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Set DF_STATIC_TLS for PIEs
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2014 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831 \f
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 /* Initialize howto table if not already done. */
2023 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2024 ppc_elf_howto_init ();
2025
2026 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2027 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2028
2029 /* Just because the above assert didn't trigger doesn't mean that
2030 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2031 if (!cache_ptr->howto)
2032 {
2033 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2034 abfd, ELF32_R_TYPE (dst->r_info));
2035 bfd_set_error (bfd_error_bad_value);
2036
2037 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2038 }
2039 }
2040
2041 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2042
2043 static bfd_reloc_status_type
2044 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2045 arelent *reloc_entry,
2046 asymbol *symbol,
2047 void *data ATTRIBUTE_UNUSED,
2048 asection *input_section,
2049 bfd *output_bfd,
2050 char **error_message ATTRIBUTE_UNUSED)
2051 {
2052 bfd_vma relocation;
2053
2054 if (output_bfd != NULL)
2055 {
2056 reloc_entry->address += input_section->output_offset;
2057 return bfd_reloc_ok;
2058 }
2059
2060 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2061 return bfd_reloc_outofrange;
2062
2063 if (bfd_is_com_section (symbol->section))
2064 relocation = 0;
2065 else
2066 relocation = symbol->value;
2067
2068 relocation += symbol->section->output_section->vma;
2069 relocation += symbol->section->output_offset;
2070 relocation += reloc_entry->addend;
2071 if (reloc_entry->howto->pc_relative)
2072 relocation -= reloc_entry->address;
2073
2074 reloc_entry->addend += (relocation & 0x8000) << 1;
2075
2076 return bfd_reloc_continue;
2077 }
2078
2079 static bfd_reloc_status_type
2080 ppc_elf_unhandled_reloc (bfd *abfd,
2081 arelent *reloc_entry,
2082 asymbol *symbol,
2083 void *data,
2084 asection *input_section,
2085 bfd *output_bfd,
2086 char **error_message)
2087 {
2088 /* If this is a relocatable link (output_bfd test tells us), just
2089 call the generic function. Any adjustment will be done at final
2090 link time. */
2091 if (output_bfd != NULL)
2092 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2093 input_section, output_bfd, error_message);
2094
2095 if (error_message != NULL)
2096 {
2097 static char buf[60];
2098 sprintf (buf, _("generic linker can't handle %s"),
2099 reloc_entry->howto->name);
2100 *error_message = buf;
2101 }
2102 return bfd_reloc_dangerous;
2103 }
2104 \f
2105 /* Sections created by the linker. */
2106
2107 typedef struct elf_linker_section
2108 {
2109 /* Pointer to the bfd section. */
2110 asection *section;
2111 /* Section name. */
2112 const char *name;
2113 /* Associated bss section name. */
2114 const char *bss_name;
2115 /* Associated symbol name. */
2116 const char *sym_name;
2117 /* Associated symbol. */
2118 struct elf_link_hash_entry *sym;
2119 } elf_linker_section_t;
2120
2121 /* Linked list of allocated pointer entries. This hangs off of the
2122 symbol lists, and provides allows us to return different pointers,
2123 based on different addend's. */
2124
2125 typedef struct elf_linker_section_pointers
2126 {
2127 /* next allocated pointer for this symbol */
2128 struct elf_linker_section_pointers *next;
2129 /* offset of pointer from beginning of section */
2130 bfd_vma offset;
2131 /* addend used */
2132 bfd_vma addend;
2133 /* which linker section this is */
2134 elf_linker_section_t *lsect;
2135 } elf_linker_section_pointers_t;
2136
2137 struct ppc_elf_obj_tdata
2138 {
2139 struct elf_obj_tdata elf;
2140
2141 /* A mapping from local symbols to offsets into the various linker
2142 sections added. This is index by the symbol index. */
2143 elf_linker_section_pointers_t **linker_section_pointers;
2144
2145 /* Flags used to auto-detect plt type. */
2146 unsigned int makes_plt_call : 1;
2147 unsigned int has_rel16 : 1;
2148 };
2149
2150 #define ppc_elf_tdata(bfd) \
2151 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2152
2153 #define elf_local_ptr_offsets(bfd) \
2154 (ppc_elf_tdata (bfd)->linker_section_pointers)
2155
2156 #define is_ppc_elf(bfd) \
2157 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2158 && elf_object_id (bfd) == PPC32_ELF_DATA)
2159
2160 /* Override the generic function because we store some extras. */
2161
2162 static bfd_boolean
2163 ppc_elf_mkobject (bfd *abfd)
2164 {
2165 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2166 PPC32_ELF_DATA);
2167 }
2168
2169 /* Fix bad default arch selected for a 32 bit input bfd when the
2170 default is 64 bit. */
2171
2172 static bfd_boolean
2173 ppc_elf_object_p (bfd *abfd)
2174 {
2175 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2176 {
2177 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2178
2179 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2180 {
2181 /* Relies on arch after 64 bit default being 32 bit default. */
2182 abfd->arch_info = abfd->arch_info->next;
2183 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2184 }
2185 }
2186 return TRUE;
2187 }
2188
2189 /* Function to set whether a module needs the -mrelocatable bit set. */
2190
2191 static bfd_boolean
2192 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2193 {
2194 BFD_ASSERT (!elf_flags_init (abfd)
2195 || elf_elfheader (abfd)->e_flags == flags);
2196
2197 elf_elfheader (abfd)->e_flags = flags;
2198 elf_flags_init (abfd) = TRUE;
2199 return TRUE;
2200 }
2201
2202 /* Support for core dump NOTE sections. */
2203
2204 static bfd_boolean
2205 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2206 {
2207 int offset;
2208 unsigned int size;
2209
2210 switch (note->descsz)
2211 {
2212 default:
2213 return FALSE;
2214
2215 case 268: /* Linux/PPC. */
2216 /* pr_cursig */
2217 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2218
2219 /* pr_pid */
2220 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2221
2222 /* pr_reg */
2223 offset = 72;
2224 size = 192;
2225
2226 break;
2227 }
2228
2229 /* Make a ".reg/999" section. */
2230 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2231 size, note->descpos + offset);
2232 }
2233
2234 static bfd_boolean
2235 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2236 {
2237 switch (note->descsz)
2238 {
2239 default:
2240 return FALSE;
2241
2242 case 128: /* Linux/PPC elf_prpsinfo. */
2243 elf_tdata (abfd)->core->pid
2244 = bfd_get_32 (abfd, note->descdata + 16);
2245 elf_tdata (abfd)->core->program
2246 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2247 elf_tdata (abfd)->core->command
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2249 }
2250
2251 /* Note that for some reason, a spurious space is tacked
2252 onto the end of the args in some (at least one anyway)
2253 implementations, so strip it off if it exists. */
2254
2255 {
2256 char *command = elf_tdata (abfd)->core->command;
2257 int n = strlen (command);
2258
2259 if (0 < n && command[n - 1] == ' ')
2260 command[n - 1] = '\0';
2261 }
2262
2263 return TRUE;
2264 }
2265
2266 char *
2267 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2268 const struct elf_internal_linux_prpsinfo *prpsinfo)
2269 {
2270 struct elf_external_ppc_linux_prpsinfo32 data;
2271
2272 memset (&data, 0, sizeof (data));
2273 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2274
2275 return elfcore_write_note (abfd, buf, bufsiz,
2276 "CORE", NT_PRPSINFO, &data, sizeof (data));
2277 }
2278
2279 static char *
2280 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2281 {
2282 switch (note_type)
2283 {
2284 default:
2285 return NULL;
2286
2287 case NT_PRPSINFO:
2288 {
2289 char data[128];
2290 va_list ap;
2291
2292 va_start (ap, note_type);
2293 memset (data, 0, sizeof (data));
2294 strncpy (data + 32, va_arg (ap, const char *), 16);
2295 strncpy (data + 48, va_arg (ap, const char *), 80);
2296 va_end (ap);
2297 return elfcore_write_note (abfd, buf, bufsiz,
2298 "CORE", note_type, data, sizeof (data));
2299 }
2300
2301 case NT_PRSTATUS:
2302 {
2303 char data[268];
2304 va_list ap;
2305 long pid;
2306 int cursig;
2307 const void *greg;
2308
2309 va_start (ap, note_type);
2310 memset (data, 0, 72);
2311 pid = va_arg (ap, long);
2312 bfd_put_32 (abfd, pid, data + 24);
2313 cursig = va_arg (ap, int);
2314 bfd_put_16 (abfd, cursig, data + 12);
2315 greg = va_arg (ap, const void *);
2316 memcpy (data + 72, greg, 192);
2317 memset (data + 264, 0, 4);
2318 va_end (ap);
2319 return elfcore_write_note (abfd, buf, bufsiz,
2320 "CORE", note_type, data, sizeof (data));
2321 }
2322 }
2323 }
2324
2325 static flagword
2326 ppc_elf_lookup_section_flags (char *flag_name)
2327 {
2328
2329 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2330 return SHF_PPC_VLE;
2331
2332 return 0;
2333 }
2334
2335 /* Add the VLE flag if required. */
2336
2337 bfd_boolean
2338 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2339 {
2340 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2341 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2342 shdr->sh_flags |= SHF_PPC_VLE;
2343
2344 return TRUE;
2345 }
2346
2347 /* Return address for Ith PLT stub in section PLT, for relocation REL
2348 or (bfd_vma) -1 if it should not be included. */
2349
2350 static bfd_vma
2351 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2352 const asection *plt ATTRIBUTE_UNUSED,
2353 const arelent *rel)
2354 {
2355 return rel->address;
2356 }
2357
2358 /* Handle a PowerPC specific section when reading an object file. This
2359 is called when bfd_section_from_shdr finds a section with an unknown
2360 type. */
2361
2362 static bfd_boolean
2363 ppc_elf_section_from_shdr (bfd *abfd,
2364 Elf_Internal_Shdr *hdr,
2365 const char *name,
2366 int shindex)
2367 {
2368 asection *newsect;
2369 flagword flags;
2370
2371 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2372 return FALSE;
2373
2374 newsect = hdr->bfd_section;
2375 flags = bfd_get_section_flags (abfd, newsect);
2376 if (hdr->sh_flags & SHF_EXCLUDE)
2377 flags |= SEC_EXCLUDE;
2378
2379 if (hdr->sh_type == SHT_ORDERED)
2380 flags |= SEC_SORT_ENTRIES;
2381
2382 bfd_set_section_flags (abfd, newsect, flags);
2383 return TRUE;
2384 }
2385
2386 /* Set up any other section flags and such that may be necessary. */
2387
2388 static bfd_boolean
2389 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2390 Elf_Internal_Shdr *shdr,
2391 asection *asect)
2392 {
2393 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2394 shdr->sh_type = SHT_ORDERED;
2395
2396 return TRUE;
2397 }
2398
2399 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2400 need to bump up the number of section headers. */
2401
2402 static int
2403 ppc_elf_additional_program_headers (bfd *abfd,
2404 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2405 {
2406 asection *s;
2407 int ret = 0;
2408
2409 s = bfd_get_section_by_name (abfd, ".sbss2");
2410 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2411 ++ret;
2412
2413 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2414 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2415 ++ret;
2416
2417 return ret;
2418 }
2419
2420 /* Modify the segment map for VLE executables. */
2421
2422 bfd_boolean
2423 ppc_elf_modify_segment_map (bfd *abfd,
2424 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2425 {
2426 struct elf_segment_map *m, *n;
2427 bfd_size_type amt;
2428 unsigned int j, k;
2429 bfd_boolean sect0_vle, sectj_vle;
2430
2431 /* At this point in the link, output sections have already been sorted by
2432 LMA and assigned to segments. All that is left to do is to ensure
2433 there is no mixing of VLE & non-VLE sections in a text segment.
2434 If we find that case, we split the segment.
2435 We maintain the original output section order. */
2436
2437 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2438 {
2439 if (m->count == 0)
2440 continue;
2441
2442 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2443 for (j = 1; j < m->count; ++j)
2444 {
2445 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2446
2447 if (sectj_vle != sect0_vle)
2448 break;
2449 }
2450 if (j >= m->count)
2451 continue;
2452
2453 /* sections 0..j-1 stay in this (current) segment,
2454 the remainder are put in a new segment.
2455 The scan resumes with the new segment. */
2456
2457 /* Fix the new segment. */
2458 amt = sizeof (struct elf_segment_map);
2459 amt += (m->count - j - 1) * sizeof (asection *);
2460 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2461 if (n == NULL)
2462 return FALSE;
2463
2464 n->p_type = PT_LOAD;
2465 n->p_flags = PF_X | PF_R;
2466 if (sectj_vle)
2467 n->p_flags |= PF_PPC_VLE;
2468 n->count = m->count - j;
2469 for (k = 0; k < n->count; ++k)
2470 {
2471 n->sections[k] = m->sections[j+k];
2472 m->sections[j+k] = NULL;
2473 }
2474 n->next = m->next;
2475 m->next = n;
2476
2477 /* Fix the current segment */
2478 m->count = j;
2479 }
2480
2481 return TRUE;
2482 }
2483
2484 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2485 .PPC.EMB.sbss0 a normal section, and not a bss section so
2486 that the linker doesn't crater when trying to make more than
2487 2 sections. */
2488
2489 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2490 {
2491 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2492 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2493 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2494 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2497 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2498 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2500 { NULL, 0, 0, 0, 0 }
2501 };
2502
2503 /* This is what we want for new plt/got. */
2504 static struct bfd_elf_special_section ppc_alt_plt =
2505 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2506
2507 static const struct bfd_elf_special_section *
2508 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2509 {
2510 const struct bfd_elf_special_section *ssect;
2511
2512 /* See if this is one of the special sections. */
2513 if (sec->name == NULL)
2514 return NULL;
2515
2516 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2517 sec->use_rela_p);
2518 if (ssect != NULL)
2519 {
2520 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2521 ssect = &ppc_alt_plt;
2522 return ssect;
2523 }
2524
2525 return _bfd_elf_get_sec_type_attr (abfd, sec);
2526 }
2527 \f
2528 /* Very simple linked list structure for recording apuinfo values. */
2529 typedef struct apuinfo_list
2530 {
2531 struct apuinfo_list *next;
2532 unsigned long value;
2533 }
2534 apuinfo_list;
2535
2536 static apuinfo_list *head;
2537 static bfd_boolean apuinfo_set;
2538
2539 static void
2540 apuinfo_list_init (void)
2541 {
2542 head = NULL;
2543 apuinfo_set = FALSE;
2544 }
2545
2546 static void
2547 apuinfo_list_add (unsigned long value)
2548 {
2549 apuinfo_list *entry = head;
2550
2551 while (entry != NULL)
2552 {
2553 if (entry->value == value)
2554 return;
2555 entry = entry->next;
2556 }
2557
2558 entry = bfd_malloc (sizeof (* entry));
2559 if (entry == NULL)
2560 return;
2561
2562 entry->value = value;
2563 entry->next = head;
2564 head = entry;
2565 }
2566
2567 static unsigned
2568 apuinfo_list_length (void)
2569 {
2570 apuinfo_list *entry;
2571 unsigned long count;
2572
2573 for (entry = head, count = 0;
2574 entry;
2575 entry = entry->next)
2576 ++ count;
2577
2578 return count;
2579 }
2580
2581 static inline unsigned long
2582 apuinfo_list_element (unsigned long number)
2583 {
2584 apuinfo_list * entry;
2585
2586 for (entry = head;
2587 entry && number --;
2588 entry = entry->next)
2589 ;
2590
2591 return entry ? entry->value : 0;
2592 }
2593
2594 static void
2595 apuinfo_list_finish (void)
2596 {
2597 apuinfo_list *entry;
2598
2599 for (entry = head; entry;)
2600 {
2601 apuinfo_list *next = entry->next;
2602 free (entry);
2603 entry = next;
2604 }
2605
2606 head = NULL;
2607 }
2608
2609 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2610 #define APUINFO_LABEL "APUinfo"
2611
2612 /* Scan the input BFDs and create a linked list of
2613 the APUinfo values that will need to be emitted. */
2614
2615 static void
2616 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2617 {
2618 bfd *ibfd;
2619 asection *asec;
2620 char *buffer = NULL;
2621 bfd_size_type largest_input_size = 0;
2622 unsigned i;
2623 unsigned long length;
2624 const char *error_message = NULL;
2625
2626 if (link_info == NULL)
2627 return;
2628
2629 apuinfo_list_init ();
2630
2631 /* Read in the input sections contents. */
2632 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2633 {
2634 unsigned long datum;
2635
2636 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2637 if (asec == NULL)
2638 continue;
2639
2640 error_message = _("corrupt %s section in %B");
2641 length = asec->size;
2642 if (length < 20)
2643 goto fail;
2644
2645 apuinfo_set = TRUE;
2646 if (largest_input_size < asec->size)
2647 {
2648 if (buffer)
2649 free (buffer);
2650 largest_input_size = asec->size;
2651 buffer = bfd_malloc (largest_input_size);
2652 if (!buffer)
2653 return;
2654 }
2655
2656 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2657 || (bfd_bread (buffer, length, ibfd) != length))
2658 {
2659 error_message = _("unable to read in %s section from %B");
2660 goto fail;
2661 }
2662
2663 /* Verify the contents of the header. Note - we have to
2664 extract the values this way in order to allow for a
2665 host whose endian-ness is different from the target. */
2666 datum = bfd_get_32 (ibfd, buffer);
2667 if (datum != sizeof APUINFO_LABEL)
2668 goto fail;
2669
2670 datum = bfd_get_32 (ibfd, buffer + 8);
2671 if (datum != 0x2)
2672 goto fail;
2673
2674 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2675 goto fail;
2676
2677 /* Get the number of bytes used for apuinfo entries. */
2678 datum = bfd_get_32 (ibfd, buffer + 4);
2679 if (datum + 20 != length)
2680 goto fail;
2681
2682 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2683 for (i = 0; i < datum; i += 4)
2684 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2685 }
2686
2687 error_message = NULL;
2688
2689 if (apuinfo_set)
2690 {
2691 /* Compute the size of the output section. */
2692 unsigned num_entries = apuinfo_list_length ();
2693
2694 /* Set the output section size, if it exists. */
2695 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2696
2697 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2698 {
2699 ibfd = abfd;
2700 error_message = _("warning: unable to set size of %s section in %B");
2701 }
2702 }
2703
2704 fail:
2705 if (buffer)
2706 free (buffer);
2707
2708 if (error_message)
2709 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2710 }
2711
2712 /* Prevent the output section from accumulating the input sections'
2713 contents. We have already stored this in our linked list structure. */
2714
2715 static bfd_boolean
2716 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2717 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2718 asection *asec,
2719 bfd_byte *contents ATTRIBUTE_UNUSED)
2720 {
2721 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2722 }
2723
2724 /* Finally we can generate the output section. */
2725
2726 static void
2727 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2728 {
2729 bfd_byte *buffer;
2730 asection *asec;
2731 unsigned i;
2732 unsigned num_entries;
2733 bfd_size_type length;
2734
2735 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2736 if (asec == NULL)
2737 return;
2738
2739 if (!apuinfo_set)
2740 return;
2741
2742 length = asec->size;
2743 if (length < 20)
2744 return;
2745
2746 buffer = bfd_malloc (length);
2747 if (buffer == NULL)
2748 {
2749 (*_bfd_error_handler)
2750 (_("failed to allocate space for new APUinfo section."));
2751 return;
2752 }
2753
2754 /* Create the apuinfo header. */
2755 num_entries = apuinfo_list_length ();
2756 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2757 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2758 bfd_put_32 (abfd, 0x2, buffer + 8);
2759 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2760
2761 length = 20;
2762 for (i = 0; i < num_entries; i++)
2763 {
2764 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2765 length += 4;
2766 }
2767
2768 if (length != asec->size)
2769 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2770
2771 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2772 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2773
2774 free (buffer);
2775
2776 apuinfo_list_finish ();
2777 }
2778 \f
2779 static bfd_boolean
2780 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2781 {
2782 bfd_byte buf[GLINK_ENTRY_SIZE];
2783
2784 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2785 return FALSE;
2786
2787 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2788 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2789 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2790 && bfd_get_32 (abfd, buf + 12) == BCTR);
2791 }
2792
2793 static bfd_boolean
2794 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2795 {
2796 bfd_vma vma = *(bfd_vma *) ptr;
2797 return ((section->flags & SEC_ALLOC) != 0
2798 && section->vma <= vma
2799 && vma < section->vma + section->size);
2800 }
2801
2802 static long
2803 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2804 long dynsymcount, asymbol **dynsyms,
2805 asymbol **ret)
2806 {
2807 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2808 asection *plt, *relplt, *dynamic, *glink;
2809 bfd_vma glink_vma = 0;
2810 bfd_vma resolv_vma = 0;
2811 bfd_vma stub_vma;
2812 asymbol *s;
2813 arelent *p;
2814 long count, i;
2815 size_t size;
2816 char *names;
2817 bfd_byte buf[4];
2818
2819 *ret = NULL;
2820
2821 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2822 return 0;
2823
2824 if (dynsymcount <= 0)
2825 return 0;
2826
2827 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2828 if (relplt == NULL)
2829 return 0;
2830
2831 plt = bfd_get_section_by_name (abfd, ".plt");
2832 if (plt == NULL)
2833 return 0;
2834
2835 /* Call common code to handle old-style executable PLTs. */
2836 if (elf_section_flags (plt) & SHF_EXECINSTR)
2837 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2838 dynsymcount, dynsyms, ret);
2839
2840 /* If this object was prelinked, the prelinker stored the address
2841 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2842 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2843 if (dynamic != NULL)
2844 {
2845 bfd_byte *dynbuf, *extdyn, *extdynend;
2846 size_t extdynsize;
2847 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2848
2849 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2850 return -1;
2851
2852 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2853 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2854
2855 extdyn = dynbuf;
2856 extdynend = extdyn + dynamic->size;
2857 for (; extdyn < extdynend; extdyn += extdynsize)
2858 {
2859 Elf_Internal_Dyn dyn;
2860 (*swap_dyn_in) (abfd, extdyn, &dyn);
2861
2862 if (dyn.d_tag == DT_NULL)
2863 break;
2864
2865 if (dyn.d_tag == DT_PPC_GOT)
2866 {
2867 unsigned int g_o_t = dyn.d_un.d_val;
2868 asection *got = bfd_get_section_by_name (abfd, ".got");
2869 if (got != NULL
2870 && bfd_get_section_contents (abfd, got, buf,
2871 g_o_t - got->vma + 4, 4))
2872 glink_vma = bfd_get_32 (abfd, buf);
2873 break;
2874 }
2875 }
2876 free (dynbuf);
2877 }
2878
2879 /* Otherwise we read the first plt entry. */
2880 if (glink_vma == 0)
2881 {
2882 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2883 glink_vma = bfd_get_32 (abfd, buf);
2884 }
2885
2886 if (glink_vma == 0)
2887 return 0;
2888
2889 /* The .glink section usually does not survive the final
2890 link; search for the section (usually .text) where the
2891 glink stubs now reside. */
2892 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2893 if (glink == NULL)
2894 return 0;
2895
2896 /* Determine glink PLT resolver by reading the relative branch
2897 from the first glink stub. */
2898 if (bfd_get_section_contents (abfd, glink, buf,
2899 glink_vma - glink->vma, 4))
2900 {
2901 unsigned int insn = bfd_get_32 (abfd, buf);
2902
2903 /* The first glink stub may either branch to the resolver ... */
2904 insn ^= B;
2905 if ((insn & ~0x3fffffc) == 0)
2906 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2907
2908 /* ... or fall through a bunch of NOPs. */
2909 else if ((insn ^ B ^ NOP) == 0)
2910 for (i = 4;
2911 bfd_get_section_contents (abfd, glink, buf,
2912 glink_vma - glink->vma + i, 4);
2913 i += 4)
2914 if (bfd_get_32 (abfd, buf) != NOP)
2915 {
2916 resolv_vma = glink_vma + i;
2917 break;
2918 }
2919 }
2920
2921 count = relplt->size / sizeof (Elf32_External_Rela);
2922 stub_vma = glink_vma - (bfd_vma) count * 16;
2923 /* If the stubs are those for -shared/-pie then we might have
2924 multiple stubs for each plt entry. If that is the case then
2925 there is no way to associate stubs with their plt entries short
2926 of figuring out the GOT pointer value used in the stub. */
2927 if (!is_nonpic_glink_stub (abfd, glink,
2928 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2929 return 0;
2930
2931 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2932 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2933 return -1;
2934
2935 size = count * sizeof (asymbol);
2936 p = relplt->relocation;
2937 for (i = 0; i < count; i++, p++)
2938 {
2939 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2940 if (p->addend != 0)
2941 size += sizeof ("+0x") - 1 + 8;
2942 }
2943
2944 size += sizeof (asymbol) + sizeof ("__glink");
2945
2946 if (resolv_vma)
2947 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2948
2949 s = *ret = bfd_malloc (size);
2950 if (s == NULL)
2951 return -1;
2952
2953 names = (char *) (s + count + 1 + (resolv_vma != 0));
2954 p = relplt->relocation;
2955 for (i = 0; i < count; i++, p++)
2956 {
2957 size_t len;
2958
2959 *s = **p->sym_ptr_ptr;
2960 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2961 we are defining a symbol, ensure one of them is set. */
2962 if ((s->flags & BSF_LOCAL) == 0)
2963 s->flags |= BSF_GLOBAL;
2964 s->flags |= BSF_SYNTHETIC;
2965 s->section = glink;
2966 s->value = stub_vma - glink->vma;
2967 s->name = names;
2968 s->udata.p = NULL;
2969 len = strlen ((*p->sym_ptr_ptr)->name);
2970 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2971 names += len;
2972 if (p->addend != 0)
2973 {
2974 memcpy (names, "+0x", sizeof ("+0x") - 1);
2975 names += sizeof ("+0x") - 1;
2976 bfd_sprintf_vma (abfd, names, p->addend);
2977 names += strlen (names);
2978 }
2979 memcpy (names, "@plt", sizeof ("@plt"));
2980 names += sizeof ("@plt");
2981 ++s;
2982 stub_vma += 16;
2983 }
2984
2985 /* Add a symbol at the start of the glink branch table. */
2986 memset (s, 0, sizeof *s);
2987 s->the_bfd = abfd;
2988 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2989 s->section = glink;
2990 s->value = glink_vma - glink->vma;
2991 s->name = names;
2992 memcpy (names, "__glink", sizeof ("__glink"));
2993 names += sizeof ("__glink");
2994 s++;
2995 count++;
2996
2997 if (resolv_vma)
2998 {
2999 /* Add a symbol for the glink PLT resolver. */
3000 memset (s, 0, sizeof *s);
3001 s->the_bfd = abfd;
3002 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3003 s->section = glink;
3004 s->value = resolv_vma - glink->vma;
3005 s->name = names;
3006 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3007 names += sizeof ("__glink_PLTresolve");
3008 s++;
3009 count++;
3010 }
3011
3012 return count;
3013 }
3014 \f
3015 /* The following functions are specific to the ELF linker, while
3016 functions above are used generally. They appear in this file more
3017 or less in the order in which they are called. eg.
3018 ppc_elf_check_relocs is called early in the link process,
3019 ppc_elf_finish_dynamic_sections is one of the last functions
3020 called. */
3021
3022 /* Track PLT entries needed for a given symbol. We might need more
3023 than one glink entry per symbol when generating a pic binary. */
3024 struct plt_entry
3025 {
3026 struct plt_entry *next;
3027
3028 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3029 This field stores the offset into .got2 used to initialise the
3030 GOT pointer reg. It will always be at least 32768. (Current
3031 gcc always uses an offset of 32768, but ld -r will pack .got2
3032 sections together resulting in larger offsets). */
3033 bfd_vma addend;
3034
3035 /* The .got2 section. */
3036 asection *sec;
3037
3038 /* PLT refcount or offset. */
3039 union
3040 {
3041 bfd_signed_vma refcount;
3042 bfd_vma offset;
3043 } plt;
3044
3045 /* .glink stub offset. */
3046 bfd_vma glink_offset;
3047 };
3048
3049 /* Of those relocs that might be copied as dynamic relocs, this function
3050 selects those that must be copied when linking a shared library,
3051 even when the symbol is local. */
3052
3053 static int
3054 must_be_dyn_reloc (struct bfd_link_info *info,
3055 enum elf_ppc_reloc_type r_type)
3056 {
3057 switch (r_type)
3058 {
3059 default:
3060 return 1;
3061
3062 case R_PPC_REL24:
3063 case R_PPC_REL14:
3064 case R_PPC_REL14_BRTAKEN:
3065 case R_PPC_REL14_BRNTAKEN:
3066 case R_PPC_REL32:
3067 return 0;
3068
3069 case R_PPC_TPREL32:
3070 case R_PPC_TPREL16:
3071 case R_PPC_TPREL16_LO:
3072 case R_PPC_TPREL16_HI:
3073 case R_PPC_TPREL16_HA:
3074 return !info->executable;
3075 }
3076 }
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. */
3082 #define ELIMINATE_COPY_RELOCS 1
3083
3084 /* Used to track dynamic relocations for local symbols. */
3085 struct ppc_dyn_relocs
3086 {
3087 struct ppc_dyn_relocs *next;
3088
3089 /* The input section of the reloc. */
3090 asection *sec;
3091
3092 /* Total number of relocs copied for the input section. */
3093 unsigned int count : 31;
3094
3095 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3096 unsigned int ifunc : 1;
3097 };
3098
3099 /* PPC ELF linker hash entry. */
3100
3101 struct ppc_elf_link_hash_entry
3102 {
3103 struct elf_link_hash_entry elf;
3104
3105 /* If this symbol is used in the linker created sections, the processor
3106 specific backend uses this field to map the field into the offset
3107 from the beginning of the section. */
3108 elf_linker_section_pointers_t *linker_section_pointer;
3109
3110 /* Track dynamic relocs copied for this symbol. */
3111 struct elf_dyn_relocs *dyn_relocs;
3112
3113 /* Contexts in which symbol is used in the GOT (or TOC).
3114 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3115 corresponding relocs are encountered during check_relocs.
