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Fix C++ build for Cygwin
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38
39 typedef enum split16_format_type
40 {
41 split16a_type = 0,
42 split16d_type
43 }
44 split16_format_type;
45
46 /* RELA relocations are used here. */
47
48 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53 /* Branch prediction bit for branch taken relocs. */
54 #define BRANCH_PREDICT_BIT 0x200000
55 /* Mask to set RA in memory instructions. */
56 #define RA_REGISTER_MASK 0x001f0000
57 /* Value to shift register by to insert RA. */
58 #define RA_REGISTER_SHIFT 16
59
60 /* The name of the dynamic interpreter. This is put in the .interp
61 section. */
62 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
63
64 /* For old-style PLT. */
65 /* The number of single-slot PLT entries (the rest use two slots). */
66 #define PLT_NUM_SINGLE_ENTRIES 8192
67
68 /* For new-style .glink and .plt. */
69 #define GLINK_PLTRESOLVE 16*4
70 #define GLINK_ENTRY_SIZE 4*4
71 #define TLS_GET_ADDR_GLINK_SIZE 12*4
72
73 /* VxWorks uses its own plt layout, filled in by the static linker. */
74
75 /* The standard VxWorks PLT entry. */
76 #define VXWORKS_PLT_ENTRY_SIZE 32
77 static const bfd_vma ppc_elf_vxworks_plt_entry
78 [VXWORKS_PLT_ENTRY_SIZE / 4] =
79 {
80 0x3d800000, /* lis r12,0 */
81 0x818c0000, /* lwz r12,0(r12) */
82 0x7d8903a6, /* mtctr r12 */
83 0x4e800420, /* bctr */
84 0x39600000, /* li r11,0 */
85 0x48000000, /* b 14 <.PLT0resolve+0x4> */
86 0x60000000, /* nop */
87 0x60000000, /* nop */
88 };
89 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
90 [VXWORKS_PLT_ENTRY_SIZE / 4] =
91 {
92 0x3d9e0000, /* addis r12,r30,0 */
93 0x818c0000, /* lwz r12,0(r12) */
94 0x7d8903a6, /* mtctr r12 */
95 0x4e800420, /* bctr */
96 0x39600000, /* li r11,0 */
97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
98 0x60000000, /* nop */
99 0x60000000, /* nop */
100 };
101
102 /* The initial VxWorks PLT entry. */
103 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
104 static const bfd_vma ppc_elf_vxworks_plt0_entry
105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
106 {
107 0x3d800000, /* lis r12,0 */
108 0x398c0000, /* addi r12,r12,0 */
109 0x800c0008, /* lwz r0,8(r12) */
110 0x7c0903a6, /* mtctr r0 */
111 0x818c0004, /* lwz r12,4(r12) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 };
116 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
118 {
119 0x819e0008, /* lwz r12,8(r30) */
120 0x7d8903a6, /* mtctr r12 */
121 0x819e0004, /* lwz r12,4(r30) */
122 0x4e800420, /* bctr */
123 0x60000000, /* nop */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 };
128
129 /* For executables, we have some additional relocations in
130 .rela.plt.unloaded, for the kernel loader. */
131
132 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
133 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
134 /* The number of relocations in the PLTResolve slot. */
135 #define VXWORKS_PLTRESOLVE_RELOCS 2
136 /* The number of relocations in the PLTResolve slot when when creating
137 a shared library. */
138 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
139
140 /* Some instructions. */
141 #define ADDIS_11_11 0x3d6b0000
142 #define ADDIS_11_30 0x3d7e0000
143 #define ADDIS_12_12 0x3d8c0000
144 #define ADDI_11_11 0x396b0000
145 #define ADD_0_11_11 0x7c0b5a14
146 #define ADD_3_12_2 0x7c6c1214
147 #define ADD_11_0_11 0x7d605a14
148 #define B 0x48000000
149 #define BA 0x48000002
150 #define BCL_20_31 0x429f0005
151 #define BCTR 0x4e800420
152 #define BEQLR 0x4d820020
153 #define CMPWI_11_0 0x2c0b0000
154 #define LIS_11 0x3d600000
155 #define LIS_12 0x3d800000
156 #define LWZU_0_12 0x840c0000
157 #define LWZ_0_12 0x800c0000
158 #define LWZ_11_3 0x81630000
159 #define LWZ_11_11 0x816b0000
160 #define LWZ_11_30 0x817e0000
161 #define LWZ_12_3 0x81830000
162 #define LWZ_12_12 0x818c0000
163 #define MR_0_3 0x7c601b78
164 #define MR_3_0 0x7c030378
165 #define MFLR_0 0x7c0802a6
166 #define MFLR_12 0x7d8802a6
167 #define MTCTR_0 0x7c0903a6
168 #define MTCTR_11 0x7d6903a6
169 #define MTLR_0 0x7c0803a6
170 #define NOP 0x60000000
171 #define SUB_11_11_12 0x7d6c5850
172
173 /* Offset of tp and dtp pointers from start of TLS block. */
174 #define TP_OFFSET 0x7000
175 #define DTP_OFFSET 0x8000
176
177 /* The value of a defined global symbol. */
178 #define SYM_VAL(SYM) \
179 ((SYM)->root.u.def.section->output_section->vma \
180 + (SYM)->root.u.def.section->output_offset \
181 + (SYM)->root.u.def.value)
182 \f
183 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
184
185 static reloc_howto_type ppc_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC_NONE, /* type */
188 0, /* rightshift */
189 3, /* size (0 = byte, 1 = short, 2 = long) */
190 0, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x3fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* The high order 16 bits of an address. */
263 HOWTO (R_PPC_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* The high order 16 bits of an address, plus 1 if the contents of
278 the low 16 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc_elf_addr16_ha_reloc, /* special_function */
287 "R_PPC_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_signed, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xfffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_signed, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_PPC_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xfffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_signed, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_PPC_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0xfffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x3fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0xfffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 bfd_elf_generic_reloc, /* special_function */
384 "R_PPC_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0xfffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xfffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 bfd_elf_generic_reloc, /* special_function */
449 "R_PPC_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc_elf_addr16_ha_reloc, /* special_function */
465 "R_PPC_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC_REL24, but referring to the procedure linkage table
472 entry for the symbol. */
473 HOWTO (R_PPC_PLTREL24, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 26, /* bitsize */
477 TRUE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_signed, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* special_function */
481 "R_PPC_PLTREL24", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0x3fffffc, /* dst_mask */
485 TRUE), /* pcrel_offset */
486
487 /* This is used only by the dynamic linker. The symbol should exist
488 both in the object being run and in some shared library. The
489 dynamic linker copies the data addressed by the symbol from the
490 shared library into the object, because the object being
491 run has to have the data at some particular address. */
492 HOWTO (R_PPC_COPY, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_COPY", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Like R_PPC_ADDR32, but used when setting global offset table
507 entries. */
508 HOWTO (R_PPC_GLOB_DAT, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 32, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_PPC_GLOB_DAT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0xffffffff, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Marks a procedure linkage table entry for a symbol. */
523 HOWTO (R_PPC_JMP_SLOT, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_PPC_JMP_SLOT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Used only by the dynamic linker. When the object is run, this
538 longword is set to the load address of the object, plus the
539 addend. */
540 HOWTO (R_PPC_RELATIVE, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_RELATIVE", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC_REL24, but uses the value of the symbol within the
555 object rather than the final value. Normally used for
556 _GLOBAL_OFFSET_TABLE_. */
557 HOWTO (R_PPC_LOCAL24PC, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 26, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_LOCAL24PC", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0x3fffffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_dont, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative */
602 HOWTO (R_PPC_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_dont, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: not supported. */
634 HOWTO (R_PPC_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 bfd_elf_generic_reloc, /* special_function */
674 "R_PPC_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc_elf_addr16_ha_reloc, /* special_function */
690 "R_PPC_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
697 small data items. */
698 HOWTO (R_PPC_SDAREL16, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_signed, /* complain_on_overflow */
705 bfd_elf_generic_reloc, /* special_function */
706 "R_PPC_SDAREL16", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit section relative relocation. */
713 HOWTO (R_PPC_SECTOFF, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_signed, /* complain_on_overflow */
720 bfd_elf_generic_reloc, /* special_function */
721 "R_PPC_SECTOFF", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit lower half section relative relocation. */
728 HOWTO (R_PPC_SECTOFF_LO, /* type */
729 0, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 bfd_elf_generic_reloc, /* special_function */
736 "R_PPC_SECTOFF_LO", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half section relative relocation. */
743 HOWTO (R_PPC_SECTOFF_HI, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC_SECTOFF_HI", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* 16-bit upper half adjusted section relative relocation. */
758 HOWTO (R_PPC_SECTOFF_HA, /* type */
759 16, /* rightshift */
760 1, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 ppc_elf_addr16_ha_reloc, /* special_function */
766 "R_PPC_SECTOFF_HA", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* Marker relocs for TLS. */
773 HOWTO (R_PPC_TLS,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC_TLS", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 HOWTO (R_PPC_TLSGD,
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 32, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC_TLSGD", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 HOWTO (R_PPC_TLSLD,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_PPC_TLSLD", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes the load module index of the load module that contains the
816 definition of its TLS sym. */
817 HOWTO (R_PPC_DTPMOD32,
818 0, /* rightshift */
819 2, /* size (0 = byte, 1 = short, 2 = long) */
820 32, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 ppc_elf_unhandled_reloc, /* special_function */
825 "R_PPC_DTPMOD32", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffffffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* Computes a dtv-relative displacement, the difference between the value
832 of sym+add and the base address of the thread-local storage block that
833 contains the definition of sym, minus 0x8000. */
834 HOWTO (R_PPC_DTPREL32,
835 0, /* rightshift */
836 2, /* size (0 = byte, 1 = short, 2 = long) */
837 32, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc_elf_unhandled_reloc, /* special_function */
842 "R_PPC_DTPREL32", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffffffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* A 16 bit dtprel reloc. */
849 HOWTO (R_PPC_DTPREL16,
850 0, /* rightshift */
851 1, /* size (0 = byte, 1 = short, 2 = long) */
852 16, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_signed, /* complain_on_overflow */
856 ppc_elf_unhandled_reloc, /* special_function */
857 "R_PPC_DTPREL16", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 0xffff, /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* Like DTPREL16, but no overflow. */
864 HOWTO (R_PPC_DTPREL16_LO,
865 0, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc_elf_unhandled_reloc, /* special_function */
872 "R_PPC_DTPREL16_LO", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like DTPREL16_LO, but next higher group of 16 bits. */
879 HOWTO (R_PPC_DTPREL16_HI,
880 16, /* rightshift */
881 1, /* size (0 = byte, 1 = short, 2 = long) */
882 16, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc_elf_unhandled_reloc, /* special_function */
887 "R_PPC_DTPREL16_HI", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 0xffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* Like DTPREL16_HI, but adjust for low 16 bits. */
894 HOWTO (R_PPC_DTPREL16_HA,
895 16, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_DTPREL16_HA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Computes a tp-relative displacement, the difference between the value of
909 sym+add and the value of the thread pointer (r13). */
910 HOWTO (R_PPC_TPREL32,
911 0, /* rightshift */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
913 32, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_TPREL32", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffffffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* A 16 bit tprel reloc. */
925 HOWTO (R_PPC_TPREL16,
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_signed, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_TPREL16", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* Like TPREL16, but no overflow. */
940 HOWTO (R_PPC_TPREL16_LO,
941 0, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc_elf_unhandled_reloc, /* special_function */
948 "R_PPC_TPREL16_LO", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* Like TPREL16_LO, but next higher group of 16 bits. */
955 HOWTO (R_PPC_TPREL16_HI,
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc_elf_unhandled_reloc, /* special_function */
963 "R_PPC_TPREL16_HI", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like TPREL16_HI, but adjust for low 16 bits. */
970 HOWTO (R_PPC_TPREL16_HA,
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_TPREL16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
985 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
986 to the first entry. */
987 HOWTO (R_PPC_GOT_TLSGD16,
988 0, /* rightshift */
989 1, /* size (0 = byte, 1 = short, 2 = long) */
990 16, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_signed, /* complain_on_overflow */
994 ppc_elf_unhandled_reloc, /* special_function */
995 "R_PPC_GOT_TLSGD16", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 0xffff, /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like GOT_TLSGD16, but no overflow. */
1002 HOWTO (R_PPC_GOT_TLSGD16_LO,
1003 0, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont, /* complain_on_overflow */
1009 ppc_elf_unhandled_reloc, /* special_function */
1010 "R_PPC_GOT_TLSGD16_LO", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1017 HOWTO (R_PPC_GOT_TLSGD16_HI,
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc_elf_unhandled_reloc, /* special_function */
1025 "R_PPC_GOT_TLSGD16_HI", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1032 HOWTO (R_PPC_GOT_TLSGD16_HA,
1033 16, /* rightshift */
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1035 16, /* bitsize */
1036 FALSE, /* pc_relative */
1037 0, /* bitpos */
1038 complain_overflow_dont, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TLSGD16_HA", /* name */
1041 FALSE, /* partial_inplace */
1042 0, /* src_mask */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1045
1046 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1047 with values (sym+add)@dtpmod and zero, and computes the offset to the
1048 first entry. */
1049 HOWTO (R_PPC_GOT_TLSLD16,
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 ppc_elf_unhandled_reloc, /* special_function */
1057 "R_PPC_GOT_TLSLD16", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like GOT_TLSLD16, but no overflow. */
1064 HOWTO (R_PPC_GOT_TLSLD16_LO,
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 ppc_elf_unhandled_reloc, /* special_function */
1072 "R_PPC_GOT_TLSLD16_LO", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1079 HOWTO (R_PPC_GOT_TLSLD16_HI,
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 ppc_elf_unhandled_reloc, /* special_function */
1087 "R_PPC_GOT_TLSLD16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1094 HOWTO (R_PPC_GOT_TLSLD16_HA,
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_dont, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_TLSLD16_HA", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1109 the offset to the entry. */
1110 HOWTO (R_PPC_GOT_DTPREL16,
1111 0, /* rightshift */
1112 1, /* size (0 = byte, 1 = short, 2 = long) */
1113 16, /* bitsize */
1114 FALSE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_signed, /* complain_on_overflow */
1117 ppc_elf_unhandled_reloc, /* special_function */
1118 "R_PPC_GOT_DTPREL16", /* name */
1119 FALSE, /* partial_inplace */
1120 0, /* src_mask */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1123
1124 /* Like GOT_DTPREL16, but no overflow. */
1125 HOWTO (R_PPC_GOT_DTPREL16_LO,
1126 0, /* rightshift */
1127 1, /* size (0 = byte, 1 = short, 2 = long) */
1128 16, /* bitsize */
1129 FALSE, /* pc_relative */
1130 0, /* bitpos */
1131 complain_overflow_dont, /* complain_on_overflow */
1132 ppc_elf_unhandled_reloc, /* special_function */
1133 "R_PPC_GOT_DTPREL16_LO", /* name */
1134 FALSE, /* partial_inplace */
1135 0, /* src_mask */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1138
1139 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1140 HOWTO (R_PPC_GOT_DTPREL16_HI,
1141 16, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc_elf_unhandled_reloc, /* special_function */
1148 "R_PPC_GOT_DTPREL16_HI", /* name */
1149 FALSE, /* partial_inplace */
1150 0, /* src_mask */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1155 HOWTO (R_PPC_GOT_DTPREL16_HA,
1156 16, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_DTPREL16_HA", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1170 offset to the entry. */
1171 HOWTO (R_PPC_GOT_TPREL16,
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc_elf_unhandled_reloc, /* special_function */
1179 "R_PPC_GOT_TPREL16", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xffff, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like GOT_TPREL16, but no overflow. */
1186 HOWTO (R_PPC_GOT_TPREL16_LO,
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc_elf_unhandled_reloc, /* special_function */
1194 "R_PPC_GOT_TPREL16_LO", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xffff, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1201 HOWTO (R_PPC_GOT_TPREL16_HI,
1202 16, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_dont, /* complain_on_overflow */
1208 ppc_elf_unhandled_reloc, /* special_function */
1209 "R_PPC_GOT_TPREL16_HI", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xffff, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1216 HOWTO (R_PPC_GOT_TPREL16_HA,
1217 16, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc_elf_unhandled_reloc, /* special_function */
1224 "R_PPC_GOT_TPREL16_HA", /* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xffff, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* The remaining relocs are from the Embedded ELF ABI, and are not
1231 in the SVR4 ELF ABI. */
1232
1233 /* 32 bit value resulting from the addend minus the symbol. */
1234 HOWTO (R_PPC_EMB_NADDR32, /* type */
1235 0, /* rightshift */
1236 2, /* size (0 = byte, 1 = short, 2 = long) */
1237 32, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 bfd_elf_generic_reloc, /* special_function */
1242 "R_PPC_EMB_NADDR32", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xffffffff, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* 16 bit value resulting from the addend minus the symbol. */
1249 HOWTO (R_PPC_EMB_NADDR16, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_signed, /* complain_on_overflow */
1256 bfd_elf_generic_reloc, /* special_function */
1257 "R_PPC_EMB_NADDR16", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xffff, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* 16 bit value resulting from the addend minus the symbol. */
1264 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont,/* complain_on_overflow */
1271 bfd_elf_generic_reloc, /* special_function */
1272 "R_PPC_EMB_ADDR16_LO", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* The high order 16 bits of the addend minus the symbol. */
1279 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1280 16, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC_EMB_NADDR16_HI", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* The high order 16 bits of the result of the addend minus the address,
1294 plus 1 if the contents of the low 16 bits, treated as a signed number,
1295 is negative. */
1296 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1297 16, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc_elf_addr16_ha_reloc, /* special_function */
1304 "R_PPC_EMB_NADDR16_HA", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* 16 bit value resulting from allocating a 4 byte word to hold an
1311 address in the .sdata section, and returning the offset from
1312 _SDA_BASE_ for that relocation. */
1313 HOWTO (R_PPC_EMB_SDAI16, /* type */
1314 0, /* rightshift */
1315 1, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_PPC_EMB_SDAI16", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* 16 bit value resulting from allocating a 4 byte word to hold an
1328 address in the .sdata2 section, and returning the offset from
1329 _SDA2_BASE_ for that relocation. */
1330 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 bfd_elf_generic_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2I16", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1345 small data items. */
1346 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1347 0, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_signed, /* complain_on_overflow */
1353 bfd_elf_generic_reloc, /* special_function */
1354 "R_PPC_EMB_SDA2REL", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1361 signed offset from the appropriate base, and filling in the register
1362 field with the appropriate register (0, 2, or 13). */
1363 HOWTO (R_PPC_EMB_SDA21, /* type */
1364 0, /* rightshift */
1365 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_signed, /* complain_on_overflow */
1370 bfd_elf_generic_reloc, /* special_function */
1371 "R_PPC_EMB_SDA21", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Relocation not handled: R_PPC_EMB_MRKREF */
1378 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1379 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1380 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1382 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1383
1384 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1385 in the 16 bit signed offset from the appropriate base, and filling in the
1386 register field with the appropriate register (0, 2, or 13). */
1387 HOWTO (R_PPC_EMB_RELSDA, /* type */
1388 0, /* rightshift */
1389 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 16, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_signed, /* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 "R_PPC_EMB_RELSDA", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 0xffff, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* A relative 8 bit branch. */
1402 HOWTO (R_PPC_VLE_REL8, /* type */
1403 1, /* rightshift */
1404 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 8, /* bitsize */
1406 TRUE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_signed, /* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_PPC_VLE_REL8", /* name */
1411 FALSE, /* partial_inplace */
1412 0, /* src_mask */
1413 0xff, /* dst_mask */
1414 TRUE), /* pcrel_offset */
1415
1416 /* A relative 15 bit branch. */
1417 HOWTO (R_PPC_VLE_REL15, /* type */
1418 1, /* rightshift */
1419 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 15, /* bitsize */
1421 TRUE, /* pc_relative */
1422 1, /* bitpos */
1423 complain_overflow_signed, /* complain_on_overflow */
1424 bfd_elf_generic_reloc, /* special_function */
1425 "R_PPC_VLE_REL15", /* name */
1426 FALSE, /* partial_inplace */
1427 0, /* src_mask */
1428 0xfe, /* dst_mask */
1429 TRUE), /* pcrel_offset */
1430
1431 /* A relative 24 bit branch. */
1432 HOWTO (R_PPC_VLE_REL24, /* type */
1433 1, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 24, /* bitsize */
1436 TRUE, /* pc_relative */
1437 1, /* bitpos */
1438 complain_overflow_signed, /* complain_on_overflow */
1439 bfd_elf_generic_reloc, /* special_function */
1440 "R_PPC_VLE_REL24", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0x1fffffe, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* The 16 LSBS in split16a format. */
1447 HOWTO (R_PPC_VLE_LO16A, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 bfd_elf_generic_reloc, /* special_function */
1455 "R_PPC_VLE_LO16A", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0x1f007ff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* The 16 LSBS in split16d format. */
1462 HOWTO (R_PPC_VLE_LO16D, /* type */
1463 0, /* rightshift */
1464 2, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 bfd_elf_generic_reloc, /* special_function */
1470 "R_PPC_VLE_LO16D", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0x1f07ff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Bits 16-31 split16a format. */
1477 HOWTO (R_PPC_VLE_HI16A, /* type */
1478 16, /* rightshift */
1479 2, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 bfd_elf_generic_reloc, /* special_function */
1485 "R_PPC_VLE_HI16A", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0x1f007ff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Bits 16-31 split16d format. */
1492 HOWTO (R_PPC_VLE_HI16D, /* type */
1493 16, /* rightshift */
1494 2, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 bfd_elf_generic_reloc, /* special_function */
1500 "R_PPC_VLE_HI16D", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0x1f07ff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Bits 16-31 (High Adjusted) in split16a format. */
1507 HOWTO (R_PPC_VLE_HA16A, /* type */
1508 16, /* rightshift */
1509 2, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 bfd_elf_generic_reloc, /* special_function */
1515 "R_PPC_VLE_HA16A", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0x1f007ff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Bits 16-31 (High Adjusted) in split16d format. */
1522 HOWTO (R_PPC_VLE_HA16D, /* type */
1523 16, /* rightshift */
1524 2, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 bfd_elf_generic_reloc, /* special_function */
1530 "R_PPC_VLE_HA16D", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0x1f07ff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1537 instructions. If the register base is 0 then the linker changes
1538 the e_add16i to an e_li instruction. */
1539 HOWTO (R_PPC_VLE_SDA21, /* type */
1540 0, /* rightshift */
1541 2, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 bfd_elf_generic_reloc, /* special_function */
1547 "R_PPC_VLE_SDA21", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1554 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1555 0, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 bfd_elf_generic_reloc, /* special_function */
1562 "R_PPC_VLE_SDA21_LO", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1569 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1570 0, /* rightshift */
1571 2, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_dont, /* complain_on_overflow */
1576 bfd_elf_generic_reloc, /* special_function */
1577 "R_PPC_VLE_SDAREL_LO16A", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0x1f007ff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1584 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 bfd_elf_generic_reloc, /* special_function */
1592 "R_PPC_VLE_SDAREL_LO16D", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0x1f07ff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1599 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1600 16, /* rightshift */
1601 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 bfd_elf_generic_reloc, /* special_function */
1607 "R_PPC_VLE_SDAREL_HI16A", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0x1f007ff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1614 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1615 16, /* rightshift */
1616 2, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 bfd_elf_generic_reloc, /* special_function */
1622 "R_PPC_VLE_SDAREL_HI16D", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0x1f07ff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1629 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1630 16, /* rightshift */
1631 2, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 bfd_elf_generic_reloc, /* special_function */
1637 "R_PPC_VLE_SDAREL_HA16A", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0x1f007ff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1644 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1645 16, /* rightshift */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 bfd_elf_generic_reloc, /* special_function */
1652 "R_PPC_VLE_SDAREL_HA16D", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0x1f07ff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 HOWTO (R_PPC_IRELATIVE, /* type */
1659 0, /* rightshift */
1660 2, /* size (0 = byte, 1 = short, 2 = long) */
1661 32, /* bitsize */
1662 FALSE, /* pc_relative */
1663 0, /* bitpos */
1664 complain_overflow_dont, /* complain_on_overflow */
1665 bfd_elf_generic_reloc, /* special_function */
1666 "R_PPC_IRELATIVE", /* name */
1667 FALSE, /* partial_inplace */
1668 0, /* src_mask */
1669 0xffffffff, /* dst_mask */
1670 FALSE), /* pcrel_offset */
1671
1672 /* A 16 bit relative relocation. */
1673 HOWTO (R_PPC_REL16, /* type */
1674 0, /* rightshift */
1675 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 16, /* bitsize */
1677 TRUE, /* pc_relative */
1678 0, /* bitpos */
1679 complain_overflow_signed, /* complain_on_overflow */
1680 bfd_elf_generic_reloc, /* special_function */
1681 "R_PPC_REL16", /* name */
1682 FALSE, /* partial_inplace */
1683 0, /* src_mask */
1684 0xffff, /* dst_mask */
1685 TRUE), /* pcrel_offset */
1686
1687 /* A 16 bit relative relocation without overflow. */
1688 HOWTO (R_PPC_REL16_LO, /* type */
1689 0, /* rightshift */
1690 1, /* size (0 = byte, 1 = short, 2 = long) */
1691 16, /* bitsize */
1692 TRUE, /* pc_relative */
1693 0, /* bitpos */
1694 complain_overflow_dont,/* complain_on_overflow */
1695 bfd_elf_generic_reloc, /* special_function */
1696 "R_PPC_REL16_LO", /* name */
1697 FALSE, /* partial_inplace */
1698 0, /* src_mask */
1699 0xffff, /* dst_mask */
1700 TRUE), /* pcrel_offset */
1701
1702 /* The high order 16 bits of a relative address. */
1703 HOWTO (R_PPC_REL16_HI, /* type */
1704 16, /* rightshift */
1705 1, /* size (0 = byte, 1 = short, 2 = long) */
1706 16, /* bitsize */
1707 TRUE, /* pc_relative */
1708 0, /* bitpos */
1709 complain_overflow_dont, /* complain_on_overflow */
1710 bfd_elf_generic_reloc, /* special_function */
1711 "R_PPC_REL16_HI", /* name */
1712 FALSE, /* partial_inplace */
1713 0, /* src_mask */
1714 0xffff, /* dst_mask */
1715 TRUE), /* pcrel_offset */
1716
1717 /* The high order 16 bits of a relative address, plus 1 if the contents of
1718 the low 16 bits, treated as a signed number, is negative. */
1719 HOWTO (R_PPC_REL16_HA, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc_elf_addr16_ha_reloc, /* special_function */
1727 "R_PPC_REL16_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1734 HOWTO (R_PPC_REL16DX_HA, /* type */
1735 16, /* rightshift */
1736 2, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 TRUE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc_elf_addr16_ha_reloc, /* special_function */
1742 "R_PPC_REL16DX_HA", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0x1fffc1, /* dst_mask */
1746 TRUE), /* pcrel_offset */
1747
1748 /* GNU extension to record C++ vtable hierarchy. */
1749 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1750 0, /* rightshift */
1751 0, /* size (0 = byte, 1 = short, 2 = long) */
1752 0, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_dont, /* complain_on_overflow */
1756 NULL, /* special_function */
1757 "R_PPC_GNU_VTINHERIT", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* GNU extension to record C++ vtable member usage. */
1764 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1765 0, /* rightshift */
1766 0, /* size (0 = byte, 1 = short, 2 = long) */
1767 0, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 NULL, /* special_function */
1772 "R_PPC_GNU_VTENTRY", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Phony reloc to handle AIX style TOC entries. */
1779 HOWTO (R_PPC_TOC16, /* type */
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 bfd_elf_generic_reloc, /* special_function */
1787 "R_PPC_TOC16", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792 };
1793
1794 /* External 32-bit PPC structure for PRPSINFO. This structure is
1795 ABI-defined, thus we choose to use char arrays here in order to
1796 avoid dealing with different types in different architectures.
1797
1798 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1799 most non-PPC architectures use `short int'.
1800
1801 This structure will ultimately be written in the corefile's note
1802 section, as the PRPSINFO. */
1803
1804 struct elf_external_ppc_linux_prpsinfo32
1805 {
1806 char pr_state; /* Numeric process state. */
1807 char pr_sname; /* Char for pr_state. */
1808 char pr_zomb; /* Zombie. */
1809 char pr_nice; /* Nice val. */
1810 char pr_flag[4]; /* Flags. */
1811 char pr_uid[4];
1812 char pr_gid[4];
1813 char pr_pid[4];
1814 char pr_ppid[4];
1815 char pr_pgrp[4];
1816 char pr_sid[4];
1817 char pr_fname[16]; /* Filename of executable. */
1818 char pr_psargs[80]; /* Initial part of arg list. */
1819 };
1820
1821 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1822 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1823
1824 static inline void
1825 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1826 const struct elf_internal_linux_prpsinfo *from,
1827 struct elf_external_ppc_linux_prpsinfo32 *to)
1828 {
1829 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1830 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1831 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1832 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1833 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1834 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1835 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1836 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1837 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1838 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1839 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1840 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1841 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1842 }
1843 \f
1844 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1845
1846 static void
1847 ppc_elf_howto_init (void)
1848 {
1849 unsigned int i, type;
1850
1851 for (i = 0;
1852 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1853 i++)
1854 {
1855 type = ppc_elf_howto_raw[i].type;
1856 if (type >= (sizeof (ppc_elf_howto_table)
1857 / sizeof (ppc_elf_howto_table[0])))
1858 abort ();
1859 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1860 }
1861 }
1862
1863 static reloc_howto_type *
1864 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1865 bfd_reloc_code_real_type code)
1866 {
1867 enum elf_ppc_reloc_type r;
1868
1869 /* Initialize howto table if not already done. */
1870 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1871 ppc_elf_howto_init ();
1872
1873 switch (code)
1874 {
1875 default:
1876 return NULL;
1877
1878 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1879 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1880 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1881 case BFD_RELOC_PPC64_ADDR16_DS:
1882 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1883 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1884 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1885 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1886 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1887 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1888 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1889 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1890 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1891 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1892 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1893 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1894 case BFD_RELOC_PPC64_GOT16_DS:
1895 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1896 case BFD_RELOC_PPC64_GOT16_LO_DS:
1897 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1898 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1899 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1900 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1901 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1902 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1903 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1904 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1905 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1906 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1907 case BFD_RELOC_PPC64_PLT16_LO_DS:
1908 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1909 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1910 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1911 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1912 case BFD_RELOC_PPC64_SECTOFF_DS:
1913 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1914 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1915 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1916 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1917 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1918 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1919 case BFD_RELOC_PPC64_TOC16_DS:
1920 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1921 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1922 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1923 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1924 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1925 case BFD_RELOC_PPC64_TPREL16_DS:
1926 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1927 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1928 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1929 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1930 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1931 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1932 case BFD_RELOC_PPC64_DTPREL16_DS:
1933 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1934 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1935 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1936 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1937 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1938 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1939 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1943 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1947 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1951 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1955 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1956 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1960 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1961 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1963 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1964 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1965 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1966 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1967 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1969 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1970 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1971 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1972 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1973 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1974 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1975 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1976 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1977 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1978 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1979 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1980 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1981 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1983 r = R_PPC_VLE_SDAREL_LO16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1986 r = R_PPC_VLE_SDAREL_LO16D;
1987 break;
1988 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1989 r = R_PPC_VLE_SDAREL_HI16A;
1990 break;
1991 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1992 r = R_PPC_VLE_SDAREL_HI16D;
1993 break;
1994 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1995 r = R_PPC_VLE_SDAREL_HA16A;
1996 break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1998 r = R_PPC_VLE_SDAREL_HA16D;
1999 break;
2000 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2001 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2002 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2003 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2004 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2005 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2006 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2007 }
2008
2009 return ppc_elf_howto_table[r];
2010 };
2011
2012 static reloc_howto_type *
2013 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2014 const char *r_name)
2015 {
2016 unsigned int i;
2017
2018 for (i = 0;
2019 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2020 i++)
2021 if (ppc_elf_howto_raw[i].name != NULL
2022 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2023 return &ppc_elf_howto_raw[i];
2024
2025 return NULL;
2026 }
2027
2028 /* Set the howto pointer for a PowerPC ELF reloc. */
2029
2030 static void
2031 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2032 arelent *cache_ptr,
2033 Elf_Internal_Rela *dst)
2034 {
2035 unsigned int r_type;
2036
2037 /* Initialize howto table if not already done. */
2038 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2039 ppc_elf_howto_init ();
2040
2041 r_type = ELF32_R_TYPE (dst->r_info);
2042 if (r_type >= R_PPC_max)
2043 {
2044 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2045 abfd, r_type);
2046 bfd_set_error (bfd_error_bad_value);
2047 r_type = R_PPC_NONE;
2048 }
2049 cache_ptr->howto = ppc_elf_howto_table[r_type];
2050
2051 /* Just because the above assert didn't trigger doesn't mean that
2052 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2053 if (!cache_ptr->howto)
2054 {
2055 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2056 abfd, r_type);
2057 bfd_set_error (bfd_error_bad_value);
2058
2059 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2060 }
2061 }
2062
2063 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2064
2065 static bfd_reloc_status_type
2066 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2067 arelent *reloc_entry,
2068 asymbol *symbol,
2069 void *data ATTRIBUTE_UNUSED,
2070 asection *input_section,
2071 bfd *output_bfd,
2072 char **error_message ATTRIBUTE_UNUSED)
2073 {
2074 enum elf_ppc_reloc_type r_type;
2075 long insn;
2076 bfd_size_type octets;
2077 bfd_vma value;
2078
2079 if (output_bfd != NULL)
2080 {
2081 reloc_entry->address += input_section->output_offset;
2082 return bfd_reloc_ok;
2083 }
2084
2085 reloc_entry->addend += 0x8000;
2086 r_type = reloc_entry->howto->type;
2087 if (r_type != R_PPC_REL16DX_HA)
2088 return bfd_reloc_continue;
2089
2090 value = 0;
2091 if (!bfd_is_com_section (symbol->section))
2092 value = symbol->value;
2093 value += (reloc_entry->addend
2094 + symbol->section->output_offset
2095 + symbol->section->output_section->vma);
2096 value -= (reloc_entry->address
2097 + input_section->output_offset
2098 + input_section->output_section->vma);
2099 value >>= 16;
2100
2101 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2102 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2103 insn &= ~0x1fffc1;
2104 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2105 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2106 return bfd_reloc_ok;
2107 }
2108
2109 static bfd_reloc_status_type
2110 ppc_elf_unhandled_reloc (bfd *abfd,
2111 arelent *reloc_entry,
2112 asymbol *symbol,
2113 void *data,
2114 asection *input_section,
2115 bfd *output_bfd,
2116 char **error_message)
2117 {
2118 /* If this is a relocatable link (output_bfd test tells us), just
2119 call the generic function. Any adjustment will be done at final
2120 link time. */
2121 if (output_bfd != NULL)
2122 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2123 input_section, output_bfd, error_message);
2124
2125 if (error_message != NULL)
2126 {
2127 static char buf[60];
2128 sprintf (buf, _("generic linker can't handle %s"),
2129 reloc_entry->howto->name);
2130 *error_message = buf;
2131 }
2132 return bfd_reloc_dangerous;
2133 }
2134 \f
2135 /* Sections created by the linker. */
2136
2137 typedef struct elf_linker_section
2138 {
2139 /* Pointer to the bfd section. */
2140 asection *section;
2141 /* Section name. */
2142 const char *name;
2143 /* Associated bss section name. */
2144 const char *bss_name;
2145 /* Associated symbol name. */
2146 const char *sym_name;
2147 /* Associated symbol. */
2148 struct elf_link_hash_entry *sym;
2149 } elf_linker_section_t;
2150
2151 /* Linked list of allocated pointer entries. This hangs off of the
2152 symbol lists, and provides allows us to return different pointers,
2153 based on different addend's. */
2154
2155 typedef struct elf_linker_section_pointers
2156 {
2157 /* next allocated pointer for this symbol */
2158 struct elf_linker_section_pointers *next;
2159 /* offset of pointer from beginning of section */
2160 bfd_vma offset;
2161 /* addend used */
2162 bfd_vma addend;
2163 /* which linker section this is */
2164 elf_linker_section_t *lsect;
2165 } elf_linker_section_pointers_t;
2166
2167 struct ppc_elf_obj_tdata
2168 {
2169 struct elf_obj_tdata elf;
2170
2171 /* A mapping from local symbols to offsets into the various linker
2172 sections added. This is index by the symbol index. */
2173 elf_linker_section_pointers_t **linker_section_pointers;
2174
2175 /* Flags used to auto-detect plt type. */
2176 unsigned int makes_plt_call : 1;
2177 unsigned int has_rel16 : 1;
2178 };
2179
2180 #define ppc_elf_tdata(bfd) \
2181 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2182
2183 #define elf_local_ptr_offsets(bfd) \
2184 (ppc_elf_tdata (bfd)->linker_section_pointers)
2185
2186 #define is_ppc_elf(bfd) \
2187 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2188 && elf_object_id (bfd) == PPC32_ELF_DATA)
2189
2190 /* Override the generic function because we store some extras. */
2191
2192 static bfd_boolean
2193 ppc_elf_mkobject (bfd *abfd)
2194 {
2195 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2196 PPC32_ELF_DATA);
2197 }
2198
2199 /* Fix bad default arch selected for a 32 bit input bfd when the
2200 default is 64 bit. */
2201
2202 static bfd_boolean
2203 ppc_elf_object_p (bfd *abfd)
2204 {
2205 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2206 {
2207 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2208
2209 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2210 {
2211 /* Relies on arch after 64 bit default being 32 bit default. */
2212 abfd->arch_info = abfd->arch_info->next;
2213 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2214 }
2215 }
2216 return TRUE;
2217 }
2218
2219 /* Function to set whether a module needs the -mrelocatable bit set. */
2220
2221 static bfd_boolean
2222 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2223 {
2224 BFD_ASSERT (!elf_flags_init (abfd)
2225 || elf_elfheader (abfd)->e_flags == flags);
2226
2227 elf_elfheader (abfd)->e_flags = flags;
2228 elf_flags_init (abfd) = TRUE;
2229 return TRUE;
2230 }
2231
2232 /* Support for core dump NOTE sections. */
2233
2234 static bfd_boolean
2235 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2236 {
2237 int offset;
2238 unsigned int size;
2239
2240 switch (note->descsz)
2241 {
2242 default:
2243 return FALSE;
2244
2245 case 268: /* Linux/PPC. */
2246 /* pr_cursig */
2247 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2248
2249 /* pr_pid */
2250 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2251
2252 /* pr_reg */
2253 offset = 72;
2254 size = 192;
2255
2256 break;
2257 }
2258
2259 /* Make a ".reg/999" section. */
2260 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2261 size, note->descpos + offset);
2262 }
2263
2264 static bfd_boolean
2265 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2266 {
2267 switch (note->descsz)
2268 {
2269 default:
2270 return FALSE;
2271
2272 case 128: /* Linux/PPC elf_prpsinfo. */
2273 elf_tdata (abfd)->core->pid
2274 = bfd_get_32 (abfd, note->descdata + 16);
2275 elf_tdata (abfd)->core->program
2276 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2277 elf_tdata (abfd)->core->command
2278 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2279 }
2280
2281 /* Note that for some reason, a spurious space is tacked
2282 onto the end of the args in some (at least one anyway)
2283 implementations, so strip it off if it exists. */
2284
2285 {
2286 char *command = elf_tdata (abfd)->core->command;
2287 int n = strlen (command);
2288
2289 if (0 < n && command[n - 1] == ' ')
2290 command[n - 1] = '\0';
2291 }
2292
2293 return TRUE;
2294 }
2295
2296 char *
2297 elfcore_write_ppc_linux_prpsinfo32
2298 (bfd *abfd,
2299 char *buf,
2300 int *bufsiz,
2301 const struct elf_internal_linux_prpsinfo *prpsinfo)
2302 {
2303 struct elf_external_ppc_linux_prpsinfo32 data;
2304
2305 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2306 return elfcore_write_note (abfd, buf, bufsiz,
2307 "CORE", NT_PRPSINFO, &data, sizeof (data));
2308 }
2309
2310 static char *
2311 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2312 {
2313 switch (note_type)
2314 {
2315 default:
2316 return NULL;
2317
2318 case NT_PRPSINFO:
2319 {
2320 char data[128];
2321 va_list ap;
2322
2323 va_start (ap, note_type);
2324 memset (data, 0, sizeof (data));
2325 strncpy (data + 32, va_arg (ap, const char *), 16);
2326 strncpy (data + 48, va_arg (ap, const char *), 80);
2327 va_end (ap);
2328 return elfcore_write_note (abfd, buf, bufsiz,
2329 "CORE", note_type, data, sizeof (data));
2330 }
2331
2332 case NT_PRSTATUS:
2333 {
2334 char data[268];
2335 va_list ap;
2336 long pid;
2337 int cursig;
2338 const void *greg;
2339
2340 va_start (ap, note_type);
2341 memset (data, 0, 72);
2342 pid = va_arg (ap, long);
2343 bfd_put_32 (abfd, pid, data + 24);
2344 cursig = va_arg (ap, int);
2345 bfd_put_16 (abfd, cursig, data + 12);
2346 greg = va_arg (ap, const void *);
2347 memcpy (data + 72, greg, 192);
2348 memset (data + 264, 0, 4);
2349 va_end (ap);
2350 return elfcore_write_note (abfd, buf, bufsiz,
2351 "CORE", note_type, data, sizeof (data));
2352 }
2353 }
2354 }
2355
2356 static flagword
2357 ppc_elf_lookup_section_flags (char *flag_name)
2358 {
2359
2360 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2361 return SHF_PPC_VLE;
2362
2363 return 0;
2364 }
2365
2366 /* Add the VLE flag if required. */
2367
2368 bfd_boolean
2369 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2370 {
2371 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2372 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2373 shdr->sh_flags |= SHF_PPC_VLE;
2374
2375 return TRUE;
2376 }
2377
2378 /* Return address for Ith PLT stub in section PLT, for relocation REL
2379 or (bfd_vma) -1 if it should not be included. */
2380
2381 static bfd_vma
2382 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2383 const asection *plt ATTRIBUTE_UNUSED,
2384 const arelent *rel)
2385 {
2386 return rel->address;
2387 }
2388
2389 /* Handle a PowerPC specific section when reading an object file. This
2390 is called when bfd_section_from_shdr finds a section with an unknown
2391 type. */
2392
2393 static bfd_boolean
2394 ppc_elf_section_from_shdr (bfd *abfd,
2395 Elf_Internal_Shdr *hdr,
2396 const char *name,
2397 int shindex)
2398 {
2399 asection *newsect;
2400 flagword flags;
2401
2402 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2403 return FALSE;
2404
2405 newsect = hdr->bfd_section;
2406 flags = bfd_get_section_flags (abfd, newsect);
2407 if (hdr->sh_flags & SHF_EXCLUDE)
2408 flags |= SEC_EXCLUDE;
2409
2410 if (hdr->sh_type == SHT_ORDERED)
2411 flags |= SEC_SORT_ENTRIES;
2412
2413 bfd_set_section_flags (abfd, newsect, flags);
2414 return TRUE;
2415 }
2416
2417 /* Set up any other section flags and such that may be necessary. */
2418
2419 static bfd_boolean
2420 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2421 Elf_Internal_Shdr *shdr,
2422 asection *asect)
2423 {
2424 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2425 shdr->sh_type = SHT_ORDERED;
2426
2427 return TRUE;
2428 }
2429
2430 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2431 need to bump up the number of section headers. */
2432
2433 static int
2434 ppc_elf_additional_program_headers (bfd *abfd,
2435 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2436 {
2437 asection *s;
2438 int ret = 0;
2439
2440 s = bfd_get_section_by_name (abfd, ".sbss2");
2441 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2442 ++ret;
2443
2444 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2445 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2446 ++ret;
2447
2448 return ret;
2449 }
2450
2451 /* Modify the segment map for VLE executables. */
2452
2453 bfd_boolean
2454 ppc_elf_modify_segment_map (bfd *abfd,
2455 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2456 {
2457 struct elf_segment_map *m, *n;
2458 bfd_size_type amt;
2459 unsigned int j, k;
2460 bfd_boolean sect0_vle, sectj_vle;
2461
2462 /* At this point in the link, output sections have already been sorted by
2463 LMA and assigned to segments. All that is left to do is to ensure
2464 there is no mixing of VLE & non-VLE sections in a text segment.
