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Fix memory access violations triggered by running objdump on fuzzed binaries.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2015 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 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 unsigned int r_type;
2023
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 r_type = ELF32_R_TYPE (dst->r_info);
2029 if (r_type >= R_PPC_max)
2030 {
2031 (*_bfd_error_handler) (_("%A: unrecognised PPC reloc number: %d"),
2032 abfd, r_type);
2033 bfd_set_error (bfd_error_bad_value);
2034 r_type = R_PPC_NONE;
2035 }
2036 cache_ptr->howto = ppc_elf_howto_table[r_type];
2037
2038 /* Just because the above assert didn't trigger doesn't mean that
2039 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2040 if (!cache_ptr->howto)
2041 {
2042 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2043 abfd, r_type);
2044 bfd_set_error (bfd_error_bad_value);
2045
2046 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2047 }
2048 }
2049
2050 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2051
2052 static bfd_reloc_status_type
2053 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2054 arelent *reloc_entry,
2055 asymbol *symbol,
2056 void *data ATTRIBUTE_UNUSED,
2057 asection *input_section,
2058 bfd *output_bfd,
2059 char **error_message ATTRIBUTE_UNUSED)
2060 {
2061 bfd_vma relocation;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2070 return bfd_reloc_outofrange;
2071
2072 if (bfd_is_com_section (symbol->section))
2073 relocation = 0;
2074 else
2075 relocation = symbol->value;
2076
2077 relocation += symbol->section->output_section->vma;
2078 relocation += symbol->section->output_offset;
2079 relocation += reloc_entry->addend;
2080 if (reloc_entry->howto->pc_relative)
2081 relocation -= reloc_entry->address;
2082
2083 reloc_entry->addend += (relocation & 0x8000) << 1;
2084
2085 return bfd_reloc_continue;
2086 }
2087
2088 static bfd_reloc_status_type
2089 ppc_elf_unhandled_reloc (bfd *abfd,
2090 arelent *reloc_entry,
2091 asymbol *symbol,
2092 void *data,
2093 asection *input_section,
2094 bfd *output_bfd,
2095 char **error_message)
2096 {
2097 /* If this is a relocatable link (output_bfd test tells us), just
2098 call the generic function. Any adjustment will be done at final
2099 link time. */
2100 if (output_bfd != NULL)
2101 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2102 input_section, output_bfd, error_message);
2103
2104 if (error_message != NULL)
2105 {
2106 static char buf[60];
2107 sprintf (buf, _("generic linker can't handle %s"),
2108 reloc_entry->howto->name);
2109 *error_message = buf;
2110 }
2111 return bfd_reloc_dangerous;
2112 }
2113 \f
2114 /* Sections created by the linker. */
2115
2116 typedef struct elf_linker_section
2117 {
2118 /* Pointer to the bfd section. */
2119 asection *section;
2120 /* Section name. */
2121 const char *name;
2122 /* Associated bss section name. */
2123 const char *bss_name;
2124 /* Associated symbol name. */
2125 const char *sym_name;
2126 /* Associated symbol. */
2127 struct elf_link_hash_entry *sym;
2128 } elf_linker_section_t;
2129
2130 /* Linked list of allocated pointer entries. This hangs off of the
2131 symbol lists, and provides allows us to return different pointers,
2132 based on different addend's. */
2133
2134 typedef struct elf_linker_section_pointers
2135 {
2136 /* next allocated pointer for this symbol */
2137 struct elf_linker_section_pointers *next;
2138 /* offset of pointer from beginning of section */
2139 bfd_vma offset;
2140 /* addend used */
2141 bfd_vma addend;
2142 /* which linker section this is */
2143 elf_linker_section_t *lsect;
2144 } elf_linker_section_pointers_t;
2145
2146 struct ppc_elf_obj_tdata
2147 {
2148 struct elf_obj_tdata elf;
2149
2150 /* A mapping from local symbols to offsets into the various linker
2151 sections added. This is index by the symbol index. */
2152 elf_linker_section_pointers_t **linker_section_pointers;
2153
2154 /* Flags used to auto-detect plt type. */
2155 unsigned int makes_plt_call : 1;
2156 unsigned int has_rel16 : 1;
2157 };
2158
2159 #define ppc_elf_tdata(bfd) \
2160 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2161
2162 #define elf_local_ptr_offsets(bfd) \
2163 (ppc_elf_tdata (bfd)->linker_section_pointers)
2164
2165 #define is_ppc_elf(bfd) \
2166 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2167 && elf_object_id (bfd) == PPC32_ELF_DATA)
2168
2169 /* Override the generic function because we store some extras. */
2170
2171 static bfd_boolean
2172 ppc_elf_mkobject (bfd *abfd)
2173 {
2174 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2175 PPC32_ELF_DATA);
2176 }
2177
2178 /* Fix bad default arch selected for a 32 bit input bfd when the
2179 default is 64 bit. */
2180
2181 static bfd_boolean
2182 ppc_elf_object_p (bfd *abfd)
2183 {
2184 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2185 {
2186 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2187
2188 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2189 {
2190 /* Relies on arch after 64 bit default being 32 bit default. */
2191 abfd->arch_info = abfd->arch_info->next;
2192 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2193 }
2194 }
2195 return TRUE;
2196 }
2197
2198 /* Function to set whether a module needs the -mrelocatable bit set. */
2199
2200 static bfd_boolean
2201 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2202 {
2203 BFD_ASSERT (!elf_flags_init (abfd)
2204 || elf_elfheader (abfd)->e_flags == flags);
2205
2206 elf_elfheader (abfd)->e_flags = flags;
2207 elf_flags_init (abfd) = TRUE;
2208 return TRUE;
2209 }
2210
2211 /* Support for core dump NOTE sections. */
2212
2213 static bfd_boolean
2214 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2215 {
2216 int offset;
2217 unsigned int size;
2218
2219 switch (note->descsz)
2220 {
2221 default:
2222 return FALSE;
2223
2224 case 268: /* Linux/PPC. */
2225 /* pr_cursig */
2226 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2227
2228 /* pr_pid */
2229 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2230
2231 /* pr_reg */
2232 offset = 72;
2233 size = 192;
2234
2235 break;
2236 }
2237
2238 /* Make a ".reg/999" section. */
2239 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2240 size, note->descpos + offset);
2241 }
2242
2243 static bfd_boolean
2244 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2245 {
2246 switch (note->descsz)
2247 {
2248 default:
2249 return FALSE;
2250
2251 case 128: /* Linux/PPC elf_prpsinfo. */
2252 elf_tdata (abfd)->core->pid
2253 = bfd_get_32 (abfd, note->descdata + 16);
2254 elf_tdata (abfd)->core->program
2255 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2256 elf_tdata (abfd)->core->command
2257 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2258 }
2259
2260 /* Note that for some reason, a spurious space is tacked
2261 onto the end of the args in some (at least one anyway)
2262 implementations, so strip it off if it exists. */
2263
2264 {
2265 char *command = elf_tdata (abfd)->core->command;
2266 int n = strlen (command);
2267
2268 if (0 < n && command[n - 1] == ' ')
2269 command[n - 1] = '\0';
2270 }
2271
2272 return TRUE;
2273 }
2274
2275 char *
2276 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2277 const struct elf_internal_linux_prpsinfo *prpsinfo)
2278 {
2279 struct elf_external_ppc_linux_prpsinfo32 data;
2280
2281 memset (&data, 0, sizeof (data));
2282 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2283
2284 return elfcore_write_note (abfd, buf, bufsiz,
2285 "CORE", NT_PRPSINFO, &data, sizeof (data));
2286 }
2287
2288 static char *
2289 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2290 {
2291 switch (note_type)
2292 {
2293 default:
2294 return NULL;
2295
2296 case NT_PRPSINFO:
2297 {
2298 char data[128];
2299 va_list ap;
2300
2301 va_start (ap, note_type);
2302 memset (data, 0, sizeof (data));
2303 strncpy (data + 32, va_arg (ap, const char *), 16);
2304 strncpy (data + 48, va_arg (ap, const char *), 80);
2305 va_end (ap);
2306 return elfcore_write_note (abfd, buf, bufsiz,
2307 "CORE", note_type, data, sizeof (data));
2308 }
2309
2310 case NT_PRSTATUS:
2311 {
2312 char data[268];
2313 va_list ap;
2314 long pid;
2315 int cursig;
2316 const void *greg;
2317
2318 va_start (ap, note_type);
2319 memset (data, 0, 72);
2320 pid = va_arg (ap, long);
2321 bfd_put_32 (abfd, pid, data + 24);
2322 cursig = va_arg (ap, int);
2323 bfd_put_16 (abfd, cursig, data + 12);
2324 greg = va_arg (ap, const void *);
2325 memcpy (data + 72, greg, 192);
2326 memset (data + 264, 0, 4);
2327 va_end (ap);
2328 return elfcore_write_note (abfd, buf, bufsiz,
2329 "CORE", note_type, data, sizeof (data));
2330 }
2331 }
2332 }
2333
2334 static flagword
2335 ppc_elf_lookup_section_flags (char *flag_name)
2336 {
2337
2338 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2339 return SHF_PPC_VLE;
2340
2341 return 0;
2342 }
2343
2344 /* Add the VLE flag if required. */
2345
2346 bfd_boolean
2347 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2348 {
2349 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2350 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2351 shdr->sh_flags |= SHF_PPC_VLE;
2352
2353 return TRUE;
2354 }
2355
2356 /* Return address for Ith PLT stub in section PLT, for relocation REL
2357 or (bfd_vma) -1 if it should not be included. */
2358
2359 static bfd_vma
2360 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2361 const asection *plt ATTRIBUTE_UNUSED,
2362 const arelent *rel)
2363 {
2364 return rel->address;
2365 }
2366
2367 /* Handle a PowerPC specific section when reading an object file. This
2368 is called when bfd_section_from_shdr finds a section with an unknown
2369 type. */
2370
2371 static bfd_boolean
2372 ppc_elf_section_from_shdr (bfd *abfd,
2373 Elf_Internal_Shdr *hdr,
2374 const char *name,
2375 int shindex)
2376 {
2377 asection *newsect;
2378 flagword flags;
2379
2380 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2381 return FALSE;
2382
2383 newsect = hdr->bfd_section;
2384 flags = bfd_get_section_flags (abfd, newsect);
2385 if (hdr->sh_flags & SHF_EXCLUDE)
2386 flags |= SEC_EXCLUDE;
2387
2388 if (hdr->sh_type == SHT_ORDERED)
2389 flags |= SEC_SORT_ENTRIES;
2390
2391 bfd_set_section_flags (abfd, newsect, flags);
2392 return TRUE;
2393 }
2394
2395 /* Set up any other section flags and such that may be necessary. */
2396
2397 static bfd_boolean
2398 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2399 Elf_Internal_Shdr *shdr,
2400 asection *asect)
2401 {
2402 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2403 shdr->sh_type = SHT_ORDERED;
2404
2405 return TRUE;
2406 }
2407
2408 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2409 need to bump up the number of section headers. */
2410
2411 static int
2412 ppc_elf_additional_program_headers (bfd *abfd,
2413 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2414 {
2415 asection *s;
2416 int ret = 0;
2417
2418 s = bfd_get_section_by_name (abfd, ".sbss2");
2419 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2420 ++ret;
2421
2422 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2423 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2424 ++ret;
2425
2426 return ret;
2427 }
2428
2429 /* Modify the segment map for VLE executables. */
2430
2431 bfd_boolean
2432 ppc_elf_modify_segment_map (bfd *abfd,
2433 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2434 {
2435 struct elf_segment_map *m, *n;
2436 bfd_size_type amt;
2437 unsigned int j, k;
2438 bfd_boolean sect0_vle, sectj_vle;
2439
2440 /* At this point in the link, output sections have already been sorted by
2441 LMA and assigned to segments. All that is left to do is to ensure
2442 there is no mixing of VLE & non-VLE sections in a text segment.
2443 If we find that case, we split the segment.
2444 We maintain the original output section order. */
2445
2446 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2447 {
2448 if (m->count == 0)
2449 continue;
2450
2451 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2452 for (j = 1; j < m->count; ++j)
2453 {
2454 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2455
2456 if (sectj_vle != sect0_vle)
2457 break;
2458 }
2459 if (j >= m->count)
2460 continue;
2461
2462 /* sections 0..j-1 stay in this (current) segment,
2463 the remainder are put in a new segment.
2464 The scan resumes with the new segment. */
2465
2466 /* Fix the new segment. */
2467 amt = sizeof (struct elf_segment_map);
2468 amt += (m->count - j - 1) * sizeof (asection *);
2469 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2470 if (n == NULL)
2471 return FALSE;
2472
2473 n->p_type = PT_LOAD;
2474 n->p_flags = PF_X | PF_R;
2475 if (sectj_vle)
2476 n->p_flags |= PF_PPC_VLE;
2477 n->count = m->count - j;
2478 for (k = 0; k < n->count; ++k)
2479 {
2480 n->sections[k] = m->sections[j+k];
2481 m->sections[j+k] = NULL;
2482 }
2483 n->next = m->next;
2484 m->next = n;
2485
2486 /* Fix the current segment */
2487 m->count = j;
2488 }
2489
2490 return TRUE;
2491 }
2492
2493 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2494 .PPC.EMB.sbss0 a normal section, and not a bss section so
2495 that the linker doesn't crater when trying to make more than
2496 2 sections. */
2497
2498 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2499 {
2500 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2501 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2502 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2503 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2504 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2505 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2506 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2507 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2508 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2509 { NULL, 0, 0, 0, 0 }
2510 };
2511
2512 /* This is what we want for new plt/got. */
2513 static struct bfd_elf_special_section ppc_alt_plt =
2514 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2515
2516 static const struct bfd_elf_special_section *
2517 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2518 {
2519 const struct bfd_elf_special_section *ssect;
2520
2521 /* See if this is one of the special sections. */
2522 if (sec->name == NULL)
2523 return NULL;
2524
2525 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2526 sec->use_rela_p);
2527 if (ssect != NULL)
2528 {
2529 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2530 ssect = &ppc_alt_plt;
2531 return ssect;
2532 }
2533
2534 return _bfd_elf_get_sec_type_attr (abfd, sec);
2535 }
2536 \f
2537 /* Very simple linked list structure for recording apuinfo values. */
2538 typedef struct apuinfo_list
2539 {
2540 struct apuinfo_list *next;
2541 unsigned long value;
2542 }
2543 apuinfo_list;
2544
2545 static apuinfo_list *head;
2546 static bfd_boolean apuinfo_set;
2547
2548 static void
2549 apuinfo_list_init (void)
2550 {
2551 head = NULL;
2552 apuinfo_set = FALSE;
2553 }
2554
2555 static void
2556 apuinfo_list_add (unsigned long value)
2557 {
2558 apuinfo_list *entry = head;
2559
2560 while (entry != NULL)
2561 {
2562 if (entry->value == value)
2563 return;
2564 entry = entry->next;
2565 }
2566
2567 entry = bfd_malloc (sizeof (* entry));
2568 if (entry == NULL)
2569 return;
2570
2571 entry->value = value;
2572 entry->next = head;
2573 head = entry;
2574 }
2575
2576 static unsigned
2577 apuinfo_list_length (void)
2578 {
2579 apuinfo_list *entry;
2580 unsigned long count;
2581
2582 for (entry = head, count = 0;
2583 entry;
2584 entry = entry->next)
2585 ++ count;
2586
2587 return count;
2588 }
2589
2590 static inline unsigned long
2591 apuinfo_list_element (unsigned long number)
2592 {
2593 apuinfo_list * entry;
2594
2595 for (entry = head;
2596 entry && number --;
2597 entry = entry->next)
2598 ;
2599
2600 return entry ? entry->value : 0;
2601 }
2602
2603 static void
2604 apuinfo_list_finish (void)
2605 {
2606 apuinfo_list *entry;
2607
2608 for (entry = head; entry;)
2609 {
2610 apuinfo_list *next = entry->next;
2611 free (entry);
2612 entry = next;
2613 }
2614
2615 head = NULL;
2616 }
2617
2618 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2619 #define APUINFO_LABEL "APUinfo"
2620
2621 /* Scan the input BFDs and create a linked list of
2622 the APUinfo values that will need to be emitted. */
2623
2624 static void
2625 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2626 {
2627 bfd *ibfd;
2628 asection *asec;
2629 char *buffer = NULL;
2630 bfd_size_type largest_input_size = 0;
2631 unsigned i;
2632 unsigned long length;
2633 const char *error_message = NULL;
2634
2635 if (link_info == NULL)
2636 return;
2637
2638 apuinfo_list_init ();
2639
2640 /* Read in the input sections contents. */
2641 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2642 {
2643 unsigned long datum;
2644
2645 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2646 if (asec == NULL)
2647 continue;
2648
2649 error_message = _("corrupt %s section in %B");
2650 length = asec->size;
2651 if (length < 20)
2652 goto fail;
2653
2654 apuinfo_set = TRUE;
2655 if (largest_input_size < asec->size)
2656 {
2657 if (buffer)
2658 free (buffer);
2659 largest_input_size = asec->size;
2660 buffer = bfd_malloc (largest_input_size);
2661 if (!buffer)
2662 return;
2663 }
2664
2665 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2666 || (bfd_bread (buffer, length, ibfd) != length))
2667 {
2668 error_message = _("unable to read in %s section from %B");
2669 goto fail;
2670 }
2671
2672 /* Verify the contents of the header. Note - we have to
2673 extract the values this way in order to allow for a
2674 host whose endian-ness is different from the target. */
2675 datum = bfd_get_32 (ibfd, buffer);
2676 if (datum != sizeof APUINFO_LABEL)
2677 goto fail;
2678
2679 datum = bfd_get_32 (ibfd, buffer + 8);
2680 if (datum != 0x2)
2681 goto fail;
2682
2683 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2684 goto fail;
2685
2686 /* Get the number of bytes used for apuinfo entries. */
2687 datum = bfd_get_32 (ibfd, buffer + 4);
2688 if (datum + 20 != length)
2689 goto fail;
2690
2691 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2692 for (i = 0; i < datum; i += 4)
2693 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2694 }
2695
2696 error_message = NULL;
2697
2698 if (apuinfo_set)
2699 {
2700 /* Compute the size of the output section. */
2701 unsigned num_entries = apuinfo_list_length ();
2702
2703 /* Set the output section size, if it exists. */
2704 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2705
2706 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2707 {
2708 ibfd = abfd;
2709 error_message = _("warning: unable to set size of %s section in %B");
2710 }
2711 }
2712
2713 fail:
2714 if (buffer)
2715 free (buffer);
2716
2717 if (error_message)
2718 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2719 }
2720
2721 /* Prevent the output section from accumulating the input sections'
2722 contents. We have already stored this in our linked list structure. */
2723
2724 static bfd_boolean
2725 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2726 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2727 asection *asec,
2728 bfd_byte *contents ATTRIBUTE_UNUSED)
2729 {
2730 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2731 }
2732
2733 /* Finally we can generate the output section. */
2734
2735 static void
2736 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2737 {
2738 bfd_byte *buffer;
2739 asection *asec;
2740 unsigned i;
2741 unsigned num_entries;
2742 bfd_size_type length;
2743
2744 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2745 if (asec == NULL)
2746 return;
2747
2748 if (!apuinfo_set)
2749 return;
2750
2751 length = asec->size;
2752 if (length < 20)
2753 return;
2754
2755 buffer = bfd_malloc (length);
2756 if (buffer == NULL)
2757 {
2758 (*_bfd_error_handler)
2759 (_("failed to allocate space for new APUinfo section."));
2760 return;
2761 }
2762
2763 /* Create the apuinfo header. */
2764 num_entries = apuinfo_list_length ();
2765 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2766 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2767 bfd_put_32 (abfd, 0x2, buffer + 8);
2768 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2769
2770 length = 20;
2771 for (i = 0; i < num_entries; i++)
2772 {
2773 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2774 length += 4;
2775 }
2776
2777 if (length != asec->size)
2778 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2779
2780 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2781 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2782
2783 free (buffer);
2784
2785 apuinfo_list_finish ();
2786 }
2787 \f
2788 static bfd_boolean
2789 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2790 {
2791 bfd_byte buf[GLINK_ENTRY_SIZE];
2792
2793 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2794 return FALSE;
2795
2796 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2797 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2798 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2799 && bfd_get_32 (abfd, buf + 12) == BCTR);
2800 }
2801
2802 static bfd_boolean
2803 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2804 {
2805 bfd_vma vma = *(bfd_vma *) ptr;
2806 return ((section->flags & SEC_ALLOC) != 0
2807 && section->vma <= vma
2808 && vma < section->vma + section->size);
2809 }
2810
2811 static long
2812 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2813 long dynsymcount, asymbol **dynsyms,
2814 asymbol **ret)
2815 {
2816 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2817 asection *plt, *relplt, *dynamic, *glink;
2818 bfd_vma glink_vma = 0;
2819 bfd_vma resolv_vma = 0;
2820 bfd_vma stub_vma;
2821 asymbol *s;
2822 arelent *p;
2823 long count, i;
2824 size_t size;
2825 char *names;
2826 bfd_byte buf[4];
2827
2828 *ret = NULL;
2829
2830 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2831 return 0;
2832
2833 if (dynsymcount <= 0)
2834 return 0;
2835
2836 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2837 if (relplt == NULL)
2838 return 0;
2839
2840 plt = bfd_get_section_by_name (abfd, ".plt");
2841 if (plt == NULL)
2842 return 0;
2843
2844 /* Call common code to handle old-style executable PLTs. */
2845 if (elf_section_flags (plt) & SHF_EXECINSTR)
2846 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2847 dynsymcount, dynsyms, ret);
2848
2849 /* If this object was prelinked, the prelinker stored the address
2850 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2851 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2852 if (dynamic != NULL)
2853 {
2854 bfd_byte *dynbuf, *extdyn, *extdynend;
2855 size_t extdynsize;
2856 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2857
2858 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2859 return -1;
2860
2861 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2862 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2863
2864 extdyn = dynbuf;
2865 extdynend = extdyn + dynamic->size;
2866 for (; extdyn < extdynend; extdyn += extdynsize)
2867 {
2868 Elf_Internal_Dyn dyn;
2869 (*swap_dyn_in) (abfd, extdyn, &dyn);
2870
2871 if (dyn.d_tag == DT_NULL)
2872 break;
2873
2874 if (dyn.d_tag == DT_PPC_GOT)
2875 {
2876 unsigned int g_o_t = dyn.d_un.d_val;
2877 asection *got = bfd_get_section_by_name (abfd, ".got");
2878 if (got != NULL
2879 && bfd_get_section_contents (abfd, got, buf,
2880 g_o_t - got->vma + 4, 4))
2881 glink_vma = bfd_get_32 (abfd, buf);
2882 break;
2883 }
2884 }
2885 free (dynbuf);
2886 }
2887
2888 /* Otherwise we read the first plt entry. */
2889 if (glink_vma == 0)
2890 {
2891 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2892 glink_vma = bfd_get_32 (abfd, buf);
2893 }
2894
2895 if (glink_vma == 0)
2896 return 0;
2897
2898 /* The .glink section usually does not survive the final
2899 link; search for the section (usually .text) where the
2900 glink stubs now reside. */
2901 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2902 if (glink == NULL)
2903 return 0;
2904
2905 /* Determine glink PLT resolver by reading the relative branch
2906 from the first glink stub. */
2907 if (bfd_get_section_contents (abfd, glink, buf,
2908 glink_vma - glink->vma, 4))
2909 {
2910 unsigned int insn = bfd_get_32 (abfd, buf);
2911
2912 /* The first glink stub may either branch to the resolver ... */
2913 insn ^= B;
2914 if ((insn & ~0x3fffffc) == 0)
2915 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2916
2917 /* ... or fall through a bunch of NOPs. */
2918 else if ((insn ^ B ^ NOP) == 0)
2919 for (i = 4;
2920 bfd_get_section_contents (abfd, glink, buf,
2921 glink_vma - glink->vma + i, 4);
2922 i += 4)
2923 if (bfd_get_32 (abfd, buf) != NOP)
2924 {
2925 resolv_vma = glink_vma + i;
2926 break;
2927 }
2928 }
2929
2930 count = relplt->size / sizeof (Elf32_External_Rela);
2931 stub_vma = glink_vma - (bfd_vma) count * 16;
2932 /* If the stubs are those for -shared/-pie then we might have
2933 multiple stubs for each plt entry. If that is the case then
2934 there is no way to associate stubs with their plt entries short
2935 of figuring out the GOT pointer value used in the stub. */
2936 if (!is_nonpic_glink_stub (abfd, glink,
2937 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2938 return 0;
2939
2940 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2941 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2942 return -1;
2943
2944 size = count * sizeof (asymbol);
2945 p = relplt->relocation;
2946 for (i = 0; i < count; i++, p++)
2947 {
2948 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2949 if (p->addend != 0)
2950 size += sizeof ("+0x") - 1 + 8;
2951 }
2952
2953 size += sizeof (asymbol) + sizeof ("__glink");
2954
2955 if (resolv_vma)
2956 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2957
2958 s = *ret = bfd_malloc (size);
2959 if (s == NULL)
2960 return -1;
2961
2962 names = (char *) (s + count + 1 + (resolv_vma != 0));
2963 p = relplt->relocation;
2964 for (i = 0; i < count; i++, p++)
2965 {
2966 size_t len;
2967
2968 *s = **p->sym_ptr_ptr;
2969 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2970 we are defining a symbol, ensure one of them is set. */
2971 if ((s->flags & BSF_LOCAL) == 0)
2972 s->flags |= BSF_GLOBAL;
2973 s->flags |= BSF_SYNTHETIC;
2974 s->section = glink;
2975 s->value = stub_vma - glink->vma;
2976 s->name = names;
2977 s->udata.p = NULL;
2978 len = strlen ((*p->sym_ptr_ptr)->name);
2979 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2980 names += len;
2981 if (p->addend != 0)
2982 {
2983 memcpy (names, "+0x", sizeof ("+0x") - 1);
2984 names += sizeof ("+0x") - 1;
2985 bfd_sprintf_vma (abfd, names, p->addend);
2986 names += strlen (names);
2987 }
2988 memcpy (names, "@plt", sizeof ("@plt"));
2989 names += sizeof ("@plt");
2990 ++s;
2991 stub_vma += 16;
2992 }
2993
2994 /* Add a symbol at the start of the glink branch table. */
2995 memset (s, 0, sizeof *s);
2996 s->the_bfd = abfd;
2997 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2998 s->section = glink;
2999 s->value = glink_vma - glink->vma;
3000 s->name = names;
3001 memcpy (names, "__glink", sizeof ("__glink"));
3002 names += sizeof ("__glink");
3003 s++;
3004 count++;
3005
3006 if (resolv_vma)
3007 {
3008 /* Add a symbol for the glink PLT resolver. */
3009 memset (s, 0, sizeof *s);
3010 s->the_bfd = abfd;
3011 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3012 s->section = glink;
3013 s->value = resolv_vma - glink->vma;
3014 s->name = names;
3015 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3016 names += sizeof ("__glink_PLTresolve");
3017 s++;
3018 count++;
3019 }
3020
3021 return count;
3022 }
3023 \f
3024 /* The following functions are specific to the ELF linker, while
3025 functions above are used generally. They appear in this file more
3026 or less in the order in which they are called. eg.
3027 ppc_elf_check_relocs is called early in the link process,
3028 ppc_elf_finish_dynamic_sections is one of the last functions
3029 called. */
3030
3031 /* Track PLT entries needed for a given symbol. We might need more
3032 than one glink entry per symbol when generating a pic binary. */
3033 struct plt_entry
3034 {
3035 struct plt_entry *next;
3036
3037 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3038 This field stores the offset into .got2 used to initialise the
3039 GOT pointer reg. It will always be at least 32768. (Current
3040 gcc always uses an offset of 32768, but ld -r will pack .got2
3041 sections together resulting in larger offsets). */
3042 bfd_vma addend;
3043
3044 /* The .got2 section. */
3045 asection *sec;
3046
3047 /* PLT refcount or offset. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } plt;
3053
3054 /* .glink stub offset. */
3055 bfd_vma glink_offset;
3056 };
3057
3058 /* Of those relocs that might be copied as dynamic relocs, this function
3059 selects those that must be copied when linking a shared library,
3060 even when the symbol is local. */
3061
3062 static int
3063 must_be_dyn_reloc (struct bfd_link_info *info,
3064 enum elf_ppc_reloc_type r_type)
3065 {
3066 switch (r_type)
3067 {
3068 default:
3069 return 1;
3070
3071 case R_PPC_REL24:
3072 case R_PPC_REL14:
3073 case R_PPC_REL14_BRTAKEN:
3074 case R_PPC_REL14_BRNTAKEN:
3075 case R_PPC_REL32:
3076 return 0;
3077
3078 case R_PPC_TPREL32:
3079 case R_PPC_TPREL16:
3080 case R_PPC_TPREL16_LO:
3081 case R_PPC_TPREL16_HI:
3082 case R_PPC_TPREL16_HA:
3083 return !info->executable;
3084 }
3085 }
3086
3087 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3088 copying dynamic variables from a shared lib into an app's dynbss
3089 section, and instead use a dynamic relocation to point into the
3090 shared lib. */
3091 #define ELIMINATE_COPY_RELOCS 1
3092
3093 /* Used to track dynamic relocations for local symbols. */
3094 struct ppc_dyn_relocs
3095 {
3096 struct ppc_dyn_relocs *next;
3097
3098 /* The input section of the reloc. */
3099 asection *sec;
3100
3101 /* Total number of relocs copied for the input section. */
3102 unsigned int count : 31;
3103
3104 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3105 unsigned int ifunc : 1;
3106 };
3107
3108 /* PPC ELF linker hash entry. */
3109
3110 struct ppc_elf_link_hash_entry
3111 {
3112 struct elf_link_hash_entry elf;
3113
3114 /* If this symbol is used in the linker created sections, the processor
3115 specific backend uses this field to map the field into the offset
3116 from the beginning of the section. */
3117 elf_linker_section_pointers_t *linker_section_pointer;
3118
3119 /* Track dynamic relocs copied for this symbol. */
3120 struct elf_dyn_relocs *dyn_relocs;
3121
3122 /* Contexts in which symbol is used in the GOT (or TOC).
3123 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3124 corresponding relocs are encountered during check_relocs.
