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bfd target vector rationalisation
[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 static bfd_boolean
3342 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3343 {
3344 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3345 asection *s;
3346 flagword flags;
3347
3348 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3349 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3350 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3351 htab->glink = s;
3352 if (s == NULL
3353 || !bfd_set_section_alignment (abfd, s,
3354 htab->params->ppc476_workaround ? 6 : 4))
3355 return FALSE;
3356
3357 if (!info->no_ld_generated_unwind_info)
3358 {
3359 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3360 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3361 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3362 htab->glink_eh_frame = s;
3363 if (s == NULL
3364 || !bfd_set_section_alignment (abfd, s, 2))
3365 return FALSE;
3366 }
3367
3368 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3369 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3370 htab->iplt = s;
3371 if (s == NULL
3372 || !bfd_set_section_alignment (abfd, s, 4))
3373 return FALSE;
3374
3375 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3376 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3377 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3378 htab->reliplt = s;
3379 if (s == NULL
3380 || ! bfd_set_section_alignment (abfd, s, 2))
3381 return FALSE;
3382 return TRUE;
3383 }
3384
3385 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3386 to output sections (just like _bfd_elf_create_dynamic_sections has
3387 to create .dynbss and .rela.bss). */
3388
3389 static bfd_boolean
3390 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3391 {
3392 struct ppc_elf_link_hash_table *htab;
3393 asection *s;
3394 flagword flags;
3395
3396 htab = ppc_elf_hash_table (info);
3397
3398 if (htab->got == NULL
3399 && !ppc_elf_create_got (abfd, info))
3400 return FALSE;
3401
3402 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3403 return FALSE;
3404
3405 if (htab->glink == NULL
3406 && !ppc_elf_create_glink (abfd, info))
3407 return FALSE;
3408
3409 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3410 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3411 SEC_ALLOC | SEC_LINKER_CREATED);
3412 htab->dynsbss = s;
3413 if (s == NULL)
3414 return FALSE;
3415
3416 if (! info->shared)
3417 {
3418 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3419 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3420 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3421 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3422 htab->relsbss = s;
3423 if (s == NULL
3424 || ! bfd_set_section_alignment (abfd, s, 2))
3425 return FALSE;
3426 }
3427
3428 if (htab->is_vxworks
3429 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3430 return FALSE;
3431
3432 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3433 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3434 if (s == NULL)
3435 abort ();
3436
3437 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3438 if (htab->plt_type == PLT_VXWORKS)
3439 /* The VxWorks PLT is a loaded section with contents. */
3440 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3441 return bfd_set_section_flags (abfd, s, flags);
3442 }
3443
3444 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3445
3446 static void
3447 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3448 struct elf_link_hash_entry *dir,
3449 struct elf_link_hash_entry *ind)
3450 {
3451 struct ppc_elf_link_hash_entry *edir, *eind;
3452
3453 edir = (struct ppc_elf_link_hash_entry *) dir;
3454 eind = (struct ppc_elf_link_hash_entry *) ind;
3455
3456 edir->tls_mask |= eind->tls_mask;
3457 edir->has_sda_refs |= eind->has_sda_refs;
3458
3459 /* If called to transfer flags for a weakdef during processing
3460 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3461 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3462 if (!(ELIMINATE_COPY_RELOCS
3463 && eind->elf.root.type != bfd_link_hash_indirect
3464 && edir->elf.dynamic_adjusted))
3465 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3466
3467 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3468 edir->elf.ref_regular |= eind->elf.ref_regular;
3469 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3470 edir->elf.needs_plt |= eind->elf.needs_plt;
3471 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3472
3473 if (eind->dyn_relocs != NULL)
3474 {
3475 if (edir->dyn_relocs != NULL)
3476 {
3477 struct elf_dyn_relocs **pp;
3478 struct elf_dyn_relocs *p;
3479
3480 /* Add reloc counts against the indirect sym to the direct sym
3481 list. Merge any entries against the same section. */
3482 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3483 {
3484 struct elf_dyn_relocs *q;
3485
3486 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3487 if (q->sec == p->sec)
3488 {
3489 q->pc_count += p->pc_count;
3490 q->count += p->count;
3491 *pp = p->next;
3492 break;
3493 }
3494 if (q == NULL)
3495 pp = &p->next;
3496 }
3497 *pp = edir->dyn_relocs;
3498 }
3499
3500 edir->dyn_relocs = eind->dyn_relocs;
3501 eind->dyn_relocs = NULL;
3502 }
3503
3504 /* If we were called to copy over info for a weak sym, that's all.
3505 You might think dyn_relocs need not be copied over; After all,
3506 both syms will be dynamic or both non-dynamic so we're just
3507 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3508 code in ppc_elf_adjust_dynamic_symbol needs to check for
3509 dyn_relocs in read-only sections, and it does so on what is the
3510 DIR sym here. */
3511 if (eind->elf.root.type != bfd_link_hash_indirect)
3512 return;
3513
3514 /* Copy over the GOT refcount entries that we may have already seen to
3515 the symbol which just became indirect. */
3516 edir->elf.got.refcount += eind->elf.got.refcount;
3517 eind->elf.got.refcount = 0;
3518
3519 /* And plt entries. */
3520 if (eind->elf.plt.plist != NULL)
3521 {
3522 if (edir->elf.plt.plist != NULL)
3523 {
3524 struct plt_entry **entp;
3525 struct plt_entry *ent;
3526
3527 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3528 {
3529 struct plt_entry *dent;
3530
3531 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3532 if (dent->sec == ent->sec && dent->addend == ent->addend)
3533 {
3534 dent->plt.refcount += ent->plt.refcount;
3535 *entp = ent->next;
3536 break;
3537 }
3538 if (dent == NULL)
3539 entp = &ent->next;
3540 }
3541 *entp = edir->elf.plt.plist;
3542 }
3543
3544 edir->elf.plt.plist = eind->elf.plt.plist;
3545 eind->elf.plt.plist = NULL;
3546 }
3547
3548 if (eind->elf.dynindx != -1)
3549 {
3550 if (edir->elf.dynindx != -1)
3551 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3552 edir->elf.dynstr_index);
3553 edir->elf.dynindx = eind->elf.dynindx;
3554 edir->elf.dynstr_index = eind->elf.dynstr_index;
3555 eind->elf.dynindx = -1;
3556 eind->elf.dynstr_index = 0;
3557 }
3558 }
3559
3560 /* Hook called by the linker routine which adds symbols from an object
3561 file. We use it to put .comm items in .sbss, and not .bss. */
3562
3563 static bfd_boolean
3564 ppc_elf_add_symbol_hook (bfd *abfd,
3565 struct bfd_link_info *info,
3566 Elf_Internal_Sym *sym,
3567 const char **namep ATTRIBUTE_UNUSED,
3568 flagword *flagsp ATTRIBUTE_UNUSED,
3569 asection **secp,
3570 bfd_vma *valp)
3571 {
3572 if (sym->st_shndx == SHN_COMMON
3573 && !info->relocatable
3574 && is_ppc_elf (info->output_bfd)
3575 && sym->st_size <= elf_gp_size (abfd))
3576 {
3577 /* Common symbols less than or equal to -G nn bytes are automatically
3578 put into .sbss. */
3579 struct ppc_elf_link_hash_table *htab;
3580
3581 htab = ppc_elf_hash_table (info);
3582 if (htab->sbss == NULL)
3583 {
3584 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3585
3586 if (!htab->elf.dynobj)
3587 htab->elf.dynobj = abfd;
3588
3589 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3590 ".sbss",
3591 flags);
3592 if (htab->sbss == NULL)
3593 return FALSE;
3594 }
3595
3596 *secp = htab->sbss;
3597 *valp = sym->st_size;
3598 }
3599
3600 if ((abfd->flags & DYNAMIC) == 0
3601 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3602 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3603 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3604
3605 return TRUE;
3606 }
3607 \f
3608 static bfd_boolean
3609 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3610 {
3611 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3612
3613 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3614 TRUE, FALSE, TRUE);
3615 if (lsect->sym == NULL)
3616 return FALSE;
3617 if (lsect->sym->root.type == bfd_link_hash_new)
3618 lsect->sym->non_elf = 0;
3619 lsect->sym->ref_regular = 1;
3620 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3621 return TRUE;
3622 }
3623
3624 /* Create a special linker section. */
3625
3626 static bfd_boolean
3627 ppc_elf_create_linker_section (bfd *abfd,
3628 struct bfd_link_info *info,
3629 flagword flags,
3630 elf_linker_section_t *lsect)
3631 {
3632 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3633 asection *s;
3634
3635 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3636 | SEC_LINKER_CREATED);
3637
3638 /* Record the first bfd that needs the special sections. */
3639 if (!htab->elf.dynobj)
3640 htab->elf.dynobj = abfd;
3641
3642 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3643 lsect->name,
3644 flags);
3645 if (s == NULL
3646 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3647 return FALSE;
3648 lsect->section = s;
3649
3650 return create_sdata_sym (info, lsect);
3651 }
3652
3653 /* Find a linker generated pointer with a given addend and type. */
3654
3655 static elf_linker_section_pointers_t *
3656 elf_find_pointer_linker_section
3657 (elf_linker_section_pointers_t *linker_pointers,
3658 bfd_vma addend,
3659 elf_linker_section_t *lsect)
3660 {
3661 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3662 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3663 return linker_pointers;
3664
3665 return NULL;
3666 }
3667
3668 /* Allocate a pointer to live in a linker created section. */
3669
3670 static bfd_boolean
3671 elf_create_pointer_linker_section (bfd *abfd,
3672 elf_linker_section_t *lsect,
3673 struct elf_link_hash_entry *h,
3674 const Elf_Internal_Rela *rel)
3675 {
3676 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3677 elf_linker_section_pointers_t *linker_section_ptr;
3678 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3679 bfd_size_type amt;
3680
3681 BFD_ASSERT (lsect != NULL);
3682
3683 /* Is this a global symbol? */
3684 if (h != NULL)
3685 {
3686 struct ppc_elf_link_hash_entry *eh;
3687
3688 /* Has this symbol already been allocated? If so, our work is done. */
3689 eh = (struct ppc_elf_link_hash_entry *) h;
3690 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3691 rel->r_addend,
3692 lsect))
3693 return TRUE;
3694
3695 ptr_linker_section_ptr = &eh->linker_section_pointer;
3696 }
3697 else
3698 {
3699 BFD_ASSERT (is_ppc_elf (abfd));
3700
3701 /* Allocation of a pointer to a local symbol. */
3702 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3703
3704 /* Allocate a table to hold the local symbols if first time. */
3705 if (!ptr)
3706 {
3707 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3708
3709 amt = num_symbols;
3710 amt *= sizeof (elf_linker_section_pointers_t *);
3711 ptr = bfd_zalloc (abfd, amt);
3712
3713 if (!ptr)
3714 return FALSE;
3715
3716 elf_local_ptr_offsets (abfd) = ptr;
3717 }
3718
3719 /* Has this symbol already been allocated? If so, our work is done. */
3720 if (elf_find_pointer_linker_section (ptr[r_symndx],
3721 rel->r_addend,
3722 lsect))
3723 return TRUE;
3724
3725 ptr_linker_section_ptr = &ptr[r_symndx];
3726 }
3727
3728 /* Allocate space for a pointer in the linker section, and allocate
3729 a new pointer record from internal memory. */
3730 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3731 amt = sizeof (elf_linker_section_pointers_t);
3732 linker_section_ptr = bfd_alloc (abfd, amt);
3733
3734 if (!linker_section_ptr)
3735 return FALSE;
3736
3737 linker_section_ptr->next = *ptr_linker_section_ptr;
3738 linker_section_ptr->addend = rel->r_addend;
3739 linker_section_ptr->lsect = lsect;
3740 *ptr_linker_section_ptr = linker_section_ptr;
3741
3742 linker_section_ptr->offset = lsect->section->size;
3743 lsect->section->size += 4;
3744
3745 #ifdef DEBUG
3746 fprintf (stderr,
3747 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3748 lsect->name, (long) linker_section_ptr->offset,
3749 (long) lsect->section->size);
3750 #endif
3751
3752 return TRUE;
3753 }
3754
3755 static struct plt_entry **
3756 update_local_sym_info (bfd *abfd,
3757 Elf_Internal_Shdr *symtab_hdr,
3758 unsigned long r_symndx,
3759 int tls_type)
3760 {
3761 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3762 struct plt_entry **local_plt;
3763 char *local_got_tls_masks;
3764
3765 if (local_got_refcounts == NULL)
3766 {
3767 bfd_size_type size = symtab_hdr->sh_info;
3768
3769 size *= (sizeof (*local_got_refcounts)
3770 + sizeof (*local_plt)
3771 + sizeof (*local_got_tls_masks));
3772 local_got_refcounts = bfd_zalloc (abfd, size);
3773 if (local_got_refcounts == NULL)
3774 return NULL;
3775 elf_local_got_refcounts (abfd) = local_got_refcounts;
3776 }
3777
3778 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3779 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3780 local_got_tls_masks[r_symndx] |= tls_type;
3781 if (tls_type != PLT_IFUNC)
3782 local_got_refcounts[r_symndx] += 1;
3783 return local_plt + r_symndx;
3784 }
3785
3786 static bfd_boolean
3787 update_plt_info (bfd *abfd, struct plt_entry **plist,
3788 asection *sec, bfd_vma addend)
3789 {
3790 struct plt_entry *ent;
3791
3792 if (addend < 32768)
3793 sec = NULL;
3794 for (ent = *plist; ent != NULL; ent = ent->next)
3795 if (ent->sec == sec && ent->addend == addend)
3796 break;
3797 if (ent == NULL)
3798 {
3799 bfd_size_type amt = sizeof (*ent);
3800 ent = bfd_alloc (abfd, amt);
3801 if (ent == NULL)
3802 return FALSE;
3803 ent->next = *plist;
3804 ent->sec = sec;
3805 ent->addend = addend;
3806 ent->plt.refcount = 0;
3807 *plist = ent;
3808 }
3809 ent->plt.refcount += 1;
3810 return TRUE;
3811 }
3812
3813 static struct plt_entry *
3814 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3815 {
3816 struct plt_entry *ent;
3817
3818 if (addend < 32768)
3819 sec = NULL;
3820 for (ent = *plist; ent != NULL; ent = ent->next)
3821 if (ent->sec == sec && ent->addend == addend)
3822 break;
3823 return ent;
3824 }
3825
3826 static bfd_boolean
3827 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3828 {
3829 return (r_type == R_PPC_PLTREL24
3830 || r_type == R_PPC_LOCAL24PC
3831 || r_type == R_PPC_REL24
3832 || r_type == R_PPC_REL14
3833 || r_type == R_PPC_REL14_BRTAKEN
3834 || r_type == R_PPC_REL14_BRNTAKEN
3835 || r_type == R_PPC_ADDR24
3836 || r_type == R_PPC_ADDR14
3837 || r_type == R_PPC_ADDR14_BRTAKEN
3838 || r_type == R_PPC_ADDR14_BRNTAKEN);
3839 }
3840
3841 static void
3842 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3843 {
3844 (*_bfd_error_handler)
3845 (_("%B: relocation %s cannot be used when making a shared object"),
3846 abfd,
3847 ppc_elf_howto_table[r_type]->name);
3848 bfd_set_error (bfd_error_bad_value);
3849 }
3850
3851 /* Look through the relocs for a section during the first phase, and
3852 allocate space in the global offset table or procedure linkage
3853 table. */
3854
3855 static bfd_boolean
3856 ppc_elf_check_relocs (bfd *abfd,
3857 struct bfd_link_info *info,
3858 asection *sec,
3859 const Elf_Internal_Rela *relocs)
3860 {
3861 struct ppc_elf_link_hash_table *htab;
3862 Elf_Internal_Shdr *symtab_hdr;
3863 struct elf_link_hash_entry **sym_hashes;
3864 const Elf_Internal_Rela *rel;
3865 const Elf_Internal_Rela *rel_end;
3866 asection *got2, *sreloc;
3867 struct elf_link_hash_entry *tga;
3868
3869 if (info->relocatable)
3870 return TRUE;
3871
3872 /* Don't do anything special with non-loaded, non-alloced sections.
3873 In particular, any relocs in such sections should not affect GOT
3874 and PLT reference counting (ie. we don't allow them to create GOT
3875 or PLT entries), there's no possibility or desire to optimize TLS
3876 relocs, and there's not much point in propagating relocs to shared
3877 libs that the dynamic linker won't relocate. */
3878 if ((sec->flags & SEC_ALLOC) == 0)
3879 return TRUE;
3880
3881 #ifdef DEBUG
3882 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3883 sec, abfd);
3884 #endif
3885
3886 BFD_ASSERT (is_ppc_elf (abfd));
3887
3888 /* Initialize howto table if not already done. */
3889 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3890 ppc_elf_howto_init ();
3891
3892 htab = ppc_elf_hash_table (info);
3893 if (htab->glink == NULL)
3894 {
3895 if (htab->elf.dynobj == NULL)
3896 htab->elf.dynobj = abfd;
3897 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3898 return FALSE;
3899 }
3900 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3901 FALSE, FALSE, TRUE);
3902 symtab_hdr = &elf_symtab_hdr (abfd);
3903 sym_hashes = elf_sym_hashes (abfd);
3904 got2 = bfd_get_section_by_name (abfd, ".got2");
3905 sreloc = NULL;
3906
3907 rel_end = relocs + sec->reloc_count;
3908 for (rel = relocs; rel < rel_end; rel++)
3909 {
3910 unsigned long r_symndx;
3911 enum elf_ppc_reloc_type r_type;
3912 struct elf_link_hash_entry *h;
3913 int tls_type;
3914
3915 r_symndx = ELF32_R_SYM (rel->r_info);
3916 if (r_symndx < symtab_hdr->sh_info)
3917 h = NULL;
3918 else
3919 {
3920 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3921 while (h->root.type == bfd_link_hash_indirect
3922 || h->root.type == bfd_link_hash_warning)
3923 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3924
3925 /* PR15323, ref flags aren't set for references in the same
3926 object. */
3927 h->root.non_ir_ref = 1;
3928 }
3929
3930 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3931 This shows up in particular in an R_PPC_ADDR32 in the eabi
3932 startup code. */
3933 if (h != NULL
3934 && htab->got == NULL
3935 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3936 {
3937 if (htab->elf.dynobj == NULL)
3938 htab->elf.dynobj = abfd;
3939 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3940 return FALSE;
3941 BFD_ASSERT (h == htab->elf.hgot);
3942 }
3943
3944 tls_type = 0;
3945 r_type = ELF32_R_TYPE (rel->r_info);
3946 if (h == NULL && !htab->is_vxworks)
3947 {
3948 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3949 abfd, r_symndx);
3950 if (isym == NULL)
3951 return FALSE;
3952
3953 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3954 {
3955 struct plt_entry **ifunc;
3956
3957 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3958 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3959 PLT_IFUNC);
3960 if (ifunc == NULL)
3961 return FALSE;
3962
3963 /* STT_GNU_IFUNC symbols must have a PLT entry;
3964 In a non-pie executable even when there are
3965 no plt calls. */
3966 if (!info->shared
3967 || is_branch_reloc (r_type))
3968 {
3969 bfd_vma addend = 0;
3970 if (r_type == R_PPC_PLTREL24)
3971 {
3972 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3973 if (info->shared)
3974 addend = rel->r_addend;
3975 }
3976 if (!update_plt_info (abfd, ifunc, got2, addend))
3977 return FALSE;
3978 }
3979 }
3980 }
3981
3982 if (!htab->is_vxworks
3983 && is_branch_reloc (r_type)
3984 && h != NULL
3985 && h == tga)
3986 {
3987 if (rel != relocs
3988 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3989 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3990 /* We have a new-style __tls_get_addr call with a marker
3991 reloc. */
3992 ;
3993 else
3994 /* Mark this section as having an old-style call. */
3995 sec->has_tls_get_addr_call = 1;
3996 }
3997
3998 switch (r_type)
3999 {
4000 case R_PPC_TLSGD:
4001 case R_PPC_TLSLD:
4002 /* These special tls relocs tie a call to __tls_get_addr with
4003 its parameter symbol. */
4004 break;
4005
4006 case R_PPC_GOT_TLSLD16:
4007 case R_PPC_GOT_TLSLD16_LO:
4008 case R_PPC_GOT_TLSLD16_HI:
4009 case R_PPC_GOT_TLSLD16_HA:
4010 tls_type = TLS_TLS | TLS_LD;
4011 goto dogottls;
4012
4013 case R_PPC_GOT_TLSGD16:
4014 case R_PPC_GOT_TLSGD16_LO:
4015 case R_PPC_GOT_TLSGD16_HI:
4016 case R_PPC_GOT_TLSGD16_HA:
4017 tls_type = TLS_TLS | TLS_GD;
4018 goto dogottls;
4019
4020 case R_PPC_GOT_TPREL16:
4021 case R_PPC_GOT_TPREL16_LO:
4022 case R_PPC_GOT_TPREL16_HI:
4023 case R_PPC_GOT_TPREL16_HA:
4024 if (!info->executable)
4025 info->flags |= DF_STATIC_TLS;
4026 tls_type = TLS_TLS | TLS_TPREL;
4027 goto dogottls;
4028
4029 case R_PPC_GOT_DTPREL16:
4030 case R_PPC_GOT_DTPREL16_LO:
4031 case R_PPC_GOT_DTPREL16_HI:
4032 case R_PPC_GOT_DTPREL16_HA:
4033 tls_type = TLS_TLS | TLS_DTPREL;
4034 dogottls:
4035 sec->has_tls_reloc = 1;
4036 /* Fall thru */
4037
4038 /* GOT16 relocations */
4039 case R_PPC_GOT16:
4040 case R_PPC_GOT16_LO:
4041 case R_PPC_GOT16_HI:
4042 case R_PPC_GOT16_HA:
4043 /* This symbol requires a global offset table entry. */
4044 if (htab->got == NULL)
4045 {
4046 if (htab->elf.dynobj == NULL)
4047 htab->elf.dynobj = abfd;
4048 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4049 return FALSE;
4050 }
4051 if (h != NULL)
4052 {
4053 h->got.refcount += 1;
4054 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4055 }
4056 else
4057 /* This is a global offset table entry for a local symbol. */
4058 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4059 return FALSE;
4060
4061 /* We may also need a plt entry if the symbol turns out to be
4062 an ifunc. */
4063 if (h != NULL && !info->shared)
4064 {
4065 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4066 return FALSE;
4067 }
4068 break;
4069
4070 /* Indirect .sdata relocation. */
4071 case R_PPC_EMB_SDAI16:
4072 if (info->shared)
4073 {
4074 bad_shared_reloc (abfd, r_type);
4075 return FALSE;
4076 }
4077 if (htab->sdata[0].section == NULL
4078 && !ppc_elf_create_linker_section (abfd, info, 0,
4079 &htab->sdata[0]))
4080 return FALSE;
4081 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
4082 h, rel))
4083 return FALSE;
4084 if (h != NULL)
4085 {
4086 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4087 h->non_got_ref = TRUE;
4088 }
4089 break;
4090
4091 /* Indirect .sdata2 relocation. */
4092 case R_PPC_EMB_SDA2I16:
4093 if (info->shared)
4094 {
4095 bad_shared_reloc (abfd, r_type);
4096 return FALSE;
4097 }
4098 if (htab->sdata[1].section == NULL
4099 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
4100 &htab->sdata[1]))
4101 return FALSE;
4102 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
4103 h, rel))
4104 return FALSE;
4105 if (h != NULL)
4106 {
4107 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4108 h->non_got_ref = TRUE;
4109 }
4110 break;
4111
4112 case R_PPC_VLE_SDAREL_LO16A:
4113 case R_PPC_VLE_SDAREL_LO16D:
4114 case R_PPC_VLE_SDAREL_HI16A:
4115 case R_PPC_VLE_SDAREL_HI16D:
4116 case R_PPC_VLE_SDAREL_HA16A:
4117 case R_PPC_VLE_SDAREL_HA16D:
4118 case R_PPC_SDAREL16:
4119 if (htab->sdata[0].sym == NULL
4120 && !create_sdata_sym (info, &htab->sdata[0]))
4121 return FALSE;
4122
4123 if (htab->sdata[1].sym == NULL
4124 && !create_sdata_sym (info, &htab->sdata[1]))
4125 return FALSE;
4126
4127 if (h != NULL)
4128 {
4129 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4130 h->non_got_ref = TRUE;
4131 }
4132 break;
4133
4134 case R_PPC_VLE_REL8:
4135 case R_PPC_VLE_REL15:
4136 case R_PPC_VLE_REL24:
4137 case R_PPC_VLE_LO16A:
4138 case R_PPC_VLE_LO16D:
4139 case R_PPC_VLE_HI16A:
4140 case R_PPC_VLE_HI16D:
4141 case R_PPC_VLE_HA16A:
4142 case R_PPC_VLE_HA16D:
4143 break;
4144
4145 case R_PPC_EMB_SDA2REL:
4146 if (info->shared)
4147 {
4148 bad_shared_reloc (abfd, r_type);
4149 return FALSE;
4150 }
4151 if (htab->sdata[1].sym == NULL
4152 && !create_sdata_sym (info, &htab->sdata[1]))
4153 return FALSE;
4154 if (h != NULL)
4155 {
4156 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4157 h->non_got_ref = TRUE;
4158 }
4159 break;
4160
4161 case R_PPC_VLE_SDA21_LO:
4162 case R_PPC_VLE_SDA21:
4163 case R_PPC_EMB_SDA21:
4164 case R_PPC_EMB_RELSDA:
4165 if (info->shared)
4166 {
4167 bad_shared_reloc (abfd, r_type);
4168 return FALSE;
4169 }
4170 if (htab->sdata[0].sym == NULL
4171 && !create_sdata_sym (info, &htab->sdata[0]))
4172 return FALSE;
4173 if (htab->sdata[1].sym == NULL
4174 && !create_sdata_sym (info, &htab->sdata[1]))
4175 return FALSE;
4176 if (h != NULL)
4177 {
4178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4179 h->non_got_ref = TRUE;
4180 }
4181 break;
4182
4183 case R_PPC_EMB_NADDR32:
4184 case R_PPC_EMB_NADDR16:
4185 case R_PPC_EMB_NADDR16_LO:
4186 case R_PPC_EMB_NADDR16_HI:
4187 case R_PPC_EMB_NADDR16_HA:
4188 if (info->shared)
4189 {
4190 bad_shared_reloc (abfd, r_type);
4191 return FALSE;
4192 }
4193 if (h != NULL)
4194 h->non_got_ref = TRUE;
4195 break;
4196
4197 case R_PPC_PLTREL24:
4198 if (h == NULL)
4199 break;
4200 /* Fall through */
4201 case R_PPC_PLT32:
4202 case R_PPC_PLTREL32:
4203 case R_PPC_PLT16_LO:
4204 case R_PPC_PLT16_HI:
4205 case R_PPC_PLT16_HA:
4206 #ifdef DEBUG
4207 fprintf (stderr, "Reloc requires a PLT entry\n");
4208 #endif
4209 /* This symbol requires a procedure linkage table entry. We
4210 actually build the entry in finish_dynamic_symbol,
4211 because this might be a case of linking PIC code without
4212 linking in any dynamic objects, in which case we don't
4213 need to generate a procedure linkage table after all. */
4214
4215 if (h == NULL)
4216 {
4217 /* It does not make sense to have a procedure linkage
4218 table entry for a local symbol. */
4219 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4220 abfd, sec, rel->r_offset,
4221 ppc_elf_howto_table[r_type]->name);
4222 bfd_set_error (bfd_error_bad_value);
4223 return FALSE;
4224 }
4225 else
4226 {
4227 bfd_vma addend = 0;
4228
4229 if (r_type == R_PPC_PLTREL24)
4230 {
4231 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4232 if (info->shared)
4233 addend = rel->r_addend;
4234 }
4235 h->needs_plt = 1;
4236 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4237 return FALSE;
4238 }
4239 break;
4240
4241 /* The following relocations don't need to propagate the
4242 relocation if linking a shared object since they are
4243 section relative. */
4244 case R_PPC_SECTOFF:
4245 case R_PPC_SECTOFF_LO:
4246 case R_PPC_SECTOFF_HI:
4247 case R_PPC_SECTOFF_HA:
4248 case R_PPC_DTPREL16:
4249 case R_PPC_DTPREL16_LO:
4250 case R_PPC_DTPREL16_HI:
4251 case R_PPC_DTPREL16_HA:
4252 case R_PPC_TOC16:
4253 break;
4254
4255 case R_PPC_REL16:
4256 case R_PPC_REL16_LO:
4257 case R_PPC_REL16_HI:
4258 case R_PPC_REL16_HA:
4259 ppc_elf_tdata (abfd)->has_rel16 = 1;
4260 break;
4261
4262 /* These are just markers. */
4263 case R_PPC_TLS:
4264 case R_PPC_EMB_MRKREF:
4265 case R_PPC_NONE:
4266 case R_PPC_max:
4267 case R_PPC_RELAX:
4268 case R_PPC_RELAX_PLT:
4269 case R_PPC_RELAX_PLTREL24:
4270 break;
4271
4272 /* These should only appear in dynamic objects. */
4273 case R_PPC_COPY:
4274 case R_PPC_GLOB_DAT:
4275 case R_PPC_JMP_SLOT:
4276 case R_PPC_RELATIVE:
4277 case R_PPC_IRELATIVE:
4278 break;
4279
4280 /* These aren't handled yet. We'll report an error later. */
4281 case R_PPC_ADDR30:
4282 case R_PPC_EMB_RELSEC16:
4283 case R_PPC_EMB_RELST_LO:
4284 case R_PPC_EMB_RELST_HI:
4285 case R_PPC_EMB_RELST_HA:
4286 case R_PPC_EMB_BIT_FLD:
4287 break;
4288
4289 /* This refers only to functions defined in the shared library. */
4290 case R_PPC_LOCAL24PC:
4291 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4292 {
4293 htab->plt_type = PLT_OLD;
4294 htab->old_bfd = abfd;
4295 }
4296 if (h != NULL && h->type == STT_GNU_IFUNC)
4297 {
4298 if (info->shared)
4299 {
4300 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4301 abfd, sec, rel->r_offset,
4302 h->root.root.string);
4303 bfd_set_error (bfd_error_bad_value);
4304 return FALSE;
4305 }
4306 h->needs_plt = 1;
4307 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4308 return FALSE;
4309 }
4310 break;
4311
4312 /* This relocation describes the C++ object vtable hierarchy.
