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Taking an undefined function's address in an executable
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2014 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831 \f
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 /* Initialize howto table if not already done. */
2023 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2024 ppc_elf_howto_init ();
2025
2026 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2027 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2028
2029 /* Just because the above assert didn't trigger doesn't mean that
2030 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2031 if (!cache_ptr->howto)
2032 {
2033 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2034 abfd, ELF32_R_TYPE (dst->r_info));
2035 bfd_set_error (bfd_error_bad_value);
2036
2037 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2038 }
2039 }
2040
2041 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2042
2043 static bfd_reloc_status_type
2044 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2045 arelent *reloc_entry,
2046 asymbol *symbol,
2047 void *data ATTRIBUTE_UNUSED,
2048 asection *input_section,
2049 bfd *output_bfd,
2050 char **error_message ATTRIBUTE_UNUSED)
2051 {
2052 bfd_vma relocation;
2053
2054 if (output_bfd != NULL)
2055 {
2056 reloc_entry->address += input_section->output_offset;
2057 return bfd_reloc_ok;
2058 }
2059
2060 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2061 return bfd_reloc_outofrange;
2062
2063 if (bfd_is_com_section (symbol->section))
2064 relocation = 0;
2065 else
2066 relocation = symbol->value;
2067
2068 relocation += symbol->section->output_section->vma;
2069 relocation += symbol->section->output_offset;
2070 relocation += reloc_entry->addend;
2071 if (reloc_entry->howto->pc_relative)
2072 relocation -= reloc_entry->address;
2073
2074 reloc_entry->addend += (relocation & 0x8000) << 1;
2075
2076 return bfd_reloc_continue;
2077 }
2078
2079 static bfd_reloc_status_type
2080 ppc_elf_unhandled_reloc (bfd *abfd,
2081 arelent *reloc_entry,
2082 asymbol *symbol,
2083 void *data,
2084 asection *input_section,
2085 bfd *output_bfd,
2086 char **error_message)
2087 {
2088 /* If this is a relocatable link (output_bfd test tells us), just
2089 call the generic function. Any adjustment will be done at final
2090 link time. */
2091 if (output_bfd != NULL)
2092 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2093 input_section, output_bfd, error_message);
2094
2095 if (error_message != NULL)
2096 {
2097 static char buf[60];
2098 sprintf (buf, _("generic linker can't handle %s"),
2099 reloc_entry->howto->name);
2100 *error_message = buf;
2101 }
2102 return bfd_reloc_dangerous;
2103 }
2104 \f
2105 /* Sections created by the linker. */
2106
2107 typedef struct elf_linker_section
2108 {
2109 /* Pointer to the bfd section. */
2110 asection *section;
2111 /* Section name. */
2112 const char *name;
2113 /* Associated bss section name. */
2114 const char *bss_name;
2115 /* Associated symbol name. */
2116 const char *sym_name;
2117 /* Associated symbol. */
2118 struct elf_link_hash_entry *sym;
2119 } elf_linker_section_t;
2120
2121 /* Linked list of allocated pointer entries. This hangs off of the
2122 symbol lists, and provides allows us to return different pointers,
2123 based on different addend's. */
2124
2125 typedef struct elf_linker_section_pointers
2126 {
2127 /* next allocated pointer for this symbol */
2128 struct elf_linker_section_pointers *next;
2129 /* offset of pointer from beginning of section */
2130 bfd_vma offset;
2131 /* addend used */
2132 bfd_vma addend;
2133 /* which linker section this is */
2134 elf_linker_section_t *lsect;
2135 } elf_linker_section_pointers_t;
2136
2137 struct ppc_elf_obj_tdata
2138 {
2139 struct elf_obj_tdata elf;
2140
2141 /* A mapping from local symbols to offsets into the various linker
2142 sections added. This is index by the symbol index. */
2143 elf_linker_section_pointers_t **linker_section_pointers;
2144
2145 /* Flags used to auto-detect plt type. */
2146 unsigned int makes_plt_call : 1;
2147 unsigned int has_rel16 : 1;
2148 };
2149
2150 #define ppc_elf_tdata(bfd) \
2151 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2152
2153 #define elf_local_ptr_offsets(bfd) \
2154 (ppc_elf_tdata (bfd)->linker_section_pointers)
2155
2156 #define is_ppc_elf(bfd) \
2157 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2158 && elf_object_id (bfd) == PPC32_ELF_DATA)
2159
2160 /* Override the generic function because we store some extras. */
2161
2162 static bfd_boolean
2163 ppc_elf_mkobject (bfd *abfd)
2164 {
2165 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2166 PPC32_ELF_DATA);
2167 }
2168
2169 /* Fix bad default arch selected for a 32 bit input bfd when the
2170 default is 64 bit. */
2171
2172 static bfd_boolean
2173 ppc_elf_object_p (bfd *abfd)
2174 {
2175 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2176 {
2177 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2178
2179 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2180 {
2181 /* Relies on arch after 64 bit default being 32 bit default. */
2182 abfd->arch_info = abfd->arch_info->next;
2183 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2184 }
2185 }
2186 return TRUE;
2187 }
2188
2189 /* Function to set whether a module needs the -mrelocatable bit set. */
2190
2191 static bfd_boolean
2192 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2193 {
2194 BFD_ASSERT (!elf_flags_init (abfd)
2195 || elf_elfheader (abfd)->e_flags == flags);
2196
2197 elf_elfheader (abfd)->e_flags = flags;
2198 elf_flags_init (abfd) = TRUE;
2199 return TRUE;
2200 }
2201
2202 /* Support for core dump NOTE sections. */
2203
2204 static bfd_boolean
2205 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2206 {
2207 int offset;
2208 unsigned int size;
2209
2210 switch (note->descsz)
2211 {
2212 default:
2213 return FALSE;
2214
2215 case 268: /* Linux/PPC. */
2216 /* pr_cursig */
2217 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2218
2219 /* pr_pid */
2220 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2221
2222 /* pr_reg */
2223 offset = 72;
2224 size = 192;
2225
2226 break;
2227 }
2228
2229 /* Make a ".reg/999" section. */
2230 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2231 size, note->descpos + offset);
2232 }
2233
2234 static bfd_boolean
2235 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2236 {
2237 switch (note->descsz)
2238 {
2239 default:
2240 return FALSE;
2241
2242 case 128: /* Linux/PPC elf_prpsinfo. */
2243 elf_tdata (abfd)->core->pid
2244 = bfd_get_32 (abfd, note->descdata + 16);
2245 elf_tdata (abfd)->core->program
2246 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2247 elf_tdata (abfd)->core->command
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2249 }
2250
2251 /* Note that for some reason, a spurious space is tacked
2252 onto the end of the args in some (at least one anyway)
2253 implementations, so strip it off if it exists. */
2254
2255 {
2256 char *command = elf_tdata (abfd)->core->command;
2257 int n = strlen (command);
2258
2259 if (0 < n && command[n - 1] == ' ')
2260 command[n - 1] = '\0';
2261 }
2262
2263 return TRUE;
2264 }
2265
2266 char *
2267 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2268 const struct elf_internal_linux_prpsinfo *prpsinfo)
2269 {
2270 struct elf_external_ppc_linux_prpsinfo32 data;
2271
2272 memset (&data, 0, sizeof (data));
2273 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2274
2275 return elfcore_write_note (abfd, buf, bufsiz,
2276 "CORE", NT_PRPSINFO, &data, sizeof (data));
2277 }
2278
2279 static char *
2280 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2281 {
2282 switch (note_type)
2283 {
2284 default:
2285 return NULL;
2286
2287 case NT_PRPSINFO:
2288 {
2289 char data[128];
2290 va_list ap;
2291
2292 va_start (ap, note_type);
2293 memset (data, 0, sizeof (data));
2294 strncpy (data + 32, va_arg (ap, const char *), 16);
2295 strncpy (data + 48, va_arg (ap, const char *), 80);
2296 va_end (ap);
2297 return elfcore_write_note (abfd, buf, bufsiz,
2298 "CORE", note_type, data, sizeof (data));
2299 }
2300
2301 case NT_PRSTATUS:
2302 {
2303 char data[268];
2304 va_list ap;
2305 long pid;
2306 int cursig;
2307 const void *greg;
2308
2309 va_start (ap, note_type);
2310 memset (data, 0, 72);
2311 pid = va_arg (ap, long);
2312 bfd_put_32 (abfd, pid, data + 24);
2313 cursig = va_arg (ap, int);
2314 bfd_put_16 (abfd, cursig, data + 12);
2315 greg = va_arg (ap, const void *);
2316 memcpy (data + 72, greg, 192);
2317 memset (data + 264, 0, 4);
2318 va_end (ap);
2319 return elfcore_write_note (abfd, buf, bufsiz,
2320 "CORE", note_type, data, sizeof (data));
2321 }
2322 }
2323 }
2324
2325 static flagword
2326 ppc_elf_lookup_section_flags (char *flag_name)
2327 {
2328
2329 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2330 return SHF_PPC_VLE;
2331
2332 return 0;
2333 }
2334
2335 /* Add the VLE flag if required. */
2336
2337 bfd_boolean
2338 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2339 {
2340 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2341 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2342 shdr->sh_flags |= SHF_PPC_VLE;
2343
2344 return TRUE;
2345 }
2346
2347 /* Return address for Ith PLT stub in section PLT, for relocation REL
2348 or (bfd_vma) -1 if it should not be included. */
2349
2350 static bfd_vma
2351 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2352 const asection *plt ATTRIBUTE_UNUSED,
2353 const arelent *rel)
2354 {
2355 return rel->address;
2356 }
2357
2358 /* Handle a PowerPC specific section when reading an object file. This
2359 is called when bfd_section_from_shdr finds a section with an unknown
2360 type. */
2361
2362 static bfd_boolean
2363 ppc_elf_section_from_shdr (bfd *abfd,
2364 Elf_Internal_Shdr *hdr,
2365 const char *name,
2366 int shindex)
2367 {
2368 asection *newsect;
2369 flagword flags;
2370
2371 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2372 return FALSE;
2373
2374 newsect = hdr->bfd_section;
2375 flags = bfd_get_section_flags (abfd, newsect);
2376 if (hdr->sh_flags & SHF_EXCLUDE)
2377 flags |= SEC_EXCLUDE;
2378
2379 if (hdr->sh_type == SHT_ORDERED)
2380 flags |= SEC_SORT_ENTRIES;
2381
2382 bfd_set_section_flags (abfd, newsect, flags);
2383 return TRUE;
2384 }
2385
2386 /* Set up any other section flags and such that may be necessary. */
2387
2388 static bfd_boolean
2389 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2390 Elf_Internal_Shdr *shdr,
2391 asection *asect)
2392 {
2393 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2394 shdr->sh_type = SHT_ORDERED;
2395
2396 return TRUE;
2397 }
2398
2399 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2400 need to bump up the number of section headers. */
2401
2402 static int
2403 ppc_elf_additional_program_headers (bfd *abfd,
2404 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2405 {
2406 asection *s;
2407 int ret = 0;
2408
2409 s = bfd_get_section_by_name (abfd, ".sbss2");
2410 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2411 ++ret;
2412
2413 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2414 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2415 ++ret;
2416
2417 return ret;
2418 }
2419
2420 /* Modify the segment map for VLE executables. */
2421
2422 bfd_boolean
2423 ppc_elf_modify_segment_map (bfd *abfd,
2424 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2425 {
2426 struct elf_segment_map *m, *n;
2427 bfd_size_type amt;
2428 unsigned int j, k;
2429 bfd_boolean sect0_vle, sectj_vle;
2430
2431 /* At this point in the link, output sections have already been sorted by
2432 LMA and assigned to segments. All that is left to do is to ensure
2433 there is no mixing of VLE & non-VLE sections in a text segment.
2434 If we find that case, we split the segment.
2435 We maintain the original output section order. */
2436
2437 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2438 {
2439 if (m->count == 0)
2440 continue;
2441
2442 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2443 for (j = 1; j < m->count; ++j)
2444 {
2445 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2446
2447 if (sectj_vle != sect0_vle)
2448 break;
2449 }
2450 if (j >= m->count)
2451 continue;
2452
2453 /* sections 0..j-1 stay in this (current) segment,
2454 the remainder are put in a new segment.
2455 The scan resumes with the new segment. */
2456
2457 /* Fix the new segment. */
2458 amt = sizeof (struct elf_segment_map);
2459 amt += (m->count - j - 1) * sizeof (asection *);
2460 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2461 if (n == NULL)
2462 return FALSE;
2463
2464 n->p_type = PT_LOAD;
2465 n->p_flags = PF_X | PF_R;
2466 if (sectj_vle)
2467 n->p_flags |= PF_PPC_VLE;
2468 n->count = m->count - j;
2469 for (k = 0; k < n->count; ++k)
2470 {
2471 n->sections[k] = m->sections[j+k];
2472 m->sections[j+k] = NULL;
2473 }
2474 n->next = m->next;
2475 m->next = n;
2476
2477 /* Fix the current segment */
2478 m->count = j;
2479 }
2480
2481 return TRUE;
2482 }
2483
2484 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2485 .PPC.EMB.sbss0 a normal section, and not a bss section so
2486 that the linker doesn't crater when trying to make more than
2487 2 sections. */
2488
2489 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2490 {
2491 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2492 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2493 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2494 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2497 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2498 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2500 { NULL, 0, 0, 0, 0 }
2501 };
2502
2503 /* This is what we want for new plt/got. */
2504 static struct bfd_elf_special_section ppc_alt_plt =
2505 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2506
2507 static const struct bfd_elf_special_section *
2508 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2509 {
2510 const struct bfd_elf_special_section *ssect;
2511
2512 /* See if this is one of the special sections. */
2513 if (sec->name == NULL)
2514 return NULL;
2515
2516 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2517 sec->use_rela_p);
2518 if (ssect != NULL)
2519 {
2520 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2521 ssect = &ppc_alt_plt;
2522 return ssect;
2523 }
2524
2525 return _bfd_elf_get_sec_type_attr (abfd, sec);
2526 }
2527 \f
2528 /* Very simple linked list structure for recording apuinfo values. */
2529 typedef struct apuinfo_list
2530 {
2531 struct apuinfo_list *next;
2532 unsigned long value;
2533 }
2534 apuinfo_list;
2535
2536 static apuinfo_list *head;
2537 static bfd_boolean apuinfo_set;
2538
2539 static void
2540 apuinfo_list_init (void)
2541 {
2542 head = NULL;
2543 apuinfo_set = FALSE;
2544 }
2545
2546 static void
2547 apuinfo_list_add (unsigned long value)
2548 {
2549 apuinfo_list *entry = head;
2550
2551 while (entry != NULL)
2552 {
2553 if (entry->value == value)
2554 return;
2555 entry = entry->next;
2556 }
2557
2558 entry = bfd_malloc (sizeof (* entry));
2559 if (entry == NULL)
2560 return;
2561
2562 entry->value = value;
2563 entry->next = head;
2564 head = entry;
2565 }
2566
2567 static unsigned
2568 apuinfo_list_length (void)
2569 {
2570 apuinfo_list *entry;
2571 unsigned long count;
2572
2573 for (entry = head, count = 0;
2574 entry;
2575 entry = entry->next)
2576 ++ count;
2577
2578 return count;
2579 }
2580
2581 static inline unsigned long
2582 apuinfo_list_element (unsigned long number)
2583 {
2584 apuinfo_list * entry;
2585
2586 for (entry = head;
2587 entry && number --;
2588 entry = entry->next)
2589 ;
2590
2591 return entry ? entry->value : 0;
2592 }
2593
2594 static void
2595 apuinfo_list_finish (void)
2596 {
2597 apuinfo_list *entry;
2598
2599 for (entry = head; entry;)
2600 {
2601 apuinfo_list *next = entry->next;
2602 free (entry);
2603 entry = next;
2604 }
2605
2606 head = NULL;
2607 }
2608
2609 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2610 #define APUINFO_LABEL "APUinfo"
2611
2612 /* Scan the input BFDs and create a linked list of
2613 the APUinfo values that will need to be emitted. */
2614
2615 static void
2616 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2617 {
2618 bfd *ibfd;
2619 asection *asec;
2620 char *buffer = NULL;
2621 bfd_size_type largest_input_size = 0;
2622 unsigned i;
2623 unsigned long length;
2624 const char *error_message = NULL;
2625
2626 if (link_info == NULL)
2627 return;
2628
2629 apuinfo_list_init ();
2630
2631 /* Read in the input sections contents. */
2632 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2633 {
2634 unsigned long datum;
2635
2636 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2637 if (asec == NULL)
2638 continue;
2639
2640 error_message = _("corrupt %s section in %B");
2641 length = asec->size;
2642 if (length < 20)
2643 goto fail;
2644
2645 apuinfo_set = TRUE;
2646 if (largest_input_size < asec->size)
2647 {
2648 if (buffer)
2649 free (buffer);
2650 largest_input_size = asec->size;
2651 buffer = bfd_malloc (largest_input_size);
2652 if (!buffer)
2653 return;
2654 }
2655
2656 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2657 || (bfd_bread (buffer, length, ibfd) != length))
2658 {
2659 error_message = _("unable to read in %s section from %B");
2660 goto fail;
2661 }
2662
2663 /* Verify the contents of the header. Note - we have to
2664 extract the values this way in order to allow for a
2665 host whose endian-ness is different from the target. */
2666 datum = bfd_get_32 (ibfd, buffer);
2667 if (datum != sizeof APUINFO_LABEL)
2668 goto fail;
2669
2670 datum = bfd_get_32 (ibfd, buffer + 8);
2671 if (datum != 0x2)
2672 goto fail;
2673
2674 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2675 goto fail;
2676
2677 /* Get the number of bytes used for apuinfo entries. */
2678 datum = bfd_get_32 (ibfd, buffer + 4);
2679 if (datum + 20 != length)
2680 goto fail;
2681
2682 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2683 for (i = 0; i < datum; i += 4)
2684 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2685 }
2686
2687 error_message = NULL;
2688
2689 if (apuinfo_set)
2690 {
2691 /* Compute the size of the output section. */
2692 unsigned num_entries = apuinfo_list_length ();
2693
2694 /* Set the output section size, if it exists. */
2695 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2696
2697 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2698 {
2699 ibfd = abfd;
2700 error_message = _("warning: unable to set size of %s section in %B");
2701 }
2702 }
2703
2704 fail:
2705 if (buffer)
2706 free (buffer);
2707
2708 if (error_message)
2709 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2710 }
2711
2712 /* Prevent the output section from accumulating the input sections'
2713 contents. We have already stored this in our linked list structure. */
2714
2715 static bfd_boolean
2716 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2717 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2718 asection *asec,
2719 bfd_byte *contents ATTRIBUTE_UNUSED)
2720 {
2721 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2722 }
2723
2724 /* Finally we can generate the output section. */
2725
2726 static void
2727 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2728 {
2729 bfd_byte *buffer;
2730 asection *asec;
2731 unsigned i;
2732 unsigned num_entries;
2733 bfd_size_type length;
2734
2735 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2736 if (asec == NULL)
2737 return;
2738
2739 if (!apuinfo_set)
2740 return;
2741
2742 length = asec->size;
2743 if (length < 20)
2744 return;
2745
2746 buffer = bfd_malloc (length);
2747 if (buffer == NULL)
2748 {
2749 (*_bfd_error_handler)
2750 (_("failed to allocate space for new APUinfo section."));
2751 return;
2752 }
2753
2754 /* Create the apuinfo header. */
2755 num_entries = apuinfo_list_length ();
2756 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2757 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2758 bfd_put_32 (abfd, 0x2, buffer + 8);
2759 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2760
2761 length = 20;
2762 for (i = 0; i < num_entries; i++)
2763 {
2764 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2765 length += 4;
2766 }
2767
2768 if (length != asec->size)
2769 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2770
2771 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2772 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2773
2774 free (buffer);
2775
2776 apuinfo_list_finish ();
2777 }
2778 \f
2779 static bfd_boolean
2780 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2781 {
2782 bfd_byte buf[GLINK_ENTRY_SIZE];
2783
2784 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2785 return FALSE;
2786
2787 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2788 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2789 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2790 && bfd_get_32 (abfd, buf + 12) == BCTR);
2791 }
2792
2793 static bfd_boolean
2794 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2795 {
2796 bfd_vma vma = *(bfd_vma *) ptr;
2797 return ((section->flags & SEC_ALLOC) != 0
2798 && section->vma <= vma
2799 && vma < section->vma + section->size);
2800 }
2801
2802 static long
2803 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2804 long dynsymcount, asymbol **dynsyms,
2805 asymbol **ret)
2806 {
2807 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2808 asection *plt, *relplt, *dynamic, *glink;
2809 bfd_vma glink_vma = 0;
2810 bfd_vma resolv_vma = 0;
2811 bfd_vma stub_vma;
2812 asymbol *s;
2813 arelent *p;
2814 long count, i;
2815 size_t size;
2816 char *names;
2817 bfd_byte buf[4];
2818
2819 *ret = NULL;
2820
2821 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2822 return 0;
2823
2824 if (dynsymcount <= 0)
2825 return 0;
2826
2827 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2828 if (relplt == NULL)
2829 return 0;
2830
2831 plt = bfd_get_section_by_name (abfd, ".plt");
2832 if (plt == NULL)
2833 return 0;
2834
2835 /* Call common code to handle old-style executable PLTs. */
2836 if (elf_section_flags (plt) & SHF_EXECINSTR)
2837 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2838 dynsymcount, dynsyms, ret);
2839
2840 /* If this object was prelinked, the prelinker stored the address
2841 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2842 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2843 if (dynamic != NULL)
2844 {
2845 bfd_byte *dynbuf, *extdyn, *extdynend;
2846 size_t extdynsize;
2847 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2848
2849 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2850 return -1;
2851
2852 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2853 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2854
2855 extdyn = dynbuf;
2856 extdynend = extdyn + dynamic->size;
2857 for (; extdyn < extdynend; extdyn += extdynsize)
2858 {
2859 Elf_Internal_Dyn dyn;
2860 (*swap_dyn_in) (abfd, extdyn, &dyn);
2861
2862 if (dyn.d_tag == DT_NULL)
2863 break;
2864
2865 if (dyn.d_tag == DT_PPC_GOT)
2866 {
2867 unsigned int g_o_t = dyn.d_un.d_val;
2868 asection *got = bfd_get_section_by_name (abfd, ".got");
2869 if (got != NULL
2870 && bfd_get_section_contents (abfd, got, buf,
2871 g_o_t - got->vma + 4, 4))
2872 glink_vma = bfd_get_32 (abfd, buf);
2873 break;
2874 }
2875 }
2876 free (dynbuf);
2877 }
2878
2879 /* Otherwise we read the first plt entry. */
2880 if (glink_vma == 0)
2881 {
2882 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2883 glink_vma = bfd_get_32 (abfd, buf);
2884 }
2885
2886 if (glink_vma == 0)
2887 return 0;
2888
2889 /* The .glink section usually does not survive the final
2890 link; search for the section (usually .text) where the
2891 glink stubs now reside. */
2892 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2893 if (glink == NULL)
2894 return 0;
2895
2896 /* Determine glink PLT resolver by reading the relative branch
2897 from the first glink stub. */
2898 if (bfd_get_section_contents (abfd, glink, buf,
2899 glink_vma - glink->vma, 4))
2900 {
2901 unsigned int insn = bfd_get_32 (abfd, buf);
2902
2903 /* The first glink stub may either branch to the resolver ... */
2904 insn ^= B;
2905 if ((insn & ~0x3fffffc) == 0)
2906 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2907
2908 /* ... or fall through a bunch of NOPs. */
2909 else if ((insn ^ B ^ NOP) == 0)
2910 for (i = 4;
2911 bfd_get_section_contents (abfd, glink, buf,
2912 glink_vma - glink->vma + i, 4);
2913 i += 4)
2914 if (bfd_get_32 (abfd, buf) != NOP)
2915 {
2916 resolv_vma = glink_vma + i;
2917 break;
2918 }
2919 }
2920
2921 count = relplt->size / sizeof (Elf32_External_Rela);
2922 stub_vma = glink_vma - (bfd_vma) count * 16;
2923 /* If the stubs are those for -shared/-pie then we might have
2924 multiple stubs for each plt entry. If that is the case then
2925 there is no way to associate stubs with their plt entries short
2926 of figuring out the GOT pointer value used in the stub. */
2927 if (!is_nonpic_glink_stub (abfd, glink,
2928 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2929 return 0;
2930
2931 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2932 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2933 return -1;
2934
2935 size = count * sizeof (asymbol);
2936 p = relplt->relocation;
2937 for (i = 0; i < count; i++, p++)
2938 {
2939 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2940 if (p->addend != 0)
2941 size += sizeof ("+0x") - 1 + 8;
2942 }
2943
2944 size += sizeof (asymbol) + sizeof ("__glink");
2945
2946 if (resolv_vma)
2947 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2948
2949 s = *ret = bfd_malloc (size);
2950 if (s == NULL)
2951 return -1;
2952
2953 names = (char *) (s + count + 1 + (resolv_vma != 0));
2954 p = relplt->relocation;
2955 for (i = 0; i < count; i++, p++)
2956 {
2957 size_t len;
2958
2959 *s = **p->sym_ptr_ptr;
2960 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2961 we are defining a symbol, ensure one of them is set. */
2962 if ((s->flags & BSF_LOCAL) == 0)
2963 s->flags |= BSF_GLOBAL;
2964 s->flags |= BSF_SYNTHETIC;
2965 s->section = glink;
2966 s->value = stub_vma - glink->vma;
2967 s->name = names;
2968 s->udata.p = NULL;
2969 len = strlen ((*p->sym_ptr_ptr)->name);
2970 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2971 names += len;
2972 if (p->addend != 0)
2973 {
2974 memcpy (names, "+0x", sizeof ("+0x") - 1);
2975 names += sizeof ("+0x") - 1;
2976 bfd_sprintf_vma (abfd, names, p->addend);
2977 names += strlen (names);
2978 }
2979 memcpy (names, "@plt", sizeof ("@plt"));
2980 names += sizeof ("@plt");
2981 ++s;
2982 stub_vma += 16;
2983 }
2984
2985 /* Add a symbol at the start of the glink branch table. */
2986 memset (s, 0, sizeof *s);
2987 s->the_bfd = abfd;
2988 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2989 s->section = glink;
2990 s->value = glink_vma - glink->vma;
2991 s->name = names;
2992 memcpy (names, "__glink", sizeof ("__glink"));
2993 names += sizeof ("__glink");
2994 s++;
2995 count++;
2996
2997 if (resolv_vma)
2998 {
2999 /* Add a symbol for the glink PLT resolver. */
3000 memset (s, 0, sizeof *s);
3001 s->the_bfd = abfd;
3002 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3003 s->section = glink;
3004 s->value = resolv_vma - glink->vma;
3005 s->name = names;
3006 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3007 names += sizeof ("__glink_PLTresolve");
3008 s++;
3009 count++;
3010 }
3011
3012 return count;
3013 }
3014 \f
3015 /* The following functions are specific to the ELF linker, while
3016 functions above are used generally. They appear in this file more
3017 or less in the order in which they are called. eg.
3018 ppc_elf_check_relocs is called early in the link process,
3019 ppc_elf_finish_dynamic_sections is one of the last functions
3020 called. */
3021
3022 /* Track PLT entries needed for a given symbol. We might need more
3023 than one glink entry per symbol when generating a pic binary. */
3024 struct plt_entry
3025 {
3026 struct plt_entry *next;
3027
3028 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3029 This field stores the offset into .got2 used to initialise the
3030 GOT pointer reg. It will always be at least 32768. (Current
3031 gcc always uses an offset of 32768, but ld -r will pack .got2
3032 sections together resulting in larger offsets). */
3033 bfd_vma addend;
3034
3035 /* The .got2 section. */
3036 asection *sec;
3037
3038 /* PLT refcount or offset. */
3039 union
3040 {
3041 bfd_signed_vma refcount;
3042 bfd_vma offset;
3043 } plt;
3044
3045 /* .glink stub offset. */
3046 bfd_vma glink_offset;
3047 };
3048
3049 /* Of those relocs that might be copied as dynamic relocs, this function
3050 selects those that must be copied when linking a shared library,
3051 even when the symbol is local. */
3052
3053 static int
3054 must_be_dyn_reloc (struct bfd_link_info *info,
3055 enum elf_ppc_reloc_type r_type)
3056 {
3057 switch (r_type)
3058 {
3059 default:
3060 return 1;
3061
3062 case R_PPC_REL24:
3063 case R_PPC_REL14:
3064 case R_PPC_REL14_BRTAKEN:
3065 case R_PPC_REL14_BRNTAKEN:
3066 case R_PPC_REL32:
3067 return 0;
3068
3069 case R_PPC_TPREL32:
3070 case R_PPC_TPREL16:
3071 case R_PPC_TPREL16_LO:
3072 case R_PPC_TPREL16_HI:
3073 case R_PPC_TPREL16_HA:
3074 return !info->executable;
3075 }
3076 }
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. */
3082 #define ELIMINATE_COPY_RELOCS 1
3083
3084 /* Used to track dynamic relocations for local symbols. */
3085 struct ppc_dyn_relocs
3086 {
3087 struct ppc_dyn_relocs *next;
3088
3089 /* The input section of the reloc. */
3090 asection *sec;
3091
3092 /* Total number of relocs copied for the input section. */
3093 unsigned int count : 31;
3094
3095 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3096 unsigned int ifunc : 1;
3097 };
3098
3099 /* PPC ELF linker hash entry. */
3100
3101 struct ppc_elf_link_hash_entry
3102 {
3103 struct elf_link_hash_entry elf;
3104
3105 /* If this symbol is used in the linker created sections, the processor
3106 specific backend uses this field to map the field into the offset
3107 from the beginning of the section. */
3108 elf_linker_section_pointers_t *linker_section_pointer;
3109
3110 /* Track dynamic relocs copied for this symbol. */
3111 struct elf_dyn_relocs *dyn_relocs;
3112
3113 /* Contexts in which symbol is used in the GOT (or TOC).
3114 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3115 corresponding relocs are encountered during check_relocs.