3125 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3126 indicate the corresponding GOT entry type is not needed. */
3127 #define TLS_GD 1 /* GD reloc. */
3128 #define TLS_LD 2 /* LD reloc. */
3129 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3130 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3131 #define TLS_TLS 16 /* Any TLS reloc. */
3132 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3133 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3134 char tls_mask;
3135
3136 /* Nonzero if we have seen a small data relocation referring to this
3137 symbol. */
3138 unsigned char has_sda_refs;
3139 };
3140
3141 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3142
3143 /* PPC ELF linker hash table. */
3144
3145 struct ppc_elf_link_hash_table
3146 {
3147 struct elf_link_hash_table elf;
3148
3149 /* Various options passed from the linker. */
3150 struct ppc_elf_params *params;
3151
3152 /* Short-cuts to get to dynamic linker sections. */
3153 asection *got;
3154 asection *relgot;
3155 asection *glink;
3156 asection *plt;
3157 asection *relplt;
3158 asection *iplt;
3159 asection *reliplt;
3160 asection *dynbss;
3161 asection *relbss;
3162 asection *dynsbss;
3163 asection *relsbss;
3164 elf_linker_section_t sdata[2];
3165 asection *sbss;
3166 asection *glink_eh_frame;
3167
3168 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3169 asection *srelplt2;
3170
3171 /* The .got.plt section (VxWorks only)*/
3172 asection *sgotplt;
3173
3174 /* Shortcut to __tls_get_addr. */
3175 struct elf_link_hash_entry *tls_get_addr;
3176
3177 /* The bfd that forced an old-style PLT. */
3178 bfd *old_bfd;
3179
3180 /* TLS local dynamic got entry handling. */
3181 union {
3182 bfd_signed_vma refcount;
3183 bfd_vma offset;
3184 } tlsld_got;
3185
3186 /* Offset of branch table to PltResolve function in glink. */
3187 bfd_vma glink_pltresolve;
3188
3189 /* Size of reserved GOT entries. */
3190 unsigned int got_header_size;
3191 /* Non-zero if allocating the header left a gap. */
3192 unsigned int got_gap;
3193
3194 /* The type of PLT we have chosen to use. */
3195 enum ppc_elf_plt_type plt_type;
3196
3197 /* True if the target system is VxWorks. */
3198 unsigned int is_vxworks:1;
3199
3200 /* The size of PLT entries. */
3201 int plt_entry_size;
3202 /* The distance between adjacent PLT slots. */
3203 int plt_slot_size;
3204 /* The size of the first PLT entry. */
3205 int plt_initial_entry_size;
3206
3207 /* Small local sym cache. */
3208 struct sym_cache sym_cache;
3209 };
3210
3211 /* Rename some of the generic section flags to better document how they
3212 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3213
3214 /* Nonzero if this section has TLS related relocations. */
3215 #define has_tls_reloc sec_flg0
3216
3217 /* Nonzero if this section has a call to __tls_get_addr. */
3218 #define has_tls_get_addr_call sec_flg1
3219
3220 /* Get the PPC ELF linker hash table from a link_info structure. */
3221
3222 #define ppc_elf_hash_table(p) \
3223 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3224 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3225
3226 /* Create an entry in a PPC ELF linker hash table. */
3227
3228 static struct bfd_hash_entry *
3229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3230 struct bfd_hash_table *table,
3231 const char *string)
3232 {
3233 /* Allocate the structure if it has not already been allocated by a
3234 subclass. */
3235 if (entry == NULL)
3236 {
3237 entry = bfd_hash_allocate (table,
3238 sizeof (struct ppc_elf_link_hash_entry));
3239 if (entry == NULL)
3240 return entry;
3241 }
3242
3243 /* Call the allocation method of the superclass. */
3244 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3245 if (entry != NULL)
3246 {
3247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3249 ppc_elf_hash_entry (entry)->tls_mask = 0;
3250 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3251 }
3252
3253 return entry;
3254 }
3255
3256 /* Create a PPC ELF linker hash table. */
3257
3258 static struct bfd_link_hash_table *
3259 ppc_elf_link_hash_table_create (bfd *abfd)
3260 {
3261 struct ppc_elf_link_hash_table *ret;
3262 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3263
3264 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3265 if (ret == NULL)
3266 return NULL;
3267
3268 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3269 ppc_elf_link_hash_newfunc,
3270 sizeof (struct ppc_elf_link_hash_entry),
3271 PPC32_ELF_DATA))
3272 {
3273 free (ret);
3274 return NULL;
3275 }
3276
3277 ret->elf.init_plt_refcount.refcount = 0;
3278 ret->elf.init_plt_refcount.glist = NULL;
3279 ret->elf.init_plt_offset.offset = 0;
3280 ret->elf.init_plt_offset.glist = NULL;
3281
3282 ret->params = &default_params;
3283
3284 ret->sdata[0].name = ".sdata";
3285 ret->sdata[0].sym_name = "_SDA_BASE_";
3286 ret->sdata[0].bss_name = ".sbss";
3287
3288 ret->sdata[1].name = ".sdata2";
3289 ret->sdata[1].sym_name = "_SDA2_BASE_";
3290 ret->sdata[1].bss_name = ".sbss2";
3291
3292 ret->plt_entry_size = 12;
3293 ret->plt_slot_size = 8;
3294 ret->plt_initial_entry_size = 72;
3295
3296 return &ret->elf.root;
3297 }
3298
3299 /* Hook linker params into hash table. */
3300
3301 void
3302 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3303 {
3304 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3305
3306 if (htab)
3307 htab->params = params;
3308 }
3309
3310 /* Create .got and the related sections. */
3311
3312 static bfd_boolean
3313 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3314 {
3315 struct ppc_elf_link_hash_table *htab;
3316 asection *s;
3317 flagword flags;
3318
3319 if (!_bfd_elf_create_got_section (abfd, info))
3320 return FALSE;
3321
3322 htab = ppc_elf_hash_table (info);
3323 htab->got = s = bfd_get_linker_section (abfd, ".got");
3324 if (s == NULL)
3325 abort ();
3326
3327 if (htab->is_vxworks)
3328 {
3329 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3330 if (!htab->sgotplt)
3331 abort ();
3332 }
3333 else
3334 {
3335 /* The powerpc .got has a blrl instruction in it. Mark it
3336 executable. */
3337 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3338 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3339 if (!bfd_set_section_flags (abfd, s, flags))
3340 return FALSE;
3341 }
3342
3343 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3344 if (!htab->relgot)
3345 abort ();
3346
3347 return TRUE;
3348 }
3349
3350 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3351 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3352 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3353
3354 static bfd_boolean
3355 ppc_elf_create_linker_section (bfd *abfd,
3356 struct bfd_link_info *info,
3357 flagword flags,
3358 elf_linker_section_t *lsect)
3359 {
3360 asection *s;
3361
3362 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3363 | SEC_LINKER_CREATED);
3364
3365 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3366 if (s == NULL)
3367 return FALSE;
3368 lsect->section = s;
3369
3370 /* Define the sym on the first section of this name. */
3371 s = bfd_get_section_by_name (abfd, lsect->name);
3372
3373 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3374 if (lsect->sym == NULL)
3375 return FALSE;
3376 lsect->sym->root.u.def.value = 0x8000;
3377 return TRUE;
3378 }
3379
3380 static bfd_boolean
3381 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3382 {
3383 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3384 asection *s;
3385 flagword flags;
3386
3387 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3388 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3389 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3390 htab->glink = s;
3391 if (s == NULL
3392 || !bfd_set_section_alignment (abfd, s,
3393 htab->params->ppc476_workaround ? 6 : 4))
3394 return FALSE;
3395
3396 if (!info->no_ld_generated_unwind_info)
3397 {
3398 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3399 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3400 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3401 htab->glink_eh_frame = s;
3402 if (s == NULL
3403 || !bfd_set_section_alignment (abfd, s, 2))
3404 return FALSE;
3405 }
3406
3407 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3408 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3409 htab->iplt = s;
3410 if (s == NULL
3411 || !bfd_set_section_alignment (abfd, s, 4))
3412 return FALSE;
3413
3414 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3415 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3416 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3417 htab->reliplt = s;
3418 if (s == NULL
3419 || ! bfd_set_section_alignment (abfd, s, 2))
3420 return FALSE;
3421
3422 if (!ppc_elf_create_linker_section (abfd, info, 0,
3423 &htab->sdata[0]))
3424 return FALSE;
3425
3426 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3427 &htab->sdata[1]))
3428 return FALSE;
3429
3430 return TRUE;
3431 }
3432
3433 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3434 to output sections (just like _bfd_elf_create_dynamic_sections has
3435 to create .dynbss and .rela.bss). */
3436
3437 static bfd_boolean
3438 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3439 {
3440 struct ppc_elf_link_hash_table *htab;
3441 asection *s;
3442 flagword flags;
3443
3444 htab = ppc_elf_hash_table (info);
3445
3446 if (htab->got == NULL
3447 && !ppc_elf_create_got (abfd, info))
3448 return FALSE;
3449
3450 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3451 return FALSE;
3452
3453 if (htab->glink == NULL
3454 && !ppc_elf_create_glink (abfd, info))
3455 return FALSE;
3456
3457 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3458 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3459 SEC_ALLOC | SEC_LINKER_CREATED);
3460 htab->dynsbss = s;
3461 if (s == NULL)
3462 return FALSE;
3463
3464 if (! info->shared)
3465 {
3466 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3467 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3468 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3469 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3470 htab->relsbss = s;
3471 if (s == NULL
3472 || ! bfd_set_section_alignment (abfd, s, 2))
3473 return FALSE;
3474 }
3475
3476 if (htab->is_vxworks
3477 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3478 return FALSE;
3479
3480 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3481 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3482 if (s == NULL)
3483 abort ();
3484
3485 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3486 if (htab->plt_type == PLT_VXWORKS)
3487 /* The VxWorks PLT is a loaded section with contents. */
3488 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3489 return bfd_set_section_flags (abfd, s, flags);
3490 }
3491
3492 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3493
3494 static void
3495 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3496 struct elf_link_hash_entry *dir,
3497 struct elf_link_hash_entry *ind)
3498 {
3499 struct ppc_elf_link_hash_entry *edir, *eind;
3500
3501 edir = (struct ppc_elf_link_hash_entry *) dir;
3502 eind = (struct ppc_elf_link_hash_entry *) ind;
3503
3504 edir->tls_mask |= eind->tls_mask;
3505 edir->has_sda_refs |= eind->has_sda_refs;
3506
3507 /* If called to transfer flags for a weakdef during processing
3508 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3509 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3510 if (!(ELIMINATE_COPY_RELOCS
3511 && eind->elf.root.type != bfd_link_hash_indirect
3512 && edir->elf.dynamic_adjusted))
3513 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3514
3515 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3516 edir->elf.ref_regular |= eind->elf.ref_regular;
3517 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3518 edir->elf.needs_plt |= eind->elf.needs_plt;
3519 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3520
3521 if (eind->dyn_relocs != NULL)
3522 {
3523 if (edir->dyn_relocs != NULL)
3524 {
3525 struct elf_dyn_relocs **pp;
3526 struct elf_dyn_relocs *p;
3527
3528 /* Add reloc counts against the indirect sym to the direct sym
3529 list. Merge any entries against the same section. */
3530 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3531 {
3532 struct elf_dyn_relocs *q;
3533
3534 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3535 if (q->sec == p->sec)
3536 {
3537 q->pc_count += p->pc_count;
3538 q->count += p->count;
3539 *pp = p->next;
3540 break;
3541 }
3542 if (q == NULL)
3543 pp = &p->next;
3544 }
3545 *pp = edir->dyn_relocs;
3546 }
3547
3548 edir->dyn_relocs = eind->dyn_relocs;
3549 eind->dyn_relocs = NULL;
3550 }
3551
3552 /* If we were called to copy over info for a weak sym, that's all.
3553 You might think dyn_relocs need not be copied over; After all,
3554 both syms will be dynamic or both non-dynamic so we're just
3555 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3556 code in ppc_elf_adjust_dynamic_symbol needs to check for
3557 dyn_relocs in read-only sections, and it does so on what is the
3558 DIR sym here. */
3559 if (eind->elf.root.type != bfd_link_hash_indirect)
3560 return;
3561
3562 /* Copy over the GOT refcount entries that we may have already seen to
3563 the symbol which just became indirect. */
3564 edir->elf.got.refcount += eind->elf.got.refcount;
3565 eind->elf.got.refcount = 0;
3566
3567 /* And plt entries. */
3568 if (eind->elf.plt.plist != NULL)
3569 {
3570 if (edir->elf.plt.plist != NULL)
3571 {
3572 struct plt_entry **entp;
3573 struct plt_entry *ent;
3574
3575 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3576 {
3577 struct plt_entry *dent;
3578
3579 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3580 if (dent->sec == ent->sec && dent->addend == ent->addend)
3581 {
3582 dent->plt.refcount += ent->plt.refcount;
3583 *entp = ent->next;
3584 break;
3585 }
3586 if (dent == NULL)
3587 entp = &ent->next;
3588 }
3589 *entp = edir->elf.plt.plist;
3590 }
3591
3592 edir->elf.plt.plist = eind->elf.plt.plist;
3593 eind->elf.plt.plist = NULL;
3594 }
3595
3596 if (eind->elf.dynindx != -1)
3597 {
3598 if (edir->elf.dynindx != -1)
3599 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3600 edir->elf.dynstr_index);
3601 edir->elf.dynindx = eind->elf.dynindx;
3602 edir->elf.dynstr_index = eind->elf.dynstr_index;
3603 eind->elf.dynindx = -1;
3604 eind->elf.dynstr_index = 0;
3605 }
3606 }
3607
3608 /* Hook called by the linker routine which adds symbols from an object
3609 file. We use it to put .comm items in .sbss, and not .bss. */
3610
3611 static bfd_boolean
3612 ppc_elf_add_symbol_hook (bfd *abfd,
3613 struct bfd_link_info *info,
3614 Elf_Internal_Sym *sym,
3615 const char **namep ATTRIBUTE_UNUSED,
3616 flagword *flagsp ATTRIBUTE_UNUSED,
3617 asection **secp,
3618 bfd_vma *valp)
3619 {
3620 if (sym->st_shndx == SHN_COMMON
3621 && !info->relocatable
3622 && is_ppc_elf (info->output_bfd)
3623 && sym->st_size <= elf_gp_size (abfd))
3624 {
3625 /* Common symbols less than or equal to -G nn bytes are automatically
3626 put into .sbss. */
3627 struct ppc_elf_link_hash_table *htab;
3628
3629 htab = ppc_elf_hash_table (info);
3630 if (htab->sbss == NULL)
3631 {
3632 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3633
3634 if (!htab->elf.dynobj)
3635 htab->elf.dynobj = abfd;
3636
3637 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3638 ".sbss",
3639 flags);
3640 if (htab->sbss == NULL)
3641 return FALSE;
3642 }
3643
3644 *secp = htab->sbss;
3645 *valp = sym->st_size;
3646 }
3647
3648 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3649 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
3650 && (abfd->flags & DYNAMIC) == 0
3651 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3652 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3653
3654 return TRUE;
3655 }
3656 \f
3657 /* Find a linker generated pointer with a given addend and type. */
3658
3659 static elf_linker_section_pointers_t *
3660 elf_find_pointer_linker_section
3661 (elf_linker_section_pointers_t *linker_pointers,
3662 bfd_vma addend,
3663 elf_linker_section_t *lsect)
3664 {
3665 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3666 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3667 return linker_pointers;
3668
3669 return NULL;
3670 }
3671
3672 /* Allocate a pointer to live in a linker created section. */
3673
3674 static bfd_boolean
3675 elf_allocate_pointer_linker_section (bfd *abfd,
3676 elf_linker_section_t *lsect,
3677 struct elf_link_hash_entry *h,
3678 const Elf_Internal_Rela *rel)
3679 {
3680 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3681 elf_linker_section_pointers_t *linker_section_ptr;
3682 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3683 bfd_size_type amt;
3684
3685 BFD_ASSERT (lsect != NULL);
3686
3687 /* Is this a global symbol? */
3688 if (h != NULL)
3689 {
3690 struct ppc_elf_link_hash_entry *eh;
3691
3692 /* Has this symbol already been allocated? If so, our work is done. */
3693 eh = (struct ppc_elf_link_hash_entry *) h;
3694 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3695 rel->r_addend,
3696 lsect))
3697 return TRUE;
3698
3699 ptr_linker_section_ptr = &eh->linker_section_pointer;
3700 }
3701 else
3702 {
3703 BFD_ASSERT (is_ppc_elf (abfd));
3704
3705 /* Allocation of a pointer to a local symbol. */
3706 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3707
3708 /* Allocate a table to hold the local symbols if first time. */
3709 if (!ptr)
3710 {
3711 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3712
3713 amt = num_symbols;
3714 amt *= sizeof (elf_linker_section_pointers_t *);
3715 ptr = bfd_zalloc (abfd, amt);
3716
3717 if (!ptr)
3718 return FALSE;
3719
3720 elf_local_ptr_offsets (abfd) = ptr;
3721 }
3722
3723 /* Has this symbol already been allocated? If so, our work is done. */
3724 if (elf_find_pointer_linker_section (ptr[r_symndx],
3725 rel->r_addend,
3726 lsect))
3727 return TRUE;
3728
3729 ptr_linker_section_ptr = &ptr[r_symndx];
3730 }
3731
3732 /* Allocate space for a pointer in the linker section, and allocate
3733 a new pointer record from internal memory. */
3734 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3735 amt = sizeof (elf_linker_section_pointers_t);
3736 linker_section_ptr = bfd_alloc (abfd, amt);
3737
3738 if (!linker_section_ptr)
3739 return FALSE;
3740
3741 linker_section_ptr->next = *ptr_linker_section_ptr;
3742 linker_section_ptr->addend = rel->r_addend;
3743 linker_section_ptr->lsect = lsect;
3744 *ptr_linker_section_ptr = linker_section_ptr;
3745
3746 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3747 return FALSE;
3748 linker_section_ptr->offset = lsect->section->size;
3749 lsect->section->size += 4;
3750
3751 #ifdef DEBUG
3752 fprintf (stderr,
3753 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3754 lsect->name, (long) linker_section_ptr->offset,
3755 (long) lsect->section->size);
3756 #endif
3757
3758 return TRUE;
3759 }
3760
3761 static struct plt_entry **
3762 update_local_sym_info (bfd *abfd,
3763 Elf_Internal_Shdr *symtab_hdr,
3764 unsigned long r_symndx,
3765 int tls_type)
3766 {
3767 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3768 struct plt_entry **local_plt;
3769 char *local_got_tls_masks;
3770
3771 if (local_got_refcounts == NULL)
3772 {
3773 bfd_size_type size = symtab_hdr->sh_info;
3774
3775 size *= (sizeof (*local_got_refcounts)
3776 + sizeof (*local_plt)
3777 + sizeof (*local_got_tls_masks));
3778 local_got_refcounts = bfd_zalloc (abfd, size);
3779 if (local_got_refcounts == NULL)
3780 return NULL;
3781 elf_local_got_refcounts (abfd) = local_got_refcounts;
3782 }
3783
3784 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3785 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3786 local_got_tls_masks[r_symndx] |= tls_type;
3787 if (tls_type != PLT_IFUNC)
3788 local_got_refcounts[r_symndx] += 1;
3789 return local_plt + r_symndx;
3790 }
3791
3792 static bfd_boolean
3793 update_plt_info (bfd *abfd, struct plt_entry **plist,
3794 asection *sec, bfd_vma addend)
3795 {
3796 struct plt_entry *ent;
3797
3798 if (addend < 32768)
3799 sec = NULL;
3800 for (ent = *plist; ent != NULL; ent = ent->next)
3801 if (ent->sec == sec && ent->addend == addend)
3802 break;
3803 if (ent == NULL)
3804 {
3805 bfd_size_type amt = sizeof (*ent);
3806 ent = bfd_alloc (abfd, amt);
3807 if (ent == NULL)
3808 return FALSE;
3809 ent->next = *plist;
3810 ent->sec = sec;
3811 ent->addend = addend;
3812 ent->plt.refcount = 0;
3813 *plist = ent;
3814 }
3815 ent->plt.refcount += 1;
3816 return TRUE;
3817 }
3818
3819 static struct plt_entry *
3820 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3821 {
3822 struct plt_entry *ent;
3823
3824 if (addend < 32768)
3825 sec = NULL;
3826 for (ent = *plist; ent != NULL; ent = ent->next)
3827 if (ent->sec == sec && ent->addend == addend)
3828 break;
3829 return ent;
3830 }
3831
3832 static bfd_boolean
3833 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3834 {
3835 return (r_type == R_PPC_PLTREL24
3836 || r_type == R_PPC_LOCAL24PC
3837 || r_type == R_PPC_REL24
3838 || r_type == R_PPC_REL14
3839 || r_type == R_PPC_REL14_BRTAKEN
3840 || r_type == R_PPC_REL14_BRNTAKEN
3841 || r_type == R_PPC_ADDR24
3842 || r_type == R_PPC_ADDR14
3843 || r_type == R_PPC_ADDR14_BRTAKEN
3844 || r_type == R_PPC_ADDR14_BRNTAKEN);
3845 }
3846
3847 static void
3848 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3849 {
3850 (*_bfd_error_handler)
3851 (_("%B: relocation %s cannot be used when making a shared object"),
3852 abfd,
3853 ppc_elf_howto_table[r_type]->name);
3854 bfd_set_error (bfd_error_bad_value);
3855 }
3856
3857 /* Look through the relocs for a section during the first phase, and
3858 allocate space in the global offset table or procedure linkage
3859 table. */
3860
3861 static bfd_boolean
3862 ppc_elf_check_relocs (bfd *abfd,
3863 struct bfd_link_info *info,
3864 asection *sec,
3865 const Elf_Internal_Rela *relocs)
3866 {
3867 struct ppc_elf_link_hash_table *htab;
3868 Elf_Internal_Shdr *symtab_hdr;
3869 struct elf_link_hash_entry **sym_hashes;
3870 const Elf_Internal_Rela *rel;
3871 const Elf_Internal_Rela *rel_end;
3872 asection *got2, *sreloc;
3873 struct elf_link_hash_entry *tga;
3874
3875 if (info->relocatable)
3876 return TRUE;
3877
3878 /* Don't do anything special with non-loaded, non-alloced sections.
3879 In particular, any relocs in such sections should not affect GOT
3880 and PLT reference counting (ie. we don't allow them to create GOT
3881 or PLT entries), there's no possibility or desire to optimize TLS
3882 relocs, and there's not much point in propagating relocs to shared
3883 libs that the dynamic linker won't relocate. */
3884 if ((sec->flags & SEC_ALLOC) == 0)
3885 return TRUE;
3886
3887 #ifdef DEBUG
3888 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3889 sec, abfd);
3890 #endif
3891
3892 BFD_ASSERT (is_ppc_elf (abfd));
3893
3894 /* Initialize howto table if not already done. */
3895 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3896 ppc_elf_howto_init ();
3897
3898 htab = ppc_elf_hash_table (info);
3899 if (htab->glink == NULL)
3900 {
3901 if (htab->elf.dynobj == NULL)
3902 htab->elf.dynobj = abfd;
3903 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3904 return FALSE;
3905 }
3906 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3907 FALSE, FALSE, TRUE);
3908 symtab_hdr = &elf_symtab_hdr (abfd);
3909 sym_hashes = elf_sym_hashes (abfd);
3910 got2 = bfd_get_section_by_name (abfd, ".got2");
3911 sreloc = NULL;
3912
3913 rel_end = relocs + sec->reloc_count;
3914 for (rel = relocs; rel < rel_end; rel++)
3915 {
3916 unsigned long r_symndx;
3917 enum elf_ppc_reloc_type r_type;
3918 struct elf_link_hash_entry *h;
3919 int tls_type;
3920
3921 r_symndx = ELF32_R_SYM (rel->r_info);
3922 if (r_symndx < symtab_hdr->sh_info)
3923 h = NULL;
3924 else
3925 {
3926 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3927 while (h->root.type == bfd_link_hash_indirect
3928 || h->root.type == bfd_link_hash_warning)
3929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3930
3931 /* PR15323, ref flags aren't set for references in the same
3932 object. */
3933 h->root.non_ir_ref = 1;
3934 }
3935
3936 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3937 This shows up in particular in an R_PPC_ADDR32 in the eabi
3938 startup code. */
3939 if (h != NULL
3940 && htab->got == NULL
3941 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3942 {
3943 if (htab->elf.dynobj == NULL)
3944 htab->elf.dynobj = abfd;
3945 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3946 return FALSE;
3947 BFD_ASSERT (h == htab->elf.hgot);
3948 }
3949
3950 tls_type = 0;
3951 r_type = ELF32_R_TYPE (rel->r_info);
3952 if (h == NULL && !htab->is_vxworks)
3953 {
3954 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3955 abfd, r_symndx);
3956 if (isym == NULL)
3957 return FALSE;
3958
3959 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3960 {
3961 struct plt_entry **ifunc;
3962
3963 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3964 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3965 PLT_IFUNC);
3966 if (ifunc == NULL)
3967 return FALSE;
3968
3969 /* STT_GNU_IFUNC symbols must have a PLT entry;
3970 In a non-pie executable even when there are
3971 no plt calls. */
3972 if (!info->shared
3973 || is_branch_reloc (r_type))
3974 {
3975 bfd_vma addend = 0;
3976 if (r_type == R_PPC_PLTREL24)
3977 {
3978 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3979 if (info->shared)
3980 addend = rel->r_addend;
3981 }
3982 if (!update_plt_info (abfd, ifunc, got2, addend))
3983 return FALSE;
3984 }
3985 }
3986 }
3987
3988 if (!htab->is_vxworks
3989 && is_branch_reloc (r_type)
3990 && h != NULL
3991 && h == tga)
3992 {
3993 if (rel != relocs
3994 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3995 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3996 /* We have a new-style __tls_get_addr call with a marker
3997 reloc. */
3998 ;
3999 else
4000 /* Mark this section as having an old-style call. */
4001 sec->has_tls_get_addr_call = 1;
4002 }
4003
4004 switch (r_type)
4005 {
4006 case R_PPC_TLSGD:
4007 case R_PPC_TLSLD:
4008 /* These special tls relocs tie a call to __tls_get_addr with
4009 its parameter symbol. */
4010 break;
4011
4012 case R_PPC_GOT_TLSLD16:
4013 case R_PPC_GOT_TLSLD16_LO:
4014 case R_PPC_GOT_TLSLD16_HI:
4015 case R_PPC_GOT_TLSLD16_HA:
4016 tls_type = TLS_TLS | TLS_LD;
4017 goto dogottls;
4018
4019 case R_PPC_GOT_TLSGD16:
4020 case R_PPC_GOT_TLSGD16_LO:
4021 case R_PPC_GOT_TLSGD16_HI:
4022 case R_PPC_GOT_TLSGD16_HA:
4023 tls_type = TLS_TLS | TLS_GD;
4024 goto dogottls;
4025
4026 case R_PPC_GOT_TPREL16:
4027 case R_PPC_GOT_TPREL16_LO:
4028 case R_PPC_GOT_TPREL16_HI:
4029 case R_PPC_GOT_TPREL16_HA:
4030 if (info->shared)
4031 info->flags |= DF_STATIC_TLS;
4032 tls_type = TLS_TLS | TLS_TPREL;
4033 goto dogottls;
4034
4035 case R_PPC_GOT_DTPREL16:
4036 case R_PPC_GOT_DTPREL16_LO:
4037 case R_PPC_GOT_DTPREL16_HI:
4038 case R_PPC_GOT_DTPREL16_HA:
4039 tls_type = TLS_TLS | TLS_DTPREL;
4040 dogottls:
4041 sec->has_tls_reloc = 1;
4042 /* Fall thru */
4043
4044 /* GOT16 relocations */
4045 case R_PPC_GOT16:
4046 case R_PPC_GOT16_LO:
4047 case R_PPC_GOT16_HI:
4048 case R_PPC_GOT16_HA:
4049 /* This symbol requires a global offset table entry. */
4050 if (htab->got == NULL)
4051 {
4052 if (htab->elf.dynobj == NULL)
4053 htab->elf.dynobj = abfd;
4054 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4055 return FALSE;
4056 }
4057 if (h != NULL)
4058 {
4059 h->got.refcount += 1;
4060 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4061 }
4062 else
4063 /* This is a global offset table entry for a local symbol. */
4064 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4065 return FALSE;
4066
4067 /* We may also need a plt entry if the symbol turns out to be
4068 an ifunc. */
4069 if (h != NULL && !info->shared)
4070 {
4071 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4072 return FALSE;
4073 }
4074 break;
4075
4076 /* Indirect .sdata relocation. */
4077 case R_PPC_EMB_SDAI16:
4078 if (info->shared)
4079 {
4080 bad_shared_reloc (abfd, r_type);
4081 return FALSE;
4082 }
4083 htab->sdata[0].sym->ref_regular = 1;
4084 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4085 h, rel))
4086 return FALSE;
4087 if (h != NULL)
4088 {
4089 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4090 h->non_got_ref = TRUE;
4091 }
4092 break;
4093
4094 /* Indirect .sdata2 relocation. */
4095 case R_PPC_EMB_SDA2I16:
4096 if (info->shared)
4097 {
4098 bad_shared_reloc (abfd, r_type);
4099 return FALSE;
4100 }
4101 htab->sdata[1].sym->ref_regular = 1;
4102 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4103 h, rel))
4104 return FALSE;
4105 if (h != NULL)
4106 {
4107 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4108 h->non_got_ref = TRUE;
4109 }
4110 break;
4111
4112 case R_PPC_SDAREL16:
4113 htab->sdata[0].sym->ref_regular = 1;
4114 /* Fall thru */
4115
4116 case R_PPC_VLE_SDAREL_LO16A:
4117 case R_PPC_VLE_SDAREL_LO16D:
4118 case R_PPC_VLE_SDAREL_HI16A:
4119 case R_PPC_VLE_SDAREL_HI16D:
4120 case R_PPC_VLE_SDAREL_HA16A:
4121 case R_PPC_VLE_SDAREL_HA16D:
4122 if (h != NULL)
4123 {
4124 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4125 h->non_got_ref = TRUE;
4126 }
4127 break;
4128
4129 case R_PPC_VLE_REL8:
4130 case R_PPC_VLE_REL15:
4131 case R_PPC_VLE_REL24:
4132 case R_PPC_VLE_LO16A:
4133 case R_PPC_VLE_LO16D:
4134 case R_PPC_VLE_HI16A:
4135 case R_PPC_VLE_HI16D:
4136 case R_PPC_VLE_HA16A:
4137 case R_PPC_VLE_HA16D:
4138 break;
4139
4140 case R_PPC_EMB_SDA2REL:
4141 if (info->shared)
4142 {
4143 bad_shared_reloc (abfd, r_type);
4144 return FALSE;
4145 }
4146 htab->sdata[1].sym->ref_regular = 1;
4147 if (h != NULL)
4148 {
4149 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4150 h->non_got_ref = TRUE;
4151 }
4152 break;
4153
4154 case R_PPC_VLE_SDA21_LO:
4155 case R_PPC_VLE_SDA21:
4156 case R_PPC_EMB_SDA21:
4157 case R_PPC_EMB_RELSDA:
4158 if (info->shared)
4159 {
4160 bad_shared_reloc (abfd, r_type);
4161 return FALSE;
4162 }
4163 if (h != NULL)
4164 {
4165 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4166 h->non_got_ref = TRUE;
4167 }
4168 break;
4169
4170 case R_PPC_EMB_NADDR32:
4171 case R_PPC_EMB_NADDR16:
4172 case R_PPC_EMB_NADDR16_LO:
4173 case R_PPC_EMB_NADDR16_HI:
4174 case R_PPC_EMB_NADDR16_HA:
4175 if (info->shared)
4176 {
4177 bad_shared_reloc (abfd, r_type);
4178 return FALSE;
4179 }
4180 if (h != NULL)
4181 h->non_got_ref = TRUE;
4182 break;
4183
4184 case R_PPC_PLTREL24:
4185 if (h == NULL)
4186 break;
4187 /* Fall through */
4188 case R_PPC_PLT32:
4189 case R_PPC_PLTREL32:
4190 case R_PPC_PLT16_LO:
4191 case R_PPC_PLT16_HI:
4192 case R_PPC_PLT16_HA:
4193 #ifdef DEBUG
4194 fprintf (stderr, "Reloc requires a PLT entry\n");
4195 #endif
4196 /* This symbol requires a procedure linkage table entry. We
4197 actually build the entry in finish_dynamic_symbol,
4198 because this might be a case of linking PIC code without
4199 linking in any dynamic objects, in which case we don't
4200 need to generate a procedure linkage table after all. */
4201
4202 if (h == NULL)
4203 {
4204 /* It does not make sense to have a procedure linkage
4205 table entry for a local symbol. */
4206 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4207 abfd, sec, rel->r_offset,
4208 ppc_elf_howto_table[r_type]->name);
4209 bfd_set_error (bfd_error_bad_value);
4210 return FALSE;
4211 }
4212 else
4213 {
4214 bfd_vma addend = 0;
4215
4216 if (r_type == R_PPC_PLTREL24)
4217 {
4218 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4219 if (info->shared)
4220 addend = rel->r_addend;
4221 }
4222 h->needs_plt = 1;
4223 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4224 return FALSE;
4225 }
4226 break;
4227
4228 /* The following relocations don't need to propagate the
4229 relocation if linking a shared object since they are
4230 section relative. */
4231 case R_PPC_SECTOFF:
4232 case R_PPC_SECTOFF_LO:
4233 case R_PPC_SECTOFF_HI:
4234 case R_PPC_SECTOFF_HA:
4235 case R_PPC_DTPREL16:
4236 case R_PPC_DTPREL16_LO:
4237 case R_PPC_DTPREL16_HI:
4238 case R_PPC_DTPREL16_HA:
4239 case R_PPC_TOC16:
4240 break;
4241
4242 case R_PPC_REL16:
4243 case R_PPC_REL16_LO:
4244 case R_PPC_REL16_HI:
4245 case R_PPC_REL16_HA:
4246 ppc_elf_tdata (abfd)->has_rel16 = 1;
4247 break;
4248
4249 /* These are just markers. */
4250 case R_PPC_TLS:
4251 case R_PPC_EMB_MRKREF:
4252 case R_PPC_NONE:
4253 case R_PPC_max:
4254 case R_PPC_RELAX:
4255 case R_PPC_RELAX_PLT:
4256 case R_PPC_RELAX_PLTREL24:
4257 break;
4258
4259 /* These should only appear in dynamic objects. */
4260 case R_PPC_COPY:
4261 case R_PPC_GLOB_DAT:
4262 case R_PPC_JMP_SLOT:
4263 case R_PPC_RELATIVE:
4264 case R_PPC_IRELATIVE:
4265 break;
4266
4267 /* These aren't handled yet. We'll report an error later. */
4268 case R_PPC_ADDR30:
4269 case R_PPC_EMB_RELSEC16:
4270 case R_PPC_EMB_RELST_LO:
4271 case R_PPC_EMB_RELST_HI:
4272 case R_PPC_EMB_RELST_HA:
4273 case R_PPC_EMB_BIT_FLD:
4274 break;
4275
4276 /* This refers only to functions defined in the shared library. */
4277 case R_PPC_LOCAL24PC:
4278 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4279 {
4280 htab->plt_type = PLT_OLD;
4281 htab->old_bfd = abfd;
4282 }
4283 if (h != NULL && h->type == STT_GNU_IFUNC)
4284 {
4285 if (info->shared)
4286 {
4287 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4288 abfd, sec, rel->r_offset,
4289 h->root.root.string);
4290 bfd_set_error (bfd_error_bad_value);
4291 return FALSE;
4292 }
4293 h->needs_plt = 1;
4294 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4295 return FALSE;
4296 }
4297 break;
4298
4299 /* This relocation describes the C++ object vtable hierarchy.
