9991 }
9992 }
9993 }
9994 }
9995 else
9996 rel = NULL;
9997
9998 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9999 && (insn & 2) == 0 /* relative */)
10000 {
10001 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10002
10003 delta += offset - patch_off;
10004 if (bfd_link_relocatable (info) && rel != NULL)
10005 delta = 0;
10006 if (!bfd_link_relocatable (info) && rel != NULL)
10007 {
10008 enum elf_ppc_reloc_type r_type;
10009
10010 r_type = ELF32_R_TYPE (relend[-1].r_info);
10011 if (r_type == R_PPC_REL14_BRTAKEN)
10012 insn |= BRANCH_PREDICT_BIT;
10013 else if (r_type == R_PPC_REL14_BRNTAKEN)
10014 insn &= ~BRANCH_PREDICT_BIT;
10015 else
10016 BFD_ASSERT (r_type == R_PPC_REL14);
10017
10018 if ((r_type == R_PPC_REL14_BRTAKEN
10019 || r_type == R_PPC_REL14_BRNTAKEN)
10020 && delta + 0x8000 < 0x10000
10021 && (bfd_signed_vma) delta < 0)
10022 insn ^= BRANCH_PREDICT_BIT;
10023 }
10024 if (delta + 0x8000 < 0x10000)
10025 {
10026 bfd_put_32 (input_bfd,
10027 (insn & ~0xfffc) | (delta & 0xfffc),
10028 contents + patch_off);
10029 patch_off += 4;
10030 bfd_put_32 (input_bfd,
10031 B | ((offset + 4 - patch_off) & 0x3fffffc),
10032 contents + patch_off);
10033 patch_off += 4;
10034 }
10035 else
10036 {
10037 if (rel != NULL)
10038 {
10039 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10040
10041 relend[-1].r_offset += 8;
10042 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10043 }
10044 bfd_put_32 (input_bfd,
10045 (insn & ~0xfffc) | 8,
10046 contents + patch_off);
10047 patch_off += 4;
10048 bfd_put_32 (input_bfd,
10049 B | ((offset + 4 - patch_off) & 0x3fffffc),
10050 contents + patch_off);
10051 patch_off += 4;
10052 bfd_put_32 (input_bfd,
10053 B | ((delta - 8) & 0x3fffffc),
10054 contents + patch_off);
10055 patch_off += 4;
10056 }
10057 }
10058 else
10059 {
10060 bfd_put_32 (input_bfd, insn, contents + patch_off);
10061 patch_off += 4;
10062 bfd_put_32 (input_bfd,
10063 B | ((offset + 4 - patch_off) & 0x3fffffc),
10064 contents + patch_off);
10065 patch_off += 4;
10066 }
10067 BFD_ASSERT (patch_off <= input_section->size);
10068 relax_info->workaround_size = input_section->size - patch_off;
10069 }
10070 }
10071
10072 return ret;
10073 }
10074 \f
10075 /* Finish up dynamic symbol handling. We set the contents of various
10076 dynamic sections here. */
10077
10078 static bfd_boolean
10079 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10080 struct bfd_link_info *info,
10081 struct elf_link_hash_entry *h,
10082 Elf_Internal_Sym *sym)
10083 {
10084 struct ppc_elf_link_hash_table *htab;
10085 struct plt_entry *ent;
10086 bfd_boolean doneone;
10087
10088 #ifdef DEBUG
10089 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10090 h->root.root.string);
10091 #endif
10092
10093 htab = ppc_elf_hash_table (info);
10094 BFD_ASSERT (htab->elf.dynobj != NULL);
10095
10096 doneone = FALSE;
10097 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10098 if (ent->plt.offset != (bfd_vma) -1)
10099 {
10100 if (!doneone)
10101 {
10102 Elf_Internal_Rela rela;
10103 bfd_byte *loc;
10104 bfd_vma reloc_index;
10105
10106 if (htab->plt_type == PLT_NEW
10107 || !htab->elf.dynamic_sections_created
10108 || h->dynindx == -1)
10109 reloc_index = ent->plt.offset / 4;
10110 else
10111 {
10112 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10113 / htab->plt_slot_size);
10114 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10115 && htab->plt_type == PLT_OLD)
10116 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10117 }
10118
10119 /* This symbol has an entry in the procedure linkage table.
