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Implement -z dynamic-undefined-weak
[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 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 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1750 HOWTO (R_PPC_16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable hierarchy. */
1765 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTINHERIT", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable member usage. */
1780 HOWTO (R_PPC_GNU_VTENTRY, /* 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_VTENTRY", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* Phony reloc to handle AIX style TOC entries. */
1795 HOWTO (R_PPC_TOC16, /* type */
1796 0, /* rightshift */
1797 1, /* size (0 = byte, 1 = short, 2 = long) */
1798 16, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_signed, /* complain_on_overflow */
1802 ppc_elf_unhandled_reloc, /* special_function */
1803 "R_PPC_TOC16", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0xffff, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808 };
1809
1810 /* External 32-bit PPC structure for PRPSINFO. This structure is
1811 ABI-defined, thus we choose to use char arrays here in order to
1812 avoid dealing with different types in different architectures.
1813
1814 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1815 most non-PPC architectures use `short int'.
1816
1817 This structure will ultimately be written in the corefile's note
1818 section, as the PRPSINFO. */
1819
1820 struct elf_external_ppc_linux_prpsinfo32
1821 {
1822 char pr_state; /* Numeric process state. */
1823 char pr_sname; /* Char for pr_state. */
1824 char pr_zomb; /* Zombie. */
1825 char pr_nice; /* Nice val. */
1826 char pr_flag[4]; /* Flags. */
1827 char pr_uid[4];
1828 char pr_gid[4];
1829 char pr_pid[4];
1830 char pr_ppid[4];
1831 char pr_pgrp[4];
1832 char pr_sid[4];
1833 char pr_fname[16]; /* Filename of executable. */
1834 char pr_psargs[80]; /* Initial part of arg list. */
1835 };
1836
1837 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1838 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1839
1840 static inline void
1841 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1842 const struct elf_internal_linux_prpsinfo *from,
1843 struct elf_external_ppc_linux_prpsinfo32 *to)
1844 {
1845 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1846 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1847 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1848 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1849 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1850 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1851 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1852 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1853 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1854 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1855 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1856 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1857 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1858 }
1859 \f
1860 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1861
1862 static void
1863 ppc_elf_howto_init (void)
1864 {
1865 unsigned int i, type;
1866
1867 for (i = 0;
1868 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1869 i++)
1870 {
1871 type = ppc_elf_howto_raw[i].type;
1872 if (type >= (sizeof (ppc_elf_howto_table)
1873 / sizeof (ppc_elf_howto_table[0])))
1874 abort ();
1875 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1876 }
1877 }
1878
1879 static reloc_howto_type *
1880 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1881 bfd_reloc_code_real_type code)
1882 {
1883 enum elf_ppc_reloc_type r;
1884
1885 /* Initialize howto table if not already done. */
1886 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1887 ppc_elf_howto_init ();
1888
1889 switch (code)
1890 {
1891 default:
1892 return NULL;
1893
1894 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1895 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1896 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1897 case BFD_RELOC_PPC64_ADDR16_DS:
1898 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1899 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1900 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1901 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1902 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1903 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1904 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1906 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1907 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1910 case BFD_RELOC_PPC64_GOT16_DS:
1911 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1912 case BFD_RELOC_PPC64_GOT16_LO_DS:
1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1915 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1916 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1917 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1918 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1919 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1920 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1921 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1922 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1923 case BFD_RELOC_PPC64_PLT16_LO_DS:
1924 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1925 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1926 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1927 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1928 case BFD_RELOC_PPC64_SECTOFF_DS:
1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1930 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1931 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1932 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1933 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1934 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1935 case BFD_RELOC_PPC64_TOC16_DS:
1936 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1937 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1938 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1939 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1940 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1941 case BFD_RELOC_PPC64_TPREL16_DS:
1942 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1943 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1944 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1945 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1946 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1947 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1948 case BFD_RELOC_PPC64_DTPREL16_DS:
1949 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1950 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1951 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1952 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1953 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1954 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1958 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1962 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1966 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1970 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1971 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1975 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1976 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1978 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1979 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1980 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1981 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1982 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1984 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1985 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1986 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1987 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1988 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1989 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1990 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1991 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1992 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1993 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1994 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1995 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1996 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1997 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1999 r = R_PPC_VLE_SDAREL_LO16A;
2000 break;
2001 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2002 r = R_PPC_VLE_SDAREL_LO16D;
2003 break;
2004 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2005 r = R_PPC_VLE_SDAREL_HI16A;
2006 break;
2007 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2008 r = R_PPC_VLE_SDAREL_HI16D;
2009 break;
2010 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2011 r = R_PPC_VLE_SDAREL_HA16A;
2012 break;
2013 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2014 r = R_PPC_VLE_SDAREL_HA16D;
2015 break;
2016 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2017 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2018 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2019 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2020 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2021 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2022 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2023 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2024 }
2025
2026 return ppc_elf_howto_table[r];
2027 };
2028
2029 static reloc_howto_type *
2030 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2031 const char *r_name)
2032 {
2033 unsigned int i;
2034
2035 for (i = 0;
2036 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2037 i++)
2038 if (ppc_elf_howto_raw[i].name != NULL
2039 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2040 return &ppc_elf_howto_raw[i];
2041
2042 return NULL;
2043 }
2044
2045 /* Set the howto pointer for a PowerPC ELF reloc. */
2046
2047 static void
2048 ppc_elf_info_to_howto (bfd *abfd,
2049 arelent *cache_ptr,
2050 Elf_Internal_Rela *dst)
2051 {
2052 unsigned int r_type;
2053
2054 /* Initialize howto table if not already done. */
2055 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2056 ppc_elf_howto_init ();
2057
2058 r_type = ELF32_R_TYPE (dst->r_info);
2059 if (r_type >= R_PPC_max)
2060 {
2061 /* xgettext:c-format */
2062 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2063 abfd, r_type);
2064 bfd_set_error (bfd_error_bad_value);
2065 r_type = R_PPC_NONE;
2066 }
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (!cache_ptr->howto)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%B: invalid relocation type %d"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2079 }
2080 }
2081
2082 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2083
2084 static bfd_reloc_status_type
2085 ppc_elf_addr16_ha_reloc (bfd *abfd,
2086 arelent *reloc_entry,
2087 asymbol *symbol,
2088 void *data,
2089 asection *input_section,
2090 bfd *output_bfd,
2091 char **error_message ATTRIBUTE_UNUSED)
2092 {
2093 enum elf_ppc_reloc_type r_type;
2094 long insn;
2095 bfd_size_type octets;
2096 bfd_vma value;
2097
2098 if (output_bfd != NULL)
2099 {
2100 reloc_entry->address += input_section->output_offset;
2101 return bfd_reloc_ok;
2102 }
2103
2104 reloc_entry->addend += 0x8000;
2105 r_type = reloc_entry->howto->type;
2106 if (r_type != R_PPC_REL16DX_HA)
2107 return bfd_reloc_continue;
2108
2109 value = 0;
2110 if (!bfd_is_com_section (symbol->section))
2111 value = symbol->value;
2112 value += (reloc_entry->addend
2113 + symbol->section->output_offset
2114 + symbol->section->output_section->vma);
2115 value -= (reloc_entry->address
2116 + input_section->output_offset
2117 + input_section->output_section->vma);
2118 value >>= 16;
2119
2120 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2121 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2122 insn &= ~0x1fffc1;
2123 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2124 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2125 return bfd_reloc_ok;
2126 }
2127
2128 static bfd_reloc_status_type
2129 ppc_elf_unhandled_reloc (bfd *abfd,
2130 arelent *reloc_entry,
2131 asymbol *symbol,
2132 void *data,
2133 asection *input_section,
2134 bfd *output_bfd,
2135 char **error_message)
2136 {
2137 /* If this is a relocatable link (output_bfd test tells us), just
2138 call the generic function. Any adjustment will be done at final
2139 link time. */
2140 if (output_bfd != NULL)
2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2142 input_section, output_bfd, error_message);
2143
2144 if (error_message != NULL)
2145 {
2146 static char buf[60];
2147 sprintf (buf, _("generic linker can't handle %s"),
2148 reloc_entry->howto->name);
2149 *error_message = buf;
2150 }
2151 return bfd_reloc_dangerous;
2152 }
2153 \f
2154 /* Sections created by the linker. */
2155
2156 typedef struct elf_linker_section
2157 {
2158 /* Pointer to the bfd section. */
2159 asection *section;
2160 /* Section name. */
2161 const char *name;
2162 /* Associated bss section name. */
2163 const char *bss_name;
2164 /* Associated symbol name. */
2165 const char *sym_name;
2166 /* Associated symbol. */
2167 struct elf_link_hash_entry *sym;
2168 } elf_linker_section_t;
2169
2170 /* Linked list of allocated pointer entries. This hangs off of the
2171 symbol lists, and provides allows us to return different pointers,
2172 based on different addend's. */
2173
2174 typedef struct elf_linker_section_pointers
2175 {
2176 /* next allocated pointer for this symbol */
2177 struct elf_linker_section_pointers *next;
2178 /* offset of pointer from beginning of section */
2179 bfd_vma offset;
2180 /* addend used */
2181 bfd_vma addend;
2182 /* which linker section this is */
2183 elf_linker_section_t *lsect;
2184 } elf_linker_section_pointers_t;
2185
2186 struct ppc_elf_obj_tdata
2187 {
2188 struct elf_obj_tdata elf;
2189
2190 /* A mapping from local symbols to offsets into the various linker
2191 sections added. This is index by the symbol index. */
2192 elf_linker_section_pointers_t **linker_section_pointers;
2193
2194 /* Flags used to auto-detect plt type. */
2195 unsigned int makes_plt_call : 1;
2196 unsigned int has_rel16 : 1;
2197 };
2198
2199 #define ppc_elf_tdata(bfd) \
2200 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2201
2202 #define elf_local_ptr_offsets(bfd) \
2203 (ppc_elf_tdata (bfd)->linker_section_pointers)
2204
2205 #define is_ppc_elf(bfd) \
2206 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2207 && elf_object_id (bfd) == PPC32_ELF_DATA)
2208
2209 /* Override the generic function because we store some extras. */
2210
2211 static bfd_boolean
2212 ppc_elf_mkobject (bfd *abfd)
2213 {
2214 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2215 PPC32_ELF_DATA);
2216 }
2217
2218 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2219
2220 bfd_boolean
2221 _bfd_elf_ppc_set_arch (bfd *abfd)
2222 {
2223 unsigned long mach = 0;
2224 asection *s;
2225 unsigned char *contents;
2226
2227 if (abfd->arch_info->bits_per_word == 32
2228 && bfd_big_endian (abfd))
2229 {
2230
2231 for (s = abfd->sections; s != NULL; s = s->next)
2232 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2233 break;
2234 if (s != NULL)
2235 mach = bfd_mach_ppc_vle;
2236 }
2237
2238 if (mach == 0)
2239 {
2240 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2241 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2242 {
2243 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2244 unsigned int i;
2245
2246 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2247 {
2248 unsigned int val = bfd_get_32 (abfd, contents + i);
2249 switch (val >> 16)
2250 {
2251 case PPC_APUINFO_PMR:
2252 case PPC_APUINFO_RFMCI:
2253 if (mach == 0)
2254 mach = bfd_mach_ppc_titan;
2255 break;
2256
2257 case PPC_APUINFO_ISEL:
2258 case PPC_APUINFO_CACHELCK:
2259 if (mach == bfd_mach_ppc_titan)
2260 mach = bfd_mach_ppc_e500mc;
2261 break;
2262
2263 case PPC_APUINFO_SPE:
2264 case PPC_APUINFO_EFS:
2265 case PPC_APUINFO_BRLOCK:
2266 if (mach != bfd_mach_ppc_vle)
2267 mach = bfd_mach_ppc_e500;
2268 break;
2269
2270 case PPC_APUINFO_VLE:
2271 mach = bfd_mach_ppc_vle;
2272 break;
2273
2274 default:
2275 mach = -1ul;
2276 }
2277 }
2278 free (contents);
2279 }
2280 }
2281
2282 if (mach != 0 && mach != -1ul)
2283 {
2284 const bfd_arch_info_type *arch;
2285
2286 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2287 if (arch->mach == mach)
2288 {
2289 abfd->arch_info = arch;
2290 break;
2291 }
2292 }
2293 return TRUE;
2294 }
2295
2296 /* Fix bad default arch selected for a 32 bit input bfd when the
2297 default is 64 bit. Also select arch based on apuinfo. */
2298
2299 static bfd_boolean
2300 ppc_elf_object_p (bfd *abfd)
2301 {
2302 if (!abfd->arch_info->the_default)
2303 return TRUE;
2304
2305 if (abfd->arch_info->bits_per_word == 64)
2306 {
2307 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2308
2309 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2310 {
2311 /* Relies on arch after 64 bit default being 32 bit default. */
2312 abfd->arch_info = abfd->arch_info->next;
2313 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2314 }
2315 }
2316 return _bfd_elf_ppc_set_arch (abfd);
2317 }
2318
2319 /* Function to set whether a module needs the -mrelocatable bit set. */
2320
2321 static bfd_boolean
2322 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2323 {
2324 BFD_ASSERT (!elf_flags_init (abfd)
2325 || elf_elfheader (abfd)->e_flags == flags);
2326
2327 elf_elfheader (abfd)->e_flags = flags;
2328 elf_flags_init (abfd) = TRUE;
2329 return TRUE;
2330 }
2331
2332 /* Support for core dump NOTE sections. */
2333
2334 static bfd_boolean
2335 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2336 {
2337 int offset;
2338 unsigned int size;
2339
2340 switch (note->descsz)
2341 {
2342 default:
2343 return FALSE;
2344
2345 case 268: /* Linux/PPC. */
2346 /* pr_cursig */
2347 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2348
2349 /* pr_pid */
2350 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2351
2352 /* pr_reg */
2353 offset = 72;
2354 size = 192;
2355
2356 break;
2357 }
2358
2359 /* Make a ".reg/999" section. */
2360 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2361 size, note->descpos + offset);
2362 }
2363
2364 static bfd_boolean
2365 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2366 {
2367 switch (note->descsz)
2368 {
2369 default:
2370 return FALSE;
2371
2372 case 128: /* Linux/PPC elf_prpsinfo. */
2373 elf_tdata (abfd)->core->pid
2374 = bfd_get_32 (abfd, note->descdata + 16);
2375 elf_tdata (abfd)->core->program
2376 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2377 elf_tdata (abfd)->core->command
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2379 }
2380
2381 /* Note that for some reason, a spurious space is tacked
2382 onto the end of the args in some (at least one anyway)
2383 implementations, so strip it off if it exists. */
2384
2385 {
2386 char *command = elf_tdata (abfd)->core->command;
2387 int n = strlen (command);
2388
2389 if (0 < n && command[n - 1] == ' ')
2390 command[n - 1] = '\0';
2391 }
2392
2393 return TRUE;
2394 }
2395
2396 char *
2397 elfcore_write_ppc_linux_prpsinfo32
2398 (bfd *abfd,
2399 char *buf,
2400 int *bufsiz,
2401 const struct elf_internal_linux_prpsinfo *prpsinfo)
2402 {
2403 struct elf_external_ppc_linux_prpsinfo32 data;
2404
2405 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2406 return elfcore_write_note (abfd, buf, bufsiz,
2407 "CORE", NT_PRPSINFO, &data, sizeof (data));
2408 }
2409
2410 static char *
2411 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2412 {
2413 switch (note_type)
2414 {
2415 default:
2416 return NULL;
2417
2418 case NT_PRPSINFO:
2419 {
2420 char data[128];
2421 va_list ap;
2422
2423 va_start (ap, note_type);
2424 memset (data, 0, sizeof (data));
2425 strncpy (data + 32, va_arg (ap, const char *), 16);
2426 strncpy (data + 48, va_arg (ap, const char *), 80);
2427 va_end (ap);
2428 return elfcore_write_note (abfd, buf, bufsiz,
2429 "CORE", note_type, data, sizeof (data));
2430 }
2431
2432 case NT_PRSTATUS:
2433 {
2434 char data[268];
2435 va_list ap;
2436 long pid;
2437 int cursig;
2438 const void *greg;
2439
2440 va_start (ap, note_type);
2441 memset (data, 0, 72);
2442 pid = va_arg (ap, long);
2443 bfd_put_32 (abfd, pid, data + 24);
2444 cursig = va_arg (ap, int);
2445 bfd_put_16 (abfd, cursig, data + 12);
2446 greg = va_arg (ap, const void *);
2447 memcpy (data + 72, greg, 192);
2448 memset (data + 264, 0, 4);
2449 va_end (ap);
2450 return elfcore_write_note (abfd, buf, bufsiz,
2451 "CORE", note_type, data, sizeof (data));
2452 }
2453 }
2454 }
2455
2456 static flagword
2457 ppc_elf_lookup_section_flags (char *flag_name)
2458 {
2459
2460 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2461 return SHF_PPC_VLE;
2462
2463 return 0;
2464 }
2465
2466 /* Return address for Ith PLT stub in section PLT, for relocation REL
2467 or (bfd_vma) -1 if it should not be included. */
2468
2469 static bfd_vma
2470 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2471 const asection *plt ATTRIBUTE_UNUSED,
2472 const arelent *rel)
2473 {
2474 return rel->address;
2475 }
2476
2477 /* Handle a PowerPC specific section when reading an object file. This
2478 is called when bfd_section_from_shdr finds a section with an unknown
2479 type. */
2480
2481 static bfd_boolean
2482 ppc_elf_section_from_shdr (bfd *abfd,
2483 Elf_Internal_Shdr *hdr,
2484 const char *name,
2485 int shindex)
2486 {
2487 asection *newsect;
2488 flagword flags;
2489
2490 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2491 return FALSE;
2492
2493 newsect = hdr->bfd_section;
2494 flags = bfd_get_section_flags (abfd, newsect);
2495 if (hdr->sh_flags & SHF_EXCLUDE)
2496 flags |= SEC_EXCLUDE;
2497
2498 if (hdr->sh_type == SHT_ORDERED)
2499 flags |= SEC_SORT_ENTRIES;
2500
2501 bfd_set_section_flags (abfd, newsect, flags);
2502 return TRUE;
2503 }
2504
2505 /* Set up any other section flags and such that may be necessary. */
2506
2507 static bfd_boolean
2508 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2509 Elf_Internal_Shdr *shdr,
2510 asection *asect)
2511 {
2512 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2513 shdr->sh_type = SHT_ORDERED;
2514
2515 return TRUE;
2516 }
2517
2518 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2519 need to bump up the number of section headers. */
2520
2521 static int
2522 ppc_elf_additional_program_headers (bfd *abfd,
2523 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2524 {
2525 asection *s;
2526 int ret = 0;
2527
2528 s = bfd_get_section_by_name (abfd, ".sbss2");
2529 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2530 ++ret;
2531
2532 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2533 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2534 ++ret;
2535
2536 return ret;
2537 }
2538
2539 /* Modify the segment map for VLE executables. */
2540
2541 bfd_boolean
2542 ppc_elf_modify_segment_map (bfd *abfd,
2543 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2544 {
2545 struct elf_segment_map *m;
2546
2547 /* At this point in the link, output sections have already been sorted by
2548 LMA and assigned to segments. All that is left to do is to ensure
2549 there is no mixing of VLE & non-VLE sections in a text segment.
2550 If we find that case, we split the segment.
2551 We maintain the original output section order. */
2552
2553 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2554 {
2555 struct elf_segment_map *n;
2556 bfd_size_type amt;
2557 unsigned int j, k;
2558 unsigned int p_flags;
2559
2560 if (m->p_type != PT_LOAD || m->count == 0)
2561 continue;
2562
2563 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2564 {
2565 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2566 p_flags |= PF_W;
2567 if ((m->sections[j]->flags & SEC_CODE) != 0)
2568 {
2569 p_flags |= PF_X;
2570 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2571 p_flags |= PF_PPC_VLE;
2572 break;
2573 }
2574 }
2575 if (j != m->count)
2576 while (++j != m->count)
2577 {
2578 unsigned int p_flags1 = PF_R;
2579
2580 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2581 p_flags1 |= PF_W;
2582 if ((m->sections[j]->flags & SEC_CODE) != 0)
2583 {
2584 p_flags1 |= PF_X;
2585 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2586 p_flags1 |= PF_PPC_VLE;
2587 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2588 break;
2589 }
2590 p_flags |= p_flags1;
2591 }
2592 /* If we're splitting a segment which originally contained rw
2593 sections then those sections might now only be in one of the
2594 two parts. So always set p_flags if splitting, even if we
2595 are being called for objcopy with p_flags_valid set. */
2596 if (j != m->count || !m->p_flags_valid)
2597 {
2598 m->p_flags_valid = 1;
2599 m->p_flags = p_flags;
2600 }
2601 if (j == m->count)
2602 continue;
2603
2604 /* Sections 0..j-1 stay in this (current) segment,
2605 the remainder are put in a new segment.
2606 The scan resumes with the new segment. */
2607
2608 amt = sizeof (struct elf_segment_map);
2609 amt += (m->count - j - 1) * sizeof (asection *);
2610 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2611 if (n == NULL)
2612 return FALSE;
2613
2614 n->p_type = PT_LOAD;
2615 n->count = m->count - j;
2616 for (k = 0; k < n->count; ++k)
2617 n->sections[k] = m->sections[j + k];
2618 m->count = j;
2619 m->p_size_valid = 0;
2620 n->next = m->next;
2621 m->next = n;
2622 }
2623
2624 return TRUE;
2625 }
2626
2627 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2628 .PPC.EMB.sbss0 a normal section, and not a bss section so
2629 that the linker doesn't crater when trying to make more than
2630 2 sections. */
2631
2632 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2633 {
2634 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2635 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2636 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2637 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2638 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2640 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2641 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2642 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2643 { NULL, 0, 0, 0, 0 }
2644 };
2645
2646 /* This is what we want for new plt/got. */
2647 static struct bfd_elf_special_section ppc_alt_plt =
2648 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2649
2650 static const struct bfd_elf_special_section *
2651 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2652 {
2653 const struct bfd_elf_special_section *ssect;
2654
2655 /* See if this is one of the special sections. */
2656 if (sec->name == NULL)
2657 return NULL;
2658
2659 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2660 sec->use_rela_p);
2661 if (ssect != NULL)
2662 {
2663 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2664 ssect = &ppc_alt_plt;
2665 return ssect;
2666 }
2667
2668 return _bfd_elf_get_sec_type_attr (abfd, sec);
2669 }
2670 \f
2671 /* Very simple linked list structure for recording apuinfo values. */
2672 typedef struct apuinfo_list
2673 {
2674 struct apuinfo_list *next;
2675 unsigned long value;
2676 }
2677 apuinfo_list;
2678
2679 static apuinfo_list *head;
2680 static bfd_boolean apuinfo_set;
2681
2682 static void
2683 apuinfo_list_init (void)
2684 {
2685 head = NULL;
2686 apuinfo_set = FALSE;
2687 }
2688
2689 static void
2690 apuinfo_list_add (unsigned long value)
2691 {
2692 apuinfo_list *entry = head;
2693
2694 while (entry != NULL)
2695 {
2696 if (entry->value == value)
2697 return;
2698 entry = entry->next;
2699 }
2700
2701 entry = bfd_malloc (sizeof (* entry));
2702 if (entry == NULL)
2703 return;
2704
2705 entry->value = value;
2706 entry->next = head;
2707 head = entry;
2708 }
2709
2710 static unsigned
2711 apuinfo_list_length (void)
2712 {
2713 apuinfo_list *entry;
2714 unsigned long count;
2715
2716 for (entry = head, count = 0;
2717 entry;
2718 entry = entry->next)
2719 ++ count;
2720
2721 return count;
2722 }
2723
2724 static inline unsigned long
2725 apuinfo_list_element (unsigned long number)
2726 {
2727 apuinfo_list * entry;
2728
2729 for (entry = head;
2730 entry && number --;
2731 entry = entry->next)
2732 ;
2733
2734 return entry ? entry->value : 0;
2735 }
2736
2737 static void
2738 apuinfo_list_finish (void)
2739 {
2740 apuinfo_list *entry;
2741
2742 for (entry = head; entry;)
2743 {
2744 apuinfo_list *next = entry->next;
2745 free (entry);
2746 entry = next;
2747 }
2748
2749 head = NULL;
2750 }
2751
2752 /* Scan the input BFDs and create a linked list of
2753 the APUinfo values that will need to be emitted. */
2754
2755 static void
2756 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2757 {
2758 bfd *ibfd;
2759 asection *asec;
2760 char *buffer = NULL;
2761 bfd_size_type largest_input_size = 0;
2762 unsigned i;
2763 unsigned long length;
2764 const char *error_message = NULL;
2765
2766 if (link_info == NULL)
2767 return;
2768
2769 apuinfo_list_init ();
2770
2771 /* Read in the input sections contents. */
2772 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2773 {
2774 unsigned long datum;
2775
2776 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2777 if (asec == NULL)
2778 continue;
2779
2780 /* xgettext:c-format */
2781 error_message = _("corrupt %s section in %B");
2782 length = asec->size;
2783 if (length < 20)
2784 goto fail;
2785
2786 apuinfo_set = TRUE;
2787 if (largest_input_size < asec->size)
2788 {
2789 if (buffer)
2790 free (buffer);
2791 largest_input_size = asec->size;
2792 buffer = bfd_malloc (largest_input_size);
2793 if (!buffer)
2794 return;
2795 }
2796
2797 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2798 || (bfd_bread (buffer, length, ibfd) != length))
2799 {
2800 /* xgettext:c-format */
2801 error_message = _("unable to read in %s section from %B");
2802 goto fail;
2803 }
2804
2805 /* Verify the contents of the header. Note - we have to
2806 extract the values this way in order to allow for a
2807 host whose endian-ness is different from the target. */
2808 datum = bfd_get_32 (ibfd, buffer);
2809 if (datum != sizeof APUINFO_LABEL)
2810 goto fail;
2811
2812 datum = bfd_get_32 (ibfd, buffer + 8);
2813 if (datum != 0x2)
2814 goto fail;
2815
2816 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2817 goto fail;
2818
2819 /* Get the number of bytes used for apuinfo entries. */
2820 datum = bfd_get_32 (ibfd, buffer + 4);
2821 if (datum + 20 != length)
2822 goto fail;
2823
2824 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2825 for (i = 0; i < datum; i += 4)
2826 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2827 }
2828
2829 error_message = NULL;
2830
2831 if (apuinfo_set)
2832 {
2833 /* Compute the size of the output section. */
2834 unsigned num_entries = apuinfo_list_length ();
2835
2836 /* Set the output section size, if it exists. */
2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2838
2839 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2840 {
2841 ibfd = abfd;
2842 /* xgettext:c-format */
2843 error_message = _("warning: unable to set size of %s section in %B");
2844 }
2845 }
2846
2847 fail:
2848 if (buffer)
2849 free (buffer);
2850
2851 if (error_message)
2852 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2853 }
2854
2855 /* Prevent the output section from accumulating the input sections'
2856 contents. We have already stored this in our linked list structure. */
2857
2858 static bfd_boolean
2859 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2860 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2861 asection *asec,
2862 bfd_byte *contents ATTRIBUTE_UNUSED)
2863 {
2864 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2865 }
2866
2867 /* Finally we can generate the output section. */
2868
2869 static void
2870 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2871 {
2872 bfd_byte *buffer;
2873 asection *asec;
2874 unsigned i;
2875 unsigned num_entries;
2876 bfd_size_type length;
2877
2878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2879 if (asec == NULL)
2880 return;
2881
2882 if (!apuinfo_set)
2883 return;
2884
2885 length = asec->size;
2886 if (length < 20)
2887 return;
2888
2889 buffer = bfd_malloc (length);
2890 if (buffer == NULL)
2891 {
2892 _bfd_error_handler
2893 (_("failed to allocate space for new APUinfo section."));
2894 return;
2895 }
2896
2897 /* Create the apuinfo header. */
2898 num_entries = apuinfo_list_length ();
2899 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2900 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2901 bfd_put_32 (abfd, 0x2, buffer + 8);
2902 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2903
2904 length = 20;
2905 for (i = 0; i < num_entries; i++)
2906 {
2907 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2908 length += 4;
2909 }
2910
2911 if (length != asec->size)
2912 _bfd_error_handler (_("failed to compute new APUinfo section."));
2913
2914 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2915 _bfd_error_handler (_("failed to install new APUinfo section."));
2916
2917 free (buffer);
2918
2919 apuinfo_list_finish ();
2920 }
2921 \f
2922 static bfd_boolean
2923 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2924 {
2925 bfd_byte buf[GLINK_ENTRY_SIZE];
2926
2927 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2928 return FALSE;
2929
2930 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2931 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2932 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2933 && bfd_get_32 (abfd, buf + 12) == BCTR);
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 static long
2946 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2947 long dynsymcount, asymbol **dynsyms,
2948 asymbol **ret)
2949 {
2950 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2951 asection *plt, *relplt, *dynamic, *glink;
2952 bfd_vma glink_vma = 0;
2953 bfd_vma resolv_vma = 0;
2954 bfd_vma stub_vma;
2955 asymbol *s;
2956 arelent *p;
2957 long count, i;
2958 size_t size;
2959 char *names;
2960 bfd_byte buf[4];
2961
2962 *ret = NULL;
2963
2964 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2965 return 0;
2966
2967 if (dynsymcount <= 0)
2968 return 0;
2969
2970 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2971 if (relplt == NULL)
2972 return 0;
2973
2974 plt = bfd_get_section_by_name (abfd, ".plt");
2975 if (plt == NULL)
2976 return 0;
2977
2978 /* Call common code to handle old-style executable PLTs. */
2979 if (elf_section_flags (plt) & SHF_EXECINSTR)
2980 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2981 dynsymcount, dynsyms, ret);
2982
2983 /* If this object was prelinked, the prelinker stored the address
2984 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2985 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2986 if (dynamic != NULL)
2987 {
2988 bfd_byte *dynbuf, *extdyn, *extdynend;
2989 size_t extdynsize;
2990 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2991
2992 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2993 return -1;
2994
2995 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2996 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2997
2998 extdyn = dynbuf;
2999 extdynend = extdyn + dynamic->size;
3000 for (; extdyn < extdynend; extdyn += extdynsize)
3001 {
3002 Elf_Internal_Dyn dyn;
3003 (*swap_dyn_in) (abfd, extdyn, &dyn);
3004
3005 if (dyn.d_tag == DT_NULL)
3006 break;
3007
3008 if (dyn.d_tag == DT_PPC_GOT)
3009 {
3010 unsigned int g_o_t = dyn.d_un.d_val;
3011 asection *got = bfd_get_section_by_name (abfd, ".got");
3012 if (got != NULL
3013 && bfd_get_section_contents (abfd, got, buf,
3014 g_o_t - got->vma + 4, 4))
3015 glink_vma = bfd_get_32 (abfd, buf);
3016 break;
3017 }
3018 }
3019 free (dynbuf);
3020 }
3021
3022 /* Otherwise we read the first plt entry. */
3023 if (glink_vma == 0)
3024 {
3025 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3026 glink_vma = bfd_get_32 (abfd, buf);
3027 }
3028
3029 if (glink_vma == 0)
3030 return 0;
3031
3032 /* The .glink section usually does not survive the final
3033 link; search for the section (usually .text) where the
3034 glink stubs now reside. */
3035 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3036 if (glink == NULL)
3037 return 0;
3038
3039 /* Determine glink PLT resolver by reading the relative branch
3040 from the first glink stub. */
3041 if (bfd_get_section_contents (abfd, glink, buf,
3042 glink_vma - glink->vma, 4))
3043 {
3044 unsigned int insn = bfd_get_32 (abfd, buf);
3045
3046 /* The first glink stub may either branch to the resolver ... */
3047 insn ^= B;
3048 if ((insn & ~0x3fffffc) == 0)
3049 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3050
3051 /* ... or fall through a bunch of NOPs. */
3052 else if ((insn ^ B ^ NOP) == 0)
3053 for (i = 4;
3054 bfd_get_section_contents (abfd, glink, buf,
3055 glink_vma - glink->vma + i, 4);
3056 i += 4)
3057 if (bfd_get_32 (abfd, buf) != NOP)
3058 {
3059 resolv_vma = glink_vma + i;
3060 break;
3061 }
3062 }
3063
3064 count = relplt->size / sizeof (Elf32_External_Rela);
3065 /* If the stubs are those for -shared/-pie then we might have
3066 multiple stubs for each plt entry. If that is the case then
3067 there is no way to associate stubs with their plt entries short
3068 of figuring out the GOT pointer value used in the stub. */
3069 if (!is_nonpic_glink_stub (abfd, glink,
3070 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3071 return 0;
3072
3073 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3074 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3075 return -1;
3076
3077 size = count * sizeof (asymbol);
3078 p = relplt->relocation;
3079 for (i = 0; i < count; i++, p++)
3080 {
3081 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3082 if (p->addend != 0)
3083 size += sizeof ("+0x") - 1 + 8;
3084 }
3085
3086 size += sizeof (asymbol) + sizeof ("__glink");
3087
3088 if (resolv_vma)
3089 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3090
3091 s = *ret = bfd_malloc (size);
3092 if (s == NULL)
3093 return -1;
3094
3095 stub_vma = glink_vma;
3096 names = (char *) (s + count + 1 + (resolv_vma != 0));
3097 p = relplt->relocation + count - 1;
3098 for (i = 0; i < count; i++)
3099 {
3100 size_t len;
3101
3102 *s = **p->sym_ptr_ptr;
3103 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3104 we are defining a symbol, ensure one of them is set. */
3105 if ((s->flags & BSF_LOCAL) == 0)
3106 s->flags |= BSF_GLOBAL;
3107 s->flags |= BSF_SYNTHETIC;
3108 s->section = glink;
3109 stub_vma -= 16;
3110 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3111 stub_vma -= 32;
3112 s->value = stub_vma - glink->vma;
3113 s->name = names;
3114 s->udata.p = NULL;
3115 len = strlen ((*p->sym_ptr_ptr)->name);
3116 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3117 names += len;
3118 if (p->addend != 0)
3119 {
3120 memcpy (names, "+0x", sizeof ("+0x") - 1);
3121 names += sizeof ("+0x") - 1;
3122 bfd_sprintf_vma (abfd, names, p->addend);
3123 names += strlen (names);
3124 }
3125 memcpy (names, "@plt", sizeof ("@plt"));
3126 names += sizeof ("@plt");
3127 ++s;
3128 --p;
3129 }
3130
3131 /* Add a symbol at the start of the glink branch table. */
3132 memset (s, 0, sizeof *s);
3133 s->the_bfd = abfd;
3134 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3135 s->section = glink;
3136 s->value = glink_vma - glink->vma;
3137 s->name = names;
3138 memcpy (names, "__glink", sizeof ("__glink"));
3139 names += sizeof ("__glink");
3140 s++;
3141 count++;
3142
3143 if (resolv_vma)
3144 {
3145 /* Add a symbol for the glink PLT resolver. */
3146 memset (s, 0, sizeof *s);
3147 s->the_bfd = abfd;
3148 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3149 s->section = glink;
3150 s->value = resolv_vma - glink->vma;
3151 s->name = names;
3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3153 names += sizeof ("__glink_PLTresolve");
3154 s++;
3155 count++;
3156 }
3157
3158 return count;
3159 }
3160 \f
3161 /* The following functions are specific to the ELF linker, while
3162 functions above are used generally. They appear in this file more
3163 or less in the order in which they are called. eg.
