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Add native target for FreeBSD/arm.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x3e007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x3e007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x3e007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x3e007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x3e007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x3e007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* e_li split20 format. */
1660 HOWTO (R_PPC_VLE_ADDR20, /* type */
1661 16, /* rightshift */
1662 2, /* size (0 = byte, 1 = short, 2 = long) */
1663 20, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 bfd_elf_generic_reloc, /* special_function */
1668 "R_PPC_VLE_ADDR20", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0x1f07ff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 HOWTO (R_PPC_IRELATIVE, /* type */
1675 0, /* rightshift */
1676 2, /* size (0 = byte, 1 = short, 2 = long) */
1677 32, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc_elf_unhandled_reloc, /* special_function */
1682 "R_PPC_IRELATIVE", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffffffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation. */
1689 HOWTO (R_PPC_REL16, /* 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_signed, /* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* A 16 bit relative relocation without overflow. */
1704 HOWTO (R_PPC_REL16_LO, /* type */
1705 0, /* 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_LO", /* 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. */
1719 HOWTO (R_PPC_REL16_HI, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 bfd_elf_generic_reloc, /* special_function */
1727 "R_PPC_REL16_HI", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* The high order 16 bits of a relative address, plus 1 if the contents of
1734 the low 16 bits, treated as a signed number, is negative. */
1735 HOWTO (R_PPC_REL16_HA, /* type */
1736 16, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1750 HOWTO (R_PPC_REL16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 TRUE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_REL16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 TRUE), /* pcrel_offset */
1763
1764 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1765 HOWTO (R_PPC_16DX_HA, /* type */
1766 16, /* rightshift */
1767 2, /* 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 ppc_elf_addr16_ha_reloc, /* special_function */
1773 "R_PPC_16DX_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0x1fffc1, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable hierarchy. */
1780 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTINHERIT", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* GNU extension to record C++ vtable member usage. */
1795 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1796 0, /* rightshift */
1797 0, /* size (0 = byte, 1 = short, 2 = long) */
1798 0, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_dont, /* complain_on_overflow */
1802 NULL, /* special_function */
1803 "R_PPC_GNU_VTENTRY", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808
1809 /* Phony reloc to handle AIX style TOC entries. */
1810 HOWTO (R_PPC_TOC16, /* type */
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc_elf_unhandled_reloc, /* special_function */
1818 "R_PPC_TOC16", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xffff, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823 };
1824 \f
1825 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1826
1827 static void
1828 ppc_elf_howto_init (void)
1829 {
1830 unsigned int i, type;
1831
1832 for (i = 0;
1833 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1834 i++)
1835 {
1836 type = ppc_elf_howto_raw[i].type;
1837 if (type >= (sizeof (ppc_elf_howto_table)
1838 / sizeof (ppc_elf_howto_table[0])))
1839 abort ();
1840 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1841 }
1842 }
1843
1844 static reloc_howto_type *
1845 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1846 bfd_reloc_code_real_type code)
1847 {
1848 enum elf_ppc_reloc_type r;
1849
1850 /* Initialize howto table if not already done. */
1851 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1852 ppc_elf_howto_init ();
1853
1854 switch (code)
1855 {
1856 default:
1857 return NULL;
1858
1859 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1860 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1861 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1862 case BFD_RELOC_PPC64_ADDR16_DS:
1863 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1864 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1865 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1866 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1867 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1868 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1869 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1870 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1871 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1872 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1873 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1874 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1875 case BFD_RELOC_PPC64_GOT16_DS:
1876 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1877 case BFD_RELOC_PPC64_GOT16_LO_DS:
1878 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1879 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1880 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1881 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1882 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1883 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1884 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1885 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1886 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1887 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1888 case BFD_RELOC_PPC64_PLT16_LO_DS:
1889 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1890 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1891 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1892 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1893 case BFD_RELOC_PPC64_SECTOFF_DS:
1894 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1895 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1896 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1897 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1898 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1899 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1900 case BFD_RELOC_PPC64_TOC16_DS:
1901 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1902 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1903 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1904 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1905 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1906 case BFD_RELOC_PPC64_TPREL16_DS:
1907 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1908 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1909 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1910 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1911 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1912 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1913 case BFD_RELOC_PPC64_DTPREL16_DS:
1914 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1915 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1916 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1917 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1918 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1919 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1920 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1921 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1922 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1923 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1924 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1925 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1926 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1927 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1928 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1929 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1933 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1934 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1935 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1936 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1937 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1938 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1939 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1940 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1941 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1942 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1943 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1944 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1945 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1946 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1947 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1948 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1949 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1950 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1951 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1952 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1953 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1954 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1955 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1956 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1957 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1958 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1959 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1960 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1961 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1962 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1963 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1964 r = R_PPC_VLE_SDAREL_LO16A;
1965 break;
1966 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1967 r = R_PPC_VLE_SDAREL_LO16D;
1968 break;
1969 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1970 r = R_PPC_VLE_SDAREL_HI16A;
1971 break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1973 r = R_PPC_VLE_SDAREL_HI16D;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1976 r = R_PPC_VLE_SDAREL_HA16A;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1979 r = R_PPC_VLE_SDAREL_HA16D;
1980 break;
1981 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1982 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1983 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1984 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1985 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
1986 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
1987 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1988 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1989 }
1990
1991 return ppc_elf_howto_table[r];
1992 };
1993
1994 static reloc_howto_type *
1995 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1996 const char *r_name)
1997 {
1998 unsigned int i;
1999
2000 for (i = 0;
2001 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2002 i++)
2003 if (ppc_elf_howto_raw[i].name != NULL
2004 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2005 return &ppc_elf_howto_raw[i];
2006
2007 return NULL;
2008 }
2009
2010 /* Set the howto pointer for a PowerPC ELF reloc. */
2011
2012 static void
2013 ppc_elf_info_to_howto (bfd *abfd,
2014 arelent *cache_ptr,
2015 Elf_Internal_Rela *dst)
2016 {
2017 unsigned int r_type;
2018
2019 /* Initialize howto table if not already done. */
2020 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2021 ppc_elf_howto_init ();
2022
2023 r_type = ELF32_R_TYPE (dst->r_info);
2024 if (r_type >= R_PPC_max)
2025 {
2026 /* xgettext:c-format */
2027 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2028 abfd, r_type);
2029 bfd_set_error (bfd_error_bad_value);
2030 r_type = R_PPC_NONE;
2031 }
2032 cache_ptr->howto = ppc_elf_howto_table[r_type];
2033
2034 /* Just because the above assert didn't trigger doesn't mean that
2035 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2036 if (!cache_ptr->howto)
2037 {
2038 /* xgettext:c-format */
2039 _bfd_error_handler (_("%B: invalid relocation type %d"),
2040 abfd, r_type);
2041 bfd_set_error (bfd_error_bad_value);
2042
2043 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2044 }
2045 }
2046
2047 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2048
2049 static bfd_reloc_status_type
2050 ppc_elf_addr16_ha_reloc (bfd *abfd,
2051 arelent *reloc_entry,
2052 asymbol *symbol,
2053 void *data,
2054 asection *input_section,
2055 bfd *output_bfd,
2056 char **error_message ATTRIBUTE_UNUSED)
2057 {
2058 enum elf_ppc_reloc_type r_type;
2059 long insn;
2060 bfd_size_type octets;
2061 bfd_vma value;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 reloc_entry->addend += 0x8000;
2070 r_type = reloc_entry->howto->type;
2071 if (r_type != R_PPC_REL16DX_HA)
2072 return bfd_reloc_continue;
2073
2074 value = 0;
2075 if (!bfd_is_com_section (symbol->section))
2076 value = symbol->value;
2077 value += (reloc_entry->addend
2078 + symbol->section->output_offset
2079 + symbol->section->output_section->vma);
2080 value -= (reloc_entry->address
2081 + input_section->output_offset
2082 + input_section->output_section->vma);
2083 value >>= 16;
2084
2085 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2086 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2087 insn &= ~0x1fffc1;
2088 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2089 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2090 return bfd_reloc_ok;
2091 }
2092
2093 static bfd_reloc_status_type
2094 ppc_elf_unhandled_reloc (bfd *abfd,
2095 arelent *reloc_entry,
2096 asymbol *symbol,
2097 void *data,
2098 asection *input_section,
2099 bfd *output_bfd,
2100 char **error_message)
2101 {
2102 /* If this is a relocatable link (output_bfd test tells us), just
2103 call the generic function. Any adjustment will be done at final
2104 link time. */
2105 if (output_bfd != NULL)
2106 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2107 input_section, output_bfd, error_message);
2108
2109 if (error_message != NULL)
2110 {
2111 static char buf[60];
2112 sprintf (buf, _("generic linker can't handle %s"),
2113 reloc_entry->howto->name);
2114 *error_message = buf;
2115 }
2116 return bfd_reloc_dangerous;
2117 }
2118 \f
2119 /* Sections created by the linker. */
2120
2121 typedef struct elf_linker_section
2122 {
2123 /* Pointer to the bfd section. */
2124 asection *section;
2125 /* Section name. */
2126 const char *name;
2127 /* Associated bss section name. */
2128 const char *bss_name;
2129 /* Associated symbol name. */
2130 const char *sym_name;
2131 /* Associated symbol. */
2132 struct elf_link_hash_entry *sym;
2133 } elf_linker_section_t;
2134
2135 /* Linked list of allocated pointer entries. This hangs off of the
2136 symbol lists, and provides allows us to return different pointers,
2137 based on different addend's. */
2138
2139 typedef struct elf_linker_section_pointers
2140 {
2141 /* next allocated pointer for this symbol */
2142 struct elf_linker_section_pointers *next;
2143 /* offset of pointer from beginning of section */
2144 bfd_vma offset;
2145 /* addend used */
2146 bfd_vma addend;
2147 /* which linker section this is */
2148 elf_linker_section_t *lsect;
2149 } elf_linker_section_pointers_t;
2150
2151 struct ppc_elf_obj_tdata
2152 {
2153 struct elf_obj_tdata elf;
2154
2155 /* A mapping from local symbols to offsets into the various linker
2156 sections added. This is index by the symbol index. */
2157 elf_linker_section_pointers_t **linker_section_pointers;
2158
2159 /* Flags used to auto-detect plt type. */
2160 unsigned int makes_plt_call : 1;
2161 unsigned int has_rel16 : 1;
2162 };
2163
2164 #define ppc_elf_tdata(bfd) \
2165 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2166
2167 #define elf_local_ptr_offsets(bfd) \
2168 (ppc_elf_tdata (bfd)->linker_section_pointers)
2169
2170 #define is_ppc_elf(bfd) \
2171 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2172 && elf_object_id (bfd) == PPC32_ELF_DATA)
2173
2174 /* Override the generic function because we store some extras. */
2175
2176 static bfd_boolean
2177 ppc_elf_mkobject (bfd *abfd)
2178 {
2179 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2180 PPC32_ELF_DATA);
2181 }
2182
2183 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2184
2185 bfd_boolean
2186 _bfd_elf_ppc_set_arch (bfd *abfd)
2187 {
2188 unsigned long mach = 0;
2189 asection *s;
2190 unsigned char *contents;
2191
2192 if (abfd->arch_info->bits_per_word == 32
2193 && bfd_big_endian (abfd))
2194 {
2195
2196 for (s = abfd->sections; s != NULL; s = s->next)
2197 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2198 break;
2199 if (s != NULL)
2200 mach = bfd_mach_ppc_vle;
2201 }
2202
2203 if (mach == 0)
2204 {
2205 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2206 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2207 {
2208 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2209 unsigned int i;
2210
2211 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2212 {
2213 unsigned int val = bfd_get_32 (abfd, contents + i);
2214 switch (val >> 16)
2215 {
2216 case PPC_APUINFO_PMR:
2217 case PPC_APUINFO_RFMCI:
2218 if (mach == 0)
2219 mach = bfd_mach_ppc_titan;
2220 break;
2221
2222 case PPC_APUINFO_ISEL:
2223 case PPC_APUINFO_CACHELCK:
2224 if (mach == bfd_mach_ppc_titan)
2225 mach = bfd_mach_ppc_e500mc;
2226 break;
2227
2228 case PPC_APUINFO_SPE:
2229 case PPC_APUINFO_EFS:
2230 case PPC_APUINFO_BRLOCK:
2231 if (mach != bfd_mach_ppc_vle)
2232 mach = bfd_mach_ppc_e500;
2233 break;
2234
2235 case PPC_APUINFO_VLE:
2236 mach = bfd_mach_ppc_vle;
2237 break;
2238
2239 default:
2240 mach = -1ul;
2241 }
2242 }
2243 free (contents);
2244 }
2245 }
2246
2247 if (mach != 0 && mach != -1ul)
2248 {
2249 const bfd_arch_info_type *arch;
2250
2251 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2252 if (arch->mach == mach)
2253 {
2254 abfd->arch_info = arch;
2255 break;
2256 }
2257 }
2258 return TRUE;
2259 }
2260
2261 /* Fix bad default arch selected for a 32 bit input bfd when the
2262 default is 64 bit. Also select arch based on apuinfo. */
2263
2264 static bfd_boolean
2265 ppc_elf_object_p (bfd *abfd)
2266 {
2267 if (!abfd->arch_info->the_default)
2268 return TRUE;
2269
2270 if (abfd->arch_info->bits_per_word == 64)
2271 {
2272 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2273
2274 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2275 {
2276 /* Relies on arch after 64 bit default being 32 bit default. */
2277 abfd->arch_info = abfd->arch_info->next;
2278 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2279 }
2280 }
2281 return _bfd_elf_ppc_set_arch (abfd);
2282 }
2283
2284 /* Function to set whether a module needs the -mrelocatable bit set. */
2285
2286 static bfd_boolean
2287 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2288 {
2289 BFD_ASSERT (!elf_flags_init (abfd)
2290 || elf_elfheader (abfd)->e_flags == flags);
2291
2292 elf_elfheader (abfd)->e_flags = flags;
2293 elf_flags_init (abfd) = TRUE;
2294 return TRUE;
2295 }
2296
2297 /* Support for core dump NOTE sections. */
2298
2299 static bfd_boolean
2300 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2301 {
2302 int offset;
2303 unsigned int size;
2304
2305 switch (note->descsz)
2306 {
2307 default:
2308 return FALSE;
2309
2310 case 268: /* Linux/PPC. */
2311 /* pr_cursig */
2312 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2313
2314 /* pr_pid */
2315 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2316
2317 /* pr_reg */
2318 offset = 72;
2319 size = 192;
2320
2321 break;
2322 }
2323
2324 /* Make a ".reg/999" section. */
2325 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2326 size, note->descpos + offset);
2327 }
2328
2329 static bfd_boolean
2330 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2331 {
2332 switch (note->descsz)
2333 {
2334 default:
2335 return FALSE;
2336
2337 case 128: /* Linux/PPC elf_prpsinfo. */
2338 elf_tdata (abfd)->core->pid
2339 = bfd_get_32 (abfd, note->descdata + 16);
2340 elf_tdata (abfd)->core->program
2341 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2342 elf_tdata (abfd)->core->command
2343 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2344 }
2345
2346 /* Note that for some reason, a spurious space is tacked
2347 onto the end of the args in some (at least one anyway)
2348 implementations, so strip it off if it exists. */
2349
2350 {
2351 char *command = elf_tdata (abfd)->core->command;
2352 int n = strlen (command);
2353
2354 if (0 < n && command[n - 1] == ' ')
2355 command[n - 1] = '\0';
2356 }
2357
2358 return TRUE;
2359 }
2360
2361 static char *
2362 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2363 {
2364 switch (note_type)
2365 {
2366 default:
2367 return NULL;
2368
2369 case NT_PRPSINFO:
2370 {
2371 char data[128];
2372 va_list ap;
2373
2374 va_start (ap, note_type);
2375 memset (data, 0, sizeof (data));
2376 strncpy (data + 32, va_arg (ap, const char *), 16);
2377 strncpy (data + 48, va_arg (ap, const char *), 80);
2378 va_end (ap);
2379 return elfcore_write_note (abfd, buf, bufsiz,
2380 "CORE", note_type, data, sizeof (data));
2381 }
2382
2383 case NT_PRSTATUS:
2384 {
2385 char data[268];
2386 va_list ap;
2387 long pid;
2388 int cursig;
2389 const void *greg;
2390
2391 va_start (ap, note_type);
2392 memset (data, 0, 72);
2393 pid = va_arg (ap, long);
2394 bfd_put_32 (abfd, pid, data + 24);
2395 cursig = va_arg (ap, int);
2396 bfd_put_16 (abfd, cursig, data + 12);
2397 greg = va_arg (ap, const void *);
2398 memcpy (data + 72, greg, 192);
2399 memset (data + 264, 0, 4);
2400 va_end (ap);
2401 return elfcore_write_note (abfd, buf, bufsiz,
2402 "CORE", note_type, data, sizeof (data));
2403 }
2404 }
2405 }
2406
2407 static flagword
2408 ppc_elf_lookup_section_flags (char *flag_name)
2409 {
2410
2411 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2412 return SHF_PPC_VLE;
2413
2414 return 0;
2415 }
2416
2417 /* Return address for Ith PLT stub in section PLT, for relocation REL
2418 or (bfd_vma) -1 if it should not be included. */
2419
2420 static bfd_vma
2421 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2422 const asection *plt ATTRIBUTE_UNUSED,
2423 const arelent *rel)
2424 {
2425 return rel->address;
2426 }
2427
2428 /* Handle a PowerPC specific section when reading an object file. This
2429 is called when bfd_section_from_shdr finds a section with an unknown
2430 type. */
2431
2432 static bfd_boolean
2433 ppc_elf_section_from_shdr (bfd *abfd,
2434 Elf_Internal_Shdr *hdr,
2435 const char *name,
2436 int shindex)
2437 {
2438 asection *newsect;
2439 flagword flags;
2440
2441 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2442 return FALSE;
2443
2444 newsect = hdr->bfd_section;
2445 flags = bfd_get_section_flags (abfd, newsect);
2446 if (hdr->sh_flags & SHF_EXCLUDE)
2447 flags |= SEC_EXCLUDE;
2448
2449 if (hdr->sh_type == SHT_ORDERED)
2450 flags |= SEC_SORT_ENTRIES;
2451
2452 bfd_set_section_flags (abfd, newsect, flags);
2453 return TRUE;
2454 }
2455
2456 /* Set up any other section flags and such that may be necessary. */
2457
2458 static bfd_boolean
2459 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2460 Elf_Internal_Shdr *shdr,
2461 asection *asect)
2462 {
2463 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2464 shdr->sh_type = SHT_ORDERED;
2465
2466 return TRUE;
2467 }
2468
2469 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2470 need to bump up the number of section headers. */
2471
2472 static int
2473 ppc_elf_additional_program_headers (bfd *abfd,
2474 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2475 {
2476 asection *s;
2477 int ret = 0;
2478
2479 s = bfd_get_section_by_name (abfd, ".sbss2");
2480 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2481 ++ret;
2482
2483 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2484 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2485 ++ret;
2486
2487 return ret;
2488 }
2489
2490 /* Modify the segment map for VLE executables. */
2491
2492 bfd_boolean
2493 ppc_elf_modify_segment_map (bfd *abfd,
2494 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2495 {
2496 struct elf_segment_map *m;
2497
2498 /* At this point in the link, output sections have already been sorted by
2499 LMA and assigned to segments. All that is left to do is to ensure
2500 there is no mixing of VLE & non-VLE sections in a text segment.
2501 If we find that case, we split the segment.
2502 We maintain the original output section order. */
2503
2504 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2505 {
2506 struct elf_segment_map *n;
2507 bfd_size_type amt;
2508 unsigned int j, k;
2509 unsigned int p_flags;
2510
2511 if (m->p_type != PT_LOAD || m->count == 0)
2512 continue;
2513
2514 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2515 {
2516 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2517 p_flags |= PF_W;
2518 if ((m->sections[j]->flags & SEC_CODE) != 0)
2519 {
2520 p_flags |= PF_X;
2521 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2522 p_flags |= PF_PPC_VLE;
2523 break;
2524 }
2525 }
2526 if (j != m->count)
2527 while (++j != m->count)
2528 {
2529 unsigned int p_flags1 = PF_R;
2530
2531 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2532 p_flags1 |= PF_W;
2533 if ((m->sections[j]->flags & SEC_CODE) != 0)
2534 {
2535 p_flags1 |= PF_X;
2536 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2537 p_flags1 |= PF_PPC_VLE;
2538 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2539 break;
2540 }
2541 p_flags |= p_flags1;
2542 }
2543 /* If we're splitting a segment which originally contained rw
2544 sections then those sections might now only be in one of the
2545 two parts. So always set p_flags if splitting, even if we
2546 are being called for objcopy with p_flags_valid set. */
2547 if (j != m->count || !m->p_flags_valid)
2548 {
2549 m->p_flags_valid = 1;
2550 m->p_flags = p_flags;
2551 }
2552 if (j == m->count)
2553 continue;
2554
2555 /* Sections 0..j-1 stay in this (current) segment,
2556 the remainder are put in a new segment.
2557 The scan resumes with the new segment. */
2558
2559 amt = sizeof (struct elf_segment_map);
2560 amt += (m->count - j - 1) * sizeof (asection *);
2561 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2562 if (n == NULL)
2563 return FALSE;
2564
2565 n->p_type = PT_LOAD;
2566 n->count = m->count - j;
2567 for (k = 0; k < n->count; ++k)
2568 n->sections[k] = m->sections[j + k];
2569 m->count = j;
2570 m->p_size_valid = 0;
2571 n->next = m->next;
2572 m->next = n;
2573 }
2574
2575 return TRUE;
2576 }
2577
2578 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2579 .PPC.EMB.sbss0 a normal section, and not a bss section so
2580 that the linker doesn't crater when trying to make more than
2581 2 sections. */
2582
2583 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2584 {
2585 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2586 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2587 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2588 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2590 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2591 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2592 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2593 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2594 { NULL, 0, 0, 0, 0 }
2595 };
2596
2597 /* This is what we want for new plt/got. */
2598 static struct bfd_elf_special_section ppc_alt_plt =
2599 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2600
2601 static const struct bfd_elf_special_section *
2602 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2603 {
2604 const struct bfd_elf_special_section *ssect;
2605
2606 /* See if this is one of the special sections. */
2607 if (sec->name == NULL)
2608 return NULL;
2609
2610 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2611 sec->use_rela_p);
2612 if (ssect != NULL)
2613 {
2614 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2615 ssect = &ppc_alt_plt;
2616 return ssect;
2617 }
2618
2619 return _bfd_elf_get_sec_type_attr (abfd, sec);
2620 }
2621 \f
2622 /* Very simple linked list structure for recording apuinfo values. */
2623 typedef struct apuinfo_list
2624 {
2625 struct apuinfo_list *next;
2626 unsigned long value;
2627 }
2628 apuinfo_list;
2629
2630 static apuinfo_list *head;
2631 static bfd_boolean apuinfo_set;
2632
2633 static void
2634 apuinfo_list_init (void)
2635 {
2636 head = NULL;
2637 apuinfo_set = FALSE;
2638 }
2639
2640 static void
2641 apuinfo_list_add (unsigned long value)
2642 {
2643 apuinfo_list *entry = head;
2644
2645 while (entry != NULL)
2646 {
2647 if (entry->value == value)
2648 return;
2649 entry = entry->next;
2650 }
2651
2652 entry = bfd_malloc (sizeof (* entry));
2653 if (entry == NULL)
2654 return;
2655
2656 entry->value = value;
2657 entry->next = head;
2658 head = entry;
2659 }
2660
2661 static unsigned
2662 apuinfo_list_length (void)
2663 {
2664 apuinfo_list *entry;
2665 unsigned long count;
2666
2667 for (entry = head, count = 0;
2668 entry;
2669 entry = entry->next)
2670 ++ count;
2671
2672 return count;
2673 }
2674
2675 static inline unsigned long
2676 apuinfo_list_element (unsigned long number)
2677 {
2678 apuinfo_list * entry;
2679
2680 for (entry = head;
2681 entry && number --;
2682 entry = entry->next)
2683 ;
2684
2685 return entry ? entry->value : 0;
2686 }
2687
2688 static void
2689 apuinfo_list_finish (void)
2690 {
2691 apuinfo_list *entry;
2692
2693 for (entry = head; entry;)
2694 {
2695 apuinfo_list *next = entry->next;
2696 free (entry);
2697 entry = next;
2698 }
2699
2700 head = NULL;
2701 }
2702
2703 /* Scan the input BFDs and create a linked list of
2704 the APUinfo values that will need to be emitted. */
2705
2706 static void
2707 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2708 {
2709 bfd *ibfd;
2710 asection *asec;
2711 char *buffer = NULL;
2712 bfd_size_type largest_input_size = 0;
2713 unsigned i;
2714 unsigned long length;
2715 const char *error_message = NULL;
2716
2717 if (link_info == NULL)
2718 return;
2719
2720 apuinfo_list_init ();
2721
2722 /* Read in the input sections contents. */
2723 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2724 {
2725 unsigned long datum;
2726
2727 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2728 if (asec == NULL)
2729 continue;
2730
2731 /* xgettext:c-format */
2732 error_message = _("corrupt %s section in %B");
2733 length = asec->size;
2734 if (length < 20)
2735 goto fail;
2736
2737 apuinfo_set = TRUE;
2738 if (largest_input_size < asec->size)
2739 {
2740 if (buffer)
2741 free (buffer);
2742 largest_input_size = asec->size;
2743 buffer = bfd_malloc (largest_input_size);
2744 if (!buffer)
2745 return;
2746 }
2747
2748 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2749 || (bfd_bread (buffer, length, ibfd) != length))
2750 {
2751 /* xgettext:c-format */
2752 error_message = _("unable to read in %s section from %B");
2753 goto fail;
2754 }
2755
2756 /* Verify the contents of the header. Note - we have to
2757 extract the values this way in order to allow for a
2758 host whose endian-ness is different from the target. */
2759 datum = bfd_get_32 (ibfd, buffer);
2760 if (datum != sizeof APUINFO_LABEL)
2761 goto fail;
2762
2763 datum = bfd_get_32 (ibfd, buffer + 8);
2764 if (datum != 0x2)
2765 goto fail;
2766
2767 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2768 goto fail;
2769
2770 /* Get the number of bytes used for apuinfo entries. */
2771 datum = bfd_get_32 (ibfd, buffer + 4);
2772 if (datum + 20 != length)
2773 goto fail;
2774
2775 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2776 for (i = 0; i < datum; i += 4)
2777 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2778 }
2779
2780 error_message = NULL;
2781
2782 if (apuinfo_set)
2783 {
2784 /* Compute the size of the output section. */
2785 unsigned num_entries = apuinfo_list_length ();
2786
2787 /* Set the output section size, if it exists. */
2788 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2789
2790 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2791 {
2792 ibfd = abfd;
2793 /* xgettext:c-format */
2794 error_message = _("warning: unable to set size of %s section in %B");
2795 }
2796 }
2797
2798 fail:
2799 if (buffer)
2800 free (buffer);
2801
2802 if (error_message)
2803 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2804 }
2805
2806 /* Prevent the output section from accumulating the input sections'
2807 contents. We have already stored this in our linked list structure. */
2808
2809 static bfd_boolean
2810 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2811 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2812 asection *asec,
2813 bfd_byte *contents ATTRIBUTE_UNUSED)
2814 {
2815 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2816 }
2817
2818 /* Finally we can generate the output section. */
2819
2820 static void
2821 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2822 {
2823 bfd_byte *buffer;
2824 asection *asec;
2825 unsigned i;
2826 unsigned num_entries;
2827 bfd_size_type length;
2828
2829 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2830 if (asec == NULL)
2831 return;
2832
2833 if (!apuinfo_set)
2834 return;
2835
2836 length = asec->size;
2837 if (length < 20)
2838 return;
2839
2840 buffer = bfd_malloc (length);
2841 if (buffer == NULL)
2842 {
2843 _bfd_error_handler
2844 (_("failed to allocate space for new APUinfo section."));
2845 return;
2846 }
2847
2848 /* Create the apuinfo header. */
2849 num_entries = apuinfo_list_length ();
2850 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2851 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2852 bfd_put_32 (abfd, 0x2, buffer + 8);
2853 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2854
2855 length = 20;
2856 for (i = 0; i < num_entries; i++)
2857 {
2858 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2859 length += 4;
2860 }
2861
2862 if (length != asec->size)
2863 _bfd_error_handler (_("failed to compute new APUinfo section."));
2864
2865 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2866 _bfd_error_handler (_("failed to install new APUinfo section."));
2867
2868 free (buffer);
2869
2870 apuinfo_list_finish ();
2871 }
2872 \f
2873 static bfd_boolean
2874 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2875 {
2876 bfd_byte buf[GLINK_ENTRY_SIZE];
2877
2878 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2879 return FALSE;
2880
2881 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2882 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2883 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2884 && bfd_get_32 (abfd, buf + 12) == BCTR);
2885 }
2886
2887 static bfd_boolean
2888 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2889 {
2890 bfd_vma vma = *(bfd_vma *) ptr;
2891 return ((section->flags & SEC_ALLOC) != 0
2892 && section->vma <= vma
2893 && vma < section->vma + section->size);
2894 }
2895
2896 static long
2897 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2898 long dynsymcount, asymbol **dynsyms,
2899 asymbol **ret)
2900 {
2901 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2902 asection *plt, *relplt, *dynamic, *glink;
2903 bfd_vma glink_vma = 0;
2904 bfd_vma resolv_vma = 0;
2905 bfd_vma stub_vma;
2906 asymbol *s;
2907 arelent *p;
2908 long count, i;
2909 size_t size;
2910 char *names;
2911 bfd_byte buf[4];
2912
2913 *ret = NULL;
2914
2915 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2916 return 0;
2917
2918 if (dynsymcount <= 0)
2919 return 0;
2920
2921 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2922 if (relplt == NULL)
2923 return 0;
2924
2925 plt = bfd_get_section_by_name (abfd, ".plt");
2926 if (plt == NULL)
2927 return 0;
2928
2929 /* Call common code to handle old-style executable PLTs. */
2930 if (elf_section_flags (plt) & SHF_EXECINSTR)
2931 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2932 dynsymcount, dynsyms, ret);
2933
2934 /* If this object was prelinked, the prelinker stored the address
2935 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2936 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2937 if (dynamic != NULL)
2938 {
2939 bfd_byte *dynbuf, *extdyn, *extdynend;
2940 size_t extdynsize;
2941 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2942
2943 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2944 return -1;
2945
2946 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2947 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2948
2949 extdyn = dynbuf;
2950 extdynend = extdyn + dynamic->size;
2951 for (; extdyn < extdynend; extdyn += extdynsize)
2952 {
2953 Elf_Internal_Dyn dyn;
2954 (*swap_dyn_in) (abfd, extdyn, &dyn);
2955
2956 if (dyn.d_tag == DT_NULL)
2957 break;
2958
2959 if (dyn.d_tag == DT_PPC_GOT)
2960 {
2961 unsigned int g_o_t = dyn.d_un.d_val;
2962 asection *got = bfd_get_section_by_name (abfd, ".got");
2963 if (got != NULL
2964 && bfd_get_section_contents (abfd, got, buf,
2965 g_o_t - got->vma + 4, 4))
2966 glink_vma = bfd_get_32 (abfd, buf);
2967 break;
2968 }
2969 }
2970 free (dynbuf);
2971 }
2972
2973 /* Otherwise we read the first plt entry. */
2974 if (glink_vma == 0)
2975 {
2976 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2977 glink_vma = bfd_get_32 (abfd, buf);
2978 }
2979
2980 if (glink_vma == 0)
2981 return 0;
2982
2983 /* The .glink section usually does not survive the final
2984 link; search for the section (usually .text) where the
2985 glink stubs now reside. */
2986 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2987 if (glink == NULL)
2988 return 0;
2989
2990 /* Determine glink PLT resolver by reading the relative branch
2991 from the first glink stub. */
2992 if (bfd_get_section_contents (abfd, glink, buf,
2993 glink_vma - glink->vma, 4))
2994 {
2995 unsigned int insn = bfd_get_32 (abfd, buf);
2996
2997 /* The first glink stub may either branch to the resolver ... */
2998 insn ^= B;
2999 if ((insn & ~0x3fffffc) == 0)
3000 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3001
3002 /* ... or fall through a bunch of NOPs. */
3003 else if ((insn ^ B ^ NOP) == 0)
3004 for (i = 4;
3005 bfd_get_section_contents (abfd, glink, buf,
3006 glink_vma - glink->vma + i, 4);
3007 i += 4)
3008 if (bfd_get_32 (abfd, buf) != NOP)
3009 {
3010 resolv_vma = glink_vma + i;
3011 break;
3012 }
3013 }
3014
3015 count = relplt->size / sizeof (Elf32_External_Rela);
3016 /* If the stubs are those for -shared/-pie then we might have
3017 multiple stubs for each plt entry. If that is the case then
3018 there is no way to associate stubs with their plt entries short
3019 of figuring out the GOT pointer value used in the stub. */
3020 if (!is_nonpic_glink_stub (abfd, glink,
3021 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3022 return 0;
3023
3024 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3025 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3026 return -1;
3027
3028 size = count * sizeof (asymbol);
3029 p = relplt->relocation;
3030 for (i = 0; i < count; i++, p++)
3031 {
3032 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3033 if (p->addend != 0)
3034 size += sizeof ("+0x") - 1 + 8;
3035 }
3036
3037 size += sizeof (asymbol) + sizeof ("__glink");
3038
3039 if (resolv_vma)
3040 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3041
3042 s = *ret = bfd_malloc (size);
3043 if (s == NULL)
3044 return -1;
3045
3046 stub_vma = glink_vma;
3047 names = (char *) (s + count + 1 + (resolv_vma != 0));
3048 p = relplt->relocation + count - 1;
3049 for (i = 0; i < count; i++)
3050 {
3051 size_t len;
3052
3053 *s = **p->sym_ptr_ptr;
3054 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3055 we are defining a symbol, ensure one of them is set. */
3056 if ((s->flags & BSF_LOCAL) == 0)
3057 s->flags |= BSF_GLOBAL;
3058 s->flags |= BSF_SYNTHETIC;
3059 s->section = glink;
3060 stub_vma -= 16;
3061 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3062 stub_vma -= 32;
3063 s->value = stub_vma - glink->vma;
3064 s->name = names;
3065 s->udata.p = NULL;
3066 len = strlen ((*p->sym_ptr_ptr)->name);
3067 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3068 names += len;
3069 if (p->addend != 0)
3070 {
3071 memcpy (names, "+0x", sizeof ("+0x") - 1);
3072 names += sizeof ("+0x") - 1;
3073 bfd_sprintf_vma (abfd, names, p->addend);
3074 names += strlen (names);
3075 }
3076 memcpy (names, "@plt", sizeof ("@plt"));
3077 names += sizeof ("@plt");
3078 ++s;
3079 --p;
3080 }
3081
3082 /* Add a symbol at the start of the glink branch table. */
3083 memset (s, 0, sizeof *s);
3084 s->the_bfd = abfd;
3085 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3086 s->section = glink;
3087 s->value = glink_vma - glink->vma;
3088 s->name = names;
3089 memcpy (names, "__glink", sizeof ("__glink"));
3090 names += sizeof ("__glink");
3091 s++;
3092 count++;
3093
3094 if (resolv_vma)
3095 {
3096 /* Add a symbol for the glink PLT resolver. */
3097 memset (s, 0, sizeof *s);
3098 s->the_bfd = abfd;
3099 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3100 s->section = glink;
3101 s->value = resolv_vma - glink->vma;
3102 s->name = names;
3103 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3104 names += sizeof ("__glink_PLTresolve");
3105 s++;
3106 count++;
3107 }
3108
3109 return count;
3110 }
3111 \f
3112 /* The following functions are specific to the ELF linker, while
3113 functions above are used generally. They appear in this file more
3114 or less in the order in which they are called. eg.