4300 Reconstruct it for later use during GC. */
4301 case R_PPC_GNU_VTINHERIT:
4302 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4303 return FALSE;
4304 break;
4305
4306 /* This relocation describes which C++ vtable entries are actually
4307 used. Record for later use during GC. */
4308 case R_PPC_GNU_VTENTRY:
4309 BFD_ASSERT (h != NULL);
4310 if (h != NULL
4311 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4312 return FALSE;
4313 break;
4314
4315 /* We shouldn't really be seeing these. */
4316 case R_PPC_TPREL32:
4317 case R_PPC_TPREL16:
4318 case R_PPC_TPREL16_LO:
4319 case R_PPC_TPREL16_HI:
4320 case R_PPC_TPREL16_HA:
4321 if (info->shared)
4322 info->flags |= DF_STATIC_TLS;
4323 goto dodyn;
4324
4325 /* Nor these. */
4326 case R_PPC_DTPMOD32:
4327 case R_PPC_DTPREL32:
4328 goto dodyn;
4329
4330 case R_PPC_REL32:
4331 if (h == NULL
4332 && got2 != NULL
4333 && (sec->flags & SEC_CODE) != 0
4334 && info->shared
4335 && htab->plt_type == PLT_UNSET)
4336 {
4337 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4338 the start of a function, which assembles to a REL32
4339 reference to .got2. If we detect one of these, then
4340 force the old PLT layout because the linker cannot
4341 reliably deduce the GOT pointer value needed for
4342 PLT call stubs. */
4343 asection *s;
4344 Elf_Internal_Sym *isym;
4345
4346 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4347 abfd, r_symndx);
4348 if (isym == NULL)
4349 return FALSE;
4350
4351 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4352 if (s == got2)
4353 {
4354 htab->plt_type = PLT_OLD;
4355 htab->old_bfd = abfd;
4356 }
4357 }
4358 if (h == NULL || h == htab->elf.hgot)
4359 break;
4360 /* fall through */
4361
4362 case R_PPC_ADDR32:
4363 case R_PPC_ADDR16:
4364 case R_PPC_ADDR16_LO:
4365 case R_PPC_ADDR16_HI:
4366 case R_PPC_ADDR16_HA:
4367 case R_PPC_UADDR32:
4368 case R_PPC_UADDR16:
4369 if (h != NULL && !info->shared)
4370 {
4371 /* We may need a plt entry if the symbol turns out to be
4372 a function defined in a dynamic object. */
4373 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4374 return FALSE;
4375
4376 /* We may need a copy reloc too. */
4377 h->non_got_ref = 1;
4378 h->pointer_equality_needed = 1;
4379 }
4380 goto dodyn;
4381
4382 case R_PPC_REL24:
4383 case R_PPC_REL14:
4384 case R_PPC_REL14_BRTAKEN:
4385 case R_PPC_REL14_BRNTAKEN:
4386 if (h == NULL)
4387 break;
4388 if (h == htab->elf.hgot)
4389 {
4390 if (htab->plt_type == PLT_UNSET)
4391 {
4392 htab->plt_type = PLT_OLD;
4393 htab->old_bfd = abfd;
4394 }
4395 break;
4396 }
4397 /* fall through */
4398
4399 case R_PPC_ADDR24:
4400 case R_PPC_ADDR14:
4401 case R_PPC_ADDR14_BRTAKEN:
4402 case R_PPC_ADDR14_BRNTAKEN:
4403 if (h != NULL && !info->shared)
4404 {
4405 /* We may need a plt entry if the symbol turns out to be
4406 a function defined in a dynamic object. */
4407 h->needs_plt = 1;
4408 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4409 return FALSE;
4410 break;
4411 }
4412
4413 dodyn:
4414 /* If we are creating a shared library, and this is a reloc
4415 against a global symbol, or a non PC relative reloc
4416 against a local symbol, then we need to copy the reloc
4417 into the shared library. However, if we are linking with
4418 -Bsymbolic, we do not need to copy a reloc against a
4419 global symbol which is defined in an object we are
4420 including in the link (i.e., DEF_REGULAR is set). At
4421 this point we have not seen all the input files, so it is
4422 possible that DEF_REGULAR is not set now but will be set
4423 later (it is never cleared). In case of a weak definition,
4424 DEF_REGULAR may be cleared later by a strong definition in
4425 a shared library. We account for that possibility below by
4426 storing information in the dyn_relocs field of the hash
4427 table entry. A similar situation occurs when creating
4428 shared libraries and symbol visibility changes render the
4429 symbol local.
4430
4431 If on the other hand, we are creating an executable, we
4432 may need to keep relocations for symbols satisfied by a
4433 dynamic library if we manage to avoid copy relocs for the
4434 symbol. */
4435 if ((info->shared
4436 && (must_be_dyn_reloc (info, r_type)
4437 || (h != NULL
4438 && (!SYMBOLIC_BIND (info, h)
4439 || h->root.type == bfd_link_hash_defweak
4440 || !h->def_regular))))
4441 || (ELIMINATE_COPY_RELOCS
4442 && !info->shared
4443 && h != NULL
4444 && (h->root.type == bfd_link_hash_defweak
4445 || !h->def_regular)))
4446 {
4447 #ifdef DEBUG
4448 fprintf (stderr,
4449 "ppc_elf_check_relocs needs to "
4450 "create relocation for %s\n",
4451 (h && h->root.root.string
4452 ? h->root.root.string : "<unknown>"));
4453 #endif
4454 if (sreloc == NULL)
4455 {
4456 if (htab->elf.dynobj == NULL)
4457 htab->elf.dynobj = abfd;
4458
4459 sreloc = _bfd_elf_make_dynamic_reloc_section
4460 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4461
4462 if (sreloc == NULL)
4463 return FALSE;
4464 }
4465
4466 /* If this is a global symbol, we count the number of
4467 relocations we need for this symbol. */
4468 if (h != NULL)
4469 {
4470 struct elf_dyn_relocs *p;
4471 struct elf_dyn_relocs **rel_head;
4472
4473 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4474 p = *rel_head;
4475 if (p == NULL || p->sec != sec)
4476 {
4477 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4478 if (p == NULL)
4479 return FALSE;
4480 p->next = *rel_head;
4481 *rel_head = p;
4482 p->sec = sec;
4483 p->count = 0;
4484 p->pc_count = 0;
4485 }
4486 p->count += 1;
4487 if (!must_be_dyn_reloc (info, r_type))
4488 p->pc_count += 1;
4489 }
4490 else
4491 {
4492 /* Track dynamic relocs needed for local syms too.
4493 We really need local syms available to do this
4494 easily. Oh well. */
4495 struct ppc_dyn_relocs *p;
4496 struct ppc_dyn_relocs **rel_head;
4497 bfd_boolean is_ifunc;
4498 asection *s;
4499 void *vpp;
4500 Elf_Internal_Sym *isym;
4501
4502 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4503 abfd, r_symndx);
4504 if (isym == NULL)
4505 return FALSE;
4506
4507 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4508 if (s == NULL)
4509 s = sec;
4510
4511 vpp = &elf_section_data (s)->local_dynrel;
4512 rel_head = (struct ppc_dyn_relocs **) vpp;
4513 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4514 p = *rel_head;
4515 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4516 p = p->next;
4517 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4518 {
4519 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4520 if (p == NULL)
4521 return FALSE;
4522 p->next = *rel_head;
4523 *rel_head = p;
4524 p->sec = sec;
4525 p->ifunc = is_ifunc;
4526 p->count = 0;
4527 }
4528 p->count += 1;
4529 }
4530 }
4531
4532 break;
4533 }
4534 }
4535
4536 return TRUE;
4537 }
4538 \f
4539
4540 /* Merge object attributes from IBFD into OBFD. Raise an error if
4541 there are conflicting attributes. */
4542 static bfd_boolean
4543 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4544 {
4545 obj_attribute *in_attr, *in_attrs;
4546 obj_attribute *out_attr, *out_attrs;
4547
4548 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4549 {
4550 /* This is the first object. Copy the attributes. */
4551 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4552
4553 /* Use the Tag_null value to indicate the attributes have been
4554 initialized. */
4555 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4556
4557 return TRUE;
4558 }
4559
4560 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4561 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4562
4563 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4564 non-conflicting ones. */
4565 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4566 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4567 if (in_attr->i != out_attr->i)
4568 {
4569 out_attr->type = 1;
4570 if (out_attr->i == 0)
4571 out_attr->i = in_attr->i;
4572 else if (in_attr->i == 0)
4573 ;
4574 else if (out_attr->i == 1 && in_attr->i == 2)
4575 _bfd_error_handler
4576 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4577 else if (out_attr->i == 1 && in_attr->i == 3)
4578 _bfd_error_handler
4579 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4580 obfd, ibfd);
4581 else if (out_attr->i == 3 && in_attr->i == 1)
4582 _bfd_error_handler
4583 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4584 ibfd, obfd);
4585 else if (out_attr->i == 3 && in_attr->i == 2)
4586 _bfd_error_handler
4587 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4588 ibfd, obfd);
4589 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4590 _bfd_error_handler
4591 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4592 else if (in_attr->i > 3)
4593 _bfd_error_handler
4594 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4595 in_attr->i);
4596 else
4597 _bfd_error_handler
4598 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4599 out_attr->i);
4600 }
4601
4602 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4603 merge non-conflicting ones. */
4604 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4605 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4606 if (in_attr->i != out_attr->i)
4607 {
4608 const char *in_abi = NULL, *out_abi = NULL;
4609
4610 switch (in_attr->i)
4611 {
4612 case 1: in_abi = "generic"; break;
4613 case 2: in_abi = "AltiVec"; break;
4614 case 3: in_abi = "SPE"; break;
4615 }
4616
4617 switch (out_attr->i)
4618 {
4619 case 1: out_abi = "generic"; break;
4620 case 2: out_abi = "AltiVec"; break;
4621 case 3: out_abi = "SPE"; break;
4622 }
4623
4624 out_attr->type = 1;
4625 if (out_attr->i == 0)
4626 out_attr->i = in_attr->i;
4627 else if (in_attr->i == 0)
4628 ;
4629 /* For now, allow generic to transition to AltiVec or SPE
4630 without a warning. If GCC marked files with their stack
4631 alignment and used don't-care markings for files which are
4632 not affected by the vector ABI, we could warn about this
4633 case too. */
4634 else if (out_attr->i == 1)
4635 out_attr->i = in_attr->i;
4636 else if (in_attr->i == 1)
4637 ;
4638 else if (in_abi == NULL)
4639 _bfd_error_handler
4640 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4641 in_attr->i);
4642 else if (out_abi == NULL)
4643 _bfd_error_handler
4644 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4645 in_attr->i);
4646 else
4647 _bfd_error_handler
4648 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4649 ibfd, obfd, in_abi, out_abi);
4650 }
4651
4652 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4653 and merge non-conflicting ones. */
4654 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4655 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4656 if (in_attr->i != out_attr->i)
4657 {
4658 out_attr->type = 1;
4659 if (out_attr->i == 0)
4660 out_attr->i = in_attr->i;
4661 else if (in_attr->i == 0)
4662 ;
4663 else if (out_attr->i == 1 && in_attr->i == 2)
4664 _bfd_error_handler
4665 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4666 else if (out_attr->i == 2 && in_attr->i == 1)
4667 _bfd_error_handler
4668 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4669 else if (in_attr->i > 2)
4670 _bfd_error_handler
4671 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4672 in_attr->i);
4673 else
4674 _bfd_error_handler
4675 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4676 out_attr->i);
4677 }
4678
4679 /* Merge Tag_compatibility attributes and any common GNU ones. */
4680 _bfd_elf_merge_object_attributes (ibfd, obfd);
4681
4682 return TRUE;
4683 }
4684
4685 /* Merge backend specific data from an object file to the output
4686 object file when linking. */
4687
4688 static bfd_boolean
4689 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4690 {
4691 flagword old_flags;
4692 flagword new_flags;
4693 bfd_boolean error;
4694
4695 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4696 return TRUE;
4697
4698 /* Check if we have the same endianness. */
4699 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4700 return FALSE;
4701
4702 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4703 return FALSE;
4704
4705 new_flags = elf_elfheader (ibfd)->e_flags;
4706 old_flags = elf_elfheader (obfd)->e_flags;
4707 if (!elf_flags_init (obfd))
4708 {
4709 /* First call, no flags set. */
4710 elf_flags_init (obfd) = TRUE;
4711 elf_elfheader (obfd)->e_flags = new_flags;
4712 }
4713
4714 /* Compatible flags are ok. */
4715 else if (new_flags == old_flags)
4716 ;
4717
4718 /* Incompatible flags. */
4719 else
4720 {
4721 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4722 to be linked with either. */
4723 error = FALSE;
4724 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4725 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4726 {
4727 error = TRUE;
4728 (*_bfd_error_handler)
4729 (_("%B: compiled with -mrelocatable and linked with "
4730 "modules compiled normally"), ibfd);
4731 }
4732 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4733 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4734 {
4735 error = TRUE;
4736 (*_bfd_error_handler)
4737 (_("%B: compiled normally and linked with "
4738 "modules compiled with -mrelocatable"), ibfd);
4739 }
4740
4741 /* The output is -mrelocatable-lib iff both the input files are. */
4742 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4743 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4744
4745 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4746 but each input file is either -mrelocatable or -mrelocatable-lib. */
4747 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4748 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4749 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4750 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4751
4752 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4753 any module uses it. */
4754 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4755
4756 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4757 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4758
4759 /* Warn about any other mismatches. */
4760 if (new_flags != old_flags)
4761 {
4762 error = TRUE;
4763 (*_bfd_error_handler)
4764 (_("%B: uses different e_flags (0x%lx) fields "
4765 "than previous modules (0x%lx)"),
4766 ibfd, (long) new_flags, (long) old_flags);
4767 }
4768
4769 if (error)
4770 {
4771 bfd_set_error (bfd_error_bad_value);
4772 return FALSE;
4773 }
4774 }
4775
4776 return TRUE;
4777 }
4778
4779 static void
4780 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4781 bfd_vma value,
4782 split16_format_type split16_format)
4783
4784 {
4785 unsigned int insn, top5;
4786
4787 insn = bfd_get_32 (output_bfd, loc);
4788 top5 = value & 0xf800;
4789 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4790 insn |= top5;
4791 insn |= value & 0x7ff;
4792 bfd_put_32 (output_bfd, insn, loc);
4793 }
4794
4795 \f
4796 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4797 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4798 int
4799 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4800 struct bfd_link_info *info)
4801 {
4802 struct ppc_elf_link_hash_table *htab;
4803 flagword flags;
4804
4805 htab = ppc_elf_hash_table (info);
4806
4807 if (htab->plt_type == PLT_UNSET)
4808 {
4809 struct elf_link_hash_entry *h;
4810
4811 if (htab->params->plt_style == PLT_OLD)
4812 htab->plt_type = PLT_OLD;
4813 else if (info->shared
4814 && htab->elf.dynamic_sections_created
4815 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4816 FALSE, FALSE, TRUE)) != NULL
4817 && (h->type == STT_FUNC
4818 || h->needs_plt)
4819 && h->ref_regular
4820 && !(SYMBOL_CALLS_LOCAL (info, h)
4821 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4822 && h->root.type == bfd_link_hash_undefweak)))
4823 {
4824 /* Profiling of shared libs (and pies) is not supported with
4825 secure plt, because ppc32 does profiling before a
4826 function prologue and a secure plt pic call stubs needs
4827 r30 to be set up. */
4828 htab->plt_type = PLT_OLD;
4829 }
4830 else
4831 {
4832 bfd *ibfd;
4833 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4834
4835 /* Look through the reloc flags left by ppc_elf_check_relocs.
4836 Use the old style bss plt if a file makes plt calls
4837 without using the new relocs, and if ld isn't given
4838 --secure-plt and we never see REL16 relocs. */
4839 if (plt_type == PLT_UNSET)
4840 plt_type = PLT_OLD;
4841 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4842 if (is_ppc_elf (ibfd))
4843 {
4844 if (ppc_elf_tdata (ibfd)->has_rel16)
4845 plt_type = PLT_NEW;
4846 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4847 {
4848 plt_type = PLT_OLD;
4849 htab->old_bfd = ibfd;
4850 break;
4851 }
4852 }
4853 htab->plt_type = plt_type;
4854 }
4855 }
4856 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4857 {
4858 if (htab->old_bfd != NULL)
4859 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4860 htab->old_bfd);
4861 else
4862 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4863 }
4864
4865 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4866
4867 if (htab->plt_type == PLT_NEW)
4868 {
4869 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4870 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4871
4872 /* The new PLT is a loaded section. */
4873 if (htab->plt != NULL
4874 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4875 return -1;
4876
4877 /* The new GOT is not executable. */
4878 if (htab->got != NULL
4879 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4880 return -1;
4881 }
4882 else
4883 {
4884 /* Stop an unused .glink section from affecting .text alignment. */
4885 if (htab->glink != NULL
4886 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4887 return -1;
4888 }
4889 return htab->plt_type == PLT_NEW;
4890 }
4891 \f
4892 /* Return the section that should be marked against GC for a given
4893 relocation. */
4894
4895 static asection *
4896 ppc_elf_gc_mark_hook (asection *sec,
4897 struct bfd_link_info *info,
4898 Elf_Internal_Rela *rel,
4899 struct elf_link_hash_entry *h,
4900 Elf_Internal_Sym *sym)
4901 {
4902 if (h != NULL)
4903 switch (ELF32_R_TYPE (rel->r_info))
4904 {
4905 case R_PPC_GNU_VTINHERIT:
4906 case R_PPC_GNU_VTENTRY:
4907 return NULL;
4908 }
4909
4910 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4911 }
4912
4913 /* Update the got, plt and dynamic reloc reference counts for the
4914 section being removed. */
4915
4916 static bfd_boolean
4917 ppc_elf_gc_sweep_hook (bfd *abfd,
4918 struct bfd_link_info *info,
4919 asection *sec,
4920 const Elf_Internal_Rela *relocs)
4921 {
4922 struct ppc_elf_link_hash_table *htab;
4923 Elf_Internal_Shdr *symtab_hdr;
4924 struct elf_link_hash_entry **sym_hashes;
4925 bfd_signed_vma *local_got_refcounts;
4926 const Elf_Internal_Rela *rel, *relend;
4927 asection *got2;
4928
4929 if (info->relocatable)
4930 return TRUE;
4931
4932 if ((sec->flags & SEC_ALLOC) == 0)
4933 return TRUE;
4934
4935 elf_section_data (sec)->local_dynrel = NULL;
4936
4937 htab = ppc_elf_hash_table (info);
4938 symtab_hdr = &elf_symtab_hdr (abfd);
4939 sym_hashes = elf_sym_hashes (abfd);
4940 local_got_refcounts = elf_local_got_refcounts (abfd);
4941 got2 = bfd_get_section_by_name (abfd, ".got2");
4942
4943 relend = relocs + sec->reloc_count;
4944 for (rel = relocs; rel < relend; rel++)
4945 {
4946 unsigned long r_symndx;
4947 enum elf_ppc_reloc_type r_type;
4948 struct elf_link_hash_entry *h = NULL;
4949
4950 r_symndx = ELF32_R_SYM (rel->r_info);
4951 if (r_symndx >= symtab_hdr->sh_info)
4952 {
4953 struct elf_dyn_relocs **pp, *p;
4954 struct ppc_elf_link_hash_entry *eh;
4955
4956 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4957 while (h->root.type == bfd_link_hash_indirect
4958 || h->root.type == bfd_link_hash_warning)
4959 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4960 eh = (struct ppc_elf_link_hash_entry *) h;
4961
4962 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4963 if (p->sec == sec)
4964 {
4965 /* Everything must go for SEC. */
4966 *pp = p->next;
4967 break;
4968 }
4969 }
4970
4971 r_type = ELF32_R_TYPE (rel->r_info);
4972 if (!htab->is_vxworks
4973 && h == NULL
4974 && local_got_refcounts != NULL
4975 && (!info->shared
4976 || is_branch_reloc (r_type)))
4977 {
4978 struct plt_entry **local_plt = (struct plt_entry **)
4979 (local_got_refcounts + symtab_hdr->sh_info);
4980 char *local_got_tls_masks = (char *)
4981 (local_plt + symtab_hdr->sh_info);
4982 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4983 {
4984 struct plt_entry **ifunc = local_plt + r_symndx;
4985 bfd_vma addend = 0;
4986 struct plt_entry *ent;
4987
4988 if (r_type == R_PPC_PLTREL24 && info->shared)
4989 addend = rel->r_addend;
4990 ent = find_plt_ent (ifunc, got2, addend);
4991 if (ent->plt.refcount > 0)
4992 ent->plt.refcount -= 1;
4993 continue;
4994 }
4995 }
4996
4997 switch (r_type)
4998 {
4999 case R_PPC_GOT_TLSLD16:
5000 case R_PPC_GOT_TLSLD16_LO:
5001 case R_PPC_GOT_TLSLD16_HI:
5002 case R_PPC_GOT_TLSLD16_HA:
5003 case R_PPC_GOT_TLSGD16:
5004 case R_PPC_GOT_TLSGD16_LO:
5005 case R_PPC_GOT_TLSGD16_HI:
5006 case R_PPC_GOT_TLSGD16_HA:
5007 case R_PPC_GOT_TPREL16:
5008 case R_PPC_GOT_TPREL16_LO:
5009 case R_PPC_GOT_TPREL16_HI:
5010 case R_PPC_GOT_TPREL16_HA:
5011 case R_PPC_GOT_DTPREL16:
5012 case R_PPC_GOT_DTPREL16_LO:
5013 case R_PPC_GOT_DTPREL16_HI:
5014 case R_PPC_GOT_DTPREL16_HA:
5015 case R_PPC_GOT16:
5016 case R_PPC_GOT16_LO:
5017 case R_PPC_GOT16_HI:
5018 case R_PPC_GOT16_HA:
5019 if (h != NULL)
5020 {
5021 if (h->got.refcount > 0)
5022 h->got.refcount--;
5023 if (!info->shared)
5024 {
5025 struct plt_entry *ent;
5026
5027 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5028 if (ent != NULL && ent->plt.refcount > 0)
5029 ent->plt.refcount -= 1;
5030 }
5031 }
5032 else if (local_got_refcounts != NULL)
5033 {
5034 if (local_got_refcounts[r_symndx] > 0)
5035 local_got_refcounts[r_symndx]--;
5036 }
5037 break;
5038
5039 case R_PPC_REL24:
5040 case R_PPC_REL14:
5041 case R_PPC_REL14_BRTAKEN:
5042 case R_PPC_REL14_BRNTAKEN:
5043 case R_PPC_REL32:
5044 if (h == NULL || h == htab->elf.hgot)
5045 break;
5046 /* Fall thru */
5047
5048 case R_PPC_ADDR32:
5049 case R_PPC_ADDR24:
5050 case R_PPC_ADDR16:
5051 case R_PPC_ADDR16_LO:
5052 case R_PPC_ADDR16_HI:
5053 case R_PPC_ADDR16_HA:
5054 case R_PPC_ADDR14:
5055 case R_PPC_ADDR14_BRTAKEN:
5056 case R_PPC_ADDR14_BRNTAKEN:
5057 case R_PPC_UADDR32:
5058 case R_PPC_UADDR16:
5059 if (info->shared)
5060 break;
5061
5062 case R_PPC_PLT32:
5063 case R_PPC_PLTREL24:
5064 case R_PPC_PLTREL32:
5065 case R_PPC_PLT16_LO:
5066 case R_PPC_PLT16_HI:
5067 case R_PPC_PLT16_HA:
5068 if (h != NULL)
5069 {
5070 bfd_vma addend = 0;
5071 struct plt_entry *ent;
5072
5073 if (r_type == R_PPC_PLTREL24 && info->shared)
5074 addend = rel->r_addend;
5075 ent = find_plt_ent (&h->plt.plist, got2, addend);
5076 if (ent != NULL && ent->plt.refcount > 0)
5077 ent->plt.refcount -= 1;
5078 }
5079 break;
5080
5081 default:
5082 break;
5083 }
5084 }
5085 return TRUE;
5086 }
5087 \f
5088 /* Set plt output section type, htab->tls_get_addr, and call the
5089 generic ELF tls_setup function. */
5090
5091 asection *
5092 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5093 {
5094 struct ppc_elf_link_hash_table *htab;
5095
5096 htab = ppc_elf_hash_table (info);
5097 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5098 FALSE, FALSE, TRUE);
5099 if (!htab->params->no_tls_get_addr_opt)
5100 {
5101 struct elf_link_hash_entry *opt, *tga;
5102 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5103 FALSE, FALSE, TRUE);
5104 if (opt != NULL
5105 && (opt->root.type == bfd_link_hash_defined
5106 || opt->root.type == bfd_link_hash_defweak))
5107 {
5108 /* If glibc supports an optimized __tls_get_addr call stub,
5109 signalled by the presence of __tls_get_addr_opt, and we'll
5110 be calling __tls_get_addr via a plt call stub, then
5111 make __tls_get_addr point to __tls_get_addr_opt. */
5112 tga = htab->tls_get_addr;
5113 if (htab->elf.dynamic_sections_created
5114 && tga != NULL
5115 && (tga->type == STT_FUNC
5116 || tga->needs_plt)
5117 && !(SYMBOL_CALLS_LOCAL (info, tga)
5118 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5119 && tga->root.type == bfd_link_hash_undefweak)))
5120 {
5121 struct plt_entry *ent;
5122 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5123 if (ent->plt.refcount > 0)
5124 break;
5125 if (ent != NULL)
5126 {
5127 tga->root.type = bfd_link_hash_indirect;
5128 tga->root.u.i.link = &opt->root;
5129 ppc_elf_copy_indirect_symbol (info, opt, tga);
5130 if (opt->dynindx != -1)
5131 {
5132 /* Use __tls_get_addr_opt in dynamic relocations. */
5133 opt->dynindx = -1;
5134 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5135 opt->dynstr_index);
5136 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5137 return FALSE;
5138 }
5139 htab->tls_get_addr = opt;
5140 }
5141 }
5142 }
5143 else
5144 htab->params->no_tls_get_addr_opt = TRUE;
5145 }
5146 if (htab->plt_type == PLT_NEW
5147 && htab->plt != NULL
5148 && htab->plt->output_section != NULL)
5149 {
5150 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5151 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5152 }
5153
5154 return _bfd_elf_tls_setup (obfd, info);
5155 }
5156
5157 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5158 HASH. */
5159
5160 static bfd_boolean
5161 branch_reloc_hash_match (const bfd *ibfd,
5162 const Elf_Internal_Rela *rel,
5163 const struct elf_link_hash_entry *hash)
5164 {
5165 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5166 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5167 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5168
5169 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5170 {
5171 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5172 struct elf_link_hash_entry *h;
5173
5174 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5175 while (h->root.type == bfd_link_hash_indirect
5176 || h->root.type == bfd_link_hash_warning)
5177 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5178 if (h == hash)
5179 return TRUE;
5180 }
5181 return FALSE;
5182 }
5183
5184 /* Run through all the TLS relocs looking for optimization
5185 opportunities. */
5186
5187 bfd_boolean
5188 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5189 struct bfd_link_info *info)
5190 {
5191 bfd *ibfd;
5192 asection *sec;
5193 struct ppc_elf_link_hash_table *htab;
5194 int pass;
5195
5196 if (info->relocatable || !info->executable)
5197 return TRUE;
5198
5199 htab = ppc_elf_hash_table (info);
5200 if (htab == NULL)
5201 return FALSE;
5202
5203 /* Make two passes through the relocs. First time check that tls
5204 relocs involved in setting up a tls_get_addr call are indeed
5205 followed by such a call. If they are not, don't do any tls
5206 optimization. On the second pass twiddle tls_mask flags to
5207 notify relocate_section that optimization can be done, and
5208 adjust got and plt refcounts. */
5209 for (pass = 0; pass < 2; ++pass)
5210 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5211 {
5212 Elf_Internal_Sym *locsyms = NULL;
5213 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5214 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5215
5216 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5217 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5218 {
5219 Elf_Internal_Rela *relstart, *rel, *relend;
5220 int expecting_tls_get_addr = 0;
5221
5222 /* Read the relocations. */
5223 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5224 info->keep_memory);
5225 if (relstart == NULL)
5226 return FALSE;
5227
5228 relend = relstart + sec->reloc_count;
5229 for (rel = relstart; rel < relend; rel++)
5230 {
5231 enum elf_ppc_reloc_type r_type;
5232 unsigned long r_symndx;
5233 struct elf_link_hash_entry *h = NULL;
5234 char *tls_mask;
5235 char tls_set, tls_clear;
5236 bfd_boolean is_local;
5237 bfd_signed_vma *got_count;
5238
5239 r_symndx = ELF32_R_SYM (rel->r_info);
5240 if (r_symndx >= symtab_hdr->sh_info)
5241 {
5242 struct elf_link_hash_entry **sym_hashes;
5243
5244 sym_hashes = elf_sym_hashes (ibfd);
5245 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5246 while (h->root.type == bfd_link_hash_indirect
5247 || h->root.type == bfd_link_hash_warning)
5248 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5249 }
5250
5251 is_local = FALSE;
5252 if (h == NULL
5253 || !h->def_dynamic)
5254 is_local = TRUE;
5255
5256 r_type = ELF32_R_TYPE (rel->r_info);
5257 /* If this section has old-style __tls_get_addr calls
5258 without marker relocs, then check that each
5259 __tls_get_addr call reloc is preceded by a reloc
5260 that conceivably belongs to the __tls_get_addr arg
5261 setup insn. If we don't find matching arg setup
5262 relocs, don't do any tls optimization. */
5263 if (pass == 0
5264 && sec->has_tls_get_addr_call
5265 && h != NULL
5266 && h == htab->tls_get_addr
5267 && !expecting_tls_get_addr
5268 && is_branch_reloc (r_type))
5269 {
5270 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5271 "TLS optimization disabled\n",
5272 ibfd, sec, rel->r_offset);
5273 if (elf_section_data (sec)->relocs != relstart)
5274 free (relstart);
5275 return TRUE;
5276 }
5277
5278 expecting_tls_get_addr = 0;
5279 switch (r_type)
5280 {
5281 case R_PPC_GOT_TLSLD16:
5282 case R_PPC_GOT_TLSLD16_LO:
5283 expecting_tls_get_addr = 1;
5284 /* Fall thru */
5285
5286 case R_PPC_GOT_TLSLD16_HI:
5287 case R_PPC_GOT_TLSLD16_HA:
5288 /* These relocs should never be against a symbol
5289 defined in a shared lib. Leave them alone if
5290 that turns out to be the case. */
5291 if (!is_local)
5292 continue;
5293
5294 /* LD -> LE */
5295 tls_set = 0;
5296 tls_clear = TLS_LD;
5297 break;
5298
5299 case R_PPC_GOT_TLSGD16:
5300 case R_PPC_GOT_TLSGD16_LO:
5301 expecting_tls_get_addr = 1;
5302 /* Fall thru */
5303
5304 case R_PPC_GOT_TLSGD16_HI:
5305 case R_PPC_GOT_TLSGD16_HA:
5306 if (is_local)
5307 /* GD -> LE */
5308 tls_set = 0;
5309 else
5310 /* GD -> IE */
5311 tls_set = TLS_TLS | TLS_TPRELGD;
5312 tls_clear = TLS_GD;
5313 break;
5314
5315 case R_PPC_GOT_TPREL16:
5316 case R_PPC_GOT_TPREL16_LO:
5317 case R_PPC_GOT_TPREL16_HI:
5318 case R_PPC_GOT_TPREL16_HA:
5319 if (is_local)
5320 {
5321 /* IE -> LE */
5322 tls_set = 0;
5323 tls_clear = TLS_TPREL;
5324 break;
5325 }
5326 else
5327 continue;
5328
5329 case R_PPC_TLSGD:
5330 case R_PPC_TLSLD:
5331 expecting_tls_get_addr = 2;
5332 tls_set = 0;
5333 tls_clear = 0;
5334 break;
5335
5336 default:
5337 continue;
5338 }
5339
5340 if (pass == 0)
5341 {
5342 if (!expecting_tls_get_addr
5343 || (expecting_tls_get_addr == 1
5344 && !sec->has_tls_get_addr_call))
5345 continue;
5346
5347 if (rel + 1 < relend
5348 && branch_reloc_hash_match (ibfd, rel + 1,
5349 htab->tls_get_addr))
5350 continue;
5351
5352 /* Uh oh, we didn't find the expected call. We
5353 could just mark this symbol to exclude it
5354 from tls optimization but it's safer to skip
5355 the entire optimization. */
5356 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5357 "TLS optimization disabled\n"),
5358 ibfd, sec, rel->r_offset);
5359 if (elf_section_data (sec)->relocs != relstart)
5360 free (relstart);
5361 return TRUE;
5362 }
5363
5364 if (expecting_tls_get_addr)
5365 {
5366 struct plt_entry *ent;
5367 bfd_vma addend = 0;
5368
5369 if (info->shared
5370 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5371 addend = rel[1].r_addend;
5372 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5373 got2, addend);
5374 if (ent != NULL && ent->plt.refcount > 0)
5375 ent->plt.refcount -= 1;
5376
5377 if (expecting_tls_get_addr == 2)
5378 continue;
5379 }
5380
5381 if (h != NULL)
5382 {
5383 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5384 got_count = &h->got.refcount;
5385 }
5386 else
5387 {
5388 bfd_signed_vma *lgot_refs;
5389 struct plt_entry **local_plt;
5390 char *lgot_masks;
5391
5392 if (locsyms == NULL)
5393 {
5394 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5395 if (locsyms == NULL)
5396 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5397 symtab_hdr->sh_info,
5398 0, NULL, NULL, NULL);
5399 if (locsyms == NULL)
5400 {
5401 if (elf_section_data (sec)->relocs != relstart)
5402 free (relstart);
5403 return FALSE;
5404 }
5405 }
5406 lgot_refs = elf_local_got_refcounts (ibfd);
5407 if (lgot_refs == NULL)
5408 abort ();
5409 local_plt = (struct plt_entry **)
5410 (lgot_refs + symtab_hdr->sh_info);
5411 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5412 tls_mask = &lgot_masks[r_symndx];
5413 got_count = &lgot_refs[r_symndx];
5414 }
5415
5416 if (tls_set == 0)
5417 {
5418 /* We managed to get rid of a got entry. */
5419 if (*got_count > 0)
5420 *got_count -= 1;
5421 }
5422
5423 *tls_mask |= tls_set;
5424 *tls_mask &= ~tls_clear;
5425 }
5426
5427 if (elf_section_data (sec)->relocs != relstart)
5428 free (relstart);
5429 }
5430
5431 if (locsyms != NULL
5432 && (symtab_hdr->contents != (unsigned char *) locsyms))
5433 {
5434 if (!info->keep_memory)
5435 free (locsyms);
5436 else
5437 symtab_hdr->contents = (unsigned char *) locsyms;
5438 }
5439 }
5440 return TRUE;
5441 }
5442 \f
5443 /* Return true if we have dynamic relocs that apply to read-only sections. */
5444
5445 static bfd_boolean
5446 readonly_dynrelocs (struct elf_link_hash_entry *h)
5447 {
5448 struct elf_dyn_relocs *p;
5449
5450 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5451 {
5452 asection *s = p->sec->output_section;
5453
5454 if (s != NULL
5455 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5456 == (SEC_READONLY | SEC_ALLOC)))
5457 return TRUE;
5458 }
5459 return FALSE;
5460 }
5461
5462 /* Adjust a symbol defined by a dynamic object and referenced by a
5463 regular object. The current definition is in some section of the
5464 dynamic object, but we're not including those sections. We have to
5465 change the definition to something the rest of the link can
5466 understand. */
5467
5468 static bfd_boolean
5469 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5470 struct elf_link_hash_entry *h)
5471 {
5472 struct ppc_elf_link_hash_table *htab;
5473 asection *s;
5474
5475 #ifdef DEBUG
5476 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5477 h->root.root.string);
5478 #endif
5479
5480 /* Make sure we know what is going on here. */
5481 htab = ppc_elf_hash_table (info);
5482 BFD_ASSERT (htab->elf.dynobj != NULL
5483 && (h->needs_plt
5484 || h->type == STT_GNU_IFUNC
5485 || h->u.weakdef != NULL
5486 || (h->def_dynamic
5487 && h->ref_regular
5488 && !h->def_regular)));
5489
5490 /* Deal with function syms. */
5491 if (h->type == STT_FUNC
5492 || h->type == STT_GNU_IFUNC
5493 || h->needs_plt)
5494 {
5495 /* Clear procedure linkage table information for any symbol that
5496 won't need a .plt entry. */
5497 struct plt_entry *ent;
5498 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5499 if (ent->plt.refcount > 0)
5500 break;
5501 if (ent == NULL
5502 || (h->type != STT_GNU_IFUNC
5503 && (SYMBOL_CALLS_LOCAL (info, h)
5504 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5505 && h->root.type == bfd_link_hash_undefweak))))
5506 {
5507 /* A PLT entry is not required/allowed when:
5508
5509 1. We are not using ld.so; because then the PLT entry
5510 can't be set up, so we can't use one. In this case,
5511 ppc_elf_adjust_dynamic_symbol won't even be called.