2465 If we find that case, we split the segment.
2466 We maintain the original output section order. */
2467
2468 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2469 {
2470 if (m->count == 0)
2471 continue;
2472
2473 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2474 for (j = 1; j < m->count; ++j)
2475 {
2476 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2477
2478 if (sectj_vle != sect0_vle)
2479 break;
2480 }
2481 if (j >= m->count)
2482 continue;
2483
2484 /* sections 0..j-1 stay in this (current) segment,
2485 the remainder are put in a new segment.
2486 The scan resumes with the new segment. */
2487
2488 /* Fix the new segment. */
2489 amt = sizeof (struct elf_segment_map);
2490 amt += (m->count - j - 1) * sizeof (asection *);
2491 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2492 if (n == NULL)
2493 return FALSE;
2494
2495 n->p_type = PT_LOAD;
2496 n->p_flags = PF_X | PF_R;
2497 if (sectj_vle)
2498 n->p_flags |= PF_PPC_VLE;
2499 n->count = m->count - j;
2500 for (k = 0; k < n->count; ++k)
2501 {
2502 n->sections[k] = m->sections[j+k];
2503 m->sections[j+k] = NULL;
2504 }
2505 n->next = m->next;
2506 m->next = n;
2507
2508 /* Fix the current segment */
2509 m->count = j;
2510 }
2511
2512 return TRUE;
2513 }
2514
2515 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2516 .PPC.EMB.sbss0 a normal section, and not a bss section so
2517 that the linker doesn't crater when trying to make more than
2518 2 sections. */
2519
2520 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2521 {
2522 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2523 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2524 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2525 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2526 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2527 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2528 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2529 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2530 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2531 { NULL, 0, 0, 0, 0 }
2532 };
2533
2534 /* This is what we want for new plt/got. */
2535 static struct bfd_elf_special_section ppc_alt_plt =
2536 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2537
2538 static const struct bfd_elf_special_section *
2539 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2540 {
2541 const struct bfd_elf_special_section *ssect;
2542
2543 /* See if this is one of the special sections. */
2544 if (sec->name == NULL)
2545 return NULL;
2546
2547 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2548 sec->use_rela_p);
2549 if (ssect != NULL)
2550 {
2551 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2552 ssect = &ppc_alt_plt;
2553 return ssect;
2554 }
2555
2556 return _bfd_elf_get_sec_type_attr (abfd, sec);
2557 }
2558 \f
2559 /* Very simple linked list structure for recording apuinfo values. */
2560 typedef struct apuinfo_list
2561 {
2562 struct apuinfo_list *next;
2563 unsigned long value;
2564 }
2565 apuinfo_list;
2566
2567 static apuinfo_list *head;
2568 static bfd_boolean apuinfo_set;
2569
2570 static void
2571 apuinfo_list_init (void)
2572 {
2573 head = NULL;
2574 apuinfo_set = FALSE;
2575 }
2576
2577 static void
2578 apuinfo_list_add (unsigned long value)
2579 {
2580 apuinfo_list *entry = head;
2581
2582 while (entry != NULL)
2583 {
2584 if (entry->value == value)
2585 return;
2586 entry = entry->next;
2587 }
2588
2589 entry = bfd_malloc (sizeof (* entry));
2590 if (entry == NULL)
2591 return;
2592
2593 entry->value = value;
2594 entry->next = head;
2595 head = entry;
2596 }
2597
2598 static unsigned
2599 apuinfo_list_length (void)
2600 {
2601 apuinfo_list *entry;
2602 unsigned long count;
2603
2604 for (entry = head, count = 0;
2605 entry;
2606 entry = entry->next)
2607 ++ count;
2608
2609 return count;
2610 }
2611
2612 static inline unsigned long
2613 apuinfo_list_element (unsigned long number)
2614 {
2615 apuinfo_list * entry;
2616
2617 for (entry = head;
2618 entry && number --;
2619 entry = entry->next)
2620 ;
2621
2622 return entry ? entry->value : 0;
2623 }
2624
2625 static void
2626 apuinfo_list_finish (void)
2627 {
2628 apuinfo_list *entry;
2629
2630 for (entry = head; entry;)
2631 {
2632 apuinfo_list *next = entry->next;
2633 free (entry);
2634 entry = next;
2635 }
2636
2637 head = NULL;
2638 }
2639
2640 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2641 #define APUINFO_LABEL "APUinfo"
2642
2643 /* Scan the input BFDs and create a linked list of
2644 the APUinfo values that will need to be emitted. */
2645
2646 static void
2647 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2648 {
2649 bfd *ibfd;
2650 asection *asec;
2651 char *buffer = NULL;
2652 bfd_size_type largest_input_size = 0;
2653 unsigned i;
2654 unsigned long length;
2655 const char *error_message = NULL;
2656
2657 if (link_info == NULL)
2658 return;
2659
2660 apuinfo_list_init ();
2661
2662 /* Read in the input sections contents. */
2663 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2664 {
2665 unsigned long datum;
2666
2667 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2668 if (asec == NULL)
2669 continue;
2670
2671 error_message = _("corrupt %s section in %B");
2672 length = asec->size;
2673 if (length < 20)
2674 goto fail;
2675
2676 apuinfo_set = TRUE;
2677 if (largest_input_size < asec->size)
2678 {
2679 if (buffer)
2680 free (buffer);
2681 largest_input_size = asec->size;
2682 buffer = bfd_malloc (largest_input_size);
2683 if (!buffer)
2684 return;
2685 }
2686
2687 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2688 || (bfd_bread (buffer, length, ibfd) != length))
2689 {
2690 error_message = _("unable to read in %s section from %B");
2691 goto fail;
2692 }
2693
2694 /* Verify the contents of the header. Note - we have to
2695 extract the values this way in order to allow for a
2696 host whose endian-ness is different from the target. */
2697 datum = bfd_get_32 (ibfd, buffer);
2698 if (datum != sizeof APUINFO_LABEL)
2699 goto fail;
2700
2701 datum = bfd_get_32 (ibfd, buffer + 8);
2702 if (datum != 0x2)
2703 goto fail;
2704
2705 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2706 goto fail;
2707
2708 /* Get the number of bytes used for apuinfo entries. */
2709 datum = bfd_get_32 (ibfd, buffer + 4);
2710 if (datum + 20 != length)
2711 goto fail;
2712
2713 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2714 for (i = 0; i < datum; i += 4)
2715 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2716 }
2717
2718 error_message = NULL;
2719
2720 if (apuinfo_set)
2721 {
2722 /* Compute the size of the output section. */
2723 unsigned num_entries = apuinfo_list_length ();
2724
2725 /* Set the output section size, if it exists. */
2726 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2727
2728 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2729 {
2730 ibfd = abfd;
2731 error_message = _("warning: unable to set size of %s section in %B");
2732 }
2733 }
2734
2735 fail:
2736 if (buffer)
2737 free (buffer);
2738
2739 if (error_message)
2740 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2741 }
2742
2743 /* Prevent the output section from accumulating the input sections'
2744 contents. We have already stored this in our linked list structure. */
2745
2746 static bfd_boolean
2747 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2748 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2749 asection *asec,
2750 bfd_byte *contents ATTRIBUTE_UNUSED)
2751 {
2752 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2753 }
2754
2755 /* Finally we can generate the output section. */
2756
2757 static void
2758 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2759 {
2760 bfd_byte *buffer;
2761 asection *asec;
2762 unsigned i;
2763 unsigned num_entries;
2764 bfd_size_type length;
2765
2766 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2767 if (asec == NULL)
2768 return;
2769
2770 if (!apuinfo_set)
2771 return;
2772
2773 length = asec->size;
2774 if (length < 20)
2775 return;
2776
2777 buffer = bfd_malloc (length);
2778 if (buffer == NULL)
2779 {
2780 (*_bfd_error_handler)
2781 (_("failed to allocate space for new APUinfo section."));
2782 return;
2783 }
2784
2785 /* Create the apuinfo header. */
2786 num_entries = apuinfo_list_length ();
2787 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2788 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2789 bfd_put_32 (abfd, 0x2, buffer + 8);
2790 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2791
2792 length = 20;
2793 for (i = 0; i < num_entries; i++)
2794 {
2795 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2796 length += 4;
2797 }
2798
2799 if (length != asec->size)
2800 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2801
2802 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2803 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2804
2805 free (buffer);
2806
2807 apuinfo_list_finish ();
2808 }
2809 \f
2810 static bfd_boolean
2811 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2812 {
2813 bfd_byte buf[GLINK_ENTRY_SIZE];
2814
2815 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2816 return FALSE;
2817
2818 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2819 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2820 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2821 && bfd_get_32 (abfd, buf + 12) == BCTR);
2822 }
2823
2824 static bfd_boolean
2825 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2826 {
2827 bfd_vma vma = *(bfd_vma *) ptr;
2828 return ((section->flags & SEC_ALLOC) != 0
2829 && section->vma <= vma
2830 && vma < section->vma + section->size);
2831 }
2832
2833 static long
2834 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2835 long dynsymcount, asymbol **dynsyms,
2836 asymbol **ret)
2837 {
2838 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2839 asection *plt, *relplt, *dynamic, *glink;
2840 bfd_vma glink_vma = 0;
2841 bfd_vma resolv_vma = 0;
2842 bfd_vma stub_vma;
2843 asymbol *s;
2844 arelent *p;
2845 long count, i;
2846 size_t size;
2847 char *names;
2848 bfd_byte buf[4];
2849
2850 *ret = NULL;
2851
2852 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2853 return 0;
2854
2855 if (dynsymcount <= 0)
2856 return 0;
2857
2858 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2859 if (relplt == NULL)
2860 return 0;
2861
2862 plt = bfd_get_section_by_name (abfd, ".plt");
2863 if (plt == NULL)
2864 return 0;
2865
2866 /* Call common code to handle old-style executable PLTs. */
2867 if (elf_section_flags (plt) & SHF_EXECINSTR)
2868 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2869 dynsymcount, dynsyms, ret);
2870
2871 /* If this object was prelinked, the prelinker stored the address
2872 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2873 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2874 if (dynamic != NULL)
2875 {
2876 bfd_byte *dynbuf, *extdyn, *extdynend;
2877 size_t extdynsize;
2878 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2879
2880 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2881 return -1;
2882
2883 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2884 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2885
2886 extdyn = dynbuf;
2887 extdynend = extdyn + dynamic->size;
2888 for (; extdyn < extdynend; extdyn += extdynsize)
2889 {
2890 Elf_Internal_Dyn dyn;
2891 (*swap_dyn_in) (abfd, extdyn, &dyn);
2892
2893 if (dyn.d_tag == DT_NULL)
2894 break;
2895
2896 if (dyn.d_tag == DT_PPC_GOT)
2897 {
2898 unsigned int g_o_t = dyn.d_un.d_val;
2899 asection *got = bfd_get_section_by_name (abfd, ".got");
2900 if (got != NULL
2901 && bfd_get_section_contents (abfd, got, buf,
2902 g_o_t - got->vma + 4, 4))
2903 glink_vma = bfd_get_32 (abfd, buf);
2904 break;
2905 }
2906 }
2907 free (dynbuf);
2908 }
2909
2910 /* Otherwise we read the first plt entry. */
2911 if (glink_vma == 0)
2912 {
2913 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2914 glink_vma = bfd_get_32 (abfd, buf);
2915 }
2916
2917 if (glink_vma == 0)
2918 return 0;
2919
2920 /* The .glink section usually does not survive the final
2921 link; search for the section (usually .text) where the
2922 glink stubs now reside. */
2923 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2924 if (glink == NULL)
2925 return 0;
2926
2927 /* Determine glink PLT resolver by reading the relative branch
2928 from the first glink stub. */
2929 if (bfd_get_section_contents (abfd, glink, buf,
2930 glink_vma - glink->vma, 4))
2931 {
2932 unsigned int insn = bfd_get_32 (abfd, buf);
2933
2934 /* The first glink stub may either branch to the resolver ... */
2935 insn ^= B;
2936 if ((insn & ~0x3fffffc) == 0)
2937 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2938
2939 /* ... or fall through a bunch of NOPs. */
2940 else if ((insn ^ B ^ NOP) == 0)
2941 for (i = 4;
2942 bfd_get_section_contents (abfd, glink, buf,
2943 glink_vma - glink->vma + i, 4);
2944 i += 4)
2945 if (bfd_get_32 (abfd, buf) != NOP)
2946 {
2947 resolv_vma = glink_vma + i;
2948 break;
2949 }
2950 }
2951
2952 count = relplt->size / sizeof (Elf32_External_Rela);
2953 /* If the stubs are those for -shared/-pie then we might have
2954 multiple stubs for each plt entry. If that is the case then
2955 there is no way to associate stubs with their plt entries short
2956 of figuring out the GOT pointer value used in the stub. */
2957 if (!is_nonpic_glink_stub (abfd, glink,
2958 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2959 return 0;
2960
2961 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2962 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2963 return -1;
2964
2965 size = count * sizeof (asymbol);
2966 p = relplt->relocation;
2967 for (i = 0; i < count; i++, p++)
2968 {
2969 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2970 if (p->addend != 0)
2971 size += sizeof ("+0x") - 1 + 8;
2972 }
2973
2974 size += sizeof (asymbol) + sizeof ("__glink");
2975
2976 if (resolv_vma)
2977 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2978
2979 s = *ret = bfd_malloc (size);
2980 if (s == NULL)
2981 return -1;
2982
2983 stub_vma = glink_vma;
2984 names = (char *) (s + count + 1 + (resolv_vma != 0));
2985 p = relplt->relocation + count - 1;
2986 for (i = 0; i < count; i++)
2987 {
2988 size_t len;
2989
2990 *s = **p->sym_ptr_ptr;
2991 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2992 we are defining a symbol, ensure one of them is set. */
2993 if ((s->flags & BSF_LOCAL) == 0)
2994 s->flags |= BSF_GLOBAL;
2995 s->flags |= BSF_SYNTHETIC;
2996 s->section = glink;
2997 stub_vma -= 16;
2998 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
2999 stub_vma -= 32;
3000 s->value = stub_vma - glink->vma;
3001 s->name = names;
3002 s->udata.p = NULL;
3003 len = strlen ((*p->sym_ptr_ptr)->name);
3004 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3005 names += len;
3006 if (p->addend != 0)
3007 {
3008 memcpy (names, "+0x", sizeof ("+0x") - 1);
3009 names += sizeof ("+0x") - 1;
3010 bfd_sprintf_vma (abfd, names, p->addend);
3011 names += strlen (names);
3012 }
3013 memcpy (names, "@plt", sizeof ("@plt"));
3014 names += sizeof ("@plt");
3015 ++s;
3016 --p;
3017 }
3018
3019 /* Add a symbol at the start of the glink branch table. */
3020 memset (s, 0, sizeof *s);
3021 s->the_bfd = abfd;
3022 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3023 s->section = glink;
3024 s->value = glink_vma - glink->vma;
3025 s->name = names;
3026 memcpy (names, "__glink", sizeof ("__glink"));
3027 names += sizeof ("__glink");
3028 s++;
3029 count++;
3030
3031 if (resolv_vma)
3032 {
3033 /* Add a symbol for the glink PLT resolver. */
3034 memset (s, 0, sizeof *s);
3035 s->the_bfd = abfd;
3036 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3037 s->section = glink;
3038 s->value = resolv_vma - glink->vma;
3039 s->name = names;
3040 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3041 names += sizeof ("__glink_PLTresolve");
3042 s++;
3043 count++;
3044 }
3045
3046 return count;
3047 }
3048 \f
3049 /* The following functions are specific to the ELF linker, while
3050 functions above are used generally. They appear in this file more
3051 or less in the order in which they are called. eg.
3052 ppc_elf_check_relocs is called early in the link process,
3053 ppc_elf_finish_dynamic_sections is one of the last functions
3054 called. */
3055
3056 /* Track PLT entries needed for a given symbol. We might need more
3057 than one glink entry per symbol when generating a pic binary. */
3058 struct plt_entry
3059 {
3060 struct plt_entry *next;
3061
3062 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3063 This field stores the offset into .got2 used to initialise the
3064 GOT pointer reg. It will always be at least 32768. (Current
3065 gcc always uses an offset of 32768, but ld -r will pack .got2
3066 sections together resulting in larger offsets). */
3067 bfd_vma addend;
3068
3069 /* The .got2 section. */
3070 asection *sec;
3071
3072 /* PLT refcount or offset. */
3073 union
3074 {
3075 bfd_signed_vma refcount;
3076 bfd_vma offset;
3077 } plt;
3078
3079 /* .glink stub offset. */
3080 bfd_vma glink_offset;
3081 };
3082
3083 /* Of those relocs that might be copied as dynamic relocs, this function
3084 selects those that must be copied when linking a shared library,
3085 even when the symbol is local. */
3086
3087 static int
3088 must_be_dyn_reloc (struct bfd_link_info *info,
3089 enum elf_ppc_reloc_type r_type)
3090 {
3091 switch (r_type)
3092 {
3093 default:
3094 return 1;
3095
3096 case R_PPC_REL24:
3097 case R_PPC_REL14:
3098 case R_PPC_REL14_BRTAKEN:
3099 case R_PPC_REL14_BRNTAKEN:
3100 case R_PPC_REL32:
3101 return 0;
3102
3103 case R_PPC_TPREL32:
3104 case R_PPC_TPREL16:
3105 case R_PPC_TPREL16_LO:
3106 case R_PPC_TPREL16_HI:
3107 case R_PPC_TPREL16_HA:
3108 return !bfd_link_executable (info);
3109 }
3110 }
3111
3112 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3113 copying dynamic variables from a shared lib into an app's dynbss
3114 section, and instead use a dynamic relocation to point into the
3115 shared lib. */
3116 #define ELIMINATE_COPY_RELOCS 1
3117
3118 /* Used to track dynamic relocations for local symbols. */
3119 struct ppc_dyn_relocs
3120 {
3121 struct ppc_dyn_relocs *next;
3122
3123 /* The input section of the reloc. */
3124 asection *sec;
3125
3126 /* Total number of relocs copied for the input section. */
3127 unsigned int count : 31;
3128
3129 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3130 unsigned int ifunc : 1;
3131 };
3132
3133 /* PPC ELF linker hash entry. */
3134
3135 struct ppc_elf_link_hash_entry
3136 {
3137 struct elf_link_hash_entry elf;
3138
3139 /* If this symbol is used in the linker created sections, the processor
3140 specific backend uses this field to map the field into the offset
3141 from the beginning of the section. */
3142 elf_linker_section_pointers_t *linker_section_pointer;
3143
3144 /* Track dynamic relocs copied for this symbol. */
3145 struct elf_dyn_relocs *dyn_relocs;
3146
3147 /* Contexts in which symbol is used in the GOT (or TOC).
3148 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3149 corresponding relocs are encountered during check_relocs.
3150 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3151 indicate the corresponding GOT entry type is not needed. */
3152 #define TLS_GD 1 /* GD reloc. */
3153 #define TLS_LD 2 /* LD reloc. */
3154 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3155 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3156 #define TLS_TLS 16 /* Any TLS reloc. */
3157 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3158 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3159 char tls_mask;
3160
3161 /* Nonzero if we have seen a small data relocation referring to this
3162 symbol. */
3163 unsigned char has_sda_refs : 1;
3164
3165 /* Flag use of given relocations. */
3166 unsigned char has_addr16_ha : 1;
3167 unsigned char has_addr16_lo : 1;
3168 };
3169
3170 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3171
3172 /* PPC ELF linker hash table. */
3173
3174 struct ppc_elf_link_hash_table
3175 {
3176 struct elf_link_hash_table elf;
3177
3178 /* Various options passed from the linker. */
3179 struct ppc_elf_params *params;
3180
3181 /* Short-cuts to get to dynamic linker sections. */
3182 asection *got;
3183 asection *relgot;
3184 asection *glink;
3185 asection *plt;
3186 asection *relplt;
3187 asection *iplt;
3188 asection *reliplt;
3189 asection *dynbss;
3190 asection *relbss;
3191 asection *dynsbss;
3192 asection *relsbss;
3193 elf_linker_section_t sdata[2];
3194 asection *sbss;
3195 asection *glink_eh_frame;
3196
3197 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3198 asection *srelplt2;
3199
3200 /* The .got.plt section (VxWorks only)*/
3201 asection *sgotplt;
3202
3203 /* Shortcut to __tls_get_addr. */
3204 struct elf_link_hash_entry *tls_get_addr;
3205
3206 /* The bfd that forced an old-style PLT. */
3207 bfd *old_bfd;
3208
3209 /* TLS local dynamic got entry handling. */
3210 union {
3211 bfd_signed_vma refcount;
3212 bfd_vma offset;
3213 } tlsld_got;
3214
3215 /* Offset of branch table to PltResolve function in glink. */
3216 bfd_vma glink_pltresolve;
3217
3218 /* Size of reserved GOT entries. */
3219 unsigned int got_header_size;
3220 /* Non-zero if allocating the header left a gap. */
3221 unsigned int got_gap;
3222
3223 /* The type of PLT we have chosen to use. */
3224 enum ppc_elf_plt_type plt_type;
3225
3226 /* True if the target system is VxWorks. */
3227 unsigned int is_vxworks:1;
3228
3229 /* The size of PLT entries. */
3230 int plt_entry_size;
3231 /* The distance between adjacent PLT slots. */
3232 int plt_slot_size;
3233 /* The size of the first PLT entry. */
3234 int plt_initial_entry_size;
3235
3236 /* Small local sym cache. */
3237 struct sym_cache sym_cache;
3238 };
3239
3240 /* Rename some of the generic section flags to better document how they
3241 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3242
3243 /* Nonzero if this section has TLS related relocations. */
3244 #define has_tls_reloc sec_flg0
3245
3246 /* Nonzero if this section has a call to __tls_get_addr. */
3247 #define has_tls_get_addr_call sec_flg1
3248
3249 /* Get the PPC ELF linker hash table from a link_info structure. */
3250
3251 #define ppc_elf_hash_table(p) \
3252 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3253 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3254
3255 /* Create an entry in a PPC ELF linker hash table. */
3256
3257 static struct bfd_hash_entry *
3258 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3259 struct bfd_hash_table *table,
3260 const char *string)
3261 {
3262 /* Allocate the structure if it has not already been allocated by a
3263 subclass. */
3264 if (entry == NULL)
3265 {
3266 entry = bfd_hash_allocate (table,
3267 sizeof (struct ppc_elf_link_hash_entry));
3268 if (entry == NULL)
3269 return entry;
3270 }
3271
3272 /* Call the allocation method of the superclass. */
3273 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3274 if (entry != NULL)
3275 {
3276 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3277 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3278 ppc_elf_hash_entry (entry)->tls_mask = 0;
3279 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3280 }
3281
3282 return entry;
3283 }
3284
3285 /* Create a PPC ELF linker hash table. */
3286
3287 static struct bfd_link_hash_table *
3288 ppc_elf_link_hash_table_create (bfd *abfd)
3289 {
3290 struct ppc_elf_link_hash_table *ret;
3291 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12, 0 };
3292
3293 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3294 if (ret == NULL)
3295 return NULL;
3296
3297 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3298 ppc_elf_link_hash_newfunc,
3299 sizeof (struct ppc_elf_link_hash_entry),
3300 PPC32_ELF_DATA))
3301 {
3302 free (ret);
3303 return NULL;
3304 }
3305
3306 ret->elf.init_plt_refcount.refcount = 0;
3307 ret->elf.init_plt_refcount.glist = NULL;
3308 ret->elf.init_plt_offset.offset = 0;
3309 ret->elf.init_plt_offset.glist = NULL;
3310
3311 ret->params = &default_params;
3312
3313 ret->sdata[0].name = ".sdata";
3314 ret->sdata[0].sym_name = "_SDA_BASE_";
3315 ret->sdata[0].bss_name = ".sbss";
3316
3317 ret->sdata[1].name = ".sdata2";
3318 ret->sdata[1].sym_name = "_SDA2_BASE_";
3319 ret->sdata[1].bss_name = ".sbss2";
3320
3321 ret->plt_entry_size = 12;
3322 ret->plt_slot_size = 8;
3323 ret->plt_initial_entry_size = 72;
3324
3325 return &ret->elf.root;
3326 }
3327
3328 /* Hook linker params into hash table. */
3329
3330 void
3331 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3332 {
3333 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3334
3335 if (htab)
3336 htab->params = params;
3337 }
3338
3339 /* Create .got and the related sections. */
3340
3341 static bfd_boolean
3342 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3343 {
3344 struct ppc_elf_link_hash_table *htab;
3345 asection *s;
3346 flagword flags;
3347
3348 if (!_bfd_elf_create_got_section (abfd, info))
3349 return FALSE;
3350
3351 htab = ppc_elf_hash_table (info);
3352 htab->got = s = bfd_get_linker_section (abfd, ".got");
3353 if (s == NULL)
3354 abort ();
3355
3356 if (htab->is_vxworks)
3357 {
3358 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3359 if (!htab->sgotplt)
3360 abort ();
3361 }
3362 else
3363 {
3364 /* The powerpc .got has a blrl instruction in it. Mark it
3365 executable. */
3366 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3367 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3368 if (!bfd_set_section_flags (abfd, s, flags))
3369 return FALSE;
3370 }
3371
3372 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3373 if (!htab->relgot)
3374 abort ();
3375
3376 return TRUE;
3377 }
3378
3379 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3380 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3381 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3382
3383 static bfd_boolean
3384 ppc_elf_create_linker_section (bfd *abfd,
3385 struct bfd_link_info *info,
3386 flagword flags,
3387 elf_linker_section_t *lsect)
3388 {
3389 asection *s;
3390
3391 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3392 | SEC_LINKER_CREATED);
3393
3394 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3395 if (s == NULL)
3396 return FALSE;
3397 lsect->section = s;
3398
3399 /* Define the sym on the first section of this name. */
3400 s = bfd_get_section_by_name (abfd, lsect->name);
3401
3402 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3403 if (lsect->sym == NULL)
3404 return FALSE;
3405 lsect->sym->root.u.def.value = 0x8000;
3406 return TRUE;
3407 }
3408
3409 static bfd_boolean
3410 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3411 {
3412 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3413 asection *s;
3414 flagword flags;
3415
3416 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3417 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3418 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3419 htab->glink = s;
3420 if (s == NULL
3421 || !bfd_set_section_alignment (abfd, s,
3422 htab->params->ppc476_workaround ? 6 : 4))
3423 return FALSE;
3424
3425 if (!info->no_ld_generated_unwind_info)
3426 {
3427 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3428 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3429 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3430 htab->glink_eh_frame = s;
3431 if (s == NULL
3432 || !bfd_set_section_alignment (abfd, s, 2))
3433 return FALSE;
3434 }
3435
3436 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3437 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3438 htab->iplt = s;
3439 if (s == NULL
3440 || !bfd_set_section_alignment (abfd, s, 4))
3441 return FALSE;
3442
3443 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3444 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3445 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3446 htab->reliplt = s;
3447 if (s == NULL
3448 || ! bfd_set_section_alignment (abfd, s, 2))
3449 return FALSE;
3450
3451 if (!ppc_elf_create_linker_section (abfd, info, 0,
3452 &htab->sdata[0]))
3453 return FALSE;
3454
3455 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3456 &htab->sdata[1]))
3457 return FALSE;
3458
3459 return TRUE;
3460 }
3461
3462 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3463 to output sections (just like _bfd_elf_create_dynamic_sections has
3464 to create .dynbss and .rela.bss). */
3465
3466 static bfd_boolean
3467 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3468 {
3469 struct ppc_elf_link_hash_table *htab;
3470 asection *s;
3471 flagword flags;
3472
3473 htab = ppc_elf_hash_table (info);
3474
3475 if (htab->got == NULL
3476 && !ppc_elf_create_got (abfd, info))
3477 return FALSE;
3478
3479 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3480 return FALSE;
3481
3482 if (htab->glink == NULL
3483 && !ppc_elf_create_glink (abfd, info))
3484 return FALSE;
3485
3486 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3487 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3488 SEC_ALLOC | SEC_LINKER_CREATED);
3489 htab->dynsbss = s;
3490 if (s == NULL)
3491 return FALSE;
3492
3493 if (! bfd_link_pic (info))
3494 {
3495 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3496 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3497 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3498 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3499 htab->relsbss = s;
3500 if (s == NULL
3501 || ! bfd_set_section_alignment (abfd, s, 2))
3502 return FALSE;
3503 }
3504
3505 if (htab->is_vxworks
3506 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3507 return FALSE;
3508
3509 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3510 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3511 if (s == NULL)
3512 abort ();
3513
3514 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3515 if (htab->plt_type == PLT_VXWORKS)
3516 /* The VxWorks PLT is a loaded section with contents. */
3517 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3518 return bfd_set_section_flags (abfd, s, flags);
3519 }
3520
3521 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3522
3523 static void
3524 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3525 struct elf_link_hash_entry *dir,
3526 struct elf_link_hash_entry *ind)
3527 {
3528 struct ppc_elf_link_hash_entry *edir, *eind;
3529
3530 edir = (struct ppc_elf_link_hash_entry *) dir;
3531 eind = (struct ppc_elf_link_hash_entry *) ind;
3532
3533 edir->tls_mask |= eind->tls_mask;
3534 edir->has_sda_refs |= eind->has_sda_refs;
3535
3536 /* If called to transfer flags for a weakdef during processing
3537 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3538 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3539 if (!(ELIMINATE_COPY_RELOCS
3540 && eind->elf.root.type != bfd_link_hash_indirect
3541 && edir->elf.dynamic_adjusted))
3542 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3543
3544 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3545 edir->elf.ref_regular |= eind->elf.ref_regular;
3546 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3547 edir->elf.needs_plt |= eind->elf.needs_plt;
3548 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3549
3550 if (eind->dyn_relocs != NULL)
3551 {
3552 if (edir->dyn_relocs != NULL)
3553 {
3554 struct elf_dyn_relocs **pp;
3555 struct elf_dyn_relocs *p;
3556
3557 /* Add reloc counts against the indirect sym to the direct sym
3558 list. Merge any entries against the same section. */
3559 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3560 {
3561 struct elf_dyn_relocs *q;
3562
3563 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3564 if (q->sec == p->sec)
3565 {
3566 q->pc_count += p->pc_count;
3567 q->count += p->count;
3568 *pp = p->next;
3569 break;
3570 }
3571 if (q == NULL)
3572 pp = &p->next;
3573 }
3574 *pp = edir->dyn_relocs;
3575 }
3576
3577 edir->dyn_relocs = eind->dyn_relocs;
3578 eind->dyn_relocs = NULL;
3579 }
3580
3581 /* If we were called to copy over info for a weak sym, that's all.
