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Don't segfault or assert on NULL tls_sec
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2015 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831 \f
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 unsigned int r_type;
2023
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 r_type = ELF32_R_TYPE (dst->r_info);
2029 if (r_type >= R_PPC_max)
2030 {
2031 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2032 abfd, r_type);
2033 bfd_set_error (bfd_error_bad_value);
2034 r_type = R_PPC_NONE;
2035 }
2036 cache_ptr->howto = ppc_elf_howto_table[r_type];
2037
2038 /* Just because the above assert didn't trigger doesn't mean that
2039 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2040 if (!cache_ptr->howto)
2041 {
2042 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2043 abfd, r_type);
2044 bfd_set_error (bfd_error_bad_value);
2045
2046 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2047 }
2048 }
2049
2050 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2051
2052 static bfd_reloc_status_type
2053 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2054 arelent *reloc_entry,
2055 asymbol *symbol,
2056 void *data ATTRIBUTE_UNUSED,
2057 asection *input_section,
2058 bfd *output_bfd,
2059 char **error_message ATTRIBUTE_UNUSED)
2060 {
2061 bfd_vma relocation;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 if (bfd_is_com_section (symbol->section))
2070 relocation = 0;
2071 else
2072 relocation = symbol->value;
2073
2074 relocation += symbol->section->output_section->vma;
2075 relocation += symbol->section->output_offset;
2076 relocation += reloc_entry->addend;
2077 if (reloc_entry->howto->pc_relative)
2078 relocation -= reloc_entry->address;
2079
2080 reloc_entry->addend += (relocation & 0x8000) << 1;
2081
2082 return bfd_reloc_continue;
2083 }
2084
2085 static bfd_reloc_status_type
2086 ppc_elf_unhandled_reloc (bfd *abfd,
2087 arelent *reloc_entry,
2088 asymbol *symbol,
2089 void *data,
2090 asection *input_section,
2091 bfd *output_bfd,
2092 char **error_message)
2093 {
2094 /* If this is a relocatable link (output_bfd test tells us), just
2095 call the generic function. Any adjustment will be done at final
2096 link time. */
2097 if (output_bfd != NULL)
2098 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2099 input_section, output_bfd, error_message);
2100
2101 if (error_message != NULL)
2102 {
2103 static char buf[60];
2104 sprintf (buf, _("generic linker can't handle %s"),
2105 reloc_entry->howto->name);
2106 *error_message = buf;
2107 }
2108 return bfd_reloc_dangerous;
2109 }
2110 \f
2111 /* Sections created by the linker. */
2112
2113 typedef struct elf_linker_section
2114 {
2115 /* Pointer to the bfd section. */
2116 asection *section;
2117 /* Section name. */
2118 const char *name;
2119 /* Associated bss section name. */
2120 const char *bss_name;
2121 /* Associated symbol name. */
2122 const char *sym_name;
2123 /* Associated symbol. */
2124 struct elf_link_hash_entry *sym;
2125 } elf_linker_section_t;
2126
2127 /* Linked list of allocated pointer entries. This hangs off of the
2128 symbol lists, and provides allows us to return different pointers,
2129 based on different addend's. */
2130
2131 typedef struct elf_linker_section_pointers
2132 {
2133 /* next allocated pointer for this symbol */
2134 struct elf_linker_section_pointers *next;
2135 /* offset of pointer from beginning of section */
2136 bfd_vma offset;
2137 /* addend used */
2138 bfd_vma addend;
2139 /* which linker section this is */
2140 elf_linker_section_t *lsect;
2141 } elf_linker_section_pointers_t;
2142
2143 struct ppc_elf_obj_tdata
2144 {
2145 struct elf_obj_tdata elf;
2146
2147 /* A mapping from local symbols to offsets into the various linker
2148 sections added. This is index by the symbol index. */
2149 elf_linker_section_pointers_t **linker_section_pointers;
2150
2151 /* Flags used to auto-detect plt type. */
2152 unsigned int makes_plt_call : 1;
2153 unsigned int has_rel16 : 1;
2154 };
2155
2156 #define ppc_elf_tdata(bfd) \
2157 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2158
2159 #define elf_local_ptr_offsets(bfd) \
2160 (ppc_elf_tdata (bfd)->linker_section_pointers)
2161
2162 #define is_ppc_elf(bfd) \
2163 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2164 && elf_object_id (bfd) == PPC32_ELF_DATA)
2165
2166 /* Override the generic function because we store some extras. */
2167
2168 static bfd_boolean
2169 ppc_elf_mkobject (bfd *abfd)
2170 {
2171 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2172 PPC32_ELF_DATA);
2173 }
2174
2175 /* Fix bad default arch selected for a 32 bit input bfd when the
2176 default is 64 bit. */
2177
2178 static bfd_boolean
2179 ppc_elf_object_p (bfd *abfd)
2180 {
2181 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2182 {
2183 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2184
2185 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2186 {
2187 /* Relies on arch after 64 bit default being 32 bit default. */
2188 abfd->arch_info = abfd->arch_info->next;
2189 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2190 }
2191 }
2192 return TRUE;
2193 }
2194
2195 /* Function to set whether a module needs the -mrelocatable bit set. */
2196
2197 static bfd_boolean
2198 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2199 {
2200 BFD_ASSERT (!elf_flags_init (abfd)
2201 || elf_elfheader (abfd)->e_flags == flags);
2202
2203 elf_elfheader (abfd)->e_flags = flags;
2204 elf_flags_init (abfd) = TRUE;
2205 return TRUE;
2206 }
2207
2208 /* Support for core dump NOTE sections. */
2209
2210 static bfd_boolean
2211 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2212 {
2213 int offset;
2214 unsigned int size;
2215
2216 switch (note->descsz)
2217 {
2218 default:
2219 return FALSE;
2220
2221 case 268: /* Linux/PPC. */
2222 /* pr_cursig */
2223 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2224
2225 /* pr_pid */
2226 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2227
2228 /* pr_reg */
2229 offset = 72;
2230 size = 192;
2231
2232 break;
2233 }
2234
2235 /* Make a ".reg/999" section. */
2236 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2237 size, note->descpos + offset);
2238 }
2239
2240 static bfd_boolean
2241 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2242 {
2243 switch (note->descsz)
2244 {
2245 default:
2246 return FALSE;
2247
2248 case 128: /* Linux/PPC elf_prpsinfo. */
2249 elf_tdata (abfd)->core->pid
2250 = bfd_get_32 (abfd, note->descdata + 16);
2251 elf_tdata (abfd)->core->program
2252 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2253 elf_tdata (abfd)->core->command
2254 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2255 }
2256
2257 /* Note that for some reason, a spurious space is tacked
2258 onto the end of the args in some (at least one anyway)
2259 implementations, so strip it off if it exists. */
2260
2261 {
2262 char *command = elf_tdata (abfd)->core->command;
2263 int n = strlen (command);
2264
2265 if (0 < n && command[n - 1] == ' ')
2266 command[n - 1] = '\0';
2267 }
2268
2269 return TRUE;
2270 }
2271
2272 char *
2273 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2274 const struct elf_internal_linux_prpsinfo *prpsinfo)
2275 {
2276 struct elf_external_ppc_linux_prpsinfo32 data;
2277
2278 memset (&data, 0, sizeof (data));
2279 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2280
2281 return elfcore_write_note (abfd, buf, bufsiz,
2282 "CORE", NT_PRPSINFO, &data, sizeof (data));
2283 }
2284
2285 static char *
2286 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2287 {
2288 switch (note_type)
2289 {
2290 default:
2291 return NULL;
2292
2293 case NT_PRPSINFO:
2294 {
2295 char data[128];
2296 va_list ap;
2297
2298 va_start (ap, note_type);
2299 memset (data, 0, sizeof (data));
2300 strncpy (data + 32, va_arg (ap, const char *), 16);
2301 strncpy (data + 48, va_arg (ap, const char *), 80);
2302 va_end (ap);
2303 return elfcore_write_note (abfd, buf, bufsiz,
2304 "CORE", note_type, data, sizeof (data));
2305 }
2306
2307 case NT_PRSTATUS:
2308 {
2309 char data[268];
2310 va_list ap;
2311 long pid;
2312 int cursig;
2313 const void *greg;
2314
2315 va_start (ap, note_type);
2316 memset (data, 0, 72);
2317 pid = va_arg (ap, long);
2318 bfd_put_32 (abfd, pid, data + 24);
2319 cursig = va_arg (ap, int);
2320 bfd_put_16 (abfd, cursig, data + 12);
2321 greg = va_arg (ap, const void *);
2322 memcpy (data + 72, greg, 192);
2323 memset (data + 264, 0, 4);
2324 va_end (ap);
2325 return elfcore_write_note (abfd, buf, bufsiz,
2326 "CORE", note_type, data, sizeof (data));
2327 }
2328 }
2329 }
2330
2331 static flagword
2332 ppc_elf_lookup_section_flags (char *flag_name)
2333 {
2334
2335 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2336 return SHF_PPC_VLE;
2337
2338 return 0;
2339 }
2340
2341 /* Add the VLE flag if required. */
2342
2343 bfd_boolean
2344 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2345 {
2346 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2347 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2348 shdr->sh_flags |= SHF_PPC_VLE;
2349
2350 return TRUE;
2351 }
2352
2353 /* Return address for Ith PLT stub in section PLT, for relocation REL
2354 or (bfd_vma) -1 if it should not be included. */
2355
2356 static bfd_vma
2357 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2358 const asection *plt ATTRIBUTE_UNUSED,
2359 const arelent *rel)
2360 {
2361 return rel->address;
2362 }
2363
2364 /* Handle a PowerPC specific section when reading an object file. This
2365 is called when bfd_section_from_shdr finds a section with an unknown
2366 type. */
2367
2368 static bfd_boolean
2369 ppc_elf_section_from_shdr (bfd *abfd,
2370 Elf_Internal_Shdr *hdr,
2371 const char *name,
2372 int shindex)
2373 {
2374 asection *newsect;
2375 flagword flags;
2376
2377 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2378 return FALSE;
2379
2380 newsect = hdr->bfd_section;
2381 flags = bfd_get_section_flags (abfd, newsect);
2382 if (hdr->sh_flags & SHF_EXCLUDE)
2383 flags |= SEC_EXCLUDE;
2384
2385 if (hdr->sh_type == SHT_ORDERED)
2386 flags |= SEC_SORT_ENTRIES;
2387
2388 bfd_set_section_flags (abfd, newsect, flags);
2389 return TRUE;
2390 }
2391
2392 /* Set up any other section flags and such that may be necessary. */
2393
2394 static bfd_boolean
2395 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2396 Elf_Internal_Shdr *shdr,
2397 asection *asect)
2398 {
2399 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2400 shdr->sh_type = SHT_ORDERED;
2401
2402 return TRUE;
2403 }
2404
2405 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2406 need to bump up the number of section headers. */
2407
2408 static int
2409 ppc_elf_additional_program_headers (bfd *abfd,
2410 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2411 {
2412 asection *s;
2413 int ret = 0;
2414
2415 s = bfd_get_section_by_name (abfd, ".sbss2");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2420 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2421 ++ret;
2422
2423 return ret;
2424 }
2425
2426 /* Modify the segment map for VLE executables. */
2427
2428 bfd_boolean
2429 ppc_elf_modify_segment_map (bfd *abfd,
2430 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2431 {
2432 struct elf_segment_map *m, *n;
2433 bfd_size_type amt;
2434 unsigned int j, k;
2435 bfd_boolean sect0_vle, sectj_vle;
2436
2437 /* At this point in the link, output sections have already been sorted by
2438 LMA and assigned to segments. All that is left to do is to ensure
2439 there is no mixing of VLE & non-VLE sections in a text segment.
2440 If we find that case, we split the segment.
2441 We maintain the original output section order. */
2442
2443 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2444 {
2445 if (m->count == 0)
2446 continue;
2447
2448 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2449 for (j = 1; j < m->count; ++j)
2450 {
2451 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2452
2453 if (sectj_vle != sect0_vle)
2454 break;
2455 }
2456 if (j >= m->count)
2457 continue;
2458
2459 /* sections 0..j-1 stay in this (current) segment,
2460 the remainder are put in a new segment.
2461 The scan resumes with the new segment. */
2462
2463 /* Fix the new segment. */
2464 amt = sizeof (struct elf_segment_map);
2465 amt += (m->count - j - 1) * sizeof (asection *);
2466 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2467 if (n == NULL)
2468 return FALSE;
2469
2470 n->p_type = PT_LOAD;
2471 n->p_flags = PF_X | PF_R;
2472 if (sectj_vle)
2473 n->p_flags |= PF_PPC_VLE;
2474 n->count = m->count - j;
2475 for (k = 0; k < n->count; ++k)
2476 {
2477 n->sections[k] = m->sections[j+k];
2478 m->sections[j+k] = NULL;
2479 }
2480 n->next = m->next;
2481 m->next = n;
2482
2483 /* Fix the current segment */
2484 m->count = j;
2485 }
2486
2487 return TRUE;
2488 }
2489
2490 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2491 .PPC.EMB.sbss0 a normal section, and not a bss section so
2492 that the linker doesn't crater when trying to make more than
2493 2 sections. */
2494
2495 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2496 {
2497 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2498 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2499 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2500 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2501 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2502 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2503 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2504 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2505 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2506 { NULL, 0, 0, 0, 0 }
2507 };
2508
2509 /* This is what we want for new plt/got. */
2510 static struct bfd_elf_special_section ppc_alt_plt =
2511 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2512
2513 static const struct bfd_elf_special_section *
2514 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2515 {
2516 const struct bfd_elf_special_section *ssect;
2517
2518 /* See if this is one of the special sections. */
2519 if (sec->name == NULL)
2520 return NULL;
2521
2522 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2523 sec->use_rela_p);
2524 if (ssect != NULL)
2525 {
2526 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2527 ssect = &ppc_alt_plt;
2528 return ssect;
2529 }
2530
2531 return _bfd_elf_get_sec_type_attr (abfd, sec);
2532 }
2533 \f
2534 /* Very simple linked list structure for recording apuinfo values. */
2535 typedef struct apuinfo_list
2536 {
2537 struct apuinfo_list *next;
2538 unsigned long value;
2539 }
2540 apuinfo_list;
2541
2542 static apuinfo_list *head;
2543 static bfd_boolean apuinfo_set;
2544
2545 static void
2546 apuinfo_list_init (void)
2547 {
2548 head = NULL;
2549 apuinfo_set = FALSE;
2550 }
2551
2552 static void
2553 apuinfo_list_add (unsigned long value)
2554 {
2555 apuinfo_list *entry = head;
2556
2557 while (entry != NULL)
2558 {
2559 if (entry->value == value)
2560 return;
2561 entry = entry->next;
2562 }
2563
2564 entry = bfd_malloc (sizeof (* entry));
2565 if (entry == NULL)
2566 return;
2567
2568 entry->value = value;
2569 entry->next = head;
2570 head = entry;
2571 }
2572
2573 static unsigned
2574 apuinfo_list_length (void)
2575 {
2576 apuinfo_list *entry;
2577 unsigned long count;
2578
2579 for (entry = head, count = 0;
2580 entry;
2581 entry = entry->next)
2582 ++ count;
2583
2584 return count;
2585 }
2586
2587 static inline unsigned long
2588 apuinfo_list_element (unsigned long number)
2589 {
2590 apuinfo_list * entry;
2591
2592 for (entry = head;
2593 entry && number --;
2594 entry = entry->next)
2595 ;
2596
2597 return entry ? entry->value : 0;
2598 }
2599
2600 static void
2601 apuinfo_list_finish (void)
2602 {
2603 apuinfo_list *entry;
2604
2605 for (entry = head; entry;)
2606 {
2607 apuinfo_list *next = entry->next;
2608 free (entry);
2609 entry = next;
2610 }
2611
2612 head = NULL;
2613 }
2614
2615 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2616 #define APUINFO_LABEL "APUinfo"
2617
2618 /* Scan the input BFDs and create a linked list of
2619 the APUinfo values that will need to be emitted. */
2620
2621 static void
2622 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2623 {
2624 bfd *ibfd;
2625 asection *asec;
2626 char *buffer = NULL;
2627 bfd_size_type largest_input_size = 0;
2628 unsigned i;
2629 unsigned long length;
2630 const char *error_message = NULL;
2631
2632 if (link_info == NULL)
2633 return;
2634
2635 apuinfo_list_init ();
2636
2637 /* Read in the input sections contents. */
2638 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2639 {
2640 unsigned long datum;
2641
2642 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2643 if (asec == NULL)
2644 continue;
2645
2646 error_message = _("corrupt %s section in %B");
2647 length = asec->size;
2648 if (length < 20)
2649 goto fail;
2650
2651 apuinfo_set = TRUE;
2652 if (largest_input_size < asec->size)
2653 {
2654 if (buffer)
2655 free (buffer);
2656 largest_input_size = asec->size;
2657 buffer = bfd_malloc (largest_input_size);
2658 if (!buffer)
2659 return;
2660 }
2661
2662 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2663 || (bfd_bread (buffer, length, ibfd) != length))
2664 {
2665 error_message = _("unable to read in %s section from %B");
2666 goto fail;
2667 }
2668
2669 /* Verify the contents of the header. Note - we have to
2670 extract the values this way in order to allow for a
2671 host whose endian-ness is different from the target. */
2672 datum = bfd_get_32 (ibfd, buffer);
2673 if (datum != sizeof APUINFO_LABEL)
2674 goto fail;
2675
2676 datum = bfd_get_32 (ibfd, buffer + 8);
2677 if (datum != 0x2)
2678 goto fail;
2679
2680 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2681 goto fail;
2682
2683 /* Get the number of bytes used for apuinfo entries. */
2684 datum = bfd_get_32 (ibfd, buffer + 4);
2685 if (datum + 20 != length)
2686 goto fail;
2687
2688 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2689 for (i = 0; i < datum; i += 4)
2690 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2691 }
2692
2693 error_message = NULL;
2694
2695 if (apuinfo_set)
2696 {
2697 /* Compute the size of the output section. */
2698 unsigned num_entries = apuinfo_list_length ();
2699
2700 /* Set the output section size, if it exists. */
2701 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2702
2703 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2704 {
2705 ibfd = abfd;
2706 error_message = _("warning: unable to set size of %s section in %B");
2707 }
2708 }
2709
2710 fail:
2711 if (buffer)
2712 free (buffer);
2713
2714 if (error_message)
2715 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2716 }
2717
2718 /* Prevent the output section from accumulating the input sections'
2719 contents. We have already stored this in our linked list structure. */
2720
2721 static bfd_boolean
2722 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2723 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2724 asection *asec,
2725 bfd_byte *contents ATTRIBUTE_UNUSED)
2726 {
2727 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2728 }
2729
2730 /* Finally we can generate the output section. */
2731
2732 static void
2733 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2734 {
2735 bfd_byte *buffer;
2736 asection *asec;
2737 unsigned i;
2738 unsigned num_entries;
2739 bfd_size_type length;
2740
2741 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2742 if (asec == NULL)
2743 return;
2744
2745 if (!apuinfo_set)
2746 return;
2747
2748 length = asec->size;
2749 if (length < 20)
2750 return;
2751
2752 buffer = bfd_malloc (length);
2753 if (buffer == NULL)
2754 {
2755 (*_bfd_error_handler)
2756 (_("failed to allocate space for new APUinfo section."));
2757 return;
2758 }
2759
2760 /* Create the apuinfo header. */
2761 num_entries = apuinfo_list_length ();
2762 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2763 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2764 bfd_put_32 (abfd, 0x2, buffer + 8);
2765 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2766
2767 length = 20;
2768 for (i = 0; i < num_entries; i++)
2769 {
2770 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2771 length += 4;
2772 }
2773
2774 if (length != asec->size)
2775 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2776
2777 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2778 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2779
2780 free (buffer);
2781
2782 apuinfo_list_finish ();
2783 }
2784 \f
2785 static bfd_boolean
2786 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2787 {
2788 bfd_byte buf[GLINK_ENTRY_SIZE];
2789
2790 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2791 return FALSE;
2792
2793 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2794 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2795 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2796 && bfd_get_32 (abfd, buf + 12) == BCTR);
2797 }
2798
2799 static bfd_boolean
2800 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2801 {
2802 bfd_vma vma = *(bfd_vma *) ptr;
2803 return ((section->flags & SEC_ALLOC) != 0
2804 && section->vma <= vma
2805 && vma < section->vma + section->size);
2806 }
2807
2808 static long
2809 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2810 long dynsymcount, asymbol **dynsyms,
2811 asymbol **ret)
2812 {
2813 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2814 asection *plt, *relplt, *dynamic, *glink;
2815 bfd_vma glink_vma = 0;
2816 bfd_vma resolv_vma = 0;
2817 bfd_vma stub_vma;
2818 asymbol *s;
2819 arelent *p;
2820 long count, i;
2821 size_t size;
2822 char *names;
2823 bfd_byte buf[4];
2824
2825 *ret = NULL;
2826
2827 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2828 return 0;
2829
2830 if (dynsymcount <= 0)
2831 return 0;
2832
2833 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2834 if (relplt == NULL)
2835 return 0;
2836
2837 plt = bfd_get_section_by_name (abfd, ".plt");
2838 if (plt == NULL)
2839 return 0;
2840
2841 /* Call common code to handle old-style executable PLTs. */
2842 if (elf_section_flags (plt) & SHF_EXECINSTR)
2843 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2844 dynsymcount, dynsyms, ret);
2845
2846 /* If this object was prelinked, the prelinker stored the address
2847 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2848 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2849 if (dynamic != NULL)
2850 {
2851 bfd_byte *dynbuf, *extdyn, *extdynend;
2852 size_t extdynsize;
2853 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2854
2855 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2856 return -1;
2857
2858 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2859 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2860
2861 extdyn = dynbuf;
2862 extdynend = extdyn + dynamic->size;
2863 for (; extdyn < extdynend; extdyn += extdynsize)
2864 {
2865 Elf_Internal_Dyn dyn;
2866 (*swap_dyn_in) (abfd, extdyn, &dyn);
2867
2868 if (dyn.d_tag == DT_NULL)
2869 break;
2870
2871 if (dyn.d_tag == DT_PPC_GOT)
2872 {
2873 unsigned int g_o_t = dyn.d_un.d_val;
2874 asection *got = bfd_get_section_by_name (abfd, ".got");
2875 if (got != NULL
2876 && bfd_get_section_contents (abfd, got, buf,
2877 g_o_t - got->vma + 4, 4))
2878 glink_vma = bfd_get_32 (abfd, buf);
2879 break;
2880 }
2881 }
2882 free (dynbuf);
2883 }
2884
2885 /* Otherwise we read the first plt entry. */
2886 if (glink_vma == 0)
2887 {
2888 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2889 glink_vma = bfd_get_32 (abfd, buf);
2890 }
2891
2892 if (glink_vma == 0)
2893 return 0;
2894
2895 /* The .glink section usually does not survive the final
2896 link; search for the section (usually .text) where the
2897 glink stubs now reside. */
2898 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2899 if (glink == NULL)
2900 return 0;
2901
2902 /* Determine glink PLT resolver by reading the relative branch
2903 from the first glink stub. */
2904 if (bfd_get_section_contents (abfd, glink, buf,
2905 glink_vma - glink->vma, 4))
2906 {
2907 unsigned int insn = bfd_get_32 (abfd, buf);
2908
2909 /* The first glink stub may either branch to the resolver ... */
2910 insn ^= B;
2911 if ((insn & ~0x3fffffc) == 0)
2912 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2913
2914 /* ... or fall through a bunch of NOPs. */
2915 else if ((insn ^ B ^ NOP) == 0)
2916 for (i = 4;
2917 bfd_get_section_contents (abfd, glink, buf,
2918 glink_vma - glink->vma + i, 4);
2919 i += 4)
2920 if (bfd_get_32 (abfd, buf) != NOP)
2921 {
2922 resolv_vma = glink_vma + i;
2923 break;
2924 }
2925 }
2926
2927 count = relplt->size / sizeof (Elf32_External_Rela);
2928 stub_vma = glink_vma - (bfd_vma) count * 16;
2929 /* If the stubs are those for -shared/-pie then we might have
2930 multiple stubs for each plt entry. If that is the case then
2931 there is no way to associate stubs with their plt entries short
2932 of figuring out the GOT pointer value used in the stub. */
2933 if (!is_nonpic_glink_stub (abfd, glink,
2934 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2935 return 0;
2936
2937 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2938 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2939 return -1;
2940
2941 size = count * sizeof (asymbol);
2942 p = relplt->relocation;
2943 for (i = 0; i < count; i++, p++)
2944 {
2945 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2946 if (p->addend != 0)
2947 size += sizeof ("+0x") - 1 + 8;
2948 }
2949
2950 size += sizeof (asymbol) + sizeof ("__glink");
2951
2952 if (resolv_vma)
2953 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2954
2955 s = *ret = bfd_malloc (size);
2956 if (s == NULL)
2957 return -1;
2958
2959 names = (char *) (s + count + 1 + (resolv_vma != 0));
2960 p = relplt->relocation;
2961 for (i = 0; i < count; i++, p++)
2962 {
2963 size_t len;
2964
2965 *s = **p->sym_ptr_ptr;
2966 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2967 we are defining a symbol, ensure one of them is set. */
2968 if ((s->flags & BSF_LOCAL) == 0)
2969 s->flags |= BSF_GLOBAL;
2970 s->flags |= BSF_SYNTHETIC;
2971 s->section = glink;
2972 s->value = stub_vma - glink->vma;
2973 s->name = names;
2974 s->udata.p = NULL;
2975 len = strlen ((*p->sym_ptr_ptr)->name);
2976 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2977 names += len;
2978 if (p->addend != 0)
2979 {
2980 memcpy (names, "+0x", sizeof ("+0x") - 1);
2981 names += sizeof ("+0x") - 1;
2982 bfd_sprintf_vma (abfd, names, p->addend);
2983 names += strlen (names);
2984 }
2985 memcpy (names, "@plt", sizeof ("@plt"));
2986 names += sizeof ("@plt");
2987 ++s;
2988 stub_vma += 16;
2989 }
2990
2991 /* Add a symbol at the start of the glink branch table. */
2992 memset (s, 0, sizeof *s);
2993 s->the_bfd = abfd;
2994 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2995 s->section = glink;
2996 s->value = glink_vma - glink->vma;
2997 s->name = names;
2998 memcpy (names, "__glink", sizeof ("__glink"));
2999 names += sizeof ("__glink");
3000 s++;
3001 count++;
3002
3003 if (resolv_vma)
3004 {
3005 /* Add a symbol for the glink PLT resolver. */
3006 memset (s, 0, sizeof *s);
3007 s->the_bfd = abfd;
3008 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3009 s->section = glink;
3010 s->value = resolv_vma - glink->vma;
3011 s->name = names;
3012 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3013 names += sizeof ("__glink_PLTresolve");
3014 s++;
3015 count++;
3016 }
3017
3018 return count;
3019 }
3020 \f
3021 /* The following functions are specific to the ELF linker, while
3022 functions above are used generally. They appear in this file more
3023 or less in the order in which they are called. eg.
3024 ppc_elf_check_relocs is called early in the link process,
3025 ppc_elf_finish_dynamic_sections is one of the last functions
3026 called. */
3027
3028 /* Track PLT entries needed for a given symbol. We might need more
3029 than one glink entry per symbol when generating a pic binary. */
3030 struct plt_entry
3031 {
3032 struct plt_entry *next;
3033
3034 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3035 This field stores the offset into .got2 used to initialise the
3036 GOT pointer reg. It will always be at least 32768. (Current
3037 gcc always uses an offset of 32768, but ld -r will pack .got2
3038 sections together resulting in larger offsets). */
3039 bfd_vma addend;
3040
3041 /* The .got2 section. */
3042 asection *sec;
3043
3044 /* PLT refcount or offset. */
3045 union
3046 {
3047 bfd_signed_vma refcount;
3048 bfd_vma offset;
3049 } plt;
3050
3051 /* .glink stub offset. */
3052 bfd_vma glink_offset;
3053 };
3054
3055 /* Of those relocs that might be copied as dynamic relocs, this function
3056 selects those that must be copied when linking a shared library,
3057 even when the symbol is local. */
3058
3059 static int
3060 must_be_dyn_reloc (struct bfd_link_info *info,
3061 enum elf_ppc_reloc_type r_type)
3062 {
3063 switch (r_type)
3064 {
3065 default:
3066 return 1;
3067
3068 case R_PPC_REL24:
3069 case R_PPC_REL14:
3070 case R_PPC_REL14_BRTAKEN:
3071 case R_PPC_REL14_BRNTAKEN:
3072 case R_PPC_REL32:
3073 return 0;
3074
3075 case R_PPC_TPREL32:
3076 case R_PPC_TPREL16:
3077 case R_PPC_TPREL16_LO:
3078 case R_PPC_TPREL16_HI:
3079 case R_PPC_TPREL16_HA:
3080 return !info->executable;
3081 }
3082 }
3083
3084 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3085 copying dynamic variables from a shared lib into an app's dynbss
3086 section, and instead use a dynamic relocation to point into the
3087 shared lib. */
3088 #define ELIMINATE_COPY_RELOCS 1
3089
3090 /* Used to track dynamic relocations for local symbols. */
3091 struct ppc_dyn_relocs
3092 {
3093 struct ppc_dyn_relocs *next;
3094
3095 /* The input section of the reloc. */
3096 asection *sec;
3097
3098 /* Total number of relocs copied for the input section. */
3099 unsigned int count : 31;
3100
3101 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3102 unsigned int ifunc : 1;
3103 };
3104
3105 /* PPC ELF linker hash entry. */
3106
3107 struct ppc_elf_link_hash_entry
3108 {
3109 struct elf_link_hash_entry elf;
3110
3111 /* If this symbol is used in the linker created sections, the processor
3112 specific backend uses this field to map the field into the offset
3113 from the beginning of the section. */
3114 elf_linker_section_pointers_t *linker_section_pointer;
3115
3116 /* Track dynamic relocs copied for this symbol. */
3117 struct elf_dyn_relocs *dyn_relocs;
3118
3119 /* Contexts in which symbol is used in the GOT (or TOC).
3120 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3121 corresponding relocs are encountered during check_relocs.
