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[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 && h->root.type == bfd_link_hash_undefweak
5951 && h->dynindx == -1
5952 && !h->forced_local
5953 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5954 return bfd_elf_link_record_dynamic_symbol (info, h);
5955 return TRUE;
5956 }
5957
5958 /* Allocate space in associated reloc sections for dynamic relocs. */
5959
5960 static bfd_boolean
5961 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5962 {
5963 struct bfd_link_info *info = inf;
5964 struct ppc_elf_link_hash_entry *eh;
5965 struct ppc_elf_link_hash_table *htab;
5966 struct elf_dyn_relocs *p;
5967 bfd_boolean dyn;
5968
5969 if (h->root.type == bfd_link_hash_indirect)
5970 return TRUE;
5971
5972 htab = ppc_elf_hash_table (info);
5973 eh = (struct ppc_elf_link_hash_entry *) h;
5974 if (eh->elf.got.refcount > 0
5975 || (ELIMINATE_COPY_RELOCS
5976 && !eh->elf.def_regular
5977 && eh->elf.protected_def
5978 && eh->has_addr16_ha
5979 && eh->has_addr16_lo
5980 && htab->params->pic_fixup > 0))
5981 {
5982 unsigned int need;
5983
5984 /* Make sure this symbol is output as a dynamic symbol.
5985 Undefined weak syms won't yet be marked as dynamic. */
5986 if (!ensure_undefweak_dynamic (info, &eh->elf))
5987 return FALSE;
5988
5989 need = 0;
5990 if ((eh->tls_mask & TLS_TLS) != 0)
5991 {
5992 if ((eh->tls_mask & TLS_LD) != 0)
5993 {
5994 if (!eh->elf.def_dynamic)
5995 /* We'll just use htab->tlsld_got.offset. This should
5996 always be the case. It's a little odd if we have
5997 a local dynamic reloc against a non-local symbol. */
5998 htab->tlsld_got.refcount += 1;
5999 else
6000 need += 8;
6001 }
6002 if ((eh->tls_mask & TLS_GD) != 0)
6003 need += 8;
6004 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6005 need += 4;
6006 if ((eh->tls_mask & TLS_DTPREL) != 0)
6007 need += 4;
6008 }
6009 else
6010 need += 4;
6011 if (need == 0)
6012 eh->elf.got.offset = (bfd_vma) -1;
6013 else
6014 {
6015 eh->elf.got.offset = allocate_got (htab, need);
6016 if ((bfd_link_pic (info)
6017 || (htab->elf.dynamic_sections_created
6018 && eh->elf.dynindx != -1
6019 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6020 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6021 || eh->elf.root.type != bfd_link_hash_undefweak))
6022 {
6023 asection *rsec = htab->elf.srelgot;
6024
6025 if (eh->elf.type == STT_GNU_IFUNC)
6026 rsec = htab->elf.irelplt;
6027 /* All the entries we allocated need relocs.
6028 Except LD only needs one. */
6029 if ((eh->tls_mask & TLS_LD) != 0
6030 && eh->elf.def_dynamic)
6031 need -= 4;
6032 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6033 }
6034 }
6035 }
6036 else
6037 eh->elf.got.offset = (bfd_vma) -1;
6038
6039 if (!htab->elf.dynamic_sections_created
6040 && h->type != STT_GNU_IFUNC)
6041 eh->dyn_relocs = NULL;
6042
6043 if (eh->dyn_relocs == NULL)
6044 ;
6045
6046 /* In the shared -Bsymbolic case, discard space allocated for
6047 dynamic pc-relative relocs against symbols which turn out to be
6048 defined in regular objects. For the normal shared case, discard
6049 space for relocs that have become local due to symbol visibility
6050 changes. */
6051 else if (bfd_link_pic (info))
6052 {
6053 /* Relocs that use pc_count are those that appear on a call insn,
6054 or certain REL relocs (see must_be_dyn_reloc) that can be
6055 generated via assembly. We want calls to protected symbols to
6056 resolve directly to the function rather than going via the plt.
6057 If people want function pointer comparisons to work as expected
6058 then they should avoid writing weird assembly. */
6059 if (SYMBOL_CALLS_LOCAL (info, h))
6060 {
6061 struct elf_dyn_relocs **pp;
6062
6063 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6064 {
6065 p->count -= p->pc_count;
6066 p->pc_count = 0;
6067 if (p->count == 0)
6068 *pp = p->next;
6069 else
6070 pp = &p->next;
6071 }
6072 }
6073
6074 if (htab->is_vxworks)
6075 {
6076 struct elf_dyn_relocs **pp;
6077
6078 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6079 {
6080 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6081 *pp = p->next;
6082 else
6083 pp = &p->next;
6084 }
6085 }
6086
6087 /* Discard relocs on undefined symbols that must be local. */
6088 if (eh->dyn_relocs != NULL
6089 && h->root.type == bfd_link_hash_undefined
6090 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6091 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6092 eh->dyn_relocs = NULL;
6093
6094 /* Also discard relocs on undefined weak syms with non-default
6095 visibility. */
6096 if (eh->dyn_relocs != NULL
6097 && h->root.type == bfd_link_hash_undefweak)
6098 {
6099 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6100 eh->dyn_relocs = NULL;
6101
6102 /* Make sure undefined weak symbols are output as a dynamic
6103 symbol in PIEs. */
6104 else if (!ensure_undefweak_dynamic (info, h))
6105 return FALSE;
6106 }
6107 }
6108 else if (ELIMINATE_COPY_RELOCS)
6109 {
6110 /* For the non-pic case, discard space for relocs against
6111 symbols which turn out to need copy relocs or are not
6112 dynamic. */
6113 if (!h->non_got_ref
6114 && !h->def_regular
6115 && !(h->protected_def
6116 && eh->has_addr16_ha
6117 && eh->has_addr16_lo
6118 && htab->params->pic_fixup > 0))
6119 {
6120 /* Make sure this symbol is output as a dynamic symbol.
6121 Undefined weak syms won't yet be marked as dynamic. */
6122 if (!ensure_undefweak_dynamic (info, h))
6123 return FALSE;
6124
6125 if (h->dynindx == -1)
6126 eh->dyn_relocs = NULL;
6127 }
6128 else
6129 eh->dyn_relocs = NULL;
6130 }
6131
6132 /* Allocate space. */
6133 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6134 {
6135 asection *sreloc = elf_section_data (p->sec)->sreloc;
6136 if (eh->elf.type == STT_GNU_IFUNC)
6137 sreloc = htab->elf.irelplt;
6138 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6139 }
6140
6141 /* Handle PLT relocs. Done last, after dynindx has settled. */
6142 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6143 if (dyn || h->type == STT_GNU_IFUNC)
6144 {
6145 struct plt_entry *ent;
6146 bfd_boolean doneone = FALSE;
6147 bfd_vma plt_offset = 0, glink_offset = 0;
6148
6149 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6150 if (ent->plt.refcount > 0)
6151 {
6152 asection *s = htab->elf.splt;
6153
6154 if (!dyn)
6155 s = htab->elf.iplt;
6156
6157 if (htab->plt_type == PLT_NEW || !dyn)
6158 {
6159 if (!doneone)
6160 {
6161 plt_offset = s->size;
6162 s->size += 4;
6163 }
6164 ent->plt.offset = plt_offset;
6165
6166 s = htab->glink;
6167 if (!doneone || bfd_link_pic (info))
6168 {
6169 glink_offset = s->size;
6170 s->size += GLINK_ENTRY_SIZE;
6171 if (h == htab->tls_get_addr
6172 && !htab->params->no_tls_get_addr_opt)
6173 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6174 }
6175 if (!doneone
6176 && !bfd_link_pic (info)
6177 && h->def_dynamic
6178 && !h->def_regular)
6179 {
6180 h->root.u.def.section = s;
6181 h->root.u.def.value = glink_offset;
6182 }
6183 ent->glink_offset = glink_offset;
6184
6185 if (htab->params->emit_stub_syms
6186 && !add_stub_sym (ent, h, info))
6187 return FALSE;
6188 }
6189 else
6190 {
6191 if (!doneone)
6192 {
6193 /* If this is the first .plt entry, make room
6194 for the special first entry. */
6195 if (s->size == 0)
6196 s->size += htab->plt_initial_entry_size;
6197
6198 /* The PowerPC PLT is actually composed of two
6199 parts, the first part is 2 words (for a load
6200 and a jump), and then there is a remaining
6201 word available at the end. */
6202 plt_offset = (htab->plt_initial_entry_size
6203 + (htab->plt_slot_size
6204 * ((s->size
6205 - htab->plt_initial_entry_size)
6206 / htab->plt_entry_size)));
6207
6208 /* If this symbol is not defined in a regular
6209 file, and we are not generating a shared
6210 library, then set the symbol to this location
6211 in the .plt. This is to avoid text
6212 relocations, and is required to make
6213 function pointers compare as equal between
6214 the normal executable and the shared library. */
6215 if (! bfd_link_pic (info)
6216 && h->def_dynamic
6217 && !h->def_regular)
6218 {
6219 h->root.u.def.section = s;
6220 h->root.u.def.value = plt_offset;
6221 }
6222
6223 /* Make room for this entry. */
6224 s->size += htab->plt_entry_size;
6225 /* After the 8192nd entry, room for two entries
6226 is allocated. */
6227 if (htab->plt_type == PLT_OLD
6228 && (s->size - htab->plt_initial_entry_size)
6229 / htab->plt_entry_size
6230 > PLT_NUM_SINGLE_ENTRIES)
6231 s->size += htab->plt_entry_size;
6232 }
6233 ent->plt.offset = plt_offset;
6234 }
6235
6236 /* We also need to make an entry in the .rela.plt section. */
6237 if (!doneone)
6238 {
6239 if (!dyn)
6240 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6241 else
6242 {
6243 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6244
6245 if (htab->plt_type == PLT_VXWORKS)
6246 {
6247 /* Allocate space for the unloaded relocations. */
6248 if (!bfd_link_pic (info)
6249 && htab->elf.dynamic_sections_created)
6250 {
6251 if (ent->plt.offset
6252 == (bfd_vma) htab->plt_initial_entry_size)
6253 {
6254 htab->srelplt2->size
6255 += (sizeof (Elf32_External_Rela)
6256 * VXWORKS_PLTRESOLVE_RELOCS);
6257 }
6258
6259 htab->srelplt2->size
6260 += (sizeof (Elf32_External_Rela)
6261 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6262 }
6263
6264 /* Every PLT entry has an associated GOT entry in
6265 .got.plt. */
6266 htab->elf.sgotplt->size += 4;
6267 }
6268 }
6269 doneone = TRUE;
6270 }
6271 }
6272 else
6273 ent->plt.offset = (bfd_vma) -1;
6274
6275 if (!doneone)
6276 {
6277 h->plt.plist = NULL;
6278 h->needs_plt = 0;
6279 }
6280 }
6281 else
6282 {
6283 h->plt.plist = NULL;
6284 h->needs_plt = 0;
6285 }
6286
6287 return TRUE;
6288 }
6289
6290 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6291 read-only sections. */
6292
6293 static bfd_boolean
6294 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6295 {
6296 if (h->root.type == bfd_link_hash_indirect)
6297 return TRUE;
6298
6299 if (readonly_dynrelocs (h))
6300 {
6301 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6302
6303 /* Not an error, just cut short the traversal. */
6304 return FALSE;
6305 }
6306 return TRUE;
6307 }
6308
6309 static const unsigned char glink_eh_frame_cie[] =
6310 {
6311 0, 0, 0, 16, /* length. */
6312 0, 0, 0, 0, /* id. */
6313 1, /* CIE version. */
6314 'z', 'R', 0, /* Augmentation string. */
6315 4, /* Code alignment. */
6316 0x7c, /* Data alignment. */
6317 65, /* RA reg. */
6318 1, /* Augmentation size. */
6319 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6320 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6321 };
6322
6323 /* Set the sizes of the dynamic sections. */
6324
6325 static bfd_boolean
6326 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6327 struct bfd_link_info *info)
6328 {
6329 struct ppc_elf_link_hash_table *htab;
6330 asection *s;
6331 bfd_boolean relocs;
6332 bfd *ibfd;
6333
6334 #ifdef DEBUG
6335 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6336 #endif
6337
6338 htab = ppc_elf_hash_table (info);
6339 BFD_ASSERT (htab->elf.dynobj != NULL);
6340
6341 if (elf_hash_table (info)->dynamic_sections_created)
6342 {
6343 /* Set the contents of the .interp section to the interpreter. */
6344 if (bfd_link_executable (info) && !info->nointerp)
6345 {
6346 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6347 BFD_ASSERT (s != NULL);
6348 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6349 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6350 }
6351 }
6352
6353 if (htab->plt_type == PLT_OLD)
6354 htab->got_header_size = 16;
6355 else if (htab->plt_type == PLT_NEW)
6356 htab->got_header_size = 12;
6357
6358 /* Set up .got offsets for local syms, and space for local dynamic
6359 relocs. */
6360 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6361 {
6362 bfd_signed_vma *local_got;
6363 bfd_signed_vma *end_local_got;
6364 struct plt_entry **local_plt;
6365 struct plt_entry **end_local_plt;
6366 char *lgot_masks;
6367 bfd_size_type locsymcount;
6368 Elf_Internal_Shdr *symtab_hdr;
6369
6370 if (!is_ppc_elf (ibfd))
6371 continue;
6372
6373 for (s = ibfd->sections; s != NULL; s = s->next)
6374 {
6375 struct ppc_dyn_relocs *p;
6376
6377 for (p = ((struct ppc_dyn_relocs *)
6378 elf_section_data (s)->local_dynrel);
6379 p != NULL;
6380 p = p->next)
6381 {
6382 if (!bfd_is_abs_section (p->sec)
6383 && bfd_is_abs_section (p->sec->output_section))
6384 {
6385 /* Input section has been discarded, either because
6386 it is a copy of a linkonce section or due to
6387 linker script /DISCARD/, so we'll be discarding
6388 the relocs too. */
6389 }
6390 else if (htab->is_vxworks
6391 && strcmp (p->sec->output_section->name,
6392 ".tls_vars") == 0)
6393 {
6394 /* Relocations in vxworks .tls_vars sections are
6395 handled specially by the loader. */
6396 }
6397 else if (p->count != 0)
6398 {
6399 asection *sreloc = elf_section_data (p->sec)->sreloc;
6400 if (p->ifunc)
6401 sreloc = htab->elf.irelplt;
6402 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6403 if ((p->sec->output_section->flags
6404 & (SEC_READONLY | SEC_ALLOC))
6405 == (SEC_READONLY | SEC_ALLOC))
6406 info->flags |= DF_TEXTREL;
6407 }
6408 }
6409 }
6410
6411 local_got = elf_local_got_refcounts (ibfd);
6412 if (!local_got)
6413 continue;
6414
6415 symtab_hdr = &elf_symtab_hdr (ibfd);
6416 locsymcount = symtab_hdr->sh_info;
6417 end_local_got = local_got + locsymcount;
6418 local_plt = (struct plt_entry **) end_local_got;
6419 end_local_plt = local_plt + locsymcount;
6420 lgot_masks = (char *) end_local_plt;
6421
6422 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6423 if (*local_got > 0)
6424 {
6425 unsigned int need = 0;
6426 if ((*lgot_masks & TLS_TLS) != 0)
6427 {
6428 if ((*lgot_masks & TLS_GD) != 0)
6429 need += 8;
6430 if ((*lgot_masks & TLS_LD) != 0)
6431 htab->tlsld_got.refcount += 1;
6432 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6433 need += 4;
6434 if ((*lgot_masks & TLS_DTPREL) != 0)
6435 need += 4;
6436 }
6437 else
6438 need += 4;
6439 if (need == 0)
6440 *local_got = (bfd_vma) -1;
6441 else
6442 {
6443 *local_got = allocate_got (htab, need);
6444 if (bfd_link_pic (info))
6445 {
6446 asection *srel = htab->elf.srelgot;
6447 if ((*lgot_masks & PLT_IFUNC) != 0)
6448 srel = htab->elf.irelplt;
6449 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6450 }
6451 }
6452 }
6453 else
6454 *local_got = (bfd_vma) -1;
6455
6456 if (htab->is_vxworks)
6457 continue;
6458
6459 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6460 for (; local_plt < end_local_plt; ++local_plt)
6461 {
6462 struct plt_entry *ent;
6463 bfd_boolean doneone = FALSE;
6464 bfd_vma plt_offset = 0, glink_offset = 0;
6465
6466 for (ent = *local_plt; ent != NULL; ent = ent->next)
6467 if (ent->plt.refcount > 0)
6468 {
6469 s = htab->elf.iplt;
6470
6471 if (!doneone)
6472 {
6473 plt_offset = s->size;
6474 s->size += 4;
6475 }
6476 ent->plt.offset = plt_offset;
6477
6478 s = htab->glink;
6479 if (!doneone || bfd_link_pic (info))
6480 {
6481 glink_offset = s->size;
6482 s->size += GLINK_ENTRY_SIZE;
6483 }
6484 ent->glink_offset = glink_offset;
6485
6486 if (!doneone)
6487 {
6488 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6489 doneone = TRUE;
6490 }
6491 }
6492 else
6493 ent->plt.offset = (bfd_vma) -1;
6494 }
6495 }
6496
6497 /* Allocate space for global sym dynamic relocs. */
6498 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6499
6500 if (htab->tlsld_got.refcount > 0)
6501 {
6502 htab->tlsld_got.offset = allocate_got (htab, 8);
6503 if (bfd_link_pic (info))
6504 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6505 }
6506 else
6507 htab->tlsld_got.offset = (bfd_vma) -1;
6508
6509 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6510 {
6511 unsigned int g_o_t = 32768;
6512
6513 /* If we haven't allocated the header, do so now. When we get here,
6514 for old plt/got the got size will be 0 to 32764 (not allocated),
6515 or 32780 to 65536 (header allocated). For new plt/got, the
6516 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6517 if (htab->elf.sgot->size <= 32768)
6518 {
6519 g_o_t = htab->elf.sgot->size;
6520 if (htab->plt_type == PLT_OLD)
6521 g_o_t += 4;
6522 htab->elf.sgot->size += htab->got_header_size;
6523 }
6524
6525 htab->elf.hgot->root.u.def.value = g_o_t;
6526 }
6527 if (bfd_link_pic (info))
6528 {
6529 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6530
6531 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6532 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6533 }
6534 if (info->emitrelocations)
6535 {
6536 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6537
6538 if (sda != NULL && sda->ref_regular)
6539 sda->root.u.def.section->flags |= SEC_KEEP;
6540 sda = htab->sdata[1].sym;
6541 if (sda != NULL && sda->ref_regular)
6542 sda->root.u.def.section->flags |= SEC_KEEP;
6543 }
6544
6545 if (htab->glink != NULL
6546 && htab->glink->size != 0
6547 && htab->elf.dynamic_sections_created)
6548 {
6549 htab->glink_pltresolve = htab->glink->size;
6550 /* Space for the branch table. ??? We don't need entries for
6551 non-dynamic symbols in this table. This case can arise with
6552 static ifuncs or forced local ifuncs. */
6553 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6554 /* Pad out to align the start of PLTresolve. */
6555 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6556 ? 63 : 15);
6557 htab->glink->size += GLINK_PLTRESOLVE;
6558
6559 if (htab->params->emit_stub_syms)
6560 {
6561 struct elf_link_hash_entry *sh;
6562 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6563 TRUE, FALSE, FALSE);
6564 if (sh == NULL)
6565 return FALSE;
6566 if (sh->root.type == bfd_link_hash_new)
6567 {
6568 sh->root.type = bfd_link_hash_defined;
6569 sh->root.u.def.section = htab->glink;
6570 sh->root.u.def.value = htab->glink_pltresolve;
6571 sh->ref_regular = 1;
6572 sh->def_regular = 1;
6573 sh->ref_regular_nonweak = 1;
6574 sh->forced_local = 1;
6575 sh->non_elf = 0;
6576 sh->root.linker_def = 1;
6577 }
6578 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6579 TRUE, FALSE, FALSE);
6580 if (sh == NULL)
6581 return FALSE;
6582 if (sh->root.type == bfd_link_hash_new)
6583 {
6584 sh->root.type = bfd_link_hash_defined;
6585 sh->root.u.def.section = htab->glink;
6586 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6587 sh->ref_regular = 1;
6588 sh->def_regular = 1;
6589 sh->ref_regular_nonweak = 1;
6590 sh->forced_local = 1;
6591 sh->non_elf = 0;
6592 sh->root.linker_def = 1;
6593 }
6594 }
6595 }
6596
6597 if (htab->glink != NULL
6598 && htab->glink->size != 0
6599 && htab->glink_eh_frame != NULL
6600 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6601 && _bfd_elf_eh_frame_present (info))
6602 {
6603 s = htab->glink_eh_frame;
6604 s->size = sizeof (glink_eh_frame_cie) + 20;
6605 if (bfd_link_pic (info))
6606 {
6607 s->size += 4;
6608 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6609 s->size += 4;
6610 }
6611 }
6612
6613 /* We've now determined the sizes of the various dynamic sections.