10120 Set it up. */
10121 if (htab->plt_type == PLT_VXWORKS
10122 && htab->elf.dynamic_sections_created
10123 && h->dynindx != -1)
10124 {
10125 bfd_vma got_offset;
10126 const bfd_vma *plt_entry;
10127
10128 /* The first three entries in .got.plt are reserved. */
10129 got_offset = (reloc_index + 3) * 4;
10130
10131 /* Use the right PLT. */
10132 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10133 : ppc_elf_vxworks_plt_entry;
10134
10135 /* Fill in the .plt on VxWorks. */
10136 if (bfd_link_pic (info))
10137 {
10138 bfd_put_32 (output_bfd,
10139 plt_entry[0] | PPC_HA (got_offset),
10140 htab->plt->contents + ent->plt.offset + 0);
10141 bfd_put_32 (output_bfd,
10142 plt_entry[1] | PPC_LO (got_offset),
10143 htab->plt->contents + ent->plt.offset + 4);
10144 }
10145 else
10146 {
10147 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10148
10149 bfd_put_32 (output_bfd,
10150 plt_entry[0] | PPC_HA (got_loc),
10151 htab->plt->contents + ent->plt.offset + 0);
10152 bfd_put_32 (output_bfd,
10153 plt_entry[1] | PPC_LO (got_loc),
10154 htab->plt->contents + ent->plt.offset + 4);
10155 }
10156
10157 bfd_put_32 (output_bfd, plt_entry[2],
10158 htab->plt->contents + ent->plt.offset + 8);
10159 bfd_put_32 (output_bfd, plt_entry[3],
10160 htab->plt->contents + ent->plt.offset + 12);
10161
10162 /* This instruction is an immediate load. The value loaded is
10163 the byte offset of the R_PPC_JMP_SLOT relocation from the
10164 start of the .rela.plt section. The value is stored in the
10165 low-order 16 bits of the load instruction. */
10166 /* NOTE: It appears that this is now an index rather than a
10167 prescaled offset. */
10168 bfd_put_32 (output_bfd,
10169 plt_entry[4] | reloc_index,
10170 htab->plt->contents + ent->plt.offset + 16);
10171 /* This instruction is a PC-relative branch whose target is
10172 the start of the PLT section. The address of this branch
10173 instruction is 20 bytes beyond the start of this PLT entry.
10174 The address is encoded in bits 6-29, inclusive. The value
10175 stored is right-shifted by two bits, permitting a 26-bit
10176 offset. */
10177 bfd_put_32 (output_bfd,
10178 (plt_entry[5]
10179 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10180 htab->plt->contents + ent->plt.offset + 20);
10181 bfd_put_32 (output_bfd, plt_entry[6],
10182 htab->plt->contents + ent->plt.offset + 24);
10183 bfd_put_32 (output_bfd, plt_entry[7],
10184 htab->plt->contents + ent->plt.offset + 28);
10185
10186 /* Fill in the GOT entry corresponding to this PLT slot with
10187 the address immediately after the "bctr" instruction
10188 in this PLT entry. */
10189 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
10190 + htab->plt->output_offset
10191 + ent->plt.offset + 16),
10192 htab->sgotplt->contents + got_offset);
10193
10194 if (!bfd_link_pic (info))
10195 {
10196 /* Fill in a couple of entries in .rela.plt.unloaded. */
10197 loc = htab->srelplt2->contents
10198 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10199 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10200 * sizeof (Elf32_External_Rela));
10201
10202 /* Provide the @ha relocation for the first instruction. */
10203 rela.r_offset = (htab->plt->output_section->vma
10204 + htab->plt->output_offset
10205 + ent->plt.offset + 2);
10206 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10207 R_PPC_ADDR16_HA);
10208 rela.r_addend = got_offset;
10209 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10210 loc += sizeof (Elf32_External_Rela);
10211
10212 /* Provide the @l relocation for the second instruction. */
10213 rela.r_offset = (htab->plt->output_section->vma
10214 + htab->plt->output_offset
10215 + ent->plt.offset + 6);
10216 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10217 R_PPC_ADDR16_LO);
10218 rela.r_addend = got_offset;
10219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10220 loc += sizeof (Elf32_External_Rela);
10221
10222 /* Provide a relocation for the GOT entry corresponding to this
10223 PLT slot. Point it at the middle of the .plt entry. */
10224 rela.r_offset = (htab->sgotplt->output_section->vma
10225 + htab->sgotplt->output_offset
10226 + got_offset);
10227 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10228 R_PPC_ADDR32);
10229 rela.r_addend = ent->plt.offset + 16;
10230 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10231 }
10232
10233 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10234 In particular, the offset for the relocation is not the