4313 Reconstruct it for later use during GC. */
4314 case R_PPC_GNU_VTINHERIT:
4315 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4316 return FALSE;
4317 break;
4318
4319 /* This relocation describes which C++ vtable entries are actually
4320 used. Record for later use during GC. */
4321 case R_PPC_GNU_VTENTRY:
4322 BFD_ASSERT (h != NULL);
4323 if (h != NULL
4324 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4325 return FALSE;
4326 break;
4327
4328 /* We shouldn't really be seeing these. */
4329 case R_PPC_TPREL32:
4330 case R_PPC_TPREL16:
4331 case R_PPC_TPREL16_LO:
4332 case R_PPC_TPREL16_HI:
4333 case R_PPC_TPREL16_HA:
4334 if (!info->executable)
4335 info->flags |= DF_STATIC_TLS;
4336 goto dodyn;
4337
4338 /* Nor these. */
4339 case R_PPC_DTPMOD32:
4340 case R_PPC_DTPREL32:
4341 goto dodyn;
4342
4343 case R_PPC_REL32:
4344 if (h == NULL
4345 && got2 != NULL
4346 && (sec->flags & SEC_CODE) != 0
4347 && info->shared
4348 && htab->plt_type == PLT_UNSET)
4349 {
4350 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4351 the start of a function, which assembles to a REL32
4352 reference to .got2. If we detect one of these, then
4353 force the old PLT layout because the linker cannot
4354 reliably deduce the GOT pointer value needed for
4355 PLT call stubs. */
4356 asection *s;
4357 Elf_Internal_Sym *isym;
4358
4359 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4360 abfd, r_symndx);
4361 if (isym == NULL)
4362 return FALSE;
4363
4364 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4365 if (s == got2)
4366 {
4367 htab->plt_type = PLT_OLD;
4368 htab->old_bfd = abfd;
4369 }
4370 }
4371 if (h == NULL || h == htab->elf.hgot)
4372 break;
4373 /* fall through */
4374
4375 case R_PPC_ADDR32:
4376 case R_PPC_ADDR16:
4377 case R_PPC_ADDR16_LO:
4378 case R_PPC_ADDR16_HI:
4379 case R_PPC_ADDR16_HA:
4380 case R_PPC_UADDR32:
4381 case R_PPC_UADDR16:
4382 if (h != NULL && !info->shared)
4383 {
4384 /* We may need a plt entry if the symbol turns out to be
4385 a function defined in a dynamic object. */
4386 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4387 return FALSE;
4388
4389 /* We may need a copy reloc too. */
4390 h->non_got_ref = 1;
4391 h->pointer_equality_needed = 1;
4392 }
4393 goto dodyn;
4394
4395 case R_PPC_REL24:
4396 case R_PPC_REL14:
4397 case R_PPC_REL14_BRTAKEN:
4398 case R_PPC_REL14_BRNTAKEN:
4399 if (h == NULL)
4400 break;
4401 if (h == htab->elf.hgot)
4402 {
4403 if (htab->plt_type == PLT_UNSET)
4404 {
4405 htab->plt_type = PLT_OLD;
4406 htab->old_bfd = abfd;
4407 }
4408 break;
4409 }
4410 /* fall through */
4411
4412 case R_PPC_ADDR24:
4413 case R_PPC_ADDR14:
4414 case R_PPC_ADDR14_BRTAKEN:
4415 case R_PPC_ADDR14_BRNTAKEN:
4416 if (h != NULL && !info->shared)
4417 {
4418 /* We may need a plt entry if the symbol turns out to be
4419 a function defined in a dynamic object. */
4420 h->needs_plt = 1;
4421 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4422 return FALSE;
4423 break;
4424 }
4425
4426 dodyn:
4427 /* If we are creating a shared library, and this is a reloc
4428 against a global symbol, or a non PC relative reloc
4429 against a local symbol, then we need to copy the reloc
4430 into the shared library. However, if we are linking with
4431 -Bsymbolic, we do not need to copy a reloc against a
4432 global symbol which is defined in an object we are
4433 including in the link (i.e., DEF_REGULAR is set). At
4434 this point we have not seen all the input files, so it is
4435 possible that DEF_REGULAR is not set now but will be set
4436 later (it is never cleared). In case of a weak definition,
4437 DEF_REGULAR may be cleared later by a strong definition in
4438 a shared library. We account for that possibility below by
4439 storing information in the dyn_relocs field of the hash
4440 table entry. A similar situation occurs when creating
4441 shared libraries and symbol visibility changes render the
4442 symbol local.
4443
4444 If on the other hand, we are creating an executable, we
4445 may need to keep relocations for symbols satisfied by a
4446 dynamic library if we manage to avoid copy relocs for the
4447 symbol. */
4448 if ((info->shared
4449 && (must_be_dyn_reloc (info, r_type)
4450 || (h != NULL
4451 && (!SYMBOLIC_BIND (info, h)
4452 || h->root.type == bfd_link_hash_defweak
4453 || !h->def_regular))))
4454 || (ELIMINATE_COPY_RELOCS
4455 && !info->shared
4456 && h != NULL
4457 && (h->root.type == bfd_link_hash_defweak
4458 || !h->def_regular)))
4459 {
4460 #ifdef DEBUG
4461 fprintf (stderr,
4462 "ppc_elf_check_relocs needs to "
4463 "create relocation for %s\n",
4464 (h && h->root.root.string
4465 ? h->root.root.string : "<unknown>"));
4466 #endif
4467 if (sreloc == NULL)
4468 {
4469 if (htab->elf.dynobj == NULL)
4470 htab->elf.dynobj = abfd;
4471
4472 sreloc = _bfd_elf_make_dynamic_reloc_section
4473 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4474
4475 if (sreloc == NULL)
4476 return FALSE;
4477 }
4478
4479 /* If this is a global symbol, we count the number of
4480 relocations we need for this symbol. */
4481 if (h != NULL)
4482 {
4483 struct elf_dyn_relocs *p;
4484 struct elf_dyn_relocs **rel_head;
4485
4486 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4487 p = *rel_head;
4488 if (p == NULL || p->sec != sec)
4489 {
4490 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4491 if (p == NULL)
4492 return FALSE;
4493 p->next = *rel_head;
4494 *rel_head = p;
4495 p->sec = sec;
4496 p->count = 0;
4497 p->pc_count = 0;
4498 }
4499 p->count += 1;
4500 if (!must_be_dyn_reloc (info, r_type))
4501 p->pc_count += 1;
4502 }
4503 else
4504 {
4505 /* Track dynamic relocs needed for local syms too.
4506 We really need local syms available to do this
4507 easily. Oh well. */
4508 struct ppc_dyn_relocs *p;
4509 struct ppc_dyn_relocs **rel_head;
4510 bfd_boolean is_ifunc;
4511 asection *s;
4512 void *vpp;
4513 Elf_Internal_Sym *isym;
4514
4515 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4516 abfd, r_symndx);
4517 if (isym == NULL)
4518 return FALSE;
4519
4520 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4521 if (s == NULL)
4522 s = sec;
4523
4524 vpp = &elf_section_data (s)->local_dynrel;
4525 rel_head = (struct ppc_dyn_relocs **) vpp;
4526 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4527 p = *rel_head;
4528 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4529 p = p->next;
4530 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4531 {
4532 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4533 if (p == NULL)
4534 return FALSE;
4535 p->next = *rel_head;
4536 *rel_head = p;
4537 p->sec = sec;
4538 p->ifunc = is_ifunc;
4539 p->count = 0;
4540 }
4541 p->count += 1;
4542 }
4543 }
4544
4545 break;
4546 }
4547 }
4548
4549 return TRUE;
4550 }
4551 \f
4552
4553 /* Merge object attributes from IBFD into OBFD. Raise an error if
4554 there are conflicting attributes. */
4555 static bfd_boolean
4556 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4557 {
4558 obj_attribute *in_attr, *in_attrs;
4559 obj_attribute *out_attr, *out_attrs;
4560
4561 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4562 {
4563 /* This is the first object. Copy the attributes. */
4564 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4565
4566 /* Use the Tag_null value to indicate the attributes have been
4567 initialized. */
4568 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4569
4570 return TRUE;
4571 }
4572
4573 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4574 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4575
4576 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4577 non-conflicting ones. */
4578 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4579 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4580 if (in_attr->i != out_attr->i)
4581 {
4582 out_attr->type = 1;
4583 if (out_attr->i == 0)
4584 out_attr->i = in_attr->i;
4585 else if (in_attr->i == 0)
4586 ;
4587 else if (out_attr->i == 1 && in_attr->i == 2)
4588 _bfd_error_handler
4589 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4590 else if (out_attr->i == 1 && in_attr->i == 3)
4591 _bfd_error_handler
4592 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4593 obfd, ibfd);
4594 else if (out_attr->i == 3 && in_attr->i == 1)
4595 _bfd_error_handler
4596 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4597 ibfd, obfd);
4598 else if (out_attr->i == 3 && in_attr->i == 2)
4599 _bfd_error_handler
4600 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4601 ibfd, obfd);
4602 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4603 _bfd_error_handler
4604 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4605 else if (in_attr->i > 3)
4606 _bfd_error_handler
4607 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4608 in_attr->i);
4609 else
4610 _bfd_error_handler
4611 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4612 out_attr->i);
4613 }
4614
4615 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4616 merge non-conflicting ones. */
4617 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4618 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4619 if (in_attr->i != out_attr->i)
4620 {
4621 const char *in_abi = NULL, *out_abi = NULL;
4622
4623 switch (in_attr->i)
4624 {
4625 case 1: in_abi = "generic"; break;
4626 case 2: in_abi = "AltiVec"; break;
4627 case 3: in_abi = "SPE"; break;
4628 }
4629
4630 switch (out_attr->i)
4631 {
4632 case 1: out_abi = "generic"; break;
4633 case 2: out_abi = "AltiVec"; break;
4634 case 3: out_abi = "SPE"; break;
4635 }
4636
4637 out_attr->type = 1;
4638 if (out_attr->i == 0)
4639 out_attr->i = in_attr->i;
4640 else if (in_attr->i == 0)
4641 ;
4642 /* For now, allow generic to transition to AltiVec or SPE
4643 without a warning. If GCC marked files with their stack
4644 alignment and used don't-care markings for files which are
4645 not affected by the vector ABI, we could warn about this
4646 case too. */
4647 else if (out_attr->i == 1)
4648 out_attr->i = in_attr->i;
4649 else if (in_attr->i == 1)
4650 ;
4651 else if (in_abi == NULL)
4652 _bfd_error_handler
4653 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4654 in_attr->i);
4655 else if (out_abi == NULL)
4656 _bfd_error_handler
4657 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4658 in_attr->i);
4659 else
4660 _bfd_error_handler
4661 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4662 ibfd, obfd, in_abi, out_abi);
4663 }
4664
4665 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4666 and merge non-conflicting ones. */
4667 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4668 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4669 if (in_attr->i != out_attr->i)
4670 {
4671 out_attr->type = 1;
4672 if (out_attr->i == 0)
4673 out_attr->i = in_attr->i;
4674 else if (in_attr->i == 0)
4675 ;
4676 else if (out_attr->i == 1 && in_attr->i == 2)
4677 _bfd_error_handler
4678 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4679 else if (out_attr->i == 2 && in_attr->i == 1)
4680 _bfd_error_handler
4681 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4682 else if (in_attr->i > 2)
4683 _bfd_error_handler
4684 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4685 in_attr->i);
4686 else
4687 _bfd_error_handler
4688 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4689 out_attr->i);
4690 }
4691
4692 /* Merge Tag_compatibility attributes and any common GNU ones. */
4693 _bfd_elf_merge_object_attributes (ibfd, obfd);
4694
4695 return TRUE;
4696 }
4697
4698 /* Merge backend specific data from an object file to the output
4699 object file when linking. */
4700
4701 static bfd_boolean
4702 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4703 {
4704 flagword old_flags;
4705 flagword new_flags;
4706 bfd_boolean error;
4707
4708 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4709 return TRUE;
4710
4711 /* Check if we have the same endianness. */
4712 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4713 return FALSE;
4714
4715 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4716 return FALSE;
4717
4718 new_flags = elf_elfheader (ibfd)->e_flags;
4719 old_flags = elf_elfheader (obfd)->e_flags;
4720 if (!elf_flags_init (obfd))
4721 {
4722 /* First call, no flags set. */
4723 elf_flags_init (obfd) = TRUE;
4724 elf_elfheader (obfd)->e_flags = new_flags;
4725 }
4726
4727 /* Compatible flags are ok. */
4728 else if (new_flags == old_flags)
4729 ;
4730
4731 /* Incompatible flags. */
4732 else
4733 {
4734 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4735 to be linked with either. */
4736 error = FALSE;
4737 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4738 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4739 {
4740 error = TRUE;
4741 (*_bfd_error_handler)
4742 (_("%B: compiled with -mrelocatable and linked with "
4743 "modules compiled normally"), ibfd);
4744 }
4745 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4746 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4747 {
4748 error = TRUE;
4749 (*_bfd_error_handler)
4750 (_("%B: compiled normally and linked with "
4751 "modules compiled with -mrelocatable"), ibfd);
4752 }
4753
4754 /* The output is -mrelocatable-lib iff both the input files are. */
4755 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4756 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4757
4758 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4759 but each input file is either -mrelocatable or -mrelocatable-lib. */
4760 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4761 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4762 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4763 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4764
4765 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4766 any module uses it. */
4767 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4768
4769 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4770 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4771
4772 /* Warn about any other mismatches. */
4773 if (new_flags != old_flags)
4774 {
4775 error = TRUE;
4776 (*_bfd_error_handler)
4777 (_("%B: uses different e_flags (0x%lx) fields "
4778 "than previous modules (0x%lx)"),
4779 ibfd, (long) new_flags, (long) old_flags);
4780 }
4781
4782 if (error)
4783 {
4784 bfd_set_error (bfd_error_bad_value);
4785 return FALSE;
4786 }
4787 }
4788
4789 return TRUE;
4790 }
4791
4792 static void
4793 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4794 bfd_vma value,
4795 split16_format_type split16_format)
4796
4797 {
4798 unsigned int insn, top5;
4799
4800 insn = bfd_get_32 (output_bfd, loc);
4801 top5 = value & 0xf800;
4802 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4803 insn |= top5;
4804 insn |= value & 0x7ff;
4805 bfd_put_32 (output_bfd, insn, loc);
4806 }
4807
4808 \f
4809 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4810 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4811 int
4812 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4813 struct bfd_link_info *info)
4814 {
4815 struct ppc_elf_link_hash_table *htab;
4816 flagword flags;
4817
4818 htab = ppc_elf_hash_table (info);
4819
4820 if (htab->plt_type == PLT_UNSET)
4821 {
4822 struct elf_link_hash_entry *h;
4823
4824 if (htab->params->plt_style == PLT_OLD)
4825 htab->plt_type = PLT_OLD;
4826 else if (info->shared
4827 && htab->elf.dynamic_sections_created
4828 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4829 FALSE, FALSE, TRUE)) != NULL
4830 && (h->type == STT_FUNC
4831 || h->needs_plt)
4832 && h->ref_regular
4833 && !(SYMBOL_CALLS_LOCAL (info, h)
4834 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4835 && h->root.type == bfd_link_hash_undefweak)))
4836 {
4837 /* Profiling of shared libs (and pies) is not supported with
4838 secure plt, because ppc32 does profiling before a
4839 function prologue and a secure plt pic call stubs needs
4840 r30 to be set up. */
4841 htab->plt_type = PLT_OLD;
4842 }
4843 else
4844 {
4845 bfd *ibfd;
4846 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4847
4848 /* Look through the reloc flags left by ppc_elf_check_relocs.
4849 Use the old style bss plt if a file makes plt calls
4850 without using the new relocs, and if ld isn't given
4851 --secure-plt and we never see REL16 relocs. */
4852 if (plt_type == PLT_UNSET)
4853 plt_type = PLT_OLD;
4854 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4855 if (is_ppc_elf (ibfd))
4856 {
4857 if (ppc_elf_tdata (ibfd)->has_rel16)
4858 plt_type = PLT_NEW;
4859 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4860 {
4861 plt_type = PLT_OLD;
4862 htab->old_bfd = ibfd;
4863 break;
4864 }
4865 }
4866 htab->plt_type = plt_type;
4867 }
4868 }
4869 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4870 {
4871 if (htab->old_bfd != NULL)
4872 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4873 htab->old_bfd);
4874 else
4875 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4876 }
4877
4878 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4879
4880 if (htab->plt_type == PLT_NEW)
4881 {
4882 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4883 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4884
4885 /* The new PLT is a loaded section. */
4886 if (htab->plt != NULL
4887 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4888 return -1;
4889
4890 /* The new GOT is not executable. */
4891 if (htab->got != NULL
4892 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4893 return -1;
4894 }
4895 else
4896 {
4897 /* Stop an unused .glink section from affecting .text alignment. */
4898 if (htab->glink != NULL
4899 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4900 return -1;
4901 }
4902 return htab->plt_type == PLT_NEW;
4903 }
4904 \f
4905 /* Return the section that should be marked against GC for a given
4906 relocation. */
4907
4908 static asection *
4909 ppc_elf_gc_mark_hook (asection *sec,
4910 struct bfd_link_info *info,
4911 Elf_Internal_Rela *rel,
4912 struct elf_link_hash_entry *h,
4913 Elf_Internal_Sym *sym)
4914 {
4915 if (h != NULL)
4916 switch (ELF32_R_TYPE (rel->r_info))
4917 {
4918 case R_PPC_GNU_VTINHERIT:
4919 case R_PPC_GNU_VTENTRY:
4920 return NULL;
4921 }
4922
4923 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4924 }
4925
4926 /* Update the got, plt and dynamic reloc reference counts for the
4927 section being removed. */
4928
4929 static bfd_boolean
4930 ppc_elf_gc_sweep_hook (bfd *abfd,
4931 struct bfd_link_info *info,
4932 asection *sec,
4933 const Elf_Internal_Rela *relocs)
4934 {
4935 struct ppc_elf_link_hash_table *htab;
4936 Elf_Internal_Shdr *symtab_hdr;
4937 struct elf_link_hash_entry **sym_hashes;
4938 bfd_signed_vma *local_got_refcounts;
4939 const Elf_Internal_Rela *rel, *relend;
4940 asection *got2;
4941
4942 if (info->relocatable)
4943 return TRUE;
4944
4945 if ((sec->flags & SEC_ALLOC) == 0)
4946 return TRUE;
4947
4948 elf_section_data (sec)->local_dynrel = NULL;
4949
4950 htab = ppc_elf_hash_table (info);
4951 symtab_hdr = &elf_symtab_hdr (abfd);
4952 sym_hashes = elf_sym_hashes (abfd);
4953 local_got_refcounts = elf_local_got_refcounts (abfd);
4954 got2 = bfd_get_section_by_name (abfd, ".got2");
4955
4956 relend = relocs + sec->reloc_count;
4957 for (rel = relocs; rel < relend; rel++)
4958 {
4959 unsigned long r_symndx;
4960 enum elf_ppc_reloc_type r_type;
4961 struct elf_link_hash_entry *h = NULL;
4962
4963 r_symndx = ELF32_R_SYM (rel->r_info);
4964 if (r_symndx >= symtab_hdr->sh_info)
4965 {
4966 struct elf_dyn_relocs **pp, *p;
4967 struct ppc_elf_link_hash_entry *eh;
4968
4969 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4970 while (h->root.type == bfd_link_hash_indirect
4971 || h->root.type == bfd_link_hash_warning)
4972 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4973 eh = (struct ppc_elf_link_hash_entry *) h;
4974
4975 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4976 if (p->sec == sec)
4977 {
4978 /* Everything must go for SEC. */
4979 *pp = p->next;
4980 break;
4981 }
4982 }
4983
4984 r_type = ELF32_R_TYPE (rel->r_info);
4985 if (!htab->is_vxworks
4986 && h == NULL
4987 && local_got_refcounts != NULL
4988 && (!info->shared
4989 || is_branch_reloc (r_type)))
4990 {
4991 struct plt_entry **local_plt = (struct plt_entry **)
4992 (local_got_refcounts + symtab_hdr->sh_info);
4993 char *local_got_tls_masks = (char *)
4994 (local_plt + symtab_hdr->sh_info);
4995 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4996 {
4997 struct plt_entry **ifunc = local_plt + r_symndx;
4998 bfd_vma addend = 0;
4999 struct plt_entry *ent;
5000
5001 if (r_type == R_PPC_PLTREL24 && info->shared)
5002 addend = rel->r_addend;
5003 ent = find_plt_ent (ifunc, got2, addend);
5004 if (ent->plt.refcount > 0)
5005 ent->plt.refcount -= 1;
5006 continue;
5007 }
5008 }
5009
5010 switch (r_type)
5011 {
5012 case R_PPC_GOT_TLSLD16:
5013 case R_PPC_GOT_TLSLD16_LO:
5014 case R_PPC_GOT_TLSLD16_HI:
5015 case R_PPC_GOT_TLSLD16_HA:
5016 case R_PPC_GOT_TLSGD16:
5017 case R_PPC_GOT_TLSGD16_LO:
5018 case R_PPC_GOT_TLSGD16_HI:
5019 case R_PPC_GOT_TLSGD16_HA:
5020 case R_PPC_GOT_TPREL16:
5021 case R_PPC_GOT_TPREL16_LO:
5022 case R_PPC_GOT_TPREL16_HI:
5023 case R_PPC_GOT_TPREL16_HA:
5024 case R_PPC_GOT_DTPREL16:
5025 case R_PPC_GOT_DTPREL16_LO:
5026 case R_PPC_GOT_DTPREL16_HI:
5027 case R_PPC_GOT_DTPREL16_HA:
5028 case R_PPC_GOT16:
5029 case R_PPC_GOT16_LO:
5030 case R_PPC_GOT16_HI:
5031 case R_PPC_GOT16_HA:
5032 if (h != NULL)
5033 {
5034 if (h->got.refcount > 0)
5035 h->got.refcount--;
5036 if (!info->shared)
5037 {
5038 struct plt_entry *ent;
5039
5040 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5041 if (ent != NULL && ent->plt.refcount > 0)
5042 ent->plt.refcount -= 1;
5043 }
5044 }
5045 else if (local_got_refcounts != NULL)
5046 {
5047 if (local_got_refcounts[r_symndx] > 0)
5048 local_got_refcounts[r_symndx]--;
5049 }
5050 break;
5051
5052 case R_PPC_REL24:
5053 case R_PPC_REL14:
5054 case R_PPC_REL14_BRTAKEN:
5055 case R_PPC_REL14_BRNTAKEN:
5056 case R_PPC_REL32:
5057 if (h == NULL || h == htab->elf.hgot)
5058 break;
5059 /* Fall thru */
5060
5061 case R_PPC_ADDR32:
5062 case R_PPC_ADDR24:
5063 case R_PPC_ADDR16:
5064 case R_PPC_ADDR16_LO:
5065 case R_PPC_ADDR16_HI:
5066 case R_PPC_ADDR16_HA:
5067 case R_PPC_ADDR14:
5068 case R_PPC_ADDR14_BRTAKEN:
5069 case R_PPC_ADDR14_BRNTAKEN:
5070 case R_PPC_UADDR32:
5071 case R_PPC_UADDR16:
5072 if (info->shared)
5073 break;
5074
5075 case R_PPC_PLT32:
5076 case R_PPC_PLTREL24:
5077 case R_PPC_PLTREL32:
5078 case R_PPC_PLT16_LO:
5079 case R_PPC_PLT16_HI:
5080 case R_PPC_PLT16_HA:
5081 if (h != NULL)
5082 {
5083 bfd_vma addend = 0;
5084 struct plt_entry *ent;
5085
5086 if (r_type == R_PPC_PLTREL24 && info->shared)
5087 addend = rel->r_addend;
5088 ent = find_plt_ent (&h->plt.plist, got2, addend);
5089 if (ent != NULL && ent->plt.refcount > 0)
5090 ent->plt.refcount -= 1;
5091 }
5092 break;
5093
5094 default:
5095 break;
5096 }
5097 }
5098 return TRUE;
5099 }
5100 \f
5101 /* Set plt output section type, htab->tls_get_addr, and call the
5102 generic ELF tls_setup function. */
5103
5104 asection *
5105 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5106 {
5107 struct ppc_elf_link_hash_table *htab;
5108
5109 htab = ppc_elf_hash_table (info);
5110 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5111 FALSE, FALSE, TRUE);
5112 if (!htab->params->no_tls_get_addr_opt)
5113 {
5114 struct elf_link_hash_entry *opt, *tga;
5115 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5116 FALSE, FALSE, TRUE);
5117 if (opt != NULL
5118 && (opt->root.type == bfd_link_hash_defined
5119 || opt->root.type == bfd_link_hash_defweak))
5120 {
5121 /* If glibc supports an optimized __tls_get_addr call stub,
5122 signalled by the presence of __tls_get_addr_opt, and we'll
5123 be calling __tls_get_addr via a plt call stub, then
5124 make __tls_get_addr point to __tls_get_addr_opt. */
5125 tga = htab->tls_get_addr;
5126 if (htab->elf.dynamic_sections_created
5127 && tga != NULL
5128 && (tga->type == STT_FUNC
5129 || tga->needs_plt)
5130 && !(SYMBOL_CALLS_LOCAL (info, tga)
5131 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5132 && tga->root.type == bfd_link_hash_undefweak)))
5133 {
5134 struct plt_entry *ent;
5135 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5136 if (ent->plt.refcount > 0)
5137 break;
5138 if (ent != NULL)
5139 {
5140 tga->root.type = bfd_link_hash_indirect;
5141 tga->root.u.i.link = &opt->root;
5142 ppc_elf_copy_indirect_symbol (info, opt, tga);
5143 if (opt->dynindx != -1)
5144 {
5145 /* Use __tls_get_addr_opt in dynamic relocations. */
5146 opt->dynindx = -1;
5147 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5148 opt->dynstr_index);
