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sim: m68hc11/mips/mn10300/v850: add basic sim_pc_get
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2015 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831 \f
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 unsigned int r_type;
2023
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 r_type = ELF32_R_TYPE (dst->r_info);
2029 if (r_type >= R_PPC_max)
2030 {
2031 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2032 abfd, r_type);
2033 bfd_set_error (bfd_error_bad_value);
2034 r_type = R_PPC_NONE;
2035 }
2036 cache_ptr->howto = ppc_elf_howto_table[r_type];
2037
2038 /* Just because the above assert didn't trigger doesn't mean that
2039 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2040 if (!cache_ptr->howto)
2041 {
2042 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2043 abfd, r_type);
2044 bfd_set_error (bfd_error_bad_value);
2045
2046 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2047 }
2048 }
2049
2050 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2051
2052 static bfd_reloc_status_type
2053 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2054 arelent *reloc_entry,
2055 asymbol *symbol,
2056 void *data ATTRIBUTE_UNUSED,
2057 asection *input_section,
2058 bfd *output_bfd,
2059 char **error_message ATTRIBUTE_UNUSED)
2060 {
2061 bfd_vma relocation;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 if (bfd_is_com_section (symbol->section))
2070 relocation = 0;
2071 else
2072 relocation = symbol->value;
2073
2074 relocation += symbol->section->output_section->vma;
2075 relocation += symbol->section->output_offset;
2076 relocation += reloc_entry->addend;
2077 if (reloc_entry->howto->pc_relative)
2078 relocation -= reloc_entry->address;
2079
2080 reloc_entry->addend += (relocation & 0x8000) << 1;
2081
2082 return bfd_reloc_continue;
2083 }
2084
2085 static bfd_reloc_status_type
2086 ppc_elf_unhandled_reloc (bfd *abfd,
2087 arelent *reloc_entry,
2088 asymbol *symbol,
2089 void *data,
2090 asection *input_section,
2091 bfd *output_bfd,
2092 char **error_message)
2093 {
2094 /* If this is a relocatable link (output_bfd test tells us), just
2095 call the generic function. Any adjustment will be done at final
2096 link time. */
2097 if (output_bfd != NULL)
2098 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2099 input_section, output_bfd, error_message);
2100
2101 if (error_message != NULL)
2102 {
2103 static char buf[60];
2104 sprintf (buf, _("generic linker can't handle %s"),
2105 reloc_entry->howto->name);
2106 *error_message = buf;
2107 }
2108 return bfd_reloc_dangerous;
2109 }
2110 \f
2111 /* Sections created by the linker. */
2112
2113 typedef struct elf_linker_section
2114 {
2115 /* Pointer to the bfd section. */
2116 asection *section;
2117 /* Section name. */
2118 const char *name;
2119 /* Associated bss section name. */
2120 const char *bss_name;
2121 /* Associated symbol name. */
2122 const char *sym_name;
2123 /* Associated symbol. */
2124 struct elf_link_hash_entry *sym;
2125 } elf_linker_section_t;
2126
2127 /* Linked list of allocated pointer entries. This hangs off of the
2128 symbol lists, and provides allows us to return different pointers,
2129 based on different addend's. */
2130
2131 typedef struct elf_linker_section_pointers
2132 {
2133 /* next allocated pointer for this symbol */
2134 struct elf_linker_section_pointers *next;
2135 /* offset of pointer from beginning of section */
2136 bfd_vma offset;
2137 /* addend used */
2138 bfd_vma addend;
2139 /* which linker section this is */
2140 elf_linker_section_t *lsect;
2141 } elf_linker_section_pointers_t;
2142
2143 struct ppc_elf_obj_tdata
2144 {
2145 struct elf_obj_tdata elf;
2146
2147 /* A mapping from local symbols to offsets into the various linker
2148 sections added. This is index by the symbol index. */
2149 elf_linker_section_pointers_t **linker_section_pointers;
2150
2151 /* Flags used to auto-detect plt type. */
2152 unsigned int makes_plt_call : 1;
2153 unsigned int has_rel16 : 1;
2154 };
2155
2156 #define ppc_elf_tdata(bfd) \
2157 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2158
2159 #define elf_local_ptr_offsets(bfd) \
2160 (ppc_elf_tdata (bfd)->linker_section_pointers)
2161
2162 #define is_ppc_elf(bfd) \
2163 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2164 && elf_object_id (bfd) == PPC32_ELF_DATA)
2165
2166 /* Override the generic function because we store some extras. */
2167
2168 static bfd_boolean
2169 ppc_elf_mkobject (bfd *abfd)
2170 {
2171 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2172 PPC32_ELF_DATA);
2173 }
2174
2175 /* Fix bad default arch selected for a 32 bit input bfd when the
2176 default is 64 bit. */
2177
2178 static bfd_boolean
2179 ppc_elf_object_p (bfd *abfd)
2180 {
2181 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2182 {
2183 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2184
2185 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2186 {
2187 /* Relies on arch after 64 bit default being 32 bit default. */
2188 abfd->arch_info = abfd->arch_info->next;
2189 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2190 }
2191 }
2192 return TRUE;
2193 }
2194
2195 /* Function to set whether a module needs the -mrelocatable bit set. */
2196
2197 static bfd_boolean
2198 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2199 {
2200 BFD_ASSERT (!elf_flags_init (abfd)
2201 || elf_elfheader (abfd)->e_flags == flags);
2202
2203 elf_elfheader (abfd)->e_flags = flags;
2204 elf_flags_init (abfd) = TRUE;
2205 return TRUE;
2206 }
2207
2208 /* Support for core dump NOTE sections. */
2209
2210 static bfd_boolean
2211 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2212 {
2213 int offset;
2214 unsigned int size;
2215
2216 switch (note->descsz)
2217 {
2218 default:
2219 return FALSE;
2220
2221 case 268: /* Linux/PPC. */
2222 /* pr_cursig */
2223 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2224
2225 /* pr_pid */
2226 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2227
2228 /* pr_reg */
2229 offset = 72;
2230 size = 192;
2231
2232 break;
2233 }
2234
2235 /* Make a ".reg/999" section. */
2236 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2237 size, note->descpos + offset);
2238 }
2239
2240 static bfd_boolean
2241 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2242 {
2243 switch (note->descsz)
2244 {
2245 default:
2246 return FALSE;
2247
2248 case 128: /* Linux/PPC elf_prpsinfo. */
2249 elf_tdata (abfd)->core->pid
2250 = bfd_get_32 (abfd, note->descdata + 16);
2251 elf_tdata (abfd)->core->program
2252 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2253 elf_tdata (abfd)->core->command
2254 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2255 }
2256
2257 /* Note that for some reason, a spurious space is tacked
2258 onto the end of the args in some (at least one anyway)
2259 implementations, so strip it off if it exists. */
2260
2261 {
2262 char *command = elf_tdata (abfd)->core->command;
2263 int n = strlen (command);
2264
2265 if (0 < n && command[n - 1] == ' ')
2266 command[n - 1] = '\0';
2267 }
2268
2269 return TRUE;
2270 }
2271
2272 char *
2273 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2274 const struct elf_internal_linux_prpsinfo *prpsinfo)
2275 {
2276 struct elf_external_ppc_linux_prpsinfo32 data;
2277
2278 memset (&data, 0, sizeof (data));
2279 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2280
2281 return elfcore_write_note (abfd, buf, bufsiz,
2282 "CORE", NT_PRPSINFO, &data, sizeof (data));
2283 }
2284
2285 static char *
2286 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2287 {
2288 switch (note_type)
2289 {
2290 default:
2291 return NULL;
2292
2293 case NT_PRPSINFO:
2294 {
2295 char data[128];
2296 va_list ap;
2297
2298 va_start (ap, note_type);
2299 memset (data, 0, sizeof (data));
2300 strncpy (data + 32, va_arg (ap, const char *), 16);
2301 strncpy (data + 48, va_arg (ap, const char *), 80);
2302 va_end (ap);
2303 return elfcore_write_note (abfd, buf, bufsiz,
2304 "CORE", note_type, data, sizeof (data));
2305 }
2306
2307 case NT_PRSTATUS:
2308 {
2309 char data[268];
2310 va_list ap;
2311 long pid;
2312 int cursig;
2313 const void *greg;
2314
2315 va_start (ap, note_type);
2316 memset (data, 0, 72);
2317 pid = va_arg (ap, long);
2318 bfd_put_32 (abfd, pid, data + 24);
2319 cursig = va_arg (ap, int);
2320 bfd_put_16 (abfd, cursig, data + 12);
2321 greg = va_arg (ap, const void *);
2322 memcpy (data + 72, greg, 192);
2323 memset (data + 264, 0, 4);
2324 va_end (ap);
2325 return elfcore_write_note (abfd, buf, bufsiz,
2326 "CORE", note_type, data, sizeof (data));
2327 }
2328 }
2329 }
2330
2331 static flagword
2332 ppc_elf_lookup_section_flags (char *flag_name)
2333 {
2334
2335 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2336 return SHF_PPC_VLE;
2337
2338 return 0;
2339 }
2340
2341 /* Add the VLE flag if required. */
2342
2343 bfd_boolean
2344 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2345 {
2346 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2347 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2348 shdr->sh_flags |= SHF_PPC_VLE;
2349
2350 return TRUE;
2351 }
2352
2353 /* Return address for Ith PLT stub in section PLT, for relocation REL
2354 or (bfd_vma) -1 if it should not be included. */
2355
2356 static bfd_vma
2357 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2358 const asection *plt ATTRIBUTE_UNUSED,
2359 const arelent *rel)
2360 {
2361 return rel->address;
2362 }
2363
2364 /* Handle a PowerPC specific section when reading an object file. This
2365 is called when bfd_section_from_shdr finds a section with an unknown
2366 type. */
2367
2368 static bfd_boolean
2369 ppc_elf_section_from_shdr (bfd *abfd,
2370 Elf_Internal_Shdr *hdr,
2371 const char *name,
2372 int shindex)
2373 {
2374 asection *newsect;
2375 flagword flags;
2376
2377 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2378 return FALSE;
2379
2380 newsect = hdr->bfd_section;
2381 flags = bfd_get_section_flags (abfd, newsect);
2382 if (hdr->sh_flags & SHF_EXCLUDE)
2383 flags |= SEC_EXCLUDE;
2384
2385 if (hdr->sh_type == SHT_ORDERED)
2386 flags |= SEC_SORT_ENTRIES;
2387
2388 bfd_set_section_flags (abfd, newsect, flags);
2389 return TRUE;
2390 }
2391
2392 /* Set up any other section flags and such that may be necessary. */
2393
2394 static bfd_boolean
2395 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2396 Elf_Internal_Shdr *shdr,
2397 asection *asect)
2398 {
2399 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2400 shdr->sh_type = SHT_ORDERED;
2401
2402 return TRUE;
2403 }
2404
2405 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2406 need to bump up the number of section headers. */
2407
2408 static int
2409 ppc_elf_additional_program_headers (bfd *abfd,
2410 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2411 {
2412 asection *s;
2413 int ret = 0;
2414
2415 s = bfd_get_section_by_name (abfd, ".sbss2");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2420 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2421 ++ret;
2422
2423 return ret;
2424 }
2425
2426 /* Modify the segment map for VLE executables. */
2427
2428 bfd_boolean
2429 ppc_elf_modify_segment_map (bfd *abfd,
2430 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2431 {
2432 struct elf_segment_map *m, *n;
2433 bfd_size_type amt;
2434 unsigned int j, k;
2435 bfd_boolean sect0_vle, sectj_vle;
2436
2437 /* At this point in the link, output sections have already been sorted by
2438 LMA and assigned to segments. All that is left to do is to ensure
2439 there is no mixing of VLE & non-VLE sections in a text segment.
2440 If we find that case, we split the segment.
2441 We maintain the original output section order. */
2442
2443 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2444 {
2445 if (m->count == 0)
2446 continue;
2447
2448 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2449 for (j = 1; j < m->count; ++j)
2450 {
2451 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2452
2453 if (sectj_vle != sect0_vle)
2454 break;
2455 }
2456 if (j >= m->count)
2457 continue;
2458
2459 /* sections 0..j-1 stay in this (current) segment,
2460 the remainder are put in a new segment.
2461 The scan resumes with the new segment. */
2462
2463 /* Fix the new segment. */
2464 amt = sizeof (struct elf_segment_map);
2465 amt += (m->count - j - 1) * sizeof (asection *);
2466 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2467 if (n == NULL)
2468 return FALSE;
2469
2470 n->p_type = PT_LOAD;
2471 n->p_flags = PF_X | PF_R;
2472 if (sectj_vle)
2473 n->p_flags |= PF_PPC_VLE;
2474 n->count = m->count - j;
2475 for (k = 0; k < n->count; ++k)
2476 {
2477 n->sections[k] = m->sections[j+k];
2478 m->sections[j+k] = NULL;
2479 }
2480 n->next = m->next;
2481 m->next = n;
2482
2483 /* Fix the current segment */
2484 m->count = j;
2485 }
2486
2487 return TRUE;
2488 }
2489
2490 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2491 .PPC.EMB.sbss0 a normal section, and not a bss section so
2492 that the linker doesn't crater when trying to make more than
2493 2 sections. */
2494
2495 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2496 {
2497 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2498 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2499 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2500 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2501 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2502 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2503 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2504 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2505 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2506 { NULL, 0, 0, 0, 0 }
2507 };
2508
2509 /* This is what we want for new plt/got. */
2510 static struct bfd_elf_special_section ppc_alt_plt =
2511 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2512
2513 static const struct bfd_elf_special_section *
2514 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2515 {
2516 const struct bfd_elf_special_section *ssect;
2517
2518 /* See if this is one of the special sections. */
2519 if (sec->name == NULL)
2520 return NULL;
2521
2522 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2523 sec->use_rela_p);
2524 if (ssect != NULL)
2525 {
2526 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2527 ssect = &ppc_alt_plt;
2528 return ssect;
2529 }
2530
2531 return _bfd_elf_get_sec_type_attr (abfd, sec);
2532 }
2533 \f
2534 /* Very simple linked list structure for recording apuinfo values. */
2535 typedef struct apuinfo_list
2536 {
2537 struct apuinfo_list *next;
2538 unsigned long value;
2539 }
2540 apuinfo_list;
2541
2542 static apuinfo_list *head;
2543 static bfd_boolean apuinfo_set;
2544
2545 static void
2546 apuinfo_list_init (void)
2547 {
2548 head = NULL;
2549 apuinfo_set = FALSE;
2550 }
2551
2552 static void
2553 apuinfo_list_add (unsigned long value)
2554 {
2555 apuinfo_list *entry = head;
2556
2557 while (entry != NULL)
2558 {
2559 if (entry->value == value)
2560 return;
2561 entry = entry->next;
2562 }
2563
2564 entry = bfd_malloc (sizeof (* entry));
2565 if (entry == NULL)
2566 return;
2567
2568 entry->value = value;
2569 entry->next = head;
2570 head = entry;
2571 }
2572
2573 static unsigned
2574 apuinfo_list_length (void)
2575 {
2576 apuinfo_list *entry;
2577 unsigned long count;
2578
2579 for (entry = head, count = 0;
2580 entry;
2581 entry = entry->next)
2582 ++ count;
2583
2584 return count;
2585 }
2586
2587 static inline unsigned long
2588 apuinfo_list_element (unsigned long number)
2589 {
2590 apuinfo_list * entry;
2591
2592 for (entry = head;
2593 entry && number --;
2594 entry = entry->next)
2595 ;
2596
2597 return entry ? entry->value : 0;
2598 }
2599
2600 static void
2601 apuinfo_list_finish (void)
2602 {
2603 apuinfo_list *entry;
2604
2605 for (entry = head; entry;)
2606 {
2607 apuinfo_list *next = entry->next;
2608 free (entry);
2609 entry = next;
2610 }
2611
2612 head = NULL;
2613 }
2614
2615 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2616 #define APUINFO_LABEL "APUinfo"
2617
2618 /* Scan the input BFDs and create a linked list of
2619 the APUinfo values that will need to be emitted. */
2620
2621 static void
2622 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2623 {
2624 bfd *ibfd;
2625 asection *asec;
2626 char *buffer = NULL;
2627 bfd_size_type largest_input_size = 0;
2628 unsigned i;
2629 unsigned long length;
2630 const char *error_message = NULL;
2631
2632 if (link_info == NULL)
2633 return;
2634
2635 apuinfo_list_init ();
2636
2637 /* Read in the input sections contents. */
2638 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2639 {
2640 unsigned long datum;
2641
2642 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2643 if (asec == NULL)
2644 continue;
2645
2646 error_message = _("corrupt %s section in %B");
2647 length = asec->size;
2648 if (length < 20)
2649 goto fail;
2650
2651 apuinfo_set = TRUE;
2652 if (largest_input_size < asec->size)
2653 {
2654 if (buffer)
2655 free (buffer);
2656 largest_input_size = asec->size;
2657 buffer = bfd_malloc (largest_input_size);
2658 if (!buffer)
2659 return;
2660 }
2661
2662 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2663 || (bfd_bread (buffer, length, ibfd) != length))
2664 {
2665 error_message = _("unable to read in %s section from %B");
2666 goto fail;
2667 }
2668
2669 /* Verify the contents of the header. Note - we have to
2670 extract the values this way in order to allow for a
2671 host whose endian-ness is different from the target. */
2672 datum = bfd_get_32 (ibfd, buffer);
2673 if (datum != sizeof APUINFO_LABEL)
2674 goto fail;
2675
2676 datum = bfd_get_32 (ibfd, buffer + 8);
2677 if (datum != 0x2)
2678 goto fail;
2679
2680 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2681 goto fail;
2682
2683 /* Get the number of bytes used for apuinfo entries. */
2684 datum = bfd_get_32 (ibfd, buffer + 4);
2685 if (datum + 20 != length)
2686 goto fail;
2687
2688 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2689 for (i = 0; i < datum; i += 4)
2690 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2691 }
2692
2693 error_message = NULL;
2694
2695 if (apuinfo_set)
2696 {
2697 /* Compute the size of the output section. */
2698 unsigned num_entries = apuinfo_list_length ();
2699
2700 /* Set the output section size, if it exists. */
2701 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2702
2703 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2704 {
2705 ibfd = abfd;
2706 error_message = _("warning: unable to set size of %s section in %B");
2707 }
2708 }
2709
2710 fail:
2711 if (buffer)
2712 free (buffer);
2713
2714 if (error_message)
2715 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2716 }
2717
2718 /* Prevent the output section from accumulating the input sections'
2719 contents. We have already stored this in our linked list structure. */
2720
2721 static bfd_boolean
2722 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2723 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2724 asection *asec,
2725 bfd_byte *contents ATTRIBUTE_UNUSED)
2726 {
2727 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2728 }
2729
2730 /* Finally we can generate the output section. */
2731
2732 static void
2733 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2734 {
2735 bfd_byte *buffer;
2736 asection *asec;
2737 unsigned i;
2738 unsigned num_entries;
2739 bfd_size_type length;
2740
2741 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2742 if (asec == NULL)
2743 return;
2744
2745 if (!apuinfo_set)
2746 return;
2747
2748 length = asec->size;
2749 if (length < 20)
2750 return;
2751
2752 buffer = bfd_malloc (length);
2753 if (buffer == NULL)
2754 {
2755 (*_bfd_error_handler)
2756 (_("failed to allocate space for new APUinfo section."));
2757 return;
2758 }
2759
2760 /* Create the apuinfo header. */
2761 num_entries = apuinfo_list_length ();
2762 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2763 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2764 bfd_put_32 (abfd, 0x2, buffer + 8);
2765 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2766
2767 length = 20;
2768 for (i = 0; i < num_entries; i++)
2769 {
2770 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2771 length += 4;
2772 }
2773
2774 if (length != asec->size)
2775 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2776
2777 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2778 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2779
2780 free (buffer);
2781
2782 apuinfo_list_finish ();
2783 }
2784 \f
2785 static bfd_boolean
2786 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2787 {
2788 bfd_byte buf[GLINK_ENTRY_SIZE];
2789
2790 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2791 return FALSE;
2792
2793 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2794 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2795 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2796 && bfd_get_32 (abfd, buf + 12) == BCTR);
2797 }
2798
2799 static bfd_boolean
2800 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2801 {
2802 bfd_vma vma = *(bfd_vma *) ptr;
2803 return ((section->flags & SEC_ALLOC) != 0
2804 && section->vma <= vma
2805 && vma < section->vma + section->size);
2806 }
2807
2808 static long
2809 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2810 long dynsymcount, asymbol **dynsyms,
2811 asymbol **ret)
2812 {
2813 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2814 asection *plt, *relplt, *dynamic, *glink;
2815 bfd_vma glink_vma = 0;
2816 bfd_vma resolv_vma = 0;
2817 bfd_vma stub_vma;
2818 asymbol *s;
2819 arelent *p;
2820 long count, i;
2821 size_t size;
2822 char *names;
2823 bfd_byte buf[4];
2824
2825 *ret = NULL;
2826
2827 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2828 return 0;
2829
2830 if (dynsymcount <= 0)
2831 return 0;
2832
2833 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2834 if (relplt == NULL)
2835 return 0;
2836
2837 plt = bfd_get_section_by_name (abfd, ".plt");
2838 if (plt == NULL)
2839 return 0;
2840
2841 /* Call common code to handle old-style executable PLTs. */
2842 if (elf_section_flags (plt) & SHF_EXECINSTR)
2843 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2844 dynsymcount, dynsyms, ret);
2845
2846 /* If this object was prelinked, the prelinker stored the address
2847 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2848 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2849 if (dynamic != NULL)
2850 {
2851 bfd_byte *dynbuf, *extdyn, *extdynend;
2852 size_t extdynsize;
2853 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2854
2855 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2856 return -1;
2857
2858 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2859 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2860
2861 extdyn = dynbuf;
2862 extdynend = extdyn + dynamic->size;
2863 for (; extdyn < extdynend; extdyn += extdynsize)
2864 {
2865 Elf_Internal_Dyn dyn;
2866 (*swap_dyn_in) (abfd, extdyn, &dyn);
2867
2868 if (dyn.d_tag == DT_NULL)
2869 break;
2870
2871 if (dyn.d_tag == DT_PPC_GOT)
2872 {
2873 unsigned int g_o_t = dyn.d_un.d_val;
2874 asection *got = bfd_get_section_by_name (abfd, ".got");
2875 if (got != NULL
2876 && bfd_get_section_contents (abfd, got, buf,
2877 g_o_t - got->vma + 4, 4))
2878 glink_vma = bfd_get_32 (abfd, buf);
2879 break;
2880 }
2881 }
2882 free (dynbuf);
2883 }
2884
2885 /* Otherwise we read the first plt entry. */
2886 if (glink_vma == 0)
2887 {
2888 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2889 glink_vma = bfd_get_32 (abfd, buf);
2890 }
2891
2892 if (glink_vma == 0)
2893 return 0;
2894
2895 /* The .glink section usually does not survive the final
2896 link; search for the section (usually .text) where the
2897 glink stubs now reside. */
2898 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2899 if (glink == NULL)
2900 return 0;
2901
2902 /* Determine glink PLT resolver by reading the relative branch
2903 from the first glink stub. */
2904 if (bfd_get_section_contents (abfd, glink, buf,
2905 glink_vma - glink->vma, 4))
2906 {
2907 unsigned int insn = bfd_get_32 (abfd, buf);
2908
2909 /* The first glink stub may either branch to the resolver ... */
2910 insn ^= B;
2911 if ((insn & ~0x3fffffc) == 0)
2912 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2913
2914 /* ... or fall through a bunch of NOPs. */
2915 else if ((insn ^ B ^ NOP) == 0)
2916 for (i = 4;
2917 bfd_get_section_contents (abfd, glink, buf,
2918 glink_vma - glink->vma + i, 4);
2919 i += 4)
2920 if (bfd_get_32 (abfd, buf) != NOP)
2921 {
2922 resolv_vma = glink_vma + i;
2923 break;
2924 }
2925 }
2926
2927 count = relplt->size / sizeof (Elf32_External_Rela);
2928 /* If the stubs are those for -shared/-pie then we might have
2929 multiple stubs for each plt entry. If that is the case then
2930 there is no way to associate stubs with their plt entries short
2931 of figuring out the GOT pointer value used in the stub. */
2932 if (!is_nonpic_glink_stub (abfd, glink,
2933 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2934 return 0;
2935
2936 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2937 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2938 return -1;
2939
2940 size = count * sizeof (asymbol);
2941 p = relplt->relocation;
2942 for (i = 0; i < count; i++, p++)
2943 {
2944 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2945 if (p->addend != 0)
2946 size += sizeof ("+0x") - 1 + 8;
2947 }
2948
2949 size += sizeof (asymbol) + sizeof ("__glink");
2950
2951 if (resolv_vma)
2952 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2953
2954 s = *ret = bfd_malloc (size);
2955 if (s == NULL)
2956 return -1;
2957
2958 stub_vma = glink_vma;
2959 names = (char *) (s + count + 1 + (resolv_vma != 0));
2960 p = relplt->relocation + count - 1;
2961 for (i = 0; i < count; i++)
2962 {
2963 size_t len;
2964
2965 *s = **p->sym_ptr_ptr;
2966 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2967 we are defining a symbol, ensure one of them is set. */
2968 if ((s->flags & BSF_LOCAL) == 0)
2969 s->flags |= BSF_GLOBAL;
2970 s->flags |= BSF_SYNTHETIC;
2971 s->section = glink;
2972 stub_vma -= 16;
2973 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
2974 stub_vma -= 32;
2975 s->value = stub_vma - glink->vma;
2976 s->name = names;
2977 s->udata.p = NULL;
2978 len = strlen ((*p->sym_ptr_ptr)->name);
2979 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2980 names += len;
2981 if (p->addend != 0)
2982 {
2983 memcpy (names, "+0x", sizeof ("+0x") - 1);
2984 names += sizeof ("+0x") - 1;
2985 bfd_sprintf_vma (abfd, names, p->addend);
2986 names += strlen (names);
2987 }
2988 memcpy (names, "@plt", sizeof ("@plt"));
2989 names += sizeof ("@plt");
2990 ++s;
2991 --p;
2992 }
2993
2994 /* Add a symbol at the start of the glink branch table. */
2995 memset (s, 0, sizeof *s);
2996 s->the_bfd = abfd;
2997 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2998 s->section = glink;
2999 s->value = glink_vma - glink->vma;
3000 s->name = names;
3001 memcpy (names, "__glink", sizeof ("__glink"));
3002 names += sizeof ("__glink");
3003 s++;
3004 count++;
3005
3006 if (resolv_vma)
3007 {
3008 /* Add a symbol for the glink PLT resolver. */
3009 memset (s, 0, sizeof *s);
3010 s->the_bfd = abfd;
3011 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3012 s->section = glink;
3013 s->value = resolv_vma - glink->vma;
3014 s->name = names;
3015 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3016 names += sizeof ("__glink_PLTresolve");
3017 s++;
3018 count++;
3019 }
3020
3021 return count;
3022 }
3023 \f
3024 /* The following functions are specific to the ELF linker, while
3025 functions above are used generally. They appear in this file more
3026 or less in the order in which they are called. eg.
3027 ppc_elf_check_relocs is called early in the link process,
3028 ppc_elf_finish_dynamic_sections is one of the last functions
3029 called. */
3030
3031 /* Track PLT entries needed for a given symbol. We might need more
3032 than one glink entry per symbol when generating a pic binary. */
3033 struct plt_entry
3034 {
3035 struct plt_entry *next;
3036
3037 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3038 This field stores the offset into .got2 used to initialise the
3039 GOT pointer reg. It will always be at least 32768. (Current
3040 gcc always uses an offset of 32768, but ld -r will pack .got2
3041 sections together resulting in larger offsets). */
3042 bfd_vma addend;
3043
3044 /* The .got2 section. */
3045 asection *sec;
3046
3047 /* PLT refcount or offset. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } plt;
3053
3054 /* .glink stub offset. */
3055 bfd_vma glink_offset;
3056 };
3057
3058 /* Of those relocs that might be copied as dynamic relocs, this function
3059 selects those that must be copied when linking a shared library,
3060 even when the symbol is local. */
3061
3062 static int
3063 must_be_dyn_reloc (struct bfd_link_info *info,
3064 enum elf_ppc_reloc_type r_type)
3065 {
3066 switch (r_type)
3067 {
3068 default:
3069 return 1;
3070
3071 case R_PPC_REL24:
3072 case R_PPC_REL14:
3073 case R_PPC_REL14_BRTAKEN:
3074 case R_PPC_REL14_BRNTAKEN:
3075 case R_PPC_REL32:
3076 return 0;
3077
3078 case R_PPC_TPREL32:
3079 case R_PPC_TPREL16:
3080 case R_PPC_TPREL16_LO:
3081 case R_PPC_TPREL16_HI:
3082 case R_PPC_TPREL16_HA:
3083 return !info->executable;
3084 }
3085 }
3086
3087 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3088 copying dynamic variables from a shared lib into an app's dynbss
3089 section, and instead use a dynamic relocation to point into the
3090 shared lib. */
3091 #define ELIMINATE_COPY_RELOCS 1
3092
3093 /* Used to track dynamic relocations for local symbols. */
3094 struct ppc_dyn_relocs
3095 {
3096 struct ppc_dyn_relocs *next;
3097
3098 /* The input section of the reloc. */
3099 asection *sec;
3100
3101 /* Total number of relocs copied for the input section. */
3102 unsigned int count : 31;
3103
3104 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3105 unsigned int ifunc : 1;
3106 };
3107
3108 /* PPC ELF linker hash entry. */
3109
3110 struct ppc_elf_link_hash_entry
3111 {
3112 struct elf_link_hash_entry elf;
3113
3114 /* If this symbol is used in the linker created sections, the processor
3115 specific backend uses this field to map the field into the offset
3116 from the beginning of the section. */
3117 elf_linker_section_pointers_t *linker_section_pointer;
3118
3119 /* Track dynamic relocs copied for this symbol. */
3120 struct elf_dyn_relocs *dyn_relocs;
3121
3122 /* Contexts in which symbol is used in the GOT (or TOC).
3123 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3124 corresponding relocs are encountered during check_relocs.