10235 address of the PLT entry for this function, as specified
10236 by the ABI. Instead, the offset is set to the address of
10237 the GOT slot for this function. See EABI 4.4.4.1. */
10238 rela.r_offset = (htab->sgotplt->output_section->vma
10239 + htab->sgotplt->output_offset
10240 + got_offset);
10241
10242 }
10243 else
10244 {
10245 asection *splt = htab->plt;
10246 if (!htab->elf.dynamic_sections_created
10247 || h->dynindx == -1)
10248 splt = htab->iplt;
10249
10250 rela.r_offset = (splt->output_section->vma
10251 + splt->output_offset
10252 + ent->plt.offset);
10253 if (htab->plt_type == PLT_OLD
10254 || !htab->elf.dynamic_sections_created
10255 || h->dynindx == -1)
10256 {
10257 /* We don't need to fill in the .plt. The ppc dynamic
10258 linker will fill it in. */
10259 }
10260 else
10261 {
10262 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10263 + htab->glink->output_section->vma
10264 + htab->glink->output_offset);
10265 bfd_put_32 (output_bfd, val,
10266 splt->contents + ent->plt.offset);
10267 }
10268 }
10269
10270 /* Fill in the entry in the .rela.plt section. */
10271 rela.r_addend = 0;
10272 if (!htab->elf.dynamic_sections_created
10273 || h->dynindx == -1)
10274 {
10275 BFD_ASSERT (h->type == STT_GNU_IFUNC
10276 && h->def_regular
10277 && (h->root.type == bfd_link_hash_defined
10278 || h->root.type == bfd_link_hash_defweak));
10279 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10280 rela.r_addend = SYM_VAL (h);
10281 }
10282 else
10283 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10284
10285 if (!htab->elf.dynamic_sections_created
10286 || h->dynindx == -1)
10287 loc = (htab->reliplt->contents
10288 + (htab->reliplt->reloc_count++
10289 * sizeof (Elf32_External_Rela)));
10290 else
10291 loc = (htab->relplt->contents
10292 + reloc_index * sizeof (Elf32_External_Rela));
10293 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10294
10295 if (!h->def_regular)
10296 {
10297 /* Mark the symbol as undefined, rather than as
10298 defined in the .plt section. Leave the value if
10299 there were any relocations where pointer equality
10300 matters (this is a clue for the dynamic linker, to
10301 make function pointer comparisons work between an
10302 application and shared library), otherwise set it
10303 to zero. */
10304 sym->st_shndx = SHN_UNDEF;
10305 if (!h->pointer_equality_needed)
10306 sym->st_value = 0;
10307 else if (!h->ref_regular_nonweak)
10308 {
10309 /* This breaks function pointer comparisons, but
10310 that is better than breaking tests for a NULL
10311 function pointer. */
10312 sym->st_value = 0;
10313 }
10314 }
10315 else if (h->type == STT_GNU_IFUNC
10316 && !bfd_link_pic (info))
10317 {
10318 /* Set the value of ifunc symbols in a non-pie
10319 executable to the glink entry. This is to avoid
10320 text relocations. We can't do this for ifunc in
10321 allocate_dynrelocs, as we do for normal dynamic
10322 function symbols with plt entries, because we need
10323 to keep the original value around for the ifunc
10324 relocation. */
10325 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10326 (output_bfd, htab->glink->output_section));
10327 sym->st_value = (ent->glink_offset
10328 + htab->glink->output_offset
10329 + htab->glink->output_section->vma);
10330 }
10331 doneone = TRUE;
10332 }
10333
10334 if (htab->plt_type == PLT_NEW
10335 || !htab->elf.dynamic_sections_created
10336 || h->dynindx == -1)
10337 {
10338 unsigned char *p;
10339 asection *splt = htab->plt;
10340 if (!htab->elf.dynamic_sections_created
10341 || h->dynindx == -1)
10342 splt = htab->iplt;
10343
10344 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10345
10346 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10347 {
10348 bfd_put_32 (output_bfd, LWZ_11_3, p);
10349 p += 4;
10350 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10351 p += 4;
10352 bfd_put_32 (output_bfd, MR_0_3, p);
10353 p += 4;
10354 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10355 p += 4;
10356 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10357 p += 4;
10358 bfd_put_32 (output_bfd, BEQLR, p);
10359 p += 4;
10360 bfd_put_32 (output_bfd, MR_3_0, p);
10361 p += 4;
10362 bfd_put_32 (output_bfd, NOP, p);
10363 p += 4;
10364 }
10365
10366 write_glink_stub (ent, splt, p, info);
10367
10368 if (!bfd_link_pic (info))
10369 /* We only need one non-PIC glink stub. */
10370 break;
10371 }
10372 else
10373 break;
10374 }
10375
10376 if (h->needs_copy)
10377 {