3116 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3117 indicate the corresponding GOT entry type is not needed. */
3118 #define TLS_GD 1 /* GD reloc. */
3119 #define TLS_LD 2 /* LD reloc. */
3120 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3121 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3122 #define TLS_TLS 16 /* Any TLS reloc. */
3123 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3124 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3125 char tls_mask;
3126
3127 /* Nonzero if we have seen a small data relocation referring to this
3128 symbol. */
3129 unsigned char has_sda_refs;
3130 };
3131
3132 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3133
3134 /* PPC ELF linker hash table. */
3135
3136 struct ppc_elf_link_hash_table
3137 {
3138 struct elf_link_hash_table elf;
3139
3140 /* Various options passed from the linker. */
3141 struct ppc_elf_params *params;
3142
3143 /* Short-cuts to get to dynamic linker sections. */
3144 asection *got;
3145 asection *relgot;
3146 asection *glink;
3147 asection *plt;
3148 asection *relplt;
3149 asection *iplt;
3150 asection *reliplt;
3151 asection *dynbss;
3152 asection *relbss;
3153 asection *dynsbss;
3154 asection *relsbss;
3155 elf_linker_section_t sdata[2];
3156 asection *sbss;
3157 asection *glink_eh_frame;
3158
3159 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3160 asection *srelplt2;
3161
3162 /* The .got.plt section (VxWorks only)*/
3163 asection *sgotplt;
3164
3165 /* Shortcut to __tls_get_addr. */
3166 struct elf_link_hash_entry *tls_get_addr;
3167
3168 /* The bfd that forced an old-style PLT. */
3169 bfd *old_bfd;
3170
3171 /* TLS local dynamic got entry handling. */
3172 union {
3173 bfd_signed_vma refcount;
3174 bfd_vma offset;
3175 } tlsld_got;
3176
3177 /* Offset of branch table to PltResolve function in glink. */
3178 bfd_vma glink_pltresolve;
3179
3180 /* Size of reserved GOT entries. */
3181 unsigned int got_header_size;
3182 /* Non-zero if allocating the header left a gap. */
3183 unsigned int got_gap;
3184
3185 /* The type of PLT we have chosen to use. */
3186 enum ppc_elf_plt_type plt_type;
3187
3188 /* True if the target system is VxWorks. */
3189 unsigned int is_vxworks:1;
3190
3191 /* The size of PLT entries. */
3192 int plt_entry_size;
3193 /* The distance between adjacent PLT slots. */
3194 int plt_slot_size;
3195 /* The size of the first PLT entry. */
3196 int plt_initial_entry_size;
3197
3198 /* Small local sym cache. */
3199 struct sym_cache sym_cache;
3200 };
3201
3202 /* Rename some of the generic section flags to better document how they
3203 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3204
3205 /* Nonzero if this section has TLS related relocations. */
3206 #define has_tls_reloc sec_flg0
3207
3208 /* Nonzero if this section has a call to __tls_get_addr. */
3209 #define has_tls_get_addr_call sec_flg1
3210
3211 /* Get the PPC ELF linker hash table from a link_info structure. */
3212
3213 #define ppc_elf_hash_table(p) \
3214 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3215 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3216
3217 /* Create an entry in a PPC ELF linker hash table. */
3218
3219 static struct bfd_hash_entry *
3220 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3221 struct bfd_hash_table *table,
3222 const char *string)
3223 {
3224 /* Allocate the structure if it has not already been allocated by a
3225 subclass. */
3226 if (entry == NULL)
3227 {
3228 entry = bfd_hash_allocate (table,
3229 sizeof (struct ppc_elf_link_hash_entry));
3230 if (entry == NULL)
3231 return entry;
3232 }
3233
3234 /* Call the allocation method of the superclass. */
3235 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3236 if (entry != NULL)
3237 {
3238 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3239 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3240 ppc_elf_hash_entry (entry)->tls_mask = 0;
3241 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3242 }
3243
3244 return entry;
3245 }
3246
3247 /* Create a PPC ELF linker hash table. */
3248
3249 static struct bfd_link_hash_table *
3250 ppc_elf_link_hash_table_create (bfd *abfd)
3251 {
3252 struct ppc_elf_link_hash_table *ret;
3253 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3254
3255 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3256 if (ret == NULL)
3257 return NULL;
3258
3259 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3260 ppc_elf_link_hash_newfunc,
3261 sizeof (struct ppc_elf_link_hash_entry),
3262 PPC32_ELF_DATA))
3263 {
3264 free (ret);
3265 return NULL;
3266 }
3267
3268 ret->elf.init_plt_refcount.refcount = 0;
3269 ret->elf.init_plt_refcount.glist = NULL;
3270 ret->elf.init_plt_offset.offset = 0;
3271 ret->elf.init_plt_offset.glist = NULL;
3272
3273 ret->params = &default_params;
3274
3275 ret->sdata[0].name = ".sdata";
3276 ret->sdata[0].sym_name = "_SDA_BASE_";
3277 ret->sdata[0].bss_name = ".sbss";
3278
3279 ret->sdata[1].name = ".sdata2";
3280 ret->sdata[1].sym_name = "_SDA2_BASE_";
3281 ret->sdata[1].bss_name = ".sbss2";
3282
3283 ret->plt_entry_size = 12;
3284 ret->plt_slot_size = 8;
3285 ret->plt_initial_entry_size = 72;
3286
3287 return &ret->elf.root;
3288 }
3289
3290 /* Hook linker params into hash table. */
3291
3292 void
3293 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3294 {
3295 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3296
3297 if (htab)
3298 htab->params = params;
3299 }
3300
3301 /* Create .got and the related sections. */
3302
3303 static bfd_boolean
3304 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3305 {
3306 struct ppc_elf_link_hash_table *htab;
3307 asection *s;
3308 flagword flags;
3309
3310 if (!_bfd_elf_create_got_section (abfd, info))
3311 return FALSE;
3312
3313 htab = ppc_elf_hash_table (info);
3314 htab->got = s = bfd_get_linker_section (abfd, ".got");
3315 if (s == NULL)
3316 abort ();
3317
3318 if (htab->is_vxworks)
3319 {
3320 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3321 if (!htab->sgotplt)
3322 abort ();
3323 }
3324 else
3325 {
3326 /* The powerpc .got has a blrl instruction in it. Mark it
3327 executable. */
3328 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3329 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3330 if (!bfd_set_section_flags (abfd, s, flags))
3331 return FALSE;
3332 }
3333
3334 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3335 if (!htab->relgot)
3336 abort ();
3337
3338 return TRUE;
3339 }
3340
3341 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3342 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3343 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3344
3345 static bfd_boolean
3346 ppc_elf_create_linker_section (bfd *abfd,
3347 struct bfd_link_info *info,
3348 flagword flags,
3349 elf_linker_section_t *lsect)
3350 {
3351 asection *s;
3352
3353 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3354 | SEC_LINKER_CREATED);
3355
3356 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3357 if (s == NULL)
3358 return FALSE;
3359 lsect->section = s;
3360
3361 /* Define the sym on the first section of this name. */
3362 s = bfd_get_section_by_name (abfd, lsect->name);
3363
3364 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3365 if (lsect->sym == NULL)
3366 return FALSE;
3367 lsect->sym->root.u.def.value = 0x8000;
3368 return TRUE;
3369 }
3370
3371 static bfd_boolean
3372 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3373 {
3374 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3375 asection *s;
3376 flagword flags;
3377
3378 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3379 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3380 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3381 htab->glink = s;
3382 if (s == NULL
3383 || !bfd_set_section_alignment (abfd, s,
3384 htab->params->ppc476_workaround ? 6 : 4))
3385 return FALSE;
3386
3387 if (!info->no_ld_generated_unwind_info)
3388 {
3389 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3390 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3391 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3392 htab->glink_eh_frame = s;
3393 if (s == NULL
3394 || !bfd_set_section_alignment (abfd, s, 2))
3395 return FALSE;
3396 }
3397
3398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3399 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3400 htab->iplt = s;
3401 if (s == NULL
3402 || !bfd_set_section_alignment (abfd, s, 4))
3403 return FALSE;
3404
3405 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3406 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3407 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3408 htab->reliplt = s;
3409 if (s == NULL
3410 || ! bfd_set_section_alignment (abfd, s, 2))
3411 return FALSE;
3412
3413 if (!ppc_elf_create_linker_section (abfd, info, 0,
3414 &htab->sdata[0]))
3415 return FALSE;
3416
3417 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3418 &htab->sdata[1]))
3419 return FALSE;
3420
3421 return TRUE;
3422 }
3423
3424 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3425 to output sections (just like _bfd_elf_create_dynamic_sections has
3426 to create .dynbss and .rela.bss). */
3427
3428 static bfd_boolean
3429 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432 asection *s;
3433 flagword flags;
3434
3435 htab = ppc_elf_hash_table (info);
3436
3437 if (htab->got == NULL
3438 && !ppc_elf_create_got (abfd, info))
3439 return FALSE;
3440
3441 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3442 return FALSE;
3443
3444 if (htab->glink == NULL
3445 && !ppc_elf_create_glink (abfd, info))
3446 return FALSE;
3447
3448 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3449 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3450 SEC_ALLOC | SEC_LINKER_CREATED);
3451 htab->dynsbss = s;
3452 if (s == NULL)
3453 return FALSE;
3454
3455 if (! info->shared)
3456 {
3457 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3458 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3459 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3460 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3461 htab->relsbss = s;
3462 if (s == NULL
3463 || ! bfd_set_section_alignment (abfd, s, 2))
3464 return FALSE;
3465 }
3466
3467 if (htab->is_vxworks
3468 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3469 return FALSE;
3470
3471 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3472 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3473 if (s == NULL)
3474 abort ();
3475
3476 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3477 if (htab->plt_type == PLT_VXWORKS)
3478 /* The VxWorks PLT is a loaded section with contents. */
3479 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3480 return bfd_set_section_flags (abfd, s, flags);
3481 }
3482
3483 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3484
3485 static void
3486 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3487 struct elf_link_hash_entry *dir,
3488 struct elf_link_hash_entry *ind)
3489 {
3490 struct ppc_elf_link_hash_entry *edir, *eind;
3491
3492 edir = (struct ppc_elf_link_hash_entry *) dir;
3493 eind = (struct ppc_elf_link_hash_entry *) ind;
3494
3495 edir->tls_mask |= eind->tls_mask;
3496 edir->has_sda_refs |= eind->has_sda_refs;
3497
3498 /* If called to transfer flags for a weakdef during processing
3499 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3500 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3501 if (!(ELIMINATE_COPY_RELOCS
3502 && eind->elf.root.type != bfd_link_hash_indirect
3503 && edir->elf.dynamic_adjusted))
3504 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3505
3506 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3507 edir->elf.ref_regular |= eind->elf.ref_regular;
3508 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3509 edir->elf.needs_plt |= eind->elf.needs_plt;
3510 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3511
3512 if (eind->dyn_relocs != NULL)
3513 {
3514 if (edir->dyn_relocs != NULL)
3515 {
3516 struct elf_dyn_relocs **pp;
3517 struct elf_dyn_relocs *p;
3518
3519 /* Add reloc counts against the indirect sym to the direct sym
3520 list. Merge any entries against the same section. */
3521 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3522 {
3523 struct elf_dyn_relocs *q;
3524
3525 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3526 if (q->sec == p->sec)
3527 {
3528 q->pc_count += p->pc_count;
3529 q->count += p->count;
3530 *pp = p->next;
3531 break;
3532 }
3533 if (q == NULL)
3534 pp = &p->next;
3535 }
3536 *pp = edir->dyn_relocs;
3537 }
3538
3539 edir->dyn_relocs = eind->dyn_relocs;
3540 eind->dyn_relocs = NULL;
3541 }
3542
3543 /* If we were called to copy over info for a weak sym, that's all.
3544 You might think dyn_relocs need not be copied over; After all,
3545 both syms will be dynamic or both non-dynamic so we're just
3546 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3547 code in ppc_elf_adjust_dynamic_symbol needs to check for
3548 dyn_relocs in read-only sections, and it does so on what is the
3549 DIR sym here. */
3550 if (eind->elf.root.type != bfd_link_hash_indirect)
3551 return;
3552
3553 /* Copy over the GOT refcount entries that we may have already seen to
3554 the symbol which just became indirect. */
3555 edir->elf.got.refcount += eind->elf.got.refcount;
3556 eind->elf.got.refcount = 0;
3557
3558 /* And plt entries. */
3559 if (eind->elf.plt.plist != NULL)
3560 {
3561 if (edir->elf.plt.plist != NULL)
3562 {
3563 struct plt_entry **entp;
3564 struct plt_entry *ent;
3565
3566 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3567 {
3568 struct plt_entry *dent;
3569
3570 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3571 if (dent->sec == ent->sec && dent->addend == ent->addend)
3572 {
3573 dent->plt.refcount += ent->plt.refcount;
3574 *entp = ent->next;
3575 break;
3576 }
3577 if (dent == NULL)
3578 entp = &ent->next;
3579 }
3580 *entp = edir->elf.plt.plist;
3581 }
3582
3583 edir->elf.plt.plist = eind->elf.plt.plist;
3584 eind->elf.plt.plist = NULL;
3585 }
3586
3587 if (eind->elf.dynindx != -1)
3588 {
3589 if (edir->elf.dynindx != -1)
3590 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3591 edir->elf.dynstr_index);
3592 edir->elf.dynindx = eind->elf.dynindx;
3593 edir->elf.dynstr_index = eind->elf.dynstr_index;
3594 eind->elf.dynindx = -1;
3595 eind->elf.dynstr_index = 0;
3596 }
3597 }
3598
3599 /* Hook called by the linker routine which adds symbols from an object
3600 file. We use it to put .comm items in .sbss, and not .bss. */
3601
3602 static bfd_boolean
3603 ppc_elf_add_symbol_hook (bfd *abfd,
3604 struct bfd_link_info *info,
3605 Elf_Internal_Sym *sym,
3606 const char **namep ATTRIBUTE_UNUSED,
3607 flagword *flagsp ATTRIBUTE_UNUSED,
3608 asection **secp,
3609 bfd_vma *valp)
3610 {
3611 if (sym->st_shndx == SHN_COMMON
3612 && !info->relocatable
3613 && is_ppc_elf (info->output_bfd)
3614 && sym->st_size <= elf_gp_size (abfd))
3615 {
3616 /* Common symbols less than or equal to -G nn bytes are automatically
3617 put into .sbss. */
3618 struct ppc_elf_link_hash_table *htab;
3619
3620 htab = ppc_elf_hash_table (info);
3621 if (htab->sbss == NULL)
3622 {
3623 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3624
3625 if (!htab->elf.dynobj)
3626 htab->elf.dynobj = abfd;
3627
3628 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3629 ".sbss",
3630 flags);
3631 if (htab->sbss == NULL)
3632 return FALSE;
3633 }
3634
3635 *secp = htab->sbss;
3636 *valp = sym->st_size;
3637 }
3638
3639 if ((abfd->flags & DYNAMIC) == 0
3640 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3641 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3642 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3643
3644 return TRUE;
3645 }
3646 \f
3647 /* Find a linker generated pointer with a given addend and type. */
3648
3649 static elf_linker_section_pointers_t *
3650 elf_find_pointer_linker_section
3651 (elf_linker_section_pointers_t *linker_pointers,
3652 bfd_vma addend,
3653 elf_linker_section_t *lsect)
3654 {
3655 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3656 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3657 return linker_pointers;
3658
3659 return NULL;
3660 }
3661
3662 /* Allocate a pointer to live in a linker created section. */
3663
3664 static bfd_boolean
3665 elf_allocate_pointer_linker_section (bfd *abfd,
3666 elf_linker_section_t *lsect,
3667 struct elf_link_hash_entry *h,
3668 const Elf_Internal_Rela *rel)
3669 {
3670 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3671 elf_linker_section_pointers_t *linker_section_ptr;
3672 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3673 bfd_size_type amt;
3674
3675 BFD_ASSERT (lsect != NULL);
3676
3677 /* Is this a global symbol? */
3678 if (h != NULL)
3679 {
3680 struct ppc_elf_link_hash_entry *eh;
3681
3682 /* Has this symbol already been allocated? If so, our work is done. */
3683 eh = (struct ppc_elf_link_hash_entry *) h;
3684 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3685 rel->r_addend,
3686 lsect))
3687 return TRUE;
3688
3689 ptr_linker_section_ptr = &eh->linker_section_pointer;
3690 }
3691 else
3692 {
3693 BFD_ASSERT (is_ppc_elf (abfd));
3694
3695 /* Allocation of a pointer to a local symbol. */
3696 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3697
3698 /* Allocate a table to hold the local symbols if first time. */
3699 if (!ptr)
3700 {
3701 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3702
3703 amt = num_symbols;
3704 amt *= sizeof (elf_linker_section_pointers_t *);
3705 ptr = bfd_zalloc (abfd, amt);
3706
3707 if (!ptr)
3708 return FALSE;
3709
3710 elf_local_ptr_offsets (abfd) = ptr;
3711 }
3712
3713 /* Has this symbol already been allocated? If so, our work is done. */
3714 if (elf_find_pointer_linker_section (ptr[r_symndx],
3715 rel->r_addend,
3716 lsect))
3717 return TRUE;
3718
3719 ptr_linker_section_ptr = &ptr[r_symndx];
3720 }
3721
3722 /* Allocate space for a pointer in the linker section, and allocate
3723 a new pointer record from internal memory. */
3724 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3725 amt = sizeof (elf_linker_section_pointers_t);
3726 linker_section_ptr = bfd_alloc (abfd, amt);
3727
3728 if (!linker_section_ptr)
3729 return FALSE;
3730
3731 linker_section_ptr->next = *ptr_linker_section_ptr;
3732 linker_section_ptr->addend = rel->r_addend;
3733 linker_section_ptr->lsect = lsect;
3734 *ptr_linker_section_ptr = linker_section_ptr;
3735
3736 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3737 return FALSE;
3738 linker_section_ptr->offset = lsect->section->size;
3739 lsect->section->size += 4;
3740
3741 #ifdef DEBUG
3742 fprintf (stderr,
3743 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3744 lsect->name, (long) linker_section_ptr->offset,
3745 (long) lsect->section->size);
3746 #endif
3747
3748 return TRUE;
3749 }
3750
3751 static struct plt_entry **
3752 update_local_sym_info (bfd *abfd,
3753 Elf_Internal_Shdr *symtab_hdr,
3754 unsigned long r_symndx,
3755 int tls_type)
3756 {
3757 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3758 struct plt_entry **local_plt;
3759 char *local_got_tls_masks;
3760
3761 if (local_got_refcounts == NULL)
3762 {
3763 bfd_size_type size = symtab_hdr->sh_info;
3764
3765 size *= (sizeof (*local_got_refcounts)
3766 + sizeof (*local_plt)
3767 + sizeof (*local_got_tls_masks));
3768 local_got_refcounts = bfd_zalloc (abfd, size);
3769 if (local_got_refcounts == NULL)
3770 return NULL;
3771 elf_local_got_refcounts (abfd) = local_got_refcounts;
3772 }
3773
3774 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3775 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3776 local_got_tls_masks[r_symndx] |= tls_type;
3777 if (tls_type != PLT_IFUNC)
3778 local_got_refcounts[r_symndx] += 1;
3779 return local_plt + r_symndx;
3780 }
3781
3782 static bfd_boolean
3783 update_plt_info (bfd *abfd, struct plt_entry **plist,
3784 asection *sec, bfd_vma addend)
3785 {
3786 struct plt_entry *ent;
3787
3788 if (addend < 32768)
3789 sec = NULL;
3790 for (ent = *plist; ent != NULL; ent = ent->next)
3791 if (ent->sec == sec && ent->addend == addend)
3792 break;
3793 if (ent == NULL)
3794 {
3795 bfd_size_type amt = sizeof (*ent);
3796 ent = bfd_alloc (abfd, amt);
3797 if (ent == NULL)
3798 return FALSE;
3799 ent->next = *plist;
3800 ent->sec = sec;
3801 ent->addend = addend;
3802 ent->plt.refcount = 0;
3803 *plist = ent;
3804 }
3805 ent->plt.refcount += 1;
3806 return TRUE;
3807 }
3808
3809 static struct plt_entry *
3810 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3811 {
3812 struct plt_entry *ent;
3813
3814 if (addend < 32768)
3815 sec = NULL;
3816 for (ent = *plist; ent != NULL; ent = ent->next)
3817 if (ent->sec == sec && ent->addend == addend)
3818 break;
3819 return ent;
3820 }
3821
3822 static bfd_boolean
3823 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3824 {
3825 return (r_type == R_PPC_PLTREL24
3826 || r_type == R_PPC_LOCAL24PC
3827 || r_type == R_PPC_REL24
3828 || r_type == R_PPC_REL14
3829 || r_type == R_PPC_REL14_BRTAKEN
3830 || r_type == R_PPC_REL14_BRNTAKEN
3831 || r_type == R_PPC_ADDR24
3832 || r_type == R_PPC_ADDR14
3833 || r_type == R_PPC_ADDR14_BRTAKEN
3834 || r_type == R_PPC_ADDR14_BRNTAKEN);
3835 }
3836
3837 static void
3838 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3839 {
3840 (*_bfd_error_handler)
3841 (_("%B: relocation %s cannot be used when making a shared object"),
3842 abfd,
3843 ppc_elf_howto_table[r_type]->name);
3844 bfd_set_error (bfd_error_bad_value);
3845 }
3846
3847 /* Look through the relocs for a section during the first phase, and
3848 allocate space in the global offset table or procedure linkage
3849 table. */
3850
3851 static bfd_boolean
3852 ppc_elf_check_relocs (bfd *abfd,
3853 struct bfd_link_info *info,
3854 asection *sec,
3855 const Elf_Internal_Rela *relocs)
3856 {
3857 struct ppc_elf_link_hash_table *htab;
3858 Elf_Internal_Shdr *symtab_hdr;
3859 struct elf_link_hash_entry **sym_hashes;
3860 const Elf_Internal_Rela *rel;
3861 const Elf_Internal_Rela *rel_end;
3862 asection *got2, *sreloc;
3863 struct elf_link_hash_entry *tga;
3864
3865 if (info->relocatable)
3866 return TRUE;
3867
3868 /* Don't do anything special with non-loaded, non-alloced sections.
3869 In particular, any relocs in such sections should not affect GOT
3870 and PLT reference counting (ie. we don't allow them to create GOT
3871 or PLT entries), there's no possibility or desire to optimize TLS
3872 relocs, and there's not much point in propagating relocs to shared
3873 libs that the dynamic linker won't relocate. */
3874 if ((sec->flags & SEC_ALLOC) == 0)
3875 return TRUE;
3876
3877 #ifdef DEBUG
3878 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3879 sec, abfd);
3880 #endif
3881
3882 BFD_ASSERT (is_ppc_elf (abfd));
3883
3884 /* Initialize howto table if not already done. */
3885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3886 ppc_elf_howto_init ();
3887
3888 htab = ppc_elf_hash_table (info);
3889 if (htab->glink == NULL)
3890 {
3891 if (htab->elf.dynobj == NULL)
3892 htab->elf.dynobj = abfd;
3893 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3894 return FALSE;
3895 }
3896 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3897 FALSE, FALSE, TRUE);
3898 symtab_hdr = &elf_symtab_hdr (abfd);
3899 sym_hashes = elf_sym_hashes (abfd);
3900 got2 = bfd_get_section_by_name (abfd, ".got2");
3901 sreloc = NULL;
3902
3903 rel_end = relocs + sec->reloc_count;
3904 for (rel = relocs; rel < rel_end; rel++)
3905 {
3906 unsigned long r_symndx;
3907 enum elf_ppc_reloc_type r_type;
3908 struct elf_link_hash_entry *h;
3909 int tls_type;
3910
3911 r_symndx = ELF32_R_SYM (rel->r_info);
3912 if (r_symndx < symtab_hdr->sh_info)
3913 h = NULL;
3914 else
3915 {
3916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3917 while (h->root.type == bfd_link_hash_indirect
3918 || h->root.type == bfd_link_hash_warning)
3919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3920
3921 /* PR15323, ref flags aren't set for references in the same
3922 object. */
3923 h->root.non_ir_ref = 1;
3924 }
3925
3926 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3927 This shows up in particular in an R_PPC_ADDR32 in the eabi
3928 startup code. */
3929 if (h != NULL
3930 && htab->got == NULL
3931 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3932 {
3933 if (htab->elf.dynobj == NULL)
3934 htab->elf.dynobj = abfd;
3935 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3936 return FALSE;
3937 BFD_ASSERT (h == htab->elf.hgot);
3938 }
3939
3940 tls_type = 0;
3941 r_type = ELF32_R_TYPE (rel->r_info);
3942 if (h == NULL && !htab->is_vxworks)
3943 {
3944 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3945 abfd, r_symndx);
3946 if (isym == NULL)
3947 return FALSE;
3948
3949 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3950 {
3951 struct plt_entry **ifunc;
3952
3953 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3954 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3955 PLT_IFUNC);
3956 if (ifunc == NULL)
3957 return FALSE;
3958
3959 /* STT_GNU_IFUNC symbols must have a PLT entry;
3960 In a non-pie executable even when there are
3961 no plt calls. */
3962 if (!info->shared
3963 || is_branch_reloc (r_type))
3964 {
3965 bfd_vma addend = 0;
3966 if (r_type == R_PPC_PLTREL24)
3967 {
3968 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3969 if (info->shared)
3970 addend = rel->r_addend;
3971 }
3972 if (!update_plt_info (abfd, ifunc, got2, addend))
3973 return FALSE;
3974 }
3975 }
3976 }
3977
3978 if (!htab->is_vxworks
3979 && is_branch_reloc (r_type)
3980 && h != NULL
3981 && h == tga)
3982 {
3983 if (rel != relocs
3984 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3985 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3986 /* We have a new-style __tls_get_addr call with a marker
3987 reloc. */
3988 ;
3989 else
3990 /* Mark this section as having an old-style call. */
3991 sec->has_tls_get_addr_call = 1;
3992 }
3993
3994 switch (r_type)
3995 {
3996 case R_PPC_TLSGD:
3997 case R_PPC_TLSLD:
3998 /* These special tls relocs tie a call to __tls_get_addr with
3999 its parameter symbol. */
4000 break;
4001
4002 case R_PPC_GOT_TLSLD16:
4003 case R_PPC_GOT_TLSLD16_LO:
4004 case R_PPC_GOT_TLSLD16_HI:
4005 case R_PPC_GOT_TLSLD16_HA:
4006 tls_type = TLS_TLS | TLS_LD;
4007 goto dogottls;
4008
4009 case R_PPC_GOT_TLSGD16:
4010 case R_PPC_GOT_TLSGD16_LO:
4011 case R_PPC_GOT_TLSGD16_HI:
4012 case R_PPC_GOT_TLSGD16_HA:
4013 tls_type = TLS_TLS | TLS_GD;
4014 goto dogottls;
4015
4016 case R_PPC_GOT_TPREL16:
4017 case R_PPC_GOT_TPREL16_LO:
4018 case R_PPC_GOT_TPREL16_HI:
4019 case R_PPC_GOT_TPREL16_HA:
4020 if (info->shared)
4021 info->flags |= DF_STATIC_TLS;
4022 tls_type = TLS_TLS | TLS_TPREL;
4023 goto dogottls;
4024
4025 case R_PPC_GOT_DTPREL16:
4026 case R_PPC_GOT_DTPREL16_LO:
4027 case R_PPC_GOT_DTPREL16_HI:
4028 case R_PPC_GOT_DTPREL16_HA:
4029 tls_type = TLS_TLS | TLS_DTPREL;
4030 dogottls:
4031 sec->has_tls_reloc = 1;
4032 /* Fall thru */
4033
4034 /* GOT16 relocations */
4035 case R_PPC_GOT16:
4036 case R_PPC_GOT16_LO:
4037 case R_PPC_GOT16_HI:
4038 case R_PPC_GOT16_HA:
4039 /* This symbol requires a global offset table entry. */
4040 if (htab->got == NULL)
4041 {
4042 if (htab->elf.dynobj == NULL)
4043 htab->elf.dynobj = abfd;
4044 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4045 return FALSE;
4046 }
4047 if (h != NULL)
4048 {
4049 h->got.refcount += 1;
4050 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4051 }
4052 else
4053 /* This is a global offset table entry for a local symbol. */
4054 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4055 return FALSE;
4056
4057 /* We may also need a plt entry if the symbol turns out to be
4058 an ifunc. */
4059 if (h != NULL && !info->shared)
4060 {
4061 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4062 return FALSE;
4063 }
4064 break;
4065
4066 /* Indirect .sdata relocation. */
4067 case R_PPC_EMB_SDAI16:
4068 if (info->shared)
4069 {
4070 bad_shared_reloc (abfd, r_type);
4071 return FALSE;
4072 }
4073 htab->sdata[0].sym->ref_regular = 1;
4074 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4075 h, rel))
4076 return FALSE;
4077 if (h != NULL)
4078 {
4079 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4080 h->non_got_ref = TRUE;
4081 }
4082 break;
4083
4084 /* Indirect .sdata2 relocation. */
4085 case R_PPC_EMB_SDA2I16:
4086 if (info->shared)
4087 {
4088 bad_shared_reloc (abfd, r_type);
4089 return FALSE;
4090 }
4091 htab->sdata[1].sym->ref_regular = 1;
4092 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4093 h, rel))
4094 return FALSE;
4095 if (h != NULL)
4096 {
4097 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4098 h->non_got_ref = TRUE;
4099 }
4100 break;
4101
4102 case R_PPC_SDAREL16:
4103 htab->sdata[0].sym->ref_regular = 1;
4104 /* Fall thru */
4105
4106 case R_PPC_VLE_SDAREL_LO16A:
4107 case R_PPC_VLE_SDAREL_LO16D:
4108 case R_PPC_VLE_SDAREL_HI16A:
4109 case R_PPC_VLE_SDAREL_HI16D:
4110 case R_PPC_VLE_SDAREL_HA16A:
4111 case R_PPC_VLE_SDAREL_HA16D:
4112 if (h != NULL)
4113 {
4114 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4115 h->non_got_ref = TRUE;
4116 }
4117 break;
4118
4119 case R_PPC_VLE_REL8:
4120 case R_PPC_VLE_REL15:
4121 case R_PPC_VLE_REL24:
4122 case R_PPC_VLE_LO16A:
4123 case R_PPC_VLE_LO16D:
4124 case R_PPC_VLE_HI16A:
4125 case R_PPC_VLE_HI16D:
4126 case R_PPC_VLE_HA16A:
4127 case R_PPC_VLE_HA16D:
4128 break;
4129
4130 case R_PPC_EMB_SDA2REL:
4131 if (info->shared)
4132 {
4133 bad_shared_reloc (abfd, r_type);
4134 return FALSE;
4135 }
4136 htab->sdata[1].sym->ref_regular = 1;
4137 if (h != NULL)
4138 {
4139 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4140 h->non_got_ref = TRUE;
4141 }
4142 break;
4143
4144 case R_PPC_VLE_SDA21_LO:
4145 case R_PPC_VLE_SDA21:
4146 case R_PPC_EMB_SDA21:
4147 case R_PPC_EMB_RELSDA:
4148 if (info->shared)
4149 {
4150 bad_shared_reloc (abfd, r_type);
4151 return FALSE;
4152 }
4153 if (h != NULL)
4154 {
4155 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4156 h->non_got_ref = TRUE;
4157 }
4158 break;
4159
4160 case R_PPC_EMB_NADDR32:
4161 case R_PPC_EMB_NADDR16:
4162 case R_PPC_EMB_NADDR16_LO:
4163 case R_PPC_EMB_NADDR16_HI:
4164 case R_PPC_EMB_NADDR16_HA:
4165 if (info->shared)
4166 {
4167 bad_shared_reloc (abfd, r_type);
4168 return FALSE;
4169 }
4170 if (h != NULL)
4171 h->non_got_ref = TRUE;
4172 break;
4173
4174 case R_PPC_PLTREL24:
4175 if (h == NULL)
4176 break;
4177 /* Fall through */
4178 case R_PPC_PLT32:
4179 case R_PPC_PLTREL32:
4180 case R_PPC_PLT16_LO:
4181 case R_PPC_PLT16_HI:
4182 case R_PPC_PLT16_HA:
4183 #ifdef DEBUG
4184 fprintf (stderr, "Reloc requires a PLT entry\n");
4185 #endif
4186 /* This symbol requires a procedure linkage table entry. We
4187 actually build the entry in finish_dynamic_symbol,
4188 because this might be a case of linking PIC code without
4189 linking in any dynamic objects, in which case we don't
4190 need to generate a procedure linkage table after all. */
4191
4192 if (h == NULL)
4193 {
4194 /* It does not make sense to have a procedure linkage
4195 table entry for a local symbol. */
4196 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4197 abfd, sec, rel->r_offset,
4198 ppc_elf_howto_table[r_type]->name);
4199 bfd_set_error (bfd_error_bad_value);
4200 return FALSE;
4201 }
4202 else
4203 {
4204 bfd_vma addend = 0;
4205
4206 if (r_type == R_PPC_PLTREL24)
4207 {
4208 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4209 if (info->shared)
4210 addend = rel->r_addend;
4211 }
4212 h->needs_plt = 1;
4213 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4214 return FALSE;
4215 }
4216 break;
4217
4218 /* The following relocations don't need to propagate the
4219 relocation if linking a shared object since they are
4220 section relative. */
4221 case R_PPC_SECTOFF:
4222 case R_PPC_SECTOFF_LO:
4223 case R_PPC_SECTOFF_HI:
4224 case R_PPC_SECTOFF_HA:
4225 case R_PPC_DTPREL16:
4226 case R_PPC_DTPREL16_LO:
4227 case R_PPC_DTPREL16_HI:
4228 case R_PPC_DTPREL16_HA:
4229 case R_PPC_TOC16:
4230 break;
4231
4232 case R_PPC_REL16:
4233 case R_PPC_REL16_LO:
4234 case R_PPC_REL16_HI:
4235 case R_PPC_REL16_HA:
4236 ppc_elf_tdata (abfd)->has_rel16 = 1;
4237 break;
4238
4239 /* These are just markers. */
4240 case R_PPC_TLS:
4241 case R_PPC_EMB_MRKREF:
4242 case R_PPC_NONE:
4243 case R_PPC_max:
4244 case R_PPC_RELAX:
4245 case R_PPC_RELAX_PLT:
4246 case R_PPC_RELAX_PLTREL24:
4247 break;
4248
4249 /* These should only appear in dynamic objects. */
4250 case R_PPC_COPY:
4251 case R_PPC_GLOB_DAT:
4252 case R_PPC_JMP_SLOT:
4253 case R_PPC_RELATIVE:
4254 case R_PPC_IRELATIVE:
4255 break;
4256
4257 /* These aren't handled yet. We'll report an error later. */
4258 case R_PPC_ADDR30:
4259 case R_PPC_EMB_RELSEC16:
4260 case R_PPC_EMB_RELST_LO:
4261 case R_PPC_EMB_RELST_HI:
4262 case R_PPC_EMB_RELST_HA:
4263 case R_PPC_EMB_BIT_FLD:
4264 break;
4265
4266 /* This refers only to functions defined in the shared library. */
4267 case R_PPC_LOCAL24PC:
4268 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4269 {
4270 htab->plt_type = PLT_OLD;
4271 htab->old_bfd = abfd;
4272 }
4273 if (h != NULL && h->type == STT_GNU_IFUNC)
4274 {
4275 if (info->shared)
4276 {
4277 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4278 abfd, sec, rel->r_offset,
4279 h->root.root.string);
4280 bfd_set_error (bfd_error_bad_value);
4281 return FALSE;
4282 }
4283 h->needs_plt = 1;
4284 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4285 return FALSE;
4286 }
4287 break;
4288
4289 /* This relocation describes the C++ object vtable hierarchy.
