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Add missing ld makefile dependency for nios.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2014 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 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* 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 /* Initialize howto table if not already done. */
2023 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2024 ppc_elf_howto_init ();
2025
2026 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2027 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2028
2029 /* Just because the above assert didn't trigger doesn't mean that
2030 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2031 if (!cache_ptr->howto)
2032 {
2033 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2034 abfd, ELF32_R_TYPE (dst->r_info));
2035 bfd_set_error (bfd_error_bad_value);
2036
2037 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2038 }
2039 }
2040
2041 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2042
2043 static bfd_reloc_status_type
2044 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2045 arelent *reloc_entry,
2046 asymbol *symbol,
2047 void *data ATTRIBUTE_UNUSED,
2048 asection *input_section,
2049 bfd *output_bfd,
2050 char **error_message ATTRIBUTE_UNUSED)
2051 {
2052 bfd_vma relocation;
2053
2054 if (output_bfd != NULL)
2055 {
2056 reloc_entry->address += input_section->output_offset;
2057 return bfd_reloc_ok;
2058 }
2059
2060 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2061 return bfd_reloc_outofrange;
2062
2063 if (bfd_is_com_section (symbol->section))
2064 relocation = 0;
2065 else
2066 relocation = symbol->value;
2067
2068 relocation += symbol->section->output_section->vma;
2069 relocation += symbol->section->output_offset;
2070 relocation += reloc_entry->addend;
2071 if (reloc_entry->howto->pc_relative)
2072 relocation -= reloc_entry->address;
2073
2074 reloc_entry->addend += (relocation & 0x8000) << 1;
2075
2076 return bfd_reloc_continue;
2077 }
2078
2079 static bfd_reloc_status_type
2080 ppc_elf_unhandled_reloc (bfd *abfd,
2081 arelent *reloc_entry,
2082 asymbol *symbol,
2083 void *data,
2084 asection *input_section,
2085 bfd *output_bfd,
2086 char **error_message)
2087 {
2088 /* If this is a relocatable link (output_bfd test tells us), just
2089 call the generic function. Any adjustment will be done at final
2090 link time. */
2091 if (output_bfd != NULL)
2092 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2093 input_section, output_bfd, error_message);
2094
2095 if (error_message != NULL)
2096 {
2097 static char buf[60];
2098 sprintf (buf, _("generic linker can't handle %s"),
2099 reloc_entry->howto->name);
2100 *error_message = buf;
2101 }
2102 return bfd_reloc_dangerous;
2103 }
2104 \f
2105 /* Sections created by the linker. */
2106
2107 typedef struct elf_linker_section
2108 {
2109 /* Pointer to the bfd section. */
2110 asection *section;
2111 /* Section name. */
2112 const char *name;
2113 /* Associated bss section name. */
2114 const char *bss_name;
2115 /* Associated symbol name. */
2116 const char *sym_name;
2117 /* Associated symbol. */
2118 struct elf_link_hash_entry *sym;
2119 } elf_linker_section_t;
2120
2121 /* Linked list of allocated pointer entries. This hangs off of the
2122 symbol lists, and provides allows us to return different pointers,
2123 based on different addend's. */
2124
2125 typedef struct elf_linker_section_pointers
2126 {
2127 /* next allocated pointer for this symbol */
2128 struct elf_linker_section_pointers *next;
2129 /* offset of pointer from beginning of section */
2130 bfd_vma offset;
2131 /* addend used */
2132 bfd_vma addend;
2133 /* which linker section this is */
2134 elf_linker_section_t *lsect;
2135 } elf_linker_section_pointers_t;
2136
2137 struct ppc_elf_obj_tdata
2138 {
2139 struct elf_obj_tdata elf;
2140
2141 /* A mapping from local symbols to offsets into the various linker
2142 sections added. This is index by the symbol index. */
2143 elf_linker_section_pointers_t **linker_section_pointers;
2144
2145 /* Flags used to auto-detect plt type. */
2146 unsigned int makes_plt_call : 1;
2147 unsigned int has_rel16 : 1;
2148 };
2149
2150 #define ppc_elf_tdata(bfd) \
2151 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2152
2153 #define elf_local_ptr_offsets(bfd) \
2154 (ppc_elf_tdata (bfd)->linker_section_pointers)
2155
2156 #define is_ppc_elf(bfd) \
2157 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2158 && elf_object_id (bfd) == PPC32_ELF_DATA)
2159
2160 /* Override the generic function because we store some extras. */
2161
2162 static bfd_boolean
2163 ppc_elf_mkobject (bfd *abfd)
2164 {
2165 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2166 PPC32_ELF_DATA);
2167 }
2168
2169 /* Fix bad default arch selected for a 32 bit input bfd when the
2170 default is 64 bit. */
2171
2172 static bfd_boolean
2173 ppc_elf_object_p (bfd *abfd)
2174 {
2175 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2176 {
2177 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2178
2179 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2180 {
2181 /* Relies on arch after 64 bit default being 32 bit default. */
2182 abfd->arch_info = abfd->arch_info->next;
2183 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2184 }
2185 }
2186 return TRUE;
2187 }
2188
2189 /* Function to set whether a module needs the -mrelocatable bit set. */
2190
2191 static bfd_boolean
2192 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2193 {
2194 BFD_ASSERT (!elf_flags_init (abfd)
2195 || elf_elfheader (abfd)->e_flags == flags);
2196
2197 elf_elfheader (abfd)->e_flags = flags;
2198 elf_flags_init (abfd) = TRUE;
2199 return TRUE;
2200 }
2201
2202 /* Support for core dump NOTE sections. */
2203
2204 static bfd_boolean
2205 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2206 {
2207 int offset;
2208 unsigned int size;
2209
2210 switch (note->descsz)
2211 {
2212 default:
2213 return FALSE;
2214
2215 case 268: /* Linux/PPC. */
2216 /* pr_cursig */
2217 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2218
2219 /* pr_pid */
2220 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2221
2222 /* pr_reg */
2223 offset = 72;
2224 size = 192;
2225
2226 break;
2227 }
2228
2229 /* Make a ".reg/999" section. */
2230 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2231 size, note->descpos + offset);
2232 }
2233
2234 static bfd_boolean
2235 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2236 {
2237 switch (note->descsz)
2238 {
2239 default:
2240 return FALSE;
2241
2242 case 128: /* Linux/PPC elf_prpsinfo. */
2243 elf_tdata (abfd)->core->pid
2244 = bfd_get_32 (abfd, note->descdata + 16);
2245 elf_tdata (abfd)->core->program
2246 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2247 elf_tdata (abfd)->core->command
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2249 }
2250
2251 /* Note that for some reason, a spurious space is tacked
2252 onto the end of the args in some (at least one anyway)
2253 implementations, so strip it off if it exists. */
2254
2255 {
2256 char *command = elf_tdata (abfd)->core->command;
2257 int n = strlen (command);
2258
2259 if (0 < n && command[n - 1] == ' ')
2260 command[n - 1] = '\0';
2261 }
2262
2263 return TRUE;
2264 }
2265
2266 char *
2267 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2268 const struct elf_internal_linux_prpsinfo *prpsinfo)
2269 {
2270 struct elf_external_ppc_linux_prpsinfo32 data;
2271
2272 memset (&data, 0, sizeof (data));
2273 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2274
2275 return elfcore_write_note (abfd, buf, bufsiz,
2276 "CORE", NT_PRPSINFO, &data, sizeof (data));
2277 }
2278
2279 static char *
2280 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2281 {
2282 switch (note_type)
2283 {
2284 default:
2285 return NULL;
2286
2287 case NT_PRPSINFO:
2288 {
2289 char data[128];
2290 va_list ap;
2291
2292 va_start (ap, note_type);
2293 memset (data, 0, sizeof (data));
2294 strncpy (data + 32, va_arg (ap, const char *), 16);
2295 strncpy (data + 48, va_arg (ap, const char *), 80);
2296 va_end (ap);
2297 return elfcore_write_note (abfd, buf, bufsiz,
2298 "CORE", note_type, data, sizeof (data));
2299 }
2300
2301 case NT_PRSTATUS:
2302 {
2303 char data[268];
2304 va_list ap;
2305 long pid;
2306 int cursig;
2307 const void *greg;
2308
2309 va_start (ap, note_type);
2310 memset (data, 0, 72);
2311 pid = va_arg (ap, long);
2312 bfd_put_32 (abfd, pid, data + 24);
2313 cursig = va_arg (ap, int);
2314 bfd_put_16 (abfd, cursig, data + 12);
2315 greg = va_arg (ap, const void *);
2316 memcpy (data + 72, greg, 192);
2317 memset (data + 264, 0, 4);
2318 va_end (ap);
2319 return elfcore_write_note (abfd, buf, bufsiz,
2320 "CORE", note_type, data, sizeof (data));
2321 }
2322 }
2323 }
2324
2325 static flagword
2326 ppc_elf_lookup_section_flags (char *flag_name)
2327 {
2328
2329 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2330 return SHF_PPC_VLE;
2331
2332 return 0;
2333 }
2334
2335 /* Add the VLE flag if required. */
2336
2337 bfd_boolean
2338 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2339 {
2340 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2341 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2342 shdr->sh_flags |= SHF_PPC_VLE;
2343
2344 return TRUE;
2345 }
2346
2347 /* Return address for Ith PLT stub in section PLT, for relocation REL
2348 or (bfd_vma) -1 if it should not be included. */
2349
2350 static bfd_vma
2351 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2352 const asection *plt ATTRIBUTE_UNUSED,
2353 const arelent *rel)
2354 {
2355 return rel->address;
2356 }
2357
2358 /* Handle a PowerPC specific section when reading an object file. This
2359 is called when bfd_section_from_shdr finds a section with an unknown
2360 type. */
2361
2362 static bfd_boolean
2363 ppc_elf_section_from_shdr (bfd *abfd,
2364 Elf_Internal_Shdr *hdr,
2365 const char *name,
2366 int shindex)
2367 {
2368 asection *newsect;
2369 flagword flags;
2370
2371 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2372 return FALSE;
2373
2374 newsect = hdr->bfd_section;
2375 flags = bfd_get_section_flags (abfd, newsect);
2376 if (hdr->sh_flags & SHF_EXCLUDE)
2377 flags |= SEC_EXCLUDE;
2378
2379 if (hdr->sh_type == SHT_ORDERED)
2380 flags |= SEC_SORT_ENTRIES;
2381
2382 bfd_set_section_flags (abfd, newsect, flags);
2383 return TRUE;
2384 }
2385
2386 /* Set up any other section flags and such that may be necessary. */
2387
2388 static bfd_boolean
2389 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2390 Elf_Internal_Shdr *shdr,
2391 asection *asect)
2392 {
2393 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2394 shdr->sh_type = SHT_ORDERED;
2395
2396 return TRUE;
2397 }
2398
2399 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2400 need to bump up the number of section headers. */
2401
2402 static int
2403 ppc_elf_additional_program_headers (bfd *abfd,
2404 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2405 {
2406 asection *s;
2407 int ret = 0;
2408
2409 s = bfd_get_section_by_name (abfd, ".sbss2");
2410 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2411 ++ret;
2412
2413 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2414 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2415 ++ret;
2416
2417 return ret;
2418 }
2419
2420 /* Modify the segment map for VLE executables. */
2421
2422 bfd_boolean
2423 ppc_elf_modify_segment_map (bfd *abfd,
2424 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2425 {
2426 struct elf_segment_map *m, *n;
2427 bfd_size_type amt;
2428 unsigned int j, k;
2429 bfd_boolean sect0_vle, sectj_vle;
2430
2431 /* At this point in the link, output sections have already been sorted by
2432 LMA and assigned to segments. All that is left to do is to ensure
2433 there is no mixing of VLE & non-VLE sections in a text segment.
2434 If we find that case, we split the segment.
2435 We maintain the original output section order. */
2436
2437 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2438 {
2439 if (m->count == 0)
2440 continue;
2441
2442 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2443 for (j = 1; j < m->count; ++j)
2444 {
2445 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2446
2447 if (sectj_vle != sect0_vle)
2448 break;
2449 }
2450 if (j >= m->count)
2451 continue;
2452
2453 /* sections 0..j-1 stay in this (current) segment,
2454 the remainder are put in a new segment.
2455 The scan resumes with the new segment. */
2456
2457 /* Fix the new segment. */
2458 amt = sizeof (struct elf_segment_map);
2459 amt += (m->count - j - 1) * sizeof (asection *);
2460 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2461 if (n == NULL)
2462 return FALSE;
2463
2464 n->p_type = PT_LOAD;
2465 n->p_flags = PF_X | PF_R;
2466 if (sectj_vle)
2467 n->p_flags |= PF_PPC_VLE;
2468 n->count = m->count - j;
2469 for (k = 0; k < n->count; ++k)
2470 {
2471 n->sections[k] = m->sections[j+k];
2472 m->sections[j+k] = NULL;
2473 }
2474 n->next = m->next;
2475 m->next = n;
2476
2477 /* Fix the current segment */
2478 m->count = j;
2479 }
2480
2481 return TRUE;
2482 }
2483
2484 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2485 .PPC.EMB.sbss0 a normal section, and not a bss section so
2486 that the linker doesn't crater when trying to make more than
2487 2 sections. */
2488
2489 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2490 {
2491 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2492 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2493 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2494 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2497 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2498 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2500 { NULL, 0, 0, 0, 0 }
2501 };
2502
2503 /* This is what we want for new plt/got. */
2504 static struct bfd_elf_special_section ppc_alt_plt =
2505 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2506
2507 static const struct bfd_elf_special_section *
2508 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2509 {
2510 const struct bfd_elf_special_section *ssect;
2511
2512 /* See if this is one of the special sections. */
2513 if (sec->name == NULL)
2514 return NULL;
2515
2516 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2517 sec->use_rela_p);
2518 if (ssect != NULL)
2519 {
2520 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2521 ssect = &ppc_alt_plt;
2522 return ssect;
2523 }
2524
2525 return _bfd_elf_get_sec_type_attr (abfd, sec);
2526 }
2527 \f
2528 /* Very simple linked list structure for recording apuinfo values. */
2529 typedef struct apuinfo_list
2530 {
2531 struct apuinfo_list *next;
2532 unsigned long value;
2533 }
2534 apuinfo_list;
2535
2536 static apuinfo_list *head;
2537 static bfd_boolean apuinfo_set;
2538
2539 static void
2540 apuinfo_list_init (void)
2541 {
2542 head = NULL;
2543 apuinfo_set = FALSE;
2544 }
2545
2546 static void
2547 apuinfo_list_add (unsigned long value)
2548 {
2549 apuinfo_list *entry = head;
2550
2551 while (entry != NULL)
2552 {
2553 if (entry->value == value)
2554 return;
2555 entry = entry->next;
2556 }
2557
2558 entry = bfd_malloc (sizeof (* entry));
2559 if (entry == NULL)
2560 return;
2561
2562 entry->value = value;
2563 entry->next = head;
2564 head = entry;
2565 }
2566
2567 static unsigned
2568 apuinfo_list_length (void)
2569 {
2570 apuinfo_list *entry;
2571 unsigned long count;
2572
2573 for (entry = head, count = 0;
2574 entry;
2575 entry = entry->next)
2576 ++ count;
2577
2578 return count;
2579 }
2580
2581 static inline unsigned long
2582 apuinfo_list_element (unsigned long number)
2583 {
2584 apuinfo_list * entry;
2585
2586 for (entry = head;
2587 entry && number --;
2588 entry = entry->next)
2589 ;
2590
2591 return entry ? entry->value : 0;
2592 }
2593
2594 static void
2595 apuinfo_list_finish (void)
2596 {
2597 apuinfo_list *entry;
2598
2599 for (entry = head; entry;)
2600 {
2601 apuinfo_list *next = entry->next;
2602 free (entry);
2603 entry = next;
2604 }
2605
2606 head = NULL;
2607 }
2608
2609 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2610 #define APUINFO_LABEL "APUinfo"
2611
2612 /* Scan the input BFDs and create a linked list of
2613 the APUinfo values that will need to be emitted. */
2614
2615 static void
2616 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2617 {
2618 bfd *ibfd;
2619 asection *asec;
2620 char *buffer = NULL;
2621 bfd_size_type largest_input_size = 0;
2622 unsigned i;
2623 unsigned long length;
2624 const char *error_message = NULL;
2625
2626 if (link_info == NULL)
2627 return;
2628
2629 apuinfo_list_init ();
2630
2631 /* Read in the input sections contents. */
2632 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2633 {
2634 unsigned long datum;
2635
2636 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2637 if (asec == NULL)
2638 continue;
2639
2640 error_message = _("corrupt %s section in %B");
2641 length = asec->size;
2642 if (length < 20)
2643 goto fail;
2644
2645 apuinfo_set = TRUE;
2646 if (largest_input_size < asec->size)
2647 {
2648 if (buffer)
2649 free (buffer);
2650 largest_input_size = asec->size;
2651 buffer = bfd_malloc (largest_input_size);
2652 if (!buffer)
2653 return;
2654 }
2655
2656 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2657 || (bfd_bread (buffer, length, ibfd) != length))
2658 {
2659 error_message = _("unable to read in %s section from %B");
2660 goto fail;
2661 }
2662
2663 /* Verify the contents of the header. Note - we have to
2664 extract the values this way in order to allow for a
2665 host whose endian-ness is different from the target. */
2666 datum = bfd_get_32 (ibfd, buffer);
2667 if (datum != sizeof APUINFO_LABEL)
2668 goto fail;
2669
2670 datum = bfd_get_32 (ibfd, buffer + 8);
2671 if (datum != 0x2)
2672 goto fail;
2673
2674 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2675 goto fail;
2676
2677 /* Get the number of bytes used for apuinfo entries. */
2678 datum = bfd_get_32 (ibfd, buffer + 4);
2679 if (datum + 20 != length)
2680 goto fail;
2681
2682 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2683 for (i = 0; i < datum; i += 4)
2684 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2685 }
2686
2687 error_message = NULL;
2688
2689 if (apuinfo_set)
2690 {
2691 /* Compute the size of the output section. */
2692 unsigned num_entries = apuinfo_list_length ();
2693
2694 /* Set the output section size, if it exists. */
2695 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2696
2697 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2698 {
2699 ibfd = abfd;
2700 error_message = _("warning: unable to set size of %s section in %B");
2701 }
2702 }
2703
2704 fail:
2705 if (buffer)
2706 free (buffer);
2707
2708 if (error_message)
2709 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2710 }
2711
2712 /* Prevent the output section from accumulating the input sections'
2713 contents. We have already stored this in our linked list structure. */
2714
2715 static bfd_boolean
2716 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2717 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2718 asection *asec,
2719 bfd_byte *contents ATTRIBUTE_UNUSED)
2720 {
2721 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2722 }
2723
2724 /* Finally we can generate the output section. */
2725
2726 static void
2727 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2728 {
2729 bfd_byte *buffer;
2730 asection *asec;
2731 unsigned i;
2732 unsigned num_entries;
2733 bfd_size_type length;
2734
2735 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2736 if (asec == NULL)
2737 return;
2738
2739 if (!apuinfo_set)
2740 return;
2741
2742 length = asec->size;
2743 if (length < 20)
2744 return;
2745
2746 buffer = bfd_malloc (length);
2747 if (buffer == NULL)
2748 {
2749 (*_bfd_error_handler)
2750 (_("failed to allocate space for new APUinfo section."));
2751 return;
2752 }
2753
2754 /* Create the apuinfo header. */
2755 num_entries = apuinfo_list_length ();
2756 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2757 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2758 bfd_put_32 (abfd, 0x2, buffer + 8);
2759 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2760
2761 length = 20;
2762 for (i = 0; i < num_entries; i++)
2763 {
2764 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2765 length += 4;
2766 }
2767
2768 if (length != asec->size)
2769 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2770
2771 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2772 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2773
2774 free (buffer);
2775
2776 apuinfo_list_finish ();
2777 }
2778 \f
2779 static bfd_boolean
2780 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2781 {
2782 bfd_byte buf[GLINK_ENTRY_SIZE];
2783
2784 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2785 return FALSE;
2786
2787 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2788 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2789 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2790 && bfd_get_32 (abfd, buf + 12) == BCTR);
2791 }
2792
2793 static bfd_boolean
2794 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2795 {
2796 bfd_vma vma = *(bfd_vma *) ptr;
2797 return ((section->flags & SEC_ALLOC) != 0
2798 && section->vma <= vma
2799 && vma < section->vma + section->size);
2800 }
2801
2802 static long
2803 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2804 long dynsymcount, asymbol **dynsyms,
2805 asymbol **ret)
2806 {
2807 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2808 asection *plt, *relplt, *dynamic, *glink;
2809 bfd_vma glink_vma = 0;
2810 bfd_vma resolv_vma = 0;
2811 bfd_vma stub_vma;
2812 asymbol *s;
2813 arelent *p;
2814 long count, i;
2815 size_t size;
2816 char *names;
2817 bfd_byte buf[4];
2818
2819 *ret = NULL;
2820
2821 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2822 return 0;
2823
2824 if (dynsymcount <= 0)
2825 return 0;
2826
2827 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2828 if (relplt == NULL)
2829 return 0;
2830
2831 plt = bfd_get_section_by_name (abfd, ".plt");
2832 if (plt == NULL)
2833 return 0;
2834
2835 /* Call common code to handle old-style executable PLTs. */
2836 if (elf_section_flags (plt) & SHF_EXECINSTR)
2837 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2838 dynsymcount, dynsyms, ret);
2839
2840 /* If this object was prelinked, the prelinker stored the address
2841 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2842 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2843 if (dynamic != NULL)
2844 {
2845 bfd_byte *dynbuf, *extdyn, *extdynend;
2846 size_t extdynsize;
2847 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2848
2849 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2850 return -1;
2851
2852 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2853 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2854
2855 extdyn = dynbuf;
2856 extdynend = extdyn + dynamic->size;
2857 for (; extdyn < extdynend; extdyn += extdynsize)
2858 {
2859 Elf_Internal_Dyn dyn;
2860 (*swap_dyn_in) (abfd, extdyn, &dyn);
2861
2862 if (dyn.d_tag == DT_NULL)
2863 break;
2864
2865 if (dyn.d_tag == DT_PPC_GOT)
2866 {
2867 unsigned int g_o_t = dyn.d_un.d_val;
2868 asection *got = bfd_get_section_by_name (abfd, ".got");
2869 if (got != NULL
2870 && bfd_get_section_contents (abfd, got, buf,
2871 g_o_t - got->vma + 4, 4))
2872 glink_vma = bfd_get_32 (abfd, buf);
2873 break;
2874 }
2875 }
2876 free (dynbuf);
2877 }
2878
2879 /* Otherwise we read the first plt entry. */
2880 if (glink_vma == 0)
2881 {
2882 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2883 glink_vma = bfd_get_32 (abfd, buf);
2884 }
2885
2886 if (glink_vma == 0)
2887 return 0;
2888
2889 /* The .glink section usually does not survive the final
2890 link; search for the section (usually .text) where the
2891 glink stubs now reside. */
2892 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2893 if (glink == NULL)
2894 return 0;
2895
2896 /* Determine glink PLT resolver by reading the relative branch
2897 from the first glink stub. */
2898 if (bfd_get_section_contents (abfd, glink, buf,
2899 glink_vma - glink->vma, 4))
2900 {
2901 unsigned int insn = bfd_get_32 (abfd, buf);
2902
2903 /* The first glink stub may either branch to the resolver ... */
2904 insn ^= B;
2905 if ((insn & ~0x3fffffc) == 0)
2906 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2907
2908 /* ... or fall through a bunch of NOPs. */
2909 else if ((insn ^ B ^ NOP) == 0)
2910 for (i = 4;
2911 bfd_get_section_contents (abfd, glink, buf,
2912 glink_vma - glink->vma + i, 4);
2913 i += 4)
2914 if (bfd_get_32 (abfd, buf) != NOP)
2915 {
2916 resolv_vma = glink_vma + i;
2917 break;
2918 }
2919 }
2920
2921 count = relplt->size / sizeof (Elf32_External_Rela);
2922 stub_vma = glink_vma - (bfd_vma) count * 16;
2923 /* If the stubs are those for -shared/-pie then we might have
2924 multiple stubs for each plt entry. If that is the case then
2925 there is no way to associate stubs with their plt entries short
2926 of figuring out the GOT pointer value used in the stub. */
2927 if (!is_nonpic_glink_stub (abfd, glink,
2928 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2929 return 0;
2930
2931 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2932 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2933 return -1;
2934
2935 size = count * sizeof (asymbol);
2936 p = relplt->relocation;
2937 for (i = 0; i < count; i++, p++)
2938 {
2939 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2940 if (p->addend != 0)
2941 size += sizeof ("+0x") - 1 + 8;
2942 }
2943
2944 size += sizeof (asymbol) + sizeof ("__glink");
2945
2946 if (resolv_vma)
2947 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2948
2949 s = *ret = bfd_malloc (size);
2950 if (s == NULL)
2951 return -1;
2952
2953 names = (char *) (s + count + 1 + (resolv_vma != 0));
2954 p = relplt->relocation;
2955 for (i = 0; i < count; i++, p++)
2956 {
2957 size_t len;
2958
2959 *s = **p->sym_ptr_ptr;
2960 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2961 we are defining a symbol, ensure one of them is set. */
2962 if ((s->flags & BSF_LOCAL) == 0)
2963 s->flags |= BSF_GLOBAL;
2964 s->flags |= BSF_SYNTHETIC;
2965 s->section = glink;
2966 s->value = stub_vma - glink->vma;
2967 s->name = names;
2968 s->udata.p = NULL;
2969 len = strlen ((*p->sym_ptr_ptr)->name);
2970 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2971 names += len;
2972 if (p->addend != 0)
2973 {
2974 memcpy (names, "+0x", sizeof ("+0x") - 1);
2975 names += sizeof ("+0x") - 1;
2976 bfd_sprintf_vma (abfd, names, p->addend);
2977 names += strlen (names);
2978 }
2979 memcpy (names, "@plt", sizeof ("@plt"));
2980 names += sizeof ("@plt");
2981 ++s;
2982 stub_vma += 16;
2983 }
2984
2985 /* Add a symbol at the start of the glink branch table. */
2986 memset (s, 0, sizeof *s);
2987 s->the_bfd = abfd;
2988 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2989 s->section = glink;
2990 s->value = glink_vma - glink->vma;
2991 s->name = names;
2992 memcpy (names, "__glink", sizeof ("__glink"));
2993 names += sizeof ("__glink");
2994 s++;
2995 count++;
2996
2997 if (resolv_vma)
2998 {
2999 /* Add a symbol for the glink PLT resolver. */
3000 memset (s, 0, sizeof *s);
3001 s->the_bfd = abfd;
3002 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3003 s->section = glink;
3004 s->value = resolv_vma - glink->vma;
3005 s->name = names;
3006 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3007 names += sizeof ("__glink_PLTresolve");
3008 s++;
3009 count++;
3010 }
3011
3012 return count;
3013 }
3014 \f
3015 /* The following functions are specific to the ELF linker, while
3016 functions above are used generally. They appear in this file more
3017 or less in the order in which they are called. eg.
3018 ppc_elf_check_relocs is called early in the link process,
3019 ppc_elf_finish_dynamic_sections is one of the last functions
3020 called. */
3021
3022 /* Track PLT entries needed for a given symbol. We might need more
3023 than one glink entry per symbol when generating a pic binary. */
3024 struct plt_entry
3025 {
3026 struct plt_entry *next;
3027
3028 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3029 This field stores the offset into .got2 used to initialise the
3030 GOT pointer reg. It will always be at least 32768. (Current
3031 gcc always uses an offset of 32768, but ld -r will pack .got2
3032 sections together resulting in larger offsets). */
3033 bfd_vma addend;
3034
3035 /* The .got2 section. */
3036 asection *sec;
3037
3038 /* PLT refcount or offset. */
3039 union
3040 {
3041 bfd_signed_vma refcount;
3042 bfd_vma offset;
3043 } plt;
3044
3045 /* .glink stub offset. */
3046 bfd_vma glink_offset;
3047 };
3048
3049 /* Of those relocs that might be copied as dynamic relocs, this function
3050 selects those that must be copied when linking a shared library,
3051 even when the symbol is local. */
3052
3053 static int
3054 must_be_dyn_reloc (struct bfd_link_info *info,
3055 enum elf_ppc_reloc_type r_type)
3056 {
3057 switch (r_type)
3058 {
3059 default:
3060 return 1;
3061
3062 case R_PPC_REL24:
3063 case R_PPC_REL14:
3064 case R_PPC_REL14_BRTAKEN:
3065 case R_PPC_REL14_BRNTAKEN:
3066 case R_PPC_REL32:
3067 return 0;
3068
3069 case R_PPC_TPREL32:
3070 case R_PPC_TPREL16:
3071 case R_PPC_TPREL16_LO:
3072 case R_PPC_TPREL16_HI:
3073 case R_PPC_TPREL16_HA:
3074 return !info->executable;
3075 }
3076 }
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. */
3082 #define ELIMINATE_COPY_RELOCS 1
3083
3084 /* Used to track dynamic relocations for local symbols. */
3085 struct ppc_dyn_relocs
3086 {
3087 struct ppc_dyn_relocs *next;
3088
3089 /* The input section of the reloc. */
3090 asection *sec;
3091
3092 /* Total number of relocs copied for the input section. */
3093 unsigned int count : 31;
3094
3095 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3096 unsigned int ifunc : 1;
3097 };
3098
3099 /* PPC ELF linker hash entry. */
3100
3101 struct ppc_elf_link_hash_entry
3102 {
3103 struct elf_link_hash_entry elf;
3104
3105 /* If this symbol is used in the linker created sections, the processor
3106 specific backend uses this field to map the field into the offset
3107 from the beginning of the section. */
3108 elf_linker_section_pointers_t *linker_section_pointer;
3109
3110 /* Track dynamic relocs copied for this symbol. */
3111 struct elf_dyn_relocs *dyn_relocs;
3112
3113 /* Contexts in which symbol is used in the GOT (or TOC).
3114 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3115 corresponding relocs are encountered during check_relocs.