3164 ppc_elf_check_relocs is called early in the link process,
3165 ppc_elf_finish_dynamic_sections is one of the last functions
3166 called. */
3167
3168 /* Track PLT entries needed for a given symbol. We might need more
3169 than one glink entry per symbol when generating a pic binary. */
3170 struct plt_entry
3171 {
3172 struct plt_entry *next;
3173
3174 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3175 This field stores the offset into .got2 used to initialise the
3176 GOT pointer reg. It will always be at least 32768. (Current
3177 gcc always uses an offset of 32768, but ld -r will pack .got2
3178 sections together resulting in larger offsets). */
3179 bfd_vma addend;
3180
3181 /* The .got2 section. */
3182 asection *sec;
3183
3184 /* PLT refcount or offset. */
3185 union
3186 {
3187 bfd_signed_vma refcount;
3188 bfd_vma offset;
3189 } plt;
3190
3191 /* .glink stub offset. */
3192 bfd_vma glink_offset;
3193 };
3194
3195 /* Of those relocs that might be copied as dynamic relocs, this function
3196 selects those that must be copied when linking a shared library,
3197 even when the symbol is local. */
3198
3199 static int
3200 must_be_dyn_reloc (struct bfd_link_info *info,
3201 enum elf_ppc_reloc_type r_type)
3202 {
3203 switch (r_type)
3204 {
3205 default:
3206 return 1;
3207
3208 case R_PPC_REL24:
3209 case R_PPC_REL14:
3210 case R_PPC_REL14_BRTAKEN:
3211 case R_PPC_REL14_BRNTAKEN:
3212 case R_PPC_REL32:
3213 return 0;
3214
3215 case R_PPC_TPREL32:
3216 case R_PPC_TPREL16:
3217 case R_PPC_TPREL16_LO:
3218 case R_PPC_TPREL16_HI:
3219 case R_PPC_TPREL16_HA:
3220 return !bfd_link_executable (info);
3221 }
3222 }
3223
3224 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3225 copying dynamic variables from a shared lib into an app's dynbss
3226 section, and instead use a dynamic relocation to point into the
3227 shared lib. */
3228 #define ELIMINATE_COPY_RELOCS 1
3229
3230 /* Used to track dynamic relocations for local symbols. */
3231 struct ppc_dyn_relocs
3232 {
3233 struct ppc_dyn_relocs *next;
3234
3235 /* The input section of the reloc. */
3236 asection *sec;
3237
3238 /* Total number of relocs copied for the input section. */
3239 unsigned int count : 31;
3240
3241 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3242 unsigned int ifunc : 1;
3243 };
3244
3245 /* PPC ELF linker hash entry. */
3246
3247 struct ppc_elf_link_hash_entry
3248 {
3249 struct elf_link_hash_entry elf;
3250
3251 /* If this symbol is used in the linker created sections, the processor
3252 specific backend uses this field to map the field into the offset
3253 from the beginning of the section. */
3254 elf_linker_section_pointers_t *linker_section_pointer;
3255
3256 /* Track dynamic relocs copied for this symbol. */
3257 struct elf_dyn_relocs *dyn_relocs;
3258
3259 /* Contexts in which symbol is used in the GOT (or TOC).
3260 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3261 corresponding relocs are encountered during check_relocs.
3262 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3263 indicate the corresponding GOT entry type is not needed. */
3264 #define TLS_GD 1 /* GD reloc. */
3265 #define TLS_LD 2 /* LD reloc. */
3266 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3267 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3268 #define TLS_TLS 16 /* Any TLS reloc. */
3269 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3270 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3271 char tls_mask;
3272
3273 /* Nonzero if we have seen a small data relocation referring to this
3274 symbol. */
3275 unsigned char has_sda_refs : 1;
3276
3277 /* Flag use of given relocations. */
3278 unsigned char has_addr16_ha : 1;
3279 unsigned char has_addr16_lo : 1;
3280 };
3281
3282 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3283
3284 /* PPC ELF linker hash table. */
3285
3286 struct ppc_elf_link_hash_table
3287 {
3288 struct elf_link_hash_table elf;
3289
3290 /* Various options passed from the linker. */
3291 struct ppc_elf_params *params;
3292
3293 /* Short-cuts to get to dynamic linker sections. */
3294 asection *glink;
3295 asection *dynsbss;
3296 asection *relsbss;
3297 elf_linker_section_t sdata[2];
3298 asection *sbss;
3299 asection *glink_eh_frame;
3300
3301 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3302 asection *srelplt2;
3303
3304 /* Shortcut to __tls_get_addr. */
3305 struct elf_link_hash_entry *tls_get_addr;
3306
3307 /* The bfd that forced an old-style PLT. */
3308 bfd *old_bfd;
3309
3310 /* TLS local dynamic got entry handling. */
3311 union {
3312 bfd_signed_vma refcount;
3313 bfd_vma offset;
3314 } tlsld_got;
3315
3316 /* Offset of branch table to PltResolve function in glink. */
3317 bfd_vma glink_pltresolve;
3318
3319 /* Size of reserved GOT entries. */
3320 unsigned int got_header_size;
3321 /* Non-zero if allocating the header left a gap. */
3322 unsigned int got_gap;
3323
3324 /* The type of PLT we have chosen to use. */
3325 enum ppc_elf_plt_type plt_type;
3326
3327 /* True if the target system is VxWorks. */
3328 unsigned int is_vxworks:1;
3329
3330 /* Whether there exist local gnu indirect function resolvers,
3331 referenced by dynamic relocations. */
3332 unsigned int local_ifunc_resolver:1;
3333 unsigned int maybe_local_ifunc_resolver:1;
3334
3335 /* The size of PLT entries. */
3336 int plt_entry_size;
3337 /* The distance between adjacent PLT slots. */
3338 int plt_slot_size;
3339 /* The size of the first PLT entry. */
3340 int plt_initial_entry_size;
3341
3342 /* Small local sym cache. */
3343 struct sym_cache sym_cache;
3344 };
3345
3346 /* Rename some of the generic section flags to better document how they
3347 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3348
3349 /* Nonzero if this section has TLS related relocations. */
3350 #define has_tls_reloc sec_flg0
3351
3352 /* Nonzero if this section has a call to __tls_get_addr. */
3353 #define has_tls_get_addr_call sec_flg1
3354
3355 /* Get the PPC ELF linker hash table from a link_info structure. */
3356
3357 #define ppc_elf_hash_table(p) \
3358 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3359 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3360
3361 /* Create an entry in a PPC ELF linker hash table. */
3362
3363 static struct bfd_hash_entry *
3364 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3365 struct bfd_hash_table *table,
3366 const char *string)
3367 {
3368 /* Allocate the structure if it has not already been allocated by a
3369 subclass. */
3370 if (entry == NULL)
3371 {
3372 entry = bfd_hash_allocate (table,
3373 sizeof (struct ppc_elf_link_hash_entry));
3374 if (entry == NULL)
3375 return entry;
3376 }
3377
3378 /* Call the allocation method of the superclass. */
3379 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3380 if (entry != NULL)
3381 {
3382 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3383 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3384 ppc_elf_hash_entry (entry)->tls_mask = 0;
3385 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3386 }
3387
3388 return entry;
3389 }
3390
3391 /* Create a PPC ELF linker hash table. */
3392
3393 static struct bfd_link_hash_table *
3394 ppc_elf_link_hash_table_create (bfd *abfd)
3395 {
3396 struct ppc_elf_link_hash_table *ret;
3397 static struct ppc_elf_params default_params
3398 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3399
3400 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3401 if (ret == NULL)
3402 return NULL;
3403
3404 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3405 ppc_elf_link_hash_newfunc,
3406 sizeof (struct ppc_elf_link_hash_entry),
3407 PPC32_ELF_DATA))
3408 {
3409 free (ret);
3410 return NULL;
3411 }
3412
3413 ret->elf.init_plt_refcount.refcount = 0;
3414 ret->elf.init_plt_refcount.glist = NULL;
3415 ret->elf.init_plt_offset.offset = 0;
3416 ret->elf.init_plt_offset.glist = NULL;
3417
3418 ret->params = &default_params;
3419
3420 ret->sdata[0].name = ".sdata";
3421 ret->sdata[0].sym_name = "_SDA_BASE_";
3422 ret->sdata[0].bss_name = ".sbss";
3423
3424 ret->sdata[1].name = ".sdata2";
3425 ret->sdata[1].sym_name = "_SDA2_BASE_";
3426 ret->sdata[1].bss_name = ".sbss2";
3427
3428 ret->plt_entry_size = 12;
3429 ret->plt_slot_size = 8;
3430 ret->plt_initial_entry_size = 72;
3431
3432 return &ret->elf.root;
3433 }
3434
3435 /* Hook linker params into hash table. */
3436
3437 void
3438 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3439 {
3440 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3441
3442 if (htab)
3443 htab->params = params;
3444 params->pagesize_p2 = bfd_log2 (params->pagesize);
3445 }
3446
3447 /* Create .got and the related sections. */
3448
3449 static bfd_boolean
3450 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3451 {
3452 struct ppc_elf_link_hash_table *htab;
3453
3454 if (!_bfd_elf_create_got_section (abfd, info))
3455 return FALSE;
3456
3457 htab = ppc_elf_hash_table (info);
3458 if (!htab->is_vxworks)
3459 {
3460 /* The powerpc .got has a blrl instruction in it. Mark it
3461 executable. */
3462 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3463 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3464 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3465 return FALSE;
3466 }
3467
3468 return TRUE;
3469 }
3470
3471 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3472 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3473 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3474
3475 static bfd_boolean
3476 ppc_elf_create_linker_section (bfd *abfd,
3477 struct bfd_link_info *info,
3478 flagword flags,
3479 elf_linker_section_t *lsect)
3480 {
3481 asection *s;
3482
3483 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3484 | SEC_LINKER_CREATED);
3485
3486 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3487 if (s == NULL)
3488 return FALSE;
3489 lsect->section = s;
3490
3491 /* Define the sym on the first section of this name. */
3492 s = bfd_get_section_by_name (abfd, lsect->name);
3493
3494 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3495 if (lsect->sym == NULL)
3496 return FALSE;
3497 lsect->sym->root.u.def.value = 0x8000;
3498 return TRUE;
3499 }
3500
3501 static bfd_boolean
3502 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3503 {
3504 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3505 asection *s;
3506 flagword flags;
3507
3508 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3509 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3510 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3511 htab->glink = s;
3512 if (s == NULL
3513 || !bfd_set_section_alignment (abfd, s,
3514 htab->params->ppc476_workaround ? 6 : 4))
3515 return FALSE;
3516
3517 if (!info->no_ld_generated_unwind_info)
3518 {
3519 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3520 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3521 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3522 htab->glink_eh_frame = s;
3523 if (s == NULL
3524 || !bfd_set_section_alignment (abfd, s, 2))
3525 return FALSE;
3526 }
3527
3528 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3529 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3530 htab->elf.iplt = s;
3531 if (s == NULL
3532 || !bfd_set_section_alignment (abfd, s, 4))
3533 return FALSE;
3534
3535 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3536 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3537 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3538 htab->elf.irelplt = s;
3539 if (s == NULL
3540 || ! bfd_set_section_alignment (abfd, s, 2))
3541 return FALSE;
3542
3543 if (!ppc_elf_create_linker_section (abfd, info, 0,
3544 &htab->sdata[0]))
3545 return FALSE;
3546
3547 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3548 &htab->sdata[1]))
3549 return FALSE;
3550
3551 return TRUE;
3552 }
3553
3554 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3555 to output sections (just like _bfd_elf_create_dynamic_sections has
3556 to create .dynbss and .rela.bss). */
3557
3558 static bfd_boolean
3559 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3560 {
3561 struct ppc_elf_link_hash_table *htab;
3562 asection *s;
3563 flagword flags;
3564
3565 htab = ppc_elf_hash_table (info);
3566
3567 if (htab->elf.sgot == NULL
3568 && !ppc_elf_create_got (abfd, info))
3569 return FALSE;
3570
3571 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3572 return FALSE;
3573
3574 if (htab->glink == NULL
3575 && !ppc_elf_create_glink (abfd, info))
3576 return FALSE;
3577
3578 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3579 SEC_ALLOC | SEC_LINKER_CREATED);
3580 htab->dynsbss = s;
3581 if (s == NULL)
3582 return FALSE;
3583
3584 if (! bfd_link_pic (info))
3585 {
3586 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3587 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3588 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3589 htab->relsbss = s;
3590 if (s == NULL
3591 || ! bfd_set_section_alignment (abfd, s, 2))
3592 return FALSE;
3593 }
3594
3595 if (htab->is_vxworks
3596 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3597 return FALSE;
3598
3599 s = htab->elf.splt;
3600 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3601 if (htab->plt_type == PLT_VXWORKS)
3602 /* The VxWorks PLT is a loaded section with contents. */
3603 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3604 return bfd_set_section_flags (abfd, s, flags);
3605 }
3606
3607 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3608
3609 static void
3610 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3611 struct elf_link_hash_entry *dir,
3612 struct elf_link_hash_entry *ind)
3613 {
3614 struct ppc_elf_link_hash_entry *edir, *eind;
3615
3616 edir = (struct ppc_elf_link_hash_entry *) dir;
3617 eind = (struct ppc_elf_link_hash_entry *) ind;
3618
3619 edir->tls_mask |= eind->tls_mask;
3620 edir->has_sda_refs |= eind->has_sda_refs;
3621
3622 /* If called to transfer flags for a weakdef during processing
3623 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3624 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3625 if (!(ELIMINATE_COPY_RELOCS
3626 && eind->elf.root.type != bfd_link_hash_indirect
3627 && edir->elf.dynamic_adjusted))
3628 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3629
3630 if (edir->elf.versioned != versioned_hidden)
3631 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3632 edir->elf.ref_regular |= eind->elf.ref_regular;
3633 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3634 edir->elf.needs_plt |= eind->elf.needs_plt;
3635 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3636
3637 if (eind->dyn_relocs != NULL)
3638 {
3639 if (edir->dyn_relocs != NULL)
3640 {
3641 struct elf_dyn_relocs **pp;
3642 struct elf_dyn_relocs *p;
3643
3644 /* Add reloc counts against the indirect sym to the direct sym
3645 list. Merge any entries against the same section. */
3646 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3647 {
3648 struct elf_dyn_relocs *q;
3649
3650 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3651 if (q->sec == p->sec)
3652 {
3653 q->pc_count += p->pc_count;
3654 q->count += p->count;
3655 *pp = p->next;
3656 break;
3657 }
3658 if (q == NULL)
3659 pp = &p->next;
3660 }
3661 *pp = edir->dyn_relocs;
3662 }
3663
3664 edir->dyn_relocs = eind->dyn_relocs;
3665 eind->dyn_relocs = NULL;
3666 }
3667
3668 /* If we were called to copy over info for a weak sym, that's all.
3669 You might think dyn_relocs need not be copied over; After all,
3670 both syms will be dynamic or both non-dynamic so we're just
3671 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3672 code in ppc_elf_adjust_dynamic_symbol needs to check for
3673 dyn_relocs in read-only sections, and it does so on what is the
3674 DIR sym here. */
3675 if (eind->elf.root.type != bfd_link_hash_indirect)
3676 return;
3677
3678 /* Copy over the GOT refcount entries that we may have already seen to
3679 the symbol which just became indirect. */
3680 edir->elf.got.refcount += eind->elf.got.refcount;
3681 eind->elf.got.refcount = 0;
3682
3683 /* And plt entries. */
3684 if (eind->elf.plt.plist != NULL)
3685 {
3686 if (edir->elf.plt.plist != NULL)
3687 {
3688 struct plt_entry **entp;
3689 struct plt_entry *ent;
3690
3691 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3692 {
3693 struct plt_entry *dent;
3694
3695 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3696 if (dent->sec == ent->sec && dent->addend == ent->addend)
3697 {
3698 dent->plt.refcount += ent->plt.refcount;
3699 *entp = ent->next;
3700 break;
3701 }
3702 if (dent == NULL)
3703 entp = &ent->next;
3704 }
3705 *entp = edir->elf.plt.plist;
3706 }
3707
3708 edir->elf.plt.plist = eind->elf.plt.plist;
3709 eind->elf.plt.plist = NULL;
3710 }
3711
3712 if (eind->elf.dynindx != -1)
3713 {
3714 if (edir->elf.dynindx != -1)
3715 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3716 edir->elf.dynstr_index);
3717 edir->elf.dynindx = eind->elf.dynindx;
3718 edir->elf.dynstr_index = eind->elf.dynstr_index;
3719 eind->elf.dynindx = -1;
3720 eind->elf.dynstr_index = 0;
3721 }
3722 }
3723
3724 /* Hook called by the linker routine which adds symbols from an object
3725 file. We use it to put .comm items in .sbss, and not .bss. */
3726
3727 static bfd_boolean
3728 ppc_elf_add_symbol_hook (bfd *abfd,
3729 struct bfd_link_info *info,
3730 Elf_Internal_Sym *sym,
3731 const char **namep ATTRIBUTE_UNUSED,
3732 flagword *flagsp ATTRIBUTE_UNUSED,
3733 asection **secp,
3734 bfd_vma *valp)
3735 {
3736 if (sym->st_shndx == SHN_COMMON
3737 && !bfd_link_relocatable (info)
3738 && is_ppc_elf (info->output_bfd)
3739 && sym->st_size <= elf_gp_size (abfd))
3740 {
3741 /* Common symbols less than or equal to -G nn bytes are automatically
3742 put into .sbss. */
3743 struct ppc_elf_link_hash_table *htab;
3744
3745 htab = ppc_elf_hash_table (info);
3746 if (htab->sbss == NULL)
3747 {
3748 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3749
3750 if (!htab->elf.dynobj)
3751 htab->elf.dynobj = abfd;
3752
3753 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3754 ".sbss",
3755 flags);
3756 if (htab->sbss == NULL)
3757 return FALSE;
3758 }
3759
3760 *secp = htab->sbss;
3761 *valp = sym->st_size;
3762 }
3763
3764 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3765 && (abfd->flags & DYNAMIC) == 0
3766 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3767 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3768
3769 return TRUE;
3770 }
3771 \f
3772 /* Find a linker generated pointer with a given addend and type. */
3773
3774 static elf_linker_section_pointers_t *
3775 elf_find_pointer_linker_section
3776 (elf_linker_section_pointers_t *linker_pointers,
3777 bfd_vma addend,
3778 elf_linker_section_t *lsect)
3779 {
3780 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3781 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3782 return linker_pointers;
3783
3784 return NULL;
3785 }
3786
3787 /* Allocate a pointer to live in a linker created section. */
3788
3789 static bfd_boolean
3790 elf_allocate_pointer_linker_section (bfd *abfd,
3791 elf_linker_section_t *lsect,
3792 struct elf_link_hash_entry *h,
3793 const Elf_Internal_Rela *rel)
3794 {
3795 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3796 elf_linker_section_pointers_t *linker_section_ptr;
3797 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3798 bfd_size_type amt;
3799
3800 BFD_ASSERT (lsect != NULL);
3801
3802 /* Is this a global symbol? */
3803 if (h != NULL)
3804 {
3805 struct ppc_elf_link_hash_entry *eh;
3806
3807 /* Has this symbol already been allocated? If so, our work is done. */
3808 eh = (struct ppc_elf_link_hash_entry *) h;
3809 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3810 rel->r_addend,
3811 lsect))
3812 return TRUE;
3813
3814 ptr_linker_section_ptr = &eh->linker_section_pointer;
3815 }
3816 else
3817 {
3818 BFD_ASSERT (is_ppc_elf (abfd));
3819
3820 /* Allocation of a pointer to a local symbol. */
3821 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3822
3823 /* Allocate a table to hold the local symbols if first time. */
3824 if (!ptr)
3825 {
3826 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3827
3828 amt = num_symbols;
3829 amt *= sizeof (elf_linker_section_pointers_t *);
3830 ptr = bfd_zalloc (abfd, amt);
3831
3832 if (!ptr)
3833 return FALSE;
3834
3835 elf_local_ptr_offsets (abfd) = ptr;
3836 }
3837
3838 /* Has this symbol already been allocated? If so, our work is done. */
3839 if (elf_find_pointer_linker_section (ptr[r_symndx],
3840 rel->r_addend,
3841 lsect))
3842 return TRUE;
3843
3844 ptr_linker_section_ptr = &ptr[r_symndx];
3845 }
3846
3847 /* Allocate space for a pointer in the linker section, and allocate
3848 a new pointer record from internal memory. */
3849 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3850 amt = sizeof (elf_linker_section_pointers_t);
3851 linker_section_ptr = bfd_alloc (abfd, amt);
3852
3853 if (!linker_section_ptr)
3854 return FALSE;
3855
3856 linker_section_ptr->next = *ptr_linker_section_ptr;
3857 linker_section_ptr->addend = rel->r_addend;
3858 linker_section_ptr->lsect = lsect;
3859 *ptr_linker_section_ptr = linker_section_ptr;
3860
3861 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3862 return FALSE;
3863 linker_section_ptr->offset = lsect->section->size;
3864 lsect->section->size += 4;
3865
3866 #ifdef DEBUG
3867 fprintf (stderr,
3868 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3869 lsect->name, (long) linker_section_ptr->offset,
3870 (long) lsect->section->size);
3871 #endif
3872
3873 return TRUE;
3874 }
3875
3876 static struct plt_entry **
3877 update_local_sym_info (bfd *abfd,
3878 Elf_Internal_Shdr *symtab_hdr,
3879 unsigned long r_symndx,
3880 int tls_type)
3881 {
3882 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3883 struct plt_entry **local_plt;
3884 char *local_got_tls_masks;
3885
3886 if (local_got_refcounts == NULL)
3887 {
3888 bfd_size_type size = symtab_hdr->sh_info;
3889
3890 size *= (sizeof (*local_got_refcounts)
3891 + sizeof (*local_plt)
3892 + sizeof (*local_got_tls_masks));
3893 local_got_refcounts = bfd_zalloc (abfd, size);
3894 if (local_got_refcounts == NULL)
3895 return NULL;
3896 elf_local_got_refcounts (abfd) = local_got_refcounts;
3897 }
3898
3899 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3900 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3901 local_got_tls_masks[r_symndx] |= tls_type;
3902 if (tls_type != PLT_IFUNC)
3903 local_got_refcounts[r_symndx] += 1;
3904 return local_plt + r_symndx;
3905 }
3906
3907 static bfd_boolean
3908 update_plt_info (bfd *abfd, struct plt_entry **plist,
3909 asection *sec, bfd_vma addend)
3910 {
3911 struct plt_entry *ent;
3912
3913 if (addend < 32768)
3914 sec = NULL;
3915 for (ent = *plist; ent != NULL; ent = ent->next)
3916 if (ent->sec == sec && ent->addend == addend)
3917 break;
3918 if (ent == NULL)
3919 {
3920 bfd_size_type amt = sizeof (*ent);
3921 ent = bfd_alloc (abfd, amt);
3922 if (ent == NULL)
3923 return FALSE;
3924 ent->next = *plist;
3925 ent->sec = sec;
3926 ent->addend = addend;
3927 ent->plt.refcount = 0;
3928 *plist = ent;
3929 }
3930 ent->plt.refcount += 1;
3931 return TRUE;
3932 }
3933
3934 static struct plt_entry *
3935 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3936 {
3937 struct plt_entry *ent;
3938
3939 if (addend < 32768)
3940 sec = NULL;
3941 for (ent = *plist; ent != NULL; ent = ent->next)
3942 if (ent->sec == sec && ent->addend == addend)
3943 break;
3944 return ent;
3945 }
3946
3947 static bfd_boolean
3948 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3949 {
3950 return (r_type == R_PPC_PLTREL24
3951 || r_type == R_PPC_LOCAL24PC
3952 || r_type == R_PPC_REL24
3953 || r_type == R_PPC_REL14
3954 || r_type == R_PPC_REL14_BRTAKEN
3955 || r_type == R_PPC_REL14_BRNTAKEN
3956 || r_type == R_PPC_ADDR24
3957 || r_type == R_PPC_ADDR14
3958 || r_type == R_PPC_ADDR14_BRTAKEN
3959 || r_type == R_PPC_ADDR14_BRNTAKEN
3960 || r_type == R_PPC_VLE_REL24);
3961 }
3962
3963 static void
3964 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3965 {
3966 _bfd_error_handler
3967 /* xgettext:c-format */
3968 (_("%B: relocation %s cannot be used when making a shared object"),
3969 abfd,
3970 ppc_elf_howto_table[r_type]->name);
3971 bfd_set_error (bfd_error_bad_value);
3972 }
3973
3974 /* Look through the relocs for a section during the first phase, and
3975 allocate space in the global offset table or procedure linkage
3976 table. */
3977
3978 static bfd_boolean
3979 ppc_elf_check_relocs (bfd *abfd,
3980 struct bfd_link_info *info,
3981 asection *sec,
3982 const Elf_Internal_Rela *relocs)
3983 {
3984 struct ppc_elf_link_hash_table *htab;
3985 Elf_Internal_Shdr *symtab_hdr;
3986 struct elf_link_hash_entry **sym_hashes;
3987 const Elf_Internal_Rela *rel;
3988 const Elf_Internal_Rela *rel_end;
3989 asection *got2, *sreloc;
3990 struct elf_link_hash_entry *tga;
3991
3992 if (bfd_link_relocatable (info))
3993 return TRUE;
3994
3995 /* Don't do anything special with non-loaded, non-alloced sections.
3996 In particular, any relocs in such sections should not affect GOT
3997 and PLT reference counting (ie. we don't allow them to create GOT
3998 or PLT entries), there's no possibility or desire to optimize TLS
3999 relocs, and there's not much point in propagating relocs to shared
4000 libs that the dynamic linker won't relocate. */
4001 if ((sec->flags & SEC_ALLOC) == 0)
4002 return TRUE;
4003
4004 #ifdef DEBUG
4005 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4006 sec, abfd);
4007 #endif
4008
4009 BFD_ASSERT (is_ppc_elf (abfd));
4010
4011 /* Initialize howto table if not already done. */
4012 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4013 ppc_elf_howto_init ();
4014
4015 htab = ppc_elf_hash_table (info);
4016 if (htab->glink == NULL)
4017 {
4018 if (htab->elf.dynobj == NULL)
4019 htab->elf.dynobj = abfd;
4020 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4021 return FALSE;
4022 }
4023 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4024 FALSE, FALSE, TRUE);
4025 symtab_hdr = &elf_symtab_hdr (abfd);
4026 sym_hashes = elf_sym_hashes (abfd);
4027 got2 = bfd_get_section_by_name (abfd, ".got2");
4028 sreloc = NULL;
4029
4030 rel_end = relocs + sec->reloc_count;
4031 for (rel = relocs; rel < rel_end; rel++)
4032 {
4033 unsigned long r_symndx;
4034 enum elf_ppc_reloc_type r_type;
4035 struct elf_link_hash_entry *h;
4036 int tls_type;
4037 struct plt_entry **ifunc;
4038
4039 r_symndx = ELF32_R_SYM (rel->r_info);
4040 if (r_symndx < symtab_hdr->sh_info)
4041 h = NULL;
4042 else
4043 {
4044 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4045 while (h->root.type == bfd_link_hash_indirect
4046 || h->root.type == bfd_link_hash_warning)
4047 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4048
4049 /* PR15323, ref flags aren't set for references in the same
4050 object. */
4051 h->root.non_ir_ref = 1;
4052 }
4053
4054 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4055 This shows up in particular in an R_PPC_ADDR32 in the eabi
4056 startup code. */
4057 if (h != NULL
4058 && htab->elf.sgot == NULL
4059 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4060 {
4061 if (htab->elf.dynobj == NULL)
4062 htab->elf.dynobj = abfd;
4063 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4064 return FALSE;
4065 BFD_ASSERT (h == htab->elf.hgot);
4066 }
4067
4068 tls_type = 0;
4069 r_type = ELF32_R_TYPE (rel->r_info);
4070 ifunc = NULL;
4071 if (h == NULL && !htab->is_vxworks)
4072 {
4073 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4074 abfd, r_symndx);
4075 if (isym == NULL)
4076 return FALSE;
4077
4078 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4079 {
4080 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4081 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4082 PLT_IFUNC);
4083 if (ifunc == NULL)
4084 return FALSE;
4085
4086 /* STT_GNU_IFUNC symbols must have a PLT entry;
4087 In a non-pie executable even when there are
4088 no plt calls. */
4089 if (!bfd_link_pic (info)
4090 || is_branch_reloc (r_type))
4091 {
4092 bfd_vma addend = 0;
4093 if (r_type == R_PPC_PLTREL24)
4094 {
4095 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4096 if (bfd_link_pic (info))
4097 addend = rel->r_addend;
4098 }
4099 if (!update_plt_info (abfd, ifunc, got2, addend))
4100 return FALSE;
4101 }
4102 }
4103 }
4104
4105 if (!htab->is_vxworks
4106 && is_branch_reloc (r_type)
4107 && h != NULL
4108 && h == tga)
4109 {
4110 if (rel != relocs
4111 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4112 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4113 /* We have a new-style __tls_get_addr call with a marker
4114 reloc. */
4115 ;
4116 else
4117 /* Mark this section as having an old-style call. */
4118 sec->has_tls_get_addr_call = 1;
4119 }
4120
4121 switch (r_type)
4122 {
4123 case R_PPC_TLSGD:
4124 case R_PPC_TLSLD:
4125 /* These special tls relocs tie a call to __tls_get_addr with
4126 its parameter symbol. */
4127 break;
4128
4129 case R_PPC_GOT_TLSLD16:
4130 case R_PPC_GOT_TLSLD16_LO:
4131 case R_PPC_GOT_TLSLD16_HI:
4132 case R_PPC_GOT_TLSLD16_HA:
4133 tls_type = TLS_TLS | TLS_LD;
4134 goto dogottls;
4135
4136 case R_PPC_GOT_TLSGD16:
4137 case R_PPC_GOT_TLSGD16_LO:
4138 case R_PPC_GOT_TLSGD16_HI:
4139 case R_PPC_GOT_TLSGD16_HA:
4140 tls_type = TLS_TLS | TLS_GD;
4141 goto dogottls;
4142
4143 case R_PPC_GOT_TPREL16:
4144 case R_PPC_GOT_TPREL16_LO:
4145 case R_PPC_GOT_TPREL16_HI:
4146 case R_PPC_GOT_TPREL16_HA:
4147 if (bfd_link_pic (info))
4148 info->flags |= DF_STATIC_TLS;
4149 tls_type = TLS_TLS | TLS_TPREL;
4150 goto dogottls;
4151
4152 case R_PPC_GOT_DTPREL16:
4153 case R_PPC_GOT_DTPREL16_LO:
4154 case R_PPC_GOT_DTPREL16_HI:
4155 case R_PPC_GOT_DTPREL16_HA:
4156 tls_type = TLS_TLS | TLS_DTPREL;
4157 dogottls:
4158 sec->has_tls_reloc = 1;
4159 /* Fall through. */
4160
4161 /* GOT16 relocations */
4162 case R_PPC_GOT16:
4163 case R_PPC_GOT16_LO:
4164 case R_PPC_GOT16_HI:
4165 case R_PPC_GOT16_HA:
4166 /* This symbol requires a global offset table entry. */
4167 if (htab->elf.sgot == NULL)
4168 {
4169 if (htab->elf.dynobj == NULL)
4170 htab->elf.dynobj = abfd;
4171 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4172 return FALSE;
4173 }
4174 if (h != NULL)
4175 {
4176 h->got.refcount += 1;
4177 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4178 }
4179 else
4180 /* This is a global offset table entry for a local symbol. */
4181 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4182 return FALSE;
4183
4184 /* We may also need a plt entry if the symbol turns out to be
4185 an ifunc. */
4186 if (h != NULL && !bfd_link_pic (info))
4187 {
4188 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4189 return FALSE;
4190 }
4191 break;
4192
4193 /* Indirect .sdata relocation. */
4194 case R_PPC_EMB_SDAI16:
4195 if (bfd_link_pic (info))
4196 {
4197 bad_shared_reloc (abfd, r_type);
4198 return FALSE;
4199 }
4200 htab->sdata[0].sym->ref_regular = 1;
4201 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4202 h, rel))
4203 return FALSE;
4204 if (h != NULL)
4205 {
4206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4207 h->non_got_ref = TRUE;
4208 }
4209 break;
4210
4211 /* Indirect .sdata2 relocation. */
4212 case R_PPC_EMB_SDA2I16:
4213 if (bfd_link_pic (info))
4214 {
4215 bad_shared_reloc (abfd, r_type);
4216 return FALSE;
4217 }
4218 htab->sdata[1].sym->ref_regular = 1;
4219 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4220 h, rel))
4221 return FALSE;
4222 if (h != NULL)
4223 {
4224 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4225 h->non_got_ref = TRUE;
4226 }
4227 break;
4228
4229 case R_PPC_SDAREL16:
4230 htab->sdata[0].sym->ref_regular = 1;
4231 /* Fall through. */
4232
4233 case R_PPC_VLE_SDAREL_LO16A:
4234 case R_PPC_VLE_SDAREL_LO16D:
4235 case R_PPC_VLE_SDAREL_HI16A:
4236 case R_PPC_VLE_SDAREL_HI16D:
4237 case R_PPC_VLE_SDAREL_HA16A:
4238 case R_PPC_VLE_SDAREL_HA16D:
4239 if (h != NULL)
4240 {
4241 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4242 h->non_got_ref = TRUE;
4243 }
4244 break;
4245
4246 case R_PPC_VLE_REL8:
4247 case R_PPC_VLE_REL15:
4248 case R_PPC_VLE_REL24:
4249 case R_PPC_VLE_LO16A:
4250 case R_PPC_VLE_LO16D:
4251 case R_PPC_VLE_HI16A:
4252 case R_PPC_VLE_HI16D:
4253 case R_PPC_VLE_HA16A:
4254 case R_PPC_VLE_HA16D:
4255 break;
4256
4257 case R_PPC_EMB_SDA2REL:
4258 if (bfd_link_pic (info))
4259 {
4260 bad_shared_reloc (abfd, r_type);
4261 return FALSE;
4262 }
4263 htab->sdata[1].sym->ref_regular = 1;
4264 if (h != NULL)
4265 {
4266 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4267 h->non_got_ref = TRUE;
4268 }
4269 break;
4270
4271 case R_PPC_VLE_SDA21_LO:
4272 case R_PPC_VLE_SDA21:
4273 case R_PPC_EMB_SDA21:
4274 case R_PPC_EMB_RELSDA:
4275 if (bfd_link_pic (info))
4276 {
4277 bad_shared_reloc (abfd, r_type);
4278 return FALSE;
4279 }
4280 if (h != NULL)
4281 {
4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4283 h->non_got_ref = TRUE;
4284 }
4285 break;
4286
4287 case R_PPC_EMB_NADDR32:
4288 case R_PPC_EMB_NADDR16:
4289 case R_PPC_EMB_NADDR16_LO:
4290 case R_PPC_EMB_NADDR16_HI:
4291 case R_PPC_EMB_NADDR16_HA:
4292 if (bfd_link_pic (info))
4293 {
4294 bad_shared_reloc (abfd, r_type);
4295 return FALSE;
4296 }
4297 if (h != NULL)
4298 h->non_got_ref = TRUE;
4299 break;
4300
4301 case R_PPC_PLTREL24:
4302 if (h == NULL)
4303 break;
4304 /* Fall through */
4305 case R_PPC_PLT32:
4306 case R_PPC_PLTREL32:
4307 case R_PPC_PLT16_LO:
4308 case R_PPC_PLT16_HI:
4309 case R_PPC_PLT16_HA:
4310 #ifdef DEBUG
4311 fprintf (stderr, "Reloc requires a PLT entry\n");
4312 #endif
4313 /* This symbol requires a procedure linkage table entry. */
4314 if (h == NULL)
4315 {
4316 if (ifunc == NULL)
4317 {
4318 /* It does not make sense to have a procedure linkage
4319 table entry for a non-ifunc local symbol. */
4320 info->callbacks->einfo
4321 /* xgettext:c-format */
4322 (_("%H: %s reloc against local symbol\n"),
4323 abfd, sec, rel->r_offset,
4324 ppc_elf_howto_table[r_type]->name);
4325 bfd_set_error (bfd_error_bad_value);
4326 return FALSE;
4327 }
4328 }
4329 else
4330 {
4331 bfd_vma addend = 0;
4332
4333 if (r_type == R_PPC_PLTREL24)
4334 {
4335 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4336 if (bfd_link_pic (info))
4337 addend = rel->r_addend;
4338 }
4339 h->needs_plt = 1;
4340 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4341 return FALSE;
4342 }
4343 break;
4344
4345 /* The following relocations don't need to propagate the
4346 relocation if linking a shared object since they are
4347 section relative. */
4348 case R_PPC_SECTOFF:
4349 case R_PPC_SECTOFF_LO:
4350 case R_PPC_SECTOFF_HI:
4351 case R_PPC_SECTOFF_HA:
4352 case R_PPC_DTPREL16:
4353 case R_PPC_DTPREL16_LO:
4354 case R_PPC_DTPREL16_HI:
4355 case R_PPC_DTPREL16_HA:
4356 case R_PPC_TOC16:
4357 break;
4358
4359 case R_PPC_REL16:
4360 case R_PPC_REL16_LO:
4361 case R_PPC_REL16_HI:
4362 case R_PPC_REL16_HA:
4363 case R_PPC_REL16DX_HA:
4364 ppc_elf_tdata (abfd)->has_rel16 = 1;
4365 break;
4366
4367 /* These are just markers. */
4368 case R_PPC_TLS:
4369 case R_PPC_EMB_MRKREF:
4370 case R_PPC_NONE:
4371 case R_PPC_max:
4372 case R_PPC_RELAX:
4373 case R_PPC_RELAX_PLT:
4374 case R_PPC_RELAX_PLTREL24:
4375 case R_PPC_16DX_HA:
4376 break;
4377
4378 /* These should only appear in dynamic objects. */
4379 case R_PPC_COPY:
4380 case R_PPC_GLOB_DAT:
4381 case R_PPC_JMP_SLOT:
4382 case R_PPC_RELATIVE:
4383 case R_PPC_IRELATIVE:
4384 break;
4385
4386 /* These aren't handled yet. We'll report an error later. */
4387 case R_PPC_ADDR30:
4388 case R_PPC_EMB_RELSEC16:
4389 case R_PPC_EMB_RELST_LO:
4390 case R_PPC_EMB_RELST_HI:
4391 case R_PPC_EMB_RELST_HA:
4392 case R_PPC_EMB_BIT_FLD:
4393 break;
4394
4395 /* This refers only to functions defined in the shared library. */
4396 case R_PPC_LOCAL24PC:
4397 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4398 {
4399 htab->plt_type = PLT_OLD;
4400 htab->old_bfd = abfd;
4401 }
4402 if (h != NULL && h->type == STT_GNU_IFUNC)
4403 {
4404 h->needs_plt = 1;
4405 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4406 return FALSE;
4407 }
4408 break;
4409
4410 /* This relocation describes the C++ object vtable hierarchy.