4290 Reconstruct it for later use during GC. */
4291 case R_PPC_GNU_VTINHERIT:
4292 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4293 return FALSE;
4294 break;
4295
4296 /* This relocation describes which C++ vtable entries are actually
4297 used. Record for later use during GC. */
4298 case R_PPC_GNU_VTENTRY:
4299 BFD_ASSERT (h != NULL);
4300 if (h != NULL
4301 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4302 return FALSE;
4303 break;
4304
4305 /* We shouldn't really be seeing these. */
4306 case R_PPC_TPREL32:
4307 case R_PPC_TPREL16:
4308 case R_PPC_TPREL16_LO:
4309 case R_PPC_TPREL16_HI:
4310 case R_PPC_TPREL16_HA:
4311 if (info->shared)
4312 info->flags |= DF_STATIC_TLS;
4313 goto dodyn;
4314
4315 /* Nor these. */
4316 case R_PPC_DTPMOD32:
4317 case R_PPC_DTPREL32:
4318 goto dodyn;
4319
4320 case R_PPC_REL32:
4321 if (h == NULL
4322 && got2 != NULL
4323 && (sec->flags & SEC_CODE) != 0
4324 && info->shared
4325 && htab->plt_type == PLT_UNSET)
4326 {
4327 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4328 the start of a function, which assembles to a REL32
4329 reference to .got2. If we detect one of these, then
4330 force the old PLT layout because the linker cannot
4331 reliably deduce the GOT pointer value needed for
4332 PLT call stubs. */
4333 asection *s;
4334 Elf_Internal_Sym *isym;
4335
4336 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4337 abfd, r_symndx);
4338 if (isym == NULL)
4339 return FALSE;
4340
4341 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4342 if (s == got2)
4343 {
4344 htab->plt_type = PLT_OLD;
4345 htab->old_bfd = abfd;
4346 }
4347 }
4348 if (h == NULL || h == htab->elf.hgot)
4349 break;
4350 /* fall through */
4351
4352 case R_PPC_ADDR32:
4353 case R_PPC_ADDR16:
4354 case R_PPC_ADDR16_LO:
4355 case R_PPC_ADDR16_HI:
4356 case R_PPC_ADDR16_HA:
4357 case R_PPC_UADDR32:
4358 case R_PPC_UADDR16:
4359 if (h != NULL && !info->shared)
4360 {
4361 /* We may need a plt entry if the symbol turns out to be
4362 a function defined in a dynamic object. */
4363 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4364 return FALSE;
4365
4366 /* We may need a copy reloc too. */
4367 h->non_got_ref = 1;
4368 h->pointer_equality_needed = 1;
4369 }
4370 goto dodyn;
4371
4372 case R_PPC_REL24:
4373 case R_PPC_REL14:
4374 case R_PPC_REL14_BRTAKEN:
4375 case R_PPC_REL14_BRNTAKEN:
4376 if (h == NULL)
4377 break;
4378 if (h == htab->elf.hgot)
4379 {
4380 if (htab->plt_type == PLT_UNSET)
4381 {
4382 htab->plt_type = PLT_OLD;
4383 htab->old_bfd = abfd;
4384 }
4385 break;
4386 }
4387 /* fall through */
4388
4389 case R_PPC_ADDR24:
4390 case R_PPC_ADDR14:
4391 case R_PPC_ADDR14_BRTAKEN:
4392 case R_PPC_ADDR14_BRNTAKEN:
4393 if (h != NULL && !info->shared)
4394 {
4395 /* We may need a plt entry if the symbol turns out to be
4396 a function defined in a dynamic object. */
4397 h->needs_plt = 1;
4398 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4399 return FALSE;
4400 break;
4401 }
4402
4403 dodyn:
4404 /* If we are creating a shared library, and this is a reloc
4405 against a global symbol, or a non PC relative reloc
4406 against a local symbol, then we need to copy the reloc
4407 into the shared library. However, if we are linking with
4408 -Bsymbolic, we do not need to copy a reloc against a
4409 global symbol which is defined in an object we are
4410 including in the link (i.e., DEF_REGULAR is set). At
4411 this point we have not seen all the input files, so it is
4412 possible that DEF_REGULAR is not set now but will be set
4413 later (it is never cleared). In case of a weak definition,
4414 DEF_REGULAR may be cleared later by a strong definition in
4415 a shared library. We account for that possibility below by
4416 storing information in the dyn_relocs field of the hash
4417 table entry. A similar situation occurs when creating
4418 shared libraries and symbol visibility changes render the
4419 symbol local.
4420
4421 If on the other hand, we are creating an executable, we
4422 may need to keep relocations for symbols satisfied by a
4423 dynamic library if we manage to avoid copy relocs for the
4424 symbol. */
4425 if ((info->shared
4426 && (must_be_dyn_reloc (info, r_type)
4427 || (h != NULL
4428 && (!SYMBOLIC_BIND (info, h)
4429 || h->root.type == bfd_link_hash_defweak
4430 || !h->def_regular))))
4431 || (ELIMINATE_COPY_RELOCS
4432 && !info->shared
4433 && h != NULL
4434 && (h->root.type == bfd_link_hash_defweak
4435 || !h->def_regular)))
4436 {
4437 #ifdef DEBUG
4438 fprintf (stderr,
4439 "ppc_elf_check_relocs needs to "
4440 "create relocation for %s\n",
4441 (h && h->root.root.string
4442 ? h->root.root.string : "<unknown>"));
4443 #endif
4444 if (sreloc == NULL)
4445 {
4446 if (htab->elf.dynobj == NULL)
4447 htab->elf.dynobj = abfd;
4448
4449 sreloc = _bfd_elf_make_dynamic_reloc_section
4450 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4451
4452 if (sreloc == NULL)
4453 return FALSE;
4454 }
4455
4456 /* If this is a global symbol, we count the number of
4457 relocations we need for this symbol. */
4458 if (h != NULL)
4459 {
4460 struct elf_dyn_relocs *p;
4461 struct elf_dyn_relocs **rel_head;
4462
4463 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4464 p = *rel_head;
4465 if (p == NULL || p->sec != sec)
4466 {
4467 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4468 if (p == NULL)
4469 return FALSE;
4470 p->next = *rel_head;
4471 *rel_head = p;
4472 p->sec = sec;
4473 p->count = 0;
4474 p->pc_count = 0;
4475 }
4476 p->count += 1;
4477 if (!must_be_dyn_reloc (info, r_type))
4478 p->pc_count += 1;
4479 }
4480 else
4481 {
4482 /* Track dynamic relocs needed for local syms too.
4483 We really need local syms available to do this
4484 easily. Oh well. */
4485 struct ppc_dyn_relocs *p;
4486 struct ppc_dyn_relocs **rel_head;
4487 bfd_boolean is_ifunc;
4488 asection *s;
4489 void *vpp;
4490 Elf_Internal_Sym *isym;
4491
4492 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4493 abfd, r_symndx);
4494 if (isym == NULL)
4495 return FALSE;
4496
4497 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4498 if (s == NULL)
4499 s = sec;
4500
4501 vpp = &elf_section_data (s)->local_dynrel;
4502 rel_head = (struct ppc_dyn_relocs **) vpp;
4503 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4504 p = *rel_head;
4505 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4506 p = p->next;
4507 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4508 {
4509 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4510 if (p == NULL)
4511 return FALSE;
4512 p->next = *rel_head;
4513 *rel_head = p;
4514 p->sec = sec;
4515 p->ifunc = is_ifunc;
4516 p->count = 0;
4517 }
4518 p->count += 1;
4519 }
4520 }
4521
4522 break;
4523 }
4524 }
4525
4526 return TRUE;
4527 }
4528 \f
4529
4530 /* Merge object attributes from IBFD into OBFD. Raise an error if
4531 there are conflicting attributes. */
4532 static bfd_boolean
4533 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4534 {
4535 obj_attribute *in_attr, *in_attrs;
4536 obj_attribute *out_attr, *out_attrs;
4537
4538 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4539 {
4540 /* This is the first object. Copy the attributes. */
4541 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4542
4543 /* Use the Tag_null value to indicate the attributes have been
4544 initialized. */
4545 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4546
4547 return TRUE;
4548 }
4549
4550 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4551 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4552
4553 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4554 non-conflicting ones. */
4555 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4556 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4557 if (in_attr->i != out_attr->i)
4558 {
4559 out_attr->type = 1;
4560 if (out_attr->i == 0)
4561 out_attr->i = in_attr->i;
4562 else if (in_attr->i == 0)
4563 ;
4564 else if (out_attr->i == 1 && in_attr->i == 2)
4565 _bfd_error_handler
4566 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4567 else if (out_attr->i == 1 && in_attr->i == 3)
4568 _bfd_error_handler
4569 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4570 obfd, ibfd);
4571 else if (out_attr->i == 3 && in_attr->i == 1)
4572 _bfd_error_handler
4573 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4574 ibfd, obfd);
4575 else if (out_attr->i == 3 && in_attr->i == 2)
4576 _bfd_error_handler
4577 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4578 ibfd, obfd);
4579 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4580 _bfd_error_handler
4581 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4582 else if (in_attr->i > 3)
4583 _bfd_error_handler
4584 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4585 in_attr->i);
4586 else
4587 _bfd_error_handler
4588 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4589 out_attr->i);
4590 }
4591
4592 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4593 merge non-conflicting ones. */
4594 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4595 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4596 if (in_attr->i != out_attr->i)
4597 {
4598 const char *in_abi = NULL, *out_abi = NULL;
4599
4600 switch (in_attr->i)
4601 {
4602 case 1: in_abi = "generic"; break;
4603 case 2: in_abi = "AltiVec"; break;
4604 case 3: in_abi = "SPE"; break;
4605 }
4606
4607 switch (out_attr->i)
4608 {
4609 case 1: out_abi = "generic"; break;
4610 case 2: out_abi = "AltiVec"; break;
4611 case 3: out_abi = "SPE"; break;
4612 }
4613
4614 out_attr->type = 1;
4615 if (out_attr->i == 0)
4616 out_attr->i = in_attr->i;
4617 else if (in_attr->i == 0)
4618 ;
4619 /* For now, allow generic to transition to AltiVec or SPE
4620 without a warning. If GCC marked files with their stack
4621 alignment and used don't-care markings for files which are
4622 not affected by the vector ABI, we could warn about this
4623 case too. */
4624 else if (out_attr->i == 1)
4625 out_attr->i = in_attr->i;
4626 else if (in_attr->i == 1)
4627 ;
4628 else if (in_abi == NULL)
4629 _bfd_error_handler
4630 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4631 in_attr->i);
4632 else if (out_abi == NULL)
4633 _bfd_error_handler
4634 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4635 in_attr->i);
4636 else
4637 _bfd_error_handler
4638 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4639 ibfd, obfd, in_abi, out_abi);
4640 }
4641
4642 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4643 and merge non-conflicting ones. */
4644 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4645 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4646 if (in_attr->i != out_attr->i)
4647 {
4648 out_attr->type = 1;
4649 if (out_attr->i == 0)
4650 out_attr->i = in_attr->i;
4651 else if (in_attr->i == 0)
4652 ;
4653 else if (out_attr->i == 1 && in_attr->i == 2)
4654 _bfd_error_handler
4655 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4656 else if (out_attr->i == 2 && in_attr->i == 1)
4657 _bfd_error_handler
4658 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4659 else if (in_attr->i > 2)
4660 _bfd_error_handler
4661 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4662 in_attr->i);
4663 else
4664 _bfd_error_handler
4665 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4666 out_attr->i);
4667 }
4668
4669 /* Merge Tag_compatibility attributes and any common GNU ones. */
4670 _bfd_elf_merge_object_attributes (ibfd, obfd);
4671
4672 return TRUE;
4673 }
4674
4675 /* Merge backend specific data from an object file to the output
4676 object file when linking. */
4677
4678 static bfd_boolean
4679 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4680 {
4681 flagword old_flags;
4682 flagword new_flags;
4683 bfd_boolean error;
4684
4685 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4686 return TRUE;
4687
4688 /* Check if we have the same endianness. */
4689 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4690 return FALSE;
4691
4692 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4693 return FALSE;
4694
4695 new_flags = elf_elfheader (ibfd)->e_flags;
4696 old_flags = elf_elfheader (obfd)->e_flags;
4697 if (!elf_flags_init (obfd))
4698 {
4699 /* First call, no flags set. */
4700 elf_flags_init (obfd) = TRUE;
4701 elf_elfheader (obfd)->e_flags = new_flags;
4702 }
4703
4704 /* Compatible flags are ok. */
4705 else if (new_flags == old_flags)
4706 ;
4707
4708 /* Incompatible flags. */
4709 else
4710 {
4711 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4712 to be linked with either. */
4713 error = FALSE;
4714 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4715 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4716 {
4717 error = TRUE;
4718 (*_bfd_error_handler)
4719 (_("%B: compiled with -mrelocatable and linked with "
4720 "modules compiled normally"), ibfd);
4721 }
4722 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4723 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4724 {
4725 error = TRUE;
4726 (*_bfd_error_handler)
4727 (_("%B: compiled normally and linked with "
4728 "modules compiled with -mrelocatable"), ibfd);
4729 }
4730
4731 /* The output is -mrelocatable-lib iff both the input files are. */
4732 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4733 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4734
4735 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4736 but each input file is either -mrelocatable or -mrelocatable-lib. */
4737 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4738 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4739 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4740 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4741
4742 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4743 any module uses it. */
4744 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4745
4746 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4747 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4748
4749 /* Warn about any other mismatches. */
4750 if (new_flags != old_flags)
4751 {
4752 error = TRUE;
4753 (*_bfd_error_handler)
4754 (_("%B: uses different e_flags (0x%lx) fields "
4755 "than previous modules (0x%lx)"),
4756 ibfd, (long) new_flags, (long) old_flags);
4757 }
4758
4759 if (error)
4760 {
4761 bfd_set_error (bfd_error_bad_value);
4762 return FALSE;
4763 }
4764 }
4765
4766 return TRUE;
4767 }
4768
4769 static void
4770 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4771 bfd_vma value,
4772 split16_format_type split16_format)
4773
4774 {
4775 unsigned int insn, top5;
4776
4777 insn = bfd_get_32 (output_bfd, loc);
4778 top5 = value & 0xf800;
4779 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4780 insn |= top5;
4781 insn |= value & 0x7ff;
4782 bfd_put_32 (output_bfd, insn, loc);
4783 }
4784
4785 \f
4786 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4787 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4788 int
4789 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4790 struct bfd_link_info *info)
4791 {
4792 struct ppc_elf_link_hash_table *htab;
4793 flagword flags;
4794
4795 htab = ppc_elf_hash_table (info);
4796
4797 if (htab->plt_type == PLT_UNSET)
4798 {
4799 struct elf_link_hash_entry *h;
4800
4801 if (htab->params->plt_style == PLT_OLD)
4802 htab->plt_type = PLT_OLD;
4803 else if (info->shared
4804 && htab->elf.dynamic_sections_created
4805 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4806 FALSE, FALSE, TRUE)) != NULL
4807 && (h->type == STT_FUNC
4808 || h->needs_plt)
4809 && h->ref_regular
4810 && !(SYMBOL_CALLS_LOCAL (info, h)
4811 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4812 && h->root.type == bfd_link_hash_undefweak)))
4813 {
4814 /* Profiling of shared libs (and pies) is not supported with
4815 secure plt, because ppc32 does profiling before a
4816 function prologue and a secure plt pic call stubs needs
4817 r30 to be set up. */
4818 htab->plt_type = PLT_OLD;
4819 }
4820 else
4821 {
4822 bfd *ibfd;
4823 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4824
4825 /* Look through the reloc flags left by ppc_elf_check_relocs.
4826 Use the old style bss plt if a file makes plt calls
4827 without using the new relocs, and if ld isn't given
4828 --secure-plt and we never see REL16 relocs. */
4829 if (plt_type == PLT_UNSET)
4830 plt_type = PLT_OLD;
4831 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4832 if (is_ppc_elf (ibfd))
4833 {
4834 if (ppc_elf_tdata (ibfd)->has_rel16)
4835 plt_type = PLT_NEW;
4836 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4837 {
4838 plt_type = PLT_OLD;
4839 htab->old_bfd = ibfd;
4840 break;
4841 }
4842 }
4843 htab->plt_type = plt_type;
4844 }
4845 }
4846 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4847 {
4848 if (htab->old_bfd != NULL)
4849 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4850 htab->old_bfd);
4851 else
4852 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4853 }
4854
4855 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4856
4857 if (htab->plt_type == PLT_NEW)
4858 {
4859 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4861
4862 /* The new PLT is a loaded section. */
4863 if (htab->plt != NULL
4864 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4865 return -1;
4866
4867 /* The new GOT is not executable. */
4868 if (htab->got != NULL
4869 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4870 return -1;
4871 }
4872 else
4873 {
4874 /* Stop an unused .glink section from affecting .text alignment. */
4875 if (htab->glink != NULL
4876 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4877 return -1;
4878 }
4879 return htab->plt_type == PLT_NEW;
4880 }
4881 \f
4882 /* Return the section that should be marked against GC for a given
4883 relocation. */
4884
4885 static asection *
4886 ppc_elf_gc_mark_hook (asection *sec,
4887 struct bfd_link_info *info,
4888 Elf_Internal_Rela *rel,
4889 struct elf_link_hash_entry *h,
4890 Elf_Internal_Sym *sym)
4891 {
4892 if (h != NULL)
4893 switch (ELF32_R_TYPE (rel->r_info))
4894 {
4895 case R_PPC_GNU_VTINHERIT:
4896 case R_PPC_GNU_VTENTRY:
4897 return NULL;
4898 }
4899
4900 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4901 }
4902
4903 /* Update the got, plt and dynamic reloc reference counts for the
4904 section being removed. */
4905
4906 static bfd_boolean
4907 ppc_elf_gc_sweep_hook (bfd *abfd,
4908 struct bfd_link_info *info,
4909 asection *sec,
4910 const Elf_Internal_Rela *relocs)
4911 {
4912 struct ppc_elf_link_hash_table *htab;
4913 Elf_Internal_Shdr *symtab_hdr;
4914 struct elf_link_hash_entry **sym_hashes;
4915 bfd_signed_vma *local_got_refcounts;
4916 const Elf_Internal_Rela *rel, *relend;
4917 asection *got2;
4918
4919 if (info->relocatable)
4920 return TRUE;
4921
4922 if ((sec->flags & SEC_ALLOC) == 0)
4923 return TRUE;
4924
4925 elf_section_data (sec)->local_dynrel = NULL;
4926
4927 htab = ppc_elf_hash_table (info);
4928 symtab_hdr = &elf_symtab_hdr (abfd);
4929 sym_hashes = elf_sym_hashes (abfd);
4930 local_got_refcounts = elf_local_got_refcounts (abfd);
4931 got2 = bfd_get_section_by_name (abfd, ".got2");
4932
4933 relend = relocs + sec->reloc_count;
4934 for (rel = relocs; rel < relend; rel++)
4935 {
4936 unsigned long r_symndx;
4937 enum elf_ppc_reloc_type r_type;
4938 struct elf_link_hash_entry *h = NULL;
4939
4940 r_symndx = ELF32_R_SYM (rel->r_info);
4941 if (r_symndx >= symtab_hdr->sh_info)
4942 {
4943 struct elf_dyn_relocs **pp, *p;
4944 struct ppc_elf_link_hash_entry *eh;
4945
4946 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4947 while (h->root.type == bfd_link_hash_indirect
4948 || h->root.type == bfd_link_hash_warning)
4949 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4950 eh = (struct ppc_elf_link_hash_entry *) h;
4951
4952 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4953 if (p->sec == sec)
4954 {
4955 /* Everything must go for SEC. */
4956 *pp = p->next;
4957 break;
4958 }
4959 }
4960
4961 r_type = ELF32_R_TYPE (rel->r_info);
4962 if (!htab->is_vxworks
4963 && h == NULL
4964 && local_got_refcounts != NULL
4965 && (!info->shared
4966 || is_branch_reloc (r_type)))
4967 {
4968 struct plt_entry **local_plt = (struct plt_entry **)
4969 (local_got_refcounts + symtab_hdr->sh_info);
4970 char *local_got_tls_masks = (char *)
4971 (local_plt + symtab_hdr->sh_info);
4972 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4973 {
4974 struct plt_entry **ifunc = local_plt + r_symndx;
4975 bfd_vma addend = 0;
4976 struct plt_entry *ent;
4977
4978 if (r_type == R_PPC_PLTREL24 && info->shared)
4979 addend = rel->r_addend;
4980 ent = find_plt_ent (ifunc, got2, addend);
4981 if (ent->plt.refcount > 0)
4982 ent->plt.refcount -= 1;
4983 continue;
4984 }
4985 }
4986
4987 switch (r_type)
4988 {
4989 case R_PPC_GOT_TLSLD16:
4990 case R_PPC_GOT_TLSLD16_LO:
4991 case R_PPC_GOT_TLSLD16_HI:
4992 case R_PPC_GOT_TLSLD16_HA:
4993 case R_PPC_GOT_TLSGD16:
4994 case R_PPC_GOT_TLSGD16_LO:
4995 case R_PPC_GOT_TLSGD16_HI:
4996 case R_PPC_GOT_TLSGD16_HA:
4997 case R_PPC_GOT_TPREL16:
4998 case R_PPC_GOT_TPREL16_LO:
4999 case R_PPC_GOT_TPREL16_HI:
5000 case R_PPC_GOT_TPREL16_HA:
5001 case R_PPC_GOT_DTPREL16:
5002 case R_PPC_GOT_DTPREL16_LO:
5003 case R_PPC_GOT_DTPREL16_HI:
5004 case R_PPC_GOT_DTPREL16_HA:
5005 case R_PPC_GOT16:
5006 case R_PPC_GOT16_LO:
5007 case R_PPC_GOT16_HI:
5008 case R_PPC_GOT16_HA:
5009 if (h != NULL)
5010 {
5011 if (h->got.refcount > 0)
5012 h->got.refcount--;
5013 if (!info->shared)
5014 {
5015 struct plt_entry *ent;
5016
5017 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5018 if (ent != NULL && ent->plt.refcount > 0)
5019 ent->plt.refcount -= 1;
5020 }
5021 }
5022 else if (local_got_refcounts != NULL)
5023 {
5024 if (local_got_refcounts[r_symndx] > 0)
5025 local_got_refcounts[r_symndx]--;
5026 }
5027 break;
5028
5029 case R_PPC_REL24:
5030 case R_PPC_REL14:
5031 case R_PPC_REL14_BRTAKEN:
5032 case R_PPC_REL14_BRNTAKEN:
5033 case R_PPC_REL32:
5034 if (h == NULL || h == htab->elf.hgot)
5035 break;
5036 /* Fall thru */
5037
5038 case R_PPC_ADDR32:
5039 case R_PPC_ADDR24:
5040 case R_PPC_ADDR16:
5041 case R_PPC_ADDR16_LO:
5042 case R_PPC_ADDR16_HI:
5043 case R_PPC_ADDR16_HA:
5044 case R_PPC_ADDR14:
5045 case R_PPC_ADDR14_BRTAKEN:
5046 case R_PPC_ADDR14_BRNTAKEN:
5047 case R_PPC_UADDR32:
5048 case R_PPC_UADDR16:
5049 if (info->shared)
5050 break;
5051
5052 case R_PPC_PLT32:
5053 case R_PPC_PLTREL24:
5054 case R_PPC_PLTREL32:
5055 case R_PPC_PLT16_LO:
5056 case R_PPC_PLT16_HI:
5057 case R_PPC_PLT16_HA:
5058 if (h != NULL)
5059 {
5060 bfd_vma addend = 0;
5061 struct plt_entry *ent;
5062
5063 if (r_type == R_PPC_PLTREL24 && info->shared)
5064 addend = rel->r_addend;
5065 ent = find_plt_ent (&h->plt.plist, got2, addend);
5066 if (ent != NULL && ent->plt.refcount > 0)
5067 ent->plt.refcount -= 1;
5068 }
5069 break;
5070
5071 default:
5072 break;
5073 }
5074 }
5075 return TRUE;
5076 }
5077 \f
5078 /* Set plt output section type, htab->tls_get_addr, and call the
5079 generic ELF tls_setup function. */
5080
5081 asection *
5082 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5083 {
5084 struct ppc_elf_link_hash_table *htab;
5085
5086 htab = ppc_elf_hash_table (info);
5087 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5088 FALSE, FALSE, TRUE);
5089 if (!htab->params->no_tls_get_addr_opt)
5090 {
5091 struct elf_link_hash_entry *opt, *tga;
5092 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5093 FALSE, FALSE, TRUE);
5094 if (opt != NULL
5095 && (opt->root.type == bfd_link_hash_defined
5096 || opt->root.type == bfd_link_hash_defweak))
5097 {
5098 /* If glibc supports an optimized __tls_get_addr call stub,
5099 signalled by the presence of __tls_get_addr_opt, and we'll
5100 be calling __tls_get_addr via a plt call stub, then
5101 make __tls_get_addr point to __tls_get_addr_opt. */
5102 tga = htab->tls_get_addr;
5103 if (htab->elf.dynamic_sections_created
5104 && tga != NULL
5105 && (tga->type == STT_FUNC
5106 || tga->needs_plt)
5107 && !(SYMBOL_CALLS_LOCAL (info, tga)
5108 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5109 && tga->root.type == bfd_link_hash_undefweak)))
5110 {
5111 struct plt_entry *ent;
5112 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5113 if (ent->plt.refcount > 0)
5114 break;
5115 if (ent != NULL)
5116 {
5117 tga->root.type = bfd_link_hash_indirect;
5118 tga->root.u.i.link = &opt->root;
5119 ppc_elf_copy_indirect_symbol (info, opt, tga);
5120 if (opt->dynindx != -1)
5121 {
5122 /* Use __tls_get_addr_opt in dynamic relocations. */
5123 opt->dynindx = -1;
5124 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5125 opt->dynstr_index);
5126 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5127 return FALSE;
5128 }
5129 htab->tls_get_addr = opt;
5130 }
5131 }
5132 }
5133 else
5134 htab->params->no_tls_get_addr_opt = TRUE;
5135 }
5136 if (htab->plt_type == PLT_NEW
5137 && htab->plt != NULL
5138 && htab->plt->output_section != NULL)
5139 {
5140 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5141 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5142 }
5143
5144 return _bfd_elf_tls_setup (obfd, info);
5145 }
5146
5147 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5148 HASH. */
5149
5150 static bfd_boolean
5151 branch_reloc_hash_match (const bfd *ibfd,
5152 const Elf_Internal_Rela *rel,
5153 const struct elf_link_hash_entry *hash)
5154 {
5155 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5156 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5157 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5158
5159 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5160 {
5161 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5162 struct elf_link_hash_entry *h;
5163
5164 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5165 while (h->root.type == bfd_link_hash_indirect
5166 || h->root.type == bfd_link_hash_warning)
5167 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5168 if (h == hash)
5169 return TRUE;
5170 }
5171 return FALSE;
5172 }
5173
5174 /* Run through all the TLS relocs looking for optimization
5175 opportunities. */
5176
5177 bfd_boolean
5178 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5179 struct bfd_link_info *info)
5180 {
5181 bfd *ibfd;
5182 asection *sec;
5183 struct ppc_elf_link_hash_table *htab;
5184 int pass;
5185
5186 if (info->relocatable || !info->executable)
5187 return TRUE;
5188
5189 htab = ppc_elf_hash_table (info);
5190 if (htab == NULL)
5191 return FALSE;
5192
5193 /* Make two passes through the relocs. First time check that tls
5194 relocs involved in setting up a tls_get_addr call are indeed
5195 followed by such a call. If they are not, don't do any tls
5196 optimization. On the second pass twiddle tls_mask flags to
5197 notify relocate_section that optimization can be done, and
5198 adjust got and plt refcounts. */
5199 for (pass = 0; pass < 2; ++pass)
5200 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5201 {
5202 Elf_Internal_Sym *locsyms = NULL;
5203 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5204 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5205
5206 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5207 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5208 {
5209 Elf_Internal_Rela *relstart, *rel, *relend;
5210 int expecting_tls_get_addr = 0;
5211
5212 /* Read the relocations. */
5213 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5214 info->keep_memory);
5215 if (relstart == NULL)
5216 return FALSE;
5217
5218 relend = relstart + sec->reloc_count;
5219 for (rel = relstart; rel < relend; rel++)
5220 {
5221 enum elf_ppc_reloc_type r_type;
5222 unsigned long r_symndx;
5223 struct elf_link_hash_entry *h = NULL;
5224 char *tls_mask;
5225 char tls_set, tls_clear;
5226 bfd_boolean is_local;
5227 bfd_signed_vma *got_count;
5228
5229 r_symndx = ELF32_R_SYM (rel->r_info);
5230 if (r_symndx >= symtab_hdr->sh_info)
5231 {
5232 struct elf_link_hash_entry **sym_hashes;
5233
5234 sym_hashes = elf_sym_hashes (ibfd);
5235 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5236 while (h->root.type == bfd_link_hash_indirect
5237 || h->root.type == bfd_link_hash_warning)
5238 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5239 }
5240
5241 is_local = FALSE;
5242 if (h == NULL
5243 || !h->def_dynamic)
5244 is_local = TRUE;
5245
5246 r_type = ELF32_R_TYPE (rel->r_info);
5247 /* If this section has old-style __tls_get_addr calls
5248 without marker relocs, then check that each
5249 __tls_get_addr call reloc is preceded by a reloc
5250 that conceivably belongs to the __tls_get_addr arg
5251 setup insn. If we don't find matching arg setup
5252 relocs, don't do any tls optimization. */
5253 if (pass == 0
5254 && sec->has_tls_get_addr_call
5255 && h != NULL
5256 && h == htab->tls_get_addr
5257 && !expecting_tls_get_addr
5258 && is_branch_reloc (r_type))
5259 {
5260 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5261 "TLS optimization disabled\n",
5262 ibfd, sec, rel->r_offset);
5263 if (elf_section_data (sec)->relocs != relstart)
5264 free (relstart);
5265 return TRUE;
5266 }
5267
5268 expecting_tls_get_addr = 0;
5269 switch (r_type)
5270 {
5271 case R_PPC_GOT_TLSLD16:
5272 case R_PPC_GOT_TLSLD16_LO:
5273 expecting_tls_get_addr = 1;
5274 /* Fall thru */
5275
5276 case R_PPC_GOT_TLSLD16_HI:
5277 case R_PPC_GOT_TLSLD16_HA:
5278 /* These relocs should never be against a symbol
5279 defined in a shared lib. Leave them alone if
5280 that turns out to be the case. */
5281 if (!is_local)
5282 continue;
5283
5284 /* LD -> LE */
5285 tls_set = 0;
5286 tls_clear = TLS_LD;
5287 break;
5288
5289 case R_PPC_GOT_TLSGD16:
5290 case R_PPC_GOT_TLSGD16_LO:
5291 expecting_tls_get_addr = 1;
5292 /* Fall thru */
5293
5294 case R_PPC_GOT_TLSGD16_HI:
5295 case R_PPC_GOT_TLSGD16_HA:
5296 if (is_local)
5297 /* GD -> LE */
5298 tls_set = 0;
5299 else
5300 /* GD -> IE */
5301 tls_set = TLS_TLS | TLS_TPRELGD;
5302 tls_clear = TLS_GD;
5303 break;
5304
5305 case R_PPC_GOT_TPREL16:
5306 case R_PPC_GOT_TPREL16_LO:
5307 case R_PPC_GOT_TPREL16_HI:
5308 case R_PPC_GOT_TPREL16_HA:
5309 if (is_local)
5310 {
5311 /* IE -> LE */
5312 tls_set = 0;
5313 tls_clear = TLS_TPREL;
5314 break;
5315 }
5316 else
5317 continue;
5318
5319 case R_PPC_TLSGD:
5320 case R_PPC_TLSLD:
5321 expecting_tls_get_addr = 2;
5322 tls_set = 0;
5323 tls_clear = 0;
5324 break;
5325
5326 default:
5327 continue;
5328 }
5329
5330 if (pass == 0)
5331 {
5332 if (!expecting_tls_get_addr
5333 || (expecting_tls_get_addr == 1
5334 && !sec->has_tls_get_addr_call))
5335 continue;
5336
5337 if (rel + 1 < relend
5338 && branch_reloc_hash_match (ibfd, rel + 1,
5339 htab->tls_get_addr))
5340 continue;
5341
5342 /* Uh oh, we didn't find the expected call. We
5343 could just mark this symbol to exclude it
5344 from tls optimization but it's safer to skip
5345 the entire optimization. */
5346 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5347 "TLS optimization disabled\n"),
5348 ibfd, sec, rel->r_offset);
5349 if (elf_section_data (sec)->relocs != relstart)
5350 free (relstart);
5351 return TRUE;
5352 }
5353
5354 if (expecting_tls_get_addr)
5355 {
5356 struct plt_entry *ent;
5357 bfd_vma addend = 0;
5358
5359 if (info->shared
5360 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5361 addend = rel[1].r_addend;
5362 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5363 got2, addend);
5364 if (ent != NULL && ent->plt.refcount > 0)
5365 ent->plt.refcount -= 1;
5366
5367 if (expecting_tls_get_addr == 2)
5368 continue;
5369 }
5370
5371 if (h != NULL)
5372 {
5373 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5374 got_count = &h->got.refcount;
5375 }
5376 else
5377 {
5378 bfd_signed_vma *lgot_refs;
5379 struct plt_entry **local_plt;
5380 char *lgot_masks;
5381
5382 if (locsyms == NULL)
5383 {
5384 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5385 if (locsyms == NULL)
5386 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5387 symtab_hdr->sh_info,
5388 0, NULL, NULL, NULL);
5389 if (locsyms == NULL)
5390 {
5391 if (elf_section_data (sec)->relocs != relstart)
5392 free (relstart);
5393 return FALSE;
5394 }
5395 }
5396 lgot_refs = elf_local_got_refcounts (ibfd);
5397 if (lgot_refs == NULL)
5398 abort ();
5399 local_plt = (struct plt_entry **)
5400 (lgot_refs + symtab_hdr->sh_info);
5401 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5402 tls_mask = &lgot_masks[r_symndx];
5403 got_count = &lgot_refs[r_symndx];
5404 }
5405
5406 if (tls_set == 0)
5407 {
5408 /* We managed to get rid of a got entry. */
5409 if (*got_count > 0)
5410 *got_count -= 1;
5411 }
5412
5413 *tls_mask |= tls_set;
5414 *tls_mask &= ~tls_clear;
5415 }
5416
5417 if (elf_section_data (sec)->relocs != relstart)
5418 free (relstart);
5419 }
5420
5421 if (locsyms != NULL
5422 && (symtab_hdr->contents != (unsigned char *) locsyms))
5423 {
5424 if (!info->keep_memory)
5425 free (locsyms);
5426 else
5427 symtab_hdr->contents = (unsigned char *) locsyms;
5428 }
5429 }
5430 return TRUE;
5431 }
5432 \f
5433 /* Return true if we have dynamic relocs that apply to read-only sections. */
5434
5435 static bfd_boolean
5436 readonly_dynrelocs (struct elf_link_hash_entry *h)
5437 {
5438 struct elf_dyn_relocs *p;
5439
5440 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5441 {
5442 asection *s = p->sec->output_section;
5443
5444 if (s != NULL
5445 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5446 == (SEC_READONLY | SEC_ALLOC)))
5447 return TRUE;
5448 }
5449 return FALSE;
5450 }
5451
5452 /* Adjust a symbol defined by a dynamic object and referenced by a
5453 regular object. The current definition is in some section of the
5454 dynamic object, but we're not including those sections. We have to
5455 change the definition to something the rest of the link can
5456 understand. */
5457
5458 static bfd_boolean
5459 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5460 struct elf_link_hash_entry *h)
5461 {
5462 struct ppc_elf_link_hash_table *htab;
5463 asection *s;
5464
5465 #ifdef DEBUG
5466 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5467 h->root.root.string);
5468 #endif
5469
5470 /* Make sure we know what is going on here. */
5471 htab = ppc_elf_hash_table (info);
5472 BFD_ASSERT (htab->elf.dynobj != NULL
5473 && (h->needs_plt
5474 || h->type == STT_GNU_IFUNC
5475 || h->u.weakdef != NULL
5476 || (h->def_dynamic
5477 && h->ref_regular
5478 && !h->def_regular)));
5479
5480 /* Deal with function syms. */
5481 if (h->type == STT_FUNC
5482 || h->type == STT_GNU_IFUNC
5483 || h->needs_plt)
5484 {
5485 /* Clear procedure linkage table information for any symbol that
5486 won't need a .plt entry. */
5487 struct plt_entry *ent;
5488 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5489 if (ent->plt.refcount > 0)
5490 break;
5491 if (ent == NULL
5492 || (h->type != STT_GNU_IFUNC
5493 && (SYMBOL_CALLS_LOCAL (info, h)
5494 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5495 && h->root.type == bfd_link_hash_undefweak))))
5496 {
5497 /* A PLT entry is not required/allowed when:
5498
5499 1. We are not using ld.so; because then the PLT entry
5500 can't be set up, so we can't use one. In this case,
5501 ppc_elf_adjust_dynamic_symbol won't even be called.