3116 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3117 indicate the corresponding GOT entry type is not needed. */
3118 #define TLS_GD 1 /* GD reloc. */
3119 #define TLS_LD 2 /* LD reloc. */
3120 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3121 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3122 #define TLS_TLS 16 /* Any TLS reloc. */
3123 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3124 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3125 char tls_mask;
3126
3127 /* Nonzero if we have seen a small data relocation referring to this
3128 symbol. */
3129 unsigned char has_sda_refs;
3130 };
3131
3132 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3133
3134 /* PPC ELF linker hash table. */
3135
3136 struct ppc_elf_link_hash_table
3137 {
3138 struct elf_link_hash_table elf;
3139
3140 /* Various options passed from the linker. */
3141 struct ppc_elf_params *params;
3142
3143 /* Short-cuts to get to dynamic linker sections. */
3144 asection *got;
3145 asection *relgot;
3146 asection *glink;
3147 asection *plt;
3148 asection *relplt;
3149 asection *iplt;
3150 asection *reliplt;
3151 asection *dynbss;
3152 asection *relbss;
3153 asection *dynsbss;
3154 asection *relsbss;
3155 elf_linker_section_t sdata[2];
3156 asection *sbss;
3157 asection *glink_eh_frame;
3158
3159 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3160 asection *srelplt2;
3161
3162 /* The .got.plt section (VxWorks only)*/
3163 asection *sgotplt;
3164
3165 /* Shortcut to __tls_get_addr. */
3166 struct elf_link_hash_entry *tls_get_addr;
3167
3168 /* The bfd that forced an old-style PLT. */
3169 bfd *old_bfd;
3170
3171 /* TLS local dynamic got entry handling. */
3172 union {
3173 bfd_signed_vma refcount;
3174 bfd_vma offset;
3175 } tlsld_got;
3176
3177 /* Offset of branch table to PltResolve function in glink. */
3178 bfd_vma glink_pltresolve;
3179
3180 /* Size of reserved GOT entries. */
3181 unsigned int got_header_size;
3182 /* Non-zero if allocating the header left a gap. */
3183 unsigned int got_gap;
3184
3185 /* The type of PLT we have chosen to use. */
3186 enum ppc_elf_plt_type plt_type;
3187
3188 /* True if the target system is VxWorks. */
3189 unsigned int is_vxworks:1;
3190
3191 /* The size of PLT entries. */
3192 int plt_entry_size;
3193 /* The distance between adjacent PLT slots. */
3194 int plt_slot_size;
3195 /* The size of the first PLT entry. */
3196 int plt_initial_entry_size;
3197
3198 /* Small local sym cache. */
3199 struct sym_cache sym_cache;
3200 };
3201
3202 /* Rename some of the generic section flags to better document how they
3203 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3204
3205 /* Nonzero if this section has TLS related relocations. */
3206 #define has_tls_reloc sec_flg0
3207
3208 /* Nonzero if this section has a call to __tls_get_addr. */
3209 #define has_tls_get_addr_call sec_flg1
3210
3211 /* Get the PPC ELF linker hash table from a link_info structure. */
3212
3213 #define ppc_elf_hash_table(p) \
3214 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3215 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3216
3217 /* Create an entry in a PPC ELF linker hash table. */
3218
3219 static struct bfd_hash_entry *
3220 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3221 struct bfd_hash_table *table,
3222 const char *string)
3223 {
3224 /* Allocate the structure if it has not already been allocated by a
3225 subclass. */
3226 if (entry == NULL)
3227 {
3228 entry = bfd_hash_allocate (table,
3229 sizeof (struct ppc_elf_link_hash_entry));
3230 if (entry == NULL)
3231 return entry;
3232 }
3233
3234 /* Call the allocation method of the superclass. */
3235 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3236 if (entry != NULL)
3237 {
3238 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3239 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3240 ppc_elf_hash_entry (entry)->tls_mask = 0;
3241 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3242 }
3243
3244 return entry;
3245 }
3246
3247 /* Create a PPC ELF linker hash table. */
3248
3249 static struct bfd_link_hash_table *
3250 ppc_elf_link_hash_table_create (bfd *abfd)
3251 {
3252 struct ppc_elf_link_hash_table *ret;
3253 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3254
3255 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3256 if (ret == NULL)
3257 return NULL;
3258
3259 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3260 ppc_elf_link_hash_newfunc,
3261 sizeof (struct ppc_elf_link_hash_entry),
3262 PPC32_ELF_DATA))
3263 {
3264 free (ret);
3265 return NULL;
3266 }
3267
3268 ret->elf.init_plt_refcount.refcount = 0;
3269 ret->elf.init_plt_refcount.glist = NULL;
3270 ret->elf.init_plt_offset.offset = 0;
3271 ret->elf.init_plt_offset.glist = NULL;
3272
3273 ret->params = &default_params;
3274
3275 ret->sdata[0].name = ".sdata";
3276 ret->sdata[0].sym_name = "_SDA_BASE_";
3277 ret->sdata[0].bss_name = ".sbss";
3278
3279 ret->sdata[1].name = ".sdata2";
3280 ret->sdata[1].sym_name = "_SDA2_BASE_";
3281 ret->sdata[1].bss_name = ".sbss2";
3282
3283 ret->plt_entry_size = 12;
3284 ret->plt_slot_size = 8;
3285 ret->plt_initial_entry_size = 72;
3286
3287 return &ret->elf.root;
3288 }
3289
3290 /* Hook linker params into hash table. */
3291
3292 void
3293 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3294 {
3295 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3296
3297 if (htab)
3298 htab->params = params;
3299 }
3300
3301 /* Create .got and the related sections. */
3302
3303 static bfd_boolean
3304 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3305 {
3306 struct ppc_elf_link_hash_table *htab;
3307 asection *s;
3308 flagword flags;
3309
3310 if (!_bfd_elf_create_got_section (abfd, info))
3311 return FALSE;
3312
3313 htab = ppc_elf_hash_table (info);
3314 htab->got = s = bfd_get_linker_section (abfd, ".got");
3315 if (s == NULL)
3316 abort ();
3317
3318 if (htab->is_vxworks)
3319 {
3320 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3321 if (!htab->sgotplt)
3322 abort ();
3323 }
3324 else
3325 {
3326 /* The powerpc .got has a blrl instruction in it. Mark it
3327 executable. */
3328 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3329 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3330 if (!bfd_set_section_flags (abfd, s, flags))
3331 return FALSE;
3332 }
3333
3334 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3335 if (!htab->relgot)
3336 abort ();
3337
3338 return TRUE;
3339 }
3340
3341 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3342 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3343 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3344
3345 static bfd_boolean
3346 ppc_elf_create_linker_section (bfd *abfd,
3347 struct bfd_link_info *info,
3348 flagword flags,
3349 elf_linker_section_t *lsect)
3350 {
3351 asection *s;
3352
3353 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3354 | SEC_LINKER_CREATED);
3355
3356 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3357 if (s == NULL)
3358 return FALSE;
3359 lsect->section = s;
3360
3361 /* Define the sym on the first section of this name. */
3362 s = bfd_get_section_by_name (abfd, lsect->name);
3363
3364 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3365 if (lsect->sym == NULL)
3366 return FALSE;
3367 lsect->sym->root.u.def.value = 0x8000;
3368 return TRUE;
3369 }
3370
3371 static bfd_boolean
3372 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3373 {
3374 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3375 asection *s;
3376 flagword flags;
3377
3378 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3379 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3380 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3381 htab->glink = s;
3382 if (s == NULL
3383 || !bfd_set_section_alignment (abfd, s,
3384 htab->params->ppc476_workaround ? 6 : 4))
3385 return FALSE;
3386
3387 if (!info->no_ld_generated_unwind_info)
3388 {
3389 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3390 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3391 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3392 htab->glink_eh_frame = s;
3393 if (s == NULL
3394 || !bfd_set_section_alignment (abfd, s, 2))
3395 return FALSE;
3396 }
3397
3398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3399 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3400 htab->iplt = s;
3401 if (s == NULL
3402 || !bfd_set_section_alignment (abfd, s, 4))
3403 return FALSE;
3404
3405 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3406 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3407 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3408 htab->reliplt = s;
3409 if (s == NULL
3410 || ! bfd_set_section_alignment (abfd, s, 2))
3411 return FALSE;
3412
3413 if (!ppc_elf_create_linker_section (abfd, info, 0,
3414 &htab->sdata[0]))
3415 return FALSE;
3416
3417 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3418 &htab->sdata[1]))
3419 return FALSE;
3420
3421 return TRUE;
3422 }
3423
3424 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3425 to output sections (just like _bfd_elf_create_dynamic_sections has
3426 to create .dynbss and .rela.bss). */
3427
3428 static bfd_boolean
3429 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432 asection *s;
3433 flagword flags;
3434
3435 htab = ppc_elf_hash_table (info);
3436
3437 if (htab->got == NULL
3438 && !ppc_elf_create_got (abfd, info))
3439 return FALSE;
3440
3441 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3442 return FALSE;
3443
3444 if (htab->glink == NULL
3445 && !ppc_elf_create_glink (abfd, info))
3446 return FALSE;
3447
3448 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3449 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3450 SEC_ALLOC | SEC_LINKER_CREATED);
3451 htab->dynsbss = s;
3452 if (s == NULL)
3453 return FALSE;
3454
3455 if (! info->shared)
3456 {
3457 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3458 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3459 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3460 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3461 htab->relsbss = s;
3462 if (s == NULL
3463 || ! bfd_set_section_alignment (abfd, s, 2))
3464 return FALSE;
3465 }
3466
3467 if (htab->is_vxworks
3468 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3469 return FALSE;
3470
3471 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3472 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3473 if (s == NULL)
3474 abort ();
3475
3476 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3477 if (htab->plt_type == PLT_VXWORKS)
3478 /* The VxWorks PLT is a loaded section with contents. */
3479 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3480 return bfd_set_section_flags (abfd, s, flags);
3481 }
3482
3483 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3484
3485 static void
3486 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3487 struct elf_link_hash_entry *dir,
3488 struct elf_link_hash_entry *ind)
3489 {
3490 struct ppc_elf_link_hash_entry *edir, *eind;
3491
3492 edir = (struct ppc_elf_link_hash_entry *) dir;
3493 eind = (struct ppc_elf_link_hash_entry *) ind;
3494
3495 edir->tls_mask |= eind->tls_mask;
3496 edir->has_sda_refs |= eind->has_sda_refs;
3497
3498 /* If called to transfer flags for a weakdef during processing
3499 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3500 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3501 if (!(ELIMINATE_COPY_RELOCS
3502 && eind->elf.root.type != bfd_link_hash_indirect
3503 && edir->elf.dynamic_adjusted))
3504 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3505
3506 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3507 edir->elf.ref_regular |= eind->elf.ref_regular;
3508 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3509 edir->elf.needs_plt |= eind->elf.needs_plt;
3510 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3511
3512 if (eind->dyn_relocs != NULL)
3513 {
3514 if (edir->dyn_relocs != NULL)
3515 {
3516 struct elf_dyn_relocs **pp;
3517 struct elf_dyn_relocs *p;
3518
3519 /* Add reloc counts against the indirect sym to the direct sym
3520 list. Merge any entries against the same section. */
3521 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3522 {
3523 struct elf_dyn_relocs *q;
3524
3525 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3526 if (q->sec == p->sec)
3527 {
3528 q->pc_count += p->pc_count;
3529 q->count += p->count;
3530 *pp = p->next;
3531 break;
3532 }
3533 if (q == NULL)
3534 pp = &p->next;
3535 }
3536 *pp = edir->dyn_relocs;
3537 }
3538
3539 edir->dyn_relocs = eind->dyn_relocs;
3540 eind->dyn_relocs = NULL;
3541 }
3542
3543 /* If we were called to copy over info for a weak sym, that's all.
3544 You might think dyn_relocs need not be copied over; After all,
3545 both syms will be dynamic or both non-dynamic so we're just
3546 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3547 code in ppc_elf_adjust_dynamic_symbol needs to check for
3548 dyn_relocs in read-only sections, and it does so on what is the
3549 DIR sym here. */
3550 if (eind->elf.root.type != bfd_link_hash_indirect)
3551 return;
3552
3553 /* Copy over the GOT refcount entries that we may have already seen to
3554 the symbol which just became indirect. */
3555 edir->elf.got.refcount += eind->elf.got.refcount;
3556 eind->elf.got.refcount = 0;
3557
3558 /* And plt entries. */
3559 if (eind->elf.plt.plist != NULL)
3560 {
3561 if (edir->elf.plt.plist != NULL)
3562 {
3563 struct plt_entry **entp;
3564 struct plt_entry *ent;
3565
3566 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3567 {
3568 struct plt_entry *dent;
3569
3570 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3571 if (dent->sec == ent->sec && dent->addend == ent->addend)
3572 {
3573 dent->plt.refcount += ent->plt.refcount;
3574 *entp = ent->next;
3575 break;
3576 }
3577 if (dent == NULL)
3578 entp = &ent->next;
3579 }
3580 *entp = edir->elf.plt.plist;
3581 }
3582
3583 edir->elf.plt.plist = eind->elf.plt.plist;
3584 eind->elf.plt.plist = NULL;
3585 }
3586
3587 if (eind->elf.dynindx != -1)
3588 {
3589 if (edir->elf.dynindx != -1)
3590 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3591 edir->elf.dynstr_index);
3592 edir->elf.dynindx = eind->elf.dynindx;
3593 edir->elf.dynstr_index = eind->elf.dynstr_index;
3594 eind->elf.dynindx = -1;
3595 eind->elf.dynstr_index = 0;
3596 }
3597 }
3598
3599 /* Hook called by the linker routine which adds symbols from an object
3600 file. We use it to put .comm items in .sbss, and not .bss. */
3601
3602 static bfd_boolean
3603 ppc_elf_add_symbol_hook (bfd *abfd,
3604 struct bfd_link_info *info,
3605 Elf_Internal_Sym *sym,
3606 const char **namep ATTRIBUTE_UNUSED,
3607 flagword *flagsp ATTRIBUTE_UNUSED,
3608 asection **secp,
3609 bfd_vma *valp)
3610 {
3611 if (sym->st_shndx == SHN_COMMON
3612 && !info->relocatable
3613 && is_ppc_elf (info->output_bfd)
3614 && sym->st_size <= elf_gp_size (abfd))
3615 {
3616 /* Common symbols less than or equal to -G nn bytes are automatically
3617 put into .sbss. */
3618 struct ppc_elf_link_hash_table *htab;
3619
3620 htab = ppc_elf_hash_table (info);
3621 if (htab->sbss == NULL)
3622 {
3623 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3624
3625 if (!htab->elf.dynobj)
3626 htab->elf.dynobj = abfd;
3627
3628 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3629 ".sbss",
3630 flags);
3631 if (htab->sbss == NULL)
3632 return FALSE;
3633 }
3634
3635 *secp = htab->sbss;
3636 *valp = sym->st_size;
3637 }
3638
3639 if ((abfd->flags & DYNAMIC) == 0
3640 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3641 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3642 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3643
3644 return TRUE;
3645 }
3646 \f
3647 /* Find a linker generated pointer with a given addend and type. */
3648
3649 static elf_linker_section_pointers_t *
3650 elf_find_pointer_linker_section
3651 (elf_linker_section_pointers_t *linker_pointers,
3652 bfd_vma addend,
3653 elf_linker_section_t *lsect)
3654 {
3655 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3656 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3657 return linker_pointers;
3658
3659 return NULL;
3660 }
3661
3662 /* Allocate a pointer to live in a linker created section. */
3663
3664 static bfd_boolean
3665 elf_allocate_pointer_linker_section (bfd *abfd,
3666 elf_linker_section_t *lsect,
3667 struct elf_link_hash_entry *h,
3668 const Elf_Internal_Rela *rel)
3669 {
3670 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3671 elf_linker_section_pointers_t *linker_section_ptr;
3672 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3673 bfd_size_type amt;
3674
3675 BFD_ASSERT (lsect != NULL);
3676
3677 /* Is this a global symbol? */
3678 if (h != NULL)
3679 {
3680 struct ppc_elf_link_hash_entry *eh;
3681
3682 /* Has this symbol already been allocated? If so, our work is done. */
3683 eh = (struct ppc_elf_link_hash_entry *) h;
3684 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3685 rel->r_addend,
3686 lsect))
3687 return TRUE;
3688
3689 ptr_linker_section_ptr = &eh->linker_section_pointer;
3690 }
3691 else
3692 {
3693 BFD_ASSERT (is_ppc_elf (abfd));
3694
3695 /* Allocation of a pointer to a local symbol. */
3696 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3697
3698 /* Allocate a table to hold the local symbols if first time. */
3699 if (!ptr)
3700 {
3701 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3702
3703 amt = num_symbols;
3704 amt *= sizeof (elf_linker_section_pointers_t *);
3705 ptr = bfd_zalloc (abfd, amt);
3706
3707 if (!ptr)
3708 return FALSE;
3709
3710 elf_local_ptr_offsets (abfd) = ptr;
3711 }
3712
3713 /* Has this symbol already been allocated? If so, our work is done. */
3714 if (elf_find_pointer_linker_section (ptr[r_symndx],
3715 rel->r_addend,
3716 lsect))
3717 return TRUE;
3718
3719 ptr_linker_section_ptr = &ptr[r_symndx];
3720 }
3721
3722 /* Allocate space for a pointer in the linker section, and allocate
3723 a new pointer record from internal memory. */
3724 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3725 amt = sizeof (elf_linker_section_pointers_t);
3726 linker_section_ptr = bfd_alloc (abfd, amt);
3727
3728 if (!linker_section_ptr)
3729 return FALSE;
3730
3731 linker_section_ptr->next = *ptr_linker_section_ptr;
3732 linker_section_ptr->addend = rel->r_addend;
3733 linker_section_ptr->lsect = lsect;
3734 *ptr_linker_section_ptr = linker_section_ptr;
3735
3736 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3737 return FALSE;
3738 linker_section_ptr->offset = lsect->section->size;
3739 lsect->section->size += 4;
3740
3741 #ifdef DEBUG
3742 fprintf (stderr,
3743 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3744 lsect->name, (long) linker_section_ptr->offset,
3745 (long) lsect->section->size);
3746 #endif
3747
3748 return TRUE;
3749 }
3750
3751 static struct plt_entry **
3752 update_local_sym_info (bfd *abfd,
3753 Elf_Internal_Shdr *symtab_hdr,
3754 unsigned long r_symndx,
3755 int tls_type)
3756 {
3757 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3758 struct plt_entry **local_plt;
3759 char *local_got_tls_masks;
3760
3761 if (local_got_refcounts == NULL)
3762 {
3763 bfd_size_type size = symtab_hdr->sh_info;
3764
3765 size *= (sizeof (*local_got_refcounts)
3766 + sizeof (*local_plt)
3767 + sizeof (*local_got_tls_masks));
3768 local_got_refcounts = bfd_zalloc (abfd, size);
3769 if (local_got_refcounts == NULL)
3770 return NULL;
3771 elf_local_got_refcounts (abfd) = local_got_refcounts;
3772 }
3773
3774 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3775 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3776 local_got_tls_masks[r_symndx] |= tls_type;
3777 if (tls_type != PLT_IFUNC)
3778 local_got_refcounts[r_symndx] += 1;
3779 return local_plt + r_symndx;
3780 }
3781
3782 static bfd_boolean
3783 update_plt_info (bfd *abfd, struct plt_entry **plist,
3784 asection *sec, bfd_vma addend)
3785 {
3786 struct plt_entry *ent;
3787
3788 if (addend < 32768)
3789 sec = NULL;
3790 for (ent = *plist; ent != NULL; ent = ent->next)
3791 if (ent->sec == sec && ent->addend == addend)
3792 break;
3793 if (ent == NULL)
3794 {
3795 bfd_size_type amt = sizeof (*ent);
3796 ent = bfd_alloc (abfd, amt);
3797 if (ent == NULL)
3798 return FALSE;
3799 ent->next = *plist;
3800 ent->sec = sec;
3801 ent->addend = addend;
3802 ent->plt.refcount = 0;
3803 *plist = ent;
3804 }
3805 ent->plt.refcount += 1;
3806 return TRUE;
3807 }
3808
3809 static struct plt_entry *
3810 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3811 {
3812 struct plt_entry *ent;
3813
3814 if (addend < 32768)
3815 sec = NULL;
3816 for (ent = *plist; ent != NULL; ent = ent->next)
3817 if (ent->sec == sec && ent->addend == addend)
3818 break;
3819 return ent;
3820 }
3821
3822 static bfd_boolean
3823 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3824 {
3825 return (r_type == R_PPC_PLTREL24
3826 || r_type == R_PPC_LOCAL24PC
3827 || r_type == R_PPC_REL24
3828 || r_type == R_PPC_REL14
3829 || r_type == R_PPC_REL14_BRTAKEN
3830 || r_type == R_PPC_REL14_BRNTAKEN
3831 || r_type == R_PPC_ADDR24
3832 || r_type == R_PPC_ADDR14
3833 || r_type == R_PPC_ADDR14_BRTAKEN
3834 || r_type == R_PPC_ADDR14_BRNTAKEN);
3835 }
3836
3837 static void
3838 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3839 {
3840 (*_bfd_error_handler)
3841 (_("%B: relocation %s cannot be used when making a shared object"),
3842 abfd,
3843 ppc_elf_howto_table[r_type]->name);
3844 bfd_set_error (bfd_error_bad_value);
3845 }
3846
3847 /* Look through the relocs for a section during the first phase, and
3848 allocate space in the global offset table or procedure linkage
3849 table. */
3850
3851 static bfd_boolean
3852 ppc_elf_check_relocs (bfd *abfd,
3853 struct bfd_link_info *info,
3854 asection *sec,
3855 const Elf_Internal_Rela *relocs)
3856 {
3857 struct ppc_elf_link_hash_table *htab;
3858 Elf_Internal_Shdr *symtab_hdr;
3859 struct elf_link_hash_entry **sym_hashes;
3860 const Elf_Internal_Rela *rel;
3861 const Elf_Internal_Rela *rel_end;
3862 asection *got2, *sreloc;
3863 struct elf_link_hash_entry *tga;
3864
3865 if (info->relocatable)
3866 return TRUE;
3867
3868 /* Don't do anything special with non-loaded, non-alloced sections.
3869 In particular, any relocs in such sections should not affect GOT
3870 and PLT reference counting (ie. we don't allow them to create GOT
3871 or PLT entries), there's no possibility or desire to optimize TLS
3872 relocs, and there's not much point in propagating relocs to shared
3873 libs that the dynamic linker won't relocate. */
3874 if ((sec->flags & SEC_ALLOC) == 0)
3875 return TRUE;
3876
3877 #ifdef DEBUG
3878 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3879 sec, abfd);
3880 #endif
3881
3882 BFD_ASSERT (is_ppc_elf (abfd));
3883
3884 /* Initialize howto table if not already done. */
3885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3886 ppc_elf_howto_init ();
3887
3888 htab = ppc_elf_hash_table (info);
3889 if (htab->glink == NULL)
3890 {
3891 if (htab->elf.dynobj == NULL)
3892 htab->elf.dynobj = abfd;
3893 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3894 return FALSE;
3895 }
3896 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3897 FALSE, FALSE, TRUE);
3898 symtab_hdr = &elf_symtab_hdr (abfd);
3899 sym_hashes = elf_sym_hashes (abfd);
3900 got2 = bfd_get_section_by_name (abfd, ".got2");
3901 sreloc = NULL;
3902
3903 rel_end = relocs + sec->reloc_count;
3904 for (rel = relocs; rel < rel_end; rel++)
3905 {
3906 unsigned long r_symndx;
3907 enum elf_ppc_reloc_type r_type;
3908 struct elf_link_hash_entry *h;
3909 int tls_type;
3910
3911 r_symndx = ELF32_R_SYM (rel->r_info);
3912 if (r_symndx < symtab_hdr->sh_info)
3913 h = NULL;
3914 else
3915 {
3916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3917 while (h->root.type == bfd_link_hash_indirect
3918 || h->root.type == bfd_link_hash_warning)
3919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3920
3921 /* PR15323, ref flags aren't set for references in the same
3922 object. */
3923 h->root.non_ir_ref = 1;
3924 }
3925
3926 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3927 This shows up in particular in an R_PPC_ADDR32 in the eabi
3928 startup code. */
3929 if (h != NULL
3930 && htab->got == NULL
3931 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3932 {
3933 if (htab->elf.dynobj == NULL)
3934 htab->elf.dynobj = abfd;
3935 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3936 return FALSE;
3937 BFD_ASSERT (h == htab->elf.hgot);
3938 }
3939
3940 tls_type = 0;
3941 r_type = ELF32_R_TYPE (rel->r_info);
3942 if (h == NULL && !htab->is_vxworks)
3943 {
3944 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3945 abfd, r_symndx);
3946 if (isym == NULL)
3947 return FALSE;
3948
3949 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3950 {
3951 struct plt_entry **ifunc;
3952
3953 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3954 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3955 PLT_IFUNC);
3956 if (ifunc == NULL)
3957 return FALSE;
3958
3959 /* STT_GNU_IFUNC symbols must have a PLT entry;
3960 In a non-pie executable even when there are
3961 no plt calls. */
3962 if (!info->shared
3963 || is_branch_reloc (r_type))
3964 {
3965 bfd_vma addend = 0;
3966 if (r_type == R_PPC_PLTREL24)
3967 {
3968 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3969 if (info->shared)
3970 addend = rel->r_addend;
3971 }
3972 if (!update_plt_info (abfd, ifunc, got2, addend))
3973 return FALSE;
3974 }
3975 }
3976 }
3977
3978 if (!htab->is_vxworks
3979 && is_branch_reloc (r_type)
3980 && h != NULL
3981 && h == tga)
3982 {
3983 if (rel != relocs
3984 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3985 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3986 /* We have a new-style __tls_get_addr call with a marker
3987 reloc. */
3988 ;
3989 else
3990 /* Mark this section as having an old-style call. */
3991 sec->has_tls_get_addr_call = 1;
3992 }
3993
3994 switch (r_type)
3995 {
3996 case R_PPC_TLSGD:
3997 case R_PPC_TLSLD:
3998 /* These special tls relocs tie a call to __tls_get_addr with
3999 its parameter symbol. */
4000 break;
4001
4002 case R_PPC_GOT_TLSLD16:
4003 case R_PPC_GOT_TLSLD16_LO:
4004 case R_PPC_GOT_TLSLD16_HI:
4005 case R_PPC_GOT_TLSLD16_HA:
4006 tls_type = TLS_TLS | TLS_LD;
4007 goto dogottls;
4008
4009 case R_PPC_GOT_TLSGD16:
4010 case R_PPC_GOT_TLSGD16_LO:
4011 case R_PPC_GOT_TLSGD16_HI:
4012 case R_PPC_GOT_TLSGD16_HA:
4013 tls_type = TLS_TLS | TLS_GD;
4014 goto dogottls;
4015
4016 case R_PPC_GOT_TPREL16:
4017 case R_PPC_GOT_TPREL16_LO:
4018 case R_PPC_GOT_TPREL16_HI:
4019 case R_PPC_GOT_TPREL16_HA:
4020 if (info->shared)
4021 info->flags |= DF_STATIC_TLS;
4022 tls_type = TLS_TLS | TLS_TPREL;
4023 goto dogottls;
4024
4025 case R_PPC_GOT_DTPREL16:
4026 case R_PPC_GOT_DTPREL16_LO:
4027 case R_PPC_GOT_DTPREL16_HI:
4028 case R_PPC_GOT_DTPREL16_HA:
4029 tls_type = TLS_TLS | TLS_DTPREL;
4030 dogottls:
4031 sec->has_tls_reloc = 1;
4032 /* Fall thru */
4033
4034 /* GOT16 relocations */
4035 case R_PPC_GOT16:
4036 case R_PPC_GOT16_LO:
4037 case R_PPC_GOT16_HI:
4038 case R_PPC_GOT16_HA:
4039 /* This symbol requires a global offset table entry. */
4040 if (htab->got == NULL)
4041 {
4042 if (htab->elf.dynobj == NULL)
4043 htab->elf.dynobj = abfd;
4044 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4045 return FALSE;
4046 }
4047 if (h != NULL)
4048 {
4049 h->got.refcount += 1;
4050 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4051 }
4052 else
4053 /* This is a global offset table entry for a local symbol. */
4054 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4055 return FALSE;
4056
4057 /* We may also need a plt entry if the symbol turns out to be
4058 an ifunc. */
4059 if (h != NULL && !info->shared)
4060 {
4061 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4062 return FALSE;
4063 }
4064 break;
4065
4066 /* Indirect .sdata relocation. */
4067 case R_PPC_EMB_SDAI16:
4068 if (info->shared)
4069 {
4070 bad_shared_reloc (abfd, r_type);
4071 return FALSE;
4072 }
4073 htab->sdata[0].sym->ref_regular = 1;
4074 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4075 h, rel))
4076 return FALSE;
4077 if (h != NULL)
4078 {
4079 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4080 h->non_got_ref = TRUE;
4081 }
4082 break;
4083
4084 /* Indirect .sdata2 relocation. */
4085 case R_PPC_EMB_SDA2I16:
4086 if (info->shared)
4087 {
4088 bad_shared_reloc (abfd, r_type);
4089 return FALSE;
4090 }
4091 htab->sdata[1].sym->ref_regular = 1;
4092 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4093 h, rel))
4094 return FALSE;
4095 if (h != NULL)
4096 {
4097 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4098 h->non_got_ref = TRUE;
4099 }
4100 break;
4101
4102 case R_PPC_SDAREL16:
4103 htab->sdata[0].sym->ref_regular = 1;
4104 /* Fall thru */
4105
4106 case R_PPC_VLE_SDAREL_LO16A:
4107 case R_PPC_VLE_SDAREL_LO16D:
4108 case R_PPC_VLE_SDAREL_HI16A:
4109 case R_PPC_VLE_SDAREL_HI16D:
4110 case R_PPC_VLE_SDAREL_HA16A:
4111 case R_PPC_VLE_SDAREL_HA16D:
4112 if (h != NULL)
4113 {
4114 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4115 h->non_got_ref = TRUE;
4116 }
4117 break;
4118
4119 case R_PPC_VLE_REL8:
4120 case R_PPC_VLE_REL15:
4121 case R_PPC_VLE_REL24:
4122 case R_PPC_VLE_LO16A:
4123 case R_PPC_VLE_LO16D:
4124 case R_PPC_VLE_HI16A:
4125 case R_PPC_VLE_HI16D:
4126 case R_PPC_VLE_HA16A:
4127 case R_PPC_VLE_HA16D:
4128 break;
4129
4130 case R_PPC_EMB_SDA2REL:
4131 if (info->shared)
4132 {
4133 bad_shared_reloc (abfd, r_type);
4134 return FALSE;
4135 }
4136 htab->sdata[1].sym->ref_regular = 1;
4137 if (h != NULL)
4138 {
4139 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4140 h->non_got_ref = TRUE;
4141 }
4142 break;
4143
4144 case R_PPC_VLE_SDA21_LO:
4145 case R_PPC_VLE_SDA21:
4146 case R_PPC_EMB_SDA21:
4147 case R_PPC_EMB_RELSDA:
4148 if (info->shared)
4149 {
4150 bad_shared_reloc (abfd, r_type);
4151 return FALSE;
4152 }
4153 if (h != NULL)
4154 {
4155 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4156 h->non_got_ref = TRUE;
4157 }
4158 break;
4159
4160 case R_PPC_EMB_NADDR32:
4161 case R_PPC_EMB_NADDR16:
4162 case R_PPC_EMB_NADDR16_LO:
4163 case R_PPC_EMB_NADDR16_HI:
4164 case R_PPC_EMB_NADDR16_HA:
4165 if (info->shared)
4166 {
4167 bad_shared_reloc (abfd, r_type);
4168 return FALSE;
4169 }
4170 if (h != NULL)
4171 h->non_got_ref = TRUE;
4172 break;
4173
4174 case R_PPC_PLTREL24:
4175 if (h == NULL)
4176 break;
4177 /* Fall through */
4178 case R_PPC_PLT32:
4179 case R_PPC_PLTREL32:
4180 case R_PPC_PLT16_LO:
4181 case R_PPC_PLT16_HI:
4182 case R_PPC_PLT16_HA:
4183 #ifdef DEBUG
4184 fprintf (stderr, "Reloc requires a PLT entry\n");
4185 #endif
4186 /* This symbol requires a procedure linkage table entry. We
4187 actually build the entry in finish_dynamic_symbol,
4188 because this might be a case of linking PIC code without
4189 linking in any dynamic objects, in which case we don't
4190 need to generate a procedure linkage table after all. */
4191
4192 if (h == NULL)
4193 {
4194 /* It does not make sense to have a procedure linkage
4195 table entry for a local symbol. */
4196 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4197 abfd, sec, rel->r_offset,
4198 ppc_elf_howto_table[r_type]->name);
4199 bfd_set_error (bfd_error_bad_value);
4200 return FALSE;
4201 }
4202 else
4203 {
4204 bfd_vma addend = 0;
4205
4206 if (r_type == R_PPC_PLTREL24)
4207 {
4208 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4209 if (info->shared)
4210 addend = rel->r_addend;
4211 }
4212 h->needs_plt = 1;
4213 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4214 return FALSE;
4215 }
4216 break;
4217
4218 /* The following relocations don't need to propagate the
4219 relocation if linking a shared object since they are
4220 section relative. */
4221 case R_PPC_SECTOFF:
4222 case R_PPC_SECTOFF_LO:
4223 case R_PPC_SECTOFF_HI:
4224 case R_PPC_SECTOFF_HA:
4225 case R_PPC_DTPREL16:
4226 case R_PPC_DTPREL16_LO:
4227 case R_PPC_DTPREL16_HI:
4228 case R_PPC_DTPREL16_HA:
4229 case R_PPC_TOC16:
4230 break;
4231
4232 case R_PPC_REL16:
4233 case R_PPC_REL16_LO:
4234 case R_PPC_REL16_HI:
4235 case R_PPC_REL16_HA:
4236 ppc_elf_tdata (abfd)->has_rel16 = 1;
4237 break;
4238
4239 /* These are just markers. */
4240 case R_PPC_TLS:
4241 case R_PPC_EMB_MRKREF:
4242 case R_PPC_NONE:
4243 case R_PPC_max:
4244 case R_PPC_RELAX:
4245 case R_PPC_RELAX_PLT:
4246 case R_PPC_RELAX_PLTREL24:
4247 break;
4248
4249 /* These should only appear in dynamic objects. */
4250 case R_PPC_COPY:
4251 case R_PPC_GLOB_DAT:
4252 case R_PPC_JMP_SLOT:
4253 case R_PPC_RELATIVE:
4254 case R_PPC_IRELATIVE:
4255 break;
4256
4257 /* These aren't handled yet. We'll report an error later. */
4258 case R_PPC_ADDR30:
4259 case R_PPC_EMB_RELSEC16:
4260 case R_PPC_EMB_RELST_LO:
4261 case R_PPC_EMB_RELST_HI:
4262 case R_PPC_EMB_RELST_HA:
4263 case R_PPC_EMB_BIT_FLD:
4264 break;
4265
4266 /* This refers only to functions defined in the shared library. */
4267 case R_PPC_LOCAL24PC:
4268 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4269 {
4270 htab->plt_type = PLT_OLD;
4271 htab->old_bfd = abfd;
4272 }
4273 if (h != NULL && h->type == STT_GNU_IFUNC)
4274 {
4275 if (info->shared)
4276 {
4277 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4278 abfd, sec, rel->r_offset,
4279 h->root.root.string);
4280 bfd_set_error (bfd_error_bad_value);
4281 return FALSE;
4282 }
4283 h->needs_plt = 1;
4284 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4285 return FALSE;
4286 }
4287 break;
4288
4289 /* This relocation describes the C++ object vtable hierarchy.