3122 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3123 indicate the corresponding GOT entry type is not needed. */
3124 #define TLS_GD 1 /* GD reloc. */
3125 #define TLS_LD 2 /* LD reloc. */
3126 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3127 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3128 #define TLS_TLS 16 /* Any TLS reloc. */
3129 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3130 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3131 char tls_mask;
3132
3133 /* Nonzero if we have seen a small data relocation referring to this
3134 symbol. */
3135 unsigned char has_sda_refs;
3136 };
3137
3138 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3139
3140 /* PPC ELF linker hash table. */
3141
3142 struct ppc_elf_link_hash_table
3143 {
3144 struct elf_link_hash_table elf;
3145
3146 /* Various options passed from the linker. */
3147 struct ppc_elf_params *params;
3148
3149 /* Short-cuts to get to dynamic linker sections. */
3150 asection *got;
3151 asection *relgot;
3152 asection *glink;
3153 asection *plt;
3154 asection *relplt;
3155 asection *iplt;
3156 asection *reliplt;
3157 asection *dynbss;
3158 asection *relbss;
3159 asection *dynsbss;
3160 asection *relsbss;
3161 elf_linker_section_t sdata[2];
3162 asection *sbss;
3163 asection *glink_eh_frame;
3164
3165 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3166 asection *srelplt2;
3167
3168 /* The .got.plt section (VxWorks only)*/
3169 asection *sgotplt;
3170
3171 /* Shortcut to __tls_get_addr. */
3172 struct elf_link_hash_entry *tls_get_addr;
3173
3174 /* The bfd that forced an old-style PLT. */
3175 bfd *old_bfd;
3176
3177 /* TLS local dynamic got entry handling. */
3178 union {
3179 bfd_signed_vma refcount;
3180 bfd_vma offset;
3181 } tlsld_got;
3182
3183 /* Offset of branch table to PltResolve function in glink. */
3184 bfd_vma glink_pltresolve;
3185
3186 /* Size of reserved GOT entries. */
3187 unsigned int got_header_size;
3188 /* Non-zero if allocating the header left a gap. */
3189 unsigned int got_gap;
3190
3191 /* The type of PLT we have chosen to use. */
3192 enum ppc_elf_plt_type plt_type;
3193
3194 /* True if the target system is VxWorks. */
3195 unsigned int is_vxworks:1;
3196
3197 /* The size of PLT entries. */
3198 int plt_entry_size;
3199 /* The distance between adjacent PLT slots. */
3200 int plt_slot_size;
3201 /* The size of the first PLT entry. */
3202 int plt_initial_entry_size;
3203
3204 /* Small local sym cache. */
3205 struct sym_cache sym_cache;
3206 };
3207
3208 /* Rename some of the generic section flags to better document how they
3209 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3210
3211 /* Nonzero if this section has TLS related relocations. */
3212 #define has_tls_reloc sec_flg0
3213
3214 /* Nonzero if this section has a call to __tls_get_addr. */
3215 #define has_tls_get_addr_call sec_flg1
3216
3217 /* Get the PPC ELF linker hash table from a link_info structure. */
3218
3219 #define ppc_elf_hash_table(p) \
3220 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3221 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3222
3223 /* Create an entry in a PPC ELF linker hash table. */
3224
3225 static struct bfd_hash_entry *
3226 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3227 struct bfd_hash_table *table,
3228 const char *string)
3229 {
3230 /* Allocate the structure if it has not already been allocated by a
3231 subclass. */
3232 if (entry == NULL)
3233 {
3234 entry = bfd_hash_allocate (table,
3235 sizeof (struct ppc_elf_link_hash_entry));
3236 if (entry == NULL)
3237 return entry;
3238 }
3239
3240 /* Call the allocation method of the superclass. */
3241 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3242 if (entry != NULL)
3243 {
3244 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3245 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3246 ppc_elf_hash_entry (entry)->tls_mask = 0;
3247 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3248 }
3249
3250 return entry;
3251 }
3252
3253 /* Create a PPC ELF linker hash table. */
3254
3255 static struct bfd_link_hash_table *
3256 ppc_elf_link_hash_table_create (bfd *abfd)
3257 {
3258 struct ppc_elf_link_hash_table *ret;
3259 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3260
3261 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3262 if (ret == NULL)
3263 return NULL;
3264
3265 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3266 ppc_elf_link_hash_newfunc,
3267 sizeof (struct ppc_elf_link_hash_entry),
3268 PPC32_ELF_DATA))
3269 {
3270 free (ret);
3271 return NULL;
3272 }
3273
3274 ret->elf.init_plt_refcount.refcount = 0;
3275 ret->elf.init_plt_refcount.glist = NULL;
3276 ret->elf.init_plt_offset.offset = 0;
3277 ret->elf.init_plt_offset.glist = NULL;
3278
3279 ret->params = &default_params;
3280
3281 ret->sdata[0].name = ".sdata";
3282 ret->sdata[0].sym_name = "_SDA_BASE_";
3283 ret->sdata[0].bss_name = ".sbss";
3284
3285 ret->sdata[1].name = ".sdata2";
3286 ret->sdata[1].sym_name = "_SDA2_BASE_";
3287 ret->sdata[1].bss_name = ".sbss2";
3288
3289 ret->plt_entry_size = 12;
3290 ret->plt_slot_size = 8;
3291 ret->plt_initial_entry_size = 72;
3292
3293 return &ret->elf.root;
3294 }
3295
3296 /* Hook linker params into hash table. */
3297
3298 void
3299 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3300 {
3301 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3302
3303 if (htab)
3304 htab->params = params;
3305 }
3306
3307 /* Create .got and the related sections. */
3308
3309 static bfd_boolean
3310 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3311 {
3312 struct ppc_elf_link_hash_table *htab;
3313 asection *s;
3314 flagword flags;
3315
3316 if (!_bfd_elf_create_got_section (abfd, info))
3317 return FALSE;
3318
3319 htab = ppc_elf_hash_table (info);
3320 htab->got = s = bfd_get_linker_section (abfd, ".got");
3321 if (s == NULL)
3322 abort ();
3323
3324 if (htab->is_vxworks)
3325 {
3326 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3327 if (!htab->sgotplt)
3328 abort ();
3329 }
3330 else
3331 {
3332 /* The powerpc .got has a blrl instruction in it. Mark it
3333 executable. */
3334 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3335 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3336 if (!bfd_set_section_flags (abfd, s, flags))
3337 return FALSE;
3338 }
3339
3340 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3341 if (!htab->relgot)
3342 abort ();
3343
3344 return TRUE;
3345 }
3346
3347 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3348 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3349 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3350
3351 static bfd_boolean
3352 ppc_elf_create_linker_section (bfd *abfd,
3353 struct bfd_link_info *info,
3354 flagword flags,
3355 elf_linker_section_t *lsect)
3356 {
3357 asection *s;
3358
3359 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3360 | SEC_LINKER_CREATED);
3361
3362 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3363 if (s == NULL)
3364 return FALSE;
3365 lsect->section = s;
3366
3367 /* Define the sym on the first section of this name. */
3368 s = bfd_get_section_by_name (abfd, lsect->name);
3369
3370 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3371 if (lsect->sym == NULL)
3372 return FALSE;
3373 lsect->sym->root.u.def.value = 0x8000;
3374 return TRUE;
3375 }
3376
3377 static bfd_boolean
3378 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3379 {
3380 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3381 asection *s;
3382 flagword flags;
3383
3384 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3385 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3386 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3387 htab->glink = s;
3388 if (s == NULL
3389 || !bfd_set_section_alignment (abfd, s,
3390 htab->params->ppc476_workaround ? 6 : 4))
3391 return FALSE;
3392
3393 if (!info->no_ld_generated_unwind_info)
3394 {
3395 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3396 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3397 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3398 htab->glink_eh_frame = s;
3399 if (s == NULL
3400 || !bfd_set_section_alignment (abfd, s, 2))
3401 return FALSE;
3402 }
3403
3404 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3405 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3406 htab->iplt = s;
3407 if (s == NULL
3408 || !bfd_set_section_alignment (abfd, s, 4))
3409 return FALSE;
3410
3411 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3412 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3413 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3414 htab->reliplt = s;
3415 if (s == NULL
3416 || ! bfd_set_section_alignment (abfd, s, 2))
3417 return FALSE;
3418
3419 if (!ppc_elf_create_linker_section (abfd, info, 0,
3420 &htab->sdata[0]))
3421 return FALSE;
3422
3423 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3424 &htab->sdata[1]))
3425 return FALSE;
3426
3427 return TRUE;
3428 }
3429
3430 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3431 to output sections (just like _bfd_elf_create_dynamic_sections has
3432 to create .dynbss and .rela.bss). */
3433
3434 static bfd_boolean
3435 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3436 {
3437 struct ppc_elf_link_hash_table *htab;
3438 asection *s;
3439 flagword flags;
3440
3441 htab = ppc_elf_hash_table (info);
3442
3443 if (htab->got == NULL
3444 && !ppc_elf_create_got (abfd, info))
3445 return FALSE;
3446
3447 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3448 return FALSE;
3449
3450 if (htab->glink == NULL
3451 && !ppc_elf_create_glink (abfd, info))
3452 return FALSE;
3453
3454 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3455 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3456 SEC_ALLOC | SEC_LINKER_CREATED);
3457 htab->dynsbss = s;
3458 if (s == NULL)
3459 return FALSE;
3460
3461 if (! info->shared)
3462 {
3463 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3464 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3465 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3466 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3467 htab->relsbss = s;
3468 if (s == NULL
3469 || ! bfd_set_section_alignment (abfd, s, 2))
3470 return FALSE;
3471 }
3472
3473 if (htab->is_vxworks
3474 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3475 return FALSE;
3476
3477 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3478 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3479 if (s == NULL)
3480 abort ();
3481
3482 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3483 if (htab->plt_type == PLT_VXWORKS)
3484 /* The VxWorks PLT is a loaded section with contents. */
3485 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3486 return bfd_set_section_flags (abfd, s, flags);
3487 }
3488
3489 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3490
3491 static void
3492 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3493 struct elf_link_hash_entry *dir,
3494 struct elf_link_hash_entry *ind)
3495 {
3496 struct ppc_elf_link_hash_entry *edir, *eind;
3497
3498 edir = (struct ppc_elf_link_hash_entry *) dir;
3499 eind = (struct ppc_elf_link_hash_entry *) ind;
3500
3501 edir->tls_mask |= eind->tls_mask;
3502 edir->has_sda_refs |= eind->has_sda_refs;
3503
3504 /* If called to transfer flags for a weakdef during processing
3505 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3506 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3507 if (!(ELIMINATE_COPY_RELOCS
3508 && eind->elf.root.type != bfd_link_hash_indirect
3509 && edir->elf.dynamic_adjusted))
3510 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3511
3512 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3513 edir->elf.ref_regular |= eind->elf.ref_regular;
3514 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3515 edir->elf.needs_plt |= eind->elf.needs_plt;
3516 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3517
3518 if (eind->dyn_relocs != NULL)
3519 {
3520 if (edir->dyn_relocs != NULL)
3521 {
3522 struct elf_dyn_relocs **pp;
3523 struct elf_dyn_relocs *p;
3524
3525 /* Add reloc counts against the indirect sym to the direct sym
3526 list. Merge any entries against the same section. */
3527 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3528 {
3529 struct elf_dyn_relocs *q;
3530
3531 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3532 if (q->sec == p->sec)
3533 {
3534 q->pc_count += p->pc_count;
3535 q->count += p->count;
3536 *pp = p->next;
3537 break;
3538 }
3539 if (q == NULL)
3540 pp = &p->next;
3541 }
3542 *pp = edir->dyn_relocs;
3543 }
3544
3545 edir->dyn_relocs = eind->dyn_relocs;
3546 eind->dyn_relocs = NULL;
3547 }
3548
3549 /* If we were called to copy over info for a weak sym, that's all.
3550 You might think dyn_relocs need not be copied over; After all,
3551 both syms will be dynamic or both non-dynamic so we're just
3552 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3553 code in ppc_elf_adjust_dynamic_symbol needs to check for
3554 dyn_relocs in read-only sections, and it does so on what is the
3555 DIR sym here. */
3556 if (eind->elf.root.type != bfd_link_hash_indirect)
3557 return;
3558
3559 /* Copy over the GOT refcount entries that we may have already seen to
3560 the symbol which just became indirect. */
3561 edir->elf.got.refcount += eind->elf.got.refcount;
3562 eind->elf.got.refcount = 0;
3563
3564 /* And plt entries. */
3565 if (eind->elf.plt.plist != NULL)
3566 {
3567 if (edir->elf.plt.plist != NULL)
3568 {
3569 struct plt_entry **entp;
3570 struct plt_entry *ent;
3571
3572 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3573 {
3574 struct plt_entry *dent;
3575
3576 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3577 if (dent->sec == ent->sec && dent->addend == ent->addend)
3578 {
3579 dent->plt.refcount += ent->plt.refcount;
3580 *entp = ent->next;
3581 break;
3582 }
3583 if (dent == NULL)
3584 entp = &ent->next;
3585 }
3586 *entp = edir->elf.plt.plist;
3587 }
3588
3589 edir->elf.plt.plist = eind->elf.plt.plist;
3590 eind->elf.plt.plist = NULL;
3591 }
3592
3593 if (eind->elf.dynindx != -1)
3594 {
3595 if (edir->elf.dynindx != -1)
3596 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3597 edir->elf.dynstr_index);
3598 edir->elf.dynindx = eind->elf.dynindx;
3599 edir->elf.dynstr_index = eind->elf.dynstr_index;
3600 eind->elf.dynindx = -1;
3601 eind->elf.dynstr_index = 0;
3602 }
3603 }
3604
3605 /* Hook called by the linker routine which adds symbols from an object
3606 file. We use it to put .comm items in .sbss, and not .bss. */
3607
3608 static bfd_boolean
3609 ppc_elf_add_symbol_hook (bfd *abfd,
3610 struct bfd_link_info *info,
3611 Elf_Internal_Sym *sym,
3612 const char **namep ATTRIBUTE_UNUSED,
3613 flagword *flagsp ATTRIBUTE_UNUSED,
3614 asection **secp,
3615 bfd_vma *valp)
3616 {
3617 if (sym->st_shndx == SHN_COMMON
3618 && !info->relocatable
3619 && is_ppc_elf (info->output_bfd)
3620 && sym->st_size <= elf_gp_size (abfd))
3621 {
3622 /* Common symbols less than or equal to -G nn bytes are automatically
3623 put into .sbss. */
3624 struct ppc_elf_link_hash_table *htab;
3625
3626 htab = ppc_elf_hash_table (info);
3627 if (htab->sbss == NULL)
3628 {
3629 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3630
3631 if (!htab->elf.dynobj)
3632 htab->elf.dynobj = abfd;
3633
3634 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3635 ".sbss",
3636 flags);
3637 if (htab->sbss == NULL)
3638 return FALSE;
3639 }
3640
3641 *secp = htab->sbss;
3642 *valp = sym->st_size;
3643 }
3644
3645 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3646 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
3647 && (abfd->flags & DYNAMIC) == 0
3648 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3649 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3650
3651 return TRUE;
3652 }
3653 \f
3654 /* Find a linker generated pointer with a given addend and type. */
3655
3656 static elf_linker_section_pointers_t *
3657 elf_find_pointer_linker_section
3658 (elf_linker_section_pointers_t *linker_pointers,
3659 bfd_vma addend,
3660 elf_linker_section_t *lsect)
3661 {
3662 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3663 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3664 return linker_pointers;
3665
3666 return NULL;
3667 }
3668
3669 /* Allocate a pointer to live in a linker created section. */
3670
3671 static bfd_boolean
3672 elf_allocate_pointer_linker_section (bfd *abfd,
3673 elf_linker_section_t *lsect,
3674 struct elf_link_hash_entry *h,
3675 const Elf_Internal_Rela *rel)
3676 {
3677 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3678 elf_linker_section_pointers_t *linker_section_ptr;
3679 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3680 bfd_size_type amt;
3681
3682 BFD_ASSERT (lsect != NULL);
3683
3684 /* Is this a global symbol? */
3685 if (h != NULL)
3686 {
3687 struct ppc_elf_link_hash_entry *eh;
3688
3689 /* Has this symbol already been allocated? If so, our work is done. */
3690 eh = (struct ppc_elf_link_hash_entry *) h;
3691 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3692 rel->r_addend,
3693 lsect))
3694 return TRUE;
3695
3696 ptr_linker_section_ptr = &eh->linker_section_pointer;
3697 }
3698 else
3699 {
3700 BFD_ASSERT (is_ppc_elf (abfd));
3701
3702 /* Allocation of a pointer to a local symbol. */
3703 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3704
3705 /* Allocate a table to hold the local symbols if first time. */
3706 if (!ptr)
3707 {
3708 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3709
3710 amt = num_symbols;
3711 amt *= sizeof (elf_linker_section_pointers_t *);
3712 ptr = bfd_zalloc (abfd, amt);
3713
3714 if (!ptr)
3715 return FALSE;
3716
3717 elf_local_ptr_offsets (abfd) = ptr;
3718 }
3719
3720 /* Has this symbol already been allocated? If so, our work is done. */
3721 if (elf_find_pointer_linker_section (ptr[r_symndx],
3722 rel->r_addend,
3723 lsect))
3724 return TRUE;
3725
3726 ptr_linker_section_ptr = &ptr[r_symndx];
3727 }
3728
3729 /* Allocate space for a pointer in the linker section, and allocate
3730 a new pointer record from internal memory. */
3731 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3732 amt = sizeof (elf_linker_section_pointers_t);
3733 linker_section_ptr = bfd_alloc (abfd, amt);
3734
3735 if (!linker_section_ptr)
3736 return FALSE;
3737
3738 linker_section_ptr->next = *ptr_linker_section_ptr;
3739 linker_section_ptr->addend = rel->r_addend;
3740 linker_section_ptr->lsect = lsect;
3741 *ptr_linker_section_ptr = linker_section_ptr;
3742
3743 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3744 return FALSE;
3745 linker_section_ptr->offset = lsect->section->size;
3746 lsect->section->size += 4;
3747
3748 #ifdef DEBUG
3749 fprintf (stderr,
3750 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3751 lsect->name, (long) linker_section_ptr->offset,
3752 (long) lsect->section->size);
3753 #endif
3754
3755 return TRUE;
3756 }
3757
3758 static struct plt_entry **
3759 update_local_sym_info (bfd *abfd,
3760 Elf_Internal_Shdr *symtab_hdr,
3761 unsigned long r_symndx,
3762 int tls_type)
3763 {
3764 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3765 struct plt_entry **local_plt;
3766 char *local_got_tls_masks;
3767
3768 if (local_got_refcounts == NULL)
3769 {
3770 bfd_size_type size = symtab_hdr->sh_info;
3771
3772 size *= (sizeof (*local_got_refcounts)
3773 + sizeof (*local_plt)
3774 + sizeof (*local_got_tls_masks));
3775 local_got_refcounts = bfd_zalloc (abfd, size);
3776 if (local_got_refcounts == NULL)
3777 return NULL;
3778 elf_local_got_refcounts (abfd) = local_got_refcounts;
3779 }
3780
3781 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3782 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3783 local_got_tls_masks[r_symndx] |= tls_type;
3784 if (tls_type != PLT_IFUNC)
3785 local_got_refcounts[r_symndx] += 1;
3786 return local_plt + r_symndx;
3787 }
3788
3789 static bfd_boolean
3790 update_plt_info (bfd *abfd, struct plt_entry **plist,
3791 asection *sec, bfd_vma addend)
3792 {
3793 struct plt_entry *ent;
3794
3795 if (addend < 32768)
3796 sec = NULL;
3797 for (ent = *plist; ent != NULL; ent = ent->next)
3798 if (ent->sec == sec && ent->addend == addend)
3799 break;
3800 if (ent == NULL)
3801 {
3802 bfd_size_type amt = sizeof (*ent);
3803 ent = bfd_alloc (abfd, amt);
3804 if (ent == NULL)
3805 return FALSE;
3806 ent->next = *plist;
3807 ent->sec = sec;
3808 ent->addend = addend;
3809 ent->plt.refcount = 0;
3810 *plist = ent;
3811 }
3812 ent->plt.refcount += 1;
3813 return TRUE;
3814 }
3815
3816 static struct plt_entry *
3817 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3818 {
3819 struct plt_entry *ent;
3820
3821 if (addend < 32768)
3822 sec = NULL;
3823 for (ent = *plist; ent != NULL; ent = ent->next)
3824 if (ent->sec == sec && ent->addend == addend)
3825 break;
3826 return ent;
3827 }
3828
3829 static bfd_boolean
3830 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3831 {
3832 return (r_type == R_PPC_PLTREL24
3833 || r_type == R_PPC_LOCAL24PC
3834 || r_type == R_PPC_REL24
3835 || r_type == R_PPC_REL14
3836 || r_type == R_PPC_REL14_BRTAKEN
3837 || r_type == R_PPC_REL14_BRNTAKEN
3838 || r_type == R_PPC_ADDR24
3839 || r_type == R_PPC_ADDR14
3840 || r_type == R_PPC_ADDR14_BRTAKEN
3841 || r_type == R_PPC_ADDR14_BRNTAKEN);
3842 }
3843
3844 static void
3845 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3846 {
3847 (*_bfd_error_handler)
3848 (_("%B: relocation %s cannot be used when making a shared object"),
3849 abfd,
3850 ppc_elf_howto_table[r_type]->name);
3851 bfd_set_error (bfd_error_bad_value);
3852 }
3853
3854 /* Look through the relocs for a section during the first phase, and
3855 allocate space in the global offset table or procedure linkage
3856 table. */
3857
3858 static bfd_boolean
3859 ppc_elf_check_relocs (bfd *abfd,
3860 struct bfd_link_info *info,
3861 asection *sec,
3862 const Elf_Internal_Rela *relocs)
3863 {
3864 struct ppc_elf_link_hash_table *htab;
3865 Elf_Internal_Shdr *symtab_hdr;
3866 struct elf_link_hash_entry **sym_hashes;
3867 const Elf_Internal_Rela *rel;
3868 const Elf_Internal_Rela *rel_end;
3869 asection *got2, *sreloc;
3870 struct elf_link_hash_entry *tga;
3871
3872 if (info->relocatable)
3873 return TRUE;
3874
3875 /* Don't do anything special with non-loaded, non-alloced sections.
3876 In particular, any relocs in such sections should not affect GOT
3877 and PLT reference counting (ie. we don't allow them to create GOT
3878 or PLT entries), there's no possibility or desire to optimize TLS
3879 relocs, and there's not much point in propagating relocs to shared
3880 libs that the dynamic linker won't relocate. */
3881 if ((sec->flags & SEC_ALLOC) == 0)
3882 return TRUE;
3883
3884 #ifdef DEBUG
3885 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3886 sec, abfd);
3887 #endif
3888
3889 BFD_ASSERT (is_ppc_elf (abfd));
3890
3891 /* Initialize howto table if not already done. */
3892 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3893 ppc_elf_howto_init ();
3894
3895 htab = ppc_elf_hash_table (info);
3896 if (htab->glink == NULL)
3897 {
3898 if (htab->elf.dynobj == NULL)
3899 htab->elf.dynobj = abfd;
3900 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3901 return FALSE;
3902 }
3903 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3904 FALSE, FALSE, TRUE);
3905 symtab_hdr = &elf_symtab_hdr (abfd);
3906 sym_hashes = elf_sym_hashes (abfd);
3907 got2 = bfd_get_section_by_name (abfd, ".got2");
3908 sreloc = NULL;
3909
3910 rel_end = relocs + sec->reloc_count;
3911 for (rel = relocs; rel < rel_end; rel++)
3912 {
3913 unsigned long r_symndx;
3914 enum elf_ppc_reloc_type r_type;
3915 struct elf_link_hash_entry *h;
3916 int tls_type;
3917
3918 r_symndx = ELF32_R_SYM (rel->r_info);
3919 if (r_symndx < symtab_hdr->sh_info)
3920 h = NULL;
3921 else
3922 {
3923 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3924 while (h->root.type == bfd_link_hash_indirect
3925 || h->root.type == bfd_link_hash_warning)
3926 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3927
3928 /* PR15323, ref flags aren't set for references in the same
3929 object. */
3930 h->root.non_ir_ref = 1;
3931 }
3932
3933 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3934 This shows up in particular in an R_PPC_ADDR32 in the eabi
3935 startup code. */
3936 if (h != NULL
3937 && htab->got == NULL
3938 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3939 {
3940 if (htab->elf.dynobj == NULL)
3941 htab->elf.dynobj = abfd;
3942 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3943 return FALSE;
3944 BFD_ASSERT (h == htab->elf.hgot);
3945 }
3946
3947 tls_type = 0;
3948 r_type = ELF32_R_TYPE (rel->r_info);
3949 if (h == NULL && !htab->is_vxworks)
3950 {
3951 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3952 abfd, r_symndx);
3953 if (isym == NULL)
3954 return FALSE;
3955
3956 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3957 {
3958 struct plt_entry **ifunc;
3959
3960 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3961 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3962 PLT_IFUNC);
3963 if (ifunc == NULL)
3964 return FALSE;
3965
3966 /* STT_GNU_IFUNC symbols must have a PLT entry;
3967 In a non-pie executable even when there are
3968 no plt calls. */
3969 if (!info->shared
3970 || is_branch_reloc (r_type))
3971 {
3972 bfd_vma addend = 0;
3973 if (r_type == R_PPC_PLTREL24)
3974 {
3975 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3976 if (info->shared)
3977 addend = rel->r_addend;
3978 }
3979 if (!update_plt_info (abfd, ifunc, got2, addend))
3980 return FALSE;
3981 }
3982 }
3983 }
3984
3985 if (!htab->is_vxworks
3986 && is_branch_reloc (r_type)
3987 && h != NULL
3988 && h == tga)
3989 {
3990 if (rel != relocs
3991 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3992 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3993 /* We have a new-style __tls_get_addr call with a marker
3994 reloc. */
3995 ;
3996 else
3997 /* Mark this section as having an old-style call. */
3998 sec->has_tls_get_addr_call = 1;
3999 }
4000
4001 switch (r_type)
4002 {
4003 case R_PPC_TLSGD:
4004 case R_PPC_TLSLD:
4005 /* These special tls relocs tie a call to __tls_get_addr with
4006 its parameter symbol. */
4007 break;
4008
4009 case R_PPC_GOT_TLSLD16:
4010 case R_PPC_GOT_TLSLD16_LO:
4011 case R_PPC_GOT_TLSLD16_HI:
4012 case R_PPC_GOT_TLSLD16_HA:
4013 tls_type = TLS_TLS | TLS_LD;
4014 goto dogottls;
4015
4016 case R_PPC_GOT_TLSGD16:
4017 case R_PPC_GOT_TLSGD16_LO:
4018 case R_PPC_GOT_TLSGD16_HI:
4019 case R_PPC_GOT_TLSGD16_HA:
4020 tls_type = TLS_TLS | TLS_GD;
4021 goto dogottls;
4022
4023 case R_PPC_GOT_TPREL16:
4024 case R_PPC_GOT_TPREL16_LO:
4025 case R_PPC_GOT_TPREL16_HI:
4026 case R_PPC_GOT_TPREL16_HA:
4027 if (info->shared)
4028 info->flags |= DF_STATIC_TLS;
4029 tls_type = TLS_TLS | TLS_TPREL;
4030 goto dogottls;
4031
4032 case R_PPC_GOT_DTPREL16:
4033 case R_PPC_GOT_DTPREL16_LO:
4034 case R_PPC_GOT_DTPREL16_HI:
4035 case R_PPC_GOT_DTPREL16_HA:
4036 tls_type = TLS_TLS | TLS_DTPREL;
4037 dogottls:
4038 sec->has_tls_reloc = 1;
4039 /* Fall thru */
4040
4041 /* GOT16 relocations */
4042 case R_PPC_GOT16:
4043 case R_PPC_GOT16_LO:
4044 case R_PPC_GOT16_HI:
4045 case R_PPC_GOT16_HA:
4046 /* This symbol requires a global offset table entry. */
4047 if (htab->got == NULL)
4048 {
4049 if (htab->elf.dynobj == NULL)
4050 htab->elf.dynobj = abfd;
4051 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4052 return FALSE;
4053 }
4054 if (h != NULL)
4055 {
4056 h->got.refcount += 1;
4057 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4058 }
4059 else
4060 /* This is a global offset table entry for a local symbol. */
4061 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4062 return FALSE;
4063
4064 /* We may also need a plt entry if the symbol turns out to be
4065 an ifunc. */
4066 if (h != NULL && !info->shared)
4067 {
4068 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4069 return FALSE;
4070 }
4071 break;
4072
4073 /* Indirect .sdata relocation. */
4074 case R_PPC_EMB_SDAI16:
4075 if (info->shared)
4076 {
4077 bad_shared_reloc (abfd, r_type);
4078 return FALSE;
4079 }
4080 htab->sdata[0].sym->ref_regular = 1;
4081 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4082 h, rel))
4083 return FALSE;
4084 if (h != NULL)
4085 {
4086 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4087 h->non_got_ref = TRUE;
4088 }
4089 break;
4090
4091 /* Indirect .sdata2 relocation. */
4092 case R_PPC_EMB_SDA2I16:
4093 if (info->shared)
4094 {
4095 bad_shared_reloc (abfd, r_type);
4096 return FALSE;
4097 }
4098 htab->sdata[1].sym->ref_regular = 1;
4099 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4100 h, rel))
4101 return FALSE;
4102 if (h != NULL)
4103 {
4104 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4105 h->non_got_ref = TRUE;
4106 }
4107 break;
4108
4109 case R_PPC_SDAREL16:
4110 htab->sdata[0].sym->ref_regular = 1;
4111 /* Fall thru */
4112
4113 case R_PPC_VLE_SDAREL_LO16A:
4114 case R_PPC_VLE_SDAREL_LO16D:
4115 case R_PPC_VLE_SDAREL_HI16A:
4116 case R_PPC_VLE_SDAREL_HI16D:
4117 case R_PPC_VLE_SDAREL_HA16A:
4118 case R_PPC_VLE_SDAREL_HA16D:
4119 if (h != NULL)
4120 {
4121 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4122 h->non_got_ref = TRUE;
4123 }
4124 break;
4125
4126 case R_PPC_VLE_REL8:
4127 case R_PPC_VLE_REL15:
4128 case R_PPC_VLE_REL24:
4129 case R_PPC_VLE_LO16A:
4130 case R_PPC_VLE_LO16D:
4131 case R_PPC_VLE_HI16A:
4132 case R_PPC_VLE_HI16D:
4133 case R_PPC_VLE_HA16A:
4134 case R_PPC_VLE_HA16D:
4135 break;
4136
4137 case R_PPC_EMB_SDA2REL:
4138 if (info->shared)
4139 {
4140 bad_shared_reloc (abfd, r_type);
4141 return FALSE;
4142 }
4143 htab->sdata[1].sym->ref_regular = 1;
4144 if (h != NULL)
4145 {
4146 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4147 h->non_got_ref = TRUE;
4148 }
4149 break;
4150
4151 case R_PPC_VLE_SDA21_LO:
4152 case R_PPC_VLE_SDA21:
4153 case R_PPC_EMB_SDA21:
4154 case R_PPC_EMB_RELSDA:
4155 if (info->shared)
4156 {
4157 bad_shared_reloc (abfd, r_type);
4158 return FALSE;
4159 }
4160 if (h != NULL)
4161 {
4162 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4163 h->non_got_ref = TRUE;
4164 }
4165 break;
4166
4167 case R_PPC_EMB_NADDR32:
4168 case R_PPC_EMB_NADDR16:
4169 case R_PPC_EMB_NADDR16_LO:
4170 case R_PPC_EMB_NADDR16_HI:
4171 case R_PPC_EMB_NADDR16_HA:
4172 if (info->shared)
4173 {
4174 bad_shared_reloc (abfd, r_type);
4175 return FALSE;
4176 }
4177 if (h != NULL)
4178 h->non_got_ref = TRUE;
4179 break;
4180
4181 case R_PPC_PLTREL24:
4182 if (h == NULL)
4183 break;
4184 /* Fall through */
4185 case R_PPC_PLT32:
4186 case R_PPC_PLTREL32:
4187 case R_PPC_PLT16_LO:
4188 case R_PPC_PLT16_HI:
4189 case R_PPC_PLT16_HA:
4190 #ifdef DEBUG
4191 fprintf (stderr, "Reloc requires a PLT entry\n");
4192 #endif
4193 /* This symbol requires a procedure linkage table entry. We
4194 actually build the entry in finish_dynamic_symbol,
4195 because this might be a case of linking PIC code without
4196 linking in any dynamic objects, in which case we don't
4197 need to generate a procedure linkage table after all. */
4198
4199 if (h == NULL)
4200 {
4201 /* It does not make sense to have a procedure linkage
4202 table entry for a local symbol. */
4203 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4204 abfd, sec, rel->r_offset,
4205 ppc_elf_howto_table[r_type]->name);
4206 bfd_set_error (bfd_error_bad_value);
4207 return FALSE;
4208 }
4209 else
4210 {
4211 bfd_vma addend = 0;
4212
4213 if (r_type == R_PPC_PLTREL24)
4214 {
4215 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4216 if (info->shared)
4217 addend = rel->r_addend;
4218 }
4219 h->needs_plt = 1;
4220 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4221 return FALSE;
4222 }
4223 break;
4224
4225 /* The following relocations don't need to propagate the
4226 relocation if linking a shared object since they are
4227 section relative. */
4228 case R_PPC_SECTOFF:
4229 case R_PPC_SECTOFF_LO:
4230 case R_PPC_SECTOFF_HI:
4231 case R_PPC_SECTOFF_HA:
4232 case R_PPC_DTPREL16:
4233 case R_PPC_DTPREL16_LO:
4234 case R_PPC_DTPREL16_HI:
4235 case R_PPC_DTPREL16_HA:
4236 case R_PPC_TOC16:
4237 break;
4238
4239 case R_PPC_REL16:
4240 case R_PPC_REL16_LO:
4241 case R_PPC_REL16_HI:
4242 case R_PPC_REL16_HA:
4243 ppc_elf_tdata (abfd)->has_rel16 = 1;
4244 break;
4245
4246 /* These are just markers. */
4247 case R_PPC_TLS:
4248 case R_PPC_EMB_MRKREF:
4249 case R_PPC_NONE:
4250 case R_PPC_max:
4251 case R_PPC_RELAX:
4252 case R_PPC_RELAX_PLT:
4253 case R_PPC_RELAX_PLTREL24:
4254 break;
4255
4256 /* These should only appear in dynamic objects. */
4257 case R_PPC_COPY:
4258 case R_PPC_GLOB_DAT:
4259 case R_PPC_JMP_SLOT:
4260 case R_PPC_RELATIVE:
4261 case R_PPC_IRELATIVE:
4262 break;
4263
4264 /* These aren't handled yet. We'll report an error later. */
4265 case R_PPC_ADDR30:
4266 case R_PPC_EMB_RELSEC16:
4267 case R_PPC_EMB_RELST_LO:
4268 case R_PPC_EMB_RELST_HI:
4269 case R_PPC_EMB_RELST_HA:
4270 case R_PPC_EMB_BIT_FLD:
4271 break;
4272
4273 /* This refers only to functions defined in the shared library. */
4274 case R_PPC_LOCAL24PC:
4275 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4276 {
4277 htab->plt_type = PLT_OLD;
4278 htab->old_bfd = abfd;
4279 }
4280 if (h != NULL && h->type == STT_GNU_IFUNC)
4281 {
4282 if (info->shared)
4283 {
4284 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4285 abfd, sec, rel->r_offset,
4286 h->root.root.string);
4287 bfd_set_error (bfd_error_bad_value);
4288 return FALSE;
4289 }
4290 h->needs_plt = 1;
4291 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4292 return FALSE;
4293 }
4294 break;
4295
4296 /* This relocation describes the C++ object vtable hierarchy.