6614 Allocate memory for them. */
6615 relocs = FALSE;
6616 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6617 {
6618 bfd_boolean strip_section = TRUE;
6619
6620 if ((s->flags & SEC_LINKER_CREATED) == 0)
6621 continue;
6622
6623 if (s == htab->elf.splt
6624 || s == htab->elf.sgot)
6625 {
6626 /* We'd like to strip these sections if they aren't needed, but if
6627 we've exported dynamic symbols from them we must leave them.
6628 It's too late to tell BFD to get rid of the symbols. */
6629 if (htab->elf.hplt != NULL)
6630 strip_section = FALSE;
6631 /* Strip this section if we don't need it; see the
6632 comment below. */
6633 }
6634 else if (s == htab->elf.iplt
6635 || s == htab->glink
6636 || s == htab->glink_eh_frame
6637 || s == htab->elf.sgotplt
6638 || s == htab->sbss
6639 || s == htab->elf.sdynbss
6640 || s == htab->elf.sdynrelro
6641 || s == htab->dynsbss)
6642 {
6643 /* Strip these too. */
6644 }
6645 else if (s == htab->sdata[0].section
6646 || s == htab->sdata[1].section)
6647 {
6648 strip_section = (s->flags & SEC_KEEP) == 0;
6649 }
6650 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6651 ".rela"))
6652 {
6653 if (s->size != 0)
6654 {
6655 /* Remember whether there are any relocation sections. */
6656 relocs = TRUE;
6657
6658 /* We use the reloc_count field as a counter if we need
6659 to copy relocs into the output file. */
6660 s->reloc_count = 0;
6661 }
6662 }
6663 else
6664 {
6665 /* It's not one of our sections, so don't allocate space. */
6666 continue;
6667 }
6668
6669 if (s->size == 0 && strip_section)
6670 {
6671 /* If we don't need this section, strip it from the
6672 output file. This is mostly to handle .rela.bss and
6673 .rela.plt. We must create both sections in
6674 create_dynamic_sections, because they must be created
6675 before the linker maps input sections to output
6676 sections. The linker does that before
6677 adjust_dynamic_symbol is called, and it is that
6678 function which decides whether anything needs to go
6679 into these sections. */
6680 s->flags |= SEC_EXCLUDE;
6681 continue;
6682 }
6683
6684 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6685 continue;
6686
6687 /* Allocate memory for the section contents. */
6688 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6689 if (s->contents == NULL)
6690 return FALSE;
6691 }
6692
6693 if (htab->elf.dynamic_sections_created)
6694 {
6695 /* Add some entries to the .dynamic section. We fill in the
6696 values later, in ppc_elf_finish_dynamic_sections, but we
6697 must add the entries now so that we get the correct size for
6698 the .dynamic section. The DT_DEBUG entry is filled in by the
6699 dynamic linker and used by the debugger. */
6700 #define add_dynamic_entry(TAG, VAL) \
6701 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6702
6703 if (bfd_link_executable (info))
6704 {
6705 if (!add_dynamic_entry (DT_DEBUG, 0))
6706 return FALSE;
6707 }
6708
6709 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6710 {
6711 if (!add_dynamic_entry (DT_PLTGOT, 0)
6712 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6713 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6714 || !add_dynamic_entry (DT_JMPREL, 0))
6715 return FALSE;
6716 }
6717
6718 if (htab->plt_type == PLT_NEW
6719 && htab->glink != NULL
6720 && htab->glink->size != 0)
6721 {
6722 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6723 return FALSE;
6724 if (!htab->params->no_tls_get_addr_opt
6725 && htab->tls_get_addr != NULL
6726 && htab->tls_get_addr->plt.plist != NULL
6727 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6728 return FALSE;
6729 }
6730
6731 if (relocs)
6732 {
6733 if (!add_dynamic_entry (DT_RELA, 0)
6734 || !add_dynamic_entry (DT_RELASZ, 0)
6735 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6736 return FALSE;
6737 }
6738
6739 /* If any dynamic relocs apply to a read-only section, then we
6740 need a DT_TEXTREL entry. */
6741 if ((info->flags & DF_TEXTREL) == 0)
6742 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6743 info);
6744
6745 if ((info->flags & DF_TEXTREL) != 0)
6746 {
6747 if (!add_dynamic_entry (DT_TEXTREL, 0))
6748 return FALSE;
6749 }
6750 if (htab->is_vxworks
6751 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6752 return FALSE;
6753 }
6754 #undef add_dynamic_entry
6755
6756 if (htab->glink_eh_frame != NULL
6757 && htab->glink_eh_frame->contents != NULL)
6758 {
6759 unsigned char *p = htab->glink_eh_frame->contents;
6760 bfd_vma val;
6761
6762 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6763 /* CIE length (rewrite in case little-endian). */
6764 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6765 p += sizeof (glink_eh_frame_cie);
6766 /* FDE length. */
6767 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6768 bfd_put_32 (htab->elf.dynobj, val, p);
6769 p += 4;
6770 /* CIE pointer. */
6771 val = p - htab->glink_eh_frame->contents;
6772 bfd_put_32 (htab->elf.dynobj, val, p);
6773 p += 4;
6774 /* Offset to .glink. Set later. */
6775 p += 4;
6776 /* .glink size. */
6777 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6778 p += 4;
6779 /* Augmentation. */
6780 p += 1;
6781
6782 if (bfd_link_pic (info)
6783 && htab->elf.dynamic_sections_created)
6784 {
6785 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6786 if (adv < 64)
6787 *p++ = DW_CFA_advance_loc + adv;
6788 else if (adv < 256)
6789 {
6790 *p++ = DW_CFA_advance_loc1;
6791 *p++ = adv;
6792 }
6793 else if (adv < 65536)
6794 {
6795 *p++ = DW_CFA_advance_loc2;
6796 bfd_put_16 (htab->elf.dynobj, adv, p);
6797 p += 2;
6798 }
6799 else
6800 {
6801 *p++ = DW_CFA_advance_loc4;
6802 bfd_put_32 (htab->elf.dynobj, adv, p);
6803 p += 4;
6804 }
6805 *p++ = DW_CFA_register;
6806 *p++ = 65;
6807 p++;
6808 *p++ = DW_CFA_advance_loc + 4;
6809 *p++ = DW_CFA_restore_extended;
6810 *p++ = 65;
6811 }
6812 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6813 == htab->glink_eh_frame->size);
6814 }
6815
6816 return TRUE;
6817 }
6818
6819 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6820 if it looks like nothing is using them. */
6821
6822 static void
6823 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6824 {
6825 struct elf_link_hash_entry *sda = lsect->sym;
6826
6827 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6828 {
6829 asection *s;
6830
6831 s = bfd_get_section_by_name (output_bfd, lsect->name);
6832 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6833 {
6834 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6835 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6836 {
6837 sda->def_regular = 0;
6838 /* This is somewhat magic. See elf_link_output_extsym. */
6839 sda->ref_dynamic = 1;
6840 sda->forced_local = 0;
6841 }
6842 }
6843 }
6844 }
6845
6846 void
6847 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6848 {
6849 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6850
6851 if (htab != NULL)
6852 {
6853 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6854 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6855 }
6856 }
6857
6858
6859 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6860
6861 static bfd_boolean
6862 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6863 {
6864 if (h->plt.plist != NULL
6865 && !h->def_regular
6866 && (!h->pointer_equality_needed
6867 || !h->ref_regular_nonweak))
6868 return FALSE;
6869
6870 return _bfd_elf_hash_symbol (h);
6871 }
6872 \f
6873 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6874
6875 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6876 used for some functions that are allowed to break the ABI). */
6877 static const int shared_stub_entry[] =
6878 {
6879 0x7c0802a6, /* mflr 0 */
6880 0x429f0005, /* bcl 20, 31, .Lxxx */
6881 0x7d8802a6, /* mflr 12 */
6882 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6883 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6884 0x7c0803a6, /* mtlr 0 */
6885 0x7d8903a6, /* mtctr 12 */
6886 0x4e800420, /* bctr */
6887 };
6888
6889 static const int stub_entry[] =
6890 {
6891 0x3d800000, /* lis 12,xxx@ha */
6892 0x398c0000, /* addi 12,12,xxx@l */
6893 0x7d8903a6, /* mtctr 12 */
6894 0x4e800420, /* bctr */
6895 };
6896
6897 struct ppc_elf_relax_info
6898 {
6899 unsigned int workaround_size;
6900 unsigned int picfixup_size;
6901 };
6902
6903 /* This function implements long branch trampolines, and the ppc476
6904 icache bug workaround. Any section needing trampolines or patch
6905 space for the workaround has its size extended so that we can
6906 add trampolines at the end of the section. */
6907
6908 static bfd_boolean
6909 ppc_elf_relax_section (bfd *abfd,
6910 asection *isec,
6911 struct bfd_link_info *link_info,
6912 bfd_boolean *again)
6913 {
6914 struct one_branch_fixup
6915 {
6916 struct one_branch_fixup *next;
6917 asection *tsec;
6918 /* Final link, can use the symbol offset. For a
6919 relocatable link we use the symbol's index. */
6920 bfd_vma toff;
6921 bfd_vma trampoff;
6922 };
6923
6924 Elf_Internal_Shdr *symtab_hdr;
6925 bfd_byte *contents = NULL;
6926 Elf_Internal_Sym *isymbuf = NULL;
6927 Elf_Internal_Rela *internal_relocs = NULL;
6928 Elf_Internal_Rela *irel, *irelend = NULL;
6929 struct one_branch_fixup *branch_fixups = NULL;
6930 struct ppc_elf_relax_info *relax_info = NULL;
6931 unsigned changes = 0;
6932 bfd_boolean workaround_change;
6933 struct ppc_elf_link_hash_table *htab;
6934 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6935 asection *got2;
6936 bfd_boolean maybe_pasted;
6937
6938 *again = FALSE;
6939
6940 /* No need to do anything with non-alloc or non-code sections. */
6941 if ((isec->flags & SEC_ALLOC) == 0
6942 || (isec->flags & SEC_CODE) == 0
6943 || (isec->flags & SEC_LINKER_CREATED) != 0
6944 || isec->size < 4)
6945 return TRUE;
6946
6947 /* We cannot represent the required PIC relocs in the output, so don't
6948 do anything. The linker doesn't support mixing -shared and -r
6949 anyway. */
6950 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6951 return TRUE;
6952
6953 htab = ppc_elf_hash_table (link_info);
6954 if (htab == NULL)
6955 return TRUE;
6956
6957 isec->size = (isec->size + 3) & -4;
6958 if (isec->rawsize == 0)
6959 isec->rawsize = isec->size;
6960 trampbase = isec->size;
6961
6962 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6963 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6964 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6965
6966 if (htab->params->ppc476_workaround
6967 || htab->params->pic_fixup > 0)
6968 {
6969 if (elf_section_data (isec)->sec_info == NULL)
6970 {
6971 elf_section_data (isec)->sec_info
6972 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6973 if (elf_section_data (isec)->sec_info == NULL)
6974 return FALSE;
6975 }
6976 relax_info = elf_section_data (isec)->sec_info;
6977 trampbase -= relax_info->workaround_size;
6978 }
6979
6980 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6981 || strcmp (isec->output_section->name, ".fini") == 0);
6982 /* Space for a branch around any trampolines. */
6983 trampoff = trampbase;
6984 if (maybe_pasted && trampbase == isec->rawsize)
6985 trampoff += 4;
6986
6987 symtab_hdr = &elf_symtab_hdr (abfd);
6988 picfixup_size = 0;
6989 if (htab->params->branch_trampolines
6990 || htab->params->pic_fixup > 0)
6991 {
6992 /* Get a copy of the native relocations. */
6993 if (isec->reloc_count != 0)
6994 {
6995 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6996 link_info->keep_memory);
6997 if (internal_relocs == NULL)
6998 goto error_return;
6999 }
7000
7001 got2 = bfd_get_section_by_name (abfd, ".got2");
7002
7003 irelend = internal_relocs + isec->reloc_count;
7004 for (irel = internal_relocs; irel < irelend; irel++)
7005 {
7006 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7007 bfd_vma toff, roff;
7008 asection *tsec;
7009 struct one_branch_fixup *f;
7010 size_t insn_offset = 0;
7011 bfd_vma max_branch_offset = 0, val;
7012 bfd_byte *hit_addr;
7013 unsigned long t0;
7014 struct elf_link_hash_entry *h;
7015 struct plt_entry **plist;
7016 unsigned char sym_type;
7017
7018 switch (r_type)
7019 {
7020 case R_PPC_REL24:
7021 case R_PPC_LOCAL24PC:
7022 case R_PPC_PLTREL24:
7023 max_branch_offset = 1 << 25;
7024 break;
7025
7026 case R_PPC_REL14:
7027 case R_PPC_REL14_BRTAKEN:
7028 case R_PPC_REL14_BRNTAKEN:
7029 max_branch_offset = 1 << 15;
7030 break;
7031
7032 case R_PPC_ADDR16_HA:
7033 if (htab->params->pic_fixup > 0)
7034 break;
7035 continue;
7036
7037 default:
7038 continue;
7039 }
7040
7041 /* Get the value of the symbol referred to by the reloc. */
7042 h = NULL;
7043 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7044 {
7045 /* A local symbol. */
7046 Elf_Internal_Sym *isym;
7047
7048 /* Read this BFD's local symbols. */
7049 if (isymbuf == NULL)
7050 {
7051 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7052 if (isymbuf == NULL)
7053 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7054 symtab_hdr->sh_info, 0,
7055 NULL, NULL, NULL);
7056 if (isymbuf == 0)
7057 goto error_return;
7058 }
7059 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7060 if (isym->st_shndx == SHN_UNDEF)
7061 tsec = bfd_und_section_ptr;
7062 else if (isym->st_shndx == SHN_ABS)
7063 tsec = bfd_abs_section_ptr;
7064 else if (isym->st_shndx == SHN_COMMON)
7065 tsec = bfd_com_section_ptr;
7066 else
7067 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7068
7069 toff = isym->st_value;
7070 sym_type = ELF_ST_TYPE (isym->st_info);
7071 }
7072 else
7073 {
7074 /* Global symbol handling. */
7075 unsigned long indx;
7076
7077 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7078 h = elf_sym_hashes (abfd)[indx];
7079
7080 while (h->root.type == bfd_link_hash_indirect
7081 || h->root.type == bfd_link_hash_warning)
7082 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7083
7084 if (h->root.type == bfd_link_hash_defined
7085 || h->root.type == bfd_link_hash_defweak)
7086 {
7087 tsec = h->root.u.def.section;
7088 toff = h->root.u.def.value;
7089 }
7090 else if (h->root.type == bfd_link_hash_undefined
7091 || h->root.type == bfd_link_hash_undefweak)
7092 {
7093 tsec = bfd_und_section_ptr;
7094 toff = bfd_link_relocatable (link_info) ? indx : 0;
7095 }
7096 else
7097 continue;
7098
7099 /* If this branch is to __tls_get_addr then we may later
7100 optimise away the call. We won't be needing a long-
7101 branch stub in that case. */
7102 if (bfd_link_executable (link_info)
7103 && h == htab->tls_get_addr
7104 && irel != internal_relocs)
7105 {
7106 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7107 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7108 unsigned int tls_mask = 0;
7109
7110 /* The previous reloc should be one of R_PPC_TLSGD or
7111 R_PPC_TLSLD, or for older object files, a reloc
7112 on the __tls_get_addr arg setup insn. Get tls
7113 mask bits from the symbol on that reloc. */
7114 if (t_symndx < symtab_hdr->sh_info)
7115 {
7116 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7117
7118 if (local_got_offsets != NULL)
7119 {
7120 struct plt_entry **local_plt = (struct plt_entry **)
7121 (local_got_offsets + symtab_hdr->sh_info);
7122 char *lgot_masks = (char *)
7123 (local_plt + symtab_hdr->sh_info);
7124 tls_mask = lgot_masks[t_symndx];
7125 }
7126 }
7127 else
7128 {
7129 struct elf_link_hash_entry *th
7130 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7131
7132 while (th->root.type == bfd_link_hash_indirect
7133 || th->root.type == bfd_link_hash_warning)
7134 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7135
7136 tls_mask
7137 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7138 }
7139
7140 /* The mask bits tell us if the call will be
7141 optimised away. */
7142 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7143 && (t_rtype == R_PPC_TLSGD
7144 || t_rtype == R_PPC_GOT_TLSGD16
7145 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7146 continue;
7147 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7148 && (t_rtype == R_PPC_TLSLD
7149 || t_rtype == R_PPC_GOT_TLSLD16
7150 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7151 continue;
7152 }
7153
7154 sym_type = h->type;
7155 }
7156
7157 if (r_type == R_PPC_ADDR16_HA)
7158 {
7159 if (h != NULL
7160 && !h->def_regular
7161 && h->protected_def
7162 && ppc_elf_hash_entry (h)->has_addr16_ha
7163 && ppc_elf_hash_entry (h)->has_addr16_lo)
7164 picfixup_size += 12;
7165 continue;
7166 }
7167
7168 /* The condition here under which we call find_plt_ent must
7169 match that in relocate_section. If we call find_plt_ent here
7170 but not in relocate_section, or vice versa, then the branch
7171 destination used here may be incorrect. */
7172 plist = NULL;
7173 if (h != NULL)
7174 {
7175 /* We know is_branch_reloc (r_type) is true. */
7176 if (h->type == STT_GNU_IFUNC
7177 || r_type == R_PPC_PLTREL24)
7178 plist = &h->plt.plist;
7179 }
7180 else if (sym_type == STT_GNU_IFUNC
7181 && elf_local_got_offsets (abfd) != NULL)
7182 {
7183 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7184 struct plt_entry **local_plt = (struct plt_entry **)
7185 (local_got_offsets + symtab_hdr->sh_info);
7186 plist = local_plt + ELF32_R_SYM (irel->r_info);
7187 }
7188 if (plist != NULL)
7189 {
7190 bfd_vma addend = 0;
7191 struct plt_entry *ent;
7192
7193 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7194 addend = irel->r_addend;
7195 ent = find_plt_ent (plist, got2, addend);
7196 if (ent != NULL)
7197 {
7198 if (htab->plt_type == PLT_NEW
7199 || h == NULL
7200 || !htab->elf.dynamic_sections_created
7201 || h->dynindx == -1)
7202 {
7203 tsec = htab->glink;
7204 toff = ent->glink_offset;
7205 }
7206 else
7207 {
7208 tsec = htab->elf.splt;
7209 toff = ent->plt.offset;
7210 }
7211 }
7212 }
7213
7214 /* If the branch and target are in the same section, you have
7215 no hope of adding stubs. We'll error out later should the
7216 branch overflow. */
7217 if (tsec == isec)
7218 continue;
7219
7220 /* There probably isn't any reason to handle symbols in
7221 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7222 attribute for a code section, and we are only looking at
7223 branches. However, implement it correctly here as a
7224 reference for other target relax_section functions. */
7225 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7226 {
7227 /* At this stage in linking, no SEC_MERGE symbol has been
7228 adjusted, so all references to such symbols need to be
7229 passed through _bfd_merged_section_offset. (Later, in
7230 relocate_section, all SEC_MERGE symbols *except* for
7231 section symbols have been adjusted.)