4411 Reconstruct it for later use during GC. */
4412 case R_PPC_GNU_VTINHERIT:
4413 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4414 return FALSE;
4415 break;
4416
4417 /* This relocation describes which C++ vtable entries are actually
4418 used. Record for later use during GC. */
4419 case R_PPC_GNU_VTENTRY:
4420 BFD_ASSERT (h != NULL);
4421 if (h != NULL
4422 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4423 return FALSE;
4424 break;
4425
4426 /* We shouldn't really be seeing these. */
4427 case R_PPC_TPREL32:
4428 case R_PPC_TPREL16:
4429 case R_PPC_TPREL16_LO:
4430 case R_PPC_TPREL16_HI:
4431 case R_PPC_TPREL16_HA:
4432 if (bfd_link_pic (info))
4433 info->flags |= DF_STATIC_TLS;
4434 goto dodyn;
4435
4436 /* Nor these. */
4437 case R_PPC_DTPMOD32:
4438 case R_PPC_DTPREL32:
4439 goto dodyn;
4440
4441 case R_PPC_REL32:
4442 if (h == NULL
4443 && got2 != NULL
4444 && (sec->flags & SEC_CODE) != 0
4445 && bfd_link_pic (info)
4446 && htab->plt_type == PLT_UNSET)
4447 {
4448 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4449 the start of a function, which assembles to a REL32
4450 reference to .got2. If we detect one of these, then
4451 force the old PLT layout because the linker cannot
4452 reliably deduce the GOT pointer value needed for
4453 PLT call stubs. */
4454 asection *s;
4455 Elf_Internal_Sym *isym;
4456
4457 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4458 abfd, r_symndx);
4459 if (isym == NULL)
4460 return FALSE;
4461
4462 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4463 if (s == got2)
4464 {
4465 htab->plt_type = PLT_OLD;
4466 htab->old_bfd = abfd;
4467 }
4468 }
4469 if (h == NULL || h == htab->elf.hgot)
4470 break;
4471 /* fall through */
4472
4473 case R_PPC_ADDR32:
4474 case R_PPC_ADDR16:
4475 case R_PPC_ADDR16_LO:
4476 case R_PPC_ADDR16_HI:
4477 case R_PPC_ADDR16_HA:
4478 case R_PPC_UADDR32:
4479 case R_PPC_UADDR16:
4480 if (h != NULL && !bfd_link_pic (info))
4481 {
4482 /* We may need a plt entry if the symbol turns out to be
4483 a function defined in a dynamic object. */
4484 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4485 return FALSE;
4486
4487 /* We may need a copy reloc too. */
4488 h->non_got_ref = 1;
4489 h->pointer_equality_needed = 1;
4490 if (r_type == R_PPC_ADDR16_HA)
4491 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4492 if (r_type == R_PPC_ADDR16_LO)
4493 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4494 }
4495 goto dodyn;
4496
4497 case R_PPC_REL24:
4498 case R_PPC_REL14:
4499 case R_PPC_REL14_BRTAKEN:
4500 case R_PPC_REL14_BRNTAKEN:
4501 if (h == NULL)
4502 break;
4503 if (h == htab->elf.hgot)
4504 {
4505 if (htab->plt_type == PLT_UNSET)
4506 {
4507 htab->plt_type = PLT_OLD;
4508 htab->old_bfd = abfd;
4509 }
4510 break;
4511 }
4512 /* fall through */
4513
4514 case R_PPC_ADDR24:
4515 case R_PPC_ADDR14:
4516 case R_PPC_ADDR14_BRTAKEN:
4517 case R_PPC_ADDR14_BRNTAKEN:
4518 if (h != NULL && !bfd_link_pic (info))
4519 {
4520 /* We may need a plt entry if the symbol turns out to be
4521 a function defined in a dynamic object. */
4522 h->needs_plt = 1;
4523 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4524 return FALSE;
4525 break;
4526 }
4527
4528 dodyn:
4529 /* If we are creating a shared library, and this is a reloc
4530 against a global symbol, or a non PC relative reloc
4531 against a local symbol, then we need to copy the reloc
4532 into the shared library. However, if we are linking with
4533 -Bsymbolic, we do not need to copy a reloc against a
4534 global symbol which is defined in an object we are
4535 including in the link (i.e., DEF_REGULAR is set). At
4536 this point we have not seen all the input files, so it is
4537 possible that DEF_REGULAR is not set now but will be set
4538 later (it is never cleared). In case of a weak definition,
4539 DEF_REGULAR may be cleared later by a strong definition in
4540 a shared library. We account for that possibility below by
4541 storing information in the dyn_relocs field of the hash
4542 table entry. A similar situation occurs when creating
4543 shared libraries and symbol visibility changes render the
4544 symbol local.
4545
4546 If on the other hand, we are creating an executable, we
4547 may need to keep relocations for symbols satisfied by a
4548 dynamic library if we manage to avoid copy relocs for the
4549 symbol. */
4550 if ((bfd_link_pic (info)
4551 && (must_be_dyn_reloc (info, r_type)
4552 || (h != NULL
4553 && (!SYMBOLIC_BIND (info, h)
4554 || h->root.type == bfd_link_hash_defweak
4555 || !h->def_regular))))
4556 || (ELIMINATE_COPY_RELOCS
4557 && !bfd_link_pic (info)
4558 && h != NULL
4559 && (h->root.type == bfd_link_hash_defweak
4560 || !h->def_regular)))
4561 {
4562 #ifdef DEBUG
4563 fprintf (stderr,
4564 "ppc_elf_check_relocs needs to "
4565 "create relocation for %s\n",
4566 (h && h->root.root.string
4567 ? h->root.root.string : "<unknown>"));
4568 #endif
4569 if (sreloc == NULL)
4570 {
4571 if (htab->elf.dynobj == NULL)
4572 htab->elf.dynobj = abfd;
4573
4574 sreloc = _bfd_elf_make_dynamic_reloc_section
4575 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4576
4577 if (sreloc == NULL)
4578 return FALSE;
4579 }
4580
4581 /* If this is a global symbol, we count the number of
4582 relocations we need for this symbol. */
4583 if (h != NULL)
4584 {
4585 struct elf_dyn_relocs *p;
4586 struct elf_dyn_relocs **rel_head;
4587
4588 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4589 p = *rel_head;
4590 if (p == NULL || p->sec != sec)
4591 {
4592 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4593 if (p == NULL)
4594 return FALSE;
4595 p->next = *rel_head;
4596 *rel_head = p;
4597 p->sec = sec;
4598 p->count = 0;
4599 p->pc_count = 0;
4600 }
4601 p->count += 1;
4602 if (!must_be_dyn_reloc (info, r_type))
4603 p->pc_count += 1;
4604 }
4605 else
4606 {
4607 /* Track dynamic relocs needed for local syms too.
4608 We really need local syms available to do this
4609 easily. Oh well. */
4610 struct ppc_dyn_relocs *p;
4611 struct ppc_dyn_relocs **rel_head;
4612 bfd_boolean is_ifunc;
4613 asection *s;
4614 void *vpp;
4615 Elf_Internal_Sym *isym;
4616
4617 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4618 abfd, r_symndx);
4619 if (isym == NULL)
4620 return FALSE;
4621
4622 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4623 if (s == NULL)
4624 s = sec;
4625
4626 vpp = &elf_section_data (s)->local_dynrel;
4627 rel_head = (struct ppc_dyn_relocs **) vpp;
4628 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4629 p = *rel_head;
4630 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4631 p = p->next;
4632 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4633 {
4634 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4635 if (p == NULL)
4636 return FALSE;
4637 p->next = *rel_head;
4638 *rel_head = p;
4639 p->sec = sec;
4640 p->ifunc = is_ifunc;
4641 p->count = 0;
4642 }
4643 p->count += 1;
4644 }
4645 }
4646
4647 break;
4648 }
4649 }
4650
4651 return TRUE;
4652 }
4653 \f
4654 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4655 and OBFD, and merge non-conflicting ones. */
4656 void
4657 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4658 {
4659 bfd *obfd = info->output_bfd;
4660 obj_attribute *in_attr, *in_attrs;
4661 obj_attribute *out_attr, *out_attrs;
4662
4663 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4664 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4665
4666 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4667 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4668
4669 if (in_attr->i != out_attr->i)
4670 {
4671 int in_fp = in_attr->i & 3;
4672 int out_fp = out_attr->i & 3;
4673
4674 if (in_fp == 0)
4675 ;
4676 else if (out_fp == 0)
4677 {
4678 out_attr->type = 1;
4679 out_attr->i ^= in_fp;
4680 }
4681 else if (out_fp != 2 && in_fp == 2)
4682 _bfd_error_handler
4683 /* xgettext:c-format */
4684 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4685 else if (out_fp == 2 && in_fp != 2)
4686 _bfd_error_handler
4687 /* xgettext:c-format */
4688 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4689 else if (out_fp == 1 && in_fp == 3)
4690 _bfd_error_handler
4691 /* xgettext:c-format */
4692 (_("Warning: %B uses double-precision hard float, "
4693 "%B uses single-precision hard float"), obfd, ibfd);
4694 else if (out_fp == 3 && in_fp == 1)
4695 _bfd_error_handler
4696 /* xgettext:c-format */
4697 (_("Warning: %B uses double-precision hard float, "
4698 "%B uses single-precision hard float"), ibfd, obfd);
4699
4700 in_fp = in_attr->i & 0xc;
4701 out_fp = out_attr->i & 0xc;
4702 if (in_fp == 0)
4703 ;
4704 else if (out_fp == 0)
4705 {
4706 out_attr->type = 1;
4707 out_attr->i ^= in_fp;
4708 }
4709 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4710 _bfd_error_handler
4711 /* xgettext:c-format */
4712 (_("Warning: %B uses 64-bit long double, "
4713 "%B uses 128-bit long double"), ibfd, obfd);
4714 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4715 _bfd_error_handler
4716 /* xgettext:c-format */
4717 (_("Warning: %B uses 64-bit long double, "
4718 "%B uses 128-bit long double"), obfd, ibfd);
4719 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4720 _bfd_error_handler
4721 /* xgettext:c-format */
4722 (_("Warning: %B uses IBM long double, "
4723 "%B uses IEEE long double"), ibfd, obfd);
4724 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4725 _bfd_error_handler
4726 /* xgettext:c-format */
4727 (_("Warning: %B uses IBM long double, "
4728 "%B uses IEEE long double"), obfd, ibfd);
4729 }
4730 }
4731
4732 /* Merge object attributes from IBFD into OBFD. Warn if
4733 there are conflicting attributes. */
4734 static bfd_boolean
4735 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4736 {
4737 bfd *obfd;
4738 obj_attribute *in_attr, *in_attrs;
4739 obj_attribute *out_attr, *out_attrs;
4740
4741 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4742
4743 obfd = info->output_bfd;
4744 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4745 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4746
4747 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4748 merge non-conflicting ones. */
4749 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4750 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4751 if (in_attr->i != out_attr->i)
4752 {
4753 int in_vec = in_attr->i & 3;
4754 int out_vec = out_attr->i & 3;
4755
4756 if (in_vec == 0)
4757 ;
4758 else if (out_vec == 0)
4759 {
4760 out_attr->type = 1;
4761 out_attr->i = in_vec;
4762 }
4763 /* For now, allow generic to transition to AltiVec or SPE
4764 without a warning. If GCC marked files with their stack
4765 alignment and used don't-care markings for files which are
4766 not affected by the vector ABI, we could warn about this
4767 case too. */
4768 else if (in_vec == 1)
4769 ;
4770 else if (out_vec == 1)
4771 {
4772 out_attr->type = 1;
4773 out_attr->i = in_vec;
4774 }
4775 else if (out_vec < in_vec)
4776 _bfd_error_handler
4777 /* xgettext:c-format */
4778 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4779 obfd, ibfd);
4780 else if (out_vec > in_vec)
4781 _bfd_error_handler
4782 /* xgettext:c-format */
4783 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4784 ibfd, obfd);
4785 }
4786
4787 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4788 and merge non-conflicting ones. */
4789 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4790 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4791 if (in_attr->i != out_attr->i)
4792 {
4793 int in_struct = in_attr->i & 3;
4794 int out_struct = out_attr->i & 3;
4795
4796 if (in_struct == 0 || in_struct == 3)
4797 ;
4798 else if (out_struct == 0)
4799 {
4800 out_attr->type = 1;
4801 out_attr->i = in_struct;
4802 }
4803 else if (out_struct < in_struct)
4804 _bfd_error_handler
4805 /* xgettext:c-format */
4806 (_("Warning: %B uses r3/r4 for small structure returns, "
4807 "%B uses memory"), obfd, ibfd);
4808 else if (out_struct > in_struct)
4809 _bfd_error_handler
4810 /* xgettext:c-format */
4811 (_("Warning: %B uses r3/r4 for small structure returns, "
4812 "%B uses memory"), ibfd, obfd);
4813 }
4814
4815 /* Merge Tag_compatibility attributes and any common GNU ones. */
4816 _bfd_elf_merge_object_attributes (ibfd, info);
4817
4818 return TRUE;
4819 }
4820
4821 /* Merge backend specific data from an object file to the output
4822 object file when linking. */
4823
4824 static bfd_boolean
4825 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4826 {
4827 bfd *obfd = info->output_bfd;
4828 flagword old_flags;
4829 flagword new_flags;
4830 bfd_boolean error;
4831
4832 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4833 return TRUE;
4834
4835 /* Check if we have the same endianness. */
4836 if (! _bfd_generic_verify_endian_match (ibfd, info))
4837 return FALSE;
4838
4839 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4840 return FALSE;
4841
4842 new_flags = elf_elfheader (ibfd)->e_flags;
4843 old_flags = elf_elfheader (obfd)->e_flags;
4844 if (!elf_flags_init (obfd))
4845 {
4846 /* First call, no flags set. */
4847 elf_flags_init (obfd) = TRUE;
4848 elf_elfheader (obfd)->e_flags = new_flags;
4849 }
4850
4851 /* Compatible flags are ok. */
4852 else if (new_flags == old_flags)
4853 ;
4854
4855 /* Incompatible flags. */
4856 else
4857 {
4858 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4859 to be linked with either. */
4860 error = FALSE;
4861 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4862 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4863 {
4864 error = TRUE;
4865 _bfd_error_handler
4866 (_("%B: compiled with -mrelocatable and linked with "
4867 "modules compiled normally"), ibfd);
4868 }
4869 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4870 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4871 {
4872 error = TRUE;
4873 _bfd_error_handler
4874 (_("%B: compiled normally and linked with "
4875 "modules compiled with -mrelocatable"), ibfd);
4876 }
4877
4878 /* The output is -mrelocatable-lib iff both the input files are. */
4879 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4880 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4881
4882 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4883 but each input file is either -mrelocatable or -mrelocatable-lib. */
4884 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4885 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4886 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4887 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4888
4889 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4890 any module uses it. */
4891 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4892
4893 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4894 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4895
4896 /* Warn about any other mismatches. */
4897 if (new_flags != old_flags)
4898 {
4899 error = TRUE;
4900 _bfd_error_handler
4901 /* xgettext:c-format */
4902 (_("%B: uses different e_flags (0x%lx) fields "
4903 "than previous modules (0x%lx)"),
4904 ibfd, (long) new_flags, (long) old_flags);
4905 }
4906
4907 if (error)
4908 {
4909 bfd_set_error (bfd_error_bad_value);
4910 return FALSE;
4911 }
4912 }
4913
4914 return TRUE;
4915 }
4916
4917 static void
4918 ppc_elf_vle_split16 (bfd *input_bfd,
4919 asection *input_section,
4920 unsigned long offset,
4921 bfd_byte *loc,
4922 bfd_vma value,
4923 split16_format_type split16_format,
4924 bfd_boolean fixup)
4925 {
4926 unsigned int insn, opcode, top5;
4927
4928 insn = bfd_get_32 (input_bfd, loc);
4929 opcode = insn & 0xfc00f800;
4930 if (opcode == E_OR2I_INSN
4931 || opcode == E_AND2I_DOT_INSN
4932 || opcode == E_OR2IS_INSN
4933 || opcode == E_LIS_INSN
4934 || opcode == E_AND2IS_DOT_INSN)
4935 {
4936 if (split16_format != split16a_type)
4937 {
4938 if (fixup)
4939 split16_format = split16a_type;
4940 else
4941 _bfd_error_handler
4942 /* xgettext:c-format */
4943 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4944 input_bfd, input_section, offset, opcode);
4945 }
4946 }
4947 else if (opcode == E_ADD2I_DOT_INSN
4948 || opcode == E_ADD2IS_INSN
4949 || opcode == E_CMP16I_INSN
4950 || opcode == E_MULL2I_INSN
4951 || opcode == E_CMPL16I_INSN
4952 || opcode == E_CMPH16I_INSN
4953 || opcode == E_CMPHL16I_INSN)
4954 {
4955 if (split16_format != split16d_type)
4956 {
4957 if (fixup)
4958 split16_format = split16d_type;
4959 else
4960 _bfd_error_handler
4961 /* xgettext:c-format */
4962 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4963 input_bfd, input_section, offset, opcode);
4964 }
4965 }
4966 top5 = value & 0xf800;
4967 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4968 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4969 insn |= top5;
4970 insn |= value & 0x7ff;
4971 bfd_put_32 (input_bfd, insn, loc);
4972 }
4973 \f
4974 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4975 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4976 int
4977 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4978 struct bfd_link_info *info)
4979 {
4980 struct ppc_elf_link_hash_table *htab;
4981 flagword flags;
4982
4983 htab = ppc_elf_hash_table (info);
4984
4985 if (htab->plt_type == PLT_UNSET)
4986 {
4987 struct elf_link_hash_entry *h;
4988
4989 if (htab->params->plt_style == PLT_OLD)
4990 htab->plt_type = PLT_OLD;
4991 else if (bfd_link_pic (info)
4992 && htab->elf.dynamic_sections_created
4993 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4994 FALSE, FALSE, TRUE)) != NULL
4995 && (h->type == STT_FUNC
4996 || h->needs_plt)
4997 && h->ref_regular
4998 && !(SYMBOL_CALLS_LOCAL (info, h)
4999 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5000 && h->root.type == bfd_link_hash_undefweak)))
5001 {
5002 /* Profiling of shared libs (and pies) is not supported with
5003 secure plt, because ppc32 does profiling before a
5004 function prologue and a secure plt pic call stubs needs
5005 r30 to be set up. */
5006 htab->plt_type = PLT_OLD;
5007 }
5008 else
5009 {
5010 bfd *ibfd;
5011 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5012
5013 /* Look through the reloc flags left by ppc_elf_check_relocs.
5014 Use the old style bss plt if a file makes plt calls
5015 without using the new relocs, and if ld isn't given
5016 --secure-plt and we never see REL16 relocs. */
5017 if (plt_type == PLT_UNSET)
5018 plt_type = PLT_OLD;
5019 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5020 if (is_ppc_elf (ibfd))
5021 {
5022 if (ppc_elf_tdata (ibfd)->has_rel16)
5023 plt_type = PLT_NEW;
5024 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5025 {
5026 plt_type = PLT_OLD;
5027 htab->old_bfd = ibfd;
5028 break;
5029 }
5030 }
5031 htab->plt_type = plt_type;
5032 }
5033 }
5034 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5035 {
5036 if (htab->old_bfd != NULL)
5037 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5038 htab->old_bfd);
5039 else
5040 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5041 }
5042
5043 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5044
5045 if (htab->plt_type == PLT_NEW)
5046 {
5047 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5048 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5049
5050 /* The new PLT is a loaded section. */
5051 if (htab->elf.splt != NULL
5052 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5053 return -1;
5054
5055 /* The new GOT is not executable. */
5056 if (htab->elf.sgot != NULL
5057 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5058 return -1;
5059 }
5060 else
5061 {
5062 /* Stop an unused .glink section from affecting .text alignment. */
5063 if (htab->glink != NULL
5064 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5065 return -1;
5066 }
5067 return htab->plt_type == PLT_NEW;
5068 }
5069 \f
5070 /* Return the section that should be marked against GC for a given
5071 relocation. */
5072
5073 static asection *
5074 ppc_elf_gc_mark_hook (asection *sec,
5075 struct bfd_link_info *info,
5076 Elf_Internal_Rela *rel,
5077 struct elf_link_hash_entry *h,
5078 Elf_Internal_Sym *sym)
5079 {
5080 if (h != NULL)
5081 switch (ELF32_R_TYPE (rel->r_info))
5082 {
5083 case R_PPC_GNU_VTINHERIT:
5084 case R_PPC_GNU_VTENTRY:
5085 return NULL;
5086 }
5087
5088 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5089 }
5090
5091 /* Update the got, plt and dynamic reloc reference counts for the
5092 section being removed. */
5093
5094 static bfd_boolean
5095 ppc_elf_gc_sweep_hook (bfd *abfd,
5096 struct bfd_link_info *info,
5097 asection *sec,
5098 const Elf_Internal_Rela *relocs)
5099 {
5100 struct ppc_elf_link_hash_table *htab;
5101 Elf_Internal_Shdr *symtab_hdr;
5102 struct elf_link_hash_entry **sym_hashes;
5103 bfd_signed_vma *local_got_refcounts;
5104 const Elf_Internal_Rela *rel, *relend;
5105 asection *got2;
5106
5107 if (bfd_link_relocatable (info))
5108 return TRUE;
5109
5110 if ((sec->flags & SEC_ALLOC) == 0)
5111 return TRUE;
5112
5113 elf_section_data (sec)->local_dynrel = NULL;
5114
5115 htab = ppc_elf_hash_table (info);
5116 symtab_hdr = &elf_symtab_hdr (abfd);
5117 sym_hashes = elf_sym_hashes (abfd);
5118 local_got_refcounts = elf_local_got_refcounts (abfd);
5119 got2 = bfd_get_section_by_name (abfd, ".got2");
5120
5121 relend = relocs + sec->reloc_count;
5122 for (rel = relocs; rel < relend; rel++)
5123 {
5124 unsigned long r_symndx;
5125 enum elf_ppc_reloc_type r_type;
5126 struct elf_link_hash_entry *h = NULL;
5127
5128 r_symndx = ELF32_R_SYM (rel->r_info);
5129 if (r_symndx >= symtab_hdr->sh_info)
5130 {
5131 struct elf_dyn_relocs **pp, *p;
5132 struct ppc_elf_link_hash_entry *eh;
5133
5134 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5135 while (h->root.type == bfd_link_hash_indirect
5136 || h->root.type == bfd_link_hash_warning)
5137 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5138 eh = (struct ppc_elf_link_hash_entry *) h;
5139
5140 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5141 if (p->sec == sec)
5142 {
5143 /* Everything must go for SEC. */
5144 *pp = p->next;
5145 break;
5146 }
5147 }
5148
5149 r_type = ELF32_R_TYPE (rel->r_info);
5150 if (!htab->is_vxworks
5151 && h == NULL
5152 && local_got_refcounts != NULL
5153 && (!bfd_link_pic (info)
5154 || is_branch_reloc (r_type)))
5155 {
5156 struct plt_entry **local_plt = (struct plt_entry **)
5157 (local_got_refcounts + symtab_hdr->sh_info);
5158 char *local_got_tls_masks = (char *)
5159 (local_plt + symtab_hdr->sh_info);
5160 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5161 {
5162 struct plt_entry **ifunc = local_plt + r_symndx;
5163 bfd_vma addend = 0;
5164 struct plt_entry *ent;
5165
5166 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5167 addend = rel->r_addend;
5168 ent = find_plt_ent (ifunc, got2, addend);
5169 if (ent->plt.refcount > 0)
5170 ent->plt.refcount -= 1;
5171 continue;
5172 }
5173 }
5174
5175 switch (r_type)
5176 {
5177 case R_PPC_GOT_TLSLD16:
5178 case R_PPC_GOT_TLSLD16_LO:
5179 case R_PPC_GOT_TLSLD16_HI:
5180 case R_PPC_GOT_TLSLD16_HA:
5181 case R_PPC_GOT_TLSGD16:
5182 case R_PPC_GOT_TLSGD16_LO:
5183 case R_PPC_GOT_TLSGD16_HI:
5184 case R_PPC_GOT_TLSGD16_HA:
5185 case R_PPC_GOT_TPREL16:
5186 case R_PPC_GOT_TPREL16_LO:
5187 case R_PPC_GOT_TPREL16_HI:
5188 case R_PPC_GOT_TPREL16_HA:
5189 case R_PPC_GOT_DTPREL16:
5190 case R_PPC_GOT_DTPREL16_LO:
5191 case R_PPC_GOT_DTPREL16_HI:
5192 case R_PPC_GOT_DTPREL16_HA:
5193 case R_PPC_GOT16:
5194 case R_PPC_GOT16_LO:
5195 case R_PPC_GOT16_HI:
5196 case R_PPC_GOT16_HA:
5197 if (h != NULL)
5198 {
5199 if (h->got.refcount > 0)
5200 h->got.refcount--;
5201 if (!bfd_link_pic (info))
5202 {
5203 struct plt_entry *ent;
5204
5205 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5206 if (ent != NULL && ent->plt.refcount > 0)
5207 ent->plt.refcount -= 1;
5208 }
5209 }
5210 else if (local_got_refcounts != NULL)
5211 {
5212 if (local_got_refcounts[r_symndx] > 0)
5213 local_got_refcounts[r_symndx]--;
5214 }
5215 break;
5216
5217 case R_PPC_REL24:
5218 case R_PPC_REL14:
5219 case R_PPC_REL14_BRTAKEN:
5220 case R_PPC_REL14_BRNTAKEN:
5221 case R_PPC_REL32:
5222 if (h == NULL || h == htab->elf.hgot)
5223 break;
5224 /* Fall through. */
5225
5226 case R_PPC_ADDR32:
5227 case R_PPC_ADDR24:
5228 case R_PPC_ADDR16:
5229 case R_PPC_ADDR16_LO:
5230 case R_PPC_ADDR16_HI:
5231 case R_PPC_ADDR16_HA:
5232 case R_PPC_ADDR14:
5233 case R_PPC_ADDR14_BRTAKEN:
5234 case R_PPC_ADDR14_BRNTAKEN:
5235 case R_PPC_UADDR32:
5236 case R_PPC_UADDR16:
5237 if (bfd_link_pic (info))
5238 break;
5239 /* Fall through. */
5240
5241 case R_PPC_PLT32:
5242 case R_PPC_PLTREL24:
5243 case R_PPC_PLTREL32:
5244 case R_PPC_PLT16_LO:
5245 case R_PPC_PLT16_HI:
5246 case R_PPC_PLT16_HA:
5247 if (h != NULL)
5248 {
5249 bfd_vma addend = 0;
5250 struct plt_entry *ent;
5251
5252 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5253 addend = rel->r_addend;
5254 ent = find_plt_ent (&h->plt.plist, got2, addend);
5255 if (ent != NULL && ent->plt.refcount > 0)
5256 ent->plt.refcount -= 1;
5257 }
5258 break;
5259
5260 default:
5261 break;
5262 }
5263 }
5264 return TRUE;
5265 }
5266 \f
5267 /* Set plt output section type, htab->tls_get_addr, and call the
5268 generic ELF tls_setup function. */
5269
5270 asection *
5271 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5272 {
5273 struct ppc_elf_link_hash_table *htab;
5274
5275 htab = ppc_elf_hash_table (info);
5276 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5277 FALSE, FALSE, TRUE);
5278 if (htab->plt_type != PLT_NEW)
5279 htab->params->no_tls_get_addr_opt = TRUE;
5280
5281 if (!htab->params->no_tls_get_addr_opt)
5282 {
5283 struct elf_link_hash_entry *opt, *tga;
5284 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5285 FALSE, FALSE, TRUE);
5286 if (opt != NULL
5287 && (opt->root.type == bfd_link_hash_defined
5288 || opt->root.type == bfd_link_hash_defweak))
5289 {
5290 /* If glibc supports an optimized __tls_get_addr call stub,
5291 signalled by the presence of __tls_get_addr_opt, and we'll
5292 be calling __tls_get_addr via a plt call stub, then
5293 make __tls_get_addr point to __tls_get_addr_opt. */
5294 tga = htab->tls_get_addr;
5295 if (htab->elf.dynamic_sections_created
5296 && tga != NULL
5297 && (tga->type == STT_FUNC
5298 || tga->needs_plt)
5299 && !(SYMBOL_CALLS_LOCAL (info, tga)
5300 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5301 && tga->root.type == bfd_link_hash_undefweak)))
5302 {
5303 struct plt_entry *ent;
5304 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5305 if (ent->plt.refcount > 0)
5306 break;
5307 if (ent != NULL)
5308 {
5309 tga->root.type = bfd_link_hash_indirect;
5310 tga->root.u.i.link = &opt->root;
5311 ppc_elf_copy_indirect_symbol (info, opt, tga);
5312 opt->mark = 1;
5313 if (opt->dynindx != -1)
5314 {
5315 /* Use __tls_get_addr_opt in dynamic relocations. */
5316 opt->dynindx = -1;
5317 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5318 opt->dynstr_index);
5319 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5320 return FALSE;
5321 }
5322 htab->tls_get_addr = opt;
5323 }
5324 }
5325 }
5326 else
5327 htab->params->no_tls_get_addr_opt = TRUE;
5328 }
5329 if (htab->plt_type == PLT_NEW
5330 && htab->elf.splt != NULL
5331 && htab->elf.splt->output_section != NULL)
5332 {
5333 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5334 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5335 }
5336
5337 return _bfd_elf_tls_setup (obfd, info);
5338 }
5339
5340 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5341 HASH. */
5342
5343 static bfd_boolean
5344 branch_reloc_hash_match (const bfd *ibfd,
5345 const Elf_Internal_Rela *rel,
5346 const struct elf_link_hash_entry *hash)
5347 {
5348 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5349 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5350 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5351
5352 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5353 {
5354 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5355 struct elf_link_hash_entry *h;
5356
5357 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5358 while (h->root.type == bfd_link_hash_indirect
5359 || h->root.type == bfd_link_hash_warning)
5360 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5361 if (h == hash)
5362 return TRUE;
5363 }
5364 return FALSE;
5365 }
5366
5367 /* Run through all the TLS relocs looking for optimization
5368 opportunities. */
5369
5370 bfd_boolean
5371 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5372 struct bfd_link_info *info)
5373 {
5374 bfd *ibfd;
5375 asection *sec;
5376 struct ppc_elf_link_hash_table *htab;
5377 int pass;
5378
5379 if (!bfd_link_executable (info))
5380 return TRUE;
5381
5382 htab = ppc_elf_hash_table (info);
5383 if (htab == NULL)
5384 return FALSE;
5385
5386 /* Make two passes through the relocs. First time check that tls
5387 relocs involved in setting up a tls_get_addr call are indeed
5388 followed by such a call. If they are not, don't do any tls
5389 optimization. On the second pass twiddle tls_mask flags to
5390 notify relocate_section that optimization can be done, and
5391 adjust got and plt refcounts. */
5392 for (pass = 0; pass < 2; ++pass)
5393 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5394 {
5395 Elf_Internal_Sym *locsyms = NULL;
5396 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5397 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5398
5399 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5400 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5401 {
5402 Elf_Internal_Rela *relstart, *rel, *relend;
5403 int expecting_tls_get_addr = 0;
5404
5405 /* Read the relocations. */
5406 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5407 info->keep_memory);
5408 if (relstart == NULL)
5409 return FALSE;
5410
5411 relend = relstart + sec->reloc_count;
5412 for (rel = relstart; rel < relend; rel++)
5413 {
5414 enum elf_ppc_reloc_type r_type;
5415 unsigned long r_symndx;
5416 struct elf_link_hash_entry *h = NULL;
5417 char *tls_mask;
5418 char tls_set, tls_clear;
5419 bfd_boolean is_local;
5420 bfd_signed_vma *got_count;
5421
5422 r_symndx = ELF32_R_SYM (rel->r_info);
5423 if (r_symndx >= symtab_hdr->sh_info)
5424 {
5425 struct elf_link_hash_entry **sym_hashes;
5426
5427 sym_hashes = elf_sym_hashes (ibfd);
5428 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5429 while (h->root.type == bfd_link_hash_indirect
5430 || h->root.type == bfd_link_hash_warning)
5431 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5432 }
5433
5434 is_local = FALSE;
5435 if (h == NULL
5436 || !h->def_dynamic)
5437 is_local = TRUE;
5438
5439 r_type = ELF32_R_TYPE (rel->r_info);
5440 /* If this section has old-style __tls_get_addr calls
5441 without marker relocs, then check that each
5442 __tls_get_addr call reloc is preceded by a reloc
5443 that conceivably belongs to the __tls_get_addr arg
5444 setup insn. If we don't find matching arg setup
5445 relocs, don't do any tls optimization. */
5446 if (pass == 0
5447 && sec->has_tls_get_addr_call
5448 && h != NULL
5449 && h == htab->tls_get_addr
5450 && !expecting_tls_get_addr
5451 && is_branch_reloc (r_type))
5452 {
5453 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5454 "TLS optimization disabled\n",
5455 ibfd, sec, rel->r_offset);
5456 if (elf_section_data (sec)->relocs != relstart)
5457 free (relstart);
5458 return TRUE;
5459 }
5460
5461 expecting_tls_get_addr = 0;
5462 switch (r_type)
5463 {
5464 case R_PPC_GOT_TLSLD16:
5465 case R_PPC_GOT_TLSLD16_LO:
5466 expecting_tls_get_addr = 1;
5467 /* Fall through. */
5468
5469 case R_PPC_GOT_TLSLD16_HI:
5470 case R_PPC_GOT_TLSLD16_HA:
5471 /* These relocs should never be against a symbol
5472 defined in a shared lib. Leave them alone if
5473 that turns out to be the case. */
5474 if (!is_local)
5475 continue;
5476
5477 /* LD -> LE */
5478 tls_set = 0;
5479 tls_clear = TLS_LD;
5480 break;
5481
5482 case R_PPC_GOT_TLSGD16:
5483 case R_PPC_GOT_TLSGD16_LO:
5484 expecting_tls_get_addr = 1;
5485 /* Fall through. */
5486
5487 case R_PPC_GOT_TLSGD16_HI:
5488 case R_PPC_GOT_TLSGD16_HA:
5489 if (is_local)
5490 /* GD -> LE */
5491 tls_set = 0;
5492 else
5493 /* GD -> IE */
5494 tls_set = TLS_TLS | TLS_TPRELGD;
5495 tls_clear = TLS_GD;
5496 break;
5497
5498 case R_PPC_GOT_TPREL16:
5499 case R_PPC_GOT_TPREL16_LO:
5500 case R_PPC_GOT_TPREL16_HI:
5501 case R_PPC_GOT_TPREL16_HA:
5502 if (is_local)
5503 {
5504 /* IE -> LE */
5505 tls_set = 0;
5506 tls_clear = TLS_TPREL;
5507 break;
5508 }
5509 else
5510 continue;
5511
5512 case R_PPC_TLSGD:
5513 case R_PPC_TLSLD:
5514 expecting_tls_get_addr = 2;
5515 tls_set = 0;
5516 tls_clear = 0;
5517 break;
5518
5519 default:
5520 continue;
5521 }
5522
5523 if (pass == 0)
5524 {
5525 if (!expecting_tls_get_addr
5526 || (expecting_tls_get_addr == 1
5527 && !sec->has_tls_get_addr_call))
5528 continue;
5529
5530 if (rel + 1 < relend
5531 && branch_reloc_hash_match (ibfd, rel + 1,
5532 htab->tls_get_addr))
5533 continue;
5534
5535 /* Uh oh, we didn't find the expected call. We
5536 could just mark this symbol to exclude it
5537 from tls optimization but it's safer to skip
5538 the entire optimization. */
5539 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5540 "TLS optimization disabled\n"),
5541 ibfd, sec, rel->r_offset);
5542 if (elf_section_data (sec)->relocs != relstart)
5543 free (relstart);
5544 return TRUE;
5545 }
5546
5547 if (expecting_tls_get_addr)
5548 {
5549 struct plt_entry *ent;
5550 bfd_vma addend = 0;
5551
5552 if (bfd_link_pic (info)
5553 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5554 addend = rel[1].r_addend;
5555 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5556 got2, addend);
5557 if (ent != NULL && ent->plt.refcount > 0)
5558 ent->plt.refcount -= 1;
5559
5560 if (expecting_tls_get_addr == 2)
5561 continue;
5562 }
5563
5564 if (h != NULL)
5565 {
5566 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5567 got_count = &h->got.refcount;
5568 }
5569 else
5570 {
5571 bfd_signed_vma *lgot_refs;
5572 struct plt_entry **local_plt;
5573 char *lgot_masks;
5574
5575 if (locsyms == NULL)
5576 {
5577 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5578 if (locsyms == NULL)
5579 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5580 symtab_hdr->sh_info,
5581 0, NULL, NULL, NULL);
5582 if (locsyms == NULL)
5583 {
5584 if (elf_section_data (sec)->relocs != relstart)
5585 free (relstart);
5586 return FALSE;
5587 }
5588 }
5589 lgot_refs = elf_local_got_refcounts (ibfd);
5590 if (lgot_refs == NULL)
5591 abort ();
5592 local_plt = (struct plt_entry **)
5593 (lgot_refs + symtab_hdr->sh_info);
5594 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5595 tls_mask = &lgot_masks[r_symndx];
5596 got_count = &lgot_refs[r_symndx];
5597 }
5598
5599 if (tls_set == 0)
5600 {
5601 /* We managed to get rid of a got entry. */
5602 if (*got_count > 0)
5603 *got_count -= 1;
5604 }
5605
5606 *tls_mask |= tls_set;
5607 *tls_mask &= ~tls_clear;
5608 }
5609
5610 if (elf_section_data (sec)->relocs != relstart)
5611 free (relstart);
5612 }
5613
5614 if (locsyms != NULL
5615 && (symtab_hdr->contents != (unsigned char *) locsyms))
5616 {
5617 if (!info->keep_memory)
5618 free (locsyms);
5619 else
5620 symtab_hdr->contents = (unsigned char *) locsyms;
5621 }
5622 }
5623 return TRUE;
5624 }
5625 \f
5626 /* Return true if we have dynamic relocs that apply to read-only sections. */
5627
5628 static bfd_boolean
5629 readonly_dynrelocs (struct elf_link_hash_entry *h)
5630 {
5631 struct elf_dyn_relocs *p;
5632
5633 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5634 {
5635 asection *s = p->sec->output_section;
5636
5637 if (s != NULL
5638 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5639 == (SEC_READONLY | SEC_ALLOC)))
5640 return TRUE;
5641 }
5642 return FALSE;
5643 }
5644
5645 /* Adjust a symbol defined by a dynamic object and referenced by a
5646 regular object. The current definition is in some section of the
5647 dynamic object, but we're not including those sections. We have to
5648 change the definition to something the rest of the link can
5649 understand. */
5650
5651 static bfd_boolean
5652 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5653 struct elf_link_hash_entry *h)
5654 {
5655 struct ppc_elf_link_hash_table *htab;
5656 asection *s;
5657
5658 #ifdef DEBUG
5659 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5660 h->root.root.string);
5661 #endif
5662
5663 /* Make sure we know what is going on here. */
5664 htab = ppc_elf_hash_table (info);
5665 BFD_ASSERT (htab->elf.dynobj != NULL
5666 && (h->needs_plt
5667 || h->type == STT_GNU_IFUNC
5668 || h->u.weakdef != NULL
5669 || (h->def_dynamic
5670 && h->ref_regular
5671 && !h->def_regular)));
5672
5673 /* Deal with function syms. */
5674 if (h->type == STT_FUNC
5675 || h->type == STT_GNU_IFUNC
5676 || h->needs_plt)
5677 {
5678 /* Clear procedure linkage table information for any symbol that
5679 won't need a .plt entry. */
5680 struct plt_entry *ent;
5681 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5682 if (ent->plt.refcount > 0)
5683 break;
5684 if (ent == NULL
5685 || (h->type != STT_GNU_IFUNC
5686 && (SYMBOL_CALLS_LOCAL (info, h)
5687 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5688 && h->root.type == bfd_link_hash_undefweak))))
5689 {
5690 /* A PLT entry is not required/allowed when:
5691
5692 1. We are not using ld.so; because then the PLT entry
5693 can't be set up, so we can't use one. In this case,
5694 ppc_elf_adjust_dynamic_symbol won't even be called.