3582 You might think dyn_relocs need not be copied over; After all,
3583 both syms will be dynamic or both non-dynamic so we're just
3584 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3585 code in ppc_elf_adjust_dynamic_symbol needs to check for
3586 dyn_relocs in read-only sections, and it does so on what is the
3587 DIR sym here. */
3588 if (eind->elf.root.type != bfd_link_hash_indirect)
3589 return;
3590
3591 /* Copy over the GOT refcount entries that we may have already seen to
3592 the symbol which just became indirect. */
3593 edir->elf.got.refcount += eind->elf.got.refcount;
3594 eind->elf.got.refcount = 0;
3595
3596 /* And plt entries. */
3597 if (eind->elf.plt.plist != NULL)
3598 {
3599 if (edir->elf.plt.plist != NULL)
3600 {
3601 struct plt_entry **entp;
3602 struct plt_entry *ent;
3603
3604 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3605 {
3606 struct plt_entry *dent;
3607
3608 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3609 if (dent->sec == ent->sec && dent->addend == ent->addend)
3610 {
3611 dent->plt.refcount += ent->plt.refcount;
3612 *entp = ent->next;
3613 break;
3614 }
3615 if (dent == NULL)
3616 entp = &ent->next;
3617 }
3618 *entp = edir->elf.plt.plist;
3619 }
3620
3621 edir->elf.plt.plist = eind->elf.plt.plist;
3622 eind->elf.plt.plist = NULL;
3623 }
3624
3625 if (eind->elf.dynindx != -1)
3626 {
3627 if (edir->elf.dynindx != -1)
3628 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3629 edir->elf.dynstr_index);
3630 edir->elf.dynindx = eind->elf.dynindx;
3631 edir->elf.dynstr_index = eind->elf.dynstr_index;
3632 eind->elf.dynindx = -1;
3633 eind->elf.dynstr_index = 0;
3634 }
3635 }
3636
3637 /* Hook called by the linker routine which adds symbols from an object
3638 file. We use it to put .comm items in .sbss, and not .bss. */
3639
3640 static bfd_boolean
3641 ppc_elf_add_symbol_hook (bfd *abfd,
3642 struct bfd_link_info *info,
3643 Elf_Internal_Sym *sym,
3644 const char **namep ATTRIBUTE_UNUSED,
3645 flagword *flagsp ATTRIBUTE_UNUSED,
3646 asection **secp,
3647 bfd_vma *valp)
3648 {
3649 if (sym->st_shndx == SHN_COMMON
3650 && !bfd_link_relocatable (info)
3651 && is_ppc_elf (info->output_bfd)
3652 && sym->st_size <= elf_gp_size (abfd))
3653 {
3654 /* Common symbols less than or equal to -G nn bytes are automatically
3655 put into .sbss. */
3656 struct ppc_elf_link_hash_table *htab;
3657
3658 htab = ppc_elf_hash_table (info);
3659 if (htab->sbss == NULL)
3660 {
3661 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3662
3663 if (!htab->elf.dynobj)
3664 htab->elf.dynobj = abfd;
3665
3666 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3667 ".sbss",
3668 flags);
3669 if (htab->sbss == NULL)
3670 return FALSE;
3671 }
3672
3673 *secp = htab->sbss;
3674 *valp = sym->st_size;
3675 }
3676
3677 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3678 && (abfd->flags & DYNAMIC) == 0
3679 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3680 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3681
3682 return TRUE;
3683 }
3684 \f
3685 /* Find a linker generated pointer with a given addend and type. */
3686
3687 static elf_linker_section_pointers_t *
3688 elf_find_pointer_linker_section
3689 (elf_linker_section_pointers_t *linker_pointers,
3690 bfd_vma addend,
3691 elf_linker_section_t *lsect)
3692 {
3693 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3694 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3695 return linker_pointers;
3696
3697 return NULL;
3698 }
3699
3700 /* Allocate a pointer to live in a linker created section. */
3701
3702 static bfd_boolean
3703 elf_allocate_pointer_linker_section (bfd *abfd,
3704 elf_linker_section_t *lsect,
3705 struct elf_link_hash_entry *h,
3706 const Elf_Internal_Rela *rel)
3707 {
3708 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3709 elf_linker_section_pointers_t *linker_section_ptr;
3710 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3711 bfd_size_type amt;
3712
3713 BFD_ASSERT (lsect != NULL);
3714
3715 /* Is this a global symbol? */
3716 if (h != NULL)
3717 {
3718 struct ppc_elf_link_hash_entry *eh;
3719
3720 /* Has this symbol already been allocated? If so, our work is done. */
3721 eh = (struct ppc_elf_link_hash_entry *) h;
3722 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3723 rel->r_addend,
3724 lsect))
3725 return TRUE;
3726
3727 ptr_linker_section_ptr = &eh->linker_section_pointer;
3728 }
3729 else
3730 {
3731 BFD_ASSERT (is_ppc_elf (abfd));
3732
3733 /* Allocation of a pointer to a local symbol. */
3734 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3735
3736 /* Allocate a table to hold the local symbols if first time. */
3737 if (!ptr)
3738 {
3739 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3740
3741 amt = num_symbols;
3742 amt *= sizeof (elf_linker_section_pointers_t *);
3743 ptr = bfd_zalloc (abfd, amt);
3744
3745 if (!ptr)
3746 return FALSE;
3747
3748 elf_local_ptr_offsets (abfd) = ptr;
3749 }
3750
3751 /* Has this symbol already been allocated? If so, our work is done. */
3752 if (elf_find_pointer_linker_section (ptr[r_symndx],
3753 rel->r_addend,
3754 lsect))
3755 return TRUE;
3756
3757 ptr_linker_section_ptr = &ptr[r_symndx];
3758 }
3759
3760 /* Allocate space for a pointer in the linker section, and allocate
3761 a new pointer record from internal memory. */
3762 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3763 amt = sizeof (elf_linker_section_pointers_t);
3764 linker_section_ptr = bfd_alloc (abfd, amt);
3765
3766 if (!linker_section_ptr)
3767 return FALSE;
3768
3769 linker_section_ptr->next = *ptr_linker_section_ptr;
3770 linker_section_ptr->addend = rel->r_addend;
3771 linker_section_ptr->lsect = lsect;
3772 *ptr_linker_section_ptr = linker_section_ptr;
3773
3774 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3775 return FALSE;
3776 linker_section_ptr->offset = lsect->section->size;
3777 lsect->section->size += 4;
3778
3779 #ifdef DEBUG
3780 fprintf (stderr,
3781 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3782 lsect->name, (long) linker_section_ptr->offset,
3783 (long) lsect->section->size);
3784 #endif
3785
3786 return TRUE;
3787 }
3788
3789 static struct plt_entry **
3790 update_local_sym_info (bfd *abfd,
3791 Elf_Internal_Shdr *symtab_hdr,
3792 unsigned long r_symndx,
3793 int tls_type)
3794 {
3795 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3796 struct plt_entry **local_plt;
3797 char *local_got_tls_masks;
3798
3799 if (local_got_refcounts == NULL)
3800 {
3801 bfd_size_type size = symtab_hdr->sh_info;
3802
3803 size *= (sizeof (*local_got_refcounts)
3804 + sizeof (*local_plt)
3805 + sizeof (*local_got_tls_masks));
3806 local_got_refcounts = bfd_zalloc (abfd, size);
3807 if (local_got_refcounts == NULL)
3808 return NULL;
3809 elf_local_got_refcounts (abfd) = local_got_refcounts;
3810 }
3811
3812 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3813 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3814 local_got_tls_masks[r_symndx] |= tls_type;
3815 if (tls_type != PLT_IFUNC)
3816 local_got_refcounts[r_symndx] += 1;
3817 return local_plt + r_symndx;
3818 }
3819
3820 static bfd_boolean
3821 update_plt_info (bfd *abfd, struct plt_entry **plist,
3822 asection *sec, bfd_vma addend)
3823 {
3824 struct plt_entry *ent;
3825
3826 if (addend < 32768)
3827 sec = NULL;
3828 for (ent = *plist; ent != NULL; ent = ent->next)
3829 if (ent->sec == sec && ent->addend == addend)
3830 break;
3831 if (ent == NULL)
3832 {
3833 bfd_size_type amt = sizeof (*ent);
3834 ent = bfd_alloc (abfd, amt);
3835 if (ent == NULL)
3836 return FALSE;
3837 ent->next = *plist;
3838 ent->sec = sec;
3839 ent->addend = addend;
3840 ent->plt.refcount = 0;
3841 *plist = ent;
3842 }
3843 ent->plt.refcount += 1;
3844 return TRUE;
3845 }
3846
3847 static struct plt_entry *
3848 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3849 {
3850 struct plt_entry *ent;
3851
3852 if (addend < 32768)
3853 sec = NULL;
3854 for (ent = *plist; ent != NULL; ent = ent->next)
3855 if (ent->sec == sec && ent->addend == addend)
3856 break;
3857 return ent;
3858 }
3859
3860 static bfd_boolean
3861 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3862 {
3863 return (r_type == R_PPC_PLTREL24
3864 || r_type == R_PPC_LOCAL24PC
3865 || r_type == R_PPC_REL24
3866 || r_type == R_PPC_REL14
3867 || r_type == R_PPC_REL14_BRTAKEN
3868 || r_type == R_PPC_REL14_BRNTAKEN
3869 || r_type == R_PPC_ADDR24
3870 || r_type == R_PPC_ADDR14
3871 || r_type == R_PPC_ADDR14_BRTAKEN
3872 || r_type == R_PPC_ADDR14_BRNTAKEN);
3873 }
3874
3875 static void
3876 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3877 {
3878 (*_bfd_error_handler)
3879 (_("%B: relocation %s cannot be used when making a shared object"),
3880 abfd,
3881 ppc_elf_howto_table[r_type]->name);
3882 bfd_set_error (bfd_error_bad_value);
3883 }
3884
3885 /* Look through the relocs for a section during the first phase, and
3886 allocate space in the global offset table or procedure linkage
3887 table. */
3888
3889 static bfd_boolean
3890 ppc_elf_check_relocs (bfd *abfd,
3891 struct bfd_link_info *info,
3892 asection *sec,
3893 const Elf_Internal_Rela *relocs)
3894 {
3895 struct ppc_elf_link_hash_table *htab;
3896 Elf_Internal_Shdr *symtab_hdr;
3897 struct elf_link_hash_entry **sym_hashes;
3898 const Elf_Internal_Rela *rel;
3899 const Elf_Internal_Rela *rel_end;
3900 asection *got2, *sreloc;
3901 struct elf_link_hash_entry *tga;
3902
3903 if (bfd_link_relocatable (info))
3904 return TRUE;
3905
3906 /* Don't do anything special with non-loaded, non-alloced sections.
3907 In particular, any relocs in such sections should not affect GOT
3908 and PLT reference counting (ie. we don't allow them to create GOT
3909 or PLT entries), there's no possibility or desire to optimize TLS
3910 relocs, and there's not much point in propagating relocs to shared
3911 libs that the dynamic linker won't relocate. */
3912 if ((sec->flags & SEC_ALLOC) == 0)
3913 return TRUE;
3914
3915 #ifdef DEBUG
3916 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3917 sec, abfd);
3918 #endif
3919
3920 BFD_ASSERT (is_ppc_elf (abfd));
3921
3922 /* Initialize howto table if not already done. */
3923 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3924 ppc_elf_howto_init ();
3925
3926 htab = ppc_elf_hash_table (info);
3927 if (htab->glink == NULL)
3928 {
3929 if (htab->elf.dynobj == NULL)
3930 htab->elf.dynobj = abfd;
3931 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3932 return FALSE;
3933 }
3934 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3935 FALSE, FALSE, TRUE);
3936 symtab_hdr = &elf_symtab_hdr (abfd);
3937 sym_hashes = elf_sym_hashes (abfd);
3938 got2 = bfd_get_section_by_name (abfd, ".got2");
3939 sreloc = NULL;
3940
3941 rel_end = relocs + sec->reloc_count;
3942 for (rel = relocs; rel < rel_end; rel++)
3943 {
3944 unsigned long r_symndx;
3945 enum elf_ppc_reloc_type r_type;
3946 struct elf_link_hash_entry *h;
3947 int tls_type;
3948 struct plt_entry **ifunc;
3949
3950 r_symndx = ELF32_R_SYM (rel->r_info);
3951 if (r_symndx < symtab_hdr->sh_info)
3952 h = NULL;
3953 else
3954 {
3955 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3956 while (h->root.type == bfd_link_hash_indirect
3957 || h->root.type == bfd_link_hash_warning)
3958 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3959
3960 /* PR15323, ref flags aren't set for references in the same
3961 object. */
3962 h->root.non_ir_ref = 1;
3963 }
3964
3965 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3966 This shows up in particular in an R_PPC_ADDR32 in the eabi
3967 startup code. */
3968 if (h != NULL
3969 && htab->got == NULL
3970 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3971 {
3972 if (htab->elf.dynobj == NULL)
3973 htab->elf.dynobj = abfd;
3974 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3975 return FALSE;
3976 BFD_ASSERT (h == htab->elf.hgot);
3977 }
3978
3979 tls_type = 0;
3980 r_type = ELF32_R_TYPE (rel->r_info);
3981 ifunc = NULL;
3982 if (h == NULL && !htab->is_vxworks)
3983 {
3984 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3985 abfd, r_symndx);
3986 if (isym == NULL)
3987 return FALSE;
3988
3989 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3990 {
3991 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3992 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3993 PLT_IFUNC);
3994 if (ifunc == NULL)
3995 return FALSE;
3996
3997 /* STT_GNU_IFUNC symbols must have a PLT entry;
3998 In a non-pie executable even when there are
3999 no plt calls. */
4000 if (!bfd_link_pic (info)
4001 || is_branch_reloc (r_type))
4002 {
4003 bfd_vma addend = 0;
4004 if (r_type == R_PPC_PLTREL24)
4005 {
4006 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4007 if (bfd_link_pic (info))
4008 addend = rel->r_addend;
4009 }
4010 if (!update_plt_info (abfd, ifunc, got2, addend))
4011 return FALSE;
4012 }
4013 }
4014 }
4015
4016 if (!htab->is_vxworks
4017 && is_branch_reloc (r_type)
4018 && h != NULL
4019 && h == tga)
4020 {
4021 if (rel != relocs
4022 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4023 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4024 /* We have a new-style __tls_get_addr call with a marker
4025 reloc. */
4026 ;
4027 else
4028 /* Mark this section as having an old-style call. */
4029 sec->has_tls_get_addr_call = 1;
4030 }
4031
4032 switch (r_type)
4033 {
4034 case R_PPC_TLSGD:
4035 case R_PPC_TLSLD:
4036 /* These special tls relocs tie a call to __tls_get_addr with
4037 its parameter symbol. */
4038 break;
4039
4040 case R_PPC_GOT_TLSLD16:
4041 case R_PPC_GOT_TLSLD16_LO:
4042 case R_PPC_GOT_TLSLD16_HI:
4043 case R_PPC_GOT_TLSLD16_HA:
4044 tls_type = TLS_TLS | TLS_LD;
4045 goto dogottls;
4046
4047 case R_PPC_GOT_TLSGD16:
4048 case R_PPC_GOT_TLSGD16_LO:
4049 case R_PPC_GOT_TLSGD16_HI:
4050 case R_PPC_GOT_TLSGD16_HA:
4051 tls_type = TLS_TLS | TLS_GD;
4052 goto dogottls;
4053
4054 case R_PPC_GOT_TPREL16:
4055 case R_PPC_GOT_TPREL16_LO:
4056 case R_PPC_GOT_TPREL16_HI:
4057 case R_PPC_GOT_TPREL16_HA:
4058 if (bfd_link_pic (info))
4059 info->flags |= DF_STATIC_TLS;
4060 tls_type = TLS_TLS | TLS_TPREL;
4061 goto dogottls;
4062
4063 case R_PPC_GOT_DTPREL16:
4064 case R_PPC_GOT_DTPREL16_LO:
4065 case R_PPC_GOT_DTPREL16_HI:
4066 case R_PPC_GOT_DTPREL16_HA:
4067 tls_type = TLS_TLS | TLS_DTPREL;
4068 dogottls:
4069 sec->has_tls_reloc = 1;
4070 /* Fall thru */
4071
4072 /* GOT16 relocations */
4073 case R_PPC_GOT16:
4074 case R_PPC_GOT16_LO:
4075 case R_PPC_GOT16_HI:
4076 case R_PPC_GOT16_HA:
4077 /* This symbol requires a global offset table entry. */
4078 if (htab->got == NULL)
4079 {
4080 if (htab->elf.dynobj == NULL)
4081 htab->elf.dynobj = abfd;
4082 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4083 return FALSE;
4084 }
4085 if (h != NULL)
4086 {
4087 h->got.refcount += 1;
4088 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4089 }
4090 else
4091 /* This is a global offset table entry for a local symbol. */
4092 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4093 return FALSE;
4094
4095 /* We may also need a plt entry if the symbol turns out to be
4096 an ifunc. */
4097 if (h != NULL && !bfd_link_pic (info))
4098 {
4099 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4100 return FALSE;
4101 }
4102 break;
4103
4104 /* Indirect .sdata relocation. */
4105 case R_PPC_EMB_SDAI16:
4106 if (bfd_link_pic (info))
4107 {
4108 bad_shared_reloc (abfd, r_type);
4109 return FALSE;
4110 }
4111 htab->sdata[0].sym->ref_regular = 1;
4112 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4113 h, rel))
4114 return FALSE;
4115 if (h != NULL)
4116 {
4117 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4118 h->non_got_ref = TRUE;
4119 }
4120 break;
4121
4122 /* Indirect .sdata2 relocation. */
4123 case R_PPC_EMB_SDA2I16:
4124 if (bfd_link_pic (info))
4125 {
4126 bad_shared_reloc (abfd, r_type);
4127 return FALSE;
4128 }
4129 htab->sdata[1].sym->ref_regular = 1;
4130 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4131 h, rel))
4132 return FALSE;
4133 if (h != NULL)
4134 {
4135 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4136 h->non_got_ref = TRUE;
4137 }
4138 break;
4139
4140 case R_PPC_SDAREL16:
4141 htab->sdata[0].sym->ref_regular = 1;
4142 /* Fall thru */
4143
4144 case R_PPC_VLE_SDAREL_LO16A:
4145 case R_PPC_VLE_SDAREL_LO16D:
4146 case R_PPC_VLE_SDAREL_HI16A:
4147 case R_PPC_VLE_SDAREL_HI16D:
4148 case R_PPC_VLE_SDAREL_HA16A:
4149 case R_PPC_VLE_SDAREL_HA16D:
4150 if (h != NULL)
4151 {
4152 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4153 h->non_got_ref = TRUE;
4154 }
4155 break;
4156
4157 case R_PPC_VLE_REL8:
4158 case R_PPC_VLE_REL15:
4159 case R_PPC_VLE_REL24:
4160 case R_PPC_VLE_LO16A:
4161 case R_PPC_VLE_LO16D:
4162 case R_PPC_VLE_HI16A:
4163 case R_PPC_VLE_HI16D:
4164 case R_PPC_VLE_HA16A:
4165 case R_PPC_VLE_HA16D:
4166 break;
4167
4168 case R_PPC_EMB_SDA2REL:
4169 if (bfd_link_pic (info))
4170 {
4171 bad_shared_reloc (abfd, r_type);
4172 return FALSE;
4173 }
4174 htab->sdata[1].sym->ref_regular = 1;
4175 if (h != NULL)
4176 {
4177 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4178 h->non_got_ref = TRUE;
4179 }
4180 break;
4181
4182 case R_PPC_VLE_SDA21_LO:
4183 case R_PPC_VLE_SDA21:
4184 case R_PPC_EMB_SDA21:
4185 case R_PPC_EMB_RELSDA:
4186 if (bfd_link_pic (info))
4187 {
4188 bad_shared_reloc (abfd, r_type);
4189 return FALSE;
4190 }
4191 if (h != NULL)
4192 {
4193 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4194 h->non_got_ref = TRUE;
4195 }
4196 break;
4197
4198 case R_PPC_EMB_NADDR32:
4199 case R_PPC_EMB_NADDR16:
4200 case R_PPC_EMB_NADDR16_LO:
4201 case R_PPC_EMB_NADDR16_HI:
4202 case R_PPC_EMB_NADDR16_HA:
4203 if (bfd_link_pic (info))
4204 {
4205 bad_shared_reloc (abfd, r_type);
4206 return FALSE;
4207 }
4208 if (h != NULL)
4209 h->non_got_ref = TRUE;
4210 break;
4211
4212 case R_PPC_PLTREL24:
4213 if (h == NULL)
4214 break;
4215 /* Fall through */
4216 case R_PPC_PLT32:
4217 case R_PPC_PLTREL32:
4218 case R_PPC_PLT16_LO:
4219 case R_PPC_PLT16_HI:
4220 case R_PPC_PLT16_HA:
4221 #ifdef DEBUG
4222 fprintf (stderr, "Reloc requires a PLT entry\n");
4223 #endif
4224 /* This symbol requires a procedure linkage table entry. */
4225 if (h == NULL)
4226 {
4227 if (ifunc == NULL)
4228 {
4229 /* It does not make sense to have a procedure linkage
4230 table entry for a non-ifunc local symbol. */
4231 info->callbacks->einfo
4232 (_("%P: %H: %s reloc against local symbol\n"),
4233 abfd, sec, rel->r_offset,
4234 ppc_elf_howto_table[r_type]->name);
4235 bfd_set_error (bfd_error_bad_value);
4236 return FALSE;
4237 }
4238 }
4239 else
4240 {
4241 bfd_vma addend = 0;
4242
4243 if (r_type == R_PPC_PLTREL24)
4244 {
4245 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4246 if (bfd_link_pic (info))
4247 addend = rel->r_addend;
4248 }
4249 h->needs_plt = 1;
4250 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4251 return FALSE;
4252 }
4253 break;
4254
4255 /* The following relocations don't need to propagate the
4256 relocation if linking a shared object since they are
4257 section relative. */
4258 case R_PPC_SECTOFF:
4259 case R_PPC_SECTOFF_LO:
4260 case R_PPC_SECTOFF_HI:
4261 case R_PPC_SECTOFF_HA:
4262 case R_PPC_DTPREL16:
4263 case R_PPC_DTPREL16_LO:
4264 case R_PPC_DTPREL16_HI:
4265 case R_PPC_DTPREL16_HA:
4266 case R_PPC_TOC16:
4267 break;
4268
4269 case R_PPC_REL16:
4270 case R_PPC_REL16_LO:
4271 case R_PPC_REL16_HI:
4272 case R_PPC_REL16_HA:
4273 case R_PPC_REL16DX_HA:
4274 ppc_elf_tdata (abfd)->has_rel16 = 1;
4275 break;
4276
4277 /* These are just markers. */
4278 case R_PPC_TLS:
4279 case R_PPC_EMB_MRKREF:
4280 case R_PPC_NONE:
4281 case R_PPC_max:
4282 case R_PPC_RELAX:
4283 case R_PPC_RELAX_PLT:
4284 case R_PPC_RELAX_PLTREL24:
4285 break;
4286
4287 /* These should only appear in dynamic objects. */
4288 case R_PPC_COPY:
4289 case R_PPC_GLOB_DAT:
4290 case R_PPC_JMP_SLOT:
4291 case R_PPC_RELATIVE:
4292 case R_PPC_IRELATIVE:
4293 break;
4294
4295 /* These aren't handled yet. We'll report an error later. */
4296 case R_PPC_ADDR30:
4297 case R_PPC_EMB_RELSEC16:
4298 case R_PPC_EMB_RELST_LO:
4299 case R_PPC_EMB_RELST_HI:
4300 case R_PPC_EMB_RELST_HA:
4301 case R_PPC_EMB_BIT_FLD:
4302 break;
4303
4304 /* This refers only to functions defined in the shared library. */
4305 case R_PPC_LOCAL24PC:
4306 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4307 {
4308 htab->plt_type = PLT_OLD;
4309 htab->old_bfd = abfd;
4310 }
4311 if (h != NULL && h->type == STT_GNU_IFUNC)
4312 {
4313 if (bfd_link_pic (info))
4314 {
4315 info->callbacks->einfo
4316 (_("%P: %H: @local call to ifunc %s\n"),
4317 abfd, sec, rel->r_offset,
4318 h->root.root.string);
4319 bfd_set_error (bfd_error_bad_value);
4320 return FALSE;
4321 }
4322 h->needs_plt = 1;
4323 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4324 return FALSE;
4325 }
4326 break;
4327
4328 /* This relocation describes the C++ object vtable hierarchy.
4329 Reconstruct it for later use during GC. */
4330 case R_PPC_GNU_VTINHERIT:
4331 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4332 return FALSE;
4333 break;
4334
4335 /* This relocation describes which C++ vtable entries are actually
4336 used. Record for later use during GC. */
4337 case R_PPC_GNU_VTENTRY:
4338 BFD_ASSERT (h != NULL);
4339 if (h != NULL
4340 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4341 return FALSE;
4342 break;
4343
4344 /* We shouldn't really be seeing these. */
4345 case R_PPC_TPREL32:
4346 case R_PPC_TPREL16:
4347 case R_PPC_TPREL16_LO:
4348 case R_PPC_TPREL16_HI:
4349 case R_PPC_TPREL16_HA:
4350 if (bfd_link_pic (info))
4351 info->flags |= DF_STATIC_TLS;
4352 goto dodyn;
4353
4354 /* Nor these. */
4355 case R_PPC_DTPMOD32:
4356 case R_PPC_DTPREL32:
4357 goto dodyn;
4358
4359 case R_PPC_REL32:
4360 if (h == NULL
4361 && got2 != NULL
4362 && (sec->flags & SEC_CODE) != 0
4363 && bfd_link_pic (info)
4364 && htab->plt_type == PLT_UNSET)
4365 {
4366 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4367 the start of a function, which assembles to a REL32
4368 reference to .got2. If we detect one of these, then
4369 force the old PLT layout because the linker cannot
4370 reliably deduce the GOT pointer value needed for
4371 PLT call stubs. */
4372 asection *s;
4373 Elf_Internal_Sym *isym;
4374
4375 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4376 abfd, r_symndx);
4377 if (isym == NULL)
4378 return FALSE;
4379
4380 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4381 if (s == got2)
4382 {
4383 htab->plt_type = PLT_OLD;
4384 htab->old_bfd = abfd;
4385 }
4386 }
4387 if (h == NULL || h == htab->elf.hgot)
4388 break;
4389 /* fall through */
4390
4391 case R_PPC_ADDR32:
4392 case R_PPC_ADDR16:
4393 case R_PPC_ADDR16_LO:
4394 case R_PPC_ADDR16_HI:
4395 case R_PPC_ADDR16_HA:
4396 case R_PPC_UADDR32:
4397 case R_PPC_UADDR16:
4398 if (h != NULL && !bfd_link_pic (info))
4399 {
4400 /* We may need a plt entry if the symbol turns out to be
4401 a function defined in a dynamic object. */
4402 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4403 return FALSE;
4404
4405 /* We may need a copy reloc too. */
4406 h->non_got_ref = 1;
4407 h->pointer_equality_needed = 1;
4408 if (r_type == R_PPC_ADDR16_HA)
4409 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4410 if (r_type == R_PPC_ADDR16_LO)
4411 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4412 }
4413 goto dodyn;
4414
4415 case R_PPC_REL24:
4416 case R_PPC_REL14:
4417 case R_PPC_REL14_BRTAKEN:
4418 case R_PPC_REL14_BRNTAKEN:
4419 if (h == NULL)
4420 break;
4421 if (h == htab->elf.hgot)
4422 {
4423 if (htab->plt_type == PLT_UNSET)
4424 {
4425 htab->plt_type = PLT_OLD;
4426 htab->old_bfd = abfd;
4427 }
4428 break;
4429 }
4430 /* fall through */
4431
4432 case R_PPC_ADDR24:
4433 case R_PPC_ADDR14:
4434 case R_PPC_ADDR14_BRTAKEN:
4435 case R_PPC_ADDR14_BRNTAKEN:
4436 if (h != NULL && !bfd_link_pic (info))
4437 {
4438 /* We may need a plt entry if the symbol turns out to be
4439 a function defined in a dynamic object. */
4440 h->needs_plt = 1;
4441 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4442 return FALSE;
4443 break;
4444 }
4445
4446 dodyn:
4447 /* If we are creating a shared library, and this is a reloc
4448 against a global symbol, or a non PC relative reloc
4449 against a local symbol, then we need to copy the reloc
4450 into the shared library. However, if we are linking with
4451 -Bsymbolic, we do not need to copy a reloc against a
4452 global symbol which is defined in an object we are
4453 including in the link (i.e., DEF_REGULAR is set). At
4454 this point we have not seen all the input files, so it is
4455 possible that DEF_REGULAR is not set now but will be set
4456 later (it is never cleared). In case of a weak definition,
4457 DEF_REGULAR may be cleared later by a strong definition in
4458 a shared library. We account for that possibility below by
4459 storing information in the dyn_relocs field of the hash
4460 table entry. A similar situation occurs when creating
4461 shared libraries and symbol visibility changes render the
4462 symbol local.
4463
4464 If on the other hand, we are creating an executable, we
4465 may need to keep relocations for symbols satisfied by a
4466 dynamic library if we manage to avoid copy relocs for the
4467 symbol. */
4468 if ((bfd_link_pic (info)
4469 && (must_be_dyn_reloc (info, r_type)
4470 || (h != NULL
4471 && (!SYMBOLIC_BIND (info, h)
4472 || h->root.type == bfd_link_hash_defweak
4473 || !h->def_regular))))
4474 || (ELIMINATE_COPY_RELOCS
4475 && !bfd_link_pic (info)
4476 && h != NULL
4477 && (h->root.type == bfd_link_hash_defweak
4478 || !h->def_regular)))
4479 {
4480 #ifdef DEBUG
4481 fprintf (stderr,
4482 "ppc_elf_check_relocs needs to "
4483 "create relocation for %s\n",
4484 (h && h->root.root.string
4485 ? h->root.root.string : "<unknown>"));
4486 #endif
4487 if (sreloc == NULL)
4488 {
4489 if (htab->elf.dynobj == NULL)
4490 htab->elf.dynobj = abfd;
4491
4492 sreloc = _bfd_elf_make_dynamic_reloc_section
4493 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4494
4495 if (sreloc == NULL)
4496 return FALSE;
4497 }
4498
4499 /* If this is a global symbol, we count the number of
4500 relocations we need for this symbol. */
4501 if (h != NULL)
4502 {
4503 struct elf_dyn_relocs *p;
4504 struct elf_dyn_relocs **rel_head;
4505
4506 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4507 p = *rel_head;
4508 if (p == NULL || p->sec != sec)
4509 {
4510 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4511 if (p == NULL)
4512 return FALSE;
4513 p->next = *rel_head;
4514 *rel_head = p;
4515 p->sec = sec;
4516 p->count = 0;
4517 p->pc_count = 0;
4518 }
4519 p->count += 1;
4520 if (!must_be_dyn_reloc (info, r_type))
4521 p->pc_count += 1;
4522 }
4523 else
4524 {
4525 /* Track dynamic relocs needed for local syms too.
4526 We really need local syms available to do this
4527 easily. Oh well. */
4528 struct ppc_dyn_relocs *p;
4529 struct ppc_dyn_relocs **rel_head;
4530 bfd_boolean is_ifunc;
4531 asection *s;
4532 void *vpp;
4533 Elf_Internal_Sym *isym;
4534
4535 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4536 abfd, r_symndx);
4537 if (isym == NULL)
4538 return FALSE;
4539
4540 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4541 if (s == NULL)
4542 s = sec;
4543
4544 vpp = &elf_section_data (s)->local_dynrel;
4545 rel_head = (struct ppc_dyn_relocs **) vpp;
4546 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4547 p = *rel_head;
4548 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4549 p = p->next;
4550 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4551 {
4552 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4553 if (p == NULL)
4554 return FALSE;
4555 p->next = *rel_head;
4556 *rel_head = p;
4557 p->sec = sec;
4558 p->ifunc = is_ifunc;
4559 p->count = 0;
4560 }
4561 p->count += 1;
4562 }
4563 }
4564
4565 break;
4566 }
4567 }
4568
4569 return TRUE;
4570 }
4571 \f
4572
4573 /* Merge object attributes from IBFD into OBFD. Raise an error if
4574 there are conflicting attributes. */
4575 static bfd_boolean
4576 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4577 {
4578 obj_attribute *in_attr, *in_attrs;
4579 obj_attribute *out_attr, *out_attrs;
4580
4581 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4582 {
4583 /* This is the first object. Copy the attributes. */
4584 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4585
4586 /* Use the Tag_null value to indicate the attributes have been
4587 initialized. */
4588 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4589
4590 return TRUE;
4591 }
4592
4593 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4594 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4595
4596 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4597 non-conflicting ones. */
4598 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4599 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4600 if (in_attr->i != out_attr->i)
4601 {
4602 out_attr->type = 1;
4603 if (out_attr->i == 0)
4604 out_attr->i = in_attr->i;
4605 else if (in_attr->i == 0)
4606 ;
4607 else if (out_attr->i == 1 && in_attr->i == 2)
4608 _bfd_error_handler
4609 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4610 else if (out_attr->i == 1 && in_attr->i == 3)
4611 _bfd_error_handler
4612 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4613 obfd, ibfd);
4614 else if (out_attr->i == 3 && in_attr->i == 1)
4615 _bfd_error_handler
4616 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4617 ibfd, obfd);
4618 else if (out_attr->i == 3 && in_attr->i == 2)
4619 _bfd_error_handler
4620 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4621 ibfd, obfd);
4622 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4623 _bfd_error_handler
4624 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4625 else if (in_attr->i > 3)
4626 _bfd_error_handler
4627 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4628 in_attr->i);
4629 else
4630 _bfd_error_handler
4631 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4632 out_attr->i);
4633 }
4634
4635 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4636 merge non-conflicting ones. */
4637 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4638 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4639 if (in_attr->i != out_attr->i)
4640 {
4641 const char *in_abi = NULL, *out_abi = NULL;
4642
4643 switch (in_attr->i)
4644 {
4645 case 1: in_abi = "generic"; break;
4646 case 2: in_abi = "AltiVec"; break;
4647 case 3: in_abi = "SPE"; break;
4648 }
4649
4650 switch (out_attr->i)
4651 {
4652 case 1: out_abi = "generic"; break;
4653 case 2: out_abi = "AltiVec"; break;
4654 case 3: out_abi = "SPE"; break;
4655 }
4656
4657 out_attr->type = 1;
4658 if (out_attr->i == 0)
4659 out_attr->i = in_attr->i;
4660 else if (in_attr->i == 0)
4661 ;
4662 /* For now, allow generic to transition to AltiVec or SPE
4663 without a warning. If GCC marked files with their stack
4664 alignment and used don't-care markings for files which are
4665 not affected by the vector ABI, we could warn about this
4666 case too. */
4667 else if (out_attr->i == 1)
4668 out_attr->i = in_attr->i;
4669 else if (in_attr->i == 1)
4670 ;
4671 else if (in_abi == NULL)
4672 _bfd_error_handler
4673 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4674 in_attr->i);
4675 else if (out_abi == NULL)
4676 _bfd_error_handler
4677 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4678 in_attr->i);
4679 else
4680 _bfd_error_handler
4681 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4682 ibfd, obfd, in_abi, out_abi);
4683 }
4684
4685 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4686 and merge non-conflicting ones. */
4687 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4688 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4689 if (in_attr->i != out_attr->i)
4690 {
4691 out_attr->type = 1;
4692 if (out_attr->i == 0)
4693 out_attr->i = in_attr->i;
4694 else if (in_attr->i == 0)
4695 ;
4696 else if (out_attr->i == 1 && in_attr->i == 2)
4697 _bfd_error_handler
4698 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4699 else if (out_attr->i == 2 && in_attr->i == 1)
4700 _bfd_error_handler
4701 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4702 else if (in_attr->i > 2)
4703 _bfd_error_handler
4704 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4705 in_attr->i);
4706 else
4707 _bfd_error_handler
4708 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4709 out_attr->i);
4710 }
4711
4712 /* Merge Tag_compatibility attributes and any common GNU ones. */
4713 _bfd_elf_merge_object_attributes (ibfd, obfd);
4714
4715 return TRUE;
4716 }
4717
4718 /* Merge backend specific data from an object file to the output
4719 object file when linking. */
4720
4721 static bfd_boolean
4722 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4723 {
4724 flagword old_flags;
4725 flagword new_flags;
4726 bfd_boolean error;
4727
4728 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4729 return TRUE;
4730
4731 /* Check if we have the same endianness. */
4732 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4733 return FALSE;
4734
4735 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4736 return FALSE;
4737
4738 new_flags = elf_elfheader (ibfd)->e_flags;
4739 old_flags = elf_elfheader (obfd)->e_flags;
4740 if (!elf_flags_init (obfd))
4741 {
4742 /* First call, no flags set. */
4743 elf_flags_init (obfd) = TRUE;
4744 elf_elfheader (obfd)->e_flags = new_flags;
4745 }
4746
4747 /* Compatible flags are ok. */
4748 else if (new_flags == old_flags)
4749 ;
4750
4751 /* Incompatible flags. */
4752 else
4753 {
4754 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4755 to be linked with either. */
4756 error = FALSE;
4757 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4758 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4759 {
4760 error = TRUE;
4761 (*_bfd_error_handler)
4762 (_("%B: compiled with -mrelocatable and linked with "
4763 "modules compiled normally"), ibfd);
4764 }
4765 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4766 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4767 {
4768 error = TRUE;
4769 (*_bfd_error_handler)
4770 (_("%B: compiled normally and linked with "
4771 "modules compiled with -mrelocatable"), ibfd);
4772 }
4773
4774 /* The output is -mrelocatable-lib iff both the input files are. */
4775 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4776 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4777
4778 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4779 but each input file is either -mrelocatable or -mrelocatable-lib. */
4780 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4781 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4782 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4783 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4784
4785 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4786 any module uses it. */
4787 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4788
4789 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4790 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4791
4792 /* Warn about any other mismatches. */
4793 if (new_flags != old_flags)
4794 {
4795 error = TRUE;
4796 (*_bfd_error_handler)
4797 (_("%B: uses different e_flags (0x%lx) fields "
4798 "than previous modules (0x%lx)"),
4799 ibfd, (long) new_flags, (long) old_flags);
4800 }
4801
4802 if (error)
4803 {
4804 bfd_set_error (bfd_error_bad_value);
4805 return FALSE;
4806 }
4807 }
4808
4809 return TRUE;
4810 }
4811
4812 static void
4813 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4814 bfd_vma value,
4815 split16_format_type split16_format)
4816
4817 {
4818 unsigned int insn, top5;
4819
4820 insn = bfd_get_32 (output_bfd, loc);
4821 top5 = value & 0xf800;
4822 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4823 insn |= top5;
4824 insn |= value & 0x7ff;
4825 bfd_put_32 (output_bfd, insn, loc);
4826 }
4827
4828 \f
4829 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4830 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4831 int
4832 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4833 struct bfd_link_info *info)
4834 {
4835 struct ppc_elf_link_hash_table *htab;
4836 flagword flags;
4837
4838 htab = ppc_elf_hash_table (info);
4839
4840 if (htab->plt_type == PLT_UNSET)
4841 {
4842 struct elf_link_hash_entry *h;
4843
4844 if (htab->params->plt_style == PLT_OLD)
4845 htab->plt_type = PLT_OLD;
4846 else if (bfd_link_pic (info)
4847 && htab->elf.dynamic_sections_created
4848 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4849 FALSE, FALSE, TRUE)) != NULL
4850 && (h->type == STT_FUNC
4851 || h->needs_plt)
4852 && h->ref_regular
4853 && !(SYMBOL_CALLS_LOCAL (info, h)
4854 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4855 && h->root.type == bfd_link_hash_undefweak)))
4856 {
4857 /* Profiling of shared libs (and pies) is not supported with
4858 secure plt, because ppc32 does profiling before a
4859 function prologue and a secure plt pic call stubs needs
4860 r30 to be set up. */
4861 htab->plt_type = PLT_OLD;
4862 }
4863 else
4864 {
4865 bfd *ibfd;
4866 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4867
4868 /* Look through the reloc flags left by ppc_elf_check_relocs.