3116 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3117 indicate the corresponding GOT entry type is not needed. */
3118 #define TLS_GD 1 /* GD reloc. */
3119 #define TLS_LD 2 /* LD reloc. */
3120 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3121 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3122 #define TLS_TLS 16 /* Any TLS reloc. */
3123 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3124 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3125 char tls_mask;
3126
3127 /* Nonzero if we have seen a small data relocation referring to this
3128 symbol. */
3129 unsigned char has_sda_refs;
3130 };
3131
3132 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3133
3134 /* PPC ELF linker hash table. */
3135
3136 struct ppc_elf_link_hash_table
3137 {
3138 struct elf_link_hash_table elf;
3139
3140 /* Various options passed from the linker. */
3141 struct ppc_elf_params *params;
3142
3143 /* Short-cuts to get to dynamic linker sections. */
3144 asection *got;
3145 asection *relgot;
3146 asection *glink;
3147 asection *plt;
3148 asection *relplt;
3149 asection *iplt;
3150 asection *reliplt;
3151 asection *dynbss;
3152 asection *relbss;
3153 asection *dynsbss;
3154 asection *relsbss;
3155 elf_linker_section_t sdata[2];
3156 asection *sbss;
3157 asection *glink_eh_frame;
3158
3159 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3160 asection *srelplt2;
3161
3162 /* The .got.plt section (VxWorks only)*/
3163 asection *sgotplt;
3164
3165 /* Shortcut to __tls_get_addr. */
3166 struct elf_link_hash_entry *tls_get_addr;
3167
3168 /* The bfd that forced an old-style PLT. */
3169 bfd *old_bfd;
3170
3171 /* TLS local dynamic got entry handling. */
3172 union {
3173 bfd_signed_vma refcount;
3174 bfd_vma offset;
3175 } tlsld_got;
3176
3177 /* Offset of branch table to PltResolve function in glink. */
3178 bfd_vma glink_pltresolve;
3179
3180 /* Size of reserved GOT entries. */
3181 unsigned int got_header_size;
3182 /* Non-zero if allocating the header left a gap. */
3183 unsigned int got_gap;
3184
3185 /* The type of PLT we have chosen to use. */
3186 enum ppc_elf_plt_type plt_type;
3187
3188 /* True if the target system is VxWorks. */
3189 unsigned int is_vxworks:1;
3190
3191 /* The size of PLT entries. */
3192 int plt_entry_size;
3193 /* The distance between adjacent PLT slots. */
3194 int plt_slot_size;
3195 /* The size of the first PLT entry. */
3196 int plt_initial_entry_size;
3197
3198 /* Small local sym cache. */
3199 struct sym_cache sym_cache;
3200 };
3201
3202 /* Rename some of the generic section flags to better document how they
3203 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3204
3205 /* Nonzero if this section has TLS related relocations. */
3206 #define has_tls_reloc sec_flg0
3207
3208 /* Nonzero if this section has a call to __tls_get_addr. */
3209 #define has_tls_get_addr_call sec_flg1
3210
3211 /* Get the PPC ELF linker hash table from a link_info structure. */
3212
3213 #define ppc_elf_hash_table(p) \
3214 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3215 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3216
3217 /* Create an entry in a PPC ELF linker hash table. */
3218
3219 static struct bfd_hash_entry *
3220 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3221 struct bfd_hash_table *table,
3222 const char *string)
3223 {
3224 /* Allocate the structure if it has not already been allocated by a
3225 subclass. */
3226 if (entry == NULL)
3227 {
3228 entry = bfd_hash_allocate (table,
3229 sizeof (struct ppc_elf_link_hash_entry));
3230 if (entry == NULL)
3231 return entry;
3232 }
3233
3234 /* Call the allocation method of the superclass. */
3235 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3236 if (entry != NULL)
3237 {
3238 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3239 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3240 ppc_elf_hash_entry (entry)->tls_mask = 0;
3241 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3242 }
3243
3244 return entry;
3245 }
3246
3247 /* Create a PPC ELF linker hash table. */
3248
3249 static struct bfd_link_hash_table *
3250 ppc_elf_link_hash_table_create (bfd *abfd)
3251 {
3252 struct ppc_elf_link_hash_table *ret;
3253 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3254
3255 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3256 if (ret == NULL)
3257 return NULL;
3258
3259 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3260 ppc_elf_link_hash_newfunc,
3261 sizeof (struct ppc_elf_link_hash_entry),
3262 PPC32_ELF_DATA))
3263 {
3264 free (ret);
3265 return NULL;
3266 }
3267
3268 ret->elf.init_plt_refcount.refcount = 0;
3269 ret->elf.init_plt_refcount.glist = NULL;
3270 ret->elf.init_plt_offset.offset = 0;
3271 ret->elf.init_plt_offset.glist = NULL;
3272
3273 ret->params = &default_params;
3274
3275 ret->sdata[0].name = ".sdata";
3276 ret->sdata[0].sym_name = "_SDA_BASE_";
3277 ret->sdata[0].bss_name = ".sbss";
3278
3279 ret->sdata[1].name = ".sdata2";
3280 ret->sdata[1].sym_name = "_SDA2_BASE_";
3281 ret->sdata[1].bss_name = ".sbss2";
3282
3283 ret->plt_entry_size = 12;
3284 ret->plt_slot_size = 8;
3285 ret->plt_initial_entry_size = 72;
3286
3287 return &ret->elf.root;
3288 }
3289
3290 /* Hook linker params into hash table. */
3291
3292 void
3293 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3294 {
3295 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3296
3297 if (htab)
3298 htab->params = params;
3299 }
3300
3301 /* Create .got and the related sections. */
3302
3303 static bfd_boolean
3304 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3305 {
3306 struct ppc_elf_link_hash_table *htab;
3307 asection *s;
3308 flagword flags;
3309
3310 if (!_bfd_elf_create_got_section (abfd, info))
3311 return FALSE;
3312
3313 htab = ppc_elf_hash_table (info);
3314 htab->got = s = bfd_get_linker_section (abfd, ".got");
3315 if (s == NULL)
3316 abort ();
3317
3318 if (htab->is_vxworks)
3319 {
3320 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3321 if (!htab->sgotplt)
3322 abort ();
3323 }
3324 else
3325 {
3326 /* The powerpc .got has a blrl instruction in it. Mark it
3327 executable. */
3328 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3329 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3330 if (!bfd_set_section_flags (abfd, s, flags))
3331 return FALSE;
3332 }
3333
3334 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3335 if (!htab->relgot)
3336 abort ();
3337
3338 return TRUE;
3339 }
3340
3341 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3342 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3343 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3344
3345 static bfd_boolean
3346 ppc_elf_create_linker_section (bfd *abfd,
3347 struct bfd_link_info *info,
3348 flagword flags,
3349 elf_linker_section_t *lsect)
3350 {
3351 asection *s;
3352
3353 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3354 | SEC_LINKER_CREATED);
3355
3356 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3357 if (s == NULL)
3358 return FALSE;
3359 lsect->section = s;
3360
3361 /* Define the sym on the first section of this name. */
3362 s = bfd_get_section_by_name (abfd, lsect->name);
3363
3364 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3365 if (lsect->sym == NULL)
3366 return FALSE;
3367 lsect->sym->root.u.def.value = 0x8000;
3368 return TRUE;
3369 }
3370
3371 static bfd_boolean
3372 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3373 {
3374 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3375 asection *s;
3376 flagword flags;
3377
3378 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3379 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3380 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3381 htab->glink = s;
3382 if (s == NULL
3383 || !bfd_set_section_alignment (abfd, s,
3384 htab->params->ppc476_workaround ? 6 : 4))
3385 return FALSE;
3386
3387 if (!info->no_ld_generated_unwind_info)
3388 {
3389 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3390 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3391 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3392 htab->glink_eh_frame = s;
3393 if (s == NULL
3394 || !bfd_set_section_alignment (abfd, s, 2))
3395 return FALSE;
3396 }
3397
3398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3399 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3400 htab->iplt = s;
3401 if (s == NULL
3402 || !bfd_set_section_alignment (abfd, s, 4))
3403 return FALSE;
3404
3405 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3406 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3407 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3408 htab->reliplt = s;
3409 if (s == NULL
3410 || ! bfd_set_section_alignment (abfd, s, 2))
3411 return FALSE;
3412
3413 if (!ppc_elf_create_linker_section (abfd, info, 0,
3414 &htab->sdata[0]))
3415 return FALSE;
3416
3417 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3418 &htab->sdata[1]))
3419 return FALSE;
3420
3421 return TRUE;
3422 }
3423
3424 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3425 to output sections (just like _bfd_elf_create_dynamic_sections has
3426 to create .dynbss and .rela.bss). */
3427
3428 static bfd_boolean
3429 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432 asection *s;
3433 flagword flags;
3434
3435 htab = ppc_elf_hash_table (info);
3436
3437 if (htab->got == NULL
3438 && !ppc_elf_create_got (abfd, info))
3439 return FALSE;
3440
3441 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3442 return FALSE;
3443
3444 if (htab->glink == NULL
3445 && !ppc_elf_create_glink (abfd, info))
3446 return FALSE;
3447
3448 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3449 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3450 SEC_ALLOC | SEC_LINKER_CREATED);
3451 htab->dynsbss = s;
3452 if (s == NULL)
3453 return FALSE;
3454
3455 if (! info->shared)
3456 {
3457 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3458 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3459 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3460 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3461 htab->relsbss = s;
3462 if (s == NULL
3463 || ! bfd_set_section_alignment (abfd, s, 2))
3464 return FALSE;
3465 }
3466
3467 if (htab->is_vxworks
3468 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3469 return FALSE;
3470
3471 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3472 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3473 if (s == NULL)
3474 abort ();
3475
3476 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3477 if (htab->plt_type == PLT_VXWORKS)
3478 /* The VxWorks PLT is a loaded section with contents. */
3479 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3480 return bfd_set_section_flags (abfd, s, flags);
3481 }
3482
3483 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3484
3485 static void
3486 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3487 struct elf_link_hash_entry *dir,
3488 struct elf_link_hash_entry *ind)
3489 {
3490 struct ppc_elf_link_hash_entry *edir, *eind;
3491
3492 edir = (struct ppc_elf_link_hash_entry *) dir;
3493 eind = (struct ppc_elf_link_hash_entry *) ind;
3494
3495 edir->tls_mask |= eind->tls_mask;
3496 edir->has_sda_refs |= eind->has_sda_refs;
3497
3498 /* If called to transfer flags for a weakdef during processing
3499 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3500 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3501 if (!(ELIMINATE_COPY_RELOCS
3502 && eind->elf.root.type != bfd_link_hash_indirect
3503 && edir->elf.dynamic_adjusted))
3504 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3505
3506 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3507 edir->elf.ref_regular |= eind->elf.ref_regular;
3508 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3509 edir->elf.needs_plt |= eind->elf.needs_plt;
3510 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3511
3512 if (eind->dyn_relocs != NULL)
3513 {
3514 if (edir->dyn_relocs != NULL)
3515 {
3516 struct elf_dyn_relocs **pp;
3517 struct elf_dyn_relocs *p;
3518
3519 /* Add reloc counts against the indirect sym to the direct sym
3520 list. Merge any entries against the same section. */
3521 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3522 {
3523 struct elf_dyn_relocs *q;
3524
3525 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3526 if (q->sec == p->sec)
3527 {
3528 q->pc_count += p->pc_count;
3529 q->count += p->count;
3530 *pp = p->next;
3531 break;
3532 }
3533 if (q == NULL)
3534 pp = &p->next;
3535 }
3536 *pp = edir->dyn_relocs;
3537 }
3538
3539 edir->dyn_relocs = eind->dyn_relocs;
3540 eind->dyn_relocs = NULL;
3541 }
3542
3543 /* If we were called to copy over info for a weak sym, that's all.
3544 You might think dyn_relocs need not be copied over; After all,
3545 both syms will be dynamic or both non-dynamic so we're just
3546 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3547 code in ppc_elf_adjust_dynamic_symbol needs to check for
3548 dyn_relocs in read-only sections, and it does so on what is the
3549 DIR sym here. */
3550 if (eind->elf.root.type != bfd_link_hash_indirect)
3551 return;
3552
3553 /* Copy over the GOT refcount entries that we may have already seen to
3554 the symbol which just became indirect. */
3555 edir->elf.got.refcount += eind->elf.got.refcount;
3556 eind->elf.got.refcount = 0;
3557
3558 /* And plt entries. */
3559 if (eind->elf.plt.plist != NULL)
3560 {
3561 if (edir->elf.plt.plist != NULL)
3562 {
3563 struct plt_entry **entp;
3564 struct plt_entry *ent;
3565
3566 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3567 {
3568 struct plt_entry *dent;
3569
3570 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3571 if (dent->sec == ent->sec && dent->addend == ent->addend)
3572 {
3573 dent->plt.refcount += ent->plt.refcount;
3574 *entp = ent->next;
3575 break;
3576 }
3577 if (dent == NULL)
3578 entp = &ent->next;
3579 }
3580 *entp = edir->elf.plt.plist;
3581 }
3582
3583 edir->elf.plt.plist = eind->elf.plt.plist;
3584 eind->elf.plt.plist = NULL;
3585 }
3586
3587 if (eind->elf.dynindx != -1)
3588 {
3589 if (edir->elf.dynindx != -1)
3590 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3591 edir->elf.dynstr_index);
3592 edir->elf.dynindx = eind->elf.dynindx;
3593 edir->elf.dynstr_index = eind->elf.dynstr_index;
3594 eind->elf.dynindx = -1;
3595 eind->elf.dynstr_index = 0;
3596 }
3597 }
3598
3599 /* Hook called by the linker routine which adds symbols from an object
3600 file. We use it to put .comm items in .sbss, and not .bss. */
3601
3602 static bfd_boolean
3603 ppc_elf_add_symbol_hook (bfd *abfd,
3604 struct bfd_link_info *info,
3605 Elf_Internal_Sym *sym,
3606 const char **namep ATTRIBUTE_UNUSED,
3607 flagword *flagsp ATTRIBUTE_UNUSED,
3608 asection **secp,
3609 bfd_vma *valp)
3610 {
3611 if (sym->st_shndx == SHN_COMMON
3612 && !info->relocatable
3613 && is_ppc_elf (info->output_bfd)
3614 && sym->st_size <= elf_gp_size (abfd))
3615 {
3616 /* Common symbols less than or equal to -G nn bytes are automatically
3617 put into .sbss. */
3618 struct ppc_elf_link_hash_table *htab;
3619
3620 htab = ppc_elf_hash_table (info);
3621 if (htab->sbss == NULL)
3622 {
3623 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3624
3625 if (!htab->elf.dynobj)
3626 htab->elf.dynobj = abfd;
3627
3628 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3629 ".sbss",
3630 flags);
3631 if (htab->sbss == NULL)
3632 return FALSE;
3633 }
3634
3635 *secp = htab->sbss;
3636 *valp = sym->st_size;
3637 }
3638
3639 if ((abfd->flags & DYNAMIC) == 0
3640 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3641 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3642 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3643
3644 return TRUE;
3645 }
3646 \f
3647 /* Find a linker generated pointer with a given addend and type. */
3648
3649 static elf_linker_section_pointers_t *
3650 elf_find_pointer_linker_section
3651 (elf_linker_section_pointers_t *linker_pointers,
3652 bfd_vma addend,
3653 elf_linker_section_t *lsect)
3654 {
3655 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3656 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3657 return linker_pointers;
3658
3659 return NULL;
3660 }
3661
3662 /* Allocate a pointer to live in a linker created section. */
3663
3664 static bfd_boolean
3665 elf_allocate_pointer_linker_section (bfd *abfd,
3666 elf_linker_section_t *lsect,
3667 struct elf_link_hash_entry *h,
3668 const Elf_Internal_Rela *rel)
3669 {
3670 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3671 elf_linker_section_pointers_t *linker_section_ptr;
3672 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3673 bfd_size_type amt;
3674
3675 BFD_ASSERT (lsect != NULL);
3676
3677 /* Is this a global symbol? */
3678 if (h != NULL)
3679 {
3680 struct ppc_elf_link_hash_entry *eh;
3681
3682 /* Has this symbol already been allocated? If so, our work is done. */
3683 eh = (struct ppc_elf_link_hash_entry *) h;
3684 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3685 rel->r_addend,
3686 lsect))
3687 return TRUE;
3688
3689 ptr_linker_section_ptr = &eh->linker_section_pointer;
3690 }
3691 else
3692 {
3693 BFD_ASSERT (is_ppc_elf (abfd));
3694
3695 /* Allocation of a pointer to a local symbol. */
3696 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3697
3698 /* Allocate a table to hold the local symbols if first time. */
3699 if (!ptr)
3700 {
3701 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3702
3703 amt = num_symbols;
3704 amt *= sizeof (elf_linker_section_pointers_t *);
3705 ptr = bfd_zalloc (abfd, amt);
3706
3707 if (!ptr)
3708 return FALSE;
3709
3710 elf_local_ptr_offsets (abfd) = ptr;
3711 }
3712
3713 /* Has this symbol already been allocated? If so, our work is done. */
3714 if (elf_find_pointer_linker_section (ptr[r_symndx],
3715 rel->r_addend,
3716 lsect))
3717 return TRUE;
3718
3719 ptr_linker_section_ptr = &ptr[r_symndx];
3720 }
3721
3722 /* Allocate space for a pointer in the linker section, and allocate
3723 a new pointer record from internal memory. */
3724 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3725 amt = sizeof (elf_linker_section_pointers_t);
3726 linker_section_ptr = bfd_alloc (abfd, amt);
3727
3728 if (!linker_section_ptr)
3729 return FALSE;
3730
3731 linker_section_ptr->next = *ptr_linker_section_ptr;
3732 linker_section_ptr->addend = rel->r_addend;
3733 linker_section_ptr->lsect = lsect;
3734 *ptr_linker_section_ptr = linker_section_ptr;
3735
3736 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3737 return FALSE;
3738 linker_section_ptr->offset = lsect->section->size;
3739 lsect->section->size += 4;
3740
3741 #ifdef DEBUG
3742 fprintf (stderr,
3743 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3744 lsect->name, (long) linker_section_ptr->offset,
3745 (long) lsect->section->size);
3746 #endif
3747
3748 return TRUE;
3749 }
3750
3751 static struct plt_entry **
3752 update_local_sym_info (bfd *abfd,
3753 Elf_Internal_Shdr *symtab_hdr,
3754 unsigned long r_symndx,
3755 int tls_type)
3756 {
3757 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3758 struct plt_entry **local_plt;
3759 char *local_got_tls_masks;
3760
3761 if (local_got_refcounts == NULL)
3762 {
3763 bfd_size_type size = symtab_hdr->sh_info;
3764
3765 size *= (sizeof (*local_got_refcounts)
3766 + sizeof (*local_plt)
3767 + sizeof (*local_got_tls_masks));
3768 local_got_refcounts = bfd_zalloc (abfd, size);
3769 if (local_got_refcounts == NULL)
3770 return NULL;
3771 elf_local_got_refcounts (abfd) = local_got_refcounts;
3772 }
3773
3774 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3775 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3776 local_got_tls_masks[r_symndx] |= tls_type;
3777 if (tls_type != PLT_IFUNC)
3778 local_got_refcounts[r_symndx] += 1;
3779 return local_plt + r_symndx;
3780 }
3781
3782 static bfd_boolean
3783 update_plt_info (bfd *abfd, struct plt_entry **plist,
3784 asection *sec, bfd_vma addend)
3785 {
3786 struct plt_entry *ent;
3787
3788 if (addend < 32768)
3789 sec = NULL;
3790 for (ent = *plist; ent != NULL; ent = ent->next)
3791 if (ent->sec == sec && ent->addend == addend)
3792 break;
3793 if (ent == NULL)
3794 {
3795 bfd_size_type amt = sizeof (*ent);
3796 ent = bfd_alloc (abfd, amt);
3797 if (ent == NULL)
3798 return FALSE;
3799 ent->next = *plist;
3800 ent->sec = sec;
3801 ent->addend = addend;
3802 ent->plt.refcount = 0;
3803 *plist = ent;
3804 }
3805 ent->plt.refcount += 1;
3806 return TRUE;
3807 }
3808
3809 static struct plt_entry *
3810 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3811 {
3812 struct plt_entry *ent;
3813
3814 if (addend < 32768)
3815 sec = NULL;
3816 for (ent = *plist; ent != NULL; ent = ent->next)
3817 if (ent->sec == sec && ent->addend == addend)
3818 break;
3819 return ent;
3820 }
3821
3822 static bfd_boolean
3823 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3824 {
3825 return (r_type == R_PPC_PLTREL24
3826 || r_type == R_PPC_LOCAL24PC
3827 || r_type == R_PPC_REL24
3828 || r_type == R_PPC_REL14
3829 || r_type == R_PPC_REL14_BRTAKEN
3830 || r_type == R_PPC_REL14_BRNTAKEN
3831 || r_type == R_PPC_ADDR24
3832 || r_type == R_PPC_ADDR14
3833 || r_type == R_PPC_ADDR14_BRTAKEN
3834 || r_type == R_PPC_ADDR14_BRNTAKEN);
3835 }
3836
3837 static void
3838 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3839 {
3840 (*_bfd_error_handler)
3841 (_("%B: relocation %s cannot be used when making a shared object"),
3842 abfd,
3843 ppc_elf_howto_table[r_type]->name);
3844 bfd_set_error (bfd_error_bad_value);
3845 }
3846
3847 /* Look through the relocs for a section during the first phase, and
3848 allocate space in the global offset table or procedure linkage
3849 table. */
3850
3851 static bfd_boolean
3852 ppc_elf_check_relocs (bfd *abfd,
3853 struct bfd_link_info *info,
3854 asection *sec,
3855 const Elf_Internal_Rela *relocs)
3856 {
3857 struct ppc_elf_link_hash_table *htab;
3858 Elf_Internal_Shdr *symtab_hdr;
3859 struct elf_link_hash_entry **sym_hashes;
3860 const Elf_Internal_Rela *rel;
3861 const Elf_Internal_Rela *rel_end;
3862 asection *got2, *sreloc;
3863 struct elf_link_hash_entry *tga;
3864
3865 if (info->relocatable)
3866 return TRUE;
3867
3868 /* Don't do anything special with non-loaded, non-alloced sections.
3869 In particular, any relocs in such sections should not affect GOT
3870 and PLT reference counting (ie. we don't allow them to create GOT
3871 or PLT entries), there's no possibility or desire to optimize TLS
3872 relocs, and there's not much point in propagating relocs to shared
3873 libs that the dynamic linker won't relocate. */
3874 if ((sec->flags & SEC_ALLOC) == 0)
3875 return TRUE;
3876
3877 #ifdef DEBUG
3878 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3879 sec, abfd);
3880 #endif
3881
3882 BFD_ASSERT (is_ppc_elf (abfd));
3883
3884 /* Initialize howto table if not already done. */
3885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3886 ppc_elf_howto_init ();
3887
3888 htab = ppc_elf_hash_table (info);
3889 if (htab->glink == NULL)
3890 {
3891 if (htab->elf.dynobj == NULL)
3892 htab->elf.dynobj = abfd;
3893 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3894 return FALSE;
3895 }
3896 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3897 FALSE, FALSE, TRUE);
3898 symtab_hdr = &elf_symtab_hdr (abfd);
3899 sym_hashes = elf_sym_hashes (abfd);
3900 got2 = bfd_get_section_by_name (abfd, ".got2");
3901 sreloc = NULL;
3902
3903 rel_end = relocs + sec->reloc_count;
3904 for (rel = relocs; rel < rel_end; rel++)
3905 {
3906 unsigned long r_symndx;
3907 enum elf_ppc_reloc_type r_type;
3908 struct elf_link_hash_entry *h;
3909 int tls_type;
3910
3911 r_symndx = ELF32_R_SYM (rel->r_info);
3912 if (r_symndx < symtab_hdr->sh_info)
3913 h = NULL;
3914 else
3915 {
3916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3917 while (h->root.type == bfd_link_hash_indirect
3918 || h->root.type == bfd_link_hash_warning)
3919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3920
3921 /* PR15323, ref flags aren't set for references in the same
3922 object. */
3923 h->root.non_ir_ref = 1;
3924 }
3925
3926 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3927 This shows up in particular in an R_PPC_ADDR32 in the eabi
3928 startup code. */
3929 if (h != NULL
3930 && htab->got == NULL
3931 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3932 {
3933 if (htab->elf.dynobj == NULL)
3934 htab->elf.dynobj = abfd;
3935 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3936 return FALSE;
3937 BFD_ASSERT (h == htab->elf.hgot);
3938 }
3939
3940 tls_type = 0;
3941 r_type = ELF32_R_TYPE (rel->r_info);
3942 if (h == NULL && !htab->is_vxworks)
3943 {
3944 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3945 abfd, r_symndx);
3946 if (isym == NULL)
3947 return FALSE;
3948
3949 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3950 {
3951 struct plt_entry **ifunc;
3952
3953 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3954 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3955 PLT_IFUNC);
3956 if (ifunc == NULL)
3957 return FALSE;
3958
3959 /* STT_GNU_IFUNC symbols must have a PLT entry;
3960 In a non-pie executable even when there are
3961 no plt calls. */
3962 if (!info->shared
3963 || is_branch_reloc (r_type))
3964 {
3965 bfd_vma addend = 0;
3966 if (r_type == R_PPC_PLTREL24)
3967 {
3968 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3969 if (info->shared)
3970 addend = rel->r_addend;
3971 }
3972 if (!update_plt_info (abfd, ifunc, got2, addend))
3973 return FALSE;
3974 }
3975 }
3976 }
3977
3978 if (!htab->is_vxworks
3979 && is_branch_reloc (r_type)
3980 && h != NULL
3981 && h == tga)
3982 {
3983 if (rel != relocs
3984 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3985 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3986 /* We have a new-style __tls_get_addr call with a marker
3987 reloc. */
3988 ;
3989 else
3990 /* Mark this section as having an old-style call. */
3991 sec->has_tls_get_addr_call = 1;
3992 }
3993
3994 switch (r_type)
3995 {
3996 case R_PPC_TLSGD:
3997 case R_PPC_TLSLD:
3998 /* These special tls relocs tie a call to __tls_get_addr with
3999 its parameter symbol. */
4000 break;
4001
4002 case R_PPC_GOT_TLSLD16:
4003 case R_PPC_GOT_TLSLD16_LO:
4004 case R_PPC_GOT_TLSLD16_HI:
4005 case R_PPC_GOT_TLSLD16_HA:
4006 tls_type = TLS_TLS | TLS_LD;
4007 goto dogottls;
4008
4009 case R_PPC_GOT_TLSGD16:
4010 case R_PPC_GOT_TLSGD16_LO:
4011 case R_PPC_GOT_TLSGD16_HI:
4012 case R_PPC_GOT_TLSGD16_HA:
4013 tls_type = TLS_TLS | TLS_GD;
4014 goto dogottls;
4015
4016 case R_PPC_GOT_TPREL16:
4017 case R_PPC_GOT_TPREL16_LO:
4018 case R_PPC_GOT_TPREL16_HI:
4019 case R_PPC_GOT_TPREL16_HA:
4020 if (!info->executable)
4021 info->flags |= DF_STATIC_TLS;
4022 tls_type = TLS_TLS | TLS_TPREL;
4023 goto dogottls;
4024
4025 case R_PPC_GOT_DTPREL16:
4026 case R_PPC_GOT_DTPREL16_LO:
4027 case R_PPC_GOT_DTPREL16_HI:
4028 case R_PPC_GOT_DTPREL16_HA:
4029 tls_type = TLS_TLS | TLS_DTPREL;
4030 dogottls:
4031 sec->has_tls_reloc = 1;
4032 /* Fall thru */
4033
4034 /* GOT16 relocations */
4035 case R_PPC_GOT16:
4036 case R_PPC_GOT16_LO:
4037 case R_PPC_GOT16_HI:
4038 case R_PPC_GOT16_HA:
4039 /* This symbol requires a global offset table entry. */
4040 if (htab->got == NULL)
4041 {
4042 if (htab->elf.dynobj == NULL)
4043 htab->elf.dynobj = abfd;
4044 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4045 return FALSE;
4046 }
4047 if (h != NULL)
4048 {
4049 h->got.refcount += 1;
4050 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4051 }
4052 else
4053 /* This is a global offset table entry for a local symbol. */
4054 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4055 return FALSE;
4056
4057 /* We may also need a plt entry if the symbol turns out to be
4058 an ifunc. */
4059 if (h != NULL && !info->shared)
4060 {
4061 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4062 return FALSE;
4063 }
4064 break;
4065
4066 /* Indirect .sdata relocation. */
4067 case R_PPC_EMB_SDAI16:
4068 if (info->shared)
4069 {
4070 bad_shared_reloc (abfd, r_type);
4071 return FALSE;
4072 }
4073 htab->sdata[0].sym->ref_regular = 1;
4074 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4075 h, rel))
4076 return FALSE;
4077 if (h != NULL)
4078 {
4079 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4080 h->non_got_ref = TRUE;
4081 }
4082 break;
4083
4084 /* Indirect .sdata2 relocation. */
4085 case R_PPC_EMB_SDA2I16:
4086 if (info->shared)
4087 {
4088 bad_shared_reloc (abfd, r_type);
4089 return FALSE;
4090 }
4091 htab->sdata[1].sym->ref_regular = 1;
4092 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4093 h, rel))
4094 return FALSE;
4095 if (h != NULL)
4096 {
4097 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4098 h->non_got_ref = TRUE;
4099 }
4100 break;
4101
4102 case R_PPC_SDAREL16:
4103 htab->sdata[0].sym->ref_regular = 1;
4104 /* Fall thru */
4105
4106 case R_PPC_VLE_SDAREL_LO16A:
4107 case R_PPC_VLE_SDAREL_LO16D:
4108 case R_PPC_VLE_SDAREL_HI16A:
4109 case R_PPC_VLE_SDAREL_HI16D:
4110 case R_PPC_VLE_SDAREL_HA16A:
4111 case R_PPC_VLE_SDAREL_HA16D:
4112 if (h != NULL)
4113 {
4114 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4115 h->non_got_ref = TRUE;
4116 }
4117 break;
4118
4119 case R_PPC_VLE_REL8:
4120 case R_PPC_VLE_REL15:
4121 case R_PPC_VLE_REL24:
4122 case R_PPC_VLE_LO16A:
4123 case R_PPC_VLE_LO16D:
4124 case R_PPC_VLE_HI16A:
4125 case R_PPC_VLE_HI16D:
4126 case R_PPC_VLE_HA16A:
4127 case R_PPC_VLE_HA16D:
4128 break;
4129
4130 case R_PPC_EMB_SDA2REL:
4131 if (info->shared)
4132 {
4133 bad_shared_reloc (abfd, r_type);
4134 return FALSE;
4135 }
4136 htab->sdata[1].sym->ref_regular = 1;
4137 if (h != NULL)
4138 {
4139 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4140 h->non_got_ref = TRUE;
4141 }
4142 break;
4143
4144 case R_PPC_VLE_SDA21_LO:
4145 case R_PPC_VLE_SDA21:
4146 case R_PPC_EMB_SDA21:
4147 case R_PPC_EMB_RELSDA:
4148 if (info->shared)
4149 {
4150 bad_shared_reloc (abfd, r_type);
4151 return FALSE;
4152 }
4153 if (h != NULL)
4154 {
4155 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4156 h->non_got_ref = TRUE;
4157 }
4158 break;
4159
4160 case R_PPC_EMB_NADDR32:
4161 case R_PPC_EMB_NADDR16:
4162 case R_PPC_EMB_NADDR16_LO:
4163 case R_PPC_EMB_NADDR16_HI:
4164 case R_PPC_EMB_NADDR16_HA:
4165 if (info->shared)
4166 {
4167 bad_shared_reloc (abfd, r_type);
4168 return FALSE;
4169 }
4170 if (h != NULL)
4171 h->non_got_ref = TRUE;
4172 break;
4173
4174 case R_PPC_PLTREL24:
4175 if (h == NULL)
4176 break;
4177 /* Fall through */
4178 case R_PPC_PLT32:
4179 case R_PPC_PLTREL32:
4180 case R_PPC_PLT16_LO:
4181 case R_PPC_PLT16_HI:
4182 case R_PPC_PLT16_HA:
4183 #ifdef DEBUG
4184 fprintf (stderr, "Reloc requires a PLT entry\n");
4185 #endif
4186 /* This symbol requires a procedure linkage table entry. We
4187 actually build the entry in finish_dynamic_symbol,
4188 because this might be a case of linking PIC code without
4189 linking in any dynamic objects, in which case we don't
4190 need to generate a procedure linkage table after all. */
4191
4192 if (h == NULL)
4193 {
4194 /* It does not make sense to have a procedure linkage
4195 table entry for a local symbol. */
4196 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4197 abfd, sec, rel->r_offset,
4198 ppc_elf_howto_table[r_type]->name);
4199 bfd_set_error (bfd_error_bad_value);
4200 return FALSE;
4201 }
4202 else
4203 {
4204 bfd_vma addend = 0;
4205
4206 if (r_type == R_PPC_PLTREL24)
4207 {
4208 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4209 if (info->shared)
4210 addend = rel->r_addend;
4211 }
4212 h->needs_plt = 1;
4213 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4214 return FALSE;
4215 }
4216 break;
4217
4218 /* The following relocations don't need to propagate the
4219 relocation if linking a shared object since they are
4220 section relative. */
4221 case R_PPC_SECTOFF:
4222 case R_PPC_SECTOFF_LO:
4223 case R_PPC_SECTOFF_HI:
4224 case R_PPC_SECTOFF_HA:
4225 case R_PPC_DTPREL16:
4226 case R_PPC_DTPREL16_LO:
4227 case R_PPC_DTPREL16_HI:
4228 case R_PPC_DTPREL16_HA:
4229 case R_PPC_TOC16:
4230 break;
4231
4232 case R_PPC_REL16:
4233 case R_PPC_REL16_LO:
4234 case R_PPC_REL16_HI:
4235 case R_PPC_REL16_HA:
4236 ppc_elf_tdata (abfd)->has_rel16 = 1;
4237 break;
4238
4239 /* These are just markers. */
4240 case R_PPC_TLS:
4241 case R_PPC_EMB_MRKREF:
4242 case R_PPC_NONE:
4243 case R_PPC_max:
4244 case R_PPC_RELAX:
4245 case R_PPC_RELAX_PLT:
4246 case R_PPC_RELAX_PLTREL24:
4247 break;
4248
4249 /* These should only appear in dynamic objects. */
4250 case R_PPC_COPY:
4251 case R_PPC_GLOB_DAT:
4252 case R_PPC_JMP_SLOT:
4253 case R_PPC_RELATIVE:
4254 case R_PPC_IRELATIVE:
4255 break;
4256
4257 /* These aren't handled yet. We'll report an error later. */
4258 case R_PPC_ADDR30:
4259 case R_PPC_EMB_RELSEC16:
4260 case R_PPC_EMB_RELST_LO:
4261 case R_PPC_EMB_RELST_HI:
4262 case R_PPC_EMB_RELST_HA:
4263 case R_PPC_EMB_BIT_FLD:
4264 break;
4265
4266 /* This refers only to functions defined in the shared library. */
4267 case R_PPC_LOCAL24PC:
4268 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4269 {
4270 htab->plt_type = PLT_OLD;
4271 htab->old_bfd = abfd;
4272 }
4273 if (h != NULL && h->type == STT_GNU_IFUNC)
4274 {
4275 if (info->shared)
4276 {
4277 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4278 abfd, sec, rel->r_offset,
4279 h->root.root.string);
4280 bfd_set_error (bfd_error_bad_value);
4281 return FALSE;
4282 }
4283 h->needs_plt = 1;
4284 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4285 return FALSE;
4286 }
4287 break;
4288
4289 /* This relocation describes the C++ object vtable hierarchy.