5695
5696 2. GC has rendered the entry unused.
5697
5698 3. We know for certain that a call to this symbol
5699 will go to this object, or will remain undefined. */
5700 h->plt.plist = NULL;
5701 h->needs_plt = 0;
5702 h->pointer_equality_needed = 0;
5703 }
5704 else
5705 {
5706 /* Taking a function's address in a read/write section
5707 doesn't require us to define the function symbol in the
5708 executable on a plt call stub. A dynamic reloc can
5709 be used instead, giving better runtime performance.
5710 (Calls via that function pointer don't need to bounce
5711 through the plt call stub.) Similarly, use a dynamic
5712 reloc for a weak reference when possible, allowing the
5713 resolution of the symbol to be set at load time rather
5714 than link time. */
5715 if ((h->pointer_equality_needed
5716 || (!h->ref_regular_nonweak && h->non_got_ref))
5717 && !htab->is_vxworks
5718 && !ppc_elf_hash_entry (h)->has_sda_refs
5719 && !readonly_dynrelocs (h))
5720 {
5721 h->pointer_equality_needed = 0;
5722 /* After adjust_dynamic_symbol, non_got_ref set in the
5723 non-pic case means that dyn_relocs for this symbol
5724 should be discarded. */
5725 h->non_got_ref = 0;
5726 }
5727 }
5728 h->protected_def = 0;
5729 return TRUE;
5730 }
5731 else
5732 h->plt.plist = NULL;
5733
5734 /* If this is a weak symbol, and there is a real definition, the
5735 processor independent code will have arranged for us to see the
5736 real definition first, and we can just use the same value. */
5737 if (h->u.weakdef != NULL)
5738 {
5739 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5740 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5741 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5742 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5743 if (ELIMINATE_COPY_RELOCS)
5744 h->non_got_ref = h->u.weakdef->non_got_ref;
5745 return TRUE;
5746 }
5747
5748 /* This is a reference to a symbol defined by a dynamic object which
5749 is not a function. */
5750
5751 /* If we are creating a shared library, we must presume that the
5752 only references to the symbol are via the global offset table.
5753 For such cases we need not do anything here; the relocations will
5754 be handled correctly by relocate_section. */
5755 if (bfd_link_pic (info))
5756 {
5757 h->protected_def = 0;
5758 return TRUE;
5759 }
5760
5761 /* If there are no references to this symbol that do not use the
5762 GOT, we don't need to generate a copy reloc. */
5763 if (!h->non_got_ref)
5764 {
5765 h->protected_def = 0;
5766 return TRUE;
5767 }
5768
5769 /* Protected variables do not work with .dynbss. The copy in
5770 .dynbss won't be used by the shared library with the protected
5771 definition for the variable. Editing to PIC, or text relocations
5772 are preferable to an incorrect program. */
5773 if (h->protected_def)
5774 {
5775 if (ELIMINATE_COPY_RELOCS
5776 && ppc_elf_hash_entry (h)->has_addr16_ha
5777 && ppc_elf_hash_entry (h)->has_addr16_lo
5778 && htab->params->pic_fixup == 0
5779 && info->disable_target_specific_optimizations <= 1)
5780 htab->params->pic_fixup = 1;
5781 h->non_got_ref = 0;
5782 return TRUE;
5783 }
5784
5785 /* If -z nocopyreloc was given, we won't generate them either. */
5786 if (info->nocopyreloc)
5787 {
5788 h->non_got_ref = 0;
5789 return TRUE;
5790 }
5791
5792 /* If we didn't find any dynamic relocs in read-only sections, then
5793 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5794 We can't do this if there are any small data relocations. This
5795 doesn't work on VxWorks, where we can not have dynamic
5796 relocations (other than copy and jump slot relocations) in an
5797 executable. */
5798 if (ELIMINATE_COPY_RELOCS
5799 && !ppc_elf_hash_entry (h)->has_sda_refs
5800 && !htab->is_vxworks
5801 && !h->def_regular
5802 && !readonly_dynrelocs (h))
5803 {
5804 h->non_got_ref = 0;
5805 return TRUE;
5806 }
5807
5808 /* We must allocate the symbol in our .dynbss section, which will
5809 become part of the .bss section of the executable. There will be
5810 an entry for this symbol in the .dynsym section. The dynamic
5811 object will contain position independent code, so all references
5812 from the dynamic object to this symbol will go through the global
5813 offset table. The dynamic linker will use the .dynsym entry to
5814 determine the address it must put in the global offset table, so
5815 both the dynamic object and the regular object will refer to the
5816 same memory location for the variable.
5817
5818 Of course, if the symbol is referenced using SDAREL relocs, we
5819 must instead allocate it in .sbss. */
5820
5821 if (ppc_elf_hash_entry (h)->has_sda_refs)
5822 s = htab->dynsbss;
5823 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5824 s = htab->elf.sdynrelro;
5825 else
5826 s = htab->elf.sdynbss;
5827 BFD_ASSERT (s != NULL);
5828
5829 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5830 copy the initial value out of the dynamic object and into the
5831 runtime process image. We need to remember the offset into the
5832 .rela.bss section we are going to use. */
5833 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5834 {
5835 asection *srel;
5836
5837 if (ppc_elf_hash_entry (h)->has_sda_refs)
5838 srel = htab->relsbss;
5839 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5840 srel = htab->elf.sreldynrelro;
5841 else
5842 srel = htab->elf.srelbss;
5843 BFD_ASSERT (srel != NULL);
5844 srel->size += sizeof (Elf32_External_Rela);
5845 h->needs_copy = 1;
5846 }
5847
5848 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5849 }
5850 \f
5851 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5852 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5853 specifying the addend on the plt relocation. For -fpic code, the sym
5854 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5855 xxxxxxxx.got2.plt_pic32.<callee>. */
5856
5857 static bfd_boolean
5858 add_stub_sym (struct plt_entry *ent,
5859 struct elf_link_hash_entry *h,
5860 struct bfd_link_info *info)
5861 {
5862 struct elf_link_hash_entry *sh;
5863 size_t len1, len2, len3;
5864 char *name;
5865 const char *stub;
5866 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5867
5868 if (bfd_link_pic (info))
5869 stub = ".plt_pic32.";
5870 else
5871 stub = ".plt_call32.";
5872
5873 len1 = strlen (h->root.root.string);
5874 len2 = strlen (stub);
5875 len3 = 0;
5876 if (ent->sec)
5877 len3 = strlen (ent->sec->name);
5878 name = bfd_malloc (len1 + len2 + len3 + 9);
5879 if (name == NULL)
5880 return FALSE;
5881 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5882 if (ent->sec)
5883 memcpy (name + 8, ent->sec->name, len3);
5884 memcpy (name + 8 + len3, stub, len2);
5885 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5886 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5887 if (sh == NULL)
5888 return FALSE;
5889 if (sh->root.type == bfd_link_hash_new)
5890 {
5891 sh->root.type = bfd_link_hash_defined;
5892 sh->root.u.def.section = htab->glink;
5893 sh->root.u.def.value = ent->glink_offset;
5894 sh->ref_regular = 1;
5895 sh->def_regular = 1;
5896 sh->ref_regular_nonweak = 1;
5897 sh->forced_local = 1;
5898 sh->non_elf = 0;
5899 sh->root.linker_def = 1;
5900 }
5901 return TRUE;
5902 }
5903
5904 /* Allocate NEED contiguous space in .got, and return the offset.
5905 Handles allocation of the got header when crossing 32k. */
5906
5907 static bfd_vma
5908 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5909 {
5910 bfd_vma where;
5911 unsigned int max_before_header;
5912
5913 if (htab->plt_type == PLT_VXWORKS)
5914 {
5915 where = htab->elf.sgot->size;
5916 htab->elf.sgot->size += need;
5917 }
5918 else
5919 {
5920 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5921 if (need <= htab->got_gap)
5922 {
5923 where = max_before_header - htab->got_gap;
5924 htab->got_gap -= need;
5925 }
5926 else
5927 {
5928 if (htab->elf.sgot->size + need > max_before_header
5929 && htab->elf.sgot->size <= max_before_header)
5930 {
5931 htab->got_gap = max_before_header - htab->elf.sgot->size;
5932 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5933 }
5934 where = htab->elf.sgot->size;
5935 htab->elf.sgot->size += need;
5936 }
5937 }
5938 return where;
5939 }
5940
5941 /* If H is undefined weak, make it dynamic if that makes sense. */
5942
5943 static bfd_boolean
5944 ensure_undefweak_dynamic (struct bfd_link_info *info,
5945 struct elf_link_hash_entry *h)
5946 {
5947 struct elf_link_hash_table *htab = elf_hash_table (info);
5948
5949 if (htab->dynamic_sections_created
5950 && info->dynamic_undefined_weak != 0
5951 && h->root.type == bfd_link_hash_undefweak
5952 && h->dynindx == -1
5953 && !h->forced_local
5954 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5955 return bfd_elf_link_record_dynamic_symbol (info, h);
5956 return TRUE;
5957 }
5958
5959 /* Allocate space in associated reloc sections for dynamic relocs. */
5960
5961 static bfd_boolean
5962 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5963 {
5964 struct bfd_link_info *info = inf;
5965 struct ppc_elf_link_hash_entry *eh;
5966 struct ppc_elf_link_hash_table *htab;
5967 struct elf_dyn_relocs *p;
5968 bfd_boolean dyn;
5969
5970 if (h->root.type == bfd_link_hash_indirect)
5971 return TRUE;
5972
5973 htab = ppc_elf_hash_table (info);
5974 eh = (struct ppc_elf_link_hash_entry *) h;
5975 if (eh->elf.got.refcount > 0
5976 || (ELIMINATE_COPY_RELOCS
5977 && !eh->elf.def_regular
5978 && eh->elf.protected_def
5979 && eh->has_addr16_ha
5980 && eh->has_addr16_lo
5981 && htab->params->pic_fixup > 0))
5982 {
5983 unsigned int need;
5984
5985 /* Make sure this symbol is output as a dynamic symbol.
5986 Undefined weak syms won't yet be marked as dynamic. */
5987 if (!ensure_undefweak_dynamic (info, &eh->elf))
5988 return FALSE;
5989
5990 need = 0;
5991 if ((eh->tls_mask & TLS_TLS) != 0)
5992 {
5993 if ((eh->tls_mask & TLS_LD) != 0)
5994 {
5995 if (!eh->elf.def_dynamic)
5996 /* We'll just use htab->tlsld_got.offset. This should
5997 always be the case. It's a little odd if we have
5998 a local dynamic reloc against a non-local symbol. */
5999 htab->tlsld_got.refcount += 1;
6000 else
6001 need += 8;
6002 }
6003 if ((eh->tls_mask & TLS_GD) != 0)
6004 need += 8;
6005 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6006 need += 4;
6007 if ((eh->tls_mask & TLS_DTPREL) != 0)
6008 need += 4;
6009 }
6010 else
6011 need += 4;
6012 if (need == 0)
6013 eh->elf.got.offset = (bfd_vma) -1;
6014 else
6015 {
6016 eh->elf.got.offset = allocate_got (htab, need);
6017 if ((bfd_link_pic (info)
6018 || (htab->elf.dynamic_sections_created
6019 && eh->elf.dynindx != -1
6020 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6021 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6022 || eh->elf.root.type != bfd_link_hash_undefweak))
6023 {
6024 asection *rsec = htab->elf.srelgot;
6025
6026 if (eh->elf.type == STT_GNU_IFUNC)
6027 rsec = htab->elf.irelplt;
6028 /* All the entries we allocated need relocs.
6029 Except LD only needs one. */
6030 if ((eh->tls_mask & TLS_LD) != 0
6031 && eh->elf.def_dynamic)
6032 need -= 4;
6033 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6034 }
6035 }
6036 }
6037 else
6038 eh->elf.got.offset = (bfd_vma) -1;
6039
6040 /* If no dynamic sections we can't have dynamic relocs, except for
6041 IFUNCs which are handled even in static executables. */
6042 if (!htab->elf.dynamic_sections_created
6043 && h->type != STT_GNU_IFUNC)
6044 eh->dyn_relocs = NULL;
6045
6046 if (eh->dyn_relocs == NULL)
6047 ;
6048
6049 /* In the shared -Bsymbolic case, discard space allocated for
6050 dynamic pc-relative relocs against symbols which turn out to be
6051 defined in regular objects. For the normal shared case, discard
6052 space for relocs that have become local due to symbol visibility
6053 changes. */
6054 else if (bfd_link_pic (info))
6055 {
6056 /* Discard relocs on undefined symbols that must be local. */
6057 if (h->root.type == bfd_link_hash_undefined
6058 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6059 eh->dyn_relocs = NULL;
6060
6061 /* Also discard relocs on undefined weak syms with non-default
6062 visibility, or when dynamic_undefined_weak says so. */
6063 else if (h->root.type == bfd_link_hash_undefweak
6064 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6065 || info->dynamic_undefined_weak == 0))
6066 eh->dyn_relocs = NULL;
6067
6068 /* Relocs that use pc_count are those that appear on a call insn,
6069 or certain REL relocs (see must_be_dyn_reloc) that can be
6070 generated via assembly. We want calls to protected symbols to
6071 resolve directly to the function rather than going via the plt.
6072 If people want function pointer comparisons to work as expected
6073 then they should avoid writing weird assembly. */
6074 else if (SYMBOL_CALLS_LOCAL (info, h))
6075 {
6076 struct elf_dyn_relocs **pp;
6077
6078 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6079 {
6080 p->count -= p->pc_count;
6081 p->pc_count = 0;
6082 if (p->count == 0)
6083 *pp = p->next;
6084 else
6085 pp = &p->next;
6086 }
6087 }
6088
6089 if (htab->is_vxworks)
6090 {
6091 struct elf_dyn_relocs **pp;
6092
6093 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6094 {
6095 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6096 *pp = p->next;
6097 else
6098 pp = &p->next;
6099 }
6100 }
6101
6102 if (eh->dyn_relocs != NULL)
6103 {
6104 /* Make sure undefined weak symbols are output as a dynamic
6105 symbol in PIEs. */
6106 if (!ensure_undefweak_dynamic (info, h))
6107 return FALSE;
6108 }
6109 }
6110 else if (ELIMINATE_COPY_RELOCS)
6111 {
6112 /* For the non-pic case, discard space for relocs against
6113 symbols which turn out to need copy relocs or are not
6114 dynamic. */
6115 if (!h->non_got_ref
6116 && !h->def_regular
6117 && !(h->protected_def
6118 && eh->has_addr16_ha
6119 && eh->has_addr16_lo
6120 && htab->params->pic_fixup > 0))
6121 {
6122 /* Make sure this symbol is output as a dynamic symbol.
6123 Undefined weak syms won't yet be marked as dynamic. */
6124 if (!ensure_undefweak_dynamic (info, h))
6125 return FALSE;
6126
6127 if (h->dynindx == -1)
6128 eh->dyn_relocs = NULL;
6129 }
6130 else
6131 eh->dyn_relocs = NULL;
6132 }
6133
6134 /* Allocate space. */
6135 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6136 {
6137 asection *sreloc = elf_section_data (p->sec)->sreloc;
6138 if (eh->elf.type == STT_GNU_IFUNC)
6139 sreloc = htab->elf.irelplt;
6140 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6141 }
6142
6143 /* Handle PLT relocs. Done last, after dynindx has settled. */
6144 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6145 if (dyn || h->type == STT_GNU_IFUNC)
6146 {
6147 struct plt_entry *ent;
6148 bfd_boolean doneone = FALSE;
6149 bfd_vma plt_offset = 0, glink_offset = 0;
6150
6151 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6152 if (ent->plt.refcount > 0)
6153 {
6154 asection *s = htab->elf.splt;
6155
6156 if (!dyn)
6157 s = htab->elf.iplt;
6158
6159 if (htab->plt_type == PLT_NEW || !dyn)
6160 {
6161 if (!doneone)
6162 {
6163 plt_offset = s->size;
6164 s->size += 4;
6165 }
6166 ent->plt.offset = plt_offset;
6167
6168 s = htab->glink;
6169 if (!doneone || bfd_link_pic (info))
6170 {
6171 glink_offset = s->size;
6172 s->size += GLINK_ENTRY_SIZE;
6173 if (h == htab->tls_get_addr
6174 && !htab->params->no_tls_get_addr_opt)
6175 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6176 }
6177 if (!doneone
6178 && !bfd_link_pic (info)
6179 && h->def_dynamic
6180 && !h->def_regular)
6181 {
6182 h->root.u.def.section = s;
6183 h->root.u.def.value = glink_offset;
6184 }
6185 ent->glink_offset = glink_offset;
6186
6187 if (htab->params->emit_stub_syms
6188 && !add_stub_sym (ent, h, info))
6189 return FALSE;
6190 }
6191 else
6192 {
6193 if (!doneone)
6194 {
6195 /* If this is the first .plt entry, make room
6196 for the special first entry. */
6197 if (s->size == 0)
6198 s->size += htab->plt_initial_entry_size;
6199
6200 /* The PowerPC PLT is actually composed of two
6201 parts, the first part is 2 words (for a load
6202 and a jump), and then there is a remaining
6203 word available at the end. */
6204 plt_offset = (htab->plt_initial_entry_size
6205 + (htab->plt_slot_size
6206 * ((s->size
6207 - htab->plt_initial_entry_size)
6208 / htab->plt_entry_size)));
6209
6210 /* If this symbol is not defined in a regular
6211 file, and we are not generating a shared
6212 library, then set the symbol to this location
6213 in the .plt. This is to avoid text
6214 relocations, and is required to make
6215 function pointers compare as equal between
6216 the normal executable and the shared library. */
6217 if (! bfd_link_pic (info)
6218 && h->def_dynamic
6219 && !h->def_regular)
6220 {
6221 h->root.u.def.section = s;
6222 h->root.u.def.value = plt_offset;
6223 }
6224
6225 /* Make room for this entry. */
6226 s->size += htab->plt_entry_size;
6227 /* After the 8192nd entry, room for two entries
6228 is allocated. */
6229 if (htab->plt_type == PLT_OLD
6230 && (s->size - htab->plt_initial_entry_size)
6231 / htab->plt_entry_size
6232 > PLT_NUM_SINGLE_ENTRIES)
6233 s->size += htab->plt_entry_size;
6234 }
6235 ent->plt.offset = plt_offset;
6236 }
6237
6238 /* We also need to make an entry in the .rela.plt section. */
6239 if (!doneone)
6240 {
6241 if (!dyn)
6242 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6243 else
6244 {
6245 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6246
6247 if (htab->plt_type == PLT_VXWORKS)
6248 {
6249 /* Allocate space for the unloaded relocations. */
6250 if (!bfd_link_pic (info)
6251 && htab->elf.dynamic_sections_created)
6252 {
6253 if (ent->plt.offset
6254 == (bfd_vma) htab->plt_initial_entry_size)
6255 {
6256 htab->srelplt2->size
6257 += (sizeof (Elf32_External_Rela)
6258 * VXWORKS_PLTRESOLVE_RELOCS);
6259 }
6260
6261 htab->srelplt2->size
6262 += (sizeof (Elf32_External_Rela)
6263 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6264 }
6265
6266 /* Every PLT entry has an associated GOT entry in
6267 .got.plt. */
6268 htab->elf.sgotplt->size += 4;
6269 }
6270 }
6271 doneone = TRUE;
6272 }
6273 }
6274 else
6275 ent->plt.offset = (bfd_vma) -1;
6276
6277 if (!doneone)
6278 {
6279 h->plt.plist = NULL;
6280 h->needs_plt = 0;
6281 }
6282 }
6283 else
6284 {
6285 h->plt.plist = NULL;
6286 h->needs_plt = 0;
6287 }
6288
6289 return TRUE;
6290 }
6291
6292 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6293 read-only sections. */
6294
6295 static bfd_boolean
6296 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6297 {
6298 if (h->root.type == bfd_link_hash_indirect)
6299 return TRUE;
6300
6301 if (readonly_dynrelocs (h))
6302 {
6303 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6304
6305 /* Not an error, just cut short the traversal. */
6306 return FALSE;
6307 }
6308 return TRUE;
6309 }
6310
6311 static const unsigned char glink_eh_frame_cie[] =
6312 {
6313 0, 0, 0, 16, /* length. */
6314 0, 0, 0, 0, /* id. */
6315 1, /* CIE version. */
6316 'z', 'R', 0, /* Augmentation string. */
6317 4, /* Code alignment. */
6318 0x7c, /* Data alignment. */
6319 65, /* RA reg. */
6320 1, /* Augmentation size. */
6321 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6322 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6323 };
6324
6325 /* Set the sizes of the dynamic sections. */
6326
6327 static bfd_boolean
6328 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6329 struct bfd_link_info *info)
6330 {
6331 struct ppc_elf_link_hash_table *htab;
6332 asection *s;
6333 bfd_boolean relocs;
6334 bfd *ibfd;
6335
6336 #ifdef DEBUG
6337 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6338 #endif
6339
6340 htab = ppc_elf_hash_table (info);
6341 BFD_ASSERT (htab->elf.dynobj != NULL);
6342
6343 if (elf_hash_table (info)->dynamic_sections_created)
6344 {
6345 /* Set the contents of the .interp section to the interpreter. */
6346 if (bfd_link_executable (info) && !info->nointerp)
6347 {
6348 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6349 BFD_ASSERT (s != NULL);
6350 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6351 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6352 }
6353 }
6354
6355 if (htab->plt_type == PLT_OLD)
6356 htab->got_header_size = 16;
6357 else if (htab->plt_type == PLT_NEW)
6358 htab->got_header_size = 12;
6359
6360 /* Set up .got offsets for local syms, and space for local dynamic
6361 relocs. */
6362 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6363 {
6364 bfd_signed_vma *local_got;
6365 bfd_signed_vma *end_local_got;
6366 struct plt_entry **local_plt;
6367 struct plt_entry **end_local_plt;
6368 char *lgot_masks;
6369 bfd_size_type locsymcount;
6370 Elf_Internal_Shdr *symtab_hdr;
6371
6372 if (!is_ppc_elf (ibfd))
6373 continue;
6374
6375 for (s = ibfd->sections; s != NULL; s = s->next)
6376 {
6377 struct ppc_dyn_relocs *p;
6378
6379 for (p = ((struct ppc_dyn_relocs *)
6380 elf_section_data (s)->local_dynrel);
6381 p != NULL;
6382 p = p->next)
6383 {
6384 if (!bfd_is_abs_section (p->sec)
6385 && bfd_is_abs_section (p->sec->output_section))
6386 {
6387 /* Input section has been discarded, either because
6388 it is a copy of a linkonce section or due to
6389 linker script /DISCARD/, so we'll be discarding
6390 the relocs too. */
6391 }
6392 else if (htab->is_vxworks
6393 && strcmp (p->sec->output_section->name,
6394 ".tls_vars") == 0)
6395 {
6396 /* Relocations in vxworks .tls_vars sections are
6397 handled specially by the loader. */
6398 }
6399 else if (p->count != 0)
6400 {
6401 asection *sreloc = elf_section_data (p->sec)->sreloc;
6402 if (p->ifunc)
6403 sreloc = htab->elf.irelplt;
6404 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6405 if ((p->sec->output_section->flags
6406 & (SEC_READONLY | SEC_ALLOC))
6407 == (SEC_READONLY | SEC_ALLOC))
6408 info->flags |= DF_TEXTREL;
6409 }
6410 }
6411 }
6412
6413 local_got = elf_local_got_refcounts (ibfd);
6414 if (!local_got)
6415 continue;
6416
6417 symtab_hdr = &elf_symtab_hdr (ibfd);
6418 locsymcount = symtab_hdr->sh_info;
6419 end_local_got = local_got + locsymcount;
6420 local_plt = (struct plt_entry **) end_local_got;
6421 end_local_plt = local_plt + locsymcount;
6422 lgot_masks = (char *) end_local_plt;
6423
6424 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6425 if (*local_got > 0)
6426 {
6427 unsigned int need = 0;
6428 if ((*lgot_masks & TLS_TLS) != 0)
6429 {
6430 if ((*lgot_masks & TLS_GD) != 0)
6431 need += 8;
6432 if ((*lgot_masks & TLS_LD) != 0)
6433 htab->tlsld_got.refcount += 1;
6434 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6435 need += 4;
6436 if ((*lgot_masks & TLS_DTPREL) != 0)
6437 need += 4;
6438 }
6439 else
6440 need += 4;
6441 if (need == 0)
6442 *local_got = (bfd_vma) -1;
6443 else
6444 {
6445 *local_got = allocate_got (htab, need);
6446 if (bfd_link_pic (info))
6447 {
6448 asection *srel = htab->elf.srelgot;
6449 if ((*lgot_masks & PLT_IFUNC) != 0)
6450 srel = htab->elf.irelplt;
6451 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6452 }
6453 }
6454 }
6455 else
6456 *local_got = (bfd_vma) -1;
6457
6458 if (htab->is_vxworks)
6459 continue;
6460
6461 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6462 for (; local_plt < end_local_plt; ++local_plt)
6463 {
6464 struct plt_entry *ent;
6465 bfd_boolean doneone = FALSE;
6466 bfd_vma plt_offset = 0, glink_offset = 0;
6467
6468 for (ent = *local_plt; ent != NULL; ent = ent->next)
6469 if (ent->plt.refcount > 0)
6470 {
6471 s = htab->elf.iplt;
6472
6473 if (!doneone)
6474 {
6475 plt_offset = s->size;
6476 s->size += 4;
6477 }
6478 ent->plt.offset = plt_offset;
6479
6480 s = htab->glink;
6481 if (!doneone || bfd_link_pic (info))
6482 {
6483 glink_offset = s->size;
6484 s->size += GLINK_ENTRY_SIZE;
6485 }
6486 ent->glink_offset = glink_offset;
6487
6488 if (!doneone)
6489 {
6490 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6491 doneone = TRUE;
6492 }
6493 }
6494 else
6495 ent->plt.offset = (bfd_vma) -1;
6496 }
6497 }
6498
6499 /* Allocate space for global sym dynamic relocs. */
6500 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6501
6502 if (htab->tlsld_got.refcount > 0)
6503 {
6504 htab->tlsld_got.offset = allocate_got (htab, 8);
6505 if (bfd_link_pic (info))
6506 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6507 }
6508 else
6509 htab->tlsld_got.offset = (bfd_vma) -1;
6510
6511 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6512 {
6513 unsigned int g_o_t = 32768;
6514
6515 /* If we haven't allocated the header, do so now. When we get here,
6516 for old plt/got the got size will be 0 to 32764 (not allocated),
6517 or 32780 to 65536 (header allocated). For new plt/got, the
6518 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6519 if (htab->elf.sgot->size <= 32768)
6520 {
6521 g_o_t = htab->elf.sgot->size;
6522 if (htab->plt_type == PLT_OLD)
6523 g_o_t += 4;
6524 htab->elf.sgot->size += htab->got_header_size;
6525 }
6526
6527 htab->elf.hgot->root.u.def.value = g_o_t;
6528 }
6529 if (bfd_link_pic (info))
6530 {
6531 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6532
6533 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6534 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6535 }
6536 if (info->emitrelocations)
6537 {
6538 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6539
6540 if (sda != NULL && sda->ref_regular)
6541 sda->root.u.def.section->flags |= SEC_KEEP;
6542 sda = htab->sdata[1].sym;
6543 if (sda != NULL && sda->ref_regular)
6544 sda->root.u.def.section->flags |= SEC_KEEP;
6545 }
6546
6547 if (htab->glink != NULL
6548 && htab->glink->size != 0
6549 && htab->elf.dynamic_sections_created)
6550 {
6551 htab->glink_pltresolve = htab->glink->size;
6552 /* Space for the branch table. ??? We don't need entries for
6553 non-dynamic symbols in this table. This case can arise with
6554 static ifuncs or forced local ifuncs. */
6555 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6556 /* Pad out to align the start of PLTresolve. */
6557 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6558 ? 63 : 15);
6559 htab->glink->size += GLINK_PLTRESOLVE;
6560
6561 if (htab->params->emit_stub_syms)
6562 {
6563 struct elf_link_hash_entry *sh;
6564 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6565 TRUE, FALSE, FALSE);
6566 if (sh == NULL)
6567 return FALSE;
6568 if (sh->root.type == bfd_link_hash_new)
6569 {
6570 sh->root.type = bfd_link_hash_defined;
6571 sh->root.u.def.section = htab->glink;
6572 sh->root.u.def.value = htab->glink_pltresolve;
6573 sh->ref_regular = 1;
6574 sh->def_regular = 1;
6575 sh->ref_regular_nonweak = 1;
6576 sh->forced_local = 1;
6577 sh->non_elf = 0;
6578 sh->root.linker_def = 1;
6579 }
6580 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6581 TRUE, FALSE, FALSE);
6582 if (sh == NULL)
6583 return FALSE;
6584 if (sh->root.type == bfd_link_hash_new)
6585 {
6586 sh->root.type = bfd_link_hash_defined;
6587 sh->root.u.def.section = htab->glink;
6588 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6589 sh->ref_regular = 1;
6590 sh->def_regular = 1;
6591 sh->ref_regular_nonweak = 1;
6592 sh->forced_local = 1;
6593 sh->non_elf = 0;
6594 sh->root.linker_def = 1;
6595 }
6596 }
6597 }
6598
6599 if (htab->glink != NULL
6600 && htab->glink->size != 0
6601 && htab->glink_eh_frame != NULL
6602 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6603 && _bfd_elf_eh_frame_present (info))
6604 {
6605 s = htab->glink_eh_frame;
6606 s->size = sizeof (glink_eh_frame_cie) + 20;
6607 if (bfd_link_pic (info))
6608 {
6609 s->size += 4;
6610 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6611 s->size += 4;
6612 }
6613 }
6614
6615 /* We've now determined the sizes of the various dynamic sections.