5512
5513 2. GC has rendered the entry unused.
5514
5515 3. We know for certain that a call to this symbol
5516 will go to this object, or will remain undefined. */
5517 h->plt.plist = NULL;
5518 h->needs_plt = 0;
5519 h->pointer_equality_needed = 0;
5520 }
5521 else
5522 {
5523 /* Taking a function's address in a read/write section
5524 doesn't require us to define the function symbol in the
5525 executable on a plt call stub. A dynamic reloc can
5526 be used instead. */
5527 if (h->pointer_equality_needed
5528 && h->type != STT_GNU_IFUNC
5529 && !htab->is_vxworks
5530 && !ppc_elf_hash_entry (h)->has_sda_refs
5531 && !readonly_dynrelocs (h))
5532 {
5533 h->pointer_equality_needed = 0;
5534 h->non_got_ref = 0;
5535 }
5536
5537 /* After adjust_dynamic_symbol, non_got_ref set in the
5538 non-shared case means that we have allocated space in
5539 .dynbss for the symbol and thus dyn_relocs for this
5540 symbol should be discarded.
5541 If we get here we know we are making a PLT entry for this
5542 symbol, and in an executable we'd normally resolve
5543 relocations against this symbol to the PLT entry. Allow
5544 dynamic relocs if the reference is weak, and the dynamic
5545 relocs will not cause text relocation. */
5546 else if (!h->ref_regular_nonweak
5547 && h->non_got_ref
5548 && h->type != STT_GNU_IFUNC
5549 && !htab->is_vxworks
5550 && !ppc_elf_hash_entry (h)->has_sda_refs
5551 && !readonly_dynrelocs (h))
5552 h->non_got_ref = 0;
5553 }
5554 return TRUE;
5555 }
5556 else
5557 h->plt.plist = NULL;
5558
5559 /* If this is a weak symbol, and there is a real definition, the
5560 processor independent code will have arranged for us to see the
5561 real definition first, and we can just use the same value. */
5562 if (h->u.weakdef != NULL)
5563 {
5564 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5565 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5566 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5567 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5568 if (ELIMINATE_COPY_RELOCS)
5569 h->non_got_ref = h->u.weakdef->non_got_ref;
5570 return TRUE;
5571 }
5572
5573 /* This is a reference to a symbol defined by a dynamic object which
5574 is not a function. */
5575
5576 /* If we are creating a shared library, we must presume that the
5577 only references to the symbol are via the global offset table.
5578 For such cases we need not do anything here; the relocations will
5579 be handled correctly by relocate_section. */
5580 if (info->shared)
5581 return TRUE;
5582
5583 /* If there are no references to this symbol that do not use the
5584 GOT, we don't need to generate a copy reloc. */
5585 if (!h->non_got_ref)
5586 return TRUE;
5587
5588 /* If we didn't find any dynamic relocs in read-only sections, then
5589 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5590 We can't do this if there are any small data relocations. This
5591 doesn't work on VxWorks, where we can not have dynamic
5592 relocations (other than copy and jump slot relocations) in an
5593 executable. */
5594 if (ELIMINATE_COPY_RELOCS
5595 && !ppc_elf_hash_entry (h)->has_sda_refs
5596 && !htab->is_vxworks
5597 && !h->def_regular
5598 && !readonly_dynrelocs (h))
5599 {
5600 h->non_got_ref = 0;
5601 return TRUE;
5602 }
5603
5604 /* We must allocate the symbol in our .dynbss section, which will
5605 become part of the .bss section of the executable. There will be
5606 an entry for this symbol in the .dynsym section. The dynamic
5607 object will contain position independent code, so all references
5608 from the dynamic object to this symbol will go through the global
5609 offset table. The dynamic linker will use the .dynsym entry to
5610 determine the address it must put in the global offset table, so
5611 both the dynamic object and the regular object will refer to the
5612 same memory location for the variable.
5613
5614 Of course, if the symbol is referenced using SDAREL relocs, we
5615 must instead allocate it in .sbss. */
5616
5617 if (ppc_elf_hash_entry (h)->has_sda_refs)
5618 s = htab->dynsbss;
5619 else
5620 s = htab->dynbss;
5621 BFD_ASSERT (s != NULL);
5622
5623 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5624 copy the initial value out of the dynamic object and into the
5625 runtime process image. We need to remember the offset into the
5626 .rela.bss section we are going to use. */
5627 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5628 {
5629 asection *srel;
5630
5631 if (ppc_elf_hash_entry (h)->has_sda_refs)
5632 srel = htab->relsbss;
5633 else
5634 srel = htab->relbss;
5635 BFD_ASSERT (srel != NULL);
5636 srel->size += sizeof (Elf32_External_Rela);
5637 h->needs_copy = 1;
5638 }
5639
5640 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5641 }
5642 \f
5643 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5644 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5645 specifying the addend on the plt relocation. For -fpic code, the sym
5646 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5647 xxxxxxxx.got2.plt_pic32.<callee>. */
5648
5649 static bfd_boolean
5650 add_stub_sym (struct plt_entry *ent,
5651 struct elf_link_hash_entry *h,
5652 struct bfd_link_info *info)
5653 {
5654 struct elf_link_hash_entry *sh;
5655 size_t len1, len2, len3;
5656 char *name;
5657 const char *stub;
5658 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5659
5660 if (info->shared)
5661 stub = ".plt_pic32.";
5662 else
5663 stub = ".plt_call32.";
5664
5665 len1 = strlen (h->root.root.string);
5666 len2 = strlen (stub);
5667 len3 = 0;
5668 if (ent->sec)
5669 len3 = strlen (ent->sec->name);
5670 name = bfd_malloc (len1 + len2 + len3 + 9);
5671 if (name == NULL)
5672 return FALSE;
5673 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5674 if (ent->sec)
5675 memcpy (name + 8, ent->sec->name, len3);
5676 memcpy (name + 8 + len3, stub, len2);
5677 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5678 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5679 if (sh == NULL)
5680 return FALSE;
5681 if (sh->root.type == bfd_link_hash_new)
5682 {
5683 sh->root.type = bfd_link_hash_defined;
5684 sh->root.u.def.section = htab->glink;
5685 sh->root.u.def.value = ent->glink_offset;
5686 sh->ref_regular = 1;
5687 sh->def_regular = 1;
5688 sh->ref_regular_nonweak = 1;
5689 sh->forced_local = 1;
5690 sh->non_elf = 0;
5691 }
5692 return TRUE;
5693 }
5694
5695 /* Allocate NEED contiguous space in .got, and return the offset.
5696 Handles allocation of the got header when crossing 32k. */
5697
5698 static bfd_vma
5699 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5700 {
5701 bfd_vma where;
5702 unsigned int max_before_header;
5703
5704 if (htab->plt_type == PLT_VXWORKS)
5705 {
5706 where = htab->got->size;
5707 htab->got->size += need;
5708 }
5709 else
5710 {
5711 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5712 if (need <= htab->got_gap)
5713 {
5714 where = max_before_header - htab->got_gap;
5715 htab->got_gap -= need;
5716 }
5717 else
5718 {
5719 if (htab->got->size + need > max_before_header
5720 && htab->got->size <= max_before_header)
5721 {
5722 htab->got_gap = max_before_header - htab->got->size;
5723 htab->got->size = max_before_header + htab->got_header_size;
5724 }
5725 where = htab->got->size;
5726 htab->got->size += need;
5727 }
5728 }
5729 return where;
5730 }
5731
5732 /* Allocate space in associated reloc sections for dynamic relocs. */
5733
5734 static bfd_boolean
5735 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5736 {
5737 struct bfd_link_info *info = inf;
5738 struct ppc_elf_link_hash_entry *eh;
5739 struct ppc_elf_link_hash_table *htab;
5740 struct elf_dyn_relocs *p;
5741
5742 if (h->root.type == bfd_link_hash_indirect)
5743 return TRUE;
5744
5745 htab = ppc_elf_hash_table (info);
5746 if (htab->elf.dynamic_sections_created
5747 || h->type == STT_GNU_IFUNC)
5748 {
5749 struct plt_entry *ent;
5750 bfd_boolean doneone = FALSE;
5751 bfd_vma plt_offset = 0, glink_offset = 0;
5752 bfd_boolean dyn;
5753
5754 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5755 if (ent->plt.refcount > 0)
5756 {
5757 /* Make sure this symbol is output as a dynamic symbol. */
5758 if (h->dynindx == -1
5759 && !h->forced_local
5760 && !h->def_regular
5761 && htab->elf.dynamic_sections_created)
5762 {
5763 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5764 return FALSE;
5765 }
5766
5767 dyn = htab->elf.dynamic_sections_created;
5768 if (info->shared
5769 || h->type == STT_GNU_IFUNC
5770 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5771 {
5772 asection *s = htab->plt;
5773 if (!dyn || h->dynindx == -1)
5774 s = htab->iplt;
5775
5776 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5777 {
5778 if (!doneone)
5779 {
5780 plt_offset = s->size;
5781 s->size += 4;
5782 }
5783 ent->plt.offset = plt_offset;
5784
5785 s = htab->glink;
5786 if (!doneone || info->shared)
5787 {
5788 glink_offset = s->size;
5789 s->size += GLINK_ENTRY_SIZE;
5790 if (h == htab->tls_get_addr
5791 && !htab->params->no_tls_get_addr_opt)
5792 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5793 }
5794 if (!doneone
5795 && !info->shared
5796 && h->def_dynamic
5797 && !h->def_regular)
5798 {
5799 h->root.u.def.section = s;
5800 h->root.u.def.value = glink_offset;
5801 }
5802 ent->glink_offset = glink_offset;
5803
5804 if (htab->params->emit_stub_syms
5805 && !add_stub_sym (ent, h, info))
5806 return FALSE;
5807 }
5808 else
5809 {
5810 if (!doneone)
5811 {
5812 /* If this is the first .plt entry, make room
5813 for the special first entry. */
5814 if (s->size == 0)
5815 s->size += htab->plt_initial_entry_size;
5816
5817 /* The PowerPC PLT is actually composed of two
5818 parts, the first part is 2 words (for a load
5819 and a jump), and then there is a remaining
5820 word available at the end. */
5821 plt_offset = (htab->plt_initial_entry_size
5822 + (htab->plt_slot_size
5823 * ((s->size
5824 - htab->plt_initial_entry_size)
5825 / htab->plt_entry_size)));
5826
5827 /* If this symbol is not defined in a regular
5828 file, and we are not generating a shared
5829 library, then set the symbol to this location
5830 in the .plt. This is to avoid text
5831 relocations, and is required to make
5832 function pointers compare as equal between
5833 the normal executable and the shared library. */
5834 if (! info->shared
5835 && h->def_dynamic
5836 && !h->def_regular)
5837 {
5838 h->root.u.def.section = s;
5839 h->root.u.def.value = plt_offset;
5840 }
5841
5842 /* Make room for this entry. */
5843 s->size += htab->plt_entry_size;
5844 /* After the 8192nd entry, room for two entries
5845 is allocated. */
5846 if (htab->plt_type == PLT_OLD
5847 && (s->size - htab->plt_initial_entry_size)
5848 / htab->plt_entry_size
5849 > PLT_NUM_SINGLE_ENTRIES)
5850 s->size += htab->plt_entry_size;
5851 }
5852 ent->plt.offset = plt_offset;
5853 }
5854
5855 /* We also need to make an entry in the .rela.plt section. */
5856 if (!doneone)
5857 {
5858 if (!htab->elf.dynamic_sections_created
5859 || h->dynindx == -1)
5860 htab->reliplt->size += sizeof (Elf32_External_Rela);
5861 else
5862 {
5863 htab->relplt->size += sizeof (Elf32_External_Rela);
5864
5865 if (htab->plt_type == PLT_VXWORKS)
5866 {
5867 /* Allocate space for the unloaded relocations. */
5868 if (!info->shared
5869 && htab->elf.dynamic_sections_created)
5870 {
5871 if (ent->plt.offset
5872 == (bfd_vma) htab->plt_initial_entry_size)
5873 {
5874 htab->srelplt2->size
5875 += (sizeof (Elf32_External_Rela)
5876 * VXWORKS_PLTRESOLVE_RELOCS);
5877 }
5878
5879 htab->srelplt2->size
5880 += (sizeof (Elf32_External_Rela)
5881 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5882 }
5883
5884 /* Every PLT entry has an associated GOT entry in
5885 .got.plt. */
5886 htab->sgotplt->size += 4;
5887 }
5888 }
5889 doneone = TRUE;
5890 }
5891 }
5892 else
5893 ent->plt.offset = (bfd_vma) -1;
5894 }
5895 else
5896 ent->plt.offset = (bfd_vma) -1;
5897
5898 if (!doneone)
5899 {
5900 h->plt.plist = NULL;
5901 h->needs_plt = 0;
5902 }
5903 }
5904 else
5905 {
5906 h->plt.plist = NULL;
5907 h->needs_plt = 0;
5908 }
5909
5910 eh = (struct ppc_elf_link_hash_entry *) h;
5911 if (eh->elf.got.refcount > 0)
5912 {
5913 bfd_boolean dyn;
5914 unsigned int need;
5915
5916 /* Make sure this symbol is output as a dynamic symbol. */
5917 if (eh->elf.dynindx == -1
5918 && !eh->elf.forced_local
5919 && eh->elf.type != STT_GNU_IFUNC
5920 && htab->elf.dynamic_sections_created)
5921 {
5922 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5923 return FALSE;
5924 }
5925
5926 need = 0;
5927 if ((eh->tls_mask & TLS_TLS) != 0)
5928 {
5929 if ((eh->tls_mask & TLS_LD) != 0)
5930 {
5931 if (!eh->elf.def_dynamic)
5932 /* We'll just use htab->tlsld_got.offset. This should
5933 always be the case. It's a little odd if we have
5934 a local dynamic reloc against a non-local symbol. */
5935 htab->tlsld_got.refcount += 1;
5936 else
5937 need += 8;
5938 }
5939 if ((eh->tls_mask & TLS_GD) != 0)
5940 need += 8;
5941 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5942 need += 4;
5943 if ((eh->tls_mask & TLS_DTPREL) != 0)
5944 need += 4;
5945 }
5946 else
5947 need += 4;
5948 if (need == 0)
5949 eh->elf.got.offset = (bfd_vma) -1;
5950 else
5951 {
5952 eh->elf.got.offset = allocate_got (htab, need);
5953 dyn = htab->elf.dynamic_sections_created;
5954 if ((info->shared
5955 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5956 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5957 || eh->elf.root.type != bfd_link_hash_undefweak))
5958 {
5959 asection *rsec = htab->relgot;
5960
5961 if (eh->elf.type == STT_GNU_IFUNC)
5962 rsec = htab->reliplt;
5963 /* All the entries we allocated need relocs.
5964 Except LD only needs one. */
5965 if ((eh->tls_mask & TLS_LD) != 0
5966 && eh->elf.def_dynamic)
5967 need -= 4;
5968 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5969 }
5970 }
5971 }
5972 else
5973 eh->elf.got.offset = (bfd_vma) -1;
5974
5975 if (eh->dyn_relocs == NULL
5976 || !htab->elf.dynamic_sections_created)
5977 return TRUE;
5978
5979 /* In the shared -Bsymbolic case, discard space allocated for
5980 dynamic pc-relative relocs against symbols which turn out to be
5981 defined in regular objects. For the normal shared case, discard
5982 space for relocs that have become local due to symbol visibility
5983 changes. */
5984
5985 if (info->shared)
5986 {
5987 /* Relocs that use pc_count are those that appear on a call insn,
5988 or certain REL relocs (see must_be_dyn_reloc) that can be
5989 generated via assembly. We want calls to protected symbols to
5990 resolve directly to the function rather than going via the plt.
5991 If people want function pointer comparisons to work as expected
5992 then they should avoid writing weird assembly. */
5993 if (SYMBOL_CALLS_LOCAL (info, h))
5994 {
5995 struct elf_dyn_relocs **pp;
5996
5997 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5998 {
5999 p->count -= p->pc_count;
6000 p->pc_count = 0;
6001 if (p->count == 0)
6002 *pp = p->next;
6003 else
6004 pp = &p->next;
6005 }
6006 }
6007
6008 if (htab->is_vxworks)
6009 {
6010 struct elf_dyn_relocs **pp;
6011
6012 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6013 {
6014 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6015 *pp = p->next;
6016 else
6017 pp = &p->next;
6018 }
6019 }
6020
6021 /* Discard relocs on undefined symbols that must be local. */
6022 if (eh->dyn_relocs != NULL
6023 && h->root.type == bfd_link_hash_undefined
6024 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6025 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6026 eh->dyn_relocs = NULL;
6027
6028 /* Also discard relocs on undefined weak syms with non-default
6029 visibility. */
6030 if (eh->dyn_relocs != NULL
6031 && h->root.type == bfd_link_hash_undefweak)
6032 {
6033 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6034 eh->dyn_relocs = NULL;
6035
6036 /* Make sure undefined weak symbols are output as a dynamic
6037 symbol in PIEs. */
6038 else if (h->dynindx == -1
6039 && !h->forced_local
6040 && !h->def_regular)
6041 {
6042 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6043 return FALSE;
6044 }
6045 }
6046 }
6047 else if (ELIMINATE_COPY_RELOCS)
6048 {
6049 /* For the non-shared case, discard space for relocs against
6050 symbols which turn out to need copy relocs or are not
6051 dynamic. */
6052
6053 if (!h->non_got_ref
6054 && !h->def_regular)
6055 {
6056 /* Make sure this symbol is output as a dynamic symbol.
6057 Undefined weak syms won't yet be marked as dynamic. */
6058 if (h->dynindx == -1
6059 && !h->forced_local)
6060 {
6061 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6062 return FALSE;
6063 }
6064
6065 /* If that succeeded, we know we'll be keeping all the
6066 relocs. */
6067 if (h->dynindx != -1)
6068 goto keep;
6069 }
6070
6071 eh->dyn_relocs = NULL;
6072
6073 keep: ;
6074 }
6075
6076 /* Finally, allocate space. */
6077 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6078 {
6079 asection *sreloc = elf_section_data (p->sec)->sreloc;
6080 if (eh->elf.type == STT_GNU_IFUNC)
6081 sreloc = htab->reliplt;
6082 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6083 }
6084
6085 return TRUE;
6086 }
6087
6088 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6089 read-only sections. */
6090
6091 static bfd_boolean
6092 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6093 {
6094 if (h->root.type == bfd_link_hash_indirect)
6095 return TRUE;
6096
6097 if (readonly_dynrelocs (h))
6098 {
6099 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6100
6101 /* Not an error, just cut short the traversal. */
6102 return FALSE;
6103 }
6104 return TRUE;
6105 }
6106
6107 static const unsigned char glink_eh_frame_cie[] =
6108 {
6109 0, 0, 0, 16, /* length. */
6110 0, 0, 0, 0, /* id. */
6111 1, /* CIE version. */
6112 'z', 'R', 0, /* Augmentation string. */
6113 4, /* Code alignment. */
6114 0x7c, /* Data alignment. */
6115 65, /* RA reg. */
6116 1, /* Augmentation size. */
6117 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6118 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6119 };
6120
6121 /* Set the sizes of the dynamic sections. */
6122
6123 static bfd_boolean
6124 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6125 struct bfd_link_info *info)
6126 {
6127 struct ppc_elf_link_hash_table *htab;
6128 asection *s;
6129 bfd_boolean relocs;
6130 bfd *ibfd;
6131
6132 #ifdef DEBUG
6133 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6134 #endif
6135
6136 htab = ppc_elf_hash_table (info);
6137 BFD_ASSERT (htab->elf.dynobj != NULL);
6138
6139 if (elf_hash_table (info)->dynamic_sections_created)
6140 {
6141 /* Set the contents of the .interp section to the interpreter. */
6142 if (info->executable)
6143 {
6144 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6145 BFD_ASSERT (s != NULL);
6146 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6147 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6148 }
6149 }
6150
6151 if (htab->plt_type == PLT_OLD)
6152 htab->got_header_size = 16;
6153 else if (htab->plt_type == PLT_NEW)
6154 htab->got_header_size = 12;
6155
6156 /* Set up .got offsets for local syms, and space for local dynamic
6157 relocs. */
6158 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6159 {
6160 bfd_signed_vma *local_got;
6161 bfd_signed_vma *end_local_got;
6162 struct plt_entry **local_plt;
6163 struct plt_entry **end_local_plt;
6164 char *lgot_masks;
6165 bfd_size_type locsymcount;
6166 Elf_Internal_Shdr *symtab_hdr;
6167
6168 if (!is_ppc_elf (ibfd))
6169 continue;
6170
6171 for (s = ibfd->sections; s != NULL; s = s->next)
6172 {
6173 struct ppc_dyn_relocs *p;
6174
6175 for (p = ((struct ppc_dyn_relocs *)
6176 elf_section_data (s)->local_dynrel);
6177 p != NULL;
6178 p = p->next)
6179 {
6180 if (!bfd_is_abs_section (p->sec)
6181 && bfd_is_abs_section (p->sec->output_section))
6182 {
6183 /* Input section has been discarded, either because
6184 it is a copy of a linkonce section or due to
6185 linker script /DISCARD/, so we'll be discarding
6186 the relocs too. */
6187 }
6188 else if (htab->is_vxworks
6189 && strcmp (p->sec->output_section->name,
6190 ".tls_vars") == 0)
6191 {
6192 /* Relocations in vxworks .tls_vars sections are
6193 handled specially by the loader. */
6194 }
6195 else if (p->count != 0)
6196 {
6197 asection *sreloc = elf_section_data (p->sec)->sreloc;
6198 if (p->ifunc)
6199 sreloc = htab->reliplt;
6200 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6201 if ((p->sec->output_section->flags
6202 & (SEC_READONLY | SEC_ALLOC))
6203 == (SEC_READONLY | SEC_ALLOC))
6204 info->flags |= DF_TEXTREL;
6205 }
6206 }
6207 }
6208
6209 local_got = elf_local_got_refcounts (ibfd);
6210 if (!local_got)
6211 continue;
6212
6213 symtab_hdr = &elf_symtab_hdr (ibfd);
6214 locsymcount = symtab_hdr->sh_info;
6215 end_local_got = local_got + locsymcount;
6216 local_plt = (struct plt_entry **) end_local_got;
6217 end_local_plt = local_plt + locsymcount;
6218 lgot_masks = (char *) end_local_plt;
6219
6220 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6221 if (*local_got > 0)
6222 {
6223 unsigned int need = 0;
6224 if ((*lgot_masks & TLS_TLS) != 0)
6225 {
6226 if ((*lgot_masks & TLS_GD) != 0)
6227 need += 8;
6228 if ((*lgot_masks & TLS_LD) != 0)
6229 htab->tlsld_got.refcount += 1;
6230 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6231 need += 4;
6232 if ((*lgot_masks & TLS_DTPREL) != 0)
6233 need += 4;
6234 }
6235 else
6236 need += 4;
6237 if (need == 0)
6238 *local_got = (bfd_vma) -1;
6239 else
6240 {
6241 *local_got = allocate_got (htab, need);
6242 if (info->shared)
6243 {
6244 asection *srel = htab->relgot;
6245 if ((*lgot_masks & PLT_IFUNC) != 0)
6246 srel = htab->reliplt;
6247 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6248 }
6249 }
6250 }
6251 else
6252 *local_got = (bfd_vma) -1;
6253
6254 if (htab->is_vxworks)
6255 continue;
6256
6257 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6258 for (; local_plt < end_local_plt; ++local_plt)
6259 {
6260 struct plt_entry *ent;
6261 bfd_boolean doneone = FALSE;
6262 bfd_vma plt_offset = 0, glink_offset = 0;
6263
6264 for (ent = *local_plt; ent != NULL; ent = ent->next)
6265 if (ent->plt.refcount > 0)
6266 {
6267 s = htab->iplt;
6268
6269 if (!doneone)
6270 {
6271 plt_offset = s->size;
6272 s->size += 4;
6273 }
6274 ent->plt.offset = plt_offset;
6275
6276 s = htab->glink;
6277 if (!doneone || info->shared)
6278 {
6279 glink_offset = s->size;
6280 s->size += GLINK_ENTRY_SIZE;
6281 }
6282 ent->glink_offset = glink_offset;
6283
6284 if (!doneone)
6285 {
6286 htab->reliplt->size += sizeof (Elf32_External_Rela);
6287 doneone = TRUE;
6288 }
6289 }
6290 else
6291 ent->plt.offset = (bfd_vma) -1;
6292 }
6293 }
6294
6295 /* Allocate space for global sym dynamic relocs. */
6296 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6297
6298 if (htab->tlsld_got.refcount > 0)
6299 {
6300 htab->tlsld_got.offset = allocate_got (htab, 8);
6301 if (info->shared)
6302 htab->relgot->size += sizeof (Elf32_External_Rela);
6303 }
6304 else
6305 htab->tlsld_got.offset = (bfd_vma) -1;
6306
6307 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6308 {
6309 unsigned int g_o_t = 32768;
6310
6311 /* If we haven't allocated the header, do so now. When we get here,
6312 for old plt/got the got size will be 0 to 32764 (not allocated),
6313 or 32780 to 65536 (header allocated). For new plt/got, the
6314 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6315 if (htab->got->size <= 32768)
6316 {
6317 g_o_t = htab->got->size;
6318 if (htab->plt_type == PLT_OLD)
6319 g_o_t += 4;
6320 htab->got->size += htab->got_header_size;
6321 }
6322
6323 htab->elf.hgot->root.u.def.value = g_o_t;
6324 }
6325 if (info->shared)
6326 {
6327 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6328
6329 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6330 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6331 }
6332 if (info->emitrelocations)
6333 {
6334 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6335
6336 if (sda != NULL && sda->ref_regular)
6337 sda->root.u.def.section->flags |= SEC_KEEP;
6338 sda = htab->sdata[1].sym;
6339 if (sda != NULL && sda->ref_regular)
6340 sda->root.u.def.section->flags |= SEC_KEEP;
6341 }
6342
6343 if (htab->glink != NULL
6344 && htab->glink->size != 0
6345 && htab->elf.dynamic_sections_created)
6346 {
6347 htab->glink_pltresolve = htab->glink->size;
6348 /* Space for the branch table. */
6349 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6350 /* Pad out to align the start of PLTresolve. */
6351 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6352 ? 63 : 15);
6353 htab->glink->size += GLINK_PLTRESOLVE;
6354
6355 if (htab->params->emit_stub_syms)
6356 {
6357 struct elf_link_hash_entry *sh;
6358 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6359 TRUE, FALSE, FALSE);
6360 if (sh == NULL)
6361 return FALSE;
6362 if (sh->root.type == bfd_link_hash_new)
6363 {
6364 sh->root.type = bfd_link_hash_defined;
6365 sh->root.u.def.section = htab->glink;
6366 sh->root.u.def.value = htab->glink_pltresolve;
6367 sh->ref_regular = 1;
6368 sh->def_regular = 1;
6369 sh->ref_regular_nonweak = 1;
6370 sh->forced_local = 1;
6371 sh->non_elf = 0;
6372 }
6373 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6374 TRUE, FALSE, FALSE);
6375 if (sh == NULL)
6376 return FALSE;
6377 if (sh->root.type == bfd_link_hash_new)
6378 {
6379 sh->root.type = bfd_link_hash_defined;
6380 sh->root.u.def.section = htab->glink;
6381 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6382 sh->ref_regular = 1;
6383 sh->def_regular = 1;
6384 sh->ref_regular_nonweak = 1;
6385 sh->forced_local = 1;
6386 sh->non_elf = 0;
6387 }
6388 }
6389 }
6390
6391 if (htab->glink != NULL
6392 && htab->glink->size != 0
6393 && htab->glink_eh_frame != NULL
6394 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6395 && _bfd_elf_eh_frame_present (info))
6396 {
6397 s = htab->glink_eh_frame;
6398 s->size = sizeof (glink_eh_frame_cie) + 20;
6399 if (info->shared)
6400 {
6401 s->size += 4;
6402 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6403 s->size += 4;
6404 }
6405 }
6406
6407 /* We've now determined the sizes of the various dynamic sections.