3115 ppc_elf_check_relocs is called early in the link process,
3116 ppc_elf_finish_dynamic_sections is one of the last functions
3117 called. */
3118
3119 /* Track PLT entries needed for a given symbol. We might need more
3120 than one glink entry per symbol when generating a pic binary. */
3121 struct plt_entry
3122 {
3123 struct plt_entry *next;
3124
3125 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3126 This field stores the offset into .got2 used to initialise the
3127 GOT pointer reg. It will always be at least 32768. (Current
3128 gcc always uses an offset of 32768, but ld -r will pack .got2
3129 sections together resulting in larger offsets). */
3130 bfd_vma addend;
3131
3132 /* The .got2 section. */
3133 asection *sec;
3134
3135 /* PLT refcount or offset. */
3136 union
3137 {
3138 bfd_signed_vma refcount;
3139 bfd_vma offset;
3140 } plt;
3141
3142 /* .glink stub offset. */
3143 bfd_vma glink_offset;
3144 };
3145
3146 /* Of those relocs that might be copied as dynamic relocs, this
3147 function selects those that must be copied when linking a shared
3148 library or PIE, even when the symbol is local. */
3149
3150 static int
3151 must_be_dyn_reloc (struct bfd_link_info *info,
3152 enum elf_ppc_reloc_type r_type)
3153 {
3154 switch (r_type)
3155 {
3156 default:
3157 /* Only relative relocs can be resolved when the object load
3158 address isn't fixed. DTPREL32 is excluded because the
3159 dynamic linker needs to differentiate global dynamic from
3160 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3161 return 1;
3162
3163 case R_PPC_REL24:
3164 case R_PPC_REL14:
3165 case R_PPC_REL14_BRTAKEN:
3166 case R_PPC_REL14_BRNTAKEN:
3167 case R_PPC_REL32:
3168 return 0;
3169
3170 case R_PPC_TPREL32:
3171 case R_PPC_TPREL16:
3172 case R_PPC_TPREL16_LO:
3173 case R_PPC_TPREL16_HI:
3174 case R_PPC_TPREL16_HA:
3175 /* These relocations are relative but in a shared library the
3176 linker doesn't know the thread pointer base. */
3177 return bfd_link_dll (info);
3178 }
3179 }
3180
3181 /* Whether an undefined weak symbol should resolve to its link-time
3182 value, even in PIC or PIE objects. */
3183 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3184 ((H)->root.type == bfd_link_hash_undefweak \
3185 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3186 || (INFO)->dynamic_undefined_weak == 0))
3187
3188 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3189 copying dynamic variables from a shared lib into an app's dynbss
3190 section, and instead use a dynamic relocation to point into the
3191 shared lib. */
3192 #define ELIMINATE_COPY_RELOCS 1
3193
3194 /* Used to track dynamic relocations for local symbols. */
3195 struct ppc_dyn_relocs
3196 {
3197 struct ppc_dyn_relocs *next;
3198
3199 /* The input section of the reloc. */
3200 asection *sec;
3201
3202 /* Total number of relocs copied for the input section. */
3203 unsigned int count : 31;
3204
3205 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3206 unsigned int ifunc : 1;
3207 };
3208
3209 /* PPC ELF linker hash entry. */
3210
3211 struct ppc_elf_link_hash_entry
3212 {
3213 struct elf_link_hash_entry elf;
3214
3215 /* If this symbol is used in the linker created sections, the processor
3216 specific backend uses this field to map the field into the offset
3217 from the beginning of the section. */
3218 elf_linker_section_pointers_t *linker_section_pointer;
3219
3220 /* Track dynamic relocs copied for this symbol. */
3221 struct elf_dyn_relocs *dyn_relocs;
3222
3223 /* Contexts in which symbol is used in the GOT (or TOC).
3224 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3225 corresponding relocs are encountered during check_relocs.
3226 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3227 indicate the corresponding GOT entry type is not needed. */
3228 #define TLS_GD 1 /* GD reloc. */
3229 #define TLS_LD 2 /* LD reloc. */
3230 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3231 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3232 #define TLS_TLS 16 /* Any TLS reloc. */
3233 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3234 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3235 char tls_mask;
3236
3237 /* Nonzero if we have seen a small data relocation referring to this
3238 symbol. */
3239 unsigned char has_sda_refs : 1;
3240
3241 /* Flag use of given relocations. */
3242 unsigned char has_addr16_ha : 1;
3243 unsigned char has_addr16_lo : 1;
3244 };
3245
3246 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3247
3248 /* PPC ELF linker hash table. */
3249
3250 struct ppc_elf_link_hash_table
3251 {
3252 struct elf_link_hash_table elf;
3253
3254 /* Various options passed from the linker. */
3255 struct ppc_elf_params *params;
3256
3257 /* Short-cuts to get to dynamic linker sections. */
3258 asection *glink;
3259 asection *dynsbss;
3260 asection *relsbss;
3261 elf_linker_section_t sdata[2];
3262 asection *sbss;
3263 asection *glink_eh_frame;
3264
3265 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3266 asection *srelplt2;
3267
3268 /* Shortcut to __tls_get_addr. */
3269 struct elf_link_hash_entry *tls_get_addr;
3270
3271 /* The bfd that forced an old-style PLT. */
3272 bfd *old_bfd;
3273
3274 /* TLS local dynamic got entry handling. */
3275 union {
3276 bfd_signed_vma refcount;
3277 bfd_vma offset;
3278 } tlsld_got;
3279
3280 /* Offset of branch table to PltResolve function in glink. */
3281 bfd_vma glink_pltresolve;
3282
3283 /* Size of reserved GOT entries. */
3284 unsigned int got_header_size;
3285 /* Non-zero if allocating the header left a gap. */
3286 unsigned int got_gap;
3287
3288 /* The type of PLT we have chosen to use. */
3289 enum ppc_elf_plt_type plt_type;
3290
3291 /* True if the target system is VxWorks. */
3292 unsigned int is_vxworks:1;
3293
3294 /* Whether there exist local gnu indirect function resolvers,
3295 referenced by dynamic relocations. */
3296 unsigned int local_ifunc_resolver:1;
3297 unsigned int maybe_local_ifunc_resolver:1;
3298
3299 /* Set if tls optimization is enabled. */
3300 unsigned int do_tls_opt:1;
3301
3302 /* The size of PLT entries. */
3303 int plt_entry_size;
3304 /* The distance between adjacent PLT slots. */
3305 int plt_slot_size;
3306 /* The size of the first PLT entry. */
3307 int plt_initial_entry_size;
3308
3309 /* Small local sym cache. */
3310 struct sym_cache sym_cache;
3311 };
3312
3313 /* Rename some of the generic section flags to better document how they
3314 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3315
3316 /* Nonzero if this section has TLS related relocations. */
3317 #define has_tls_reloc sec_flg0
3318
3319 /* Nonzero if this section has a call to __tls_get_addr. */
3320 #define has_tls_get_addr_call sec_flg1
3321
3322 /* Get the PPC ELF linker hash table from a link_info structure. */
3323
3324 #define ppc_elf_hash_table(p) \
3325 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3326 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3327
3328 /* Create an entry in a PPC ELF linker hash table. */
3329
3330 static struct bfd_hash_entry *
3331 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3332 struct bfd_hash_table *table,
3333 const char *string)
3334 {
3335 /* Allocate the structure if it has not already been allocated by a
3336 subclass. */
3337 if (entry == NULL)
3338 {
3339 entry = bfd_hash_allocate (table,
3340 sizeof (struct ppc_elf_link_hash_entry));
3341 if (entry == NULL)
3342 return entry;
3343 }
3344
3345 /* Call the allocation method of the superclass. */
3346 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3347 if (entry != NULL)
3348 {
3349 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3350 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3351 ppc_elf_hash_entry (entry)->tls_mask = 0;
3352 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3353 }
3354
3355 return entry;
3356 }
3357
3358 /* Create a PPC ELF linker hash table. */
3359
3360 static struct bfd_link_hash_table *
3361 ppc_elf_link_hash_table_create (bfd *abfd)
3362 {
3363 struct ppc_elf_link_hash_table *ret;
3364 static struct ppc_elf_params default_params
3365 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3366
3367 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3368 if (ret == NULL)
3369 return NULL;
3370
3371 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3372 ppc_elf_link_hash_newfunc,
3373 sizeof (struct ppc_elf_link_hash_entry),
3374 PPC32_ELF_DATA))
3375 {
3376 free (ret);
3377 return NULL;
3378 }
3379
3380 ret->elf.init_plt_refcount.refcount = 0;
3381 ret->elf.init_plt_refcount.glist = NULL;
3382 ret->elf.init_plt_offset.offset = 0;
3383 ret->elf.init_plt_offset.glist = NULL;
3384
3385 ret->params = &default_params;
3386
3387 ret->sdata[0].name = ".sdata";
3388 ret->sdata[0].sym_name = "_SDA_BASE_";
3389 ret->sdata[0].bss_name = ".sbss";
3390
3391 ret->sdata[1].name = ".sdata2";
3392 ret->sdata[1].sym_name = "_SDA2_BASE_";
3393 ret->sdata[1].bss_name = ".sbss2";
3394
3395 ret->plt_entry_size = 12;
3396 ret->plt_slot_size = 8;
3397 ret->plt_initial_entry_size = 72;
3398
3399 return &ret->elf.root;
3400 }
3401
3402 /* Hook linker params into hash table. */
3403
3404 void
3405 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3406 {
3407 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3408
3409 if (htab)
3410 htab->params = params;
3411 params->pagesize_p2 = bfd_log2 (params->pagesize);
3412 }
3413
3414 /* Create .got and the related sections. */
3415
3416 static bfd_boolean
3417 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3418 {
3419 struct ppc_elf_link_hash_table *htab;
3420
3421 if (!_bfd_elf_create_got_section (abfd, info))
3422 return FALSE;
3423
3424 htab = ppc_elf_hash_table (info);
3425 if (!htab->is_vxworks)
3426 {
3427 /* The powerpc .got has a blrl instruction in it. Mark it
3428 executable. */
3429 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3430 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3431 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3432 return FALSE;
3433 }
3434
3435 return TRUE;
3436 }
3437
3438 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3439 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3440 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3441
3442 static bfd_boolean
3443 ppc_elf_create_linker_section (bfd *abfd,
3444 struct bfd_link_info *info,
3445 flagword flags,
3446 elf_linker_section_t *lsect)
3447 {
3448 asection *s;
3449
3450 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3451 | SEC_LINKER_CREATED);
3452
3453 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3454 if (s == NULL)
3455 return FALSE;
3456 lsect->section = s;
3457
3458 /* Define the sym on the first section of this name. */
3459 s = bfd_get_section_by_name (abfd, lsect->name);
3460
3461 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3462 if (lsect->sym == NULL)
3463 return FALSE;
3464 lsect->sym->root.u.def.value = 0x8000;
3465 return TRUE;
3466 }
3467
3468 static bfd_boolean
3469 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3470 {
3471 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3472 asection *s;
3473 flagword flags;
3474
3475 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3476 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3477 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3478 htab->glink = s;
3479 if (s == NULL
3480 || !bfd_set_section_alignment (abfd, s,
3481 htab->params->ppc476_workaround ? 6 : 4))
3482 return FALSE;
3483
3484 if (!info->no_ld_generated_unwind_info)
3485 {
3486 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3487 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3488 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3489 htab->glink_eh_frame = s;
3490 if (s == NULL
3491 || !bfd_set_section_alignment (abfd, s, 2))
3492 return FALSE;
3493 }
3494
3495 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3496 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3497 htab->elf.iplt = s;
3498 if (s == NULL
3499 || !bfd_set_section_alignment (abfd, s, 4))
3500 return FALSE;
3501
3502 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3503 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3504 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3505 htab->elf.irelplt = s;
3506 if (s == NULL
3507 || ! bfd_set_section_alignment (abfd, s, 2))
3508 return FALSE;
3509
3510 if (!ppc_elf_create_linker_section (abfd, info, 0,
3511 &htab->sdata[0]))
3512 return FALSE;
3513
3514 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3515 &htab->sdata[1]))
3516 return FALSE;
3517
3518 return TRUE;
3519 }
3520
3521 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3522 to output sections (just like _bfd_elf_create_dynamic_sections has
3523 to create .dynbss and .rela.bss). */
3524
3525 static bfd_boolean
3526 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3527 {
3528 struct ppc_elf_link_hash_table *htab;
3529 asection *s;
3530 flagword flags;
3531
3532 htab = ppc_elf_hash_table (info);
3533
3534 if (htab->elf.sgot == NULL
3535 && !ppc_elf_create_got (abfd, info))
3536 return FALSE;
3537
3538 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3539 return FALSE;
3540
3541 if (htab->glink == NULL
3542 && !ppc_elf_create_glink (abfd, info))
3543 return FALSE;
3544
3545 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3546 SEC_ALLOC | SEC_LINKER_CREATED);
3547 htab->dynsbss = s;
3548 if (s == NULL)
3549 return FALSE;
3550
3551 if (! bfd_link_pic (info))
3552 {
3553 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3554 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3555 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3556 htab->relsbss = s;
3557 if (s == NULL
3558 || ! bfd_set_section_alignment (abfd, s, 2))
3559 return FALSE;
3560 }
3561
3562 if (htab->is_vxworks
3563 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3564 return FALSE;
3565
3566 s = htab->elf.splt;
3567 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3568 if (htab->plt_type == PLT_VXWORKS)
3569 /* The VxWorks PLT is a loaded section with contents. */
3570 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3571 return bfd_set_section_flags (abfd, s, flags);
3572 }
3573
3574 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3575
3576 static void
3577 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3578 struct elf_link_hash_entry *dir,
3579 struct elf_link_hash_entry *ind)
3580 {
3581 struct ppc_elf_link_hash_entry *edir, *eind;
3582
3583 edir = (struct ppc_elf_link_hash_entry *) dir;
3584 eind = (struct ppc_elf_link_hash_entry *) ind;
3585
3586 edir->tls_mask |= eind->tls_mask;
3587 edir->has_sda_refs |= eind->has_sda_refs;
3588
3589 /* If called to transfer flags for a weakdef during processing
3590 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3591 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3592 if (!(ELIMINATE_COPY_RELOCS
3593 && eind->elf.root.type != bfd_link_hash_indirect
3594 && edir->elf.dynamic_adjusted))
3595 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3596
3597 if (edir->elf.versioned != versioned_hidden)
3598 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3599 edir->elf.ref_regular |= eind->elf.ref_regular;
3600 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3601 edir->elf.needs_plt |= eind->elf.needs_plt;
3602 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3603
3604 if (eind->dyn_relocs != NULL)
3605 {
3606 if (edir->dyn_relocs != NULL)
3607 {
3608 struct elf_dyn_relocs **pp;
3609 struct elf_dyn_relocs *p;
3610
3611 /* Add reloc counts against the indirect sym to the direct sym
3612 list. Merge any entries against the same section. */
3613 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3614 {
3615 struct elf_dyn_relocs *q;
3616
3617 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3618 if (q->sec == p->sec)
3619 {
3620 q->pc_count += p->pc_count;
3621 q->count += p->count;
3622 *pp = p->next;
3623 break;
3624 }
3625 if (q == NULL)
3626 pp = &p->next;
3627 }
3628 *pp = edir->dyn_relocs;
3629 }
3630
3631 edir->dyn_relocs = eind->dyn_relocs;
3632 eind->dyn_relocs = NULL;
3633 }
3634
3635 /* If we were called to copy over info for a weak sym, that's all.
3636 You might think dyn_relocs need not be copied over; After all,
3637 both syms will be dynamic or both non-dynamic so we're just
3638 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3639 code in ppc_elf_adjust_dynamic_symbol needs to check for
3640 dyn_relocs in read-only sections, and it does so on what is the
3641 DIR sym here. */
3642 if (eind->elf.root.type != bfd_link_hash_indirect)
3643 return;
3644
3645 /* Copy over the GOT refcount entries that we may have already seen to
3646 the symbol which just became indirect. */
3647 edir->elf.got.refcount += eind->elf.got.refcount;
3648 eind->elf.got.refcount = 0;
3649
3650 /* And plt entries. */
3651 if (eind->elf.plt.plist != NULL)
3652 {
3653 if (edir->elf.plt.plist != NULL)
3654 {
3655 struct plt_entry **entp;
3656 struct plt_entry *ent;
3657
3658 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3659 {
3660 struct plt_entry *dent;
3661
3662 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3663 if (dent->sec == ent->sec && dent->addend == ent->addend)
3664 {
3665 dent->plt.refcount += ent->plt.refcount;
3666 *entp = ent->next;
3667 break;
3668 }
3669 if (dent == NULL)
3670 entp = &ent->next;
3671 }
3672 *entp = edir->elf.plt.plist;
3673 }
3674
3675 edir->elf.plt.plist = eind->elf.plt.plist;
3676 eind->elf.plt.plist = NULL;
3677 }
3678
3679 if (eind->elf.dynindx != -1)
3680 {
3681 if (edir->elf.dynindx != -1)
3682 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3683 edir->elf.dynstr_index);
3684 edir->elf.dynindx = eind->elf.dynindx;
3685 edir->elf.dynstr_index = eind->elf.dynstr_index;
3686 eind->elf.dynindx = -1;
3687 eind->elf.dynstr_index = 0;
3688 }
3689 }
3690
3691 /* Hook called by the linker routine which adds symbols from an object
3692 file. We use it to put .comm items in .sbss, and not .bss. */
3693
3694 static bfd_boolean
3695 ppc_elf_add_symbol_hook (bfd *abfd,
3696 struct bfd_link_info *info,
3697 Elf_Internal_Sym *sym,
3698 const char **namep ATTRIBUTE_UNUSED,
3699 flagword *flagsp ATTRIBUTE_UNUSED,
3700 asection **secp,
3701 bfd_vma *valp)
3702 {
3703 if (sym->st_shndx == SHN_COMMON
3704 && !bfd_link_relocatable (info)
3705 && is_ppc_elf (info->output_bfd)
3706 && sym->st_size <= elf_gp_size (abfd))
3707 {
3708 /* Common symbols less than or equal to -G nn bytes are automatically
3709 put into .sbss. */
3710 struct ppc_elf_link_hash_table *htab;
3711
3712 htab = ppc_elf_hash_table (info);
3713 if (htab->sbss == NULL)
3714 {
3715 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3716
3717 if (!htab->elf.dynobj)
3718 htab->elf.dynobj = abfd;
3719
3720 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3721 ".sbss",
3722 flags);
3723 if (htab->sbss == NULL)
3724 return FALSE;
3725 }
3726
3727 *secp = htab->sbss;
3728 *valp = sym->st_size;
3729 }
3730
3731 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3732 && (abfd->flags & DYNAMIC) == 0
3733 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3734 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3735
3736 return TRUE;
3737 }
3738 \f
3739 /* Find a linker generated pointer with a given addend and type. */
3740
3741 static elf_linker_section_pointers_t *
3742 elf_find_pointer_linker_section
3743 (elf_linker_section_pointers_t *linker_pointers,
3744 bfd_vma addend,
3745 elf_linker_section_t *lsect)
3746 {
3747 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3748 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3749 return linker_pointers;
3750
3751 return NULL;
3752 }
3753
3754 /* Allocate a pointer to live in a linker created section. */
3755
3756 static bfd_boolean
3757 elf_allocate_pointer_linker_section (bfd *abfd,
3758 elf_linker_section_t *lsect,
3759 struct elf_link_hash_entry *h,
3760 const Elf_Internal_Rela *rel)
3761 {
3762 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3763 elf_linker_section_pointers_t *linker_section_ptr;
3764 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3765 bfd_size_type amt;
3766
3767 BFD_ASSERT (lsect != NULL);
3768
3769 /* Is this a global symbol? */
3770 if (h != NULL)
3771 {
3772 struct ppc_elf_link_hash_entry *eh;
3773
3774 /* Has this symbol already been allocated? If so, our work is done. */
3775 eh = (struct ppc_elf_link_hash_entry *) h;
3776 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3777 rel->r_addend,
3778 lsect))
3779 return TRUE;
3780
3781 ptr_linker_section_ptr = &eh->linker_section_pointer;
3782 }
3783 else
3784 {
3785 BFD_ASSERT (is_ppc_elf (abfd));
3786
3787 /* Allocation of a pointer to a local symbol. */
3788 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3789
3790 /* Allocate a table to hold the local symbols if first time. */
3791 if (!ptr)
3792 {
3793 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3794
3795 amt = num_symbols;
3796 amt *= sizeof (elf_linker_section_pointers_t *);
3797 ptr = bfd_zalloc (abfd, amt);
3798
3799 if (!ptr)
3800 return FALSE;
3801
3802 elf_local_ptr_offsets (abfd) = ptr;
3803 }
3804
3805 /* Has this symbol already been allocated? If so, our work is done. */
3806 if (elf_find_pointer_linker_section (ptr[r_symndx],
3807 rel->r_addend,
3808 lsect))
3809 return TRUE;
3810
3811 ptr_linker_section_ptr = &ptr[r_symndx];
3812 }
3813
3814 /* Allocate space for a pointer in the linker section, and allocate
3815 a new pointer record from internal memory. */
3816 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3817 amt = sizeof (elf_linker_section_pointers_t);
3818 linker_section_ptr = bfd_alloc (abfd, amt);
3819
3820 if (!linker_section_ptr)
3821 return FALSE;
3822
3823 linker_section_ptr->next = *ptr_linker_section_ptr;
3824 linker_section_ptr->addend = rel->r_addend;
3825 linker_section_ptr->lsect = lsect;
3826 *ptr_linker_section_ptr = linker_section_ptr;
3827
3828 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3829 return FALSE;
3830 linker_section_ptr->offset = lsect->section->size;
3831 lsect->section->size += 4;
3832
3833 #ifdef DEBUG
3834 fprintf (stderr,
3835 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3836 lsect->name, (long) linker_section_ptr->offset,
3837 (long) lsect->section->size);
3838 #endif
3839
3840 return TRUE;
3841 }
3842
3843 static struct plt_entry **
3844 update_local_sym_info (bfd *abfd,
3845 Elf_Internal_Shdr *symtab_hdr,
3846 unsigned long r_symndx,
3847 int tls_type)
3848 {
3849 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3850 struct plt_entry **local_plt;
3851 char *local_got_tls_masks;
3852
3853 if (local_got_refcounts == NULL)
3854 {
3855 bfd_size_type size = symtab_hdr->sh_info;
3856
3857 size *= (sizeof (*local_got_refcounts)
3858 + sizeof (*local_plt)
3859 + sizeof (*local_got_tls_masks));
3860 local_got_refcounts = bfd_zalloc (abfd, size);
3861 if (local_got_refcounts == NULL)
3862 return NULL;
3863 elf_local_got_refcounts (abfd) = local_got_refcounts;
3864 }
3865
3866 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3867 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3868 local_got_tls_masks[r_symndx] |= tls_type;
3869 if (tls_type != PLT_IFUNC)
3870 local_got_refcounts[r_symndx] += 1;
3871 return local_plt + r_symndx;
3872 }
3873
3874 static bfd_boolean
3875 update_plt_info (bfd *abfd, struct plt_entry **plist,
3876 asection *sec, bfd_vma addend)
3877 {
3878 struct plt_entry *ent;
3879
3880 if (addend < 32768)
3881 sec = NULL;
3882 for (ent = *plist; ent != NULL; ent = ent->next)
3883 if (ent->sec == sec && ent->addend == addend)
3884 break;
3885 if (ent == NULL)
3886 {
3887 bfd_size_type amt = sizeof (*ent);
3888 ent = bfd_alloc (abfd, amt);
3889 if (ent == NULL)
3890 return FALSE;
3891 ent->next = *plist;
3892 ent->sec = sec;
3893 ent->addend = addend;
3894 ent->plt.refcount = 0;
3895 *plist = ent;
3896 }
3897 ent->plt.refcount += 1;
3898 return TRUE;
3899 }
3900
3901 static struct plt_entry *
3902 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3903 {
3904 struct plt_entry *ent;
3905
3906 if (addend < 32768)
3907 sec = NULL;
3908 for (ent = *plist; ent != NULL; ent = ent->next)
3909 if (ent->sec == sec && ent->addend == addend)
3910 break;
3911 return ent;
3912 }
3913
3914 static bfd_boolean
3915 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3916 {
3917 return (r_type == R_PPC_PLTREL24
3918 || r_type == R_PPC_LOCAL24PC
3919 || r_type == R_PPC_REL24
3920 || r_type == R_PPC_REL14
3921 || r_type == R_PPC_REL14_BRTAKEN
3922 || r_type == R_PPC_REL14_BRNTAKEN
3923 || r_type == R_PPC_ADDR24
3924 || r_type == R_PPC_ADDR14
3925 || r_type == R_PPC_ADDR14_BRTAKEN
3926 || r_type == R_PPC_ADDR14_BRNTAKEN
3927 || r_type == R_PPC_VLE_REL24);
3928 }
3929
3930 static void
3931 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3932 {
3933 _bfd_error_handler
3934 /* xgettext:c-format */
3935 (_("%B: relocation %s cannot be used when making a shared object"),
3936 abfd,
3937 ppc_elf_howto_table[r_type]->name);
3938 bfd_set_error (bfd_error_bad_value);
3939 }
3940
3941 /* Look through the relocs for a section during the first phase, and
3942 allocate space in the global offset table or procedure linkage
3943 table. */
3944
3945 static bfd_boolean
3946 ppc_elf_check_relocs (bfd *abfd,
3947 struct bfd_link_info *info,
3948 asection *sec,
3949 const Elf_Internal_Rela *relocs)
3950 {
3951 struct ppc_elf_link_hash_table *htab;
3952 Elf_Internal_Shdr *symtab_hdr;
3953 struct elf_link_hash_entry **sym_hashes;
3954 const Elf_Internal_Rela *rel;
3955 const Elf_Internal_Rela *rel_end;
3956 asection *got2, *sreloc;
3957 struct elf_link_hash_entry *tga;
3958
3959 if (bfd_link_relocatable (info))
3960 return TRUE;
3961
3962 /* Don't do anything special with non-loaded, non-alloced sections.
3963 In particular, any relocs in such sections should not affect GOT
3964 and PLT reference counting (ie. we don't allow them to create GOT
3965 or PLT entries), there's no possibility or desire to optimize TLS
3966 relocs, and there's not much point in propagating relocs to shared
3967 libs that the dynamic linker won't relocate. */
3968 if ((sec->flags & SEC_ALLOC) == 0)
3969 return TRUE;
3970
3971 #ifdef DEBUG
3972 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3973 sec, abfd);
3974 #endif
3975
3976 BFD_ASSERT (is_ppc_elf (abfd));
3977
3978 /* Initialize howto table if not already done. */
3979 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3980 ppc_elf_howto_init ();
3981
3982 htab = ppc_elf_hash_table (info);
3983 if (htab->glink == NULL)
3984 {
3985 if (htab->elf.dynobj == NULL)
3986 htab->elf.dynobj = abfd;
3987 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3988 return FALSE;
3989 }
3990 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3991 FALSE, FALSE, TRUE);
3992 symtab_hdr = &elf_symtab_hdr (abfd);
3993 sym_hashes = elf_sym_hashes (abfd);
3994 got2 = bfd_get_section_by_name (abfd, ".got2");
3995 sreloc = NULL;
3996
3997 rel_end = relocs + sec->reloc_count;
3998 for (rel = relocs; rel < rel_end; rel++)
3999 {
4000 unsigned long r_symndx;
4001 enum elf_ppc_reloc_type r_type;
4002 struct elf_link_hash_entry *h;
4003 int tls_type;
4004 struct plt_entry **ifunc;
4005
4006 r_symndx = ELF32_R_SYM (rel->r_info);
4007 if (r_symndx < symtab_hdr->sh_info)
4008 h = NULL;
4009 else
4010 {
4011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4012 while (h->root.type == bfd_link_hash_indirect
4013 || h->root.type == bfd_link_hash_warning)
4014 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4015
4016 /* PR15323, ref flags aren't set for references in the same
4017 object. */
4018 h->root.non_ir_ref_regular = 1;
4019 }
4020
4021 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4022 This shows up in particular in an R_PPC_ADDR32 in the eabi
4023 startup code. */
4024 if (h != NULL
4025 && htab->elf.sgot == NULL
4026 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4027 {
4028 if (htab->elf.dynobj == NULL)
4029 htab->elf.dynobj = abfd;
4030 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4031 return FALSE;
4032 BFD_ASSERT (h == htab->elf.hgot);
4033 }
4034
4035 tls_type = 0;
4036 r_type = ELF32_R_TYPE (rel->r_info);
4037 ifunc = NULL;
4038 if (h == NULL && !htab->is_vxworks)
4039 {
4040 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4041 abfd, r_symndx);
4042 if (isym == NULL)
4043 return FALSE;
4044
4045 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4046 {
4047 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4048 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4049 PLT_IFUNC);
4050 if (ifunc == NULL)
4051 return FALSE;
4052
4053 /* STT_GNU_IFUNC symbols must have a PLT entry;
4054 In a non-pie executable even when there are
4055 no plt calls. */
4056 if (!bfd_link_pic (info)
4057 || is_branch_reloc (r_type))
4058 {
4059 bfd_vma addend = 0;
4060 if (r_type == R_PPC_PLTREL24)
4061 {
4062 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4063 if (bfd_link_pic (info))
4064 addend = rel->r_addend;
4065 }
4066 if (!update_plt_info (abfd, ifunc, got2, addend))
4067 return FALSE;
4068 }
4069 }
4070 }
4071
4072 if (!htab->is_vxworks
4073 && is_branch_reloc (r_type)
4074 && h != NULL
4075 && h == tga)
4076 {
4077 if (rel != relocs
4078 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4079 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4080 /* We have a new-style __tls_get_addr call with a marker
4081 reloc. */
4082 ;
4083 else
4084 /* Mark this section as having an old-style call. */
4085 sec->has_tls_get_addr_call = 1;
4086 }
4087
4088 switch (r_type)
4089 {
4090 case R_PPC_TLSGD:
4091 case R_PPC_TLSLD:
4092 /* These special tls relocs tie a call to __tls_get_addr with
4093 its parameter symbol. */
4094 break;
4095
4096 case R_PPC_GOT_TLSLD16:
4097 case R_PPC_GOT_TLSLD16_LO:
4098 case R_PPC_GOT_TLSLD16_HI:
4099 case R_PPC_GOT_TLSLD16_HA:
4100 tls_type = TLS_TLS | TLS_LD;
4101 goto dogottls;
4102
4103 case R_PPC_GOT_TLSGD16:
4104 case R_PPC_GOT_TLSGD16_LO:
4105 case R_PPC_GOT_TLSGD16_HI:
4106 case R_PPC_GOT_TLSGD16_HA:
4107 tls_type = TLS_TLS | TLS_GD;
4108 goto dogottls;
4109
4110 case R_PPC_GOT_TPREL16:
4111 case R_PPC_GOT_TPREL16_LO:
4112 case R_PPC_GOT_TPREL16_HI:
4113 case R_PPC_GOT_TPREL16_HA:
4114 if (bfd_link_dll (info))
4115 info->flags |= DF_STATIC_TLS;
4116 tls_type = TLS_TLS | TLS_TPREL;
4117 goto dogottls;
4118
4119 case R_PPC_GOT_DTPREL16:
4120 case R_PPC_GOT_DTPREL16_LO:
4121 case R_PPC_GOT_DTPREL16_HI:
4122 case R_PPC_GOT_DTPREL16_HA:
4123 tls_type = TLS_TLS | TLS_DTPREL;
4124 dogottls:
4125 sec->has_tls_reloc = 1;
4126 /* Fall through. */
4127
4128 /* GOT16 relocations */
4129 case R_PPC_GOT16:
4130 case R_PPC_GOT16_LO:
4131 case R_PPC_GOT16_HI:
4132 case R_PPC_GOT16_HA:
4133 /* This symbol requires a global offset table entry. */
4134 if (htab->elf.sgot == NULL)
4135 {
4136 if (htab->elf.dynobj == NULL)
4137 htab->elf.dynobj = abfd;
4138 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4139 return FALSE;
4140 }
4141 if (h != NULL)
4142 {
4143 h->got.refcount += 1;
4144 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4145 }
4146 else
4147 /* This is a global offset table entry for a local symbol. */
4148 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4149 return FALSE;
4150
4151 /* We may also need a plt entry if the symbol turns out to be
4152 an ifunc. */
4153 if (h != NULL && !bfd_link_pic (info))
4154 {
4155 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4156 return FALSE;
4157 }
4158 break;
4159
4160 /* Indirect .sdata relocation. */
4161 case R_PPC_EMB_SDAI16:
4162 if (bfd_link_pic (info))
4163 {
4164 bad_shared_reloc (abfd, r_type);
4165 return FALSE;
4166 }
4167 htab->sdata[0].sym->ref_regular = 1;
4168 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4169 h, rel))
4170 return FALSE;
4171 if (h != NULL)
4172 {
4173 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4174 h->non_got_ref = TRUE;
4175 }
4176 break;
4177
4178 /* Indirect .sdata2 relocation. */
4179 case R_PPC_EMB_SDA2I16:
4180 if (bfd_link_pic (info))
4181 {
4182 bad_shared_reloc (abfd, r_type);
4183 return FALSE;
4184 }
4185 htab->sdata[1].sym->ref_regular = 1;
4186 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4187 h, rel))
4188 return FALSE;
4189 if (h != NULL)
4190 {
4191 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4192 h->non_got_ref = TRUE;
4193 }
4194 break;
4195
4196 case R_PPC_SDAREL16:
4197 htab->sdata[0].sym->ref_regular = 1;
4198 /* Fall through. */
4199
4200 case R_PPC_VLE_SDAREL_LO16A:
4201 case R_PPC_VLE_SDAREL_LO16D:
4202 case R_PPC_VLE_SDAREL_HI16A:
4203 case R_PPC_VLE_SDAREL_HI16D:
4204 case R_PPC_VLE_SDAREL_HA16A:
4205 case R_PPC_VLE_SDAREL_HA16D:
4206 if (h != NULL)
4207 {
4208 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4209 h->non_got_ref = TRUE;
4210 }
4211 break;
4212
4213 case R_PPC_VLE_REL8:
4214 case R_PPC_VLE_REL15:
4215 case R_PPC_VLE_REL24:
4216 case R_PPC_VLE_LO16A:
4217 case R_PPC_VLE_LO16D:
4218 case R_PPC_VLE_HI16A:
4219 case R_PPC_VLE_HI16D:
4220 case R_PPC_VLE_HA16A:
4221 case R_PPC_VLE_HA16D:
4222 case R_PPC_VLE_ADDR20:
4223 break;
4224
4225 case R_PPC_EMB_SDA2REL:
4226 if (bfd_link_pic (info))
4227 {
4228 bad_shared_reloc (abfd, r_type);
4229 return FALSE;
4230 }
4231 htab->sdata[1].sym->ref_regular = 1;
4232 if (h != NULL)
4233 {
4234 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4235 h->non_got_ref = TRUE;
4236 }
4237 break;
4238
4239 case R_PPC_VLE_SDA21_LO:
4240 case R_PPC_VLE_SDA21:
4241 case R_PPC_EMB_SDA21:
4242 case R_PPC_EMB_RELSDA:
4243 if (bfd_link_pic (info))
4244 {
4245 bad_shared_reloc (abfd, r_type);
4246 return FALSE;
4247 }
4248 if (h != NULL)
4249 {
4250 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4251 h->non_got_ref = TRUE;
4252 }
4253 break;
4254
4255 case R_PPC_EMB_NADDR32:
4256 case R_PPC_EMB_NADDR16:
4257 case R_PPC_EMB_NADDR16_LO:
4258 case R_PPC_EMB_NADDR16_HI:
4259 case R_PPC_EMB_NADDR16_HA:
4260 if (bfd_link_pic (info))
4261 {
4262 bad_shared_reloc (abfd, r_type);
4263 return FALSE;
4264 }
4265 if (h != NULL)
4266 h->non_got_ref = TRUE;
4267 break;
4268
4269 case R_PPC_PLTREL24:
4270 if (h == NULL)
4271 break;
4272 /* Fall through */
4273 case R_PPC_PLT32:
4274 case R_PPC_PLTREL32:
4275 case R_PPC_PLT16_LO:
4276 case R_PPC_PLT16_HI:
4277 case R_PPC_PLT16_HA:
4278 #ifdef DEBUG
4279 fprintf (stderr, "Reloc requires a PLT entry\n");
4280 #endif
4281 /* This symbol requires a procedure linkage table entry. */
4282 if (h == NULL)
4283 {
4284 if (ifunc == NULL)
4285 {
4286 /* It does not make sense to have a procedure linkage
4287 table entry for a non-ifunc local symbol. */
4288 info->callbacks->einfo
4289 /* xgettext:c-format */
4290 (_("%H: %s reloc against local symbol\n"),
4291 abfd, sec, rel->r_offset,
4292 ppc_elf_howto_table[r_type]->name);
4293 bfd_set_error (bfd_error_bad_value);
4294 return FALSE;
4295 }
4296 }
4297 else
4298 {
4299 bfd_vma addend = 0;
4300
4301 if (r_type == R_PPC_PLTREL24)
4302 {
4303 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4304 if (bfd_link_pic (info))
4305 addend = rel->r_addend;
4306 }
4307 h->needs_plt = 1;
4308 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4309 return FALSE;
4310 }
4311 break;
4312
4313 /* The following relocations don't need to propagate the
4314 relocation if linking a shared object since they are
4315 section relative. */
4316 case R_PPC_SECTOFF:
4317 case R_PPC_SECTOFF_LO:
4318 case R_PPC_SECTOFF_HI:
4319 case R_PPC_SECTOFF_HA:
4320 case R_PPC_DTPREL16:
4321 case R_PPC_DTPREL16_LO:
4322 case R_PPC_DTPREL16_HI:
4323 case R_PPC_DTPREL16_HA:
4324 case R_PPC_TOC16:
4325 break;
4326
4327 case R_PPC_REL16:
4328 case R_PPC_REL16_LO:
4329 case R_PPC_REL16_HI:
4330 case R_PPC_REL16_HA:
4331 case R_PPC_REL16DX_HA:
4332 ppc_elf_tdata (abfd)->has_rel16 = 1;
4333 break;
4334
4335 /* These are just markers. */
4336 case R_PPC_TLS:
4337 case R_PPC_EMB_MRKREF:
4338 case R_PPC_NONE:
4339 case R_PPC_max:
4340 case R_PPC_RELAX:
4341 case R_PPC_RELAX_PLT:
4342 case R_PPC_RELAX_PLTREL24:
4343 case R_PPC_16DX_HA:
4344 break;
4345
4346 /* These should only appear in dynamic objects. */
4347 case R_PPC_COPY:
4348 case R_PPC_GLOB_DAT:
4349 case R_PPC_JMP_SLOT:
4350 case R_PPC_RELATIVE:
4351 case R_PPC_IRELATIVE:
4352 break;
4353
4354 /* These aren't handled yet. We'll report an error later. */
4355 case R_PPC_ADDR30:
4356 case R_PPC_EMB_RELSEC16:
4357 case R_PPC_EMB_RELST_LO:
4358 case R_PPC_EMB_RELST_HI:
4359 case R_PPC_EMB_RELST_HA:
4360 case R_PPC_EMB_BIT_FLD:
4361 break;
4362
4363 /* This refers only to functions defined in the shared library. */
4364 case R_PPC_LOCAL24PC:
4365 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4366 {
4367 htab->plt_type = PLT_OLD;
4368 htab->old_bfd = abfd;
4369 }
4370 if (h != NULL && h->type == STT_GNU_IFUNC)
4371 {
4372 h->needs_plt = 1;
4373 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4374 return FALSE;
4375 }
4376 break;
4377
4378 /* This relocation describes the C++ object vtable hierarchy.