6616 Allocate memory for them. */
6617 relocs = FALSE;
6618 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6619 {
6620 bfd_boolean strip_section = TRUE;
6621
6622 if ((s->flags & SEC_LINKER_CREATED) == 0)
6623 continue;
6624
6625 if (s == htab->elf.splt
6626 || s == htab->elf.sgot)
6627 {
6628 /* We'd like to strip these sections if they aren't needed, but if
6629 we've exported dynamic symbols from them we must leave them.
6630 It's too late to tell BFD to get rid of the symbols. */
6631 if (htab->elf.hplt != NULL)
6632 strip_section = FALSE;
6633 /* Strip this section if we don't need it; see the
6634 comment below. */
6635 }
6636 else if (s == htab->elf.iplt
6637 || s == htab->glink
6638 || s == htab->glink_eh_frame
6639 || s == htab->elf.sgotplt
6640 || s == htab->sbss
6641 || s == htab->elf.sdynbss
6642 || s == htab->elf.sdynrelro
6643 || s == htab->dynsbss)
6644 {
6645 /* Strip these too. */
6646 }
6647 else if (s == htab->sdata[0].section
6648 || s == htab->sdata[1].section)
6649 {
6650 strip_section = (s->flags & SEC_KEEP) == 0;
6651 }
6652 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6653 ".rela"))
6654 {
6655 if (s->size != 0)
6656 {
6657 /* Remember whether there are any relocation sections. */
6658 relocs = TRUE;
6659
6660 /* We use the reloc_count field as a counter if we need
6661 to copy relocs into the output file. */
6662 s->reloc_count = 0;
6663 }
6664 }
6665 else
6666 {
6667 /* It's not one of our sections, so don't allocate space. */
6668 continue;
6669 }
6670
6671 if (s->size == 0 && strip_section)
6672 {
6673 /* If we don't need this section, strip it from the
6674 output file. This is mostly to handle .rela.bss and
6675 .rela.plt. We must create both sections in
6676 create_dynamic_sections, because they must be created
6677 before the linker maps input sections to output
6678 sections. The linker does that before
6679 adjust_dynamic_symbol is called, and it is that
6680 function which decides whether anything needs to go
6681 into these sections. */
6682 s->flags |= SEC_EXCLUDE;
6683 continue;
6684 }
6685
6686 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6687 continue;
6688
6689 /* Allocate memory for the section contents. */
6690 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6691 if (s->contents == NULL)
6692 return FALSE;
6693 }
6694
6695 if (htab->elf.dynamic_sections_created)
6696 {
6697 /* Add some entries to the .dynamic section. We fill in the
6698 values later, in ppc_elf_finish_dynamic_sections, but we
6699 must add the entries now so that we get the correct size for
6700 the .dynamic section. The DT_DEBUG entry is filled in by the
6701 dynamic linker and used by the debugger. */
6702 #define add_dynamic_entry(TAG, VAL) \
6703 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6704
6705 if (bfd_link_executable (info))
6706 {
6707 if (!add_dynamic_entry (DT_DEBUG, 0))
6708 return FALSE;
6709 }
6710
6711 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6712 {
6713 if (!add_dynamic_entry (DT_PLTGOT, 0)
6714 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6715 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6716 || !add_dynamic_entry (DT_JMPREL, 0))
6717 return FALSE;
6718 }
6719
6720 if (htab->plt_type == PLT_NEW
6721 && htab->glink != NULL
6722 && htab->glink->size != 0)
6723 {
6724 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6725 return FALSE;
6726 if (!htab->params->no_tls_get_addr_opt
6727 && htab->tls_get_addr != NULL
6728 && htab->tls_get_addr->plt.plist != NULL
6729 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6730 return FALSE;
6731 }
6732
6733 if (relocs)
6734 {
6735 if (!add_dynamic_entry (DT_RELA, 0)
6736 || !add_dynamic_entry (DT_RELASZ, 0)
6737 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6738 return FALSE;
6739 }
6740
6741 /* If any dynamic relocs apply to a read-only section, then we
6742 need a DT_TEXTREL entry. */
6743 if ((info->flags & DF_TEXTREL) == 0)
6744 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6745 info);
6746
6747 if ((info->flags & DF_TEXTREL) != 0)
6748 {
6749 if (!add_dynamic_entry (DT_TEXTREL, 0))
6750 return FALSE;
6751 }
6752 if (htab->is_vxworks
6753 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6754 return FALSE;
6755 }
6756 #undef add_dynamic_entry
6757
6758 if (htab->glink_eh_frame != NULL
6759 && htab->glink_eh_frame->contents != NULL)
6760 {
6761 unsigned char *p = htab->glink_eh_frame->contents;
6762 bfd_vma val;
6763
6764 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6765 /* CIE length (rewrite in case little-endian). */
6766 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6767 p += sizeof (glink_eh_frame_cie);
6768 /* FDE length. */
6769 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6770 bfd_put_32 (htab->elf.dynobj, val, p);
6771 p += 4;
6772 /* CIE pointer. */
6773 val = p - htab->glink_eh_frame->contents;
6774 bfd_put_32 (htab->elf.dynobj, val, p);
6775 p += 4;
6776 /* Offset to .glink. Set later. */
6777 p += 4;
6778 /* .glink size. */
6779 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6780 p += 4;
6781 /* Augmentation. */
6782 p += 1;
6783
6784 if (bfd_link_pic (info)
6785 && htab->elf.dynamic_sections_created)
6786 {
6787 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6788 if (adv < 64)
6789 *p++ = DW_CFA_advance_loc + adv;
6790 else if (adv < 256)
6791 {
6792 *p++ = DW_CFA_advance_loc1;
6793 *p++ = adv;
6794 }
6795 else if (adv < 65536)
6796 {
6797 *p++ = DW_CFA_advance_loc2;
6798 bfd_put_16 (htab->elf.dynobj, adv, p);
6799 p += 2;
6800 }
6801 else
6802 {
6803 *p++ = DW_CFA_advance_loc4;
6804 bfd_put_32 (htab->elf.dynobj, adv, p);
6805 p += 4;
6806 }
6807 *p++ = DW_CFA_register;
6808 *p++ = 65;
6809 p++;
6810 *p++ = DW_CFA_advance_loc + 4;
6811 *p++ = DW_CFA_restore_extended;
6812 *p++ = 65;
6813 }
6814 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6815 == htab->glink_eh_frame->size);
6816 }
6817
6818 return TRUE;
6819 }
6820
6821 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6822 if it looks like nothing is using them. */
6823
6824 static void
6825 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6826 {
6827 struct elf_link_hash_entry *sda = lsect->sym;
6828
6829 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6830 {
6831 asection *s;
6832
6833 s = bfd_get_section_by_name (output_bfd, lsect->name);
6834 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6835 {
6836 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6837 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6838 {
6839 sda->def_regular = 0;
6840 /* This is somewhat magic. See elf_link_output_extsym. */
6841 sda->ref_dynamic = 1;
6842 sda->forced_local = 0;
6843 }
6844 }
6845 }
6846 }
6847
6848 void
6849 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6850 {
6851 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6852
6853 if (htab != NULL)
6854 {
6855 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6856 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6857 }
6858 }
6859
6860
6861 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6862
6863 static bfd_boolean
6864 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6865 {
6866 if (h->plt.plist != NULL
6867 && !h->def_regular
6868 && (!h->pointer_equality_needed
6869 || !h->ref_regular_nonweak))
6870 return FALSE;
6871
6872 return _bfd_elf_hash_symbol (h);
6873 }
6874 \f
6875 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6876
6877 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6878 used for some functions that are allowed to break the ABI). */
6879 static const int shared_stub_entry[] =
6880 {
6881 0x7c0802a6, /* mflr 0 */
6882 0x429f0005, /* bcl 20, 31, .Lxxx */
6883 0x7d8802a6, /* mflr 12 */
6884 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6885 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6886 0x7c0803a6, /* mtlr 0 */
6887 0x7d8903a6, /* mtctr 12 */
6888 0x4e800420, /* bctr */
6889 };
6890
6891 static const int stub_entry[] =
6892 {
6893 0x3d800000, /* lis 12,xxx@ha */
6894 0x398c0000, /* addi 12,12,xxx@l */
6895 0x7d8903a6, /* mtctr 12 */
6896 0x4e800420, /* bctr */
6897 };
6898
6899 struct ppc_elf_relax_info
6900 {
6901 unsigned int workaround_size;
6902 unsigned int picfixup_size;
6903 };
6904
6905 /* This function implements long branch trampolines, and the ppc476
6906 icache bug workaround. Any section needing trampolines or patch
6907 space for the workaround has its size extended so that we can
6908 add trampolines at the end of the section. */
6909
6910 static bfd_boolean
6911 ppc_elf_relax_section (bfd *abfd,
6912 asection *isec,
6913 struct bfd_link_info *link_info,
6914 bfd_boolean *again)
6915 {
6916 struct one_branch_fixup
6917 {
6918 struct one_branch_fixup *next;
6919 asection *tsec;
6920 /* Final link, can use the symbol offset. For a
6921 relocatable link we use the symbol's index. */
6922 bfd_vma toff;
6923 bfd_vma trampoff;
6924 };
6925
6926 Elf_Internal_Shdr *symtab_hdr;
6927 bfd_byte *contents = NULL;
6928 Elf_Internal_Sym *isymbuf = NULL;
6929 Elf_Internal_Rela *internal_relocs = NULL;
6930 Elf_Internal_Rela *irel, *irelend = NULL;
6931 struct one_branch_fixup *branch_fixups = NULL;
6932 struct ppc_elf_relax_info *relax_info = NULL;
6933 unsigned changes = 0;
6934 bfd_boolean workaround_change;
6935 struct ppc_elf_link_hash_table *htab;
6936 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6937 asection *got2;
6938 bfd_boolean maybe_pasted;
6939
6940 *again = FALSE;
6941
6942 /* No need to do anything with non-alloc or non-code sections. */
6943 if ((isec->flags & SEC_ALLOC) == 0
6944 || (isec->flags & SEC_CODE) == 0
6945 || (isec->flags & SEC_LINKER_CREATED) != 0
6946 || isec->size < 4)
6947 return TRUE;
6948
6949 /* We cannot represent the required PIC relocs in the output, so don't
6950 do anything. The linker doesn't support mixing -shared and -r
6951 anyway. */
6952 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6953 return TRUE;
6954
6955 htab = ppc_elf_hash_table (link_info);
6956 if (htab == NULL)
6957 return TRUE;
6958
6959 isec->size = (isec->size + 3) & -4;
6960 if (isec->rawsize == 0)
6961 isec->rawsize = isec->size;
6962 trampbase = isec->size;
6963
6964 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6965 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6966 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6967
6968 if (htab->params->ppc476_workaround
6969 || htab->params->pic_fixup > 0)
6970 {
6971 if (elf_section_data (isec)->sec_info == NULL)
6972 {
6973 elf_section_data (isec)->sec_info
6974 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6975 if (elf_section_data (isec)->sec_info == NULL)
6976 return FALSE;
6977 }
6978 relax_info = elf_section_data (isec)->sec_info;
6979 trampbase -= relax_info->workaround_size;
6980 }
6981
6982 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6983 || strcmp (isec->output_section->name, ".fini") == 0);
6984 /* Space for a branch around any trampolines. */
6985 trampoff = trampbase;
6986 if (maybe_pasted && trampbase == isec->rawsize)
6987 trampoff += 4;
6988
6989 symtab_hdr = &elf_symtab_hdr (abfd);
6990 picfixup_size = 0;
6991 if (htab->params->branch_trampolines
6992 || htab->params->pic_fixup > 0)
6993 {
6994 /* Get a copy of the native relocations. */
6995 if (isec->reloc_count != 0)
6996 {
6997 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6998 link_info->keep_memory);
6999 if (internal_relocs == NULL)
7000 goto error_return;
7001 }
7002
7003 got2 = bfd_get_section_by_name (abfd, ".got2");
7004
7005 irelend = internal_relocs + isec->reloc_count;
7006 for (irel = internal_relocs; irel < irelend; irel++)
7007 {
7008 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7009 bfd_vma toff, roff;
7010 asection *tsec;
7011 struct one_branch_fixup *f;
7012 size_t insn_offset = 0;
7013 bfd_vma max_branch_offset = 0, val;
7014 bfd_byte *hit_addr;
7015 unsigned long t0;
7016 struct elf_link_hash_entry *h;
7017 struct plt_entry **plist;
7018 unsigned char sym_type;
7019
7020 switch (r_type)
7021 {
7022 case R_PPC_REL24:
7023 case R_PPC_LOCAL24PC:
7024 case R_PPC_PLTREL24:
7025 max_branch_offset = 1 << 25;
7026 break;
7027
7028 case R_PPC_REL14:
7029 case R_PPC_REL14_BRTAKEN:
7030 case R_PPC_REL14_BRNTAKEN:
7031 max_branch_offset = 1 << 15;
7032 break;
7033
7034 case R_PPC_ADDR16_HA:
7035 if (htab->params->pic_fixup > 0)
7036 break;
7037 continue;
7038
7039 default:
7040 continue;
7041 }
7042
7043 /* Get the value of the symbol referred to by the reloc. */
7044 h = NULL;
7045 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7046 {
7047 /* A local symbol. */
7048 Elf_Internal_Sym *isym;
7049
7050 /* Read this BFD's local symbols. */
7051 if (isymbuf == NULL)
7052 {
7053 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7054 if (isymbuf == NULL)
7055 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7056 symtab_hdr->sh_info, 0,
7057 NULL, NULL, NULL);
7058 if (isymbuf == 0)
7059 goto error_return;
7060 }
7061 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7062 if (isym->st_shndx == SHN_UNDEF)
7063 tsec = bfd_und_section_ptr;
7064 else if (isym->st_shndx == SHN_ABS)
7065 tsec = bfd_abs_section_ptr;
7066 else if (isym->st_shndx == SHN_COMMON)
7067 tsec = bfd_com_section_ptr;
7068 else
7069 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7070
7071 toff = isym->st_value;
7072 sym_type = ELF_ST_TYPE (isym->st_info);
7073 }
7074 else
7075 {
7076 /* Global symbol handling. */
7077 unsigned long indx;
7078
7079 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7080 h = elf_sym_hashes (abfd)[indx];
7081
7082 while (h->root.type == bfd_link_hash_indirect
7083 || h->root.type == bfd_link_hash_warning)
7084 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7085
7086 if (h->root.type == bfd_link_hash_defined
7087 || h->root.type == bfd_link_hash_defweak)
7088 {
7089 tsec = h->root.u.def.section;
7090 toff = h->root.u.def.value;
7091 }
7092 else if (h->root.type == bfd_link_hash_undefined
7093 || h->root.type == bfd_link_hash_undefweak)
7094 {
7095 tsec = bfd_und_section_ptr;
7096 toff = bfd_link_relocatable (link_info) ? indx : 0;
7097 }
7098 else
7099 continue;
7100
7101 /* If this branch is to __tls_get_addr then we may later
7102 optimise away the call. We won't be needing a long-
7103 branch stub in that case. */
7104 if (bfd_link_executable (link_info)
7105 && h == htab->tls_get_addr
7106 && irel != internal_relocs)
7107 {
7108 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7109 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7110 unsigned int tls_mask = 0;
7111
7112 /* The previous reloc should be one of R_PPC_TLSGD or
7113 R_PPC_TLSLD, or for older object files, a reloc
7114 on the __tls_get_addr arg setup insn. Get tls
7115 mask bits from the symbol on that reloc. */
7116 if (t_symndx < symtab_hdr->sh_info)
7117 {
7118 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7119
7120 if (local_got_offsets != NULL)
7121 {
7122 struct plt_entry **local_plt = (struct plt_entry **)
7123 (local_got_offsets + symtab_hdr->sh_info);
7124 char *lgot_masks = (char *)
7125 (local_plt + symtab_hdr->sh_info);
7126 tls_mask = lgot_masks[t_symndx];
7127 }
7128 }
7129 else
7130 {
7131 struct elf_link_hash_entry *th
7132 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7133
7134 while (th->root.type == bfd_link_hash_indirect
7135 || th->root.type == bfd_link_hash_warning)
7136 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7137
7138 tls_mask
7139 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7140 }
7141
7142 /* The mask bits tell us if the call will be
7143 optimised away. */
7144 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7145 && (t_rtype == R_PPC_TLSGD
7146 || t_rtype == R_PPC_GOT_TLSGD16
7147 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7148 continue;
7149 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7150 && (t_rtype == R_PPC_TLSLD
7151 || t_rtype == R_PPC_GOT_TLSLD16
7152 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7153 continue;
7154 }
7155
7156 sym_type = h->type;
7157 }
7158
7159 if (r_type == R_PPC_ADDR16_HA)
7160 {
7161 if (h != NULL
7162 && !h->def_regular
7163 && h->protected_def
7164 && ppc_elf_hash_entry (h)->has_addr16_ha
7165 && ppc_elf_hash_entry (h)->has_addr16_lo)
7166 picfixup_size += 12;
7167 continue;
7168 }
7169
7170 /* The condition here under which we call find_plt_ent must
7171 match that in relocate_section. If we call find_plt_ent here
7172 but not in relocate_section, or vice versa, then the branch
7173 destination used here may be incorrect. */
7174 plist = NULL;
7175 if (h != NULL)
7176 {
7177 /* We know is_branch_reloc (r_type) is true. */
7178 if (h->type == STT_GNU_IFUNC
7179 || r_type == R_PPC_PLTREL24)
7180 plist = &h->plt.plist;
7181 }
7182 else if (sym_type == STT_GNU_IFUNC
7183 && elf_local_got_offsets (abfd) != NULL)
7184 {
7185 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7186 struct plt_entry **local_plt = (struct plt_entry **)
7187 (local_got_offsets + symtab_hdr->sh_info);
7188 plist = local_plt + ELF32_R_SYM (irel->r_info);
7189 }
7190 if (plist != NULL)
7191 {
7192 bfd_vma addend = 0;
7193 struct plt_entry *ent;
7194
7195 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7196 addend = irel->r_addend;
7197 ent = find_plt_ent (plist, got2, addend);
7198 if (ent != NULL)
7199 {
7200 if (htab->plt_type == PLT_NEW
7201 || h == NULL
7202 || !htab->elf.dynamic_sections_created
7203 || h->dynindx == -1)
7204 {
7205 tsec = htab->glink;
7206 toff = ent->glink_offset;
7207 }
7208 else
7209 {
7210 tsec = htab->elf.splt;
7211 toff = ent->plt.offset;
7212 }
7213 }
7214 }
7215
7216 /* If the branch and target are in the same section, you have
7217 no hope of adding stubs. We'll error out later should the
7218 branch overflow. */
7219 if (tsec == isec)
7220 continue;
7221
7222 /* There probably isn't any reason to handle symbols in
7223 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7224 attribute for a code section, and we are only looking at
7225 branches. However, implement it correctly here as a
7226 reference for other target relax_section functions. */
7227 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7228 {
7229 /* At this stage in linking, no SEC_MERGE symbol has been
7230 adjusted, so all references to such symbols need to be
7231 passed through _bfd_merged_section_offset. (Later, in
7232 relocate_section, all SEC_MERGE symbols *except* for
7233 section symbols have been adjusted.)
7234
7235 gas may reduce relocations against symbols in SEC_MERGE
7236 sections to a relocation against the section symbol when
7237 the original addend was zero. When the reloc is against
7238 a section symbol we should include the addend in the
7239 offset passed to _bfd_merged_section_offset, since the
7240 location of interest is the original symbol. On the
7241 other hand, an access to "sym+addend" where "sym" is not
7242 a section symbol should not include the addend; Such an
7243 access is presumed to be an offset from "sym"; The
7244 location of interest is just "sym". */
7245 if (sym_type == STT_SECTION)
7246 toff += irel->r_addend;
7247
7248 toff
7249 = _bfd_merged_section_offset (abfd, &tsec,
7250 elf_section_data (tsec)->sec_info,
7251 toff);
7252
7253 if (sym_type != STT_SECTION)
7254 toff += irel->r_addend;
7255 }
7256 /* PLTREL24 addends are special. */
7257 else if (r_type != R_PPC_PLTREL24)
7258 toff += irel->r_addend;
7259
7260 /* Attempted -shared link of non-pic code loses. */
7261 if ((!bfd_link_relocatable (link_info)
7262 && tsec == bfd_und_section_ptr)
7263 || tsec->output_section == NULL
7264 || (tsec->owner != NULL
7265 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7266 continue;
7267
7268 roff = irel->r_offset;
7269
7270 /* If the branch is in range, no need to do anything. */
7271 if (tsec != bfd_und_section_ptr
7272 && (!bfd_link_relocatable (link_info)
7273 /* A relocatable link may have sections moved during
7274 final link, so do not presume they remain in range. */
7275 || tsec->output_section == isec->output_section))
7276 {
7277 bfd_vma symaddr, reladdr;
7278
7279 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7280 reladdr = isec->output_section->vma + isec->output_offset + roff;
7281 if (symaddr - reladdr + max_branch_offset
7282 < 2 * max_branch_offset)
7283 continue;
7284 }
7285
7286 /* Look for an existing fixup to this address. */
7287 for (f = branch_fixups; f ; f = f->next)
7288 if (f->tsec == tsec && f->toff == toff)
7289 break;
7290
7291 if (f == NULL)
7292 {
7293 size_t size;
7294 unsigned long stub_rtype;
7295
7296 val = trampoff - roff;
7297 if (val >= max_branch_offset)
7298 /* Oh dear, we can't reach a trampoline. Don't try to add
7299 one. We'll report an error later. */
7300 continue;
7301
7302 if (bfd_link_pic (link_info))
7303 {
7304 size = 4 * ARRAY_SIZE (shared_stub_entry);
7305 insn_offset = 12;
7306 }
7307 else
7308 {
7309 size = 4 * ARRAY_SIZE (stub_entry);
7310 insn_offset = 0;
7311 }
7312 stub_rtype = R_PPC_RELAX;
7313 if (tsec == htab->elf.splt
7314 || tsec == htab->glink)
7315 {
7316 stub_rtype = R_PPC_RELAX_PLT;
7317 if (r_type == R_PPC_PLTREL24)
7318 stub_rtype = R_PPC_RELAX_PLTREL24;
7319 }
7320
7321 /* Hijack the old relocation. Since we need two
7322 relocations for this use a "composite" reloc. */
7323 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7324 stub_rtype);
7325 irel->r_offset = trampoff + insn_offset;
7326 if (r_type == R_PPC_PLTREL24
7327 && stub_rtype != R_PPC_RELAX_PLTREL24)
7328 irel->r_addend = 0;
7329
7330 /* Record the fixup so we don't do it again this section. */
7331 f = bfd_malloc (sizeof (*f));
7332 f->next = branch_fixups;
7333 f->tsec = tsec;
7334 f->toff = toff;
7335 f->trampoff = trampoff;
7336 branch_fixups = f;
7337
7338 trampoff += size;
7339 changes++;
7340 }
7341 else
7342 {
7343 val = f->trampoff - roff;
7344 if (val >= max_branch_offset)
7345 continue;
7346
7347 /* Nop out the reloc, since we're finalizing things here. */
7348 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7349 }
7350
7351 /* Get the section contents. */
7352 if (contents == NULL)
7353 {
7354 /* Get cached copy if it exists. */
7355 if (elf_section_data (isec)->this_hdr.contents != NULL)
7356 contents = elf_section_data (isec)->this_hdr.contents;
7357 /* Go get them off disk. */
7358 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7359 goto error_return;
7360 }
7361
7362 /* Fix up the existing branch to hit the trampoline. */
7363 hit_addr = contents + roff;
7364 switch (r_type)
7365 {
7366 case R_PPC_REL24:
7367 case R_PPC_LOCAL24PC:
7368 case R_PPC_PLTREL24:
7369 t0 = bfd_get_32 (abfd, hit_addr);
7370 t0 &= ~0x3fffffc;
7371 t0 |= val & 0x3fffffc;
7372 bfd_put_32 (abfd, t0, hit_addr);
7373 break;
7374
7375 case R_PPC_REL14:
7376 case R_PPC_REL14_BRTAKEN:
7377 case R_PPC_REL14_BRNTAKEN:
7378 t0 = bfd_get_32 (abfd, hit_addr);
7379 t0 &= ~0xfffc;
7380 t0 |= val & 0xfffc;
7381 bfd_put_32 (abfd, t0, hit_addr);
7382 break;
7383 }
7384 }
7385
7386 while (branch_fixups != NULL)
7387 {
7388 struct one_branch_fixup *f = branch_fixups;
7389 branch_fixups = branch_fixups->next;
7390 free (f);
7391 }
7392 }
7393
7394 workaround_change = FALSE;
7395 newsize = trampoff;
7396 if (htab->params->ppc476_workaround
7397 && (!bfd_link_relocatable (link_info)
7398 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7399 {
7400 bfd_vma addr, end_addr;
7401 unsigned int crossings;
7402 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7403
7404 addr = isec->output_section->vma + isec->output_offset;
7405 end_addr = addr + trampoff;
7406 addr &= -pagesize;
7407 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7408 if (crossings != 0)
7409 {
7410 /* Keep space aligned, to ensure the patch code itself does
7411 not cross a page. Don't decrease size calculated on a
7412 previous pass as otherwise we might never settle on a layout. */
7413 newsize = 15 - ((end_addr - 1) & 15);
7414 newsize += crossings * 16;
7415 if (relax_info->workaround_size < newsize)
7416 {
7417 relax_info->workaround_size = newsize;
7418 workaround_change = TRUE;
7419 }
7420 /* Ensure relocate_section is called. */
7421 isec->flags |= SEC_RELOC;
7422 }
7423 newsize = trampoff + relax_info->workaround_size;
7424 }
7425
7426 if (htab->params->pic_fixup > 0)
7427 {
7428 picfixup_size -= relax_info->picfixup_size;
7429 if (picfixup_size != 0)
7430 relax_info->picfixup_size += picfixup_size;
7431 newsize += relax_info->picfixup_size;
7432 }
7433
7434 if (changes != 0 || picfixup_size != 0 || workaround_change)
7435 isec->size = newsize;
7436
7437 if (isymbuf != NULL
7438 && symtab_hdr->contents != (unsigned char *) isymbuf)
7439 {
7440 if (! link_info->keep_memory)
7441 free (isymbuf);
7442 else
7443 {
7444 /* Cache the symbols for elf_link_input_bfd. */
7445 symtab_hdr->contents = (unsigned char *) isymbuf;
7446 }
7447 }
7448
7449 if (contents != NULL
7450 && elf_section_data (isec)->this_hdr.contents != contents)
7451 {
7452 if (!changes && !link_info->keep_memory)
7453 free (contents);
7454 else
7455 {
7456 /* Cache the section contents for elf_link_input_bfd. */
7457 elf_section_data (isec)->this_hdr.contents = contents;
7458 }
7459 }
7460
7461 changes += picfixup_size;
7462 if (changes != 0)
7463 {
7464 /* Append sufficient NOP relocs so we can write out relocation
7465 information for the trampolines. */
7466 Elf_Internal_Shdr *rel_hdr;
7467 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7468 * sizeof (*new_relocs));
7469 unsigned ix;
7470
7471 if (!new_relocs)
7472 goto error_return;
7473 memcpy (new_relocs, internal_relocs,
7474 isec->reloc_count * sizeof (*new_relocs));
7475 for (ix = changes; ix--;)
7476 {
7477 irel = new_relocs + ix + isec->reloc_count;
7478
7479 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7480 }
7481 if (internal_relocs != elf_section_data (isec)->relocs)
7482 free (internal_relocs);
7483 elf_section_data (isec)->relocs = new_relocs;
7484 isec->reloc_count += changes;
7485 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7486 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7487 }
7488 else if (internal_relocs != NULL
7489 && elf_section_data (isec)->relocs != internal_relocs)
7490 free (internal_relocs);
7491
7492 *again = changes != 0 || workaround_change;
7493 return TRUE;
7494
7495 error_return:
7496 while (branch_fixups != NULL)
7497 {
7498 struct one_branch_fixup *f = branch_fixups;
7499 branch_fixups = branch_fixups->next;
7500 free (f);
7501 }
7502 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7503 free (isymbuf);
7504 if (contents != NULL
7505 && elf_section_data (isec)->this_hdr.contents != contents)
7506 free (contents);
7507 if (internal_relocs != NULL
7508 && elf_section_data (isec)->relocs != internal_relocs)
7509 free (internal_relocs);
7510 return FALSE;
7511 }
7512 \f
7513 /* What to do when ld finds relocations against symbols defined in
7514 discarded sections. */
7515
7516 static unsigned int
7517 ppc_elf_action_discarded (asection *sec)
7518 {
7519 if (strcmp (".fixup", sec->name) == 0)
7520 return 0;
7521
7522 if (strcmp (".got2", sec->name) == 0)
7523 return 0;
7524
7525 return _bfd_elf_default_action_discarded (sec);
7526 }
7527 \f
7528 /* Fill in the address for a pointer generated in a linker section. */
7529
7530 static bfd_vma
7531 elf_finish_pointer_linker_section (bfd *input_bfd,
7532 elf_linker_section_t *lsect,
7533 struct elf_link_hash_entry *h,
7534 bfd_vma relocation,
7535 const Elf_Internal_Rela *rel)
7536 {
7537 elf_linker_section_pointers_t *linker_section_ptr;
7538
7539 BFD_ASSERT (lsect != NULL);
7540
7541 if (h != NULL)
7542 {
7543 /* Handle global symbol. */
7544 struct ppc_elf_link_hash_entry *eh;
7545
7546 eh = (struct ppc_elf_link_hash_entry *) h;
7547 BFD_ASSERT (eh->elf.def_regular);
7548 linker_section_ptr = eh->linker_section_pointer;
7549 }
7550 else
7551 {
7552 /* Handle local symbol. */
7553 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7554
7555 BFD_ASSERT (is_ppc_elf (input_bfd));
7556 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7557 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7558 }
7559
7560 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7561 rel->r_addend,
7562 lsect);
7563 BFD_ASSERT (linker_section_ptr != NULL);
7564
7565 /* Offset will always be a multiple of four, so use the bottom bit
7566 as a "written" flag. */
7567 if ((linker_section_ptr->offset & 1) == 0)
7568 {
7569 bfd_put_32 (lsect->section->owner,
7570 relocation + linker_section_ptr->addend,
7571 lsect->section->contents + linker_section_ptr->offset);
7572 linker_section_ptr->offset += 1;
7573 }
7574
7575 relocation = (lsect->section->output_section->vma
7576 + lsect->section->output_offset
7577 + linker_section_ptr->offset - 1
7578 - SYM_VAL (lsect->sym));
7579
7580 #ifdef DEBUG
7581 fprintf (stderr,
7582 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7583 lsect->name, (long) relocation, (long) relocation);
7584 #endif
7585
7586 return relocation;
7587 }
7588
7589 #define PPC_LO(v) ((v) & 0xffff)
7590 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7591 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7592
7593 static void
7594 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7595 struct bfd_link_info *info)
7596 {
7597 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7598 bfd *output_bfd = info->output_bfd;
7599 bfd_vma plt;
7600
7601 plt = ((ent->plt.offset & ~1)
7602 + plt_sec->output_section->vma
7603 + plt_sec->output_offset);
7604
7605 if (bfd_link_pic (info))
7606 {
7607 bfd_vma got = 0;
7608
7609 if (ent->addend >= 32768)
7610 got = (ent->addend
7611 + ent->sec->output_section->vma
7612 + ent->sec->output_offset);
7613 else if (htab->elf.hgot != NULL)
7614 got = SYM_VAL (htab->elf.hgot);
7615
7616 plt -= got;
7617
7618 if (plt + 0x8000 < 0x10000)
7619 {
7620 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7621 p += 4;
7622 bfd_put_32 (output_bfd, MTCTR_11, p);
7623 p += 4;
7624 bfd_put_32 (output_bfd, BCTR, p);
7625 p += 4;
7626 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7627 p += 4;
7628 }
7629 else
7630 {
7631 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7632 p += 4;
7633 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, MTCTR_11, p);
7636 p += 4;
7637 bfd_put_32 (output_bfd, BCTR, p);
7638 p += 4;
7639 }
7640 }
7641 else
7642 {
7643 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7644 p += 4;
7645 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7646 p += 4;
7647 bfd_put_32 (output_bfd, MTCTR_11, p);
7648 p += 4;
7649 bfd_put_32 (output_bfd, BCTR, p);
7650 p += 4;
7651 }
7652 }
7653
7654 /* Return true if symbol is defined statically. */
7655
7656 static bfd_boolean
7657 is_static_defined (struct elf_link_hash_entry *h)
7658 {
7659 return ((h->root.type == bfd_link_hash_defined
7660 || h->root.type == bfd_link_hash_defweak)
7661 && h->root.u.def.section != NULL
7662 && h->root.u.def.section->output_section != NULL);
7663 }
7664
7665 /* If INSN is an opcode that may be used with an @tls operand, return
7666 the transformed insn for TLS optimisation, otherwise return 0. If
7667 REG is non-zero only match an insn with RB or RA equal to REG. */
7668
7669 unsigned int
7670 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7671 {
7672 unsigned int rtra;
7673
7674 if ((insn & (0x3f << 26)) != 31 << 26)
7675 return 0;
7676
7677 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7678 rtra = insn & ((1 << 26) - (1 << 16));
7679 else if (((insn >> 16) & 0x1f) == reg)
7680 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7681 else
7682 return 0;
7683
7684 if ((insn & (0x3ff << 1)) == 266 << 1)
7685 /* add -> addi. */
7686 insn = 14 << 26;
7687 else if ((insn & (0x1f << 1)) == 23 << 1
7688 && ((insn & (0x1f << 6)) < 14 << 6
7689 || ((insn & (0x1f << 6)) >= 16 << 6
7690 && (insn & (0x1f << 6)) < 24 << 6)))
7691 /* load and store indexed -> dform. */
7692 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7693 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7694 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7695 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7696 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7697 /* lwax -> lwa. */
7698 insn = (58 << 26) | 2;
7699 else
7700 return 0;
7701 insn |= rtra;
7702 return insn;
7703 }
7704
7705 /* If INSN is an opcode that may be used with an @tprel operand, return
7706 the transformed insn for an undefined weak symbol, ie. with the
7707 thread pointer REG operand removed. Otherwise return 0. */
7708
7709 unsigned int
7710 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7711 {
7712 if ((insn & (0x1f << 16)) == reg << 16
7713 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7714 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7715 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7716 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7717 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7718 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7719 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7720 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7721 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7722 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7723 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7724 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7725 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7726 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7727 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7728 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7729 && (insn & 3) != 1)
7730 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7731 && ((insn & 3) == 0 || (insn & 3) == 3))))
7732 {
7733 insn &= ~(0x1f << 16);
7734 }
7735 else if ((insn & (0x1f << 21)) == reg << 21
7736 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7737 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7738 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7739 {
7740 insn &= ~(0x1f << 21);
7741 insn |= (insn & (0x1f << 16)) << 5;
7742 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7743 insn -= 2 >> 26; /* convert to ori,oris */
7744 }
7745 else
7746 insn = 0;
7747 return insn;
7748 }
7749
7750 static bfd_boolean
7751 is_insn_ds_form (unsigned int insn)
7752 {
7753 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7754 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7755 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7756 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7757 }
7758
7759 static bfd_boolean
7760 is_insn_dq_form (unsigned int insn)
7761 {
7762 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7763 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7764 && (insn & 3) == 1));
7765 }
7766
7767 /* The RELOCATE_SECTION function is called by the ELF backend linker
7768 to handle the relocations for a section.