4869 Use the old style bss plt if a file makes plt calls
4870 without using the new relocs, and if ld isn't given
4871 --secure-plt and we never see REL16 relocs. */
4872 if (plt_type == PLT_UNSET)
4873 plt_type = PLT_OLD;
4874 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4875 if (is_ppc_elf (ibfd))
4876 {
4877 if (ppc_elf_tdata (ibfd)->has_rel16)
4878 plt_type = PLT_NEW;
4879 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4880 {
4881 plt_type = PLT_OLD;
4882 htab->old_bfd = ibfd;
4883 break;
4884 }
4885 }
4886 htab->plt_type = plt_type;
4887 }
4888 }
4889 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4890 {
4891 if (htab->old_bfd != NULL)
4892 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4893 htab->old_bfd);
4894 else
4895 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4896 }
4897
4898 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4899
4900 if (htab->plt_type == PLT_NEW)
4901 {
4902 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4903 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4904
4905 /* The new PLT is a loaded section. */
4906 if (htab->plt != NULL
4907 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4908 return -1;
4909
4910 /* The new GOT is not executable. */
4911 if (htab->got != NULL
4912 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4913 return -1;
4914 }
4915 else
4916 {
4917 /* Stop an unused .glink section from affecting .text alignment. */
4918 if (htab->glink != NULL
4919 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4920 return -1;
4921 }
4922 return htab->plt_type == PLT_NEW;
4923 }
4924 \f
4925 /* Return the section that should be marked against GC for a given
4926 relocation. */
4927
4928 static asection *
4929 ppc_elf_gc_mark_hook (asection *sec,
4930 struct bfd_link_info *info,
4931 Elf_Internal_Rela *rel,
4932 struct elf_link_hash_entry *h,
4933 Elf_Internal_Sym *sym)
4934 {
4935 if (h != NULL)
4936 switch (ELF32_R_TYPE (rel->r_info))
4937 {
4938 case R_PPC_GNU_VTINHERIT:
4939 case R_PPC_GNU_VTENTRY:
4940 return NULL;
4941 }
4942
4943 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4944 }
4945
4946 /* Update the got, plt and dynamic reloc reference counts for the
4947 section being removed. */
4948
4949 static bfd_boolean
4950 ppc_elf_gc_sweep_hook (bfd *abfd,
4951 struct bfd_link_info *info,
4952 asection *sec,
4953 const Elf_Internal_Rela *relocs)
4954 {
4955 struct ppc_elf_link_hash_table *htab;
4956 Elf_Internal_Shdr *symtab_hdr;
4957 struct elf_link_hash_entry **sym_hashes;
4958 bfd_signed_vma *local_got_refcounts;
4959 const Elf_Internal_Rela *rel, *relend;
4960 asection *got2;
4961
4962 if (bfd_link_relocatable (info))
4963 return TRUE;
4964
4965 if ((sec->flags & SEC_ALLOC) == 0)
4966 return TRUE;
4967
4968 elf_section_data (sec)->local_dynrel = NULL;
4969
4970 htab = ppc_elf_hash_table (info);
4971 symtab_hdr = &elf_symtab_hdr (abfd);
4972 sym_hashes = elf_sym_hashes (abfd);
4973 local_got_refcounts = elf_local_got_refcounts (abfd);
4974 got2 = bfd_get_section_by_name (abfd, ".got2");
4975
4976 relend = relocs + sec->reloc_count;
4977 for (rel = relocs; rel < relend; rel++)
4978 {
4979 unsigned long r_symndx;
4980 enum elf_ppc_reloc_type r_type;
4981 struct elf_link_hash_entry *h = NULL;
4982
4983 r_symndx = ELF32_R_SYM (rel->r_info);
4984 if (r_symndx >= symtab_hdr->sh_info)
4985 {
4986 struct elf_dyn_relocs **pp, *p;
4987 struct ppc_elf_link_hash_entry *eh;
4988
4989 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4990 while (h->root.type == bfd_link_hash_indirect
4991 || h->root.type == bfd_link_hash_warning)
4992 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4993 eh = (struct ppc_elf_link_hash_entry *) h;
4994
4995 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4996 if (p->sec == sec)
4997 {
4998 /* Everything must go for SEC. */
4999 *pp = p->next;
5000 break;
5001 }
5002 }
5003
5004 r_type = ELF32_R_TYPE (rel->r_info);
5005 if (!htab->is_vxworks
5006 && h == NULL
5007 && local_got_refcounts != NULL
5008 && (!bfd_link_pic (info)
5009 || is_branch_reloc (r_type)))
5010 {
5011 struct plt_entry **local_plt = (struct plt_entry **)
5012 (local_got_refcounts + symtab_hdr->sh_info);
5013 char *local_got_tls_masks = (char *)
5014 (local_plt + symtab_hdr->sh_info);
5015 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5016 {
5017 struct plt_entry **ifunc = local_plt + r_symndx;
5018 bfd_vma addend = 0;
5019 struct plt_entry *ent;
5020
5021 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5022 addend = rel->r_addend;
5023 ent = find_plt_ent (ifunc, got2, addend);
5024 if (ent->plt.refcount > 0)
5025 ent->plt.refcount -= 1;
5026 continue;
5027 }
5028 }
5029
5030 switch (r_type)
5031 {
5032 case R_PPC_GOT_TLSLD16:
5033 case R_PPC_GOT_TLSLD16_LO:
5034 case R_PPC_GOT_TLSLD16_HI:
5035 case R_PPC_GOT_TLSLD16_HA:
5036 case R_PPC_GOT_TLSGD16:
5037 case R_PPC_GOT_TLSGD16_LO:
5038 case R_PPC_GOT_TLSGD16_HI:
5039 case R_PPC_GOT_TLSGD16_HA:
5040 case R_PPC_GOT_TPREL16:
5041 case R_PPC_GOT_TPREL16_LO:
5042 case R_PPC_GOT_TPREL16_HI:
5043 case R_PPC_GOT_TPREL16_HA:
5044 case R_PPC_GOT_DTPREL16:
5045 case R_PPC_GOT_DTPREL16_LO:
5046 case R_PPC_GOT_DTPREL16_HI:
5047 case R_PPC_GOT_DTPREL16_HA:
5048 case R_PPC_GOT16:
5049 case R_PPC_GOT16_LO:
5050 case R_PPC_GOT16_HI:
5051 case R_PPC_GOT16_HA:
5052 if (h != NULL)
5053 {
5054 if (h->got.refcount > 0)
5055 h->got.refcount--;
5056 if (!bfd_link_pic (info))
5057 {
5058 struct plt_entry *ent;
5059
5060 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5061 if (ent != NULL && ent->plt.refcount > 0)
5062 ent->plt.refcount -= 1;
5063 }
5064 }
5065 else if (local_got_refcounts != NULL)
5066 {
5067 if (local_got_refcounts[r_symndx] > 0)
5068 local_got_refcounts[r_symndx]--;
5069 }
5070 break;
5071
5072 case R_PPC_REL24:
5073 case R_PPC_REL14:
5074 case R_PPC_REL14_BRTAKEN:
5075 case R_PPC_REL14_BRNTAKEN:
5076 case R_PPC_REL32:
5077 if (h == NULL || h == htab->elf.hgot)
5078 break;
5079 /* Fall thru */
5080
5081 case R_PPC_ADDR32:
5082 case R_PPC_ADDR24:
5083 case R_PPC_ADDR16:
5084 case R_PPC_ADDR16_LO:
5085 case R_PPC_ADDR16_HI:
5086 case R_PPC_ADDR16_HA:
5087 case R_PPC_ADDR14:
5088 case R_PPC_ADDR14_BRTAKEN:
5089 case R_PPC_ADDR14_BRNTAKEN:
5090 case R_PPC_UADDR32:
5091 case R_PPC_UADDR16:
5092 if (bfd_link_pic (info))
5093 break;
5094
5095 case R_PPC_PLT32:
5096 case R_PPC_PLTREL24:
5097 case R_PPC_PLTREL32:
5098 case R_PPC_PLT16_LO:
5099 case R_PPC_PLT16_HI:
5100 case R_PPC_PLT16_HA:
5101 if (h != NULL)
5102 {
5103 bfd_vma addend = 0;
5104 struct plt_entry *ent;
5105
5106 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5107 addend = rel->r_addend;
5108 ent = find_plt_ent (&h->plt.plist, got2, addend);
5109 if (ent != NULL && ent->plt.refcount > 0)
5110 ent->plt.refcount -= 1;
5111 }
5112 break;
5113
5114 default:
5115 break;
5116 }
5117 }
5118 return TRUE;
5119 }
5120 \f
5121 /* Set plt output section type, htab->tls_get_addr, and call the
5122 generic ELF tls_setup function. */
5123
5124 asection *
5125 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5126 {
5127 struct ppc_elf_link_hash_table *htab;
5128
5129 htab = ppc_elf_hash_table (info);
5130 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5131 FALSE, FALSE, TRUE);
5132 if (htab->plt_type != PLT_NEW)
5133 htab->params->no_tls_get_addr_opt = TRUE;
5134
5135 if (!htab->params->no_tls_get_addr_opt)
5136 {
5137 struct elf_link_hash_entry *opt, *tga;
5138 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5139 FALSE, FALSE, TRUE);
5140 if (opt != NULL
5141 && (opt->root.type == bfd_link_hash_defined
5142 || opt->root.type == bfd_link_hash_defweak))
5143 {
5144 /* If glibc supports an optimized __tls_get_addr call stub,
5145 signalled by the presence of __tls_get_addr_opt, and we'll
5146 be calling __tls_get_addr via a plt call stub, then
5147 make __tls_get_addr point to __tls_get_addr_opt. */
5148 tga = htab->tls_get_addr;
5149 if (htab->elf.dynamic_sections_created
5150 && tga != NULL
5151 && (tga->type == STT_FUNC
5152 || tga->needs_plt)
5153 && !(SYMBOL_CALLS_LOCAL (info, tga)
5154 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5155 && tga->root.type == bfd_link_hash_undefweak)))
5156 {
5157 struct plt_entry *ent;
5158 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5159 if (ent->plt.refcount > 0)
5160 break;
5161 if (ent != NULL)
5162 {
5163 tga->root.type = bfd_link_hash_indirect;
5164 tga->root.u.i.link = &opt->root;
5165 ppc_elf_copy_indirect_symbol (info, opt, tga);
5166 opt->forced_local = 0;
5167 if (opt->dynindx != -1)
5168 {
5169 /* Use __tls_get_addr_opt in dynamic relocations. */
5170 opt->dynindx = -1;
5171 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5172 opt->dynstr_index);
5173 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5174 return FALSE;
5175 }
5176 htab->tls_get_addr = opt;
5177 }
5178 }
5179 }
5180 else
5181 htab->params->no_tls_get_addr_opt = TRUE;
5182 }
5183 if (htab->plt_type == PLT_NEW
5184 && htab->plt != NULL
5185 && htab->plt->output_section != NULL)
5186 {
5187 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5188 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5189 }
5190
5191 return _bfd_elf_tls_setup (obfd, info);
5192 }
5193
5194 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5195 HASH. */
5196
5197 static bfd_boolean
5198 branch_reloc_hash_match (const bfd *ibfd,
5199 const Elf_Internal_Rela *rel,
5200 const struct elf_link_hash_entry *hash)
5201 {
5202 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5203 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5204 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5205
5206 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5207 {
5208 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5209 struct elf_link_hash_entry *h;
5210
5211 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5212 while (h->root.type == bfd_link_hash_indirect
5213 || h->root.type == bfd_link_hash_warning)
5214 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5215 if (h == hash)
5216 return TRUE;
5217 }
5218 return FALSE;
5219 }
5220
5221 /* Run through all the TLS relocs looking for optimization
5222 opportunities. */
5223
5224 bfd_boolean
5225 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5226 struct bfd_link_info *info)
5227 {
5228 bfd *ibfd;
5229 asection *sec;
5230 struct ppc_elf_link_hash_table *htab;
5231 int pass;
5232
5233 if (!bfd_link_executable (info))
5234 return TRUE;
5235
5236 htab = ppc_elf_hash_table (info);
5237 if (htab == NULL)
5238 return FALSE;
5239
5240 /* Make two passes through the relocs. First time check that tls
5241 relocs involved in setting up a tls_get_addr call are indeed
5242 followed by such a call. If they are not, don't do any tls
5243 optimization. On the second pass twiddle tls_mask flags to
5244 notify relocate_section that optimization can be done, and
5245 adjust got and plt refcounts. */
5246 for (pass = 0; pass < 2; ++pass)
5247 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5248 {
5249 Elf_Internal_Sym *locsyms = NULL;
5250 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5251 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5252
5253 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5254 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5255 {
5256 Elf_Internal_Rela *relstart, *rel, *relend;
5257 int expecting_tls_get_addr = 0;
5258
5259 /* Read the relocations. */
5260 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5261 info->keep_memory);
5262 if (relstart == NULL)
5263 return FALSE;
5264
5265 relend = relstart + sec->reloc_count;
5266 for (rel = relstart; rel < relend; rel++)
5267 {
5268 enum elf_ppc_reloc_type r_type;
5269 unsigned long r_symndx;
5270 struct elf_link_hash_entry *h = NULL;
5271 char *tls_mask;
5272 char tls_set, tls_clear;
5273 bfd_boolean is_local;
5274 bfd_signed_vma *got_count;
5275
5276 r_symndx = ELF32_R_SYM (rel->r_info);
5277 if (r_symndx >= symtab_hdr->sh_info)
5278 {
5279 struct elf_link_hash_entry **sym_hashes;
5280
5281 sym_hashes = elf_sym_hashes (ibfd);
5282 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5283 while (h->root.type == bfd_link_hash_indirect
5284 || h->root.type == bfd_link_hash_warning)
5285 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5286 }
5287
5288 is_local = FALSE;
5289 if (h == NULL
5290 || !h->def_dynamic)
5291 is_local = TRUE;
5292
5293 r_type = ELF32_R_TYPE (rel->r_info);
5294 /* If this section has old-style __tls_get_addr calls
5295 without marker relocs, then check that each
5296 __tls_get_addr call reloc is preceded by a reloc
5297 that conceivably belongs to the __tls_get_addr arg
5298 setup insn. If we don't find matching arg setup
5299 relocs, don't do any tls optimization. */
5300 if (pass == 0
5301 && sec->has_tls_get_addr_call
5302 && h != NULL
5303 && h == htab->tls_get_addr
5304 && !expecting_tls_get_addr
5305 && is_branch_reloc (r_type))
5306 {
5307 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5308 "TLS optimization disabled\n",
5309 ibfd, sec, rel->r_offset);
5310 if (elf_section_data (sec)->relocs != relstart)
5311 free (relstart);
5312 return TRUE;
5313 }
5314
5315 expecting_tls_get_addr = 0;
5316 switch (r_type)
5317 {
5318 case R_PPC_GOT_TLSLD16:
5319 case R_PPC_GOT_TLSLD16_LO:
5320 expecting_tls_get_addr = 1;
5321 /* Fall thru */
5322
5323 case R_PPC_GOT_TLSLD16_HI:
5324 case R_PPC_GOT_TLSLD16_HA:
5325 /* These relocs should never be against a symbol
5326 defined in a shared lib. Leave them alone if
5327 that turns out to be the case. */
5328 if (!is_local)
5329 continue;
5330
5331 /* LD -> LE */
5332 tls_set = 0;
5333 tls_clear = TLS_LD;
5334 break;
5335
5336 case R_PPC_GOT_TLSGD16:
5337 case R_PPC_GOT_TLSGD16_LO:
5338 expecting_tls_get_addr = 1;
5339 /* Fall thru */
5340
5341 case R_PPC_GOT_TLSGD16_HI:
5342 case R_PPC_GOT_TLSGD16_HA:
5343 if (is_local)
5344 /* GD -> LE */
5345 tls_set = 0;
5346 else
5347 /* GD -> IE */
5348 tls_set = TLS_TLS | TLS_TPRELGD;
5349 tls_clear = TLS_GD;
5350 break;
5351
5352 case R_PPC_GOT_TPREL16:
5353 case R_PPC_GOT_TPREL16_LO:
5354 case R_PPC_GOT_TPREL16_HI:
5355 case R_PPC_GOT_TPREL16_HA:
5356 if (is_local)
5357 {
5358 /* IE -> LE */
5359 tls_set = 0;
5360 tls_clear = TLS_TPREL;
5361 break;
5362 }
5363 else
5364 continue;
5365
5366 case R_PPC_TLSGD:
5367 case R_PPC_TLSLD:
5368 expecting_tls_get_addr = 2;
5369 tls_set = 0;
5370 tls_clear = 0;
5371 break;
5372
5373 default:
5374 continue;
5375 }
5376
5377 if (pass == 0)
5378 {
5379 if (!expecting_tls_get_addr
5380 || (expecting_tls_get_addr == 1
5381 && !sec->has_tls_get_addr_call))
5382 continue;
5383
5384 if (rel + 1 < relend
5385 && branch_reloc_hash_match (ibfd, rel + 1,
5386 htab->tls_get_addr))
5387 continue;
5388
5389 /* Uh oh, we didn't find the expected call. We
5390 could just mark this symbol to exclude it
5391 from tls optimization but it's safer to skip
5392 the entire optimization. */
5393 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5394 "TLS optimization disabled\n"),
5395 ibfd, sec, rel->r_offset);
5396 if (elf_section_data (sec)->relocs != relstart)
5397 free (relstart);
5398 return TRUE;
5399 }
5400
5401 if (expecting_tls_get_addr)
5402 {
5403 struct plt_entry *ent;
5404 bfd_vma addend = 0;
5405
5406 if (bfd_link_pic (info)
5407 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5408 addend = rel[1].r_addend;
5409 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5410 got2, addend);
5411 if (ent != NULL && ent->plt.refcount > 0)
5412 ent->plt.refcount -= 1;
5413
5414 if (expecting_tls_get_addr == 2)
5415 continue;
5416 }
5417
5418 if (h != NULL)
5419 {
5420 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5421 got_count = &h->got.refcount;
5422 }
5423 else
5424 {
5425 bfd_signed_vma *lgot_refs;
5426 struct plt_entry **local_plt;
5427 char *lgot_masks;
5428
5429 if (locsyms == NULL)
5430 {
5431 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5432 if (locsyms == NULL)
5433 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5434 symtab_hdr->sh_info,
5435 0, NULL, NULL, NULL);
5436 if (locsyms == NULL)
5437 {
5438 if (elf_section_data (sec)->relocs != relstart)
5439 free (relstart);
5440 return FALSE;
5441 }
5442 }
5443 lgot_refs = elf_local_got_refcounts (ibfd);
5444 if (lgot_refs == NULL)
5445 abort ();
5446 local_plt = (struct plt_entry **)
5447 (lgot_refs + symtab_hdr->sh_info);
5448 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5449 tls_mask = &lgot_masks[r_symndx];
5450 got_count = &lgot_refs[r_symndx];
5451 }
5452
5453 if (tls_set == 0)
5454 {
5455 /* We managed to get rid of a got entry. */
5456 if (*got_count > 0)
5457 *got_count -= 1;
5458 }
5459
5460 *tls_mask |= tls_set;
5461 *tls_mask &= ~tls_clear;
5462 }
5463
5464 if (elf_section_data (sec)->relocs != relstart)
5465 free (relstart);
5466 }
5467
5468 if (locsyms != NULL
5469 && (symtab_hdr->contents != (unsigned char *) locsyms))
5470 {
5471 if (!info->keep_memory)
5472 free (locsyms);
5473 else
5474 symtab_hdr->contents = (unsigned char *) locsyms;
5475 }
5476 }
5477 return TRUE;
5478 }
5479 \f
5480 /* Return true if we have dynamic relocs that apply to read-only sections. */
5481
5482 static bfd_boolean
5483 readonly_dynrelocs (struct elf_link_hash_entry *h)
5484 {
5485 struct elf_dyn_relocs *p;
5486
5487 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5488 {
5489 asection *s = p->sec->output_section;
5490
5491 if (s != NULL
5492 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5493 == (SEC_READONLY | SEC_ALLOC)))
5494 return TRUE;
5495 }
5496 return FALSE;
5497 }
5498
5499 /* Adjust a symbol defined by a dynamic object and referenced by a
5500 regular object. The current definition is in some section of the
5501 dynamic object, but we're not including those sections. We have to
5502 change the definition to something the rest of the link can
5503 understand. */
5504
5505 static bfd_boolean
5506 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5507 struct elf_link_hash_entry *h)
5508 {
5509 struct ppc_elf_link_hash_table *htab;
5510 asection *s;
5511
5512 #ifdef DEBUG
5513 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5514 h->root.root.string);
5515 #endif
5516
5517 /* Make sure we know what is going on here. */
5518 htab = ppc_elf_hash_table (info);
5519 BFD_ASSERT (htab->elf.dynobj != NULL
5520 && (h->needs_plt
5521 || h->type == STT_GNU_IFUNC
5522 || h->u.weakdef != NULL
5523 || (h->def_dynamic
5524 && h->ref_regular
5525 && !h->def_regular)));
5526
5527 /* Deal with function syms. */
5528 if (h->type == STT_FUNC
5529 || h->type == STT_GNU_IFUNC
5530 || h->needs_plt)
5531 {
5532 /* Clear procedure linkage table information for any symbol that
5533 won't need a .plt entry. */
5534 struct plt_entry *ent;
5535 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5536 if (ent->plt.refcount > 0)
5537 break;
5538 if (ent == NULL
5539 || (h->type != STT_GNU_IFUNC
5540 && (SYMBOL_CALLS_LOCAL (info, h)
5541 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5542 && h->root.type == bfd_link_hash_undefweak))))
5543 {
5544 /* A PLT entry is not required/allowed when:
5545
5546 1. We are not using ld.so; because then the PLT entry
5547 can't be set up, so we can't use one. In this case,
5548 ppc_elf_adjust_dynamic_symbol won't even be called.
5549
5550 2. GC has rendered the entry unused.
5551
5552 3. We know for certain that a call to this symbol
5553 will go to this object, or will remain undefined. */
5554 h->plt.plist = NULL;
5555 h->needs_plt = 0;
5556 h->pointer_equality_needed = 0;
5557 }
5558 else
5559 {
5560 /* Taking a function's address in a read/write section
5561 doesn't require us to define the function symbol in the
5562 executable on a plt call stub. A dynamic reloc can
5563 be used instead. */
5564 if (h->pointer_equality_needed
5565 && h->type != STT_GNU_IFUNC
5566 && !htab->is_vxworks
5567 && !ppc_elf_hash_entry (h)->has_sda_refs
5568 && !readonly_dynrelocs (h))
5569 {
5570 h->pointer_equality_needed = 0;
5571 h->non_got_ref = 0;
5572 }
5573
5574 /* After adjust_dynamic_symbol, non_got_ref set in the
5575 non-shared case means that we have allocated space in
5576 .dynbss for the symbol and thus dyn_relocs for this
5577 symbol should be discarded.
5578 If we get here we know we are making a PLT entry for this
5579 symbol, and in an executable we'd normally resolve
5580 relocations against this symbol to the PLT entry. Allow
5581 dynamic relocs if the reference is weak, and the dynamic
5582 relocs will not cause text relocation. */
5583 else if (!h->ref_regular_nonweak
5584 && h->non_got_ref
5585 && h->type != STT_GNU_IFUNC
5586 && !htab->is_vxworks
5587 && !ppc_elf_hash_entry (h)->has_sda_refs
5588 && !readonly_dynrelocs (h))
5589 h->non_got_ref = 0;
5590 }
5591 h->protected_def = 0;
5592 return TRUE;
5593 }
5594 else
5595 h->plt.plist = NULL;
5596
5597 /* If this is a weak symbol, and there is a real definition, the
5598 processor independent code will have arranged for us to see the
5599 real definition first, and we can just use the same value. */
5600 if (h->u.weakdef != NULL)
5601 {
5602 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5603 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5604 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5605 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5606 if (ELIMINATE_COPY_RELOCS)
5607 h->non_got_ref = h->u.weakdef->non_got_ref;
5608 return TRUE;
5609 }
5610
5611 /* This is a reference to a symbol defined by a dynamic object which
5612 is not a function. */
5613
5614 /* If we are creating a shared library, we must presume that the
5615 only references to the symbol are via the global offset table.
5616 For such cases we need not do anything here; the relocations will
5617 be handled correctly by relocate_section. */
5618 if (bfd_link_pic (info))
5619 {
5620 h->protected_def = 0;
5621 return TRUE;
5622 }
5623
5624 /* If there are no references to this symbol that do not use the
5625 GOT, we don't need to generate a copy reloc. */
5626 if (!h->non_got_ref)
5627 {
5628 h->protected_def = 0;
5629 return TRUE;
5630 }
5631
5632 /* Protected variables do not work with .dynbss. The copy in
5633 .dynbss won't be used by the shared library with the protected
5634 definition for the variable. Editing to PIC, or text relocations
5635 are preferable to an incorrect program. */
5636 if (h->protected_def)
5637 {
5638 if (ELIMINATE_COPY_RELOCS
5639 && ppc_elf_hash_entry (h)->has_addr16_ha
5640 && ppc_elf_hash_entry (h)->has_addr16_lo
5641 && htab->params->pic_fixup == 0
5642 && info->disable_target_specific_optimizations <= 1)
5643 htab->params->pic_fixup = 1;
5644 h->non_got_ref = 0;
5645 return TRUE;
5646 }
5647
5648 /* If -z nocopyreloc was given, we won't generate them either. */
5649 if (info->nocopyreloc)
5650 {
5651 h->non_got_ref = 0;
5652 return TRUE;
5653 }
5654
5655 /* If we didn't find any dynamic relocs in read-only sections, then
5656 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5657 We can't do this if there are any small data relocations. This
5658 doesn't work on VxWorks, where we can not have dynamic
5659 relocations (other than copy and jump slot relocations) in an
5660 executable. */
5661 if (ELIMINATE_COPY_RELOCS
5662 && !ppc_elf_hash_entry (h)->has_sda_refs
5663 && !htab->is_vxworks
5664 && !h->def_regular
5665 && !readonly_dynrelocs (h))
5666 {
5667 h->non_got_ref = 0;
5668 return TRUE;
5669 }
5670
5671 /* We must allocate the symbol in our .dynbss section, which will
5672 become part of the .bss section of the executable. There will be
5673 an entry for this symbol in the .dynsym section. The dynamic
5674 object will contain position independent code, so all references
5675 from the dynamic object to this symbol will go through the global
5676 offset table. The dynamic linker will use the .dynsym entry to
5677 determine the address it must put in the global offset table, so
5678 both the dynamic object and the regular object will refer to the
5679 same memory location for the variable.
5680
5681 Of course, if the symbol is referenced using SDAREL relocs, we
5682 must instead allocate it in .sbss. */
5683
5684 if (ppc_elf_hash_entry (h)->has_sda_refs)
5685 s = htab->dynsbss;
5686 else
5687 s = htab->dynbss;
5688 BFD_ASSERT (s != NULL);
5689
5690 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5691 copy the initial value out of the dynamic object and into the
5692 runtime process image. We need to remember the offset into the
5693 .rela.bss section we are going to use. */
5694 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5695 {
5696 asection *srel;
5697
5698 if (ppc_elf_hash_entry (h)->has_sda_refs)
5699 srel = htab->relsbss;
5700 else
5701 srel = htab->relbss;
5702 BFD_ASSERT (srel != NULL);
5703 srel->size += sizeof (Elf32_External_Rela);
5704 h->needs_copy = 1;
5705 }
5706
5707 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5708 }
5709 \f
5710 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5711 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5712 specifying the addend on the plt relocation. For -fpic code, the sym
5713 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5714 xxxxxxxx.got2.plt_pic32.<callee>. */
5715
5716 static bfd_boolean
5717 add_stub_sym (struct plt_entry *ent,
5718 struct elf_link_hash_entry *h,
5719 struct bfd_link_info *info)
5720 {
5721 struct elf_link_hash_entry *sh;
5722 size_t len1, len2, len3;
5723 char *name;
5724 const char *stub;
5725 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5726
5727 if (bfd_link_pic (info))
5728 stub = ".plt_pic32.";
5729 else
5730 stub = ".plt_call32.";
5731
5732 len1 = strlen (h->root.root.string);
5733 len2 = strlen (stub);
5734 len3 = 0;
5735 if (ent->sec)
5736 len3 = strlen (ent->sec->name);
5737 name = bfd_malloc (len1 + len2 + len3 + 9);
5738 if (name == NULL)
5739 return FALSE;
5740 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5741 if (ent->sec)
5742 memcpy (name + 8, ent->sec->name, len3);
5743 memcpy (name + 8 + len3, stub, len2);
5744 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5745 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5746 if (sh == NULL)
5747 return FALSE;
5748 if (sh->root.type == bfd_link_hash_new)
5749 {
5750 sh->root.type = bfd_link_hash_defined;
5751 sh->root.u.def.section = htab->glink;
5752 sh->root.u.def.value = ent->glink_offset;
5753 sh->ref_regular = 1;
5754 sh->def_regular = 1;
5755 sh->ref_regular_nonweak = 1;
5756 sh->forced_local = 1;
5757 sh->non_elf = 0;
5758 sh->root.linker_def = 1;
5759 }
5760 return TRUE;
5761 }
5762
5763 /* Allocate NEED contiguous space in .got, and return the offset.
5764 Handles allocation of the got header when crossing 32k. */
5765
5766 static bfd_vma
5767 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5768 {
5769 bfd_vma where;
5770 unsigned int max_before_header;
5771
5772 if (htab->plt_type == PLT_VXWORKS)
5773 {
5774 where = htab->got->size;
5775 htab->got->size += need;
5776 }
5777 else
5778 {
5779 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5780 if (need <= htab->got_gap)
5781 {
5782 where = max_before_header - htab->got_gap;
5783 htab->got_gap -= need;
5784 }
5785 else
5786 {
5787 if (htab->got->size + need > max_before_header
5788 && htab->got->size <= max_before_header)
5789 {
5790 htab->got_gap = max_before_header - htab->got->size;
5791 htab->got->size = max_before_header + htab->got_header_size;
5792 }
5793 where = htab->got->size;
5794 htab->got->size += need;
5795 }
5796 }
5797 return where;
5798 }
5799
5800 /* Allocate space in associated reloc sections for dynamic relocs. */
5801
5802 static bfd_boolean
5803 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5804 {
5805 struct bfd_link_info *info = inf;
5806 struct ppc_elf_link_hash_entry *eh;
5807 struct ppc_elf_link_hash_table *htab;
5808 struct elf_dyn_relocs *p;
5809
5810 if (h->root.type == bfd_link_hash_indirect)
5811 return TRUE;
5812
5813 htab = ppc_elf_hash_table (info);
5814 if (htab->elf.dynamic_sections_created
5815 || h->type == STT_GNU_IFUNC)
5816 {
5817 struct plt_entry *ent;
5818 bfd_boolean doneone = FALSE;
5819 bfd_vma plt_offset = 0, glink_offset = 0;
5820 bfd_boolean dyn;
5821
5822 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5823 if (ent->plt.refcount > 0)
5824 {
5825 /* Make sure this symbol is output as a dynamic symbol. */
5826 if (h->dynindx == -1
5827 && !h->forced_local
5828 && !h->def_regular
5829 && htab->elf.dynamic_sections_created)
5830 {
5831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5832 return FALSE;
5833 }
5834
5835 dyn = htab->elf.dynamic_sections_created;
5836 if (bfd_link_pic (info)
5837 || h->type == STT_GNU_IFUNC
5838 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5839 {
5840 asection *s = htab->plt;
5841 if (!dyn || h->dynindx == -1)
5842 s = htab->iplt;
5843
5844 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5845 {
5846 if (!doneone)
5847 {
5848 plt_offset = s->size;
5849 s->size += 4;
5850 }
5851 ent->plt.offset = plt_offset;
5852
5853 s = htab->glink;
5854 if (!doneone || bfd_link_pic (info))
5855 {
5856 glink_offset = s->size;
5857 s->size += GLINK_ENTRY_SIZE;
5858 if (h == htab->tls_get_addr
5859 && !htab->params->no_tls_get_addr_opt)
5860 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5861 }
5862 if (!doneone
5863 && !bfd_link_pic (info)
5864 && h->def_dynamic
5865 && !h->def_regular)
5866 {
5867 h->root.u.def.section = s;
5868 h->root.u.def.value = glink_offset;
5869 }
5870 ent->glink_offset = glink_offset;
5871
5872 if (htab->params->emit_stub_syms
5873 && !add_stub_sym (ent, h, info))
5874 return FALSE;
5875 }
5876 else
5877 {
5878 if (!doneone)
5879 {
5880 /* If this is the first .plt entry, make room
5881 for the special first entry. */
5882 if (s->size == 0)
5883 s->size += htab->plt_initial_entry_size;
5884
5885 /* The PowerPC PLT is actually composed of two
5886 parts, the first part is 2 words (for a load
5887 and a jump), and then there is a remaining
5888 word available at the end. */
5889 plt_offset = (htab->plt_initial_entry_size
5890 + (htab->plt_slot_size
5891 * ((s->size
5892 - htab->plt_initial_entry_size)
5893 / htab->plt_entry_size)));
5894
5895 /* If this symbol is not defined in a regular
5896 file, and we are not generating a shared
5897 library, then set the symbol to this location
5898 in the .plt. This is to avoid text
5899 relocations, and is required to make
5900 function pointers compare as equal between
5901 the normal executable and the shared library. */
5902 if (! bfd_link_pic (info)
5903 && h->def_dynamic
5904 && !h->def_regular)
5905 {
5906 h->root.u.def.section = s;
5907 h->root.u.def.value = plt_offset;
5908 }
5909
5910 /* Make room for this entry. */
5911 s->size += htab->plt_entry_size;
5912 /* After the 8192nd entry, room for two entries
5913 is allocated. */
5914 if (htab->plt_type == PLT_OLD
5915 && (s->size - htab->plt_initial_entry_size)
5916 / htab->plt_entry_size
5917 > PLT_NUM_SINGLE_ENTRIES)
5918 s->size += htab->plt_entry_size;
5919 }
5920 ent->plt.offset = plt_offset;
5921 }
5922
5923 /* We also need to make an entry in the .rela.plt section. */
5924 if (!doneone)
5925 {
5926 if (!htab->elf.dynamic_sections_created
5927 || h->dynindx == -1)
5928 htab->reliplt->size += sizeof (Elf32_External_Rela);
5929 else
5930 {
5931 htab->relplt->size += sizeof (Elf32_External_Rela);
5932
5933 if (htab->plt_type == PLT_VXWORKS)
5934 {
5935 /* Allocate space for the unloaded relocations. */
5936 if (!bfd_link_pic (info)
5937 && htab->elf.dynamic_sections_created)
5938 {
5939 if (ent->plt.offset
5940 == (bfd_vma) htab->plt_initial_entry_size)
5941 {
5942 htab->srelplt2->size
5943 += (sizeof (Elf32_External_Rela)
5944 * VXWORKS_PLTRESOLVE_RELOCS);
5945 }
5946
5947 htab->srelplt2->size
5948 += (sizeof (Elf32_External_Rela)
5949 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5950 }
5951
5952 /* Every PLT entry has an associated GOT entry in
5953 .got.plt. */
5954 htab->sgotplt->size += 4;
5955 }
5956 }
5957 doneone = TRUE;
5958 }
5959 }
5960 else
5961 ent->plt.offset = (bfd_vma) -1;
5962 }
5963 else
5964 ent->plt.offset = (bfd_vma) -1;
5965
5966 if (!doneone)
5967 {
5968 h->plt.plist = NULL;
5969 h->needs_plt = 0;
5970 }
5971 }
5972 else
5973 {
5974 h->plt.plist = NULL;
5975 h->needs_plt = 0;
5976 }
5977
5978 eh = (struct ppc_elf_link_hash_entry *) h;
5979 if (eh->elf.got.refcount > 0
5980 || (ELIMINATE_COPY_RELOCS
5981 && !eh->elf.def_regular
5982 && eh->elf.protected_def
5983 && eh->has_addr16_ha
5984 && eh->has_addr16_lo
5985 && htab->params->pic_fixup > 0))
5986 {
5987 bfd_boolean dyn;
5988 unsigned int need;
5989
5990 /* Make sure this symbol is output as a dynamic symbol. */
5991 if (eh->elf.dynindx == -1
5992 && !eh->elf.forced_local
5993 && eh->elf.type != STT_GNU_IFUNC
5994 && htab->elf.dynamic_sections_created)
5995 {
5996 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5997 return FALSE;
5998 }
5999
6000 need = 0;
6001 if ((eh->tls_mask & TLS_TLS) != 0)
6002 {
6003 if ((eh->tls_mask & TLS_LD) != 0)
6004 {
6005 if (!eh->elf.def_dynamic)
6006 /* We'll just use htab->tlsld_got.offset. This should
6007 always be the case. It's a little odd if we have
6008 a local dynamic reloc against a non-local symbol. */
6009 htab->tlsld_got.refcount += 1;
6010 else
6011 need += 8;
6012 }
6013 if ((eh->tls_mask & TLS_GD) != 0)
6014 need += 8;
6015 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6016 need += 4;
6017 if ((eh->tls_mask & TLS_DTPREL) != 0)
6018 need += 4;
6019 }
6020 else
6021 need += 4;
6022 if (need == 0)
6023 eh->elf.got.offset = (bfd_vma) -1;
6024 else
6025 {
6026 eh->elf.got.offset = allocate_got (htab, need);
6027 dyn = htab->elf.dynamic_sections_created;
6028 if ((bfd_link_pic (info)
6029 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6030 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6031 || eh->elf.root.type != bfd_link_hash_undefweak))
6032 {
6033 asection *rsec = htab->relgot;
6034
6035 if (eh->elf.type == STT_GNU_IFUNC)
6036 rsec = htab->reliplt;
6037 /* All the entries we allocated need relocs.