5149 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5150 return FALSE;
5151 }
5152 htab->tls_get_addr = opt;
5153 }
5154 }
5155 }
5156 else
5157 htab->params->no_tls_get_addr_opt = TRUE;
5158 }
5159 if (htab->plt_type == PLT_NEW
5160 && htab->plt != NULL
5161 && htab->plt->output_section != NULL)
5162 {
5163 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5164 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5165 }
5166
5167 return _bfd_elf_tls_setup (obfd, info);
5168 }
5169
5170 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5171 HASH. */
5172
5173 static bfd_boolean
5174 branch_reloc_hash_match (const bfd *ibfd,
5175 const Elf_Internal_Rela *rel,
5176 const struct elf_link_hash_entry *hash)
5177 {
5178 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5179 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5180 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5181
5182 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5183 {
5184 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5185 struct elf_link_hash_entry *h;
5186
5187 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5188 while (h->root.type == bfd_link_hash_indirect
5189 || h->root.type == bfd_link_hash_warning)
5190 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5191 if (h == hash)
5192 return TRUE;
5193 }
5194 return FALSE;
5195 }
5196
5197 /* Run through all the TLS relocs looking for optimization
5198 opportunities. */
5199
5200 bfd_boolean
5201 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5202 struct bfd_link_info *info)
5203 {
5204 bfd *ibfd;
5205 asection *sec;
5206 struct ppc_elf_link_hash_table *htab;
5207 int pass;
5208
5209 if (info->relocatable || !info->executable)
5210 return TRUE;
5211
5212 htab = ppc_elf_hash_table (info);
5213 if (htab == NULL)
5214 return FALSE;
5215
5216 /* Make two passes through the relocs. First time check that tls
5217 relocs involved in setting up a tls_get_addr call are indeed
5218 followed by such a call. If they are not, don't do any tls
5219 optimization. On the second pass twiddle tls_mask flags to
5220 notify relocate_section that optimization can be done, and
5221 adjust got and plt refcounts. */
5222 for (pass = 0; pass < 2; ++pass)
5223 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5224 {
5225 Elf_Internal_Sym *locsyms = NULL;
5226 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5227 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5228
5229 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5230 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5231 {
5232 Elf_Internal_Rela *relstart, *rel, *relend;
5233 int expecting_tls_get_addr = 0;
5234
5235 /* Read the relocations. */
5236 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5237 info->keep_memory);
5238 if (relstart == NULL)
5239 return FALSE;
5240
5241 relend = relstart + sec->reloc_count;
5242 for (rel = relstart; rel < relend; rel++)
5243 {
5244 enum elf_ppc_reloc_type r_type;
5245 unsigned long r_symndx;
5246 struct elf_link_hash_entry *h = NULL;
5247 char *tls_mask;
5248 char tls_set, tls_clear;
5249 bfd_boolean is_local;
5250 bfd_signed_vma *got_count;
5251
5252 r_symndx = ELF32_R_SYM (rel->r_info);
5253 if (r_symndx >= symtab_hdr->sh_info)
5254 {
5255 struct elf_link_hash_entry **sym_hashes;
5256
5257 sym_hashes = elf_sym_hashes (ibfd);
5258 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5259 while (h->root.type == bfd_link_hash_indirect
5260 || h->root.type == bfd_link_hash_warning)
5261 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5262 }
5263
5264 is_local = FALSE;
5265 if (h == NULL
5266 || !h->def_dynamic)
5267 is_local = TRUE;
5268
5269 r_type = ELF32_R_TYPE (rel->r_info);
5270 /* If this section has old-style __tls_get_addr calls
5271 without marker relocs, then check that each
5272 __tls_get_addr call reloc is preceded by a reloc
5273 that conceivably belongs to the __tls_get_addr arg
5274 setup insn. If we don't find matching arg setup
5275 relocs, don't do any tls optimization. */
5276 if (pass == 0
5277 && sec->has_tls_get_addr_call
5278 && h != NULL
5279 && h == htab->tls_get_addr
5280 && !expecting_tls_get_addr
5281 && is_branch_reloc (r_type))
5282 {
5283 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5284 "TLS optimization disabled\n",
5285 ibfd, sec, rel->r_offset);
5286 if (elf_section_data (sec)->relocs != relstart)
5287 free (relstart);
5288 return TRUE;
5289 }
5290
5291 expecting_tls_get_addr = 0;
5292 switch (r_type)
5293 {
5294 case R_PPC_GOT_TLSLD16:
5295 case R_PPC_GOT_TLSLD16_LO:
5296 expecting_tls_get_addr = 1;
5297 /* Fall thru */
5298
5299 case R_PPC_GOT_TLSLD16_HI:
5300 case R_PPC_GOT_TLSLD16_HA:
5301 /* These relocs should never be against a symbol
5302 defined in a shared lib. Leave them alone if
5303 that turns out to be the case. */
5304 if (!is_local)
5305 continue;
5306
5307 /* LD -> LE */
5308 tls_set = 0;
5309 tls_clear = TLS_LD;
5310 break;
5311
5312 case R_PPC_GOT_TLSGD16:
5313 case R_PPC_GOT_TLSGD16_LO:
5314 expecting_tls_get_addr = 1;
5315 /* Fall thru */
5316
5317 case R_PPC_GOT_TLSGD16_HI:
5318 case R_PPC_GOT_TLSGD16_HA:
5319 if (is_local)
5320 /* GD -> LE */
5321 tls_set = 0;
5322 else
5323 /* GD -> IE */
5324 tls_set = TLS_TLS | TLS_TPRELGD;
5325 tls_clear = TLS_GD;
5326 break;
5327
5328 case R_PPC_GOT_TPREL16:
5329 case R_PPC_GOT_TPREL16_LO:
5330 case R_PPC_GOT_TPREL16_HI:
5331 case R_PPC_GOT_TPREL16_HA:
5332 if (is_local)
5333 {
5334 /* IE -> LE */
5335 tls_set = 0;
5336 tls_clear = TLS_TPREL;
5337 break;
5338 }
5339 else
5340 continue;
5341
5342 case R_PPC_TLSGD:
5343 case R_PPC_TLSLD:
5344 expecting_tls_get_addr = 2;
5345 tls_set = 0;
5346 tls_clear = 0;
5347 break;
5348
5349 default:
5350 continue;
5351 }
5352
5353 if (pass == 0)
5354 {
5355 if (!expecting_tls_get_addr
5356 || (expecting_tls_get_addr == 1
5357 && !sec->has_tls_get_addr_call))
5358 continue;
5359
5360 if (rel + 1 < relend
5361 && branch_reloc_hash_match (ibfd, rel + 1,
5362 htab->tls_get_addr))
5363 continue;
5364
5365 /* Uh oh, we didn't find the expected call. We
5366 could just mark this symbol to exclude it
5367 from tls optimization but it's safer to skip
5368 the entire optimization. */
5369 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5370 "TLS optimization disabled\n"),
5371 ibfd, sec, rel->r_offset);
5372 if (elf_section_data (sec)->relocs != relstart)
5373 free (relstart);
5374 return TRUE;
5375 }
5376
5377 if (expecting_tls_get_addr)
5378 {
5379 struct plt_entry *ent;
5380 bfd_vma addend = 0;
5381
5382 if (info->shared
5383 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5384 addend = rel[1].r_addend;
5385 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5386 got2, addend);
5387 if (ent != NULL && ent->plt.refcount > 0)
5388 ent->plt.refcount -= 1;
5389
5390 if (expecting_tls_get_addr == 2)
5391 continue;
5392 }
5393
5394 if (h != NULL)
5395 {
5396 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5397 got_count = &h->got.refcount;
5398 }
5399 else
5400 {
5401 bfd_signed_vma *lgot_refs;
5402 struct plt_entry **local_plt;
5403 char *lgot_masks;
5404
5405 if (locsyms == NULL)
5406 {
5407 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5408 if (locsyms == NULL)
5409 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5410 symtab_hdr->sh_info,
5411 0, NULL, NULL, NULL);
5412 if (locsyms == NULL)
5413 {
5414 if (elf_section_data (sec)->relocs != relstart)
5415 free (relstart);
5416 return FALSE;
5417 }
5418 }
5419 lgot_refs = elf_local_got_refcounts (ibfd);
5420 if (lgot_refs == NULL)
5421 abort ();
5422 local_plt = (struct plt_entry **)
5423 (lgot_refs + symtab_hdr->sh_info);
5424 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5425 tls_mask = &lgot_masks[r_symndx];
5426 got_count = &lgot_refs[r_symndx];
5427 }
5428
5429 if (tls_set == 0)
5430 {
5431 /* We managed to get rid of a got entry. */
5432 if (*got_count > 0)
5433 *got_count -= 1;
5434 }
5435
5436 *tls_mask |= tls_set;
5437 *tls_mask &= ~tls_clear;
5438 }
5439
5440 if (elf_section_data (sec)->relocs != relstart)
5441 free (relstart);
5442 }
5443
5444 if (locsyms != NULL
5445 && (symtab_hdr->contents != (unsigned char *) locsyms))
5446 {
5447 if (!info->keep_memory)
5448 free (locsyms);
5449 else
5450 symtab_hdr->contents = (unsigned char *) locsyms;
5451 }
5452 }
5453 return TRUE;
5454 }
5455 \f
5456 /* Return true if we have dynamic relocs that apply to read-only sections. */
5457
5458 static bfd_boolean
5459 readonly_dynrelocs (struct elf_link_hash_entry *h)
5460 {
5461 struct elf_dyn_relocs *p;
5462
5463 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5464 {
5465 asection *s = p->sec->output_section;
5466
5467 if (s != NULL
5468 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5469 == (SEC_READONLY | SEC_ALLOC)))
5470 return TRUE;
5471 }
5472 return FALSE;
5473 }
5474
5475 /* Adjust a symbol defined by a dynamic object and referenced by a
5476 regular object. The current definition is in some section of the
5477 dynamic object, but we're not including those sections. We have to
5478 change the definition to something the rest of the link can
5479 understand. */
5480
5481 static bfd_boolean
5482 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5483 struct elf_link_hash_entry *h)
5484 {
5485 struct ppc_elf_link_hash_table *htab;
5486 asection *s;
5487
5488 #ifdef DEBUG
5489 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5490 h->root.root.string);
5491 #endif
5492
5493 /* Make sure we know what is going on here. */
5494 htab = ppc_elf_hash_table (info);
5495 BFD_ASSERT (htab->elf.dynobj != NULL
5496 && (h->needs_plt
5497 || h->type == STT_GNU_IFUNC
5498 || h->u.weakdef != NULL
5499 || (h->def_dynamic
5500 && h->ref_regular
5501 && !h->def_regular)));
5502
5503 /* Deal with function syms. */
5504 if (h->type == STT_FUNC
5505 || h->type == STT_GNU_IFUNC
5506 || h->needs_plt)
5507 {
5508 /* Clear procedure linkage table information for any symbol that
5509 won't need a .plt entry. */
5510 struct plt_entry *ent;
5511 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5512 if (ent->plt.refcount > 0)
5513 break;
5514 if (ent == NULL
5515 || (h->type != STT_GNU_IFUNC
5516 && (SYMBOL_CALLS_LOCAL (info, h)
5517 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5518 && h->root.type == bfd_link_hash_undefweak))))
5519 {
5520 /* A PLT entry is not required/allowed when:
5521
5522 1. We are not using ld.so; because then the PLT entry
5523 can't be set up, so we can't use one. In this case,
5524 ppc_elf_adjust_dynamic_symbol won't even be called.
5525
5526 2. GC has rendered the entry unused.
5527
5528 3. We know for certain that a call to this symbol
5529 will go to this object, or will remain undefined. */
5530 h->plt.plist = NULL;
5531 h->needs_plt = 0;
5532 }
5533 else
5534 {
5535 /* After adjust_dynamic_symbol, non_got_ref set in the
5536 non-shared case means that we have allocated space in
5537 .dynbss for the symbol and thus dyn_relocs for this
5538 symbol should be discarded.
5539 If we get here we know we are making a PLT entry for this
5540 symbol, and in an executable we'd normally resolve
5541 relocations against this symbol to the PLT entry. Allow
5542 dynamic relocs if the reference is weak, and the dynamic
5543 relocs will not cause text relocation. */
5544 if (!h->ref_regular_nonweak
5545 && h->non_got_ref
5546 && h->type != STT_GNU_IFUNC
5547 && !htab->is_vxworks
5548 && !ppc_elf_hash_entry (h)->has_sda_refs
5549 && !readonly_dynrelocs (h))
5550 h->non_got_ref = 0;
5551 }
5552 return TRUE;
5553 }
5554 else
5555 h->plt.plist = NULL;
5556
5557 /* If this is a weak symbol, and there is a real definition, the
5558 processor independent code will have arranged for us to see the
5559 real definition first, and we can just use the same value. */
5560 if (h->u.weakdef != NULL)
5561 {
5562 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5563 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5564 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5565 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5566 if (ELIMINATE_COPY_RELOCS)
5567 h->non_got_ref = h->u.weakdef->non_got_ref;
5568 return TRUE;
5569 }
5570
5571 /* This is a reference to a symbol defined by a dynamic object which
5572 is not a function. */
5573
5574 /* If we are creating a shared library, we must presume that the
5575 only references to the symbol are via the global offset table.
5576 For such cases we need not do anything here; the relocations will
5577 be handled correctly by relocate_section. */
5578 if (info->shared)
5579 return TRUE;
5580
5581 /* If there are no references to this symbol that do not use the
5582 GOT, we don't need to generate a copy reloc. */
5583 if (!h->non_got_ref)
5584 return TRUE;
5585
5586 /* If we didn't find any dynamic relocs in read-only sections, then
5587 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5588 We can't do this if there are any small data relocations. This
5589 doesn't work on VxWorks, where we can not have dynamic
5590 relocations (other than copy and jump slot relocations) in an
5591 executable. */
5592 if (ELIMINATE_COPY_RELOCS
5593 && !ppc_elf_hash_entry (h)->has_sda_refs
5594 && !htab->is_vxworks
5595 && !h->def_regular
5596 && !readonly_dynrelocs (h))
5597 {
5598 h->non_got_ref = 0;
5599 return TRUE;
5600 }
5601
5602 /* We must allocate the symbol in our .dynbss section, which will
5603 become part of the .bss section of the executable. There will be
5604 an entry for this symbol in the .dynsym section. The dynamic
5605 object will contain position independent code, so all references
5606 from the dynamic object to this symbol will go through the global
5607 offset table. The dynamic linker will use the .dynsym entry to
5608 determine the address it must put in the global offset table, so
5609 both the dynamic object and the regular object will refer to the
5610 same memory location for the variable.
5611
5612 Of course, if the symbol is referenced using SDAREL relocs, we
5613 must instead allocate it in .sbss. */
5614
5615 if (ppc_elf_hash_entry (h)->has_sda_refs)
5616 s = htab->dynsbss;
5617 else
5618 s = htab->dynbss;
5619 BFD_ASSERT (s != NULL);
5620
5621 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5622 copy the initial value out of the dynamic object and into the
5623 runtime process image. We need to remember the offset into the
5624 .rela.bss section we are going to use. */
5625 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5626 {
5627 asection *srel;
5628
5629 if (ppc_elf_hash_entry (h)->has_sda_refs)
5630 srel = htab->relsbss;
5631 else
5632 srel = htab->relbss;
5633 BFD_ASSERT (srel != NULL);
5634 srel->size += sizeof (Elf32_External_Rela);
5635 h->needs_copy = 1;
5636 }
5637
5638 return _bfd_elf_adjust_dynamic_copy (h, s);
5639 }
5640 \f
5641 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5642 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5643 specifying the addend on the plt relocation. For -fpic code, the sym
5644 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5645 xxxxxxxx.got2.plt_pic32.<callee>. */
5646
5647 static bfd_boolean
5648 add_stub_sym (struct plt_entry *ent,
5649 struct elf_link_hash_entry *h,
5650 struct bfd_link_info *info)
5651 {
5652 struct elf_link_hash_entry *sh;
5653 size_t len1, len2, len3;
5654 char *name;
5655 const char *stub;
5656 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5657
5658 if (info->shared)
5659 stub = ".plt_pic32.";
5660 else
5661 stub = ".plt_call32.";
5662
5663 len1 = strlen (h->root.root.string);
5664 len2 = strlen (stub);
5665 len3 = 0;
5666 if (ent->sec)
5667 len3 = strlen (ent->sec->name);
5668 name = bfd_malloc (len1 + len2 + len3 + 9);
5669 if (name == NULL)
5670 return FALSE;
5671 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5672 if (ent->sec)
5673 memcpy (name + 8, ent->sec->name, len3);
5674 memcpy (name + 8 + len3, stub, len2);
5675 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5676 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5677 if (sh == NULL)
5678 return FALSE;
5679 if (sh->root.type == bfd_link_hash_new)
5680 {
5681 sh->root.type = bfd_link_hash_defined;
5682 sh->root.u.def.section = htab->glink;
5683 sh->root.u.def.value = ent->glink_offset;
5684 sh->ref_regular = 1;
5685 sh->def_regular = 1;
5686 sh->ref_regular_nonweak = 1;
5687 sh->forced_local = 1;
5688 sh->non_elf = 0;
5689 }
5690 return TRUE;
5691 }
5692
5693 /* Allocate NEED contiguous space in .got, and return the offset.
5694 Handles allocation of the got header when crossing 32k. */
5695
5696 static bfd_vma
5697 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5698 {
5699 bfd_vma where;
5700 unsigned int max_before_header;
5701
5702 if (htab->plt_type == PLT_VXWORKS)
5703 {
5704 where = htab->got->size;
5705 htab->got->size += need;
5706 }
5707 else
5708 {
5709 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5710 if (need <= htab->got_gap)
5711 {
5712 where = max_before_header - htab->got_gap;
5713 htab->got_gap -= need;
5714 }
5715 else
5716 {
5717 if (htab->got->size + need > max_before_header
5718 && htab->got->size <= max_before_header)
5719 {
5720 htab->got_gap = max_before_header - htab->got->size;
5721 htab->got->size = max_before_header + htab->got_header_size;
5722 }
5723 where = htab->got->size;
5724 htab->got->size += need;
5725 }
5726 }
5727 return where;
5728 }
5729
5730 /* Allocate space in associated reloc sections for dynamic relocs. */
5731
5732 static bfd_boolean
5733 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5734 {
5735 struct bfd_link_info *info = inf;
5736 struct ppc_elf_link_hash_entry *eh;
5737 struct ppc_elf_link_hash_table *htab;
5738 struct elf_dyn_relocs *p;
5739
5740 if (h->root.type == bfd_link_hash_indirect)
5741 return TRUE;
5742
5743 htab = ppc_elf_hash_table (info);
5744 if (htab->elf.dynamic_sections_created
5745 || h->type == STT_GNU_IFUNC)
5746 {
5747 struct plt_entry *ent;
5748 bfd_boolean doneone = FALSE;
5749 bfd_vma plt_offset = 0, glink_offset = 0;
5750 bfd_boolean dyn;
5751
5752 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5753 if (ent->plt.refcount > 0)
5754 {
5755 /* Make sure this symbol is output as a dynamic symbol. */
5756 if (h->dynindx == -1
5757 && !h->forced_local
5758 && !h->def_regular
5759 && htab->elf.dynamic_sections_created)
5760 {
5761 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5762 return FALSE;
5763 }
5764
5765 dyn = htab->elf.dynamic_sections_created;
5766 if (info->shared
5767 || h->type == STT_GNU_IFUNC
5768 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5769 {
5770 asection *s = htab->plt;
5771 if (!dyn || h->dynindx == -1)
5772 s = htab->iplt;
5773
5774 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5775 {
5776 if (!doneone)
5777 {
5778 plt_offset = s->size;
5779 s->size += 4;
5780 }
5781 ent->plt.offset = plt_offset;
5782
5783 s = htab->glink;
5784 if (!doneone || info->shared)
5785 {
5786 glink_offset = s->size;
5787 s->size += GLINK_ENTRY_SIZE;
5788 if (h == htab->tls_get_addr
5789 && !htab->params->no_tls_get_addr_opt)
5790 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5791 }
5792 if (!doneone
5793 && !info->shared
5794 && h->def_dynamic
5795 && !h->def_regular)
5796 {
5797 h->root.u.def.section = s;
5798 h->root.u.def.value = glink_offset;
5799 }
5800 ent->glink_offset = glink_offset;
5801
5802 if (htab->params->emit_stub_syms
5803 && !add_stub_sym (ent, h, info))
5804 return FALSE;
5805 }
5806 else
5807 {
5808 if (!doneone)
5809 {
5810 /* If this is the first .plt entry, make room
5811 for the special first entry. */
5812 if (s->size == 0)
5813 s->size += htab->plt_initial_entry_size;
5814
5815 /* The PowerPC PLT is actually composed of two
5816 parts, the first part is 2 words (for a load
5817 and a jump), and then there is a remaining
5818 word available at the end. */
5819 plt_offset = (htab->plt_initial_entry_size
5820 + (htab->plt_slot_size
5821 * ((s->size
5822 - htab->plt_initial_entry_size)
5823 / htab->plt_entry_size)));
5824
5825 /* If this symbol is not defined in a regular
5826 file, and we are not generating a shared
5827 library, then set the symbol to this location
5828 in the .plt. This is to avoid text
5829 relocations, and is required to make
5830 function pointers compare as equal between
5831 the normal executable and the shared library. */
5832 if (! info->shared
5833 && h->def_dynamic
5834 && !h->def_regular)
5835 {
5836 h->root.u.def.section = s;
5837 h->root.u.def.value = plt_offset;
5838 }
5839
5840 /* Make room for this entry. */
5841 s->size += htab->plt_entry_size;
5842 /* After the 8192nd entry, room for two entries
5843 is allocated. */
5844 if (htab->plt_type == PLT_OLD
5845 && (s->size - htab->plt_initial_entry_size)
5846 / htab->plt_entry_size
5847 > PLT_NUM_SINGLE_ENTRIES)
5848 s->size += htab->plt_entry_size;
5849 }
5850 ent->plt.offset = plt_offset;
5851 }
5852
5853 /* We also need to make an entry in the .rela.plt section. */
5854 if (!doneone)
5855 {
5856 if (!htab->elf.dynamic_sections_created
5857 || h->dynindx == -1)
5858 htab->reliplt->size += sizeof (Elf32_External_Rela);
5859 else
5860 {
5861 htab->relplt->size += sizeof (Elf32_External_Rela);
5862
5863 if (htab->plt_type == PLT_VXWORKS)
5864 {
5865 /* Allocate space for the unloaded relocations. */
5866 if (!info->shared
5867 && htab->elf.dynamic_sections_created)
5868 {
5869 if (ent->plt.offset
5870 == (bfd_vma) htab->plt_initial_entry_size)
5871 {
5872 htab->srelplt2->size
5873 += (sizeof (Elf32_External_Rela)
5874 * VXWORKS_PLTRESOLVE_RELOCS);
5875 }
5876
5877 htab->srelplt2->size
5878 += (sizeof (Elf32_External_Rela)
5879 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5880 }
5881
5882 /* Every PLT entry has an associated GOT entry in
5883 .got.plt. */
5884 htab->sgotplt->size += 4;
5885 }
5886 }
5887 doneone = TRUE;
5888 }
5889 }
5890 else
5891 ent->plt.offset = (bfd_vma) -1;
5892 }
5893 else
5894 ent->plt.offset = (bfd_vma) -1;
5895
5896 if (!doneone)
5897 {
5898 h->plt.plist = NULL;
5899 h->needs_plt = 0;
5900 }
5901 }
5902 else
5903 {
5904 h->plt.plist = NULL;
5905 h->needs_plt = 0;
5906 }
5907
5908 eh = (struct ppc_elf_link_hash_entry *) h;
5909 if (eh->elf.got.refcount > 0)
5910 {
5911 bfd_boolean dyn;
5912 unsigned int need;
5913
5914 /* Make sure this symbol is output as a dynamic symbol. */
5915 if (eh->elf.dynindx == -1
5916 && !eh->elf.forced_local
5917 && eh->elf.type != STT_GNU_IFUNC
5918 && htab->elf.dynamic_sections_created)
5919 {
5920 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5921 return FALSE;
5922 }
5923
5924 need = 0;
5925 if ((eh->tls_mask & TLS_TLS) != 0)
5926 {
5927 if ((eh->tls_mask & TLS_LD) != 0)
5928 {
5929 if (!eh->elf.def_dynamic)
5930 /* We'll just use htab->tlsld_got.offset. This should
5931 always be the case. It's a little odd if we have
5932 a local dynamic reloc against a non-local symbol. */
5933 htab->tlsld_got.refcount += 1;
5934 else
5935 need += 8;
5936 }
5937 if ((eh->tls_mask & TLS_GD) != 0)
5938 need += 8;
5939 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5940 need += 4;
5941 if ((eh->tls_mask & TLS_DTPREL) != 0)
5942 need += 4;
5943 }
5944 else
5945 need += 4;
5946 if (need == 0)
5947 eh->elf.got.offset = (bfd_vma) -1;
5948 else
5949 {
5950 eh->elf.got.offset = allocate_got (htab, need);
5951 dyn = htab->elf.dynamic_sections_created;
5952 if ((info->shared
5953 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5954 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5955 || eh->elf.root.type != bfd_link_hash_undefweak))
5956 {
5957 asection *rsec = htab->relgot;
5958
5959 if (eh->elf.type == STT_GNU_IFUNC)
5960 rsec = htab->reliplt;
5961 /* All the entries we allocated need relocs.
5962 Except LD only needs one. */
5963 if ((eh->tls_mask & TLS_LD) != 0
5964 && eh->elf.def_dynamic)
5965 need -= 4;
5966 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5967 }
5968 }
5969 }
5970 else
5971 eh->elf.got.offset = (bfd_vma) -1;
5972
5973 if (eh->dyn_relocs == NULL
5974 || !htab->elf.dynamic_sections_created)
5975 return TRUE;
5976
5977 /* In the shared -Bsymbolic case, discard space allocated for
5978 dynamic pc-relative relocs against symbols which turn out to be
5979 defined in regular objects. For the normal shared case, discard
5980 space for relocs that have become local due to symbol visibility
5981 changes. */
5982
5983 if (info->shared)
5984 {
5985 /* Relocs that use pc_count are those that appear on a call insn,
5986 or certain REL relocs (see must_be_dyn_reloc) that can be
5987 generated via assembly. We want calls to protected symbols to
5988 resolve directly to the function rather than going via the plt.