5502
5503 2. GC has rendered the entry unused.
5504
5505 3. We know for certain that a call to this symbol
5506 will go to this object, or will remain undefined. */
5507 h->plt.plist = NULL;
5508 h->needs_plt = 0;
5509 h->pointer_equality_needed = 0;
5510 }
5511 else
5512 {
5513 /* Taking a function's address in a read/write section
5514 doesn't require us to define the function symbol in the
5515 executable on a global entry stub. A dynamic reloc can
5516 be used instead. */
5517 if (h->pointer_equality_needed
5518 && !readonly_dynrelocs (h))
5519 {
5520 h->pointer_equality_needed = 0;
5521 h->non_got_ref = 0;
5522 }
5523
5524 /* After adjust_dynamic_symbol, non_got_ref set in the
5525 non-shared case means that we have allocated space in
5526 .dynbss for the symbol and thus dyn_relocs for this
5527 symbol should be discarded.
5528 If we get here we know we are making a PLT entry for this
5529 symbol, and in an executable we'd normally resolve
5530 relocations against this symbol to the PLT entry. Allow
5531 dynamic relocs if the reference is weak, and the dynamic
5532 relocs will not cause text relocation. */
5533 else if (!h->ref_regular_nonweak
5534 && h->non_got_ref
5535 && h->type != STT_GNU_IFUNC
5536 && !htab->is_vxworks
5537 && !ppc_elf_hash_entry (h)->has_sda_refs
5538 && !readonly_dynrelocs (h))
5539 h->non_got_ref = 0;
5540 }
5541 return TRUE;
5542 }
5543 else
5544 h->plt.plist = NULL;
5545
5546 /* If this is a weak symbol, and there is a real definition, the
5547 processor independent code will have arranged for us to see the
5548 real definition first, and we can just use the same value. */
5549 if (h->u.weakdef != NULL)
5550 {
5551 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5552 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5553 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5554 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5555 if (ELIMINATE_COPY_RELOCS)
5556 h->non_got_ref = h->u.weakdef->non_got_ref;
5557 return TRUE;
5558 }
5559
5560 /* This is a reference to a symbol defined by a dynamic object which
5561 is not a function. */
5562
5563 /* If we are creating a shared library, we must presume that the
5564 only references to the symbol are via the global offset table.
5565 For such cases we need not do anything here; the relocations will
5566 be handled correctly by relocate_section. */
5567 if (info->shared)
5568 return TRUE;
5569
5570 /* If there are no references to this symbol that do not use the
5571 GOT, we don't need to generate a copy reloc. */
5572 if (!h->non_got_ref)
5573 return TRUE;
5574
5575 /* If we didn't find any dynamic relocs in read-only sections, then
5576 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5577 We can't do this if there are any small data relocations. This
5578 doesn't work on VxWorks, where we can not have dynamic
5579 relocations (other than copy and jump slot relocations) in an
5580 executable. */
5581 if (ELIMINATE_COPY_RELOCS
5582 && !ppc_elf_hash_entry (h)->has_sda_refs
5583 && !htab->is_vxworks
5584 && !h->def_regular
5585 && !readonly_dynrelocs (h))
5586 {
5587 h->non_got_ref = 0;
5588 return TRUE;
5589 }
5590
5591 /* We must allocate the symbol in our .dynbss section, which will
5592 become part of the .bss section of the executable. There will be
5593 an entry for this symbol in the .dynsym section. The dynamic
5594 object will contain position independent code, so all references
5595 from the dynamic object to this symbol will go through the global
5596 offset table. The dynamic linker will use the .dynsym entry to
5597 determine the address it must put in the global offset table, so
5598 both the dynamic object and the regular object will refer to the
5599 same memory location for the variable.
5600
5601 Of course, if the symbol is referenced using SDAREL relocs, we
5602 must instead allocate it in .sbss. */
5603
5604 if (ppc_elf_hash_entry (h)->has_sda_refs)
5605 s = htab->dynsbss;
5606 else
5607 s = htab->dynbss;
5608 BFD_ASSERT (s != NULL);
5609
5610 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5611 copy the initial value out of the dynamic object and into the
5612 runtime process image. We need to remember the offset into the
5613 .rela.bss section we are going to use. */
5614 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5615 {
5616 asection *srel;
5617
5618 if (ppc_elf_hash_entry (h)->has_sda_refs)
5619 srel = htab->relsbss;
5620 else
5621 srel = htab->relbss;
5622 BFD_ASSERT (srel != NULL);
5623 srel->size += sizeof (Elf32_External_Rela);
5624 h->needs_copy = 1;
5625 }
5626
5627 return _bfd_elf_adjust_dynamic_copy (h, s);
5628 }
5629 \f
5630 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5631 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5632 specifying the addend on the plt relocation. For -fpic code, the sym
5633 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5634 xxxxxxxx.got2.plt_pic32.<callee>. */
5635
5636 static bfd_boolean
5637 add_stub_sym (struct plt_entry *ent,
5638 struct elf_link_hash_entry *h,
5639 struct bfd_link_info *info)
5640 {
5641 struct elf_link_hash_entry *sh;
5642 size_t len1, len2, len3;
5643 char *name;
5644 const char *stub;
5645 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5646
5647 if (info->shared)
5648 stub = ".plt_pic32.";
5649 else
5650 stub = ".plt_call32.";
5651
5652 len1 = strlen (h->root.root.string);
5653 len2 = strlen (stub);
5654 len3 = 0;
5655 if (ent->sec)
5656 len3 = strlen (ent->sec->name);
5657 name = bfd_malloc (len1 + len2 + len3 + 9);
5658 if (name == NULL)
5659 return FALSE;
5660 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5661 if (ent->sec)
5662 memcpy (name + 8, ent->sec->name, len3);
5663 memcpy (name + 8 + len3, stub, len2);
5664 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5665 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5666 if (sh == NULL)
5667 return FALSE;
5668 if (sh->root.type == bfd_link_hash_new)
5669 {
5670 sh->root.type = bfd_link_hash_defined;
5671 sh->root.u.def.section = htab->glink;
5672 sh->root.u.def.value = ent->glink_offset;
5673 sh->ref_regular = 1;
5674 sh->def_regular = 1;
5675 sh->ref_regular_nonweak = 1;
5676 sh->forced_local = 1;
5677 sh->non_elf = 0;
5678 }
5679 return TRUE;
5680 }
5681
5682 /* Allocate NEED contiguous space in .got, and return the offset.
5683 Handles allocation of the got header when crossing 32k. */
5684
5685 static bfd_vma
5686 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5687 {
5688 bfd_vma where;
5689 unsigned int max_before_header;
5690
5691 if (htab->plt_type == PLT_VXWORKS)
5692 {
5693 where = htab->got->size;
5694 htab->got->size += need;
5695 }
5696 else
5697 {
5698 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5699 if (need <= htab->got_gap)
5700 {
5701 where = max_before_header - htab->got_gap;
5702 htab->got_gap -= need;
5703 }
5704 else
5705 {
5706 if (htab->got->size + need > max_before_header
5707 && htab->got->size <= max_before_header)
5708 {
5709 htab->got_gap = max_before_header - htab->got->size;
5710 htab->got->size = max_before_header + htab->got_header_size;
5711 }
5712 where = htab->got->size;
5713 htab->got->size += need;
5714 }
5715 }
5716 return where;
5717 }
5718
5719 /* Allocate space in associated reloc sections for dynamic relocs. */
5720
5721 static bfd_boolean
5722 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5723 {
5724 struct bfd_link_info *info = inf;
5725 struct ppc_elf_link_hash_entry *eh;
5726 struct ppc_elf_link_hash_table *htab;
5727 struct elf_dyn_relocs *p;
5728
5729 if (h->root.type == bfd_link_hash_indirect)
5730 return TRUE;
5731
5732 htab = ppc_elf_hash_table (info);
5733 if (htab->elf.dynamic_sections_created
5734 || h->type == STT_GNU_IFUNC)
5735 {
5736 struct plt_entry *ent;
5737 bfd_boolean doneone = FALSE;
5738 bfd_vma plt_offset = 0, glink_offset = 0;
5739 bfd_boolean dyn;
5740
5741 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5742 if (ent->plt.refcount > 0)
5743 {
5744 /* Make sure this symbol is output as a dynamic symbol. */
5745 if (h->dynindx == -1
5746 && !h->forced_local
5747 && !h->def_regular
5748 && htab->elf.dynamic_sections_created)
5749 {
5750 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5751 return FALSE;
5752 }
5753
5754 dyn = htab->elf.dynamic_sections_created;
5755 if (info->shared
5756 || h->type == STT_GNU_IFUNC
5757 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5758 {
5759 asection *s = htab->plt;
5760 if (!dyn || h->dynindx == -1)
5761 s = htab->iplt;
5762
5763 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5764 {
5765 if (!doneone)
5766 {
5767 plt_offset = s->size;
5768 s->size += 4;
5769 }
5770 ent->plt.offset = plt_offset;
5771
5772 s = htab->glink;
5773 if (!doneone || info->shared)
5774 {
5775 glink_offset = s->size;
5776 s->size += GLINK_ENTRY_SIZE;
5777 if (h == htab->tls_get_addr
5778 && !htab->params->no_tls_get_addr_opt)
5779 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5780 }
5781 if (!doneone
5782 && !info->shared
5783 && h->def_dynamic
5784 && !h->def_regular)
5785 {
5786 h->root.u.def.section = s;
5787 h->root.u.def.value = glink_offset;
5788 }
5789 ent->glink_offset = glink_offset;
5790
5791 if (htab->params->emit_stub_syms
5792 && !add_stub_sym (ent, h, info))
5793 return FALSE;
5794 }
5795 else
5796 {
5797 if (!doneone)
5798 {
5799 /* If this is the first .plt entry, make room
5800 for the special first entry. */
5801 if (s->size == 0)
5802 s->size += htab->plt_initial_entry_size;
5803
5804 /* The PowerPC PLT is actually composed of two
5805 parts, the first part is 2 words (for a load
5806 and a jump), and then there is a remaining
5807 word available at the end. */
5808 plt_offset = (htab->plt_initial_entry_size
5809 + (htab->plt_slot_size
5810 * ((s->size
5811 - htab->plt_initial_entry_size)
5812 / htab->plt_entry_size)));
5813
5814 /* If this symbol is not defined in a regular
5815 file, and we are not generating a shared
5816 library, then set the symbol to this location
5817 in the .plt. This is to avoid text
5818 relocations, and is required to make
5819 function pointers compare as equal between
5820 the normal executable and the shared library. */
5821 if (! info->shared
5822 && h->def_dynamic
5823 && !h->def_regular)
5824 {
5825 h->root.u.def.section = s;
5826 h->root.u.def.value = plt_offset;
5827 }
5828
5829 /* Make room for this entry. */
5830 s->size += htab->plt_entry_size;
5831 /* After the 8192nd entry, room for two entries
5832 is allocated. */
5833 if (htab->plt_type == PLT_OLD
5834 && (s->size - htab->plt_initial_entry_size)
5835 / htab->plt_entry_size
5836 > PLT_NUM_SINGLE_ENTRIES)
5837 s->size += htab->plt_entry_size;
5838 }
5839 ent->plt.offset = plt_offset;
5840 }
5841
5842 /* We also need to make an entry in the .rela.plt section. */
5843 if (!doneone)
5844 {
5845 if (!htab->elf.dynamic_sections_created
5846 || h->dynindx == -1)
5847 htab->reliplt->size += sizeof (Elf32_External_Rela);
5848 else
5849 {
5850 htab->relplt->size += sizeof (Elf32_External_Rela);
5851
5852 if (htab->plt_type == PLT_VXWORKS)
5853 {
5854 /* Allocate space for the unloaded relocations. */
5855 if (!info->shared
5856 && htab->elf.dynamic_sections_created)
5857 {
5858 if (ent->plt.offset
5859 == (bfd_vma) htab->plt_initial_entry_size)
5860 {
5861 htab->srelplt2->size
5862 += (sizeof (Elf32_External_Rela)
5863 * VXWORKS_PLTRESOLVE_RELOCS);
5864 }
5865
5866 htab->srelplt2->size
5867 += (sizeof (Elf32_External_Rela)
5868 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5869 }
5870
5871 /* Every PLT entry has an associated GOT entry in
5872 .got.plt. */
5873 htab->sgotplt->size += 4;
5874 }
5875 }
5876 doneone = TRUE;
5877 }
5878 }
5879 else
5880 ent->plt.offset = (bfd_vma) -1;
5881 }
5882 else
5883 ent->plt.offset = (bfd_vma) -1;
5884
5885 if (!doneone)
5886 {
5887 h->plt.plist = NULL;
5888 h->needs_plt = 0;
5889 }
5890 }
5891 else
5892 {
5893 h->plt.plist = NULL;
5894 h->needs_plt = 0;
5895 }
5896
5897 eh = (struct ppc_elf_link_hash_entry *) h;
5898 if (eh->elf.got.refcount > 0)
5899 {
5900 bfd_boolean dyn;
5901 unsigned int need;
5902
5903 /* Make sure this symbol is output as a dynamic symbol. */
5904 if (eh->elf.dynindx == -1
5905 && !eh->elf.forced_local
5906 && eh->elf.type != STT_GNU_IFUNC
5907 && htab->elf.dynamic_sections_created)
5908 {
5909 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5910 return FALSE;
5911 }
5912
5913 need = 0;
5914 if ((eh->tls_mask & TLS_TLS) != 0)
5915 {
5916 if ((eh->tls_mask & TLS_LD) != 0)
5917 {
5918 if (!eh->elf.def_dynamic)
5919 /* We'll just use htab->tlsld_got.offset. This should
5920 always be the case. It's a little odd if we have
5921 a local dynamic reloc against a non-local symbol. */
5922 htab->tlsld_got.refcount += 1;
5923 else
5924 need += 8;
5925 }
5926 if ((eh->tls_mask & TLS_GD) != 0)
5927 need += 8;
5928 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5929 need += 4;
5930 if ((eh->tls_mask & TLS_DTPREL) != 0)
5931 need += 4;
5932 }
5933 else
5934 need += 4;
5935 if (need == 0)
5936 eh->elf.got.offset = (bfd_vma) -1;
5937 else
5938 {
5939 eh->elf.got.offset = allocate_got (htab, need);
5940 dyn = htab->elf.dynamic_sections_created;
5941 if ((info->shared
5942 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5943 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5944 || eh->elf.root.type != bfd_link_hash_undefweak))
5945 {
5946 asection *rsec = htab->relgot;
5947
5948 if (eh->elf.type == STT_GNU_IFUNC)
5949 rsec = htab->reliplt;
5950 /* All the entries we allocated need relocs.
5951 Except LD only needs one. */
5952 if ((eh->tls_mask & TLS_LD) != 0
5953 && eh->elf.def_dynamic)
5954 need -= 4;
5955 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5956 }
5957 }
5958 }
5959 else
5960 eh->elf.got.offset = (bfd_vma) -1;
5961
5962 if (eh->dyn_relocs == NULL
5963 || !htab->elf.dynamic_sections_created)
5964 return TRUE;
5965
5966 /* In the shared -Bsymbolic case, discard space allocated for
5967 dynamic pc-relative relocs against symbols which turn out to be
5968 defined in regular objects. For the normal shared case, discard
5969 space for relocs that have become local due to symbol visibility
5970 changes. */
5971
5972 if (info->shared)
5973 {
5974 /* Relocs that use pc_count are those that appear on a call insn,
5975 or certain REL relocs (see must_be_dyn_reloc) that can be
5976 generated via assembly. We want calls to protected symbols to
5977 resolve directly to the function rather than going via the plt.
5978 If people want function pointer comparisons to work as expected
5979 then they should avoid writing weird assembly. */
5980 if (SYMBOL_CALLS_LOCAL (info, h))
5981 {
5982 struct elf_dyn_relocs **pp;
5983
5984 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5985 {
5986 p->count -= p->pc_count;
5987 p->pc_count = 0;
5988 if (p->count == 0)
5989 *pp = p->next;
5990 else
5991 pp = &p->next;
5992 }
5993 }
5994
5995 if (htab->is_vxworks)
5996 {
5997 struct elf_dyn_relocs **pp;
5998
5999 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6000 {
6001 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6002 *pp = p->next;
6003 else
6004 pp = &p->next;
6005 }
6006 }
6007
6008 /* Discard relocs on undefined symbols that must be local. */
6009 if (eh->dyn_relocs != NULL
6010 && h->root.type == bfd_link_hash_undefined
6011 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6012 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6013 eh->dyn_relocs = NULL;
6014
6015 /* Also discard relocs on undefined weak syms with non-default
6016 visibility. */
6017 if (eh->dyn_relocs != NULL
6018 && h->root.type == bfd_link_hash_undefweak)
6019 {
6020 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6021 eh->dyn_relocs = NULL;
6022
6023 /* Make sure undefined weak symbols are output as a dynamic
6024 symbol in PIEs. */
6025 else if (h->dynindx == -1
6026 && !h->forced_local
6027 && !h->def_regular)
6028 {
6029 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6030 return FALSE;
6031 }
6032 }
6033 }
6034 else if (ELIMINATE_COPY_RELOCS)
6035 {
6036 /* For the non-shared case, discard space for relocs against
6037 symbols which turn out to need copy relocs or are not
6038 dynamic. */
6039
6040 if (!h->non_got_ref
6041 && !h->def_regular)
6042 {
6043 /* Make sure this symbol is output as a dynamic symbol.
6044 Undefined weak syms won't yet be marked as dynamic. */
6045 if (h->dynindx == -1
6046 && !h->forced_local)
6047 {
6048 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6049 return FALSE;
6050 }
6051
6052 /* If that succeeded, we know we'll be keeping all the
6053 relocs. */
6054 if (h->dynindx != -1)
6055 goto keep;
6056 }
6057
6058 eh->dyn_relocs = NULL;
6059
6060 keep: ;
6061 }
6062
6063 /* Finally, allocate space. */
6064 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6065 {
6066 asection *sreloc = elf_section_data (p->sec)->sreloc;
6067 if (eh->elf.type == STT_GNU_IFUNC)
6068 sreloc = htab->reliplt;
6069 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6070 }
6071
6072 return TRUE;
6073 }
6074
6075 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6076 read-only sections. */
6077
6078 static bfd_boolean
6079 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6080 {
6081 if (h->root.type == bfd_link_hash_indirect)
6082 return TRUE;
6083
6084 if (readonly_dynrelocs (h))
6085 {
6086 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6087
6088 /* Not an error, just cut short the traversal. */
6089 return FALSE;
6090 }
6091 return TRUE;
6092 }
6093
6094 static const unsigned char glink_eh_frame_cie[] =
6095 {
6096 0, 0, 0, 16, /* length. */
6097 0, 0, 0, 0, /* id. */
6098 1, /* CIE version. */
6099 'z', 'R', 0, /* Augmentation string. */
6100 4, /* Code alignment. */
6101 0x7c, /* Data alignment. */
6102 65, /* RA reg. */
6103 1, /* Augmentation size. */
6104 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6105 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6106 };
6107
6108 /* Set the sizes of the dynamic sections. */
6109
6110 static bfd_boolean
6111 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6112 struct bfd_link_info *info)
6113 {
6114 struct ppc_elf_link_hash_table *htab;
6115 asection *s;
6116 bfd_boolean relocs;
6117 bfd *ibfd;
6118
6119 #ifdef DEBUG
6120 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6121 #endif
6122
6123 htab = ppc_elf_hash_table (info);
6124 BFD_ASSERT (htab->elf.dynobj != NULL);
6125
6126 if (elf_hash_table (info)->dynamic_sections_created)
6127 {
6128 /* Set the contents of the .interp section to the interpreter. */
6129 if (info->executable)
6130 {
6131 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6132 BFD_ASSERT (s != NULL);
6133 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6134 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6135 }
6136 }
6137
6138 if (htab->plt_type == PLT_OLD)
6139 htab->got_header_size = 16;
6140 else if (htab->plt_type == PLT_NEW)
6141 htab->got_header_size = 12;
6142
6143 /* Set up .got offsets for local syms, and space for local dynamic
6144 relocs. */
6145 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6146 {
6147 bfd_signed_vma *local_got;
6148 bfd_signed_vma *end_local_got;
6149 struct plt_entry **local_plt;
6150 struct plt_entry **end_local_plt;
6151 char *lgot_masks;
6152 bfd_size_type locsymcount;
6153 Elf_Internal_Shdr *symtab_hdr;
6154
6155 if (!is_ppc_elf (ibfd))
6156 continue;
6157
6158 for (s = ibfd->sections; s != NULL; s = s->next)
6159 {
6160 struct ppc_dyn_relocs *p;
6161
6162 for (p = ((struct ppc_dyn_relocs *)
6163 elf_section_data (s)->local_dynrel);
6164 p != NULL;
6165 p = p->next)
6166 {
6167 if (!bfd_is_abs_section (p->sec)
6168 && bfd_is_abs_section (p->sec->output_section))
6169 {
6170 /* Input section has been discarded, either because
6171 it is a copy of a linkonce section or due to
6172 linker script /DISCARD/, so we'll be discarding
6173 the relocs too. */
6174 }
6175 else if (htab->is_vxworks
6176 && strcmp (p->sec->output_section->name,
6177 ".tls_vars") == 0)
6178 {
6179 /* Relocations in vxworks .tls_vars sections are
6180 handled specially by the loader. */
6181 }
6182 else if (p->count != 0)
6183 {
6184 asection *sreloc = elf_section_data (p->sec)->sreloc;
6185 if (p->ifunc)
6186 sreloc = htab->reliplt;
6187 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6188 if ((p->sec->output_section->flags
6189 & (SEC_READONLY | SEC_ALLOC))
6190 == (SEC_READONLY | SEC_ALLOC))
6191 info->flags |= DF_TEXTREL;
6192 }
6193 }
6194 }
6195
6196 local_got = elf_local_got_refcounts (ibfd);
6197 if (!local_got)
6198 continue;
6199
6200 symtab_hdr = &elf_symtab_hdr (ibfd);
6201 locsymcount = symtab_hdr->sh_info;
6202 end_local_got = local_got + locsymcount;
6203 local_plt = (struct plt_entry **) end_local_got;
6204 end_local_plt = local_plt + locsymcount;
6205 lgot_masks = (char *) end_local_plt;
6206
6207 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6208 if (*local_got > 0)
6209 {
6210 unsigned int need = 0;
6211 if ((*lgot_masks & TLS_TLS) != 0)
6212 {
6213 if ((*lgot_masks & TLS_GD) != 0)
6214 need += 8;
6215 if ((*lgot_masks & TLS_LD) != 0)
6216 htab->tlsld_got.refcount += 1;
6217 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6218 need += 4;
6219 if ((*lgot_masks & TLS_DTPREL) != 0)
6220 need += 4;
6221 }
6222 else
6223 need += 4;
6224 if (need == 0)
6225 *local_got = (bfd_vma) -1;
6226 else
6227 {
6228 *local_got = allocate_got (htab, need);
6229 if (info->shared)
6230 {
6231 asection *srel = htab->relgot;
6232 if ((*lgot_masks & PLT_IFUNC) != 0)
6233 srel = htab->reliplt;
6234 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6235 }
6236 }
6237 }
6238 else
6239 *local_got = (bfd_vma) -1;
6240
6241 if (htab->is_vxworks)
6242 continue;
6243
6244 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6245 for (; local_plt < end_local_plt; ++local_plt)
6246 {
6247 struct plt_entry *ent;
6248 bfd_boolean doneone = FALSE;
6249 bfd_vma plt_offset = 0, glink_offset = 0;
6250
6251 for (ent = *local_plt; ent != NULL; ent = ent->next)
6252 if (ent->plt.refcount > 0)
6253 {
6254 s = htab->iplt;
6255
6256 if (!doneone)
6257 {
6258 plt_offset = s->size;
6259 s->size += 4;
6260 }
6261 ent->plt.offset = plt_offset;
6262
6263 s = htab->glink;
6264 if (!doneone || info->shared)
6265 {
6266 glink_offset = s->size;
6267 s->size += GLINK_ENTRY_SIZE;
6268 }
6269 ent->glink_offset = glink_offset;
6270
6271 if (!doneone)
6272 {
6273 htab->reliplt->size += sizeof (Elf32_External_Rela);
6274 doneone = TRUE;
6275 }
6276 }
6277 else
6278 ent->plt.offset = (bfd_vma) -1;
6279 }
6280 }
6281
6282 /* Allocate space for global sym dynamic relocs. */
6283 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6284
6285 if (htab->tlsld_got.refcount > 0)
6286 {
6287 htab->tlsld_got.offset = allocate_got (htab, 8);
6288 if (info->shared)
6289 htab->relgot->size += sizeof (Elf32_External_Rela);
6290 }
6291 else
6292 htab->tlsld_got.offset = (bfd_vma) -1;
6293
6294 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6295 {
6296 unsigned int g_o_t = 32768;
6297
6298 /* If we haven't allocated the header, do so now. When we get here,
6299 for old plt/got the got size will be 0 to 32764 (not allocated),
6300 or 32780 to 65536 (header allocated). For new plt/got, the
6301 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6302 if (htab->got->size <= 32768)
6303 {
6304 g_o_t = htab->got->size;
6305 if (htab->plt_type == PLT_OLD)
6306 g_o_t += 4;
6307 htab->got->size += htab->got_header_size;
6308 }
6309
6310 htab->elf.hgot->root.u.def.value = g_o_t;
6311 }
6312 if (info->shared)
6313 {
6314 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6315
6316 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6317 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6318 }
6319 if (info->emitrelocations)
6320 {
6321 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6322
6323 if (sda != NULL && sda->ref_regular)
6324 sda->root.u.def.section->flags |= SEC_KEEP;
6325 sda = htab->sdata[1].sym;
6326 if (sda != NULL && sda->ref_regular)
6327 sda->root.u.def.section->flags |= SEC_KEEP;
6328 }
6329
6330 if (htab->glink != NULL
6331 && htab->glink->size != 0
6332 && htab->elf.dynamic_sections_created)
6333 {
6334 htab->glink_pltresolve = htab->glink->size;
6335 /* Space for the branch table. */
6336 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6337 /* Pad out to align the start of PLTresolve. */
6338 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6339 ? 63 : 15);
6340 htab->glink->size += GLINK_PLTRESOLVE;
6341
6342 if (htab->params->emit_stub_syms)
6343 {
6344 struct elf_link_hash_entry *sh;
6345 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6346 TRUE, FALSE, FALSE);
6347 if (sh == NULL)
6348 return FALSE;
6349 if (sh->root.type == bfd_link_hash_new)
6350 {
6351 sh->root.type = bfd_link_hash_defined;
6352 sh->root.u.def.section = htab->glink;
6353 sh->root.u.def.value = htab->glink_pltresolve;
6354 sh->ref_regular = 1;
6355 sh->def_regular = 1;
6356 sh->ref_regular_nonweak = 1;
6357 sh->forced_local = 1;
6358 sh->non_elf = 0;
6359 }
6360 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6361 TRUE, FALSE, FALSE);
6362 if (sh == NULL)
6363 return FALSE;
6364 if (sh->root.type == bfd_link_hash_new)
6365 {
6366 sh->root.type = bfd_link_hash_defined;
6367 sh->root.u.def.section = htab->glink;
6368 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6369 sh->ref_regular = 1;
6370 sh->def_regular = 1;
6371 sh->ref_regular_nonweak = 1;
6372 sh->forced_local = 1;
6373 sh->non_elf = 0;
6374 }
6375 }
6376 }
6377
6378 if (htab->glink != NULL
6379 && htab->glink->size != 0
6380 && htab->glink_eh_frame != NULL
6381 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6382 && _bfd_elf_eh_frame_present (info))
6383 {
6384 s = htab->glink_eh_frame;
6385 s->size = sizeof (glink_eh_frame_cie) + 20;
6386 if (info->shared)
6387 {
6388 s->size += 4;
6389 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6390 s->size += 4;
6391 }
6392 }
6393
6394 /* We've now determined the sizes of the various dynamic sections.