3125 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3126 indicate the corresponding GOT entry type is not needed. */
3127 #define TLS_GD 1 /* GD reloc. */
3128 #define TLS_LD 2 /* LD reloc. */
3129 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3130 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3131 #define TLS_TLS 16 /* Any TLS reloc. */
3132 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3133 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3134 char tls_mask;
3135
3136 /* Nonzero if we have seen a small data relocation referring to this
3137 symbol. */
3138 unsigned char has_sda_refs;
3139 };
3140
3141 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3142
3143 /* PPC ELF linker hash table. */
3144
3145 struct ppc_elf_link_hash_table
3146 {
3147 struct elf_link_hash_table elf;
3148
3149 /* Various options passed from the linker. */
3150 struct ppc_elf_params *params;
3151
3152 /* Short-cuts to get to dynamic linker sections. */
3153 asection *got;
3154 asection *relgot;
3155 asection *glink;
3156 asection *plt;
3157 asection *relplt;
3158 asection *iplt;
3159 asection *reliplt;
3160 asection *dynbss;
3161 asection *relbss;
3162 asection *dynsbss;
3163 asection *relsbss;
3164 elf_linker_section_t sdata[2];
3165 asection *sbss;
3166 asection *glink_eh_frame;
3167
3168 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3169 asection *srelplt2;
3170
3171 /* The .got.plt section (VxWorks only)*/
3172 asection *sgotplt;
3173
3174 /* Shortcut to __tls_get_addr. */
3175 struct elf_link_hash_entry *tls_get_addr;
3176
3177 /* The bfd that forced an old-style PLT. */
3178 bfd *old_bfd;
3179
3180 /* TLS local dynamic got entry handling. */
3181 union {
3182 bfd_signed_vma refcount;
3183 bfd_vma offset;
3184 } tlsld_got;
3185
3186 /* Offset of branch table to PltResolve function in glink. */
3187 bfd_vma glink_pltresolve;
3188
3189 /* Size of reserved GOT entries. */
3190 unsigned int got_header_size;
3191 /* Non-zero if allocating the header left a gap. */
3192 unsigned int got_gap;
3193
3194 /* The type of PLT we have chosen to use. */
3195 enum ppc_elf_plt_type plt_type;
3196
3197 /* True if the target system is VxWorks. */
3198 unsigned int is_vxworks:1;
3199
3200 /* The size of PLT entries. */
3201 int plt_entry_size;
3202 /* The distance between adjacent PLT slots. */
3203 int plt_slot_size;
3204 /* The size of the first PLT entry. */
3205 int plt_initial_entry_size;
3206
3207 /* Small local sym cache. */
3208 struct sym_cache sym_cache;
3209 };
3210
3211 /* Rename some of the generic section flags to better document how they
3212 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3213
3214 /* Nonzero if this section has TLS related relocations. */
3215 #define has_tls_reloc sec_flg0
3216
3217 /* Nonzero if this section has a call to __tls_get_addr. */
3218 #define has_tls_get_addr_call sec_flg1
3219
3220 /* Get the PPC ELF linker hash table from a link_info structure. */
3221
3222 #define ppc_elf_hash_table(p) \
3223 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3224 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3225
3226 /* Create an entry in a PPC ELF linker hash table. */
3227
3228 static struct bfd_hash_entry *
3229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3230 struct bfd_hash_table *table,
3231 const char *string)
3232 {
3233 /* Allocate the structure if it has not already been allocated by a
3234 subclass. */
3235 if (entry == NULL)
3236 {
3237 entry = bfd_hash_allocate (table,
3238 sizeof (struct ppc_elf_link_hash_entry));
3239 if (entry == NULL)
3240 return entry;
3241 }
3242
3243 /* Call the allocation method of the superclass. */
3244 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3245 if (entry != NULL)
3246 {
3247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3249 ppc_elf_hash_entry (entry)->tls_mask = 0;
3250 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3251 }
3252
3253 return entry;
3254 }
3255
3256 /* Create a PPC ELF linker hash table. */
3257
3258 static struct bfd_link_hash_table *
3259 ppc_elf_link_hash_table_create (bfd *abfd)
3260 {
3261 struct ppc_elf_link_hash_table *ret;
3262 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3263
3264 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3265 if (ret == NULL)
3266 return NULL;
3267
3268 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3269 ppc_elf_link_hash_newfunc,
3270 sizeof (struct ppc_elf_link_hash_entry),
3271 PPC32_ELF_DATA))
3272 {
3273 free (ret);
3274 return NULL;
3275 }
3276
3277 ret->elf.init_plt_refcount.refcount = 0;
3278 ret->elf.init_plt_refcount.glist = NULL;
3279 ret->elf.init_plt_offset.offset = 0;
3280 ret->elf.init_plt_offset.glist = NULL;
3281
3282 ret->params = &default_params;
3283
3284 ret->sdata[0].name = ".sdata";
3285 ret->sdata[0].sym_name = "_SDA_BASE_";
3286 ret->sdata[0].bss_name = ".sbss";
3287
3288 ret->sdata[1].name = ".sdata2";
3289 ret->sdata[1].sym_name = "_SDA2_BASE_";
3290 ret->sdata[1].bss_name = ".sbss2";
3291
3292 ret->plt_entry_size = 12;
3293 ret->plt_slot_size = 8;
3294 ret->plt_initial_entry_size = 72;
3295
3296 return &ret->elf.root;
3297 }
3298
3299 /* Hook linker params into hash table. */
3300
3301 void
3302 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3303 {
3304 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3305
3306 if (htab)
3307 htab->params = params;
3308 }
3309
3310 /* Create .got and the related sections. */
3311
3312 static bfd_boolean
3313 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3314 {
3315 struct ppc_elf_link_hash_table *htab;
3316 asection *s;
3317 flagword flags;
3318
3319 if (!_bfd_elf_create_got_section (abfd, info))
3320 return FALSE;
3321
3322 htab = ppc_elf_hash_table (info);
3323 htab->got = s = bfd_get_linker_section (abfd, ".got");
3324 if (s == NULL)
3325 abort ();
3326
3327 if (htab->is_vxworks)
3328 {
3329 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3330 if (!htab->sgotplt)
3331 abort ();
3332 }
3333 else
3334 {
3335 /* The powerpc .got has a blrl instruction in it. Mark it
3336 executable. */
3337 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3338 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3339 if (!bfd_set_section_flags (abfd, s, flags))
3340 return FALSE;
3341 }
3342
3343 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3344 if (!htab->relgot)
3345 abort ();
3346
3347 return TRUE;
3348 }
3349
3350 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3351 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3352 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3353
3354 static bfd_boolean
3355 ppc_elf_create_linker_section (bfd *abfd,
3356 struct bfd_link_info *info,
3357 flagword flags,
3358 elf_linker_section_t *lsect)
3359 {
3360 asection *s;
3361
3362 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3363 | SEC_LINKER_CREATED);
3364
3365 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3366 if (s == NULL)
3367 return FALSE;
3368 lsect->section = s;
3369
3370 /* Define the sym on the first section of this name. */
3371 s = bfd_get_section_by_name (abfd, lsect->name);
3372
3373 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3374 if (lsect->sym == NULL)
3375 return FALSE;
3376 lsect->sym->root.u.def.value = 0x8000;
3377 return TRUE;
3378 }
3379
3380 static bfd_boolean
3381 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3382 {
3383 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3384 asection *s;
3385 flagword flags;
3386
3387 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3388 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3389 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3390 htab->glink = s;
3391 if (s == NULL
3392 || !bfd_set_section_alignment (abfd, s,
3393 htab->params->ppc476_workaround ? 6 : 4))
3394 return FALSE;
3395
3396 if (!info->no_ld_generated_unwind_info)
3397 {
3398 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3399 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3400 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3401 htab->glink_eh_frame = s;
3402 if (s == NULL
3403 || !bfd_set_section_alignment (abfd, s, 2))
3404 return FALSE;
3405 }
3406
3407 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3408 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3409 htab->iplt = s;
3410 if (s == NULL
3411 || !bfd_set_section_alignment (abfd, s, 4))
3412 return FALSE;
3413
3414 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3415 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3416 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3417 htab->reliplt = s;
3418 if (s == NULL
3419 || ! bfd_set_section_alignment (abfd, s, 2))
3420 return FALSE;
3421
3422 if (!ppc_elf_create_linker_section (abfd, info, 0,
3423 &htab->sdata[0]))
3424 return FALSE;
3425
3426 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3427 &htab->sdata[1]))
3428 return FALSE;
3429
3430 return TRUE;
3431 }
3432
3433 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3434 to output sections (just like _bfd_elf_create_dynamic_sections has
3435 to create .dynbss and .rela.bss). */
3436
3437 static bfd_boolean
3438 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3439 {
3440 struct ppc_elf_link_hash_table *htab;
3441 asection *s;
3442 flagword flags;
3443
3444 htab = ppc_elf_hash_table (info);
3445
3446 if (htab->got == NULL
3447 && !ppc_elf_create_got (abfd, info))
3448 return FALSE;
3449
3450 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3451 return FALSE;
3452
3453 if (htab->glink == NULL
3454 && !ppc_elf_create_glink (abfd, info))
3455 return FALSE;
3456
3457 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3458 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3459 SEC_ALLOC | SEC_LINKER_CREATED);
3460 htab->dynsbss = s;
3461 if (s == NULL)
3462 return FALSE;
3463
3464 if (! info->shared)
3465 {
3466 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3467 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3468 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3469 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3470 htab->relsbss = s;
3471 if (s == NULL
3472 || ! bfd_set_section_alignment (abfd, s, 2))
3473 return FALSE;
3474 }
3475
3476 if (htab->is_vxworks
3477 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3478 return FALSE;
3479
3480 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3481 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3482 if (s == NULL)
3483 abort ();
3484
3485 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3486 if (htab->plt_type == PLT_VXWORKS)
3487 /* The VxWorks PLT is a loaded section with contents. */
3488 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3489 return bfd_set_section_flags (abfd, s, flags);
3490 }
3491
3492 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3493
3494 static void
3495 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3496 struct elf_link_hash_entry *dir,
3497 struct elf_link_hash_entry *ind)
3498 {
3499 struct ppc_elf_link_hash_entry *edir, *eind;
3500
3501 edir = (struct ppc_elf_link_hash_entry *) dir;
3502 eind = (struct ppc_elf_link_hash_entry *) ind;
3503
3504 edir->tls_mask |= eind->tls_mask;
3505 edir->has_sda_refs |= eind->has_sda_refs;
3506
3507 /* If called to transfer flags for a weakdef during processing
3508 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3509 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3510 if (!(ELIMINATE_COPY_RELOCS
3511 && eind->elf.root.type != bfd_link_hash_indirect
3512 && edir->elf.dynamic_adjusted))
3513 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3514
3515 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3516 edir->elf.ref_regular |= eind->elf.ref_regular;
3517 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3518 edir->elf.needs_plt |= eind->elf.needs_plt;
3519 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3520
3521 if (eind->dyn_relocs != NULL)
3522 {
3523 if (edir->dyn_relocs != NULL)
3524 {
3525 struct elf_dyn_relocs **pp;
3526 struct elf_dyn_relocs *p;
3527
3528 /* Add reloc counts against the indirect sym to the direct sym
3529 list. Merge any entries against the same section. */
3530 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3531 {
3532 struct elf_dyn_relocs *q;
3533
3534 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3535 if (q->sec == p->sec)
3536 {
3537 q->pc_count += p->pc_count;
3538 q->count += p->count;
3539 *pp = p->next;
3540 break;
3541 }
3542 if (q == NULL)
3543 pp = &p->next;
3544 }
3545 *pp = edir->dyn_relocs;
3546 }
3547
3548 edir->dyn_relocs = eind->dyn_relocs;
3549 eind->dyn_relocs = NULL;
3550 }
3551
3552 /* If we were called to copy over info for a weak sym, that's all.
3553 You might think dyn_relocs need not be copied over; After all,
3554 both syms will be dynamic or both non-dynamic so we're just
3555 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3556 code in ppc_elf_adjust_dynamic_symbol needs to check for
3557 dyn_relocs in read-only sections, and it does so on what is the
3558 DIR sym here. */
3559 if (eind->elf.root.type != bfd_link_hash_indirect)
3560 return;
3561
3562 /* Copy over the GOT refcount entries that we may have already seen to
3563 the symbol which just became indirect. */
3564 edir->elf.got.refcount += eind->elf.got.refcount;
3565 eind->elf.got.refcount = 0;
3566
3567 /* And plt entries. */
3568 if (eind->elf.plt.plist != NULL)
3569 {
3570 if (edir->elf.plt.plist != NULL)
3571 {
3572 struct plt_entry **entp;
3573 struct plt_entry *ent;
3574
3575 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3576 {
3577 struct plt_entry *dent;
3578
3579 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3580 if (dent->sec == ent->sec && dent->addend == ent->addend)
3581 {
3582 dent->plt.refcount += ent->plt.refcount;
3583 *entp = ent->next;
3584 break;
3585 }
3586 if (dent == NULL)
3587 entp = &ent->next;
3588 }
3589 *entp = edir->elf.plt.plist;
3590 }
3591
3592 edir->elf.plt.plist = eind->elf.plt.plist;
3593 eind->elf.plt.plist = NULL;
3594 }
3595
3596 if (eind->elf.dynindx != -1)
3597 {
3598 if (edir->elf.dynindx != -1)
3599 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3600 edir->elf.dynstr_index);
3601 edir->elf.dynindx = eind->elf.dynindx;
3602 edir->elf.dynstr_index = eind->elf.dynstr_index;
3603 eind->elf.dynindx = -1;
3604 eind->elf.dynstr_index = 0;
3605 }
3606 }
3607
3608 /* Hook called by the linker routine which adds symbols from an object
3609 file. We use it to put .comm items in .sbss, and not .bss. */
3610
3611 static bfd_boolean
3612 ppc_elf_add_symbol_hook (bfd *abfd,
3613 struct bfd_link_info *info,
3614 Elf_Internal_Sym *sym,
3615 const char **namep ATTRIBUTE_UNUSED,
3616 flagword *flagsp ATTRIBUTE_UNUSED,
3617 asection **secp,
3618 bfd_vma *valp)
3619 {
3620 if (sym->st_shndx == SHN_COMMON
3621 && !info->relocatable
3622 && is_ppc_elf (info->output_bfd)
3623 && sym->st_size <= elf_gp_size (abfd))
3624 {
3625 /* Common symbols less than or equal to -G nn bytes are automatically
3626 put into .sbss. */
3627 struct ppc_elf_link_hash_table *htab;
3628
3629 htab = ppc_elf_hash_table (info);
3630 if (htab->sbss == NULL)
3631 {
3632 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3633
3634 if (!htab->elf.dynobj)
3635 htab->elf.dynobj = abfd;
3636
3637 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3638 ".sbss",
3639 flags);
3640 if (htab->sbss == NULL)
3641 return FALSE;
3642 }
3643
3644 *secp = htab->sbss;
3645 *valp = sym->st_size;
3646 }
3647
3648 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3649 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
3650 && (abfd->flags & DYNAMIC) == 0
3651 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3652 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3653
3654 return TRUE;
3655 }
3656 \f
3657 /* Find a linker generated pointer with a given addend and type. */
3658
3659 static elf_linker_section_pointers_t *
3660 elf_find_pointer_linker_section
3661 (elf_linker_section_pointers_t *linker_pointers,
3662 bfd_vma addend,
3663 elf_linker_section_t *lsect)
3664 {
3665 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3666 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3667 return linker_pointers;
3668
3669 return NULL;
3670 }
3671
3672 /* Allocate a pointer to live in a linker created section. */
3673
3674 static bfd_boolean
3675 elf_allocate_pointer_linker_section (bfd *abfd,
3676 elf_linker_section_t *lsect,
3677 struct elf_link_hash_entry *h,
3678 const Elf_Internal_Rela *rel)
3679 {
3680 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3681 elf_linker_section_pointers_t *linker_section_ptr;
3682 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3683 bfd_size_type amt;
3684
3685 BFD_ASSERT (lsect != NULL);
3686
3687 /* Is this a global symbol? */
3688 if (h != NULL)
3689 {
3690 struct ppc_elf_link_hash_entry *eh;
3691
3692 /* Has this symbol already been allocated? If so, our work is done. */
3693 eh = (struct ppc_elf_link_hash_entry *) h;
3694 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3695 rel->r_addend,
3696 lsect))
3697 return TRUE;
3698
3699 ptr_linker_section_ptr = &eh->linker_section_pointer;
3700 }
3701 else
3702 {
3703 BFD_ASSERT (is_ppc_elf (abfd));
3704
3705 /* Allocation of a pointer to a local symbol. */
3706 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3707
3708 /* Allocate a table to hold the local symbols if first time. */
3709 if (!ptr)
3710 {
3711 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3712
3713 amt = num_symbols;
3714 amt *= sizeof (elf_linker_section_pointers_t *);
3715 ptr = bfd_zalloc (abfd, amt);
3716
3717 if (!ptr)
3718 return FALSE;
3719
3720 elf_local_ptr_offsets (abfd) = ptr;
3721 }
3722
3723 /* Has this symbol already been allocated? If so, our work is done. */
3724 if (elf_find_pointer_linker_section (ptr[r_symndx],
3725 rel->r_addend,
3726 lsect))
3727 return TRUE;
3728
3729 ptr_linker_section_ptr = &ptr[r_symndx];
3730 }
3731
3732 /* Allocate space for a pointer in the linker section, and allocate
3733 a new pointer record from internal memory. */
3734 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3735 amt = sizeof (elf_linker_section_pointers_t);
3736 linker_section_ptr = bfd_alloc (abfd, amt);
3737
3738 if (!linker_section_ptr)
3739 return FALSE;
3740
3741 linker_section_ptr->next = *ptr_linker_section_ptr;
3742 linker_section_ptr->addend = rel->r_addend;
3743 linker_section_ptr->lsect = lsect;
3744 *ptr_linker_section_ptr = linker_section_ptr;
3745
3746 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3747 return FALSE;
3748 linker_section_ptr->offset = lsect->section->size;
3749 lsect->section->size += 4;
3750
3751 #ifdef DEBUG
3752 fprintf (stderr,
3753 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3754 lsect->name, (long) linker_section_ptr->offset,
3755 (long) lsect->section->size);
3756 #endif
3757
3758 return TRUE;
3759 }
3760
3761 static struct plt_entry **
3762 update_local_sym_info (bfd *abfd,
3763 Elf_Internal_Shdr *symtab_hdr,
3764 unsigned long r_symndx,
3765 int tls_type)
3766 {
3767 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3768 struct plt_entry **local_plt;
3769 char *local_got_tls_masks;
3770
3771 if (local_got_refcounts == NULL)
3772 {
3773 bfd_size_type size = symtab_hdr->sh_info;
3774
3775 size *= (sizeof (*local_got_refcounts)
3776 + sizeof (*local_plt)
3777 + sizeof (*local_got_tls_masks));
3778 local_got_refcounts = bfd_zalloc (abfd, size);
3779 if (local_got_refcounts == NULL)
3780 return NULL;
3781 elf_local_got_refcounts (abfd) = local_got_refcounts;
3782 }
3783
3784 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3785 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3786 local_got_tls_masks[r_symndx] |= tls_type;
3787 if (tls_type != PLT_IFUNC)
3788 local_got_refcounts[r_symndx] += 1;
3789 return local_plt + r_symndx;
3790 }
3791
3792 static bfd_boolean
3793 update_plt_info (bfd *abfd, struct plt_entry **plist,
3794 asection *sec, bfd_vma addend)
3795 {
3796 struct plt_entry *ent;
3797
3798 if (addend < 32768)
3799 sec = NULL;
3800 for (ent = *plist; ent != NULL; ent = ent->next)
3801 if (ent->sec == sec && ent->addend == addend)
3802 break;
3803 if (ent == NULL)
3804 {
3805 bfd_size_type amt = sizeof (*ent);
3806 ent = bfd_alloc (abfd, amt);
3807 if (ent == NULL)
3808 return FALSE;
3809 ent->next = *plist;
3810 ent->sec = sec;
3811 ent->addend = addend;
3812 ent->plt.refcount = 0;
3813 *plist = ent;
3814 }
3815 ent->plt.refcount += 1;
3816 return TRUE;
3817 }
3818
3819 static struct plt_entry *
3820 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3821 {
3822 struct plt_entry *ent;
3823
3824 if (addend < 32768)
3825 sec = NULL;
3826 for (ent = *plist; ent != NULL; ent = ent->next)
3827 if (ent->sec == sec && ent->addend == addend)
3828 break;
3829 return ent;
3830 }
3831
3832 static bfd_boolean
3833 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3834 {
3835 return (r_type == R_PPC_PLTREL24
3836 || r_type == R_PPC_LOCAL24PC
3837 || r_type == R_PPC_REL24
3838 || r_type == R_PPC_REL14
3839 || r_type == R_PPC_REL14_BRTAKEN
3840 || r_type == R_PPC_REL14_BRNTAKEN
3841 || r_type == R_PPC_ADDR24
3842 || r_type == R_PPC_ADDR14
3843 || r_type == R_PPC_ADDR14_BRTAKEN
3844 || r_type == R_PPC_ADDR14_BRNTAKEN);
3845 }
3846
3847 static void
3848 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3849 {
3850 (*_bfd_error_handler)
3851 (_("%B: relocation %s cannot be used when making a shared object"),
3852 abfd,
3853 ppc_elf_howto_table[r_type]->name);
3854 bfd_set_error (bfd_error_bad_value);
3855 }
3856
3857 /* Look through the relocs for a section during the first phase, and
3858 allocate space in the global offset table or procedure linkage
3859 table. */
3860
3861 static bfd_boolean
3862 ppc_elf_check_relocs (bfd *abfd,
3863 struct bfd_link_info *info,
3864 asection *sec,
3865 const Elf_Internal_Rela *relocs)
3866 {
3867 struct ppc_elf_link_hash_table *htab;
3868 Elf_Internal_Shdr *symtab_hdr;
3869 struct elf_link_hash_entry **sym_hashes;
3870 const Elf_Internal_Rela *rel;
3871 const Elf_Internal_Rela *rel_end;
3872 asection *got2, *sreloc;
3873 struct elf_link_hash_entry *tga;
3874
3875 if (info->relocatable)
3876 return TRUE;
3877
3878 /* Don't do anything special with non-loaded, non-alloced sections.
3879 In particular, any relocs in such sections should not affect GOT
3880 and PLT reference counting (ie. we don't allow them to create GOT
3881 or PLT entries), there's no possibility or desire to optimize TLS
3882 relocs, and there's not much point in propagating relocs to shared
3883 libs that the dynamic linker won't relocate. */
3884 if ((sec->flags & SEC_ALLOC) == 0)
3885 return TRUE;
3886
3887 #ifdef DEBUG
3888 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3889 sec, abfd);
3890 #endif
3891
3892 BFD_ASSERT (is_ppc_elf (abfd));
3893
3894 /* Initialize howto table if not already done. */
3895 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3896 ppc_elf_howto_init ();
3897
3898 htab = ppc_elf_hash_table (info);
3899 if (htab->glink == NULL)
3900 {
3901 if (htab->elf.dynobj == NULL)
3902 htab->elf.dynobj = abfd;
3903 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3904 return FALSE;
3905 }
3906 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3907 FALSE, FALSE, TRUE);
3908 symtab_hdr = &elf_symtab_hdr (abfd);
3909 sym_hashes = elf_sym_hashes (abfd);
3910 got2 = bfd_get_section_by_name (abfd, ".got2");
3911 sreloc = NULL;
3912
3913 rel_end = relocs + sec->reloc_count;
3914 for (rel = relocs; rel < rel_end; rel++)
3915 {
3916 unsigned long r_symndx;
3917 enum elf_ppc_reloc_type r_type;
3918 struct elf_link_hash_entry *h;
3919 int tls_type;
3920
3921 r_symndx = ELF32_R_SYM (rel->r_info);
3922 if (r_symndx < symtab_hdr->sh_info)
3923 h = NULL;
3924 else
3925 {
3926 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3927 while (h->root.type == bfd_link_hash_indirect
3928 || h->root.type == bfd_link_hash_warning)
3929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3930
3931 /* PR15323, ref flags aren't set for references in the same
3932 object. */
3933 h->root.non_ir_ref = 1;
3934 }
3935
3936 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3937 This shows up in particular in an R_PPC_ADDR32 in the eabi
3938 startup code. */
3939 if (h != NULL
3940 && htab->got == NULL
3941 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3942 {
3943 if (htab->elf.dynobj == NULL)
3944 htab->elf.dynobj = abfd;
3945 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3946 return FALSE;
3947 BFD_ASSERT (h == htab->elf.hgot);
3948 }
3949
3950 tls_type = 0;
3951 r_type = ELF32_R_TYPE (rel->r_info);
3952 if (h == NULL && !htab->is_vxworks)
3953 {
3954 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3955 abfd, r_symndx);
3956 if (isym == NULL)
3957 return FALSE;
3958
3959 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3960 {
3961 struct plt_entry **ifunc;
3962
3963 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3964 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3965 PLT_IFUNC);
3966 if (ifunc == NULL)
3967 return FALSE;
3968
3969 /* STT_GNU_IFUNC symbols must have a PLT entry;
3970 In a non-pie executable even when there are
3971 no plt calls. */
3972 if (!info->shared
3973 || is_branch_reloc (r_type))
3974 {
3975 bfd_vma addend = 0;
3976 if (r_type == R_PPC_PLTREL24)
3977 {
3978 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3979 if (info->shared)
3980 addend = rel->r_addend;
3981 }
3982 if (!update_plt_info (abfd, ifunc, got2, addend))
3983 return FALSE;
3984 }
3985 }
3986 }
3987
3988 if (!htab->is_vxworks
3989 && is_branch_reloc (r_type)
3990 && h != NULL
3991 && h == tga)
3992 {
3993 if (rel != relocs
3994 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3995 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3996 /* We have a new-style __tls_get_addr call with a marker
3997 reloc. */
3998 ;
3999 else
4000 /* Mark this section as having an old-style call. */
4001 sec->has_tls_get_addr_call = 1;
4002 }
4003
4004 switch (r_type)
4005 {
4006 case R_PPC_TLSGD:
4007 case R_PPC_TLSLD:
4008 /* These special tls relocs tie a call to __tls_get_addr with
4009 its parameter symbol. */
4010 break;
4011
4012 case R_PPC_GOT_TLSLD16:
4013 case R_PPC_GOT_TLSLD16_LO:
4014 case R_PPC_GOT_TLSLD16_HI:
4015 case R_PPC_GOT_TLSLD16_HA:
4016 tls_type = TLS_TLS | TLS_LD;
4017 goto dogottls;
4018
4019 case R_PPC_GOT_TLSGD16:
4020 case R_PPC_GOT_TLSGD16_LO:
4021 case R_PPC_GOT_TLSGD16_HI:
4022 case R_PPC_GOT_TLSGD16_HA:
4023 tls_type = TLS_TLS | TLS_GD;
4024 goto dogottls;
4025
4026 case R_PPC_GOT_TPREL16:
4027 case R_PPC_GOT_TPREL16_LO:
4028 case R_PPC_GOT_TPREL16_HI:
4029 case R_PPC_GOT_TPREL16_HA:
4030 if (info->shared)
4031 info->flags |= DF_STATIC_TLS;
4032 tls_type = TLS_TLS | TLS_TPREL;
4033 goto dogottls;
4034
4035 case R_PPC_GOT_DTPREL16:
4036 case R_PPC_GOT_DTPREL16_LO:
4037 case R_PPC_GOT_DTPREL16_HI:
4038 case R_PPC_GOT_DTPREL16_HA:
4039 tls_type = TLS_TLS | TLS_DTPREL;
4040 dogottls:
4041 sec->has_tls_reloc = 1;
4042 /* Fall thru */
4043
4044 /* GOT16 relocations */
4045 case R_PPC_GOT16:
4046 case R_PPC_GOT16_LO:
4047 case R_PPC_GOT16_HI:
4048 case R_PPC_GOT16_HA:
4049 /* This symbol requires a global offset table entry. */
4050 if (htab->got == NULL)
4051 {
4052 if (htab->elf.dynobj == NULL)
4053 htab->elf.dynobj = abfd;
4054 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4055 return FALSE;
4056 }
4057 if (h != NULL)
4058 {
4059 h->got.refcount += 1;
4060 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4061 }
4062 else
4063 /* This is a global offset table entry for a local symbol. */
4064 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4065 return FALSE;
4066
4067 /* We may also need a plt entry if the symbol turns out to be
4068 an ifunc. */
4069 if (h != NULL && !info->shared)
4070 {
4071 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4072 return FALSE;
4073 }
4074 break;
4075
4076 /* Indirect .sdata relocation. */
4077 case R_PPC_EMB_SDAI16:
4078 if (info->shared)
4079 {
4080 bad_shared_reloc (abfd, r_type);
4081 return FALSE;
4082 }
4083 htab->sdata[0].sym->ref_regular = 1;
4084 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4085 h, rel))
4086 return FALSE;
4087 if (h != NULL)
4088 {
4089 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4090 h->non_got_ref = TRUE;
4091 }
4092 break;
4093
4094 /* Indirect .sdata2 relocation. */
4095 case R_PPC_EMB_SDA2I16:
4096 if (info->shared)
4097 {
4098 bad_shared_reloc (abfd, r_type);
4099 return FALSE;
4100 }
4101 htab->sdata[1].sym->ref_regular = 1;
4102 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4103 h, rel))
4104 return FALSE;
4105 if (h != NULL)
4106 {
4107 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4108 h->non_got_ref = TRUE;
4109 }
4110 break;
4111
4112 case R_PPC_SDAREL16:
4113 htab->sdata[0].sym->ref_regular = 1;
4114 /* Fall thru */
4115
4116 case R_PPC_VLE_SDAREL_LO16A:
4117 case R_PPC_VLE_SDAREL_LO16D:
4118 case R_PPC_VLE_SDAREL_HI16A:
4119 case R_PPC_VLE_SDAREL_HI16D:
4120 case R_PPC_VLE_SDAREL_HA16A:
4121 case R_PPC_VLE_SDAREL_HA16D:
4122 if (h != NULL)
4123 {
4124 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4125 h->non_got_ref = TRUE;
4126 }
4127 break;
4128
4129 case R_PPC_VLE_REL8:
4130 case R_PPC_VLE_REL15:
4131 case R_PPC_VLE_REL24:
4132 case R_PPC_VLE_LO16A:
4133 case R_PPC_VLE_LO16D:
4134 case R_PPC_VLE_HI16A:
4135 case R_PPC_VLE_HI16D:
4136 case R_PPC_VLE_HA16A:
4137 case R_PPC_VLE_HA16D:
4138 break;
4139
4140 case R_PPC_EMB_SDA2REL:
4141 if (info->shared)
4142 {
4143 bad_shared_reloc (abfd, r_type);
4144 return FALSE;
4145 }
4146 htab->sdata[1].sym->ref_regular = 1;
4147 if (h != NULL)
4148 {
4149 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4150 h->non_got_ref = TRUE;
4151 }
4152 break;
4153
4154 case R_PPC_VLE_SDA21_LO:
4155 case R_PPC_VLE_SDA21:
4156 case R_PPC_EMB_SDA21:
4157 case R_PPC_EMB_RELSDA:
4158 if (info->shared)
4159 {
4160 bad_shared_reloc (abfd, r_type);
4161 return FALSE;
4162 }
4163 if (h != NULL)
4164 {
4165 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4166 h->non_got_ref = TRUE;
4167 }
4168 break;
4169
4170 case R_PPC_EMB_NADDR32:
4171 case R_PPC_EMB_NADDR16:
4172 case R_PPC_EMB_NADDR16_LO:
4173 case R_PPC_EMB_NADDR16_HI:
4174 case R_PPC_EMB_NADDR16_HA:
4175 if (info->shared)
4176 {
4177 bad_shared_reloc (abfd, r_type);
4178 return FALSE;
4179 }
4180 if (h != NULL)
4181 h->non_got_ref = TRUE;
4182 break;
4183
4184 case R_PPC_PLTREL24:
4185 if (h == NULL)
4186 break;
4187 /* Fall through */
4188 case R_PPC_PLT32:
4189 case R_PPC_PLTREL32:
4190 case R_PPC_PLT16_LO:
4191 case R_PPC_PLT16_HI:
4192 case R_PPC_PLT16_HA:
4193 #ifdef DEBUG
4194 fprintf (stderr, "Reloc requires a PLT entry\n");
4195 #endif
4196 /* This symbol requires a procedure linkage table entry. We
4197 actually build the entry in finish_dynamic_symbol,
4198 because this might be a case of linking PIC code without
4199 linking in any dynamic objects, in which case we don't
4200 need to generate a procedure linkage table after all. */
4201
4202 if (h == NULL)
4203 {
4204 /* It does not make sense to have a procedure linkage
4205 table entry for a local symbol. */
4206 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4207 abfd, sec, rel->r_offset,
4208 ppc_elf_howto_table[r_type]->name);
4209 bfd_set_error (bfd_error_bad_value);
4210 return FALSE;
4211 }
4212 else
4213 {
4214 bfd_vma addend = 0;
4215
4216 if (r_type == R_PPC_PLTREL24)
4217 {
4218 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4219 if (info->shared)
4220 addend = rel->r_addend;
4221 }
4222 h->needs_plt = 1;
4223 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4224 return FALSE;
4225 }
4226 break;
4227
4228 /* The following relocations don't need to propagate the
4229 relocation if linking a shared object since they are
4230 section relative. */
4231 case R_PPC_SECTOFF:
4232 case R_PPC_SECTOFF_LO:
4233 case R_PPC_SECTOFF_HI:
4234 case R_PPC_SECTOFF_HA:
4235 case R_PPC_DTPREL16:
4236 case R_PPC_DTPREL16_LO:
4237 case R_PPC_DTPREL16_HI:
4238 case R_PPC_DTPREL16_HA:
4239 case R_PPC_TOC16:
4240 break;
4241
4242 case R_PPC_REL16:
4243 case R_PPC_REL16_LO:
4244 case R_PPC_REL16_HI:
4245 case R_PPC_REL16_HA:
4246 ppc_elf_tdata (abfd)->has_rel16 = 1;
4247 break;
4248
4249 /* These are just markers. */
4250 case R_PPC_TLS:
4251 case R_PPC_EMB_MRKREF:
4252 case R_PPC_NONE:
4253 case R_PPC_max:
4254 case R_PPC_RELAX:
4255 case R_PPC_RELAX_PLT:
4256 case R_PPC_RELAX_PLTREL24:
4257 break;
4258
4259 /* These should only appear in dynamic objects. */
4260 case R_PPC_COPY:
4261 case R_PPC_GLOB_DAT:
4262 case R_PPC_JMP_SLOT:
4263 case R_PPC_RELATIVE:
4264 case R_PPC_IRELATIVE:
4265 break;
4266
4267 /* These aren't handled yet. We'll report an error later. */
4268 case R_PPC_ADDR30:
4269 case R_PPC_EMB_RELSEC16:
4270 case R_PPC_EMB_RELST_LO:
4271 case R_PPC_EMB_RELST_HI:
4272 case R_PPC_EMB_RELST_HA:
4273 case R_PPC_EMB_BIT_FLD:
4274 break;
4275
4276 /* This refers only to functions defined in the shared library. */
4277 case R_PPC_LOCAL24PC:
4278 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4279 {
4280 htab->plt_type = PLT_OLD;
4281 htab->old_bfd = abfd;
4282 }
4283 if (h != NULL && h->type == STT_GNU_IFUNC)
4284 {
4285 if (info->shared)
4286 {
4287 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4288 abfd, sec, rel->r_offset,
4289 h->root.root.string);
4290 bfd_set_error (bfd_error_bad_value);
4291 return FALSE;
4292 }
4293 h->needs_plt = 1;
4294 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4295 return FALSE;
4296 }
4297 break;
4298
4299 /* This relocation describes the C++ object vtable hierarchy.