4290 Reconstruct it for later use during GC. */
4291 case R_PPC_GNU_VTINHERIT:
4292 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4293 return FALSE;
4294 break;
4295
4296 /* This relocation describes which C++ vtable entries are actually
4297 used. Record for later use during GC. */
4298 case R_PPC_GNU_VTENTRY:
4299 BFD_ASSERT (h != NULL);
4300 if (h != NULL
4301 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4302 return FALSE;
4303 break;
4304
4305 /* We shouldn't really be seeing these. */
4306 case R_PPC_TPREL32:
4307 case R_PPC_TPREL16:
4308 case R_PPC_TPREL16_LO:
4309 case R_PPC_TPREL16_HI:
4310 case R_PPC_TPREL16_HA:
4311 if (info->shared)
4312 info->flags |= DF_STATIC_TLS;
4313 goto dodyn;
4314
4315 /* Nor these. */
4316 case R_PPC_DTPMOD32:
4317 case R_PPC_DTPREL32:
4318 goto dodyn;
4319
4320 case R_PPC_REL32:
4321 if (h == NULL
4322 && got2 != NULL
4323 && (sec->flags & SEC_CODE) != 0
4324 && info->shared
4325 && htab->plt_type == PLT_UNSET)
4326 {
4327 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4328 the start of a function, which assembles to a REL32
4329 reference to .got2. If we detect one of these, then
4330 force the old PLT layout because the linker cannot
4331 reliably deduce the GOT pointer value needed for
4332 PLT call stubs. */
4333 asection *s;
4334 Elf_Internal_Sym *isym;
4335
4336 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4337 abfd, r_symndx);
4338 if (isym == NULL)
4339 return FALSE;
4340
4341 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4342 if (s == got2)
4343 {
4344 htab->plt_type = PLT_OLD;
4345 htab->old_bfd = abfd;
4346 }
4347 }
4348 if (h == NULL || h == htab->elf.hgot)
4349 break;
4350 /* fall through */
4351
4352 case R_PPC_ADDR32:
4353 case R_PPC_ADDR16:
4354 case R_PPC_ADDR16_LO:
4355 case R_PPC_ADDR16_HI:
4356 case R_PPC_ADDR16_HA:
4357 case R_PPC_UADDR32:
4358 case R_PPC_UADDR16:
4359 if (h != NULL && !info->shared)
4360 {
4361 /* We may need a plt entry if the symbol turns out to be
4362 a function defined in a dynamic object. */
4363 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4364 return FALSE;
4365
4366 /* We may need a copy reloc too. */
4367 h->non_got_ref = 1;
4368 h->pointer_equality_needed = 1;
4369 }
4370 goto dodyn;
4371
4372 case R_PPC_REL24:
4373 case R_PPC_REL14:
4374 case R_PPC_REL14_BRTAKEN:
4375 case R_PPC_REL14_BRNTAKEN:
4376 if (h == NULL)
4377 break;
4378 if (h == htab->elf.hgot)
4379 {
4380 if (htab->plt_type == PLT_UNSET)
4381 {
4382 htab->plt_type = PLT_OLD;
4383 htab->old_bfd = abfd;
4384 }
4385 break;
4386 }
4387 /* fall through */
4388
4389 case R_PPC_ADDR24:
4390 case R_PPC_ADDR14:
4391 case R_PPC_ADDR14_BRTAKEN:
4392 case R_PPC_ADDR14_BRNTAKEN:
4393 if (h != NULL && !info->shared)
4394 {
4395 /* We may need a plt entry if the symbol turns out to be
4396 a function defined in a dynamic object. */
4397 h->needs_plt = 1;
4398 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4399 return FALSE;
4400 break;
4401 }
4402
4403 dodyn:
4404 /* If we are creating a shared library, and this is a reloc
4405 against a global symbol, or a non PC relative reloc
4406 against a local symbol, then we need to copy the reloc
4407 into the shared library. However, if we are linking with
4408 -Bsymbolic, we do not need to copy a reloc against a
4409 global symbol which is defined in an object we are
4410 including in the link (i.e., DEF_REGULAR is set). At
4411 this point we have not seen all the input files, so it is
4412 possible that DEF_REGULAR is not set now but will be set
4413 later (it is never cleared). In case of a weak definition,
4414 DEF_REGULAR may be cleared later by a strong definition in
4415 a shared library. We account for that possibility below by
4416 storing information in the dyn_relocs field of the hash
4417 table entry. A similar situation occurs when creating
4418 shared libraries and symbol visibility changes render the
4419 symbol local.
4420
4421 If on the other hand, we are creating an executable, we
4422 may need to keep relocations for symbols satisfied by a
4423 dynamic library if we manage to avoid copy relocs for the
4424 symbol. */
4425 if ((info->shared
4426 && (must_be_dyn_reloc (info, r_type)
4427 || (h != NULL
4428 && (!SYMBOLIC_BIND (info, h)
4429 || h->root.type == bfd_link_hash_defweak
4430 || !h->def_regular))))
4431 || (ELIMINATE_COPY_RELOCS
4432 && !info->shared
4433 && h != NULL
4434 && (h->root.type == bfd_link_hash_defweak
4435 || !h->def_regular)))
4436 {
4437 #ifdef DEBUG
4438 fprintf (stderr,
4439 "ppc_elf_check_relocs needs to "
4440 "create relocation for %s\n",
4441 (h && h->root.root.string
4442 ? h->root.root.string : "<unknown>"));
4443 #endif
4444 if (sreloc == NULL)
4445 {
4446 if (htab->elf.dynobj == NULL)
4447 htab->elf.dynobj = abfd;
4448
4449 sreloc = _bfd_elf_make_dynamic_reloc_section
4450 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4451
4452 if (sreloc == NULL)
4453 return FALSE;
4454 }
4455
4456 /* If this is a global symbol, we count the number of
4457 relocations we need for this symbol. */
4458 if (h != NULL)
4459 {
4460 struct elf_dyn_relocs *p;
4461 struct elf_dyn_relocs **rel_head;
4462
4463 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4464 p = *rel_head;
4465 if (p == NULL || p->sec != sec)
4466 {
4467 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4468 if (p == NULL)
4469 return FALSE;
4470 p->next = *rel_head;
4471 *rel_head = p;
4472 p->sec = sec;
4473 p->count = 0;
4474 p->pc_count = 0;
4475 }
4476 p->count += 1;
4477 if (!must_be_dyn_reloc (info, r_type))
4478 p->pc_count += 1;
4479 }
4480 else
4481 {
4482 /* Track dynamic relocs needed for local syms too.
4483 We really need local syms available to do this
4484 easily. Oh well. */
4485 struct ppc_dyn_relocs *p;
4486 struct ppc_dyn_relocs **rel_head;
4487 bfd_boolean is_ifunc;
4488 asection *s;
4489 void *vpp;
4490 Elf_Internal_Sym *isym;
4491
4492 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4493 abfd, r_symndx);
4494 if (isym == NULL)
4495 return FALSE;
4496
4497 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4498 if (s == NULL)
4499 s = sec;
4500
4501 vpp = &elf_section_data (s)->local_dynrel;
4502 rel_head = (struct ppc_dyn_relocs **) vpp;
4503 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4504 p = *rel_head;
4505 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4506 p = p->next;
4507 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4508 {
4509 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4510 if (p == NULL)
4511 return FALSE;
4512 p->next = *rel_head;
4513 *rel_head = p;
4514 p->sec = sec;
4515 p->ifunc = is_ifunc;
4516 p->count = 0;
4517 }
4518 p->count += 1;
4519 }
4520 }
4521
4522 break;
4523 }
4524 }
4525
4526 return TRUE;
4527 }
4528 \f
4529
4530 /* Merge object attributes from IBFD into OBFD. Raise an error if
4531 there are conflicting attributes. */
4532 static bfd_boolean
4533 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4534 {
4535 obj_attribute *in_attr, *in_attrs;
4536 obj_attribute *out_attr, *out_attrs;
4537
4538 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4539 {
4540 /* This is the first object. Copy the attributes. */
4541 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4542
4543 /* Use the Tag_null value to indicate the attributes have been
4544 initialized. */
4545 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4546
4547 return TRUE;
4548 }
4549
4550 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4551 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4552
4553 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4554 non-conflicting ones. */
4555 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4556 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4557 if (in_attr->i != out_attr->i)
4558 {
4559 out_attr->type = 1;
4560 if (out_attr->i == 0)
4561 out_attr->i = in_attr->i;
4562 else if (in_attr->i == 0)
4563 ;
4564 else if (out_attr->i == 1 && in_attr->i == 2)
4565 _bfd_error_handler
4566 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4567 else if (out_attr->i == 1 && in_attr->i == 3)
4568 _bfd_error_handler
4569 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4570 obfd, ibfd);
4571 else if (out_attr->i == 3 && in_attr->i == 1)
4572 _bfd_error_handler
4573 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4574 ibfd, obfd);
4575 else if (out_attr->i == 3 && in_attr->i == 2)
4576 _bfd_error_handler
4577 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4578 ibfd, obfd);
4579 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4580 _bfd_error_handler
4581 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4582 else if (in_attr->i > 3)
4583 _bfd_error_handler
4584 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4585 in_attr->i);
4586 else
4587 _bfd_error_handler
4588 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4589 out_attr->i);
4590 }
4591
4592 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4593 merge non-conflicting ones. */
4594 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4595 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4596 if (in_attr->i != out_attr->i)
4597 {
4598 const char *in_abi = NULL, *out_abi = NULL;
4599
4600 switch (in_attr->i)
4601 {
4602 case 1: in_abi = "generic"; break;
4603 case 2: in_abi = "AltiVec"; break;
4604 case 3: in_abi = "SPE"; break;
4605 }
4606
4607 switch (out_attr->i)
4608 {
4609 case 1: out_abi = "generic"; break;
4610 case 2: out_abi = "AltiVec"; break;
4611 case 3: out_abi = "SPE"; break;
4612 }
4613
4614 out_attr->type = 1;
4615 if (out_attr->i == 0)
4616 out_attr->i = in_attr->i;
4617 else if (in_attr->i == 0)
4618 ;
4619 /* For now, allow generic to transition to AltiVec or SPE
4620 without a warning. If GCC marked files with their stack
4621 alignment and used don't-care markings for files which are
4622 not affected by the vector ABI, we could warn about this
4623 case too. */
4624 else if (out_attr->i == 1)
4625 out_attr->i = in_attr->i;
4626 else if (in_attr->i == 1)
4627 ;
4628 else if (in_abi == NULL)
4629 _bfd_error_handler
4630 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4631 in_attr->i);
4632 else if (out_abi == NULL)
4633 _bfd_error_handler
4634 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4635 in_attr->i);
4636 else
4637 _bfd_error_handler
4638 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4639 ibfd, obfd, in_abi, out_abi);
4640 }
4641
4642 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4643 and merge non-conflicting ones. */
4644 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4645 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4646 if (in_attr->i != out_attr->i)
4647 {
4648 out_attr->type = 1;
4649 if (out_attr->i == 0)
4650 out_attr->i = in_attr->i;
4651 else if (in_attr->i == 0)
4652 ;
4653 else if (out_attr->i == 1 && in_attr->i == 2)
4654 _bfd_error_handler
4655 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4656 else if (out_attr->i == 2 && in_attr->i == 1)
4657 _bfd_error_handler
4658 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4659 else if (in_attr->i > 2)
4660 _bfd_error_handler
4661 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4662 in_attr->i);
4663 else
4664 _bfd_error_handler
4665 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4666 out_attr->i);
4667 }
4668
4669 /* Merge Tag_compatibility attributes and any common GNU ones. */
4670 _bfd_elf_merge_object_attributes (ibfd, obfd);
4671
4672 return TRUE;
4673 }
4674
4675 /* Merge backend specific data from an object file to the output
4676 object file when linking. */
4677
4678 static bfd_boolean
4679 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4680 {
4681 flagword old_flags;
4682 flagword new_flags;
4683 bfd_boolean error;
4684
4685 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4686 return TRUE;
4687
4688 /* Check if we have the same endianness. */
4689 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4690 return FALSE;
4691
4692 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4693 return FALSE;
4694
4695 new_flags = elf_elfheader (ibfd)->e_flags;
4696 old_flags = elf_elfheader (obfd)->e_flags;
4697 if (!elf_flags_init (obfd))
4698 {
4699 /* First call, no flags set. */
4700 elf_flags_init (obfd) = TRUE;
4701 elf_elfheader (obfd)->e_flags = new_flags;
4702 }
4703
4704 /* Compatible flags are ok. */
4705 else if (new_flags == old_flags)
4706 ;
4707
4708 /* Incompatible flags. */
4709 else
4710 {
4711 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4712 to be linked with either. */
4713 error = FALSE;
4714 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4715 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4716 {
4717 error = TRUE;
4718 (*_bfd_error_handler)
4719 (_("%B: compiled with -mrelocatable and linked with "
4720 "modules compiled normally"), ibfd);
4721 }
4722 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4723 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4724 {
4725 error = TRUE;
4726 (*_bfd_error_handler)
4727 (_("%B: compiled normally and linked with "
4728 "modules compiled with -mrelocatable"), ibfd);
4729 }
4730
4731 /* The output is -mrelocatable-lib iff both the input files are. */
4732 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4733 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4734
4735 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4736 but each input file is either -mrelocatable or -mrelocatable-lib. */
4737 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4738 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4739 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4740 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4741
4742 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4743 any module uses it. */
4744 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4745
4746 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4747 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4748
4749 /* Warn about any other mismatches. */
4750 if (new_flags != old_flags)
4751 {
4752 error = TRUE;
4753 (*_bfd_error_handler)
4754 (_("%B: uses different e_flags (0x%lx) fields "
4755 "than previous modules (0x%lx)"),
4756 ibfd, (long) new_flags, (long) old_flags);
4757 }
4758
4759 if (error)
4760 {
4761 bfd_set_error (bfd_error_bad_value);
4762 return FALSE;
4763 }
4764 }
4765
4766 return TRUE;
4767 }
4768
4769 static void
4770 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4771 bfd_vma value,
4772 split16_format_type split16_format)
4773
4774 {
4775 unsigned int insn, top5;
4776
4777 insn = bfd_get_32 (output_bfd, loc);
4778 top5 = value & 0xf800;
4779 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4780 insn |= top5;
4781 insn |= value & 0x7ff;
4782 bfd_put_32 (output_bfd, insn, loc);
4783 }
4784
4785 \f
4786 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4787 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4788 int
4789 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4790 struct bfd_link_info *info)
4791 {
4792 struct ppc_elf_link_hash_table *htab;
4793 flagword flags;
4794
4795 htab = ppc_elf_hash_table (info);
4796
4797 if (htab->plt_type == PLT_UNSET)
4798 {
4799 struct elf_link_hash_entry *h;
4800
4801 if (htab->params->plt_style == PLT_OLD)
4802 htab->plt_type = PLT_OLD;
4803 else if (info->shared
4804 && htab->elf.dynamic_sections_created
4805 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4806 FALSE, FALSE, TRUE)) != NULL
4807 && (h->type == STT_FUNC
4808 || h->needs_plt)
4809 && h->ref_regular
4810 && !(SYMBOL_CALLS_LOCAL (info, h)
4811 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4812 && h->root.type == bfd_link_hash_undefweak)))
4813 {
4814 /* Profiling of shared libs (and pies) is not supported with
4815 secure plt, because ppc32 does profiling before a
4816 function prologue and a secure plt pic call stubs needs
4817 r30 to be set up. */
4818 htab->plt_type = PLT_OLD;
4819 }
4820 else
4821 {
4822 bfd *ibfd;
4823 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4824
4825 /* Look through the reloc flags left by ppc_elf_check_relocs.
4826 Use the old style bss plt if a file makes plt calls
4827 without using the new relocs, and if ld isn't given
4828 --secure-plt and we never see REL16 relocs. */
4829 if (plt_type == PLT_UNSET)
4830 plt_type = PLT_OLD;
4831 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4832 if (is_ppc_elf (ibfd))
4833 {
4834 if (ppc_elf_tdata (ibfd)->has_rel16)
4835 plt_type = PLT_NEW;
4836 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4837 {
4838 plt_type = PLT_OLD;
4839 htab->old_bfd = ibfd;
4840 break;
4841 }
4842 }
4843 htab->plt_type = plt_type;
4844 }
4845 }
4846 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4847 {
4848 if (htab->old_bfd != NULL)
4849 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4850 htab->old_bfd);
4851 else
4852 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4853 }
4854
4855 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4856
4857 if (htab->plt_type == PLT_NEW)
4858 {
4859 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4861
4862 /* The new PLT is a loaded section. */
4863 if (htab->plt != NULL
4864 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4865 return -1;
4866
4867 /* The new GOT is not executable. */
4868 if (htab->got != NULL
4869 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4870 return -1;
4871 }
4872 else
4873 {
4874 /* Stop an unused .glink section from affecting .text alignment. */
4875 if (htab->glink != NULL
4876 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4877 return -1;
4878 }
4879 return htab->plt_type == PLT_NEW;
4880 }
4881 \f
4882 /* Return the section that should be marked against GC for a given
4883 relocation. */
4884
4885 static asection *
4886 ppc_elf_gc_mark_hook (asection *sec,
4887 struct bfd_link_info *info,
4888 Elf_Internal_Rela *rel,
4889 struct elf_link_hash_entry *h,
4890 Elf_Internal_Sym *sym)
4891 {
4892 if (h != NULL)
4893 switch (ELF32_R_TYPE (rel->r_info))
4894 {
4895 case R_PPC_GNU_VTINHERIT:
4896 case R_PPC_GNU_VTENTRY:
4897 return NULL;
4898 }
4899
4900 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4901 }
4902
4903 /* Update the got, plt and dynamic reloc reference counts for the
4904 section being removed. */
4905
4906 static bfd_boolean
4907 ppc_elf_gc_sweep_hook (bfd *abfd,
4908 struct bfd_link_info *info,
4909 asection *sec,
4910 const Elf_Internal_Rela *relocs)
4911 {
4912 struct ppc_elf_link_hash_table *htab;
4913 Elf_Internal_Shdr *symtab_hdr;
4914 struct elf_link_hash_entry **sym_hashes;
4915 bfd_signed_vma *local_got_refcounts;
4916 const Elf_Internal_Rela *rel, *relend;
4917 asection *got2;
4918
4919 if (info->relocatable)
4920 return TRUE;
4921
4922 if ((sec->flags & SEC_ALLOC) == 0)
4923 return TRUE;
4924
4925 elf_section_data (sec)->local_dynrel = NULL;
4926
4927 htab = ppc_elf_hash_table (info);
4928 symtab_hdr = &elf_symtab_hdr (abfd);
4929 sym_hashes = elf_sym_hashes (abfd);
4930 local_got_refcounts = elf_local_got_refcounts (abfd);
4931 got2 = bfd_get_section_by_name (abfd, ".got2");
4932
4933 relend = relocs + sec->reloc_count;
4934 for (rel = relocs; rel < relend; rel++)
4935 {
4936 unsigned long r_symndx;
4937 enum elf_ppc_reloc_type r_type;
4938 struct elf_link_hash_entry *h = NULL;
4939
4940 r_symndx = ELF32_R_SYM (rel->r_info);
4941 if (r_symndx >= symtab_hdr->sh_info)
4942 {
4943 struct elf_dyn_relocs **pp, *p;
4944 struct ppc_elf_link_hash_entry *eh;
4945
4946 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4947 while (h->root.type == bfd_link_hash_indirect
4948 || h->root.type == bfd_link_hash_warning)
4949 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4950 eh = (struct ppc_elf_link_hash_entry *) h;
4951
4952 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4953 if (p->sec == sec)
4954 {
4955 /* Everything must go for SEC. */
4956 *pp = p->next;
4957 break;
4958 }
4959 }
4960
4961 r_type = ELF32_R_TYPE (rel->r_info);
4962 if (!htab->is_vxworks
4963 && h == NULL
4964 && local_got_refcounts != NULL
4965 && (!info->shared
4966 || is_branch_reloc (r_type)))
4967 {
4968 struct plt_entry **local_plt = (struct plt_entry **)
4969 (local_got_refcounts + symtab_hdr->sh_info);
4970 char *local_got_tls_masks = (char *)
4971 (local_plt + symtab_hdr->sh_info);
4972 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4973 {
4974 struct plt_entry **ifunc = local_plt + r_symndx;
4975 bfd_vma addend = 0;
4976 struct plt_entry *ent;
4977
4978 if (r_type == R_PPC_PLTREL24 && info->shared)
4979 addend = rel->r_addend;
4980 ent = find_plt_ent (ifunc, got2, addend);
4981 if (ent->plt.refcount > 0)
4982 ent->plt.refcount -= 1;
4983 continue;
4984 }
4985 }
4986
4987 switch (r_type)
4988 {
4989 case R_PPC_GOT_TLSLD16:
4990 case R_PPC_GOT_TLSLD16_LO:
4991 case R_PPC_GOT_TLSLD16_HI:
4992 case R_PPC_GOT_TLSLD16_HA:
4993 case R_PPC_GOT_TLSGD16:
4994 case R_PPC_GOT_TLSGD16_LO:
4995 case R_PPC_GOT_TLSGD16_HI:
4996 case R_PPC_GOT_TLSGD16_HA:
4997 case R_PPC_GOT_TPREL16:
4998 case R_PPC_GOT_TPREL16_LO:
4999 case R_PPC_GOT_TPREL16_HI:
5000 case R_PPC_GOT_TPREL16_HA:
5001 case R_PPC_GOT_DTPREL16:
5002 case R_PPC_GOT_DTPREL16_LO:
5003 case R_PPC_GOT_DTPREL16_HI:
5004 case R_PPC_GOT_DTPREL16_HA:
5005 case R_PPC_GOT16:
5006 case R_PPC_GOT16_LO:
5007 case R_PPC_GOT16_HI:
5008 case R_PPC_GOT16_HA:
5009 if (h != NULL)
5010 {
5011 if (h->got.refcount > 0)
5012 h->got.refcount--;
5013 if (!info->shared)
5014 {
5015 struct plt_entry *ent;
5016
5017 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5018 if (ent != NULL && ent->plt.refcount > 0)
5019 ent->plt.refcount -= 1;
5020 }
5021 }
5022 else if (local_got_refcounts != NULL)
5023 {
5024 if (local_got_refcounts[r_symndx] > 0)
5025 local_got_refcounts[r_symndx]--;
5026 }
5027 break;
5028
5029 case R_PPC_REL24:
5030 case R_PPC_REL14:
5031 case R_PPC_REL14_BRTAKEN:
5032 case R_PPC_REL14_BRNTAKEN:
5033 case R_PPC_REL32:
5034 if (h == NULL || h == htab->elf.hgot)
5035 break;
5036 /* Fall thru */
5037
5038 case R_PPC_ADDR32:
5039 case R_PPC_ADDR24:
5040 case R_PPC_ADDR16:
5041 case R_PPC_ADDR16_LO:
5042 case R_PPC_ADDR16_HI:
5043 case R_PPC_ADDR16_HA:
5044 case R_PPC_ADDR14:
5045 case R_PPC_ADDR14_BRTAKEN:
5046 case R_PPC_ADDR14_BRNTAKEN:
5047 case R_PPC_UADDR32:
5048 case R_PPC_UADDR16:
5049 if (info->shared)
5050 break;
5051
5052 case R_PPC_PLT32:
5053 case R_PPC_PLTREL24:
5054 case R_PPC_PLTREL32:
5055 case R_PPC_PLT16_LO:
5056 case R_PPC_PLT16_HI:
5057 case R_PPC_PLT16_HA:
5058 if (h != NULL)
5059 {
5060 bfd_vma addend = 0;
5061 struct plt_entry *ent;
5062
5063 if (r_type == R_PPC_PLTREL24 && info->shared)
5064 addend = rel->r_addend;
5065 ent = find_plt_ent (&h->plt.plist, got2, addend);
5066 if (ent != NULL && ent->plt.refcount > 0)
5067 ent->plt.refcount -= 1;
5068 }
5069 break;
5070
5071 default:
5072 break;
5073 }
5074 }
5075 return TRUE;
5076 }
5077 \f
5078 /* Set plt output section type, htab->tls_get_addr, and call the
5079 generic ELF tls_setup function. */
5080
5081 asection *
5082 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5083 {
5084 struct ppc_elf_link_hash_table *htab;
5085
5086 htab = ppc_elf_hash_table (info);
5087 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5088 FALSE, FALSE, TRUE);
5089 if (!htab->params->no_tls_get_addr_opt)
5090 {
5091 struct elf_link_hash_entry *opt, *tga;
5092 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5093 FALSE, FALSE, TRUE);
5094 if (opt != NULL
5095 && (opt->root.type == bfd_link_hash_defined
5096 || opt->root.type == bfd_link_hash_defweak))
5097 {
5098 /* If glibc supports an optimized __tls_get_addr call stub,
5099 signalled by the presence of __tls_get_addr_opt, and we'll
5100 be calling __tls_get_addr via a plt call stub, then
5101 make __tls_get_addr point to __tls_get_addr_opt. */
5102 tga = htab->tls_get_addr;
5103 if (htab->elf.dynamic_sections_created
5104 && tga != NULL
5105 && (tga->type == STT_FUNC
5106 || tga->needs_plt)
5107 && !(SYMBOL_CALLS_LOCAL (info, tga)
5108 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5109 && tga->root.type == bfd_link_hash_undefweak)))
5110 {
5111 struct plt_entry *ent;
5112 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5113 if (ent->plt.refcount > 0)
5114 break;
5115 if (ent != NULL)
5116 {
5117 tga->root.type = bfd_link_hash_indirect;
5118 tga->root.u.i.link = &opt->root;
5119 ppc_elf_copy_indirect_symbol (info, opt, tga);
5120 if (opt->dynindx != -1)
5121 {
5122 /* Use __tls_get_addr_opt in dynamic relocations. */
5123 opt->dynindx = -1;
5124 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5125 opt->dynstr_index);
5126 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5127 return FALSE;
5128 }
5129 htab->tls_get_addr = opt;
5130 }
5131 }
5132 }
5133 else
5134 htab->params->no_tls_get_addr_opt = TRUE;
5135 }
5136 if (htab->plt_type == PLT_NEW
5137 && htab->plt != NULL
5138 && htab->plt->output_section != NULL)
5139 {
5140 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5141 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5142 }
5143
5144 return _bfd_elf_tls_setup (obfd, info);
5145 }
5146
5147 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5148 HASH. */
5149
5150 static bfd_boolean
5151 branch_reloc_hash_match (const bfd *ibfd,
5152 const Elf_Internal_Rela *rel,
5153 const struct elf_link_hash_entry *hash)
5154 {
5155 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5156 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5157 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5158
5159 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5160 {
5161 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5162 struct elf_link_hash_entry *h;
5163
5164 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5165 while (h->root.type == bfd_link_hash_indirect
5166 || h->root.type == bfd_link_hash_warning)
5167 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5168 if (h == hash)
5169 return TRUE;
5170 }
5171 return FALSE;
5172 }
5173
5174 /* Run through all the TLS relocs looking for optimization
5175 opportunities. */
5176
5177 bfd_boolean
5178 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5179 struct bfd_link_info *info)
5180 {
5181 bfd *ibfd;
5182 asection *sec;
5183 struct ppc_elf_link_hash_table *htab;
5184 int pass;
5185
5186 if (info->relocatable || !info->executable)
5187 return TRUE;
5188
5189 htab = ppc_elf_hash_table (info);
5190 if (htab == NULL)
5191 return FALSE;
5192
5193 /* Make two passes through the relocs. First time check that tls
5194 relocs involved in setting up a tls_get_addr call are indeed
5195 followed by such a call. If they are not, don't do any tls
5196 optimization. On the second pass twiddle tls_mask flags to
5197 notify relocate_section that optimization can be done, and
5198 adjust got and plt refcounts. */
5199 for (pass = 0; pass < 2; ++pass)
5200 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5201 {
5202 Elf_Internal_Sym *locsyms = NULL;
5203 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5204 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5205
5206 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5207 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5208 {
5209 Elf_Internal_Rela *relstart, *rel, *relend;
5210 int expecting_tls_get_addr = 0;
5211
5212 /* Read the relocations. */
5213 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5214 info->keep_memory);
5215 if (relstart == NULL)
5216 return FALSE;
5217
5218 relend = relstart + sec->reloc_count;
5219 for (rel = relstart; rel < relend; rel++)
5220 {
5221 enum elf_ppc_reloc_type r_type;
5222 unsigned long r_symndx;
5223 struct elf_link_hash_entry *h = NULL;
5224 char *tls_mask;
5225 char tls_set, tls_clear;
5226 bfd_boolean is_local;
5227 bfd_signed_vma *got_count;
5228
5229 r_symndx = ELF32_R_SYM (rel->r_info);
5230 if (r_symndx >= symtab_hdr->sh_info)
5231 {
5232 struct elf_link_hash_entry **sym_hashes;
5233
5234 sym_hashes = elf_sym_hashes (ibfd);
5235 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5236 while (h->root.type == bfd_link_hash_indirect
5237 || h->root.type == bfd_link_hash_warning)
5238 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5239 }
5240
5241 is_local = FALSE;
5242 if (h == NULL
5243 || !h->def_dynamic)
5244 is_local = TRUE;
5245
5246 r_type = ELF32_R_TYPE (rel->r_info);
5247 /* If this section has old-style __tls_get_addr calls
5248 without marker relocs, then check that each
5249 __tls_get_addr call reloc is preceded by a reloc
5250 that conceivably belongs to the __tls_get_addr arg
5251 setup insn. If we don't find matching arg setup
5252 relocs, don't do any tls optimization. */
5253 if (pass == 0
5254 && sec->has_tls_get_addr_call
5255 && h != NULL
5256 && h == htab->tls_get_addr
5257 && !expecting_tls_get_addr
5258 && is_branch_reloc (r_type))
5259 {
5260 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5261 "TLS optimization disabled\n",
5262 ibfd, sec, rel->r_offset);
5263 if (elf_section_data (sec)->relocs != relstart)
5264 free (relstart);
5265 return TRUE;
5266 }
5267
5268 expecting_tls_get_addr = 0;
5269 switch (r_type)
5270 {
5271 case R_PPC_GOT_TLSLD16:
5272 case R_PPC_GOT_TLSLD16_LO:
5273 expecting_tls_get_addr = 1;
5274 /* Fall thru */
5275
5276 case R_PPC_GOT_TLSLD16_HI:
5277 case R_PPC_GOT_TLSLD16_HA:
5278 /* These relocs should never be against a symbol
5279 defined in a shared lib. Leave them alone if
5280 that turns out to be the case. */
5281 if (!is_local)
5282 continue;
5283
5284 /* LD -> LE */
5285 tls_set = 0;
5286 tls_clear = TLS_LD;
5287 break;
5288
5289 case R_PPC_GOT_TLSGD16:
5290 case R_PPC_GOT_TLSGD16_LO:
5291 expecting_tls_get_addr = 1;
5292 /* Fall thru */
5293
5294 case R_PPC_GOT_TLSGD16_HI:
5295 case R_PPC_GOT_TLSGD16_HA:
5296 if (is_local)
5297 /* GD -> LE */
5298 tls_set = 0;
5299 else
5300 /* GD -> IE */
5301 tls_set = TLS_TLS | TLS_TPRELGD;
5302 tls_clear = TLS_GD;
5303 break;
5304
5305 case R_PPC_GOT_TPREL16:
5306 case R_PPC_GOT_TPREL16_LO:
5307 case R_PPC_GOT_TPREL16_HI:
5308 case R_PPC_GOT_TPREL16_HA:
5309 if (is_local)
5310 {
5311 /* IE -> LE */
5312 tls_set = 0;
5313 tls_clear = TLS_TPREL;
5314 break;
5315 }
5316 else
5317 continue;
5318
5319 case R_PPC_TLSGD:
5320 case R_PPC_TLSLD:
5321 expecting_tls_get_addr = 2;
5322 tls_set = 0;
5323 tls_clear = 0;
5324 break;
5325
5326 default:
5327 continue;
5328 }
5329
5330 if (pass == 0)
5331 {
5332 if (!expecting_tls_get_addr
5333 || (expecting_tls_get_addr == 1
5334 && !sec->has_tls_get_addr_call))
5335 continue;
5336
5337 if (rel + 1 < relend
5338 && branch_reloc_hash_match (ibfd, rel + 1,
5339 htab->tls_get_addr))
5340 continue;
5341
5342 /* Uh oh, we didn't find the expected call. We
5343 could just mark this symbol to exclude it
5344 from tls optimization but it's safer to skip
5345 the entire optimization. */
5346 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5347 "TLS optimization disabled\n"),
5348 ibfd, sec, rel->r_offset);
5349 if (elf_section_data (sec)->relocs != relstart)
5350 free (relstart);
5351 return TRUE;
5352 }
5353
5354 if (expecting_tls_get_addr)
5355 {
5356 struct plt_entry *ent;
5357 bfd_vma addend = 0;
5358
5359 if (info->shared
5360 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5361 addend = rel[1].r_addend;
5362 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5363 got2, addend);
5364 if (ent != NULL && ent->plt.refcount > 0)
5365 ent->plt.refcount -= 1;
5366
5367 if (expecting_tls_get_addr == 2)
5368 continue;
5369 }
5370
5371 if (h != NULL)
5372 {
5373 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5374 got_count = &h->got.refcount;
5375 }
5376 else
5377 {
5378 bfd_signed_vma *lgot_refs;
5379 struct plt_entry **local_plt;
5380 char *lgot_masks;
5381
5382 if (locsyms == NULL)
5383 {
5384 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5385 if (locsyms == NULL)
5386 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5387 symtab_hdr->sh_info,
5388 0, NULL, NULL, NULL);
5389 if (locsyms == NULL)
5390 {
5391 if (elf_section_data (sec)->relocs != relstart)
5392 free (relstart);
5393 return FALSE;
5394 }
5395 }
5396 lgot_refs = elf_local_got_refcounts (ibfd);
5397 if (lgot_refs == NULL)
5398 abort ();
5399 local_plt = (struct plt_entry **)
5400 (lgot_refs + symtab_hdr->sh_info);
5401 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5402 tls_mask = &lgot_masks[r_symndx];
5403 got_count = &lgot_refs[r_symndx];
5404 }
5405
5406 if (tls_set == 0)
5407 {
5408 /* We managed to get rid of a got entry. */
5409 if (*got_count > 0)
5410 *got_count -= 1;
5411 }
5412
5413 *tls_mask |= tls_set;
5414 *tls_mask &= ~tls_clear;
5415 }
5416
5417 if (elf_section_data (sec)->relocs != relstart)
5418 free (relstart);
5419 }
5420
5421 if (locsyms != NULL
5422 && (symtab_hdr->contents != (unsigned char *) locsyms))
5423 {
5424 if (!info->keep_memory)
5425 free (locsyms);
5426 else
5427 symtab_hdr->contents = (unsigned char *) locsyms;
5428 }
5429 }
5430 return TRUE;
5431 }
5432 \f
5433 /* Return true if we have dynamic relocs that apply to read-only sections. */
5434
5435 static bfd_boolean
5436 readonly_dynrelocs (struct elf_link_hash_entry *h)
5437 {
5438 struct elf_dyn_relocs *p;
5439
5440 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5441 {
5442 asection *s = p->sec->output_section;
5443
5444 if (s != NULL
5445 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5446 == (SEC_READONLY | SEC_ALLOC)))
5447 return TRUE;
5448 }
5449 return FALSE;
5450 }
5451
5452 /* Adjust a symbol defined by a dynamic object and referenced by a
5453 regular object. The current definition is in some section of the
5454 dynamic object, but we're not including those sections. We have to
5455 change the definition to something the rest of the link can
5456 understand. */
5457
5458 static bfd_boolean
5459 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5460 struct elf_link_hash_entry *h)
5461 {
5462 struct ppc_elf_link_hash_table *htab;
5463 asection *s;
5464
5465 #ifdef DEBUG
5466 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5467 h->root.root.string);
5468 #endif
5469
5470 /* Make sure we know what is going on here. */
5471 htab = ppc_elf_hash_table (info);
5472 BFD_ASSERT (htab->elf.dynobj != NULL
5473 && (h->needs_plt
5474 || h->type == STT_GNU_IFUNC
5475 || h->u.weakdef != NULL
5476 || (h->def_dynamic
5477 && h->ref_regular
5478 && !h->def_regular)));
5479
5480 /* Deal with function syms. */
5481 if (h->type == STT_FUNC
5482 || h->type == STT_GNU_IFUNC
5483 || h->needs_plt)
5484 {
5485 /* Clear procedure linkage table information for any symbol that
5486 won't need a .plt entry. */
5487 struct plt_entry *ent;
5488 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5489 if (ent->plt.refcount > 0)
5490 break;
5491 if (ent == NULL
5492 || (h->type != STT_GNU_IFUNC
5493 && (SYMBOL_CALLS_LOCAL (info, h)
5494 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5495 && h->root.type == bfd_link_hash_undefweak))))
5496 {
5497 /* A PLT entry is not required/allowed when:
5498
5499 1. We are not using ld.so; because then the PLT entry
5500 can't be set up, so we can't use one. In this case,
5501 ppc_elf_adjust_dynamic_symbol won't even be called.