6395 Allocate memory for them. */
6396 relocs = FALSE;
6397 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6398 {
6399 bfd_boolean strip_section = TRUE;
6400
6401 if ((s->flags & SEC_LINKER_CREATED) == 0)
6402 continue;
6403
6404 if (s == htab->plt
6405 || s == htab->got)
6406 {
6407 /* We'd like to strip these sections if they aren't needed, but if
6408 we've exported dynamic symbols from them we must leave them.
6409 It's too late to tell BFD to get rid of the symbols. */
6410 if (htab->elf.hplt != NULL)
6411 strip_section = FALSE;
6412 /* Strip this section if we don't need it; see the
6413 comment below. */
6414 }
6415 else if (s == htab->iplt
6416 || s == htab->glink
6417 || s == htab->glink_eh_frame
6418 || s == htab->sgotplt
6419 || s == htab->sbss
6420 || s == htab->dynbss
6421 || s == htab->dynsbss)
6422 {
6423 /* Strip these too. */
6424 }
6425 else if (s == htab->sdata[0].section
6426 || s == htab->sdata[1].section)
6427 {
6428 strip_section = (s->flags & SEC_KEEP) == 0;
6429 }
6430 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6431 ".rela"))
6432 {
6433 if (s->size != 0)
6434 {
6435 /* Remember whether there are any relocation sections. */
6436 relocs = TRUE;
6437
6438 /* We use the reloc_count field as a counter if we need
6439 to copy relocs into the output file. */
6440 s->reloc_count = 0;
6441 }
6442 }
6443 else
6444 {
6445 /* It's not one of our sections, so don't allocate space. */
6446 continue;
6447 }
6448
6449 if (s->size == 0 && strip_section)
6450 {
6451 /* If we don't need this section, strip it from the
6452 output file. This is mostly to handle .rela.bss and
6453 .rela.plt. We must create both sections in
6454 create_dynamic_sections, because they must be created
6455 before the linker maps input sections to output
6456 sections. The linker does that before
6457 adjust_dynamic_symbol is called, and it is that
6458 function which decides whether anything needs to go
6459 into these sections. */
6460 s->flags |= SEC_EXCLUDE;
6461 continue;
6462 }
6463
6464 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6465 continue;
6466
6467 /* Allocate memory for the section contents. */
6468 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6469 if (s->contents == NULL)
6470 return FALSE;
6471 }
6472
6473 if (htab->elf.dynamic_sections_created)
6474 {
6475 /* Add some entries to the .dynamic section. We fill in the
6476 values later, in ppc_elf_finish_dynamic_sections, but we
6477 must add the entries now so that we get the correct size for
6478 the .dynamic section. The DT_DEBUG entry is filled in by the
6479 dynamic linker and used by the debugger. */
6480 #define add_dynamic_entry(TAG, VAL) \
6481 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6482
6483 if (info->executable)
6484 {
6485 if (!add_dynamic_entry (DT_DEBUG, 0))
6486 return FALSE;
6487 }
6488
6489 if (htab->plt != NULL && htab->plt->size != 0)
6490 {
6491 if (!add_dynamic_entry (DT_PLTGOT, 0)
6492 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6493 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6494 || !add_dynamic_entry (DT_JMPREL, 0))
6495 return FALSE;
6496 }
6497
6498 if (htab->plt_type == PLT_NEW
6499 && htab->glink != NULL
6500 && htab->glink->size != 0)
6501 {
6502 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6503 return FALSE;
6504 if (!htab->params->no_tls_get_addr_opt
6505 && htab->tls_get_addr != NULL
6506 && htab->tls_get_addr->plt.plist != NULL
6507 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6508 return FALSE;
6509 }
6510
6511 if (relocs)
6512 {
6513 if (!add_dynamic_entry (DT_RELA, 0)
6514 || !add_dynamic_entry (DT_RELASZ, 0)
6515 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6516 return FALSE;
6517 }
6518
6519 /* If any dynamic relocs apply to a read-only section, then we
6520 need a DT_TEXTREL entry. */
6521 if ((info->flags & DF_TEXTREL) == 0)
6522 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6523 info);
6524
6525 if ((info->flags & DF_TEXTREL) != 0)
6526 {
6527 if (!add_dynamic_entry (DT_TEXTREL, 0))
6528 return FALSE;
6529 }
6530 if (htab->is_vxworks
6531 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6532 return FALSE;
6533 }
6534 #undef add_dynamic_entry
6535
6536 if (htab->glink_eh_frame != NULL
6537 && htab->glink_eh_frame->contents != NULL)
6538 {
6539 unsigned char *p = htab->glink_eh_frame->contents;
6540 bfd_vma val;
6541
6542 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6543 /* CIE length (rewrite in case little-endian). */
6544 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6545 p += sizeof (glink_eh_frame_cie);
6546 /* FDE length. */
6547 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6548 bfd_put_32 (htab->elf.dynobj, val, p);
6549 p += 4;
6550 /* CIE pointer. */
6551 val = p - htab->glink_eh_frame->contents;
6552 bfd_put_32 (htab->elf.dynobj, val, p);
6553 p += 4;
6554 /* Offset to .glink. Set later. */
6555 p += 4;
6556 /* .glink size. */
6557 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6558 p += 4;
6559 /* Augmentation. */
6560 p += 1;
6561
6562 if (info->shared
6563 && htab->elf.dynamic_sections_created)
6564 {
6565 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6566 if (adv < 64)
6567 *p++ = DW_CFA_advance_loc + adv;
6568 else if (adv < 256)
6569 {
6570 *p++ = DW_CFA_advance_loc1;
6571 *p++ = adv;
6572 }
6573 else if (adv < 65536)
6574 {
6575 *p++ = DW_CFA_advance_loc2;
6576 bfd_put_16 (htab->elf.dynobj, adv, p);
6577 p += 2;
6578 }
6579 else
6580 {
6581 *p++ = DW_CFA_advance_loc4;
6582 bfd_put_32 (htab->elf.dynobj, adv, p);
6583 p += 4;
6584 }
6585 *p++ = DW_CFA_register;
6586 *p++ = 65;
6587 p++;
6588 *p++ = DW_CFA_advance_loc + 4;
6589 *p++ = DW_CFA_restore_extended;
6590 *p++ = 65;
6591 }
6592 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6593 == htab->glink_eh_frame->size);
6594 }
6595
6596 return TRUE;
6597 }
6598
6599 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6600 if it looks like nothing is using them. */
6601
6602 static void
6603 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6604 {
6605 struct elf_link_hash_entry *sda = lsect->sym;
6606
6607 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6608 {
6609 asection *s;
6610
6611 s = bfd_get_section_by_name (output_bfd, lsect->name);
6612 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6613 {
6614 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6615 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6616 {
6617 sda->def_regular = 0;
6618 /* This is somewhat magic. See elf_link_output_extsym. */
6619 sda->ref_dynamic = 1;
6620 sda->forced_local = 0;
6621 }
6622 }
6623 }
6624 }
6625
6626 void
6627 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6628 {
6629 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6630
6631 if (htab != NULL)
6632 {
6633 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6634 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6635 }
6636 }
6637
6638
6639 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6640
6641 static bfd_boolean
6642 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6643 {
6644 if (h->plt.plist != NULL
6645 && !h->def_regular
6646 && (!h->pointer_equality_needed
6647 || !h->ref_regular_nonweak))
6648 return FALSE;
6649
6650 return _bfd_elf_hash_symbol (h);
6651 }
6652 \f
6653 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6654
6655 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6656 used for some functions that are allowed to break the ABI). */
6657 static const int shared_stub_entry[] =
6658 {
6659 0x7c0802a6, /* mflr 0 */
6660 0x429f0005, /* bcl 20, 31, .Lxxx */
6661 0x7d8802a6, /* mflr 12 */
6662 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6663 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6664 0x7c0803a6, /* mtlr 0 */
6665 0x7d8903a6, /* mtctr 12 */
6666 0x4e800420, /* bctr */
6667 };
6668
6669 static const int stub_entry[] =
6670 {
6671 0x3d800000, /* lis 12,xxx@ha */
6672 0x398c0000, /* addi 12,12,xxx@l */
6673 0x7d8903a6, /* mtctr 12 */
6674 0x4e800420, /* bctr */
6675 };
6676
6677 struct ppc_elf_relax_info
6678 {
6679 unsigned int workaround_size;
6680 };
6681
6682 /* This function implements long branch trampolines, and the ppc476
6683 icache bug workaround. Any section needing trampolines or patch
6684 space for the workaround has its size extended so that we can
6685 add trampolines at the end of the section. */
6686
6687 static bfd_boolean
6688 ppc_elf_relax_section (bfd *abfd,
6689 asection *isec,
6690 struct bfd_link_info *link_info,
6691 bfd_boolean *again)
6692 {
6693 struct one_fixup
6694 {
6695 struct one_fixup *next;
6696 asection *tsec;
6697 /* Final link, can use the symbol offset. For a
6698 relocatable link we use the symbol's index. */
6699 bfd_vma toff;
6700 bfd_vma trampoff;
6701 };
6702
6703 Elf_Internal_Shdr *symtab_hdr;
6704 bfd_byte *contents = NULL;
6705 Elf_Internal_Sym *isymbuf = NULL;
6706 Elf_Internal_Rela *internal_relocs = NULL;
6707 Elf_Internal_Rela *irel, *irelend = NULL;
6708 struct one_fixup *fixups = NULL;
6709 struct ppc_elf_relax_info *relax_info = NULL;
6710 unsigned changes = 0;
6711 bfd_boolean workaround_change;
6712 struct ppc_elf_link_hash_table *htab;
6713 bfd_size_type trampbase, trampoff, newsize;
6714 asection *got2;
6715 bfd_boolean maybe_pasted;
6716
6717 *again = FALSE;
6718
6719 /* No need to do anything with non-alloc or non-code sections. */
6720 if ((isec->flags & SEC_ALLOC) == 0
6721 || (isec->flags & SEC_CODE) == 0
6722 || (isec->flags & SEC_LINKER_CREATED) != 0
6723 || isec->size < 4)
6724 return TRUE;
6725
6726 /* We cannot represent the required PIC relocs in the output, so don't
6727 do anything. The linker doesn't support mixing -shared and -r
6728 anyway. */
6729 if (link_info->relocatable && link_info->shared)
6730 return TRUE;
6731
6732 htab = ppc_elf_hash_table (link_info);
6733 if (htab == NULL)
6734 return TRUE;
6735
6736 isec->size = (isec->size + 3) & -4;
6737 if (isec->rawsize == 0)
6738 isec->rawsize = isec->size;
6739 trampbase = isec->size;
6740
6741 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6742 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6743 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6744
6745 if (htab->params->ppc476_workaround)
6746 {
6747 if (elf_section_data (isec)->sec_info == NULL)
6748 {
6749 elf_section_data (isec)->sec_info
6750 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6751 if (elf_section_data (isec)->sec_info == NULL)
6752 return FALSE;
6753 }
6754 relax_info = elf_section_data (isec)->sec_info;
6755 trampbase -= relax_info->workaround_size;
6756 }
6757
6758 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6759 || strcmp (isec->output_section->name, ".fini") == 0);
6760 /* Space for a branch around any trampolines. */
6761 trampoff = trampbase;
6762 if (maybe_pasted && trampbase == isec->rawsize)
6763 trampoff += 4;
6764
6765 symtab_hdr = &elf_symtab_hdr (abfd);
6766
6767 if (htab->params->branch_trampolines)
6768 {
6769 /* Get a copy of the native relocations. */
6770 if (isec->reloc_count != 0)
6771 {
6772 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6773 link_info->keep_memory);
6774 if (internal_relocs == NULL)
6775 goto error_return;
6776 }
6777
6778 got2 = bfd_get_section_by_name (abfd, ".got2");
6779
6780 irelend = internal_relocs + isec->reloc_count;
6781 for (irel = internal_relocs; irel < irelend; irel++)
6782 {
6783 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6784 bfd_vma toff, roff;
6785 asection *tsec;
6786 struct one_fixup *f;
6787 size_t insn_offset = 0;
6788 bfd_vma max_branch_offset, val;
6789 bfd_byte *hit_addr;
6790 unsigned long t0;
6791 struct elf_link_hash_entry *h;
6792 struct plt_entry **plist;
6793 unsigned char sym_type;
6794
6795 switch (r_type)
6796 {
6797 case R_PPC_REL24:
6798 case R_PPC_LOCAL24PC:
6799 case R_PPC_PLTREL24:
6800 max_branch_offset = 1 << 25;
6801 break;
6802
6803 case R_PPC_REL14:
6804 case R_PPC_REL14_BRTAKEN:
6805 case R_PPC_REL14_BRNTAKEN:
6806 max_branch_offset = 1 << 15;
6807 break;
6808
6809 default:
6810 continue;
6811 }
6812
6813 /* Get the value of the symbol referred to by the reloc. */
6814 h = NULL;
6815 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6816 {
6817 /* A local symbol. */
6818 Elf_Internal_Sym *isym;
6819
6820 /* Read this BFD's local symbols. */
6821 if (isymbuf == NULL)
6822 {
6823 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6824 if (isymbuf == NULL)
6825 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6826 symtab_hdr->sh_info, 0,
6827 NULL, NULL, NULL);
6828 if (isymbuf == 0)
6829 goto error_return;
6830 }
6831 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6832 if (isym->st_shndx == SHN_UNDEF)
6833 tsec = bfd_und_section_ptr;
6834 else if (isym->st_shndx == SHN_ABS)
6835 tsec = bfd_abs_section_ptr;
6836 else if (isym->st_shndx == SHN_COMMON)
6837 tsec = bfd_com_section_ptr;
6838 else
6839 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6840
6841 toff = isym->st_value;
6842 sym_type = ELF_ST_TYPE (isym->st_info);
6843 }
6844 else
6845 {
6846 /* Global symbol handling. */
6847 unsigned long indx;
6848
6849 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6850 h = elf_sym_hashes (abfd)[indx];
6851
6852 while (h->root.type == bfd_link_hash_indirect
6853 || h->root.type == bfd_link_hash_warning)
6854 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6855
6856 if (h->root.type == bfd_link_hash_defined
6857 || h->root.type == bfd_link_hash_defweak)
6858 {
6859 tsec = h->root.u.def.section;
6860 toff = h->root.u.def.value;
6861 }
6862 else if (h->root.type == bfd_link_hash_undefined
6863 || h->root.type == bfd_link_hash_undefweak)
6864 {
6865 tsec = bfd_und_section_ptr;
6866 toff = link_info->relocatable ? indx : 0;
6867 }
6868 else
6869 continue;
6870
6871 /* If this branch is to __tls_get_addr then we may later
6872 optimise away the call. We won't be needing a long-
6873 branch stub in that case. */
6874 if (link_info->executable
6875 && !link_info->relocatable
6876 && h == htab->tls_get_addr
6877 && irel != internal_relocs)
6878 {
6879 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6880 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6881 unsigned int tls_mask = 0;
6882
6883 /* The previous reloc should be one of R_PPC_TLSGD or
6884 R_PPC_TLSLD, or for older object files, a reloc
6885 on the __tls_get_addr arg setup insn. Get tls
6886 mask bits from the symbol on that reloc. */
6887 if (t_symndx < symtab_hdr->sh_info)
6888 {
6889 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6890
6891 if (local_got_offsets != NULL)
6892 {
6893 struct plt_entry **local_plt = (struct plt_entry **)
6894 (local_got_offsets + symtab_hdr->sh_info);
6895 char *lgot_masks = (char *)
6896 (local_plt + symtab_hdr->sh_info);
6897 tls_mask = lgot_masks[t_symndx];
6898 }
6899 }
6900 else
6901 {
6902 struct elf_link_hash_entry *th
6903 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6904
6905 while (th->root.type == bfd_link_hash_indirect
6906 || th->root.type == bfd_link_hash_warning)
6907 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6908
6909 tls_mask
6910 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6911 }
6912
6913 /* The mask bits tell us if the call will be
6914 optimised away. */
6915 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6916 && (t_rtype == R_PPC_TLSGD
6917 || t_rtype == R_PPC_GOT_TLSGD16
6918 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6919 continue;
6920 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6921 && (t_rtype == R_PPC_TLSLD
6922 || t_rtype == R_PPC_GOT_TLSLD16
6923 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6924 continue;
6925 }
6926
6927 sym_type = h->type;
6928 }
6929
6930 /* The condition here under which we call find_plt_ent must
6931 match that in relocate_section. If we call find_plt_ent here
6932 but not in relocate_section, or vice versa, then the branch
6933 destination used here may be incorrect. */
6934 plist = NULL;
6935 if (h != NULL)
6936 {
6937 /* We know is_branch_reloc (r_type) is true. */
6938 if (h->type == STT_GNU_IFUNC
6939 || r_type == R_PPC_PLTREL24)
6940 plist = &h->plt.plist;
6941 }
6942 else if (sym_type == STT_GNU_IFUNC
6943 && elf_local_got_offsets (abfd) != NULL)
6944 {
6945 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6946 struct plt_entry **local_plt = (struct plt_entry **)
6947 (local_got_offsets + symtab_hdr->sh_info);
6948 plist = local_plt + ELF32_R_SYM (irel->r_info);
6949 }
6950 if (plist != NULL)
6951 {
6952 bfd_vma addend = 0;
6953 struct plt_entry *ent;
6954
6955 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6956 addend = irel->r_addend;
6957 ent = find_plt_ent (plist, got2, addend);
6958 if (ent != NULL)
6959 {
6960 if (htab->plt_type == PLT_NEW
6961 || h == NULL
6962 || !htab->elf.dynamic_sections_created
6963 || h->dynindx == -1)
6964 {
6965 tsec = htab->glink;
6966 toff = ent->glink_offset;
6967 }
6968 else
6969 {
6970 tsec = htab->plt;
6971 toff = ent->plt.offset;
6972 }
6973 }
6974 }
6975
6976 /* If the branch and target are in the same section, you have
6977 no hope of adding stubs. We'll error out later should the
6978 branch overflow. */
6979 if (tsec == isec)
6980 continue;
6981
6982 /* There probably isn't any reason to handle symbols in
6983 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6984 attribute for a code section, and we are only looking at
6985 branches. However, implement it correctly here as a
6986 reference for other target relax_section functions. */
6987 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6988 {
6989 /* At this stage in linking, no SEC_MERGE symbol has been
6990 adjusted, so all references to such symbols need to be
6991 passed through _bfd_merged_section_offset. (Later, in
6992 relocate_section, all SEC_MERGE symbols *except* for
6993 section symbols have been adjusted.)
6994
6995 gas may reduce relocations against symbols in SEC_MERGE
6996 sections to a relocation against the section symbol when
6997 the original addend was zero. When the reloc is against
6998 a section symbol we should include the addend in the
6999 offset passed to _bfd_merged_section_offset, since the
7000 location of interest is the original symbol. On the
7001 other hand, an access to "sym+addend" where "sym" is not
7002 a section symbol should not include the addend; Such an
7003 access is presumed to be an offset from "sym"; The
7004 location of interest is just "sym". */
7005 if (sym_type == STT_SECTION)
7006 toff += irel->r_addend;
7007
7008 toff
7009 = _bfd_merged_section_offset (abfd, &tsec,
7010 elf_section_data (tsec)->sec_info,
7011 toff);
7012
7013 if (sym_type != STT_SECTION)
7014 toff += irel->r_addend;
7015 }
7016 /* PLTREL24 addends are special. */
7017 else if (r_type != R_PPC_PLTREL24)
7018 toff += irel->r_addend;
7019
7020 /* Attempted -shared link of non-pic code loses. */
7021 if ((!link_info->relocatable
7022 && tsec == bfd_und_section_ptr)
7023 || tsec->output_section == NULL
7024 || (tsec->owner != NULL
7025 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7026 continue;
7027
7028 roff = irel->r_offset;
7029
7030 /* If the branch is in range, no need to do anything. */
7031 if (tsec != bfd_und_section_ptr
7032 && (!link_info->relocatable
7033 /* A relocatable link may have sections moved during
7034 final link, so do not presume they remain in range. */
7035 || tsec->output_section == isec->output_section))
7036 {
7037 bfd_vma symaddr, reladdr;
7038
7039 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7040 reladdr = isec->output_section->vma + isec->output_offset + roff;
7041 if (symaddr - reladdr + max_branch_offset
7042 < 2 * max_branch_offset)
7043 continue;
7044 }
7045
7046 /* Look for an existing fixup to this address. */
7047 for (f = fixups; f ; f = f->next)
7048 if (f->tsec == tsec && f->toff == toff)
7049 break;
7050
7051 if (f == NULL)
7052 {
7053 size_t size;
7054 unsigned long stub_rtype;
7055
7056 val = trampoff - roff;
7057 if (val >= max_branch_offset)
7058 /* Oh dear, we can't reach a trampoline. Don't try to add
7059 one. We'll report an error later. */
7060 continue;
7061
7062 if (link_info->shared)
7063 {
7064 size = 4 * ARRAY_SIZE (shared_stub_entry);
7065 insn_offset = 12;
7066 }
7067 else
7068 {
7069 size = 4 * ARRAY_SIZE (stub_entry);
7070 insn_offset = 0;
7071 }
7072 stub_rtype = R_PPC_RELAX;
7073 if (tsec == htab->plt
7074 || tsec == htab->glink)
7075 {
7076 stub_rtype = R_PPC_RELAX_PLT;
7077 if (r_type == R_PPC_PLTREL24)
7078 stub_rtype = R_PPC_RELAX_PLTREL24;
7079 }
7080
7081 /* Hijack the old relocation. Since we need two
7082 relocations for this use a "composite" reloc. */
7083 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7084 stub_rtype);
7085 irel->r_offset = trampoff + insn_offset;
7086 if (r_type == R_PPC_PLTREL24
7087 && stub_rtype != R_PPC_RELAX_PLTREL24)
7088 irel->r_addend = 0;
7089
7090 /* Record the fixup so we don't do it again this section. */
7091 f = bfd_malloc (sizeof (*f));
7092 f->next = fixups;
7093 f->tsec = tsec;
7094 f->toff = toff;
7095 f->trampoff = trampoff;
7096 fixups = f;
7097
7098 trampoff += size;
7099 changes++;
7100 }
7101 else
7102 {
7103 val = f->trampoff - roff;
7104 if (val >= max_branch_offset)
7105 continue;
7106
7107 /* Nop out the reloc, since we're finalizing things here. */
7108 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7109 }
7110
7111 /* Get the section contents. */
7112 if (contents == NULL)
7113 {
7114 /* Get cached copy if it exists. */
7115 if (elf_section_data (isec)->this_hdr.contents != NULL)
7116 contents = elf_section_data (isec)->this_hdr.contents;
7117 /* Go get them off disk. */
7118 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7119 goto error_return;
7120 }
7121
7122 /* Fix up the existing branch to hit the trampoline. */
7123 hit_addr = contents + roff;
7124 switch (r_type)
7125 {
7126 case R_PPC_REL24:
7127 case R_PPC_LOCAL24PC:
7128 case R_PPC_PLTREL24:
7129 t0 = bfd_get_32 (abfd, hit_addr);
7130 t0 &= ~0x3fffffc;
7131 t0 |= val & 0x3fffffc;
7132 bfd_put_32 (abfd, t0, hit_addr);
7133 break;
7134
7135 case R_PPC_REL14:
7136 case R_PPC_REL14_BRTAKEN:
7137 case R_PPC_REL14_BRNTAKEN:
7138 t0 = bfd_get_32 (abfd, hit_addr);
7139 t0 &= ~0xfffc;
7140 t0 |= val & 0xfffc;
7141 bfd_put_32 (abfd, t0, hit_addr);
7142 break;
7143 }
7144 }
7145
7146 while (fixups != NULL)
7147 {
7148 struct one_fixup *f = fixups;
7149 fixups = fixups->next;
7150 free (f);
7151 }
7152 }
7153
7154 workaround_change = FALSE;
7155 newsize = trampoff;
7156 if (htab->params->ppc476_workaround
7157 && (!link_info->relocatable
7158 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7159 {
7160 bfd_vma addr, end_addr;
7161 unsigned int crossings;
7162 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7163
7164 addr = isec->output_section->vma + isec->output_offset;
7165 end_addr = addr + trampoff - 1;
7166 addr &= -pagesize;
7167 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7168 if (crossings != 0)
7169 {
7170 /* Keep space aligned, to ensure the patch code itself does
7171 not cross a page. Don't decrease size calculated on a
7172 previous pass as otherwise we might never settle on a layout. */
7173 newsize = 15 - (end_addr & 15);
7174 newsize += crossings * 16;
7175 if (relax_info->workaround_size < newsize)
7176 {
7177 relax_info->workaround_size = newsize;
7178 workaround_change = TRUE;
7179 }
7180 /* Ensure relocate_section is called. */
7181 isec->flags |= SEC_RELOC;
7182 }
7183 newsize = trampoff + relax_info->workaround_size;
7184 }
7185
7186 if (changes || workaround_change)
7187 isec->size = newsize;
7188
7189 if (isymbuf != NULL
7190 && symtab_hdr->contents != (unsigned char *) isymbuf)
7191 {
7192 if (! link_info->keep_memory)
7193 free (isymbuf);
7194 else
7195 {
7196 /* Cache the symbols for elf_link_input_bfd. */
7197 symtab_hdr->contents = (unsigned char *) isymbuf;
7198 }
7199 }
7200
7201 if (contents != NULL
7202 && elf_section_data (isec)->this_hdr.contents != contents)
7203 {
7204 if (!changes && !link_info->keep_memory)
7205 free (contents);
7206 else
7207 {
7208 /* Cache the section contents for elf_link_input_bfd. */
7209 elf_section_data (isec)->this_hdr.contents = contents;
7210 }
7211 }
7212
7213 if (changes != 0)
7214 {
7215 /* Append sufficient NOP relocs so we can write out relocation
7216 information for the trampolines. */
7217 Elf_Internal_Shdr *rel_hdr;
7218 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7219 * sizeof (*new_relocs));
7220 unsigned ix;
7221
7222 if (!new_relocs)
7223 goto error_return;
7224 memcpy (new_relocs, internal_relocs,
7225 isec->reloc_count * sizeof (*new_relocs));
7226 for (ix = changes; ix--;)
7227 {
7228 irel = new_relocs + ix + isec->reloc_count;
7229
7230 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7231 }
7232 if (internal_relocs != elf_section_data (isec)->relocs)
7233 free (internal_relocs);
7234 elf_section_data (isec)->relocs = new_relocs;
7235 isec->reloc_count += changes;
7236 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7237 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7238 }
7239 else if (internal_relocs != NULL
7240 && elf_section_data (isec)->relocs != internal_relocs)
7241 free (internal_relocs);
7242
7243 *again = changes != 0 || workaround_change;
7244 return TRUE;
7245
7246 error_return:
7247 while (fixups != NULL)
7248 {
7249 struct one_fixup *f = fixups;
7250 fixups = fixups->next;
7251 free (f);
7252 }
7253 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7254 free (isymbuf);
7255 if (contents != NULL
7256 && elf_section_data (isec)->this_hdr.contents != contents)
7257 free (contents);
7258 if (internal_relocs != NULL
7259 && elf_section_data (isec)->relocs != internal_relocs)
7260 free (internal_relocs);
7261 return FALSE;
7262 }
7263 \f
7264 /* What to do when ld finds relocations against symbols defined in
7265 discarded sections. */
7266
7267 static unsigned int
7268 ppc_elf_action_discarded (asection *sec)
7269 {
7270 if (strcmp (".fixup", sec->name) == 0)
7271 return 0;
7272
7273 if (strcmp (".got2", sec->name) == 0)
7274 return 0;
7275
7276 return _bfd_elf_default_action_discarded (sec);
7277 }
7278 \f
7279 /* Fill in the address for a pointer generated in a linker section. */
7280
7281 static bfd_vma
7282 elf_finish_pointer_linker_section (bfd *input_bfd,
7283 elf_linker_section_t *lsect,
7284 struct elf_link_hash_entry *h,
7285 bfd_vma relocation,
7286 const Elf_Internal_Rela *rel)
7287 {
7288 elf_linker_section_pointers_t *linker_section_ptr;
7289
7290 BFD_ASSERT (lsect != NULL);
7291
7292 if (h != NULL)
7293 {
7294 /* Handle global symbol. */
7295 struct ppc_elf_link_hash_entry *eh;
7296
7297 eh = (struct ppc_elf_link_hash_entry *) h;
7298 BFD_ASSERT (eh->elf.def_regular);
7299 linker_section_ptr = eh->linker_section_pointer;
7300 }
7301 else
7302 {
7303 /* Handle local symbol. */
7304 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7305
7306 BFD_ASSERT (is_ppc_elf (input_bfd));
7307 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7308 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7309 }
7310
7311 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7312 rel->r_addend,
7313 lsect);
7314 BFD_ASSERT (linker_section_ptr != NULL);
7315
7316 /* Offset will always be a multiple of four, so use the bottom bit
7317 as a "written" flag. */
7318 if ((linker_section_ptr->offset & 1) == 0)
7319 {
7320 bfd_put_32 (lsect->section->owner,
7321 relocation + linker_section_ptr->addend,
7322 lsect->section->contents + linker_section_ptr->offset);
7323 linker_section_ptr->offset += 1;
7324 }
7325
7326 relocation = (lsect->section->output_section->vma
7327 + lsect->section->output_offset
7328 + linker_section_ptr->offset - 1
7329 - SYM_VAL (lsect->sym));
7330
7331 #ifdef DEBUG
7332 fprintf (stderr,
7333 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7334 lsect->name, (long) relocation, (long) relocation);
7335 #endif
7336
7337 return relocation;
7338 }
7339
7340 #define PPC_LO(v) ((v) & 0xffff)
7341 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7342 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7343
7344 static void
7345 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7346 struct bfd_link_info *info)
7347 {
7348 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7349 bfd *output_bfd = info->output_bfd;
7350 bfd_vma plt;
7351
7352 plt = ((ent->plt.offset & ~1)
7353 + plt_sec->output_section->vma
7354 + plt_sec->output_offset);
7355
7356 if (info->shared)
7357 {
7358 bfd_vma got = 0;
7359
7360 if (ent->addend >= 32768)
7361 got = (ent->addend
7362 + ent->sec->output_section->vma
7363 + ent->sec->output_offset);
7364 else if (htab->elf.hgot != NULL)
7365 got = SYM_VAL (htab->elf.hgot);
7366
7367 plt -= got;
7368
7369 if (plt + 0x8000 < 0x10000)
7370 {
7371 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7372 p += 4;
7373 bfd_put_32 (output_bfd, MTCTR_11, p);
7374 p += 4;
7375 bfd_put_32 (output_bfd, BCTR, p);
7376 p += 4;
7377 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7378 p += 4;
7379 }
7380 else
7381 {
7382 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7383 p += 4;
7384 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7385 p += 4;
7386 bfd_put_32 (output_bfd, MTCTR_11, p);
7387 p += 4;
7388 bfd_put_32 (output_bfd, BCTR, p);
7389 p += 4;
7390 }
7391 }
7392 else
7393 {
7394 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7395 p += 4;
7396 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7397 p += 4;
7398 bfd_put_32 (output_bfd, MTCTR_11, p);
7399 p += 4;
7400 bfd_put_32 (output_bfd, BCTR, p);
7401 p += 4;
7402 }
7403 }
7404
7405 /* Return true if symbol is defined statically. */
7406
7407 static bfd_boolean
7408 is_static_defined (struct elf_link_hash_entry *h)
7409 {
7410 return ((h->root.type == bfd_link_hash_defined
7411 || h->root.type == bfd_link_hash_defweak)
7412 && h->root.u.def.section != NULL
7413 && h->root.u.def.section->output_section != NULL);
7414 }
7415
7416 /* If INSN is an opcode that may be used with an @tls operand, return
7417 the transformed insn for TLS optimisation, otherwise return 0. If
7418 REG is non-zero only match an insn with RB or RA equal to REG. */
7419
7420 unsigned int
7421 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7422 {
7423 unsigned int rtra;
7424
7425 if ((insn & (0x3f << 26)) != 31 << 26)
7426 return 0;
7427
7428 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7429 rtra = insn & ((1 << 26) - (1 << 16));
7430 else if (((insn >> 16) & 0x1f) == reg)
7431 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7432 else
7433 return 0;
7434
7435 if ((insn & (0x3ff << 1)) == 266 << 1)
7436 /* add -> addi. */
7437 insn = 14 << 26;
7438 else if ((insn & (0x1f << 1)) == 23 << 1
7439 && ((insn & (0x1f << 6)) < 14 << 6
7440 || ((insn & (0x1f << 6)) >= 16 << 6
7441 && (insn & (0x1f << 6)) < 24 << 6)))
7442 /* load and store indexed -> dform. */
7443 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7444 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7445 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7446 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7447 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7448 /* lwax -> lwa. */
7449 insn = (58 << 26) | 2;
7450 else
7451 return 0;
7452 insn |= rtra;
7453 return insn;
7454 }
7455
7456 /* If INSN is an opcode that may be used with an @tprel operand, return
7457 the transformed insn for an undefined weak symbol, ie. with the
7458 thread pointer REG operand removed. Otherwise return 0. */
7459
7460 unsigned int
7461 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7462 {
7463 if ((insn & (0x1f << 16)) == reg << 16
7464 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7465 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7466 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7467 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7468 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7469 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7470 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7471 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7472 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7473 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7474 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7475 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7476 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7477 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7478 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7479 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7480 && (insn & 3) != 1)
7481 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7482 && ((insn & 3) == 0 || (insn & 3) == 3))))
7483 {
7484 insn &= ~(0x1f << 16);
7485 }
7486 else if ((insn & (0x1f << 21)) == reg << 21
7487 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7488 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7489 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7490 {
7491 insn &= ~(0x1f << 21);
7492 insn |= (insn & (0x1f << 16)) << 5;
7493 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7494 insn -= 2 >> 26; /* convert to ori,oris */
7495 }
7496 else
7497 insn = 0;
7498 return insn;
7499 }
7500
7501 static bfd_boolean
7502 is_insn_ds_form (unsigned int insn)
7503 {
7504 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7505 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7506 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7507 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7508 }
7509
7510 static bfd_boolean
7511 is_insn_dq_form (unsigned int insn)
7512 {
7513 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7514 }
7515
7516 /* The RELOCATE_SECTION function is called by the ELF backend linker
7517 to handle the relocations for a section.