4297 Reconstruct it for later use during GC. */
4298 case R_PPC_GNU_VTINHERIT:
4299 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4300 return FALSE;
4301 break;
4302
4303 /* This relocation describes which C++ vtable entries are actually
4304 used. Record for later use during GC. */
4305 case R_PPC_GNU_VTENTRY:
4306 BFD_ASSERT (h != NULL);
4307 if (h != NULL
4308 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4309 return FALSE;
4310 break;
4311
4312 /* We shouldn't really be seeing these. */
4313 case R_PPC_TPREL32:
4314 case R_PPC_TPREL16:
4315 case R_PPC_TPREL16_LO:
4316 case R_PPC_TPREL16_HI:
4317 case R_PPC_TPREL16_HA:
4318 if (info->shared)
4319 info->flags |= DF_STATIC_TLS;
4320 goto dodyn;
4321
4322 /* Nor these. */
4323 case R_PPC_DTPMOD32:
4324 case R_PPC_DTPREL32:
4325 goto dodyn;
4326
4327 case R_PPC_REL32:
4328 if (h == NULL
4329 && got2 != NULL
4330 && (sec->flags & SEC_CODE) != 0
4331 && info->shared
4332 && htab->plt_type == PLT_UNSET)
4333 {
4334 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4335 the start of a function, which assembles to a REL32
4336 reference to .got2. If we detect one of these, then
4337 force the old PLT layout because the linker cannot
4338 reliably deduce the GOT pointer value needed for
4339 PLT call stubs. */
4340 asection *s;
4341 Elf_Internal_Sym *isym;
4342
4343 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4344 abfd, r_symndx);
4345 if (isym == NULL)
4346 return FALSE;
4347
4348 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4349 if (s == got2)
4350 {
4351 htab->plt_type = PLT_OLD;
4352 htab->old_bfd = abfd;
4353 }
4354 }
4355 if (h == NULL || h == htab->elf.hgot)
4356 break;
4357 /* fall through */
4358
4359 case R_PPC_ADDR32:
4360 case R_PPC_ADDR16:
4361 case R_PPC_ADDR16_LO:
4362 case R_PPC_ADDR16_HI:
4363 case R_PPC_ADDR16_HA:
4364 case R_PPC_UADDR32:
4365 case R_PPC_UADDR16:
4366 if (h != NULL && !info->shared)
4367 {
4368 /* We may need a plt entry if the symbol turns out to be
4369 a function defined in a dynamic object. */
4370 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4371 return FALSE;
4372
4373 /* We may need a copy reloc too. */
4374 h->non_got_ref = 1;
4375 h->pointer_equality_needed = 1;
4376 }
4377 goto dodyn;
4378
4379 case R_PPC_REL24:
4380 case R_PPC_REL14:
4381 case R_PPC_REL14_BRTAKEN:
4382 case R_PPC_REL14_BRNTAKEN:
4383 if (h == NULL)
4384 break;
4385 if (h == htab->elf.hgot)
4386 {
4387 if (htab->plt_type == PLT_UNSET)
4388 {
4389 htab->plt_type = PLT_OLD;
4390 htab->old_bfd = abfd;
4391 }
4392 break;
4393 }
4394 /* fall through */
4395
4396 case R_PPC_ADDR24:
4397 case R_PPC_ADDR14:
4398 case R_PPC_ADDR14_BRTAKEN:
4399 case R_PPC_ADDR14_BRNTAKEN:
4400 if (h != NULL && !info->shared)
4401 {
4402 /* We may need a plt entry if the symbol turns out to be
4403 a function defined in a dynamic object. */
4404 h->needs_plt = 1;
4405 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4406 return FALSE;
4407 break;
4408 }
4409
4410 dodyn:
4411 /* If we are creating a shared library, and this is a reloc
4412 against a global symbol, or a non PC relative reloc
4413 against a local symbol, then we need to copy the reloc
4414 into the shared library. However, if we are linking with
4415 -Bsymbolic, we do not need to copy a reloc against a
4416 global symbol which is defined in an object we are
4417 including in the link (i.e., DEF_REGULAR is set). At
4418 this point we have not seen all the input files, so it is
4419 possible that DEF_REGULAR is not set now but will be set
4420 later (it is never cleared). In case of a weak definition,
4421 DEF_REGULAR may be cleared later by a strong definition in
4422 a shared library. We account for that possibility below by
4423 storing information in the dyn_relocs field of the hash
4424 table entry. A similar situation occurs when creating
4425 shared libraries and symbol visibility changes render the
4426 symbol local.
4427
4428 If on the other hand, we are creating an executable, we
4429 may need to keep relocations for symbols satisfied by a
4430 dynamic library if we manage to avoid copy relocs for the
4431 symbol. */
4432 if ((info->shared
4433 && (must_be_dyn_reloc (info, r_type)
4434 || (h != NULL
4435 && (!SYMBOLIC_BIND (info, h)
4436 || h->root.type == bfd_link_hash_defweak
4437 || !h->def_regular))))
4438 || (ELIMINATE_COPY_RELOCS
4439 && !info->shared
4440 && h != NULL
4441 && (h->root.type == bfd_link_hash_defweak
4442 || !h->def_regular)))
4443 {
4444 #ifdef DEBUG
4445 fprintf (stderr,
4446 "ppc_elf_check_relocs needs to "
4447 "create relocation for %s\n",
4448 (h && h->root.root.string
4449 ? h->root.root.string : "<unknown>"));
4450 #endif
4451 if (sreloc == NULL)
4452 {
4453 if (htab->elf.dynobj == NULL)
4454 htab->elf.dynobj = abfd;
4455
4456 sreloc = _bfd_elf_make_dynamic_reloc_section
4457 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4458
4459 if (sreloc == NULL)
4460 return FALSE;
4461 }
4462
4463 /* If this is a global symbol, we count the number of
4464 relocations we need for this symbol. */
4465 if (h != NULL)
4466 {
4467 struct elf_dyn_relocs *p;
4468 struct elf_dyn_relocs **rel_head;
4469
4470 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4471 p = *rel_head;
4472 if (p == NULL || p->sec != sec)
4473 {
4474 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4475 if (p == NULL)
4476 return FALSE;
4477 p->next = *rel_head;
4478 *rel_head = p;
4479 p->sec = sec;
4480 p->count = 0;
4481 p->pc_count = 0;
4482 }
4483 p->count += 1;
4484 if (!must_be_dyn_reloc (info, r_type))
4485 p->pc_count += 1;
4486 }
4487 else
4488 {
4489 /* Track dynamic relocs needed for local syms too.
4490 We really need local syms available to do this
4491 easily. Oh well. */
4492 struct ppc_dyn_relocs *p;
4493 struct ppc_dyn_relocs **rel_head;
4494 bfd_boolean is_ifunc;
4495 asection *s;
4496 void *vpp;
4497 Elf_Internal_Sym *isym;
4498
4499 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4500 abfd, r_symndx);
4501 if (isym == NULL)
4502 return FALSE;
4503
4504 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4505 if (s == NULL)
4506 s = sec;
4507
4508 vpp = &elf_section_data (s)->local_dynrel;
4509 rel_head = (struct ppc_dyn_relocs **) vpp;
4510 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4511 p = *rel_head;
4512 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4513 p = p->next;
4514 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4515 {
4516 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4517 if (p == NULL)
4518 return FALSE;
4519 p->next = *rel_head;
4520 *rel_head = p;
4521 p->sec = sec;
4522 p->ifunc = is_ifunc;
4523 p->count = 0;
4524 }
4525 p->count += 1;
4526 }
4527 }
4528
4529 break;
4530 }
4531 }
4532
4533 return TRUE;
4534 }
4535 \f
4536
4537 /* Merge object attributes from IBFD into OBFD. Raise an error if
4538 there are conflicting attributes. */
4539 static bfd_boolean
4540 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4541 {
4542 obj_attribute *in_attr, *in_attrs;
4543 obj_attribute *out_attr, *out_attrs;
4544
4545 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4546 {
4547 /* This is the first object. Copy the attributes. */
4548 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4549
4550 /* Use the Tag_null value to indicate the attributes have been
4551 initialized. */
4552 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4553
4554 return TRUE;
4555 }
4556
4557 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4558 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4559
4560 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4561 non-conflicting ones. */
4562 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4563 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4564 if (in_attr->i != out_attr->i)
4565 {
4566 out_attr->type = 1;
4567 if (out_attr->i == 0)
4568 out_attr->i = in_attr->i;
4569 else if (in_attr->i == 0)
4570 ;
4571 else if (out_attr->i == 1 && in_attr->i == 2)
4572 _bfd_error_handler
4573 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4574 else if (out_attr->i == 1 && in_attr->i == 3)
4575 _bfd_error_handler
4576 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4577 obfd, ibfd);
4578 else if (out_attr->i == 3 && in_attr->i == 1)
4579 _bfd_error_handler
4580 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4581 ibfd, obfd);
4582 else if (out_attr->i == 3 && in_attr->i == 2)
4583 _bfd_error_handler
4584 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4585 ibfd, obfd);
4586 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4587 _bfd_error_handler
4588 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4589 else if (in_attr->i > 3)
4590 _bfd_error_handler
4591 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4592 in_attr->i);
4593 else
4594 _bfd_error_handler
4595 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4596 out_attr->i);
4597 }
4598
4599 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4600 merge non-conflicting ones. */
4601 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4602 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4603 if (in_attr->i != out_attr->i)
4604 {
4605 const char *in_abi = NULL, *out_abi = NULL;
4606
4607 switch (in_attr->i)
4608 {
4609 case 1: in_abi = "generic"; break;
4610 case 2: in_abi = "AltiVec"; break;
4611 case 3: in_abi = "SPE"; break;
4612 }
4613
4614 switch (out_attr->i)
4615 {
4616 case 1: out_abi = "generic"; break;
4617 case 2: out_abi = "AltiVec"; break;
4618 case 3: out_abi = "SPE"; break;
4619 }
4620
4621 out_attr->type = 1;
4622 if (out_attr->i == 0)
4623 out_attr->i = in_attr->i;
4624 else if (in_attr->i == 0)
4625 ;
4626 /* For now, allow generic to transition to AltiVec or SPE
4627 without a warning. If GCC marked files with their stack
4628 alignment and used don't-care markings for files which are
4629 not affected by the vector ABI, we could warn about this
4630 case too. */
4631 else if (out_attr->i == 1)
4632 out_attr->i = in_attr->i;
4633 else if (in_attr->i == 1)
4634 ;
4635 else if (in_abi == NULL)
4636 _bfd_error_handler
4637 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4638 in_attr->i);
4639 else if (out_abi == NULL)
4640 _bfd_error_handler
4641 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4642 in_attr->i);
4643 else
4644 _bfd_error_handler
4645 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4646 ibfd, obfd, in_abi, out_abi);
4647 }
4648
4649 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4650 and merge non-conflicting ones. */
4651 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4652 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4653 if (in_attr->i != out_attr->i)
4654 {
4655 out_attr->type = 1;
4656 if (out_attr->i == 0)
4657 out_attr->i = in_attr->i;
4658 else if (in_attr->i == 0)
4659 ;
4660 else if (out_attr->i == 1 && in_attr->i == 2)
4661 _bfd_error_handler
4662 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4663 else if (out_attr->i == 2 && in_attr->i == 1)
4664 _bfd_error_handler
4665 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4666 else if (in_attr->i > 2)
4667 _bfd_error_handler
4668 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4669 in_attr->i);
4670 else
4671 _bfd_error_handler
4672 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4673 out_attr->i);
4674 }
4675
4676 /* Merge Tag_compatibility attributes and any common GNU ones. */
4677 _bfd_elf_merge_object_attributes (ibfd, obfd);
4678
4679 return TRUE;
4680 }
4681
4682 /* Merge backend specific data from an object file to the output
4683 object file when linking. */
4684
4685 static bfd_boolean
4686 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4687 {
4688 flagword old_flags;
4689 flagword new_flags;
4690 bfd_boolean error;
4691
4692 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4693 return TRUE;
4694
4695 /* Check if we have the same endianness. */
4696 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4697 return FALSE;
4698
4699 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4700 return FALSE;
4701
4702 new_flags = elf_elfheader (ibfd)->e_flags;
4703 old_flags = elf_elfheader (obfd)->e_flags;
4704 if (!elf_flags_init (obfd))
4705 {
4706 /* First call, no flags set. */
4707 elf_flags_init (obfd) = TRUE;
4708 elf_elfheader (obfd)->e_flags = new_flags;
4709 }
4710
4711 /* Compatible flags are ok. */
4712 else if (new_flags == old_flags)
4713 ;
4714
4715 /* Incompatible flags. */
4716 else
4717 {
4718 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4719 to be linked with either. */
4720 error = FALSE;
4721 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4722 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4723 {
4724 error = TRUE;
4725 (*_bfd_error_handler)
4726 (_("%B: compiled with -mrelocatable and linked with "
4727 "modules compiled normally"), ibfd);
4728 }
4729 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4730 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4731 {
4732 error = TRUE;
4733 (*_bfd_error_handler)
4734 (_("%B: compiled normally and linked with "
4735 "modules compiled with -mrelocatable"), ibfd);
4736 }
4737
4738 /* The output is -mrelocatable-lib iff both the input files are. */
4739 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4740 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4741
4742 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4743 but each input file is either -mrelocatable or -mrelocatable-lib. */
4744 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4745 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4746 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4747 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4748
4749 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4750 any module uses it. */
4751 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4752
4753 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4754 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4755
4756 /* Warn about any other mismatches. */
4757 if (new_flags != old_flags)
4758 {
4759 error = TRUE;
4760 (*_bfd_error_handler)
4761 (_("%B: uses different e_flags (0x%lx) fields "
4762 "than previous modules (0x%lx)"),
4763 ibfd, (long) new_flags, (long) old_flags);
4764 }
4765
4766 if (error)
4767 {
4768 bfd_set_error (bfd_error_bad_value);
4769 return FALSE;
4770 }
4771 }
4772
4773 return TRUE;
4774 }
4775
4776 static void
4777 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4778 bfd_vma value,
4779 split16_format_type split16_format)
4780
4781 {
4782 unsigned int insn, top5;
4783
4784 insn = bfd_get_32 (output_bfd, loc);
4785 top5 = value & 0xf800;
4786 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4787 insn |= top5;
4788 insn |= value & 0x7ff;
4789 bfd_put_32 (output_bfd, insn, loc);
4790 }
4791
4792 \f
4793 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4794 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4795 int
4796 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4797 struct bfd_link_info *info)
4798 {
4799 struct ppc_elf_link_hash_table *htab;
4800 flagword flags;
4801
4802 htab = ppc_elf_hash_table (info);
4803
4804 if (htab->plt_type == PLT_UNSET)
4805 {
4806 struct elf_link_hash_entry *h;
4807
4808 if (htab->params->plt_style == PLT_OLD)
4809 htab->plt_type = PLT_OLD;
4810 else if (info->shared
4811 && htab->elf.dynamic_sections_created
4812 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4813 FALSE, FALSE, TRUE)) != NULL
4814 && (h->type == STT_FUNC
4815 || h->needs_plt)
4816 && h->ref_regular
4817 && !(SYMBOL_CALLS_LOCAL (info, h)
4818 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4819 && h->root.type == bfd_link_hash_undefweak)))
4820 {
4821 /* Profiling of shared libs (and pies) is not supported with
4822 secure plt, because ppc32 does profiling before a
4823 function prologue and a secure plt pic call stubs needs
4824 r30 to be set up. */
4825 htab->plt_type = PLT_OLD;
4826 }
4827 else
4828 {
4829 bfd *ibfd;
4830 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4831
4832 /* Look through the reloc flags left by ppc_elf_check_relocs.
4833 Use the old style bss plt if a file makes plt calls
4834 without using the new relocs, and if ld isn't given
4835 --secure-plt and we never see REL16 relocs. */
4836 if (plt_type == PLT_UNSET)
4837 plt_type = PLT_OLD;
4838 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4839 if (is_ppc_elf (ibfd))
4840 {
4841 if (ppc_elf_tdata (ibfd)->has_rel16)
4842 plt_type = PLT_NEW;
4843 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4844 {
4845 plt_type = PLT_OLD;
4846 htab->old_bfd = ibfd;
4847 break;
4848 }
4849 }
4850 htab->plt_type = plt_type;
4851 }
4852 }
4853 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4854 {
4855 if (htab->old_bfd != NULL)
4856 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4857 htab->old_bfd);
4858 else
4859 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4860 }
4861
4862 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4863
4864 if (htab->plt_type == PLT_NEW)
4865 {
4866 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4867 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4868
4869 /* The new PLT is a loaded section. */
4870 if (htab->plt != NULL
4871 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4872 return -1;
4873
4874 /* The new GOT is not executable. */
4875 if (htab->got != NULL
4876 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4877 return -1;
4878 }
4879 else
4880 {
4881 /* Stop an unused .glink section from affecting .text alignment. */
4882 if (htab->glink != NULL
4883 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4884 return -1;
4885 }
4886 return htab->plt_type == PLT_NEW;
4887 }
4888 \f
4889 /* Return the section that should be marked against GC for a given
4890 relocation. */
4891
4892 static asection *
4893 ppc_elf_gc_mark_hook (asection *sec,
4894 struct bfd_link_info *info,
4895 Elf_Internal_Rela *rel,
4896 struct elf_link_hash_entry *h,
4897 Elf_Internal_Sym *sym)
4898 {
4899 if (h != NULL)
4900 switch (ELF32_R_TYPE (rel->r_info))
4901 {
4902 case R_PPC_GNU_VTINHERIT:
4903 case R_PPC_GNU_VTENTRY:
4904 return NULL;
4905 }
4906
4907 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4908 }
4909
4910 /* Update the got, plt and dynamic reloc reference counts for the
4911 section being removed. */
4912
4913 static bfd_boolean
4914 ppc_elf_gc_sweep_hook (bfd *abfd,
4915 struct bfd_link_info *info,
4916 asection *sec,
4917 const Elf_Internal_Rela *relocs)
4918 {
4919 struct ppc_elf_link_hash_table *htab;
4920 Elf_Internal_Shdr *symtab_hdr;
4921 struct elf_link_hash_entry **sym_hashes;
4922 bfd_signed_vma *local_got_refcounts;
4923 const Elf_Internal_Rela *rel, *relend;
4924 asection *got2;
4925
4926 if (info->relocatable)
4927 return TRUE;
4928
4929 if ((sec->flags & SEC_ALLOC) == 0)
4930 return TRUE;
4931
4932 elf_section_data (sec)->local_dynrel = NULL;
4933
4934 htab = ppc_elf_hash_table (info);
4935 symtab_hdr = &elf_symtab_hdr (abfd);
4936 sym_hashes = elf_sym_hashes (abfd);
4937 local_got_refcounts = elf_local_got_refcounts (abfd);
4938 got2 = bfd_get_section_by_name (abfd, ".got2");
4939
4940 relend = relocs + sec->reloc_count;
4941 for (rel = relocs; rel < relend; rel++)
4942 {
4943 unsigned long r_symndx;
4944 enum elf_ppc_reloc_type r_type;
4945 struct elf_link_hash_entry *h = NULL;
4946
4947 r_symndx = ELF32_R_SYM (rel->r_info);
4948 if (r_symndx >= symtab_hdr->sh_info)
4949 {
4950 struct elf_dyn_relocs **pp, *p;
4951 struct ppc_elf_link_hash_entry *eh;
4952
4953 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4954 while (h->root.type == bfd_link_hash_indirect
4955 || h->root.type == bfd_link_hash_warning)
4956 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4957 eh = (struct ppc_elf_link_hash_entry *) h;
4958
4959 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4960 if (p->sec == sec)
4961 {
4962 /* Everything must go for SEC. */
4963 *pp = p->next;
4964 break;
4965 }
4966 }
4967
4968 r_type = ELF32_R_TYPE (rel->r_info);
4969 if (!htab->is_vxworks
4970 && h == NULL
4971 && local_got_refcounts != NULL
4972 && (!info->shared
4973 || is_branch_reloc (r_type)))
4974 {
4975 struct plt_entry **local_plt = (struct plt_entry **)
4976 (local_got_refcounts + symtab_hdr->sh_info);
4977 char *local_got_tls_masks = (char *)
4978 (local_plt + symtab_hdr->sh_info);
4979 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4980 {
4981 struct plt_entry **ifunc = local_plt + r_symndx;
4982 bfd_vma addend = 0;
4983 struct plt_entry *ent;
4984
4985 if (r_type == R_PPC_PLTREL24 && info->shared)
4986 addend = rel->r_addend;
4987 ent = find_plt_ent (ifunc, got2, addend);
4988 if (ent->plt.refcount > 0)
4989 ent->plt.refcount -= 1;
4990 continue;
4991 }
4992 }
4993
4994 switch (r_type)
4995 {
4996 case R_PPC_GOT_TLSLD16:
4997 case R_PPC_GOT_TLSLD16_LO:
4998 case R_PPC_GOT_TLSLD16_HI:
4999 case R_PPC_GOT_TLSLD16_HA:
5000 case R_PPC_GOT_TLSGD16:
5001 case R_PPC_GOT_TLSGD16_LO:
5002 case R_PPC_GOT_TLSGD16_HI:
5003 case R_PPC_GOT_TLSGD16_HA:
5004 case R_PPC_GOT_TPREL16:
5005 case R_PPC_GOT_TPREL16_LO:
5006 case R_PPC_GOT_TPREL16_HI:
5007 case R_PPC_GOT_TPREL16_HA:
5008 case R_PPC_GOT_DTPREL16:
5009 case R_PPC_GOT_DTPREL16_LO:
5010 case R_PPC_GOT_DTPREL16_HI:
5011 case R_PPC_GOT_DTPREL16_HA:
5012 case R_PPC_GOT16:
5013 case R_PPC_GOT16_LO:
5014 case R_PPC_GOT16_HI:
5015 case R_PPC_GOT16_HA:
5016 if (h != NULL)
5017 {
5018 if (h->got.refcount > 0)
5019 h->got.refcount--;
5020 if (!info->shared)
5021 {
5022 struct plt_entry *ent;
5023
5024 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5025 if (ent != NULL && ent->plt.refcount > 0)
5026 ent->plt.refcount -= 1;
5027 }
5028 }
5029 else if (local_got_refcounts != NULL)
5030 {
5031 if (local_got_refcounts[r_symndx] > 0)
5032 local_got_refcounts[r_symndx]--;
5033 }
5034 break;
5035
5036 case R_PPC_REL24:
5037 case R_PPC_REL14:
5038 case R_PPC_REL14_BRTAKEN:
5039 case R_PPC_REL14_BRNTAKEN:
5040 case R_PPC_REL32:
5041 if (h == NULL || h == htab->elf.hgot)
5042 break;
5043 /* Fall thru */
5044
5045 case R_PPC_ADDR32:
5046 case R_PPC_ADDR24:
5047 case R_PPC_ADDR16:
5048 case R_PPC_ADDR16_LO:
5049 case R_PPC_ADDR16_HI:
5050 case R_PPC_ADDR16_HA:
5051 case R_PPC_ADDR14:
5052 case R_PPC_ADDR14_BRTAKEN:
5053 case R_PPC_ADDR14_BRNTAKEN:
5054 case R_PPC_UADDR32:
5055 case R_PPC_UADDR16:
5056 if (info->shared)
5057 break;
5058
5059 case R_PPC_PLT32:
5060 case R_PPC_PLTREL24:
5061 case R_PPC_PLTREL32:
5062 case R_PPC_PLT16_LO:
5063 case R_PPC_PLT16_HI:
5064 case R_PPC_PLT16_HA:
5065 if (h != NULL)
5066 {
5067 bfd_vma addend = 0;
5068 struct plt_entry *ent;
5069
5070 if (r_type == R_PPC_PLTREL24 && info->shared)
5071 addend = rel->r_addend;
5072 ent = find_plt_ent (&h->plt.plist, got2, addend);
5073 if (ent != NULL && ent->plt.refcount > 0)
5074 ent->plt.refcount -= 1;
5075 }
5076 break;
5077
5078 default:
5079 break;
5080 }
5081 }
5082 return TRUE;
5083 }
5084 \f
5085 /* Set plt output section type, htab->tls_get_addr, and call the
5086 generic ELF tls_setup function. */
5087
5088 asection *
5089 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5090 {
5091 struct ppc_elf_link_hash_table *htab;
5092
5093 htab = ppc_elf_hash_table (info);
5094 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5095 FALSE, FALSE, TRUE);
5096 if (!htab->params->no_tls_get_addr_opt)
5097 {
5098 struct elf_link_hash_entry *opt, *tga;
5099 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5100 FALSE, FALSE, TRUE);
5101 if (opt != NULL
5102 && (opt->root.type == bfd_link_hash_defined
5103 || opt->root.type == bfd_link_hash_defweak))
5104 {
5105 /* If glibc supports an optimized __tls_get_addr call stub,
5106 signalled by the presence of __tls_get_addr_opt, and we'll
5107 be calling __tls_get_addr via a plt call stub, then
5108 make __tls_get_addr point to __tls_get_addr_opt. */
5109 tga = htab->tls_get_addr;
5110 if (htab->elf.dynamic_sections_created
5111 && tga != NULL
5112 && (tga->type == STT_FUNC
5113 || tga->needs_plt)
5114 && !(SYMBOL_CALLS_LOCAL (info, tga)
5115 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5116 && tga->root.type == bfd_link_hash_undefweak)))
5117 {
5118 struct plt_entry *ent;
5119 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5120 if (ent->plt.refcount > 0)
5121 break;
5122 if (ent != NULL)
5123 {
5124 tga->root.type = bfd_link_hash_indirect;
5125 tga->root.u.i.link = &opt->root;
5126 ppc_elf_copy_indirect_symbol (info, opt, tga);
5127 if (opt->dynindx != -1)
5128 {
5129 /* Use __tls_get_addr_opt in dynamic relocations. */
5130 opt->dynindx = -1;
5131 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5132 opt->dynstr_index);
5133 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5134 return FALSE;
5135 }
5136 htab->tls_get_addr = opt;
5137 }
5138 }
5139 }
5140 else
5141 htab->params->no_tls_get_addr_opt = TRUE;
5142 }
5143 if (htab->plt_type == PLT_NEW
5144 && htab->plt != NULL
5145 && htab->plt->output_section != NULL)
5146 {
5147 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5148 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5149 }
5150
5151 return _bfd_elf_tls_setup (obfd, info);
5152 }
5153
5154 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5155 HASH. */
5156
5157 static bfd_boolean
5158 branch_reloc_hash_match (const bfd *ibfd,
5159 const Elf_Internal_Rela *rel,
5160 const struct elf_link_hash_entry *hash)
5161 {
5162 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5163 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5164 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5165
5166 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5167 {
5168 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5169 struct elf_link_hash_entry *h;
5170
5171 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5172 while (h->root.type == bfd_link_hash_indirect
5173 || h->root.type == bfd_link_hash_warning)
5174 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5175 if (h == hash)
5176 return TRUE;
5177 }
5178 return FALSE;
5179 }
5180
5181 /* Run through all the TLS relocs looking for optimization
5182 opportunities. */
5183
5184 bfd_boolean
5185 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5186 struct bfd_link_info *info)
5187 {
5188 bfd *ibfd;
5189 asection *sec;
5190 struct ppc_elf_link_hash_table *htab;
5191 int pass;
5192
5193 if (info->relocatable || !info->executable)
5194 return TRUE;
5195
5196 htab = ppc_elf_hash_table (info);
5197 if (htab == NULL)
5198 return FALSE;
5199
5200 /* Make two passes through the relocs. First time check that tls
5201 relocs involved in setting up a tls_get_addr call are indeed
5202 followed by such a call. If they are not, don't do any tls
5203 optimization. On the second pass twiddle tls_mask flags to
5204 notify relocate_section that optimization can be done, and
5205 adjust got and plt refcounts. */
5206 for (pass = 0; pass < 2; ++pass)
5207 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5208 {
5209 Elf_Internal_Sym *locsyms = NULL;
5210 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5211 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5212
5213 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5214 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5215 {
5216 Elf_Internal_Rela *relstart, *rel, *relend;
5217 int expecting_tls_get_addr = 0;
5218
5219 /* Read the relocations. */
5220 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5221 info->keep_memory);
5222 if (relstart == NULL)
5223 return FALSE;
5224
5225 relend = relstart + sec->reloc_count;
5226 for (rel = relstart; rel < relend; rel++)
5227 {
5228 enum elf_ppc_reloc_type r_type;
5229 unsigned long r_symndx;
5230 struct elf_link_hash_entry *h = NULL;
5231 char *tls_mask;
5232 char tls_set, tls_clear;
5233 bfd_boolean is_local;
5234 bfd_signed_vma *got_count;
5235
5236 r_symndx = ELF32_R_SYM (rel->r_info);
5237 if (r_symndx >= symtab_hdr->sh_info)
5238 {
5239 struct elf_link_hash_entry **sym_hashes;
5240
5241 sym_hashes = elf_sym_hashes (ibfd);
5242 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5243 while (h->root.type == bfd_link_hash_indirect
5244 || h->root.type == bfd_link_hash_warning)
5245 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5246 }
5247
5248 is_local = FALSE;
5249 if (h == NULL
5250 || !h->def_dynamic)
5251 is_local = TRUE;
5252
5253 r_type = ELF32_R_TYPE (rel->r_info);
5254 /* If this section has old-style __tls_get_addr calls
5255 without marker relocs, then check that each
5256 __tls_get_addr call reloc is preceded by a reloc
5257 that conceivably belongs to the __tls_get_addr arg
5258 setup insn. If we don't find matching arg setup
5259 relocs, don't do any tls optimization. */
5260 if (pass == 0
5261 && sec->has_tls_get_addr_call
5262 && h != NULL
5263 && h == htab->tls_get_addr
5264 && !expecting_tls_get_addr
5265 && is_branch_reloc (r_type))
5266 {
5267 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5268 "TLS optimization disabled\n",
5269 ibfd, sec, rel->r_offset);
5270 if (elf_section_data (sec)->relocs != relstart)
5271 free (relstart);
5272 return TRUE;
5273 }
5274
5275 expecting_tls_get_addr = 0;
5276 switch (r_type)
5277 {
5278 case R_PPC_GOT_TLSLD16:
5279 case R_PPC_GOT_TLSLD16_LO:
5280 expecting_tls_get_addr = 1;
5281 /* Fall thru */
5282
5283 case R_PPC_GOT_TLSLD16_HI:
5284 case R_PPC_GOT_TLSLD16_HA:
5285 /* These relocs should never be against a symbol
5286 defined in a shared lib. Leave them alone if
5287 that turns out to be the case. */
5288 if (!is_local)
5289 continue;
5290
5291 /* LD -> LE */
5292 tls_set = 0;
5293 tls_clear = TLS_LD;
5294 break;
5295
5296 case R_PPC_GOT_TLSGD16:
5297 case R_PPC_GOT_TLSGD16_LO:
5298 expecting_tls_get_addr = 1;
5299 /* Fall thru */
5300
5301 case R_PPC_GOT_TLSGD16_HI:
5302 case R_PPC_GOT_TLSGD16_HA:
5303 if (is_local)
5304 /* GD -> LE */
5305 tls_set = 0;
5306 else
5307 /* GD -> IE */
5308 tls_set = TLS_TLS | TLS_TPRELGD;
5309 tls_clear = TLS_GD;
5310 break;
5311
5312 case R_PPC_GOT_TPREL16:
5313 case R_PPC_GOT_TPREL16_LO:
5314 case R_PPC_GOT_TPREL16_HI:
5315 case R_PPC_GOT_TPREL16_HA:
5316 if (is_local)
5317 {
5318 /* IE -> LE */
5319 tls_set = 0;
5320 tls_clear = TLS_TPREL;
5321 break;
5322 }
5323 else
5324 continue;
5325
5326 case R_PPC_TLSGD:
5327 case R_PPC_TLSLD:
5328 expecting_tls_get_addr = 2;
5329 tls_set = 0;
5330 tls_clear = 0;
5331 break;
5332
5333 default:
5334 continue;
5335 }
5336
5337 if (pass == 0)
5338 {
5339 if (!expecting_tls_get_addr
5340 || (expecting_tls_get_addr == 1
5341 && !sec->has_tls_get_addr_call))
5342 continue;
5343
5344 if (rel + 1 < relend
5345 && branch_reloc_hash_match (ibfd, rel + 1,
5346 htab->tls_get_addr))
5347 continue;
5348
5349 /* Uh oh, we didn't find the expected call. We
5350 could just mark this symbol to exclude it
5351 from tls optimization but it's safer to skip
5352 the entire optimization. */
5353 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5354 "TLS optimization disabled\n"),
5355 ibfd, sec, rel->r_offset);
5356 if (elf_section_data (sec)->relocs != relstart)
5357 free (relstart);
5358 return TRUE;
5359 }
5360
5361 if (expecting_tls_get_addr)
5362 {
5363 struct plt_entry *ent;
5364 bfd_vma addend = 0;
5365
5366 if (info->shared
5367 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5368 addend = rel[1].r_addend;
5369 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5370 got2, addend);
5371 if (ent != NULL && ent->plt.refcount > 0)
5372 ent->plt.refcount -= 1;
5373
5374 if (expecting_tls_get_addr == 2)
5375 continue;
5376 }
5377
5378 if (h != NULL)
5379 {
5380 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5381 got_count = &h->got.refcount;
5382 }
5383 else
5384 {
5385 bfd_signed_vma *lgot_refs;
5386 struct plt_entry **local_plt;
5387 char *lgot_masks;
5388
5389 if (locsyms == NULL)
5390 {
5391 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5392 if (locsyms == NULL)
5393 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5394 symtab_hdr->sh_info,
5395 0, NULL, NULL, NULL);
5396 if (locsyms == NULL)
5397 {
5398 if (elf_section_data (sec)->relocs != relstart)
5399 free (relstart);
5400 return FALSE;
5401 }
5402 }
5403 lgot_refs = elf_local_got_refcounts (ibfd);
5404 if (lgot_refs == NULL)
5405 abort ();
5406 local_plt = (struct plt_entry **)
5407 (lgot_refs + symtab_hdr->sh_info);
5408 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5409 tls_mask = &lgot_masks[r_symndx];
5410 got_count = &lgot_refs[r_symndx];
5411 }
5412
5413 if (tls_set == 0)
5414 {
5415 /* We managed to get rid of a got entry. */
5416 if (*got_count > 0)
5417 *got_count -= 1;
5418 }
5419
5420 *tls_mask |= tls_set;
5421 *tls_mask &= ~tls_clear;
5422 }
5423
5424 if (elf_section_data (sec)->relocs != relstart)
5425 free (relstart);
5426 }
5427
5428 if (locsyms != NULL
5429 && (symtab_hdr->contents != (unsigned char *) locsyms))
5430 {
5431 if (!info->keep_memory)
5432 free (locsyms);
5433 else
5434 symtab_hdr->contents = (unsigned char *) locsyms;
5435 }
5436 }
5437 return TRUE;
5438 }
5439 \f
5440 /* Return true if we have dynamic relocs that apply to read-only sections. */
5441
5442 static bfd_boolean
5443 readonly_dynrelocs (struct elf_link_hash_entry *h)
5444 {
5445 struct elf_dyn_relocs *p;
5446
5447 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5448 {
5449 asection *s = p->sec->output_section;
5450
5451 if (s != NULL
5452 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5453 == (SEC_READONLY | SEC_ALLOC)))
5454 return TRUE;
5455 }
5456 return FALSE;
5457 }
5458
5459 /* Adjust a symbol defined by a dynamic object and referenced by a
5460 regular object. The current definition is in some section of the
5461 dynamic object, but we're not including those sections. We have to
5462 change the definition to something the rest of the link can
5463 understand. */
5464
5465 static bfd_boolean
5466 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5467 struct elf_link_hash_entry *h)
5468 {
5469 struct ppc_elf_link_hash_table *htab;
5470 asection *s;
5471
5472 #ifdef DEBUG
5473 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5474 h->root.root.string);
5475 #endif
5476
5477 /* Make sure we know what is going on here. */
5478 htab = ppc_elf_hash_table (info);
5479 BFD_ASSERT (htab->elf.dynobj != NULL
5480 && (h->needs_plt
5481 || h->type == STT_GNU_IFUNC
5482 || h->u.weakdef != NULL
5483 || (h->def_dynamic
5484 && h->ref_regular
5485 && !h->def_regular)));
5486
5487 /* Deal with function syms. */
5488 if (h->type == STT_FUNC
5489 || h->type == STT_GNU_IFUNC
5490 || h->needs_plt)
5491 {
5492 /* Clear procedure linkage table information for any symbol that
5493 won't need a .plt entry. */
5494 struct plt_entry *ent;
5495 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5496 if (ent->plt.refcount > 0)
5497 break;
5498 if (ent == NULL
5499 || (h->type != STT_GNU_IFUNC
5500 && (SYMBOL_CALLS_LOCAL (info, h)
5501 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5502 && h->root.type == bfd_link_hash_undefweak))))
5503 {
5504 /* A PLT entry is not required/allowed when:
5505
5506 1. We are not using ld.so; because then the PLT entry
5507 can't be set up, so we can't use one. In this case,
5508 ppc_elf_adjust_dynamic_symbol won't even be called.