4300 Reconstruct it for later use during GC. */
4301 case R_PPC_GNU_VTINHERIT:
4302 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4303 return FALSE;
4304 break;
4305
4306 /* This relocation describes which C++ vtable entries are actually
4307 used. Record for later use during GC. */
4308 case R_PPC_GNU_VTENTRY:
4309 BFD_ASSERT (h != NULL);
4310 if (h != NULL
4311 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4312 return FALSE;
4313 break;
4314
4315 /* We shouldn't really be seeing these. */
4316 case R_PPC_TPREL32:
4317 case R_PPC_TPREL16:
4318 case R_PPC_TPREL16_LO:
4319 case R_PPC_TPREL16_HI:
4320 case R_PPC_TPREL16_HA:
4321 if (info->shared)
4322 info->flags |= DF_STATIC_TLS;
4323 goto dodyn;
4324
4325 /* Nor these. */
4326 case R_PPC_DTPMOD32:
4327 case R_PPC_DTPREL32:
4328 goto dodyn;
4329
4330 case R_PPC_REL32:
4331 if (h == NULL
4332 && got2 != NULL
4333 && (sec->flags & SEC_CODE) != 0
4334 && info->shared
4335 && htab->plt_type == PLT_UNSET)
4336 {
4337 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4338 the start of a function, which assembles to a REL32
4339 reference to .got2. If we detect one of these, then
4340 force the old PLT layout because the linker cannot
4341 reliably deduce the GOT pointer value needed for
4342 PLT call stubs. */
4343 asection *s;
4344 Elf_Internal_Sym *isym;
4345
4346 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4347 abfd, r_symndx);
4348 if (isym == NULL)
4349 return FALSE;
4350
4351 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4352 if (s == got2)
4353 {
4354 htab->plt_type = PLT_OLD;
4355 htab->old_bfd = abfd;
4356 }
4357 }
4358 if (h == NULL || h == htab->elf.hgot)
4359 break;
4360 /* fall through */
4361
4362 case R_PPC_ADDR32:
4363 case R_PPC_ADDR16:
4364 case R_PPC_ADDR16_LO:
4365 case R_PPC_ADDR16_HI:
4366 case R_PPC_ADDR16_HA:
4367 case R_PPC_UADDR32:
4368 case R_PPC_UADDR16:
4369 if (h != NULL && !info->shared)
4370 {
4371 /* We may need a plt entry if the symbol turns out to be
4372 a function defined in a dynamic object. */
4373 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4374 return FALSE;
4375
4376 /* We may need a copy reloc too. */
4377 h->non_got_ref = 1;
4378 h->pointer_equality_needed = 1;
4379 }
4380 goto dodyn;
4381
4382 case R_PPC_REL24:
4383 case R_PPC_REL14:
4384 case R_PPC_REL14_BRTAKEN:
4385 case R_PPC_REL14_BRNTAKEN:
4386 if (h == NULL)
4387 break;
4388 if (h == htab->elf.hgot)
4389 {
4390 if (htab->plt_type == PLT_UNSET)
4391 {
4392 htab->plt_type = PLT_OLD;
4393 htab->old_bfd = abfd;
4394 }
4395 break;
4396 }
4397 /* fall through */
4398
4399 case R_PPC_ADDR24:
4400 case R_PPC_ADDR14:
4401 case R_PPC_ADDR14_BRTAKEN:
4402 case R_PPC_ADDR14_BRNTAKEN:
4403 if (h != NULL && !info->shared)
4404 {
4405 /* We may need a plt entry if the symbol turns out to be
4406 a function defined in a dynamic object. */
4407 h->needs_plt = 1;
4408 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4409 return FALSE;
4410 break;
4411 }
4412
4413 dodyn:
4414 /* If we are creating a shared library, and this is a reloc
4415 against a global symbol, or a non PC relative reloc
4416 against a local symbol, then we need to copy the reloc
4417 into the shared library. However, if we are linking with
4418 -Bsymbolic, we do not need to copy a reloc against a
4419 global symbol which is defined in an object we are
4420 including in the link (i.e., DEF_REGULAR is set). At
4421 this point we have not seen all the input files, so it is
4422 possible that DEF_REGULAR is not set now but will be set
4423 later (it is never cleared). In case of a weak definition,
4424 DEF_REGULAR may be cleared later by a strong definition in
4425 a shared library. We account for that possibility below by
4426 storing information in the dyn_relocs field of the hash
4427 table entry. A similar situation occurs when creating
4428 shared libraries and symbol visibility changes render the
4429 symbol local.
4430
4431 If on the other hand, we are creating an executable, we
4432 may need to keep relocations for symbols satisfied by a
4433 dynamic library if we manage to avoid copy relocs for the
4434 symbol. */
4435 if ((info->shared
4436 && (must_be_dyn_reloc (info, r_type)
4437 || (h != NULL
4438 && (!SYMBOLIC_BIND (info, h)
4439 || h->root.type == bfd_link_hash_defweak
4440 || !h->def_regular))))
4441 || (ELIMINATE_COPY_RELOCS
4442 && !info->shared
4443 && h != NULL
4444 && (h->root.type == bfd_link_hash_defweak
4445 || !h->def_regular)))
4446 {
4447 #ifdef DEBUG
4448 fprintf (stderr,
4449 "ppc_elf_check_relocs needs to "
4450 "create relocation for %s\n",
4451 (h && h->root.root.string
4452 ? h->root.root.string : "<unknown>"));
4453 #endif
4454 if (sreloc == NULL)
4455 {
4456 if (htab->elf.dynobj == NULL)
4457 htab->elf.dynobj = abfd;
4458
4459 sreloc = _bfd_elf_make_dynamic_reloc_section
4460 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4461
4462 if (sreloc == NULL)
4463 return FALSE;
4464 }
4465
4466 /* If this is a global symbol, we count the number of
4467 relocations we need for this symbol. */
4468 if (h != NULL)
4469 {
4470 struct elf_dyn_relocs *p;
4471 struct elf_dyn_relocs **rel_head;
4472
4473 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4474 p = *rel_head;
4475 if (p == NULL || p->sec != sec)
4476 {
4477 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4478 if (p == NULL)
4479 return FALSE;
4480 p->next = *rel_head;
4481 *rel_head = p;
4482 p->sec = sec;
4483 p->count = 0;
4484 p->pc_count = 0;
4485 }
4486 p->count += 1;
4487 if (!must_be_dyn_reloc (info, r_type))
4488 p->pc_count += 1;
4489 }
4490 else
4491 {
4492 /* Track dynamic relocs needed for local syms too.
4493 We really need local syms available to do this
4494 easily. Oh well. */
4495 struct ppc_dyn_relocs *p;
4496 struct ppc_dyn_relocs **rel_head;
4497 bfd_boolean is_ifunc;
4498 asection *s;
4499 void *vpp;
4500 Elf_Internal_Sym *isym;
4501
4502 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4503 abfd, r_symndx);
4504 if (isym == NULL)
4505 return FALSE;
4506
4507 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4508 if (s == NULL)
4509 s = sec;
4510
4511 vpp = &elf_section_data (s)->local_dynrel;
4512 rel_head = (struct ppc_dyn_relocs **) vpp;
4513 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4514 p = *rel_head;
4515 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4516 p = p->next;
4517 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4518 {
4519 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4520 if (p == NULL)
4521 return FALSE;
4522 p->next = *rel_head;
4523 *rel_head = p;
4524 p->sec = sec;
4525 p->ifunc = is_ifunc;
4526 p->count = 0;
4527 }
4528 p->count += 1;
4529 }
4530 }
4531
4532 break;
4533 }
4534 }
4535
4536 return TRUE;
4537 }
4538 \f
4539
4540 /* Merge object attributes from IBFD into OBFD. Raise an error if
4541 there are conflicting attributes. */
4542 static bfd_boolean
4543 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4544 {
4545 obj_attribute *in_attr, *in_attrs;
4546 obj_attribute *out_attr, *out_attrs;
4547
4548 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4549 {
4550 /* This is the first object. Copy the attributes. */
4551 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4552
4553 /* Use the Tag_null value to indicate the attributes have been
4554 initialized. */
4555 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4556
4557 return TRUE;
4558 }
4559
4560 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4561 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4562
4563 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4564 non-conflicting ones. */
4565 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4566 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4567 if (in_attr->i != out_attr->i)
4568 {
4569 out_attr->type = 1;
4570 if (out_attr->i == 0)
4571 out_attr->i = in_attr->i;
4572 else if (in_attr->i == 0)
4573 ;
4574 else if (out_attr->i == 1 && in_attr->i == 2)
4575 _bfd_error_handler
4576 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4577 else if (out_attr->i == 1 && in_attr->i == 3)
4578 _bfd_error_handler
4579 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4580 obfd, ibfd);
4581 else if (out_attr->i == 3 && in_attr->i == 1)
4582 _bfd_error_handler
4583 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4584 ibfd, obfd);
4585 else if (out_attr->i == 3 && in_attr->i == 2)
4586 _bfd_error_handler
4587 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4588 ibfd, obfd);
4589 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4590 _bfd_error_handler
4591 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4592 else if (in_attr->i > 3)
4593 _bfd_error_handler
4594 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4595 in_attr->i);
4596 else
4597 _bfd_error_handler
4598 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4599 out_attr->i);
4600 }
4601
4602 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4603 merge non-conflicting ones. */
4604 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4605 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4606 if (in_attr->i != out_attr->i)
4607 {
4608 const char *in_abi = NULL, *out_abi = NULL;
4609
4610 switch (in_attr->i)
4611 {
4612 case 1: in_abi = "generic"; break;
4613 case 2: in_abi = "AltiVec"; break;
4614 case 3: in_abi = "SPE"; break;
4615 }
4616
4617 switch (out_attr->i)
4618 {
4619 case 1: out_abi = "generic"; break;
4620 case 2: out_abi = "AltiVec"; break;
4621 case 3: out_abi = "SPE"; break;
4622 }
4623
4624 out_attr->type = 1;
4625 if (out_attr->i == 0)
4626 out_attr->i = in_attr->i;
4627 else if (in_attr->i == 0)
4628 ;
4629 /* For now, allow generic to transition to AltiVec or SPE
4630 without a warning. If GCC marked files with their stack
4631 alignment and used don't-care markings for files which are
4632 not affected by the vector ABI, we could warn about this
4633 case too. */
4634 else if (out_attr->i == 1)
4635 out_attr->i = in_attr->i;
4636 else if (in_attr->i == 1)
4637 ;
4638 else if (in_abi == NULL)
4639 _bfd_error_handler
4640 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4641 in_attr->i);
4642 else if (out_abi == NULL)
4643 _bfd_error_handler
4644 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4645 in_attr->i);
4646 else
4647 _bfd_error_handler
4648 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4649 ibfd, obfd, in_abi, out_abi);
4650 }
4651
4652 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4653 and merge non-conflicting ones. */
4654 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4655 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4656 if (in_attr->i != out_attr->i)
4657 {
4658 out_attr->type = 1;
4659 if (out_attr->i == 0)
4660 out_attr->i = in_attr->i;
4661 else if (in_attr->i == 0)
4662 ;
4663 else if (out_attr->i == 1 && in_attr->i == 2)
4664 _bfd_error_handler
4665 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4666 else if (out_attr->i == 2 && in_attr->i == 1)
4667 _bfd_error_handler
4668 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4669 else if (in_attr->i > 2)
4670 _bfd_error_handler
4671 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4672 in_attr->i);
4673 else
4674 _bfd_error_handler
4675 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4676 out_attr->i);
4677 }
4678
4679 /* Merge Tag_compatibility attributes and any common GNU ones. */
4680 _bfd_elf_merge_object_attributes (ibfd, obfd);
4681
4682 return TRUE;
4683 }
4684
4685 /* Merge backend specific data from an object file to the output
4686 object file when linking. */
4687
4688 static bfd_boolean
4689 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4690 {
4691 flagword old_flags;
4692 flagword new_flags;
4693 bfd_boolean error;
4694
4695 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4696 return TRUE;
4697
4698 /* Check if we have the same endianness. */
4699 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4700 return FALSE;
4701
4702 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4703 return FALSE;
4704
4705 new_flags = elf_elfheader (ibfd)->e_flags;
4706 old_flags = elf_elfheader (obfd)->e_flags;
4707 if (!elf_flags_init (obfd))
4708 {
4709 /* First call, no flags set. */
4710 elf_flags_init (obfd) = TRUE;
4711 elf_elfheader (obfd)->e_flags = new_flags;
4712 }
4713
4714 /* Compatible flags are ok. */
4715 else if (new_flags == old_flags)
4716 ;
4717
4718 /* Incompatible flags. */
4719 else
4720 {
4721 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4722 to be linked with either. */
4723 error = FALSE;
4724 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4725 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4726 {
4727 error = TRUE;
4728 (*_bfd_error_handler)
4729 (_("%B: compiled with -mrelocatable and linked with "
4730 "modules compiled normally"), ibfd);
4731 }
4732 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4733 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4734 {
4735 error = TRUE;
4736 (*_bfd_error_handler)
4737 (_("%B: compiled normally and linked with "
4738 "modules compiled with -mrelocatable"), ibfd);
4739 }
4740
4741 /* The output is -mrelocatable-lib iff both the input files are. */
4742 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4743 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4744
4745 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4746 but each input file is either -mrelocatable or -mrelocatable-lib. */
4747 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4748 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4749 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4750 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4751
4752 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4753 any module uses it. */
4754 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4755
4756 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4757 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4758
4759 /* Warn about any other mismatches. */
4760 if (new_flags != old_flags)
4761 {
4762 error = TRUE;
4763 (*_bfd_error_handler)
4764 (_("%B: uses different e_flags (0x%lx) fields "
4765 "than previous modules (0x%lx)"),
4766 ibfd, (long) new_flags, (long) old_flags);
4767 }
4768
4769 if (error)
4770 {
4771 bfd_set_error (bfd_error_bad_value);
4772 return FALSE;
4773 }
4774 }
4775
4776 return TRUE;
4777 }
4778
4779 static void
4780 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4781 bfd_vma value,
4782 split16_format_type split16_format)
4783
4784 {
4785 unsigned int insn, top5;
4786
4787 insn = bfd_get_32 (output_bfd, loc);
4788 top5 = value & 0xf800;
4789 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4790 insn |= top5;
4791 insn |= value & 0x7ff;
4792 bfd_put_32 (output_bfd, insn, loc);
4793 }
4794
4795 \f
4796 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4797 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4798 int
4799 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4800 struct bfd_link_info *info)
4801 {
4802 struct ppc_elf_link_hash_table *htab;
4803 flagword flags;
4804
4805 htab = ppc_elf_hash_table (info);
4806
4807 if (htab->plt_type == PLT_UNSET)
4808 {
4809 struct elf_link_hash_entry *h;
4810
4811 if (htab->params->plt_style == PLT_OLD)
4812 htab->plt_type = PLT_OLD;
4813 else if (info->shared
4814 && htab->elf.dynamic_sections_created
4815 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4816 FALSE, FALSE, TRUE)) != NULL
4817 && (h->type == STT_FUNC
4818 || h->needs_plt)
4819 && h->ref_regular
4820 && !(SYMBOL_CALLS_LOCAL (info, h)
4821 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4822 && h->root.type == bfd_link_hash_undefweak)))
4823 {
4824 /* Profiling of shared libs (and pies) is not supported with
4825 secure plt, because ppc32 does profiling before a
4826 function prologue and a secure plt pic call stubs needs
4827 r30 to be set up. */
4828 htab->plt_type = PLT_OLD;
4829 }
4830 else
4831 {
4832 bfd *ibfd;
4833 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4834
4835 /* Look through the reloc flags left by ppc_elf_check_relocs.
4836 Use the old style bss plt if a file makes plt calls
4837 without using the new relocs, and if ld isn't given
4838 --secure-plt and we never see REL16 relocs. */
4839 if (plt_type == PLT_UNSET)
4840 plt_type = PLT_OLD;
4841 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4842 if (is_ppc_elf (ibfd))
4843 {
4844 if (ppc_elf_tdata (ibfd)->has_rel16)
4845 plt_type = PLT_NEW;
4846 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4847 {
4848 plt_type = PLT_OLD;
4849 htab->old_bfd = ibfd;
4850 break;
4851 }
4852 }
4853 htab->plt_type = plt_type;
4854 }
4855 }
4856 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4857 {
4858 if (htab->old_bfd != NULL)
4859 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4860 htab->old_bfd);
4861 else
4862 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4863 }
4864
4865 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4866
4867 if (htab->plt_type == PLT_NEW)
4868 {
4869 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4870 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4871
4872 /* The new PLT is a loaded section. */
4873 if (htab->plt != NULL
4874 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4875 return -1;
4876
4877 /* The new GOT is not executable. */
4878 if (htab->got != NULL
4879 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4880 return -1;
4881 }
4882 else
4883 {
4884 /* Stop an unused .glink section from affecting .text alignment. */
4885 if (htab->glink != NULL
4886 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4887 return -1;
4888 }
4889 return htab->plt_type == PLT_NEW;
4890 }
4891 \f
4892 /* Return the section that should be marked against GC for a given
4893 relocation. */
4894
4895 static asection *
4896 ppc_elf_gc_mark_hook (asection *sec,
4897 struct bfd_link_info *info,
4898 Elf_Internal_Rela *rel,
4899 struct elf_link_hash_entry *h,
4900 Elf_Internal_Sym *sym)
4901 {
4902 if (h != NULL)
4903 switch (ELF32_R_TYPE (rel->r_info))
4904 {
4905 case R_PPC_GNU_VTINHERIT:
4906 case R_PPC_GNU_VTENTRY:
4907 return NULL;
4908 }
4909
4910 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4911 }
4912
4913 /* Update the got, plt and dynamic reloc reference counts for the
4914 section being removed. */
4915
4916 static bfd_boolean
4917 ppc_elf_gc_sweep_hook (bfd *abfd,
4918 struct bfd_link_info *info,
4919 asection *sec,
4920 const Elf_Internal_Rela *relocs)
4921 {
4922 struct ppc_elf_link_hash_table *htab;
4923 Elf_Internal_Shdr *symtab_hdr;
4924 struct elf_link_hash_entry **sym_hashes;
4925 bfd_signed_vma *local_got_refcounts;
4926 const Elf_Internal_Rela *rel, *relend;
4927 asection *got2;
4928
4929 if (info->relocatable)
4930 return TRUE;
4931
4932 if ((sec->flags & SEC_ALLOC) == 0)
4933 return TRUE;
4934
4935 elf_section_data (sec)->local_dynrel = NULL;
4936
4937 htab = ppc_elf_hash_table (info);
4938 symtab_hdr = &elf_symtab_hdr (abfd);
4939 sym_hashes = elf_sym_hashes (abfd);
4940 local_got_refcounts = elf_local_got_refcounts (abfd);
4941 got2 = bfd_get_section_by_name (abfd, ".got2");
4942
4943 relend = relocs + sec->reloc_count;
4944 for (rel = relocs; rel < relend; rel++)
4945 {
4946 unsigned long r_symndx;
4947 enum elf_ppc_reloc_type r_type;
4948 struct elf_link_hash_entry *h = NULL;
4949
4950 r_symndx = ELF32_R_SYM (rel->r_info);
4951 if (r_symndx >= symtab_hdr->sh_info)
4952 {
4953 struct elf_dyn_relocs **pp, *p;
4954 struct ppc_elf_link_hash_entry *eh;
4955
4956 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4957 while (h->root.type == bfd_link_hash_indirect
4958 || h->root.type == bfd_link_hash_warning)
4959 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4960 eh = (struct ppc_elf_link_hash_entry *) h;
4961
4962 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4963 if (p->sec == sec)
4964 {
4965 /* Everything must go for SEC. */
4966 *pp = p->next;
4967 break;
4968 }
4969 }
4970
4971 r_type = ELF32_R_TYPE (rel->r_info);
4972 if (!htab->is_vxworks
4973 && h == NULL
4974 && local_got_refcounts != NULL
4975 && (!info->shared
4976 || is_branch_reloc (r_type)))
4977 {
4978 struct plt_entry **local_plt = (struct plt_entry **)
4979 (local_got_refcounts + symtab_hdr->sh_info);
4980 char *local_got_tls_masks = (char *)
4981 (local_plt + symtab_hdr->sh_info);
4982 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4983 {
4984 struct plt_entry **ifunc = local_plt + r_symndx;
4985 bfd_vma addend = 0;
4986 struct plt_entry *ent;
4987
4988 if (r_type == R_PPC_PLTREL24 && info->shared)
4989 addend = rel->r_addend;
4990 ent = find_plt_ent (ifunc, got2, addend);
4991 if (ent->plt.refcount > 0)
4992 ent->plt.refcount -= 1;
4993 continue;
4994 }
4995 }
4996
4997 switch (r_type)
4998 {
4999 case R_PPC_GOT_TLSLD16:
5000 case R_PPC_GOT_TLSLD16_LO:
5001 case R_PPC_GOT_TLSLD16_HI:
5002 case R_PPC_GOT_TLSLD16_HA:
5003 case R_PPC_GOT_TLSGD16:
5004 case R_PPC_GOT_TLSGD16_LO:
5005 case R_PPC_GOT_TLSGD16_HI:
5006 case R_PPC_GOT_TLSGD16_HA:
5007 case R_PPC_GOT_TPREL16:
5008 case R_PPC_GOT_TPREL16_LO:
5009 case R_PPC_GOT_TPREL16_HI:
5010 case R_PPC_GOT_TPREL16_HA:
5011 case R_PPC_GOT_DTPREL16:
5012 case R_PPC_GOT_DTPREL16_LO:
5013 case R_PPC_GOT_DTPREL16_HI:
5014 case R_PPC_GOT_DTPREL16_HA:
5015 case R_PPC_GOT16:
5016 case R_PPC_GOT16_LO:
5017 case R_PPC_GOT16_HI:
5018 case R_PPC_GOT16_HA:
5019 if (h != NULL)
5020 {
5021 if (h->got.refcount > 0)
5022 h->got.refcount--;
5023 if (!info->shared)
5024 {
5025 struct plt_entry *ent;
5026
5027 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5028 if (ent != NULL && ent->plt.refcount > 0)
5029 ent->plt.refcount -= 1;
5030 }
5031 }
5032 else if (local_got_refcounts != NULL)
5033 {
5034 if (local_got_refcounts[r_symndx] > 0)
5035 local_got_refcounts[r_symndx]--;
5036 }
5037 break;
5038
5039 case R_PPC_REL24:
5040 case R_PPC_REL14:
5041 case R_PPC_REL14_BRTAKEN:
5042 case R_PPC_REL14_BRNTAKEN:
5043 case R_PPC_REL32:
5044 if (h == NULL || h == htab->elf.hgot)
5045 break;
5046 /* Fall thru */
5047
5048 case R_PPC_ADDR32:
5049 case R_PPC_ADDR24:
5050 case R_PPC_ADDR16:
5051 case R_PPC_ADDR16_LO:
5052 case R_PPC_ADDR16_HI:
5053 case R_PPC_ADDR16_HA:
5054 case R_PPC_ADDR14:
5055 case R_PPC_ADDR14_BRTAKEN:
5056 case R_PPC_ADDR14_BRNTAKEN:
5057 case R_PPC_UADDR32:
5058 case R_PPC_UADDR16:
5059 if (info->shared)
5060 break;
5061
5062 case R_PPC_PLT32:
5063 case R_PPC_PLTREL24:
5064 case R_PPC_PLTREL32:
5065 case R_PPC_PLT16_LO:
5066 case R_PPC_PLT16_HI:
5067 case R_PPC_PLT16_HA:
5068 if (h != NULL)
5069 {
5070 bfd_vma addend = 0;
5071 struct plt_entry *ent;
5072
5073 if (r_type == R_PPC_PLTREL24 && info->shared)
5074 addend = rel->r_addend;
5075 ent = find_plt_ent (&h->plt.plist, got2, addend);
5076 if (ent != NULL && ent->plt.refcount > 0)
5077 ent->plt.refcount -= 1;
5078 }
5079 break;
5080
5081 default:
5082 break;
5083 }
5084 }
5085 return TRUE;
5086 }
5087 \f
5088 /* Set plt output section type, htab->tls_get_addr, and call the
5089 generic ELF tls_setup function. */
5090
5091 asection *
5092 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5093 {
5094 struct ppc_elf_link_hash_table *htab;
5095
5096 htab = ppc_elf_hash_table (info);
5097 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5098 FALSE, FALSE, TRUE);
5099 if (htab->plt_type != PLT_NEW)
5100 htab->params->no_tls_get_addr_opt = TRUE;
5101
5102 if (!htab->params->no_tls_get_addr_opt)
5103 {
5104 struct elf_link_hash_entry *opt, *tga;
5105 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5106 FALSE, FALSE, TRUE);
5107 if (opt != NULL
5108 && (opt->root.type == bfd_link_hash_defined
5109 || opt->root.type == bfd_link_hash_defweak))
5110 {
5111 /* If glibc supports an optimized __tls_get_addr call stub,
5112 signalled by the presence of __tls_get_addr_opt, and we'll
5113 be calling __tls_get_addr via a plt call stub, then
5114 make __tls_get_addr point to __tls_get_addr_opt. */
5115 tga = htab->tls_get_addr;
5116 if (htab->elf.dynamic_sections_created
5117 && tga != NULL
5118 && (tga->type == STT_FUNC
5119 || tga->needs_plt)
5120 && !(SYMBOL_CALLS_LOCAL (info, tga)
5121 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5122 && tga->root.type == bfd_link_hash_undefweak)))
5123 {
5124 struct plt_entry *ent;
5125 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5126 if (ent->plt.refcount > 0)
5127 break;
5128 if (ent != NULL)
5129 {
5130 tga->root.type = bfd_link_hash_indirect;
5131 tga->root.u.i.link = &opt->root;
5132 ppc_elf_copy_indirect_symbol (info, opt, tga);
5133 if (opt->dynindx != -1)
5134 {
5135 /* Use __tls_get_addr_opt in dynamic relocations. */
5136 opt->dynindx = -1;
5137 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5138 opt->dynstr_index);
5139 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5140 return FALSE;
5141 }
5142 htab->tls_get_addr = opt;
5143 }
5144 }
5145 }
5146 else
5147 htab->params->no_tls_get_addr_opt = TRUE;
5148 }
5149 if (htab->plt_type == PLT_NEW
5150 && htab->plt != NULL
5151 && htab->plt->output_section != NULL)
5152 {
5153 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5154 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5155 }
5156
5157 return _bfd_elf_tls_setup (obfd, info);
5158 }
5159
5160 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5161 HASH. */
5162
5163 static bfd_boolean
5164 branch_reloc_hash_match (const bfd *ibfd,
5165 const Elf_Internal_Rela *rel,
5166 const struct elf_link_hash_entry *hash)
5167 {
5168 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5169 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5170 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5171
5172 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5173 {
5174 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5175 struct elf_link_hash_entry *h;
5176
5177 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5178 while (h->root.type == bfd_link_hash_indirect
5179 || h->root.type == bfd_link_hash_warning)
5180 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5181 if (h == hash)
5182 return TRUE;
5183 }
5184 return FALSE;
5185 }
5186
5187 /* Run through all the TLS relocs looking for optimization
5188 opportunities. */
5189
5190 bfd_boolean
5191 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5192 struct bfd_link_info *info)
5193 {
5194 bfd *ibfd;
5195 asection *sec;
5196 struct ppc_elf_link_hash_table *htab;
5197 int pass;
5198
5199 if (info->relocatable || !info->executable)
5200 return TRUE;
5201
5202 htab = ppc_elf_hash_table (info);
5203 if (htab == NULL)
5204 return FALSE;
5205
5206 /* Make two passes through the relocs. First time check that tls
5207 relocs involved in setting up a tls_get_addr call are indeed
5208 followed by such a call. If they are not, don't do any tls
5209 optimization. On the second pass twiddle tls_mask flags to
5210 notify relocate_section that optimization can be done, and
5211 adjust got and plt refcounts. */
5212 for (pass = 0; pass < 2; ++pass)
5213 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5214 {
5215 Elf_Internal_Sym *locsyms = NULL;
5216 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5217 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5218
5219 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5220 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5221 {
5222 Elf_Internal_Rela *relstart, *rel, *relend;
5223 int expecting_tls_get_addr = 0;
5224
5225 /* Read the relocations. */
5226 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5227 info->keep_memory);
5228 if (relstart == NULL)
5229 return FALSE;
5230
5231 relend = relstart + sec->reloc_count;
5232 for (rel = relstart; rel < relend; rel++)
5233 {
5234 enum elf_ppc_reloc_type r_type;
5235 unsigned long r_symndx;
5236 struct elf_link_hash_entry *h = NULL;
5237 char *tls_mask;
5238 char tls_set, tls_clear;
5239 bfd_boolean is_local;
5240 bfd_signed_vma *got_count;
5241
5242 r_symndx = ELF32_R_SYM (rel->r_info);
5243 if (r_symndx >= symtab_hdr->sh_info)
5244 {
5245 struct elf_link_hash_entry **sym_hashes;
5246
5247 sym_hashes = elf_sym_hashes (ibfd);
5248 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5249 while (h->root.type == bfd_link_hash_indirect
5250 || h->root.type == bfd_link_hash_warning)
5251 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5252 }
5253
5254 is_local = FALSE;
5255 if (h == NULL
5256 || !h->def_dynamic)
5257 is_local = TRUE;
5258
5259 r_type = ELF32_R_TYPE (rel->r_info);
5260 /* If this section has old-style __tls_get_addr calls
5261 without marker relocs, then check that each
5262 __tls_get_addr call reloc is preceded by a reloc
5263 that conceivably belongs to the __tls_get_addr arg
5264 setup insn. If we don't find matching arg setup
5265 relocs, don't do any tls optimization. */
5266 if (pass == 0
5267 && sec->has_tls_get_addr_call
5268 && h != NULL
5269 && h == htab->tls_get_addr
5270 && !expecting_tls_get_addr
5271 && is_branch_reloc (r_type))
5272 {
5273 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5274 "TLS optimization disabled\n",
5275 ibfd, sec, rel->r_offset);
5276 if (elf_section_data (sec)->relocs != relstart)
5277 free (relstart);
5278 return TRUE;
5279 }
5280
5281 expecting_tls_get_addr = 0;
5282 switch (r_type)
5283 {
5284 case R_PPC_GOT_TLSLD16:
5285 case R_PPC_GOT_TLSLD16_LO:
5286 expecting_tls_get_addr = 1;
5287 /* Fall thru */
5288
5289 case R_PPC_GOT_TLSLD16_HI:
5290 case R_PPC_GOT_TLSLD16_HA:
5291 /* These relocs should never be against a symbol
5292 defined in a shared lib. Leave them alone if
5293 that turns out to be the case. */
5294 if (!is_local)
5295 continue;
5296
5297 /* LD -> LE */
5298 tls_set = 0;
5299 tls_clear = TLS_LD;
5300 break;
5301
5302 case R_PPC_GOT_TLSGD16:
5303 case R_PPC_GOT_TLSGD16_LO:
5304 expecting_tls_get_addr = 1;
5305 /* Fall thru */
5306
5307 case R_PPC_GOT_TLSGD16_HI:
5308 case R_PPC_GOT_TLSGD16_HA:
5309 if (is_local)
5310 /* GD -> LE */
5311 tls_set = 0;
5312 else
5313 /* GD -> IE */
5314 tls_set = TLS_TLS | TLS_TPRELGD;
5315 tls_clear = TLS_GD;
5316 break;
5317
5318 case R_PPC_GOT_TPREL16:
5319 case R_PPC_GOT_TPREL16_LO:
5320 case R_PPC_GOT_TPREL16_HI:
5321 case R_PPC_GOT_TPREL16_HA:
5322 if (is_local)
5323 {
5324 /* IE -> LE */
5325 tls_set = 0;
5326 tls_clear = TLS_TPREL;
5327 break;
5328 }
5329 else
5330 continue;
5331
5332 case R_PPC_TLSGD:
5333 case R_PPC_TLSLD:
5334 expecting_tls_get_addr = 2;
5335 tls_set = 0;
5336 tls_clear = 0;
5337 break;
5338
5339 default:
5340 continue;
5341 }
5342
5343 if (pass == 0)
5344 {
5345 if (!expecting_tls_get_addr
5346 || (expecting_tls_get_addr == 1
5347 && !sec->has_tls_get_addr_call))
5348 continue;
5349
5350 if (rel + 1 < relend
5351 && branch_reloc_hash_match (ibfd, rel + 1,
5352 htab->tls_get_addr))
5353 continue;
5354
5355 /* Uh oh, we didn't find the expected call. We
5356 could just mark this symbol to exclude it
5357 from tls optimization but it's safer to skip
5358 the entire optimization. */
5359 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5360 "TLS optimization disabled\n"),
5361 ibfd, sec, rel->r_offset);
5362 if (elf_section_data (sec)->relocs != relstart)
5363 free (relstart);
5364 return TRUE;
5365 }
5366
5367 if (expecting_tls_get_addr)
5368 {
5369 struct plt_entry *ent;
5370 bfd_vma addend = 0;
5371
5372 if (info->shared
5373 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5374 addend = rel[1].r_addend;
5375 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5376 got2, addend);
5377 if (ent != NULL && ent->plt.refcount > 0)
5378 ent->plt.refcount -= 1;
5379
5380 if (expecting_tls_get_addr == 2)
5381 continue;
5382 }
5383
5384 if (h != NULL)
5385 {
5386 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5387 got_count = &h->got.refcount;
5388 }
5389 else
5390 {
5391 bfd_signed_vma *lgot_refs;
5392 struct plt_entry **local_plt;
5393 char *lgot_masks;
5394
5395 if (locsyms == NULL)
5396 {
5397 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5398 if (locsyms == NULL)
5399 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5400 symtab_hdr->sh_info,
5401 0, NULL, NULL, NULL);
5402 if (locsyms == NULL)
5403 {
5404 if (elf_section_data (sec)->relocs != relstart)
5405 free (relstart);
5406 return FALSE;
5407 }
5408 }
5409 lgot_refs = elf_local_got_refcounts (ibfd);
5410 if (lgot_refs == NULL)
5411 abort ();
5412 local_plt = (struct plt_entry **)
5413 (lgot_refs + symtab_hdr->sh_info);
5414 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5415 tls_mask = &lgot_masks[r_symndx];
5416 got_count = &lgot_refs[r_symndx];
5417 }
5418
5419 if (tls_set == 0)
5420 {
5421 /* We managed to get rid of a got entry. */
5422 if (*got_count > 0)
5423 *got_count -= 1;
5424 }
5425
5426 *tls_mask |= tls_set;
5427 *tls_mask &= ~tls_clear;
5428 }
5429
5430 if (elf_section_data (sec)->relocs != relstart)
5431 free (relstart);
5432 }
5433
5434 if (locsyms != NULL
5435 && (symtab_hdr->contents != (unsigned char *) locsyms))
5436 {
5437 if (!info->keep_memory)
5438 free (locsyms);
5439 else
5440 symtab_hdr->contents = (unsigned char *) locsyms;
5441 }
5442 }
5443 return TRUE;
5444 }
5445 \f
5446 /* Return true if we have dynamic relocs that apply to read-only sections. */
5447
5448 static bfd_boolean
5449 readonly_dynrelocs (struct elf_link_hash_entry *h)
5450 {
5451 struct elf_dyn_relocs *p;
5452
5453 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5454 {
5455 asection *s = p->sec->output_section;
5456
5457 if (s != NULL
5458 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5459 == (SEC_READONLY | SEC_ALLOC)))
5460 return TRUE;
5461 }
5462 return FALSE;
5463 }
5464
5465 /* Adjust a symbol defined by a dynamic object and referenced by a
5466 regular object. The current definition is in some section of the
5467 dynamic object, but we're not including those sections. We have to
5468 change the definition to something the rest of the link can
5469 understand. */
5470
5471 static bfd_boolean
5472 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5473 struct elf_link_hash_entry *h)
5474 {
5475 struct ppc_elf_link_hash_table *htab;
5476 asection *s;
5477
5478 #ifdef DEBUG
5479 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5480 h->root.root.string);
5481 #endif
5482
5483 /* Make sure we know what is going on here. */
5484 htab = ppc_elf_hash_table (info);
5485 BFD_ASSERT (htab->elf.dynobj != NULL
5486 && (h->needs_plt
5487 || h->type == STT_GNU_IFUNC
5488 || h->u.weakdef != NULL
5489 || (h->def_dynamic
5490 && h->ref_regular
5491 && !h->def_regular)));
5492
5493 /* Deal with function syms. */
5494 if (h->type == STT_FUNC
5495 || h->type == STT_GNU_IFUNC
5496 || h->needs_plt)
5497 {
5498 /* Clear procedure linkage table information for any symbol that
5499 won't need a .plt entry. */
5500 struct plt_entry *ent;
5501 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5502 if (ent->plt.refcount > 0)
5503 break;
5504 if (ent == NULL
5505 || (h->type != STT_GNU_IFUNC
5506 && (SYMBOL_CALLS_LOCAL (info, h)
5507 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5508 && h->root.type == bfd_link_hash_undefweak))))
5509 {
5510 /* A PLT entry is not required/allowed when:
5511
5512 1. We are not using ld.so; because then the PLT entry
5513 can't be set up, so we can't use one. In this case,
5514 ppc_elf_adjust_dynamic_symbol won't even be called.