4379 Reconstruct it for later use during GC. */
4380 case R_PPC_GNU_VTINHERIT:
4381 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4382 return FALSE;
4383 break;
4384
4385 /* This relocation describes which C++ vtable entries are actually
4386 used. Record for later use during GC. */
4387 case R_PPC_GNU_VTENTRY:
4388 BFD_ASSERT (h != NULL);
4389 if (h != NULL
4390 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4391 return FALSE;
4392 break;
4393
4394 /* We shouldn't really be seeing TPREL32. */
4395 case R_PPC_TPREL32:
4396 case R_PPC_TPREL16:
4397 case R_PPC_TPREL16_LO:
4398 case R_PPC_TPREL16_HI:
4399 case R_PPC_TPREL16_HA:
4400 if (bfd_link_dll (info))
4401 info->flags |= DF_STATIC_TLS;
4402 goto dodyn;
4403
4404 /* Nor these. */
4405 case R_PPC_DTPMOD32:
4406 case R_PPC_DTPREL32:
4407 goto dodyn;
4408
4409 case R_PPC_REL32:
4410 if (h == NULL
4411 && got2 != NULL
4412 && (sec->flags & SEC_CODE) != 0
4413 && bfd_link_pic (info)
4414 && htab->plt_type == PLT_UNSET)
4415 {
4416 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4417 the start of a function, which assembles to a REL32
4418 reference to .got2. If we detect one of these, then
4419 force the old PLT layout because the linker cannot
4420 reliably deduce the GOT pointer value needed for
4421 PLT call stubs. */
4422 asection *s;
4423 Elf_Internal_Sym *isym;
4424
4425 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4426 abfd, r_symndx);
4427 if (isym == NULL)
4428 return FALSE;
4429
4430 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4431 if (s == got2)
4432 {
4433 htab->plt_type = PLT_OLD;
4434 htab->old_bfd = abfd;
4435 }
4436 }
4437 if (h == NULL || h == htab->elf.hgot)
4438 break;
4439 /* fall through */
4440
4441 case R_PPC_ADDR32:
4442 case R_PPC_ADDR16:
4443 case R_PPC_ADDR16_LO:
4444 case R_PPC_ADDR16_HI:
4445 case R_PPC_ADDR16_HA:
4446 case R_PPC_UADDR32:
4447 case R_PPC_UADDR16:
4448 if (h != NULL && !bfd_link_pic (info))
4449 {
4450 /* We may need a plt entry if the symbol turns out to be
4451 a function defined in a dynamic object. */
4452 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4453 return FALSE;
4454
4455 /* We may need a copy reloc too. */
4456 h->non_got_ref = 1;
4457 h->pointer_equality_needed = 1;
4458 if (r_type == R_PPC_ADDR16_HA)
4459 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4460 if (r_type == R_PPC_ADDR16_LO)
4461 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4462 }
4463 goto dodyn;
4464
4465 case R_PPC_REL24:
4466 case R_PPC_REL14:
4467 case R_PPC_REL14_BRTAKEN:
4468 case R_PPC_REL14_BRNTAKEN:
4469 if (h == NULL)
4470 break;
4471 if (h == htab->elf.hgot)
4472 {
4473 if (htab->plt_type == PLT_UNSET)
4474 {
4475 htab->plt_type = PLT_OLD;
4476 htab->old_bfd = abfd;
4477 }
4478 break;
4479 }
4480 /* fall through */
4481
4482 case R_PPC_ADDR24:
4483 case R_PPC_ADDR14:
4484 case R_PPC_ADDR14_BRTAKEN:
4485 case R_PPC_ADDR14_BRNTAKEN:
4486 if (h != NULL && !bfd_link_pic (info))
4487 {
4488 /* We may need a plt entry if the symbol turns out to be
4489 a function defined in a dynamic object. */
4490 h->needs_plt = 1;
4491 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4492 return FALSE;
4493 break;
4494 }
4495
4496 dodyn:
4497 /* If we are creating a shared library, and this is a reloc
4498 against a global symbol, or a non PC relative reloc
4499 against a local symbol, then we need to copy the reloc
4500 into the shared library. However, if we are linking with
4501 -Bsymbolic, we do not need to copy a reloc against a
4502 global symbol which is defined in an object we are
4503 including in the link (i.e., DEF_REGULAR is set). At
4504 this point we have not seen all the input files, so it is
4505 possible that DEF_REGULAR is not set now but will be set
4506 later (it is never cleared). In case of a weak definition,
4507 DEF_REGULAR may be cleared later by a strong definition in
4508 a shared library. We account for that possibility below by
4509 storing information in the dyn_relocs field of the hash
4510 table entry. A similar situation occurs when creating
4511 shared libraries and symbol visibility changes render the
4512 symbol local.
4513
4514 If on the other hand, we are creating an executable, we
4515 may need to keep relocations for symbols satisfied by a
4516 dynamic library if we manage to avoid copy relocs for the
4517 symbol. */
4518 if ((bfd_link_pic (info)
4519 && (must_be_dyn_reloc (info, r_type)
4520 || (h != NULL
4521 && (!SYMBOLIC_BIND (info, h)
4522 || h->root.type == bfd_link_hash_defweak
4523 || !h->def_regular))))
4524 || (ELIMINATE_COPY_RELOCS
4525 && !bfd_link_pic (info)
4526 && h != NULL
4527 && (h->root.type == bfd_link_hash_defweak
4528 || !h->def_regular)))
4529 {
4530 #ifdef DEBUG
4531 fprintf (stderr,
4532 "ppc_elf_check_relocs needs to "
4533 "create relocation for %s\n",
4534 (h && h->root.root.string
4535 ? h->root.root.string : "<unknown>"));
4536 #endif
4537 if (sreloc == NULL)
4538 {
4539 if (htab->elf.dynobj == NULL)
4540 htab->elf.dynobj = abfd;
4541
4542 sreloc = _bfd_elf_make_dynamic_reloc_section
4543 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4544
4545 if (sreloc == NULL)
4546 return FALSE;
4547 }
4548
4549 /* If this is a global symbol, we count the number of
4550 relocations we need for this symbol. */
4551 if (h != NULL)
4552 {
4553 struct elf_dyn_relocs *p;
4554 struct elf_dyn_relocs **rel_head;
4555
4556 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4557 p = *rel_head;
4558 if (p == NULL || p->sec != sec)
4559 {
4560 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4561 if (p == NULL)
4562 return FALSE;
4563 p->next = *rel_head;
4564 *rel_head = p;
4565 p->sec = sec;
4566 p->count = 0;
4567 p->pc_count = 0;
4568 }
4569 p->count += 1;
4570 if (!must_be_dyn_reloc (info, r_type))
4571 p->pc_count += 1;
4572 }
4573 else
4574 {
4575 /* Track dynamic relocs needed for local syms too.
4576 We really need local syms available to do this
4577 easily. Oh well. */
4578 struct ppc_dyn_relocs *p;
4579 struct ppc_dyn_relocs **rel_head;
4580 bfd_boolean is_ifunc;
4581 asection *s;
4582 void *vpp;
4583 Elf_Internal_Sym *isym;
4584
4585 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4586 abfd, r_symndx);
4587 if (isym == NULL)
4588 return FALSE;
4589
4590 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4591 if (s == NULL)
4592 s = sec;
4593
4594 vpp = &elf_section_data (s)->local_dynrel;
4595 rel_head = (struct ppc_dyn_relocs **) vpp;
4596 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4597 p = *rel_head;
4598 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4599 p = p->next;
4600 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4601 {
4602 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4603 if (p == NULL)
4604 return FALSE;
4605 p->next = *rel_head;
4606 *rel_head = p;
4607 p->sec = sec;
4608 p->ifunc = is_ifunc;
4609 p->count = 0;
4610 }
4611 p->count += 1;
4612 }
4613 }
4614
4615 break;
4616 }
4617 }
4618
4619 return TRUE;
4620 }
4621 \f
4622 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4623 and OBFD, and merge non-conflicting ones. */
4624 void
4625 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4626 {
4627 bfd *obfd = info->output_bfd;
4628 obj_attribute *in_attr, *in_attrs;
4629 obj_attribute *out_attr, *out_attrs;
4630
4631 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4632 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4633
4634 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4635 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4636
4637 if (in_attr->i != out_attr->i)
4638 {
4639 int in_fp = in_attr->i & 3;
4640 int out_fp = out_attr->i & 3;
4641
4642 if (in_fp == 0)
4643 ;
4644 else if (out_fp == 0)
4645 {
4646 out_attr->type = 1;
4647 out_attr->i ^= in_fp;
4648 }
4649 else if (out_fp != 2 && in_fp == 2)
4650 _bfd_error_handler
4651 /* xgettext:c-format */
4652 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4653 else if (out_fp == 2 && in_fp != 2)
4654 _bfd_error_handler
4655 /* xgettext:c-format */
4656 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4657 else if (out_fp == 1 && in_fp == 3)
4658 _bfd_error_handler
4659 /* xgettext:c-format */
4660 (_("Warning: %B uses double-precision hard float, "
4661 "%B uses single-precision hard float"), obfd, ibfd);
4662 else if (out_fp == 3 && in_fp == 1)
4663 _bfd_error_handler
4664 /* xgettext:c-format */
4665 (_("Warning: %B uses double-precision hard float, "
4666 "%B uses single-precision hard float"), ibfd, obfd);
4667
4668 in_fp = in_attr->i & 0xc;
4669 out_fp = out_attr->i & 0xc;
4670 if (in_fp == 0)
4671 ;
4672 else if (out_fp == 0)
4673 {
4674 out_attr->type = 1;
4675 out_attr->i ^= in_fp;
4676 }
4677 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4678 _bfd_error_handler
4679 /* xgettext:c-format */
4680 (_("Warning: %B uses 64-bit long double, "
4681 "%B uses 128-bit long double"), ibfd, obfd);
4682 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4683 _bfd_error_handler
4684 /* xgettext:c-format */
4685 (_("Warning: %B uses 64-bit long double, "
4686 "%B uses 128-bit long double"), obfd, ibfd);
4687 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4688 _bfd_error_handler
4689 /* xgettext:c-format */
4690 (_("Warning: %B uses IBM long double, "
4691 "%B uses IEEE long double"), ibfd, obfd);
4692 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4693 _bfd_error_handler
4694 /* xgettext:c-format */
4695 (_("Warning: %B uses IBM long double, "
4696 "%B uses IEEE long double"), obfd, ibfd);
4697 }
4698 }
4699
4700 /* Merge object attributes from IBFD into OBFD. Warn if
4701 there are conflicting attributes. */
4702 static bfd_boolean
4703 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4704 {
4705 bfd *obfd;
4706 obj_attribute *in_attr, *in_attrs;
4707 obj_attribute *out_attr, *out_attrs;
4708
4709 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4710
4711 obfd = info->output_bfd;
4712 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4713 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4714
4715 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4716 merge non-conflicting ones. */
4717 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4718 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4719 if (in_attr->i != out_attr->i)
4720 {
4721 int in_vec = in_attr->i & 3;
4722 int out_vec = out_attr->i & 3;
4723
4724 if (in_vec == 0)
4725 ;
4726 else if (out_vec == 0)
4727 {
4728 out_attr->type = 1;
4729 out_attr->i = in_vec;
4730 }
4731 /* For now, allow generic to transition to AltiVec or SPE
4732 without a warning. If GCC marked files with their stack
4733 alignment and used don't-care markings for files which are
4734 not affected by the vector ABI, we could warn about this
4735 case too. */
4736 else if (in_vec == 1)
4737 ;
4738 else if (out_vec == 1)
4739 {
4740 out_attr->type = 1;
4741 out_attr->i = in_vec;
4742 }
4743 else if (out_vec < in_vec)
4744 _bfd_error_handler
4745 /* xgettext:c-format */
4746 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4747 obfd, ibfd);
4748 else if (out_vec > in_vec)
4749 _bfd_error_handler
4750 /* xgettext:c-format */
4751 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4752 ibfd, obfd);
4753 }
4754
4755 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4756 and merge non-conflicting ones. */
4757 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4758 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4759 if (in_attr->i != out_attr->i)
4760 {
4761 int in_struct = in_attr->i & 3;
4762 int out_struct = out_attr->i & 3;
4763
4764 if (in_struct == 0 || in_struct == 3)
4765 ;
4766 else if (out_struct == 0)
4767 {
4768 out_attr->type = 1;
4769 out_attr->i = in_struct;
4770 }
4771 else if (out_struct < in_struct)
4772 _bfd_error_handler
4773 /* xgettext:c-format */
4774 (_("Warning: %B uses r3/r4 for small structure returns, "
4775 "%B uses memory"), obfd, ibfd);
4776 else if (out_struct > in_struct)
4777 _bfd_error_handler
4778 /* xgettext:c-format */
4779 (_("Warning: %B uses r3/r4 for small structure returns, "
4780 "%B uses memory"), ibfd, obfd);
4781 }
4782
4783 /* Merge Tag_compatibility attributes and any common GNU ones. */
4784 _bfd_elf_merge_object_attributes (ibfd, info);
4785
4786 return TRUE;
4787 }
4788
4789 /* Merge backend specific data from an object file to the output
4790 object file when linking. */
4791
4792 static bfd_boolean
4793 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4794 {
4795 bfd *obfd = info->output_bfd;
4796 flagword old_flags;
4797 flagword new_flags;
4798 bfd_boolean error;
4799
4800 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4801 return TRUE;
4802
4803 /* Check if we have the same endianness. */
4804 if (! _bfd_generic_verify_endian_match (ibfd, info))
4805 return FALSE;
4806
4807 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4808 return FALSE;
4809
4810 new_flags = elf_elfheader (ibfd)->e_flags;
4811 old_flags = elf_elfheader (obfd)->e_flags;
4812 if (!elf_flags_init (obfd))
4813 {
4814 /* First call, no flags set. */
4815 elf_flags_init (obfd) = TRUE;
4816 elf_elfheader (obfd)->e_flags = new_flags;
4817 }
4818
4819 /* Compatible flags are ok. */
4820 else if (new_flags == old_flags)
4821 ;
4822
4823 /* Incompatible flags. */
4824 else
4825 {
4826 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4827 to be linked with either. */
4828 error = FALSE;
4829 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4830 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4831 {
4832 error = TRUE;
4833 _bfd_error_handler
4834 (_("%B: compiled with -mrelocatable and linked with "
4835 "modules compiled normally"), ibfd);
4836 }
4837 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4838 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4839 {
4840 error = TRUE;
4841 _bfd_error_handler
4842 (_("%B: compiled normally and linked with "
4843 "modules compiled with -mrelocatable"), ibfd);
4844 }
4845
4846 /* The output is -mrelocatable-lib iff both the input files are. */
4847 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4848 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4849
4850 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4851 but each input file is either -mrelocatable or -mrelocatable-lib. */
4852 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4853 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4854 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4855 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4856
4857 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4858 any module uses it. */
4859 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4860
4861 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4862 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4863
4864 /* Warn about any other mismatches. */
4865 if (new_flags != old_flags)
4866 {
4867 error = TRUE;
4868 _bfd_error_handler
4869 /* xgettext:c-format */
4870 (_("%B: uses different e_flags (%#x) fields "
4871 "than previous modules (%#x)"),
4872 ibfd, new_flags, old_flags);
4873 }
4874
4875 if (error)
4876 {
4877 bfd_set_error (bfd_error_bad_value);
4878 return FALSE;
4879 }
4880 }
4881
4882 return TRUE;
4883 }
4884
4885 static void
4886 ppc_elf_vle_split16 (bfd *input_bfd,
4887 asection *input_section,
4888 unsigned long offset,
4889 bfd_byte *loc,
4890 bfd_vma value,
4891 split16_format_type split16_format,
4892 bfd_boolean fixup)
4893 {
4894 unsigned int insn, opcode, top5;
4895
4896 insn = bfd_get_32 (input_bfd, loc);
4897 opcode = insn & 0xfc00f800;
4898 if (opcode == E_OR2I_INSN
4899 || opcode == E_AND2I_DOT_INSN
4900 || opcode == E_OR2IS_INSN
4901 || opcode == E_LIS_INSN
4902 || opcode == E_AND2IS_DOT_INSN)
4903 {
4904 if (split16_format != split16a_type)
4905 {
4906 if (fixup)
4907 split16_format = split16a_type;
4908 else
4909 _bfd_error_handler
4910 /* xgettext:c-format */
4911 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4912 input_bfd, input_section, offset, opcode);
4913 }
4914 }
4915 else if (opcode == E_ADD2I_DOT_INSN
4916 || opcode == E_ADD2IS_INSN
4917 || opcode == E_CMP16I_INSN
4918 || opcode == E_MULL2I_INSN
4919 || opcode == E_CMPL16I_INSN
4920 || opcode == E_CMPH16I_INSN
4921 || opcode == E_CMPHL16I_INSN)
4922 {
4923 if (split16_format != split16d_type)
4924 {
4925 if (fixup)
4926 split16_format = split16d_type;
4927 else
4928 _bfd_error_handler
4929 /* xgettext:c-format */
4930 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4931 input_bfd, input_section, offset, opcode);
4932 }
4933 }
4934 top5 = value & 0xf800;
4935 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4936 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4937 insn |= top5;
4938 insn |= value & 0x7ff;
4939 bfd_put_32 (input_bfd, insn, loc);
4940 }
4941
4942 static void
4943 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4944 {
4945 unsigned int insn;
4946
4947 insn = bfd_get_32 (output_bfd, loc);
4948 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4949 /* Top 4 bits of value to 17..20. */
4950 insn |= (value & 0xf0000) >> 5;
4951 /* Next 5 bits of the value to 11..15. */
4952 insn |= (value & 0xf800) << 5;
4953 /* And the final 11 bits of the value to bits 21 to 31. */
4954 insn |= value & 0x7ff;
4955 bfd_put_32 (output_bfd, insn, loc);
4956 }
4957
4958 \f
4959 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4960 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4961 int
4962 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4963 struct bfd_link_info *info)
4964 {
4965 struct ppc_elf_link_hash_table *htab;
4966 flagword flags;
4967
4968 htab = ppc_elf_hash_table (info);
4969
4970 if (htab->plt_type == PLT_UNSET)
4971 {
4972 struct elf_link_hash_entry *h;
4973
4974 if (htab->params->plt_style == PLT_OLD)
4975 htab->plt_type = PLT_OLD;
4976 else if (bfd_link_pic (info)
4977 && htab->elf.dynamic_sections_created
4978 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4979 FALSE, FALSE, TRUE)) != NULL
4980 && (h->type == STT_FUNC
4981 || h->needs_plt)
4982 && h->ref_regular
4983 && !(SYMBOL_CALLS_LOCAL (info, h)
4984 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4985 {
4986 /* Profiling of shared libs (and pies) is not supported with
4987 secure plt, because ppc32 does profiling before a
4988 function prologue and a secure plt pic call stubs needs
4989 r30 to be set up. */
4990 htab->plt_type = PLT_OLD;
4991 }
4992 else
4993 {
4994 bfd *ibfd;
4995 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4996
4997 /* Look through the reloc flags left by ppc_elf_check_relocs.
4998 Use the old style bss plt if a file makes plt calls
4999 without using the new relocs, and if ld isn't given
5000 --secure-plt and we never see REL16 relocs. */
5001 if (plt_type == PLT_UNSET)
5002 plt_type = PLT_OLD;
5003 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5004 if (is_ppc_elf (ibfd))
5005 {
5006 if (ppc_elf_tdata (ibfd)->has_rel16)
5007 plt_type = PLT_NEW;
5008 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5009 {
5010 plt_type = PLT_OLD;
5011 htab->old_bfd = ibfd;
5012 break;
5013 }
5014 }
5015 htab->plt_type = plt_type;
5016 }
5017 }
5018 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5019 {
5020 if (htab->old_bfd != NULL)
5021 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5022 htab->old_bfd);
5023 else
5024 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5025 }
5026
5027 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5028
5029 if (htab->plt_type == PLT_NEW)
5030 {
5031 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5032 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5033
5034 /* The new PLT is a loaded section. */
5035 if (htab->elf.splt != NULL
5036 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5037 return -1;
5038
5039 /* The new GOT is not executable. */
5040 if (htab->elf.sgot != NULL
5041 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5042 return -1;
5043 }
5044 else
5045 {
5046 /* Stop an unused .glink section from affecting .text alignment. */
5047 if (htab->glink != NULL
5048 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5049 return -1;
5050 }
5051 return htab->plt_type == PLT_NEW;
5052 }
5053 \f
5054 /* Return the section that should be marked against GC for a given
5055 relocation. */
5056
5057 static asection *
5058 ppc_elf_gc_mark_hook (asection *sec,
5059 struct bfd_link_info *info,
5060 Elf_Internal_Rela *rel,
5061 struct elf_link_hash_entry *h,
5062 Elf_Internal_Sym *sym)
5063 {
5064 if (h != NULL)
5065 switch (ELF32_R_TYPE (rel->r_info))
5066 {
5067 case R_PPC_GNU_VTINHERIT:
5068 case R_PPC_GNU_VTENTRY:
5069 return NULL;
5070 }
5071
5072 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5073 }
5074
5075 /* Update the got, plt and dynamic reloc reference counts for the
5076 section being removed. */
5077
5078 static bfd_boolean
5079 ppc_elf_gc_sweep_hook (bfd *abfd,
5080 struct bfd_link_info *info,
5081 asection *sec,
5082 const Elf_Internal_Rela *relocs)
5083 {
5084 struct ppc_elf_link_hash_table *htab;
5085 Elf_Internal_Shdr *symtab_hdr;
5086 struct elf_link_hash_entry **sym_hashes;
5087 bfd_signed_vma *local_got_refcounts;
5088 const Elf_Internal_Rela *rel, *relend;
5089 asection *got2;
5090
5091 if (bfd_link_relocatable (info))
5092 return TRUE;
5093
5094 if ((sec->flags & SEC_ALLOC) == 0)
5095 return TRUE;
5096
5097 elf_section_data (sec)->local_dynrel = NULL;
5098
5099 htab = ppc_elf_hash_table (info);
5100 symtab_hdr = &elf_symtab_hdr (abfd);
5101 sym_hashes = elf_sym_hashes (abfd);
5102 local_got_refcounts = elf_local_got_refcounts (abfd);
5103 got2 = bfd_get_section_by_name (abfd, ".got2");
5104
5105 relend = relocs + sec->reloc_count;
5106 for (rel = relocs; rel < relend; rel++)
5107 {
5108 unsigned long r_symndx;
5109 enum elf_ppc_reloc_type r_type;
5110 struct elf_link_hash_entry *h = NULL;
5111
5112 r_symndx = ELF32_R_SYM (rel->r_info);
5113 if (r_symndx >= symtab_hdr->sh_info)
5114 {
5115 struct elf_dyn_relocs **pp, *p;
5116 struct ppc_elf_link_hash_entry *eh;
5117
5118 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5119 while (h->root.type == bfd_link_hash_indirect
5120 || h->root.type == bfd_link_hash_warning)
5121 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5122 eh = (struct ppc_elf_link_hash_entry *) h;
5123
5124 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5125 if (p->sec == sec)
5126 {
5127 /* Everything must go for SEC. */
5128 *pp = p->next;
5129 break;
5130 }
5131 }
5132
5133 r_type = ELF32_R_TYPE (rel->r_info);
5134 if (!htab->is_vxworks
5135 && h == NULL
5136 && local_got_refcounts != NULL
5137 && (!bfd_link_pic (info)
5138 || is_branch_reloc (r_type)))
5139 {
5140 struct plt_entry **local_plt = (struct plt_entry **)
5141 (local_got_refcounts + symtab_hdr->sh_info);
5142 char *local_got_tls_masks = (char *)
5143 (local_plt + symtab_hdr->sh_info);
5144 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5145 {
5146 struct plt_entry **ifunc = local_plt + r_symndx;
5147 bfd_vma addend = 0;
5148 struct plt_entry *ent;
5149
5150 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5151 addend = rel->r_addend;
5152 ent = find_plt_ent (ifunc, got2, addend);
5153 if (ent->plt.refcount > 0)
5154 ent->plt.refcount -= 1;
5155 continue;
5156 }
5157 }
5158
5159 switch (r_type)
5160 {
5161 case R_PPC_GOT_TLSLD16:
5162 case R_PPC_GOT_TLSLD16_LO:
5163 case R_PPC_GOT_TLSLD16_HI:
5164 case R_PPC_GOT_TLSLD16_HA:
5165 case R_PPC_GOT_TLSGD16:
5166 case R_PPC_GOT_TLSGD16_LO:
5167 case R_PPC_GOT_TLSGD16_HI:
5168 case R_PPC_GOT_TLSGD16_HA:
5169 case R_PPC_GOT_TPREL16:
5170 case R_PPC_GOT_TPREL16_LO:
5171 case R_PPC_GOT_TPREL16_HI:
5172 case R_PPC_GOT_TPREL16_HA:
5173 case R_PPC_GOT_DTPREL16:
5174 case R_PPC_GOT_DTPREL16_LO:
5175 case R_PPC_GOT_DTPREL16_HI:
5176 case R_PPC_GOT_DTPREL16_HA:
5177 case R_PPC_GOT16:
5178 case R_PPC_GOT16_LO:
5179 case R_PPC_GOT16_HI:
5180 case R_PPC_GOT16_HA:
5181 if (h != NULL)
5182 {
5183 if (h->got.refcount > 0)
5184 h->got.refcount--;
5185 if (!bfd_link_pic (info))
5186 {
5187 struct plt_entry *ent;
5188
5189 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5190 if (ent != NULL && ent->plt.refcount > 0)
5191 ent->plt.refcount -= 1;
5192 }
5193 }
5194 else if (local_got_refcounts != NULL)
5195 {
5196 if (local_got_refcounts[r_symndx] > 0)
5197 local_got_refcounts[r_symndx]--;
5198 }
5199 break;
5200
5201 case R_PPC_REL24:
5202 case R_PPC_REL14:
5203 case R_PPC_REL14_BRTAKEN:
5204 case R_PPC_REL14_BRNTAKEN:
5205 case R_PPC_REL32:
5206 if (h == NULL || h == htab->elf.hgot)
5207 break;
5208 /* Fall through. */
5209
5210 case R_PPC_ADDR32:
5211 case R_PPC_ADDR24:
5212 case R_PPC_ADDR16:
5213 case R_PPC_ADDR16_LO:
5214 case R_PPC_ADDR16_HI:
5215 case R_PPC_ADDR16_HA:
5216 case R_PPC_ADDR14:
5217 case R_PPC_ADDR14_BRTAKEN:
5218 case R_PPC_ADDR14_BRNTAKEN:
5219 case R_PPC_UADDR32:
5220 case R_PPC_UADDR16:
5221 if (bfd_link_pic (info))
5222 break;
5223 /* Fall through. */
5224
5225 case R_PPC_PLT32:
5226 case R_PPC_PLTREL24:
5227 case R_PPC_PLTREL32:
5228 case R_PPC_PLT16_LO:
5229 case R_PPC_PLT16_HI:
5230 case R_PPC_PLT16_HA:
5231 if (h != NULL)
5232 {
5233 bfd_vma addend = 0;
5234 struct plt_entry *ent;
5235
5236 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5237 addend = rel->r_addend;
5238 ent = find_plt_ent (&h->plt.plist, got2, addend);
5239 if (ent != NULL && ent->plt.refcount > 0)
5240 ent->plt.refcount -= 1;
5241 }
5242 break;
5243
5244 default:
5245 break;
5246 }
5247 }
5248 return TRUE;
5249 }
5250 \f
5251 /* Set plt output section type, htab->tls_get_addr, and call the
5252 generic ELF tls_setup function. */
5253
5254 asection *
5255 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5256 {
5257 struct ppc_elf_link_hash_table *htab;
5258
5259 htab = ppc_elf_hash_table (info);
5260 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5261 FALSE, FALSE, TRUE);
5262 if (htab->plt_type != PLT_NEW)
5263 htab->params->no_tls_get_addr_opt = TRUE;
5264
5265 if (!htab->params->no_tls_get_addr_opt)
5266 {
5267 struct elf_link_hash_entry *opt, *tga;
5268 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5269 FALSE, FALSE, TRUE);
5270 if (opt != NULL
5271 && (opt->root.type == bfd_link_hash_defined
5272 || opt->root.type == bfd_link_hash_defweak))
5273 {
5274 /* If glibc supports an optimized __tls_get_addr call stub,
5275 signalled by the presence of __tls_get_addr_opt, and we'll
5276 be calling __tls_get_addr via a plt call stub, then
5277 make __tls_get_addr point to __tls_get_addr_opt. */
5278 tga = htab->tls_get_addr;
5279 if (htab->elf.dynamic_sections_created
5280 && tga != NULL
5281 && (tga->type == STT_FUNC
5282 || tga->needs_plt)
5283 && !(SYMBOL_CALLS_LOCAL (info, tga)
5284 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5285 {
5286 struct plt_entry *ent;
5287 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5288 if (ent->plt.refcount > 0)
5289 break;
5290 if (ent != NULL)
5291 {
5292 tga->root.type = bfd_link_hash_indirect;
5293 tga->root.u.i.link = &opt->root;
5294 ppc_elf_copy_indirect_symbol (info, opt, tga);
5295 opt->mark = 1;
5296 if (opt->dynindx != -1)
5297 {
5298 /* Use __tls_get_addr_opt in dynamic relocations. */
5299 opt->dynindx = -1;
5300 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5301 opt->dynstr_index);
5302 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5303 return FALSE;
5304 }
5305 htab->tls_get_addr = opt;
5306 }
5307 }
5308 }
5309 else
5310 htab->params->no_tls_get_addr_opt = TRUE;
5311 }
5312 if (htab->plt_type == PLT_NEW
5313 && htab->elf.splt != NULL
5314 && htab->elf.splt->output_section != NULL)
5315 {
5316 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5317 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5318 }
5319
5320 return _bfd_elf_tls_setup (obfd, info);
5321 }
5322
5323 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5324 HASH. */
5325
5326 static bfd_boolean
5327 branch_reloc_hash_match (const bfd *ibfd,
5328 const Elf_Internal_Rela *rel,
5329 const struct elf_link_hash_entry *hash)
5330 {
5331 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5332 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5333 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5334
5335 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5336 {
5337 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5338 struct elf_link_hash_entry *h;
5339
5340 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5341 while (h->root.type == bfd_link_hash_indirect
5342 || h->root.type == bfd_link_hash_warning)
5343 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5344 if (h == hash)
5345 return TRUE;
5346 }
5347 return FALSE;
5348 }
5349
5350 /* Run through all the TLS relocs looking for optimization
5351 opportunities. */
5352
5353 bfd_boolean
5354 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5355 struct bfd_link_info *info)
5356 {
5357 bfd *ibfd;
5358 asection *sec;
5359 struct ppc_elf_link_hash_table *htab;
5360 int pass;
5361
5362 if (!bfd_link_executable (info))
5363 return TRUE;
5364
5365 htab = ppc_elf_hash_table (info);
5366 if (htab == NULL)
5367 return FALSE;
5368
5369 /* Make two passes through the relocs. First time check that tls
5370 relocs involved in setting up a tls_get_addr call are indeed
5371 followed by such a call. If they are not, don't do any tls
5372 optimization. On the second pass twiddle tls_mask flags to
5373 notify relocate_section that optimization can be done, and
5374 adjust got and plt refcounts. */
5375 for (pass = 0; pass < 2; ++pass)
5376 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5377 {
5378 Elf_Internal_Sym *locsyms = NULL;
5379 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5380 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5381
5382 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5383 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5384 {
5385 Elf_Internal_Rela *relstart, *rel, *relend;
5386 int expecting_tls_get_addr = 0;
5387
5388 /* Read the relocations. */
5389 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5390 info->keep_memory);
5391 if (relstart == NULL)
5392 return FALSE;
5393
5394 relend = relstart + sec->reloc_count;
5395 for (rel = relstart; rel < relend; rel++)
5396 {
5397 enum elf_ppc_reloc_type r_type;
5398 unsigned long r_symndx;
5399 struct elf_link_hash_entry *h = NULL;
5400 char *tls_mask;
5401 char tls_set, tls_clear;
5402 bfd_boolean is_local;
5403 bfd_signed_vma *got_count;
5404
5405 r_symndx = ELF32_R_SYM (rel->r_info);
5406 if (r_symndx >= symtab_hdr->sh_info)
5407 {
5408 struct elf_link_hash_entry **sym_hashes;
5409
5410 sym_hashes = elf_sym_hashes (ibfd);
5411 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5412 while (h->root.type == bfd_link_hash_indirect
5413 || h->root.type == bfd_link_hash_warning)
5414 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5415 }
5416
5417 is_local = FALSE;
5418 if (h == NULL
5419 || !h->def_dynamic)
5420 is_local = TRUE;
5421
5422 r_type = ELF32_R_TYPE (rel->r_info);
5423 /* If this section has old-style __tls_get_addr calls
5424 without marker relocs, then check that each
5425 __tls_get_addr call reloc is preceded by a reloc
5426 that conceivably belongs to the __tls_get_addr arg
5427 setup insn. If we don't find matching arg setup
5428 relocs, don't do any tls optimization. */
5429 if (pass == 0
5430 && sec->has_tls_get_addr_call
5431 && h != NULL
5432 && h == htab->tls_get_addr
5433 && !expecting_tls_get_addr
5434 && is_branch_reloc (r_type))
5435 {
5436 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5437 "TLS optimization disabled\n",
5438 ibfd, sec, rel->r_offset);
5439 if (elf_section_data (sec)->relocs != relstart)
5440 free (relstart);
5441 return TRUE;
5442 }
5443
5444 expecting_tls_get_addr = 0;
5445 switch (r_type)
5446 {
5447 case R_PPC_GOT_TLSLD16:
5448 case R_PPC_GOT_TLSLD16_LO:
5449 expecting_tls_get_addr = 1;
5450 /* Fall through. */
5451
5452 case R_PPC_GOT_TLSLD16_HI:
5453 case R_PPC_GOT_TLSLD16_HA:
5454 /* These relocs should never be against a symbol
5455 defined in a shared lib. Leave them alone if
5456 that turns out to be the case. */
5457 if (!is_local)
5458 continue;
5459
5460 /* LD -> LE */
5461 tls_set = 0;
5462 tls_clear = TLS_LD;
5463 break;
5464
5465 case R_PPC_GOT_TLSGD16:
5466 case R_PPC_GOT_TLSGD16_LO:
5467 expecting_tls_get_addr = 1;
5468 /* Fall through. */
5469
5470 case R_PPC_GOT_TLSGD16_HI:
5471 case R_PPC_GOT_TLSGD16_HA:
5472 if (is_local)
5473 /* GD -> LE */
5474 tls_set = 0;
5475 else
5476 /* GD -> IE */
5477 tls_set = TLS_TLS | TLS_TPRELGD;
5478 tls_clear = TLS_GD;
5479 break;
5480
5481 case R_PPC_GOT_TPREL16:
5482 case R_PPC_GOT_TPREL16_LO:
5483 case R_PPC_GOT_TPREL16_HI:
5484 case R_PPC_GOT_TPREL16_HA:
5485 if (is_local)
5486 {
5487 /* IE -> LE */
5488 tls_set = 0;
5489 tls_clear = TLS_TPREL;
5490 break;
5491 }
5492 else
5493 continue;
5494
5495 case R_PPC_TLSGD:
5496 case R_PPC_TLSLD:
5497 expecting_tls_get_addr = 2;
5498 tls_set = 0;
5499 tls_clear = 0;
5500 break;
5501
5502 default:
5503 continue;
5504 }
5505
5506 if (pass == 0)
5507 {
5508 if (!expecting_tls_get_addr
5509 || (expecting_tls_get_addr == 1
5510 && !sec->has_tls_get_addr_call))
5511 continue;
5512
5513 if (rel + 1 < relend
5514 && branch_reloc_hash_match (ibfd, rel + 1,
5515 htab->tls_get_addr))
5516 continue;
5517
5518 /* Uh oh, we didn't find the expected call. We
5519 could just mark this symbol to exclude it
5520 from tls optimization but it's safer to skip
5521 the entire optimization. */
5522 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5523 "TLS optimization disabled\n"),
5524 ibfd, sec, rel->r_offset);
5525 if (elf_section_data (sec)->relocs != relstart)
5526 free (relstart);
5527 return TRUE;
5528 }
5529
5530 if (expecting_tls_get_addr)
5531 {
5532 struct plt_entry *ent;
5533 bfd_vma addend = 0;
5534
5535 if (bfd_link_pic (info)
5536 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5537 addend = rel[1].r_addend;
5538 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5539 got2, addend);
5540 if (ent != NULL && ent->plt.refcount > 0)
5541 ent->plt.refcount -= 1;
5542
5543 if (expecting_tls_get_addr == 2)
5544 continue;
5545 }
5546
5547 if (h != NULL)
5548 {
5549 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5550 got_count = &h->got.refcount;
5551 }
5552 else
5553 {
5554 bfd_signed_vma *lgot_refs;
5555 struct plt_entry **local_plt;
5556 char *lgot_masks;
5557
5558 if (locsyms == NULL)
5559 {
5560 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5561 if (locsyms == NULL)
5562 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5563 symtab_hdr->sh_info,
5564 0, NULL, NULL, NULL);
5565 if (locsyms == NULL)
5566 {
5567 if (elf_section_data (sec)->relocs != relstart)
5568 free (relstart);
5569 return FALSE;
5570 }
5571 }
5572 lgot_refs = elf_local_got_refcounts (ibfd);
5573 if (lgot_refs == NULL)
5574 abort ();
5575 local_plt = (struct plt_entry **)
5576 (lgot_refs + symtab_hdr->sh_info);
5577 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5578 tls_mask = &lgot_masks[r_symndx];
5579 got_count = &lgot_refs[r_symndx];
5580 }
5581
5582 if (tls_set == 0)
5583 {
5584 /* We managed to get rid of a got entry. */
5585 if (*got_count > 0)
5586 *got_count -= 1;
5587 }
5588
5589 *tls_mask |= tls_set;
5590 *tls_mask &= ~tls_clear;
5591 }
5592
5593 if (elf_section_data (sec)->relocs != relstart)
5594 free (relstart);
5595 }
5596
5597 if (locsyms != NULL
5598 && (symtab_hdr->contents != (unsigned char *) locsyms))
5599 {
5600 if (!info->keep_memory)
5601 free (locsyms);
5602 else
5603 symtab_hdr->contents = (unsigned char *) locsyms;
5604 }
5605 }
5606 htab->do_tls_opt = 1;
5607 return TRUE;
5608 }
5609 \f
5610 /* Return true if we have dynamic relocs that apply to read-only sections. */
5611
5612 static bfd_boolean
5613 readonly_dynrelocs (struct elf_link_hash_entry *h,
5614 struct bfd_link_info *info)
5615 {
5616 struct elf_dyn_relocs *p;
5617
5618 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5619 {
5620 asection *s = p->sec->output_section;
5621
5622 if (s != NULL
5623 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5624 == (SEC_READONLY | SEC_ALLOC)))
5625 {
5626 if (info)
5627 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
5628 p->sec->owner, p->sec);
5629
5630 return TRUE;
5631 }
5632 }
5633 return FALSE;
5634 }
5635
5636 /* Adjust a symbol defined by a dynamic object and referenced by a
5637 regular object. The current definition is in some section of the
5638 dynamic object, but we're not including those sections. We have to
5639 change the definition to something the rest of the link can
5640 understand. */
5641
5642 static bfd_boolean
5643 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5644 struct elf_link_hash_entry *h)
5645 {
5646 struct ppc_elf_link_hash_table *htab;
5647 asection *s;
5648
5649 #ifdef DEBUG
5650 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5651 h->root.root.string);
5652 #endif
5653
5654 /* Make sure we know what is going on here. */
5655 htab = ppc_elf_hash_table (info);
5656 BFD_ASSERT (htab->elf.dynobj != NULL
5657 && (h->needs_plt
5658 || h->type == STT_GNU_IFUNC
5659 || h->u.weakdef != NULL
5660 || (h->def_dynamic
5661 && h->ref_regular
5662 && !h->def_regular)));
5663
5664 /* Deal with function syms. */
5665 if (h->type == STT_FUNC
5666 || h->type == STT_GNU_IFUNC
5667 || h->needs_plt)
5668 {
5669 /* Clear procedure linkage table information for any symbol that
5670 won't need a .plt entry. */
5671 struct plt_entry *ent;
5672 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5673 if (ent->plt.refcount > 0)
5674 break;
5675 if (ent == NULL
5676 || (h->type != STT_GNU_IFUNC
5677 && (SYMBOL_CALLS_LOCAL (info, h)
5678 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))))
5679 {
5680 /* A PLT entry is not required/allowed when:
5681
5682 1. We are not using ld.so; because then the PLT entry
5683 can't be set up, so we can't use one. In this case,
5684 ppc_elf_adjust_dynamic_symbol won't even be called.