7232
7233 gas may reduce relocations against symbols in SEC_MERGE
7234 sections to a relocation against the section symbol when
7235 the original addend was zero. When the reloc is against
7236 a section symbol we should include the addend in the
7237 offset passed to _bfd_merged_section_offset, since the
7238 location of interest is the original symbol. On the
7239 other hand, an access to "sym+addend" where "sym" is not
7240 a section symbol should not include the addend; Such an
7241 access is presumed to be an offset from "sym"; The
7242 location of interest is just "sym". */
7243 if (sym_type == STT_SECTION)
7244 toff += irel->r_addend;
7245
7246 toff
7247 = _bfd_merged_section_offset (abfd, &tsec,
7248 elf_section_data (tsec)->sec_info,
7249 toff);
7250
7251 if (sym_type != STT_SECTION)
7252 toff += irel->r_addend;
7253 }
7254 /* PLTREL24 addends are special. */
7255 else if (r_type != R_PPC_PLTREL24)
7256 toff += irel->r_addend;
7257
7258 /* Attempted -shared link of non-pic code loses. */
7259 if ((!bfd_link_relocatable (link_info)
7260 && tsec == bfd_und_section_ptr)
7261 || tsec->output_section == NULL
7262 || (tsec->owner != NULL
7263 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7264 continue;
7265
7266 roff = irel->r_offset;
7267
7268 /* If the branch is in range, no need to do anything. */
7269 if (tsec != bfd_und_section_ptr
7270 && (!bfd_link_relocatable (link_info)
7271 /* A relocatable link may have sections moved during
7272 final link, so do not presume they remain in range. */
7273 || tsec->output_section == isec->output_section))
7274 {
7275 bfd_vma symaddr, reladdr;
7276
7277 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7278 reladdr = isec->output_section->vma + isec->output_offset + roff;
7279 if (symaddr - reladdr + max_branch_offset
7280 < 2 * max_branch_offset)
7281 continue;
7282 }
7283
7284 /* Look for an existing fixup to this address. */
7285 for (f = branch_fixups; f ; f = f->next)
7286 if (f->tsec == tsec && f->toff == toff)
7287 break;
7288
7289 if (f == NULL)
7290 {
7291 size_t size;
7292 unsigned long stub_rtype;
7293
7294 val = trampoff - roff;
7295 if (val >= max_branch_offset)
7296 /* Oh dear, we can't reach a trampoline. Don't try to add
7297 one. We'll report an error later. */
7298 continue;
7299
7300 if (bfd_link_pic (link_info))
7301 {
7302 size = 4 * ARRAY_SIZE (shared_stub_entry);
7303 insn_offset = 12;
7304 }
7305 else
7306 {
7307 size = 4 * ARRAY_SIZE (stub_entry);
7308 insn_offset = 0;
7309 }
7310 stub_rtype = R_PPC_RELAX;
7311 if (tsec == htab->elf.splt
7312 || tsec == htab->glink)
7313 {
7314 stub_rtype = R_PPC_RELAX_PLT;
7315 if (r_type == R_PPC_PLTREL24)
7316 stub_rtype = R_PPC_RELAX_PLTREL24;
7317 }
7318
7319 /* Hijack the old relocation. Since we need two
7320 relocations for this use a "composite" reloc. */
7321 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7322 stub_rtype);
7323 irel->r_offset = trampoff + insn_offset;
7324 if (r_type == R_PPC_PLTREL24
7325 && stub_rtype != R_PPC_RELAX_PLTREL24)
7326 irel->r_addend = 0;
7327
7328 /* Record the fixup so we don't do it again this section. */
7329 f = bfd_malloc (sizeof (*f));
7330 f->next = branch_fixups;
7331 f->tsec = tsec;
7332 f->toff = toff;
7333 f->trampoff = trampoff;
7334 branch_fixups = f;
7335
7336 trampoff += size;
7337 changes++;
7338 }
7339 else
7340 {
7341 val = f->trampoff - roff;
7342 if (val >= max_branch_offset)
7343 continue;
7344
7345 /* Nop out the reloc, since we're finalizing things here. */
7346 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7347 }
7348
7349 /* Get the section contents. */
7350 if (contents == NULL)
7351 {
7352 /* Get cached copy if it exists. */
7353 if (elf_section_data (isec)->this_hdr.contents != NULL)
7354 contents = elf_section_data (isec)->this_hdr.contents;
7355 /* Go get them off disk. */
7356 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7357 goto error_return;
7358 }
7359
7360 /* Fix up the existing branch to hit the trampoline. */
7361 hit_addr = contents + roff;
7362 switch (r_type)
7363 {
7364 case R_PPC_REL24:
7365 case R_PPC_LOCAL24PC:
7366 case R_PPC_PLTREL24:
7367 t0 = bfd_get_32 (abfd, hit_addr);
7368 t0 &= ~0x3fffffc;
7369 t0 |= val & 0x3fffffc;
7370 bfd_put_32 (abfd, t0, hit_addr);
7371 break;
7372
7373 case R_PPC_REL14:
7374 case R_PPC_REL14_BRTAKEN:
7375 case R_PPC_REL14_BRNTAKEN:
7376 t0 = bfd_get_32 (abfd, hit_addr);
7377 t0 &= ~0xfffc;
7378 t0 |= val & 0xfffc;
7379 bfd_put_32 (abfd, t0, hit_addr);
7380 break;
7381 }
7382 }
7383
7384 while (branch_fixups != NULL)
7385 {
7386 struct one_branch_fixup *f = branch_fixups;
7387 branch_fixups = branch_fixups->next;
7388 free (f);
7389 }
7390 }
7391
7392 workaround_change = FALSE;
7393 newsize = trampoff;
7394 if (htab->params->ppc476_workaround
7395 && (!bfd_link_relocatable (link_info)
7396 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7397 {
7398 bfd_vma addr, end_addr;
7399 unsigned int crossings;
7400 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7401
7402 addr = isec->output_section->vma + isec->output_offset;
7403 end_addr = addr + trampoff;
7404 addr &= -pagesize;
7405 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7406 if (crossings != 0)
7407 {
7408 /* Keep space aligned, to ensure the patch code itself does
7409 not cross a page. Don't decrease size calculated on a
7410 previous pass as otherwise we might never settle on a layout. */
7411 newsize = 15 - ((end_addr - 1) & 15);
7412 newsize += crossings * 16;
7413 if (relax_info->workaround_size < newsize)
7414 {
7415 relax_info->workaround_size = newsize;
7416 workaround_change = TRUE;
7417 }
7418 /* Ensure relocate_section is called. */
7419 isec->flags |= SEC_RELOC;
7420 }
7421 newsize = trampoff + relax_info->workaround_size;
7422 }
7423
7424 if (htab->params->pic_fixup > 0)
7425 {
7426 picfixup_size -= relax_info->picfixup_size;
7427 if (picfixup_size != 0)
7428 relax_info->picfixup_size += picfixup_size;
7429 newsize += relax_info->picfixup_size;
7430 }
7431
7432 if (changes != 0 || picfixup_size != 0 || workaround_change)
7433 isec->size = newsize;
7434
7435 if (isymbuf != NULL
7436 && symtab_hdr->contents != (unsigned char *) isymbuf)
7437 {
7438 if (! link_info->keep_memory)
7439 free (isymbuf);
7440 else
7441 {
7442 /* Cache the symbols for elf_link_input_bfd. */
7443 symtab_hdr->contents = (unsigned char *) isymbuf;
7444 }
7445 }
7446
7447 if (contents != NULL
7448 && elf_section_data (isec)->this_hdr.contents != contents)
7449 {
7450 if (!changes && !link_info->keep_memory)
7451 free (contents);
7452 else
7453 {
7454 /* Cache the section contents for elf_link_input_bfd. */
7455 elf_section_data (isec)->this_hdr.contents = contents;
7456 }
7457 }
7458
7459 changes += picfixup_size;
7460 if (changes != 0)
7461 {
7462 /* Append sufficient NOP relocs so we can write out relocation
7463 information for the trampolines. */
7464 Elf_Internal_Shdr *rel_hdr;
7465 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7466 * sizeof (*new_relocs));
7467 unsigned ix;
7468
7469 if (!new_relocs)
7470 goto error_return;
7471 memcpy (new_relocs, internal_relocs,
7472 isec->reloc_count * sizeof (*new_relocs));
7473 for (ix = changes; ix--;)
7474 {
7475 irel = new_relocs + ix + isec->reloc_count;
7476
7477 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7478 }
7479 if (internal_relocs != elf_section_data (isec)->relocs)
7480 free (internal_relocs);
7481 elf_section_data (isec)->relocs = new_relocs;
7482 isec->reloc_count += changes;
7483 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7484 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7485 }
7486 else if (internal_relocs != NULL
7487 && elf_section_data (isec)->relocs != internal_relocs)
7488 free (internal_relocs);
7489
7490 *again = changes != 0 || workaround_change;
7491 return TRUE;
7492
7493 error_return:
7494 while (branch_fixups != NULL)
7495 {
7496 struct one_branch_fixup *f = branch_fixups;
7497 branch_fixups = branch_fixups->next;
7498 free (f);
7499 }
7500 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7501 free (isymbuf);
7502 if (contents != NULL
7503 && elf_section_data (isec)->this_hdr.contents != contents)
7504 free (contents);
7505 if (internal_relocs != NULL
7506 && elf_section_data (isec)->relocs != internal_relocs)
7507 free (internal_relocs);
7508 return FALSE;
7509 }
7510 \f
7511 /* What to do when ld finds relocations against symbols defined in
7512 discarded sections. */
7513
7514 static unsigned int
7515 ppc_elf_action_discarded (asection *sec)
7516 {
7517 if (strcmp (".fixup", sec->name) == 0)
7518 return 0;
7519
7520 if (strcmp (".got2", sec->name) == 0)
7521 return 0;
7522
7523 return _bfd_elf_default_action_discarded (sec);
7524 }
7525 \f
7526 /* Fill in the address for a pointer generated in a linker section. */
7527
7528 static bfd_vma
7529 elf_finish_pointer_linker_section (bfd *input_bfd,
7530 elf_linker_section_t *lsect,
7531 struct elf_link_hash_entry *h,
7532 bfd_vma relocation,
7533 const Elf_Internal_Rela *rel)
7534 {
7535 elf_linker_section_pointers_t *linker_section_ptr;
7536
7537 BFD_ASSERT (lsect != NULL);
7538
7539 if (h != NULL)
7540 {
7541 /* Handle global symbol. */
7542 struct ppc_elf_link_hash_entry *eh;
7543
7544 eh = (struct ppc_elf_link_hash_entry *) h;
7545 BFD_ASSERT (eh->elf.def_regular);
7546 linker_section_ptr = eh->linker_section_pointer;
7547 }
7548 else
7549 {
7550 /* Handle local symbol. */
7551 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7552
7553 BFD_ASSERT (is_ppc_elf (input_bfd));
7554 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7555 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7556 }
7557
7558 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7559 rel->r_addend,
7560 lsect);
7561 BFD_ASSERT (linker_section_ptr != NULL);
7562
7563 /* Offset will always be a multiple of four, so use the bottom bit
7564 as a "written" flag. */
7565 if ((linker_section_ptr->offset & 1) == 0)
7566 {
7567 bfd_put_32 (lsect->section->owner,
7568 relocation + linker_section_ptr->addend,
7569 lsect->section->contents + linker_section_ptr->offset);
7570 linker_section_ptr->offset += 1;
7571 }
7572
7573 relocation = (lsect->section->output_section->vma
7574 + lsect->section->output_offset
7575 + linker_section_ptr->offset - 1
7576 - SYM_VAL (lsect->sym));
7577
7578 #ifdef DEBUG
7579 fprintf (stderr,
7580 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7581 lsect->name, (long) relocation, (long) relocation);
7582 #endif
7583
7584 return relocation;
7585 }
7586
7587 #define PPC_LO(v) ((v) & 0xffff)
7588 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7589 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7590
7591 static void
7592 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7593 struct bfd_link_info *info)
7594 {
7595 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7596 bfd *output_bfd = info->output_bfd;
7597 bfd_vma plt;
7598
7599 plt = ((ent->plt.offset & ~1)
7600 + plt_sec->output_section->vma
7601 + plt_sec->output_offset);
7602
7603 if (bfd_link_pic (info))
7604 {
7605 bfd_vma got = 0;
7606
7607 if (ent->addend >= 32768)
7608 got = (ent->addend
7609 + ent->sec->output_section->vma
7610 + ent->sec->output_offset);
7611 else if (htab->elf.hgot != NULL)
7612 got = SYM_VAL (htab->elf.hgot);
7613
7614 plt -= got;
7615
7616 if (plt + 0x8000 < 0x10000)
7617 {
7618 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7619 p += 4;
7620 bfd_put_32 (output_bfd, MTCTR_11, p);
7621 p += 4;
7622 bfd_put_32 (output_bfd, BCTR, p);
7623 p += 4;
7624 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7625 p += 4;
7626 }
7627 else
7628 {
7629 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7630 p += 4;
7631 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7632 p += 4;
7633 bfd_put_32 (output_bfd, MTCTR_11, p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, BCTR, p);
7636 p += 4;
7637 }
7638 }
7639 else
7640 {
7641 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7642 p += 4;
7643 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7644 p += 4;
7645 bfd_put_32 (output_bfd, MTCTR_11, p);
7646 p += 4;
7647 bfd_put_32 (output_bfd, BCTR, p);
7648 p += 4;
7649 }
7650 }
7651
7652 /* Return true if symbol is defined statically. */
7653
7654 static bfd_boolean
7655 is_static_defined (struct elf_link_hash_entry *h)
7656 {
7657 return ((h->root.type == bfd_link_hash_defined
7658 || h->root.type == bfd_link_hash_defweak)
7659 && h->root.u.def.section != NULL
7660 && h->root.u.def.section->output_section != NULL);
7661 }
7662
7663 /* If INSN is an opcode that may be used with an @tls operand, return
7664 the transformed insn for TLS optimisation, otherwise return 0. If
7665 REG is non-zero only match an insn with RB or RA equal to REG. */
7666
7667 unsigned int
7668 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7669 {
7670 unsigned int rtra;
7671
7672 if ((insn & (0x3f << 26)) != 31 << 26)
7673 return 0;
7674
7675 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7676 rtra = insn & ((1 << 26) - (1 << 16));
7677 else if (((insn >> 16) & 0x1f) == reg)
7678 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7679 else
7680 return 0;
7681
7682 if ((insn & (0x3ff << 1)) == 266 << 1)
7683 /* add -> addi. */
7684 insn = 14 << 26;
7685 else if ((insn & (0x1f << 1)) == 23 << 1
7686 && ((insn & (0x1f << 6)) < 14 << 6
7687 || ((insn & (0x1f << 6)) >= 16 << 6
7688 && (insn & (0x1f << 6)) < 24 << 6)))
7689 /* load and store indexed -> dform. */
7690 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7691 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7692 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7693 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7694 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7695 /* lwax -> lwa. */
7696 insn = (58 << 26) | 2;
7697 else
7698 return 0;
7699 insn |= rtra;
7700 return insn;
7701 }
7702
7703 /* If INSN is an opcode that may be used with an @tprel operand, return
7704 the transformed insn for an undefined weak symbol, ie. with the
7705 thread pointer REG operand removed. Otherwise return 0. */
7706
7707 unsigned int
7708 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7709 {
7710 if ((insn & (0x1f << 16)) == reg << 16
7711 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7712 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7713 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7714 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7715 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7716 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7717 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7718 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7719 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7720 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7721 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7722 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7723 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7724 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7725 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7726 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7727 && (insn & 3) != 1)
7728 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7729 && ((insn & 3) == 0 || (insn & 3) == 3))))
7730 {
7731 insn &= ~(0x1f << 16);
7732 }
7733 else if ((insn & (0x1f << 21)) == reg << 21
7734 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7735 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7736 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7737 {
7738 insn &= ~(0x1f << 21);
7739 insn |= (insn & (0x1f << 16)) << 5;
7740 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7741 insn -= 2 >> 26; /* convert to ori,oris */
7742 }
7743 else
7744 insn = 0;
7745 return insn;
7746 }
7747
7748 static bfd_boolean
7749 is_insn_ds_form (unsigned int insn)
7750 {
7751 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7752 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7753 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7754 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7755 }
7756
7757 static bfd_boolean
7758 is_insn_dq_form (unsigned int insn)
7759 {
7760 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7761 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7762 && (insn & 3) == 1));
7763 }
7764
7765 /* The RELOCATE_SECTION function is called by the ELF backend linker
7766 to handle the relocations for a section.
7767
7768 The relocs are always passed as Rela structures; if the section
7769 actually uses Rel structures, the r_addend field will always be
7770 zero.
7771
7772 This function is responsible for adjust the section contents as
7773 necessary, and (if using Rela relocs and generating a
7774 relocatable output file) adjusting the reloc addend as
7775 necessary.
7776
7777 This function does not have to worry about setting the reloc
7778 address or the reloc symbol index.
7779
7780 LOCAL_SYMS is a pointer to the swapped in local symbols.
7781
7782 LOCAL_SECTIONS is an array giving the section in the input file
7783 corresponding to the st_shndx field of each local symbol.
7784
7785 The global hash table entry for the global symbols can be found
7786 via elf_sym_hashes (input_bfd).