5989 If people want function pointer comparisons to work as expected
5990 then they should avoid writing weird assembly. */
5991 if (SYMBOL_CALLS_LOCAL (info, h))
5992 {
5993 struct elf_dyn_relocs **pp;
5994
5995 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5996 {
5997 p->count -= p->pc_count;
5998 p->pc_count = 0;
5999 if (p->count == 0)
6000 *pp = p->next;
6001 else
6002 pp = &p->next;
6003 }
6004 }
6005
6006 if (htab->is_vxworks)
6007 {
6008 struct elf_dyn_relocs **pp;
6009
6010 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6011 {
6012 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6013 *pp = p->next;
6014 else
6015 pp = &p->next;
6016 }
6017 }
6018
6019 /* Discard relocs on undefined symbols that must be local. */
6020 if (eh->dyn_relocs != NULL
6021 && h->root.type == bfd_link_hash_undefined
6022 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6023 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6024 eh->dyn_relocs = NULL;
6025
6026 /* Also discard relocs on undefined weak syms with non-default
6027 visibility. */
6028 if (eh->dyn_relocs != NULL
6029 && h->root.type == bfd_link_hash_undefweak)
6030 {
6031 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6032 eh->dyn_relocs = NULL;
6033
6034 /* Make sure undefined weak symbols are output as a dynamic
6035 symbol in PIEs. */
6036 else if (h->dynindx == -1
6037 && !h->forced_local
6038 && !h->def_regular)
6039 {
6040 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6041 return FALSE;
6042 }
6043 }
6044 }
6045 else if (ELIMINATE_COPY_RELOCS)
6046 {
6047 /* For the non-shared case, discard space for relocs against
6048 symbols which turn out to need copy relocs or are not
6049 dynamic. */
6050
6051 if (!h->non_got_ref
6052 && !h->def_regular)
6053 {
6054 /* Make sure this symbol is output as a dynamic symbol.
6055 Undefined weak syms won't yet be marked as dynamic. */
6056 if (h->dynindx == -1
6057 && !h->forced_local)
6058 {
6059 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6060 return FALSE;
6061 }
6062
6063 /* If that succeeded, we know we'll be keeping all the
6064 relocs. */
6065 if (h->dynindx != -1)
6066 goto keep;
6067 }
6068
6069 eh->dyn_relocs = NULL;
6070
6071 keep: ;
6072 }
6073
6074 /* Finally, allocate space. */
6075 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6076 {
6077 asection *sreloc = elf_section_data (p->sec)->sreloc;
6078 if (eh->elf.type == STT_GNU_IFUNC)
6079 sreloc = htab->reliplt;
6080 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6081 }
6082
6083 return TRUE;
6084 }
6085
6086 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6087 read-only sections. */
6088
6089 static bfd_boolean
6090 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6091 {
6092 if (h->root.type == bfd_link_hash_indirect)
6093 return TRUE;
6094
6095 if (readonly_dynrelocs (h))
6096 {
6097 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6098
6099 /* Not an error, just cut short the traversal. */
6100 return FALSE;
6101 }
6102 return TRUE;
6103 }
6104
6105 static const unsigned char glink_eh_frame_cie[] =
6106 {
6107 0, 0, 0, 16, /* length. */
6108 0, 0, 0, 0, /* id. */
6109 1, /* CIE version. */
6110 'z', 'R', 0, /* Augmentation string. */
6111 4, /* Code alignment. */
6112 0x7c, /* Data alignment. */
6113 65, /* RA reg. */
6114 1, /* Augmentation size. */
6115 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6116 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6117 };
6118
6119 /* Set the sizes of the dynamic sections. */
6120
6121 static bfd_boolean
6122 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6123 struct bfd_link_info *info)
6124 {
6125 struct ppc_elf_link_hash_table *htab;
6126 asection *s;
6127 bfd_boolean relocs;
6128 bfd *ibfd;
6129
6130 #ifdef DEBUG
6131 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6132 #endif
6133
6134 htab = ppc_elf_hash_table (info);
6135 BFD_ASSERT (htab->elf.dynobj != NULL);
6136
6137 if (elf_hash_table (info)->dynamic_sections_created)
6138 {
6139 /* Set the contents of the .interp section to the interpreter. */
6140 if (info->executable)
6141 {
6142 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6143 BFD_ASSERT (s != NULL);
6144 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6145 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6146 }
6147 }
6148
6149 if (htab->plt_type == PLT_OLD)
6150 htab->got_header_size = 16;
6151 else if (htab->plt_type == PLT_NEW)
6152 htab->got_header_size = 12;
6153
6154 /* Set up .got offsets for local syms, and space for local dynamic
6155 relocs. */
6156 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6157 {
6158 bfd_signed_vma *local_got;
6159 bfd_signed_vma *end_local_got;
6160 struct plt_entry **local_plt;
6161 struct plt_entry **end_local_plt;
6162 char *lgot_masks;
6163 bfd_size_type locsymcount;
6164 Elf_Internal_Shdr *symtab_hdr;
6165
6166 if (!is_ppc_elf (ibfd))
6167 continue;
6168
6169 for (s = ibfd->sections; s != NULL; s = s->next)
6170 {
6171 struct ppc_dyn_relocs *p;
6172
6173 for (p = ((struct ppc_dyn_relocs *)
6174 elf_section_data (s)->local_dynrel);
6175 p != NULL;
6176 p = p->next)
6177 {
6178 if (!bfd_is_abs_section (p->sec)
6179 && bfd_is_abs_section (p->sec->output_section))
6180 {
6181 /* Input section has been discarded, either because
6182 it is a copy of a linkonce section or due to
6183 linker script /DISCARD/, so we'll be discarding
6184 the relocs too. */
6185 }
6186 else if (htab->is_vxworks
6187 && strcmp (p->sec->output_section->name,
6188 ".tls_vars") == 0)
6189 {
6190 /* Relocations in vxworks .tls_vars sections are
6191 handled specially by the loader. */
6192 }
6193 else if (p->count != 0)
6194 {
6195 asection *sreloc = elf_section_data (p->sec)->sreloc;
6196 if (p->ifunc)
6197 sreloc = htab->reliplt;
6198 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6199 if ((p->sec->output_section->flags
6200 & (SEC_READONLY | SEC_ALLOC))
6201 == (SEC_READONLY | SEC_ALLOC))
6202 info->flags |= DF_TEXTREL;
6203 }
6204 }
6205 }
6206
6207 local_got = elf_local_got_refcounts (ibfd);
6208 if (!local_got)
6209 continue;
6210
6211 symtab_hdr = &elf_symtab_hdr (ibfd);
6212 locsymcount = symtab_hdr->sh_info;
6213 end_local_got = local_got + locsymcount;
6214 local_plt = (struct plt_entry **) end_local_got;
6215 end_local_plt = local_plt + locsymcount;
6216 lgot_masks = (char *) end_local_plt;
6217
6218 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6219 if (*local_got > 0)
6220 {
6221 unsigned int need = 0;
6222 if ((*lgot_masks & TLS_TLS) != 0)
6223 {
6224 if ((*lgot_masks & TLS_GD) != 0)
6225 need += 8;
6226 if ((*lgot_masks & TLS_LD) != 0)
6227 htab->tlsld_got.refcount += 1;
6228 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6229 need += 4;
6230 if ((*lgot_masks & TLS_DTPREL) != 0)
6231 need += 4;
6232 }
6233 else
6234 need += 4;
6235 if (need == 0)
6236 *local_got = (bfd_vma) -1;
6237 else
6238 {
6239 *local_got = allocate_got (htab, need);
6240 if (info->shared)
6241 {
6242 asection *srel = htab->relgot;
6243 if ((*lgot_masks & PLT_IFUNC) != 0)
6244 srel = htab->reliplt;
6245 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6246 }
6247 }
6248 }
6249 else
6250 *local_got = (bfd_vma) -1;
6251
6252 if (htab->is_vxworks)
6253 continue;
6254
6255 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6256 for (; local_plt < end_local_plt; ++local_plt)
6257 {
6258 struct plt_entry *ent;
6259 bfd_boolean doneone = FALSE;
6260 bfd_vma plt_offset = 0, glink_offset = 0;
6261
6262 for (ent = *local_plt; ent != NULL; ent = ent->next)
6263 if (ent->plt.refcount > 0)
6264 {
6265 s = htab->iplt;
6266
6267 if (!doneone)
6268 {
6269 plt_offset = s->size;
6270 s->size += 4;
6271 }
6272 ent->plt.offset = plt_offset;
6273
6274 s = htab->glink;
6275 if (!doneone || info->shared)
6276 {
6277 glink_offset = s->size;
6278 s->size += GLINK_ENTRY_SIZE;
6279 }
6280 ent->glink_offset = glink_offset;
6281
6282 if (!doneone)
6283 {
6284 htab->reliplt->size += sizeof (Elf32_External_Rela);
6285 doneone = TRUE;
6286 }
6287 }
6288 else
6289 ent->plt.offset = (bfd_vma) -1;
6290 }
6291 }
6292
6293 /* Allocate space for global sym dynamic relocs. */
6294 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6295
6296 if (htab->tlsld_got.refcount > 0)
6297 {
6298 htab->tlsld_got.offset = allocate_got (htab, 8);
6299 if (info->shared)
6300 htab->relgot->size += sizeof (Elf32_External_Rela);
6301 }
6302 else
6303 htab->tlsld_got.offset = (bfd_vma) -1;
6304
6305 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6306 {
6307 unsigned int g_o_t = 32768;
6308
6309 /* If we haven't allocated the header, do so now. When we get here,
6310 for old plt/got the got size will be 0 to 32764 (not allocated),
6311 or 32780 to 65536 (header allocated). For new plt/got, the
6312 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6313 if (htab->got->size <= 32768)
6314 {
6315 g_o_t = htab->got->size;
6316 if (htab->plt_type == PLT_OLD)
6317 g_o_t += 4;
6318 htab->got->size += htab->got_header_size;
6319 }
6320
6321 htab->elf.hgot->root.u.def.value = g_o_t;
6322 }
6323 if (info->shared)
6324 {
6325 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6326 if (sda != NULL
6327 && !(sda->root.type == bfd_link_hash_defined
6328 || sda->root.type == bfd_link_hash_defweak))
6329 {
6330 sda->root.type = bfd_link_hash_defined;
6331 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6332 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6333 }
6334 }
6335
6336 if (htab->glink != NULL
6337 && htab->glink->size != 0
6338 && htab->elf.dynamic_sections_created)
6339 {
6340 htab->glink_pltresolve = htab->glink->size;
6341 /* Space for the branch table. */
6342 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6343 /* Pad out to align the start of PLTresolve. */
6344 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6345 ? 63 : 15);
6346 htab->glink->size += GLINK_PLTRESOLVE;
6347
6348 if (htab->params->emit_stub_syms)
6349 {
6350 struct elf_link_hash_entry *sh;
6351 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6352 TRUE, FALSE, FALSE);
6353 if (sh == NULL)
6354 return FALSE;
6355 if (sh->root.type == bfd_link_hash_new)
6356 {
6357 sh->root.type = bfd_link_hash_defined;
6358 sh->root.u.def.section = htab->glink;
6359 sh->root.u.def.value = htab->glink_pltresolve;
6360 sh->ref_regular = 1;
6361 sh->def_regular = 1;
6362 sh->ref_regular_nonweak = 1;
6363 sh->forced_local = 1;
6364 sh->non_elf = 0;
6365 }
6366 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6367 TRUE, FALSE, FALSE);
6368 if (sh == NULL)
6369 return FALSE;
6370 if (sh->root.type == bfd_link_hash_new)
6371 {
6372 sh->root.type = bfd_link_hash_defined;
6373 sh->root.u.def.section = htab->glink;
6374 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6375 sh->ref_regular = 1;
6376 sh->def_regular = 1;
6377 sh->ref_regular_nonweak = 1;
6378 sh->forced_local = 1;
6379 sh->non_elf = 0;
6380 }
6381 }
6382 }
6383
6384 if (htab->glink != NULL
6385 && htab->glink->size != 0
6386 && htab->glink_eh_frame != NULL
6387 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6388 && _bfd_elf_eh_frame_present (info))
6389 {
6390 s = htab->glink_eh_frame;
6391 s->size = sizeof (glink_eh_frame_cie) + 20;
6392 if (info->shared)
6393 {
6394 s->size += 4;
6395 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6396 s->size += 4;
6397 }
6398 }
6399
6400 /* We've now determined the sizes of the various dynamic sections.
6401 Allocate memory for them. */
6402 relocs = FALSE;
6403 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6404 {
6405 bfd_boolean strip_section = TRUE;
6406
6407 if ((s->flags & SEC_LINKER_CREATED) == 0)
6408 continue;
6409
6410 if (s == htab->plt
6411 || s == htab->got)
6412 {
6413 /* We'd like to strip these sections if they aren't needed, but if
6414 we've exported dynamic symbols from them we must leave them.
6415 It's too late to tell BFD to get rid of the symbols. */
6416 if (htab->elf.hplt != NULL)
6417 strip_section = FALSE;
6418 /* Strip this section if we don't need it; see the
6419 comment below. */
6420 }
6421 else if (s == htab->iplt
6422 || s == htab->glink
6423 || s == htab->glink_eh_frame
6424 || s == htab->sgotplt
6425 || s == htab->sbss
6426 || s == htab->dynbss
6427 || s == htab->dynsbss
6428 || s == htab->sdata[0].section
6429 || s == htab->sdata[1].section)
6430 {
6431 /* Strip these too. */
6432 }
6433 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6434 ".rela"))
6435 {
6436 if (s->size != 0)
6437 {
6438 /* Remember whether there are any relocation sections. */
6439 relocs = TRUE;
6440
6441 /* We use the reloc_count field as a counter if we need
6442 to copy relocs into the output file. */
6443 s->reloc_count = 0;
6444 }
6445 }
6446 else
6447 {
6448 /* It's not one of our sections, so don't allocate space. */
6449 continue;
6450 }
6451
6452 if (s->size == 0 && strip_section)
6453 {
6454 /* If we don't need this section, strip it from the
6455 output file. This is mostly to handle .rela.bss and
6456 .rela.plt. We must create both sections in
6457 create_dynamic_sections, because they must be created
6458 before the linker maps input sections to output
6459 sections. The linker does that before
6460 adjust_dynamic_symbol is called, and it is that
6461 function which decides whether anything needs to go
6462 into these sections. */
6463 s->flags |= SEC_EXCLUDE;
6464 continue;
6465 }
6466
6467 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6468 continue;
6469
6470 /* Allocate memory for the section contents. */
6471 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6472 if (s->contents == NULL)
6473 return FALSE;
6474 }
6475
6476 if (htab->elf.dynamic_sections_created)
6477 {
6478 /* Add some entries to the .dynamic section. We fill in the
6479 values later, in ppc_elf_finish_dynamic_sections, but we
6480 must add the entries now so that we get the correct size for
6481 the .dynamic section. The DT_DEBUG entry is filled in by the
6482 dynamic linker and used by the debugger. */
6483 #define add_dynamic_entry(TAG, VAL) \
6484 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6485
6486 if (info->executable)
6487 {
6488 if (!add_dynamic_entry (DT_DEBUG, 0))
6489 return FALSE;
6490 }
6491
6492 if (htab->plt != NULL && htab->plt->size != 0)
6493 {
6494 if (!add_dynamic_entry (DT_PLTGOT, 0)
6495 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6496 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6497 || !add_dynamic_entry (DT_JMPREL, 0))
6498 return FALSE;
6499 }
6500
6501 if (htab->plt_type == PLT_NEW
6502 && htab->glink != NULL
6503 && htab->glink->size != 0)
6504 {
6505 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6506 return FALSE;
6507 if (!htab->params->no_tls_get_addr_opt
6508 && htab->tls_get_addr != NULL
6509 && htab->tls_get_addr->plt.plist != NULL
6510 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6511 return FALSE;
6512 }
6513
6514 if (relocs)
6515 {
6516 if (!add_dynamic_entry (DT_RELA, 0)
6517 || !add_dynamic_entry (DT_RELASZ, 0)
6518 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6519 return FALSE;
6520 }
6521
6522 /* If any dynamic relocs apply to a read-only section, then we
6523 need a DT_TEXTREL entry. */
6524 if ((info->flags & DF_TEXTREL) == 0)
6525 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6526 info);
6527
6528 if ((info->flags & DF_TEXTREL) != 0)
6529 {
6530 if (!add_dynamic_entry (DT_TEXTREL, 0))
6531 return FALSE;
6532 }
6533 if (htab->is_vxworks
6534 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6535 return FALSE;
6536 }
6537 #undef add_dynamic_entry
6538
6539 if (htab->glink_eh_frame != NULL
6540 && htab->glink_eh_frame->contents != NULL)
6541 {
6542 unsigned char *p = htab->glink_eh_frame->contents;
6543 bfd_vma val;
6544
6545 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6546 /* CIE length (rewrite in case little-endian). */
6547 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6548 p += sizeof (glink_eh_frame_cie);
6549 /* FDE length. */
6550 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6551 bfd_put_32 (htab->elf.dynobj, val, p);
6552 p += 4;
6553 /* CIE pointer. */
6554 val = p - htab->glink_eh_frame->contents;
6555 bfd_put_32 (htab->elf.dynobj, val, p);
6556 p += 4;
6557 /* Offset to .glink. Set later. */
6558 p += 4;
6559 /* .glink size. */
6560 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6561 p += 4;
6562 /* Augmentation. */
6563 p += 1;
6564
6565 if (info->shared
6566 && htab->elf.dynamic_sections_created)
6567 {
6568 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6569 if (adv < 64)
6570 *p++ = DW_CFA_advance_loc + adv;
6571 else if (adv < 256)
6572 {
6573 *p++ = DW_CFA_advance_loc1;
6574 *p++ = adv;
6575 }
6576 else if (adv < 65536)
6577 {
6578 *p++ = DW_CFA_advance_loc2;
6579 bfd_put_16 (htab->elf.dynobj, adv, p);
6580 p += 2;
6581 }
6582 else
6583 {
6584 *p++ = DW_CFA_advance_loc4;
6585 bfd_put_32 (htab->elf.dynobj, adv, p);
6586 p += 4;
6587 }
6588 *p++ = DW_CFA_register;
6589 *p++ = 65;
6590 p++;
6591 *p++ = DW_CFA_advance_loc + 4;
6592 *p++ = DW_CFA_restore_extended;
6593 *p++ = 65;
6594 }
6595 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6596 == htab->glink_eh_frame->size);
6597 }
6598
6599 return TRUE;
6600 }
6601
6602 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6603
6604 static bfd_boolean
6605 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6606 {
6607 if (h->plt.plist != NULL
6608 && !h->def_regular
6609 && (!h->pointer_equality_needed
6610 || !h->ref_regular_nonweak))
6611 return FALSE;
6612
6613 return _bfd_elf_hash_symbol (h);
6614 }
6615 \f
6616 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6617
6618 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6619 used for some functions that are allowed to break the ABI). */
6620 static const int shared_stub_entry[] =
6621 {
6622 0x7c0802a6, /* mflr 0 */
6623 0x429f0005, /* bcl 20, 31, .Lxxx */
6624 0x7d8802a6, /* mflr 12 */
6625 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6626 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6627 0x7c0803a6, /* mtlr 0 */
6628 0x7d8903a6, /* mtctr 12 */
6629 0x4e800420, /* bctr */
6630 };
6631
6632 static const int stub_entry[] =
6633 {
6634 0x3d800000, /* lis 12,xxx@ha */
6635 0x398c0000, /* addi 12,12,xxx@l */
6636 0x7d8903a6, /* mtctr 12 */
6637 0x4e800420, /* bctr */
6638 };
6639
6640 struct ppc_elf_relax_info
6641 {
6642 unsigned int workaround_size;
6643 };
6644
6645 /* This function implements long branch trampolines, and the ppc476
6646 icache bug workaround. Any section needing trampolines or patch
6647 space for the workaround has its size extended so that we can
6648 add trampolines at the end of the section. */
6649
6650 static bfd_boolean
6651 ppc_elf_relax_section (bfd *abfd,
6652 asection *isec,
6653 struct bfd_link_info *link_info,
6654 bfd_boolean *again)
6655 {
6656 struct one_fixup
6657 {
6658 struct one_fixup *next;
6659 asection *tsec;
6660 /* Final link, can use the symbol offset. For a
6661 relocatable link we use the symbol's index. */
6662 bfd_vma toff;
6663 bfd_vma trampoff;
6664 };
6665
6666 Elf_Internal_Shdr *symtab_hdr;
6667 bfd_byte *contents = NULL;
6668 Elf_Internal_Sym *isymbuf = NULL;
6669 Elf_Internal_Rela *internal_relocs = NULL;
6670 Elf_Internal_Rela *irel, *irelend = NULL;
6671 struct one_fixup *fixups = NULL;
6672 struct ppc_elf_relax_info *relax_info = NULL;
6673 unsigned changes = 0;
6674 bfd_boolean workaround_change;
6675 struct ppc_elf_link_hash_table *htab;
6676 bfd_size_type trampbase, trampoff, newsize;
6677 asection *got2;
6678 bfd_boolean maybe_pasted;
6679
6680 *again = FALSE;
6681
6682 /* No need to do anything with non-alloc or non-code sections. */
6683 if ((isec->flags & SEC_ALLOC) == 0
6684 || (isec->flags & SEC_CODE) == 0
6685 || (isec->flags & SEC_LINKER_CREATED) != 0
6686 || isec->size < 4)
6687 return TRUE;
6688
6689 /* We cannot represent the required PIC relocs in the output, so don't
6690 do anything. The linker doesn't support mixing -shared and -r
6691 anyway. */
6692 if (link_info->relocatable && link_info->shared)
6693 return TRUE;
6694
6695 htab = ppc_elf_hash_table (link_info);
6696 if (htab == NULL)
6697 return TRUE;
6698
6699 isec->size = (isec->size + 3) & -4;
6700 if (isec->rawsize == 0)
6701 isec->rawsize = isec->size;
6702 trampbase = isec->size;
6703
6704 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6705 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6706 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6707
6708 if (htab->params->ppc476_workaround)
6709 {
6710 if (elf_section_data (isec)->sec_info == NULL)
6711 {
6712 elf_section_data (isec)->sec_info
6713 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6714 if (elf_section_data (isec)->sec_info == NULL)
6715 return FALSE;
6716 }
6717 relax_info = elf_section_data (isec)->sec_info;
6718 trampbase -= relax_info->workaround_size;
6719 }
6720
6721 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6722 || strcmp (isec->output_section->name, ".fini") == 0);
6723 /* Space for a branch around any trampolines. */
6724 trampoff = trampbase;
6725 if (maybe_pasted && trampbase == isec->rawsize)
6726 trampoff += 4;
6727
6728 symtab_hdr = &elf_symtab_hdr (abfd);
6729
6730 if (htab->params->branch_trampolines)
6731 {
6732 /* Get a copy of the native relocations. */
6733 if (isec->reloc_count != 0)
6734 {
6735 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6736 link_info->keep_memory);
6737 if (internal_relocs == NULL)
6738 goto error_return;
6739 }
6740
6741 got2 = bfd_get_section_by_name (abfd, ".got2");
6742
6743 irelend = internal_relocs + isec->reloc_count;
6744 for (irel = internal_relocs; irel < irelend; irel++)
6745 {
6746 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6747 bfd_vma toff, roff;
6748 asection *tsec;
6749 struct one_fixup *f;
6750 size_t insn_offset = 0;
6751 bfd_vma max_branch_offset, val;
6752 bfd_byte *hit_addr;
6753 unsigned long t0;
6754 struct elf_link_hash_entry *h;
6755 struct plt_entry **plist;
6756 unsigned char sym_type;
6757
6758 switch (r_type)
6759 {
6760 case R_PPC_REL24:
6761 case R_PPC_LOCAL24PC:
6762 case R_PPC_PLTREL24:
6763 max_branch_offset = 1 << 25;
6764 break;
6765
6766 case R_PPC_REL14:
6767 case R_PPC_REL14_BRTAKEN:
6768 case R_PPC_REL14_BRNTAKEN:
6769 max_branch_offset = 1 << 15;
6770 break;
6771
6772 default:
6773 continue;
6774 }
6775
6776 /* Get the value of the symbol referred to by the reloc. */
6777 h = NULL;
6778 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6779 {
6780 /* A local symbol. */
6781 Elf_Internal_Sym *isym;
6782
6783 /* Read this BFD's local symbols. */
6784 if (isymbuf == NULL)
6785 {
6786 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6787 if (isymbuf == NULL)
6788 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6789 symtab_hdr->sh_info, 0,
6790 NULL, NULL, NULL);
6791 if (isymbuf == 0)
6792 goto error_return;
6793 }
6794 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6795 if (isym->st_shndx == SHN_UNDEF)
6796 tsec = bfd_und_section_ptr;
6797 else if (isym->st_shndx == SHN_ABS)
6798 tsec = bfd_abs_section_ptr;
6799 else if (isym->st_shndx == SHN_COMMON)
6800 tsec = bfd_com_section_ptr;
6801 else
6802 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6803
6804 toff = isym->st_value;
6805 sym_type = ELF_ST_TYPE (isym->st_info);
6806 }
6807 else
6808 {
6809 /* Global symbol handling. */
6810 unsigned long indx;
6811
6812 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6813 h = elf_sym_hashes (abfd)[indx];
6814
6815 while (h->root.type == bfd_link_hash_indirect
6816 || h->root.type == bfd_link_hash_warning)
6817 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6818
6819 if (h->root.type == bfd_link_hash_defined
6820 || h->root.type == bfd_link_hash_defweak)
6821 {
6822 tsec = h->root.u.def.section;
6823 toff = h->root.u.def.value;
6824 }
6825 else if (h->root.type == bfd_link_hash_undefined
6826 || h->root.type == bfd_link_hash_undefweak)
6827 {
6828 tsec = bfd_und_section_ptr;
6829 toff = link_info->relocatable ? indx : 0;
6830 }
6831 else
6832 continue;
6833
6834 /* If this branch is to __tls_get_addr then we may later
6835 optimise away the call. We won't be needing a long-
6836 branch stub in that case. */
6837 if (link_info->executable
6838 && !link_info->relocatable
6839 && h == htab->tls_get_addr
6840 && irel != internal_relocs)
6841 {
6842 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6843 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6844 unsigned int tls_mask = 0;
6845
6846 /* The previous reloc should be one of R_PPC_TLSGD or
6847 R_PPC_TLSLD, or for older object files, a reloc
6848 on the __tls_get_addr arg setup insn. Get tls
6849 mask bits from the symbol on that reloc. */
6850 if (t_symndx < symtab_hdr->sh_info)
6851 {
6852 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6853
6854 if (local_got_offsets != NULL)
6855 {
6856 struct plt_entry **local_plt = (struct plt_entry **)
6857 (local_got_offsets + symtab_hdr->sh_info);
6858 char *lgot_masks = (char *)
6859 (local_plt + symtab_hdr->sh_info);
6860 tls_mask = lgot_masks[t_symndx];
6861 }
6862 }
6863 else
6864 {
6865 struct elf_link_hash_entry *th
6866 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6867
6868 while (th->root.type == bfd_link_hash_indirect
6869 || th->root.type == bfd_link_hash_warning)
6870 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6871
6872 tls_mask
6873 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6874 }
6875
6876 /* The mask bits tell us if the call will be
6877 optimised away. */
6878 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6879 && (t_rtype == R_PPC_TLSGD
6880 || t_rtype == R_PPC_GOT_TLSGD16
6881 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6882 continue;
6883 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6884 && (t_rtype == R_PPC_TLSLD
6885 || t_rtype == R_PPC_GOT_TLSLD16
6886 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6887 continue;
6888 }
6889
6890 sym_type = h->type;
6891 }
6892
6893 /* The condition here under which we call find_plt_ent must
6894 match that in relocate_section. If we call find_plt_ent here
6895 but not in relocate_section, or vice versa, then the branch
6896 destination used here may be incorrect. */
6897 plist = NULL;
6898 if (h != NULL)
6899 {
6900 /* We know is_branch_reloc (r_type) is true. */
6901 if (h->type == STT_GNU_IFUNC
6902 || r_type == R_PPC_PLTREL24)
6903 plist = &h->plt.plist;
6904 }
6905 else if (sym_type == STT_GNU_IFUNC
6906 && elf_local_got_offsets (abfd) != NULL)
6907 {
6908 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6909 struct plt_entry **local_plt = (struct plt_entry **)
6910 (local_got_offsets + symtab_hdr->sh_info);
6911 plist = local_plt + ELF32_R_SYM (irel->r_info);
6912 }
6913 if (plist != NULL)
6914 {
6915 bfd_vma addend = 0;
6916 struct plt_entry *ent;
6917
6918 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6919 addend = irel->r_addend;
6920 ent = find_plt_ent (plist, got2, addend);
6921 if (ent != NULL)
6922 {
6923 if (htab->plt_type == PLT_NEW
6924 || h == NULL
6925 || !htab->elf.dynamic_sections_created
6926 || h->dynindx == -1)
6927 {
6928 tsec = htab->glink;
6929 toff = ent->glink_offset;
6930 }
6931 else
6932 {
6933 tsec = htab->plt;
6934 toff = ent->plt.offset;
6935 }
6936 }
6937 }
6938
6939 /* If the branch and target are in the same section, you have
6940 no hope of adding stubs. We'll error out later should the
6941 branch overflow. */
6942 if (tsec == isec)
6943 continue;
6944
6945 /* There probably isn't any reason to handle symbols in
6946 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6947 attribute for a code section, and we are only looking at
6948 branches. However, implement it correctly here as a
6949 reference for other target relax_section functions. */
6950 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6951 {
6952 /* At this stage in linking, no SEC_MERGE symbol has been
6953 adjusted, so all references to such symbols need to be
6954 passed through _bfd_merged_section_offset. (Later, in
6955 relocate_section, all SEC_MERGE symbols *except* for
6956 section symbols have been adjusted.)