10378 asection *s;
10379 Elf_Internal_Rela rela;
10380 bfd_byte *loc;
10381
10382 /* This symbols needs a copy reloc. Set it up. */
10383
10384 #ifdef DEBUG
10385 fprintf (stderr, ", copy");
10386 #endif
10387
10388 BFD_ASSERT (h->dynindx != -1);
10389
10390 if (ppc_elf_hash_entry (h)->has_sda_refs)
10391 s = htab->relsbss;
10392 else
10393 s = htab->relbss;
10394 BFD_ASSERT (s != NULL);
10395
10396 rela.r_offset = SYM_VAL (h);
10397 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10398 rela.r_addend = 0;
10399 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10400 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10401 }
10402
10403 #ifdef DEBUG
10404 fprintf (stderr, "\n");
10405 #endif
10406
10407 return TRUE;
10408 }
10409 \f
10410 static enum elf_reloc_type_class
10411 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10412 const asection *rel_sec,
10413 const Elf_Internal_Rela *rela)
10414 {
10415 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10416
10417 if (rel_sec == htab->reliplt)
10418 return reloc_class_ifunc;
10419
10420 switch (ELF32_R_TYPE (rela->r_info))
10421 {
10422 case R_PPC_RELATIVE:
10423 return reloc_class_relative;
10424 case R_PPC_JMP_SLOT:
10425 return reloc_class_plt;
10426 case R_PPC_COPY:
10427 return reloc_class_copy;
10428 default:
10429 return reloc_class_normal;
10430 }
10431 }
10432 \f
10433 /* Finish up the dynamic sections. */
10434
10435 static bfd_boolean
10436 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10437 struct bfd_link_info *info)
10438 {
10439 asection *sdyn;
10440 asection *splt;
10441 struct ppc_elf_link_hash_table *htab;
10442 bfd_vma got;
10443 bfd *dynobj;
10444 bfd_boolean ret = TRUE;
10445
10446 #ifdef DEBUG
10447 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10448 #endif
10449
10450 htab = ppc_elf_hash_table (info);
10451 dynobj = elf_hash_table (info)->dynobj;
10452 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10453 if (htab->is_vxworks)
10454 splt = bfd_get_linker_section (dynobj, ".plt");
10455 else
10456 splt = NULL;
10457
10458 got = 0;
10459 if (htab->elf.hgot != NULL)
10460 got = SYM_VAL (htab->elf.hgot);
10461
10462 if (htab->elf.dynamic_sections_created)
10463 {
10464 Elf32_External_Dyn *dyncon, *dynconend;
10465
10466 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10467
10468 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10469 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10470 for (; dyncon < dynconend; dyncon++)
10471 {
10472 Elf_Internal_Dyn dyn;
10473 asection *s;
10474
10475 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10476
10477 switch (dyn.d_tag)
10478 {
10479 case DT_PLTGOT:
10480 if (htab->is_vxworks)
10481 s = htab->sgotplt;
10482 else
10483 s = htab->plt;
10484 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10485 break;
10486
10487 case DT_PLTRELSZ:
10488 dyn.d_un.d_val = htab->relplt->size;
10489 break;
10490
10491 case DT_JMPREL:
10492 s = htab->relplt;
10493 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10494 break;
10495
10496 case DT_PPC_GOT:
10497 dyn.d_un.d_ptr = got;
10498 break;
10499
10500 case DT_RELASZ:
10501 if (htab->is_vxworks)
10502 {
10503 if (htab->relplt)
10504 dyn.d_un.d_ptr -= htab->relplt->size;
10505 break;
10506 }
10507 continue;
10508
10509 default:
10510 if (htab->is_vxworks
10511 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10512 break;
10513 continue;
10514 }
10515
10516 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10517 }
10518 }
10519
10520 if (htab->got != NULL)
10521 {
10522 if (htab->elf.hgot->root.u.def.section == htab->got
10523 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10524 {
10525 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10526
10527 p += htab->elf.hgot->root.u.def.value;
10528 if (htab->plt_type == PLT_OLD)
10529 {
10530 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10531 so that a function can easily find the address of
10532 _GLOBAL_OFFSET_TABLE_. */
10533 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10534 < htab->elf.hgot->root.u.def.section->size);
10535 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10536 }
10537
10538 if (sdyn != NULL)
10539 {
10540 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10541 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10542 < htab->elf.hgot->root.u.def.section->size);
10543 bfd_put_32 (output_bfd, val, p);
10544 }
10545 }
10546 else
10547 {
10548 /* xgettext:c-format */