6038 Except LD only needs one. */
6039 if ((eh->tls_mask & TLS_LD) != 0
6040 && eh->elf.def_dynamic)
6041 need -= 4;
6042 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6043 }
6044 }
6045 }
6046 else
6047 eh->elf.got.offset = (bfd_vma) -1;
6048
6049 if (eh->dyn_relocs == NULL
6050 || !htab->elf.dynamic_sections_created)
6051 return TRUE;
6052
6053 /* In the shared -Bsymbolic case, discard space allocated for
6054 dynamic pc-relative relocs against symbols which turn out to be
6055 defined in regular objects. For the normal shared case, discard
6056 space for relocs that have become local due to symbol visibility
6057 changes. */
6058
6059 if (bfd_link_pic (info))
6060 {
6061 /* Relocs that use pc_count are those that appear on a call insn,
6062 or certain REL relocs (see must_be_dyn_reloc) that can be
6063 generated via assembly. We want calls to protected symbols to
6064 resolve directly to the function rather than going via the plt.
6065 If people want function pointer comparisons to work as expected
6066 then they should avoid writing weird assembly. */
6067 if (SYMBOL_CALLS_LOCAL (info, h))
6068 {
6069 struct elf_dyn_relocs **pp;
6070
6071 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6072 {
6073 p->count -= p->pc_count;
6074 p->pc_count = 0;
6075 if (p->count == 0)
6076 *pp = p->next;
6077 else
6078 pp = &p->next;
6079 }
6080 }
6081
6082 if (htab->is_vxworks)
6083 {
6084 struct elf_dyn_relocs **pp;
6085
6086 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6087 {
6088 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6089 *pp = p->next;
6090 else
6091 pp = &p->next;
6092 }
6093 }
6094
6095 /* Discard relocs on undefined symbols that must be local. */
6096 if (eh->dyn_relocs != NULL
6097 && h->root.type == bfd_link_hash_undefined
6098 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6099 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6100 eh->dyn_relocs = NULL;
6101
6102 /* Also discard relocs on undefined weak syms with non-default
6103 visibility. */
6104 if (eh->dyn_relocs != NULL
6105 && h->root.type == bfd_link_hash_undefweak)
6106 {
6107 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6108 eh->dyn_relocs = NULL;
6109
6110 /* Make sure undefined weak symbols are output as a dynamic
6111 symbol in PIEs. */
6112 else if (h->dynindx == -1
6113 && !h->forced_local
6114 && !h->def_regular)
6115 {
6116 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6117 return FALSE;
6118 }
6119 }
6120 }
6121 else if (ELIMINATE_COPY_RELOCS)
6122 {
6123 /* For the non-shared case, discard space for relocs against
6124 symbols which turn out to need copy relocs or are not
6125 dynamic. */
6126
6127 if (!h->non_got_ref
6128 && !h->def_regular
6129 && !(h->protected_def
6130 && eh->has_addr16_ha
6131 && eh->has_addr16_lo
6132 && htab->params->pic_fixup > 0))
6133 {
6134 /* Make sure this symbol is output as a dynamic symbol.
6135 Undefined weak syms won't yet be marked as dynamic. */
6136 if (h->dynindx == -1
6137 && !h->forced_local)
6138 {
6139 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6140 return FALSE;
6141 }
6142
6143 /* If that succeeded, we know we'll be keeping all the
6144 relocs. */
6145 if (h->dynindx != -1)
6146 goto keep;
6147 }
6148
6149 eh->dyn_relocs = NULL;
6150
6151 keep: ;
6152 }
6153
6154 /* Finally, allocate space. */
6155 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6156 {
6157 asection *sreloc = elf_section_data (p->sec)->sreloc;
6158 if (eh->elf.type == STT_GNU_IFUNC)
6159 sreloc = htab->reliplt;
6160 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6161 }
6162
6163 return TRUE;
6164 }
6165
6166 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6167 read-only sections. */
6168
6169 static bfd_boolean
6170 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6171 {
6172 if (h->root.type == bfd_link_hash_indirect)
6173 return TRUE;
6174
6175 if (readonly_dynrelocs (h))
6176 {
6177 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6178
6179 /* Not an error, just cut short the traversal. */
6180 return FALSE;
6181 }
6182 return TRUE;
6183 }
6184
6185 static const unsigned char glink_eh_frame_cie[] =
6186 {
6187 0, 0, 0, 16, /* length. */
6188 0, 0, 0, 0, /* id. */
6189 1, /* CIE version. */
6190 'z', 'R', 0, /* Augmentation string. */
6191 4, /* Code alignment. */
6192 0x7c, /* Data alignment. */
6193 65, /* RA reg. */
6194 1, /* Augmentation size. */
6195 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6196 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6197 };
6198
6199 /* Set the sizes of the dynamic sections. */
6200
6201 static bfd_boolean
6202 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6203 struct bfd_link_info *info)
6204 {
6205 struct ppc_elf_link_hash_table *htab;
6206 asection *s;
6207 bfd_boolean relocs;
6208 bfd *ibfd;
6209
6210 #ifdef DEBUG
6211 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6212 #endif
6213
6214 htab = ppc_elf_hash_table (info);
6215 BFD_ASSERT (htab->elf.dynobj != NULL);
6216
6217 if (elf_hash_table (info)->dynamic_sections_created)
6218 {
6219 /* Set the contents of the .interp section to the interpreter. */
6220 if (bfd_link_executable (info) && !info->nointerp)
6221 {
6222 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6223 BFD_ASSERT (s != NULL);
6224 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6225 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6226 }
6227 }
6228
6229 if (htab->plt_type == PLT_OLD)
6230 htab->got_header_size = 16;
6231 else if (htab->plt_type == PLT_NEW)
6232 htab->got_header_size = 12;
6233
6234 /* Set up .got offsets for local syms, and space for local dynamic
6235 relocs. */
6236 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6237 {
6238 bfd_signed_vma *local_got;
6239 bfd_signed_vma *end_local_got;
6240 struct plt_entry **local_plt;
6241 struct plt_entry **end_local_plt;
6242 char *lgot_masks;
6243 bfd_size_type locsymcount;
6244 Elf_Internal_Shdr *symtab_hdr;
6245
6246 if (!is_ppc_elf (ibfd))
6247 continue;
6248
6249 for (s = ibfd->sections; s != NULL; s = s->next)
6250 {
6251 struct ppc_dyn_relocs *p;
6252
6253 for (p = ((struct ppc_dyn_relocs *)
6254 elf_section_data (s)->local_dynrel);
6255 p != NULL;
6256 p = p->next)
6257 {
6258 if (!bfd_is_abs_section (p->sec)
6259 && bfd_is_abs_section (p->sec->output_section))
6260 {
6261 /* Input section has been discarded, either because
6262 it is a copy of a linkonce section or due to
6263 linker script /DISCARD/, so we'll be discarding
6264 the relocs too. */
6265 }
6266 else if (htab->is_vxworks
6267 && strcmp (p->sec->output_section->name,
6268 ".tls_vars") == 0)
6269 {
6270 /* Relocations in vxworks .tls_vars sections are
6271 handled specially by the loader. */
6272 }
6273 else if (p->count != 0)
6274 {
6275 asection *sreloc = elf_section_data (p->sec)->sreloc;
6276 if (p->ifunc)
6277 sreloc = htab->reliplt;
6278 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6279 if ((p->sec->output_section->flags
6280 & (SEC_READONLY | SEC_ALLOC))
6281 == (SEC_READONLY | SEC_ALLOC))
6282 info->flags |= DF_TEXTREL;
6283 }
6284 }
6285 }
6286
6287 local_got = elf_local_got_refcounts (ibfd);
6288 if (!local_got)
6289 continue;
6290
6291 symtab_hdr = &elf_symtab_hdr (ibfd);
6292 locsymcount = symtab_hdr->sh_info;
6293 end_local_got = local_got + locsymcount;
6294 local_plt = (struct plt_entry **) end_local_got;
6295 end_local_plt = local_plt + locsymcount;
6296 lgot_masks = (char *) end_local_plt;
6297
6298 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6299 if (*local_got > 0)
6300 {
6301 unsigned int need = 0;
6302 if ((*lgot_masks & TLS_TLS) != 0)
6303 {
6304 if ((*lgot_masks & TLS_GD) != 0)
6305 need += 8;
6306 if ((*lgot_masks & TLS_LD) != 0)
6307 htab->tlsld_got.refcount += 1;
6308 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6309 need += 4;
6310 if ((*lgot_masks & TLS_DTPREL) != 0)
6311 need += 4;
6312 }
6313 else
6314 need += 4;
6315 if (need == 0)
6316 *local_got = (bfd_vma) -1;
6317 else
6318 {
6319 *local_got = allocate_got (htab, need);
6320 if (bfd_link_pic (info))
6321 {
6322 asection *srel = htab->relgot;
6323 if ((*lgot_masks & PLT_IFUNC) != 0)
6324 srel = htab->reliplt;
6325 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6326 }
6327 }
6328 }
6329 else
6330 *local_got = (bfd_vma) -1;
6331
6332 if (htab->is_vxworks)
6333 continue;
6334
6335 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6336 for (; local_plt < end_local_plt; ++local_plt)
6337 {
6338 struct plt_entry *ent;
6339 bfd_boolean doneone = FALSE;
6340 bfd_vma plt_offset = 0, glink_offset = 0;
6341
6342 for (ent = *local_plt; ent != NULL; ent = ent->next)
6343 if (ent->plt.refcount > 0)
6344 {
6345 s = htab->iplt;
6346
6347 if (!doneone)
6348 {
6349 plt_offset = s->size;
6350 s->size += 4;
6351 }
6352 ent->plt.offset = plt_offset;
6353
6354 s = htab->glink;
6355 if (!doneone || bfd_link_pic (info))
6356 {
6357 glink_offset = s->size;
6358 s->size += GLINK_ENTRY_SIZE;
6359 }
6360 ent->glink_offset = glink_offset;
6361
6362 if (!doneone)
6363 {
6364 htab->reliplt->size += sizeof (Elf32_External_Rela);
6365 doneone = TRUE;
6366 }
6367 }
6368 else
6369 ent->plt.offset = (bfd_vma) -1;
6370 }
6371 }
6372
6373 /* Allocate space for global sym dynamic relocs. */
6374 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6375
6376 if (htab->tlsld_got.refcount > 0)
6377 {
6378 htab->tlsld_got.offset = allocate_got (htab, 8);
6379 if (bfd_link_pic (info))
6380 htab->relgot->size += sizeof (Elf32_External_Rela);
6381 }
6382 else
6383 htab->tlsld_got.offset = (bfd_vma) -1;
6384
6385 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6386 {
6387 unsigned int g_o_t = 32768;
6388
6389 /* If we haven't allocated the header, do so now. When we get here,
6390 for old plt/got the got size will be 0 to 32764 (not allocated),
6391 or 32780 to 65536 (header allocated). For new plt/got, the
6392 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6393 if (htab->got->size <= 32768)
6394 {
6395 g_o_t = htab->got->size;
6396 if (htab->plt_type == PLT_OLD)
6397 g_o_t += 4;
6398 htab->got->size += htab->got_header_size;
6399 }
6400
6401 htab->elf.hgot->root.u.def.value = g_o_t;
6402 }
6403 if (bfd_link_pic (info))
6404 {
6405 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6406
6407 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6408 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6409 }
6410 if (info->emitrelocations)
6411 {
6412 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6413
6414 if (sda != NULL && sda->ref_regular)
6415 sda->root.u.def.section->flags |= SEC_KEEP;
6416 sda = htab->sdata[1].sym;
6417 if (sda != NULL && sda->ref_regular)
6418 sda->root.u.def.section->flags |= SEC_KEEP;
6419 }
6420
6421 if (htab->glink != NULL
6422 && htab->glink->size != 0
6423 && htab->elf.dynamic_sections_created)
6424 {
6425 htab->glink_pltresolve = htab->glink->size;
6426 /* Space for the branch table. */
6427 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6428 /* Pad out to align the start of PLTresolve. */
6429 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6430 ? 63 : 15);
6431 htab->glink->size += GLINK_PLTRESOLVE;
6432
6433 if (htab->params->emit_stub_syms)
6434 {
6435 struct elf_link_hash_entry *sh;
6436 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6437 TRUE, FALSE, FALSE);
6438 if (sh == NULL)
6439 return FALSE;
6440 if (sh->root.type == bfd_link_hash_new)
6441 {
6442 sh->root.type = bfd_link_hash_defined;
6443 sh->root.u.def.section = htab->glink;
6444 sh->root.u.def.value = htab->glink_pltresolve;
6445 sh->ref_regular = 1;
6446 sh->def_regular = 1;
6447 sh->ref_regular_nonweak = 1;
6448 sh->forced_local = 1;
6449 sh->non_elf = 0;
6450 sh->root.linker_def = 1;
6451 }
6452 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6453 TRUE, FALSE, FALSE);
6454 if (sh == NULL)
6455 return FALSE;
6456 if (sh->root.type == bfd_link_hash_new)
6457 {
6458 sh->root.type = bfd_link_hash_defined;
6459 sh->root.u.def.section = htab->glink;
6460 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6461 sh->ref_regular = 1;
6462 sh->def_regular = 1;
6463 sh->ref_regular_nonweak = 1;
6464 sh->forced_local = 1;
6465 sh->non_elf = 0;
6466 sh->root.linker_def = 1;
6467 }
6468 }
6469 }
6470
6471 if (htab->glink != NULL
6472 && htab->glink->size != 0
6473 && htab->glink_eh_frame != NULL
6474 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6475 && _bfd_elf_eh_frame_present (info))
6476 {
6477 s = htab->glink_eh_frame;
6478 s->size = sizeof (glink_eh_frame_cie) + 20;
6479 if (bfd_link_pic (info))
6480 {
6481 s->size += 4;
6482 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6483 s->size += 4;
6484 }
6485 }
6486
6487 /* We've now determined the sizes of the various dynamic sections.
6488 Allocate memory for them. */
6489 relocs = FALSE;
6490 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6491 {
6492 bfd_boolean strip_section = TRUE;
6493
6494 if ((s->flags & SEC_LINKER_CREATED) == 0)
6495 continue;
6496
6497 if (s == htab->plt
6498 || s == htab->got)
6499 {
6500 /* We'd like to strip these sections if they aren't needed, but if
6501 we've exported dynamic symbols from them we must leave them.
6502 It's too late to tell BFD to get rid of the symbols. */
6503 if (htab->elf.hplt != NULL)
6504 strip_section = FALSE;
6505 /* Strip this section if we don't need it; see the
6506 comment below. */
6507 }
6508 else if (s == htab->iplt
6509 || s == htab->glink
6510 || s == htab->glink_eh_frame
6511 || s == htab->sgotplt
6512 || s == htab->sbss
6513 || s == htab->dynbss
6514 || s == htab->dynsbss)
6515 {
6516 /* Strip these too. */
6517 }
6518 else if (s == htab->sdata[0].section
6519 || s == htab->sdata[1].section)
6520 {
6521 strip_section = (s->flags & SEC_KEEP) == 0;
6522 }
6523 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6524 ".rela"))
6525 {
6526 if (s->size != 0)
6527 {
6528 /* Remember whether there are any relocation sections. */
6529 relocs = TRUE;
6530
6531 /* We use the reloc_count field as a counter if we need
6532 to copy relocs into the output file. */
6533 s->reloc_count = 0;
6534 }
6535 }
6536 else
6537 {
6538 /* It's not one of our sections, so don't allocate space. */
6539 continue;
6540 }
6541
6542 if (s->size == 0 && strip_section)
6543 {
6544 /* If we don't need this section, strip it from the
6545 output file. This is mostly to handle .rela.bss and
6546 .rela.plt. We must create both sections in
6547 create_dynamic_sections, because they must be created
6548 before the linker maps input sections to output
6549 sections. The linker does that before
6550 adjust_dynamic_symbol is called, and it is that
6551 function which decides whether anything needs to go
6552 into these sections. */
6553 s->flags |= SEC_EXCLUDE;
6554 continue;
6555 }
6556
6557 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6558 continue;
6559
6560 /* Allocate memory for the section contents. */
6561 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6562 if (s->contents == NULL)
6563 return FALSE;
6564 }
6565
6566 if (htab->elf.dynamic_sections_created)
6567 {
6568 /* Add some entries to the .dynamic section. We fill in the
6569 values later, in ppc_elf_finish_dynamic_sections, but we
6570 must add the entries now so that we get the correct size for
6571 the .dynamic section. The DT_DEBUG entry is filled in by the
6572 dynamic linker and used by the debugger. */
6573 #define add_dynamic_entry(TAG, VAL) \
6574 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6575
6576 if (bfd_link_executable (info))
6577 {
6578 if (!add_dynamic_entry (DT_DEBUG, 0))
6579 return FALSE;
6580 }
6581
6582 if (htab->plt != NULL && htab->plt->size != 0)
6583 {
6584 if (!add_dynamic_entry (DT_PLTGOT, 0)
6585 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6586 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6587 || !add_dynamic_entry (DT_JMPREL, 0))
6588 return FALSE;
6589 }
6590
6591 if (htab->plt_type == PLT_NEW
6592 && htab->glink != NULL
6593 && htab->glink->size != 0)
6594 {
6595 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6596 return FALSE;
6597 if (!htab->params->no_tls_get_addr_opt
6598 && htab->tls_get_addr != NULL
6599 && htab->tls_get_addr->plt.plist != NULL
6600 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6601 return FALSE;
6602 }
6603
6604 if (relocs)
6605 {
6606 if (!add_dynamic_entry (DT_RELA, 0)
6607 || !add_dynamic_entry (DT_RELASZ, 0)
6608 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6609 return FALSE;
6610 }
6611
6612 /* If any dynamic relocs apply to a read-only section, then we
6613 need a DT_TEXTREL entry. */
6614 if ((info->flags & DF_TEXTREL) == 0)
6615 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6616 info);
6617
6618 if ((info->flags & DF_TEXTREL) != 0)
6619 {
6620 if (!add_dynamic_entry (DT_TEXTREL, 0))
6621 return FALSE;
6622 }
6623 if (htab->is_vxworks
6624 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6625 return FALSE;
6626 }
6627 #undef add_dynamic_entry
6628
6629 if (htab->glink_eh_frame != NULL
6630 && htab->glink_eh_frame->contents != NULL)
6631 {
6632 unsigned char *p = htab->glink_eh_frame->contents;
6633 bfd_vma val;
6634
6635 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6636 /* CIE length (rewrite in case little-endian). */
6637 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6638 p += sizeof (glink_eh_frame_cie);
6639 /* FDE length. */
6640 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6641 bfd_put_32 (htab->elf.dynobj, val, p);
6642 p += 4;
6643 /* CIE pointer. */
6644 val = p - htab->glink_eh_frame->contents;
6645 bfd_put_32 (htab->elf.dynobj, val, p);
6646 p += 4;
6647 /* Offset to .glink. Set later. */
6648 p += 4;
6649 /* .glink size. */
6650 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6651 p += 4;
6652 /* Augmentation. */
6653 p += 1;
6654
6655 if (bfd_link_pic (info)
6656 && htab->elf.dynamic_sections_created)
6657 {
6658 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6659 if (adv < 64)
6660 *p++ = DW_CFA_advance_loc + adv;
6661 else if (adv < 256)
6662 {
6663 *p++ = DW_CFA_advance_loc1;
6664 *p++ = adv;
6665 }
6666 else if (adv < 65536)
6667 {
6668 *p++ = DW_CFA_advance_loc2;
6669 bfd_put_16 (htab->elf.dynobj, adv, p);
6670 p += 2;
6671 }
6672 else
6673 {
6674 *p++ = DW_CFA_advance_loc4;
6675 bfd_put_32 (htab->elf.dynobj, adv, p);
6676 p += 4;
6677 }
6678 *p++ = DW_CFA_register;
6679 *p++ = 65;
6680 p++;
6681 *p++ = DW_CFA_advance_loc + 4;
6682 *p++ = DW_CFA_restore_extended;
6683 *p++ = 65;
6684 }
6685 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6686 == htab->glink_eh_frame->size);
6687 }
6688
6689 return TRUE;
6690 }
6691
6692 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6693 if it looks like nothing is using them. */
6694
6695 static void
6696 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6697 {
6698 struct elf_link_hash_entry *sda = lsect->sym;
6699
6700 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6701 {
6702 asection *s;
6703
6704 s = bfd_get_section_by_name (output_bfd, lsect->name);
6705 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6706 {
6707 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6708 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6709 {
6710 sda->def_regular = 0;
6711 /* This is somewhat magic. See elf_link_output_extsym. */
6712 sda->ref_dynamic = 1;
6713 sda->forced_local = 0;
6714 }
6715 }
6716 }
6717 }
6718
6719 void
6720 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6721 {
6722 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6723
6724 if (htab != NULL)
6725 {
6726 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6727 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6728 }
6729 }
6730
6731
6732 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6733
6734 static bfd_boolean
6735 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6736 {
6737 if (h->plt.plist != NULL
6738 && !h->def_regular
6739 && (!h->pointer_equality_needed
6740 || !h->ref_regular_nonweak))
6741 return FALSE;
6742
6743 return _bfd_elf_hash_symbol (h);
6744 }
6745 \f
6746 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6747
6748 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6749 used for some functions that are allowed to break the ABI). */
6750 static const int shared_stub_entry[] =
6751 {
6752 0x7c0802a6, /* mflr 0 */
6753 0x429f0005, /* bcl 20, 31, .Lxxx */
6754 0x7d8802a6, /* mflr 12 */
6755 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6756 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6757 0x7c0803a6, /* mtlr 0 */
6758 0x7d8903a6, /* mtctr 12 */
6759 0x4e800420, /* bctr */
6760 };
6761
6762 static const int stub_entry[] =
6763 {
6764 0x3d800000, /* lis 12,xxx@ha */
6765 0x398c0000, /* addi 12,12,xxx@l */
6766 0x7d8903a6, /* mtctr 12 */
6767 0x4e800420, /* bctr */
6768 };
6769
6770 struct ppc_elf_relax_info
6771 {
6772 unsigned int workaround_size;
6773 unsigned int picfixup_size;
6774 };
6775
6776 /* This function implements long branch trampolines, and the ppc476
6777 icache bug workaround. Any section needing trampolines or patch
6778 space for the workaround has its size extended so that we can
6779 add trampolines at the end of the section. */
6780
6781 static bfd_boolean
6782 ppc_elf_relax_section (bfd *abfd,
6783 asection *isec,
6784 struct bfd_link_info *link_info,
6785 bfd_boolean *again)
6786 {
6787 struct one_branch_fixup
6788 {
6789 struct one_branch_fixup *next;
6790 asection *tsec;
6791 /* Final link, can use the symbol offset. For a
6792 relocatable link we use the symbol's index. */
6793 bfd_vma toff;
6794 bfd_vma trampoff;
6795 };
6796
6797 Elf_Internal_Shdr *symtab_hdr;
6798 bfd_byte *contents = NULL;
6799 Elf_Internal_Sym *isymbuf = NULL;
6800 Elf_Internal_Rela *internal_relocs = NULL;
6801 Elf_Internal_Rela *irel, *irelend = NULL;
6802 struct one_branch_fixup *branch_fixups = NULL;
6803 struct ppc_elf_relax_info *relax_info = NULL;
6804 unsigned changes = 0;
6805 bfd_boolean workaround_change;
6806 struct ppc_elf_link_hash_table *htab;
6807 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6808 asection *got2;
6809 bfd_boolean maybe_pasted;
6810
6811 *again = FALSE;
6812
6813 /* No need to do anything with non-alloc or non-code sections. */
6814 if ((isec->flags & SEC_ALLOC) == 0
6815 || (isec->flags & SEC_CODE) == 0
6816 || (isec->flags & SEC_LINKER_CREATED) != 0
6817 || isec->size < 4)
6818 return TRUE;
6819
6820 /* We cannot represent the required PIC relocs in the output, so don't
6821 do anything. The linker doesn't support mixing -shared and -r
6822 anyway. */
6823 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6824 return TRUE;
6825
6826 htab = ppc_elf_hash_table (link_info);
6827 if (htab == NULL)
6828 return TRUE;
6829
6830 isec->size = (isec->size + 3) & -4;
6831 if (isec->rawsize == 0)
6832 isec->rawsize = isec->size;
6833 trampbase = isec->size;
6834
6835 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6836 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6837 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6838
6839 if (htab->params->ppc476_workaround
6840 || htab->params->pic_fixup > 0)
6841 {
6842 if (elf_section_data (isec)->sec_info == NULL)
6843 {
6844 elf_section_data (isec)->sec_info
6845 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6846 if (elf_section_data (isec)->sec_info == NULL)
6847 return FALSE;
6848 }
6849 relax_info = elf_section_data (isec)->sec_info;
6850 trampbase -= relax_info->workaround_size;
6851 }
6852
6853 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6854 || strcmp (isec->output_section->name, ".fini") == 0);
6855 /* Space for a branch around any trampolines. */
6856 trampoff = trampbase;
6857 if (maybe_pasted && trampbase == isec->rawsize)
6858 trampoff += 4;
6859
6860 symtab_hdr = &elf_symtab_hdr (abfd);
6861 picfixup_size = 0;
6862 if (htab->params->branch_trampolines
6863 || htab->params->pic_fixup > 0)
6864 {
6865 /* Get a copy of the native relocations. */
6866 if (isec->reloc_count != 0)
6867 {
6868 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6869 link_info->keep_memory);
6870 if (internal_relocs == NULL)
6871 goto error_return;
6872 }
6873
6874 got2 = bfd_get_section_by_name (abfd, ".got2");
6875
6876 irelend = internal_relocs + isec->reloc_count;
6877 for (irel = internal_relocs; irel < irelend; irel++)
6878 {
6879 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6880 bfd_vma toff, roff;
6881 asection *tsec;
6882 struct one_branch_fixup *f;
6883 size_t insn_offset = 0;
6884 bfd_vma max_branch_offset = 0, val;
6885 bfd_byte *hit_addr;
6886 unsigned long t0;
6887 struct elf_link_hash_entry *h;
6888 struct plt_entry **plist;
6889 unsigned char sym_type;
6890
6891 switch (r_type)
6892 {
6893 case R_PPC_REL24:
6894 case R_PPC_LOCAL24PC:
6895 case R_PPC_PLTREL24:
6896 max_branch_offset = 1 << 25;
6897 break;
6898
6899 case R_PPC_REL14:
6900 case R_PPC_REL14_BRTAKEN:
6901 case R_PPC_REL14_BRNTAKEN:
6902 max_branch_offset = 1 << 15;
6903 break;
6904
6905 case R_PPC_ADDR16_HA:
6906 if (htab->params->pic_fixup > 0)
6907 break;
6908 continue;
6909
6910 default:
6911 continue;
6912 }
6913
6914 /* Get the value of the symbol referred to by the reloc. */
6915 h = NULL;
6916 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6917 {
6918 /* A local symbol. */
6919 Elf_Internal_Sym *isym;
6920
6921 /* Read this BFD's local symbols. */
6922 if (isymbuf == NULL)
6923 {
6924 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6925 if (isymbuf == NULL)
6926 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6927 symtab_hdr->sh_info, 0,
6928 NULL, NULL, NULL);
6929 if (isymbuf == 0)
6930 goto error_return;
6931 }
6932 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6933 if (isym->st_shndx == SHN_UNDEF)
6934 tsec = bfd_und_section_ptr;
6935 else if (isym->st_shndx == SHN_ABS)
6936 tsec = bfd_abs_section_ptr;
6937 else if (isym->st_shndx == SHN_COMMON)
6938 tsec = bfd_com_section_ptr;
6939 else
6940 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6941
6942 toff = isym->st_value;
6943 sym_type = ELF_ST_TYPE (isym->st_info);
6944 }
6945 else
6946 {
6947 /* Global symbol handling. */
6948 unsigned long indx;
6949
6950 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6951 h = elf_sym_hashes (abfd)[indx];
6952
6953 while (h->root.type == bfd_link_hash_indirect
6954 || h->root.type == bfd_link_hash_warning)
6955 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6956
6957 if (h->root.type == bfd_link_hash_defined
6958 || h->root.type == bfd_link_hash_defweak)
6959 {
6960 tsec = h->root.u.def.section;
6961 toff = h->root.u.def.value;
6962 }
6963 else if (h->root.type == bfd_link_hash_undefined
6964 || h->root.type == bfd_link_hash_undefweak)
6965 {
6966 tsec = bfd_und_section_ptr;
6967 toff = bfd_link_relocatable (link_info) ? indx : 0;
6968 }
6969 else
6970 continue;
6971
6972 /* If this branch is to __tls_get_addr then we may later
6973 optimise away the call. We won't be needing a long-
6974 branch stub in that case. */
6975 if (bfd_link_executable (link_info)
6976 && h == htab->tls_get_addr
6977 && irel != internal_relocs)
6978 {
6979 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6980 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6981 unsigned int tls_mask = 0;
6982
6983 /* The previous reloc should be one of R_PPC_TLSGD or
6984 R_PPC_TLSLD, or for older object files, a reloc
6985 on the __tls_get_addr arg setup insn. Get tls
6986 mask bits from the symbol on that reloc. */
6987 if (t_symndx < symtab_hdr->sh_info)
6988 {
6989 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6990
6991 if (local_got_offsets != NULL)
6992 {
6993 struct plt_entry **local_plt = (struct plt_entry **)
6994 (local_got_offsets + symtab_hdr->sh_info);
6995 char *lgot_masks = (char *)
6996 (local_plt + symtab_hdr->sh_info);
6997 tls_mask = lgot_masks[t_symndx];
6998 }
6999 }
7000 else
7001 {
7002 struct elf_link_hash_entry *th
7003 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7004
7005 while (th->root.type == bfd_link_hash_indirect
7006 || th->root.type == bfd_link_hash_warning)
7007 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7008
7009 tls_mask
7010 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7011 }
7012
7013 /* The mask bits tell us if the call will be
7014 optimised away. */
7015 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7016 && (t_rtype == R_PPC_TLSGD
7017 || t_rtype == R_PPC_GOT_TLSGD16
7018 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7019 continue;
7020 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7021 && (t_rtype == R_PPC_TLSLD
7022 || t_rtype == R_PPC_GOT_TLSLD16
7023 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7024 continue;
7025 }
7026
7027 sym_type = h->type;
7028 }
7029
7030 if (r_type == R_PPC_ADDR16_HA)
7031 {
7032 if (h != NULL
7033 && !h->def_regular
7034 && h->protected_def
7035 && ppc_elf_hash_entry (h)->has_addr16_ha
7036 && ppc_elf_hash_entry (h)->has_addr16_lo)
7037 picfixup_size += 12;
7038 continue;
7039 }
7040
7041 /* The condition here under which we call find_plt_ent must
7042 match that in relocate_section. If we call find_plt_ent here
7043 but not in relocate_section, or vice versa, then the branch
7044 destination used here may be incorrect. */
7045 plist = NULL;
7046 if (h != NULL)
7047 {
7048 /* We know is_branch_reloc (r_type) is true. */
7049 if (h->type == STT_GNU_IFUNC
7050 || r_type == R_PPC_PLTREL24)
7051 plist = &h->plt.plist;
7052 }
7053 else if (sym_type == STT_GNU_IFUNC
7054 && elf_local_got_offsets (abfd) != NULL)
7055 {
7056 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7057 struct plt_entry **local_plt = (struct plt_entry **)
7058 (local_got_offsets + symtab_hdr->sh_info);
7059 plist = local_plt + ELF32_R_SYM (irel->r_info);
7060 }
7061 if (plist != NULL)
7062 {
7063 bfd_vma addend = 0;
7064 struct plt_entry *ent;
7065
7066 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7067 addend = irel->r_addend;
7068 ent = find_plt_ent (plist, got2, addend);
7069 if (ent != NULL)
7070 {
7071 if (htab->plt_type == PLT_NEW
7072 || h == NULL
7073 || !htab->elf.dynamic_sections_created
7074 || h->dynindx == -1)
7075 {
7076 tsec = htab->glink;
7077 toff = ent->glink_offset;
7078 }
7079 else
7080 {
7081 tsec = htab->plt;
7082 toff = ent->plt.offset;
7083 }
7084 }
7085 }
7086
7087 /* If the branch and target are in the same section, you have
7088 no hope of adding stubs. We'll error out later should the
7089 branch overflow. */
7090 if (tsec == isec)
7091 continue;
7092
7093 /* There probably isn't any reason to handle symbols in
7094 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7095 attribute for a code section, and we are only looking at
7096 branches. However, implement it correctly here as a
7097 reference for other target relax_section functions. */
7098 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7099 {
7100 /* At this stage in linking, no SEC_MERGE symbol has been
7101 adjusted, so all references to such symbols need to be
7102 passed through _bfd_merged_section_offset. (Later, in
7103 relocate_section, all SEC_MERGE symbols *except* for
7104 section symbols have been adjusted.)