7518
7519 The relocs are always passed as Rela structures; if the section
7520 actually uses Rel structures, the r_addend field will always be
7521 zero.
7522
7523 This function is responsible for adjust the section contents as
7524 necessary, and (if using Rela relocs and generating a
7525 relocatable output file) adjusting the reloc addend as
7526 necessary.
7527
7528 This function does not have to worry about setting the reloc
7529 address or the reloc symbol index.
7530
7531 LOCAL_SYMS is a pointer to the swapped in local symbols.
7532
7533 LOCAL_SECTIONS is an array giving the section in the input file
7534 corresponding to the st_shndx field of each local symbol.
7535
7536 The global hash table entry for the global symbols can be found
7537 via elf_sym_hashes (input_bfd).
7538
7539 When generating relocatable output, this function must handle
7540 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7541 going to be the section symbol corresponding to the output
7542 section, which means that the addend must be adjusted
7543 accordingly. */
7544
7545 static bfd_boolean
7546 ppc_elf_relocate_section (bfd *output_bfd,
7547 struct bfd_link_info *info,
7548 bfd *input_bfd,
7549 asection *input_section,
7550 bfd_byte *contents,
7551 Elf_Internal_Rela *relocs,
7552 Elf_Internal_Sym *local_syms,
7553 asection **local_sections)
7554 {
7555 Elf_Internal_Shdr *symtab_hdr;
7556 struct elf_link_hash_entry **sym_hashes;
7557 struct ppc_elf_link_hash_table *htab;
7558 Elf_Internal_Rela *rel;
7559 Elf_Internal_Rela *relend;
7560 Elf_Internal_Rela outrel;
7561 asection *got2;
7562 bfd_vma *local_got_offsets;
7563 bfd_boolean ret = TRUE;
7564 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7565 bfd_boolean is_vxworks_tls;
7566
7567 #ifdef DEBUG
7568 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7569 "%ld relocations%s",
7570 input_bfd, input_section,
7571 (long) input_section->reloc_count,
7572 (info->relocatable) ? " (relocatable)" : "");
7573 #endif
7574
7575 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7576
7577 /* Initialize howto table if not already done. */
7578 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7579 ppc_elf_howto_init ();
7580
7581 htab = ppc_elf_hash_table (info);
7582 local_got_offsets = elf_local_got_offsets (input_bfd);
7583 symtab_hdr = &elf_symtab_hdr (input_bfd);
7584 sym_hashes = elf_sym_hashes (input_bfd);
7585 /* We have to handle relocations in vxworks .tls_vars sections
7586 specially, because the dynamic loader is 'weird'. */
7587 is_vxworks_tls = (htab->is_vxworks && info->shared
7588 && !strcmp (input_section->output_section->name,
7589 ".tls_vars"));
7590 rel = relocs;
7591 relend = relocs + input_section->reloc_count;
7592 for (; rel < relend; rel++)
7593 {
7594 enum elf_ppc_reloc_type r_type;
7595 bfd_vma addend;
7596 bfd_reloc_status_type r;
7597 Elf_Internal_Sym *sym;
7598 asection *sec;
7599 struct elf_link_hash_entry *h;
7600 const char *sym_name;
7601 reloc_howto_type *howto;
7602 unsigned long r_symndx;
7603 bfd_vma relocation;
7604 bfd_vma branch_bit, from;
7605 bfd_boolean unresolved_reloc;
7606 bfd_boolean warned;
7607 unsigned int tls_type, tls_mask, tls_gd;
7608 struct plt_entry **ifunc;
7609 struct reloc_howto_struct alt_howto;
7610
7611 r_type = ELF32_R_TYPE (rel->r_info);
7612 sym = NULL;
7613 sec = NULL;
7614 h = NULL;
7615 unresolved_reloc = FALSE;
7616 warned = FALSE;
7617 r_symndx = ELF32_R_SYM (rel->r_info);
7618
7619 if (r_symndx < symtab_hdr->sh_info)
7620 {
7621 sym = local_syms + r_symndx;
7622 sec = local_sections[r_symndx];
7623 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7624
7625 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7626 }
7627 else
7628 {
7629 bfd_boolean ignored;
7630
7631 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7632 r_symndx, symtab_hdr, sym_hashes,
7633 h, sec, relocation,
7634 unresolved_reloc, warned, ignored);
7635
7636 sym_name = h->root.root.string;
7637 }
7638
7639 if (sec != NULL && discarded_section (sec))
7640 {
7641 /* For relocs against symbols from removed linkonce sections,
7642 or sections discarded by a linker script, we just want the
7643 section contents zeroed. Avoid any special processing. */
7644 howto = NULL;
7645 if (r_type < R_PPC_max)
7646 howto = ppc_elf_howto_table[r_type];
7647 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7648 rel, 1, relend, howto, 0, contents);
7649 }
7650
7651 if (info->relocatable)
7652 {
7653 if (got2 != NULL
7654 && r_type == R_PPC_PLTREL24
7655 && rel->r_addend != 0)
7656 {
7657 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7658 addend specifies the GOT pointer offset within .got2. */
7659 rel->r_addend += got2->output_offset;
7660 }
7661 if (r_type != R_PPC_RELAX_PLT
7662 && r_type != R_PPC_RELAX_PLTREL24
7663 && r_type != R_PPC_RELAX)
7664 continue;
7665 }
7666
7667 /* TLS optimizations. Replace instruction sequences and relocs
7668 based on information we collected in tls_optimize. We edit
7669 RELOCS so that --emit-relocs will output something sensible
7670 for the final instruction stream. */
7671 tls_mask = 0;
7672 tls_gd = 0;
7673 if (h != NULL)
7674 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7675 else if (local_got_offsets != NULL)
7676 {
7677 struct plt_entry **local_plt;
7678 char *lgot_masks;
7679 local_plt
7680 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7681 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7682 tls_mask = lgot_masks[r_symndx];
7683 }
7684
7685 /* Ensure reloc mapping code below stays sane. */
7686 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7687 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7688 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7689 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7690 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7691 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7692 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7693 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7694 abort ();
7695 switch (r_type)
7696 {
7697 default:
7698 break;
7699
7700 case R_PPC_GOT_TPREL16:
7701 case R_PPC_GOT_TPREL16_LO:
7702 if ((tls_mask & TLS_TLS) != 0
7703 && (tls_mask & TLS_TPREL) == 0)
7704 {
7705 bfd_vma insn;
7706
7707 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7708 insn &= 31 << 21;
7709 insn |= 0x3c020000; /* addis 0,2,0 */
7710 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7711 r_type = R_PPC_TPREL16_HA;
7712 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7713 }
7714 break;
7715
7716 case R_PPC_TLS:
7717 if ((tls_mask & TLS_TLS) != 0
7718 && (tls_mask & TLS_TPREL) == 0)
7719 {
7720 bfd_vma insn;
7721
7722 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7723 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7724 if (insn == 0)
7725 abort ();
7726 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7727 r_type = R_PPC_TPREL16_LO;
7728 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7729
7730 /* Was PPC_TLS which sits on insn boundary, now
7731 PPC_TPREL16_LO which is at low-order half-word. */
7732 rel->r_offset += d_offset;
7733 }
7734 break;
7735
7736 case R_PPC_GOT_TLSGD16_HI:
7737 case R_PPC_GOT_TLSGD16_HA:
7738 tls_gd = TLS_TPRELGD;
7739 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7740 goto tls_gdld_hi;
7741 break;
7742
7743 case R_PPC_GOT_TLSLD16_HI:
7744 case R_PPC_GOT_TLSLD16_HA:
7745 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7746 {
7747 tls_gdld_hi:
7748 if ((tls_mask & tls_gd) != 0)
7749 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7750 + R_PPC_GOT_TPREL16);
7751 else
7752 {
7753 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7754 rel->r_offset -= d_offset;
7755 r_type = R_PPC_NONE;
7756 }
7757 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7758 }
7759 break;
7760
7761 case R_PPC_GOT_TLSGD16:
7762 case R_PPC_GOT_TLSGD16_LO:
7763 tls_gd = TLS_TPRELGD;
7764 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7765 goto tls_ldgd_opt;
7766 break;
7767
7768 case R_PPC_GOT_TLSLD16:
7769 case R_PPC_GOT_TLSLD16_LO:
7770 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7771 {
7772 unsigned int insn1, insn2;
7773 bfd_vma offset;
7774
7775 tls_ldgd_opt:
7776 offset = (bfd_vma) -1;
7777 /* If not using the newer R_PPC_TLSGD/LD to mark
7778 __tls_get_addr calls, we must trust that the call
7779 stays with its arg setup insns, ie. that the next
7780 reloc is the __tls_get_addr call associated with
7781 the current reloc. Edit both insns. */
7782 if (input_section->has_tls_get_addr_call
7783 && rel + 1 < relend
7784 && branch_reloc_hash_match (input_bfd, rel + 1,
7785 htab->tls_get_addr))
7786 offset = rel[1].r_offset;
7787 if ((tls_mask & tls_gd) != 0)
7788 {
7789 /* IE */
7790 insn1 = bfd_get_32 (output_bfd,
7791 contents + rel->r_offset - d_offset);
7792 insn1 &= (1 << 26) - 1;
7793 insn1 |= 32 << 26; /* lwz */
7794 if (offset != (bfd_vma) -1)
7795 {
7796 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7797 insn2 = 0x7c631214; /* add 3,3,2 */
7798 bfd_put_32 (output_bfd, insn2, contents + offset);
7799 }
7800 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7801 + R_PPC_GOT_TPREL16);
7802 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7803 }
7804 else
7805 {
7806 /* LE */
7807 insn1 = 0x3c620000; /* addis 3,2,0 */
7808 if (tls_gd == 0)
7809 {
7810 /* Was an LD reloc. */
7811 for (r_symndx = 0;
7812 r_symndx < symtab_hdr->sh_info;
7813 r_symndx++)
7814 if (local_sections[r_symndx] == sec)
7815 break;
7816 if (r_symndx >= symtab_hdr->sh_info)
7817 r_symndx = STN_UNDEF;
7818 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7819 if (r_symndx != STN_UNDEF)
7820 rel->r_addend -= (local_syms[r_symndx].st_value
7821 + sec->output_offset
7822 + sec->output_section->vma);
7823 }
7824 r_type = R_PPC_TPREL16_HA;
7825 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7826 if (offset != (bfd_vma) -1)
7827 {
7828 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7829 rel[1].r_offset = offset + d_offset;
7830 rel[1].r_addend = rel->r_addend;
7831 insn2 = 0x38630000; /* addi 3,3,0 */
7832 bfd_put_32 (output_bfd, insn2, contents + offset);
7833 }
7834 }
7835 bfd_put_32 (output_bfd, insn1,
7836 contents + rel->r_offset - d_offset);
7837 if (tls_gd == 0)
7838 {
7839 /* We changed the symbol on an LD reloc. Start over
7840 in order to get h, sym, sec etc. right. */
7841 rel--;
7842 continue;
7843 }
7844 }
7845 break;
7846
7847 case R_PPC_TLSGD:
7848 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7849 {
7850 unsigned int insn2;
7851 bfd_vma offset = rel->r_offset;
7852
7853 if ((tls_mask & TLS_TPRELGD) != 0)
7854 {
7855 /* IE */
7856 r_type = R_PPC_NONE;
7857 insn2 = 0x7c631214; /* add 3,3,2 */
7858 }
7859 else
7860 {
7861 /* LE */
7862 r_type = R_PPC_TPREL16_LO;
7863 rel->r_offset += d_offset;
7864 insn2 = 0x38630000; /* addi 3,3,0 */
7865 }
7866 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7867 bfd_put_32 (output_bfd, insn2, contents + offset);
7868 /* Zap the reloc on the _tls_get_addr call too. */
7869 BFD_ASSERT (offset == rel[1].r_offset);
7870 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7871 }
7872 break;
7873
7874 case R_PPC_TLSLD:
7875 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7876 {
7877 unsigned int insn2;
7878
7879 for (r_symndx = 0;
7880 r_symndx < symtab_hdr->sh_info;
7881 r_symndx++)
7882 if (local_sections[r_symndx] == sec)
7883 break;
7884 if (r_symndx >= symtab_hdr->sh_info)
7885 r_symndx = STN_UNDEF;
7886 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7887 if (r_symndx != STN_UNDEF)
7888 rel->r_addend -= (local_syms[r_symndx].st_value
7889 + sec->output_offset
7890 + sec->output_section->vma);
7891
7892 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7893 rel->r_offset += d_offset;
7894 insn2 = 0x38630000; /* addi 3,3,0 */
7895 bfd_put_32 (output_bfd, insn2,
7896 contents + rel->r_offset - d_offset);
7897 /* Zap the reloc on the _tls_get_addr call too. */
7898 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7899 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7900 rel--;
7901 continue;
7902 }
7903 break;
7904 }
7905
7906 /* Handle other relocations that tweak non-addend part of insn. */
7907 branch_bit = 0;
7908 switch (r_type)
7909 {
7910 default:
7911 break;
7912
7913 /* Branch taken prediction relocations. */
7914 case R_PPC_ADDR14_BRTAKEN:
7915 case R_PPC_REL14_BRTAKEN:
7916 branch_bit = BRANCH_PREDICT_BIT;
7917 /* Fall thru */
7918
7919 /* Branch not taken prediction relocations. */
7920 case R_PPC_ADDR14_BRNTAKEN:
7921 case R_PPC_REL14_BRNTAKEN:
7922 {
7923 bfd_vma insn;
7924
7925 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7926 insn &= ~BRANCH_PREDICT_BIT;
7927 insn |= branch_bit;
7928
7929 from = (rel->r_offset
7930 + input_section->output_offset
7931 + input_section->output_section->vma);
7932
7933 /* Invert 'y' bit if not the default. */
7934 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7935 insn ^= BRANCH_PREDICT_BIT;
7936
7937 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7938 break;
7939 }
7940 }
7941
7942 ifunc = NULL;
7943 if (!htab->is_vxworks)
7944 {
7945 struct plt_entry *ent;
7946
7947 if (h != NULL)
7948 {
7949 if (h->type == STT_GNU_IFUNC)
7950 ifunc = &h->plt.plist;
7951 }
7952 else if (local_got_offsets != NULL
7953 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7954 {
7955 struct plt_entry **local_plt;
7956
7957 local_plt = (struct plt_entry **) (local_got_offsets
7958 + symtab_hdr->sh_info);
7959 ifunc = local_plt + r_symndx;
7960 }
7961
7962 ent = NULL;
7963 if (ifunc != NULL
7964 && (!info->shared
7965 || is_branch_reloc (r_type)))
7966 {
7967 addend = 0;
7968 if (r_type == R_PPC_PLTREL24 && info->shared)
7969 addend = rel->r_addend;
7970 ent = find_plt_ent (ifunc, got2, addend);
7971 }
7972 if (ent != NULL)
7973 {
7974 if (h == NULL && (ent->plt.offset & 1) == 0)
7975 {
7976 Elf_Internal_Rela rela;
7977 bfd_byte *loc;
7978
7979 rela.r_offset = (htab->iplt->output_section->vma
7980 + htab->iplt->output_offset
7981 + ent->plt.offset);
7982 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7983 rela.r_addend = relocation;
7984 loc = htab->reliplt->contents;
7985 loc += (htab->reliplt->reloc_count++
7986 * sizeof (Elf32_External_Rela));
7987 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7988
7989 ent->plt.offset |= 1;
7990 }
7991 if (h == NULL && (ent->glink_offset & 1) == 0)
7992 {
7993 unsigned char *p = ((unsigned char *) htab->glink->contents
7994 + ent->glink_offset);
7995 write_glink_stub (ent, htab->iplt, p, info);
7996 ent->glink_offset |= 1;
7997 }
7998
7999 unresolved_reloc = FALSE;
8000 if (htab->plt_type == PLT_NEW
8001 || !htab->elf.dynamic_sections_created
8002 || h == NULL
8003 || h->dynindx == -1)
8004 relocation = (htab->glink->output_section->vma
8005 + htab->glink->output_offset
8006 + (ent->glink_offset & ~1));
8007 else
8008 relocation = (htab->plt->output_section->vma
8009 + htab->plt->output_offset
8010 + ent->plt.offset);
8011 }
8012 }
8013
8014 addend = rel->r_addend;
8015 tls_type = 0;
8016 howto = NULL;
8017 if (r_type < R_PPC_max)
8018 howto = ppc_elf_howto_table[r_type];
8019 switch (r_type)
8020 {
8021 default:
8022 info->callbacks->einfo
8023 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8024 input_bfd, (int) r_type, sym_name);
8025
8026 bfd_set_error (bfd_error_bad_value);
8027 ret = FALSE;
8028 continue;
8029
8030 case R_PPC_NONE:
8031 case R_PPC_TLS:
8032 case R_PPC_TLSGD:
8033 case R_PPC_TLSLD:
8034 case R_PPC_EMB_MRKREF:
8035 case R_PPC_GNU_VTINHERIT:
8036 case R_PPC_GNU_VTENTRY:
8037 continue;
8038
8039 /* GOT16 relocations. Like an ADDR16 using the symbol's
8040 address in the GOT as relocation value instead of the
8041 symbol's value itself. Also, create a GOT entry for the
8042 symbol and put the symbol value there. */
8043 case R_PPC_GOT_TLSGD16:
8044 case R_PPC_GOT_TLSGD16_LO:
8045 case R_PPC_GOT_TLSGD16_HI:
8046 case R_PPC_GOT_TLSGD16_HA:
8047 tls_type = TLS_TLS | TLS_GD;
8048 goto dogot;
8049
8050 case R_PPC_GOT_TLSLD16:
8051 case R_PPC_GOT_TLSLD16_LO:
8052 case R_PPC_GOT_TLSLD16_HI:
8053 case R_PPC_GOT_TLSLD16_HA:
8054 tls_type = TLS_TLS | TLS_LD;
8055 goto dogot;
8056
8057 case R_PPC_GOT_TPREL16:
8058 case R_PPC_GOT_TPREL16_LO:
8059 case R_PPC_GOT_TPREL16_HI:
8060 case R_PPC_GOT_TPREL16_HA:
8061 tls_type = TLS_TLS | TLS_TPREL;
8062 goto dogot;
8063
8064 case R_PPC_GOT_DTPREL16:
8065 case R_PPC_GOT_DTPREL16_LO:
8066 case R_PPC_GOT_DTPREL16_HI:
8067 case R_PPC_GOT_DTPREL16_HA:
8068 tls_type = TLS_TLS | TLS_DTPREL;
8069 goto dogot;
8070
8071 case R_PPC_GOT16:
8072 case R_PPC_GOT16_LO:
8073 case R_PPC_GOT16_HI:
8074 case R_PPC_GOT16_HA:
8075 tls_mask = 0;
8076 dogot:
8077 {
8078 /* Relocation is to the entry for this symbol in the global
8079 offset table. */
8080 bfd_vma off;
8081 bfd_vma *offp;
8082 unsigned long indx;
8083
8084 if (htab->got == NULL)
8085 abort ();
8086
8087 indx = 0;
8088 if (tls_type == (TLS_TLS | TLS_LD)
8089 && (h == NULL
8090 || !h->def_dynamic))
8091 offp = &htab->tlsld_got.offset;
8092 else if (h != NULL)
8093 {
8094 bfd_boolean dyn;
8095 dyn = htab->elf.dynamic_sections_created;
8096 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8097 || (info->shared
8098 && SYMBOL_REFERENCES_LOCAL (info, h)))
8099 /* This is actually a static link, or it is a
8100 -Bsymbolic link and the symbol is defined
8101 locally, or the symbol was forced to be local
8102 because of a version file. */
8103 ;
8104 else
8105 {
8106 BFD_ASSERT (h->dynindx != -1);
8107 indx = h->dynindx;
8108 unresolved_reloc = FALSE;
8109 }
8110 offp = &h->got.offset;
8111 }
8112 else
8113 {
8114 if (local_got_offsets == NULL)
8115 abort ();
8116 offp = &local_got_offsets[r_symndx];
8117 }
8118
8119 /* The offset must always be a multiple of 4. We use the
8120 least significant bit to record whether we have already
8121 processed this entry. */
8122 off = *offp;
8123 if ((off & 1) != 0)
8124 off &= ~1;
8125 else
8126 {
8127 unsigned int tls_m = (tls_mask
8128 & (TLS_LD | TLS_GD | TLS_DTPREL
8129 | TLS_TPREL | TLS_TPRELGD));
8130
8131 if (offp == &htab->tlsld_got.offset)
8132 tls_m = TLS_LD;
8133 else if (h == NULL
8134 || !h->def_dynamic)
8135 tls_m &= ~TLS_LD;
8136
8137 /* We might have multiple got entries for this sym.
8138 Initialize them all. */
8139 do
8140 {
8141 int tls_ty = 0;
8142
8143 if ((tls_m & TLS_LD) != 0)
8144 {
8145 tls_ty = TLS_TLS | TLS_LD;
8146 tls_m &= ~TLS_LD;
8147 }
8148 else if ((tls_m & TLS_GD) != 0)
8149 {
8150 tls_ty = TLS_TLS | TLS_GD;
8151 tls_m &= ~TLS_GD;
8152 }
8153 else if ((tls_m & TLS_DTPREL) != 0)
8154 {
8155 tls_ty = TLS_TLS | TLS_DTPREL;
8156 tls_m &= ~TLS_DTPREL;
8157 }
8158 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8159 {
8160 tls_ty = TLS_TLS | TLS_TPREL;
8161 tls_m = 0;
8162 }
8163
8164 /* Generate relocs for the dynamic linker. */
8165 if ((info->shared || indx != 0)
8166 && (offp == &htab->tlsld_got.offset
8167 || h == NULL
8168 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8169 || h->root.type != bfd_link_hash_undefweak))
8170 {
8171 asection *rsec = htab->relgot;
8172 bfd_byte * loc;
8173
8174 if (ifunc != NULL)
8175 rsec = htab->reliplt;
8176 outrel.r_offset = (htab->got->output_section->vma
8177 + htab->got->output_offset
8178 + off);
8179 outrel.r_addend = 0;
8180 if (tls_ty & (TLS_LD | TLS_GD))
8181 {
8182 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8183 if (tls_ty == (TLS_TLS | TLS_GD))
8184 {
8185 loc = rsec->contents;
8186 loc += (rsec->reloc_count++
8187 * sizeof (Elf32_External_Rela));
8188 bfd_elf32_swap_reloca_out (output_bfd,
8189 &outrel, loc);
8190 outrel.r_offset += 4;
8191 outrel.r_info
8192 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8193 }
8194 }
8195 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8196 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8197 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8198 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8199 else if (indx != 0)
8200 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8201 else if (ifunc != NULL)
8202 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8203 else
8204 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8205 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8206 {
8207 outrel.r_addend += relocation;
8208 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8209 outrel.r_addend -= htab->elf.tls_sec->vma;
8210 }
8211 loc = rsec->contents;
8212 loc += (rsec->reloc_count++
8213 * sizeof (Elf32_External_Rela));
8214 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8215 }
8216
8217 /* Init the .got section contents if we're not
8218 emitting a reloc. */
8219 else
8220 {
8221 bfd_vma value = relocation;
8222
8223 if (tls_ty == (TLS_TLS | TLS_LD))
8224 value = 1;
8225 else if (tls_ty != 0)
8226 {
8227 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8228 if (tls_ty == (TLS_TLS | TLS_TPREL))
8229 value += DTP_OFFSET - TP_OFFSET;
8230
8231 if (tls_ty == (TLS_TLS | TLS_GD))
8232 {
8233 bfd_put_32 (output_bfd, value,
8234 htab->got->contents + off + 4);
8235 value = 1;
8236 }
8237 }
8238 bfd_put_32 (output_bfd, value,
8239 htab->got->contents + off);
8240 }
8241
8242 off += 4;
8243 if (tls_ty & (TLS_LD | TLS_GD))
8244 off += 4;
8245 }
8246 while (tls_m != 0);
8247
8248 off = *offp;
8249 *offp = off | 1;
8250 }
8251
8252 if (off >= (bfd_vma) -2)
8253 abort ();
8254
8255 if ((tls_type & TLS_TLS) != 0)
8256 {
8257 if (tls_type != (TLS_TLS | TLS_LD))
8258 {
8259 if ((tls_mask & TLS_LD) != 0
8260 && !(h == NULL
8261 || !h->def_dynamic))
8262 off += 8;
8263 if (tls_type != (TLS_TLS | TLS_GD))
8264 {
8265 if ((tls_mask & TLS_GD) != 0)
8266 off += 8;
8267 if (tls_type != (TLS_TLS | TLS_DTPREL))
8268 {
8269 if ((tls_mask & TLS_DTPREL) != 0)
8270 off += 4;
8271 }
8272 }
8273 }
8274 }
8275
8276 relocation = (htab->got->output_section->vma
8277 + htab->got->output_offset
8278 + off
8279 - SYM_VAL (htab->elf.hgot));
8280
8281 /* Addends on got relocations don't make much sense.
8282 x+off@got is actually x@got+off, and since the got is
8283 generated by a hash table traversal, the value in the
8284 got at entry m+n bears little relation to the entry m. */
8285 if (addend != 0)
8286 info->callbacks->einfo
8287 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8288 input_bfd, input_section, rel->r_offset,
8289 howto->name,
8290 sym_name);
8291 }
8292 break;
8293
8294 /* Relocations that need no special processing. */
8295 case R_PPC_LOCAL24PC:
8296 /* It makes no sense to point a local relocation
8297 at a symbol not in this object. */
8298 if (unresolved_reloc)
8299 {
8300 if (! (*info->callbacks->undefined_symbol) (info,
8301 h->root.root.string,
8302 input_bfd,
8303 input_section,
8304 rel->r_offset,
8305 TRUE))
8306 return FALSE;
8307 continue;
8308 }
8309 break;
8310
8311 case R_PPC_DTPREL16:
8312 case R_PPC_DTPREL16_LO:
8313 case R_PPC_DTPREL16_HI:
8314 case R_PPC_DTPREL16_HA:
8315 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8316 break;
8317
8318 /* Relocations that may need to be propagated if this is a shared
8319 object. */
8320 case R_PPC_TPREL16:
8321 case R_PPC_TPREL16_LO:
8322 case R_PPC_TPREL16_HI:
8323 case R_PPC_TPREL16_HA:
8324 if (h != NULL
8325 && h->root.type == bfd_link_hash_undefweak
8326 && h->dynindx == -1)
8327 {
8328 /* Make this relocation against an undefined weak symbol
8329 resolve to zero. This is really just a tweak, since
8330 code using weak externs ought to check that they are
8331 defined before using them. */
8332 bfd_byte *p = contents + rel->r_offset - d_offset;
8333 unsigned int insn = bfd_get_32 (output_bfd, p);
8334 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8335 if (insn != 0)
8336 bfd_put_32 (output_bfd, insn, p);
8337 break;
8338 }
8339 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8340 /* The TPREL16 relocs shouldn't really be used in shared
8341 libs as they will result in DT_TEXTREL being set, but
8342 support them anyway. */
8343 goto dodyn;
8344
8345 case R_PPC_TPREL32:
8346 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8347 goto dodyn;
8348
8349 case R_PPC_DTPREL32:
8350 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8351 goto dodyn;
8352
8353 case R_PPC_DTPMOD32:
8354 relocation = 1;
8355 addend = 0;
8356 goto dodyn;
8357
8358 case R_PPC_REL16:
8359 case R_PPC_REL16_LO:
8360 case R_PPC_REL16_HI:
8361 case R_PPC_REL16_HA:
8362 break;
8363
8364 case R_PPC_REL32:
8365 if (h == NULL || h == htab->elf.hgot)
8366 break;
8367 /* fall through */
8368
8369 case R_PPC_ADDR32:
8370 case R_PPC_ADDR16:
8371 case R_PPC_ADDR16_LO:
8372 case R_PPC_ADDR16_HI:
8373 case R_PPC_ADDR16_HA:
8374 case R_PPC_UADDR32:
8375 case R_PPC_UADDR16:
8376 goto dodyn;
8377
8378 case R_PPC_VLE_REL8:
8379 case R_PPC_VLE_REL15:
8380 case R_PPC_VLE_REL24:
8381 case R_PPC_REL24:
8382 case R_PPC_REL14:
8383 case R_PPC_REL14_BRTAKEN:
8384 case R_PPC_REL14_BRNTAKEN:
8385 /* If these relocations are not to a named symbol, they can be
8386 handled right here, no need to bother the dynamic linker. */
8387 if (SYMBOL_CALLS_LOCAL (info, h)
8388 || h == htab->elf.hgot)
8389 break;
8390 /* fall through */
8391
8392 case R_PPC_ADDR24:
8393 case R_PPC_ADDR14:
8394 case R_PPC_ADDR14_BRTAKEN:
8395 case R_PPC_ADDR14_BRNTAKEN:
8396 if (h != NULL && !info->shared)
8397 break;
8398 /* fall through */
8399
8400 dodyn:
8401 if ((input_section->flags & SEC_ALLOC) == 0
8402 || is_vxworks_tls)
8403 break;
8404
8405 if ((info->shared
8406 && !(h != NULL
8407 && ((h->root.type == bfd_link_hash_undefined
8408 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8409 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8410 || (h->root.type == bfd_link_hash_undefweak
8411 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8412 && (must_be_dyn_reloc (info, r_type)
8413 || !SYMBOL_CALLS_LOCAL (info, h)))
8414 || (ELIMINATE_COPY_RELOCS
8415 && !info->shared
8416 && h != NULL
8417 && h->dynindx != -1
8418 && !h->non_got_ref
8419 && !h->def_regular))
8420 {
8421 int skip;
8422 bfd_byte *loc;
8423 asection *sreloc;
8424 #ifdef DEBUG
8425 fprintf (stderr, "ppc_elf_relocate_section needs to "
8426 "create relocation for %s\n",
8427 (h && h->root.root.string
8428 ? h->root.root.string : "<unknown>"));
8429 #endif
8430
8431 /* When generating a shared object, these relocations
8432 are copied into the output file to be resolved at run
8433 time. */
8434 sreloc = elf_section_data (input_section)->sreloc;
8435 if (ifunc)
8436 sreloc = htab->reliplt;
8437 if (sreloc == NULL)
8438 return FALSE;
8439
8440 skip = 0;
8441 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8442 input_section,
8443 rel->r_offset);
8444 if (outrel.r_offset == (bfd_vma) -1
8445 || outrel.r_offset == (bfd_vma) -2)
8446 skip = (int) outrel.r_offset;
8447 outrel.r_offset += (input_section->output_section->vma
8448 + input_section->output_offset);
8449
8450 if (skip)
8451 memset (&outrel, 0, sizeof outrel);
8452 else if ((h != NULL
8453 && (h->root.type == bfd_link_hash_undefined
8454 || h->root.type == bfd_link_hash_undefweak))
8455 || !SYMBOL_REFERENCES_LOCAL (info, h))
8456 {
8457 BFD_ASSERT (h->dynindx != -1);
8458 unresolved_reloc = FALSE;
8459 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8460 outrel.r_addend = rel->r_addend;
8461 }
8462 else
8463 {
8464 outrel.r_addend = relocation + rel->r_addend;
8465
8466 if (r_type != R_PPC_ADDR32)
8467 {
8468 long indx = 0;
8469
8470 if (ifunc != NULL)
8471 {
8472 /* If we get here when building a static
8473 executable, then the libc startup function
8474 responsible for applying indirect function
8475 relocations is going to complain about
8476 the reloc type.