4290 Reconstruct it for later use during GC. */
4291 case R_PPC_GNU_VTINHERIT:
4292 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4293 return FALSE;
4294 break;
4295
4296 /* This relocation describes which C++ vtable entries are actually
4297 used. Record for later use during GC. */
4298 case R_PPC_GNU_VTENTRY:
4299 BFD_ASSERT (h != NULL);
4300 if (h != NULL
4301 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4302 return FALSE;
4303 break;
4304
4305 /* We shouldn't really be seeing these. */
4306 case R_PPC_TPREL32:
4307 case R_PPC_TPREL16:
4308 case R_PPC_TPREL16_LO:
4309 case R_PPC_TPREL16_HI:
4310 case R_PPC_TPREL16_HA:
4311 if (!info->executable)
4312 info->flags |= DF_STATIC_TLS;
4313 goto dodyn;
4314
4315 /* Nor these. */
4316 case R_PPC_DTPMOD32:
4317 case R_PPC_DTPREL32:
4318 goto dodyn;
4319
4320 case R_PPC_REL32:
4321 if (h == NULL
4322 && got2 != NULL
4323 && (sec->flags & SEC_CODE) != 0
4324 && info->shared
4325 && htab->plt_type == PLT_UNSET)
4326 {
4327 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4328 the start of a function, which assembles to a REL32
4329 reference to .got2. If we detect one of these, then
4330 force the old PLT layout because the linker cannot
4331 reliably deduce the GOT pointer value needed for
4332 PLT call stubs. */
4333 asection *s;
4334 Elf_Internal_Sym *isym;
4335
4336 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4337 abfd, r_symndx);
4338 if (isym == NULL)
4339 return FALSE;
4340
4341 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4342 if (s == got2)
4343 {
4344 htab->plt_type = PLT_OLD;
4345 htab->old_bfd = abfd;
4346 }
4347 }
4348 if (h == NULL || h == htab->elf.hgot)
4349 break;
4350 /* fall through */
4351
4352 case R_PPC_ADDR32:
4353 case R_PPC_ADDR16:
4354 case R_PPC_ADDR16_LO:
4355 case R_PPC_ADDR16_HI:
4356 case R_PPC_ADDR16_HA:
4357 case R_PPC_UADDR32:
4358 case R_PPC_UADDR16:
4359 if (h != NULL && !info->shared)
4360 {
4361 /* We may need a plt entry if the symbol turns out to be
4362 a function defined in a dynamic object. */
4363 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4364 return FALSE;
4365
4366 /* We may need a copy reloc too. */
4367 h->non_got_ref = 1;
4368 h->pointer_equality_needed = 1;
4369 }
4370 goto dodyn;
4371
4372 case R_PPC_REL24:
4373 case R_PPC_REL14:
4374 case R_PPC_REL14_BRTAKEN:
4375 case R_PPC_REL14_BRNTAKEN:
4376 if (h == NULL)
4377 break;
4378 if (h == htab->elf.hgot)
4379 {
4380 if (htab->plt_type == PLT_UNSET)
4381 {
4382 htab->plt_type = PLT_OLD;
4383 htab->old_bfd = abfd;
4384 }
4385 break;
4386 }
4387 /* fall through */
4388
4389 case R_PPC_ADDR24:
4390 case R_PPC_ADDR14:
4391 case R_PPC_ADDR14_BRTAKEN:
4392 case R_PPC_ADDR14_BRNTAKEN:
4393 if (h != NULL && !info->shared)
4394 {
4395 /* We may need a plt entry if the symbol turns out to be
4396 a function defined in a dynamic object. */
4397 h->needs_plt = 1;
4398 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4399 return FALSE;
4400 break;
4401 }
4402
4403 dodyn:
4404 /* If we are creating a shared library, and this is a reloc
4405 against a global symbol, or a non PC relative reloc
4406 against a local symbol, then we need to copy the reloc
4407 into the shared library. However, if we are linking with
4408 -Bsymbolic, we do not need to copy a reloc against a
4409 global symbol which is defined in an object we are
4410 including in the link (i.e., DEF_REGULAR is set). At
4411 this point we have not seen all the input files, so it is
4412 possible that DEF_REGULAR is not set now but will be set
4413 later (it is never cleared). In case of a weak definition,
4414 DEF_REGULAR may be cleared later by a strong definition in
4415 a shared library. We account for that possibility below by
4416 storing information in the dyn_relocs field of the hash
4417 table entry. A similar situation occurs when creating
4418 shared libraries and symbol visibility changes render the
4419 symbol local.
4420
4421 If on the other hand, we are creating an executable, we
4422 may need to keep relocations for symbols satisfied by a
4423 dynamic library if we manage to avoid copy relocs for the
4424 symbol. */
4425 if ((info->shared
4426 && (must_be_dyn_reloc (info, r_type)
4427 || (h != NULL
4428 && (!SYMBOLIC_BIND (info, h)
4429 || h->root.type == bfd_link_hash_defweak
4430 || !h->def_regular))))
4431 || (ELIMINATE_COPY_RELOCS
4432 && !info->shared
4433 && h != NULL
4434 && (h->root.type == bfd_link_hash_defweak
4435 || !h->def_regular)))
4436 {
4437 #ifdef DEBUG
4438 fprintf (stderr,
4439 "ppc_elf_check_relocs needs to "
4440 "create relocation for %s\n",
4441 (h && h->root.root.string
4442 ? h->root.root.string : "<unknown>"));
4443 #endif
4444 if (sreloc == NULL)
4445 {
4446 if (htab->elf.dynobj == NULL)
4447 htab->elf.dynobj = abfd;
4448
4449 sreloc = _bfd_elf_make_dynamic_reloc_section
4450 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4451
4452 if (sreloc == NULL)
4453 return FALSE;
4454 }
4455
4456 /* If this is a global symbol, we count the number of
4457 relocations we need for this symbol. */
4458 if (h != NULL)
4459 {
4460 struct elf_dyn_relocs *p;
4461 struct elf_dyn_relocs **rel_head;
4462
4463 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4464 p = *rel_head;
4465 if (p == NULL || p->sec != sec)
4466 {
4467 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4468 if (p == NULL)
4469 return FALSE;
4470 p->next = *rel_head;
4471 *rel_head = p;
4472 p->sec = sec;
4473 p->count = 0;
4474 p->pc_count = 0;
4475 }
4476 p->count += 1;
4477 if (!must_be_dyn_reloc (info, r_type))
4478 p->pc_count += 1;
4479 }
4480 else
4481 {
4482 /* Track dynamic relocs needed for local syms too.
4483 We really need local syms available to do this
4484 easily. Oh well. */
4485 struct ppc_dyn_relocs *p;
4486 struct ppc_dyn_relocs **rel_head;
4487 bfd_boolean is_ifunc;
4488 asection *s;
4489 void *vpp;
4490 Elf_Internal_Sym *isym;
4491
4492 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4493 abfd, r_symndx);
4494 if (isym == NULL)
4495 return FALSE;
4496
4497 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4498 if (s == NULL)
4499 s = sec;
4500
4501 vpp = &elf_section_data (s)->local_dynrel;
4502 rel_head = (struct ppc_dyn_relocs **) vpp;
4503 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4504 p = *rel_head;
4505 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4506 p = p->next;
4507 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4508 {
4509 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4510 if (p == NULL)
4511 return FALSE;
4512 p->next = *rel_head;
4513 *rel_head = p;
4514 p->sec = sec;
4515 p->ifunc = is_ifunc;
4516 p->count = 0;
4517 }
4518 p->count += 1;
4519 }
4520 }
4521
4522 break;
4523 }
4524 }
4525
4526 return TRUE;
4527 }
4528 \f
4529
4530 /* Merge object attributes from IBFD into OBFD. Raise an error if
4531 there are conflicting attributes. */
4532 static bfd_boolean
4533 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4534 {
4535 obj_attribute *in_attr, *in_attrs;
4536 obj_attribute *out_attr, *out_attrs;
4537
4538 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4539 {
4540 /* This is the first object. Copy the attributes. */
4541 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4542
4543 /* Use the Tag_null value to indicate the attributes have been
4544 initialized. */
4545 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4546
4547 return TRUE;
4548 }
4549
4550 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4551 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4552
4553 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4554 non-conflicting ones. */
4555 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4556 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4557 if (in_attr->i != out_attr->i)
4558 {
4559 out_attr->type = 1;
4560 if (out_attr->i == 0)
4561 out_attr->i = in_attr->i;
4562 else if (in_attr->i == 0)
4563 ;
4564 else if (out_attr->i == 1 && in_attr->i == 2)
4565 _bfd_error_handler
4566 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4567 else if (out_attr->i == 1 && in_attr->i == 3)
4568 _bfd_error_handler
4569 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4570 obfd, ibfd);
4571 else if (out_attr->i == 3 && in_attr->i == 1)
4572 _bfd_error_handler
4573 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4574 ibfd, obfd);
4575 else if (out_attr->i == 3 && in_attr->i == 2)
4576 _bfd_error_handler
4577 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4578 ibfd, obfd);
4579 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4580 _bfd_error_handler
4581 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4582 else if (in_attr->i > 3)
4583 _bfd_error_handler
4584 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4585 in_attr->i);
4586 else
4587 _bfd_error_handler
4588 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4589 out_attr->i);
4590 }
4591
4592 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4593 merge non-conflicting ones. */
4594 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4595 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4596 if (in_attr->i != out_attr->i)
4597 {
4598 const char *in_abi = NULL, *out_abi = NULL;
4599
4600 switch (in_attr->i)
4601 {
4602 case 1: in_abi = "generic"; break;
4603 case 2: in_abi = "AltiVec"; break;
4604 case 3: in_abi = "SPE"; break;
4605 }
4606
4607 switch (out_attr->i)
4608 {
4609 case 1: out_abi = "generic"; break;
4610 case 2: out_abi = "AltiVec"; break;
4611 case 3: out_abi = "SPE"; break;
4612 }
4613
4614 out_attr->type = 1;
4615 if (out_attr->i == 0)
4616 out_attr->i = in_attr->i;
4617 else if (in_attr->i == 0)
4618 ;
4619 /* For now, allow generic to transition to AltiVec or SPE
4620 without a warning. If GCC marked files with their stack
4621 alignment and used don't-care markings for files which are
4622 not affected by the vector ABI, we could warn about this
4623 case too. */
4624 else if (out_attr->i == 1)
4625 out_attr->i = in_attr->i;
4626 else if (in_attr->i == 1)
4627 ;
4628 else if (in_abi == NULL)
4629 _bfd_error_handler
4630 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4631 in_attr->i);
4632 else if (out_abi == NULL)
4633 _bfd_error_handler
4634 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4635 in_attr->i);
4636 else
4637 _bfd_error_handler
4638 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4639 ibfd, obfd, in_abi, out_abi);
4640 }
4641
4642 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4643 and merge non-conflicting ones. */
4644 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4645 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4646 if (in_attr->i != out_attr->i)
4647 {
4648 out_attr->type = 1;
4649 if (out_attr->i == 0)
4650 out_attr->i = in_attr->i;
4651 else if (in_attr->i == 0)
4652 ;
4653 else if (out_attr->i == 1 && in_attr->i == 2)
4654 _bfd_error_handler
4655 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4656 else if (out_attr->i == 2 && in_attr->i == 1)
4657 _bfd_error_handler
4658 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4659 else if (in_attr->i > 2)
4660 _bfd_error_handler
4661 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4662 in_attr->i);
4663 else
4664 _bfd_error_handler
4665 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4666 out_attr->i);
4667 }
4668
4669 /* Merge Tag_compatibility attributes and any common GNU ones. */
4670 _bfd_elf_merge_object_attributes (ibfd, obfd);
4671
4672 return TRUE;
4673 }
4674
4675 /* Merge backend specific data from an object file to the output
4676 object file when linking. */
4677
4678 static bfd_boolean
4679 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4680 {
4681 flagword old_flags;
4682 flagword new_flags;
4683 bfd_boolean error;
4684
4685 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4686 return TRUE;
4687
4688 /* Check if we have the same endianness. */
4689 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4690 return FALSE;
4691
4692 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4693 return FALSE;
4694
4695 new_flags = elf_elfheader (ibfd)->e_flags;
4696 old_flags = elf_elfheader (obfd)->e_flags;
4697 if (!elf_flags_init (obfd))
4698 {
4699 /* First call, no flags set. */
4700 elf_flags_init (obfd) = TRUE;
4701 elf_elfheader (obfd)->e_flags = new_flags;
4702 }
4703
4704 /* Compatible flags are ok. */
4705 else if (new_flags == old_flags)
4706 ;
4707
4708 /* Incompatible flags. */
4709 else
4710 {
4711 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4712 to be linked with either. */
4713 error = FALSE;
4714 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4715 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4716 {
4717 error = TRUE;
4718 (*_bfd_error_handler)
4719 (_("%B: compiled with -mrelocatable and linked with "
4720 "modules compiled normally"), ibfd);
4721 }
4722 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4723 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4724 {
4725 error = TRUE;
4726 (*_bfd_error_handler)
4727 (_("%B: compiled normally and linked with "
4728 "modules compiled with -mrelocatable"), ibfd);
4729 }
4730
4731 /* The output is -mrelocatable-lib iff both the input files are. */
4732 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4733 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4734
4735 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4736 but each input file is either -mrelocatable or -mrelocatable-lib. */
4737 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4738 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4739 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4740 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4741
4742 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4743 any module uses it. */
4744 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4745
4746 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4747 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4748
4749 /* Warn about any other mismatches. */
4750 if (new_flags != old_flags)
4751 {
4752 error = TRUE;
4753 (*_bfd_error_handler)
4754 (_("%B: uses different e_flags (0x%lx) fields "
4755 "than previous modules (0x%lx)"),
4756 ibfd, (long) new_flags, (long) old_flags);
4757 }
4758
4759 if (error)
4760 {
4761 bfd_set_error (bfd_error_bad_value);
4762 return FALSE;
4763 }
4764 }
4765
4766 return TRUE;
4767 }
4768
4769 static void
4770 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4771 bfd_vma value,
4772 split16_format_type split16_format)
4773
4774 {
4775 unsigned int insn, top5;
4776
4777 insn = bfd_get_32 (output_bfd, loc);
4778 top5 = value & 0xf800;
4779 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4780 insn |= top5;
4781 insn |= value & 0x7ff;
4782 bfd_put_32 (output_bfd, insn, loc);
4783 }
4784
4785 \f
4786 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4787 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4788 int
4789 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4790 struct bfd_link_info *info)
4791 {
4792 struct ppc_elf_link_hash_table *htab;
4793 flagword flags;
4794
4795 htab = ppc_elf_hash_table (info);
4796
4797 if (htab->plt_type == PLT_UNSET)
4798 {
4799 struct elf_link_hash_entry *h;
4800
4801 if (htab->params->plt_style == PLT_OLD)
4802 htab->plt_type = PLT_OLD;
4803 else if (info->shared
4804 && htab->elf.dynamic_sections_created
4805 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4806 FALSE, FALSE, TRUE)) != NULL
4807 && (h->type == STT_FUNC
4808 || h->needs_plt)
4809 && h->ref_regular
4810 && !(SYMBOL_CALLS_LOCAL (info, h)
4811 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4812 && h->root.type == bfd_link_hash_undefweak)))
4813 {
4814 /* Profiling of shared libs (and pies) is not supported with
4815 secure plt, because ppc32 does profiling before a
4816 function prologue and a secure plt pic call stubs needs
4817 r30 to be set up. */
4818 htab->plt_type = PLT_OLD;
4819 }
4820 else
4821 {
4822 bfd *ibfd;
4823 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4824
4825 /* Look through the reloc flags left by ppc_elf_check_relocs.
4826 Use the old style bss plt if a file makes plt calls
4827 without using the new relocs, and if ld isn't given
4828 --secure-plt and we never see REL16 relocs. */
4829 if (plt_type == PLT_UNSET)
4830 plt_type = PLT_OLD;
4831 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4832 if (is_ppc_elf (ibfd))
4833 {
4834 if (ppc_elf_tdata (ibfd)->has_rel16)
4835 plt_type = PLT_NEW;
4836 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4837 {
4838 plt_type = PLT_OLD;
4839 htab->old_bfd = ibfd;
4840 break;
4841 }
4842 }
4843 htab->plt_type = plt_type;
4844 }
4845 }
4846 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4847 {
4848 if (htab->old_bfd != NULL)
4849 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4850 htab->old_bfd);
4851 else
4852 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4853 }
4854
4855 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4856
4857 if (htab->plt_type == PLT_NEW)
4858 {
4859 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4861
4862 /* The new PLT is a loaded section. */
4863 if (htab->plt != NULL
4864 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4865 return -1;
4866
4867 /* The new GOT is not executable. */
4868 if (htab->got != NULL
4869 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4870 return -1;
4871 }
4872 else
4873 {
4874 /* Stop an unused .glink section from affecting .text alignment. */
4875 if (htab->glink != NULL
4876 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4877 return -1;
4878 }
4879 return htab->plt_type == PLT_NEW;
4880 }
4881 \f
4882 /* Return the section that should be marked against GC for a given
4883 relocation. */
4884
4885 static asection *
4886 ppc_elf_gc_mark_hook (asection *sec,
4887 struct bfd_link_info *info,
4888 Elf_Internal_Rela *rel,
4889 struct elf_link_hash_entry *h,
4890 Elf_Internal_Sym *sym)
4891 {
4892 if (h != NULL)
4893 switch (ELF32_R_TYPE (rel->r_info))
4894 {
4895 case R_PPC_GNU_VTINHERIT:
4896 case R_PPC_GNU_VTENTRY:
4897 return NULL;
4898 }
4899
4900 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4901 }
4902
4903 /* Update the got, plt and dynamic reloc reference counts for the
4904 section being removed. */
4905
4906 static bfd_boolean
4907 ppc_elf_gc_sweep_hook (bfd *abfd,
4908 struct bfd_link_info *info,
4909 asection *sec,
4910 const Elf_Internal_Rela *relocs)
4911 {
4912 struct ppc_elf_link_hash_table *htab;
4913 Elf_Internal_Shdr *symtab_hdr;
4914 struct elf_link_hash_entry **sym_hashes;
4915 bfd_signed_vma *local_got_refcounts;
4916 const Elf_Internal_Rela *rel, *relend;
4917 asection *got2;
4918
4919 if (info->relocatable)
4920 return TRUE;
4921
4922 if ((sec->flags & SEC_ALLOC) == 0)
4923 return TRUE;
4924
4925 elf_section_data (sec)->local_dynrel = NULL;
4926
4927 htab = ppc_elf_hash_table (info);
4928 symtab_hdr = &elf_symtab_hdr (abfd);
4929 sym_hashes = elf_sym_hashes (abfd);
4930 local_got_refcounts = elf_local_got_refcounts (abfd);
4931 got2 = bfd_get_section_by_name (abfd, ".got2");
4932
4933 relend = relocs + sec->reloc_count;
4934 for (rel = relocs; rel < relend; rel++)
4935 {
4936 unsigned long r_symndx;
4937 enum elf_ppc_reloc_type r_type;
4938 struct elf_link_hash_entry *h = NULL;
4939
4940 r_symndx = ELF32_R_SYM (rel->r_info);
4941 if (r_symndx >= symtab_hdr->sh_info)
4942 {
4943 struct elf_dyn_relocs **pp, *p;
4944 struct ppc_elf_link_hash_entry *eh;
4945
4946 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4947 while (h->root.type == bfd_link_hash_indirect
4948 || h->root.type == bfd_link_hash_warning)
4949 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4950 eh = (struct ppc_elf_link_hash_entry *) h;
4951
4952 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4953 if (p->sec == sec)
4954 {
4955 /* Everything must go for SEC. */
4956 *pp = p->next;
4957 break;
4958 }
4959 }
4960
4961 r_type = ELF32_R_TYPE (rel->r_info);
4962 if (!htab->is_vxworks
4963 && h == NULL
4964 && local_got_refcounts != NULL
4965 && (!info->shared
4966 || is_branch_reloc (r_type)))
4967 {
4968 struct plt_entry **local_plt = (struct plt_entry **)
4969 (local_got_refcounts + symtab_hdr->sh_info);
4970 char *local_got_tls_masks = (char *)
4971 (local_plt + symtab_hdr->sh_info);
4972 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4973 {
4974 struct plt_entry **ifunc = local_plt + r_symndx;
4975 bfd_vma addend = 0;
4976 struct plt_entry *ent;
4977
4978 if (r_type == R_PPC_PLTREL24 && info->shared)
4979 addend = rel->r_addend;
4980 ent = find_plt_ent (ifunc, got2, addend);
4981 if (ent->plt.refcount > 0)
4982 ent->plt.refcount -= 1;
4983 continue;
4984 }
4985 }
4986
4987 switch (r_type)
4988 {
4989 case R_PPC_GOT_TLSLD16:
4990 case R_PPC_GOT_TLSLD16_LO:
4991 case R_PPC_GOT_TLSLD16_HI:
4992 case R_PPC_GOT_TLSLD16_HA:
4993 case R_PPC_GOT_TLSGD16:
4994 case R_PPC_GOT_TLSGD16_LO:
4995 case R_PPC_GOT_TLSGD16_HI:
4996 case R_PPC_GOT_TLSGD16_HA:
4997 case R_PPC_GOT_TPREL16:
4998 case R_PPC_GOT_TPREL16_LO:
4999 case R_PPC_GOT_TPREL16_HI:
5000 case R_PPC_GOT_TPREL16_HA:
5001 case R_PPC_GOT_DTPREL16:
5002 case R_PPC_GOT_DTPREL16_LO:
5003 case R_PPC_GOT_DTPREL16_HI:
5004 case R_PPC_GOT_DTPREL16_HA:
5005 case R_PPC_GOT16:
5006 case R_PPC_GOT16_LO:
5007 case R_PPC_GOT16_HI:
5008 case R_PPC_GOT16_HA:
5009 if (h != NULL)
5010 {
5011 if (h->got.refcount > 0)
5012 h->got.refcount--;
5013 if (!info->shared)
5014 {
5015 struct plt_entry *ent;
5016
5017 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5018 if (ent != NULL && ent->plt.refcount > 0)
5019 ent->plt.refcount -= 1;
5020 }
5021 }
5022 else if (local_got_refcounts != NULL)
5023 {
5024 if (local_got_refcounts[r_symndx] > 0)
5025 local_got_refcounts[r_symndx]--;
5026 }
5027 break;
5028
5029 case R_PPC_REL24:
5030 case R_PPC_REL14:
5031 case R_PPC_REL14_BRTAKEN:
5032 case R_PPC_REL14_BRNTAKEN:
5033 case R_PPC_REL32:
5034 if (h == NULL || h == htab->elf.hgot)
5035 break;
5036 /* Fall thru */
5037
5038 case R_PPC_ADDR32:
5039 case R_PPC_ADDR24:
5040 case R_PPC_ADDR16:
5041 case R_PPC_ADDR16_LO:
5042 case R_PPC_ADDR16_HI:
5043 case R_PPC_ADDR16_HA:
5044 case R_PPC_ADDR14:
5045 case R_PPC_ADDR14_BRTAKEN:
5046 case R_PPC_ADDR14_BRNTAKEN:
5047 case R_PPC_UADDR32:
5048 case R_PPC_UADDR16:
5049 if (info->shared)
5050 break;
5051
5052 case R_PPC_PLT32:
5053 case R_PPC_PLTREL24:
5054 case R_PPC_PLTREL32:
5055 case R_PPC_PLT16_LO:
5056 case R_PPC_PLT16_HI:
5057 case R_PPC_PLT16_HA:
5058 if (h != NULL)
5059 {
5060 bfd_vma addend = 0;
5061 struct plt_entry *ent;
5062
5063 if (r_type == R_PPC_PLTREL24 && info->shared)
5064 addend = rel->r_addend;
5065 ent = find_plt_ent (&h->plt.plist, got2, addend);
5066 if (ent != NULL && ent->plt.refcount > 0)
5067 ent->plt.refcount -= 1;
5068 }
5069 break;
5070
5071 default:
5072 break;
5073 }
5074 }
5075 return TRUE;
5076 }
5077 \f
5078 /* Set plt output section type, htab->tls_get_addr, and call the
5079 generic ELF tls_setup function. */
5080
5081 asection *
5082 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5083 {
5084 struct ppc_elf_link_hash_table *htab;
5085
5086 htab = ppc_elf_hash_table (info);
5087 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5088 FALSE, FALSE, TRUE);
5089 if (!htab->params->no_tls_get_addr_opt)
5090 {
5091 struct elf_link_hash_entry *opt, *tga;
5092 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5093 FALSE, FALSE, TRUE);
5094 if (opt != NULL
5095 && (opt->root.type == bfd_link_hash_defined
5096 || opt->root.type == bfd_link_hash_defweak))
5097 {
5098 /* If glibc supports an optimized __tls_get_addr call stub,
5099 signalled by the presence of __tls_get_addr_opt, and we'll
5100 be calling __tls_get_addr via a plt call stub, then
5101 make __tls_get_addr point to __tls_get_addr_opt. */
5102 tga = htab->tls_get_addr;
5103 if (htab->elf.dynamic_sections_created
5104 && tga != NULL
5105 && (tga->type == STT_FUNC
5106 || tga->needs_plt)
5107 && !(SYMBOL_CALLS_LOCAL (info, tga)
5108 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5109 && tga->root.type == bfd_link_hash_undefweak)))
5110 {
5111 struct plt_entry *ent;
5112 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5113 if (ent->plt.refcount > 0)
5114 break;
5115 if (ent != NULL)
5116 {
5117 tga->root.type = bfd_link_hash_indirect;
5118 tga->root.u.i.link = &opt->root;
5119 ppc_elf_copy_indirect_symbol (info, opt, tga);
5120 if (opt->dynindx != -1)
5121 {
5122 /* Use __tls_get_addr_opt in dynamic relocations. */
5123 opt->dynindx = -1;
5124 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5125 opt->dynstr_index);
5126 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5127 return FALSE;
5128 }
5129 htab->tls_get_addr = opt;
5130 }
5131 }
5132 }
5133 else
5134 htab->params->no_tls_get_addr_opt = TRUE;
5135 }
5136 if (htab->plt_type == PLT_NEW
5137 && htab->plt != NULL
5138 && htab->plt->output_section != NULL)
5139 {
5140 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5141 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5142 }
5143
5144 return _bfd_elf_tls_setup (obfd, info);
5145 }
5146
5147 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5148 HASH. */
5149
5150 static bfd_boolean
5151 branch_reloc_hash_match (const bfd *ibfd,
5152 const Elf_Internal_Rela *rel,
5153 const struct elf_link_hash_entry *hash)
5154 {
5155 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5156 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5157 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5158
5159 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5160 {
5161 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5162 struct elf_link_hash_entry *h;
5163
5164 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5165 while (h->root.type == bfd_link_hash_indirect
5166 || h->root.type == bfd_link_hash_warning)
5167 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5168 if (h == hash)
5169 return TRUE;
5170 }
5171 return FALSE;
5172 }
5173
5174 /* Run through all the TLS relocs looking for optimization
5175 opportunities. */
5176
5177 bfd_boolean
5178 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5179 struct bfd_link_info *info)
5180 {
5181 bfd *ibfd;
5182 asection *sec;
5183 struct ppc_elf_link_hash_table *htab;
5184 int pass;
5185
5186 if (info->relocatable || !info->executable)
5187 return TRUE;
5188
5189 htab = ppc_elf_hash_table (info);
5190 if (htab == NULL)
5191 return FALSE;
5192
5193 /* Make two passes through the relocs. First time check that tls
5194 relocs involved in setting up a tls_get_addr call are indeed
5195 followed by such a call. If they are not, don't do any tls
5196 optimization. On the second pass twiddle tls_mask flags to
5197 notify relocate_section that optimization can be done, and
5198 adjust got and plt refcounts. */
5199 for (pass = 0; pass < 2; ++pass)
5200 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5201 {
5202 Elf_Internal_Sym *locsyms = NULL;
5203 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5204 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5205
5206 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5207 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5208 {
5209 Elf_Internal_Rela *relstart, *rel, *relend;
5210 int expecting_tls_get_addr = 0;
5211
5212 /* Read the relocations. */
5213 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5214 info->keep_memory);
5215 if (relstart == NULL)
5216 return FALSE;
5217
5218 relend = relstart + sec->reloc_count;
5219 for (rel = relstart; rel < relend; rel++)
5220 {
5221 enum elf_ppc_reloc_type r_type;
5222 unsigned long r_symndx;
5223 struct elf_link_hash_entry *h = NULL;
5224 char *tls_mask;
5225 char tls_set, tls_clear;
5226 bfd_boolean is_local;
5227 bfd_signed_vma *got_count;
5228
5229 r_symndx = ELF32_R_SYM (rel->r_info);
5230 if (r_symndx >= symtab_hdr->sh_info)
5231 {
5232 struct elf_link_hash_entry **sym_hashes;
5233
5234 sym_hashes = elf_sym_hashes (ibfd);
5235 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5236 while (h->root.type == bfd_link_hash_indirect
5237 || h->root.type == bfd_link_hash_warning)
5238 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5239 }
5240
5241 is_local = FALSE;
5242 if (h == NULL
5243 || !h->def_dynamic)
5244 is_local = TRUE;
5245
5246 r_type = ELF32_R_TYPE (rel->r_info);
5247 /* If this section has old-style __tls_get_addr calls
5248 without marker relocs, then check that each
5249 __tls_get_addr call reloc is preceded by a reloc
5250 that conceivably belongs to the __tls_get_addr arg
5251 setup insn. If we don't find matching arg setup
5252 relocs, don't do any tls optimization. */
5253 if (pass == 0
5254 && sec->has_tls_get_addr_call
5255 && h != NULL
5256 && h == htab->tls_get_addr
5257 && !expecting_tls_get_addr
5258 && is_branch_reloc (r_type))
5259 {
5260 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5261 "TLS optimization disabled\n",
5262 ibfd, sec, rel->r_offset);
5263 if (elf_section_data (sec)->relocs != relstart)
5264 free (relstart);
5265 return TRUE;
5266 }
5267
5268 expecting_tls_get_addr = 0;
5269 switch (r_type)
5270 {
5271 case R_PPC_GOT_TLSLD16:
5272 case R_PPC_GOT_TLSLD16_LO:
5273 expecting_tls_get_addr = 1;
5274 /* Fall thru */
5275
5276 case R_PPC_GOT_TLSLD16_HI:
5277 case R_PPC_GOT_TLSLD16_HA:
5278 /* These relocs should never be against a symbol
5279 defined in a shared lib. Leave them alone if
5280 that turns out to be the case. */
5281 if (!is_local)
5282 continue;
5283
5284 /* LD -> LE */
5285 tls_set = 0;
5286 tls_clear = TLS_LD;
5287 break;
5288
5289 case R_PPC_GOT_TLSGD16:
5290 case R_PPC_GOT_TLSGD16_LO:
5291 expecting_tls_get_addr = 1;
5292 /* Fall thru */
5293
5294 case R_PPC_GOT_TLSGD16_HI:
5295 case R_PPC_GOT_TLSGD16_HA:
5296 if (is_local)
5297 /* GD -> LE */
5298 tls_set = 0;
5299 else
5300 /* GD -> IE */
5301 tls_set = TLS_TLS | TLS_TPRELGD;
5302 tls_clear = TLS_GD;
5303 break;
5304
5305 case R_PPC_GOT_TPREL16:
5306 case R_PPC_GOT_TPREL16_LO:
5307 case R_PPC_GOT_TPREL16_HI:
5308 case R_PPC_GOT_TPREL16_HA:
5309 if (is_local)
5310 {
5311 /* IE -> LE */
5312 tls_set = 0;
5313 tls_clear = TLS_TPREL;
5314 break;
5315 }
5316 else
5317 continue;
5318
5319 case R_PPC_TLSGD:
5320 case R_PPC_TLSLD:
5321 expecting_tls_get_addr = 2;
5322 tls_set = 0;
5323 tls_clear = 0;
5324 break;
5325
5326 default:
5327 continue;
5328 }
5329
5330 if (pass == 0)
5331 {
5332 if (!expecting_tls_get_addr
5333 || (expecting_tls_get_addr == 1
5334 && !sec->has_tls_get_addr_call))
5335 continue;
5336
5337 if (rel + 1 < relend
5338 && branch_reloc_hash_match (ibfd, rel + 1,
5339 htab->tls_get_addr))
5340 continue;
5341
5342 /* Uh oh, we didn't find the expected call. We
5343 could just mark this symbol to exclude it
5344 from tls optimization but it's safer to skip
5345 the entire optimization. */
5346 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5347 "TLS optimization disabled\n"),
5348 ibfd, sec, rel->r_offset);
5349 if (elf_section_data (sec)->relocs != relstart)
5350 free (relstart);
5351 return TRUE;
5352 }
5353
5354 if (expecting_tls_get_addr)
5355 {
5356 struct plt_entry *ent;
5357 bfd_vma addend = 0;
5358
5359 if (info->shared
5360 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5361 addend = rel[1].r_addend;
5362 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5363 got2, addend);
5364 if (ent != NULL && ent->plt.refcount > 0)
5365 ent->plt.refcount -= 1;
5366
5367 if (expecting_tls_get_addr == 2)
5368 continue;
5369 }
5370
5371 if (h != NULL)
5372 {
5373 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5374 got_count = &h->got.refcount;
5375 }
5376 else
5377 {
5378 bfd_signed_vma *lgot_refs;
5379 struct plt_entry **local_plt;
5380 char *lgot_masks;
5381
5382 if (locsyms == NULL)
5383 {
5384 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5385 if (locsyms == NULL)
5386 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5387 symtab_hdr->sh_info,
5388 0, NULL, NULL, NULL);
5389 if (locsyms == NULL)
5390 {
5391 if (elf_section_data (sec)->relocs != relstart)
5392 free (relstart);
5393 return FALSE;
5394 }
5395 }
5396 lgot_refs = elf_local_got_refcounts (ibfd);
5397 if (lgot_refs == NULL)
5398 abort ();
5399 local_plt = (struct plt_entry **)
5400 (lgot_refs + symtab_hdr->sh_info);
5401 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5402 tls_mask = &lgot_masks[r_symndx];
5403 got_count = &lgot_refs[r_symndx];
5404 }
5405
5406 if (tls_set == 0)
5407 {
5408 /* We managed to get rid of a got entry. */
5409 if (*got_count > 0)
5410 *got_count -= 1;
5411 }
5412
5413 *tls_mask |= tls_set;
5414 *tls_mask &= ~tls_clear;
5415 }
5416
5417 if (elf_section_data (sec)->relocs != relstart)
5418 free (relstart);
5419 }
5420
5421 if (locsyms != NULL
5422 && (symtab_hdr->contents != (unsigned char *) locsyms))
5423 {
5424 if (!info->keep_memory)
5425 free (locsyms);
5426 else
5427 symtab_hdr->contents = (unsigned char *) locsyms;
5428 }
5429 }
5430 return TRUE;
5431 }
5432 \f
5433 /* Return true if we have dynamic relocs that apply to read-only sections. */
5434
5435 static bfd_boolean
5436 readonly_dynrelocs (struct elf_link_hash_entry *h)
5437 {
5438 struct elf_dyn_relocs *p;
5439
5440 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5441 {
5442 asection *s = p->sec->output_section;
5443
5444 if (s != NULL
5445 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5446 == (SEC_READONLY | SEC_ALLOC)))
5447 return TRUE;
5448 }
5449 return FALSE;
5450 }
5451
5452 /* Adjust a symbol defined by a dynamic object and referenced by a
5453 regular object. The current definition is in some section of the
5454 dynamic object, but we're not including those sections. We have to
5455 change the definition to something the rest of the link can
5456 understand. */
5457
5458 static bfd_boolean
5459 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5460 struct elf_link_hash_entry *h)
5461 {
5462 struct ppc_elf_link_hash_table *htab;
5463 asection *s;
5464
5465 #ifdef DEBUG
5466 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5467 h->root.root.string);
5468 #endif
5469
5470 /* Make sure we know what is going on here. */
5471 htab = ppc_elf_hash_table (info);
5472 BFD_ASSERT (htab->elf.dynobj != NULL
5473 && (h->needs_plt
5474 || h->type == STT_GNU_IFUNC
5475 || h->u.weakdef != NULL
5476 || (h->def_dynamic
5477 && h->ref_regular
5478 && !h->def_regular)));
5479
5480 /* Deal with function syms. */
5481 if (h->type == STT_FUNC
5482 || h->type == STT_GNU_IFUNC
5483 || h->needs_plt)
5484 {
5485 /* Clear procedure linkage table information for any symbol that
5486 won't need a .plt entry. */
5487 struct plt_entry *ent;
5488 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5489 if (ent->plt.refcount > 0)
5490 break;
5491 if (ent == NULL
5492 || (h->type != STT_GNU_IFUNC
5493 && (SYMBOL_CALLS_LOCAL (info, h)
5494 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5495 && h->root.type == bfd_link_hash_undefweak))))
5496 {
5497 /* A PLT entry is not required/allowed when:
5498
5499 1. We are not using ld.so; because then the PLT entry
5500 can't be set up, so we can't use one. In this case,
5501 ppc_elf_adjust_dynamic_symbol won't even be called.