5509
5510 2. GC has rendered the entry unused.
5511
5512 3. We know for certain that a call to this symbol
5513 will go to this object, or will remain undefined. */
5514 h->plt.plist = NULL;
5515 h->needs_plt = 0;
5516 h->pointer_equality_needed = 0;
5517 }
5518 else
5519 {
5520 /* Taking a function's address in a read/write section
5521 doesn't require us to define the function symbol in the
5522 executable on a plt call stub. A dynamic reloc can
5523 be used instead. */
5524 if (h->pointer_equality_needed
5525 && h->type != STT_GNU_IFUNC
5526 && !htab->is_vxworks
5527 && !ppc_elf_hash_entry (h)->has_sda_refs
5528 && !readonly_dynrelocs (h))
5529 {
5530 h->pointer_equality_needed = 0;
5531 h->non_got_ref = 0;
5532 }
5533
5534 /* After adjust_dynamic_symbol, non_got_ref set in the
5535 non-shared case means that we have allocated space in
5536 .dynbss for the symbol and thus dyn_relocs for this
5537 symbol should be discarded.
5538 If we get here we know we are making a PLT entry for this
5539 symbol, and in an executable we'd normally resolve
5540 relocations against this symbol to the PLT entry. Allow
5541 dynamic relocs if the reference is weak, and the dynamic
5542 relocs will not cause text relocation. */
5543 else if (!h->ref_regular_nonweak
5544 && h->non_got_ref
5545 && h->type != STT_GNU_IFUNC
5546 && !htab->is_vxworks
5547 && !ppc_elf_hash_entry (h)->has_sda_refs
5548 && !readonly_dynrelocs (h))
5549 h->non_got_ref = 0;
5550 }
5551 return TRUE;
5552 }
5553 else
5554 h->plt.plist = NULL;
5555
5556 /* If this is a weak symbol, and there is a real definition, the
5557 processor independent code will have arranged for us to see the
5558 real definition first, and we can just use the same value. */
5559 if (h->u.weakdef != NULL)
5560 {
5561 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5562 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5563 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5564 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5565 if (ELIMINATE_COPY_RELOCS)
5566 h->non_got_ref = h->u.weakdef->non_got_ref;
5567 return TRUE;
5568 }
5569
5570 /* This is a reference to a symbol defined by a dynamic object which
5571 is not a function. */
5572
5573 /* If we are creating a shared library, we must presume that the
5574 only references to the symbol are via the global offset table.
5575 For such cases we need not do anything here; the relocations will
5576 be handled correctly by relocate_section. */
5577 if (info->shared)
5578 return TRUE;
5579
5580 /* If there are no references to this symbol that do not use the
5581 GOT, we don't need to generate a copy reloc. */
5582 if (!h->non_got_ref)
5583 return TRUE;
5584
5585 /* If we didn't find any dynamic relocs in read-only sections, then
5586 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5587 We can't do this if there are any small data relocations. This
5588 doesn't work on VxWorks, where we can not have dynamic
5589 relocations (other than copy and jump slot relocations) in an
5590 executable. */
5591 if (ELIMINATE_COPY_RELOCS
5592 && !ppc_elf_hash_entry (h)->has_sda_refs
5593 && !htab->is_vxworks
5594 && !h->def_regular
5595 && !readonly_dynrelocs (h))
5596 {
5597 h->non_got_ref = 0;
5598 return TRUE;
5599 }
5600
5601 /* We must allocate the symbol in our .dynbss section, which will
5602 become part of the .bss section of the executable. There will be
5603 an entry for this symbol in the .dynsym section. The dynamic
5604 object will contain position independent code, so all references
5605 from the dynamic object to this symbol will go through the global
5606 offset table. The dynamic linker will use the .dynsym entry to
5607 determine the address it must put in the global offset table, so
5608 both the dynamic object and the regular object will refer to the
5609 same memory location for the variable.
5610
5611 Of course, if the symbol is referenced using SDAREL relocs, we
5612 must instead allocate it in .sbss. */
5613
5614 if (ppc_elf_hash_entry (h)->has_sda_refs)
5615 s = htab->dynsbss;
5616 else
5617 s = htab->dynbss;
5618 BFD_ASSERT (s != NULL);
5619
5620 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5621 copy the initial value out of the dynamic object and into the
5622 runtime process image. We need to remember the offset into the
5623 .rela.bss section we are going to use. */
5624 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5625 {
5626 asection *srel;
5627
5628 if (ppc_elf_hash_entry (h)->has_sda_refs)
5629 srel = htab->relsbss;
5630 else
5631 srel = htab->relbss;
5632 BFD_ASSERT (srel != NULL);
5633 srel->size += sizeof (Elf32_External_Rela);
5634 h->needs_copy = 1;
5635 }
5636
5637 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5638 }
5639 \f
5640 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5641 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5642 specifying the addend on the plt relocation. For -fpic code, the sym
5643 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5644 xxxxxxxx.got2.plt_pic32.<callee>. */
5645
5646 static bfd_boolean
5647 add_stub_sym (struct plt_entry *ent,
5648 struct elf_link_hash_entry *h,
5649 struct bfd_link_info *info)
5650 {
5651 struct elf_link_hash_entry *sh;
5652 size_t len1, len2, len3;
5653 char *name;
5654 const char *stub;
5655 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5656
5657 if (info->shared)
5658 stub = ".plt_pic32.";
5659 else
5660 stub = ".plt_call32.";
5661
5662 len1 = strlen (h->root.root.string);
5663 len2 = strlen (stub);
5664 len3 = 0;
5665 if (ent->sec)
5666 len3 = strlen (ent->sec->name);
5667 name = bfd_malloc (len1 + len2 + len3 + 9);
5668 if (name == NULL)
5669 return FALSE;
5670 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5671 if (ent->sec)
5672 memcpy (name + 8, ent->sec->name, len3);
5673 memcpy (name + 8 + len3, stub, len2);
5674 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5675 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5676 if (sh == NULL)
5677 return FALSE;
5678 if (sh->root.type == bfd_link_hash_new)
5679 {
5680 sh->root.type = bfd_link_hash_defined;
5681 sh->root.u.def.section = htab->glink;
5682 sh->root.u.def.value = ent->glink_offset;
5683 sh->ref_regular = 1;
5684 sh->def_regular = 1;
5685 sh->ref_regular_nonweak = 1;
5686 sh->forced_local = 1;
5687 sh->non_elf = 0;
5688 }
5689 return TRUE;
5690 }
5691
5692 /* Allocate NEED contiguous space in .got, and return the offset.
5693 Handles allocation of the got header when crossing 32k. */
5694
5695 static bfd_vma
5696 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5697 {
5698 bfd_vma where;
5699 unsigned int max_before_header;
5700
5701 if (htab->plt_type == PLT_VXWORKS)
5702 {
5703 where = htab->got->size;
5704 htab->got->size += need;
5705 }
5706 else
5707 {
5708 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5709 if (need <= htab->got_gap)
5710 {
5711 where = max_before_header - htab->got_gap;
5712 htab->got_gap -= need;
5713 }
5714 else
5715 {
5716 if (htab->got->size + need > max_before_header
5717 && htab->got->size <= max_before_header)
5718 {
5719 htab->got_gap = max_before_header - htab->got->size;
5720 htab->got->size = max_before_header + htab->got_header_size;
5721 }
5722 where = htab->got->size;
5723 htab->got->size += need;
5724 }
5725 }
5726 return where;
5727 }
5728
5729 /* Allocate space in associated reloc sections for dynamic relocs. */
5730
5731 static bfd_boolean
5732 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5733 {
5734 struct bfd_link_info *info = inf;
5735 struct ppc_elf_link_hash_entry *eh;
5736 struct ppc_elf_link_hash_table *htab;
5737 struct elf_dyn_relocs *p;
5738
5739 if (h->root.type == bfd_link_hash_indirect)
5740 return TRUE;
5741
5742 htab = ppc_elf_hash_table (info);
5743 if (htab->elf.dynamic_sections_created
5744 || h->type == STT_GNU_IFUNC)
5745 {
5746 struct plt_entry *ent;
5747 bfd_boolean doneone = FALSE;
5748 bfd_vma plt_offset = 0, glink_offset = 0;
5749 bfd_boolean dyn;
5750
5751 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5752 if (ent->plt.refcount > 0)
5753 {
5754 /* Make sure this symbol is output as a dynamic symbol. */
5755 if (h->dynindx == -1
5756 && !h->forced_local
5757 && !h->def_regular
5758 && htab->elf.dynamic_sections_created)
5759 {
5760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5761 return FALSE;
5762 }
5763
5764 dyn = htab->elf.dynamic_sections_created;
5765 if (info->shared
5766 || h->type == STT_GNU_IFUNC
5767 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5768 {
5769 asection *s = htab->plt;
5770 if (!dyn || h->dynindx == -1)
5771 s = htab->iplt;
5772
5773 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5774 {
5775 if (!doneone)
5776 {
5777 plt_offset = s->size;
5778 s->size += 4;
5779 }
5780 ent->plt.offset = plt_offset;
5781
5782 s = htab->glink;
5783 if (!doneone || info->shared)
5784 {
5785 glink_offset = s->size;
5786 s->size += GLINK_ENTRY_SIZE;
5787 if (h == htab->tls_get_addr
5788 && !htab->params->no_tls_get_addr_opt)
5789 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5790 }
5791 if (!doneone
5792 && !info->shared
5793 && h->def_dynamic
5794 && !h->def_regular)
5795 {
5796 h->root.u.def.section = s;
5797 h->root.u.def.value = glink_offset;
5798 }
5799 ent->glink_offset = glink_offset;
5800
5801 if (htab->params->emit_stub_syms
5802 && !add_stub_sym (ent, h, info))
5803 return FALSE;
5804 }
5805 else
5806 {
5807 if (!doneone)
5808 {
5809 /* If this is the first .plt entry, make room
5810 for the special first entry. */
5811 if (s->size == 0)
5812 s->size += htab->plt_initial_entry_size;
5813
5814 /* The PowerPC PLT is actually composed of two
5815 parts, the first part is 2 words (for a load
5816 and a jump), and then there is a remaining
5817 word available at the end. */
5818 plt_offset = (htab->plt_initial_entry_size
5819 + (htab->plt_slot_size
5820 * ((s->size
5821 - htab->plt_initial_entry_size)
5822 / htab->plt_entry_size)));
5823
5824 /* If this symbol is not defined in a regular
5825 file, and we are not generating a shared
5826 library, then set the symbol to this location
5827 in the .plt. This is to avoid text
5828 relocations, and is required to make
5829 function pointers compare as equal between
5830 the normal executable and the shared library. */
5831 if (! info->shared
5832 && h->def_dynamic
5833 && !h->def_regular)
5834 {
5835 h->root.u.def.section = s;
5836 h->root.u.def.value = plt_offset;
5837 }
5838
5839 /* Make room for this entry. */
5840 s->size += htab->plt_entry_size;
5841 /* After the 8192nd entry, room for two entries
5842 is allocated. */
5843 if (htab->plt_type == PLT_OLD
5844 && (s->size - htab->plt_initial_entry_size)
5845 / htab->plt_entry_size
5846 > PLT_NUM_SINGLE_ENTRIES)
5847 s->size += htab->plt_entry_size;
5848 }
5849 ent->plt.offset = plt_offset;
5850 }
5851
5852 /* We also need to make an entry in the .rela.plt section. */
5853 if (!doneone)
5854 {
5855 if (!htab->elf.dynamic_sections_created
5856 || h->dynindx == -1)
5857 htab->reliplt->size += sizeof (Elf32_External_Rela);
5858 else
5859 {
5860 htab->relplt->size += sizeof (Elf32_External_Rela);
5861
5862 if (htab->plt_type == PLT_VXWORKS)
5863 {
5864 /* Allocate space for the unloaded relocations. */
5865 if (!info->shared
5866 && htab->elf.dynamic_sections_created)
5867 {
5868 if (ent->plt.offset
5869 == (bfd_vma) htab->plt_initial_entry_size)
5870 {
5871 htab->srelplt2->size
5872 += (sizeof (Elf32_External_Rela)
5873 * VXWORKS_PLTRESOLVE_RELOCS);
5874 }
5875
5876 htab->srelplt2->size
5877 += (sizeof (Elf32_External_Rela)
5878 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5879 }
5880
5881 /* Every PLT entry has an associated GOT entry in
5882 .got.plt. */
5883 htab->sgotplt->size += 4;
5884 }
5885 }
5886 doneone = TRUE;
5887 }
5888 }
5889 else
5890 ent->plt.offset = (bfd_vma) -1;
5891 }
5892 else
5893 ent->plt.offset = (bfd_vma) -1;
5894
5895 if (!doneone)
5896 {
5897 h->plt.plist = NULL;
5898 h->needs_plt = 0;
5899 }
5900 }
5901 else
5902 {
5903 h->plt.plist = NULL;
5904 h->needs_plt = 0;
5905 }
5906
5907 eh = (struct ppc_elf_link_hash_entry *) h;
5908 if (eh->elf.got.refcount > 0)
5909 {
5910 bfd_boolean dyn;
5911 unsigned int need;
5912
5913 /* Make sure this symbol is output as a dynamic symbol. */
5914 if (eh->elf.dynindx == -1
5915 && !eh->elf.forced_local
5916 && eh->elf.type != STT_GNU_IFUNC
5917 && htab->elf.dynamic_sections_created)
5918 {
5919 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5920 return FALSE;
5921 }
5922
5923 need = 0;
5924 if ((eh->tls_mask & TLS_TLS) != 0)
5925 {
5926 if ((eh->tls_mask & TLS_LD) != 0)
5927 {
5928 if (!eh->elf.def_dynamic)
5929 /* We'll just use htab->tlsld_got.offset. This should
5930 always be the case. It's a little odd if we have
5931 a local dynamic reloc against a non-local symbol. */
5932 htab->tlsld_got.refcount += 1;
5933 else
5934 need += 8;
5935 }
5936 if ((eh->tls_mask & TLS_GD) != 0)
5937 need += 8;
5938 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5939 need += 4;
5940 if ((eh->tls_mask & TLS_DTPREL) != 0)
5941 need += 4;
5942 }
5943 else
5944 need += 4;
5945 if (need == 0)
5946 eh->elf.got.offset = (bfd_vma) -1;
5947 else
5948 {
5949 eh->elf.got.offset = allocate_got (htab, need);
5950 dyn = htab->elf.dynamic_sections_created;
5951 if ((info->shared
5952 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5953 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5954 || eh->elf.root.type != bfd_link_hash_undefweak))
5955 {
5956 asection *rsec = htab->relgot;
5957
5958 if (eh->elf.type == STT_GNU_IFUNC)
5959 rsec = htab->reliplt;
5960 /* All the entries we allocated need relocs.
5961 Except LD only needs one. */
5962 if ((eh->tls_mask & TLS_LD) != 0
5963 && eh->elf.def_dynamic)
5964 need -= 4;
5965 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5966 }
5967 }
5968 }
5969 else
5970 eh->elf.got.offset = (bfd_vma) -1;
5971
5972 if (eh->dyn_relocs == NULL
5973 || !htab->elf.dynamic_sections_created)
5974 return TRUE;
5975
5976 /* In the shared -Bsymbolic case, discard space allocated for
5977 dynamic pc-relative relocs against symbols which turn out to be
5978 defined in regular objects. For the normal shared case, discard
5979 space for relocs that have become local due to symbol visibility
5980 changes. */
5981
5982 if (info->shared)
5983 {
5984 /* Relocs that use pc_count are those that appear on a call insn,
5985 or certain REL relocs (see must_be_dyn_reloc) that can be
5986 generated via assembly. We want calls to protected symbols to
5987 resolve directly to the function rather than going via the plt.
5988 If people want function pointer comparisons to work as expected
5989 then they should avoid writing weird assembly. */
5990 if (SYMBOL_CALLS_LOCAL (info, h))
5991 {
5992 struct elf_dyn_relocs **pp;
5993
5994 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5995 {
5996 p->count -= p->pc_count;
5997 p->pc_count = 0;
5998 if (p->count == 0)
5999 *pp = p->next;
6000 else
6001 pp = &p->next;
6002 }
6003 }
6004
6005 if (htab->is_vxworks)
6006 {
6007 struct elf_dyn_relocs **pp;
6008
6009 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6010 {
6011 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6012 *pp = p->next;
6013 else
6014 pp = &p->next;
6015 }
6016 }
6017
6018 /* Discard relocs on undefined symbols that must be local. */
6019 if (eh->dyn_relocs != NULL
6020 && h->root.type == bfd_link_hash_undefined
6021 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6022 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6023 eh->dyn_relocs = NULL;
6024
6025 /* Also discard relocs on undefined weak syms with non-default
6026 visibility. */
6027 if (eh->dyn_relocs != NULL
6028 && h->root.type == bfd_link_hash_undefweak)
6029 {
6030 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6031 eh->dyn_relocs = NULL;
6032
6033 /* Make sure undefined weak symbols are output as a dynamic
6034 symbol in PIEs. */
6035 else if (h->dynindx == -1
6036 && !h->forced_local
6037 && !h->def_regular)
6038 {
6039 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6040 return FALSE;
6041 }
6042 }
6043 }
6044 else if (ELIMINATE_COPY_RELOCS)
6045 {
6046 /* For the non-shared case, discard space for relocs against
6047 symbols which turn out to need copy relocs or are not
6048 dynamic. */
6049
6050 if (!h->non_got_ref
6051 && !h->def_regular)
6052 {
6053 /* Make sure this symbol is output as a dynamic symbol.
6054 Undefined weak syms won't yet be marked as dynamic. */
6055 if (h->dynindx == -1
6056 && !h->forced_local)
6057 {
6058 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6059 return FALSE;
6060 }
6061
6062 /* If that succeeded, we know we'll be keeping all the
6063 relocs. */
6064 if (h->dynindx != -1)
6065 goto keep;
6066 }
6067
6068 eh->dyn_relocs = NULL;
6069
6070 keep: ;
6071 }
6072
6073 /* Finally, allocate space. */
6074 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6075 {
6076 asection *sreloc = elf_section_data (p->sec)->sreloc;
6077 if (eh->elf.type == STT_GNU_IFUNC)
6078 sreloc = htab->reliplt;
6079 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6080 }
6081
6082 return TRUE;
6083 }
6084
6085 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6086 read-only sections. */
6087
6088 static bfd_boolean
6089 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6090 {
6091 if (h->root.type == bfd_link_hash_indirect)
6092 return TRUE;
6093
6094 if (readonly_dynrelocs (h))
6095 {
6096 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6097
6098 /* Not an error, just cut short the traversal. */
6099 return FALSE;
6100 }
6101 return TRUE;
6102 }
6103
6104 static const unsigned char glink_eh_frame_cie[] =
6105 {
6106 0, 0, 0, 16, /* length. */
6107 0, 0, 0, 0, /* id. */
6108 1, /* CIE version. */
6109 'z', 'R', 0, /* Augmentation string. */
6110 4, /* Code alignment. */
6111 0x7c, /* Data alignment. */
6112 65, /* RA reg. */
6113 1, /* Augmentation size. */
6114 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6115 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6116 };
6117
6118 /* Set the sizes of the dynamic sections. */
6119
6120 static bfd_boolean
6121 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6122 struct bfd_link_info *info)
6123 {
6124 struct ppc_elf_link_hash_table *htab;
6125 asection *s;
6126 bfd_boolean relocs;
6127 bfd *ibfd;
6128
6129 #ifdef DEBUG
6130 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6131 #endif
6132
6133 htab = ppc_elf_hash_table (info);
6134 BFD_ASSERT (htab->elf.dynobj != NULL);
6135
6136 if (elf_hash_table (info)->dynamic_sections_created)
6137 {
6138 /* Set the contents of the .interp section to the interpreter. */
6139 if (info->executable)
6140 {
6141 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6142 BFD_ASSERT (s != NULL);
6143 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6144 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6145 }
6146 }
6147
6148 if (htab->plt_type == PLT_OLD)
6149 htab->got_header_size = 16;
6150 else if (htab->plt_type == PLT_NEW)
6151 htab->got_header_size = 12;
6152
6153 /* Set up .got offsets for local syms, and space for local dynamic
6154 relocs. */
6155 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6156 {
6157 bfd_signed_vma *local_got;
6158 bfd_signed_vma *end_local_got;
6159 struct plt_entry **local_plt;
6160 struct plt_entry **end_local_plt;
6161 char *lgot_masks;
6162 bfd_size_type locsymcount;
6163 Elf_Internal_Shdr *symtab_hdr;
6164
6165 if (!is_ppc_elf (ibfd))
6166 continue;
6167
6168 for (s = ibfd->sections; s != NULL; s = s->next)
6169 {
6170 struct ppc_dyn_relocs *p;
6171
6172 for (p = ((struct ppc_dyn_relocs *)
6173 elf_section_data (s)->local_dynrel);
6174 p != NULL;
6175 p = p->next)
6176 {
6177 if (!bfd_is_abs_section (p->sec)
6178 && bfd_is_abs_section (p->sec->output_section))
6179 {
6180 /* Input section has been discarded, either because
6181 it is a copy of a linkonce section or due to
6182 linker script /DISCARD/, so we'll be discarding
6183 the relocs too. */
6184 }
6185 else if (htab->is_vxworks
6186 && strcmp (p->sec->output_section->name,
6187 ".tls_vars") == 0)
6188 {
6189 /* Relocations in vxworks .tls_vars sections are
6190 handled specially by the loader. */
6191 }
6192 else if (p->count != 0)
6193 {
6194 asection *sreloc = elf_section_data (p->sec)->sreloc;
6195 if (p->ifunc)
6196 sreloc = htab->reliplt;
6197 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6198 if ((p->sec->output_section->flags
6199 & (SEC_READONLY | SEC_ALLOC))
6200 == (SEC_READONLY | SEC_ALLOC))
6201 info->flags |= DF_TEXTREL;
6202 }
6203 }
6204 }
6205
6206 local_got = elf_local_got_refcounts (ibfd);
6207 if (!local_got)
6208 continue;
6209
6210 symtab_hdr = &elf_symtab_hdr (ibfd);
6211 locsymcount = symtab_hdr->sh_info;
6212 end_local_got = local_got + locsymcount;
6213 local_plt = (struct plt_entry **) end_local_got;
6214 end_local_plt = local_plt + locsymcount;
6215 lgot_masks = (char *) end_local_plt;
6216
6217 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6218 if (*local_got > 0)
6219 {
6220 unsigned int need = 0;
6221 if ((*lgot_masks & TLS_TLS) != 0)
6222 {
6223 if ((*lgot_masks & TLS_GD) != 0)
6224 need += 8;
6225 if ((*lgot_masks & TLS_LD) != 0)
6226 htab->tlsld_got.refcount += 1;
6227 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6228 need += 4;
6229 if ((*lgot_masks & TLS_DTPREL) != 0)
6230 need += 4;
6231 }
6232 else
6233 need += 4;
6234 if (need == 0)
6235 *local_got = (bfd_vma) -1;
6236 else
6237 {
6238 *local_got = allocate_got (htab, need);
6239 if (info->shared)
6240 {
6241 asection *srel = htab->relgot;
6242 if ((*lgot_masks & PLT_IFUNC) != 0)
6243 srel = htab->reliplt;
6244 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6245 }
6246 }
6247 }
6248 else
6249 *local_got = (bfd_vma) -1;
6250
6251 if (htab->is_vxworks)
6252 continue;
6253
6254 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6255 for (; local_plt < end_local_plt; ++local_plt)
6256 {
6257 struct plt_entry *ent;
6258 bfd_boolean doneone = FALSE;
6259 bfd_vma plt_offset = 0, glink_offset = 0;
6260
6261 for (ent = *local_plt; ent != NULL; ent = ent->next)
6262 if (ent->plt.refcount > 0)
6263 {
6264 s = htab->iplt;
6265
6266 if (!doneone)
6267 {
6268 plt_offset = s->size;
6269 s->size += 4;
6270 }
6271 ent->plt.offset = plt_offset;
6272
6273 s = htab->glink;
6274 if (!doneone || info->shared)
6275 {
6276 glink_offset = s->size;
6277 s->size += GLINK_ENTRY_SIZE;
6278 }
6279 ent->glink_offset = glink_offset;
6280
6281 if (!doneone)
6282 {
6283 htab->reliplt->size += sizeof (Elf32_External_Rela);
6284 doneone = TRUE;
6285 }
6286 }
6287 else
6288 ent->plt.offset = (bfd_vma) -1;
6289 }
6290 }
6291
6292 /* Allocate space for global sym dynamic relocs. */
6293 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6294
6295 if (htab->tlsld_got.refcount > 0)
6296 {
6297 htab->tlsld_got.offset = allocate_got (htab, 8);
6298 if (info->shared)
6299 htab->relgot->size += sizeof (Elf32_External_Rela);
6300 }
6301 else
6302 htab->tlsld_got.offset = (bfd_vma) -1;
6303
6304 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6305 {
6306 unsigned int g_o_t = 32768;
6307
6308 /* If we haven't allocated the header, do so now. When we get here,
6309 for old plt/got the got size will be 0 to 32764 (not allocated),
6310 or 32780 to 65536 (header allocated). For new plt/got, the
6311 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6312 if (htab->got->size <= 32768)
6313 {
6314 g_o_t = htab->got->size;
6315 if (htab->plt_type == PLT_OLD)
6316 g_o_t += 4;
6317 htab->got->size += htab->got_header_size;
6318 }
6319
6320 htab->elf.hgot->root.u.def.value = g_o_t;
6321 }
6322 if (info->shared)
6323 {
6324 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6325
6326 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6327 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6328 }
6329 if (info->emitrelocations)
6330 {
6331 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6332
6333 if (sda != NULL && sda->ref_regular)
6334 sda->root.u.def.section->flags |= SEC_KEEP;
6335 sda = htab->sdata[1].sym;
6336 if (sda != NULL && sda->ref_regular)
6337 sda->root.u.def.section->flags |= SEC_KEEP;
6338 }
6339
6340 if (htab->glink != NULL
6341 && htab->glink->size != 0
6342 && htab->elf.dynamic_sections_created)
6343 {
6344 htab->glink_pltresolve = htab->glink->size;
6345 /* Space for the branch table. */
6346 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6347 /* Pad out to align the start of PLTresolve. */
6348 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6349 ? 63 : 15);
6350 htab->glink->size += GLINK_PLTRESOLVE;
6351
6352 if (htab->params->emit_stub_syms)
6353 {
6354 struct elf_link_hash_entry *sh;
6355 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6356 TRUE, FALSE, FALSE);
6357 if (sh == NULL)
6358 return FALSE;
6359 if (sh->root.type == bfd_link_hash_new)
6360 {
6361 sh->root.type = bfd_link_hash_defined;
6362 sh->root.u.def.section = htab->glink;
6363 sh->root.u.def.value = htab->glink_pltresolve;
6364 sh->ref_regular = 1;
6365 sh->def_regular = 1;
6366 sh->ref_regular_nonweak = 1;
6367 sh->forced_local = 1;
6368 sh->non_elf = 0;
6369 }
6370 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6371 TRUE, FALSE, FALSE);
6372 if (sh == NULL)
6373 return FALSE;
6374 if (sh->root.type == bfd_link_hash_new)
6375 {
6376 sh->root.type = bfd_link_hash_defined;
6377 sh->root.u.def.section = htab->glink;
6378 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6379 sh->ref_regular = 1;
6380 sh->def_regular = 1;
6381 sh->ref_regular_nonweak = 1;
6382 sh->forced_local = 1;
6383 sh->non_elf = 0;
6384 }
6385 }
6386 }
6387
6388 if (htab->glink != NULL
6389 && htab->glink->size != 0
6390 && htab->glink_eh_frame != NULL
6391 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6392 && _bfd_elf_eh_frame_present (info))
6393 {
6394 s = htab->glink_eh_frame;
6395 s->size = sizeof (glink_eh_frame_cie) + 20;
6396 if (info->shared)
6397 {
6398 s->size += 4;
6399 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6400 s->size += 4;
6401 }
6402 }
6403
6404 /* We've now determined the sizes of the various dynamic sections.