8477 If we get here when building a dynamic
8478 executable, it will be because we have
8479 a text relocation. The dynamic loader
8480 will set the text segment writable and
8481 non-executable to apply text relocations.
8482 So we'll segfault when trying to run the
8483 indirection function to resolve the reloc. */
8484 info->callbacks->einfo
8485 (_("%P: %H: relocation %s for indirect "
8486 "function %s unsupported\n"),
8487 input_bfd, input_section, rel->r_offset,
8488 howto->name,
8489 sym_name);
8490 ret = FALSE;
8491 }
8492 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8493 ;
8494 else if (sec == NULL || sec->owner == NULL)
8495 {
8496 bfd_set_error (bfd_error_bad_value);
8497 ret = FALSE;
8498 }
8499 else
8500 {
8501 asection *osec;
8502
8503 /* We are turning this relocation into one
8504 against a section symbol. It would be
8505 proper to subtract the symbol's value,
8506 osec->vma, from the emitted reloc addend,
8507 but ld.so expects buggy relocs.
8508 FIXME: Why not always use a zero index? */
8509 osec = sec->output_section;
8510 indx = elf_section_data (osec)->dynindx;
8511 if (indx == 0)
8512 {
8513 osec = htab->elf.text_index_section;
8514 indx = elf_section_data (osec)->dynindx;
8515 }
8516 BFD_ASSERT (indx != 0);
8517 #ifdef DEBUG
8518 if (indx == 0)
8519 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8520 indx, osec->name, osec->flags,
8521 h->root.root.string);
8522 #endif
8523 }
8524
8525 outrel.r_info = ELF32_R_INFO (indx, r_type);
8526 }
8527 else if (ifunc != NULL)
8528 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8529 else
8530 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8531 }
8532
8533 loc = sreloc->contents;
8534 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8535 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8536
8537 if (skip == -1)
8538 continue;
8539
8540 /* This reloc will be computed at runtime. We clear the memory
8541 so that it contains predictable value. */
8542 if (! skip
8543 && ((input_section->flags & SEC_ALLOC) != 0
8544 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8545 {
8546 relocation = howto->pc_relative ? outrel.r_offset : 0;
8547 addend = 0;
8548 break;
8549 }
8550 }
8551 break;
8552
8553 case R_PPC_RELAX_PLT:
8554 case R_PPC_RELAX_PLTREL24:
8555 if (h != NULL)
8556 {
8557 struct plt_entry *ent;
8558 bfd_vma got2_addend = 0;
8559
8560 if (r_type == R_PPC_RELAX_PLTREL24)
8561 {
8562 if (info->shared)
8563 got2_addend = addend;
8564 addend = 0;
8565 }
8566 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8567 if (htab->plt_type == PLT_NEW)
8568 relocation = (htab->glink->output_section->vma
8569 + htab->glink->output_offset
8570 + ent->glink_offset);
8571 else
8572 relocation = (htab->plt->output_section->vma
8573 + htab->plt->output_offset
8574 + ent->plt.offset);
8575 }
8576 /* Fall thru */
8577
8578 case R_PPC_RELAX:
8579 {
8580 const int *stub;
8581 size_t size;
8582 size_t insn_offset = rel->r_offset;
8583 unsigned int insn;
8584
8585 if (info->shared)
8586 {
8587 relocation -= (input_section->output_section->vma
8588 + input_section->output_offset
8589 + rel->r_offset - 4);
8590 stub = shared_stub_entry;
8591 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8592 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8593 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8594 stub += 3;
8595 size = ARRAY_SIZE (shared_stub_entry) - 3;
8596 }
8597 else
8598 {
8599 stub = stub_entry;
8600 size = ARRAY_SIZE (stub_entry);
8601 }
8602
8603 relocation += addend;
8604 if (info->relocatable)
8605 relocation = 0;
8606
8607 /* First insn is HA, second is LO. */
8608 insn = *stub++;
8609 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8610 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8611 insn_offset += 4;
8612
8613 insn = *stub++;
8614 insn |= relocation & 0xffff;
8615 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8616 insn_offset += 4;
8617 size -= 2;
8618
8619 while (size != 0)
8620 {
8621 insn = *stub++;
8622 --size;
8623 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8624 insn_offset += 4;
8625 }
8626
8627 /* Rewrite the reloc and convert one of the trailing nop
8628 relocs to describe this relocation. */
8629 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8630 /* The relocs are at the bottom 2 bytes */
8631 rel[0].r_offset += d_offset;
8632 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8633 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8634 rel[1].r_offset += 4;
8635 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8636 rel++;
8637 }
8638 continue;
8639
8640 /* Indirect .sdata relocation. */
8641 case R_PPC_EMB_SDAI16:
8642 BFD_ASSERT (htab->sdata[0].section != NULL);
8643 if (!is_static_defined (htab->sdata[0].sym))
8644 {
8645 unresolved_reloc = TRUE;
8646 break;
8647 }
8648 relocation
8649 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8650 h, relocation, rel);
8651 addend = 0;
8652 break;
8653
8654 /* Indirect .sdata2 relocation. */
8655 case R_PPC_EMB_SDA2I16:
8656 BFD_ASSERT (htab->sdata[1].section != NULL);
8657 if (!is_static_defined (htab->sdata[1].sym))
8658 {
8659 unresolved_reloc = TRUE;
8660 break;
8661 }
8662 relocation
8663 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8664 h, relocation, rel);
8665 addend = 0;
8666 break;
8667
8668 /* Handle the TOC16 reloc. We want to use the offset within the .got
8669 section, not the actual VMA. This is appropriate when generating
8670 an embedded ELF object, for which the .got section acts like the
8671 AIX .toc section. */
8672 case R_PPC_TOC16: /* phony GOT16 relocations */
8673 if (sec == NULL || sec->output_section == NULL)
8674 {
8675 unresolved_reloc = TRUE;
8676 break;
8677 }
8678 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8679 ".got") == 0
8680 || strcmp (bfd_get_section_name (sec->owner, sec),
8681 ".cgot") == 0);
8682
8683 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8684 break;
8685
8686 case R_PPC_PLTREL24:
8687 if (h != NULL && ifunc == NULL)
8688 {
8689 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8690 info->shared ? addend : 0);
8691 if (ent == NULL
8692 || htab->plt == NULL)
8693 {
8694 /* We didn't make a PLT entry for this symbol. This
8695 happens when statically linking PIC code, or when
8696 using -Bsymbolic. */
8697 }
8698 else
8699 {
8700 /* Relocation is to the entry for this symbol in the
8701 procedure linkage table. */
8702 unresolved_reloc = FALSE;
8703 if (htab->plt_type == PLT_NEW)
8704 relocation = (htab->glink->output_section->vma
8705 + htab->glink->output_offset
8706 + ent->glink_offset);
8707 else
8708 relocation = (htab->plt->output_section->vma
8709 + htab->plt->output_offset
8710 + ent->plt.offset);
8711 }
8712 }
8713
8714 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8715 addend specifies the GOT pointer offset within .got2.
8716 Don't apply it to the relocation field. */
8717 addend = 0;
8718 break;
8719
8720 /* Relocate against _SDA_BASE_. */
8721 case R_PPC_SDAREL16:
8722 {
8723 const char *name;
8724 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8725
8726 if (sec == NULL
8727 || sec->output_section == NULL
8728 || !is_static_defined (sda))
8729 {
8730 unresolved_reloc = TRUE;
8731 break;
8732 }
8733 addend -= SYM_VAL (sda);
8734
8735 name = bfd_get_section_name (output_bfd, sec->output_section);
8736 if (!(strcmp (name, ".sdata") == 0
8737 || strcmp (name, ".sbss") == 0))
8738 {
8739 info->callbacks->einfo
8740 (_("%P: %B: the target (%s) of a %s relocation is "
8741 "in the wrong output section (%s)\n"),
8742 input_bfd,
8743 sym_name,
8744 howto->name,
8745 name);
8746 }
8747 }
8748 break;
8749
8750 /* Relocate against _SDA2_BASE_. */
8751 case R_PPC_EMB_SDA2REL:
8752 {
8753 const char *name;
8754 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8755
8756 if (sec == NULL
8757 || sec->output_section == NULL
8758 || !is_static_defined (sda))
8759 {
8760 unresolved_reloc = TRUE;
8761 break;
8762 }
8763 addend -= SYM_VAL (sda);
8764
8765 name = bfd_get_section_name (output_bfd, sec->output_section);
8766 if (!(strcmp (name, ".sdata2") == 0
8767 || strcmp (name, ".sbss2") == 0))
8768 {
8769 info->callbacks->einfo
8770 (_("%P: %B: the target (%s) of a %s relocation is "
8771 "in the wrong output section (%s)\n"),
8772 input_bfd,
8773 sym_name,
8774 howto->name,
8775 name);
8776 }
8777 }
8778 break;
8779
8780 case R_PPC_VLE_LO16A:
8781 relocation = relocation + addend;
8782 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8783 relocation, split16a_type);
8784 continue;
8785
8786 case R_PPC_VLE_LO16D:
8787 relocation = relocation + addend;
8788 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8789 relocation, split16d_type);
8790 continue;
8791
8792 case R_PPC_VLE_HI16A:
8793 relocation = (relocation + addend) >> 16;
8794 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8795 relocation, split16a_type);
8796 continue;
8797
8798 case R_PPC_VLE_HI16D:
8799 relocation = (relocation + addend) >> 16;
8800 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8801 relocation, split16d_type);
8802 continue;
8803
8804 case R_PPC_VLE_HA16A:
8805 relocation = (relocation + addend + 0x8000) >> 16;
8806 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8807 relocation, split16a_type);
8808 continue;
8809
8810 case R_PPC_VLE_HA16D:
8811 relocation = (relocation + addend + 0x8000) >> 16;
8812 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8813 relocation, split16d_type);
8814 continue;
8815
8816 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8817 case R_PPC_EMB_SDA21:
8818 case R_PPC_VLE_SDA21:
8819 case R_PPC_EMB_RELSDA:
8820 case R_PPC_VLE_SDA21_LO:
8821 {
8822 const char *name;
8823 int reg;
8824 unsigned int insn;
8825 struct elf_link_hash_entry *sda = NULL;
8826
8827 if (sec == NULL || sec->output_section == NULL)
8828 {
8829 unresolved_reloc = TRUE;
8830 break;
8831 }
8832
8833 name = bfd_get_section_name (output_bfd, sec->output_section);
8834 if (strcmp (name, ".sdata") == 0
8835 || strcmp (name, ".sbss") == 0)
8836 {
8837 reg = 13;
8838 sda = htab->sdata[0].sym;
8839 }
8840 else if (strcmp (name, ".sdata2") == 0
8841 || strcmp (name, ".sbss2") == 0)
8842 {
8843 reg = 2;
8844 sda = htab->sdata[1].sym;
8845 }
8846 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8847 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8848 {
8849 reg = 0;
8850 }
8851 else
8852 {
8853 info->callbacks->einfo
8854 (_("%P: %B: the target (%s) of a %s relocation is "
8855 "in the wrong output section (%s)\n"),
8856 input_bfd,
8857 sym_name,
8858 howto->name,
8859 name);
8860
8861 bfd_set_error (bfd_error_bad_value);
8862 ret = FALSE;
8863 continue;
8864 }
8865
8866 if (sda != NULL)
8867 {
8868 if (!is_static_defined (sda))
8869 {
8870 unresolved_reloc = TRUE;
8871 break;
8872 }
8873 addend -= SYM_VAL (sda);
8874 }
8875
8876 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8877 if (reg == 0
8878 && (r_type == R_PPC_VLE_SDA21
8879 || r_type == R_PPC_VLE_SDA21_LO))
8880 {
8881 relocation = relocation + addend;
8882 addend = 0;
8883
8884 /* Force e_li insn, keeping RT from original insn. */
8885 insn &= 0x1f << 21;
8886 insn |= 28u << 26;
8887
8888 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8889 /* Top 4 bits of value to 17..20. */
8890 insn |= (relocation & 0xf0000) >> 5;
8891 /* Next 5 bits of the value to 11..15. */
8892 insn |= (relocation & 0xf800) << 5;
8893 /* And the final 11 bits of the value to bits 21 to 31. */
8894 insn |= relocation & 0x7ff;
8895
8896 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8897
8898 if (r_type == R_PPC_VLE_SDA21
8899 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8900 goto overflow;
8901 continue;
8902 }
8903 else if (r_type == R_PPC_EMB_SDA21
8904 || r_type == R_PPC_VLE_SDA21
8905 || r_type == R_PPC_VLE_SDA21_LO)
8906 {
8907 /* Fill in register field. */
8908 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8909 }
8910 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8911 }
8912 break;
8913
8914 case R_PPC_VLE_SDAREL_LO16A:
8915 case R_PPC_VLE_SDAREL_LO16D:
8916 case R_PPC_VLE_SDAREL_HI16A:
8917 case R_PPC_VLE_SDAREL_HI16D:
8918 case R_PPC_VLE_SDAREL_HA16A:
8919 case R_PPC_VLE_SDAREL_HA16D:
8920 {
8921 bfd_vma value;
8922 const char *name;
8923 //int reg;
8924 struct elf_link_hash_entry *sda = NULL;
8925
8926 if (sec == NULL || sec->output_section == NULL)
8927 {
8928 unresolved_reloc = TRUE;
8929 break;
8930 }
8931
8932 name = bfd_get_section_name (output_bfd, sec->output_section);
8933 if (strcmp (name, ".sdata") == 0
8934 || strcmp (name, ".sbss") == 0)
8935 {
8936 //reg = 13;
8937 sda = htab->sdata[0].sym;
8938 }
8939 else if (strcmp (name, ".sdata2") == 0
8940 || strcmp (name, ".sbss2") == 0)
8941 {
8942 //reg = 2;
8943 sda = htab->sdata[1].sym;
8944 }
8945 else
8946 {
8947 (*_bfd_error_handler)
8948 (_("%B: the target (%s) of a %s relocation is "
8949 "in the wrong output section (%s)"),
8950 input_bfd,
8951 sym_name,
8952 howto->name,
8953 name);
8954
8955 bfd_set_error (bfd_error_bad_value);
8956 ret = FALSE;
8957 continue;
8958 }
8959
8960 if (sda != NULL)
8961 {
8962 if (!is_static_defined (sda))
8963 {
8964 unresolved_reloc = TRUE;
8965 break;
8966 }
8967 }
8968
8969 value = (sda->root.u.def.section->output_section->vma
8970 + sda->root.u.def.section->output_offset
8971 + addend);
8972
8973 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8974 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8975 value, split16a_type);
8976 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8977 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8978 value, split16d_type);
8979 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8980 {
8981 value = value >> 16;
8982 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8983 value, split16a_type);
8984 }
8985 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8986 {
8987 value = value >> 16;
8988 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8989 value, split16d_type);
8990 }
8991 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8992 {
8993 value = (value + 0x8000) >> 16;
8994 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8995 value, split16a_type);
8996 }
8997 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8998 {
8999 value = (value + 0x8000) >> 16;
9000 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9001 value, split16d_type);
9002 }
9003 }
9004 continue;
9005
9006 /* Relocate against the beginning of the section. */
9007 case R_PPC_SECTOFF:
9008 case R_PPC_SECTOFF_LO:
9009 case R_PPC_SECTOFF_HI:
9010 case R_PPC_SECTOFF_HA:
9011 if (sec == NULL || sec->output_section == NULL)
9012 {
9013 unresolved_reloc = TRUE;
9014 break;
9015 }
9016 addend -= sec->output_section->vma;
9017 break;
9018
9019 /* Negative relocations. */
9020 case R_PPC_EMB_NADDR32:
9021 case R_PPC_EMB_NADDR16:
9022 case R_PPC_EMB_NADDR16_LO:
9023 case R_PPC_EMB_NADDR16_HI:
9024 case R_PPC_EMB_NADDR16_HA:
9025 addend -= 2 * relocation;
9026 break;
9027
9028 case R_PPC_COPY:
9029 case R_PPC_GLOB_DAT:
9030 case R_PPC_JMP_SLOT:
9031 case R_PPC_RELATIVE:
9032 case R_PPC_IRELATIVE:
9033 case R_PPC_PLT32:
9034 case R_PPC_PLTREL32:
9035 case R_PPC_PLT16_LO:
9036 case R_PPC_PLT16_HI:
9037 case R_PPC_PLT16_HA:
9038 case R_PPC_ADDR30:
9039 case R_PPC_EMB_RELSEC16:
9040 case R_PPC_EMB_RELST_LO:
9041 case R_PPC_EMB_RELST_HI:
9042 case R_PPC_EMB_RELST_HA:
9043 case R_PPC_EMB_BIT_FLD:
9044 info->callbacks->einfo
9045 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9046 input_bfd,
9047 howto->name,
9048 sym_name);
9049
9050 bfd_set_error (bfd_error_invalid_operation);
9051 ret = FALSE;
9052 continue;
9053 }
9054
9055 /* Do any further special processing. */
9056 switch (r_type)
9057 {
9058 default:
9059 break;
9060
9061 case R_PPC_ADDR16_HA:
9062 case R_PPC_REL16_HA:
9063 case R_PPC_SECTOFF_HA:
9064 case R_PPC_TPREL16_HA:
9065 case R_PPC_DTPREL16_HA:
9066 case R_PPC_EMB_NADDR16_HA:
9067 case R_PPC_EMB_RELST_HA:
9068 /* It's just possible that this symbol is a weak symbol
9069 that's not actually defined anywhere. In that case,
9070 'sec' would be NULL, and we should leave the symbol
9071 alone (it will be set to zero elsewhere in the link). */
9072 if (sec == NULL)
9073 break;
9074 /* Fall thru */
9075
9076 case R_PPC_PLT16_HA:
9077 case R_PPC_GOT16_HA:
9078 case R_PPC_GOT_TLSGD16_HA:
9079 case R_PPC_GOT_TLSLD16_HA:
9080 case R_PPC_GOT_TPREL16_HA:
9081 case R_PPC_GOT_DTPREL16_HA:
9082 /* Add 0x10000 if sign bit in 0:15 is set.
9083 Bits 0:15 are not used. */
9084 addend += 0x8000;
9085 break;
9086
9087 case R_PPC_ADDR16:
9088 case R_PPC_ADDR16_LO:
9089 case R_PPC_GOT16:
9090 case R_PPC_GOT16_LO:
9091 case R_PPC_SDAREL16:
9092 case R_PPC_SECTOFF:
9093 case R_PPC_SECTOFF_LO:
9094 case R_PPC_DTPREL16:
9095 case R_PPC_DTPREL16_LO:
9096 case R_PPC_TPREL16:
9097 case R_PPC_TPREL16_LO:
9098 case R_PPC_GOT_TLSGD16:
9099 case R_PPC_GOT_TLSGD16_LO:
9100 case R_PPC_GOT_TLSLD16:
9101 case R_PPC_GOT_TLSLD16_LO:
9102 case R_PPC_GOT_DTPREL16:
9103 case R_PPC_GOT_DTPREL16_LO:
9104 case R_PPC_GOT_TPREL16:
9105 case R_PPC_GOT_TPREL16_LO:
9106 {
9107 /* The 32-bit ABI lacks proper relocations to deal with
9108 certain 64-bit instructions. Prevent damage to bits
9109 that make up part of the insn opcode. */
9110 unsigned int insn, mask, lobit;
9111
9112 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9113 mask = 0;
9114 if (is_insn_ds_form (insn))
9115 mask = 3;
9116 else if (is_insn_dq_form (insn))
9117 mask = 15;
9118 else
9119 break;
9120 lobit = mask & (relocation + addend);
9121 if (lobit != 0)
9122 {
9123 addend -= lobit;
9124 info->callbacks->einfo
9125 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9126 input_bfd, input_section, rel->r_offset,
9127 howto->name, sym_name, mask + 1);
9128 bfd_set_error (bfd_error_bad_value);
9129 ret = FALSE;
9130 }
9131 addend += insn & mask;
9132 }
9133 break;
9134 }
9135
9136 #ifdef DEBUG
9137 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9138 "offset = %ld, addend = %ld\n",
9139 howto->name,
9140 (int) r_type,
9141 sym_name,
9142 r_symndx,
9143 (long) rel->r_offset,
9144 (long) addend);
9145 #endif
9146
9147 if (unresolved_reloc
9148 && !((input_section->flags & SEC_DEBUGGING) != 0
9149 && h->def_dynamic)
9150 && _bfd_elf_section_offset (output_bfd, info, input_section,
9151 rel->r_offset) != (bfd_vma) -1)
9152 {
9153 info->callbacks->einfo
9154 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9155 input_bfd, input_section, rel->r_offset,
9156 howto->name,
9157 sym_name);
9158 ret = FALSE;
9159 }
9160
9161 /* 16-bit fields in insns mostly have signed values, but a
9162 few insns have 16-bit unsigned values. Really, we should
9163 have different reloc types. */
9164 if (howto->complain_on_overflow != complain_overflow_dont
9165 && howto->dst_mask == 0xffff
9166 && (input_section->flags & SEC_CODE) != 0)
9167 {
9168 enum complain_overflow complain = complain_overflow_signed;
9169
9170 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9171 {
9172 unsigned int insn;
9173
9174 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9175 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9176 complain = complain_overflow_bitfield;
9177 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9178 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9179 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9180 complain = complain_overflow_unsigned;
9181 }
9182 if (howto->complain_on_overflow != complain)
9183 {
9184 alt_howto = *howto;
9185 alt_howto.complain_on_overflow = complain;
9186 howto = &alt_howto;
9187 }
9188 }
9189
9190 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9191 rel->r_offset, relocation, addend);
9192
9193 if (r != bfd_reloc_ok)
9194 {
9195 if (r == bfd_reloc_overflow)
9196 {
9197 overflow:
9198 if (warned)
9199 continue;
9200 if (h != NULL
9201 && h->root.type == bfd_link_hash_undefweak
9202 && howto->pc_relative)
9203 {
9204 /* Assume this is a call protected by other code that
9205 detect the symbol is undefined. If this is the case,
9206 we can safely ignore the overflow. If not, the
9207 program is hosed anyway, and a little warning isn't
9208 going to help. */
9209
9210 continue;
9211 }
9212
9213 if (! (*info->callbacks->reloc_overflow) (info,
9214 (h ? &h->root : NULL),
9215 sym_name,
9216 howto->name,
9217 rel->r_addend,
9218 input_bfd,
9219 input_section,
9220 rel->r_offset))
9221 return FALSE;
9222 }
9223 else
9224 {
9225 info->callbacks->einfo
9226 (_("%P: %H: %s reloc against `%s': error %d\n"),
9227 input_bfd, input_section, rel->r_offset,
9228 howto->name, sym_name, (int) r);
9229 ret = FALSE;
9230 }
9231 }
9232 }
9233
9234 #ifdef DEBUG
9235 fprintf (stderr, "\n");
9236 #endif
9237
9238 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9239 && input_section->size != input_section->rawsize
9240 && (strcmp (input_section->output_section->name, ".init") == 0
9241 || strcmp (input_section->output_section->name, ".fini") == 0))
9242 {
9243 /* Branch around the trampolines. */
9244 unsigned int insn = B + input_section->size - input_section->rawsize;
9245 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9246 }
9247
9248 if (htab->params->ppc476_workaround
9249 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9250 && (!info->relocatable
9251 || (input_section->output_section->alignment_power
9252 >= htab->params->pagesize_p2)))
9253 {
9254 struct ppc_elf_relax_info *relax_info;
9255 bfd_vma start_addr, end_addr, addr;
9256 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9257
9258 relax_info = elf_section_data (input_section)->sec_info;
9259 if (relax_info->workaround_size != 0)
9260 {
9261 bfd_byte *p;
9262 unsigned int n;
9263 bfd_byte fill[4];
9264
9265 bfd_put_32 (input_bfd, BA, fill);
9266 p = contents + input_section->size - relax_info->workaround_size;
9267 n = relax_info->workaround_size >> 2;
9268 while (n--)
9269 {
9270 memcpy (p, fill, 4);
9271 p += 4;
9272 }
9273 }
9274
9275 /* The idea is: Replace the last instruction on a page with a
9276 branch to a patch area. Put the insn there followed by a
9277 branch back to the next page. Complicated a little by
9278 needing to handle moved conditional branches, and by not
9279 wanting to touch data-in-text. */
9280
9281 start_addr = (input_section->output_section->vma
9282 + input_section->output_offset);
9283 end_addr = (start_addr + input_section->size
9284 - relax_info->workaround_size);
9285 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9286 addr < end_addr;
9287 addr += pagesize)
9288 {
9289 bfd_vma offset = addr - start_addr;
9290 Elf_Internal_Rela *lo, *hi;
9291 bfd_boolean is_data;
9292 bfd_vma patch_off, patch_addr;
9293 unsigned int insn;
9294
9295 /* Do we have a data reloc at this offset? If so, leave
9296 the word alone. */
9297 is_data = FALSE;
9298 lo = relocs;
9299 hi = relend;
9300 rel = NULL;
9301 while (lo < hi)
9302 {
9303 rel = lo + (hi - lo) / 2;
9304 if (rel->r_offset < offset)
9305 lo = rel + 1;
9306 else if (rel->r_offset > offset + 3)
9307 hi = rel;
9308 else
9309 {
9310 switch (ELF32_R_TYPE (rel->r_info))
9311 {
9312 case R_PPC_ADDR32:
9313 case R_PPC_UADDR32:
9314 case R_PPC_REL32:
9315 case R_PPC_ADDR30:
9316 is_data = TRUE;
9317 break;
9318 default:
9319 break;
9320 }
9321 break;
9322 }
9323 }
9324 if (is_data)
9325 continue;
9326
9327 /* Some instructions can be left alone too. Unconditional
9328 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9329 avoid the icache failure.
9330
9331 The problem occurs due to prefetch across a page boundary
9332 where stale instructions can be fetched from the next
9333 page, and the mechanism for flushing these bad
9334 instructions fails under certain circumstances. The
9335 unconditional branches:
9336 1) Branch: b, bl, ba, bla,
9337 2) Branch Conditional: bc, bca, bcl, bcla,
9338 3) Branch Conditional to Link Register: bclr, bclrl,
9339 where (2) and (3) have BO=0x14 making them unconditional,
9340 prevent the bad prefetch because the prefetch itself is
9341 affected by these instructions. This happens even if the
9342 instruction is not executed.
9343
9344 A bctr example:
9345 .
9346 . lis 9,new_page@ha
9347 . addi 9,9,new_page@l
9348 . mtctr 9
9349 . bctr
9350 . nop
9351 . nop
9352 . new_page:
9353 .
9354 The bctr is not predicted taken due to ctr not being
9355 ready, so prefetch continues on past the bctr into the
9356 new page which might have stale instructions. If they
9357 fail to be flushed, then they will be executed after the
9358 bctr executes. Either of the following modifications
9359 prevent the bad prefetch from happening in the first
9360 place:
9361 .
9362 . lis 9,new_page@ha lis 9,new_page@ha
9363 . addi 9,9,new_page@l addi 9,9,new_page@l
9364 . mtctr 9 mtctr 9
9365 . bctr bctr
9366 . nop b somewhere_else
9367 . b somewhere_else nop
9368 . new_page: new_page:
9369 . */
9370 insn = bfd_get_32 (input_bfd, contents + offset);
9371 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9372 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9373 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9374 || ((insn & (0x3f << 26)) == (19u << 26)
9375 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9376 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9377 continue;
9378
9379 patch_addr = (start_addr + input_section->size
9380 - relax_info->workaround_size);
9381 patch_addr = (patch_addr + 15) & -16;
9382 patch_off = patch_addr - start_addr;
9383 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9384
9385 if (rel != NULL
9386 && rel->r_offset >= offset
9387 && rel->r_offset < offset + 4)
9388 {
9389 /* If the insn we are patching had a reloc, adjust the
9390 reloc r_offset so that the reloc applies to the moved
9391 location. This matters for -r and --emit-relocs. */
9392 if (rel + 1 != relend)
9393 {
9394 Elf_Internal_Rela tmp = *rel;
9395
9396 /* Keep the relocs sorted by r_offset. */
9397 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9398 relend[-1] = tmp;
9399 }
9400 relend[-1].r_offset += patch_off - offset;
9401 }
9402 else
9403 rel = NULL;
9404
9405 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9406 && (insn & 2) == 0 /* relative */)
9407 {
9408 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9409
9410 delta += offset - patch_off;
9411 if (info->relocatable && rel != NULL)
9412 delta = 0;
9413 if (!info->relocatable && rel != NULL)
9414 {
9415 enum elf_ppc_reloc_type r_type;
9416
9417 r_type = ELF32_R_TYPE (relend[-1].r_info);
9418 if (r_type == R_PPC_REL14_BRTAKEN)
9419 insn |= BRANCH_PREDICT_BIT;
9420 else if (r_type == R_PPC_REL14_BRNTAKEN)
9421 insn &= ~BRANCH_PREDICT_BIT;
9422 else
9423 BFD_ASSERT (r_type == R_PPC_REL14);
9424
9425 if ((r_type == R_PPC_REL14_BRTAKEN
9426 || r_type == R_PPC_REL14_BRNTAKEN)
9427 && delta + 0x8000 < 0x10000
9428 && (bfd_signed_vma) delta < 0)
9429 insn ^= BRANCH_PREDICT_BIT;
9430 }
9431 if (delta + 0x8000 < 0x10000)
9432 {
9433 bfd_put_32 (input_bfd,
9434 (insn & ~0xfffc) | (delta & 0xfffc),
9435 contents + patch_off);
9436 patch_off += 4;
9437 bfd_put_32 (input_bfd,
9438 B | ((offset + 4 - patch_off) & 0x3fffffc),
9439 contents + patch_off);
9440 patch_off += 4;
9441 }
9442 else
9443 {
9444 if (rel != NULL)
9445 {
9446 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9447
9448 relend[-1].r_offset += 8;
9449 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9450 }
9451 bfd_put_32 (input_bfd,
9452 (insn & ~0xfffc) | 8,
9453 contents + patch_off);
9454 patch_off += 4;
9455 bfd_put_32 (input_bfd,
9456 B | ((offset + 4 - patch_off) & 0x3fffffc),
9457 contents + patch_off);
9458 patch_off += 4;
9459 bfd_put_32 (input_bfd,
9460 B | ((delta - 8) & 0x3fffffc),
9461 contents + patch_off);
9462 patch_off += 4;
9463 }
9464 }
9465 else
9466 {
9467 bfd_put_32 (input_bfd, insn, contents + patch_off);
9468 patch_off += 4;
9469 bfd_put_32 (input_bfd,
9470 B | ((offset + 4 - patch_off) & 0x3fffffc),
9471 contents + patch_off);
9472 patch_off += 4;
9473 }
9474 BFD_ASSERT (patch_off <= input_section->size);
9475 relax_info->workaround_size = input_section->size - patch_off;
9476 }
9477 }
9478
9479 return ret;
9480 }
9481 \f
9482 /* Finish up dynamic symbol handling. We set the contents of various
9483 dynamic sections here. */
9484
9485 static bfd_boolean
9486 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9487 struct bfd_link_info *info,
9488 struct elf_link_hash_entry *h,
9489 Elf_Internal_Sym *sym)
9490 {
9491 struct ppc_elf_link_hash_table *htab;
9492 struct plt_entry *ent;
9493 bfd_boolean doneone;
9494
9495 #ifdef DEBUG
9496 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9497 h->root.root.string);
9498 #endif
9499
9500 htab = ppc_elf_hash_table (info);
9501 BFD_ASSERT (htab->elf.dynobj != NULL);
9502
9503 doneone = FALSE;
9504 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9505 if (ent->plt.offset != (bfd_vma) -1)
9506 {
9507 if (!doneone)
9508 {
9509 Elf_Internal_Rela rela;
9510 bfd_byte *loc;
9511 bfd_vma reloc_index;
9512
9513 if (htab->plt_type == PLT_NEW
9514 || !htab->elf.dynamic_sections_created
9515 || h->dynindx == -1)
9516 reloc_index = ent->plt.offset / 4;
9517 else
9518 {
9519 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9520 / htab->plt_slot_size);
9521 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9522 && htab->plt_type == PLT_OLD)
9523 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9524 }
9525
9526 /* This symbol has an entry in the procedure linkage table.