6408 Allocate memory for them. */
6409 relocs = FALSE;
6410 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6411 {
6412 bfd_boolean strip_section = TRUE;
6413
6414 if ((s->flags & SEC_LINKER_CREATED) == 0)
6415 continue;
6416
6417 if (s == htab->plt
6418 || s == htab->got)
6419 {
6420 /* We'd like to strip these sections if they aren't needed, but if
6421 we've exported dynamic symbols from them we must leave them.
6422 It's too late to tell BFD to get rid of the symbols. */
6423 if (htab->elf.hplt != NULL)
6424 strip_section = FALSE;
6425 /* Strip this section if we don't need it; see the
6426 comment below. */
6427 }
6428 else if (s == htab->iplt
6429 || s == htab->glink
6430 || s == htab->glink_eh_frame
6431 || s == htab->sgotplt
6432 || s == htab->sbss
6433 || s == htab->dynbss
6434 || s == htab->dynsbss)
6435 {
6436 /* Strip these too. */
6437 }
6438 else if (s == htab->sdata[0].section
6439 || s == htab->sdata[1].section)
6440 {
6441 strip_section = (s->flags & SEC_KEEP) == 0;
6442 }
6443 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6444 ".rela"))
6445 {
6446 if (s->size != 0)
6447 {
6448 /* Remember whether there are any relocation sections. */
6449 relocs = TRUE;
6450
6451 /* We use the reloc_count field as a counter if we need
6452 to copy relocs into the output file. */
6453 s->reloc_count = 0;
6454 }
6455 }
6456 else
6457 {
6458 /* It's not one of our sections, so don't allocate space. */
6459 continue;
6460 }
6461
6462 if (s->size == 0 && strip_section)
6463 {
6464 /* If we don't need this section, strip it from the
6465 output file. This is mostly to handle .rela.bss and
6466 .rela.plt. We must create both sections in
6467 create_dynamic_sections, because they must be created
6468 before the linker maps input sections to output
6469 sections. The linker does that before
6470 adjust_dynamic_symbol is called, and it is that
6471 function which decides whether anything needs to go
6472 into these sections. */
6473 s->flags |= SEC_EXCLUDE;
6474 continue;
6475 }
6476
6477 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6478 continue;
6479
6480 /* Allocate memory for the section contents. */
6481 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6482 if (s->contents == NULL)
6483 return FALSE;
6484 }
6485
6486 if (htab->elf.dynamic_sections_created)
6487 {
6488 /* Add some entries to the .dynamic section. We fill in the
6489 values later, in ppc_elf_finish_dynamic_sections, but we
6490 must add the entries now so that we get the correct size for
6491 the .dynamic section. The DT_DEBUG entry is filled in by the
6492 dynamic linker and used by the debugger. */
6493 #define add_dynamic_entry(TAG, VAL) \
6494 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6495
6496 if (info->executable)
6497 {
6498 if (!add_dynamic_entry (DT_DEBUG, 0))
6499 return FALSE;
6500 }
6501
6502 if (htab->plt != NULL && htab->plt->size != 0)
6503 {
6504 if (!add_dynamic_entry (DT_PLTGOT, 0)
6505 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6506 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6507 || !add_dynamic_entry (DT_JMPREL, 0))
6508 return FALSE;
6509 }
6510
6511 if (htab->plt_type == PLT_NEW
6512 && htab->glink != NULL
6513 && htab->glink->size != 0)
6514 {
6515 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6516 return FALSE;
6517 if (!htab->params->no_tls_get_addr_opt
6518 && htab->tls_get_addr != NULL
6519 && htab->tls_get_addr->plt.plist != NULL
6520 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6521 return FALSE;
6522 }
6523
6524 if (relocs)
6525 {
6526 if (!add_dynamic_entry (DT_RELA, 0)
6527 || !add_dynamic_entry (DT_RELASZ, 0)
6528 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6529 return FALSE;
6530 }
6531
6532 /* If any dynamic relocs apply to a read-only section, then we
6533 need a DT_TEXTREL entry. */
6534 if ((info->flags & DF_TEXTREL) == 0)
6535 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6536 info);
6537
6538 if ((info->flags & DF_TEXTREL) != 0)
6539 {
6540 if (!add_dynamic_entry (DT_TEXTREL, 0))
6541 return FALSE;
6542 }
6543 if (htab->is_vxworks
6544 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6545 return FALSE;
6546 }
6547 #undef add_dynamic_entry
6548
6549 if (htab->glink_eh_frame != NULL
6550 && htab->glink_eh_frame->contents != NULL)
6551 {
6552 unsigned char *p = htab->glink_eh_frame->contents;
6553 bfd_vma val;
6554
6555 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6556 /* CIE length (rewrite in case little-endian). */
6557 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6558 p += sizeof (glink_eh_frame_cie);
6559 /* FDE length. */
6560 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6561 bfd_put_32 (htab->elf.dynobj, val, p);
6562 p += 4;
6563 /* CIE pointer. */
6564 val = p - htab->glink_eh_frame->contents;
6565 bfd_put_32 (htab->elf.dynobj, val, p);
6566 p += 4;
6567 /* Offset to .glink. Set later. */
6568 p += 4;
6569 /* .glink size. */
6570 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6571 p += 4;
6572 /* Augmentation. */
6573 p += 1;
6574
6575 if (info->shared
6576 && htab->elf.dynamic_sections_created)
6577 {
6578 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6579 if (adv < 64)
6580 *p++ = DW_CFA_advance_loc + adv;
6581 else if (adv < 256)
6582 {
6583 *p++ = DW_CFA_advance_loc1;
6584 *p++ = adv;
6585 }
6586 else if (adv < 65536)
6587 {
6588 *p++ = DW_CFA_advance_loc2;
6589 bfd_put_16 (htab->elf.dynobj, adv, p);
6590 p += 2;
6591 }
6592 else
6593 {
6594 *p++ = DW_CFA_advance_loc4;
6595 bfd_put_32 (htab->elf.dynobj, adv, p);
6596 p += 4;
6597 }
6598 *p++ = DW_CFA_register;
6599 *p++ = 65;
6600 p++;
6601 *p++ = DW_CFA_advance_loc + 4;
6602 *p++ = DW_CFA_restore_extended;
6603 *p++ = 65;
6604 }
6605 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6606 == htab->glink_eh_frame->size);
6607 }
6608
6609 return TRUE;
6610 }
6611
6612 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6613 if it looks like nothing is using them. */
6614
6615 static void
6616 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6617 {
6618 struct elf_link_hash_entry *sda = lsect->sym;
6619
6620 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6621 {
6622 asection *s;
6623
6624 s = bfd_get_section_by_name (output_bfd, lsect->name);
6625 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6626 {
6627 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6628 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6629 {
6630 sda->def_regular = 0;
6631 /* This is somewhat magic. See elf_link_output_extsym. */
6632 sda->ref_dynamic = 1;
6633 sda->forced_local = 0;
6634 }
6635 }
6636 }
6637 }
6638
6639 void
6640 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6641 {
6642 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6643
6644 if (htab != NULL)
6645 {
6646 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6647 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6648 }
6649 }
6650
6651
6652 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6653
6654 static bfd_boolean
6655 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6656 {
6657 if (h->plt.plist != NULL
6658 && !h->def_regular
6659 && (!h->pointer_equality_needed
6660 || !h->ref_regular_nonweak))
6661 return FALSE;
6662
6663 return _bfd_elf_hash_symbol (h);
6664 }
6665 \f
6666 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6667
6668 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6669 used for some functions that are allowed to break the ABI). */
6670 static const int shared_stub_entry[] =
6671 {
6672 0x7c0802a6, /* mflr 0 */
6673 0x429f0005, /* bcl 20, 31, .Lxxx */
6674 0x7d8802a6, /* mflr 12 */
6675 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6676 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6677 0x7c0803a6, /* mtlr 0 */
6678 0x7d8903a6, /* mtctr 12 */
6679 0x4e800420, /* bctr */
6680 };
6681
6682 static const int stub_entry[] =
6683 {
6684 0x3d800000, /* lis 12,xxx@ha */
6685 0x398c0000, /* addi 12,12,xxx@l */
6686 0x7d8903a6, /* mtctr 12 */
6687 0x4e800420, /* bctr */
6688 };
6689
6690 struct ppc_elf_relax_info
6691 {
6692 unsigned int workaround_size;
6693 };
6694
6695 /* This function implements long branch trampolines, and the ppc476
6696 icache bug workaround. Any section needing trampolines or patch
6697 space for the workaround has its size extended so that we can
6698 add trampolines at the end of the section. */
6699
6700 static bfd_boolean
6701 ppc_elf_relax_section (bfd *abfd,
6702 asection *isec,
6703 struct bfd_link_info *link_info,
6704 bfd_boolean *again)
6705 {
6706 struct one_fixup
6707 {
6708 struct one_fixup *next;
6709 asection *tsec;
6710 /* Final link, can use the symbol offset. For a
6711 relocatable link we use the symbol's index. */
6712 bfd_vma toff;
6713 bfd_vma trampoff;
6714 };
6715
6716 Elf_Internal_Shdr *symtab_hdr;
6717 bfd_byte *contents = NULL;
6718 Elf_Internal_Sym *isymbuf = NULL;
6719 Elf_Internal_Rela *internal_relocs = NULL;
6720 Elf_Internal_Rela *irel, *irelend = NULL;
6721 struct one_fixup *fixups = NULL;
6722 struct ppc_elf_relax_info *relax_info = NULL;
6723 unsigned changes = 0;
6724 bfd_boolean workaround_change;
6725 struct ppc_elf_link_hash_table *htab;
6726 bfd_size_type trampbase, trampoff, newsize;
6727 asection *got2;
6728 bfd_boolean maybe_pasted;
6729
6730 *again = FALSE;
6731
6732 /* No need to do anything with non-alloc or non-code sections. */
6733 if ((isec->flags & SEC_ALLOC) == 0
6734 || (isec->flags & SEC_CODE) == 0
6735 || (isec->flags & SEC_LINKER_CREATED) != 0
6736 || isec->size < 4)
6737 return TRUE;
6738
6739 /* We cannot represent the required PIC relocs in the output, so don't
6740 do anything. The linker doesn't support mixing -shared and -r
6741 anyway. */
6742 if (link_info->relocatable && link_info->shared)
6743 return TRUE;
6744
6745 htab = ppc_elf_hash_table (link_info);
6746 if (htab == NULL)
6747 return TRUE;
6748
6749 isec->size = (isec->size + 3) & -4;
6750 if (isec->rawsize == 0)
6751 isec->rawsize = isec->size;
6752 trampbase = isec->size;
6753
6754 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6755 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6756 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6757
6758 if (htab->params->ppc476_workaround)
6759 {
6760 if (elf_section_data (isec)->sec_info == NULL)
6761 {
6762 elf_section_data (isec)->sec_info
6763 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6764 if (elf_section_data (isec)->sec_info == NULL)
6765 return FALSE;
6766 }
6767 relax_info = elf_section_data (isec)->sec_info;
6768 trampbase -= relax_info->workaround_size;
6769 }
6770
6771 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6772 || strcmp (isec->output_section->name, ".fini") == 0);
6773 /* Space for a branch around any trampolines. */
6774 trampoff = trampbase;
6775 if (maybe_pasted && trampbase == isec->rawsize)
6776 trampoff += 4;
6777
6778 symtab_hdr = &elf_symtab_hdr (abfd);
6779
6780 if (htab->params->branch_trampolines)
6781 {
6782 /* Get a copy of the native relocations. */
6783 if (isec->reloc_count != 0)
6784 {
6785 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6786 link_info->keep_memory);
6787 if (internal_relocs == NULL)
6788 goto error_return;
6789 }
6790
6791 got2 = bfd_get_section_by_name (abfd, ".got2");
6792
6793 irelend = internal_relocs + isec->reloc_count;
6794 for (irel = internal_relocs; irel < irelend; irel++)
6795 {
6796 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6797 bfd_vma toff, roff;
6798 asection *tsec;
6799 struct one_fixup *f;
6800 size_t insn_offset = 0;
6801 bfd_vma max_branch_offset, val;
6802 bfd_byte *hit_addr;
6803 unsigned long t0;
6804 struct elf_link_hash_entry *h;
6805 struct plt_entry **plist;
6806 unsigned char sym_type;
6807
6808 switch (r_type)
6809 {
6810 case R_PPC_REL24:
6811 case R_PPC_LOCAL24PC:
6812 case R_PPC_PLTREL24:
6813 max_branch_offset = 1 << 25;
6814 break;
6815
6816 case R_PPC_REL14:
6817 case R_PPC_REL14_BRTAKEN:
6818 case R_PPC_REL14_BRNTAKEN:
6819 max_branch_offset = 1 << 15;
6820 break;
6821
6822 default:
6823 continue;
6824 }
6825
6826 /* Get the value of the symbol referred to by the reloc. */
6827 h = NULL;
6828 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6829 {
6830 /* A local symbol. */
6831 Elf_Internal_Sym *isym;
6832
6833 /* Read this BFD's local symbols. */
6834 if (isymbuf == NULL)
6835 {
6836 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6837 if (isymbuf == NULL)
6838 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6839 symtab_hdr->sh_info, 0,
6840 NULL, NULL, NULL);
6841 if (isymbuf == 0)
6842 goto error_return;
6843 }
6844 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6845 if (isym->st_shndx == SHN_UNDEF)
6846 tsec = bfd_und_section_ptr;
6847 else if (isym->st_shndx == SHN_ABS)
6848 tsec = bfd_abs_section_ptr;
6849 else if (isym->st_shndx == SHN_COMMON)
6850 tsec = bfd_com_section_ptr;
6851 else
6852 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6853
6854 toff = isym->st_value;
6855 sym_type = ELF_ST_TYPE (isym->st_info);
6856 }
6857 else
6858 {
6859 /* Global symbol handling. */
6860 unsigned long indx;
6861
6862 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6863 h = elf_sym_hashes (abfd)[indx];
6864
6865 while (h->root.type == bfd_link_hash_indirect
6866 || h->root.type == bfd_link_hash_warning)
6867 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6868
6869 if (h->root.type == bfd_link_hash_defined
6870 || h->root.type == bfd_link_hash_defweak)
6871 {
6872 tsec = h->root.u.def.section;
6873 toff = h->root.u.def.value;
6874 }
6875 else if (h->root.type == bfd_link_hash_undefined
6876 || h->root.type == bfd_link_hash_undefweak)
6877 {
6878 tsec = bfd_und_section_ptr;
6879 toff = link_info->relocatable ? indx : 0;
6880 }
6881 else
6882 continue;
6883
6884 /* If this branch is to __tls_get_addr then we may later
6885 optimise away the call. We won't be needing a long-
6886 branch stub in that case. */
6887 if (link_info->executable
6888 && !link_info->relocatable
6889 && h == htab->tls_get_addr
6890 && irel != internal_relocs)
6891 {
6892 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6893 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6894 unsigned int tls_mask = 0;
6895
6896 /* The previous reloc should be one of R_PPC_TLSGD or
6897 R_PPC_TLSLD, or for older object files, a reloc
6898 on the __tls_get_addr arg setup insn. Get tls
6899 mask bits from the symbol on that reloc. */
6900 if (t_symndx < symtab_hdr->sh_info)
6901 {
6902 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6903
6904 if (local_got_offsets != NULL)
6905 {
6906 struct plt_entry **local_plt = (struct plt_entry **)
6907 (local_got_offsets + symtab_hdr->sh_info);
6908 char *lgot_masks = (char *)
6909 (local_plt + symtab_hdr->sh_info);
6910 tls_mask = lgot_masks[t_symndx];
6911 }
6912 }
6913 else
6914 {
6915 struct elf_link_hash_entry *th
6916 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6917
6918 while (th->root.type == bfd_link_hash_indirect
6919 || th->root.type == bfd_link_hash_warning)
6920 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6921
6922 tls_mask
6923 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6924 }
6925
6926 /* The mask bits tell us if the call will be
6927 optimised away. */
6928 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6929 && (t_rtype == R_PPC_TLSGD
6930 || t_rtype == R_PPC_GOT_TLSGD16
6931 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6932 continue;
6933 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6934 && (t_rtype == R_PPC_TLSLD
6935 || t_rtype == R_PPC_GOT_TLSLD16
6936 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6937 continue;
6938 }
6939
6940 sym_type = h->type;
6941 }
6942
6943 /* The condition here under which we call find_plt_ent must
6944 match that in relocate_section. If we call find_plt_ent here
6945 but not in relocate_section, or vice versa, then the branch
6946 destination used here may be incorrect. */
6947 plist = NULL;
6948 if (h != NULL)
6949 {
6950 /* We know is_branch_reloc (r_type) is true. */
6951 if (h->type == STT_GNU_IFUNC
6952 || r_type == R_PPC_PLTREL24)
6953 plist = &h->plt.plist;
6954 }
6955 else if (sym_type == STT_GNU_IFUNC
6956 && elf_local_got_offsets (abfd) != NULL)
6957 {
6958 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6959 struct plt_entry **local_plt = (struct plt_entry **)
6960 (local_got_offsets + symtab_hdr->sh_info);
6961 plist = local_plt + ELF32_R_SYM (irel->r_info);
6962 }
6963 if (plist != NULL)
6964 {
6965 bfd_vma addend = 0;
6966 struct plt_entry *ent;
6967
6968 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6969 addend = irel->r_addend;
6970 ent = find_plt_ent (plist, got2, addend);
6971 if (ent != NULL)
6972 {
6973 if (htab->plt_type == PLT_NEW
6974 || h == NULL
6975 || !htab->elf.dynamic_sections_created
6976 || h->dynindx == -1)
6977 {
6978 tsec = htab->glink;
6979 toff = ent->glink_offset;
6980 }
6981 else
6982 {
6983 tsec = htab->plt;
6984 toff = ent->plt.offset;
6985 }
6986 }
6987 }
6988
6989 /* If the branch and target are in the same section, you have
6990 no hope of adding stubs. We'll error out later should the
6991 branch overflow. */
6992 if (tsec == isec)
6993 continue;
6994
6995 /* There probably isn't any reason to handle symbols in
6996 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6997 attribute for a code section, and we are only looking at
6998 branches. However, implement it correctly here as a
6999 reference for other target relax_section functions. */
7000 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7001 {
7002 /* At this stage in linking, no SEC_MERGE symbol has been
7003 adjusted, so all references to such symbols need to be
7004 passed through _bfd_merged_section_offset. (Later, in
7005 relocate_section, all SEC_MERGE symbols *except* for
7006 section symbols have been adjusted.)
7007
7008 gas may reduce relocations against symbols in SEC_MERGE
7009 sections to a relocation against the section symbol when
7010 the original addend was zero. When the reloc is against
7011 a section symbol we should include the addend in the
7012 offset passed to _bfd_merged_section_offset, since the
7013 location of interest is the original symbol. On the
7014 other hand, an access to "sym+addend" where "sym" is not
7015 a section symbol should not include the addend; Such an
7016 access is presumed to be an offset from "sym"; The
7017 location of interest is just "sym". */
7018 if (sym_type == STT_SECTION)
7019 toff += irel->r_addend;
7020
7021 toff
7022 = _bfd_merged_section_offset (abfd, &tsec,
7023 elf_section_data (tsec)->sec_info,
7024 toff);
7025
7026 if (sym_type != STT_SECTION)
7027 toff += irel->r_addend;
7028 }
7029 /* PLTREL24 addends are special. */
7030 else if (r_type != R_PPC_PLTREL24)
7031 toff += irel->r_addend;
7032
7033 /* Attempted -shared link of non-pic code loses. */
7034 if ((!link_info->relocatable
7035 && tsec == bfd_und_section_ptr)
7036 || tsec->output_section == NULL
7037 || (tsec->owner != NULL
7038 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7039 continue;
7040
7041 roff = irel->r_offset;
7042
7043 /* If the branch is in range, no need to do anything. */
7044 if (tsec != bfd_und_section_ptr
7045 && (!link_info->relocatable
7046 /* A relocatable link may have sections moved during
7047 final link, so do not presume they remain in range. */
7048 || tsec->output_section == isec->output_section))
7049 {
7050 bfd_vma symaddr, reladdr;
7051
7052 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7053 reladdr = isec->output_section->vma + isec->output_offset + roff;
7054 if (symaddr - reladdr + max_branch_offset
7055 < 2 * max_branch_offset)
7056 continue;
7057 }
7058
7059 /* Look for an existing fixup to this address. */
7060 for (f = fixups; f ; f = f->next)
7061 if (f->tsec == tsec && f->toff == toff)
7062 break;
7063
7064 if (f == NULL)
7065 {
7066 size_t size;
7067 unsigned long stub_rtype;
7068
7069 val = trampoff - roff;
7070 if (val >= max_branch_offset)
7071 /* Oh dear, we can't reach a trampoline. Don't try to add
7072 one. We'll report an error later. */
7073 continue;
7074
7075 if (link_info->shared)
7076 {
7077 size = 4 * ARRAY_SIZE (shared_stub_entry);
7078 insn_offset = 12;
7079 }
7080 else
7081 {
7082 size = 4 * ARRAY_SIZE (stub_entry);
7083 insn_offset = 0;
7084 }
7085 stub_rtype = R_PPC_RELAX;
7086 if (tsec == htab->plt
7087 || tsec == htab->glink)
7088 {
7089 stub_rtype = R_PPC_RELAX_PLT;
7090 if (r_type == R_PPC_PLTREL24)
7091 stub_rtype = R_PPC_RELAX_PLTREL24;
7092 }
7093
7094 /* Hijack the old relocation. Since we need two
7095 relocations for this use a "composite" reloc. */
7096 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7097 stub_rtype);
7098 irel->r_offset = trampoff + insn_offset;
7099 if (r_type == R_PPC_PLTREL24
7100 && stub_rtype != R_PPC_RELAX_PLTREL24)
7101 irel->r_addend = 0;
7102
7103 /* Record the fixup so we don't do it again this section. */
7104 f = bfd_malloc (sizeof (*f));
7105 f->next = fixups;
7106 f->tsec = tsec;
7107 f->toff = toff;
7108 f->trampoff = trampoff;
7109 fixups = f;
7110
7111 trampoff += size;
7112 changes++;
7113 }
7114 else
7115 {
7116 val = f->trampoff - roff;
7117 if (val >= max_branch_offset)
7118 continue;
7119
7120 /* Nop out the reloc, since we're finalizing things here. */
7121 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7122 }
7123
7124 /* Get the section contents. */
7125 if (contents == NULL)
7126 {
7127 /* Get cached copy if it exists. */
7128 if (elf_section_data (isec)->this_hdr.contents != NULL)
7129 contents = elf_section_data (isec)->this_hdr.contents;
7130 /* Go get them off disk. */
7131 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7132 goto error_return;
7133 }
7134
7135 /* Fix up the existing branch to hit the trampoline. */
7136 hit_addr = contents + roff;
7137 switch (r_type)
7138 {
7139 case R_PPC_REL24:
7140 case R_PPC_LOCAL24PC:
7141 case R_PPC_PLTREL24:
7142 t0 = bfd_get_32 (abfd, hit_addr);
7143 t0 &= ~0x3fffffc;
7144 t0 |= val & 0x3fffffc;
7145 bfd_put_32 (abfd, t0, hit_addr);
7146 break;
7147
7148 case R_PPC_REL14:
7149 case R_PPC_REL14_BRTAKEN:
7150 case R_PPC_REL14_BRNTAKEN:
7151 t0 = bfd_get_32 (abfd, hit_addr);
7152 t0 &= ~0xfffc;
7153 t0 |= val & 0xfffc;
7154 bfd_put_32 (abfd, t0, hit_addr);
7155 break;
7156 }
7157 }
7158
7159 while (fixups != NULL)
7160 {
7161 struct one_fixup *f = fixups;
7162 fixups = fixups->next;
7163 free (f);
7164 }
7165 }
7166
7167 workaround_change = FALSE;
7168 newsize = trampoff;
7169 if (htab->params->ppc476_workaround
7170 && (!link_info->relocatable
7171 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7172 {
7173 bfd_vma addr, end_addr;
7174 unsigned int crossings;
7175 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7176
7177 addr = isec->output_section->vma + isec->output_offset;
7178 end_addr = addr + trampoff;
7179 addr &= -pagesize;
7180 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7181 if (crossings != 0)
7182 {
7183 /* Keep space aligned, to ensure the patch code itself does
7184 not cross a page. Don't decrease size calculated on a
7185 previous pass as otherwise we might never settle on a layout. */
7186 newsize = 15 - ((end_addr - 1) & 15);
7187 newsize += crossings * 16;
7188 if (relax_info->workaround_size < newsize)
7189 {
7190 relax_info->workaround_size = newsize;
7191 workaround_change = TRUE;
7192 }
7193 /* Ensure relocate_section is called. */
7194 isec->flags |= SEC_RELOC;
7195 }
7196 newsize = trampoff + relax_info->workaround_size;
7197 }
7198
7199 if (changes || workaround_change)
7200 isec->size = newsize;
7201
7202 if (isymbuf != NULL
7203 && symtab_hdr->contents != (unsigned char *) isymbuf)
7204 {
7205 if (! link_info->keep_memory)
7206 free (isymbuf);
7207 else
7208 {
7209 /* Cache the symbols for elf_link_input_bfd. */
7210 symtab_hdr->contents = (unsigned char *) isymbuf;
7211 }
7212 }
7213
7214 if (contents != NULL
7215 && elf_section_data (isec)->this_hdr.contents != contents)
7216 {
7217 if (!changes && !link_info->keep_memory)
7218 free (contents);
7219 else
7220 {
7221 /* Cache the section contents for elf_link_input_bfd. */
7222 elf_section_data (isec)->this_hdr.contents = contents;
7223 }
7224 }
7225
7226 if (changes != 0)
7227 {
7228 /* Append sufficient NOP relocs so we can write out relocation
7229 information for the trampolines. */
7230 Elf_Internal_Shdr *rel_hdr;
7231 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7232 * sizeof (*new_relocs));
7233 unsigned ix;
7234
7235 if (!new_relocs)
7236 goto error_return;
7237 memcpy (new_relocs, internal_relocs,
7238 isec->reloc_count * sizeof (*new_relocs));
7239 for (ix = changes; ix--;)
7240 {
7241 irel = new_relocs + ix + isec->reloc_count;
7242
7243 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7244 }
7245 if (internal_relocs != elf_section_data (isec)->relocs)
7246 free (internal_relocs);
7247 elf_section_data (isec)->relocs = new_relocs;
7248 isec->reloc_count += changes;
7249 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7250 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7251 }
7252 else if (internal_relocs != NULL
7253 && elf_section_data (isec)->relocs != internal_relocs)
7254 free (internal_relocs);
7255
7256 *again = changes != 0 || workaround_change;
7257 return TRUE;
7258
7259 error_return:
7260 while (fixups != NULL)
7261 {
7262 struct one_fixup *f = fixups;
7263 fixups = fixups->next;
7264 free (f);
7265 }
7266 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7267 free (isymbuf);
7268 if (contents != NULL
7269 && elf_section_data (isec)->this_hdr.contents != contents)
7270 free (contents);
7271 if (internal_relocs != NULL
7272 && elf_section_data (isec)->relocs != internal_relocs)
7273 free (internal_relocs);
7274 return FALSE;
7275 }
7276 \f
7277 /* What to do when ld finds relocations against symbols defined in
7278 discarded sections. */
7279
7280 static unsigned int
7281 ppc_elf_action_discarded (asection *sec)
7282 {
7283 if (strcmp (".fixup", sec->name) == 0)
7284 return 0;
7285
7286 if (strcmp (".got2", sec->name) == 0)
7287 return 0;
7288
7289 return _bfd_elf_default_action_discarded (sec);
7290 }
7291 \f
7292 /* Fill in the address for a pointer generated in a linker section. */
7293
7294 static bfd_vma
7295 elf_finish_pointer_linker_section (bfd *input_bfd,
7296 elf_linker_section_t *lsect,
7297 struct elf_link_hash_entry *h,
7298 bfd_vma relocation,
7299 const Elf_Internal_Rela *rel)
7300 {
7301 elf_linker_section_pointers_t *linker_section_ptr;
7302
7303 BFD_ASSERT (lsect != NULL);
7304
7305 if (h != NULL)
7306 {
7307 /* Handle global symbol. */
7308 struct ppc_elf_link_hash_entry *eh;
7309
7310 eh = (struct ppc_elf_link_hash_entry *) h;
7311 BFD_ASSERT (eh->elf.def_regular);
7312 linker_section_ptr = eh->linker_section_pointer;
7313 }
7314 else
7315 {
7316 /* Handle local symbol. */
7317 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7318
7319 BFD_ASSERT (is_ppc_elf (input_bfd));
7320 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7321 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7322 }
7323
7324 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7325 rel->r_addend,
7326 lsect);
7327 BFD_ASSERT (linker_section_ptr != NULL);
7328
7329 /* Offset will always be a multiple of four, so use the bottom bit
7330 as a "written" flag. */
7331 if ((linker_section_ptr->offset & 1) == 0)
7332 {
7333 bfd_put_32 (lsect->section->owner,
7334 relocation + linker_section_ptr->addend,
7335 lsect->section->contents + linker_section_ptr->offset);
7336 linker_section_ptr->offset += 1;
7337 }
7338
7339 relocation = (lsect->section->output_section->vma
7340 + lsect->section->output_offset
7341 + linker_section_ptr->offset - 1
7342 - SYM_VAL (lsect->sym));
7343
7344 #ifdef DEBUG
7345 fprintf (stderr,
7346 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7347 lsect->name, (long) relocation, (long) relocation);
7348 #endif
7349
7350 return relocation;
7351 }
7352
7353 #define PPC_LO(v) ((v) & 0xffff)
7354 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7355 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7356
7357 static void
7358 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7359 struct bfd_link_info *info)
7360 {
7361 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7362 bfd *output_bfd = info->output_bfd;
7363 bfd_vma plt;
7364
7365 plt = ((ent->plt.offset & ~1)
7366 + plt_sec->output_section->vma
7367 + plt_sec->output_offset);
7368
7369 if (info->shared)
7370 {
7371 bfd_vma got = 0;
7372
7373 if (ent->addend >= 32768)
7374 got = (ent->addend
7375 + ent->sec->output_section->vma
7376 + ent->sec->output_offset);
7377 else if (htab->elf.hgot != NULL)
7378 got = SYM_VAL (htab->elf.hgot);
7379
7380 plt -= got;
7381
7382 if (plt + 0x8000 < 0x10000)
7383 {
7384 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7385 p += 4;
7386 bfd_put_32 (output_bfd, MTCTR_11, p);
7387 p += 4;
7388 bfd_put_32 (output_bfd, BCTR, p);
7389 p += 4;
7390 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7391 p += 4;
7392 }
7393 else
7394 {
7395 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7396 p += 4;
7397 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7398 p += 4;
7399 bfd_put_32 (output_bfd, MTCTR_11, p);
7400 p += 4;
7401 bfd_put_32 (output_bfd, BCTR, p);
7402 p += 4;
7403 }
7404 }
7405 else
7406 {
7407 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7408 p += 4;
7409 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7410 p += 4;
7411 bfd_put_32 (output_bfd, MTCTR_11, p);
7412 p += 4;
7413 bfd_put_32 (output_bfd, BCTR, p);
7414 p += 4;
7415 }
7416 }
7417
7418 /* Return true if symbol is defined statically. */
7419
7420 static bfd_boolean
7421 is_static_defined (struct elf_link_hash_entry *h)
7422 {
7423 return ((h->root.type == bfd_link_hash_defined
7424 || h->root.type == bfd_link_hash_defweak)
7425 && h->root.u.def.section != NULL
7426 && h->root.u.def.section->output_section != NULL);
7427 }
7428
7429 /* If INSN is an opcode that may be used with an @tls operand, return
7430 the transformed insn for TLS optimisation, otherwise return 0. If
7431 REG is non-zero only match an insn with RB or RA equal to REG. */
7432
7433 unsigned int
7434 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7435 {
7436 unsigned int rtra;
7437
7438 if ((insn & (0x3f << 26)) != 31 << 26)
7439 return 0;
7440
7441 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7442 rtra = insn & ((1 << 26) - (1 << 16));
7443 else if (((insn >> 16) & 0x1f) == reg)
7444 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7445 else
7446 return 0;
7447
7448 if ((insn & (0x3ff << 1)) == 266 << 1)
7449 /* add -> addi. */
7450 insn = 14 << 26;
7451 else if ((insn & (0x1f << 1)) == 23 << 1
7452 && ((insn & (0x1f << 6)) < 14 << 6
7453 || ((insn & (0x1f << 6)) >= 16 << 6
7454 && (insn & (0x1f << 6)) < 24 << 6)))
7455 /* load and store indexed -> dform. */
7456 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7457 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7458 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7459 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7460 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7461 /* lwax -> lwa. */
7462 insn = (58 << 26) | 2;
7463 else
7464 return 0;
7465 insn |= rtra;
7466 return insn;
7467 }
7468
7469 /* If INSN is an opcode that may be used with an @tprel operand, return
7470 the transformed insn for an undefined weak symbol, ie. with the
7471 thread pointer REG operand removed. Otherwise return 0. */
7472
7473 unsigned int
7474 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7475 {
7476 if ((insn & (0x1f << 16)) == reg << 16
7477 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7478 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7479 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7480 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7481 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7482 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7483 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7484 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7485 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7486 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7487 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7488 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7489 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7490 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7491 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7492 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7493 && (insn & 3) != 1)
7494 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7495 && ((insn & 3) == 0 || (insn & 3) == 3))))
7496 {
7497 insn &= ~(0x1f << 16);
7498 }
7499 else if ((insn & (0x1f << 21)) == reg << 21
7500 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7501 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7502 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7503 {
7504 insn &= ~(0x1f << 21);
7505 insn |= (insn & (0x1f << 16)) << 5;
7506 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7507 insn -= 2 >> 26; /* convert to ori,oris */
7508 }
7509 else
7510 insn = 0;
7511 return insn;
7512 }
7513
7514 static bfd_boolean
7515 is_insn_ds_form (unsigned int insn)
7516 {
7517 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7518 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7519 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7520 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7521 }
7522
7523 static bfd_boolean
7524 is_insn_dq_form (unsigned int insn)
7525 {
7526 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7527 }
7528
7529 /* The RELOCATE_SECTION function is called by the ELF backend linker
7530 to handle the relocations for a section.