5502
5503 2. GC has rendered the entry unused.
5504
5505 3. We know for certain that a call to this symbol
5506 will go to this object, or will remain undefined. */
5507 h->plt.plist = NULL;
5508 h->needs_plt = 0;
5509 }
5510 else
5511 {
5512 /* After adjust_dynamic_symbol, non_got_ref set in the
5513 non-shared case means that we have allocated space in
5514 .dynbss for the symbol and thus dyn_relocs for this
5515 symbol should be discarded.
5516 If we get here we know we are making a PLT entry for this
5517 symbol, and in an executable we'd normally resolve
5518 relocations against this symbol to the PLT entry. Allow
5519 dynamic relocs if the reference is weak, and the dynamic
5520 relocs will not cause text relocation. */
5521 if (!h->ref_regular_nonweak
5522 && h->non_got_ref
5523 && h->type != STT_GNU_IFUNC
5524 && !htab->is_vxworks
5525 && !ppc_elf_hash_entry (h)->has_sda_refs
5526 && !readonly_dynrelocs (h))
5527 h->non_got_ref = 0;
5528 }
5529 return TRUE;
5530 }
5531 else
5532 h->plt.plist = NULL;
5533
5534 /* If this is a weak symbol, and there is a real definition, the
5535 processor independent code will have arranged for us to see the
5536 real definition first, and we can just use the same value. */
5537 if (h->u.weakdef != NULL)
5538 {
5539 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5540 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5541 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5542 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5543 if (ELIMINATE_COPY_RELOCS)
5544 h->non_got_ref = h->u.weakdef->non_got_ref;
5545 return TRUE;
5546 }
5547
5548 /* This is a reference to a symbol defined by a dynamic object which
5549 is not a function. */
5550
5551 /* If we are creating a shared library, we must presume that the
5552 only references to the symbol are via the global offset table.
5553 For such cases we need not do anything here; the relocations will
5554 be handled correctly by relocate_section. */
5555 if (info->shared)
5556 return TRUE;
5557
5558 /* If there are no references to this symbol that do not use the
5559 GOT, we don't need to generate a copy reloc. */
5560 if (!h->non_got_ref)
5561 return TRUE;
5562
5563 /* If we didn't find any dynamic relocs in read-only sections, then
5564 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5565 We can't do this if there are any small data relocations. This
5566 doesn't work on VxWorks, where we can not have dynamic
5567 relocations (other than copy and jump slot relocations) in an
5568 executable. */
5569 if (ELIMINATE_COPY_RELOCS
5570 && !ppc_elf_hash_entry (h)->has_sda_refs
5571 && !htab->is_vxworks
5572 && !h->def_regular
5573 && !readonly_dynrelocs (h))
5574 {
5575 h->non_got_ref = 0;
5576 return TRUE;
5577 }
5578
5579 /* We must allocate the symbol in our .dynbss section, which will
5580 become part of the .bss section of the executable. There will be
5581 an entry for this symbol in the .dynsym section. The dynamic
5582 object will contain position independent code, so all references
5583 from the dynamic object to this symbol will go through the global
5584 offset table. The dynamic linker will use the .dynsym entry to
5585 determine the address it must put in the global offset table, so
5586 both the dynamic object and the regular object will refer to the
5587 same memory location for the variable.
5588
5589 Of course, if the symbol is referenced using SDAREL relocs, we
5590 must instead allocate it in .sbss. */
5591
5592 if (ppc_elf_hash_entry (h)->has_sda_refs)
5593 s = htab->dynsbss;
5594 else
5595 s = htab->dynbss;
5596 BFD_ASSERT (s != NULL);
5597
5598 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5599 copy the initial value out of the dynamic object and into the
5600 runtime process image. We need to remember the offset into the
5601 .rela.bss section we are going to use. */
5602 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5603 {
5604 asection *srel;
5605
5606 if (ppc_elf_hash_entry (h)->has_sda_refs)
5607 srel = htab->relsbss;
5608 else
5609 srel = htab->relbss;
5610 BFD_ASSERT (srel != NULL);
5611 srel->size += sizeof (Elf32_External_Rela);
5612 h->needs_copy = 1;
5613 }
5614
5615 return _bfd_elf_adjust_dynamic_copy (h, s);
5616 }
5617 \f
5618 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5619 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5620 specifying the addend on the plt relocation. For -fpic code, the sym
5621 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5622 xxxxxxxx.got2.plt_pic32.<callee>. */
5623
5624 static bfd_boolean
5625 add_stub_sym (struct plt_entry *ent,
5626 struct elf_link_hash_entry *h,
5627 struct bfd_link_info *info)
5628 {
5629 struct elf_link_hash_entry *sh;
5630 size_t len1, len2, len3;
5631 char *name;
5632 const char *stub;
5633 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5634
5635 if (info->shared)
5636 stub = ".plt_pic32.";
5637 else
5638 stub = ".plt_call32.";
5639
5640 len1 = strlen (h->root.root.string);
5641 len2 = strlen (stub);
5642 len3 = 0;
5643 if (ent->sec)
5644 len3 = strlen (ent->sec->name);
5645 name = bfd_malloc (len1 + len2 + len3 + 9);
5646 if (name == NULL)
5647 return FALSE;
5648 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5649 if (ent->sec)
5650 memcpy (name + 8, ent->sec->name, len3);
5651 memcpy (name + 8 + len3, stub, len2);
5652 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5653 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5654 if (sh == NULL)
5655 return FALSE;
5656 if (sh->root.type == bfd_link_hash_new)
5657 {
5658 sh->root.type = bfd_link_hash_defined;
5659 sh->root.u.def.section = htab->glink;
5660 sh->root.u.def.value = ent->glink_offset;
5661 sh->ref_regular = 1;
5662 sh->def_regular = 1;
5663 sh->ref_regular_nonweak = 1;
5664 sh->forced_local = 1;
5665 sh->non_elf = 0;
5666 }
5667 return TRUE;
5668 }
5669
5670 /* Allocate NEED contiguous space in .got, and return the offset.
5671 Handles allocation of the got header when crossing 32k. */
5672
5673 static bfd_vma
5674 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5675 {
5676 bfd_vma where;
5677 unsigned int max_before_header;
5678
5679 if (htab->plt_type == PLT_VXWORKS)
5680 {
5681 where = htab->got->size;
5682 htab->got->size += need;
5683 }
5684 else
5685 {
5686 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5687 if (need <= htab->got_gap)
5688 {
5689 where = max_before_header - htab->got_gap;
5690 htab->got_gap -= need;
5691 }
5692 else
5693 {
5694 if (htab->got->size + need > max_before_header
5695 && htab->got->size <= max_before_header)
5696 {
5697 htab->got_gap = max_before_header - htab->got->size;
5698 htab->got->size = max_before_header + htab->got_header_size;
5699 }
5700 where = htab->got->size;
5701 htab->got->size += need;
5702 }
5703 }
5704 return where;
5705 }
5706
5707 /* Allocate space in associated reloc sections for dynamic relocs. */
5708
5709 static bfd_boolean
5710 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5711 {
5712 struct bfd_link_info *info = inf;
5713 struct ppc_elf_link_hash_entry *eh;
5714 struct ppc_elf_link_hash_table *htab;
5715 struct elf_dyn_relocs *p;
5716
5717 if (h->root.type == bfd_link_hash_indirect)
5718 return TRUE;
5719
5720 htab = ppc_elf_hash_table (info);
5721 if (htab->elf.dynamic_sections_created
5722 || h->type == STT_GNU_IFUNC)
5723 {
5724 struct plt_entry *ent;
5725 bfd_boolean doneone = FALSE;
5726 bfd_vma plt_offset = 0, glink_offset = 0;
5727 bfd_boolean dyn;
5728
5729 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5730 if (ent->plt.refcount > 0)
5731 {
5732 /* Make sure this symbol is output as a dynamic symbol. */
5733 if (h->dynindx == -1
5734 && !h->forced_local
5735 && !h->def_regular
5736 && htab->elf.dynamic_sections_created)
5737 {
5738 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5739 return FALSE;
5740 }
5741
5742 dyn = htab->elf.dynamic_sections_created;
5743 if (info->shared
5744 || h->type == STT_GNU_IFUNC
5745 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5746 {
5747 asection *s = htab->plt;
5748 if (!dyn || h->dynindx == -1)
5749 s = htab->iplt;
5750
5751 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5752 {
5753 if (!doneone)
5754 {
5755 plt_offset = s->size;
5756 s->size += 4;
5757 }
5758 ent->plt.offset = plt_offset;
5759
5760 s = htab->glink;
5761 if (!doneone || info->shared)
5762 {
5763 glink_offset = s->size;
5764 s->size += GLINK_ENTRY_SIZE;
5765 if (h == htab->tls_get_addr
5766 && !htab->params->no_tls_get_addr_opt)
5767 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5768 }
5769 if (!doneone
5770 && !info->shared
5771 && h->def_dynamic
5772 && !h->def_regular)
5773 {
5774 h->root.u.def.section = s;
5775 h->root.u.def.value = glink_offset;
5776 }
5777 ent->glink_offset = glink_offset;
5778
5779 if (htab->params->emit_stub_syms
5780 && !add_stub_sym (ent, h, info))
5781 return FALSE;
5782 }
5783 else
5784 {
5785 if (!doneone)
5786 {
5787 /* If this is the first .plt entry, make room
5788 for the special first entry. */
5789 if (s->size == 0)
5790 s->size += htab->plt_initial_entry_size;
5791
5792 /* The PowerPC PLT is actually composed of two
5793 parts, the first part is 2 words (for a load
5794 and a jump), and then there is a remaining
5795 word available at the end. */
5796 plt_offset = (htab->plt_initial_entry_size
5797 + (htab->plt_slot_size
5798 * ((s->size
5799 - htab->plt_initial_entry_size)
5800 / htab->plt_entry_size)));
5801
5802 /* If this symbol is not defined in a regular
5803 file, and we are not generating a shared
5804 library, then set the symbol to this location
5805 in the .plt. This is to avoid text
5806 relocations, and is required to make
5807 function pointers compare as equal between
5808 the normal executable and the shared library. */
5809 if (! info->shared
5810 && h->def_dynamic
5811 && !h->def_regular)
5812 {
5813 h->root.u.def.section = s;
5814 h->root.u.def.value = plt_offset;
5815 }
5816
5817 /* Make room for this entry. */
5818 s->size += htab->plt_entry_size;
5819 /* After the 8192nd entry, room for two entries
5820 is allocated. */
5821 if (htab->plt_type == PLT_OLD
5822 && (s->size - htab->plt_initial_entry_size)
5823 / htab->plt_entry_size
5824 > PLT_NUM_SINGLE_ENTRIES)
5825 s->size += htab->plt_entry_size;
5826 }
5827 ent->plt.offset = plt_offset;
5828 }
5829
5830 /* We also need to make an entry in the .rela.plt section. */
5831 if (!doneone)
5832 {
5833 if (!htab->elf.dynamic_sections_created
5834 || h->dynindx == -1)
5835 htab->reliplt->size += sizeof (Elf32_External_Rela);
5836 else
5837 {
5838 htab->relplt->size += sizeof (Elf32_External_Rela);
5839
5840 if (htab->plt_type == PLT_VXWORKS)
5841 {
5842 /* Allocate space for the unloaded relocations. */
5843 if (!info->shared
5844 && htab->elf.dynamic_sections_created)
5845 {
5846 if (ent->plt.offset
5847 == (bfd_vma) htab->plt_initial_entry_size)
5848 {
5849 htab->srelplt2->size
5850 += (sizeof (Elf32_External_Rela)
5851 * VXWORKS_PLTRESOLVE_RELOCS);
5852 }
5853
5854 htab->srelplt2->size
5855 += (sizeof (Elf32_External_Rela)
5856 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5857 }
5858
5859 /* Every PLT entry has an associated GOT entry in
5860 .got.plt. */
5861 htab->sgotplt->size += 4;
5862 }
5863 }
5864 doneone = TRUE;
5865 }
5866 }
5867 else
5868 ent->plt.offset = (bfd_vma) -1;
5869 }
5870 else
5871 ent->plt.offset = (bfd_vma) -1;
5872
5873 if (!doneone)
5874 {
5875 h->plt.plist = NULL;
5876 h->needs_plt = 0;
5877 }
5878 }
5879 else
5880 {
5881 h->plt.plist = NULL;
5882 h->needs_plt = 0;
5883 }
5884
5885 eh = (struct ppc_elf_link_hash_entry *) h;
5886 if (eh->elf.got.refcount > 0)
5887 {
5888 bfd_boolean dyn;
5889 unsigned int need;
5890
5891 /* Make sure this symbol is output as a dynamic symbol. */
5892 if (eh->elf.dynindx == -1
5893 && !eh->elf.forced_local
5894 && eh->elf.type != STT_GNU_IFUNC
5895 && htab->elf.dynamic_sections_created)
5896 {
5897 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5898 return FALSE;
5899 }
5900
5901 need = 0;
5902 if ((eh->tls_mask & TLS_TLS) != 0)
5903 {
5904 if ((eh->tls_mask & TLS_LD) != 0)
5905 {
5906 if (!eh->elf.def_dynamic)
5907 /* We'll just use htab->tlsld_got.offset. This should
5908 always be the case. It's a little odd if we have
5909 a local dynamic reloc against a non-local symbol. */
5910 htab->tlsld_got.refcount += 1;
5911 else
5912 need += 8;
5913 }
5914 if ((eh->tls_mask & TLS_GD) != 0)
5915 need += 8;
5916 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5917 need += 4;
5918 if ((eh->tls_mask & TLS_DTPREL) != 0)
5919 need += 4;
5920 }
5921 else
5922 need += 4;
5923 if (need == 0)
5924 eh->elf.got.offset = (bfd_vma) -1;
5925 else
5926 {
5927 eh->elf.got.offset = allocate_got (htab, need);
5928 dyn = htab->elf.dynamic_sections_created;
5929 if ((info->shared
5930 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5931 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5932 || eh->elf.root.type != bfd_link_hash_undefweak))
5933 {
5934 asection *rsec = htab->relgot;
5935
5936 if (eh->elf.type == STT_GNU_IFUNC)
5937 rsec = htab->reliplt;
5938 /* All the entries we allocated need relocs.
5939 Except LD only needs one. */
5940 if ((eh->tls_mask & TLS_LD) != 0
5941 && eh->elf.def_dynamic)
5942 need -= 4;
5943 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5944 }
5945 }
5946 }
5947 else
5948 eh->elf.got.offset = (bfd_vma) -1;
5949
5950 if (eh->dyn_relocs == NULL
5951 || !htab->elf.dynamic_sections_created)
5952 return TRUE;
5953
5954 /* In the shared -Bsymbolic case, discard space allocated for
5955 dynamic pc-relative relocs against symbols which turn out to be
5956 defined in regular objects. For the normal shared case, discard
5957 space for relocs that have become local due to symbol visibility
5958 changes. */
5959
5960 if (info->shared)
5961 {
5962 /* Relocs that use pc_count are those that appear on a call insn,
5963 or certain REL relocs (see must_be_dyn_reloc) that can be
5964 generated via assembly. We want calls to protected symbols to
5965 resolve directly to the function rather than going via the plt.
5966 If people want function pointer comparisons to work as expected
5967 then they should avoid writing weird assembly. */
5968 if (SYMBOL_CALLS_LOCAL (info, h))
5969 {
5970 struct elf_dyn_relocs **pp;
5971
5972 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5973 {
5974 p->count -= p->pc_count;
5975 p->pc_count = 0;
5976 if (p->count == 0)
5977 *pp = p->next;
5978 else
5979 pp = &p->next;
5980 }
5981 }
5982
5983 if (htab->is_vxworks)
5984 {
5985 struct elf_dyn_relocs **pp;
5986
5987 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5988 {
5989 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5990 *pp = p->next;
5991 else
5992 pp = &p->next;
5993 }
5994 }
5995
5996 /* Discard relocs on undefined symbols that must be local. */
5997 if (eh->dyn_relocs != NULL
5998 && h->root.type == bfd_link_hash_undefined
5999 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6000 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6001 eh->dyn_relocs = NULL;
6002
6003 /* Also discard relocs on undefined weak syms with non-default
6004 visibility. */
6005 if (eh->dyn_relocs != NULL
6006 && h->root.type == bfd_link_hash_undefweak)
6007 {
6008 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6009 eh->dyn_relocs = NULL;
6010
6011 /* Make sure undefined weak symbols are output as a dynamic
6012 symbol in PIEs. */
6013 else if (h->dynindx == -1
6014 && !h->forced_local
6015 && !h->def_regular)
6016 {
6017 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6018 return FALSE;
6019 }
6020 }
6021 }
6022 else if (ELIMINATE_COPY_RELOCS)
6023 {
6024 /* For the non-shared case, discard space for relocs against
6025 symbols which turn out to need copy relocs or are not
6026 dynamic. */
6027
6028 if (!h->non_got_ref
6029 && !h->def_regular)
6030 {
6031 /* Make sure this symbol is output as a dynamic symbol.
6032 Undefined weak syms won't yet be marked as dynamic. */
6033 if (h->dynindx == -1
6034 && !h->forced_local)
6035 {
6036 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6037 return FALSE;
6038 }
6039
6040 /* If that succeeded, we know we'll be keeping all the
6041 relocs. */
6042 if (h->dynindx != -1)
6043 goto keep;
6044 }
6045
6046 eh->dyn_relocs = NULL;
6047
6048 keep: ;
6049 }
6050
6051 /* Finally, allocate space. */
6052 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6053 {
6054 asection *sreloc = elf_section_data (p->sec)->sreloc;
6055 if (eh->elf.type == STT_GNU_IFUNC)
6056 sreloc = htab->reliplt;
6057 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6058 }
6059
6060 return TRUE;
6061 }
6062
6063 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6064 read-only sections. */
6065
6066 static bfd_boolean
6067 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6068 {
6069 if (h->root.type == bfd_link_hash_indirect)
6070 return TRUE;
6071
6072 if (readonly_dynrelocs (h))
6073 {
6074 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6075
6076 /* Not an error, just cut short the traversal. */
6077 return FALSE;
6078 }
6079 return TRUE;
6080 }
6081
6082 static const unsigned char glink_eh_frame_cie[] =
6083 {
6084 0, 0, 0, 16, /* length. */
6085 0, 0, 0, 0, /* id. */
6086 1, /* CIE version. */
6087 'z', 'R', 0, /* Augmentation string. */
6088 4, /* Code alignment. */
6089 0x7c, /* Data alignment. */
6090 65, /* RA reg. */
6091 1, /* Augmentation size. */
6092 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6093 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6094 };
6095
6096 /* Set the sizes of the dynamic sections. */
6097
6098 static bfd_boolean
6099 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6100 struct bfd_link_info *info)
6101 {
6102 struct ppc_elf_link_hash_table *htab;
6103 asection *s;
6104 bfd_boolean relocs;
6105 bfd *ibfd;
6106
6107 #ifdef DEBUG
6108 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6109 #endif
6110
6111 htab = ppc_elf_hash_table (info);
6112 BFD_ASSERT (htab->elf.dynobj != NULL);
6113
6114 if (elf_hash_table (info)->dynamic_sections_created)
6115 {
6116 /* Set the contents of the .interp section to the interpreter. */
6117 if (info->executable)
6118 {
6119 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6120 BFD_ASSERT (s != NULL);
6121 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6122 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6123 }
6124 }
6125
6126 if (htab->plt_type == PLT_OLD)
6127 htab->got_header_size = 16;
6128 else if (htab->plt_type == PLT_NEW)
6129 htab->got_header_size = 12;
6130
6131 /* Set up .got offsets for local syms, and space for local dynamic
6132 relocs. */
6133 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6134 {
6135 bfd_signed_vma *local_got;
6136 bfd_signed_vma *end_local_got;
6137 struct plt_entry **local_plt;
6138 struct plt_entry **end_local_plt;
6139 char *lgot_masks;
6140 bfd_size_type locsymcount;
6141 Elf_Internal_Shdr *symtab_hdr;
6142
6143 if (!is_ppc_elf (ibfd))
6144 continue;
6145
6146 for (s = ibfd->sections; s != NULL; s = s->next)
6147 {
6148 struct ppc_dyn_relocs *p;
6149
6150 for (p = ((struct ppc_dyn_relocs *)
6151 elf_section_data (s)->local_dynrel);
6152 p != NULL;
6153 p = p->next)
6154 {
6155 if (!bfd_is_abs_section (p->sec)
6156 && bfd_is_abs_section (p->sec->output_section))
6157 {
6158 /* Input section has been discarded, either because
6159 it is a copy of a linkonce section or due to
6160 linker script /DISCARD/, so we'll be discarding
6161 the relocs too. */
6162 }
6163 else if (htab->is_vxworks
6164 && strcmp (p->sec->output_section->name,
6165 ".tls_vars") == 0)
6166 {
6167 /* Relocations in vxworks .tls_vars sections are
6168 handled specially by the loader. */
6169 }
6170 else if (p->count != 0)
6171 {
6172 asection *sreloc = elf_section_data (p->sec)->sreloc;
6173 if (p->ifunc)
6174 sreloc = htab->reliplt;
6175 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6176 if ((p->sec->output_section->flags
6177 & (SEC_READONLY | SEC_ALLOC))
6178 == (SEC_READONLY | SEC_ALLOC))
6179 info->flags |= DF_TEXTREL;
6180 }
6181 }
6182 }
6183
6184 local_got = elf_local_got_refcounts (ibfd);
6185 if (!local_got)
6186 continue;
6187
6188 symtab_hdr = &elf_symtab_hdr (ibfd);
6189 locsymcount = symtab_hdr->sh_info;
6190 end_local_got = local_got + locsymcount;
6191 local_plt = (struct plt_entry **) end_local_got;
6192 end_local_plt = local_plt + locsymcount;
6193 lgot_masks = (char *) end_local_plt;
6194
6195 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6196 if (*local_got > 0)
6197 {
6198 unsigned int need = 0;
6199 if ((*lgot_masks & TLS_TLS) != 0)
6200 {
6201 if ((*lgot_masks & TLS_GD) != 0)
6202 need += 8;
6203 if ((*lgot_masks & TLS_LD) != 0)
6204 htab->tlsld_got.refcount += 1;
6205 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6206 need += 4;
6207 if ((*lgot_masks & TLS_DTPREL) != 0)
6208 need += 4;
6209 }
6210 else
6211 need += 4;
6212 if (need == 0)
6213 *local_got = (bfd_vma) -1;
6214 else
6215 {
6216 *local_got = allocate_got (htab, need);
6217 if (info->shared)
6218 {
6219 asection *srel = htab->relgot;
6220 if ((*lgot_masks & PLT_IFUNC) != 0)
6221 srel = htab->reliplt;
6222 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6223 }
6224 }
6225 }
6226 else
6227 *local_got = (bfd_vma) -1;
6228
6229 if (htab->is_vxworks)
6230 continue;
6231
6232 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6233 for (; local_plt < end_local_plt; ++local_plt)
6234 {
6235 struct plt_entry *ent;
6236 bfd_boolean doneone = FALSE;
6237 bfd_vma plt_offset = 0, glink_offset = 0;
6238
6239 for (ent = *local_plt; ent != NULL; ent = ent->next)
6240 if (ent->plt.refcount > 0)
6241 {
6242 s = htab->iplt;
6243
6244 if (!doneone)
6245 {
6246 plt_offset = s->size;
6247 s->size += 4;
6248 }
6249 ent->plt.offset = plt_offset;
6250
6251 s = htab->glink;
6252 if (!doneone || info->shared)
6253 {
6254 glink_offset = s->size;
6255 s->size += GLINK_ENTRY_SIZE;
6256 }
6257 ent->glink_offset = glink_offset;
6258
6259 if (!doneone)
6260 {
6261 htab->reliplt->size += sizeof (Elf32_External_Rela);
6262 doneone = TRUE;
6263 }
6264 }
6265 else
6266 ent->plt.offset = (bfd_vma) -1;
6267 }
6268 }
6269
6270 /* Allocate space for global sym dynamic relocs. */
6271 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6272
6273 if (htab->tlsld_got.refcount > 0)
6274 {
6275 htab->tlsld_got.offset = allocate_got (htab, 8);
6276 if (info->shared)
6277 htab->relgot->size += sizeof (Elf32_External_Rela);
6278 }
6279 else
6280 htab->tlsld_got.offset = (bfd_vma) -1;
6281
6282 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6283 {
6284 unsigned int g_o_t = 32768;
6285
6286 /* If we haven't allocated the header, do so now. When we get here,
6287 for old plt/got the got size will be 0 to 32764 (not allocated),
6288 or 32780 to 65536 (header allocated). For new plt/got, the
6289 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6290 if (htab->got->size <= 32768)
6291 {
6292 g_o_t = htab->got->size;
6293 if (htab->plt_type == PLT_OLD)
6294 g_o_t += 4;
6295 htab->got->size += htab->got_header_size;
6296 }
6297
6298 htab->elf.hgot->root.u.def.value = g_o_t;
6299 }
6300 if (info->shared)
6301 {
6302 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6303
6304 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6305 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6306 }
6307 if (info->emitrelocations)
6308 {
6309 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6310
6311 if (sda != NULL && sda->ref_regular)
6312 sda->root.u.def.section->flags |= SEC_KEEP;
6313 sda = htab->sdata[1].sym;
6314 if (sda != NULL && sda->ref_regular)
6315 sda->root.u.def.section->flags |= SEC_KEEP;
6316 }
6317
6318 if (htab->glink != NULL
6319 && htab->glink->size != 0
6320 && htab->elf.dynamic_sections_created)
6321 {
6322 htab->glink_pltresolve = htab->glink->size;
6323 /* Space for the branch table. */
6324 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6325 /* Pad out to align the start of PLTresolve. */
6326 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6327 ? 63 : 15);
6328 htab->glink->size += GLINK_PLTRESOLVE;
6329
6330 if (htab->params->emit_stub_syms)
6331 {
6332 struct elf_link_hash_entry *sh;
6333 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6334 TRUE, FALSE, FALSE);
6335 if (sh == NULL)
6336 return FALSE;
6337 if (sh->root.type == bfd_link_hash_new)
6338 {
6339 sh->root.type = bfd_link_hash_defined;
6340 sh->root.u.def.section = htab->glink;
6341 sh->root.u.def.value = htab->glink_pltresolve;
6342 sh->ref_regular = 1;
6343 sh->def_regular = 1;
6344 sh->ref_regular_nonweak = 1;
6345 sh->forced_local = 1;
6346 sh->non_elf = 0;
6347 }
6348 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6349 TRUE, FALSE, FALSE);
6350 if (sh == NULL)
6351 return FALSE;
6352 if (sh->root.type == bfd_link_hash_new)
6353 {
6354 sh->root.type = bfd_link_hash_defined;
6355 sh->root.u.def.section = htab->glink;
6356 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6357 sh->ref_regular = 1;
6358 sh->def_regular = 1;
6359 sh->ref_regular_nonweak = 1;
6360 sh->forced_local = 1;
6361 sh->non_elf = 0;
6362 }
6363 }
6364 }
6365
6366 if (htab->glink != NULL
6367 && htab->glink->size != 0
6368 && htab->glink_eh_frame != NULL
6369 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6370 && _bfd_elf_eh_frame_present (info))
6371 {
6372 s = htab->glink_eh_frame;
6373 s->size = sizeof (glink_eh_frame_cie) + 20;
6374 if (info->shared)
6375 {
6376 s->size += 4;
6377 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6378 s->size += 4;
6379 }
6380 }
6381
6382 /* We've now determined the sizes of the various dynamic sections.