5502
5503 2. GC has rendered the entry unused.
5504
5505 3. We know for certain that a call to this symbol
5506 will go to this object, or will remain undefined. */
5507 h->plt.plist = NULL;
5508 h->needs_plt = 0;
5509 }
5510 else
5511 {
5512 /* After adjust_dynamic_symbol, non_got_ref set in the
5513 non-shared case means that we have allocated space in
5514 .dynbss for the symbol and thus dyn_relocs for this
5515 symbol should be discarded.
5516 If we get here we know we are making a PLT entry for this
5517 symbol, and in an executable we'd normally resolve
5518 relocations against this symbol to the PLT entry. Allow
5519 dynamic relocs if the reference is weak, and the dynamic
5520 relocs will not cause text relocation. */
5521 if (!h->ref_regular_nonweak
5522 && h->non_got_ref
5523 && h->type != STT_GNU_IFUNC
5524 && !htab->is_vxworks
5525 && !ppc_elf_hash_entry (h)->has_sda_refs
5526 && !readonly_dynrelocs (h))
5527 h->non_got_ref = 0;
5528 }
5529 return TRUE;
5530 }
5531 else
5532 h->plt.plist = NULL;
5533
5534 /* If this is a weak symbol, and there is a real definition, the
5535 processor independent code will have arranged for us to see the
5536 real definition first, and we can just use the same value. */
5537 if (h->u.weakdef != NULL)
5538 {
5539 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5540 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5541 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5542 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5543 if (ELIMINATE_COPY_RELOCS)
5544 h->non_got_ref = h->u.weakdef->non_got_ref;
5545 return TRUE;
5546 }
5547
5548 /* This is a reference to a symbol defined by a dynamic object which
5549 is not a function. */
5550
5551 /* If we are creating a shared library, we must presume that the
5552 only references to the symbol are via the global offset table.
5553 For such cases we need not do anything here; the relocations will
5554 be handled correctly by relocate_section. */
5555 if (info->shared)
5556 return TRUE;
5557
5558 /* If there are no references to this symbol that do not use the
5559 GOT, we don't need to generate a copy reloc. */
5560 if (!h->non_got_ref)
5561 return TRUE;
5562
5563 /* If we didn't find any dynamic relocs in read-only sections, then
5564 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5565 We can't do this if there are any small data relocations. This
5566 doesn't work on VxWorks, where we can not have dynamic
5567 relocations (other than copy and jump slot relocations) in an
5568 executable. */
5569 if (ELIMINATE_COPY_RELOCS
5570 && !ppc_elf_hash_entry (h)->has_sda_refs
5571 && !htab->is_vxworks
5572 && !h->def_regular
5573 && !readonly_dynrelocs (h))
5574 {
5575 h->non_got_ref = 0;
5576 return TRUE;
5577 }
5578
5579 /* We must allocate the symbol in our .dynbss section, which will
5580 become part of the .bss section of the executable. There will be
5581 an entry for this symbol in the .dynsym section. The dynamic
5582 object will contain position independent code, so all references
5583 from the dynamic object to this symbol will go through the global
5584 offset table. The dynamic linker will use the .dynsym entry to
5585 determine the address it must put in the global offset table, so
5586 both the dynamic object and the regular object will refer to the
5587 same memory location for the variable.
5588
5589 Of course, if the symbol is referenced using SDAREL relocs, we
5590 must instead allocate it in .sbss. */
5591
5592 if (ppc_elf_hash_entry (h)->has_sda_refs)
5593 s = htab->dynsbss;
5594 else
5595 s = htab->dynbss;
5596 BFD_ASSERT (s != NULL);
5597
5598 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5599 copy the initial value out of the dynamic object and into the
5600 runtime process image. We need to remember the offset into the
5601 .rela.bss section we are going to use. */
5602 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5603 {
5604 asection *srel;
5605
5606 if (ppc_elf_hash_entry (h)->has_sda_refs)
5607 srel = htab->relsbss;
5608 else
5609 srel = htab->relbss;
5610 BFD_ASSERT (srel != NULL);
5611 srel->size += sizeof (Elf32_External_Rela);
5612 h->needs_copy = 1;
5613 }
5614
5615 return _bfd_elf_adjust_dynamic_copy (h, s);
5616 }
5617 \f
5618 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5619 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5620 specifying the addend on the plt relocation. For -fpic code, the sym
5621 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5622 xxxxxxxx.got2.plt_pic32.<callee>. */
5623
5624 static bfd_boolean
5625 add_stub_sym (struct plt_entry *ent,
5626 struct elf_link_hash_entry *h,
5627 struct bfd_link_info *info)
5628 {
5629 struct elf_link_hash_entry *sh;
5630 size_t len1, len2, len3;
5631 char *name;
5632 const char *stub;
5633 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5634
5635 if (info->shared)
5636 stub = ".plt_pic32.";
5637 else
5638 stub = ".plt_call32.";
5639
5640 len1 = strlen (h->root.root.string);
5641 len2 = strlen (stub);
5642 len3 = 0;
5643 if (ent->sec)
5644 len3 = strlen (ent->sec->name);
5645 name = bfd_malloc (len1 + len2 + len3 + 9);
5646 if (name == NULL)
5647 return FALSE;
5648 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5649 if (ent->sec)
5650 memcpy (name + 8, ent->sec->name, len3);
5651 memcpy (name + 8 + len3, stub, len2);
5652 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5653 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5654 if (sh == NULL)
5655 return FALSE;
5656 if (sh->root.type == bfd_link_hash_new)
5657 {
5658 sh->root.type = bfd_link_hash_defined;
5659 sh->root.u.def.section = htab->glink;
5660 sh->root.u.def.value = ent->glink_offset;
5661 sh->ref_regular = 1;
5662 sh->def_regular = 1;
5663 sh->ref_regular_nonweak = 1;
5664 sh->forced_local = 1;
5665 sh->non_elf = 0;
5666 }
5667 return TRUE;
5668 }
5669
5670 /* Allocate NEED contiguous space in .got, and return the offset.
5671 Handles allocation of the got header when crossing 32k. */
5672
5673 static bfd_vma
5674 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5675 {
5676 bfd_vma where;
5677 unsigned int max_before_header;
5678
5679 if (htab->plt_type == PLT_VXWORKS)
5680 {
5681 where = htab->got->size;
5682 htab->got->size += need;
5683 }
5684 else
5685 {
5686 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5687 if (need <= htab->got_gap)
5688 {
5689 where = max_before_header - htab->got_gap;
5690 htab->got_gap -= need;
5691 }
5692 else
5693 {
5694 if (htab->got->size + need > max_before_header
5695 && htab->got->size <= max_before_header)
5696 {
5697 htab->got_gap = max_before_header - htab->got->size;
5698 htab->got->size = max_before_header + htab->got_header_size;
5699 }
5700 where = htab->got->size;
5701 htab->got->size += need;
5702 }
5703 }
5704 return where;
5705 }
5706
5707 /* Allocate space in associated reloc sections for dynamic relocs. */
5708
5709 static bfd_boolean
5710 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5711 {
5712 struct bfd_link_info *info = inf;
5713 struct ppc_elf_link_hash_entry *eh;
5714 struct ppc_elf_link_hash_table *htab;
5715 struct elf_dyn_relocs *p;
5716
5717 if (h->root.type == bfd_link_hash_indirect)
5718 return TRUE;
5719
5720 htab = ppc_elf_hash_table (info);
5721 if (htab->elf.dynamic_sections_created
5722 || h->type == STT_GNU_IFUNC)
5723 {
5724 struct plt_entry *ent;
5725 bfd_boolean doneone = FALSE;
5726 bfd_vma plt_offset = 0, glink_offset = 0;
5727 bfd_boolean dyn;
5728
5729 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5730 if (ent->plt.refcount > 0)
5731 {
5732 /* Make sure this symbol is output as a dynamic symbol. */
5733 if (h->dynindx == -1
5734 && !h->forced_local
5735 && !h->def_regular
5736 && htab->elf.dynamic_sections_created)
5737 {
5738 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5739 return FALSE;
5740 }
5741
5742 dyn = htab->elf.dynamic_sections_created;
5743 if (info->shared
5744 || h->type == STT_GNU_IFUNC
5745 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5746 {
5747 asection *s = htab->plt;
5748 if (!dyn || h->dynindx == -1)
5749 s = htab->iplt;
5750
5751 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5752 {
5753 if (!doneone)
5754 {
5755 plt_offset = s->size;
5756 s->size += 4;
5757 }
5758 ent->plt.offset = plt_offset;
5759
5760 s = htab->glink;
5761 if (!doneone || info->shared)
5762 {
5763 glink_offset = s->size;
5764 s->size += GLINK_ENTRY_SIZE;
5765 if (h == htab->tls_get_addr
5766 && !htab->params->no_tls_get_addr_opt)
5767 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5768 }
5769 if (!doneone
5770 && !info->shared
5771 && h->def_dynamic
5772 && !h->def_regular)
5773 {
5774 h->root.u.def.section = s;
5775 h->root.u.def.value = glink_offset;
5776 }
5777 ent->glink_offset = glink_offset;
5778
5779 if (htab->params->emit_stub_syms
5780 && !add_stub_sym (ent, h, info))
5781 return FALSE;
5782 }
5783 else
5784 {
5785 if (!doneone)
5786 {
5787 /* If this is the first .plt entry, make room
5788 for the special first entry. */
5789 if (s->size == 0)
5790 s->size += htab->plt_initial_entry_size;
5791
5792 /* The PowerPC PLT is actually composed of two
5793 parts, the first part is 2 words (for a load
5794 and a jump), and then there is a remaining
5795 word available at the end. */
5796 plt_offset = (htab->plt_initial_entry_size
5797 + (htab->plt_slot_size
5798 * ((s->size
5799 - htab->plt_initial_entry_size)
5800 / htab->plt_entry_size)));
5801
5802 /* If this symbol is not defined in a regular
5803 file, and we are not generating a shared
5804 library, then set the symbol to this location
5805 in the .plt. This is to avoid text
5806 relocations, and is required to make
5807 function pointers compare as equal between
5808 the normal executable and the shared library. */
5809 if (! info->shared
5810 && h->def_dynamic
5811 && !h->def_regular)
5812 {
5813 h->root.u.def.section = s;
5814 h->root.u.def.value = plt_offset;
5815 }
5816
5817 /* Make room for this entry. */
5818 s->size += htab->plt_entry_size;
5819 /* After the 8192nd entry, room for two entries
5820 is allocated. */
5821 if (htab->plt_type == PLT_OLD
5822 && (s->size - htab->plt_initial_entry_size)
5823 / htab->plt_entry_size
5824 > PLT_NUM_SINGLE_ENTRIES)
5825 s->size += htab->plt_entry_size;
5826 }
5827 ent->plt.offset = plt_offset;
5828 }
5829
5830 /* We also need to make an entry in the .rela.plt section. */
5831 if (!doneone)
5832 {
5833 if (!htab->elf.dynamic_sections_created
5834 || h->dynindx == -1)
5835 htab->reliplt->size += sizeof (Elf32_External_Rela);
5836 else
5837 {
5838 htab->relplt->size += sizeof (Elf32_External_Rela);
5839
5840 if (htab->plt_type == PLT_VXWORKS)
5841 {
5842 /* Allocate space for the unloaded relocations. */
5843 if (!info->shared
5844 && htab->elf.dynamic_sections_created)
5845 {
5846 if (ent->plt.offset
5847 == (bfd_vma) htab->plt_initial_entry_size)
5848 {
5849 htab->srelplt2->size
5850 += (sizeof (Elf32_External_Rela)
5851 * VXWORKS_PLTRESOLVE_RELOCS);
5852 }
5853
5854 htab->srelplt2->size
5855 += (sizeof (Elf32_External_Rela)
5856 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5857 }
5858
5859 /* Every PLT entry has an associated GOT entry in
5860 .got.plt. */
5861 htab->sgotplt->size += 4;
5862 }
5863 }
5864 doneone = TRUE;
5865 }
5866 }
5867 else
5868 ent->plt.offset = (bfd_vma) -1;
5869 }
5870 else
5871 ent->plt.offset = (bfd_vma) -1;
5872
5873 if (!doneone)
5874 {
5875 h->plt.plist = NULL;
5876 h->needs_plt = 0;
5877 }
5878 }
5879 else
5880 {
5881 h->plt.plist = NULL;
5882 h->needs_plt = 0;
5883 }
5884
5885 eh = (struct ppc_elf_link_hash_entry *) h;
5886 if (eh->elf.got.refcount > 0)
5887 {
5888 bfd_boolean dyn;
5889 unsigned int need;
5890
5891 /* Make sure this symbol is output as a dynamic symbol. */
5892 if (eh->elf.dynindx == -1
5893 && !eh->elf.forced_local
5894 && eh->elf.type != STT_GNU_IFUNC
5895 && htab->elf.dynamic_sections_created)
5896 {
5897 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5898 return FALSE;
5899 }
5900
5901 need = 0;
5902 if ((eh->tls_mask & TLS_TLS) != 0)
5903 {
5904 if ((eh->tls_mask & TLS_LD) != 0)
5905 {
5906 if (!eh->elf.def_dynamic)
5907 /* We'll just use htab->tlsld_got.offset. This should
5908 always be the case. It's a little odd if we have
5909 a local dynamic reloc against a non-local symbol. */
5910 htab->tlsld_got.refcount += 1;
5911 else
5912 need += 8;
5913 }
5914 if ((eh->tls_mask & TLS_GD) != 0)
5915 need += 8;
5916 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5917 need += 4;
5918 if ((eh->tls_mask & TLS_DTPREL) != 0)
5919 need += 4;
5920 }
5921 else
5922 need += 4;
5923 if (need == 0)
5924 eh->elf.got.offset = (bfd_vma) -1;
5925 else
5926 {
5927 eh->elf.got.offset = allocate_got (htab, need);
5928 dyn = htab->elf.dynamic_sections_created;
5929 if ((info->shared
5930 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5931 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5932 || eh->elf.root.type != bfd_link_hash_undefweak))
5933 {
5934 asection *rsec = htab->relgot;
5935
5936 if (eh->elf.type == STT_GNU_IFUNC)
5937 rsec = htab->reliplt;
5938 /* All the entries we allocated need relocs.
5939 Except LD only needs one. */
5940 if ((eh->tls_mask & TLS_LD) != 0
5941 && eh->elf.def_dynamic)
5942 need -= 4;
5943 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5944 }
5945 }
5946 }
5947 else
5948 eh->elf.got.offset = (bfd_vma) -1;
5949
5950 if (eh->dyn_relocs == NULL
5951 || !htab->elf.dynamic_sections_created)
5952 return TRUE;
5953
5954 /* In the shared -Bsymbolic case, discard space allocated for
5955 dynamic pc-relative relocs against symbols which turn out to be
5956 defined in regular objects. For the normal shared case, discard
5957 space for relocs that have become local due to symbol visibility
5958 changes. */
5959
5960 if (info->shared)
5961 {
5962 /* Relocs that use pc_count are those that appear on a call insn,
5963 or certain REL relocs (see must_be_dyn_reloc) that can be
5964 generated via assembly. We want calls to protected symbols to
5965 resolve directly to the function rather than going via the plt.
5966 If people want function pointer comparisons to work as expected
5967 then they should avoid writing weird assembly. */
5968 if (SYMBOL_CALLS_LOCAL (info, h))
5969 {
5970 struct elf_dyn_relocs **pp;
5971
5972 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5973 {
5974 p->count -= p->pc_count;
5975 p->pc_count = 0;
5976 if (p->count == 0)
5977 *pp = p->next;
5978 else
5979 pp = &p->next;
5980 }
5981 }
5982
5983 if (htab->is_vxworks)
5984 {
5985 struct elf_dyn_relocs **pp;
5986
5987 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5988 {
5989 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5990 *pp = p->next;
5991 else
5992 pp = &p->next;
5993 }
5994 }
5995
5996 /* Discard relocs on undefined symbols that must be local. */
5997 if (eh->dyn_relocs != NULL
5998 && h->root.type == bfd_link_hash_undefined
5999 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6000 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6001 eh->dyn_relocs = NULL;
6002
6003 /* Also discard relocs on undefined weak syms with non-default
6004 visibility. */
6005 if (eh->dyn_relocs != NULL
6006 && h->root.type == bfd_link_hash_undefweak)
6007 {
6008 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6009 eh->dyn_relocs = NULL;
6010
6011 /* Make sure undefined weak symbols are output as a dynamic
6012 symbol in PIEs. */
6013 else if (h->dynindx == -1
6014 && !h->forced_local
6015 && !h->def_regular)
6016 {
6017 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6018 return FALSE;
6019 }
6020 }
6021 }
6022 else if (ELIMINATE_COPY_RELOCS)
6023 {
6024 /* For the non-shared case, discard space for relocs against
6025 symbols which turn out to need copy relocs or are not
6026 dynamic. */
6027
6028 if (!h->non_got_ref
6029 && !h->def_regular)
6030 {
6031 /* Make sure this symbol is output as a dynamic symbol.
6032 Undefined weak syms won't yet be marked as dynamic. */
6033 if (h->dynindx == -1
6034 && !h->forced_local)
6035 {
6036 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6037 return FALSE;
6038 }
6039
6040 /* If that succeeded, we know we'll be keeping all the
6041 relocs. */
6042 if (h->dynindx != -1)
6043 goto keep;
6044 }
6045
6046 eh->dyn_relocs = NULL;
6047
6048 keep: ;
6049 }
6050
6051 /* Finally, allocate space. */
6052 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6053 {
6054 asection *sreloc = elf_section_data (p->sec)->sreloc;
6055 if (eh->elf.type == STT_GNU_IFUNC)
6056 sreloc = htab->reliplt;
6057 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6058 }
6059
6060 return TRUE;
6061 }
6062
6063 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6064 read-only sections. */
6065
6066 static bfd_boolean
6067 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6068 {
6069 if (h->root.type == bfd_link_hash_indirect)
6070 return TRUE;
6071
6072 if (readonly_dynrelocs (h))
6073 {
6074 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6075
6076 /* Not an error, just cut short the traversal. */
6077 return FALSE;
6078 }
6079 return TRUE;
6080 }
6081
6082 static const unsigned char glink_eh_frame_cie[] =
6083 {
6084 0, 0, 0, 16, /* length. */
6085 0, 0, 0, 0, /* id. */
6086 1, /* CIE version. */
6087 'z', 'R', 0, /* Augmentation string. */
6088 4, /* Code alignment. */
6089 0x7c, /* Data alignment. */
6090 65, /* RA reg. */
6091 1, /* Augmentation size. */
6092 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6093 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6094 };
6095
6096 /* Set the sizes of the dynamic sections. */
6097
6098 static bfd_boolean
6099 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6100 struct bfd_link_info *info)
6101 {
6102 struct ppc_elf_link_hash_table *htab;
6103 asection *s;
6104 bfd_boolean relocs;
6105 bfd *ibfd;
6106
6107 #ifdef DEBUG
6108 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6109 #endif
6110
6111 htab = ppc_elf_hash_table (info);
6112 BFD_ASSERT (htab->elf.dynobj != NULL);
6113
6114 if (elf_hash_table (info)->dynamic_sections_created)
6115 {
6116 /* Set the contents of the .interp section to the interpreter. */
6117 if (info->executable)
6118 {
6119 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6120 BFD_ASSERT (s != NULL);
6121 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6122 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6123 }
6124 }
6125
6126 if (htab->plt_type == PLT_OLD)
6127 htab->got_header_size = 16;
6128 else if (htab->plt_type == PLT_NEW)
6129 htab->got_header_size = 12;
6130
6131 /* Set up .got offsets for local syms, and space for local dynamic
6132 relocs. */
6133 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6134 {
6135 bfd_signed_vma *local_got;
6136 bfd_signed_vma *end_local_got;
6137 struct plt_entry **local_plt;
6138 struct plt_entry **end_local_plt;
6139 char *lgot_masks;
6140 bfd_size_type locsymcount;
6141 Elf_Internal_Shdr *symtab_hdr;
6142
6143 if (!is_ppc_elf (ibfd))
6144 continue;
6145
6146 for (s = ibfd->sections; s != NULL; s = s->next)
6147 {
6148 struct ppc_dyn_relocs *p;
6149
6150 for (p = ((struct ppc_dyn_relocs *)
6151 elf_section_data (s)->local_dynrel);
6152 p != NULL;
6153 p = p->next)
6154 {
6155 if (!bfd_is_abs_section (p->sec)
6156 && bfd_is_abs_section (p->sec->output_section))
6157 {
6158 /* Input section has been discarded, either because
6159 it is a copy of a linkonce section or due to
6160 linker script /DISCARD/, so we'll be discarding
6161 the relocs too. */
6162 }
6163 else if (htab->is_vxworks
6164 && strcmp (p->sec->output_section->name,
6165 ".tls_vars") == 0)
6166 {
6167 /* Relocations in vxworks .tls_vars sections are
6168 handled specially by the loader. */
6169 }
6170 else if (p->count != 0)
6171 {
6172 asection *sreloc = elf_section_data (p->sec)->sreloc;
6173 if (p->ifunc)
6174 sreloc = htab->reliplt;
6175 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6176 if ((p->sec->output_section->flags
6177 & (SEC_READONLY | SEC_ALLOC))
6178 == (SEC_READONLY | SEC_ALLOC))
6179 info->flags |= DF_TEXTREL;
6180 }
6181 }
6182 }
6183
6184 local_got = elf_local_got_refcounts (ibfd);
6185 if (!local_got)
6186 continue;
6187
6188 symtab_hdr = &elf_symtab_hdr (ibfd);
6189 locsymcount = symtab_hdr->sh_info;
6190 end_local_got = local_got + locsymcount;
6191 local_plt = (struct plt_entry **) end_local_got;
6192 end_local_plt = local_plt + locsymcount;
6193 lgot_masks = (char *) end_local_plt;
6194
6195 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6196 if (*local_got > 0)
6197 {
6198 unsigned int need = 0;
6199 if ((*lgot_masks & TLS_TLS) != 0)
6200 {
6201 if ((*lgot_masks & TLS_GD) != 0)
6202 need += 8;
6203 if ((*lgot_masks & TLS_LD) != 0)
6204 htab->tlsld_got.refcount += 1;
6205 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6206 need += 4;
6207 if ((*lgot_masks & TLS_DTPREL) != 0)
6208 need += 4;
6209 }
6210 else
6211 need += 4;
6212 if (need == 0)
6213 *local_got = (bfd_vma) -1;
6214 else
6215 {
6216 *local_got = allocate_got (htab, need);
6217 if (info->shared)
6218 {
6219 asection *srel = htab->relgot;
6220 if ((*lgot_masks & PLT_IFUNC) != 0)
6221 srel = htab->reliplt;
6222 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6223 }
6224 }
6225 }
6226 else
6227 *local_got = (bfd_vma) -1;
6228
6229 if (htab->is_vxworks)
6230 continue;
6231
6232 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6233 for (; local_plt < end_local_plt; ++local_plt)
6234 {
6235 struct plt_entry *ent;
6236 bfd_boolean doneone = FALSE;
6237 bfd_vma plt_offset = 0, glink_offset = 0;
6238
6239 for (ent = *local_plt; ent != NULL; ent = ent->next)
6240 if (ent->plt.refcount > 0)
6241 {
6242 s = htab->iplt;
6243
6244 if (!doneone)
6245 {
6246 plt_offset = s->size;
6247 s->size += 4;
6248 }
6249 ent->plt.offset = plt_offset;
6250
6251 s = htab->glink;
6252 if (!doneone || info->shared)
6253 {
6254 glink_offset = s->size;
6255 s->size += GLINK_ENTRY_SIZE;
6256 }
6257 ent->glink_offset = glink_offset;
6258
6259 if (!doneone)
6260 {
6261 htab->reliplt->size += sizeof (Elf32_External_Rela);
6262 doneone = TRUE;
6263 }
6264 }
6265 else
6266 ent->plt.offset = (bfd_vma) -1;
6267 }
6268 }
6269
6270 /* Allocate space for global sym dynamic relocs. */
6271 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6272
6273 if (htab->tlsld_got.refcount > 0)
6274 {
6275 htab->tlsld_got.offset = allocate_got (htab, 8);
6276 if (info->shared)
6277 htab->relgot->size += sizeof (Elf32_External_Rela);
6278 }
6279 else
6280 htab->tlsld_got.offset = (bfd_vma) -1;
6281
6282 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6283 {
6284 unsigned int g_o_t = 32768;
6285
6286 /* If we haven't allocated the header, do so now. When we get here,
6287 for old plt/got the got size will be 0 to 32764 (not allocated),
6288 or 32780 to 65536 (header allocated). For new plt/got, the
6289 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6290 if (htab->got->size <= 32768)
6291 {
6292 g_o_t = htab->got->size;
6293 if (htab->plt_type == PLT_OLD)
6294 g_o_t += 4;
6295 htab->got->size += htab->got_header_size;
6296 }
6297
6298 htab->elf.hgot->root.u.def.value = g_o_t;
6299 }
6300 if (info->shared)
6301 {
6302 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6303
6304 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6305 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6306 }
6307
6308 if (htab->glink != NULL
6309 && htab->glink->size != 0
6310 && htab->elf.dynamic_sections_created)
6311 {
6312 htab->glink_pltresolve = htab->glink->size;
6313 /* Space for the branch table. */
6314 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6315 /* Pad out to align the start of PLTresolve. */
6316 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6317 ? 63 : 15);
6318 htab->glink->size += GLINK_PLTRESOLVE;
6319
6320 if (htab->params->emit_stub_syms)
6321 {
6322 struct elf_link_hash_entry *sh;
6323 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6324 TRUE, FALSE, FALSE);
6325 if (sh == NULL)
6326 return FALSE;
6327 if (sh->root.type == bfd_link_hash_new)
6328 {
6329 sh->root.type = bfd_link_hash_defined;
6330 sh->root.u.def.section = htab->glink;
6331 sh->root.u.def.value = htab->glink_pltresolve;
6332 sh->ref_regular = 1;
6333 sh->def_regular = 1;
6334 sh->ref_regular_nonweak = 1;
6335 sh->forced_local = 1;
6336 sh->non_elf = 0;
6337 }
6338 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6339 TRUE, FALSE, FALSE);
6340 if (sh == NULL)
6341 return FALSE;
6342 if (sh->root.type == bfd_link_hash_new)
6343 {
6344 sh->root.type = bfd_link_hash_defined;
6345 sh->root.u.def.section = htab->glink;
6346 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6347 sh->ref_regular = 1;
6348 sh->def_regular = 1;
6349 sh->ref_regular_nonweak = 1;
6350 sh->forced_local = 1;
6351 sh->non_elf = 0;
6352 }
6353 }
6354 }
6355
6356 if (htab->glink != NULL
6357 && htab->glink->size != 0
6358 && htab->glink_eh_frame != NULL
6359 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6360 && _bfd_elf_eh_frame_present (info))
6361 {
6362 s = htab->glink_eh_frame;
6363 s->size = sizeof (glink_eh_frame_cie) + 20;
6364 if (info->shared)
6365 {
6366 s->size += 4;
6367 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6368 s->size += 4;
6369 }
6370 }
6371
6372 /* We've now determined the sizes of the various dynamic sections.