7769
7770 The relocs are always passed as Rela structures; if the section
7771 actually uses Rel structures, the r_addend field will always be
7772 zero.
7773
7774 This function is responsible for adjust the section contents as
7775 necessary, and (if using Rela relocs and generating a
7776 relocatable output file) adjusting the reloc addend as
7777 necessary.
7778
7779 This function does not have to worry about setting the reloc
7780 address or the reloc symbol index.
7781
7782 LOCAL_SYMS is a pointer to the swapped in local symbols.
7783
7784 LOCAL_SECTIONS is an array giving the section in the input file
7785 corresponding to the st_shndx field of each local symbol.
7786
7787 The global hash table entry for the global symbols can be found
7788 via elf_sym_hashes (input_bfd).
7789
7790 When generating relocatable output, this function must handle
7791 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7792 going to be the section symbol corresponding to the output
7793 section, which means that the addend must be adjusted
7794 accordingly. */
7795
7796 static bfd_boolean
7797 ppc_elf_relocate_section (bfd *output_bfd,
7798 struct bfd_link_info *info,
7799 bfd *input_bfd,
7800 asection *input_section,
7801 bfd_byte *contents,
7802 Elf_Internal_Rela *relocs,
7803 Elf_Internal_Sym *local_syms,
7804 asection **local_sections)
7805 {
7806 Elf_Internal_Shdr *symtab_hdr;
7807 struct elf_link_hash_entry **sym_hashes;
7808 struct ppc_elf_link_hash_table *htab;
7809 Elf_Internal_Rela *rel;
7810 Elf_Internal_Rela *wrel;
7811 Elf_Internal_Rela *relend;
7812 Elf_Internal_Rela outrel;
7813 asection *got2;
7814 bfd_vma *local_got_offsets;
7815 bfd_boolean ret = TRUE;
7816 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7817 bfd_boolean is_vxworks_tls;
7818 unsigned int picfixup_size = 0;
7819 struct ppc_elf_relax_info *relax_info = NULL;
7820
7821 #ifdef DEBUG
7822 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7823 "%ld relocations%s",
7824 input_bfd, input_section,
7825 (long) input_section->reloc_count,
7826 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7827 #endif
7828
7829 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7830
7831 /* Initialize howto table if not already done. */
7832 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7833 ppc_elf_howto_init ();
7834
7835 htab = ppc_elf_hash_table (info);
7836 local_got_offsets = elf_local_got_offsets (input_bfd);
7837 symtab_hdr = &elf_symtab_hdr (input_bfd);
7838 sym_hashes = elf_sym_hashes (input_bfd);
7839 /* We have to handle relocations in vxworks .tls_vars sections
7840 specially, because the dynamic loader is 'weird'. */
7841 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7842 && !strcmp (input_section->output_section->name,
7843 ".tls_vars"));
7844 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7845 relax_info = elf_section_data (input_section)->sec_info;
7846 rel = wrel = relocs;
7847 relend = relocs + input_section->reloc_count;
7848 for (; rel < relend; wrel++, rel++)
7849 {
7850 enum elf_ppc_reloc_type r_type;
7851 bfd_vma addend;
7852 bfd_reloc_status_type r;
7853 Elf_Internal_Sym *sym;
7854 asection *sec;
7855 struct elf_link_hash_entry *h;
7856 const char *sym_name;
7857 reloc_howto_type *howto;
7858 unsigned long r_symndx;
7859 bfd_vma relocation;
7860 bfd_vma branch_bit, from;
7861 bfd_boolean unresolved_reloc;
7862 bfd_boolean warned;
7863 unsigned int tls_type, tls_mask, tls_gd;
7864 struct plt_entry **ifunc;
7865 struct reloc_howto_struct alt_howto;
7866
7867 again:
7868 r_type = ELF32_R_TYPE (rel->r_info);
7869 sym = NULL;
7870 sec = NULL;
7871 h = NULL;
7872 unresolved_reloc = FALSE;
7873 warned = FALSE;
7874 r_symndx = ELF32_R_SYM (rel->r_info);
7875
7876 if (r_symndx < symtab_hdr->sh_info)
7877 {
7878 sym = local_syms + r_symndx;
7879 sec = local_sections[r_symndx];
7880 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7881
7882 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7883 }
7884 else
7885 {
7886 bfd_boolean ignored;
7887
7888 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7889 r_symndx, symtab_hdr, sym_hashes,
7890 h, sec, relocation,
7891 unresolved_reloc, warned, ignored);
7892
7893 sym_name = h->root.root.string;
7894 }
7895
7896 if (sec != NULL && discarded_section (sec))
7897 {
7898 /* For relocs against symbols from removed linkonce sections,
7899 or sections discarded by a linker script, we just want the
7900 section contents zeroed. Avoid any special processing. */
7901 howto = NULL;
7902 if (r_type < R_PPC_max)
7903 howto = ppc_elf_howto_table[r_type];
7904
7905 _bfd_clear_contents (howto, input_bfd, input_section,
7906 contents + rel->r_offset);
7907 wrel->r_offset = rel->r_offset;
7908 wrel->r_info = 0;
7909 wrel->r_addend = 0;
7910
7911 /* For ld -r, remove relocations in debug sections against
7912 sections defined in discarded sections. Not done for
7913 non-debug to preserve relocs in .eh_frame which the
7914 eh_frame editing code expects to be present. */
7915 if (bfd_link_relocatable (info)
7916 && (input_section->flags & SEC_DEBUGGING))
7917 wrel--;
7918
7919 continue;
7920 }
7921
7922 if (bfd_link_relocatable (info))
7923 {
7924 if (got2 != NULL
7925 && r_type == R_PPC_PLTREL24
7926 && rel->r_addend != 0)
7927 {
7928 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7929 addend specifies the GOT pointer offset within .got2. */
7930 rel->r_addend += got2->output_offset;
7931 }
7932 if (r_type != R_PPC_RELAX_PLT
7933 && r_type != R_PPC_RELAX_PLTREL24
7934 && r_type != R_PPC_RELAX)
7935 goto copy_reloc;
7936 }
7937
7938 /* TLS optimizations. Replace instruction sequences and relocs
7939 based on information we collected in tls_optimize. We edit
7940 RELOCS so that --emit-relocs will output something sensible
7941 for the final instruction stream. */
7942 tls_mask = 0;
7943 tls_gd = 0;
7944 if (h != NULL)
7945 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7946 else if (local_got_offsets != NULL)
7947 {
7948 struct plt_entry **local_plt;
7949 char *lgot_masks;
7950 local_plt
7951 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7952 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7953 tls_mask = lgot_masks[r_symndx];
7954 }
7955
7956 /* Ensure reloc mapping code below stays sane. */
7957 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7958 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7959 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7960 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7961 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7962 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7963 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7964 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7965 abort ();
7966 switch (r_type)
7967 {
7968 default:
7969 break;
7970
7971 case R_PPC_GOT_TPREL16:
7972 case R_PPC_GOT_TPREL16_LO:
7973 if ((tls_mask & TLS_TLS) != 0
7974 && (tls_mask & TLS_TPREL) == 0)
7975 {
7976 bfd_vma insn;
7977
7978 insn = bfd_get_32 (input_bfd,
7979 contents + rel->r_offset - d_offset);
7980 insn &= 31 << 21;
7981 insn |= 0x3c020000; /* addis 0,2,0 */
7982 bfd_put_32 (input_bfd, insn,
7983 contents + rel->r_offset - d_offset);
7984 r_type = R_PPC_TPREL16_HA;
7985 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7986 }
7987 break;
7988
7989 case R_PPC_TLS:
7990 if ((tls_mask & TLS_TLS) != 0
7991 && (tls_mask & TLS_TPREL) == 0)
7992 {
7993 bfd_vma insn;
7994
7995 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7996 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7997 if (insn == 0)
7998 abort ();
7999 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8000 r_type = R_PPC_TPREL16_LO;
8001 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8002
8003 /* Was PPC_TLS which sits on insn boundary, now
8004 PPC_TPREL16_LO which is at low-order half-word. */
8005 rel->r_offset += d_offset;
8006 }
8007 break;
8008
8009 case R_PPC_GOT_TLSGD16_HI:
8010 case R_PPC_GOT_TLSGD16_HA:
8011 tls_gd = TLS_TPRELGD;
8012 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8013 goto tls_gdld_hi;
8014 break;
8015
8016 case R_PPC_GOT_TLSLD16_HI:
8017 case R_PPC_GOT_TLSLD16_HA:
8018 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8019 {
8020 tls_gdld_hi:
8021 if ((tls_mask & tls_gd) != 0)
8022 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8023 + R_PPC_GOT_TPREL16);
8024 else
8025 {
8026 rel->r_offset -= d_offset;
8027 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8028 r_type = R_PPC_NONE;
8029 }
8030 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8031 }
8032 break;
8033
8034 case R_PPC_GOT_TLSGD16:
8035 case R_PPC_GOT_TLSGD16_LO:
8036 tls_gd = TLS_TPRELGD;
8037 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8038 goto tls_ldgd_opt;
8039 break;
8040
8041 case R_PPC_GOT_TLSLD16:
8042 case R_PPC_GOT_TLSLD16_LO:
8043 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8044 {
8045 unsigned int insn1, insn2;
8046 bfd_vma offset;
8047
8048 tls_ldgd_opt:
8049 offset = (bfd_vma) -1;
8050 /* If not using the newer R_PPC_TLSGD/LD to mark
8051 __tls_get_addr calls, we must trust that the call
8052 stays with its arg setup insns, ie. that the next
8053 reloc is the __tls_get_addr call associated with
8054 the current reloc. Edit both insns. */
8055 if (input_section->has_tls_get_addr_call
8056 && rel + 1 < relend
8057 && branch_reloc_hash_match (input_bfd, rel + 1,
8058 htab->tls_get_addr))
8059 offset = rel[1].r_offset;
8060 /* We read the low GOT_TLS insn because we need to keep
8061 the destination reg. It may be something other than
8062 the usual r3, and moved to r3 before the call by
8063 intervening code. */
8064 insn1 = bfd_get_32 (input_bfd,
8065 contents + rel->r_offset - d_offset);
8066 if ((tls_mask & tls_gd) != 0)
8067 {
8068 /* IE */
8069 insn1 &= (0x1f << 21) | (0x1f << 16);
8070 insn1 |= 32 << 26; /* lwz */
8071 if (offset != (bfd_vma) -1)
8072 {
8073 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8074 insn2 = 0x7c631214; /* add 3,3,2 */
8075 bfd_put_32 (input_bfd, insn2, contents + offset);
8076 }
8077 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8078 + R_PPC_GOT_TPREL16);
8079 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8080 }
8081 else
8082 {
8083 /* LE */
8084 insn1 &= 0x1f << 21;
8085 insn1 |= 0x3c020000; /* addis r,2,0 */
8086 if (tls_gd == 0)
8087 {
8088 /* Was an LD reloc. */
8089 for (r_symndx = 0;
8090 r_symndx < symtab_hdr->sh_info;
8091 r_symndx++)
8092 if (local_sections[r_symndx] == sec)
8093 break;
8094 if (r_symndx >= symtab_hdr->sh_info)
8095 r_symndx = STN_UNDEF;
8096 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8097 if (r_symndx != STN_UNDEF)
8098 rel->r_addend -= (local_syms[r_symndx].st_value
8099 + sec->output_offset
8100 + sec->output_section->vma);
8101 }
8102 r_type = R_PPC_TPREL16_HA;
8103 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8104 if (offset != (bfd_vma) -1)
8105 {
8106 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8107 rel[1].r_offset = offset + d_offset;
8108 rel[1].r_addend = rel->r_addend;
8109 insn2 = 0x38630000; /* addi 3,3,0 */
8110 bfd_put_32 (input_bfd, insn2, contents + offset);
8111 }
8112 }
8113 bfd_put_32 (input_bfd, insn1,
8114 contents + rel->r_offset - d_offset);
8115 if (tls_gd == 0)
8116 {
8117 /* We changed the symbol on an LD reloc. Start over
8118 in order to get h, sym, sec etc. right. */
8119 goto again;
8120 }
8121 }
8122 break;
8123
8124 case R_PPC_TLSGD:
8125 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8126 {
8127 unsigned int insn2;
8128 bfd_vma offset = rel->r_offset;
8129
8130 if ((tls_mask & TLS_TPRELGD) != 0)
8131 {
8132 /* IE */
8133 r_type = R_PPC_NONE;
8134 insn2 = 0x7c631214; /* add 3,3,2 */
8135 }
8136 else
8137 {
8138 /* LE */
8139 r_type = R_PPC_TPREL16_LO;
8140 rel->r_offset += d_offset;
8141 insn2 = 0x38630000; /* addi 3,3,0 */
8142 }
8143 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8144 bfd_put_32 (input_bfd, insn2, contents + offset);
8145 /* Zap the reloc on the _tls_get_addr call too. */
8146 BFD_ASSERT (offset == rel[1].r_offset);
8147 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8148 }
8149 break;
8150
8151 case R_PPC_TLSLD:
8152 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8153 {
8154 unsigned int insn2;
8155
8156 for (r_symndx = 0;
8157 r_symndx < symtab_hdr->sh_info;
8158 r_symndx++)
8159 if (local_sections[r_symndx] == sec)
8160 break;
8161 if (r_symndx >= symtab_hdr->sh_info)
8162 r_symndx = STN_UNDEF;
8163 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8164 if (r_symndx != STN_UNDEF)
8165 rel->r_addend -= (local_syms[r_symndx].st_value
8166 + sec->output_offset
8167 + sec->output_section->vma);
8168
8169 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8170 rel->r_offset += d_offset;
8171 insn2 = 0x38630000; /* addi 3,3,0 */
8172 bfd_put_32 (input_bfd, insn2,
8173 contents + rel->r_offset - d_offset);
8174 /* Zap the reloc on the _tls_get_addr call too. */
8175 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8176 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8177 goto again;
8178 }
8179 break;
8180 }
8181
8182 /* Handle other relocations that tweak non-addend part of insn. */
8183 branch_bit = 0;
8184 switch (r_type)
8185 {
8186 default:
8187 break;
8188
8189 /* Branch taken prediction relocations. */
8190 case R_PPC_ADDR14_BRTAKEN:
8191 case R_PPC_REL14_BRTAKEN:
8192 branch_bit = BRANCH_PREDICT_BIT;
8193 /* Fall through. */
8194
8195 /* Branch not taken prediction relocations. */
8196 case R_PPC_ADDR14_BRNTAKEN:
8197 case R_PPC_REL14_BRNTAKEN:
8198 {
8199 bfd_vma insn;
8200
8201 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8202 insn &= ~BRANCH_PREDICT_BIT;
8203 insn |= branch_bit;
8204
8205 from = (rel->r_offset
8206 + input_section->output_offset
8207 + input_section->output_section->vma);
8208
8209 /* Invert 'y' bit if not the default. */
8210 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8211 insn ^= BRANCH_PREDICT_BIT;
8212
8213 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8214 break;
8215 }
8216 }
8217
8218 if (ELIMINATE_COPY_RELOCS
8219 && h != NULL
8220 && !h->def_regular
8221 && h->protected_def
8222 && ppc_elf_hash_entry (h)->has_addr16_ha
8223 && ppc_elf_hash_entry (h)->has_addr16_lo
8224 && htab->params->pic_fixup > 0)
8225 {
8226 /* Convert lis;addi or lis;load/store accessing a protected
8227 variable defined in a shared library to PIC. */
8228 unsigned int insn;
8229
8230 if (r_type == R_PPC_ADDR16_HA)
8231 {
8232 insn = bfd_get_32 (input_bfd,
8233 contents + rel->r_offset - d_offset);
8234 if ((insn & (0x3f << 26)) == (15u << 26)
8235 && (insn & (0x1f << 16)) == 0 /* lis */)
8236 {
8237 bfd_byte *p;
8238 bfd_vma off;
8239 bfd_vma got_addr;
8240
8241 p = (contents + input_section->size
8242 - relax_info->workaround_size
8243 - relax_info->picfixup_size
8244 + picfixup_size);
8245 off = (p - contents) - (rel->r_offset - d_offset);
8246 if (off > 0x1fffffc || (off & 3) != 0)
8247 info->callbacks->einfo
8248 (_("%H: fixup branch overflow\n"),
8249 input_bfd, input_section, rel->r_offset);
8250
8251 bfd_put_32 (input_bfd, B | off,
8252 contents + rel->r_offset - d_offset);
8253 got_addr = (htab->elf.sgot->output_section->vma
8254 + htab->elf.sgot->output_offset
8255 + (h->got.offset & ~1));
8256 wrel->r_offset = (p - contents) + d_offset;
8257 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8258 wrel->r_addend = got_addr;
8259 insn &= ~0xffff;
8260 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8261 bfd_put_32 (input_bfd, insn, p);
8262
8263 /* Convert lis to lwz, loading address from GOT. */
8264 insn &= ~0xffff;
8265 insn ^= (32u ^ 15u) << 26;
8266 insn |= (insn & (0x1f << 21)) >> 5;
8267 insn |= got_addr & 0xffff;
8268 bfd_put_32 (input_bfd, insn, p + 4);
8269
8270 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8271 picfixup_size += 12;
8272
8273 /* Use one of the spare relocs, so --emit-relocs
8274 output is reasonable. */
8275 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8276 wrel++, rel++;
8277 rel->r_offset = wrel[-1].r_offset + 4;
8278 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8279 rel->r_addend = wrel[-1].r_addend;
8280
8281 /* Continue on as if we had a got reloc, to output
8282 dynamic reloc. */
8283 r_type = R_PPC_GOT16_LO;
8284 }
8285 else
8286 info->callbacks->einfo
8287 /* xgettext:c-format */
8288 (_("%H: error: %s with unexpected instruction %x\n"),
8289 input_bfd, input_section, rel->r_offset,
8290 "R_PPC_ADDR16_HA", insn);
8291 }
8292 else if (r_type == R_PPC_ADDR16_LO)
8293 {
8294 insn = bfd_get_32 (input_bfd,
8295 contents + rel->r_offset - d_offset);
8296 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8297 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8298 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8299 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8300 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8301 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8302 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8303 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8304 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8305 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8306 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8307 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8308 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8309 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8310 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8311 && (insn & 3) != 1)
8312 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8313 && ((insn & 3) == 0 || (insn & 3) == 3)))
8314 {
8315 /* Arrange to apply the reloc addend, if any. */
8316 relocation = 0;
8317 unresolved_reloc = FALSE;
8318 rel->r_info = ELF32_R_INFO (0, r_type);
8319 }
8320 else
8321 info->callbacks->einfo
8322 /* xgettext:c-format */
8323 (_("%H: error: %s with unexpected instruction %x\n"),
8324 input_bfd, input_section, rel->r_offset,
8325 "R_PPC_ADDR16_LO", insn);
8326 }
8327 }
8328
8329 ifunc = NULL;
8330 if (!htab->is_vxworks)
8331 {
8332 struct plt_entry *ent;
8333
8334 if (h != NULL)
8335 {
8336 if (h->type == STT_GNU_IFUNC)
8337 ifunc = &h->plt.plist;
8338 }
8339 else if (local_got_offsets != NULL
8340 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8341 {
8342 struct plt_entry **local_plt;
8343
8344 local_plt = (struct plt_entry **) (local_got_offsets
8345 + symtab_hdr->sh_info);
8346 ifunc = local_plt + r_symndx;
8347 }
8348
8349 ent = NULL;
8350 if (ifunc != NULL
8351 && (!bfd_link_pic (info)
8352 || is_branch_reloc (r_type)))
8353 {
8354 addend = 0;
8355 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8356 addend = rel->r_addend;
8357 ent = find_plt_ent (ifunc, got2, addend);
8358 }
8359 if (ent != NULL)
8360 {
8361 if (bfd_link_pic (info)
8362 && ent->sec != got2
8363 && htab->plt_type != PLT_NEW
8364 && (!htab->elf.dynamic_sections_created
8365 || h == NULL
8366 || h->dynindx == -1))
8367 {
8368 /* Uh oh, we are going to create a pic glink stub
8369 for an ifunc (here for h == NULL and later in
8370 finish_dynamic_symbol for h != NULL), and
8371 apparently are using code compiled with
8372 -mbss-plt. The difficulty is that -mbss-plt code
8373 gives no indication via a magic PLTREL24 addend
8374 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8375 is pointing into a .got2 section (and how far
8376 into .got2). */
8377 info->callbacks->einfo
8378 /* xgettext:c-format */
8379 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8380 input_bfd, input_section, rel->r_offset, sym_name);
8381 }
8382 if (h == NULL && (ent->plt.offset & 1) == 0)
8383 {
8384 Elf_Internal_Rela rela;
8385 bfd_byte *loc;
8386
8387 rela.r_offset = (htab->elf.iplt->output_section->vma
8388 + htab->elf.iplt->output_offset
8389 + ent->plt.offset);
8390 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8391 rela.r_addend = relocation;
8392 loc = htab->elf.irelplt->contents;
8393 loc += (htab->elf.irelplt->reloc_count++
8394 * sizeof (Elf32_External_Rela));
8395 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8396 htab->local_ifunc_resolver = 1;
8397
8398 ent->plt.offset |= 1;
8399 }
8400 if (h == NULL && (ent->glink_offset & 1) == 0)
8401 {
8402 unsigned char *p = ((unsigned char *) htab->glink->contents
8403 + ent->glink_offset);
8404 write_glink_stub (ent, htab->elf.iplt, p, info);
8405 ent->glink_offset |= 1;
8406 }
8407
8408 unresolved_reloc = FALSE;
8409 if (htab->plt_type == PLT_NEW
8410 || !htab->elf.dynamic_sections_created
8411 || h == NULL
8412 || h->dynindx == -1)
8413 relocation = (htab->glink->output_section->vma
8414 + htab->glink->output_offset
8415 + (ent->glink_offset & ~1));
8416 else
8417 relocation = (htab->elf.splt->output_section->vma
8418 + htab->elf.splt->output_offset
8419 + ent->plt.offset);
8420 }
8421 }
8422
8423 addend = rel->r_addend;
8424 tls_type = 0;
8425 howto = NULL;
8426 if (r_type < R_PPC_max)
8427 howto = ppc_elf_howto_table[r_type];
8428 switch (r_type)
8429 {
8430 default:
8431 info->callbacks->einfo
8432 /* xgettext:c-format */
8433 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8434 input_bfd, (int) r_type, sym_name);
8435
8436 bfd_set_error (bfd_error_bad_value);
8437 ret = FALSE;
8438 goto copy_reloc;
8439
8440 case R_PPC_NONE:
8441 case R_PPC_TLS:
8442 case R_PPC_TLSGD:
8443 case R_PPC_TLSLD:
8444 case R_PPC_EMB_MRKREF:
8445 case R_PPC_GNU_VTINHERIT:
8446 case R_PPC_GNU_VTENTRY:
8447 goto copy_reloc;
8448
8449 /* GOT16 relocations. Like an ADDR16 using the symbol's
8450 address in the GOT as relocation value instead of the
8451 symbol's value itself. Also, create a GOT entry for the
8452 symbol and put the symbol value there. */
8453 case R_PPC_GOT_TLSGD16:
8454 case R_PPC_GOT_TLSGD16_LO:
8455 case R_PPC_GOT_TLSGD16_HI:
8456 case R_PPC_GOT_TLSGD16_HA:
8457 tls_type = TLS_TLS | TLS_GD;
8458 goto dogot;
8459
8460 case R_PPC_GOT_TLSLD16:
8461 case R_PPC_GOT_TLSLD16_LO:
8462 case R_PPC_GOT_TLSLD16_HI:
8463 case R_PPC_GOT_TLSLD16_HA:
8464 tls_type = TLS_TLS | TLS_LD;
8465 goto dogot;
8466
8467 case R_PPC_GOT_TPREL16:
8468 case R_PPC_GOT_TPREL16_LO:
8469 case R_PPC_GOT_TPREL16_HI:
8470 case R_PPC_GOT_TPREL16_HA:
8471 tls_type = TLS_TLS | TLS_TPREL;
8472 goto dogot;
8473
8474 case R_PPC_GOT_DTPREL16:
8475 case R_PPC_GOT_DTPREL16_LO:
8476 case R_PPC_GOT_DTPREL16_HI:
8477 case R_PPC_GOT_DTPREL16_HA:
8478 tls_type = TLS_TLS | TLS_DTPREL;
8479 goto dogot;
8480
8481 case R_PPC_GOT16:
8482 case R_PPC_GOT16_LO:
8483 case R_PPC_GOT16_HI:
8484 case R_PPC_GOT16_HA:
8485 tls_mask = 0;
8486 dogot:
8487 {
8488 /* Relocation is to the entry for this symbol in the global
8489 offset table. */
8490 bfd_vma off;
8491 bfd_vma *offp;
8492 unsigned long indx;
8493
8494 if (htab->elf.sgot == NULL)
8495 abort ();
8496
8497 indx = 0;
8498 if (tls_type == (TLS_TLS | TLS_LD)
8499 && (h == NULL
8500 || !h->def_dynamic))
8501 offp = &htab->tlsld_got.offset;
8502 else if (h != NULL)
8503 {
8504 if (!htab->elf.dynamic_sections_created
8505 || h->dynindx == -1
8506 || SYMBOL_REFERENCES_LOCAL (info, h)
8507 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8508 && h->root.type == bfd_link_hash_undefweak))
8509 /* This is actually a static link, or it is a
8510 -Bsymbolic link and the symbol is defined
8511 locally, or the symbol was forced to be local
8512 because of a version file. */
8513 ;
8514 else
8515 {
8516 indx = h->dynindx;
8517 unresolved_reloc = FALSE;
8518 }
8519 offp = &h->got.offset;
8520 }
8521 else
8522 {
8523 if (local_got_offsets == NULL)
8524 abort ();
8525 offp = &local_got_offsets[r_symndx];
8526 }
8527
8528 /* The offset must always be a multiple of 4. We use the
8529 least significant bit to record whether we have already
8530 processed this entry. */
8531 off = *offp;
8532 if ((off & 1) != 0)
8533 off &= ~1;
8534 else
8535 {
8536 unsigned int tls_m = (tls_mask
8537 & (TLS_LD | TLS_GD | TLS_DTPREL
8538 | TLS_TPREL | TLS_TPRELGD));
8539
8540 if (offp == &htab->tlsld_got.offset)
8541 tls_m = TLS_LD;
8542 else if (h == NULL
8543 || !h->def_dynamic)
8544 tls_m &= ~TLS_LD;
8545
8546 /* We might have multiple got entries for this sym.
8547 Initialize them all. */
8548 do
8549 {
8550 int tls_ty = 0;
8551
8552 if ((tls_m & TLS_LD) != 0)
8553 {
8554 tls_ty = TLS_TLS | TLS_LD;
8555 tls_m &= ~TLS_LD;
8556 }
8557 else if ((tls_m & TLS_GD) != 0)
8558 {
8559 tls_ty = TLS_TLS | TLS_GD;
8560 tls_m &= ~TLS_GD;
8561 }
8562 else if ((tls_m & TLS_DTPREL) != 0)
8563 {
8564 tls_ty = TLS_TLS | TLS_DTPREL;
8565 tls_m &= ~TLS_DTPREL;
8566 }
8567 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8568 {
8569 tls_ty = TLS_TLS | TLS_TPREL;
8570 tls_m = 0;
8571 }
8572
8573 /* Generate relocs for the dynamic linker. */
8574 if (indx != 0
8575 || (bfd_link_pic (info)
8576 && (h == NULL
8577 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8578 || h->root.type != bfd_link_hash_undefweak
8579 || offp == &htab->tlsld_got.offset)))
8580 {
8581 asection *rsec = htab->elf.srelgot;
8582 bfd_byte * loc;
8583
8584 if (ifunc != NULL)
8585 {
8586 rsec = htab->elf.irelplt;
8587 if (indx == 0)
8588 htab->local_ifunc_resolver = 1;
8589 else if (is_static_defined (h))
8590 htab->maybe_local_ifunc_resolver = 1;
8591 }
8592 outrel.r_offset = (htab->elf.sgot->output_section->vma
8593 + htab->elf.sgot->output_offset
8594 + off);
8595 outrel.r_addend = 0;
8596 if (tls_ty & (TLS_LD | TLS_GD))
8597 {
8598 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8599 if (tls_ty == (TLS_TLS | TLS_GD))
8600 {
8601 loc = rsec->contents;
8602 loc += (rsec->reloc_count++
8603 * sizeof (Elf32_External_Rela));
8604 bfd_elf32_swap_reloca_out (output_bfd,
8605 &outrel, loc);
8606 outrel.r_offset += 4;
8607 outrel.r_info
8608 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8609 }
8610 }
8611 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8612 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8613 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8614 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8615 else if (indx != 0)
8616 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8617 else if (ifunc != NULL)
8618 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8619 else
8620 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8621 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8622 {
8623 outrel.r_addend += relocation;
8624 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8625 {
8626 if (htab->elf.tls_sec == NULL)
8627 outrel.r_addend = 0;
8628 else
8629 outrel.r_addend -= htab->elf.tls_sec->vma;
8630 }
8631 }
8632 loc = rsec->contents;
8633 loc += (rsec->reloc_count++
8634 * sizeof (Elf32_External_Rela));
8635 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8636 }
8637
8638 /* Init the .got section contents if we're not
8639 emitting a reloc. */
8640 else
8641 {
8642 bfd_vma value = relocation;
8643 int tlsopt = (htab->plt_type == PLT_NEW
8644 && !htab->params->no_tls_get_addr_opt
8645 && htab->tls_get_addr != NULL
8646 && htab->tls_get_addr->plt.plist != NULL);
8647
8648 if (tls_ty != 0)
8649 {
8650 if (htab->elf.tls_sec == NULL)
8651 value = 0;
8652 else
8653 {
8654 if (tls_ty & TLS_LD)
8655 value = 0;
8656 else
8657 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8658 if ((tls_ty & TLS_TPREL)
8659 || (tlsopt && !(tls_ty & TLS_DTPREL)))
8660 value += DTP_OFFSET - TP_OFFSET;
8661 }
8662
8663 if (tls_ty & (TLS_LD | TLS_GD))
8664 {
8665 bfd_put_32 (input_bfd, value,
8666 htab->elf.sgot->contents + off + 4);
8667 value = !tlsopt;
8668 }
8669 }
8670 bfd_put_32 (input_bfd, value,
8671 htab->elf.sgot->contents + off);
8672 }
8673
8674 off += 4;
8675 if (tls_ty & (TLS_LD | TLS_GD))
8676 off += 4;
8677 }
8678 while (tls_m != 0);
8679
8680 off = *offp;
8681 *offp = off | 1;
8682 }
8683
8684 if (off >= (bfd_vma) -2)
8685 abort ();
8686
8687 if ((tls_type & TLS_TLS) != 0)
8688 {
8689 if (tls_type != (TLS_TLS | TLS_LD))
8690 {
8691 if ((tls_mask & TLS_LD) != 0
8692 && !(h == NULL
8693 || !h->def_dynamic))
8694 off += 8;
8695 if (tls_type != (TLS_TLS | TLS_GD))
8696 {
8697 if ((tls_mask & TLS_GD) != 0)
8698 off += 8;
8699 if (tls_type != (TLS_TLS | TLS_DTPREL))
8700 {
8701 if ((tls_mask & TLS_DTPREL) != 0)
8702 off += 4;
8703 }
8704 }
8705 }
8706 }
8707
8708 /* If here for a picfixup, we're done. */
8709 if (r_type != ELF32_R_TYPE (rel->r_info))
8710 goto copy_reloc;
8711
8712 relocation = (htab->elf.sgot->output_section->vma
8713 + htab->elf.sgot->output_offset
8714 + off
8715 - SYM_VAL (htab->elf.hgot));
8716
8717 /* Addends on got relocations don't make much sense.
8718 x+off@got is actually x@got+off, and since the got is
8719 generated by a hash table traversal, the value in the
8720 got at entry m+n bears little relation to the entry m. */
8721 if (addend != 0)
8722 info->callbacks->einfo
8723 /* xgettext:c-format */
8724 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8725 input_bfd, input_section, rel->r_offset,
8726 howto->name,
8727 sym_name);
8728 }
8729 break;
8730
8731 /* Relocations that need no special processing. */
8732 case R_PPC_LOCAL24PC:
8733 /* It makes no sense to point a local relocation
8734 at a symbol not in this object. */
8735 if (unresolved_reloc)
8736 {
8737 (*info->callbacks->undefined_symbol) (info,
8738 h->root.root.string,
8739 input_bfd,
8740 input_section,
8741 rel->r_offset,
8742 TRUE);
8743 goto copy_reloc;
8744 }
8745 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8746 {
8747 /* @local on an ifunc does not really make sense since
8748 the ifunc resolver can take you anywhere. More
8749 seriously, calls to ifuncs must go through a plt call
8750 stub, and for pic the plt call stubs uses r30 to
8751 access the PLT. The problem is that a call that is
8752 local won't have the +32k reloc addend trick marking
8753 -fPIC code, so the linker won't know whether r30 is
8754 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8755 /* xgettext:c-format */
8756 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8757 input_bfd, input_section, rel->r_offset,
8758 h->root.root.string);
8759 }
8760 break;
8761
8762 case R_PPC_DTPREL16:
8763 case R_PPC_DTPREL16_LO:
8764 case R_PPC_DTPREL16_HI:
8765 case R_PPC_DTPREL16_HA:
8766 if (htab->elf.tls_sec != NULL)
8767 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8768 break;
8769
8770 /* Relocations that may need to be propagated if this is a shared
8771 object. */
8772 case R_PPC_TPREL16:
8773 case R_PPC_TPREL16_LO:
8774 case R_PPC_TPREL16_HI:
8775 case R_PPC_TPREL16_HA:
8776 if (h != NULL
8777 && h->root.type == bfd_link_hash_undefweak
8778 && h->dynindx == -1)
8779 {
8780 /* Make this relocation against an undefined weak symbol
8781 resolve to zero. This is really just a tweak, since
8782 code using weak externs ought to check that they are
8783 defined before using them. */
8784 bfd_byte *p = contents + rel->r_offset - d_offset;
8785 unsigned int insn = bfd_get_32 (input_bfd, p);
8786 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8787 if (insn != 0)
8788 bfd_put_32 (input_bfd, insn, p);
8789 break;
8790 }
8791 if (htab->elf.tls_sec != NULL)
8792 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8793 /* The TPREL16 relocs shouldn't really be used in shared
8794 libs as they will result in DT_TEXTREL being set, but
8795 support them anyway. */
8796 goto dodyn;
8797
8798 case R_PPC_TPREL32:
8799 if (htab->elf.tls_sec != NULL)
8800 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8801 goto dodyn;
8802
8803 case R_PPC_DTPREL32:
8804 if (htab->elf.tls_sec != NULL)
8805 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8806 goto dodyn;
8807
8808 case R_PPC_DTPMOD32:
8809 relocation = 1;
8810 addend = 0;
8811 goto dodyn;
8812
8813 case R_PPC_REL16:
8814 case R_PPC_REL16_LO:
8815 case R_PPC_REL16_HI:
8816 case R_PPC_REL16_HA:
8817 case R_PPC_REL16DX_HA:
8818 break;
8819
8820 case R_PPC_REL32:
8821 if (h == NULL || h == htab->elf.hgot)
8822 break;
8823 /* fall through */
8824
8825 case R_PPC_ADDR32:
8826 case R_PPC_ADDR16:
8827 case R_PPC_ADDR16_LO:
8828 case R_PPC_ADDR16_HI:
8829 case R_PPC_ADDR16_HA:
8830 case R_PPC_UADDR32:
8831 case R_PPC_UADDR16:
8832 goto dodyn;
8833
8834 case R_PPC_VLE_REL8:
8835 case R_PPC_VLE_REL15:
8836 case R_PPC_VLE_REL24:
8837 case R_PPC_REL24:
8838 case R_PPC_REL14:
8839 case R_PPC_REL14_BRTAKEN:
8840 case R_PPC_REL14_BRNTAKEN:
8841 /* If these relocations are not to a named symbol, they can be
8842 handled right here, no need to bother the dynamic linker. */
8843 if (SYMBOL_CALLS_LOCAL (info, h)
8844 || h == htab->elf.hgot)
8845 break;
8846 /* fall through */
8847
8848 case R_PPC_ADDR24:
8849 case R_PPC_ADDR14:
8850 case R_PPC_ADDR14_BRTAKEN:
8851 case R_PPC_ADDR14_BRNTAKEN:
8852 if (h != NULL && !bfd_link_pic (info))
8853 break;
8854 /* fall through */
8855
8856 dodyn:
8857 if ((input_section->flags & SEC_ALLOC) == 0
8858 || is_vxworks_tls)
8859 break;
8860
8861 if ((bfd_link_pic (info)
8862 && !(h != NULL
8863 && ((h->root.type == bfd_link_hash_undefined
8864 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8865 || (h->root.type == bfd_link_hash_undefweak
8866 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8867 || info->dynamic_undefined_weak == 0))))
8868 && (must_be_dyn_reloc (info, r_type)
8869 || !SYMBOL_CALLS_LOCAL (info, h)))
8870 || (ELIMINATE_COPY_RELOCS
8871 && !bfd_link_pic (info)
8872 && h != NULL
8873 && h->dynindx != -1
8874 && !h->non_got_ref
8875 && !h->def_regular
8876 && !(h->protected_def
8877 && ppc_elf_hash_entry (h)->has_addr16_ha
8878 && ppc_elf_hash_entry (h)->has_addr16_lo
8879 && htab->params->pic_fixup > 0)))
8880 {
8881 int skip;
8882 bfd_byte *loc;
8883 asection *sreloc;
8884 long indx = 0;
8885
8886 #ifdef DEBUG
8887 fprintf (stderr, "ppc_elf_relocate_section needs to "
8888 "create relocation for %s\n",
8889 (h && h->root.root.string
8890 ? h->root.root.string : "<unknown>"));
8891 #endif
8892
8893 /* When generating a shared object, these relocations
8894 are copied into the output file to be resolved at run
8895 time. */
8896 skip = 0;
8897 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8898 input_section,
8899 rel->r_offset);
8900 if (outrel.r_offset == (bfd_vma) -1
8901 || outrel.r_offset == (bfd_vma) -2)
8902 skip = (int) outrel.r_offset;
8903 outrel.r_offset += (input_section->output_section->vma
8904 + input_section->output_offset);
8905
8906 if (skip)
8907 memset (&outrel, 0, sizeof outrel);
8908 else if ((h != NULL
8909 && (h->root.type == bfd_link_hash_undefined
8910 || h->root.type == bfd_link_hash_undefweak))
8911 || !SYMBOL_REFERENCES_LOCAL (info, h))
8912 {
8913 indx = h->dynindx;
8914 BFD_ASSERT (indx != -1);
8915 unresolved_reloc = FALSE;
8916 outrel.r_info = ELF32_R_INFO (indx, r_type);
8917 outrel.r_addend = rel->r_addend;
8918 }
8919 else
8920 {
8921 outrel.r_addend = relocation + rel->r_addend;
8922
8923 if (r_type != R_PPC_ADDR32)
8924 {
8925 if (ifunc != NULL)
8926 {
8927 /* If we get here when building a static
8928 executable, then the libc startup function
8929 responsible for applying indirect function
8930 relocations is going to complain about
8931 the reloc type.