10549 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10550 htab->elf.hgot->root.root.string,
10551 (htab->sgotplt != NULL
10552 ? htab->sgotplt->name : htab->got->name));
10553 bfd_set_error (bfd_error_bad_value);
10554 ret = FALSE;
10555 }
10556
10557 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10558 }
10559
10560 /* Fill in the first entry in the VxWorks procedure linkage table. */
10561 if (splt && splt->size > 0)
10562 {
10563 /* Use the right PLT. */
10564 const bfd_vma *plt_entry = (bfd_link_pic (info)
10565 ? ppc_elf_vxworks_pic_plt0_entry
10566 : ppc_elf_vxworks_plt0_entry);
10567
10568 if (!bfd_link_pic (info))
10569 {
10570 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10571
10572 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10573 splt->contents + 0);
10574 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10575 splt->contents + 4);
10576 }
10577 else
10578 {
10579 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10580 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10581 }
10582 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10583 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10584 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10585 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10586 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10587 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10588
10589 if (! bfd_link_pic (info))
10590 {
10591 Elf_Internal_Rela rela;
10592 bfd_byte *loc;
10593
10594 loc = htab->srelplt2->contents;
10595
10596 /* Output the @ha relocation for the first instruction. */
10597 rela.r_offset = (htab->plt->output_section->vma
10598 + htab->plt->output_offset
10599 + 2);
10600 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10601 rela.r_addend = 0;
10602 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10603 loc += sizeof (Elf32_External_Rela);
10604
10605 /* Output the @l relocation for the second instruction. */
10606 rela.r_offset = (htab->plt->output_section->vma
10607 + htab->plt->output_offset
10608 + 6);
10609 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10610 rela.r_addend = 0;
10611 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10612 loc += sizeof (Elf32_External_Rela);
10613
10614 /* Fix up the remaining relocations. They may have the wrong
10615 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10616 in which symbols were output. */
10617 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10618 {
10619 Elf_Internal_Rela rel;
10620
10621 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10622 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10623 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10624 loc += sizeof (Elf32_External_Rela);
10625
10626 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10627 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10628 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10629 loc += sizeof (Elf32_External_Rela);
10630
10631 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10632 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10633 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10634 loc += sizeof (Elf32_External_Rela);
10635 }
10636 }
10637 }
10638
10639 if (htab->glink != NULL
10640 && htab->glink->contents != NULL
10641 && htab->elf.dynamic_sections_created)
10642 {
10643 unsigned char *p;
10644 unsigned char *endp;
10645 bfd_vma res0;
10646 unsigned int i;
10647
10648 /*
10649 * PIC glink code is the following:
10650 *
10651 * # ith PLT code stub.
10652 * addis 11,30,(plt+(i-1)*4-got)@ha
10653 * lwz 11,(plt+(i-1)*4-got)@l(11)
10654 * mtctr 11
10655 * bctr
10656 *
10657 * # A table of branches, one for each plt entry.
10658 * # The idea is that the plt call stub loads ctr and r11 with these
10659 * # addresses, so (r11 - res_0) gives the plt index * 4.
10660 * res_0: b PLTresolve
10661 * res_1: b PLTresolve
10662 * .
10663 * # Some number of entries towards the end can be nops
10664 * res_n_m3: nop
10665 * res_n_m2: nop
10666 * res_n_m1:
10667 *
10668 * PLTresolve:
10669 * addis 11,11,(1f-res_0)@ha
10670 * mflr 0
10671 * bcl 20,31,1f
10672 * 1: addi 11,11,(1b-res_0)@l
10673 * mflr 12
10674 * mtlr 0
10675 * sub 11,11,12 # r11 = index * 4
10676 * addis 12,12,(got+4-1b)@ha
10677 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10678 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10679 * mtctr 0
10680 * add 0,11,11
10681 * add 11,0,11 # r11 = index * 12 = reloc offset.