9527 Set it up. */
9528 if (htab->plt_type == PLT_VXWORKS
9529 && htab->elf.dynamic_sections_created
9530 && h->dynindx != -1)
9531 {
9532 bfd_vma got_offset;
9533 const bfd_vma *plt_entry;
9534
9535 /* The first three entries in .got.plt are reserved. */
9536 got_offset = (reloc_index + 3) * 4;
9537
9538 /* Use the right PLT. */
9539 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9540 : ppc_elf_vxworks_plt_entry;
9541
9542 /* Fill in the .plt on VxWorks. */
9543 if (info->shared)
9544 {
9545 bfd_put_32 (output_bfd,
9546 plt_entry[0] | PPC_HA (got_offset),
9547 htab->plt->contents + ent->plt.offset + 0);
9548 bfd_put_32 (output_bfd,
9549 plt_entry[1] | PPC_LO (got_offset),
9550 htab->plt->contents + ent->plt.offset + 4);
9551 }
9552 else
9553 {
9554 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9555
9556 bfd_put_32 (output_bfd,
9557 plt_entry[0] | PPC_HA (got_loc),
9558 htab->plt->contents + ent->plt.offset + 0);
9559 bfd_put_32 (output_bfd,
9560 plt_entry[1] | PPC_LO (got_loc),
9561 htab->plt->contents + ent->plt.offset + 4);
9562 }
9563
9564 bfd_put_32 (output_bfd, plt_entry[2],
9565 htab->plt->contents + ent->plt.offset + 8);
9566 bfd_put_32 (output_bfd, plt_entry[3],
9567 htab->plt->contents + ent->plt.offset + 12);
9568
9569 /* This instruction is an immediate load. The value loaded is
9570 the byte offset of the R_PPC_JMP_SLOT relocation from the
9571 start of the .rela.plt section. The value is stored in the
9572 low-order 16 bits of the load instruction. */
9573 /* NOTE: It appears that this is now an index rather than a
9574 prescaled offset. */
9575 bfd_put_32 (output_bfd,
9576 plt_entry[4] | reloc_index,
9577 htab->plt->contents + ent->plt.offset + 16);
9578 /* This instruction is a PC-relative branch whose target is
9579 the start of the PLT section. The address of this branch
9580 instruction is 20 bytes beyond the start of this PLT entry.
9581 The address is encoded in bits 6-29, inclusive. The value
9582 stored is right-shifted by two bits, permitting a 26-bit
9583 offset. */
9584 bfd_put_32 (output_bfd,
9585 (plt_entry[5]
9586 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9587 htab->plt->contents + ent->plt.offset + 20);
9588 bfd_put_32 (output_bfd, plt_entry[6],
9589 htab->plt->contents + ent->plt.offset + 24);
9590 bfd_put_32 (output_bfd, plt_entry[7],
9591 htab->plt->contents + ent->plt.offset + 28);
9592
9593 /* Fill in the GOT entry corresponding to this PLT slot with
9594 the address immediately after the "bctr" instruction
9595 in this PLT entry. */
9596 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9597 + htab->plt->output_offset
9598 + ent->plt.offset + 16),
9599 htab->sgotplt->contents + got_offset);
9600
9601 if (!info->shared)
9602 {
9603 /* Fill in a couple of entries in .rela.plt.unloaded. */
9604 loc = htab->srelplt2->contents
9605 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9606 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9607 * sizeof (Elf32_External_Rela));
9608
9609 /* Provide the @ha relocation for the first instruction. */
9610 rela.r_offset = (htab->plt->output_section->vma
9611 + htab->plt->output_offset
9612 + ent->plt.offset + 2);
9613 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9614 R_PPC_ADDR16_HA);
9615 rela.r_addend = got_offset;
9616 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9617 loc += sizeof (Elf32_External_Rela);
9618
9619 /* Provide the @l relocation for the second instruction. */
9620 rela.r_offset = (htab->plt->output_section->vma
9621 + htab->plt->output_offset
9622 + ent->plt.offset + 6);
9623 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9624 R_PPC_ADDR16_LO);
9625 rela.r_addend = got_offset;
9626 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9627 loc += sizeof (Elf32_External_Rela);
9628
9629 /* Provide a relocation for the GOT entry corresponding to this
9630 PLT slot. Point it at the middle of the .plt entry. */
9631 rela.r_offset = (htab->sgotplt->output_section->vma
9632 + htab->sgotplt->output_offset
9633 + got_offset);
9634 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9635 R_PPC_ADDR32);
9636 rela.r_addend = ent->plt.offset + 16;
9637 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9638 }
9639
9640 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9641 In particular, the offset for the relocation is not the
9642 address of the PLT entry for this function, as specified
9643 by the ABI. Instead, the offset is set to the address of
9644 the GOT slot for this function. See EABI 4.4.4.1. */
9645 rela.r_offset = (htab->sgotplt->output_section->vma
9646 + htab->sgotplt->output_offset
9647 + got_offset);
9648
9649 }
9650 else
9651 {
9652 asection *splt = htab->plt;
9653 if (!htab->elf.dynamic_sections_created
9654 || h->dynindx == -1)
9655 splt = htab->iplt;
9656
9657 rela.r_offset = (splt->output_section->vma
9658 + splt->output_offset
9659 + ent->plt.offset);
9660 if (htab->plt_type == PLT_OLD
9661 || !htab->elf.dynamic_sections_created
9662 || h->dynindx == -1)
9663 {
9664 /* We don't need to fill in the .plt. The ppc dynamic
9665 linker will fill it in. */
9666 }
9667 else
9668 {
9669 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9670 + htab->glink->output_section->vma
9671 + htab->glink->output_offset);
9672 bfd_put_32 (output_bfd, val,
9673 splt->contents + ent->plt.offset);
9674 }
9675 }
9676
9677 /* Fill in the entry in the .rela.plt section. */
9678 rela.r_addend = 0;
9679 if (!htab->elf.dynamic_sections_created
9680 || h->dynindx == -1)
9681 {
9682 BFD_ASSERT (h->type == STT_GNU_IFUNC
9683 && h->def_regular
9684 && (h->root.type == bfd_link_hash_defined
9685 || h->root.type == bfd_link_hash_defweak));
9686 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9687 rela.r_addend = SYM_VAL (h);
9688 }
9689 else
9690 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9691
9692 if (!htab->elf.dynamic_sections_created
9693 || h->dynindx == -1)
9694 loc = (htab->reliplt->contents
9695 + (htab->reliplt->reloc_count++
9696 * sizeof (Elf32_External_Rela)));
9697 else
9698 loc = (htab->relplt->contents
9699 + reloc_index * sizeof (Elf32_External_Rela));
9700 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9701
9702 if (!h->def_regular)
9703 {
9704 /* Mark the symbol as undefined, rather than as
9705 defined in the .plt section. Leave the value if
9706 there were any relocations where pointer equality
9707 matters (this is a clue for the dynamic linker, to
9708 make function pointer comparisons work between an
9709 application and shared library), otherwise set it
9710 to zero. */
9711 sym->st_shndx = SHN_UNDEF;
9712 if (!h->pointer_equality_needed)
9713 sym->st_value = 0;
9714 else if (!h->ref_regular_nonweak)
9715 {
9716 /* This breaks function pointer comparisons, but
9717 that is better than breaking tests for a NULL
9718 function pointer. */
9719 sym->st_value = 0;
9720 }
9721 }
9722 else if (h->type == STT_GNU_IFUNC
9723 && !info->shared)
9724 {
9725 /* Set the value of ifunc symbols in a non-pie
9726 executable to the glink entry. This is to avoid
9727 text relocations. We can't do this for ifunc in
9728 allocate_dynrelocs, as we do for normal dynamic
9729 function symbols with plt entries, because we need
9730 to keep the original value around for the ifunc
9731 relocation. */
9732 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9733 (output_bfd, htab->glink->output_section));
9734 sym->st_value = (ent->glink_offset
9735 + htab->glink->output_offset
9736 + htab->glink->output_section->vma);
9737 }
9738 doneone = TRUE;
9739 }
9740
9741 if (htab->plt_type == PLT_NEW
9742 || !htab->elf.dynamic_sections_created
9743 || h->dynindx == -1)
9744 {
9745 unsigned char *p;
9746 asection *splt = htab->plt;
9747 if (!htab->elf.dynamic_sections_created
9748 || h->dynindx == -1)
9749 splt = htab->iplt;
9750
9751 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9752
9753 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9754 {
9755 bfd_put_32 (output_bfd, LWZ_11_3, p);
9756 p += 4;
9757 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9758 p += 4;
9759 bfd_put_32 (output_bfd, MR_0_3, p);
9760 p += 4;
9761 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9762 p += 4;
9763 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9764 p += 4;
9765 bfd_put_32 (output_bfd, BEQLR, p);
9766 p += 4;
9767 bfd_put_32 (output_bfd, MR_3_0, p);
9768 p += 4;
9769 bfd_put_32 (output_bfd, NOP, p);
9770 p += 4;
9771 }
9772
9773 write_glink_stub (ent, splt, p, info);
9774
9775 if (!info->shared)
9776 /* We only need one non-PIC glink stub. */
9777 break;
9778 }
9779 else
9780 break;
9781 }
9782
9783 if (h->needs_copy)
9784 {
9785 asection *s;
9786 Elf_Internal_Rela rela;
9787 bfd_byte *loc;
9788
9789 /* This symbols needs a copy reloc. Set it up. */
9790
9791 #ifdef DEBUG
9792 fprintf (stderr, ", copy");
9793 #endif
9794
9795 BFD_ASSERT (h->dynindx != -1);
9796
9797 if (ppc_elf_hash_entry (h)->has_sda_refs)
9798 s = htab->relsbss;
9799 else
9800 s = htab->relbss;
9801 BFD_ASSERT (s != NULL);
9802
9803 rela.r_offset = SYM_VAL (h);
9804 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9805 rela.r_addend = 0;
9806 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9807 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9808 }
9809
9810 #ifdef DEBUG
9811 fprintf (stderr, "\n");
9812 #endif
9813
9814 return TRUE;
9815 }
9816 \f
9817 static enum elf_reloc_type_class
9818 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9819 const asection *rel_sec,
9820 const Elf_Internal_Rela *rela)
9821 {
9822 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9823
9824 if (rel_sec == htab->reliplt)
9825 return reloc_class_ifunc;
9826
9827 switch (ELF32_R_TYPE (rela->r_info))
9828 {
9829 case R_PPC_RELATIVE:
9830 return reloc_class_relative;
9831 case R_PPC_JMP_SLOT:
9832 return reloc_class_plt;
9833 case R_PPC_COPY:
9834 return reloc_class_copy;
9835 default:
9836 return reloc_class_normal;
9837 }
9838 }
9839 \f
9840 /* Finish up the dynamic sections. */
9841
9842 static bfd_boolean
9843 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9844 struct bfd_link_info *info)
9845 {
9846 asection *sdyn;
9847 asection *splt;
9848 struct ppc_elf_link_hash_table *htab;
9849 bfd_vma got;
9850 bfd *dynobj;
9851 bfd_boolean ret = TRUE;
9852
9853 #ifdef DEBUG
9854 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9855 #endif
9856
9857 htab = ppc_elf_hash_table (info);
9858 dynobj = elf_hash_table (info)->dynobj;
9859 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9860 if (htab->is_vxworks)
9861 splt = bfd_get_linker_section (dynobj, ".plt");
9862 else
9863 splt = NULL;
9864
9865 got = 0;
9866 if (htab->elf.hgot != NULL)
9867 got = SYM_VAL (htab->elf.hgot);
9868
9869 if (htab->elf.dynamic_sections_created)
9870 {
9871 Elf32_External_Dyn *dyncon, *dynconend;
9872
9873 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9874
9875 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9876 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9877 for (; dyncon < dynconend; dyncon++)
9878 {
9879 Elf_Internal_Dyn dyn;
9880 asection *s;
9881
9882 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9883
9884 switch (dyn.d_tag)
9885 {
9886 case DT_PLTGOT:
9887 if (htab->is_vxworks)
9888 s = htab->sgotplt;
9889 else
9890 s = htab->plt;
9891 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9892 break;
9893
9894 case DT_PLTRELSZ:
9895 dyn.d_un.d_val = htab->relplt->size;
9896 break;
9897
9898 case DT_JMPREL:
9899 s = htab->relplt;
9900 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9901 break;
9902
9903 case DT_PPC_GOT:
9904 dyn.d_un.d_ptr = got;
9905 break;
9906
9907 case DT_RELASZ:
9908 if (htab->is_vxworks)
9909 {
9910 if (htab->relplt)
9911 dyn.d_un.d_ptr -= htab->relplt->size;
9912 break;
9913 }
9914 continue;
9915
9916 default:
9917 if (htab->is_vxworks
9918 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9919 break;
9920 continue;
9921 }
9922
9923 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9924 }
9925 }
9926
9927 if (htab->got != NULL)
9928 {
9929 if (htab->elf.hgot->root.u.def.section == htab->got
9930 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9931 {
9932 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9933
9934 p += htab->elf.hgot->root.u.def.value;
9935 if (htab->plt_type == PLT_OLD)
9936 {
9937 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9938 so that a function can easily find the address of
9939 _GLOBAL_OFFSET_TABLE_. */
9940 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9941 < htab->elf.hgot->root.u.def.section->size);
9942 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9943 }
9944
9945 if (sdyn != NULL)
9946 {
9947 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9948 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9949 < htab->elf.hgot->root.u.def.section->size);
9950 bfd_put_32 (output_bfd, val, p);
9951 }
9952 }
9953 else
9954 {
9955 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9956 htab->elf.hgot->root.root.string,
9957 (htab->sgotplt != NULL
9958 ? htab->sgotplt->name : htab->got->name));
9959 bfd_set_error (bfd_error_bad_value);
9960 ret = FALSE;
9961 }
9962
9963 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9964 }
9965
9966 /* Fill in the first entry in the VxWorks procedure linkage table. */
9967 if (splt && splt->size > 0)
9968 {
9969 /* Use the right PLT. */
9970 const bfd_vma *plt_entry = (info->shared
9971 ? ppc_elf_vxworks_pic_plt0_entry
9972 : ppc_elf_vxworks_plt0_entry);
9973
9974 if (!info->shared)
9975 {
9976 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9977
9978 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9979 splt->contents + 0);
9980 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9981 splt->contents + 4);
9982 }
9983 else
9984 {
9985 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9986 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9987 }
9988 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9989 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9990 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9991 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9992 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9993 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9994
9995 if (! info->shared)
9996 {
9997 Elf_Internal_Rela rela;
9998 bfd_byte *loc;
9999
10000 loc = htab->srelplt2->contents;
10001
10002 /* Output the @ha relocation for the first instruction. */
10003 rela.r_offset = (htab->plt->output_section->vma
10004 + htab->plt->output_offset
10005 + 2);
10006 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10007 rela.r_addend = 0;
10008 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10009 loc += sizeof (Elf32_External_Rela);
10010
10011 /* Output the @l relocation for the second instruction. */
10012 rela.r_offset = (htab->plt->output_section->vma
10013 + htab->plt->output_offset
10014 + 6);
10015 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10016 rela.r_addend = 0;
10017 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10018 loc += sizeof (Elf32_External_Rela);
10019
10020 /* Fix up the remaining relocations. They may have the wrong
10021 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10022 in which symbols were output. */
10023 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10024 {
10025 Elf_Internal_Rela rel;
10026
10027 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10028 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10029 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10030 loc += sizeof (Elf32_External_Rela);
10031
10032 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10033 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10034 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10035 loc += sizeof (Elf32_External_Rela);
10036
10037 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10038 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10039 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10040 loc += sizeof (Elf32_External_Rela);
10041 }
10042 }
10043 }
10044
10045 if (htab->glink != NULL
10046 && htab->glink->contents != NULL
10047 && htab->elf.dynamic_sections_created)
10048 {
10049 unsigned char *p;
10050 unsigned char *endp;
10051 bfd_vma res0;
10052 unsigned int i;
10053
10054 /*
10055 * PIC glink code is the following:
10056 *
10057 * # ith PLT code stub.
10058 * addis 11,30,(plt+(i-1)*4-got)@ha
10059 * lwz 11,(plt+(i-1)*4-got)@l(11)
10060 * mtctr 11
10061 * bctr
10062 *
10063 * # A table of branches, one for each plt entry.
10064 * # The idea is that the plt call stub loads ctr and r11 with these
10065 * # addresses, so (r11 - res_0) gives the plt index * 4.
10066 * res_0: b PLTresolve
10067 * res_1: b PLTresolve
10068 * .
10069 * # Some number of entries towards the end can be nops
10070 * res_n_m3: nop
10071 * res_n_m2: nop
10072 * res_n_m1:
10073 *
10074 * PLTresolve:
10075 * addis 11,11,(1f-res_0)@ha
10076 * mflr 0
10077 * bcl 20,31,1f
10078 * 1: addi 11,11,(1b-res_0)@l
10079 * mflr 12
10080 * mtlr 0
10081 * sub 11,11,12 # r11 = index * 4
10082 * addis 12,12,(got+4-1b)@ha
10083 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10084 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10085 * mtctr 0
10086 * add 0,11,11
10087 * add 11,0,11 # r11 = index * 12 = reloc offset.
10088 * bctr
10089 */
10090 static const unsigned int pic_plt_resolve[] =
10091 {
10092 ADDIS_11_11,
10093 MFLR_0,
10094 BCL_20_31,
10095 ADDI_11_11,
10096 MFLR_12,
10097 MTLR_0,
10098 SUB_11_11_12,
10099 ADDIS_12_12,
10100 LWZ_0_12,
10101 LWZ_12_12,
10102 MTCTR_0,
10103 ADD_0_11_11,
10104 ADD_11_0_11,
10105 BCTR,
10106 NOP,
10107 NOP
10108 };
10109
10110 /*
10111 * Non-PIC glink code is a little simpler.
10112 *
10113 * # ith PLT code stub.
10114 * lis 11,(plt+(i-1)*4)@ha
10115 * lwz 11,(plt+(i-1)*4)@l(11)
10116 * mtctr 11
10117 * bctr
10118 *
10119 * The branch table is the same, then comes
10120 *
10121 * PLTresolve:
10122 * lis 12,(got+4)@ha
10123 * addis 11,11,(-res_0)@ha
10124 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10125 * addi 11,11,(-res_0)@l # r11 = index * 4
10126 * mtctr 0
10127 * add 0,11,11
10128 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10129 * add 11,0,11 # r11 = index * 12 = reloc offset.
10130 * bctr
10131 */
10132 static const unsigned int plt_resolve[] =
10133 {
10134 LIS_12,
10135 ADDIS_11_11,
10136 LWZ_0_12,
10137 ADDI_11_11,
10138 MTCTR_0,
10139 ADD_0_11_11,
10140 LWZ_12_12,
10141 ADD_11_0_11,
10142 BCTR,
10143 NOP,
10144 NOP,
10145 NOP,
10146 NOP,
10147 NOP,
10148 NOP,
10149 NOP
10150 };
10151
10152 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10153 abort ();
10154 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10155 abort ();
10156
10157 /* Build the branch table, one for each plt entry (less one),
10158 and perhaps some padding. */
10159 p = htab->glink->contents;
10160 p += htab->glink_pltresolve;
10161 endp = htab->glink->contents;
10162 endp += htab->glink->size - GLINK_PLTRESOLVE;
10163 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10164 {
10165 bfd_put_32 (output_bfd, B + endp - p, p);
10166 p += 4;
10167 }
10168 while (p < endp)
10169 {
10170 bfd_put_32 (output_bfd, NOP, p);
10171 p += 4;
10172 }
10173
10174 res0 = (htab->glink_pltresolve
10175 + htab->glink->output_section->vma
10176 + htab->glink->output_offset);
10177
10178 if (htab->params->ppc476_workaround)
10179 {
10180 /* Ensure that a call stub at the end of a page doesn't
10181 result in prefetch over the end of the page into the
10182 glink branch table. */
10183 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10184 bfd_vma page_addr;
10185 bfd_vma glink_start = (htab->glink->output_section->vma
10186 + htab->glink->output_offset);
10187
10188 for (page_addr = res0 & -pagesize;
10189 page_addr > glink_start;
10190 page_addr -= pagesize)
10191 {
10192 /* We have a plt call stub that may need fixing. */
10193 bfd_byte *loc;
10194 unsigned int insn;
10195
10196 loc = htab->glink->contents + page_addr - 4 - glink_start;
10197 insn = bfd_get_32 (output_bfd, loc);
10198 if (insn == BCTR)
10199 {
10200 /* By alignment, we know that there must be at least
10201 one other call stub before this one. */
10202 insn = bfd_get_32 (output_bfd, loc - 16);
10203 if (insn == BCTR)
10204 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10205 else
10206 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10207 }
10208 }
10209 }
10210
10211 /* Last comes the PLTresolve stub. */
10212 if (info->shared)
10213 {
10214 bfd_vma bcl;
10215
10216 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10217 {
10218 unsigned int insn = pic_plt_resolve[i];
10219
10220 if (htab->params->ppc476_workaround && insn == NOP)
10221 insn = BA + 0;
10222 bfd_put_32 (output_bfd, insn, p);
10223 p += 4;
10224 }
10225 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10226
10227 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10228 + htab->glink->output_section->vma
10229 + htab->glink->output_offset);
10230
10231 bfd_put_32 (output_bfd,
10232 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10233 bfd_put_32 (output_bfd,
10234 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10235 bfd_put_32 (output_bfd,
10236 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10237 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10238 {
10239 bfd_put_32 (output_bfd,
10240 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10241 bfd_put_32 (output_bfd,
10242 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10243 }
10244 else
10245 {
10246 bfd_put_32 (output_bfd,
10247 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10248 bfd_put_32 (output_bfd,
10249 LWZ_12_12 + 4, p + 9*4);
10250 }
10251 }
10252 else
10253 {
10254 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10255 {
10256 unsigned int insn = plt_resolve[i];
10257
10258 if (htab->params->ppc476_workaround && insn == NOP)
10259 insn = BA + 0;
10260 bfd_put_32 (output_bfd, insn, p);
10261 p += 4;
10262 }
10263 p -= 4 * ARRAY_SIZE (plt_resolve);
10264
10265 bfd_put_32 (output_bfd,
10266 LIS_12 + PPC_HA (got + 4), p + 0*4);
10267 bfd_put_32 (output_bfd,
10268 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10269 bfd_put_32 (output_bfd,
10270 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10271 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10272 {
10273 bfd_put_32 (output_bfd,
10274 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10275 bfd_put_32 (output_bfd,
10276 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10277 }
10278 else
10279 {
10280 bfd_put_32 (output_bfd,
10281 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10282 bfd_put_32 (output_bfd,
10283 LWZ_12_12 + 4, p + 6*4);
10284 }
10285 }
10286 }
10287
10288 if (htab->glink_eh_frame != NULL
10289 && htab->glink_eh_frame->contents != NULL)
10290 {
10291 unsigned char *p = htab->glink_eh_frame->contents;
10292 bfd_vma val;
10293
10294 p += sizeof (glink_eh_frame_cie);
10295 /* FDE length. */
10296 p += 4;
10297 /* CIE pointer. */
10298 p += 4;
10299 /* Offset to .glink. */
10300 val = (htab->glink->output_section->vma
10301 + htab->glink->output_offset);
10302 val -= (htab->glink_eh_frame->output_section->vma
10303 + htab->glink_eh_frame->output_offset);
10304 val -= p - htab->glink_eh_frame->contents;
10305 bfd_put_32 (htab->elf.dynobj, val, p);
10306
10307 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10308 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10309 htab->glink_eh_frame,
10310 htab->glink_eh_frame->contents))
10311 return FALSE;
10312 }
10313
10314 return ret;
10315 }
10316 \f
10317 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10318 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10319 #define TARGET_BIG_SYM powerpc_elf32_vec
10320 #define TARGET_BIG_NAME "elf32-powerpc"
10321 #define ELF_ARCH bfd_arch_powerpc
10322 #define ELF_TARGET_ID PPC32_ELF_DATA
10323 #define ELF_MACHINE_CODE EM_PPC
10324 #ifdef __QNXTARGET__
10325 #define ELF_MAXPAGESIZE 0x1000
10326 #else
10327 #define ELF_MAXPAGESIZE 0x10000
10328 #endif
10329 #define ELF_MINPAGESIZE 0x1000
10330 #define ELF_COMMONPAGESIZE 0x1000
10331 #define elf_info_to_howto ppc_elf_info_to_howto
10332
10333 #ifdef EM_CYGNUS_POWERPC
10334 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10335 #endif
10336
10337 #ifdef EM_PPC_OLD
10338 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10339 #endif
10340
10341 #define elf_backend_plt_not_loaded 1
10342 #define elf_backend_can_gc_sections 1
10343 #define elf_backend_can_refcount 1
10344 #define elf_backend_rela_normal 1
10345 #define elf_backend_caches_rawsize 1
10346
10347 #define bfd_elf32_mkobject ppc_elf_mkobject
10348 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10349 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10350 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10351 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10352 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10353 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10354 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10355
10356 #define elf_backend_object_p ppc_elf_object_p
10357 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10358 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10359 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10360 #define elf_backend_relocate_section ppc_elf_relocate_section
10361 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10362 #define elf_backend_check_relocs ppc_elf_check_relocs
10363 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10364 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10365 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10366 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10367 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10368 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10369 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10370 #define elf_backend_fake_sections ppc_elf_fake_sections
10371 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10372 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10373 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10374 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10375 #define elf_backend_write_core_note ppc_elf_write_core_note
10376 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10377 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10378 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10379 #define elf_backend_write_section ppc_elf_write_section
10380 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10381 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10382 #define elf_backend_action_discarded ppc_elf_action_discarded
10383 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10384 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10385 #define elf_backend_section_processing ppc_elf_section_processing
10386
10387 #include "elf32-target.h"
10388
10389 /* FreeBSD Target */
10390
10391 #undef TARGET_LITTLE_SYM
10392 #undef TARGET_LITTLE_NAME
10393
10394 #undef TARGET_BIG_SYM
10395 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10396 #undef TARGET_BIG_NAME
10397 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10398
10399 #undef ELF_OSABI
10400 #define ELF_OSABI ELFOSABI_FREEBSD
10401
10402 #undef elf32_bed
10403 #define elf32_bed elf32_powerpc_fbsd_bed
10404
10405 #include "elf32-target.h"
10406
10407 /* VxWorks Target */
10408
10409 #undef TARGET_LITTLE_SYM
10410 #undef TARGET_LITTLE_NAME
10411
10412 #undef TARGET_BIG_SYM
10413 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10414 #undef TARGET_BIG_NAME
10415 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10416
10417 #undef ELF_OSABI
10418
10419 /* VxWorks uses the elf default section flags for .plt. */
10420 static const struct bfd_elf_special_section *
10421 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10422 {
10423 if (sec->name == NULL)
10424 return NULL;
10425
10426 if (strcmp (sec->name, ".plt") == 0)
10427 return _bfd_elf_get_sec_type_attr (abfd, sec);
10428
10429 return ppc_elf_get_sec_type_attr (abfd, sec);
10430 }
10431
10432 /* Like ppc_elf_link_hash_table_create, but overrides
10433 appropriately for VxWorks. */
10434 static struct bfd_link_hash_table *
10435 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10436 {
10437 struct bfd_link_hash_table *ret;
10438
10439 ret = ppc_elf_link_hash_table_create (abfd);
10440 if (ret)
10441 {
10442 struct ppc_elf_link_hash_table *htab
10443 = (struct ppc_elf_link_hash_table *)ret;
10444 htab->is_vxworks = 1;
10445 htab->plt_type = PLT_VXWORKS;
10446 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10447 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10448 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10449 }
10450 return ret;
10451 }
10452
10453 /* Tweak magic VxWorks symbols as they are loaded. */
10454 static bfd_boolean
10455 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10456 struct bfd_link_info *info,
10457 Elf_Internal_Sym *sym,
10458 const char **namep ATTRIBUTE_UNUSED,
10459 flagword *flagsp ATTRIBUTE_UNUSED,
10460 asection **secp,
10461 bfd_vma *valp)
10462 {
10463 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10464 valp))
10465 return FALSE;
10466
10467 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10468 }
10469
10470 static void
10471 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10472 {
10473 ppc_elf_final_write_processing(abfd, linker);
10474 elf_vxworks_final_write_processing(abfd, linker);
10475 }
10476
10477 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10478 define it. */
10479 #undef elf_backend_want_plt_sym
10480 #define elf_backend_want_plt_sym 1
10481 #undef elf_backend_want_got_plt
10482 #define elf_backend_want_got_plt 1
10483 #undef elf_backend_got_symbol_offset
10484 #define elf_backend_got_symbol_offset 0
10485 #undef elf_backend_plt_not_loaded
10486 #define elf_backend_plt_not_loaded 0
10487 #undef elf_backend_plt_readonly
10488 #define elf_backend_plt_readonly 1
10489 #undef elf_backend_got_header_size
10490 #define elf_backend_got_header_size 12
10491
10492 #undef bfd_elf32_get_synthetic_symtab
10493
10494 #undef bfd_elf32_bfd_link_hash_table_create
10495 #define bfd_elf32_bfd_link_hash_table_create \
10496 ppc_elf_vxworks_link_hash_table_create
10497 #undef elf_backend_add_symbol_hook
10498 #define elf_backend_add_symbol_hook \
10499 ppc_elf_vxworks_add_symbol_hook
10500 #undef elf_backend_link_output_symbol_hook
10501 #define elf_backend_link_output_symbol_hook \
10502 elf_vxworks_link_output_symbol_hook
10503 #undef elf_backend_final_write_processing
10504 #define elf_backend_final_write_processing \
10505 ppc_elf_vxworks_final_write_processing
10506 #undef elf_backend_get_sec_type_attr
10507 #define elf_backend_get_sec_type_attr \
10508 ppc_elf_vxworks_get_sec_type_attr
10509 #undef elf_backend_emit_relocs
10510 #define elf_backend_emit_relocs \
10511 elf_vxworks_emit_relocs
10512
10513 #undef elf32_bed
10514 #define elf32_bed ppc_elf_vxworks_bed
10515 #undef elf_backend_post_process_headers
10516
10517 #include "elf32-target.h"
GDB Binutils - Deliverables
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