8932 If we get here when building a dynamic
8933 executable, it will be because we have
8934 a text relocation. The dynamic loader
8935 will set the text segment writable and
8936 non-executable to apply text relocations.
8937 So we'll segfault when trying to run the
8938 indirection function to resolve the reloc. */
8939 info->callbacks->einfo
8940 /* xgettext:c-format */
8941 (_("%H: relocation %s for indirect "
8942 "function %s unsupported\n"),
8943 input_bfd, input_section, rel->r_offset,
8944 howto->name,
8945 sym_name);
8946 ret = FALSE;
8947 }
8948 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8949 ;
8950 else if (sec == NULL || sec->owner == NULL)
8951 {
8952 bfd_set_error (bfd_error_bad_value);
8953 ret = FALSE;
8954 }
8955 else
8956 {
8957 asection *osec;
8958
8959 /* We are turning this relocation into one
8960 against a section symbol. It would be
8961 proper to subtract the symbol's value,
8962 osec->vma, from the emitted reloc addend,
8963 but ld.so expects buggy relocs.
8964 FIXME: Why not always use a zero index? */
8965 osec = sec->output_section;
8966 indx = elf_section_data (osec)->dynindx;
8967 if (indx == 0)
8968 {
8969 osec = htab->elf.text_index_section;
8970 indx = elf_section_data (osec)->dynindx;
8971 }
8972 BFD_ASSERT (indx != 0);
8973 #ifdef DEBUG
8974 if (indx == 0)
8975 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8976 indx, osec->name, osec->flags,
8977 h->root.root.string);
8978 #endif
8979 }
8980
8981 outrel.r_info = ELF32_R_INFO (indx, r_type);
8982 }
8983 else if (ifunc != NULL)
8984 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8985 else
8986 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8987 }
8988
8989 sreloc = elf_section_data (input_section)->sreloc;
8990 if (ifunc)
8991 {
8992 sreloc = htab->elf.irelplt;
8993 if (indx == 0)
8994 htab->local_ifunc_resolver = 1;
8995 else if (is_static_defined (h))
8996 htab->maybe_local_ifunc_resolver = 1;
8997 }
8998 if (sreloc == NULL)
8999 return FALSE;
9000
9001 loc = sreloc->contents;
9002 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9003 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9004
9005 if (skip == -1)
9006 goto copy_reloc;
9007
9008 /* This reloc will be computed at runtime. Clear the memory
9009 so that it contains a predictable value for prelink. */
9010 if (!skip)
9011 {
9012 relocation = howto->pc_relative ? outrel.r_offset : 0;
9013 addend = 0;
9014 break;
9015 }
9016 }
9017 else if (r_type == R_PPC_DTPMOD32
9018 && htab->plt_type == PLT_NEW
9019 && !htab->params->no_tls_get_addr_opt
9020 && htab->tls_get_addr != NULL
9021 && htab->tls_get_addr->plt.plist != NULL)
9022 {
9023 /* Set up for __tls_get_addr_opt stub when this entry
9024 does not have dynamic relocs. */
9025 relocation = 0;
9026 /* Set up the next word for local dynamic. If it turns
9027 out to be global dynamic, the reloc will overwrite
9028 this value. */
9029 if (rel->r_offset + 8 <= input_section->size)
9030 bfd_put_32 (input_bfd, DTP_OFFSET - TP_OFFSET,
9031 contents + rel->r_offset + 4);
9032 }
9033 else if (r_type == R_PPC_DTPREL32
9034 && htab->plt_type == PLT_NEW
9035 && !htab->params->no_tls_get_addr_opt
9036 && htab->tls_get_addr != NULL
9037 && htab->tls_get_addr->plt.plist != NULL
9038 && rel > relocs
9039 && rel[-1].r_info == ELF32_R_INFO (r_symndx, R_PPC_DTPMOD32)
9040 && rel[-1].r_offset + 4 == rel->r_offset)
9041 {
9042 /* __tls_get_addr_opt stub value. */
9043 addend += DTP_OFFSET - TP_OFFSET;
9044 }
9045 break;
9046
9047 case R_PPC_RELAX_PLT:
9048 case R_PPC_RELAX_PLTREL24:
9049 if (h != NULL)
9050 {
9051 struct plt_entry *ent;
9052 bfd_vma got2_addend = 0;
9053
9054 if (r_type == R_PPC_RELAX_PLTREL24)
9055 {
9056 if (bfd_link_pic (info))
9057 got2_addend = addend;
9058 addend = 0;
9059 }
9060 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9061 if (htab->plt_type == PLT_NEW)
9062 relocation = (htab->glink->output_section->vma
9063 + htab->glink->output_offset
9064 + ent->glink_offset);
9065 else
9066 relocation = (htab->elf.splt->output_section->vma
9067 + htab->elf.splt->output_offset
9068 + ent->plt.offset);
9069 }
9070 /* Fall through. */
9071
9072 case R_PPC_RELAX:
9073 {
9074 const int *stub;
9075 size_t size;
9076 size_t insn_offset = rel->r_offset;
9077 unsigned int insn;
9078
9079 if (bfd_link_pic (info))
9080 {
9081 relocation -= (input_section->output_section->vma
9082 + input_section->output_offset
9083 + rel->r_offset - 4);
9084 stub = shared_stub_entry;
9085 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9086 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9087 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9088 stub += 3;
9089 size = ARRAY_SIZE (shared_stub_entry) - 3;
9090 }
9091 else
9092 {
9093 stub = stub_entry;
9094 size = ARRAY_SIZE (stub_entry);
9095 }
9096
9097 relocation += addend;
9098 if (bfd_link_relocatable (info))
9099 relocation = 0;
9100
9101 /* First insn is HA, second is LO. */
9102 insn = *stub++;
9103 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9104 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9105 insn_offset += 4;
9106
9107 insn = *stub++;
9108 insn |= relocation & 0xffff;
9109 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9110 insn_offset += 4;
9111 size -= 2;
9112
9113 while (size != 0)
9114 {
9115 insn = *stub++;
9116 --size;
9117 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9118 insn_offset += 4;
9119 }
9120
9121 /* Rewrite the reloc and convert one of the trailing nop
9122 relocs to describe this relocation. */
9123 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9124 /* The relocs are at the bottom 2 bytes */
9125 wrel->r_offset = rel->r_offset + d_offset;
9126 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9127 wrel->r_addend = rel->r_addend;
9128 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9129 wrel++, rel++;
9130 wrel->r_offset += 4;
9131 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9132 }
9133 continue;
9134
9135 /* Indirect .sdata relocation. */
9136 case R_PPC_EMB_SDAI16:
9137 BFD_ASSERT (htab->sdata[0].section != NULL);
9138 if (!is_static_defined (htab->sdata[0].sym))
9139 {
9140 unresolved_reloc = TRUE;
9141 break;
9142 }
9143 relocation
9144 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9145 h, relocation, rel);
9146 addend = 0;
9147 break;
9148
9149 /* Indirect .sdata2 relocation. */
9150 case R_PPC_EMB_SDA2I16:
9151 BFD_ASSERT (htab->sdata[1].section != NULL);
9152 if (!is_static_defined (htab->sdata[1].sym))
9153 {
9154 unresolved_reloc = TRUE;
9155 break;
9156 }
9157 relocation
9158 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9159 h, relocation, rel);
9160 addend = 0;
9161 break;
9162
9163 /* Handle the TOC16 reloc. We want to use the offset within the .got
9164 section, not the actual VMA. This is appropriate when generating
9165 an embedded ELF object, for which the .got section acts like the
9166 AIX .toc section. */
9167 case R_PPC_TOC16: /* phony GOT16 relocations */
9168 if (sec == NULL || sec->output_section == NULL)
9169 {
9170 unresolved_reloc = TRUE;
9171 break;
9172 }
9173 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9174 ".got") == 0
9175 || strcmp (bfd_get_section_name (sec->owner, sec),
9176 ".cgot") == 0);
9177
9178 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9179 break;
9180
9181 case R_PPC_PLTREL24:
9182 if (h != NULL && ifunc == NULL)
9183 {
9184 struct plt_entry *ent;
9185
9186 ent = find_plt_ent (&h->plt.plist, got2,
9187 bfd_link_pic (info) ? addend : 0);
9188 if (ent == NULL
9189 || htab->elf.splt == NULL)
9190 {
9191 /* We didn't make a PLT entry for this symbol. This
9192 happens when statically linking PIC code, or when
9193 using -Bsymbolic. */
9194 }
9195 else
9196 {
9197 /* Relocation is to the entry for this symbol in the
9198 procedure linkage table. */
9199 unresolved_reloc = FALSE;
9200 if (htab->plt_type == PLT_NEW)
9201 relocation = (htab->glink->output_section->vma
9202 + htab->glink->output_offset
9203 + ent->glink_offset);
9204 else
9205 relocation = (htab->elf.splt->output_section->vma
9206 + htab->elf.splt->output_offset
9207 + ent->plt.offset);
9208 }
9209 }
9210
9211 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9212 addend specifies the GOT pointer offset within .got2.
9213 Don't apply it to the relocation field. */
9214 addend = 0;
9215 break;
9216
9217 /* Relocate against _SDA_BASE_. */
9218 case R_PPC_SDAREL16:
9219 {
9220 const char *name;
9221 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9222
9223 if (sec == NULL
9224 || sec->output_section == NULL
9225 || !is_static_defined (sda))
9226 {
9227 unresolved_reloc = TRUE;
9228 break;
9229 }
9230 addend -= SYM_VAL (sda);
9231
9232 name = bfd_get_section_name (output_bfd, sec->output_section);
9233 if (!(strcmp (name, ".sdata") == 0
9234 || strcmp (name, ".sbss") == 0))
9235 {
9236 info->callbacks->einfo
9237 /* xgettext:c-format */
9238 (_("%P: %B: the target (%s) of a %s relocation is "
9239 "in the wrong output section (%s)\n"),
9240 input_bfd,
9241 sym_name,
9242 howto->name,
9243 name);
9244 }
9245 }
9246 break;
9247
9248 /* Relocate against _SDA2_BASE_. */
9249 case R_PPC_EMB_SDA2REL:
9250 {
9251 const char *name;
9252 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9253
9254 if (sec == NULL
9255 || sec->output_section == NULL
9256 || !is_static_defined (sda))
9257 {
9258 unresolved_reloc = TRUE;
9259 break;
9260 }
9261 addend -= SYM_VAL (sda);
9262
9263 name = bfd_get_section_name (output_bfd, sec->output_section);
9264 if (!(strcmp (name, ".sdata2") == 0
9265 || strcmp (name, ".sbss2") == 0))
9266 {
9267 info->callbacks->einfo
9268 /* xgettext:c-format */
9269 (_("%P: %B: the target (%s) of a %s relocation is "
9270 "in the wrong output section (%s)\n"),
9271 input_bfd,
9272 sym_name,
9273 howto->name,
9274 name);
9275 }
9276 }
9277 break;
9278
9279 case R_PPC_VLE_LO16A:
9280 relocation = relocation + addend;
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_LO16D:
9287 relocation = relocation + addend;
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_HI16A:
9294 relocation = (relocation + addend) >> 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_HI16D:
9301 relocation = (relocation + addend) >> 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 case R_PPC_VLE_HA16A:
9308 relocation = (relocation + addend + 0x8000) >> 16;
9309 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9310 contents + rel->r_offset, relocation,
9311 split16a_type, htab->params->vle_reloc_fixup);
9312 goto copy_reloc;
9313
9314 case R_PPC_VLE_HA16D:
9315 relocation = (relocation + addend + 0x8000) >> 16;
9316 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9317 contents + rel->r_offset, relocation,
9318 split16d_type, htab->params->vle_reloc_fixup);
9319 goto copy_reloc;
9320
9321 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9322 case R_PPC_EMB_SDA21:
9323 case R_PPC_VLE_SDA21:
9324 case R_PPC_EMB_RELSDA:
9325 case R_PPC_VLE_SDA21_LO:
9326 {
9327 const char *name;
9328 int reg;
9329 unsigned int insn;
9330 struct elf_link_hash_entry *sda = NULL;
9331
9332 if (sec == NULL || sec->output_section == NULL)
9333 {
9334 unresolved_reloc = TRUE;
9335 break;
9336 }
9337
9338 name = bfd_get_section_name (output_bfd, sec->output_section);
9339 if (strcmp (name, ".sdata") == 0
9340 || strcmp (name, ".sbss") == 0)
9341 {
9342 reg = 13;
9343 sda = htab->sdata[0].sym;
9344 }
9345 else if (strcmp (name, ".sdata2") == 0
9346 || strcmp (name, ".sbss2") == 0)
9347 {
9348 reg = 2;
9349 sda = htab->sdata[1].sym;
9350 }
9351 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9352 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9353 {
9354 reg = 0;
9355 }
9356 else
9357 {
9358 info->callbacks->einfo
9359 /* xgettext:c-format */
9360 (_("%P: %B: the target (%s) of a %s relocation is "
9361 "in the wrong output section (%s)\n"),
9362 input_bfd,
9363 sym_name,
9364 howto->name,
9365 name);
9366
9367 bfd_set_error (bfd_error_bad_value);
9368 ret = FALSE;
9369 goto copy_reloc;
9370 }
9371
9372 if (sda != NULL)
9373 {
9374 if (!is_static_defined (sda))
9375 {
9376 unresolved_reloc = TRUE;
9377 break;
9378 }
9379 addend -= SYM_VAL (sda);
9380 }
9381
9382 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9383 if (reg == 0
9384 && (r_type == R_PPC_VLE_SDA21
9385 || r_type == R_PPC_VLE_SDA21_LO))
9386 {
9387 relocation = relocation + addend;
9388 addend = 0;
9389
9390 /* Force e_li insn, keeping RT from original insn. */
9391 insn &= 0x1f << 21;
9392 insn |= 28u << 26;
9393
9394 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9395 /* Top 4 bits of value to 17..20. */
9396 insn |= (relocation & 0xf0000) >> 5;
9397 /* Next 5 bits of the value to 11..15. */
9398 insn |= (relocation & 0xf800) << 5;
9399 /* And the final 11 bits of the value to bits 21 to 31. */
9400 insn |= relocation & 0x7ff;
9401
9402 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9403
9404 if (r_type == R_PPC_VLE_SDA21
9405 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9406 goto overflow;
9407 goto copy_reloc;
9408 }
9409 else if (r_type == R_PPC_EMB_SDA21
9410 || r_type == R_PPC_VLE_SDA21
9411 || r_type == R_PPC_VLE_SDA21_LO)
9412 {
9413 /* Fill in register field. */
9414 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9415 }
9416 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9417 }
9418 break;
9419
9420 case R_PPC_VLE_SDAREL_LO16A:
9421 case R_PPC_VLE_SDAREL_LO16D:
9422 case R_PPC_VLE_SDAREL_HI16A:
9423 case R_PPC_VLE_SDAREL_HI16D:
9424 case R_PPC_VLE_SDAREL_HA16A:
9425 case R_PPC_VLE_SDAREL_HA16D:
9426 {
9427 bfd_vma value;
9428 const char *name;
9429 struct elf_link_hash_entry *sda = NULL;
9430
9431 if (sec == NULL || sec->output_section == NULL)
9432 {
9433 unresolved_reloc = TRUE;
9434 break;
9435 }
9436
9437 name = bfd_get_section_name (output_bfd, sec->output_section);
9438 if (strcmp (name, ".sdata") == 0
9439 || strcmp (name, ".sbss") == 0)
9440 sda = htab->sdata[0].sym;
9441 else if (strcmp (name, ".sdata2") == 0
9442 || strcmp (name, ".sbss2") == 0)
9443 sda = htab->sdata[1].sym;
9444 else
9445 {
9446 _bfd_error_handler
9447 /* xgettext:c-format */
9448 (_("%B: the target (%s) of a %s relocation is "
9449 "in the wrong output section (%s)"),
9450 input_bfd,
9451 sym_name,
9452 howto->name,
9453 name);
9454
9455 bfd_set_error (bfd_error_bad_value);
9456 ret = FALSE;
9457 goto copy_reloc;
9458 }
9459
9460 if (sda == NULL || !is_static_defined (sda))
9461 {
9462 unresolved_reloc = TRUE;
9463 break;
9464 }
9465 value = relocation + addend - SYM_VAL (sda);
9466
9467 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9468 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9469 contents + rel->r_offset, value,
9470 split16a_type,
9471 htab->params->vle_reloc_fixup);
9472 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9473 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9474 contents + rel->r_offset, value,
9475 split16d_type,
9476 htab->params->vle_reloc_fixup);
9477 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9478 {
9479 value = value >> 16;
9480 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9481 contents + rel->r_offset, value,
9482 split16a_type,
9483 htab->params->vle_reloc_fixup);
9484 }
9485 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9486 {
9487 value = value >> 16;
9488 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9489 contents + rel->r_offset, value,
9490 split16d_type,
9491 htab->params->vle_reloc_fixup);
9492 }
9493 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9494 {
9495 value = (value + 0x8000) >> 16;
9496 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9497 contents + rel->r_offset, value,
9498 split16a_type,
9499 htab->params->vle_reloc_fixup);
9500 }
9501 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9502 {
9503 value = (value + 0x8000) >> 16;
9504 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9505 contents + rel->r_offset, value,
9506 split16d_type,
9507 htab->params->vle_reloc_fixup);
9508 }
9509 }
9510 goto copy_reloc;
9511
9512 /* Relocate against the beginning of the section. */
9513 case R_PPC_SECTOFF:
9514 case R_PPC_SECTOFF_LO:
9515 case R_PPC_SECTOFF_HI:
9516 case R_PPC_SECTOFF_HA:
9517 if (sec == NULL || sec->output_section == NULL)
9518 {
9519 unresolved_reloc = TRUE;
9520 break;
9521 }
9522 addend -= sec->output_section->vma;
9523 break;
9524
9525 /* Negative relocations. */
9526 case R_PPC_EMB_NADDR32:
9527 case R_PPC_EMB_NADDR16:
9528 case R_PPC_EMB_NADDR16_LO:
9529 case R_PPC_EMB_NADDR16_HI:
9530 case R_PPC_EMB_NADDR16_HA:
9531 addend -= 2 * relocation;
9532 break;
9533
9534 case R_PPC_COPY:
9535 case R_PPC_GLOB_DAT:
9536 case R_PPC_JMP_SLOT:
9537 case R_PPC_RELATIVE:
9538 case R_PPC_IRELATIVE:
9539 case R_PPC_PLT32:
9540 case R_PPC_PLTREL32:
9541 case R_PPC_PLT16_LO:
9542 case R_PPC_PLT16_HI:
9543 case R_PPC_PLT16_HA:
9544 case R_PPC_ADDR30:
9545 case R_PPC_EMB_RELSEC16:
9546 case R_PPC_EMB_RELST_LO:
9547 case R_PPC_EMB_RELST_HI:
9548 case R_PPC_EMB_RELST_HA:
9549 case R_PPC_EMB_BIT_FLD:
9550 info->callbacks->einfo
9551 /* xgettext:c-format */
9552 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9553 input_bfd,
9554 howto->name,
9555 sym_name);
9556
9557 bfd_set_error (bfd_error_invalid_operation);
9558 ret = FALSE;
9559 goto copy_reloc;
9560 }
9561
9562 /* Do any further special processing. */
9563 switch (r_type)
9564 {
9565 default:
9566 break;
9567
9568 case R_PPC_ADDR16_HA:
9569 case R_PPC_REL16_HA:
9570 case R_PPC_REL16DX_HA:
9571 case R_PPC_SECTOFF_HA:
9572 case R_PPC_TPREL16_HA:
9573 case R_PPC_DTPREL16_HA:
9574 case R_PPC_EMB_NADDR16_HA:
9575 case R_PPC_EMB_RELST_HA:
9576 /* It's just possible that this symbol is a weak symbol
9577 that's not actually defined anywhere. In that case,
9578 'sec' would be NULL, and we should leave the symbol
9579 alone (it will be set to zero elsewhere in the link). */
9580 if (sec == NULL)
9581 break;
9582 /* Fall through. */
9583
9584 case R_PPC_PLT16_HA:
9585 case R_PPC_GOT16_HA:
9586 case R_PPC_GOT_TLSGD16_HA:
9587 case R_PPC_GOT_TLSLD16_HA:
9588 case R_PPC_GOT_TPREL16_HA:
9589 case R_PPC_GOT_DTPREL16_HA:
9590 /* Add 0x10000 if sign bit in 0:15 is set.
9591 Bits 0:15 are not used. */
9592 addend += 0x8000;
9593 break;
9594
9595 case R_PPC_ADDR16:
9596 case R_PPC_ADDR16_LO:
9597 case R_PPC_GOT16:
9598 case R_PPC_GOT16_LO:
9599 case R_PPC_SDAREL16:
9600 case R_PPC_SECTOFF:
9601 case R_PPC_SECTOFF_LO:
9602 case R_PPC_DTPREL16:
9603 case R_PPC_DTPREL16_LO:
9604 case R_PPC_TPREL16:
9605 case R_PPC_TPREL16_LO:
9606 case R_PPC_GOT_TLSGD16:
9607 case R_PPC_GOT_TLSGD16_LO:
9608 case R_PPC_GOT_TLSLD16:
9609 case R_PPC_GOT_TLSLD16_LO:
9610 case R_PPC_GOT_DTPREL16:
9611 case R_PPC_GOT_DTPREL16_LO:
9612 case R_PPC_GOT_TPREL16:
9613 case R_PPC_GOT_TPREL16_LO:
9614 {
9615 /* The 32-bit ABI lacks proper relocations to deal with
9616 certain 64-bit instructions. Prevent damage to bits
9617 that make up part of the insn opcode. */
9618 unsigned int insn, mask, lobit;
9619
9620 insn = bfd_get_32 (input_bfd,
9621 contents + rel->r_offset - d_offset);
9622 mask = 0;
9623 if (is_insn_ds_form (insn))
9624 mask = 3;
9625 else if (is_insn_dq_form (insn))
9626 mask = 15;
9627 else
9628 break;
9629 relocation += addend;
9630 addend = insn & mask;
9631 lobit = mask & relocation;
9632 if (lobit != 0)
9633 {
9634 relocation ^= lobit;
9635 info->callbacks->einfo
9636 /* xgettext:c-format */
9637 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9638 input_bfd, input_section, rel->r_offset,
9639 howto->name, sym_name, mask + 1);
9640 bfd_set_error (bfd_error_bad_value);
9641 ret = FALSE;
9642 }
9643 }
9644 break;
9645 }
9646
9647 #ifdef DEBUG
9648 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9649 "offset = %ld, addend = %ld\n",
9650 howto->name,
9651 (int) r_type,
9652 sym_name,
9653 r_symndx,
9654 (long) rel->r_offset,
9655 (long) addend);
9656 #endif
9657
9658 if (unresolved_reloc
9659 && !((input_section->flags & SEC_DEBUGGING) != 0
9660 && h->def_dynamic)
9661 && _bfd_elf_section_offset (output_bfd, info, input_section,
9662 rel->r_offset) != (bfd_vma) -1)
9663 {
9664 info->callbacks->einfo
9665 /* xgettext:c-format */
9666 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9667 input_bfd, input_section, rel->r_offset,
9668 howto->name,
9669 sym_name);
9670 ret = FALSE;
9671 }
9672
9673 /* 16-bit fields in insns mostly have signed values, but a
9674 few insns have 16-bit unsigned values. Really, we should
9675 have different reloc types. */
9676 if (howto->complain_on_overflow != complain_overflow_dont
9677 && howto->dst_mask == 0xffff
9678 && (input_section->flags & SEC_CODE) != 0)
9679 {
9680 enum complain_overflow complain = complain_overflow_signed;
9681
9682 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9683 {
9684 unsigned int insn;
9685
9686 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9687 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9688 complain = complain_overflow_bitfield;
9689 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9690 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9691 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9692 complain = complain_overflow_unsigned;
9693 }
9694 if (howto->complain_on_overflow != complain)
9695 {
9696 alt_howto = *howto;
9697 alt_howto.complain_on_overflow = complain;
9698 howto = &alt_howto;
9699 }
9700 }
9701
9702 if (r_type == R_PPC_REL16DX_HA)
9703 {
9704 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9705 if (rel->r_offset + 4 > input_section->size)
9706 r = bfd_reloc_outofrange;
9707 else
9708 {
9709 unsigned int insn;
9710
9711 relocation += addend;
9712 relocation -= (rel->r_offset
9713 + input_section->output_offset
9714 + input_section->output_section->vma);
9715 relocation >>= 16;
9716 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9717 insn &= ~0x1fffc1;
9718 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9719 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9720 r = bfd_reloc_ok;
9721 }
9722 }
9723 else
9724 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9725 rel->r_offset, relocation, addend);
9726
9727 if (r != bfd_reloc_ok)
9728 {
9729 if (r == bfd_reloc_overflow)
9730 {
9731 overflow:
9732 /* On code like "if (foo) foo();" don't report overflow
9733 on a branch to zero when foo is undefined. */
9734 if (!warned
9735 && !(h != NULL
9736 && (h->root.type == bfd_link_hash_undefweak
9737 || h->root.type == bfd_link_hash_undefined)
9738 && is_branch_reloc (r_type)))
9739 info->callbacks->reloc_overflow
9740 (info, (h ? &h->root : NULL), sym_name, howto->name,
9741 rel->r_addend, input_bfd, input_section, rel->r_offset);
9742 }
9743 else
9744 {
9745 info->callbacks->einfo
9746 /* xgettext:c-format */
9747 (_("%H: %s reloc against `%s': error %d\n"),
9748 input_bfd, input_section, rel->r_offset,
9749 howto->name, sym_name, (int) r);
9750 ret = FALSE;
9751 }
9752 }
9753 copy_reloc:
9754 if (wrel != rel)
9755 *wrel = *rel;
9756 }
9757
9758 if (wrel != rel)
9759 {
9760 Elf_Internal_Shdr *rel_hdr;
9761 size_t deleted = rel - wrel;
9762
9763 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9764 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9765 if (rel_hdr->sh_size == 0)
9766 {
9767 /* It is too late to remove an empty reloc section. Leave
9768 one NONE reloc.
9769 ??? What is wrong with an empty section??? */
9770 rel_hdr->sh_size = rel_hdr->sh_entsize;
9771 deleted -= 1;
9772 wrel++;
9773 }
9774 relend = wrel;
9775 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9776 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9777 input_section->reloc_count -= deleted;
9778 }
9779
9780 #ifdef DEBUG
9781 fprintf (stderr, "\n");
9782 #endif
9783
9784 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9785 && input_section->size != input_section->rawsize
9786 && (strcmp (input_section->output_section->name, ".init") == 0
9787 || strcmp (input_section->output_section->name, ".fini") == 0))
9788 {
9789 /* Branch around the trampolines. */
9790 unsigned int insn = B + input_section->size - input_section->rawsize;
9791 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9792 }
9793
9794 if (htab->params->ppc476_workaround
9795 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9796 && (!bfd_link_relocatable (info)
9797 || (input_section->output_section->alignment_power
9798 >= htab->params->pagesize_p2)))
9799 {
9800 bfd_vma start_addr, end_addr, addr;
9801 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9802
9803 if (relax_info->workaround_size != 0)
9804 {
9805 bfd_byte *p;
9806 unsigned int n;
9807 bfd_byte fill[4];
9808
9809 bfd_put_32 (input_bfd, BA, fill);
9810 p = contents + input_section->size - relax_info->workaround_size;
9811 n = relax_info->workaround_size >> 2;
9812 while (n--)
9813 {
9814 memcpy (p, fill, 4);
9815 p += 4;
9816 }
9817 }
9818
9819 /* The idea is: Replace the last instruction on a page with a
9820 branch to a patch area. Put the insn there followed by a
9821 branch back to the next page. Complicated a little by
9822 needing to handle moved conditional branches, and by not
9823 wanting to touch data-in-text. */
9824
9825 start_addr = (input_section->output_section->vma
9826 + input_section->output_offset);
9827 end_addr = (start_addr + input_section->size
9828 - relax_info->workaround_size);
9829 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9830 addr < end_addr;
9831 addr += pagesize)
9832 {
9833 bfd_vma offset = addr - start_addr;
9834 Elf_Internal_Rela *lo, *hi;
9835 bfd_boolean is_data;
9836 bfd_vma patch_off, patch_addr;
9837 unsigned int insn;
9838
9839 /* Do we have a data reloc at this offset? If so, leave
9840 the word alone. */
9841 is_data = FALSE;
9842 lo = relocs;
9843 hi = relend;
9844 rel = NULL;
9845 while (lo < hi)
9846 {
9847 rel = lo + (hi - lo) / 2;
9848 if (rel->r_offset < offset)
9849 lo = rel + 1;
9850 else if (rel->r_offset > offset + 3)
9851 hi = rel;
9852 else
9853 {
9854 switch (ELF32_R_TYPE (rel->r_info))
9855 {
9856 case R_PPC_ADDR32:
9857 case R_PPC_UADDR32:
9858 case R_PPC_REL32:
9859 case R_PPC_ADDR30:
9860 is_data = TRUE;
9861 break;
9862 default:
9863 break;
9864 }
9865 break;
9866 }
9867 }
9868 if (is_data)
9869 continue;
9870
9871 /* Some instructions can be left alone too. Unconditional
9872 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9873 avoid the icache failure.
9874
9875 The problem occurs due to prefetch across a page boundary
9876 where stale instructions can be fetched from the next
9877 page, and the mechanism for flushing these bad
9878 instructions fails under certain circumstances. The
9879 unconditional branches:
9880 1) Branch: b, bl, ba, bla,
9881 2) Branch Conditional: bc, bca, bcl, bcla,
9882 3) Branch Conditional to Link Register: bclr, bclrl,
9883 where (2) and (3) have BO=0x14 making them unconditional,
9884 prevent the bad prefetch because the prefetch itself is
9885 affected by these instructions. This happens even if the
9886 instruction is not executed.
9887
9888 A bctr example:
9889 .
9890 . lis 9,new_page@ha
9891 . addi 9,9,new_page@l
9892 . mtctr 9
9893 . bctr
9894 . nop
9895 . nop
9896 . new_page:
9897 .
9898 The bctr is not predicted taken due to ctr not being
9899 ready, so prefetch continues on past the bctr into the
9900 new page which might have stale instructions. If they
9901 fail to be flushed, then they will be executed after the
9902 bctr executes. Either of the following modifications
9903 prevent the bad prefetch from happening in the first
9904 place:
9905 .
9906 . lis 9,new_page@ha lis 9,new_page@ha
9907 . addi 9,9,new_page@l addi 9,9,new_page@l
9908 . mtctr 9 mtctr 9
9909 . bctr bctr
9910 . nop b somewhere_else
9911 . b somewhere_else nop
9912 . new_page: new_page:
9913 . */
9914 insn = bfd_get_32 (input_bfd, contents + offset);
9915 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9916 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9917 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9918 || ((insn & (0x3f << 26)) == (19u << 26)
9919 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9920 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9921 continue;
9922
9923 patch_addr = (start_addr + input_section->size
9924 - relax_info->workaround_size);
9925 patch_addr = (patch_addr + 15) & -16;
9926 patch_off = patch_addr - start_addr;
9927 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9928
9929 if (rel != NULL
9930 && rel->r_offset >= offset
9931 && rel->r_offset < offset + 4)
9932 {
9933 asection *sreloc;
9934
9935 /* If the insn we are patching had a reloc, adjust the
9936 reloc r_offset so that the reloc applies to the moved
9937 location. This matters for -r and --emit-relocs. */
9938 if (rel + 1 != relend)
9939 {
9940 Elf_Internal_Rela tmp = *rel;
9941
9942 /* Keep the relocs sorted by r_offset. */
9943 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9944 relend[-1] = tmp;
9945 }
9946 relend[-1].r_offset += patch_off - offset;
9947
9948 /* Adjust REL16 addends too. */
9949 switch (ELF32_R_TYPE (relend[-1].r_info))
9950 {
9951 case R_PPC_REL16:
9952 case R_PPC_REL16_LO:
9953 case R_PPC_REL16_HI:
9954 case R_PPC_REL16_HA:
9955 relend[-1].r_addend += patch_off - offset;
9956 break;
9957 default:
9958 break;
9959 }
9960
9961 /* If we are building a PIE or shared library with
9962 non-PIC objects, perhaps we had a dynamic reloc too?