6405 Allocate memory for them. */
6406 relocs = FALSE;
6407 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6408 {
6409 bfd_boolean strip_section = TRUE;
6410
6411 if ((s->flags & SEC_LINKER_CREATED) == 0)
6412 continue;
6413
6414 if (s == htab->plt
6415 || s == htab->got)
6416 {
6417 /* We'd like to strip these sections if they aren't needed, but if
6418 we've exported dynamic symbols from them we must leave them.
6419 It's too late to tell BFD to get rid of the symbols. */
6420 if (htab->elf.hplt != NULL)
6421 strip_section = FALSE;
6422 /* Strip this section if we don't need it; see the
6423 comment below. */
6424 }
6425 else if (s == htab->iplt
6426 || s == htab->glink
6427 || s == htab->glink_eh_frame
6428 || s == htab->sgotplt
6429 || s == htab->sbss
6430 || s == htab->dynbss
6431 || s == htab->dynsbss)
6432 {
6433 /* Strip these too. */
6434 }
6435 else if (s == htab->sdata[0].section
6436 || s == htab->sdata[1].section)
6437 {
6438 strip_section = (s->flags & SEC_KEEP) == 0;
6439 }
6440 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6441 ".rela"))
6442 {
6443 if (s->size != 0)
6444 {
6445 /* Remember whether there are any relocation sections. */
6446 relocs = TRUE;
6447
6448 /* We use the reloc_count field as a counter if we need
6449 to copy relocs into the output file. */
6450 s->reloc_count = 0;
6451 }
6452 }
6453 else
6454 {
6455 /* It's not one of our sections, so don't allocate space. */
6456 continue;
6457 }
6458
6459 if (s->size == 0 && strip_section)
6460 {
6461 /* If we don't need this section, strip it from the
6462 output file. This is mostly to handle .rela.bss and
6463 .rela.plt. We must create both sections in
6464 create_dynamic_sections, because they must be created
6465 before the linker maps input sections to output
6466 sections. The linker does that before
6467 adjust_dynamic_symbol is called, and it is that
6468 function which decides whether anything needs to go
6469 into these sections. */
6470 s->flags |= SEC_EXCLUDE;
6471 continue;
6472 }
6473
6474 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6475 continue;
6476
6477 /* Allocate memory for the section contents. */
6478 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6479 if (s->contents == NULL)
6480 return FALSE;
6481 }
6482
6483 if (htab->elf.dynamic_sections_created)
6484 {
6485 /* Add some entries to the .dynamic section. We fill in the
6486 values later, in ppc_elf_finish_dynamic_sections, but we
6487 must add the entries now so that we get the correct size for
6488 the .dynamic section. The DT_DEBUG entry is filled in by the
6489 dynamic linker and used by the debugger. */
6490 #define add_dynamic_entry(TAG, VAL) \
6491 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6492
6493 if (info->executable)
6494 {
6495 if (!add_dynamic_entry (DT_DEBUG, 0))
6496 return FALSE;
6497 }
6498
6499 if (htab->plt != NULL && htab->plt->size != 0)
6500 {
6501 if (!add_dynamic_entry (DT_PLTGOT, 0)
6502 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6503 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6504 || !add_dynamic_entry (DT_JMPREL, 0))
6505 return FALSE;
6506 }
6507
6508 if (htab->plt_type == PLT_NEW
6509 && htab->glink != NULL
6510 && htab->glink->size != 0)
6511 {
6512 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6513 return FALSE;
6514 if (!htab->params->no_tls_get_addr_opt
6515 && htab->tls_get_addr != NULL
6516 && htab->tls_get_addr->plt.plist != NULL
6517 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6518 return FALSE;
6519 }
6520
6521 if (relocs)
6522 {
6523 if (!add_dynamic_entry (DT_RELA, 0)
6524 || !add_dynamic_entry (DT_RELASZ, 0)
6525 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6526 return FALSE;
6527 }
6528
6529 /* If any dynamic relocs apply to a read-only section, then we
6530 need a DT_TEXTREL entry. */
6531 if ((info->flags & DF_TEXTREL) == 0)
6532 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6533 info);
6534
6535 if ((info->flags & DF_TEXTREL) != 0)
6536 {
6537 if (!add_dynamic_entry (DT_TEXTREL, 0))
6538 return FALSE;
6539 }
6540 if (htab->is_vxworks
6541 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6542 return FALSE;
6543 }
6544 #undef add_dynamic_entry
6545
6546 if (htab->glink_eh_frame != NULL
6547 && htab->glink_eh_frame->contents != NULL)
6548 {
6549 unsigned char *p = htab->glink_eh_frame->contents;
6550 bfd_vma val;
6551
6552 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6553 /* CIE length (rewrite in case little-endian). */
6554 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6555 p += sizeof (glink_eh_frame_cie);
6556 /* FDE length. */
6557 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6558 bfd_put_32 (htab->elf.dynobj, val, p);
6559 p += 4;
6560 /* CIE pointer. */
6561 val = p - htab->glink_eh_frame->contents;
6562 bfd_put_32 (htab->elf.dynobj, val, p);
6563 p += 4;
6564 /* Offset to .glink. Set later. */
6565 p += 4;
6566 /* .glink size. */
6567 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6568 p += 4;
6569 /* Augmentation. */
6570 p += 1;
6571
6572 if (info->shared
6573 && htab->elf.dynamic_sections_created)
6574 {
6575 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6576 if (adv < 64)
6577 *p++ = DW_CFA_advance_loc + adv;
6578 else if (adv < 256)
6579 {
6580 *p++ = DW_CFA_advance_loc1;
6581 *p++ = adv;
6582 }
6583 else if (adv < 65536)
6584 {
6585 *p++ = DW_CFA_advance_loc2;
6586 bfd_put_16 (htab->elf.dynobj, adv, p);
6587 p += 2;
6588 }
6589 else
6590 {
6591 *p++ = DW_CFA_advance_loc4;
6592 bfd_put_32 (htab->elf.dynobj, adv, p);
6593 p += 4;
6594 }
6595 *p++ = DW_CFA_register;
6596 *p++ = 65;
6597 p++;
6598 *p++ = DW_CFA_advance_loc + 4;
6599 *p++ = DW_CFA_restore_extended;
6600 *p++ = 65;
6601 }
6602 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6603 == htab->glink_eh_frame->size);
6604 }
6605
6606 return TRUE;
6607 }
6608
6609 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6610 if it looks like nothing is using them. */
6611
6612 static void
6613 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6614 {
6615 struct elf_link_hash_entry *sda = lsect->sym;
6616
6617 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6618 {
6619 asection *s;
6620
6621 s = bfd_get_section_by_name (output_bfd, lsect->name);
6622 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6623 {
6624 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6625 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6626 {
6627 sda->def_regular = 0;
6628 /* This is somewhat magic. See elf_link_output_extsym. */
6629 sda->ref_dynamic = 1;
6630 sda->forced_local = 0;
6631 }
6632 }
6633 }
6634 }
6635
6636 void
6637 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6638 {
6639 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6640
6641 if (htab != NULL)
6642 {
6643 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6644 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6645 }
6646 }
6647
6648
6649 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6650
6651 static bfd_boolean
6652 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6653 {
6654 if (h->plt.plist != NULL
6655 && !h->def_regular
6656 && (!h->pointer_equality_needed
6657 || !h->ref_regular_nonweak))
6658 return FALSE;
6659
6660 return _bfd_elf_hash_symbol (h);
6661 }
6662 \f
6663 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6664
6665 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6666 used for some functions that are allowed to break the ABI). */
6667 static const int shared_stub_entry[] =
6668 {
6669 0x7c0802a6, /* mflr 0 */
6670 0x429f0005, /* bcl 20, 31, .Lxxx */
6671 0x7d8802a6, /* mflr 12 */
6672 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6673 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6674 0x7c0803a6, /* mtlr 0 */
6675 0x7d8903a6, /* mtctr 12 */
6676 0x4e800420, /* bctr */
6677 };
6678
6679 static const int stub_entry[] =
6680 {
6681 0x3d800000, /* lis 12,xxx@ha */
6682 0x398c0000, /* addi 12,12,xxx@l */
6683 0x7d8903a6, /* mtctr 12 */
6684 0x4e800420, /* bctr */
6685 };
6686
6687 struct ppc_elf_relax_info
6688 {
6689 unsigned int workaround_size;
6690 };
6691
6692 /* This function implements long branch trampolines, and the ppc476
6693 icache bug workaround. Any section needing trampolines or patch
6694 space for the workaround has its size extended so that we can
6695 add trampolines at the end of the section. */
6696
6697 static bfd_boolean
6698 ppc_elf_relax_section (bfd *abfd,
6699 asection *isec,
6700 struct bfd_link_info *link_info,
6701 bfd_boolean *again)
6702 {
6703 struct one_fixup
6704 {
6705 struct one_fixup *next;
6706 asection *tsec;
6707 /* Final link, can use the symbol offset. For a
6708 relocatable link we use the symbol's index. */
6709 bfd_vma toff;
6710 bfd_vma trampoff;
6711 };
6712
6713 Elf_Internal_Shdr *symtab_hdr;
6714 bfd_byte *contents = NULL;
6715 Elf_Internal_Sym *isymbuf = NULL;
6716 Elf_Internal_Rela *internal_relocs = NULL;
6717 Elf_Internal_Rela *irel, *irelend = NULL;
6718 struct one_fixup *fixups = NULL;
6719 struct ppc_elf_relax_info *relax_info = NULL;
6720 unsigned changes = 0;
6721 bfd_boolean workaround_change;
6722 struct ppc_elf_link_hash_table *htab;
6723 bfd_size_type trampbase, trampoff, newsize;
6724 asection *got2;
6725 bfd_boolean maybe_pasted;
6726
6727 *again = FALSE;
6728
6729 /* No need to do anything with non-alloc or non-code sections. */
6730 if ((isec->flags & SEC_ALLOC) == 0
6731 || (isec->flags & SEC_CODE) == 0
6732 || (isec->flags & SEC_LINKER_CREATED) != 0
6733 || isec->size < 4)
6734 return TRUE;
6735
6736 /* We cannot represent the required PIC relocs in the output, so don't
6737 do anything. The linker doesn't support mixing -shared and -r
6738 anyway. */
6739 if (link_info->relocatable && link_info->shared)
6740 return TRUE;
6741
6742 htab = ppc_elf_hash_table (link_info);
6743 if (htab == NULL)
6744 return TRUE;
6745
6746 isec->size = (isec->size + 3) & -4;
6747 if (isec->rawsize == 0)
6748 isec->rawsize = isec->size;
6749 trampbase = isec->size;
6750
6751 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6752 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6753 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6754
6755 if (htab->params->ppc476_workaround)
6756 {
6757 if (elf_section_data (isec)->sec_info == NULL)
6758 {
6759 elf_section_data (isec)->sec_info
6760 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6761 if (elf_section_data (isec)->sec_info == NULL)
6762 return FALSE;
6763 }
6764 relax_info = elf_section_data (isec)->sec_info;
6765 trampbase -= relax_info->workaround_size;
6766 }
6767
6768 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6769 || strcmp (isec->output_section->name, ".fini") == 0);
6770 /* Space for a branch around any trampolines. */
6771 trampoff = trampbase;
6772 if (maybe_pasted && trampbase == isec->rawsize)
6773 trampoff += 4;
6774
6775 symtab_hdr = &elf_symtab_hdr (abfd);
6776
6777 if (htab->params->branch_trampolines)
6778 {
6779 /* Get a copy of the native relocations. */
6780 if (isec->reloc_count != 0)
6781 {
6782 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6783 link_info->keep_memory);
6784 if (internal_relocs == NULL)
6785 goto error_return;
6786 }
6787
6788 got2 = bfd_get_section_by_name (abfd, ".got2");
6789
6790 irelend = internal_relocs + isec->reloc_count;
6791 for (irel = internal_relocs; irel < irelend; irel++)
6792 {
6793 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6794 bfd_vma toff, roff;
6795 asection *tsec;
6796 struct one_fixup *f;
6797 size_t insn_offset = 0;
6798 bfd_vma max_branch_offset, val;
6799 bfd_byte *hit_addr;
6800 unsigned long t0;
6801 struct elf_link_hash_entry *h;
6802 struct plt_entry **plist;
6803 unsigned char sym_type;
6804
6805 switch (r_type)
6806 {
6807 case R_PPC_REL24:
6808 case R_PPC_LOCAL24PC:
6809 case R_PPC_PLTREL24:
6810 max_branch_offset = 1 << 25;
6811 break;
6812
6813 case R_PPC_REL14:
6814 case R_PPC_REL14_BRTAKEN:
6815 case R_PPC_REL14_BRNTAKEN:
6816 max_branch_offset = 1 << 15;
6817 break;
6818
6819 default:
6820 continue;
6821 }
6822
6823 /* Get the value of the symbol referred to by the reloc. */
6824 h = NULL;
6825 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6826 {
6827 /* A local symbol. */
6828 Elf_Internal_Sym *isym;
6829
6830 /* Read this BFD's local symbols. */
6831 if (isymbuf == NULL)
6832 {
6833 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6834 if (isymbuf == NULL)
6835 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6836 symtab_hdr->sh_info, 0,
6837 NULL, NULL, NULL);
6838 if (isymbuf == 0)
6839 goto error_return;
6840 }
6841 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6842 if (isym->st_shndx == SHN_UNDEF)
6843 tsec = bfd_und_section_ptr;
6844 else if (isym->st_shndx == SHN_ABS)
6845 tsec = bfd_abs_section_ptr;
6846 else if (isym->st_shndx == SHN_COMMON)
6847 tsec = bfd_com_section_ptr;
6848 else
6849 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6850
6851 toff = isym->st_value;
6852 sym_type = ELF_ST_TYPE (isym->st_info);
6853 }
6854 else
6855 {
6856 /* Global symbol handling. */
6857 unsigned long indx;
6858
6859 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6860 h = elf_sym_hashes (abfd)[indx];
6861
6862 while (h->root.type == bfd_link_hash_indirect
6863 || h->root.type == bfd_link_hash_warning)
6864 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6865
6866 if (h->root.type == bfd_link_hash_defined
6867 || h->root.type == bfd_link_hash_defweak)
6868 {
6869 tsec = h->root.u.def.section;
6870 toff = h->root.u.def.value;
6871 }
6872 else if (h->root.type == bfd_link_hash_undefined
6873 || h->root.type == bfd_link_hash_undefweak)
6874 {
6875 tsec = bfd_und_section_ptr;
6876 toff = link_info->relocatable ? indx : 0;
6877 }
6878 else
6879 continue;
6880
6881 /* If this branch is to __tls_get_addr then we may later
6882 optimise away the call. We won't be needing a long-
6883 branch stub in that case. */
6884 if (link_info->executable
6885 && !link_info->relocatable
6886 && h == htab->tls_get_addr
6887 && irel != internal_relocs)
6888 {
6889 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6890 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6891 unsigned int tls_mask = 0;
6892
6893 /* The previous reloc should be one of R_PPC_TLSGD or
6894 R_PPC_TLSLD, or for older object files, a reloc
6895 on the __tls_get_addr arg setup insn. Get tls
6896 mask bits from the symbol on that reloc. */
6897 if (t_symndx < symtab_hdr->sh_info)
6898 {
6899 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6900
6901 if (local_got_offsets != NULL)
6902 {
6903 struct plt_entry **local_plt = (struct plt_entry **)
6904 (local_got_offsets + symtab_hdr->sh_info);
6905 char *lgot_masks = (char *)
6906 (local_plt + symtab_hdr->sh_info);
6907 tls_mask = lgot_masks[t_symndx];
6908 }
6909 }
6910 else
6911 {
6912 struct elf_link_hash_entry *th
6913 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6914
6915 while (th->root.type == bfd_link_hash_indirect
6916 || th->root.type == bfd_link_hash_warning)
6917 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6918
6919 tls_mask
6920 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6921 }
6922
6923 /* The mask bits tell us if the call will be
6924 optimised away. */
6925 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6926 && (t_rtype == R_PPC_TLSGD
6927 || t_rtype == R_PPC_GOT_TLSGD16
6928 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6929 continue;
6930 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6931 && (t_rtype == R_PPC_TLSLD
6932 || t_rtype == R_PPC_GOT_TLSLD16
6933 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6934 continue;
6935 }
6936
6937 sym_type = h->type;
6938 }
6939
6940 /* The condition here under which we call find_plt_ent must
6941 match that in relocate_section. If we call find_plt_ent here
6942 but not in relocate_section, or vice versa, then the branch
6943 destination used here may be incorrect. */
6944 plist = NULL;
6945 if (h != NULL)
6946 {
6947 /* We know is_branch_reloc (r_type) is true. */
6948 if (h->type == STT_GNU_IFUNC
6949 || r_type == R_PPC_PLTREL24)
6950 plist = &h->plt.plist;
6951 }
6952 else if (sym_type == STT_GNU_IFUNC
6953 && elf_local_got_offsets (abfd) != NULL)
6954 {
6955 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6956 struct plt_entry **local_plt = (struct plt_entry **)
6957 (local_got_offsets + symtab_hdr->sh_info);
6958 plist = local_plt + ELF32_R_SYM (irel->r_info);
6959 }
6960 if (plist != NULL)
6961 {
6962 bfd_vma addend = 0;
6963 struct plt_entry *ent;
6964
6965 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6966 addend = irel->r_addend;
6967 ent = find_plt_ent (plist, got2, addend);
6968 if (ent != NULL)
6969 {
6970 if (htab->plt_type == PLT_NEW
6971 || h == NULL
6972 || !htab->elf.dynamic_sections_created
6973 || h->dynindx == -1)
6974 {
6975 tsec = htab->glink;
6976 toff = ent->glink_offset;
6977 }
6978 else
6979 {
6980 tsec = htab->plt;
6981 toff = ent->plt.offset;
6982 }
6983 }
6984 }
6985
6986 /* If the branch and target are in the same section, you have
6987 no hope of adding stubs. We'll error out later should the
6988 branch overflow. */
6989 if (tsec == isec)
6990 continue;
6991
6992 /* There probably isn't any reason to handle symbols in
6993 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6994 attribute for a code section, and we are only looking at
6995 branches. However, implement it correctly here as a
6996 reference for other target relax_section functions. */
6997 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6998 {
6999 /* At this stage in linking, no SEC_MERGE symbol has been
7000 adjusted, so all references to such symbols need to be
7001 passed through _bfd_merged_section_offset. (Later, in
7002 relocate_section, all SEC_MERGE symbols *except* for
7003 section symbols have been adjusted.)
7004
7005 gas may reduce relocations against symbols in SEC_MERGE
7006 sections to a relocation against the section symbol when
7007 the original addend was zero. When the reloc is against
7008 a section symbol we should include the addend in the
7009 offset passed to _bfd_merged_section_offset, since the
7010 location of interest is the original symbol. On the
7011 other hand, an access to "sym+addend" where "sym" is not
7012 a section symbol should not include the addend; Such an
7013 access is presumed to be an offset from "sym"; The
7014 location of interest is just "sym". */
7015 if (sym_type == STT_SECTION)
7016 toff += irel->r_addend;
7017
7018 toff
7019 = _bfd_merged_section_offset (abfd, &tsec,
7020 elf_section_data (tsec)->sec_info,
7021 toff);
7022
7023 if (sym_type != STT_SECTION)
7024 toff += irel->r_addend;
7025 }
7026 /* PLTREL24 addends are special. */
7027 else if (r_type != R_PPC_PLTREL24)
7028 toff += irel->r_addend;
7029
7030 /* Attempted -shared link of non-pic code loses. */
7031 if ((!link_info->relocatable
7032 && tsec == bfd_und_section_ptr)
7033 || tsec->output_section == NULL
7034 || (tsec->owner != NULL
7035 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7036 continue;
7037
7038 roff = irel->r_offset;
7039
7040 /* If the branch is in range, no need to do anything. */
7041 if (tsec != bfd_und_section_ptr
7042 && (!link_info->relocatable
7043 /* A relocatable link may have sections moved during
7044 final link, so do not presume they remain in range. */
7045 || tsec->output_section == isec->output_section))
7046 {
7047 bfd_vma symaddr, reladdr;
7048
7049 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7050 reladdr = isec->output_section->vma + isec->output_offset + roff;
7051 if (symaddr - reladdr + max_branch_offset
7052 < 2 * max_branch_offset)
7053 continue;
7054 }
7055
7056 /* Look for an existing fixup to this address. */
7057 for (f = fixups; f ; f = f->next)
7058 if (f->tsec == tsec && f->toff == toff)
7059 break;
7060
7061 if (f == NULL)
7062 {
7063 size_t size;
7064 unsigned long stub_rtype;
7065
7066 val = trampoff - roff;
7067 if (val >= max_branch_offset)
7068 /* Oh dear, we can't reach a trampoline. Don't try to add
7069 one. We'll report an error later. */
7070 continue;
7071
7072 if (link_info->shared)
7073 {
7074 size = 4 * ARRAY_SIZE (shared_stub_entry);
7075 insn_offset = 12;
7076 }
7077 else
7078 {
7079 size = 4 * ARRAY_SIZE (stub_entry);
7080 insn_offset = 0;
7081 }
7082 stub_rtype = R_PPC_RELAX;
7083 if (tsec == htab->plt
7084 || tsec == htab->glink)
7085 {
7086 stub_rtype = R_PPC_RELAX_PLT;
7087 if (r_type == R_PPC_PLTREL24)
7088 stub_rtype = R_PPC_RELAX_PLTREL24;
7089 }
7090
7091 /* Hijack the old relocation. Since we need two
7092 relocations for this use a "composite" reloc. */
7093 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7094 stub_rtype);
7095 irel->r_offset = trampoff + insn_offset;
7096 if (r_type == R_PPC_PLTREL24
7097 && stub_rtype != R_PPC_RELAX_PLTREL24)
7098 irel->r_addend = 0;
7099
7100 /* Record the fixup so we don't do it again this section. */
7101 f = bfd_malloc (sizeof (*f));
7102 f->next = fixups;
7103 f->tsec = tsec;
7104 f->toff = toff;
7105 f->trampoff = trampoff;
7106 fixups = f;
7107
7108 trampoff += size;
7109 changes++;
7110 }
7111 else
7112 {
7113 val = f->trampoff - roff;
7114 if (val >= max_branch_offset)
7115 continue;
7116
7117 /* Nop out the reloc, since we're finalizing things here. */
7118 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7119 }
7120
7121 /* Get the section contents. */
7122 if (contents == NULL)
7123 {
7124 /* Get cached copy if it exists. */
7125 if (elf_section_data (isec)->this_hdr.contents != NULL)
7126 contents = elf_section_data (isec)->this_hdr.contents;
7127 /* Go get them off disk. */
7128 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7129 goto error_return;
7130 }
7131
7132 /* Fix up the existing branch to hit the trampoline. */
7133 hit_addr = contents + roff;
7134 switch (r_type)
7135 {
7136 case R_PPC_REL24:
7137 case R_PPC_LOCAL24PC:
7138 case R_PPC_PLTREL24:
7139 t0 = bfd_get_32 (abfd, hit_addr);
7140 t0 &= ~0x3fffffc;
7141 t0 |= val & 0x3fffffc;
7142 bfd_put_32 (abfd, t0, hit_addr);
7143 break;
7144
7145 case R_PPC_REL14:
7146 case R_PPC_REL14_BRTAKEN:
7147 case R_PPC_REL14_BRNTAKEN:
7148 t0 = bfd_get_32 (abfd, hit_addr);
7149 t0 &= ~0xfffc;
7150 t0 |= val & 0xfffc;
7151 bfd_put_32 (abfd, t0, hit_addr);
7152 break;
7153 }
7154 }
7155
7156 while (fixups != NULL)
7157 {
7158 struct one_fixup *f = fixups;
7159 fixups = fixups->next;
7160 free (f);
7161 }
7162 }
7163
7164 workaround_change = FALSE;
7165 newsize = trampoff;
7166 if (htab->params->ppc476_workaround
7167 && (!link_info->relocatable
7168 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7169 {
7170 bfd_vma addr, end_addr;
7171 unsigned int crossings;
7172 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7173
7174 addr = isec->output_section->vma + isec->output_offset;
7175 end_addr = addr + trampoff;
7176 addr &= -pagesize;
7177 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7178 if (crossings != 0)
7179 {
7180 /* Keep space aligned, to ensure the patch code itself does
7181 not cross a page. Don't decrease size calculated on a
7182 previous pass as otherwise we might never settle on a layout. */
7183 newsize = 15 - ((end_addr - 1) & 15);
7184 newsize += crossings * 16;
7185 if (relax_info->workaround_size < newsize)
7186 {
7187 relax_info->workaround_size = newsize;
7188 workaround_change = TRUE;
7189 }
7190 /* Ensure relocate_section is called. */
7191 isec->flags |= SEC_RELOC;
7192 }
7193 newsize = trampoff + relax_info->workaround_size;
7194 }
7195
7196 if (changes || workaround_change)
7197 isec->size = newsize;
7198
7199 if (isymbuf != NULL
7200 && symtab_hdr->contents != (unsigned char *) isymbuf)
7201 {
7202 if (! link_info->keep_memory)
7203 free (isymbuf);
7204 else
7205 {
7206 /* Cache the symbols for elf_link_input_bfd. */
7207 symtab_hdr->contents = (unsigned char *) isymbuf;
7208 }
7209 }
7210
7211 if (contents != NULL
7212 && elf_section_data (isec)->this_hdr.contents != contents)
7213 {
7214 if (!changes && !link_info->keep_memory)
7215 free (contents);
7216 else
7217 {
7218 /* Cache the section contents for elf_link_input_bfd. */
7219 elf_section_data (isec)->this_hdr.contents = contents;
7220 }
7221 }
7222
7223 if (changes != 0)
7224 {
7225 /* Append sufficient NOP relocs so we can write out relocation
7226 information for the trampolines. */
7227 Elf_Internal_Shdr *rel_hdr;
7228 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7229 * sizeof (*new_relocs));
7230 unsigned ix;
7231
7232 if (!new_relocs)
7233 goto error_return;
7234 memcpy (new_relocs, internal_relocs,
7235 isec->reloc_count * sizeof (*new_relocs));
7236 for (ix = changes; ix--;)
7237 {
7238 irel = new_relocs + ix + isec->reloc_count;
7239
7240 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7241 }
7242 if (internal_relocs != elf_section_data (isec)->relocs)
7243 free (internal_relocs);
7244 elf_section_data (isec)->relocs = new_relocs;
7245 isec->reloc_count += changes;
7246 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7247 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7248 }
7249 else if (internal_relocs != NULL
7250 && elf_section_data (isec)->relocs != internal_relocs)
7251 free (internal_relocs);
7252
7253 *again = changes != 0 || workaround_change;
7254 return TRUE;
7255
7256 error_return:
7257 while (fixups != NULL)
7258 {
7259 struct one_fixup *f = fixups;
7260 fixups = fixups->next;
7261 free (f);
7262 }
7263 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7264 free (isymbuf);
7265 if (contents != NULL
7266 && elf_section_data (isec)->this_hdr.contents != contents)
7267 free (contents);
7268 if (internal_relocs != NULL
7269 && elf_section_data (isec)->relocs != internal_relocs)
7270 free (internal_relocs);
7271 return FALSE;
7272 }
7273 \f
7274 /* What to do when ld finds relocations against symbols defined in
7275 discarded sections. */
7276
7277 static unsigned int
7278 ppc_elf_action_discarded (asection *sec)
7279 {
7280 if (strcmp (".fixup", sec->name) == 0)
7281 return 0;
7282
7283 if (strcmp (".got2", sec->name) == 0)
7284 return 0;
7285
7286 return _bfd_elf_default_action_discarded (sec);
7287 }
7288 \f
7289 /* Fill in the address for a pointer generated in a linker section. */
7290
7291 static bfd_vma
7292 elf_finish_pointer_linker_section (bfd *input_bfd,
7293 elf_linker_section_t *lsect,
7294 struct elf_link_hash_entry *h,
7295 bfd_vma relocation,
7296 const Elf_Internal_Rela *rel)
7297 {
7298 elf_linker_section_pointers_t *linker_section_ptr;
7299
7300 BFD_ASSERT (lsect != NULL);
7301
7302 if (h != NULL)
7303 {
7304 /* Handle global symbol. */
7305 struct ppc_elf_link_hash_entry *eh;
7306
7307 eh = (struct ppc_elf_link_hash_entry *) h;
7308 BFD_ASSERT (eh->elf.def_regular);
7309 linker_section_ptr = eh->linker_section_pointer;
7310 }
7311 else
7312 {
7313 /* Handle local symbol. */
7314 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7315
7316 BFD_ASSERT (is_ppc_elf (input_bfd));
7317 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7318 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7319 }
7320
7321 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7322 rel->r_addend,
7323 lsect);
7324 BFD_ASSERT (linker_section_ptr != NULL);
7325
7326 /* Offset will always be a multiple of four, so use the bottom bit
7327 as a "written" flag. */
7328 if ((linker_section_ptr->offset & 1) == 0)
7329 {
7330 bfd_put_32 (lsect->section->owner,
7331 relocation + linker_section_ptr->addend,
7332 lsect->section->contents + linker_section_ptr->offset);
7333 linker_section_ptr->offset += 1;
7334 }
7335
7336 relocation = (lsect->section->output_section->vma
7337 + lsect->section->output_offset
7338 + linker_section_ptr->offset - 1
7339 - SYM_VAL (lsect->sym));
7340
7341 #ifdef DEBUG
7342 fprintf (stderr,
7343 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7344 lsect->name, (long) relocation, (long) relocation);
7345 #endif
7346
7347 return relocation;
7348 }
7349
7350 #define PPC_LO(v) ((v) & 0xffff)
7351 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7352 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7353
7354 static void
7355 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7356 struct bfd_link_info *info)
7357 {
7358 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7359 bfd *output_bfd = info->output_bfd;
7360 bfd_vma plt;
7361
7362 plt = ((ent->plt.offset & ~1)
7363 + plt_sec->output_section->vma
7364 + plt_sec->output_offset);
7365
7366 if (info->shared)
7367 {
7368 bfd_vma got = 0;
7369
7370 if (ent->addend >= 32768)
7371 got = (ent->addend
7372 + ent->sec->output_section->vma
7373 + ent->sec->output_offset);
7374 else if (htab->elf.hgot != NULL)
7375 got = SYM_VAL (htab->elf.hgot);
7376
7377 plt -= got;
7378
7379 if (plt + 0x8000 < 0x10000)
7380 {
7381 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7382 p += 4;
7383 bfd_put_32 (output_bfd, MTCTR_11, p);
7384 p += 4;
7385 bfd_put_32 (output_bfd, BCTR, p);
7386 p += 4;
7387 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7388 p += 4;
7389 }
7390 else
7391 {
7392 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7393 p += 4;
7394 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7395 p += 4;
7396 bfd_put_32 (output_bfd, MTCTR_11, p);
7397 p += 4;
7398 bfd_put_32 (output_bfd, BCTR, p);
7399 p += 4;
7400 }
7401 }
7402 else
7403 {
7404 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7405 p += 4;
7406 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7407 p += 4;
7408 bfd_put_32 (output_bfd, MTCTR_11, p);
7409 p += 4;
7410 bfd_put_32 (output_bfd, BCTR, p);
7411 p += 4;
7412 }
7413 }
7414
7415 /* Return true if symbol is defined statically. */
7416
7417 static bfd_boolean
7418 is_static_defined (struct elf_link_hash_entry *h)
7419 {
7420 return ((h->root.type == bfd_link_hash_defined
7421 || h->root.type == bfd_link_hash_defweak)
7422 && h->root.u.def.section != NULL
7423 && h->root.u.def.section->output_section != NULL);
7424 }
7425
7426 /* If INSN is an opcode that may be used with an @tls operand, return
7427 the transformed insn for TLS optimisation, otherwise return 0. If
7428 REG is non-zero only match an insn with RB or RA equal to REG. */
7429
7430 unsigned int
7431 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7432 {
7433 unsigned int rtra;
7434
7435 if ((insn & (0x3f << 26)) != 31 << 26)
7436 return 0;
7437
7438 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7439 rtra = insn & ((1 << 26) - (1 << 16));
7440 else if (((insn >> 16) & 0x1f) == reg)
7441 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7442 else
7443 return 0;
7444
7445 if ((insn & (0x3ff << 1)) == 266 << 1)
7446 /* add -> addi. */
7447 insn = 14 << 26;
7448 else if ((insn & (0x1f << 1)) == 23 << 1
7449 && ((insn & (0x1f << 6)) < 14 << 6
7450 || ((insn & (0x1f << 6)) >= 16 << 6
7451 && (insn & (0x1f << 6)) < 24 << 6)))
7452 /* load and store indexed -> dform. */
7453 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7454 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7455 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7456 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7457 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7458 /* lwax -> lwa. */
7459 insn = (58 << 26) | 2;
7460 else
7461 return 0;
7462 insn |= rtra;
7463 return insn;
7464 }
7465
7466 /* If INSN is an opcode that may be used with an @tprel operand, return
7467 the transformed insn for an undefined weak symbol, ie. with the
7468 thread pointer REG operand removed. Otherwise return 0. */
7469
7470 unsigned int
7471 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7472 {
7473 if ((insn & (0x1f << 16)) == reg << 16
7474 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7475 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7476 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7477 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7478 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7479 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7480 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7481 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7482 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7483 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7484 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7485 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7486 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7487 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7488 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7489 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7490 && (insn & 3) != 1)
7491 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7492 && ((insn & 3) == 0 || (insn & 3) == 3))))
7493 {
7494 insn &= ~(0x1f << 16);
7495 }
7496 else if ((insn & (0x1f << 21)) == reg << 21
7497 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7498 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7499 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7500 {
7501 insn &= ~(0x1f << 21);
7502 insn |= (insn & (0x1f << 16)) << 5;
7503 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7504 insn -= 2 >> 26; /* convert to ori,oris */
7505 }
7506 else
7507 insn = 0;
7508 return insn;
7509 }
7510
7511 static bfd_boolean
7512 is_insn_ds_form (unsigned int insn)
7513 {
7514 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7515 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7516 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7517 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7518 }
7519
7520 static bfd_boolean
7521 is_insn_dq_form (unsigned int insn)
7522 {
7523 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7524 }
7525
7526 /* The RELOCATE_SECTION function is called by the ELF backend linker
7527 to handle the relocations for a section.