5685
5686 2. GC has rendered the entry unused.
5687
5688 3. We know for certain that a call to this symbol
5689 will go to this object, or will remain undefined. */
5690 h->plt.plist = NULL;
5691 h->needs_plt = 0;
5692 h->pointer_equality_needed = 0;
5693 }
5694 else
5695 {
5696 /* Taking a function's address in a read/write section
5697 doesn't require us to define the function symbol in the
5698 executable on a plt call stub. A dynamic reloc can
5699 be used instead, giving better runtime performance.
5700 (Calls via that function pointer don't need to bounce
5701 through the plt call stub.) Similarly, use a dynamic
5702 reloc for a weak reference when possible, allowing the
5703 resolution of the symbol to be set at load time rather
5704 than link time. */
5705 if ((h->pointer_equality_needed
5706 || (!h->ref_regular_nonweak && h->non_got_ref))
5707 && !htab->is_vxworks
5708 && !ppc_elf_hash_entry (h)->has_sda_refs
5709 && !readonly_dynrelocs (h, NULL))
5710 {
5711 h->pointer_equality_needed = 0;
5712 /* After adjust_dynamic_symbol, non_got_ref set in the
5713 non-pic case means that dyn_relocs for this symbol
5714 should be discarded. */
5715 h->non_got_ref = 0;
5716 }
5717 }
5718 h->protected_def = 0;
5719 return TRUE;
5720 }
5721 else
5722 h->plt.plist = NULL;
5723
5724 /* If this is a weak symbol, and there is a real definition, the
5725 processor independent code will have arranged for us to see the
5726 real definition first, and we can just use the same value. */
5727 if (h->u.weakdef != NULL)
5728 {
5729 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5730 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5731 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5732 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5733 if (ELIMINATE_COPY_RELOCS)
5734 h->non_got_ref = h->u.weakdef->non_got_ref;
5735 return TRUE;
5736 }
5737
5738 /* This is a reference to a symbol defined by a dynamic object which
5739 is not a function. */
5740
5741 /* If we are creating a shared library, we must presume that the
5742 only references to the symbol are via the global offset table.
5743 For such cases we need not do anything here; the relocations will
5744 be handled correctly by relocate_section. */
5745 if (bfd_link_pic (info))
5746 {
5747 h->protected_def = 0;
5748 return TRUE;
5749 }
5750
5751 /* If there are no references to this symbol that do not use the
5752 GOT, we don't need to generate a copy reloc. */
5753 if (!h->non_got_ref)
5754 {
5755 h->protected_def = 0;
5756 return TRUE;
5757 }
5758
5759 /* Protected variables do not work with .dynbss. The copy in
5760 .dynbss won't be used by the shared library with the protected
5761 definition for the variable. Editing to PIC, or text relocations
5762 are preferable to an incorrect program. */
5763 if (h->protected_def)
5764 {
5765 if (ELIMINATE_COPY_RELOCS
5766 && ppc_elf_hash_entry (h)->has_addr16_ha
5767 && ppc_elf_hash_entry (h)->has_addr16_lo
5768 && htab->params->pic_fixup == 0
5769 && info->disable_target_specific_optimizations <= 1)
5770 htab->params->pic_fixup = 1;
5771 h->non_got_ref = 0;
5772 return TRUE;
5773 }
5774
5775 /* If -z nocopyreloc was given, we won't generate them either. */
5776 if (info->nocopyreloc)
5777 {
5778 h->non_got_ref = 0;
5779 return TRUE;
5780 }
5781
5782 /* If we didn't find any dynamic relocs in read-only sections, then
5783 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5784 We can't do this if there are any small data relocations. This
5785 doesn't work on VxWorks, where we can not have dynamic
5786 relocations (other than copy and jump slot relocations) in an
5787 executable. */
5788 if (ELIMINATE_COPY_RELOCS
5789 && !ppc_elf_hash_entry (h)->has_sda_refs
5790 && !htab->is_vxworks
5791 && !h->def_regular
5792 && !readonly_dynrelocs (h, NULL))
5793 {
5794 h->non_got_ref = 0;
5795 return TRUE;
5796 }
5797
5798 /* We must allocate the symbol in our .dynbss section, which will
5799 become part of the .bss section of the executable. There will be
5800 an entry for this symbol in the .dynsym section. The dynamic
5801 object will contain position independent code, so all references
5802 from the dynamic object to this symbol will go through the global
5803 offset table. The dynamic linker will use the .dynsym entry to
5804 determine the address it must put in the global offset table, so
5805 both the dynamic object and the regular object will refer to the
5806 same memory location for the variable.
5807
5808 Of course, if the symbol is referenced using SDAREL relocs, we
5809 must instead allocate it in .sbss. */
5810
5811 if (ppc_elf_hash_entry (h)->has_sda_refs)
5812 s = htab->dynsbss;
5813 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5814 s = htab->elf.sdynrelro;
5815 else
5816 s = htab->elf.sdynbss;
5817 BFD_ASSERT (s != NULL);
5818
5819 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5820 copy the initial value out of the dynamic object and into the
5821 runtime process image. We need to remember the offset into the
5822 .rela.bss section we are going to use. */
5823 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5824 {
5825 asection *srel;
5826
5827 if (ppc_elf_hash_entry (h)->has_sda_refs)
5828 srel = htab->relsbss;
5829 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5830 srel = htab->elf.sreldynrelro;
5831 else
5832 srel = htab->elf.srelbss;
5833 BFD_ASSERT (srel != NULL);
5834 srel->size += sizeof (Elf32_External_Rela);
5835 h->needs_copy = 1;
5836 }
5837
5838 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5839 }
5840 \f
5841 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5842 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5843 specifying the addend on the plt relocation. For -fpic code, the sym
5844 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5845 xxxxxxxx.got2.plt_pic32.<callee>. */
5846
5847 static bfd_boolean
5848 add_stub_sym (struct plt_entry *ent,
5849 struct elf_link_hash_entry *h,
5850 struct bfd_link_info *info)
5851 {
5852 struct elf_link_hash_entry *sh;
5853 size_t len1, len2, len3;
5854 char *name;
5855 const char *stub;
5856 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5857
5858 if (bfd_link_pic (info))
5859 stub = ".plt_pic32.";
5860 else
5861 stub = ".plt_call32.";
5862
5863 len1 = strlen (h->root.root.string);
5864 len2 = strlen (stub);
5865 len3 = 0;
5866 if (ent->sec)
5867 len3 = strlen (ent->sec->name);
5868 name = bfd_malloc (len1 + len2 + len3 + 9);
5869 if (name == NULL)
5870 return FALSE;
5871 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5872 if (ent->sec)
5873 memcpy (name + 8, ent->sec->name, len3);
5874 memcpy (name + 8 + len3, stub, len2);
5875 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5876 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5877 if (sh == NULL)
5878 return FALSE;
5879 if (sh->root.type == bfd_link_hash_new)
5880 {
5881 sh->root.type = bfd_link_hash_defined;
5882 sh->root.u.def.section = htab->glink;
5883 sh->root.u.def.value = ent->glink_offset;
5884 sh->ref_regular = 1;
5885 sh->def_regular = 1;
5886 sh->ref_regular_nonweak = 1;
5887 sh->forced_local = 1;
5888 sh->non_elf = 0;
5889 sh->root.linker_def = 1;
5890 }
5891 return TRUE;
5892 }
5893
5894 /* Allocate NEED contiguous space in .got, and return the offset.
5895 Handles allocation of the got header when crossing 32k. */
5896
5897 static bfd_vma
5898 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5899 {
5900 bfd_vma where;
5901 unsigned int max_before_header;
5902
5903 if (htab->plt_type == PLT_VXWORKS)
5904 {
5905 where = htab->elf.sgot->size;
5906 htab->elf.sgot->size += need;
5907 }
5908 else
5909 {
5910 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5911 if (need <= htab->got_gap)
5912 {
5913 where = max_before_header - htab->got_gap;
5914 htab->got_gap -= need;
5915 }
5916 else
5917 {
5918 if (htab->elf.sgot->size + need > max_before_header
5919 && htab->elf.sgot->size <= max_before_header)
5920 {
5921 htab->got_gap = max_before_header - htab->elf.sgot->size;
5922 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5923 }
5924 where = htab->elf.sgot->size;
5925 htab->elf.sgot->size += need;
5926 }
5927 }
5928 return where;
5929 }
5930
5931 /* If H is undefined, make it dynamic if that makes sense. */
5932
5933 static bfd_boolean
5934 ensure_undef_dynamic (struct bfd_link_info *info,
5935 struct elf_link_hash_entry *h)
5936 {
5937 struct elf_link_hash_table *htab = elf_hash_table (info);
5938
5939 if (htab->dynamic_sections_created
5940 && ((info->dynamic_undefined_weak != 0
5941 && h->root.type == bfd_link_hash_undefweak)
5942 || h->root.type == bfd_link_hash_undefined)
5943 && h->dynindx == -1
5944 && !h->forced_local
5945 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5946 return bfd_elf_link_record_dynamic_symbol (info, h);
5947 return TRUE;
5948 }
5949
5950 /* Allocate space in associated reloc sections for dynamic relocs. */
5951
5952 static bfd_boolean
5953 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5954 {
5955 struct bfd_link_info *info = inf;
5956 struct ppc_elf_link_hash_entry *eh;
5957 struct ppc_elf_link_hash_table *htab;
5958 struct elf_dyn_relocs *p;
5959 bfd_boolean dyn;
5960
5961 if (h->root.type == bfd_link_hash_indirect)
5962 return TRUE;
5963
5964 htab = ppc_elf_hash_table (info);
5965 eh = (struct ppc_elf_link_hash_entry *) h;
5966 if (eh->elf.got.refcount > 0
5967 || (ELIMINATE_COPY_RELOCS
5968 && !eh->elf.def_regular
5969 && eh->elf.protected_def
5970 && eh->has_addr16_ha
5971 && eh->has_addr16_lo
5972 && htab->params->pic_fixup > 0))
5973 {
5974 unsigned int need;
5975
5976 /* Make sure this symbol is output as a dynamic symbol. */
5977 if (!ensure_undef_dynamic (info, &eh->elf))
5978 return FALSE;
5979
5980 need = 0;
5981 if ((eh->tls_mask & TLS_TLS) != 0)
5982 {
5983 if ((eh->tls_mask & TLS_LD) != 0)
5984 {
5985 if (!eh->elf.def_dynamic)
5986 /* We'll just use htab->tlsld_got.offset. This should
5987 always be the case. It's a little odd if we have
5988 a local dynamic reloc against a non-local symbol. */
5989 htab->tlsld_got.refcount += 1;
5990 else
5991 need += 8;
5992 }
5993 if ((eh->tls_mask & TLS_GD) != 0)
5994 need += 8;
5995 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5996 need += 4;
5997 if ((eh->tls_mask & TLS_DTPREL) != 0)
5998 need += 4;
5999 }
6000 else
6001 need += 4;
6002 if (need == 0)
6003 eh->elf.got.offset = (bfd_vma) -1;
6004 else
6005 {
6006 eh->elf.got.offset = allocate_got (htab, need);
6007 if ((bfd_link_pic (info)
6008 || (htab->elf.dynamic_sections_created
6009 && eh->elf.dynindx != -1
6010 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6011 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6012 {
6013 asection *rsec = htab->elf.srelgot;
6014
6015 if (eh->elf.type == STT_GNU_IFUNC)
6016 rsec = htab->elf.irelplt;
6017 /* All the entries we allocated need relocs.
6018 Except LD only needs one. */
6019 if ((eh->tls_mask & TLS_LD) != 0
6020 && eh->elf.def_dynamic)
6021 need -= 4;
6022 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6023 }
6024 }
6025 }
6026 else
6027 eh->elf.got.offset = (bfd_vma) -1;
6028
6029 /* If no dynamic sections we can't have dynamic relocs, except for
6030 IFUNCs which are handled even in static executables. */
6031 if (!htab->elf.dynamic_sections_created
6032 && h->type != STT_GNU_IFUNC)
6033 eh->dyn_relocs = NULL;
6034
6035 if (eh->dyn_relocs == NULL)
6036 ;
6037
6038 /* In the shared -Bsymbolic case, discard space allocated for
6039 dynamic pc-relative relocs against symbols which turn out to be
6040 defined in regular objects. For the normal shared case, discard
6041 space for relocs that have become local due to symbol visibility
6042 changes. */
6043 else if (bfd_link_pic (info))
6044 {
6045 /* Discard relocs on undefined symbols that must be local. */
6046 if (h->root.type == bfd_link_hash_undefined
6047 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6048 eh->dyn_relocs = NULL;
6049
6050 /* Also discard relocs on undefined weak syms with non-default
6051 visibility, or when dynamic_undefined_weak says so. */
6052 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6053 eh->dyn_relocs = NULL;
6054
6055 /* Relocs that use pc_count are those that appear on a call insn,
6056 or certain REL relocs (see must_be_dyn_reloc) that can be
6057 generated via assembly. We want calls to protected symbols to
6058 resolve directly to the function rather than going via the plt.
6059 If people want function pointer comparisons to work as expected
6060 then they should avoid writing weird assembly. */
6061 else if (SYMBOL_CALLS_LOCAL (info, h))
6062 {
6063 struct elf_dyn_relocs **pp;
6064
6065 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6066 {
6067 p->count -= p->pc_count;
6068 p->pc_count = 0;
6069 if (p->count == 0)
6070 *pp = p->next;
6071 else
6072 pp = &p->next;
6073 }
6074 }
6075
6076 if (htab->is_vxworks)
6077 {
6078 struct elf_dyn_relocs **pp;
6079
6080 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6081 {
6082 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6083 *pp = p->next;
6084 else
6085 pp = &p->next;
6086 }
6087 }
6088
6089 if (eh->dyn_relocs != NULL)
6090 {
6091 /* Make sure this symbol is output as a dynamic symbol. */
6092 if (!ensure_undef_dynamic (info, h))
6093 return FALSE;
6094 }
6095 }
6096 else if (ELIMINATE_COPY_RELOCS)
6097 {
6098 /* For the non-pic case, discard space for relocs against
6099 symbols which turn out to need copy relocs or are not
6100 dynamic. */
6101 if (!h->non_got_ref
6102 && !h->def_regular
6103 && !(h->protected_def
6104 && eh->has_addr16_ha
6105 && eh->has_addr16_lo
6106 && htab->params->pic_fixup > 0))
6107 {
6108 /* Make sure this symbol is output as a dynamic symbol. */
6109 if (!ensure_undef_dynamic (info, h))
6110 return FALSE;
6111
6112 if (h->dynindx == -1)
6113 eh->dyn_relocs = NULL;
6114 }
6115 else
6116 eh->dyn_relocs = NULL;
6117 }
6118
6119 /* Allocate space. */
6120 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6121 {
6122 asection *sreloc = elf_section_data (p->sec)->sreloc;
6123 if (eh->elf.type == STT_GNU_IFUNC)
6124 sreloc = htab->elf.irelplt;
6125 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6126 }
6127
6128 /* Handle PLT relocs. Done last, after dynindx has settled. */
6129 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6130 if (dyn || h->type == STT_GNU_IFUNC)
6131 {
6132 struct plt_entry *ent;
6133 bfd_boolean doneone = FALSE;
6134 bfd_vma plt_offset = 0, glink_offset = 0;
6135
6136 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6137 if (ent->plt.refcount > 0)
6138 {
6139 asection *s = htab->elf.splt;
6140
6141 if (!dyn)
6142 s = htab->elf.iplt;
6143
6144 if (htab->plt_type == PLT_NEW || !dyn)
6145 {
6146 if (!doneone)
6147 {
6148 plt_offset = s->size;
6149 s->size += 4;
6150 }
6151 ent->plt.offset = plt_offset;
6152
6153 s = htab->glink;
6154 if (!doneone || bfd_link_pic (info))
6155 {
6156 glink_offset = s->size;
6157 s->size += GLINK_ENTRY_SIZE;
6158 if (h == htab->tls_get_addr
6159 && !htab->params->no_tls_get_addr_opt)
6160 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6161 }
6162 if (!doneone
6163 && !bfd_link_pic (info)
6164 && h->def_dynamic
6165 && !h->def_regular)
6166 {
6167 h->root.u.def.section = s;
6168 h->root.u.def.value = glink_offset;
6169 }
6170 ent->glink_offset = glink_offset;
6171
6172 if (htab->params->emit_stub_syms
6173 && !add_stub_sym (ent, h, info))
6174 return FALSE;
6175 }
6176 else
6177 {
6178 if (!doneone)
6179 {
6180 /* If this is the first .plt entry, make room
6181 for the special first entry. */
6182 if (s->size == 0)
6183 s->size += htab->plt_initial_entry_size;
6184
6185 /* The PowerPC PLT is actually composed of two
6186 parts, the first part is 2 words (for a load
6187 and a jump), and then there is a remaining
6188 word available at the end. */
6189 plt_offset = (htab->plt_initial_entry_size
6190 + (htab->plt_slot_size
6191 * ((s->size
6192 - htab->plt_initial_entry_size)
6193 / htab->plt_entry_size)));
6194
6195 /* If this symbol is not defined in a regular
6196 file, and we are not generating a shared
6197 library, then set the symbol to this location
6198 in the .plt. This is to avoid text
6199 relocations, and is required to make
6200 function pointers compare as equal between
6201 the normal executable and the shared library. */
6202 if (! bfd_link_pic (info)
6203 && h->def_dynamic
6204 && !h->def_regular)
6205 {
6206 h->root.u.def.section = s;
6207 h->root.u.def.value = plt_offset;
6208 }
6209
6210 /* Make room for this entry. */
6211 s->size += htab->plt_entry_size;
6212 /* After the 8192nd entry, room for two entries
6213 is allocated. */
6214 if (htab->plt_type == PLT_OLD
6215 && (s->size - htab->plt_initial_entry_size)
6216 / htab->plt_entry_size
6217 > PLT_NUM_SINGLE_ENTRIES)
6218 s->size += htab->plt_entry_size;
6219 }
6220 ent->plt.offset = plt_offset;
6221 }
6222
6223 /* We also need to make an entry in the .rela.plt section. */
6224 if (!doneone)
6225 {
6226 if (!dyn)
6227 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6228 else
6229 {
6230 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6231
6232 if (htab->plt_type == PLT_VXWORKS)
6233 {
6234 /* Allocate space for the unloaded relocations. */
6235 if (!bfd_link_pic (info)
6236 && htab->elf.dynamic_sections_created)
6237 {
6238 if (ent->plt.offset
6239 == (bfd_vma) htab->plt_initial_entry_size)
6240 {
6241 htab->srelplt2->size
6242 += (sizeof (Elf32_External_Rela)
6243 * VXWORKS_PLTRESOLVE_RELOCS);
6244 }
6245
6246 htab->srelplt2->size
6247 += (sizeof (Elf32_External_Rela)
6248 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6249 }
6250
6251 /* Every PLT entry has an associated GOT entry in
6252 .got.plt. */
6253 htab->elf.sgotplt->size += 4;
6254 }
6255 }
6256 doneone = TRUE;
6257 }
6258 }
6259 else
6260 ent->plt.offset = (bfd_vma) -1;
6261
6262 if (!doneone)
6263 {
6264 h->plt.plist = NULL;
6265 h->needs_plt = 0;
6266 }
6267 }
6268 else
6269 {
6270 h->plt.plist = NULL;
6271 h->needs_plt = 0;
6272 }
6273
6274 return TRUE;
6275 }
6276
6277 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6278 read-only sections. */
6279
6280 static bfd_boolean
6281 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6282 {
6283 struct bfd_link_info *info;
6284
6285 if (h->root.type == bfd_link_hash_indirect)
6286 return TRUE;
6287
6288 info = (struct bfd_link_info *) info_p;
6289 if (readonly_dynrelocs (h, info))
6290 {
6291 info->flags |= DF_TEXTREL;
6292
6293 /* Not an error, just cut short the traversal. */
6294 return FALSE;
6295 }
6296 return TRUE;
6297 }
6298
6299 static const unsigned char glink_eh_frame_cie[] =
6300 {
6301 0, 0, 0, 16, /* length. */
6302 0, 0, 0, 0, /* id. */
6303 1, /* CIE version. */
6304 'z', 'R', 0, /* Augmentation string. */
6305 4, /* Code alignment. */
6306 0x7c, /* Data alignment. */
6307 65, /* RA reg. */
6308 1, /* Augmentation size. */
6309 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6310 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6311 };
6312
6313 /* Set the sizes of the dynamic sections. */
6314
6315 static bfd_boolean
6316 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6317 struct bfd_link_info *info)
6318 {
6319 struct ppc_elf_link_hash_table *htab;
6320 asection *s;
6321 bfd_boolean relocs;
6322 bfd *ibfd;
6323
6324 #ifdef DEBUG
6325 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6326 #endif
6327
6328 htab = ppc_elf_hash_table (info);
6329 BFD_ASSERT (htab->elf.dynobj != NULL);
6330
6331 if (elf_hash_table (info)->dynamic_sections_created)
6332 {
6333 /* Set the contents of the .interp section to the interpreter. */
6334 if (bfd_link_executable (info) && !info->nointerp)
6335 {
6336 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6337 BFD_ASSERT (s != NULL);
6338 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6339 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6340 }
6341 }
6342
6343 if (htab->plt_type == PLT_OLD)
6344 htab->got_header_size = 16;
6345 else if (htab->plt_type == PLT_NEW)
6346 htab->got_header_size = 12;
6347
6348 /* Set up .got offsets for local syms, and space for local dynamic
6349 relocs. */
6350 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6351 {
6352 bfd_signed_vma *local_got;
6353 bfd_signed_vma *end_local_got;
6354 struct plt_entry **local_plt;
6355 struct plt_entry **end_local_plt;
6356 char *lgot_masks;
6357 bfd_size_type locsymcount;
6358 Elf_Internal_Shdr *symtab_hdr;
6359
6360 if (!is_ppc_elf (ibfd))
6361 continue;
6362
6363 for (s = ibfd->sections; s != NULL; s = s->next)
6364 {
6365 struct ppc_dyn_relocs *p;
6366
6367 for (p = ((struct ppc_dyn_relocs *)
6368 elf_section_data (s)->local_dynrel);
6369 p != NULL;
6370 p = p->next)
6371 {
6372 if (!bfd_is_abs_section (p->sec)
6373 && bfd_is_abs_section (p->sec->output_section))
6374 {
6375 /* Input section has been discarded, either because
6376 it is a copy of a linkonce section or due to
6377 linker script /DISCARD/, so we'll be discarding
6378 the relocs too. */
6379 }
6380 else if (htab->is_vxworks
6381 && strcmp (p->sec->output_section->name,
6382 ".tls_vars") == 0)
6383 {
6384 /* Relocations in vxworks .tls_vars sections are
6385 handled specially by the loader. */
6386 }
6387 else if (p->count != 0)
6388 {
6389 asection *sreloc = elf_section_data (p->sec)->sreloc;
6390 if (p->ifunc)
6391 sreloc = htab->elf.irelplt;
6392 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6393 if ((p->sec->output_section->flags
6394 & (SEC_READONLY | SEC_ALLOC))
6395 == (SEC_READONLY | SEC_ALLOC))
6396 {
6397 info->flags |= DF_TEXTREL;
6398 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6399 p->sec->owner, p->sec);
6400 }
6401 }
6402 }
6403 }
6404
6405 local_got = elf_local_got_refcounts (ibfd);
6406 if (!local_got)
6407 continue;
6408
6409 symtab_hdr = &elf_symtab_hdr (ibfd);
6410 locsymcount = symtab_hdr->sh_info;
6411 end_local_got = local_got + locsymcount;
6412 local_plt = (struct plt_entry **) end_local_got;
6413 end_local_plt = local_plt + locsymcount;
6414 lgot_masks = (char *) end_local_plt;
6415
6416 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6417 if (*local_got > 0)
6418 {
6419 unsigned int need = 0;
6420 if ((*lgot_masks & TLS_TLS) != 0)
6421 {
6422 if ((*lgot_masks & TLS_GD) != 0)
6423 need += 8;
6424 if ((*lgot_masks & TLS_LD) != 0)
6425 htab->tlsld_got.refcount += 1;
6426 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6427 need += 4;
6428 if ((*lgot_masks & TLS_DTPREL) != 0)
6429 need += 4;
6430 }
6431 else
6432 need += 4;
6433 if (need == 0)
6434 *local_got = (bfd_vma) -1;
6435 else
6436 {
6437 *local_got = allocate_got (htab, need);
6438 if (bfd_link_pic (info))
6439 {
6440 asection *srel = htab->elf.srelgot;
6441 if ((*lgot_masks & PLT_IFUNC) != 0)
6442 srel = htab->elf.irelplt;
6443 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6444 }
6445 }
6446 }
6447 else
6448 *local_got = (bfd_vma) -1;
6449
6450 if (htab->is_vxworks)
6451 continue;
6452
6453 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6454 for (; local_plt < end_local_plt; ++local_plt)
6455 {
6456 struct plt_entry *ent;
6457 bfd_boolean doneone = FALSE;
6458 bfd_vma plt_offset = 0, glink_offset = 0;
6459
6460 for (ent = *local_plt; ent != NULL; ent = ent->next)
6461 if (ent->plt.refcount > 0)
6462 {
6463 s = htab->elf.iplt;
6464
6465 if (!doneone)
6466 {
6467 plt_offset = s->size;
6468 s->size += 4;
6469 }
6470 ent->plt.offset = plt_offset;
6471
6472 s = htab->glink;
6473 if (!doneone || bfd_link_pic (info))
6474 {
6475 glink_offset = s->size;
6476 s->size += GLINK_ENTRY_SIZE;
6477 }
6478 ent->glink_offset = glink_offset;
6479
6480 if (!doneone)
6481 {
6482 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6483 doneone = TRUE;
6484 }
6485 }
6486 else
6487 ent->plt.offset = (bfd_vma) -1;
6488 }
6489 }
6490
6491 /* Allocate space for global sym dynamic relocs. */
6492 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6493
6494 if (htab->tlsld_got.refcount > 0)
6495 {
6496 htab->tlsld_got.offset = allocate_got (htab, 8);
6497 if (bfd_link_pic (info))
6498 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6499 }
6500 else
6501 htab->tlsld_got.offset = (bfd_vma) -1;
6502
6503 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6504 {
6505 unsigned int g_o_t = 32768;
6506
6507 /* If we haven't allocated the header, do so now. When we get here,
6508 for old plt/got the got size will be 0 to 32764 (not allocated),
6509 or 32780 to 65536 (header allocated). For new plt/got, the
6510 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6511 if (htab->elf.sgot->size <= 32768)
6512 {
6513 g_o_t = htab->elf.sgot->size;
6514 if (htab->plt_type == PLT_OLD)
6515 g_o_t += 4;
6516 htab->elf.sgot->size += htab->got_header_size;
6517 }
6518
6519 htab->elf.hgot->root.u.def.value = g_o_t;
6520 }
6521 if (bfd_link_pic (info))
6522 {
6523 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6524
6525 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6526 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6527 }
6528 if (info->emitrelocations)
6529 {
6530 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6531
6532 if (sda != NULL && sda->ref_regular)
6533 sda->root.u.def.section->flags |= SEC_KEEP;
6534 sda = htab->sdata[1].sym;
6535 if (sda != NULL && sda->ref_regular)
6536 sda->root.u.def.section->flags |= SEC_KEEP;
6537 }
6538
6539 if (htab->glink != NULL
6540 && htab->glink->size != 0
6541 && htab->elf.dynamic_sections_created)
6542 {
6543 htab->glink_pltresolve = htab->glink->size;
6544 /* Space for the branch table. ??? We don't need entries for
6545 non-dynamic symbols in this table. This case can arise with
6546 static ifuncs or forced local ifuncs. */
6547 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6548 /* Pad out to align the start of PLTresolve. */
6549 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6550 ? 63 : 15);
6551 htab->glink->size += GLINK_PLTRESOLVE;
6552
6553 if (htab->params->emit_stub_syms)
6554 {
6555 struct elf_link_hash_entry *sh;
6556 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6557 TRUE, FALSE, FALSE);
6558 if (sh == NULL)
6559 return FALSE;
6560 if (sh->root.type == bfd_link_hash_new)
6561 {
6562 sh->root.type = bfd_link_hash_defined;
6563 sh->root.u.def.section = htab->glink;
6564 sh->root.u.def.value = htab->glink_pltresolve;
6565 sh->ref_regular = 1;
6566 sh->def_regular = 1;
6567 sh->ref_regular_nonweak = 1;
6568 sh->forced_local = 1;
6569 sh->non_elf = 0;
6570 sh->root.linker_def = 1;
6571 }
6572 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6573 TRUE, FALSE, FALSE);
6574 if (sh == NULL)
6575 return FALSE;
6576 if (sh->root.type == bfd_link_hash_new)
6577 {
6578 sh->root.type = bfd_link_hash_defined;
6579 sh->root.u.def.section = htab->glink;
6580 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6581 sh->ref_regular = 1;
6582 sh->def_regular = 1;
6583 sh->ref_regular_nonweak = 1;
6584 sh->forced_local = 1;
6585 sh->non_elf = 0;
6586 sh->root.linker_def = 1;
6587 }
6588 }
6589 }
6590
6591 if (htab->glink != NULL
6592 && htab->glink->size != 0
6593 && htab->glink_eh_frame != NULL
6594 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6595 && _bfd_elf_eh_frame_present (info))
6596 {
6597 s = htab->glink_eh_frame;
6598 s->size = sizeof (glink_eh_frame_cie) + 20;
6599 if (bfd_link_pic (info))
6600 {
6601 s->size += 4;
6602 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6603 s->size += 4;
6604 }
6605 }
6606
6607 /* We've now determined the sizes of the various dynamic sections.