6383 Allocate memory for them. */
6384 relocs = FALSE;
6385 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6386 {
6387 bfd_boolean strip_section = TRUE;
6388
6389 if ((s->flags & SEC_LINKER_CREATED) == 0)
6390 continue;
6391
6392 if (s == htab->plt
6393 || s == htab->got)
6394 {
6395 /* We'd like to strip these sections if they aren't needed, but if
6396 we've exported dynamic symbols from them we must leave them.
6397 It's too late to tell BFD to get rid of the symbols. */
6398 if (htab->elf.hplt != NULL)
6399 strip_section = FALSE;
6400 /* Strip this section if we don't need it; see the
6401 comment below. */
6402 }
6403 else if (s == htab->iplt
6404 || s == htab->glink
6405 || s == htab->glink_eh_frame
6406 || s == htab->sgotplt
6407 || s == htab->sbss
6408 || s == htab->dynbss
6409 || s == htab->dynsbss)
6410 {
6411 /* Strip these too. */
6412 }
6413 else if (s == htab->sdata[0].section
6414 || s == htab->sdata[1].section)
6415 {
6416 strip_section = (s->flags & SEC_KEEP) == 0;
6417 }
6418 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6419 ".rela"))
6420 {
6421 if (s->size != 0)
6422 {
6423 /* Remember whether there are any relocation sections. */
6424 relocs = TRUE;
6425
6426 /* We use the reloc_count field as a counter if we need
6427 to copy relocs into the output file. */
6428 s->reloc_count = 0;
6429 }
6430 }
6431 else
6432 {
6433 /* It's not one of our sections, so don't allocate space. */
6434 continue;
6435 }
6436
6437 if (s->size == 0 && strip_section)
6438 {
6439 /* If we don't need this section, strip it from the
6440 output file. This is mostly to handle .rela.bss and
6441 .rela.plt. We must create both sections in
6442 create_dynamic_sections, because they must be created
6443 before the linker maps input sections to output
6444 sections. The linker does that before
6445 adjust_dynamic_symbol is called, and it is that
6446 function which decides whether anything needs to go
6447 into these sections. */
6448 s->flags |= SEC_EXCLUDE;
6449 continue;
6450 }
6451
6452 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6453 continue;
6454
6455 /* Allocate memory for the section contents. */
6456 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6457 if (s->contents == NULL)
6458 return FALSE;
6459 }
6460
6461 if (htab->elf.dynamic_sections_created)
6462 {
6463 /* Add some entries to the .dynamic section. We fill in the
6464 values later, in ppc_elf_finish_dynamic_sections, but we
6465 must add the entries now so that we get the correct size for
6466 the .dynamic section. The DT_DEBUG entry is filled in by the
6467 dynamic linker and used by the debugger. */
6468 #define add_dynamic_entry(TAG, VAL) \
6469 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6470
6471 if (info->executable)
6472 {
6473 if (!add_dynamic_entry (DT_DEBUG, 0))
6474 return FALSE;
6475 }
6476
6477 if (htab->plt != NULL && htab->plt->size != 0)
6478 {
6479 if (!add_dynamic_entry (DT_PLTGOT, 0)
6480 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6481 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6482 || !add_dynamic_entry (DT_JMPREL, 0))
6483 return FALSE;
6484 }
6485
6486 if (htab->plt_type == PLT_NEW
6487 && htab->glink != NULL
6488 && htab->glink->size != 0)
6489 {
6490 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6491 return FALSE;
6492 if (!htab->params->no_tls_get_addr_opt
6493 && htab->tls_get_addr != NULL
6494 && htab->tls_get_addr->plt.plist != NULL
6495 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6496 return FALSE;
6497 }
6498
6499 if (relocs)
6500 {
6501 if (!add_dynamic_entry (DT_RELA, 0)
6502 || !add_dynamic_entry (DT_RELASZ, 0)
6503 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6504 return FALSE;
6505 }
6506
6507 /* If any dynamic relocs apply to a read-only section, then we
6508 need a DT_TEXTREL entry. */
6509 if ((info->flags & DF_TEXTREL) == 0)
6510 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6511 info);
6512
6513 if ((info->flags & DF_TEXTREL) != 0)
6514 {
6515 if (!add_dynamic_entry (DT_TEXTREL, 0))
6516 return FALSE;
6517 }
6518 if (htab->is_vxworks
6519 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6520 return FALSE;
6521 }
6522 #undef add_dynamic_entry
6523
6524 if (htab->glink_eh_frame != NULL
6525 && htab->glink_eh_frame->contents != NULL)
6526 {
6527 unsigned char *p = htab->glink_eh_frame->contents;
6528 bfd_vma val;
6529
6530 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6531 /* CIE length (rewrite in case little-endian). */
6532 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6533 p += sizeof (glink_eh_frame_cie);
6534 /* FDE length. */
6535 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6536 bfd_put_32 (htab->elf.dynobj, val, p);
6537 p += 4;
6538 /* CIE pointer. */
6539 val = p - htab->glink_eh_frame->contents;
6540 bfd_put_32 (htab->elf.dynobj, val, p);
6541 p += 4;
6542 /* Offset to .glink. Set later. */
6543 p += 4;
6544 /* .glink size. */
6545 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6546 p += 4;
6547 /* Augmentation. */
6548 p += 1;
6549
6550 if (info->shared
6551 && htab->elf.dynamic_sections_created)
6552 {
6553 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6554 if (adv < 64)
6555 *p++ = DW_CFA_advance_loc + adv;
6556 else if (adv < 256)
6557 {
6558 *p++ = DW_CFA_advance_loc1;
6559 *p++ = adv;
6560 }
6561 else if (adv < 65536)
6562 {
6563 *p++ = DW_CFA_advance_loc2;
6564 bfd_put_16 (htab->elf.dynobj, adv, p);
6565 p += 2;
6566 }
6567 else
6568 {
6569 *p++ = DW_CFA_advance_loc4;
6570 bfd_put_32 (htab->elf.dynobj, adv, p);
6571 p += 4;
6572 }
6573 *p++ = DW_CFA_register;
6574 *p++ = 65;
6575 p++;
6576 *p++ = DW_CFA_advance_loc + 4;
6577 *p++ = DW_CFA_restore_extended;
6578 *p++ = 65;
6579 }
6580 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6581 == htab->glink_eh_frame->size);
6582 }
6583
6584 return TRUE;
6585 }
6586
6587 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6588 if it looks like nothing is using them. */
6589
6590 static void
6591 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6592 {
6593 struct elf_link_hash_entry *sda = lsect->sym;
6594
6595 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6596 {
6597 asection *s;
6598
6599 s = bfd_get_section_by_name (output_bfd, lsect->name);
6600 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6601 {
6602 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6603 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6604 {
6605 sda->def_regular = 0;
6606 /* This is somewhat magic. See elf_link_output_extsym. */
6607 sda->ref_dynamic = 1;
6608 sda->forced_local = 0;
6609 }
6610 }
6611 }
6612 }
6613
6614 void
6615 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6616 {
6617 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6618
6619 if (htab != NULL)
6620 {
6621 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6622 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6623 }
6624 }
6625
6626
6627 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6628
6629 static bfd_boolean
6630 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6631 {
6632 if (h->plt.plist != NULL
6633 && !h->def_regular
6634 && (!h->pointer_equality_needed
6635 || !h->ref_regular_nonweak))
6636 return FALSE;
6637
6638 return _bfd_elf_hash_symbol (h);
6639 }
6640 \f
6641 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6642
6643 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6644 used for some functions that are allowed to break the ABI). */
6645 static const int shared_stub_entry[] =
6646 {
6647 0x7c0802a6, /* mflr 0 */
6648 0x429f0005, /* bcl 20, 31, .Lxxx */
6649 0x7d8802a6, /* mflr 12 */
6650 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6651 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6652 0x7c0803a6, /* mtlr 0 */
6653 0x7d8903a6, /* mtctr 12 */
6654 0x4e800420, /* bctr */
6655 };
6656
6657 static const int stub_entry[] =
6658 {
6659 0x3d800000, /* lis 12,xxx@ha */
6660 0x398c0000, /* addi 12,12,xxx@l */
6661 0x7d8903a6, /* mtctr 12 */
6662 0x4e800420, /* bctr */
6663 };
6664
6665 struct ppc_elf_relax_info
6666 {
6667 unsigned int workaround_size;
6668 };
6669
6670 /* This function implements long branch trampolines, and the ppc476
6671 icache bug workaround. Any section needing trampolines or patch
6672 space for the workaround has its size extended so that we can
6673 add trampolines at the end of the section. */
6674
6675 static bfd_boolean
6676 ppc_elf_relax_section (bfd *abfd,
6677 asection *isec,
6678 struct bfd_link_info *link_info,
6679 bfd_boolean *again)
6680 {
6681 struct one_fixup
6682 {
6683 struct one_fixup *next;
6684 asection *tsec;
6685 /* Final link, can use the symbol offset. For a
6686 relocatable link we use the symbol's index. */
6687 bfd_vma toff;
6688 bfd_vma trampoff;
6689 };
6690
6691 Elf_Internal_Shdr *symtab_hdr;
6692 bfd_byte *contents = NULL;
6693 Elf_Internal_Sym *isymbuf = NULL;
6694 Elf_Internal_Rela *internal_relocs = NULL;
6695 Elf_Internal_Rela *irel, *irelend = NULL;
6696 struct one_fixup *fixups = NULL;
6697 struct ppc_elf_relax_info *relax_info = NULL;
6698 unsigned changes = 0;
6699 bfd_boolean workaround_change;
6700 struct ppc_elf_link_hash_table *htab;
6701 bfd_size_type trampbase, trampoff, newsize;
6702 asection *got2;
6703 bfd_boolean maybe_pasted;
6704
6705 *again = FALSE;
6706
6707 /* No need to do anything with non-alloc or non-code sections. */
6708 if ((isec->flags & SEC_ALLOC) == 0
6709 || (isec->flags & SEC_CODE) == 0
6710 || (isec->flags & SEC_LINKER_CREATED) != 0
6711 || isec->size < 4)
6712 return TRUE;
6713
6714 /* We cannot represent the required PIC relocs in the output, so don't
6715 do anything. The linker doesn't support mixing -shared and -r
6716 anyway. */
6717 if (link_info->relocatable && link_info->shared)
6718 return TRUE;
6719
6720 htab = ppc_elf_hash_table (link_info);
6721 if (htab == NULL)
6722 return TRUE;
6723
6724 isec->size = (isec->size + 3) & -4;
6725 if (isec->rawsize == 0)
6726 isec->rawsize = isec->size;
6727 trampbase = isec->size;
6728
6729 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6730 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6731 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6732
6733 if (htab->params->ppc476_workaround)
6734 {
6735 if (elf_section_data (isec)->sec_info == NULL)
6736 {
6737 elf_section_data (isec)->sec_info
6738 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6739 if (elf_section_data (isec)->sec_info == NULL)
6740 return FALSE;
6741 }
6742 relax_info = elf_section_data (isec)->sec_info;
6743 trampbase -= relax_info->workaround_size;
6744 }
6745
6746 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6747 || strcmp (isec->output_section->name, ".fini") == 0);
6748 /* Space for a branch around any trampolines. */
6749 trampoff = trampbase;
6750 if (maybe_pasted && trampbase == isec->rawsize)
6751 trampoff += 4;
6752
6753 symtab_hdr = &elf_symtab_hdr (abfd);
6754
6755 if (htab->params->branch_trampolines)
6756 {
6757 /* Get a copy of the native relocations. */
6758 if (isec->reloc_count != 0)
6759 {
6760 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6761 link_info->keep_memory);
6762 if (internal_relocs == NULL)
6763 goto error_return;
6764 }
6765
6766 got2 = bfd_get_section_by_name (abfd, ".got2");
6767
6768 irelend = internal_relocs + isec->reloc_count;
6769 for (irel = internal_relocs; irel < irelend; irel++)
6770 {
6771 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6772 bfd_vma toff, roff;
6773 asection *tsec;
6774 struct one_fixup *f;
6775 size_t insn_offset = 0;
6776 bfd_vma max_branch_offset, val;
6777 bfd_byte *hit_addr;
6778 unsigned long t0;
6779 struct elf_link_hash_entry *h;
6780 struct plt_entry **plist;
6781 unsigned char sym_type;
6782
6783 switch (r_type)
6784 {
6785 case R_PPC_REL24:
6786 case R_PPC_LOCAL24PC:
6787 case R_PPC_PLTREL24:
6788 max_branch_offset = 1 << 25;
6789 break;
6790
6791 case R_PPC_REL14:
6792 case R_PPC_REL14_BRTAKEN:
6793 case R_PPC_REL14_BRNTAKEN:
6794 max_branch_offset = 1 << 15;
6795 break;
6796
6797 default:
6798 continue;
6799 }
6800
6801 /* Get the value of the symbol referred to by the reloc. */
6802 h = NULL;
6803 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6804 {
6805 /* A local symbol. */
6806 Elf_Internal_Sym *isym;
6807
6808 /* Read this BFD's local symbols. */
6809 if (isymbuf == NULL)
6810 {
6811 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6812 if (isymbuf == NULL)
6813 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6814 symtab_hdr->sh_info, 0,
6815 NULL, NULL, NULL);
6816 if (isymbuf == 0)
6817 goto error_return;
6818 }
6819 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6820 if (isym->st_shndx == SHN_UNDEF)
6821 tsec = bfd_und_section_ptr;
6822 else if (isym->st_shndx == SHN_ABS)
6823 tsec = bfd_abs_section_ptr;
6824 else if (isym->st_shndx == SHN_COMMON)
6825 tsec = bfd_com_section_ptr;
6826 else
6827 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6828
6829 toff = isym->st_value;
6830 sym_type = ELF_ST_TYPE (isym->st_info);
6831 }
6832 else
6833 {
6834 /* Global symbol handling. */
6835 unsigned long indx;
6836
6837 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6838 h = elf_sym_hashes (abfd)[indx];
6839
6840 while (h->root.type == bfd_link_hash_indirect
6841 || h->root.type == bfd_link_hash_warning)
6842 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6843
6844 if (h->root.type == bfd_link_hash_defined
6845 || h->root.type == bfd_link_hash_defweak)
6846 {
6847 tsec = h->root.u.def.section;
6848 toff = h->root.u.def.value;
6849 }
6850 else if (h->root.type == bfd_link_hash_undefined
6851 || h->root.type == bfd_link_hash_undefweak)
6852 {
6853 tsec = bfd_und_section_ptr;
6854 toff = link_info->relocatable ? indx : 0;
6855 }
6856 else
6857 continue;
6858
6859 /* If this branch is to __tls_get_addr then we may later
6860 optimise away the call. We won't be needing a long-
6861 branch stub in that case. */
6862 if (link_info->executable
6863 && !link_info->relocatable
6864 && h == htab->tls_get_addr
6865 && irel != internal_relocs)
6866 {
6867 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6868 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6869 unsigned int tls_mask = 0;
6870
6871 /* The previous reloc should be one of R_PPC_TLSGD or
6872 R_PPC_TLSLD, or for older object files, a reloc
6873 on the __tls_get_addr arg setup insn. Get tls
6874 mask bits from the symbol on that reloc. */
6875 if (t_symndx < symtab_hdr->sh_info)
6876 {
6877 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6878
6879 if (local_got_offsets != NULL)
6880 {
6881 struct plt_entry **local_plt = (struct plt_entry **)
6882 (local_got_offsets + symtab_hdr->sh_info);
6883 char *lgot_masks = (char *)
6884 (local_plt + symtab_hdr->sh_info);
6885 tls_mask = lgot_masks[t_symndx];
6886 }
6887 }
6888 else
6889 {
6890 struct elf_link_hash_entry *th
6891 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6892
6893 while (th->root.type == bfd_link_hash_indirect
6894 || th->root.type == bfd_link_hash_warning)
6895 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6896
6897 tls_mask
6898 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6899 }
6900
6901 /* The mask bits tell us if the call will be
6902 optimised away. */
6903 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6904 && (t_rtype == R_PPC_TLSGD
6905 || t_rtype == R_PPC_GOT_TLSGD16
6906 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6907 continue;
6908 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6909 && (t_rtype == R_PPC_TLSLD
6910 || t_rtype == R_PPC_GOT_TLSLD16
6911 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6912 continue;
6913 }
6914
6915 sym_type = h->type;
6916 }
6917
6918 /* The condition here under which we call find_plt_ent must
6919 match that in relocate_section. If we call find_plt_ent here
6920 but not in relocate_section, or vice versa, then the branch
6921 destination used here may be incorrect. */
6922 plist = NULL;
6923 if (h != NULL)
6924 {
6925 /* We know is_branch_reloc (r_type) is true. */
6926 if (h->type == STT_GNU_IFUNC
6927 || r_type == R_PPC_PLTREL24)
6928 plist = &h->plt.plist;
6929 }
6930 else if (sym_type == STT_GNU_IFUNC
6931 && elf_local_got_offsets (abfd) != NULL)
6932 {
6933 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6934 struct plt_entry **local_plt = (struct plt_entry **)
6935 (local_got_offsets + symtab_hdr->sh_info);
6936 plist = local_plt + ELF32_R_SYM (irel->r_info);
6937 }
6938 if (plist != NULL)
6939 {
6940 bfd_vma addend = 0;
6941 struct plt_entry *ent;
6942
6943 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6944 addend = irel->r_addend;
6945 ent = find_plt_ent (plist, got2, addend);
6946 if (ent != NULL)
6947 {
6948 if (htab->plt_type == PLT_NEW
6949 || h == NULL
6950 || !htab->elf.dynamic_sections_created
6951 || h->dynindx == -1)
6952 {
6953 tsec = htab->glink;
6954 toff = ent->glink_offset;
6955 }
6956 else
6957 {
6958 tsec = htab->plt;
6959 toff = ent->plt.offset;
6960 }
6961 }
6962 }
6963
6964 /* If the branch and target are in the same section, you have
6965 no hope of adding stubs. We'll error out later should the
6966 branch overflow. */
6967 if (tsec == isec)
6968 continue;
6969
6970 /* There probably isn't any reason to handle symbols in
6971 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6972 attribute for a code section, and we are only looking at
6973 branches. However, implement it correctly here as a
6974 reference for other target relax_section functions. */
6975 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6976 {
6977 /* At this stage in linking, no SEC_MERGE symbol has been
6978 adjusted, so all references to such symbols need to be
6979 passed through _bfd_merged_section_offset. (Later, in
6980 relocate_section, all SEC_MERGE symbols *except* for
6981 section symbols have been adjusted.)
6982
6983 gas may reduce relocations against symbols in SEC_MERGE
6984 sections to a relocation against the section symbol when
6985 the original addend was zero. When the reloc is against
6986 a section symbol we should include the addend in the
6987 offset passed to _bfd_merged_section_offset, since the
6988 location of interest is the original symbol. On the
6989 other hand, an access to "sym+addend" where "sym" is not
6990 a section symbol should not include the addend; Such an
6991 access is presumed to be an offset from "sym"; The
6992 location of interest is just "sym". */
6993 if (sym_type == STT_SECTION)
6994 toff += irel->r_addend;
6995
6996 toff
6997 = _bfd_merged_section_offset (abfd, &tsec,
6998 elf_section_data (tsec)->sec_info,
6999 toff);
7000
7001 if (sym_type != STT_SECTION)
7002 toff += irel->r_addend;
7003 }
7004 /* PLTREL24 addends are special. */
7005 else if (r_type != R_PPC_PLTREL24)
7006 toff += irel->r_addend;
7007
7008 /* Attempted -shared link of non-pic code loses. */
7009 if ((!link_info->relocatable
7010 && tsec == bfd_und_section_ptr)
7011 || tsec->output_section == NULL
7012 || (tsec->owner != NULL
7013 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7014 continue;
7015
7016 roff = irel->r_offset;
7017
7018 /* If the branch is in range, no need to do anything. */
7019 if (tsec != bfd_und_section_ptr
7020 && (!link_info->relocatable
7021 /* A relocatable link may have sections moved during
7022 final link, so do not presume they remain in range. */
7023 || tsec->output_section == isec->output_section))
7024 {
7025 bfd_vma symaddr, reladdr;
7026
7027 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7028 reladdr = isec->output_section->vma + isec->output_offset + roff;
7029 if (symaddr - reladdr + max_branch_offset
7030 < 2 * max_branch_offset)
7031 continue;
7032 }
7033
7034 /* Look for an existing fixup to this address. */
7035 for (f = fixups; f ; f = f->next)
7036 if (f->tsec == tsec && f->toff == toff)
7037 break;
7038
7039 if (f == NULL)
7040 {
7041 size_t size;
7042 unsigned long stub_rtype;
7043
7044 val = trampoff - roff;
7045 if (val >= max_branch_offset)
7046 /* Oh dear, we can't reach a trampoline. Don't try to add
7047 one. We'll report an error later. */
7048 continue;
7049
7050 if (link_info->shared)
7051 {
7052 size = 4 * ARRAY_SIZE (shared_stub_entry);
7053 insn_offset = 12;
7054 }
7055 else
7056 {
7057 size = 4 * ARRAY_SIZE (stub_entry);
7058 insn_offset = 0;
7059 }
7060 stub_rtype = R_PPC_RELAX;
7061 if (tsec == htab->plt
7062 || tsec == htab->glink)
7063 {
7064 stub_rtype = R_PPC_RELAX_PLT;
7065 if (r_type == R_PPC_PLTREL24)
7066 stub_rtype = R_PPC_RELAX_PLTREL24;
7067 }
7068
7069 /* Hijack the old relocation. Since we need two
7070 relocations for this use a "composite" reloc. */
7071 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7072 stub_rtype);
7073 irel->r_offset = trampoff + insn_offset;
7074 if (r_type == R_PPC_PLTREL24
7075 && stub_rtype != R_PPC_RELAX_PLTREL24)
7076 irel->r_addend = 0;
7077
7078 /* Record the fixup so we don't do it again this section. */
7079 f = bfd_malloc (sizeof (*f));
7080 f->next = fixups;
7081 f->tsec = tsec;
7082 f->toff = toff;
7083 f->trampoff = trampoff;
7084 fixups = f;
7085
7086 trampoff += size;
7087 changes++;
7088 }
7089 else
7090 {
7091 val = f->trampoff - roff;
7092 if (val >= max_branch_offset)
7093 continue;
7094
7095 /* Nop out the reloc, since we're finalizing things here. */
7096 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7097 }
7098
7099 /* Get the section contents. */
7100 if (contents == NULL)
7101 {
7102 /* Get cached copy if it exists. */
7103 if (elf_section_data (isec)->this_hdr.contents != NULL)
7104 contents = elf_section_data (isec)->this_hdr.contents;
7105 /* Go get them off disk. */
7106 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7107 goto error_return;
7108 }
7109
7110 /* Fix up the existing branch to hit the trampoline. */
7111 hit_addr = contents + roff;
7112 switch (r_type)
7113 {
7114 case R_PPC_REL24:
7115 case R_PPC_LOCAL24PC:
7116 case R_PPC_PLTREL24:
7117 t0 = bfd_get_32 (abfd, hit_addr);
7118 t0 &= ~0x3fffffc;
7119 t0 |= val & 0x3fffffc;
7120 bfd_put_32 (abfd, t0, hit_addr);
7121 break;
7122
7123 case R_PPC_REL14:
7124 case R_PPC_REL14_BRTAKEN:
7125 case R_PPC_REL14_BRNTAKEN:
7126 t0 = bfd_get_32 (abfd, hit_addr);
7127 t0 &= ~0xfffc;
7128 t0 |= val & 0xfffc;
7129 bfd_put_32 (abfd, t0, hit_addr);
7130 break;
7131 }
7132 }
7133
7134 while (fixups != NULL)
7135 {
7136 struct one_fixup *f = fixups;
7137 fixups = fixups->next;
7138 free (f);
7139 }
7140 }
7141
7142 workaround_change = FALSE;
7143 newsize = trampoff;
7144 if (htab->params->ppc476_workaround
7145 && (!link_info->relocatable
7146 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7147 {
7148 bfd_vma addr, end_addr;
7149 unsigned int crossings;
7150 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7151
7152 addr = isec->output_section->vma + isec->output_offset;
7153 end_addr = addr + trampoff - 1;
7154 addr &= -pagesize;
7155 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7156 if (crossings != 0)
7157 {
7158 /* Keep space aligned, to ensure the patch code itself does
7159 not cross a page. Don't decrease size calculated on a
7160 previous pass as otherwise we might never settle on a layout. */
7161 newsize = 15 - (end_addr & 15);
7162 newsize += crossings * 16;
7163 if (relax_info->workaround_size < newsize)
7164 {
7165 relax_info->workaround_size = newsize;
7166 workaround_change = TRUE;
7167 }
7168 /* Ensure relocate_section is called. */
7169 isec->flags |= SEC_RELOC;
7170 }
7171 newsize = trampoff + relax_info->workaround_size;
7172 }
7173
7174 if (changes || workaround_change)
7175 isec->size = newsize;
7176
7177 if (isymbuf != NULL
7178 && symtab_hdr->contents != (unsigned char *) isymbuf)
7179 {
7180 if (! link_info->keep_memory)
7181 free (isymbuf);
7182 else
7183 {
7184 /* Cache the symbols for elf_link_input_bfd. */
7185 symtab_hdr->contents = (unsigned char *) isymbuf;
7186 }
7187 }
7188
7189 if (contents != NULL
7190 && elf_section_data (isec)->this_hdr.contents != contents)
7191 {
7192 if (!changes && !link_info->keep_memory)
7193 free (contents);
7194 else
7195 {
7196 /* Cache the section contents for elf_link_input_bfd. */
7197 elf_section_data (isec)->this_hdr.contents = contents;
7198 }
7199 }
7200
7201 if (changes != 0)
7202 {
7203 /* Append sufficient NOP relocs so we can write out relocation
7204 information for the trampolines. */
7205 Elf_Internal_Shdr *rel_hdr;
7206 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7207 * sizeof (*new_relocs));
7208 unsigned ix;
7209
7210 if (!new_relocs)
7211 goto error_return;
7212 memcpy (new_relocs, internal_relocs,
7213 isec->reloc_count * sizeof (*new_relocs));
7214 for (ix = changes; ix--;)
7215 {
7216 irel = new_relocs + ix + isec->reloc_count;
7217
7218 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7219 }
7220 if (internal_relocs != elf_section_data (isec)->relocs)
7221 free (internal_relocs);
7222 elf_section_data (isec)->relocs = new_relocs;
7223 isec->reloc_count += changes;
7224 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7225 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7226 }
7227 else if (internal_relocs != NULL
7228 && elf_section_data (isec)->relocs != internal_relocs)
7229 free (internal_relocs);
7230
7231 *again = changes != 0 || workaround_change;
7232 return TRUE;
7233
7234 error_return:
7235 while (fixups != NULL)
7236 {
7237 struct one_fixup *f = fixups;
7238 fixups = fixups->next;
7239 free (f);
7240 }
7241 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7242 free (isymbuf);
7243 if (contents != NULL
7244 && elf_section_data (isec)->this_hdr.contents != contents)
7245 free (contents);
7246 if (internal_relocs != NULL
7247 && elf_section_data (isec)->relocs != internal_relocs)
7248 free (internal_relocs);
7249 return FALSE;
7250 }
7251 \f
7252 /* What to do when ld finds relocations against symbols defined in
7253 discarded sections. */
7254
7255 static unsigned int
7256 ppc_elf_action_discarded (asection *sec)
7257 {
7258 if (strcmp (".fixup", sec->name) == 0)
7259 return 0;
7260
7261 if (strcmp (".got2", sec->name) == 0)
7262 return 0;
7263
7264 return _bfd_elf_default_action_discarded (sec);
7265 }
7266 \f
7267 /* Fill in the address for a pointer generated in a linker section. */
7268
7269 static bfd_vma
7270 elf_finish_pointer_linker_section (bfd *input_bfd,
7271 elf_linker_section_t *lsect,
7272 struct elf_link_hash_entry *h,
7273 bfd_vma relocation,
7274 const Elf_Internal_Rela *rel)
7275 {
7276 elf_linker_section_pointers_t *linker_section_ptr;
7277
7278 BFD_ASSERT (lsect != NULL);
7279
7280 if (h != NULL)
7281 {
7282 /* Handle global symbol. */
7283 struct ppc_elf_link_hash_entry *eh;
7284
7285 eh = (struct ppc_elf_link_hash_entry *) h;
7286 BFD_ASSERT (eh->elf.def_regular);
7287 linker_section_ptr = eh->linker_section_pointer;
7288 }
7289 else
7290 {
7291 /* Handle local symbol. */
7292 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7293
7294 BFD_ASSERT (is_ppc_elf (input_bfd));
7295 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7296 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7297 }
7298
7299 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7300 rel->r_addend,
7301 lsect);
7302 BFD_ASSERT (linker_section_ptr != NULL);
7303
7304 /* Offset will always be a multiple of four, so use the bottom bit
7305 as a "written" flag. */
7306 if ((linker_section_ptr->offset & 1) == 0)
7307 {
7308 bfd_put_32 (lsect->section->owner,
7309 relocation + linker_section_ptr->addend,
7310 lsect->section->contents + linker_section_ptr->offset);
7311 linker_section_ptr->offset += 1;
7312 }
7313
7314 relocation = (lsect->section->output_section->vma
7315 + lsect->section->output_offset
7316 + linker_section_ptr->offset - 1
7317 - SYM_VAL (lsect->sym));
7318
7319 #ifdef DEBUG
7320 fprintf (stderr,
7321 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7322 lsect->name, (long) relocation, (long) relocation);
7323 #endif
7324
7325 return relocation;
7326 }
7327
7328 #define PPC_LO(v) ((v) & 0xffff)
7329 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7330 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7331
7332 static void
7333 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7334 struct bfd_link_info *info)
7335 {
7336 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7337 bfd *output_bfd = info->output_bfd;
7338 bfd_vma plt;
7339
7340 plt = ((ent->plt.offset & ~1)
7341 + plt_sec->output_section->vma
7342 + plt_sec->output_offset);
7343
7344 if (info->shared)
7345 {
7346 bfd_vma got = 0;
7347
7348 if (ent->addend >= 32768)
7349 got = (ent->addend
7350 + ent->sec->output_section->vma
7351 + ent->sec->output_offset);
7352 else if (htab->elf.hgot != NULL)
7353 got = SYM_VAL (htab->elf.hgot);
7354
7355 plt -= got;
7356
7357 if (plt + 0x8000 < 0x10000)
7358 {
7359 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7360 p += 4;
7361 bfd_put_32 (output_bfd, MTCTR_11, p);
7362 p += 4;
7363 bfd_put_32 (output_bfd, BCTR, p);
7364 p += 4;
7365 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7366 p += 4;
7367 }
7368 else
7369 {
7370 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7371 p += 4;
7372 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7373 p += 4;
7374 bfd_put_32 (output_bfd, MTCTR_11, p);
7375 p += 4;
7376 bfd_put_32 (output_bfd, BCTR, p);
7377 p += 4;
7378 }
7379 }
7380 else
7381 {
7382 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7383 p += 4;
7384 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7385 p += 4;
7386 bfd_put_32 (output_bfd, MTCTR_11, p);
7387 p += 4;
7388 bfd_put_32 (output_bfd, BCTR, p);
7389 p += 4;
7390 }
7391 }
7392
7393 /* Return true if symbol is defined statically. */
7394
7395 static bfd_boolean
7396 is_static_defined (struct elf_link_hash_entry *h)
7397 {
7398 return ((h->root.type == bfd_link_hash_defined
7399 || h->root.type == bfd_link_hash_defweak)
7400 && h->root.u.def.section != NULL
7401 && h->root.u.def.section->output_section != NULL);
7402 }
7403
7404 /* If INSN is an opcode that may be used with an @tls operand, return
7405 the transformed insn for TLS optimisation, otherwise return 0. If
7406 REG is non-zero only match an insn with RB or RA equal to REG. */
7407
7408 unsigned int
7409 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7410 {
7411 unsigned int rtra;
7412
7413 if ((insn & (0x3f << 26)) != 31 << 26)
7414 return 0;
7415
7416 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7417 rtra = insn & ((1 << 26) - (1 << 16));
7418 else if (((insn >> 16) & 0x1f) == reg)
7419 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7420 else
7421 return 0;
7422
7423 if ((insn & (0x3ff << 1)) == 266 << 1)
7424 /* add -> addi. */
7425 insn = 14 << 26;
7426 else if ((insn & (0x1f << 1)) == 23 << 1
7427 && ((insn & (0x1f << 6)) < 14 << 6
7428 || ((insn & (0x1f << 6)) >= 16 << 6
7429 && (insn & (0x1f << 6)) < 24 << 6)))
7430 /* load and store indexed -> dform. */
7431 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7432 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7433 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7434 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7435 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7436 /* lwax -> lwa. */
7437 insn = (58 << 26) | 2;
7438 else
7439 return 0;
7440 insn |= rtra;
7441 return insn;
7442 }
7443
7444 /* If INSN is an opcode that may be used with an @tprel operand, return
7445 the transformed insn for an undefined weak symbol, ie. with the
7446 thread pointer REG operand removed. Otherwise return 0. */
7447
7448 unsigned int
7449 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7450 {
7451 if ((insn & (0x1f << 16)) == reg << 16
7452 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7453 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7454 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7455 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7456 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7457 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7458 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7459 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7460 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7461 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7462 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7463 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7464 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7465 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7466 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7467 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7468 && (insn & 3) != 1)
7469 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7470 && ((insn & 3) == 0 || (insn & 3) == 3))))
7471 {
7472 insn &= ~(0x1f << 16);
7473 }
7474 else if ((insn & (0x1f << 21)) == reg << 21
7475 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7476 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7477 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7478 {
7479 insn &= ~(0x1f << 21);
7480 insn |= (insn & (0x1f << 16)) << 5;
7481 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7482 insn -= 2 >> 26; /* convert to ori,oris */
7483 }
7484 else
7485 insn = 0;
7486 return insn;
7487 }
7488
7489 static bfd_boolean
7490 is_insn_ds_form (unsigned int insn)
7491 {
7492 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7493 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7494 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7495 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7496 }
7497
7498 static bfd_boolean
7499 is_insn_dq_form (unsigned int insn)
7500 {
7501 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7502 }
7503
7504 /* The RELOCATE_SECTION function is called by the ELF backend linker
7505 to handle the relocations for a section.