5515
5516 2. GC has rendered the entry unused.
5517
5518 3. We know for certain that a call to this symbol
5519 will go to this object, or will remain undefined. */
5520 h->plt.plist = NULL;
5521 h->needs_plt = 0;
5522 h->pointer_equality_needed = 0;
5523 }
5524 else
5525 {
5526 /* Taking a function's address in a read/write section
5527 doesn't require us to define the function symbol in the
5528 executable on a plt call stub. A dynamic reloc can
5529 be used instead. */
5530 if (h->pointer_equality_needed
5531 && h->type != STT_GNU_IFUNC
5532 && !htab->is_vxworks
5533 && !ppc_elf_hash_entry (h)->has_sda_refs
5534 && !readonly_dynrelocs (h))
5535 {
5536 h->pointer_equality_needed = 0;
5537 h->non_got_ref = 0;
5538 }
5539
5540 /* After adjust_dynamic_symbol, non_got_ref set in the
5541 non-shared case means that we have allocated space in
5542 .dynbss for the symbol and thus dyn_relocs for this
5543 symbol should be discarded.
5544 If we get here we know we are making a PLT entry for this
5545 symbol, and in an executable we'd normally resolve
5546 relocations against this symbol to the PLT entry. Allow
5547 dynamic relocs if the reference is weak, and the dynamic
5548 relocs will not cause text relocation. */
5549 else if (!h->ref_regular_nonweak
5550 && h->non_got_ref
5551 && h->type != STT_GNU_IFUNC
5552 && !htab->is_vxworks
5553 && !ppc_elf_hash_entry (h)->has_sda_refs
5554 && !readonly_dynrelocs (h))
5555 h->non_got_ref = 0;
5556 }
5557 return TRUE;
5558 }
5559 else
5560 h->plt.plist = NULL;
5561
5562 /* If this is a weak symbol, and there is a real definition, the
5563 processor independent code will have arranged for us to see the
5564 real definition first, and we can just use the same value. */
5565 if (h->u.weakdef != NULL)
5566 {
5567 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5568 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5569 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5570 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5571 if (ELIMINATE_COPY_RELOCS)
5572 h->non_got_ref = h->u.weakdef->non_got_ref;
5573 return TRUE;
5574 }
5575
5576 /* This is a reference to a symbol defined by a dynamic object which
5577 is not a function. */
5578
5579 /* If we are creating a shared library, we must presume that the
5580 only references to the symbol are via the global offset table.
5581 For such cases we need not do anything here; the relocations will
5582 be handled correctly by relocate_section. */
5583 if (info->shared)
5584 return TRUE;
5585
5586 /* If there are no references to this symbol that do not use the
5587 GOT, we don't need to generate a copy reloc. */
5588 if (!h->non_got_ref)
5589 return TRUE;
5590
5591 /* If -z nocopyreloc was given, we won't generate them either. */
5592 if (info->nocopyreloc)
5593 {
5594 h->non_got_ref = 0;
5595 return TRUE;
5596 }
5597
5598 /* If we didn't find any dynamic relocs in read-only sections, then
5599 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5600 We can't do this if there are any small data relocations. This
5601 doesn't work on VxWorks, where we can not have dynamic
5602 relocations (other than copy and jump slot relocations) in an
5603 executable. */
5604 if (ELIMINATE_COPY_RELOCS
5605 && !ppc_elf_hash_entry (h)->has_sda_refs
5606 && !htab->is_vxworks
5607 && !h->def_regular
5608 && !readonly_dynrelocs (h))
5609 {
5610 h->non_got_ref = 0;
5611 return TRUE;
5612 }
5613
5614 /* Protected variables do not work with .dynbss. The copy in
5615 .dynbss won't be used by the shared library with the protected
5616 definition for the variable. Text relocations are preferable
5617 to an incorrect program. */
5618 if (h->protected_def)
5619 {
5620 h->non_got_ref = 0;
5621 return TRUE;
5622 }
5623
5624 /* We must allocate the symbol in our .dynbss section, which will
5625 become part of the .bss section of the executable. There will be
5626 an entry for this symbol in the .dynsym section. The dynamic
5627 object will contain position independent code, so all references
5628 from the dynamic object to this symbol will go through the global
5629 offset table. The dynamic linker will use the .dynsym entry to
5630 determine the address it must put in the global offset table, so
5631 both the dynamic object and the regular object will refer to the
5632 same memory location for the variable.
5633
5634 Of course, if the symbol is referenced using SDAREL relocs, we
5635 must instead allocate it in .sbss. */
5636
5637 if (ppc_elf_hash_entry (h)->has_sda_refs)
5638 s = htab->dynsbss;
5639 else
5640 s = htab->dynbss;
5641 BFD_ASSERT (s != NULL);
5642
5643 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5644 copy the initial value out of the dynamic object and into the
5645 runtime process image. We need to remember the offset into the
5646 .rela.bss section we are going to use. */
5647 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5648 {
5649 asection *srel;
5650
5651 if (ppc_elf_hash_entry (h)->has_sda_refs)
5652 srel = htab->relsbss;
5653 else
5654 srel = htab->relbss;
5655 BFD_ASSERT (srel != NULL);
5656 srel->size += sizeof (Elf32_External_Rela);
5657 h->needs_copy = 1;
5658 }
5659
5660 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5661 }
5662 \f
5663 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5664 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5665 specifying the addend on the plt relocation. For -fpic code, the sym
5666 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5667 xxxxxxxx.got2.plt_pic32.<callee>. */
5668
5669 static bfd_boolean
5670 add_stub_sym (struct plt_entry *ent,
5671 struct elf_link_hash_entry *h,
5672 struct bfd_link_info *info)
5673 {
5674 struct elf_link_hash_entry *sh;
5675 size_t len1, len2, len3;
5676 char *name;
5677 const char *stub;
5678 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5679
5680 if (info->shared)
5681 stub = ".plt_pic32.";
5682 else
5683 stub = ".plt_call32.";
5684
5685 len1 = strlen (h->root.root.string);
5686 len2 = strlen (stub);
5687 len3 = 0;
5688 if (ent->sec)
5689 len3 = strlen (ent->sec->name);
5690 name = bfd_malloc (len1 + len2 + len3 + 9);
5691 if (name == NULL)
5692 return FALSE;
5693 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5694 if (ent->sec)
5695 memcpy (name + 8, ent->sec->name, len3);
5696 memcpy (name + 8 + len3, stub, len2);
5697 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5698 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5699 if (sh == NULL)
5700 return FALSE;
5701 if (sh->root.type == bfd_link_hash_new)
5702 {
5703 sh->root.type = bfd_link_hash_defined;
5704 sh->root.u.def.section = htab->glink;
5705 sh->root.u.def.value = ent->glink_offset;
5706 sh->ref_regular = 1;
5707 sh->def_regular = 1;
5708 sh->ref_regular_nonweak = 1;
5709 sh->forced_local = 1;
5710 sh->non_elf = 0;
5711 sh->root.linker_def = 1;
5712 }
5713 return TRUE;
5714 }
5715
5716 /* Allocate NEED contiguous space in .got, and return the offset.
5717 Handles allocation of the got header when crossing 32k. */
5718
5719 static bfd_vma
5720 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5721 {
5722 bfd_vma where;
5723 unsigned int max_before_header;
5724
5725 if (htab->plt_type == PLT_VXWORKS)
5726 {
5727 where = htab->got->size;
5728 htab->got->size += need;
5729 }
5730 else
5731 {
5732 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5733 if (need <= htab->got_gap)
5734 {
5735 where = max_before_header - htab->got_gap;
5736 htab->got_gap -= need;
5737 }
5738 else
5739 {
5740 if (htab->got->size + need > max_before_header
5741 && htab->got->size <= max_before_header)
5742 {
5743 htab->got_gap = max_before_header - htab->got->size;
5744 htab->got->size = max_before_header + htab->got_header_size;
5745 }
5746 where = htab->got->size;
5747 htab->got->size += need;
5748 }
5749 }
5750 return where;
5751 }
5752
5753 /* Allocate space in associated reloc sections for dynamic relocs. */
5754
5755 static bfd_boolean
5756 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5757 {
5758 struct bfd_link_info *info = inf;
5759 struct ppc_elf_link_hash_entry *eh;
5760 struct ppc_elf_link_hash_table *htab;
5761 struct elf_dyn_relocs *p;
5762
5763 if (h->root.type == bfd_link_hash_indirect)
5764 return TRUE;
5765
5766 htab = ppc_elf_hash_table (info);
5767 if (htab->elf.dynamic_sections_created
5768 || h->type == STT_GNU_IFUNC)
5769 {
5770 struct plt_entry *ent;
5771 bfd_boolean doneone = FALSE;
5772 bfd_vma plt_offset = 0, glink_offset = 0;
5773 bfd_boolean dyn;
5774
5775 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5776 if (ent->plt.refcount > 0)
5777 {
5778 /* Make sure this symbol is output as a dynamic symbol. */
5779 if (h->dynindx == -1
5780 && !h->forced_local
5781 && !h->def_regular
5782 && htab->elf.dynamic_sections_created)
5783 {
5784 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5785 return FALSE;
5786 }
5787
5788 dyn = htab->elf.dynamic_sections_created;
5789 if (info->shared
5790 || h->type == STT_GNU_IFUNC
5791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5792 {
5793 asection *s = htab->plt;
5794 if (!dyn || h->dynindx == -1)
5795 s = htab->iplt;
5796
5797 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5798 {
5799 if (!doneone)
5800 {
5801 plt_offset = s->size;
5802 s->size += 4;
5803 }
5804 ent->plt.offset = plt_offset;
5805
5806 s = htab->glink;
5807 if (!doneone || info->shared)
5808 {
5809 glink_offset = s->size;
5810 s->size += GLINK_ENTRY_SIZE;
5811 if (h == htab->tls_get_addr
5812 && !htab->params->no_tls_get_addr_opt)
5813 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5814 }
5815 if (!doneone
5816 && !info->shared
5817 && h->def_dynamic
5818 && !h->def_regular)
5819 {
5820 h->root.u.def.section = s;
5821 h->root.u.def.value = glink_offset;
5822 }
5823 ent->glink_offset = glink_offset;
5824
5825 if (htab->params->emit_stub_syms
5826 && !add_stub_sym (ent, h, info))
5827 return FALSE;
5828 }
5829 else
5830 {
5831 if (!doneone)
5832 {
5833 /* If this is the first .plt entry, make room
5834 for the special first entry. */
5835 if (s->size == 0)
5836 s->size += htab->plt_initial_entry_size;
5837
5838 /* The PowerPC PLT is actually composed of two
5839 parts, the first part is 2 words (for a load
5840 and a jump), and then there is a remaining
5841 word available at the end. */
5842 plt_offset = (htab->plt_initial_entry_size
5843 + (htab->plt_slot_size
5844 * ((s->size
5845 - htab->plt_initial_entry_size)
5846 / htab->plt_entry_size)));
5847
5848 /* If this symbol is not defined in a regular
5849 file, and we are not generating a shared
5850 library, then set the symbol to this location
5851 in the .plt. This is to avoid text
5852 relocations, and is required to make
5853 function pointers compare as equal between
5854 the normal executable and the shared library. */
5855 if (! info->shared
5856 && h->def_dynamic
5857 && !h->def_regular)
5858 {
5859 h->root.u.def.section = s;
5860 h->root.u.def.value = plt_offset;
5861 }
5862
5863 /* Make room for this entry. */
5864 s->size += htab->plt_entry_size;
5865 /* After the 8192nd entry, room for two entries
5866 is allocated. */
5867 if (htab->plt_type == PLT_OLD
5868 && (s->size - htab->plt_initial_entry_size)
5869 / htab->plt_entry_size
5870 > PLT_NUM_SINGLE_ENTRIES)
5871 s->size += htab->plt_entry_size;
5872 }
5873 ent->plt.offset = plt_offset;
5874 }
5875
5876 /* We also need to make an entry in the .rela.plt section. */
5877 if (!doneone)
5878 {
5879 if (!htab->elf.dynamic_sections_created
5880 || h->dynindx == -1)
5881 htab->reliplt->size += sizeof (Elf32_External_Rela);
5882 else
5883 {
5884 htab->relplt->size += sizeof (Elf32_External_Rela);
5885
5886 if (htab->plt_type == PLT_VXWORKS)
5887 {
5888 /* Allocate space for the unloaded relocations. */
5889 if (!info->shared
5890 && htab->elf.dynamic_sections_created)
5891 {
5892 if (ent->plt.offset
5893 == (bfd_vma) htab->plt_initial_entry_size)
5894 {
5895 htab->srelplt2->size
5896 += (sizeof (Elf32_External_Rela)
5897 * VXWORKS_PLTRESOLVE_RELOCS);
5898 }
5899
5900 htab->srelplt2->size
5901 += (sizeof (Elf32_External_Rela)
5902 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5903 }
5904
5905 /* Every PLT entry has an associated GOT entry in
5906 .got.plt. */
5907 htab->sgotplt->size += 4;
5908 }
5909 }
5910 doneone = TRUE;
5911 }
5912 }
5913 else
5914 ent->plt.offset = (bfd_vma) -1;
5915 }
5916 else
5917 ent->plt.offset = (bfd_vma) -1;
5918
5919 if (!doneone)
5920 {
5921 h->plt.plist = NULL;
5922 h->needs_plt = 0;
5923 }
5924 }
5925 else
5926 {
5927 h->plt.plist = NULL;
5928 h->needs_plt = 0;
5929 }
5930
5931 eh = (struct ppc_elf_link_hash_entry *) h;
5932 if (eh->elf.got.refcount > 0)
5933 {
5934 bfd_boolean dyn;
5935 unsigned int need;
5936
5937 /* Make sure this symbol is output as a dynamic symbol. */
5938 if (eh->elf.dynindx == -1
5939 && !eh->elf.forced_local
5940 && eh->elf.type != STT_GNU_IFUNC
5941 && htab->elf.dynamic_sections_created)
5942 {
5943 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5944 return FALSE;
5945 }
5946
5947 need = 0;
5948 if ((eh->tls_mask & TLS_TLS) != 0)
5949 {
5950 if ((eh->tls_mask & TLS_LD) != 0)
5951 {
5952 if (!eh->elf.def_dynamic)
5953 /* We'll just use htab->tlsld_got.offset. This should
5954 always be the case. It's a little odd if we have
5955 a local dynamic reloc against a non-local symbol. */
5956 htab->tlsld_got.refcount += 1;
5957 else
5958 need += 8;
5959 }
5960 if ((eh->tls_mask & TLS_GD) != 0)
5961 need += 8;
5962 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5963 need += 4;
5964 if ((eh->tls_mask & TLS_DTPREL) != 0)
5965 need += 4;
5966 }
5967 else
5968 need += 4;
5969 if (need == 0)
5970 eh->elf.got.offset = (bfd_vma) -1;
5971 else
5972 {
5973 eh->elf.got.offset = allocate_got (htab, need);
5974 dyn = htab->elf.dynamic_sections_created;
5975 if ((info->shared
5976 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5977 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5978 || eh->elf.root.type != bfd_link_hash_undefweak))
5979 {
5980 asection *rsec = htab->relgot;
5981
5982 if (eh->elf.type == STT_GNU_IFUNC)
5983 rsec = htab->reliplt;
5984 /* All the entries we allocated need relocs.
5985 Except LD only needs one. */
5986 if ((eh->tls_mask & TLS_LD) != 0
5987 && eh->elf.def_dynamic)
5988 need -= 4;
5989 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5990 }
5991 }
5992 }
5993 else
5994 eh->elf.got.offset = (bfd_vma) -1;
5995
5996 if (eh->dyn_relocs == NULL
5997 || !htab->elf.dynamic_sections_created)
5998 return TRUE;
5999
6000 /* In the shared -Bsymbolic case, discard space allocated for
6001 dynamic pc-relative relocs against symbols which turn out to be
6002 defined in regular objects. For the normal shared case, discard
6003 space for relocs that have become local due to symbol visibility
6004 changes. */
6005
6006 if (info->shared)
6007 {
6008 /* Relocs that use pc_count are those that appear on a call insn,
6009 or certain REL relocs (see must_be_dyn_reloc) that can be
6010 generated via assembly. We want calls to protected symbols to
6011 resolve directly to the function rather than going via the plt.
6012 If people want function pointer comparisons to work as expected
6013 then they should avoid writing weird assembly. */
6014 if (SYMBOL_CALLS_LOCAL (info, h))
6015 {
6016 struct elf_dyn_relocs **pp;
6017
6018 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6019 {
6020 p->count -= p->pc_count;
6021 p->pc_count = 0;
6022 if (p->count == 0)
6023 *pp = p->next;
6024 else
6025 pp = &p->next;
6026 }
6027 }
6028
6029 if (htab->is_vxworks)
6030 {
6031 struct elf_dyn_relocs **pp;
6032
6033 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6034 {
6035 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6036 *pp = p->next;
6037 else
6038 pp = &p->next;
6039 }
6040 }
6041
6042 /* Discard relocs on undefined symbols that must be local. */
6043 if (eh->dyn_relocs != NULL
6044 && h->root.type == bfd_link_hash_undefined
6045 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6046 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6047 eh->dyn_relocs = NULL;
6048
6049 /* Also discard relocs on undefined weak syms with non-default
6050 visibility. */
6051 if (eh->dyn_relocs != NULL
6052 && h->root.type == bfd_link_hash_undefweak)
6053 {
6054 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6055 eh->dyn_relocs = NULL;
6056
6057 /* Make sure undefined weak symbols are output as a dynamic
6058 symbol in PIEs. */
6059 else if (h->dynindx == -1
6060 && !h->forced_local
6061 && !h->def_regular)
6062 {
6063 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6064 return FALSE;
6065 }
6066 }
6067 }
6068 else if (ELIMINATE_COPY_RELOCS)
6069 {
6070 /* For the non-shared case, discard space for relocs against
6071 symbols which turn out to need copy relocs or are not
6072 dynamic. */
6073
6074 if (!h->non_got_ref
6075 && !h->def_regular)
6076 {
6077 /* Make sure this symbol is output as a dynamic symbol.
6078 Undefined weak syms won't yet be marked as dynamic. */
6079 if (h->dynindx == -1
6080 && !h->forced_local)
6081 {
6082 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6083 return FALSE;
6084 }
6085
6086 /* If that succeeded, we know we'll be keeping all the
6087 relocs. */
6088 if (h->dynindx != -1)
6089 goto keep;
6090 }
6091
6092 eh->dyn_relocs = NULL;
6093
6094 keep: ;
6095 }
6096
6097 /* Finally, allocate space. */
6098 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6099 {
6100 asection *sreloc = elf_section_data (p->sec)->sreloc;
6101 if (eh->elf.type == STT_GNU_IFUNC)
6102 sreloc = htab->reliplt;
6103 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6104 }
6105
6106 return TRUE;
6107 }
6108
6109 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6110 read-only sections. */
6111
6112 static bfd_boolean
6113 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6114 {
6115 if (h->root.type == bfd_link_hash_indirect)
6116 return TRUE;
6117
6118 if (readonly_dynrelocs (h))
6119 {
6120 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6121
6122 /* Not an error, just cut short the traversal. */
6123 return FALSE;
6124 }
6125 return TRUE;
6126 }
6127
6128 static const unsigned char glink_eh_frame_cie[] =
6129 {
6130 0, 0, 0, 16, /* length. */
6131 0, 0, 0, 0, /* id. */
6132 1, /* CIE version. */
6133 'z', 'R', 0, /* Augmentation string. */
6134 4, /* Code alignment. */
6135 0x7c, /* Data alignment. */
6136 65, /* RA reg. */
6137 1, /* Augmentation size. */
6138 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6139 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6140 };
6141
6142 /* Set the sizes of the dynamic sections. */
6143
6144 static bfd_boolean
6145 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6146 struct bfd_link_info *info)
6147 {
6148 struct ppc_elf_link_hash_table *htab;
6149 asection *s;
6150 bfd_boolean relocs;
6151 bfd *ibfd;
6152
6153 #ifdef DEBUG
6154 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6155 #endif
6156
6157 htab = ppc_elf_hash_table (info);
6158 BFD_ASSERT (htab->elf.dynobj != NULL);
6159
6160 if (elf_hash_table (info)->dynamic_sections_created)
6161 {
6162 /* Set the contents of the .interp section to the interpreter. */
6163 if (info->executable)
6164 {
6165 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6166 BFD_ASSERT (s != NULL);
6167 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6168 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6169 }
6170 }
6171
6172 if (htab->plt_type == PLT_OLD)
6173 htab->got_header_size = 16;
6174 else if (htab->plt_type == PLT_NEW)
6175 htab->got_header_size = 12;
6176
6177 /* Set up .got offsets for local syms, and space for local dynamic
6178 relocs. */
6179 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6180 {
6181 bfd_signed_vma *local_got;
6182 bfd_signed_vma *end_local_got;
6183 struct plt_entry **local_plt;
6184 struct plt_entry **end_local_plt;
6185 char *lgot_masks;
6186 bfd_size_type locsymcount;
6187 Elf_Internal_Shdr *symtab_hdr;
6188
6189 if (!is_ppc_elf (ibfd))
6190 continue;
6191
6192 for (s = ibfd->sections; s != NULL; s = s->next)
6193 {
6194 struct ppc_dyn_relocs *p;
6195
6196 for (p = ((struct ppc_dyn_relocs *)
6197 elf_section_data (s)->local_dynrel);
6198 p != NULL;
6199 p = p->next)
6200 {
6201 if (!bfd_is_abs_section (p->sec)
6202 && bfd_is_abs_section (p->sec->output_section))
6203 {
6204 /* Input section has been discarded, either because
6205 it is a copy of a linkonce section or due to
6206 linker script /DISCARD/, so we'll be discarding
6207 the relocs too. */
6208 }
6209 else if (htab->is_vxworks
6210 && strcmp (p->sec->output_section->name,
6211 ".tls_vars") == 0)
6212 {
6213 /* Relocations in vxworks .tls_vars sections are
6214 handled specially by the loader. */
6215 }
6216 else if (p->count != 0)
6217 {
6218 asection *sreloc = elf_section_data (p->sec)->sreloc;
6219 if (p->ifunc)
6220 sreloc = htab->reliplt;
6221 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6222 if ((p->sec->output_section->flags
6223 & (SEC_READONLY | SEC_ALLOC))
6224 == (SEC_READONLY | SEC_ALLOC))
6225 info->flags |= DF_TEXTREL;
6226 }
6227 }
6228 }
6229
6230 local_got = elf_local_got_refcounts (ibfd);
6231 if (!local_got)
6232 continue;
6233
6234 symtab_hdr = &elf_symtab_hdr (ibfd);
6235 locsymcount = symtab_hdr->sh_info;
6236 end_local_got = local_got + locsymcount;
6237 local_plt = (struct plt_entry **) end_local_got;
6238 end_local_plt = local_plt + locsymcount;
6239 lgot_masks = (char *) end_local_plt;
6240
6241 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6242 if (*local_got > 0)
6243 {
6244 unsigned int need = 0;
6245 if ((*lgot_masks & TLS_TLS) != 0)
6246 {
6247 if ((*lgot_masks & TLS_GD) != 0)
6248 need += 8;
6249 if ((*lgot_masks & TLS_LD) != 0)
6250 htab->tlsld_got.refcount += 1;
6251 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6252 need += 4;
6253 if ((*lgot_masks & TLS_DTPREL) != 0)
6254 need += 4;
6255 }
6256 else
6257 need += 4;
6258 if (need == 0)
6259 *local_got = (bfd_vma) -1;
6260 else
6261 {
6262 *local_got = allocate_got (htab, need);
6263 if (info->shared)
6264 {
6265 asection *srel = htab->relgot;
6266 if ((*lgot_masks & PLT_IFUNC) != 0)
6267 srel = htab->reliplt;
6268 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6269 }
6270 }
6271 }
6272 else
6273 *local_got = (bfd_vma) -1;
6274
6275 if (htab->is_vxworks)
6276 continue;
6277
6278 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6279 for (; local_plt < end_local_plt; ++local_plt)
6280 {
6281 struct plt_entry *ent;
6282 bfd_boolean doneone = FALSE;
6283 bfd_vma plt_offset = 0, glink_offset = 0;
6284
6285 for (ent = *local_plt; ent != NULL; ent = ent->next)
6286 if (ent->plt.refcount > 0)
6287 {
6288 s = htab->iplt;
6289
6290 if (!doneone)
6291 {
6292 plt_offset = s->size;
6293 s->size += 4;
6294 }
6295 ent->plt.offset = plt_offset;
6296
6297 s = htab->glink;
6298 if (!doneone || info->shared)
6299 {
6300 glink_offset = s->size;
6301 s->size += GLINK_ENTRY_SIZE;
6302 }
6303 ent->glink_offset = glink_offset;
6304
6305 if (!doneone)
6306 {
6307 htab->reliplt->size += sizeof (Elf32_External_Rela);
6308 doneone = TRUE;
6309 }
6310 }
6311 else
6312 ent->plt.offset = (bfd_vma) -1;
6313 }
6314 }
6315
6316 /* Allocate space for global sym dynamic relocs. */
6317 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6318
6319 if (htab->tlsld_got.refcount > 0)
6320 {
6321 htab->tlsld_got.offset = allocate_got (htab, 8);
6322 if (info->shared)
6323 htab->relgot->size += sizeof (Elf32_External_Rela);
6324 }
6325 else
6326 htab->tlsld_got.offset = (bfd_vma) -1;
6327
6328 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6329 {
6330 unsigned int g_o_t = 32768;
6331
6332 /* If we haven't allocated the header, do so now. When we get here,
6333 for old plt/got the got size will be 0 to 32764 (not allocated),
6334 or 32780 to 65536 (header allocated). For new plt/got, the
6335 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6336 if (htab->got->size <= 32768)
6337 {
6338 g_o_t = htab->got->size;
6339 if (htab->plt_type == PLT_OLD)
6340 g_o_t += 4;
6341 htab->got->size += htab->got_header_size;
6342 }
6343
6344 htab->elf.hgot->root.u.def.value = g_o_t;
6345 }
6346 if (info->shared)
6347 {
6348 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6349
6350 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6351 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6352 }
6353 if (info->emitrelocations)
6354 {
6355 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6356
6357 if (sda != NULL && sda->ref_regular)
6358 sda->root.u.def.section->flags |= SEC_KEEP;
6359 sda = htab->sdata[1].sym;
6360 if (sda != NULL && sda->ref_regular)
6361 sda->root.u.def.section->flags |= SEC_KEEP;
6362 }
6363
6364 if (htab->glink != NULL
6365 && htab->glink->size != 0
6366 && htab->elf.dynamic_sections_created)
6367 {
6368 htab->glink_pltresolve = htab->glink->size;
6369 /* Space for the branch table. */
6370 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6371 /* Pad out to align the start of PLTresolve. */
6372 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6373 ? 63 : 15);
6374 htab->glink->size += GLINK_PLTRESOLVE;
6375
6376 if (htab->params->emit_stub_syms)
6377 {
6378 struct elf_link_hash_entry *sh;
6379 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6380 TRUE, FALSE, FALSE);
6381 if (sh == NULL)
6382 return FALSE;
6383 if (sh->root.type == bfd_link_hash_new)
6384 {
6385 sh->root.type = bfd_link_hash_defined;
6386 sh->root.u.def.section = htab->glink;
6387 sh->root.u.def.value = htab->glink_pltresolve;
6388 sh->ref_regular = 1;
6389 sh->def_regular = 1;
6390 sh->ref_regular_nonweak = 1;
6391 sh->forced_local = 1;
6392 sh->non_elf = 0;
6393 sh->root.linker_def = 1;
6394 }
6395 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6396 TRUE, FALSE, FALSE);
6397 if (sh == NULL)
6398 return FALSE;
6399 if (sh->root.type == bfd_link_hash_new)
6400 {
6401 sh->root.type = bfd_link_hash_defined;
6402 sh->root.u.def.section = htab->glink;
6403 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6404 sh->ref_regular = 1;
6405 sh->def_regular = 1;
6406 sh->ref_regular_nonweak = 1;
6407 sh->forced_local = 1;
6408 sh->non_elf = 0;
6409 sh->root.linker_def = 1;
6410 }
6411 }
6412 }
6413
6414 if (htab->glink != NULL
6415 && htab->glink->size != 0
6416 && htab->glink_eh_frame != NULL
6417 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6418 && _bfd_elf_eh_frame_present (info))
6419 {
6420 s = htab->glink_eh_frame;
6421 s->size = sizeof (glink_eh_frame_cie) + 20;
6422 if (info->shared)
6423 {
6424 s->size += 4;
6425 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6426 s->size += 4;
6427 }
6428 }
6429
6430 /* We've now determined the sizes of the various dynamic sections.