6608 Allocate memory for them. */
6609 relocs = FALSE;
6610 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6611 {
6612 bfd_boolean strip_section = TRUE;
6613
6614 if ((s->flags & SEC_LINKER_CREATED) == 0)
6615 continue;
6616
6617 if (s == htab->elf.splt
6618 || s == htab->elf.sgot)
6619 {
6620 /* We'd like to strip these sections if they aren't needed, but if
6621 we've exported dynamic symbols from them we must leave them.
6622 It's too late to tell BFD to get rid of the symbols. */
6623 if (htab->elf.hplt != NULL)
6624 strip_section = FALSE;
6625 /* Strip this section if we don't need it; see the
6626 comment below. */
6627 }
6628 else if (s == htab->elf.iplt
6629 || s == htab->glink
6630 || s == htab->glink_eh_frame
6631 || s == htab->elf.sgotplt
6632 || s == htab->sbss
6633 || s == htab->elf.sdynbss
6634 || s == htab->elf.sdynrelro
6635 || s == htab->dynsbss)
6636 {
6637 /* Strip these too. */
6638 }
6639 else if (s == htab->sdata[0].section
6640 || s == htab->sdata[1].section)
6641 {
6642 strip_section = (s->flags & SEC_KEEP) == 0;
6643 }
6644 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6645 ".rela"))
6646 {
6647 if (s->size != 0)
6648 {
6649 /* Remember whether there are any relocation sections. */
6650 relocs = TRUE;
6651
6652 /* We use the reloc_count field as a counter if we need
6653 to copy relocs into the output file. */
6654 s->reloc_count = 0;
6655 }
6656 }
6657 else
6658 {
6659 /* It's not one of our sections, so don't allocate space. */
6660 continue;
6661 }
6662
6663 if (s->size == 0 && strip_section)
6664 {
6665 /* If we don't need this section, strip it from the
6666 output file. This is mostly to handle .rela.bss and
6667 .rela.plt. We must create both sections in
6668 create_dynamic_sections, because they must be created
6669 before the linker maps input sections to output
6670 sections. The linker does that before
6671 adjust_dynamic_symbol is called, and it is that
6672 function which decides whether anything needs to go
6673 into these sections. */
6674 s->flags |= SEC_EXCLUDE;
6675 continue;
6676 }
6677
6678 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6679 continue;
6680
6681 /* Allocate memory for the section contents. */
6682 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6683 if (s->contents == NULL)
6684 return FALSE;
6685 }
6686
6687 if (htab->elf.dynamic_sections_created)
6688 {
6689 /* Add some entries to the .dynamic section. We fill in the
6690 values later, in ppc_elf_finish_dynamic_sections, but we
6691 must add the entries now so that we get the correct size for
6692 the .dynamic section. The DT_DEBUG entry is filled in by the
6693 dynamic linker and used by the debugger. */
6694 #define add_dynamic_entry(TAG, VAL) \
6695 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6696
6697 if (bfd_link_executable (info))
6698 {
6699 if (!add_dynamic_entry (DT_DEBUG, 0))
6700 return FALSE;
6701 }
6702
6703 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6704 {
6705 if (!add_dynamic_entry (DT_PLTGOT, 0)
6706 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6707 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6708 || !add_dynamic_entry (DT_JMPREL, 0))
6709 return FALSE;
6710 }
6711
6712 if (htab->plt_type == PLT_NEW
6713 && htab->glink != NULL
6714 && htab->glink->size != 0)
6715 {
6716 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6717 return FALSE;
6718 if (!htab->params->no_tls_get_addr_opt
6719 && htab->tls_get_addr != NULL
6720 && htab->tls_get_addr->plt.plist != NULL
6721 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6722 return FALSE;
6723 }
6724
6725 if (relocs)
6726 {
6727 if (!add_dynamic_entry (DT_RELA, 0)
6728 || !add_dynamic_entry (DT_RELASZ, 0)
6729 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6730 return FALSE;
6731 }
6732
6733 /* If any dynamic relocs apply to a read-only section, then we
6734 need a DT_TEXTREL entry. */
6735 if ((info->flags & DF_TEXTREL) == 0)
6736 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6737 info);
6738
6739 if ((info->flags & DF_TEXTREL) != 0)
6740 {
6741 if (!add_dynamic_entry (DT_TEXTREL, 0))
6742 return FALSE;
6743 }
6744 if (htab->is_vxworks
6745 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6746 return FALSE;
6747 }
6748 #undef add_dynamic_entry
6749
6750 if (htab->glink_eh_frame != NULL
6751 && htab->glink_eh_frame->contents != NULL)
6752 {
6753 unsigned char *p = htab->glink_eh_frame->contents;
6754 bfd_vma val;
6755
6756 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6757 /* CIE length (rewrite in case little-endian). */
6758 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6759 p += sizeof (glink_eh_frame_cie);
6760 /* FDE length. */
6761 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6762 bfd_put_32 (htab->elf.dynobj, val, p);
6763 p += 4;
6764 /* CIE pointer. */
6765 val = p - htab->glink_eh_frame->contents;
6766 bfd_put_32 (htab->elf.dynobj, val, p);
6767 p += 4;
6768 /* Offset to .glink. Set later. */
6769 p += 4;
6770 /* .glink size. */
6771 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6772 p += 4;
6773 /* Augmentation. */
6774 p += 1;
6775
6776 if (bfd_link_pic (info)
6777 && htab->elf.dynamic_sections_created)
6778 {
6779 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6780 if (adv < 64)
6781 *p++ = DW_CFA_advance_loc + adv;
6782 else if (adv < 256)
6783 {
6784 *p++ = DW_CFA_advance_loc1;
6785 *p++ = adv;
6786 }
6787 else if (adv < 65536)
6788 {
6789 *p++ = DW_CFA_advance_loc2;
6790 bfd_put_16 (htab->elf.dynobj, adv, p);
6791 p += 2;
6792 }
6793 else
6794 {
6795 *p++ = DW_CFA_advance_loc4;
6796 bfd_put_32 (htab->elf.dynobj, adv, p);
6797 p += 4;
6798 }
6799 *p++ = DW_CFA_register;
6800 *p++ = 65;
6801 p++;
6802 *p++ = DW_CFA_advance_loc + 4;
6803 *p++ = DW_CFA_restore_extended;
6804 *p++ = 65;
6805 }
6806 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6807 == htab->glink_eh_frame->size);
6808 }
6809
6810 return TRUE;
6811 }
6812
6813 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6814 if it looks like nothing is using them. */
6815
6816 static void
6817 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6818 {
6819 struct elf_link_hash_entry *sda = lsect->sym;
6820
6821 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6822 {
6823 asection *s;
6824
6825 s = bfd_get_section_by_name (output_bfd, lsect->name);
6826 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6827 {
6828 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6829 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6830 {
6831 sda->def_regular = 0;
6832 /* This is somewhat magic. See elf_link_output_extsym. */
6833 sda->ref_dynamic = 1;
6834 sda->forced_local = 0;
6835 }
6836 }
6837 }
6838 }
6839
6840 void
6841 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6842 {
6843 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6844
6845 if (htab != NULL)
6846 {
6847 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6848 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6849 }
6850 }
6851
6852
6853 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6854
6855 static bfd_boolean
6856 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6857 {
6858 if (h->plt.plist != NULL
6859 && !h->def_regular
6860 && (!h->pointer_equality_needed
6861 || !h->ref_regular_nonweak))
6862 return FALSE;
6863
6864 return _bfd_elf_hash_symbol (h);
6865 }
6866 \f
6867 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6868
6869 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6870 used for some functions that are allowed to break the ABI). */
6871 static const int shared_stub_entry[] =
6872 {
6873 0x7c0802a6, /* mflr 0 */
6874 0x429f0005, /* bcl 20, 31, .Lxxx */
6875 0x7d8802a6, /* mflr 12 */
6876 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6877 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6878 0x7c0803a6, /* mtlr 0 */
6879 0x7d8903a6, /* mtctr 12 */
6880 0x4e800420, /* bctr */
6881 };
6882
6883 static const int stub_entry[] =
6884 {
6885 0x3d800000, /* lis 12,xxx@ha */
6886 0x398c0000, /* addi 12,12,xxx@l */
6887 0x7d8903a6, /* mtctr 12 */
6888 0x4e800420, /* bctr */
6889 };
6890
6891 struct ppc_elf_relax_info
6892 {
6893 unsigned int workaround_size;
6894 unsigned int picfixup_size;
6895 };
6896
6897 /* This function implements long branch trampolines, and the ppc476
6898 icache bug workaround. Any section needing trampolines or patch
6899 space for the workaround has its size extended so that we can
6900 add trampolines at the end of the section. */
6901
6902 static bfd_boolean
6903 ppc_elf_relax_section (bfd *abfd,
6904 asection *isec,
6905 struct bfd_link_info *link_info,
6906 bfd_boolean *again)
6907 {
6908 struct one_branch_fixup
6909 {
6910 struct one_branch_fixup *next;
6911 asection *tsec;
6912 /* Final link, can use the symbol offset. For a
6913 relocatable link we use the symbol's index. */
6914 bfd_vma toff;
6915 bfd_vma trampoff;
6916 };
6917
6918 Elf_Internal_Shdr *symtab_hdr;
6919 bfd_byte *contents = NULL;
6920 Elf_Internal_Sym *isymbuf = NULL;
6921 Elf_Internal_Rela *internal_relocs = NULL;
6922 Elf_Internal_Rela *irel, *irelend = NULL;
6923 struct one_branch_fixup *branch_fixups = NULL;
6924 struct ppc_elf_relax_info *relax_info = NULL;
6925 unsigned changes = 0;
6926 bfd_boolean workaround_change;
6927 struct ppc_elf_link_hash_table *htab;
6928 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6929 asection *got2;
6930 bfd_boolean maybe_pasted;
6931
6932 *again = FALSE;
6933
6934 /* No need to do anything with non-alloc or non-code sections. */
6935 if ((isec->flags & SEC_ALLOC) == 0
6936 || (isec->flags & SEC_CODE) == 0
6937 || (isec->flags & SEC_LINKER_CREATED) != 0
6938 || isec->size < 4)
6939 return TRUE;
6940
6941 /* We cannot represent the required PIC relocs in the output, so don't
6942 do anything. The linker doesn't support mixing -shared and -r
6943 anyway. */
6944 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6945 return TRUE;
6946
6947 htab = ppc_elf_hash_table (link_info);
6948 if (htab == NULL)
6949 return TRUE;
6950
6951 isec->size = (isec->size + 3) & -4;
6952 if (isec->rawsize == 0)
6953 isec->rawsize = isec->size;
6954 trampbase = isec->size;
6955
6956 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6957 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6958 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6959
6960 if (htab->params->ppc476_workaround
6961 || htab->params->pic_fixup > 0)
6962 {
6963 if (elf_section_data (isec)->sec_info == NULL)
6964 {
6965 elf_section_data (isec)->sec_info
6966 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6967 if (elf_section_data (isec)->sec_info == NULL)
6968 return FALSE;
6969 }
6970 relax_info = elf_section_data (isec)->sec_info;
6971 trampbase -= relax_info->workaround_size;
6972 }
6973
6974 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6975 || strcmp (isec->output_section->name, ".fini") == 0);
6976 /* Space for a branch around any trampolines. */
6977 trampoff = trampbase;
6978 if (maybe_pasted && trampbase == isec->rawsize)
6979 trampoff += 4;
6980
6981 symtab_hdr = &elf_symtab_hdr (abfd);
6982 picfixup_size = 0;
6983 if (htab->params->branch_trampolines
6984 || htab->params->pic_fixup > 0)
6985 {
6986 /* Get a copy of the native relocations. */
6987 if (isec->reloc_count != 0)
6988 {
6989 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6990 link_info->keep_memory);
6991 if (internal_relocs == NULL)
6992 goto error_return;
6993 }
6994
6995 got2 = bfd_get_section_by_name (abfd, ".got2");
6996
6997 irelend = internal_relocs + isec->reloc_count;
6998 for (irel = internal_relocs; irel < irelend; irel++)
6999 {
7000 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7001 bfd_vma toff, roff;
7002 asection *tsec;
7003 struct one_branch_fixup *f;
7004 size_t insn_offset = 0;
7005 bfd_vma max_branch_offset = 0, val;
7006 bfd_byte *hit_addr;
7007 unsigned long t0;
7008 struct elf_link_hash_entry *h;
7009 struct plt_entry **plist;
7010 unsigned char sym_type;
7011
7012 switch (r_type)
7013 {
7014 case R_PPC_REL24:
7015 case R_PPC_LOCAL24PC:
7016 case R_PPC_PLTREL24:
7017 max_branch_offset = 1 << 25;
7018 break;
7019
7020 case R_PPC_REL14:
7021 case R_PPC_REL14_BRTAKEN:
7022 case R_PPC_REL14_BRNTAKEN:
7023 max_branch_offset = 1 << 15;
7024 break;
7025
7026 case R_PPC_ADDR16_HA:
7027 if (htab->params->pic_fixup > 0)
7028 break;
7029 continue;
7030
7031 default:
7032 continue;
7033 }
7034
7035 /* Get the value of the symbol referred to by the reloc. */
7036 h = NULL;
7037 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7038 {
7039 /* A local symbol. */
7040 Elf_Internal_Sym *isym;
7041
7042 /* Read this BFD's local symbols. */
7043 if (isymbuf == NULL)
7044 {
7045 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7046 if (isymbuf == NULL)
7047 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7048 symtab_hdr->sh_info, 0,
7049 NULL, NULL, NULL);
7050 if (isymbuf == 0)
7051 goto error_return;
7052 }
7053 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7054 if (isym->st_shndx == SHN_UNDEF)
7055 tsec = bfd_und_section_ptr;
7056 else if (isym->st_shndx == SHN_ABS)
7057 tsec = bfd_abs_section_ptr;
7058 else if (isym->st_shndx == SHN_COMMON)
7059 tsec = bfd_com_section_ptr;
7060 else
7061 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7062
7063 toff = isym->st_value;
7064 sym_type = ELF_ST_TYPE (isym->st_info);
7065 }
7066 else
7067 {
7068 /* Global symbol handling. */
7069 unsigned long indx;
7070
7071 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7072 h = elf_sym_hashes (abfd)[indx];
7073
7074 while (h->root.type == bfd_link_hash_indirect
7075 || h->root.type == bfd_link_hash_warning)
7076 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7077
7078 if (h->root.type == bfd_link_hash_defined
7079 || h->root.type == bfd_link_hash_defweak)
7080 {
7081 tsec = h->root.u.def.section;
7082 toff = h->root.u.def.value;
7083 }
7084 else if (h->root.type == bfd_link_hash_undefined
7085 || h->root.type == bfd_link_hash_undefweak)
7086 {
7087 tsec = bfd_und_section_ptr;
7088 toff = bfd_link_relocatable (link_info) ? indx : 0;
7089 }
7090 else
7091 continue;
7092
7093 /* If this branch is to __tls_get_addr then we may later
7094 optimise away the call. We won't be needing a long-
7095 branch stub in that case. */
7096 if (bfd_link_executable (link_info)
7097 && h == htab->tls_get_addr
7098 && irel != internal_relocs)
7099 {
7100 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7101 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7102 unsigned int tls_mask = 0;
7103
7104 /* The previous reloc should be one of R_PPC_TLSGD or
7105 R_PPC_TLSLD, or for older object files, a reloc
7106 on the __tls_get_addr arg setup insn. Get tls
7107 mask bits from the symbol on that reloc. */
7108 if (t_symndx < symtab_hdr->sh_info)
7109 {
7110 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7111
7112 if (local_got_offsets != NULL)
7113 {
7114 struct plt_entry **local_plt = (struct plt_entry **)
7115 (local_got_offsets + symtab_hdr->sh_info);
7116 char *lgot_masks = (char *)
7117 (local_plt + symtab_hdr->sh_info);
7118 tls_mask = lgot_masks[t_symndx];
7119 }
7120 }
7121 else
7122 {
7123 struct elf_link_hash_entry *th
7124 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7125
7126 while (th->root.type == bfd_link_hash_indirect
7127 || th->root.type == bfd_link_hash_warning)
7128 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7129
7130 tls_mask
7131 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7132 }
7133
7134 /* The mask bits tell us if the call will be
7135 optimised away. */
7136 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7137 && (t_rtype == R_PPC_TLSGD
7138 || t_rtype == R_PPC_GOT_TLSGD16
7139 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7140 continue;
7141 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7142 && (t_rtype == R_PPC_TLSLD
7143 || t_rtype == R_PPC_GOT_TLSLD16
7144 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7145 continue;
7146 }
7147
7148 sym_type = h->type;
7149 }
7150
7151 if (r_type == R_PPC_ADDR16_HA)
7152 {
7153 if (h != NULL
7154 && !h->def_regular
7155 && h->protected_def
7156 && ppc_elf_hash_entry (h)->has_addr16_ha
7157 && ppc_elf_hash_entry (h)->has_addr16_lo)
7158 picfixup_size += 12;
7159 continue;
7160 }
7161
7162 /* The condition here under which we call find_plt_ent must
7163 match that in relocate_section. If we call find_plt_ent here
7164 but not in relocate_section, or vice versa, then the branch
7165 destination used here may be incorrect. */
7166 plist = NULL;
7167 if (h != NULL)
7168 {
7169 /* We know is_branch_reloc (r_type) is true. */
7170 if (h->type == STT_GNU_IFUNC
7171 || r_type == R_PPC_PLTREL24)
7172 plist = &h->plt.plist;
7173 }
7174 else if (sym_type == STT_GNU_IFUNC
7175 && elf_local_got_offsets (abfd) != NULL)
7176 {
7177 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7178 struct plt_entry **local_plt = (struct plt_entry **)
7179 (local_got_offsets + symtab_hdr->sh_info);
7180 plist = local_plt + ELF32_R_SYM (irel->r_info);
7181 }
7182 if (plist != NULL)
7183 {
7184 bfd_vma addend = 0;
7185 struct plt_entry *ent;
7186
7187 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7188 addend = irel->r_addend;
7189 ent = find_plt_ent (plist, got2, addend);
7190 if (ent != NULL)
7191 {
7192 if (htab->plt_type == PLT_NEW
7193 || h == NULL
7194 || !htab->elf.dynamic_sections_created
7195 || h->dynindx == -1)
7196 {
7197 tsec = htab->glink;
7198 toff = ent->glink_offset;
7199 }
7200 else
7201 {
7202 tsec = htab->elf.splt;
7203 toff = ent->plt.offset;
7204 }
7205 }
7206 }
7207
7208 /* If the branch and target are in the same section, you have
7209 no hope of adding stubs. We'll error out later should the
7210 branch overflow. */
7211 if (tsec == isec)
7212 continue;
7213
7214 /* There probably isn't any reason to handle symbols in
7215 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7216 attribute for a code section, and we are only looking at
7217 branches. However, implement it correctly here as a
7218 reference for other target relax_section functions. */
7219 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7220 {
7221 /* At this stage in linking, no SEC_MERGE symbol has been
7222 adjusted, so all references to such symbols need to be
7223 passed through _bfd_merged_section_offset. (Later, in
7224 relocate_section, all SEC_MERGE symbols *except* for
7225 section symbols have been adjusted.)
7226
7227 gas may reduce relocations against symbols in SEC_MERGE
7228 sections to a relocation against the section symbol when
7229 the original addend was zero. When the reloc is against
7230 a section symbol we should include the addend in the
7231 offset passed to _bfd_merged_section_offset, since the
7232 location of interest is the original symbol. On the
7233 other hand, an access to "sym+addend" where "sym" is not
7234 a section symbol should not include the addend; Such an
7235 access is presumed to be an offset from "sym"; The
7236 location of interest is just "sym". */
7237 if (sym_type == STT_SECTION)
7238 toff += irel->r_addend;
7239
7240 toff
7241 = _bfd_merged_section_offset (abfd, &tsec,
7242 elf_section_data (tsec)->sec_info,
7243 toff);
7244
7245 if (sym_type != STT_SECTION)
7246 toff += irel->r_addend;
7247 }
7248 /* PLTREL24 addends are special. */
7249 else if (r_type != R_PPC_PLTREL24)
7250 toff += irel->r_addend;
7251
7252 /* Attempted -shared link of non-pic code loses. */
7253 if ((!bfd_link_relocatable (link_info)
7254 && tsec == bfd_und_section_ptr)
7255 || tsec->output_section == NULL
7256 || (tsec->owner != NULL
7257 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7258 continue;
7259
7260 roff = irel->r_offset;
7261
7262 /* If the branch is in range, no need to do anything. */
7263 if (tsec != bfd_und_section_ptr
7264 && (!bfd_link_relocatable (link_info)
7265 /* A relocatable link may have sections moved during
7266 final link, so do not presume they remain in range. */
7267 || tsec->output_section == isec->output_section))
7268 {
7269 bfd_vma symaddr, reladdr;
7270
7271 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7272 reladdr = isec->output_section->vma + isec->output_offset + roff;
7273 if (symaddr - reladdr + max_branch_offset
7274 < 2 * max_branch_offset)
7275 continue;
7276 }
7277
7278 /* Look for an existing fixup to this address. */
7279 for (f = branch_fixups; f ; f = f->next)
7280 if (f->tsec == tsec && f->toff == toff)
7281 break;
7282
7283 if (f == NULL)
7284 {
7285 size_t size;
7286 unsigned long stub_rtype;
7287
7288 val = trampoff - roff;
7289 if (val >= max_branch_offset)
7290 /* Oh dear, we can't reach a trampoline. Don't try to add
7291 one. We'll report an error later. */
7292 continue;
7293
7294 if (bfd_link_pic (link_info))
7295 {
7296 size = 4 * ARRAY_SIZE (shared_stub_entry);
7297 insn_offset = 12;
7298 }
7299 else
7300 {
7301 size = 4 * ARRAY_SIZE (stub_entry);
7302 insn_offset = 0;
7303 }
7304 stub_rtype = R_PPC_RELAX;
7305 if (tsec == htab->elf.splt
7306 || tsec == htab->glink)
7307 {
7308 stub_rtype = R_PPC_RELAX_PLT;
7309 if (r_type == R_PPC_PLTREL24)
7310 stub_rtype = R_PPC_RELAX_PLTREL24;
7311 }
7312
7313 /* Hijack the old relocation. Since we need two
7314 relocations for this use a "composite" reloc. */
7315 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7316 stub_rtype);
7317 irel->r_offset = trampoff + insn_offset;
7318 if (r_type == R_PPC_PLTREL24
7319 && stub_rtype != R_PPC_RELAX_PLTREL24)
7320 irel->r_addend = 0;
7321
7322 /* Record the fixup so we don't do it again this section. */
7323 f = bfd_malloc (sizeof (*f));
7324 f->next = branch_fixups;
7325 f->tsec = tsec;
7326 f->toff = toff;
7327 f->trampoff = trampoff;
7328 branch_fixups = f;
7329
7330 trampoff += size;
7331 changes++;
7332 }
7333 else
7334 {
7335 val = f->trampoff - roff;
7336 if (val >= max_branch_offset)
7337 continue;
7338
7339 /* Nop out the reloc, since we're finalizing things here. */
7340 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7341 }
7342
7343 /* Get the section contents. */
7344 if (contents == NULL)
7345 {
7346 /* Get cached copy if it exists. */
7347 if (elf_section_data (isec)->this_hdr.contents != NULL)
7348 contents = elf_section_data (isec)->this_hdr.contents;
7349 /* Go get them off disk. */
7350 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7351 goto error_return;
7352 }
7353
7354 /* Fix up the existing branch to hit the trampoline. */
7355 hit_addr = contents + roff;
7356 switch (r_type)
7357 {
7358 case R_PPC_REL24:
7359 case R_PPC_LOCAL24PC:
7360 case R_PPC_PLTREL24:
7361 t0 = bfd_get_32 (abfd, hit_addr);
7362 t0 &= ~0x3fffffc;
7363 t0 |= val & 0x3fffffc;
7364 bfd_put_32 (abfd, t0, hit_addr);
7365 break;
7366
7367 case R_PPC_REL14:
7368 case R_PPC_REL14_BRTAKEN:
7369 case R_PPC_REL14_BRNTAKEN:
7370 t0 = bfd_get_32 (abfd, hit_addr);
7371 t0 &= ~0xfffc;
7372 t0 |= val & 0xfffc;
7373 bfd_put_32 (abfd, t0, hit_addr);
7374 break;
7375 }
7376 }
7377
7378 while (branch_fixups != NULL)
7379 {
7380 struct one_branch_fixup *f = branch_fixups;
7381 branch_fixups = branch_fixups->next;
7382 free (f);
7383 }
7384 }
7385
7386 workaround_change = FALSE;
7387 newsize = trampoff;
7388 if (htab->params->ppc476_workaround
7389 && (!bfd_link_relocatable (link_info)
7390 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7391 {
7392 bfd_vma addr, end_addr;
7393 unsigned int crossings;
7394 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7395
7396 addr = isec->output_section->vma + isec->output_offset;
7397 end_addr = addr + trampoff;
7398 addr &= -pagesize;
7399 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7400 if (crossings != 0)
7401 {
7402 /* Keep space aligned, to ensure the patch code itself does
7403 not cross a page. Don't decrease size calculated on a
7404 previous pass as otherwise we might never settle on a layout. */
7405 newsize = 15 - ((end_addr - 1) & 15);
7406 newsize += crossings * 16;
7407 if (relax_info->workaround_size < newsize)
7408 {
7409 relax_info->workaround_size = newsize;
7410 workaround_change = TRUE;
7411 }
7412 /* Ensure relocate_section is called. */
7413 isec->flags |= SEC_RELOC;
7414 }
7415 newsize = trampoff + relax_info->workaround_size;
7416 }
7417
7418 if (htab->params->pic_fixup > 0)
7419 {
7420 picfixup_size -= relax_info->picfixup_size;
7421 if (picfixup_size != 0)
7422 relax_info->picfixup_size += picfixup_size;
7423 newsize += relax_info->picfixup_size;
7424 }
7425
7426 if (changes != 0 || picfixup_size != 0 || workaround_change)
7427 isec->size = newsize;
7428
7429 if (isymbuf != NULL
7430 && symtab_hdr->contents != (unsigned char *) isymbuf)
7431 {
7432 if (! link_info->keep_memory)
7433 free (isymbuf);
7434 else
7435 {
7436 /* Cache the symbols for elf_link_input_bfd. */
7437 symtab_hdr->contents = (unsigned char *) isymbuf;
7438 }
7439 }
7440
7441 if (contents != NULL
7442 && elf_section_data (isec)->this_hdr.contents != contents)
7443 {
7444 if (!changes && !link_info->keep_memory)
7445 free (contents);
7446 else
7447 {
7448 /* Cache the section contents for elf_link_input_bfd. */
7449 elf_section_data (isec)->this_hdr.contents = contents;
7450 }
7451 }
7452
7453 changes += picfixup_size;
7454 if (changes != 0)
7455 {
7456 /* Append sufficient NOP relocs so we can write out relocation
7457 information for the trampolines. */
7458 Elf_Internal_Shdr *rel_hdr;
7459 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7460 * sizeof (*new_relocs));
7461 unsigned ix;
7462
7463 if (!new_relocs)
7464 goto error_return;
7465 memcpy (new_relocs, internal_relocs,
7466 isec->reloc_count * sizeof (*new_relocs));
7467 for (ix = changes; ix--;)
7468 {
7469 irel = new_relocs + ix + isec->reloc_count;
7470
7471 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7472 }
7473 if (internal_relocs != elf_section_data (isec)->relocs)
7474 free (internal_relocs);
7475 elf_section_data (isec)->relocs = new_relocs;
7476 isec->reloc_count += changes;
7477 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7478 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7479 }
7480 else if (internal_relocs != NULL
7481 && elf_section_data (isec)->relocs != internal_relocs)
7482 free (internal_relocs);
7483
7484 *again = changes != 0 || workaround_change;
7485 return TRUE;
7486
7487 error_return:
7488 while (branch_fixups != NULL)
7489 {
7490 struct one_branch_fixup *f = branch_fixups;
7491 branch_fixups = branch_fixups->next;
7492 free (f);
7493 }
7494 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7495 free (isymbuf);
7496 if (contents != NULL
7497 && elf_section_data (isec)->this_hdr.contents != contents)
7498 free (contents);
7499 if (internal_relocs != NULL
7500 && elf_section_data (isec)->relocs != internal_relocs)
7501 free (internal_relocs);
7502 return FALSE;
7503 }
7504 \f
7505 /* What to do when ld finds relocations against symbols defined in
7506 discarded sections. */
7507
7508 static unsigned int
7509 ppc_elf_action_discarded (asection *sec)
7510 {
7511 if (strcmp (".fixup", sec->name) == 0)
7512 return 0;
7513
7514 if (strcmp (".got2", sec->name) == 0)
7515 return 0;
7516
7517 return _bfd_elf_default_action_discarded (sec);
7518 }
7519 \f
7520 /* Fill in the address for a pointer generated in a linker section. */
7521
7522 static bfd_vma
7523 elf_finish_pointer_linker_section (bfd *input_bfd,
7524 elf_linker_section_t *lsect,
7525 struct elf_link_hash_entry *h,
7526 bfd_vma relocation,
7527 const Elf_Internal_Rela *rel)
7528 {
7529 elf_linker_section_pointers_t *linker_section_ptr;
7530
7531 BFD_ASSERT (lsect != NULL);
7532
7533 if (h != NULL)
7534 {
7535 /* Handle global symbol. */
7536 struct ppc_elf_link_hash_entry *eh;
7537
7538 eh = (struct ppc_elf_link_hash_entry *) h;
7539 BFD_ASSERT (eh->elf.def_regular);
7540 linker_section_ptr = eh->linker_section_pointer;
7541 }
7542 else
7543 {
7544 /* Handle local symbol. */
7545 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7546
7547 BFD_ASSERT (is_ppc_elf (input_bfd));
7548 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7549 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7550 }
7551
7552 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7553 rel->r_addend,
7554 lsect);
7555 BFD_ASSERT (linker_section_ptr != NULL);
7556
7557 /* Offset will always be a multiple of four, so use the bottom bit
7558 as a "written" flag. */
7559 if ((linker_section_ptr->offset & 1) == 0)
7560 {
7561 bfd_put_32 (lsect->section->owner,
7562 relocation + linker_section_ptr->addend,
7563 lsect->section->contents + linker_section_ptr->offset);
7564 linker_section_ptr->offset += 1;
7565 }
7566
7567 relocation = (lsect->section->output_section->vma
7568 + lsect->section->output_offset
7569 + linker_section_ptr->offset - 1
7570 - SYM_VAL (lsect->sym));
7571
7572 #ifdef DEBUG
7573 fprintf (stderr,
7574 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7575 lsect->name, (long) relocation, (long) relocation);
7576 #endif
7577
7578 return relocation;
7579 }
7580
7581 #define PPC_LO(v) ((v) & 0xffff)
7582 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7583 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7584
7585 static void
7586 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7587 struct bfd_link_info *info)
7588 {
7589 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7590 bfd *output_bfd = info->output_bfd;
7591 bfd_vma plt;
7592
7593 plt = ((ent->plt.offset & ~1)
7594 + plt_sec->output_section->vma
7595 + plt_sec->output_offset);
7596
7597 if (bfd_link_pic (info))
7598 {
7599 bfd_vma got = 0;
7600
7601 if (ent->addend >= 32768)
7602 got = (ent->addend
7603 + ent->sec->output_section->vma
7604 + ent->sec->output_offset);
7605 else if (htab->elf.hgot != NULL)
7606 got = SYM_VAL (htab->elf.hgot);
7607
7608 plt -= got;
7609
7610 if (plt + 0x8000 < 0x10000)
7611 {
7612 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7613 p += 4;
7614 bfd_put_32 (output_bfd, MTCTR_11, p);
7615 p += 4;
7616 bfd_put_32 (output_bfd, BCTR, p);
7617 p += 4;
7618 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7619 p += 4;
7620 }
7621 else
7622 {
7623 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7624 p += 4;
7625 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7626 p += 4;
7627 bfd_put_32 (output_bfd, MTCTR_11, p);
7628 p += 4;
7629 bfd_put_32 (output_bfd, BCTR, p);
7630 p += 4;
7631 }
7632 }
7633 else
7634 {
7635 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7636 p += 4;
7637 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7638 p += 4;
7639 bfd_put_32 (output_bfd, MTCTR_11, p);
7640 p += 4;
7641 bfd_put_32 (output_bfd, BCTR, p);
7642 p += 4;
7643 }
7644 }
7645
7646 /* Return true if symbol is defined statically. */
7647
7648 static bfd_boolean
7649 is_static_defined (struct elf_link_hash_entry *h)
7650 {
7651 return ((h->root.type == bfd_link_hash_defined
7652 || h->root.type == bfd_link_hash_defweak)
7653 && h->root.u.def.section != NULL
7654 && h->root.u.def.section->output_section != NULL);
7655 }
7656
7657 /* If INSN is an opcode that may be used with an @tls operand, return
7658 the transformed insn for TLS optimisation, otherwise return 0. If
7659 REG is non-zero only match an insn with RB or RA equal to REG. */
7660
7661 unsigned int
7662 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7663 {
7664 unsigned int rtra;
7665
7666 if ((insn & (0x3f << 26)) != 31 << 26)
7667 return 0;
7668
7669 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7670 rtra = insn & ((1 << 26) - (1 << 16));
7671 else if (((insn >> 16) & 0x1f) == reg)
7672 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7673 else
7674 return 0;
7675
7676 if ((insn & (0x3ff << 1)) == 266 << 1)
7677 /* add -> addi. */
7678 insn = 14 << 26;
7679 else if ((insn & (0x1f << 1)) == 23 << 1
7680 && ((insn & (0x1f << 6)) < 14 << 6
7681 || ((insn & (0x1f << 6)) >= 16 << 6
7682 && (insn & (0x1f << 6)) < 24 << 6)))
7683 /* load and store indexed -> dform. */
7684 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7685 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7686 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7687 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7688 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7689 /* lwax -> lwa. */
7690 insn = (58 << 26) | 2;
7691 else
7692 return 0;
7693 insn |= rtra;
7694 return insn;
7695 }
7696
7697 /* If INSN is an opcode that may be used with an @tprel operand, return
7698 the transformed insn for an undefined weak symbol, ie. with the
7699 thread pointer REG operand removed. Otherwise return 0. */
7700
7701 unsigned int
7702 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7703 {
7704 if ((insn & (0x1f << 16)) == reg << 16
7705 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7706 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7707 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7708 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7709 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7710 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7711 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7712 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7713 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7714 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7715 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7716 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7717 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7718 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7719 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7720 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7721 && (insn & 3) != 1)
7722 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7723 && ((insn & 3) == 0 || (insn & 3) == 3))))
7724 {
7725 insn &= ~(0x1f << 16);
7726 }
7727 else if ((insn & (0x1f << 21)) == reg << 21
7728 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7729 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7730 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7731 {
7732 insn &= ~(0x1f << 21);
7733 insn |= (insn & (0x1f << 16)) << 5;
7734 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7735 insn -= 2 >> 26; /* convert to ori,oris */
7736 }
7737 else
7738 insn = 0;
7739 return insn;
7740 }
7741
7742 static bfd_boolean
7743 is_insn_ds_form (unsigned int insn)
7744 {
7745 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7746 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7747 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7748 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7749 }
7750
7751 static bfd_boolean
7752 is_insn_dq_form (unsigned int insn)
7753 {
7754 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7755 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7756 && (insn & 3) == 1));
7757 }
7758
7759 /* The RELOCATE_SECTION function is called by the ELF backend linker
7760 to handle the relocations for a section.