6373 Allocate memory for them. */
6374 relocs = FALSE;
6375 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6376 {
6377 bfd_boolean strip_section = TRUE;
6378
6379 if ((s->flags & SEC_LINKER_CREATED) == 0)
6380 continue;
6381
6382 if (s == htab->plt
6383 || s == htab->got)
6384 {
6385 /* We'd like to strip these sections if they aren't needed, but if
6386 we've exported dynamic symbols from them we must leave them.
6387 It's too late to tell BFD to get rid of the symbols. */
6388 if (htab->elf.hplt != NULL)
6389 strip_section = FALSE;
6390 /* Strip this section if we don't need it; see the
6391 comment below. */
6392 }
6393 else if (s == htab->iplt
6394 || s == htab->glink
6395 || s == htab->glink_eh_frame
6396 || s == htab->sgotplt
6397 || s == htab->sbss
6398 || s == htab->dynbss
6399 || s == htab->dynsbss
6400 || s == htab->sdata[0].section
6401 || s == htab->sdata[1].section)
6402 {
6403 /* Strip these too. */
6404 }
6405 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6406 ".rela"))
6407 {
6408 if (s->size != 0)
6409 {
6410 /* Remember whether there are any relocation sections. */
6411 relocs = TRUE;
6412
6413 /* We use the reloc_count field as a counter if we need
6414 to copy relocs into the output file. */
6415 s->reloc_count = 0;
6416 }
6417 }
6418 else
6419 {
6420 /* It's not one of our sections, so don't allocate space. */
6421 continue;
6422 }
6423
6424 if (s->size == 0 && strip_section)
6425 {
6426 /* If we don't need this section, strip it from the
6427 output file. This is mostly to handle .rela.bss and
6428 .rela.plt. We must create both sections in
6429 create_dynamic_sections, because they must be created
6430 before the linker maps input sections to output
6431 sections. The linker does that before
6432 adjust_dynamic_symbol is called, and it is that
6433 function which decides whether anything needs to go
6434 into these sections. */
6435 s->flags |= SEC_EXCLUDE;
6436 continue;
6437 }
6438
6439 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6440 continue;
6441
6442 /* Allocate memory for the section contents. */
6443 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6444 if (s->contents == NULL)
6445 return FALSE;
6446 }
6447
6448 if (htab->elf.dynamic_sections_created)
6449 {
6450 /* Add some entries to the .dynamic section. We fill in the
6451 values later, in ppc_elf_finish_dynamic_sections, but we
6452 must add the entries now so that we get the correct size for
6453 the .dynamic section. The DT_DEBUG entry is filled in by the
6454 dynamic linker and used by the debugger. */
6455 #define add_dynamic_entry(TAG, VAL) \
6456 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6457
6458 if (info->executable)
6459 {
6460 if (!add_dynamic_entry (DT_DEBUG, 0))
6461 return FALSE;
6462 }
6463
6464 if (htab->plt != NULL && htab->plt->size != 0)
6465 {
6466 if (!add_dynamic_entry (DT_PLTGOT, 0)
6467 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6468 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6469 || !add_dynamic_entry (DT_JMPREL, 0))
6470 return FALSE;
6471 }
6472
6473 if (htab->plt_type == PLT_NEW
6474 && htab->glink != NULL
6475 && htab->glink->size != 0)
6476 {
6477 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6478 return FALSE;
6479 if (!htab->params->no_tls_get_addr_opt
6480 && htab->tls_get_addr != NULL
6481 && htab->tls_get_addr->plt.plist != NULL
6482 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6483 return FALSE;
6484 }
6485
6486 if (relocs)
6487 {
6488 if (!add_dynamic_entry (DT_RELA, 0)
6489 || !add_dynamic_entry (DT_RELASZ, 0)
6490 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6491 return FALSE;
6492 }
6493
6494 /* If any dynamic relocs apply to a read-only section, then we
6495 need a DT_TEXTREL entry. */
6496 if ((info->flags & DF_TEXTREL) == 0)
6497 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6498 info);
6499
6500 if ((info->flags & DF_TEXTREL) != 0)
6501 {
6502 if (!add_dynamic_entry (DT_TEXTREL, 0))
6503 return FALSE;
6504 }
6505 if (htab->is_vxworks
6506 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6507 return FALSE;
6508 }
6509 #undef add_dynamic_entry
6510
6511 if (htab->glink_eh_frame != NULL
6512 && htab->glink_eh_frame->contents != NULL)
6513 {
6514 unsigned char *p = htab->glink_eh_frame->contents;
6515 bfd_vma val;
6516
6517 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6518 /* CIE length (rewrite in case little-endian). */
6519 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6520 p += sizeof (glink_eh_frame_cie);
6521 /* FDE length. */
6522 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6523 bfd_put_32 (htab->elf.dynobj, val, p);
6524 p += 4;
6525 /* CIE pointer. */
6526 val = p - htab->glink_eh_frame->contents;
6527 bfd_put_32 (htab->elf.dynobj, val, p);
6528 p += 4;
6529 /* Offset to .glink. Set later. */
6530 p += 4;
6531 /* .glink size. */
6532 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6533 p += 4;
6534 /* Augmentation. */
6535 p += 1;
6536
6537 if (info->shared
6538 && htab->elf.dynamic_sections_created)
6539 {
6540 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6541 if (adv < 64)
6542 *p++ = DW_CFA_advance_loc + adv;
6543 else if (adv < 256)
6544 {
6545 *p++ = DW_CFA_advance_loc1;
6546 *p++ = adv;
6547 }
6548 else if (adv < 65536)
6549 {
6550 *p++ = DW_CFA_advance_loc2;
6551 bfd_put_16 (htab->elf.dynobj, adv, p);
6552 p += 2;
6553 }
6554 else
6555 {
6556 *p++ = DW_CFA_advance_loc4;
6557 bfd_put_32 (htab->elf.dynobj, adv, p);
6558 p += 4;
6559 }
6560 *p++ = DW_CFA_register;
6561 *p++ = 65;
6562 p++;
6563 *p++ = DW_CFA_advance_loc + 4;
6564 *p++ = DW_CFA_restore_extended;
6565 *p++ = 65;
6566 }
6567 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6568 == htab->glink_eh_frame->size);
6569 }
6570
6571 return TRUE;
6572 }
6573
6574 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6575 if it looks like nothing is using them. */
6576
6577 static void
6578 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6579 {
6580 struct elf_link_hash_entry *sda = lsect->sym;
6581
6582 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6583 {
6584 asection *s;
6585
6586 s = bfd_get_section_by_name (output_bfd, lsect->name);
6587 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6588 {
6589 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6590 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6591 {
6592 sda->def_regular = 0;
6593 /* This is somewhat magic. See elf_link_output_extsym. */
6594 sda->ref_dynamic = 1;
6595 sda->forced_local = 0;
6596 }
6597 }
6598 }
6599 }
6600
6601 void
6602 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6603 {
6604 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6605
6606 if (htab != NULL)
6607 {
6608 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6609 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6610 }
6611 }
6612
6613
6614 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6615
6616 static bfd_boolean
6617 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6618 {
6619 if (h->plt.plist != NULL
6620 && !h->def_regular
6621 && (!h->pointer_equality_needed
6622 || !h->ref_regular_nonweak))
6623 return FALSE;
6624
6625 return _bfd_elf_hash_symbol (h);
6626 }
6627 \f
6628 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6629
6630 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6631 used for some functions that are allowed to break the ABI). */
6632 static const int shared_stub_entry[] =
6633 {
6634 0x7c0802a6, /* mflr 0 */
6635 0x429f0005, /* bcl 20, 31, .Lxxx */
6636 0x7d8802a6, /* mflr 12 */
6637 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6638 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6639 0x7c0803a6, /* mtlr 0 */
6640 0x7d8903a6, /* mtctr 12 */
6641 0x4e800420, /* bctr */
6642 };
6643
6644 static const int stub_entry[] =
6645 {
6646 0x3d800000, /* lis 12,xxx@ha */
6647 0x398c0000, /* addi 12,12,xxx@l */
6648 0x7d8903a6, /* mtctr 12 */
6649 0x4e800420, /* bctr */
6650 };
6651
6652 struct ppc_elf_relax_info
6653 {
6654 unsigned int workaround_size;
6655 };
6656
6657 /* This function implements long branch trampolines, and the ppc476
6658 icache bug workaround. Any section needing trampolines or patch
6659 space for the workaround has its size extended so that we can
6660 add trampolines at the end of the section. */
6661
6662 static bfd_boolean
6663 ppc_elf_relax_section (bfd *abfd,
6664 asection *isec,
6665 struct bfd_link_info *link_info,
6666 bfd_boolean *again)
6667 {
6668 struct one_fixup
6669 {
6670 struct one_fixup *next;
6671 asection *tsec;
6672 /* Final link, can use the symbol offset. For a
6673 relocatable link we use the symbol's index. */
6674 bfd_vma toff;
6675 bfd_vma trampoff;
6676 };
6677
6678 Elf_Internal_Shdr *symtab_hdr;
6679 bfd_byte *contents = NULL;
6680 Elf_Internal_Sym *isymbuf = NULL;
6681 Elf_Internal_Rela *internal_relocs = NULL;
6682 Elf_Internal_Rela *irel, *irelend = NULL;
6683 struct one_fixup *fixups = NULL;
6684 struct ppc_elf_relax_info *relax_info = NULL;
6685 unsigned changes = 0;
6686 bfd_boolean workaround_change;
6687 struct ppc_elf_link_hash_table *htab;
6688 bfd_size_type trampbase, trampoff, newsize;
6689 asection *got2;
6690 bfd_boolean maybe_pasted;
6691
6692 *again = FALSE;
6693
6694 /* No need to do anything with non-alloc or non-code sections. */
6695 if ((isec->flags & SEC_ALLOC) == 0
6696 || (isec->flags & SEC_CODE) == 0
6697 || (isec->flags & SEC_LINKER_CREATED) != 0
6698 || isec->size < 4)
6699 return TRUE;
6700
6701 /* We cannot represent the required PIC relocs in the output, so don't
6702 do anything. The linker doesn't support mixing -shared and -r
6703 anyway. */
6704 if (link_info->relocatable && link_info->shared)
6705 return TRUE;
6706
6707 htab = ppc_elf_hash_table (link_info);
6708 if (htab == NULL)
6709 return TRUE;
6710
6711 isec->size = (isec->size + 3) & -4;
6712 if (isec->rawsize == 0)
6713 isec->rawsize = isec->size;
6714 trampbase = isec->size;
6715
6716 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6717 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6718 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6719
6720 if (htab->params->ppc476_workaround)
6721 {
6722 if (elf_section_data (isec)->sec_info == NULL)
6723 {
6724 elf_section_data (isec)->sec_info
6725 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6726 if (elf_section_data (isec)->sec_info == NULL)
6727 return FALSE;
6728 }
6729 relax_info = elf_section_data (isec)->sec_info;
6730 trampbase -= relax_info->workaround_size;
6731 }
6732
6733 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6734 || strcmp (isec->output_section->name, ".fini") == 0);
6735 /* Space for a branch around any trampolines. */
6736 trampoff = trampbase;
6737 if (maybe_pasted && trampbase == isec->rawsize)
6738 trampoff += 4;
6739
6740 symtab_hdr = &elf_symtab_hdr (abfd);
6741
6742 if (htab->params->branch_trampolines)
6743 {
6744 /* Get a copy of the native relocations. */
6745 if (isec->reloc_count != 0)
6746 {
6747 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6748 link_info->keep_memory);
6749 if (internal_relocs == NULL)
6750 goto error_return;
6751 }
6752
6753 got2 = bfd_get_section_by_name (abfd, ".got2");
6754
6755 irelend = internal_relocs + isec->reloc_count;
6756 for (irel = internal_relocs; irel < irelend; irel++)
6757 {
6758 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6759 bfd_vma toff, roff;
6760 asection *tsec;
6761 struct one_fixup *f;
6762 size_t insn_offset = 0;
6763 bfd_vma max_branch_offset, val;
6764 bfd_byte *hit_addr;
6765 unsigned long t0;
6766 struct elf_link_hash_entry *h;
6767 struct plt_entry **plist;
6768 unsigned char sym_type;
6769
6770 switch (r_type)
6771 {
6772 case R_PPC_REL24:
6773 case R_PPC_LOCAL24PC:
6774 case R_PPC_PLTREL24:
6775 max_branch_offset = 1 << 25;
6776 break;
6777
6778 case R_PPC_REL14:
6779 case R_PPC_REL14_BRTAKEN:
6780 case R_PPC_REL14_BRNTAKEN:
6781 max_branch_offset = 1 << 15;
6782 break;
6783
6784 default:
6785 continue;
6786 }
6787
6788 /* Get the value of the symbol referred to by the reloc. */
6789 h = NULL;
6790 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6791 {
6792 /* A local symbol. */
6793 Elf_Internal_Sym *isym;
6794
6795 /* Read this BFD's local symbols. */
6796 if (isymbuf == NULL)
6797 {
6798 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6799 if (isymbuf == NULL)
6800 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6801 symtab_hdr->sh_info, 0,
6802 NULL, NULL, NULL);
6803 if (isymbuf == 0)
6804 goto error_return;
6805 }
6806 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6807 if (isym->st_shndx == SHN_UNDEF)
6808 tsec = bfd_und_section_ptr;
6809 else if (isym->st_shndx == SHN_ABS)
6810 tsec = bfd_abs_section_ptr;
6811 else if (isym->st_shndx == SHN_COMMON)
6812 tsec = bfd_com_section_ptr;
6813 else
6814 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6815
6816 toff = isym->st_value;
6817 sym_type = ELF_ST_TYPE (isym->st_info);
6818 }
6819 else
6820 {
6821 /* Global symbol handling. */
6822 unsigned long indx;
6823
6824 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6825 h = elf_sym_hashes (abfd)[indx];
6826
6827 while (h->root.type == bfd_link_hash_indirect
6828 || h->root.type == bfd_link_hash_warning)
6829 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6830
6831 if (h->root.type == bfd_link_hash_defined
6832 || h->root.type == bfd_link_hash_defweak)
6833 {
6834 tsec = h->root.u.def.section;
6835 toff = h->root.u.def.value;
6836 }
6837 else if (h->root.type == bfd_link_hash_undefined
6838 || h->root.type == bfd_link_hash_undefweak)
6839 {
6840 tsec = bfd_und_section_ptr;
6841 toff = link_info->relocatable ? indx : 0;
6842 }
6843 else
6844 continue;
6845
6846 /* If this branch is to __tls_get_addr then we may later
6847 optimise away the call. We won't be needing a long-
6848 branch stub in that case. */
6849 if (link_info->executable
6850 && !link_info->relocatable
6851 && h == htab->tls_get_addr
6852 && irel != internal_relocs)
6853 {
6854 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6855 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6856 unsigned int tls_mask = 0;
6857
6858 /* The previous reloc should be one of R_PPC_TLSGD or
6859 R_PPC_TLSLD, or for older object files, a reloc
6860 on the __tls_get_addr arg setup insn. Get tls
6861 mask bits from the symbol on that reloc. */
6862 if (t_symndx < symtab_hdr->sh_info)
6863 {
6864 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6865
6866 if (local_got_offsets != NULL)
6867 {
6868 struct plt_entry **local_plt = (struct plt_entry **)
6869 (local_got_offsets + symtab_hdr->sh_info);
6870 char *lgot_masks = (char *)
6871 (local_plt + symtab_hdr->sh_info);
6872 tls_mask = lgot_masks[t_symndx];
6873 }
6874 }
6875 else
6876 {
6877 struct elf_link_hash_entry *th
6878 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6879
6880 while (th->root.type == bfd_link_hash_indirect
6881 || th->root.type == bfd_link_hash_warning)
6882 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6883
6884 tls_mask
6885 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6886 }
6887
6888 /* The mask bits tell us if the call will be
6889 optimised away. */
6890 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6891 && (t_rtype == R_PPC_TLSGD
6892 || t_rtype == R_PPC_GOT_TLSGD16
6893 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6894 continue;
6895 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6896 && (t_rtype == R_PPC_TLSLD
6897 || t_rtype == R_PPC_GOT_TLSLD16
6898 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6899 continue;
6900 }
6901
6902 sym_type = h->type;
6903 }
6904
6905 /* The condition here under which we call find_plt_ent must
6906 match that in relocate_section. If we call find_plt_ent here
6907 but not in relocate_section, or vice versa, then the branch
6908 destination used here may be incorrect. */
6909 plist = NULL;
6910 if (h != NULL)
6911 {
6912 /* We know is_branch_reloc (r_type) is true. */
6913 if (h->type == STT_GNU_IFUNC
6914 || r_type == R_PPC_PLTREL24)
6915 plist = &h->plt.plist;
6916 }
6917 else if (sym_type == STT_GNU_IFUNC
6918 && elf_local_got_offsets (abfd) != NULL)
6919 {
6920 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6921 struct plt_entry **local_plt = (struct plt_entry **)
6922 (local_got_offsets + symtab_hdr->sh_info);
6923 plist = local_plt + ELF32_R_SYM (irel->r_info);
6924 }
6925 if (plist != NULL)
6926 {
6927 bfd_vma addend = 0;
6928 struct plt_entry *ent;
6929
6930 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6931 addend = irel->r_addend;
6932 ent = find_plt_ent (plist, got2, addend);
6933 if (ent != NULL)
6934 {
6935 if (htab->plt_type == PLT_NEW
6936 || h == NULL
6937 || !htab->elf.dynamic_sections_created
6938 || h->dynindx == -1)
6939 {
6940 tsec = htab->glink;
6941 toff = ent->glink_offset;
6942 }
6943 else
6944 {
6945 tsec = htab->plt;
6946 toff = ent->plt.offset;
6947 }
6948 }
6949 }
6950
6951 /* If the branch and target are in the same section, you have
6952 no hope of adding stubs. We'll error out later should the
6953 branch overflow. */
6954 if (tsec == isec)
6955 continue;
6956
6957 /* There probably isn't any reason to handle symbols in
6958 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6959 attribute for a code section, and we are only looking at
6960 branches. However, implement it correctly here as a
6961 reference for other target relax_section functions. */
6962 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6963 {
6964 /* At this stage in linking, no SEC_MERGE symbol has been
6965 adjusted, so all references to such symbols need to be
6966 passed through _bfd_merged_section_offset. (Later, in
6967 relocate_section, all SEC_MERGE symbols *except* for
6968 section symbols have been adjusted.)
6969
6970 gas may reduce relocations against symbols in SEC_MERGE
6971 sections to a relocation against the section symbol when
6972 the original addend was zero. When the reloc is against
6973 a section symbol we should include the addend in the
6974 offset passed to _bfd_merged_section_offset, since the
6975 location of interest is the original symbol. On the
6976 other hand, an access to "sym+addend" where "sym" is not
6977 a section symbol should not include the addend; Such an
6978 access is presumed to be an offset from "sym"; The
6979 location of interest is just "sym". */
6980 if (sym_type == STT_SECTION)
6981 toff += irel->r_addend;
6982
6983 toff
6984 = _bfd_merged_section_offset (abfd, &tsec,
6985 elf_section_data (tsec)->sec_info,
6986 toff);
6987
6988 if (sym_type != STT_SECTION)
6989 toff += irel->r_addend;
6990 }
6991 /* PLTREL24 addends are special. */
6992 else if (r_type != R_PPC_PLTREL24)
6993 toff += irel->r_addend;
6994
6995 /* Attempted -shared link of non-pic code loses. */
6996 if ((!link_info->relocatable
6997 && tsec == bfd_und_section_ptr)
6998 || tsec->output_section == NULL
6999 || (tsec->owner != NULL
7000 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7001 continue;
7002
7003 roff = irel->r_offset;
7004
7005 /* If the branch is in range, no need to do anything. */
7006 if (tsec != bfd_und_section_ptr
7007 && (!link_info->relocatable
7008 /* A relocatable link may have sections moved during
7009 final link, so do not presume they remain in range. */
7010 || tsec->output_section == isec->output_section))
7011 {
7012 bfd_vma symaddr, reladdr;
7013
7014 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7015 reladdr = isec->output_section->vma + isec->output_offset + roff;
7016 if (symaddr - reladdr + max_branch_offset
7017 < 2 * max_branch_offset)
7018 continue;
7019 }
7020
7021 /* Look for an existing fixup to this address. */
7022 for (f = fixups; f ; f = f->next)
7023 if (f->tsec == tsec && f->toff == toff)
7024 break;
7025
7026 if (f == NULL)
7027 {
7028 size_t size;
7029 unsigned long stub_rtype;
7030
7031 val = trampoff - roff;
7032 if (val >= max_branch_offset)
7033 /* Oh dear, we can't reach a trampoline. Don't try to add
7034 one. We'll report an error later. */
7035 continue;
7036
7037 if (link_info->shared)
7038 {
7039 size = 4 * ARRAY_SIZE (shared_stub_entry);
7040 insn_offset = 12;
7041 }
7042 else
7043 {
7044 size = 4 * ARRAY_SIZE (stub_entry);
7045 insn_offset = 0;
7046 }
7047 stub_rtype = R_PPC_RELAX;
7048 if (tsec == htab->plt
7049 || tsec == htab->glink)
7050 {
7051 stub_rtype = R_PPC_RELAX_PLT;
7052 if (r_type == R_PPC_PLTREL24)
7053 stub_rtype = R_PPC_RELAX_PLTREL24;
7054 }
7055
7056 /* Hijack the old relocation. Since we need two
7057 relocations for this use a "composite" reloc. */
7058 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7059 stub_rtype);
7060 irel->r_offset = trampoff + insn_offset;
7061 if (r_type == R_PPC_PLTREL24
7062 && stub_rtype != R_PPC_RELAX_PLTREL24)
7063 irel->r_addend = 0;
7064
7065 /* Record the fixup so we don't do it again this section. */
7066 f = bfd_malloc (sizeof (*f));
7067 f->next = fixups;
7068 f->tsec = tsec;
7069 f->toff = toff;
7070 f->trampoff = trampoff;
7071 fixups = f;
7072
7073 trampoff += size;
7074 changes++;
7075 }
7076 else
7077 {
7078 val = f->trampoff - roff;
7079 if (val >= max_branch_offset)
7080 continue;
7081
7082 /* Nop out the reloc, since we're finalizing things here. */
7083 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7084 }
7085
7086 /* Get the section contents. */
7087 if (contents == NULL)
7088 {
7089 /* Get cached copy if it exists. */
7090 if (elf_section_data (isec)->this_hdr.contents != NULL)
7091 contents = elf_section_data (isec)->this_hdr.contents;
7092 /* Go get them off disk. */
7093 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7094 goto error_return;
7095 }
7096
7097 /* Fix up the existing branch to hit the trampoline. */
7098 hit_addr = contents + roff;
7099 switch (r_type)
7100 {
7101 case R_PPC_REL24:
7102 case R_PPC_LOCAL24PC:
7103 case R_PPC_PLTREL24:
7104 t0 = bfd_get_32 (abfd, hit_addr);
7105 t0 &= ~0x3fffffc;
7106 t0 |= val & 0x3fffffc;
7107 bfd_put_32 (abfd, t0, hit_addr);
7108 break;
7109
7110 case R_PPC_REL14:
7111 case R_PPC_REL14_BRTAKEN:
7112 case R_PPC_REL14_BRNTAKEN:
7113 t0 = bfd_get_32 (abfd, hit_addr);
7114 t0 &= ~0xfffc;
7115 t0 |= val & 0xfffc;
7116 bfd_put_32 (abfd, t0, hit_addr);
7117 break;
7118 }
7119 }
7120
7121 while (fixups != NULL)
7122 {
7123 struct one_fixup *f = fixups;
7124 fixups = fixups->next;
7125 free (f);
7126 }
7127 }
7128
7129 workaround_change = FALSE;
7130 newsize = trampoff;
7131 if (htab->params->ppc476_workaround
7132 && (!link_info->relocatable
7133 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7134 {
7135 bfd_vma addr, end_addr;
7136 unsigned int crossings;
7137 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7138
7139 addr = isec->output_section->vma + isec->output_offset;
7140 end_addr = addr + trampoff - 1;
7141 addr &= -pagesize;
7142 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7143 if (crossings != 0)
7144 {
7145 /* Keep space aligned, to ensure the patch code itself does
7146 not cross a page. Don't decrease size calculated on a
7147 previous pass as otherwise we might never settle on a layout. */
7148 newsize = 15 - (end_addr & 15);
7149 newsize += crossings * 16;
7150 if (relax_info->workaround_size < newsize)
7151 {
7152 relax_info->workaround_size = newsize;
7153 workaround_change = TRUE;
7154 }
7155 /* Ensure relocate_section is called. */
7156 isec->flags |= SEC_RELOC;
7157 }
7158 newsize = trampoff + relax_info->workaround_size;
7159 }
7160
7161 if (changes || workaround_change)
7162 isec->size = newsize;
7163
7164 if (isymbuf != NULL
7165 && symtab_hdr->contents != (unsigned char *) isymbuf)
7166 {
7167 if (! link_info->keep_memory)
7168 free (isymbuf);
7169 else
7170 {
7171 /* Cache the symbols for elf_link_input_bfd. */
7172 symtab_hdr->contents = (unsigned char *) isymbuf;
7173 }
7174 }
7175
7176 if (contents != NULL
7177 && elf_section_data (isec)->this_hdr.contents != contents)
7178 {
7179 if (!changes && !link_info->keep_memory)
7180 free (contents);
7181 else
7182 {
7183 /* Cache the section contents for elf_link_input_bfd. */
7184 elf_section_data (isec)->this_hdr.contents = contents;
7185 }
7186 }
7187
7188 if (changes != 0)
7189 {
7190 /* Append sufficient NOP relocs so we can write out relocation
7191 information for the trampolines. */
7192 Elf_Internal_Shdr *rel_hdr;
7193 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7194 * sizeof (*new_relocs));
7195 unsigned ix;
7196
7197 if (!new_relocs)
7198 goto error_return;
7199 memcpy (new_relocs, internal_relocs,
7200 isec->reloc_count * sizeof (*new_relocs));
7201 for (ix = changes; ix--;)
7202 {
7203 irel = new_relocs + ix + isec->reloc_count;
7204
7205 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7206 }
7207 if (internal_relocs != elf_section_data (isec)->relocs)
7208 free (internal_relocs);
7209 elf_section_data (isec)->relocs = new_relocs;
7210 isec->reloc_count += changes;
7211 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7212 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7213 }
7214 else if (internal_relocs != NULL
7215 && elf_section_data (isec)->relocs != internal_relocs)
7216 free (internal_relocs);
7217
7218 *again = changes != 0 || workaround_change;
7219 return TRUE;
7220
7221 error_return:
7222 while (fixups != NULL)
7223 {
7224 struct one_fixup *f = fixups;
7225 fixups = fixups->next;
7226 free (f);
7227 }
7228 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7229 free (isymbuf);
7230 if (contents != NULL
7231 && elf_section_data (isec)->this_hdr.contents != contents)
7232 free (contents);
7233 if (internal_relocs != NULL
7234 && elf_section_data (isec)->relocs != internal_relocs)
7235 free (internal_relocs);
7236 return FALSE;
7237 }
7238 \f
7239 /* What to do when ld finds relocations against symbols defined in
7240 discarded sections. */
7241
7242 static unsigned int
7243 ppc_elf_action_discarded (asection *sec)
7244 {
7245 if (strcmp (".fixup", sec->name) == 0)
7246 return 0;
7247
7248 if (strcmp (".got2", sec->name) == 0)
7249 return 0;
7250
7251 return _bfd_elf_default_action_discarded (sec);
7252 }
7253 \f
7254 /* Fill in the address for a pointer generated in a linker section. */
7255
7256 static bfd_vma
7257 elf_finish_pointer_linker_section (bfd *input_bfd,
7258 elf_linker_section_t *lsect,
7259 struct elf_link_hash_entry *h,
7260 bfd_vma relocation,
7261 const Elf_Internal_Rela *rel)
7262 {
7263 elf_linker_section_pointers_t *linker_section_ptr;
7264
7265 BFD_ASSERT (lsect != NULL);
7266
7267 if (h != NULL)
7268 {
7269 /* Handle global symbol. */
7270 struct ppc_elf_link_hash_entry *eh;
7271
7272 eh = (struct ppc_elf_link_hash_entry *) h;
7273 BFD_ASSERT (eh->elf.def_regular);
7274 linker_section_ptr = eh->linker_section_pointer;
7275 }
7276 else
7277 {
7278 /* Handle local symbol. */
7279 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7280
7281 BFD_ASSERT (is_ppc_elf (input_bfd));
7282 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7283 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7284 }
7285
7286 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7287 rel->r_addend,
7288 lsect);
7289 BFD_ASSERT (linker_section_ptr != NULL);
7290
7291 /* Offset will always be a multiple of four, so use the bottom bit
7292 as a "written" flag. */
7293 if ((linker_section_ptr->offset & 1) == 0)
7294 {
7295 bfd_put_32 (lsect->section->owner,
7296 relocation + linker_section_ptr->addend,
7297 lsect->section->contents + linker_section_ptr->offset);
7298 linker_section_ptr->offset += 1;
7299 }
7300
7301 relocation = (lsect->section->output_section->vma
7302 + lsect->section->output_offset
7303 + linker_section_ptr->offset - 1
7304 - SYM_VAL (lsect->sym));
7305
7306 #ifdef DEBUG
7307 fprintf (stderr,
7308 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7309 lsect->name, (long) relocation, (long) relocation);
7310 #endif
7311
7312 return relocation;
7313 }
7314
7315 #define PPC_LO(v) ((v) & 0xffff)
7316 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7317 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7318
7319 static void
7320 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7321 struct bfd_link_info *info)
7322 {
7323 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7324 bfd *output_bfd = info->output_bfd;
7325 bfd_vma plt;
7326
7327 plt = ((ent->plt.offset & ~1)
7328 + plt_sec->output_section->vma
7329 + plt_sec->output_offset);
7330
7331 if (info->shared)
7332 {
7333 bfd_vma got = 0;
7334
7335 if (ent->addend >= 32768)
7336 got = (ent->addend
7337 + ent->sec->output_section->vma
7338 + ent->sec->output_offset);
7339 else if (htab->elf.hgot != NULL)
7340 got = SYM_VAL (htab->elf.hgot);
7341
7342 plt -= got;
7343
7344 if (plt + 0x8000 < 0x10000)
7345 {
7346 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7347 p += 4;
7348 bfd_put_32 (output_bfd, MTCTR_11, p);
7349 p += 4;
7350 bfd_put_32 (output_bfd, BCTR, p);
7351 p += 4;
7352 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7353 p += 4;
7354 }
7355 else
7356 {
7357 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7358 p += 4;
7359 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7360 p += 4;
7361 bfd_put_32 (output_bfd, MTCTR_11, p);
7362 p += 4;
7363 bfd_put_32 (output_bfd, BCTR, p);
7364 p += 4;
7365 }
7366 }
7367 else
7368 {
7369 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7370 p += 4;
7371 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7372 p += 4;
7373 bfd_put_32 (output_bfd, MTCTR_11, p);
7374 p += 4;
7375 bfd_put_32 (output_bfd, BCTR, p);
7376 p += 4;
7377 }
7378 }
7379
7380 /* Return true if symbol is defined statically. */
7381
7382 static bfd_boolean
7383 is_static_defined (struct elf_link_hash_entry *h)
7384 {
7385 return ((h->root.type == bfd_link_hash_defined
7386 || h->root.type == bfd_link_hash_defweak)
7387 && h->root.u.def.section != NULL
7388 && h->root.u.def.section->output_section != NULL);
7389 }
7390
7391 /* If INSN is an opcode that may be used with an @tls operand, return
7392 the transformed insn for TLS optimisation, otherwise return 0. If
7393 REG is non-zero only match an insn with RB or RA equal to REG. */
7394
7395 unsigned int
7396 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7397 {
7398 unsigned int rtra;
7399
7400 if ((insn & (0x3f << 26)) != 31 << 26)
7401 return 0;
7402
7403 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7404 rtra = insn & ((1 << 26) - (1 << 16));
7405 else if (((insn >> 16) & 0x1f) == reg)
7406 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7407 else
7408 return 0;
7409
7410 if ((insn & (0x3ff << 1)) == 266 << 1)
7411 /* add -> addi. */
7412 insn = 14 << 26;
7413 else if ((insn & (0x1f << 1)) == 23 << 1
7414 && ((insn & (0x1f << 6)) < 14 << 6
7415 || ((insn & (0x1f << 6)) >= 16 << 6
7416 && (insn & (0x1f << 6)) < 24 << 6)))
7417 /* load and store indexed -> dform. */
7418 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7419 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7420 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7421 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7422 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7423 /* lwax -> lwa. */
7424 insn = (58 << 26) | 2;
7425 else
7426 return 0;
7427 insn |= rtra;
7428 return insn;
7429 }
7430
7431 /* If INSN is an opcode that may be used with an @tprel operand, return
7432 the transformed insn for an undefined weak symbol, ie. with the
7433 thread pointer REG operand removed. Otherwise return 0. */
7434
7435 unsigned int
7436 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7437 {
7438 if ((insn & (0x1f << 16)) == reg << 16
7439 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7440 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7441 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7442 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7443 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7444 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7445 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7446 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7447 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7448 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7449 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7450 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7451 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7452 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7453 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7454 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7455 && (insn & 3) != 1)
7456 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7457 && ((insn & 3) == 0 || (insn & 3) == 3))))
7458 {
7459 insn &= ~(0x1f << 16);
7460 }
7461 else if ((insn & (0x1f << 21)) == reg << 21
7462 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7463 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7464 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7465 {
7466 insn &= ~(0x1f << 21);
7467 insn |= (insn & (0x1f << 16)) << 5;
7468 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7469 insn -= 2 >> 26; /* convert to ori,oris */
7470 }
7471 else
7472 insn = 0;
7473 return insn;
7474 }
7475
7476 static bfd_boolean
7477 is_insn_ds_form (unsigned int insn)
7478 {
7479 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7480 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7481 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7482 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7483 }
7484
7485 static bfd_boolean
7486 is_insn_dq_form (unsigned int insn)
7487 {
7488 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7489 }
7490
7491 /* The RELOCATE_SECTION function is called by the ELF backend linker
7492 to handle the relocations for a section.