7105
7106 gas may reduce relocations against symbols in SEC_MERGE
7107 sections to a relocation against the section symbol when
7108 the original addend was zero. When the reloc is against
7109 a section symbol we should include the addend in the
7110 offset passed to _bfd_merged_section_offset, since the
7111 location of interest is the original symbol. On the
7112 other hand, an access to "sym+addend" where "sym" is not
7113 a section symbol should not include the addend; Such an
7114 access is presumed to be an offset from "sym"; The
7115 location of interest is just "sym". */
7116 if (sym_type == STT_SECTION)
7117 toff += irel->r_addend;
7118
7119 toff
7120 = _bfd_merged_section_offset (abfd, &tsec,
7121 elf_section_data (tsec)->sec_info,
7122 toff);
7123
7124 if (sym_type != STT_SECTION)
7125 toff += irel->r_addend;
7126 }
7127 /* PLTREL24 addends are special. */
7128 else if (r_type != R_PPC_PLTREL24)
7129 toff += irel->r_addend;
7130
7131 /* Attempted -shared link of non-pic code loses. */
7132 if ((!bfd_link_relocatable (link_info)
7133 && tsec == bfd_und_section_ptr)
7134 || tsec->output_section == NULL
7135 || (tsec->owner != NULL
7136 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7137 continue;
7138
7139 roff = irel->r_offset;
7140
7141 /* If the branch is in range, no need to do anything. */
7142 if (tsec != bfd_und_section_ptr
7143 && (!bfd_link_relocatable (link_info)
7144 /* A relocatable link may have sections moved during
7145 final link, so do not presume they remain in range. */
7146 || tsec->output_section == isec->output_section))
7147 {
7148 bfd_vma symaddr, reladdr;
7149
7150 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7151 reladdr = isec->output_section->vma + isec->output_offset + roff;
7152 if (symaddr - reladdr + max_branch_offset
7153 < 2 * max_branch_offset)
7154 continue;
7155 }
7156
7157 /* Look for an existing fixup to this address. */
7158 for (f = branch_fixups; f ; f = f->next)
7159 if (f->tsec == tsec && f->toff == toff)
7160 break;
7161
7162 if (f == NULL)
7163 {
7164 size_t size;
7165 unsigned long stub_rtype;
7166
7167 val = trampoff - roff;
7168 if (val >= max_branch_offset)
7169 /* Oh dear, we can't reach a trampoline. Don't try to add
7170 one. We'll report an error later. */
7171 continue;
7172
7173 if (bfd_link_pic (link_info))
7174 {
7175 size = 4 * ARRAY_SIZE (shared_stub_entry);
7176 insn_offset = 12;
7177 }
7178 else
7179 {
7180 size = 4 * ARRAY_SIZE (stub_entry);
7181 insn_offset = 0;
7182 }
7183 stub_rtype = R_PPC_RELAX;
7184 if (tsec == htab->plt
7185 || tsec == htab->glink)
7186 {
7187 stub_rtype = R_PPC_RELAX_PLT;
7188 if (r_type == R_PPC_PLTREL24)
7189 stub_rtype = R_PPC_RELAX_PLTREL24;
7190 }
7191
7192 /* Hijack the old relocation. Since we need two
7193 relocations for this use a "composite" reloc. */
7194 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7195 stub_rtype);
7196 irel->r_offset = trampoff + insn_offset;
7197 if (r_type == R_PPC_PLTREL24
7198 && stub_rtype != R_PPC_RELAX_PLTREL24)
7199 irel->r_addend = 0;
7200
7201 /* Record the fixup so we don't do it again this section. */
7202 f = bfd_malloc (sizeof (*f));
7203 f->next = branch_fixups;
7204 f->tsec = tsec;
7205 f->toff = toff;
7206 f->trampoff = trampoff;
7207 branch_fixups = f;
7208
7209 trampoff += size;
7210 changes++;
7211 }
7212 else
7213 {
7214 val = f->trampoff - roff;
7215 if (val >= max_branch_offset)
7216 continue;
7217
7218 /* Nop out the reloc, since we're finalizing things here. */
7219 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7220 }
7221
7222 /* Get the section contents. */
7223 if (contents == NULL)
7224 {
7225 /* Get cached copy if it exists. */
7226 if (elf_section_data (isec)->this_hdr.contents != NULL)
7227 contents = elf_section_data (isec)->this_hdr.contents;
7228 /* Go get them off disk. */
7229 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7230 goto error_return;
7231 }
7232
7233 /* Fix up the existing branch to hit the trampoline. */
7234 hit_addr = contents + roff;
7235 switch (r_type)
7236 {
7237 case R_PPC_REL24:
7238 case R_PPC_LOCAL24PC:
7239 case R_PPC_PLTREL24:
7240 t0 = bfd_get_32 (abfd, hit_addr);
7241 t0 &= ~0x3fffffc;
7242 t0 |= val & 0x3fffffc;
7243 bfd_put_32 (abfd, t0, hit_addr);
7244 break;
7245
7246 case R_PPC_REL14:
7247 case R_PPC_REL14_BRTAKEN:
7248 case R_PPC_REL14_BRNTAKEN:
7249 t0 = bfd_get_32 (abfd, hit_addr);
7250 t0 &= ~0xfffc;
7251 t0 |= val & 0xfffc;
7252 bfd_put_32 (abfd, t0, hit_addr);
7253 break;
7254 }
7255 }
7256
7257 while (branch_fixups != NULL)
7258 {
7259 struct one_branch_fixup *f = branch_fixups;
7260 branch_fixups = branch_fixups->next;
7261 free (f);
7262 }
7263 }
7264
7265 workaround_change = FALSE;
7266 newsize = trampoff;
7267 if (htab->params->ppc476_workaround
7268 && (!bfd_link_relocatable (link_info)
7269 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7270 {
7271 bfd_vma addr, end_addr;
7272 unsigned int crossings;
7273 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7274
7275 addr = isec->output_section->vma + isec->output_offset;
7276 end_addr = addr + trampoff;
7277 addr &= -pagesize;
7278 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7279 if (crossings != 0)
7280 {
7281 /* Keep space aligned, to ensure the patch code itself does
7282 not cross a page. Don't decrease size calculated on a
7283 previous pass as otherwise we might never settle on a layout. */
7284 newsize = 15 - ((end_addr - 1) & 15);
7285 newsize += crossings * 16;
7286 if (relax_info->workaround_size < newsize)
7287 {
7288 relax_info->workaround_size = newsize;
7289 workaround_change = TRUE;
7290 }
7291 /* Ensure relocate_section is called. */
7292 isec->flags |= SEC_RELOC;
7293 }
7294 newsize = trampoff + relax_info->workaround_size;
7295 }
7296
7297 if (htab->params->pic_fixup > 0)
7298 {
7299 picfixup_size -= relax_info->picfixup_size;
7300 if (picfixup_size != 0)
7301 relax_info->picfixup_size += picfixup_size;
7302 newsize += relax_info->picfixup_size;
7303 }
7304
7305 if (changes != 0 || picfixup_size != 0 || workaround_change)
7306 isec->size = newsize;
7307
7308 if (isymbuf != NULL
7309 && symtab_hdr->contents != (unsigned char *) isymbuf)
7310 {
7311 if (! link_info->keep_memory)
7312 free (isymbuf);
7313 else
7314 {
7315 /* Cache the symbols for elf_link_input_bfd. */
7316 symtab_hdr->contents = (unsigned char *) isymbuf;
7317 }
7318 }
7319
7320 if (contents != NULL
7321 && elf_section_data (isec)->this_hdr.contents != contents)
7322 {
7323 if (!changes && !link_info->keep_memory)
7324 free (contents);
7325 else
7326 {
7327 /* Cache the section contents for elf_link_input_bfd. */
7328 elf_section_data (isec)->this_hdr.contents = contents;
7329 }
7330 }
7331
7332 changes += picfixup_size;
7333 if (changes != 0)
7334 {
7335 /* Append sufficient NOP relocs so we can write out relocation
7336 information for the trampolines. */
7337 Elf_Internal_Shdr *rel_hdr;
7338 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7339 * sizeof (*new_relocs));
7340 unsigned ix;
7341
7342 if (!new_relocs)
7343 goto error_return;
7344 memcpy (new_relocs, internal_relocs,
7345 isec->reloc_count * sizeof (*new_relocs));
7346 for (ix = changes; ix--;)
7347 {
7348 irel = new_relocs + ix + isec->reloc_count;
7349
7350 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7351 }
7352 if (internal_relocs != elf_section_data (isec)->relocs)
7353 free (internal_relocs);
7354 elf_section_data (isec)->relocs = new_relocs;
7355 isec->reloc_count += changes;
7356 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7357 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7358 }
7359 else if (internal_relocs != NULL
7360 && elf_section_data (isec)->relocs != internal_relocs)
7361 free (internal_relocs);
7362
7363 *again = changes != 0 || workaround_change;
7364 return TRUE;
7365
7366 error_return:
7367 while (branch_fixups != NULL)
7368 {
7369 struct one_branch_fixup *f = branch_fixups;
7370 branch_fixups = branch_fixups->next;
7371 free (f);
7372 }
7373 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7374 free (isymbuf);
7375 if (contents != NULL
7376 && elf_section_data (isec)->this_hdr.contents != contents)
7377 free (contents);
7378 if (internal_relocs != NULL
7379 && elf_section_data (isec)->relocs != internal_relocs)
7380 free (internal_relocs);
7381 return FALSE;
7382 }
7383 \f
7384 /* What to do when ld finds relocations against symbols defined in
7385 discarded sections. */
7386
7387 static unsigned int
7388 ppc_elf_action_discarded (asection *sec)
7389 {
7390 if (strcmp (".fixup", sec->name) == 0)
7391 return 0;
7392
7393 if (strcmp (".got2", sec->name) == 0)
7394 return 0;
7395
7396 return _bfd_elf_default_action_discarded (sec);
7397 }
7398 \f
7399 /* Fill in the address for a pointer generated in a linker section. */
7400
7401 static bfd_vma
7402 elf_finish_pointer_linker_section (bfd *input_bfd,
7403 elf_linker_section_t *lsect,
7404 struct elf_link_hash_entry *h,
7405 bfd_vma relocation,
7406 const Elf_Internal_Rela *rel)
7407 {
7408 elf_linker_section_pointers_t *linker_section_ptr;
7409
7410 BFD_ASSERT (lsect != NULL);
7411
7412 if (h != NULL)
7413 {
7414 /* Handle global symbol. */
7415 struct ppc_elf_link_hash_entry *eh;
7416
7417 eh = (struct ppc_elf_link_hash_entry *) h;
7418 BFD_ASSERT (eh->elf.def_regular);
7419 linker_section_ptr = eh->linker_section_pointer;
7420 }
7421 else
7422 {
7423 /* Handle local symbol. */
7424 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7425
7426 BFD_ASSERT (is_ppc_elf (input_bfd));
7427 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7428 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7429 }
7430
7431 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7432 rel->r_addend,
7433 lsect);
7434 BFD_ASSERT (linker_section_ptr != NULL);
7435
7436 /* Offset will always be a multiple of four, so use the bottom bit
7437 as a "written" flag. */
7438 if ((linker_section_ptr->offset & 1) == 0)
7439 {
7440 bfd_put_32 (lsect->section->owner,
7441 relocation + linker_section_ptr->addend,
7442 lsect->section->contents + linker_section_ptr->offset);
7443 linker_section_ptr->offset += 1;
7444 }
7445
7446 relocation = (lsect->section->output_section->vma
7447 + lsect->section->output_offset
7448 + linker_section_ptr->offset - 1
7449 - SYM_VAL (lsect->sym));
7450
7451 #ifdef DEBUG
7452 fprintf (stderr,
7453 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7454 lsect->name, (long) relocation, (long) relocation);
7455 #endif
7456
7457 return relocation;
7458 }
7459
7460 #define PPC_LO(v) ((v) & 0xffff)
7461 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7462 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7463
7464 static void
7465 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7466 struct bfd_link_info *info)
7467 {
7468 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7469 bfd *output_bfd = info->output_bfd;
7470 bfd_vma plt;
7471
7472 plt = ((ent->plt.offset & ~1)
7473 + plt_sec->output_section->vma
7474 + plt_sec->output_offset);
7475
7476 if (bfd_link_pic (info))
7477 {
7478 bfd_vma got = 0;
7479
7480 if (ent->addend >= 32768)
7481 got = (ent->addend
7482 + ent->sec->output_section->vma
7483 + ent->sec->output_offset);
7484 else if (htab->elf.hgot != NULL)
7485 got = SYM_VAL (htab->elf.hgot);
7486
7487 plt -= got;
7488
7489 if (plt + 0x8000 < 0x10000)
7490 {
7491 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7492 p += 4;
7493 bfd_put_32 (output_bfd, MTCTR_11, p);
7494 p += 4;
7495 bfd_put_32 (output_bfd, BCTR, p);
7496 p += 4;
7497 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7498 p += 4;
7499 }
7500 else
7501 {
7502 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7503 p += 4;
7504 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7505 p += 4;
7506 bfd_put_32 (output_bfd, MTCTR_11, p);
7507 p += 4;
7508 bfd_put_32 (output_bfd, BCTR, p);
7509 p += 4;
7510 }
7511 }
7512 else
7513 {
7514 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7515 p += 4;
7516 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7517 p += 4;
7518 bfd_put_32 (output_bfd, MTCTR_11, p);
7519 p += 4;
7520 bfd_put_32 (output_bfd, BCTR, p);
7521 p += 4;
7522 }
7523 }
7524
7525 /* Return true if symbol is defined statically. */
7526
7527 static bfd_boolean
7528 is_static_defined (struct elf_link_hash_entry *h)
7529 {
7530 return ((h->root.type == bfd_link_hash_defined
7531 || h->root.type == bfd_link_hash_defweak)
7532 && h->root.u.def.section != NULL
7533 && h->root.u.def.section->output_section != NULL);
7534 }
7535
7536 /* If INSN is an opcode that may be used with an @tls operand, return
7537 the transformed insn for TLS optimisation, otherwise return 0. If
7538 REG is non-zero only match an insn with RB or RA equal to REG. */
7539
7540 unsigned int
7541 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7542 {
7543 unsigned int rtra;
7544
7545 if ((insn & (0x3f << 26)) != 31 << 26)
7546 return 0;
7547
7548 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7549 rtra = insn & ((1 << 26) - (1 << 16));
7550 else if (((insn >> 16) & 0x1f) == reg)
7551 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7552 else
7553 return 0;
7554
7555 if ((insn & (0x3ff << 1)) == 266 << 1)
7556 /* add -> addi. */
7557 insn = 14 << 26;
7558 else if ((insn & (0x1f << 1)) == 23 << 1
7559 && ((insn & (0x1f << 6)) < 14 << 6
7560 || ((insn & (0x1f << 6)) >= 16 << 6
7561 && (insn & (0x1f << 6)) < 24 << 6)))
7562 /* load and store indexed -> dform. */
7563 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7564 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7565 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7566 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7567 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7568 /* lwax -> lwa. */
7569 insn = (58 << 26) | 2;
7570 else
7571 return 0;
7572 insn |= rtra;
7573 return insn;
7574 }
7575
7576 /* If INSN is an opcode that may be used with an @tprel operand, return
7577 the transformed insn for an undefined weak symbol, ie. with the
7578 thread pointer REG operand removed. Otherwise return 0. */
7579
7580 unsigned int
7581 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7582 {
7583 if ((insn & (0x1f << 16)) == reg << 16
7584 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7585 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7586 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7587 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7588 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7589 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7590 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7591 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7592 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7593 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7594 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7595 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7596 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7597 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7598 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7599 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7600 && (insn & 3) != 1)
7601 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7602 && ((insn & 3) == 0 || (insn & 3) == 3))))
7603 {
7604 insn &= ~(0x1f << 16);
7605 }
7606 else if ((insn & (0x1f << 21)) == reg << 21
7607 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7608 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7609 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7610 {
7611 insn &= ~(0x1f << 21);
7612 insn |= (insn & (0x1f << 16)) << 5;
7613 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7614 insn -= 2 >> 26; /* convert to ori,oris */
7615 }
7616 else
7617 insn = 0;
7618 return insn;
7619 }
7620
7621 static bfd_boolean
7622 is_insn_ds_form (unsigned int insn)
7623 {
7624 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7625 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7626 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7627 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7628 }
7629
7630 static bfd_boolean
7631 is_insn_dq_form (unsigned int insn)
7632 {
7633 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7634 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7635 && (insn & 3) == 1));
7636 }
7637
7638 /* The RELOCATE_SECTION function is called by the ELF backend linker
7639 to handle the relocations for a section.
7640
7641 The relocs are always passed as Rela structures; if the section
7642 actually uses Rel structures, the r_addend field will always be
7643 zero.
7644
7645 This function is responsible for adjust the section contents as
7646 necessary, and (if using Rela relocs and generating a
7647 relocatable output file) adjusting the reloc addend as
7648 necessary.
7649
7650 This function does not have to worry about setting the reloc
7651 address or the reloc symbol index.
7652
7653 LOCAL_SYMS is a pointer to the swapped in local symbols.
7654
7655 LOCAL_SECTIONS is an array giving the section in the input file
7656 corresponding to the st_shndx field of each local symbol.
7657
7658 The global hash table entry for the global symbols can be found
7659 via elf_sym_hashes (input_bfd).
7660
7661 When generating relocatable output, this function must handle
7662 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7663 going to be the section symbol corresponding to the output
7664 section, which means that the addend must be adjusted
7665 accordingly. */
7666
7667 static bfd_boolean
7668 ppc_elf_relocate_section (bfd *output_bfd,
7669 struct bfd_link_info *info,
7670 bfd *input_bfd,
7671 asection *input_section,
7672 bfd_byte *contents,
7673 Elf_Internal_Rela *relocs,
7674 Elf_Internal_Sym *local_syms,
7675 asection **local_sections)
7676 {
7677 Elf_Internal_Shdr *symtab_hdr;
7678 struct elf_link_hash_entry **sym_hashes;
7679 struct ppc_elf_link_hash_table *htab;
7680 Elf_Internal_Rela *rel;
7681 Elf_Internal_Rela *wrel;
7682 Elf_Internal_Rela *relend;
7683 Elf_Internal_Rela outrel;
7684 asection *got2;
7685 bfd_vma *local_got_offsets;
7686 bfd_boolean ret = TRUE;
7687 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7688 bfd_boolean is_vxworks_tls;
7689 unsigned int picfixup_size = 0;
7690 struct ppc_elf_relax_info *relax_info = NULL;
7691
7692 #ifdef DEBUG
7693 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7694 "%ld relocations%s",
7695 input_bfd, input_section,
7696 (long) input_section->reloc_count,
7697 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7698 #endif
7699
7700 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7701
7702 /* Initialize howto table if not already done. */
7703 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7704 ppc_elf_howto_init ();
7705
7706 htab = ppc_elf_hash_table (info);
7707 local_got_offsets = elf_local_got_offsets (input_bfd);
7708 symtab_hdr = &elf_symtab_hdr (input_bfd);
7709 sym_hashes = elf_sym_hashes (input_bfd);
7710 /* We have to handle relocations in vxworks .tls_vars sections
7711 specially, because the dynamic loader is 'weird'. */
7712 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7713 && !strcmp (input_section->output_section->name,
7714 ".tls_vars"));
7715 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7716 relax_info = elf_section_data (input_section)->sec_info;
7717 rel = wrel = relocs;
7718 relend = relocs + input_section->reloc_count;
7719 for (; rel < relend; wrel++, rel++)
7720 {
7721 enum elf_ppc_reloc_type r_type;
7722 bfd_vma addend;
7723 bfd_reloc_status_type r;
7724 Elf_Internal_Sym *sym;
7725 asection *sec;
7726 struct elf_link_hash_entry *h;
7727 const char *sym_name;
7728 reloc_howto_type *howto;
7729 unsigned long r_symndx;
7730 bfd_vma relocation;
7731 bfd_vma branch_bit, from;
7732 bfd_boolean unresolved_reloc;
7733 bfd_boolean warned;
7734 unsigned int tls_type, tls_mask, tls_gd;
7735 struct plt_entry **ifunc;
7736 struct reloc_howto_struct alt_howto;
7737
7738 again:
7739 r_type = ELF32_R_TYPE (rel->r_info);
7740 sym = NULL;
7741 sec = NULL;
7742 h = NULL;
7743 unresolved_reloc = FALSE;
7744 warned = FALSE;
7745 r_symndx = ELF32_R_SYM (rel->r_info);
7746
7747 if (r_symndx < symtab_hdr->sh_info)
7748 {
7749 sym = local_syms + r_symndx;
7750 sec = local_sections[r_symndx];
7751 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7752
7753 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7754 }
7755 else
7756 {
7757 bfd_boolean ignored;
7758
7759 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7760 r_symndx, symtab_hdr, sym_hashes,
7761 h, sec, relocation,
7762 unresolved_reloc, warned, ignored);
7763
7764 sym_name = h->root.root.string;
7765 }
7766
7767 if (sec != NULL && discarded_section (sec))
7768 {
7769 /* For relocs against symbols from removed linkonce sections,
7770 or sections discarded by a linker script, we just want the
7771 section contents zeroed. Avoid any special processing. */
7772 howto = NULL;
7773 if (r_type < R_PPC_max)
7774 howto = ppc_elf_howto_table[r_type];
7775
7776 _bfd_clear_contents (howto, input_bfd, input_section,
7777 contents + rel->r_offset);
7778 wrel->r_offset = rel->r_offset;
7779 wrel->r_info = 0;
7780 wrel->r_addend = 0;
7781
7782 /* For ld -r, remove relocations in debug sections against
7783 sections defined in discarded sections. Not done for
7784 non-debug to preserve relocs in .eh_frame which the
7785 eh_frame editing code expects to be present. */
7786 if (bfd_link_relocatable (info)
7787 && (input_section->flags & SEC_DEBUGGING))
7788 wrel--;
7789
7790 continue;
7791 }
7792
7793 if (bfd_link_relocatable (info))
7794 {
7795 if (got2 != NULL
7796 && r_type == R_PPC_PLTREL24
7797 && rel->r_addend != 0)
7798 {
7799 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7800 addend specifies the GOT pointer offset within .got2. */
7801 rel->r_addend += got2->output_offset;
7802 }
7803 if (r_type != R_PPC_RELAX_PLT
7804 && r_type != R_PPC_RELAX_PLTREL24
7805 && r_type != R_PPC_RELAX)
7806 goto copy_reloc;
7807 }
7808
7809 /* TLS optimizations. Replace instruction sequences and relocs
7810 based on information we collected in tls_optimize. We edit
7811 RELOCS so that --emit-relocs will output something sensible
7812 for the final instruction stream. */
7813 tls_mask = 0;
7814 tls_gd = 0;
7815 if (h != NULL)
7816 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7817 else if (local_got_offsets != NULL)
7818 {
7819 struct plt_entry **local_plt;
7820 char *lgot_masks;
7821 local_plt
7822 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7823 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7824 tls_mask = lgot_masks[r_symndx];
7825 }
7826
7827 /* Ensure reloc mapping code below stays sane. */
7828 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7829 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7830 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7831 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7832 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7833 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7834 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7835 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7836 abort ();
7837 switch (r_type)
7838 {
7839 default:
7840 break;
7841
7842 case R_PPC_GOT_TPREL16:
7843 case R_PPC_GOT_TPREL16_LO:
7844 if ((tls_mask & TLS_TLS) != 0
7845 && (tls_mask & TLS_TPREL) == 0)
7846 {
7847 bfd_vma insn;
7848
7849 insn = bfd_get_32 (output_bfd,
7850 contents + rel->r_offset - d_offset);
7851 insn &= 31 << 21;
7852 insn |= 0x3c020000; /* addis 0,2,0 */
7853 bfd_put_32 (output_bfd, insn,
7854 contents + rel->r_offset - d_offset);
7855 r_type = R_PPC_TPREL16_HA;
7856 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7857 }
7858 break;
7859
7860 case R_PPC_TLS:
7861 if ((tls_mask & TLS_TLS) != 0
7862 && (tls_mask & TLS_TPREL) == 0)
7863 {
7864 bfd_vma insn;
7865
7866 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7867 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7868 if (insn == 0)
7869 abort ();
7870 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7871 r_type = R_PPC_TPREL16_LO;
7872 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7873
7874 /* Was PPC_TLS which sits on insn boundary, now
7875 PPC_TPREL16_LO which is at low-order half-word. */
7876 rel->r_offset += d_offset;
7877 }
7878 break;
7879
7880 case R_PPC_GOT_TLSGD16_HI:
7881 case R_PPC_GOT_TLSGD16_HA:
7882 tls_gd = TLS_TPRELGD;
7883 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7884 goto tls_gdld_hi;
7885 break;
7886
7887 case R_PPC_GOT_TLSLD16_HI:
7888 case R_PPC_GOT_TLSLD16_HA:
7889 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7890 {
7891 tls_gdld_hi:
7892 if ((tls_mask & tls_gd) != 0)
7893 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7894 + R_PPC_GOT_TPREL16);
7895 else
7896 {
7897 rel->r_offset -= d_offset;
7898 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7899 r_type = R_PPC_NONE;
7900 }
7901 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7902 }
7903 break;
7904
7905 case R_PPC_GOT_TLSGD16:
7906 case R_PPC_GOT_TLSGD16_LO:
7907 tls_gd = TLS_TPRELGD;
7908 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7909 goto tls_ldgd_opt;
7910 break;
7911
7912 case R_PPC_GOT_TLSLD16:
7913 case R_PPC_GOT_TLSLD16_LO:
7914 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7915 {
7916 unsigned int insn1, insn2;
7917 bfd_vma offset;
7918
7919 tls_ldgd_opt:
7920 offset = (bfd_vma) -1;
7921 /* If not using the newer R_PPC_TLSGD/LD to mark
7922 __tls_get_addr calls, we must trust that the call
7923 stays with its arg setup insns, ie. that the next
7924 reloc is the __tls_get_addr call associated with
7925 the current reloc. Edit both insns. */
7926 if (input_section->has_tls_get_addr_call
7927 && rel + 1 < relend
7928 && branch_reloc_hash_match (input_bfd, rel + 1,
7929 htab->tls_get_addr))
7930 offset = rel[1].r_offset;
7931 /* We read the low GOT_TLS insn because we need to keep
7932 the destination reg. It may be something other than
7933 the usual r3, and moved to r3 before the call by
7934 intervening code. */
7935 insn1 = bfd_get_32 (output_bfd,
7936 contents + rel->r_offset - d_offset);
7937 if ((tls_mask & tls_gd) != 0)
7938 {
7939 /* IE */
7940 insn1 &= (0x1f << 21) | (0x1f << 16);
7941 insn1 |= 32 << 26; /* lwz */
7942 if (offset != (bfd_vma) -1)
7943 {
7944 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7945 insn2 = 0x7c631214; /* add 3,3,2 */
7946 bfd_put_32 (output_bfd, insn2, contents + offset);
7947 }
7948 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7949 + R_PPC_GOT_TPREL16);
7950 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7951 }
7952 else
7953 {
7954 /* LE */
7955 insn1 &= 0x1f << 21;
7956 insn1 |= 0x3c020000; /* addis r,2,0 */
7957 if (tls_gd == 0)
7958 {
7959 /* Was an LD reloc. */
7960 for (r_symndx = 0;
7961 r_symndx < symtab_hdr->sh_info;
7962 r_symndx++)
7963 if (local_sections[r_symndx] == sec)
7964 break;
7965 if (r_symndx >= symtab_hdr->sh_info)
7966 r_symndx = STN_UNDEF;
7967 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7968 if (r_symndx != STN_UNDEF)
7969 rel->r_addend -= (local_syms[r_symndx].st_value
7970 + sec->output_offset
7971 + sec->output_section->vma);
7972 }
7973 r_type = R_PPC_TPREL16_HA;
7974 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7975 if (offset != (bfd_vma) -1)
7976 {
7977 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7978 rel[1].r_offset = offset + d_offset;
7979 rel[1].r_addend = rel->r_addend;
7980 insn2 = 0x38630000; /* addi 3,3,0 */
7981 bfd_put_32 (output_bfd, insn2, contents + offset);
7982 }
7983 }
7984 bfd_put_32 (output_bfd, insn1,
7985 contents + rel->r_offset - d_offset);
7986 if (tls_gd == 0)
7987 {
7988 /* We changed the symbol on an LD reloc. Start over
7989 in order to get h, sym, sec etc. right. */
7990 goto again;
7991 }
7992 }
7993 break;
7994
7995 case R_PPC_TLSGD:
7996 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7997 {
7998 unsigned int insn2;
7999 bfd_vma offset = rel->r_offset;
8000
8001 if ((tls_mask & TLS_TPRELGD) != 0)
8002 {
8003 /* IE */
8004 r_type = R_PPC_NONE;
8005 insn2 = 0x7c631214; /* add 3,3,2 */
8006 }
8007 else
8008 {
8009 /* LE */
8010 r_type = R_PPC_TPREL16_LO;
8011 rel->r_offset += d_offset;
8012 insn2 = 0x38630000; /* addi 3,3,0 */
8013 }
8014 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8015 bfd_put_32 (output_bfd, insn2, contents + offset);
8016 /* Zap the reloc on the _tls_get_addr call too. */
8017 BFD_ASSERT (offset == rel[1].r_offset);
8018 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8019 }
8020 break;
8021
8022 case R_PPC_TLSLD:
8023 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8024 {
8025 unsigned int insn2;
8026
8027 for (r_symndx = 0;
8028 r_symndx < symtab_hdr->sh_info;
8029 r_symndx++)
8030 if (local_sections[r_symndx] == sec)
8031 break;
8032 if (r_symndx >= symtab_hdr->sh_info)
8033 r_symndx = STN_UNDEF;
8034 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8035 if (r_symndx != STN_UNDEF)
8036 rel->r_addend -= (local_syms[r_symndx].st_value
8037 + sec->output_offset
8038 + sec->output_section->vma);
8039
8040 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8041 rel->r_offset += d_offset;
8042 insn2 = 0x38630000; /* addi 3,3,0 */
8043 bfd_put_32 (output_bfd, insn2,
8044 contents + rel->r_offset - d_offset);
8045 /* Zap the reloc on the _tls_get_addr call too. */
8046 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8047 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8048 goto again;
8049 }
8050 break;
8051 }
8052
8053 /* Handle other relocations that tweak non-addend part of insn. */
8054 branch_bit = 0;
8055 switch (r_type)
8056 {
8057 default:
8058 break;
8059
8060 /* Branch taken prediction relocations. */
8061 case R_PPC_ADDR14_BRTAKEN:
8062 case R_PPC_REL14_BRTAKEN:
8063 branch_bit = BRANCH_PREDICT_BIT;
8064 /* Fall thru */
8065
8066 /* Branch not taken prediction relocations. */
8067 case R_PPC_ADDR14_BRNTAKEN:
8068 case R_PPC_REL14_BRNTAKEN:
8069 {
8070 bfd_vma insn;
8071
8072 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8073 insn &= ~BRANCH_PREDICT_BIT;
8074 insn |= branch_bit;
8075
8076 from = (rel->r_offset
8077 + input_section->output_offset
8078 + input_section->output_section->vma);
8079
8080 /* Invert 'y' bit if not the default. */
8081 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8082 insn ^= BRANCH_PREDICT_BIT;
8083
8084 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8085 break;
8086 }
8087 }
8088
8089 if (ELIMINATE_COPY_RELOCS
8090 && h != NULL
8091 && !h->def_regular
8092 && h->protected_def
8093 && ppc_elf_hash_entry (h)->has_addr16_ha
8094 && ppc_elf_hash_entry (h)->has_addr16_lo
8095 && htab->params->pic_fixup > 0)
8096 {
8097 /* Convert lis;addi or lis;load/store accessing a protected
8098 variable defined in a shared library to PIC. */
8099 unsigned int insn;
8100
8101 if (r_type == R_PPC_ADDR16_HA)
8102 {
8103 insn = bfd_get_32 (output_bfd,
8104 contents + rel->r_offset - d_offset);
8105 if ((insn & (0x3f << 26)) == (15u << 26)
8106 && (insn & (0x1f << 16)) == 0 /* lis */)
8107 {
8108 bfd_byte *p;
8109 bfd_vma off;
8110 bfd_vma got_addr;
8111
8112 p = (contents + input_section->size
8113 - relax_info->workaround_size
8114 - relax_info->picfixup_size
8115 + picfixup_size);
8116 off = (p - contents) - (rel->r_offset - d_offset);
8117 if (off > 0x1fffffc || (off & 3) != 0)
8118 info->callbacks->einfo
8119 (_("%P: %H: fixup branch overflow\n"),
8120 input_bfd, input_section, rel->r_offset);
8121
8122 bfd_put_32 (output_bfd, B | off,
8123 contents + rel->r_offset - d_offset);
8124 got_addr = (htab->got->output_section->vma
8125 + htab->got->output_offset
8126 + (h->got.offset & ~1));
8127 wrel->r_offset = (p - contents) + d_offset;
8128 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8129 wrel->r_addend = got_addr;
8130 insn &= ~0xffff;
8131 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8132 bfd_put_32 (output_bfd, insn, p);
8133
8134 /* Convert lis to lwz, loading address from GOT. */
8135 insn &= ~0xffff;
8136 insn ^= (32u ^ 15u) << 26;
8137 insn |= (insn & (0x1f << 21)) >> 5;
8138 insn |= got_addr & 0xffff;
8139 bfd_put_32 (output_bfd, insn, p + 4);
8140
8141 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8142 picfixup_size += 12;
8143
8144 /* Use one of the spare relocs, so --emit-relocs
8145 output is reasonable. */
8146 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8147 wrel++, rel++;
8148 rel->r_offset = wrel[-1].r_offset + 4;
8149 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8150 rel->r_addend = wrel[-1].r_addend;
8151
8152 /* Continue on as if we had a got reloc, to output
8153 dynamic reloc. */
8154 r_type = R_PPC_GOT16_LO;
8155 }
8156 else
8157 info->callbacks->einfo
8158 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8159 input_bfd, input_section, rel->r_offset,
8160 "R_PPC_ADDR16_HA", insn);
8161 }
8162 else if (r_type == R_PPC_ADDR16_LO)
8163 {
8164 insn = bfd_get_32 (output_bfd,
8165 contents + rel->r_offset - d_offset);
8166 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8167 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8168 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8169 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8170 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8171 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8172 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8173 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8174 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8175 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8176 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8177 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8178 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8179 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8180 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8181 && (insn & 3) != 1)
8182 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8183 && ((insn & 3) == 0 || (insn & 3) == 3)))
8184 {
8185 /* Arrange to apply the reloc addend, if any. */
8186 relocation = 0;
8187 unresolved_reloc = FALSE;
8188 rel->r_info = ELF32_R_INFO (0, r_type);
8189 }
8190 else
8191 info->callbacks->einfo
8192 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8193 input_bfd, input_section, rel->r_offset,
8194 "R_PPC_ADDR16_LO", insn);
8195 }
8196 }
8197
8198 ifunc = NULL;
8199 if (!htab->is_vxworks)
8200 {
8201 struct plt_entry *ent;
8202
8203 if (h != NULL)
8204 {
8205 if (h->type == STT_GNU_IFUNC)
8206 ifunc = &h->plt.plist;
8207 }
8208 else if (local_got_offsets != NULL
8209 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8210 {
8211 struct plt_entry **local_plt;
8212
8213 local_plt = (struct plt_entry **) (local_got_offsets
8214 + symtab_hdr->sh_info);
8215 ifunc = local_plt + r_symndx;
8216 }
8217
8218 ent = NULL;
8219 if (ifunc != NULL
8220 && (!bfd_link_pic (info)
8221 || is_branch_reloc (r_type)))
8222 {
8223 addend = 0;
8224 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8225 addend = rel->r_addend;
8226 ent = find_plt_ent (ifunc, got2, addend);
8227 }
8228 if (ent != NULL)
8229 {
8230 if (h == NULL && (ent->plt.offset & 1) == 0)
8231 {
8232 Elf_Internal_Rela rela;
8233 bfd_byte *loc;
8234
8235 rela.r_offset = (htab->iplt->output_section->vma
8236 + htab->iplt->output_offset
8237 + ent->plt.offset);
8238 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8239 rela.r_addend = relocation;
8240 loc = htab->reliplt->contents;
8241 loc += (htab->reliplt->reloc_count++
8242 * sizeof (Elf32_External_Rela));
8243 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8244
8245 ent->plt.offset |= 1;
8246 }
8247 if (h == NULL && (ent->glink_offset & 1) == 0)
8248 {
8249 unsigned char *p = ((unsigned char *) htab->glink->contents
8250 + ent->glink_offset);
8251 write_glink_stub (ent, htab->iplt, p, info);
8252 ent->glink_offset |= 1;
8253 }
8254
8255 unresolved_reloc = FALSE;
8256 if (htab->plt_type == PLT_NEW
8257 || !htab->elf.dynamic_sections_created
8258 || h == NULL
8259 || h->dynindx == -1)
8260 relocation = (htab->glink->output_section->vma
8261 + htab->glink->output_offset
8262 + (ent->glink_offset & ~1));
8263 else
8264 relocation = (htab->plt->output_section->vma
8265 + htab->plt->output_offset
8266 + ent->plt.offset);
8267 }
8268 }
8269
8270 addend = rel->r_addend;
8271 tls_type = 0;
8272 howto = NULL;
8273 if (r_type < R_PPC_max)
8274 howto = ppc_elf_howto_table[r_type];
8275 switch (r_type)
8276 {
8277 default:
8278 info->callbacks->einfo
8279 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8280 input_bfd, (int) r_type, sym_name);
8281
8282 bfd_set_error (bfd_error_bad_value);
8283 ret = FALSE;
8284 goto copy_reloc;
8285
8286 case R_PPC_NONE:
8287 case R_PPC_TLS:
8288 case R_PPC_TLSGD:
8289 case R_PPC_TLSLD:
8290 case R_PPC_EMB_MRKREF:
8291 case R_PPC_GNU_VTINHERIT:
8292 case R_PPC_GNU_VTENTRY:
8293 goto copy_reloc;
8294
8295 /* GOT16 relocations. Like an ADDR16 using the symbol's
8296 address in the GOT as relocation value instead of the
8297 symbol's value itself. Also, create a GOT entry for the
8298 symbol and put the symbol value there. */
8299 case R_PPC_GOT_TLSGD16:
8300 case R_PPC_GOT_TLSGD16_LO:
8301 case R_PPC_GOT_TLSGD16_HI:
8302 case R_PPC_GOT_TLSGD16_HA:
8303 tls_type = TLS_TLS | TLS_GD;
8304 goto dogot;
8305
8306 case R_PPC_GOT_TLSLD16:
8307 case R_PPC_GOT_TLSLD16_LO:
8308 case R_PPC_GOT_TLSLD16_HI:
8309 case R_PPC_GOT_TLSLD16_HA:
8310 tls_type = TLS_TLS | TLS_LD;
8311 goto dogot;
8312
8313 case R_PPC_GOT_TPREL16:
8314 case R_PPC_GOT_TPREL16_LO:
8315 case R_PPC_GOT_TPREL16_HI:
8316 case R_PPC_GOT_TPREL16_HA:
8317 tls_type = TLS_TLS | TLS_TPREL;
8318 goto dogot;
8319
8320 case R_PPC_GOT_DTPREL16:
8321 case R_PPC_GOT_DTPREL16_LO:
8322 case R_PPC_GOT_DTPREL16_HI:
8323 case R_PPC_GOT_DTPREL16_HA:
8324 tls_type = TLS_TLS | TLS_DTPREL;
8325 goto dogot;
8326
8327 case R_PPC_GOT16:
8328 case R_PPC_GOT16_LO:
8329 case R_PPC_GOT16_HI:
8330 case R_PPC_GOT16_HA:
8331 tls_mask = 0;
8332 dogot:
8333 {
8334 /* Relocation is to the entry for this symbol in the global
8335 offset table. */
8336 bfd_vma off;
8337 bfd_vma *offp;
8338 unsigned long indx;
8339
8340 if (htab->got == NULL)
8341 abort ();
8342
8343 indx = 0;
8344 if (tls_type == (TLS_TLS | TLS_LD)
8345 && (h == NULL
8346 || !h->def_dynamic))
8347 offp = &htab->tlsld_got.offset;
8348 else if (h != NULL)
8349 {
8350 bfd_boolean dyn;
8351 dyn = htab->elf.dynamic_sections_created;
8352 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8353 || (bfd_link_pic (info)
8354 && SYMBOL_REFERENCES_LOCAL (info, h)))
8355 /* This is actually a static link, or it is a
8356 -Bsymbolic link and the symbol is defined
8357 locally, or the symbol was forced to be local
8358 because of a version file. */
8359 ;
8360 else
8361 {
8362 BFD_ASSERT (h->dynindx != -1);
8363 indx = h->dynindx;
8364 unresolved_reloc = FALSE;
8365 }
8366 offp = &h->got.offset;
8367 }
8368 else
8369 {
8370 if (local_got_offsets == NULL)
8371 abort ();
8372 offp = &local_got_offsets[r_symndx];
8373 }
8374
8375 /* The offset must always be a multiple of 4. We use the
8376 least significant bit to record whether we have already
8377 processed this entry. */
8378 off = *offp;
8379 if ((off & 1) != 0)
8380 off &= ~1;
8381 else
8382 {
8383 unsigned int tls_m = (tls_mask
8384 & (TLS_LD | TLS_GD | TLS_DTPREL
8385 | TLS_TPREL | TLS_TPRELGD));
8386
8387 if (offp == &htab->tlsld_got.offset)
8388 tls_m = TLS_LD;
8389 else if (h == NULL
8390 || !h->def_dynamic)
8391 tls_m &= ~TLS_LD;
8392
8393 /* We might have multiple got entries for this sym.