7787
7788 When generating relocatable output, this function must handle
7789 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7790 going to be the section symbol corresponding to the output
7791 section, which means that the addend must be adjusted
7792 accordingly. */
7793
7794 static bfd_boolean
7795 ppc_elf_relocate_section (bfd *output_bfd,
7796 struct bfd_link_info *info,
7797 bfd *input_bfd,
7798 asection *input_section,
7799 bfd_byte *contents,
7800 Elf_Internal_Rela *relocs,
7801 Elf_Internal_Sym *local_syms,
7802 asection **local_sections)
7803 {
7804 Elf_Internal_Shdr *symtab_hdr;
7805 struct elf_link_hash_entry **sym_hashes;
7806 struct ppc_elf_link_hash_table *htab;
7807 Elf_Internal_Rela *rel;
7808 Elf_Internal_Rela *wrel;
7809 Elf_Internal_Rela *relend;
7810 Elf_Internal_Rela outrel;
7811 asection *got2;
7812 bfd_vma *local_got_offsets;
7813 bfd_boolean ret = TRUE;
7814 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7815 bfd_boolean is_vxworks_tls;
7816 unsigned int picfixup_size = 0;
7817 struct ppc_elf_relax_info *relax_info = NULL;
7818
7819 #ifdef DEBUG
7820 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7821 "%ld relocations%s",
7822 input_bfd, input_section,
7823 (long) input_section->reloc_count,
7824 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7825 #endif
7826
7827 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7828
7829 /* Initialize howto table if not already done. */
7830 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7831 ppc_elf_howto_init ();
7832
7833 htab = ppc_elf_hash_table (info);
7834 local_got_offsets = elf_local_got_offsets (input_bfd);
7835 symtab_hdr = &elf_symtab_hdr (input_bfd);
7836 sym_hashes = elf_sym_hashes (input_bfd);
7837 /* We have to handle relocations in vxworks .tls_vars sections
7838 specially, because the dynamic loader is 'weird'. */
7839 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7840 && !strcmp (input_section->output_section->name,
7841 ".tls_vars"));
7842 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7843 relax_info = elf_section_data (input_section)->sec_info;
7844 rel = wrel = relocs;
7845 relend = relocs + input_section->reloc_count;
7846 for (; rel < relend; wrel++, rel++)
7847 {
7848 enum elf_ppc_reloc_type r_type;
7849 bfd_vma addend;
7850 bfd_reloc_status_type r;
7851 Elf_Internal_Sym *sym;
7852 asection *sec;
7853 struct elf_link_hash_entry *h;
7854 const char *sym_name;
7855 reloc_howto_type *howto;
7856 unsigned long r_symndx;
7857 bfd_vma relocation;
7858 bfd_vma branch_bit, from;
7859 bfd_boolean unresolved_reloc;
7860 bfd_boolean warned;
7861 unsigned int tls_type, tls_mask, tls_gd;
7862 struct plt_entry **ifunc;
7863 struct reloc_howto_struct alt_howto;
7864
7865 again:
7866 r_type = ELF32_R_TYPE (rel->r_info);
7867 sym = NULL;
7868 sec = NULL;
7869 h = NULL;
7870 unresolved_reloc = FALSE;
7871 warned = FALSE;
7872 r_symndx = ELF32_R_SYM (rel->r_info);
7873
7874 if (r_symndx < symtab_hdr->sh_info)
7875 {
7876 sym = local_syms + r_symndx;
7877 sec = local_sections[r_symndx];
7878 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7879
7880 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7881 }
7882 else
7883 {
7884 bfd_boolean ignored;
7885
7886 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7887 r_symndx, symtab_hdr, sym_hashes,
7888 h, sec, relocation,
7889 unresolved_reloc, warned, ignored);
7890
7891 sym_name = h->root.root.string;
7892 }
7893
7894 if (sec != NULL && discarded_section (sec))
7895 {
7896 /* For relocs against symbols from removed linkonce sections,
7897 or sections discarded by a linker script, we just want the
7898 section contents zeroed. Avoid any special processing. */
7899 howto = NULL;
7900 if (r_type < R_PPC_max)
7901 howto = ppc_elf_howto_table[r_type];
7902
7903 _bfd_clear_contents (howto, input_bfd, input_section,
7904 contents + rel->r_offset);
7905 wrel->r_offset = rel->r_offset;
7906 wrel->r_info = 0;
7907 wrel->r_addend = 0;
7908
7909 /* For ld -r, remove relocations in debug sections against
7910 sections defined in discarded sections. Not done for
7911 non-debug to preserve relocs in .eh_frame which the
7912 eh_frame editing code expects to be present. */
7913 if (bfd_link_relocatable (info)
7914 && (input_section->flags & SEC_DEBUGGING))
7915 wrel--;
7916
7917 continue;
7918 }
7919
7920 if (bfd_link_relocatable (info))
7921 {
7922 if (got2 != NULL
7923 && r_type == R_PPC_PLTREL24
7924 && rel->r_addend != 0)
7925 {
7926 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7927 addend specifies the GOT pointer offset within .got2. */
7928 rel->r_addend += got2->output_offset;
7929 }
7930 if (r_type != R_PPC_RELAX_PLT
7931 && r_type != R_PPC_RELAX_PLTREL24
7932 && r_type != R_PPC_RELAX)
7933 goto copy_reloc;
7934 }
7935
7936 /* TLS optimizations. Replace instruction sequences and relocs
7937 based on information we collected in tls_optimize. We edit
7938 RELOCS so that --emit-relocs will output something sensible
7939 for the final instruction stream. */
7940 tls_mask = 0;
7941 tls_gd = 0;
7942 if (h != NULL)
7943 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7944 else if (local_got_offsets != NULL)
7945 {
7946 struct plt_entry **local_plt;
7947 char *lgot_masks;
7948 local_plt
7949 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7950 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7951 tls_mask = lgot_masks[r_symndx];
7952 }
7953
7954 /* Ensure reloc mapping code below stays sane. */
7955 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7956 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7957 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7958 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7959 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7960 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7961 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7962 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7963 abort ();
7964 switch (r_type)
7965 {
7966 default:
7967 break;
7968
7969 case R_PPC_GOT_TPREL16:
7970 case R_PPC_GOT_TPREL16_LO:
7971 if ((tls_mask & TLS_TLS) != 0
7972 && (tls_mask & TLS_TPREL) == 0)
7973 {
7974 bfd_vma insn;
7975
7976 insn = bfd_get_32 (input_bfd,
7977 contents + rel->r_offset - d_offset);
7978 insn &= 31 << 21;
7979 insn |= 0x3c020000; /* addis 0,2,0 */
7980 bfd_put_32 (input_bfd, insn,
7981 contents + rel->r_offset - d_offset);
7982 r_type = R_PPC_TPREL16_HA;
7983 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7984 }
7985 break;
7986
7987 case R_PPC_TLS:
7988 if ((tls_mask & TLS_TLS) != 0
7989 && (tls_mask & TLS_TPREL) == 0)
7990 {
7991 bfd_vma insn;
7992
7993 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7994 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7995 if (insn == 0)
7996 abort ();
7997 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7998 r_type = R_PPC_TPREL16_LO;
7999 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8000
8001 /* Was PPC_TLS which sits on insn boundary, now
8002 PPC_TPREL16_LO which is at low-order half-word. */
8003 rel->r_offset += d_offset;
8004 }
8005 break;
8006
8007 case R_PPC_GOT_TLSGD16_HI:
8008 case R_PPC_GOT_TLSGD16_HA:
8009 tls_gd = TLS_TPRELGD;
8010 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8011 goto tls_gdld_hi;
8012 break;
8013
8014 case R_PPC_GOT_TLSLD16_HI:
8015 case R_PPC_GOT_TLSLD16_HA:
8016 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8017 {
8018 tls_gdld_hi:
8019 if ((tls_mask & tls_gd) != 0)
8020 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8021 + R_PPC_GOT_TPREL16);
8022 else
8023 {
8024 rel->r_offset -= d_offset;
8025 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8026 r_type = R_PPC_NONE;
8027 }
8028 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8029 }
8030 break;
8031
8032 case R_PPC_GOT_TLSGD16:
8033 case R_PPC_GOT_TLSGD16_LO:
8034 tls_gd = TLS_TPRELGD;
8035 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8036 goto tls_ldgd_opt;
8037 break;
8038
8039 case R_PPC_GOT_TLSLD16:
8040 case R_PPC_GOT_TLSLD16_LO:
8041 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8042 {
8043 unsigned int insn1, insn2;
8044 bfd_vma offset;
8045
8046 tls_ldgd_opt:
8047 offset = (bfd_vma) -1;
8048 /* If not using the newer R_PPC_TLSGD/LD to mark
8049 __tls_get_addr calls, we must trust that the call
8050 stays with its arg setup insns, ie. that the next
8051 reloc is the __tls_get_addr call associated with
8052 the current reloc. Edit both insns. */
8053 if (input_section->has_tls_get_addr_call
8054 && rel + 1 < relend
8055 && branch_reloc_hash_match (input_bfd, rel + 1,
8056 htab->tls_get_addr))
8057 offset = rel[1].r_offset;
8058 /* We read the low GOT_TLS insn because we need to keep
8059 the destination reg. It may be something other than
8060 the usual r3, and moved to r3 before the call by
8061 intervening code. */
8062 insn1 = bfd_get_32 (input_bfd,
8063 contents + rel->r_offset - d_offset);
8064 if ((tls_mask & tls_gd) != 0)
8065 {
8066 /* IE */
8067 insn1 &= (0x1f << 21) | (0x1f << 16);
8068 insn1 |= 32 << 26; /* lwz */
8069 if (offset != (bfd_vma) -1)
8070 {
8071 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8072 insn2 = 0x7c631214; /* add 3,3,2 */
8073 bfd_put_32 (input_bfd, insn2, contents + offset);
8074 }
8075 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8076 + R_PPC_GOT_TPREL16);
8077 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8078 }
8079 else
8080 {
8081 /* LE */
8082 insn1 &= 0x1f << 21;
8083 insn1 |= 0x3c020000; /* addis r,2,0 */
8084 if (tls_gd == 0)
8085 {
8086 /* Was an LD reloc. */
8087 for (r_symndx = 0;
8088 r_symndx < symtab_hdr->sh_info;
8089 r_symndx++)
8090 if (local_sections[r_symndx] == sec)
8091 break;
8092 if (r_symndx >= symtab_hdr->sh_info)
8093 r_symndx = STN_UNDEF;
8094 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8095 if (r_symndx != STN_UNDEF)
8096 rel->r_addend -= (local_syms[r_symndx].st_value
8097 + sec->output_offset
8098 + sec->output_section->vma);
8099 }
8100 r_type = R_PPC_TPREL16_HA;
8101 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8102 if (offset != (bfd_vma) -1)
8103 {
8104 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8105 rel[1].r_offset = offset + d_offset;
8106 rel[1].r_addend = rel->r_addend;
8107 insn2 = 0x38630000; /* addi 3,3,0 */
8108 bfd_put_32 (input_bfd, insn2, contents + offset);
8109 }
8110 }
8111 bfd_put_32 (input_bfd, insn1,
8112 contents + rel->r_offset - d_offset);
8113 if (tls_gd == 0)
8114 {
8115 /* We changed the symbol on an LD reloc. Start over
8116 in order to get h, sym, sec etc. right. */
8117 goto again;
8118 }
8119 }
8120 break;
8121
8122 case R_PPC_TLSGD:
8123 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8124 {
8125 unsigned int insn2;
8126 bfd_vma offset = rel->r_offset;
8127
8128 if ((tls_mask & TLS_TPRELGD) != 0)
8129 {
8130 /* IE */
8131 r_type = R_PPC_NONE;
8132 insn2 = 0x7c631214; /* add 3,3,2 */
8133 }
8134 else
8135 {
8136 /* LE */
8137 r_type = R_PPC_TPREL16_LO;
8138 rel->r_offset += d_offset;
8139 insn2 = 0x38630000; /* addi 3,3,0 */
8140 }
8141 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8142 bfd_put_32 (input_bfd, insn2, contents + offset);
8143 /* Zap the reloc on the _tls_get_addr call too. */
8144 BFD_ASSERT (offset == rel[1].r_offset);
8145 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8146 }
8147 break;
8148
8149 case R_PPC_TLSLD:
8150 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8151 {
8152 unsigned int insn2;
8153
8154 for (r_symndx = 0;
8155 r_symndx < symtab_hdr->sh_info;
8156 r_symndx++)
8157 if (local_sections[r_symndx] == sec)
8158 break;
8159 if (r_symndx >= symtab_hdr->sh_info)
8160 r_symndx = STN_UNDEF;
8161 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8162 if (r_symndx != STN_UNDEF)
8163 rel->r_addend -= (local_syms[r_symndx].st_value
8164 + sec->output_offset
8165 + sec->output_section->vma);
8166
8167 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8168 rel->r_offset += d_offset;
8169 insn2 = 0x38630000; /* addi 3,3,0 */
8170 bfd_put_32 (input_bfd, insn2,
8171 contents + rel->r_offset - d_offset);
8172 /* Zap the reloc on the _tls_get_addr call too. */
8173 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8174 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8175 goto again;
8176 }
8177 break;
8178 }
8179
8180 /* Handle other relocations that tweak non-addend part of insn. */
8181 branch_bit = 0;
8182 switch (r_type)
8183 {
8184 default:
8185 break;
8186
8187 /* Branch taken prediction relocations. */
8188 case R_PPC_ADDR14_BRTAKEN:
8189 case R_PPC_REL14_BRTAKEN:
8190 branch_bit = BRANCH_PREDICT_BIT;
8191 /* Fall through. */
8192
8193 /* Branch not taken prediction relocations. */
8194 case R_PPC_ADDR14_BRNTAKEN:
8195 case R_PPC_REL14_BRNTAKEN:
8196 {
8197 bfd_vma insn;
8198
8199 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8200 insn &= ~BRANCH_PREDICT_BIT;
8201 insn |= branch_bit;
8202
8203 from = (rel->r_offset
8204 + input_section->output_offset
8205 + input_section->output_section->vma);
8206
8207 /* Invert 'y' bit if not the default. */
8208 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8209 insn ^= BRANCH_PREDICT_BIT;
8210
8211 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8212 break;
8213 }
8214 }
8215
8216 if (ELIMINATE_COPY_RELOCS
8217 && h != NULL
8218 && !h->def_regular
8219 && h->protected_def
8220 && ppc_elf_hash_entry (h)->has_addr16_ha
8221 && ppc_elf_hash_entry (h)->has_addr16_lo
8222 && htab->params->pic_fixup > 0)
8223 {
8224 /* Convert lis;addi or lis;load/store accessing a protected
8225 variable defined in a shared library to PIC. */
8226 unsigned int insn;
8227
8228 if (r_type == R_PPC_ADDR16_HA)
8229 {
8230 insn = bfd_get_32 (input_bfd,
8231 contents + rel->r_offset - d_offset);
8232 if ((insn & (0x3f << 26)) == (15u << 26)
8233 && (insn & (0x1f << 16)) == 0 /* lis */)
8234 {
8235 bfd_byte *p;
8236 bfd_vma off;
8237 bfd_vma got_addr;
8238
8239 p = (contents + input_section->size
8240 - relax_info->workaround_size
8241 - relax_info->picfixup_size
8242 + picfixup_size);
8243 off = (p - contents) - (rel->r_offset - d_offset);
8244 if (off > 0x1fffffc || (off & 3) != 0)
8245 info->callbacks->einfo
8246 (_("%H: fixup branch overflow\n"),
8247 input_bfd, input_section, rel->r_offset);
8248
8249 bfd_put_32 (input_bfd, B | off,
8250 contents + rel->r_offset - d_offset);
8251 got_addr = (htab->elf.sgot->output_section->vma
8252 + htab->elf.sgot->output_offset
8253 + (h->got.offset & ~1));
8254 wrel->r_offset = (p - contents) + d_offset;
8255 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8256 wrel->r_addend = got_addr;
8257 insn &= ~0xffff;
8258 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8259 bfd_put_32 (input_bfd, insn, p);
8260
8261 /* Convert lis to lwz, loading address from GOT. */
8262 insn &= ~0xffff;
8263 insn ^= (32u ^ 15u) << 26;
8264 insn |= (insn & (0x1f << 21)) >> 5;
8265 insn |= got_addr & 0xffff;
8266 bfd_put_32 (input_bfd, insn, p + 4);
8267
8268 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8269 picfixup_size += 12;
8270
8271 /* Use one of the spare relocs, so --emit-relocs
8272 output is reasonable. */
8273 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8274 wrel++, rel++;
8275 rel->r_offset = wrel[-1].r_offset + 4;
8276 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8277 rel->r_addend = wrel[-1].r_addend;
8278
8279 /* Continue on as if we had a got reloc, to output
8280 dynamic reloc. */
8281 r_type = R_PPC_GOT16_LO;
8282 }
8283 else
8284 info->callbacks->einfo
8285 /* xgettext:c-format */
8286 (_("%H: error: %s with unexpected instruction %x\n"),
8287 input_bfd, input_section, rel->r_offset,
8288 "R_PPC_ADDR16_HA", insn);
8289 }
8290 else if (r_type == R_PPC_ADDR16_LO)
8291 {
8292 insn = bfd_get_32 (input_bfd,
8293 contents + rel->r_offset - d_offset);
8294 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8295 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8296 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8297 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8298 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8299 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8300 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8301 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8302 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8303 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8304 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8305 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8306 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8307 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8308 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8309 && (insn & 3) != 1)
8310 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8311 && ((insn & 3) == 0 || (insn & 3) == 3)))
8312 {
8313 /* Arrange to apply the reloc addend, if any. */
8314 relocation = 0;
8315 unresolved_reloc = FALSE;
8316 rel->r_info = ELF32_R_INFO (0, r_type);
8317 }
8318 else
8319 info->callbacks->einfo
8320 /* xgettext:c-format */
8321 (_("%H: error: %s with unexpected instruction %x\n"),
8322 input_bfd, input_section, rel->r_offset,
8323 "R_PPC_ADDR16_LO", insn);
8324 }
8325 }
8326
8327 ifunc = NULL;
8328 if (!htab->is_vxworks)
8329 {
8330 struct plt_entry *ent;
8331
8332 if (h != NULL)
8333 {
8334 if (h->type == STT_GNU_IFUNC)
8335 ifunc = &h->plt.plist;
8336 }
8337 else if (local_got_offsets != NULL
8338 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8339 {
8340 struct plt_entry **local_plt;
8341
8342 local_plt = (struct plt_entry **) (local_got_offsets
8343 + symtab_hdr->sh_info);
8344 ifunc = local_plt + r_symndx;
8345 }
8346
8347 ent = NULL;
8348 if (ifunc != NULL
8349 && (!bfd_link_pic (info)
8350 || is_branch_reloc (r_type)))
8351 {
8352 addend = 0;
8353 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8354 addend = rel->r_addend;
8355 ent = find_plt_ent (ifunc, got2, addend);
8356 }
8357 if (ent != NULL)
8358 {
8359 if (bfd_link_pic (info)
8360 && ent->sec != got2
8361 && htab->plt_type != PLT_NEW
8362 && (!htab->elf.dynamic_sections_created
8363 || h == NULL
8364 || h->dynindx == -1))
8365 {
8366 /* Uh oh, we are going to create a pic glink stub
8367 for an ifunc (here for h == NULL and later in
8368 finish_dynamic_symbol for h != NULL), and
8369 apparently are using code compiled with
8370 -mbss-plt. The difficulty is that -mbss-plt code
8371 gives no indication via a magic PLTREL24 addend
8372 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8373 is pointing into a .got2 section (and how far
8374 into .got2). */
8375 info->callbacks->einfo
8376 /* xgettext:c-format */
8377 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8378 input_bfd, input_section, rel->r_offset, sym_name);
8379 }
8380 if (h == NULL && (ent->plt.offset & 1) == 0)
8381 {
8382 Elf_Internal_Rela rela;
8383 bfd_byte *loc;
8384
8385 rela.r_offset = (htab->elf.iplt->output_section->vma
8386 + htab->elf.iplt->output_offset
8387 + ent->plt.offset);
8388 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8389 rela.r_addend = relocation;
8390 loc = htab->elf.irelplt->contents;
8391 loc += (htab->elf.irelplt->reloc_count++
8392 * sizeof (Elf32_External_Rela));
8393 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8394 htab->local_ifunc_resolver = 1;
8395
8396 ent->plt.offset |= 1;
8397 }
8398 if (h == NULL && (ent->glink_offset & 1) == 0)
8399 {
8400 unsigned char *p = ((unsigned char *) htab->glink->contents
8401 + ent->glink_offset);
8402 write_glink_stub (ent, htab->elf.iplt, p, info);
8403 ent->glink_offset |= 1;
8404 }
8405
8406 unresolved_reloc = FALSE;
8407 if (htab->plt_type == PLT_NEW
8408 || !htab->elf.dynamic_sections_created
8409 || h == NULL
8410 || h->dynindx == -1)
8411 relocation = (htab->glink->output_section->vma
8412 + htab->glink->output_offset
8413 + (ent->glink_offset & ~1));
8414 else
8415 relocation = (htab->elf.splt->output_section->vma
8416 + htab->elf.splt->output_offset
8417 + ent->plt.offset);
8418 }
8419 }
8420
8421 addend = rel->r_addend;
8422 tls_type = 0;
8423 howto = NULL;
8424 if (r_type < R_PPC_max)
8425 howto = ppc_elf_howto_table[r_type];
8426 switch (r_type)
8427 {
8428 default:
8429 info->callbacks->einfo
8430 /* xgettext:c-format */
8431 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8432 input_bfd, (int) r_type, sym_name);
8433
8434 bfd_set_error (bfd_error_bad_value);
8435 ret = FALSE;
8436 goto copy_reloc;
8437
8438 case R_PPC_NONE:
8439 case R_PPC_TLS:
8440 case R_PPC_TLSGD:
8441 case R_PPC_TLSLD:
8442 case R_PPC_EMB_MRKREF:
8443 case R_PPC_GNU_VTINHERIT:
8444 case R_PPC_GNU_VTENTRY:
8445 goto copy_reloc;
8446
8447 /* GOT16 relocations. Like an ADDR16 using the symbol's
8448 address in the GOT as relocation value instead of the
8449 symbol's value itself. Also, create a GOT entry for the
8450 symbol and put the symbol value there. */
8451 case R_PPC_GOT_TLSGD16:
8452 case R_PPC_GOT_TLSGD16_LO:
8453 case R_PPC_GOT_TLSGD16_HI:
8454 case R_PPC_GOT_TLSGD16_HA:
8455 tls_type = TLS_TLS | TLS_GD;
8456 goto dogot;
8457
8458 case R_PPC_GOT_TLSLD16:
8459 case R_PPC_GOT_TLSLD16_LO:
8460 case R_PPC_GOT_TLSLD16_HI:
8461 case R_PPC_GOT_TLSLD16_HA:
8462 tls_type = TLS_TLS | TLS_LD;
8463 goto dogot;
8464
8465 case R_PPC_GOT_TPREL16:
8466 case R_PPC_GOT_TPREL16_LO:
8467 case R_PPC_GOT_TPREL16_HI:
8468 case R_PPC_GOT_TPREL16_HA:
8469 tls_type = TLS_TLS | TLS_TPREL;
8470 goto dogot;
8471
8472 case R_PPC_GOT_DTPREL16:
8473 case R_PPC_GOT_DTPREL16_LO:
8474 case R_PPC_GOT_DTPREL16_HI:
8475 case R_PPC_GOT_DTPREL16_HA:
8476 tls_type = TLS_TLS | TLS_DTPREL;
8477 goto dogot;
8478
8479 case R_PPC_GOT16:
8480 case R_PPC_GOT16_LO:
8481 case R_PPC_GOT16_HI:
8482 case R_PPC_GOT16_HA:
8483 tls_mask = 0;
8484 dogot:
8485 {
8486 /* Relocation is to the entry for this symbol in the global
8487 offset table. */
8488 bfd_vma off;
8489 bfd_vma *offp;
8490 unsigned long indx;
8491
8492 if (htab->elf.sgot == NULL)
8493 abort ();
8494
8495 indx = 0;
8496 if (tls_type == (TLS_TLS | TLS_LD)
8497 && (h == NULL
8498 || !h->def_dynamic))
8499 offp = &htab->tlsld_got.offset;
8500 else if (h != NULL)
8501 {
8502 if (!htab->elf.dynamic_sections_created
8503 || h->dynindx == -1
8504 || SYMBOL_REFERENCES_LOCAL (info, h)
8505 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8506 && h->root.type == bfd_link_hash_undefweak))
8507 /* This is actually a static link, or it is a
8508 -Bsymbolic link and the symbol is defined
8509 locally, or the symbol was forced to be local
8510 because of a version file. */
8511 ;
8512 else
8513 {
8514 indx = h->dynindx;
8515 unresolved_reloc = FALSE;
8516 }
8517 offp = &h->got.offset;
8518 }
8519 else
8520 {
8521 if (local_got_offsets == NULL)
8522 abort ();
8523 offp = &local_got_offsets[r_symndx];
8524 }
8525
8526 /* The offset must always be a multiple of 4. We use the
8527 least significant bit to record whether we have already
8528 processed this entry. */
8529 off = *offp;
8530 if ((off & 1) != 0)
8531 off &= ~1;
8532 else
8533 {
8534 unsigned int tls_m = (tls_mask
8535 & (TLS_LD | TLS_GD | TLS_DTPREL
8536 | TLS_TPREL | TLS_TPRELGD));
8537
8538 if (offp == &htab->tlsld_got.offset)
8539 tls_m = TLS_LD;
8540 else if (h == NULL
8541 || !h->def_dynamic)
8542 tls_m &= ~TLS_LD;
8543
8544 /* We might have multiple got entries for this sym.