7493
7494 The relocs are always passed as Rela structures; if the section
7495 actually uses Rel structures, the r_addend field will always be
7496 zero.
7497
7498 This function is responsible for adjust the section contents as
7499 necessary, and (if using Rela relocs and generating a
7500 relocatable output file) adjusting the reloc addend as
7501 necessary.
7502
7503 This function does not have to worry about setting the reloc
7504 address or the reloc symbol index.
7505
7506 LOCAL_SYMS is a pointer to the swapped in local symbols.
7507
7508 LOCAL_SECTIONS is an array giving the section in the input file
7509 corresponding to the st_shndx field of each local symbol.
7510
7511 The global hash table entry for the global symbols can be found
7512 via elf_sym_hashes (input_bfd).
7513
7514 When generating relocatable output, this function must handle
7515 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7516 going to be the section symbol corresponding to the output
7517 section, which means that the addend must be adjusted
7518 accordingly. */
7519
7520 static bfd_boolean
7521 ppc_elf_relocate_section (bfd *output_bfd,
7522 struct bfd_link_info *info,
7523 bfd *input_bfd,
7524 asection *input_section,
7525 bfd_byte *contents,
7526 Elf_Internal_Rela *relocs,
7527 Elf_Internal_Sym *local_syms,
7528 asection **local_sections)
7529 {
7530 Elf_Internal_Shdr *symtab_hdr;
7531 struct elf_link_hash_entry **sym_hashes;
7532 struct ppc_elf_link_hash_table *htab;
7533 Elf_Internal_Rela *rel;
7534 Elf_Internal_Rela *relend;
7535 Elf_Internal_Rela outrel;
7536 asection *got2;
7537 bfd_vma *local_got_offsets;
7538 bfd_boolean ret = TRUE;
7539 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7540 bfd_boolean is_vxworks_tls;
7541
7542 #ifdef DEBUG
7543 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7544 "%ld relocations%s",
7545 input_bfd, input_section,
7546 (long) input_section->reloc_count,
7547 (info->relocatable) ? " (relocatable)" : "");
7548 #endif
7549
7550 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7551
7552 /* Initialize howto table if not already done. */
7553 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7554 ppc_elf_howto_init ();
7555
7556 htab = ppc_elf_hash_table (info);
7557 local_got_offsets = elf_local_got_offsets (input_bfd);
7558 symtab_hdr = &elf_symtab_hdr (input_bfd);
7559 sym_hashes = elf_sym_hashes (input_bfd);
7560 /* We have to handle relocations in vxworks .tls_vars sections
7561 specially, because the dynamic loader is 'weird'. */
7562 is_vxworks_tls = (htab->is_vxworks && info->shared
7563 && !strcmp (input_section->output_section->name,
7564 ".tls_vars"));
7565 rel = relocs;
7566 relend = relocs + input_section->reloc_count;
7567 for (; rel < relend; rel++)
7568 {
7569 enum elf_ppc_reloc_type r_type;
7570 bfd_vma addend;
7571 bfd_reloc_status_type r;
7572 Elf_Internal_Sym *sym;
7573 asection *sec;
7574 struct elf_link_hash_entry *h;
7575 const char *sym_name;
7576 reloc_howto_type *howto;
7577 unsigned long r_symndx;
7578 bfd_vma relocation;
7579 bfd_vma branch_bit, from;
7580 bfd_boolean unresolved_reloc;
7581 bfd_boolean warned;
7582 unsigned int tls_type, tls_mask, tls_gd;
7583 struct plt_entry **ifunc;
7584 struct reloc_howto_struct alt_howto;
7585
7586 r_type = ELF32_R_TYPE (rel->r_info);
7587 sym = NULL;
7588 sec = NULL;
7589 h = NULL;
7590 unresolved_reloc = FALSE;
7591 warned = FALSE;
7592 r_symndx = ELF32_R_SYM (rel->r_info);
7593
7594 if (r_symndx < symtab_hdr->sh_info)
7595 {
7596 sym = local_syms + r_symndx;
7597 sec = local_sections[r_symndx];
7598 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7599
7600 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7601 }
7602 else
7603 {
7604 bfd_boolean ignored;
7605
7606 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7607 r_symndx, symtab_hdr, sym_hashes,
7608 h, sec, relocation,
7609 unresolved_reloc, warned, ignored);
7610
7611 sym_name = h->root.root.string;
7612 }
7613
7614 if (sec != NULL && discarded_section (sec))
7615 {
7616 /* For relocs against symbols from removed linkonce sections,
7617 or sections discarded by a linker script, we just want the
7618 section contents zeroed. Avoid any special processing. */
7619 howto = NULL;
7620 if (r_type < R_PPC_max)
7621 howto = ppc_elf_howto_table[r_type];
7622 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7623 rel, 1, relend, howto, 0, contents);
7624 }
7625
7626 if (info->relocatable)
7627 {
7628 if (got2 != NULL
7629 && r_type == R_PPC_PLTREL24
7630 && rel->r_addend != 0)
7631 {
7632 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7633 addend specifies the GOT pointer offset within .got2. */
7634 rel->r_addend += got2->output_offset;
7635 }
7636 if (r_type != R_PPC_RELAX_PLT
7637 && r_type != R_PPC_RELAX_PLTREL24
7638 && r_type != R_PPC_RELAX)
7639 continue;
7640 }
7641
7642 /* TLS optimizations. Replace instruction sequences and relocs
7643 based on information we collected in tls_optimize. We edit
7644 RELOCS so that --emit-relocs will output something sensible
7645 for the final instruction stream. */
7646 tls_mask = 0;
7647 tls_gd = 0;
7648 if (h != NULL)
7649 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7650 else if (local_got_offsets != NULL)
7651 {
7652 struct plt_entry **local_plt;
7653 char *lgot_masks;
7654 local_plt
7655 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7656 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7657 tls_mask = lgot_masks[r_symndx];
7658 }
7659
7660 /* Ensure reloc mapping code below stays sane. */
7661 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7662 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7663 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7664 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7665 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7666 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7667 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7668 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7669 abort ();
7670 switch (r_type)
7671 {
7672 default:
7673 break;
7674
7675 case R_PPC_GOT_TPREL16:
7676 case R_PPC_GOT_TPREL16_LO:
7677 if ((tls_mask & TLS_TLS) != 0
7678 && (tls_mask & TLS_TPREL) == 0)
7679 {
7680 bfd_vma insn;
7681
7682 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7683 insn &= 31 << 21;
7684 insn |= 0x3c020000; /* addis 0,2,0 */
7685 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7686 r_type = R_PPC_TPREL16_HA;
7687 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7688 }
7689 break;
7690
7691 case R_PPC_TLS:
7692 if ((tls_mask & TLS_TLS) != 0
7693 && (tls_mask & TLS_TPREL) == 0)
7694 {
7695 bfd_vma insn;
7696
7697 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7698 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7699 if (insn == 0)
7700 abort ();
7701 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7702 r_type = R_PPC_TPREL16_LO;
7703 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7704
7705 /* Was PPC_TLS which sits on insn boundary, now
7706 PPC_TPREL16_LO which is at low-order half-word. */
7707 rel->r_offset += d_offset;
7708 }
7709 break;
7710
7711 case R_PPC_GOT_TLSGD16_HI:
7712 case R_PPC_GOT_TLSGD16_HA:
7713 tls_gd = TLS_TPRELGD;
7714 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7715 goto tls_gdld_hi;
7716 break;
7717
7718 case R_PPC_GOT_TLSLD16_HI:
7719 case R_PPC_GOT_TLSLD16_HA:
7720 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7721 {
7722 tls_gdld_hi:
7723 if ((tls_mask & tls_gd) != 0)
7724 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7725 + R_PPC_GOT_TPREL16);
7726 else
7727 {
7728 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7729 rel->r_offset -= d_offset;
7730 r_type = R_PPC_NONE;
7731 }
7732 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7733 }
7734 break;
7735
7736 case R_PPC_GOT_TLSGD16:
7737 case R_PPC_GOT_TLSGD16_LO:
7738 tls_gd = TLS_TPRELGD;
7739 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7740 goto tls_ldgd_opt;
7741 break;
7742
7743 case R_PPC_GOT_TLSLD16:
7744 case R_PPC_GOT_TLSLD16_LO:
7745 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7746 {
7747 unsigned int insn1, insn2;
7748 bfd_vma offset;
7749
7750 tls_ldgd_opt:
7751 offset = (bfd_vma) -1;
7752 /* If not using the newer R_PPC_TLSGD/LD to mark
7753 __tls_get_addr calls, we must trust that the call
7754 stays with its arg setup insns, ie. that the next
7755 reloc is the __tls_get_addr call associated with
7756 the current reloc. Edit both insns. */
7757 if (input_section->has_tls_get_addr_call
7758 && rel + 1 < relend
7759 && branch_reloc_hash_match (input_bfd, rel + 1,
7760 htab->tls_get_addr))
7761 offset = rel[1].r_offset;
7762 if ((tls_mask & tls_gd) != 0)
7763 {
7764 /* IE */
7765 insn1 = bfd_get_32 (output_bfd,
7766 contents + rel->r_offset - d_offset);
7767 insn1 &= (1 << 26) - 1;
7768 insn1 |= 32 << 26; /* lwz */
7769 if (offset != (bfd_vma) -1)
7770 {
7771 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7772 insn2 = 0x7c631214; /* add 3,3,2 */
7773 bfd_put_32 (output_bfd, insn2, contents + offset);
7774 }
7775 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7776 + R_PPC_GOT_TPREL16);
7777 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7778 }
7779 else
7780 {
7781 /* LE */
7782 insn1 = 0x3c620000; /* addis 3,2,0 */
7783 if (tls_gd == 0)
7784 {
7785 /* Was an LD reloc. */
7786 for (r_symndx = 0;
7787 r_symndx < symtab_hdr->sh_info;
7788 r_symndx++)
7789 if (local_sections[r_symndx] == sec)
7790 break;
7791 if (r_symndx >= symtab_hdr->sh_info)
7792 r_symndx = STN_UNDEF;
7793 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7794 if (r_symndx != STN_UNDEF)
7795 rel->r_addend -= (local_syms[r_symndx].st_value
7796 + sec->output_offset
7797 + sec->output_section->vma);
7798 }
7799 r_type = R_PPC_TPREL16_HA;
7800 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7801 if (offset != (bfd_vma) -1)
7802 {
7803 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7804 rel[1].r_offset = offset + d_offset;
7805 rel[1].r_addend = rel->r_addend;
7806 insn2 = 0x38630000; /* addi 3,3,0 */
7807 bfd_put_32 (output_bfd, insn2, contents + offset);
7808 }
7809 }
7810 bfd_put_32 (output_bfd, insn1,
7811 contents + rel->r_offset - d_offset);
7812 if (tls_gd == 0)
7813 {
7814 /* We changed the symbol on an LD reloc. Start over
7815 in order to get h, sym, sec etc. right. */
7816 rel--;
7817 continue;
7818 }
7819 }
7820 break;
7821
7822 case R_PPC_TLSGD:
7823 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7824 {
7825 unsigned int insn2;
7826 bfd_vma offset = rel->r_offset;
7827
7828 if ((tls_mask & TLS_TPRELGD) != 0)
7829 {
7830 /* IE */
7831 r_type = R_PPC_NONE;
7832 insn2 = 0x7c631214; /* add 3,3,2 */
7833 }
7834 else
7835 {
7836 /* LE */
7837 r_type = R_PPC_TPREL16_LO;
7838 rel->r_offset += d_offset;
7839 insn2 = 0x38630000; /* addi 3,3,0 */
7840 }
7841 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7842 bfd_put_32 (output_bfd, insn2, contents + offset);
7843 /* Zap the reloc on the _tls_get_addr call too. */
7844 BFD_ASSERT (offset == rel[1].r_offset);
7845 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7846 }
7847 break;
7848
7849 case R_PPC_TLSLD:
7850 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7851 {
7852 unsigned int insn2;
7853
7854 for (r_symndx = 0;
7855 r_symndx < symtab_hdr->sh_info;
7856 r_symndx++)
7857 if (local_sections[r_symndx] == sec)
7858 break;
7859 if (r_symndx >= symtab_hdr->sh_info)
7860 r_symndx = STN_UNDEF;
7861 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7862 if (r_symndx != STN_UNDEF)
7863 rel->r_addend -= (local_syms[r_symndx].st_value
7864 + sec->output_offset
7865 + sec->output_section->vma);
7866
7867 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7868 rel->r_offset += d_offset;
7869 insn2 = 0x38630000; /* addi 3,3,0 */
7870 bfd_put_32 (output_bfd, insn2,
7871 contents + rel->r_offset - d_offset);
7872 /* Zap the reloc on the _tls_get_addr call too. */
7873 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7874 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7875 rel--;
7876 continue;
7877 }
7878 break;
7879 }
7880
7881 /* Handle other relocations that tweak non-addend part of insn. */
7882 branch_bit = 0;
7883 switch (r_type)
7884 {
7885 default:
7886 break;
7887
7888 /* Branch taken prediction relocations. */
7889 case R_PPC_ADDR14_BRTAKEN:
7890 case R_PPC_REL14_BRTAKEN:
7891 branch_bit = BRANCH_PREDICT_BIT;
7892 /* Fall thru */
7893
7894 /* Branch not taken prediction relocations. */
7895 case R_PPC_ADDR14_BRNTAKEN:
7896 case R_PPC_REL14_BRNTAKEN:
7897 {
7898 bfd_vma insn;
7899
7900 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7901 insn &= ~BRANCH_PREDICT_BIT;
7902 insn |= branch_bit;
7903
7904 from = (rel->r_offset
7905 + input_section->output_offset
7906 + input_section->output_section->vma);
7907
7908 /* Invert 'y' bit if not the default. */
7909 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7910 insn ^= BRANCH_PREDICT_BIT;
7911
7912 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7913 break;
7914 }
7915 }
7916
7917 ifunc = NULL;
7918 if (!htab->is_vxworks)
7919 {
7920 struct plt_entry *ent;
7921
7922 if (h != NULL)
7923 {
7924 if (h->type == STT_GNU_IFUNC)
7925 ifunc = &h->plt.plist;
7926 }
7927 else if (local_got_offsets != NULL
7928 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7929 {
7930 struct plt_entry **local_plt;
7931
7932 local_plt = (struct plt_entry **) (local_got_offsets
7933 + symtab_hdr->sh_info);
7934 ifunc = local_plt + r_symndx;
7935 }
7936
7937 ent = NULL;
7938 if (ifunc != NULL
7939 && (!info->shared
7940 || is_branch_reloc (r_type)))
7941 {
7942 addend = 0;
7943 if (r_type == R_PPC_PLTREL24 && info->shared)
7944 addend = rel->r_addend;
7945 ent = find_plt_ent (ifunc, got2, addend);
7946 }
7947 if (ent != NULL)
7948 {
7949 if (h == NULL && (ent->plt.offset & 1) == 0)
7950 {
7951 Elf_Internal_Rela rela;
7952 bfd_byte *loc;
7953
7954 rela.r_offset = (htab->iplt->output_section->vma
7955 + htab->iplt->output_offset
7956 + ent->plt.offset);
7957 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7958 rela.r_addend = relocation;
7959 loc = htab->reliplt->contents;
7960 loc += (htab->reliplt->reloc_count++
7961 * sizeof (Elf32_External_Rela));
7962 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7963
7964 ent->plt.offset |= 1;
7965 }
7966 if (h == NULL && (ent->glink_offset & 1) == 0)
7967 {
7968 unsigned char *p = ((unsigned char *) htab->glink->contents
7969 + ent->glink_offset);
7970 write_glink_stub (ent, htab->iplt, p, info);
7971 ent->glink_offset |= 1;
7972 }
7973
7974 unresolved_reloc = FALSE;
7975 if (htab->plt_type == PLT_NEW
7976 || !htab->elf.dynamic_sections_created
7977 || h == NULL
7978 || h->dynindx == -1)
7979 relocation = (htab->glink->output_section->vma
7980 + htab->glink->output_offset
7981 + (ent->glink_offset & ~1));
7982 else
7983 relocation = (htab->plt->output_section->vma
7984 + htab->plt->output_offset
7985 + ent->plt.offset);
7986 }
7987 }
7988
7989 addend = rel->r_addend;
7990 tls_type = 0;
7991 howto = NULL;
7992 if (r_type < R_PPC_max)
7993 howto = ppc_elf_howto_table[r_type];
7994 switch (r_type)
7995 {
7996 default:
7997 info->callbacks->einfo
7998 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7999 input_bfd, (int) r_type, sym_name);
8000
8001 bfd_set_error (bfd_error_bad_value);
8002 ret = FALSE;
8003 continue;
8004
8005 case R_PPC_NONE:
8006 case R_PPC_TLS:
8007 case R_PPC_TLSGD:
8008 case R_PPC_TLSLD:
8009 case R_PPC_EMB_MRKREF:
8010 case R_PPC_GNU_VTINHERIT:
8011 case R_PPC_GNU_VTENTRY:
8012 continue;
8013
8014 /* GOT16 relocations. Like an ADDR16 using the symbol's
8015 address in the GOT as relocation value instead of the
8016 symbol's value itself. Also, create a GOT entry for the
8017 symbol and put the symbol value there. */
8018 case R_PPC_GOT_TLSGD16:
8019 case R_PPC_GOT_TLSGD16_LO:
8020 case R_PPC_GOT_TLSGD16_HI:
8021 case R_PPC_GOT_TLSGD16_HA:
8022 tls_type = TLS_TLS | TLS_GD;
8023 goto dogot;
8024
8025 case R_PPC_GOT_TLSLD16:
8026 case R_PPC_GOT_TLSLD16_LO:
8027 case R_PPC_GOT_TLSLD16_HI:
8028 case R_PPC_GOT_TLSLD16_HA:
8029 tls_type = TLS_TLS | TLS_LD;
8030 goto dogot;
8031
8032 case R_PPC_GOT_TPREL16:
8033 case R_PPC_GOT_TPREL16_LO:
8034 case R_PPC_GOT_TPREL16_HI:
8035 case R_PPC_GOT_TPREL16_HA:
8036 tls_type = TLS_TLS | TLS_TPREL;
8037 goto dogot;
8038
8039 case R_PPC_GOT_DTPREL16:
8040 case R_PPC_GOT_DTPREL16_LO:
8041 case R_PPC_GOT_DTPREL16_HI:
8042 case R_PPC_GOT_DTPREL16_HA:
8043 tls_type = TLS_TLS | TLS_DTPREL;
8044 goto dogot;
8045
8046 case R_PPC_GOT16:
8047 case R_PPC_GOT16_LO:
8048 case R_PPC_GOT16_HI:
8049 case R_PPC_GOT16_HA:
8050 tls_mask = 0;
8051 dogot:
8052 {
8053 /* Relocation is to the entry for this symbol in the global
8054 offset table. */
8055 bfd_vma off;
8056 bfd_vma *offp;
8057 unsigned long indx;
8058
8059 if (htab->got == NULL)
8060 abort ();
8061
8062 indx = 0;
8063 if (tls_type == (TLS_TLS | TLS_LD)
8064 && (h == NULL
8065 || !h->def_dynamic))
8066 offp = &htab->tlsld_got.offset;
8067 else if (h != NULL)
8068 {
8069 bfd_boolean dyn;
8070 dyn = htab->elf.dynamic_sections_created;
8071 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8072 || (info->shared
8073 && SYMBOL_REFERENCES_LOCAL (info, h)))
8074 /* This is actually a static link, or it is a
8075 -Bsymbolic link and the symbol is defined
8076 locally, or the symbol was forced to be local
8077 because of a version file. */
8078 ;
8079 else
8080 {
8081 BFD_ASSERT (h->dynindx != -1);
8082 indx = h->dynindx;
8083 unresolved_reloc = FALSE;
8084 }
8085 offp = &h->got.offset;
8086 }
8087 else
8088 {
8089 if (local_got_offsets == NULL)
8090 abort ();
8091 offp = &local_got_offsets[r_symndx];
8092 }
8093
8094 /* The offset must always be a multiple of 4. We use the
8095 least significant bit to record whether we have already
8096 processed this entry. */
8097 off = *offp;
8098 if ((off & 1) != 0)
8099 off &= ~1;
8100 else
8101 {
8102 unsigned int tls_m = (tls_mask
8103 & (TLS_LD | TLS_GD | TLS_DTPREL
8104 | TLS_TPREL | TLS_TPRELGD));
8105
8106 if (offp == &htab->tlsld_got.offset)
8107 tls_m = TLS_LD;
8108 else if (h == NULL
8109 || !h->def_dynamic)
8110 tls_m &= ~TLS_LD;
8111
8112 /* We might have multiple got entries for this sym.
8113 Initialize them all. */
8114 do
8115 {
8116 int tls_ty = 0;
8117
8118 if ((tls_m & TLS_LD) != 0)
8119 {
8120 tls_ty = TLS_TLS | TLS_LD;
8121 tls_m &= ~TLS_LD;
8122 }
8123 else if ((tls_m & TLS_GD) != 0)
8124 {
8125 tls_ty = TLS_TLS | TLS_GD;
8126 tls_m &= ~TLS_GD;
8127 }
8128 else if ((tls_m & TLS_DTPREL) != 0)
8129 {
8130 tls_ty = TLS_TLS | TLS_DTPREL;
8131 tls_m &= ~TLS_DTPREL;
8132 }
8133 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8134 {
8135 tls_ty = TLS_TLS | TLS_TPREL;
8136 tls_m = 0;
8137 }
8138
8139 /* Generate relocs for the dynamic linker. */
8140 if ((info->shared || indx != 0)
8141 && (offp == &htab->tlsld_got.offset
8142 || h == NULL
8143 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8144 || h->root.type != bfd_link_hash_undefweak))
8145 {
8146 asection *rsec = htab->relgot;
8147 bfd_byte * loc;
8148
8149 if (ifunc != NULL)
8150 rsec = htab->reliplt;
8151 outrel.r_offset = (htab->got->output_section->vma
8152 + htab->got->output_offset
8153 + off);
8154 outrel.r_addend = 0;
8155 if (tls_ty & (TLS_LD | TLS_GD))
8156 {
8157 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8158 if (tls_ty == (TLS_TLS | TLS_GD))
8159 {
8160 loc = rsec->contents;
8161 loc += (rsec->reloc_count++
8162 * sizeof (Elf32_External_Rela));
8163 bfd_elf32_swap_reloca_out (output_bfd,
8164 &outrel, loc);
8165 outrel.r_offset += 4;
8166 outrel.r_info
8167 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8168 }
8169 }
8170 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8171 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8172 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8173 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8174 else if (indx != 0)
8175 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8176 else if (ifunc != NULL)
8177 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8178 else
8179 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8180 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8181 {
8182 outrel.r_addend += relocation;
8183 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8184 outrel.r_addend -= htab->elf.tls_sec->vma;
8185 }
8186 loc = rsec->contents;
8187 loc += (rsec->reloc_count++
8188 * sizeof (Elf32_External_Rela));
8189 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8190 }
8191
8192 /* Init the .got section contents if we're not
8193 emitting a reloc. */
8194 else
8195 {
8196 bfd_vma value = relocation;
8197
8198 if (tls_ty == (TLS_TLS | TLS_LD))
8199 value = 1;
8200 else if (tls_ty != 0)
8201 {
8202 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8203 if (tls_ty == (TLS_TLS | TLS_TPREL))
8204 value += DTP_OFFSET - TP_OFFSET;
8205
8206 if (tls_ty == (TLS_TLS | TLS_GD))
8207 {
8208 bfd_put_32 (output_bfd, value,
8209 htab->got->contents + off + 4);
8210 value = 1;
8211 }
8212 }
8213 bfd_put_32 (output_bfd, value,
8214 htab->got->contents + off);
8215 }
8216
8217 off += 4;
8218 if (tls_ty & (TLS_LD | TLS_GD))
8219 off += 4;
8220 }
8221 while (tls_m != 0);
8222
8223 off = *offp;
8224 *offp = off | 1;
8225 }
8226
8227 if (off >= (bfd_vma) -2)
8228 abort ();
8229
8230 if ((tls_type & TLS_TLS) != 0)
8231 {
8232 if (tls_type != (TLS_TLS | TLS_LD))
8233 {
8234 if ((tls_mask & TLS_LD) != 0
8235 && !(h == NULL
8236 || !h->def_dynamic))
8237 off += 8;
8238 if (tls_type != (TLS_TLS | TLS_GD))
8239 {
8240 if ((tls_mask & TLS_GD) != 0)
8241 off += 8;
8242 if (tls_type != (TLS_TLS | TLS_DTPREL))
8243 {
8244 if ((tls_mask & TLS_DTPREL) != 0)
8245 off += 4;
8246 }
8247 }
8248 }
8249 }
8250
8251 relocation = (htab->got->output_section->vma
8252 + htab->got->output_offset
8253 + off
8254 - SYM_VAL (htab->elf.hgot));
8255
8256 /* Addends on got relocations don't make much sense.
8257 x+off@got is actually x@got+off, and since the got is
8258 generated by a hash table traversal, the value in the
8259 got at entry m+n bears little relation to the entry m. */
8260 if (addend != 0)
8261 info->callbacks->einfo
8262 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8263 input_bfd, input_section, rel->r_offset,
8264 howto->name,
8265 sym_name);
8266 }
8267 break;
8268
8269 /* Relocations that need no special processing. */
8270 case R_PPC_LOCAL24PC:
8271 /* It makes no sense to point a local relocation
8272 at a symbol not in this object. */
8273 if (unresolved_reloc)
8274 {
8275 if (! (*info->callbacks->undefined_symbol) (info,
8276 h->root.root.string,
8277 input_bfd,
8278 input_section,
8279 rel->r_offset,
8280 TRUE))
8281 return FALSE;
8282 continue;
8283 }
8284 break;
8285
8286 case R_PPC_DTPREL16:
8287 case R_PPC_DTPREL16_LO:
8288 case R_PPC_DTPREL16_HI:
8289 case R_PPC_DTPREL16_HA:
8290 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8291 break;
8292
8293 /* Relocations that may need to be propagated if this is a shared
8294 object. */
8295 case R_PPC_TPREL16:
8296 case R_PPC_TPREL16_LO:
8297 case R_PPC_TPREL16_HI:
8298 case R_PPC_TPREL16_HA:
8299 if (h != NULL
8300 && h->root.type == bfd_link_hash_undefweak
8301 && h->dynindx == -1)
8302 {
8303 /* Make this relocation against an undefined weak symbol
8304 resolve to zero. This is really just a tweak, since
8305 code using weak externs ought to check that they are
8306 defined before using them. */
8307 bfd_byte *p = contents + rel->r_offset - d_offset;
8308 unsigned int insn = bfd_get_32 (output_bfd, p);
8309 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8310 if (insn != 0)
8311 bfd_put_32 (output_bfd, insn, p);
8312 break;
8313 }
8314 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8315 /* The TPREL16 relocs shouldn't really be used in shared
8316 libs as they will result in DT_TEXTREL being set, but
8317 support them anyway. */
8318 goto dodyn;
8319
8320 case R_PPC_TPREL32:
8321 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8322 goto dodyn;
8323
8324 case R_PPC_DTPREL32:
8325 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8326 goto dodyn;
8327
8328 case R_PPC_DTPMOD32:
8329 relocation = 1;
8330 addend = 0;
8331 goto dodyn;
8332
8333 case R_PPC_REL16:
8334 case R_PPC_REL16_LO:
8335 case R_PPC_REL16_HI:
8336 case R_PPC_REL16_HA:
8337 break;
8338
8339 case R_PPC_REL32:
8340 if (h == NULL || h == htab->elf.hgot)
8341 break;
8342 /* fall through */
8343
8344 case R_PPC_ADDR32:
8345 case R_PPC_ADDR16:
8346 case R_PPC_ADDR16_LO:
8347 case R_PPC_ADDR16_HI:
8348 case R_PPC_ADDR16_HA:
8349 case R_PPC_UADDR32:
8350 case R_PPC_UADDR16:
8351 goto dodyn;
8352
8353 case R_PPC_VLE_REL8:
8354 case R_PPC_VLE_REL15:
8355 case R_PPC_VLE_REL24:
8356 case R_PPC_REL24:
8357 case R_PPC_REL14:
8358 case R_PPC_REL14_BRTAKEN:
8359 case R_PPC_REL14_BRNTAKEN:
8360 /* If these relocations are not to a named symbol, they can be
8361 handled right here, no need to bother the dynamic linker. */
8362 if (SYMBOL_CALLS_LOCAL (info, h)
8363 || h == htab->elf.hgot)
8364 break;
8365 /* fall through */
8366
8367 case R_PPC_ADDR24:
8368 case R_PPC_ADDR14:
8369 case R_PPC_ADDR14_BRTAKEN:
8370 case R_PPC_ADDR14_BRNTAKEN:
8371 if (h != NULL && !info->shared)
8372 break;
8373 /* fall through */
8374
8375 dodyn:
8376 if ((input_section->flags & SEC_ALLOC) == 0
8377 || is_vxworks_tls)
8378 break;
8379
8380 if ((info->shared
8381 && !(h != NULL
8382 && ((h->root.type == bfd_link_hash_undefined
8383 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8384 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8385 || (h->root.type == bfd_link_hash_undefweak
8386 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8387 && (must_be_dyn_reloc (info, r_type)
8388 || !SYMBOL_CALLS_LOCAL (info, h)))
8389 || (ELIMINATE_COPY_RELOCS
8390 && !info->shared
8391 && h != NULL
8392 && h->dynindx != -1
8393 && !h->non_got_ref
8394 && !h->def_regular))
8395 {
8396 int skip;
8397 bfd_byte *loc;
8398 asection *sreloc;
8399 #ifdef DEBUG
8400 fprintf (stderr, "ppc_elf_relocate_section needs to "
8401 "create relocation for %s\n",
8402 (h && h->root.root.string
8403 ? h->root.root.string : "<unknown>"));
8404 #endif
8405
8406 /* When generating a shared object, these relocations
8407 are copied into the output file to be resolved at run
8408 time. */
8409 sreloc = elf_section_data (input_section)->sreloc;
8410 if (ifunc)
8411 sreloc = htab->reliplt;
8412 if (sreloc == NULL)
8413 return FALSE;
8414
8415 skip = 0;
8416 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8417 input_section,
8418 rel->r_offset);
8419 if (outrel.r_offset == (bfd_vma) -1
8420 || outrel.r_offset == (bfd_vma) -2)
8421 skip = (int) outrel.r_offset;
8422 outrel.r_offset += (input_section->output_section->vma
8423 + input_section->output_offset);
8424
8425 if (skip)
8426 memset (&outrel, 0, sizeof outrel);
8427 else if ((h != NULL
8428 && (h->root.type == bfd_link_hash_undefined
8429 || h->root.type == bfd_link_hash_undefweak))
8430 || !SYMBOL_REFERENCES_LOCAL (info, h))
8431 {
8432 BFD_ASSERT (h->dynindx != -1);
8433 unresolved_reloc = FALSE;
8434 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8435 outrel.r_addend = rel->r_addend;
8436 }
8437 else
8438 {
8439 outrel.r_addend = relocation + rel->r_addend;
8440
8441 if (r_type != R_PPC_ADDR32)
8442 {
8443 long indx = 0;
8444
8445 if (ifunc != NULL)
8446 {
8447 /* If we get here when building a static
8448 executable, then the libc startup function
8449 responsible for applying indirect function
8450 relocations is going to complain about
8451 the reloc type.