6431 Allocate memory for them. */
6432 relocs = FALSE;
6433 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6434 {
6435 bfd_boolean strip_section = TRUE;
6436
6437 if ((s->flags & SEC_LINKER_CREATED) == 0)
6438 continue;
6439
6440 if (s == htab->plt
6441 || s == htab->got)
6442 {
6443 /* We'd like to strip these sections if they aren't needed, but if
6444 we've exported dynamic symbols from them we must leave them.
6445 It's too late to tell BFD to get rid of the symbols. */
6446 if (htab->elf.hplt != NULL)
6447 strip_section = FALSE;
6448 /* Strip this section if we don't need it; see the
6449 comment below. */
6450 }
6451 else if (s == htab->iplt
6452 || s == htab->glink
6453 || s == htab->glink_eh_frame
6454 || s == htab->sgotplt
6455 || s == htab->sbss
6456 || s == htab->dynbss
6457 || s == htab->dynsbss)
6458 {
6459 /* Strip these too. */
6460 }
6461 else if (s == htab->sdata[0].section
6462 || s == htab->sdata[1].section)
6463 {
6464 strip_section = (s->flags & SEC_KEEP) == 0;
6465 }
6466 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6467 ".rela"))
6468 {
6469 if (s->size != 0)
6470 {
6471 /* Remember whether there are any relocation sections. */
6472 relocs = TRUE;
6473
6474 /* We use the reloc_count field as a counter if we need
6475 to copy relocs into the output file. */
6476 s->reloc_count = 0;
6477 }
6478 }
6479 else
6480 {
6481 /* It's not one of our sections, so don't allocate space. */
6482 continue;
6483 }
6484
6485 if (s->size == 0 && strip_section)
6486 {
6487 /* If we don't need this section, strip it from the
6488 output file. This is mostly to handle .rela.bss and
6489 .rela.plt. We must create both sections in
6490 create_dynamic_sections, because they must be created
6491 before the linker maps input sections to output
6492 sections. The linker does that before
6493 adjust_dynamic_symbol is called, and it is that
6494 function which decides whether anything needs to go
6495 into these sections. */
6496 s->flags |= SEC_EXCLUDE;
6497 continue;
6498 }
6499
6500 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6501 continue;
6502
6503 /* Allocate memory for the section contents. */
6504 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6505 if (s->contents == NULL)
6506 return FALSE;
6507 }
6508
6509 if (htab->elf.dynamic_sections_created)
6510 {
6511 /* Add some entries to the .dynamic section. We fill in the
6512 values later, in ppc_elf_finish_dynamic_sections, but we
6513 must add the entries now so that we get the correct size for
6514 the .dynamic section. The DT_DEBUG entry is filled in by the
6515 dynamic linker and used by the debugger. */
6516 #define add_dynamic_entry(TAG, VAL) \
6517 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6518
6519 if (info->executable)
6520 {
6521 if (!add_dynamic_entry (DT_DEBUG, 0))
6522 return FALSE;
6523 }
6524
6525 if (htab->plt != NULL && htab->plt->size != 0)
6526 {
6527 if (!add_dynamic_entry (DT_PLTGOT, 0)
6528 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6529 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6530 || !add_dynamic_entry (DT_JMPREL, 0))
6531 return FALSE;
6532 }
6533
6534 if (htab->plt_type == PLT_NEW
6535 && htab->glink != NULL
6536 && htab->glink->size != 0)
6537 {
6538 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6539 return FALSE;
6540 if (!htab->params->no_tls_get_addr_opt
6541 && htab->tls_get_addr != NULL
6542 && htab->tls_get_addr->plt.plist != NULL
6543 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6544 return FALSE;
6545 }
6546
6547 if (relocs)
6548 {
6549 if (!add_dynamic_entry (DT_RELA, 0)
6550 || !add_dynamic_entry (DT_RELASZ, 0)
6551 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6552 return FALSE;
6553 }
6554
6555 /* If any dynamic relocs apply to a read-only section, then we
6556 need a DT_TEXTREL entry. */
6557 if ((info->flags & DF_TEXTREL) == 0)
6558 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6559 info);
6560
6561 if ((info->flags & DF_TEXTREL) != 0)
6562 {
6563 if (!add_dynamic_entry (DT_TEXTREL, 0))
6564 return FALSE;
6565 }
6566 if (htab->is_vxworks
6567 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6568 return FALSE;
6569 }
6570 #undef add_dynamic_entry
6571
6572 if (htab->glink_eh_frame != NULL
6573 && htab->glink_eh_frame->contents != NULL)
6574 {
6575 unsigned char *p = htab->glink_eh_frame->contents;
6576 bfd_vma val;
6577
6578 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6579 /* CIE length (rewrite in case little-endian). */
6580 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6581 p += sizeof (glink_eh_frame_cie);
6582 /* FDE length. */
6583 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6584 bfd_put_32 (htab->elf.dynobj, val, p);
6585 p += 4;
6586 /* CIE pointer. */
6587 val = p - htab->glink_eh_frame->contents;
6588 bfd_put_32 (htab->elf.dynobj, val, p);
6589 p += 4;
6590 /* Offset to .glink. Set later. */
6591 p += 4;
6592 /* .glink size. */
6593 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6594 p += 4;
6595 /* Augmentation. */
6596 p += 1;
6597
6598 if (info->shared
6599 && htab->elf.dynamic_sections_created)
6600 {
6601 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6602 if (adv < 64)
6603 *p++ = DW_CFA_advance_loc + adv;
6604 else if (adv < 256)
6605 {
6606 *p++ = DW_CFA_advance_loc1;
6607 *p++ = adv;
6608 }
6609 else if (adv < 65536)
6610 {
6611 *p++ = DW_CFA_advance_loc2;
6612 bfd_put_16 (htab->elf.dynobj, adv, p);
6613 p += 2;
6614 }
6615 else
6616 {
6617 *p++ = DW_CFA_advance_loc4;
6618 bfd_put_32 (htab->elf.dynobj, adv, p);
6619 p += 4;
6620 }
6621 *p++ = DW_CFA_register;
6622 *p++ = 65;
6623 p++;
6624 *p++ = DW_CFA_advance_loc + 4;
6625 *p++ = DW_CFA_restore_extended;
6626 *p++ = 65;
6627 }
6628 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6629 == htab->glink_eh_frame->size);
6630 }
6631
6632 return TRUE;
6633 }
6634
6635 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6636 if it looks like nothing is using them. */
6637
6638 static void
6639 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6640 {
6641 struct elf_link_hash_entry *sda = lsect->sym;
6642
6643 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6644 {
6645 asection *s;
6646
6647 s = bfd_get_section_by_name (output_bfd, lsect->name);
6648 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6649 {
6650 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6651 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6652 {
6653 sda->def_regular = 0;
6654 /* This is somewhat magic. See elf_link_output_extsym. */
6655 sda->ref_dynamic = 1;
6656 sda->forced_local = 0;
6657 }
6658 }
6659 }
6660 }
6661
6662 void
6663 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6664 {
6665 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6666
6667 if (htab != NULL)
6668 {
6669 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6670 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6671 }
6672 }
6673
6674
6675 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6676
6677 static bfd_boolean
6678 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6679 {
6680 if (h->plt.plist != NULL
6681 && !h->def_regular
6682 && (!h->pointer_equality_needed
6683 || !h->ref_regular_nonweak))
6684 return FALSE;
6685
6686 return _bfd_elf_hash_symbol (h);
6687 }
6688 \f
6689 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6690
6691 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6692 used for some functions that are allowed to break the ABI). */
6693 static const int shared_stub_entry[] =
6694 {
6695 0x7c0802a6, /* mflr 0 */
6696 0x429f0005, /* bcl 20, 31, .Lxxx */
6697 0x7d8802a6, /* mflr 12 */
6698 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6699 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6700 0x7c0803a6, /* mtlr 0 */
6701 0x7d8903a6, /* mtctr 12 */
6702 0x4e800420, /* bctr */
6703 };
6704
6705 static const int stub_entry[] =
6706 {
6707 0x3d800000, /* lis 12,xxx@ha */
6708 0x398c0000, /* addi 12,12,xxx@l */
6709 0x7d8903a6, /* mtctr 12 */
6710 0x4e800420, /* bctr */
6711 };
6712
6713 struct ppc_elf_relax_info
6714 {
6715 unsigned int workaround_size;
6716 };
6717
6718 /* This function implements long branch trampolines, and the ppc476
6719 icache bug workaround. Any section needing trampolines or patch
6720 space for the workaround has its size extended so that we can
6721 add trampolines at the end of the section. */
6722
6723 static bfd_boolean
6724 ppc_elf_relax_section (bfd *abfd,
6725 asection *isec,
6726 struct bfd_link_info *link_info,
6727 bfd_boolean *again)
6728 {
6729 struct one_fixup
6730 {
6731 struct one_fixup *next;
6732 asection *tsec;
6733 /* Final link, can use the symbol offset. For a
6734 relocatable link we use the symbol's index. */
6735 bfd_vma toff;
6736 bfd_vma trampoff;
6737 };
6738
6739 Elf_Internal_Shdr *symtab_hdr;
6740 bfd_byte *contents = NULL;
6741 Elf_Internal_Sym *isymbuf = NULL;
6742 Elf_Internal_Rela *internal_relocs = NULL;
6743 Elf_Internal_Rela *irel, *irelend = NULL;
6744 struct one_fixup *fixups = NULL;
6745 struct ppc_elf_relax_info *relax_info = NULL;
6746 unsigned changes = 0;
6747 bfd_boolean workaround_change;
6748 struct ppc_elf_link_hash_table *htab;
6749 bfd_size_type trampbase, trampoff, newsize;
6750 asection *got2;
6751 bfd_boolean maybe_pasted;
6752
6753 *again = FALSE;
6754
6755 /* No need to do anything with non-alloc or non-code sections. */
6756 if ((isec->flags & SEC_ALLOC) == 0
6757 || (isec->flags & SEC_CODE) == 0
6758 || (isec->flags & SEC_LINKER_CREATED) != 0
6759 || isec->size < 4)
6760 return TRUE;
6761
6762 /* We cannot represent the required PIC relocs in the output, so don't
6763 do anything. The linker doesn't support mixing -shared and -r
6764 anyway. */
6765 if (link_info->relocatable && link_info->shared)
6766 return TRUE;
6767
6768 htab = ppc_elf_hash_table (link_info);
6769 if (htab == NULL)
6770 return TRUE;
6771
6772 isec->size = (isec->size + 3) & -4;
6773 if (isec->rawsize == 0)
6774 isec->rawsize = isec->size;
6775 trampbase = isec->size;
6776
6777 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6778 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6779 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6780
6781 if (htab->params->ppc476_workaround)
6782 {
6783 if (elf_section_data (isec)->sec_info == NULL)
6784 {
6785 elf_section_data (isec)->sec_info
6786 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6787 if (elf_section_data (isec)->sec_info == NULL)
6788 return FALSE;
6789 }
6790 relax_info = elf_section_data (isec)->sec_info;
6791 trampbase -= relax_info->workaround_size;
6792 }
6793
6794 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6795 || strcmp (isec->output_section->name, ".fini") == 0);
6796 /* Space for a branch around any trampolines. */
6797 trampoff = trampbase;
6798 if (maybe_pasted && trampbase == isec->rawsize)
6799 trampoff += 4;
6800
6801 symtab_hdr = &elf_symtab_hdr (abfd);
6802
6803 if (htab->params->branch_trampolines)
6804 {
6805 /* Get a copy of the native relocations. */
6806 if (isec->reloc_count != 0)
6807 {
6808 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6809 link_info->keep_memory);
6810 if (internal_relocs == NULL)
6811 goto error_return;
6812 }
6813
6814 got2 = bfd_get_section_by_name (abfd, ".got2");
6815
6816 irelend = internal_relocs + isec->reloc_count;
6817 for (irel = internal_relocs; irel < irelend; irel++)
6818 {
6819 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6820 bfd_vma toff, roff;
6821 asection *tsec;
6822 struct one_fixup *f;
6823 size_t insn_offset = 0;
6824 bfd_vma max_branch_offset, val;
6825 bfd_byte *hit_addr;
6826 unsigned long t0;
6827 struct elf_link_hash_entry *h;
6828 struct plt_entry **plist;
6829 unsigned char sym_type;
6830
6831 switch (r_type)
6832 {
6833 case R_PPC_REL24:
6834 case R_PPC_LOCAL24PC:
6835 case R_PPC_PLTREL24:
6836 max_branch_offset = 1 << 25;
6837 break;
6838
6839 case R_PPC_REL14:
6840 case R_PPC_REL14_BRTAKEN:
6841 case R_PPC_REL14_BRNTAKEN:
6842 max_branch_offset = 1 << 15;
6843 break;
6844
6845 default:
6846 continue;
6847 }
6848
6849 /* Get the value of the symbol referred to by the reloc. */
6850 h = NULL;
6851 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6852 {
6853 /* A local symbol. */
6854 Elf_Internal_Sym *isym;
6855
6856 /* Read this BFD's local symbols. */
6857 if (isymbuf == NULL)
6858 {
6859 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6860 if (isymbuf == NULL)
6861 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6862 symtab_hdr->sh_info, 0,
6863 NULL, NULL, NULL);
6864 if (isymbuf == 0)
6865 goto error_return;
6866 }
6867 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6868 if (isym->st_shndx == SHN_UNDEF)
6869 tsec = bfd_und_section_ptr;
6870 else if (isym->st_shndx == SHN_ABS)
6871 tsec = bfd_abs_section_ptr;
6872 else if (isym->st_shndx == SHN_COMMON)
6873 tsec = bfd_com_section_ptr;
6874 else
6875 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6876
6877 toff = isym->st_value;
6878 sym_type = ELF_ST_TYPE (isym->st_info);
6879 }
6880 else
6881 {
6882 /* Global symbol handling. */
6883 unsigned long indx;
6884
6885 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6886 h = elf_sym_hashes (abfd)[indx];
6887
6888 while (h->root.type == bfd_link_hash_indirect
6889 || h->root.type == bfd_link_hash_warning)
6890 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6891
6892 if (h->root.type == bfd_link_hash_defined
6893 || h->root.type == bfd_link_hash_defweak)
6894 {
6895 tsec = h->root.u.def.section;
6896 toff = h->root.u.def.value;
6897 }
6898 else if (h->root.type == bfd_link_hash_undefined
6899 || h->root.type == bfd_link_hash_undefweak)
6900 {
6901 tsec = bfd_und_section_ptr;
6902 toff = link_info->relocatable ? indx : 0;
6903 }
6904 else
6905 continue;
6906
6907 /* If this branch is to __tls_get_addr then we may later
6908 optimise away the call. We won't be needing a long-
6909 branch stub in that case. */
6910 if (link_info->executable
6911 && !link_info->relocatable
6912 && h == htab->tls_get_addr
6913 && irel != internal_relocs)
6914 {
6915 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6916 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6917 unsigned int tls_mask = 0;
6918
6919 /* The previous reloc should be one of R_PPC_TLSGD or
6920 R_PPC_TLSLD, or for older object files, a reloc
6921 on the __tls_get_addr arg setup insn. Get tls
6922 mask bits from the symbol on that reloc. */
6923 if (t_symndx < symtab_hdr->sh_info)
6924 {
6925 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6926
6927 if (local_got_offsets != NULL)
6928 {
6929 struct plt_entry **local_plt = (struct plt_entry **)
6930 (local_got_offsets + symtab_hdr->sh_info);
6931 char *lgot_masks = (char *)
6932 (local_plt + symtab_hdr->sh_info);
6933 tls_mask = lgot_masks[t_symndx];
6934 }
6935 }
6936 else
6937 {
6938 struct elf_link_hash_entry *th
6939 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6940
6941 while (th->root.type == bfd_link_hash_indirect
6942 || th->root.type == bfd_link_hash_warning)
6943 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6944
6945 tls_mask
6946 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6947 }
6948
6949 /* The mask bits tell us if the call will be
6950 optimised away. */
6951 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6952 && (t_rtype == R_PPC_TLSGD
6953 || t_rtype == R_PPC_GOT_TLSGD16
6954 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6955 continue;
6956 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6957 && (t_rtype == R_PPC_TLSLD
6958 || t_rtype == R_PPC_GOT_TLSLD16
6959 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6960 continue;
6961 }
6962
6963 sym_type = h->type;
6964 }
6965
6966 /* The condition here under which we call find_plt_ent must
6967 match that in relocate_section. If we call find_plt_ent here
6968 but not in relocate_section, or vice versa, then the branch
6969 destination used here may be incorrect. */
6970 plist = NULL;
6971 if (h != NULL)
6972 {
6973 /* We know is_branch_reloc (r_type) is true. */
6974 if (h->type == STT_GNU_IFUNC
6975 || r_type == R_PPC_PLTREL24)
6976 plist = &h->plt.plist;
6977 }
6978 else if (sym_type == STT_GNU_IFUNC
6979 && elf_local_got_offsets (abfd) != NULL)
6980 {
6981 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6982 struct plt_entry **local_plt = (struct plt_entry **)
6983 (local_got_offsets + symtab_hdr->sh_info);
6984 plist = local_plt + ELF32_R_SYM (irel->r_info);
6985 }
6986 if (plist != NULL)
6987 {
6988 bfd_vma addend = 0;
6989 struct plt_entry *ent;
6990
6991 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6992 addend = irel->r_addend;
6993 ent = find_plt_ent (plist, got2, addend);
6994 if (ent != NULL)
6995 {
6996 if (htab->plt_type == PLT_NEW
6997 || h == NULL
6998 || !htab->elf.dynamic_sections_created
6999 || h->dynindx == -1)
7000 {
7001 tsec = htab->glink;
7002 toff = ent->glink_offset;
7003 }
7004 else
7005 {
7006 tsec = htab->plt;
7007 toff = ent->plt.offset;
7008 }
7009 }
7010 }
7011
7012 /* If the branch and target are in the same section, you have
7013 no hope of adding stubs. We'll error out later should the
7014 branch overflow. */
7015 if (tsec == isec)
7016 continue;
7017
7018 /* There probably isn't any reason to handle symbols in
7019 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7020 attribute for a code section, and we are only looking at
7021 branches. However, implement it correctly here as a
7022 reference for other target relax_section functions. */
7023 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7024 {
7025 /* At this stage in linking, no SEC_MERGE symbol has been
7026 adjusted, so all references to such symbols need to be
7027 passed through _bfd_merged_section_offset. (Later, in
7028 relocate_section, all SEC_MERGE symbols *except* for
7029 section symbols have been adjusted.)
7030
7031 gas may reduce relocations against symbols in SEC_MERGE
7032 sections to a relocation against the section symbol when
7033 the original addend was zero. When the reloc is against
7034 a section symbol we should include the addend in the
7035 offset passed to _bfd_merged_section_offset, since the
7036 location of interest is the original symbol. On the
7037 other hand, an access to "sym+addend" where "sym" is not
7038 a section symbol should not include the addend; Such an
7039 access is presumed to be an offset from "sym"; The
7040 location of interest is just "sym". */
7041 if (sym_type == STT_SECTION)
7042 toff += irel->r_addend;
7043
7044 toff
7045 = _bfd_merged_section_offset (abfd, &tsec,
7046 elf_section_data (tsec)->sec_info,
7047 toff);
7048
7049 if (sym_type != STT_SECTION)
7050 toff += irel->r_addend;
7051 }
7052 /* PLTREL24 addends are special. */
7053 else if (r_type != R_PPC_PLTREL24)
7054 toff += irel->r_addend;
7055
7056 /* Attempted -shared link of non-pic code loses. */
7057 if ((!link_info->relocatable
7058 && tsec == bfd_und_section_ptr)
7059 || tsec->output_section == NULL
7060 || (tsec->owner != NULL
7061 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7062 continue;
7063
7064 roff = irel->r_offset;
7065
7066 /* If the branch is in range, no need to do anything. */
7067 if (tsec != bfd_und_section_ptr
7068 && (!link_info->relocatable
7069 /* A relocatable link may have sections moved during
7070 final link, so do not presume they remain in range. */
7071 || tsec->output_section == isec->output_section))
7072 {
7073 bfd_vma symaddr, reladdr;
7074
7075 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7076 reladdr = isec->output_section->vma + isec->output_offset + roff;
7077 if (symaddr - reladdr + max_branch_offset
7078 < 2 * max_branch_offset)
7079 continue;
7080 }
7081
7082 /* Look for an existing fixup to this address. */
7083 for (f = fixups; f ; f = f->next)
7084 if (f->tsec == tsec && f->toff == toff)
7085 break;
7086
7087 if (f == NULL)
7088 {
7089 size_t size;
7090 unsigned long stub_rtype;
7091
7092 val = trampoff - roff;
7093 if (val >= max_branch_offset)
7094 /* Oh dear, we can't reach a trampoline. Don't try to add
7095 one. We'll report an error later. */
7096 continue;
7097
7098 if (link_info->shared)
7099 {
7100 size = 4 * ARRAY_SIZE (shared_stub_entry);
7101 insn_offset = 12;
7102 }
7103 else
7104 {
7105 size = 4 * ARRAY_SIZE (stub_entry);
7106 insn_offset = 0;
7107 }
7108 stub_rtype = R_PPC_RELAX;
7109 if (tsec == htab->plt
7110 || tsec == htab->glink)
7111 {
7112 stub_rtype = R_PPC_RELAX_PLT;
7113 if (r_type == R_PPC_PLTREL24)
7114 stub_rtype = R_PPC_RELAX_PLTREL24;
7115 }
7116
7117 /* Hijack the old relocation. Since we need two
7118 relocations for this use a "composite" reloc. */
7119 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7120 stub_rtype);
7121 irel->r_offset = trampoff + insn_offset;
7122 if (r_type == R_PPC_PLTREL24
7123 && stub_rtype != R_PPC_RELAX_PLTREL24)
7124 irel->r_addend = 0;
7125
7126 /* Record the fixup so we don't do it again this section. */
7127 f = bfd_malloc (sizeof (*f));
7128 f->next = fixups;
7129 f->tsec = tsec;
7130 f->toff = toff;
7131 f->trampoff = trampoff;
7132 fixups = f;
7133
7134 trampoff += size;
7135 changes++;
7136 }
7137 else
7138 {
7139 val = f->trampoff - roff;
7140 if (val >= max_branch_offset)
7141 continue;
7142
7143 /* Nop out the reloc, since we're finalizing things here. */
7144 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7145 }
7146
7147 /* Get the section contents. */
7148 if (contents == NULL)
7149 {
7150 /* Get cached copy if it exists. */
7151 if (elf_section_data (isec)->this_hdr.contents != NULL)
7152 contents = elf_section_data (isec)->this_hdr.contents;
7153 /* Go get them off disk. */
7154 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7155 goto error_return;
7156 }
7157
7158 /* Fix up the existing branch to hit the trampoline. */
7159 hit_addr = contents + roff;
7160 switch (r_type)
7161 {
7162 case R_PPC_REL24:
7163 case R_PPC_LOCAL24PC:
7164 case R_PPC_PLTREL24:
7165 t0 = bfd_get_32 (abfd, hit_addr);
7166 t0 &= ~0x3fffffc;
7167 t0 |= val & 0x3fffffc;
7168 bfd_put_32 (abfd, t0, hit_addr);
7169 break;
7170
7171 case R_PPC_REL14:
7172 case R_PPC_REL14_BRTAKEN:
7173 case R_PPC_REL14_BRNTAKEN:
7174 t0 = bfd_get_32 (abfd, hit_addr);
7175 t0 &= ~0xfffc;
7176 t0 |= val & 0xfffc;
7177 bfd_put_32 (abfd, t0, hit_addr);
7178 break;
7179 }
7180 }
7181
7182 while (fixups != NULL)
7183 {
7184 struct one_fixup *f = fixups;
7185 fixups = fixups->next;
7186 free (f);
7187 }
7188 }
7189
7190 workaround_change = FALSE;
7191 newsize = trampoff;
7192 if (htab->params->ppc476_workaround
7193 && (!link_info->relocatable
7194 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7195 {
7196 bfd_vma addr, end_addr;
7197 unsigned int crossings;
7198 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7199
7200 addr = isec->output_section->vma + isec->output_offset;
7201 end_addr = addr + trampoff;
7202 addr &= -pagesize;
7203 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7204 if (crossings != 0)
7205 {
7206 /* Keep space aligned, to ensure the patch code itself does
7207 not cross a page. Don't decrease size calculated on a
7208 previous pass as otherwise we might never settle on a layout. */
7209 newsize = 15 - ((end_addr - 1) & 15);
7210 newsize += crossings * 16;
7211 if (relax_info->workaround_size < newsize)
7212 {
7213 relax_info->workaround_size = newsize;
7214 workaround_change = TRUE;
7215 }
7216 /* Ensure relocate_section is called. */
7217 isec->flags |= SEC_RELOC;
7218 }
7219 newsize = trampoff + relax_info->workaround_size;
7220 }
7221
7222 if (changes || workaround_change)
7223 isec->size = newsize;
7224
7225 if (isymbuf != NULL
7226 && symtab_hdr->contents != (unsigned char *) isymbuf)
7227 {
7228 if (! link_info->keep_memory)
7229 free (isymbuf);
7230 else
7231 {
7232 /* Cache the symbols for elf_link_input_bfd. */
7233 symtab_hdr->contents = (unsigned char *) isymbuf;
7234 }
7235 }
7236
7237 if (contents != NULL
7238 && elf_section_data (isec)->this_hdr.contents != contents)
7239 {
7240 if (!changes && !link_info->keep_memory)
7241 free (contents);
7242 else
7243 {
7244 /* Cache the section contents for elf_link_input_bfd. */
7245 elf_section_data (isec)->this_hdr.contents = contents;
7246 }
7247 }
7248
7249 if (changes != 0)
7250 {
7251 /* Append sufficient NOP relocs so we can write out relocation
7252 information for the trampolines. */
7253 Elf_Internal_Shdr *rel_hdr;
7254 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7255 * sizeof (*new_relocs));
7256 unsigned ix;
7257
7258 if (!new_relocs)
7259 goto error_return;
7260 memcpy (new_relocs, internal_relocs,
7261 isec->reloc_count * sizeof (*new_relocs));
7262 for (ix = changes; ix--;)
7263 {
7264 irel = new_relocs + ix + isec->reloc_count;
7265
7266 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7267 }
7268 if (internal_relocs != elf_section_data (isec)->relocs)
7269 free (internal_relocs);
7270 elf_section_data (isec)->relocs = new_relocs;
7271 isec->reloc_count += changes;
7272 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7273 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7274 }
7275 else if (internal_relocs != NULL
7276 && elf_section_data (isec)->relocs != internal_relocs)
7277 free (internal_relocs);
7278
7279 *again = changes != 0 || workaround_change;
7280 return TRUE;
7281
7282 error_return:
7283 while (fixups != NULL)
7284 {
7285 struct one_fixup *f = fixups;
7286 fixups = fixups->next;
7287 free (f);
7288 }
7289 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7290 free (isymbuf);
7291 if (contents != NULL
7292 && elf_section_data (isec)->this_hdr.contents != contents)
7293 free (contents);
7294 if (internal_relocs != NULL
7295 && elf_section_data (isec)->relocs != internal_relocs)
7296 free (internal_relocs);
7297 return FALSE;
7298 }
7299 \f
7300 /* What to do when ld finds relocations against symbols defined in
7301 discarded sections. */
7302
7303 static unsigned int
7304 ppc_elf_action_discarded (asection *sec)
7305 {
7306 if (strcmp (".fixup", sec->name) == 0)
7307 return 0;
7308
7309 if (strcmp (".got2", sec->name) == 0)
7310 return 0;
7311
7312 return _bfd_elf_default_action_discarded (sec);
7313 }
7314 \f
7315 /* Fill in the address for a pointer generated in a linker section. */
7316
7317 static bfd_vma
7318 elf_finish_pointer_linker_section (bfd *input_bfd,
7319 elf_linker_section_t *lsect,
7320 struct elf_link_hash_entry *h,
7321 bfd_vma relocation,
7322 const Elf_Internal_Rela *rel)
7323 {
7324 elf_linker_section_pointers_t *linker_section_ptr;
7325
7326 BFD_ASSERT (lsect != NULL);
7327
7328 if (h != NULL)
7329 {
7330 /* Handle global symbol. */
7331 struct ppc_elf_link_hash_entry *eh;
7332
7333 eh = (struct ppc_elf_link_hash_entry *) h;
7334 BFD_ASSERT (eh->elf.def_regular);
7335 linker_section_ptr = eh->linker_section_pointer;
7336 }
7337 else
7338 {
7339 /* Handle local symbol. */
7340 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7341
7342 BFD_ASSERT (is_ppc_elf (input_bfd));
7343 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7344 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7345 }
7346
7347 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7348 rel->r_addend,
7349 lsect);
7350 BFD_ASSERT (linker_section_ptr != NULL);
7351
7352 /* Offset will always be a multiple of four, so use the bottom bit
7353 as a "written" flag. */
7354 if ((linker_section_ptr->offset & 1) == 0)
7355 {
7356 bfd_put_32 (lsect->section->owner,
7357 relocation + linker_section_ptr->addend,
7358 lsect->section->contents + linker_section_ptr->offset);
7359 linker_section_ptr->offset += 1;
7360 }
7361
7362 relocation = (lsect->section->output_section->vma
7363 + lsect->section->output_offset
7364 + linker_section_ptr->offset - 1
7365 - SYM_VAL (lsect->sym));
7366
7367 #ifdef DEBUG
7368 fprintf (stderr,
7369 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7370 lsect->name, (long) relocation, (long) relocation);
7371 #endif
7372
7373 return relocation;
7374 }
7375
7376 #define PPC_LO(v) ((v) & 0xffff)
7377 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7378 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7379
7380 static void
7381 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7382 struct bfd_link_info *info)
7383 {
7384 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7385 bfd *output_bfd = info->output_bfd;
7386 bfd_vma plt;
7387
7388 plt = ((ent->plt.offset & ~1)
7389 + plt_sec->output_section->vma
7390 + plt_sec->output_offset);
7391
7392 if (info->shared)
7393 {
7394 bfd_vma got = 0;
7395
7396 if (ent->addend >= 32768)
7397 got = (ent->addend
7398 + ent->sec->output_section->vma
7399 + ent->sec->output_offset);
7400 else if (htab->elf.hgot != NULL)
7401 got = SYM_VAL (htab->elf.hgot);
7402
7403 plt -= got;
7404
7405 if (plt + 0x8000 < 0x10000)
7406 {
7407 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7408 p += 4;
7409 bfd_put_32 (output_bfd, MTCTR_11, p);
7410 p += 4;
7411 bfd_put_32 (output_bfd, BCTR, p);
7412 p += 4;
7413 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7414 p += 4;
7415 }
7416 else
7417 {
7418 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7419 p += 4;
7420 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7421 p += 4;
7422 bfd_put_32 (output_bfd, MTCTR_11, p);
7423 p += 4;
7424 bfd_put_32 (output_bfd, BCTR, p);
7425 p += 4;
7426 }
7427 }
7428 else
7429 {
7430 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7431 p += 4;
7432 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7433 p += 4;
7434 bfd_put_32 (output_bfd, MTCTR_11, p);
7435 p += 4;
7436 bfd_put_32 (output_bfd, BCTR, p);
7437 p += 4;
7438 }
7439 }
7440
7441 /* Return true if symbol is defined statically. */
7442
7443 static bfd_boolean
7444 is_static_defined (struct elf_link_hash_entry *h)
7445 {
7446 return ((h->root.type == bfd_link_hash_defined
7447 || h->root.type == bfd_link_hash_defweak)
7448 && h->root.u.def.section != NULL
7449 && h->root.u.def.section->output_section != NULL);
7450 }
7451
7452 /* If INSN is an opcode that may be used with an @tls operand, return
7453 the transformed insn for TLS optimisation, otherwise return 0. If
7454 REG is non-zero only match an insn with RB or RA equal to REG. */
7455
7456 unsigned int
7457 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7458 {
7459 unsigned int rtra;
7460
7461 if ((insn & (0x3f << 26)) != 31 << 26)
7462 return 0;
7463
7464 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7465 rtra = insn & ((1 << 26) - (1 << 16));
7466 else if (((insn >> 16) & 0x1f) == reg)
7467 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7468 else
7469 return 0;
7470
7471 if ((insn & (0x3ff << 1)) == 266 << 1)
7472 /* add -> addi. */
7473 insn = 14 << 26;
7474 else if ((insn & (0x1f << 1)) == 23 << 1
7475 && ((insn & (0x1f << 6)) < 14 << 6
7476 || ((insn & (0x1f << 6)) >= 16 << 6
7477 && (insn & (0x1f << 6)) < 24 << 6)))
7478 /* load and store indexed -> dform. */
7479 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7480 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7481 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7482 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7483 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7484 /* lwax -> lwa. */
7485 insn = (58 << 26) | 2;
7486 else
7487 return 0;
7488 insn |= rtra;
7489 return insn;
7490 }
7491
7492 /* If INSN is an opcode that may be used with an @tprel operand, return
7493 the transformed insn for an undefined weak symbol, ie. with the
7494 thread pointer REG operand removed. Otherwise return 0. */
7495
7496 unsigned int
7497 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7498 {
7499 if ((insn & (0x1f << 16)) == reg << 16
7500 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7501 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7502 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7503 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7504 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7505 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7506 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7507 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7508 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7509 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7510 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7511 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7512 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7513 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7514 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7515 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7516 && (insn & 3) != 1)
7517 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7518 && ((insn & 3) == 0 || (insn & 3) == 3))))
7519 {
7520 insn &= ~(0x1f << 16);
7521 }
7522 else if ((insn & (0x1f << 21)) == reg << 21
7523 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7524 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7525 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7526 {
7527 insn &= ~(0x1f << 21);
7528 insn |= (insn & (0x1f << 16)) << 5;
7529 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7530 insn -= 2 >> 26; /* convert to ori,oris */
7531 }
7532 else
7533 insn = 0;
7534 return insn;
7535 }
7536
7537 static bfd_boolean
7538 is_insn_ds_form (unsigned int insn)
7539 {
7540 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7541 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7542 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7543 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7544 }
7545
7546 static bfd_boolean
7547 is_insn_dq_form (unsigned int insn)
7548 {
7549 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7550 }
7551
7552 /* The RELOCATE_SECTION function is called by the ELF backend linker
7553 to handle the relocations for a section.