10682 * bctr
10683 */
10684 static const unsigned int pic_plt_resolve[] =
10685 {
10686 ADDIS_11_11,
10687 MFLR_0,
10688 BCL_20_31,
10689 ADDI_11_11,
10690 MFLR_12,
10691 MTLR_0,
10692 SUB_11_11_12,
10693 ADDIS_12_12,
10694 LWZ_0_12,
10695 LWZ_12_12,
10696 MTCTR_0,
10697 ADD_0_11_11,
10698 ADD_11_0_11,
10699 BCTR,
10700 NOP,
10701 NOP
10702 };
10703
10704 /*
10705 * Non-PIC glink code is a little simpler.
10706 *
10707 * # ith PLT code stub.
10708 * lis 11,(plt+(i-1)*4)@ha
10709 * lwz 11,(plt+(i-1)*4)@l(11)
10710 * mtctr 11
10711 * bctr
10712 *
10713 * The branch table is the same, then comes
10714 *
10715 * PLTresolve:
10716 * lis 12,(got+4)@ha
10717 * addis 11,11,(-res_0)@ha
10718 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10719 * addi 11,11,(-res_0)@l # r11 = index * 4
10720 * mtctr 0
10721 * add 0,11,11
10722 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10723 * add 11,0,11 # r11 = index * 12 = reloc offset.
10724 * bctr
10725 */
10726 static const unsigned int plt_resolve[] =
10727 {
10728 LIS_12,
10729 ADDIS_11_11,
10730 LWZ_0_12,
10731 ADDI_11_11,
10732 MTCTR_0,
10733 ADD_0_11_11,
10734 LWZ_12_12,
10735 ADD_11_0_11,
10736 BCTR,
10737 NOP,
10738 NOP,
10739 NOP,
10740 NOP,
10741 NOP,
10742 NOP,
10743 NOP
10744 };
10745
10746 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10747 abort ();
10748 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10749 abort ();
10750
10751 /* Build the branch table, one for each plt entry (less one),
10752 and perhaps some padding. */
10753 p = htab->glink->contents;
10754 p += htab->glink_pltresolve;
10755 endp = htab->glink->contents;
10756 endp += htab->glink->size - GLINK_PLTRESOLVE;
10757 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10758 {
10759 bfd_put_32 (output_bfd, B + endp - p, p);
10760 p += 4;
10761 }
10762 while (p < endp)
10763 {
10764 bfd_put_32 (output_bfd, NOP, p);
10765 p += 4;
10766 }
10767
10768 res0 = (htab->glink_pltresolve
10769 + htab->glink->output_section->vma
10770 + htab->glink->output_offset);
10771
10772 if (htab->params->ppc476_workaround)
10773 {
10774 /* Ensure that a call stub at the end of a page doesn't
10775 result in prefetch over the end of the page into the
10776 glink branch table. */
10777 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10778 bfd_vma page_addr;
10779 bfd_vma glink_start = (htab->glink->output_section->vma
10780 + htab->glink->output_offset);
10781
10782 for (page_addr = res0 & -pagesize;
10783 page_addr > glink_start;
10784 page_addr -= pagesize)
10785 {
10786 /* We have a plt call stub that may need fixing. */
10787 bfd_byte *loc;
10788 unsigned int insn;
10789
10790 loc = htab->glink->contents + page_addr - 4 - glink_start;
10791 insn = bfd_get_32 (output_bfd, loc);
10792 if (insn == BCTR)
10793 {
10794 /* By alignment, we know that there must be at least
10795 one other call stub before this one. */
10796 insn = bfd_get_32 (output_bfd, loc - 16);
10797 if (insn == BCTR)
10798 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10799 else
10800 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10801 }
10802 }
10803 }
10804
10805 /* Last comes the PLTresolve stub. */
10806 if (bfd_link_pic (info))
10807 {
10808 bfd_vma bcl;
10809
10810 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10811 {
10812 unsigned int insn = pic_plt_resolve[i];
10813
10814 if (htab->params->ppc476_workaround && insn == NOP)
10815 insn = BA + 0;
10816 bfd_put_32 (output_bfd, insn, p);
10817 p += 4;
10818 }
10819 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10820
10821 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10822 + htab->glink->output_section->vma
10823 + htab->glink->output_offset);
10824
10825 bfd_put_32 (output_bfd,
10826 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10827 bfd_put_32 (output_bfd,
10828 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10829 bfd_put_32 (output_bfd,
10830 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10831 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10832 {
10833 bfd_put_32 (output_bfd,
10834 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10835 bfd_put_32 (output_bfd,
10836 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10837 }
10838 else
10839 {
10840 bfd_put_32 (output_bfd,
10841 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10842 bfd_put_32 (output_bfd,
10843 LWZ_12_12 + 4, p + 9*4);
10844 }
10845 }
10846 else
10847 {
10848 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10849 {
10850 unsigned int insn = plt_resolve[i];
10851
10852 if (htab->params->ppc476_workaround && insn == NOP)
10853 insn = BA + 0;