7531
7532 The relocs are always passed as Rela structures; if the section
7533 actually uses Rel structures, the r_addend field will always be
7534 zero.
7535
7536 This function is responsible for adjust the section contents as
7537 necessary, and (if using Rela relocs and generating a
7538 relocatable output file) adjusting the reloc addend as
7539 necessary.
7540
7541 This function does not have to worry about setting the reloc
7542 address or the reloc symbol index.
7543
7544 LOCAL_SYMS is a pointer to the swapped in local symbols.
7545
7546 LOCAL_SECTIONS is an array giving the section in the input file
7547 corresponding to the st_shndx field of each local symbol.
7548
7549 The global hash table entry for the global symbols can be found
7550 via elf_sym_hashes (input_bfd).
7551
7552 When generating relocatable output, this function must handle
7553 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7554 going to be the section symbol corresponding to the output
7555 section, which means that the addend must be adjusted
7556 accordingly. */
7557
7558 static bfd_boolean
7559 ppc_elf_relocate_section (bfd *output_bfd,
7560 struct bfd_link_info *info,
7561 bfd *input_bfd,
7562 asection *input_section,
7563 bfd_byte *contents,
7564 Elf_Internal_Rela *relocs,
7565 Elf_Internal_Sym *local_syms,
7566 asection **local_sections)
7567 {
7568 Elf_Internal_Shdr *symtab_hdr;
7569 struct elf_link_hash_entry **sym_hashes;
7570 struct ppc_elf_link_hash_table *htab;
7571 Elf_Internal_Rela *rel;
7572 Elf_Internal_Rela *relend;
7573 Elf_Internal_Rela outrel;
7574 asection *got2;
7575 bfd_vma *local_got_offsets;
7576 bfd_boolean ret = TRUE;
7577 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7578 bfd_boolean is_vxworks_tls;
7579
7580 #ifdef DEBUG
7581 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7582 "%ld relocations%s",
7583 input_bfd, input_section,
7584 (long) input_section->reloc_count,
7585 (info->relocatable) ? " (relocatable)" : "");
7586 #endif
7587
7588 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7589
7590 /* Initialize howto table if not already done. */
7591 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7592 ppc_elf_howto_init ();
7593
7594 htab = ppc_elf_hash_table (info);
7595 local_got_offsets = elf_local_got_offsets (input_bfd);
7596 symtab_hdr = &elf_symtab_hdr (input_bfd);
7597 sym_hashes = elf_sym_hashes (input_bfd);
7598 /* We have to handle relocations in vxworks .tls_vars sections
7599 specially, because the dynamic loader is 'weird'. */
7600 is_vxworks_tls = (htab->is_vxworks && info->shared
7601 && !strcmp (input_section->output_section->name,
7602 ".tls_vars"));
7603 rel = relocs;
7604 relend = relocs + input_section->reloc_count;
7605 for (; rel < relend; rel++)
7606 {
7607 enum elf_ppc_reloc_type r_type;
7608 bfd_vma addend;
7609 bfd_reloc_status_type r;
7610 Elf_Internal_Sym *sym;
7611 asection *sec;
7612 struct elf_link_hash_entry *h;
7613 const char *sym_name;
7614 reloc_howto_type *howto;
7615 unsigned long r_symndx;
7616 bfd_vma relocation;
7617 bfd_vma branch_bit, from;
7618 bfd_boolean unresolved_reloc;
7619 bfd_boolean warned;
7620 unsigned int tls_type, tls_mask, tls_gd;
7621 struct plt_entry **ifunc;
7622 struct reloc_howto_struct alt_howto;
7623
7624 r_type = ELF32_R_TYPE (rel->r_info);
7625 sym = NULL;
7626 sec = NULL;
7627 h = NULL;
7628 unresolved_reloc = FALSE;
7629 warned = FALSE;
7630 r_symndx = ELF32_R_SYM (rel->r_info);
7631
7632 if (r_symndx < symtab_hdr->sh_info)
7633 {
7634 sym = local_syms + r_symndx;
7635 sec = local_sections[r_symndx];
7636 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7637
7638 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7639 }
7640 else
7641 {
7642 bfd_boolean ignored;
7643
7644 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7645 r_symndx, symtab_hdr, sym_hashes,
7646 h, sec, relocation,
7647 unresolved_reloc, warned, ignored);
7648
7649 sym_name = h->root.root.string;
7650 }
7651
7652 if (sec != NULL && discarded_section (sec))
7653 {
7654 /* For relocs against symbols from removed linkonce sections,
7655 or sections discarded by a linker script, we just want the
7656 section contents zeroed. Avoid any special processing. */
7657 howto = NULL;
7658 if (r_type < R_PPC_max)
7659 howto = ppc_elf_howto_table[r_type];
7660 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7661 rel, 1, relend, howto, 0, contents);
7662 }
7663
7664 if (info->relocatable)
7665 {
7666 if (got2 != NULL
7667 && r_type == R_PPC_PLTREL24
7668 && rel->r_addend != 0)
7669 {
7670 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7671 addend specifies the GOT pointer offset within .got2. */
7672 rel->r_addend += got2->output_offset;
7673 }
7674 if (r_type != R_PPC_RELAX_PLT
7675 && r_type != R_PPC_RELAX_PLTREL24
7676 && r_type != R_PPC_RELAX)
7677 continue;
7678 }
7679
7680 /* TLS optimizations. Replace instruction sequences and relocs
7681 based on information we collected in tls_optimize. We edit
7682 RELOCS so that --emit-relocs will output something sensible
7683 for the final instruction stream. */
7684 tls_mask = 0;
7685 tls_gd = 0;
7686 if (h != NULL)
7687 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7688 else if (local_got_offsets != NULL)
7689 {
7690 struct plt_entry **local_plt;
7691 char *lgot_masks;
7692 local_plt
7693 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7694 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7695 tls_mask = lgot_masks[r_symndx];
7696 }
7697
7698 /* Ensure reloc mapping code below stays sane. */
7699 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7700 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7701 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7702 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7703 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7704 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7705 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7706 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7707 abort ();
7708 switch (r_type)
7709 {
7710 default:
7711 break;
7712
7713 case R_PPC_GOT_TPREL16:
7714 case R_PPC_GOT_TPREL16_LO:
7715 if ((tls_mask & TLS_TLS) != 0
7716 && (tls_mask & TLS_TPREL) == 0)
7717 {
7718 bfd_vma insn;
7719
7720 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7721 insn &= 31 << 21;
7722 insn |= 0x3c020000; /* addis 0,2,0 */
7723 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7724 r_type = R_PPC_TPREL16_HA;
7725 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7726 }
7727 break;
7728
7729 case R_PPC_TLS:
7730 if ((tls_mask & TLS_TLS) != 0
7731 && (tls_mask & TLS_TPREL) == 0)
7732 {
7733 bfd_vma insn;
7734
7735 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7736 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7737 if (insn == 0)
7738 abort ();
7739 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7740 r_type = R_PPC_TPREL16_LO;
7741 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7742
7743 /* Was PPC_TLS which sits on insn boundary, now
7744 PPC_TPREL16_LO which is at low-order half-word. */
7745 rel->r_offset += d_offset;
7746 }
7747 break;
7748
7749 case R_PPC_GOT_TLSGD16_HI:
7750 case R_PPC_GOT_TLSGD16_HA:
7751 tls_gd = TLS_TPRELGD;
7752 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7753 goto tls_gdld_hi;
7754 break;
7755
7756 case R_PPC_GOT_TLSLD16_HI:
7757 case R_PPC_GOT_TLSLD16_HA:
7758 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7759 {
7760 tls_gdld_hi:
7761 if ((tls_mask & tls_gd) != 0)
7762 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7763 + R_PPC_GOT_TPREL16);
7764 else
7765 {
7766 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7767 rel->r_offset -= d_offset;
7768 r_type = R_PPC_NONE;
7769 }
7770 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7771 }
7772 break;
7773
7774 case R_PPC_GOT_TLSGD16:
7775 case R_PPC_GOT_TLSGD16_LO:
7776 tls_gd = TLS_TPRELGD;
7777 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7778 goto tls_ldgd_opt;
7779 break;
7780
7781 case R_PPC_GOT_TLSLD16:
7782 case R_PPC_GOT_TLSLD16_LO:
7783 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7784 {
7785 unsigned int insn1, insn2;
7786 bfd_vma offset;
7787
7788 tls_ldgd_opt:
7789 offset = (bfd_vma) -1;
7790 /* If not using the newer R_PPC_TLSGD/LD to mark
7791 __tls_get_addr calls, we must trust that the call
7792 stays with its arg setup insns, ie. that the next
7793 reloc is the __tls_get_addr call associated with
7794 the current reloc. Edit both insns. */
7795 if (input_section->has_tls_get_addr_call
7796 && rel + 1 < relend
7797 && branch_reloc_hash_match (input_bfd, rel + 1,
7798 htab->tls_get_addr))
7799 offset = rel[1].r_offset;
7800 if ((tls_mask & tls_gd) != 0)
7801 {
7802 /* IE */
7803 insn1 = bfd_get_32 (output_bfd,
7804 contents + rel->r_offset - d_offset);
7805 insn1 &= (1 << 26) - 1;
7806 insn1 |= 32 << 26; /* lwz */
7807 if (offset != (bfd_vma) -1)
7808 {
7809 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7810 insn2 = 0x7c631214; /* add 3,3,2 */
7811 bfd_put_32 (output_bfd, insn2, contents + offset);
7812 }
7813 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7814 + R_PPC_GOT_TPREL16);
7815 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7816 }
7817 else
7818 {
7819 /* LE */
7820 insn1 = 0x3c620000; /* addis 3,2,0 */
7821 if (tls_gd == 0)
7822 {
7823 /* Was an LD reloc. */
7824 for (r_symndx = 0;
7825 r_symndx < symtab_hdr->sh_info;
7826 r_symndx++)
7827 if (local_sections[r_symndx] == sec)
7828 break;
7829 if (r_symndx >= symtab_hdr->sh_info)
7830 r_symndx = STN_UNDEF;
7831 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7832 if (r_symndx != STN_UNDEF)
7833 rel->r_addend -= (local_syms[r_symndx].st_value
7834 + sec->output_offset
7835 + sec->output_section->vma);
7836 }
7837 r_type = R_PPC_TPREL16_HA;
7838 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7839 if (offset != (bfd_vma) -1)
7840 {
7841 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7842 rel[1].r_offset = offset + d_offset;
7843 rel[1].r_addend = rel->r_addend;
7844 insn2 = 0x38630000; /* addi 3,3,0 */
7845 bfd_put_32 (output_bfd, insn2, contents + offset);
7846 }
7847 }
7848 bfd_put_32 (output_bfd, insn1,
7849 contents + rel->r_offset - d_offset);
7850 if (tls_gd == 0)
7851 {
7852 /* We changed the symbol on an LD reloc. Start over
7853 in order to get h, sym, sec etc. right. */
7854 rel--;
7855 continue;
7856 }
7857 }
7858 break;
7859
7860 case R_PPC_TLSGD:
7861 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7862 {
7863 unsigned int insn2;
7864 bfd_vma offset = rel->r_offset;
7865
7866 if ((tls_mask & TLS_TPRELGD) != 0)
7867 {
7868 /* IE */
7869 r_type = R_PPC_NONE;
7870 insn2 = 0x7c631214; /* add 3,3,2 */
7871 }
7872 else
7873 {
7874 /* LE */
7875 r_type = R_PPC_TPREL16_LO;
7876 rel->r_offset += d_offset;
7877 insn2 = 0x38630000; /* addi 3,3,0 */
7878 }
7879 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7880 bfd_put_32 (output_bfd, insn2, contents + offset);
7881 /* Zap the reloc on the _tls_get_addr call too. */
7882 BFD_ASSERT (offset == rel[1].r_offset);
7883 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7884 }
7885 break;
7886
7887 case R_PPC_TLSLD:
7888 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7889 {
7890 unsigned int insn2;
7891
7892 for (r_symndx = 0;
7893 r_symndx < symtab_hdr->sh_info;
7894 r_symndx++)
7895 if (local_sections[r_symndx] == sec)
7896 break;
7897 if (r_symndx >= symtab_hdr->sh_info)
7898 r_symndx = STN_UNDEF;
7899 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7900 if (r_symndx != STN_UNDEF)
7901 rel->r_addend -= (local_syms[r_symndx].st_value
7902 + sec->output_offset
7903 + sec->output_section->vma);
7904
7905 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7906 rel->r_offset += d_offset;
7907 insn2 = 0x38630000; /* addi 3,3,0 */
7908 bfd_put_32 (output_bfd, insn2,
7909 contents + rel->r_offset - d_offset);
7910 /* Zap the reloc on the _tls_get_addr call too. */
7911 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7912 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7913 rel--;
7914 continue;
7915 }
7916 break;
7917 }
7918
7919 /* Handle other relocations that tweak non-addend part of insn. */
7920 branch_bit = 0;
7921 switch (r_type)
7922 {
7923 default:
7924 break;
7925
7926 /* Branch taken prediction relocations. */
7927 case R_PPC_ADDR14_BRTAKEN:
7928 case R_PPC_REL14_BRTAKEN:
7929 branch_bit = BRANCH_PREDICT_BIT;
7930 /* Fall thru */
7931
7932 /* Branch not taken prediction relocations. */
7933 case R_PPC_ADDR14_BRNTAKEN:
7934 case R_PPC_REL14_BRNTAKEN:
7935 {
7936 bfd_vma insn;
7937
7938 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7939 insn &= ~BRANCH_PREDICT_BIT;
7940 insn |= branch_bit;
7941
7942 from = (rel->r_offset
7943 + input_section->output_offset
7944 + input_section->output_section->vma);
7945
7946 /* Invert 'y' bit if not the default. */
7947 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7948 insn ^= BRANCH_PREDICT_BIT;
7949
7950 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7951 break;
7952 }
7953 }
7954
7955 ifunc = NULL;
7956 if (!htab->is_vxworks)
7957 {
7958 struct plt_entry *ent;
7959
7960 if (h != NULL)
7961 {
7962 if (h->type == STT_GNU_IFUNC)
7963 ifunc = &h->plt.plist;
7964 }
7965 else if (local_got_offsets != NULL
7966 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7967 {
7968 struct plt_entry **local_plt;
7969
7970 local_plt = (struct plt_entry **) (local_got_offsets
7971 + symtab_hdr->sh_info);
7972 ifunc = local_plt + r_symndx;
7973 }
7974
7975 ent = NULL;
7976 if (ifunc != NULL
7977 && (!info->shared
7978 || is_branch_reloc (r_type)))
7979 {
7980 addend = 0;
7981 if (r_type == R_PPC_PLTREL24 && info->shared)
7982 addend = rel->r_addend;
7983 ent = find_plt_ent (ifunc, got2, addend);
7984 }
7985 if (ent != NULL)
7986 {
7987 if (h == NULL && (ent->plt.offset & 1) == 0)
7988 {
7989 Elf_Internal_Rela rela;
7990 bfd_byte *loc;
7991
7992 rela.r_offset = (htab->iplt->output_section->vma
7993 + htab->iplt->output_offset
7994 + ent->plt.offset);
7995 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7996 rela.r_addend = relocation;
7997 loc = htab->reliplt->contents;
7998 loc += (htab->reliplt->reloc_count++
7999 * sizeof (Elf32_External_Rela));
8000 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8001
8002 ent->plt.offset |= 1;
8003 }
8004 if (h == NULL && (ent->glink_offset & 1) == 0)
8005 {
8006 unsigned char *p = ((unsigned char *) htab->glink->contents
8007 + ent->glink_offset);
8008 write_glink_stub (ent, htab->iplt, p, info);
8009 ent->glink_offset |= 1;
8010 }
8011
8012 unresolved_reloc = FALSE;
8013 if (htab->plt_type == PLT_NEW
8014 || !htab->elf.dynamic_sections_created
8015 || h == NULL
8016 || h->dynindx == -1)
8017 relocation = (htab->glink->output_section->vma
8018 + htab->glink->output_offset
8019 + (ent->glink_offset & ~1));
8020 else
8021 relocation = (htab->plt->output_section->vma
8022 + htab->plt->output_offset
8023 + ent->plt.offset);
8024 }
8025 }
8026
8027 addend = rel->r_addend;
8028 tls_type = 0;
8029 howto = NULL;
8030 if (r_type < R_PPC_max)
8031 howto = ppc_elf_howto_table[r_type];
8032 switch (r_type)
8033 {
8034 default:
8035 info->callbacks->einfo
8036 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8037 input_bfd, (int) r_type, sym_name);
8038
8039 bfd_set_error (bfd_error_bad_value);
8040 ret = FALSE;
8041 continue;
8042
8043 case R_PPC_NONE:
8044 case R_PPC_TLS:
8045 case R_PPC_TLSGD:
8046 case R_PPC_TLSLD:
8047 case R_PPC_EMB_MRKREF:
8048 case R_PPC_GNU_VTINHERIT:
8049 case R_PPC_GNU_VTENTRY:
8050 continue;
8051
8052 /* GOT16 relocations. Like an ADDR16 using the symbol's
8053 address in the GOT as relocation value instead of the
8054 symbol's value itself. Also, create a GOT entry for the
8055 symbol and put the symbol value there. */
8056 case R_PPC_GOT_TLSGD16:
8057 case R_PPC_GOT_TLSGD16_LO:
8058 case R_PPC_GOT_TLSGD16_HI:
8059 case R_PPC_GOT_TLSGD16_HA:
8060 tls_type = TLS_TLS | TLS_GD;
8061 goto dogot;
8062
8063 case R_PPC_GOT_TLSLD16:
8064 case R_PPC_GOT_TLSLD16_LO:
8065 case R_PPC_GOT_TLSLD16_HI:
8066 case R_PPC_GOT_TLSLD16_HA:
8067 tls_type = TLS_TLS | TLS_LD;
8068 goto dogot;
8069
8070 case R_PPC_GOT_TPREL16:
8071 case R_PPC_GOT_TPREL16_LO:
8072 case R_PPC_GOT_TPREL16_HI:
8073 case R_PPC_GOT_TPREL16_HA:
8074 tls_type = TLS_TLS | TLS_TPREL;
8075 goto dogot;
8076
8077 case R_PPC_GOT_DTPREL16:
8078 case R_PPC_GOT_DTPREL16_LO:
8079 case R_PPC_GOT_DTPREL16_HI:
8080 case R_PPC_GOT_DTPREL16_HA:
8081 tls_type = TLS_TLS | TLS_DTPREL;
8082 goto dogot;
8083
8084 case R_PPC_GOT16:
8085 case R_PPC_GOT16_LO:
8086 case R_PPC_GOT16_HI:
8087 case R_PPC_GOT16_HA:
8088 tls_mask = 0;
8089 dogot:
8090 {
8091 /* Relocation is to the entry for this symbol in the global
8092 offset table. */
8093 bfd_vma off;
8094 bfd_vma *offp;
8095 unsigned long indx;
8096
8097 if (htab->got == NULL)
8098 abort ();
8099
8100 indx = 0;
8101 if (tls_type == (TLS_TLS | TLS_LD)
8102 && (h == NULL
8103 || !h->def_dynamic))
8104 offp = &htab->tlsld_got.offset;
8105 else if (h != NULL)
8106 {
8107 bfd_boolean dyn;
8108 dyn = htab->elf.dynamic_sections_created;
8109 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8110 || (info->shared
8111 && SYMBOL_REFERENCES_LOCAL (info, h)))
8112 /* This is actually a static link, or it is a
8113 -Bsymbolic link and the symbol is defined
8114 locally, or the symbol was forced to be local
8115 because of a version file. */
8116 ;
8117 else
8118 {
8119 BFD_ASSERT (h->dynindx != -1);
8120 indx = h->dynindx;
8121 unresolved_reloc = FALSE;
8122 }
8123 offp = &h->got.offset;
8124 }
8125 else
8126 {
8127 if (local_got_offsets == NULL)
8128 abort ();
8129 offp = &local_got_offsets[r_symndx];
8130 }
8131
8132 /* The offset must always be a multiple of 4. We use the
8133 least significant bit to record whether we have already
8134 processed this entry. */
8135 off = *offp;
8136 if ((off & 1) != 0)
8137 off &= ~1;
8138 else
8139 {
8140 unsigned int tls_m = (tls_mask
8141 & (TLS_LD | TLS_GD | TLS_DTPREL
8142 | TLS_TPREL | TLS_TPRELGD));
8143
8144 if (offp == &htab->tlsld_got.offset)
8145 tls_m = TLS_LD;
8146 else if (h == NULL
8147 || !h->def_dynamic)
8148 tls_m &= ~TLS_LD;
8149
8150 /* We might have multiple got entries for this sym.
8151 Initialize them all. */
8152 do
8153 {
8154 int tls_ty = 0;
8155
8156 if ((tls_m & TLS_LD) != 0)
8157 {
8158 tls_ty = TLS_TLS | TLS_LD;
8159 tls_m &= ~TLS_LD;
8160 }
8161 else if ((tls_m & TLS_GD) != 0)
8162 {
8163 tls_ty = TLS_TLS | TLS_GD;
8164 tls_m &= ~TLS_GD;
8165 }
8166 else if ((tls_m & TLS_DTPREL) != 0)
8167 {
8168 tls_ty = TLS_TLS | TLS_DTPREL;
8169 tls_m &= ~TLS_DTPREL;
8170 }
8171 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8172 {
8173 tls_ty = TLS_TLS | TLS_TPREL;
8174 tls_m = 0;
8175 }
8176
8177 /* Generate relocs for the dynamic linker. */
8178 if ((info->shared || indx != 0)
8179 && (offp == &htab->tlsld_got.offset
8180 || h == NULL
8181 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8182 || h->root.type != bfd_link_hash_undefweak))
8183 {
8184 asection *rsec = htab->relgot;
8185 bfd_byte * loc;
8186
8187 if (ifunc != NULL)
8188 rsec = htab->reliplt;
8189 outrel.r_offset = (htab->got->output_section->vma
8190 + htab->got->output_offset
8191 + off);
8192 outrel.r_addend = 0;
8193 if (tls_ty & (TLS_LD | TLS_GD))
8194 {
8195 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8196 if (tls_ty == (TLS_TLS | TLS_GD))
8197 {
8198 loc = rsec->contents;
8199 loc += (rsec->reloc_count++
8200 * sizeof (Elf32_External_Rela));
8201 bfd_elf32_swap_reloca_out (output_bfd,
8202 &outrel, loc);
8203 outrel.r_offset += 4;
8204 outrel.r_info
8205 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8206 }
8207 }
8208 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8209 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8210 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8211 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8212 else if (indx != 0)
8213 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8214 else if (ifunc != NULL)
8215 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8216 else
8217 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8218 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8219 {
8220 outrel.r_addend += relocation;
8221 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8222 outrel.r_addend -= htab->elf.tls_sec->vma;
8223 }
8224 loc = rsec->contents;
8225 loc += (rsec->reloc_count++
8226 * sizeof (Elf32_External_Rela));
8227 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8228 }
8229
8230 /* Init the .got section contents if we're not
8231 emitting a reloc. */
8232 else
8233 {
8234 bfd_vma value = relocation;
8235
8236 if (tls_ty == (TLS_TLS | TLS_LD))
8237 value = 1;
8238 else if (tls_ty != 0)
8239 {
8240 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8241 if (tls_ty == (TLS_TLS | TLS_TPREL))
8242 value += DTP_OFFSET - TP_OFFSET;
8243
8244 if (tls_ty == (TLS_TLS | TLS_GD))
8245 {
8246 bfd_put_32 (output_bfd, value,
8247 htab->got->contents + off + 4);
8248 value = 1;
8249 }
8250 }
8251 bfd_put_32 (output_bfd, value,
8252 htab->got->contents + off);
8253 }
8254
8255 off += 4;
8256 if (tls_ty & (TLS_LD | TLS_GD))
8257 off += 4;
8258 }
8259 while (tls_m != 0);
8260
8261 off = *offp;
8262 *offp = off | 1;
8263 }
8264
8265 if (off >= (bfd_vma) -2)
8266 abort ();
8267
8268 if ((tls_type & TLS_TLS) != 0)
8269 {
8270 if (tls_type != (TLS_TLS | TLS_LD))
8271 {
8272 if ((tls_mask & TLS_LD) != 0
8273 && !(h == NULL
8274 || !h->def_dynamic))
8275 off += 8;
8276 if (tls_type != (TLS_TLS | TLS_GD))
8277 {
8278 if ((tls_mask & TLS_GD) != 0)
8279 off += 8;
8280 if (tls_type != (TLS_TLS | TLS_DTPREL))
8281 {
8282 if ((tls_mask & TLS_DTPREL) != 0)
8283 off += 4;
8284 }
8285 }
8286 }
8287 }
8288
8289 relocation = (htab->got->output_section->vma
8290 + htab->got->output_offset
8291 + off
8292 - SYM_VAL (htab->elf.hgot));
8293
8294 /* Addends on got relocations don't make much sense.
8295 x+off@got is actually x@got+off, and since the got is
8296 generated by a hash table traversal, the value in the
8297 got at entry m+n bears little relation to the entry m. */
8298 if (addend != 0)
8299 info->callbacks->einfo
8300 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8301 input_bfd, input_section, rel->r_offset,
8302 howto->name,
8303 sym_name);
8304 }
8305 break;
8306
8307 /* Relocations that need no special processing. */
8308 case R_PPC_LOCAL24PC:
8309 /* It makes no sense to point a local relocation
8310 at a symbol not in this object. */
8311 if (unresolved_reloc)
8312 {
8313 if (! (*info->callbacks->undefined_symbol) (info,
8314 h->root.root.string,
8315 input_bfd,
8316 input_section,
8317 rel->r_offset,
8318 TRUE))
8319 return FALSE;
8320 continue;
8321 }
8322 break;
8323
8324 case R_PPC_DTPREL16:
8325 case R_PPC_DTPREL16_LO:
8326 case R_PPC_DTPREL16_HI:
8327 case R_PPC_DTPREL16_HA:
8328 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8329 break;
8330
8331 /* Relocations that may need to be propagated if this is a shared
8332 object. */
8333 case R_PPC_TPREL16:
8334 case R_PPC_TPREL16_LO:
8335 case R_PPC_TPREL16_HI:
8336 case R_PPC_TPREL16_HA:
8337 if (h != NULL
8338 && h->root.type == bfd_link_hash_undefweak
8339 && h->dynindx == -1)
8340 {
8341 /* Make this relocation against an undefined weak symbol
8342 resolve to zero. This is really just a tweak, since
8343 code using weak externs ought to check that they are
8344 defined before using them. */
8345 bfd_byte *p = contents + rel->r_offset - d_offset;
8346 unsigned int insn = bfd_get_32 (output_bfd, p);
8347 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8348 if (insn != 0)
8349 bfd_put_32 (output_bfd, insn, p);
8350 break;
8351 }
8352 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8353 /* The TPREL16 relocs shouldn't really be used in shared
8354 libs as they will result in DT_TEXTREL being set, but
8355 support them anyway. */
8356 goto dodyn;
8357
8358 case R_PPC_TPREL32:
8359 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8360 goto dodyn;
8361
8362 case R_PPC_DTPREL32:
8363 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8364 goto dodyn;
8365
8366 case R_PPC_DTPMOD32:
8367 relocation = 1;
8368 addend = 0;
8369 goto dodyn;
8370
8371 case R_PPC_REL16:
8372 case R_PPC_REL16_LO:
8373 case R_PPC_REL16_HI:
8374 case R_PPC_REL16_HA:
8375 break;
8376
8377 case R_PPC_REL32:
8378 if (h == NULL || h == htab->elf.hgot)
8379 break;
8380 /* fall through */
8381
8382 case R_PPC_ADDR32:
8383 case R_PPC_ADDR16:
8384 case R_PPC_ADDR16_LO:
8385 case R_PPC_ADDR16_HI:
8386 case R_PPC_ADDR16_HA:
8387 case R_PPC_UADDR32:
8388 case R_PPC_UADDR16:
8389 goto dodyn;
8390
8391 case R_PPC_VLE_REL8:
8392 case R_PPC_VLE_REL15:
8393 case R_PPC_VLE_REL24:
8394 case R_PPC_REL24:
8395 case R_PPC_REL14:
8396 case R_PPC_REL14_BRTAKEN:
8397 case R_PPC_REL14_BRNTAKEN:
8398 /* If these relocations are not to a named symbol, they can be
8399 handled right here, no need to bother the dynamic linker. */
8400 if (SYMBOL_CALLS_LOCAL (info, h)
8401 || h == htab->elf.hgot)
8402 break;
8403 /* fall through */
8404
8405 case R_PPC_ADDR24:
8406 case R_PPC_ADDR14:
8407 case R_PPC_ADDR14_BRTAKEN:
8408 case R_PPC_ADDR14_BRNTAKEN:
8409 if (h != NULL && !info->shared)
8410 break;
8411 /* fall through */
8412
8413 dodyn:
8414 if ((input_section->flags & SEC_ALLOC) == 0
8415 || is_vxworks_tls)
8416 break;
8417
8418 if ((info->shared
8419 && !(h != NULL
8420 && ((h->root.type == bfd_link_hash_undefined
8421 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8422 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8423 || (h->root.type == bfd_link_hash_undefweak
8424 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8425 && (must_be_dyn_reloc (info, r_type)
8426 || !SYMBOL_CALLS_LOCAL (info, h)))
8427 || (ELIMINATE_COPY_RELOCS
8428 && !info->shared
8429 && h != NULL
8430 && h->dynindx != -1
8431 && !h->non_got_ref
8432 && !h->def_regular))
8433 {
8434 int skip;
8435 bfd_byte *loc;
8436 asection *sreloc;
8437 #ifdef DEBUG
8438 fprintf (stderr, "ppc_elf_relocate_section needs to "
8439 "create relocation for %s\n",
8440 (h && h->root.root.string
8441 ? h->root.root.string : "<unknown>"));
8442 #endif
8443
8444 /* When generating a shared object, these relocations
8445 are copied into the output file to be resolved at run
8446 time. */
8447 sreloc = elf_section_data (input_section)->sreloc;
8448 if (ifunc)
8449 sreloc = htab->reliplt;
8450 if (sreloc == NULL)
8451 return FALSE;
8452
8453 skip = 0;
8454 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8455 input_section,
8456 rel->r_offset);
8457 if (outrel.r_offset == (bfd_vma) -1
8458 || outrel.r_offset == (bfd_vma) -2)
8459 skip = (int) outrel.r_offset;
8460 outrel.r_offset += (input_section->output_section->vma
8461 + input_section->output_offset);
8462
8463 if (skip)
8464 memset (&outrel, 0, sizeof outrel);
8465 else if ((h != NULL
8466 && (h->root.type == bfd_link_hash_undefined
8467 || h->root.type == bfd_link_hash_undefweak))
8468 || !SYMBOL_REFERENCES_LOCAL (info, h))
8469 {
8470 BFD_ASSERT (h->dynindx != -1);
8471 unresolved_reloc = FALSE;
8472 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8473 outrel.r_addend = rel->r_addend;
8474 }
8475 else
8476 {
8477 outrel.r_addend = relocation + rel->r_addend;
8478
8479 if (r_type != R_PPC_ADDR32)
8480 {
8481 long indx = 0;
8482
8483 if (ifunc != NULL)
8484 {
8485 /* If we get here when building a static
8486 executable, then the libc startup function
8487 responsible for applying indirect function
8488 relocations is going to complain about
8489 the reloc type.