7554
7555 The relocs are always passed as Rela structures; if the section
7556 actually uses Rel structures, the r_addend field will always be
7557 zero.
7558
7559 This function is responsible for adjust the section contents as
7560 necessary, and (if using Rela relocs and generating a
7561 relocatable output file) adjusting the reloc addend as
7562 necessary.
7563
7564 This function does not have to worry about setting the reloc
7565 address or the reloc symbol index.
7566
7567 LOCAL_SYMS is a pointer to the swapped in local symbols.
7568
7569 LOCAL_SECTIONS is an array giving the section in the input file
7570 corresponding to the st_shndx field of each local symbol.
7571
7572 The global hash table entry for the global symbols can be found
7573 via elf_sym_hashes (input_bfd).
7574
7575 When generating relocatable output, this function must handle
7576 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7577 going to be the section symbol corresponding to the output
7578 section, which means that the addend must be adjusted
7579 accordingly. */
7580
7581 static bfd_boolean
7582 ppc_elf_relocate_section (bfd *output_bfd,
7583 struct bfd_link_info *info,
7584 bfd *input_bfd,
7585 asection *input_section,
7586 bfd_byte *contents,
7587 Elf_Internal_Rela *relocs,
7588 Elf_Internal_Sym *local_syms,
7589 asection **local_sections)
7590 {
7591 Elf_Internal_Shdr *symtab_hdr;
7592 struct elf_link_hash_entry **sym_hashes;
7593 struct ppc_elf_link_hash_table *htab;
7594 Elf_Internal_Rela *rel;
7595 Elf_Internal_Rela *relend;
7596 Elf_Internal_Rela outrel;
7597 asection *got2;
7598 bfd_vma *local_got_offsets;
7599 bfd_boolean ret = TRUE;
7600 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7601 bfd_boolean is_vxworks_tls;
7602
7603 #ifdef DEBUG
7604 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7605 "%ld relocations%s",
7606 input_bfd, input_section,
7607 (long) input_section->reloc_count,
7608 (info->relocatable) ? " (relocatable)" : "");
7609 #endif
7610
7611 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7612
7613 /* Initialize howto table if not already done. */
7614 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7615 ppc_elf_howto_init ();
7616
7617 htab = ppc_elf_hash_table (info);
7618 local_got_offsets = elf_local_got_offsets (input_bfd);
7619 symtab_hdr = &elf_symtab_hdr (input_bfd);
7620 sym_hashes = elf_sym_hashes (input_bfd);
7621 /* We have to handle relocations in vxworks .tls_vars sections
7622 specially, because the dynamic loader is 'weird'. */
7623 is_vxworks_tls = (htab->is_vxworks && info->shared
7624 && !strcmp (input_section->output_section->name,
7625 ".tls_vars"));
7626 rel = relocs;
7627 relend = relocs + input_section->reloc_count;
7628 for (; rel < relend; rel++)
7629 {
7630 enum elf_ppc_reloc_type r_type;
7631 bfd_vma addend;
7632 bfd_reloc_status_type r;
7633 Elf_Internal_Sym *sym;
7634 asection *sec;
7635 struct elf_link_hash_entry *h;
7636 const char *sym_name;
7637 reloc_howto_type *howto;
7638 unsigned long r_symndx;
7639 bfd_vma relocation;
7640 bfd_vma branch_bit, from;
7641 bfd_boolean unresolved_reloc;
7642 bfd_boolean warned;
7643 unsigned int tls_type, tls_mask, tls_gd;
7644 struct plt_entry **ifunc;
7645 struct reloc_howto_struct alt_howto;
7646
7647 r_type = ELF32_R_TYPE (rel->r_info);
7648 sym = NULL;
7649 sec = NULL;
7650 h = NULL;
7651 unresolved_reloc = FALSE;
7652 warned = FALSE;
7653 r_symndx = ELF32_R_SYM (rel->r_info);
7654
7655 if (r_symndx < symtab_hdr->sh_info)
7656 {
7657 sym = local_syms + r_symndx;
7658 sec = local_sections[r_symndx];
7659 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7660
7661 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7662 }
7663 else
7664 {
7665 bfd_boolean ignored;
7666
7667 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7668 r_symndx, symtab_hdr, sym_hashes,
7669 h, sec, relocation,
7670 unresolved_reloc, warned, ignored);
7671
7672 sym_name = h->root.root.string;
7673 }
7674
7675 if (sec != NULL && discarded_section (sec))
7676 {
7677 /* For relocs against symbols from removed linkonce sections,
7678 or sections discarded by a linker script, we just want the
7679 section contents zeroed. Avoid any special processing. */
7680 howto = NULL;
7681 if (r_type < R_PPC_max)
7682 howto = ppc_elf_howto_table[r_type];
7683 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7684 rel, 1, relend, howto, 0, contents);
7685 }
7686
7687 if (info->relocatable)
7688 {
7689 if (got2 != NULL
7690 && r_type == R_PPC_PLTREL24
7691 && rel->r_addend != 0)
7692 {
7693 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7694 addend specifies the GOT pointer offset within .got2. */
7695 rel->r_addend += got2->output_offset;
7696 }
7697 if (r_type != R_PPC_RELAX_PLT
7698 && r_type != R_PPC_RELAX_PLTREL24
7699 && r_type != R_PPC_RELAX)
7700 continue;
7701 }
7702
7703 /* TLS optimizations. Replace instruction sequences and relocs
7704 based on information we collected in tls_optimize. We edit
7705 RELOCS so that --emit-relocs will output something sensible
7706 for the final instruction stream. */
7707 tls_mask = 0;
7708 tls_gd = 0;
7709 if (h != NULL)
7710 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7711 else if (local_got_offsets != NULL)
7712 {
7713 struct plt_entry **local_plt;
7714 char *lgot_masks;
7715 local_plt
7716 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7717 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7718 tls_mask = lgot_masks[r_symndx];
7719 }
7720
7721 /* Ensure reloc mapping code below stays sane. */
7722 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7723 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7724 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7725 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7726 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7727 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7728 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7729 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7730 abort ();
7731 switch (r_type)
7732 {
7733 default:
7734 break;
7735
7736 case R_PPC_GOT_TPREL16:
7737 case R_PPC_GOT_TPREL16_LO:
7738 if ((tls_mask & TLS_TLS) != 0
7739 && (tls_mask & TLS_TPREL) == 0)
7740 {
7741 bfd_vma insn;
7742
7743 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7744 insn &= 31 << 21;
7745 insn |= 0x3c020000; /* addis 0,2,0 */
7746 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7747 r_type = R_PPC_TPREL16_HA;
7748 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7749 }
7750 break;
7751
7752 case R_PPC_TLS:
7753 if ((tls_mask & TLS_TLS) != 0
7754 && (tls_mask & TLS_TPREL) == 0)
7755 {
7756 bfd_vma insn;
7757
7758 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7759 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7760 if (insn == 0)
7761 abort ();
7762 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7763 r_type = R_PPC_TPREL16_LO;
7764 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7765
7766 /* Was PPC_TLS which sits on insn boundary, now
7767 PPC_TPREL16_LO which is at low-order half-word. */
7768 rel->r_offset += d_offset;
7769 }
7770 break;
7771
7772 case R_PPC_GOT_TLSGD16_HI:
7773 case R_PPC_GOT_TLSGD16_HA:
7774 tls_gd = TLS_TPRELGD;
7775 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7776 goto tls_gdld_hi;
7777 break;
7778
7779 case R_PPC_GOT_TLSLD16_HI:
7780 case R_PPC_GOT_TLSLD16_HA:
7781 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7782 {
7783 tls_gdld_hi:
7784 if ((tls_mask & tls_gd) != 0)
7785 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7786 + R_PPC_GOT_TPREL16);
7787 else
7788 {
7789 rel->r_offset -= d_offset;
7790 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7791 r_type = R_PPC_NONE;
7792 }
7793 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7794 }
7795 break;
7796
7797 case R_PPC_GOT_TLSGD16:
7798 case R_PPC_GOT_TLSGD16_LO:
7799 tls_gd = TLS_TPRELGD;
7800 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7801 goto tls_ldgd_opt;
7802 break;
7803
7804 case R_PPC_GOT_TLSLD16:
7805 case R_PPC_GOT_TLSLD16_LO:
7806 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7807 {
7808 unsigned int insn1, insn2;
7809 bfd_vma offset;
7810
7811 tls_ldgd_opt:
7812 offset = (bfd_vma) -1;
7813 /* If not using the newer R_PPC_TLSGD/LD to mark
7814 __tls_get_addr calls, we must trust that the call
7815 stays with its arg setup insns, ie. that the next
7816 reloc is the __tls_get_addr call associated with
7817 the current reloc. Edit both insns. */
7818 if (input_section->has_tls_get_addr_call
7819 && rel + 1 < relend
7820 && branch_reloc_hash_match (input_bfd, rel + 1,
7821 htab->tls_get_addr))
7822 offset = rel[1].r_offset;
7823 /* We read the low GOT_TLS insn because we need to keep
7824 the destination reg. It may be something other than
7825 the usual r3, and moved to r3 before the call by
7826 intervening code. */
7827 insn1 = bfd_get_32 (output_bfd,
7828 contents + rel->r_offset - d_offset);
7829 if ((tls_mask & tls_gd) != 0)
7830 {
7831 /* IE */
7832 insn1 &= (0x1f << 21) | (0x1f << 16);
7833 insn1 |= 32 << 26; /* lwz */
7834 if (offset != (bfd_vma) -1)
7835 {
7836 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7837 insn2 = 0x7c631214; /* add 3,3,2 */
7838 bfd_put_32 (output_bfd, insn2, contents + offset);
7839 }
7840 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7841 + R_PPC_GOT_TPREL16);
7842 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7843 }
7844 else
7845 {
7846 /* LE */
7847 insn1 &= 0x1f << 21;
7848 insn1 |= 0x3c020000; /* addis r,2,0 */
7849 if (tls_gd == 0)
7850 {
7851 /* Was an LD reloc. */
7852 for (r_symndx = 0;
7853 r_symndx < symtab_hdr->sh_info;
7854 r_symndx++)
7855 if (local_sections[r_symndx] == sec)
7856 break;
7857 if (r_symndx >= symtab_hdr->sh_info)
7858 r_symndx = STN_UNDEF;
7859 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7860 if (r_symndx != STN_UNDEF)
7861 rel->r_addend -= (local_syms[r_symndx].st_value
7862 + sec->output_offset
7863 + sec->output_section->vma);
7864 }
7865 r_type = R_PPC_TPREL16_HA;
7866 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7867 if (offset != (bfd_vma) -1)
7868 {
7869 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7870 rel[1].r_offset = offset + d_offset;
7871 rel[1].r_addend = rel->r_addend;
7872 insn2 = 0x38630000; /* addi 3,3,0 */
7873 bfd_put_32 (output_bfd, insn2, contents + offset);
7874 }
7875 }
7876 bfd_put_32 (output_bfd, insn1,
7877 contents + rel->r_offset - d_offset);
7878 if (tls_gd == 0)
7879 {
7880 /* We changed the symbol on an LD reloc. Start over
7881 in order to get h, sym, sec etc. right. */
7882 rel--;
7883 continue;
7884 }
7885 }
7886 break;
7887
7888 case R_PPC_TLSGD:
7889 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7890 {
7891 unsigned int insn2;
7892 bfd_vma offset = rel->r_offset;
7893
7894 if ((tls_mask & TLS_TPRELGD) != 0)
7895 {
7896 /* IE */
7897 r_type = R_PPC_NONE;
7898 insn2 = 0x7c631214; /* add 3,3,2 */
7899 }
7900 else
7901 {
7902 /* LE */
7903 r_type = R_PPC_TPREL16_LO;
7904 rel->r_offset += d_offset;
7905 insn2 = 0x38630000; /* addi 3,3,0 */
7906 }
7907 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7908 bfd_put_32 (output_bfd, insn2, contents + offset);
7909 /* Zap the reloc on the _tls_get_addr call too. */
7910 BFD_ASSERT (offset == rel[1].r_offset);
7911 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7912 }
7913 break;
7914
7915 case R_PPC_TLSLD:
7916 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7917 {
7918 unsigned int insn2;
7919
7920 for (r_symndx = 0;
7921 r_symndx < symtab_hdr->sh_info;
7922 r_symndx++)
7923 if (local_sections[r_symndx] == sec)
7924 break;
7925 if (r_symndx >= symtab_hdr->sh_info)
7926 r_symndx = STN_UNDEF;
7927 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7928 if (r_symndx != STN_UNDEF)
7929 rel->r_addend -= (local_syms[r_symndx].st_value
7930 + sec->output_offset
7931 + sec->output_section->vma);
7932
7933 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7934 rel->r_offset += d_offset;
7935 insn2 = 0x38630000; /* addi 3,3,0 */
7936 bfd_put_32 (output_bfd, insn2,
7937 contents + rel->r_offset - d_offset);
7938 /* Zap the reloc on the _tls_get_addr call too. */
7939 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7940 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7941 rel--;
7942 continue;
7943 }
7944 break;
7945 }
7946
7947 /* Handle other relocations that tweak non-addend part of insn. */
7948 branch_bit = 0;
7949 switch (r_type)
7950 {
7951 default:
7952 break;
7953
7954 /* Branch taken prediction relocations. */
7955 case R_PPC_ADDR14_BRTAKEN:
7956 case R_PPC_REL14_BRTAKEN:
7957 branch_bit = BRANCH_PREDICT_BIT;
7958 /* Fall thru */
7959
7960 /* Branch not taken prediction relocations. */
7961 case R_PPC_ADDR14_BRNTAKEN:
7962 case R_PPC_REL14_BRNTAKEN:
7963 {
7964 bfd_vma insn;
7965
7966 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7967 insn &= ~BRANCH_PREDICT_BIT;
7968 insn |= branch_bit;
7969
7970 from = (rel->r_offset
7971 + input_section->output_offset
7972 + input_section->output_section->vma);
7973
7974 /* Invert 'y' bit if not the default. */
7975 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7976 insn ^= BRANCH_PREDICT_BIT;
7977
7978 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7979 break;
7980 }
7981 }
7982
7983 ifunc = NULL;
7984 if (!htab->is_vxworks)
7985 {
7986 struct plt_entry *ent;
7987
7988 if (h != NULL)
7989 {
7990 if (h->type == STT_GNU_IFUNC)
7991 ifunc = &h->plt.plist;
7992 }
7993 else if (local_got_offsets != NULL
7994 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7995 {
7996 struct plt_entry **local_plt;
7997
7998 local_plt = (struct plt_entry **) (local_got_offsets
7999 + symtab_hdr->sh_info);
8000 ifunc = local_plt + r_symndx;
8001 }
8002
8003 ent = NULL;
8004 if (ifunc != NULL
8005 && (!info->shared
8006 || is_branch_reloc (r_type)))
8007 {
8008 addend = 0;
8009 if (r_type == R_PPC_PLTREL24 && info->shared)
8010 addend = rel->r_addend;
8011 ent = find_plt_ent (ifunc, got2, addend);
8012 }
8013 if (ent != NULL)
8014 {
8015 if (h == NULL && (ent->plt.offset & 1) == 0)
8016 {
8017 Elf_Internal_Rela rela;
8018 bfd_byte *loc;
8019
8020 rela.r_offset = (htab->iplt->output_section->vma
8021 + htab->iplt->output_offset
8022 + ent->plt.offset);
8023 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8024 rela.r_addend = relocation;
8025 loc = htab->reliplt->contents;
8026 loc += (htab->reliplt->reloc_count++
8027 * sizeof (Elf32_External_Rela));
8028 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8029
8030 ent->plt.offset |= 1;
8031 }
8032 if (h == NULL && (ent->glink_offset & 1) == 0)
8033 {
8034 unsigned char *p = ((unsigned char *) htab->glink->contents
8035 + ent->glink_offset);
8036 write_glink_stub (ent, htab->iplt, p, info);
8037 ent->glink_offset |= 1;
8038 }
8039
8040 unresolved_reloc = FALSE;
8041 if (htab->plt_type == PLT_NEW
8042 || !htab->elf.dynamic_sections_created
8043 || h == NULL
8044 || h->dynindx == -1)
8045 relocation = (htab->glink->output_section->vma
8046 + htab->glink->output_offset
8047 + (ent->glink_offset & ~1));
8048 else
8049 relocation = (htab->plt->output_section->vma
8050 + htab->plt->output_offset
8051 + ent->plt.offset);
8052 }
8053 }
8054
8055 addend = rel->r_addend;
8056 tls_type = 0;
8057 howto = NULL;
8058 if (r_type < R_PPC_max)
8059 howto = ppc_elf_howto_table[r_type];
8060 switch (r_type)
8061 {
8062 default:
8063 info->callbacks->einfo
8064 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8065 input_bfd, (int) r_type, sym_name);
8066
8067 bfd_set_error (bfd_error_bad_value);
8068 ret = FALSE;
8069 continue;
8070
8071 case R_PPC_NONE:
8072 case R_PPC_TLS:
8073 case R_PPC_TLSGD:
8074 case R_PPC_TLSLD:
8075 case R_PPC_EMB_MRKREF:
8076 case R_PPC_GNU_VTINHERIT:
8077 case R_PPC_GNU_VTENTRY:
8078 continue;
8079
8080 /* GOT16 relocations. Like an ADDR16 using the symbol's
8081 address in the GOT as relocation value instead of the
8082 symbol's value itself. Also, create a GOT entry for the
8083 symbol and put the symbol value there. */
8084 case R_PPC_GOT_TLSGD16:
8085 case R_PPC_GOT_TLSGD16_LO:
8086 case R_PPC_GOT_TLSGD16_HI:
8087 case R_PPC_GOT_TLSGD16_HA:
8088 tls_type = TLS_TLS | TLS_GD;
8089 goto dogot;
8090
8091 case R_PPC_GOT_TLSLD16:
8092 case R_PPC_GOT_TLSLD16_LO:
8093 case R_PPC_GOT_TLSLD16_HI:
8094 case R_PPC_GOT_TLSLD16_HA:
8095 tls_type = TLS_TLS | TLS_LD;
8096 goto dogot;
8097
8098 case R_PPC_GOT_TPREL16:
8099 case R_PPC_GOT_TPREL16_LO:
8100 case R_PPC_GOT_TPREL16_HI:
8101 case R_PPC_GOT_TPREL16_HA:
8102 tls_type = TLS_TLS | TLS_TPREL;
8103 goto dogot;
8104
8105 case R_PPC_GOT_DTPREL16:
8106 case R_PPC_GOT_DTPREL16_LO:
8107 case R_PPC_GOT_DTPREL16_HI:
8108 case R_PPC_GOT_DTPREL16_HA:
8109 tls_type = TLS_TLS | TLS_DTPREL;
8110 goto dogot;
8111
8112 case R_PPC_GOT16:
8113 case R_PPC_GOT16_LO:
8114 case R_PPC_GOT16_HI:
8115 case R_PPC_GOT16_HA:
8116 tls_mask = 0;
8117 dogot:
8118 {
8119 /* Relocation is to the entry for this symbol in the global
8120 offset table. */
8121 bfd_vma off;
8122 bfd_vma *offp;
8123 unsigned long indx;
8124
8125 if (htab->got == NULL)
8126 abort ();
8127
8128 indx = 0;
8129 if (tls_type == (TLS_TLS | TLS_LD)
8130 && (h == NULL
8131 || !h->def_dynamic))
8132 offp = &htab->tlsld_got.offset;
8133 else if (h != NULL)
8134 {
8135 bfd_boolean dyn;
8136 dyn = htab->elf.dynamic_sections_created;
8137 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8138 || (info->shared
8139 && SYMBOL_REFERENCES_LOCAL (info, h)))
8140 /* This is actually a static link, or it is a
8141 -Bsymbolic link and the symbol is defined
8142 locally, or the symbol was forced to be local
8143 because of a version file. */
8144 ;
8145 else
8146 {
8147 BFD_ASSERT (h->dynindx != -1);
8148 indx = h->dynindx;
8149 unresolved_reloc = FALSE;
8150 }
8151 offp = &h->got.offset;
8152 }
8153 else
8154 {
8155 if (local_got_offsets == NULL)
8156 abort ();
8157 offp = &local_got_offsets[r_symndx];
8158 }
8159
8160 /* The offset must always be a multiple of 4. We use the
8161 least significant bit to record whether we have already
8162 processed this entry. */
8163 off = *offp;
8164 if ((off & 1) != 0)
8165 off &= ~1;
8166 else
8167 {
8168 unsigned int tls_m = (tls_mask
8169 & (TLS_LD | TLS_GD | TLS_DTPREL
8170 | TLS_TPREL | TLS_TPRELGD));
8171
8172 if (offp == &htab->tlsld_got.offset)
8173 tls_m = TLS_LD;
8174 else if (h == NULL
8175 || !h->def_dynamic)
8176 tls_m &= ~TLS_LD;
8177
8178 /* We might have multiple got entries for this sym.
8179 Initialize them all. */
8180 do
8181 {
8182 int tls_ty = 0;
8183
8184 if ((tls_m & TLS_LD) != 0)
8185 {
8186 tls_ty = TLS_TLS | TLS_LD;
8187 tls_m &= ~TLS_LD;
8188 }
8189 else if ((tls_m & TLS_GD) != 0)
8190 {
8191 tls_ty = TLS_TLS | TLS_GD;
8192 tls_m &= ~TLS_GD;
8193 }
8194 else if ((tls_m & TLS_DTPREL) != 0)
8195 {
8196 tls_ty = TLS_TLS | TLS_DTPREL;
8197 tls_m &= ~TLS_DTPREL;
8198 }
8199 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8200 {
8201 tls_ty = TLS_TLS | TLS_TPREL;
8202 tls_m = 0;
8203 }
8204
8205 /* Generate relocs for the dynamic linker. */
8206 if ((info->shared || indx != 0)
8207 && (offp == &htab->tlsld_got.offset
8208 || h == NULL
8209 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8210 || h->root.type != bfd_link_hash_undefweak))
8211 {
8212 asection *rsec = htab->relgot;
8213 bfd_byte * loc;
8214
8215 if (ifunc != NULL)
8216 rsec = htab->reliplt;
8217 outrel.r_offset = (htab->got->output_section->vma
8218 + htab->got->output_offset
8219 + off);
8220 outrel.r_addend = 0;
8221 if (tls_ty & (TLS_LD | TLS_GD))
8222 {
8223 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8224 if (tls_ty == (TLS_TLS | TLS_GD))
8225 {
8226 loc = rsec->contents;
8227 loc += (rsec->reloc_count++
8228 * sizeof (Elf32_External_Rela));
8229 bfd_elf32_swap_reloca_out (output_bfd,
8230 &outrel, loc);
8231 outrel.r_offset += 4;
8232 outrel.r_info
8233 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8234 }
8235 }
8236 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8237 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8238 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8239 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8240 else if (indx != 0)
8241 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8242 else if (ifunc != NULL)
8243 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8244 else
8245 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8246 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8247 {
8248 outrel.r_addend += relocation;
8249 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8250 {
8251 if (htab->elf.tls_sec == NULL)
8252 outrel.r_addend = 0;
8253 else
8254 outrel.r_addend -= htab->elf.tls_sec->vma;
8255 }
8256 }
8257 loc = rsec->contents;
8258 loc += (rsec->reloc_count++
8259 * sizeof (Elf32_External_Rela));
8260 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8261 }
8262
8263 /* Init the .got section contents if we're not
8264 emitting a reloc. */
8265 else
8266 {
8267 bfd_vma value = relocation;
8268
8269 if (tls_ty == (TLS_TLS | TLS_LD))
8270 value = 1;
8271 else if (tls_ty != 0)
8272 {
8273 if (htab->elf.tls_sec == NULL)
8274 value = 0;
8275 else
8276 {
8277 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8278 if (tls_ty == (TLS_TLS | TLS_TPREL))
8279 value += DTP_OFFSET - TP_OFFSET;
8280 }
8281
8282 if (tls_ty == (TLS_TLS | TLS_GD))
8283 {
8284 bfd_put_32 (output_bfd, value,
8285 htab->got->contents + off + 4);
8286 value = 1;
8287 }
8288 }
8289 bfd_put_32 (output_bfd, value,
8290 htab->got->contents + off);
8291 }
8292
8293 off += 4;
8294 if (tls_ty & (TLS_LD | TLS_GD))
8295 off += 4;
8296 }
8297 while (tls_m != 0);
8298
8299 off = *offp;
8300 *offp = off | 1;
8301 }
8302
8303 if (off >= (bfd_vma) -2)
8304 abort ();
8305
8306 if ((tls_type & TLS_TLS) != 0)
8307 {
8308 if (tls_type != (TLS_TLS | TLS_LD))
8309 {
8310 if ((tls_mask & TLS_LD) != 0
8311 && !(h == NULL
8312 || !h->def_dynamic))
8313 off += 8;
8314 if (tls_type != (TLS_TLS | TLS_GD))
8315 {
8316 if ((tls_mask & TLS_GD) != 0)
8317 off += 8;
8318 if (tls_type != (TLS_TLS | TLS_DTPREL))
8319 {
8320 if ((tls_mask & TLS_DTPREL) != 0)
8321 off += 4;
8322 }
8323 }
8324 }
8325 }
8326
8327 relocation = (htab->got->output_section->vma
8328 + htab->got->output_offset
8329 + off
8330 - SYM_VAL (htab->elf.hgot));
8331
8332 /* Addends on got relocations don't make much sense.
8333 x+off@got is actually x@got+off, and since the got is
8334 generated by a hash table traversal, the value in the
8335 got at entry m+n bears little relation to the entry m. */
8336 if (addend != 0)
8337 info->callbacks->einfo
8338 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8339 input_bfd, input_section, rel->r_offset,
8340 howto->name,
8341 sym_name);
8342 }
8343 break;
8344
8345 /* Relocations that need no special processing. */
8346 case R_PPC_LOCAL24PC:
8347 /* It makes no sense to point a local relocation
8348 at a symbol not in this object. */
8349 if (unresolved_reloc)
8350 {
8351 if (! (*info->callbacks->undefined_symbol) (info,
8352 h->root.root.string,
8353 input_bfd,
8354 input_section,
8355 rel->r_offset,
8356 TRUE))
8357 return FALSE;
8358 continue;
8359 }
8360 break;
8361
8362 case R_PPC_DTPREL16:
8363 case R_PPC_DTPREL16_LO:
8364 case R_PPC_DTPREL16_HI:
8365 case R_PPC_DTPREL16_HA:
8366 if (htab->elf.tls_sec != NULL)
8367 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8368 break;
8369
8370 /* Relocations that may need to be propagated if this is a shared
8371 object. */
8372 case R_PPC_TPREL16:
8373 case R_PPC_TPREL16_LO:
8374 case R_PPC_TPREL16_HI:
8375 case R_PPC_TPREL16_HA:
8376 if (h != NULL
8377 && h->root.type == bfd_link_hash_undefweak
8378 && h->dynindx == -1)
8379 {
8380 /* Make this relocation against an undefined weak symbol
8381 resolve to zero. This is really just a tweak, since
8382 code using weak externs ought to check that they are
8383 defined before using them. */
8384 bfd_byte *p = contents + rel->r_offset - d_offset;
8385 unsigned int insn = bfd_get_32 (output_bfd, p);
8386 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8387 if (insn != 0)
8388 bfd_put_32 (output_bfd, insn, p);
8389 break;
8390 }
8391 if (htab->elf.tls_sec != NULL)
8392 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8393 /* The TPREL16 relocs shouldn't really be used in shared
8394 libs as they will result in DT_TEXTREL being set, but
8395 support them anyway. */
8396 goto dodyn;
8397
8398 case R_PPC_TPREL32:
8399 if (htab->elf.tls_sec != NULL)
8400 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8401 goto dodyn;
8402
8403 case R_PPC_DTPREL32:
8404 if (htab->elf.tls_sec != NULL)
8405 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8406 goto dodyn;
8407
8408 case R_PPC_DTPMOD32:
8409 relocation = 1;
8410 addend = 0;
8411 goto dodyn;
8412
8413 case R_PPC_REL16:
8414 case R_PPC_REL16_LO:
8415 case R_PPC_REL16_HI:
8416 case R_PPC_REL16_HA:
8417 break;
8418
8419 case R_PPC_REL32:
8420 if (h == NULL || h == htab->elf.hgot)
8421 break;
8422 /* fall through */
8423
8424 case R_PPC_ADDR32:
8425 case R_PPC_ADDR16:
8426 case R_PPC_ADDR16_LO:
8427 case R_PPC_ADDR16_HI:
8428 case R_PPC_ADDR16_HA:
8429 case R_PPC_UADDR32:
8430 case R_PPC_UADDR16:
8431 goto dodyn;
8432
8433 case R_PPC_VLE_REL8:
8434 case R_PPC_VLE_REL15:
8435 case R_PPC_VLE_REL24:
8436 case R_PPC_REL24:
8437 case R_PPC_REL14:
8438 case R_PPC_REL14_BRTAKEN:
8439 case R_PPC_REL14_BRNTAKEN:
8440 /* If these relocations are not to a named symbol, they can be
8441 handled right here, no need to bother the dynamic linker. */
8442 if (SYMBOL_CALLS_LOCAL (info, h)
8443 || h == htab->elf.hgot)
8444 break;
8445 /* fall through */
8446
8447 case R_PPC_ADDR24:
8448 case R_PPC_ADDR14:
8449 case R_PPC_ADDR14_BRTAKEN:
8450 case R_PPC_ADDR14_BRNTAKEN:
8451 if (h != NULL && !info->shared)
8452 break;
8453 /* fall through */
8454
8455 dodyn:
8456 if ((input_section->flags & SEC_ALLOC) == 0
8457 || is_vxworks_tls)
8458 break;
8459
8460 if ((info->shared
8461 && !(h != NULL
8462 && ((h->root.type == bfd_link_hash_undefined
8463 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8464 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8465 || (h->root.type == bfd_link_hash_undefweak
8466 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8467 && (must_be_dyn_reloc (info, r_type)
8468 || !SYMBOL_CALLS_LOCAL (info, h)))
8469 || (ELIMINATE_COPY_RELOCS
8470 && !info->shared
8471 && h != NULL
8472 && h->dynindx != -1
8473 && !h->non_got_ref
8474 && !h->def_regular))
8475 {
8476 int skip;
8477 bfd_byte *loc;
8478 asection *sreloc;
8479 #ifdef DEBUG
8480 fprintf (stderr, "ppc_elf_relocate_section needs to "
8481 "create relocation for %s\n",
8482 (h && h->root.root.string
8483 ? h->root.root.string : "<unknown>"));
8484 #endif
8485
8486 /* When generating a shared object, these relocations
8487 are copied into the output file to be resolved at run
8488 time. */
8489 sreloc = elf_section_data (input_section)->sreloc;
8490 if (ifunc)
8491 sreloc = htab->reliplt;
8492 if (sreloc == NULL)
8493 return FALSE;
8494
8495 skip = 0;
8496 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8497 input_section,
8498 rel->r_offset);
8499 if (outrel.r_offset == (bfd_vma) -1
8500 || outrel.r_offset == (bfd_vma) -2)
8501 skip = (int) outrel.r_offset;
8502 outrel.r_offset += (input_section->output_section->vma
8503 + input_section->output_offset);
8504
8505 if (skip)
8506 memset (&outrel, 0, sizeof outrel);
8507 else if ((h != NULL
8508 && (h->root.type == bfd_link_hash_undefined
8509 || h->root.type == bfd_link_hash_undefweak))
8510 || !SYMBOL_REFERENCES_LOCAL (info, h))
8511 {
8512 BFD_ASSERT (h->dynindx != -1);
8513 unresolved_reloc = FALSE;
8514 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8515 outrel.r_addend = rel->r_addend;
8516 }
8517 else
8518 {
8519 outrel.r_addend = relocation + rel->r_addend;
8520
8521 if (r_type != R_PPC_ADDR32)
8522 {
8523 long indx = 0;
8524
8525 if (ifunc != NULL)
8526 {
8527 /* If we get here when building a static
8528 executable, then the libc startup function
8529 responsible for applying indirect function
8530 relocations is going to complain about
8531 the reloc type.