8545 Initialize them all. */
8546 do
8547 {
8548 int tls_ty = 0;
8549
8550 if ((tls_m & TLS_LD) != 0)
8551 {
8552 tls_ty = TLS_TLS | TLS_LD;
8553 tls_m &= ~TLS_LD;
8554 }
8555 else if ((tls_m & TLS_GD) != 0)
8556 {
8557 tls_ty = TLS_TLS | TLS_GD;
8558 tls_m &= ~TLS_GD;
8559 }
8560 else if ((tls_m & TLS_DTPREL) != 0)
8561 {
8562 tls_ty = TLS_TLS | TLS_DTPREL;
8563 tls_m &= ~TLS_DTPREL;
8564 }
8565 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8566 {
8567 tls_ty = TLS_TLS | TLS_TPREL;
8568 tls_m = 0;
8569 }
8570
8571 /* Generate relocs for the dynamic linker. */
8572 if (indx != 0
8573 || (bfd_link_pic (info)
8574 && (h == NULL
8575 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8576 || h->root.type != bfd_link_hash_undefweak
8577 || offp == &htab->tlsld_got.offset)))
8578 {
8579 asection *rsec = htab->elf.srelgot;
8580 bfd_byte * loc;
8581
8582 if (ifunc != NULL)
8583 {
8584 rsec = htab->elf.irelplt;
8585 if (indx == 0)
8586 htab->local_ifunc_resolver = 1;
8587 else if (is_static_defined (h))
8588 htab->maybe_local_ifunc_resolver = 1;
8589 }
8590 outrel.r_offset = (htab->elf.sgot->output_section->vma
8591 + htab->elf.sgot->output_offset
8592 + off);
8593 outrel.r_addend = 0;
8594 if (tls_ty & (TLS_LD | TLS_GD))
8595 {
8596 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8597 if (tls_ty == (TLS_TLS | TLS_GD))
8598 {
8599 loc = rsec->contents;
8600 loc += (rsec->reloc_count++
8601 * sizeof (Elf32_External_Rela));
8602 bfd_elf32_swap_reloca_out (output_bfd,
8603 &outrel, loc);
8604 outrel.r_offset += 4;
8605 outrel.r_info
8606 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8607 }
8608 }
8609 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8610 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8611 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8612 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8613 else if (indx != 0)
8614 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8615 else if (ifunc != NULL)
8616 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8617 else
8618 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8619 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8620 {
8621 outrel.r_addend += relocation;
8622 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8623 {
8624 if (htab->elf.tls_sec == NULL)
8625 outrel.r_addend = 0;
8626 else
8627 outrel.r_addend -= htab->elf.tls_sec->vma;
8628 }
8629 }
8630 loc = rsec->contents;
8631 loc += (rsec->reloc_count++
8632 * sizeof (Elf32_External_Rela));
8633 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8634 }
8635
8636 /* Init the .got section contents if we're not
8637 emitting a reloc. */
8638 else
8639 {
8640 bfd_vma value = relocation;
8641 int tlsopt = (htab->plt_type == PLT_NEW
8642 && !htab->params->no_tls_get_addr_opt
8643 && htab->tls_get_addr != NULL
8644 && htab->tls_get_addr->plt.plist != NULL);
8645
8646 if (tls_ty != 0)
8647 {
8648 if (htab->elf.tls_sec == NULL)
8649 value = 0;
8650 else
8651 {
8652 if (tls_ty & TLS_LD)
8653 value = 0;
8654 else
8655 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8656 if ((tls_ty & TLS_TPREL)
8657 || (tlsopt && !(tls_ty & TLS_DTPREL)))
8658 value += DTP_OFFSET - TP_OFFSET;
8659 }
8660
8661 if (tls_ty & (TLS_LD | TLS_GD))
8662 {
8663 bfd_put_32 (input_bfd, value,
8664 htab->elf.sgot->contents + off + 4);
8665 value = !tlsopt;
8666 }
8667 }
8668 bfd_put_32 (input_bfd, value,
8669 htab->elf.sgot->contents + off);
8670 }
8671
8672 off += 4;
8673 if (tls_ty & (TLS_LD | TLS_GD))
8674 off += 4;
8675 }
8676 while (tls_m != 0);
8677
8678 off = *offp;
8679 *offp = off | 1;
8680 }
8681
8682 if (off >= (bfd_vma) -2)
8683 abort ();
8684
8685 if ((tls_type & TLS_TLS) != 0)
8686 {
8687 if (tls_type != (TLS_TLS | TLS_LD))
8688 {
8689 if ((tls_mask & TLS_LD) != 0
8690 && !(h == NULL
8691 || !h->def_dynamic))
8692 off += 8;
8693 if (tls_type != (TLS_TLS | TLS_GD))
8694 {
8695 if ((tls_mask & TLS_GD) != 0)
8696 off += 8;
8697 if (tls_type != (TLS_TLS | TLS_DTPREL))
8698 {
8699 if ((tls_mask & TLS_DTPREL) != 0)
8700 off += 4;
8701 }
8702 }
8703 }
8704 }
8705
8706 /* If here for a picfixup, we're done. */
8707 if (r_type != ELF32_R_TYPE (rel->r_info))
8708 goto copy_reloc;
8709
8710 relocation = (htab->elf.sgot->output_section->vma
8711 + htab->elf.sgot->output_offset
8712 + off
8713 - SYM_VAL (htab->elf.hgot));
8714
8715 /* Addends on got relocations don't make much sense.
8716 x+off@got is actually x@got+off, and since the got is
8717 generated by a hash table traversal, the value in the
8718 got at entry m+n bears little relation to the entry m. */
8719 if (addend != 0)
8720 info->callbacks->einfo
8721 /* xgettext:c-format */
8722 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8723 input_bfd, input_section, rel->r_offset,
8724 howto->name,
8725 sym_name);
8726 }
8727 break;
8728
8729 /* Relocations that need no special processing. */
8730 case R_PPC_LOCAL24PC:
8731 /* It makes no sense to point a local relocation
8732 at a symbol not in this object. */
8733 if (unresolved_reloc)
8734 {
8735 (*info->callbacks->undefined_symbol) (info,
8736 h->root.root.string,
8737 input_bfd,
8738 input_section,
8739 rel->r_offset,
8740 TRUE);
8741 goto copy_reloc;
8742 }
8743 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8744 {
8745 /* @local on an ifunc does not really make sense since
8746 the ifunc resolver can take you anywhere. More
8747 seriously, calls to ifuncs must go through a plt call
8748 stub, and for pic the plt call stubs uses r30 to
8749 access the PLT. The problem is that a call that is
8750 local won't have the +32k reloc addend trick marking
8751 -fPIC code, so the linker won't know whether r30 is
8752 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8753 /* xgettext:c-format */
8754 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8755 input_bfd, input_section, rel->r_offset,
8756 h->root.root.string);
8757 }
8758 break;
8759
8760 case R_PPC_DTPREL16:
8761 case R_PPC_DTPREL16_LO:
8762 case R_PPC_DTPREL16_HI:
8763 case R_PPC_DTPREL16_HA:
8764 if (htab->elf.tls_sec != NULL)
8765 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8766 break;
8767
8768 /* Relocations that may need to be propagated if this is a shared
8769 object. */
8770 case R_PPC_TPREL16:
8771 case R_PPC_TPREL16_LO:
8772 case R_PPC_TPREL16_HI:
8773 case R_PPC_TPREL16_HA:
8774 if (h != NULL
8775 && h->root.type == bfd_link_hash_undefweak
8776 && h->dynindx == -1)
8777 {
8778 /* Make this relocation against an undefined weak symbol
8779 resolve to zero. This is really just a tweak, since
8780 code using weak externs ought to check that they are
8781 defined before using them. */
8782 bfd_byte *p = contents + rel->r_offset - d_offset;
8783 unsigned int insn = bfd_get_32 (input_bfd, p);
8784 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8785 if (insn != 0)
8786 bfd_put_32 (input_bfd, insn, p);
8787 break;
8788 }
8789 if (htab->elf.tls_sec != NULL)
8790 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8791 /* The TPREL16 relocs shouldn't really be used in shared
8792 libs as they will result in DT_TEXTREL being set, but
8793 support them anyway. */
8794 goto dodyn;
8795
8796 case R_PPC_TPREL32:
8797 if (htab->elf.tls_sec != NULL)
8798 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8799 goto dodyn;
8800
8801 case R_PPC_DTPREL32:
8802 if (htab->elf.tls_sec != NULL)
8803 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8804 goto dodyn;
8805
8806 case R_PPC_DTPMOD32:
8807 relocation = 1;
8808 addend = 0;
8809 goto dodyn;
8810
8811 case R_PPC_REL16:
8812 case R_PPC_REL16_LO:
8813 case R_PPC_REL16_HI:
8814 case R_PPC_REL16_HA:
8815 case R_PPC_REL16DX_HA:
8816 break;
8817
8818 case R_PPC_REL32:
8819 if (h == NULL || h == htab->elf.hgot)
8820 break;
8821 /* fall through */
8822
8823 case R_PPC_ADDR32:
8824 case R_PPC_ADDR16:
8825 case R_PPC_ADDR16_LO:
8826 case R_PPC_ADDR16_HI:
8827 case R_PPC_ADDR16_HA:
8828 case R_PPC_UADDR32:
8829 case R_PPC_UADDR16:
8830 goto dodyn;
8831
8832 case R_PPC_VLE_REL8:
8833 case R_PPC_VLE_REL15:
8834 case R_PPC_VLE_REL24:
8835 case R_PPC_REL24:
8836 case R_PPC_REL14:
8837 case R_PPC_REL14_BRTAKEN:
8838 case R_PPC_REL14_BRNTAKEN:
8839 /* If these relocations are not to a named symbol, they can be
8840 handled right here, no need to bother the dynamic linker. */
8841 if (SYMBOL_CALLS_LOCAL (info, h)
8842 || h == htab->elf.hgot)
8843 break;
8844 /* fall through */
8845
8846 case R_PPC_ADDR24:
8847 case R_PPC_ADDR14:
8848 case R_PPC_ADDR14_BRTAKEN:
8849 case R_PPC_ADDR14_BRNTAKEN:
8850 if (h != NULL && !bfd_link_pic (info))
8851 break;
8852 /* fall through */
8853
8854 dodyn:
8855 if ((input_section->flags & SEC_ALLOC) == 0
8856 || is_vxworks_tls)
8857 break;
8858
8859 if ((bfd_link_pic (info)
8860 && !(h != NULL
8861 && ((h->root.type == bfd_link_hash_undefined
8862 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8863 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8864 || (h->root.type == bfd_link_hash_undefweak
8865 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8866 && (must_be_dyn_reloc (info, r_type)
8867 || !SYMBOL_CALLS_LOCAL (info, h)))
8868 || (ELIMINATE_COPY_RELOCS
8869 && !bfd_link_pic (info)
8870 && h != NULL
8871 && h->dynindx != -1
8872 && !h->non_got_ref
8873 && !h->def_regular
8874 && !(h->protected_def
8875 && ppc_elf_hash_entry (h)->has_addr16_ha
8876 && ppc_elf_hash_entry (h)->has_addr16_lo
8877 && htab->params->pic_fixup > 0)))
8878 {
8879 int skip;
8880 bfd_byte *loc;
8881 asection *sreloc;
8882 long indx = 0;
8883
8884 #ifdef DEBUG
8885 fprintf (stderr, "ppc_elf_relocate_section needs to "
8886 "create relocation for %s\n",
8887 (h && h->root.root.string
8888 ? h->root.root.string : "<unknown>"));
8889 #endif
8890
8891 /* When generating a shared object, these relocations
8892 are copied into the output file to be resolved at run
8893 time. */
8894 skip = 0;
8895 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8896 input_section,
8897 rel->r_offset);
8898 if (outrel.r_offset == (bfd_vma) -1
8899 || outrel.r_offset == (bfd_vma) -2)
8900 skip = (int) outrel.r_offset;
8901 outrel.r_offset += (input_section->output_section->vma
8902 + input_section->output_offset);
8903
8904 if (skip)
8905 memset (&outrel, 0, sizeof outrel);
8906 else if ((h != NULL
8907 && (h->root.type == bfd_link_hash_undefined
8908 || h->root.type == bfd_link_hash_undefweak))
8909 || !SYMBOL_REFERENCES_LOCAL (info, h))
8910 {
8911 indx = h->dynindx;
8912 BFD_ASSERT (indx != -1);
8913 unresolved_reloc = FALSE;
8914 outrel.r_info = ELF32_R_INFO (indx, r_type);
8915 outrel.r_addend = rel->r_addend;
8916 }
8917 else
8918 {
8919 outrel.r_addend = relocation + rel->r_addend;
8920
8921 if (r_type != R_PPC_ADDR32)
8922 {
8923 if (ifunc != NULL)
8924 {
8925 /* If we get here when building a static
8926 executable, then the libc startup function
8927 responsible for applying indirect function
8928 relocations is going to complain about
8929 the reloc type.
8930 If we get here when building a dynamic
8931 executable, it will be because we have
8932 a text relocation. The dynamic loader
8933 will set the text segment writable and
8934 non-executable to apply text relocations.
8935 So we'll segfault when trying to run the
8936 indirection function to resolve the reloc. */
8937 info->callbacks->einfo
8938 /* xgettext:c-format */
8939 (_("%H: relocation %s for indirect "
8940 "function %s unsupported\n"),
8941 input_bfd, input_section, rel->r_offset,
8942 howto->name,
8943 sym_name);
8944 ret = FALSE;
8945 }
8946 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8947 ;
8948 else if (sec == NULL || sec->owner == NULL)
8949 {
8950 bfd_set_error (bfd_error_bad_value);
8951 ret = FALSE;
8952 }
8953 else
8954 {
8955 asection *osec;
8956
8957 /* We are turning this relocation into one
8958 against a section symbol. It would be
8959 proper to subtract the symbol's value,
8960 osec->vma, from the emitted reloc addend,
8961 but ld.so expects buggy relocs.
8962 FIXME: Why not always use a zero index? */
8963 osec = sec->output_section;
8964 indx = elf_section_data (osec)->dynindx;
8965 if (indx == 0)
8966 {
8967 osec = htab->elf.text_index_section;
8968 indx = elf_section_data (osec)->dynindx;
8969 }
8970 BFD_ASSERT (indx != 0);
8971 #ifdef DEBUG
8972 if (indx == 0)
8973 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8974 indx, osec->name, osec->flags,
8975 h->root.root.string);
8976 #endif
8977 }
8978
8979 outrel.r_info = ELF32_R_INFO (indx, r_type);
8980 }
8981 else if (ifunc != NULL)
8982 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8983 else
8984 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8985 }
8986
8987 sreloc = elf_section_data (input_section)->sreloc;
8988 if (ifunc)
8989 {
8990 sreloc = htab->elf.irelplt;
8991 if (indx == 0)
8992 htab->local_ifunc_resolver = 1;
8993 else if (is_static_defined (h))
8994 htab->maybe_local_ifunc_resolver = 1;
8995 }
8996 if (sreloc == NULL)
8997 return FALSE;
8998
8999 loc = sreloc->contents;
9000 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9001 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9002
9003 if (skip == -1)
9004 goto copy_reloc;
9005
9006 /* This reloc will be computed at runtime. Clear the memory
9007 so that it contains a predictable value for prelink. */
9008 if (!skip)
9009 {
9010 relocation = howto->pc_relative ? outrel.r_offset : 0;
9011 addend = 0;
9012 break;
9013 }
9014 }
9015 else if (r_type == R_PPC_DTPMOD32
9016 && htab->plt_type == PLT_NEW
9017 && !htab->params->no_tls_get_addr_opt
9018 && htab->tls_get_addr != NULL
9019 && htab->tls_get_addr->plt.plist != NULL)
9020 {
9021 /* Set up for __tls_get_addr_opt stub when this entry
9022 does not have dynamic relocs. */
9023 relocation = 0;
9024 /* Set up the next word for local dynamic. If it turns
9025 out to be global dynamic, the reloc will overwrite
9026 this value. */
9027 if (rel->r_offset + 8 <= input_section->size)
9028 bfd_put_32 (input_bfd, DTP_OFFSET - TP_OFFSET,
9029 contents + rel->r_offset + 4);
9030 }
9031 else if (r_type == R_PPC_DTPREL32
9032 && htab->plt_type == PLT_NEW
9033 && !htab->params->no_tls_get_addr_opt
9034 && htab->tls_get_addr != NULL
9035 && htab->tls_get_addr->plt.plist != NULL
9036 && rel > relocs
9037 && rel[-1].r_info == ELF32_R_INFO (r_symndx, R_PPC_DTPMOD32)
9038 && rel[-1].r_offset + 4 == rel->r_offset)
9039 {
9040 /* __tls_get_addr_opt stub value. */
9041 addend += DTP_OFFSET - TP_OFFSET;
9042 }
9043 break;
9044
9045 case R_PPC_RELAX_PLT:
9046 case R_PPC_RELAX_PLTREL24:
9047 if (h != NULL)
9048 {
9049 struct plt_entry *ent;
9050 bfd_vma got2_addend = 0;
9051
9052 if (r_type == R_PPC_RELAX_PLTREL24)
9053 {
9054 if (bfd_link_pic (info))
9055 got2_addend = addend;
9056 addend = 0;
9057 }
9058 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9059 if (htab->plt_type == PLT_NEW)
9060 relocation = (htab->glink->output_section->vma
9061 + htab->glink->output_offset
9062 + ent->glink_offset);
9063 else
9064 relocation = (htab->elf.splt->output_section->vma
9065 + htab->elf.splt->output_offset
9066 + ent->plt.offset);
9067 }
9068 /* Fall through. */
9069
9070 case R_PPC_RELAX:
9071 {
9072 const int *stub;
9073 size_t size;
9074 size_t insn_offset = rel->r_offset;
9075 unsigned int insn;
9076
9077 if (bfd_link_pic (info))
9078 {
9079 relocation -= (input_section->output_section->vma
9080 + input_section->output_offset
9081 + rel->r_offset - 4);
9082 stub = shared_stub_entry;
9083 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9084 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9085 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9086 stub += 3;
9087 size = ARRAY_SIZE (shared_stub_entry) - 3;
9088 }
9089 else
9090 {
9091 stub = stub_entry;
9092 size = ARRAY_SIZE (stub_entry);
9093 }
9094
9095 relocation += addend;
9096 if (bfd_link_relocatable (info))
9097 relocation = 0;
9098
9099 /* First insn is HA, second is LO. */
9100 insn = *stub++;
9101 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9102 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9103 insn_offset += 4;
9104
9105 insn = *stub++;
9106 insn |= relocation & 0xffff;
9107 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9108 insn_offset += 4;
9109 size -= 2;
9110
9111 while (size != 0)
9112 {
9113 insn = *stub++;
9114 --size;
9115 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9116 insn_offset += 4;
9117 }
9118
9119 /* Rewrite the reloc and convert one of the trailing nop
9120 relocs to describe this relocation. */
9121 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9122 /* The relocs are at the bottom 2 bytes */
9123 wrel->r_offset = rel->r_offset + d_offset;
9124 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9125 wrel->r_addend = rel->r_addend;
9126 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9127 wrel++, rel++;
9128 wrel->r_offset += 4;
9129 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9130 }
9131 continue;
9132
9133 /* Indirect .sdata relocation. */
9134 case R_PPC_EMB_SDAI16:
9135 BFD_ASSERT (htab->sdata[0].section != NULL);
9136 if (!is_static_defined (htab->sdata[0].sym))
9137 {
9138 unresolved_reloc = TRUE;
9139 break;
9140 }
9141 relocation
9142 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9143 h, relocation, rel);
9144 addend = 0;
9145 break;
9146
9147 /* Indirect .sdata2 relocation. */
9148 case R_PPC_EMB_SDA2I16:
9149 BFD_ASSERT (htab->sdata[1].section != NULL);
9150 if (!is_static_defined (htab->sdata[1].sym))
9151 {
9152 unresolved_reloc = TRUE;
9153 break;
9154 }
9155 relocation
9156 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9157 h, relocation, rel);
9158 addend = 0;
9159 break;
9160
9161 /* Handle the TOC16 reloc. We want to use the offset within the .got
9162 section, not the actual VMA. This is appropriate when generating
9163 an embedded ELF object, for which the .got section acts like the
9164 AIX .toc section. */
9165 case R_PPC_TOC16: /* phony GOT16 relocations */
9166 if (sec == NULL || sec->output_section == NULL)
9167 {
9168 unresolved_reloc = TRUE;
9169 break;
9170 }
9171 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9172 ".got") == 0
9173 || strcmp (bfd_get_section_name (sec->owner, sec),
9174 ".cgot") == 0);
9175
9176 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9177 break;
9178
9179 case R_PPC_PLTREL24:
9180 if (h != NULL && ifunc == NULL)
9181 {
9182 struct plt_entry *ent;
9183
9184 ent = find_plt_ent (&h->plt.plist, got2,
9185 bfd_link_pic (info) ? addend : 0);
9186 if (ent == NULL
9187 || htab->elf.splt == NULL)
9188 {
9189 /* We didn't make a PLT entry for this symbol. This
9190 happens when statically linking PIC code, or when
9191 using -Bsymbolic. */
9192 }
9193 else
9194 {
9195 /* Relocation is to the entry for this symbol in the
9196 procedure linkage table. */
9197 unresolved_reloc = FALSE;
9198 if (htab->plt_type == PLT_NEW)
9199 relocation = (htab->glink->output_section->vma
9200 + htab->glink->output_offset
9201 + ent->glink_offset);
9202 else
9203 relocation = (htab->elf.splt->output_section->vma
9204 + htab->elf.splt->output_offset
9205 + ent->plt.offset);
9206 }
9207 }
9208
9209 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9210 addend specifies the GOT pointer offset within .got2.