9963 If so, the dynamic reloc must move with the insn. */
9964 sreloc = elf_section_data (input_section)->sreloc;
9965 if (sreloc != NULL)
9966 {
9967 Elf32_External_Rela *slo, *shi, *srelend;
9968 bfd_vma soffset;
9969
9970 slo = (Elf32_External_Rela *) sreloc->contents;
9971 shi = srelend = slo + sreloc->reloc_count;
9972 soffset = (offset + input_section->output_section->vma
9973 + input_section->output_offset);
9974 while (slo < shi)
9975 {
9976 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9977 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9978 &outrel);
9979 if (outrel.r_offset < soffset)
9980 slo = srel + 1;
9981 else if (outrel.r_offset > soffset + 3)
9982 shi = srel;
9983 else
9984 {
9985 if (srel + 1 != srelend)
9986 {
9987 memmove (srel, srel + 1,
9988 (srelend - (srel + 1)) * sizeof (*srel));
9989 srel = srelend - 1;
9990 }
9991 outrel.r_offset += patch_off - offset;
9992 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9993 (bfd_byte *) srel);
9994 break;
9995 }
9996 }
9997 }
9998 }
9999 else
10000 rel = NULL;
10001
10002 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10003 && (insn & 2) == 0 /* relative */)
10004 {
10005 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10006
10007 delta += offset - patch_off;
10008 if (bfd_link_relocatable (info) && rel != NULL)
10009 delta = 0;
10010 if (!bfd_link_relocatable (info) && rel != NULL)
10011 {
10012 enum elf_ppc_reloc_type r_type;
10013
10014 r_type = ELF32_R_TYPE (relend[-1].r_info);
10015 if (r_type == R_PPC_REL14_BRTAKEN)
10016 insn |= BRANCH_PREDICT_BIT;
10017 else if (r_type == R_PPC_REL14_BRNTAKEN)
10018 insn &= ~BRANCH_PREDICT_BIT;
10019 else
10020 BFD_ASSERT (r_type == R_PPC_REL14);
10021
10022 if ((r_type == R_PPC_REL14_BRTAKEN
10023 || r_type == R_PPC_REL14_BRNTAKEN)
10024 && delta + 0x8000 < 0x10000
10025 && (bfd_signed_vma) delta < 0)
10026 insn ^= BRANCH_PREDICT_BIT;
10027 }
10028 if (delta + 0x8000 < 0x10000)
10029 {
10030 bfd_put_32 (input_bfd,
10031 (insn & ~0xfffc) | (delta & 0xfffc),
10032 contents + patch_off);
10033 patch_off += 4;
10034 bfd_put_32 (input_bfd,
10035 B | ((offset + 4 - patch_off) & 0x3fffffc),
10036 contents + patch_off);
10037 patch_off += 4;
10038 }
10039 else
10040 {
10041 if (rel != NULL)
10042 {
10043 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10044
10045 relend[-1].r_offset += 8;
10046 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10047 }
10048 bfd_put_32 (input_bfd,
10049 (insn & ~0xfffc) | 8,
10050 contents + patch_off);
10051 patch_off += 4;
10052 bfd_put_32 (input_bfd,
10053 B | ((offset + 4 - patch_off) & 0x3fffffc),
10054 contents + patch_off);
10055 patch_off += 4;
10056 bfd_put_32 (input_bfd,
10057 B | ((delta - 8) & 0x3fffffc),
10058 contents + patch_off);
10059 patch_off += 4;
10060 }
10061 }
10062 else
10063 {
10064 bfd_put_32 (input_bfd, insn, contents + patch_off);
10065 patch_off += 4;
10066 bfd_put_32 (input_bfd,
10067 B | ((offset + 4 - patch_off) & 0x3fffffc),
10068 contents + patch_off);
10069 patch_off += 4;
10070 }
10071 BFD_ASSERT (patch_off <= input_section->size);
10072 relax_info->workaround_size = input_section->size - patch_off;
10073 }
10074 }
10075
10076 return ret;
10077 }
10078 \f
10079 /* Finish up dynamic symbol handling. We set the contents of various
10080 dynamic sections here. */
10081
10082 static bfd_boolean
10083 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10084 struct bfd_link_info *info,
10085 struct elf_link_hash_entry *h,
10086 Elf_Internal_Sym *sym)
10087 {
10088 struct ppc_elf_link_hash_table *htab;
10089 struct plt_entry *ent;
10090 bfd_boolean doneone;
10091
10092 #ifdef DEBUG
10093 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10094 h->root.root.string);
10095 #endif
10096
10097 htab = ppc_elf_hash_table (info);
10098 BFD_ASSERT (htab->elf.dynobj != NULL);
10099
10100 doneone = FALSE;
10101 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10102 if (ent->plt.offset != (bfd_vma) -1)
10103 {
10104 if (!doneone)
10105 {
10106 Elf_Internal_Rela rela;
10107 bfd_byte *loc;
10108 bfd_vma reloc_index;
10109
10110 if (htab->plt_type == PLT_NEW
10111 || !htab->elf.dynamic_sections_created
10112 || h->dynindx == -1)
10113 reloc_index = ent->plt.offset / 4;
10114 else
10115 {
10116 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10117 / htab->plt_slot_size);
10118 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10119 && htab->plt_type == PLT_OLD)
10120 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10121 }
10122
10123 /* This symbol has an entry in the procedure linkage table.
10124 Set it up. */
10125 if (htab->plt_type == PLT_VXWORKS
10126 && htab->elf.dynamic_sections_created
10127 && h->dynindx != -1)
10128 {
10129 bfd_vma got_offset;
10130 const bfd_vma *plt_entry;
10131
10132 /* The first three entries in .got.plt are reserved. */
10133 got_offset = (reloc_index + 3) * 4;
10134
10135 /* Use the right PLT. */
10136 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10137 : ppc_elf_vxworks_plt_entry;
10138
10139 /* Fill in the .plt on VxWorks. */
10140 if (bfd_link_pic (info))
10141 {
10142 bfd_put_32 (output_bfd,
10143 plt_entry[0] | PPC_HA (got_offset),
10144 htab->elf.splt->contents + ent->plt.offset + 0);
10145 bfd_put_32 (output_bfd,
10146 plt_entry[1] | PPC_LO (got_offset),
10147 htab->elf.splt->contents + ent->plt.offset + 4);
10148 }
10149 else
10150 {
10151 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10152
10153 bfd_put_32 (output_bfd,
10154 plt_entry[0] | PPC_HA (got_loc),
10155 htab->elf.splt->contents + ent->plt.offset + 0);
10156 bfd_put_32 (output_bfd,
10157 plt_entry[1] | PPC_LO (got_loc),
10158 htab->elf.splt->contents + ent->plt.offset + 4);
10159 }
10160
10161 bfd_put_32 (output_bfd, plt_entry[2],
10162 htab->elf.splt->contents + ent->plt.offset + 8);
10163 bfd_put_32 (output_bfd, plt_entry[3],
10164 htab->elf.splt->contents + ent->plt.offset + 12);
10165
10166 /* This instruction is an immediate load. The value loaded is
10167 the byte offset of the R_PPC_JMP_SLOT relocation from the
10168 start of the .rela.plt section. The value is stored in the
10169 low-order 16 bits of the load instruction. */
10170 /* NOTE: It appears that this is now an index rather than a
10171 prescaled offset. */
10172 bfd_put_32 (output_bfd,
10173 plt_entry[4] | reloc_index,
10174 htab->elf.splt->contents + ent->plt.offset + 16);
10175 /* This instruction is a PC-relative branch whose target is
10176 the start of the PLT section. The address of this branch
10177 instruction is 20 bytes beyond the start of this PLT entry.
10178 The address is encoded in bits 6-29, inclusive. The value
10179 stored is right-shifted by two bits, permitting a 26-bit
10180 offset. */
10181 bfd_put_32 (output_bfd,
10182 (plt_entry[5]
10183 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10184 htab->elf.splt->contents + ent->plt.offset + 20);
10185 bfd_put_32 (output_bfd, plt_entry[6],
10186 htab->elf.splt->contents + ent->plt.offset + 24);
10187 bfd_put_32 (output_bfd, plt_entry[7],
10188 htab->elf.splt->contents + ent->plt.offset + 28);
10189
10190 /* Fill in the GOT entry corresponding to this PLT slot with
10191 the address immediately after the "bctr" instruction
10192 in this PLT entry. */
10193 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10194 + htab->elf.splt->output_offset
10195 + ent->plt.offset + 16),
10196 htab->elf.sgotplt->contents + got_offset);
10197
10198 if (!bfd_link_pic (info))
10199 {
10200 /* Fill in a couple of entries in .rela.plt.unloaded. */
10201 loc = htab->srelplt2->contents
10202 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10203 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10204 * sizeof (Elf32_External_Rela));
10205
10206 /* Provide the @ha relocation for the first instruction. */
10207 rela.r_offset = (htab->elf.splt->output_section->vma
10208 + htab->elf.splt->output_offset
10209 + ent->plt.offset + 2);
10210 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10211 R_PPC_ADDR16_HA);
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 the @l relocation for the second instruction. */
10217 rela.r_offset = (htab->elf.splt->output_section->vma
10218 + htab->elf.splt->output_offset
10219 + ent->plt.offset + 6);
10220 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10221 R_PPC_ADDR16_LO);
10222 rela.r_addend = got_offset;
10223 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10224 loc += sizeof (Elf32_External_Rela);
10225
10226 /* Provide a relocation for the GOT entry corresponding to this
10227 PLT slot. Point it at the middle of the .plt entry. */
10228 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10229 + htab->elf.sgotplt->output_offset
10230 + got_offset);
10231 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10232 R_PPC_ADDR32);
10233 rela.r_addend = ent->plt.offset + 16;
10234 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10235 }
10236
10237 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10238 In particular, the offset for the relocation is not the
10239 address of the PLT entry for this function, as specified
10240 by the ABI. Instead, the offset is set to the address of
10241 the GOT slot for this function. See EABI 4.4.4.1. */
10242 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10243 + htab->elf.sgotplt->output_offset
10244 + got_offset);
10245
10246 }
10247 else
10248 {
10249 asection *splt = htab->elf.splt;
10250 if (!htab->elf.dynamic_sections_created
10251 || h->dynindx == -1)
10252 splt = htab->elf.iplt;
10253
10254 rela.r_offset = (splt->output_section->vma
10255 + splt->output_offset
10256 + ent->plt.offset);
10257 if (htab->plt_type == PLT_OLD
10258 || !htab->elf.dynamic_sections_created
10259 || h->dynindx == -1)
10260 {
10261 /* We don't need to fill in the .plt. The ppc dynamic
10262 linker will fill it in. */
10263 }
10264 else
10265 {
10266 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10267 + htab->glink->output_section->vma
10268 + htab->glink->output_offset);
10269 bfd_put_32 (output_bfd, val,
10270 splt->contents + ent->plt.offset);
10271 }
10272 }
10273
10274 /* Fill in the entry in the .rela.plt section. */
10275 rela.r_addend = 0;
10276 if (!htab->elf.dynamic_sections_created
10277 || h->dynindx == -1)
10278 {
10279 BFD_ASSERT (h->type == STT_GNU_IFUNC
10280 && h->def_regular
10281 && (h->root.type == bfd_link_hash_defined
10282 || h->root.type == bfd_link_hash_defweak));
10283 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10284 rela.r_addend = SYM_VAL (h);
10285 }
10286 else
10287 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10288
10289 if (!htab->elf.dynamic_sections_created
10290 || h->dynindx == -1)
10291 {
10292 loc = (htab->elf.irelplt->contents
10293 + (htab->elf.irelplt->reloc_count++
10294 * sizeof (Elf32_External_Rela)));
10295 htab->local_ifunc_resolver = 1;
10296 }
10297 else
10298 {
10299 loc = (htab->elf.srelplt->contents
10300 + reloc_index * sizeof (Elf32_External_Rela));
10301 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10302 htab->maybe_local_ifunc_resolver = 1;
10303 }
10304 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10305
10306 if (!h->def_regular)
10307 {
10308 /* Mark the symbol as undefined, rather than as
10309 defined in the .plt section. Leave the value if
10310 there were any relocations where pointer equality
10311 matters (this is a clue for the dynamic linker, to
10312 make function pointer comparisons work between an
10313 application and shared library), otherwise set it
10314 to zero. */
10315 sym->st_shndx = SHN_UNDEF;
10316 if (!h->pointer_equality_needed)
10317 sym->st_value = 0;
10318 else if (!h->ref_regular_nonweak)
10319 {
10320 /* This breaks function pointer comparisons, but
10321 that is better than breaking tests for a NULL
10322 function pointer. */
10323 sym->st_value = 0;
10324 }
10325 }
10326 else if (h->type == STT_GNU_IFUNC
10327 && !bfd_link_pic (info))
10328 {
10329 /* Set the value of ifunc symbols in a non-pie
10330 executable to the glink entry. This is to avoid
10331 text relocations. We can't do this for ifunc in
10332 allocate_dynrelocs, as we do for normal dynamic
10333 function symbols with plt entries, because we need
10334 to keep the original value around for the ifunc
10335 relocation. */
10336 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10337 (output_bfd, htab->glink->output_section));
10338 sym->st_value = (ent->glink_offset
10339 + htab->glink->output_offset
10340 + htab->glink->output_section->vma);
10341 }
10342 doneone = TRUE;
10343 }
10344
10345 if (htab->plt_type == PLT_NEW
10346 || !htab->elf.dynamic_sections_created
10347 || h->dynindx == -1)
10348 {
10349 unsigned char *p;
10350 asection *splt = htab->elf.splt;
10351 if (!htab->elf.dynamic_sections_created
10352 || h->dynindx == -1)
10353 splt = htab->elf.iplt;
10354
10355 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10356
10357 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10358 {
10359 bfd_put_32 (output_bfd, LWZ_11_3, p);
10360 p += 4;
10361 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10362 p += 4;
10363 bfd_put_32 (output_bfd, MR_0_3, p);
10364 p += 4;
10365 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10366 p += 4;
10367 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10368 p += 4;
10369 bfd_put_32 (output_bfd, BEQLR, p);
10370 p += 4;
10371 bfd_put_32 (output_bfd, MR_3_0, p);
10372 p += 4;
10373 bfd_put_32 (output_bfd, NOP, p);
10374 p += 4;
10375 }
10376
10377 write_glink_stub (ent, splt, p, info);
10378
10379 if (!bfd_link_pic (info))
10380 /* We only need one non-PIC glink stub. */
10381 break;
10382 }
10383 else
10384 break;
10385 }
10386
10387 if (h->needs_copy)
10388 {
10389 asection *s;
10390 Elf_Internal_Rela rela;
10391 bfd_byte *loc;
10392
10393 /* This symbols needs a copy reloc. Set it up. */
10394
10395 #ifdef DEBUG
10396 fprintf (stderr, ", copy");
10397 #endif
10398
10399 BFD_ASSERT (h->dynindx != -1);
10400
10401 if (ppc_elf_hash_entry (h)->has_sda_refs)
10402 s = htab->relsbss;
10403 else if (h->root.u.def.section == htab->elf.sdynrelro)
10404 s = htab->elf.sreldynrelro;
10405 else
10406 s = htab->elf.srelbss;
10407 BFD_ASSERT (s != NULL);
10408
10409 rela.r_offset = SYM_VAL (h);
10410 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10411 rela.r_addend = 0;
10412 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10413 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10414 }
10415
10416 #ifdef DEBUG
10417 fprintf (stderr, "\n");
10418 #endif
10419
10420 return TRUE;
10421 }
10422 \f
10423 static enum elf_reloc_type_class
10424 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10425 const asection *rel_sec,
10426 const Elf_Internal_Rela *rela)
10427 {
10428 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10429
10430 if (rel_sec == htab->elf.irelplt)
10431 return reloc_class_ifunc;
10432
10433 switch (ELF32_R_TYPE (rela->r_info))
10434 {
10435 case R_PPC_RELATIVE:
10436 return reloc_class_relative;
10437 case R_PPC_JMP_SLOT:
10438 return reloc_class_plt;
10439 case R_PPC_COPY:
10440 return reloc_class_copy;
10441 default:
10442 return reloc_class_normal;
10443 }
10444 }
10445 \f
10446 /* Finish up the dynamic sections. */
10447
10448 static bfd_boolean
10449 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10450 struct bfd_link_info *info)
10451 {
10452 asection *sdyn;
10453 struct ppc_elf_link_hash_table *htab;
10454 bfd_vma got;
10455 bfd *dynobj;
10456 bfd_boolean ret = TRUE;
10457
10458 #ifdef DEBUG
10459 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10460 #endif
10461
10462 htab = ppc_elf_hash_table (info);
10463 dynobj = htab->elf.dynobj;
10464 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10465
10466 got = 0;
10467 if (htab->elf.hgot != NULL)
10468 got = SYM_VAL (htab->elf.hgot);
10469
10470 if (htab->elf.dynamic_sections_created)
10471 {
10472 Elf32_External_Dyn *dyncon, *dynconend;
10473
10474 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10475
10476 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10477 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10478 for (; dyncon < dynconend; dyncon++)
10479 {
10480 Elf_Internal_Dyn dyn;
10481 asection *s;
10482
10483 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10484
10485 switch (dyn.d_tag)
10486 {
10487 case DT_PLTGOT:
10488 if (htab->is_vxworks)
10489 s = htab->elf.sgotplt;
10490 else
10491 s = htab->elf.splt;
10492 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10493 break;
10494
10495 case DT_PLTRELSZ:
10496 dyn.d_un.d_val = htab->elf.srelplt->size;
10497 break;
10498
10499 case DT_JMPREL:
10500 s = htab->elf.srelplt;
10501 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10502 break;
10503
10504 case DT_PPC_GOT:
10505 dyn.d_un.d_ptr = got;
10506 break;
10507
10508 case DT_TEXTREL:
10509 if (htab->local_ifunc_resolver)
10510 info->callbacks->einfo
10511 (_("%X%P: text relocations and GNU indirect "
10512 "functions will result in a segfault at runtime\n"));
10513 else if (htab->maybe_local_ifunc_resolver)
10514 info->callbacks->einfo
10515 (_("%P: warning: text relocations and GNU indirect "
10516 "functions may result in a segfault at runtime\n"));
10517 continue;
10518
10519 default:
10520 if (htab->is_vxworks
10521 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10522 break;
10523 continue;
10524 }
10525
10526 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10527 }
10528 }
10529
10530 if (htab->elf.sgot != NULL
10531 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10532 {
10533 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10534 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10535 {
10536 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10537
10538 p += htab->elf.hgot->root.u.def.value;
10539 if (htab->plt_type == PLT_OLD)
10540 {
10541 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10542 so that a function can easily find the address of
10543 _GLOBAL_OFFSET_TABLE_. */
10544 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10545 < htab->elf.hgot->root.u.def.section->size);
10546 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10547 }
10548
10549 if (sdyn != NULL)
10550 {
10551 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10552 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10553 < htab->elf.hgot->root.u.def.section->size);
10554 bfd_put_32 (output_bfd, val, p);
10555 }
10556 }
10557 else
10558 {
10559 /* xgettext:c-format */
10560 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10561 htab->elf.hgot->root.root.string,
10562 (htab->elf.sgotplt != NULL
10563 ? htab->elf.sgotplt->name
10564 : htab->elf.sgot->name));
10565 bfd_set_error (bfd_error_bad_value);
10566 ret = FALSE;
10567 }
10568
10569 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10570 }
10571
10572 /* Fill in the first entry in the VxWorks procedure linkage table. */
10573 if (htab->is_vxworks
10574 && htab->elf.splt != NULL
10575 && htab->elf.splt->size != 0
10576 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10577 {
10578 asection *splt = htab->elf.splt;
10579 /* Use the right PLT. */
10580 const bfd_vma *plt_entry = (bfd_link_pic (info)
10581 ? ppc_elf_vxworks_pic_plt0_entry
10582 : ppc_elf_vxworks_plt0_entry);
10583
10584 if (!bfd_link_pic (info))
10585 {
10586 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10587
10588 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10589 splt->contents + 0);
10590 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10591 splt->contents + 4);
10592 }
10593 else
10594 {
10595 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10596 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10597 }
10598 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10599 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10600 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10601 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10602 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10603 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10604
10605 if (! bfd_link_pic (info))
10606 {
10607 Elf_Internal_Rela rela;
10608 bfd_byte *loc;
10609
10610 loc = htab->srelplt2->contents;
10611
10612 /* Output the @ha relocation for the first instruction. */
10613 rela.r_offset = (htab->elf.splt->output_section->vma
10614 + htab->elf.splt->output_offset
10615 + 2);
10616 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10617 rela.r_addend = 0;
10618 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10619 loc += sizeof (Elf32_External_Rela);
10620
10621 /* Output the @l relocation for the second instruction. */
10622 rela.r_offset = (htab->elf.splt->output_section->vma
10623 + htab->elf.splt->output_offset
10624 + 6);
10625 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10626 rela.r_addend = 0;
10627 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10628 loc += sizeof (Elf32_External_Rela);
10629
10630 /* Fix up the remaining relocations. They may have the wrong
10631 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10632 in which symbols were output. */
10633 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10634 {
10635 Elf_Internal_Rela rel;
10636
10637 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10638 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10639 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10640 loc += sizeof (Elf32_External_Rela);
10641
10642 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10643 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10644 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10645 loc += sizeof (Elf32_External_Rela);
10646
10647 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10648 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10649 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10650 loc += sizeof (Elf32_External_Rela);
10651 }
10652 }
10653 }
10654
10655 if (htab->glink != NULL
10656 && htab->glink->contents != NULL
10657 && htab->elf.dynamic_sections_created)
10658 {
10659 unsigned char *p;
10660 unsigned char *endp;
10661 bfd_vma res0;
10662 unsigned int i;
10663
10664 /*
10665 * PIC glink code is the following:
10666 *
10667 * # ith PLT code stub.
10668 * addis 11,30,(plt+(i-1)*4-got)@ha
10669 * lwz 11,(plt+(i-1)*4-got)@l(11)
10670 * mtctr 11
10671 * bctr
10672 *
10673 * # A table of branches, one for each plt entry.
10674 * # The idea is that the plt call stub loads ctr and r11 with these
10675 * # addresses, so (r11 - res_0) gives the plt index * 4.
10676 * res_0: b PLTresolve
10677 * res_1: b PLTresolve
10678 * .
10679 * # Some number of entries towards the end can be nops
10680 * res_n_m3: nop
10681 * res_n_m2: nop
10682 * res_n_m1:
10683 *
10684 * PLTresolve:
10685 * addis 11,11,(1f-res_0)@ha
10686 * mflr 0
10687 * bcl 20,31,1f
10688 * 1: addi 11,11,(1b-res_0)@l
10689 * mflr 12
10690 * mtlr 0
10691 * sub 11,11,12 # r11 = index * 4
10692 * addis 12,12,(got+4-1b)@ha
10693 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10694 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10695 * mtctr 0
10696 * add 0,11,11
10697 * add 11,0,11 # r11 = index * 12 = reloc offset.
10698 * bctr
10699 */
10700 static const unsigned int pic_plt_resolve[] =
10701 {
10702 ADDIS_11_11,
10703 MFLR_0,
10704 BCL_20_31,
10705 ADDI_11_11,
10706 MFLR_12,
10707 MTLR_0,
10708 SUB_11_11_12,
10709 ADDIS_12_12,
10710 LWZ_0_12,
10711 LWZ_12_12,
10712 MTCTR_0,
10713 ADD_0_11_11,
10714 ADD_11_0_11,
10715 BCTR,
10716 NOP,
10717 NOP
10718 };
10719
10720 /*
10721 * Non-PIC glink code is a little simpler.
10722 *
10723 * # ith PLT code stub.
10724 * lis 11,(plt+(i-1)*4)@ha
10725 * lwz 11,(plt+(i-1)*4)@l(11)
10726 * mtctr 11
10727 * bctr
10728 *
10729 * The branch table is the same, then comes
10730 *
10731 * PLTresolve:
10732 * lis 12,(got+4)@ha
10733 * addis 11,11,(-res_0)@ha
10734 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10735 * addi 11,11,(-res_0)@l # r11 = index * 4
10736 * mtctr 0
10737 * add 0,11,11
10738 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10739 * add 11,0,11 # r11 = index * 12 = reloc offset.
10740 * bctr
10741 */
10742 static const unsigned int plt_resolve[] =
10743 {
10744 LIS_12,
10745 ADDIS_11_11,
10746 LWZ_0_12,
10747 ADDI_11_11,
10748 MTCTR_0,
10749 ADD_0_11_11,
10750 LWZ_12_12,
10751 ADD_11_0_11,
10752 BCTR,
10753 NOP,
10754 NOP,
10755 NOP,
10756 NOP,
10757 NOP,
10758 NOP,
10759 NOP
10760 };
10761
10762 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10763 abort ();
10764 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10765 abort ();
10766
10767 /* Build the branch table, one for each plt entry (less one),
10768 and perhaps some padding. */
10769 p = htab->glink->contents;
10770 p += htab->glink_pltresolve;
10771 endp = htab->glink->contents;
10772 endp += htab->glink->size - GLINK_PLTRESOLVE;
10773 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10774 {
10775 bfd_put_32 (output_bfd, B + endp - p, p);
10776 p += 4;
10777 }
10778 while (p < endp)
10779 {
10780 bfd_put_32 (output_bfd, NOP, p);
10781 p += 4;
10782 }
10783
10784 res0 = (htab->glink_pltresolve
10785 + htab->glink->output_section->vma
10786 + htab->glink->output_offset);
10787
10788 if (htab->params->ppc476_workaround)
10789 {
10790 /* Ensure that a call stub at the end of a page doesn't
10791 result in prefetch over the end of the page into the
10792 glink branch table. */
10793 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10794 bfd_vma page_addr;
10795 bfd_vma glink_start = (htab->glink->output_section->vma
10796 + htab->glink->output_offset);
10797
10798 for (page_addr = res0 & -pagesize;
10799 page_addr > glink_start;
10800 page_addr -= pagesize)
10801 {
10802 /* We have a plt call stub that may need fixing. */
10803 bfd_byte *loc;
10804 unsigned int insn;
10805
10806 loc = htab->glink->contents + page_addr - 4 - glink_start;
10807 insn = bfd_get_32 (output_bfd, loc);
10808 if (insn == BCTR)
10809 {
10810 /* By alignment, we know that there must be at least
10811 one other call stub before this one. */
10812 insn = bfd_get_32 (output_bfd, loc - 16);
10813 if (insn == BCTR)
10814 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10815 else
10816 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10817 }
10818 }
10819 }
10820
10821 /* Last comes the PLTresolve stub. */
10822 if (bfd_link_pic (info))
10823 {
10824 bfd_vma bcl;
10825
10826 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10827 {
10828 unsigned int insn = pic_plt_resolve[i];
10829
10830 if (htab->params->ppc476_workaround && insn == NOP)
10831 insn = BA + 0;
10832 bfd_put_32 (output_bfd, insn, p);
10833 p += 4;
10834 }
10835 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10836
10837 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10838 + htab->glink->output_section->vma
10839 + htab->glink->output_offset);
10840
10841 bfd_put_32 (output_bfd,
10842 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10843 bfd_put_32 (output_bfd,
10844 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10845 bfd_put_32 (output_bfd,
10846 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10847 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10848 {
10849 bfd_put_32 (output_bfd,
10850 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10851 bfd_put_32 (output_bfd,
10852 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10853 }
10854 else
10855 {
10856 bfd_put_32 (output_bfd,
10857 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10858 bfd_put_32 (output_bfd,
10859 LWZ_12_12 + 4, p + 9*4);
10860 }
10861 }
10862 else
10863 {
10864 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10865 {
10866 unsigned int insn = plt_resolve[i];
10867
10868 if (htab->params->ppc476_workaround && insn == NOP)
10869 insn = BA + 0;
10870 bfd_put_32 (output_bfd, insn, p);
10871 p += 4;
10872 }
10873 p -= 4 * ARRAY_SIZE (plt_resolve);
10874
10875 bfd_put_32 (output_bfd,
10876 LIS_12 + PPC_HA (got + 4), p + 0*4);
10877 bfd_put_32 (output_bfd,
10878 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10879 bfd_put_32 (output_bfd,
10880 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10881 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10882 {
10883 bfd_put_32 (output_bfd,
10884 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10885 bfd_put_32 (output_bfd,
10886 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10887 }
10888 else
10889 {
10890 bfd_put_32 (output_bfd,
10891 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10892 bfd_put_32 (output_bfd,
10893 LWZ_12_12 + 4, p + 6*4);
10894 }
10895 }
10896 }
10897
10898 if (htab->glink_eh_frame != NULL
10899 && htab->glink_eh_frame->contents != NULL)
10900 {
10901 unsigned char *p = htab->glink_eh_frame->contents;
10902 bfd_vma val;
10903
10904 p += sizeof (glink_eh_frame_cie);
10905 /* FDE length. */
10906 p += 4;
10907 /* CIE pointer. */
10908 p += 4;
10909 /* Offset to .glink. */
10910 val = (htab->glink->output_section->vma
10911 + htab->glink->output_offset);
10912 val -= (htab->glink_eh_frame->output_section->vma
10913 + htab->glink_eh_frame->output_offset);
10914 val -= p - htab->glink_eh_frame->contents;
10915 bfd_put_32 (htab->elf.dynobj, val, p);
10916
10917 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10918 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10919 htab->glink_eh_frame,
10920 htab->glink_eh_frame->contents))
10921 return FALSE;
10922 }
10923
10924 return ret;
10925 }
10926 \f
10927 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10928 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10929 #define TARGET_BIG_SYM powerpc_elf32_vec
10930 #define TARGET_BIG_NAME "elf32-powerpc"
10931 #define ELF_ARCH bfd_arch_powerpc
10932 #define ELF_TARGET_ID PPC32_ELF_DATA
10933 #define ELF_MACHINE_CODE EM_PPC
10934 #ifdef __QNXTARGET__
10935 #define ELF_MAXPAGESIZE 0x1000
10936 #define ELF_COMMONPAGESIZE 0x1000
10937 #else
10938 #define ELF_MAXPAGESIZE 0x10000
10939 #define ELF_COMMONPAGESIZE 0x10000
10940 #endif
10941 #define ELF_MINPAGESIZE 0x1000
10942 #define elf_info_to_howto ppc_elf_info_to_howto
10943
10944 #ifdef EM_CYGNUS_POWERPC
10945 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10946 #endif
10947
10948 #ifdef EM_PPC_OLD
10949 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10950 #endif
10951
10952 #define elf_backend_plt_not_loaded 1
10953 #define elf_backend_want_dynrelro 1
10954 #define elf_backend_can_gc_sections 1
10955 #define elf_backend_can_refcount 1
10956 #define elf_backend_rela_normal 1
10957 #define elf_backend_caches_rawsize 1
10958
10959 #define bfd_elf32_mkobject ppc_elf_mkobject
10960 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10961 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10962 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10963 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10964 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10965 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10966 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10967
10968 #define elf_backend_object_p ppc_elf_object_p
10969 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10970 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10971 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10972 #define elf_backend_relocate_section ppc_elf_relocate_section
10973 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10974 #define elf_backend_check_relocs ppc_elf_check_relocs
10975 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10976 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10977 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10978 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10979 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10980 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10981 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10982 #define elf_backend_fake_sections ppc_elf_fake_sections
10983 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10984 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10985 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10986 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10987 #define elf_backend_write_core_note ppc_elf_write_core_note
10988 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10989 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10990 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10991 #define elf_backend_write_section ppc_elf_write_section
10992 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10993 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10994 #define elf_backend_action_discarded ppc_elf_action_discarded
10995 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10996 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10997
10998 #include "elf32-target.h"
10999
11000 /* FreeBSD Target */
11001
11002 #undef TARGET_LITTLE_SYM
11003 #undef TARGET_LITTLE_NAME
11004
11005 #undef TARGET_BIG_SYM
11006 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11007 #undef TARGET_BIG_NAME
11008 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11009
11010 #undef ELF_OSABI
11011 #define ELF_OSABI ELFOSABI_FREEBSD
11012
11013 #undef elf32_bed
11014 #define elf32_bed elf32_powerpc_fbsd_bed
11015
11016 #include "elf32-target.h"
11017
11018 /* VxWorks Target */
11019
11020 #undef TARGET_LITTLE_SYM
11021 #undef TARGET_LITTLE_NAME
11022
11023 #undef TARGET_BIG_SYM
11024 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11025 #undef TARGET_BIG_NAME
11026 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11027
11028 #undef ELF_OSABI
11029
11030 /* VxWorks uses the elf default section flags for .plt. */
11031 static const struct bfd_elf_special_section *
11032 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11033 {
11034 if (sec->name == NULL)
11035 return NULL;
11036
11037 if (strcmp (sec->name, ".plt") == 0)
11038 return _bfd_elf_get_sec_type_attr (abfd, sec);
11039
11040 return ppc_elf_get_sec_type_attr (abfd, sec);
11041 }
11042
11043 /* Like ppc_elf_link_hash_table_create, but overrides
11044 appropriately for VxWorks. */
11045 static struct bfd_link_hash_table *
11046 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11047 {
11048 struct bfd_link_hash_table *ret;
11049
11050 ret = ppc_elf_link_hash_table_create (abfd);
11051 if (ret)
11052 {
11053 struct ppc_elf_link_hash_table *htab
11054 = (struct ppc_elf_link_hash_table *)ret;
11055 htab->is_vxworks = 1;
11056 htab->plt_type = PLT_VXWORKS;
11057 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11058 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11059 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11060 }
11061 return ret;
11062 }
11063
11064 /* Tweak magic VxWorks symbols as they are loaded. */
11065 static bfd_boolean
11066 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11067 struct bfd_link_info *info,
11068 Elf_Internal_Sym *sym,
11069 const char **namep,
11070 flagword *flagsp,
11071 asection **secp,
11072 bfd_vma *valp)
11073 {
11074 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11075 valp))
11076 return FALSE;
11077
11078 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11079 }
11080
11081 static void
11082 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11083 {
11084 ppc_elf_final_write_processing (abfd, linker);
11085 elf_vxworks_final_write_processing (abfd, linker);
11086 }
11087
11088 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11089 define it. */
11090 #undef elf_backend_want_plt_sym
11091 #define elf_backend_want_plt_sym 1
11092 #undef elf_backend_want_got_plt
11093 #define elf_backend_want_got_plt 1
11094 #undef elf_backend_got_symbol_offset
11095 #define elf_backend_got_symbol_offset 0
11096 #undef elf_backend_plt_not_loaded
11097 #define elf_backend_plt_not_loaded 0
11098 #undef elf_backend_plt_readonly
11099 #define elf_backend_plt_readonly 1
11100 #undef elf_backend_got_header_size
11101 #define elf_backend_got_header_size 12
11102 #undef elf_backend_dtrel_excludes_plt
11103 #define elf_backend_dtrel_excludes_plt 1
11104
11105 #undef bfd_elf32_get_synthetic_symtab
11106
11107 #undef bfd_elf32_bfd_link_hash_table_create
11108 #define bfd_elf32_bfd_link_hash_table_create \
11109 ppc_elf_vxworks_link_hash_table_create
11110 #undef elf_backend_add_symbol_hook
11111 #define elf_backend_add_symbol_hook \
11112 ppc_elf_vxworks_add_symbol_hook
11113 #undef elf_backend_link_output_symbol_hook
11114 #define elf_backend_link_output_symbol_hook \
11115 elf_vxworks_link_output_symbol_hook
11116 #undef elf_backend_final_write_processing
11117 #define elf_backend_final_write_processing \
11118 ppc_elf_vxworks_final_write_processing
11119 #undef elf_backend_get_sec_type_attr
11120 #define elf_backend_get_sec_type_attr \
11121 ppc_elf_vxworks_get_sec_type_attr
11122 #undef elf_backend_emit_relocs
11123 #define elf_backend_emit_relocs \
11124 elf_vxworks_emit_relocs
11125
11126 #undef elf32_bed
11127 #define elf32_bed ppc_elf_vxworks_bed
11128 #undef elf_backend_post_process_headers
11129
11130 #include "elf32-target.h"