7506
7507 The relocs are always passed as Rela structures; if the section
7508 actually uses Rel structures, the r_addend field will always be
7509 zero.
7510
7511 This function is responsible for adjust the section contents as
7512 necessary, and (if using Rela relocs and generating a
7513 relocatable output file) adjusting the reloc addend as
7514 necessary.
7515
7516 This function does not have to worry about setting the reloc
7517 address or the reloc symbol index.
7518
7519 LOCAL_SYMS is a pointer to the swapped in local symbols.
7520
7521 LOCAL_SECTIONS is an array giving the section in the input file
7522 corresponding to the st_shndx field of each local symbol.
7523
7524 The global hash table entry for the global symbols can be found
7525 via elf_sym_hashes (input_bfd).
7526
7527 When generating relocatable output, this function must handle
7528 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7529 going to be the section symbol corresponding to the output
7530 section, which means that the addend must be adjusted
7531 accordingly. */
7532
7533 static bfd_boolean
7534 ppc_elf_relocate_section (bfd *output_bfd,
7535 struct bfd_link_info *info,
7536 bfd *input_bfd,
7537 asection *input_section,
7538 bfd_byte *contents,
7539 Elf_Internal_Rela *relocs,
7540 Elf_Internal_Sym *local_syms,
7541 asection **local_sections)
7542 {
7543 Elf_Internal_Shdr *symtab_hdr;
7544 struct elf_link_hash_entry **sym_hashes;
7545 struct ppc_elf_link_hash_table *htab;
7546 Elf_Internal_Rela *rel;
7547 Elf_Internal_Rela *relend;
7548 Elf_Internal_Rela outrel;
7549 asection *got2;
7550 bfd_vma *local_got_offsets;
7551 bfd_boolean ret = TRUE;
7552 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7553 bfd_boolean is_vxworks_tls;
7554
7555 #ifdef DEBUG
7556 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7557 "%ld relocations%s",
7558 input_bfd, input_section,
7559 (long) input_section->reloc_count,
7560 (info->relocatable) ? " (relocatable)" : "");
7561 #endif
7562
7563 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7564
7565 /* Initialize howto table if not already done. */
7566 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7567 ppc_elf_howto_init ();
7568
7569 htab = ppc_elf_hash_table (info);
7570 local_got_offsets = elf_local_got_offsets (input_bfd);
7571 symtab_hdr = &elf_symtab_hdr (input_bfd);
7572 sym_hashes = elf_sym_hashes (input_bfd);
7573 /* We have to handle relocations in vxworks .tls_vars sections
7574 specially, because the dynamic loader is 'weird'. */
7575 is_vxworks_tls = (htab->is_vxworks && info->shared
7576 && !strcmp (input_section->output_section->name,
7577 ".tls_vars"));
7578 rel = relocs;
7579 relend = relocs + input_section->reloc_count;
7580 for (; rel < relend; rel++)
7581 {
7582 enum elf_ppc_reloc_type r_type;
7583 bfd_vma addend;
7584 bfd_reloc_status_type r;
7585 Elf_Internal_Sym *sym;
7586 asection *sec;
7587 struct elf_link_hash_entry *h;
7588 const char *sym_name;
7589 reloc_howto_type *howto;
7590 unsigned long r_symndx;
7591 bfd_vma relocation;
7592 bfd_vma branch_bit, from;
7593 bfd_boolean unresolved_reloc;
7594 bfd_boolean warned;
7595 unsigned int tls_type, tls_mask, tls_gd;
7596 struct plt_entry **ifunc;
7597 struct reloc_howto_struct alt_howto;
7598
7599 r_type = ELF32_R_TYPE (rel->r_info);
7600 sym = NULL;
7601 sec = NULL;
7602 h = NULL;
7603 unresolved_reloc = FALSE;
7604 warned = FALSE;
7605 r_symndx = ELF32_R_SYM (rel->r_info);
7606
7607 if (r_symndx < symtab_hdr->sh_info)
7608 {
7609 sym = local_syms + r_symndx;
7610 sec = local_sections[r_symndx];
7611 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7612
7613 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7614 }
7615 else
7616 {
7617 bfd_boolean ignored;
7618
7619 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7620 r_symndx, symtab_hdr, sym_hashes,
7621 h, sec, relocation,
7622 unresolved_reloc, warned, ignored);
7623
7624 sym_name = h->root.root.string;
7625 }
7626
7627 if (sec != NULL && discarded_section (sec))
7628 {
7629 /* For relocs against symbols from removed linkonce sections,
7630 or sections discarded by a linker script, we just want the
7631 section contents zeroed. Avoid any special processing. */
7632 howto = NULL;
7633 if (r_type < R_PPC_max)
7634 howto = ppc_elf_howto_table[r_type];
7635 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7636 rel, 1, relend, howto, 0, contents);
7637 }
7638
7639 if (info->relocatable)
7640 {
7641 if (got2 != NULL
7642 && r_type == R_PPC_PLTREL24
7643 && rel->r_addend != 0)
7644 {
7645 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7646 addend specifies the GOT pointer offset within .got2. */
7647 rel->r_addend += got2->output_offset;
7648 }
7649 if (r_type != R_PPC_RELAX_PLT
7650 && r_type != R_PPC_RELAX_PLTREL24
7651 && r_type != R_PPC_RELAX)
7652 continue;
7653 }
7654
7655 /* TLS optimizations. Replace instruction sequences and relocs
7656 based on information we collected in tls_optimize. We edit
7657 RELOCS so that --emit-relocs will output something sensible
7658 for the final instruction stream. */
7659 tls_mask = 0;
7660 tls_gd = 0;
7661 if (h != NULL)
7662 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7663 else if (local_got_offsets != NULL)
7664 {
7665 struct plt_entry **local_plt;
7666 char *lgot_masks;
7667 local_plt
7668 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7669 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7670 tls_mask = lgot_masks[r_symndx];
7671 }
7672
7673 /* Ensure reloc mapping code below stays sane. */
7674 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7675 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7676 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7677 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7678 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7679 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7680 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7681 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7682 abort ();
7683 switch (r_type)
7684 {
7685 default:
7686 break;
7687
7688 case R_PPC_GOT_TPREL16:
7689 case R_PPC_GOT_TPREL16_LO:
7690 if ((tls_mask & TLS_TLS) != 0
7691 && (tls_mask & TLS_TPREL) == 0)
7692 {
7693 bfd_vma insn;
7694
7695 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7696 insn &= 31 << 21;
7697 insn |= 0x3c020000; /* addis 0,2,0 */
7698 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7699 r_type = R_PPC_TPREL16_HA;
7700 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7701 }
7702 break;
7703
7704 case R_PPC_TLS:
7705 if ((tls_mask & TLS_TLS) != 0
7706 && (tls_mask & TLS_TPREL) == 0)
7707 {
7708 bfd_vma insn;
7709
7710 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7711 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7712 if (insn == 0)
7713 abort ();
7714 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7715 r_type = R_PPC_TPREL16_LO;
7716 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7717
7718 /* Was PPC_TLS which sits on insn boundary, now
7719 PPC_TPREL16_LO which is at low-order half-word. */
7720 rel->r_offset += d_offset;
7721 }
7722 break;
7723
7724 case R_PPC_GOT_TLSGD16_HI:
7725 case R_PPC_GOT_TLSGD16_HA:
7726 tls_gd = TLS_TPRELGD;
7727 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7728 goto tls_gdld_hi;
7729 break;
7730
7731 case R_PPC_GOT_TLSLD16_HI:
7732 case R_PPC_GOT_TLSLD16_HA:
7733 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7734 {
7735 tls_gdld_hi:
7736 if ((tls_mask & tls_gd) != 0)
7737 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7738 + R_PPC_GOT_TPREL16);
7739 else
7740 {
7741 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7742 rel->r_offset -= d_offset;
7743 r_type = R_PPC_NONE;
7744 }
7745 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7746 }
7747 break;
7748
7749 case R_PPC_GOT_TLSGD16:
7750 case R_PPC_GOT_TLSGD16_LO:
7751 tls_gd = TLS_TPRELGD;
7752 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7753 goto tls_ldgd_opt;
7754 break;
7755
7756 case R_PPC_GOT_TLSLD16:
7757 case R_PPC_GOT_TLSLD16_LO:
7758 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7759 {
7760 unsigned int insn1, insn2;
7761 bfd_vma offset;
7762
7763 tls_ldgd_opt:
7764 offset = (bfd_vma) -1;
7765 /* If not using the newer R_PPC_TLSGD/LD to mark
7766 __tls_get_addr calls, we must trust that the call
7767 stays with its arg setup insns, ie. that the next
7768 reloc is the __tls_get_addr call associated with
7769 the current reloc. Edit both insns. */
7770 if (input_section->has_tls_get_addr_call
7771 && rel + 1 < relend
7772 && branch_reloc_hash_match (input_bfd, rel + 1,
7773 htab->tls_get_addr))
7774 offset = rel[1].r_offset;
7775 if ((tls_mask & tls_gd) != 0)
7776 {
7777 /* IE */
7778 insn1 = bfd_get_32 (output_bfd,
7779 contents + rel->r_offset - d_offset);
7780 insn1 &= (1 << 26) - 1;
7781 insn1 |= 32 << 26; /* lwz */
7782 if (offset != (bfd_vma) -1)
7783 {
7784 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7785 insn2 = 0x7c631214; /* add 3,3,2 */
7786 bfd_put_32 (output_bfd, insn2, contents + offset);
7787 }
7788 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7789 + R_PPC_GOT_TPREL16);
7790 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7791 }
7792 else
7793 {
7794 /* LE */
7795 insn1 = 0x3c620000; /* addis 3,2,0 */
7796 if (tls_gd == 0)
7797 {
7798 /* Was an LD reloc. */
7799 for (r_symndx = 0;
7800 r_symndx < symtab_hdr->sh_info;
7801 r_symndx++)
7802 if (local_sections[r_symndx] == sec)
7803 break;
7804 if (r_symndx >= symtab_hdr->sh_info)
7805 r_symndx = STN_UNDEF;
7806 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7807 if (r_symndx != STN_UNDEF)
7808 rel->r_addend -= (local_syms[r_symndx].st_value
7809 + sec->output_offset
7810 + sec->output_section->vma);
7811 }
7812 r_type = R_PPC_TPREL16_HA;
7813 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7814 if (offset != (bfd_vma) -1)
7815 {
7816 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7817 rel[1].r_offset = offset + d_offset;
7818 rel[1].r_addend = rel->r_addend;
7819 insn2 = 0x38630000; /* addi 3,3,0 */
7820 bfd_put_32 (output_bfd, insn2, contents + offset);
7821 }
7822 }
7823 bfd_put_32 (output_bfd, insn1,
7824 contents + rel->r_offset - d_offset);
7825 if (tls_gd == 0)
7826 {
7827 /* We changed the symbol on an LD reloc. Start over
7828 in order to get h, sym, sec etc. right. */
7829 rel--;
7830 continue;
7831 }
7832 }
7833 break;
7834
7835 case R_PPC_TLSGD:
7836 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7837 {
7838 unsigned int insn2;
7839 bfd_vma offset = rel->r_offset;
7840
7841 if ((tls_mask & TLS_TPRELGD) != 0)
7842 {
7843 /* IE */
7844 r_type = R_PPC_NONE;
7845 insn2 = 0x7c631214; /* add 3,3,2 */
7846 }
7847 else
7848 {
7849 /* LE */
7850 r_type = R_PPC_TPREL16_LO;
7851 rel->r_offset += d_offset;
7852 insn2 = 0x38630000; /* addi 3,3,0 */
7853 }
7854 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7855 bfd_put_32 (output_bfd, insn2, contents + offset);
7856 /* Zap the reloc on the _tls_get_addr call too. */
7857 BFD_ASSERT (offset == rel[1].r_offset);
7858 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7859 }
7860 break;
7861
7862 case R_PPC_TLSLD:
7863 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7864 {
7865 unsigned int insn2;
7866
7867 for (r_symndx = 0;
7868 r_symndx < symtab_hdr->sh_info;
7869 r_symndx++)
7870 if (local_sections[r_symndx] == sec)
7871 break;
7872 if (r_symndx >= symtab_hdr->sh_info)
7873 r_symndx = STN_UNDEF;
7874 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7875 if (r_symndx != STN_UNDEF)
7876 rel->r_addend -= (local_syms[r_symndx].st_value
7877 + sec->output_offset
7878 + sec->output_section->vma);
7879
7880 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7881 rel->r_offset += d_offset;
7882 insn2 = 0x38630000; /* addi 3,3,0 */
7883 bfd_put_32 (output_bfd, insn2,
7884 contents + rel->r_offset - d_offset);
7885 /* Zap the reloc on the _tls_get_addr call too. */
7886 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7887 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7888 rel--;
7889 continue;
7890 }
7891 break;
7892 }
7893
7894 /* Handle other relocations that tweak non-addend part of insn. */
7895 branch_bit = 0;
7896 switch (r_type)
7897 {
7898 default:
7899 break;
7900
7901 /* Branch taken prediction relocations. */
7902 case R_PPC_ADDR14_BRTAKEN:
7903 case R_PPC_REL14_BRTAKEN:
7904 branch_bit = BRANCH_PREDICT_BIT;
7905 /* Fall thru */
7906
7907 /* Branch not taken prediction relocations. */
7908 case R_PPC_ADDR14_BRNTAKEN:
7909 case R_PPC_REL14_BRNTAKEN:
7910 {
7911 bfd_vma insn;
7912
7913 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7914 insn &= ~BRANCH_PREDICT_BIT;
7915 insn |= branch_bit;
7916
7917 from = (rel->r_offset
7918 + input_section->output_offset
7919 + input_section->output_section->vma);
7920
7921 /* Invert 'y' bit if not the default. */
7922 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7923 insn ^= BRANCH_PREDICT_BIT;
7924
7925 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7926 break;
7927 }
7928 }
7929
7930 ifunc = NULL;
7931 if (!htab->is_vxworks)
7932 {
7933 struct plt_entry *ent;
7934
7935 if (h != NULL)
7936 {
7937 if (h->type == STT_GNU_IFUNC)
7938 ifunc = &h->plt.plist;
7939 }
7940 else if (local_got_offsets != NULL
7941 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7942 {
7943 struct plt_entry **local_plt;
7944
7945 local_plt = (struct plt_entry **) (local_got_offsets
7946 + symtab_hdr->sh_info);
7947 ifunc = local_plt + r_symndx;
7948 }
7949
7950 ent = NULL;
7951 if (ifunc != NULL
7952 && (!info->shared
7953 || is_branch_reloc (r_type)))
7954 {
7955 addend = 0;
7956 if (r_type == R_PPC_PLTREL24 && info->shared)
7957 addend = rel->r_addend;
7958 ent = find_plt_ent (ifunc, got2, addend);
7959 }
7960 if (ent != NULL)
7961 {
7962 if (h == NULL && (ent->plt.offset & 1) == 0)
7963 {
7964 Elf_Internal_Rela rela;
7965 bfd_byte *loc;
7966
7967 rela.r_offset = (htab->iplt->output_section->vma
7968 + htab->iplt->output_offset
7969 + ent->plt.offset);
7970 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7971 rela.r_addend = relocation;
7972 loc = htab->reliplt->contents;
7973 loc += (htab->reliplt->reloc_count++
7974 * sizeof (Elf32_External_Rela));
7975 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7976
7977 ent->plt.offset |= 1;
7978 }
7979 if (h == NULL && (ent->glink_offset & 1) == 0)
7980 {
7981 unsigned char *p = ((unsigned char *) htab->glink->contents
7982 + ent->glink_offset);
7983 write_glink_stub (ent, htab->iplt, p, info);
7984 ent->glink_offset |= 1;
7985 }
7986
7987 unresolved_reloc = FALSE;
7988 if (htab->plt_type == PLT_NEW
7989 || !htab->elf.dynamic_sections_created
7990 || h == NULL
7991 || h->dynindx == -1)
7992 relocation = (htab->glink->output_section->vma
7993 + htab->glink->output_offset
7994 + (ent->glink_offset & ~1));
7995 else
7996 relocation = (htab->plt->output_section->vma
7997 + htab->plt->output_offset
7998 + ent->plt.offset);
7999 }
8000 }
8001
8002 addend = rel->r_addend;
8003 tls_type = 0;
8004 howto = NULL;
8005 if (r_type < R_PPC_max)
8006 howto = ppc_elf_howto_table[r_type];
8007 switch (r_type)
8008 {
8009 default:
8010 info->callbacks->einfo
8011 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8012 input_bfd, (int) r_type, sym_name);
8013
8014 bfd_set_error (bfd_error_bad_value);
8015 ret = FALSE;
8016 continue;
8017
8018 case R_PPC_NONE:
8019 case R_PPC_TLS:
8020 case R_PPC_TLSGD:
8021 case R_PPC_TLSLD:
8022 case R_PPC_EMB_MRKREF:
8023 case R_PPC_GNU_VTINHERIT:
8024 case R_PPC_GNU_VTENTRY:
8025 continue;
8026
8027 /* GOT16 relocations. Like an ADDR16 using the symbol's
8028 address in the GOT as relocation value instead of the
8029 symbol's value itself. Also, create a GOT entry for the
8030 symbol and put the symbol value there. */
8031 case R_PPC_GOT_TLSGD16:
8032 case R_PPC_GOT_TLSGD16_LO:
8033 case R_PPC_GOT_TLSGD16_HI:
8034 case R_PPC_GOT_TLSGD16_HA:
8035 tls_type = TLS_TLS | TLS_GD;
8036 goto dogot;
8037
8038 case R_PPC_GOT_TLSLD16:
8039 case R_PPC_GOT_TLSLD16_LO:
8040 case R_PPC_GOT_TLSLD16_HI:
8041 case R_PPC_GOT_TLSLD16_HA:
8042 tls_type = TLS_TLS | TLS_LD;
8043 goto dogot;
8044
8045 case R_PPC_GOT_TPREL16:
8046 case R_PPC_GOT_TPREL16_LO:
8047 case R_PPC_GOT_TPREL16_HI:
8048 case R_PPC_GOT_TPREL16_HA:
8049 tls_type = TLS_TLS | TLS_TPREL;
8050 goto dogot;
8051
8052 case R_PPC_GOT_DTPREL16:
8053 case R_PPC_GOT_DTPREL16_LO:
8054 case R_PPC_GOT_DTPREL16_HI:
8055 case R_PPC_GOT_DTPREL16_HA:
8056 tls_type = TLS_TLS | TLS_DTPREL;
8057 goto dogot;
8058
8059 case R_PPC_GOT16:
8060 case R_PPC_GOT16_LO:
8061 case R_PPC_GOT16_HI:
8062 case R_PPC_GOT16_HA:
8063 tls_mask = 0;
8064 dogot:
8065 {
8066 /* Relocation is to the entry for this symbol in the global
8067 offset table. */
8068 bfd_vma off;
8069 bfd_vma *offp;
8070 unsigned long indx;
8071
8072 if (htab->got == NULL)
8073 abort ();
8074
8075 indx = 0;
8076 if (tls_type == (TLS_TLS | TLS_LD)
8077 && (h == NULL
8078 || !h->def_dynamic))
8079 offp = &htab->tlsld_got.offset;
8080 else if (h != NULL)
8081 {
8082 bfd_boolean dyn;
8083 dyn = htab->elf.dynamic_sections_created;
8084 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8085 || (info->shared
8086 && SYMBOL_REFERENCES_LOCAL (info, h)))
8087 /* This is actually a static link, or it is a
8088 -Bsymbolic link and the symbol is defined
8089 locally, or the symbol was forced to be local
8090 because of a version file. */
8091 ;
8092 else
8093 {
8094 BFD_ASSERT (h->dynindx != -1);
8095 indx = h->dynindx;
8096 unresolved_reloc = FALSE;
8097 }
8098 offp = &h->got.offset;
8099 }
8100 else
8101 {
8102 if (local_got_offsets == NULL)
8103 abort ();
8104 offp = &local_got_offsets[r_symndx];
8105 }
8106
8107 /* The offset must always be a multiple of 4. We use the
8108 least significant bit to record whether we have already
8109 processed this entry. */
8110 off = *offp;
8111 if ((off & 1) != 0)
8112 off &= ~1;
8113 else
8114 {
8115 unsigned int tls_m = (tls_mask
8116 & (TLS_LD | TLS_GD | TLS_DTPREL
8117 | TLS_TPREL | TLS_TPRELGD));
8118
8119 if (offp == &htab->tlsld_got.offset)
8120 tls_m = TLS_LD;
8121 else if (h == NULL
8122 || !h->def_dynamic)
8123 tls_m &= ~TLS_LD;
8124
8125 /* We might have multiple got entries for this sym.
8126 Initialize them all. */
8127 do
8128 {
8129 int tls_ty = 0;
8130
8131 if ((tls_m & TLS_LD) != 0)
8132 {
8133 tls_ty = TLS_TLS | TLS_LD;
8134 tls_m &= ~TLS_LD;
8135 }
8136 else if ((tls_m & TLS_GD) != 0)
8137 {
8138 tls_ty = TLS_TLS | TLS_GD;
8139 tls_m &= ~TLS_GD;
8140 }
8141 else if ((tls_m & TLS_DTPREL) != 0)
8142 {
8143 tls_ty = TLS_TLS | TLS_DTPREL;
8144 tls_m &= ~TLS_DTPREL;
8145 }
8146 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8147 {
8148 tls_ty = TLS_TLS | TLS_TPREL;
8149 tls_m = 0;
8150 }
8151
8152 /* Generate relocs for the dynamic linker. */
8153 if ((info->shared || indx != 0)
8154 && (offp == &htab->tlsld_got.offset
8155 || h == NULL
8156 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8157 || h->root.type != bfd_link_hash_undefweak))
8158 {
8159 asection *rsec = htab->relgot;
8160 bfd_byte * loc;
8161
8162 if (ifunc != NULL)
8163 rsec = htab->reliplt;
8164 outrel.r_offset = (htab->got->output_section->vma
8165 + htab->got->output_offset
8166 + off);
8167 outrel.r_addend = 0;
8168 if (tls_ty & (TLS_LD | TLS_GD))
8169 {
8170 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8171 if (tls_ty == (TLS_TLS | TLS_GD))
8172 {
8173 loc = rsec->contents;
8174 loc += (rsec->reloc_count++
8175 * sizeof (Elf32_External_Rela));
8176 bfd_elf32_swap_reloca_out (output_bfd,
8177 &outrel, loc);
8178 outrel.r_offset += 4;
8179 outrel.r_info
8180 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8181 }
8182 }
8183 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8184 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8185 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8186 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8187 else if (indx != 0)
8188 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8189 else if (ifunc != NULL)
8190 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8191 else
8192 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8193 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8194 {
8195 outrel.r_addend += relocation;
8196 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8197 outrel.r_addend -= htab->elf.tls_sec->vma;
8198 }
8199 loc = rsec->contents;
8200 loc += (rsec->reloc_count++
8201 * sizeof (Elf32_External_Rela));
8202 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8203 }
8204
8205 /* Init the .got section contents if we're not
8206 emitting a reloc. */
8207 else
8208 {
8209 bfd_vma value = relocation;
8210
8211 if (tls_ty == (TLS_TLS | TLS_LD))
8212 value = 1;
8213 else if (tls_ty != 0)
8214 {
8215 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8216 if (tls_ty == (TLS_TLS | TLS_TPREL))
8217 value += DTP_OFFSET - TP_OFFSET;
8218
8219 if (tls_ty == (TLS_TLS | TLS_GD))
8220 {
8221 bfd_put_32 (output_bfd, value,
8222 htab->got->contents + off + 4);
8223 value = 1;
8224 }
8225 }
8226 bfd_put_32 (output_bfd, value,
8227 htab->got->contents + off);
8228 }
8229
8230 off += 4;
8231 if (tls_ty & (TLS_LD | TLS_GD))
8232 off += 4;
8233 }
8234 while (tls_m != 0);
8235
8236 off = *offp;
8237 *offp = off | 1;
8238 }
8239
8240 if (off >= (bfd_vma) -2)
8241 abort ();
8242
8243 if ((tls_type & TLS_TLS) != 0)
8244 {
8245 if (tls_type != (TLS_TLS | TLS_LD))
8246 {
8247 if ((tls_mask & TLS_LD) != 0
8248 && !(h == NULL
8249 || !h->def_dynamic))
8250 off += 8;
8251 if (tls_type != (TLS_TLS | TLS_GD))
8252 {
8253 if ((tls_mask & TLS_GD) != 0)
8254 off += 8;
8255 if (tls_type != (TLS_TLS | TLS_DTPREL))
8256 {
8257 if ((tls_mask & TLS_DTPREL) != 0)
8258 off += 4;
8259 }
8260 }
8261 }
8262 }
8263
8264 relocation = (htab->got->output_section->vma
8265 + htab->got->output_offset
8266 + off
8267 - SYM_VAL (htab->elf.hgot));
8268
8269 /* Addends on got relocations don't make much sense.
8270 x+off@got is actually x@got+off, and since the got is
8271 generated by a hash table traversal, the value in the
8272 got at entry m+n bears little relation to the entry m. */
8273 if (addend != 0)
8274 info->callbacks->einfo
8275 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8276 input_bfd, input_section, rel->r_offset,
8277 howto->name,
8278 sym_name);
8279 }
8280 break;
8281
8282 /* Relocations that need no special processing. */
8283 case R_PPC_LOCAL24PC:
8284 /* It makes no sense to point a local relocation
8285 at a symbol not in this object. */
8286 if (unresolved_reloc)
8287 {
8288 if (! (*info->callbacks->undefined_symbol) (info,
8289 h->root.root.string,
8290 input_bfd,
8291 input_section,
8292 rel->r_offset,
8293 TRUE))
8294 return FALSE;
8295 continue;
8296 }
8297 break;
8298
8299 case R_PPC_DTPREL16:
8300 case R_PPC_DTPREL16_LO:
8301 case R_PPC_DTPREL16_HI:
8302 case R_PPC_DTPREL16_HA:
8303 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8304 break;
8305
8306 /* Relocations that may need to be propagated if this is a shared
8307 object. */
8308 case R_PPC_TPREL16:
8309 case R_PPC_TPREL16_LO:
8310 case R_PPC_TPREL16_HI:
8311 case R_PPC_TPREL16_HA:
8312 if (h != NULL
8313 && h->root.type == bfd_link_hash_undefweak
8314 && h->dynindx == -1)
8315 {
8316 /* Make this relocation against an undefined weak symbol
8317 resolve to zero. This is really just a tweak, since
8318 code using weak externs ought to check that they are
8319 defined before using them. */
8320 bfd_byte *p = contents + rel->r_offset - d_offset;
8321 unsigned int insn = bfd_get_32 (output_bfd, p);
8322 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8323 if (insn != 0)
8324 bfd_put_32 (output_bfd, insn, p);
8325 break;
8326 }
8327 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8328 /* The TPREL16 relocs shouldn't really be used in shared
8329 libs as they will result in DT_TEXTREL being set, but
8330 support them anyway. */
8331 goto dodyn;
8332
8333 case R_PPC_TPREL32:
8334 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8335 goto dodyn;
8336
8337 case R_PPC_DTPREL32:
8338 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8339 goto dodyn;
8340
8341 case R_PPC_DTPMOD32:
8342 relocation = 1;
8343 addend = 0;
8344 goto dodyn;
8345
8346 case R_PPC_REL16:
8347 case R_PPC_REL16_LO:
8348 case R_PPC_REL16_HI:
8349 case R_PPC_REL16_HA:
8350 break;
8351
8352 case R_PPC_REL32:
8353 if (h == NULL || h == htab->elf.hgot)
8354 break;
8355 /* fall through */
8356
8357 case R_PPC_ADDR32:
8358 case R_PPC_ADDR16:
8359 case R_PPC_ADDR16_LO:
8360 case R_PPC_ADDR16_HI:
8361 case R_PPC_ADDR16_HA:
8362 case R_PPC_UADDR32:
8363 case R_PPC_UADDR16:
8364 goto dodyn;
8365
8366 case R_PPC_VLE_REL8:
8367 case R_PPC_VLE_REL15:
8368 case R_PPC_VLE_REL24:
8369 case R_PPC_REL24:
8370 case R_PPC_REL14:
8371 case R_PPC_REL14_BRTAKEN:
8372 case R_PPC_REL14_BRNTAKEN:
8373 /* If these relocations are not to a named symbol, they can be
8374 handled right here, no need to bother the dynamic linker. */
8375 if (SYMBOL_CALLS_LOCAL (info, h)
8376 || h == htab->elf.hgot)
8377 break;
8378 /* fall through */
8379
8380 case R_PPC_ADDR24:
8381 case R_PPC_ADDR14:
8382 case R_PPC_ADDR14_BRTAKEN:
8383 case R_PPC_ADDR14_BRNTAKEN:
8384 if (h != NULL && !info->shared)
8385 break;
8386 /* fall through */
8387
8388 dodyn:
8389 if ((input_section->flags & SEC_ALLOC) == 0
8390 || is_vxworks_tls)
8391 break;
8392
8393 if ((info->shared
8394 && !(h != NULL
8395 && ((h->root.type == bfd_link_hash_undefined
8396 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8397 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8398 || (h->root.type == bfd_link_hash_undefweak
8399 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8400 && (must_be_dyn_reloc (info, r_type)
8401 || !SYMBOL_CALLS_LOCAL (info, h)))
8402 || (ELIMINATE_COPY_RELOCS
8403 && !info->shared
8404 && h != NULL
8405 && h->dynindx != -1
8406 && !h->non_got_ref
8407 && !h->def_regular))
8408 {
8409 int skip;
8410 bfd_byte *loc;
8411 asection *sreloc;
8412 #ifdef DEBUG
8413 fprintf (stderr, "ppc_elf_relocate_section needs to "
8414 "create relocation for %s\n",
8415 (h && h->root.root.string
8416 ? h->root.root.string : "<unknown>"));
8417 #endif
8418
8419 /* When generating a shared object, these relocations
8420 are copied into the output file to be resolved at run
8421 time. */
8422 sreloc = elf_section_data (input_section)->sreloc;
8423 if (ifunc)
8424 sreloc = htab->reliplt;
8425 if (sreloc == NULL)
8426 return FALSE;
8427
8428 skip = 0;
8429 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8430 input_section,
8431 rel->r_offset);
8432 if (outrel.r_offset == (bfd_vma) -1
8433 || outrel.r_offset == (bfd_vma) -2)
8434 skip = (int) outrel.r_offset;
8435 outrel.r_offset += (input_section->output_section->vma
8436 + input_section->output_offset);
8437
8438 if (skip)
8439 memset (&outrel, 0, sizeof outrel);
8440 else if ((h != NULL
8441 && (h->root.type == bfd_link_hash_undefined
8442 || h->root.type == bfd_link_hash_undefweak))
8443 || !SYMBOL_REFERENCES_LOCAL (info, h))
8444 {
8445 BFD_ASSERT (h->dynindx != -1);
8446 unresolved_reloc = FALSE;
8447 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8448 outrel.r_addend = rel->r_addend;
8449 }
8450 else
8451 {
8452 outrel.r_addend = relocation + rel->r_addend;
8453
8454 if (r_type != R_PPC_ADDR32)
8455 {
8456 long indx = 0;
8457
8458 if (ifunc != NULL)
8459 {
8460 /* If we get here when building a static
8461 executable, then the libc startup function
8462 responsible for applying indirect function
8463 relocations is going to complain about
8464 the reloc type.