8532 If we get here when building a dynamic
8533 executable, it will be because we have
8534 a text relocation. The dynamic loader
8535 will set the text segment writable and
8536 non-executable to apply text relocations.
8537 So we'll segfault when trying to run the
8538 indirection function to resolve the reloc. */
8539 info->callbacks->einfo
8540 (_("%P: %H: relocation %s for indirect "
8541 "function %s unsupported\n"),
8542 input_bfd, input_section, rel->r_offset,
8543 howto->name,
8544 sym_name);
8545 ret = FALSE;
8546 }
8547 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8548 ;
8549 else if (sec == NULL || sec->owner == NULL)
8550 {
8551 bfd_set_error (bfd_error_bad_value);
8552 ret = FALSE;
8553 }
8554 else
8555 {
8556 asection *osec;
8557
8558 /* We are turning this relocation into one
8559 against a section symbol. It would be
8560 proper to subtract the symbol's value,
8561 osec->vma, from the emitted reloc addend,
8562 but ld.so expects buggy relocs.
8563 FIXME: Why not always use a zero index? */
8564 osec = sec->output_section;
8565 indx = elf_section_data (osec)->dynindx;
8566 if (indx == 0)
8567 {
8568 osec = htab->elf.text_index_section;
8569 indx = elf_section_data (osec)->dynindx;
8570 }
8571 BFD_ASSERT (indx != 0);
8572 #ifdef DEBUG
8573 if (indx == 0)
8574 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8575 indx, osec->name, osec->flags,
8576 h->root.root.string);
8577 #endif
8578 }
8579
8580 outrel.r_info = ELF32_R_INFO (indx, r_type);
8581 }
8582 else if (ifunc != NULL)
8583 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8584 else
8585 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8586 }
8587
8588 loc = sreloc->contents;
8589 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8590 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8591
8592 if (skip == -1)
8593 continue;
8594
8595 /* This reloc will be computed at runtime. We clear the memory
8596 so that it contains predictable value. */
8597 if (! skip
8598 && ((input_section->flags & SEC_ALLOC) != 0
8599 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8600 {
8601 relocation = howto->pc_relative ? outrel.r_offset : 0;
8602 addend = 0;
8603 break;
8604 }
8605 }
8606 break;
8607
8608 case R_PPC_RELAX_PLT:
8609 case R_PPC_RELAX_PLTREL24:
8610 if (h != NULL)
8611 {
8612 struct plt_entry *ent;
8613 bfd_vma got2_addend = 0;
8614
8615 if (r_type == R_PPC_RELAX_PLTREL24)
8616 {
8617 if (info->shared)
8618 got2_addend = addend;
8619 addend = 0;
8620 }
8621 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8622 if (htab->plt_type == PLT_NEW)
8623 relocation = (htab->glink->output_section->vma
8624 + htab->glink->output_offset
8625 + ent->glink_offset);
8626 else
8627 relocation = (htab->plt->output_section->vma
8628 + htab->plt->output_offset
8629 + ent->plt.offset);
8630 }
8631 /* Fall thru */
8632
8633 case R_PPC_RELAX:
8634 {
8635 const int *stub;
8636 size_t size;
8637 size_t insn_offset = rel->r_offset;
8638 unsigned int insn;
8639
8640 if (info->shared)
8641 {
8642 relocation -= (input_section->output_section->vma
8643 + input_section->output_offset
8644 + rel->r_offset - 4);
8645 stub = shared_stub_entry;
8646 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8647 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8648 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8649 stub += 3;
8650 size = ARRAY_SIZE (shared_stub_entry) - 3;
8651 }
8652 else
8653 {
8654 stub = stub_entry;
8655 size = ARRAY_SIZE (stub_entry);
8656 }
8657
8658 relocation += addend;
8659 if (info->relocatable)
8660 relocation = 0;
8661
8662 /* First insn is HA, second is LO. */
8663 insn = *stub++;
8664 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8665 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8666 insn_offset += 4;
8667
8668 insn = *stub++;
8669 insn |= relocation & 0xffff;
8670 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8671 insn_offset += 4;
8672 size -= 2;
8673
8674 while (size != 0)
8675 {
8676 insn = *stub++;
8677 --size;
8678 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8679 insn_offset += 4;
8680 }
8681
8682 /* Rewrite the reloc and convert one of the trailing nop
8683 relocs to describe this relocation. */
8684 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8685 /* The relocs are at the bottom 2 bytes */
8686 rel[0].r_offset += d_offset;
8687 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8688 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8689 rel[1].r_offset += 4;
8690 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8691 rel++;
8692 }
8693 continue;
8694
8695 /* Indirect .sdata relocation. */
8696 case R_PPC_EMB_SDAI16:
8697 BFD_ASSERT (htab->sdata[0].section != NULL);
8698 if (!is_static_defined (htab->sdata[0].sym))
8699 {
8700 unresolved_reloc = TRUE;
8701 break;
8702 }
8703 relocation
8704 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8705 h, relocation, rel);
8706 addend = 0;
8707 break;
8708
8709 /* Indirect .sdata2 relocation. */
8710 case R_PPC_EMB_SDA2I16:
8711 BFD_ASSERT (htab->sdata[1].section != NULL);
8712 if (!is_static_defined (htab->sdata[1].sym))
8713 {
8714 unresolved_reloc = TRUE;
8715 break;
8716 }
8717 relocation
8718 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8719 h, relocation, rel);
8720 addend = 0;
8721 break;
8722
8723 /* Handle the TOC16 reloc. We want to use the offset within the .got
8724 section, not the actual VMA. This is appropriate when generating
8725 an embedded ELF object, for which the .got section acts like the
8726 AIX .toc section. */
8727 case R_PPC_TOC16: /* phony GOT16 relocations */
8728 if (sec == NULL || sec->output_section == NULL)
8729 {
8730 unresolved_reloc = TRUE;
8731 break;
8732 }
8733 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8734 ".got") == 0
8735 || strcmp (bfd_get_section_name (sec->owner, sec),
8736 ".cgot") == 0);
8737
8738 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8739 break;
8740
8741 case R_PPC_PLTREL24:
8742 if (h != NULL && ifunc == NULL)
8743 {
8744 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8745 info->shared ? addend : 0);
8746 if (ent == NULL
8747 || htab->plt == NULL)
8748 {
8749 /* We didn't make a PLT entry for this symbol. This
8750 happens when statically linking PIC code, or when
8751 using -Bsymbolic. */
8752 }
8753 else
8754 {
8755 /* Relocation is to the entry for this symbol in the
8756 procedure linkage table. */
8757 unresolved_reloc = FALSE;
8758 if (htab->plt_type == PLT_NEW)
8759 relocation = (htab->glink->output_section->vma
8760 + htab->glink->output_offset
8761 + ent->glink_offset);
8762 else
8763 relocation = (htab->plt->output_section->vma
8764 + htab->plt->output_offset
8765 + ent->plt.offset);
8766 }
8767 }
8768
8769 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8770 addend specifies the GOT pointer offset within .got2.
8771 Don't apply it to the relocation field. */
8772 addend = 0;
8773 break;
8774
8775 /* Relocate against _SDA_BASE_. */
8776 case R_PPC_SDAREL16:
8777 {
8778 const char *name;
8779 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8780
8781 if (sec == NULL
8782 || sec->output_section == NULL
8783 || !is_static_defined (sda))
8784 {
8785 unresolved_reloc = TRUE;
8786 break;
8787 }
8788 addend -= SYM_VAL (sda);
8789
8790 name = bfd_get_section_name (output_bfd, sec->output_section);
8791 if (!(strcmp (name, ".sdata") == 0
8792 || strcmp (name, ".sbss") == 0))
8793 {
8794 info->callbacks->einfo
8795 (_("%P: %B: the target (%s) of a %s relocation is "
8796 "in the wrong output section (%s)\n"),
8797 input_bfd,
8798 sym_name,
8799 howto->name,
8800 name);
8801 }
8802 }
8803 break;
8804
8805 /* Relocate against _SDA2_BASE_. */
8806 case R_PPC_EMB_SDA2REL:
8807 {
8808 const char *name;
8809 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8810
8811 if (sec == NULL
8812 || sec->output_section == NULL
8813 || !is_static_defined (sda))
8814 {
8815 unresolved_reloc = TRUE;
8816 break;
8817 }
8818 addend -= SYM_VAL (sda);
8819
8820 name = bfd_get_section_name (output_bfd, sec->output_section);
8821 if (!(strcmp (name, ".sdata2") == 0
8822 || strcmp (name, ".sbss2") == 0))
8823 {
8824 info->callbacks->einfo
8825 (_("%P: %B: the target (%s) of a %s relocation is "
8826 "in the wrong output section (%s)\n"),
8827 input_bfd,
8828 sym_name,
8829 howto->name,
8830 name);
8831 }
8832 }
8833 break;
8834
8835 case R_PPC_VLE_LO16A:
8836 relocation = relocation + addend;
8837 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8838 relocation, split16a_type);
8839 continue;
8840
8841 case R_PPC_VLE_LO16D:
8842 relocation = relocation + addend;
8843 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8844 relocation, split16d_type);
8845 continue;
8846
8847 case R_PPC_VLE_HI16A:
8848 relocation = (relocation + addend) >> 16;
8849 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8850 relocation, split16a_type);
8851 continue;
8852
8853 case R_PPC_VLE_HI16D:
8854 relocation = (relocation + addend) >> 16;
8855 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8856 relocation, split16d_type);
8857 continue;
8858
8859 case R_PPC_VLE_HA16A:
8860 relocation = (relocation + addend + 0x8000) >> 16;
8861 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8862 relocation, split16a_type);
8863 continue;
8864
8865 case R_PPC_VLE_HA16D:
8866 relocation = (relocation + addend + 0x8000) >> 16;
8867 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8868 relocation, split16d_type);
8869 continue;
8870
8871 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8872 case R_PPC_EMB_SDA21:
8873 case R_PPC_VLE_SDA21:
8874 case R_PPC_EMB_RELSDA:
8875 case R_PPC_VLE_SDA21_LO:
8876 {
8877 const char *name;
8878 int reg;
8879 unsigned int insn;
8880 struct elf_link_hash_entry *sda = NULL;
8881
8882 if (sec == NULL || sec->output_section == NULL)
8883 {
8884 unresolved_reloc = TRUE;
8885 break;
8886 }
8887
8888 name = bfd_get_section_name (output_bfd, sec->output_section);
8889 if (strcmp (name, ".sdata") == 0
8890 || strcmp (name, ".sbss") == 0)
8891 {
8892 reg = 13;
8893 sda = htab->sdata[0].sym;
8894 }
8895 else if (strcmp (name, ".sdata2") == 0
8896 || strcmp (name, ".sbss2") == 0)
8897 {
8898 reg = 2;
8899 sda = htab->sdata[1].sym;
8900 }
8901 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8902 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8903 {
8904 reg = 0;
8905 }
8906 else
8907 {
8908 info->callbacks->einfo
8909 (_("%P: %B: the target (%s) of a %s relocation is "
8910 "in the wrong output section (%s)\n"),
8911 input_bfd,
8912 sym_name,
8913 howto->name,
8914 name);
8915
8916 bfd_set_error (bfd_error_bad_value);
8917 ret = FALSE;
8918 continue;
8919 }
8920
8921 if (sda != NULL)
8922 {
8923 if (!is_static_defined (sda))
8924 {
8925 unresolved_reloc = TRUE;
8926 break;
8927 }
8928 addend -= SYM_VAL (sda);
8929 }
8930
8931 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8932 if (reg == 0
8933 && (r_type == R_PPC_VLE_SDA21
8934 || r_type == R_PPC_VLE_SDA21_LO))
8935 {
8936 relocation = relocation + addend;
8937 addend = 0;
8938
8939 /* Force e_li insn, keeping RT from original insn. */
8940 insn &= 0x1f << 21;
8941 insn |= 28u << 26;
8942
8943 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8944 /* Top 4 bits of value to 17..20. */
8945 insn |= (relocation & 0xf0000) >> 5;
8946 /* Next 5 bits of the value to 11..15. */
8947 insn |= (relocation & 0xf800) << 5;
8948 /* And the final 11 bits of the value to bits 21 to 31. */
8949 insn |= relocation & 0x7ff;
8950
8951 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8952
8953 if (r_type == R_PPC_VLE_SDA21
8954 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8955 goto overflow;
8956 continue;
8957 }
8958 else if (r_type == R_PPC_EMB_SDA21
8959 || r_type == R_PPC_VLE_SDA21
8960 || r_type == R_PPC_VLE_SDA21_LO)
8961 {
8962 /* Fill in register field. */
8963 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8964 }
8965 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8966 }
8967 break;
8968
8969 case R_PPC_VLE_SDAREL_LO16A:
8970 case R_PPC_VLE_SDAREL_LO16D:
8971 case R_PPC_VLE_SDAREL_HI16A:
8972 case R_PPC_VLE_SDAREL_HI16D:
8973 case R_PPC_VLE_SDAREL_HA16A:
8974 case R_PPC_VLE_SDAREL_HA16D:
8975 {
8976 bfd_vma value;
8977 const char *name;
8978 //int reg;
8979 struct elf_link_hash_entry *sda = NULL;
8980
8981 if (sec == NULL || sec->output_section == NULL)
8982 {
8983 unresolved_reloc = TRUE;
8984 break;
8985 }
8986
8987 name = bfd_get_section_name (output_bfd, sec->output_section);
8988 if (strcmp (name, ".sdata") == 0
8989 || strcmp (name, ".sbss") == 0)
8990 {
8991 //reg = 13;
8992 sda = htab->sdata[0].sym;
8993 }
8994 else if (strcmp (name, ".sdata2") == 0
8995 || strcmp (name, ".sbss2") == 0)
8996 {
8997 //reg = 2;
8998 sda = htab->sdata[1].sym;
8999 }
9000 else
9001 {
9002 (*_bfd_error_handler)
9003 (_("%B: the target (%s) of a %s relocation is "
9004 "in the wrong output section (%s)"),
9005 input_bfd,
9006 sym_name,
9007 howto->name,
9008 name);
9009
9010 bfd_set_error (bfd_error_bad_value);
9011 ret = FALSE;
9012 continue;
9013 }
9014
9015 if (sda != NULL)
9016 {
9017 if (!is_static_defined (sda))
9018 {
9019 unresolved_reloc = TRUE;
9020 break;
9021 }
9022 }
9023
9024 value = (sda->root.u.def.section->output_section->vma
9025 + sda->root.u.def.section->output_offset
9026 + addend);
9027
9028 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9029 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9030 value, split16a_type);
9031 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9032 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9033 value, split16d_type);
9034 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9035 {
9036 value = value >> 16;
9037 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9038 value, split16a_type);
9039 }
9040 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9041 {
9042 value = value >> 16;
9043 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9044 value, split16d_type);
9045 }
9046 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9047 {
9048 value = (value + 0x8000) >> 16;
9049 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9050 value, split16a_type);
9051 }
9052 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9053 {
9054 value = (value + 0x8000) >> 16;
9055 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9056 value, split16d_type);
9057 }
9058 }
9059 continue;
9060
9061 /* Relocate against the beginning of the section. */
9062 case R_PPC_SECTOFF:
9063 case R_PPC_SECTOFF_LO:
9064 case R_PPC_SECTOFF_HI:
9065 case R_PPC_SECTOFF_HA:
9066 if (sec == NULL || sec->output_section == NULL)
9067 {
9068 unresolved_reloc = TRUE;
9069 break;
9070 }
9071 addend -= sec->output_section->vma;
9072 break;
9073
9074 /* Negative relocations. */
9075 case R_PPC_EMB_NADDR32:
9076 case R_PPC_EMB_NADDR16:
9077 case R_PPC_EMB_NADDR16_LO:
9078 case R_PPC_EMB_NADDR16_HI:
9079 case R_PPC_EMB_NADDR16_HA:
9080 addend -= 2 * relocation;
9081 break;
9082
9083 case R_PPC_COPY:
9084 case R_PPC_GLOB_DAT:
9085 case R_PPC_JMP_SLOT:
9086 case R_PPC_RELATIVE:
9087 case R_PPC_IRELATIVE:
9088 case R_PPC_PLT32:
9089 case R_PPC_PLTREL32:
9090 case R_PPC_PLT16_LO:
9091 case R_PPC_PLT16_HI:
9092 case R_PPC_PLT16_HA:
9093 case R_PPC_ADDR30:
9094 case R_PPC_EMB_RELSEC16:
9095 case R_PPC_EMB_RELST_LO:
9096 case R_PPC_EMB_RELST_HI:
9097 case R_PPC_EMB_RELST_HA:
9098 case R_PPC_EMB_BIT_FLD:
9099 info->callbacks->einfo
9100 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9101 input_bfd,
9102 howto->name,
9103 sym_name);
9104
9105 bfd_set_error (bfd_error_invalid_operation);
9106 ret = FALSE;
9107 continue;
9108 }
9109
9110 /* Do any further special processing. */
9111 switch (r_type)
9112 {
9113 default:
9114 break;
9115
9116 case R_PPC_ADDR16_HA:
9117 case R_PPC_REL16_HA:
9118 case R_PPC_SECTOFF_HA:
9119 case R_PPC_TPREL16_HA:
9120 case R_PPC_DTPREL16_HA:
9121 case R_PPC_EMB_NADDR16_HA:
9122 case R_PPC_EMB_RELST_HA:
9123 /* It's just possible that this symbol is a weak symbol
9124 that's not actually defined anywhere. In that case,
9125 'sec' would be NULL, and we should leave the symbol
9126 alone (it will be set to zero elsewhere in the link). */
9127 if (sec == NULL)
9128 break;
9129 /* Fall thru */
9130
9131 case R_PPC_PLT16_HA:
9132 case R_PPC_GOT16_HA:
9133 case R_PPC_GOT_TLSGD16_HA:
9134 case R_PPC_GOT_TLSLD16_HA:
9135 case R_PPC_GOT_TPREL16_HA:
9136 case R_PPC_GOT_DTPREL16_HA:
9137 /* Add 0x10000 if sign bit in 0:15 is set.
9138 Bits 0:15 are not used. */
9139 addend += 0x8000;
9140 break;
9141
9142 case R_PPC_ADDR16:
9143 case R_PPC_ADDR16_LO:
9144 case R_PPC_GOT16:
9145 case R_PPC_GOT16_LO:
9146 case R_PPC_SDAREL16:
9147 case R_PPC_SECTOFF:
9148 case R_PPC_SECTOFF_LO:
9149 case R_PPC_DTPREL16:
9150 case R_PPC_DTPREL16_LO:
9151 case R_PPC_TPREL16:
9152 case R_PPC_TPREL16_LO:
9153 case R_PPC_GOT_TLSGD16:
9154 case R_PPC_GOT_TLSGD16_LO:
9155 case R_PPC_GOT_TLSLD16:
9156 case R_PPC_GOT_TLSLD16_LO:
9157 case R_PPC_GOT_DTPREL16:
9158 case R_PPC_GOT_DTPREL16_LO:
9159 case R_PPC_GOT_TPREL16:
9160 case R_PPC_GOT_TPREL16_LO:
9161 {
9162 /* The 32-bit ABI lacks proper relocations to deal with
9163 certain 64-bit instructions. Prevent damage to bits
9164 that make up part of the insn opcode. */
9165 unsigned int insn, mask, lobit;
9166
9167 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9168 mask = 0;
9169 if (is_insn_ds_form (insn))
9170 mask = 3;
9171 else if (is_insn_dq_form (insn))
9172 mask = 15;
9173 else
9174 break;
9175 lobit = mask & (relocation + addend);
9176 if (lobit != 0)
9177 {
9178 addend -= lobit;
9179 info->callbacks->einfo
9180 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9181 input_bfd, input_section, rel->r_offset,
9182 howto->name, sym_name, mask + 1);
9183 bfd_set_error (bfd_error_bad_value);
9184 ret = FALSE;
9185 }
9186 addend += insn & mask;
9187 }
9188 break;
9189 }
9190
9191 #ifdef DEBUG
9192 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9193 "offset = %ld, addend = %ld\n",
9194 howto->name,
9195 (int) r_type,
9196 sym_name,
9197 r_symndx,
9198 (long) rel->r_offset,
9199 (long) addend);
9200 #endif
9201
9202 if (unresolved_reloc
9203 && !((input_section->flags & SEC_DEBUGGING) != 0
9204 && h->def_dynamic)
9205 && _bfd_elf_section_offset (output_bfd, info, input_section,
9206 rel->r_offset) != (bfd_vma) -1)
9207 {
9208 info->callbacks->einfo
9209 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9210 input_bfd, input_section, rel->r_offset,
9211 howto->name,
9212 sym_name);
9213 ret = FALSE;
9214 }
9215
9216 /* 16-bit fields in insns mostly have signed values, but a
9217 few insns have 16-bit unsigned values. Really, we should
9218 have different reloc types. */
9219 if (howto->complain_on_overflow != complain_overflow_dont
9220 && howto->dst_mask == 0xffff
9221 && (input_section->flags & SEC_CODE) != 0)
9222 {
9223 enum complain_overflow complain = complain_overflow_signed;
9224
9225 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9226 {
9227 unsigned int insn;
9228
9229 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9230 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9231 complain = complain_overflow_bitfield;
9232 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9233 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9234 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9235 complain = complain_overflow_unsigned;
9236 }
9237 if (howto->complain_on_overflow != complain)
9238 {
9239 alt_howto = *howto;
9240 alt_howto.complain_on_overflow = complain;
9241 howto = &alt_howto;
9242 }
9243 }
9244
9245 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9246 rel->r_offset, relocation, addend);
9247
9248 if (r != bfd_reloc_ok)
9249 {
9250 if (r == bfd_reloc_overflow)
9251 {
9252 overflow:
9253 if (warned)
9254 continue;
9255 if (h != NULL
9256 && h->root.type == bfd_link_hash_undefweak
9257 && howto->pc_relative)
9258 {
9259 /* Assume this is a call protected by other code that
9260 detect the symbol is undefined. If this is the case,
9261 we can safely ignore the overflow. If not, the
9262 program is hosed anyway, and a little warning isn't
9263 going to help. */
9264
9265 continue;
9266 }
9267
9268 if (! (*info->callbacks->reloc_overflow) (info,
9269 (h ? &h->root : NULL),
9270 sym_name,
9271 howto->name,
9272 rel->r_addend,
9273 input_bfd,
9274 input_section,
9275 rel->r_offset))
9276 return FALSE;
9277 }
9278 else
9279 {
9280 info->callbacks->einfo
9281 (_("%P: %H: %s reloc against `%s': error %d\n"),
9282 input_bfd, input_section, rel->r_offset,
9283 howto->name, sym_name, (int) r);
9284 ret = FALSE;
9285 }
9286 }
9287 }
9288
9289 #ifdef DEBUG
9290 fprintf (stderr, "\n");
9291 #endif
9292
9293 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9294 && input_section->size != input_section->rawsize
9295 && (strcmp (input_section->output_section->name, ".init") == 0
9296 || strcmp (input_section->output_section->name, ".fini") == 0))
9297 {
9298 /* Branch around the trampolines. */
9299 unsigned int insn = B + input_section->size - input_section->rawsize;
9300 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9301 }
9302
9303 if (htab->params->ppc476_workaround
9304 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9305 && (!info->relocatable
9306 || (input_section->output_section->alignment_power
9307 >= htab->params->pagesize_p2)))
9308 {
9309 struct ppc_elf_relax_info *relax_info;
9310 bfd_vma start_addr, end_addr, addr;
9311 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9312
9313 relax_info = elf_section_data (input_section)->sec_info;
9314 if (relax_info->workaround_size != 0)
9315 {
9316 bfd_byte *p;
9317 unsigned int n;
9318 bfd_byte fill[4];
9319
9320 bfd_put_32 (input_bfd, BA, fill);
9321 p = contents + input_section->size - relax_info->workaround_size;
9322 n = relax_info->workaround_size >> 2;
9323 while (n--)
9324 {
9325 memcpy (p, fill, 4);
9326 p += 4;
9327 }
9328 }
9329
9330 /* The idea is: Replace the last instruction on a page with a
9331 branch to a patch area. Put the insn there followed by a
9332 branch back to the next page. Complicated a little by
9333 needing to handle moved conditional branches, and by not
9334 wanting to touch data-in-text. */
9335
9336 start_addr = (input_section->output_section->vma
9337 + input_section->output_offset);
9338 end_addr = (start_addr + input_section->size
9339 - relax_info->workaround_size);
9340 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9341 addr < end_addr;
9342 addr += pagesize)
9343 {
9344 bfd_vma offset = addr - start_addr;
9345 Elf_Internal_Rela *lo, *hi;
9346 bfd_boolean is_data;
9347 bfd_vma patch_off, patch_addr;
9348 unsigned int insn;
9349
9350 /* Do we have a data reloc at this offset? If so, leave
9351 the word alone. */
9352 is_data = FALSE;
9353 lo = relocs;
9354 hi = relend;
9355 rel = NULL;
9356 while (lo < hi)
9357 {
9358 rel = lo + (hi - lo) / 2;
9359 if (rel->r_offset < offset)
9360 lo = rel + 1;
9361 else if (rel->r_offset > offset + 3)
9362 hi = rel;
9363 else
9364 {
9365 switch (ELF32_R_TYPE (rel->r_info))
9366 {
9367 case R_PPC_ADDR32:
9368 case R_PPC_UADDR32:
9369 case R_PPC_REL32:
9370 case R_PPC_ADDR30:
9371 is_data = TRUE;
9372 break;
9373 default:
9374 break;
9375 }
9376 break;
9377 }
9378 }
9379 if (is_data)
9380 continue;
9381
9382 /* Some instructions can be left alone too. Unconditional
9383 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9384 avoid the icache failure.
9385
9386 The problem occurs due to prefetch across a page boundary
9387 where stale instructions can be fetched from the next
9388 page, and the mechanism for flushing these bad
9389 instructions fails under certain circumstances. The
9390 unconditional branches:
9391 1) Branch: b, bl, ba, bla,
9392 2) Branch Conditional: bc, bca, bcl, bcla,
9393 3) Branch Conditional to Link Register: bclr, bclrl,
9394 where (2) and (3) have BO=0x14 making them unconditional,
9395 prevent the bad prefetch because the prefetch itself is
9396 affected by these instructions. This happens even if the
9397 instruction is not executed.
9398
9399 A bctr example:
9400 .
9401 . lis 9,new_page@ha
9402 . addi 9,9,new_page@l
9403 . mtctr 9
9404 . bctr
9405 . nop
9406 . nop
9407 . new_page:
9408 .
9409 The bctr is not predicted taken due to ctr not being
9410 ready, so prefetch continues on past the bctr into the
9411 new page which might have stale instructions. If they
9412 fail to be flushed, then they will be executed after the
9413 bctr executes. Either of the following modifications
9414 prevent the bad prefetch from happening in the first
9415 place:
9416 .
9417 . lis 9,new_page@ha lis 9,new_page@ha
9418 . addi 9,9,new_page@l addi 9,9,new_page@l
9419 . mtctr 9 mtctr 9
9420 . bctr bctr
9421 . nop b somewhere_else
9422 . b somewhere_else nop
9423 . new_page: new_page:
9424 . */
9425 insn = bfd_get_32 (input_bfd, contents + offset);
9426 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9427 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9428 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9429 || ((insn & (0x3f << 26)) == (19u << 26)
9430 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9431 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9432 continue;
9433
9434 patch_addr = (start_addr + input_section->size
9435 - relax_info->workaround_size);
9436 patch_addr = (patch_addr + 15) & -16;
9437 patch_off = patch_addr - start_addr;
9438 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9439
9440 if (rel != NULL
9441 && rel->r_offset >= offset
9442 && rel->r_offset < offset + 4)
9443 {
9444 /* If the insn we are patching had a reloc, adjust the
9445 reloc r_offset so that the reloc applies to the moved
9446 location. This matters for -r and --emit-relocs. */
9447 if (rel + 1 != relend)
9448 {
9449 Elf_Internal_Rela tmp = *rel;
9450
9451 /* Keep the relocs sorted by r_offset. */
9452 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9453 relend[-1] = tmp;
9454 }
9455 relend[-1].r_offset += patch_off - offset;
9456 }
9457 else
9458 rel = NULL;
9459
9460 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9461 && (insn & 2) == 0 /* relative */)
9462 {
9463 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9464
9465 delta += offset - patch_off;
9466 if (info->relocatable && rel != NULL)
9467 delta = 0;
9468 if (!info->relocatable && rel != NULL)
9469 {
9470 enum elf_ppc_reloc_type r_type;
9471
9472 r_type = ELF32_R_TYPE (relend[-1].r_info);
9473 if (r_type == R_PPC_REL14_BRTAKEN)
9474 insn |= BRANCH_PREDICT_BIT;
9475 else if (r_type == R_PPC_REL14_BRNTAKEN)
9476 insn &= ~BRANCH_PREDICT_BIT;
9477 else
9478 BFD_ASSERT (r_type == R_PPC_REL14);
9479
9480 if ((r_type == R_PPC_REL14_BRTAKEN
9481 || r_type == R_PPC_REL14_BRNTAKEN)
9482 && delta + 0x8000 < 0x10000
9483 && (bfd_signed_vma) delta < 0)
9484 insn ^= BRANCH_PREDICT_BIT;
9485 }
9486 if (delta + 0x8000 < 0x10000)
9487 {
9488 bfd_put_32 (input_bfd,
9489 (insn & ~0xfffc) | (delta & 0xfffc),
9490 contents + patch_off);
9491 patch_off += 4;
9492 bfd_put_32 (input_bfd,
9493 B | ((offset + 4 - patch_off) & 0x3fffffc),
9494 contents + patch_off);
9495 patch_off += 4;
9496 }
9497 else
9498 {
9499 if (rel != NULL)
9500 {
9501 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9502
9503 relend[-1].r_offset += 8;
9504 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9505 }
9506 bfd_put_32 (input_bfd,
9507 (insn & ~0xfffc) | 8,
9508 contents + patch_off);
9509 patch_off += 4;
9510 bfd_put_32 (input_bfd,
9511 B | ((offset + 4 - patch_off) & 0x3fffffc),
9512 contents + patch_off);
9513 patch_off += 4;
9514 bfd_put_32 (input_bfd,
9515 B | ((delta - 8) & 0x3fffffc),
9516 contents + patch_off);
9517 patch_off += 4;
9518 }
9519 }
9520 else
9521 {
9522 bfd_put_32 (input_bfd, insn, contents + patch_off);
9523 patch_off += 4;
9524 bfd_put_32 (input_bfd,
9525 B | ((offset + 4 - patch_off) & 0x3fffffc),
9526 contents + patch_off);
9527 patch_off += 4;
9528 }
9529 BFD_ASSERT (patch_off <= input_section->size);
9530 relax_info->workaround_size = input_section->size - patch_off;
9531 }
9532 }
9533
9534 return ret;
9535 }
9536 \f
9537 /* Finish up dynamic symbol handling. We set the contents of various
9538 dynamic sections here. */
9539
9540 static bfd_boolean
9541 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9542 struct bfd_link_info *info,
9543 struct elf_link_hash_entry *h,
9544 Elf_Internal_Sym *sym)
9545 {
9546 struct ppc_elf_link_hash_table *htab;
9547 struct plt_entry *ent;
9548 bfd_boolean doneone;
9549
9550 #ifdef DEBUG
9551 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9552 h->root.root.string);
9553 #endif
9554
9555 htab = ppc_elf_hash_table (info);
9556 BFD_ASSERT (htab->elf.dynobj != NULL);
9557
9558 doneone = FALSE;
9559 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9560 if (ent->plt.offset != (bfd_vma) -1)
9561 {
9562 if (!doneone)
9563 {
9564 Elf_Internal_Rela rela;
9565 bfd_byte *loc;
9566 bfd_vma reloc_index;
9567
9568 if (htab->plt_type == PLT_NEW
9569 || !htab->elf.dynamic_sections_created
9570 || h->dynindx == -1)
9571 reloc_index = ent->plt.offset / 4;
9572 else
9573 {
9574 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9575 / htab->plt_slot_size);
9576 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9577 && htab->plt_type == PLT_OLD)
9578 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9579 }
9580
9581 /* This symbol has an entry in the procedure linkage table.