9211 Don't apply it to the relocation field. */
9212 addend = 0;
9213 break;
9214
9215 /* Relocate against _SDA_BASE_. */
9216 case R_PPC_SDAREL16:
9217 {
9218 const char *name;
9219 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9220
9221 if (sec == NULL
9222 || sec->output_section == NULL
9223 || !is_static_defined (sda))
9224 {
9225 unresolved_reloc = TRUE;
9226 break;
9227 }
9228 addend -= SYM_VAL (sda);
9229
9230 name = bfd_get_section_name (output_bfd, sec->output_section);
9231 if (!(strcmp (name, ".sdata") == 0
9232 || strcmp (name, ".sbss") == 0))
9233 {
9234 info->callbacks->einfo
9235 /* xgettext:c-format */
9236 (_("%P: %B: the target (%s) of a %s relocation is "
9237 "in the wrong output section (%s)\n"),
9238 input_bfd,
9239 sym_name,
9240 howto->name,
9241 name);
9242 }
9243 }
9244 break;
9245
9246 /* Relocate against _SDA2_BASE_. */
9247 case R_PPC_EMB_SDA2REL:
9248 {
9249 const char *name;
9250 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9251
9252 if (sec == NULL
9253 || sec->output_section == NULL
9254 || !is_static_defined (sda))
9255 {
9256 unresolved_reloc = TRUE;
9257 break;
9258 }
9259 addend -= SYM_VAL (sda);
9260
9261 name = bfd_get_section_name (output_bfd, sec->output_section);
9262 if (!(strcmp (name, ".sdata2") == 0
9263 || strcmp (name, ".sbss2") == 0))
9264 {
9265 info->callbacks->einfo
9266 /* xgettext:c-format */
9267 (_("%P: %B: the target (%s) of a %s relocation is "
9268 "in the wrong output section (%s)\n"),
9269 input_bfd,
9270 sym_name,
9271 howto->name,
9272 name);
9273 }
9274 }
9275 break;
9276
9277 case R_PPC_VLE_LO16A:
9278 relocation = relocation + addend;
9279 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9280 contents + rel->r_offset, relocation,
9281 split16a_type, htab->params->vle_reloc_fixup);
9282 goto copy_reloc;
9283
9284 case R_PPC_VLE_LO16D:
9285 relocation = relocation + addend;
9286 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9287 contents + rel->r_offset, relocation,
9288 split16d_type, htab->params->vle_reloc_fixup);
9289 goto copy_reloc;
9290
9291 case R_PPC_VLE_HI16A:
9292 relocation = (relocation + addend) >> 16;
9293 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9294 contents + rel->r_offset, relocation,
9295 split16a_type, htab->params->vle_reloc_fixup);
9296 goto copy_reloc;
9297
9298 case R_PPC_VLE_HI16D:
9299 relocation = (relocation + addend) >> 16;
9300 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9301 contents + rel->r_offset, relocation,
9302 split16d_type, htab->params->vle_reloc_fixup);
9303 goto copy_reloc;
9304
9305 case R_PPC_VLE_HA16A:
9306 relocation = (relocation + addend + 0x8000) >> 16;
9307 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9308 contents + rel->r_offset, relocation,
9309 split16a_type, htab->params->vle_reloc_fixup);
9310 goto copy_reloc;
9311
9312 case R_PPC_VLE_HA16D:
9313 relocation = (relocation + addend + 0x8000) >> 16;
9314 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9315 contents + rel->r_offset, relocation,
9316 split16d_type, htab->params->vle_reloc_fixup);
9317 goto copy_reloc;
9318
9319 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9320 case R_PPC_EMB_SDA21:
9321 case R_PPC_VLE_SDA21:
9322 case R_PPC_EMB_RELSDA:
9323 case R_PPC_VLE_SDA21_LO:
9324 {
9325 const char *name;
9326 int reg;
9327 unsigned int insn;
9328 struct elf_link_hash_entry *sda = NULL;
9329
9330 if (sec == NULL || sec->output_section == NULL)
9331 {
9332 unresolved_reloc = TRUE;
9333 break;
9334 }
9335
9336 name = bfd_get_section_name (output_bfd, sec->output_section);
9337 if (strcmp (name, ".sdata") == 0
9338 || strcmp (name, ".sbss") == 0)
9339 {
9340 reg = 13;
9341 sda = htab->sdata[0].sym;
9342 }
9343 else if (strcmp (name, ".sdata2") == 0
9344 || strcmp (name, ".sbss2") == 0)
9345 {
9346 reg = 2;
9347 sda = htab->sdata[1].sym;
9348 }
9349 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9350 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9351 {
9352 reg = 0;
9353 }
9354 else
9355 {
9356 info->callbacks->einfo
9357 /* xgettext:c-format */
9358 (_("%P: %B: the target (%s) of a %s relocation is "
9359 "in the wrong output section (%s)\n"),
9360 input_bfd,
9361 sym_name,
9362 howto->name,
9363 name);
9364
9365 bfd_set_error (bfd_error_bad_value);
9366 ret = FALSE;
9367 goto copy_reloc;
9368 }
9369
9370 if (sda != NULL)
9371 {
9372 if (!is_static_defined (sda))
9373 {
9374 unresolved_reloc = TRUE;
9375 break;
9376 }
9377 addend -= SYM_VAL (sda);
9378 }
9379
9380 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9381 if (reg == 0
9382 && (r_type == R_PPC_VLE_SDA21
9383 || r_type == R_PPC_VLE_SDA21_LO))
9384 {
9385 relocation = relocation + addend;
9386 addend = 0;
9387
9388 /* Force e_li insn, keeping RT from original insn. */
9389 insn &= 0x1f << 21;
9390 insn |= 28u << 26;
9391
9392 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9393 /* Top 4 bits of value to 17..20. */
9394 insn |= (relocation & 0xf0000) >> 5;
9395 /* Next 5 bits of the value to 11..15. */
9396 insn |= (relocation & 0xf800) << 5;
9397 /* And the final 11 bits of the value to bits 21 to 31. */
9398 insn |= relocation & 0x7ff;
9399
9400 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9401
9402 if (r_type == R_PPC_VLE_SDA21
9403 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9404 goto overflow;
9405 goto copy_reloc;
9406 }
9407 else if (r_type == R_PPC_EMB_SDA21
9408 || r_type == R_PPC_VLE_SDA21
9409 || r_type == R_PPC_VLE_SDA21_LO)
9410 {
9411 /* Fill in register field. */
9412 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9413 }
9414 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9415 }
9416 break;
9417
9418 case R_PPC_VLE_SDAREL_LO16A:
9419 case R_PPC_VLE_SDAREL_LO16D:
9420 case R_PPC_VLE_SDAREL_HI16A:
9421 case R_PPC_VLE_SDAREL_HI16D:
9422 case R_PPC_VLE_SDAREL_HA16A:
9423 case R_PPC_VLE_SDAREL_HA16D:
9424 {
9425 bfd_vma value;
9426 const char *name;
9427 struct elf_link_hash_entry *sda = NULL;
9428
9429 if (sec == NULL || sec->output_section == NULL)
9430 {
9431 unresolved_reloc = TRUE;
9432 break;
9433 }
9434
9435 name = bfd_get_section_name (output_bfd, sec->output_section);
9436 if (strcmp (name, ".sdata") == 0
9437 || strcmp (name, ".sbss") == 0)
9438 sda = htab->sdata[0].sym;
9439 else if (strcmp (name, ".sdata2") == 0
9440 || strcmp (name, ".sbss2") == 0)
9441 sda = htab->sdata[1].sym;
9442 else
9443 {
9444 _bfd_error_handler
9445 /* xgettext:c-format */
9446 (_("%B: the target (%s) of a %s relocation is "
9447 "in the wrong output section (%s)"),
9448 input_bfd,
9449 sym_name,
9450 howto->name,
9451 name);
9452
9453 bfd_set_error (bfd_error_bad_value);
9454 ret = FALSE;
9455 goto copy_reloc;
9456 }
9457
9458 if (sda == NULL || !is_static_defined (sda))
9459 {
9460 unresolved_reloc = TRUE;
9461 break;
9462 }
9463 value = relocation + addend - SYM_VAL (sda);
9464
9465 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9466 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9467 contents + rel->r_offset, value,
9468 split16a_type,
9469 htab->params->vle_reloc_fixup);
9470 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9471 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9472 contents + rel->r_offset, value,
9473 split16d_type,
9474 htab->params->vle_reloc_fixup);
9475 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9476 {
9477 value = value >> 16;
9478 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9479 contents + rel->r_offset, value,
9480 split16a_type,
9481 htab->params->vle_reloc_fixup);
9482 }
9483 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9484 {
9485 value = value >> 16;
9486 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9487 contents + rel->r_offset, value,
9488 split16d_type,
9489 htab->params->vle_reloc_fixup);
9490 }
9491 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9492 {
9493 value = (value + 0x8000) >> 16;
9494 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9495 contents + rel->r_offset, value,
9496 split16a_type,
9497 htab->params->vle_reloc_fixup);
9498 }
9499 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9500 {
9501 value = (value + 0x8000) >> 16;
9502 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9503 contents + rel->r_offset, value,
9504 split16d_type,
9505 htab->params->vle_reloc_fixup);
9506 }
9507 }
9508 goto copy_reloc;
9509
9510 /* Relocate against the beginning of the section. */
9511 case R_PPC_SECTOFF:
9512 case R_PPC_SECTOFF_LO:
9513 case R_PPC_SECTOFF_HI:
9514 case R_PPC_SECTOFF_HA:
9515 if (sec == NULL || sec->output_section == NULL)
9516 {
9517 unresolved_reloc = TRUE;
9518 break;
9519 }
9520 addend -= sec->output_section->vma;
9521 break;
9522
9523 /* Negative relocations. */
9524 case R_PPC_EMB_NADDR32:
9525 case R_PPC_EMB_NADDR16:
9526 case R_PPC_EMB_NADDR16_LO:
9527 case R_PPC_EMB_NADDR16_HI:
9528 case R_PPC_EMB_NADDR16_HA:
9529 addend -= 2 * relocation;
9530 break;
9531
9532 case R_PPC_COPY:
9533 case R_PPC_GLOB_DAT:
9534 case R_PPC_JMP_SLOT:
9535 case R_PPC_RELATIVE:
9536 case R_PPC_IRELATIVE:
9537 case R_PPC_PLT32:
9538 case R_PPC_PLTREL32:
9539 case R_PPC_PLT16_LO:
9540 case R_PPC_PLT16_HI:
9541 case R_PPC_PLT16_HA:
9542 case R_PPC_ADDR30:
9543 case R_PPC_EMB_RELSEC16:
9544 case R_PPC_EMB_RELST_LO:
9545 case R_PPC_EMB_RELST_HI:
9546 case R_PPC_EMB_RELST_HA:
9547 case R_PPC_EMB_BIT_FLD:
9548 info->callbacks->einfo
9549 /* xgettext:c-format */
9550 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9551 input_bfd,
9552 howto->name,
9553 sym_name);
9554
9555 bfd_set_error (bfd_error_invalid_operation);
9556 ret = FALSE;
9557 goto copy_reloc;
9558 }
9559
9560 /* Do any further special processing. */
9561 switch (r_type)
9562 {
9563 default:
9564 break;
9565
9566 case R_PPC_ADDR16_HA:
9567 case R_PPC_REL16_HA:
9568 case R_PPC_REL16DX_HA:
9569 case R_PPC_SECTOFF_HA:
9570 case R_PPC_TPREL16_HA:
9571 case R_PPC_DTPREL16_HA:
9572 case R_PPC_EMB_NADDR16_HA:
9573 case R_PPC_EMB_RELST_HA:
9574 /* It's just possible that this symbol is a weak symbol
9575 that's not actually defined anywhere. In that case,
9576 'sec' would be NULL, and we should leave the symbol
9577 alone (it will be set to zero elsewhere in the link). */
9578 if (sec == NULL)
9579 break;
9580 /* Fall through. */
9581
9582 case R_PPC_PLT16_HA:
9583 case R_PPC_GOT16_HA:
9584 case R_PPC_GOT_TLSGD16_HA:
9585 case R_PPC_GOT_TLSLD16_HA:
9586 case R_PPC_GOT_TPREL16_HA:
9587 case R_PPC_GOT_DTPREL16_HA:
9588 /* Add 0x10000 if sign bit in 0:15 is set.
9589 Bits 0:15 are not used. */
9590 addend += 0x8000;
9591 break;
9592
9593 case R_PPC_ADDR16:
9594 case R_PPC_ADDR16_LO:
9595 case R_PPC_GOT16:
9596 case R_PPC_GOT16_LO:
9597 case R_PPC_SDAREL16:
9598 case R_PPC_SECTOFF:
9599 case R_PPC_SECTOFF_LO:
9600 case R_PPC_DTPREL16:
9601 case R_PPC_DTPREL16_LO:
9602 case R_PPC_TPREL16:
9603 case R_PPC_TPREL16_LO:
9604 case R_PPC_GOT_TLSGD16:
9605 case R_PPC_GOT_TLSGD16_LO:
9606 case R_PPC_GOT_TLSLD16:
9607 case R_PPC_GOT_TLSLD16_LO:
9608 case R_PPC_GOT_DTPREL16:
9609 case R_PPC_GOT_DTPREL16_LO:
9610 case R_PPC_GOT_TPREL16:
9611 case R_PPC_GOT_TPREL16_LO:
9612 {
9613 /* The 32-bit ABI lacks proper relocations to deal with
9614 certain 64-bit instructions. Prevent damage to bits
9615 that make up part of the insn opcode. */
9616 unsigned int insn, mask, lobit;
9617
9618 insn = bfd_get_32 (input_bfd,
9619 contents + rel->r_offset - d_offset);
9620 mask = 0;
9621 if (is_insn_ds_form (insn))
9622 mask = 3;
9623 else if (is_insn_dq_form (insn))
9624 mask = 15;
9625 else
9626 break;
9627 relocation += addend;
9628 addend = insn & mask;
9629 lobit = mask & relocation;
9630 if (lobit != 0)
9631 {
9632 relocation ^= lobit;
9633 info->callbacks->einfo
9634 /* xgettext:c-format */
9635 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9636 input_bfd, input_section, rel->r_offset,
9637 howto->name, sym_name, mask + 1);
9638 bfd_set_error (bfd_error_bad_value);
9639 ret = FALSE;
9640 }
9641 }
9642 break;
9643 }
9644
9645 #ifdef DEBUG
9646 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9647 "offset = %ld, addend = %ld\n",
9648 howto->name,
9649 (int) r_type,
9650 sym_name,
9651 r_symndx,
9652 (long) rel->r_offset,
9653 (long) addend);
9654 #endif
9655
9656 if (unresolved_reloc
9657 && !((input_section->flags & SEC_DEBUGGING) != 0
9658 && h->def_dynamic)
9659 && _bfd_elf_section_offset (output_bfd, info, input_section,
9660 rel->r_offset) != (bfd_vma) -1)
9661 {
9662 info->callbacks->einfo
9663 /* xgettext:c-format */
9664 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9665 input_bfd, input_section, rel->r_offset,
9666 howto->name,
9667 sym_name);
9668 ret = FALSE;
9669 }
9670
9671 /* 16-bit fields in insns mostly have signed values, but a
9672 few insns have 16-bit unsigned values. Really, we should
9673 have different reloc types. */
9674 if (howto->complain_on_overflow != complain_overflow_dont
9675 && howto->dst_mask == 0xffff
9676 && (input_section->flags & SEC_CODE) != 0)
9677 {
9678 enum complain_overflow complain = complain_overflow_signed;
9679
9680 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9681 {
9682 unsigned int insn;
9683
9684 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9685 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9686 complain = complain_overflow_bitfield;
9687 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9688 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9689 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9690 complain = complain_overflow_unsigned;
9691 }
9692 if (howto->complain_on_overflow != complain)
9693 {
9694 alt_howto = *howto;
9695 alt_howto.complain_on_overflow = complain;
9696 howto = &alt_howto;
9697 }
9698 }
9699
9700 if (r_type == R_PPC_REL16DX_HA)
9701 {
9702 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9703 if (rel->r_offset + 4 > input_section->size)
9704 r = bfd_reloc_outofrange;
9705 else
9706 {
9707 unsigned int insn;
9708
9709 relocation += addend;
9710 relocation -= (rel->r_offset
9711 + input_section->output_offset
9712 + input_section->output_section->vma);
9713 relocation >>= 16;
9714 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9715 insn &= ~0x1fffc1;
9716 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9717 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9718 r = bfd_reloc_ok;
9719 }
9720 }
9721 else
9722 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9723 rel->r_offset, relocation, addend);
9724
9725 if (r != bfd_reloc_ok)
9726 {
9727 if (r == bfd_reloc_overflow)
9728 {
9729 overflow:
9730 /* On code like "if (foo) foo();" don't report overflow
9731 on a branch to zero when foo is undefined. */
9732 if (!warned
9733 && !(h != NULL
9734 && (h->root.type == bfd_link_hash_undefweak
9735 || h->root.type == bfd_link_hash_undefined)
9736 && is_branch_reloc (r_type)))
9737 info->callbacks->reloc_overflow
9738 (info, (h ? &h->root : NULL), sym_name, howto->name,
9739 rel->r_addend, input_bfd, input_section, rel->r_offset);
9740 }
9741 else
9742 {
9743 info->callbacks->einfo
9744 /* xgettext:c-format */
9745 (_("%H: %s reloc against `%s': error %d\n"),
9746 input_bfd, input_section, rel->r_offset,
9747 howto->name, sym_name, (int) r);
9748 ret = FALSE;
9749 }
9750 }
9751 copy_reloc:
9752 if (wrel != rel)
9753 *wrel = *rel;
9754 }
9755
9756 if (wrel != rel)
9757 {
9758 Elf_Internal_Shdr *rel_hdr;
9759 size_t deleted = rel - wrel;
9760
9761 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9762 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9763 if (rel_hdr->sh_size == 0)
9764 {
9765 /* It is too late to remove an empty reloc section. Leave
9766 one NONE reloc.