8465 If we get here when building a dynamic
8466 executable, it will be because we have
8467 a text relocation. The dynamic loader
8468 will set the text segment writable and
8469 non-executable to apply text relocations.
8470 So we'll segfault when trying to run the
8471 indirection function to resolve the reloc. */
8472 info->callbacks->einfo
8473 (_("%P: %H: relocation %s for indirect "
8474 "function %s unsupported\n"),
8475 input_bfd, input_section, rel->r_offset,
8476 howto->name,
8477 sym_name);
8478 ret = FALSE;
8479 }
8480 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8481 ;
8482 else if (sec == NULL || sec->owner == NULL)
8483 {
8484 bfd_set_error (bfd_error_bad_value);
8485 ret = FALSE;
8486 }
8487 else
8488 {
8489 asection *osec;
8490
8491 /* We are turning this relocation into one
8492 against a section symbol. It would be
8493 proper to subtract the symbol's value,
8494 osec->vma, from the emitted reloc addend,
8495 but ld.so expects buggy relocs.
8496 FIXME: Why not always use a zero index? */
8497 osec = sec->output_section;
8498 indx = elf_section_data (osec)->dynindx;
8499 if (indx == 0)
8500 {
8501 osec = htab->elf.text_index_section;
8502 indx = elf_section_data (osec)->dynindx;
8503 }
8504 BFD_ASSERT (indx != 0);
8505 #ifdef DEBUG
8506 if (indx == 0)
8507 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8508 indx, osec->name, osec->flags,
8509 h->root.root.string);
8510 #endif
8511 }
8512
8513 outrel.r_info = ELF32_R_INFO (indx, r_type);
8514 }
8515 else if (ifunc != NULL)
8516 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8517 else
8518 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8519 }
8520
8521 loc = sreloc->contents;
8522 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8523 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8524
8525 if (skip == -1)
8526 continue;
8527
8528 /* This reloc will be computed at runtime. We clear the memory
8529 so that it contains predictable value. */
8530 if (! skip
8531 && ((input_section->flags & SEC_ALLOC) != 0
8532 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8533 {
8534 relocation = howto->pc_relative ? outrel.r_offset : 0;
8535 addend = 0;
8536 break;
8537 }
8538 }
8539 break;
8540
8541 case R_PPC_RELAX_PLT:
8542 case R_PPC_RELAX_PLTREL24:
8543 if (h != NULL)
8544 {
8545 struct plt_entry *ent;
8546 bfd_vma got2_addend = 0;
8547
8548 if (r_type == R_PPC_RELAX_PLTREL24)
8549 {
8550 if (info->shared)
8551 got2_addend = addend;
8552 addend = 0;
8553 }
8554 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8555 if (htab->plt_type == PLT_NEW)
8556 relocation = (htab->glink->output_section->vma
8557 + htab->glink->output_offset
8558 + ent->glink_offset);
8559 else
8560 relocation = (htab->plt->output_section->vma
8561 + htab->plt->output_offset
8562 + ent->plt.offset);
8563 }
8564 /* Fall thru */
8565
8566 case R_PPC_RELAX:
8567 {
8568 const int *stub;
8569 size_t size;
8570 size_t insn_offset = rel->r_offset;
8571 unsigned int insn;
8572
8573 if (info->shared)
8574 {
8575 relocation -= (input_section->output_section->vma
8576 + input_section->output_offset
8577 + rel->r_offset - 4);
8578 stub = shared_stub_entry;
8579 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8580 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8581 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8582 stub += 3;
8583 size = ARRAY_SIZE (shared_stub_entry) - 3;
8584 }
8585 else
8586 {
8587 stub = stub_entry;
8588 size = ARRAY_SIZE (stub_entry);
8589 }
8590
8591 relocation += addend;
8592 if (info->relocatable)
8593 relocation = 0;
8594
8595 /* First insn is HA, second is LO. */
8596 insn = *stub++;
8597 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8598 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8599 insn_offset += 4;
8600
8601 insn = *stub++;
8602 insn |= relocation & 0xffff;
8603 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8604 insn_offset += 4;
8605 size -= 2;
8606
8607 while (size != 0)
8608 {
8609 insn = *stub++;
8610 --size;
8611 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8612 insn_offset += 4;
8613 }
8614
8615 /* Rewrite the reloc and convert one of the trailing nop
8616 relocs to describe this relocation. */
8617 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8618 /* The relocs are at the bottom 2 bytes */
8619 rel[0].r_offset += d_offset;
8620 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8621 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8622 rel[1].r_offset += 4;
8623 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8624 rel++;
8625 }
8626 continue;
8627
8628 /* Indirect .sdata relocation. */
8629 case R_PPC_EMB_SDAI16:
8630 BFD_ASSERT (htab->sdata[0].section != NULL);
8631 if (!is_static_defined (htab->sdata[0].sym))
8632 {
8633 unresolved_reloc = TRUE;
8634 break;
8635 }
8636 relocation
8637 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8638 h, relocation, rel);
8639 addend = 0;
8640 break;
8641
8642 /* Indirect .sdata2 relocation. */
8643 case R_PPC_EMB_SDA2I16:
8644 BFD_ASSERT (htab->sdata[1].section != NULL);
8645 if (!is_static_defined (htab->sdata[1].sym))
8646 {
8647 unresolved_reloc = TRUE;
8648 break;
8649 }
8650 relocation
8651 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8652 h, relocation, rel);
8653 addend = 0;
8654 break;
8655
8656 /* Handle the TOC16 reloc. We want to use the offset within the .got
8657 section, not the actual VMA. This is appropriate when generating
8658 an embedded ELF object, for which the .got section acts like the
8659 AIX .toc section. */
8660 case R_PPC_TOC16: /* phony GOT16 relocations */
8661 if (sec == NULL || sec->output_section == NULL)
8662 {
8663 unresolved_reloc = TRUE;
8664 break;
8665 }
8666 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8667 ".got") == 0
8668 || strcmp (bfd_get_section_name (sec->owner, sec),
8669 ".cgot") == 0);
8670
8671 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8672 break;
8673
8674 case R_PPC_PLTREL24:
8675 if (h != NULL && ifunc == NULL)
8676 {
8677 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8678 info->shared ? addend : 0);
8679 if (ent == NULL
8680 || htab->plt == NULL)
8681 {
8682 /* We didn't make a PLT entry for this symbol. This
8683 happens when statically linking PIC code, or when
8684 using -Bsymbolic. */
8685 }
8686 else
8687 {
8688 /* Relocation is to the entry for this symbol in the
8689 procedure linkage table. */
8690 unresolved_reloc = FALSE;
8691 if (htab->plt_type == PLT_NEW)
8692 relocation = (htab->glink->output_section->vma
8693 + htab->glink->output_offset
8694 + ent->glink_offset);
8695 else
8696 relocation = (htab->plt->output_section->vma
8697 + htab->plt->output_offset
8698 + ent->plt.offset);
8699 }
8700 }
8701
8702 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8703 addend specifies the GOT pointer offset within .got2.
8704 Don't apply it to the relocation field. */
8705 addend = 0;
8706 break;
8707
8708 /* Relocate against _SDA_BASE_. */
8709 case R_PPC_SDAREL16:
8710 {
8711 const char *name;
8712 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8713
8714 if (sec == NULL
8715 || sec->output_section == NULL
8716 || !is_static_defined (sda))
8717 {
8718 unresolved_reloc = TRUE;
8719 break;
8720 }
8721 addend -= SYM_VAL (sda);
8722
8723 name = bfd_get_section_name (output_bfd, sec->output_section);
8724 if (!(strcmp (name, ".sdata") == 0
8725 || strcmp (name, ".sbss") == 0))
8726 {
8727 info->callbacks->einfo
8728 (_("%P: %B: the target (%s) of a %s relocation is "
8729 "in the wrong output section (%s)\n"),
8730 input_bfd,
8731 sym_name,
8732 howto->name,
8733 name);
8734 }
8735 }
8736 break;
8737
8738 /* Relocate against _SDA2_BASE_. */
8739 case R_PPC_EMB_SDA2REL:
8740 {
8741 const char *name;
8742 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8743
8744 if (sec == NULL
8745 || sec->output_section == NULL
8746 || !is_static_defined (sda))
8747 {
8748 unresolved_reloc = TRUE;
8749 break;
8750 }
8751 addend -= SYM_VAL (sda);
8752
8753 name = bfd_get_section_name (output_bfd, sec->output_section);
8754 if (!(strcmp (name, ".sdata2") == 0
8755 || strcmp (name, ".sbss2") == 0))
8756 {
8757 info->callbacks->einfo
8758 (_("%P: %B: the target (%s) of a %s relocation is "
8759 "in the wrong output section (%s)\n"),
8760 input_bfd,
8761 sym_name,
8762 howto->name,
8763 name);
8764 }
8765 }
8766 break;
8767
8768 case R_PPC_VLE_LO16A:
8769 relocation = relocation + addend;
8770 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8771 relocation, split16a_type);
8772 continue;
8773
8774 case R_PPC_VLE_LO16D:
8775 relocation = relocation + addend;
8776 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8777 relocation, split16d_type);
8778 continue;
8779
8780 case R_PPC_VLE_HI16A:
8781 relocation = (relocation + addend) >> 16;
8782 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8783 relocation, split16a_type);
8784 continue;
8785
8786 case R_PPC_VLE_HI16D:
8787 relocation = (relocation + addend) >> 16;
8788 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8789 relocation, split16d_type);
8790 continue;
8791
8792 case R_PPC_VLE_HA16A:
8793 relocation = (relocation + addend + 0x8000) >> 16;
8794 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8795 relocation, split16a_type);
8796 continue;
8797
8798 case R_PPC_VLE_HA16D:
8799 relocation = (relocation + addend + 0x8000) >> 16;
8800 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8801 relocation, split16d_type);
8802 continue;
8803
8804 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8805 case R_PPC_EMB_SDA21:
8806 case R_PPC_VLE_SDA21:
8807 case R_PPC_EMB_RELSDA:
8808 case R_PPC_VLE_SDA21_LO:
8809 {
8810 const char *name;
8811 int reg;
8812 unsigned int insn;
8813 struct elf_link_hash_entry *sda = NULL;
8814
8815 if (sec == NULL || sec->output_section == NULL)
8816 {
8817 unresolved_reloc = TRUE;
8818 break;
8819 }
8820
8821 name = bfd_get_section_name (output_bfd, sec->output_section);
8822 if (strcmp (name, ".sdata") == 0
8823 || strcmp (name, ".sbss") == 0)
8824 {
8825 reg = 13;
8826 sda = htab->sdata[0].sym;
8827 }
8828 else if (strcmp (name, ".sdata2") == 0
8829 || strcmp (name, ".sbss2") == 0)
8830 {
8831 reg = 2;
8832 sda = htab->sdata[1].sym;
8833 }
8834 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8835 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8836 {
8837 reg = 0;
8838 }
8839 else
8840 {
8841 info->callbacks->einfo
8842 (_("%P: %B: the target (%s) of a %s relocation is "
8843 "in the wrong output section (%s)\n"),
8844 input_bfd,
8845 sym_name,
8846 howto->name,
8847 name);
8848
8849 bfd_set_error (bfd_error_bad_value);
8850 ret = FALSE;
8851 continue;
8852 }
8853
8854 if (sda != NULL)
8855 {
8856 if (!is_static_defined (sda))
8857 {
8858 unresolved_reloc = TRUE;
8859 break;
8860 }
8861 addend -= SYM_VAL (sda);
8862 }
8863
8864 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8865 if (reg == 0
8866 && (r_type == R_PPC_VLE_SDA21
8867 || r_type == R_PPC_VLE_SDA21_LO))
8868 {
8869 relocation = relocation + addend;
8870 addend = 0;
8871
8872 /* Force e_li insn, keeping RT from original insn. */
8873 insn &= 0x1f << 21;
8874 insn |= 28u << 26;
8875
8876 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8877 /* Top 4 bits of value to 17..20. */
8878 insn |= (relocation & 0xf0000) >> 5;
8879 /* Next 5 bits of the value to 11..15. */
8880 insn |= (relocation & 0xf800) << 5;
8881 /* And the final 11 bits of the value to bits 21 to 31. */
8882 insn |= relocation & 0x7ff;
8883
8884 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8885
8886 if (r_type == R_PPC_VLE_SDA21
8887 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8888 goto overflow;
8889 continue;
8890 }
8891 else if (r_type == R_PPC_EMB_SDA21
8892 || r_type == R_PPC_VLE_SDA21
8893 || r_type == R_PPC_VLE_SDA21_LO)
8894 {
8895 /* Fill in register field. */
8896 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8897 }
8898 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8899 }
8900 break;
8901
8902 case R_PPC_VLE_SDAREL_LO16A:
8903 case R_PPC_VLE_SDAREL_LO16D:
8904 case R_PPC_VLE_SDAREL_HI16A:
8905 case R_PPC_VLE_SDAREL_HI16D:
8906 case R_PPC_VLE_SDAREL_HA16A:
8907 case R_PPC_VLE_SDAREL_HA16D:
8908 {
8909 bfd_vma value;
8910 const char *name;
8911 //int reg;
8912 struct elf_link_hash_entry *sda = NULL;
8913
8914 if (sec == NULL || sec->output_section == NULL)
8915 {
8916 unresolved_reloc = TRUE;
8917 break;
8918 }
8919
8920 name = bfd_get_section_name (output_bfd, sec->output_section);
8921 if (strcmp (name, ".sdata") == 0
8922 || strcmp (name, ".sbss") == 0)
8923 {
8924 //reg = 13;
8925 sda = htab->sdata[0].sym;
8926 }
8927 else if (strcmp (name, ".sdata2") == 0
8928 || strcmp (name, ".sbss2") == 0)
8929 {
8930 //reg = 2;
8931 sda = htab->sdata[1].sym;
8932 }
8933 else
8934 {
8935 (*_bfd_error_handler)
8936 (_("%B: the target (%s) of a %s relocation is "
8937 "in the wrong output section (%s)"),
8938 input_bfd,
8939 sym_name,
8940 howto->name,
8941 name);
8942
8943 bfd_set_error (bfd_error_bad_value);
8944 ret = FALSE;
8945 continue;
8946 }
8947
8948 if (sda != NULL)
8949 {
8950 if (!is_static_defined (sda))
8951 {
8952 unresolved_reloc = TRUE;
8953 break;
8954 }
8955 }
8956
8957 value = (sda->root.u.def.section->output_section->vma
8958 + sda->root.u.def.section->output_offset
8959 + addend);
8960
8961 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8962 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8963 value, split16a_type);
8964 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8965 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8966 value, split16d_type);
8967 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8968 {
8969 value = value >> 16;
8970 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8971 value, split16a_type);
8972 }
8973 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8974 {
8975 value = value >> 16;
8976 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8977 value, split16d_type);
8978 }
8979 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8980 {
8981 value = (value + 0x8000) >> 16;
8982 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8983 value, split16a_type);
8984 }
8985 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8986 {
8987 value = (value + 0x8000) >> 16;
8988 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8989 value, split16d_type);
8990 }
8991 }
8992 continue;
8993
8994 /* Relocate against the beginning of the section. */
8995 case R_PPC_SECTOFF:
8996 case R_PPC_SECTOFF_LO:
8997 case R_PPC_SECTOFF_HI:
8998 case R_PPC_SECTOFF_HA:
8999 if (sec == NULL || sec->output_section == NULL)
9000 {
9001 unresolved_reloc = TRUE;
9002 break;
9003 }
9004 addend -= sec->output_section->vma;
9005 break;
9006
9007 /* Negative relocations. */
9008 case R_PPC_EMB_NADDR32:
9009 case R_PPC_EMB_NADDR16:
9010 case R_PPC_EMB_NADDR16_LO:
9011 case R_PPC_EMB_NADDR16_HI:
9012 case R_PPC_EMB_NADDR16_HA:
9013 addend -= 2 * relocation;
9014 break;
9015
9016 case R_PPC_COPY:
9017 case R_PPC_GLOB_DAT:
9018 case R_PPC_JMP_SLOT:
9019 case R_PPC_RELATIVE:
9020 case R_PPC_IRELATIVE:
9021 case R_PPC_PLT32:
9022 case R_PPC_PLTREL32:
9023 case R_PPC_PLT16_LO:
9024 case R_PPC_PLT16_HI:
9025 case R_PPC_PLT16_HA:
9026 case R_PPC_ADDR30:
9027 case R_PPC_EMB_RELSEC16:
9028 case R_PPC_EMB_RELST_LO:
9029 case R_PPC_EMB_RELST_HI:
9030 case R_PPC_EMB_RELST_HA:
9031 case R_PPC_EMB_BIT_FLD:
9032 info->callbacks->einfo
9033 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9034 input_bfd,
9035 howto->name,
9036 sym_name);
9037
9038 bfd_set_error (bfd_error_invalid_operation);
9039 ret = FALSE;
9040 continue;
9041 }
9042
9043 /* Do any further special processing. */
9044 switch (r_type)
9045 {
9046 default:
9047 break;
9048
9049 case R_PPC_ADDR16_HA:
9050 case R_PPC_REL16_HA:
9051 case R_PPC_SECTOFF_HA:
9052 case R_PPC_TPREL16_HA:
9053 case R_PPC_DTPREL16_HA:
9054 case R_PPC_EMB_NADDR16_HA:
9055 case R_PPC_EMB_RELST_HA:
9056 /* It's just possible that this symbol is a weak symbol
9057 that's not actually defined anywhere. In that case,
9058 'sec' would be NULL, and we should leave the symbol
9059 alone (it will be set to zero elsewhere in the link). */
9060 if (sec == NULL)
9061 break;
9062 /* Fall thru */
9063
9064 case R_PPC_PLT16_HA:
9065 case R_PPC_GOT16_HA:
9066 case R_PPC_GOT_TLSGD16_HA:
9067 case R_PPC_GOT_TLSLD16_HA:
9068 case R_PPC_GOT_TPREL16_HA:
9069 case R_PPC_GOT_DTPREL16_HA:
9070 /* Add 0x10000 if sign bit in 0:15 is set.
9071 Bits 0:15 are not used. */
9072 addend += 0x8000;
9073 break;
9074
9075 case R_PPC_ADDR16:
9076 case R_PPC_ADDR16_LO:
9077 case R_PPC_GOT16:
9078 case R_PPC_GOT16_LO:
9079 case R_PPC_SDAREL16:
9080 case R_PPC_SECTOFF:
9081 case R_PPC_SECTOFF_LO:
9082 case R_PPC_DTPREL16:
9083 case R_PPC_DTPREL16_LO:
9084 case R_PPC_TPREL16:
9085 case R_PPC_TPREL16_LO:
9086 case R_PPC_GOT_TLSGD16:
9087 case R_PPC_GOT_TLSGD16_LO:
9088 case R_PPC_GOT_TLSLD16:
9089 case R_PPC_GOT_TLSLD16_LO:
9090 case R_PPC_GOT_DTPREL16:
9091 case R_PPC_GOT_DTPREL16_LO:
9092 case R_PPC_GOT_TPREL16:
9093 case R_PPC_GOT_TPREL16_LO:
9094 {
9095 /* The 32-bit ABI lacks proper relocations to deal with
9096 certain 64-bit instructions. Prevent damage to bits
9097 that make up part of the insn opcode. */
9098 unsigned int insn, mask, lobit;
9099
9100 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9101 mask = 0;
9102 if (is_insn_ds_form (insn))
9103 mask = 3;
9104 else if (is_insn_dq_form (insn))
9105 mask = 15;
9106 else
9107 break;
9108 lobit = mask & (relocation + addend);
9109 if (lobit != 0)
9110 {
9111 addend -= lobit;
9112 info->callbacks->einfo
9113 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9114 input_bfd, input_section, rel->r_offset,
9115 howto->name, sym_name, mask + 1);
9116 bfd_set_error (bfd_error_bad_value);
9117 ret = FALSE;
9118 }
9119 addend += insn & mask;
9120 }
9121 break;
9122 }
9123
9124 #ifdef DEBUG
9125 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9126 "offset = %ld, addend = %ld\n",
9127 howto->name,
9128 (int) r_type,
9129 sym_name,
9130 r_symndx,
9131 (long) rel->r_offset,
9132 (long) addend);
9133 #endif
9134
9135 if (unresolved_reloc
9136 && !((input_section->flags & SEC_DEBUGGING) != 0
9137 && h->def_dynamic)
9138 && _bfd_elf_section_offset (output_bfd, info, input_section,
9139 rel->r_offset) != (bfd_vma) -1)
9140 {
9141 info->callbacks->einfo
9142 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9143 input_bfd, input_section, rel->r_offset,
9144 howto->name,
9145 sym_name);
9146 ret = FALSE;
9147 }
9148
9149 /* 16-bit fields in insns mostly have signed values, but a
9150 few insns have 16-bit unsigned values. Really, we should
9151 have different reloc types. */
9152 if (howto->complain_on_overflow != complain_overflow_dont
9153 && howto->dst_mask == 0xffff
9154 && (input_section->flags & SEC_CODE) != 0)
9155 {
9156 enum complain_overflow complain = complain_overflow_signed;
9157
9158 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9159 {
9160 unsigned int insn;
9161
9162 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9163 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9164 complain = complain_overflow_bitfield;
9165 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9166 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9167 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9168 complain = complain_overflow_unsigned;
9169 }
9170 if (howto->complain_on_overflow != complain)
9171 {
9172 alt_howto = *howto;
9173 alt_howto.complain_on_overflow = complain;
9174 howto = &alt_howto;
9175 }
9176 }
9177
9178 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9179 rel->r_offset, relocation, addend);
9180
9181 if (r != bfd_reloc_ok)
9182 {
9183 if (r == bfd_reloc_overflow)
9184 {
9185 overflow:
9186 if (warned)
9187 continue;
9188 if (h != NULL
9189 && h->root.type == bfd_link_hash_undefweak
9190 && howto->pc_relative)
9191 {
9192 /* Assume this is a call protected by other code that
9193 detect the symbol is undefined. If this is the case,
9194 we can safely ignore the overflow. If not, the
9195 program is hosed anyway, and a little warning isn't
9196 going to help. */
9197
9198 continue;
9199 }
9200
9201 if (! (*info->callbacks->reloc_overflow) (info,
9202 (h ? &h->root : NULL),
9203 sym_name,
9204 howto->name,
9205 rel->r_addend,
9206 input_bfd,
9207 input_section,
9208 rel->r_offset))
9209 return FALSE;
9210 }
9211 else
9212 {
9213 info->callbacks->einfo
9214 (_("%P: %H: %s reloc against `%s': error %d\n"),
9215 input_bfd, input_section, rel->r_offset,
9216 howto->name, sym_name, (int) r);
9217 ret = FALSE;
9218 }
9219 }
9220 }
9221
9222 #ifdef DEBUG
9223 fprintf (stderr, "\n");
9224 #endif
9225
9226 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9227 && input_section->size != input_section->rawsize
9228 && (strcmp (input_section->output_section->name, ".init") == 0
9229 || strcmp (input_section->output_section->name, ".fini") == 0))
9230 {
9231 /* Branch around the trampolines. */
9232 unsigned int insn = B + input_section->size - input_section->rawsize;
9233 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9234 }
9235
9236 if (htab->params->ppc476_workaround
9237 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9238 && (!info->relocatable
9239 || (input_section->output_section->alignment_power
9240 >= htab->params->pagesize_p2)))
9241 {
9242 struct ppc_elf_relax_info *relax_info;
9243 bfd_vma start_addr, end_addr, addr;
9244 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9245
9246 relax_info = elf_section_data (input_section)->sec_info;
9247 if (relax_info->workaround_size != 0)
9248 {
9249 bfd_byte *p;
9250 unsigned int n;
9251 bfd_byte fill[4];
9252
9253 bfd_put_32 (input_bfd, BA, fill);
9254 p = contents + input_section->size - relax_info->workaround_size;
9255 n = relax_info->workaround_size >> 2;
9256 while (n--)
9257 {
9258 memcpy (p, fill, 4);
9259 p += 4;
9260 }
9261 }
9262
9263 /* The idea is: Replace the last instruction on a page with a
9264 branch to a patch area. Put the insn there followed by a
9265 branch back to the next page. Complicated a little by
9266 needing to handle moved conditional branches, and by not
9267 wanting to touch data-in-text. */
9268
9269 start_addr = (input_section->output_section->vma
9270 + input_section->output_offset);
9271 end_addr = (start_addr + input_section->size
9272 - relax_info->workaround_size);
9273 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9274 addr < end_addr;
9275 addr += pagesize)
9276 {
9277 bfd_vma offset = addr - start_addr;
9278 Elf_Internal_Rela *lo, *hi;
9279 bfd_boolean is_data;
9280 bfd_vma patch_off, patch_addr;
9281 unsigned int insn;
9282
9283 /* Do we have a data reloc at this offset? If so, leave
9284 the word alone. */
9285 is_data = FALSE;
9286 lo = relocs;
9287 hi = relend;
9288 rel = NULL;
9289 while (lo < hi)
9290 {
9291 rel = lo + (hi - lo) / 2;
9292 if (rel->r_offset < offset)
9293 lo = rel + 1;
9294 else if (rel->r_offset > offset + 3)
9295 hi = rel;
9296 else
9297 {
9298 switch (ELF32_R_TYPE (rel->r_info))
9299 {
9300 case R_PPC_ADDR32:
9301 case R_PPC_UADDR32:
9302 case R_PPC_REL32:
9303 case R_PPC_ADDR30:
9304 is_data = TRUE;
9305 break;
9306 default:
9307 break;
9308 }
9309 break;
9310 }
9311 }
9312 if (is_data)
9313 continue;
9314
9315 /* Some instructions can be left alone too. Unconditional
9316 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9317 avoid the icache failure.
9318
9319 The problem occurs due to prefetch across a page boundary
9320 where stale instructions can be fetched from the next
9321 page, and the mechanism for flushing these bad
9322 instructions fails under certain circumstances. The
9323 unconditional branches:
9324 1) Branch: b, bl, ba, bla,
9325 2) Branch Conditional: bc, bca, bcl, bcla,
9326 3) Branch Conditional to Link Register: bclr, bclrl,
9327 where (2) and (3) have BO=0x14 making them unconditional,
9328 prevent the bad prefetch because the prefetch itself is
9329 affected by these instructions. This happens even if the
9330 instruction is not executed.
9331
9332 A bctr example:
9333 .
9334 . lis 9,new_page@ha
9335 . addi 9,9,new_page@l
9336 . mtctr 9
9337 . bctr
9338 . nop
9339 . nop
9340 . new_page:
9341 .
9342 The bctr is not predicted taken due to ctr not being
9343 ready, so prefetch continues on past the bctr into the
9344 new page which might have stale instructions. If they
9345 fail to be flushed, then they will be executed after the
9346 bctr executes. Either of the following modifications
9347 prevent the bad prefetch from happening in the first
9348 place:
9349 .
9350 . lis 9,new_page@ha lis 9,new_page@ha
9351 . addi 9,9,new_page@l addi 9,9,new_page@l
9352 . mtctr 9 mtctr 9
9353 . bctr bctr
9354 . nop b somewhere_else
9355 . b somewhere_else nop
9356 . new_page: new_page:
9357 . */
9358 insn = bfd_get_32 (input_bfd, contents + offset);
9359 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9360 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9361 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9362 || ((insn & (0x3f << 26)) == (19u << 26)
9363 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9364 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9365 continue;
9366
9367 patch_addr = (start_addr + input_section->size
9368 - relax_info->workaround_size);
9369 patch_addr = (patch_addr + 15) & -16;
9370 patch_off = patch_addr - start_addr;
9371 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9372
9373 if (rel != NULL
9374 && rel->r_offset >= offset
9375 && rel->r_offset < offset + 4)
9376 {
9377 /* If the insn we are patching had a reloc, adjust the
9378 reloc r_offset so that the reloc applies to the moved
9379 location. This matters for -r and --emit-relocs. */
9380 if (rel + 1 != relend)
9381 {
9382 Elf_Internal_Rela tmp = *rel;
9383
9384 /* Keep the relocs sorted by r_offset. */
9385 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9386 relend[-1] = tmp;
9387 }
9388 relend[-1].r_offset += patch_off - offset;
9389 }
9390 else
9391 rel = NULL;
9392
9393 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9394 && (insn & 2) == 0 /* relative */)
9395 {
9396 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9397
9398 delta += offset - patch_off;
9399 if (info->relocatable && rel != NULL)
9400 delta = 0;
9401 if (!info->relocatable && rel != NULL)
9402 {
9403 enum elf_ppc_reloc_type r_type;
9404
9405 r_type = ELF32_R_TYPE (relend[-1].r_info);
9406 if (r_type == R_PPC_REL14_BRTAKEN)
9407 insn |= BRANCH_PREDICT_BIT;
9408 else if (r_type == R_PPC_REL14_BRNTAKEN)
9409 insn &= ~BRANCH_PREDICT_BIT;
9410 else
9411 BFD_ASSERT (r_type == R_PPC_REL14);
9412
9413 if ((r_type == R_PPC_REL14_BRTAKEN
9414 || r_type == R_PPC_REL14_BRNTAKEN)
9415 && delta + 0x8000 < 0x10000
9416 && (bfd_signed_vma) delta < 0)
9417 insn ^= BRANCH_PREDICT_BIT;
9418 }
9419 if (delta + 0x8000 < 0x10000)
9420 {
9421 bfd_put_32 (input_bfd,
9422 (insn & ~0xfffc) | (delta & 0xfffc),
9423 contents + patch_off);
9424 patch_off += 4;
9425 bfd_put_32 (input_bfd,
9426 B | ((offset + 4 - patch_off) & 0x3fffffc),
9427 contents + patch_off);
9428 patch_off += 4;
9429 }
9430 else
9431 {
9432 if (rel != NULL)
9433 {
9434 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9435
9436 relend[-1].r_offset += 8;
9437 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9438 }
9439 bfd_put_32 (input_bfd,
9440 (insn & ~0xfffc) | 8,
9441 contents + patch_off);
9442 patch_off += 4;
9443 bfd_put_32 (input_bfd,
9444 B | ((offset + 4 - patch_off) & 0x3fffffc),
9445 contents + patch_off);
9446 patch_off += 4;
9447 bfd_put_32 (input_bfd,
9448 B | ((delta - 8) & 0x3fffffc),
9449 contents + patch_off);
9450 patch_off += 4;
9451 }
9452 }
9453 else
9454 {
9455 bfd_put_32 (input_bfd, insn, contents + patch_off);
9456 patch_off += 4;
9457 bfd_put_32 (input_bfd,
9458 B | ((offset + 4 - patch_off) & 0x3fffffc),
9459 contents + patch_off);
9460 patch_off += 4;
9461 }
9462 BFD_ASSERT (patch_off <= input_section->size);
9463 relax_info->workaround_size = input_section->size - patch_off;
9464 }
9465 }
9466
9467 return ret;
9468 }
9469 \f
9470 /* Finish up dynamic symbol handling. We set the contents of various
9471 dynamic sections here. */
9472
9473 static bfd_boolean
9474 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9475 struct bfd_link_info *info,
9476 struct elf_link_hash_entry *h,
9477 Elf_Internal_Sym *sym)
9478 {
9479 struct ppc_elf_link_hash_table *htab;
9480 struct plt_entry *ent;
9481 bfd_boolean doneone;
9482
9483 #ifdef DEBUG
9484 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9485 h->root.root.string);
9486 #endif
9487
9488 htab = ppc_elf_hash_table (info);
9489 BFD_ASSERT (htab->elf.dynobj != NULL);
9490
9491 doneone = FALSE;
9492 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9493 if (ent->plt.offset != (bfd_vma) -1)
9494 {
9495 if (!doneone)
9496 {
9497 Elf_Internal_Rela rela;
9498 bfd_byte *loc;
9499 bfd_vma reloc_index;
9500
9501 if (htab->plt_type == PLT_NEW
9502 || !htab->elf.dynamic_sections_created
9503 || h->dynindx == -1)
9504 reloc_index = ent->plt.offset / 4;
9505 else
9506 {
9507 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9508 / htab->plt_slot_size);
9509 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9510 && htab->plt_type == PLT_OLD)
9511 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9512 }
9513
9514 /* This symbol has an entry in the procedure linkage table.