7528
7529 The relocs are always passed as Rela structures; if the section
7530 actually uses Rel structures, the r_addend field will always be
7531 zero.
7532
7533 This function is responsible for adjust the section contents as
7534 necessary, and (if using Rela relocs and generating a
7535 relocatable output file) adjusting the reloc addend as
7536 necessary.
7537
7538 This function does not have to worry about setting the reloc
7539 address or the reloc symbol index.
7540
7541 LOCAL_SYMS is a pointer to the swapped in local symbols.
7542
7543 LOCAL_SECTIONS is an array giving the section in the input file
7544 corresponding to the st_shndx field of each local symbol.
7545
7546 The global hash table entry for the global symbols can be found
7547 via elf_sym_hashes (input_bfd).
7548
7549 When generating relocatable output, this function must handle
7550 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7551 going to be the section symbol corresponding to the output
7552 section, which means that the addend must be adjusted
7553 accordingly. */
7554
7555 static bfd_boolean
7556 ppc_elf_relocate_section (bfd *output_bfd,
7557 struct bfd_link_info *info,
7558 bfd *input_bfd,
7559 asection *input_section,
7560 bfd_byte *contents,
7561 Elf_Internal_Rela *relocs,
7562 Elf_Internal_Sym *local_syms,
7563 asection **local_sections)
7564 {
7565 Elf_Internal_Shdr *symtab_hdr;
7566 struct elf_link_hash_entry **sym_hashes;
7567 struct ppc_elf_link_hash_table *htab;
7568 Elf_Internal_Rela *rel;
7569 Elf_Internal_Rela *relend;
7570 Elf_Internal_Rela outrel;
7571 asection *got2;
7572 bfd_vma *local_got_offsets;
7573 bfd_boolean ret = TRUE;
7574 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7575 bfd_boolean is_vxworks_tls;
7576
7577 #ifdef DEBUG
7578 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7579 "%ld relocations%s",
7580 input_bfd, input_section,
7581 (long) input_section->reloc_count,
7582 (info->relocatable) ? " (relocatable)" : "");
7583 #endif
7584
7585 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7586
7587 /* Initialize howto table if not already done. */
7588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7589 ppc_elf_howto_init ();
7590
7591 htab = ppc_elf_hash_table (info);
7592 local_got_offsets = elf_local_got_offsets (input_bfd);
7593 symtab_hdr = &elf_symtab_hdr (input_bfd);
7594 sym_hashes = elf_sym_hashes (input_bfd);
7595 /* We have to handle relocations in vxworks .tls_vars sections
7596 specially, because the dynamic loader is 'weird'. */
7597 is_vxworks_tls = (htab->is_vxworks && info->shared
7598 && !strcmp (input_section->output_section->name,
7599 ".tls_vars"));
7600 rel = relocs;
7601 relend = relocs + input_section->reloc_count;
7602 for (; rel < relend; rel++)
7603 {
7604 enum elf_ppc_reloc_type r_type;
7605 bfd_vma addend;
7606 bfd_reloc_status_type r;
7607 Elf_Internal_Sym *sym;
7608 asection *sec;
7609 struct elf_link_hash_entry *h;
7610 const char *sym_name;
7611 reloc_howto_type *howto;
7612 unsigned long r_symndx;
7613 bfd_vma relocation;
7614 bfd_vma branch_bit, from;
7615 bfd_boolean unresolved_reloc;
7616 bfd_boolean warned;
7617 unsigned int tls_type, tls_mask, tls_gd;
7618 struct plt_entry **ifunc;
7619 struct reloc_howto_struct alt_howto;
7620
7621 r_type = ELF32_R_TYPE (rel->r_info);
7622 sym = NULL;
7623 sec = NULL;
7624 h = NULL;
7625 unresolved_reloc = FALSE;
7626 warned = FALSE;
7627 r_symndx = ELF32_R_SYM (rel->r_info);
7628
7629 if (r_symndx < symtab_hdr->sh_info)
7630 {
7631 sym = local_syms + r_symndx;
7632 sec = local_sections[r_symndx];
7633 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7634
7635 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7636 }
7637 else
7638 {
7639 bfd_boolean ignored;
7640
7641 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7642 r_symndx, symtab_hdr, sym_hashes,
7643 h, sec, relocation,
7644 unresolved_reloc, warned, ignored);
7645
7646 sym_name = h->root.root.string;
7647 }
7648
7649 if (sec != NULL && discarded_section (sec))
7650 {
7651 /* For relocs against symbols from removed linkonce sections,
7652 or sections discarded by a linker script, we just want the
7653 section contents zeroed. Avoid any special processing. */
7654 howto = NULL;
7655 if (r_type < R_PPC_max)
7656 howto = ppc_elf_howto_table[r_type];
7657 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7658 rel, 1, relend, howto, 0, contents);
7659 }
7660
7661 if (info->relocatable)
7662 {
7663 if (got2 != NULL
7664 && r_type == R_PPC_PLTREL24
7665 && rel->r_addend != 0)
7666 {
7667 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7668 addend specifies the GOT pointer offset within .got2. */
7669 rel->r_addend += got2->output_offset;
7670 }
7671 if (r_type != R_PPC_RELAX_PLT
7672 && r_type != R_PPC_RELAX_PLTREL24
7673 && r_type != R_PPC_RELAX)
7674 continue;
7675 }
7676
7677 /* TLS optimizations. Replace instruction sequences and relocs
7678 based on information we collected in tls_optimize. We edit
7679 RELOCS so that --emit-relocs will output something sensible
7680 for the final instruction stream. */
7681 tls_mask = 0;
7682 tls_gd = 0;
7683 if (h != NULL)
7684 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7685 else if (local_got_offsets != NULL)
7686 {
7687 struct plt_entry **local_plt;
7688 char *lgot_masks;
7689 local_plt
7690 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7691 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7692 tls_mask = lgot_masks[r_symndx];
7693 }
7694
7695 /* Ensure reloc mapping code below stays sane. */
7696 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7697 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7698 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7699 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7700 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7701 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7702 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7703 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7704 abort ();
7705 switch (r_type)
7706 {
7707 default:
7708 break;
7709
7710 case R_PPC_GOT_TPREL16:
7711 case R_PPC_GOT_TPREL16_LO:
7712 if ((tls_mask & TLS_TLS) != 0
7713 && (tls_mask & TLS_TPREL) == 0)
7714 {
7715 bfd_vma insn;
7716
7717 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7718 insn &= 31 << 21;
7719 insn |= 0x3c020000; /* addis 0,2,0 */
7720 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7721 r_type = R_PPC_TPREL16_HA;
7722 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7723 }
7724 break;
7725
7726 case R_PPC_TLS:
7727 if ((tls_mask & TLS_TLS) != 0
7728 && (tls_mask & TLS_TPREL) == 0)
7729 {
7730 bfd_vma insn;
7731
7732 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7733 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7734 if (insn == 0)
7735 abort ();
7736 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7737 r_type = R_PPC_TPREL16_LO;
7738 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7739
7740 /* Was PPC_TLS which sits on insn boundary, now
7741 PPC_TPREL16_LO which is at low-order half-word. */
7742 rel->r_offset += d_offset;
7743 }
7744 break;
7745
7746 case R_PPC_GOT_TLSGD16_HI:
7747 case R_PPC_GOT_TLSGD16_HA:
7748 tls_gd = TLS_TPRELGD;
7749 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7750 goto tls_gdld_hi;
7751 break;
7752
7753 case R_PPC_GOT_TLSLD16_HI:
7754 case R_PPC_GOT_TLSLD16_HA:
7755 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7756 {
7757 tls_gdld_hi:
7758 if ((tls_mask & tls_gd) != 0)
7759 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7760 + R_PPC_GOT_TPREL16);
7761 else
7762 {
7763 rel->r_offset -= d_offset;
7764 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7765 r_type = R_PPC_NONE;
7766 }
7767 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7768 }
7769 break;
7770
7771 case R_PPC_GOT_TLSGD16:
7772 case R_PPC_GOT_TLSGD16_LO:
7773 tls_gd = TLS_TPRELGD;
7774 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7775 goto tls_ldgd_opt;
7776 break;
7777
7778 case R_PPC_GOT_TLSLD16:
7779 case R_PPC_GOT_TLSLD16_LO:
7780 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7781 {
7782 unsigned int insn1, insn2;
7783 bfd_vma offset;
7784
7785 tls_ldgd_opt:
7786 offset = (bfd_vma) -1;
7787 /* If not using the newer R_PPC_TLSGD/LD to mark
7788 __tls_get_addr calls, we must trust that the call
7789 stays with its arg setup insns, ie. that the next
7790 reloc is the __tls_get_addr call associated with
7791 the current reloc. Edit both insns. */
7792 if (input_section->has_tls_get_addr_call
7793 && rel + 1 < relend
7794 && branch_reloc_hash_match (input_bfd, rel + 1,
7795 htab->tls_get_addr))
7796 offset = rel[1].r_offset;
7797 /* We read the low GOT_TLS insn because we need to keep
7798 the destination reg. It may be something other than
7799 the usual r3, and moved to r3 before the call by
7800 intervening code. */
7801 insn1 = bfd_get_32 (output_bfd,
7802 contents + rel->r_offset - d_offset);
7803 if ((tls_mask & tls_gd) != 0)
7804 {
7805 /* IE */
7806 insn1 &= (0x1f << 21) | (0x1f << 16);
7807 insn1 |= 32 << 26; /* lwz */
7808 if (offset != (bfd_vma) -1)
7809 {
7810 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7811 insn2 = 0x7c631214; /* add 3,3,2 */
7812 bfd_put_32 (output_bfd, insn2, contents + offset);
7813 }
7814 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7815 + R_PPC_GOT_TPREL16);
7816 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7817 }
7818 else
7819 {
7820 /* LE */
7821 insn1 &= 0x1f << 21;
7822 insn1 |= 0x3c020000; /* addis r,2,0 */
7823 if (tls_gd == 0)
7824 {
7825 /* Was an LD reloc. */
7826 for (r_symndx = 0;
7827 r_symndx < symtab_hdr->sh_info;
7828 r_symndx++)
7829 if (local_sections[r_symndx] == sec)
7830 break;
7831 if (r_symndx >= symtab_hdr->sh_info)
7832 r_symndx = STN_UNDEF;
7833 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7834 if (r_symndx != STN_UNDEF)
7835 rel->r_addend -= (local_syms[r_symndx].st_value
7836 + sec->output_offset
7837 + sec->output_section->vma);
7838 }
7839 r_type = R_PPC_TPREL16_HA;
7840 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7841 if (offset != (bfd_vma) -1)
7842 {
7843 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7844 rel[1].r_offset = offset + d_offset;
7845 rel[1].r_addend = rel->r_addend;
7846 insn2 = 0x38630000; /* addi 3,3,0 */
7847 bfd_put_32 (output_bfd, insn2, contents + offset);
7848 }
7849 }
7850 bfd_put_32 (output_bfd, insn1,
7851 contents + rel->r_offset - d_offset);
7852 if (tls_gd == 0)
7853 {
7854 /* We changed the symbol on an LD reloc. Start over
7855 in order to get h, sym, sec etc. right. */
7856 rel--;
7857 continue;
7858 }
7859 }
7860 break;
7861
7862 case R_PPC_TLSGD:
7863 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7864 {
7865 unsigned int insn2;
7866 bfd_vma offset = rel->r_offset;
7867
7868 if ((tls_mask & TLS_TPRELGD) != 0)
7869 {
7870 /* IE */
7871 r_type = R_PPC_NONE;
7872 insn2 = 0x7c631214; /* add 3,3,2 */
7873 }
7874 else
7875 {
7876 /* LE */
7877 r_type = R_PPC_TPREL16_LO;
7878 rel->r_offset += d_offset;
7879 insn2 = 0x38630000; /* addi 3,3,0 */
7880 }
7881 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7882 bfd_put_32 (output_bfd, insn2, contents + offset);
7883 /* Zap the reloc on the _tls_get_addr call too. */
7884 BFD_ASSERT (offset == rel[1].r_offset);
7885 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7886 }
7887 break;
7888
7889 case R_PPC_TLSLD:
7890 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7891 {
7892 unsigned int insn2;
7893
7894 for (r_symndx = 0;
7895 r_symndx < symtab_hdr->sh_info;
7896 r_symndx++)
7897 if (local_sections[r_symndx] == sec)
7898 break;
7899 if (r_symndx >= symtab_hdr->sh_info)
7900 r_symndx = STN_UNDEF;
7901 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7902 if (r_symndx != STN_UNDEF)
7903 rel->r_addend -= (local_syms[r_symndx].st_value
7904 + sec->output_offset
7905 + sec->output_section->vma);
7906
7907 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7908 rel->r_offset += d_offset;
7909 insn2 = 0x38630000; /* addi 3,3,0 */
7910 bfd_put_32 (output_bfd, insn2,
7911 contents + rel->r_offset - d_offset);
7912 /* Zap the reloc on the _tls_get_addr call too. */
7913 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7914 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7915 rel--;
7916 continue;
7917 }
7918 break;
7919 }
7920
7921 /* Handle other relocations that tweak non-addend part of insn. */
7922 branch_bit = 0;
7923 switch (r_type)
7924 {
7925 default:
7926 break;
7927
7928 /* Branch taken prediction relocations. */
7929 case R_PPC_ADDR14_BRTAKEN:
7930 case R_PPC_REL14_BRTAKEN:
7931 branch_bit = BRANCH_PREDICT_BIT;
7932 /* Fall thru */
7933
7934 /* Branch not taken prediction relocations. */
7935 case R_PPC_ADDR14_BRNTAKEN:
7936 case R_PPC_REL14_BRNTAKEN:
7937 {
7938 bfd_vma insn;
7939
7940 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7941 insn &= ~BRANCH_PREDICT_BIT;
7942 insn |= branch_bit;
7943
7944 from = (rel->r_offset
7945 + input_section->output_offset
7946 + input_section->output_section->vma);
7947
7948 /* Invert 'y' bit if not the default. */
7949 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7950 insn ^= BRANCH_PREDICT_BIT;
7951
7952 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7953 break;
7954 }
7955 }
7956
7957 ifunc = NULL;
7958 if (!htab->is_vxworks)
7959 {
7960 struct plt_entry *ent;
7961
7962 if (h != NULL)
7963 {
7964 if (h->type == STT_GNU_IFUNC)
7965 ifunc = &h->plt.plist;
7966 }
7967 else if (local_got_offsets != NULL
7968 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7969 {
7970 struct plt_entry **local_plt;
7971
7972 local_plt = (struct plt_entry **) (local_got_offsets
7973 + symtab_hdr->sh_info);
7974 ifunc = local_plt + r_symndx;
7975 }
7976
7977 ent = NULL;
7978 if (ifunc != NULL
7979 && (!info->shared
7980 || is_branch_reloc (r_type)))
7981 {
7982 addend = 0;
7983 if (r_type == R_PPC_PLTREL24 && info->shared)
7984 addend = rel->r_addend;
7985 ent = find_plt_ent (ifunc, got2, addend);
7986 }
7987 if (ent != NULL)
7988 {
7989 if (h == NULL && (ent->plt.offset & 1) == 0)
7990 {
7991 Elf_Internal_Rela rela;
7992 bfd_byte *loc;
7993
7994 rela.r_offset = (htab->iplt->output_section->vma
7995 + htab->iplt->output_offset
7996 + ent->plt.offset);
7997 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7998 rela.r_addend = relocation;
7999 loc = htab->reliplt->contents;
8000 loc += (htab->reliplt->reloc_count++
8001 * sizeof (Elf32_External_Rela));
8002 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8003
8004 ent->plt.offset |= 1;
8005 }
8006 if (h == NULL && (ent->glink_offset & 1) == 0)
8007 {
8008 unsigned char *p = ((unsigned char *) htab->glink->contents
8009 + ent->glink_offset);
8010 write_glink_stub (ent, htab->iplt, p, info);
8011 ent->glink_offset |= 1;
8012 }
8013
8014 unresolved_reloc = FALSE;
8015 if (htab->plt_type == PLT_NEW
8016 || !htab->elf.dynamic_sections_created
8017 || h == NULL
8018 || h->dynindx == -1)
8019 relocation = (htab->glink->output_section->vma
8020 + htab->glink->output_offset
8021 + (ent->glink_offset & ~1));
8022 else
8023 relocation = (htab->plt->output_section->vma
8024 + htab->plt->output_offset
8025 + ent->plt.offset);
8026 }
8027 }
8028
8029 addend = rel->r_addend;
8030 tls_type = 0;
8031 howto = NULL;
8032 if (r_type < R_PPC_max)
8033 howto = ppc_elf_howto_table[r_type];
8034 switch (r_type)
8035 {
8036 default:
8037 info->callbacks->einfo
8038 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8039 input_bfd, (int) r_type, sym_name);
8040
8041 bfd_set_error (bfd_error_bad_value);
8042 ret = FALSE;
8043 continue;
8044
8045 case R_PPC_NONE:
8046 case R_PPC_TLS:
8047 case R_PPC_TLSGD:
8048 case R_PPC_TLSLD:
8049 case R_PPC_EMB_MRKREF:
8050 case R_PPC_GNU_VTINHERIT:
8051 case R_PPC_GNU_VTENTRY:
8052 continue;
8053
8054 /* GOT16 relocations. Like an ADDR16 using the symbol's
8055 address in the GOT as relocation value instead of the
8056 symbol's value itself. Also, create a GOT entry for the
8057 symbol and put the symbol value there. */
8058 case R_PPC_GOT_TLSGD16:
8059 case R_PPC_GOT_TLSGD16_LO:
8060 case R_PPC_GOT_TLSGD16_HI:
8061 case R_PPC_GOT_TLSGD16_HA:
8062 tls_type = TLS_TLS | TLS_GD;
8063 goto dogot;
8064
8065 case R_PPC_GOT_TLSLD16:
8066 case R_PPC_GOT_TLSLD16_LO:
8067 case R_PPC_GOT_TLSLD16_HI:
8068 case R_PPC_GOT_TLSLD16_HA:
8069 tls_type = TLS_TLS | TLS_LD;
8070 goto dogot;
8071
8072 case R_PPC_GOT_TPREL16:
8073 case R_PPC_GOT_TPREL16_LO:
8074 case R_PPC_GOT_TPREL16_HI:
8075 case R_PPC_GOT_TPREL16_HA:
8076 tls_type = TLS_TLS | TLS_TPREL;
8077 goto dogot;
8078
8079 case R_PPC_GOT_DTPREL16:
8080 case R_PPC_GOT_DTPREL16_LO:
8081 case R_PPC_GOT_DTPREL16_HI:
8082 case R_PPC_GOT_DTPREL16_HA:
8083 tls_type = TLS_TLS | TLS_DTPREL;
8084 goto dogot;
8085
8086 case R_PPC_GOT16:
8087 case R_PPC_GOT16_LO:
8088 case R_PPC_GOT16_HI:
8089 case R_PPC_GOT16_HA:
8090 tls_mask = 0;
8091 dogot:
8092 {
8093 /* Relocation is to the entry for this symbol in the global
8094 offset table. */
8095 bfd_vma off;
8096 bfd_vma *offp;
8097 unsigned long indx;
8098
8099 if (htab->got == NULL)
8100 abort ();
8101
8102 indx = 0;
8103 if (tls_type == (TLS_TLS | TLS_LD)
8104 && (h == NULL
8105 || !h->def_dynamic))
8106 offp = &htab->tlsld_got.offset;
8107 else if (h != NULL)
8108 {
8109 bfd_boolean dyn;
8110 dyn = htab->elf.dynamic_sections_created;
8111 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8112 || (info->shared
8113 && SYMBOL_REFERENCES_LOCAL (info, h)))
8114 /* This is actually a static link, or it is a
8115 -Bsymbolic link and the symbol is defined
8116 locally, or the symbol was forced to be local
8117 because of a version file. */
8118 ;
8119 else
8120 {
8121 BFD_ASSERT (h->dynindx != -1);
8122 indx = h->dynindx;
8123 unresolved_reloc = FALSE;
8124 }
8125 offp = &h->got.offset;
8126 }
8127 else
8128 {
8129 if (local_got_offsets == NULL)
8130 abort ();
8131 offp = &local_got_offsets[r_symndx];
8132 }
8133
8134 /* The offset must always be a multiple of 4. We use the
8135 least significant bit to record whether we have already
8136 processed this entry. */
8137 off = *offp;
8138 if ((off & 1) != 0)
8139 off &= ~1;
8140 else
8141 {
8142 unsigned int tls_m = (tls_mask
8143 & (TLS_LD | TLS_GD | TLS_DTPREL
8144 | TLS_TPREL | TLS_TPRELGD));
8145
8146 if (offp == &htab->tlsld_got.offset)
8147 tls_m = TLS_LD;
8148 else if (h == NULL
8149 || !h->def_dynamic)
8150 tls_m &= ~TLS_LD;
8151
8152 /* We might have multiple got entries for this sym.
8153 Initialize them all. */
8154 do
8155 {
8156 int tls_ty = 0;
8157
8158 if ((tls_m & TLS_LD) != 0)
8159 {
8160 tls_ty = TLS_TLS | TLS_LD;
8161 tls_m &= ~TLS_LD;
8162 }
8163 else if ((tls_m & TLS_GD) != 0)
8164 {
8165 tls_ty = TLS_TLS | TLS_GD;
8166 tls_m &= ~TLS_GD;
8167 }
8168 else if ((tls_m & TLS_DTPREL) != 0)
8169 {
8170 tls_ty = TLS_TLS | TLS_DTPREL;
8171 tls_m &= ~TLS_DTPREL;
8172 }
8173 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8174 {
8175 tls_ty = TLS_TLS | TLS_TPREL;
8176 tls_m = 0;
8177 }
8178
8179 /* Generate relocs for the dynamic linker. */
8180 if ((info->shared || indx != 0)
8181 && (offp == &htab->tlsld_got.offset
8182 || h == NULL
8183 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8184 || h->root.type != bfd_link_hash_undefweak))
8185 {
8186 asection *rsec = htab->relgot;
8187 bfd_byte * loc;
8188
8189 if (ifunc != NULL)
8190 rsec = htab->reliplt;
8191 outrel.r_offset = (htab->got->output_section->vma
8192 + htab->got->output_offset
8193 + off);
8194 outrel.r_addend = 0;
8195 if (tls_ty & (TLS_LD | TLS_GD))
8196 {
8197 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8198 if (tls_ty == (TLS_TLS | TLS_GD))
8199 {
8200 loc = rsec->contents;
8201 loc += (rsec->reloc_count++
8202 * sizeof (Elf32_External_Rela));
8203 bfd_elf32_swap_reloca_out (output_bfd,
8204 &outrel, loc);
8205 outrel.r_offset += 4;
8206 outrel.r_info
8207 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8208 }
8209 }
8210 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8211 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8212 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8213 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8214 else if (indx != 0)
8215 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8216 else if (ifunc != NULL)
8217 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8218 else
8219 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8220 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8221 {
8222 outrel.r_addend += relocation;
8223 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8224 {
8225 if (htab->elf.tls_sec == NULL)
8226 outrel.r_addend = 0;
8227 else
8228 outrel.r_addend -= htab->elf.tls_sec->vma;
8229 }
8230 }
8231 loc = rsec->contents;
8232 loc += (rsec->reloc_count++
8233 * sizeof (Elf32_External_Rela));
8234 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8235 }
8236
8237 /* Init the .got section contents if we're not
8238 emitting a reloc. */
8239 else
8240 {
8241 bfd_vma value = relocation;
8242
8243 if (tls_ty == (TLS_TLS | TLS_LD))
8244 value = 1;
8245 else if (tls_ty != 0)
8246 {
8247 if (htab->elf.tls_sec == NULL)
8248 value = 0;
8249 else
8250 {
8251 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8252 if (tls_ty == (TLS_TLS | TLS_TPREL))
8253 value += DTP_OFFSET - TP_OFFSET;
8254 }
8255
8256 if (tls_ty == (TLS_TLS | TLS_GD))
8257 {
8258 bfd_put_32 (output_bfd, value,
8259 htab->got->contents + off + 4);
8260 value = 1;
8261 }
8262 }
8263 bfd_put_32 (output_bfd, value,
8264 htab->got->contents + off);
8265 }
8266
8267 off += 4;
8268 if (tls_ty & (TLS_LD | TLS_GD))
8269 off += 4;
8270 }
8271 while (tls_m != 0);
8272
8273 off = *offp;
8274 *offp = off | 1;
8275 }
8276
8277 if (off >= (bfd_vma) -2)
8278 abort ();
8279
8280 if ((tls_type & TLS_TLS) != 0)
8281 {
8282 if (tls_type != (TLS_TLS | TLS_LD))
8283 {
8284 if ((tls_mask & TLS_LD) != 0
8285 && !(h == NULL
8286 || !h->def_dynamic))
8287 off += 8;
8288 if (tls_type != (TLS_TLS | TLS_GD))
8289 {
8290 if ((tls_mask & TLS_GD) != 0)
8291 off += 8;
8292 if (tls_type != (TLS_TLS | TLS_DTPREL))
8293 {
8294 if ((tls_mask & TLS_DTPREL) != 0)
8295 off += 4;
8296 }
8297 }
8298 }
8299 }
8300
8301 relocation = (htab->got->output_section->vma
8302 + htab->got->output_offset
8303 + off
8304 - SYM_VAL (htab->elf.hgot));
8305
8306 /* Addends on got relocations don't make much sense.
8307 x+off@got is actually x@got+off, and since the got is
8308 generated by a hash table traversal, the value in the
8309 got at entry m+n bears little relation to the entry m. */
8310 if (addend != 0)
8311 info->callbacks->einfo
8312 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8313 input_bfd, input_section, rel->r_offset,
8314 howto->name,
8315 sym_name);
8316 }
8317 break;
8318
8319 /* Relocations that need no special processing. */
8320 case R_PPC_LOCAL24PC:
8321 /* It makes no sense to point a local relocation
8322 at a symbol not in this object. */
8323 if (unresolved_reloc)
8324 {
8325 if (! (*info->callbacks->undefined_symbol) (info,
8326 h->root.root.string,
8327 input_bfd,
8328 input_section,
8329 rel->r_offset,
8330 TRUE))
8331 return FALSE;
8332 continue;
8333 }
8334 break;
8335
8336 case R_PPC_DTPREL16:
8337 case R_PPC_DTPREL16_LO:
8338 case R_PPC_DTPREL16_HI:
8339 case R_PPC_DTPREL16_HA:
8340 if (htab->elf.tls_sec != NULL)
8341 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8342 break;
8343
8344 /* Relocations that may need to be propagated if this is a shared
8345 object. */
8346 case R_PPC_TPREL16:
8347 case R_PPC_TPREL16_LO:
8348 case R_PPC_TPREL16_HI:
8349 case R_PPC_TPREL16_HA:
8350 if (h != NULL
8351 && h->root.type == bfd_link_hash_undefweak
8352 && h->dynindx == -1)
8353 {
8354 /* Make this relocation against an undefined weak symbol
8355 resolve to zero. This is really just a tweak, since
8356 code using weak externs ought to check that they are
8357 defined before using them. */
8358 bfd_byte *p = contents + rel->r_offset - d_offset;
8359 unsigned int insn = bfd_get_32 (output_bfd, p);
8360 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8361 if (insn != 0)
8362 bfd_put_32 (output_bfd, insn, p);
8363 break;
8364 }
8365 if (htab->elf.tls_sec != NULL)
8366 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8367 /* The TPREL16 relocs shouldn't really be used in shared
8368 libs as they will result in DT_TEXTREL being set, but
8369 support them anyway. */
8370 goto dodyn;
8371
8372 case R_PPC_TPREL32:
8373 if (htab->elf.tls_sec != NULL)
8374 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8375 goto dodyn;
8376
8377 case R_PPC_DTPREL32:
8378 if (htab->elf.tls_sec != NULL)
8379 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8380 goto dodyn;
8381
8382 case R_PPC_DTPMOD32:
8383 relocation = 1;
8384 addend = 0;
8385 goto dodyn;
8386
8387 case R_PPC_REL16:
8388 case R_PPC_REL16_LO:
8389 case R_PPC_REL16_HI:
8390 case R_PPC_REL16_HA:
8391 break;
8392
8393 case R_PPC_REL32:
8394 if (h == NULL || h == htab->elf.hgot)
8395 break;
8396 /* fall through */
8397
8398 case R_PPC_ADDR32:
8399 case R_PPC_ADDR16:
8400 case R_PPC_ADDR16_LO:
8401 case R_PPC_ADDR16_HI:
8402 case R_PPC_ADDR16_HA:
8403 case R_PPC_UADDR32:
8404 case R_PPC_UADDR16:
8405 goto dodyn;
8406
8407 case R_PPC_VLE_REL8:
8408 case R_PPC_VLE_REL15:
8409 case R_PPC_VLE_REL24:
8410 case R_PPC_REL24:
8411 case R_PPC_REL14:
8412 case R_PPC_REL14_BRTAKEN:
8413 case R_PPC_REL14_BRNTAKEN:
8414 /* If these relocations are not to a named symbol, they can be
8415 handled right here, no need to bother the dynamic linker. */
8416 if (SYMBOL_CALLS_LOCAL (info, h)
8417 || h == htab->elf.hgot)
8418 break;
8419 /* fall through */
8420
8421 case R_PPC_ADDR24:
8422 case R_PPC_ADDR14:
8423 case R_PPC_ADDR14_BRTAKEN:
8424 case R_PPC_ADDR14_BRNTAKEN:
8425 if (h != NULL && !info->shared)
8426 break;
8427 /* fall through */
8428
8429 dodyn:
8430 if ((input_section->flags & SEC_ALLOC) == 0
8431 || is_vxworks_tls)
8432 break;
8433
8434 if ((info->shared
8435 && !(h != NULL
8436 && ((h->root.type == bfd_link_hash_undefined
8437 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8438 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8439 || (h->root.type == bfd_link_hash_undefweak
8440 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8441 && (must_be_dyn_reloc (info, r_type)
8442 || !SYMBOL_CALLS_LOCAL (info, h)))
8443 || (ELIMINATE_COPY_RELOCS
8444 && !info->shared
8445 && h != NULL
8446 && h->dynindx != -1
8447 && !h->non_got_ref
8448 && !h->def_regular))
8449 {
8450 int skip;
8451 bfd_byte *loc;
8452 asection *sreloc;
8453 #ifdef DEBUG
8454 fprintf (stderr, "ppc_elf_relocate_section needs to "
8455 "create relocation for %s\n",
8456 (h && h->root.root.string
8457 ? h->root.root.string : "<unknown>"));
8458 #endif
8459
8460 /* When generating a shared object, these relocations
8461 are copied into the output file to be resolved at run
8462 time. */
8463 sreloc = elf_section_data (input_section)->sreloc;
8464 if (ifunc)
8465 sreloc = htab->reliplt;
8466 if (sreloc == NULL)
8467 return FALSE;
8468
8469 skip = 0;
8470 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8471 input_section,
8472 rel->r_offset);
8473 if (outrel.r_offset == (bfd_vma) -1
8474 || outrel.r_offset == (bfd_vma) -2)
8475 skip = (int) outrel.r_offset;
8476 outrel.r_offset += (input_section->output_section->vma
8477 + input_section->output_offset);
8478
8479 if (skip)
8480 memset (&outrel, 0, sizeof outrel);
8481 else if ((h != NULL
8482 && (h->root.type == bfd_link_hash_undefined
8483 || h->root.type == bfd_link_hash_undefweak))
8484 || !SYMBOL_REFERENCES_LOCAL (info, h))
8485 {
8486 BFD_ASSERT (h->dynindx != -1);
8487 unresolved_reloc = FALSE;
8488 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8489 outrel.r_addend = rel->r_addend;
8490 }
8491 else
8492 {
8493 outrel.r_addend = relocation + rel->r_addend;
8494
8495 if (r_type != R_PPC_ADDR32)
8496 {
8497 long indx = 0;
8498
8499 if (ifunc != NULL)
8500 {
8501 /* If we get here when building a static
8502 executable, then the libc startup function
8503 responsible for applying indirect function
8504 relocations is going to complain about
8505 the reloc type.