9767 ??? What is wrong with an empty section??? */
9768 rel_hdr->sh_size = rel_hdr->sh_entsize;
9769 deleted -= 1;
9770 wrel++;
9771 }
9772 relend = wrel;
9773 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9774 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9775 input_section->reloc_count -= deleted;
9776 }
9777
9778 #ifdef DEBUG
9779 fprintf (stderr, "\n");
9780 #endif
9781
9782 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9783 && input_section->size != input_section->rawsize
9784 && (strcmp (input_section->output_section->name, ".init") == 0
9785 || strcmp (input_section->output_section->name, ".fini") == 0))
9786 {
9787 /* Branch around the trampolines. */
9788 unsigned int insn = B + input_section->size - input_section->rawsize;
9789 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9790 }
9791
9792 if (htab->params->ppc476_workaround
9793 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9794 && (!bfd_link_relocatable (info)
9795 || (input_section->output_section->alignment_power
9796 >= htab->params->pagesize_p2)))
9797 {
9798 bfd_vma start_addr, end_addr, addr;
9799 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9800
9801 if (relax_info->workaround_size != 0)
9802 {
9803 bfd_byte *p;
9804 unsigned int n;
9805 bfd_byte fill[4];
9806
9807 bfd_put_32 (input_bfd, BA, fill);
9808 p = contents + input_section->size - relax_info->workaround_size;
9809 n = relax_info->workaround_size >> 2;
9810 while (n--)
9811 {
9812 memcpy (p, fill, 4);
9813 p += 4;
9814 }
9815 }
9816
9817 /* The idea is: Replace the last instruction on a page with a
9818 branch to a patch area. Put the insn there followed by a
9819 branch back to the next page. Complicated a little by
9820 needing to handle moved conditional branches, and by not
9821 wanting to touch data-in-text. */
9822
9823 start_addr = (input_section->output_section->vma
9824 + input_section->output_offset);
9825 end_addr = (start_addr + input_section->size
9826 - relax_info->workaround_size);
9827 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9828 addr < end_addr;
9829 addr += pagesize)
9830 {
9831 bfd_vma offset = addr - start_addr;
9832 Elf_Internal_Rela *lo, *hi;
9833 bfd_boolean is_data;
9834 bfd_vma patch_off, patch_addr;
9835 unsigned int insn;
9836
9837 /* Do we have a data reloc at this offset? If so, leave
9838 the word alone. */
9839 is_data = FALSE;
9840 lo = relocs;
9841 hi = relend;
9842 rel = NULL;
9843 while (lo < hi)
9844 {
9845 rel = lo + (hi - lo) / 2;
9846 if (rel->r_offset < offset)
9847 lo = rel + 1;
9848 else if (rel->r_offset > offset + 3)
9849 hi = rel;
9850 else
9851 {
9852 switch (ELF32_R_TYPE (rel->r_info))
9853 {
9854 case R_PPC_ADDR32:
9855 case R_PPC_UADDR32:
9856 case R_PPC_REL32:
9857 case R_PPC_ADDR30:
9858 is_data = TRUE;
9859 break;
9860 default:
9861 break;
9862 }
9863 break;
9864 }
9865 }
9866 if (is_data)
9867 continue;
9868
9869 /* Some instructions can be left alone too. Unconditional
9870 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9871 avoid the icache failure.
9872
9873 The problem occurs due to prefetch across a page boundary
9874 where stale instructions can be fetched from the next
9875 page, and the mechanism for flushing these bad
9876 instructions fails under certain circumstances. The
9877 unconditional branches:
9878 1) Branch: b, bl, ba, bla,
9879 2) Branch Conditional: bc, bca, bcl, bcla,
9880 3) Branch Conditional to Link Register: bclr, bclrl,
9881 where (2) and (3) have BO=0x14 making them unconditional,
9882 prevent the bad prefetch because the prefetch itself is
9883 affected by these instructions. This happens even if the
9884 instruction is not executed.
9885
9886 A bctr example:
9887 .
9888 . lis 9,new_page@ha
9889 . addi 9,9,new_page@l
9890 . mtctr 9
9891 . bctr
9892 . nop
9893 . nop
9894 . new_page:
9895 .
9896 The bctr is not predicted taken due to ctr not being
9897 ready, so prefetch continues on past the bctr into the
9898 new page which might have stale instructions. If they
9899 fail to be flushed, then they will be executed after the
9900 bctr executes. Either of the following modifications
9901 prevent the bad prefetch from happening in the first
9902 place:
9903 .
9904 . lis 9,new_page@ha lis 9,new_page@ha
9905 . addi 9,9,new_page@l addi 9,9,new_page@l
9906 . mtctr 9 mtctr 9
9907 . bctr bctr
9908 . nop b somewhere_else
9909 . b somewhere_else nop
9910 . new_page: new_page:
9911 . */
9912 insn = bfd_get_32 (input_bfd, contents + offset);
9913 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9914 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9915 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9916 || ((insn & (0x3f << 26)) == (19u << 26)
9917 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9918 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9919 continue;
9920
9921 patch_addr = (start_addr + input_section->size
9922 - relax_info->workaround_size);
9923 patch_addr = (patch_addr + 15) & -16;
9924 patch_off = patch_addr - start_addr;
9925 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9926
9927 if (rel != NULL
9928 && rel->r_offset >= offset
9929 && rel->r_offset < offset + 4)
9930 {
9931 asection *sreloc;
9932
9933 /* If the insn we are patching had a reloc, adjust the
9934 reloc r_offset so that the reloc applies to the moved
9935 location. This matters for -r and --emit-relocs. */
9936 if (rel + 1 != relend)
9937 {
9938 Elf_Internal_Rela tmp = *rel;
9939
9940 /* Keep the relocs sorted by r_offset. */
9941 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9942 relend[-1] = tmp;
9943 }
9944 relend[-1].r_offset += patch_off - offset;
9945
9946 /* Adjust REL16 addends too. */
9947 switch (ELF32_R_TYPE (relend[-1].r_info))
9948 {
9949 case R_PPC_REL16:
9950 case R_PPC_REL16_LO:
9951 case R_PPC_REL16_HI:
9952 case R_PPC_REL16_HA:
9953 relend[-1].r_addend += patch_off - offset;
9954 break;
9955 default:
9956 break;
9957 }
9958
9959 /* If we are building a PIE or shared library with
9960 non-PIC objects, perhaps we had a dynamic reloc too?
9961 If so, the dynamic reloc must move with the insn. */
9962 sreloc = elf_section_data (input_section)->sreloc;
9963 if (sreloc != NULL)
9964 {
9965 Elf32_External_Rela *slo, *shi, *srelend;
9966 bfd_vma soffset;
9967
9968 slo = (Elf32_External_Rela *) sreloc->contents;
9969 shi = srelend = slo + sreloc->reloc_count;
9970 soffset = (offset + input_section->output_section->vma
9971 + input_section->output_offset);
9972 while (slo < shi)
9973 {
9974 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9975 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9976 &outrel);
9977 if (outrel.r_offset < soffset)
9978 slo = srel + 1;
9979 else if (outrel.r_offset > soffset + 3)
9980 shi = srel;
9981 else
9982 {
9983 if (srel + 1 != srelend)
9984 {
9985 memmove (srel, srel + 1,
9986 (srelend - (srel + 1)) * sizeof (*srel));
9987 srel = srelend - 1;
9988 }
9989 outrel.r_offset += patch_off - offset;
9990 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9991 (bfd_byte *) srel);
9992 break;
9993 }
9994 }
9995 }
9996 }
9997 else
9998 rel = NULL;
9999
10000 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10001 && (insn & 2) == 0 /* relative */)
10002 {
10003 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10004
10005 delta += offset - patch_off;
10006 if (bfd_link_relocatable (info) && rel != NULL)
10007 delta = 0;
10008 if (!bfd_link_relocatable (info) && rel != NULL)
10009 {
10010 enum elf_ppc_reloc_type r_type;
10011
10012 r_type = ELF32_R_TYPE (relend[-1].r_info);
10013 if (r_type == R_PPC_REL14_BRTAKEN)
10014 insn |= BRANCH_PREDICT_BIT;
10015 else if (r_type == R_PPC_REL14_BRNTAKEN)
10016 insn &= ~BRANCH_PREDICT_BIT;
10017 else
10018 BFD_ASSERT (r_type == R_PPC_REL14);
10019
10020 if ((r_type == R_PPC_REL14_BRTAKEN
10021 || r_type == R_PPC_REL14_BRNTAKEN)
10022 && delta + 0x8000 < 0x10000
10023 && (bfd_signed_vma) delta < 0)
10024 insn ^= BRANCH_PREDICT_BIT;
10025 }
10026 if (delta + 0x8000 < 0x10000)
10027 {
10028 bfd_put_32 (input_bfd,
10029 (insn & ~0xfffc) | (delta & 0xfffc),
10030 contents + patch_off);
10031 patch_off += 4;
10032 bfd_put_32 (input_bfd,
10033 B | ((offset + 4 - patch_off) & 0x3fffffc),
10034 contents + patch_off);
10035 patch_off += 4;
10036 }
10037 else
10038 {
10039 if (rel != NULL)
10040 {
10041 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10042
10043 relend[-1].r_offset += 8;
10044 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10045 }
10046 bfd_put_32 (input_bfd,
10047 (insn & ~0xfffc) | 8,
10048 contents + patch_off);
10049 patch_off += 4;
10050 bfd_put_32 (input_bfd,
10051 B | ((offset + 4 - patch_off) & 0x3fffffc),
10052 contents + patch_off);
10053 patch_off += 4;
10054 bfd_put_32 (input_bfd,
10055 B | ((delta - 8) & 0x3fffffc),
10056 contents + patch_off);
10057 patch_off += 4;
10058 }
10059 }
10060 else
10061 {
10062 bfd_put_32 (input_bfd, insn, contents + patch_off);
10063 patch_off += 4;
10064 bfd_put_32 (input_bfd,
10065 B | ((offset + 4 - patch_off) & 0x3fffffc),
10066 contents + patch_off);
10067 patch_off += 4;
10068 }
10069 BFD_ASSERT (patch_off <= input_section->size);
10070 relax_info->workaround_size = input_section->size - patch_off;
10071 }
10072 }
10073
10074 return ret;
10075 }
10076 \f
10077 /* Finish up dynamic symbol handling. We set the contents of various
10078 dynamic sections here. */
10079
10080 static bfd_boolean
10081 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10082 struct bfd_link_info *info,
10083 struct elf_link_hash_entry *h,
10084 Elf_Internal_Sym *sym)
10085 {
10086 struct ppc_elf_link_hash_table *htab;
10087 struct plt_entry *ent;
10088 bfd_boolean doneone;
10089
10090 #ifdef DEBUG
10091 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10092 h->root.root.string);
10093 #endif
10094
10095 htab = ppc_elf_hash_table (info);
10096 BFD_ASSERT (htab->elf.dynobj != NULL);
10097
10098 doneone = FALSE;
10099 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10100 if (ent->plt.offset != (bfd_vma) -1)
10101 {
10102 if (!doneone)
10103 {
10104 Elf_Internal_Rela rela;
10105 bfd_byte *loc;
10106 bfd_vma reloc_index;
10107
10108 if (htab->plt_type == PLT_NEW
10109 || !htab->elf.dynamic_sections_created
10110 || h->dynindx == -1)
10111 reloc_index = ent->plt.offset / 4;
10112 else
10113 {
10114 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10115 / htab->plt_slot_size);
10116 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10117 && htab->plt_type == PLT_OLD)
10118 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10119 }
10120
10121 /* This symbol has an entry in the procedure linkage table.
10122 Set it up. */
10123 if (htab->plt_type == PLT_VXWORKS
10124 && htab->elf.dynamic_sections_created
10125 && h->dynindx != -1)
10126 {
10127 bfd_vma got_offset;
10128 const bfd_vma *plt_entry;
10129
10130 /* The first three entries in .got.plt are reserved. */
10131 got_offset = (reloc_index + 3) * 4;
10132
10133 /* Use the right PLT. */
10134 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10135 : ppc_elf_vxworks_plt_entry;
10136
10137 /* Fill in the .plt on VxWorks. */
10138 if (bfd_link_pic (info))
10139 {
10140 bfd_put_32 (output_bfd,
10141 plt_entry[0] | PPC_HA (got_offset),
10142 htab->elf.splt->contents + ent->plt.offset + 0);
10143 bfd_put_32 (output_bfd,
10144 plt_entry[1] | PPC_LO (got_offset),
10145 htab->elf.splt->contents + ent->plt.offset + 4);
10146 }
10147 else
10148 {
10149 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10150
10151 bfd_put_32 (output_bfd,
10152 plt_entry[0] | PPC_HA (got_loc),
10153 htab->elf.splt->contents + ent->plt.offset + 0);
10154 bfd_put_32 (output_bfd,
10155 plt_entry[1] | PPC_LO (got_loc),
10156 htab->elf.splt->contents + ent->plt.offset + 4);
10157 }
10158
10159 bfd_put_32 (output_bfd, plt_entry[2],
10160 htab->elf.splt->contents + ent->plt.offset + 8);
10161 bfd_put_32 (output_bfd, plt_entry[3],
10162 htab->elf.splt->contents + ent->plt.offset + 12);
10163
10164 /* This instruction is an immediate load. The value loaded is
10165 the byte offset of the R_PPC_JMP_SLOT relocation from the
10166 start of the .rela.plt section. The value is stored in the
10167 low-order 16 bits of the load instruction. */
10168 /* NOTE: It appears that this is now an index rather than a
10169 prescaled offset. */
10170 bfd_put_32 (output_bfd,
10171 plt_entry[4] | reloc_index,
10172 htab->elf.splt->contents + ent->plt.offset + 16);
10173 /* This instruction is a PC-relative branch whose target is
10174 the start of the PLT section. The address of this branch
10175 instruction is 20 bytes beyond the start of this PLT entry.
10176 The address is encoded in bits 6-29, inclusive. The value
10177 stored is right-shifted by two bits, permitting a 26-bit
10178 offset. */
10179 bfd_put_32 (output_bfd,
10180 (plt_entry[5]
10181 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10182 htab->elf.splt->contents + ent->plt.offset + 20);
10183 bfd_put_32 (output_bfd, plt_entry[6],
10184 htab->elf.splt->contents + ent->plt.offset + 24);
10185 bfd_put_32 (output_bfd, plt_entry[7],
10186 htab->elf.splt->contents + ent->plt.offset + 28);
10187
10188 /* Fill in the GOT entry corresponding to this PLT slot with
10189 the address immediately after the "bctr" instruction
10190 in this PLT entry. */
10191 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10192 + htab->elf.splt->output_offset
10193 + ent->plt.offset + 16),
10194 htab->elf.sgotplt->contents + got_offset);
10195
10196 if (!bfd_link_pic (info))
10197 {
10198 /* Fill in a couple of entries in .rela.plt.unloaded. */
10199 loc = htab->srelplt2->contents
10200 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10201 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10202 * sizeof (Elf32_External_Rela));
10203
10204 /* Provide the @ha relocation for the first instruction. */
10205 rela.r_offset = (htab->elf.splt->output_section->vma
10206 + htab->elf.splt->output_offset
10207 + ent->plt.offset + 2);
10208 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10209 R_PPC_ADDR16_HA);
10210 rela.r_addend = got_offset;
10211 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10212 loc += sizeof (Elf32_External_Rela);
10213
10214 /* Provide the @l relocation for the second instruction. */
10215 rela.r_offset = (htab->elf.splt->output_section->vma
10216 + htab->elf.splt->output_offset
10217 + ent->plt.offset + 6);
10218 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10219 R_PPC_ADDR16_LO);
10220 rela.r_addend = got_offset;
10221 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10222 loc += sizeof (Elf32_External_Rela);
10223
10224 /* Provide a relocation for the GOT entry corresponding to this
10225 PLT slot. Point it at the middle of the .plt entry. */
10226 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10227 + htab->elf.sgotplt->output_offset
10228 + got_offset);
10229 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10230 R_PPC_ADDR32);
10231 rela.r_addend = ent->plt.offset + 16;
10232 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10233 }
10234
10235 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10236 In particular, the offset for the relocation is not the
10237 address of the PLT entry for this function, as specified
10238 by the ABI. Instead, the offset is set to the address of
10239 the GOT slot for this function. See EABI 4.4.4.1. */
10240 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10241 + htab->elf.sgotplt->output_offset
10242 + got_offset);
10243
10244 }
10245 else
10246 {
10247 asection *splt = htab->elf.splt;
10248 if (!htab->elf.dynamic_sections_created
10249 || h->dynindx == -1)
10250 splt = htab->elf.iplt;
10251
10252 rela.r_offset = (splt->output_section->vma
10253 + splt->output_offset
10254 + ent->plt.offset);
10255 if (htab->plt_type == PLT_OLD
10256 || !htab->elf.dynamic_sections_created
10257 || h->dynindx == -1)
10258 {
10259 /* We don't need to fill in the .plt. The ppc dynamic
10260 linker will fill it in. */
10261 }
10262 else
10263 {
10264 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10265 + htab->glink->output_section->vma
10266 + htab->glink->output_offset);
10267 bfd_put_32 (output_bfd, val,
10268 splt->contents + ent->plt.offset);
10269 }
10270 }
10271
10272 /* Fill in the entry in the .rela.plt section. */
10273 rela.r_addend = 0;
10274 if (!htab->elf.dynamic_sections_created
10275 || h->dynindx == -1)
10276 {
10277 BFD_ASSERT (h->type == STT_GNU_IFUNC
10278 && h->def_regular
10279 && (h->root.type == bfd_link_hash_defined
10280 || h->root.type == bfd_link_hash_defweak));
10281 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10282 rela.r_addend = SYM_VAL (h);
10283 }
10284 else
10285 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10286
10287 if (!htab->elf.dynamic_sections_created
10288 || h->dynindx == -1)
10289 {
10290 loc = (htab->elf.irelplt->contents
10291 + (htab->elf.irelplt->reloc_count++
10292 * sizeof (Elf32_External_Rela)));
10293 htab->local_ifunc_resolver = 1;
10294 }
10295 else
10296 {
10297 loc = (htab->elf.srelplt->contents
10298 + reloc_index * sizeof (Elf32_External_Rela));
10299 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10300 htab->maybe_local_ifunc_resolver = 1;
10301 }
10302 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10303
10304 if (!h->def_regular)
10305 {
10306 /* Mark the symbol as undefined, rather than as
10307 defined in the .plt section. Leave the value if
10308 there were any relocations where pointer equality
10309 matters (this is a clue for the dynamic linker, to
10310 make function pointer comparisons work between an
10311 application and shared library), otherwise set it
10312 to zero. */
10313 sym->st_shndx = SHN_UNDEF;
10314 if (!h->pointer_equality_needed)
10315 sym->st_value = 0;
10316 else if (!h->ref_regular_nonweak)
10317 {
10318 /* This breaks function pointer comparisons, but
10319 that is better than breaking tests for a NULL
10320 function pointer. */
10321 sym->st_value = 0;
10322 }
10323 }
10324 else if (h->type == STT_GNU_IFUNC
10325 && !bfd_link_pic (info))
10326 {
10327 /* Set the value of ifunc symbols in a non-pie
10328 executable to the glink entry. This is to avoid
10329 text relocations. We can't do this for ifunc in
10330 allocate_dynrelocs, as we do for normal dynamic
10331 function symbols with plt entries, because we need
10332 to keep the original value around for the ifunc
10333 relocation. */
10334 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10335 (output_bfd, htab->glink->output_section));
10336 sym->st_value = (ent->glink_offset
10337 + htab->glink->output_offset
10338 + htab->glink->output_section->vma);
10339 }
10340 doneone = TRUE;
10341 }
10342
10343 if (htab->plt_type == PLT_NEW
10344 || !htab->elf.dynamic_sections_created
10345 || h->dynindx == -1)
10346 {
10347 unsigned char *p;
10348 asection *splt = htab->elf.splt;
10349 if (!htab->elf.dynamic_sections_created
10350 || h->dynindx == -1)
10351 splt = htab->elf.iplt;
10352
10353 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10354
10355 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10356 {
10357 bfd_put_32 (output_bfd, LWZ_11_3, p);
10358 p += 4;
10359 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10360 p += 4;
10361 bfd_put_32 (output_bfd, MR_0_3, p);
10362 p += 4;
10363 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10364 p += 4;
10365 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10366 p += 4;
10367 bfd_put_32 (output_bfd, BEQLR, p);
10368 p += 4;
10369 bfd_put_32 (output_bfd, MR_3_0, p);
10370 p += 4;
10371 bfd_put_32 (output_bfd, NOP, p);
10372 p += 4;
10373 }
10374
10375 write_glink_stub (ent, splt, p, info);
10376
10377 if (!bfd_link_pic (info))
10378 /* We only need one non-PIC glink stub. */
10379 break;
10380 }
10381 else
10382 break;
10383 }
10384
10385 if (h->needs_copy)
10386 {
10387 asection *s;
10388 Elf_Internal_Rela rela;
10389 bfd_byte *loc;
10390
10391 /* This symbols needs a copy reloc. Set it up. */
10392
10393 #ifdef DEBUG
10394 fprintf (stderr, ", copy");
10395 #endif
10396
10397 BFD_ASSERT (h->dynindx != -1);
10398
10399 if (ppc_elf_hash_entry (h)->has_sda_refs)
10400 s = htab->relsbss;
10401 else if (h->root.u.def.section == htab->elf.sdynrelro)
10402 s = htab->elf.sreldynrelro;
10403 else
10404 s = htab->elf.srelbss;
10405 BFD_ASSERT (s != NULL);
10406
10407 rela.r_offset = SYM_VAL (h);
10408 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10409 rela.r_addend = 0;
10410 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10411 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10412 }
10413
10414 #ifdef DEBUG
10415 fprintf (stderr, "\n");
10416 #endif
10417
10418 return TRUE;
10419 }
10420 \f
10421 static enum elf_reloc_type_class
10422 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10423 const asection *rel_sec,
10424 const Elf_Internal_Rela *rela)
10425 {
10426 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10427
10428 if (rel_sec == htab->elf.irelplt)
10429 return reloc_class_ifunc;
10430
10431 switch (ELF32_R_TYPE (rela->r_info))
10432 {
10433 case R_PPC_RELATIVE:
10434 return reloc_class_relative;
10435 case R_PPC_JMP_SLOT:
10436 return reloc_class_plt;
10437 case R_PPC_COPY:
10438 return reloc_class_copy;
10439 default:
10440 return reloc_class_normal;
10441 }
10442 }
10443 \f
10444 /* Finish up the dynamic sections. */
10445
10446 static bfd_boolean
10447 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10448 struct bfd_link_info *info)
10449 {
10450 asection *sdyn;
10451 struct ppc_elf_link_hash_table *htab;
10452 bfd_vma got;