10854 bfd_put_32 (output_bfd, insn, p);
10855 p += 4;
10856 }
10857 p -= 4 * ARRAY_SIZE (plt_resolve);
10858
10859 bfd_put_32 (output_bfd,
10860 LIS_12 + PPC_HA (got + 4), p + 0*4);
10861 bfd_put_32 (output_bfd,
10862 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10863 bfd_put_32 (output_bfd,
10864 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10865 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10866 {
10867 bfd_put_32 (output_bfd,
10868 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10869 bfd_put_32 (output_bfd,
10870 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10871 }
10872 else
10873 {
10874 bfd_put_32 (output_bfd,
10875 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10876 bfd_put_32 (output_bfd,
10877 LWZ_12_12 + 4, p + 6*4);
10878 }
10879 }
10880 }
10881
10882 if (htab->glink_eh_frame != NULL
10883 && htab->glink_eh_frame->contents != NULL)
10884 {
10885 unsigned char *p = htab->glink_eh_frame->contents;
10886 bfd_vma val;
10887
10888 p += sizeof (glink_eh_frame_cie);
10889 /* FDE length. */
10890 p += 4;
10891 /* CIE pointer. */
10892 p += 4;
10893 /* Offset to .glink. */
10894 val = (htab->glink->output_section->vma
10895 + htab->glink->output_offset);
10896 val -= (htab->glink_eh_frame->output_section->vma
10897 + htab->glink_eh_frame->output_offset);
10898 val -= p - htab->glink_eh_frame->contents;
10899 bfd_put_32 (htab->elf.dynobj, val, p);
10900
10901 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10902 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10903 htab->glink_eh_frame,
10904 htab->glink_eh_frame->contents))
10905 return FALSE;
10906 }
10907
10908 return ret;
10909 }
10910 \f
10911 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10912 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10913 #define TARGET_BIG_SYM powerpc_elf32_vec
10914 #define TARGET_BIG_NAME "elf32-powerpc"
10915 #define ELF_ARCH bfd_arch_powerpc
10916 #define ELF_TARGET_ID PPC32_ELF_DATA
10917 #define ELF_MACHINE_CODE EM_PPC
10918 #ifdef __QNXTARGET__
10919 #define ELF_MAXPAGESIZE 0x1000
10920 #define ELF_COMMONPAGESIZE 0x1000
10921 #else
10922 #define ELF_MAXPAGESIZE 0x10000
10923 #define ELF_COMMONPAGESIZE 0x10000
10924 #endif
10925 #define ELF_MINPAGESIZE 0x1000
10926 #define elf_info_to_howto ppc_elf_info_to_howto
10927
10928 #ifdef EM_CYGNUS_POWERPC
10929 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10930 #endif
10931
10932 #ifdef EM_PPC_OLD
10933 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10934 #endif
10935
10936 #define elf_backend_plt_not_loaded 1
10937 #define elf_backend_can_gc_sections 1
10938 #define elf_backend_can_refcount 1
10939 #define elf_backend_rela_normal 1
10940 #define elf_backend_caches_rawsize 1
10941
10942 #define bfd_elf32_mkobject ppc_elf_mkobject
10943 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10944 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10945 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10946 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10947 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10948 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10949 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10950
10951 #define elf_backend_object_p ppc_elf_object_p
10952 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10953 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10954 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10955 #define elf_backend_relocate_section ppc_elf_relocate_section
10956 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10957 #define elf_backend_check_relocs ppc_elf_check_relocs
10958 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10959 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10960 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10961 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10962 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10963 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10964 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10965 #define elf_backend_fake_sections ppc_elf_fake_sections
10966 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10967 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10968 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10969 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10970 #define elf_backend_write_core_note ppc_elf_write_core_note
10971 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10972 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10973 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10974 #define elf_backend_write_section ppc_elf_write_section