7761
7762 The relocs are always passed as Rela structures; if the section
7763 actually uses Rel structures, the r_addend field will always be
7764 zero.
7765
7766 This function is responsible for adjust the section contents as
7767 necessary, and (if using Rela relocs and generating a
7768 relocatable output file) adjusting the reloc addend as
7769 necessary.
7770
7771 This function does not have to worry about setting the reloc
7772 address or the reloc symbol index.
7773
7774 LOCAL_SYMS is a pointer to the swapped in local symbols.
7775
7776 LOCAL_SECTIONS is an array giving the section in the input file
7777 corresponding to the st_shndx field of each local symbol.
7778
7779 The global hash table entry for the global symbols can be found
7780 via elf_sym_hashes (input_bfd).
7781
7782 When generating relocatable output, this function must handle
7783 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7784 going to be the section symbol corresponding to the output
7785 section, which means that the addend must be adjusted
7786 accordingly. */
7787
7788 static bfd_boolean
7789 ppc_elf_relocate_section (bfd *output_bfd,
7790 struct bfd_link_info *info,
7791 bfd *input_bfd,
7792 asection *input_section,
7793 bfd_byte *contents,
7794 Elf_Internal_Rela *relocs,
7795 Elf_Internal_Sym *local_syms,
7796 asection **local_sections)
7797 {
7798 Elf_Internal_Shdr *symtab_hdr;
7799 struct elf_link_hash_entry **sym_hashes;
7800 struct ppc_elf_link_hash_table *htab;
7801 Elf_Internal_Rela *rel;
7802 Elf_Internal_Rela *wrel;
7803 Elf_Internal_Rela *relend;
7804 Elf_Internal_Rela outrel;
7805 asection *got2;
7806 bfd_vma *local_got_offsets;
7807 bfd_boolean ret = TRUE;
7808 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7809 bfd_boolean is_vxworks_tls;
7810 unsigned int picfixup_size = 0;
7811 struct ppc_elf_relax_info *relax_info = NULL;
7812
7813 #ifdef DEBUG
7814 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7815 "%ld relocations%s",
7816 input_bfd, input_section,
7817 (long) input_section->reloc_count,
7818 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7819 #endif
7820
7821 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7822
7823 /* Initialize howto table if not already done. */
7824 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7825 ppc_elf_howto_init ();
7826
7827 htab = ppc_elf_hash_table (info);
7828 local_got_offsets = elf_local_got_offsets (input_bfd);
7829 symtab_hdr = &elf_symtab_hdr (input_bfd);
7830 sym_hashes = elf_sym_hashes (input_bfd);
7831 /* We have to handle relocations in vxworks .tls_vars sections
7832 specially, because the dynamic loader is 'weird'. */
7833 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7834 && !strcmp (input_section->output_section->name,
7835 ".tls_vars"));
7836 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7837 relax_info = elf_section_data (input_section)->sec_info;
7838 rel = wrel = relocs;
7839 relend = relocs + input_section->reloc_count;
7840 for (; rel < relend; wrel++, rel++)
7841 {
7842 enum elf_ppc_reloc_type r_type;
7843 bfd_vma addend;
7844 bfd_reloc_status_type r;
7845 Elf_Internal_Sym *sym;
7846 asection *sec;
7847 struct elf_link_hash_entry *h;
7848 const char *sym_name;
7849 reloc_howto_type *howto;
7850 unsigned long r_symndx;
7851 bfd_vma relocation;
7852 bfd_vma branch_bit, from;
7853 bfd_boolean unresolved_reloc;
7854 bfd_boolean warned;
7855 unsigned int tls_type, tls_mask, tls_gd;
7856 struct plt_entry **ifunc;
7857 struct reloc_howto_struct alt_howto;
7858
7859 again:
7860 r_type = ELF32_R_TYPE (rel->r_info);
7861 sym = NULL;
7862 sec = NULL;
7863 h = NULL;
7864 unresolved_reloc = FALSE;
7865 warned = FALSE;
7866 r_symndx = ELF32_R_SYM (rel->r_info);
7867
7868 if (r_symndx < symtab_hdr->sh_info)
7869 {
7870 sym = local_syms + r_symndx;
7871 sec = local_sections[r_symndx];
7872 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7873
7874 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7875 }
7876 else
7877 {
7878 bfd_boolean ignored;
7879
7880 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7881 r_symndx, symtab_hdr, sym_hashes,
7882 h, sec, relocation,
7883 unresolved_reloc, warned, ignored);
7884
7885 sym_name = h->root.root.string;
7886 }
7887
7888 if (sec != NULL && discarded_section (sec))
7889 {
7890 /* For relocs against symbols from removed linkonce sections,
7891 or sections discarded by a linker script, we just want the
7892 section contents zeroed. Avoid any special processing. */
7893 howto = NULL;
7894 if (r_type < R_PPC_max)
7895 howto = ppc_elf_howto_table[r_type];
7896
7897 _bfd_clear_contents (howto, input_bfd, input_section,
7898 contents + rel->r_offset);
7899 wrel->r_offset = rel->r_offset;
7900 wrel->r_info = 0;
7901 wrel->r_addend = 0;
7902
7903 /* For ld -r, remove relocations in debug sections against
7904 symbols defined in discarded sections. Not done for
7905 non-debug to preserve relocs in .eh_frame which the
7906 eh_frame editing code expects to be present. */
7907 if (bfd_link_relocatable (info)
7908 && (input_section->flags & SEC_DEBUGGING))
7909 wrel--;
7910
7911 continue;
7912 }
7913
7914 if (bfd_link_relocatable (info))
7915 {
7916 if (got2 != NULL
7917 && r_type == R_PPC_PLTREL24
7918 && rel->r_addend != 0)
7919 {
7920 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7921 addend specifies the GOT pointer offset within .got2. */
7922 rel->r_addend += got2->output_offset;
7923 }
7924 if (r_type != R_PPC_RELAX_PLT
7925 && r_type != R_PPC_RELAX_PLTREL24
7926 && r_type != R_PPC_RELAX)
7927 goto copy_reloc;
7928 }
7929
7930 /* TLS optimizations. Replace instruction sequences and relocs
7931 based on information we collected in tls_optimize. We edit
7932 RELOCS so that --emit-relocs will output something sensible
7933 for the final instruction stream. */
7934 tls_mask = 0;
7935 tls_gd = 0;
7936 if (h != NULL)
7937 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7938 else if (local_got_offsets != NULL)
7939 {
7940 struct plt_entry **local_plt;
7941 char *lgot_masks;
7942 local_plt
7943 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7944 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7945 tls_mask = lgot_masks[r_symndx];
7946 }
7947
7948 /* Ensure reloc mapping code below stays sane. */
7949 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7950 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7951 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7952 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7953 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7954 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7955 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7956 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7957 abort ();
7958 switch (r_type)
7959 {
7960 default:
7961 break;
7962
7963 case R_PPC_GOT_TPREL16:
7964 case R_PPC_GOT_TPREL16_LO:
7965 if ((tls_mask & TLS_TLS) != 0
7966 && (tls_mask & TLS_TPREL) == 0)
7967 {
7968 bfd_vma insn;
7969
7970 insn = bfd_get_32 (input_bfd,
7971 contents + rel->r_offset - d_offset);
7972 insn &= 31 << 21;
7973 insn |= 0x3c020000; /* addis 0,2,0 */
7974 bfd_put_32 (input_bfd, insn,
7975 contents + rel->r_offset - d_offset);
7976 r_type = R_PPC_TPREL16_HA;
7977 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7978 }
7979 break;
7980
7981 case R_PPC_TLS:
7982 if ((tls_mask & TLS_TLS) != 0
7983 && (tls_mask & TLS_TPREL) == 0)
7984 {
7985 bfd_vma insn;
7986
7987 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7988 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7989 if (insn == 0)
7990 abort ();
7991 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7992 r_type = R_PPC_TPREL16_LO;
7993 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7994
7995 /* Was PPC_TLS which sits on insn boundary, now
7996 PPC_TPREL16_LO which is at low-order half-word. */
7997 rel->r_offset += d_offset;
7998 }
7999 break;
8000
8001 case R_PPC_GOT_TLSGD16_HI:
8002 case R_PPC_GOT_TLSGD16_HA:
8003 tls_gd = TLS_TPRELGD;
8004 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8005 goto tls_gdld_hi;
8006 break;
8007
8008 case R_PPC_GOT_TLSLD16_HI:
8009 case R_PPC_GOT_TLSLD16_HA:
8010 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8011 {
8012 tls_gdld_hi:
8013 if ((tls_mask & tls_gd) != 0)
8014 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8015 + R_PPC_GOT_TPREL16);
8016 else
8017 {
8018 rel->r_offset -= d_offset;
8019 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8020 r_type = R_PPC_NONE;
8021 }
8022 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8023 }
8024 break;
8025
8026 case R_PPC_GOT_TLSGD16:
8027 case R_PPC_GOT_TLSGD16_LO:
8028 tls_gd = TLS_TPRELGD;
8029 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8030 goto tls_ldgd_opt;
8031 break;
8032
8033 case R_PPC_GOT_TLSLD16:
8034 case R_PPC_GOT_TLSLD16_LO:
8035 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8036 {
8037 unsigned int insn1, insn2;
8038 bfd_vma offset;
8039
8040 tls_ldgd_opt:
8041 offset = (bfd_vma) -1;
8042 /* If not using the newer R_PPC_TLSGD/LD to mark
8043 __tls_get_addr calls, we must trust that the call
8044 stays with its arg setup insns, ie. that the next
8045 reloc is the __tls_get_addr call associated with
8046 the current reloc. Edit both insns. */
8047 if (input_section->has_tls_get_addr_call
8048 && rel + 1 < relend
8049 && branch_reloc_hash_match (input_bfd, rel + 1,
8050 htab->tls_get_addr))
8051 offset = rel[1].r_offset;
8052 /* We read the low GOT_TLS insn because we need to keep
8053 the destination reg. It may be something other than
8054 the usual r3, and moved to r3 before the call by
8055 intervening code. */
8056 insn1 = bfd_get_32 (input_bfd,
8057 contents + rel->r_offset - d_offset);
8058 if ((tls_mask & tls_gd) != 0)
8059 {
8060 /* IE */
8061 insn1 &= (0x1f << 21) | (0x1f << 16);
8062 insn1 |= 32 << 26; /* lwz */
8063 if (offset != (bfd_vma) -1)
8064 {
8065 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8066 insn2 = 0x7c631214; /* add 3,3,2 */
8067 bfd_put_32 (input_bfd, insn2, contents + offset);
8068 }
8069 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8070 + R_PPC_GOT_TPREL16);
8071 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8072 }
8073 else
8074 {
8075 /* LE */
8076 insn1 &= 0x1f << 21;
8077 insn1 |= 0x3c020000; /* addis r,2,0 */
8078 if (tls_gd == 0)
8079 {
8080 /* Was an LD reloc. */
8081 for (r_symndx = 0;
8082 r_symndx < symtab_hdr->sh_info;
8083 r_symndx++)
8084 if (local_sections[r_symndx] == sec)
8085 break;
8086 if (r_symndx >= symtab_hdr->sh_info)
8087 r_symndx = STN_UNDEF;
8088 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8089 if (r_symndx != STN_UNDEF)
8090 rel->r_addend -= (local_syms[r_symndx].st_value
8091 + sec->output_offset
8092 + sec->output_section->vma);
8093 }
8094 r_type = R_PPC_TPREL16_HA;
8095 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8096 if (offset != (bfd_vma) -1)
8097 {
8098 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8099 rel[1].r_offset = offset + d_offset;
8100 rel[1].r_addend = rel->r_addend;
8101 insn2 = 0x38630000; /* addi 3,3,0 */
8102 bfd_put_32 (input_bfd, insn2, contents + offset);
8103 }
8104 }
8105 bfd_put_32 (input_bfd, insn1,
8106 contents + rel->r_offset - d_offset);
8107 if (tls_gd == 0)
8108 {
8109 /* We changed the symbol on an LD reloc. Start over
8110 in order to get h, sym, sec etc. right. */
8111 goto again;
8112 }
8113 }
8114 break;
8115
8116 case R_PPC_TLSGD:
8117 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8118 {
8119 unsigned int insn2;
8120 bfd_vma offset = rel->r_offset;
8121
8122 if ((tls_mask & TLS_TPRELGD) != 0)
8123 {
8124 /* IE */
8125 r_type = R_PPC_NONE;
8126 insn2 = 0x7c631214; /* add 3,3,2 */
8127 }
8128 else
8129 {
8130 /* LE */
8131 r_type = R_PPC_TPREL16_LO;
8132 rel->r_offset += d_offset;
8133 insn2 = 0x38630000; /* addi 3,3,0 */
8134 }
8135 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8136 bfd_put_32 (input_bfd, insn2, contents + offset);
8137 /* Zap the reloc on the _tls_get_addr call too. */
8138 BFD_ASSERT (offset == rel[1].r_offset);
8139 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8140 }
8141 break;
8142
8143 case R_PPC_TLSLD:
8144 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8145 {
8146 unsigned int insn2;
8147
8148 for (r_symndx = 0;
8149 r_symndx < symtab_hdr->sh_info;
8150 r_symndx++)
8151 if (local_sections[r_symndx] == sec)
8152 break;
8153 if (r_symndx >= symtab_hdr->sh_info)
8154 r_symndx = STN_UNDEF;
8155 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8156 if (r_symndx != STN_UNDEF)
8157 rel->r_addend -= (local_syms[r_symndx].st_value
8158 + sec->output_offset
8159 + sec->output_section->vma);
8160
8161 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8162 rel->r_offset += d_offset;
8163 insn2 = 0x38630000; /* addi 3,3,0 */
8164 bfd_put_32 (input_bfd, insn2,
8165 contents + rel->r_offset - d_offset);
8166 /* Zap the reloc on the _tls_get_addr call too. */
8167 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8168 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8169 goto again;
8170 }
8171 break;
8172 }
8173
8174 /* Handle other relocations that tweak non-addend part of insn. */
8175 branch_bit = 0;
8176 switch (r_type)
8177 {
8178 default:
8179 break;
8180
8181 /* Branch taken prediction relocations. */
8182 case R_PPC_ADDR14_BRTAKEN:
8183 case R_PPC_REL14_BRTAKEN:
8184 branch_bit = BRANCH_PREDICT_BIT;
8185 /* Fall through. */
8186
8187 /* Branch not taken prediction relocations. */
8188 case R_PPC_ADDR14_BRNTAKEN:
8189 case R_PPC_REL14_BRNTAKEN:
8190 {
8191 bfd_vma insn;
8192
8193 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8194 insn &= ~BRANCH_PREDICT_BIT;
8195 insn |= branch_bit;
8196
8197 from = (rel->r_offset
8198 + input_section->output_offset
8199 + input_section->output_section->vma);
8200
8201 /* Invert 'y' bit if not the default. */
8202 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8203 insn ^= BRANCH_PREDICT_BIT;
8204
8205 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8206 break;
8207 }
8208 }
8209
8210 if (ELIMINATE_COPY_RELOCS
8211 && h != NULL
8212 && !h->def_regular
8213 && h->protected_def
8214 && ppc_elf_hash_entry (h)->has_addr16_ha
8215 && ppc_elf_hash_entry (h)->has_addr16_lo
8216 && htab->params->pic_fixup > 0)
8217 {
8218 /* Convert lis;addi or lis;load/store accessing a protected
8219 variable defined in a shared library to PIC. */
8220 unsigned int insn;
8221
8222 if (r_type == R_PPC_ADDR16_HA)
8223 {
8224 insn = bfd_get_32 (input_bfd,
8225 contents + rel->r_offset - d_offset);
8226 if ((insn & (0x3f << 26)) == (15u << 26)
8227 && (insn & (0x1f << 16)) == 0 /* lis */)
8228 {
8229 bfd_byte *p;
8230 bfd_vma off;
8231 bfd_vma got_addr;
8232
8233 p = (contents + input_section->size
8234 - relax_info->workaround_size
8235 - relax_info->picfixup_size
8236 + picfixup_size);
8237 off = (p - contents) - (rel->r_offset - d_offset);
8238 if (off > 0x1fffffc || (off & 3) != 0)
8239 info->callbacks->einfo
8240 (_("%H: fixup branch overflow\n"),
8241 input_bfd, input_section, rel->r_offset);
8242
8243 bfd_put_32 (input_bfd, B | off,
8244 contents + rel->r_offset - d_offset);
8245 got_addr = (htab->elf.sgot->output_section->vma
8246 + htab->elf.sgot->output_offset
8247 + (h->got.offset & ~1));
8248 wrel->r_offset = (p - contents) + d_offset;
8249 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8250 wrel->r_addend = got_addr;
8251 insn &= ~0xffff;
8252 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8253 bfd_put_32 (input_bfd, insn, p);
8254
8255 /* Convert lis to lwz, loading address from GOT. */
8256 insn &= ~0xffff;
8257 insn ^= (32u ^ 15u) << 26;
8258 insn |= (insn & (0x1f << 21)) >> 5;
8259 insn |= got_addr & 0xffff;
8260 bfd_put_32 (input_bfd, insn, p + 4);
8261
8262 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8263 picfixup_size += 12;
8264
8265 /* Use one of the spare relocs, so --emit-relocs
8266 output is reasonable. */
8267 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8268 wrel++, rel++;
8269 rel->r_offset = wrel[-1].r_offset + 4;
8270 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8271 rel->r_addend = wrel[-1].r_addend;
8272
8273 /* Continue on as if we had a got reloc, to output
8274 dynamic reloc. */
8275 r_type = R_PPC_GOT16_LO;
8276 }
8277 else
8278 _bfd_error_handler
8279 /* xgettext:c-format */
8280 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8281 input_bfd, input_section, rel->r_offset,
8282 "R_PPC_ADDR16_HA", insn);
8283 }
8284 else if (r_type == R_PPC_ADDR16_LO)
8285 {
8286 insn = bfd_get_32 (input_bfd,
8287 contents + rel->r_offset - d_offset);
8288 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8289 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8290 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8291 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8292 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8293 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8294 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8295 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8296 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8297 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8298 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8299 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8300 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8301 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8302 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8303 && (insn & 3) != 1)
8304 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8305 && ((insn & 3) == 0 || (insn & 3) == 3)))
8306 {
8307 /* Arrange to apply the reloc addend, if any. */
8308 relocation = 0;
8309 unresolved_reloc = FALSE;
8310 rel->r_info = ELF32_R_INFO (0, r_type);
8311 }
8312 else
8313 _bfd_error_handler
8314 /* xgettext:c-format */
8315 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8316 input_bfd, input_section, rel->r_offset,
8317 "R_PPC_ADDR16_LO", insn);
8318 }
8319 }
8320
8321 ifunc = NULL;
8322 if (!htab->is_vxworks)
8323 {
8324 struct plt_entry *ent;
8325
8326 if (h != NULL)
8327 {
8328 if (h->type == STT_GNU_IFUNC)
8329 ifunc = &h->plt.plist;
8330 }
8331 else if (local_got_offsets != NULL
8332 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8333 {
8334 struct plt_entry **local_plt;
8335
8336 local_plt = (struct plt_entry **) (local_got_offsets
8337 + symtab_hdr->sh_info);
8338 ifunc = local_plt + r_symndx;
8339 }
8340
8341 ent = NULL;
8342 if (ifunc != NULL
8343 && (!bfd_link_pic (info)
8344 || is_branch_reloc (r_type)))
8345 {
8346 addend = 0;
8347 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8348 addend = rel->r_addend;
8349 ent = find_plt_ent (ifunc, got2, addend);
8350 }
8351 if (ent != NULL)
8352 {
8353 if (bfd_link_pic (info)
8354 && ent->sec != got2
8355 && htab->plt_type != PLT_NEW
8356 && (!htab->elf.dynamic_sections_created
8357 || h == NULL
8358 || h->dynindx == -1))
8359 {
8360 /* Uh oh, we are going to create a pic glink stub
8361 for an ifunc (here for h == NULL and later in
8362 finish_dynamic_symbol for h != NULL), and
8363 apparently are using code compiled with
8364 -mbss-plt. The difficulty is that -mbss-plt code
8365 gives no indication via a magic PLTREL24 addend
8366 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8367 is pointing into a .got2 section (and how far
8368 into .got2). */
8369 info->callbacks->einfo
8370 /* xgettext:c-format */
8371 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8372 input_bfd, input_section, rel->r_offset, sym_name);
8373 }
8374 if (h == NULL && (ent->plt.offset & 1) == 0)
8375 {
8376 Elf_Internal_Rela rela;
8377 bfd_byte *loc;
8378
8379 rela.r_offset = (htab->elf.iplt->output_section->vma
8380 + htab->elf.iplt->output_offset
8381 + ent->plt.offset);
8382 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8383 rela.r_addend = relocation;
8384 loc = htab->elf.irelplt->contents;
8385 loc += (htab->elf.irelplt->reloc_count++
8386 * sizeof (Elf32_External_Rela));
8387 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8388 htab->local_ifunc_resolver = 1;
8389
8390 ent->plt.offset |= 1;
8391 }
8392 if (h == NULL && (ent->glink_offset & 1) == 0)
8393 {
8394 unsigned char *p = ((unsigned char *) htab->glink->contents
8395 + ent->glink_offset);
8396 write_glink_stub (ent, htab->elf.iplt, p, info);
8397 ent->glink_offset |= 1;
8398 }
8399
8400 unresolved_reloc = FALSE;
8401 if (htab->plt_type == PLT_NEW
8402 || !htab->elf.dynamic_sections_created
8403 || h == NULL
8404 || h->dynindx == -1)
8405 relocation = (htab->glink->output_section->vma
8406 + htab->glink->output_offset
8407 + (ent->glink_offset & ~1));
8408 else
8409 relocation = (htab->elf.splt->output_section->vma
8410 + htab->elf.splt->output_offset
8411 + ent->plt.offset);
8412 }
8413 }
8414
8415 addend = rel->r_addend;
8416 howto = NULL;
8417 if (r_type < R_PPC_max)
8418 howto = ppc_elf_howto_table[r_type];
8419
8420 switch (r_type)
8421 {
8422 default:
8423 break;
8424
8425 case R_PPC_TPREL16_HA:
8426 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8427 {
8428 bfd_byte *p = contents + (rel->r_offset & ~3);
8429 unsigned int insn = bfd_get_32 (input_bfd, p);
8430 if ((insn & ((0x3f << 26) | 0x1f << 16))
8431 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8432 /* xgettext:c-format */
8433 info->callbacks->minfo
8434 (_("%H: warning: %s unexpected insn %#x.\n"),
8435 input_bfd, input_section, rel->r_offset, howto->name, insn);
8436 else
8437 bfd_put_32 (input_bfd, NOP, p);
8438 }
8439 break;
8440
8441 case R_PPC_TPREL16_LO:
8442 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8443 {
8444 bfd_byte *p = contents + (rel->r_offset & ~3);
8445 unsigned int insn = bfd_get_32 (input_bfd, p);
8446 insn &= ~(0x1f << 16);
8447 insn |= 2 << 16;
8448 bfd_put_32 (input_bfd, insn, p);
8449 }
8450 break;
8451 }
8452
8453 tls_type = 0;
8454 switch (r_type)
8455 {
8456 default:
8457 info->callbacks->einfo
8458 /* xgettext:c-format */
8459 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8460 input_bfd, (int) r_type, sym_name);
8461
8462 bfd_set_error (bfd_error_bad_value);
8463 ret = FALSE;
8464 goto copy_reloc;
8465
8466 case R_PPC_NONE:
8467 case R_PPC_TLS:
8468 case R_PPC_TLSGD:
8469 case R_PPC_TLSLD:
8470 case R_PPC_EMB_MRKREF:
8471 case R_PPC_GNU_VTINHERIT:
8472 case R_PPC_GNU_VTENTRY:
8473 goto copy_reloc;
8474
8475 /* GOT16 relocations. Like an ADDR16 using the symbol's
8476 address in the GOT as relocation value instead of the
8477 symbol's value itself. Also, create a GOT entry for the
8478 symbol and put the symbol value there. */
8479 case R_PPC_GOT_TLSGD16:
8480 case R_PPC_GOT_TLSGD16_LO:
8481 case R_PPC_GOT_TLSGD16_HI:
8482 case R_PPC_GOT_TLSGD16_HA:
8483 tls_type = TLS_TLS | TLS_GD;
8484 goto dogot;
8485
8486 case R_PPC_GOT_TLSLD16:
8487 case R_PPC_GOT_TLSLD16_LO:
8488 case R_PPC_GOT_TLSLD16_HI:
8489 case R_PPC_GOT_TLSLD16_HA:
8490 tls_type = TLS_TLS | TLS_LD;
8491 goto dogot;
8492
8493 case R_PPC_GOT_TPREL16:
8494 case R_PPC_GOT_TPREL16_LO:
8495 case R_PPC_GOT_TPREL16_HI:
8496 case R_PPC_GOT_TPREL16_HA:
8497 tls_type = TLS_TLS | TLS_TPREL;
8498 goto dogot;
8499
8500 case R_PPC_GOT_DTPREL16:
8501 case R_PPC_GOT_DTPREL16_LO:
8502 case R_PPC_GOT_DTPREL16_HI:
8503 case R_PPC_GOT_DTPREL16_HA:
8504 tls_type = TLS_TLS | TLS_DTPREL;
8505 goto dogot;
8506
8507 case R_PPC_GOT16:
8508 case R_PPC_GOT16_LO:
8509 case R_PPC_GOT16_HI:
8510 case R_PPC_GOT16_HA:
8511 tls_mask = 0;
8512 dogot:
8513 {
8514 /* Relocation is to the entry for this symbol in the global
8515 offset table. */
8516 bfd_vma off;
8517 bfd_vma *offp;
8518 unsigned long indx;
8519
8520 if (htab->elf.sgot == NULL)
8521 abort ();
8522
8523 indx = 0;
8524 if (tls_type == (TLS_TLS | TLS_LD)
8525 && (h == NULL
8526 || !h->def_dynamic))
8527 offp = &htab->tlsld_got.offset;
8528 else if (h != NULL)
8529 {
8530 if (!htab->elf.dynamic_sections_created
8531 || h->dynindx == -1
8532 || SYMBOL_REFERENCES_LOCAL (info, h)
8533 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8534 /* This is actually a static link, or it is a
8535 -Bsymbolic link and the symbol is defined
8536 locally, or the symbol was forced to be local
8537 because of a version file. */
8538 ;
8539 else
8540 {
8541 indx = h->dynindx;
8542 unresolved_reloc = FALSE;
8543 }
8544 offp = &h->got.offset;
8545 }
8546 else
8547 {
8548 if (local_got_offsets == NULL)
8549 abort ();
8550 offp = &local_got_offsets[r_symndx];
8551 }
8552
8553 /* The offset must always be a multiple of 4. We use the
8554 least significant bit to record whether we have already
8555 processed this entry. */
8556 off = *offp;
8557 if ((off & 1) != 0)
8558 off &= ~1;
8559 else
8560 {
8561 unsigned int tls_m = (tls_mask
8562 & (TLS_LD | TLS_GD | TLS_DTPREL
8563 | TLS_TPREL | TLS_TPRELGD));
8564
8565 if (offp == &htab->tlsld_got.offset)
8566 tls_m = TLS_LD;
8567 else if (h == NULL
8568 || !h->def_dynamic)
8569 tls_m &= ~TLS_LD;
8570
8571 /* We might have multiple got entries for this sym.
8572 Initialize them all. */
8573 do
8574 {
8575 int tls_ty = 0;
8576
8577 if ((tls_m & TLS_LD) != 0)
8578 {
8579 tls_ty = TLS_TLS | TLS_LD;
8580 tls_m &= ~TLS_LD;
8581 }
8582 else if ((tls_m & TLS_GD) != 0)
8583 {
8584 tls_ty = TLS_TLS | TLS_GD;
8585 tls_m &= ~TLS_GD;
8586 }
8587 else if ((tls_m & TLS_DTPREL) != 0)
8588 {
8589 tls_ty = TLS_TLS | TLS_DTPREL;
8590 tls_m &= ~TLS_DTPREL;
8591 }
8592 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8593 {
8594 tls_ty = TLS_TLS | TLS_TPREL;
8595 tls_m = 0;
8596 }
8597
8598 /* Generate relocs for the dynamic linker. */
8599 if (indx != 0
8600 || (bfd_link_pic (info)
8601 && (h == NULL
8602 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8603 || offp == &htab->tlsld_got.offset)))
8604 {
8605 asection *rsec = htab->elf.srelgot;
8606 bfd_byte * loc;
8607
8608 if (ifunc != NULL)
8609 {
8610 rsec = htab->elf.irelplt;
8611 if (indx == 0)
8612 htab->local_ifunc_resolver = 1;
8613 else if (is_static_defined (h))
8614 htab->maybe_local_ifunc_resolver = 1;
8615 }
8616 outrel.r_offset = (htab->elf.sgot->output_section->vma
8617 + htab->elf.sgot->output_offset
8618 + off);
8619 outrel.r_addend = 0;
8620 if (tls_ty & (TLS_LD | TLS_GD))
8621 {
8622 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8623 if (tls_ty == (TLS_TLS | TLS_GD))
8624 {
8625 loc = rsec->contents;
8626 loc += (rsec->reloc_count++
8627 * sizeof (Elf32_External_Rela));
8628 bfd_elf32_swap_reloca_out (output_bfd,
8629 &outrel, loc);
8630 outrel.r_offset += 4;
8631 outrel.r_info
8632 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8633 }
8634 }
8635 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8636 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8637 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8638 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8639 else if (indx != 0)
8640 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8641 else if (ifunc != NULL)
8642 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8643 else
8644 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8645 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8646 {
8647 outrel.r_addend += relocation;
8648 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8649 {
8650 if (htab->elf.tls_sec == NULL)
8651 outrel.r_addend = 0;
8652 else
8653 outrel.r_addend -= htab->elf.tls_sec->vma;
8654 }
8655 }
8656 loc = rsec->contents;
8657 loc += (rsec->reloc_count++
8658 * sizeof (Elf32_External_Rela));
8659 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8660 }
8661
8662 /* Init the .got section contents if we're not
8663 emitting a reloc. */
8664 else
8665 {
8666 bfd_vma value = relocation;
8667
8668 if (tls_ty != 0)
8669 {
8670 if (htab->elf.tls_sec == NULL)
8671 value = 0;
8672 else
8673 {
8674 if (tls_ty & TLS_LD)
8675 value = 0;
8676 else
8677 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8678 if (tls_ty & TLS_TPREL)
8679 value += DTP_OFFSET - TP_OFFSET;
8680 }
8681
8682 if (tls_ty & (TLS_LD | TLS_GD))
8683 {
8684 bfd_put_32 (input_bfd, value,
8685 htab->elf.sgot->contents + off + 4);
8686 value = 1;
8687 }
8688 }
8689 bfd_put_32 (input_bfd, value,
8690 htab->elf.sgot->contents + off);
8691 }
8692
8693 off += 4;
8694 if (tls_ty & (TLS_LD | TLS_GD))
8695 off += 4;
8696 }
8697 while (tls_m != 0);
8698
8699 off = *offp;
8700 *offp = off | 1;
8701 }
8702
8703 if (off >= (bfd_vma) -2)
8704 abort ();
8705
8706 if ((tls_type & TLS_TLS) != 0)
8707 {
8708 if (tls_type != (TLS_TLS | TLS_LD))
8709 {
8710 if ((tls_mask & TLS_LD) != 0
8711 && !(h == NULL
8712 || !h->def_dynamic))
8713 off += 8;
8714 if (tls_type != (TLS_TLS | TLS_GD))
8715 {
8716 if ((tls_mask & TLS_GD) != 0)
8717 off += 8;
8718 if (tls_type != (TLS_TLS | TLS_DTPREL))
8719 {
8720 if ((tls_mask & TLS_DTPREL) != 0)
8721 off += 4;
8722 }
8723 }
8724 }
8725 }
8726
8727 /* If here for a picfixup, we're done. */
8728 if (r_type != ELF32_R_TYPE (rel->r_info))
8729 goto copy_reloc;
8730
8731 relocation = (htab->elf.sgot->output_section->vma
8732 + htab->elf.sgot->output_offset
8733 + off
8734 - SYM_VAL (htab->elf.hgot));
8735
8736 /* Addends on got relocations don't make much sense.