8452 If we get here when building a dynamic
8453 executable, it will be because we have
8454 a text relocation. The dynamic loader
8455 will set the text segment writable and
8456 non-executable to apply text relocations.
8457 So we'll segfault when trying to run the
8458 indirection function to resolve the reloc. */
8459 info->callbacks->einfo
8460 (_("%P: %H: relocation %s for indirect "
8461 "function %s unsupported\n"),
8462 input_bfd, input_section, rel->r_offset,
8463 howto->name,
8464 sym_name);
8465 ret = FALSE;
8466 }
8467 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8468 ;
8469 else if (sec == NULL || sec->owner == NULL)
8470 {
8471 bfd_set_error (bfd_error_bad_value);
8472 ret = FALSE;
8473 }
8474 else
8475 {
8476 asection *osec;
8477
8478 /* We are turning this relocation into one
8479 against a section symbol. It would be
8480 proper to subtract the symbol's value,
8481 osec->vma, from the emitted reloc addend,
8482 but ld.so expects buggy relocs.
8483 FIXME: Why not always use a zero index? */
8484 osec = sec->output_section;
8485 indx = elf_section_data (osec)->dynindx;
8486 if (indx == 0)
8487 {
8488 osec = htab->elf.text_index_section;
8489 indx = elf_section_data (osec)->dynindx;
8490 }
8491 BFD_ASSERT (indx != 0);
8492 #ifdef DEBUG
8493 if (indx == 0)
8494 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8495 indx, osec->name, osec->flags,
8496 h->root.root.string);
8497 #endif
8498 }
8499
8500 outrel.r_info = ELF32_R_INFO (indx, r_type);
8501 }
8502 else if (ifunc != NULL)
8503 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8504 else
8505 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8506 }
8507
8508 loc = sreloc->contents;
8509 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8510 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8511
8512 if (skip == -1)
8513 continue;
8514
8515 /* This reloc will be computed at runtime. We clear the memory
8516 so that it contains predictable value. */
8517 if (! skip
8518 && ((input_section->flags & SEC_ALLOC) != 0
8519 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8520 {
8521 relocation = howto->pc_relative ? outrel.r_offset : 0;
8522 addend = 0;
8523 break;
8524 }
8525 }
8526 break;
8527
8528 case R_PPC_RELAX_PLT:
8529 case R_PPC_RELAX_PLTREL24:
8530 if (h != NULL)
8531 {
8532 struct plt_entry *ent;
8533 bfd_vma got2_addend = 0;
8534
8535 if (r_type == R_PPC_RELAX_PLTREL24)
8536 {
8537 if (info->shared)
8538 got2_addend = addend;
8539 addend = 0;
8540 }
8541 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8542 if (htab->plt_type == PLT_NEW)
8543 relocation = (htab->glink->output_section->vma
8544 + htab->glink->output_offset
8545 + ent->glink_offset);
8546 else
8547 relocation = (htab->plt->output_section->vma
8548 + htab->plt->output_offset
8549 + ent->plt.offset);
8550 }
8551 /* Fall thru */
8552
8553 case R_PPC_RELAX:
8554 {
8555 const int *stub;
8556 size_t size;
8557 size_t insn_offset = rel->r_offset;
8558 unsigned int insn;
8559
8560 if (info->shared)
8561 {
8562 relocation -= (input_section->output_section->vma
8563 + input_section->output_offset
8564 + rel->r_offset - 4);
8565 stub = shared_stub_entry;
8566 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8567 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8568 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8569 stub += 3;
8570 size = ARRAY_SIZE (shared_stub_entry) - 3;
8571 }
8572 else
8573 {
8574 stub = stub_entry;
8575 size = ARRAY_SIZE (stub_entry);
8576 }
8577
8578 relocation += addend;
8579 if (info->relocatable)
8580 relocation = 0;
8581
8582 /* First insn is HA, second is LO. */
8583 insn = *stub++;
8584 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8585 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8586 insn_offset += 4;
8587
8588 insn = *stub++;
8589 insn |= relocation & 0xffff;
8590 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8591 insn_offset += 4;
8592 size -= 2;
8593
8594 while (size != 0)
8595 {
8596 insn = *stub++;
8597 --size;
8598 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8599 insn_offset += 4;
8600 }
8601
8602 /* Rewrite the reloc and convert one of the trailing nop
8603 relocs to describe this relocation. */
8604 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8605 /* The relocs are at the bottom 2 bytes */
8606 rel[0].r_offset += d_offset;
8607 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8608 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8609 rel[1].r_offset += 4;
8610 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8611 rel++;
8612 }
8613 continue;
8614
8615 /* Indirect .sdata relocation. */
8616 case R_PPC_EMB_SDAI16:
8617 BFD_ASSERT (htab->sdata[0].section != NULL);
8618 if (!is_static_defined (htab->sdata[0].sym))
8619 {
8620 unresolved_reloc = TRUE;
8621 break;
8622 }
8623 relocation
8624 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8625 h, relocation, rel);
8626 addend = 0;
8627 break;
8628
8629 /* Indirect .sdata2 relocation. */
8630 case R_PPC_EMB_SDA2I16:
8631 BFD_ASSERT (htab->sdata[1].section != NULL);
8632 if (!is_static_defined (htab->sdata[1].sym))
8633 {
8634 unresolved_reloc = TRUE;
8635 break;
8636 }
8637 relocation
8638 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8639 h, relocation, rel);
8640 addend = 0;
8641 break;
8642
8643 /* Handle the TOC16 reloc. We want to use the offset within the .got
8644 section, not the actual VMA. This is appropriate when generating
8645 an embedded ELF object, for which the .got section acts like the
8646 AIX .toc section. */
8647 case R_PPC_TOC16: /* phony GOT16 relocations */
8648 if (sec == NULL || sec->output_section == NULL)
8649 {
8650 unresolved_reloc = TRUE;
8651 break;
8652 }
8653 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8654 ".got") == 0
8655 || strcmp (bfd_get_section_name (sec->owner, sec),
8656 ".cgot") == 0);
8657
8658 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8659 break;
8660
8661 case R_PPC_PLTREL24:
8662 if (h != NULL && ifunc == NULL)
8663 {
8664 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8665 info->shared ? addend : 0);
8666 if (ent == NULL
8667 || htab->plt == NULL)
8668 {
8669 /* We didn't make a PLT entry for this symbol. This
8670 happens when statically linking PIC code, or when
8671 using -Bsymbolic. */
8672 }
8673 else
8674 {
8675 /* Relocation is to the entry for this symbol in the
8676 procedure linkage table. */
8677 unresolved_reloc = FALSE;
8678 if (htab->plt_type == PLT_NEW)
8679 relocation = (htab->glink->output_section->vma
8680 + htab->glink->output_offset
8681 + ent->glink_offset);
8682 else
8683 relocation = (htab->plt->output_section->vma
8684 + htab->plt->output_offset
8685 + ent->plt.offset);
8686 }
8687 }
8688
8689 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8690 addend specifies the GOT pointer offset within .got2.
8691 Don't apply it to the relocation field. */
8692 addend = 0;
8693 break;
8694
8695 /* Relocate against _SDA_BASE_. */
8696 case R_PPC_SDAREL16:
8697 {
8698 const char *name;
8699 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8700
8701 if (sec == NULL
8702 || sec->output_section == NULL
8703 || !is_static_defined (sda))
8704 {
8705 unresolved_reloc = TRUE;
8706 break;
8707 }
8708 addend -= SYM_VAL (sda);
8709
8710 name = bfd_get_section_name (output_bfd, sec->output_section);
8711 if (!(strcmp (name, ".sdata") == 0
8712 || strcmp (name, ".sbss") == 0))
8713 {
8714 info->callbacks->einfo
8715 (_("%P: %B: the target (%s) of a %s relocation is "
8716 "in the wrong output section (%s)\n"),
8717 input_bfd,
8718 sym_name,
8719 howto->name,
8720 name);
8721 }
8722 }
8723 break;
8724
8725 /* Relocate against _SDA2_BASE_. */
8726 case R_PPC_EMB_SDA2REL:
8727 {
8728 const char *name;
8729 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8730
8731 if (sec == NULL
8732 || sec->output_section == NULL
8733 || !is_static_defined (sda))
8734 {
8735 unresolved_reloc = TRUE;
8736 break;
8737 }
8738 addend -= SYM_VAL (sda);
8739
8740 name = bfd_get_section_name (output_bfd, sec->output_section);
8741 if (!(strcmp (name, ".sdata2") == 0
8742 || strcmp (name, ".sbss2") == 0))
8743 {
8744 info->callbacks->einfo
8745 (_("%P: %B: the target (%s) of a %s relocation is "
8746 "in the wrong output section (%s)\n"),
8747 input_bfd,
8748 sym_name,
8749 howto->name,
8750 name);
8751 }
8752 }
8753 break;
8754
8755 case R_PPC_VLE_LO16A:
8756 relocation = relocation + addend;
8757 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8758 relocation, split16a_type);
8759 continue;
8760
8761 case R_PPC_VLE_LO16D:
8762 relocation = relocation + addend;
8763 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8764 relocation, split16d_type);
8765 continue;
8766
8767 case R_PPC_VLE_HI16A:
8768 relocation = (relocation + addend) >> 16;
8769 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8770 relocation, split16a_type);
8771 continue;
8772
8773 case R_PPC_VLE_HI16D:
8774 relocation = (relocation + addend) >> 16;
8775 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8776 relocation, split16d_type);
8777 continue;
8778
8779 case R_PPC_VLE_HA16A:
8780 relocation = (relocation + addend + 0x8000) >> 16;
8781 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8782 relocation, split16a_type);
8783 continue;
8784
8785 case R_PPC_VLE_HA16D:
8786 relocation = (relocation + addend + 0x8000) >> 16;
8787 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8788 relocation, split16d_type);
8789 continue;
8790
8791 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8792 case R_PPC_EMB_SDA21:
8793 case R_PPC_VLE_SDA21:
8794 case R_PPC_EMB_RELSDA:
8795 case R_PPC_VLE_SDA21_LO:
8796 {
8797 const char *name;
8798 int reg;
8799 unsigned int insn;
8800 struct elf_link_hash_entry *sda = NULL;
8801
8802 if (sec == NULL || sec->output_section == NULL)
8803 {
8804 unresolved_reloc = TRUE;
8805 break;
8806 }
8807
8808 name = bfd_get_section_name (output_bfd, sec->output_section);
8809 if (strcmp (name, ".sdata") == 0
8810 || strcmp (name, ".sbss") == 0)
8811 {
8812 reg = 13;
8813 sda = htab->sdata[0].sym;
8814 }
8815 else if (strcmp (name, ".sdata2") == 0
8816 || strcmp (name, ".sbss2") == 0)
8817 {
8818 reg = 2;
8819 sda = htab->sdata[1].sym;
8820 }
8821 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8822 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8823 {
8824 reg = 0;
8825 }
8826 else
8827 {
8828 info->callbacks->einfo
8829 (_("%P: %B: the target (%s) of a %s relocation is "
8830 "in the wrong output section (%s)\n"),
8831 input_bfd,
8832 sym_name,
8833 howto->name,
8834 name);
8835
8836 bfd_set_error (bfd_error_bad_value);
8837 ret = FALSE;
8838 continue;
8839 }
8840
8841 if (sda != NULL)
8842 {
8843 if (!is_static_defined (sda))
8844 {
8845 unresolved_reloc = TRUE;
8846 break;
8847 }
8848 addend -= SYM_VAL (sda);
8849 }
8850
8851 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8852 if (reg == 0
8853 && (r_type == R_PPC_VLE_SDA21
8854 || r_type == R_PPC_VLE_SDA21_LO))
8855 {
8856 relocation = relocation + addend;
8857 addend = 0;
8858
8859 /* Force e_li insn, keeping RT from original insn. */
8860 insn &= 0x1f << 21;
8861 insn |= 28u << 26;
8862
8863 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8864 /* Top 4 bits of value to 17..20. */
8865 insn |= (relocation & 0xf0000) >> 5;
8866 /* Next 5 bits of the value to 11..15. */
8867 insn |= (relocation & 0xf800) << 5;
8868 /* And the final 11 bits of the value to bits 21 to 31. */
8869 insn |= relocation & 0x7ff;
8870
8871 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8872
8873 if (r_type == R_PPC_VLE_SDA21
8874 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8875 goto overflow;
8876 continue;
8877 }
8878 else if (r_type == R_PPC_EMB_SDA21
8879 || r_type == R_PPC_VLE_SDA21
8880 || r_type == R_PPC_VLE_SDA21_LO)
8881 {
8882 /* Fill in register field. */
8883 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8884 }
8885 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8886 }
8887 break;
8888
8889 case R_PPC_VLE_SDAREL_LO16A:
8890 case R_PPC_VLE_SDAREL_LO16D:
8891 case R_PPC_VLE_SDAREL_HI16A:
8892 case R_PPC_VLE_SDAREL_HI16D:
8893 case R_PPC_VLE_SDAREL_HA16A:
8894 case R_PPC_VLE_SDAREL_HA16D:
8895 {
8896 bfd_vma value;
8897 const char *name;
8898 //int reg;
8899 struct elf_link_hash_entry *sda = NULL;
8900
8901 if (sec == NULL || sec->output_section == NULL)
8902 {
8903 unresolved_reloc = TRUE;
8904 break;
8905 }
8906
8907 name = bfd_get_section_name (output_bfd, sec->output_section);
8908 if (strcmp (name, ".sdata") == 0
8909 || strcmp (name, ".sbss") == 0)
8910 {
8911 //reg = 13;
8912 sda = htab->sdata[0].sym;
8913 }
8914 else if (strcmp (name, ".sdata2") == 0
8915 || strcmp (name, ".sbss2") == 0)
8916 {
8917 //reg = 2;
8918 sda = htab->sdata[1].sym;
8919 }
8920 else
8921 {
8922 (*_bfd_error_handler)
8923 (_("%B: the target (%s) of a %s relocation is "
8924 "in the wrong output section (%s)"),
8925 input_bfd,
8926 sym_name,
8927 howto->name,
8928 name);
8929
8930 bfd_set_error (bfd_error_bad_value);
8931 ret = FALSE;
8932 continue;
8933 }
8934
8935 if (sda != NULL)
8936 {
8937 if (!is_static_defined (sda))
8938 {
8939 unresolved_reloc = TRUE;
8940 break;
8941 }
8942 }
8943
8944 value = (sda->root.u.def.section->output_section->vma
8945 + sda->root.u.def.section->output_offset
8946 + addend);
8947
8948 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8949 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8950 value, split16a_type);
8951 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8952 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8953 value, split16d_type);
8954 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8955 {
8956 value = value >> 16;
8957 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8958 value, split16a_type);
8959 }
8960 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8961 {
8962 value = value >> 16;
8963 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8964 value, split16d_type);
8965 }
8966 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8967 {
8968 value = (value + 0x8000) >> 16;
8969 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8970 value, split16a_type);
8971 }
8972 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8973 {
8974 value = (value + 0x8000) >> 16;
8975 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8976 value, split16d_type);
8977 }
8978 }
8979 continue;
8980
8981 /* Relocate against the beginning of the section. */
8982 case R_PPC_SECTOFF:
8983 case R_PPC_SECTOFF_LO:
8984 case R_PPC_SECTOFF_HI:
8985 case R_PPC_SECTOFF_HA:
8986 if (sec == NULL || sec->output_section == NULL)
8987 {
8988 unresolved_reloc = TRUE;
8989 break;
8990 }
8991 addend -= sec->output_section->vma;
8992 break;
8993
8994 /* Negative relocations. */
8995 case R_PPC_EMB_NADDR32:
8996 case R_PPC_EMB_NADDR16:
8997 case R_PPC_EMB_NADDR16_LO:
8998 case R_PPC_EMB_NADDR16_HI:
8999 case R_PPC_EMB_NADDR16_HA:
9000 addend -= 2 * relocation;
9001 break;
9002
9003 case R_PPC_COPY:
9004 case R_PPC_GLOB_DAT:
9005 case R_PPC_JMP_SLOT:
9006 case R_PPC_RELATIVE:
9007 case R_PPC_IRELATIVE:
9008 case R_PPC_PLT32:
9009 case R_PPC_PLTREL32:
9010 case R_PPC_PLT16_LO:
9011 case R_PPC_PLT16_HI:
9012 case R_PPC_PLT16_HA:
9013 case R_PPC_ADDR30:
9014 case R_PPC_EMB_RELSEC16:
9015 case R_PPC_EMB_RELST_LO:
9016 case R_PPC_EMB_RELST_HI:
9017 case R_PPC_EMB_RELST_HA:
9018 case R_PPC_EMB_BIT_FLD:
9019 info->callbacks->einfo
9020 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9021 input_bfd,
9022 howto->name,
9023 sym_name);
9024
9025 bfd_set_error (bfd_error_invalid_operation);
9026 ret = FALSE;
9027 continue;
9028 }
9029
9030 /* Do any further special processing. */
9031 switch (r_type)
9032 {
9033 default:
9034 break;
9035
9036 case R_PPC_ADDR16_HA:
9037 case R_PPC_REL16_HA:
9038 case R_PPC_SECTOFF_HA:
9039 case R_PPC_TPREL16_HA:
9040 case R_PPC_DTPREL16_HA:
9041 case R_PPC_EMB_NADDR16_HA:
9042 case R_PPC_EMB_RELST_HA:
9043 /* It's just possible that this symbol is a weak symbol
9044 that's not actually defined anywhere. In that case,
9045 'sec' would be NULL, and we should leave the symbol
9046 alone (it will be set to zero elsewhere in the link). */
9047 if (sec == NULL)
9048 break;
9049 /* Fall thru */
9050
9051 case R_PPC_PLT16_HA:
9052 case R_PPC_GOT16_HA:
9053 case R_PPC_GOT_TLSGD16_HA:
9054 case R_PPC_GOT_TLSLD16_HA:
9055 case R_PPC_GOT_TPREL16_HA:
9056 case R_PPC_GOT_DTPREL16_HA:
9057 /* Add 0x10000 if sign bit in 0:15 is set.
9058 Bits 0:15 are not used. */
9059 addend += 0x8000;
9060 break;
9061
9062 case R_PPC_ADDR16:
9063 case R_PPC_ADDR16_LO:
9064 case R_PPC_GOT16:
9065 case R_PPC_GOT16_LO:
9066 case R_PPC_SDAREL16:
9067 case R_PPC_SECTOFF:
9068 case R_PPC_SECTOFF_LO:
9069 case R_PPC_DTPREL16:
9070 case R_PPC_DTPREL16_LO:
9071 case R_PPC_TPREL16:
9072 case R_PPC_TPREL16_LO:
9073 case R_PPC_GOT_TLSGD16:
9074 case R_PPC_GOT_TLSGD16_LO:
9075 case R_PPC_GOT_TLSLD16:
9076 case R_PPC_GOT_TLSLD16_LO:
9077 case R_PPC_GOT_DTPREL16:
9078 case R_PPC_GOT_DTPREL16_LO:
9079 case R_PPC_GOT_TPREL16:
9080 case R_PPC_GOT_TPREL16_LO:
9081 {
9082 /* The 32-bit ABI lacks proper relocations to deal with
9083 certain 64-bit instructions. Prevent damage to bits
9084 that make up part of the insn opcode. */
9085 unsigned int insn, mask, lobit;
9086
9087 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9088 mask = 0;
9089 if (is_insn_ds_form (insn))
9090 mask = 3;
9091 else if (is_insn_dq_form (insn))
9092 mask = 15;
9093 else
9094 break;
9095 lobit = mask & (relocation + addend);
9096 if (lobit != 0)
9097 {
9098 addend -= lobit;
9099 info->callbacks->einfo
9100 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9101 input_bfd, input_section, rel->r_offset,
9102 howto->name, sym_name, mask + 1);
9103 bfd_set_error (bfd_error_bad_value);
9104 ret = FALSE;
9105 }
9106 addend += insn & mask;
9107 }
9108 break;
9109 }
9110
9111 #ifdef DEBUG
9112 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9113 "offset = %ld, addend = %ld\n",
9114 howto->name,
9115 (int) r_type,
9116 sym_name,
9117 r_symndx,
9118 (long) rel->r_offset,
9119 (long) addend);
9120 #endif
9121
9122 if (unresolved_reloc
9123 && !((input_section->flags & SEC_DEBUGGING) != 0
9124 && h->def_dynamic)
9125 && _bfd_elf_section_offset (output_bfd, info, input_section,
9126 rel->r_offset) != (bfd_vma) -1)
9127 {
9128 info->callbacks->einfo
9129 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9130 input_bfd, input_section, rel->r_offset,
9131 howto->name,
9132 sym_name);
9133 ret = FALSE;
9134 }
9135
9136 /* 16-bit fields in insns mostly have signed values, but a
9137 few insns have 16-bit unsigned values. Really, we should
9138 have different reloc types. */
9139 if (howto->complain_on_overflow != complain_overflow_dont
9140 && howto->dst_mask == 0xffff
9141 && (input_section->flags & SEC_CODE) != 0)
9142 {
9143 enum complain_overflow complain = complain_overflow_signed;
9144
9145 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9146 {
9147 unsigned int insn;
9148
9149 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9150 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9151 complain = complain_overflow_bitfield;
9152 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9153 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9154 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9155 complain = complain_overflow_unsigned;
9156 }
9157 if (howto->complain_on_overflow != complain)
9158 {
9159 alt_howto = *howto;
9160 alt_howto.complain_on_overflow = complain;
9161 howto = &alt_howto;
9162 }
9163 }
9164
9165 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9166 rel->r_offset, relocation, addend);
9167
9168 if (r != bfd_reloc_ok)
9169 {
9170 if (r == bfd_reloc_overflow)
9171 {
9172 overflow:
9173 if (warned)
9174 continue;
9175 if (h != NULL
9176 && h->root.type == bfd_link_hash_undefweak
9177 && howto->pc_relative)
9178 {
9179 /* Assume this is a call protected by other code that
9180 detect the symbol is undefined. If this is the case,
9181 we can safely ignore the overflow. If not, the
9182 program is hosed anyway, and a little warning isn't
9183 going to help. */
9184
9185 continue;
9186 }
9187
9188 if (! (*info->callbacks->reloc_overflow) (info,
9189 (h ? &h->root : NULL),
9190 sym_name,
9191 howto->name,
9192 rel->r_addend,
9193 input_bfd,
9194 input_section,
9195 rel->r_offset))
9196 return FALSE;
9197 }
9198 else
9199 {
9200 info->callbacks->einfo
9201 (_("%P: %H: %s reloc against `%s': error %d\n"),
9202 input_bfd, input_section, rel->r_offset,
9203 howto->name, sym_name, (int) r);
9204 ret = FALSE;
9205 }
9206 }
9207 }
9208
9209 #ifdef DEBUG
9210 fprintf (stderr, "\n");
9211 #endif
9212
9213 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9214 && input_section->size != input_section->rawsize
9215 && (strcmp (input_section->output_section->name, ".init") == 0
9216 || strcmp (input_section->output_section->name, ".fini") == 0))
9217 {
9218 /* Branch around the trampolines. */
9219 unsigned int insn = B + input_section->size - input_section->rawsize;
9220 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9221 }
9222
9223 if (htab->params->ppc476_workaround
9224 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9225 && (!info->relocatable
9226 || (input_section->output_section->alignment_power
9227 >= htab->params->pagesize_p2)))
9228 {
9229 struct ppc_elf_relax_info *relax_info;
9230 bfd_vma start_addr, end_addr, addr;
9231 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9232
9233 relax_info = elf_section_data (input_section)->sec_info;
9234 if (relax_info->workaround_size != 0)
9235 {
9236 bfd_byte *p;
9237 unsigned int n;
9238 bfd_byte fill[4];
9239
9240 bfd_put_32 (input_bfd, BA, fill);
9241 p = contents + input_section->size - relax_info->workaround_size;
9242 n = relax_info->workaround_size >> 2;
9243 while (n--)
9244 {
9245 memcpy (p, fill, 4);
9246 p += 4;
9247 }
9248 }
9249
9250 /* The idea is: Replace the last instruction on a page with a
9251 branch to a patch area. Put the insn there followed by a
9252 branch back to the next page. Complicated a little by
9253 needing to handle moved conditional branches, and by not
9254 wanting to touch data-in-text. */
9255
9256 start_addr = (input_section->output_section->vma
9257 + input_section->output_offset);
9258 end_addr = (start_addr + input_section->size
9259 - relax_info->workaround_size);
9260 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9261 addr < end_addr;
9262 addr += pagesize)
9263 {
9264 bfd_vma offset = addr - start_addr;
9265 Elf_Internal_Rela *lo, *hi;
9266 bfd_boolean is_data;
9267 bfd_vma patch_off, patch_addr;
9268 unsigned int insn;
9269
9270 /* Do we have a data reloc at this offset? If so, leave
9271 the word alone. */
9272 is_data = FALSE;
9273 lo = relocs;
9274 hi = relend;
9275 rel = NULL;
9276 while (lo < hi)
9277 {
9278 rel = lo + (hi - lo) / 2;
9279 if (rel->r_offset < offset)
9280 lo = rel + 1;
9281 else if (rel->r_offset > offset + 3)
9282 hi = rel;
9283 else
9284 {
9285 switch (ELF32_R_TYPE (rel->r_info))
9286 {
9287 case R_PPC_ADDR32:
9288 case R_PPC_UADDR32:
9289 case R_PPC_REL32:
9290 case R_PPC_ADDR30:
9291 is_data = TRUE;
9292 break;
9293 default:
9294 break;
9295 }
9296 break;
9297 }
9298 }
9299 if (is_data)
9300 continue;
9301
9302 /* Some instructions can be left alone too. Unconditional
9303 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9304 avoid the icache failure.
9305
9306 The problem occurs due to prefetch across a page boundary
9307 where stale instructions can be fetched from the next
9308 page, and the mechanism for flushing these bad
9309 instructions fails under certain circumstances. The
9310 unconditional branches:
9311 1) Branch: b, bl, ba, bla,
9312 2) Branch Conditional: bc, bca, bcl, bcla,
9313 3) Branch Conditional to Link Register: bclr, bclrl,
9314 where (2) and (3) have BO=0x14 making them unconditional,
9315 prevent the bad prefetch because the prefetch itself is
9316 affected by these instructions. This happens even if the
9317 instruction is not executed.
9318
9319 A bctr example:
9320 .
9321 . lis 9,new_page@ha
9322 . addi 9,9,new_page@l
9323 . mtctr 9
9324 . bctr
9325 . nop
9326 . nop
9327 . new_page:
9328 .
9329 The bctr is not predicted taken due to ctr not being
9330 ready, so prefetch continues on past the bctr into the
9331 new page which might have stale instructions. If they
9332 fail to be flushed, then they will be executed after the
9333 bctr executes. Either of the following modifications
9334 prevent the bad prefetch from happening in the first
9335 place:
9336 .
9337 . lis 9,new_page@ha lis 9,new_page@ha
9338 . addi 9,9,new_page@l addi 9,9,new_page@l
9339 . mtctr 9 mtctr 9
9340 . bctr bctr
9341 . nop b somewhere_else
9342 . b somewhere_else nop
9343 . new_page: new_page:
9344 . */
9345 insn = bfd_get_32 (input_bfd, contents + offset);
9346 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9347 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9348 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9349 || ((insn & (0x3f << 26)) == (19u << 26)
9350 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9351 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9352 continue;
9353
9354 patch_addr = (start_addr + input_section->size
9355 - relax_info->workaround_size);
9356 patch_addr = (patch_addr + 15) & -16;
9357 patch_off = patch_addr - start_addr;
9358 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9359
9360 if (rel != NULL
9361 && rel->r_offset >= offset
9362 && rel->r_offset < offset + 4)
9363 {
9364 /* If the insn we are patching had a reloc, adjust the
9365 reloc r_offset so that the reloc applies to the moved
9366 location. This matters for -r and --emit-relocs. */
9367 if (rel + 1 != relend)
9368 {
9369 Elf_Internal_Rela tmp = *rel;
9370
9371 /* Keep the relocs sorted by r_offset. */
9372 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9373 relend[-1] = tmp;
9374 }
9375 relend[-1].r_offset += patch_off - offset;
9376 }
9377 else
9378 rel = NULL;
9379
9380 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9381 && (insn & 2) == 0 /* relative */)
9382 {
9383 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9384
9385 delta += offset - patch_off;
9386 if (info->relocatable && rel != NULL)
9387 delta = 0;
9388 if (!info->relocatable && rel != NULL)
9389 {
9390 enum elf_ppc_reloc_type r_type;
9391
9392 r_type = ELF32_R_TYPE (relend[-1].r_info);
9393 if (r_type == R_PPC_REL14_BRTAKEN)
9394 insn |= BRANCH_PREDICT_BIT;
9395 else if (r_type == R_PPC_REL14_BRNTAKEN)
9396 insn &= ~BRANCH_PREDICT_BIT;
9397 else
9398 BFD_ASSERT (r_type == R_PPC_REL14);
9399
9400 if ((r_type == R_PPC_REL14_BRTAKEN
9401 || r_type == R_PPC_REL14_BRNTAKEN)
9402 && delta + 0x8000 < 0x10000
9403 && (bfd_signed_vma) delta < 0)
9404 insn ^= BRANCH_PREDICT_BIT;
9405 }
9406 if (delta + 0x8000 < 0x10000)
9407 {
9408 bfd_put_32 (input_bfd,
9409 (insn & ~0xfffc) | (delta & 0xfffc),
9410 contents + patch_off);
9411 patch_off += 4;
9412 bfd_put_32 (input_bfd,
9413 B | ((offset + 4 - patch_off) & 0x3fffffc),
9414 contents + patch_off);
9415 patch_off += 4;
9416 }
9417 else
9418 {
9419 if (rel != NULL)
9420 {
9421 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9422
9423 relend[-1].r_offset += 8;
9424 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9425 }
9426 bfd_put_32 (input_bfd,
9427 (insn & ~0xfffc) | 8,
9428 contents + patch_off);
9429 patch_off += 4;
9430 bfd_put_32 (input_bfd,
9431 B | ((offset + 4 - patch_off) & 0x3fffffc),
9432 contents + patch_off);
9433 patch_off += 4;
9434 bfd_put_32 (input_bfd,
9435 B | ((delta - 8) & 0x3fffffc),
9436 contents + patch_off);
9437 patch_off += 4;
9438 }
9439 }
9440 else
9441 {
9442 bfd_put_32 (input_bfd, insn, contents + patch_off);
9443 patch_off += 4;
9444 bfd_put_32 (input_bfd,
9445 B | ((offset + 4 - patch_off) & 0x3fffffc),
9446 contents + patch_off);
9447 patch_off += 4;
9448 }
9449 BFD_ASSERT (patch_off <= input_section->size);
9450 relax_info->workaround_size = input_section->size - patch_off;
9451 }
9452 }
9453
9454 return ret;
9455 }
9456 \f
9457 /* Finish up dynamic symbol handling. We set the contents of various
9458 dynamic sections here. */
9459
9460 static bfd_boolean
9461 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9462 struct bfd_link_info *info,
9463 struct elf_link_hash_entry *h,
9464 Elf_Internal_Sym *sym)
9465 {
9466 struct ppc_elf_link_hash_table *htab;
9467 struct plt_entry *ent;
9468 bfd_boolean doneone;
9469
9470 #ifdef DEBUG
9471 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9472 h->root.root.string);
9473 #endif
9474
9475 htab = ppc_elf_hash_table (info);
9476 BFD_ASSERT (htab->elf.dynobj != NULL);
9477
9478 doneone = FALSE;
9479 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9480 if (ent->plt.offset != (bfd_vma) -1)
9481 {
9482 if (!doneone)
9483 {
9484 Elf_Internal_Rela rela;
9485 bfd_byte *loc;
9486 bfd_vma reloc_index;
9487
9488 if (htab->plt_type == PLT_NEW
9489 || !htab->elf.dynamic_sections_created
9490 || h->dynindx == -1)
9491 reloc_index = ent->plt.offset / 4;
9492 else
9493 {
9494 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9495 / htab->plt_slot_size);
9496 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9497 && htab->plt_type == PLT_OLD)
9498 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9499 }
9500
9501 /* This symbol has an entry in the procedure linkage table.