9515 Set it up. */
9516 if (htab->plt_type == PLT_VXWORKS
9517 && htab->elf.dynamic_sections_created
9518 && h->dynindx != -1)
9519 {
9520 bfd_vma got_offset;
9521 const bfd_vma *plt_entry;
9522
9523 /* The first three entries in .got.plt are reserved. */
9524 got_offset = (reloc_index + 3) * 4;
9525
9526 /* Use the right PLT. */
9527 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9528 : ppc_elf_vxworks_plt_entry;
9529
9530 /* Fill in the .plt on VxWorks. */
9531 if (info->shared)
9532 {
9533 bfd_put_32 (output_bfd,
9534 plt_entry[0] | PPC_HA (got_offset),
9535 htab->plt->contents + ent->plt.offset + 0);
9536 bfd_put_32 (output_bfd,
9537 plt_entry[1] | PPC_LO (got_offset),
9538 htab->plt->contents + ent->plt.offset + 4);
9539 }
9540 else
9541 {
9542 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9543
9544 bfd_put_32 (output_bfd,
9545 plt_entry[0] | PPC_HA (got_loc),
9546 htab->plt->contents + ent->plt.offset + 0);
9547 bfd_put_32 (output_bfd,
9548 plt_entry[1] | PPC_LO (got_loc),
9549 htab->plt->contents + ent->plt.offset + 4);
9550 }
9551
9552 bfd_put_32 (output_bfd, plt_entry[2],
9553 htab->plt->contents + ent->plt.offset + 8);
9554 bfd_put_32 (output_bfd, plt_entry[3],
9555 htab->plt->contents + ent->plt.offset + 12);
9556
9557 /* This instruction is an immediate load. The value loaded is
9558 the byte offset of the R_PPC_JMP_SLOT relocation from the
9559 start of the .rela.plt section. The value is stored in the
9560 low-order 16 bits of the load instruction. */
9561 /* NOTE: It appears that this is now an index rather than a
9562 prescaled offset. */
9563 bfd_put_32 (output_bfd,
9564 plt_entry[4] | reloc_index,
9565 htab->plt->contents + ent->plt.offset + 16);
9566 /* This instruction is a PC-relative branch whose target is
9567 the start of the PLT section. The address of this branch
9568 instruction is 20 bytes beyond the start of this PLT entry.
9569 The address is encoded in bits 6-29, inclusive. The value
9570 stored is right-shifted by two bits, permitting a 26-bit
9571 offset. */
9572 bfd_put_32 (output_bfd,
9573 (plt_entry[5]
9574 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9575 htab->plt->contents + ent->plt.offset + 20);
9576 bfd_put_32 (output_bfd, plt_entry[6],
9577 htab->plt->contents + ent->plt.offset + 24);
9578 bfd_put_32 (output_bfd, plt_entry[7],
9579 htab->plt->contents + ent->plt.offset + 28);
9580
9581 /* Fill in the GOT entry corresponding to this PLT slot with
9582 the address immediately after the "bctr" instruction
9583 in this PLT entry. */
9584 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9585 + htab->plt->output_offset
9586 + ent->plt.offset + 16),
9587 htab->sgotplt->contents + got_offset);
9588
9589 if (!info->shared)
9590 {
9591 /* Fill in a couple of entries in .rela.plt.unloaded. */
9592 loc = htab->srelplt2->contents
9593 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9594 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9595 * sizeof (Elf32_External_Rela));
9596
9597 /* Provide the @ha relocation for the first instruction. */
9598 rela.r_offset = (htab->plt->output_section->vma
9599 + htab->plt->output_offset
9600 + ent->plt.offset + 2);
9601 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9602 R_PPC_ADDR16_HA);
9603 rela.r_addend = got_offset;
9604 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9605 loc += sizeof (Elf32_External_Rela);
9606
9607 /* Provide the @l relocation for the second instruction. */
9608 rela.r_offset = (htab->plt->output_section->vma
9609 + htab->plt->output_offset
9610 + ent->plt.offset + 6);
9611 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9612 R_PPC_ADDR16_LO);
9613 rela.r_addend = got_offset;
9614 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9615 loc += sizeof (Elf32_External_Rela);
9616
9617 /* Provide a relocation for the GOT entry corresponding to this
9618 PLT slot. Point it at the middle of the .plt entry. */
9619 rela.r_offset = (htab->sgotplt->output_section->vma
9620 + htab->sgotplt->output_offset
9621 + got_offset);
9622 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9623 R_PPC_ADDR32);
9624 rela.r_addend = ent->plt.offset + 16;
9625 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9626 }
9627
9628 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9629 In particular, the offset for the relocation is not the
9630 address of the PLT entry for this function, as specified
9631 by the ABI. Instead, the offset is set to the address of
9632 the GOT slot for this function. See EABI 4.4.4.1. */
9633 rela.r_offset = (htab->sgotplt->output_section->vma
9634 + htab->sgotplt->output_offset
9635 + got_offset);
9636
9637 }
9638 else
9639 {
9640 asection *splt = htab->plt;
9641 if (!htab->elf.dynamic_sections_created
9642 || h->dynindx == -1)
9643 splt = htab->iplt;
9644
9645 rela.r_offset = (splt->output_section->vma
9646 + splt->output_offset
9647 + ent->plt.offset);
9648 if (htab->plt_type == PLT_OLD
9649 || !htab->elf.dynamic_sections_created
9650 || h->dynindx == -1)
9651 {
9652 /* We don't need to fill in the .plt. The ppc dynamic
9653 linker will fill it in. */
9654 }
9655 else
9656 {
9657 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9658 + htab->glink->output_section->vma
9659 + htab->glink->output_offset);
9660 bfd_put_32 (output_bfd, val,
9661 splt->contents + ent->plt.offset);
9662 }
9663 }
9664
9665 /* Fill in the entry in the .rela.plt section. */
9666 rela.r_addend = 0;
9667 if (!htab->elf.dynamic_sections_created
9668 || h->dynindx == -1)
9669 {
9670 BFD_ASSERT (h->type == STT_GNU_IFUNC
9671 && h->def_regular
9672 && (h->root.type == bfd_link_hash_defined
9673 || h->root.type == bfd_link_hash_defweak));
9674 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9675 rela.r_addend = SYM_VAL (h);
9676 }
9677 else
9678 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9679
9680 if (!htab->elf.dynamic_sections_created
9681 || h->dynindx == -1)
9682 loc = (htab->reliplt->contents
9683 + (htab->reliplt->reloc_count++
9684 * sizeof (Elf32_External_Rela)));
9685 else
9686 loc = (htab->relplt->contents
9687 + reloc_index * sizeof (Elf32_External_Rela));
9688 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9689
9690 if (!h->def_regular)
9691 {
9692 /* Mark the symbol as undefined, rather than as
9693 defined in the .plt section. Leave the value if
9694 there were any relocations where pointer equality
9695 matters (this is a clue for the dynamic linker, to
9696 make function pointer comparisons work between an
9697 application and shared library), otherwise set it
9698 to zero. */
9699 sym->st_shndx = SHN_UNDEF;
9700 if (!h->pointer_equality_needed)
9701 sym->st_value = 0;
9702 else if (!h->ref_regular_nonweak)
9703 {
9704 /* This breaks function pointer comparisons, but
9705 that is better than breaking tests for a NULL
9706 function pointer. */
9707 sym->st_value = 0;
9708 }
9709 }
9710 else if (h->type == STT_GNU_IFUNC
9711 && !info->shared)
9712 {
9713 /* Set the value of ifunc symbols in a non-pie
9714 executable to the glink entry. This is to avoid
9715 text relocations. We can't do this for ifunc in
9716 allocate_dynrelocs, as we do for normal dynamic
9717 function symbols with plt entries, because we need
9718 to keep the original value around for the ifunc
9719 relocation. */
9720 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9721 (output_bfd, htab->glink->output_section));
9722 sym->st_value = (ent->glink_offset
9723 + htab->glink->output_offset
9724 + htab->glink->output_section->vma);
9725 }
9726 doneone = TRUE;
9727 }
9728
9729 if (htab->plt_type == PLT_NEW
9730 || !htab->elf.dynamic_sections_created
9731 || h->dynindx == -1)
9732 {
9733 unsigned char *p;
9734 asection *splt = htab->plt;
9735 if (!htab->elf.dynamic_sections_created
9736 || h->dynindx == -1)
9737 splt = htab->iplt;
9738
9739 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9740
9741 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9742 {
9743 bfd_put_32 (output_bfd, LWZ_11_3, p);
9744 p += 4;
9745 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9746 p += 4;
9747 bfd_put_32 (output_bfd, MR_0_3, p);
9748 p += 4;
9749 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9750 p += 4;
9751 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9752 p += 4;
9753 bfd_put_32 (output_bfd, BEQLR, p);
9754 p += 4;
9755 bfd_put_32 (output_bfd, MR_3_0, p);
9756 p += 4;
9757 bfd_put_32 (output_bfd, NOP, p);
9758 p += 4;
9759 }
9760
9761 write_glink_stub (ent, splt, p, info);
9762
9763 if (!info->shared)
9764 /* We only need one non-PIC glink stub. */
9765 break;
9766 }
9767 else
9768 break;
9769 }
9770
9771 if (h->needs_copy)
9772 {
9773 asection *s;
9774 Elf_Internal_Rela rela;
9775 bfd_byte *loc;
9776
9777 /* This symbols needs a copy reloc. Set it up. */
9778
9779 #ifdef DEBUG
9780 fprintf (stderr, ", copy");
9781 #endif
9782
9783 BFD_ASSERT (h->dynindx != -1);
9784
9785 if (ppc_elf_hash_entry (h)->has_sda_refs)
9786 s = htab->relsbss;
9787 else
9788 s = htab->relbss;
9789 BFD_ASSERT (s != NULL);
9790
9791 rela.r_offset = SYM_VAL (h);
9792 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9793 rela.r_addend = 0;
9794 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9795 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9796 }
9797
9798 #ifdef DEBUG
9799 fprintf (stderr, "\n");
9800 #endif
9801
9802 return TRUE;
9803 }
9804 \f
9805 static enum elf_reloc_type_class
9806 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9807 const asection *rel_sec,
9808 const Elf_Internal_Rela *rela)
9809 {
9810 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9811
9812 if (rel_sec == htab->reliplt)
9813 return reloc_class_ifunc;
9814
9815 switch (ELF32_R_TYPE (rela->r_info))
9816 {
9817 case R_PPC_RELATIVE:
9818 return reloc_class_relative;
9819 case R_PPC_JMP_SLOT:
9820 return reloc_class_plt;
9821 case R_PPC_COPY:
9822 return reloc_class_copy;
9823 default:
9824 return reloc_class_normal;
9825 }
9826 }
9827 \f
9828 /* Finish up the dynamic sections. */
9829
9830 static bfd_boolean
9831 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9832 struct bfd_link_info *info)
9833 {
9834 asection *sdyn;
9835 asection *splt;
9836 struct ppc_elf_link_hash_table *htab;
9837 bfd_vma got;
9838 bfd *dynobj;
9839 bfd_boolean ret = TRUE;
9840
9841 #ifdef DEBUG
9842 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9843 #endif
9844
9845 htab = ppc_elf_hash_table (info);
9846 dynobj = elf_hash_table (info)->dynobj;
9847 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9848 if (htab->is_vxworks)
9849 splt = bfd_get_linker_section (dynobj, ".plt");
9850 else
9851 splt = NULL;
9852
9853 got = 0;
9854 if (htab->elf.hgot != NULL)
9855 got = SYM_VAL (htab->elf.hgot);
9856
9857 if (htab->elf.dynamic_sections_created)
9858 {
9859 Elf32_External_Dyn *dyncon, *dynconend;
9860
9861 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9862
9863 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9864 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9865 for (; dyncon < dynconend; dyncon++)
9866 {
9867 Elf_Internal_Dyn dyn;
9868 asection *s;
9869
9870 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9871
9872 switch (dyn.d_tag)
9873 {
9874 case DT_PLTGOT:
9875 if (htab->is_vxworks)
9876 s = htab->sgotplt;
9877 else
9878 s = htab->plt;
9879 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9880 break;
9881
9882 case DT_PLTRELSZ:
9883 dyn.d_un.d_val = htab->relplt->size;
9884 break;
9885
9886 case DT_JMPREL:
9887 s = htab->relplt;
9888 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9889 break;
9890
9891 case DT_PPC_GOT:
9892 dyn.d_un.d_ptr = got;
9893 break;
9894
9895 case DT_RELASZ:
9896 if (htab->is_vxworks)
9897 {
9898 if (htab->relplt)
9899 dyn.d_un.d_ptr -= htab->relplt->size;
9900 break;
9901 }
9902 continue;
9903
9904 default:
9905 if (htab->is_vxworks
9906 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9907 break;
9908 continue;
9909 }
9910
9911 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9912 }
9913 }
9914
9915 if (htab->got != NULL)
9916 {
9917 if (htab->elf.hgot->root.u.def.section == htab->got
9918 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9919 {
9920 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9921
9922 p += htab->elf.hgot->root.u.def.value;
9923 if (htab->plt_type == PLT_OLD)
9924 {
9925 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9926 so that a function can easily find the address of
9927 _GLOBAL_OFFSET_TABLE_. */
9928 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9929 < htab->elf.hgot->root.u.def.section->size);
9930 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9931 }
9932
9933 if (sdyn != NULL)
9934 {
9935 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9936 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9937 < htab->elf.hgot->root.u.def.section->size);
9938 bfd_put_32 (output_bfd, val, p);
9939 }
9940 }
9941 else
9942 {
9943 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9944 htab->elf.hgot->root.root.string,
9945 (htab->sgotplt != NULL
9946 ? htab->sgotplt->name : htab->got->name));
9947 bfd_set_error (bfd_error_bad_value);
9948 ret = FALSE;
9949 }
9950
9951 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9952 }
9953
9954 /* Fill in the first entry in the VxWorks procedure linkage table. */
9955 if (splt && splt->size > 0)
9956 {
9957 /* Use the right PLT. */
9958 const bfd_vma *plt_entry = (info->shared
9959 ? ppc_elf_vxworks_pic_plt0_entry
9960 : ppc_elf_vxworks_plt0_entry);
9961
9962 if (!info->shared)
9963 {
9964 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9965
9966 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9967 splt->contents + 0);
9968 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9969 splt->contents + 4);
9970 }
9971 else
9972 {
9973 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9974 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9975 }
9976 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9977 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9978 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9979 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9980 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9981 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9982
9983 if (! info->shared)
9984 {
9985 Elf_Internal_Rela rela;
9986 bfd_byte *loc;
9987
9988 loc = htab->srelplt2->contents;
9989
9990 /* Output the @ha relocation for the first instruction. */
9991 rela.r_offset = (htab->plt->output_section->vma
9992 + htab->plt->output_offset
9993 + 2);
9994 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9995 rela.r_addend = 0;
9996 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9997 loc += sizeof (Elf32_External_Rela);
9998
9999 /* Output the @l relocation for the second instruction. */
10000 rela.r_offset = (htab->plt->output_section->vma
10001 + htab->plt->output_offset
10002 + 6);
10003 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10004 rela.r_addend = 0;
10005 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10006 loc += sizeof (Elf32_External_Rela);
10007
10008 /* Fix up the remaining relocations. They may have the wrong
10009 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10010 in which symbols were output. */
10011 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10012 {
10013 Elf_Internal_Rela rel;
10014
10015 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10016 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10017 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10018 loc += sizeof (Elf32_External_Rela);
10019
10020 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10021 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10022 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10023 loc += sizeof (Elf32_External_Rela);
10024
10025 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10026 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10027 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10028 loc += sizeof (Elf32_External_Rela);
10029 }
10030 }
10031 }
10032
10033 if (htab->glink != NULL
10034 && htab->glink->contents != NULL
10035 && htab->elf.dynamic_sections_created)
10036 {
10037 unsigned char *p;
10038 unsigned char *endp;
10039 bfd_vma res0;
10040 unsigned int i;
10041
10042 /*
10043 * PIC glink code is the following:
10044 *
10045 * # ith PLT code stub.
10046 * addis 11,30,(plt+(i-1)*4-got)@ha
10047 * lwz 11,(plt+(i-1)*4-got)@l(11)
10048 * mtctr 11
10049 * bctr
10050 *
10051 * # A table of branches, one for each plt entry.
10052 * # The idea is that the plt call stub loads ctr and r11 with these
10053 * # addresses, so (r11 - res_0) gives the plt index * 4.
10054 * res_0: b PLTresolve
10055 * res_1: b PLTresolve
10056 * .
10057 * # Some number of entries towards the end can be nops
10058 * res_n_m3: nop
10059 * res_n_m2: nop
10060 * res_n_m1:
10061 *
10062 * PLTresolve:
10063 * addis 11,11,(1f-res_0)@ha
10064 * mflr 0
10065 * bcl 20,31,1f
10066 * 1: addi 11,11,(1b-res_0)@l
10067 * mflr 12
10068 * mtlr 0
10069 * sub 11,11,12 # r11 = index * 4
10070 * addis 12,12,(got+4-1b)@ha
10071 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10072 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10073 * mtctr 0
10074 * add 0,11,11
10075 * add 11,0,11 # r11 = index * 12 = reloc offset.
10076 * bctr
10077 */
10078 static const unsigned int pic_plt_resolve[] =
10079 {
10080 ADDIS_11_11,
10081 MFLR_0,
10082 BCL_20_31,
10083 ADDI_11_11,
10084 MFLR_12,
10085 MTLR_0,
10086 SUB_11_11_12,
10087 ADDIS_12_12,
10088 LWZ_0_12,
10089 LWZ_12_12,
10090 MTCTR_0,
10091 ADD_0_11_11,
10092 ADD_11_0_11,
10093 BCTR,
10094 NOP,
10095 NOP
10096 };
10097
10098 /*
10099 * Non-PIC glink code is a little simpler.
10100 *
10101 * # ith PLT code stub.
10102 * lis 11,(plt+(i-1)*4)@ha
10103 * lwz 11,(plt+(i-1)*4)@l(11)
10104 * mtctr 11
10105 * bctr
10106 *
10107 * The branch table is the same, then comes
10108 *
10109 * PLTresolve:
10110 * lis 12,(got+4)@ha
10111 * addis 11,11,(-res_0)@ha
10112 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10113 * addi 11,11,(-res_0)@l # r11 = index * 4
10114 * mtctr 0
10115 * add 0,11,11
10116 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10117 * add 11,0,11 # r11 = index * 12 = reloc offset.
10118 * bctr
10119 */
10120 static const unsigned int plt_resolve[] =
10121 {
10122 LIS_12,
10123 ADDIS_11_11,
10124 LWZ_0_12,
10125 ADDI_11_11,
10126 MTCTR_0,
10127 ADD_0_11_11,
10128 LWZ_12_12,
10129 ADD_11_0_11,
10130 BCTR,
10131 NOP,
10132 NOP,
10133 NOP,
10134 NOP,
10135 NOP,
10136 NOP,
10137 NOP
10138 };
10139
10140 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10141 abort ();
10142 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10143 abort ();
10144
10145 /* Build the branch table, one for each plt entry (less one),
10146 and perhaps some padding. */
10147 p = htab->glink->contents;
10148 p += htab->glink_pltresolve;
10149 endp = htab->glink->contents;
10150 endp += htab->glink->size - GLINK_PLTRESOLVE;
10151 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10152 {
10153 bfd_put_32 (output_bfd, B + endp - p, p);
10154 p += 4;
10155 }
10156 while (p < endp)
10157 {
10158 bfd_put_32 (output_bfd, NOP, p);
10159 p += 4;
10160 }
10161
10162 res0 = (htab->glink_pltresolve
10163 + htab->glink->output_section->vma
10164 + htab->glink->output_offset);
10165
10166 if (htab->params->ppc476_workaround)
10167 {
10168 /* Ensure that a call stub at the end of a page doesn't
10169 result in prefetch over the end of the page into the
10170 glink branch table. */
10171 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10172 bfd_vma page_addr;
10173 bfd_vma glink_start = (htab->glink->output_section->vma
10174 + htab->glink->output_offset);
10175
10176 for (page_addr = res0 & -pagesize;
10177 page_addr > glink_start;
10178 page_addr -= pagesize)
10179 {
10180 /* We have a plt call stub that may need fixing. */
10181 bfd_byte *loc;
10182 unsigned int insn;
10183
10184 loc = htab->glink->contents + page_addr - 4 - glink_start;
10185 insn = bfd_get_32 (output_bfd, loc);
10186 if (insn == BCTR)
10187 {
10188 /* By alignment, we know that there must be at least
10189 one other call stub before this one. */
10190 insn = bfd_get_32 (output_bfd, loc - 16);
10191 if (insn == BCTR)
10192 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10193 else
10194 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10195 }
10196 }
10197 }
10198
10199 /* Last comes the PLTresolve stub. */
10200 if (info->shared)
10201 {
10202 bfd_vma bcl;
10203
10204 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10205 {
10206 unsigned int insn = pic_plt_resolve[i];
10207
10208 if (htab->params->ppc476_workaround && insn == NOP)
10209 insn = BA + 0;
10210 bfd_put_32 (output_bfd, insn, p);
10211 p += 4;
10212 }
10213 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10214
10215 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10216 + htab->glink->output_section->vma
10217 + htab->glink->output_offset);
10218
10219 bfd_put_32 (output_bfd,
10220 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10221 bfd_put_32 (output_bfd,
10222 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10223 bfd_put_32 (output_bfd,
10224 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10225 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10226 {
10227 bfd_put_32 (output_bfd,
10228 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10229 bfd_put_32 (output_bfd,
10230 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10231 }
10232 else
10233 {
10234 bfd_put_32 (output_bfd,
10235 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10236 bfd_put_32 (output_bfd,
10237 LWZ_12_12 + 4, p + 9*4);
10238 }
10239 }
10240 else
10241 {
10242 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10243 {
10244 unsigned int insn = plt_resolve[i];
10245
10246 if (htab->params->ppc476_workaround && insn == NOP)
10247 insn = BA + 0;
10248 bfd_put_32 (output_bfd, insn, p);
10249 p += 4;
10250 }
10251 p -= 4 * ARRAY_SIZE (plt_resolve);
10252
10253 bfd_put_32 (output_bfd,
10254 LIS_12 + PPC_HA (got + 4), p + 0*4);
10255 bfd_put_32 (output_bfd,
10256 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10257 bfd_put_32 (output_bfd,
10258 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10259 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10260 {
10261 bfd_put_32 (output_bfd,
10262 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10263 bfd_put_32 (output_bfd,
10264 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10265 }
10266 else
10267 {
10268 bfd_put_32 (output_bfd,
10269 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10270 bfd_put_32 (output_bfd,
10271 LWZ_12_12 + 4, p + 6*4);
10272 }
10273 }
10274 }
10275
10276 if (htab->glink_eh_frame != NULL
10277 && htab->glink_eh_frame->contents != NULL)
10278 {
10279 unsigned char *p = htab->glink_eh_frame->contents;
10280 bfd_vma val;
10281
10282 p += sizeof (glink_eh_frame_cie);
10283 /* FDE length. */
10284 p += 4;
10285 /* CIE pointer. */
10286 p += 4;
10287 /* Offset to .glink. */
10288 val = (htab->glink->output_section->vma
10289 + htab->glink->output_offset);
10290 val -= (htab->glink_eh_frame->output_section->vma
10291 + htab->glink_eh_frame->output_offset);
10292 val -= p - htab->glink_eh_frame->contents;
10293 bfd_put_32 (htab->elf.dynobj, val, p);
10294
10295 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10296 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10297 htab->glink_eh_frame,
10298 htab->glink_eh_frame->contents))
10299 return FALSE;
10300 }
10301
10302 return ret;
10303 }
10304 \f
10305 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10306 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10307 #define TARGET_BIG_SYM powerpc_elf32_vec
10308 #define TARGET_BIG_NAME "elf32-powerpc"
10309 #define ELF_ARCH bfd_arch_powerpc
10310 #define ELF_TARGET_ID PPC32_ELF_DATA
10311 #define ELF_MACHINE_CODE EM_PPC
10312 #ifdef __QNXTARGET__
10313 #define ELF_MAXPAGESIZE 0x1000
10314 #else
10315 #define ELF_MAXPAGESIZE 0x10000
10316 #endif
10317 #define ELF_MINPAGESIZE 0x1000
10318 #define ELF_COMMONPAGESIZE 0x1000
10319 #define elf_info_to_howto ppc_elf_info_to_howto
10320
10321 #ifdef EM_CYGNUS_POWERPC
10322 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10323 #endif
10324
10325 #ifdef EM_PPC_OLD
10326 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10327 #endif
10328
10329 #define elf_backend_plt_not_loaded 1
10330 #define elf_backend_can_gc_sections 1
10331 #define elf_backend_can_refcount 1
10332 #define elf_backend_rela_normal 1
10333 #define elf_backend_caches_rawsize 1
10334
10335 #define bfd_elf32_mkobject ppc_elf_mkobject
10336 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10337 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10338 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10339 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10340 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10341 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10342 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10343
10344 #define elf_backend_object_p ppc_elf_object_p
10345 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10346 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10347 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10348 #define elf_backend_relocate_section ppc_elf_relocate_section
10349 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10350 #define elf_backend_check_relocs ppc_elf_check_relocs
10351 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10352 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10353 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10354 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10355 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10356 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10357 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10358 #define elf_backend_fake_sections ppc_elf_fake_sections
10359 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10360 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10361 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10362 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10363 #define elf_backend_write_core_note ppc_elf_write_core_note
10364 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10365 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10366 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10367 #define elf_backend_write_section ppc_elf_write_section
10368 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10369 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10370 #define elf_backend_action_discarded ppc_elf_action_discarded
10371 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10372 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10373 #define elf_backend_section_processing ppc_elf_section_processing
10374
10375 #include "elf32-target.h"
10376
10377 /* FreeBSD Target */
10378
10379 #undef TARGET_LITTLE_SYM
10380 #undef TARGET_LITTLE_NAME
10381
10382 #undef TARGET_BIG_SYM
10383 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10384 #undef TARGET_BIG_NAME
10385 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10386
10387 #undef ELF_OSABI
10388 #define ELF_OSABI ELFOSABI_FREEBSD
10389
10390 #undef elf32_bed
10391 #define elf32_bed elf32_powerpc_fbsd_bed
10392
10393 #include "elf32-target.h"
10394
10395 /* VxWorks Target */
10396
10397 #undef TARGET_LITTLE_SYM
10398 #undef TARGET_LITTLE_NAME
10399
10400 #undef TARGET_BIG_SYM
10401 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10402 #undef TARGET_BIG_NAME
10403 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10404
10405 #undef ELF_OSABI
10406
10407 /* VxWorks uses the elf default section flags for .plt. */
10408 static const struct bfd_elf_special_section *
10409 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10410 {
10411 if (sec->name == NULL)
10412 return NULL;
10413
10414 if (strcmp (sec->name, ".plt") == 0)
10415 return _bfd_elf_get_sec_type_attr (abfd, sec);
10416
10417 return ppc_elf_get_sec_type_attr (abfd, sec);
10418 }
10419
10420 /* Like ppc_elf_link_hash_table_create, but overrides
10421 appropriately for VxWorks. */
10422 static struct bfd_link_hash_table *
10423 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10424 {
10425 struct bfd_link_hash_table *ret;
10426
10427 ret = ppc_elf_link_hash_table_create (abfd);
10428 if (ret)
10429 {
10430 struct ppc_elf_link_hash_table *htab
10431 = (struct ppc_elf_link_hash_table *)ret;
10432 htab->is_vxworks = 1;
10433 htab->plt_type = PLT_VXWORKS;
10434 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10435 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10436 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10437 }
10438 return ret;
10439 }
10440
10441 /* Tweak magic VxWorks symbols as they are loaded. */
10442 static bfd_boolean
10443 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10444 struct bfd_link_info *info,
10445 Elf_Internal_Sym *sym,
10446 const char **namep ATTRIBUTE_UNUSED,
10447 flagword *flagsp ATTRIBUTE_UNUSED,
10448 asection **secp,
10449 bfd_vma *valp)
10450 {
10451 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10452 valp))
10453 return FALSE;
10454
10455 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10456 }
10457
10458 static void
10459 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10460 {
10461 ppc_elf_final_write_processing(abfd, linker);
10462 elf_vxworks_final_write_processing(abfd, linker);
10463 }
10464
10465 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10466 define it. */
10467 #undef elf_backend_want_plt_sym
10468 #define elf_backend_want_plt_sym 1
10469 #undef elf_backend_want_got_plt
10470 #define elf_backend_want_got_plt 1
10471 #undef elf_backend_got_symbol_offset
10472 #define elf_backend_got_symbol_offset 0
10473 #undef elf_backend_plt_not_loaded
10474 #define elf_backend_plt_not_loaded 0
10475 #undef elf_backend_plt_readonly
10476 #define elf_backend_plt_readonly 1
10477 #undef elf_backend_got_header_size
10478 #define elf_backend_got_header_size 12
10479
10480 #undef bfd_elf32_get_synthetic_symtab
10481
10482 #undef bfd_elf32_bfd_link_hash_table_create
10483 #define bfd_elf32_bfd_link_hash_table_create \
10484 ppc_elf_vxworks_link_hash_table_create
10485 #undef elf_backend_add_symbol_hook
10486 #define elf_backend_add_symbol_hook \
10487 ppc_elf_vxworks_add_symbol_hook
10488 #undef elf_backend_link_output_symbol_hook
10489 #define elf_backend_link_output_symbol_hook \
10490 elf_vxworks_link_output_symbol_hook
10491 #undef elf_backend_final_write_processing
10492 #define elf_backend_final_write_processing \
10493 ppc_elf_vxworks_final_write_processing
10494 #undef elf_backend_get_sec_type_attr
10495 #define elf_backend_get_sec_type_attr \
10496 ppc_elf_vxworks_get_sec_type_attr
10497 #undef elf_backend_emit_relocs
10498 #define elf_backend_emit_relocs \
10499 elf_vxworks_emit_relocs
10500
10501 #undef elf32_bed
10502 #define elf32_bed ppc_elf_vxworks_bed
10503 #undef elf_backend_post_process_headers
10504
10505 #include "elf32-target.h"
GDB Binutils - Deliverables
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