8737 x+off@got is actually x@got+off, and since the got is
8738 generated by a hash table traversal, the value in the
8739 got at entry m+n bears little relation to the entry m. */
8740 if (addend != 0)
8741 info->callbacks->einfo
8742 /* xgettext:c-format */
8743 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8744 input_bfd, input_section, rel->r_offset,
8745 howto->name,
8746 sym_name);
8747 }
8748 break;
8749
8750 /* Relocations that need no special processing. */
8751 case R_PPC_LOCAL24PC:
8752 /* It makes no sense to point a local relocation
8753 at a symbol not in this object. */
8754 if (unresolved_reloc)
8755 {
8756 (*info->callbacks->undefined_symbol) (info,
8757 h->root.root.string,
8758 input_bfd,
8759 input_section,
8760 rel->r_offset,
8761 TRUE);
8762 goto copy_reloc;
8763 }
8764 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8765 {
8766 /* @local on an ifunc does not really make sense since
8767 the ifunc resolver can take you anywhere. More
8768 seriously, calls to ifuncs must go through a plt call
8769 stub, and for pic the plt call stubs uses r30 to
8770 access the PLT. The problem is that a call that is
8771 local won't have the +32k reloc addend trick marking
8772 -fPIC code, so the linker won't know whether r30 is
8773 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8774 /* xgettext:c-format */
8775 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8776 input_bfd, input_section, rel->r_offset,
8777 h->root.root.string);
8778 }
8779 break;
8780
8781 case R_PPC_DTPREL16:
8782 case R_PPC_DTPREL16_LO:
8783 case R_PPC_DTPREL16_HI:
8784 case R_PPC_DTPREL16_HA:
8785 if (htab->elf.tls_sec != NULL)
8786 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8787 break;
8788
8789 /* Relocations that may need to be propagated if this is a shared
8790 object. */
8791 case R_PPC_TPREL16:
8792 case R_PPC_TPREL16_LO:
8793 case R_PPC_TPREL16_HI:
8794 case R_PPC_TPREL16_HA:
8795 if (h != NULL
8796 && h->root.type == bfd_link_hash_undefweak
8797 && h->dynindx == -1)
8798 {
8799 /* Make this relocation against an undefined weak symbol
8800 resolve to zero. This is really just a tweak, since
8801 code using weak externs ought to check that they are
8802 defined before using them. */
8803 bfd_byte *p = contents + rel->r_offset - d_offset;
8804 unsigned int insn = bfd_get_32 (input_bfd, p);
8805 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8806 if (insn != 0)
8807 bfd_put_32 (input_bfd, insn, p);
8808 break;
8809 }
8810 if (htab->elf.tls_sec != NULL)
8811 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8812 /* The TPREL16 relocs shouldn't really be used in shared
8813 libs or with non-local symbols as that will result in
8814 DT_TEXTREL being set, but support them anyway. */
8815 goto dodyn;
8816
8817 case R_PPC_TPREL32:
8818 if (htab->elf.tls_sec != NULL)
8819 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8820 goto dodyn;
8821
8822 case R_PPC_DTPREL32:
8823 if (htab->elf.tls_sec != NULL)
8824 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8825 goto dodyn;
8826
8827 case R_PPC_DTPMOD32:
8828 relocation = 1;
8829 addend = 0;
8830 goto dodyn;
8831
8832 case R_PPC_REL16:
8833 case R_PPC_REL16_LO:
8834 case R_PPC_REL16_HI:
8835 case R_PPC_REL16_HA:
8836 case R_PPC_REL16DX_HA:
8837 break;
8838
8839 case R_PPC_REL32:
8840 if (h == NULL || h == htab->elf.hgot)
8841 break;
8842 /* fall through */
8843
8844 case R_PPC_ADDR32:
8845 case R_PPC_ADDR16:
8846 case R_PPC_ADDR16_LO:
8847 case R_PPC_ADDR16_HI:
8848 case R_PPC_ADDR16_HA:
8849 case R_PPC_UADDR32:
8850 case R_PPC_UADDR16:
8851 goto dodyn;
8852
8853 case R_PPC_VLE_REL8:
8854 case R_PPC_VLE_REL15:
8855 case R_PPC_VLE_REL24:
8856 case R_PPC_REL24:
8857 case R_PPC_REL14:
8858 case R_PPC_REL14_BRTAKEN:
8859 case R_PPC_REL14_BRNTAKEN:
8860 /* If these relocations are not to a named symbol, they can be
8861 handled right here, no need to bother the dynamic linker. */
8862 if (SYMBOL_CALLS_LOCAL (info, h)
8863 || h == htab->elf.hgot)
8864 break;
8865 /* fall through */
8866
8867 case R_PPC_ADDR24:
8868 case R_PPC_ADDR14:
8869 case R_PPC_ADDR14_BRTAKEN:
8870 case R_PPC_ADDR14_BRNTAKEN:
8871 if (h != NULL && !bfd_link_pic (info))
8872 break;
8873 /* fall through */
8874
8875 dodyn:
8876 if ((input_section->flags & SEC_ALLOC) == 0
8877 || is_vxworks_tls)
8878 break;
8879
8880 if ((bfd_link_pic (info)
8881 && !(h != NULL
8882 && ((h->root.type == bfd_link_hash_undefined
8883 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8884 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
8885 && (must_be_dyn_reloc (info, r_type)
8886 || !SYMBOL_CALLS_LOCAL (info, h)))
8887 || (ELIMINATE_COPY_RELOCS
8888 && !bfd_link_pic (info)
8889 && h != NULL
8890 && h->dynindx != -1
8891 && !h->non_got_ref
8892 && !h->def_regular
8893 && !(h->protected_def
8894 && ppc_elf_hash_entry (h)->has_addr16_ha
8895 && ppc_elf_hash_entry (h)->has_addr16_lo
8896 && htab->params->pic_fixup > 0)))
8897 {
8898 int skip;
8899 bfd_byte *loc;
8900 asection *sreloc;
8901 long indx = 0;
8902
8903 #ifdef DEBUG
8904 fprintf (stderr, "ppc_elf_relocate_section needs to "
8905 "create relocation for %s\n",
8906 (h && h->root.root.string
8907 ? h->root.root.string : "<unknown>"));
8908 #endif
8909
8910 /* When generating a shared object, these relocations
8911 are copied into the output file to be resolved at run
8912 time. */
8913 skip = 0;
8914 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8915 input_section,
8916 rel->r_offset);
8917 if (outrel.r_offset == (bfd_vma) -1
8918 || outrel.r_offset == (bfd_vma) -2)
8919 skip = (int) outrel.r_offset;
8920 outrel.r_offset += (input_section->output_section->vma
8921 + input_section->output_offset);
8922
8923 if (skip)
8924 memset (&outrel, 0, sizeof outrel);
8925 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8926 {
8927 indx = h->dynindx;
8928 BFD_ASSERT (indx != -1);
8929 unresolved_reloc = FALSE;
8930 outrel.r_info = ELF32_R_INFO (indx, r_type);
8931 outrel.r_addend = rel->r_addend;
8932 }
8933 else
8934 {
8935 outrel.r_addend = relocation + rel->r_addend;
8936
8937 if (r_type != R_PPC_ADDR32)
8938 {
8939 if (ifunc != NULL)
8940 {
8941 /* If we get here when building a static
8942 executable, then the libc startup function
8943 responsible for applying indirect function
8944 relocations is going to complain about
8945 the reloc type.
8946 If we get here when building a dynamic
8947 executable, it will be because we have
8948 a text relocation. The dynamic loader
8949 will set the text segment writable and
8950 non-executable to apply text relocations.
8951 So we'll segfault when trying to run the
8952 indirection function to resolve the reloc. */
8953 info->callbacks->einfo
8954 /* xgettext:c-format */
8955 (_("%H: relocation %s for indirect "
8956 "function %s unsupported\n"),
8957 input_bfd, input_section, rel->r_offset,
8958 howto->name,
8959 sym_name);
8960 ret = FALSE;
8961 }
8962 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8963 ;
8964 else if (sec == NULL || sec->owner == NULL)
8965 {
8966 bfd_set_error (bfd_error_bad_value);
8967 ret = FALSE;
8968 }
8969 else
8970 {
8971 asection *osec;
8972
8973 /* We are turning this relocation into one
8974 against a section symbol. It would be
8975 proper to subtract the symbol's value,
8976 osec->vma, from the emitted reloc addend,
8977 but ld.so expects buggy relocs.
8978 FIXME: Why not always use a zero index? */
8979 osec = sec->output_section;
8980 indx = elf_section_data (osec)->dynindx;
8981 if (indx == 0)
8982 {
8983 osec = htab->elf.text_index_section;
8984 indx = elf_section_data (osec)->dynindx;
8985 }
8986 BFD_ASSERT (indx != 0);
8987 #ifdef DEBUG
8988 if (indx == 0)
8989 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8990 indx, osec->name, osec->flags,
8991 h->root.root.string);
8992 #endif
8993 }
8994
8995 outrel.r_info = ELF32_R_INFO (indx, r_type);
8996 }
8997 else if (ifunc != NULL)
8998 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8999 else
9000 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9001 }
9002
9003 sreloc = elf_section_data (input_section)->sreloc;
9004 if (ifunc)
9005 {
9006 sreloc = htab->elf.irelplt;
9007 if (indx == 0)
9008 htab->local_ifunc_resolver = 1;
9009 else if (is_static_defined (h))
9010 htab->maybe_local_ifunc_resolver = 1;
9011 }
9012 if (sreloc == NULL)
9013 return FALSE;
9014
9015 loc = sreloc->contents;
9016 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9017 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9018
9019 if (skip == -1)
9020 goto copy_reloc;
9021
9022 /* This reloc will be computed at runtime. Clear the memory
9023 so that it contains a predictable value for prelink. */
9024 if (!skip)
9025 {
9026 relocation = howto->pc_relative ? outrel.r_offset : 0;
9027 addend = 0;
9028 break;
9029 }
9030 }
9031 break;
9032
9033 case R_PPC_RELAX_PLT:
9034 case R_PPC_RELAX_PLTREL24:
9035 if (h != NULL)
9036 {
9037 struct plt_entry *ent;
9038 bfd_vma got2_addend = 0;
9039
9040 if (r_type == R_PPC_RELAX_PLTREL24)
9041 {
9042 if (bfd_link_pic (info))
9043 got2_addend = addend;
9044 addend = 0;
9045 }
9046 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9047 if (htab->plt_type == PLT_NEW)
9048 relocation = (htab->glink->output_section->vma
9049 + htab->glink->output_offset
9050 + ent->glink_offset);
9051 else
9052 relocation = (htab->elf.splt->output_section->vma
9053 + htab->elf.splt->output_offset
9054 + ent->plt.offset);
9055 }
9056 /* Fall through. */
9057
9058 case R_PPC_RELAX:
9059 {
9060 const int *stub;
9061 size_t size;
9062 size_t insn_offset = rel->r_offset;
9063 unsigned int insn;
9064
9065 if (bfd_link_pic (info))
9066 {
9067 relocation -= (input_section->output_section->vma
9068 + input_section->output_offset
9069 + rel->r_offset - 4);
9070 stub = shared_stub_entry;
9071 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9072 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9073 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9074 stub += 3;
9075 size = ARRAY_SIZE (shared_stub_entry) - 3;
9076 }
9077 else
9078 {
9079 stub = stub_entry;
9080 size = ARRAY_SIZE (stub_entry);
9081 }
9082
9083 relocation += addend;
9084 if (bfd_link_relocatable (info))
9085 relocation = 0;
9086
9087 /* First insn is HA, second is LO. */
9088 insn = *stub++;
9089 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9090 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9091 insn_offset += 4;
9092
9093 insn = *stub++;
9094 insn |= relocation & 0xffff;
9095 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9096 insn_offset += 4;
9097 size -= 2;
9098
9099 while (size != 0)
9100 {
9101 insn = *stub++;
9102 --size;
9103 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9104 insn_offset += 4;
9105 }
9106
9107 /* Rewrite the reloc and convert one of the trailing nop
9108 relocs to describe this relocation. */
9109 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9110 /* The relocs are at the bottom 2 bytes */
9111 wrel->r_offset = rel->r_offset + d_offset;
9112 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9113 wrel->r_addend = rel->r_addend;
9114 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9115 wrel++, rel++;
9116 wrel->r_offset += 4;
9117 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9118 }
9119 continue;
9120
9121 /* Indirect .sdata relocation. */
9122 case R_PPC_EMB_SDAI16:
9123 BFD_ASSERT (htab->sdata[0].section != NULL);
9124 if (!is_static_defined (htab->sdata[0].sym))
9125 {
9126 unresolved_reloc = TRUE;
9127 break;
9128 }
9129 relocation
9130 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9131 h, relocation, rel);
9132 addend = 0;
9133 break;
9134
9135 /* Indirect .sdata2 relocation. */
9136 case R_PPC_EMB_SDA2I16:
9137 BFD_ASSERT (htab->sdata[1].section != NULL);
9138 if (!is_static_defined (htab->sdata[1].sym))
9139 {
9140 unresolved_reloc = TRUE;
9141 break;
9142 }
9143 relocation
9144 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9145 h, relocation, rel);
9146 addend = 0;
9147 break;
9148
9149 /* Handle the TOC16 reloc. We want to use the offset within the .got
9150 section, not the actual VMA. This is appropriate when generating
9151 an embedded ELF object, for which the .got section acts like the
9152 AIX .toc section. */
9153 case R_PPC_TOC16: /* phony GOT16 relocations */
9154 if (sec == NULL || sec->output_section == NULL)
9155 {
9156 unresolved_reloc = TRUE;
9157 break;
9158 }
9159 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9160 ".got") == 0
9161 || strcmp (bfd_get_section_name (sec->owner, sec),
9162 ".cgot") == 0);
9163
9164 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9165 break;
9166
9167 case R_PPC_PLTREL24:
9168 if (h != NULL && ifunc == NULL)
9169 {
9170 struct plt_entry *ent;
9171
9172 ent = find_plt_ent (&h->plt.plist, got2,
9173 bfd_link_pic (info) ? addend : 0);
9174 if (ent == NULL
9175 || htab->elf.splt == NULL)
9176 {
9177 /* We didn't make a PLT entry for this symbol. This
9178 happens when statically linking PIC code, or when
9179 using -Bsymbolic. */
9180 }
9181 else
9182 {
9183 /* Relocation is to the entry for this symbol in the
9184 procedure linkage table. */
9185 unresolved_reloc = FALSE;
9186 if (htab->plt_type == PLT_NEW)
9187 relocation = (htab->glink->output_section->vma
9188 + htab->glink->output_offset
9189 + ent->glink_offset);
9190 else
9191 relocation = (htab->elf.splt->output_section->vma
9192 + htab->elf.splt->output_offset
9193 + ent->plt.offset);
9194 }
9195 }
9196
9197 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9198 addend specifies the GOT pointer offset within .got2.
9199 Don't apply it to the relocation field. */
9200 addend = 0;
9201 break;
9202
9203 /* Relocate against _SDA_BASE_. */
9204 case R_PPC_SDAREL16:
9205 {
9206 const char *name;
9207 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9208
9209 if (sec == NULL
9210 || sec->output_section == NULL
9211 || !is_static_defined (sda))
9212 {
9213 unresolved_reloc = TRUE;
9214 break;
9215 }
9216 addend -= SYM_VAL (sda);
9217
9218 name = bfd_get_section_name (output_bfd, sec->output_section);
9219 if (!(strcmp (name, ".sdata") == 0
9220 || strcmp (name, ".sbss") == 0))
9221 {
9222 info->callbacks->einfo
9223 /* xgettext:c-format */
9224 (_("%P: %B: the target (%s) of a %s relocation is "
9225 "in the wrong output section (%s)\n"),
9226 input_bfd,
9227 sym_name,
9228 howto->name,
9229 name);
9230 }
9231 }
9232 break;
9233
9234 /* Relocate against _SDA2_BASE_. */
9235 case R_PPC_EMB_SDA2REL:
9236 {
9237 const char *name;
9238 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9239
9240 if (sec == NULL
9241 || sec->output_section == NULL
9242 || !is_static_defined (sda))
9243 {
9244 unresolved_reloc = TRUE;
9245 break;
9246 }
9247 addend -= SYM_VAL (sda);
9248
9249 name = bfd_get_section_name (output_bfd, sec->output_section);
9250 if (!(strcmp (name, ".sdata2") == 0
9251 || strcmp (name, ".sbss2") == 0))
9252 {
9253 info->callbacks->einfo
9254 /* xgettext:c-format */
9255 (_("%P: %B: the target (%s) of a %s relocation is "
9256 "in the wrong output section (%s)\n"),
9257 input_bfd,
9258 sym_name,
9259 howto->name,
9260 name);
9261 }
9262 }
9263 break;
9264
9265 case R_PPC_VLE_LO16A:
9266 relocation = relocation + addend;
9267 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9268 contents + rel->r_offset, relocation,
9269 split16a_type, htab->params->vle_reloc_fixup);
9270 goto copy_reloc;
9271
9272 case R_PPC_VLE_LO16D:
9273 relocation = relocation + addend;
9274 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9275 contents + rel->r_offset, relocation,
9276 split16d_type, htab->params->vle_reloc_fixup);
9277 goto copy_reloc;
9278
9279 case R_PPC_VLE_HI16A:
9280 relocation = (relocation + addend) >> 16;
9281 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9282 contents + rel->r_offset, relocation,
9283 split16a_type, htab->params->vle_reloc_fixup);
9284 goto copy_reloc;
9285
9286 case R_PPC_VLE_HI16D:
9287 relocation = (relocation + addend) >> 16;
9288 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9289 contents + rel->r_offset, relocation,
9290 split16d_type, htab->params->vle_reloc_fixup);
9291 goto copy_reloc;
9292
9293 case R_PPC_VLE_HA16A:
9294 relocation = (relocation + addend + 0x8000) >> 16;
9295 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9296 contents + rel->r_offset, relocation,
9297 split16a_type, htab->params->vle_reloc_fixup);
9298 goto copy_reloc;
9299
9300 case R_PPC_VLE_HA16D:
9301 relocation = (relocation + addend + 0x8000) >> 16;
9302 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9303 contents + rel->r_offset, relocation,
9304 split16d_type, htab->params->vle_reloc_fixup);
9305 goto copy_reloc;
9306
9307 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9308 case R_PPC_EMB_SDA21:
9309 case R_PPC_VLE_SDA21:
9310 case R_PPC_EMB_RELSDA:
9311 case R_PPC_VLE_SDA21_LO:
9312 {
9313 const char *name;
9314 int reg;
9315 unsigned int insn;
9316 struct elf_link_hash_entry *sda = NULL;
9317
9318 if (sec == NULL || sec->output_section == NULL)
9319 {
9320 unresolved_reloc = TRUE;
9321 break;
9322 }
9323
9324 name = bfd_get_section_name (output_bfd, sec->output_section);
9325 if (strcmp (name, ".sdata") == 0
9326 || strcmp (name, ".sbss") == 0)
9327 {
9328 reg = 13;
9329 sda = htab->sdata[0].sym;
9330 }
9331 else if (strcmp (name, ".sdata2") == 0
9332 || strcmp (name, ".sbss2") == 0)
9333 {
9334 reg = 2;
9335 sda = htab->sdata[1].sym;
9336 }
9337 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9338 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9339 {
9340 reg = 0;
9341 }
9342 else
9343 {
9344 info->callbacks->einfo
9345 /* xgettext:c-format */
9346 (_("%P: %B: the target (%s) of a %s relocation is "
9347 "in the wrong output section (%s)\n"),
9348 input_bfd,
9349 sym_name,
9350 howto->name,
9351 name);
9352
9353 bfd_set_error (bfd_error_bad_value);
9354 ret = FALSE;
9355 goto copy_reloc;
9356 }
9357
9358 if (sda != NULL)
9359 {
9360 if (!is_static_defined (sda))
9361 {
9362 unresolved_reloc = TRUE;
9363 break;
9364 }
9365 addend -= SYM_VAL (sda);
9366 }
9367
9368 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9369 if (reg == 0
9370 && (r_type == R_PPC_VLE_SDA21
9371 || r_type == R_PPC_VLE_SDA21_LO))
9372 {
9373 relocation = relocation + addend;
9374 addend = 0;
9375
9376 /* Force e_li insn, keeping RT from original insn. */
9377 insn &= 0x1f << 21;
9378 insn |= 28u << 26;
9379
9380 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9381 /* Top 4 bits of value to 17..20. */
9382 insn |= (relocation & 0xf0000) >> 5;
9383 /* Next 5 bits of the value to 11..15. */
9384 insn |= (relocation & 0xf800) << 5;
9385 /* And the final 11 bits of the value to bits 21 to 31. */
9386 insn |= relocation & 0x7ff;
9387
9388 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9389
9390 if (r_type == R_PPC_VLE_SDA21
9391 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9392 goto overflow;
9393 goto copy_reloc;
9394 }
9395 else if (r_type == R_PPC_EMB_SDA21
9396 || r_type == R_PPC_VLE_SDA21
9397 || r_type == R_PPC_VLE_SDA21_LO)
9398 {
9399 /* Fill in register field. */
9400 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9401 }
9402 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9403 }
9404 break;
9405
9406 case R_PPC_VLE_SDAREL_LO16A:
9407 case R_PPC_VLE_SDAREL_LO16D:
9408 case R_PPC_VLE_SDAREL_HI16A:
9409 case R_PPC_VLE_SDAREL_HI16D:
9410 case R_PPC_VLE_SDAREL_HA16A:
9411 case R_PPC_VLE_SDAREL_HA16D:
9412 {
9413 bfd_vma value;
9414 const char *name;
9415 struct elf_link_hash_entry *sda = NULL;
9416
9417 if (sec == NULL || sec->output_section == NULL)
9418 {
9419 unresolved_reloc = TRUE;
9420 break;
9421 }
9422
9423 name = bfd_get_section_name (output_bfd, sec->output_section);
9424 if (strcmp (name, ".sdata") == 0
9425 || strcmp (name, ".sbss") == 0)
9426 sda = htab->sdata[0].sym;
9427 else if (strcmp (name, ".sdata2") == 0
9428 || strcmp (name, ".sbss2") == 0)
9429 sda = htab->sdata[1].sym;
9430 else
9431 {
9432 _bfd_error_handler
9433 /* xgettext:c-format */
9434 (_("%B: the target (%s) of a %s relocation is "
9435 "in the wrong output section (%s)"),
9436 input_bfd,
9437 sym_name,
9438 howto->name,
9439 name);
9440
9441 bfd_set_error (bfd_error_bad_value);
9442 ret = FALSE;
9443 goto copy_reloc;
9444 }
9445
9446 if (sda == NULL || !is_static_defined (sda))
9447 {
9448 unresolved_reloc = TRUE;
9449 break;
9450 }
9451 value = relocation + addend - SYM_VAL (sda);
9452
9453 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9454 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9455 contents + rel->r_offset, value,
9456 split16a_type,
9457 htab->params->vle_reloc_fixup);
9458 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9459 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9460 contents + rel->r_offset, value,
9461 split16d_type,
9462 htab->params->vle_reloc_fixup);
9463 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9464 {
9465 value = value >> 16;
9466 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9467 contents + rel->r_offset, value,
9468 split16a_type,
9469 htab->params->vle_reloc_fixup);
9470 }
9471 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9472 {
9473 value = value >> 16;
9474 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9475 contents + rel->r_offset, value,
9476 split16d_type,
9477 htab->params->vle_reloc_fixup);
9478 }
9479 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9480 {
9481 value = (value + 0x8000) >> 16;
9482 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9483 contents + rel->r_offset, value,
9484 split16a_type,
9485 htab->params->vle_reloc_fixup);
9486 }
9487 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9488 {
9489 value = (value + 0x8000) >> 16;
9490 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9491 contents + rel->r_offset, value,
9492 split16d_type,
9493 htab->params->vle_reloc_fixup);
9494 }
9495 }
9496 goto copy_reloc;
9497
9498 case R_PPC_VLE_ADDR20:
9499 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9500 continue;
9501
9502 /* Relocate against the beginning of the section. */
9503 case R_PPC_SECTOFF:
9504 case R_PPC_SECTOFF_LO:
9505 case R_PPC_SECTOFF_HI:
9506 case R_PPC_SECTOFF_HA:
9507 if (sec == NULL || sec->output_section == NULL)
9508 {
9509 unresolved_reloc = TRUE;
9510 break;
9511 }
9512 addend -= sec->output_section->vma;
9513 break;
9514
9515 /* Negative relocations. */
9516 case R_PPC_EMB_NADDR32:
9517 case R_PPC_EMB_NADDR16:
9518 case R_PPC_EMB_NADDR16_LO:
9519 case R_PPC_EMB_NADDR16_HI:
9520 case R_PPC_EMB_NADDR16_HA:
9521 addend -= 2 * relocation;
9522 break;
9523
9524 case R_PPC_COPY:
9525 case R_PPC_GLOB_DAT:
9526 case R_PPC_JMP_SLOT:
9527 case R_PPC_RELATIVE:
9528 case R_PPC_IRELATIVE:
9529 case R_PPC_PLT32:
9530 case R_PPC_PLTREL32:
9531 case R_PPC_PLT16_LO:
9532 case R_PPC_PLT16_HI:
9533 case R_PPC_PLT16_HA:
9534 case R_PPC_ADDR30:
9535 case R_PPC_EMB_RELSEC16:
9536 case R_PPC_EMB_RELST_LO:
9537 case R_PPC_EMB_RELST_HI:
9538 case R_PPC_EMB_RELST_HA:
9539 case R_PPC_EMB_BIT_FLD:
9540 info->callbacks->einfo
9541 /* xgettext:c-format */
9542 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9543 input_bfd,
9544 howto->name,
9545 sym_name);
9546
9547 bfd_set_error (bfd_error_invalid_operation);
9548 ret = FALSE;
9549 goto copy_reloc;
9550 }
9551
9552 /* Do any further special processing. */
9553 switch (r_type)
9554 {
9555 default:
9556 break;
9557
9558 case R_PPC_ADDR16_HA:
9559 case R_PPC_REL16_HA:
9560 case R_PPC_REL16DX_HA:
9561 case R_PPC_SECTOFF_HA:
9562 case R_PPC_TPREL16_HA:
9563 case R_PPC_DTPREL16_HA:
9564 case R_PPC_EMB_NADDR16_HA:
9565 case R_PPC_EMB_RELST_HA:
9566 /* It's just possible that this symbol is a weak symbol
9567 that's not actually defined anywhere. In that case,
9568 'sec' would be NULL, and we should leave the symbol
9569 alone (it will be set to zero elsewhere in the link). */
9570 if (sec == NULL)
9571 break;
9572 /* Fall through. */
9573
9574 case R_PPC_PLT16_HA:
9575 case R_PPC_GOT16_HA:
9576 case R_PPC_GOT_TLSGD16_HA:
9577 case R_PPC_GOT_TLSLD16_HA:
9578 case R_PPC_GOT_TPREL16_HA:
9579 case R_PPC_GOT_DTPREL16_HA:
9580 /* Add 0x10000 if sign bit in 0:15 is set.
9581 Bits 0:15 are not used. */
9582 addend += 0x8000;
9583 break;
9584
9585 case R_PPC_ADDR16:
9586 case R_PPC_ADDR16_LO:
9587 case R_PPC_GOT16:
9588 case R_PPC_GOT16_LO:
9589 case R_PPC_SDAREL16:
9590 case R_PPC_SECTOFF:
9591 case R_PPC_SECTOFF_LO:
9592 case R_PPC_DTPREL16:
9593 case R_PPC_DTPREL16_LO:
9594 case R_PPC_TPREL16:
9595 case R_PPC_TPREL16_LO:
9596 case R_PPC_GOT_TLSGD16:
9597 case R_PPC_GOT_TLSGD16_LO:
9598 case R_PPC_GOT_TLSLD16:
9599 case R_PPC_GOT_TLSLD16_LO:
9600 case R_PPC_GOT_DTPREL16:
9601 case R_PPC_GOT_DTPREL16_LO:
9602 case R_PPC_GOT_TPREL16:
9603 case R_PPC_GOT_TPREL16_LO:
9604 {
9605 /* The 32-bit ABI lacks proper relocations to deal with
9606 certain 64-bit instructions. Prevent damage to bits
9607 that make up part of the insn opcode. */
9608 unsigned int insn, mask, lobit;
9609
9610 insn = bfd_get_32 (input_bfd,
9611 contents + rel->r_offset - d_offset);
9612 mask = 0;
9613 if (is_insn_ds_form (insn))
9614 mask = 3;
9615 else if (is_insn_dq_form (insn))
9616 mask = 15;
9617 else
9618 break;
9619 relocation += addend;
9620 addend = insn & mask;
9621 lobit = mask & relocation;
9622 if (lobit != 0)
9623 {
9624 relocation ^= lobit;
9625 info->callbacks->einfo
9626 /* xgettext:c-format */
9627 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9628 input_bfd, input_section, rel->r_offset,
9629 howto->name, sym_name, mask + 1);
9630 bfd_set_error (bfd_error_bad_value);
9631 ret = FALSE;
9632 }
9633 }
9634 break;
9635 }
9636
9637 #ifdef DEBUG
9638 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9639 "offset = %ld, addend = %ld\n",
9640 howto->name,
9641 (int) r_type,
9642 sym_name,
9643 r_symndx,
9644 (long) rel->r_offset,
9645 (long) addend);
9646 #endif
9647
9648 if (unresolved_reloc
9649 && !((input_section->flags & SEC_DEBUGGING) != 0
9650 && h->def_dynamic)
9651 && _bfd_elf_section_offset (output_bfd, info, input_section,
9652 rel->r_offset) != (bfd_vma) -1)
9653 {
9654 info->callbacks->einfo
9655 /* xgettext:c-format */
9656 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9657 input_bfd, input_section, rel->r_offset,
9658 howto->name,
9659 sym_name);
9660 ret = FALSE;
9661 }
9662
9663 /* 16-bit fields in insns mostly have signed values, but a
9664 few insns have 16-bit unsigned values. Really, we should
9665 have different reloc types. */
9666 if (howto->complain_on_overflow != complain_overflow_dont
9667 && howto->dst_mask == 0xffff
9668 && (input_section->flags & SEC_CODE) != 0)
9669 {
9670 enum complain_overflow complain = complain_overflow_signed;
9671
9672 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9673 {
9674 unsigned int insn;
9675
9676 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9677 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9678 complain = complain_overflow_bitfield;
9679 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9680 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9681 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9682 complain = complain_overflow_unsigned;
9683 }
9684 if (howto->complain_on_overflow != complain)
9685 {
9686 alt_howto = *howto;
9687 alt_howto.complain_on_overflow = complain;
9688 howto = &alt_howto;
9689 }
9690 }
9691
9692 if (r_type == R_PPC_REL16DX_HA)
9693 {
9694 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9695 if (rel->r_offset + 4 > input_section->size)
9696 r = bfd_reloc_outofrange;
9697 else
9698 {
9699 unsigned int insn;
9700
9701 relocation += addend;
9702 relocation -= (rel->r_offset
9703 + input_section->output_offset
9704 + input_section->output_section->vma);
9705 relocation >>= 16;
9706 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9707 insn &= ~0x1fffc1;
9708 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9709 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9710 r = bfd_reloc_ok;
9711 }
9712 }
9713 else
9714 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9715 rel->r_offset, relocation, addend);
9716
9717 if (r != bfd_reloc_ok)
9718 {
9719 if (r == bfd_reloc_overflow)
9720 {
9721 overflow:
9722 /* On code like "if (foo) foo();" don't report overflow
9723 on a branch to zero when foo is undefined. */
9724 if (!warned
9725 && !(h != NULL
9726 && (h->root.type == bfd_link_hash_undefweak
9727 || h->root.type == bfd_link_hash_undefined)
9728 && is_branch_reloc (r_type)))
9729 info->callbacks->reloc_overflow
9730 (info, (h ? &h->root : NULL), sym_name, howto->name,
9731 rel->r_addend, input_bfd, input_section, rel->r_offset);
9732 }
9733 else
9734 {
9735 info->callbacks->einfo
9736 /* xgettext:c-format */
9737 (_("%H: %s reloc against `%s': error %d\n"),
9738 input_bfd, input_section, rel->r_offset,
9739 howto->name, sym_name, (int) r);
9740 ret = FALSE;
9741 }
9742 }
9743 copy_reloc:
9744 if (wrel != rel)
9745 *wrel = *rel;
9746 }
9747
9748 if (wrel != rel)
9749 {
9750 Elf_Internal_Shdr *rel_hdr;
9751 size_t deleted = rel - wrel;
9752
9753 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9754 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9755 if (rel_hdr->sh_size == 0)
9756 {
9757 /* It is too late to remove an empty reloc section. Leave
9758 one NONE reloc.
9759 ??? What is wrong with an empty section??? */
9760 rel_hdr->sh_size = rel_hdr->sh_entsize;
9761 deleted -= 1;
9762 wrel++;
9763 }
9764 relend = wrel;
9765 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9766 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9767 input_section->reloc_count -= deleted;
9768 }
9769
9770 #ifdef DEBUG
9771 fprintf (stderr, "\n");
9772 #endif
9773
9774 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9775 && input_section->size != input_section->rawsize
9776 && (strcmp (input_section->output_section->name, ".init") == 0
9777 || strcmp (input_section->output_section->name, ".fini") == 0))
9778 {
9779 /* Branch around the trampolines. */
9780 unsigned int insn = B + input_section->size - input_section->rawsize;
9781 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9782 }
9783
9784 if (htab->params->ppc476_workaround
9785 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9786 && (!bfd_link_relocatable (info)
9787 || (input_section->output_section->alignment_power
9788 >= htab->params->pagesize_p2)))
9789 {
9790 bfd_vma start_addr, end_addr, addr;
9791 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9792
9793 if (relax_info->workaround_size != 0)
9794 {
9795 bfd_byte *p;
9796 unsigned int n;
9797 bfd_byte fill[4];
9798
9799 bfd_put_32 (input_bfd, BA, fill);
9800 p = contents + input_section->size - relax_info->workaround_size;
9801 n = relax_info->workaround_size >> 2;
9802 while (n--)
9803 {
9804 memcpy (p, fill, 4);
9805 p += 4;
9806 }
9807 }
9808
9809 /* The idea is: Replace the last instruction on a page with a
9810 branch to a patch area. Put the insn there followed by a
9811 branch back to the next page. Complicated a little by
9812 needing to handle moved conditional branches, and by not
9813 wanting to touch data-in-text. */
9814
9815 start_addr = (input_section->output_section->vma
9816 + input_section->output_offset);
9817 end_addr = (start_addr + input_section->size
9818 - relax_info->workaround_size);
9819 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9820 addr < end_addr;
9821 addr += pagesize)
9822 {
9823 bfd_vma offset = addr - start_addr;
9824 Elf_Internal_Rela *lo, *hi;
9825 bfd_boolean is_data;
9826 bfd_vma patch_off, patch_addr;
9827 unsigned int insn;
9828
9829 /* Do we have a data reloc at this offset? If so, leave
9830 the word alone. */
9831 is_data = FALSE;
9832 lo = relocs;
9833 hi = relend;
9834 rel = NULL;
9835 while (lo < hi)
9836 {
9837 rel = lo + (hi - lo) / 2;
9838 if (rel->r_offset < offset)
9839 lo = rel + 1;
9840 else if (rel->r_offset > offset + 3)
9841 hi = rel;
9842 else
9843 {
9844 switch (ELF32_R_TYPE (rel->r_info))
9845 {
9846 case R_PPC_ADDR32:
9847 case R_PPC_UADDR32:
9848 case R_PPC_REL32:
9849 case R_PPC_ADDR30:
9850 is_data = TRUE;
9851 break;
9852 default:
9853 break;
9854 }
9855 break;
9856 }
9857 }
9858 if (is_data)
9859 continue;
9860
9861 /* Some instructions can be left alone too. Unconditional
9862 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9863 avoid the icache failure.
9864
9865 The problem occurs due to prefetch across a page boundary
9866 where stale instructions can be fetched from the next
9867 page, and the mechanism for flushing these bad
9868 instructions fails under certain circumstances. The
9869 unconditional branches:
9870 1) Branch: b, bl, ba, bla,
9871 2) Branch Conditional: bc, bca, bcl, bcla,
9872 3) Branch Conditional to Link Register: bclr, bclrl,
9873 where (2) and (3) have BO=0x14 making them unconditional,
9874 prevent the bad prefetch because the prefetch itself is
9875 affected by these instructions. This happens even if the
9876 instruction is not executed.
9877
9878 A bctr example:
9879 .
9880 . lis 9,new_page@ha
9881 . addi 9,9,new_page@l
9882 . mtctr 9
9883 . bctr
9884 . nop
9885 . nop
9886 . new_page:
9887 .
9888 The bctr is not predicted taken due to ctr not being
9889 ready, so prefetch continues on past the bctr into the
9890 new page which might have stale instructions. If they
9891 fail to be flushed, then they will be executed after the
9892 bctr executes. Either of the following modifications
9893 prevent the bad prefetch from happening in the first
9894 place:
9895 .
9896 . lis 9,new_page@ha lis 9,new_page@ha
9897 . addi 9,9,new_page@l addi 9,9,new_page@l
9898 . mtctr 9 mtctr 9
9899 . bctr bctr
9900 . nop b somewhere_else
9901 . b somewhere_else nop
9902 . new_page: new_page:
9903 . */
9904 insn = bfd_get_32 (input_bfd, contents + offset);
9905 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9906 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9907 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9908 || ((insn & (0x3f << 26)) == (19u << 26)
9909 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9910 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9911 continue;
9912
9913 patch_addr = (start_addr + input_section->size
9914 - relax_info->workaround_size);
9915 patch_addr = (patch_addr + 15) & -16;
9916 patch_off = patch_addr - start_addr;
9917 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9918
9919 if (rel != NULL
9920 && rel->r_offset >= offset
9921 && rel->r_offset < offset + 4)
9922 {
9923 asection *sreloc;
9924
9925 /* If the insn we are patching had a reloc, adjust the
9926 reloc r_offset so that the reloc applies to the moved
9927 location. This matters for -r and --emit-relocs. */
9928 if (rel + 1 != relend)
9929 {
9930 Elf_Internal_Rela tmp = *rel;
9931
9932 /* Keep the relocs sorted by r_offset. */
9933 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9934 relend[-1] = tmp;
9935 }
9936 relend[-1].r_offset += patch_off - offset;
9937
9938 /* Adjust REL16 addends too. */
9939 switch (ELF32_R_TYPE (relend[-1].r_info))
9940 {
9941 case R_PPC_REL16:
9942 case R_PPC_REL16_LO:
9943 case R_PPC_REL16_HI:
9944 case R_PPC_REL16_HA:
9945 relend[-1].r_addend += patch_off - offset;
9946 break;
9947 default:
9948 break;
9949 }
9950
9951 /* If we are building a PIE or shared library with
9952 non-PIC objects, perhaps we had a dynamic reloc too?