8506 If we get here when building a dynamic
8507 executable, it will be because we have
8508 a text relocation. The dynamic loader
8509 will set the text segment writable and
8510 non-executable to apply text relocations.
8511 So we'll segfault when trying to run the
8512 indirection function to resolve the reloc. */
8513 info->callbacks->einfo
8514 (_("%P: %H: relocation %s for indirect "
8515 "function %s unsupported\n"),
8516 input_bfd, input_section, rel->r_offset,
8517 howto->name,
8518 sym_name);
8519 ret = FALSE;
8520 }
8521 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8522 ;
8523 else if (sec == NULL || sec->owner == NULL)
8524 {
8525 bfd_set_error (bfd_error_bad_value);
8526 ret = FALSE;
8527 }
8528 else
8529 {
8530 asection *osec;
8531
8532 /* We are turning this relocation into one
8533 against a section symbol. It would be
8534 proper to subtract the symbol's value,
8535 osec->vma, from the emitted reloc addend,
8536 but ld.so expects buggy relocs.
8537 FIXME: Why not always use a zero index? */
8538 osec = sec->output_section;
8539 indx = elf_section_data (osec)->dynindx;
8540 if (indx == 0)
8541 {
8542 osec = htab->elf.text_index_section;
8543 indx = elf_section_data (osec)->dynindx;
8544 }
8545 BFD_ASSERT (indx != 0);
8546 #ifdef DEBUG
8547 if (indx == 0)
8548 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8549 indx, osec->name, osec->flags,
8550 h->root.root.string);
8551 #endif
8552 }
8553
8554 outrel.r_info = ELF32_R_INFO (indx, r_type);
8555 }
8556 else if (ifunc != NULL)
8557 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8558 else
8559 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8560 }
8561
8562 loc = sreloc->contents;
8563 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8564 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8565
8566 if (skip == -1)
8567 continue;
8568
8569 /* This reloc will be computed at runtime. We clear the memory
8570 so that it contains predictable value. */
8571 if (! skip
8572 && ((input_section->flags & SEC_ALLOC) != 0
8573 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8574 {
8575 relocation = howto->pc_relative ? outrel.r_offset : 0;
8576 addend = 0;
8577 break;
8578 }
8579 }
8580 break;
8581
8582 case R_PPC_RELAX_PLT:
8583 case R_PPC_RELAX_PLTREL24:
8584 if (h != NULL)
8585 {
8586 struct plt_entry *ent;
8587 bfd_vma got2_addend = 0;
8588
8589 if (r_type == R_PPC_RELAX_PLTREL24)
8590 {
8591 if (info->shared)
8592 got2_addend = addend;
8593 addend = 0;
8594 }
8595 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8596 if (htab->plt_type == PLT_NEW)
8597 relocation = (htab->glink->output_section->vma
8598 + htab->glink->output_offset
8599 + ent->glink_offset);
8600 else
8601 relocation = (htab->plt->output_section->vma
8602 + htab->plt->output_offset
8603 + ent->plt.offset);
8604 }
8605 /* Fall thru */
8606
8607 case R_PPC_RELAX:
8608 {
8609 const int *stub;
8610 size_t size;
8611 size_t insn_offset = rel->r_offset;
8612 unsigned int insn;
8613
8614 if (info->shared)
8615 {
8616 relocation -= (input_section->output_section->vma
8617 + input_section->output_offset
8618 + rel->r_offset - 4);
8619 stub = shared_stub_entry;
8620 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8621 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8622 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8623 stub += 3;
8624 size = ARRAY_SIZE (shared_stub_entry) - 3;
8625 }
8626 else
8627 {
8628 stub = stub_entry;
8629 size = ARRAY_SIZE (stub_entry);
8630 }
8631
8632 relocation += addend;
8633 if (info->relocatable)
8634 relocation = 0;
8635
8636 /* First insn is HA, second is LO. */
8637 insn = *stub++;
8638 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8639 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8640 insn_offset += 4;
8641
8642 insn = *stub++;
8643 insn |= relocation & 0xffff;
8644 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8645 insn_offset += 4;
8646 size -= 2;
8647
8648 while (size != 0)
8649 {
8650 insn = *stub++;
8651 --size;
8652 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8653 insn_offset += 4;
8654 }
8655
8656 /* Rewrite the reloc and convert one of the trailing nop
8657 relocs to describe this relocation. */
8658 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8659 /* The relocs are at the bottom 2 bytes */
8660 rel[0].r_offset += d_offset;
8661 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8662 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8663 rel[1].r_offset += 4;
8664 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8665 rel++;
8666 }
8667 continue;
8668
8669 /* Indirect .sdata relocation. */
8670 case R_PPC_EMB_SDAI16:
8671 BFD_ASSERT (htab->sdata[0].section != NULL);
8672 if (!is_static_defined (htab->sdata[0].sym))
8673 {
8674 unresolved_reloc = TRUE;
8675 break;
8676 }
8677 relocation
8678 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8679 h, relocation, rel);
8680 addend = 0;
8681 break;
8682
8683 /* Indirect .sdata2 relocation. */
8684 case R_PPC_EMB_SDA2I16:
8685 BFD_ASSERT (htab->sdata[1].section != NULL);
8686 if (!is_static_defined (htab->sdata[1].sym))
8687 {
8688 unresolved_reloc = TRUE;
8689 break;
8690 }
8691 relocation
8692 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8693 h, relocation, rel);
8694 addend = 0;
8695 break;
8696
8697 /* Handle the TOC16 reloc. We want to use the offset within the .got
8698 section, not the actual VMA. This is appropriate when generating
8699 an embedded ELF object, for which the .got section acts like the
8700 AIX .toc section. */
8701 case R_PPC_TOC16: /* phony GOT16 relocations */
8702 if (sec == NULL || sec->output_section == NULL)
8703 {
8704 unresolved_reloc = TRUE;
8705 break;
8706 }
8707 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8708 ".got") == 0
8709 || strcmp (bfd_get_section_name (sec->owner, sec),
8710 ".cgot") == 0);
8711
8712 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8713 break;
8714
8715 case R_PPC_PLTREL24:
8716 if (h != NULL && ifunc == NULL)
8717 {
8718 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8719 info->shared ? addend : 0);
8720 if (ent == NULL
8721 || htab->plt == NULL)
8722 {
8723 /* We didn't make a PLT entry for this symbol. This
8724 happens when statically linking PIC code, or when
8725 using -Bsymbolic. */
8726 }
8727 else
8728 {
8729 /* Relocation is to the entry for this symbol in the
8730 procedure linkage table. */
8731 unresolved_reloc = FALSE;
8732 if (htab->plt_type == PLT_NEW)
8733 relocation = (htab->glink->output_section->vma
8734 + htab->glink->output_offset
8735 + ent->glink_offset);
8736 else
8737 relocation = (htab->plt->output_section->vma
8738 + htab->plt->output_offset
8739 + ent->plt.offset);
8740 }
8741 }
8742
8743 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8744 addend specifies the GOT pointer offset within .got2.
8745 Don't apply it to the relocation field. */
8746 addend = 0;
8747 break;
8748
8749 /* Relocate against _SDA_BASE_. */
8750 case R_PPC_SDAREL16:
8751 {
8752 const char *name;
8753 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8754
8755 if (sec == NULL
8756 || sec->output_section == NULL
8757 || !is_static_defined (sda))
8758 {
8759 unresolved_reloc = TRUE;
8760 break;
8761 }
8762 addend -= SYM_VAL (sda);
8763
8764 name = bfd_get_section_name (output_bfd, sec->output_section);
8765 if (!(strcmp (name, ".sdata") == 0
8766 || strcmp (name, ".sbss") == 0))
8767 {
8768 info->callbacks->einfo
8769 (_("%P: %B: the target (%s) of a %s relocation is "
8770 "in the wrong output section (%s)\n"),
8771 input_bfd,
8772 sym_name,
8773 howto->name,
8774 name);
8775 }
8776 }
8777 break;
8778
8779 /* Relocate against _SDA2_BASE_. */
8780 case R_PPC_EMB_SDA2REL:
8781 {
8782 const char *name;
8783 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8784
8785 if (sec == NULL
8786 || sec->output_section == NULL
8787 || !is_static_defined (sda))
8788 {
8789 unresolved_reloc = TRUE;
8790 break;
8791 }
8792 addend -= SYM_VAL (sda);
8793
8794 name = bfd_get_section_name (output_bfd, sec->output_section);
8795 if (!(strcmp (name, ".sdata2") == 0
8796 || strcmp (name, ".sbss2") == 0))
8797 {
8798 info->callbacks->einfo
8799 (_("%P: %B: the target (%s) of a %s relocation is "
8800 "in the wrong output section (%s)\n"),
8801 input_bfd,
8802 sym_name,
8803 howto->name,
8804 name);
8805 }
8806 }
8807 break;
8808
8809 case R_PPC_VLE_LO16A:
8810 relocation = relocation + addend;
8811 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8812 relocation, split16a_type);
8813 continue;
8814
8815 case R_PPC_VLE_LO16D:
8816 relocation = relocation + addend;
8817 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8818 relocation, split16d_type);
8819 continue;
8820
8821 case R_PPC_VLE_HI16A:
8822 relocation = (relocation + addend) >> 16;
8823 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8824 relocation, split16a_type);
8825 continue;
8826
8827 case R_PPC_VLE_HI16D:
8828 relocation = (relocation + addend) >> 16;
8829 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8830 relocation, split16d_type);
8831 continue;
8832
8833 case R_PPC_VLE_HA16A:
8834 relocation = (relocation + addend + 0x8000) >> 16;
8835 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8836 relocation, split16a_type);
8837 continue;
8838
8839 case R_PPC_VLE_HA16D:
8840 relocation = (relocation + addend + 0x8000) >> 16;
8841 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8842 relocation, split16d_type);
8843 continue;
8844
8845 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8846 case R_PPC_EMB_SDA21:
8847 case R_PPC_VLE_SDA21:
8848 case R_PPC_EMB_RELSDA:
8849 case R_PPC_VLE_SDA21_LO:
8850 {
8851 const char *name;
8852 int reg;
8853 unsigned int insn;
8854 struct elf_link_hash_entry *sda = NULL;
8855
8856 if (sec == NULL || sec->output_section == NULL)
8857 {
8858 unresolved_reloc = TRUE;
8859 break;
8860 }
8861
8862 name = bfd_get_section_name (output_bfd, sec->output_section);
8863 if (strcmp (name, ".sdata") == 0
8864 || strcmp (name, ".sbss") == 0)
8865 {
8866 reg = 13;
8867 sda = htab->sdata[0].sym;
8868 }
8869 else if (strcmp (name, ".sdata2") == 0
8870 || strcmp (name, ".sbss2") == 0)
8871 {
8872 reg = 2;
8873 sda = htab->sdata[1].sym;
8874 }
8875 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8876 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8877 {
8878 reg = 0;
8879 }
8880 else
8881 {
8882 info->callbacks->einfo
8883 (_("%P: %B: the target (%s) of a %s relocation is "
8884 "in the wrong output section (%s)\n"),
8885 input_bfd,
8886 sym_name,
8887 howto->name,
8888 name);
8889
8890 bfd_set_error (bfd_error_bad_value);
8891 ret = FALSE;
8892 continue;
8893 }
8894
8895 if (sda != NULL)
8896 {
8897 if (!is_static_defined (sda))
8898 {
8899 unresolved_reloc = TRUE;
8900 break;
8901 }
8902 addend -= SYM_VAL (sda);
8903 }
8904
8905 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8906 if (reg == 0
8907 && (r_type == R_PPC_VLE_SDA21
8908 || r_type == R_PPC_VLE_SDA21_LO))
8909 {
8910 relocation = relocation + addend;
8911 addend = 0;
8912
8913 /* Force e_li insn, keeping RT from original insn. */
8914 insn &= 0x1f << 21;
8915 insn |= 28u << 26;
8916
8917 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8918 /* Top 4 bits of value to 17..20. */
8919 insn |= (relocation & 0xf0000) >> 5;
8920 /* Next 5 bits of the value to 11..15. */
8921 insn |= (relocation & 0xf800) << 5;
8922 /* And the final 11 bits of the value to bits 21 to 31. */
8923 insn |= relocation & 0x7ff;
8924
8925 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8926
8927 if (r_type == R_PPC_VLE_SDA21
8928 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8929 goto overflow;
8930 continue;
8931 }
8932 else if (r_type == R_PPC_EMB_SDA21
8933 || r_type == R_PPC_VLE_SDA21
8934 || r_type == R_PPC_VLE_SDA21_LO)
8935 {
8936 /* Fill in register field. */
8937 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8938 }
8939 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8940 }
8941 break;
8942
8943 case R_PPC_VLE_SDAREL_LO16A:
8944 case R_PPC_VLE_SDAREL_LO16D:
8945 case R_PPC_VLE_SDAREL_HI16A:
8946 case R_PPC_VLE_SDAREL_HI16D:
8947 case R_PPC_VLE_SDAREL_HA16A:
8948 case R_PPC_VLE_SDAREL_HA16D:
8949 {
8950 bfd_vma value;
8951 const char *name;
8952 //int reg;
8953 struct elf_link_hash_entry *sda = NULL;
8954
8955 if (sec == NULL || sec->output_section == NULL)
8956 {
8957 unresolved_reloc = TRUE;
8958 break;
8959 }
8960
8961 name = bfd_get_section_name (output_bfd, sec->output_section);
8962 if (strcmp (name, ".sdata") == 0
8963 || strcmp (name, ".sbss") == 0)
8964 {
8965 //reg = 13;
8966 sda = htab->sdata[0].sym;
8967 }
8968 else if (strcmp (name, ".sdata2") == 0
8969 || strcmp (name, ".sbss2") == 0)
8970 {
8971 //reg = 2;
8972 sda = htab->sdata[1].sym;
8973 }
8974 else
8975 {
8976 (*_bfd_error_handler)
8977 (_("%B: the target (%s) of a %s relocation is "
8978 "in the wrong output section (%s)"),
8979 input_bfd,
8980 sym_name,
8981 howto->name,
8982 name);
8983
8984 bfd_set_error (bfd_error_bad_value);
8985 ret = FALSE;
8986 continue;
8987 }
8988
8989 if (sda != NULL)
8990 {
8991 if (!is_static_defined (sda))
8992 {
8993 unresolved_reloc = TRUE;
8994 break;
8995 }
8996 }
8997
8998 value = (sda->root.u.def.section->output_section->vma
8999 + sda->root.u.def.section->output_offset
9000 + addend);
9001
9002 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9003 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9004 value, split16a_type);
9005 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9006 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9007 value, split16d_type);
9008 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9009 {
9010 value = value >> 16;
9011 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9012 value, split16a_type);
9013 }
9014 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9015 {
9016 value = value >> 16;
9017 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9018 value, split16d_type);
9019 }
9020 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9021 {
9022 value = (value + 0x8000) >> 16;
9023 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9024 value, split16a_type);
9025 }
9026 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9027 {
9028 value = (value + 0x8000) >> 16;
9029 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9030 value, split16d_type);
9031 }
9032 }
9033 continue;
9034
9035 /* Relocate against the beginning of the section. */
9036 case R_PPC_SECTOFF:
9037 case R_PPC_SECTOFF_LO:
9038 case R_PPC_SECTOFF_HI:
9039 case R_PPC_SECTOFF_HA:
9040 if (sec == NULL || sec->output_section == NULL)
9041 {
9042 unresolved_reloc = TRUE;
9043 break;
9044 }
9045 addend -= sec->output_section->vma;
9046 break;
9047
9048 /* Negative relocations. */
9049 case R_PPC_EMB_NADDR32:
9050 case R_PPC_EMB_NADDR16:
9051 case R_PPC_EMB_NADDR16_LO:
9052 case R_PPC_EMB_NADDR16_HI:
9053 case R_PPC_EMB_NADDR16_HA:
9054 addend -= 2 * relocation;
9055 break;
9056
9057 case R_PPC_COPY:
9058 case R_PPC_GLOB_DAT:
9059 case R_PPC_JMP_SLOT:
9060 case R_PPC_RELATIVE:
9061 case R_PPC_IRELATIVE:
9062 case R_PPC_PLT32:
9063 case R_PPC_PLTREL32:
9064 case R_PPC_PLT16_LO:
9065 case R_PPC_PLT16_HI:
9066 case R_PPC_PLT16_HA:
9067 case R_PPC_ADDR30:
9068 case R_PPC_EMB_RELSEC16:
9069 case R_PPC_EMB_RELST_LO:
9070 case R_PPC_EMB_RELST_HI:
9071 case R_PPC_EMB_RELST_HA:
9072 case R_PPC_EMB_BIT_FLD:
9073 info->callbacks->einfo
9074 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9075 input_bfd,
9076 howto->name,
9077 sym_name);
9078
9079 bfd_set_error (bfd_error_invalid_operation);
9080 ret = FALSE;
9081 continue;
9082 }
9083
9084 /* Do any further special processing. */
9085 switch (r_type)
9086 {
9087 default:
9088 break;
9089
9090 case R_PPC_ADDR16_HA:
9091 case R_PPC_REL16_HA:
9092 case R_PPC_SECTOFF_HA:
9093 case R_PPC_TPREL16_HA:
9094 case R_PPC_DTPREL16_HA:
9095 case R_PPC_EMB_NADDR16_HA:
9096 case R_PPC_EMB_RELST_HA:
9097 /* It's just possible that this symbol is a weak symbol
9098 that's not actually defined anywhere. In that case,
9099 'sec' would be NULL, and we should leave the symbol
9100 alone (it will be set to zero elsewhere in the link). */
9101 if (sec == NULL)
9102 break;
9103 /* Fall thru */
9104
9105 case R_PPC_PLT16_HA:
9106 case R_PPC_GOT16_HA:
9107 case R_PPC_GOT_TLSGD16_HA:
9108 case R_PPC_GOT_TLSLD16_HA:
9109 case R_PPC_GOT_TPREL16_HA:
9110 case R_PPC_GOT_DTPREL16_HA:
9111 /* Add 0x10000 if sign bit in 0:15 is set.
9112 Bits 0:15 are not used. */
9113 addend += 0x8000;
9114 break;
9115
9116 case R_PPC_ADDR16:
9117 case R_PPC_ADDR16_LO:
9118 case R_PPC_GOT16:
9119 case R_PPC_GOT16_LO:
9120 case R_PPC_SDAREL16:
9121 case R_PPC_SECTOFF:
9122 case R_PPC_SECTOFF_LO:
9123 case R_PPC_DTPREL16:
9124 case R_PPC_DTPREL16_LO:
9125 case R_PPC_TPREL16:
9126 case R_PPC_TPREL16_LO:
9127 case R_PPC_GOT_TLSGD16:
9128 case R_PPC_GOT_TLSGD16_LO:
9129 case R_PPC_GOT_TLSLD16:
9130 case R_PPC_GOT_TLSLD16_LO:
9131 case R_PPC_GOT_DTPREL16:
9132 case R_PPC_GOT_DTPREL16_LO:
9133 case R_PPC_GOT_TPREL16:
9134 case R_PPC_GOT_TPREL16_LO:
9135 {
9136 /* The 32-bit ABI lacks proper relocations to deal with
9137 certain 64-bit instructions. Prevent damage to bits
9138 that make up part of the insn opcode. */
9139 unsigned int insn, mask, lobit;
9140
9141 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9142 mask = 0;
9143 if (is_insn_ds_form (insn))
9144 mask = 3;
9145 else if (is_insn_dq_form (insn))
9146 mask = 15;
9147 else
9148 break;
9149 lobit = mask & (relocation + addend);
9150 if (lobit != 0)
9151 {
9152 addend -= lobit;
9153 info->callbacks->einfo
9154 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9155 input_bfd, input_section, rel->r_offset,
9156 howto->name, sym_name, mask + 1);
9157 bfd_set_error (bfd_error_bad_value);
9158 ret = FALSE;
9159 }
9160 addend += insn & mask;
9161 }
9162 break;
9163 }
9164
9165 #ifdef DEBUG
9166 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9167 "offset = %ld, addend = %ld\n",
9168 howto->name,
9169 (int) r_type,
9170 sym_name,
9171 r_symndx,
9172 (long) rel->r_offset,
9173 (long) addend);
9174 #endif
9175
9176 if (unresolved_reloc
9177 && !((input_section->flags & SEC_DEBUGGING) != 0
9178 && h->def_dynamic)
9179 && _bfd_elf_section_offset (output_bfd, info, input_section,
9180 rel->r_offset) != (bfd_vma) -1)
9181 {
9182 info->callbacks->einfo
9183 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9184 input_bfd, input_section, rel->r_offset,
9185 howto->name,
9186 sym_name);
9187 ret = FALSE;
9188 }
9189
9190 /* 16-bit fields in insns mostly have signed values, but a
9191 few insns have 16-bit unsigned values. Really, we should
9192 have different reloc types. */
9193 if (howto->complain_on_overflow != complain_overflow_dont
9194 && howto->dst_mask == 0xffff
9195 && (input_section->flags & SEC_CODE) != 0)
9196 {
9197 enum complain_overflow complain = complain_overflow_signed;
9198
9199 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9200 {
9201 unsigned int insn;
9202
9203 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9204 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9205 complain = complain_overflow_bitfield;
9206 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9207 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9208 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9209 complain = complain_overflow_unsigned;
9210 }
9211 if (howto->complain_on_overflow != complain)
9212 {
9213 alt_howto = *howto;
9214 alt_howto.complain_on_overflow = complain;
9215 howto = &alt_howto;
9216 }
9217 }
9218
9219 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9220 rel->r_offset, relocation, addend);
9221
9222 if (r != bfd_reloc_ok)
9223 {
9224 if (r == bfd_reloc_overflow)
9225 {
9226 overflow:
9227 if (warned)
9228 continue;
9229 if (h != NULL
9230 && h->root.type == bfd_link_hash_undefweak
9231 && howto->pc_relative)
9232 {
9233 /* Assume this is a call protected by other code that
9234 detect the symbol is undefined. If this is the case,
9235 we can safely ignore the overflow. If not, the
9236 program is hosed anyway, and a little warning isn't
9237 going to help. */
9238
9239 continue;
9240 }
9241
9242 if (! (*info->callbacks->reloc_overflow) (info,
9243 (h ? &h->root : NULL),
9244 sym_name,
9245 howto->name,
9246 rel->r_addend,
9247 input_bfd,
9248 input_section,
9249 rel->r_offset))
9250 return FALSE;
9251 }
9252 else
9253 {
9254 info->callbacks->einfo
9255 (_("%P: %H: %s reloc against `%s': error %d\n"),
9256 input_bfd, input_section, rel->r_offset,
9257 howto->name, sym_name, (int) r);
9258 ret = FALSE;
9259 }
9260 }
9261 }
9262
9263 #ifdef DEBUG
9264 fprintf (stderr, "\n");
9265 #endif
9266
9267 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9268 && input_section->size != input_section->rawsize
9269 && (strcmp (input_section->output_section->name, ".init") == 0
9270 || strcmp (input_section->output_section->name, ".fini") == 0))
9271 {
9272 /* Branch around the trampolines. */
9273 unsigned int insn = B + input_section->size - input_section->rawsize;
9274 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9275 }
9276
9277 if (htab->params->ppc476_workaround
9278 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9279 && (!info->relocatable
9280 || (input_section->output_section->alignment_power
9281 >= htab->params->pagesize_p2)))
9282 {
9283 struct ppc_elf_relax_info *relax_info;
9284 bfd_vma start_addr, end_addr, addr;
9285 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9286
9287 relax_info = elf_section_data (input_section)->sec_info;
9288 if (relax_info->workaround_size != 0)
9289 {
9290 bfd_byte *p;
9291 unsigned int n;
9292 bfd_byte fill[4];
9293
9294 bfd_put_32 (input_bfd, BA, fill);
9295 p = contents + input_section->size - relax_info->workaround_size;
9296 n = relax_info->workaround_size >> 2;
9297 while (n--)
9298 {
9299 memcpy (p, fill, 4);
9300 p += 4;
9301 }
9302 }
9303
9304 /* The idea is: Replace the last instruction on a page with a
9305 branch to a patch area. Put the insn there followed by a
9306 branch back to the next page. Complicated a little by
9307 needing to handle moved conditional branches, and by not
9308 wanting to touch data-in-text. */
9309
9310 start_addr = (input_section->output_section->vma
9311 + input_section->output_offset);
9312 end_addr = (start_addr + input_section->size
9313 - relax_info->workaround_size);
9314 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9315 addr < end_addr;
9316 addr += pagesize)
9317 {
9318 bfd_vma offset = addr - start_addr;
9319 Elf_Internal_Rela *lo, *hi;
9320 bfd_boolean is_data;
9321 bfd_vma patch_off, patch_addr;
9322 unsigned int insn;
9323
9324 /* Do we have a data reloc at this offset? If so, leave
9325 the word alone. */
9326 is_data = FALSE;
9327 lo = relocs;
9328 hi = relend;
9329 rel = NULL;
9330 while (lo < hi)
9331 {
9332 rel = lo + (hi - lo) / 2;
9333 if (rel->r_offset < offset)
9334 lo = rel + 1;
9335 else if (rel->r_offset > offset + 3)
9336 hi = rel;
9337 else
9338 {
9339 switch (ELF32_R_TYPE (rel->r_info))
9340 {
9341 case R_PPC_ADDR32:
9342 case R_PPC_UADDR32:
9343 case R_PPC_REL32:
9344 case R_PPC_ADDR30:
9345 is_data = TRUE;
9346 break;
9347 default:
9348 break;
9349 }
9350 break;
9351 }
9352 }
9353 if (is_data)
9354 continue;
9355
9356 /* Some instructions can be left alone too. Unconditional
9357 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9358 avoid the icache failure.
9359
9360 The problem occurs due to prefetch across a page boundary
9361 where stale instructions can be fetched from the next
9362 page, and the mechanism for flushing these bad
9363 instructions fails under certain circumstances. The
9364 unconditional branches:
9365 1) Branch: b, bl, ba, bla,
9366 2) Branch Conditional: bc, bca, bcl, bcla,
9367 3) Branch Conditional to Link Register: bclr, bclrl,
9368 where (2) and (3) have BO=0x14 making them unconditional,
9369 prevent the bad prefetch because the prefetch itself is
9370 affected by these instructions. This happens even if the
9371 instruction is not executed.
9372
9373 A bctr example:
9374 .
9375 . lis 9,new_page@ha
9376 . addi 9,9,new_page@l
9377 . mtctr 9
9378 . bctr
9379 . nop
9380 . nop
9381 . new_page:
9382 .
9383 The bctr is not predicted taken due to ctr not being
9384 ready, so prefetch continues on past the bctr into the
9385 new page which might have stale instructions. If they
9386 fail to be flushed, then they will be executed after the
9387 bctr executes. Either of the following modifications
9388 prevent the bad prefetch from happening in the first
9389 place:
9390 .
9391 . lis 9,new_page@ha lis 9,new_page@ha
9392 . addi 9,9,new_page@l addi 9,9,new_page@l
9393 . mtctr 9 mtctr 9
9394 . bctr bctr
9395 . nop b somewhere_else
9396 . b somewhere_else nop
9397 . new_page: new_page:
9398 . */
9399 insn = bfd_get_32 (input_bfd, contents + offset);
9400 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9401 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9402 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9403 || ((insn & (0x3f << 26)) == (19u << 26)
9404 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9405 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9406 continue;
9407
9408 patch_addr = (start_addr + input_section->size
9409 - relax_info->workaround_size);
9410 patch_addr = (patch_addr + 15) & -16;
9411 patch_off = patch_addr - start_addr;
9412 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9413
9414 if (rel != NULL
9415 && rel->r_offset >= offset
9416 && rel->r_offset < offset + 4)
9417 {
9418 /* If the insn we are patching had a reloc, adjust the
9419 reloc r_offset so that the reloc applies to the moved
9420 location. This matters for -r and --emit-relocs. */
9421 if (rel + 1 != relend)
9422 {
9423 Elf_Internal_Rela tmp = *rel;
9424
9425 /* Keep the relocs sorted by r_offset. */
9426 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9427 relend[-1] = tmp;
9428 }
9429 relend[-1].r_offset += patch_off - offset;
9430 }
9431 else
9432 rel = NULL;
9433
9434 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9435 && (insn & 2) == 0 /* relative */)
9436 {
9437 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9438
9439 delta += offset - patch_off;
9440 if (info->relocatable && rel != NULL)
9441 delta = 0;
9442 if (!info->relocatable && rel != NULL)
9443 {
9444 enum elf_ppc_reloc_type r_type;
9445
9446 r_type = ELF32_R_TYPE (relend[-1].r_info);
9447 if (r_type == R_PPC_REL14_BRTAKEN)
9448 insn |= BRANCH_PREDICT_BIT;
9449 else if (r_type == R_PPC_REL14_BRNTAKEN)
9450 insn &= ~BRANCH_PREDICT_BIT;
9451 else
9452 BFD_ASSERT (r_type == R_PPC_REL14);
9453
9454 if ((r_type == R_PPC_REL14_BRTAKEN
9455 || r_type == R_PPC_REL14_BRNTAKEN)
9456 && delta + 0x8000 < 0x10000
9457 && (bfd_signed_vma) delta < 0)
9458 insn ^= BRANCH_PREDICT_BIT;
9459 }
9460 if (delta + 0x8000 < 0x10000)
9461 {
9462 bfd_put_32 (input_bfd,
9463 (insn & ~0xfffc) | (delta & 0xfffc),
9464 contents + patch_off);
9465 patch_off += 4;
9466 bfd_put_32 (input_bfd,
9467 B | ((offset + 4 - patch_off) & 0x3fffffc),
9468 contents + patch_off);
9469 patch_off += 4;
9470 }
9471 else
9472 {
9473 if (rel != NULL)
9474 {
9475 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9476
9477 relend[-1].r_offset += 8;
9478 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9479 }
9480 bfd_put_32 (input_bfd,
9481 (insn & ~0xfffc) | 8,
9482 contents + patch_off);
9483 patch_off += 4;
9484 bfd_put_32 (input_bfd,
9485 B | ((offset + 4 - patch_off) & 0x3fffffc),
9486 contents + patch_off);
9487 patch_off += 4;
9488 bfd_put_32 (input_bfd,
9489 B | ((delta - 8) & 0x3fffffc),
9490 contents + patch_off);
9491 patch_off += 4;
9492 }
9493 }
9494 else
9495 {
9496 bfd_put_32 (input_bfd, insn, contents + patch_off);
9497 patch_off += 4;
9498 bfd_put_32 (input_bfd,
9499 B | ((offset + 4 - patch_off) & 0x3fffffc),
9500 contents + patch_off);
9501 patch_off += 4;
9502 }
9503 BFD_ASSERT (patch_off <= input_section->size);
9504 relax_info->workaround_size = input_section->size - patch_off;
9505 }
9506 }
9507
9508 return ret;
9509 }
9510 \f
9511 /* Finish up dynamic symbol handling. We set the contents of various
9512 dynamic sections here. */
9513
9514 static bfd_boolean
9515 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9516 struct bfd_link_info *info,
9517 struct elf_link_hash_entry *h,
9518 Elf_Internal_Sym *sym)
9519 {
9520 struct ppc_elf_link_hash_table *htab;
9521 struct plt_entry *ent;
9522 bfd_boolean doneone;
9523
9524 #ifdef DEBUG
9525 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9526 h->root.root.string);
9527 #endif
9528
9529 htab = ppc_elf_hash_table (info);
9530 BFD_ASSERT (htab->elf.dynobj != NULL);
9531
9532 doneone = FALSE;
9533 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9534 if (ent->plt.offset != (bfd_vma) -1)
9535 {
9536 if (!doneone)
9537 {
9538 Elf_Internal_Rela rela;
9539 bfd_byte *loc;
9540 bfd_vma reloc_index;
9541
9542 if (htab->plt_type == PLT_NEW
9543 || !htab->elf.dynamic_sections_created
9544 || h->dynindx == -1)
9545 reloc_index = ent->plt.offset / 4;
9546 else
9547 {
9548 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9549 / htab->plt_slot_size);
9550 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9551 && htab->plt_type == PLT_OLD)
9552 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9553 }
9554
9555 /* This symbol has an entry in the procedure linkage table.