6957
6958 gas may reduce relocations against symbols in SEC_MERGE
6959 sections to a relocation against the section symbol when
6960 the original addend was zero. When the reloc is against
6961 a section symbol we should include the addend in the
6962 offset passed to _bfd_merged_section_offset, since the
6963 location of interest is the original symbol. On the
6964 other hand, an access to "sym+addend" where "sym" is not
6965 a section symbol should not include the addend; Such an
6966 access is presumed to be an offset from "sym"; The
6967 location of interest is just "sym". */
6968 if (sym_type == STT_SECTION)
6969 toff += irel->r_addend;
6970
6971 toff
6972 = _bfd_merged_section_offset (abfd, &tsec,
6973 elf_section_data (tsec)->sec_info,
6974 toff);
6975
6976 if (sym_type != STT_SECTION)
6977 toff += irel->r_addend;
6978 }
6979 /* PLTREL24 addends are special. */
6980 else if (r_type != R_PPC_PLTREL24)
6981 toff += irel->r_addend;
6982
6983 /* Attempted -shared link of non-pic code loses. */
6984 if ((!link_info->relocatable
6985 && tsec == bfd_und_section_ptr)
6986 || tsec->output_section == NULL
6987 || (tsec->owner != NULL
6988 && (tsec->owner->flags & BFD_PLUGIN) != 0))
6989 continue;
6990
6991 roff = irel->r_offset;
6992
6993 /* If the branch is in range, no need to do anything. */
6994 if (tsec != bfd_und_section_ptr
6995 && (!link_info->relocatable
6996 /* A relocatable link may have sections moved during
6997 final link, so do not presume they remain in range. */
6998 || tsec->output_section == isec->output_section))
6999 {
7000 bfd_vma symaddr, reladdr;
7001
7002 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7003 reladdr = isec->output_section->vma + isec->output_offset + roff;
7004 if (symaddr - reladdr + max_branch_offset
7005 < 2 * max_branch_offset)
7006 continue;
7007 }
7008
7009 /* Look for an existing fixup to this address. */
7010 for (f = fixups; f ; f = f->next)
7011 if (f->tsec == tsec && f->toff == toff)
7012 break;
7013
7014 if (f == NULL)
7015 {
7016 size_t size;
7017 unsigned long stub_rtype;
7018
7019 val = trampoff - roff;
7020 if (val >= max_branch_offset)
7021 /* Oh dear, we can't reach a trampoline. Don't try to add
7022 one. We'll report an error later. */
7023 continue;
7024
7025 if (link_info->shared)
7026 {
7027 size = 4 * ARRAY_SIZE (shared_stub_entry);
7028 insn_offset = 12;
7029 }
7030 else
7031 {
7032 size = 4 * ARRAY_SIZE (stub_entry);
7033 insn_offset = 0;
7034 }
7035 stub_rtype = R_PPC_RELAX;
7036 if (tsec == htab->plt
7037 || tsec == htab->glink)
7038 {
7039 stub_rtype = R_PPC_RELAX_PLT;
7040 if (r_type == R_PPC_PLTREL24)
7041 stub_rtype = R_PPC_RELAX_PLTREL24;
7042 }
7043
7044 /* Hijack the old relocation. Since we need two
7045 relocations for this use a "composite" reloc. */
7046 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7047 stub_rtype);
7048 irel->r_offset = trampoff + insn_offset;
7049 if (r_type == R_PPC_PLTREL24
7050 && stub_rtype != R_PPC_RELAX_PLTREL24)
7051 irel->r_addend = 0;
7052
7053 /* Record the fixup so we don't do it again this section. */
7054 f = bfd_malloc (sizeof (*f));
7055 f->next = fixups;
7056 f->tsec = tsec;
7057 f->toff = toff;
7058 f->trampoff = trampoff;
7059 fixups = f;
7060
7061 trampoff += size;
7062 changes++;
7063 }
7064 else
7065 {
7066 val = f->trampoff - roff;
7067 if (val >= max_branch_offset)
7068 continue;
7069
7070 /* Nop out the reloc, since we're finalizing things here. */
7071 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7072 }
7073
7074 /* Get the section contents. */
7075 if (contents == NULL)
7076 {
7077 /* Get cached copy if it exists. */
7078 if (elf_section_data (isec)->this_hdr.contents != NULL)
7079 contents = elf_section_data (isec)->this_hdr.contents;
7080 /* Go get them off disk. */
7081 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7082 goto error_return;
7083 }
7084
7085 /* Fix up the existing branch to hit the trampoline. */
7086 hit_addr = contents + roff;
7087 switch (r_type)
7088 {
7089 case R_PPC_REL24:
7090 case R_PPC_LOCAL24PC:
7091 case R_PPC_PLTREL24:
7092 t0 = bfd_get_32 (abfd, hit_addr);
7093 t0 &= ~0x3fffffc;
7094 t0 |= val & 0x3fffffc;
7095 bfd_put_32 (abfd, t0, hit_addr);
7096 break;
7097
7098 case R_PPC_REL14:
7099 case R_PPC_REL14_BRTAKEN:
7100 case R_PPC_REL14_BRNTAKEN:
7101 t0 = bfd_get_32 (abfd, hit_addr);
7102 t0 &= ~0xfffc;
7103 t0 |= val & 0xfffc;
7104 bfd_put_32 (abfd, t0, hit_addr);
7105 break;
7106 }
7107 }
7108
7109 while (fixups != NULL)
7110 {
7111 struct one_fixup *f = fixups;
7112 fixups = fixups->next;
7113 free (f);
7114 }
7115 }
7116
7117 workaround_change = FALSE;
7118 newsize = trampoff;
7119 if (htab->params->ppc476_workaround
7120 && (!link_info->relocatable
7121 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7122 {
7123 bfd_vma addr, end_addr;
7124 unsigned int crossings;
7125 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7126
7127 addr = isec->output_section->vma + isec->output_offset;
7128 end_addr = addr + trampoff - 1;
7129 addr &= -pagesize;
7130 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7131 if (crossings != 0)
7132 {
7133 /* Keep space aligned, to ensure the patch code itself does
7134 not cross a page. Don't decrease size calculated on a
7135 previous pass as otherwise we might never settle on a layout. */
7136 newsize = 15 - (end_addr & 15);
7137 newsize += crossings * 16;
7138 if (relax_info->workaround_size < newsize)
7139 {
7140 relax_info->workaround_size = newsize;
7141 workaround_change = TRUE;
7142 }
7143 /* Ensure relocate_section is called. */
7144 isec->flags |= SEC_RELOC;
7145 }
7146 newsize = trampoff + relax_info->workaround_size;
7147 }
7148
7149 if (changes || workaround_change)
7150 isec->size = newsize;
7151
7152 if (isymbuf != NULL
7153 && symtab_hdr->contents != (unsigned char *) isymbuf)
7154 {
7155 if (! link_info->keep_memory)
7156 free (isymbuf);
7157 else
7158 {
7159 /* Cache the symbols for elf_link_input_bfd. */
7160 symtab_hdr->contents = (unsigned char *) isymbuf;
7161 }
7162 }
7163
7164 if (contents != NULL
7165 && elf_section_data (isec)->this_hdr.contents != contents)
7166 {
7167 if (!changes && !link_info->keep_memory)
7168 free (contents);
7169 else
7170 {
7171 /* Cache the section contents for elf_link_input_bfd. */
7172 elf_section_data (isec)->this_hdr.contents = contents;
7173 }
7174 }
7175
7176 if (changes != 0)
7177 {
7178 /* Append sufficient NOP relocs so we can write out relocation
7179 information for the trampolines. */
7180 Elf_Internal_Shdr *rel_hdr;
7181 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7182 * sizeof (*new_relocs));
7183 unsigned ix;
7184
7185 if (!new_relocs)
7186 goto error_return;
7187 memcpy (new_relocs, internal_relocs,
7188 isec->reloc_count * sizeof (*new_relocs));
7189 for (ix = changes; ix--;)
7190 {
7191 irel = new_relocs + ix + isec->reloc_count;
7192
7193 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7194 }
7195 if (internal_relocs != elf_section_data (isec)->relocs)
7196 free (internal_relocs);
7197 elf_section_data (isec)->relocs = new_relocs;
7198 isec->reloc_count += changes;
7199 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7200 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7201 }
7202 else if (internal_relocs != NULL
7203 && elf_section_data (isec)->relocs != internal_relocs)
7204 free (internal_relocs);
7205
7206 *again = changes != 0 || workaround_change;
7207 return TRUE;
7208
7209 error_return:
7210 while (fixups != NULL)
7211 {
7212 struct one_fixup *f = fixups;
7213 fixups = fixups->next;
7214 free (f);
7215 }
7216 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7217 free (isymbuf);
7218 if (contents != NULL
7219 && elf_section_data (isec)->this_hdr.contents != contents)
7220 free (contents);
7221 if (internal_relocs != NULL
7222 && elf_section_data (isec)->relocs != internal_relocs)
7223 free (internal_relocs);
7224 return FALSE;
7225 }
7226 \f
7227 /* What to do when ld finds relocations against symbols defined in
7228 discarded sections. */
7229
7230 static unsigned int
7231 ppc_elf_action_discarded (asection *sec)
7232 {
7233 if (strcmp (".fixup", sec->name) == 0)
7234 return 0;
7235
7236 if (strcmp (".got2", sec->name) == 0)
7237 return 0;
7238
7239 return _bfd_elf_default_action_discarded (sec);
7240 }
7241 \f
7242 /* Fill in the address for a pointer generated in a linker section. */
7243
7244 static bfd_vma
7245 elf_finish_pointer_linker_section (bfd *input_bfd,
7246 elf_linker_section_t *lsect,
7247 struct elf_link_hash_entry *h,
7248 bfd_vma relocation,
7249 const Elf_Internal_Rela *rel)
7250 {
7251 elf_linker_section_pointers_t *linker_section_ptr;
7252
7253 BFD_ASSERT (lsect != NULL);
7254
7255 if (h != NULL)
7256 {
7257 /* Handle global symbol. */
7258 struct ppc_elf_link_hash_entry *eh;
7259
7260 eh = (struct ppc_elf_link_hash_entry *) h;
7261 BFD_ASSERT (eh->elf.def_regular);
7262 linker_section_ptr = eh->linker_section_pointer;
7263 }
7264 else
7265 {
7266 /* Handle local symbol. */
7267 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7268
7269 BFD_ASSERT (is_ppc_elf (input_bfd));
7270 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7271 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7272 }
7273
7274 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7275 rel->r_addend,
7276 lsect);
7277 BFD_ASSERT (linker_section_ptr != NULL);
7278
7279 /* Offset will always be a multiple of four, so use the bottom bit
7280 as a "written" flag. */
7281 if ((linker_section_ptr->offset & 1) == 0)
7282 {
7283 bfd_put_32 (lsect->section->owner,
7284 relocation + linker_section_ptr->addend,
7285 lsect->section->contents + linker_section_ptr->offset);
7286 linker_section_ptr->offset += 1;
7287 }
7288
7289 relocation = (lsect->section->output_section->vma
7290 + lsect->section->output_offset
7291 + linker_section_ptr->offset - 1
7292 - SYM_VAL (lsect->sym));
7293
7294 #ifdef DEBUG
7295 fprintf (stderr,
7296 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7297 lsect->name, (long) relocation, (long) relocation);
7298 #endif
7299
7300 return relocation;
7301 }
7302
7303 #define PPC_LO(v) ((v) & 0xffff)
7304 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7305 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7306
7307 static void
7308 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7309 struct bfd_link_info *info)
7310 {
7311 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7312 bfd *output_bfd = info->output_bfd;
7313 bfd_vma plt;
7314
7315 plt = ((ent->plt.offset & ~1)
7316 + plt_sec->output_section->vma
7317 + plt_sec->output_offset);
7318
7319 if (info->shared)
7320 {
7321 bfd_vma got = 0;
7322
7323 if (ent->addend >= 32768)
7324 got = (ent->addend
7325 + ent->sec->output_section->vma
7326 + ent->sec->output_offset);
7327 else if (htab->elf.hgot != NULL)
7328 got = SYM_VAL (htab->elf.hgot);
7329
7330 plt -= got;
7331
7332 if (plt + 0x8000 < 0x10000)
7333 {
7334 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7335 p += 4;
7336 bfd_put_32 (output_bfd, MTCTR_11, p);
7337 p += 4;
7338 bfd_put_32 (output_bfd, BCTR, p);
7339 p += 4;
7340 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7341 p += 4;
7342 }
7343 else
7344 {
7345 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7346 p += 4;
7347 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7348 p += 4;
7349 bfd_put_32 (output_bfd, MTCTR_11, p);
7350 p += 4;
7351 bfd_put_32 (output_bfd, BCTR, p);
7352 p += 4;
7353 }
7354 }
7355 else
7356 {
7357 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7358 p += 4;
7359 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7360 p += 4;
7361 bfd_put_32 (output_bfd, MTCTR_11, p);
7362 p += 4;
7363 bfd_put_32 (output_bfd, BCTR, p);
7364 p += 4;
7365 }
7366 }
7367
7368 /* Return true if symbol is defined statically. */
7369
7370 static bfd_boolean
7371 is_static_defined (struct elf_link_hash_entry *h)
7372 {
7373 return ((h->root.type == bfd_link_hash_defined
7374 || h->root.type == bfd_link_hash_defweak)
7375 && h->root.u.def.section != NULL
7376 && h->root.u.def.section->output_section != NULL);
7377 }
7378
7379 /* If INSN is an opcode that may be used with an @tls operand, return
7380 the transformed insn for TLS optimisation, otherwise return 0. If
7381 REG is non-zero only match an insn with RB or RA equal to REG. */
7382
7383 unsigned int
7384 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7385 {
7386 unsigned int rtra;
7387
7388 if ((insn & (0x3f << 26)) != 31 << 26)
7389 return 0;
7390
7391 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7392 rtra = insn & ((1 << 26) - (1 << 16));
7393 else if (((insn >> 16) & 0x1f) == reg)
7394 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7395 else
7396 return 0;
7397
7398 if ((insn & (0x3ff << 1)) == 266 << 1)
7399 /* add -> addi. */
7400 insn = 14 << 26;
7401 else if ((insn & (0x1f << 1)) == 23 << 1
7402 && ((insn & (0x1f << 6)) < 14 << 6
7403 || ((insn & (0x1f << 6)) >= 16 << 6
7404 && (insn & (0x1f << 6)) < 24 << 6)))
7405 /* load and store indexed -> dform. */
7406 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7407 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7408 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7409 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7410 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7411 /* lwax -> lwa. */
7412 insn = (58 << 26) | 2;
7413 else
7414 return 0;
7415 insn |= rtra;
7416 return insn;
7417 }
7418
7419 /* If INSN is an opcode that may be used with an @tprel operand, return
7420 the transformed insn for an undefined weak symbol, ie. with the
7421 thread pointer REG operand removed. Otherwise return 0. */
7422
7423 unsigned int
7424 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7425 {
7426 if ((insn & (0x1f << 16)) == reg << 16
7427 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7428 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7429 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7430 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7431 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7432 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7433 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7434 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7435 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7436 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7437 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7438 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7439 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7440 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7441 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7442 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7443 && (insn & 3) != 1)
7444 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7445 && ((insn & 3) == 0 || (insn & 3) == 3))))
7446 {
7447 insn &= ~(0x1f << 16);
7448 }
7449 else if ((insn & (0x1f << 21)) == reg << 21
7450 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7451 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7452 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7453 {
7454 insn &= ~(0x1f << 21);
7455 insn |= (insn & (0x1f << 16)) << 5;
7456 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7457 insn -= 2 >> 26; /* convert to ori,oris */
7458 }
7459 else
7460 insn = 0;
7461 return insn;
7462 }
7463
7464 static bfd_boolean
7465 is_insn_ds_form (unsigned int insn)
7466 {
7467 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7468 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7469 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7470 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7471 }
7472
7473 static bfd_boolean
7474 is_insn_dq_form (unsigned int insn)
7475 {
7476 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7477 }
7478
7479 /* The RELOCATE_SECTION function is called by the ELF backend linker
7480 to handle the relocations for a section.
7481
7482 The relocs are always passed as Rela structures; if the section
7483 actually uses Rel structures, the r_addend field will always be
7484 zero.
7485
7486 This function is responsible for adjust the section contents as
7487 necessary, and (if using Rela relocs and generating a
7488 relocatable output file) adjusting the reloc addend as
7489 necessary.
7490
7491 This function does not have to worry about setting the reloc
7492 address or the reloc symbol index.
7493
7494 LOCAL_SYMS is a pointer to the swapped in local symbols.
7495
7496 LOCAL_SECTIONS is an array giving the section in the input file
7497 corresponding to the st_shndx field of each local symbol.
7498
7499 The global hash table entry for the global symbols can be found
7500 via elf_sym_hashes (input_bfd).
7501
7502 When generating relocatable output, this function must handle
7503 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7504 going to be the section symbol corresponding to the output
7505 section, which means that the addend must be adjusted
7506 accordingly. */
7507
7508 static bfd_boolean
7509 ppc_elf_relocate_section (bfd *output_bfd,
7510 struct bfd_link_info *info,
7511 bfd *input_bfd,
7512 asection *input_section,
7513 bfd_byte *contents,
7514 Elf_Internal_Rela *relocs,
7515 Elf_Internal_Sym *local_syms,
7516 asection **local_sections)
7517 {
7518 Elf_Internal_Shdr *symtab_hdr;
7519 struct elf_link_hash_entry **sym_hashes;
7520 struct ppc_elf_link_hash_table *htab;
7521 Elf_Internal_Rela *rel;
7522 Elf_Internal_Rela *relend;
7523 Elf_Internal_Rela outrel;
7524 asection *got2;
7525 bfd_vma *local_got_offsets;
7526 bfd_boolean ret = TRUE;
7527 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7528 bfd_boolean is_vxworks_tls;
7529
7530 #ifdef DEBUG
7531 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7532 "%ld relocations%s",
7533 input_bfd, input_section,
7534 (long) input_section->reloc_count,
7535 (info->relocatable) ? " (relocatable)" : "");
7536 #endif
7537
7538 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7539
7540 /* Initialize howto table if not already done. */
7541 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7542 ppc_elf_howto_init ();
7543
7544 htab = ppc_elf_hash_table (info);
7545 local_got_offsets = elf_local_got_offsets (input_bfd);
7546 symtab_hdr = &elf_symtab_hdr (input_bfd);
7547 sym_hashes = elf_sym_hashes (input_bfd);
7548 /* We have to handle relocations in vxworks .tls_vars sections
7549 specially, because the dynamic loader is 'weird'. */
7550 is_vxworks_tls = (htab->is_vxworks && info->shared
7551 && !strcmp (input_section->output_section->name,
7552 ".tls_vars"));
7553 rel = relocs;
7554 relend = relocs + input_section->reloc_count;
7555 for (; rel < relend; rel++)
7556 {
7557 enum elf_ppc_reloc_type r_type;
7558 bfd_vma addend;
7559 bfd_reloc_status_type r;
7560 Elf_Internal_Sym *sym;
7561 asection *sec;
7562 struct elf_link_hash_entry *h;
7563 const char *sym_name;
7564 reloc_howto_type *howto;
7565 unsigned long r_symndx;
7566 bfd_vma relocation;
7567 bfd_vma branch_bit, from;
7568 bfd_boolean unresolved_reloc;
7569 bfd_boolean warned;
7570 unsigned int tls_type, tls_mask, tls_gd;
7571 struct plt_entry **ifunc;
7572 struct reloc_howto_struct alt_howto;
7573
7574 r_type = ELF32_R_TYPE (rel->r_info);
7575 sym = NULL;
7576 sec = NULL;
7577 h = NULL;
7578 unresolved_reloc = FALSE;
7579 warned = FALSE;
7580 r_symndx = ELF32_R_SYM (rel->r_info);
7581
7582 if (r_symndx < symtab_hdr->sh_info)
7583 {
7584 sym = local_syms + r_symndx;
7585 sec = local_sections[r_symndx];
7586 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7587
7588 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7589 }
7590 else
7591 {
7592 bfd_boolean ignored;
7593
7594 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7595 r_symndx, symtab_hdr, sym_hashes,
7596 h, sec, relocation,
7597 unresolved_reloc, warned, ignored);
7598
7599 sym_name = h->root.root.string;
7600 }
7601
7602 if (sec != NULL && discarded_section (sec))
7603 {
7604 /* For relocs against symbols from removed linkonce sections,
7605 or sections discarded by a linker script, we just want the
7606 section contents zeroed. Avoid any special processing. */
7607 howto = NULL;
7608 if (r_type < R_PPC_max)
7609 howto = ppc_elf_howto_table[r_type];
7610 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7611 rel, 1, relend, howto, 0, contents);
7612 }
7613
7614 if (info->relocatable)
7615 {
7616 if (got2 != NULL
7617 && r_type == R_PPC_PLTREL24
7618 && rel->r_addend != 0)
7619 {
7620 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7621 addend specifies the GOT pointer offset within .got2. */
7622 rel->r_addend += got2->output_offset;
7623 }
7624 if (r_type != R_PPC_RELAX_PLT
7625 && r_type != R_PPC_RELAX_PLTREL24
7626 && r_type != R_PPC_RELAX)
7627 continue;
7628 }
7629
7630 /* TLS optimizations. Replace instruction sequences and relocs
7631 based on information we collected in tls_optimize. We edit
7632 RELOCS so that --emit-relocs will output something sensible
7633 for the final instruction stream. */
7634 tls_mask = 0;
7635 tls_gd = 0;
7636 if (h != NULL)
7637 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7638 else if (local_got_offsets != NULL)
7639 {
7640 struct plt_entry **local_plt;
7641 char *lgot_masks;
7642 local_plt
7643 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7644 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7645 tls_mask = lgot_masks[r_symndx];
7646 }
7647
7648 /* Ensure reloc mapping code below stays sane. */
7649 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7650 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7651 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7652 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7653 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7654 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7655 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7656 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7657 abort ();
7658 switch (r_type)
7659 {
7660 default:
7661 break;
7662
7663 case R_PPC_GOT_TPREL16:
7664 case R_PPC_GOT_TPREL16_LO:
7665 if ((tls_mask & TLS_TLS) != 0
7666 && (tls_mask & TLS_TPREL) == 0)
7667 {
7668 bfd_vma insn;
7669
7670 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7671 insn &= 31 << 21;
7672 insn |= 0x3c020000; /* addis 0,2,0 */
7673 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7674 r_type = R_PPC_TPREL16_HA;
7675 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7676 }
7677 break;
7678
7679 case R_PPC_TLS:
7680 if ((tls_mask & TLS_TLS) != 0
7681 && (tls_mask & TLS_TPREL) == 0)
7682 {
7683 bfd_vma insn;
7684
7685 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7686 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7687 if (insn == 0)
7688 abort ();
7689 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7690 r_type = R_PPC_TPREL16_LO;
7691 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7692
7693 /* Was PPC_TLS which sits on insn boundary, now
7694 PPC_TPREL16_LO which is at low-order half-word. */
7695 rel->r_offset += d_offset;
7696 }
7697 break;
7698
7699 case R_PPC_GOT_TLSGD16_HI:
7700 case R_PPC_GOT_TLSGD16_HA:
7701 tls_gd = TLS_TPRELGD;
7702 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7703 goto tls_gdld_hi;
7704 break;
7705
7706 case R_PPC_GOT_TLSLD16_HI:
7707 case R_PPC_GOT_TLSLD16_HA:
7708 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7709 {
7710 tls_gdld_hi:
7711 if ((tls_mask & tls_gd) != 0)
7712 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7713 + R_PPC_GOT_TPREL16);
7714 else
7715 {
7716 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7717 rel->r_offset -= d_offset;
7718 r_type = R_PPC_NONE;
7719 }
7720 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7721 }
7722 break;
7723
7724 case R_PPC_GOT_TLSGD16:
7725 case R_PPC_GOT_TLSGD16_LO:
7726 tls_gd = TLS_TPRELGD;
7727 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7728 goto tls_ldgd_opt;
7729 break;
7730
7731 case R_PPC_GOT_TLSLD16:
7732 case R_PPC_GOT_TLSLD16_LO:
7733 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7734 {
7735 unsigned int insn1, insn2;
7736 bfd_vma offset;
7737
7738 tls_ldgd_opt:
7739 offset = (bfd_vma) -1;
7740 /* If not using the newer R_PPC_TLSGD/LD to mark
7741 __tls_get_addr calls, we must trust that the call
7742 stays with its arg setup insns, ie. that the next
7743 reloc is the __tls_get_addr call associated with
7744 the current reloc. Edit both insns. */
7745 if (input_section->has_tls_get_addr_call
7746 && rel + 1 < relend
7747 && branch_reloc_hash_match (input_bfd, rel + 1,
7748 htab->tls_get_addr))
7749 offset = rel[1].r_offset;
7750 if ((tls_mask & tls_gd) != 0)
7751 {
7752 /* IE */
7753 insn1 = bfd_get_32 (output_bfd,
7754 contents + rel->r_offset - d_offset);
7755 insn1 &= (1 << 26) - 1;
7756 insn1 |= 32 << 26; /* lwz */
7757 if (offset != (bfd_vma) -1)
7758 {
7759 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7760 insn2 = 0x7c631214; /* add 3,3,2 */
7761 bfd_put_32 (output_bfd, insn2, contents + offset);
7762 }
7763 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7764 + R_PPC_GOT_TPREL16);
7765 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7766 }
7767 else
7768 {
7769 /* LE */