10975 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10976 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10977 #define elf_backend_action_discarded ppc_elf_action_discarded
10978 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10979 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10980
10981 #include "elf32-target.h"
10982
10983 /* FreeBSD Target */
10984
10985 #undef TARGET_LITTLE_SYM
10986 #undef TARGET_LITTLE_NAME
10987
10988 #undef TARGET_BIG_SYM
10989 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10990 #undef TARGET_BIG_NAME
10991 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10992
10993 #undef ELF_OSABI
10994 #define ELF_OSABI ELFOSABI_FREEBSD
10995
10996 #undef elf32_bed
10997 #define elf32_bed elf32_powerpc_fbsd_bed
10998
10999 #include "elf32-target.h"
11000
11001 /* VxWorks Target */
11002
11003 #undef TARGET_LITTLE_SYM
11004 #undef TARGET_LITTLE_NAME
11005
11006 #undef TARGET_BIG_SYM
11007 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11008 #undef TARGET_BIG_NAME
11009 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11010
11011 #undef ELF_OSABI
11012
11013 /* VxWorks uses the elf default section flags for .plt. */
11014 static const struct bfd_elf_special_section *
11015 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
11016 {
11017 if (sec->name == NULL)
11018 return NULL;
11019
11020 if (strcmp (sec->name, ".plt") == 0)
11021 return _bfd_elf_get_sec_type_attr (abfd, sec);
11022
11023 return ppc_elf_get_sec_type_attr (abfd, sec);
11024 }
11025
11026 /* Like ppc_elf_link_hash_table_create, but overrides
11027 appropriately for VxWorks. */
11028 static struct bfd_link_hash_table *
11029 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11030 {
11031 struct bfd_link_hash_table *ret;
11032
11033 ret = ppc_elf_link_hash_table_create (abfd);
11034 if (ret)
11035 {
11036 struct ppc_elf_link_hash_table *htab
11037 = (struct ppc_elf_link_hash_table *)ret;
11038 htab->is_vxworks = 1;
11039 htab->plt_type = PLT_VXWORKS;
11040 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11041 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11042 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11043 }
11044 return ret;
11045 }
11046
11047 /* Tweak magic VxWorks symbols as they are loaded. */
11048 static bfd_boolean
11049 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11050 struct bfd_link_info *info,
11051 Elf_Internal_Sym *sym,
11052 const char **namep ATTRIBUTE_UNUSED,
11053 flagword *flagsp ATTRIBUTE_UNUSED,
11054 asection **secp,
11055 bfd_vma *valp)
11056 {
11057 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
11058 valp))
11059 return FALSE;
11060
11061 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11062 }
11063
11064 static void
11065 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11066 {
11067 ppc_elf_final_write_processing(abfd, linker);
11068 elf_vxworks_final_write_processing(abfd, linker);
11069 }
11070
11071 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11072 define it. */
11073 #undef elf_backend_want_plt_sym
11074 #define elf_backend_want_plt_sym 1
11075 #undef elf_backend_want_got_plt
11076 #define elf_backend_want_got_plt 1
11077 #undef elf_backend_got_symbol_offset
11078 #define elf_backend_got_symbol_offset 0
11079 #undef elf_backend_plt_not_loaded
11080 #define elf_backend_plt_not_loaded 0
11081 #undef elf_backend_plt_readonly
11082 #define elf_backend_plt_readonly 1
11083 #undef elf_backend_got_header_size
11084 #define elf_backend_got_header_size 12
11085
11086 #undef bfd_elf32_get_synthetic_symtab
11087
11088 #undef bfd_elf32_bfd_link_hash_table_create
11089 #define bfd_elf32_bfd_link_hash_table_create \
11090 ppc_elf_vxworks_link_hash_table_create
11091 #undef elf_backend_add_symbol_hook
11092 #define elf_backend_add_symbol_hook \
11093 ppc_elf_vxworks_add_symbol_hook
11094 #undef elf_backend_link_output_symbol_hook
11095 #define elf_backend_link_output_symbol_hook \
11096 elf_vxworks_link_output_symbol_hook
11097 #undef elf_backend_final_write_processing
11098 #define elf_backend_final_write_processing \
11099 ppc_elf_vxworks_final_write_processing
11100 #undef elf_backend_get_sec_type_attr
11101 #define elf_backend_get_sec_type_attr \
11102 ppc_elf_vxworks_get_sec_type_attr
11103 #undef elf_backend_emit_relocs
11104 #define elf_backend_emit_relocs \
11105 elf_vxworks_emit_relocs
11106
11107 #undef elf32_bed
11108 #define elf32_bed ppc_elf_vxworks_bed
11109 #undef elf_backend_post_process_headers
11110
11111 #include "elf32-target.h"
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