9556 Set it up. */
9557 if (htab->plt_type == PLT_VXWORKS
9558 && htab->elf.dynamic_sections_created
9559 && h->dynindx != -1)
9560 {
9561 bfd_vma got_offset;
9562 const bfd_vma *plt_entry;
9563
9564 /* The first three entries in .got.plt are reserved. */
9565 got_offset = (reloc_index + 3) * 4;
9566
9567 /* Use the right PLT. */
9568 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9569 : ppc_elf_vxworks_plt_entry;
9570
9571 /* Fill in the .plt on VxWorks. */
9572 if (info->shared)
9573 {
9574 bfd_put_32 (output_bfd,
9575 plt_entry[0] | PPC_HA (got_offset),
9576 htab->plt->contents + ent->plt.offset + 0);
9577 bfd_put_32 (output_bfd,
9578 plt_entry[1] | PPC_LO (got_offset),
9579 htab->plt->contents + ent->plt.offset + 4);
9580 }
9581 else
9582 {
9583 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9584
9585 bfd_put_32 (output_bfd,
9586 plt_entry[0] | PPC_HA (got_loc),
9587 htab->plt->contents + ent->plt.offset + 0);
9588 bfd_put_32 (output_bfd,
9589 plt_entry[1] | PPC_LO (got_loc),
9590 htab->plt->contents + ent->plt.offset + 4);
9591 }
9592
9593 bfd_put_32 (output_bfd, plt_entry[2],
9594 htab->plt->contents + ent->plt.offset + 8);
9595 bfd_put_32 (output_bfd, plt_entry[3],
9596 htab->plt->contents + ent->plt.offset + 12);
9597
9598 /* This instruction is an immediate load. The value loaded is
9599 the byte offset of the R_PPC_JMP_SLOT relocation from the
9600 start of the .rela.plt section. The value is stored in the
9601 low-order 16 bits of the load instruction. */
9602 /* NOTE: It appears that this is now an index rather than a
9603 prescaled offset. */
9604 bfd_put_32 (output_bfd,
9605 plt_entry[4] | reloc_index,
9606 htab->plt->contents + ent->plt.offset + 16);
9607 /* This instruction is a PC-relative branch whose target is
9608 the start of the PLT section. The address of this branch
9609 instruction is 20 bytes beyond the start of this PLT entry.
9610 The address is encoded in bits 6-29, inclusive. The value
9611 stored is right-shifted by two bits, permitting a 26-bit
9612 offset. */
9613 bfd_put_32 (output_bfd,
9614 (plt_entry[5]
9615 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9616 htab->plt->contents + ent->plt.offset + 20);
9617 bfd_put_32 (output_bfd, plt_entry[6],
9618 htab->plt->contents + ent->plt.offset + 24);
9619 bfd_put_32 (output_bfd, plt_entry[7],
9620 htab->plt->contents + ent->plt.offset + 28);
9621
9622 /* Fill in the GOT entry corresponding to this PLT slot with
9623 the address immediately after the "bctr" instruction
9624 in this PLT entry. */
9625 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9626 + htab->plt->output_offset
9627 + ent->plt.offset + 16),
9628 htab->sgotplt->contents + got_offset);
9629
9630 if (!info->shared)
9631 {
9632 /* Fill in a couple of entries in .rela.plt.unloaded. */
9633 loc = htab->srelplt2->contents
9634 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9635 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9636 * sizeof (Elf32_External_Rela));
9637
9638 /* Provide the @ha relocation for the first instruction. */
9639 rela.r_offset = (htab->plt->output_section->vma
9640 + htab->plt->output_offset
9641 + ent->plt.offset + 2);
9642 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9643 R_PPC_ADDR16_HA);
9644 rela.r_addend = got_offset;
9645 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9646 loc += sizeof (Elf32_External_Rela);
9647
9648 /* Provide the @l relocation for the second instruction. */
9649 rela.r_offset = (htab->plt->output_section->vma
9650 + htab->plt->output_offset
9651 + ent->plt.offset + 6);
9652 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9653 R_PPC_ADDR16_LO);
9654 rela.r_addend = got_offset;
9655 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9656 loc += sizeof (Elf32_External_Rela);
9657
9658 /* Provide a relocation for the GOT entry corresponding to this
9659 PLT slot. Point it at the middle of the .plt entry. */
9660 rela.r_offset = (htab->sgotplt->output_section->vma
9661 + htab->sgotplt->output_offset
9662 + got_offset);
9663 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9664 R_PPC_ADDR32);
9665 rela.r_addend = ent->plt.offset + 16;
9666 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9667 }
9668
9669 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9670 In particular, the offset for the relocation is not the
9671 address of the PLT entry for this function, as specified
9672 by the ABI. Instead, the offset is set to the address of
9673 the GOT slot for this function. See EABI 4.4.4.1. */
9674 rela.r_offset = (htab->sgotplt->output_section->vma
9675 + htab->sgotplt->output_offset
9676 + got_offset);
9677
9678 }
9679 else
9680 {
9681 asection *splt = htab->plt;
9682 if (!htab->elf.dynamic_sections_created
9683 || h->dynindx == -1)
9684 splt = htab->iplt;
9685
9686 rela.r_offset = (splt->output_section->vma
9687 + splt->output_offset
9688 + ent->plt.offset);
9689 if (htab->plt_type == PLT_OLD
9690 || !htab->elf.dynamic_sections_created
9691 || h->dynindx == -1)
9692 {
9693 /* We don't need to fill in the .plt. The ppc dynamic
9694 linker will fill it in. */
9695 }
9696 else
9697 {
9698 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9699 + htab->glink->output_section->vma
9700 + htab->glink->output_offset);
9701 bfd_put_32 (output_bfd, val,
9702 splt->contents + ent->plt.offset);
9703 }
9704 }
9705
9706 /* Fill in the entry in the .rela.plt section. */
9707 rela.r_addend = 0;
9708 if (!htab->elf.dynamic_sections_created
9709 || h->dynindx == -1)
9710 {
9711 BFD_ASSERT (h->type == STT_GNU_IFUNC
9712 && h->def_regular
9713 && (h->root.type == bfd_link_hash_defined
9714 || h->root.type == bfd_link_hash_defweak));
9715 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9716 rela.r_addend = SYM_VAL (h);
9717 }
9718 else
9719 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9720
9721 if (!htab->elf.dynamic_sections_created
9722 || h->dynindx == -1)
9723 loc = (htab->reliplt->contents
9724 + (htab->reliplt->reloc_count++
9725 * sizeof (Elf32_External_Rela)));
9726 else
9727 loc = (htab->relplt->contents
9728 + reloc_index * sizeof (Elf32_External_Rela));
9729 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9730
9731 if (!h->def_regular)
9732 {
9733 /* Mark the symbol as undefined, rather than as
9734 defined in the .plt section. Leave the value if
9735 there were any relocations where pointer equality
9736 matters (this is a clue for the dynamic linker, to
9737 make function pointer comparisons work between an
9738 application and shared library), otherwise set it
9739 to zero. */
9740 sym->st_shndx = SHN_UNDEF;
9741 if (!h->pointer_equality_needed)
9742 sym->st_value = 0;
9743 else if (!h->ref_regular_nonweak)
9744 {
9745 /* This breaks function pointer comparisons, but
9746 that is better than breaking tests for a NULL
9747 function pointer. */
9748 sym->st_value = 0;
9749 }
9750 }
9751 else if (h->type == STT_GNU_IFUNC
9752 && !info->shared)
9753 {
9754 /* Set the value of ifunc symbols in a non-pie
9755 executable to the glink entry. This is to avoid
9756 text relocations. We can't do this for ifunc in
9757 allocate_dynrelocs, as we do for normal dynamic
9758 function symbols with plt entries, because we need
9759 to keep the original value around for the ifunc
9760 relocation. */
9761 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9762 (output_bfd, htab->glink->output_section));
9763 sym->st_value = (ent->glink_offset
9764 + htab->glink->output_offset
9765 + htab->glink->output_section->vma);
9766 }
9767 doneone = TRUE;
9768 }
9769
9770 if (htab->plt_type == PLT_NEW
9771 || !htab->elf.dynamic_sections_created
9772 || h->dynindx == -1)
9773 {
9774 unsigned char *p;
9775 asection *splt = htab->plt;
9776 if (!htab->elf.dynamic_sections_created
9777 || h->dynindx == -1)
9778 splt = htab->iplt;
9779
9780 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9781
9782 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9783 {
9784 bfd_put_32 (output_bfd, LWZ_11_3, p);
9785 p += 4;
9786 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9787 p += 4;
9788 bfd_put_32 (output_bfd, MR_0_3, p);
9789 p += 4;
9790 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9791 p += 4;
9792 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9793 p += 4;
9794 bfd_put_32 (output_bfd, BEQLR, p);
9795 p += 4;
9796 bfd_put_32 (output_bfd, MR_3_0, p);
9797 p += 4;
9798 bfd_put_32 (output_bfd, NOP, p);
9799 p += 4;
9800 }
9801
9802 write_glink_stub (ent, splt, p, info);
9803
9804 if (!info->shared)
9805 /* We only need one non-PIC glink stub. */
9806 break;
9807 }
9808 else
9809 break;
9810 }
9811
9812 if (h->needs_copy)
9813 {
9814 asection *s;
9815 Elf_Internal_Rela rela;
9816 bfd_byte *loc;
9817
9818 /* This symbols needs a copy reloc. Set it up. */
9819
9820 #ifdef DEBUG
9821 fprintf (stderr, ", copy");
9822 #endif
9823
9824 BFD_ASSERT (h->dynindx != -1);
9825
9826 if (ppc_elf_hash_entry (h)->has_sda_refs)
9827 s = htab->relsbss;
9828 else
9829 s = htab->relbss;
9830 BFD_ASSERT (s != NULL);
9831
9832 rela.r_offset = SYM_VAL (h);
9833 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9834 rela.r_addend = 0;
9835 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9836 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9837 }
9838
9839 #ifdef DEBUG
9840 fprintf (stderr, "\n");
9841 #endif
9842
9843 return TRUE;
9844 }
9845 \f
9846 static enum elf_reloc_type_class
9847 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9848 const asection *rel_sec,
9849 const Elf_Internal_Rela *rela)
9850 {
9851 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9852
9853 if (rel_sec == htab->reliplt)
9854 return reloc_class_ifunc;
9855
9856 switch (ELF32_R_TYPE (rela->r_info))
9857 {
9858 case R_PPC_RELATIVE:
9859 return reloc_class_relative;
9860 case R_PPC_JMP_SLOT:
9861 return reloc_class_plt;
9862 case R_PPC_COPY:
9863 return reloc_class_copy;
9864 default:
9865 return reloc_class_normal;
9866 }
9867 }
9868 \f
9869 /* Finish up the dynamic sections. */
9870
9871 static bfd_boolean
9872 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9873 struct bfd_link_info *info)
9874 {
9875 asection *sdyn;
9876 asection *splt;
9877 struct ppc_elf_link_hash_table *htab;
9878 bfd_vma got;
9879 bfd *dynobj;
9880 bfd_boolean ret = TRUE;
9881
9882 #ifdef DEBUG
9883 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9884 #endif
9885
9886 htab = ppc_elf_hash_table (info);
9887 dynobj = elf_hash_table (info)->dynobj;
9888 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9889 if (htab->is_vxworks)
9890 splt = bfd_get_linker_section (dynobj, ".plt");
9891 else
9892 splt = NULL;
9893
9894 got = 0;
9895 if (htab->elf.hgot != NULL)
9896 got = SYM_VAL (htab->elf.hgot);
9897
9898 if (htab->elf.dynamic_sections_created)
9899 {
9900 Elf32_External_Dyn *dyncon, *dynconend;
9901
9902 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9903
9904 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9905 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9906 for (; dyncon < dynconend; dyncon++)
9907 {
9908 Elf_Internal_Dyn dyn;
9909 asection *s;
9910
9911 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9912
9913 switch (dyn.d_tag)
9914 {
9915 case DT_PLTGOT:
9916 if (htab->is_vxworks)
9917 s = htab->sgotplt;
9918 else
9919 s = htab->plt;
9920 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9921 break;
9922
9923 case DT_PLTRELSZ:
9924 dyn.d_un.d_val = htab->relplt->size;
9925 break;
9926
9927 case DT_JMPREL:
9928 s = htab->relplt;
9929 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9930 break;
9931
9932 case DT_PPC_GOT:
9933 dyn.d_un.d_ptr = got;
9934 break;
9935
9936 case DT_RELASZ:
9937 if (htab->is_vxworks)
9938 {
9939 if (htab->relplt)
9940 dyn.d_un.d_ptr -= htab->relplt->size;
9941 break;
9942 }
9943 continue;
9944
9945 default:
9946 if (htab->is_vxworks
9947 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9948 break;
9949 continue;
9950 }
9951
9952 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9953 }
9954 }
9955
9956 if (htab->got != NULL)
9957 {
9958 if (htab->elf.hgot->root.u.def.section == htab->got
9959 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9960 {
9961 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9962
9963 p += htab->elf.hgot->root.u.def.value;
9964 if (htab->plt_type == PLT_OLD)
9965 {
9966 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9967 so that a function can easily find the address of
9968 _GLOBAL_OFFSET_TABLE_. */
9969 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9970 < htab->elf.hgot->root.u.def.section->size);
9971 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9972 }
9973
9974 if (sdyn != NULL)
9975 {
9976 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9977 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9978 < htab->elf.hgot->root.u.def.section->size);
9979 bfd_put_32 (output_bfd, val, p);
9980 }
9981 }
9982 else
9983 {
9984 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9985 htab->elf.hgot->root.root.string,
9986 (htab->sgotplt != NULL
9987 ? htab->sgotplt->name : htab->got->name));
9988 bfd_set_error (bfd_error_bad_value);
9989 ret = FALSE;
9990 }
9991
9992 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9993 }
9994
9995 /* Fill in the first entry in the VxWorks procedure linkage table. */
9996 if (splt && splt->size > 0)
9997 {
9998 /* Use the right PLT. */
9999 const bfd_vma *plt_entry = (info->shared
10000 ? ppc_elf_vxworks_pic_plt0_entry
10001 : ppc_elf_vxworks_plt0_entry);
10002
10003 if (!info->shared)
10004 {
10005 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10006
10007 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10008 splt->contents + 0);
10009 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10010 splt->contents + 4);
10011 }
10012 else
10013 {
10014 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10015 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10016 }
10017 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10018 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10019 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10020 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10021 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10022 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10023
10024 if (! info->shared)
10025 {
10026 Elf_Internal_Rela rela;
10027 bfd_byte *loc;
10028
10029 loc = htab->srelplt2->contents;
10030
10031 /* Output the @ha relocation for the first instruction. */
10032 rela.r_offset = (htab->plt->output_section->vma
10033 + htab->plt->output_offset
10034 + 2);
10035 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10036 rela.r_addend = 0;
10037 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10038 loc += sizeof (Elf32_External_Rela);
10039
10040 /* Output the @l relocation for the second instruction. */
10041 rela.r_offset = (htab->plt->output_section->vma
10042 + htab->plt->output_offset
10043 + 6);
10044 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10045 rela.r_addend = 0;
10046 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10047 loc += sizeof (Elf32_External_Rela);
10048
10049 /* Fix up the remaining relocations. They may have the wrong
10050 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10051 in which symbols were output. */
10052 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10053 {
10054 Elf_Internal_Rela rel;
10055
10056 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10057 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10058 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10059 loc += sizeof (Elf32_External_Rela);
10060
10061 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10062 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10063 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10064 loc += sizeof (Elf32_External_Rela);
10065
10066 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10067 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10068 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10069 loc += sizeof (Elf32_External_Rela);
10070 }
10071 }
10072 }
10073
10074 if (htab->glink != NULL
10075 && htab->glink->contents != NULL
10076 && htab->elf.dynamic_sections_created)
10077 {
10078 unsigned char *p;
10079 unsigned char *endp;
10080 bfd_vma res0;
10081 unsigned int i;
10082
10083 /*
10084 * PIC glink code is the following:
10085 *
10086 * # ith PLT code stub.
10087 * addis 11,30,(plt+(i-1)*4-got)@ha
10088 * lwz 11,(plt+(i-1)*4-got)@l(11)
10089 * mtctr 11
10090 * bctr
10091 *
10092 * # A table of branches, one for each plt entry.
10093 * # The idea is that the plt call stub loads ctr and r11 with these
10094 * # addresses, so (r11 - res_0) gives the plt index * 4.
10095 * res_0: b PLTresolve
10096 * res_1: b PLTresolve
10097 * .
10098 * # Some number of entries towards the end can be nops
10099 * res_n_m3: nop
10100 * res_n_m2: nop
10101 * res_n_m1:
10102 *
10103 * PLTresolve:
10104 * addis 11,11,(1f-res_0)@ha
10105 * mflr 0
10106 * bcl 20,31,1f
10107 * 1: addi 11,11,(1b-res_0)@l
10108 * mflr 12
10109 * mtlr 0
10110 * sub 11,11,12 # r11 = index * 4
10111 * addis 12,12,(got+4-1b)@ha
10112 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10113 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10114 * mtctr 0
10115 * add 0,11,11
10116 * add 11,0,11 # r11 = index * 12 = reloc offset.
10117 * bctr
10118 */
10119 static const unsigned int pic_plt_resolve[] =
10120 {
10121 ADDIS_11_11,
10122 MFLR_0,
10123 BCL_20_31,
10124 ADDI_11_11,
10125 MFLR_12,
10126 MTLR_0,
10127 SUB_11_11_12,
10128 ADDIS_12_12,
10129 LWZ_0_12,
10130 LWZ_12_12,
10131 MTCTR_0,
10132 ADD_0_11_11,
10133 ADD_11_0_11,
10134 BCTR,
10135 NOP,
10136 NOP
10137 };
10138
10139 /*
10140 * Non-PIC glink code is a little simpler.
10141 *
10142 * # ith PLT code stub.
10143 * lis 11,(plt+(i-1)*4)@ha
10144 * lwz 11,(plt+(i-1)*4)@l(11)
10145 * mtctr 11
10146 * bctr
10147 *
10148 * The branch table is the same, then comes
10149 *
10150 * PLTresolve:
10151 * lis 12,(got+4)@ha
10152 * addis 11,11,(-res_0)@ha
10153 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10154 * addi 11,11,(-res_0)@l # r11 = index * 4
10155 * mtctr 0
10156 * add 0,11,11
10157 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10158 * add 11,0,11 # r11 = index * 12 = reloc offset.
10159 * bctr
10160 */
10161 static const unsigned int plt_resolve[] =
10162 {
10163 LIS_12,
10164 ADDIS_11_11,
10165 LWZ_0_12,
10166 ADDI_11_11,
10167 MTCTR_0,
10168 ADD_0_11_11,
10169 LWZ_12_12,
10170 ADD_11_0_11,
10171 BCTR,
10172 NOP,
10173 NOP,
10174 NOP,
10175 NOP,
10176 NOP,
10177 NOP,
10178 NOP
10179 };
10180
10181 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10182 abort ();
10183 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10184 abort ();
10185
10186 /* Build the branch table, one for each plt entry (less one),
10187 and perhaps some padding. */
10188 p = htab->glink->contents;
10189 p += htab->glink_pltresolve;
10190 endp = htab->glink->contents;
10191 endp += htab->glink->size - GLINK_PLTRESOLVE;
10192 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10193 {
10194 bfd_put_32 (output_bfd, B + endp - p, p);
10195 p += 4;
10196 }
10197 while (p < endp)
10198 {
10199 bfd_put_32 (output_bfd, NOP, p);
10200 p += 4;
10201 }
10202
10203 res0 = (htab->glink_pltresolve
10204 + htab->glink->output_section->vma
10205 + htab->glink->output_offset);
10206
10207 if (htab->params->ppc476_workaround)
10208 {
10209 /* Ensure that a call stub at the end of a page doesn't
10210 result in prefetch over the end of the page into the
10211 glink branch table. */
10212 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10213 bfd_vma page_addr;
10214 bfd_vma glink_start = (htab->glink->output_section->vma
10215 + htab->glink->output_offset);
10216
10217 for (page_addr = res0 & -pagesize;
10218 page_addr > glink_start;
10219 page_addr -= pagesize)
10220 {
10221 /* We have a plt call stub that may need fixing. */
10222 bfd_byte *loc;
10223 unsigned int insn;
10224
10225 loc = htab->glink->contents + page_addr - 4 - glink_start;
10226 insn = bfd_get_32 (output_bfd, loc);
10227 if (insn == BCTR)
10228 {
10229 /* By alignment, we know that there must be at least
10230 one other call stub before this one. */
10231 insn = bfd_get_32 (output_bfd, loc - 16);
10232 if (insn == BCTR)
10233 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10234 else
10235 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10236 }
10237 }
10238 }
10239
10240 /* Last comes the PLTresolve stub. */
10241 if (info->shared)
10242 {
10243 bfd_vma bcl;
10244
10245 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10246 {
10247 unsigned int insn = pic_plt_resolve[i];
10248
10249 if (htab->params->ppc476_workaround && insn == NOP)
10250 insn = BA + 0;
10251 bfd_put_32 (output_bfd, insn, p);
10252 p += 4;
10253 }
10254 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10255
10256 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10257 + htab->glink->output_section->vma
10258 + htab->glink->output_offset);
10259
10260 bfd_put_32 (output_bfd,
10261 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10262 bfd_put_32 (output_bfd,
10263 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10264 bfd_put_32 (output_bfd,
10265 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10266 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10267 {
10268 bfd_put_32 (output_bfd,
10269 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10270 bfd_put_32 (output_bfd,
10271 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10272 }
10273 else
10274 {
10275 bfd_put_32 (output_bfd,
10276 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10277 bfd_put_32 (output_bfd,
10278 LWZ_12_12 + 4, p + 9*4);
10279 }
10280 }
10281 else
10282 {
10283 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10284 {
10285 unsigned int insn = plt_resolve[i];
10286
10287 if (htab->params->ppc476_workaround && insn == NOP)
10288 insn = BA + 0;
10289 bfd_put_32 (output_bfd, insn, p);
10290 p += 4;
10291 }
10292 p -= 4 * ARRAY_SIZE (plt_resolve);
10293
10294 bfd_put_32 (output_bfd,
10295 LIS_12 + PPC_HA (got + 4), p + 0*4);
10296 bfd_put_32 (output_bfd,
10297 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10298 bfd_put_32 (output_bfd,
10299 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10300 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10301 {
10302 bfd_put_32 (output_bfd,
10303 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10304 bfd_put_32 (output_bfd,
10305 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10306 }
10307 else
10308 {
10309 bfd_put_32 (output_bfd,
10310 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10311 bfd_put_32 (output_bfd,
10312 LWZ_12_12 + 4, p + 6*4);
10313 }
10314 }
10315 }
10316
10317 if (htab->glink_eh_frame != NULL
10318 && htab->glink_eh_frame->contents != NULL)
10319 {
10320 unsigned char *p = htab->glink_eh_frame->contents;
10321 bfd_vma val;
10322
10323 p += sizeof (glink_eh_frame_cie);
10324 /* FDE length. */
10325 p += 4;
10326 /* CIE pointer. */
10327 p += 4;
10328 /* Offset to .glink. */
10329 val = (htab->glink->output_section->vma
10330 + htab->glink->output_offset);
10331 val -= (htab->glink_eh_frame->output_section->vma
10332 + htab->glink_eh_frame->output_offset);
10333 val -= p - htab->glink_eh_frame->contents;
10334 bfd_put_32 (htab->elf.dynobj, val, p);
10335
10336 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10337 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10338 htab->glink_eh_frame,
10339 htab->glink_eh_frame->contents))
10340 return FALSE;
10341 }
10342
10343 return ret;
10344 }
10345 \f
10346 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10347 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10348 #define TARGET_BIG_SYM powerpc_elf32_vec
10349 #define TARGET_BIG_NAME "elf32-powerpc"
10350 #define ELF_ARCH bfd_arch_powerpc
10351 #define ELF_TARGET_ID PPC32_ELF_DATA
10352 #define ELF_MACHINE_CODE EM_PPC
10353 #ifdef __QNXTARGET__
10354 #define ELF_MAXPAGESIZE 0x1000
10355 #define ELF_COMMONPAGESIZE 0x1000
10356 #else
10357 #define ELF_MAXPAGESIZE 0x10000
10358 #define ELF_COMMONPAGESIZE 0x10000
10359 #endif
10360 #define ELF_MINPAGESIZE 0x1000
10361 #define elf_info_to_howto ppc_elf_info_to_howto
10362
10363 #ifdef EM_CYGNUS_POWERPC
10364 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10365 #endif
10366
10367 #ifdef EM_PPC_OLD
10368 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10369 #endif
10370
10371 #define elf_backend_plt_not_loaded 1
10372 #define elf_backend_can_gc_sections 1
10373 #define elf_backend_can_refcount 1
10374 #define elf_backend_rela_normal 1
10375 #define elf_backend_caches_rawsize 1
10376
10377 #define bfd_elf32_mkobject ppc_elf_mkobject
10378 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10379 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10380 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10381 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10382 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10383 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10384 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10385
10386 #define elf_backend_object_p ppc_elf_object_p
10387 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10388 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10389 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10390 #define elf_backend_relocate_section ppc_elf_relocate_section
10391 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10392 #define elf_backend_check_relocs ppc_elf_check_relocs
10393 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10394 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10395 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10396 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10397 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10398 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10399 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10400 #define elf_backend_fake_sections ppc_elf_fake_sections
10401 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10402 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10403 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10404 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10405 #define elf_backend_write_core_note ppc_elf_write_core_note
10406 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10407 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10408 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10409 #define elf_backend_write_section ppc_elf_write_section
10410 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10411 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10412 #define elf_backend_action_discarded ppc_elf_action_discarded
10413 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10414 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10415 #define elf_backend_section_processing ppc_elf_section_processing
10416
10417 #include "elf32-target.h"
10418
10419 /* FreeBSD Target */
10420
10421 #undef TARGET_LITTLE_SYM
10422 #undef TARGET_LITTLE_NAME
10423
10424 #undef TARGET_BIG_SYM
10425 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10426 #undef TARGET_BIG_NAME
10427 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10428
10429 #undef ELF_OSABI
10430 #define ELF_OSABI ELFOSABI_FREEBSD
10431
10432 #undef elf32_bed
10433 #define elf32_bed elf32_powerpc_fbsd_bed
10434
10435 #include "elf32-target.h"
10436
10437 /* VxWorks Target */
10438
10439 #undef TARGET_LITTLE_SYM
10440 #undef TARGET_LITTLE_NAME
10441
10442 #undef TARGET_BIG_SYM
10443 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10444 #undef TARGET_BIG_NAME
10445 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10446
10447 #undef ELF_OSABI
10448
10449 /* VxWorks uses the elf default section flags for .plt. */
10450 static const struct bfd_elf_special_section *
10451 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10452 {
10453 if (sec->name == NULL)
10454 return NULL;
10455
10456 if (strcmp (sec->name, ".plt") == 0)
10457 return _bfd_elf_get_sec_type_attr (abfd, sec);
10458
10459 return ppc_elf_get_sec_type_attr (abfd, sec);
10460 }
10461
10462 /* Like ppc_elf_link_hash_table_create, but overrides
10463 appropriately for VxWorks. */
10464 static struct bfd_link_hash_table *
10465 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10466 {
10467 struct bfd_link_hash_table *ret;
10468
10469 ret = ppc_elf_link_hash_table_create (abfd);
10470 if (ret)
10471 {
10472 struct ppc_elf_link_hash_table *htab
10473 = (struct ppc_elf_link_hash_table *)ret;
10474 htab->is_vxworks = 1;
10475 htab->plt_type = PLT_VXWORKS;
10476 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10477 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10478 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10479 }
10480 return ret;
10481 }
10482
10483 /* Tweak magic VxWorks symbols as they are loaded. */
10484 static bfd_boolean
10485 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10486 struct bfd_link_info *info,
10487 Elf_Internal_Sym *sym,
10488 const char **namep ATTRIBUTE_UNUSED,
10489 flagword *flagsp ATTRIBUTE_UNUSED,
10490 asection **secp,
10491 bfd_vma *valp)
10492 {
10493 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10494 valp))
10495 return FALSE;
10496
10497 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10498 }
10499
10500 static void
10501 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10502 {
10503 ppc_elf_final_write_processing(abfd, linker);
10504 elf_vxworks_final_write_processing(abfd, linker);
10505 }
10506
10507 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10508 define it. */
10509 #undef elf_backend_want_plt_sym
10510 #define elf_backend_want_plt_sym 1
10511 #undef elf_backend_want_got_plt
10512 #define elf_backend_want_got_plt 1
10513 #undef elf_backend_got_symbol_offset
10514 #define elf_backend_got_symbol_offset 0
10515 #undef elf_backend_plt_not_loaded
10516 #define elf_backend_plt_not_loaded 0
10517 #undef elf_backend_plt_readonly
10518 #define elf_backend_plt_readonly 1
10519 #undef elf_backend_got_header_size
10520 #define elf_backend_got_header_size 12
10521
10522 #undef bfd_elf32_get_synthetic_symtab
10523
10524 #undef bfd_elf32_bfd_link_hash_table_create
10525 #define bfd_elf32_bfd_link_hash_table_create \
10526 ppc_elf_vxworks_link_hash_table_create
10527 #undef elf_backend_add_symbol_hook
10528 #define elf_backend_add_symbol_hook \
10529 ppc_elf_vxworks_add_symbol_hook
10530 #undef elf_backend_link_output_symbol_hook
10531 #define elf_backend_link_output_symbol_hook \
10532 elf_vxworks_link_output_symbol_hook
10533 #undef elf_backend_final_write_processing
10534 #define elf_backend_final_write_processing \
10535 ppc_elf_vxworks_final_write_processing
10536 #undef elf_backend_get_sec_type_attr
10537 #define elf_backend_get_sec_type_attr \
10538 ppc_elf_vxworks_get_sec_type_attr
10539 #undef elf_backend_emit_relocs
10540 #define elf_backend_emit_relocs \
10541 elf_vxworks_emit_relocs
10542
10543 #undef elf32_bed
10544 #define elf32_bed ppc_elf_vxworks_bed
10545 #undef elf_backend_post_process_headers
10546
10547 #include "elf32-target.h"
GDB Binutils - Deliverables
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