7770 insn1 = 0x3c620000; /* addis 3,2,0 */
7771 if (tls_gd == 0)
7772 {
7773 /* Was an LD reloc. */
7774 for (r_symndx = 0;
7775 r_symndx < symtab_hdr->sh_info;
7776 r_symndx++)
7777 if (local_sections[r_symndx] == sec)
7778 break;
7779 if (r_symndx >= symtab_hdr->sh_info)
7780 r_symndx = STN_UNDEF;
7781 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7782 if (r_symndx != STN_UNDEF)
7783 rel->r_addend -= (local_syms[r_symndx].st_value
7784 + sec->output_offset
7785 + sec->output_section->vma);
7786 }
7787 r_type = R_PPC_TPREL16_HA;
7788 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7789 if (offset != (bfd_vma) -1)
7790 {
7791 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7792 rel[1].r_offset = offset + d_offset;
7793 rel[1].r_addend = rel->r_addend;
7794 insn2 = 0x38630000; /* addi 3,3,0 */
7795 bfd_put_32 (output_bfd, insn2, contents + offset);
7796 }
7797 }
7798 bfd_put_32 (output_bfd, insn1,
7799 contents + rel->r_offset - d_offset);
7800 if (tls_gd == 0)
7801 {
7802 /* We changed the symbol on an LD reloc. Start over
7803 in order to get h, sym, sec etc. right. */
7804 rel--;
7805 continue;
7806 }
7807 }
7808 break;
7809
7810 case R_PPC_TLSGD:
7811 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7812 {
7813 unsigned int insn2;
7814 bfd_vma offset = rel->r_offset;
7815
7816 if ((tls_mask & TLS_TPRELGD) != 0)
7817 {
7818 /* IE */
7819 r_type = R_PPC_NONE;
7820 insn2 = 0x7c631214; /* add 3,3,2 */
7821 }
7822 else
7823 {
7824 /* LE */
7825 r_type = R_PPC_TPREL16_LO;
7826 rel->r_offset += d_offset;
7827 insn2 = 0x38630000; /* addi 3,3,0 */
7828 }
7829 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7830 bfd_put_32 (output_bfd, insn2, contents + offset);
7831 /* Zap the reloc on the _tls_get_addr call too. */
7832 BFD_ASSERT (offset == rel[1].r_offset);
7833 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7834 }
7835 break;
7836
7837 case R_PPC_TLSLD:
7838 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7839 {
7840 unsigned int insn2;
7841
7842 for (r_symndx = 0;
7843 r_symndx < symtab_hdr->sh_info;
7844 r_symndx++)
7845 if (local_sections[r_symndx] == sec)
7846 break;
7847 if (r_symndx >= symtab_hdr->sh_info)
7848 r_symndx = STN_UNDEF;
7849 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7850 if (r_symndx != STN_UNDEF)
7851 rel->r_addend -= (local_syms[r_symndx].st_value
7852 + sec->output_offset
7853 + sec->output_section->vma);
7854
7855 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7856 rel->r_offset += d_offset;
7857 insn2 = 0x38630000; /* addi 3,3,0 */
7858 bfd_put_32 (output_bfd, insn2,
7859 contents + rel->r_offset - d_offset);
7860 /* Zap the reloc on the _tls_get_addr call too. */
7861 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7862 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7863 rel--;
7864 continue;
7865 }
7866 break;
7867 }
7868
7869 /* Handle other relocations that tweak non-addend part of insn. */
7870 branch_bit = 0;
7871 switch (r_type)
7872 {
7873 default:
7874 break;
7875
7876 /* Branch taken prediction relocations. */
7877 case R_PPC_ADDR14_BRTAKEN:
7878 case R_PPC_REL14_BRTAKEN:
7879 branch_bit = BRANCH_PREDICT_BIT;
7880 /* Fall thru */
7881
7882 /* Branch not taken prediction relocations. */
7883 case R_PPC_ADDR14_BRNTAKEN:
7884 case R_PPC_REL14_BRNTAKEN:
7885 {
7886 bfd_vma insn;
7887
7888 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7889 insn &= ~BRANCH_PREDICT_BIT;
7890 insn |= branch_bit;
7891
7892 from = (rel->r_offset
7893 + input_section->output_offset
7894 + input_section->output_section->vma);
7895
7896 /* Invert 'y' bit if not the default. */
7897 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7898 insn ^= BRANCH_PREDICT_BIT;
7899
7900 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7901 break;
7902 }
7903 }
7904
7905 ifunc = NULL;
7906 if (!htab->is_vxworks)
7907 {
7908 struct plt_entry *ent;
7909
7910 if (h != NULL)
7911 {
7912 if (h->type == STT_GNU_IFUNC)
7913 ifunc = &h->plt.plist;
7914 }
7915 else if (local_got_offsets != NULL
7916 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7917 {
7918 struct plt_entry **local_plt;
7919
7920 local_plt = (struct plt_entry **) (local_got_offsets
7921 + symtab_hdr->sh_info);
7922 ifunc = local_plt + r_symndx;
7923 }
7924
7925 ent = NULL;
7926 if (ifunc != NULL
7927 && (!info->shared
7928 || is_branch_reloc (r_type)))
7929 {
7930 addend = 0;
7931 if (r_type == R_PPC_PLTREL24 && info->shared)
7932 addend = rel->r_addend;
7933 ent = find_plt_ent (ifunc, got2, addend);
7934 }
7935 if (ent != NULL)
7936 {
7937 if (h == NULL && (ent->plt.offset & 1) == 0)
7938 {
7939 Elf_Internal_Rela rela;
7940 bfd_byte *loc;
7941
7942 rela.r_offset = (htab->iplt->output_section->vma
7943 + htab->iplt->output_offset
7944 + ent->plt.offset);
7945 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7946 rela.r_addend = relocation;
7947 loc = htab->reliplt->contents;
7948 loc += (htab->reliplt->reloc_count++
7949 * sizeof (Elf32_External_Rela));
7950 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7951
7952 ent->plt.offset |= 1;
7953 }
7954 if (h == NULL && (ent->glink_offset & 1) == 0)
7955 {
7956 unsigned char *p = ((unsigned char *) htab->glink->contents
7957 + ent->glink_offset);
7958 write_glink_stub (ent, htab->iplt, p, info);
7959 ent->glink_offset |= 1;
7960 }
7961
7962 unresolved_reloc = FALSE;
7963 if (htab->plt_type == PLT_NEW
7964 || !htab->elf.dynamic_sections_created
7965 || h == NULL
7966 || h->dynindx == -1)
7967 relocation = (htab->glink->output_section->vma
7968 + htab->glink->output_offset
7969 + (ent->glink_offset & ~1));
7970 else
7971 relocation = (htab->plt->output_section->vma
7972 + htab->plt->output_offset
7973 + ent->plt.offset);
7974 }
7975 }
7976
7977 addend = rel->r_addend;
7978 tls_type = 0;
7979 howto = NULL;
7980 if (r_type < R_PPC_max)
7981 howto = ppc_elf_howto_table[r_type];
7982 switch (r_type)
7983 {
7984 default:
7985 info->callbacks->einfo
7986 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7987 input_bfd, (int) r_type, sym_name);
7988
7989 bfd_set_error (bfd_error_bad_value);
7990 ret = FALSE;
7991 continue;
7992
7993 case R_PPC_NONE:
7994 case R_PPC_TLS:
7995 case R_PPC_TLSGD:
7996 case R_PPC_TLSLD:
7997 case R_PPC_EMB_MRKREF:
7998 case R_PPC_GNU_VTINHERIT:
7999 case R_PPC_GNU_VTENTRY:
8000 continue;
8001
8002 /* GOT16 relocations. Like an ADDR16 using the symbol's
8003 address in the GOT as relocation value instead of the
8004 symbol's value itself. Also, create a GOT entry for the
8005 symbol and put the symbol value there. */
8006 case R_PPC_GOT_TLSGD16:
8007 case R_PPC_GOT_TLSGD16_LO:
8008 case R_PPC_GOT_TLSGD16_HI:
8009 case R_PPC_GOT_TLSGD16_HA:
8010 tls_type = TLS_TLS | TLS_GD;
8011 goto dogot;
8012
8013 case R_PPC_GOT_TLSLD16:
8014 case R_PPC_GOT_TLSLD16_LO:
8015 case R_PPC_GOT_TLSLD16_HI:
8016 case R_PPC_GOT_TLSLD16_HA:
8017 tls_type = TLS_TLS | TLS_LD;
8018 goto dogot;
8019
8020 case R_PPC_GOT_TPREL16:
8021 case R_PPC_GOT_TPREL16_LO:
8022 case R_PPC_GOT_TPREL16_HI:
8023 case R_PPC_GOT_TPREL16_HA:
8024 tls_type = TLS_TLS | TLS_TPREL;
8025 goto dogot;
8026
8027 case R_PPC_GOT_DTPREL16:
8028 case R_PPC_GOT_DTPREL16_LO:
8029 case R_PPC_GOT_DTPREL16_HI:
8030 case R_PPC_GOT_DTPREL16_HA:
8031 tls_type = TLS_TLS | TLS_DTPREL;
8032 goto dogot;
8033
8034 case R_PPC_GOT16:
8035 case R_PPC_GOT16_LO:
8036 case R_PPC_GOT16_HI:
8037 case R_PPC_GOT16_HA:
8038 tls_mask = 0;
8039 dogot:
8040 {
8041 /* Relocation is to the entry for this symbol in the global
8042 offset table. */
8043 bfd_vma off;
8044 bfd_vma *offp;
8045 unsigned long indx;
8046
8047 if (htab->got == NULL)
8048 abort ();
8049
8050 indx = 0;
8051 if (tls_type == (TLS_TLS | TLS_LD)
8052 && (h == NULL
8053 || !h->def_dynamic))
8054 offp = &htab->tlsld_got.offset;
8055 else if (h != NULL)
8056 {
8057 bfd_boolean dyn;
8058 dyn = htab->elf.dynamic_sections_created;
8059 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8060 || (info->shared
8061 && SYMBOL_REFERENCES_LOCAL (info, h)))
8062 /* This is actually a static link, or it is a
8063 -Bsymbolic link and the symbol is defined
8064 locally, or the symbol was forced to be local
8065 because of a version file. */
8066 ;
8067 else
8068 {
8069 BFD_ASSERT (h->dynindx != -1);
8070 indx = h->dynindx;
8071 unresolved_reloc = FALSE;
8072 }
8073 offp = &h->got.offset;
8074 }
8075 else
8076 {
8077 if (local_got_offsets == NULL)
8078 abort ();
8079 offp = &local_got_offsets[r_symndx];
8080 }
8081
8082 /* The offset must always be a multiple of 4. We use the
8083 least significant bit to record whether we have already
8084 processed this entry. */
8085 off = *offp;
8086 if ((off & 1) != 0)
8087 off &= ~1;
8088 else
8089 {
8090 unsigned int tls_m = (tls_mask
8091 & (TLS_LD | TLS_GD | TLS_DTPREL
8092 | TLS_TPREL | TLS_TPRELGD));
8093
8094 if (offp == &htab->tlsld_got.offset)
8095 tls_m = TLS_LD;
8096 else if (h == NULL
8097 || !h->def_dynamic)
8098 tls_m &= ~TLS_LD;
8099
8100 /* We might have multiple got entries for this sym.
8101 Initialize them all. */
8102 do
8103 {
8104 int tls_ty = 0;
8105
8106 if ((tls_m & TLS_LD) != 0)
8107 {
8108 tls_ty = TLS_TLS | TLS_LD;
8109 tls_m &= ~TLS_LD;
8110 }
8111 else if ((tls_m & TLS_GD) != 0)
8112 {
8113 tls_ty = TLS_TLS | TLS_GD;
8114 tls_m &= ~TLS_GD;
8115 }
8116 else if ((tls_m & TLS_DTPREL) != 0)
8117 {
8118 tls_ty = TLS_TLS | TLS_DTPREL;
8119 tls_m &= ~TLS_DTPREL;
8120 }
8121 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8122 {
8123 tls_ty = TLS_TLS | TLS_TPREL;
8124 tls_m = 0;
8125 }
8126
8127 /* Generate relocs for the dynamic linker. */
8128 if ((info->shared || indx != 0)
8129 && (offp == &htab->tlsld_got.offset
8130 || h == NULL
8131 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8132 || h->root.type != bfd_link_hash_undefweak))
8133 {
8134 asection *rsec = htab->relgot;
8135 bfd_byte * loc;
8136
8137 if (ifunc != NULL)
8138 rsec = htab->reliplt;
8139 outrel.r_offset = (htab->got->output_section->vma
8140 + htab->got->output_offset
8141 + off);
8142 outrel.r_addend = 0;
8143 if (tls_ty & (TLS_LD | TLS_GD))
8144 {
8145 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8146 if (tls_ty == (TLS_TLS | TLS_GD))
8147 {
8148 loc = rsec->contents;
8149 loc += (rsec->reloc_count++
8150 * sizeof (Elf32_External_Rela));
8151 bfd_elf32_swap_reloca_out (output_bfd,
8152 &outrel, loc);
8153 outrel.r_offset += 4;
8154 outrel.r_info
8155 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8156 }
8157 }
8158 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8159 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8160 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8161 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8162 else if (indx != 0)
8163 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8164 else if (ifunc != NULL)
8165 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8166 else
8167 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8168 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8169 {
8170 outrel.r_addend += relocation;
8171 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8172 outrel.r_addend -= htab->elf.tls_sec->vma;
8173 }
8174 loc = rsec->contents;
8175 loc += (rsec->reloc_count++
8176 * sizeof (Elf32_External_Rela));
8177 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8178 }
8179
8180 /* Init the .got section contents if we're not
8181 emitting a reloc. */
8182 else
8183 {
8184 bfd_vma value = relocation;
8185
8186 if (tls_ty == (TLS_TLS | TLS_LD))
8187 value = 1;
8188 else if (tls_ty != 0)
8189 {
8190 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8191 if (tls_ty == (TLS_TLS | TLS_TPREL))
8192 value += DTP_OFFSET - TP_OFFSET;
8193
8194 if (tls_ty == (TLS_TLS | TLS_GD))
8195 {
8196 bfd_put_32 (output_bfd, value,
8197 htab->got->contents + off + 4);
8198 value = 1;
8199 }
8200 }
8201 bfd_put_32 (output_bfd, value,
8202 htab->got->contents + off);
8203 }
8204
8205 off += 4;
8206 if (tls_ty & (TLS_LD | TLS_GD))
8207 off += 4;
8208 }
8209 while (tls_m != 0);
8210
8211 off = *offp;
8212 *offp = off | 1;
8213 }
8214
8215 if (off >= (bfd_vma) -2)
8216 abort ();
8217
8218 if ((tls_type & TLS_TLS) != 0)
8219 {
8220 if (tls_type != (TLS_TLS | TLS_LD))
8221 {
8222 if ((tls_mask & TLS_LD) != 0
8223 && !(h == NULL
8224 || !h->def_dynamic))
8225 off += 8;
8226 if (tls_type != (TLS_TLS | TLS_GD))
8227 {
8228 if ((tls_mask & TLS_GD) != 0)
8229 off += 8;
8230 if (tls_type != (TLS_TLS | TLS_DTPREL))
8231 {
8232 if ((tls_mask & TLS_DTPREL) != 0)
8233 off += 4;
8234 }
8235 }
8236 }
8237 }
8238
8239 relocation = (htab->got->output_section->vma
8240 + htab->got->output_offset
8241 + off
8242 - SYM_VAL (htab->elf.hgot));
8243
8244 /* Addends on got relocations don't make much sense.
8245 x+off@got is actually x@got+off, and since the got is
8246 generated by a hash table traversal, the value in the
8247 got at entry m+n bears little relation to the entry m. */
8248 if (addend != 0)
8249 info->callbacks->einfo
8250 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8251 input_bfd, input_section, rel->r_offset,
8252 howto->name,
8253 sym_name);
8254 }
8255 break;
8256
8257 /* Relocations that need no special processing. */
8258 case R_PPC_LOCAL24PC:
8259 /* It makes no sense to point a local relocation
8260 at a symbol not in this object. */
8261 if (unresolved_reloc)
8262 {
8263 if (! (*info->callbacks->undefined_symbol) (info,
8264 h->root.root.string,
8265 input_bfd,
8266 input_section,
8267 rel->r_offset,
8268 TRUE))
8269 return FALSE;
8270 continue;
8271 }
8272 break;
8273
8274 case R_PPC_DTPREL16:
8275 case R_PPC_DTPREL16_LO:
8276 case R_PPC_DTPREL16_HI:
8277 case R_PPC_DTPREL16_HA:
8278 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8279 break;
8280
8281 /* Relocations that may need to be propagated if this is a shared
8282 object. */
8283 case R_PPC_TPREL16:
8284 case R_PPC_TPREL16_LO:
8285 case R_PPC_TPREL16_HI:
8286 case R_PPC_TPREL16_HA:
8287 if (h != NULL
8288 && h->root.type == bfd_link_hash_undefweak
8289 && h->dynindx == -1)
8290 {
8291 /* Make this relocation against an undefined weak symbol
8292 resolve to zero. This is really just a tweak, since
8293 code using weak externs ought to check that they are
8294 defined before using them. */
8295 bfd_byte *p = contents + rel->r_offset - d_offset;
8296 unsigned int insn = bfd_get_32 (output_bfd, p);
8297 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8298 if (insn != 0)
8299 bfd_put_32 (output_bfd, insn, p);
8300 break;
8301 }
8302 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8303 /* The TPREL16 relocs shouldn't really be used in shared
8304 libs as they will result in DT_TEXTREL being set, but
8305 support them anyway. */
8306 goto dodyn;
8307
8308 case R_PPC_TPREL32:
8309 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8310 goto dodyn;
8311
8312 case R_PPC_DTPREL32:
8313 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8314 goto dodyn;
8315
8316 case R_PPC_DTPMOD32:
8317 relocation = 1;
8318 addend = 0;
8319 goto dodyn;
8320
8321 case R_PPC_REL16:
8322 case R_PPC_REL16_LO:
8323 case R_PPC_REL16_HI:
8324 case R_PPC_REL16_HA:
8325 break;
8326
8327 case R_PPC_REL32:
8328 if (h == NULL || h == htab->elf.hgot)
8329 break;
8330 /* fall through */
8331
8332 case R_PPC_ADDR32:
8333 case R_PPC_ADDR16:
8334 case R_PPC_ADDR16_LO:
8335 case R_PPC_ADDR16_HI:
8336 case R_PPC_ADDR16_HA:
8337 case R_PPC_UADDR32:
8338 case R_PPC_UADDR16:
8339 goto dodyn;
8340
8341 case R_PPC_VLE_REL8:
8342 case R_PPC_VLE_REL15:
8343 case R_PPC_VLE_REL24:
8344 case R_PPC_REL24:
8345 case R_PPC_REL14:
8346 case R_PPC_REL14_BRTAKEN:
8347 case R_PPC_REL14_BRNTAKEN:
8348 /* If these relocations are not to a named symbol, they can be
8349 handled right here, no need to bother the dynamic linker. */
8350 if (SYMBOL_CALLS_LOCAL (info, h)
8351 || h == htab->elf.hgot)
8352 break;
8353 /* fall through */
8354
8355 case R_PPC_ADDR24:
8356 case R_PPC_ADDR14:
8357 case R_PPC_ADDR14_BRTAKEN:
8358 case R_PPC_ADDR14_BRNTAKEN:
8359 if (h != NULL && !info->shared)
8360 break;
8361 /* fall through */
8362
8363 dodyn:
8364 if ((input_section->flags & SEC_ALLOC) == 0
8365 || is_vxworks_tls)
8366 break;
8367
8368 if ((info->shared
8369 && !(h != NULL
8370 && ((h->root.type == bfd_link_hash_undefined
8371 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8372 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8373 || (h->root.type == bfd_link_hash_undefweak
8374 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8375 && (must_be_dyn_reloc (info, r_type)
8376 || !SYMBOL_CALLS_LOCAL (info, h)))
8377 || (ELIMINATE_COPY_RELOCS
8378 && !info->shared
8379 && h != NULL
8380 && h->dynindx != -1
8381 && !h->non_got_ref
8382 && !h->def_regular))
8383 {
8384 int skip;
8385 bfd_byte *loc;
8386 asection *sreloc;
8387 #ifdef DEBUG
8388 fprintf (stderr, "ppc_elf_relocate_section needs to "
8389 "create relocation for %s\n",
8390 (h && h->root.root.string
8391 ? h->root.root.string : "<unknown>"));
8392 #endif
8393
8394 /* When generating a shared object, these relocations
8395 are copied into the output file to be resolved at run
8396 time. */
8397 sreloc = elf_section_data (input_section)->sreloc;
8398 if (ifunc)
8399 sreloc = htab->reliplt;
8400 if (sreloc == NULL)
8401 return FALSE;
8402
8403 skip = 0;
8404 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8405 input_section,
8406 rel->r_offset);
8407 if (outrel.r_offset == (bfd_vma) -1
8408 || outrel.r_offset == (bfd_vma) -2)
8409 skip = (int) outrel.r_offset;
8410 outrel.r_offset += (input_section->output_section->vma
8411 + input_section->output_offset);
8412
8413 if (skip)
8414 memset (&outrel, 0, sizeof outrel);
8415 else if ((h != NULL
8416 && (h->root.type == bfd_link_hash_undefined
8417 || h->root.type == bfd_link_hash_undefweak))
8418 || !SYMBOL_REFERENCES_LOCAL (info, h))
8419 {
8420 BFD_ASSERT (h->dynindx != -1);
8421 unresolved_reloc = FALSE;
8422 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8423 outrel.r_addend = rel->r_addend;
8424 }
8425 else
8426 {
8427 outrel.r_addend = relocation + rel->r_addend;
8428
8429 if (r_type != R_PPC_ADDR32)
8430 {
8431 long indx = 0;
8432
8433 if (ifunc != NULL)
8434 {
8435 /* If we get here when building a static
8436 executable, then the libc startup function
8437 responsible for applying indirect function
8438 relocations is going to complain about
8439 the reloc type.
8440 If we get here when building a dynamic
8441 executable, it will be because we have
8442 a text relocation. The dynamic loader
8443 will set the text segment writable and
8444 non-executable to apply text relocations.
8445 So we'll segfault when trying to run the
8446 indirection function to resolve the reloc. */
8447 info->callbacks->einfo
8448 (_("%P: %H: relocation %s for indirect "
8449 "function %s unsupported\n"),
8450 input_bfd, input_section, rel->r_offset,
8451 howto->name,
8452 sym_name);
8453 ret = FALSE;
8454 }
8455 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8456 ;
8457 else if (sec == NULL || sec->owner == NULL)
8458 {
8459 bfd_set_error (bfd_error_bad_value);
8460 ret = FALSE;
8461 }
8462 else
8463 {
8464 asection *osec;
8465
8466 /* We are turning this relocation into one
8467 against a section symbol. It would be
8468 proper to subtract the symbol's value,
8469 osec->vma, from the emitted reloc addend,
8470 but ld.so expects buggy relocs.
8471 FIXME: Why not always use a zero index? */
8472 osec = sec->output_section;
8473 indx = elf_section_data (osec)->dynindx;
8474 if (indx == 0)
8475 {
8476 osec = htab->elf.text_index_section;
8477 indx = elf_section_data (osec)->dynindx;
8478 }
8479 BFD_ASSERT (indx != 0);
8480 #ifdef DEBUG
8481 if (indx == 0)
8482 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8483 indx, osec->name, osec->flags,
8484 h->root.root.string);
8485 #endif
8486 }
8487
8488 outrel.r_info = ELF32_R_INFO (indx, r_type);
8489 }
8490 else if (ifunc != NULL)
8491 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8492 else
8493 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8494 }
8495
8496 loc = sreloc->contents;
8497 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8498 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8499
8500 if (skip == -1)
8501 continue;
8502
8503 /* This reloc will be computed at runtime. We clear the memory
8504 so that it contains predictable value. */
8505 if (! skip
8506 && ((input_section->flags & SEC_ALLOC) != 0
8507 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8508 {
8509 relocation = howto->pc_relative ? outrel.r_offset : 0;
8510 addend = 0;
8511 break;
8512 }
8513 }
8514 break;
8515
8516 case R_PPC_RELAX_PLT:
8517 case R_PPC_RELAX_PLTREL24:
8518 if (h != NULL)
8519 {
8520 struct plt_entry *ent;
8521 bfd_vma got2_addend = 0;
8522
8523 if (r_type == R_PPC_RELAX_PLTREL24)
8524 {
8525 if (info->shared)
8526 got2_addend = addend;
8527 addend = 0;
8528 }
8529 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8530 if (htab->plt_type == PLT_NEW)
8531 relocation = (htab->glink->output_section->vma
8532 + htab->glink->output_offset
8533 + ent->glink_offset);
8534 else
8535 relocation = (htab->plt->output_section->vma
8536 + htab->plt->output_offset
8537 + ent->plt.offset);
8538 }
8539 /* Fall thru */
8540
8541 case R_PPC_RELAX:
8542 {
8543 const int *stub;
8544 size_t size;
8545 size_t insn_offset = rel->r_offset;
8546 unsigned int insn;
8547
8548 if (info->shared)
8549 {
8550 relocation -= (input_section->output_section->vma
8551 + input_section->output_offset
8552 + rel->r_offset - 4);
8553 stub = shared_stub_entry;
8554 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8555 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8556 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8557 stub += 3;
8558 size = ARRAY_SIZE (shared_stub_entry) - 3;
8559 }
8560 else
8561 {
8562 stub = stub_entry;
8563 size = ARRAY_SIZE (stub_entry);
8564 }
8565
8566 relocation += addend;
8567 if (info->relocatable)
8568 relocation = 0;
8569
8570 /* First insn is HA, second is LO. */
8571 insn = *stub++;
8572 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8573 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8574 insn_offset += 4;
8575
8576 insn = *stub++;
8577 insn |= relocation & 0xffff;
8578 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8579 insn_offset += 4;
8580 size -= 2;
8581
8582 while (size != 0)
8583 {
8584 insn = *stub++;
8585 --size;
8586 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8587 insn_offset += 4;
8588 }
8589
8590 /* Rewrite the reloc and convert one of the trailing nop
8591 relocs to describe this relocation. */
8592 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8593 /* The relocs are at the bottom 2 bytes */
8594 rel[0].r_offset += d_offset;
8595 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8596 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8597 rel[1].r_offset += 4;
8598 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8599 rel++;
8600 }
8601 continue;
8602
8603 /* Indirect .sdata relocation. */
8604 case R_PPC_EMB_SDAI16:
8605 BFD_ASSERT (htab->sdata[0].section != NULL);
8606 if (!is_static_defined (htab->sdata[0].sym))
8607 {
8608 unresolved_reloc = TRUE;
8609 break;
8610 }
8611 relocation
8612 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8613 h, relocation, rel);
8614 addend = 0;
8615 break;
8616
8617 /* Indirect .sdata2 relocation. */
8618 case R_PPC_EMB_SDA2I16:
8619 BFD_ASSERT (htab->sdata[1].section != NULL);
8620 if (!is_static_defined (htab->sdata[1].sym))
8621 {
8622 unresolved_reloc = TRUE;
8623 break;
8624 }
8625 relocation
8626 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8627 h, relocation, rel);
8628 addend = 0;
8629 break;
8630
8631 /* Handle the TOC16 reloc. We want to use the offset within the .got
8632 section, not the actual VMA. This is appropriate when generating
8633 an embedded ELF object, for which the .got section acts like the
8634 AIX .toc section. */
8635 case R_PPC_TOC16: /* phony GOT16 relocations */
8636 if (sec == NULL || sec->output_section == NULL)
8637 {
8638 unresolved_reloc = TRUE;
8639 break;
8640 }
8641 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8642 ".got") == 0
8643 || strcmp (bfd_get_section_name (sec->owner, sec),
8644 ".cgot") == 0);
8645
8646 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8647 break;
8648
8649 case R_PPC_PLTREL24:
8650 if (h != NULL && ifunc == NULL)
8651 {
8652 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8653 info->shared ? addend : 0);
8654 if (ent == NULL
8655 || htab->plt == NULL)
8656 {
8657 /* We didn't make a PLT entry for this symbol. This
8658 happens when statically linking PIC code, or when
8659 using -Bsymbolic. */
8660 }
8661 else
8662 {
8663 /* Relocation is to the entry for this symbol in the
8664 procedure linkage table. */
8665 unresolved_reloc = FALSE;
8666 if (htab->plt_type == PLT_NEW)
8667 relocation = (htab->glink->output_section->vma
8668 + htab->glink->output_offset
8669 + ent->glink_offset);
8670 else
8671 relocation = (htab->plt->output_section->vma
8672 + htab->plt->output_offset
8673 + ent->plt.offset);
8674 }
8675 }
8676
8677 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8678 addend specifies the GOT pointer offset within .got2.