9502 Set it up. */
9503 if (htab->plt_type == PLT_VXWORKS
9504 && htab->elf.dynamic_sections_created
9505 && h->dynindx != -1)
9506 {
9507 bfd_vma got_offset;
9508 const bfd_vma *plt_entry;
9509
9510 /* The first three entries in .got.plt are reserved. */
9511 got_offset = (reloc_index + 3) * 4;
9512
9513 /* Use the right PLT. */
9514 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9515 : ppc_elf_vxworks_plt_entry;
9516
9517 /* Fill in the .plt on VxWorks. */
9518 if (info->shared)
9519 {
9520 bfd_put_32 (output_bfd,
9521 plt_entry[0] | PPC_HA (got_offset),
9522 htab->plt->contents + ent->plt.offset + 0);
9523 bfd_put_32 (output_bfd,
9524 plt_entry[1] | PPC_LO (got_offset),
9525 htab->plt->contents + ent->plt.offset + 4);
9526 }
9527 else
9528 {
9529 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9530
9531 bfd_put_32 (output_bfd,
9532 plt_entry[0] | PPC_HA (got_loc),
9533 htab->plt->contents + ent->plt.offset + 0);
9534 bfd_put_32 (output_bfd,
9535 plt_entry[1] | PPC_LO (got_loc),
9536 htab->plt->contents + ent->plt.offset + 4);
9537 }
9538
9539 bfd_put_32 (output_bfd, plt_entry[2],
9540 htab->plt->contents + ent->plt.offset + 8);
9541 bfd_put_32 (output_bfd, plt_entry[3],
9542 htab->plt->contents + ent->plt.offset + 12);
9543
9544 /* This instruction is an immediate load. The value loaded is
9545 the byte offset of the R_PPC_JMP_SLOT relocation from the
9546 start of the .rela.plt section. The value is stored in the
9547 low-order 16 bits of the load instruction. */
9548 /* NOTE: It appears that this is now an index rather than a
9549 prescaled offset. */
9550 bfd_put_32 (output_bfd,
9551 plt_entry[4] | reloc_index,
9552 htab->plt->contents + ent->plt.offset + 16);
9553 /* This instruction is a PC-relative branch whose target is
9554 the start of the PLT section. The address of this branch
9555 instruction is 20 bytes beyond the start of this PLT entry.
9556 The address is encoded in bits 6-29, inclusive. The value
9557 stored is right-shifted by two bits, permitting a 26-bit
9558 offset. */
9559 bfd_put_32 (output_bfd,
9560 (plt_entry[5]
9561 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9562 htab->plt->contents + ent->plt.offset + 20);
9563 bfd_put_32 (output_bfd, plt_entry[6],
9564 htab->plt->contents + ent->plt.offset + 24);
9565 bfd_put_32 (output_bfd, plt_entry[7],
9566 htab->plt->contents + ent->plt.offset + 28);
9567
9568 /* Fill in the GOT entry corresponding to this PLT slot with
9569 the address immediately after the "bctr" instruction
9570 in this PLT entry. */
9571 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9572 + htab->plt->output_offset
9573 + ent->plt.offset + 16),
9574 htab->sgotplt->contents + got_offset);
9575
9576 if (!info->shared)
9577 {
9578 /* Fill in a couple of entries in .rela.plt.unloaded. */
9579 loc = htab->srelplt2->contents
9580 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9581 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9582 * sizeof (Elf32_External_Rela));
9583
9584 /* Provide the @ha relocation for the first instruction. */
9585 rela.r_offset = (htab->plt->output_section->vma
9586 + htab->plt->output_offset
9587 + ent->plt.offset + 2);
9588 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9589 R_PPC_ADDR16_HA);
9590 rela.r_addend = got_offset;
9591 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9592 loc += sizeof (Elf32_External_Rela);
9593
9594 /* Provide the @l relocation for the second instruction. */
9595 rela.r_offset = (htab->plt->output_section->vma
9596 + htab->plt->output_offset
9597 + ent->plt.offset + 6);
9598 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9599 R_PPC_ADDR16_LO);
9600 rela.r_addend = got_offset;
9601 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9602 loc += sizeof (Elf32_External_Rela);
9603
9604 /* Provide a relocation for the GOT entry corresponding to this
9605 PLT slot. Point it at the middle of the .plt entry. */
9606 rela.r_offset = (htab->sgotplt->output_section->vma
9607 + htab->sgotplt->output_offset
9608 + got_offset);
9609 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9610 R_PPC_ADDR32);
9611 rela.r_addend = ent->plt.offset + 16;
9612 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9613 }
9614
9615 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9616 In particular, the offset for the relocation is not the
9617 address of the PLT entry for this function, as specified
9618 by the ABI. Instead, the offset is set to the address of
9619 the GOT slot for this function. See EABI 4.4.4.1. */
9620 rela.r_offset = (htab->sgotplt->output_section->vma
9621 + htab->sgotplt->output_offset
9622 + got_offset);
9623
9624 }
9625 else
9626 {
9627 asection *splt = htab->plt;
9628 if (!htab->elf.dynamic_sections_created
9629 || h->dynindx == -1)
9630 splt = htab->iplt;
9631
9632 rela.r_offset = (splt->output_section->vma
9633 + splt->output_offset
9634 + ent->plt.offset);
9635 if (htab->plt_type == PLT_OLD
9636 || !htab->elf.dynamic_sections_created
9637 || h->dynindx == -1)
9638 {
9639 /* We don't need to fill in the .plt. The ppc dynamic
9640 linker will fill it in. */
9641 }
9642 else
9643 {
9644 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9645 + htab->glink->output_section->vma
9646 + htab->glink->output_offset);
9647 bfd_put_32 (output_bfd, val,
9648 splt->contents + ent->plt.offset);
9649 }
9650 }
9651
9652 /* Fill in the entry in the .rela.plt section. */
9653 rela.r_addend = 0;
9654 if (!htab->elf.dynamic_sections_created
9655 || h->dynindx == -1)
9656 {
9657 BFD_ASSERT (h->type == STT_GNU_IFUNC
9658 && h->def_regular
9659 && (h->root.type == bfd_link_hash_defined
9660 || h->root.type == bfd_link_hash_defweak));
9661 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9662 rela.r_addend = SYM_VAL (h);
9663 }
9664 else
9665 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9666
9667 if (!htab->elf.dynamic_sections_created
9668 || h->dynindx == -1)
9669 loc = (htab->reliplt->contents
9670 + (htab->reliplt->reloc_count++
9671 * sizeof (Elf32_External_Rela)));
9672 else
9673 loc = (htab->relplt->contents
9674 + reloc_index * sizeof (Elf32_External_Rela));
9675 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9676
9677 if (!h->def_regular)
9678 {
9679 /* Mark the symbol as undefined, rather than as
9680 defined in the .plt section. Leave the value if
9681 there were any relocations where pointer equality
9682 matters (this is a clue for the dynamic linker, to
9683 make function pointer comparisons work between an
9684 application and shared library), otherwise set it
9685 to zero. */
9686 sym->st_shndx = SHN_UNDEF;
9687 if (!h->pointer_equality_needed)
9688 sym->st_value = 0;
9689 else if (!h->ref_regular_nonweak)
9690 {
9691 /* This breaks function pointer comparisons, but
9692 that is better than breaking tests for a NULL
9693 function pointer. */
9694 sym->st_value = 0;
9695 }
9696 }
9697 else if (h->type == STT_GNU_IFUNC
9698 && !info->shared)
9699 {
9700 /* Set the value of ifunc symbols in a non-pie
9701 executable to the glink entry. This is to avoid
9702 text relocations. We can't do this for ifunc in
9703 allocate_dynrelocs, as we do for normal dynamic
9704 function symbols with plt entries, because we need
9705 to keep the original value around for the ifunc
9706 relocation. */
9707 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9708 (output_bfd, htab->glink->output_section));
9709 sym->st_value = (ent->glink_offset
9710 + htab->glink->output_offset
9711 + htab->glink->output_section->vma);
9712 }
9713 doneone = TRUE;
9714 }
9715
9716 if (htab->plt_type == PLT_NEW
9717 || !htab->elf.dynamic_sections_created
9718 || h->dynindx == -1)
9719 {
9720 unsigned char *p;
9721 asection *splt = htab->plt;
9722 if (!htab->elf.dynamic_sections_created
9723 || h->dynindx == -1)
9724 splt = htab->iplt;
9725
9726 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9727
9728 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9729 {
9730 bfd_put_32 (output_bfd, LWZ_11_3, p);
9731 p += 4;
9732 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9733 p += 4;
9734 bfd_put_32 (output_bfd, MR_0_3, p);
9735 p += 4;
9736 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9737 p += 4;
9738 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9739 p += 4;
9740 bfd_put_32 (output_bfd, BEQLR, p);
9741 p += 4;
9742 bfd_put_32 (output_bfd, MR_3_0, p);
9743 p += 4;
9744 bfd_put_32 (output_bfd, NOP, p);
9745 p += 4;
9746 }
9747
9748 write_glink_stub (ent, splt, p, info);
9749
9750 if (!info->shared)
9751 /* We only need one non-PIC glink stub. */
9752 break;
9753 }
9754 else
9755 break;
9756 }
9757
9758 if (h->needs_copy)
9759 {
9760 asection *s;
9761 Elf_Internal_Rela rela;
9762 bfd_byte *loc;
9763
9764 /* This symbols needs a copy reloc. Set it up. */
9765
9766 #ifdef DEBUG
9767 fprintf (stderr, ", copy");
9768 #endif
9769
9770 BFD_ASSERT (h->dynindx != -1);
9771
9772 if (ppc_elf_hash_entry (h)->has_sda_refs)
9773 s = htab->relsbss;
9774 else
9775 s = htab->relbss;
9776 BFD_ASSERT (s != NULL);
9777
9778 rela.r_offset = SYM_VAL (h);
9779 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9780 rela.r_addend = 0;
9781 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9782 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9783 }
9784
9785 #ifdef DEBUG
9786 fprintf (stderr, "\n");
9787 #endif
9788
9789 return TRUE;
9790 }
9791 \f
9792 static enum elf_reloc_type_class
9793 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9794 const asection *rel_sec,
9795 const Elf_Internal_Rela *rela)
9796 {
9797 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9798
9799 if (rel_sec == htab->reliplt)
9800 return reloc_class_ifunc;
9801
9802 switch (ELF32_R_TYPE (rela->r_info))
9803 {
9804 case R_PPC_RELATIVE:
9805 return reloc_class_relative;
9806 case R_PPC_JMP_SLOT:
9807 return reloc_class_plt;
9808 case R_PPC_COPY:
9809 return reloc_class_copy;
9810 default:
9811 return reloc_class_normal;
9812 }
9813 }
9814 \f
9815 /* Finish up the dynamic sections. */
9816
9817 static bfd_boolean
9818 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9819 struct bfd_link_info *info)
9820 {
9821 asection *sdyn;
9822 asection *splt;
9823 struct ppc_elf_link_hash_table *htab;
9824 bfd_vma got;
9825 bfd *dynobj;
9826 bfd_boolean ret = TRUE;
9827
9828 #ifdef DEBUG
9829 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9830 #endif
9831
9832 htab = ppc_elf_hash_table (info);
9833 dynobj = elf_hash_table (info)->dynobj;
9834 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9835 if (htab->is_vxworks)
9836 splt = bfd_get_linker_section (dynobj, ".plt");
9837 else
9838 splt = NULL;
9839
9840 got = 0;
9841 if (htab->elf.hgot != NULL)
9842 got = SYM_VAL (htab->elf.hgot);
9843
9844 if (htab->elf.dynamic_sections_created)
9845 {
9846 Elf32_External_Dyn *dyncon, *dynconend;
9847
9848 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9849
9850 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9851 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9852 for (; dyncon < dynconend; dyncon++)
9853 {
9854 Elf_Internal_Dyn dyn;
9855 asection *s;
9856
9857 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9858
9859 switch (dyn.d_tag)
9860 {
9861 case DT_PLTGOT:
9862 if (htab->is_vxworks)
9863 s = htab->sgotplt;
9864 else
9865 s = htab->plt;
9866 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9867 break;
9868
9869 case DT_PLTRELSZ:
9870 dyn.d_un.d_val = htab->relplt->size;
9871 break;
9872
9873 case DT_JMPREL:
9874 s = htab->relplt;
9875 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9876 break;
9877
9878 case DT_PPC_GOT:
9879 dyn.d_un.d_ptr = got;
9880 break;
9881
9882 case DT_RELASZ:
9883 if (htab->is_vxworks)
9884 {
9885 if (htab->relplt)
9886 dyn.d_un.d_ptr -= htab->relplt->size;
9887 break;
9888 }
9889 continue;
9890
9891 default:
9892 if (htab->is_vxworks
9893 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9894 break;
9895 continue;
9896 }
9897
9898 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9899 }
9900 }
9901
9902 if (htab->got != NULL)
9903 {
9904 if (htab->elf.hgot->root.u.def.section == htab->got
9905 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9906 {
9907 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9908
9909 p += htab->elf.hgot->root.u.def.value;
9910 if (htab->plt_type == PLT_OLD)
9911 {
9912 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9913 so that a function can easily find the address of
9914 _GLOBAL_OFFSET_TABLE_. */
9915 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9916 < htab->elf.hgot->root.u.def.section->size);
9917 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9918 }
9919
9920 if (sdyn != NULL)
9921 {
9922 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9923 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9924 < htab->elf.hgot->root.u.def.section->size);
9925 bfd_put_32 (output_bfd, val, p);
9926 }
9927 }
9928 else
9929 {
9930 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9931 htab->elf.hgot->root.root.string,
9932 (htab->sgotplt != NULL
9933 ? htab->sgotplt->name : htab->got->name));
9934 bfd_set_error (bfd_error_bad_value);
9935 ret = FALSE;
9936 }
9937
9938 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9939 }
9940
9941 /* Fill in the first entry in the VxWorks procedure linkage table. */
9942 if (splt && splt->size > 0)
9943 {
9944 /* Use the right PLT. */
9945 const bfd_vma *plt_entry = (info->shared
9946 ? ppc_elf_vxworks_pic_plt0_entry
9947 : ppc_elf_vxworks_plt0_entry);
9948
9949 if (!info->shared)
9950 {
9951 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9952
9953 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9954 splt->contents + 0);
9955 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9956 splt->contents + 4);
9957 }
9958 else
9959 {
9960 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9961 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9962 }
9963 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9964 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9965 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9966 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9967 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9968 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9969
9970 if (! info->shared)
9971 {
9972 Elf_Internal_Rela rela;
9973 bfd_byte *loc;
9974
9975 loc = htab->srelplt2->contents;
9976
9977 /* Output the @ha relocation for the first instruction. */
9978 rela.r_offset = (htab->plt->output_section->vma
9979 + htab->plt->output_offset
9980 + 2);
9981 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9982 rela.r_addend = 0;
9983 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9984 loc += sizeof (Elf32_External_Rela);
9985
9986 /* Output the @l relocation for the second instruction. */
9987 rela.r_offset = (htab->plt->output_section->vma
9988 + htab->plt->output_offset
9989 + 6);
9990 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9991 rela.r_addend = 0;
9992 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9993 loc += sizeof (Elf32_External_Rela);
9994
9995 /* Fix up the remaining relocations. They may have the wrong
9996 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9997 in which symbols were output. */
9998 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9999 {
10000 Elf_Internal_Rela rel;
10001
10002 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10003 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10004 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10005 loc += sizeof (Elf32_External_Rela);
10006
10007 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10008 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10009 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10010 loc += sizeof (Elf32_External_Rela);
10011
10012 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10013 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10014 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10015 loc += sizeof (Elf32_External_Rela);
10016 }
10017 }
10018 }
10019
10020 if (htab->glink != NULL
10021 && htab->glink->contents != NULL
10022 && htab->elf.dynamic_sections_created)
10023 {
10024 unsigned char *p;
10025 unsigned char *endp;
10026 bfd_vma res0;
10027 unsigned int i;
10028
10029 /*
10030 * PIC glink code is the following:
10031 *
10032 * # ith PLT code stub.
10033 * addis 11,30,(plt+(i-1)*4-got)@ha
10034 * lwz 11,(plt+(i-1)*4-got)@l(11)
10035 * mtctr 11
10036 * bctr
10037 *
10038 * # A table of branches, one for each plt entry.
10039 * # The idea is that the plt call stub loads ctr and r11 with these
10040 * # addresses, so (r11 - res_0) gives the plt index * 4.
10041 * res_0: b PLTresolve
10042 * res_1: b PLTresolve
10043 * .
10044 * # Some number of entries towards the end can be nops
10045 * res_n_m3: nop
10046 * res_n_m2: nop
10047 * res_n_m1:
10048 *
10049 * PLTresolve:
10050 * addis 11,11,(1f-res_0)@ha
10051 * mflr 0
10052 * bcl 20,31,1f
10053 * 1: addi 11,11,(1b-res_0)@l
10054 * mflr 12
10055 * mtlr 0
10056 * sub 11,11,12 # r11 = index * 4
10057 * addis 12,12,(got+4-1b)@ha
10058 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10059 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10060 * mtctr 0
10061 * add 0,11,11
10062 * add 11,0,11 # r11 = index * 12 = reloc offset.
10063 * bctr
10064 */
10065 static const unsigned int pic_plt_resolve[] =
10066 {
10067 ADDIS_11_11,
10068 MFLR_0,
10069 BCL_20_31,
10070 ADDI_11_11,
10071 MFLR_12,
10072 MTLR_0,
10073 SUB_11_11_12,
10074 ADDIS_12_12,
10075 LWZ_0_12,
10076 LWZ_12_12,
10077 MTCTR_0,
10078 ADD_0_11_11,
10079 ADD_11_0_11,
10080 BCTR,
10081 NOP,
10082 NOP
10083 };
10084
10085 /*
10086 * Non-PIC glink code is a little simpler.
10087 *
10088 * # ith PLT code stub.
10089 * lis 11,(plt+(i-1)*4)@ha
10090 * lwz 11,(plt+(i-1)*4)@l(11)
10091 * mtctr 11
10092 * bctr
10093 *
10094 * The branch table is the same, then comes
10095 *
10096 * PLTresolve:
10097 * lis 12,(got+4)@ha
10098 * addis 11,11,(-res_0)@ha
10099 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10100 * addi 11,11,(-res_0)@l # r11 = index * 4
10101 * mtctr 0
10102 * add 0,11,11
10103 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10104 * add 11,0,11 # r11 = index * 12 = reloc offset.
10105 * bctr
10106 */
10107 static const unsigned int plt_resolve[] =
10108 {
10109 LIS_12,
10110 ADDIS_11_11,
10111 LWZ_0_12,
10112 ADDI_11_11,
10113 MTCTR_0,
10114 ADD_0_11_11,
10115 LWZ_12_12,
10116 ADD_11_0_11,
10117 BCTR,
10118 NOP,
10119 NOP,
10120 NOP,
10121 NOP,
10122 NOP,
10123 NOP,
10124 NOP
10125 };
10126
10127 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10128 abort ();
10129 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10130 abort ();
10131
10132 /* Build the branch table, one for each plt entry (less one),
10133 and perhaps some padding. */
10134 p = htab->glink->contents;
10135 p += htab->glink_pltresolve;
10136 endp = htab->glink->contents;
10137 endp += htab->glink->size - GLINK_PLTRESOLVE;
10138 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10139 {
10140 bfd_put_32 (output_bfd, B + endp - p, p);
10141 p += 4;
10142 }
10143 while (p < endp)
10144 {
10145 bfd_put_32 (output_bfd, NOP, p);
10146 p += 4;
10147 }
10148
10149 res0 = (htab->glink_pltresolve
10150 + htab->glink->output_section->vma
10151 + htab->glink->output_offset);
10152
10153 if (htab->params->ppc476_workaround)
10154 {
10155 /* Ensure that a call stub at the end of a page doesn't
10156 result in prefetch over the end of the page into the
10157 glink branch table. */
10158 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10159 bfd_vma page_addr;
10160 bfd_vma glink_start = (htab->glink->output_section->vma
10161 + htab->glink->output_offset);
10162
10163 for (page_addr = res0 & -pagesize;
10164 page_addr > glink_start;
10165 page_addr -= pagesize)
10166 {
10167 /* We have a plt call stub that may need fixing. */
10168 bfd_byte *loc;
10169 unsigned int insn;
10170
10171 loc = htab->glink->contents + page_addr - 4 - glink_start;
10172 insn = bfd_get_32 (output_bfd, loc);
10173 if (insn == BCTR)
10174 {
10175 /* By alignment, we know that there must be at least
10176 one other call stub before this one. */
10177 insn = bfd_get_32 (output_bfd, loc - 16);
10178 if (insn == BCTR)
10179 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10180 else
10181 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10182 }
10183 }
10184 }
10185
10186 /* Last comes the PLTresolve stub. */
10187 if (info->shared)
10188 {
10189 bfd_vma bcl;
10190
10191 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10192 {
10193 unsigned int insn = pic_plt_resolve[i];
10194
10195 if (htab->params->ppc476_workaround && insn == NOP)
10196 insn = BA + 0;
10197 bfd_put_32 (output_bfd, insn, p);
10198 p += 4;
10199 }
10200 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10201
10202 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10203 + htab->glink->output_section->vma
10204 + htab->glink->output_offset);
10205
10206 bfd_put_32 (output_bfd,
10207 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10208 bfd_put_32 (output_bfd,
10209 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10210 bfd_put_32 (output_bfd,
10211 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10212 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10213 {
10214 bfd_put_32 (output_bfd,
10215 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10216 bfd_put_32 (output_bfd,
10217 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10218 }
10219 else
10220 {
10221 bfd_put_32 (output_bfd,
10222 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10223 bfd_put_32 (output_bfd,
10224 LWZ_12_12 + 4, p + 9*4);
10225 }
10226 }
10227 else
10228 {
10229 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10230 {
10231 unsigned int insn = plt_resolve[i];
10232
10233 if (htab->params->ppc476_workaround && insn == NOP)
10234 insn = BA + 0;
10235 bfd_put_32 (output_bfd, insn, p);
10236 p += 4;
10237 }
10238 p -= 4 * ARRAY_SIZE (plt_resolve);
10239
10240 bfd_put_32 (output_bfd,
10241 LIS_12 + PPC_HA (got + 4), p + 0*4);
10242 bfd_put_32 (output_bfd,
10243 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10244 bfd_put_32 (output_bfd,
10245 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10246 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10247 {
10248 bfd_put_32 (output_bfd,
10249 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10250 bfd_put_32 (output_bfd,
10251 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10252 }
10253 else
10254 {
10255 bfd_put_32 (output_bfd,
10256 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10257 bfd_put_32 (output_bfd,
10258 LWZ_12_12 + 4, p + 6*4);
10259 }
10260 }
10261 }
10262
10263 if (htab->glink_eh_frame != NULL
10264 && htab->glink_eh_frame->contents != NULL)
10265 {
10266 unsigned char *p = htab->glink_eh_frame->contents;
10267 bfd_vma val;
10268
10269 p += sizeof (glink_eh_frame_cie);
10270 /* FDE length. */
10271 p += 4;
10272 /* CIE pointer. */
10273 p += 4;
10274 /* Offset to .glink. */
10275 val = (htab->glink->output_section->vma
10276 + htab->glink->output_offset);
10277 val -= (htab->glink_eh_frame->output_section->vma
10278 + htab->glink_eh_frame->output_offset);
10279 val -= p - htab->glink_eh_frame->contents;
10280 bfd_put_32 (htab->elf.dynobj, val, p);
10281
10282 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10283 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10284 htab->glink_eh_frame,
10285 htab->glink_eh_frame->contents))
10286 return FALSE;
10287 }
10288
10289 return ret;
10290 }
10291 \f
10292 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10293 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10294 #define TARGET_BIG_SYM powerpc_elf32_vec
10295 #define TARGET_BIG_NAME "elf32-powerpc"
10296 #define ELF_ARCH bfd_arch_powerpc
10297 #define ELF_TARGET_ID PPC32_ELF_DATA
10298 #define ELF_MACHINE_CODE EM_PPC
10299 #ifdef __QNXTARGET__
10300 #define ELF_MAXPAGESIZE 0x1000
10301 #else
10302 #define ELF_MAXPAGESIZE 0x10000
10303 #endif
10304 #define ELF_MINPAGESIZE 0x1000
10305 #define ELF_COMMONPAGESIZE 0x1000
10306 #define elf_info_to_howto ppc_elf_info_to_howto
10307
10308 #ifdef EM_CYGNUS_POWERPC
10309 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10310 #endif
10311
10312 #ifdef EM_PPC_OLD
10313 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10314 #endif
10315
10316 #define elf_backend_plt_not_loaded 1
10317 #define elf_backend_can_gc_sections 1
10318 #define elf_backend_can_refcount 1
10319 #define elf_backend_rela_normal 1
10320 #define elf_backend_caches_rawsize 1
10321
10322 #define bfd_elf32_mkobject ppc_elf_mkobject
10323 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10324 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10325 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10326 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10327 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10328 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10329 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10330
10331 #define elf_backend_object_p ppc_elf_object_p
10332 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10333 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10334 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10335 #define elf_backend_relocate_section ppc_elf_relocate_section
10336 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10337 #define elf_backend_check_relocs ppc_elf_check_relocs
10338 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10339 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10340 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10341 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10342 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10343 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10344 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10345 #define elf_backend_fake_sections ppc_elf_fake_sections
10346 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10347 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10348 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10349 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10350 #define elf_backend_write_core_note ppc_elf_write_core_note
10351 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10352 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10353 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10354 #define elf_backend_write_section ppc_elf_write_section
10355 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10356 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10357 #define elf_backend_action_discarded ppc_elf_action_discarded
10358 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10359 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10360 #define elf_backend_section_processing ppc_elf_section_processing
10361
10362 #include "elf32-target.h"
10363
10364 /* FreeBSD Target */
10365
10366 #undef TARGET_LITTLE_SYM
10367 #undef TARGET_LITTLE_NAME
10368
10369 #undef TARGET_BIG_SYM
10370 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10371 #undef TARGET_BIG_NAME
10372 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10373
10374 #undef ELF_OSABI
10375 #define ELF_OSABI ELFOSABI_FREEBSD
10376
10377 #undef elf32_bed
10378 #define elf32_bed elf32_powerpc_fbsd_bed
10379
10380 #include "elf32-target.h"
10381
10382 /* VxWorks Target */
10383
10384 #undef TARGET_LITTLE_SYM
10385 #undef TARGET_LITTLE_NAME
10386
10387 #undef TARGET_BIG_SYM
10388 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10389 #undef TARGET_BIG_NAME
10390 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10391
10392 #undef ELF_OSABI
10393
10394 /* VxWorks uses the elf default section flags for .plt. */
10395 static const struct bfd_elf_special_section *
10396 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10397 {
10398 if (sec->name == NULL)
10399 return NULL;
10400
10401 if (strcmp (sec->name, ".plt") == 0)
10402 return _bfd_elf_get_sec_type_attr (abfd, sec);
10403
10404 return ppc_elf_get_sec_type_attr (abfd, sec);
10405 }
10406
10407 /* Like ppc_elf_link_hash_table_create, but overrides
10408 appropriately for VxWorks. */
10409 static struct bfd_link_hash_table *
10410 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10411 {
10412 struct bfd_link_hash_table *ret;
10413
10414 ret = ppc_elf_link_hash_table_create (abfd);
10415 if (ret)
10416 {
10417 struct ppc_elf_link_hash_table *htab
10418 = (struct ppc_elf_link_hash_table *)ret;
10419 htab->is_vxworks = 1;
10420 htab->plt_type = PLT_VXWORKS;
10421 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10422 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10423 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10424 }
10425 return ret;
10426 }
10427
10428 /* Tweak magic VxWorks symbols as they are loaded. */
10429 static bfd_boolean
10430 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10431 struct bfd_link_info *info,
10432 Elf_Internal_Sym *sym,
10433 const char **namep ATTRIBUTE_UNUSED,
10434 flagword *flagsp ATTRIBUTE_UNUSED,
10435 asection **secp,
10436 bfd_vma *valp)
10437 {
10438 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10439 valp))
10440 return FALSE;
10441
10442 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10443 }
10444
10445 static void
10446 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10447 {
10448 ppc_elf_final_write_processing(abfd, linker);
10449 elf_vxworks_final_write_processing(abfd, linker);
10450 }
10451
10452 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10453 define it. */
10454 #undef elf_backend_want_plt_sym
10455 #define elf_backend_want_plt_sym 1
10456 #undef elf_backend_want_got_plt
10457 #define elf_backend_want_got_plt 1
10458 #undef elf_backend_got_symbol_offset
10459 #define elf_backend_got_symbol_offset 0
10460 #undef elf_backend_plt_not_loaded
10461 #define elf_backend_plt_not_loaded 0
10462 #undef elf_backend_plt_readonly
10463 #define elf_backend_plt_readonly 1
10464 #undef elf_backend_got_header_size
10465 #define elf_backend_got_header_size 12
10466
10467 #undef bfd_elf32_get_synthetic_symtab
10468
10469 #undef bfd_elf32_bfd_link_hash_table_create
10470 #define bfd_elf32_bfd_link_hash_table_create \
10471 ppc_elf_vxworks_link_hash_table_create
10472 #undef elf_backend_add_symbol_hook
10473 #define elf_backend_add_symbol_hook \
10474 ppc_elf_vxworks_add_symbol_hook
10475 #undef elf_backend_link_output_symbol_hook
10476 #define elf_backend_link_output_symbol_hook \
10477 elf_vxworks_link_output_symbol_hook
10478 #undef elf_backend_final_write_processing
10479 #define elf_backend_final_write_processing \
10480 ppc_elf_vxworks_final_write_processing
10481 #undef elf_backend_get_sec_type_attr
10482 #define elf_backend_get_sec_type_attr \
10483 ppc_elf_vxworks_get_sec_type_attr
10484 #undef elf_backend_emit_relocs
10485 #define elf_backend_emit_relocs \
10486 elf_vxworks_emit_relocs
10487
10488 #undef elf32_bed
10489 #define elf32_bed ppc_elf_vxworks_bed
10490 #undef elf_backend_post_process_headers
10491
10492 #include "elf32-target.h"
GDB Binutils - Deliverables
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