8490 If we get here when building a dynamic
8491 executable, it will be because we have
8492 a text relocation. The dynamic loader
8493 will set the text segment writable and
8494 non-executable to apply text relocations.
8495 So we'll segfault when trying to run the
8496 indirection function to resolve the reloc. */
8497 info->callbacks->einfo
8498 (_("%P: %H: relocation %s for indirect "
8499 "function %s unsupported\n"),
8500 input_bfd, input_section, rel->r_offset,
8501 howto->name,
8502 sym_name);
8503 ret = FALSE;
8504 }
8505 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8506 ;
8507 else if (sec == NULL || sec->owner == NULL)
8508 {
8509 bfd_set_error (bfd_error_bad_value);
8510 ret = FALSE;
8511 }
8512 else
8513 {
8514 asection *osec;
8515
8516 /* We are turning this relocation into one
8517 against a section symbol. It would be
8518 proper to subtract the symbol's value,
8519 osec->vma, from the emitted reloc addend,
8520 but ld.so expects buggy relocs.
8521 FIXME: Why not always use a zero index? */
8522 osec = sec->output_section;
8523 indx = elf_section_data (osec)->dynindx;
8524 if (indx == 0)
8525 {
8526 osec = htab->elf.text_index_section;
8527 indx = elf_section_data (osec)->dynindx;
8528 }
8529 BFD_ASSERT (indx != 0);
8530 #ifdef DEBUG
8531 if (indx == 0)
8532 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8533 indx, osec->name, osec->flags,
8534 h->root.root.string);
8535 #endif
8536 }
8537
8538 outrel.r_info = ELF32_R_INFO (indx, r_type);
8539 }
8540 else if (ifunc != NULL)
8541 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8542 else
8543 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8544 }
8545
8546 loc = sreloc->contents;
8547 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8548 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8549
8550 if (skip == -1)
8551 continue;
8552
8553 /* This reloc will be computed at runtime. We clear the memory
8554 so that it contains predictable value. */
8555 if (! skip
8556 && ((input_section->flags & SEC_ALLOC) != 0
8557 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8558 {
8559 relocation = howto->pc_relative ? outrel.r_offset : 0;
8560 addend = 0;
8561 break;
8562 }
8563 }
8564 break;
8565
8566 case R_PPC_RELAX_PLT:
8567 case R_PPC_RELAX_PLTREL24:
8568 if (h != NULL)
8569 {
8570 struct plt_entry *ent;
8571 bfd_vma got2_addend = 0;
8572
8573 if (r_type == R_PPC_RELAX_PLTREL24)
8574 {
8575 if (info->shared)
8576 got2_addend = addend;
8577 addend = 0;
8578 }
8579 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8580 if (htab->plt_type == PLT_NEW)
8581 relocation = (htab->glink->output_section->vma
8582 + htab->glink->output_offset
8583 + ent->glink_offset);
8584 else
8585 relocation = (htab->plt->output_section->vma
8586 + htab->plt->output_offset
8587 + ent->plt.offset);
8588 }
8589 /* Fall thru */
8590
8591 case R_PPC_RELAX:
8592 {
8593 const int *stub;
8594 size_t size;
8595 size_t insn_offset = rel->r_offset;
8596 unsigned int insn;
8597
8598 if (info->shared)
8599 {
8600 relocation -= (input_section->output_section->vma
8601 + input_section->output_offset
8602 + rel->r_offset - 4);
8603 stub = shared_stub_entry;
8604 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8605 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8606 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8607 stub += 3;
8608 size = ARRAY_SIZE (shared_stub_entry) - 3;
8609 }
8610 else
8611 {
8612 stub = stub_entry;
8613 size = ARRAY_SIZE (stub_entry);
8614 }
8615
8616 relocation += addend;
8617 if (info->relocatable)
8618 relocation = 0;
8619
8620 /* First insn is HA, second is LO. */
8621 insn = *stub++;
8622 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8623 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8624 insn_offset += 4;
8625
8626 insn = *stub++;
8627 insn |= relocation & 0xffff;
8628 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8629 insn_offset += 4;
8630 size -= 2;
8631
8632 while (size != 0)
8633 {
8634 insn = *stub++;
8635 --size;
8636 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8637 insn_offset += 4;
8638 }
8639
8640 /* Rewrite the reloc and convert one of the trailing nop
8641 relocs to describe this relocation. */
8642 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8643 /* The relocs are at the bottom 2 bytes */
8644 rel[0].r_offset += d_offset;
8645 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8646 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8647 rel[1].r_offset += 4;
8648 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8649 rel++;
8650 }
8651 continue;
8652
8653 /* Indirect .sdata relocation. */
8654 case R_PPC_EMB_SDAI16:
8655 BFD_ASSERT (htab->sdata[0].section != NULL);
8656 if (!is_static_defined (htab->sdata[0].sym))
8657 {
8658 unresolved_reloc = TRUE;
8659 break;
8660 }
8661 relocation
8662 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8663 h, relocation, rel);
8664 addend = 0;
8665 break;
8666
8667 /* Indirect .sdata2 relocation. */
8668 case R_PPC_EMB_SDA2I16:
8669 BFD_ASSERT (htab->sdata[1].section != NULL);
8670 if (!is_static_defined (htab->sdata[1].sym))
8671 {
8672 unresolved_reloc = TRUE;
8673 break;
8674 }
8675 relocation
8676 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8677 h, relocation, rel);
8678 addend = 0;
8679 break;
8680
8681 /* Handle the TOC16 reloc. We want to use the offset within the .got
8682 section, not the actual VMA. This is appropriate when generating
8683 an embedded ELF object, for which the .got section acts like the
8684 AIX .toc section. */
8685 case R_PPC_TOC16: /* phony GOT16 relocations */
8686 if (sec == NULL || sec->output_section == NULL)
8687 {
8688 unresolved_reloc = TRUE;
8689 break;
8690 }
8691 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8692 ".got") == 0
8693 || strcmp (bfd_get_section_name (sec->owner, sec),
8694 ".cgot") == 0);
8695
8696 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8697 break;
8698
8699 case R_PPC_PLTREL24:
8700 if (h != NULL && ifunc == NULL)
8701 {
8702 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8703 info->shared ? addend : 0);
8704 if (ent == NULL
8705 || htab->plt == NULL)
8706 {
8707 /* We didn't make a PLT entry for this symbol. This
8708 happens when statically linking PIC code, or when
8709 using -Bsymbolic. */
8710 }
8711 else
8712 {
8713 /* Relocation is to the entry for this symbol in the
8714 procedure linkage table. */
8715 unresolved_reloc = FALSE;
8716 if (htab->plt_type == PLT_NEW)
8717 relocation = (htab->glink->output_section->vma
8718 + htab->glink->output_offset
8719 + ent->glink_offset);
8720 else
8721 relocation = (htab->plt->output_section->vma
8722 + htab->plt->output_offset
8723 + ent->plt.offset);
8724 }
8725 }
8726
8727 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8728 addend specifies the GOT pointer offset within .got2.
8729 Don't apply it to the relocation field. */
8730 addend = 0;
8731 break;
8732
8733 /* Relocate against _SDA_BASE_. */
8734 case R_PPC_SDAREL16:
8735 {
8736 const char *name;
8737 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8738
8739 if (sec == NULL
8740 || sec->output_section == NULL
8741 || !is_static_defined (sda))
8742 {
8743 unresolved_reloc = TRUE;
8744 break;
8745 }
8746 addend -= SYM_VAL (sda);
8747
8748 name = bfd_get_section_name (output_bfd, sec->output_section);
8749 if (!(strcmp (name, ".sdata") == 0
8750 || strcmp (name, ".sbss") == 0))
8751 {
8752 info->callbacks->einfo
8753 (_("%P: %B: the target (%s) of a %s relocation is "
8754 "in the wrong output section (%s)\n"),
8755 input_bfd,
8756 sym_name,
8757 howto->name,
8758 name);
8759 }
8760 }
8761 break;
8762
8763 /* Relocate against _SDA2_BASE_. */
8764 case R_PPC_EMB_SDA2REL:
8765 {
8766 const char *name;
8767 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8768
8769 if (sec == NULL
8770 || sec->output_section == NULL
8771 || !is_static_defined (sda))
8772 {
8773 unresolved_reloc = TRUE;
8774 break;
8775 }
8776 addend -= SYM_VAL (sda);
8777
8778 name = bfd_get_section_name (output_bfd, sec->output_section);
8779 if (!(strcmp (name, ".sdata2") == 0
8780 || strcmp (name, ".sbss2") == 0))
8781 {
8782 info->callbacks->einfo
8783 (_("%P: %B: the target (%s) of a %s relocation is "
8784 "in the wrong output section (%s)\n"),
8785 input_bfd,
8786 sym_name,
8787 howto->name,
8788 name);
8789 }
8790 }
8791 break;
8792
8793 case R_PPC_VLE_LO16A:
8794 relocation = relocation + addend;
8795 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8796 relocation, split16a_type);
8797 continue;
8798
8799 case R_PPC_VLE_LO16D:
8800 relocation = relocation + addend;
8801 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8802 relocation, split16d_type);
8803 continue;
8804
8805 case R_PPC_VLE_HI16A:
8806 relocation = (relocation + addend) >> 16;
8807 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8808 relocation, split16a_type);
8809 continue;
8810
8811 case R_PPC_VLE_HI16D:
8812 relocation = (relocation + addend) >> 16;
8813 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8814 relocation, split16d_type);
8815 continue;
8816
8817 case R_PPC_VLE_HA16A:
8818 relocation = (relocation + addend + 0x8000) >> 16;
8819 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8820 relocation, split16a_type);
8821 continue;
8822
8823 case R_PPC_VLE_HA16D:
8824 relocation = (relocation + addend + 0x8000) >> 16;
8825 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8826 relocation, split16d_type);
8827 continue;
8828
8829 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8830 case R_PPC_EMB_SDA21:
8831 case R_PPC_VLE_SDA21:
8832 case R_PPC_EMB_RELSDA:
8833 case R_PPC_VLE_SDA21_LO:
8834 {
8835 const char *name;
8836 int reg;
8837 unsigned int insn;
8838 struct elf_link_hash_entry *sda = NULL;
8839
8840 if (sec == NULL || sec->output_section == NULL)
8841 {
8842 unresolved_reloc = TRUE;
8843 break;
8844 }
8845
8846 name = bfd_get_section_name (output_bfd, sec->output_section);
8847 if (strcmp (name, ".sdata") == 0
8848 || strcmp (name, ".sbss") == 0)
8849 {
8850 reg = 13;
8851 sda = htab->sdata[0].sym;
8852 }
8853 else if (strcmp (name, ".sdata2") == 0
8854 || strcmp (name, ".sbss2") == 0)
8855 {
8856 reg = 2;
8857 sda = htab->sdata[1].sym;
8858 }
8859 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8860 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8861 {
8862 reg = 0;
8863 }
8864 else
8865 {
8866 info->callbacks->einfo
8867 (_("%P: %B: the target (%s) of a %s relocation is "
8868 "in the wrong output section (%s)\n"),
8869 input_bfd,
8870 sym_name,
8871 howto->name,
8872 name);
8873
8874 bfd_set_error (bfd_error_bad_value);
8875 ret = FALSE;
8876 continue;
8877 }
8878
8879 if (sda != NULL)
8880 {
8881 if (!is_static_defined (sda))
8882 {
8883 unresolved_reloc = TRUE;
8884 break;
8885 }
8886 addend -= SYM_VAL (sda);
8887 }
8888
8889 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8890 if (reg == 0
8891 && (r_type == R_PPC_VLE_SDA21
8892 || r_type == R_PPC_VLE_SDA21_LO))
8893 {
8894 relocation = relocation + addend;
8895 addend = 0;
8896
8897 /* Force e_li insn, keeping RT from original insn. */
8898 insn &= 0x1f << 21;
8899 insn |= 28u << 26;
8900
8901 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8902 /* Top 4 bits of value to 17..20. */
8903 insn |= (relocation & 0xf0000) >> 5;
8904 /* Next 5 bits of the value to 11..15. */
8905 insn |= (relocation & 0xf800) << 5;
8906 /* And the final 11 bits of the value to bits 21 to 31. */
8907 insn |= relocation & 0x7ff;
8908
8909 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8910
8911 if (r_type == R_PPC_VLE_SDA21
8912 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8913 goto overflow;
8914 continue;
8915 }
8916 else if (r_type == R_PPC_EMB_SDA21
8917 || r_type == R_PPC_VLE_SDA21
8918 || r_type == R_PPC_VLE_SDA21_LO)
8919 {
8920 /* Fill in register field. */
8921 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8922 }
8923 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8924 }
8925 break;
8926
8927 case R_PPC_VLE_SDAREL_LO16A:
8928 case R_PPC_VLE_SDAREL_LO16D:
8929 case R_PPC_VLE_SDAREL_HI16A:
8930 case R_PPC_VLE_SDAREL_HI16D:
8931 case R_PPC_VLE_SDAREL_HA16A:
8932 case R_PPC_VLE_SDAREL_HA16D:
8933 {
8934 bfd_vma value;
8935 const char *name;
8936 //int reg;
8937 struct elf_link_hash_entry *sda = NULL;
8938
8939 if (sec == NULL || sec->output_section == NULL)
8940 {
8941 unresolved_reloc = TRUE;
8942 break;
8943 }
8944
8945 name = bfd_get_section_name (output_bfd, sec->output_section);
8946 if (strcmp (name, ".sdata") == 0
8947 || strcmp (name, ".sbss") == 0)
8948 {
8949 //reg = 13;
8950 sda = htab->sdata[0].sym;
8951 }
8952 else if (strcmp (name, ".sdata2") == 0
8953 || strcmp (name, ".sbss2") == 0)
8954 {
8955 //reg = 2;
8956 sda = htab->sdata[1].sym;
8957 }
8958 else
8959 {
8960 (*_bfd_error_handler)
8961 (_("%B: the target (%s) of a %s relocation is "
8962 "in the wrong output section (%s)"),
8963 input_bfd,
8964 sym_name,
8965 howto->name,
8966 name);
8967
8968 bfd_set_error (bfd_error_bad_value);
8969 ret = FALSE;
8970 continue;
8971 }
8972
8973 if (sda != NULL)
8974 {
8975 if (!is_static_defined (sda))
8976 {
8977 unresolved_reloc = TRUE;
8978 break;
8979 }
8980 }
8981
8982 value = (sda->root.u.def.section->output_section->vma
8983 + sda->root.u.def.section->output_offset
8984 + addend);
8985
8986 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8987 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8988 value, split16a_type);
8989 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8990 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8991 value, split16d_type);
8992 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8993 {
8994 value = value >> 16;
8995 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8996 value, split16a_type);
8997 }
8998 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8999 {
9000 value = value >> 16;
9001 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9002 value, split16d_type);
9003 }
9004 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9005 {
9006 value = (value + 0x8000) >> 16;
9007 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9008 value, split16a_type);
9009 }
9010 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9011 {
9012 value = (value + 0x8000) >> 16;
9013 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9014 value, split16d_type);
9015 }
9016 }
9017 continue;
9018
9019 /* Relocate against the beginning of the section. */
9020 case R_PPC_SECTOFF:
9021 case R_PPC_SECTOFF_LO:
9022 case R_PPC_SECTOFF_HI:
9023 case R_PPC_SECTOFF_HA:
9024 if (sec == NULL || sec->output_section == NULL)
9025 {
9026 unresolved_reloc = TRUE;
9027 break;
9028 }
9029 addend -= sec->output_section->vma;
9030 break;
9031
9032 /* Negative relocations. */
9033 case R_PPC_EMB_NADDR32:
9034 case R_PPC_EMB_NADDR16:
9035 case R_PPC_EMB_NADDR16_LO:
9036 case R_PPC_EMB_NADDR16_HI:
9037 case R_PPC_EMB_NADDR16_HA:
9038 addend -= 2 * relocation;
9039 break;
9040
9041 case R_PPC_COPY:
9042 case R_PPC_GLOB_DAT:
9043 case R_PPC_JMP_SLOT:
9044 case R_PPC_RELATIVE:
9045 case R_PPC_IRELATIVE:
9046 case R_PPC_PLT32:
9047 case R_PPC_PLTREL32:
9048 case R_PPC_PLT16_LO:
9049 case R_PPC_PLT16_HI:
9050 case R_PPC_PLT16_HA:
9051 case R_PPC_ADDR30:
9052 case R_PPC_EMB_RELSEC16:
9053 case R_PPC_EMB_RELST_LO:
9054 case R_PPC_EMB_RELST_HI:
9055 case R_PPC_EMB_RELST_HA:
9056 case R_PPC_EMB_BIT_FLD:
9057 info->callbacks->einfo
9058 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9059 input_bfd,
9060 howto->name,
9061 sym_name);
9062
9063 bfd_set_error (bfd_error_invalid_operation);
9064 ret = FALSE;
9065 continue;
9066 }
9067
9068 /* Do any further special processing. */
9069 switch (r_type)
9070 {
9071 default:
9072 break;
9073
9074 case R_PPC_ADDR16_HA:
9075 case R_PPC_REL16_HA:
9076 case R_PPC_SECTOFF_HA:
9077 case R_PPC_TPREL16_HA:
9078 case R_PPC_DTPREL16_HA:
9079 case R_PPC_EMB_NADDR16_HA:
9080 case R_PPC_EMB_RELST_HA:
9081 /* It's just possible that this symbol is a weak symbol
9082 that's not actually defined anywhere. In that case,
9083 'sec' would be NULL, and we should leave the symbol
9084 alone (it will be set to zero elsewhere in the link). */
9085 if (sec == NULL)
9086 break;
9087 /* Fall thru */
9088
9089 case R_PPC_PLT16_HA:
9090 case R_PPC_GOT16_HA:
9091 case R_PPC_GOT_TLSGD16_HA:
9092 case R_PPC_GOT_TLSLD16_HA:
9093 case R_PPC_GOT_TPREL16_HA:
9094 case R_PPC_GOT_DTPREL16_HA:
9095 /* Add 0x10000 if sign bit in 0:15 is set.
9096 Bits 0:15 are not used. */
9097 addend += 0x8000;
9098 break;
9099
9100 case R_PPC_ADDR16:
9101 case R_PPC_ADDR16_LO:
9102 case R_PPC_GOT16:
9103 case R_PPC_GOT16_LO:
9104 case R_PPC_SDAREL16:
9105 case R_PPC_SECTOFF:
9106 case R_PPC_SECTOFF_LO:
9107 case R_PPC_DTPREL16:
9108 case R_PPC_DTPREL16_LO:
9109 case R_PPC_TPREL16:
9110 case R_PPC_TPREL16_LO:
9111 case R_PPC_GOT_TLSGD16:
9112 case R_PPC_GOT_TLSGD16_LO:
9113 case R_PPC_GOT_TLSLD16:
9114 case R_PPC_GOT_TLSLD16_LO:
9115 case R_PPC_GOT_DTPREL16:
9116 case R_PPC_GOT_DTPREL16_LO:
9117 case R_PPC_GOT_TPREL16:
9118 case R_PPC_GOT_TPREL16_LO:
9119 {
9120 /* The 32-bit ABI lacks proper relocations to deal with
9121 certain 64-bit instructions. Prevent damage to bits
9122 that make up part of the insn opcode. */
9123 unsigned int insn, mask, lobit;
9124
9125 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9126 mask = 0;
9127 if (is_insn_ds_form (insn))
9128 mask = 3;
9129 else if (is_insn_dq_form (insn))
9130 mask = 15;
9131 else
9132 break;
9133 lobit = mask & (relocation + addend);
9134 if (lobit != 0)
9135 {
9136 addend -= lobit;
9137 info->callbacks->einfo
9138 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9139 input_bfd, input_section, rel->r_offset,
9140 howto->name, sym_name, mask + 1);
9141 bfd_set_error (bfd_error_bad_value);
9142 ret = FALSE;
9143 }
9144 addend += insn & mask;
9145 }
9146 break;
9147 }
9148
9149 #ifdef DEBUG
9150 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9151 "offset = %ld, addend = %ld\n",
9152 howto->name,
9153 (int) r_type,
9154 sym_name,
9155 r_symndx,
9156 (long) rel->r_offset,
9157 (long) addend);
9158 #endif
9159
9160 if (unresolved_reloc
9161 && !((input_section->flags & SEC_DEBUGGING) != 0
9162 && h->def_dynamic)
9163 && _bfd_elf_section_offset (output_bfd, info, input_section,
9164 rel->r_offset) != (bfd_vma) -1)
9165 {
9166 info->callbacks->einfo
9167 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9168 input_bfd, input_section, rel->r_offset,
9169 howto->name,
9170 sym_name);
9171 ret = FALSE;
9172 }
9173
9174 /* 16-bit fields in insns mostly have signed values, but a
9175 few insns have 16-bit unsigned values. Really, we should
9176 have different reloc types. */
9177 if (howto->complain_on_overflow != complain_overflow_dont
9178 && howto->dst_mask == 0xffff
9179 && (input_section->flags & SEC_CODE) != 0)
9180 {
9181 enum complain_overflow complain = complain_overflow_signed;
9182
9183 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9184 {
9185 unsigned int insn;
9186
9187 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9188 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9189 complain = complain_overflow_bitfield;
9190 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9191 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9192 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9193 complain = complain_overflow_unsigned;
9194 }
9195 if (howto->complain_on_overflow != complain)
9196 {
9197 alt_howto = *howto;
9198 alt_howto.complain_on_overflow = complain;
9199 howto = &alt_howto;
9200 }
9201 }
9202
9203 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9204 rel->r_offset, relocation, addend);
9205
9206 if (r != bfd_reloc_ok)
9207 {
9208 if (r == bfd_reloc_overflow)
9209 {
9210 overflow:
9211 if (warned)
9212 continue;
9213 if (h != NULL
9214 && h->root.type == bfd_link_hash_undefweak
9215 && howto->pc_relative)
9216 {
9217 /* Assume this is a call protected by other code that
9218 detect the symbol is undefined. If this is the case,
9219 we can safely ignore the overflow. If not, the
9220 program is hosed anyway, and a little warning isn't
9221 going to help. */
9222
9223 continue;
9224 }
9225
9226 if (! (*info->callbacks->reloc_overflow) (info,
9227 (h ? &h->root : NULL),
9228 sym_name,
9229 howto->name,
9230 rel->r_addend,
9231 input_bfd,
9232 input_section,
9233 rel->r_offset))
9234 return FALSE;
9235 }
9236 else
9237 {
9238 info->callbacks->einfo
9239 (_("%P: %H: %s reloc against `%s': error %d\n"),
9240 input_bfd, input_section, rel->r_offset,
9241 howto->name, sym_name, (int) r);
9242 ret = FALSE;
9243 }
9244 }
9245 }
9246
9247 #ifdef DEBUG
9248 fprintf (stderr, "\n");
9249 #endif
9250
9251 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9252 && input_section->size != input_section->rawsize
9253 && (strcmp (input_section->output_section->name, ".init") == 0
9254 || strcmp (input_section->output_section->name, ".fini") == 0))
9255 {
9256 /* Branch around the trampolines. */
9257 unsigned int insn = B + input_section->size - input_section->rawsize;
9258 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9259 }
9260
9261 if (htab->params->ppc476_workaround
9262 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9263 && (!info->relocatable
9264 || (input_section->output_section->alignment_power
9265 >= htab->params->pagesize_p2)))
9266 {
9267 struct ppc_elf_relax_info *relax_info;
9268 bfd_vma start_addr, end_addr, addr;
9269 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9270
9271 relax_info = elf_section_data (input_section)->sec_info;
9272 if (relax_info->workaround_size != 0)
9273 {
9274 bfd_byte *p;
9275 unsigned int n;
9276 bfd_byte fill[4];
9277
9278 bfd_put_32 (input_bfd, BA, fill);
9279 p = contents + input_section->size - relax_info->workaround_size;
9280 n = relax_info->workaround_size >> 2;
9281 while (n--)
9282 {
9283 memcpy (p, fill, 4);
9284 p += 4;
9285 }
9286 }
9287
9288 /* The idea is: Replace the last instruction on a page with a
9289 branch to a patch area. Put the insn there followed by a
9290 branch back to the next page. Complicated a little by
9291 needing to handle moved conditional branches, and by not
9292 wanting to touch data-in-text. */
9293
9294 start_addr = (input_section->output_section->vma
9295 + input_section->output_offset);
9296 end_addr = (start_addr + input_section->size
9297 - relax_info->workaround_size);
9298 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9299 addr < end_addr;
9300 addr += pagesize)
9301 {
9302 bfd_vma offset = addr - start_addr;
9303 Elf_Internal_Rela *lo, *hi;
9304 bfd_boolean is_data;
9305 bfd_vma patch_off, patch_addr;
9306 unsigned int insn;
9307
9308 /* Do we have a data reloc at this offset? If so, leave
9309 the word alone. */
9310 is_data = FALSE;
9311 lo = relocs;
9312 hi = relend;
9313 rel = NULL;
9314 while (lo < hi)
9315 {
9316 rel = lo + (hi - lo) / 2;
9317 if (rel->r_offset < offset)
9318 lo = rel + 1;
9319 else if (rel->r_offset > offset + 3)
9320 hi = rel;
9321 else
9322 {
9323 switch (ELF32_R_TYPE (rel->r_info))
9324 {
9325 case R_PPC_ADDR32:
9326 case R_PPC_UADDR32:
9327 case R_PPC_REL32:
9328 case R_PPC_ADDR30:
9329 is_data = TRUE;
9330 break;
9331 default:
9332 break;
9333 }
9334 break;
9335 }
9336 }
9337 if (is_data)
9338 continue;
9339
9340 /* Some instructions can be left alone too. Unconditional
9341 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9342 avoid the icache failure.
9343
9344 The problem occurs due to prefetch across a page boundary
9345 where stale instructions can be fetched from the next
9346 page, and the mechanism for flushing these bad
9347 instructions fails under certain circumstances. The
9348 unconditional branches:
9349 1) Branch: b, bl, ba, bla,
9350 2) Branch Conditional: bc, bca, bcl, bcla,
9351 3) Branch Conditional to Link Register: bclr, bclrl,
9352 where (2) and (3) have BO=0x14 making them unconditional,
9353 prevent the bad prefetch because the prefetch itself is
9354 affected by these instructions. This happens even if the
9355 instruction is not executed.
9356
9357 A bctr example:
9358 .
9359 . lis 9,new_page@ha
9360 . addi 9,9,new_page@l
9361 . mtctr 9
9362 . bctr
9363 . nop
9364 . nop
9365 . new_page:
9366 .
9367 The bctr is not predicted taken due to ctr not being
9368 ready, so prefetch continues on past the bctr into the
9369 new page which might have stale instructions. If they
9370 fail to be flushed, then they will be executed after the
9371 bctr executes. Either of the following modifications
9372 prevent the bad prefetch from happening in the first
9373 place:
9374 .
9375 . lis 9,new_page@ha lis 9,new_page@ha
9376 . addi 9,9,new_page@l addi 9,9,new_page@l
9377 . mtctr 9 mtctr 9
9378 . bctr bctr
9379 . nop b somewhere_else
9380 . b somewhere_else nop
9381 . new_page: new_page:
9382 . */
9383 insn = bfd_get_32 (input_bfd, contents + offset);
9384 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9385 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9386 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9387 || ((insn & (0x3f << 26)) == (19u << 26)
9388 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9389 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9390 continue;
9391
9392 patch_addr = (start_addr + input_section->size
9393 - relax_info->workaround_size);
9394 patch_addr = (patch_addr + 15) & -16;
9395 patch_off = patch_addr - start_addr;
9396 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9397
9398 if (rel != NULL
9399 && rel->r_offset >= offset
9400 && rel->r_offset < offset + 4)
9401 {
9402 /* If the insn we are patching had a reloc, adjust the
9403 reloc r_offset so that the reloc applies to the moved
9404 location. This matters for -r and --emit-relocs. */
9405 if (rel + 1 != relend)
9406 {
9407 Elf_Internal_Rela tmp = *rel;
9408
9409 /* Keep the relocs sorted by r_offset. */
9410 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9411 relend[-1] = tmp;
9412 }
9413 relend[-1].r_offset += patch_off - offset;
9414 }
9415 else
9416 rel = NULL;
9417
9418 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9419 && (insn & 2) == 0 /* relative */)
9420 {
9421 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9422
9423 delta += offset - patch_off;
9424 if (info->relocatable && rel != NULL)
9425 delta = 0;
9426 if (!info->relocatable && rel != NULL)
9427 {
9428 enum elf_ppc_reloc_type r_type;
9429
9430 r_type = ELF32_R_TYPE (relend[-1].r_info);
9431 if (r_type == R_PPC_REL14_BRTAKEN)
9432 insn |= BRANCH_PREDICT_BIT;
9433 else if (r_type == R_PPC_REL14_BRNTAKEN)
9434 insn &= ~BRANCH_PREDICT_BIT;
9435 else
9436 BFD_ASSERT (r_type == R_PPC_REL14);
9437
9438 if ((r_type == R_PPC_REL14_BRTAKEN
9439 || r_type == R_PPC_REL14_BRNTAKEN)
9440 && delta + 0x8000 < 0x10000
9441 && (bfd_signed_vma) delta < 0)
9442 insn ^= BRANCH_PREDICT_BIT;
9443 }
9444 if (delta + 0x8000 < 0x10000)
9445 {
9446 bfd_put_32 (input_bfd,
9447 (insn & ~0xfffc) | (delta & 0xfffc),
9448 contents + patch_off);
9449 patch_off += 4;
9450 bfd_put_32 (input_bfd,
9451 B | ((offset + 4 - patch_off) & 0x3fffffc),
9452 contents + patch_off);
9453 patch_off += 4;
9454 }
9455 else
9456 {
9457 if (rel != NULL)
9458 {
9459 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9460
9461 relend[-1].r_offset += 8;
9462 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9463 }
9464 bfd_put_32 (input_bfd,
9465 (insn & ~0xfffc) | 8,
9466 contents + patch_off);
9467 patch_off += 4;
9468 bfd_put_32 (input_bfd,
9469 B | ((offset + 4 - patch_off) & 0x3fffffc),
9470 contents + patch_off);
9471 patch_off += 4;
9472 bfd_put_32 (input_bfd,
9473 B | ((delta - 8) & 0x3fffffc),
9474 contents + patch_off);
9475 patch_off += 4;
9476 }
9477 }
9478 else
9479 {
9480 bfd_put_32 (input_bfd, insn, contents + patch_off);
9481 patch_off += 4;
9482 bfd_put_32 (input_bfd,
9483 B | ((offset + 4 - patch_off) & 0x3fffffc),
9484 contents + patch_off);
9485 patch_off += 4;
9486 }
9487 BFD_ASSERT (patch_off <= input_section->size);
9488 relax_info->workaround_size = input_section->size - patch_off;
9489 }
9490 }
9491
9492 return ret;
9493 }
9494 \f
9495 /* Finish up dynamic symbol handling. We set the contents of various
9496 dynamic sections here. */
9497
9498 static bfd_boolean
9499 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9500 struct bfd_link_info *info,
9501 struct elf_link_hash_entry *h,
9502 Elf_Internal_Sym *sym)
9503 {
9504 struct ppc_elf_link_hash_table *htab;
9505 struct plt_entry *ent;
9506 bfd_boolean doneone;
9507
9508 #ifdef DEBUG
9509 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9510 h->root.root.string);
9511 #endif
9512
9513 htab = ppc_elf_hash_table (info);
9514 BFD_ASSERT (htab->elf.dynobj != NULL);
9515
9516 doneone = FALSE;
9517 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9518 if (ent->plt.offset != (bfd_vma) -1)
9519 {
9520 if (!doneone)
9521 {
9522 Elf_Internal_Rela rela;
9523 bfd_byte *loc;
9524 bfd_vma reloc_index;
9525
9526 if (htab->plt_type == PLT_NEW
9527 || !htab->elf.dynamic_sections_created
9528 || h->dynindx == -1)
9529 reloc_index = ent->plt.offset / 4;
9530 else
9531 {
9532 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9533 / htab->plt_slot_size);
9534 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9535 && htab->plt_type == PLT_OLD)
9536 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9537 }
9538
9539 /* This symbol has an entry in the procedure linkage table.