8394 Initialize them all. */
8395 do
8396 {
8397 int tls_ty = 0;
8398
8399 if ((tls_m & TLS_LD) != 0)
8400 {
8401 tls_ty = TLS_TLS | TLS_LD;
8402 tls_m &= ~TLS_LD;
8403 }
8404 else if ((tls_m & TLS_GD) != 0)
8405 {
8406 tls_ty = TLS_TLS | TLS_GD;
8407 tls_m &= ~TLS_GD;
8408 }
8409 else if ((tls_m & TLS_DTPREL) != 0)
8410 {
8411 tls_ty = TLS_TLS | TLS_DTPREL;
8412 tls_m &= ~TLS_DTPREL;
8413 }
8414 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8415 {
8416 tls_ty = TLS_TLS | TLS_TPREL;
8417 tls_m = 0;
8418 }
8419
8420 /* Generate relocs for the dynamic linker. */
8421 if ((bfd_link_pic (info) || indx != 0)
8422 && (offp == &htab->tlsld_got.offset
8423 || h == NULL
8424 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8425 || h->root.type != bfd_link_hash_undefweak))
8426 {
8427 asection *rsec = htab->relgot;
8428 bfd_byte * loc;
8429
8430 if (ifunc != NULL)
8431 rsec = htab->reliplt;
8432 outrel.r_offset = (htab->got->output_section->vma
8433 + htab->got->output_offset
8434 + off);
8435 outrel.r_addend = 0;
8436 if (tls_ty & (TLS_LD | TLS_GD))
8437 {
8438 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8439 if (tls_ty == (TLS_TLS | TLS_GD))
8440 {
8441 loc = rsec->contents;
8442 loc += (rsec->reloc_count++
8443 * sizeof (Elf32_External_Rela));
8444 bfd_elf32_swap_reloca_out (output_bfd,
8445 &outrel, loc);
8446 outrel.r_offset += 4;
8447 outrel.r_info
8448 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8449 }
8450 }
8451 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8452 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8453 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8454 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8455 else if (indx != 0)
8456 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8457 else if (ifunc != NULL)
8458 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8459 else
8460 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8461 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8462 {
8463 outrel.r_addend += relocation;
8464 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8465 {
8466 if (htab->elf.tls_sec == NULL)
8467 outrel.r_addend = 0;
8468 else
8469 outrel.r_addend -= htab->elf.tls_sec->vma;
8470 }
8471 }
8472 loc = rsec->contents;
8473 loc += (rsec->reloc_count++
8474 * sizeof (Elf32_External_Rela));
8475 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8476 }
8477
8478 /* Init the .got section contents if we're not
8479 emitting a reloc. */
8480 else
8481 {
8482 bfd_vma value = relocation;
8483
8484 if (tls_ty == (TLS_TLS | TLS_LD))
8485 value = 1;
8486 else if (tls_ty != 0)
8487 {
8488 if (htab->elf.tls_sec == NULL)
8489 value = 0;
8490 else
8491 {
8492 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8493 if (tls_ty == (TLS_TLS | TLS_TPREL))
8494 value += DTP_OFFSET - TP_OFFSET;
8495 }
8496
8497 if (tls_ty == (TLS_TLS | TLS_GD))
8498 {
8499 bfd_put_32 (output_bfd, value,
8500 htab->got->contents + off + 4);
8501 value = 1;
8502 }
8503 }
8504 bfd_put_32 (output_bfd, value,
8505 htab->got->contents + off);
8506 }
8507
8508 off += 4;
8509 if (tls_ty & (TLS_LD | TLS_GD))
8510 off += 4;
8511 }
8512 while (tls_m != 0);
8513
8514 off = *offp;
8515 *offp = off | 1;
8516 }
8517
8518 if (off >= (bfd_vma) -2)
8519 abort ();
8520
8521 if ((tls_type & TLS_TLS) != 0)
8522 {
8523 if (tls_type != (TLS_TLS | TLS_LD))
8524 {
8525 if ((tls_mask & TLS_LD) != 0
8526 && !(h == NULL
8527 || !h->def_dynamic))
8528 off += 8;
8529 if (tls_type != (TLS_TLS | TLS_GD))
8530 {
8531 if ((tls_mask & TLS_GD) != 0)
8532 off += 8;
8533 if (tls_type != (TLS_TLS | TLS_DTPREL))
8534 {
8535 if ((tls_mask & TLS_DTPREL) != 0)
8536 off += 4;
8537 }
8538 }
8539 }
8540 }
8541
8542 /* If here for a picfixup, we're done. */
8543 if (r_type != ELF32_R_TYPE (rel->r_info))
8544 goto copy_reloc;
8545
8546 relocation = (htab->got->output_section->vma
8547 + htab->got->output_offset
8548 + off
8549 - SYM_VAL (htab->elf.hgot));
8550
8551 /* Addends on got relocations don't make much sense.
8552 x+off@got is actually x@got+off, and since the got is
8553 generated by a hash table traversal, the value in the
8554 got at entry m+n bears little relation to the entry m. */
8555 if (addend != 0)
8556 info->callbacks->einfo
8557 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8558 input_bfd, input_section, rel->r_offset,
8559 howto->name,
8560 sym_name);
8561 }
8562 break;
8563
8564 /* Relocations that need no special processing. */
8565 case R_PPC_LOCAL24PC:
8566 /* It makes no sense to point a local relocation
8567 at a symbol not in this object. */
8568 if (unresolved_reloc)
8569 {
8570 (*info->callbacks->undefined_symbol) (info,
8571 h->root.root.string,
8572 input_bfd,
8573 input_section,
8574 rel->r_offset,
8575 TRUE);
8576 goto copy_reloc;
8577 }
8578 break;
8579
8580 case R_PPC_DTPREL16:
8581 case R_PPC_DTPREL16_LO:
8582 case R_PPC_DTPREL16_HI:
8583 case R_PPC_DTPREL16_HA:
8584 if (htab->elf.tls_sec != NULL)
8585 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8586 break;
8587
8588 /* Relocations that may need to be propagated if this is a shared
8589 object. */
8590 case R_PPC_TPREL16:
8591 case R_PPC_TPREL16_LO:
8592 case R_PPC_TPREL16_HI:
8593 case R_PPC_TPREL16_HA:
8594 if (h != NULL
8595 && h->root.type == bfd_link_hash_undefweak
8596 && h->dynindx == -1)
8597 {
8598 /* Make this relocation against an undefined weak symbol
8599 resolve to zero. This is really just a tweak, since
8600 code using weak externs ought to check that they are
8601 defined before using them. */
8602 bfd_byte *p = contents + rel->r_offset - d_offset;
8603 unsigned int insn = bfd_get_32 (output_bfd, p);
8604 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8605 if (insn != 0)
8606 bfd_put_32 (output_bfd, insn, p);
8607 break;
8608 }
8609 if (htab->elf.tls_sec != NULL)
8610 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8611 /* The TPREL16 relocs shouldn't really be used in shared
8612 libs as they will result in DT_TEXTREL being set, but
8613 support them anyway. */
8614 goto dodyn;
8615
8616 case R_PPC_TPREL32:
8617 if (htab->elf.tls_sec != NULL)
8618 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8619 goto dodyn;
8620
8621 case R_PPC_DTPREL32:
8622 if (htab->elf.tls_sec != NULL)
8623 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8624 goto dodyn;
8625
8626 case R_PPC_DTPMOD32:
8627 relocation = 1;
8628 addend = 0;
8629 goto dodyn;
8630
8631 case R_PPC_REL16:
8632 case R_PPC_REL16_LO:
8633 case R_PPC_REL16_HI:
8634 case R_PPC_REL16_HA:
8635 case R_PPC_REL16DX_HA:
8636 break;
8637
8638 case R_PPC_REL32:
8639 if (h == NULL || h == htab->elf.hgot)
8640 break;
8641 /* fall through */
8642
8643 case R_PPC_ADDR32:
8644 case R_PPC_ADDR16:
8645 case R_PPC_ADDR16_LO:
8646 case R_PPC_ADDR16_HI:
8647 case R_PPC_ADDR16_HA:
8648 case R_PPC_UADDR32:
8649 case R_PPC_UADDR16:
8650 goto dodyn;
8651
8652 case R_PPC_VLE_REL8:
8653 case R_PPC_VLE_REL15:
8654 case R_PPC_VLE_REL24:
8655 case R_PPC_REL24:
8656 case R_PPC_REL14:
8657 case R_PPC_REL14_BRTAKEN:
8658 case R_PPC_REL14_BRNTAKEN:
8659 /* If these relocations are not to a named symbol, they can be
8660 handled right here, no need to bother the dynamic linker. */
8661 if (SYMBOL_CALLS_LOCAL (info, h)
8662 || h == htab->elf.hgot)
8663 break;
8664 /* fall through */
8665
8666 case R_PPC_ADDR24:
8667 case R_PPC_ADDR14:
8668 case R_PPC_ADDR14_BRTAKEN:
8669 case R_PPC_ADDR14_BRNTAKEN:
8670 if (h != NULL && !bfd_link_pic (info))
8671 break;
8672 /* fall through */
8673
8674 dodyn:
8675 if ((input_section->flags & SEC_ALLOC) == 0
8676 || is_vxworks_tls)
8677 break;
8678
8679 if ((bfd_link_pic (info)
8680 && !(h != NULL
8681 && ((h->root.type == bfd_link_hash_undefined
8682 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8683 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8684 || (h->root.type == bfd_link_hash_undefweak
8685 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8686 && (must_be_dyn_reloc (info, r_type)
8687 || !SYMBOL_CALLS_LOCAL (info, h)))
8688 || (ELIMINATE_COPY_RELOCS
8689 && !bfd_link_pic (info)
8690 && h != NULL
8691 && h->dynindx != -1
8692 && !h->non_got_ref
8693 && !h->def_regular
8694 && !(h->protected_def
8695 && ppc_elf_hash_entry (h)->has_addr16_ha
8696 && ppc_elf_hash_entry (h)->has_addr16_lo
8697 && htab->params->pic_fixup > 0)))
8698 {
8699 int skip;
8700 bfd_byte *loc;
8701 asection *sreloc;
8702 #ifdef DEBUG
8703 fprintf (stderr, "ppc_elf_relocate_section needs to "
8704 "create relocation for %s\n",
8705 (h && h->root.root.string
8706 ? h->root.root.string : "<unknown>"));
8707 #endif
8708
8709 /* When generating a shared object, these relocations
8710 are copied into the output file to be resolved at run
8711 time. */
8712 sreloc = elf_section_data (input_section)->sreloc;
8713 if (ifunc)
8714 sreloc = htab->reliplt;
8715 if (sreloc == NULL)
8716 return FALSE;
8717
8718 skip = 0;
8719 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8720 input_section,
8721 rel->r_offset);
8722 if (outrel.r_offset == (bfd_vma) -1
8723 || outrel.r_offset == (bfd_vma) -2)
8724 skip = (int) outrel.r_offset;
8725 outrel.r_offset += (input_section->output_section->vma
8726 + input_section->output_offset);
8727
8728 if (skip)
8729 memset (&outrel, 0, sizeof outrel);
8730 else if ((h != NULL
8731 && (h->root.type == bfd_link_hash_undefined
8732 || h->root.type == bfd_link_hash_undefweak))
8733 || !SYMBOL_REFERENCES_LOCAL (info, h))
8734 {
8735 BFD_ASSERT (h->dynindx != -1);
8736 unresolved_reloc = FALSE;
8737 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8738 outrel.r_addend = rel->r_addend;
8739 }
8740 else
8741 {
8742 outrel.r_addend = relocation + rel->r_addend;
8743
8744 if (r_type != R_PPC_ADDR32)
8745 {
8746 long indx = 0;
8747
8748 if (ifunc != NULL)
8749 {
8750 /* If we get here when building a static
8751 executable, then the libc startup function
8752 responsible for applying indirect function
8753 relocations is going to complain about
8754 the reloc type.
8755 If we get here when building a dynamic
8756 executable, it will be because we have
8757 a text relocation. The dynamic loader
8758 will set the text segment writable and
8759 non-executable to apply text relocations.
8760 So we'll segfault when trying to run the
8761 indirection function to resolve the reloc. */
8762 info->callbacks->einfo
8763 (_("%P: %H: relocation %s for indirect "
8764 "function %s unsupported\n"),
8765 input_bfd, input_section, rel->r_offset,
8766 howto->name,
8767 sym_name);
8768 ret = FALSE;
8769 }
8770 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8771 ;
8772 else if (sec == NULL || sec->owner == NULL)
8773 {
8774 bfd_set_error (bfd_error_bad_value);
8775 ret = FALSE;
8776 }
8777 else
8778 {
8779 asection *osec;
8780
8781 /* We are turning this relocation into one
8782 against a section symbol. It would be
8783 proper to subtract the symbol's value,
8784 osec->vma, from the emitted reloc addend,
8785 but ld.so expects buggy relocs.
8786 FIXME: Why not always use a zero index? */
8787 osec = sec->output_section;
8788 indx = elf_section_data (osec)->dynindx;
8789 if (indx == 0)
8790 {
8791 osec = htab->elf.text_index_section;
8792 indx = elf_section_data (osec)->dynindx;
8793 }
8794 BFD_ASSERT (indx != 0);
8795 #ifdef DEBUG
8796 if (indx == 0)
8797 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8798 indx, osec->name, osec->flags,
8799 h->root.root.string);
8800 #endif
8801 }
8802
8803 outrel.r_info = ELF32_R_INFO (indx, r_type);
8804 }
8805 else if (ifunc != NULL)
8806 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8807 else
8808 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8809 }
8810
8811 loc = sreloc->contents;
8812 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8813 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8814
8815 if (skip == -1)
8816 goto copy_reloc;
8817
8818 /* This reloc will be computed at runtime. We clear the memory
8819 so that it contains predictable value. */
8820 if (! skip
8821 && ((input_section->flags & SEC_ALLOC) != 0
8822 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8823 {
8824 relocation = howto->pc_relative ? outrel.r_offset : 0;
8825 addend = 0;
8826 break;
8827 }
8828 }
8829 break;
8830
8831 case R_PPC_RELAX_PLT:
8832 case R_PPC_RELAX_PLTREL24:
8833 if (h != NULL)
8834 {
8835 struct plt_entry *ent;
8836 bfd_vma got2_addend = 0;
8837
8838 if (r_type == R_PPC_RELAX_PLTREL24)
8839 {
8840 if (bfd_link_pic (info))
8841 got2_addend = addend;
8842 addend = 0;
8843 }
8844 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8845 if (htab->plt_type == PLT_NEW)
8846 relocation = (htab->glink->output_section->vma
8847 + htab->glink->output_offset
8848 + ent->glink_offset);
8849 else
8850 relocation = (htab->plt->output_section->vma
8851 + htab->plt->output_offset
8852 + ent->plt.offset);
8853 }
8854 /* Fall thru */
8855
8856 case R_PPC_RELAX:
8857 {
8858 const int *stub;
8859 size_t size;
8860 size_t insn_offset = rel->r_offset;
8861 unsigned int insn;
8862
8863 if (bfd_link_pic (info))
8864 {
8865 relocation -= (input_section->output_section->vma
8866 + input_section->output_offset
8867 + rel->r_offset - 4);
8868 stub = shared_stub_entry;
8869 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8870 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8871 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8872 stub += 3;
8873 size = ARRAY_SIZE (shared_stub_entry) - 3;
8874 }
8875 else
8876 {
8877 stub = stub_entry;
8878 size = ARRAY_SIZE (stub_entry);
8879 }
8880
8881 relocation += addend;
8882 if (bfd_link_relocatable (info))
8883 relocation = 0;
8884
8885 /* First insn is HA, second is LO. */
8886 insn = *stub++;
8887 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8888 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8889 insn_offset += 4;
8890
8891 insn = *stub++;
8892 insn |= relocation & 0xffff;
8893 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8894 insn_offset += 4;
8895 size -= 2;
8896
8897 while (size != 0)
8898 {
8899 insn = *stub++;
8900 --size;
8901 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8902 insn_offset += 4;
8903 }
8904
8905 /* Rewrite the reloc and convert one of the trailing nop
8906 relocs to describe this relocation. */
8907 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8908 /* The relocs are at the bottom 2 bytes */
8909 wrel->r_offset = rel->r_offset + d_offset;
8910 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8911 wrel->r_addend = rel->r_addend;
8912 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8913 wrel++, rel++;
8914 wrel->r_offset += 4;
8915 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8916 }
8917 continue;
8918
8919 /* Indirect .sdata relocation. */
8920 case R_PPC_EMB_SDAI16:
8921 BFD_ASSERT (htab->sdata[0].section != NULL);
8922 if (!is_static_defined (htab->sdata[0].sym))
8923 {
8924 unresolved_reloc = TRUE;
8925 break;
8926 }
8927 relocation
8928 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8929 h, relocation, rel);
8930 addend = 0;
8931 break;
8932
8933 /* Indirect .sdata2 relocation. */
8934 case R_PPC_EMB_SDA2I16:
8935 BFD_ASSERT (htab->sdata[1].section != NULL);
8936 if (!is_static_defined (htab->sdata[1].sym))
8937 {
8938 unresolved_reloc = TRUE;
8939 break;
8940 }
8941 relocation
8942 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8943 h, relocation, rel);
8944 addend = 0;
8945 break;
8946
8947 /* Handle the TOC16 reloc. We want to use the offset within the .got
8948 section, not the actual VMA. This is appropriate when generating
8949 an embedded ELF object, for which the .got section acts like the
8950 AIX .toc section. */
8951 case R_PPC_TOC16: /* phony GOT16 relocations */
8952 if (sec == NULL || sec->output_section == NULL)
8953 {
8954 unresolved_reloc = TRUE;
8955 break;
8956 }
8957 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8958 ".got") == 0
8959 || strcmp (bfd_get_section_name (sec->owner, sec),
8960 ".cgot") == 0);
8961
8962 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8963 break;
8964
8965 case R_PPC_PLTREL24:
8966 if (h != NULL && ifunc == NULL)
8967 {
8968 struct plt_entry *ent;
8969
8970 ent = find_plt_ent (&h->plt.plist, got2,
8971 bfd_link_pic (info) ? addend : 0);
8972 if (ent == NULL
8973 || htab->plt == NULL)
8974 {
8975 /* We didn't make a PLT entry for this symbol. This
8976 happens when statically linking PIC code, or when
8977 using -Bsymbolic. */
8978 }
8979 else
8980 {
8981 /* Relocation is to the entry for this symbol in the
8982 procedure linkage table. */
8983 unresolved_reloc = FALSE;
8984 if (htab->plt_type == PLT_NEW)
8985 relocation = (htab->glink->output_section->vma
8986 + htab->glink->output_offset
8987 + ent->glink_offset);
8988 else
8989 relocation = (htab->plt->output_section->vma
8990 + htab->plt->output_offset
8991 + ent->plt.offset);
8992 }
8993 }
8994
8995 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8996 addend specifies the GOT pointer offset within .got2.
8997 Don't apply it to the relocation field. */
8998 addend = 0;
8999 break;
9000
9001 /* Relocate against _SDA_BASE_. */
9002 case R_PPC_SDAREL16:
9003 {
9004 const char *name;
9005 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9006
9007 if (sec == NULL
9008 || sec->output_section == NULL
9009 || !is_static_defined (sda))
9010 {
9011 unresolved_reloc = TRUE;
9012 break;
9013 }
9014 addend -= SYM_VAL (sda);
9015
9016 name = bfd_get_section_name (output_bfd, sec->output_section);
9017 if (!(strcmp (name, ".sdata") == 0
9018 || strcmp (name, ".sbss") == 0))
9019 {
9020 info->callbacks->einfo
9021 (_("%P: %B: the target (%s) of a %s relocation is "
9022 "in the wrong output section (%s)\n"),
9023 input_bfd,
9024 sym_name,
9025 howto->name,
9026 name);
9027 }
9028 }
9029 break;
9030
9031 /* Relocate against _SDA2_BASE_. */
9032 case R_PPC_EMB_SDA2REL:
9033 {
9034 const char *name;
9035 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9036
9037 if (sec == NULL
9038 || sec->output_section == NULL
9039 || !is_static_defined (sda))
9040 {
9041 unresolved_reloc = TRUE;
9042 break;
9043 }
9044 addend -= SYM_VAL (sda);
9045
9046 name = bfd_get_section_name (output_bfd, sec->output_section);
9047 if (!(strcmp (name, ".sdata2") == 0
9048 || strcmp (name, ".sbss2") == 0))
9049 {
9050 info->callbacks->einfo
9051 (_("%P: %B: the target (%s) of a %s relocation is "
9052 "in the wrong output section (%s)\n"),
9053 input_bfd,
9054 sym_name,
9055 howto->name,
9056 name);
9057 }
9058 }
9059 break;
9060
9061 case R_PPC_VLE_LO16A:
9062 relocation = relocation + addend;
9063 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9064 relocation, split16a_type);
9065 goto copy_reloc;
9066
9067 case R_PPC_VLE_LO16D:
9068 relocation = relocation + addend;
9069 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9070 relocation, split16d_type);
9071 goto copy_reloc;
9072
9073 case R_PPC_VLE_HI16A:
9074 relocation = (relocation + addend) >> 16;
9075 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9076 relocation, split16a_type);
9077 goto copy_reloc;
9078
9079 case R_PPC_VLE_HI16D:
9080 relocation = (relocation + addend) >> 16;
9081 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9082 relocation, split16d_type);
9083 goto copy_reloc;
9084
9085 case R_PPC_VLE_HA16A:
9086 relocation = (relocation + addend + 0x8000) >> 16;
9087 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9088 relocation, split16a_type);
9089 goto copy_reloc;
9090
9091 case R_PPC_VLE_HA16D:
9092 relocation = (relocation + addend + 0x8000) >> 16;
9093 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9094 relocation, split16d_type);
9095 goto copy_reloc;
9096
9097 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9098 case R_PPC_EMB_SDA21:
9099 case R_PPC_VLE_SDA21:
9100 case R_PPC_EMB_RELSDA:
9101 case R_PPC_VLE_SDA21_LO:
9102 {
9103 const char *name;
9104 int reg;
9105 unsigned int insn;
9106 struct elf_link_hash_entry *sda = NULL;
9107
9108 if (sec == NULL || sec->output_section == NULL)
9109 {
9110 unresolved_reloc = TRUE;
9111 break;
9112 }
9113
9114 name = bfd_get_section_name (output_bfd, sec->output_section);
9115 if (strcmp (name, ".sdata") == 0
9116 || strcmp (name, ".sbss") == 0)
9117 {
9118 reg = 13;
9119 sda = htab->sdata[0].sym;
9120 }
9121 else if (strcmp (name, ".sdata2") == 0
9122 || strcmp (name, ".sbss2") == 0)
9123 {
9124 reg = 2;
9125 sda = htab->sdata[1].sym;
9126 }
9127 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9128 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9129 {
9130 reg = 0;
9131 }
9132 else
9133 {
9134 info->callbacks->einfo
9135 (_("%P: %B: the target (%s) of a %s relocation is "
9136 "in the wrong output section (%s)\n"),
9137 input_bfd,
9138 sym_name,
9139 howto->name,
9140 name);
9141
9142 bfd_set_error (bfd_error_bad_value);
9143 ret = FALSE;
9144 goto copy_reloc;
9145 }
9146
9147 if (sda != NULL)
9148 {
9149 if (!is_static_defined (sda))
9150 {
9151 unresolved_reloc = TRUE;
9152 break;
9153 }
9154 addend -= SYM_VAL (sda);
9155 }
9156
9157 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9158 if (reg == 0
9159 && (r_type == R_PPC_VLE_SDA21
9160 || r_type == R_PPC_VLE_SDA21_LO))
9161 {
9162 relocation = relocation + addend;
9163 addend = 0;
9164
9165 /* Force e_li insn, keeping RT from original insn. */
9166 insn &= 0x1f << 21;
9167 insn |= 28u << 26;
9168
9169 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9170 /* Top 4 bits of value to 17..20. */
9171 insn |= (relocation & 0xf0000) >> 5;
9172 /* Next 5 bits of the value to 11..15. */
9173 insn |= (relocation & 0xf800) << 5;
9174 /* And the final 11 bits of the value to bits 21 to 31. */
9175 insn |= relocation & 0x7ff;
9176
9177 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9178
9179 if (r_type == R_PPC_VLE_SDA21
9180 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9181 goto overflow;
9182 goto copy_reloc;
9183 }
9184 else if (r_type == R_PPC_EMB_SDA21
9185 || r_type == R_PPC_VLE_SDA21
9186 || r_type == R_PPC_VLE_SDA21_LO)
9187 {
9188 /* Fill in register field. */
9189 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9190 }
9191 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9192 }
9193 break;
9194
9195 case R_PPC_VLE_SDAREL_LO16A:
9196 case R_PPC_VLE_SDAREL_LO16D:
9197 case R_PPC_VLE_SDAREL_HI16A:
9198 case R_PPC_VLE_SDAREL_HI16D:
9199 case R_PPC_VLE_SDAREL_HA16A:
9200 case R_PPC_VLE_SDAREL_HA16D:
9201 {
9202 bfd_vma value;
9203 const char *name;
9204 //int reg;
9205 struct elf_link_hash_entry *sda = NULL;
9206
9207 if (sec == NULL || sec->output_section == NULL)
9208 {
9209 unresolved_reloc = TRUE;
9210 break;
9211 }
9212
9213 name = bfd_get_section_name (output_bfd, sec->output_section);
9214 if (strcmp (name, ".sdata") == 0
9215 || strcmp (name, ".sbss") == 0)
9216 {
9217 //reg = 13;
9218 sda = htab->sdata[0].sym;
9219 }
9220 else if (strcmp (name, ".sdata2") == 0
9221 || strcmp (name, ".sbss2") == 0)
9222 {
9223 //reg = 2;
9224 sda = htab->sdata[1].sym;
9225 }
9226 else
9227 {
9228 (*_bfd_error_handler)
9229 (_("%B: the target (%s) of a %s relocation is "
9230 "in the wrong output section (%s)"),
9231 input_bfd,
9232 sym_name,
9233 howto->name,
9234 name);
9235
9236 bfd_set_error (bfd_error_bad_value);
9237 ret = FALSE;
9238 goto copy_reloc;
9239 }
9240
9241 if (sda != NULL)
9242 {
9243 if (!is_static_defined (sda))
9244 {
9245 unresolved_reloc = TRUE;
9246 break;
9247 }
9248 }
9249
9250 value = (sda->root.u.def.section->output_section->vma
9251 + sda->root.u.def.section->output_offset
9252 + addend);
9253
9254 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9255 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9256 value, split16a_type);
9257 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9258 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9259 value, split16d_type);
9260 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9261 {
9262 value = value >> 16;
9263 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9264 value, split16a_type);
9265 }
9266 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9267 {
9268 value = value >> 16;
9269 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9270 value, split16d_type);
9271 }
9272 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9273 {
9274 value = (value + 0x8000) >> 16;
9275 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9276 value, split16a_type);
9277 }
9278 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9279 {
9280 value = (value + 0x8000) >> 16;
9281 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9282 value, split16d_type);
9283 }
9284 }
9285 goto copy_reloc;
9286
9287 /* Relocate against the beginning of the section. */
9288 case R_PPC_SECTOFF:
9289 case R_PPC_SECTOFF_LO:
9290 case R_PPC_SECTOFF_HI:
9291 case R_PPC_SECTOFF_HA:
9292 if (sec == NULL || sec->output_section == NULL)
9293 {
9294 unresolved_reloc = TRUE;
9295 break;
9296 }
9297 addend -= sec->output_section->vma;
9298 break;
9299
9300 /* Negative relocations. */
9301 case R_PPC_EMB_NADDR32:
9302 case R_PPC_EMB_NADDR16:
9303 case R_PPC_EMB_NADDR16_LO:
9304 case R_PPC_EMB_NADDR16_HI:
9305 case R_PPC_EMB_NADDR16_HA:
9306 addend -= 2 * relocation;
9307 break;
9308
9309 case R_PPC_COPY:
9310 case R_PPC_GLOB_DAT:
9311 case R_PPC_JMP_SLOT:
9312 case R_PPC_RELATIVE:
9313 case R_PPC_IRELATIVE:
9314 case R_PPC_PLT32:
9315 case R_PPC_PLTREL32:
9316 case R_PPC_PLT16_LO:
9317 case R_PPC_PLT16_HI:
9318 case R_PPC_PLT16_HA:
9319 case R_PPC_ADDR30:
9320 case R_PPC_EMB_RELSEC16:
9321 case R_PPC_EMB_RELST_LO:
9322 case R_PPC_EMB_RELST_HI:
9323 case R_PPC_EMB_RELST_HA:
9324 case R_PPC_EMB_BIT_FLD:
9325 info->callbacks->einfo
9326 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9327 input_bfd,
9328 howto->name,
9329 sym_name);
9330
9331 bfd_set_error (bfd_error_invalid_operation);
9332 ret = FALSE;
9333 goto copy_reloc;
9334 }
9335
9336 /* Do any further special processing. */
9337 switch (r_type)
9338 {
9339 default:
9340 break;
9341
9342 case R_PPC_ADDR16_HA:
9343 case R_PPC_REL16_HA:
9344 case R_PPC_REL16DX_HA:
9345 case R_PPC_SECTOFF_HA:
9346 case R_PPC_TPREL16_HA:
9347 case R_PPC_DTPREL16_HA:
9348 case R_PPC_EMB_NADDR16_HA:
9349 case R_PPC_EMB_RELST_HA:
9350 /* It's just possible that this symbol is a weak symbol
9351 that's not actually defined anywhere. In that case,
9352 'sec' would be NULL, and we should leave the symbol
9353 alone (it will be set to zero elsewhere in the link). */
9354 if (sec == NULL)
9355 break;
9356 /* Fall thru */
9357
9358 case R_PPC_PLT16_HA:
9359 case R_PPC_GOT16_HA:
9360 case R_PPC_GOT_TLSGD16_HA:
9361 case R_PPC_GOT_TLSLD16_HA:
9362 case R_PPC_GOT_TPREL16_HA:
9363 case R_PPC_GOT_DTPREL16_HA:
9364 /* Add 0x10000 if sign bit in 0:15 is set.
9365 Bits 0:15 are not used. */
9366 addend += 0x8000;
9367 break;
9368
9369 case R_PPC_ADDR16:
9370 case R_PPC_ADDR16_LO:
9371 case R_PPC_GOT16:
9372 case R_PPC_GOT16_LO:
9373 case R_PPC_SDAREL16:
9374 case R_PPC_SECTOFF:
9375 case R_PPC_SECTOFF_LO:
9376 case R_PPC_DTPREL16:
9377 case R_PPC_DTPREL16_LO:
9378 case R_PPC_TPREL16:
9379 case R_PPC_TPREL16_LO:
9380 case R_PPC_GOT_TLSGD16:
9381 case R_PPC_GOT_TLSGD16_LO:
9382 case R_PPC_GOT_TLSLD16:
9383 case R_PPC_GOT_TLSLD16_LO:
9384 case R_PPC_GOT_DTPREL16:
9385 case R_PPC_GOT_DTPREL16_LO:
9386 case R_PPC_GOT_TPREL16:
9387 case R_PPC_GOT_TPREL16_LO:
9388 {
9389 /* The 32-bit ABI lacks proper relocations to deal with
9390 certain 64-bit instructions. Prevent damage to bits
9391 that make up part of the insn opcode. */
9392 unsigned int insn, mask, lobit;
9393
9394 insn = bfd_get_32 (output_bfd,
9395 contents + rel->r_offset - d_offset);
9396 mask = 0;
9397 if (is_insn_ds_form (insn))
9398 mask = 3;
9399 else if (is_insn_dq_form (insn))
9400 mask = 15;
9401 else
9402 break;
9403 relocation += addend;
9404 addend = insn & mask;
9405 lobit = mask & relocation;
9406 if (lobit != 0)
9407 {
9408 relocation ^= lobit;
9409 info->callbacks->einfo
9410 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9411 input_bfd, input_section, rel->r_offset,
9412 howto->name, sym_name, mask + 1);
9413 bfd_set_error (bfd_error_bad_value);
9414 ret = FALSE;
9415 }
9416 }
9417 break;
9418 }
9419
9420 #ifdef DEBUG
9421 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9422 "offset = %ld, addend = %ld\n",
9423 howto->name,
9424 (int) r_type,
9425 sym_name,
9426 r_symndx,
9427 (long) rel->r_offset,
9428 (long) addend);
9429 #endif
9430
9431 if (unresolved_reloc
9432 && !((input_section->flags & SEC_DEBUGGING) != 0
9433 && h->def_dynamic)
9434 && _bfd_elf_section_offset (output_bfd, info, input_section,
9435 rel->r_offset) != (bfd_vma) -1)
9436 {
9437 info->callbacks->einfo
9438 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9439 input_bfd, input_section, rel->r_offset,
9440 howto->name,
9441 sym_name);
9442 ret = FALSE;
9443 }
9444
9445 /* 16-bit fields in insns mostly have signed values, but a
9446 few insns have 16-bit unsigned values. Really, we should
9447 have different reloc types. */
9448 if (howto->complain_on_overflow != complain_overflow_dont
9449 && howto->dst_mask == 0xffff
9450 && (input_section->flags & SEC_CODE) != 0)
9451 {
9452 enum complain_overflow complain = complain_overflow_signed;
9453
9454 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9455 {
9456 unsigned int insn;
9457
9458 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9459 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9460 complain = complain_overflow_bitfield;
9461 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9462 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9463 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9464 complain = complain_overflow_unsigned;
9465 }
9466 if (howto->complain_on_overflow != complain)
9467 {
9468 alt_howto = *howto;
9469 alt_howto.complain_on_overflow = complain;
9470 howto = &alt_howto;
9471 }
9472 }
9473
9474 if (r_type == R_PPC_REL16DX_HA)
9475 {
9476 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9477 if (rel->r_offset + 4 > input_section->size)
9478 r = bfd_reloc_outofrange;
9479 else
9480 {
9481 unsigned int insn;
9482
9483 relocation += addend;
9484 relocation -= (rel->r_offset
9485 + input_section->output_offset
9486 + input_section->output_section->vma);
9487 relocation >>= 16;
9488 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9489 insn &= ~0x1fffc1;
9490 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9491 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9492 r = bfd_reloc_ok;
9493 }
9494 }
9495 else
9496 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9497 rel->r_offset, relocation, addend);
9498
9499 if (r != bfd_reloc_ok)
9500 {
9501 if (r == bfd_reloc_overflow)
9502 {
9503 overflow:
9504 /* On code like "if (foo) foo();" don't report overflow
9505 on a branch to zero when foo is undefined. */
9506 if (!warned
9507 && !(h != NULL
9508 && (h->root.type == bfd_link_hash_undefweak
9509 || h->root.type == bfd_link_hash_undefined)
9510 && is_branch_reloc (r_type)))
9511 info->callbacks->reloc_overflow
9512 (info, (h ? &h->root : NULL), sym_name, howto->name,
9513 rel->r_addend, input_bfd, input_section, rel->r_offset);
9514 }
9515 else
9516 {
9517 info->callbacks->einfo
9518 (_("%P: %H: %s reloc against `%s': error %d\n"),
9519 input_bfd, input_section, rel->r_offset,
9520 howto->name, sym_name, (int) r);
9521 ret = FALSE;
9522 }
9523 }
9524 copy_reloc:
9525 if (wrel != rel)
9526 *wrel = *rel;
9527 }
9528
9529 if (wrel != rel)
9530 {
9531 Elf_Internal_Shdr *rel_hdr;
9532 size_t deleted = rel - wrel;
9533
9534 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9535 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9536 if (rel_hdr->sh_size == 0)
9537 {
9538 /* It is too late to remove an empty reloc section. Leave
9539 one NONE reloc.
9540 ??? What is wrong with an empty section??? */
9541 rel_hdr->sh_size = rel_hdr->sh_entsize;
9542 deleted -= 1;
9543 wrel++;
9544 }
9545 relend = wrel;
9546 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9547 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9548 input_section->reloc_count -= deleted;
9549 }
9550
9551 #ifdef DEBUG
9552 fprintf (stderr, "\n");
9553 #endif
9554
9555 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9556 && input_section->size != input_section->rawsize
9557 && (strcmp (input_section->output_section->name, ".init") == 0
9558 || strcmp (input_section->output_section->name, ".fini") == 0))
9559 {
9560 /* Branch around the trampolines. */
9561 unsigned int insn = B + input_section->size - input_section->rawsize;
9562 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9563 }
9564
9565 if (htab->params->ppc476_workaround
9566 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9567 && (!bfd_link_relocatable (info)
9568 || (input_section->output_section->alignment_power
9569 >= htab->params->pagesize_p2)))
9570 {
9571 bfd_vma start_addr, end_addr, addr;
9572 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9573
9574 if (relax_info->workaround_size != 0)
9575 {
9576 bfd_byte *p;
9577 unsigned int n;
9578 bfd_byte fill[4];
9579
9580 bfd_put_32 (input_bfd, BA, fill);
9581 p = contents + input_section->size - relax_info->workaround_size;
9582 n = relax_info->workaround_size >> 2;
9583 while (n--)
9584 {
9585 memcpy (p, fill, 4);
9586 p += 4;
9587 }
9588 }
9589
9590 /* The idea is: Replace the last instruction on a page with a
9591 branch to a patch area. Put the insn there followed by a
9592 branch back to the next page. Complicated a little by
9593 needing to handle moved conditional branches, and by not
9594 wanting to touch data-in-text. */
9595
9596 start_addr = (input_section->output_section->vma
9597 + input_section->output_offset);
9598 end_addr = (start_addr + input_section->size
9599 - relax_info->workaround_size);
9600 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9601 addr < end_addr;
9602 addr += pagesize)
9603 {
9604 bfd_vma offset = addr - start_addr;
9605 Elf_Internal_Rela *lo, *hi;
9606 bfd_boolean is_data;
9607 bfd_vma patch_off, patch_addr;
9608 unsigned int insn;
9609
9610 /* Do we have a data reloc at this offset? If so, leave
9611 the word alone. */
9612 is_data = FALSE;
9613 lo = relocs;
9614 hi = relend;
9615 rel = NULL;
9616 while (lo < hi)
9617 {
9618 rel = lo + (hi - lo) / 2;
9619 if (rel->r_offset < offset)
9620 lo = rel + 1;
9621 else if (rel->r_offset > offset + 3)
9622 hi = rel;
9623 else
9624 {
9625 switch (ELF32_R_TYPE (rel->r_info))
9626 {
9627 case R_PPC_ADDR32:
9628 case R_PPC_UADDR32:
9629 case R_PPC_REL32:
9630 case R_PPC_ADDR30:
9631 is_data = TRUE;
9632 break;
9633 default:
9634 break;
9635 }
9636 break;
9637 }
9638 }
9639 if (is_data)
9640 continue;
9641
9642 /* Some instructions can be left alone too. Unconditional
9643 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9644 avoid the icache failure.
9645
9646 The problem occurs due to prefetch across a page boundary
9647 where stale instructions can be fetched from the next
9648 page, and the mechanism for flushing these bad
9649 instructions fails under certain circumstances. The
9650 unconditional branches:
9651 1) Branch: b, bl, ba, bla,
9652 2) Branch Conditional: bc, bca, bcl, bcla,
9653 3) Branch Conditional to Link Register: bclr, bclrl,
9654 where (2) and (3) have BO=0x14 making them unconditional,
9655 prevent the bad prefetch because the prefetch itself is
9656 affected by these instructions. This happens even if the
9657 instruction is not executed.