8679 Don't apply it to the relocation field. */
8680 addend = 0;
8681 break;
8682
8683 /* Relocate against _SDA_BASE_. */
8684 case R_PPC_SDAREL16:
8685 {
8686 const char *name;
8687 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8688
8689 if (sec == NULL
8690 || sec->output_section == NULL
8691 || !is_static_defined (sda))
8692 {
8693 unresolved_reloc = TRUE;
8694 break;
8695 }
8696 addend -= SYM_VAL (sda);
8697
8698 name = bfd_get_section_name (output_bfd, sec->output_section);
8699 if (! ((CONST_STRNEQ (name, ".sdata")
8700 && (name[6] == 0 || name[6] == '.'))
8701 || (CONST_STRNEQ (name, ".sbss")
8702 && (name[5] == 0 || name[5] == '.'))))
8703 {
8704 info->callbacks->einfo
8705 (_("%P: %B: the target (%s) of a %s relocation is "
8706 "in the wrong output section (%s)\n"),
8707 input_bfd,
8708 sym_name,
8709 howto->name,
8710 name);
8711 }
8712 }
8713 break;
8714
8715 /* Relocate against _SDA2_BASE_. */
8716 case R_PPC_EMB_SDA2REL:
8717 {
8718 const char *name;
8719 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8720
8721 if (sec == NULL
8722 || sec->output_section == NULL
8723 || !is_static_defined (sda))
8724 {
8725 unresolved_reloc = TRUE;
8726 break;
8727 }
8728 addend -= SYM_VAL (sda);
8729
8730 name = bfd_get_section_name (output_bfd, sec->output_section);
8731 if (! (CONST_STRNEQ (name, ".sdata2")
8732 || CONST_STRNEQ (name, ".sbss2")))
8733 {
8734 info->callbacks->einfo
8735 (_("%P: %B: the target (%s) of a %s relocation is "
8736 "in the wrong output section (%s)\n"),
8737 input_bfd,
8738 sym_name,
8739 howto->name,
8740 name);
8741 }
8742 }
8743 break;
8744
8745 case R_PPC_VLE_LO16A:
8746 relocation = relocation + addend;
8747 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8748 relocation, split16a_type);
8749 continue;
8750
8751 case R_PPC_VLE_LO16D:
8752 relocation = relocation + addend;
8753 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8754 relocation, split16d_type);
8755 continue;
8756
8757 case R_PPC_VLE_HI16A:
8758 relocation = (relocation + addend) >> 16;
8759 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8760 relocation, split16a_type);
8761 continue;
8762
8763 case R_PPC_VLE_HI16D:
8764 relocation = (relocation + addend) >> 16;
8765 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8766 relocation, split16d_type);
8767 continue;
8768
8769 case R_PPC_VLE_HA16A:
8770 relocation = (relocation + addend + 0x8000) >> 16;
8771 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8772 relocation, split16a_type);
8773 continue;
8774
8775 case R_PPC_VLE_HA16D:
8776 relocation = (relocation + addend + 0x8000) >> 16;
8777 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8778 relocation, split16d_type);
8779 continue;
8780
8781 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8782 case R_PPC_EMB_SDA21:
8783 case R_PPC_VLE_SDA21:
8784 case R_PPC_EMB_RELSDA:
8785 case R_PPC_VLE_SDA21_LO:
8786 {
8787 const char *name;
8788 int reg;
8789 unsigned int insn;
8790 struct elf_link_hash_entry *sda = NULL;
8791
8792 if (sec == NULL || sec->output_section == NULL)
8793 {
8794 unresolved_reloc = TRUE;
8795 break;
8796 }
8797
8798 name = bfd_get_section_name (output_bfd, sec->output_section);
8799 if (((CONST_STRNEQ (name, ".sdata")
8800 && (name[6] == 0 || name[6] == '.'))
8801 || (CONST_STRNEQ (name, ".sbss")
8802 && (name[5] == 0 || name[5] == '.'))))
8803 {
8804 reg = 13;
8805 sda = htab->sdata[0].sym;
8806 }
8807 else if (CONST_STRNEQ (name, ".sdata2")
8808 || CONST_STRNEQ (name, ".sbss2"))
8809 {
8810 reg = 2;
8811 sda = htab->sdata[1].sym;
8812 }
8813 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8814 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8815 {
8816 reg = 0;
8817 }
8818 else
8819 {
8820 info->callbacks->einfo
8821 (_("%P: %B: the target (%s) of a %s relocation is "
8822 "in the wrong output section (%s)\n"),
8823 input_bfd,
8824 sym_name,
8825 howto->name,
8826 name);
8827
8828 bfd_set_error (bfd_error_bad_value);
8829 ret = FALSE;
8830 continue;
8831 }
8832
8833 if (sda != NULL)
8834 {
8835 if (!is_static_defined (sda))
8836 {
8837 unresolved_reloc = TRUE;
8838 break;
8839 }
8840 addend -= SYM_VAL (sda);
8841 }
8842
8843 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8844 if (reg == 0
8845 && (r_type == R_PPC_VLE_SDA21
8846 || r_type == R_PPC_VLE_SDA21_LO))
8847 {
8848 relocation = relocation + addend;
8849 addend = 0;
8850
8851 /* Force e_li insn, keeping RT from original insn. */
8852 insn &= 0x1f << 21;
8853 insn |= 28u << 26;
8854
8855 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8856 /* Top 4 bits of value to 17..20. */
8857 insn |= (relocation & 0xf0000) >> 5;
8858 /* Next 5 bits of the value to 11..15. */
8859 insn |= (relocation & 0xf800) << 5;
8860 /* And the final 11 bits of the value to bits 21 to 31. */
8861 insn |= relocation & 0x7ff;
8862
8863 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8864
8865 if (r_type == R_PPC_VLE_SDA21
8866 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8867 goto overflow;
8868 continue;
8869 }
8870 else if (r_type == R_PPC_EMB_SDA21
8871 || r_type == R_PPC_VLE_SDA21
8872 || r_type == R_PPC_VLE_SDA21_LO)
8873 {
8874 /* Fill in register field. */
8875 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8876 }
8877 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8878 }
8879 break;
8880
8881 case R_PPC_VLE_SDAREL_LO16A:
8882 case R_PPC_VLE_SDAREL_LO16D:
8883 case R_PPC_VLE_SDAREL_HI16A:
8884 case R_PPC_VLE_SDAREL_HI16D:
8885 case R_PPC_VLE_SDAREL_HA16A:
8886 case R_PPC_VLE_SDAREL_HA16D:
8887 {
8888 bfd_vma value;
8889 const char *name;
8890 //int reg;
8891 struct elf_link_hash_entry *sda = NULL;
8892
8893 if (sec == NULL || sec->output_section == NULL)
8894 {
8895 unresolved_reloc = TRUE;
8896 break;
8897 }
8898
8899 name = bfd_get_section_name (output_bfd, sec->output_section);
8900 if (((CONST_STRNEQ (name, ".sdata")
8901 && (name[6] == 0 || name[6] == '.'))
8902 || (CONST_STRNEQ (name, ".sbss")
8903 && (name[5] == 0 || name[5] == '.'))))
8904 {
8905 //reg = 13;
8906 sda = htab->sdata[0].sym;
8907 }
8908 else if (CONST_STRNEQ (name, ".sdata2")
8909 || CONST_STRNEQ (name, ".sbss2"))
8910 {
8911 //reg = 2;
8912 sda = htab->sdata[1].sym;
8913 }
8914 else
8915 {
8916 (*_bfd_error_handler)
8917 (_("%B: the target (%s) of a %s relocation is "
8918 "in the wrong output section (%s)"),
8919 input_bfd,
8920 sym_name,
8921 howto->name,
8922 name);
8923
8924 bfd_set_error (bfd_error_bad_value);
8925 ret = FALSE;
8926 continue;
8927 }
8928
8929 if (sda != NULL)
8930 {
8931 if (!is_static_defined (sda))
8932 {
8933 unresolved_reloc = TRUE;
8934 break;
8935 }
8936 }
8937
8938 value = (sda->root.u.def.section->output_section->vma
8939 + sda->root.u.def.section->output_offset
8940 + addend);
8941
8942 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8943 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8944 value, split16a_type);
8945 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8946 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8947 value, split16d_type);
8948 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8949 {
8950 value = value >> 16;
8951 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8952 value, split16a_type);
8953 }
8954 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8955 {
8956 value = value >> 16;
8957 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8958 value, split16d_type);
8959 }
8960 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8961 {
8962 value = (value + 0x8000) >> 16;
8963 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8964 value, split16a_type);
8965 }
8966 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8967 {
8968 value = (value + 0x8000) >> 16;
8969 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8970 value, split16d_type);
8971 }
8972 }
8973 continue;
8974
8975 /* Relocate against the beginning of the section. */
8976 case R_PPC_SECTOFF:
8977 case R_PPC_SECTOFF_LO:
8978 case R_PPC_SECTOFF_HI:
8979 case R_PPC_SECTOFF_HA:
8980 if (sec == NULL || sec->output_section == NULL)
8981 {
8982 unresolved_reloc = TRUE;
8983 break;
8984 }
8985 addend -= sec->output_section->vma;
8986 break;
8987
8988 /* Negative relocations. */
8989 case R_PPC_EMB_NADDR32:
8990 case R_PPC_EMB_NADDR16:
8991 case R_PPC_EMB_NADDR16_LO:
8992 case R_PPC_EMB_NADDR16_HI:
8993 case R_PPC_EMB_NADDR16_HA:
8994 addend -= 2 * relocation;
8995 break;
8996
8997 case R_PPC_COPY:
8998 case R_PPC_GLOB_DAT:
8999 case R_PPC_JMP_SLOT:
9000 case R_PPC_RELATIVE:
9001 case R_PPC_IRELATIVE:
9002 case R_PPC_PLT32:
9003 case R_PPC_PLTREL32:
9004 case R_PPC_PLT16_LO:
9005 case R_PPC_PLT16_HI:
9006 case R_PPC_PLT16_HA:
9007 case R_PPC_ADDR30:
9008 case R_PPC_EMB_RELSEC16:
9009 case R_PPC_EMB_RELST_LO:
9010 case R_PPC_EMB_RELST_HI:
9011 case R_PPC_EMB_RELST_HA:
9012 case R_PPC_EMB_BIT_FLD:
9013 info->callbacks->einfo
9014 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9015 input_bfd,
9016 howto->name,
9017 sym_name);
9018
9019 bfd_set_error (bfd_error_invalid_operation);
9020 ret = FALSE;
9021 continue;
9022 }
9023
9024 /* Do any further special processing. */
9025 switch (r_type)
9026 {
9027 default:
9028 break;
9029
9030 case R_PPC_ADDR16_HA:
9031 case R_PPC_REL16_HA:
9032 case R_PPC_SECTOFF_HA:
9033 case R_PPC_TPREL16_HA:
9034 case R_PPC_DTPREL16_HA:
9035 case R_PPC_EMB_NADDR16_HA:
9036 case R_PPC_EMB_RELST_HA:
9037 /* It's just possible that this symbol is a weak symbol
9038 that's not actually defined anywhere. In that case,
9039 'sec' would be NULL, and we should leave the symbol
9040 alone (it will be set to zero elsewhere in the link). */
9041 if (sec == NULL)
9042 break;
9043 /* Fall thru */
9044
9045 case R_PPC_PLT16_HA:
9046 case R_PPC_GOT16_HA:
9047 case R_PPC_GOT_TLSGD16_HA:
9048 case R_PPC_GOT_TLSLD16_HA:
9049 case R_PPC_GOT_TPREL16_HA:
9050 case R_PPC_GOT_DTPREL16_HA:
9051 /* Add 0x10000 if sign bit in 0:15 is set.
9052 Bits 0:15 are not used. */
9053 addend += 0x8000;
9054 break;
9055
9056 case R_PPC_ADDR16:
9057 case R_PPC_ADDR16_LO:
9058 case R_PPC_GOT16:
9059 case R_PPC_GOT16_LO:
9060 case R_PPC_SDAREL16:
9061 case R_PPC_SECTOFF:
9062 case R_PPC_SECTOFF_LO:
9063 case R_PPC_DTPREL16:
9064 case R_PPC_DTPREL16_LO:
9065 case R_PPC_TPREL16:
9066 case R_PPC_TPREL16_LO:
9067 case R_PPC_GOT_TLSGD16:
9068 case R_PPC_GOT_TLSGD16_LO:
9069 case R_PPC_GOT_TLSLD16:
9070 case R_PPC_GOT_TLSLD16_LO:
9071 case R_PPC_GOT_DTPREL16:
9072 case R_PPC_GOT_DTPREL16_LO:
9073 case R_PPC_GOT_TPREL16:
9074 case R_PPC_GOT_TPREL16_LO:
9075 {
9076 /* The 32-bit ABI lacks proper relocations to deal with
9077 certain 64-bit instructions. Prevent damage to bits
9078 that make up part of the insn opcode. */
9079 unsigned int insn, mask, lobit;
9080
9081 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9082 mask = 0;
9083 if (is_insn_ds_form (insn))
9084 mask = 3;
9085 else if (is_insn_dq_form (insn))
9086 mask = 15;
9087 else
9088 break;
9089 lobit = mask & (relocation + addend);
9090 if (lobit != 0)
9091 {
9092 addend -= lobit;
9093 info->callbacks->einfo
9094 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9095 input_bfd, input_section, rel->r_offset,
9096 howto->name, sym_name, mask + 1);
9097 bfd_set_error (bfd_error_bad_value);
9098 ret = FALSE;
9099 }
9100 addend += insn & mask;
9101 }
9102 break;
9103 }
9104
9105 #ifdef DEBUG
9106 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9107 "offset = %ld, addend = %ld\n",
9108 howto->name,
9109 (int) r_type,
9110 sym_name,
9111 r_symndx,
9112 (long) rel->r_offset,
9113 (long) addend);
9114 #endif
9115
9116 if (unresolved_reloc
9117 && !((input_section->flags & SEC_DEBUGGING) != 0
9118 && h->def_dynamic)
9119 && _bfd_elf_section_offset (output_bfd, info, input_section,
9120 rel->r_offset) != (bfd_vma) -1)
9121 {
9122 info->callbacks->einfo
9123 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9124 input_bfd, input_section, rel->r_offset,
9125 howto->name,
9126 sym_name);
9127 ret = FALSE;
9128 }
9129
9130 /* 16-bit fields in insns mostly have signed values, but a
9131 few insns have 16-bit unsigned values. Really, we should
9132 have different reloc types. */
9133 if (howto->complain_on_overflow != complain_overflow_dont
9134 && howto->dst_mask == 0xffff
9135 && (input_section->flags & SEC_CODE) != 0)
9136 {
9137 enum complain_overflow complain = complain_overflow_signed;
9138
9139 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9140 {
9141 unsigned int insn;
9142
9143 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9144 if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9145 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9146 || (insn & (0x3f << 26)) == 26u << 26 /* xori */
9147 || (insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9148 complain = complain_overflow_unsigned;
9149 }
9150 if (howto->complain_on_overflow != complain)
9151 {
9152 alt_howto = *howto;
9153 alt_howto.complain_on_overflow = complain;
9154 howto = &alt_howto;
9155 }
9156 }
9157
9158 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9159 rel->r_offset, relocation, addend);
9160
9161 if (r != bfd_reloc_ok)
9162 {
9163 if (r == bfd_reloc_overflow)
9164 {
9165 overflow:
9166 if (warned)
9167 continue;
9168 if (h != NULL
9169 && h->root.type == bfd_link_hash_undefweak
9170 && howto->pc_relative)
9171 {
9172 /* Assume this is a call protected by other code that
9173 detect the symbol is undefined. If this is the case,
9174 we can safely ignore the overflow. If not, the
9175 program is hosed anyway, and a little warning isn't
9176 going to help. */
9177
9178 continue;
9179 }
9180
9181 if (! (*info->callbacks->reloc_overflow) (info,
9182 (h ? &h->root : NULL),
9183 sym_name,
9184 howto->name,
9185 rel->r_addend,
9186 input_bfd,
9187 input_section,
9188 rel->r_offset))
9189 return FALSE;
9190 }
9191 else
9192 {
9193 info->callbacks->einfo
9194 (_("%P: %H: %s reloc against `%s': error %d\n"),
9195 input_bfd, input_section, rel->r_offset,
9196 howto->name, sym_name, (int) r);
9197 ret = FALSE;
9198 }
9199 }
9200 }
9201
9202 #ifdef DEBUG
9203 fprintf (stderr, "\n");
9204 #endif
9205
9206 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9207 && input_section->size != input_section->rawsize
9208 && (strcmp (input_section->output_section->name, ".init") == 0
9209 || strcmp (input_section->output_section->name, ".fini") == 0))
9210 {
9211 /* Branch around the trampolines. */
9212 unsigned int insn = B + input_section->size - input_section->rawsize;
9213 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9214 }
9215
9216 if (htab->params->ppc476_workaround
9217 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9218 && (!info->relocatable
9219 || (input_section->output_section->alignment_power
9220 >= htab->params->pagesize_p2)))
9221 {
9222 struct ppc_elf_relax_info *relax_info;
9223 bfd_vma start_addr, end_addr, addr;
9224 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9225
9226 relax_info = elf_section_data (input_section)->sec_info;
9227 if (relax_info->workaround_size != 0)
9228 {
9229 bfd_byte *p;
9230 unsigned int n;
9231 bfd_byte fill[4];
9232
9233 bfd_put_32 (input_bfd, BA, fill);
9234 p = contents + input_section->size - relax_info->workaround_size;
9235 n = relax_info->workaround_size >> 2;
9236 while (n--)
9237 {
9238 memcpy (p, fill, 4);
9239 p += 4;
9240 }
9241 }
9242
9243 /* The idea is: Replace the last instruction on a page with a
9244 branch to a patch area. Put the insn there followed by a
9245 branch back to the next page. Complicated a little by
9246 needing to handle moved conditional branches, and by not
9247 wanting to touch data-in-text. */
9248
9249 start_addr = (input_section->output_section->vma
9250 + input_section->output_offset);
9251 end_addr = (start_addr + input_section->size
9252 - relax_info->workaround_size);
9253 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9254 addr < end_addr;
9255 addr += pagesize)
9256 {
9257 bfd_vma offset = addr - start_addr;
9258 Elf_Internal_Rela *lo, *hi;
9259 bfd_boolean is_data;
9260 bfd_vma patch_off, patch_addr;
9261 unsigned int insn;
9262
9263 /* Do we have a data reloc at this offset? If so, leave
9264 the word alone. */
9265 is_data = FALSE;
9266 lo = relocs;
9267 hi = relend;
9268 rel = NULL;
9269 while (lo < hi)
9270 {
9271 rel = lo + (hi - lo) / 2;
9272 if (rel->r_offset < offset)
9273 lo = rel + 1;
9274 else if (rel->r_offset > offset + 3)
9275 hi = rel;
9276 else
9277 {
9278 switch (ELF32_R_TYPE (rel->r_info))
9279 {
9280 case R_PPC_ADDR32:
9281 case R_PPC_UADDR32:
9282 case R_PPC_REL32:
9283 case R_PPC_ADDR30:
9284 is_data = TRUE;
9285 break;
9286 default:
9287 break;
9288 }
9289 break;
9290 }
9291 }
9292 if (is_data)
9293 continue;
9294
9295 /* Some instructions can be left alone too. Unconditional
9296 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9297 avoid the icache failure.
9298
9299 The problem occurs due to prefetch across a page boundary
9300 where stale instructions can be fetched from the next
9301 page, and the mechanism for flushing these bad
9302 instructions fails under certain circumstances. The
9303 unconditional branches:
9304 1) Branch: b, bl, ba, bla,
9305 2) Branch Conditional: bc, bca, bcl, bcla,
9306 3) Branch Conditional to Link Register: bclr, bclrl,
9307 where (2) and (3) have BO=0x14 making them unconditional,
9308 prevent the bad prefetch because the prefetch itself is
9309 affected by these instructions. This happens even if the
9310 instruction is not executed.
9311
9312 A bctr example:
9313 .
9314 . lis 9,new_page@ha
9315 . addi 9,9,new_page@l
9316 . mtctr 9
9317 . bctr
9318 . nop
9319 . nop
9320 . new_page:
9321 .
9322 The bctr is not predicted taken due to ctr not being
9323 ready, so prefetch continues on past the bctr into the
9324 new page which might have stale instructions. If they
9325 fail to be flushed, then they will be executed after the
9326 bctr executes. Either of the following modifications
9327 prevent the bad prefetch from happening in the first
9328 place:
9329 .
9330 . lis 9,new_page@ha lis 9,new_page@ha
9331 . addi 9,9,new_page@l addi 9,9,new_page@l
9332 . mtctr 9 mtctr 9
9333 . bctr bctr
9334 . nop b somewhere_else
9335 . b somewhere_else nop
9336 . new_page: new_page:
9337 . */
9338 insn = bfd_get_32 (input_bfd, contents + offset);
9339 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9340 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9341 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9342 || ((insn & (0x3f << 26)) == (19u << 26)
9343 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9344 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9345 continue;
9346
9347 patch_addr = (start_addr + input_section->size
9348 - relax_info->workaround_size);
9349 patch_addr = (patch_addr + 15) & -16;
9350 patch_off = patch_addr - start_addr;
9351 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9352
9353 if (rel != NULL
9354 && rel->r_offset >= offset
9355 && rel->r_offset < offset + 4)
9356 {
9357 /* If the insn we are patching had a reloc, adjust the
9358 reloc r_offset so that the reloc applies to the moved
9359 location. This matters for -r and --emit-relocs. */
9360 if (rel + 1 != relend)
9361 {
9362 Elf_Internal_Rela tmp = *rel;
9363
9364 /* Keep the relocs sorted by r_offset. */
9365 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9366 relend[-1] = tmp;
9367 }
9368 relend[-1].r_offset += patch_off - offset;
9369 }
9370 else
9371 rel = NULL;
9372
9373 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9374 && (insn & 2) == 0 /* relative */)
9375 {
9376 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9377
9378 delta += offset - patch_off;
9379 if (info->relocatable && rel != NULL)
9380 delta = 0;
9381 if (!info->relocatable && rel != NULL)
9382 {
9383 enum elf_ppc_reloc_type r_type;
9384
9385 r_type = ELF32_R_TYPE (relend[-1].r_info);
9386 if (r_type == R_PPC_REL14_BRTAKEN)
9387 insn |= BRANCH_PREDICT_BIT;
9388 else if (r_type == R_PPC_REL14_BRNTAKEN)
9389 insn &= ~BRANCH_PREDICT_BIT;
9390 else
9391 BFD_ASSERT (r_type == R_PPC_REL14);
9392
9393 if ((r_type == R_PPC_REL14_BRTAKEN
9394 || r_type == R_PPC_REL14_BRNTAKEN)
9395 && delta + 0x8000 < 0x10000
9396 && (bfd_signed_vma) delta < 0)
9397 insn ^= BRANCH_PREDICT_BIT;
9398 }
9399 if (delta + 0x8000 < 0x10000)
9400 {
9401 bfd_put_32 (input_bfd,
9402 (insn & ~0xfffc) | (delta & 0xfffc),
9403 contents + patch_off);
9404 patch_off += 4;
9405 bfd_put_32 (input_bfd,
9406 B | ((offset + 4 - patch_off) & 0x3fffffc),
9407 contents + patch_off);
9408 patch_off += 4;
9409 }
9410 else
9411 {
9412 if (rel != NULL)
9413 {
9414 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9415
9416 relend[-1].r_offset += 8;
9417 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9418 }
9419 bfd_put_32 (input_bfd,
9420 (insn & ~0xfffc) | 8,
9421 contents + patch_off);
9422 patch_off += 4;
9423 bfd_put_32 (input_bfd,
9424 B | ((offset + 4 - patch_off) & 0x3fffffc),
9425 contents + patch_off);
9426 patch_off += 4;
9427 bfd_put_32 (input_bfd,
9428 B | ((delta - 8) & 0x3fffffc),
9429 contents + patch_off);
9430 patch_off += 4;
9431 }
9432 }
9433 else
9434 {
9435 bfd_put_32 (input_bfd, insn, 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 BFD_ASSERT (patch_off <= input_section->size);
9443 relax_info->workaround_size = input_section->size - patch_off;
9444 }
9445 }
9446
9447 return ret;
9448 }
9449 \f
9450 /* Finish up dynamic symbol handling. We set the contents of various
9451 dynamic sections here. */
9452
9453 static bfd_boolean
9454 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9455 struct bfd_link_info *info,
9456 struct elf_link_hash_entry *h,
9457 Elf_Internal_Sym *sym)
9458 {
9459 struct ppc_elf_link_hash_table *htab;
9460 struct plt_entry *ent;
9461 bfd_boolean doneone;
9462
9463 #ifdef DEBUG
9464 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9465 h->root.root.string);
9466 #endif
9467
9468 htab = ppc_elf_hash_table (info);
9469 BFD_ASSERT (htab->elf.dynobj != NULL);
9470
9471 doneone = FALSE;
9472 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9473 if (ent->plt.offset != (bfd_vma) -1)
9474 {
9475 if (!doneone)
9476 {
9477 Elf_Internal_Rela rela;
9478 bfd_byte *loc;
9479 bfd_vma reloc_index;
9480
9481 if (htab->plt_type == PLT_NEW
9482 || !htab->elf.dynamic_sections_created
9483 || h->dynindx == -1)
9484 reloc_index = ent->plt.offset / 4;
9485 else
9486 {
9487 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9488 / htab->plt_slot_size);
9489 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9490 && htab->plt_type == PLT_OLD)
9491 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9492 }
9493
9494 /* This symbol has an entry in the procedure linkage table.
9495 Set it up. */
9496 if (htab->plt_type == PLT_VXWORKS
9497 && htab->elf.dynamic_sections_created
9498 && h->dynindx != -1)
9499 {
9500 bfd_vma got_offset;
9501 const bfd_vma *plt_entry;
9502
9503 /* The first three entries in .got.plt are reserved. */
9504 got_offset = (reloc_index + 3) * 4;
9505
9506 /* Use the right PLT. */
9507 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9508 : ppc_elf_vxworks_plt_entry;
9509
9510 /* Fill in the .plt on VxWorks. */
9511 if (info->shared)
9512 {
9513 bfd_put_32 (output_bfd,
9514 plt_entry[0] | PPC_HA (got_offset),
9515 htab->plt->contents + ent->plt.offset + 0);
9516 bfd_put_32 (output_bfd,
9517 plt_entry[1] | PPC_LO (got_offset),
9518 htab->plt->contents + ent->plt.offset + 4);
9519 }
9520 else
9521 {
9522 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9523
9524 bfd_put_32 (output_bfd,
9525 plt_entry[0] | PPC_HA (got_loc),
9526 htab->plt->contents + ent->plt.offset + 0);
9527 bfd_put_32 (output_bfd,
9528 plt_entry[1] | PPC_LO (got_loc),
9529 htab->plt->contents + ent->plt.offset + 4);
9530 }
9531
9532 bfd_put_32 (output_bfd, plt_entry[2],
9533 htab->plt->contents + ent->plt.offset + 8);
9534 bfd_put_32 (output_bfd, plt_entry[3],
9535 htab->plt->contents + ent->plt.offset + 12);
9536
9537 /* This instruction is an immediate load. The value loaded is
9538 the byte offset of the R_PPC_JMP_SLOT relocation from the
9539 start of the .rela.plt section. The value is stored in the
9540 low-order 16 bits of the load instruction. */
9541 /* NOTE: It appears that this is now an index rather than a
9542 prescaled offset. */
9543 bfd_put_32 (output_bfd,
9544 plt_entry[4] | reloc_index,
9545 htab->plt->contents + ent->plt.offset + 16);
9546 /* This instruction is a PC-relative branch whose target is
9547 the start of the PLT section. The address of this branch
9548 instruction is 20 bytes beyond the start of this PLT entry.