9540 Set it up. */
9541 if (htab->plt_type == PLT_VXWORKS
9542 && htab->elf.dynamic_sections_created
9543 && h->dynindx != -1)
9544 {
9545 bfd_vma got_offset;
9546 const bfd_vma *plt_entry;
9547
9548 /* The first three entries in .got.plt are reserved. */
9549 got_offset = (reloc_index + 3) * 4;
9550
9551 /* Use the right PLT. */
9552 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9553 : ppc_elf_vxworks_plt_entry;
9554
9555 /* Fill in the .plt on VxWorks. */
9556 if (info->shared)
9557 {
9558 bfd_put_32 (output_bfd,
9559 plt_entry[0] | PPC_HA (got_offset),
9560 htab->plt->contents + ent->plt.offset + 0);
9561 bfd_put_32 (output_bfd,
9562 plt_entry[1] | PPC_LO (got_offset),
9563 htab->plt->contents + ent->plt.offset + 4);
9564 }
9565 else
9566 {
9567 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9568
9569 bfd_put_32 (output_bfd,
9570 plt_entry[0] | PPC_HA (got_loc),
9571 htab->plt->contents + ent->plt.offset + 0);
9572 bfd_put_32 (output_bfd,
9573 plt_entry[1] | PPC_LO (got_loc),
9574 htab->plt->contents + ent->plt.offset + 4);
9575 }
9576
9577 bfd_put_32 (output_bfd, plt_entry[2],
9578 htab->plt->contents + ent->plt.offset + 8);
9579 bfd_put_32 (output_bfd, plt_entry[3],
9580 htab->plt->contents + ent->plt.offset + 12);
9581
9582 /* This instruction is an immediate load. The value loaded is
9583 the byte offset of the R_PPC_JMP_SLOT relocation from the
9584 start of the .rela.plt section. The value is stored in the
9585 low-order 16 bits of the load instruction. */
9586 /* NOTE: It appears that this is now an index rather than a
9587 prescaled offset. */
9588 bfd_put_32 (output_bfd,
9589 plt_entry[4] | reloc_index,
9590 htab->plt->contents + ent->plt.offset + 16);
9591 /* This instruction is a PC-relative branch whose target is
9592 the start of the PLT section. The address of this branch
9593 instruction is 20 bytes beyond the start of this PLT entry.
9594 The address is encoded in bits 6-29, inclusive. The value
9595 stored is right-shifted by two bits, permitting a 26-bit
9596 offset. */
9597 bfd_put_32 (output_bfd,
9598 (plt_entry[5]
9599 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9600 htab->plt->contents + ent->plt.offset + 20);
9601 bfd_put_32 (output_bfd, plt_entry[6],
9602 htab->plt->contents + ent->plt.offset + 24);
9603 bfd_put_32 (output_bfd, plt_entry[7],
9604 htab->plt->contents + ent->plt.offset + 28);
9605
9606 /* Fill in the GOT entry corresponding to this PLT slot with
9607 the address immediately after the "bctr" instruction
9608 in this PLT entry. */
9609 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9610 + htab->plt->output_offset
9611 + ent->plt.offset + 16),
9612 htab->sgotplt->contents + got_offset);
9613
9614 if (!info->shared)
9615 {
9616 /* Fill in a couple of entries in .rela.plt.unloaded. */
9617 loc = htab->srelplt2->contents
9618 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9619 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9620 * sizeof (Elf32_External_Rela));
9621
9622 /* Provide the @ha relocation for the first instruction. */
9623 rela.r_offset = (htab->plt->output_section->vma
9624 + htab->plt->output_offset
9625 + ent->plt.offset + 2);
9626 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9627 R_PPC_ADDR16_HA);
9628 rela.r_addend = got_offset;
9629 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9630 loc += sizeof (Elf32_External_Rela);
9631
9632 /* Provide the @l relocation for the second instruction. */
9633 rela.r_offset = (htab->plt->output_section->vma
9634 + htab->plt->output_offset
9635 + ent->plt.offset + 6);
9636 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9637 R_PPC_ADDR16_LO);
9638 rela.r_addend = got_offset;
9639 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9640 loc += sizeof (Elf32_External_Rela);
9641
9642 /* Provide a relocation for the GOT entry corresponding to this
9643 PLT slot. Point it at the middle of the .plt entry. */
9644 rela.r_offset = (htab->sgotplt->output_section->vma
9645 + htab->sgotplt->output_offset
9646 + got_offset);
9647 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9648 R_PPC_ADDR32);
9649 rela.r_addend = ent->plt.offset + 16;
9650 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9651 }
9652
9653 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9654 In particular, the offset for the relocation is not the
9655 address of the PLT entry for this function, as specified
9656 by the ABI. Instead, the offset is set to the address of
9657 the GOT slot for this function. See EABI 4.4.4.1. */
9658 rela.r_offset = (htab->sgotplt->output_section->vma
9659 + htab->sgotplt->output_offset
9660 + got_offset);
9661
9662 }
9663 else
9664 {
9665 asection *splt = htab->plt;
9666 if (!htab->elf.dynamic_sections_created
9667 || h->dynindx == -1)
9668 splt = htab->iplt;
9669
9670 rela.r_offset = (splt->output_section->vma
9671 + splt->output_offset
9672 + ent->plt.offset);
9673 if (htab->plt_type == PLT_OLD
9674 || !htab->elf.dynamic_sections_created
9675 || h->dynindx == -1)
9676 {
9677 /* We don't need to fill in the .plt. The ppc dynamic
9678 linker will fill it in. */
9679 }
9680 else
9681 {
9682 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9683 + htab->glink->output_section->vma
9684 + htab->glink->output_offset);
9685 bfd_put_32 (output_bfd, val,
9686 splt->contents + ent->plt.offset);
9687 }
9688 }
9689
9690 /* Fill in the entry in the .rela.plt section. */
9691 rela.r_addend = 0;
9692 if (!htab->elf.dynamic_sections_created
9693 || h->dynindx == -1)
9694 {
9695 BFD_ASSERT (h->type == STT_GNU_IFUNC
9696 && h->def_regular
9697 && (h->root.type == bfd_link_hash_defined
9698 || h->root.type == bfd_link_hash_defweak));
9699 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9700 rela.r_addend = SYM_VAL (h);
9701 }
9702 else
9703 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9704
9705 if (!htab->elf.dynamic_sections_created
9706 || h->dynindx == -1)
9707 loc = (htab->reliplt->contents
9708 + (htab->reliplt->reloc_count++
9709 * sizeof (Elf32_External_Rela)));
9710 else
9711 loc = (htab->relplt->contents
9712 + reloc_index * sizeof (Elf32_External_Rela));
9713 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9714
9715 if (!h->def_regular)
9716 {
9717 /* Mark the symbol as undefined, rather than as
9718 defined in the .plt section. Leave the value if
9719 there were any relocations where pointer equality
9720 matters (this is a clue for the dynamic linker, to
9721 make function pointer comparisons work between an
9722 application and shared library), otherwise set it
9723 to zero. */
9724 sym->st_shndx = SHN_UNDEF;
9725 if (!h->pointer_equality_needed)
9726 sym->st_value = 0;
9727 else if (!h->ref_regular_nonweak)
9728 {
9729 /* This breaks function pointer comparisons, but
9730 that is better than breaking tests for a NULL
9731 function pointer. */
9732 sym->st_value = 0;
9733 }
9734 }
9735 else if (h->type == STT_GNU_IFUNC
9736 && !info->shared)
9737 {
9738 /* Set the value of ifunc symbols in a non-pie
9739 executable to the glink entry. This is to avoid
9740 text relocations. We can't do this for ifunc in
9741 allocate_dynrelocs, as we do for normal dynamic
9742 function symbols with plt entries, because we need
9743 to keep the original value around for the ifunc
9744 relocation. */
9745 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9746 (output_bfd, htab->glink->output_section));
9747 sym->st_value = (ent->glink_offset
9748 + htab->glink->output_offset
9749 + htab->glink->output_section->vma);
9750 }
9751 doneone = TRUE;
9752 }
9753
9754 if (htab->plt_type == PLT_NEW
9755 || !htab->elf.dynamic_sections_created
9756 || h->dynindx == -1)
9757 {
9758 unsigned char *p;
9759 asection *splt = htab->plt;
9760 if (!htab->elf.dynamic_sections_created
9761 || h->dynindx == -1)
9762 splt = htab->iplt;
9763
9764 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9765
9766 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9767 {
9768 bfd_put_32 (output_bfd, LWZ_11_3, p);
9769 p += 4;
9770 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9771 p += 4;
9772 bfd_put_32 (output_bfd, MR_0_3, p);
9773 p += 4;
9774 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9775 p += 4;
9776 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9777 p += 4;
9778 bfd_put_32 (output_bfd, BEQLR, p);
9779 p += 4;
9780 bfd_put_32 (output_bfd, MR_3_0, p);
9781 p += 4;
9782 bfd_put_32 (output_bfd, NOP, p);
9783 p += 4;
9784 }
9785
9786 write_glink_stub (ent, splt, p, info);
9787
9788 if (!info->shared)
9789 /* We only need one non-PIC glink stub. */
9790 break;
9791 }
9792 else
9793 break;
9794 }
9795
9796 if (h->needs_copy)
9797 {
9798 asection *s;
9799 Elf_Internal_Rela rela;
9800 bfd_byte *loc;
9801
9802 /* This symbols needs a copy reloc. Set it up. */
9803
9804 #ifdef DEBUG
9805 fprintf (stderr, ", copy");
9806 #endif
9807
9808 BFD_ASSERT (h->dynindx != -1);
9809
9810 if (ppc_elf_hash_entry (h)->has_sda_refs)
9811 s = htab->relsbss;
9812 else
9813 s = htab->relbss;
9814 BFD_ASSERT (s != NULL);
9815
9816 rela.r_offset = SYM_VAL (h);
9817 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9818 rela.r_addend = 0;
9819 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9820 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9821 }
9822
9823 #ifdef DEBUG
9824 fprintf (stderr, "\n");
9825 #endif
9826
9827 return TRUE;
9828 }
9829 \f
9830 static enum elf_reloc_type_class
9831 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9832 const asection *rel_sec,
9833 const Elf_Internal_Rela *rela)
9834 {
9835 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9836
9837 if (rel_sec == htab->reliplt)
9838 return reloc_class_ifunc;
9839
9840 switch (ELF32_R_TYPE (rela->r_info))
9841 {
9842 case R_PPC_RELATIVE:
9843 return reloc_class_relative;
9844 case R_PPC_JMP_SLOT:
9845 return reloc_class_plt;
9846 case R_PPC_COPY:
9847 return reloc_class_copy;
9848 default:
9849 return reloc_class_normal;
9850 }
9851 }
9852 \f
9853 /* Finish up the dynamic sections. */
9854
9855 static bfd_boolean
9856 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9857 struct bfd_link_info *info)
9858 {
9859 asection *sdyn;
9860 asection *splt;
9861 struct ppc_elf_link_hash_table *htab;
9862 bfd_vma got;
9863 bfd *dynobj;
9864 bfd_boolean ret = TRUE;
9865
9866 #ifdef DEBUG
9867 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9868 #endif
9869
9870 htab = ppc_elf_hash_table (info);
9871 dynobj = elf_hash_table (info)->dynobj;
9872 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9873 if (htab->is_vxworks)
9874 splt = bfd_get_linker_section (dynobj, ".plt");
9875 else
9876 splt = NULL;
9877
9878 got = 0;
9879 if (htab->elf.hgot != NULL)
9880 got = SYM_VAL (htab->elf.hgot);
9881
9882 if (htab->elf.dynamic_sections_created)
9883 {
9884 Elf32_External_Dyn *dyncon, *dynconend;
9885
9886 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9887
9888 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9889 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9890 for (; dyncon < dynconend; dyncon++)
9891 {
9892 Elf_Internal_Dyn dyn;
9893 asection *s;
9894
9895 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9896
9897 switch (dyn.d_tag)
9898 {
9899 case DT_PLTGOT:
9900 if (htab->is_vxworks)
9901 s = htab->sgotplt;
9902 else
9903 s = htab->plt;
9904 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9905 break;
9906
9907 case DT_PLTRELSZ:
9908 dyn.d_un.d_val = htab->relplt->size;
9909 break;
9910
9911 case DT_JMPREL:
9912 s = htab->relplt;
9913 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9914 break;
9915
9916 case DT_PPC_GOT:
9917 dyn.d_un.d_ptr = got;
9918 break;
9919
9920 case DT_RELASZ:
9921 if (htab->is_vxworks)
9922 {
9923 if (htab->relplt)
9924 dyn.d_un.d_ptr -= htab->relplt->size;
9925 break;
9926 }
9927 continue;
9928
9929 default:
9930 if (htab->is_vxworks
9931 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9932 break;
9933 continue;
9934 }
9935
9936 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9937 }
9938 }
9939
9940 if (htab->got != NULL)
9941 {
9942 if (htab->elf.hgot->root.u.def.section == htab->got
9943 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9944 {
9945 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9946
9947 p += htab->elf.hgot->root.u.def.value;
9948 if (htab->plt_type == PLT_OLD)
9949 {
9950 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9951 so that a function can easily find the address of
9952 _GLOBAL_OFFSET_TABLE_. */
9953 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9954 < htab->elf.hgot->root.u.def.section->size);
9955 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9956 }
9957
9958 if (sdyn != NULL)
9959 {
9960 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9961 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9962 < htab->elf.hgot->root.u.def.section->size);
9963 bfd_put_32 (output_bfd, val, p);
9964 }
9965 }
9966 else
9967 {
9968 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9969 htab->elf.hgot->root.root.string,
9970 (htab->sgotplt != NULL
9971 ? htab->sgotplt->name : htab->got->name));
9972 bfd_set_error (bfd_error_bad_value);
9973 ret = FALSE;
9974 }
9975
9976 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9977 }
9978
9979 /* Fill in the first entry in the VxWorks procedure linkage table. */
9980 if (splt && splt->size > 0)
9981 {
9982 /* Use the right PLT. */
9983 const bfd_vma *plt_entry = (info->shared
9984 ? ppc_elf_vxworks_pic_plt0_entry
9985 : ppc_elf_vxworks_plt0_entry);
9986
9987 if (!info->shared)
9988 {
9989 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9990
9991 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9992 splt->contents + 0);
9993 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9994 splt->contents + 4);
9995 }
9996 else
9997 {
9998 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9999 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10000 }
10001 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10002 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10003 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10004 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10005 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10006 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10007
10008 if (! info->shared)
10009 {
10010 Elf_Internal_Rela rela;
10011 bfd_byte *loc;
10012
10013 loc = htab->srelplt2->contents;
10014
10015 /* Output the @ha relocation for the first instruction. */
10016 rela.r_offset = (htab->plt->output_section->vma
10017 + htab->plt->output_offset
10018 + 2);
10019 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10020 rela.r_addend = 0;
10021 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10022 loc += sizeof (Elf32_External_Rela);
10023
10024 /* Output the @l relocation for the second instruction. */
10025 rela.r_offset = (htab->plt->output_section->vma
10026 + htab->plt->output_offset
10027 + 6);
10028 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10029 rela.r_addend = 0;
10030 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10031 loc += sizeof (Elf32_External_Rela);
10032
10033 /* Fix up the remaining relocations. They may have the wrong
10034 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10035 in which symbols were output. */
10036 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10037 {
10038 Elf_Internal_Rela rel;
10039
10040 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10041 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10042 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10043 loc += sizeof (Elf32_External_Rela);
10044
10045 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10046 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10047 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10048 loc += sizeof (Elf32_External_Rela);
10049
10050 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10051 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10052 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10053 loc += sizeof (Elf32_External_Rela);
10054 }
10055 }
10056 }
10057
10058 if (htab->glink != NULL
10059 && htab->glink->contents != NULL
10060 && htab->elf.dynamic_sections_created)
10061 {
10062 unsigned char *p;
10063 unsigned char *endp;
10064 bfd_vma res0;
10065 unsigned int i;
10066
10067 /*
10068 * PIC glink code is the following:
10069 *
10070 * # ith PLT code stub.
10071 * addis 11,30,(plt+(i-1)*4-got)@ha
10072 * lwz 11,(plt+(i-1)*4-got)@l(11)
10073 * mtctr 11
10074 * bctr
10075 *
10076 * # A table of branches, one for each plt entry.
10077 * # The idea is that the plt call stub loads ctr and r11 with these
10078 * # addresses, so (r11 - res_0) gives the plt index * 4.
10079 * res_0: b PLTresolve
10080 * res_1: b PLTresolve
10081 * .
10082 * # Some number of entries towards the end can be nops
10083 * res_n_m3: nop
10084 * res_n_m2: nop
10085 * res_n_m1:
10086 *
10087 * PLTresolve:
10088 * addis 11,11,(1f-res_0)@ha
10089 * mflr 0
10090 * bcl 20,31,1f
10091 * 1: addi 11,11,(1b-res_0)@l
10092 * mflr 12
10093 * mtlr 0
10094 * sub 11,11,12 # r11 = index * 4
10095 * addis 12,12,(got+4-1b)@ha
10096 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10097 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10098 * mtctr 0
10099 * add 0,11,11
10100 * add 11,0,11 # r11 = index * 12 = reloc offset.
10101 * bctr
10102 */
10103 static const unsigned int pic_plt_resolve[] =
10104 {
10105 ADDIS_11_11,
10106 MFLR_0,
10107 BCL_20_31,
10108 ADDI_11_11,
10109 MFLR_12,
10110 MTLR_0,
10111 SUB_11_11_12,
10112 ADDIS_12_12,
10113 LWZ_0_12,
10114 LWZ_12_12,
10115 MTCTR_0,
10116 ADD_0_11_11,
10117 ADD_11_0_11,
10118 BCTR,
10119 NOP,
10120 NOP
10121 };
10122
10123 /*
10124 * Non-PIC glink code is a little simpler.
10125 *
10126 * # ith PLT code stub.
10127 * lis 11,(plt+(i-1)*4)@ha
10128 * lwz 11,(plt+(i-1)*4)@l(11)
10129 * mtctr 11
10130 * bctr
10131 *
10132 * The branch table is the same, then comes
10133 *
10134 * PLTresolve:
10135 * lis 12,(got+4)@ha
10136 * addis 11,11,(-res_0)@ha
10137 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10138 * addi 11,11,(-res_0)@l # r11 = index * 4
10139 * mtctr 0
10140 * add 0,11,11
10141 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10142 * add 11,0,11 # r11 = index * 12 = reloc offset.
10143 * bctr
10144 */
10145 static const unsigned int plt_resolve[] =
10146 {
10147 LIS_12,
10148 ADDIS_11_11,
10149 LWZ_0_12,
10150 ADDI_11_11,
10151 MTCTR_0,
10152 ADD_0_11_11,
10153 LWZ_12_12,
10154 ADD_11_0_11,
10155 BCTR,
10156 NOP,
10157 NOP,
10158 NOP,
10159 NOP,
10160 NOP,
10161 NOP,
10162 NOP
10163 };
10164
10165 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10166 abort ();
10167 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10168 abort ();
10169
10170 /* Build the branch table, one for each plt entry (less one),
10171 and perhaps some padding. */
10172 p = htab->glink->contents;
10173 p += htab->glink_pltresolve;
10174 endp = htab->glink->contents;
10175 endp += htab->glink->size - GLINK_PLTRESOLVE;
10176 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10177 {
10178 bfd_put_32 (output_bfd, B + endp - p, p);
10179 p += 4;
10180 }
10181 while (p < endp)
10182 {
10183 bfd_put_32 (output_bfd, NOP, p);
10184 p += 4;
10185 }
10186
10187 res0 = (htab->glink_pltresolve
10188 + htab->glink->output_section->vma
10189 + htab->glink->output_offset);
10190
10191 if (htab->params->ppc476_workaround)
10192 {
10193 /* Ensure that a call stub at the end of a page doesn't
10194 result in prefetch over the end of the page into the
10195 glink branch table. */
10196 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10197 bfd_vma page_addr;
10198 bfd_vma glink_start = (htab->glink->output_section->vma
10199 + htab->glink->output_offset);
10200
10201 for (page_addr = res0 & -pagesize;
10202 page_addr > glink_start;
10203 page_addr -= pagesize)
10204 {
10205 /* We have a plt call stub that may need fixing. */
10206 bfd_byte *loc;
10207 unsigned int insn;
10208
10209 loc = htab->glink->contents + page_addr - 4 - glink_start;
10210 insn = bfd_get_32 (output_bfd, loc);
10211 if (insn == BCTR)
10212 {
10213 /* By alignment, we know that there must be at least
10214 one other call stub before this one. */
10215 insn = bfd_get_32 (output_bfd, loc - 16);
10216 if (insn == BCTR)
10217 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10218 else
10219 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10220 }
10221 }
10222 }
10223
10224 /* Last comes the PLTresolve stub. */
10225 if (info->shared)
10226 {
10227 bfd_vma bcl;
10228
10229 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10230 {
10231 unsigned int insn = pic_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 (pic_plt_resolve);
10239
10240 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10241 + htab->glink->output_section->vma
10242 + htab->glink->output_offset);
10243
10244 bfd_put_32 (output_bfd,
10245 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10246 bfd_put_32 (output_bfd,
10247 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10248 bfd_put_32 (output_bfd,
10249 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10250 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10251 {
10252 bfd_put_32 (output_bfd,
10253 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10254 bfd_put_32 (output_bfd,
10255 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10256 }
10257 else
10258 {
10259 bfd_put_32 (output_bfd,
10260 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10261 bfd_put_32 (output_bfd,
10262 LWZ_12_12 + 4, p + 9*4);
10263 }
10264 }
10265 else
10266 {
10267 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10268 {
10269 unsigned int insn = plt_resolve[i];
10270
10271 if (htab->params->ppc476_workaround && insn == NOP)
10272 insn = BA + 0;
10273 bfd_put_32 (output_bfd, insn, p);
10274 p += 4;
10275 }
10276 p -= 4 * ARRAY_SIZE (plt_resolve);
10277
10278 bfd_put_32 (output_bfd,
10279 LIS_12 + PPC_HA (got + 4), p + 0*4);
10280 bfd_put_32 (output_bfd,
10281 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10282 bfd_put_32 (output_bfd,
10283 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10284 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10285 {
10286 bfd_put_32 (output_bfd,
10287 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10288 bfd_put_32 (output_bfd,
10289 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10290 }
10291 else
10292 {
10293 bfd_put_32 (output_bfd,
10294 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10295 bfd_put_32 (output_bfd,
10296 LWZ_12_12 + 4, p + 6*4);
10297 }
10298 }
10299 }
10300
10301 if (htab->glink_eh_frame != NULL
10302 && htab->glink_eh_frame->contents != NULL)
10303 {
10304 unsigned char *p = htab->glink_eh_frame->contents;
10305 bfd_vma val;
10306
10307 p += sizeof (glink_eh_frame_cie);
10308 /* FDE length. */
10309 p += 4;
10310 /* CIE pointer. */
10311 p += 4;
10312 /* Offset to .glink. */
10313 val = (htab->glink->output_section->vma
10314 + htab->glink->output_offset);
10315 val -= (htab->glink_eh_frame->output_section->vma
10316 + htab->glink_eh_frame->output_offset);
10317 val -= p - htab->glink_eh_frame->contents;
10318 bfd_put_32 (htab->elf.dynobj, val, p);
10319
10320 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10321 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10322 htab->glink_eh_frame,
10323 htab->glink_eh_frame->contents))
10324 return FALSE;
10325 }
10326
10327 return ret;
10328 }
10329 \f
10330 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10331 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10332 #define TARGET_BIG_SYM powerpc_elf32_vec
10333 #define TARGET_BIG_NAME "elf32-powerpc"
10334 #define ELF_ARCH bfd_arch_powerpc
10335 #define ELF_TARGET_ID PPC32_ELF_DATA
10336 #define ELF_MACHINE_CODE EM_PPC
10337 #ifdef __QNXTARGET__
10338 #define ELF_MAXPAGESIZE 0x1000
10339 #define ELF_COMMONPAGESIZE 0x1000
10340 #else
10341 #define ELF_MAXPAGESIZE 0x10000
10342 #define ELF_COMMONPAGESIZE 0x10000
10343 #endif
10344 #define ELF_MINPAGESIZE 0x1000
10345 #define elf_info_to_howto ppc_elf_info_to_howto
10346
10347 #ifdef EM_CYGNUS_POWERPC
10348 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10349 #endif
10350
10351 #ifdef EM_PPC_OLD
10352 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10353 #endif
10354
10355 #define elf_backend_plt_not_loaded 1
10356 #define elf_backend_can_gc_sections 1
10357 #define elf_backend_can_refcount 1
10358 #define elf_backend_rela_normal 1
10359 #define elf_backend_caches_rawsize 1
10360
10361 #define bfd_elf32_mkobject ppc_elf_mkobject
10362 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10363 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10364 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10365 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10366 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10367 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10368 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10369
10370 #define elf_backend_object_p ppc_elf_object_p
10371 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10372 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10373 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10374 #define elf_backend_relocate_section ppc_elf_relocate_section
10375 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10376 #define elf_backend_check_relocs ppc_elf_check_relocs
10377 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10378 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10379 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10380 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10381 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10382 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10383 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10384 #define elf_backend_fake_sections ppc_elf_fake_sections
10385 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10386 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10387 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10388 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10389 #define elf_backend_write_core_note ppc_elf_write_core_note
10390 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10391 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10392 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10393 #define elf_backend_write_section ppc_elf_write_section
10394 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10395 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10396 #define elf_backend_action_discarded ppc_elf_action_discarded
10397 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10398 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10399 #define elf_backend_section_processing ppc_elf_section_processing
10400
10401 #include "elf32-target.h"
10402
10403 /* FreeBSD Target */
10404
10405 #undef TARGET_LITTLE_SYM
10406 #undef TARGET_LITTLE_NAME
10407
10408 #undef TARGET_BIG_SYM
10409 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10410 #undef TARGET_BIG_NAME
10411 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10412
10413 #undef ELF_OSABI
10414 #define ELF_OSABI ELFOSABI_FREEBSD
10415
10416 #undef elf32_bed
10417 #define elf32_bed elf32_powerpc_fbsd_bed
10418
10419 #include "elf32-target.h"
10420
10421 /* VxWorks Target */
10422
10423 #undef TARGET_LITTLE_SYM
10424 #undef TARGET_LITTLE_NAME
10425
10426 #undef TARGET_BIG_SYM
10427 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10428 #undef TARGET_BIG_NAME
10429 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10430
10431 #undef ELF_OSABI
10432
10433 /* VxWorks uses the elf default section flags for .plt. */
10434 static const struct bfd_elf_special_section *
10435 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10436 {
10437 if (sec->name == NULL)
10438 return NULL;
10439
10440 if (strcmp (sec->name, ".plt") == 0)
10441 return _bfd_elf_get_sec_type_attr (abfd, sec);
10442
10443 return ppc_elf_get_sec_type_attr (abfd, sec);
10444 }
10445
10446 /* Like ppc_elf_link_hash_table_create, but overrides
10447 appropriately for VxWorks. */
10448 static struct bfd_link_hash_table *
10449 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10450 {
10451 struct bfd_link_hash_table *ret;
10452
10453 ret = ppc_elf_link_hash_table_create (abfd);
10454 if (ret)
10455 {
10456 struct ppc_elf_link_hash_table *htab
10457 = (struct ppc_elf_link_hash_table *)ret;
10458 htab->is_vxworks = 1;
10459 htab->plt_type = PLT_VXWORKS;
10460 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10461 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10462 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10463 }
10464 return ret;
10465 }
10466
10467 /* Tweak magic VxWorks symbols as they are loaded. */
10468 static bfd_boolean
10469 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10470 struct bfd_link_info *info,
10471 Elf_Internal_Sym *sym,
10472 const char **namep ATTRIBUTE_UNUSED,
10473 flagword *flagsp ATTRIBUTE_UNUSED,
10474 asection **secp,
10475 bfd_vma *valp)
10476 {
10477 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10478 valp))
10479 return FALSE;
10480
10481 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10482 }
10483
10484 static void
10485 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10486 {
10487 ppc_elf_final_write_processing(abfd, linker);
10488 elf_vxworks_final_write_processing(abfd, linker);
10489 }
10490
10491 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10492 define it. */
10493 #undef elf_backend_want_plt_sym
10494 #define elf_backend_want_plt_sym 1
10495 #undef elf_backend_want_got_plt
10496 #define elf_backend_want_got_plt 1
10497 #undef elf_backend_got_symbol_offset
10498 #define elf_backend_got_symbol_offset 0
10499 #undef elf_backend_plt_not_loaded
10500 #define elf_backend_plt_not_loaded 0
10501 #undef elf_backend_plt_readonly
10502 #define elf_backend_plt_readonly 1
10503 #undef elf_backend_got_header_size
10504 #define elf_backend_got_header_size 12
10505
10506 #undef bfd_elf32_get_synthetic_symtab
10507
10508 #undef bfd_elf32_bfd_link_hash_table_create
10509 #define bfd_elf32_bfd_link_hash_table_create \
10510 ppc_elf_vxworks_link_hash_table_create
10511 #undef elf_backend_add_symbol_hook
10512 #define elf_backend_add_symbol_hook \
10513 ppc_elf_vxworks_add_symbol_hook
10514 #undef elf_backend_link_output_symbol_hook
10515 #define elf_backend_link_output_symbol_hook \
10516 elf_vxworks_link_output_symbol_hook
10517 #undef elf_backend_final_write_processing
10518 #define elf_backend_final_write_processing \
10519 ppc_elf_vxworks_final_write_processing
10520 #undef elf_backend_get_sec_type_attr
10521 #define elf_backend_get_sec_type_attr \
10522 ppc_elf_vxworks_get_sec_type_attr
10523 #undef elf_backend_emit_relocs
10524 #define elf_backend_emit_relocs \
10525 elf_vxworks_emit_relocs
10526
10527 #undef elf32_bed
10528 #define elf32_bed ppc_elf_vxworks_bed
10529 #undef elf_backend_post_process_headers
10530
10531 #include "elf32-target.h"
GDB Binutils - Deliverables
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