9582 Set it up. */
9583 if (htab->plt_type == PLT_VXWORKS
9584 && htab->elf.dynamic_sections_created
9585 && h->dynindx != -1)
9586 {
9587 bfd_vma got_offset;
9588 const bfd_vma *plt_entry;
9589
9590 /* The first three entries in .got.plt are reserved. */
9591 got_offset = (reloc_index + 3) * 4;
9592
9593 /* Use the right PLT. */
9594 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9595 : ppc_elf_vxworks_plt_entry;
9596
9597 /* Fill in the .plt on VxWorks. */
9598 if (info->shared)
9599 {
9600 bfd_put_32 (output_bfd,
9601 plt_entry[0] | PPC_HA (got_offset),
9602 htab->plt->contents + ent->plt.offset + 0);
9603 bfd_put_32 (output_bfd,
9604 plt_entry[1] | PPC_LO (got_offset),
9605 htab->plt->contents + ent->plt.offset + 4);
9606 }
9607 else
9608 {
9609 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9610
9611 bfd_put_32 (output_bfd,
9612 plt_entry[0] | PPC_HA (got_loc),
9613 htab->plt->contents + ent->plt.offset + 0);
9614 bfd_put_32 (output_bfd,
9615 plt_entry[1] | PPC_LO (got_loc),
9616 htab->plt->contents + ent->plt.offset + 4);
9617 }
9618
9619 bfd_put_32 (output_bfd, plt_entry[2],
9620 htab->plt->contents + ent->plt.offset + 8);
9621 bfd_put_32 (output_bfd, plt_entry[3],
9622 htab->plt->contents + ent->plt.offset + 12);
9623
9624 /* This instruction is an immediate load. The value loaded is
9625 the byte offset of the R_PPC_JMP_SLOT relocation from the
9626 start of the .rela.plt section. The value is stored in the
9627 low-order 16 bits of the load instruction. */
9628 /* NOTE: It appears that this is now an index rather than a
9629 prescaled offset. */
9630 bfd_put_32 (output_bfd,
9631 plt_entry[4] | reloc_index,
9632 htab->plt->contents + ent->plt.offset + 16);
9633 /* This instruction is a PC-relative branch whose target is
9634 the start of the PLT section. The address of this branch
9635 instruction is 20 bytes beyond the start of this PLT entry.
9636 The address is encoded in bits 6-29, inclusive. The value
9637 stored is right-shifted by two bits, permitting a 26-bit
9638 offset. */
9639 bfd_put_32 (output_bfd,
9640 (plt_entry[5]
9641 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9642 htab->plt->contents + ent->plt.offset + 20);
9643 bfd_put_32 (output_bfd, plt_entry[6],
9644 htab->plt->contents + ent->plt.offset + 24);
9645 bfd_put_32 (output_bfd, plt_entry[7],
9646 htab->plt->contents + ent->plt.offset + 28);
9647
9648 /* Fill in the GOT entry corresponding to this PLT slot with
9649 the address immediately after the "bctr" instruction
9650 in this PLT entry. */
9651 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9652 + htab->plt->output_offset
9653 + ent->plt.offset + 16),
9654 htab->sgotplt->contents + got_offset);
9655
9656 if (!info->shared)
9657 {
9658 /* Fill in a couple of entries in .rela.plt.unloaded. */
9659 loc = htab->srelplt2->contents
9660 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9661 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9662 * sizeof (Elf32_External_Rela));
9663
9664 /* Provide the @ha relocation for the first instruction. */
9665 rela.r_offset = (htab->plt->output_section->vma
9666 + htab->plt->output_offset
9667 + ent->plt.offset + 2);
9668 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9669 R_PPC_ADDR16_HA);
9670 rela.r_addend = got_offset;
9671 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9672 loc += sizeof (Elf32_External_Rela);
9673
9674 /* Provide the @l relocation for the second instruction. */
9675 rela.r_offset = (htab->plt->output_section->vma
9676 + htab->plt->output_offset
9677 + ent->plt.offset + 6);
9678 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9679 R_PPC_ADDR16_LO);
9680 rela.r_addend = got_offset;
9681 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9682 loc += sizeof (Elf32_External_Rela);
9683
9684 /* Provide a relocation for the GOT entry corresponding to this
9685 PLT slot. Point it at the middle of the .plt entry. */
9686 rela.r_offset = (htab->sgotplt->output_section->vma
9687 + htab->sgotplt->output_offset
9688 + got_offset);
9689 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9690 R_PPC_ADDR32);
9691 rela.r_addend = ent->plt.offset + 16;
9692 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9693 }
9694
9695 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9696 In particular, the offset for the relocation is not the
9697 address of the PLT entry for this function, as specified
9698 by the ABI. Instead, the offset is set to the address of
9699 the GOT slot for this function. See EABI 4.4.4.1. */
9700 rela.r_offset = (htab->sgotplt->output_section->vma
9701 + htab->sgotplt->output_offset
9702 + got_offset);
9703
9704 }
9705 else
9706 {
9707 asection *splt = htab->plt;
9708 if (!htab->elf.dynamic_sections_created
9709 || h->dynindx == -1)
9710 splt = htab->iplt;
9711
9712 rela.r_offset = (splt->output_section->vma
9713 + splt->output_offset
9714 + ent->plt.offset);
9715 if (htab->plt_type == PLT_OLD
9716 || !htab->elf.dynamic_sections_created
9717 || h->dynindx == -1)
9718 {
9719 /* We don't need to fill in the .plt. The ppc dynamic
9720 linker will fill it in. */
9721 }
9722 else
9723 {
9724 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9725 + htab->glink->output_section->vma
9726 + htab->glink->output_offset);
9727 bfd_put_32 (output_bfd, val,
9728 splt->contents + ent->plt.offset);
9729 }
9730 }
9731
9732 /* Fill in the entry in the .rela.plt section. */
9733 rela.r_addend = 0;
9734 if (!htab->elf.dynamic_sections_created
9735 || h->dynindx == -1)
9736 {
9737 BFD_ASSERT (h->type == STT_GNU_IFUNC
9738 && h->def_regular
9739 && (h->root.type == bfd_link_hash_defined
9740 || h->root.type == bfd_link_hash_defweak));
9741 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9742 rela.r_addend = SYM_VAL (h);
9743 }
9744 else
9745 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9746
9747 if (!htab->elf.dynamic_sections_created
9748 || h->dynindx == -1)
9749 loc = (htab->reliplt->contents
9750 + (htab->reliplt->reloc_count++
9751 * sizeof (Elf32_External_Rela)));
9752 else
9753 loc = (htab->relplt->contents
9754 + reloc_index * sizeof (Elf32_External_Rela));
9755 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9756
9757 if (!h->def_regular)
9758 {
9759 /* Mark the symbol as undefined, rather than as
9760 defined in the .plt section. Leave the value if
9761 there were any relocations where pointer equality
9762 matters (this is a clue for the dynamic linker, to
9763 make function pointer comparisons work between an
9764 application and shared library), otherwise set it
9765 to zero. */
9766 sym->st_shndx = SHN_UNDEF;
9767 if (!h->pointer_equality_needed)
9768 sym->st_value = 0;
9769 else if (!h->ref_regular_nonweak)
9770 {
9771 /* This breaks function pointer comparisons, but
9772 that is better than breaking tests for a NULL
9773 function pointer. */
9774 sym->st_value = 0;
9775 }
9776 }
9777 else if (h->type == STT_GNU_IFUNC
9778 && !info->shared)
9779 {
9780 /* Set the value of ifunc symbols in a non-pie
9781 executable to the glink entry. This is to avoid
9782 text relocations. We can't do this for ifunc in
9783 allocate_dynrelocs, as we do for normal dynamic
9784 function symbols with plt entries, because we need
9785 to keep the original value around for the ifunc
9786 relocation. */
9787 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9788 (output_bfd, htab->glink->output_section));
9789 sym->st_value = (ent->glink_offset
9790 + htab->glink->output_offset
9791 + htab->glink->output_section->vma);
9792 }
9793 doneone = TRUE;
9794 }
9795
9796 if (htab->plt_type == PLT_NEW
9797 || !htab->elf.dynamic_sections_created
9798 || h->dynindx == -1)
9799 {
9800 unsigned char *p;
9801 asection *splt = htab->plt;
9802 if (!htab->elf.dynamic_sections_created
9803 || h->dynindx == -1)
9804 splt = htab->iplt;
9805
9806 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9807
9808 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9809 {
9810 bfd_put_32 (output_bfd, LWZ_11_3, p);
9811 p += 4;
9812 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9813 p += 4;
9814 bfd_put_32 (output_bfd, MR_0_3, p);
9815 p += 4;
9816 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9817 p += 4;
9818 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9819 p += 4;
9820 bfd_put_32 (output_bfd, BEQLR, p);
9821 p += 4;
9822 bfd_put_32 (output_bfd, MR_3_0, p);
9823 p += 4;
9824 bfd_put_32 (output_bfd, NOP, p);
9825 p += 4;
9826 }
9827
9828 write_glink_stub (ent, splt, p, info);
9829
9830 if (!info->shared)
9831 /* We only need one non-PIC glink stub. */
9832 break;
9833 }
9834 else
9835 break;
9836 }
9837
9838 if (h->needs_copy)
9839 {
9840 asection *s;
9841 Elf_Internal_Rela rela;
9842 bfd_byte *loc;
9843
9844 /* This symbols needs a copy reloc. Set it up. */
9845
9846 #ifdef DEBUG
9847 fprintf (stderr, ", copy");
9848 #endif
9849
9850 BFD_ASSERT (h->dynindx != -1);
9851
9852 if (ppc_elf_hash_entry (h)->has_sda_refs)
9853 s = htab->relsbss;
9854 else
9855 s = htab->relbss;
9856 BFD_ASSERT (s != NULL);
9857
9858 rela.r_offset = SYM_VAL (h);
9859 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9860 rela.r_addend = 0;
9861 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9862 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9863 }
9864
9865 #ifdef DEBUG
9866 fprintf (stderr, "\n");
9867 #endif
9868
9869 return TRUE;
9870 }
9871 \f
9872 static enum elf_reloc_type_class
9873 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9874 const asection *rel_sec,
9875 const Elf_Internal_Rela *rela)
9876 {
9877 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9878
9879 if (rel_sec == htab->reliplt)
9880 return reloc_class_ifunc;
9881
9882 switch (ELF32_R_TYPE (rela->r_info))
9883 {
9884 case R_PPC_RELATIVE:
9885 return reloc_class_relative;
9886 case R_PPC_JMP_SLOT:
9887 return reloc_class_plt;
9888 case R_PPC_COPY:
9889 return reloc_class_copy;
9890 default:
9891 return reloc_class_normal;
9892 }
9893 }
9894 \f
9895 /* Finish up the dynamic sections. */
9896
9897 static bfd_boolean
9898 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9899 struct bfd_link_info *info)
9900 {
9901 asection *sdyn;
9902 asection *splt;
9903 struct ppc_elf_link_hash_table *htab;
9904 bfd_vma got;
9905 bfd *dynobj;
9906 bfd_boolean ret = TRUE;
9907
9908 #ifdef DEBUG
9909 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9910 #endif
9911
9912 htab = ppc_elf_hash_table (info);
9913 dynobj = elf_hash_table (info)->dynobj;
9914 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9915 if (htab->is_vxworks)
9916 splt = bfd_get_linker_section (dynobj, ".plt");
9917 else
9918 splt = NULL;
9919
9920 got = 0;
9921 if (htab->elf.hgot != NULL)
9922 got = SYM_VAL (htab->elf.hgot);
9923
9924 if (htab->elf.dynamic_sections_created)
9925 {
9926 Elf32_External_Dyn *dyncon, *dynconend;
9927
9928 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9929
9930 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9931 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9932 for (; dyncon < dynconend; dyncon++)
9933 {
9934 Elf_Internal_Dyn dyn;
9935 asection *s;
9936
9937 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9938
9939 switch (dyn.d_tag)
9940 {
9941 case DT_PLTGOT:
9942 if (htab->is_vxworks)
9943 s = htab->sgotplt;
9944 else
9945 s = htab->plt;
9946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9947 break;
9948
9949 case DT_PLTRELSZ:
9950 dyn.d_un.d_val = htab->relplt->size;
9951 break;
9952
9953 case DT_JMPREL:
9954 s = htab->relplt;
9955 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9956 break;
9957
9958 case DT_PPC_GOT:
9959 dyn.d_un.d_ptr = got;
9960 break;
9961
9962 case DT_RELASZ:
9963 if (htab->is_vxworks)
9964 {
9965 if (htab->relplt)
9966 dyn.d_un.d_ptr -= htab->relplt->size;
9967 break;
9968 }
9969 continue;
9970
9971 default:
9972 if (htab->is_vxworks
9973 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9974 break;
9975 continue;
9976 }
9977
9978 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9979 }
9980 }
9981
9982 if (htab->got != NULL)
9983 {
9984 if (htab->elf.hgot->root.u.def.section == htab->got
9985 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9986 {
9987 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9988
9989 p += htab->elf.hgot->root.u.def.value;
9990 if (htab->plt_type == PLT_OLD)
9991 {
9992 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9993 so that a function can easily find the address of
9994 _GLOBAL_OFFSET_TABLE_. */
9995 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9996 < htab->elf.hgot->root.u.def.section->size);
9997 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9998 }
9999
10000 if (sdyn != NULL)
10001 {
10002 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10003 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10004 < htab->elf.hgot->root.u.def.section->size);
10005 bfd_put_32 (output_bfd, val, p);
10006 }
10007 }
10008 else
10009 {
10010 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10011 htab->elf.hgot->root.root.string,
10012 (htab->sgotplt != NULL
10013 ? htab->sgotplt->name : htab->got->name));
10014 bfd_set_error (bfd_error_bad_value);
10015 ret = FALSE;
10016 }
10017
10018 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10019 }
10020
10021 /* Fill in the first entry in the VxWorks procedure linkage table. */
10022 if (splt && splt->size > 0)
10023 {
10024 /* Use the right PLT. */
10025 const bfd_vma *plt_entry = (info->shared
10026 ? ppc_elf_vxworks_pic_plt0_entry
10027 : ppc_elf_vxworks_plt0_entry);
10028
10029 if (!info->shared)
10030 {
10031 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10032
10033 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10034 splt->contents + 0);
10035 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10036 splt->contents + 4);
10037 }
10038 else
10039 {
10040 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10041 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10042 }
10043 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10044 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10045 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10046 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10047 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10048 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10049
10050 if (! info->shared)
10051 {
10052 Elf_Internal_Rela rela;
10053 bfd_byte *loc;
10054
10055 loc = htab->srelplt2->contents;
10056
10057 /* Output the @ha relocation for the first instruction. */
10058 rela.r_offset = (htab->plt->output_section->vma
10059 + htab->plt->output_offset
10060 + 2);
10061 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10062 rela.r_addend = 0;
10063 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10064 loc += sizeof (Elf32_External_Rela);
10065
10066 /* Output the @l relocation for the second instruction. */
10067 rela.r_offset = (htab->plt->output_section->vma
10068 + htab->plt->output_offset
10069 + 6);
10070 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10071 rela.r_addend = 0;
10072 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10073 loc += sizeof (Elf32_External_Rela);
10074
10075 /* Fix up the remaining relocations. They may have the wrong
10076 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10077 in which symbols were output. */
10078 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10079 {
10080 Elf_Internal_Rela rel;
10081
10082 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10083 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10084 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10085 loc += sizeof (Elf32_External_Rela);
10086
10087 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10088 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10089 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10090 loc += sizeof (Elf32_External_Rela);
10091
10092 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10093 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10094 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10095 loc += sizeof (Elf32_External_Rela);
10096 }
10097 }
10098 }
10099
10100 if (htab->glink != NULL
10101 && htab->glink->contents != NULL
10102 && htab->elf.dynamic_sections_created)
10103 {
10104 unsigned char *p;
10105 unsigned char *endp;
10106 bfd_vma res0;
10107 unsigned int i;
10108
10109 /*
10110 * PIC glink code is the following:
10111 *
10112 * # ith PLT code stub.
10113 * addis 11,30,(plt+(i-1)*4-got)@ha
10114 * lwz 11,(plt+(i-1)*4-got)@l(11)
10115 * mtctr 11
10116 * bctr
10117 *
10118 * # A table of branches, one for each plt entry.
10119 * # The idea is that the plt call stub loads ctr and r11 with these
10120 * # addresses, so (r11 - res_0) gives the plt index * 4.
10121 * res_0: b PLTresolve
10122 * res_1: b PLTresolve
10123 * .
10124 * # Some number of entries towards the end can be nops
10125 * res_n_m3: nop
10126 * res_n_m2: nop
10127 * res_n_m1:
10128 *
10129 * PLTresolve:
10130 * addis 11,11,(1f-res_0)@ha
10131 * mflr 0
10132 * bcl 20,31,1f
10133 * 1: addi 11,11,(1b-res_0)@l
10134 * mflr 12
10135 * mtlr 0
10136 * sub 11,11,12 # r11 = index * 4
10137 * addis 12,12,(got+4-1b)@ha
10138 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10139 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10140 * mtctr 0
10141 * add 0,11,11
10142 * add 11,0,11 # r11 = index * 12 = reloc offset.
10143 * bctr
10144 */
10145 static const unsigned int pic_plt_resolve[] =
10146 {
10147 ADDIS_11_11,
10148 MFLR_0,
10149 BCL_20_31,
10150 ADDI_11_11,
10151 MFLR_12,
10152 MTLR_0,
10153 SUB_11_11_12,
10154 ADDIS_12_12,
10155 LWZ_0_12,
10156 LWZ_12_12,
10157 MTCTR_0,
10158 ADD_0_11_11,
10159 ADD_11_0_11,
10160 BCTR,
10161 NOP,
10162 NOP
10163 };
10164
10165 /*
10166 * Non-PIC glink code is a little simpler.
10167 *
10168 * # ith PLT code stub.
10169 * lis 11,(plt+(i-1)*4)@ha
10170 * lwz 11,(plt+(i-1)*4)@l(11)
10171 * mtctr 11
10172 * bctr
10173 *
10174 * The branch table is the same, then comes
10175 *
10176 * PLTresolve:
10177 * lis 12,(got+4)@ha
10178 * addis 11,11,(-res_0)@ha
10179 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10180 * addi 11,11,(-res_0)@l # r11 = index * 4
10181 * mtctr 0
10182 * add 0,11,11
10183 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10184 * add 11,0,11 # r11 = index * 12 = reloc offset.
10185 * bctr
10186 */
10187 static const unsigned int plt_resolve[] =
10188 {
10189 LIS_12,
10190 ADDIS_11_11,
10191 LWZ_0_12,
10192 ADDI_11_11,
10193 MTCTR_0,
10194 ADD_0_11_11,
10195 LWZ_12_12,
10196 ADD_11_0_11,
10197 BCTR,
10198 NOP,
10199 NOP,
10200 NOP,
10201 NOP,
10202 NOP,
10203 NOP,
10204 NOP
10205 };
10206
10207 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10208 abort ();
10209 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10210 abort ();
10211
10212 /* Build the branch table, one for each plt entry (less one),
10213 and perhaps some padding. */
10214 p = htab->glink->contents;
10215 p += htab->glink_pltresolve;
10216 endp = htab->glink->contents;
10217 endp += htab->glink->size - GLINK_PLTRESOLVE;
10218 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10219 {
10220 bfd_put_32 (output_bfd, B + endp - p, p);
10221 p += 4;
10222 }
10223 while (p < endp)
10224 {
10225 bfd_put_32 (output_bfd, NOP, p);
10226 p += 4;
10227 }
10228
10229 res0 = (htab->glink_pltresolve
10230 + htab->glink->output_section->vma
10231 + htab->glink->output_offset);
10232
10233 if (htab->params->ppc476_workaround)
10234 {
10235 /* Ensure that a call stub at the end of a page doesn't
10236 result in prefetch over the end of the page into the
10237 glink branch table. */
10238 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10239 bfd_vma page_addr;
10240 bfd_vma glink_start = (htab->glink->output_section->vma
10241 + htab->glink->output_offset);
10242
10243 for (page_addr = res0 & -pagesize;
10244 page_addr > glink_start;
10245 page_addr -= pagesize)
10246 {
10247 /* We have a plt call stub that may need fixing. */
10248 bfd_byte *loc;
10249 unsigned int insn;
10250
10251 loc = htab->glink->contents + page_addr - 4 - glink_start;
10252 insn = bfd_get_32 (output_bfd, loc);
10253 if (insn == BCTR)
10254 {
10255 /* By alignment, we know that there must be at least
10256 one other call stub before this one. */
10257 insn = bfd_get_32 (output_bfd, loc - 16);
10258 if (insn == BCTR)
10259 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10260 else
10261 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10262 }
10263 }
10264 }
10265
10266 /* Last comes the PLTresolve stub. */
10267 if (info->shared)
10268 {
10269 bfd_vma bcl;
10270
10271 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10272 {
10273 unsigned int insn = pic_plt_resolve[i];
10274
10275 if (htab->params->ppc476_workaround && insn == NOP)
10276 insn = BA + 0;
10277 bfd_put_32 (output_bfd, insn, p);
10278 p += 4;
10279 }
10280 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10281
10282 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10283 + htab->glink->output_section->vma
10284 + htab->glink->output_offset);
10285
10286 bfd_put_32 (output_bfd,
10287 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10288 bfd_put_32 (output_bfd,
10289 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10290 bfd_put_32 (output_bfd,
10291 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10292 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10293 {
10294 bfd_put_32 (output_bfd,
10295 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10296 bfd_put_32 (output_bfd,
10297 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10298 }
10299 else
10300 {
10301 bfd_put_32 (output_bfd,
10302 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10303 bfd_put_32 (output_bfd,
10304 LWZ_12_12 + 4, p + 9*4);
10305 }
10306 }
10307 else
10308 {
10309 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10310 {
10311 unsigned int insn = plt_resolve[i];
10312
10313 if (htab->params->ppc476_workaround && insn == NOP)
10314 insn = BA + 0;
10315 bfd_put_32 (output_bfd, insn, p);
10316 p += 4;
10317 }
10318 p -= 4 * ARRAY_SIZE (plt_resolve);
10319
10320 bfd_put_32 (output_bfd,
10321 LIS_12 + PPC_HA (got + 4), p + 0*4);
10322 bfd_put_32 (output_bfd,
10323 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10324 bfd_put_32 (output_bfd,
10325 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10326 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10327 {
10328 bfd_put_32 (output_bfd,
10329 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10330 bfd_put_32 (output_bfd,
10331 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10332 }
10333 else
10334 {
10335 bfd_put_32 (output_bfd,
10336 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10337 bfd_put_32 (output_bfd,
10338 LWZ_12_12 + 4, p + 6*4);
10339 }
10340 }
10341 }
10342
10343 if (htab->glink_eh_frame != NULL
10344 && htab->glink_eh_frame->contents != NULL)
10345 {
10346 unsigned char *p = htab->glink_eh_frame->contents;
10347 bfd_vma val;
10348
10349 p += sizeof (glink_eh_frame_cie);
10350 /* FDE length. */
10351 p += 4;
10352 /* CIE pointer. */
10353 p += 4;
10354 /* Offset to .glink. */
10355 val = (htab->glink->output_section->vma
10356 + htab->glink->output_offset);
10357 val -= (htab->glink_eh_frame->output_section->vma
10358 + htab->glink_eh_frame->output_offset);
10359 val -= p - htab->glink_eh_frame->contents;
10360 bfd_put_32 (htab->elf.dynobj, val, p);
10361
10362 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10363 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10364 htab->glink_eh_frame,
10365 htab->glink_eh_frame->contents))
10366 return FALSE;
10367 }
10368
10369 return ret;
10370 }
10371 \f
10372 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10373 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10374 #define TARGET_BIG_SYM powerpc_elf32_vec
10375 #define TARGET_BIG_NAME "elf32-powerpc"
10376 #define ELF_ARCH bfd_arch_powerpc
10377 #define ELF_TARGET_ID PPC32_ELF_DATA
10378 #define ELF_MACHINE_CODE EM_PPC
10379 #ifdef __QNXTARGET__
10380 #define ELF_MAXPAGESIZE 0x1000
10381 #define ELF_COMMONPAGESIZE 0x1000
10382 #else
10383 #define ELF_MAXPAGESIZE 0x10000
10384 #define ELF_COMMONPAGESIZE 0x10000
10385 #endif
10386 #define ELF_MINPAGESIZE 0x1000
10387 #define elf_info_to_howto ppc_elf_info_to_howto
10388
10389 #ifdef EM_CYGNUS_POWERPC
10390 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10391 #endif
10392
10393 #ifdef EM_PPC_OLD
10394 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10395 #endif
10396
10397 #define elf_backend_plt_not_loaded 1
10398 #define elf_backend_can_gc_sections 1
10399 #define elf_backend_can_refcount 1
10400 #define elf_backend_rela_normal 1
10401 #define elf_backend_caches_rawsize 1
10402
10403 #define bfd_elf32_mkobject ppc_elf_mkobject
10404 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10405 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10406 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10407 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10408 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10409 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10410 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10411
10412 #define elf_backend_object_p ppc_elf_object_p
10413 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10414 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10415 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10416 #define elf_backend_relocate_section ppc_elf_relocate_section
10417 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10418 #define elf_backend_check_relocs ppc_elf_check_relocs
10419 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10420 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10421 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10422 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10423 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10424 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10425 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10426 #define elf_backend_fake_sections ppc_elf_fake_sections
10427 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10428 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10429 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10430 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10431 #define elf_backend_write_core_note ppc_elf_write_core_note
10432 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10433 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10434 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10435 #define elf_backend_write_section ppc_elf_write_section
10436 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10437 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10438 #define elf_backend_action_discarded ppc_elf_action_discarded
10439 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10440 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10441 #define elf_backend_section_processing ppc_elf_section_processing
10442
10443 #include "elf32-target.h"
10444
10445 /* FreeBSD Target */
10446
10447 #undef TARGET_LITTLE_SYM
10448 #undef TARGET_LITTLE_NAME
10449
10450 #undef TARGET_BIG_SYM
10451 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10452 #undef TARGET_BIG_NAME
10453 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10454
10455 #undef ELF_OSABI
10456 #define ELF_OSABI ELFOSABI_FREEBSD
10457
10458 #undef elf32_bed
10459 #define elf32_bed elf32_powerpc_fbsd_bed
10460
10461 #include "elf32-target.h"
10462
10463 /* VxWorks Target */
10464
10465 #undef TARGET_LITTLE_SYM
10466 #undef TARGET_LITTLE_NAME
10467
10468 #undef TARGET_BIG_SYM
10469 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10470 #undef TARGET_BIG_NAME
10471 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10472
10473 #undef ELF_OSABI
10474
10475 /* VxWorks uses the elf default section flags for .plt. */
10476 static const struct bfd_elf_special_section *
10477 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10478 {
10479 if (sec->name == NULL)
10480 return NULL;
10481
10482 if (strcmp (sec->name, ".plt") == 0)
10483 return _bfd_elf_get_sec_type_attr (abfd, sec);
10484
10485 return ppc_elf_get_sec_type_attr (abfd, sec);
10486 }
10487
10488 /* Like ppc_elf_link_hash_table_create, but overrides
10489 appropriately for VxWorks. */
10490 static struct bfd_link_hash_table *
10491 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10492 {
10493 struct bfd_link_hash_table *ret;
10494
10495 ret = ppc_elf_link_hash_table_create (abfd);
10496 if (ret)
10497 {
10498 struct ppc_elf_link_hash_table *htab
10499 = (struct ppc_elf_link_hash_table *)ret;
10500 htab->is_vxworks = 1;
10501 htab->plt_type = PLT_VXWORKS;
10502 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10503 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10504 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10505 }
10506 return ret;
10507 }
10508
10509 /* Tweak magic VxWorks symbols as they are loaded. */
10510 static bfd_boolean
10511 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10512 struct bfd_link_info *info,
10513 Elf_Internal_Sym *sym,
10514 const char **namep ATTRIBUTE_UNUSED,
10515 flagword *flagsp ATTRIBUTE_UNUSED,
10516 asection **secp,
10517 bfd_vma *valp)
10518 {
10519 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10520 valp))
10521 return FALSE;
10522
10523 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10524 }
10525
10526 static void
10527 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10528 {
10529 ppc_elf_final_write_processing(abfd, linker);
10530 elf_vxworks_final_write_processing(abfd, linker);
10531 }
10532
10533 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10534 define it. */
10535 #undef elf_backend_want_plt_sym
10536 #define elf_backend_want_plt_sym 1
10537 #undef elf_backend_want_got_plt
10538 #define elf_backend_want_got_plt 1
10539 #undef elf_backend_got_symbol_offset
10540 #define elf_backend_got_symbol_offset 0
10541 #undef elf_backend_plt_not_loaded
10542 #define elf_backend_plt_not_loaded 0
10543 #undef elf_backend_plt_readonly
10544 #define elf_backend_plt_readonly 1
10545 #undef elf_backend_got_header_size
10546 #define elf_backend_got_header_size 12
10547
10548 #undef bfd_elf32_get_synthetic_symtab
10549
10550 #undef bfd_elf32_bfd_link_hash_table_create
10551 #define bfd_elf32_bfd_link_hash_table_create \
10552 ppc_elf_vxworks_link_hash_table_create
10553 #undef elf_backend_add_symbol_hook
10554 #define elf_backend_add_symbol_hook \
10555 ppc_elf_vxworks_add_symbol_hook
10556 #undef elf_backend_link_output_symbol_hook
10557 #define elf_backend_link_output_symbol_hook \
10558 elf_vxworks_link_output_symbol_hook
10559 #undef elf_backend_final_write_processing
10560 #define elf_backend_final_write_processing \
10561 ppc_elf_vxworks_final_write_processing
10562 #undef elf_backend_get_sec_type_attr
10563 #define elf_backend_get_sec_type_attr \
10564 ppc_elf_vxworks_get_sec_type_attr
10565 #undef elf_backend_emit_relocs
10566 #define elf_backend_emit_relocs \
10567 elf_vxworks_emit_relocs
10568
10569 #undef elf32_bed
10570 #define elf32_bed ppc_elf_vxworks_bed
10571 #undef elf_backend_post_process_headers
10572
10573 #include "elf32-target.h"
GDB Binutils - Deliverables
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