10453 bfd *dynobj;
10454 bfd_boolean ret = TRUE;
10455
10456 #ifdef DEBUG
10457 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10458 #endif
10459
10460 htab = ppc_elf_hash_table (info);
10461 dynobj = htab->elf.dynobj;
10462 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10463
10464 got = 0;
10465 if (htab->elf.hgot != NULL)
10466 got = SYM_VAL (htab->elf.hgot);
10467
10468 if (htab->elf.dynamic_sections_created)
10469 {
10470 Elf32_External_Dyn *dyncon, *dynconend;
10471
10472 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10473
10474 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10475 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10476 for (; dyncon < dynconend; dyncon++)
10477 {
10478 Elf_Internal_Dyn dyn;
10479 asection *s;
10480
10481 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10482
10483 switch (dyn.d_tag)
10484 {
10485 case DT_PLTGOT:
10486 if (htab->is_vxworks)
10487 s = htab->elf.sgotplt;
10488 else
10489 s = htab->elf.splt;
10490 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10491 break;
10492
10493 case DT_PLTRELSZ:
10494 dyn.d_un.d_val = htab->elf.srelplt->size;
10495 break;
10496
10497 case DT_JMPREL:
10498 s = htab->elf.srelplt;
10499 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10500 break;
10501
10502 case DT_PPC_GOT:
10503 dyn.d_un.d_ptr = got;
10504 break;
10505
10506 case DT_TEXTREL:
10507 if (htab->local_ifunc_resolver)
10508 info->callbacks->einfo
10509 (_("%X%P: text relocations and GNU indirect "
10510 "functions will result in a segfault at runtime\n"));
10511 else if (htab->maybe_local_ifunc_resolver)
10512 info->callbacks->einfo
10513 (_("%P: warning: text relocations and GNU indirect "
10514 "functions may result in a segfault at runtime\n"));
10515 continue;
10516
10517 default:
10518 if (htab->is_vxworks
10519 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10520 break;
10521 continue;
10522 }
10523
10524 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10525 }
10526 }
10527
10528 if (htab->elf.sgot != NULL
10529 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10530 {
10531 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10532 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10533 {
10534 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10535
10536 p += htab->elf.hgot->root.u.def.value;
10537 if (htab->plt_type == PLT_OLD)
10538 {
10539 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10540 so that a function can easily find the address of
10541 _GLOBAL_OFFSET_TABLE_. */
10542 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10543 < htab->elf.hgot->root.u.def.section->size);
10544 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10545 }
10546
10547 if (sdyn != NULL)
10548 {
10549 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10550 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10551 < htab->elf.hgot->root.u.def.section->size);
10552 bfd_put_32 (output_bfd, val, p);
10553 }
10554 }
10555 else
10556 {
10557 /* xgettext:c-format */
10558 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10559 htab->elf.hgot->root.root.string,
10560 (htab->elf.sgotplt != NULL
10561 ? htab->elf.sgotplt->name
10562 : htab->elf.sgot->name));
10563 bfd_set_error (bfd_error_bad_value);
10564 ret = FALSE;
10565 }
10566
10567 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10568 }
10569
10570 /* Fill in the first entry in the VxWorks procedure linkage table. */
10571 if (htab->is_vxworks
10572 && htab->elf.splt != NULL
10573 && htab->elf.splt->size != 0
10574 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10575 {
10576 asection *splt = htab->elf.splt;
10577 /* Use the right PLT. */
10578 const bfd_vma *plt_entry = (bfd_link_pic (info)
10579 ? ppc_elf_vxworks_pic_plt0_entry
10580 : ppc_elf_vxworks_plt0_entry);
10581
10582 if (!bfd_link_pic (info))
10583 {
10584 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10585
10586 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10587 splt->contents + 0);
10588 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10589 splt->contents + 4);
10590 }
10591 else
10592 {
10593 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10594 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10595 }
10596 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10597 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10598 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10599 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10600 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10601 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10602
10603 if (! bfd_link_pic (info))
10604 {
10605 Elf_Internal_Rela rela;
10606 bfd_byte *loc;
10607
10608 loc = htab->srelplt2->contents;
10609
10610 /* Output the @ha relocation for the first instruction. */
10611 rela.r_offset = (htab->elf.splt->output_section->vma
10612 + htab->elf.splt->output_offset
10613 + 2);
10614 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10615 rela.r_addend = 0;
10616 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10617 loc += sizeof (Elf32_External_Rela);
10618
10619 /* Output the @l relocation for the second instruction. */
10620 rela.r_offset = (htab->elf.splt->output_section->vma
10621 + htab->elf.splt->output_offset
10622 + 6);
10623 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10624 rela.r_addend = 0;
10625 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10626 loc += sizeof (Elf32_External_Rela);
10627
10628 /* Fix up the remaining relocations. They may have the wrong
10629 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10630 in which symbols were output. */
10631 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10632 {
10633 Elf_Internal_Rela rel;
10634
10635 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10636 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10637 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10638 loc += sizeof (Elf32_External_Rela);
10639
10640 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10641 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10642 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10643 loc += sizeof (Elf32_External_Rela);
10644
10645 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10646 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10647 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10648 loc += sizeof (Elf32_External_Rela);
10649 }
10650 }
10651 }
10652
10653 if (htab->glink != NULL
10654 && htab->glink->contents != NULL
10655 && htab->elf.dynamic_sections_created)
10656 {
10657 unsigned char *p;
10658 unsigned char *endp;
10659 bfd_vma res0;
10660 unsigned int i;
10661
10662 /*
10663 * PIC glink code is the following:
10664 *
10665 * # ith PLT code stub.
10666 * addis 11,30,(plt+(i-1)*4-got)@ha
10667 * lwz 11,(plt+(i-1)*4-got)@l(11)
10668 * mtctr 11
10669 * bctr
10670 *
10671 * # A table of branches, one for each plt entry.
10672 * # The idea is that the plt call stub loads ctr and r11 with these
10673 * # addresses, so (r11 - res_0) gives the plt index * 4.
10674 * res_0: b PLTresolve
10675 * res_1: b PLTresolve
10676 * .
10677 * # Some number of entries towards the end can be nops
10678 * res_n_m3: nop
10679 * res_n_m2: nop
10680 * res_n_m1:
10681 *
10682 * PLTresolve:
10683 * addis 11,11,(1f-res_0)@ha
10684 * mflr 0
10685 * bcl 20,31,1f
10686 * 1: addi 11,11,(1b-res_0)@l
10687 * mflr 12
10688 * mtlr 0
10689 * sub 11,11,12 # r11 = index * 4
10690 * addis 12,12,(got+4-1b)@ha
10691 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10692 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10693 * mtctr 0
10694 * add 0,11,11
10695 * add 11,0,11 # r11 = index * 12 = reloc offset.
10696 * bctr
10697 */
10698 static const unsigned int pic_plt_resolve[] =
10699 {
10700 ADDIS_11_11,
10701 MFLR_0,
10702 BCL_20_31,
10703 ADDI_11_11,
10704 MFLR_12,
10705 MTLR_0,
10706 SUB_11_11_12,
10707 ADDIS_12_12,
10708 LWZ_0_12,
10709 LWZ_12_12,
10710 MTCTR_0,
10711 ADD_0_11_11,
10712 ADD_11_0_11,
10713 BCTR,
10714 NOP,
10715 NOP
10716 };
10717
10718 /*
10719 * Non-PIC glink code is a little simpler.
10720 *
10721 * # ith PLT code stub.
10722 * lis 11,(plt+(i-1)*4)@ha
10723 * lwz 11,(plt+(i-1)*4)@l(11)
10724 * mtctr 11
10725 * bctr
10726 *
10727 * The branch table is the same, then comes
10728 *
10729 * PLTresolve:
10730 * lis 12,(got+4)@ha
10731 * addis 11,11,(-res_0)@ha
10732 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10733 * addi 11,11,(-res_0)@l # r11 = index * 4
10734 * mtctr 0
10735 * add 0,11,11
10736 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10737 * add 11,0,11 # r11 = index * 12 = reloc offset.
10738 * bctr
10739 */
10740 static const unsigned int plt_resolve[] =
10741 {
10742 LIS_12,
10743 ADDIS_11_11,
10744 LWZ_0_12,
10745 ADDI_11_11,
10746 MTCTR_0,
10747 ADD_0_11_11,
10748 LWZ_12_12,
10749 ADD_11_0_11,
10750 BCTR,
10751 NOP,
10752 NOP,
10753 NOP,
10754 NOP,
10755 NOP,
10756 NOP,
10757 NOP
10758 };
10759
10760 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10761 abort ();
10762 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10763 abort ();
10764
10765 /* Build the branch table, one for each plt entry (less one),
10766 and perhaps some padding. */
10767 p = htab->glink->contents;
10768 p += htab->glink_pltresolve;
10769 endp = htab->glink->contents;
10770 endp += htab->glink->size - GLINK_PLTRESOLVE;
10771 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10772 {
10773 bfd_put_32 (output_bfd, B + endp - p, p);
10774 p += 4;
10775 }
10776 while (p < endp)
10777 {
10778 bfd_put_32 (output_bfd, NOP, p);
10779 p += 4;
10780 }
10781
10782 res0 = (htab->glink_pltresolve
10783 + htab->glink->output_section->vma
10784 + htab->glink->output_offset);
10785
10786 if (htab->params->ppc476_workaround)
10787 {
10788 /* Ensure that a call stub at the end of a page doesn't
10789 result in prefetch over the end of the page into the
10790 glink branch table. */
10791 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10792 bfd_vma page_addr;
10793 bfd_vma glink_start = (htab->glink->output_section->vma
10794 + htab->glink->output_offset);
10795
10796 for (page_addr = res0 & -pagesize;
10797 page_addr > glink_start;
10798 page_addr -= pagesize)
10799 {
10800 /* We have a plt call stub that may need fixing. */
10801 bfd_byte *loc;
10802 unsigned int insn;
10803
10804 loc = htab->glink->contents + page_addr - 4 - glink_start;
10805 insn = bfd_get_32 (output_bfd, loc);
10806 if (insn == BCTR)
10807 {
10808 /* By alignment, we know that there must be at least
10809 one other call stub before this one. */
10810 insn = bfd_get_32 (output_bfd, loc - 16);
10811 if (insn == BCTR)
10812 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10813 else
10814 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10815 }
10816 }
10817 }
10818
10819 /* Last comes the PLTresolve stub. */
10820 if (bfd_link_pic (info))
10821 {
10822 bfd_vma bcl;
10823
10824 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10825 {
10826 unsigned int insn = pic_plt_resolve[i];
10827
10828 if (htab->params->ppc476_workaround && insn == NOP)
10829 insn = BA + 0;
10830 bfd_put_32 (output_bfd, insn, p);
10831 p += 4;
10832 }
10833 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10834
10835 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10836 + htab->glink->output_section->vma
10837 + htab->glink->output_offset);
10838
10839 bfd_put_32 (output_bfd,
10840 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10841 bfd_put_32 (output_bfd,
10842 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10843 bfd_put_32 (output_bfd,
10844 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10845 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10846 {
10847 bfd_put_32 (output_bfd,
10848 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10849 bfd_put_32 (output_bfd,
10850 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10851 }
10852 else
10853 {
10854 bfd_put_32 (output_bfd,
10855 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10856 bfd_put_32 (output_bfd,
10857 LWZ_12_12 + 4, p + 9*4);
10858 }
10859 }
10860 else
10861 {
10862 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10863 {
10864 unsigned int insn = plt_resolve[i];
10865
10866 if (htab->params->ppc476_workaround && insn == NOP)
10867 insn = BA + 0;
10868 bfd_put_32 (output_bfd, insn, p);
10869 p += 4;
10870 }
10871 p -= 4 * ARRAY_SIZE (plt_resolve);
10872
10873 bfd_put_32 (output_bfd,
10874 LIS_12 + PPC_HA (got + 4), p + 0*4);
10875 bfd_put_32 (output_bfd,
10876 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10877 bfd_put_32 (output_bfd,
10878 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10879 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10880 {
10881 bfd_put_32 (output_bfd,
10882 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10883 bfd_put_32 (output_bfd,
10884 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10885 }
10886 else
10887 {
10888 bfd_put_32 (output_bfd,
10889 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10890 bfd_put_32 (output_bfd,
10891 LWZ_12_12 + 4, p + 6*4);
10892 }
10893 }
10894 }
10895
10896 if (htab->glink_eh_frame != NULL
10897 && htab->glink_eh_frame->contents != NULL)
10898 {
10899 unsigned char *p = htab->glink_eh_frame->contents;
10900 bfd_vma val;
10901
10902 p += sizeof (glink_eh_frame_cie);
10903 /* FDE length. */
10904 p += 4;
10905 /* CIE pointer. */
10906 p += 4;
10907 /* Offset to .glink. */
10908 val = (htab->glink->output_section->vma
10909 + htab->glink->output_offset);
10910 val -= (htab->glink_eh_frame->output_section->vma
10911 + htab->glink_eh_frame->output_offset);
10912 val -= p - htab->glink_eh_frame->contents;
10913 bfd_put_32 (htab->elf.dynobj, val, p);
10914
10915 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10916 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10917 htab->glink_eh_frame,
10918 htab->glink_eh_frame->contents))
10919 return FALSE;
10920 }
10921
10922 return ret;
10923 }
10924 \f
10925 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10926 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10927 #define TARGET_BIG_SYM powerpc_elf32_vec
10928 #define TARGET_BIG_NAME "elf32-powerpc"
10929 #define ELF_ARCH bfd_arch_powerpc
10930 #define ELF_TARGET_ID PPC32_ELF_DATA
10931 #define ELF_MACHINE_CODE EM_PPC
10932 #ifdef __QNXTARGET__
10933 #define ELF_MAXPAGESIZE 0x1000
10934 #define ELF_COMMONPAGESIZE 0x1000
10935 #else
10936 #define ELF_MAXPAGESIZE 0x10000
10937 #define ELF_COMMONPAGESIZE 0x10000
10938 #endif
10939 #define ELF_MINPAGESIZE 0x1000
10940 #define elf_info_to_howto ppc_elf_info_to_howto
10941
10942 #ifdef EM_CYGNUS_POWERPC
10943 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10944 #endif
10945
10946 #ifdef EM_PPC_OLD
10947 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10948 #endif
10949
10950 #define elf_backend_plt_not_loaded 1
10951 #define elf_backend_want_dynrelro 1
10952 #define elf_backend_can_gc_sections 1
10953 #define elf_backend_can_refcount 1
10954 #define elf_backend_rela_normal 1
10955 #define elf_backend_caches_rawsize 1
10956
10957 #define bfd_elf32_mkobject ppc_elf_mkobject
10958 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10959 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10960 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10961 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10962 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10963 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10964 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10965
10966 #define elf_backend_object_p ppc_elf_object_p
10967 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10968 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10969 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10970 #define elf_backend_relocate_section ppc_elf_relocate_section
10971 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10972 #define elf_backend_check_relocs ppc_elf_check_relocs
10973 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10974 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10975 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10976 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10977 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10978 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10979 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10980 #define elf_backend_fake_sections ppc_elf_fake_sections
10981 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10982 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10983 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10984 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10985 #define elf_backend_write_core_note ppc_elf_write_core_note
10986 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10987 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10988 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10989 #define elf_backend_write_section ppc_elf_write_section
10990 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10991 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10992 #define elf_backend_action_discarded ppc_elf_action_discarded
10993 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10994 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10995
10996 #include "elf32-target.h"
10997
10998 /* FreeBSD Target */
10999
11000 #undef TARGET_LITTLE_SYM
11001 #undef TARGET_LITTLE_NAME
11002
11003 #undef TARGET_BIG_SYM
11004 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11005 #undef TARGET_BIG_NAME
11006 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11007
11008 #undef ELF_OSABI
11009 #define ELF_OSABI ELFOSABI_FREEBSD
11010
11011 #undef elf32_bed
11012 #define elf32_bed elf32_powerpc_fbsd_bed
11013
11014 #include "elf32-target.h"
11015
11016 /* VxWorks Target */
11017
11018 #undef TARGET_LITTLE_SYM
11019 #undef TARGET_LITTLE_NAME
11020
11021 #undef TARGET_BIG_SYM
11022 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11023 #undef TARGET_BIG_NAME
11024 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11025
11026 #undef ELF_OSABI
11027
11028 /* VxWorks uses the elf default section flags for .plt. */
11029 static const struct bfd_elf_special_section *
11030 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11031 {
11032 if (sec->name == NULL)
11033 return NULL;
11034
11035 if (strcmp (sec->name, ".plt") == 0)
11036 return _bfd_elf_get_sec_type_attr (abfd, sec);
11037
11038 return ppc_elf_get_sec_type_attr (abfd, sec);
11039 }
11040
11041 /* Like ppc_elf_link_hash_table_create, but overrides
11042 appropriately for VxWorks. */
11043 static struct bfd_link_hash_table *
11044 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11045 {
11046 struct bfd_link_hash_table *ret;
11047
11048 ret = ppc_elf_link_hash_table_create (abfd);
11049 if (ret)
11050 {
11051 struct ppc_elf_link_hash_table *htab
11052 = (struct ppc_elf_link_hash_table *)ret;
11053 htab->is_vxworks = 1;
11054 htab->plt_type = PLT_VXWORKS;
11055 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11056 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11057 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11058 }
11059 return ret;
11060 }
11061
11062 /* Tweak magic VxWorks symbols as they are loaded. */
11063 static bfd_boolean
11064 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11065 struct bfd_link_info *info,
11066 Elf_Internal_Sym *sym,
11067 const char **namep,
11068 flagword *flagsp,
11069 asection **secp,
11070 bfd_vma *valp)
11071 {
11072 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11073 valp))
11074 return FALSE;
11075
11076 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11077 }
11078
11079 static void
11080 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11081 {
11082 ppc_elf_final_write_processing (abfd, linker);
11083 elf_vxworks_final_write_processing (abfd, linker);
11084 }
11085
11086 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11087 define it. */
11088 #undef elf_backend_want_plt_sym
11089 #define elf_backend_want_plt_sym 1
11090 #undef elf_backend_want_got_plt
11091 #define elf_backend_want_got_plt 1
11092 #undef elf_backend_got_symbol_offset
11093 #define elf_backend_got_symbol_offset 0
11094 #undef elf_backend_plt_not_loaded
11095 #define elf_backend_plt_not_loaded 0
11096 #undef elf_backend_plt_readonly
11097 #define elf_backend_plt_readonly 1
11098 #undef elf_backend_got_header_size
11099 #define elf_backend_got_header_size 12
11100 #undef elf_backend_dtrel_excludes_plt
11101 #define elf_backend_dtrel_excludes_plt 1
11102
11103 #undef bfd_elf32_get_synthetic_symtab
11104
11105 #undef bfd_elf32_bfd_link_hash_table_create
11106 #define bfd_elf32_bfd_link_hash_table_create \
11107 ppc_elf_vxworks_link_hash_table_create
11108 #undef elf_backend_add_symbol_hook
11109 #define elf_backend_add_symbol_hook \
11110 ppc_elf_vxworks_add_symbol_hook
11111 #undef elf_backend_link_output_symbol_hook
11112 #define elf_backend_link_output_symbol_hook \
11113 elf_vxworks_link_output_symbol_hook
11114 #undef elf_backend_final_write_processing
11115 #define elf_backend_final_write_processing \
11116 ppc_elf_vxworks_final_write_processing
11117 #undef elf_backend_get_sec_type_attr
11118 #define elf_backend_get_sec_type_attr \
11119 ppc_elf_vxworks_get_sec_type_attr
11120 #undef elf_backend_emit_relocs
11121 #define elf_backend_emit_relocs \
11122 elf_vxworks_emit_relocs
11123
11124 #undef elf32_bed
11125 #define elf32_bed ppc_elf_vxworks_bed
11126 #undef elf_backend_post_process_headers
11127
11128 #include "elf32-target.h"