9658
9659 A bctr example:
9660 .
9661 . lis 9,new_page@ha
9662 . addi 9,9,new_page@l
9663 . mtctr 9
9664 . bctr
9665 . nop
9666 . nop
9667 . new_page:
9668 .
9669 The bctr is not predicted taken due to ctr not being
9670 ready, so prefetch continues on past the bctr into the
9671 new page which might have stale instructions. If they
9672 fail to be flushed, then they will be executed after the
9673 bctr executes. Either of the following modifications
9674 prevent the bad prefetch from happening in the first
9675 place:
9676 .
9677 . lis 9,new_page@ha lis 9,new_page@ha
9678 . addi 9,9,new_page@l addi 9,9,new_page@l
9679 . mtctr 9 mtctr 9
9680 . bctr bctr
9681 . nop b somewhere_else
9682 . b somewhere_else nop
9683 . new_page: new_page:
9684 . */
9685 insn = bfd_get_32 (input_bfd, contents + offset);
9686 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9687 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9688 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9689 || ((insn & (0x3f << 26)) == (19u << 26)
9690 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9691 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9692 continue;
9693
9694 patch_addr = (start_addr + input_section->size
9695 - relax_info->workaround_size);
9696 patch_addr = (patch_addr + 15) & -16;
9697 patch_off = patch_addr - start_addr;
9698 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9699
9700 if (rel != NULL
9701 && rel->r_offset >= offset
9702 && rel->r_offset < offset + 4)
9703 {
9704 asection *sreloc;
9705
9706 /* If the insn we are patching had a reloc, adjust the
9707 reloc r_offset so that the reloc applies to the moved
9708 location. This matters for -r and --emit-relocs. */
9709 if (rel + 1 != relend)
9710 {
9711 Elf_Internal_Rela tmp = *rel;
9712
9713 /* Keep the relocs sorted by r_offset. */
9714 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9715 relend[-1] = tmp;
9716 }
9717 relend[-1].r_offset += patch_off - offset;
9718
9719 /* Adjust REL16 addends too. */
9720 switch (ELF32_R_TYPE (relend[-1].r_info))
9721 {
9722 case R_PPC_REL16:
9723 case R_PPC_REL16_LO:
9724 case R_PPC_REL16_HI:
9725 case R_PPC_REL16_HA:
9726 relend[-1].r_addend += patch_off - offset;
9727 break;
9728 default:
9729 break;
9730 }
9731
9732 /* If we are building a PIE or shared library with
9733 non-PIC objects, perhaps we had a dynamic reloc too?
9734 If so, the dynamic reloc must move with the insn. */
9735 sreloc = elf_section_data (input_section)->sreloc;
9736 if (sreloc != NULL)
9737 {
9738 Elf32_External_Rela *slo, *shi, *srelend;
9739 bfd_vma soffset;
9740
9741 slo = (Elf32_External_Rela *) sreloc->contents;
9742 shi = srelend = slo + sreloc->reloc_count;
9743 soffset = (offset + input_section->output_section->vma
9744 + input_section->output_offset);
9745 while (slo < shi)
9746 {
9747 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9748 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9749 &outrel);
9750 if (outrel.r_offset < soffset)
9751 slo = srel + 1;
9752 else if (outrel.r_offset > soffset + 3)
9753 shi = srel;
9754 else
9755 {
9756 if (srel + 1 != srelend)
9757 {
9758 memmove (srel, srel + 1,
9759 (srelend - (srel + 1)) * sizeof (*srel));
9760 srel = srelend - 1;
9761 }
9762 outrel.r_offset += patch_off - offset;
9763 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9764 (bfd_byte *) srel);
9765 break;
9766 }
9767 }
9768 }
9769 }
9770 else
9771 rel = NULL;
9772
9773 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9774 && (insn & 2) == 0 /* relative */)
9775 {
9776 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9777
9778 delta += offset - patch_off;
9779 if (bfd_link_relocatable (info) && rel != NULL)
9780 delta = 0;
9781 if (!bfd_link_relocatable (info) && rel != NULL)
9782 {
9783 enum elf_ppc_reloc_type r_type;
9784
9785 r_type = ELF32_R_TYPE (relend[-1].r_info);
9786 if (r_type == R_PPC_REL14_BRTAKEN)
9787 insn |= BRANCH_PREDICT_BIT;
9788 else if (r_type == R_PPC_REL14_BRNTAKEN)
9789 insn &= ~BRANCH_PREDICT_BIT;
9790 else
9791 BFD_ASSERT (r_type == R_PPC_REL14);
9792
9793 if ((r_type == R_PPC_REL14_BRTAKEN
9794 || r_type == R_PPC_REL14_BRNTAKEN)
9795 && delta + 0x8000 < 0x10000
9796 && (bfd_signed_vma) delta < 0)
9797 insn ^= BRANCH_PREDICT_BIT;
9798 }
9799 if (delta + 0x8000 < 0x10000)
9800 {
9801 bfd_put_32 (input_bfd,
9802 (insn & ~0xfffc) | (delta & 0xfffc),
9803 contents + patch_off);
9804 patch_off += 4;
9805 bfd_put_32 (input_bfd,
9806 B | ((offset + 4 - patch_off) & 0x3fffffc),
9807 contents + patch_off);
9808 patch_off += 4;
9809 }
9810 else
9811 {
9812 if (rel != NULL)
9813 {
9814 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9815
9816 relend[-1].r_offset += 8;
9817 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9818 }
9819 bfd_put_32 (input_bfd,
9820 (insn & ~0xfffc) | 8,
9821 contents + patch_off);
9822 patch_off += 4;
9823 bfd_put_32 (input_bfd,
9824 B | ((offset + 4 - patch_off) & 0x3fffffc),
9825 contents + patch_off);
9826 patch_off += 4;
9827 bfd_put_32 (input_bfd,
9828 B | ((delta - 8) & 0x3fffffc),
9829 contents + patch_off);
9830 patch_off += 4;
9831 }
9832 }
9833 else
9834 {
9835 bfd_put_32 (input_bfd, insn, contents + patch_off);
9836 patch_off += 4;
9837 bfd_put_32 (input_bfd,
9838 B | ((offset + 4 - patch_off) & 0x3fffffc),
9839 contents + patch_off);
9840 patch_off += 4;
9841 }
9842 BFD_ASSERT (patch_off <= input_section->size);
9843 relax_info->workaround_size = input_section->size - patch_off;
9844 }
9845 }
9846
9847 return ret;
9848 }
9849 \f
9850 /* Finish up dynamic symbol handling. We set the contents of various
9851 dynamic sections here. */
9852
9853 static bfd_boolean
9854 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9855 struct bfd_link_info *info,
9856 struct elf_link_hash_entry *h,
9857 Elf_Internal_Sym *sym)
9858 {
9859 struct ppc_elf_link_hash_table *htab;
9860 struct plt_entry *ent;
9861 bfd_boolean doneone;
9862
9863 #ifdef DEBUG
9864 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9865 h->root.root.string);
9866 #endif
9867
9868 htab = ppc_elf_hash_table (info);
9869 BFD_ASSERT (htab->elf.dynobj != NULL);
9870
9871 doneone = FALSE;
9872 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9873 if (ent->plt.offset != (bfd_vma) -1)
9874 {
9875 if (!doneone)
9876 {
9877 Elf_Internal_Rela rela;
9878 bfd_byte *loc;
9879 bfd_vma reloc_index;
9880
9881 if (htab->plt_type == PLT_NEW
9882 || !htab->elf.dynamic_sections_created
9883 || h->dynindx == -1)
9884 reloc_index = ent->plt.offset / 4;
9885 else
9886 {
9887 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9888 / htab->plt_slot_size);
9889 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9890 && htab->plt_type == PLT_OLD)
9891 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9892 }
9893
9894 /* This symbol has an entry in the procedure linkage table.
9895 Set it up. */
9896 if (htab->plt_type == PLT_VXWORKS
9897 && htab->elf.dynamic_sections_created
9898 && h->dynindx != -1)
9899 {
9900 bfd_vma got_offset;
9901 const bfd_vma *plt_entry;
9902
9903 /* The first three entries in .got.plt are reserved. */
9904 got_offset = (reloc_index + 3) * 4;
9905
9906 /* Use the right PLT. */
9907 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9908 : ppc_elf_vxworks_plt_entry;
9909
9910 /* Fill in the .plt on VxWorks. */
9911 if (bfd_link_pic (info))
9912 {
9913 bfd_put_32 (output_bfd,
9914 plt_entry[0] | PPC_HA (got_offset),
9915 htab->plt->contents + ent->plt.offset + 0);
9916 bfd_put_32 (output_bfd,
9917 plt_entry[1] | PPC_LO (got_offset),
9918 htab->plt->contents + ent->plt.offset + 4);
9919 }
9920 else
9921 {
9922 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9923
9924 bfd_put_32 (output_bfd,
9925 plt_entry[0] | PPC_HA (got_loc),
9926 htab->plt->contents + ent->plt.offset + 0);
9927 bfd_put_32 (output_bfd,
9928 plt_entry[1] | PPC_LO (got_loc),
9929 htab->plt->contents + ent->plt.offset + 4);
9930 }
9931
9932 bfd_put_32 (output_bfd, plt_entry[2],
9933 htab->plt->contents + ent->plt.offset + 8);
9934 bfd_put_32 (output_bfd, plt_entry[3],
9935 htab->plt->contents + ent->plt.offset + 12);
9936
9937 /* This instruction is an immediate load. The value loaded is
9938 the byte offset of the R_PPC_JMP_SLOT relocation from the
9939 start of the .rela.plt section. The value is stored in the
9940 low-order 16 bits of the load instruction. */
9941 /* NOTE: It appears that this is now an index rather than a
9942 prescaled offset. */
9943 bfd_put_32 (output_bfd,
9944 plt_entry[4] | reloc_index,
9945 htab->plt->contents + ent->plt.offset + 16);
9946 /* This instruction is a PC-relative branch whose target is
9947 the start of the PLT section. The address of this branch
9948 instruction is 20 bytes beyond the start of this PLT entry.
9949 The address is encoded in bits 6-29, inclusive. The value
9950 stored is right-shifted by two bits, permitting a 26-bit
9951 offset. */
9952 bfd_put_32 (output_bfd,
9953 (plt_entry[5]
9954 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9955 htab->plt->contents + ent->plt.offset + 20);
9956 bfd_put_32 (output_bfd, plt_entry[6],
9957 htab->plt->contents + ent->plt.offset + 24);
9958 bfd_put_32 (output_bfd, plt_entry[7],
9959 htab->plt->contents + ent->plt.offset + 28);
9960
9961 /* Fill in the GOT entry corresponding to this PLT slot with
9962 the address immediately after the "bctr" instruction
9963 in this PLT entry. */
9964 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9965 + htab->plt->output_offset
9966 + ent->plt.offset + 16),
9967 htab->sgotplt->contents + got_offset);
9968
9969 if (!bfd_link_pic (info))
9970 {
9971 /* Fill in a couple of entries in .rela.plt.unloaded. */
9972 loc = htab->srelplt2->contents
9973 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9974 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9975 * sizeof (Elf32_External_Rela));
9976
9977 /* Provide the @ha relocation for the first instruction. */
9978 rela.r_offset = (htab->plt->output_section->vma
9979 + htab->plt->output_offset
9980 + ent->plt.offset + 2);
9981 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9982 R_PPC_ADDR16_HA);
9983 rela.r_addend = got_offset;
9984 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9985 loc += sizeof (Elf32_External_Rela);
9986
9987 /* Provide the @l relocation for the second instruction. */
9988 rela.r_offset = (htab->plt->output_section->vma
9989 + htab->plt->output_offset
9990 + ent->plt.offset + 6);
9991 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9992 R_PPC_ADDR16_LO);
9993 rela.r_addend = got_offset;
9994 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9995 loc += sizeof (Elf32_External_Rela);
9996
9997 /* Provide a relocation for the GOT entry corresponding to this
9998 PLT slot. Point it at the middle of the .plt entry. */
9999 rela.r_offset = (htab->sgotplt->output_section->vma
10000 + htab->sgotplt->output_offset
10001 + got_offset);
10002 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10003 R_PPC_ADDR32);
10004 rela.r_addend = ent->plt.offset + 16;
10005 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10006 }
10007
10008 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10009 In particular, the offset for the relocation is not the
10010 address of the PLT entry for this function, as specified
10011 by the ABI. Instead, the offset is set to the address of
10012 the GOT slot for this function. See EABI 4.4.4.1. */
10013 rela.r_offset = (htab->sgotplt->output_section->vma
10014 + htab->sgotplt->output_offset
10015 + got_offset);
10016
10017 }
10018 else
10019 {
10020 asection *splt = htab->plt;
10021 if (!htab->elf.dynamic_sections_created
10022 || h->dynindx == -1)
10023 splt = htab->iplt;
10024
10025 rela.r_offset = (splt->output_section->vma
10026 + splt->output_offset
10027 + ent->plt.offset);
10028 if (htab->plt_type == PLT_OLD
10029 || !htab->elf.dynamic_sections_created
10030 || h->dynindx == -1)
10031 {
10032 /* We don't need to fill in the .plt. The ppc dynamic
10033 linker will fill it in. */
10034 }
10035 else
10036 {
10037 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10038 + htab->glink->output_section->vma
10039 + htab->glink->output_offset);
10040 bfd_put_32 (output_bfd, val,
10041 splt->contents + ent->plt.offset);
10042 }
10043 }
10044
10045 /* Fill in the entry in the .rela.plt section. */
10046 rela.r_addend = 0;
10047 if (!htab->elf.dynamic_sections_created
10048 || h->dynindx == -1)
10049 {
10050 BFD_ASSERT (h->type == STT_GNU_IFUNC
10051 && h->def_regular
10052 && (h->root.type == bfd_link_hash_defined
10053 || h->root.type == bfd_link_hash_defweak));
10054 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10055 rela.r_addend = SYM_VAL (h);
10056 }
10057 else
10058 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10059
10060 if (!htab->elf.dynamic_sections_created
10061 || h->dynindx == -1)
10062 loc = (htab->reliplt->contents
10063 + (htab->reliplt->reloc_count++
10064 * sizeof (Elf32_External_Rela)));
10065 else
10066 loc = (htab->relplt->contents
10067 + reloc_index * sizeof (Elf32_External_Rela));
10068 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10069
10070 if (!h->def_regular)
10071 {
10072 /* Mark the symbol as undefined, rather than as
10073 defined in the .plt section. Leave the value if
10074 there were any relocations where pointer equality
10075 matters (this is a clue for the dynamic linker, to
10076 make function pointer comparisons work between an
10077 application and shared library), otherwise set it
10078 to zero. */
10079 sym->st_shndx = SHN_UNDEF;
10080 if (!h->pointer_equality_needed)
10081 sym->st_value = 0;
10082 else if (!h->ref_regular_nonweak)
10083 {
10084 /* This breaks function pointer comparisons, but
10085 that is better than breaking tests for a NULL
10086 function pointer. */
10087 sym->st_value = 0;
10088 }
10089 }
10090 else if (h->type == STT_GNU_IFUNC
10091 && !bfd_link_pic (info))
10092 {
10093 /* Set the value of ifunc symbols in a non-pie
10094 executable to the glink entry. This is to avoid
10095 text relocations. We can't do this for ifunc in
10096 allocate_dynrelocs, as we do for normal dynamic
10097 function symbols with plt entries, because we need
10098 to keep the original value around for the ifunc
10099 relocation. */
10100 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10101 (output_bfd, htab->glink->output_section));
10102 sym->st_value = (ent->glink_offset
10103 + htab->glink->output_offset
10104 + htab->glink->output_section->vma);
10105 }
10106 doneone = TRUE;
10107 }
10108
10109 if (htab->plt_type == PLT_NEW
10110 || !htab->elf.dynamic_sections_created
10111 || h->dynindx == -1)
10112 {
10113 unsigned char *p;
10114 asection *splt = htab->plt;
10115 if (!htab->elf.dynamic_sections_created
10116 || h->dynindx == -1)
10117 splt = htab->iplt;
10118
10119 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10120
10121 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10122 {
10123 bfd_put_32 (output_bfd, LWZ_11_3, p);
10124 p += 4;
10125 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10126 p += 4;
10127 bfd_put_32 (output_bfd, MR_0_3, p);
10128 p += 4;
10129 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10130 p += 4;
10131 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10132 p += 4;
10133 bfd_put_32 (output_bfd, BEQLR, p);
10134 p += 4;
10135 bfd_put_32 (output_bfd, MR_3_0, p);
10136 p += 4;
10137 bfd_put_32 (output_bfd, NOP, p);
10138 p += 4;
10139 }
10140
10141 write_glink_stub (ent, splt, p, info);
10142
10143 if (!bfd_link_pic (info))
10144 /* We only need one non-PIC glink stub. */
10145 break;
10146 }
10147 else
10148 break;
10149 }
10150
10151 if (h->needs_copy)
10152 {
10153 asection *s;
10154 Elf_Internal_Rela rela;
10155 bfd_byte *loc;
10156
10157 /* This symbols needs a copy reloc. Set it up. */
10158
10159 #ifdef DEBUG
10160 fprintf (stderr, ", copy");
10161 #endif
10162
10163 BFD_ASSERT (h->dynindx != -1);
10164
10165 if (ppc_elf_hash_entry (h)->has_sda_refs)
10166 s = htab->relsbss;
10167 else
10168 s = htab->relbss;
10169 BFD_ASSERT (s != NULL);
10170
10171 rela.r_offset = SYM_VAL (h);
10172 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10173 rela.r_addend = 0;
10174 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10175 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10176 }
10177
10178 #ifdef DEBUG
10179 fprintf (stderr, "\n");
10180 #endif
10181
10182 return TRUE;
10183 }
10184 \f
10185 static enum elf_reloc_type_class
10186 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10187 const asection *rel_sec,
10188 const Elf_Internal_Rela *rela)
10189 {
10190 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10191
10192 if (rel_sec == htab->reliplt)
10193 return reloc_class_ifunc;
10194
10195 switch (ELF32_R_TYPE (rela->r_info))
10196 {
10197 case R_PPC_RELATIVE:
10198 return reloc_class_relative;
10199 case R_PPC_JMP_SLOT:
10200 return reloc_class_plt;
10201 case R_PPC_COPY:
10202 return reloc_class_copy;
10203 default:
10204 return reloc_class_normal;
10205 }
10206 }
10207 \f
10208 /* Finish up the dynamic sections. */
10209
10210 static bfd_boolean
10211 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10212 struct bfd_link_info *info)
10213 {
10214 asection *sdyn;
10215 asection *splt;
10216 struct ppc_elf_link_hash_table *htab;
10217 bfd_vma got;
10218 bfd *dynobj;
10219 bfd_boolean ret = TRUE;
10220
10221 #ifdef DEBUG
10222 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10223 #endif
10224
10225 htab = ppc_elf_hash_table (info);
10226 dynobj = elf_hash_table (info)->dynobj;
10227 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10228 if (htab->is_vxworks)
10229 splt = bfd_get_linker_section (dynobj, ".plt");
10230 else
10231 splt = NULL;
10232
10233 got = 0;
10234 if (htab->elf.hgot != NULL)
10235 got = SYM_VAL (htab->elf.hgot);
10236
10237 if (htab->elf.dynamic_sections_created)
10238 {
10239 Elf32_External_Dyn *dyncon, *dynconend;
10240
10241 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10242
10243 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10244 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10245 for (; dyncon < dynconend; dyncon++)
10246 {
10247 Elf_Internal_Dyn dyn;
10248 asection *s;
10249
10250 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10251
10252 switch (dyn.d_tag)
10253 {
10254 case DT_PLTGOT:
10255 if (htab->is_vxworks)
10256 s = htab->sgotplt;
10257 else
10258 s = htab->plt;
10259 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10260 break;
10261
10262 case DT_PLTRELSZ:
10263 dyn.d_un.d_val = htab->relplt->size;
10264 break;
10265
10266 case DT_JMPREL:
10267 s = htab->relplt;
10268 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10269 break;
10270
10271 case DT_PPC_GOT:
10272 dyn.d_un.d_ptr = got;
10273 break;
10274
10275 case DT_RELASZ:
10276 if (htab->is_vxworks)
10277 {
10278 if (htab->relplt)
10279 dyn.d_un.d_ptr -= htab->relplt->size;
10280 break;
10281 }
10282 continue;
10283
10284 default:
10285 if (htab->is_vxworks
10286 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10287 break;
10288 continue;
10289 }
10290
10291 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10292 }
10293 }
10294
10295 if (htab->got != NULL)
10296 {
10297 if (htab->elf.hgot->root.u.def.section == htab->got
10298 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10299 {
10300 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10301
10302 p += htab->elf.hgot->root.u.def.value;
10303 if (htab->plt_type == PLT_OLD)
10304 {
10305 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10306 so that a function can easily find the address of
10307 _GLOBAL_OFFSET_TABLE_. */
10308 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10309 < htab->elf.hgot->root.u.def.section->size);
10310 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10311 }
10312
10313 if (sdyn != NULL)
10314 {
10315 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10316 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10317 < htab->elf.hgot->root.u.def.section->size);
10318 bfd_put_32 (output_bfd, val, p);
10319 }
10320 }
10321 else
10322 {
10323 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10324 htab->elf.hgot->root.root.string,
10325 (htab->sgotplt != NULL
10326 ? htab->sgotplt->name : htab->got->name));
10327 bfd_set_error (bfd_error_bad_value);
10328 ret = FALSE;
10329 }
10330
10331 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10332 }
10333
10334 /* Fill in the first entry in the VxWorks procedure linkage table. */
10335 if (splt && splt->size > 0)
10336 {
10337 /* Use the right PLT. */
10338 const bfd_vma *plt_entry = (bfd_link_pic (info)
10339 ? ppc_elf_vxworks_pic_plt0_entry
10340 : ppc_elf_vxworks_plt0_entry);
10341
10342 if (!bfd_link_pic (info))
10343 {
10344 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10345
10346 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10347 splt->contents + 0);
10348 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10349 splt->contents + 4);
10350 }
10351 else
10352 {
10353 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10354 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10355 }
10356 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10357 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10358 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10359 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10360 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10361 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10362
10363 if (! bfd_link_pic (info))
10364 {
10365 Elf_Internal_Rela rela;
10366 bfd_byte *loc;
10367
10368 loc = htab->srelplt2->contents;
10369
10370 /* Output the @ha relocation for the first instruction. */
10371 rela.r_offset = (htab->plt->output_section->vma
10372 + htab->plt->output_offset
10373 + 2);
10374 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10375 rela.r_addend = 0;
10376 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10377 loc += sizeof (Elf32_External_Rela);
10378
10379 /* Output the @l relocation for the second instruction. */
10380 rela.r_offset = (htab->plt->output_section->vma
10381 + htab->plt->output_offset
10382 + 6);
10383 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10384 rela.r_addend = 0;
10385 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10386 loc += sizeof (Elf32_External_Rela);
10387
10388 /* Fix up the remaining relocations. They may have the wrong
10389 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10390 in which symbols were output. */
10391 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10392 {
10393 Elf_Internal_Rela rel;
10394
10395 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10396 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10397 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10398 loc += sizeof (Elf32_External_Rela);
10399
10400 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10401 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10402 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10403 loc += sizeof (Elf32_External_Rela);
10404
10405 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10406 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10407 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10408 loc += sizeof (Elf32_External_Rela);
10409 }
10410 }
10411 }
10412
10413 if (htab->glink != NULL
10414 && htab->glink->contents != NULL
10415 && htab->elf.dynamic_sections_created)
10416 {
10417 unsigned char *p;
10418 unsigned char *endp;
10419 bfd_vma res0;
10420 unsigned int i;
10421
10422 /*
10423 * PIC glink code is the following:
10424 *
10425 * # ith PLT code stub.
10426 * addis 11,30,(plt+(i-1)*4-got)@ha
10427 * lwz 11,(plt+(i-1)*4-got)@l(11)
10428 * mtctr 11
10429 * bctr
10430 *
10431 * # A table of branches, one for each plt entry.
10432 * # The idea is that the plt call stub loads ctr and r11 with these
10433 * # addresses, so (r11 - res_0) gives the plt index * 4.
10434 * res_0: b PLTresolve
10435 * res_1: b PLTresolve
10436 * .
10437 * # Some number of entries towards the end can be nops
10438 * res_n_m3: nop
10439 * res_n_m2: nop
10440 * res_n_m1:
10441 *
10442 * PLTresolve:
10443 * addis 11,11,(1f-res_0)@ha
10444 * mflr 0
10445 * bcl 20,31,1f
10446 * 1: addi 11,11,(1b-res_0)@l
10447 * mflr 12
10448 * mtlr 0
10449 * sub 11,11,12 # r11 = index * 4
10450 * addis 12,12,(got+4-1b)@ha
10451 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10452 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10453 * mtctr 0
10454 * add 0,11,11
10455 * add 11,0,11 # r11 = index * 12 = reloc offset.
10456 * bctr
10457 */
10458 static const unsigned int pic_plt_resolve[] =
10459 {
10460 ADDIS_11_11,
10461 MFLR_0,
10462 BCL_20_31,
10463 ADDI_11_11,
10464 MFLR_12,
10465 MTLR_0,
10466 SUB_11_11_12,
10467 ADDIS_12_12,
10468 LWZ_0_12,
10469 LWZ_12_12,
10470 MTCTR_0,
10471 ADD_0_11_11,
10472 ADD_11_0_11,
10473 BCTR,
10474 NOP,
10475 NOP
10476 };
10477
10478 /*
10479 * Non-PIC glink code is a little simpler.
10480 *
10481 * # ith PLT code stub.
10482 * lis 11,(plt+(i-1)*4)@ha
10483 * lwz 11,(plt+(i-1)*4)@l(11)
10484 * mtctr 11
10485 * bctr
10486 *
10487 * The branch table is the same, then comes
10488 *
10489 * PLTresolve:
10490 * lis 12,(got+4)@ha
10491 * addis 11,11,(-res_0)@ha
10492 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10493 * addi 11,11,(-res_0)@l # r11 = index * 4
10494 * mtctr 0
10495 * add 0,11,11
10496 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10497 * add 11,0,11 # r11 = index * 12 = reloc offset.
10498 * bctr
10499 */
10500 static const unsigned int plt_resolve[] =
10501 {
10502 LIS_12,
10503 ADDIS_11_11,
10504 LWZ_0_12,
10505 ADDI_11_11,
10506 MTCTR_0,
10507 ADD_0_11_11,
10508 LWZ_12_12,
10509 ADD_11_0_11,
10510 BCTR,
10511 NOP,
10512 NOP,
10513 NOP,
10514 NOP,
10515 NOP,
10516 NOP,
10517 NOP
10518 };
10519
10520 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10521 abort ();
10522 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10523 abort ();
10524
10525 /* Build the branch table, one for each plt entry (less one),
10526 and perhaps some padding. */
10527 p = htab->glink->contents;
10528 p += htab->glink_pltresolve;
10529 endp = htab->glink->contents;
10530 endp += htab->glink->size - GLINK_PLTRESOLVE;
10531 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10532 {
10533 bfd_put_32 (output_bfd, B + endp - p, p);
10534 p += 4;
10535 }
10536 while (p < endp)
10537 {
10538 bfd_put_32 (output_bfd, NOP, p);
10539 p += 4;
10540 }
10541
10542 res0 = (htab->glink_pltresolve
10543 + htab->glink->output_section->vma
10544 + htab->glink->output_offset);
10545
10546 if (htab->params->ppc476_workaround)
10547 {
10548 /* Ensure that a call stub at the end of a page doesn't
10549 result in prefetch over the end of the page into the
10550 glink branch table. */
10551 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10552 bfd_vma page_addr;
10553 bfd_vma glink_start = (htab->glink->output_section->vma
10554 + htab->glink->output_offset);
10555
10556 for (page_addr = res0 & -pagesize;
10557 page_addr > glink_start;
10558 page_addr -= pagesize)
10559 {
10560 /* We have a plt call stub that may need fixing. */
10561 bfd_byte *loc;
10562 unsigned int insn;
10563
10564 loc = htab->glink->contents + page_addr - 4 - glink_start;
10565 insn = bfd_get_32 (output_bfd, loc);
10566 if (insn == BCTR)
10567 {
10568 /* By alignment, we know that there must be at least
10569 one other call stub before this one. */
10570 insn = bfd_get_32 (output_bfd, loc - 16);
10571 if (insn == BCTR)
10572 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10573 else
10574 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10575 }
10576 }
10577 }
10578
10579 /* Last comes the PLTresolve stub. */
10580 if (bfd_link_pic (info))
10581 {
10582 bfd_vma bcl;
10583
10584 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10585 {
10586 unsigned int insn = pic_plt_resolve[i];
10587
10588 if (htab->params->ppc476_workaround && insn == NOP)
10589 insn = BA + 0;
10590 bfd_put_32 (output_bfd, insn, p);
10591 p += 4;
10592 }
10593 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10594
10595 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10596 + htab->glink->output_section->vma
10597 + htab->glink->output_offset);
10598
10599 bfd_put_32 (output_bfd,
10600 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10601 bfd_put_32 (output_bfd,
10602 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10603 bfd_put_32 (output_bfd,
10604 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10605 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10606 {
10607 bfd_put_32 (output_bfd,
10608 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10609 bfd_put_32 (output_bfd,
10610 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10611 }
10612 else
10613 {
10614 bfd_put_32 (output_bfd,
10615 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10616 bfd_put_32 (output_bfd,
10617 LWZ_12_12 + 4, p + 9*4);
10618 }
10619 }
10620 else
10621 {
10622 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10623 {
10624 unsigned int insn = plt_resolve[i];
10625
10626 if (htab->params->ppc476_workaround && insn == NOP)
10627 insn = BA + 0;
10628 bfd_put_32 (output_bfd, insn, p);
10629 p += 4;
10630 }
10631 p -= 4 * ARRAY_SIZE (plt_resolve);
10632
10633 bfd_put_32 (output_bfd,
10634 LIS_12 + PPC_HA (got + 4), p + 0*4);
10635 bfd_put_32 (output_bfd,
10636 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10637 bfd_put_32 (output_bfd,
10638 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10639 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10640 {
10641 bfd_put_32 (output_bfd,
10642 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10643 bfd_put_32 (output_bfd,
10644 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10645 }
10646 else
10647 {
10648 bfd_put_32 (output_bfd,
10649 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10650 bfd_put_32 (output_bfd,
10651 LWZ_12_12 + 4, p + 6*4);
10652 }
10653 }
10654 }
10655
10656 if (htab->glink_eh_frame != NULL
10657 && htab->glink_eh_frame->contents != NULL)
10658 {
10659 unsigned char *p = htab->glink_eh_frame->contents;
10660 bfd_vma val;
10661
10662 p += sizeof (glink_eh_frame_cie);
10663 /* FDE length. */
10664 p += 4;
10665 /* CIE pointer. */
10666 p += 4;
10667 /* Offset to .glink. */
10668 val = (htab->glink->output_section->vma
10669 + htab->glink->output_offset);
10670 val -= (htab->glink_eh_frame->output_section->vma
10671 + htab->glink_eh_frame->output_offset);
10672 val -= p - htab->glink_eh_frame->contents;
10673 bfd_put_32 (htab->elf.dynobj, val, p);
10674
10675 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10676 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10677 htab->glink_eh_frame,
10678 htab->glink_eh_frame->contents))
10679 return FALSE;
10680 }
10681
10682 return ret;
10683 }
10684 \f
10685 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10686 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10687 #define TARGET_BIG_SYM powerpc_elf32_vec
10688 #define TARGET_BIG_NAME "elf32-powerpc"
10689 #define ELF_ARCH bfd_arch_powerpc
10690 #define ELF_TARGET_ID PPC32_ELF_DATA
10691 #define ELF_MACHINE_CODE EM_PPC
10692 #ifdef __QNXTARGET__
10693 #define ELF_MAXPAGESIZE 0x1000
10694 #define ELF_COMMONPAGESIZE 0x1000
10695 #else
10696 #define ELF_MAXPAGESIZE 0x10000
10697 #define ELF_COMMONPAGESIZE 0x10000
10698 #endif
10699 #define ELF_MINPAGESIZE 0x1000
10700 #define elf_info_to_howto ppc_elf_info_to_howto
10701
10702 #ifdef EM_CYGNUS_POWERPC
10703 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10704 #endif
10705
10706 #ifdef EM_PPC_OLD
10707 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10708 #endif
10709
10710 #define elf_backend_plt_not_loaded 1
10711 #define elf_backend_can_gc_sections 1
10712 #define elf_backend_can_refcount 1
10713 #define elf_backend_rela_normal 1
10714 #define elf_backend_caches_rawsize 1
10715
10716 #define bfd_elf32_mkobject ppc_elf_mkobject
10717 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10718 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10719 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10720 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10721 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10722 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10723 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10724
10725 #define elf_backend_object_p ppc_elf_object_p
10726 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10727 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10728 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10729 #define elf_backend_relocate_section ppc_elf_relocate_section
10730 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10731 #define elf_backend_check_relocs ppc_elf_check_relocs
10732 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10733 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10734 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10735 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10736 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10737 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10738 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10739 #define elf_backend_fake_sections ppc_elf_fake_sections
10740 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10741 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10742 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10743 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10744 #define elf_backend_write_core_note ppc_elf_write_core_note
10745 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10746 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10747 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10748 #define elf_backend_write_section ppc_elf_write_section
10749 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10750 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10751 #define elf_backend_action_discarded ppc_elf_action_discarded
10752 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10753 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10754 #define elf_backend_section_processing ppc_elf_section_processing
10755
10756 #include "elf32-target.h"
10757
10758 /* FreeBSD Target */
10759
10760 #undef TARGET_LITTLE_SYM
10761 #undef TARGET_LITTLE_NAME
10762
10763 #undef TARGET_BIG_SYM
10764 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10765 #undef TARGET_BIG_NAME
10766 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10767
10768 #undef ELF_OSABI
10769 #define ELF_OSABI ELFOSABI_FREEBSD
10770
10771 #undef elf32_bed
10772 #define elf32_bed elf32_powerpc_fbsd_bed
10773
10774 #include "elf32-target.h"
10775
10776 /* VxWorks Target */
10777
10778 #undef TARGET_LITTLE_SYM
10779 #undef TARGET_LITTLE_NAME
10780
10781 #undef TARGET_BIG_SYM
10782 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10783 #undef TARGET_BIG_NAME
10784 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10785
10786 #undef ELF_OSABI
10787
10788 /* VxWorks uses the elf default section flags for .plt. */
10789 static const struct bfd_elf_special_section *
10790 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10791 {
10792 if (sec->name == NULL)
10793 return NULL;
10794
10795 if (strcmp (sec->name, ".plt") == 0)
10796 return _bfd_elf_get_sec_type_attr (abfd, sec);
10797
10798 return ppc_elf_get_sec_type_attr (abfd, sec);
10799 }
10800
10801 /* Like ppc_elf_link_hash_table_create, but overrides
10802 appropriately for VxWorks. */
10803 static struct bfd_link_hash_table *
10804 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10805 {
10806 struct bfd_link_hash_table *ret;
10807
10808 ret = ppc_elf_link_hash_table_create (abfd);
10809 if (ret)
10810 {
10811 struct ppc_elf_link_hash_table *htab
10812 = (struct ppc_elf_link_hash_table *)ret;
10813 htab->is_vxworks = 1;
10814 htab->plt_type = PLT_VXWORKS;
10815 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10816 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10817 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10818 }
10819 return ret;
10820 }
10821
10822 /* Tweak magic VxWorks symbols as they are loaded. */
10823 static bfd_boolean
10824 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10825 struct bfd_link_info *info,
10826 Elf_Internal_Sym *sym,
10827 const char **namep ATTRIBUTE_UNUSED,
10828 flagword *flagsp ATTRIBUTE_UNUSED,
10829 asection **secp,
10830 bfd_vma *valp)
10831 {
10832 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10833 valp))
10834 return FALSE;
10835
10836 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10837 }
10838
10839 static void
10840 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10841 {
10842 ppc_elf_final_write_processing(abfd, linker);
10843 elf_vxworks_final_write_processing(abfd, linker);
10844 }
10845
10846 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10847 define it. */
10848 #undef elf_backend_want_plt_sym
10849 #define elf_backend_want_plt_sym 1
10850 #undef elf_backend_want_got_plt
10851 #define elf_backend_want_got_plt 1
10852 #undef elf_backend_got_symbol_offset
10853 #define elf_backend_got_symbol_offset 0
10854 #undef elf_backend_plt_not_loaded
10855 #define elf_backend_plt_not_loaded 0
10856 #undef elf_backend_plt_readonly
10857 #define elf_backend_plt_readonly 1
10858 #undef elf_backend_got_header_size
10859 #define elf_backend_got_header_size 12
10860
10861 #undef bfd_elf32_get_synthetic_symtab
10862
10863 #undef bfd_elf32_bfd_link_hash_table_create
10864 #define bfd_elf32_bfd_link_hash_table_create \
10865 ppc_elf_vxworks_link_hash_table_create
10866 #undef elf_backend_add_symbol_hook
10867 #define elf_backend_add_symbol_hook \
10868 ppc_elf_vxworks_add_symbol_hook
10869 #undef elf_backend_link_output_symbol_hook
10870 #define elf_backend_link_output_symbol_hook \
10871 elf_vxworks_link_output_symbol_hook
10872 #undef elf_backend_final_write_processing
10873 #define elf_backend_final_write_processing \
10874 ppc_elf_vxworks_final_write_processing
10875 #undef elf_backend_get_sec_type_attr
10876 #define elf_backend_get_sec_type_attr \
10877 ppc_elf_vxworks_get_sec_type_attr
10878 #undef elf_backend_emit_relocs
10879 #define elf_backend_emit_relocs \
10880 elf_vxworks_emit_relocs
10881
10882 #undef elf32_bed
10883 #define elf32_bed ppc_elf_vxworks_bed
10884 #undef elf_backend_post_process_headers
10885
10886 #include "elf32-target.h"
GDB Binutils - Deliverables
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