9953 If so, the dynamic reloc must move with the insn. */
9954 sreloc = elf_section_data (input_section)->sreloc;
9955 if (sreloc != NULL)
9956 {
9957 Elf32_External_Rela *slo, *shi, *srelend;
9958 bfd_vma soffset;
9959
9960 slo = (Elf32_External_Rela *) sreloc->contents;
9961 shi = srelend = slo + sreloc->reloc_count;
9962 soffset = (offset + input_section->output_section->vma
9963 + input_section->output_offset);
9964 while (slo < shi)
9965 {
9966 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9967 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9968 &outrel);
9969 if (outrel.r_offset < soffset)
9970 slo = srel + 1;
9971 else if (outrel.r_offset > soffset + 3)
9972 shi = srel;
9973 else
9974 {
9975 if (srel + 1 != srelend)
9976 {
9977 memmove (srel, srel + 1,
9978 (srelend - (srel + 1)) * sizeof (*srel));
9979 srel = srelend - 1;
9980 }
9981 outrel.r_offset += patch_off - offset;
9982 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9983 (bfd_byte *) srel);
9984 break;
9985 }
9986 }
9987 }
9988 }
9989 else
9990 rel = NULL;
9991
9992 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9993 && (insn & 2) == 0 /* relative */)
9994 {
9995 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9996
9997 delta += offset - patch_off;
9998 if (bfd_link_relocatable (info) && rel != NULL)
9999 delta = 0;
10000 if (!bfd_link_relocatable (info) && rel != NULL)
10001 {
10002 enum elf_ppc_reloc_type r_type;
10003
10004 r_type = ELF32_R_TYPE (relend[-1].r_info);
10005 if (r_type == R_PPC_REL14_BRTAKEN)
10006 insn |= BRANCH_PREDICT_BIT;
10007 else if (r_type == R_PPC_REL14_BRNTAKEN)
10008 insn &= ~BRANCH_PREDICT_BIT;
10009 else
10010 BFD_ASSERT (r_type == R_PPC_REL14);
10011
10012 if ((r_type == R_PPC_REL14_BRTAKEN
10013 || r_type == R_PPC_REL14_BRNTAKEN)
10014 && delta + 0x8000 < 0x10000
10015 && (bfd_signed_vma) delta < 0)
10016 insn ^= BRANCH_PREDICT_BIT;
10017 }
10018 if (delta + 0x8000 < 0x10000)
10019 {
10020 bfd_put_32 (input_bfd,
10021 (insn & ~0xfffc) | (delta & 0xfffc),
10022 contents + patch_off);
10023 patch_off += 4;
10024 bfd_put_32 (input_bfd,
10025 B | ((offset + 4 - patch_off) & 0x3fffffc),
10026 contents + patch_off);
10027 patch_off += 4;
10028 }
10029 else
10030 {
10031 if (rel != NULL)
10032 {
10033 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10034
10035 relend[-1].r_offset += 8;
10036 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10037 }
10038 bfd_put_32 (input_bfd,
10039 (insn & ~0xfffc) | 8,
10040 contents + patch_off);
10041 patch_off += 4;
10042 bfd_put_32 (input_bfd,
10043 B | ((offset + 4 - patch_off) & 0x3fffffc),
10044 contents + patch_off);
10045 patch_off += 4;
10046 bfd_put_32 (input_bfd,
10047 B | ((delta - 8) & 0x3fffffc),
10048 contents + patch_off);
10049 patch_off += 4;
10050 }
10051 }
10052 else
10053 {
10054 bfd_put_32 (input_bfd, insn, contents + patch_off);
10055 patch_off += 4;
10056 bfd_put_32 (input_bfd,
10057 B | ((offset + 4 - patch_off) & 0x3fffffc),
10058 contents + patch_off);
10059 patch_off += 4;
10060 }
10061 BFD_ASSERT (patch_off <= input_section->size);
10062 relax_info->workaround_size = input_section->size - patch_off;
10063 }
10064 }
10065
10066 return ret;
10067 }
10068 \f
10069 /* Finish up dynamic symbol handling. We set the contents of various
10070 dynamic sections here. */
10071
10072 static bfd_boolean
10073 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10074 struct bfd_link_info *info,
10075 struct elf_link_hash_entry *h,
10076 Elf_Internal_Sym *sym)
10077 {
10078 struct ppc_elf_link_hash_table *htab;
10079 struct plt_entry *ent;
10080 bfd_boolean doneone;
10081
10082 #ifdef DEBUG
10083 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10084 h->root.root.string);
10085 #endif
10086
10087 htab = ppc_elf_hash_table (info);
10088 BFD_ASSERT (htab->elf.dynobj != NULL);
10089
10090 doneone = FALSE;
10091 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10092 if (ent->plt.offset != (bfd_vma) -1)
10093 {
10094 if (!doneone)
10095 {
10096 Elf_Internal_Rela rela;
10097 bfd_byte *loc;
10098 bfd_vma reloc_index;
10099
10100 if (htab->plt_type == PLT_NEW
10101 || !htab->elf.dynamic_sections_created
10102 || h->dynindx == -1)
10103 reloc_index = ent->plt.offset / 4;
10104 else
10105 {
10106 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10107 / htab->plt_slot_size);
10108 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10109 && htab->plt_type == PLT_OLD)
10110 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10111 }
10112
10113 /* This symbol has an entry in the procedure linkage table.
10114 Set it up. */
10115 if (htab->plt_type == PLT_VXWORKS
10116 && htab->elf.dynamic_sections_created
10117 && h->dynindx != -1)
10118 {
10119 bfd_vma got_offset;
10120 const bfd_vma *plt_entry;
10121
10122 /* The first three entries in .got.plt are reserved. */
10123 got_offset = (reloc_index + 3) * 4;
10124
10125 /* Use the right PLT. */
10126 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10127 : ppc_elf_vxworks_plt_entry;
10128
10129 /* Fill in the .plt on VxWorks. */
10130 if (bfd_link_pic (info))
10131 {
10132 bfd_put_32 (output_bfd,
10133 plt_entry[0] | PPC_HA (got_offset),
10134 htab->elf.splt->contents + ent->plt.offset + 0);
10135 bfd_put_32 (output_bfd,
10136 plt_entry[1] | PPC_LO (got_offset),
10137 htab->elf.splt->contents + ent->plt.offset + 4);
10138 }
10139 else
10140 {
10141 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10142
10143 bfd_put_32 (output_bfd,
10144 plt_entry[0] | PPC_HA (got_loc),
10145 htab->elf.splt->contents + ent->plt.offset + 0);
10146 bfd_put_32 (output_bfd,
10147 plt_entry[1] | PPC_LO (got_loc),
10148 htab->elf.splt->contents + ent->plt.offset + 4);
10149 }
10150
10151 bfd_put_32 (output_bfd, plt_entry[2],
10152 htab->elf.splt->contents + ent->plt.offset + 8);
10153 bfd_put_32 (output_bfd, plt_entry[3],
10154 htab->elf.splt->contents + ent->plt.offset + 12);
10155
10156 /* This instruction is an immediate load. The value loaded is
10157 the byte offset of the R_PPC_JMP_SLOT relocation from the
10158 start of the .rela.plt section. The value is stored in the
10159 low-order 16 bits of the load instruction. */
10160 /* NOTE: It appears that this is now an index rather than a
10161 prescaled offset. */
10162 bfd_put_32 (output_bfd,
10163 plt_entry[4] | reloc_index,
10164 htab->elf.splt->contents + ent->plt.offset + 16);
10165 /* This instruction is a PC-relative branch whose target is
10166 the start of the PLT section. The address of this branch
10167 instruction is 20 bytes beyond the start of this PLT entry.
10168 The address is encoded in bits 6-29, inclusive. The value
10169 stored is right-shifted by two bits, permitting a 26-bit
10170 offset. */
10171 bfd_put_32 (output_bfd,
10172 (plt_entry[5]
10173 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10174 htab->elf.splt->contents + ent->plt.offset + 20);
10175 bfd_put_32 (output_bfd, plt_entry[6],
10176 htab->elf.splt->contents + ent->plt.offset + 24);
10177 bfd_put_32 (output_bfd, plt_entry[7],
10178 htab->elf.splt->contents + ent->plt.offset + 28);
10179
10180 /* Fill in the GOT entry corresponding to this PLT slot with
10181 the address immediately after the "bctr" instruction
10182 in this PLT entry. */
10183 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10184 + htab->elf.splt->output_offset
10185 + ent->plt.offset + 16),
10186 htab->elf.sgotplt->contents + got_offset);
10187
10188 if (!bfd_link_pic (info))
10189 {
10190 /* Fill in a couple of entries in .rela.plt.unloaded. */
10191 loc = htab->srelplt2->contents
10192 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10193 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10194 * sizeof (Elf32_External_Rela));
10195
10196 /* Provide the @ha relocation for the first instruction. */
10197 rela.r_offset = (htab->elf.splt->output_section->vma
10198 + htab->elf.splt->output_offset
10199 + ent->plt.offset + 2);
10200 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10201 R_PPC_ADDR16_HA);
10202 rela.r_addend = got_offset;
10203 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10204 loc += sizeof (Elf32_External_Rela);
10205
10206 /* Provide the @l relocation for the second instruction. */
10207 rela.r_offset = (htab->elf.splt->output_section->vma
10208 + htab->elf.splt->output_offset
10209 + ent->plt.offset + 6);
10210 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10211 R_PPC_ADDR16_LO);
10212 rela.r_addend = got_offset;
10213 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10214 loc += sizeof (Elf32_External_Rela);
10215
10216 /* Provide a relocation for the GOT entry corresponding to this
10217 PLT slot. Point it at the middle of the .plt entry. */
10218 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10219 + htab->elf.sgotplt->output_offset
10220 + got_offset);
10221 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10222 R_PPC_ADDR32);
10223 rela.r_addend = ent->plt.offset + 16;
10224 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10225 }
10226
10227 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10228 In particular, the offset for the relocation is not the
10229 address of the PLT entry for this function, as specified
10230 by the ABI. Instead, the offset is set to the address of
10231 the GOT slot for this function. See EABI 4.4.4.1. */
10232 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10233 + htab->elf.sgotplt->output_offset
10234 + got_offset);
10235
10236 }
10237 else
10238 {
10239 asection *splt = htab->elf.splt;
10240 if (!htab->elf.dynamic_sections_created
10241 || h->dynindx == -1)
10242 splt = htab->elf.iplt;
10243
10244 rela.r_offset = (splt->output_section->vma
10245 + splt->output_offset
10246 + ent->plt.offset);
10247 if (htab->plt_type == PLT_OLD
10248 || !htab->elf.dynamic_sections_created
10249 || h->dynindx == -1)
10250 {
10251 /* We don't need to fill in the .plt. The ppc dynamic
10252 linker will fill it in. */
10253 }
10254 else
10255 {
10256 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10257 + htab->glink->output_section->vma
10258 + htab->glink->output_offset);
10259 bfd_put_32 (output_bfd, val,
10260 splt->contents + ent->plt.offset);
10261 }
10262 }
10263
10264 /* Fill in the entry in the .rela.plt section. */
10265 rela.r_addend = 0;
10266 if (!htab->elf.dynamic_sections_created
10267 || h->dynindx == -1)
10268 {
10269 BFD_ASSERT (h->type == STT_GNU_IFUNC
10270 && h->def_regular
10271 && (h->root.type == bfd_link_hash_defined
10272 || h->root.type == bfd_link_hash_defweak));
10273 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10274 rela.r_addend = SYM_VAL (h);
10275 }
10276 else
10277 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10278
10279 if (!htab->elf.dynamic_sections_created
10280 || h->dynindx == -1)
10281 {
10282 loc = (htab->elf.irelplt->contents
10283 + (htab->elf.irelplt->reloc_count++
10284 * sizeof (Elf32_External_Rela)));
10285 htab->local_ifunc_resolver = 1;
10286 }
10287 else
10288 {
10289 loc = (htab->elf.srelplt->contents
10290 + reloc_index * sizeof (Elf32_External_Rela));
10291 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10292 htab->maybe_local_ifunc_resolver = 1;
10293 }
10294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10295
10296 if (!h->def_regular)
10297 {
10298 /* Mark the symbol as undefined, rather than as
10299 defined in the .plt section. Leave the value if
10300 there were any relocations where pointer equality
10301 matters (this is a clue for the dynamic linker, to
10302 make function pointer comparisons work between an
10303 application and shared library), otherwise set it
10304 to zero. */
10305 sym->st_shndx = SHN_UNDEF;
10306 if (!h->pointer_equality_needed)
10307 sym->st_value = 0;
10308 else if (!h->ref_regular_nonweak)
10309 {
10310 /* This breaks function pointer comparisons, but
10311 that is better than breaking tests for a NULL
10312 function pointer. */
10313 sym->st_value = 0;
10314 }
10315 }
10316 else if (h->type == STT_GNU_IFUNC
10317 && !bfd_link_pic (info))
10318 {
10319 /* Set the value of ifunc symbols in a non-pie
10320 executable to the glink entry. This is to avoid
10321 text relocations. We can't do this for ifunc in
10322 allocate_dynrelocs, as we do for normal dynamic
10323 function symbols with plt entries, because we need
10324 to keep the original value around for the ifunc
10325 relocation. */
10326 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10327 (output_bfd, htab->glink->output_section));
10328 sym->st_value = (ent->glink_offset
10329 + htab->glink->output_offset
10330 + htab->glink->output_section->vma);
10331 }
10332 doneone = TRUE;
10333 }
10334
10335 if (htab->plt_type == PLT_NEW
10336 || !htab->elf.dynamic_sections_created
10337 || h->dynindx == -1)
10338 {
10339 unsigned char *p;
10340 asection *splt = htab->elf.splt;
10341 if (!htab->elf.dynamic_sections_created
10342 || h->dynindx == -1)
10343 splt = htab->elf.iplt;
10344
10345 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10346
10347 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10348 {
10349 bfd_put_32 (output_bfd, LWZ_11_3, p);
10350 p += 4;
10351 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10352 p += 4;
10353 bfd_put_32 (output_bfd, MR_0_3, p);
10354 p += 4;
10355 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10356 p += 4;
10357 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10358 p += 4;
10359 bfd_put_32 (output_bfd, BEQLR, p);
10360 p += 4;
10361 bfd_put_32 (output_bfd, MR_3_0, p);
10362 p += 4;
10363 bfd_put_32 (output_bfd, NOP, p);
10364 p += 4;
10365 }
10366
10367 write_glink_stub (ent, splt, p, info);
10368
10369 if (!bfd_link_pic (info))
10370 /* We only need one non-PIC glink stub. */
10371 break;
10372 }
10373 else
10374 break;
10375 }
10376
10377 if (h->needs_copy)
10378 {
10379 asection *s;
10380 Elf_Internal_Rela rela;
10381 bfd_byte *loc;
10382
10383 /* This symbols needs a copy reloc. Set it up. */
10384
10385 #ifdef DEBUG
10386 fprintf (stderr, ", copy");
10387 #endif
10388
10389 BFD_ASSERT (h->dynindx != -1);
10390
10391 if (ppc_elf_hash_entry (h)->has_sda_refs)
10392 s = htab->relsbss;
10393 else if (h->root.u.def.section == htab->elf.sdynrelro)
10394 s = htab->elf.sreldynrelro;
10395 else
10396 s = htab->elf.srelbss;
10397 BFD_ASSERT (s != NULL);
10398
10399 rela.r_offset = SYM_VAL (h);
10400 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10401 rela.r_addend = 0;
10402 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10403 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10404 }
10405
10406 #ifdef DEBUG
10407 fprintf (stderr, "\n");
10408 #endif
10409
10410 return TRUE;
10411 }
10412 \f
10413 static enum elf_reloc_type_class
10414 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10415 const asection *rel_sec,
10416 const Elf_Internal_Rela *rela)
10417 {
10418 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10419
10420 if (rel_sec == htab->elf.irelplt)
10421 return reloc_class_ifunc;
10422
10423 switch (ELF32_R_TYPE (rela->r_info))
10424 {
10425 case R_PPC_RELATIVE:
10426 return reloc_class_relative;
10427 case R_PPC_JMP_SLOT:
10428 return reloc_class_plt;
10429 case R_PPC_COPY:
10430 return reloc_class_copy;
10431 default:
10432 return reloc_class_normal;
10433 }
10434 }
10435 \f
10436 /* Finish up the dynamic sections. */
10437
10438 static bfd_boolean
10439 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10440 struct bfd_link_info *info)
10441 {
10442 asection *sdyn;
10443 struct ppc_elf_link_hash_table *htab;
10444 bfd_vma got;
10445 bfd *dynobj;
10446 bfd_boolean ret = TRUE;
10447
10448 #ifdef DEBUG
10449 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10450 #endif
10451
10452 htab = ppc_elf_hash_table (info);
10453 dynobj = htab->elf.dynobj;
10454 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10455
10456 got = 0;
10457 if (htab->elf.hgot != NULL)
10458 got = SYM_VAL (htab->elf.hgot);
10459
10460 if (htab->elf.dynamic_sections_created)
10461 {
10462 Elf32_External_Dyn *dyncon, *dynconend;
10463
10464 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10465
10466 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10467 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10468 for (; dyncon < dynconend; dyncon++)
10469 {
10470 Elf_Internal_Dyn dyn;
10471 asection *s;
10472
10473 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10474
10475 switch (dyn.d_tag)
10476 {
10477 case DT_PLTGOT:
10478 if (htab->is_vxworks)
10479 s = htab->elf.sgotplt;
10480 else
10481 s = htab->elf.splt;
10482 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10483 break;
10484
10485 case DT_PLTRELSZ:
10486 dyn.d_un.d_val = htab->elf.srelplt->size;
10487 break;
10488
10489 case DT_JMPREL:
10490 s = htab->elf.srelplt;
10491 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10492 break;
10493
10494 case DT_PPC_GOT:
10495 dyn.d_un.d_ptr = got;
10496 break;
10497
10498 case DT_TEXTREL:
10499 if (htab->local_ifunc_resolver)
10500 info->callbacks->einfo
10501 (_("%X%P: text relocations and GNU indirect "
10502 "functions will result in a segfault at runtime\n"));
10503 else if (htab->maybe_local_ifunc_resolver)
10504 info->callbacks->einfo
10505 (_("%P: warning: text relocations and GNU indirect "
10506 "functions may result in a segfault at runtime\n"));
10507 continue;
10508
10509 default:
10510 if (htab->is_vxworks
10511 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10512 break;
10513 continue;
10514 }
10515
10516 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10517 }
10518 }
10519
10520 if (htab->elf.sgot != NULL
10521 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10522 {
10523 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10524 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10525 {
10526 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10527
10528 p += htab->elf.hgot->root.u.def.value;
10529 if (htab->plt_type == PLT_OLD)
10530 {
10531 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10532 so that a function can easily find the address of
10533 _GLOBAL_OFFSET_TABLE_. */
10534 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10535 < htab->elf.hgot->root.u.def.section->size);
10536 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10537 }
10538
10539 if (sdyn != NULL)
10540 {
10541 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10542 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10543 < htab->elf.hgot->root.u.def.section->size);
10544 bfd_put_32 (output_bfd, val, p);
10545 }
10546 }
10547 else
10548 {
10549 /* xgettext:c-format */
10550 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10551 htab->elf.hgot->root.root.string,
10552 (htab->elf.sgotplt != NULL
10553 ? htab->elf.sgotplt->name
10554 : htab->elf.sgot->name));
10555 bfd_set_error (bfd_error_bad_value);
10556 ret = FALSE;
10557 }
10558
10559 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10560 }
10561
10562 /* Fill in the first entry in the VxWorks procedure linkage table. */
10563 if (htab->is_vxworks
10564 && htab->elf.splt != NULL
10565 && htab->elf.splt->size != 0
10566 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10567 {
10568 asection *splt = htab->elf.splt;
10569 /* Use the right PLT. */
10570 const bfd_vma *plt_entry = (bfd_link_pic (info)
10571 ? ppc_elf_vxworks_pic_plt0_entry
10572 : ppc_elf_vxworks_plt0_entry);
10573
10574 if (!bfd_link_pic (info))
10575 {
10576 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10577
10578 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10579 splt->contents + 0);
10580 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10581 splt->contents + 4);
10582 }
10583 else
10584 {
10585 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10586 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10587 }
10588 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10589 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10590 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10591 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10592 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10593 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10594
10595 if (! bfd_link_pic (info))
10596 {
10597 Elf_Internal_Rela rela;
10598 bfd_byte *loc;
10599
10600 loc = htab->srelplt2->contents;
10601
10602 /* Output the @ha relocation for the first instruction. */
10603 rela.r_offset = (htab->elf.splt->output_section->vma
10604 + htab->elf.splt->output_offset
10605 + 2);
10606 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10607 rela.r_addend = 0;
10608 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10609 loc += sizeof (Elf32_External_Rela);
10610
10611 /* Output the @l relocation for the second instruction. */
10612 rela.r_offset = (htab->elf.splt->output_section->vma
10613 + htab->elf.splt->output_offset
10614 + 6);
10615 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10616 rela.r_addend = 0;
10617 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10618 loc += sizeof (Elf32_External_Rela);
10619
10620 /* Fix up the remaining relocations. They may have the wrong
10621 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10622 in which symbols were output. */
10623 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10624 {
10625 Elf_Internal_Rela rel;
10626
10627 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10628 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10629 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10630 loc += sizeof (Elf32_External_Rela);
10631
10632 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10633 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10634 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10635 loc += sizeof (Elf32_External_Rela);
10636
10637 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10638 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10639 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10640 loc += sizeof (Elf32_External_Rela);
10641 }
10642 }
10643 }
10644
10645 if (htab->glink != NULL
10646 && htab->glink->contents != NULL
10647 && htab->elf.dynamic_sections_created)
10648 {
10649 unsigned char *p;
10650 unsigned char *endp;
10651 bfd_vma res0;
10652 unsigned int i;
10653
10654 /*
10655 * PIC glink code is the following:
10656 *
10657 * # ith PLT code stub.
10658 * addis 11,30,(plt+(i-1)*4-got)@ha
10659 * lwz 11,(plt+(i-1)*4-got)@l(11)
10660 * mtctr 11
10661 * bctr
10662 *
10663 * # A table of branches, one for each plt entry.
10664 * # The idea is that the plt call stub loads ctr and r11 with these
10665 * # addresses, so (r11 - res_0) gives the plt index * 4.
10666 * res_0: b PLTresolve
10667 * res_1: b PLTresolve
10668 * .
10669 * # Some number of entries towards the end can be nops
10670 * res_n_m3: nop
10671 * res_n_m2: nop
10672 * res_n_m1:
10673 *
10674 * PLTresolve:
10675 * addis 11,11,(1f-res_0)@ha
10676 * mflr 0
10677 * bcl 20,31,1f
10678 * 1: addi 11,11,(1b-res_0)@l
10679 * mflr 12
10680 * mtlr 0
10681 * sub 11,11,12 # r11 = index * 4
10682 * addis 12,12,(got+4-1b)@ha
10683 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10684 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10685 * mtctr 0
10686 * add 0,11,11
10687 * add 11,0,11 # r11 = index * 12 = reloc offset.
10688 * bctr
10689 */
10690 static const unsigned int pic_plt_resolve[] =
10691 {
10692 ADDIS_11_11,
10693 MFLR_0,
10694 BCL_20_31,
10695 ADDI_11_11,
10696 MFLR_12,
10697 MTLR_0,
10698 SUB_11_11_12,
10699 ADDIS_12_12,
10700 LWZ_0_12,
10701 LWZ_12_12,
10702 MTCTR_0,
10703 ADD_0_11_11,
10704 ADD_11_0_11,
10705 BCTR,
10706 NOP,
10707 NOP
10708 };
10709
10710 /*
10711 * Non-PIC glink code is a little simpler.
10712 *
10713 * # ith PLT code stub.
10714 * lis 11,(plt+(i-1)*4)@ha
10715 * lwz 11,(plt+(i-1)*4)@l(11)
10716 * mtctr 11
10717 * bctr
10718 *
10719 * The branch table is the same, then comes
10720 *
10721 * PLTresolve:
10722 * lis 12,(got+4)@ha
10723 * addis 11,11,(-res_0)@ha
10724 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10725 * addi 11,11,(-res_0)@l # r11 = index * 4
10726 * mtctr 0
10727 * add 0,11,11
10728 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10729 * add 11,0,11 # r11 = index * 12 = reloc offset.
10730 * bctr
10731 */
10732 static const unsigned int plt_resolve[] =
10733 {
10734 LIS_12,
10735 ADDIS_11_11,
10736 LWZ_0_12,
10737 ADDI_11_11,
10738 MTCTR_0,
10739 ADD_0_11_11,
10740 LWZ_12_12,
10741 ADD_11_0_11,
10742 BCTR,
10743 NOP,
10744 NOP,
10745 NOP,
10746 NOP,
10747 NOP,
10748 NOP,
10749 NOP
10750 };
10751
10752 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10753 abort ();
10754 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10755 abort ();
10756
10757 /* Build the branch table, one for each plt entry (less one),
10758 and perhaps some padding. */
10759 p = htab->glink->contents;
10760 p += htab->glink_pltresolve;
10761 endp = htab->glink->contents;
10762 endp += htab->glink->size - GLINK_PLTRESOLVE;
10763 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10764 {
10765 bfd_put_32 (output_bfd, B + endp - p, p);
10766 p += 4;
10767 }
10768 while (p < endp)
10769 {
10770 bfd_put_32 (output_bfd, NOP, p);
10771 p += 4;
10772 }
10773
10774 res0 = (htab->glink_pltresolve
10775 + htab->glink->output_section->vma
10776 + htab->glink->output_offset);
10777
10778 if (htab->params->ppc476_workaround)
10779 {
10780 /* Ensure that a call stub at the end of a page doesn't
10781 result in prefetch over the end of the page into the
10782 glink branch table. */
10783 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10784 bfd_vma page_addr;
10785 bfd_vma glink_start = (htab->glink->output_section->vma
10786 + htab->glink->output_offset);
10787
10788 for (page_addr = res0 & -pagesize;
10789 page_addr > glink_start;
10790 page_addr -= pagesize)
10791 {
10792 /* We have a plt call stub that may need fixing. */
10793 bfd_byte *loc;
10794 unsigned int insn;
10795
10796 loc = htab->glink->contents + page_addr - 4 - glink_start;
10797 insn = bfd_get_32 (output_bfd, loc);
10798 if (insn == BCTR)
10799 {
10800 /* By alignment, we know that there must be at least
10801 one other call stub before this one. */
10802 insn = bfd_get_32 (output_bfd, loc - 16);
10803 if (insn == BCTR)
10804 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10805 else
10806 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10807 }
10808 }
10809 }
10810
10811 /* Last comes the PLTresolve stub. */
10812 if (bfd_link_pic (info))
10813 {
10814 bfd_vma bcl;
10815
10816 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10817 {
10818 unsigned int insn = pic_plt_resolve[i];
10819
10820 if (htab->params->ppc476_workaround && insn == NOP)
10821 insn = BA + 0;
10822 bfd_put_32 (output_bfd, insn, p);
10823 p += 4;
10824 }
10825 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10826
10827 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10828 + htab->glink->output_section->vma
10829 + htab->glink->output_offset);
10830
10831 bfd_put_32 (output_bfd,
10832 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10833 bfd_put_32 (output_bfd,
10834 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10835 bfd_put_32 (output_bfd,
10836 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10837 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10838 {
10839 bfd_put_32 (output_bfd,
10840 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10841 bfd_put_32 (output_bfd,
10842 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10843 }
10844 else
10845 {
10846 bfd_put_32 (output_bfd,
10847 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10848 bfd_put_32 (output_bfd,
10849 LWZ_12_12 + 4, p + 9*4);
10850 }
10851 }
10852 else
10853 {
10854 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10855 {
10856 unsigned int insn = plt_resolve[i];
10857
10858 if (htab->params->ppc476_workaround && insn == NOP)
10859 insn = BA + 0;
10860 bfd_put_32 (output_bfd, insn, p);
10861 p += 4;
10862 }
10863 p -= 4 * ARRAY_SIZE (plt_resolve);
10864
10865 bfd_put_32 (output_bfd,
10866 LIS_12 + PPC_HA (got + 4), p + 0*4);
10867 bfd_put_32 (output_bfd,
10868 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10869 bfd_put_32 (output_bfd,
10870 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10871 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10872 {
10873 bfd_put_32 (output_bfd,
10874 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10875 bfd_put_32 (output_bfd,
10876 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10877 }
10878 else
10879 {
10880 bfd_put_32 (output_bfd,
10881 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10882 bfd_put_32 (output_bfd,
10883 LWZ_12_12 + 4, p + 6*4);
10884 }
10885 }
10886 }
10887
10888 if (htab->glink_eh_frame != NULL
10889 && htab->glink_eh_frame->contents != NULL)
10890 {
10891 unsigned char *p = htab->glink_eh_frame->contents;
10892 bfd_vma val;
10893
10894 p += sizeof (glink_eh_frame_cie);
10895 /* FDE length. */
10896 p += 4;
10897 /* CIE pointer. */
10898 p += 4;
10899 /* Offset to .glink. */
10900 val = (htab->glink->output_section->vma
10901 + htab->glink->output_offset);
10902 val -= (htab->glink_eh_frame->output_section->vma
10903 + htab->glink_eh_frame->output_offset);
10904 val -= p - htab->glink_eh_frame->contents;
10905 bfd_put_32 (htab->elf.dynobj, val, p);
10906
10907 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10908 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10909 htab->glink_eh_frame,
10910 htab->glink_eh_frame->contents))
10911 return FALSE;
10912 }
10913
10914 return ret;
10915 }
10916 \f
10917 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10918 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10919 #define TARGET_BIG_SYM powerpc_elf32_vec
10920 #define TARGET_BIG_NAME "elf32-powerpc"
10921 #define ELF_ARCH bfd_arch_powerpc
10922 #define ELF_TARGET_ID PPC32_ELF_DATA
10923 #define ELF_MACHINE_CODE EM_PPC
10924 #ifdef __QNXTARGET__
10925 #define ELF_MAXPAGESIZE 0x1000
10926 #define ELF_COMMONPAGESIZE 0x1000
10927 #else
10928 #define ELF_MAXPAGESIZE 0x10000
10929 #define ELF_COMMONPAGESIZE 0x10000
10930 #endif
10931 #define ELF_MINPAGESIZE 0x1000
10932 #define elf_info_to_howto ppc_elf_info_to_howto
10933
10934 #ifdef EM_CYGNUS_POWERPC
10935 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10936 #endif
10937
10938 #ifdef EM_PPC_OLD
10939 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10940 #endif
10941
10942 #define elf_backend_plt_not_loaded 1
10943 #define elf_backend_want_dynrelro 1
10944 #define elf_backend_can_gc_sections 1
10945 #define elf_backend_can_refcount 1
10946 #define elf_backend_rela_normal 1
10947 #define elf_backend_caches_rawsize 1
10948
10949 #define bfd_elf32_mkobject ppc_elf_mkobject
10950 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10951 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10952 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10953 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10954 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10955 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10956 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10957
10958 #define elf_backend_object_p ppc_elf_object_p
10959 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10960 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10961 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10962 #define elf_backend_relocate_section ppc_elf_relocate_section
10963 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10964 #define elf_backend_check_relocs ppc_elf_check_relocs
10965 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10966 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10967 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10968 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10969 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10970 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10971 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10972 #define elf_backend_fake_sections ppc_elf_fake_sections
10973 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10974 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10975 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10976 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10977 #define elf_backend_write_core_note ppc_elf_write_core_note
10978 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10979 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10980 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10981 #define elf_backend_write_section ppc_elf_write_section
10982 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10983 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10984 #define elf_backend_action_discarded ppc_elf_action_discarded
10985 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10986 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10987
10988 #include "elf32-target.h"
10989
10990 /* FreeBSD Target */
10991
10992 #undef TARGET_LITTLE_SYM
10993 #undef TARGET_LITTLE_NAME
10994
10995 #undef TARGET_BIG_SYM
10996 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10997 #undef TARGET_BIG_NAME
10998 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10999
11000 #undef ELF_OSABI
11001 #define ELF_OSABI ELFOSABI_FREEBSD
11002
11003 #undef elf32_bed
11004 #define elf32_bed elf32_powerpc_fbsd_bed
11005
11006 #include "elf32-target.h"
11007
11008 /* VxWorks Target */
11009
11010 #undef TARGET_LITTLE_SYM
11011 #undef TARGET_LITTLE_NAME
11012
11013 #undef TARGET_BIG_SYM
11014 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11015 #undef TARGET_BIG_NAME
11016 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11017
11018 #undef ELF_OSABI
11019
11020 /* VxWorks uses the elf default section flags for .plt. */
11021 static const struct bfd_elf_special_section *
11022 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11023 {
11024 if (sec->name == NULL)
11025 return NULL;
11026
11027 if (strcmp (sec->name, ".plt") == 0)
11028 return _bfd_elf_get_sec_type_attr (abfd, sec);
11029
11030 return ppc_elf_get_sec_type_attr (abfd, sec);
11031 }
11032
11033 /* Like ppc_elf_link_hash_table_create, but overrides
11034 appropriately for VxWorks. */
11035 static struct bfd_link_hash_table *
11036 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11037 {
11038 struct bfd_link_hash_table *ret;
11039
11040 ret = ppc_elf_link_hash_table_create (abfd);
11041 if (ret)
11042 {
11043 struct ppc_elf_link_hash_table *htab
11044 = (struct ppc_elf_link_hash_table *)ret;
11045 htab->is_vxworks = 1;
11046 htab->plt_type = PLT_VXWORKS;
11047 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11048 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11049 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11050 }
11051 return ret;
11052 }
11053
11054 /* Tweak magic VxWorks symbols as they are loaded. */
11055 static bfd_boolean
11056 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11057 struct bfd_link_info *info,
11058 Elf_Internal_Sym *sym,
11059 const char **namep,
11060 flagword *flagsp,
11061 asection **secp,
11062 bfd_vma *valp)
11063 {
11064 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11065 valp))
11066 return FALSE;
11067
11068 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11069 }
11070
11071 static void
11072 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11073 {
11074 ppc_elf_final_write_processing (abfd, linker);
11075 elf_vxworks_final_write_processing (abfd, linker);
11076 }
11077
11078 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11079 define it. */
11080 #undef elf_backend_want_plt_sym
11081 #define elf_backend_want_plt_sym 1
11082 #undef elf_backend_want_got_plt
11083 #define elf_backend_want_got_plt 1
11084 #undef elf_backend_got_symbol_offset
11085 #define elf_backend_got_symbol_offset 0
11086 #undef elf_backend_plt_not_loaded
11087 #define elf_backend_plt_not_loaded 0
11088 #undef elf_backend_plt_readonly
11089 #define elf_backend_plt_readonly 1
11090 #undef elf_backend_got_header_size
11091 #define elf_backend_got_header_size 12
11092 #undef elf_backend_dtrel_excludes_plt
11093 #define elf_backend_dtrel_excludes_plt 1
11094
11095 #undef bfd_elf32_get_synthetic_symtab
11096
11097 #undef bfd_elf32_bfd_link_hash_table_create
11098 #define bfd_elf32_bfd_link_hash_table_create \
11099 ppc_elf_vxworks_link_hash_table_create
11100 #undef elf_backend_add_symbol_hook
11101 #define elf_backend_add_symbol_hook \
11102 ppc_elf_vxworks_add_symbol_hook
11103 #undef elf_backend_link_output_symbol_hook
11104 #define elf_backend_link_output_symbol_hook \
11105 elf_vxworks_link_output_symbol_hook
11106 #undef elf_backend_final_write_processing
11107 #define elf_backend_final_write_processing \
11108 ppc_elf_vxworks_final_write_processing
11109 #undef elf_backend_get_sec_type_attr
11110 #define elf_backend_get_sec_type_attr \
11111 ppc_elf_vxworks_get_sec_type_attr
11112 #undef elf_backend_emit_relocs
11113 #define elf_backend_emit_relocs \
11114 elf_vxworks_emit_relocs
11115
11116 #undef elf32_bed
11117 #define elf32_bed ppc_elf_vxworks_bed
11118 #undef elf_backend_post_process_headers
11119
11120 #include "elf32-target.h"
GDB Binutils - Deliverables
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