9549 The address is encoded in bits 6-29, inclusive. The value
9550 stored is right-shifted by two bits, permitting a 26-bit
9551 offset. */
9552 bfd_put_32 (output_bfd,
9553 (plt_entry[5]
9554 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9555 htab->plt->contents + ent->plt.offset + 20);
9556 bfd_put_32 (output_bfd, plt_entry[6],
9557 htab->plt->contents + ent->plt.offset + 24);
9558 bfd_put_32 (output_bfd, plt_entry[7],
9559 htab->plt->contents + ent->plt.offset + 28);
9560
9561 /* Fill in the GOT entry corresponding to this PLT slot with
9562 the address immediately after the "bctr" instruction
9563 in this PLT entry. */
9564 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9565 + htab->plt->output_offset
9566 + ent->plt.offset + 16),
9567 htab->sgotplt->contents + got_offset);
9568
9569 if (!info->shared)
9570 {
9571 /* Fill in a couple of entries in .rela.plt.unloaded. */
9572 loc = htab->srelplt2->contents
9573 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9574 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9575 * sizeof (Elf32_External_Rela));
9576
9577 /* Provide the @ha relocation for the first instruction. */
9578 rela.r_offset = (htab->plt->output_section->vma
9579 + htab->plt->output_offset
9580 + ent->plt.offset + 2);
9581 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9582 R_PPC_ADDR16_HA);
9583 rela.r_addend = got_offset;
9584 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9585 loc += sizeof (Elf32_External_Rela);
9586
9587 /* Provide the @l relocation for the second instruction. */
9588 rela.r_offset = (htab->plt->output_section->vma
9589 + htab->plt->output_offset
9590 + ent->plt.offset + 6);
9591 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9592 R_PPC_ADDR16_LO);
9593 rela.r_addend = got_offset;
9594 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9595 loc += sizeof (Elf32_External_Rela);
9596
9597 /* Provide a relocation for the GOT entry corresponding to this
9598 PLT slot. Point it at the middle of the .plt entry. */
9599 rela.r_offset = (htab->sgotplt->output_section->vma
9600 + htab->sgotplt->output_offset
9601 + got_offset);
9602 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9603 R_PPC_ADDR32);
9604 rela.r_addend = ent->plt.offset + 16;
9605 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9606 }
9607
9608 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9609 In particular, the offset for the relocation is not the
9610 address of the PLT entry for this function, as specified
9611 by the ABI. Instead, the offset is set to the address of
9612 the GOT slot for this function. See EABI 4.4.4.1. */
9613 rela.r_offset = (htab->sgotplt->output_section->vma
9614 + htab->sgotplt->output_offset
9615 + got_offset);
9616
9617 }
9618 else
9619 {
9620 asection *splt = htab->plt;
9621 if (!htab->elf.dynamic_sections_created
9622 || h->dynindx == -1)
9623 splt = htab->iplt;
9624
9625 rela.r_offset = (splt->output_section->vma
9626 + splt->output_offset
9627 + ent->plt.offset);
9628 if (htab->plt_type == PLT_OLD
9629 || !htab->elf.dynamic_sections_created
9630 || h->dynindx == -1)
9631 {
9632 /* We don't need to fill in the .plt. The ppc dynamic
9633 linker will fill it in. */
9634 }
9635 else
9636 {
9637 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9638 + htab->glink->output_section->vma
9639 + htab->glink->output_offset);
9640 bfd_put_32 (output_bfd, val,
9641 splt->contents + ent->plt.offset);
9642 }
9643 }
9644
9645 /* Fill in the entry in the .rela.plt section. */
9646 rela.r_addend = 0;
9647 if (!htab->elf.dynamic_sections_created
9648 || h->dynindx == -1)
9649 {
9650 BFD_ASSERT (h->type == STT_GNU_IFUNC
9651 && h->def_regular
9652 && (h->root.type == bfd_link_hash_defined
9653 || h->root.type == bfd_link_hash_defweak));
9654 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9655 rela.r_addend = SYM_VAL (h);
9656 }
9657 else
9658 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9659
9660 if (!htab->elf.dynamic_sections_created
9661 || h->dynindx == -1)
9662 loc = (htab->reliplt->contents
9663 + (htab->reliplt->reloc_count++
9664 * sizeof (Elf32_External_Rela)));
9665 else
9666 loc = (htab->relplt->contents
9667 + reloc_index * sizeof (Elf32_External_Rela));
9668 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9669
9670 if (!h->def_regular)
9671 {
9672 /* Mark the symbol as undefined, rather than as
9673 defined in the .plt section. Leave the value if
9674 there were any relocations where pointer equality
9675 matters (this is a clue for the dynamic linker, to
9676 make function pointer comparisons work between an
9677 application and shared library), otherwise set it
9678 to zero. */
9679 sym->st_shndx = SHN_UNDEF;
9680 if (!h->pointer_equality_needed)
9681 sym->st_value = 0;
9682 else if (!h->ref_regular_nonweak)
9683 {
9684 /* This breaks function pointer comparisons, but
9685 that is better than breaking tests for a NULL
9686 function pointer. */
9687 sym->st_value = 0;
9688 }
9689 }
9690 else if (h->type == STT_GNU_IFUNC
9691 && !info->shared)
9692 {
9693 /* Set the value of ifunc symbols in a non-pie
9694 executable to the glink entry. This is to avoid
9695 text relocations. We can't do this for ifunc in
9696 allocate_dynrelocs, as we do for normal dynamic
9697 function symbols with plt entries, because we need
9698 to keep the original value around for the ifunc
9699 relocation. */
9700 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9701 (output_bfd, htab->glink->output_section));
9702 sym->st_value = (ent->glink_offset
9703 + htab->glink->output_offset
9704 + htab->glink->output_section->vma);
9705 }
9706 doneone = TRUE;
9707 }
9708
9709 if (htab->plt_type == PLT_NEW
9710 || !htab->elf.dynamic_sections_created
9711 || h->dynindx == -1)
9712 {
9713 unsigned char *p;
9714 asection *splt = htab->plt;
9715 if (!htab->elf.dynamic_sections_created
9716 || h->dynindx == -1)
9717 splt = htab->iplt;
9718
9719 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9720
9721 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9722 {
9723 bfd_put_32 (output_bfd, LWZ_11_3, p);
9724 p += 4;
9725 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9726 p += 4;
9727 bfd_put_32 (output_bfd, MR_0_3, p);
9728 p += 4;
9729 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9730 p += 4;
9731 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9732 p += 4;
9733 bfd_put_32 (output_bfd, BEQLR, p);
9734 p += 4;
9735 bfd_put_32 (output_bfd, MR_3_0, p);
9736 p += 4;
9737 bfd_put_32 (output_bfd, NOP, p);
9738 p += 4;
9739 }
9740
9741 write_glink_stub (ent, splt, p, info);
9742
9743 if (!info->shared)
9744 /* We only need one non-PIC glink stub. */
9745 break;
9746 }
9747 else
9748 break;
9749 }
9750
9751 if (h->needs_copy)
9752 {
9753 asection *s;
9754 Elf_Internal_Rela rela;
9755 bfd_byte *loc;
9756
9757 /* This symbols needs a copy reloc. Set it up. */
9758
9759 #ifdef DEBUG
9760 fprintf (stderr, ", copy");
9761 #endif
9762
9763 BFD_ASSERT (h->dynindx != -1);
9764
9765 if (ppc_elf_hash_entry (h)->has_sda_refs)
9766 s = htab->relsbss;
9767 else
9768 s = htab->relbss;
9769 BFD_ASSERT (s != NULL);
9770
9771 rela.r_offset = SYM_VAL (h);
9772 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9773 rela.r_addend = 0;
9774 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9775 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9776 }
9777
9778 #ifdef DEBUG
9779 fprintf (stderr, "\n");
9780 #endif
9781
9782 return TRUE;
9783 }
9784 \f
9785 static enum elf_reloc_type_class
9786 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9787 const asection *rel_sec,
9788 const Elf_Internal_Rela *rela)
9789 {
9790 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9791
9792 if (rel_sec == htab->reliplt)
9793 return reloc_class_ifunc;
9794
9795 switch (ELF32_R_TYPE (rela->r_info))
9796 {
9797 case R_PPC_RELATIVE:
9798 return reloc_class_relative;
9799 case R_PPC_JMP_SLOT:
9800 return reloc_class_plt;
9801 case R_PPC_COPY:
9802 return reloc_class_copy;
9803 default:
9804 return reloc_class_normal;
9805 }
9806 }
9807 \f
9808 /* Finish up the dynamic sections. */
9809
9810 static bfd_boolean
9811 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9812 struct bfd_link_info *info)
9813 {
9814 asection *sdyn;
9815 asection *splt;
9816 struct ppc_elf_link_hash_table *htab;
9817 bfd_vma got;
9818 bfd *dynobj;
9819 bfd_boolean ret = TRUE;
9820
9821 #ifdef DEBUG
9822 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9823 #endif
9824
9825 htab = ppc_elf_hash_table (info);
9826 dynobj = elf_hash_table (info)->dynobj;
9827 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9828 if (htab->is_vxworks)
9829 splt = bfd_get_linker_section (dynobj, ".plt");
9830 else
9831 splt = NULL;
9832
9833 got = 0;
9834 if (htab->elf.hgot != NULL)
9835 got = SYM_VAL (htab->elf.hgot);
9836
9837 if (htab->elf.dynamic_sections_created)
9838 {
9839 Elf32_External_Dyn *dyncon, *dynconend;
9840
9841 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9842
9843 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9844 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9845 for (; dyncon < dynconend; dyncon++)
9846 {
9847 Elf_Internal_Dyn dyn;
9848 asection *s;
9849
9850 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9851
9852 switch (dyn.d_tag)
9853 {
9854 case DT_PLTGOT:
9855 if (htab->is_vxworks)
9856 s = htab->sgotplt;
9857 else
9858 s = htab->plt;
9859 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9860 break;
9861
9862 case DT_PLTRELSZ:
9863 dyn.d_un.d_val = htab->relplt->size;
9864 break;
9865
9866 case DT_JMPREL:
9867 s = htab->relplt;
9868 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9869 break;
9870
9871 case DT_PPC_GOT:
9872 dyn.d_un.d_ptr = got;
9873 break;
9874
9875 case DT_RELASZ:
9876 if (htab->is_vxworks)
9877 {
9878 if (htab->relplt)
9879 dyn.d_un.d_ptr -= htab->relplt->size;
9880 break;
9881 }
9882 continue;
9883
9884 default:
9885 if (htab->is_vxworks
9886 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9887 break;
9888 continue;
9889 }
9890
9891 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9892 }
9893 }
9894
9895 if (htab->got != NULL)
9896 {
9897 if (htab->elf.hgot->root.u.def.section == htab->got
9898 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9899 {
9900 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9901
9902 p += htab->elf.hgot->root.u.def.value;
9903 if (htab->plt_type == PLT_OLD)
9904 {
9905 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9906 so that a function can easily find the address of
9907 _GLOBAL_OFFSET_TABLE_. */
9908 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9909 < htab->elf.hgot->root.u.def.section->size);
9910 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9911 }
9912
9913 if (sdyn != NULL)
9914 {
9915 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9916 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9917 < htab->elf.hgot->root.u.def.section->size);
9918 bfd_put_32 (output_bfd, val, p);
9919 }
9920 }
9921 else
9922 {
9923 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9924 htab->elf.hgot->root.root.string,
9925 (htab->sgotplt != NULL
9926 ? htab->sgotplt->name : htab->got->name));
9927 bfd_set_error (bfd_error_bad_value);
9928 ret = FALSE;
9929 }
9930
9931 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9932 }
9933
9934 /* Fill in the first entry in the VxWorks procedure linkage table. */
9935 if (splt && splt->size > 0)
9936 {
9937 /* Use the right PLT. */
9938 const bfd_vma *plt_entry = (info->shared
9939 ? ppc_elf_vxworks_pic_plt0_entry
9940 : ppc_elf_vxworks_plt0_entry);
9941
9942 if (!info->shared)
9943 {
9944 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9945
9946 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9947 splt->contents + 0);
9948 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9949 splt->contents + 4);
9950 }
9951 else
9952 {
9953 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9954 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9955 }
9956 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9957 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9958 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9959 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9960 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9961 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9962
9963 if (! info->shared)
9964 {
9965 Elf_Internal_Rela rela;
9966 bfd_byte *loc;
9967
9968 loc = htab->srelplt2->contents;
9969
9970 /* Output the @ha relocation for the first instruction. */
9971 rela.r_offset = (htab->plt->output_section->vma
9972 + htab->plt->output_offset
9973 + 2);
9974 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9975 rela.r_addend = 0;
9976 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9977 loc += sizeof (Elf32_External_Rela);
9978
9979 /* Output the @l relocation for the second instruction. */
9980 rela.r_offset = (htab->plt->output_section->vma
9981 + htab->plt->output_offset
9982 + 6);
9983 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9984 rela.r_addend = 0;
9985 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9986 loc += sizeof (Elf32_External_Rela);
9987
9988 /* Fix up the remaining relocations. They may have the wrong
9989 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9990 in which symbols were output. */
9991 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9992 {
9993 Elf_Internal_Rela rel;
9994
9995 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9996 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9997 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9998 loc += sizeof (Elf32_External_Rela);
9999
10000 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10001 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10002 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10003 loc += sizeof (Elf32_External_Rela);
10004
10005 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10006 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10007 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10008 loc += sizeof (Elf32_External_Rela);
10009 }
10010 }
10011 }
10012
10013 if (htab->glink != NULL
10014 && htab->glink->contents != NULL
10015 && htab->elf.dynamic_sections_created)
10016 {
10017 unsigned char *p;
10018 unsigned char *endp;
10019 bfd_vma res0;
10020 unsigned int i;
10021
10022 /*
10023 * PIC glink code is the following:
10024 *
10025 * # ith PLT code stub.
10026 * addis 11,30,(plt+(i-1)*4-got)@ha
10027 * lwz 11,(plt+(i-1)*4-got)@l(11)
10028 * mtctr 11
10029 * bctr
10030 *
10031 * # A table of branches, one for each plt entry.
10032 * # The idea is that the plt call stub loads ctr and r11 with these
10033 * # addresses, so (r11 - res_0) gives the plt index * 4.
10034 * res_0: b PLTresolve
10035 * res_1: b PLTresolve
10036 * .
10037 * # Some number of entries towards the end can be nops
10038 * res_n_m3: nop
10039 * res_n_m2: nop
10040 * res_n_m1:
10041 *
10042 * PLTresolve:
10043 * addis 11,11,(1f-res_0)@ha
10044 * mflr 0
10045 * bcl 20,31,1f
10046 * 1: addi 11,11,(1b-res_0)@l
10047 * mflr 12
10048 * mtlr 0
10049 * sub 11,11,12 # r11 = index * 4
10050 * addis 12,12,(got+4-1b)@ha
10051 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10052 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10053 * mtctr 0
10054 * add 0,11,11
10055 * add 11,0,11 # r11 = index * 12 = reloc offset.
10056 * bctr
10057 */
10058 static const unsigned int pic_plt_resolve[] =
10059 {
10060 ADDIS_11_11,
10061 MFLR_0,
10062 BCL_20_31,
10063 ADDI_11_11,
10064 MFLR_12,
10065 MTLR_0,
10066 SUB_11_11_12,
10067 ADDIS_12_12,
10068 LWZ_0_12,
10069 LWZ_12_12,
10070 MTCTR_0,
10071 ADD_0_11_11,
10072 ADD_11_0_11,
10073 BCTR,
10074 NOP,
10075 NOP
10076 };
10077
10078 /*
10079 * Non-PIC glink code is a little simpler.
10080 *
10081 * # ith PLT code stub.
10082 * lis 11,(plt+(i-1)*4)@ha
10083 * lwz 11,(plt+(i-1)*4)@l(11)
10084 * mtctr 11
10085 * bctr
10086 *
10087 * The branch table is the same, then comes
10088 *
10089 * PLTresolve:
10090 * lis 12,(got+4)@ha
10091 * addis 11,11,(-res_0)@ha
10092 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10093 * addi 11,11,(-res_0)@l # r11 = index * 4
10094 * mtctr 0
10095 * add 0,11,11
10096 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10097 * add 11,0,11 # r11 = index * 12 = reloc offset.
10098 * bctr
10099 */
10100 static const unsigned int plt_resolve[] =
10101 {
10102 LIS_12,
10103 ADDIS_11_11,
10104 LWZ_0_12,
10105 ADDI_11_11,
10106 MTCTR_0,
10107 ADD_0_11_11,
10108 LWZ_12_12,
10109 ADD_11_0_11,
10110 BCTR,
10111 NOP,
10112 NOP,
10113 NOP,
10114 NOP,
10115 NOP,
10116 NOP,
10117 NOP
10118 };
10119
10120 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10121 abort ();
10122 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10123 abort ();
10124
10125 /* Build the branch table, one for each plt entry (less one),
10126 and perhaps some padding. */
10127 p = htab->glink->contents;
10128 p += htab->glink_pltresolve;
10129 endp = htab->glink->contents;
10130 endp += htab->glink->size - GLINK_PLTRESOLVE;
10131 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10132 {
10133 bfd_put_32 (output_bfd, B + endp - p, p);
10134 p += 4;
10135 }
10136 while (p < endp)
10137 {
10138 bfd_put_32 (output_bfd, NOP, p);
10139 p += 4;
10140 }
10141
10142 res0 = (htab->glink_pltresolve
10143 + htab->glink->output_section->vma
10144 + htab->glink->output_offset);
10145
10146 if (htab->params->ppc476_workaround)
10147 {
10148 /* Ensure that a call stub at the end of a page doesn't
10149 result in prefetch over the end of the page into the
10150 glink branch table. */
10151 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10152 bfd_vma page_addr;
10153 bfd_vma glink_start = (htab->glink->output_section->vma
10154 + htab->glink->output_offset);
10155
10156 for (page_addr = res0 & -pagesize;
10157 page_addr > glink_start;
10158 page_addr -= pagesize)
10159 {
10160 /* We have a plt call stub that may need fixing. */
10161 bfd_byte *loc;
10162 unsigned int insn;
10163
10164 loc = htab->glink->contents + page_addr - 4 - glink_start;
10165 insn = bfd_get_32 (output_bfd, loc);
10166 if (insn == BCTR)
10167 {
10168 /* By alignment, we know that there must be at least
10169 one other call stub before this one. */
10170 insn = bfd_get_32 (output_bfd, loc - 16);
10171 if (insn == BCTR)
10172 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10173 else
10174 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10175 }
10176 }
10177 }
10178
10179 /* Last comes the PLTresolve stub. */
10180 if (info->shared)
10181 {
10182 bfd_vma bcl;
10183
10184 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10185 {
10186 unsigned int insn = pic_plt_resolve[i];
10187
10188 if (htab->params->ppc476_workaround && insn == NOP)
10189 insn = BA + 0;
10190 bfd_put_32 (output_bfd, insn, p);
10191 p += 4;
10192 }
10193 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10194
10195 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10196 + htab->glink->output_section->vma
10197 + htab->glink->output_offset);
10198
10199 bfd_put_32 (output_bfd,
10200 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10201 bfd_put_32 (output_bfd,
10202 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10203 bfd_put_32 (output_bfd,
10204 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10205 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10206 {
10207 bfd_put_32 (output_bfd,
10208 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10209 bfd_put_32 (output_bfd,
10210 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10211 }
10212 else
10213 {
10214 bfd_put_32 (output_bfd,
10215 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10216 bfd_put_32 (output_bfd,
10217 LWZ_12_12 + 4, p + 9*4);
10218 }
10219 }
10220 else
10221 {
10222 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10223 {
10224 unsigned int insn = plt_resolve[i];
10225
10226 if (htab->params->ppc476_workaround && insn == NOP)
10227 insn = BA + 0;
10228 bfd_put_32 (output_bfd, insn, p);
10229 p += 4;
10230 }
10231 p -= 4 * ARRAY_SIZE (plt_resolve);
10232
10233 bfd_put_32 (output_bfd,
10234 LIS_12 + PPC_HA (got + 4), p + 0*4);
10235 bfd_put_32 (output_bfd,
10236 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10237 bfd_put_32 (output_bfd,
10238 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10239 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10240 {
10241 bfd_put_32 (output_bfd,
10242 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10243 bfd_put_32 (output_bfd,
10244 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10245 }
10246 else
10247 {
10248 bfd_put_32 (output_bfd,
10249 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10250 bfd_put_32 (output_bfd,
10251 LWZ_12_12 + 4, p + 6*4);
10252 }
10253 }
10254 }
10255
10256 if (htab->glink_eh_frame != NULL
10257 && htab->glink_eh_frame->contents != NULL)
10258 {
10259 unsigned char *p = htab->glink_eh_frame->contents;
10260 bfd_vma val;
10261
10262 p += sizeof (glink_eh_frame_cie);
10263 /* FDE length. */
10264 p += 4;
10265 /* CIE pointer. */
10266 p += 4;
10267 /* Offset to .glink. */
10268 val = (htab->glink->output_section->vma
10269 + htab->glink->output_offset);
10270 val -= (htab->glink_eh_frame->output_section->vma
10271 + htab->glink_eh_frame->output_offset);
10272 val -= p - htab->glink_eh_frame->contents;
10273 bfd_put_32 (htab->elf.dynobj, val, p);
10274
10275 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10276 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10277 htab->glink_eh_frame,
10278 htab->glink_eh_frame->contents))
10279 return FALSE;
10280 }
10281
10282 return ret;
10283 }
10284 \f
10285 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10286 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10287 #define TARGET_BIG_SYM powerpc_elf32_vec
10288 #define TARGET_BIG_NAME "elf32-powerpc"
10289 #define ELF_ARCH bfd_arch_powerpc
10290 #define ELF_TARGET_ID PPC32_ELF_DATA
10291 #define ELF_MACHINE_CODE EM_PPC
10292 #ifdef __QNXTARGET__
10293 #define ELF_MAXPAGESIZE 0x1000
10294 #else
10295 #define ELF_MAXPAGESIZE 0x10000
10296 #endif
10297 #define ELF_MINPAGESIZE 0x1000
10298 #define ELF_COMMONPAGESIZE 0x1000
10299 #define elf_info_to_howto ppc_elf_info_to_howto
10300
10301 #ifdef EM_CYGNUS_POWERPC
10302 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10303 #endif
10304
10305 #ifdef EM_PPC_OLD
10306 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10307 #endif
10308
10309 #define elf_backend_plt_not_loaded 1
10310 #define elf_backend_can_gc_sections 1
10311 #define elf_backend_can_refcount 1
10312 #define elf_backend_rela_normal 1
10313 #define elf_backend_caches_rawsize 1
10314
10315 #define bfd_elf32_mkobject ppc_elf_mkobject
10316 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10317 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10318 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10319 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10320 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10321 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10322 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10323
10324 #define elf_backend_object_p ppc_elf_object_p
10325 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10326 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10327 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10328 #define elf_backend_relocate_section ppc_elf_relocate_section
10329 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10330 #define elf_backend_check_relocs ppc_elf_check_relocs
10331 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10332 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10333 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10334 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10335 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10336 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10337 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10338 #define elf_backend_fake_sections ppc_elf_fake_sections
10339 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10340 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10341 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10342 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10343 #define elf_backend_write_core_note ppc_elf_write_core_note
10344 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10345 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10346 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10347 #define elf_backend_write_section ppc_elf_write_section
10348 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10349 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10350 #define elf_backend_action_discarded ppc_elf_action_discarded
10351 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10352 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10353 #define elf_backend_section_processing ppc_elf_section_processing
10354
10355 #include "elf32-target.h"
10356
10357 /* FreeBSD Target */
10358
10359 #undef TARGET_LITTLE_SYM
10360 #undef TARGET_LITTLE_NAME
10361
10362 #undef TARGET_BIG_SYM
10363 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10364 #undef TARGET_BIG_NAME
10365 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10366
10367 #undef ELF_OSABI
10368 #define ELF_OSABI ELFOSABI_FREEBSD
10369
10370 #undef elf32_bed
10371 #define elf32_bed elf32_powerpc_fbsd_bed
10372
10373 #include "elf32-target.h"
10374
10375 /* VxWorks Target */
10376
10377 #undef TARGET_LITTLE_SYM
10378 #undef TARGET_LITTLE_NAME
10379
10380 #undef TARGET_BIG_SYM
10381 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10382 #undef TARGET_BIG_NAME
10383 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10384
10385 #undef ELF_OSABI
10386
10387 /* VxWorks uses the elf default section flags for .plt. */
10388 static const struct bfd_elf_special_section *
10389 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10390 {
10391 if (sec->name == NULL)
10392 return NULL;
10393
10394 if (strcmp (sec->name, ".plt") == 0)
10395 return _bfd_elf_get_sec_type_attr (abfd, sec);
10396
10397 return ppc_elf_get_sec_type_attr (abfd, sec);
10398 }
10399
10400 /* Like ppc_elf_link_hash_table_create, but overrides
10401 appropriately for VxWorks. */
10402 static struct bfd_link_hash_table *
10403 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10404 {
10405 struct bfd_link_hash_table *ret;
10406
10407 ret = ppc_elf_link_hash_table_create (abfd);
10408 if (ret)
10409 {
10410 struct ppc_elf_link_hash_table *htab
10411 = (struct ppc_elf_link_hash_table *)ret;
10412 htab->is_vxworks = 1;
10413 htab->plt_type = PLT_VXWORKS;
10414 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10415 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10416 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10417 }
10418 return ret;
10419 }
10420
10421 /* Tweak magic VxWorks symbols as they are loaded. */
10422 static bfd_boolean
10423 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10424 struct bfd_link_info *info,
10425 Elf_Internal_Sym *sym,
10426 const char **namep ATTRIBUTE_UNUSED,
10427 flagword *flagsp ATTRIBUTE_UNUSED,
10428 asection **secp,
10429 bfd_vma *valp)
10430 {
10431 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10432 valp))
10433 return FALSE;
10434
10435 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10436 }
10437
10438 static void
10439 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10440 {
10441 ppc_elf_final_write_processing(abfd, linker);
10442 elf_vxworks_final_write_processing(abfd, linker);
10443 }
10444
10445 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10446 define it. */
10447 #undef elf_backend_want_plt_sym
10448 #define elf_backend_want_plt_sym 1
10449 #undef elf_backend_want_got_plt
10450 #define elf_backend_want_got_plt 1
10451 #undef elf_backend_got_symbol_offset
10452 #define elf_backend_got_symbol_offset 0
10453 #undef elf_backend_plt_not_loaded
10454 #define elf_backend_plt_not_loaded 0
10455 #undef elf_backend_plt_readonly
10456 #define elf_backend_plt_readonly 1
10457 #undef elf_backend_got_header_size
10458 #define elf_backend_got_header_size 12
10459
10460 #undef bfd_elf32_get_synthetic_symtab
10461
10462 #undef bfd_elf32_bfd_link_hash_table_create
10463 #define bfd_elf32_bfd_link_hash_table_create \
10464 ppc_elf_vxworks_link_hash_table_create
10465 #undef elf_backend_add_symbol_hook
10466 #define elf_backend_add_symbol_hook \
10467 ppc_elf_vxworks_add_symbol_hook
10468 #undef elf_backend_link_output_symbol_hook
10469 #define elf_backend_link_output_symbol_hook \
10470 elf_vxworks_link_output_symbol_hook
10471 #undef elf_backend_final_write_processing
10472 #define elf_backend_final_write_processing \
10473 ppc_elf_vxworks_final_write_processing
10474 #undef elf_backend_get_sec_type_attr
10475 #define elf_backend_get_sec_type_attr \
10476 ppc_elf_vxworks_get_sec_type_attr
10477 #undef elf_backend_emit_relocs
10478 #define elf_backend_emit_relocs \
10479 elf_vxworks_emit_relocs
10480
10481 #undef elf32_bed
10482 #define elf32_bed ppc_elf_vxworks_bed
10483 #undef elf_backend_post_process_headers
10484
10485 #include "elf32-target.h"